return ret;
}
+struct omap_msg_tx_data {
+ mbox_msg_t msg;
+ void *arg;
+};
+
+static void omap_msg_tx_end_io(struct request *rq, int error)
+{
+ kfree(rq->special);
+ __blk_put_request(rq->q, rq);
+}
+
int omap_mbox_msg_send(struct omap_mbox *mbox, mbox_msg_t msg, void* arg)
{
+ struct omap_msg_tx_data *tx_data;
struct request *rq;
struct request_queue *q = mbox->txq->queue;
- int ret = 0;
+
+ tx_data = kmalloc(sizeof(*tx_data), GFP_ATOMIC);
+ if (unlikely(!tx_data))
+ return -ENOMEM;
rq = blk_get_request(q, WRITE, GFP_ATOMIC);
if (unlikely(!rq)) {
- ret = -ENOMEM;
- goto fail;
+ kfree(tx_data);
+ return -ENOMEM;
}
- rq->data = (void *)msg;
- blk_insert_request(q, rq, 0, arg);
+ tx_data->msg = msg;
+ tx_data->arg = arg;
+ rq->end_io = omap_msg_tx_end_io;
+ blk_insert_request(q, rq, 0, tx_data);
schedule_work(&mbox->txq->work);
- fail:
- return ret;
+ return 0;
}
EXPORT_SYMBOL(omap_mbox_msg_send);
struct request_queue *q = mbox->txq->queue;
while (1) {
+ struct omap_msg_tx_data *tx_data;
+
spin_lock(q->queue_lock);
- rq = elv_next_request(q);
+ rq = blk_fetch_request(q);
spin_unlock(q->queue_lock);
if (!rq)
break;
- ret = __mbox_msg_send(mbox, (mbox_msg_t) rq->data, rq->special);
+ tx_data = rq->special;
+
+ ret = __mbox_msg_send(mbox, tx_data->msg, tx_data->arg);
if (ret) {
enable_mbox_irq(mbox, IRQ_TX);
+ spin_lock(q->queue_lock);
+ blk_requeue_request(q, rq);
+ spin_unlock(q->queue_lock);
return;
}
spin_lock(q->queue_lock);
- if (__blk_end_request(rq, 0, 0))
- BUG();
+ __blk_end_request_all(rq, 0);
spin_unlock(q->queue_lock);
}
}
while (1) {
spin_lock_irqsave(q->queue_lock, flags);
- rq = elv_next_request(q);
+ rq = blk_fetch_request(q);
spin_unlock_irqrestore(q->queue_lock, flags);
if (!rq)
break;
- msg = (mbox_msg_t) rq->data;
-
- if (blk_end_request(rq, 0, 0))
- BUG();
-
+ msg = (mbox_msg_t)rq->special;
+ blk_end_request_all(rq, 0);
mbox->rxq->callback((void *)msg);
}
}
goto nomem;
msg = mbox_fifo_read(mbox);
- rq->data = (void *)msg;
if (unlikely(mbox_seq_test(mbox, msg))) {
pr_info("mbox: Illegal seq bit!(%08x)\n", msg);
mbox->err_notify();
}
- blk_insert_request(q, rq, 0, NULL);
+ blk_insert_request(q, rq, 0, (void *)msg);
if (mbox->ops->type == OMAP_MBOX_TYPE1)
break;
}
while (1) {
spin_lock_irqsave(q->queue_lock, flags);
- rq = elv_next_request(q);
+ rq = blk_fetch_request(q);
spin_unlock_irqrestore(q->queue_lock, flags);
if (!rq)
break;
- *p = (mbox_msg_t) rq->data;
+ *p = (mbox_msg_t)rq->special;
- if (blk_end_request(rq, 0, 0))
- BUG();
+ blk_end_request_all(rq, 0);
if (unlikely(mbox_seq_test(mbox, *p))) {
pr_info("mbox: Illegal seq bit!(%08x) ignored\n", *p);
/* Only changed by ubd_init, which is an initcall. */
static int thread_fd = -1;
-
-static void ubd_end_request(struct request *req, int bytes, int error)
-{
- blk_end_request(req, error, bytes);
-}
-
-/* Callable only from interrupt context - otherwise you need to do
- * spin_lock_irq()/spin_lock_irqsave() */
-static inline void ubd_finish(struct request *req, int bytes)
-{
- if(bytes < 0){
- ubd_end_request(req, 0, -EIO);
- return;
- }
- ubd_end_request(req, bytes, 0);
-}
-
static LIST_HEAD(restart);
/* XXX - move this inside ubd_intr. */
static void ubd_handler(void)
{
struct io_thread_req *req;
- struct request *rq;
struct ubd *ubd;
struct list_head *list, *next_ele;
unsigned long flags;
return;
}
- rq = req->req;
- rq->nr_sectors -= req->length >> 9;
- if(rq->nr_sectors == 0)
- ubd_finish(rq, rq->hard_nr_sectors << 9);
+ blk_end_request(req->req, 0, req->length);
kfree(req);
}
reactivate_fd(thread_fd, UBD_IRQ);
{
struct io_thread_req *io_req;
struct request *req;
- int n, last_sectors;
+ sector_t sector;
+ int n;
while(1){
struct ubd *dev = q->queuedata;
if(dev->end_sg == 0){
- struct request *req = elv_next_request(q);
+ struct request *req = blk_fetch_request(q);
if(req == NULL)
return;
dev->request = req;
- blkdev_dequeue_request(req);
dev->start_sg = 0;
dev->end_sg = blk_rq_map_sg(q, req, dev->sg);
}
req = dev->request;
- last_sectors = 0;
+ sector = blk_rq_pos(req);
while(dev->start_sg < dev->end_sg){
struct scatterlist *sg = &dev->sg[dev->start_sg];
- req->sector += last_sectors;
io_req = kmalloc(sizeof(struct io_thread_req),
GFP_ATOMIC);
if(io_req == NULL){
return;
}
prepare_request(req, io_req,
- (unsigned long long) req->sector << 9,
+ (unsigned long long)sector << 9,
sg->offset, sg->length, sg_page(sg));
- last_sectors = sg->length >> 9;
+ sector += sg->length >> 9;
n = os_write_file(thread_fd, &io_req,
sizeof(struct io_thread_req *));
if(n != sizeof(struct io_thread_req *)){
config LBD
bool "Support for large block devices and files"
depends on !64BIT
+ default y
help
Enable block devices or files of size 2TB and larger.
The ext4 filesystem requires that this feature be enabled in
order to support filesystems that have the huge_file feature
- enabled. Otherwise, it will refuse to mount any filesystems
- that use the huge_file feature, which is enabled by default
- by mke2fs.ext4. The GFS2 filesystem also requires this feature.
+ enabled. Otherwise, it will refuse to mount in the read-write
+ mode any filesystems that use the huge_file feature, which is
+ enabled by default by mke2fs.ext4.
- If unsure, say N.
+ The GFS2 filesystem also requires this feature.
+
+ If unsure, say Y.
config BLK_DEV_BSG
bool "Block layer SG support v4 (EXPERIMENTAL)"
data_dir = rq_is_sync(rq1);
last = ad->last_sector[data_dir];
- s1 = rq1->sector;
- s2 = rq2->sector;
+ s1 = blk_rq_pos(rq1);
+ s2 = blk_rq_pos(rq2);
BUG_ON(data_dir != rq_is_sync(rq2));
as_update_thinktime(ad, aic, thinktime);
/* Calculate read -> read seek distance */
- if (aic->last_request_pos < rq->sector)
- seek_dist = rq->sector - aic->last_request_pos;
+ if (aic->last_request_pos < blk_rq_pos(rq))
+ seek_dist = blk_rq_pos(rq) -
+ aic->last_request_pos;
else
- seek_dist = aic->last_request_pos - rq->sector;
+ seek_dist = aic->last_request_pos -
+ blk_rq_pos(rq);
as_update_seekdist(ad, aic, seek_dist);
}
- aic->last_request_pos = rq->sector + rq->nr_sectors;
+ aic->last_request_pos = blk_rq_pos(rq) + blk_rq_sectors(rq);
set_bit(AS_TASK_IOSTARTED, &aic->state);
spin_unlock(&aic->lock);
}
{
unsigned long delay; /* jiffies */
sector_t last = ad->last_sector[ad->batch_data_dir];
- sector_t next = rq->sector;
+ sector_t next = blk_rq_pos(rq);
sector_t delta; /* acceptable close offset (in sectors) */
sector_t s;
* This has to be set in order to be correctly updated by
* as_find_next_rq
*/
- ad->last_sector[data_dir] = rq->sector + rq->nr_sectors;
+ ad->last_sector[data_dir] = blk_rq_pos(rq) + blk_rq_sectors(rq);
if (data_dir == BLK_RW_SYNC) {
struct io_context *ioc = RQ_IOC(rq);
static void as_work_handler(struct work_struct *work)
{
struct as_data *ad = container_of(work, struct as_data, antic_work);
- struct request_queue *q = ad->q;
- unsigned long flags;
- spin_lock_irqsave(q->queue_lock, flags);
- blk_start_queueing(q);
- spin_unlock_irqrestore(q->queue_lock, flags);
+ blk_run_queue(ad->q);
}
static int as_may_queue(struct request_queue *q, int rw)
*/
q->ordseq = 0;
rq = q->orig_bar_rq;
-
- if (__blk_end_request(rq, q->orderr, blk_rq_bytes(rq)))
- BUG();
-
+ __blk_end_request_all(rq, q->orderr);
return true;
}
* For an empty barrier, there's no actual BAR request, which
* in turn makes POSTFLUSH unnecessary. Mask them off.
*/
- if (!rq->hard_nr_sectors) {
+ if (!blk_rq_sectors(rq)) {
q->ordered &= ~(QUEUE_ORDERED_DO_BAR |
QUEUE_ORDERED_DO_POSTFLUSH);
/*
}
/* stash away the original request */
- elv_dequeue_request(q, rq);
+ blk_dequeue_request(rq);
q->orig_bar_rq = rq;
rq = NULL;
} else
skip |= QUEUE_ORDSEQ_PREFLUSH;
- if ((q->ordered & QUEUE_ORDERED_BY_DRAIN) && q->in_flight)
+ if ((q->ordered & QUEUE_ORDERED_BY_DRAIN) && queue_in_flight(q))
rq = NULL;
else
skip |= QUEUE_ORDSEQ_DRAIN;
* Queue ordering not supported. Terminate
* with prejudice.
*/
- elv_dequeue_request(q, rq);
- if (__blk_end_request(rq, -EOPNOTSUPP,
- blk_rq_bytes(rq)))
- BUG();
+ blk_dequeue_request(rq);
+ __blk_end_request_all(rq, -EOPNOTSUPP);
*rqp = NULL;
return false;
}
/*
* The driver must store the error location in ->bi_sector, if
* it supports it. For non-stacked drivers, this should be copied
- * from rq->sector.
+ * from blk_rq_pos(rq).
*/
if (error_sector)
*error_sector = bio->bi_sector;
int rw = rq_data_dir(rq);
int cpu;
- if (!blk_fs_request(rq) || !blk_do_io_stat(rq))
+ if (!blk_do_io_stat(rq))
return;
cpu = part_stat_lock();
- part = disk_map_sector_rcu(rq->rq_disk, rq->sector);
+ part = disk_map_sector_rcu(rq->rq_disk, blk_rq_pos(rq));
if (!new_io)
part_stat_inc(cpu, part, merges[rw]);
INIT_LIST_HEAD(&rq->timeout_list);
rq->cpu = -1;
rq->q = q;
- rq->sector = rq->hard_sector = (sector_t) -1;
+ rq->__sector = (sector_t) -1;
INIT_HLIST_NODE(&rq->hash);
RB_CLEAR_NODE(&rq->rb_node);
rq->cmd = rq->__cmd;
rq->cmd_len = BLK_MAX_CDB;
rq->tag = -1;
rq->ref_count = 1;
+ rq->start_time = jiffies;
}
EXPORT_SYMBOL(blk_rq_init);
rq->rq_disk ? rq->rq_disk->disk_name : "?", rq->cmd_type,
rq->cmd_flags);
- printk(KERN_INFO " sector %llu, nr/cnr %lu/%u\n",
- (unsigned long long)rq->sector,
- rq->nr_sectors,
- rq->current_nr_sectors);
- printk(KERN_INFO " bio %p, biotail %p, buffer %p, data %p, len %u\n",
- rq->bio, rq->biotail,
- rq->buffer, rq->data,
- rq->data_len);
+ printk(KERN_INFO " sector %llu, nr/cnr %u/%u\n",
+ (unsigned long long)blk_rq_pos(rq),
+ blk_rq_sectors(rq), blk_rq_cur_sectors(rq));
+ printk(KERN_INFO " bio %p, biotail %p, buffer %p, len %u\n",
+ rq->bio, rq->biotail, rq->buffer, blk_rq_bytes(rq));
if (blk_pc_request(rq)) {
printk(KERN_INFO " cdb: ");
}
EXPORT_SYMBOL(blk_unplug);
-static void blk_invoke_request_fn(struct request_queue *q)
-{
- if (unlikely(blk_queue_stopped(q)))
- return;
-
- /*
- * one level of recursion is ok and is much faster than kicking
- * the unplug handling
- */
- if (!queue_flag_test_and_set(QUEUE_FLAG_REENTER, q)) {
- q->request_fn(q);
- queue_flag_clear(QUEUE_FLAG_REENTER, q);
- } else {
- queue_flag_set(QUEUE_FLAG_PLUGGED, q);
- kblockd_schedule_work(q, &q->unplug_work);
- }
-}
-
/**
* blk_start_queue - restart a previously stopped queue
* @q: The &struct request_queue in question
WARN_ON(!irqs_disabled());
queue_flag_clear(QUEUE_FLAG_STOPPED, q);
- blk_invoke_request_fn(q);
+ __blk_run_queue(q);
}
EXPORT_SYMBOL(blk_start_queue);
{
blk_remove_plug(q);
+ if (unlikely(blk_queue_stopped(q)))
+ return;
+
+ if (elv_queue_empty(q))
+ return;
+
/*
* Only recurse once to avoid overrunning the stack, let the unplug
* handling reinvoke the handler shortly if we already got there.
*/
- if (!elv_queue_empty(q))
- blk_invoke_request_fn(q);
+ if (!queue_flag_test_and_set(QUEUE_FLAG_REENTER, q)) {
+ q->request_fn(q);
+ queue_flag_clear(QUEUE_FLAG_REENTER, q);
+ } else {
+ queue_flag_set(QUEUE_FLAG_PLUGGED, q);
+ kblockd_schedule_work(q, &q->unplug_work);
+ }
}
EXPORT_SYMBOL(__blk_run_queue);
*
* Description:
* Invoke request handling on this queue, if it has pending work to do.
- * May be used to restart queueing when a request has completed. Also
- * See @blk_start_queueing.
- *
+ * May be used to restart queueing when a request has completed.
*/
void blk_run_queue(struct request_queue *q)
{
EXPORT_SYMBOL(blk_get_request);
/**
- * blk_start_queueing - initiate dispatch of requests to device
- * @q: request queue to kick into gear
+ * blk_make_request - given a bio, allocate a corresponding struct request.
+ *
+ * @bio: The bio describing the memory mappings that will be submitted for IO.
+ * It may be a chained-bio properly constructed by block/bio layer.
+ *
+ * blk_make_request is the parallel of generic_make_request for BLOCK_PC
+ * type commands. Where the struct request needs to be farther initialized by
+ * the caller. It is passed a &struct bio, which describes the memory info of
+ * the I/O transfer.
*
- * This is basically a helper to remove the need to know whether a queue
- * is plugged or not if someone just wants to initiate dispatch of requests
- * for this queue. Should be used to start queueing on a device outside
- * of ->request_fn() context. Also see @blk_run_queue.
+ * The caller of blk_make_request must make sure that bi_io_vec
+ * are set to describe the memory buffers. That bio_data_dir() will return
+ * the needed direction of the request. (And all bio's in the passed bio-chain
+ * are properly set accordingly)
*
- * The queue lock must be held with interrupts disabled.
+ * If called under none-sleepable conditions, mapped bio buffers must not
+ * need bouncing, by calling the appropriate masked or flagged allocator,
+ * suitable for the target device. Otherwise the call to blk_queue_bounce will
+ * BUG.
+ *
+ * WARNING: When allocating/cloning a bio-chain, careful consideration should be
+ * given to how you allocate bios. In particular, you cannot use __GFP_WAIT for
+ * anything but the first bio in the chain. Otherwise you risk waiting for IO
+ * completion of a bio that hasn't been submitted yet, thus resulting in a
+ * deadlock. Alternatively bios should be allocated using bio_kmalloc() instead
+ * of bio_alloc(), as that avoids the mempool deadlock.
+ * If possible a big IO should be split into smaller parts when allocation
+ * fails. Partial allocation should not be an error, or you risk a live-lock.
*/
-void blk_start_queueing(struct request_queue *q)
+struct request *blk_make_request(struct request_queue *q, struct bio *bio,
+ gfp_t gfp_mask)
{
- if (!blk_queue_plugged(q)) {
- if (unlikely(blk_queue_stopped(q)))
- return;
- q->request_fn(q);
- } else
- __generic_unplug_device(q);
+ struct request *rq = blk_get_request(q, bio_data_dir(bio), gfp_mask);
+
+ if (unlikely(!rq))
+ return ERR_PTR(-ENOMEM);
+
+ for_each_bio(bio) {
+ struct bio *bounce_bio = bio;
+ int ret;
+
+ blk_queue_bounce(q, &bounce_bio);
+ ret = blk_rq_append_bio(q, rq, bounce_bio);
+ if (unlikely(ret)) {
+ blk_put_request(rq);
+ return ERR_PTR(ret);
+ }
+ }
+
+ return rq;
}
-EXPORT_SYMBOL(blk_start_queueing);
+EXPORT_SYMBOL(blk_make_request);
/**
* blk_requeue_request - put a request back on queue
*/
void blk_requeue_request(struct request_queue *q, struct request *rq)
{
+ BUG_ON(blk_queued_rq(rq));
+
blk_delete_timer(rq);
blk_clear_rq_complete(rq);
trace_block_rq_requeue(q, rq);
* barrier
*/
rq->cmd_type = REQ_TYPE_SPECIAL;
- rq->cmd_flags |= REQ_SOFTBARRIER;
rq->special = data;
drive_stat_acct(rq, 1);
__elv_add_request(q, rq, where, 0);
- blk_start_queueing(q);
+ __blk_run_queue(q);
spin_unlock_irqrestore(q->queue_lock, flags);
}
EXPORT_SYMBOL(blk_insert_request);
if (bio_failfast_driver(bio))
req->cmd_flags |= REQ_FAILFAST_DRIVER;
- /*
- * REQ_BARRIER implies no merging, but lets make it explicit
- */
if (unlikely(bio_discard(bio))) {
req->cmd_flags |= REQ_DISCARD;
if (bio_barrier(bio))
req->cmd_flags |= REQ_SOFTBARRIER;
req->q->prepare_discard_fn(req->q, req);
} else if (unlikely(bio_barrier(bio)))
- req->cmd_flags |= (REQ_HARDBARRIER | REQ_NOMERGE);
+ req->cmd_flags |= REQ_HARDBARRIER;
if (bio_sync(bio))
req->cmd_flags |= REQ_RW_SYNC;
req->cmd_flags |= REQ_NOIDLE;
req->errors = 0;
- req->hard_sector = req->sector = bio->bi_sector;
+ req->__sector = bio->bi_sector;
req->ioprio = bio_prio(bio);
- req->start_time = jiffies;
blk_rq_bio_prep(req->q, req, bio);
}
static int __make_request(struct request_queue *q, struct bio *bio)
{
struct request *req;
- int el_ret, nr_sectors;
+ int el_ret;
+ unsigned int bytes = bio->bi_size;
const unsigned short prio = bio_prio(bio);
const int sync = bio_sync(bio);
const int unplug = bio_unplug(bio);
int rw_flags;
- nr_sectors = bio_sectors(bio);
-
/*
* low level driver can indicate that it wants pages above a
* certain limit bounced to low memory (ie for highmem, or even
req->biotail->bi_next = bio;
req->biotail = bio;
- req->nr_sectors = req->hard_nr_sectors += nr_sectors;
+ req->__data_len += bytes;
req->ioprio = ioprio_best(req->ioprio, prio);
if (!blk_rq_cpu_valid(req))
req->cpu = bio->bi_comp_cpu;
* not touch req->buffer either...
*/
req->buffer = bio_data(bio);
- req->current_nr_sectors = bio_cur_sectors(bio);
- req->hard_cur_sectors = req->current_nr_sectors;
- req->sector = req->hard_sector = bio->bi_sector;
- req->nr_sectors = req->hard_nr_sectors += nr_sectors;
+ req->__sector = bio->bi_sector;
+ req->__data_len += bytes;
req->ioprio = ioprio_best(req->ioprio, prio);
if (!blk_rq_cpu_valid(req))
req->cpu = bio->bi_comp_cpu;
*/
int blk_rq_check_limits(struct request_queue *q, struct request *rq)
{
- if (rq->nr_sectors > q->max_sectors ||
- rq->data_len > q->max_hw_sectors << 9) {
+ if (blk_rq_sectors(rq) > q->max_sectors ||
+ blk_rq_bytes(rq) > q->max_hw_sectors << 9) {
printk(KERN_ERR "%s: over max size limit.\n", __func__);
return -EIO;
}
}
EXPORT_SYMBOL_GPL(blk_insert_cloned_request);
-/**
- * blkdev_dequeue_request - dequeue request and start timeout timer
- * @req: request to dequeue
- *
- * Dequeue @req and start timeout timer on it. This hands off the
- * request to the driver.
- *
- * Block internal functions which don't want to start timer should
- * call elv_dequeue_request().
- */
-void blkdev_dequeue_request(struct request *req)
-{
- elv_dequeue_request(req->q, req);
-
- /*
- * We are now handing the request to the hardware, add the
- * timeout handler.
- */
- blk_add_timer(req);
-}
-EXPORT_SYMBOL(blkdev_dequeue_request);
-
static void blk_account_io_completion(struct request *req, unsigned int bytes)
{
- if (!blk_do_io_stat(req))
- return;
-
- if (blk_fs_request(req)) {
+ if (blk_do_io_stat(req)) {
const int rw = rq_data_dir(req);
struct hd_struct *part;
int cpu;
cpu = part_stat_lock();
- part = disk_map_sector_rcu(req->rq_disk, req->sector);
+ part = disk_map_sector_rcu(req->rq_disk, blk_rq_pos(req));
part_stat_add(cpu, part, sectors[rw], bytes >> 9);
part_stat_unlock();
}
static void blk_account_io_done(struct request *req)
{
- if (!blk_do_io_stat(req))
- return;
-
/*
* Account IO completion. bar_rq isn't accounted as a normal
* IO on queueing nor completion. Accounting the containing
* request is enough.
*/
- if (blk_fs_request(req) && req != &req->q->bar_rq) {
+ if (blk_do_io_stat(req) && req != &req->q->bar_rq) {
unsigned long duration = jiffies - req->start_time;
const int rw = rq_data_dir(req);
struct hd_struct *part;
int cpu;
cpu = part_stat_lock();
- part = disk_map_sector_rcu(req->rq_disk, req->sector);
+ part = disk_map_sector_rcu(req->rq_disk, blk_rq_pos(req));
part_stat_inc(cpu, part, ios[rw]);
part_stat_add(cpu, part, ticks[rw], duration);
}
/**
- * __end_that_request_first - end I/O on a request
- * @req: the request being processed
+ * blk_peek_request - peek at the top of a request queue
+ * @q: request queue to peek at
+ *
+ * Description:
+ * Return the request at the top of @q. The returned request
+ * should be started using blk_start_request() before LLD starts
+ * processing it.
+ *
+ * Return:
+ * Pointer to the request at the top of @q if available. Null
+ * otherwise.
+ *
+ * Context:
+ * queue_lock must be held.
+ */
+struct request *blk_peek_request(struct request_queue *q)
+{
+ struct request *rq;
+ int ret;
+
+ while ((rq = __elv_next_request(q)) != NULL) {
+ if (!(rq->cmd_flags & REQ_STARTED)) {
+ /*
+ * This is the first time the device driver
+ * sees this request (possibly after
+ * requeueing). Notify IO scheduler.
+ */
+ if (blk_sorted_rq(rq))
+ elv_activate_rq(q, rq);
+
+ /*
+ * just mark as started even if we don't start
+ * it, a request that has been delayed should
+ * not be passed by new incoming requests
+ */
+ rq->cmd_flags |= REQ_STARTED;
+ trace_block_rq_issue(q, rq);
+ }
+
+ if (!q->boundary_rq || q->boundary_rq == rq) {
+ q->end_sector = rq_end_sector(rq);
+ q->boundary_rq = NULL;
+ }
+
+ if (rq->cmd_flags & REQ_DONTPREP)
+ break;
+
+ if (q->dma_drain_size && blk_rq_bytes(rq)) {
+ /*
+ * make sure space for the drain appears we
+ * know we can do this because max_hw_segments
+ * has been adjusted to be one fewer than the
+ * device can handle
+ */
+ rq->nr_phys_segments++;
+ }
+
+ if (!q->prep_rq_fn)
+ break;
+
+ ret = q->prep_rq_fn(q, rq);
+ if (ret == BLKPREP_OK) {
+ break;
+ } else if (ret == BLKPREP_DEFER) {
+ /*
+ * the request may have been (partially) prepped.
+ * we need to keep this request in the front to
+ * avoid resource deadlock. REQ_STARTED will
+ * prevent other fs requests from passing this one.
+ */
+ if (q->dma_drain_size && blk_rq_bytes(rq) &&
+ !(rq->cmd_flags & REQ_DONTPREP)) {
+ /*
+ * remove the space for the drain we added
+ * so that we don't add it again
+ */
+ --rq->nr_phys_segments;
+ }
+
+ rq = NULL;
+ break;
+ } else if (ret == BLKPREP_KILL) {
+ rq->cmd_flags |= REQ_QUIET;
+ __blk_end_request_all(rq, -EIO);
+ } else {
+ printk(KERN_ERR "%s: bad return=%d\n", __func__, ret);
+ break;
+ }
+ }
+
+ return rq;
+}
+EXPORT_SYMBOL(blk_peek_request);
+
+void blk_dequeue_request(struct request *rq)
+{
+ struct request_queue *q = rq->q;
+
+ BUG_ON(list_empty(&rq->queuelist));
+ BUG_ON(ELV_ON_HASH(rq));
+
+ list_del_init(&rq->queuelist);
+
+ /*
+ * the time frame between a request being removed from the lists
+ * and to it is freed is accounted as io that is in progress at
+ * the driver side.
+ */
+ if (blk_account_rq(rq))
+ q->in_flight[rq_is_sync(rq)]++;
+}
+
+/**
+ * blk_start_request - start request processing on the driver
+ * @req: request to dequeue
+ *
+ * Description:
+ * Dequeue @req and start timeout timer on it. This hands off the
+ * request to the driver.
+ *
+ * Block internal functions which don't want to start timer should
+ * call blk_dequeue_request().
+ *
+ * Context:
+ * queue_lock must be held.
+ */
+void blk_start_request(struct request *req)
+{
+ blk_dequeue_request(req);
+
+ /*
+ * We are now handing the request to the hardware, initialize
+ * resid_len to full count and add the timeout handler.
+ */
+ req->resid_len = blk_rq_bytes(req);
+ blk_add_timer(req);
+}
+EXPORT_SYMBOL(blk_start_request);
+
+/**
+ * blk_fetch_request - fetch a request from a request queue
+ * @q: request queue to fetch a request from
+ *
+ * Description:
+ * Return the request at the top of @q. The request is started on
+ * return and LLD can start processing it immediately.
+ *
+ * Return:
+ * Pointer to the request at the top of @q if available. Null
+ * otherwise.
+ *
+ * Context:
+ * queue_lock must be held.
+ */
+struct request *blk_fetch_request(struct request_queue *q)
+{
+ struct request *rq;
+
+ rq = blk_peek_request(q);
+ if (rq)
+ blk_start_request(rq);
+ return rq;
+}
+EXPORT_SYMBOL(blk_fetch_request);
+
+/**
+ * blk_update_request - Special helper function for request stacking drivers
+ * @rq: the request being processed
* @error: %0 for success, < %0 for error
- * @nr_bytes: number of bytes to complete
+ * @nr_bytes: number of bytes to complete @rq
*
* Description:
- * Ends I/O on a number of bytes attached to @req, and sets it up
- * for the next range of segments (if any) in the cluster.
+ * Ends I/O on a number of bytes attached to @rq, but doesn't complete
+ * the request structure even if @rq doesn't have leftover.
+ * If @rq has leftover, sets it up for the next range of segments.
+ *
+ * This special helper function is only for request stacking drivers
+ * (e.g. request-based dm) so that they can handle partial completion.
+ * Actual device drivers should use blk_end_request instead.
+ *
+ * Passing the result of blk_rq_bytes() as @nr_bytes guarantees
+ * %false return from this function.
*
* Return:
- * %0 - we are done with this request, call end_that_request_last()
- * %1 - still buffers pending for this request
+ * %false - this request doesn't have any more data
+ * %true - this request has more data
**/
-static int __end_that_request_first(struct request *req, int error,
- int nr_bytes)
+bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
{
int total_bytes, bio_nbytes, next_idx = 0;
struct bio *bio;
+ if (!req->bio)
+ return false;
+
trace_block_rq_complete(req->q, req);
/*
- * for a REQ_TYPE_BLOCK_PC request, we want to carry any eventual
- * sense key with us all the way through
+ * For fs requests, rq is just carrier of independent bio's
+ * and each partial completion should be handled separately.
+ * Reset per-request error on each partial completion.
+ *
+ * TODO: tj: This is too subtle. It would be better to let
+ * low level drivers do what they see fit.
*/
- if (!blk_pc_request(req))
+ if (blk_fs_request(req))
req->errors = 0;
if (error && (blk_fs_request(req) && !(req->cmd_flags & REQ_QUIET))) {
printk(KERN_ERR "end_request: I/O error, dev %s, sector %llu\n",
req->rq_disk ? req->rq_disk->disk_name : "?",
- (unsigned long long)req->sector);
+ (unsigned long long)blk_rq_pos(req));
}
blk_account_io_completion(req, nr_bytes);
/*
* completely done
*/
- if (!req->bio)
- return 0;
+ if (!req->bio) {
+ /*
+ * Reset counters so that the request stacking driver
+ * can find how many bytes remain in the request
+ * later.
+ */
+ req->__data_len = 0;
+ return false;
+ }
/*
* if the request wasn't completed, update state
bio_iovec(bio)->bv_len -= nr_bytes;
}
- blk_recalc_rq_sectors(req, total_bytes >> 9);
+ req->__data_len -= total_bytes;
+ req->buffer = bio_data(req->bio);
+
+ /* update sector only for requests with clear definition of sector */
+ if (blk_fs_request(req) || blk_discard_rq(req))
+ req->__sector += total_bytes >> 9;
+
+ /*
+ * If total number of sectors is less than the first segment
+ * size, something has gone terribly wrong.
+ */
+ if (blk_rq_bytes(req) < blk_rq_cur_bytes(req)) {
+ printk(KERN_ERR "blk: request botched\n");
+ req->__data_len = blk_rq_cur_bytes(req);
+ }
+
+ /* recalculate the number of segments */
blk_recalc_rq_segments(req);
- return 1;
+
+ return true;
+}
+EXPORT_SYMBOL_GPL(blk_update_request);
+
+static bool blk_update_bidi_request(struct request *rq, int error,
+ unsigned int nr_bytes,
+ unsigned int bidi_bytes)
+{
+ if (blk_update_request(rq, error, nr_bytes))
+ return true;
+
+ /* Bidi request must be completed as a whole */
+ if (unlikely(blk_bidi_rq(rq)) &&
+ blk_update_request(rq->next_rq, error, bidi_bytes))
+ return true;
+
+ add_disk_randomness(rq->rq_disk);
+
+ return false;
}
/*
* queue lock must be held
*/
-static void end_that_request_last(struct request *req, int error)
+static void blk_finish_request(struct request *req, int error)
{
+ BUG_ON(blk_queued_rq(req));
+
if (blk_rq_tagged(req))
blk_queue_end_tag(req->q, req);
- if (blk_queued_rq(req))
- elv_dequeue_request(req->q, req);
-
if (unlikely(laptop_mode) && blk_fs_request(req))
laptop_io_completion();
}
/**
- * blk_rq_bytes - Returns bytes left to complete in the entire request
- * @rq: the request being processed
- **/
-unsigned int blk_rq_bytes(struct request *rq)
-{
- if (blk_fs_request(rq))
- return rq->hard_nr_sectors << 9;
-
- return rq->data_len;
-}
-EXPORT_SYMBOL_GPL(blk_rq_bytes);
-
-/**
- * blk_rq_cur_bytes - Returns bytes left to complete in the current segment
- * @rq: the request being processed
- **/
-unsigned int blk_rq_cur_bytes(struct request *rq)
-{
- if (blk_fs_request(rq))
- return rq->current_nr_sectors << 9;
-
- if (rq->bio)
- return rq->bio->bi_size;
-
- return rq->data_len;
-}
-EXPORT_SYMBOL_GPL(blk_rq_cur_bytes);
-
-/**
- * end_request - end I/O on the current segment of the request
- * @req: the request being processed
- * @uptodate: error value or %0/%1 uptodate flag
+ * blk_end_bidi_request - Complete a bidi request
+ * @rq: the request to complete
+ * @error: %0 for success, < %0 for error
+ * @nr_bytes: number of bytes to complete @rq
+ * @bidi_bytes: number of bytes to complete @rq->next_rq
*
* Description:
- * Ends I/O on the current segment of a request. If that is the only
- * remaining segment, the request is also completed and freed.
- *
- * This is a remnant of how older block drivers handled I/O completions.
- * Modern drivers typically end I/O on the full request in one go, unless
- * they have a residual value to account for. For that case this function
- * isn't really useful, unless the residual just happens to be the
- * full current segment. In other words, don't use this function in new
- * code. Use blk_end_request() or __blk_end_request() to end a request.
+ * Ends I/O on a number of bytes attached to @rq and @rq->next_rq.
+ * Drivers that supports bidi can safely call this member for any
+ * type of request, bidi or uni. In the later case @bidi_bytes is
+ * just ignored.
+ *
+ * Return:
+ * %false - we are done with this request
+ * %true - still buffers pending for this request
**/
-void end_request(struct request *req, int uptodate)
-{
- int error = 0;
-
- if (uptodate <= 0)
- error = uptodate ? uptodate : -EIO;
-
- __blk_end_request(req, error, req->hard_cur_sectors << 9);
-}
-EXPORT_SYMBOL(end_request);
-
-static int end_that_request_data(struct request *rq, int error,
+static bool blk_end_bidi_request(struct request *rq, int error,
unsigned int nr_bytes, unsigned int bidi_bytes)
{
- if (rq->bio) {
- if (__end_that_request_first(rq, error, nr_bytes))
- return 1;
+ struct request_queue *q = rq->q;
+ unsigned long flags;
- /* Bidi request must be completed as a whole */
- if (blk_bidi_rq(rq) &&
- __end_that_request_first(rq->next_rq, error, bidi_bytes))
- return 1;
- }
+ if (blk_update_bidi_request(rq, error, nr_bytes, bidi_bytes))
+ return true;
- return 0;
+ spin_lock_irqsave(q->queue_lock, flags);
+ blk_finish_request(rq, error);
+ spin_unlock_irqrestore(q->queue_lock, flags);
+
+ return false;
}
/**
- * blk_end_io - Generic end_io function to complete a request.
- * @rq: the request being processed
- * @error: %0 for success, < %0 for error
- * @nr_bytes: number of bytes to complete @rq
- * @bidi_bytes: number of bytes to complete @rq->next_rq
- * @drv_callback: function called between completion of bios in the request
- * and completion of the request.
- * If the callback returns non %0, this helper returns without
- * completion of the request.
+ * __blk_end_bidi_request - Complete a bidi request with queue lock held
+ * @rq: the request to complete
+ * @error: %0 for success, < %0 for error
+ * @nr_bytes: number of bytes to complete @rq
+ * @bidi_bytes: number of bytes to complete @rq->next_rq
*
* Description:
- * Ends I/O on a number of bytes attached to @rq and @rq->next_rq.
- * If @rq has leftover, sets it up for the next range of segments.
+ * Identical to blk_end_bidi_request() except that queue lock is
+ * assumed to be locked on entry and remains so on return.
*
* Return:
- * %0 - we are done with this request
- * %1 - this request is not freed yet, it still has pending buffers.
+ * %false - we are done with this request
+ * %true - still buffers pending for this request
**/
-static int blk_end_io(struct request *rq, int error, unsigned int nr_bytes,
- unsigned int bidi_bytes,
- int (drv_callback)(struct request *))
+static bool __blk_end_bidi_request(struct request *rq, int error,
+ unsigned int nr_bytes, unsigned int bidi_bytes)
{
- struct request_queue *q = rq->q;
- unsigned long flags = 0UL;
-
- if (end_that_request_data(rq, error, nr_bytes, bidi_bytes))
- return 1;
-
- /* Special feature for tricky drivers */
- if (drv_callback && drv_callback(rq))
- return 1;
-
- add_disk_randomness(rq->rq_disk);
+ if (blk_update_bidi_request(rq, error, nr_bytes, bidi_bytes))
+ return true;
- spin_lock_irqsave(q->queue_lock, flags);
- end_that_request_last(rq, error);
- spin_unlock_irqrestore(q->queue_lock, flags);
+ blk_finish_request(rq, error);
- return 0;
+ return false;
}
/**
* If @rq has leftover, sets it up for the next range of segments.
*
* Return:
- * %0 - we are done with this request
- * %1 - still buffers pending for this request
+ * %false - we are done with this request
+ * %true - still buffers pending for this request
**/
-int blk_end_request(struct request *rq, int error, unsigned int nr_bytes)
+bool blk_end_request(struct request *rq, int error, unsigned int nr_bytes)
{
- return blk_end_io(rq, error, nr_bytes, 0, NULL);
+ return blk_end_bidi_request(rq, error, nr_bytes, 0);
}
EXPORT_SYMBOL_GPL(blk_end_request);
/**
- * __blk_end_request - Helper function for drivers to complete the request.
- * @rq: the request being processed
- * @error: %0 for success, < %0 for error
- * @nr_bytes: number of bytes to complete
+ * blk_end_request_all - Helper function for drives to finish the request.
+ * @rq: the request to finish
+ * @err: %0 for success, < %0 for error
*
* Description:
- * Must be called with queue lock held unlike blk_end_request().
- *
- * Return:
- * %0 - we are done with this request
- * %1 - still buffers pending for this request
- **/
-int __blk_end_request(struct request *rq, int error, unsigned int nr_bytes)
+ * Completely finish @rq.
+ */
+void blk_end_request_all(struct request *rq, int error)
{
- if (rq->bio && __end_that_request_first(rq, error, nr_bytes))
- return 1;
+ bool pending;
+ unsigned int bidi_bytes = 0;
- add_disk_randomness(rq->rq_disk);
+ if (unlikely(blk_bidi_rq(rq)))
+ bidi_bytes = blk_rq_bytes(rq->next_rq);
- end_that_request_last(rq, error);
+ pending = blk_end_bidi_request(rq, error, blk_rq_bytes(rq), bidi_bytes);
+ BUG_ON(pending);
+}
+EXPORT_SYMBOL_GPL(blk_end_request_all);
- return 0;
+/**
+ * blk_end_request_cur - Helper function to finish the current request chunk.
+ * @rq: the request to finish the current chunk for
+ * @err: %0 for success, < %0 for error
+ *
+ * Description:
+ * Complete the current consecutively mapped chunk from @rq.
+ *
+ * Return:
+ * %false - we are done with this request
+ * %true - still buffers pending for this request
+ */
+bool blk_end_request_cur(struct request *rq, int error)
+{
+ return blk_end_request(rq, error, blk_rq_cur_bytes(rq));
}
-EXPORT_SYMBOL_GPL(__blk_end_request);
+EXPORT_SYMBOL_GPL(blk_end_request_cur);
/**
- * blk_end_bidi_request - Helper function for drivers to complete bidi request.
- * @rq: the bidi request being processed
- * @error: %0 for success, < %0 for error
- * @nr_bytes: number of bytes to complete @rq
- * @bidi_bytes: number of bytes to complete @rq->next_rq
+ * __blk_end_request - Helper function for drivers to complete the request.
+ * @rq: the request being processed
+ * @error: %0 for success, < %0 for error
+ * @nr_bytes: number of bytes to complete
*
* Description:
- * Ends I/O on a number of bytes attached to @rq and @rq->next_rq.
+ * Must be called with queue lock held unlike blk_end_request().
*
* Return:
- * %0 - we are done with this request
- * %1 - still buffers pending for this request
+ * %false - we are done with this request
+ * %true - still buffers pending for this request
**/
-int blk_end_bidi_request(struct request *rq, int error, unsigned int nr_bytes,
- unsigned int bidi_bytes)
+bool __blk_end_request(struct request *rq, int error, unsigned int nr_bytes)
{
- return blk_end_io(rq, error, nr_bytes, bidi_bytes, NULL);
+ return __blk_end_bidi_request(rq, error, nr_bytes, 0);
}
-EXPORT_SYMBOL_GPL(blk_end_bidi_request);
+EXPORT_SYMBOL_GPL(__blk_end_request);
/**
- * blk_update_request - Special helper function for request stacking drivers
- * @rq: the request being processed
- * @error: %0 for success, < %0 for error
- * @nr_bytes: number of bytes to complete @rq
+ * __blk_end_request_all - Helper function for drives to finish the request.
+ * @rq: the request to finish
+ * @err: %0 for success, < %0 for error
*
* Description:
- * Ends I/O on a number of bytes attached to @rq, but doesn't complete
- * the request structure even if @rq doesn't have leftover.
- * If @rq has leftover, sets it up for the next range of segments.
- *
- * This special helper function is only for request stacking drivers
- * (e.g. request-based dm) so that they can handle partial completion.
- * Actual device drivers should use blk_end_request instead.
+ * Completely finish @rq. Must be called with queue lock held.
*/
-void blk_update_request(struct request *rq, int error, unsigned int nr_bytes)
+void __blk_end_request_all(struct request *rq, int error)
{
- if (!end_that_request_data(rq, error, nr_bytes, 0)) {
- /*
- * These members are not updated in end_that_request_data()
- * when all bios are completed.
- * Update them so that the request stacking driver can find
- * how many bytes remain in the request later.
- */
- rq->nr_sectors = rq->hard_nr_sectors = 0;
- rq->current_nr_sectors = rq->hard_cur_sectors = 0;
- }
+ bool pending;
+ unsigned int bidi_bytes = 0;
+
+ if (unlikely(blk_bidi_rq(rq)))
+ bidi_bytes = blk_rq_bytes(rq->next_rq);
+
+ pending = __blk_end_bidi_request(rq, error, blk_rq_bytes(rq), bidi_bytes);
+ BUG_ON(pending);
}
-EXPORT_SYMBOL_GPL(blk_update_request);
+EXPORT_SYMBOL_GPL(__blk_end_request_all);
/**
- * blk_end_request_callback - Special helper function for tricky drivers
- * @rq: the request being processed
- * @error: %0 for success, < %0 for error
- * @nr_bytes: number of bytes to complete
- * @drv_callback: function called between completion of bios in the request
- * and completion of the request.
- * If the callback returns non %0, this helper returns without
- * completion of the request.
+ * __blk_end_request_cur - Helper function to finish the current request chunk.
+ * @rq: the request to finish the current chunk for
+ * @err: %0 for success, < %0 for error
*
* Description:
- * Ends I/O on a number of bytes attached to @rq.
- * If @rq has leftover, sets it up for the next range of segments.
- *
- * This special helper function is used only for existing tricky drivers.
- * (e.g. cdrom_newpc_intr() of ide-cd)
- * This interface will be removed when such drivers are rewritten.
- * Don't use this interface in other places anymore.
+ * Complete the current consecutively mapped chunk from @rq. Must
+ * be called with queue lock held.
*
* Return:
- * %0 - we are done with this request
- * %1 - this request is not freed yet.
- * this request still has pending buffers or
- * the driver doesn't want to finish this request yet.
- **/
-int blk_end_request_callback(struct request *rq, int error,
- unsigned int nr_bytes,
- int (drv_callback)(struct request *))
+ * %false - we are done with this request
+ * %true - still buffers pending for this request
+ */
+bool __blk_end_request_cur(struct request *rq, int error)
{
- return blk_end_io(rq, error, nr_bytes, 0, drv_callback);
+ return __blk_end_request(rq, error, blk_rq_cur_bytes(rq));
}
-EXPORT_SYMBOL_GPL(blk_end_request_callback);
+EXPORT_SYMBOL_GPL(__blk_end_request_cur);
void blk_rq_bio_prep(struct request_queue *q, struct request *rq,
struct bio *bio)
rq->nr_phys_segments = bio_phys_segments(q, bio);
rq->buffer = bio_data(bio);
}
- rq->current_nr_sectors = bio_cur_sectors(bio);
- rq->hard_cur_sectors = rq->current_nr_sectors;
- rq->hard_nr_sectors = rq->nr_sectors = bio_sectors(bio);
- rq->data_len = bio->bi_size;
-
+ rq->__data_len = bio->bi_size;
rq->bio = rq->biotail = bio;
if (bio->bi_bdev)
int __init blk_dev_init(void)
{
+ BUILD_BUG_ON(__REQ_NR_BITS > 8 *
+ sizeof(((struct request *)0)->cmd_flags));
+
kblockd_workqueue = create_workqueue("kblockd");
if (!kblockd_workqueue)
panic("Failed to create kblockd\n");
int where = at_head ? ELEVATOR_INSERT_FRONT : ELEVATOR_INSERT_BACK;
rq->rq_disk = bd_disk;
- rq->cmd_flags |= REQ_NOMERGE;
rq->end_io = done;
WARN_ON(irqs_disabled());
spin_lock_irq(q->queue_lock);
rq->biotail->bi_next = bio;
rq->biotail = bio;
- rq->data_len += bio->bi_size;
+ rq->__data_len += bio->bi_size;
}
return 0;
}
-EXPORT_SYMBOL(blk_rq_append_bio);
static int __blk_rq_unmap_user(struct bio *bio)
{
if (!bio_flagged(bio, BIO_USER_MAPPED))
rq->cmd_flags |= REQ_COPY_USER;
- rq->buffer = rq->data = NULL;
+ rq->buffer = NULL;
return 0;
unmap_rq:
blk_rq_unmap_user(bio);
blk_queue_bounce(q, &bio);
bio_get(bio);
blk_rq_bio_prep(q, rq, bio);
- rq->buffer = rq->data = NULL;
+ rq->buffer = NULL;
return 0;
}
EXPORT_SYMBOL(blk_rq_map_user_iov);
*
* Description:
* Data will be mapped directly if possible. Otherwise a bounce
- * buffer is used.
+ * buffer is used. Can be called multple times to append multple
+ * buffers.
*/
int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf,
unsigned int len, gfp_t gfp_mask)
int reading = rq_data_dir(rq) == READ;
int do_copy = 0;
struct bio *bio;
+ int ret;
if (len > (q->max_hw_sectors << 9))
return -EINVAL;
if (do_copy)
rq->cmd_flags |= REQ_COPY_USER;
- blk_rq_bio_prep(q, rq, bio);
+ ret = blk_rq_append_bio(q, rq, bio);
+ if (unlikely(ret)) {
+ /* request is too big */
+ bio_put(bio);
+ return ret;
+ }
+
blk_queue_bounce(q, &rq->bio);
- rq->buffer = rq->data = NULL;
+ rq->buffer = NULL;
return 0;
}
EXPORT_SYMBOL(blk_rq_map_kern);
#include "blk.h"
-void blk_recalc_rq_sectors(struct request *rq, int nsect)
-{
- if (blk_fs_request(rq) || blk_discard_rq(rq)) {
- rq->hard_sector += nsect;
- rq->hard_nr_sectors -= nsect;
-
- /*
- * Move the I/O submission pointers ahead if required.
- */
- if ((rq->nr_sectors >= rq->hard_nr_sectors) &&
- (rq->sector <= rq->hard_sector)) {
- rq->sector = rq->hard_sector;
- rq->nr_sectors = rq->hard_nr_sectors;
- rq->hard_cur_sectors = bio_cur_sectors(rq->bio);
- rq->current_nr_sectors = rq->hard_cur_sectors;
- rq->buffer = bio_data(rq->bio);
- }
-
- /*
- * if total number of sectors is less than the first segment
- * size, something has gone terribly wrong
- */
- if (rq->nr_sectors < rq->current_nr_sectors) {
- printk(KERN_ERR "blk: request botched\n");
- rq->nr_sectors = rq->current_nr_sectors;
- }
- }
-}
-
static unsigned int __blk_recalc_rq_segments(struct request_queue *q,
struct bio *bio)
{
if (unlikely(rq->cmd_flags & REQ_COPY_USER) &&
- (rq->data_len & q->dma_pad_mask)) {
- unsigned int pad_len = (q->dma_pad_mask & ~rq->data_len) + 1;
+ (blk_rq_bytes(rq) & q->dma_pad_mask)) {
+ unsigned int pad_len =
+ (q->dma_pad_mask & ~blk_rq_bytes(rq)) + 1;
sg->length += pad_len;
rq->extra_len += pad_len;
else
max_sectors = q->max_sectors;
- if (req->nr_sectors + bio_sectors(bio) > max_sectors) {
+ if (blk_rq_sectors(req) + bio_sectors(bio) > max_sectors) {
req->cmd_flags |= REQ_NOMERGE;
if (req == q->last_merge)
q->last_merge = NULL;
max_sectors = q->max_sectors;
- if (req->nr_sectors + bio_sectors(bio) > max_sectors) {
+ if (blk_rq_sectors(req) + bio_sectors(bio) > max_sectors) {
req->cmd_flags |= REQ_NOMERGE;
if (req == q->last_merge)
q->last_merge = NULL;
/*
* Will it become too large?
*/
- if ((req->nr_sectors + next->nr_sectors) > q->max_sectors)
+ if ((blk_rq_sectors(req) + blk_rq_sectors(next)) > q->max_sectors)
return 0;
total_phys_segments = req->nr_phys_segments + next->nr_phys_segments;
int cpu;
cpu = part_stat_lock();
- part = disk_map_sector_rcu(req->rq_disk, req->sector);
+ part = disk_map_sector_rcu(req->rq_disk, blk_rq_pos(req));
part_round_stats(cpu, part);
part_dec_in_flight(part);
/*
* not contiguous
*/
- if (req->sector + req->nr_sectors != next->sector)
+ if (blk_rq_pos(req) + blk_rq_sectors(req) != blk_rq_pos(next))
return 0;
if (rq_data_dir(req) != rq_data_dir(next)
req->biotail->bi_next = next->bio;
req->biotail = next->biotail;
- req->nr_sectors = req->hard_nr_sectors += next->hard_nr_sectors;
+ req->__data_len += blk_rq_bytes(next);
elv_merge_requests(q, req, next);
int blk_queue_start_tag(struct request_queue *q, struct request *rq)
{
struct blk_queue_tag *bqt = q->queue_tags;
- unsigned max_depth, offset;
+ unsigned max_depth;
int tag;
if (unlikely((rq->cmd_flags & REQ_QUEUED))) {
* to starve sync IO on behalf of flooding async IO.
*/
max_depth = bqt->max_depth;
- if (rq_is_sync(rq))
- offset = 0;
- else
- offset = max_depth >> 2;
+ if (!rq_is_sync(rq) && max_depth > 1) {
+ max_depth -= 2;
+ if (!max_depth)
+ max_depth = 1;
+ if (q->in_flight[0] > max_depth)
+ return 1;
+ }
do {
- tag = find_next_zero_bit(bqt->tag_map, max_depth, offset);
+ tag = find_first_zero_bit(bqt->tag_map, max_depth);
if (tag >= max_depth)
return 1;
rq->cmd_flags |= REQ_QUEUED;
rq->tag = tag;
bqt->tag_index[tag] = rq;
- blkdev_dequeue_request(rq);
+ blk_start_request(rq);
list_add(&rq->queuelist, &q->tag_busy_list);
return 0;
}
if (blk_mark_rq_complete(rq))
continue;
blk_rq_timed_out(rq);
- } else {
- if (!next || time_after(next, rq->deadline))
- next = rq->deadline;
- }
+ } else if (!next || time_after(next, rq->deadline))
+ next = rq->deadline;
}
/*
BUG_ON(!list_empty(&req->timeout_list));
BUG_ON(test_bit(REQ_ATOM_COMPLETE, &req->atomic_flags));
- if (req->timeout)
- req->deadline = jiffies + req->timeout;
- else {
- req->deadline = jiffies + q->rq_timeout;
- /*
- * Some LLDs, like scsi, peek at the timeout to prevent
- * a command from being retried forever.
- */
+ /*
+ * Some LLDs, like scsi, peek at the timeout to prevent a
+ * command from being retried forever.
+ */
+ if (!req->timeout)
req->timeout = q->rq_timeout;
- }
+
+ req->deadline = jiffies + req->timeout;
list_add_tail(&req->timeout_list, &q->timeout_list);
/*
void init_request_from_bio(struct request *req, struct bio *bio);
void blk_rq_bio_prep(struct request_queue *q, struct request *rq,
struct bio *bio);
+int blk_rq_append_bio(struct request_queue *q, struct request *rq,
+ struct bio *bio);
+void blk_dequeue_request(struct request *rq);
void __blk_queue_free_tags(struct request_queue *q);
void blk_unplug_work(struct work_struct *work);
clear_bit(REQ_ATOM_COMPLETE, &rq->atomic_flags);
}
+/*
+ * Internal elevator interface
+ */
+#define ELV_ON_HASH(rq) (!hlist_unhashed(&(rq)->hash))
+
+static inline struct request *__elv_next_request(struct request_queue *q)
+{
+ struct request *rq;
+
+ while (1) {
+ while (!list_empty(&q->queue_head)) {
+ rq = list_entry_rq(q->queue_head.next);
+ if (blk_do_ordered(q, &rq))
+ return rq;
+ }
+
+ if (!q->elevator->ops->elevator_dispatch_fn(q, 0))
+ return NULL;
+ }
+}
+
+static inline void elv_activate_rq(struct request_queue *q, struct request *rq)
+{
+ struct elevator_queue *e = q->elevator;
+
+ if (e->ops->elevator_activate_req_fn)
+ e->ops->elevator_activate_req_fn(q, rq);
+}
+
+static inline void elv_deactivate_rq(struct request_queue *q, struct request *rq)
+{
+ struct elevator_queue *e = q->elevator;
+
+ if (e->ops->elevator_deactivate_req_fn)
+ e->ops->elevator_deactivate_req_fn(q, rq);
+}
+
#ifdef CONFIG_FAIL_IO_TIMEOUT
int blk_should_fake_timeout(struct request_queue *);
ssize_t part_timeout_show(struct device *, struct device_attribute *, char *);
int attempt_back_merge(struct request_queue *q, struct request *rq);
int attempt_front_merge(struct request_queue *q, struct request *rq);
void blk_recalc_rq_segments(struct request *rq);
-void blk_recalc_rq_sectors(struct request *rq, int nsect);
void blk_queue_congestion_threshold(struct request_queue *q);
#endif
}
+/*
+ * Contribute to IO statistics IFF:
+ *
+ * a) it's attached to a gendisk, and
+ * b) the queue had IO stats enabled when this request was started, and
+ * c) it's a file system request
+ */
static inline int blk_do_io_stat(struct request *rq)
{
- return rq->rq_disk && blk_rq_io_stat(rq);
+ return rq->rq_disk && blk_rq_io_stat(rq) && blk_fs_request(rq) &&
+ blk_discard_rq(rq);
}
#endif
}
if (rq->next_rq) {
- hdr->dout_resid = rq->data_len;
- hdr->din_resid = rq->next_rq->data_len;
+ hdr->dout_resid = rq->resid_len;
+ hdr->din_resid = rq->next_rq->resid_len;
blk_rq_unmap_user(bidi_bio);
blk_put_request(rq->next_rq);
} else if (rq_data_dir(rq) == READ)
- hdr->din_resid = rq->data_len;
+ hdr->din_resid = rq->resid_len;
else
- hdr->dout_resid = rq->data_len;
+ hdr->dout_resid = rq->resid_len;
/*
* If the request generated a negative error number, return it
else if (rq_is_meta(rq2) && !rq_is_meta(rq1))
return rq2;
- s1 = rq1->sector;
- s2 = rq2->sector;
+ s1 = blk_rq_pos(rq1);
+ s2 = blk_rq_pos(rq2);
last = cfqd->last_position;
* Sort strictly based on sector. Smallest to the left,
* largest to the right.
*/
- if (sector > cfqq->next_rq->sector)
+ if (sector > blk_rq_pos(cfqq->next_rq))
n = &(*p)->rb_right;
- else if (sector < cfqq->next_rq->sector)
+ else if (sector < blk_rq_pos(cfqq->next_rq))
n = &(*p)->rb_left;
else
break;
return;
cfqq->p_root = &cfqd->prio_trees[cfqq->org_ioprio];
- __cfqq = cfq_prio_tree_lookup(cfqd, cfqq->p_root, cfqq->next_rq->sector,
- &parent, &p);
+ __cfqq = cfq_prio_tree_lookup(cfqd, cfqq->p_root,
+ blk_rq_pos(cfqq->next_rq), &parent, &p);
if (!__cfqq) {
rb_link_node(&cfqq->p_node, parent, p);
rb_insert_color(&cfqq->p_node, cfqq->p_root);
cfq_log_cfqq(cfqd, RQ_CFQQ(rq), "activate rq, drv=%d",
cfqd->rq_in_driver);
- cfqd->last_position = rq->hard_sector + rq->hard_nr_sectors;
+ cfqd->last_position = blk_rq_pos(rq) + blk_rq_sectors(rq);
}
static void cfq_deactivate_request(struct request_queue *q, struct request *rq)
static inline sector_t cfq_dist_from_last(struct cfq_data *cfqd,
struct request *rq)
{
- if (rq->sector >= cfqd->last_position)
- return rq->sector - cfqd->last_position;
+ if (blk_rq_pos(rq) >= cfqd->last_position)
+ return blk_rq_pos(rq) - cfqd->last_position;
else
- return cfqd->last_position - rq->sector;
+ return cfqd->last_position - blk_rq_pos(rq);
}
#define CIC_SEEK_THR 8 * 1024
if (cfq_rq_close(cfqd, __cfqq->next_rq))
return __cfqq;
- if (__cfqq->next_rq->sector < sector)
+ if (blk_rq_pos(__cfqq->next_rq) < sector)
node = rb_next(&__cfqq->p_node);
else
node = rb_prev(&__cfqq->p_node);
if (!cic->last_request_pos)
sdist = 0;
- else if (cic->last_request_pos < rq->sector)
- sdist = rq->sector - cic->last_request_pos;
+ else if (cic->last_request_pos < blk_rq_pos(rq))
+ sdist = blk_rq_pos(rq) - cic->last_request_pos;
else
- sdist = cic->last_request_pos - rq->sector;
+ sdist = cic->last_request_pos - blk_rq_pos(rq);
/*
* Don't allow the seek distance to get too large from the
cfq_update_io_seektime(cfqd, cic, rq);
cfq_update_idle_window(cfqd, cfqq, cic);
- cic->last_request_pos = rq->sector + rq->nr_sectors;
+ cic->last_request_pos = blk_rq_pos(rq) + blk_rq_sectors(rq);
if (cfqq == cfqd->active_queue) {
/*
if (blk_rq_bytes(rq) > PAGE_CACHE_SIZE ||
cfqd->busy_queues > 1) {
del_timer(&cfqd->idle_slice_timer);
- blk_start_queueing(cfqd->queue);
+ __blk_run_queue(cfqd->queue);
}
cfq_mark_cfqq_must_dispatch(cfqq);
}
* this new queue is RT and the current one is BE
*/
cfq_preempt_queue(cfqd, cfqq);
- blk_start_queueing(cfqd->queue);
+ __blk_run_queue(cfqd->queue);
}
}
struct request_queue *q = cfqd->queue;
spin_lock_irq(q->queue_lock);
- blk_start_queueing(q);
+ __blk_run_queue(cfqd->queue);
spin_unlock_irq(q->queue_lock);
}
__rq = elv_rb_find(&dd->sort_list[bio_data_dir(bio)], sector);
if (__rq) {
- BUG_ON(sector != __rq->sector);
+ BUG_ON(sector != blk_rq_pos(__rq));
if (elv_rq_merge_ok(__rq, bio)) {
ret = ELEVATOR_FRONT_MERGE;
#define ELV_HASH_FN(sec) \
(hash_long(ELV_HASH_BLOCK((sec)), elv_hash_shift))
#define ELV_HASH_ENTRIES (1 << elv_hash_shift)
-#define rq_hash_key(rq) ((rq)->sector + (rq)->nr_sectors)
-#define ELV_ON_HASH(rq) (!hlist_unhashed(&(rq)->hash))
+#define rq_hash_key(rq) (blk_rq_pos(rq) + blk_rq_sectors(rq))
DEFINE_TRACE(block_rq_insert);
DEFINE_TRACE(block_rq_issue);
* we can merge and sequence is ok, check if it's possible
*/
if (elv_rq_merge_ok(__rq, bio)) {
- if (__rq->sector + __rq->nr_sectors == bio->bi_sector)
+ if (blk_rq_pos(__rq) + blk_rq_sectors(__rq) == bio->bi_sector)
ret = ELEVATOR_BACK_MERGE;
- else if (__rq->sector - bio_sectors(bio) == bio->bi_sector)
+ else if (blk_rq_pos(__rq) - bio_sectors(bio) == bio->bi_sector)
ret = ELEVATOR_FRONT_MERGE;
}
}
EXPORT_SYMBOL(elevator_exit);
-static void elv_activate_rq(struct request_queue *q, struct request *rq)
-{
- struct elevator_queue *e = q->elevator;
-
- if (e->ops->elevator_activate_req_fn)
- e->ops->elevator_activate_req_fn(q, rq);
-}
-
-static void elv_deactivate_rq(struct request_queue *q, struct request *rq)
-{
- struct elevator_queue *e = q->elevator;
-
- if (e->ops->elevator_deactivate_req_fn)
- e->ops->elevator_deactivate_req_fn(q, rq);
-}
-
static inline void __elv_rqhash_del(struct request *rq)
{
hlist_del_init(&rq->hash);
parent = *p;
__rq = rb_entry(parent, struct request, rb_node);
- if (rq->sector < __rq->sector)
+ if (blk_rq_pos(rq) < blk_rq_pos(__rq))
p = &(*p)->rb_left;
- else if (rq->sector > __rq->sector)
+ else if (blk_rq_pos(rq) > blk_rq_pos(__rq))
p = &(*p)->rb_right;
else
return __rq;
while (n) {
rq = rb_entry(n, struct request, rb_node);
- if (sector < rq->sector)
+ if (sector < blk_rq_pos(rq))
n = n->rb_left;
- else if (sector > rq->sector)
+ else if (sector > blk_rq_pos(rq))
n = n->rb_right;
else
return rq;
break;
if (pos->cmd_flags & stop_flags)
break;
- if (rq->sector >= boundary) {
- if (pos->sector < boundary)
+ if (blk_rq_pos(rq) >= boundary) {
+ if (blk_rq_pos(pos) < boundary)
continue;
} else {
- if (pos->sector >= boundary)
+ if (blk_rq_pos(pos) >= boundary)
break;
}
- if (rq->sector >= pos->sector)
+ if (blk_rq_pos(rq) >= blk_rq_pos(pos))
break;
}
* in_flight count again
*/
if (blk_account_rq(rq)) {
- q->in_flight--;
+ q->in_flight[rq_is_sync(rq)]--;
if (blk_sorted_rq(rq))
elv_deactivate_rq(q, rq);
}
*/
elv_drain_elevator(q);
while (q->rq.elvpriv) {
- blk_start_queueing(q);
+ __blk_run_queue(q);
spin_unlock_irq(q->queue_lock);
msleep(10);
spin_lock_irq(q->queue_lock);
* with anything. There's no point in delaying queue
* processing.
*/
- blk_remove_plug(q);
- blk_start_queueing(q);
+ __blk_run_queue(q);
break;
case ELEVATOR_INSERT_SORT:
if (unplug_it && blk_queue_plugged(q)) {
int nrq = q->rq.count[BLK_RW_SYNC] + q->rq.count[BLK_RW_ASYNC]
- - q->in_flight;
+ - queue_in_flight(q);
if (nrq >= q->unplug_thresh)
__generic_unplug_device(q);
}
EXPORT_SYMBOL(elv_add_request);
-static inline struct request *__elv_next_request(struct request_queue *q)
-{
- struct request *rq;
-
- while (1) {
- while (!list_empty(&q->queue_head)) {
- rq = list_entry_rq(q->queue_head.next);
- if (blk_do_ordered(q, &rq))
- return rq;
- }
-
- if (!q->elevator->ops->elevator_dispatch_fn(q, 0))
- return NULL;
- }
-}
-
-struct request *elv_next_request(struct request_queue *q)
-{
- struct request *rq;
- int ret;
-
- while ((rq = __elv_next_request(q)) != NULL) {
- if (!(rq->cmd_flags & REQ_STARTED)) {
- /*
- * This is the first time the device driver
- * sees this request (possibly after
- * requeueing). Notify IO scheduler.
- */
- if (blk_sorted_rq(rq))
- elv_activate_rq(q, rq);
-
- /*
- * just mark as started even if we don't start
- * it, a request that has been delayed should
- * not be passed by new incoming requests
- */
- rq->cmd_flags |= REQ_STARTED;
- trace_block_rq_issue(q, rq);
- }
-
- if (!q->boundary_rq || q->boundary_rq == rq) {
- q->end_sector = rq_end_sector(rq);
- q->boundary_rq = NULL;
- }
-
- if (rq->cmd_flags & REQ_DONTPREP)
- break;
-
- if (q->dma_drain_size && rq->data_len) {
- /*
- * make sure space for the drain appears we
- * know we can do this because max_hw_segments
- * has been adjusted to be one fewer than the
- * device can handle
- */
- rq->nr_phys_segments++;
- }
-
- if (!q->prep_rq_fn)
- break;
-
- ret = q->prep_rq_fn(q, rq);
- if (ret == BLKPREP_OK) {
- break;
- } else if (ret == BLKPREP_DEFER) {
- /*
- * the request may have been (partially) prepped.
- * we need to keep this request in the front to
- * avoid resource deadlock. REQ_STARTED will
- * prevent other fs requests from passing this one.
- */
- if (q->dma_drain_size && rq->data_len &&
- !(rq->cmd_flags & REQ_DONTPREP)) {
- /*
- * remove the space for the drain we added
- * so that we don't add it again
- */
- --rq->nr_phys_segments;
- }
-
- rq = NULL;
- break;
- } else if (ret == BLKPREP_KILL) {
- rq->cmd_flags |= REQ_QUIET;
- __blk_end_request(rq, -EIO, blk_rq_bytes(rq));
- } else {
- printk(KERN_ERR "%s: bad return=%d\n", __func__, ret);
- break;
- }
- }
-
- return rq;
-}
-EXPORT_SYMBOL(elv_next_request);
-
-void elv_dequeue_request(struct request_queue *q, struct request *rq)
-{
- BUG_ON(list_empty(&rq->queuelist));
- BUG_ON(ELV_ON_HASH(rq));
-
- list_del_init(&rq->queuelist);
-
- /*
- * the time frame between a request being removed from the lists
- * and to it is freed is accounted as io that is in progress at
- * the driver side.
- */
- if (blk_account_rq(rq))
- q->in_flight++;
-}
-
int elv_queue_empty(struct request_queue *q)
{
struct elevator_queue *e = q->elevator;
rq = list_entry_rq(q->queue_head.next);
rq->cmd_flags |= REQ_QUIET;
trace_block_rq_abort(q, rq);
- __blk_end_request(rq, -EIO, blk_rq_bytes(rq));
+ __blk_end_request_all(rq, -EIO);
}
}
EXPORT_SYMBOL(elv_abort_queue);
* request is released from the driver, io must be done
*/
if (blk_account_rq(rq)) {
- q->in_flight--;
+ q->in_flight[rq_is_sync(rq)]--;
if (blk_sorted_rq(rq) && e->ops->elevator_completed_req_fn)
e->ops->elevator_completed_req_fn(q, rq);
}
if (!list_empty(&q->queue_head))
next = list_entry_rq(q->queue_head.next);
- if (!q->in_flight &&
+ if (!queue_in_flight(q) &&
blk_ordered_cur_seq(q) == QUEUE_ORDSEQ_DRAIN &&
(!next || blk_ordered_req_seq(next) > QUEUE_ORDSEQ_DRAIN)) {
blk_ordered_complete_seq(q, QUEUE_ORDSEQ_DRAIN, 0);
- blk_start_queueing(q);
+ __blk_run_queue(q);
}
}
}
hdr->info = 0;
if (hdr->masked_status || hdr->host_status || hdr->driver_status)
hdr->info |= SG_INFO_CHECK;
- hdr->resid = rq->data_len;
+ hdr->resid = rq->resid_len;
hdr->sb_len_wr = 0;
if (rq->sense_len && hdr->sbp) {
rq = blk_get_request(q, WRITE, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_BLOCK_PC;
- rq->data = NULL;
- rq->data_len = 0;
- rq->extra_len = 0;
rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
rq->cmd[0] = cmd;
rq->cmd[4] = data;
if (likely(!blk_pc_request(rq)))
return 0;
- if (!rq->data_len || (rq->cmd_flags & REQ_RW))
+ if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_RW))
return 0;
return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
DAC960_Command_T *Command;
while(1) {
- Request = elv_next_request(req_q);
+ Request = blk_peek_request(req_q);
if (!Request)
return 1;
}
Command->Completion = Request->end_io_data;
Command->LogicalDriveNumber = (long)Request->rq_disk->private_data;
- Command->BlockNumber = Request->sector;
- Command->BlockCount = Request->nr_sectors;
+ Command->BlockNumber = blk_rq_pos(Request);
+ Command->BlockCount = blk_rq_sectors(Request);
Command->Request = Request;
- blkdev_dequeue_request(Request);
+ blk_start_request(Request);
Command->SegmentCount = blk_rq_map_sg(req_q,
Command->Request, Command->cmd_sglist);
/* pci_map_sg MAY change the value of SegCount */
* successfully as possible.
*/
Command->SegmentCount = 1;
- Command->BlockNumber = Request->sector;
+ Command->BlockNumber = blk_rq_pos(Request);
Command->BlockCount = 1;
DAC960_QueueReadWriteCommand(Command);
return;
config MG_DISK
tristate "mGine mflash, gflash support"
- depends on ARM && ATA && GPIOLIB
+ depends on ARM && GPIOLIB
help
mGine mFlash(gFlash) block device driver
MODULE_LICENSE("GPL");
static struct request_queue *floppy_queue;
-#define QUEUE (floppy_queue)
-#define CURRENT elv_next_request(floppy_queue)
/*
* Macros
static void redo_fd_request(void)
{
+ struct request *rq;
unsigned int cnt, block, track, sector;
int drive;
struct amiga_floppy_struct *floppy;
char *data;
unsigned long flags;
+ int err;
- repeat:
- if (!CURRENT) {
+next_req:
+ rq = blk_fetch_request(floppy_queue);
+ if (!rq) {
/* Nothing left to do */
return;
}
- floppy = CURRENT->rq_disk->private_data;
+ floppy = rq->rq_disk->private_data;
drive = floppy - unit;
+next_segment:
/* Here someone could investigate to be more efficient */
- for (cnt = 0; cnt < CURRENT->current_nr_sectors; cnt++) {
+ for (cnt = 0, err = 0; cnt < blk_rq_cur_sectors(rq); cnt++) {
#ifdef DEBUG
printk("fd: sector %ld + %d requested for %s\n",
- CURRENT->sector,cnt,
- (rq_data_dir(CURRENT) == READ) ? "read" : "write");
+ blk_rq_pos(rq), cnt,
+ (rq_data_dir(rq) == READ) ? "read" : "write");
#endif
- block = CURRENT->sector + cnt;
+ block = blk_rq_pos(rq) + cnt;
if ((int)block > floppy->blocks) {
- end_request(CURRENT, 0);
- goto repeat;
+ err = -EIO;
+ break;
}
track = block / (floppy->dtype->sects * floppy->type->sect_mult);
sector = block % (floppy->dtype->sects * floppy->type->sect_mult);
- data = CURRENT->buffer + 512 * cnt;
+ data = rq->buffer + 512 * cnt;
#ifdef DEBUG
printk("access to track %d, sector %d, with buffer at "
"0x%08lx\n", track, sector, data);
#endif
- if ((rq_data_dir(CURRENT) != READ) && (rq_data_dir(CURRENT) != WRITE)) {
- printk(KERN_WARNING "do_fd_request: unknown command\n");
- end_request(CURRENT, 0);
- goto repeat;
- }
if (get_track(drive, track) == -1) {
- end_request(CURRENT, 0);
- goto repeat;
+ err = -EIO;
+ break;
}
- switch (rq_data_dir(CURRENT)) {
- case READ:
+ if (rq_data_dir(rq) == READ) {
memcpy(data, floppy->trackbuf + sector * 512, 512);
- break;
-
- case WRITE:
+ } else {
memcpy(floppy->trackbuf + sector * 512, data, 512);
/* keep the drive spinning while writes are scheduled */
if (!fd_motor_on(drive)) {
- end_request(CURRENT, 0);
- goto repeat;
+ err = -EIO;
+ break;
}
/*
* setup a callback to write the track buffer
/* reset the timer */
mod_timer (flush_track_timer + drive, jiffies + 1);
local_irq_restore(flags);
- break;
}
}
- CURRENT->nr_sectors -= CURRENT->current_nr_sectors;
- CURRENT->sector += CURRENT->current_nr_sectors;
- end_request(CURRENT, 1);
- goto repeat;
+ if (__blk_end_request_cur(rq, err))
+ goto next_segment;
+ goto next_req;
}
static void do_fd_request(struct request_queue * q)
#undef DEBUG
static struct request_queue *floppy_queue;
-
-#define QUEUE (floppy_queue)
-#define CURRENT elv_next_request(floppy_queue)
+static struct request *fd_request;
/* Disk types: DD, HD, ED */
static struct atari_disk_type {
static DEFINE_TIMER(timeout_timer, fd_times_out, 0, 0);
static DEFINE_TIMER(fd_timer, check_change, 0, 0);
+static void fd_end_request_cur(int err)
+{
+ if (!__blk_end_request_cur(fd_request, err))
+ fd_request = NULL;
+}
+
static inline void start_motor_off_timer(void)
{
mod_timer(&motor_off_timer, jiffies + FD_MOTOR_OFF_DELAY);
return;
}
- if (!CURRENT)
+ if (!fd_request)
return;
- CURRENT->errors++;
- if (CURRENT->errors >= MAX_ERRORS) {
+ fd_request->errors++;
+ if (fd_request->errors >= MAX_ERRORS) {
printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive );
- end_request(CURRENT, 0);
+ fd_end_request_cur(-EIO);
}
- else if (CURRENT->errors == RECALIBRATE_ERRORS) {
+ else if (fd_request->errors == RECALIBRATE_ERRORS) {
printk(KERN_WARNING "fd%d: recalibrating\n", SelectedDrive );
if (SelectedDrive != -1)
SUD.track = -1;
if (IS_BUFFERED( drive, ReqSide, ReqTrack )) {
if (ReqCmd == READ) {
copy_buffer( SECTOR_BUFFER(ReqSector), ReqData );
- if (++ReqCnt < CURRENT->current_nr_sectors) {
+ if (++ReqCnt < blk_rq_cur_sectors(fd_request)) {
/* read next sector */
setup_req_params( drive );
goto repeat;
}
else {
/* all sectors finished */
- CURRENT->nr_sectors -= CURRENT->current_nr_sectors;
- CURRENT->sector += CURRENT->current_nr_sectors;
- end_request(CURRENT, 1);
+ fd_end_request_cur(0);
redo_fd_request();
return;
}
}
}
- if (++ReqCnt < CURRENT->current_nr_sectors) {
+ if (++ReqCnt < blk_rq_cur_sectors(fd_request)) {
/* read next sector */
setup_req_params( SelectedDrive );
do_fd_action( SelectedDrive );
}
else {
/* all sectors finished */
- CURRENT->nr_sectors -= CURRENT->current_nr_sectors;
- CURRENT->sector += CURRENT->current_nr_sectors;
- end_request(CURRENT, 1);
+ fd_end_request_cur(0);
redo_fd_request();
}
return;
ReqData = ReqBuffer + 512 * ReqCnt;
if (UseTrackbuffer)
- read_track = (ReqCmd == READ && CURRENT->errors == 0);
+ read_track = (ReqCmd == READ && fd_request->errors == 0);
else
read_track = 0;
int drive, type;
struct atari_floppy_struct *floppy;
- DPRINT(("redo_fd_request: CURRENT=%p dev=%s CURRENT->sector=%ld\n",
- CURRENT, CURRENT ? CURRENT->rq_disk->disk_name : "",
- CURRENT ? CURRENT->sector : 0 ));
+ DPRINT(("redo_fd_request: fd_request=%p dev=%s fd_request->sector=%ld\n",
+ fd_request, fd_request ? fd_request->rq_disk->disk_name : "",
+ fd_request ? blk_rq_pos(fd_request) : 0 ));
IsFormatting = 0;
repeat:
+ if (!fd_request) {
+ fd_request = blk_fetch_request(floppy_queue);
+ if (!fd_request)
+ goto the_end;
+ }
- if (!CURRENT)
- goto the_end;
-
- floppy = CURRENT->rq_disk->private_data;
+ floppy = fd_request->rq_disk->private_data;
drive = floppy - unit;
type = floppy->type;
if (!UD.connected) {
/* drive not connected */
printk(KERN_ERR "Unknown Device: fd%d\n", drive );
- end_request(CURRENT, 0);
+ fd_end_request_cur(-EIO);
goto repeat;
}
/* user supplied disk type */
if (--type >= NUM_DISK_MINORS) {
printk(KERN_WARNING "fd%d: invalid disk format", drive );
- end_request(CURRENT, 0);
+ fd_end_request_cur(-EIO);
goto repeat;
}
if (minor2disktype[type].drive_types > DriveType) {
printk(KERN_WARNING "fd%d: unsupported disk format", drive );
- end_request(CURRENT, 0);
+ fd_end_request_cur(-EIO);
goto repeat;
}
type = minor2disktype[type].index;
UD.autoprobe = 0;
}
- if (CURRENT->sector + 1 > UDT->blocks) {
- end_request(CURRENT, 0);
+ if (blk_rq_pos(fd_request) + 1 > UDT->blocks) {
+ fd_end_request_cur(-EIO);
goto repeat;
}
del_timer( &motor_off_timer );
ReqCnt = 0;
- ReqCmd = rq_data_dir(CURRENT);
- ReqBlock = CURRENT->sector;
- ReqBuffer = CURRENT->buffer;
+ ReqCmd = rq_data_dir(fd_request);
+ ReqBlock = blk_rq_pos(fd_request);
+ ReqBuffer = fd_request->buffer;
setup_req_params( drive );
do_fd_action( drive );
{
CommandList_struct *cmd = rq->completion_data;
ctlr_info_t *h = hba[cmd->ctlr];
- unsigned int nr_bytes;
unsigned long flags;
u64bit temp64;
int i, ddir;
printk("Done with %p\n", rq);
#endif /* CCISS_DEBUG */
- /*
- * Store the full size and set the residual count for pc requests
- */
- nr_bytes = blk_rq_bytes(rq);
+ /* set the residual count for pc requests */
if (blk_pc_request(rq))
- rq->data_len = cmd->err_info->ResidualCnt;
+ rq->resid_len = cmd->err_info->ResidualCnt;
- if (blk_end_request(rq, (rq->errors == 0) ? 0 : -EIO, nr_bytes))
- BUG();
+ blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
spin_lock_irqsave(&h->lock, flags);
cmd_free(h, cmd, 1);
printk(KERN_WARNING "cciss: cmd %p has"
" completed with data underrun "
"reported\n", cmd);
- cmd->rq->data_len = cmd->err_info->ResidualCnt;
+ cmd->rq->resid_len = cmd->err_info->ResidualCnt;
}
break;
case CMD_DATA_OVERRUN:
goto startio;
queue:
- creq = elv_next_request(q);
+ creq = blk_peek_request(q);
if (!creq)
goto startio;
if ((c = cmd_alloc(h, 1)) == NULL)
goto full;
- blkdev_dequeue_request(creq);
+ blk_start_request(creq);
spin_unlock_irq(q->queue_lock);
c->Request.Timeout = 0; // Don't time out
c->Request.CDB[0] =
(rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
- start_blk = creq->sector;
+ start_blk = blk_rq_pos(creq);
#ifdef CCISS_DEBUG
- printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n", (int)creq->sector,
- (int)creq->nr_sectors);
+ printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
+ (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
#endif /* CCISS_DEBUG */
sg_init_table(tmp_sg, MAXSGENTRIES);
h->maxSG = seg;
#ifdef CCISS_DEBUG
- printk(KERN_DEBUG "cciss: Submitting %lu sectors in %d segments\n",
- creq->nr_sectors, seg);
+ printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n",
+ blk_rq_sectors(creq), seg);
#endif /* CCISS_DEBUG */
c->Header.SGList = c->Header.SGTotal = seg;
c->Request.CDB[4] = (start_blk >> 8) & 0xff;
c->Request.CDB[5] = start_blk & 0xff;
c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
- c->Request.CDB[7] = (creq->nr_sectors >> 8) & 0xff;
- c->Request.CDB[8] = creq->nr_sectors & 0xff;
+ c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
+ c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
} else {
u32 upper32 = upper_32_bits(start_blk);
c->Request.CDB[7]= (start_blk >> 16) & 0xff;
c->Request.CDB[8]= (start_blk >> 8) & 0xff;
c->Request.CDB[9]= start_blk & 0xff;
- c->Request.CDB[10]= (creq->nr_sectors >> 24) & 0xff;
- c->Request.CDB[11]= (creq->nr_sectors >> 16) & 0xff;
- c->Request.CDB[12]= (creq->nr_sectors >> 8) & 0xff;
- c->Request.CDB[13]= creq->nr_sectors & 0xff;
+ c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
+ c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
+ c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
+ c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
c->Request.CDB[14] = c->Request.CDB[15] = 0;
}
} else if (blk_pc_request(creq)) {
goto startio;
queue_next:
- creq = elv_next_request(q);
+ creq = blk_peek_request(q);
if (!creq)
goto startio;
if ((c = cmd_alloc(h,1)) == NULL)
goto startio;
- blkdev_dequeue_request(creq);
+ blk_start_request(creq);
c->ctlr = h->ctlr;
c->hdr.unit = (drv_info_t *)(creq->rq_disk->private_data) - h->drv;
c->hdr.size = sizeof(rblk_t) >> 2;
c->size += sizeof(rblk_t);
- c->req.hdr.blk = creq->sector;
+ c->req.hdr.blk = blk_rq_pos(creq);
c->rq = creq;
DBGPX(
- printk("sector=%d, nr_sectors=%d\n", creq->sector, creq->nr_sectors);
+ printk("sector=%d, nr_sectors=%u\n",
+ blk_rq_pos(creq), blk_rq_sectors(creq));
);
sg_init_table(tmp_sg, SG_MAX);
seg = blk_rq_map_sg(q, creq, tmp_sg);
tmp_sg[i].offset,
tmp_sg[i].length, dir);
}
-DBGPX( printk("Submitting %d sectors in %d segments\n", creq->nr_sectors, seg); );
+DBGPX( printk("Submitting %u sectors in %d segments\n", blk_rq_sectors(creq), seg); );
c->req.hdr.sg_cnt = seg;
- c->req.hdr.blk_cnt = creq->nr_sectors;
+ c->req.hdr.blk_cnt = blk_rq_sectors(creq);
c->req.hdr.cmd = (rq_data_dir(creq) == READ) ? IDA_READ : IDA_WRITE;
c->type = CMD_RWREQ;
cmd->req.sg[i].size, ddir);
DBGPX(printk("Done with %p\n", rq););
- if (__blk_end_request(rq, error, blk_rq_bytes(rq)))
- BUG();
+ __blk_end_request_all(rq, error);
}
/*
del_timer(&fd_timeout);
cont = NULL;
clear_bit(0, &fdc_busy);
- if (elv_next_request(floppy_queue))
+ if (current_req || blk_peek_request(floppy_queue))
do_fd_request(floppy_queue);
spin_unlock_irqrestore(&floppy_lock, flags);
wake_up(&fdc_wait);
/* current_count_sectors can be zero if transfer failed */
if (error)
- nr_sectors = req->current_nr_sectors;
+ nr_sectors = blk_rq_cur_sectors(req);
if (__blk_end_request(req, error, nr_sectors << 9))
return;
if (uptodate) {
/* maintain values for invalidation on geometry
* change */
- block = current_count_sectors + req->sector;
+ block = current_count_sectors + blk_rq_pos(req);
INFBOUND(DRS->maxblock, block);
if (block > _floppy->sect)
DRS->maxtrack = 1;
/* record write error information */
DRWE->write_errors++;
if (DRWE->write_errors == 1) {
- DRWE->first_error_sector = req->sector;
+ DRWE->first_error_sector = blk_rq_pos(req);
DRWE->first_error_generation = DRS->generation;
}
- DRWE->last_error_sector = req->sector;
+ DRWE->last_error_sector = blk_rq_pos(req);
DRWE->last_error_generation = DRS->generation;
}
spin_lock_irqsave(q->queue_lock, flags);
max_sector = transfer_size(ssize,
min(max_sector, max_sector_2),
- current_req->nr_sectors);
+ blk_rq_sectors(current_req));
if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE &&
- buffer_max > fsector_t + current_req->nr_sectors)
+ buffer_max > fsector_t + blk_rq_sectors(current_req))
current_count_sectors = min_t(int, buffer_max - fsector_t,
- current_req->nr_sectors);
+ blk_rq_sectors(current_req));
remaining = current_count_sectors << 9;
#ifdef FLOPPY_SANITY_CHECK
- if ((remaining >> 9) > current_req->nr_sectors &&
- CT(COMMAND) == FD_WRITE) {
+ if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) {
DPRINT("in copy buffer\n");
printk("current_count_sectors=%ld\n", current_count_sectors);
printk("remaining=%d\n", remaining >> 9);
- printk("current_req->nr_sectors=%ld\n",
- current_req->nr_sectors);
+ printk("current_req->nr_sectors=%u\n",
+ blk_rq_sectors(current_req));
printk("current_req->current_nr_sectors=%u\n",
- current_req->current_nr_sectors);
+ blk_rq_cur_sectors(current_req));
printk("max_sector=%d\n", max_sector);
printk("ssize=%d\n", ssize);
}
dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9);
- size = current_req->current_nr_sectors << 9;
+ size = blk_rq_cur_bytes(current_req);
rq_for_each_segment(bv, current_req, iter) {
if (!remaining)
max_sector = _floppy->sect * _floppy->head;
- TRACK = (int)current_req->sector / max_sector;
- fsector_t = (int)current_req->sector % max_sector;
+ TRACK = (int)blk_rq_pos(current_req) / max_sector;
+ fsector_t = (int)blk_rq_pos(current_req) % max_sector;
if (_floppy->track && TRACK >= _floppy->track) {
- if (current_req->current_nr_sectors & 1) {
+ if (blk_rq_cur_sectors(current_req) & 1) {
current_count_sectors = 1;
return 1;
} else
if (fsector_t >= max_sector) {
current_count_sectors =
min_t(int, _floppy->sect - fsector_t,
- current_req->nr_sectors);
+ blk_rq_sectors(current_req));
return 1;
}
SIZECODE = 2;
in_sector_offset = (fsector_t % _floppy->sect) % ssize;
aligned_sector_t = fsector_t - in_sector_offset;
- max_size = current_req->nr_sectors;
+ max_size = blk_rq_sectors(current_req);
if ((raw_cmd->track == buffer_track) &&
(current_drive == buffer_drive) &&
(fsector_t >= buffer_min) && (fsector_t < buffer_max)) {
copy_buffer(1, max_sector, buffer_max);
return 1;
}
- } else if (in_sector_offset || current_req->nr_sectors < ssize) {
+ } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) {
if (CT(COMMAND) == FD_WRITE) {
- if (fsector_t + current_req->nr_sectors > ssize &&
- fsector_t + current_req->nr_sectors < ssize + ssize)
+ if (fsector_t + blk_rq_sectors(current_req) > ssize &&
+ fsector_t + blk_rq_sectors(current_req) < ssize + ssize)
max_size = ssize + ssize;
else
max_size = ssize;
(indirect * 2 > direct * 3 &&
*errors < DP->max_errors.read_track && ((!probing
|| (DP->read_track & (1 << DRS->probed_format)))))) {
- max_size = current_req->nr_sectors;
+ max_size = blk_rq_sectors(current_req);
} else {
raw_cmd->kernel_data = current_req->buffer;
raw_cmd->length = current_count_sectors << 9;
fsector_t > buffer_max ||
fsector_t < buffer_min ||
((CT(COMMAND) == FD_READ ||
- (!in_sector_offset && current_req->nr_sectors >= ssize)) &&
+ (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) &&
max_sector > 2 * max_buffer_sectors + buffer_min &&
max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)
/* not enough space */
printk("write\n");
return 0;
}
- } else if (raw_cmd->length > current_req->nr_sectors << 9 ||
- current_count_sectors > current_req->nr_sectors) {
+ } else if (raw_cmd->length > blk_rq_bytes(current_req) ||
+ current_count_sectors > blk_rq_sectors(current_req)) {
DPRINT("buffer overrun in direct transfer\n");
return 0;
} else if (raw_cmd->length < current_count_sectors << 9) {
struct request *req;
spin_lock_irq(floppy_queue->queue_lock);
- req = elv_next_request(floppy_queue);
+ req = blk_fetch_request(floppy_queue);
spin_unlock_irq(floppy_queue->queue_lock);
if (!req) {
do_floppy = NULL;
if (usage_count == 0) {
printk("warning: usage count=0, current_req=%p exiting\n",
current_req);
- printk("sect=%ld type=%x flags=%x\n", (long)current_req->sector,
- current_req->cmd_type, current_req->cmd_flags);
+ printk("sect=%ld type=%x flags=%x\n",
+ (long)blk_rq_pos(current_req), current_req->cmd_type,
+ current_req->cmd_flags);
return;
}
if (test_bit(0, &fdc_busy)) {
static DEFINE_SPINLOCK(hd_lock);
static struct request_queue *hd_queue;
+static struct request *hd_req;
#define MAJOR_NR HD_MAJOR
-#define QUEUE (hd_queue)
-#define CURRENT elv_next_request(hd_queue)
#define TIMEOUT_VALUE (6*HZ)
#define HD_DELAY 0
NR_HD = hdind+1;
}
+static bool hd_end_request(int err, unsigned int bytes)
+{
+ if (__blk_end_request(hd_req, err, bytes))
+ return true;
+ hd_req = NULL;
+ return false;
+}
+
+static bool hd_end_request_cur(int err)
+{
+ return hd_end_request(err, blk_rq_cur_bytes(hd_req));
+}
+
static void dump_status(const char *msg, unsigned int stat)
{
char *name = "hd?";
- if (CURRENT)
- name = CURRENT->rq_disk->disk_name;
+ if (hd_req)
+ name = hd_req->rq_disk->disk_name;
#ifdef VERBOSE_ERRORS
printk("%s: %s: status=0x%02x { ", name, msg, stat & 0xff);
if (hd_error & (BBD_ERR|ECC_ERR|ID_ERR|MARK_ERR)) {
printk(", CHS=%d/%d/%d", (inb(HD_HCYL)<<8) + inb(HD_LCYL),
inb(HD_CURRENT) & 0xf, inb(HD_SECTOR));
- if (CURRENT)
- printk(", sector=%ld", CURRENT->sector);
+ if (hd_req)
+ printk(", sector=%ld", blk_rq_pos(hd_req));
}
printk("\n");
}
*/
static void bad_rw_intr(void)
{
- struct request *req = CURRENT;
+ struct request *req = hd_req;
+
if (req != NULL) {
struct hd_i_struct *disk = req->rq_disk->private_data;
if (++req->errors >= MAX_ERRORS || (hd_error & BBD_ERR)) {
- end_request(req, 0);
+ hd_end_request_cur(-EIO);
disk->special_op = disk->recalibrate = 1;
} else if (req->errors % RESET_FREQ == 0)
reset = 1;
bad_rw_intr();
hd_request();
return;
+
ok_to_read:
- req = CURRENT;
+ req = hd_req;
insw(HD_DATA, req->buffer, 256);
- req->sector++;
- req->buffer += 512;
- req->errors = 0;
- i = --req->nr_sectors;
- --req->current_nr_sectors;
#ifdef DEBUG
- printk("%s: read: sector %ld, remaining = %ld, buffer=%p\n",
- req->rq_disk->disk_name, req->sector, req->nr_sectors,
- req->buffer+512);
+ printk("%s: read: sector %ld, remaining = %u, buffer=%p\n",
+ req->rq_disk->disk_name, blk_rq_pos(req) + 1,
+ blk_rq_sectors(req) - 1, req->buffer+512);
#endif
- if (req->current_nr_sectors <= 0)
- end_request(req, 1);
- if (i > 0) {
+ if (hd_end_request(0, 512)) {
SET_HANDLER(&read_intr);
return;
}
+
(void) inb_p(HD_STATUS);
#if (HD_DELAY > 0)
last_req = read_timer();
#endif
- if (elv_next_request(QUEUE))
- hd_request();
- return;
+ hd_request();
}
static void write_intr(void)
{
- struct request *req = CURRENT;
+ struct request *req = hd_req;
int i;
int retries = 100000;
continue;
if (!OK_STATUS(i))
break;
- if ((req->nr_sectors <= 1) || (i & DRQ_STAT))
+ if ((blk_rq_sectors(req) <= 1) || (i & DRQ_STAT))
goto ok_to_write;
} while (--retries > 0);
dump_status("write_intr", i);
bad_rw_intr();
hd_request();
return;
+
ok_to_write:
- req->sector++;
- i = --req->nr_sectors;
- --req->current_nr_sectors;
- req->buffer += 512;
- if (!i || (req->bio && req->current_nr_sectors <= 0))
- end_request(req, 1);
- if (i > 0) {
+ if (hd_end_request(0, 512)) {
SET_HANDLER(&write_intr);
outsw(HD_DATA, req->buffer, 256);
- } else {
+ return;
+ }
+
#if (HD_DELAY > 0)
- last_req = read_timer();
+ last_req = read_timer();
#endif
- hd_request();
- }
- return;
+ hd_request();
}
static void recal_intr(void)
do_hd = NULL;
- if (!CURRENT)
+ if (!hd_req)
return;
spin_lock_irq(hd_queue->queue_lock);
reset = 1;
- name = CURRENT->rq_disk->disk_name;
+ name = hd_req->rq_disk->disk_name;
printk("%s: timeout\n", name);
- if (++CURRENT->errors >= MAX_ERRORS) {
+ if (++hd_req->errors >= MAX_ERRORS) {
#ifdef DEBUG
printk("%s: too many errors\n", name);
#endif
- end_request(CURRENT, 0);
+ hd_end_request_cur(-EIO);
}
hd_request();
spin_unlock_irq(hd_queue->queue_lock);
}
if (disk->head > 16) {
printk("%s: cannot handle device with more than 16 heads - giving up\n", req->rq_disk->disk_name);
- end_request(req, 0);
+ hd_end_request_cur(-EIO);
}
disk->special_op = 0;
return 1;
repeat:
del_timer(&device_timer);
- req = CURRENT;
- if (!req) {
- do_hd = NULL;
- return;
+ if (!hd_req) {
+ hd_req = blk_fetch_request(hd_queue);
+ if (!hd_req) {
+ do_hd = NULL;
+ return;
+ }
}
+ req = hd_req;
if (reset) {
reset_hd();
return;
}
disk = req->rq_disk->private_data;
- block = req->sector;
- nsect = req->nr_sectors;
+ block = blk_rq_pos(req);
+ nsect = blk_rq_sectors(req);
if (block >= get_capacity(req->rq_disk) ||
((block+nsect) > get_capacity(req->rq_disk))) {
printk("%s: bad access: block=%d, count=%d\n",
req->rq_disk->disk_name, block, nsect);
- end_request(req, 0);
+ hd_end_request_cur(-EIO);
goto repeat;
}
break;
default:
printk("unknown hd-command\n");
- end_request(req, 0);
+ hd_end_request_cur(-EIO);
break;
}
}
*/
static void loop_add_bio(struct loop_device *lo, struct bio *bio)
{
- if (lo->lo_biotail) {
- lo->lo_biotail->bi_next = bio;
- lo->lo_biotail = bio;
- } else
- lo->lo_bio = lo->lo_biotail = bio;
+ bio_list_add(&lo->lo_bio_list, bio);
}
/*
*/
static struct bio *loop_get_bio(struct loop_device *lo)
{
- struct bio *bio;
-
- if ((bio = lo->lo_bio)) {
- if (bio == lo->lo_biotail)
- lo->lo_biotail = NULL;
- lo->lo_bio = bio->bi_next;
- bio->bi_next = NULL;
- }
-
- return bio;
+ return bio_list_pop(&lo->lo_bio_list);
}
static int loop_make_request(struct request_queue *q, struct bio *old_bio)
set_user_nice(current, -20);
- while (!kthread_should_stop() || lo->lo_bio) {
+ while (!kthread_should_stop() || !bio_list_empty(&lo->lo_bio_list)) {
wait_event_interruptible(lo->lo_event,
- lo->lo_bio || kthread_should_stop());
+ !bio_list_empty(&lo->lo_bio_list) ||
+ kthread_should_stop());
- if (!lo->lo_bio)
+ if (bio_list_empty(&lo->lo_bio_list))
continue;
spin_lock_irq(&lo->lo_lock);
bio = loop_get_bio(lo);
if (!S_ISREG(inode->i_mode) && !S_ISBLK(inode->i_mode))
goto out_putf;
- /* new backing store needs to support loop (eg splice_read) */
- if (!inode->i_fop->splice_read)
- goto out_putf;
-
/* size of the new backing store needs to be the same */
if (get_loop_size(lo, file) != get_loop_size(lo, old_file))
goto out_putf;
error = -EINVAL;
if (S_ISREG(inode->i_mode) || S_ISBLK(inode->i_mode)) {
const struct address_space_operations *aops = mapping->a_ops;
- /*
- * If we can't read - sorry. If we only can't write - well,
- * it's going to be read-only.
- */
- if (!file->f_op->splice_read)
- goto out_putf;
+
if (aops->write_begin)
lo_flags |= LO_FLAGS_USE_AOPS;
if (!(lo_flags & LO_FLAGS_USE_AOPS) && !file->f_op->write)
lo->old_gfp_mask = mapping_gfp_mask(mapping);
mapping_set_gfp_mask(mapping, lo->old_gfp_mask & ~(__GFP_IO|__GFP_FS));
- lo->lo_bio = lo->lo_biotail = NULL;
+ bio_list_init(&lo->lo_bio_list);
/*
* set queue make_request_fn, and add limits based on lower level
#include <linux/fs.h>
#include <linux/blkdev.h>
#include <linux/hdreg.h>
-#include <linux/libata.h>
+#include <linux/ata.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
-#include <linux/mg_disk.h>
#define MG_RES_SEC (CONFIG_MG_DISK_RES << 1)
+/* name for block device */
+#define MG_DISK_NAME "mgd"
+/* name for platform device */
+#define MG_DEV_NAME "mg_disk"
+
+#define MG_DISK_MAJ 0
+#define MG_DISK_MAX_PART 16
+#define MG_SECTOR_SIZE 512
+#define MG_MAX_SECTS 256
+
+/* Register offsets */
+#define MG_BUFF_OFFSET 0x8000
+#define MG_STORAGE_BUFFER_SIZE 0x200
+#define MG_REG_OFFSET 0xC000
+#define MG_REG_FEATURE (MG_REG_OFFSET + 2) /* write case */
+#define MG_REG_ERROR (MG_REG_OFFSET + 2) /* read case */
+#define MG_REG_SECT_CNT (MG_REG_OFFSET + 4)
+#define MG_REG_SECT_NUM (MG_REG_OFFSET + 6)
+#define MG_REG_CYL_LOW (MG_REG_OFFSET + 8)
+#define MG_REG_CYL_HIGH (MG_REG_OFFSET + 0xA)
+#define MG_REG_DRV_HEAD (MG_REG_OFFSET + 0xC)
+#define MG_REG_COMMAND (MG_REG_OFFSET + 0xE) /* write case */
+#define MG_REG_STATUS (MG_REG_OFFSET + 0xE) /* read case */
+#define MG_REG_DRV_CTRL (MG_REG_OFFSET + 0x10)
+#define MG_REG_BURST_CTRL (MG_REG_OFFSET + 0x12)
+
+/* handy status */
+#define MG_STAT_READY (ATA_DRDY | ATA_DSC)
+#define MG_READY_OK(s) (((s) & (MG_STAT_READY | (ATA_BUSY | ATA_DF | \
+ ATA_ERR))) == MG_STAT_READY)
+
+/* error code for others */
+#define MG_ERR_NONE 0
+#define MG_ERR_TIMEOUT 0x100
+#define MG_ERR_INIT_STAT 0x101
+#define MG_ERR_TRANSLATION 0x102
+#define MG_ERR_CTRL_RST 0x103
+#define MG_ERR_INV_STAT 0x104
+#define MG_ERR_RSTOUT 0x105
+
+#define MG_MAX_ERRORS 6 /* Max read/write errors */
+
+/* command */
+#define MG_CMD_RD 0x20
+#define MG_CMD_WR 0x30
+#define MG_CMD_SLEEP 0x99
+#define MG_CMD_WAKEUP 0xC3
+#define MG_CMD_ID 0xEC
+#define MG_CMD_WR_CONF 0x3C
+#define MG_CMD_RD_CONF 0x40
+
+/* operation mode */
+#define MG_OP_CASCADE (1 << 0)
+#define MG_OP_CASCADE_SYNC_RD (1 << 1)
+#define MG_OP_CASCADE_SYNC_WR (1 << 2)
+#define MG_OP_INTERLEAVE (1 << 3)
+
+/* synchronous */
+#define MG_BURST_LAT_4 (3 << 4)
+#define MG_BURST_LAT_5 (4 << 4)
+#define MG_BURST_LAT_6 (5 << 4)
+#define MG_BURST_LAT_7 (6 << 4)
+#define MG_BURST_LAT_8 (7 << 4)
+#define MG_BURST_LEN_4 (1 << 1)
+#define MG_BURST_LEN_8 (2 << 1)
+#define MG_BURST_LEN_16 (3 << 1)
+#define MG_BURST_LEN_32 (4 << 1)
+#define MG_BURST_LEN_CONT (0 << 1)
+
+/* timeout value (unit: ms) */
+#define MG_TMAX_CONF_TO_CMD 1
+#define MG_TMAX_WAIT_RD_DRQ 10
+#define MG_TMAX_WAIT_WR_DRQ 500
+#define MG_TMAX_RST_TO_BUSY 10
+#define MG_TMAX_HDRST_TO_RDY 500
+#define MG_TMAX_SWRST_TO_RDY 500
+#define MG_TMAX_RSTOUT 3000
+
+/* device attribution */
+/* use mflash as boot device */
+#define MG_BOOT_DEV (1 << 0)
+/* use mflash as storage device */
+#define MG_STORAGE_DEV (1 << 1)
+/* same as MG_STORAGE_DEV, but bootloader already done reset sequence */
+#define MG_STORAGE_DEV_SKIP_RST (1 << 2)
+
+#define MG_DEV_MASK (MG_BOOT_DEV | MG_STORAGE_DEV | MG_STORAGE_DEV_SKIP_RST)
+
+/* names of GPIO resource */
+#define MG_RST_PIN "mg_rst"
+/* except MG_BOOT_DEV, reset-out pin should be assigned */
+#define MG_RSTOUT_PIN "mg_rstout"
+
+/* private driver data */
+struct mg_drv_data {
+ /* disk resource */
+ u32 use_polling;
+
+ /* device attribution */
+ u32 dev_attr;
+
+ /* internally used */
+ struct mg_host *host;
+};
+
+/* main structure for mflash driver */
+struct mg_host {
+ struct device *dev;
+
+ struct request_queue *breq;
+ struct request *req;
+ spinlock_t lock;
+ struct gendisk *gd;
+
+ struct timer_list timer;
+ void (*mg_do_intr) (struct mg_host *);
+
+ u16 id[ATA_ID_WORDS];
+
+ u16 cyls;
+ u16 heads;
+ u16 sectors;
+ u32 n_sectors;
+ u32 nres_sectors;
+
+ void __iomem *dev_base;
+ unsigned int irq;
+ unsigned int rst;
+ unsigned int rstout;
+
+ u32 major;
+ u32 error;
+};
+
+/*
+ * Debugging macro and defines
+ */
+#undef DO_MG_DEBUG
+#ifdef DO_MG_DEBUG
+# define MG_DBG(fmt, args...) \
+ printk(KERN_DEBUG "%s:%d "fmt, __func__, __LINE__, ##args)
+#else /* CONFIG_MG_DEBUG */
+# define MG_DBG(fmt, args...) do { } while (0)
+#endif /* CONFIG_MG_DEBUG */
+
static void mg_request(struct request_queue *);
+static bool mg_end_request(struct mg_host *host, int err, unsigned int nr_bytes)
+{
+ if (__blk_end_request(host->req, err, nr_bytes))
+ return true;
+
+ host->req = NULL;
+ return false;
+}
+
+static bool mg_end_request_cur(struct mg_host *host, int err)
+{
+ return mg_end_request(host, err, blk_rq_cur_bytes(host->req));
+}
+
static void mg_dump_status(const char *msg, unsigned int stat,
struct mg_host *host)
{
char *name = MG_DISK_NAME;
- struct request *req;
- if (host->breq) {
- req = elv_next_request(host->breq);
- if (req)
- name = req->rq_disk->disk_name;
- }
+ if (host->req)
+ name = host->req->rq_disk->disk_name;
printk(KERN_ERR "%s: %s: status=0x%02x { ", name, msg, stat & 0xff);
- if (stat & MG_REG_STATUS_BIT_BUSY)
+ if (stat & ATA_BUSY)
printk("Busy ");
- if (stat & MG_REG_STATUS_BIT_READY)
+ if (stat & ATA_DRDY)
printk("DriveReady ");
- if (stat & MG_REG_STATUS_BIT_WRITE_FAULT)
+ if (stat & ATA_DF)
printk("WriteFault ");
- if (stat & MG_REG_STATUS_BIT_SEEK_DONE)
+ if (stat & ATA_DSC)
printk("SeekComplete ");
- if (stat & MG_REG_STATUS_BIT_DATA_REQ)
+ if (stat & ATA_DRQ)
printk("DataRequest ");
- if (stat & MG_REG_STATUS_BIT_CORRECTED_ERROR)
+ if (stat & ATA_CORR)
printk("CorrectedError ");
- if (stat & MG_REG_STATUS_BIT_ERROR)
+ if (stat & ATA_ERR)
printk("Error ");
printk("}\n");
- if ((stat & MG_REG_STATUS_BIT_ERROR) == 0) {
+ if ((stat & ATA_ERR) == 0) {
host->error = 0;
} else {
host->error = inb((unsigned long)host->dev_base + MG_REG_ERROR);
printk(KERN_ERR "%s: %s: error=0x%02x { ", name, msg,
host->error & 0xff);
- if (host->error & MG_REG_ERR_BBK)
+ if (host->error & ATA_BBK)
printk("BadSector ");
- if (host->error & MG_REG_ERR_UNC)
+ if (host->error & ATA_UNC)
printk("UncorrectableError ");
- if (host->error & MG_REG_ERR_IDNF)
+ if (host->error & ATA_IDNF)
printk("SectorIdNotFound ");
- if (host->error & MG_REG_ERR_ABRT)
+ if (host->error & ATA_ABORTED)
printk("DriveStatusError ");
- if (host->error & MG_REG_ERR_AMNF)
+ if (host->error & ATA_AMNF)
printk("AddrMarkNotFound ");
printk("}");
- if (host->error &
- (MG_REG_ERR_BBK | MG_REG_ERR_UNC |
- MG_REG_ERR_IDNF | MG_REG_ERR_AMNF)) {
- if (host->breq) {
- req = elv_next_request(host->breq);
- if (req)
- printk(", sector=%u", (u32)req->sector);
- }
-
+ if (host->error & (ATA_BBK | ATA_UNC | ATA_IDNF | ATA_AMNF)) {
+ if (host->req)
+ printk(", sector=%u",
+ (unsigned int)blk_rq_pos(host->req));
}
printk("\n");
}
do {
cur_jiffies = jiffies;
- if (status & MG_REG_STATUS_BIT_BUSY) {
- if (expect == MG_REG_STATUS_BIT_BUSY)
+ if (status & ATA_BUSY) {
+ if (expect == ATA_BUSY)
break;
} else {
/* Check the error condition! */
- if (status & MG_REG_STATUS_BIT_ERROR) {
+ if (status & ATA_ERR) {
mg_dump_status("mg_wait", status, host);
break;
}
if (MG_READY_OK(status))
break;
- if (expect == MG_REG_STATUS_BIT_DATA_REQ)
- if (status & MG_REG_STATUS_BIT_DATA_REQ)
+ if (expect == ATA_DRQ)
+ if (status & ATA_DRQ)
break;
}
if (!msec) {
return IRQ_HANDLED;
}
+/* local copy of ata_id_string() */
+static void mg_id_string(const u16 *id, unsigned char *s,
+ unsigned int ofs, unsigned int len)
+{
+ unsigned int c;
+
+ BUG_ON(len & 1);
+
+ while (len > 0) {
+ c = id[ofs] >> 8;
+ *s = c;
+ s++;
+
+ c = id[ofs] & 0xff;
+ *s = c;
+ s++;
+
+ ofs++;
+ len -= 2;
+ }
+}
+
+/* local copy of ata_id_c_string() */
+static void mg_id_c_string(const u16 *id, unsigned char *s,
+ unsigned int ofs, unsigned int len)
+{
+ unsigned char *p;
+
+ mg_id_string(id, s, ofs, len - 1);
+
+ p = s + strnlen(s, len - 1);
+ while (p > s && p[-1] == ' ')
+ p--;
+ *p = '\0';
+}
+
static int mg_get_disk_id(struct mg_host *host)
{
u32 i;
char serial[ATA_ID_SERNO_LEN + 1];
if (!prv_data->use_polling)
- outb(MG_REG_CTRL_INTR_DISABLE,
- (unsigned long)host->dev_base +
- MG_REG_DRV_CTRL);
+ outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
outb(MG_CMD_ID, (unsigned long)host->dev_base + MG_REG_COMMAND);
- err = mg_wait(host, MG_REG_STATUS_BIT_DATA_REQ, MG_TMAX_WAIT_RD_DRQ);
+ err = mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_RD_DRQ);
if (err)
return err;
host->n_sectors -= host->nres_sectors;
}
- ata_id_c_string(id, fwrev, ATA_ID_FW_REV, sizeof(fwrev));
- ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
- ata_id_c_string(id, serial, ATA_ID_SERNO, sizeof(serial));
+ mg_id_c_string(id, fwrev, ATA_ID_FW_REV, sizeof(fwrev));
+ mg_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
+ mg_id_c_string(id, serial, ATA_ID_SERNO, sizeof(serial));
printk(KERN_INFO "mg_disk: model: %s\n", model);
printk(KERN_INFO "mg_disk: firm: %.8s\n", fwrev);
printk(KERN_INFO "mg_disk: serial: %s\n", serial);
host->n_sectors, host->nres_sectors);
if (!prv_data->use_polling)
- outb(MG_REG_CTRL_INTR_ENABLE, (unsigned long)host->dev_base +
- MG_REG_DRV_CTRL);
+ outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
return err;
}
/* hdd rst low */
gpio_set_value(host->rst, 0);
- err = mg_wait(host, MG_REG_STATUS_BIT_BUSY, MG_TMAX_RST_TO_BUSY);
+ err = mg_wait(host, ATA_BUSY, MG_TMAX_RST_TO_BUSY);
if (err)
return err;
return err;
/* soft reset on */
- outb(MG_REG_CTRL_RESET |
- (prv_data->use_polling ? MG_REG_CTRL_INTR_DISABLE :
- MG_REG_CTRL_INTR_ENABLE),
+ outb(ATA_SRST | (prv_data->use_polling ? ATA_NIEN : 0),
(unsigned long)host->dev_base + MG_REG_DRV_CTRL);
- err = mg_wait(host, MG_REG_STATUS_BIT_BUSY, MG_TMAX_RST_TO_BUSY);
+ err = mg_wait(host, ATA_BUSY, MG_TMAX_RST_TO_BUSY);
if (err)
return err;
/* soft reset off */
- outb(prv_data->use_polling ? MG_REG_CTRL_INTR_DISABLE :
- MG_REG_CTRL_INTR_ENABLE,
+ outb(prv_data->use_polling ? ATA_NIEN : 0,
(unsigned long)host->dev_base + MG_REG_DRV_CTRL);
err = mg_wait(host, MG_STAT_READY, MG_TMAX_SWRST_TO_RDY);
if (err)
static void mg_bad_rw_intr(struct mg_host *host)
{
- struct request *req = elv_next_request(host->breq);
- if (req != NULL)
- if (++req->errors >= MG_MAX_ERRORS ||
- host->error == MG_ERR_TIMEOUT)
- end_request(req, 0);
+ if (host->req)
+ if (++host->req->errors >= MG_MAX_ERRORS ||
+ host->error == MG_ERR_TIMEOUT)
+ mg_end_request_cur(host, -EIO);
}
static unsigned int mg_out(struct mg_host *host,
MG_REG_CYL_LOW);
outb((u8)(sect_num >> 16), (unsigned long)host->dev_base +
MG_REG_CYL_HIGH);
- outb((u8)((sect_num >> 24) | MG_REG_HEAD_LBA_MODE),
+ outb((u8)((sect_num >> 24) | ATA_LBA | ATA_DEVICE_OBS),
(unsigned long)host->dev_base + MG_REG_DRV_HEAD);
outb(cmd, (unsigned long)host->dev_base + MG_REG_COMMAND);
return MG_ERR_NONE;
static void mg_read(struct request *req)
{
- u32 remains, j;
+ u32 j;
struct mg_host *host = req->rq_disk->private_data;
- remains = req->nr_sectors;
-
- if (mg_out(host, req->sector, req->nr_sectors, MG_CMD_RD, NULL) !=
- MG_ERR_NONE)
+ if (mg_out(host, blk_rq_pos(req), blk_rq_sectors(req),
+ MG_CMD_RD, NULL) != MG_ERR_NONE)
mg_bad_rw_intr(host);
MG_DBG("requested %d sects (from %ld), buffer=0x%p\n",
- remains, req->sector, req->buffer);
+ blk_rq_sectors(req), blk_rq_pos(req), req->buffer);
+
+ do {
+ u16 *buff = (u16 *)req->buffer;
- while (remains) {
- if (mg_wait(host, MG_REG_STATUS_BIT_DATA_REQ,
- MG_TMAX_WAIT_RD_DRQ) != MG_ERR_NONE) {
+ if (mg_wait(host, ATA_DRQ,
+ MG_TMAX_WAIT_RD_DRQ) != MG_ERR_NONE) {
mg_bad_rw_intr(host);
return;
}
- for (j = 0; j < MG_SECTOR_SIZE >> 1; j++) {
- *(u16 *)req->buffer =
- inw((unsigned long)host->dev_base +
- MG_BUFF_OFFSET + (j << 1));
- req->buffer += 2;
- }
-
- req->sector++;
- req->errors = 0;
- remains = --req->nr_sectors;
- --req->current_nr_sectors;
-
- if (req->current_nr_sectors <= 0) {
- MG_DBG("remain : %d sects\n", remains);
- end_request(req, 1);
- if (remains > 0)
- req = elv_next_request(host->breq);
- }
+ for (j = 0; j < MG_SECTOR_SIZE >> 1; j++)
+ *buff++ = inw((unsigned long)host->dev_base +
+ MG_BUFF_OFFSET + (j << 1));
outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base +
MG_REG_COMMAND);
- }
+ } while (mg_end_request(host, 0, MG_SECTOR_SIZE));
}
static void mg_write(struct request *req)
{
- u32 remains, j;
+ u32 j;
struct mg_host *host = req->rq_disk->private_data;
- remains = req->nr_sectors;
-
- if (mg_out(host, req->sector, req->nr_sectors, MG_CMD_WR, NULL) !=
- MG_ERR_NONE) {
+ if (mg_out(host, blk_rq_pos(req), blk_rq_sectors(req),
+ MG_CMD_WR, NULL) != MG_ERR_NONE) {
mg_bad_rw_intr(host);
return;
}
-
MG_DBG("requested %d sects (from %ld), buffer=0x%p\n",
- remains, req->sector, req->buffer);
- while (remains) {
- if (mg_wait(host, MG_REG_STATUS_BIT_DATA_REQ,
- MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) {
+ blk_rq_sectors(req), blk_rq_pos(req), req->buffer);
+
+ do {
+ u16 *buff = (u16 *)req->buffer;
+
+ if (mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_WR_DRQ) != MG_ERR_NONE) {
mg_bad_rw_intr(host);
return;
}
- for (j = 0; j < MG_SECTOR_SIZE >> 1; j++) {
- outw(*(u16 *)req->buffer,
- (unsigned long)host->dev_base +
- MG_BUFF_OFFSET + (j << 1));
- req->buffer += 2;
- }
- req->sector++;
- remains = --req->nr_sectors;
- --req->current_nr_sectors;
-
- if (req->current_nr_sectors <= 0) {
- MG_DBG("remain : %d sects\n", remains);
- end_request(req, 1);
- if (remains > 0)
- req = elv_next_request(host->breq);
- }
+ for (j = 0; j < MG_SECTOR_SIZE >> 1; j++)
+ outw(*buff++, (unsigned long)host->dev_base +
+ MG_BUFF_OFFSET + (j << 1));
outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base +
MG_REG_COMMAND);
- }
+ } while (mg_end_request(host, 0, MG_SECTOR_SIZE));
}
static void mg_read_intr(struct mg_host *host)
{
+ struct request *req = host->req;
u32 i;
- struct request *req;
+ u16 *buff;
/* check status */
do {
i = inb((unsigned long)host->dev_base + MG_REG_STATUS);
- if (i & MG_REG_STATUS_BIT_BUSY)
+ if (i & ATA_BUSY)
break;
if (!MG_READY_OK(i))
break;
- if (i & MG_REG_STATUS_BIT_DATA_REQ)
+ if (i & ATA_DRQ)
goto ok_to_read;
} while (0);
mg_dump_status("mg_read_intr", i, host);
ok_to_read:
/* get current segment of request */
- req = elv_next_request(host->breq);
+ buff = (u16 *)req->buffer;
/* read 1 sector */
- for (i = 0; i < MG_SECTOR_SIZE >> 1; i++) {
- *(u16 *)req->buffer =
- inw((unsigned long)host->dev_base + MG_BUFF_OFFSET +
- (i << 1));
- req->buffer += 2;
- }
+ for (i = 0; i < MG_SECTOR_SIZE >> 1; i++)
+ *buff++ = inw((unsigned long)host->dev_base + MG_BUFF_OFFSET +
+ (i << 1));
- /* manipulate request */
MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n",
- req->sector, req->nr_sectors - 1, req->buffer);
-
- req->sector++;
- req->errors = 0;
- i = --req->nr_sectors;
- --req->current_nr_sectors;
-
- /* let know if current segment done */
- if (req->current_nr_sectors <= 0)
- end_request(req, 1);
-
- /* set handler if read remains */
- if (i > 0) {
- host->mg_do_intr = mg_read_intr;
- mod_timer(&host->timer, jiffies + 3 * HZ);
- }
+ blk_rq_pos(req), blk_rq_sectors(req) - 1, req->buffer);
/* send read confirm */
outb(MG_CMD_RD_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND);
- /* goto next request */
- if (!i)
+ if (mg_end_request(host, 0, MG_SECTOR_SIZE)) {
+ /* set handler if read remains */
+ host->mg_do_intr = mg_read_intr;
+ mod_timer(&host->timer, jiffies + 3 * HZ);
+ } else /* goto next request */
mg_request(host->breq);
}
static void mg_write_intr(struct mg_host *host)
{
+ struct request *req = host->req;
u32 i, j;
u16 *buff;
- struct request *req;
-
- /* get current segment of request */
- req = elv_next_request(host->breq);
+ bool rem;
/* check status */
do {
i = inb((unsigned long)host->dev_base + MG_REG_STATUS);
- if (i & MG_REG_STATUS_BIT_BUSY)
+ if (i & ATA_BUSY)
break;
if (!MG_READY_OK(i))
break;
- if ((req->nr_sectors <= 1) || (i & MG_REG_STATUS_BIT_DATA_REQ))
+ if ((blk_rq_sectors(req) <= 1) || (i & ATA_DRQ))
goto ok_to_write;
} while (0);
mg_dump_status("mg_write_intr", i, host);
return;
ok_to_write:
- /* manipulate request */
- req->sector++;
- i = --req->nr_sectors;
- --req->current_nr_sectors;
- req->buffer += MG_SECTOR_SIZE;
-
- /* let know if current segment or all done */
- if (!i || (req->bio && req->current_nr_sectors <= 0))
- end_request(req, 1);
-
- /* write 1 sector and set handler if remains */
- if (i > 0) {
+ if ((rem = mg_end_request(host, 0, MG_SECTOR_SIZE))) {
+ /* write 1 sector and set handler if remains */
buff = (u16 *)req->buffer;
for (j = 0; j < MG_STORAGE_BUFFER_SIZE >> 1; j++) {
outw(*buff, (unsigned long)host->dev_base +
buff++;
}
MG_DBG("sector %ld, remaining=%ld, buffer=0x%p\n",
- req->sector, req->nr_sectors, req->buffer);
+ blk_rq_pos(req), blk_rq_sectors(req), req->buffer);
host->mg_do_intr = mg_write_intr;
mod_timer(&host->timer, jiffies + 3 * HZ);
}
/* send write confirm */
outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base + MG_REG_COMMAND);
- if (!i)
+ if (!rem)
mg_request(host->breq);
}
{
struct mg_host *host = (struct mg_host *)data;
char *name;
- struct request *req;
spin_lock_irq(&host->lock);
- req = elv_next_request(host->breq);
- if (!req)
+ if (!host->req)
goto out_unlock;
host->mg_do_intr = NULL;
- name = req->rq_disk->disk_name;
+ name = host->req->rq_disk->disk_name;
printk(KERN_DEBUG "%s: timeout\n", name);
host->error = MG_ERR_TIMEOUT;
mg_bad_rw_intr(host);
- mg_request(host->breq);
out_unlock:
+ mg_request(host->breq);
spin_unlock_irq(&host->lock);
}
static void mg_request_poll(struct request_queue *q)
{
- struct request *req;
- struct mg_host *host;
+ struct mg_host *host = q->queuedata;
- while ((req = elv_next_request(q)) != NULL) {
- host = req->rq_disk->private_data;
- if (blk_fs_request(req)) {
- switch (rq_data_dir(req)) {
- case READ:
- mg_read(req);
- break;
- case WRITE:
- mg_write(req);
- break;
- default:
- printk(KERN_WARNING "%s:%d unknown command\n",
- __func__, __LINE__);
- end_request(req, 0);
+ while (1) {
+ if (!host->req) {
+ host->req = blk_fetch_request(q);
+ if (!host->req)
break;
- }
}
+
+ if (unlikely(!blk_fs_request(host->req))) {
+ mg_end_request_cur(host, -EIO);
+ continue;
+ }
+
+ if (rq_data_dir(host->req) == READ)
+ mg_read(host->req);
+ else
+ mg_write(host->req);
}
}
break;
case WRITE:
/* TODO : handler */
- outb(MG_REG_CTRL_INTR_DISABLE,
- (unsigned long)host->dev_base +
- MG_REG_DRV_CTRL);
+ outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
if (mg_out(host, sect_num, sect_cnt, MG_CMD_WR, &mg_write_intr)
!= MG_ERR_NONE) {
mg_bad_rw_intr(host);
return host->error;
}
del_timer(&host->timer);
- mg_wait(host, MG_REG_STATUS_BIT_DATA_REQ, MG_TMAX_WAIT_WR_DRQ);
- outb(MG_REG_CTRL_INTR_ENABLE, (unsigned long)host->dev_base +
- MG_REG_DRV_CTRL);
+ mg_wait(host, ATA_DRQ, MG_TMAX_WAIT_WR_DRQ);
+ outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
if (host->error) {
mg_bad_rw_intr(host);
return host->error;
outb(MG_CMD_WR_CONF, (unsigned long)host->dev_base +
MG_REG_COMMAND);
break;
- default:
- printk(KERN_WARNING "%s:%d unknown command\n",
- __func__, __LINE__);
- end_request(req, 0);
- break;
}
return MG_ERR_NONE;
}
/* This function also called from IRQ context */
static void mg_request(struct request_queue *q)
{
+ struct mg_host *host = q->queuedata;
struct request *req;
- struct mg_host *host;
u32 sect_num, sect_cnt;
while (1) {
- req = elv_next_request(q);
- if (!req)
- return;
-
- host = req->rq_disk->private_data;
+ if (!host->req) {
+ host->req = blk_fetch_request(q);
+ if (!host->req)
+ break;
+ }
+ req = host->req;
/* check unwanted request call */
if (host->mg_do_intr)
del_timer(&host->timer);
- sect_num = req->sector;
+ sect_num = blk_rq_pos(req);
/* deal whole segments */
- sect_cnt = req->nr_sectors;
+ sect_cnt = blk_rq_sectors(req);
/* sanity check */
if (sect_num >= get_capacity(req->rq_disk) ||
"%s: bad access: sector=%d, count=%d\n",
req->rq_disk->disk_name,
sect_num, sect_cnt);
- end_request(req, 0);
+ mg_end_request_cur(host, -EIO);
continue;
}
- if (!blk_fs_request(req))
- return;
+ if (unlikely(!blk_fs_request(req))) {
+ mg_end_request_cur(host, -EIO);
+ continue;
+ }
if (!mg_issue_req(req, host, sect_num, sect_cnt))
return;
return -EIO;
if (!prv_data->use_polling)
- outb(MG_REG_CTRL_INTR_DISABLE,
- (unsigned long)host->dev_base +
- MG_REG_DRV_CTRL);
+ outb(ATA_NIEN, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
outb(MG_CMD_SLEEP, (unsigned long)host->dev_base + MG_REG_COMMAND);
/* wait until mflash deep sleep */
if (mg_wait(host, MG_STAT_READY, MG_TMAX_CONF_TO_CMD)) {
if (!prv_data->use_polling)
- outb(MG_REG_CTRL_INTR_ENABLE,
- (unsigned long)host->dev_base +
- MG_REG_DRV_CTRL);
+ outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
return -EIO;
}
return -EIO;
if (!prv_data->use_polling)
- outb(MG_REG_CTRL_INTR_ENABLE, (unsigned long)host->dev_base +
- MG_REG_DRV_CTRL);
+ outb(0, (unsigned long)host->dev_base + MG_REG_DRV_CTRL);
return 0;
}
__func__, __LINE__);
goto probe_err_5;
}
+ host->breq->queuedata = host;
/* mflash is random device, thanx for the noop */
elevator_exit(host->breq->elevator);
req, error ? "failed" : "done");
spin_lock_irqsave(q->queue_lock, flags);
- __blk_end_request(req, error, req->nr_sectors << 9);
+ __blk_end_request_all(req, error);
spin_unlock_irqrestore(q->queue_lock, flags);
}
{
int result, flags;
struct nbd_request request;
- unsigned long size = req->nr_sectors << 9;
+ unsigned long size = blk_rq_bytes(req);
request.magic = htonl(NBD_REQUEST_MAGIC);
request.type = htonl(nbd_cmd(req));
- request.from = cpu_to_be64((u64) req->sector << 9);
+ request.from = cpu_to_be64((u64)blk_rq_pos(req) << 9);
request.len = htonl(size);
memcpy(request.handle, &req, sizeof(req));
- dprintk(DBG_TX, "%s: request %p: sending control (%s@%llu,%luB)\n",
+ dprintk(DBG_TX, "%s: request %p: sending control (%s@%llu,%uB)\n",
lo->disk->disk_name, req,
nbdcmd_to_ascii(nbd_cmd(req)),
- (unsigned long long)req->sector << 9,
- req->nr_sectors << 9);
+ (unsigned long long)blk_rq_pos(req) << 9,
+ blk_rq_bytes(req));
result = sock_xmit(lo, 1, &request, sizeof(request),
(nbd_cmd(req) == NBD_CMD_WRITE) ? MSG_MORE : 0);
if (result <= 0) {
{
struct request *req;
- while ((req = elv_next_request(q)) != NULL) {
+ while ((req = blk_fetch_request(q)) != NULL) {
struct nbd_device *lo;
- blkdev_dequeue_request(req);
-
spin_unlock_irq(q->queue_lock);
dprintk(DBG_BLKDEV, "%s: request %p: dequeued (flags=%x)\n",
blk_rq_init(NULL, &sreq);
sreq.cmd_type = REQ_TYPE_SPECIAL;
nbd_cmd(&sreq) = NBD_CMD_DISC;
- /*
- * Set these to sane values in case server implementation
- * fails to check the request type first and also to keep
- * debugging output cleaner.
- */
- sreq.sector = 0;
- sreq.nr_sectors = 0;
if (!lo->sock)
return -EINVAL;
nbd_send_req(lo, &sreq);
if (pcd_busy)
return;
while (1) {
- pcd_req = elv_next_request(q);
- if (!pcd_req)
- return;
+ if (!pcd_req) {
+ pcd_req = blk_fetch_request(q);
+ if (!pcd_req)
+ return;
+ }
if (rq_data_dir(pcd_req) == READ) {
struct pcd_unit *cd = pcd_req->rq_disk->private_data;
if (cd != pcd_current)
pcd_bufblk = -1;
pcd_current = cd;
- pcd_sector = pcd_req->sector;
- pcd_count = pcd_req->current_nr_sectors;
+ pcd_sector = blk_rq_pos(pcd_req);
+ pcd_count = blk_rq_cur_sectors(pcd_req);
pcd_buf = pcd_req->buffer;
pcd_busy = 1;
ps_set_intr(do_pcd_read, NULL, 0, nice);
return;
- } else
- end_request(pcd_req, 0);
+ } else {
+ __blk_end_request_all(pcd_req, -EIO);
+ pcd_req = NULL;
+ }
}
}
-static inline void next_request(int success)
+static inline void next_request(int err)
{
unsigned long saved_flags;
spin_lock_irqsave(&pcd_lock, saved_flags);
- end_request(pcd_req, success);
+ if (!__blk_end_request_cur(pcd_req, err))
+ pcd_req = NULL;
pcd_busy = 0;
do_pcd_request(pcd_queue);
spin_unlock_irqrestore(&pcd_lock, saved_flags);
if (pcd_command(pcd_current, rd_cmd, 2048, "read block")) {
pcd_bufblk = -1;
- next_request(0);
+ next_request(-EIO);
return;
}
pcd_retries = 0;
pcd_transfer();
if (!pcd_count) {
- next_request(1);
+ next_request(0);
return;
}
return;
}
pcd_bufblk = -1;
- next_request(0);
+ next_request(-EIO);
return;
}
pd_claimed = 0;
phase = NULL;
spin_lock_irqsave(&pd_lock, saved_flags);
- end_request(pd_req, res);
- pd_req = elv_next_request(pd_queue);
- if (!pd_req)
- stop = 1;
+ if (!__blk_end_request_cur(pd_req,
+ res == Ok ? 0 : -EIO)) {
+ pd_req = blk_fetch_request(pd_queue);
+ if (!pd_req)
+ stop = 1;
+ }
spin_unlock_irqrestore(&pd_lock, saved_flags);
if (stop)
return;
pd_cmd = rq_data_dir(pd_req);
if (pd_cmd == READ || pd_cmd == WRITE) {
- pd_block = pd_req->sector;
- pd_count = pd_req->current_nr_sectors;
+ pd_block = blk_rq_pos(pd_req);
+ pd_count = blk_rq_cur_sectors(pd_req);
if (pd_block + pd_count > get_capacity(pd_req->rq_disk))
return Fail;
- pd_run = pd_req->nr_sectors;
+ pd_run = blk_rq_sectors(pd_req);
pd_buf = pd_req->buffer;
pd_retries = 0;
if (pd_cmd == READ)
if (pd_count)
return 0;
spin_lock_irqsave(&pd_lock, saved_flags);
- end_request(pd_req, 1);
- pd_count = pd_req->current_nr_sectors;
+ __blk_end_request_cur(pd_req, 0);
+ pd_count = blk_rq_cur_sectors(pd_req);
pd_buf = pd_req->buffer;
spin_unlock_irqrestore(&pd_lock, saved_flags);
return 0;
{
if (pd_req)
return;
- pd_req = elv_next_request(q);
+ pd_req = blk_fetch_request(q);
if (!pd_req)
return;
static struct request_queue *pf_queue;
-static void pf_end_request(int uptodate)
+static void pf_end_request(int err)
{
- if (pf_req) {
- end_request(pf_req, uptodate);
+ if (pf_req && !__blk_end_request_cur(pf_req, err))
pf_req = NULL;
- }
}
static void do_pf_request(struct request_queue * q)
if (pf_busy)
return;
repeat:
- pf_req = elv_next_request(q);
- if (!pf_req)
- return;
+ if (!pf_req) {
+ pf_req = blk_fetch_request(q);
+ if (!pf_req)
+ return;
+ }
pf_current = pf_req->rq_disk->private_data;
- pf_block = pf_req->sector;
- pf_run = pf_req->nr_sectors;
- pf_count = pf_req->current_nr_sectors;
+ pf_block = blk_rq_pos(pf_req);
+ pf_run = blk_rq_sectors(pf_req);
+ pf_count = blk_rq_cur_sectors(pf_req);
if (pf_block + pf_count > get_capacity(pf_req->rq_disk)) {
- pf_end_request(0);
+ pf_end_request(-EIO);
goto repeat;
}
pi_do_claimed(pf_current->pi, do_pf_write);
else {
pf_busy = 0;
- pf_end_request(0);
+ pf_end_request(-EIO);
goto repeat;
}
}
return 1;
if (!pf_count) {
spin_lock_irqsave(&pf_spin_lock, saved_flags);
- pf_end_request(1);
- pf_req = elv_next_request(pf_queue);
+ pf_end_request(0);
spin_unlock_irqrestore(&pf_spin_lock, saved_flags);
if (!pf_req)
return 1;
- pf_count = pf_req->current_nr_sectors;
+ pf_count = blk_rq_cur_sectors(pf_req);
pf_buf = pf_req->buffer;
}
return 0;
}
-static inline void next_request(int success)
+static inline void next_request(int err)
{
unsigned long saved_flags;
spin_lock_irqsave(&pf_spin_lock, saved_flags);
- pf_end_request(success);
+ pf_end_request(err);
pf_busy = 0;
do_pf_request(pf_queue);
spin_unlock_irqrestore(&pf_spin_lock, saved_flags);
pi_do_claimed(pf_current->pi, do_pf_read_start);
return;
}
- next_request(0);
+ next_request(-EIO);
return;
}
pf_mask = STAT_DRQ;
pi_do_claimed(pf_current->pi, do_pf_read_start);
return;
}
- next_request(0);
+ next_request(-EIO);
return;
}
pi_read_block(pf_current->pi, pf_buf, 512);
break;
}
pi_disconnect(pf_current->pi);
- next_request(1);
+ next_request(0);
}
static void do_pf_write(void)
pi_do_claimed(pf_current->pi, do_pf_write_start);
return;
}
- next_request(0);
+ next_request(-EIO);
return;
}
pi_do_claimed(pf_current->pi, do_pf_write_start);
return;
}
- next_request(0);
+ next_request(-EIO);
return;
}
pi_write_block(pf_current->pi, pf_buf, 512);
pi_do_claimed(pf_current->pi, do_pf_write_start);
return;
}
- next_request(0);
+ next_request(-EIO);
return;
}
pi_disconnect(pf_current->pi);
- next_request(1);
+ next_request(0);
}
static int __init pf_init(void)
rq_for_each_segment(bv, req, iter)
n++;
dev_dbg(&dev->sbd.core,
- "%s:%u: %s req has %u bvecs for %lu sectors %lu hard sectors\n",
- __func__, __LINE__, op, n, req->nr_sectors,
- req->hard_nr_sectors);
+ "%s:%u: %s req has %u bvecs for %u sectors\n",
+ __func__, __LINE__, op, n, blk_rq_sectors(req));
#endif
- start_sector = req->sector * priv->blocking_factor;
- sectors = req->nr_sectors * priv->blocking_factor;
+ start_sector = blk_rq_pos(req) * priv->blocking_factor;
+ sectors = blk_rq_sectors(req) * priv->blocking_factor;
dev_dbg(&dev->sbd.core, "%s:%u: %s %llu sectors starting at %llu\n",
__func__, __LINE__, op, sectors, start_sector);
if (res) {
dev_err(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__,
__LINE__, op, res);
- end_request(req, 0);
+ __blk_end_request_all(req, -EIO);
return 0;
}
if (res) {
dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n",
__func__, __LINE__, res);
- end_request(req, 0);
+ __blk_end_request_all(req, -EIO);
return 0;
}
dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
- while ((req = elv_next_request(q))) {
+ while ((req = blk_fetch_request(q))) {
if (blk_fs_request(req)) {
if (ps3disk_submit_request_sg(dev, req))
break;
break;
} else {
blk_dump_rq_flags(req, DEVICE_NAME " bad request");
- end_request(req, 0);
+ __blk_end_request_all(req, -EIO);
continue;
}
}
struct request *req;
int res, read, error;
u64 tag, status;
- unsigned long num_sectors;
const char *op;
res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
if (req->cmd_type == REQ_TYPE_LINUX_BLOCK &&
req->cmd[0] == REQ_LB_OP_FLUSH) {
read = 0;
- num_sectors = req->hard_cur_sectors;
op = "flush";
} else {
read = !rq_data_dir(req);
- num_sectors = req->nr_sectors;
op = read ? "read" : "write";
}
if (status) {
}
spin_lock(&priv->lock);
- __blk_end_request(req, error, num_sectors << 9);
+ __blk_end_request_all(req, error);
priv->req = NULL;
ps3disk_do_request(dev, priv->queue);
spin_unlock(&priv->lock);
vdc_finish(&port->vio, -err, WAITING_FOR_GEN_CMD);
}
-static void vdc_end_request(struct request *req, int error, int num_sectors)
-{
- __blk_end_request(req, error, num_sectors << 9);
-}
-
static void vdc_end_one(struct vdc_port *port, struct vio_dring_state *dr,
unsigned int index)
{
rqe->req = NULL;
- vdc_end_request(req, (desc->status ? -EIO : 0), desc->size >> 9);
+ __blk_end_request(req, (desc->status ? -EIO : 0), desc->size);
if (blk_queue_stopped(port->disk->queue))
blk_start_queue(port->disk->queue);
desc->slice = 0;
}
desc->status = ~0;
- desc->offset = (req->sector << 9) / port->vdisk_block_size;
+ desc->offset = (blk_rq_pos(req) << 9) / port->vdisk_block_size;
desc->size = len;
desc->ncookies = err;
static void do_vdc_request(struct request_queue *q)
{
while (1) {
- struct request *req = elv_next_request(q);
+ struct request *req = blk_fetch_request(q);
if (!req)
break;
- blkdev_dequeue_request(req);
if (__send_request(req) < 0)
- vdc_end_request(req, -EIO, req->hard_nr_sectors);
+ __blk_end_request_all(req, -EIO);
}
}
ret = swim_read_sector(fs, side, track, sector,
buffer);
if (try-- == 0)
- return -1;
+ return -EIO;
} while (ret != 512);
buffer += ret;
struct request *req;
struct floppy_state *fs;
- while ((req = elv_next_request(q))) {
+ req = blk_fetch_request(q);
+ while (req) {
+ int err = -EIO;
fs = req->rq_disk->private_data;
- if (req->sector < 0 || req->sector >= fs->total_secs) {
- end_request(req, 0);
- continue;
- }
- if (req->current_nr_sectors == 0) {
- end_request(req, 1);
- continue;
- }
- if (!fs->disk_in) {
- end_request(req, 0);
- continue;
- }
- if (rq_data_dir(req) == WRITE) {
- if (fs->write_protected) {
- end_request(req, 0);
- continue;
- }
- }
+ if (blk_rq_pos(req) >= fs->total_secs)
+ goto done;
+ if (!fs->disk_in)
+ goto done;
+ if (rq_data_dir(req) == WRITE && fs->write_protected)
+ goto done;
+
switch (rq_data_dir(req)) {
case WRITE:
/* NOT IMPLEMENTED */
- end_request(req, 0);
break;
case READ:
- if (floppy_read_sectors(fs, req->sector,
- req->current_nr_sectors,
- req->buffer)) {
- end_request(req, 0);
- continue;
- }
- req->nr_sectors -= req->current_nr_sectors;
- req->sector += req->current_nr_sectors;
- req->buffer += req->current_nr_sectors * 512;
- end_request(req, 1);
+ err = floppy_read_sectors(fs, blk_rq_pos(req),
+ blk_rq_cur_sectors(req),
+ req->buffer);
break;
}
+ done:
+ if (!__blk_end_request_cur(req, err))
+ req = blk_fetch_request(q);
}
}
static int floppy_check_change(struct gendisk *disk);
static int floppy_revalidate(struct gendisk *disk);
+static bool swim3_end_request(int err, unsigned int nr_bytes)
+{
+ if (__blk_end_request(fd_req, err, nr_bytes))
+ return true;
+
+ fd_req = NULL;
+ return false;
+}
+
+static bool swim3_end_request_cur(int err)
+{
+ return swim3_end_request(err, blk_rq_cur_bytes(fd_req));
+}
+
static void swim3_select(struct floppy_state *fs, int sel)
{
struct swim3 __iomem *sw = fs->swim3;
wake_up(&fs->wait);
return;
}
- while (fs->state == idle && (req = elv_next_request(swim3_queue))) {
+ while (fs->state == idle) {
+ if (!fd_req) {
+ fd_req = blk_fetch_request(swim3_queue);
+ if (!fd_req)
+ break;
+ }
+ req = fd_req;
#if 0
- printk("do_fd_req: dev=%s cmd=%d sec=%ld nr_sec=%ld buf=%p\n",
+ printk("do_fd_req: dev=%s cmd=%d sec=%ld nr_sec=%u buf=%p\n",
req->rq_disk->disk_name, req->cmd,
- (long)req->sector, req->nr_sectors, req->buffer);
- printk(" errors=%d current_nr_sectors=%ld\n",
- req->errors, req->current_nr_sectors);
+ (long)blk_rq_pos(req), blk_rq_sectors(req), req->buffer);
+ printk(" errors=%d current_nr_sectors=%u\n",
+ req->errors, blk_rq_cur_sectors(req));
#endif
- if (req->sector < 0 || req->sector >= fs->total_secs) {
- end_request(req, 0);
- continue;
- }
- if (req->current_nr_sectors == 0) {
- end_request(req, 1);
+ if (blk_rq_pos(req) >= fs->total_secs) {
+ swim3_end_request_cur(-EIO);
continue;
}
if (fs->ejected) {
- end_request(req, 0);
+ swim3_end_request_cur(-EIO);
continue;
}
if (fs->write_prot < 0)
fs->write_prot = swim3_readbit(fs, WRITE_PROT);
if (fs->write_prot) {
- end_request(req, 0);
+ swim3_end_request_cur(-EIO);
continue;
}
}
- /* Do not remove the cast. req->sector is now a sector_t and
- * can be 64 bits, but it will never go past 32 bits for this
- * driver anyway, so we can safely cast it down and not have
- * to do a 64/32 division
+ /* Do not remove the cast. blk_rq_pos(req) is now a
+ * sector_t and can be 64 bits, but it will never go
+ * past 32 bits for this driver anyway, so we can
+ * safely cast it down and not have to do a 64/32
+ * division
*/
- fs->req_cyl = ((long)req->sector) / fs->secpercyl;
- x = ((long)req->sector) % fs->secpercyl;
+ fs->req_cyl = ((long)blk_rq_pos(req)) / fs->secpercyl;
+ x = ((long)blk_rq_pos(req)) % fs->secpercyl;
fs->head = x / fs->secpertrack;
fs->req_sector = x % fs->secpertrack + 1;
fd_req = req;
struct dbdma_cmd *cp = fs->dma_cmd;
struct dbdma_regs __iomem *dr = fs->dma;
- if (fd_req->current_nr_sectors <= 0) {
+ if (blk_rq_cur_sectors(fd_req) <= 0) {
printk(KERN_ERR "swim3: transfer 0 sectors?\n");
return;
}
n = 1;
else {
n = fs->secpertrack - fs->req_sector + 1;
- if (n > fd_req->current_nr_sectors)
- n = fd_req->current_nr_sectors;
+ if (n > blk_rq_cur_sectors(fd_req))
+ n = blk_rq_cur_sectors(fd_req);
}
fs->scount = n;
swim3_select(fs, fs->head? READ_DATA_1: READ_DATA_0);
case do_transfer:
if (fs->cur_cyl != fs->req_cyl) {
if (fs->retries > 5) {
- end_request(fd_req, 0);
+ swim3_end_request_cur(-EIO);
fs->state = idle;
return;
}
out_8(&sw->intr_enable, 0);
fs->cur_cyl = -1;
if (fs->retries > 5) {
- end_request(fd_req, 0);
+ swim3_end_request_cur(-EIO);
fs->state = idle;
start_request(fs);
} else {
out_8(&sw->select, RELAX);
out_8(&sw->intr_enable, 0);
printk(KERN_ERR "swim3: seek timeout\n");
- end_request(fd_req, 0);
+ swim3_end_request_cur(-EIO);
fs->state = idle;
start_request(fs);
}
return;
}
printk(KERN_ERR "swim3: seek settle timeout\n");
- end_request(fd_req, 0);
+ swim3_end_request_cur(-EIO);
fs->state = idle;
start_request(fs);
}
struct floppy_state *fs = (struct floppy_state *) data;
struct swim3 __iomem *sw = fs->swim3;
struct dbdma_regs __iomem *dr = fs->dma;
- struct dbdma_cmd *cp = fs->dma_cmd;
- unsigned long s;
int n;
fs->timeout_pending = 0;
out_8(&sw->intr_enable, 0);
out_8(&sw->control_bic, WRITE_SECTORS | DO_ACTION);
out_8(&sw->select, RELAX);
- if (rq_data_dir(fd_req) == WRITE)
- ++cp;
- if (ld_le16(&cp->xfer_status) != 0)
- s = fs->scount - ((ld_le16(&cp->res_count) + 511) >> 9);
- else
- s = 0;
- fd_req->sector += s;
- fd_req->current_nr_sectors -= s;
printk(KERN_ERR "swim3: timeout %sing sector %ld\n",
- (rq_data_dir(fd_req)==WRITE? "writ": "read"), (long)fd_req->sector);
- end_request(fd_req, 0);
+ (rq_data_dir(fd_req)==WRITE? "writ": "read"),
+ (long)blk_rq_pos(fd_req));
+ swim3_end_request_cur(-EIO);
fs->state = idle;
start_request(fs);
}
printk(KERN_ERR "swim3: seen sector but cyl=ff?\n");
fs->cur_cyl = -1;
if (fs->retries > 5) {
- end_request(fd_req, 0);
+ swim3_end_request_cur(-EIO);
fs->state = idle;
start_request(fs);
} else {
if (intr & ERROR_INTR) {
n = fs->scount - 1 - resid / 512;
if (n > 0) {
- fd_req->sector += n;
- fd_req->current_nr_sectors -= n;
- fd_req->buffer += n * 512;
+ blk_update_request(fd_req, 0, n << 9);
fs->req_sector += n;
}
if (fs->retries < 5) {
} else {
printk("swim3: error %sing block %ld (err=%x)\n",
rq_data_dir(fd_req) == WRITE? "writ": "read",
- (long)fd_req->sector, err);
- end_request(fd_req, 0);
+ (long)blk_rq_pos(fd_req), err);
+ swim3_end_request_cur(-EIO);
fs->state = idle;
}
} else {
printk(KERN_ERR "swim3: fd dma: stat=%x resid=%d\n", stat, resid);
printk(KERN_ERR " state=%d, dir=%x, intr=%x, err=%x\n",
fs->state, rq_data_dir(fd_req), intr, err);
- end_request(fd_req, 0);
+ swim3_end_request_cur(-EIO);
fs->state = idle;
start_request(fs);
break;
}
- fd_req->sector += fs->scount;
- fd_req->current_nr_sectors -= fs->scount;
- fd_req->buffer += fs->scount * 512;
- if (fd_req->current_nr_sectors <= 0) {
- end_request(fd_req, 1);
- fs->state = idle;
- } else {
+ if (swim3_end_request(0, fs->scount << 9)) {
fs->req_sector += fs->scount;
if (fs->req_sector > fs->secpertrack) {
fs->req_sector -= fs->secpertrack;
}
}
act(fs);
- }
+ } else
+ fs->state = idle;
}
if (fs->state == idle)
start_request(fs);
struct request *req = crq->rq;
int rc;
- rc = __blk_end_request(req, error, blk_rq_bytes(req));
- assert(rc == 0);
+ __blk_end_request_all(req, error);
rc = carm_put_request(host, crq);
assert(rc == 0);
while (1) {
DPRINTK("get req\n");
- rq = elv_next_request(q);
+ rq = blk_fetch_request(q);
if (!rq)
break;
- blkdev_dequeue_request(rq);
-
crq = rq->special;
assert(crq != NULL);
assert(crq->rq == rq);
queue_one_request:
VPRINTK("get req\n");
- rq = elv_next_request(q);
+ rq = blk_peek_request(q);
if (!rq)
return;
}
crq->rq = rq;
- blkdev_dequeue_request(rq);
+ blk_start_request(rq);
if (rq_data_dir(rq) == WRITE) {
writing = 1;
msg->sg_count = n_elem;
msg->sg_type = SGT_32BIT;
msg->handle = cpu_to_le32(TAG_ENCODE(crq->tag));
- msg->lba = cpu_to_le32(rq->sector & 0xffffffff);
- tmp = (rq->sector >> 16) >> 16;
+ msg->lba = cpu_to_le32(blk_rq_pos(rq) & 0xffffffff);
+ tmp = (blk_rq_pos(rq) >> 16) >> 16;
msg->lba_high = cpu_to_le16( (u16) tmp );
- msg->lba_count = cpu_to_le16(rq->nr_sectors);
+ msg->lba_count = cpu_to_le16(blk_rq_sectors(rq));
msg_size = sizeof(struct carm_msg_rw) - sizeof(msg->sg);
for (i = 0; i < n_elem; i++) {
static void ub_cmd_build_packet(struct ub_dev *sc, struct ub_lun *lun,
struct ub_scsi_cmd *cmd, struct ub_request *urq);
static void ub_rw_cmd_done(struct ub_dev *sc, struct ub_scsi_cmd *cmd);
-static void ub_end_rq(struct request *rq, unsigned int status,
- unsigned int cmd_len);
+static void ub_end_rq(struct request *rq, unsigned int status);
static int ub_rw_cmd_retry(struct ub_dev *sc, struct ub_lun *lun,
struct ub_request *urq, struct ub_scsi_cmd *cmd);
static int ub_submit_scsi(struct ub_dev *sc, struct ub_scsi_cmd *cmd);
struct ub_lun *lun = q->queuedata;
struct request *rq;
- while ((rq = elv_next_request(q)) != NULL) {
+ while ((rq = blk_peek_request(q)) != NULL) {
if (ub_request_fn_1(lun, rq) != 0) {
blk_stop_queue(q);
break;
int n_elem;
if (atomic_read(&sc->poison)) {
- blkdev_dequeue_request(rq);
- ub_end_rq(rq, DID_NO_CONNECT << 16, blk_rq_bytes(rq));
+ blk_start_request(rq);
+ ub_end_rq(rq, DID_NO_CONNECT << 16);
return 0;
}
if (lun->changed && !blk_pc_request(rq)) {
- blkdev_dequeue_request(rq);
- ub_end_rq(rq, SAM_STAT_CHECK_CONDITION, blk_rq_bytes(rq));
+ blk_start_request(rq);
+ ub_end_rq(rq, SAM_STAT_CHECK_CONDITION);
return 0;
}
return -1;
memset(cmd, 0, sizeof(struct ub_scsi_cmd));
- blkdev_dequeue_request(rq);
+ blk_start_request(rq);
urq = &lun->urq;
memset(urq, 0, sizeof(struct ub_request));
drop:
ub_put_cmd(lun, cmd);
- ub_end_rq(rq, DID_ERROR << 16, blk_rq_bytes(rq));
+ ub_end_rq(rq, DID_ERROR << 16);
return 0;
}
* The call to blk_queue_hardsect_size() guarantees that request
* is aligned, but it is given in terms of 512 byte units, always.
*/
- block = rq->sector >> lun->capacity.bshift;
- nblks = rq->nr_sectors >> lun->capacity.bshift;
+ block = blk_rq_pos(rq) >> lun->capacity.bshift;
+ nblks = blk_rq_sectors(rq) >> lun->capacity.bshift;
cmd->cdb[0] = (cmd->dir == UB_DIR_READ)? READ_10: WRITE_10;
/* 10-byte uses 4 bytes of LBA: 2147483648KB, 2097152MB, 2048GB */
cmd->cdb[8] = nblks;
cmd->cdb_len = 10;
- cmd->len = rq->nr_sectors * 512;
+ cmd->len = blk_rq_bytes(rq);
}
static void ub_cmd_build_packet(struct ub_dev *sc, struct ub_lun *lun,
{
struct request *rq = urq->rq;
- if (rq->data_len == 0) {
+ if (blk_rq_bytes(rq) == 0) {
cmd->dir = UB_DIR_NONE;
} else {
if (rq_data_dir(rq) == WRITE)
memcpy(&cmd->cdb, rq->cmd, rq->cmd_len);
cmd->cdb_len = rq->cmd_len;
- cmd->len = rq->data_len;
+ cmd->len = blk_rq_bytes(rq);
/*
* To reapply this to every URB is not as incorrect as it looks.
struct ub_request *urq = cmd->back;
struct request *rq;
unsigned int scsi_status;
- unsigned int cmd_len;
rq = urq->rq;
if (cmd->error == 0) {
if (blk_pc_request(rq)) {
- if (cmd->act_len >= rq->data_len)
- rq->data_len = 0;
+ if (cmd->act_len >= rq->resid_len)
+ rq->resid_len = 0;
else
- rq->data_len -= cmd->act_len;
+ rq->resid_len -= cmd->act_len;
scsi_status = 0;
} else {
if (cmd->act_len != cmd->len) {
urq->rq = NULL;
- cmd_len = cmd->len;
ub_put_cmd(lun, cmd);
- ub_end_rq(rq, scsi_status, cmd_len);
+ ub_end_rq(rq, scsi_status);
blk_start_queue(lun->disk->queue);
}
-static void ub_end_rq(struct request *rq, unsigned int scsi_status,
- unsigned int cmd_len)
+static void ub_end_rq(struct request *rq, unsigned int scsi_status)
{
int error;
- long rqlen;
if (scsi_status == 0) {
error = 0;
error = -EIO;
rq->errors = scsi_status;
}
- rqlen = blk_rq_bytes(rq); /* Oddly enough, this is the residue. */
- if (__blk_end_request(rq, error, cmd_len)) {
- printk(KERN_WARNING DRV_NAME
- ": __blk_end_request blew, %s-cmd total %u rqlen %ld\n",
- blk_pc_request(rq)? "pc": "fs", cmd_len, rqlen);
- }
+ __blk_end_request_all(rq, error);
}
static int ub_rw_cmd_retry(struct ub_dev *sc, struct ub_lun *lun,
struct viodasd_device *d;
unsigned long flags;
- start = (u64)req->sector << 9;
+ start = (u64)blk_rq_pos(req) << 9;
if (rq_data_dir(req) == READ) {
direction = DMA_FROM_DEVICE;
* back later.
*/
while (num_req_outstanding < VIOMAXREQ) {
- req = elv_next_request(q);
+ req = blk_fetch_request(q);
if (req == NULL)
return;
- /* dequeue the current request from the queue */
- blkdev_dequeue_request(req);
/* check that request contains a valid command */
if (!blk_fs_request(req)) {
- viodasd_end_request(req, -EIO, req->hard_nr_sectors);
+ viodasd_end_request(req, -EIO, blk_rq_sectors(req));
continue;
}
/* Try sending the request */
if (send_request(req) != 0)
- viodasd_end_request(req, -EIO, req->hard_nr_sectors);
+ viodasd_end_request(req, -EIO, blk_rq_sectors(req));
}
}
err = vio_lookup_rc(viodasd_err_table, bevent->sub_result);
printk(VIOD_KERN_WARNING "read/write error %d:0x%04x (%s)\n",
event->xRc, bevent->sub_result, err->msg);
- num_sect = req->hard_nr_sectors;
+ num_sect = blk_rq_sectors(req);
}
qlock = req->q->queue_lock;
spin_lock_irqsave(qlock, irq_flags);
struct list_head list;
struct request *req;
struct virtio_blk_outhdr out_hdr;
+ struct virtio_scsi_inhdr in_hdr;
u8 status;
};
spin_lock_irqsave(&vblk->lock, flags);
while ((vbr = vblk->vq->vq_ops->get_buf(vblk->vq, &len)) != NULL) {
int error;
+
switch (vbr->status) {
case VIRTIO_BLK_S_OK:
error = 0;
break;
}
- __blk_end_request(vbr->req, error, blk_rq_bytes(vbr->req));
+ if (blk_pc_request(vbr->req)) {
+ vbr->req->resid_len = vbr->in_hdr.residual;
+ vbr->req->sense_len = vbr->in_hdr.sense_len;
+ vbr->req->errors = vbr->in_hdr.errors;
+ }
+
+ __blk_end_request_all(vbr->req, error);
list_del(&vbr->list);
mempool_free(vbr, vblk->pool);
}
static bool do_req(struct request_queue *q, struct virtio_blk *vblk,
struct request *req)
{
- unsigned long num, out, in;
+ unsigned long num, out = 0, in = 0;
struct virtblk_req *vbr;
vbr = mempool_alloc(vblk->pool, GFP_ATOMIC);
vbr->req = req;
if (blk_fs_request(vbr->req)) {
vbr->out_hdr.type = 0;
- vbr->out_hdr.sector = vbr->req->sector;
+ vbr->out_hdr.sector = blk_rq_pos(vbr->req);
vbr->out_hdr.ioprio = req_get_ioprio(vbr->req);
} else if (blk_pc_request(vbr->req)) {
vbr->out_hdr.type = VIRTIO_BLK_T_SCSI_CMD;
if (blk_barrier_rq(vbr->req))
vbr->out_hdr.type |= VIRTIO_BLK_T_BARRIER;
- sg_set_buf(&vblk->sg[0], &vbr->out_hdr, sizeof(vbr->out_hdr));
- num = blk_rq_map_sg(q, vbr->req, vblk->sg+1);
- sg_set_buf(&vblk->sg[num+1], &vbr->status, sizeof(vbr->status));
+ sg_set_buf(&vblk->sg[out++], &vbr->out_hdr, sizeof(vbr->out_hdr));
- if (rq_data_dir(vbr->req) == WRITE) {
- vbr->out_hdr.type |= VIRTIO_BLK_T_OUT;
- out = 1 + num;
- in = 1;
- } else {
- vbr->out_hdr.type |= VIRTIO_BLK_T_IN;
- out = 1;
- in = 1 + num;
+ /*
+ * If this is a packet command we need a couple of additional headers.
+ * Behind the normal outhdr we put a segment with the scsi command
+ * block, and before the normal inhdr we put the sense data and the
+ * inhdr with additional status information before the normal inhdr.
+ */
+ if (blk_pc_request(vbr->req))
+ sg_set_buf(&vblk->sg[out++], vbr->req->cmd, vbr->req->cmd_len);
+
+ num = blk_rq_map_sg(q, vbr->req, vblk->sg + out);
+
+ if (blk_pc_request(vbr->req)) {
+ sg_set_buf(&vblk->sg[num + out + in++], vbr->req->sense, 96);
+ sg_set_buf(&vblk->sg[num + out + in++], &vbr->in_hdr,
+ sizeof(vbr->in_hdr));
+ }
+
+ sg_set_buf(&vblk->sg[num + out + in++], &vbr->status,
+ sizeof(vbr->status));
+
+ if (num) {
+ if (rq_data_dir(vbr->req) == WRITE) {
+ vbr->out_hdr.type |= VIRTIO_BLK_T_OUT;
+ out += num;
+ } else {
+ vbr->out_hdr.type |= VIRTIO_BLK_T_IN;
+ in += num;
+ }
}
if (vblk->vq->vq_ops->add_buf(vblk->vq, vblk->sg, out, in, vbr)) {
static void do_virtblk_request(struct request_queue *q)
{
- struct virtio_blk *vblk = NULL;
+ struct virtio_blk *vblk = q->queuedata;
struct request *req;
unsigned int issued = 0;
- while ((req = elv_next_request(q)) != NULL) {
- vblk = req->rq_disk->private_data;
+ while ((req = blk_peek_request(q)) != NULL) {
BUG_ON(req->nr_phys_segments + 2 > vblk->sg_elems);
/* If this request fails, stop queue and wait for something to
blk_stop_queue(q);
break;
}
- blkdev_dequeue_request(req);
+ blk_start_request(req);
issued++;
}
static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,
unsigned cmd, unsigned long data)
{
- return scsi_cmd_ioctl(bdev->bd_disk->queue,
- bdev->bd_disk, mode, cmd,
+ struct gendisk *disk = bdev->bd_disk;
+ struct virtio_blk *vblk = disk->private_data;
+
+ /*
+ * Only allow the generic SCSI ioctls if the host can support it.
+ */
+ if (!virtio_has_feature(vblk->vdev, VIRTIO_BLK_F_SCSI))
+ return -ENOIOCTLCMD;
+
+ return scsi_cmd_ioctl(disk->queue, disk, mode, cmd,
(void __user *)data);
}
goto out_put_disk;
}
+ vblk->disk->queue->queuedata = vblk;
queue_flag_set_unlocked(QUEUE_FLAG_VIRT, vblk->disk->queue);
if (index < 26) {
static unsigned int features[] = {
VIRTIO_BLK_F_BARRIER, VIRTIO_BLK_F_SEG_MAX, VIRTIO_BLK_F_SIZE_MAX,
VIRTIO_BLK_F_GEOMETRY, VIRTIO_BLK_F_RO, VIRTIO_BLK_F_BLK_SIZE,
+ VIRTIO_BLK_F_SCSI,
};
static struct virtio_driver virtio_blk = {
if (xdc_busy)
return;
- while ((req = elv_next_request(q)) != NULL) {
- unsigned block = req->sector;
- unsigned count = req->nr_sectors;
- int rw = rq_data_dir(req);
+ req = blk_fetch_request(q);
+ while (req) {
+ unsigned block = blk_rq_pos(req);
+ unsigned count = blk_rq_cur_sectors(req);
XD_INFO *disk = req->rq_disk->private_data;
- int res = 0;
+ int res = -EIO;
int retry;
- if (!blk_fs_request(req)) {
- end_request(req, 0);
- continue;
- }
- if (block + count > get_capacity(req->rq_disk)) {
- end_request(req, 0);
- continue;
- }
- if (rw != READ && rw != WRITE) {
- printk("do_xd_request: unknown request\n");
- end_request(req, 0);
- continue;
- }
+ if (!blk_fs_request(req))
+ goto done;
+ if (block + count > get_capacity(req->rq_disk))
+ goto done;
for (retry = 0; (retry < XD_RETRIES) && !res; retry++)
- res = xd_readwrite(rw, disk, req->buffer, block, count);
- end_request(req, res); /* wrap up, 0 = fail, 1 = success */
+ res = xd_readwrite(rq_data_dir(req), disk, req->buffer,
+ block, count);
+ done:
+ /* wrap up, 0 = success, -errno = fail */
+ if (!__blk_end_request_cur(req, res))
+ req = blk_fetch_request(q);
}
}
printk("xd%c: %s timeout, recalibrating drive\n",'a'+drive,(operation == READ ? "read" : "write"));
xd_recalibrate(drive);
spin_lock_irq(&xd_lock);
- return (0);
+ return -EIO;
case 2:
if (sense[0] & 0x30) {
printk("xd%c: %s - ",'a'+drive,(operation == READ ? "reading" : "writing"));
else
printk(" - no valid disk address\n");
spin_lock_irq(&xd_lock);
- return (0);
+ return -EIO;
}
if (xd_dma_buffer)
for (i=0; i < (temp * 0x200); i++)
count -= temp, buffer += temp * 0x200, block += temp;
}
spin_lock_irq(&xd_lock);
- return (1);
+ return 0;
}
/* xd_recalibrate: recalibrate a given drive and reset controller if necessary */
static int get_id_from_freelist(struct blkfront_info *info)
{
unsigned long free = info->shadow_free;
- BUG_ON(free > BLK_RING_SIZE);
+ BUG_ON(free >= BLK_RING_SIZE);
info->shadow_free = info->shadow[free].req.id;
info->shadow[free].req.id = 0x0fffffee; /* debug */
return free;
info->shadow[id].request = (unsigned long)req;
ring_req->id = id;
- ring_req->sector_number = (blkif_sector_t)req->sector;
+ ring_req->sector_number = (blkif_sector_t)blk_rq_pos(req);
ring_req->handle = info->handle;
ring_req->operation = rq_data_dir(req) ?
queued = 0;
- while ((req = elv_next_request(rq)) != NULL) {
+ while ((req = blk_peek_request(rq)) != NULL) {
info = req->rq_disk->private_data;
- if (!blk_fs_request(req)) {
- end_request(req, 0);
- continue;
- }
if (RING_FULL(&info->ring))
goto wait;
- pr_debug("do_blk_req %p: cmd %p, sec %lx, "
- "(%u/%li) buffer:%p [%s]\n",
- req, req->cmd, (unsigned long)req->sector,
- req->current_nr_sectors,
- req->nr_sectors, req->buffer,
- rq_data_dir(req) ? "write" : "read");
+ blk_start_request(req);
+ if (!blk_fs_request(req)) {
+ __blk_end_request_all(req, -EIO);
+ continue;
+ }
+
+ pr_debug("do_blk_req %p: cmd %p, sec %lx, "
+ "(%u/%u) buffer:%p [%s]\n",
+ req, req->cmd, (unsigned long)blk_rq_pos(req),
+ blk_rq_cur_sectors(req), blk_rq_sectors(req),
+ req->buffer, rq_data_dir(req) ? "write" : "read");
- blkdev_dequeue_request(req);
if (blkif_queue_request(req)) {
blk_requeue_request(rq, req);
wait:
for (i = info->ring.rsp_cons; i != rp; i++) {
unsigned long id;
- int ret;
bret = RING_GET_RESPONSE(&info->ring, i);
id = bret->id;
dev_dbg(&info->xbdev->dev, "Bad return from blkdev data "
"request: %x\n", bret->status);
- ret = __blk_end_request(req, error, blk_rq_bytes(req));
- BUG_ON(ret);
+ __blk_end_request_all(req, error);
break;
default:
BUG();
{
struct request *req;
- while ((req = elv_next_request(q)) != NULL) {
+ while ((req = blk_peek_request(q)) != NULL) {
if (blk_fs_request(req))
break;
- end_request(req, 0);
+ blk_start_request(req);
+ __blk_end_request_all(req, -EIO);
}
return req;
}
set_capacity(ace->gd, 0);
dev_info(ace->dev, "No CF in slot\n");
- /* Drop all pending requests */
- while ((req = elv_next_request(ace->queue)) != NULL)
- end_request(req, 0);
+ /* Drop all in-flight and pending requests */
+ if (ace->req) {
+ __blk_end_request_all(ace->req, -EIO);
+ ace->req = NULL;
+ }
+ while ((req = blk_fetch_request(ace->queue)) != NULL)
+ __blk_end_request_all(req, -EIO);
/* Drop back to IDLE state and notify waiters */
ace->fsm_state = ACE_FSM_STATE_IDLE;
ace->fsm_state = ACE_FSM_STATE_IDLE;
break;
}
+ blk_start_request(req);
/* Okay, it's a data request, set it up for transfer */
dev_dbg(ace->dev,
- "request: sec=%llx hcnt=%lx, ccnt=%x, dir=%i\n",
- (unsigned long long) req->sector, req->hard_nr_sectors,
- req->current_nr_sectors, rq_data_dir(req));
+ "request: sec=%llx hcnt=%x, ccnt=%x, dir=%i\n",
+ (unsigned long long)blk_rq_pos(req),
+ blk_rq_sectors(req), blk_rq_cur_sectors(req),
+ rq_data_dir(req));
ace->req = req;
ace->data_ptr = req->buffer;
- ace->data_count = req->current_nr_sectors * ACE_BUF_PER_SECTOR;
- ace_out32(ace, ACE_MPULBA, req->sector & 0x0FFFFFFF);
+ ace->data_count = blk_rq_cur_sectors(req) * ACE_BUF_PER_SECTOR;
+ ace_out32(ace, ACE_MPULBA, blk_rq_pos(req) & 0x0FFFFFFF);
- count = req->hard_nr_sectors;
+ count = blk_rq_sectors(req);
if (rq_data_dir(req)) {
/* Kick off write request */
dev_dbg(ace->dev, "write data\n");
dev_dbg(ace->dev,
"CFBSY set; t=%i iter=%i c=%i dc=%i irq=%i\n",
ace->fsm_task, ace->fsm_iter_num,
- ace->req->current_nr_sectors * 16,
+ blk_rq_cur_sectors(ace->req) * 16,
ace->data_count, ace->in_irq);
ace_fsm_yield(ace); /* need to poll CFBSY bit */
break;
dev_dbg(ace->dev,
"DATABUF not set; t=%i iter=%i c=%i dc=%i irq=%i\n",
ace->fsm_task, ace->fsm_iter_num,
- ace->req->current_nr_sectors * 16,
+ blk_rq_cur_sectors(ace->req) * 16,
ace->data_count, ace->in_irq);
ace_fsm_yieldirq(ace);
break;
}
/* bio finished; is there another one? */
- if (__blk_end_request(ace->req, 0,
- blk_rq_cur_bytes(ace->req))) {
- /* dev_dbg(ace->dev, "next block; h=%li c=%i\n",
- * ace->req->hard_nr_sectors,
- * ace->req->current_nr_sectors);
+ if (__blk_end_request_cur(ace->req, 0)) {
+ /* dev_dbg(ace->dev, "next block; h=%u c=%u\n",
+ * blk_rq_sectors(ace->req),
+ * blk_rq_cur_sectors(ace->req));
*/
ace->data_ptr = ace->req->buffer;
- ace->data_count = ace->req->current_nr_sectors * 16;
+ ace->data_count = blk_rq_cur_sectors(ace->req) * 16;
ace_fsm_yieldirq(ace);
break;
}
static void do_z2_request(struct request_queue *q)
{
struct request *req;
- while ((req = elv_next_request(q)) != NULL) {
- unsigned long start = req->sector << 9;
- unsigned long len = req->current_nr_sectors << 9;
+
+ req = blk_fetch_request(q);
+ while (req) {
+ unsigned long start = blk_rq_pos(req) << 9;
+ unsigned long len = blk_rq_cur_bytes(req);
+ int err = 0;
if (start + len > z2ram_size) {
printk( KERN_ERR DEVICE_NAME ": bad access: block=%lu, count=%u\n",
- req->sector, req->current_nr_sectors);
- end_request(req, 0);
- continue;
+ blk_rq_pos(req), blk_rq_cur_sectors(req));
+ err = -EIO;
+ goto done;
}
while (len) {
unsigned long addr = start & Z2RAM_CHUNKMASK;
start += size;
len -= size;
}
- end_request(req, 1);
+ done:
+ if (!__blk_end_request_cur(req, err))
+ req = blk_fetch_request(q);
}
}
list_for_each_safe(elem, next, &gdrom_deferred) {
req = list_entry(elem, struct request, queuelist);
spin_unlock(&gdrom_lock);
- block = req->sector/GD_TO_BLK + GD_SESSION_OFFSET;
- block_cnt = req->nr_sectors/GD_TO_BLK;
+ block = blk_rq_pos(req)/GD_TO_BLK + GD_SESSION_OFFSET;
+ block_cnt = blk_rq_sectors(req)/GD_TO_BLK;
ctrl_outl(PHYSADDR(req->buffer), GDROM_DMA_STARTADDR_REG);
ctrl_outl(block_cnt * GDROM_HARD_SECTOR, GDROM_DMA_LENGTH_REG);
ctrl_outl(1, GDROM_DMA_DIRECTION_REG);
* before handling ending the request */
spin_lock(&gdrom_lock);
list_del_init(&req->queuelist);
- __blk_end_request(req, err, blk_rq_bytes(req));
+ __blk_end_request_all(req, err);
}
spin_unlock(&gdrom_lock);
kfree(read_command);
}
-static void gdrom_request_handler_dma(struct request *req)
-{
- /* dequeue, add to list of deferred work
- * and then schedule workqueue */
- blkdev_dequeue_request(req);
- list_add_tail(&req->queuelist, &gdrom_deferred);
- schedule_work(&work);
-}
-
static void gdrom_request(struct request_queue *rq)
{
struct request *req;
- while ((req = elv_next_request(rq)) != NULL) {
+ while ((req = blk_fetch_request(rq)) != NULL) {
if (!blk_fs_request(req)) {
printk(KERN_DEBUG "GDROM: Non-fs request ignored\n");
- end_request(req, 0);
+ __blk_end_request_all(req, -EIO);
+ continue;
}
if (rq_data_dir(req) != READ) {
printk(KERN_NOTICE "GDROM: Read only device -");
printk(" write request ignored\n");
- end_request(req, 0);
+ __blk_end_request_all(req, -EIO);
+ continue;
}
- if (req->nr_sectors)
- gdrom_request_handler_dma(req);
- else
- end_request(req, 0);
+
+ /*
+ * Add to list of deferred work and then schedule
+ * workqueue.
+ */
+ list_add_tail(&req->queuelist, &gdrom_deferred);
+ schedule_work(&work);
}
}
viopath_targetinst(viopath_hostLp),
(u64)req, VIOVERSION << 16,
((u64)DEVICE_NR(diskinfo) << 48) | dmaaddr,
- (u64)req->sector * 512, len, 0);
+ (u64)blk_rq_pos(req) * 512, len, 0);
if (hvrc != HvLpEvent_Rc_Good) {
printk(VIOCD_KERN_WARNING "hv error on op %d\n", (int)hvrc);
return -1;
return 0;
}
-static void viocd_end_request(struct request *req, int error)
-{
- int nsectors = req->hard_nr_sectors;
-
- /*
- * Make sure it's fully ended, and ensure that we process
- * at least one sector.
- */
- if (blk_pc_request(req))
- nsectors = (req->data_len + 511) >> 9;
- if (!nsectors)
- nsectors = 1;
-
- if (__blk_end_request(req, error, nsectors << 9))
- BUG();
-}
-
static int rwreq;
static void do_viocd_request(struct request_queue *q)
{
struct request *req;
- while ((rwreq == 0) && ((req = elv_next_request(q)) != NULL)) {
+ while ((rwreq == 0) && ((req = blk_fetch_request(q)) != NULL)) {
if (!blk_fs_request(req))
- viocd_end_request(req, -EIO);
+ __blk_end_request_all(req, -EIO);
else if (send_request(req) < 0) {
printk(VIOCD_KERN_WARNING
"unable to send message to OS/400!");
- viocd_end_request(req, -EIO);
+ __blk_end_request_all(req, -EIO);
} else
rwreq++;
}
"with rc %d:0x%04X: %s\n",
req, event->xRc,
bevent->sub_result, err->msg);
- viocd_end_request(req, -EIO);
+ __blk_end_request_all(req, -EIO);
} else
- viocd_end_request(req, 0);
+ __blk_end_request_all(req, 0);
/* restart handling of incoming requests */
spin_unlock_irqrestore(&viocd_reqlock, flags);
}
EXPORT_SYMBOL_GPL(ide_init_pc);
-/*
- * Generate a new packet command request in front of the request queue, before
- * the current request, so that it will be processed immediately, on the next
- * pass through the driver.
- */
-static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk,
- struct ide_atapi_pc *pc, struct request *rq)
-{
- blk_rq_init(NULL, rq);
- rq->cmd_type = REQ_TYPE_SPECIAL;
- rq->cmd_flags |= REQ_PREEMPT;
- rq->buffer = (char *)pc;
- rq->rq_disk = disk;
-
- if (pc->req_xfer) {
- rq->data = pc->buf;
- rq->data_len = pc->req_xfer;
- }
-
- memcpy(rq->cmd, pc->c, 12);
- if (drive->media == ide_tape)
- rq->cmd[13] = REQ_IDETAPE_PC1;
-
- drive->hwif->rq = NULL;
-
- elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
-}
-
/*
* Add a special packet command request to the tail of the request queue,
* and wait for it to be serviced.
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_SPECIAL;
- rq->buffer = (char *)pc;
+ rq->special = (char *)pc;
if (pc->req_xfer) {
- rq->data = pc->buf;
- rq->data_len = pc->req_xfer;
+ error = blk_rq_map_kern(drive->queue, rq, pc->buf, pc->req_xfer,
+ GFP_NOIO);
+ if (error)
+ goto put_req;
}
memcpy(rq->cmd, pc->c, 12);
if (drive->media == ide_tape)
rq->cmd[13] = REQ_IDETAPE_PC1;
error = blk_execute_rq(drive->queue, disk, rq, 0);
+put_req:
blk_put_request(rq);
-
return error;
}
EXPORT_SYMBOL_GPL(ide_queue_pc_tail);
}
EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd);
+void ide_prep_sense(ide_drive_t *drive, struct request *rq)
+{
+ struct request_sense *sense = &drive->sense_data;
+ struct request *sense_rq = &drive->sense_rq;
+ unsigned int cmd_len, sense_len;
+ int err;
+
+ debug_log("%s: enter\n", __func__);
+
+ switch (drive->media) {
+ case ide_floppy:
+ cmd_len = 255;
+ sense_len = 18;
+ break;
+ case ide_tape:
+ cmd_len = 20;
+ sense_len = 20;
+ break;
+ default:
+ cmd_len = 18;
+ sense_len = 18;
+ }
+
+ BUG_ON(sense_len > sizeof(*sense));
+
+ if (blk_sense_request(rq) || drive->sense_rq_armed)
+ return;
+
+ memset(sense, 0, sizeof(*sense));
+
+ blk_rq_init(rq->q, sense_rq);
+
+ err = blk_rq_map_kern(drive->queue, sense_rq, sense, sense_len,
+ GFP_NOIO);
+ if (unlikely(err)) {
+ if (printk_ratelimit())
+ printk(KERN_WARNING "%s: failed to map sense buffer\n",
+ drive->name);
+ return;
+ }
+
+ sense_rq->rq_disk = rq->rq_disk;
+ sense_rq->cmd[0] = GPCMD_REQUEST_SENSE;
+ sense_rq->cmd[4] = cmd_len;
+ sense_rq->cmd_type = REQ_TYPE_SENSE;
+ sense_rq->cmd_flags |= REQ_PREEMPT;
+
+ if (drive->media == ide_tape)
+ sense_rq->cmd[13] = REQ_IDETAPE_PC1;
+
+ drive->sense_rq_armed = true;
+}
+EXPORT_SYMBOL_GPL(ide_prep_sense);
+
+int ide_queue_sense_rq(ide_drive_t *drive, void *special)
+{
+ /* deferred failure from ide_prep_sense() */
+ if (!drive->sense_rq_armed) {
+ printk(KERN_WARNING "%s: failed queue sense request\n",
+ drive->name);
+ return -ENOMEM;
+ }
+
+ drive->sense_rq.special = special;
+ drive->sense_rq_armed = false;
+
+ drive->hwif->rq = NULL;
+
+ elv_add_request(drive->queue, &drive->sense_rq,
+ ELEVATOR_INSERT_FRONT, 0);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ide_queue_sense_rq);
+
/*
* Called when an error was detected during the last packet command.
- * We queue a request sense packet command in the head of the request list.
+ * We queue a request sense packet command at the head of the request
+ * queue.
*/
-void ide_retry_pc(ide_drive_t *drive, struct gendisk *disk)
+void ide_retry_pc(ide_drive_t *drive)
{
- struct request *rq = &drive->request_sense_rq;
+ struct request *failed_rq = drive->hwif->rq;
+ struct request *sense_rq = &drive->sense_rq;
struct ide_atapi_pc *pc = &drive->request_sense_pc;
(void)ide_read_error(drive);
- ide_create_request_sense_cmd(drive, pc);
+
+ /* init pc from sense_rq */
+ ide_init_pc(pc);
+ memcpy(pc->c, sense_rq->cmd, 12);
+ pc->buf = bio_data(sense_rq->bio); /* pointer to mapped address */
+ pc->req_xfer = blk_rq_bytes(sense_rq);
+
if (drive->media == ide_tape)
set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
- ide_queue_pc_head(drive, disk, pc, rq);
+
+ /*
+ * Push back the failed request and put request sense on top
+ * of it. The failed command will be retried after sense data
+ * is acquired.
+ */
+ blk_requeue_request(failed_rq->q, failed_rq);
+ drive->hwif->rq = NULL;
+ if (ide_queue_sense_rq(drive, pc)) {
+ blk_start_request(failed_rq);
+ ide_complete_rq(drive, -EIO, blk_rq_bytes(failed_rq));
+ }
}
EXPORT_SYMBOL_GPL(ide_retry_pc);
return 32768;
else if (blk_sense_request(rq) || blk_pc_request(rq) ||
rq->cmd_type == REQ_TYPE_ATA_PC)
- return rq->data_len;
+ return blk_rq_bytes(rq);
else
return 0;
}
struct ide_cmd *cmd = &hwif->cmd;
struct request *rq = hwif->rq;
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
- xfer_func_t *xferfunc;
unsigned int timeout, done;
u16 bcount;
u8 stat, ireason, dsc = 0;
drive->name, rq_data_dir(pc->rq)
? "write" : "read");
pc->flags |= PC_FLAG_DMA_ERROR;
- } else {
+ } else
pc->xferred = pc->req_xfer;
- if (drive->pc_update_buffers)
- drive->pc_update_buffers(drive, pc);
- }
debug_log("%s: DMA finished\n", drive->name);
}
/* No more interrupts */
if ((stat & ATA_DRQ) == 0) {
int uptodate, error;
- unsigned int done;
debug_log("Packet command completed, %d bytes transferred\n",
pc->xferred);
debug_log("[cmd %x]: check condition\n", rq->cmd[0]);
/* Retry operation */
- ide_retry_pc(drive, rq->rq_disk);
+ ide_retry_pc(drive);
/* queued, but not started */
return ide_stopped;
if (blk_special_request(rq)) {
rq->errors = 0;
- done = blk_rq_bytes(rq);
error = 0;
} else {
rq->errors = -EIO;
}
- if (drive->media == ide_tape)
- done = ide_rq_bytes(rq); /* FIXME */
- else
- done = blk_rq_bytes(rq);
-
error = uptodate ? 0 : -EIO;
}
- ide_complete_rq(drive, error, done);
+ ide_complete_rq(drive, error, blk_rq_bytes(rq));
return ide_stopped;
}
return ide_do_reset(drive);
}
- xferfunc = write ? tp_ops->output_data : tp_ops->input_data;
-
- if (drive->media == ide_floppy && pc->buf == NULL) {
- done = min_t(unsigned int, bcount, cmd->nleft);
- ide_pio_bytes(drive, cmd, write, done);
- } else if (drive->media == ide_tape && pc->bh) {
- done = drive->pc_io_buffers(drive, pc, bcount, write);
- } else {
- done = min_t(unsigned int, bcount, pc->req_xfer - pc->xferred);
- xferfunc(drive, NULL, pc->cur_pos, done);
- }
+ done = min_t(unsigned int, bcount, cmd->nleft);
+ ide_pio_bytes(drive, cmd, write, done);
- /* Update the current position */
+ /* Update transferred byte count */
pc->xferred += done;
- pc->cur_pos += done;
bcount -= done;
/* We haven't transferred any data yet */
pc->xferred = 0;
- pc->cur_pos = pc->buf;
valid_tf = IDE_VALID_DEVICE;
bcount = ((drive->media == ide_tape) ?
ide_cd_log_error(drive->name, failed_command, sense);
}
-static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
- struct request *failed_command)
-{
- struct cdrom_info *info = drive->driver_data;
- struct request *rq = &drive->request_sense_rq;
-
- ide_debug_log(IDE_DBG_SENSE, "enter");
-
- if (sense == NULL)
- sense = &info->sense_data;
-
- /* stuff the sense request in front of our current request */
- blk_rq_init(NULL, rq);
- rq->cmd_type = REQ_TYPE_ATA_PC;
- rq->rq_disk = info->disk;
-
- rq->data = sense;
- rq->cmd[0] = GPCMD_REQUEST_SENSE;
- rq->cmd[4] = 18;
- rq->data_len = 18;
-
- rq->cmd_type = REQ_TYPE_SENSE;
- rq->cmd_flags |= REQ_PREEMPT;
-
- /* NOTE! Save the failed command in "rq->buffer" */
- rq->buffer = (void *) failed_command;
-
- if (failed_command)
- ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x",
- failed_command->cmd[0]);
-
- drive->hwif->rq = NULL;
-
- elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
-}
-
static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
{
/*
- * For REQ_TYPE_SENSE, "rq->buffer" points to the original
- * failed request
+ * For REQ_TYPE_SENSE, "rq->special" points to the original
+ * failed request. Also, the sense data should be read
+ * directly from rq which might be different from the original
+ * sense buffer if it got copied during mapping.
*/
- struct request *failed = (struct request *)rq->buffer;
- struct cdrom_info *info = drive->driver_data;
- void *sense = &info->sense_data;
+ struct request *failed = (struct request *)rq->special;
+ void *sense = bio_data(rq->bio);
if (failed) {
if (failed->sense) {
+ /*
+ * Sense is always read into drive->sense_data.
+ * Copy back if the failed request has its
+ * sense pointer set.
+ */
+ memcpy(failed->sense, sense, 18);
sense = failed->sense;
failed->sense_len = rq->sense_len;
}
/* if we got a CHECK_CONDITION status, queue a request sense command */
if (stat & ATA_ERR)
- cdrom_queue_request_sense(drive, NULL, NULL);
+ return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
return 1;
end_request:
if (stat & ATA_ERR) {
- struct request_queue *q = drive->queue;
- unsigned long flags;
-
- spin_lock_irqsave(q->queue_lock, flags);
- blkdev_dequeue_request(rq);
- spin_unlock_irqrestore(q->queue_lock, flags);
-
hwif->rq = NULL;
-
- cdrom_queue_request_sense(drive, rq->sense, rq);
- return 1;
+ return ide_queue_sense_rq(drive, rq) ? 2 : 1;
} else
return 2;
}
* and some drives don't send them. Sigh.
*/
if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
- cmd->nleft > 0 && cmd->nleft <= 5) {
- unsigned int ofs = cmd->nbytes - cmd->nleft;
-
- while (cmd->nleft > 0) {
- *((u8 *)rq->data + ofs++) = 0;
- cmd->nleft--;
- }
- }
+ cmd->nleft > 0 && cmd->nleft <= 5)
+ cmd->nleft = 0;
}
int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
rq->cmd_flags |= cmd_flags;
rq->timeout = timeout;
if (buffer) {
- rq->data = buffer;
- rq->data_len = *bufflen;
+ error = blk_rq_map_kern(drive->queue, rq, buffer,
+ *bufflen, GFP_NOIO);
+ if (error) {
+ blk_put_request(rq);
+ return error;
+ }
}
error = blk_execute_rq(drive->queue, info->disk, rq, 0);
if (buffer)
- *bufflen = rq->data_len;
+ *bufflen = rq->resid_len;
flags = rq->cmd_flags;
blk_put_request(rq);
struct request *rq = hwif->rq;
ide_expiry_t *expiry = NULL;
int dma_error = 0, dma, thislen, uptodate = 0;
- int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0, nsectors;
+ int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
int sense = blk_sense_request(rq);
unsigned int timeout;
u16 len;
out_end:
if (blk_pc_request(rq) && rc == 0) {
- unsigned int dlen = rq->data_len;
-
- rq->data_len = 0;
-
- if (blk_end_request(rq, 0, dlen))
- BUG();
-
+ rq->resid_len = 0;
+ blk_end_request_all(rq, 0);
hwif->rq = NULL;
} else {
if (sense && uptodate)
ide_cd_error_cmd(drive, cmd);
/* make sure it's fully ended */
- if (blk_pc_request(rq))
- nsectors = (rq->data_len + 511) >> 9;
- else
- nsectors = rq->hard_nr_sectors;
-
- if (nsectors == 0)
- nsectors = 1;
-
if (blk_fs_request(rq) == 0) {
- rq->data_len -= (cmd->nbytes - cmd->nleft);
+ rq->resid_len -= cmd->nbytes - cmd->nleft;
if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
- rq->data_len += cmd->last_xfer_len;
+ rq->resid_len += cmd->last_xfer_len;
}
- ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
+ ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
if (sense && rc == 2)
ide_error(drive, "request sense failure", stat);
}
/* fs requests *must* be hardware frame aligned */
- if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
- (rq->sector & (sectors_per_frame - 1)))
+ if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
+ (blk_rq_pos(rq) & (sectors_per_frame - 1)))
return ide_stopped;
/* use DMA, if possible */
drive->dma = 0;
/* sg request */
- if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
+ if (rq->bio) {
struct request_queue *q = drive->queue;
+ char *buf = bio_data(rq->bio);
unsigned int alignment;
- char *buf;
-
- if (rq->bio)
- buf = bio_data(rq->bio);
- else
- buf = rq->data;
drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
*/
alignment = queue_dma_alignment(q) | q->dma_pad_mask;
if ((unsigned long)buf & alignment
- || rq->data_len & q->dma_pad_mask
+ || blk_rq_bytes(rq) & q->dma_pad_mask
|| object_is_on_stack(buf))
drive->dma = 0;
}
goto out_end;
}
+ /* prepare sense request for this command */
+ ide_prep_sense(drive, rq);
+
memset(&cmd, 0, sizeof(cmd));
if (rq_data_dir(rq))
cmd.rq = rq;
- if (blk_fs_request(rq) || rq->data_len) {
- ide_init_sg_cmd(&cmd, blk_fs_request(rq) ? (rq->nr_sectors << 9)
- : rq->data_len);
+ if (blk_fs_request(rq) || blk_rq_bytes(rq)) {
+ ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
ide_map_sg(drive, &cmd);
}
return ide_issue_pc(drive, &cmd);
out_end:
- nsectors = rq->hard_nr_sectors;
+ nsectors = blk_rq_sectors(rq);
if (nsectors == 0)
nsectors = 1;
static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
{
int hard_sect = queue_hardsect_size(q);
- long block = (long)rq->hard_sector / (hard_sect >> 9);
- unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
+ long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
+ unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
memset(rq->cmd, 0, BLK_MAX_CDB);
struct atapi_toc *toc;
- /* The result of the last successful request sense command
- on this device. */
- struct request_sense sense_data;
-
u8 max_speed; /* Max speed of the drive. */
u8 current_speed; /* Current speed of the drive. */
sector_t block)
{
ide_hwif_t *hwif = drive->hwif;
- u16 nsectors = (u16)rq->nr_sectors;
+ u16 nsectors = (u16)blk_rq_sectors(rq);
u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48);
u8 dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
struct ide_cmd cmd;
ide_startstop_t rc;
if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) {
- if (block + rq->nr_sectors > 1ULL << 28)
+ if (block + blk_rq_sectors(rq) > 1ULL << 28)
dma = 0;
else
lba48 = 0;
ledtrig_ide_activity();
- pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
+ pr_debug("%s: %sing: block=%llu, sectors=%u, buffer=0x%08lx\n",
drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
- (unsigned long long)block, rq->nr_sectors,
+ (unsigned long long)block, blk_rq_sectors(rq),
(unsigned long)rq->buffer);
if (hwif->rw_disk)
cmd->protocol = ATA_PROT_NODATA;
rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
- rq->cmd_flags |= REQ_SOFTBARRIER;
rq->special = cmd;
}
ide_finish_cmd(drive, cmd, stat);
else
ide_complete_rq(drive, 0,
- cmd->rq->nr_sectors << 9);
+ blk_rq_sectors(cmd->rq) << 9);
return ide_stopped;
}
printk(KERN_ERR "%s: %s: bad DMA status (0x%02x)\n",
/*
* un-busy drive etc and make sure request is sane
*/
-
rq = hwif->rq;
- if (!rq)
- goto out;
-
- hwif->rq = NULL;
-
- rq->errors = 0;
-
- if (!rq->bio)
- goto out;
-
- rq->sector = rq->bio->bi_sector;
- rq->current_nr_sectors = bio_iovec(rq->bio)->bv_len >> 9;
- rq->hard_cur_sectors = rq->current_nr_sectors;
- rq->buffer = bio_data(rq->bio);
-out:
+ if (rq) {
+ hwif->rq = NULL;
+ rq->errors = 0;
+ }
return ret;
}
drive->pc = pc;
if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
+ unsigned int done = blk_rq_bytes(drive->hwif->rq);
+
if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
ide_floppy_report_error(floppy, pc);
+
/* Giving up */
pc->error = IDE_DRV_ERROR_GENERAL;
drive->failed_pc = NULL;
drive->pc_callback(drive, 0);
+ ide_complete_rq(drive, -EIO, done);
return ide_stopped;
}
{
struct ide_disk_obj *floppy = drive->driver_data;
int block = sector / floppy->bs_factor;
- int blocks = rq->nr_sectors / floppy->bs_factor;
+ int blocks = blk_rq_sectors(rq) / floppy->bs_factor;
int cmd = rq_data_dir(rq);
ide_debug_log(IDE_DBG_FUNC, "block: %d, blocks: %d", block, blocks);
ide_init_pc(pc);
memcpy(pc->c, rq->cmd, sizeof(pc->c));
pc->rq = rq;
- if (rq->data_len && rq_data_dir(rq) == WRITE)
- pc->flags |= PC_FLAG_WRITING;
- pc->buf = rq->data;
- if (rq->bio)
+ if (blk_rq_bytes(rq)) {
pc->flags |= PC_FLAG_DMA_OK;
- /*
- * possibly problematic, doesn't look like ide-floppy correctly
- * handled scattered requests if dma fails...
- */
- pc->req_xfer = pc->buf_size = rq->data_len;
+ if (rq_data_dir(rq) == WRITE)
+ pc->flags |= PC_FLAG_WRITING;
+ }
+ /* pio will be performed by ide_pio_bytes() which handles sg fine */
+ pc->buf = NULL;
+ pc->req_xfer = pc->buf_size = blk_rq_bytes(rq);
}
static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
goto out_end;
}
if (blk_fs_request(rq)) {
- if (((long)rq->sector % floppy->bs_factor) ||
- (rq->nr_sectors % floppy->bs_factor)) {
+ if (((long)blk_rq_pos(rq) % floppy->bs_factor) ||
+ (blk_rq_sectors(rq) % floppy->bs_factor)) {
printk(KERN_ERR PFX "%s: unsupported r/w rq size\n",
drive->name);
goto out_end;
}
pc = &floppy->queued_pc;
idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block);
- } else if (blk_special_request(rq)) {
- pc = (struct ide_atapi_pc *) rq->buffer;
+ } else if (blk_special_request(rq) || blk_sense_request(rq)) {
+ pc = (struct ide_atapi_pc *)rq->special;
} else if (blk_pc_request(rq)) {
pc = &floppy->queued_pc;
idefloppy_blockpc_cmd(floppy, pc, rq);
goto out_end;
}
+ ide_prep_sense(drive, rq);
+
memset(&cmd, 0, sizeof(cmd));
if (rq_data_dir(rq))
unsigned int ide_rq_bytes(struct request *rq)
{
if (blk_pc_request(rq))
- return rq->data_len;
+ return blk_rq_bytes(rq);
else
- return rq->hard_cur_sectors << 9;
+ return blk_rq_cur_sectors(rq) << 9;
}
EXPORT_SYMBOL_GPL(ide_rq_bytes);
* and complete the whole request right now
*/
if (blk_noretry_request(rq) && error <= 0)
- nr_bytes = rq->hard_nr_sectors << 9;
+ nr_bytes = blk_rq_sectors(rq) << 9;
rc = ide_end_rq(drive, rq, error, nr_bytes);
if (rc == 0)
struct scatterlist *sg = hwif->sg_table;
struct request *rq = cmd->rq;
- if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
- sg_init_one(sg, rq->buffer, rq->nr_sectors * SECTOR_SIZE);
- cmd->sg_nents = 1;
- } else if (!rq->bio) {
- sg_init_one(sg, rq->data, rq->data_len);
- cmd->sg_nents = 1;
- } else
- cmd->sg_nents = blk_rq_map_sg(drive->queue, rq, sg);
+ cmd->sg_nents = blk_rq_map_sg(drive->queue, rq, sg);
}
EXPORT_SYMBOL_GPL(ide_map_sg);
if (cmd) {
if (cmd->protocol == ATA_PROT_PIO) {
- ide_init_sg_cmd(cmd, rq->nr_sectors << 9);
+ ide_init_sg_cmd(cmd, blk_rq_sectors(rq) << 9);
ide_map_sg(drive, cmd);
}
if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
return execute_drive_cmd(drive, rq);
else if (blk_pm_request(rq)) {
- struct request_pm_state *pm = rq->data;
+ struct request_pm_state *pm = rq->special;
#ifdef DEBUG_PM
printk("%s: start_power_step(step: %d)\n",
drive->name, pm->pm_step);
drv = *(struct ide_driver **)rq->rq_disk->private_data;
- return drv->do_request(drive, rq, rq->sector);
+ return drv->do_request(drive, rq, blk_rq_pos(rq));
}
return do_special(drive);
kill_rq:
spin_unlock_irq(q->queue_lock);
+ /* HLD do_request() callback might sleep, make sure it's okay */
+ might_sleep();
+
if (ide_lock_host(host, hwif))
goto plug_device_2;
if (!ide_lock_port(hwif)) {
ide_hwif_t *prev_port;
+
+ WARN_ON_ONCE(hwif->rq);
repeat:
prev_port = hwif->host->cur_port;
- hwif->rq = NULL;
-
if (drive->dev_flags & IDE_DFLAG_SLEEPING &&
time_after(drive->sleep, jiffies)) {
ide_unlock_port(hwif);
* we know that the queue isn't empty, but this can happen
* if the q->prep_rq_fn() decides to kill a request
*/
- rq = elv_next_request(drive->queue);
+ if (!rq)
+ rq = blk_fetch_request(drive->queue);
+
spin_unlock_irq(q->queue_lock);
spin_lock_irq(&hwif->lock);
/*
* Sanity: don't accept a request that isn't a PM request
* if we are currently power managed. This is very important as
- * blk_stop_queue() doesn't prevent the elv_next_request()
+ * blk_stop_queue() doesn't prevent the blk_fetch_request()
* above to return us whatever is in the queue. Since we call
* ide_do_request() ourselves, we end up taking requests while
* the queue is blocked...
startstop = start_request(drive, rq);
spin_lock_irq(&hwif->lock);
- if (startstop == ide_stopped)
+ if (startstop == ide_stopped) {
+ rq = hwif->rq;
+ hwif->rq = NULL;
goto repeat;
+ }
} else
goto plug_device;
out:
plug_device_2:
spin_lock_irq(q->queue_lock);
+ if (rq)
+ blk_requeue_request(q, rq);
if (!elv_queue_empty(q))
blk_plug_device(q);
}
-static void ide_plug_device(ide_drive_t *drive)
+static void ide_requeue_and_plug(ide_drive_t *drive, struct request *rq)
{
struct request_queue *q = drive->queue;
unsigned long flags;
spin_lock_irqsave(q->queue_lock, flags);
+
+ if (rq)
+ blk_requeue_request(q, rq);
if (!elv_queue_empty(q))
blk_plug_device(q);
+
spin_unlock_irqrestore(q->queue_lock, flags);
}
unsigned long flags;
int wait = -1;
int plug_device = 0;
+ struct request *uninitialized_var(rq_in_flight);
spin_lock_irqsave(&hwif->lock, flags);
spin_lock_irq(&hwif->lock);
enable_irq(hwif->irq);
if (startstop == ide_stopped) {
+ rq_in_flight = hwif->rq;
+ hwif->rq = NULL;
ide_unlock_port(hwif);
plug_device = 1;
}
if (plug_device) {
ide_unlock_host(hwif->host);
- ide_plug_device(drive);
+ ide_requeue_and_plug(drive, rq_in_flight);
}
}
ide_startstop_t startstop;
irqreturn_t irq_ret = IRQ_NONE;
int plug_device = 0;
+ struct request *uninitialized_var(rq_in_flight);
if (host->host_flags & IDE_HFLAG_SERIALIZE) {
if (hwif != host->cur_port)
*/
if (startstop == ide_stopped) {
BUG_ON(hwif->handler);
+ rq_in_flight = hwif->rq;
+ hwif->rq = NULL;
ide_unlock_port(hwif);
plug_device = 1;
}
out_early:
if (plug_device) {
ide_unlock_host(hwif->host);
- ide_plug_device(drive);
+ ide_requeue_and_plug(drive, rq_in_flight);
}
return irq_ret;
rq->cmd_type = REQ_TYPE_SPECIAL;
rq->cmd_len = 1;
rq->cmd[0] = REQ_DRIVE_RESET;
- rq->cmd_flags |= REQ_SOFTBARRIER;
if (blk_execute_rq(drive->queue, NULL, rq, 1))
ret = rq->errors;
blk_put_request(rq);
if (rq)
printk(KERN_CONT ", sector=%llu",
- (unsigned long long)rq->sector);
+ (unsigned long long)blk_rq_pos(rq));
}
printk(KERN_CONT "\n");
}
start_queue = 1;
spin_unlock_irq(&hwif->lock);
- if (start_queue) {
- spin_lock_irq(q->queue_lock);
- blk_start_queueing(q);
- spin_unlock_irq(q->queue_lock);
- }
+ if (start_queue)
+ blk_run_queue(q);
return;
}
spin_unlock_irq(&hwif->lock);
ide_hwif_t *hwif = drive->hwif;
struct request *rq;
struct request_pm_state rqpm;
- struct ide_cmd cmd;
int ret;
/* call ACPI _GTM only once */
ide_acpi_get_timing(hwif);
memset(&rqpm, 0, sizeof(rqpm));
- memset(&cmd, 0, sizeof(cmd));
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_PM_SUSPEND;
- rq->special = &cmd;
- rq->data = &rqpm;
+ rq->special = &rqpm;
rqpm.pm_step = IDE_PM_START_SUSPEND;
if (mesg.event == PM_EVENT_PRETHAW)
mesg.event = PM_EVENT_FREEZE;
ide_hwif_t *hwif = drive->hwif;
struct request *rq;
struct request_pm_state rqpm;
- struct ide_cmd cmd;
int err;
/* call ACPI _PS0 / _STM only once */
ide_acpi_exec_tfs(drive);
memset(&rqpm, 0, sizeof(rqpm));
- memset(&cmd, 0, sizeof(cmd));
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_PM_RESUME;
rq->cmd_flags |= REQ_PREEMPT;
- rq->special = &cmd;
- rq->data = &rqpm;
+ rq->special = &rqpm;
rqpm.pm_step = IDE_PM_START_RESUME;
rqpm.pm_state = PM_EVENT_ON;
void ide_complete_power_step(ide_drive_t *drive, struct request *rq)
{
- struct request_pm_state *pm = rq->data;
+ struct request_pm_state *pm = rq->special;
#ifdef DEBUG_PM
printk(KERN_INFO "%s: complete_power_step(step: %d)\n",
ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *rq)
{
- struct request_pm_state *pm = rq->data;
- struct ide_cmd *cmd = rq->special;
-
- memset(cmd, 0, sizeof(*cmd));
+ struct request_pm_state *pm = rq->special;
+ struct ide_cmd cmd = { };
switch (pm->pm_step) {
case IDE_PM_FLUSH_CACHE: /* Suspend step 1 (flush cache) */
return ide_stopped;
}
if (ata_id_flush_ext_enabled(drive->id))
- cmd->tf.command = ATA_CMD_FLUSH_EXT;
+ cmd.tf.command = ATA_CMD_FLUSH_EXT;
else
- cmd->tf.command = ATA_CMD_FLUSH;
+ cmd.tf.command = ATA_CMD_FLUSH;
goto out_do_tf;
case IDE_PM_STANDBY: /* Suspend step 2 (standby) */
- cmd->tf.command = ATA_CMD_STANDBYNOW1;
+ cmd.tf.command = ATA_CMD_STANDBYNOW1;
goto out_do_tf;
case IDE_PM_RESTORE_PIO: /* Resume step 1 (restore PIO) */
ide_set_max_pio(drive);
ide_complete_power_step(drive, rq);
return ide_stopped;
case IDE_PM_IDLE: /* Resume step 2 (idle) */
- cmd->tf.command = ATA_CMD_IDLEIMMEDIATE;
+ cmd.tf.command = ATA_CMD_IDLEIMMEDIATE;
goto out_do_tf;
case IDE_PM_RESTORE_DMA: /* Resume step 3 (restore DMA) */
/*
return ide_stopped;
out_do_tf:
- cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
- cmd->valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
- cmd->protocol = ATA_PROT_NODATA;
+ cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+ cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE;
+ cmd.protocol = ATA_PROT_NODATA;
- return do_rw_taskfile(drive, cmd);
+ return do_rw_taskfile(drive, &cmd);
}
/**
void ide_complete_pm_rq(ide_drive_t *drive, struct request *rq)
{
struct request_queue *q = drive->queue;
- struct request_pm_state *pm = rq->data;
+ struct request_pm_state *pm = rq->special;
unsigned long flags;
ide_complete_power_step(drive, rq);
void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
{
- struct request_pm_state *pm = rq->data;
+ struct request_pm_state *pm = rq->special;
if (blk_pm_suspend_request(rq) &&
pm->pm_step == IDE_PM_START_SUSPEND)
IDETAPE_DIR_WRITE = (1 << 2),
};
-struct idetape_bh {
- u32 b_size;
- atomic_t b_count;
- struct idetape_bh *b_reqnext;
- char *b_data;
-};
-
/* Tape door status */
#define DOOR_UNLOCKED 0
#define DOOR_LOCKED 1
/* Data buffer size chosen based on the tape's recommendation */
int buffer_size;
- /* merge buffer */
- struct idetape_bh *merge_bh;
- /* size of the merge buffer */
- int merge_bh_size;
- /* pointer to current buffer head within the merge buffer */
- struct idetape_bh *bh;
- char *b_data;
- int b_count;
-
- int pages_per_buffer;
- /* Wasted space in each stage */
- int excess_bh_size;
+ /* Staging buffer of buffer_size bytes */
+ void *buf;
+ /* The read/write cursor */
+ void *cur;
+ /* The number of valid bytes in buf */
+ size_t valid;
/* Measures average tape speed */
unsigned long avg_time;
return tape;
}
-static int idetape_input_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
- unsigned int bcount)
-{
- struct idetape_bh *bh = pc->bh;
- int count;
-
- while (bcount) {
- if (bh == NULL)
- break;
- count = min(
- (unsigned int)(bh->b_size - atomic_read(&bh->b_count)),
- bcount);
- drive->hwif->tp_ops->input_data(drive, NULL, bh->b_data +
- atomic_read(&bh->b_count), count);
- bcount -= count;
- atomic_add(count, &bh->b_count);
- if (atomic_read(&bh->b_count) == bh->b_size) {
- bh = bh->b_reqnext;
- if (bh)
- atomic_set(&bh->b_count, 0);
- }
- }
-
- pc->bh = bh;
-
- return bcount;
-}
-
-static int idetape_output_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
- unsigned int bcount)
-{
- struct idetape_bh *bh = pc->bh;
- int count;
-
- while (bcount) {
- if (bh == NULL)
- break;
- count = min((unsigned int)pc->b_count, (unsigned int)bcount);
- drive->hwif->tp_ops->output_data(drive, NULL, pc->b_data, count);
- bcount -= count;
- pc->b_data += count;
- pc->b_count -= count;
- if (!pc->b_count) {
- bh = bh->b_reqnext;
- pc->bh = bh;
- if (bh) {
- pc->b_data = bh->b_data;
- pc->b_count = atomic_read(&bh->b_count);
- }
- }
- }
-
- return bcount;
-}
-
-static void idetape_update_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc)
-{
- struct idetape_bh *bh = pc->bh;
- int count;
- unsigned int bcount = pc->xferred;
-
- if (pc->flags & PC_FLAG_WRITING)
- return;
- while (bcount) {
- if (bh == NULL) {
- printk(KERN_ERR "ide-tape: bh == NULL in %s\n",
- __func__);
- return;
- }
- count = min((unsigned int)bh->b_size, (unsigned int)bcount);
- atomic_set(&bh->b_count, count);
- if (atomic_read(&bh->b_count) == bh->b_size)
- bh = bh->b_reqnext;
- bcount -= count;
- }
- pc->bh = bh;
-}
-
/*
* called on each failed packet command retry to analyze the request sense. We
* currently do not utilize this information.
pc->c[0], tape->sense_key, tape->asc, tape->ascq);
/* Correct pc->xferred by asking the tape. */
- if (pc->flags & PC_FLAG_DMA_ERROR) {
+ if (pc->flags & PC_FLAG_DMA_ERROR)
pc->xferred = pc->req_xfer -
tape->blk_size *
get_unaligned_be32(&sense[3]);
- idetape_update_buffers(drive, pc);
- }
/*
* If error was the result of a zero-length read or write command,
}
}
-/* Free data buffers completely. */
-static void ide_tape_kfree_buffer(idetape_tape_t *tape)
-{
- struct idetape_bh *prev_bh, *bh = tape->merge_bh;
-
- while (bh) {
- u32 size = bh->b_size;
-
- while (size) {
- unsigned int order = fls(size >> PAGE_SHIFT)-1;
-
- if (bh->b_data)
- free_pages((unsigned long)bh->b_data, order);
-
- size &= (order-1);
- bh->b_data += (1 << order) * PAGE_SIZE;
- }
- prev_bh = bh;
- bh = bh->b_reqnext;
- kfree(prev_bh);
- }
-}
-
static void ide_tape_handle_dsc(ide_drive_t *);
static int ide_tape_callback(ide_drive_t *drive, int dsc)
}
tape->first_frame += blocks;
- rq->current_nr_sectors -= blocks;
+ rq->resid_len -= blocks * tape->blk_size;
if (pc->error) {
uptodate = 0;
idetape_postpone_request(drive);
}
-static int ide_tape_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
- unsigned int bcount, int write)
-{
- unsigned int bleft;
-
- if (write)
- bleft = idetape_output_buffers(drive, pc, bcount);
- else
- bleft = idetape_input_buffers(drive, pc, bcount);
-
- return bcount - bleft;
-}
-
/*
* Packet Command Interface
*
if (pc->retries > IDETAPE_MAX_PC_RETRIES ||
(pc->flags & PC_FLAG_ABORT)) {
+ unsigned int done = blk_rq_bytes(drive->hwif->rq);
+
/*
* We will "abort" retrying a packet command in case legitimate
* error code was received (crossing a filemark, or end of the
/* Giving up */
pc->error = IDE_DRV_ERROR_GENERAL;
}
+
drive->failed_pc = NULL;
drive->pc_callback(drive, 0);
+ ide_complete_rq(drive, -EIO, done);
return ide_stopped;
}
debug_log(DBG_SENSE, "Retry #%d, cmd = %02X\n", pc->retries, pc->c[0]);
printk(KERN_ERR "ide-tape: %s: I/O error, ",
tape->name);
/* Retry operation */
- ide_retry_pc(drive, tape->disk);
+ ide_retry_pc(drive);
return ide_stopped;
}
pc->error = 0;
struct ide_atapi_pc *pc, struct request *rq,
u8 opcode)
{
- struct idetape_bh *bh = (struct idetape_bh *)rq->special;
- unsigned int length = rq->current_nr_sectors;
+ unsigned int length = blk_rq_sectors(rq);
ide_init_pc(pc);
put_unaligned(cpu_to_be32(length), (unsigned int *) &pc->c[1]);
pc->c[1] = 1;
- pc->bh = bh;
pc->buf = NULL;
pc->buf_size = length * tape->blk_size;
pc->req_xfer = pc->buf_size;
if (pc->req_xfer == tape->buffer_size)
pc->flags |= PC_FLAG_DMA_OK;
- if (opcode == READ_6) {
+ if (opcode == READ_6)
pc->c[0] = READ_6;
- atomic_set(&bh->b_count, 0);
- } else if (opcode == WRITE_6) {
+ else if (opcode == WRITE_6) {
pc->c[0] = WRITE_6;
pc->flags |= PC_FLAG_WRITING;
- pc->b_data = bh->b_data;
- pc->b_count = atomic_read(&bh->b_count);
}
memcpy(rq->cmd, pc->c, 12);
struct ide_cmd cmd;
u8 stat;
- debug_log(DBG_SENSE, "sector: %llu, nr_sectors: %lu,"
- " current_nr_sectors: %u\n",
- (unsigned long long)rq->sector, rq->nr_sectors,
- rq->current_nr_sectors);
+ debug_log(DBG_SENSE, "sector: %llu, nr_sectors: %u\n"
+ (unsigned long long)blk_rq_pos(rq), blk_rq_sectors(rq));
- if (!blk_special_request(rq)) {
+ if (!(blk_special_request(rq) || blk_sense_request(rq))) {
/* We do not support buffer cache originated requests. */
printk(KERN_NOTICE "ide-tape: %s: Unsupported request in "
"request queue (%d)\n", drive->name, rq->cmd_type);
goto out;
}
if (rq->cmd[13] & REQ_IDETAPE_PC1) {
- pc = (struct ide_atapi_pc *) rq->buffer;
+ pc = (struct ide_atapi_pc *)rq->special;
rq->cmd[13] &= ~(REQ_IDETAPE_PC1);
rq->cmd[13] |= REQ_IDETAPE_PC2;
goto out;
BUG();
out:
+ /* prepare sense request for this command */
+ ide_prep_sense(drive, rq);
+
memset(&cmd, 0, sizeof(cmd));
if (rq_data_dir(rq))
cmd.rq = rq;
- return ide_tape_issue_pc(drive, &cmd, pc);
-}
-
-/*
- * The function below uses __get_free_pages to allocate a data buffer of size
- * tape->buffer_size (or a bit more). We attempt to combine sequential pages as
- * much as possible.
- *
- * It returns a pointer to the newly allocated buffer, or NULL in case of
- * failure.
- */
-static struct idetape_bh *ide_tape_kmalloc_buffer(idetape_tape_t *tape,
- int full, int clear)
-{
- struct idetape_bh *prev_bh, *bh, *merge_bh;
- int pages = tape->pages_per_buffer;
- unsigned int order, b_allocd;
- char *b_data = NULL;
-
- merge_bh = kmalloc(sizeof(struct idetape_bh), GFP_KERNEL);
- bh = merge_bh;
- if (bh == NULL)
- goto abort;
-
- order = fls(pages) - 1;
- bh->b_data = (char *) __get_free_pages(GFP_KERNEL, order);
- if (!bh->b_data)
- goto abort;
- b_allocd = (1 << order) * PAGE_SIZE;
- pages &= (order-1);
-
- if (clear)
- memset(bh->b_data, 0, b_allocd);
- bh->b_reqnext = NULL;
- bh->b_size = b_allocd;
- atomic_set(&bh->b_count, full ? bh->b_size : 0);
-
- while (pages) {
- order = fls(pages) - 1;
- b_data = (char *) __get_free_pages(GFP_KERNEL, order);
- if (!b_data)
- goto abort;
- b_allocd = (1 << order) * PAGE_SIZE;
-
- if (clear)
- memset(b_data, 0, b_allocd);
-
- /* newly allocated page frames below buffer header or ...*/
- if (bh->b_data == b_data + b_allocd) {
- bh->b_size += b_allocd;
- bh->b_data -= b_allocd;
- if (full)
- atomic_add(b_allocd, &bh->b_count);
- continue;
- }
- /* they are above the header */
- if (b_data == bh->b_data + bh->b_size) {
- bh->b_size += b_allocd;
- if (full)
- atomic_add(b_allocd, &bh->b_count);
- continue;
- }
- prev_bh = bh;
- bh = kmalloc(sizeof(struct idetape_bh), GFP_KERNEL);
- if (!bh) {
- free_pages((unsigned long) b_data, order);
- goto abort;
- }
- bh->b_reqnext = NULL;
- bh->b_data = b_data;
- bh->b_size = b_allocd;
- atomic_set(&bh->b_count, full ? bh->b_size : 0);
- prev_bh->b_reqnext = bh;
-
- pages &= (order-1);
- }
-
- bh->b_size -= tape->excess_bh_size;
- if (full)
- atomic_sub(tape->excess_bh_size, &bh->b_count);
- return merge_bh;
-abort:
- ide_tape_kfree_buffer(tape);
- return NULL;
-}
+ ide_init_sg_cmd(&cmd, pc->req_xfer);
+ ide_map_sg(drive, &cmd);
-static int idetape_copy_stage_from_user(idetape_tape_t *tape,
- const char __user *buf, int n)
-{
- struct idetape_bh *bh = tape->bh;
- int count;
- int ret = 0;
-
- while (n) {
- if (bh == NULL) {
- printk(KERN_ERR "ide-tape: bh == NULL in %s\n",
- __func__);
- return 1;
- }
- count = min((unsigned int)
- (bh->b_size - atomic_read(&bh->b_count)),
- (unsigned int)n);
- if (copy_from_user(bh->b_data + atomic_read(&bh->b_count), buf,
- count))
- ret = 1;
- n -= count;
- atomic_add(count, &bh->b_count);
- buf += count;
- if (atomic_read(&bh->b_count) == bh->b_size) {
- bh = bh->b_reqnext;
- if (bh)
- atomic_set(&bh->b_count, 0);
- }
- }
- tape->bh = bh;
- return ret;
-}
-
-static int idetape_copy_stage_to_user(idetape_tape_t *tape, char __user *buf,
- int n)
-{
- struct idetape_bh *bh = tape->bh;
- int count;
- int ret = 0;
-
- while (n) {
- if (bh == NULL) {
- printk(KERN_ERR "ide-tape: bh == NULL in %s\n",
- __func__);
- return 1;
- }
- count = min(tape->b_count, n);
- if (copy_to_user(buf, tape->b_data, count))
- ret = 1;
- n -= count;
- tape->b_data += count;
- tape->b_count -= count;
- buf += count;
- if (!tape->b_count) {
- bh = bh->b_reqnext;
- tape->bh = bh;
- if (bh) {
- tape->b_data = bh->b_data;
- tape->b_count = atomic_read(&bh->b_count);
- }
- }
- }
- return ret;
-}
-
-static void idetape_init_merge_buffer(idetape_tape_t *tape)
-{
- struct idetape_bh *bh = tape->merge_bh;
- tape->bh = tape->merge_bh;
-
- if (tape->chrdev_dir == IDETAPE_DIR_WRITE)
- atomic_set(&bh->b_count, 0);
- else {
- tape->b_data = bh->b_data;
- tape->b_count = atomic_read(&bh->b_count);
- }
+ return ide_tape_issue_pc(drive, &cmd, pc);
}
/*
return;
clear_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags);
- tape->merge_bh_size = 0;
- if (tape->merge_bh != NULL) {
- ide_tape_kfree_buffer(tape);
- tape->merge_bh = NULL;
+ tape->valid = 0;
+ if (tape->buf != NULL) {
+ kfree(tape->buf);
+ tape->buf = NULL;
}
tape->chrdev_dir = IDETAPE_DIR_NONE;
* Generate a read/write request for the block device interface and wait for it
* to be serviced.
*/
-static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int blocks,
- struct idetape_bh *bh)
+static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int size)
{
idetape_tape_t *tape = drive->driver_data;
struct request *rq;
- int ret, errors;
+ int ret;
debug_log(DBG_SENSE, "%s: cmd=%d\n", __func__, cmd);
+ BUG_ON(cmd != REQ_IDETAPE_READ && cmd != REQ_IDETAPE_WRITE);
+ BUG_ON(size < 0 || size % tape->blk_size);
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_SPECIAL;
rq->cmd[13] = cmd;
rq->rq_disk = tape->disk;
- rq->special = (void *)bh;
- rq->sector = tape->first_frame;
- rq->nr_sectors = blocks;
- rq->current_nr_sectors = blocks;
- blk_execute_rq(drive->queue, tape->disk, rq, 0);
- errors = rq->errors;
- ret = tape->blk_size * (blocks - rq->current_nr_sectors);
- blk_put_request(rq);
+ if (size) {
+ ret = blk_rq_map_kern(drive->queue, rq, tape->buf, size,
+ __GFP_WAIT);
+ if (ret)
+ goto out_put;
+ }
- if ((cmd & (REQ_IDETAPE_READ | REQ_IDETAPE_WRITE)) == 0)
- return 0;
+ blk_execute_rq(drive->queue, tape->disk, rq, 0);
- if (tape->merge_bh)
- idetape_init_merge_buffer(tape);
- if (errors == IDE_DRV_ERROR_GENERAL)
- return -EIO;
+ /* calculate the number of transferred bytes and update buffer state */
+ size -= rq->resid_len;
+ tape->cur = tape->buf;
+ if (cmd == REQ_IDETAPE_READ)
+ tape->valid = size;
+ else
+ tape->valid = 0;
+
+ ret = size;
+ if (rq->errors == IDE_DRV_ERROR_GENERAL)
+ ret = -EIO;
+out_put:
+ blk_put_request(rq);
return ret;
}
pc->flags |= PC_FLAG_WAIT_FOR_DSC;
}
-/* Queue up a character device originated write request. */
-static int idetape_add_chrdev_write_request(ide_drive_t *drive, int blocks)
-{
- idetape_tape_t *tape = drive->driver_data;
-
- debug_log(DBG_CHRDEV, "Enter %s\n", __func__);
-
- return idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE,
- blocks, tape->merge_bh);
-}
-
static void ide_tape_flush_merge_buffer(ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
- int blocks, min;
- struct idetape_bh *bh;
if (tape->chrdev_dir != IDETAPE_DIR_WRITE) {
printk(KERN_ERR "ide-tape: bug: Trying to empty merge buffer"
" but we are not writing.\n");
return;
}
- if (tape->merge_bh_size > tape->buffer_size) {
- printk(KERN_ERR "ide-tape: bug: merge_buffer too big\n");
- tape->merge_bh_size = tape->buffer_size;
- }
- if (tape->merge_bh_size) {
- blocks = tape->merge_bh_size / tape->blk_size;
- if (tape->merge_bh_size % tape->blk_size) {
- unsigned int i;
-
- blocks++;
- i = tape->blk_size - tape->merge_bh_size %
- tape->blk_size;
- bh = tape->bh->b_reqnext;
- while (bh) {
- atomic_set(&bh->b_count, 0);
- bh = bh->b_reqnext;
- }
- bh = tape->bh;
- while (i) {
- if (bh == NULL) {
- printk(KERN_INFO "ide-tape: bug,"
- " bh NULL\n");
- break;
- }
- min = min(i, (unsigned int)(bh->b_size -
- atomic_read(&bh->b_count)));
- memset(bh->b_data + atomic_read(&bh->b_count),
- 0, min);
- atomic_add(min, &bh->b_count);
- i -= min;
- bh = bh->b_reqnext;
- }
- }
- (void) idetape_add_chrdev_write_request(drive, blocks);
- tape->merge_bh_size = 0;
- }
- if (tape->merge_bh != NULL) {
- ide_tape_kfree_buffer(tape);
- tape->merge_bh = NULL;
+ if (tape->buf) {
+ size_t aligned = roundup(tape->valid, tape->blk_size);
+
+ memset(tape->cur, 0, aligned - tape->valid);
+ idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, aligned);
+ kfree(tape->buf);
+ tape->buf = NULL;
}
tape->chrdev_dir = IDETAPE_DIR_NONE;
}
-static int idetape_init_read(ide_drive_t *drive)
+static int idetape_init_rw(ide_drive_t *drive, int dir)
{
idetape_tape_t *tape = drive->driver_data;
- int bytes_read;
+ int rc;
- /* Initialize read operation */
- if (tape->chrdev_dir != IDETAPE_DIR_READ) {
- if (tape->chrdev_dir == IDETAPE_DIR_WRITE) {
- ide_tape_flush_merge_buffer(drive);
- idetape_flush_tape_buffers(drive);
- }
- if (tape->merge_bh || tape->merge_bh_size) {
- printk(KERN_ERR "ide-tape: merge_bh_size should be"
- " 0 now\n");
- tape->merge_bh_size = 0;
- }
- tape->merge_bh = ide_tape_kmalloc_buffer(tape, 0, 0);
- if (!tape->merge_bh)
- return -ENOMEM;
- tape->chrdev_dir = IDETAPE_DIR_READ;
+ BUG_ON(dir != IDETAPE_DIR_READ && dir != IDETAPE_DIR_WRITE);
- /*
- * Issue a read 0 command to ensure that DSC handshake is
- * switched from completion mode to buffer available mode.
- * No point in issuing this if DSC overlap isn't supported, some
- * drives (Seagate STT3401A) will return an error.
- */
- if (drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) {
- bytes_read = idetape_queue_rw_tail(drive,
- REQ_IDETAPE_READ, 0,
- tape->merge_bh);
- if (bytes_read < 0) {
- ide_tape_kfree_buffer(tape);
- tape->merge_bh = NULL;
- tape->chrdev_dir = IDETAPE_DIR_NONE;
- return bytes_read;
- }
- }
- }
+ if (tape->chrdev_dir == dir)
+ return 0;
- return 0;
-}
+ if (tape->chrdev_dir == IDETAPE_DIR_READ)
+ ide_tape_discard_merge_buffer(drive, 1);
+ else if (tape->chrdev_dir == IDETAPE_DIR_WRITE) {
+ ide_tape_flush_merge_buffer(drive);
+ idetape_flush_tape_buffers(drive);
+ }
-/* called from idetape_chrdev_read() to service a chrdev read request. */
-static int idetape_add_chrdev_read_request(ide_drive_t *drive, int blocks)
-{
- idetape_tape_t *tape = drive->driver_data;
+ if (tape->buf || tape->valid) {
+ printk(KERN_ERR "ide-tape: valid should be 0 now\n");
+ tape->valid = 0;
+ }
- debug_log(DBG_PROCS, "Enter %s, %d blocks\n", __func__, blocks);
+ tape->buf = kmalloc(tape->buffer_size, GFP_KERNEL);
+ if (!tape->buf)
+ return -ENOMEM;
+ tape->chrdev_dir = dir;
+ tape->cur = tape->buf;
- /* If we are at a filemark, return a read length of 0 */
- if (test_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags))
- return 0;
-
- idetape_init_read(drive);
+ /*
+ * Issue a 0 rw command to ensure that DSC handshake is
+ * switched from completion mode to buffer available mode. No
+ * point in issuing this if DSC overlap isn't supported, some
+ * drives (Seagate STT3401A) will return an error.
+ */
+ if (drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) {
+ int cmd = dir == IDETAPE_DIR_READ ? REQ_IDETAPE_READ
+ : REQ_IDETAPE_WRITE;
+
+ rc = idetape_queue_rw_tail(drive, cmd, 0);
+ if (rc < 0) {
+ kfree(tape->buf);
+ tape->buf = NULL;
+ tape->chrdev_dir = IDETAPE_DIR_NONE;
+ return rc;
+ }
+ }
- return idetape_queue_rw_tail(drive, REQ_IDETAPE_READ, blocks,
- tape->merge_bh);
+ return 0;
}
static void idetape_pad_zeros(ide_drive_t *drive, int bcount)
{
idetape_tape_t *tape = drive->driver_data;
- struct idetape_bh *bh;
- int blocks;
+
+ memset(tape->buf, 0, tape->buffer_size);
while (bcount) {
- unsigned int count;
+ unsigned int count = min(tape->buffer_size, bcount);
- bh = tape->merge_bh;
- count = min(tape->buffer_size, bcount);
+ idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, count);
bcount -= count;
- blocks = count / tape->blk_size;
- while (count) {
- atomic_set(&bh->b_count,
- min(count, (unsigned int)bh->b_size));
- memset(bh->b_data, 0, atomic_read(&bh->b_count));
- count -= atomic_read(&bh->b_count);
- bh = bh->b_reqnext;
- }
- idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, blocks,
- tape->merge_bh);
}
}
}
if (tape->chrdev_dir == IDETAPE_DIR_READ) {
- tape->merge_bh_size = 0;
+ tape->valid = 0;
if (test_and_clear_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags))
++count;
ide_tape_discard_merge_buffer(drive, 0);
{
struct ide_tape_obj *tape = file->private_data;
ide_drive_t *drive = tape->drive;
- ssize_t bytes_read, temp, actually_read = 0, rc;
+ size_t done = 0;
ssize_t ret = 0;
- u16 ctl = *(u16 *)&tape->caps[12];
+ int rc;
debug_log(DBG_CHRDEV, "Enter %s, count %Zd\n", __func__, count);
(count % tape->blk_size) == 0)
tape->user_bs_factor = count / tape->blk_size;
}
- rc = idetape_init_read(drive);
+
+ rc = idetape_init_rw(drive, IDETAPE_DIR_READ);
if (rc < 0)
return rc;
- if (count == 0)
- return (0);
- if (tape->merge_bh_size) {
- actually_read = min((unsigned int)(tape->merge_bh_size),
- (unsigned int)count);
- if (idetape_copy_stage_to_user(tape, buf, actually_read))
- ret = -EFAULT;
- buf += actually_read;
- tape->merge_bh_size -= actually_read;
- count -= actually_read;
- }
- while (count >= tape->buffer_size) {
- bytes_read = idetape_add_chrdev_read_request(drive, ctl);
- if (bytes_read <= 0)
- goto finish;
- if (idetape_copy_stage_to_user(tape, buf, bytes_read))
- ret = -EFAULT;
- buf += bytes_read;
- count -= bytes_read;
- actually_read += bytes_read;
- }
- if (count) {
- bytes_read = idetape_add_chrdev_read_request(drive, ctl);
- if (bytes_read <= 0)
- goto finish;
- temp = min((unsigned long)count, (unsigned long)bytes_read);
- if (idetape_copy_stage_to_user(tape, buf, temp))
+
+ while (done < count) {
+ size_t todo;
+
+ /* refill if staging buffer is empty */
+ if (!tape->valid) {
+ /* If we are at a filemark, nothing more to read */
+ if (test_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags))
+ break;
+ /* read */
+ if (idetape_queue_rw_tail(drive, REQ_IDETAPE_READ,
+ tape->buffer_size) <= 0)
+ break;
+ }
+
+ /* copy out */
+ todo = min_t(size_t, count - done, tape->valid);
+ if (copy_to_user(buf + done, tape->cur, todo))
ret = -EFAULT;
- actually_read += temp;
- tape->merge_bh_size = bytes_read-temp;
+
+ tape->cur += todo;
+ tape->valid -= todo;
+ done += todo;
}
-finish:
- if (!actually_read && test_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags)) {
+
+ if (!done && test_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags)) {
debug_log(DBG_SENSE, "%s: spacing over filemark\n", tape->name);
idetape_space_over_filemarks(drive, MTFSF, 1);
return 0;
}
- return ret ? ret : actually_read;
+ return ret ? ret : done;
}
static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
{
struct ide_tape_obj *tape = file->private_data;
ide_drive_t *drive = tape->drive;
- ssize_t actually_written = 0;
+ size_t done = 0;
ssize_t ret = 0;
- u16 ctl = *(u16 *)&tape->caps[12];
+ int rc;
/* The drive is write protected. */
if (tape->write_prot)
debug_log(DBG_CHRDEV, "Enter %s, count %Zd\n", __func__, count);
/* Initialize write operation */
- if (tape->chrdev_dir != IDETAPE_DIR_WRITE) {
- if (tape->chrdev_dir == IDETAPE_DIR_READ)
- ide_tape_discard_merge_buffer(drive, 1);
- if (tape->merge_bh || tape->merge_bh_size) {
- printk(KERN_ERR "ide-tape: merge_bh_size "
- "should be 0 now\n");
- tape->merge_bh_size = 0;
- }
- tape->merge_bh = ide_tape_kmalloc_buffer(tape, 0, 0);
- if (!tape->merge_bh)
- return -ENOMEM;
- tape->chrdev_dir = IDETAPE_DIR_WRITE;
- idetape_init_merge_buffer(tape);
+ rc = idetape_init_rw(drive, IDETAPE_DIR_WRITE);
+ if (rc < 0)
+ return rc;
- /*
- * Issue a write 0 command to ensure that DSC handshake is
- * switched from completion mode to buffer available mode. No
- * point in issuing this if DSC overlap isn't supported, some
- * drives (Seagate STT3401A) will return an error.
- */
- if (drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) {
- ssize_t retval = idetape_queue_rw_tail(drive,
- REQ_IDETAPE_WRITE, 0,
- tape->merge_bh);
- if (retval < 0) {
- ide_tape_kfree_buffer(tape);
- tape->merge_bh = NULL;
- tape->chrdev_dir = IDETAPE_DIR_NONE;
- return retval;
- }
- }
- }
- if (count == 0)
- return (0);
- if (tape->merge_bh_size) {
- if (tape->merge_bh_size >= tape->buffer_size) {
- printk(KERN_ERR "ide-tape: bug: merge buf too big\n");
- tape->merge_bh_size = 0;
- }
- actually_written = min((unsigned int)
- (tape->buffer_size - tape->merge_bh_size),
- (unsigned int)count);
- if (idetape_copy_stage_from_user(tape, buf, actually_written))
- ret = -EFAULT;
- buf += actually_written;
- tape->merge_bh_size += actually_written;
- count -= actually_written;
-
- if (tape->merge_bh_size == tape->buffer_size) {
- ssize_t retval;
- tape->merge_bh_size = 0;
- retval = idetape_add_chrdev_write_request(drive, ctl);
- if (retval <= 0)
- return (retval);
- }
- }
- while (count >= tape->buffer_size) {
- ssize_t retval;
- if (idetape_copy_stage_from_user(tape, buf, tape->buffer_size))
- ret = -EFAULT;
- buf += tape->buffer_size;
- count -= tape->buffer_size;
- retval = idetape_add_chrdev_write_request(drive, ctl);
- actually_written += tape->buffer_size;
- if (retval <= 0)
- return (retval);
- }
- if (count) {
- actually_written += count;
- if (idetape_copy_stage_from_user(tape, buf, count))
+ while (done < count) {
+ size_t todo;
+
+ /* flush if staging buffer is full */
+ if (tape->valid == tape->buffer_size &&
+ idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE,
+ tape->buffer_size) <= 0)
+ return rc;
+
+ /* copy in */
+ todo = min_t(size_t, count - done,
+ tape->buffer_size - tape->valid);
+ if (copy_from_user(tape->cur, buf + done, todo))
ret = -EFAULT;
- tape->merge_bh_size += count;
+
+ tape->cur += todo;
+ tape->valid += todo;
+ done += todo;
}
- return ret ? ret : actually_written;
+
+ return ret ? ret : done;
}
static int idetape_write_filemark(ide_drive_t *drive)
idetape_flush_tape_buffers(drive);
}
if (cmd == MTIOCGET || cmd == MTIOCPOS) {
- block_offset = tape->merge_bh_size /
+ block_offset = tape->valid /
(tape->blk_size * tape->user_bs_factor);
position = idetape_read_position(drive);
if (position < 0)
idetape_tape_t *tape = drive->driver_data;
ide_tape_flush_merge_buffer(drive);
- tape->merge_bh = ide_tape_kmalloc_buffer(tape, 1, 0);
- if (tape->merge_bh != NULL) {
+ tape->buf = kmalloc(tape->buffer_size, GFP_KERNEL);
+ if (tape->buf != NULL) {
idetape_pad_zeros(drive, tape->blk_size *
(tape->user_bs_factor - 1));
- ide_tape_kfree_buffer(tape);
- tape->merge_bh = NULL;
+ kfree(tape->buf);
+ tape->buf = NULL;
}
idetape_write_filemark(drive);
idetape_flush_tape_buffers(drive);
u16 *ctl = (u16 *)&tape->caps[12];
drive->pc_callback = ide_tape_callback;
- drive->pc_update_buffers = idetape_update_buffers;
- drive->pc_io_buffers = ide_tape_io_buffers;
drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP;
tape->buffer_size = *ctl * tape->blk_size;
}
buffer_size = tape->buffer_size;
- tape->pages_per_buffer = buffer_size / PAGE_SIZE;
- if (buffer_size % PAGE_SIZE) {
- tape->pages_per_buffer++;
- tape->excess_bh_size = PAGE_SIZE - buffer_size % PAGE_SIZE;
- }
/* select the "best" DSC read/write polling freq */
speed = max(*(u16 *)&tape->caps[14], *(u16 *)&tape->caps[8]);
ide_drive_t *drive = tape->drive;
struct gendisk *g = tape->disk;
- BUG_ON(tape->merge_bh_size);
+ BUG_ON(tape->valid);
drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
drive->driver_data = NULL;
if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
ide_finish_cmd(drive, cmd, stat);
else
- ide_complete_rq(drive, 0, cmd->rq->nr_sectors << 9);
+ ide_complete_rq(drive, 0, blk_rq_sectors(cmd->rq) << 9);
return ide_stopped;
out_err:
ide_error_cmd(drive, cmd);
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
- rq->buffer = buf;
+
+ if (cmd->tf_flags & IDE_TFLAG_WRITE)
+ rq->cmd_flags |= REQ_RW;
/*
* (ks) We transfer currently only whole sectors.
* if we would find a solution to transfer any size.
* To support special commands like READ LONG.
*/
- rq->hard_nr_sectors = rq->nr_sectors = nsect;
- rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
-
- if (cmd->tf_flags & IDE_TFLAG_WRITE)
- rq->cmd_flags |= REQ_RW;
+ if (nsect) {
+ error = blk_rq_map_kern(drive->queue, rq, buf,
+ nsect * SECTOR_SIZE, __GFP_WAIT);
+ if (error)
+ goto put_req;
+ }
rq->special = cmd;
cmd->rq = rq;
error = blk_execute_rq(drive->queue, NULL, rq, 0);
- blk_put_request(rq);
+put_req:
+ blk_put_request(rq);
return error;
}
u8 clock = inb(high_16 + 0x11);
outb(clock | (hwif->channel ? 0x08 : 0x02), high_16 + 0x11);
- word_count = (rq->nr_sectors << 8);
+ word_count = (blk_rq_sectors(rq) << 8);
word_count = (rq_data_dir(rq) == READ) ?
word_count | 0x05000000 :
word_count | 0x06000000;
ide_hwif_t *hwif = drive->hwif;
unsigned long sc_base = hwif->config_data;
unsigned long twcr_port = sc_base + (drive->dn ? 0x06 : 0x04);
- unsigned long nsectors = hwif->rq->nr_sectors;
+ unsigned long nsectors = blk_rq_sectors(hwif->rq);
/*
* We have to manually load the sector count and size into
tx4939ide_writew(SECTOR_SIZE / 2, base, drive->dn ?
TX4939IDE_Xfer_Cnt_2 : TX4939IDE_Xfer_Cnt_1);
- tx4939ide_writew(cmd->rq->nr_sectors, base, TX4939IDE_Sec_Cnt);
+ tx4939ide_writew(blk_rq_sectors(cmd->rq), base, TX4939IDE_Sec_Cnt);
return 0;
}
msb->req_sg);
if (!msb->seg_count) {
- chunk = __blk_end_request(msb->block_req, -ENOMEM,
- blk_rq_cur_bytes(msb->block_req));
+ chunk = __blk_end_request_cur(msb->block_req, -ENOMEM);
continue;
}
- t_sec = msb->block_req->sector << 9;
+ t_sec = blk_rq_pos(msb->block_req) << 9;
sector_div(t_sec, msb->page_size);
- count = msb->block_req->nr_sectors << 9;
+ count = blk_rq_bytes(msb->block_req);
count /= msb->page_size;
param.system = msb->system;
return 0;
}
- dev_dbg(&card->dev, "elv_next\n");
- msb->block_req = elv_next_request(msb->queue);
+ dev_dbg(&card->dev, "blk_fetch\n");
+ msb->block_req = blk_fetch_request(msb->queue);
if (!msb->block_req) {
dev_dbg(&card->dev, "issue end\n");
return -EAGAIN;
t_len *= msb->page_size;
}
} else
- t_len = msb->block_req->nr_sectors << 9;
+ t_len = blk_rq_bytes(msb->block_req);
dev_dbg(&card->dev, "transferred %x (%d)\n", t_len, error);
return;
if (msb->eject) {
- while ((req = elv_next_request(q)) != NULL)
- __blk_end_request(req, -ENODEV, blk_rq_bytes(req));
+ while ((req = blk_fetch_request(q)) != NULL)
+ __blk_end_request_all(req, -ENODEV);
return;
}
/* do we need to support multiple segments? */
if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) {
printk(MYIOC_s_ERR_FMT "%s: multiple segments req %u %u, rsp %u %u\n",
- ioc->name, __func__, req->bio->bi_vcnt, req->data_len,
- rsp->bio->bi_vcnt, rsp->data_len);
+ ioc->name, __func__, req->bio->bi_vcnt, blk_rq_bytes(req),
+ rsp->bio->bi_vcnt, blk_rq_bytes(rsp));
return -EINVAL;
}
smpreq = (SmpPassthroughRequest_t *)mf;
memset(smpreq, 0, sizeof(*smpreq));
- smpreq->RequestDataLength = cpu_to_le16(req->data_len - 4);
+ smpreq->RequestDataLength = cpu_to_le16(blk_rq_bytes(req) - 4);
smpreq->Function = MPI_FUNCTION_SMP_PASSTHROUGH;
if (rphy)
MPI_SGE_FLAGS_END_OF_BUFFER |
MPI_SGE_FLAGS_DIRECTION |
mpt_addr_size()) << MPI_SGE_FLAGS_SHIFT;
- flagsLength |= (req->data_len - 4);
+ flagsLength |= (blk_rq_bytes(req) - 4);
dma_addr_out = pci_map_single(ioc->pcidev, bio_data(req->bio),
- req->data_len, PCI_DMA_BIDIRECTIONAL);
+ blk_rq_bytes(req), PCI_DMA_BIDIRECTIONAL);
if (!dma_addr_out)
goto put_mf;
mpt_add_sge(psge, flagsLength, dma_addr_out);
/* response */
flagsLength = MPT_SGE_FLAGS_SSIMPLE_READ;
- flagsLength |= rsp->data_len + 4;
+ flagsLength |= blk_rq_bytes(rsp) + 4;
dma_addr_in = pci_map_single(ioc->pcidev, bio_data(rsp->bio),
- rsp->data_len, PCI_DMA_BIDIRECTIONAL);
+ blk_rq_bytes(rsp), PCI_DMA_BIDIRECTIONAL);
if (!dma_addr_in)
goto unmap;
mpt_add_sge(psge, flagsLength, dma_addr_in);
smprep = (SmpPassthroughReply_t *)ioc->sas_mgmt.reply;
memcpy(req->sense, smprep, sizeof(*smprep));
req->sense_len = sizeof(*smprep);
- req->data_len = 0;
- rsp->data_len -= smprep->ResponseDataLength;
+ req->resid_len = 0;
+ rsp->resid_len -= smprep->ResponseDataLength;
} else {
printk(MYIOC_s_ERR_FMT "%s: smp passthru reply failed to be returned\n",
ioc->name, __func__);
}
unmap:
if (dma_addr_out)
- pci_unmap_single(ioc->pcidev, dma_addr_out, req->data_len,
+ pci_unmap_single(ioc->pcidev, dma_addr_out, blk_rq_bytes(req),
PCI_DMA_BIDIRECTIONAL);
if (dma_addr_in)
- pci_unmap_single(ioc->pcidev, dma_addr_in, rsp->data_len,
+ pci_unmap_single(ioc->pcidev, dma_addr_in, blk_rq_bytes(rsp),
PCI_DMA_BIDIRECTIONAL);
put_mf:
if (mf)
struct request_queue *q = req->q;
unsigned long flags;
- if (blk_end_request(req, error, nr_bytes)) {
- int leftover = (req->hard_nr_sectors << KERNEL_SECTOR_SHIFT);
-
- if (blk_pc_request(req))
- leftover = req->data_len;
-
+ if (blk_end_request(req, error, nr_bytes))
if (error)
- blk_end_request(req, -EIO, leftover);
- }
+ blk_end_request_all(req, -EIO);
spin_lock_irqsave(q->queue_lock, flags);
break;
case CACHE_SMARTFETCH:
- if (req->nr_sectors > 16)
+ if (blk_rq_sectors(req) > 16)
ctl_flags = 0x201F0008;
else
ctl_flags = 0x001F0000;
ctl_flags = 0x001F0010;
break;
case CACHE_SMARTBACK:
- if (req->nr_sectors > 16)
+ if (blk_rq_sectors(req) > 16)
ctl_flags = 0x001F0004;
else
ctl_flags = 0x001F0010;
break;
case CACHE_SMARTTHROUGH:
- if (req->nr_sectors > 16)
+ if (blk_rq_sectors(req) > 16)
ctl_flags = 0x001F0004;
else
ctl_flags = 0x001F0010;
*mptr++ = cpu_to_le32(scsi_flags);
- *((u32 *) & cmd[2]) = cpu_to_be32(req->sector * hwsec);
- *((u16 *) & cmd[7]) = cpu_to_be16(req->nr_sectors * hwsec);
+ *((u32 *) & cmd[2]) = cpu_to_be32(blk_rq_pos(req) * hwsec);
+ *((u16 *) & cmd[7]) = cpu_to_be16(blk_rq_sectors(req) * hwsec);
memcpy(mptr, cmd, 10);
mptr += 4;
- *mptr++ = cpu_to_le32(req->nr_sectors << KERNEL_SECTOR_SHIFT);
+ *mptr++ = cpu_to_le32(blk_rq_bytes(req));
} else
#endif
{
msg->u.head[1] = cpu_to_le32(cmd | HOST_TID << 12 | tid);
*mptr++ = cpu_to_le32(ctl_flags);
- *mptr++ = cpu_to_le32(req->nr_sectors << KERNEL_SECTOR_SHIFT);
+ *mptr++ = cpu_to_le32(blk_rq_bytes(req));
*mptr++ =
- cpu_to_le32((u32) (req->sector << KERNEL_SECTOR_SHIFT));
+ cpu_to_le32((u32) (blk_rq_pos(req) << KERNEL_SECTOR_SHIFT));
*mptr++ =
- cpu_to_le32(req->sector >> (32 - KERNEL_SECTOR_SHIFT));
+ cpu_to_le32(blk_rq_pos(req) >> (32 - KERNEL_SECTOR_SHIFT));
}
if (!i2o_block_sglist_alloc(c, ireq, &mptr)) {
struct request *req;
while (!blk_queue_plugged(q)) {
- req = elv_next_request(q);
+ req = blk_peek_request(q);
if (!req)
break;
if (queue_depth < I2O_BLOCK_MAX_OPEN_REQUESTS) {
if (!i2o_block_transfer(req)) {
- blkdev_dequeue_request(req);
+ blk_start_request(req);
continue;
} else
osm_info("transfer error\n");
blk_stop_queue(q);
break;
}
- } else
- end_request(req, 0);
+ } else {
+ blk_start_request(req);
+ __blk_end_request_all(req, -EIO);
+ }
}
};
brq.mrq.cmd = &brq.cmd;
brq.mrq.data = &brq.data;
- brq.cmd.arg = req->sector;
+ brq.cmd.arg = blk_rq_pos(req);
if (!mmc_card_blockaddr(card))
brq.cmd.arg <<= 9;
brq.cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
brq.stop.opcode = MMC_STOP_TRANSMISSION;
brq.stop.arg = 0;
brq.stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
- brq.data.blocks = req->nr_sectors;
+ brq.data.blocks = blk_rq_sectors(req);
/*
* The block layer doesn't support all sector count
* Adjust the sg list so it is the same size as the
* request.
*/
- if (brq.data.blocks != req->nr_sectors) {
+ if (brq.data.blocks != blk_rq_sectors(req)) {
int i, data_size = brq.data.blocks << 9;
struct scatterlist *sg;
printk(KERN_ERR "%s: error %d transferring data,"
" sector %u, nr %u, card status %#x\n",
req->rq_disk->disk_name, brq.data.error,
- (unsigned)req->sector,
- (unsigned)req->nr_sectors, status);
+ (unsigned)blk_rq_pos(req),
+ (unsigned)blk_rq_sectors(req), status);
}
if (brq.stop.error) {
spin_lock_irq(q->queue_lock);
set_current_state(TASK_INTERRUPTIBLE);
if (!blk_queue_plugged(q))
- req = elv_next_request(q);
+ req = blk_fetch_request(q);
mq->req = req;
spin_unlock_irq(q->queue_lock);
{
struct mmc_queue *mq = q->queuedata;
struct request *req;
- int ret;
if (!mq) {
printk(KERN_ERR "MMC: killing requests for dead queue\n");
- while ((req = elv_next_request(q)) != NULL) {
- do {
- ret = __blk_end_request(req, -EIO,
- blk_rq_cur_bytes(req));
- } while (ret);
- }
+ while ((req = blk_fetch_request(q)) != NULL)
+ __blk_end_request_all(req, -EIO);
return;
}
unsigned long block, nsect;
char *buf;
- block = req->sector << 9 >> tr->blkshift;
- nsect = req->current_nr_sectors << 9 >> tr->blkshift;
+ block = blk_rq_pos(req) << 9 >> tr->blkshift;
+ nsect = blk_rq_cur_bytes(req) >> tr->blkshift;
buf = req->buffer;
if (req->cmd_type == REQ_TYPE_LINUX_BLOCK &&
req->cmd[0] == REQ_LB_OP_DISCARD)
- return !tr->discard(dev, block, nsect);
+ return tr->discard(dev, block, nsect);
if (!blk_fs_request(req))
- return 0;
+ return -EIO;
- if (req->sector + req->current_nr_sectors > get_capacity(req->rq_disk))
- return 0;
+ if (blk_rq_pos(req) + blk_rq_cur_sectors(req) >
+ get_capacity(req->rq_disk))
+ return -EIO;
switch(rq_data_dir(req)) {
case READ:
for (; nsect > 0; nsect--, block++, buf += tr->blksize)
if (tr->readsect(dev, block, buf))
- return 0;
- return 1;
+ return -EIO;
+ return 0;
case WRITE:
if (!tr->writesect)
- return 0;
+ return -EIO;
for (; nsect > 0; nsect--, block++, buf += tr->blksize)
if (tr->writesect(dev, block, buf))
- return 0;
- return 1;
+ return -EIO;
+ return 0;
default:
printk(KERN_NOTICE "Unknown request %u\n", rq_data_dir(req));
- return 0;
+ return -EIO;
}
}
{
struct mtd_blktrans_ops *tr = arg;
struct request_queue *rq = tr->blkcore_priv->rq;
+ struct request *req = NULL;
/* we might get involved when memory gets low, so use PF_MEMALLOC */
current->flags |= PF_MEMALLOC;
spin_lock_irq(rq->queue_lock);
+
while (!kthread_should_stop()) {
- struct request *req;
struct mtd_blktrans_dev *dev;
- int res = 0;
-
- req = elv_next_request(rq);
+ int res;
- if (!req) {
+ if (!req && !(req = blk_fetch_request(rq))) {
set_current_state(TASK_INTERRUPTIBLE);
spin_unlock_irq(rq->queue_lock);
schedule();
spin_lock_irq(rq->queue_lock);
- end_request(req, res);
+ if (!__blk_end_request_cur(req, res))
+ req = NULL;
}
+
+ if (req)
+ __blk_end_request_all(req, -EIO);
+
spin_unlock_irq(rq->queue_lock);
return 0;
if (dasd_profile_level != DASD_PROFILE_ON)
return;
- sectors = req->nr_sectors;
+ sectors = blk_rq_sectors(req);
if (!cqr->buildclk || !cqr->startclk ||
!cqr->stopclk || !cqr->endclk ||
!sectors)
del_timer(&block->timer);
}
-/*
- * posts the buffer_cache about a finalized request
- */
-static inline void dasd_end_request(struct request *req, int error)
-{
- if (__blk_end_request(req, error, blk_rq_bytes(req)))
- BUG();
-}
-
/*
* Process finished error recovery ccw.
*/
if (basedev->state < DASD_STATE_READY)
return;
/* Now we try to fetch requests from the request queue */
- while (!blk_queue_plugged(queue) &&
- elv_next_request(queue)) {
-
- req = elv_next_request(queue);
-
+ while (!blk_queue_plugged(queue) && (req = blk_peek_request(queue))) {
if (basedev->features & DASD_FEATURE_READONLY &&
rq_data_dir(req) == WRITE) {
DBF_DEV_EVENT(DBF_ERR, basedev,
"Rejecting write request %p",
req);
- blkdev_dequeue_request(req);
- dasd_end_request(req, -EIO);
+ blk_start_request(req);
+ __blk_end_request_all(req, -EIO);
continue;
}
cqr = basedev->discipline->build_cp(basedev, block, req);
"CCW creation failed (rc=%ld) "
"on request %p",
PTR_ERR(cqr), req);
- blkdev_dequeue_request(req);
- dasd_end_request(req, -EIO);
+ blk_start_request(req);
+ __blk_end_request_all(req, -EIO);
continue;
}
/*
*/
cqr->callback_data = (void *) req;
cqr->status = DASD_CQR_FILLED;
- blkdev_dequeue_request(req);
+ blk_start_request(req);
list_add_tail(&cqr->blocklist, &block->ccw_queue);
dasd_profile_start(block, cqr, req);
}
status = cqr->block->base->discipline->free_cp(cqr, req);
if (status <= 0)
error = status ? status : -EIO;
- dasd_end_request(req, error);
+ __blk_end_request_all(req, error);
}
/*
return;
spin_lock_irq(&block->request_queue_lock);
- while ((req = elv_next_request(block->request_queue))) {
- blkdev_dequeue_request(req);
- dasd_end_request(req, -EIO);
- }
+ while ((req = blk_fetch_request(block->request_queue)))
+ __blk_end_request_all(req, -EIO);
spin_unlock_irq(&block->request_queue_lock);
}
return ERR_PTR(-EINVAL);
blksize = block->bp_block;
/* Calculate record id of first and last block. */
- first_rec = req->sector >> block->s2b_shift;
- last_rec = (req->sector + req->nr_sectors - 1) >> block->s2b_shift;
+ first_rec = blk_rq_pos(req) >> block->s2b_shift;
+ last_rec =
+ (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
/* Check struct bio and count the number of blocks for the request. */
count = 0;
rq_for_each_segment(bv, req, iter) {
blksize = block->bp_block;
blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
/* Calculate record id of first and last block. */
- first_rec = first_trk = req->sector >> block->s2b_shift;
+ first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
first_offs = sector_div(first_trk, blk_per_trk);
last_rec = last_trk =
- (req->sector + req->nr_sectors - 1) >> block->s2b_shift;
+ (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
last_offs = sector_div(last_trk, blk_per_trk);
cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk);
private = (struct dasd_eckd_private *) cqr->block->base->private;
blksize = cqr->block->bp_block;
blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
- recid = req->sector >> cqr->block->s2b_shift;
+ recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
ccw = cqr->cpaddr;
/* Skip over define extent & locate record. */
ccw++;
return ERR_PTR(-EINVAL);
blksize = block->bp_block;
/* Calculate record id of first and last block. */
- first_rec = req->sector >> block->s2b_shift;
- last_rec = (req->sector + req->nr_sectors - 1) >> block->s2b_shift;
+ first_rec = blk_rq_pos(req) >> block->s2b_shift;
+ last_rec =
+ (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
/* Check struct bio and count the number of blocks for the request. */
count = 0;
cidaw = 0;
ccw = cqr->cpaddr;
/* First ccw is define extent. */
define_extent(ccw++, cqr->data, rq_data_dir(req),
- block->bp_block, req->sector, req->nr_sectors);
+ block->bp_block, blk_rq_pos(req), blk_rq_sectors(req));
/* Build locate_record + read/write ccws. */
idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data));
LO_data = (struct LO_fba_data *) (idaws + cidaw);
/* Setup ccws. */
request->op = TO_BLOCK;
start_block = (struct tape_34xx_block_id *) request->cpdata;
- start_block->block = req->sector >> TAPEBLOCK_HSEC_S2B;
+ start_block->block = blk_rq_pos(req) >> TAPEBLOCK_HSEC_S2B;
DBF_EVENT(6, "start_block = %i\n", start_block->block);
ccw = request->cpaddr;
struct req_iterator iter;
DBF_EVENT(6, "xBREDid:");
- start_block = req->sector >> TAPEBLOCK_HSEC_S2B;
+ start_block = blk_rq_pos(req) >> TAPEBLOCK_HSEC_S2B;
DBF_EVENT(6, "start_block = %i\n", start_block);
rq_for_each_segment(bv, req, iter)
/*
* Post finished request.
*/
-static void
-tapeblock_end_request(struct request *req, int error)
-{
- if (blk_end_request(req, error, blk_rq_bytes(req)))
- BUG();
-}
-
static void
__tapeblock_end_request(struct tape_request *ccw_req, void *data)
{
device = ccw_req->device;
req = (struct request *) data;
- tapeblock_end_request(req, (ccw_req->rc == 0) ? 0 : -EIO);
+ blk_end_request_all(req, (ccw_req->rc == 0) ? 0 : -EIO);
if (ccw_req->rc == 0)
/* Update position. */
device->blk_data.block_position =
- (req->sector + req->nr_sectors) >> TAPEBLOCK_HSEC_S2B;
+ (blk_rq_pos(req) + blk_rq_sectors(req)) >> TAPEBLOCK_HSEC_S2B;
else
/* We lost the position information due to an error. */
device->blk_data.block_position = -1;
device->discipline->free_bread(ccw_req);
if (!list_empty(&device->req_queue) ||
- elv_next_request(device->blk_data.request_queue))
+ blk_peek_request(device->blk_data.request_queue))
tapeblock_trigger_requeue(device);
}
ccw_req = device->discipline->bread(device, req);
if (IS_ERR(ccw_req)) {
DBF_EVENT(1, "TBLOCK: bread failed\n");
- tapeblock_end_request(req, -EIO);
+ blk_end_request_all(req, -EIO);
return PTR_ERR(ccw_req);
}
ccw_req->callback = __tapeblock_end_request;
* Start/enqueueing failed. No retries in
* this case.
*/
- tapeblock_end_request(req, -EIO);
+ blk_end_request_all(req, -EIO);
device->discipline->free_bread(ccw_req);
}
spin_lock_irq(&device->blk_data.request_queue_lock);
while (
!blk_queue_plugged(queue) &&
- elv_next_request(queue) &&
+ (req = blk_fetch_request(queue)) &&
nr_queued < TAPEBLOCK_MIN_REQUEUE
) {
- req = elv_next_request(queue);
if (rq_data_dir(req) == WRITE) {
DBF_EVENT(1, "TBLOCK: Rejecting write request\n");
- blkdev_dequeue_request(req);
spin_unlock_irq(&device->blk_data.request_queue_lock);
- tapeblock_end_request(req, -EIO);
+ blk_end_request_all(req, -EIO);
spin_lock_irq(&device->blk_data.request_queue_lock);
continue;
}
- blkdev_dequeue_request(req);
nr_queued++;
spin_unlock_irq(&device->blk_data.request_queue_lock);
rc = tapeblock_start_request(device, req);
{
struct request *req;
- while ((req = elv_next_request(q)) != NULL) {
+ req = blk_fetch_request(q);
+ while (req) {
struct jsfd_part *jdp = req->rq_disk->private_data;
- unsigned long offset = req->sector << 9;
- size_t len = req->current_nr_sectors << 9;
+ unsigned long offset = blk_rq_pos(req) << 9;
+ size_t len = blk_rq_cur_bytes(req);
+ int err = -EIO;
- if ((offset + len) > jdp->dsize) {
- end_request(req, 0);
- continue;
- }
+ if ((offset + len) > jdp->dsize)
+ goto end;
if (rq_data_dir(req) != READ) {
printk(KERN_ERR "jsfd: write\n");
- end_request(req, 0);
- continue;
+ goto end;
}
if ((jdp->dbase & 0xff000000) != 0x20000000) {
printk(KERN_ERR "jsfd: bad base %x\n", (int)jdp->dbase);
- end_request(req, 0);
- continue;
+ goto end;
}
jsfd_read(req->buffer, jdp->dbase + offset, len);
-
- end_request(req, 1);
+ err = 0;
+ end:
+ if (!__blk_end_request_cur(req, err))
+ req = blk_fetch_request(q);
}
}
if (linked_comm && SCpnt->device->queue_depth > 2
&& TLDEV(SCpnt->device->type)) {
ha->cp_stat[i] = READY;
- flush_dev(SCpnt->device, SCpnt->request->sector, ha, 0);
+ flush_dev(SCpnt->device, blk_rq_pos(SCpnt->request), ha, 0);
return 0;
}
if (!cpp->din)
input_only = 0;
- if (SCpnt->request->sector < minsec)
- minsec = SCpnt->request->sector;
- if (SCpnt->request->sector > maxsec)
- maxsec = SCpnt->request->sector;
+ if (blk_rq_pos(SCpnt->request) < minsec)
+ minsec = blk_rq_pos(SCpnt->request);
+ if (blk_rq_pos(SCpnt->request) > maxsec)
+ maxsec = blk_rq_pos(SCpnt->request);
- sl[n] = SCpnt->request->sector;
- ioseek += SCpnt->request->nr_sectors;
+ sl[n] = blk_rq_pos(SCpnt->request);
+ ioseek += blk_rq_sectors(SCpnt->request);
if (!n)
continue;
k = il[n];
cpp = &ha->cp[k];
SCpnt = cpp->SCpnt;
- ll[n] = SCpnt->request->nr_sectors;
+ ll[n] = blk_rq_sectors(SCpnt->request);
pl[n] = SCpnt->serial_number;
if (!n)
cpp = &ha->cp[k];
SCpnt = cpp->SCpnt;
scmd_printk(KERN_INFO, SCpnt,
- "%s pid %ld mb %d fc %d nr %d sec %ld ns %ld"
+ "%s pid %ld mb %d fc %d nr %d sec %ld ns %u"
" cur %ld s:%c r:%c rev:%c in:%c ov:%c xd %d.\n",
(ihdlr ? "ihdlr" : "qcomm"),
SCpnt->serial_number, k, flushcount,
- n_ready, SCpnt->request->sector,
- SCpnt->request->nr_sectors, cursec, YESNO(s),
+ n_ready, blk_rq_pos(SCpnt->request),
+ blk_rq_sectors(SCpnt->request), cursec, YESNO(s),
YESNO(r), YESNO(rev), YESNO(input_only),
YESNO(overlap), cpp->din);
}
if (linked_comm && SCpnt->device->queue_depth > 2
&& TLDEV(SCpnt->device->type))
- flush_dev(SCpnt->device, SCpnt->request->sector, ha, 1);
+ flush_dev(SCpnt->device, blk_rq_pos(SCpnt->request), ha, 1);
tstatus = status_byte(spp->target_status);
/* do we need to support multiple segments? */
if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) {
printk("%s: multiple segments req %u %u, rsp %u %u\n",
- __func__, req->bio->bi_vcnt, req->data_len,
- rsp->bio->bi_vcnt, rsp->data_len);
+ __func__, req->bio->bi_vcnt, blk_rq_bytes(req),
+ rsp->bio->bi_vcnt, blk_rq_bytes(rsp));
return -EINVAL;
}
- ret = smp_execute_task(dev, bio_data(req->bio), req->data_len,
- bio_data(rsp->bio), rsp->data_len);
+ ret = smp_execute_task(dev, bio_data(req->bio), blk_rq_bytes(req),
+ bio_data(rsp->bio), blk_rq_bytes(rsp));
if (ret > 0) {
/* positive number is the untransferred residual */
- rsp->data_len = ret;
- req->data_len = 0;
+ rsp->resid_len = ret;
+ req->resid_len = 0;
ret = 0;
} else if (ret == 0) {
- rsp->data_len = 0;
- req->data_len = 0;
+ rsp->resid_len = 0;
+ req->resid_len = 0;
}
return ret;
{
u8 *req_data = NULL, *resp_data = NULL, *buf;
struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
- int error = -EINVAL, resp_data_len = rsp->data_len;
+ int error = -EINVAL;
/* eight is the minimum size for request and response frames */
- if (req->data_len < 8 || rsp->data_len < 8)
+ if (blk_rq_bytes(req) < 8 || blk_rq_bytes(rsp) < 8)
goto out;
- if (bio_offset(req->bio) + req->data_len > PAGE_SIZE ||
- bio_offset(rsp->bio) + rsp->data_len > PAGE_SIZE) {
+ if (bio_offset(req->bio) + blk_rq_bytes(req) > PAGE_SIZE ||
+ bio_offset(rsp->bio) + blk_rq_bytes(rsp) > PAGE_SIZE) {
shost_printk(KERN_ERR, shost,
"SMP request/response frame crosses page boundary");
goto out;
}
- req_data = kzalloc(req->data_len, GFP_KERNEL);
+ req_data = kzalloc(blk_rq_bytes(req), GFP_KERNEL);
/* make sure frame can always be built ... we copy
* back only the requested length */
- resp_data = kzalloc(max(rsp->data_len, 128U), GFP_KERNEL);
+ resp_data = kzalloc(max(blk_rq_bytes(rsp), 128U), GFP_KERNEL);
if (!req_data || !resp_data) {
error = -ENOMEM;
local_irq_disable();
buf = kmap_atomic(bio_page(req->bio), KM_USER0) + bio_offset(req->bio);
- memcpy(req_data, buf, req->data_len);
+ memcpy(req_data, buf, blk_rq_bytes(req));
kunmap_atomic(buf - bio_offset(req->bio), KM_USER0);
local_irq_enable();
switch (req_data[1]) {
case SMP_REPORT_GENERAL:
- req->data_len -= 8;
- resp_data_len -= 32;
+ req->resid_len -= 8;
+ rsp->resid_len -= 32;
resp_data[2] = SMP_RESP_FUNC_ACC;
resp_data[9] = sas_ha->num_phys;
break;
case SMP_REPORT_MANUF_INFO:
- req->data_len -= 8;
- resp_data_len -= 64;
+ req->resid_len -= 8;
+ rsp->resid_len -= 64;
resp_data[2] = SMP_RESP_FUNC_ACC;
memcpy(resp_data + 12, shost->hostt->name,
SAS_EXPANDER_VENDOR_ID_LEN);
break;
case SMP_DISCOVER:
- req->data_len -= 16;
- if ((int)req->data_len < 0) {
- req->data_len = 0;
+ req->resid_len -= 16;
+ if ((int)req->resid_len < 0) {
+ req->resid_len = 0;
error = -EINVAL;
goto out;
}
- resp_data_len -= 56;
+ rsp->resid_len -= 56;
sas_host_smp_discover(sas_ha, resp_data, req_data[9]);
break;
break;
case SMP_REPORT_PHY_SATA:
- req->data_len -= 16;
- if ((int)req->data_len < 0) {
- req->data_len = 0;
+ req->resid_len -= 16;
+ if ((int)req->resid_len < 0) {
+ req->resid_len = 0;
error = -EINVAL;
goto out;
}
- resp_data_len -= 60;
+ rsp->resid_len -= 60;
sas_report_phy_sata(sas_ha, resp_data, req_data[9]);
break;
break;
case SMP_PHY_CONTROL:
- req->data_len -= 44;
- if ((int)req->data_len < 0) {
- req->data_len = 0;
+ req->resid_len -= 44;
+ if ((int)req->resid_len < 0) {
+ req->resid_len = 0;
error = -EINVAL;
goto out;
}
- resp_data_len -= 8;
+ rsp->resid_len -= 8;
sas_phy_control(sas_ha, req_data[9], req_data[10],
req_data[32] >> 4, req_data[33] >> 4,
resp_data);
local_irq_disable();
buf = kmap_atomic(bio_page(rsp->bio), KM_USER0) + bio_offset(rsp->bio);
- memcpy(buf, resp_data, rsp->data_len);
+ memcpy(buf, resp_data, blk_rq_bytes(rsp));
flush_kernel_dcache_page(bio_page(rsp->bio));
kunmap_atomic(buf - bio_offset(rsp->bio), KM_USER0);
local_irq_enable();
- rsp->data_len = resp_data_len;
out:
kfree(req_data);
uint32_t bgstat = bgf->bgstat;
uint64_t failing_sector = 0;
- printk(KERN_ERR "BG ERROR in cmd 0x%x lba 0x%llx blk cnt 0x%lx "
+ printk(KERN_ERR "BG ERROR in cmd 0x%x lba 0x%llx blk cnt 0x%x "
"bgstat=0x%x bghm=0x%x\n",
cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd),
- cmd->request->nr_sectors, bgstat, bghm);
+ blk_rq_sectors(cmd->request), bgstat, bghm);
spin_lock(&_dump_buf_lock);
if (!_dump_buf_done) {
if (cmnd->cmnd[0] == READ_10)
lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
"9035 BLKGRD: READ @ sector %llu, "
- "count %lu\n",
- (unsigned long long)scsi_get_lba(cmnd),
- cmnd->request->nr_sectors);
+ "count %u\n",
+ (unsigned long long)scsi_get_lba(cmnd),
+ blk_rq_sectors(cmnd->request));
else if (cmnd->cmnd[0] == WRITE_10)
lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
"9036 BLKGRD: WRITE @ sector %llu, "
- "count %lu cmd=%p\n",
+ "count %u cmd=%p\n",
(unsigned long long)scsi_get_lba(cmnd),
- cmnd->request->nr_sectors,
+ blk_rq_sectors(cmnd->request),
cmnd);
err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
if (cmnd->cmnd[0] == READ_10)
lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
"9040 dbg: READ @ sector %llu, "
- "count %lu\n",
+ "count %u\n",
(unsigned long long)scsi_get_lba(cmnd),
- cmnd->request->nr_sectors);
+ blk_rq_sectors(cmnd->request));
else if (cmnd->cmnd[0] == WRITE_10)
lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
"9041 dbg: WRITE @ sector %llu, "
- "count %lu cmd=%p\n",
+ "count %u cmd=%p\n",
(unsigned long long)scsi_get_lba(cmnd),
- cmnd->request->nr_sectors, cmnd);
+ blk_rq_sectors(cmnd->request), cmnd);
else
lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
"9042 dbg: parser not implemented\n");
if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) {
printk(MPT2SAS_ERR_FMT "%s: multiple segments req %u %u, "
"rsp %u %u\n", ioc->name, __func__, req->bio->bi_vcnt,
- req->data_len, rsp->bio->bi_vcnt, rsp->data_len);
+ blk_rq_bytes(req), rsp->bio->bi_vcnt, blk_rq_bytes(rsp));
return -EINVAL;
}
*((u64 *)&mpi_request->SASAddress) = (rphy) ?
cpu_to_le64(rphy->identify.sas_address) :
cpu_to_le64(ioc->sas_hba.sas_address);
- mpi_request->RequestDataLength = cpu_to_le16(req->data_len - 4);
+ mpi_request->RequestDataLength = cpu_to_le16(blk_rq_bytes(req) - 4);
psge = &mpi_request->SGL;
/* WRITE sgel first */
MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_HOST_TO_IOC);
sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
dma_addr_out = pci_map_single(ioc->pdev, bio_data(req->bio),
- req->data_len, PCI_DMA_BIDIRECTIONAL);
+ blk_rq_bytes(req), PCI_DMA_BIDIRECTIONAL);
if (!dma_addr_out) {
mpt2sas_base_free_smid(ioc, le16_to_cpu(smid));
goto unmap;
}
- ioc->base_add_sg_single(psge, sgl_flags | (req->data_len - 4),
+ ioc->base_add_sg_single(psge, sgl_flags | (blk_rq_bytes(req) - 4),
dma_addr_out);
/* incr sgel */
MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
MPI2_SGE_FLAGS_END_OF_LIST);
sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
- dma_addr_in = pci_map_single(ioc->pdev, bio_data(rsp->bio),
- rsp->data_len, PCI_DMA_BIDIRECTIONAL);
+ dma_addr_in = pci_map_single(ioc->pdev, bio_data(rsp->bio),
+ blk_rq_bytes(rsp), PCI_DMA_BIDIRECTIONAL);
if (!dma_addr_in) {
mpt2sas_base_free_smid(ioc, le16_to_cpu(smid));
goto unmap;
}
- ioc->base_add_sg_single(psge, sgl_flags | (rsp->data_len + 4),
+ ioc->base_add_sg_single(psge, sgl_flags | (blk_rq_bytes(rsp) + 4),
dma_addr_in);
dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s - "
memcpy(req->sense, mpi_reply, sizeof(*mpi_reply));
req->sense_len = sizeof(*mpi_reply);
- req->data_len = 0;
- rsp->data_len -= mpi_reply->ResponseDataLength;
-
+ req->resid_len = 0;
+ rsp->resid_len -= mpi_reply->ResponseDataLength;
} else {
dtransportprintk(ioc, printk(MPT2SAS_DEBUG_FMT
"%s - no reply\n", ioc->name, __func__));
unmap:
if (dma_addr_out)
- pci_unmap_single(ioc->pdev, dma_addr_out, req->data_len,
+ pci_unmap_single(ioc->pdev, dma_addr_out, blk_rq_bytes(req),
PCI_DMA_BIDIRECTIONAL);
if (dma_addr_in)
- pci_unmap_single(ioc->pdev, dma_addr_in, rsp->data_len,
+ pci_unmap_single(ioc->pdev, dma_addr_in, blk_rq_bytes(rsp),
PCI_DMA_BIDIRECTIONAL);
out:
}
EXPORT_SYMBOL(osd_req_add_set_attr_list);
-static int _append_map_kern(struct request *req,
- void *buff, unsigned len, gfp_t flags)
-{
- struct bio *bio;
- int ret;
-
- bio = bio_map_kern(req->q, buff, len, flags);
- if (IS_ERR(bio)) {
- OSD_ERR("Failed bio_map_kern(%p, %d) => %ld\n", buff, len,
- PTR_ERR(bio));
- return PTR_ERR(bio);
- }
- ret = blk_rq_append_bio(req->q, req, bio);
- if (ret) {
- OSD_ERR("Failed blk_rq_append_bio(%p) => %d\n", bio, ret);
- bio_put(bio);
- }
- return ret;
-}
-
static int _req_append_segment(struct osd_request *or,
unsigned padding, struct _osd_req_data_segment *seg,
struct _osd_req_data_segment *last_seg, struct _osd_io_info *io)
else
pad_buff = io->pad_buff;
- ret = _append_map_kern(io->req, pad_buff, padding,
+ ret = blk_rq_map_kern(io->req->q, io->req, pad_buff, padding,
or->alloc_flags);
if (ret)
return ret;
io->total_bytes += padding;
}
- ret = _append_map_kern(io->req, seg->buff, seg->total_bytes,
+ ret = blk_rq_map_kern(io->req->q, io->req, seg->buff, seg->total_bytes,
or->alloc_flags);
if (ret)
return ret;
/*
* osd_finalize_request and helpers
*/
+static struct request *_make_request(struct request_queue *q, bool has_write,
+ struct _osd_io_info *oii, gfp_t flags)
+{
+ if (oii->bio)
+ return blk_make_request(q, oii->bio, flags);
+ else {
+ struct request *req;
+
+ req = blk_get_request(q, has_write ? WRITE : READ, flags);
+ if (unlikely(!req))
+ return ERR_PTR(-ENOMEM);
+
+ return req;
+ }
+}
static int _init_blk_request(struct osd_request *or,
bool has_in, bool has_out)
struct scsi_device *scsi_device = or->osd_dev->scsi_device;
struct request_queue *q = scsi_device->request_queue;
struct request *req;
- int ret = -ENOMEM;
+ int ret;
- req = blk_get_request(q, has_out, flags);
- if (!req)
+ req = _make_request(q, has_out, has_out ? &or->out : &or->in, flags);
+ if (IS_ERR(req)) {
+ ret = PTR_ERR(req);
goto out;
+ }
or->request = req;
req->cmd_type = REQ_TYPE_BLOCK_PC;
or->out.req = req;
if (has_in) {
/* allocate bidi request */
- req = blk_get_request(q, READ, flags);
- if (!req) {
+ req = _make_request(q, false, &or->in, flags);
+ if (IS_ERR(req)) {
OSD_DEBUG("blk_get_request for bidi failed\n");
+ ret = PTR_ERR(req);
goto out;
}
req->cmd_type = REQ_TYPE_BLOCK_PC;
return ret;
}
- if (or->out.bio) {
- ret = blk_rq_append_bio(or->request->q, or->out.req,
- or->out.bio);
- if (ret) {
- OSD_DEBUG("blk_rq_append_bio out failed\n");
- return ret;
- }
- OSD_DEBUG("out bytes=%llu (bytes_req=%u)\n",
- _LLU(or->out.total_bytes), or->out.req->data_len);
- }
- if (or->in.bio) {
- ret = blk_rq_append_bio(or->request->q, or->in.req, or->in.bio);
- if (ret) {
- OSD_DEBUG("blk_rq_append_bio in failed\n");
- return ret;
- }
- OSD_DEBUG("in bytes=%llu (bytes_req=%u)\n",
- _LLU(or->in.total_bytes), or->in.req->data_len);
- }
-
or->out.pad_buff = sg_out_pad_buffer;
or->in.pad_buff = sg_in_pad_buffer;
* is invalid. Prevent the garbage from being misinterpreted
* and prevent security leaks by zeroing out the excess data.
*/
- if (unlikely(req->data_len > 0 && req->data_len <= bufflen))
- memset(buffer + (bufflen - req->data_len), 0, req->data_len);
+ if (unlikely(req->resid_len > 0 && req->resid_len <= bufflen))
+ memset(buffer + (bufflen - req->resid_len), 0, req->resid_len);
if (resid)
- *resid = req->data_len;
+ *resid = req->resid_len;
ret = req->errors;
out:
blk_put_request(req);
* to queue the remainder of them.
*/
if (blk_end_request(req, error, bytes)) {
- int leftover = (req->hard_nr_sectors << 9);
-
- if (blk_pc_request(req))
- leftover = req->data_len;
-
/* kill remainder if no retrys */
if (error && scsi_noretry_cmd(cmd))
- blk_end_request(req, error, leftover);
+ blk_end_request_all(req, error);
else {
if (requeue) {
/*
}
EXPORT_SYMBOL(scsi_release_buffers);
-/*
- * Bidi commands Must be complete as a whole, both sides at once.
- * If part of the bytes were written and lld returned
- * scsi_in()->resid and/or scsi_out()->resid this information will be left
- * in req->data_len and req->next_rq->data_len. The upper-layer driver can
- * decide what to do with this information.
- */
-static void scsi_end_bidi_request(struct scsi_cmnd *cmd)
-{
- struct request *req = cmd->request;
- unsigned int dlen = req->data_len;
- unsigned int next_dlen = req->next_rq->data_len;
-
- req->data_len = scsi_out(cmd)->resid;
- req->next_rq->data_len = scsi_in(cmd)->resid;
-
- /* The req and req->next_rq have not been completed */
- BUG_ON(blk_end_bidi_request(req, 0, dlen, next_dlen));
-
- scsi_release_buffers(cmd);
-
- /*
- * This will goose the queue request function at the end, so we don't
- * need to worry about launching another command.
- */
- scsi_next_command(cmd);
-}
-
/*
* Function: scsi_io_completion()
*
void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
{
int result = cmd->result;
- int this_count;
struct request_queue *q = cmd->device->request_queue;
struct request *req = cmd->request;
int error = 0;
if (!sense_deferred)
error = -EIO;
}
+
+ req->resid_len = scsi_get_resid(cmd);
+
if (scsi_bidi_cmnd(cmd)) {
- /* will also release_buffers */
- scsi_end_bidi_request(cmd);
+ /*
+ * Bidi commands Must be complete as a whole,
+ * both sides at once.
+ */
+ req->next_rq->resid_len = scsi_in(cmd)->resid;
+
+ blk_end_request_all(req, 0);
+
+ scsi_release_buffers(cmd);
+ scsi_next_command(cmd);
return;
}
- req->data_len = scsi_get_resid(cmd);
}
BUG_ON(blk_bidi_rq(req)); /* bidi not support for !blk_pc_request yet */
* Next deal with any sectors which we were able to correctly
* handle.
*/
- SCSI_LOG_HLCOMPLETE(1, printk("%ld sectors total, "
+ SCSI_LOG_HLCOMPLETE(1, printk("%u sectors total, "
"%d bytes done.\n",
- req->nr_sectors, good_bytes));
+ blk_rq_sectors(req), good_bytes));
/*
* Recovered errors need reporting, but they're always treated
*/
if (scsi_end_request(cmd, error, good_bytes, result == 0) == NULL)
return;
- this_count = blk_rq_bytes(req);
error = -EIO;
if (driver_byte(result) & DRIVER_SENSE)
scsi_print_sense("", cmd);
}
- blk_end_request(req, -EIO, blk_rq_bytes(req));
+ blk_end_request_all(req, -EIO);
scsi_next_command(cmd);
break;
case ACTION_REPREP:
count = blk_rq_map_sg(req->q, req, sdb->table.sgl);
BUG_ON(count > sdb->table.nents);
sdb->table.nents = count;
- if (blk_pc_request(req))
- sdb->length = req->data_len;
- else
- sdb->length = req->nr_sectors << 9;
+ sdb->length = blk_rq_bytes(req);
return BLKPREP_OK;
}
if (unlikely(ret))
return ret;
} else {
- BUG_ON(req->data_len);
- BUG_ON(req->data);
+ BUG_ON(blk_rq_bytes(req));
memset(&cmd->sdb, 0, sizeof(cmd->sdb));
req->buffer = NULL;
}
cmd->cmd_len = req->cmd_len;
- if (!req->data_len)
+ if (!blk_rq_bytes(req))
cmd->sc_data_direction = DMA_NONE;
else if (rq_data_dir(req) == WRITE)
cmd->sc_data_direction = DMA_TO_DEVICE;
else
cmd->sc_data_direction = DMA_FROM_DEVICE;
- cmd->transfersize = req->data_len;
+ cmd->transfersize = blk_rq_bytes(req);
cmd->allowed = req->retries;
return BLKPREP_OK;
}
break;
case BLKPREP_DEFER:
/*
- * If we defer, the elv_next_request() returns NULL, but the
+ * If we defer, the blk_peek_request() returns NULL, but the
* queue must be restarted, so we plug here if no returning
* command will automatically do that.
*/
struct scsi_target *starget = scsi_target(sdev);
struct Scsi_Host *shost = sdev->host;
- blkdev_dequeue_request(req);
+ blk_start_request(req);
if (unlikely(cmd == NULL)) {
printk(KERN_CRIT "impossible request in %s.\n",
if (!sdev) {
printk("scsi: killing requests for dead queue\n");
- while ((req = elv_next_request(q)) != NULL)
+ while ((req = blk_peek_request(q)) != NULL)
scsi_kill_request(req, q);
return;
}
* that the request is fully prepared even if we cannot
* accept it.
*/
- req = elv_next_request(q);
+ req = blk_peek_request(q);
if (!req || !scsi_dev_queue_ready(q, sdev))
break;
* Remove the request from the request list.
*/
if (!(blk_queue_tagged(q) && !blk_queue_start_tag(q, req)))
- blkdev_dequeue_request(req);
+ blk_start_request(req);
sdev->device_busy++;
spin_unlock(q->queue_lock);
* we use REQ_TYPE_BLOCK_PC so scsi_init_io doesn't set the
* length for us.
*/
- cmd->sdb.length = rq->data_len;
+ cmd->sdb.length = blk_rq_bytes(rq);
return 0;
int (*handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
while (!blk_queue_plugged(q)) {
- req = elv_next_request(q);
+ req = blk_fetch_request(q);
if (!req)
break;
- blkdev_dequeue_request(req);
-
spin_unlock_irq(q->queue_lock);
handler = to_sas_internal(shost->transportt)->f->smp_handler;
struct scsi_device *sdp = q->queuedata;
struct gendisk *disk = rq->rq_disk;
struct scsi_disk *sdkp;
- sector_t block = rq->sector;
+ sector_t block = blk_rq_pos(rq);
sector_t threshold;
- unsigned int this_count = rq->nr_sectors;
+ unsigned int this_count = blk_rq_sectors(rq);
int ret, host_dif;
if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
this_count));
if (!sdp || !scsi_device_online(sdp) ||
- block + rq->nr_sectors > get_capacity(disk)) {
+ block + blk_rq_sectors(rq) > get_capacity(disk)) {
SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
- "Finishing %ld sectors\n",
- rq->nr_sectors));
+ "Finishing %u sectors\n",
+ blk_rq_sectors(rq)));
SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
"Retry with 0x%p\n", SCpnt));
goto out;
* for this.
*/
if (sdp->sector_size == 1024) {
- if ((block & 1) || (rq->nr_sectors & 1)) {
+ if ((block & 1) || (blk_rq_sectors(rq) & 1)) {
scmd_printk(KERN_ERR, SCpnt,
"Bad block number requested\n");
goto out;
}
}
if (sdp->sector_size == 2048) {
- if ((block & 3) || (rq->nr_sectors & 3)) {
+ if ((block & 3) || (blk_rq_sectors(rq) & 3)) {
scmd_printk(KERN_ERR, SCpnt,
"Bad block number requested\n");
goto out;
}
}
if (sdp->sector_size == 4096) {
- if ((block & 7) || (rq->nr_sectors & 7)) {
+ if ((block & 7) || (blk_rq_sectors(rq) & 7)) {
scmd_printk(KERN_ERR, SCpnt,
"Bad block number requested\n");
goto out;
}
SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt,
- "%s %d/%ld 512 byte blocks.\n",
+ "%s %d/%u 512 byte blocks.\n",
(rq_data_dir(rq) == WRITE) ?
"writing" : "reading", this_count,
- rq->nr_sectors));
+ blk_rq_sectors(rq)));
/* Set RDPROTECT/WRPROTECT if disk is formatted with DIF */
host_dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd)
{
- u64 start_lba = scmd->request->sector;
- u64 end_lba = scmd->request->sector + (scsi_bufflen(scmd) / 512);
+ u64 start_lba = blk_rq_pos(scmd->request);
+ u64 end_lba = blk_rq_pos(scmd->request) + (scsi_bufflen(scmd) / 512);
u64 bad_lba;
int info_valid;
sector_sz = scmd->device->sector_size;
sectors = good_bytes / sector_sz;
- phys = scmd->request->sector & 0xffffffff;
+ phys = blk_rq_pos(scmd->request) & 0xffffffff;
if (sector_sz == 4096)
phys >>= 3;
sense = rq->sense;
result = rq->errors;
- resid = rq->data_len;
+ resid = rq->resid_len;
SCSI_LOG_TIMEOUT(4, printk("sg_cmd_done: %s, pack_id=%d, res=0x%x\n",
sdp->disk->disk_name, srp->header.pack_id, result));
if (cd->device->sector_size == 2048)
error_sector <<= 2;
error_sector &= ~(block_sectors - 1);
- good_bytes = (error_sector - SCpnt->request->sector) << 9;
+ good_bytes = (error_sector -
+ blk_rq_pos(SCpnt->request)) << 9;
if (good_bytes < 0 || good_bytes >= this_count)
good_bytes = 0;
/*
cd->disk->disk_name, block));
if (!cd->device || !scsi_device_online(cd->device)) {
- SCSI_LOG_HLQUEUE(2, printk("Finishing %ld sectors\n",
- rq->nr_sectors));
+ SCSI_LOG_HLQUEUE(2, printk("Finishing %u sectors\n",
+ blk_rq_sectors(rq)));
SCSI_LOG_HLQUEUE(2, printk("Retry with 0x%p\n", SCpnt));
goto out;
}
/*
* request doesn't start on hw block boundary, add scatter pads
*/
- if (((unsigned int)rq->sector % (s_size >> 9)) ||
+ if (((unsigned int)blk_rq_pos(rq) % (s_size >> 9)) ||
(scsi_bufflen(SCpnt) % s_size)) {
scmd_printk(KERN_NOTICE, SCpnt, "unaligned transfer\n");
goto out;
this_count = (scsi_bufflen(SCpnt) >> 9) / (s_size >> 9);
- SCSI_LOG_HLQUEUE(2, printk("%s : %s %d/%ld 512 byte blocks.\n",
+ SCSI_LOG_HLQUEUE(2, printk("%s : %s %d/%u 512 byte blocks.\n",
cd->cdi.name,
(rq_data_dir(rq) == WRITE) ?
"writing" : "reading",
- this_count, rq->nr_sectors));
+ this_count, blk_rq_sectors(rq)));
SCpnt->cmnd[1] = 0;
- block = (unsigned int)rq->sector / (s_size >> 9);
+ block = (unsigned int)blk_rq_pos(rq) / (s_size >> 9);
if (this_count > 0xffff) {
this_count = 0xffff;
struct scsi_tape *STp = SRpnt->stp;
STp->buffer->cmdstat.midlevel_result = SRpnt->result = req->errors;
- STp->buffer->cmdstat.residual = req->data_len;
+ STp->buffer->cmdstat.residual = req->resid_len;
if (SRpnt->waiting)
complete(SRpnt->waiting);
if (linked_comm && SCpnt->device->queue_depth > 2
&& TLDEV(SCpnt->device->type)) {
HD(j)->cp_stat[i] = READY;
- flush_dev(SCpnt->device, SCpnt->request->sector, j, FALSE);
+ flush_dev(SCpnt->device, blk_rq_pos(SCpnt->request), j, FALSE);
return 0;
}
if (!(cpp->xdir == DTD_IN)) input_only = FALSE;
- if (SCpnt->request->sector < minsec) minsec = SCpnt->request->sector;
- if (SCpnt->request->sector > maxsec) maxsec = SCpnt->request->sector;
+ if (blk_rq_pos(SCpnt->request) < minsec)
+ minsec = blk_rq_pos(SCpnt->request);
+ if (blk_rq_pos(SCpnt->request) > maxsec)
+ maxsec = blk_rq_pos(SCpnt->request);
- sl[n] = SCpnt->request->sector;
- ioseek += SCpnt->request->nr_sectors;
+ sl[n] = blk_rq_pos(SCpnt->request);
+ ioseek += blk_rq_sectors(SCpnt->request);
if (!n) continue;
if (!input_only) for (n = 0; n < n_ready; n++) {
k = il[n]; cpp = &HD(j)->cp[k]; SCpnt = cpp->SCpnt;
- ll[n] = SCpnt->request->nr_sectors; pl[n] = SCpnt->serial_number;
+ ll[n] = blk_rq_sectors(SCpnt->request); pl[n] = SCpnt->serial_number;
if (!n) continue;
if (link_statistics && (overlap || !(flushcount % link_statistics)))
for (n = 0; n < n_ready; n++) {
k = il[n]; cpp = &HD(j)->cp[k]; SCpnt = cpp->SCpnt;
- printk("%s %d.%d:%d pid %ld mb %d fc %d nr %d sec %ld ns %ld"\
+ printk("%s %d.%d:%d pid %ld mb %d fc %d nr %d sec %ld ns %u"\
" cur %ld s:%c r:%c rev:%c in:%c ov:%c xd %d.\n",
(ihdlr ? "ihdlr" : "qcomm"), SCpnt->channel, SCpnt->target,
SCpnt->lun, SCpnt->serial_number, k, flushcount, n_ready,
- SCpnt->request->sector, SCpnt->request->nr_sectors, cursec,
- YESNO(s), YESNO(r), YESNO(rev), YESNO(input_only),
+ blk_rq_pos(SCpnt->request), blk_rq_sectors(SCpnt->request),
+ cursec, YESNO(s), YESNO(r), YESNO(rev), YESNO(input_only),
YESNO(overlap), cpp->xdir);
}
#endif
if (linked_comm && SCpnt->device->queue_depth > 2
&& TLDEV(SCpnt->device->type))
- flush_dev(SCpnt->device, SCpnt->request->sector, j, TRUE);
+ flush_dev(SCpnt->device, blk_rq_pos(SCpnt->request), j, TRUE);
tstatus = status_byte(spp->target_status);
char *addr = page_address(bvec->bv_page);
int len = bmd->iovecs[i].bv_len;
- if (read && !err)
+ if (read)
memcpy(p, addr, len);
__free_page(bvec->bv_page);
return block_read_full_page(page, blkdev_get_block);
}
+static int blkdev_readpages(struct file *file, struct address_space *mapping,
+ struct list_head *pages, unsigned nr_pages)
+{
+ return mpage_readpages(mapping, pages, nr_pages, blkdev_get_block);
+}
+
static int blkdev_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
static const struct address_space_operations def_blk_aops = {
.readpage = blkdev_readpage,
+ .readpages = blkdev_readpages,
.writepage = blkdev_writepage,
.sync_page = block_sync_page,
.write_begin = blkdev_write_begin,
struct pipe_inode_info *pipe, size_t count,
unsigned int flags)
{
+ ssize_t (*splice_read)(struct file *, loff_t *,
+ struct pipe_inode_info *, size_t, unsigned int);
struct coda_file_info *cfi;
struct file *host_file;
BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC);
host_file = cfi->cfi_container;
- if (!host_file->f_op || !host_file->f_op->splice_read)
- return -EINVAL;
+ splice_read = host_file->f_op->splice_read;
+ if (!splice_read)
+ splice_read = default_file_splice_read;
- return host_file->f_op->splice_read(host_file, ppos, pipe, count,flags);
+ return splice_read(host_file, ppos, pipe, count, flags);
}
static ssize_t
/* FIXME: should be include in osd_sense_info */
if (in_resid)
- *in_resid = or->in.req ? or->in.req->data_len : 0;
+ *in_resid = or->in.req ? or->in.req->resid_len : 0;
if (out_resid)
- *out_resid = or->out.req ? or->out.req->data_len : 0;
+ *out_resid = or->out.req ? or->out.req->resid_len : 0;
return ret;
}
return 0;
}
+/**
+ * generic_pipe_buf_release - put a reference to a &struct pipe_buffer
+ * @pipe: the pipe that the buffer belongs to
+ * @buf: the buffer to put a reference to
+ *
+ * Description:
+ * This function releases a reference to @buf.
+ */
+void generic_pipe_buf_release(struct pipe_inode_info *pipe,
+ struct pipe_buffer *buf)
+{
+ page_cache_release(buf->page);
+}
+
static const struct pipe_buf_operations anon_pipe_buf_ops = {
.can_merge = 1,
.map = generic_pipe_buf_map,
goto out;
if (!(in_file->f_mode & FMODE_READ))
goto fput_in;
- retval = -EINVAL;
- in_inode = in_file->f_path.dentry->d_inode;
- if (!in_inode)
- goto fput_in;
- if (!in_file->f_op || !in_file->f_op->splice_read)
- goto fput_in;
retval = -ESPIPE;
if (!ppos)
ppos = &in_file->f_pos;
retval = -EINVAL;
if (!out_file->f_op || !out_file->f_op->sendpage)
goto fput_out;
+ in_inode = in_file->f_path.dentry->d_inode;
out_inode = out_file->f_path.dentry->d_inode;
retval = rw_verify_area(WRITE, out_file, &out_file->f_pos, count);
if (retval < 0)
return ret;
}
-
EXPORT_SYMBOL(generic_file_splice_read);
+static const struct pipe_buf_operations default_pipe_buf_ops = {
+ .can_merge = 0,
+ .map = generic_pipe_buf_map,
+ .unmap = generic_pipe_buf_unmap,
+ .confirm = generic_pipe_buf_confirm,
+ .release = generic_pipe_buf_release,
+ .steal = generic_pipe_buf_steal,
+ .get = generic_pipe_buf_get,
+};
+
+static ssize_t kernel_readv(struct file *file, const struct iovec *vec,
+ unsigned long vlen, loff_t offset)
+{
+ mm_segment_t old_fs;
+ loff_t pos = offset;
+ ssize_t res;
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ /* The cast to a user pointer is valid due to the set_fs() */
+ res = vfs_readv(file, (const struct iovec __user *)vec, vlen, &pos);
+ set_fs(old_fs);
+
+ return res;
+}
+
+static ssize_t kernel_write(struct file *file, const char *buf, size_t count,
+ loff_t pos)
+{
+ mm_segment_t old_fs;
+ ssize_t res;
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ /* The cast to a user pointer is valid due to the set_fs() */
+ res = vfs_write(file, (const char __user *)buf, count, &pos);
+ set_fs(old_fs);
+
+ return res;
+}
+
+ssize_t default_file_splice_read(struct file *in, loff_t *ppos,
+ struct pipe_inode_info *pipe, size_t len,
+ unsigned int flags)
+{
+ unsigned int nr_pages;
+ unsigned int nr_freed;
+ size_t offset;
+ struct page *pages[PIPE_BUFFERS];
+ struct partial_page partial[PIPE_BUFFERS];
+ struct iovec vec[PIPE_BUFFERS];
+ pgoff_t index;
+ ssize_t res;
+ size_t this_len;
+ int error;
+ int i;
+ struct splice_pipe_desc spd = {
+ .pages = pages,
+ .partial = partial,
+ .flags = flags,
+ .ops = &default_pipe_buf_ops,
+ .spd_release = spd_release_page,
+ };
+
+ index = *ppos >> PAGE_CACHE_SHIFT;
+ offset = *ppos & ~PAGE_CACHE_MASK;
+ nr_pages = (len + offset + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+
+ for (i = 0; i < nr_pages && i < PIPE_BUFFERS && len; i++) {
+ struct page *page;
+
+ page = alloc_page(GFP_USER);
+ error = -ENOMEM;
+ if (!page)
+ goto err;
+
+ this_len = min_t(size_t, len, PAGE_CACHE_SIZE - offset);
+ vec[i].iov_base = (void __user *) page_address(page);
+ vec[i].iov_len = this_len;
+ pages[i] = page;
+ spd.nr_pages++;
+ len -= this_len;
+ offset = 0;
+ }
+
+ res = kernel_readv(in, vec, spd.nr_pages, *ppos);
+ if (res < 0) {
+ error = res;
+ goto err;
+ }
+
+ error = 0;
+ if (!res)
+ goto err;
+
+ nr_freed = 0;
+ for (i = 0; i < spd.nr_pages; i++) {
+ this_len = min_t(size_t, vec[i].iov_len, res);
+ partial[i].offset = 0;
+ partial[i].len = this_len;
+ if (!this_len) {
+ __free_page(pages[i]);
+ pages[i] = NULL;
+ nr_freed++;
+ }
+ res -= this_len;
+ }
+ spd.nr_pages -= nr_freed;
+
+ res = splice_to_pipe(pipe, &spd);
+ if (res > 0)
+ *ppos += res;
+
+ return res;
+
+err:
+ for (i = 0; i < spd.nr_pages; i++)
+ __free_page(pages[i]);
+
+ return error;
+}
+EXPORT_SYMBOL(default_file_splice_read);
+
/*
* Send 'sd->len' bytes to socket from 'sd->file' at position 'sd->pos'
* using sendpage(). Return the number of bytes sent.
EXPORT_SYMBOL(generic_file_splice_write);
+static int write_pipe_buf(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
+ struct splice_desc *sd)
+{
+ int ret;
+ void *data;
+
+ ret = buf->ops->confirm(pipe, buf);
+ if (ret)
+ return ret;
+
+ data = buf->ops->map(pipe, buf, 0);
+ ret = kernel_write(sd->u.file, data + buf->offset, sd->len, sd->pos);
+ buf->ops->unmap(pipe, buf, data);
+
+ return ret;
+}
+
+static ssize_t default_file_splice_write(struct pipe_inode_info *pipe,
+ struct file *out, loff_t *ppos,
+ size_t len, unsigned int flags)
+{
+ ssize_t ret;
+
+ ret = splice_from_pipe(pipe, out, ppos, len, flags, write_pipe_buf);
+ if (ret > 0)
+ *ppos += ret;
+
+ return ret;
+}
+
/**
* generic_splice_sendpage - splice data from a pipe to a socket
* @pipe: pipe to splice from
static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
loff_t *ppos, size_t len, unsigned int flags)
{
+ ssize_t (*splice_write)(struct pipe_inode_info *, struct file *,
+ loff_t *, size_t, unsigned int);
int ret;
- if (unlikely(!out->f_op || !out->f_op->splice_write))
- return -EINVAL;
-
if (unlikely(!(out->f_mode & FMODE_WRITE)))
return -EBADF;
if (unlikely(ret < 0))
return ret;
- return out->f_op->splice_write(pipe, out, ppos, len, flags);
+ splice_write = out->f_op->splice_write;
+ if (!splice_write)
+ splice_write = default_file_splice_write;
+
+ return splice_write(pipe, out, ppos, len, flags);
}
/*
struct pipe_inode_info *pipe, size_t len,
unsigned int flags)
{
+ ssize_t (*splice_read)(struct file *, loff_t *,
+ struct pipe_inode_info *, size_t, unsigned int);
int ret;
- if (unlikely(!in->f_op || !in->f_op->splice_read))
- return -EINVAL;
-
if (unlikely(!(in->f_mode & FMODE_READ)))
return -EBADF;
if (unlikely(ret < 0))
return ret;
- return in->f_op->splice_read(in, ppos, pipe, len, flags);
+ splice_read = in->f_op->splice_read;
+ if (!splice_read)
+ splice_read = default_file_splice_read;
+
+ return splice_read(in, ppos, pipe, len, flags);
}
/**
return ret;
}
+static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,
+ struct pipe_inode_info *opipe,
+ size_t len, unsigned int flags);
/*
* After the inode slimming patch, i_pipe/i_bdev/i_cdev share the same
* location, so checking ->i_pipe is not enough to verify that this is a
struct file *out, loff_t __user *off_out,
size_t len, unsigned int flags)
{
- struct pipe_inode_info *pipe;
+ struct pipe_inode_info *ipipe;
+ struct pipe_inode_info *opipe;
loff_t offset, *off;
long ret;
- pipe = pipe_info(in->f_path.dentry->d_inode);
- if (pipe) {
+ ipipe = pipe_info(in->f_path.dentry->d_inode);
+ opipe = pipe_info(out->f_path.dentry->d_inode);
+
+ if (ipipe && opipe) {
+ if (off_in || off_out)
+ return -ESPIPE;
+
+ if (!(in->f_mode & FMODE_READ))
+ return -EBADF;
+
+ if (!(out->f_mode & FMODE_WRITE))
+ return -EBADF;
+
+ /* Splicing to self would be fun, but... */
+ if (ipipe == opipe)
+ return -EINVAL;
+
+ return splice_pipe_to_pipe(ipipe, opipe, len, flags);
+ }
+
+ if (ipipe) {
if (off_in)
return -ESPIPE;
if (off_out) {
} else
off = &out->f_pos;
- ret = do_splice_from(pipe, out, off, len, flags);
+ ret = do_splice_from(ipipe, out, off, len, flags);
if (off_out && copy_to_user(off_out, off, sizeof(loff_t)))
ret = -EFAULT;
return ret;
}
- pipe = pipe_info(out->f_path.dentry->d_inode);
- if (pipe) {
+ if (opipe) {
if (off_out)
return -ESPIPE;
if (off_in) {
} else
off = &in->f_pos;
- ret = do_splice_to(in, off, pipe, len, flags);
+ ret = do_splice_to(in, off, opipe, len, flags);
if (off_in && copy_to_user(off_in, off, sizeof(loff_t)))
ret = -EFAULT;
* Make sure there's data to read. Wait for input if we can, otherwise
* return an appropriate error.
*/
-static int link_ipipe_prep(struct pipe_inode_info *pipe, unsigned int flags)
+static int ipipe_prep(struct pipe_inode_info *pipe, unsigned int flags)
{
int ret;
* Make sure there's writeable room. Wait for room if we can, otherwise
* return an appropriate error.
*/
-static int link_opipe_prep(struct pipe_inode_info *pipe, unsigned int flags)
+static int opipe_prep(struct pipe_inode_info *pipe, unsigned int flags)
{
int ret;
return ret;
}
+/*
+ * Splice contents of ipipe to opipe.
+ */
+static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,
+ struct pipe_inode_info *opipe,
+ size_t len, unsigned int flags)
+{
+ struct pipe_buffer *ibuf, *obuf;
+ int ret = 0, nbuf;
+ bool input_wakeup = false;
+
+
+retry:
+ ret = ipipe_prep(ipipe, flags);
+ if (ret)
+ return ret;
+
+ ret = opipe_prep(opipe, flags);
+ if (ret)
+ return ret;
+
+ /*
+ * Potential ABBA deadlock, work around it by ordering lock
+ * grabbing by pipe info address. Otherwise two different processes
+ * could deadlock (one doing tee from A -> B, the other from B -> A).
+ */
+ pipe_double_lock(ipipe, opipe);
+
+ do {
+ if (!opipe->readers) {
+ send_sig(SIGPIPE, current, 0);
+ if (!ret)
+ ret = -EPIPE;
+ break;
+ }
+
+ if (!ipipe->nrbufs && !ipipe->writers)
+ break;
+
+ /*
+ * Cannot make any progress, because either the input
+ * pipe is empty or the output pipe is full.
+ */
+ if (!ipipe->nrbufs || opipe->nrbufs >= PIPE_BUFFERS) {
+ /* Already processed some buffers, break */
+ if (ret)
+ break;
+
+ if (flags & SPLICE_F_NONBLOCK) {
+ ret = -EAGAIN;
+ break;
+ }
+
+ /*
+ * We raced with another reader/writer and haven't
+ * managed to process any buffers. A zero return
+ * value means EOF, so retry instead.
+ */
+ pipe_unlock(ipipe);
+ pipe_unlock(opipe);
+ goto retry;
+ }
+
+ ibuf = ipipe->bufs + ipipe->curbuf;
+ nbuf = (opipe->curbuf + opipe->nrbufs) % PIPE_BUFFERS;
+ obuf = opipe->bufs + nbuf;
+
+ if (len >= ibuf->len) {
+ /*
+ * Simply move the whole buffer from ipipe to opipe
+ */
+ *obuf = *ibuf;
+ ibuf->ops = NULL;
+ opipe->nrbufs++;
+ ipipe->curbuf = (ipipe->curbuf + 1) % PIPE_BUFFERS;
+ ipipe->nrbufs--;
+ input_wakeup = true;
+ } else {
+ /*
+ * Get a reference to this pipe buffer,
+ * so we can copy the contents over.
+ */
+ ibuf->ops->get(ipipe, ibuf);
+ *obuf = *ibuf;
+
+ /*
+ * Don't inherit the gift flag, we need to
+ * prevent multiple steals of this page.
+ */
+ obuf->flags &= ~PIPE_BUF_FLAG_GIFT;
+
+ obuf->len = len;
+ opipe->nrbufs++;
+ ibuf->offset += obuf->len;
+ ibuf->len -= obuf->len;
+ }
+ ret += obuf->len;
+ len -= obuf->len;
+ } while (len);
+
+ pipe_unlock(ipipe);
+ pipe_unlock(opipe);
+
+ /*
+ * If we put data in the output pipe, wakeup any potential readers.
+ */
+ if (ret > 0) {
+ smp_mb();
+ if (waitqueue_active(&opipe->wait))
+ wake_up_interruptible(&opipe->wait);
+ kill_fasync(&opipe->fasync_readers, SIGIO, POLL_IN);
+ }
+ if (input_wakeup)
+ wakeup_pipe_writers(ipipe);
+
+ return ret;
+}
+
/*
* Link contents of ipipe to opipe.
*/
* Keep going, unless we encounter an error. The ipipe/opipe
* ordering doesn't really matter.
*/
- ret = link_ipipe_prep(ipipe, flags);
+ ret = ipipe_prep(ipipe, flags);
if (!ret) {
- ret = link_opipe_prep(opipe, flags);
+ ret = opipe_prep(opipe, flags);
if (!ret)
ret = link_pipe(ipipe, opipe, len, flags);
}
#define bio_sectors(bio) ((bio)->bi_size >> 9)
#define bio_empty_barrier(bio) (bio_barrier(bio) && !bio_has_data(bio) && !bio_discard(bio))
-static inline unsigned int bio_cur_sectors(struct bio *bio)
+static inline unsigned int bio_cur_bytes(struct bio *bio)
{
if (bio->bi_vcnt)
- return bio_iovec(bio)->bv_len >> 9;
+ return bio_iovec(bio)->bv_len;
else /* dataless requests such as discard */
- return bio->bi_size >> 9;
+ return bio->bi_size;
}
static inline void *bio_data(struct bio *bio)
}
/*
- * BIO list managment for use by remapping drivers (e.g. DM or MD).
+ * BIO list management for use by remapping drivers (e.g. DM or MD) and loop.
*
* A bio_list anchors a singly-linked list of bios chained through the bi_next
* member of the bio. The bio_list also caches the last list member to allow
enum rq_cmd_type_bits cmd_type;
unsigned long atomic_flags;
- /* Maintain bio traversal state for part by part I/O submission.
- * hard_* are block layer internals, no driver should touch them!
- */
-
- sector_t sector; /* next sector to submit */
- sector_t hard_sector; /* next sector to complete */
- unsigned long nr_sectors; /* no. of sectors left to submit */
- unsigned long hard_nr_sectors; /* no. of sectors left to complete */
- /* no. of sectors left to submit in the current segment */
- unsigned int current_nr_sectors;
-
- /* no. of sectors left to complete in the current segment */
- unsigned int hard_cur_sectors;
+ /* the following two fields are internal, NEVER access directly */
+ sector_t __sector; /* sector cursor */
+ unsigned int __data_len; /* total data len */
struct bio *bio;
struct bio *biotail;
unsigned short ioprio;
- void *special;
- char *buffer;
+ void *special; /* opaque pointer available for LLD use */
+ char *buffer; /* kaddr of the current segment if available */
int tag;
int errors;
unsigned char __cmd[BLK_MAX_CDB];
unsigned char *cmd;
- unsigned int data_len;
unsigned int extra_len; /* length of alignment and padding */
unsigned int sense_len;
- void *data;
+ unsigned int resid_len; /* residual count */
void *sense;
unsigned long deadline;
struct list_head tag_busy_list;
unsigned int nr_sorted;
- unsigned int in_flight;
+ unsigned int in_flight[2];
unsigned int rq_timeout;
struct timer_list timeout;
__clear_bit(flag, &q->queue_flags);
}
+static inline int queue_in_flight(struct request_queue *q)
+{
+ return q->in_flight[0] + q->in_flight[1];
+}
+
static inline void queue_flag_clear(unsigned int flag, struct request_queue *q)
{
WARN_ON_ONCE(!queue_is_locked(q));
extern void blk_put_request(struct request *);
extern void __blk_put_request(struct request_queue *, struct request *);
extern struct request *blk_get_request(struct request_queue *, int, gfp_t);
+extern struct request *blk_make_request(struct request_queue *, struct bio *,
+ gfp_t);
extern void blk_insert_request(struct request_queue *, struct request *, int, void *);
extern void blk_requeue_request(struct request_queue *, struct request *);
extern int blk_rq_check_limits(struct request_queue *q, struct request *rq);
extern int sg_scsi_ioctl(struct request_queue *, struct gendisk *, fmode_t,
struct scsi_ioctl_command __user *);
-/*
- * Temporary export, until SCSI gets fixed up.
- */
-extern int blk_rq_append_bio(struct request_queue *q, struct request *rq,
- struct bio *bio);
-
/*
* A queue has just exitted congestion. Note this in the global counter of
* congested queues, and wake up anyone who was waiting for requests to be
extern void __blk_stop_queue(struct request_queue *q);
extern void __blk_run_queue(struct request_queue *);
extern void blk_run_queue(struct request_queue *);
-extern void blk_start_queueing(struct request_queue *);
extern int blk_rq_map_user(struct request_queue *, struct request *,
struct rq_map_data *, void __user *, unsigned long,
gfp_t);
blk_run_backing_dev(mapping->backing_dev_info, NULL);
}
-extern void blkdev_dequeue_request(struct request *req);
+/*
+ * blk_rq_pos() : the current sector
+ * blk_rq_bytes() : bytes left in the entire request
+ * blk_rq_cur_bytes() : bytes left in the current segment
+ * blk_rq_sectors() : sectors left in the entire request
+ * blk_rq_cur_sectors() : sectors left in the current segment
+ */
+static inline sector_t blk_rq_pos(const struct request *rq)
+{
+ return rq->__sector;
+}
+
+static inline unsigned int blk_rq_bytes(const struct request *rq)
+{
+ return rq->__data_len;
+}
+
+static inline int blk_rq_cur_bytes(const struct request *rq)
+{
+ return rq->bio ? bio_cur_bytes(rq->bio) : 0;
+}
+
+static inline unsigned int blk_rq_sectors(const struct request *rq)
+{
+ return blk_rq_bytes(rq) >> 9;
+}
+
+static inline unsigned int blk_rq_cur_sectors(const struct request *rq)
+{
+ return blk_rq_cur_bytes(rq) >> 9;
+}
+
+/*
+ * Request issue related functions.
+ */
+extern struct request *blk_peek_request(struct request_queue *q);
+extern void blk_start_request(struct request *rq);
+extern struct request *blk_fetch_request(struct request_queue *q);
/*
- * blk_end_request() and friends.
- * __blk_end_request() and end_request() must be called with
- * the request queue spinlock acquired.
+ * Request completion related functions.
+ *
+ * blk_update_request() completes given number of bytes and updates
+ * the request without completing it.
+ *
+ * blk_end_request() and friends. __blk_end_request() must be called
+ * with the request queue spinlock acquired.
*
* Several drivers define their own end_request and call
* blk_end_request() for parts of the original function.
* This prevents code duplication in drivers.
*/
-extern int blk_end_request(struct request *rq, int error,
- unsigned int nr_bytes);
-extern int __blk_end_request(struct request *rq, int error,
- unsigned int nr_bytes);
-extern int blk_end_bidi_request(struct request *rq, int error,
- unsigned int nr_bytes, unsigned int bidi_bytes);
-extern void end_request(struct request *, int);
-extern int blk_end_request_callback(struct request *rq, int error,
- unsigned int nr_bytes,
- int (drv_callback)(struct request *));
+extern bool blk_update_request(struct request *rq, int error,
+ unsigned int nr_bytes);
+extern bool blk_end_request(struct request *rq, int error,
+ unsigned int nr_bytes);
+extern void blk_end_request_all(struct request *rq, int error);
+extern bool blk_end_request_cur(struct request *rq, int error);
+extern bool __blk_end_request(struct request *rq, int error,
+ unsigned int nr_bytes);
+extern void __blk_end_request_all(struct request *rq, int error);
+extern bool __blk_end_request_cur(struct request *rq, int error);
+
extern void blk_complete_request(struct request *);
extern void __blk_complete_request(struct request *);
extern void blk_abort_request(struct request *);
extern void blk_abort_queue(struct request_queue *);
-extern void blk_update_request(struct request *rq, int error,
- unsigned int nr_bytes);
-
-/*
- * blk_end_request() takes bytes instead of sectors as a complete size.
- * blk_rq_bytes() returns bytes left to complete in the entire request.
- * blk_rq_cur_bytes() returns bytes left to complete in the current segment.
- */
-extern unsigned int blk_rq_bytes(struct request *rq);
-extern unsigned int blk_rq_cur_bytes(struct request *rq);
/*
* Access functions for manipulating queue properties
extern void elv_merge_requests(struct request_queue *, struct request *,
struct request *);
extern void elv_merged_request(struct request_queue *, struct request *, int);
-extern void elv_dequeue_request(struct request_queue *, struct request *);
extern void elv_requeue_request(struct request_queue *, struct request *);
extern int elv_queue_empty(struct request_queue *);
-extern struct request *elv_next_request(struct request_queue *q);
extern struct request *elv_former_request(struct request_queue *, struct request *);
extern struct request *elv_latter_request(struct request_queue *, struct request *);
extern int elv_register_queue(struct request_queue *q);
ELV_MQUEUE_MUST,
};
-#define rq_end_sector(rq) ((rq)->sector + (rq)->nr_sectors)
+#define rq_end_sector(rq) (blk_rq_pos(rq) + blk_rq_sectors(rq))
#define rb_entry_rq(node) rb_entry((node), struct request, rb_node)
/*
/* fs/splice.c */
extern ssize_t generic_file_splice_read(struct file *, loff_t *,
struct pipe_inode_info *, size_t, unsigned int);
+extern ssize_t default_file_splice_read(struct file *, loff_t *,
+ struct pipe_inode_info *, size_t, unsigned int);
extern ssize_t generic_file_splice_write(struct pipe_inode_info *,
struct file *, loff_t *, size_t, unsigned int);
extern ssize_t generic_splice_sendpage(struct pipe_inode_info *pipe,
#include <asm/io.h>
#include <asm/mutex.h>
+/* for request_sense */
+#include <linux/cdrom.h>
+
#if defined(CONFIG_CRIS) || defined(CONFIG_FRV) || defined(CONFIG_MN10300)
# define SUPPORT_VLB_SYNC 0
#else
unsigned int cursg_ofs;
struct request *rq; /* copy of request */
- void *special; /* valid_t generally */
};
/* ATAPI packet command flags */
/* data buffer */
u8 *buf;
- /* current buffer position */
- u8 *cur_pos;
int buf_size;
- /* missing/available data on the current buffer */
- int b_count;
/* the corresponding request */
struct request *rq;
*/
u8 pc_buf[IDE_PC_BUFFER_SIZE];
- /* idetape only */
- struct idetape_bh *bh;
- char *b_data;
-
unsigned long timeout;
};
/* callback for packet commands */
int (*pc_callback)(struct ide_drive_s *, int);
- void (*pc_update_buffers)(struct ide_drive_s *, struct ide_atapi_pc *);
- int (*pc_io_buffers)(struct ide_drive_s *, struct ide_atapi_pc *,
- unsigned int, int);
-
ide_startstop_t (*irq_handler)(struct ide_drive_s *);
unsigned long atapi_flags;
struct ide_atapi_pc request_sense_pc;
- struct request request_sense_rq;
+
+ /* current sense rq and buffer */
+ bool sense_rq_armed;
+ struct request sense_rq;
+ struct request_sense sense_data;
};
typedef struct ide_drive_s ide_drive_t;
int ide_do_start_stop(ide_drive_t *, struct gendisk *, int);
int ide_set_media_lock(ide_drive_t *, struct gendisk *, int);
void ide_create_request_sense_cmd(ide_drive_t *, struct ide_atapi_pc *);
-void ide_retry_pc(ide_drive_t *, struct gendisk *);
+void ide_retry_pc(ide_drive_t *drive);
+
+void ide_prep_sense(ide_drive_t *drive, struct request *rq);
+int ide_queue_sense_rq(ide_drive_t *drive, void *special);
int ide_cd_expiry(ide_drive_t *);
gfp_t old_gfp_mask;
spinlock_t lo_lock;
- struct bio *lo_bio;
- struct bio *lo_biotail;
+ struct bio_list lo_bio_list;
int lo_state;
struct mutex lo_ctl_mutex;
struct task_struct *lo_thread;
+++ /dev/null
-/*
- * include/linux/mg_disk.c
- *
- * Support for the mGine m[g]flash IO mode.
- * Based on legacy hd.c
- *
- * (c) 2008 mGine Co.,LTD
- * (c) 2008 unsik Kim <donari75@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef __MG_DISK_H__
-#define __MG_DISK_H__
-
-#include <linux/blkdev.h>
-#include <linux/ata.h>
-
-/* name for block device */
-#define MG_DISK_NAME "mgd"
-/* name for platform device */
-#define MG_DEV_NAME "mg_disk"
-
-#define MG_DISK_MAJ 0
-#define MG_DISK_MAX_PART 16
-#define MG_SECTOR_SIZE 512
-#define MG_MAX_SECTS 256
-
-/* Register offsets */
-#define MG_BUFF_OFFSET 0x8000
-#define MG_STORAGE_BUFFER_SIZE 0x200
-#define MG_REG_OFFSET 0xC000
-#define MG_REG_FEATURE (MG_REG_OFFSET + 2) /* write case */
-#define MG_REG_ERROR (MG_REG_OFFSET + 2) /* read case */
-#define MG_REG_SECT_CNT (MG_REG_OFFSET + 4)
-#define MG_REG_SECT_NUM (MG_REG_OFFSET + 6)
-#define MG_REG_CYL_LOW (MG_REG_OFFSET + 8)
-#define MG_REG_CYL_HIGH (MG_REG_OFFSET + 0xA)
-#define MG_REG_DRV_HEAD (MG_REG_OFFSET + 0xC)
-#define MG_REG_COMMAND (MG_REG_OFFSET + 0xE) /* write case */
-#define MG_REG_STATUS (MG_REG_OFFSET + 0xE) /* read case */
-#define MG_REG_DRV_CTRL (MG_REG_OFFSET + 0x10)
-#define MG_REG_BURST_CTRL (MG_REG_OFFSET + 0x12)
-
-/* "Drive Select/Head Register" bit values */
-#define MG_REG_HEAD_MUST_BE_ON 0xA0 /* These 2 bits are always on */
-#define MG_REG_HEAD_DRIVE_MASTER (0x00 | MG_REG_HEAD_MUST_BE_ON)
-#define MG_REG_HEAD_DRIVE_SLAVE (0x10 | MG_REG_HEAD_MUST_BE_ON)
-#define MG_REG_HEAD_LBA_MODE (0x40 | MG_REG_HEAD_MUST_BE_ON)
-
-
-/* "Device Control Register" bit values */
-#define MG_REG_CTRL_INTR_ENABLE 0x0
-#define MG_REG_CTRL_INTR_DISABLE (0x1<<1)
-#define MG_REG_CTRL_RESET (0x1<<2)
-#define MG_REG_CTRL_INTR_POLA_ACTIVE_HIGH 0x0
-#define MG_REG_CTRL_INTR_POLA_ACTIVE_LOW (0x1<<4)
-#define MG_REG_CTRL_DPD_POLA_ACTIVE_LOW 0x0
-#define MG_REG_CTRL_DPD_POLA_ACTIVE_HIGH (0x1<<5)
-#define MG_REG_CTRL_DPD_DISABLE 0x0
-#define MG_REG_CTRL_DPD_ENABLE (0x1<<6)
-
-/* Status register bit */
-/* error bit in status register */
-#define MG_REG_STATUS_BIT_ERROR 0x01
-/* corrected error in status register */
-#define MG_REG_STATUS_BIT_CORRECTED_ERROR 0x04
-/* data request bit in status register */
-#define MG_REG_STATUS_BIT_DATA_REQ 0x08
-/* DSC - Drive Seek Complete */
-#define MG_REG_STATUS_BIT_SEEK_DONE 0x10
-/* DWF - Drive Write Fault */
-#define MG_REG_STATUS_BIT_WRITE_FAULT 0x20
-#define MG_REG_STATUS_BIT_READY 0x40
-#define MG_REG_STATUS_BIT_BUSY 0x80
-
-/* handy status */
-#define MG_STAT_READY (MG_REG_STATUS_BIT_READY | MG_REG_STATUS_BIT_SEEK_DONE)
-#define MG_READY_OK(s) (((s) & (MG_STAT_READY | \
- (MG_REG_STATUS_BIT_BUSY | \
- MG_REG_STATUS_BIT_WRITE_FAULT | \
- MG_REG_STATUS_BIT_ERROR))) == MG_STAT_READY)
-
-/* Error register */
-#define MG_REG_ERR_AMNF 0x01
-#define MG_REG_ERR_ABRT 0x04
-#define MG_REG_ERR_IDNF 0x10
-#define MG_REG_ERR_UNC 0x40
-#define MG_REG_ERR_BBK 0x80
-
-/* error code for others */
-#define MG_ERR_NONE 0
-#define MG_ERR_TIMEOUT 0x100
-#define MG_ERR_INIT_STAT 0x101
-#define MG_ERR_TRANSLATION 0x102
-#define MG_ERR_CTRL_RST 0x103
-#define MG_ERR_INV_STAT 0x104
-#define MG_ERR_RSTOUT 0x105
-
-#define MG_MAX_ERRORS 6 /* Max read/write errors */
-
-/* command */
-#define MG_CMD_RD 0x20
-#define MG_CMD_WR 0x30
-#define MG_CMD_SLEEP 0x99
-#define MG_CMD_WAKEUP 0xC3
-#define MG_CMD_ID 0xEC
-#define MG_CMD_WR_CONF 0x3C
-#define MG_CMD_RD_CONF 0x40
-
-/* operation mode */
-#define MG_OP_CASCADE (1 << 0)
-#define MG_OP_CASCADE_SYNC_RD (1 << 1)
-#define MG_OP_CASCADE_SYNC_WR (1 << 2)
-#define MG_OP_INTERLEAVE (1 << 3)
-
-/* synchronous */
-#define MG_BURST_LAT_4 (3 << 4)
-#define MG_BURST_LAT_5 (4 << 4)
-#define MG_BURST_LAT_6 (5 << 4)
-#define MG_BURST_LAT_7 (6 << 4)
-#define MG_BURST_LAT_8 (7 << 4)
-#define MG_BURST_LEN_4 (1 << 1)
-#define MG_BURST_LEN_8 (2 << 1)
-#define MG_BURST_LEN_16 (3 << 1)
-#define MG_BURST_LEN_32 (4 << 1)
-#define MG_BURST_LEN_CONT (0 << 1)
-
-/* timeout value (unit: ms) */
-#define MG_TMAX_CONF_TO_CMD 1
-#define MG_TMAX_WAIT_RD_DRQ 10
-#define MG_TMAX_WAIT_WR_DRQ 500
-#define MG_TMAX_RST_TO_BUSY 10
-#define MG_TMAX_HDRST_TO_RDY 500
-#define MG_TMAX_SWRST_TO_RDY 500
-#define MG_TMAX_RSTOUT 3000
-
-/* device attribution */
-/* use mflash as boot device */
-#define MG_BOOT_DEV (1 << 0)
-/* use mflash as storage device */
-#define MG_STORAGE_DEV (1 << 1)
-/* same as MG_STORAGE_DEV, but bootloader already done reset sequence */
-#define MG_STORAGE_DEV_SKIP_RST (1 << 2)
-
-#define MG_DEV_MASK (MG_BOOT_DEV | MG_STORAGE_DEV | MG_STORAGE_DEV_SKIP_RST)
-
-/* names of GPIO resource */
-#define MG_RST_PIN "mg_rst"
-/* except MG_BOOT_DEV, reset-out pin should be assigned */
-#define MG_RSTOUT_PIN "mg_rstout"
-
-/* private driver data */
-struct mg_drv_data {
- /* disk resource */
- u32 use_polling;
-
- /* device attribution */
- u32 dev_attr;
-
- /* internally used */
- struct mg_host *host;
-};
-
-/* main structure for mflash driver */
-struct mg_host {
- struct device *dev;
-
- struct request_queue *breq;
- spinlock_t lock;
- struct gendisk *gd;
-
- struct timer_list timer;
- void (*mg_do_intr) (struct mg_host *);
-
- u16 id[ATA_ID_WORDS];
-
- u16 cyls;
- u16 heads;
- u16 sectors;
- u32 n_sectors;
- u32 nres_sectors;
-
- void __iomem *dev_base;
- unsigned int irq;
- unsigned int rst;
- unsigned int rstout;
-
- u32 major;
- u32 error;
-};
-
-/*
- * Debugging macro and defines
- */
-#undef DO_MG_DEBUG
-#ifdef DO_MG_DEBUG
-# define MG_DBG(fmt, args...) \
- printk(KERN_DEBUG "%s:%d "fmt, __func__, __LINE__, ##args)
-#else /* CONFIG_MG_DEBUG */
-# define MG_DBG(fmt, args...) do { } while (0)
-#endif /* CONFIG_MG_DEBUG */
-
-#endif
void generic_pipe_buf_get(struct pipe_inode_info *, struct pipe_buffer *);
int generic_pipe_buf_confirm(struct pipe_inode_info *, struct pipe_buffer *);
int generic_pipe_buf_steal(struct pipe_inode_info *, struct pipe_buffer *);
+void generic_pipe_buf_release(struct pipe_inode_info *, struct pipe_buffer *);
#endif
#include <linux/pipe_fs_i.h>
/*
- * splice is tied to pipes as a transport (at least for now), so we'll just
- * add the splice flags here.
+ * Flags passed in from splice/tee/vmsplice
*/
#define SPLICE_F_MOVE (0x01) /* move pages instead of copying */
#define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */
#define VIRTIO_BLK_F_GEOMETRY 4 /* Legacy geometry available */
#define VIRTIO_BLK_F_RO 5 /* Disk is read-only */
#define VIRTIO_BLK_F_BLK_SIZE 6 /* Block size of disk is available*/
+#define VIRTIO_BLK_F_SCSI 7 /* Supports scsi command passthru */
struct virtio_blk_config
{
__u64 sector;
};
+struct virtio_scsi_inhdr {
+ __u32 errors;
+ __u32 data_len;
+ __u32 sense_len;
+ __u32 residual;
+};
+
/* And this is the final byte of the write scatter-gather list. */
#define VIRTIO_BLK_S_OK 0
#define VIRTIO_BLK_S_IOERR 1
static inline sector_t scsi_get_lba(struct scsi_cmnd *scmd)
{
- return scmd->request->sector;
+ return blk_rq_pos(scmd->request);
}
static inline unsigned scsi_prot_sg_count(struct scsi_cmnd *cmd)
if (blk_pc_request(rq)) {
what |= BLK_TC_ACT(BLK_TC_PC);
- __blk_add_trace(bt, 0, rq->data_len, rw, what, rq->errors,
- rq->cmd_len, rq->cmd);
+ __blk_add_trace(bt, 0, blk_rq_bytes(rq), rw,
+ what, rq->errors, rq->cmd_len, rq->cmd);
} else {
what |= BLK_TC_ACT(BLK_TC_FS);
- __blk_add_trace(bt, rq->hard_sector, rq->hard_nr_sectors << 9,
- rw, what, rq->errors, 0, NULL);
+ __blk_add_trace(bt, blk_rq_pos(rq), blk_rq_bytes(rq), rw,
+ what, rq->errors, 0, NULL);
}
}
return;
if (blk_pc_request(rq))
- __blk_add_trace(bt, 0, rq->data_len, 0, BLK_TA_DRV_DATA,
- rq->errors, len, data);
+ __blk_add_trace(bt, 0, blk_rq_bytes(rq), 0,
+ BLK_TA_DRV_DATA, rq->errors, len, data);
else
- __blk_add_trace(bt, rq->hard_sector, rq->hard_nr_sectors << 9,
- 0, BLK_TA_DRV_DATA, rq->errors, len, data);
+ __blk_add_trace(bt, blk_rq_pos(rq), blk_rq_bytes(rq), 0,
+ BLK_TA_DRV_DATA, rq->errors, len, data);
}
EXPORT_SYMBOL_GPL(blk_add_driver_data);
projects / ~andy / linux / commitdiff