u32 timo_slot;
-
struct work_struct completion_worker;
-
- struct bio_list bio_queue;
- int queue_stopped;
-
- struct list_head flush_list;
};
#define SKD_FLUSH_JOB "skd-flush-jobs"
module_param(skd_isr_comp_limit, int, 0444);
MODULE_PARM_DESC(skd_isr_comp_limit, "s1120 isr comp limit (0=none) default=4");
-static int skd_bio;
-module_param(skd_bio, int, 0444);
-MODULE_PARM_DESC(skd_bio,
- "Register as a bio device instead of block (0, 1) default=0");
-
/* Major device number dynamically assigned. */
static u32 skd_major;
static void skd_log_skreq(struct skd_device *skdev,
struct skd_request_context *skreq, const char *event);
-/* FLUSH FUA flag handling. */
-static int skd_flush_cmd_enqueue(struct skd_device *, void *);
-static void *skd_flush_cmd_dequeue(struct skd_device *);
-
-
/*
*****************************************************************************
* READ/WRITE REQUESTS
*/
static void skd_stop_queue(struct skd_device *skdev)
{
- if (!skd_bio)
- blk_stop_queue(skdev->queue);
- else
- skdev->queue_stopped = 1;
+ blk_stop_queue(skdev->queue);
}
static void skd_unstop_queue(struct skd_device *skdev)
{
- if (!skd_bio)
- queue_flag_clear(QUEUE_FLAG_STOPPED, skdev->queue);
- else
- skdev->queue_stopped = 0;
+ queue_flag_clear(QUEUE_FLAG_STOPPED, skdev->queue);
}
static void skd_start_queue(struct skd_device *skdev)
{
- if (!skd_bio) {
- blk_start_queue(skdev->queue);
- } else {
- pr_err("(%s): Starting queue\n", skd_name(skdev));
- skdev->queue_stopped = 0;
- skd_request_fn(skdev->queue);
- }
+ blk_start_queue(skdev->queue);
}
static int skd_queue_stopped(struct skd_device *skdev)
{
- if (!skd_bio)
- return blk_queue_stopped(skdev->queue);
- else
- return skdev->queue_stopped;
+ return blk_queue_stopped(skdev->queue);
}
-static void skd_fail_all_pending_blk(struct skd_device *skdev)
+static void skd_fail_all_pending(struct skd_device *skdev)
{
struct request_queue *q = skdev->queue;
struct request *req;
}
}
-static void skd_fail_all_pending_bio(struct skd_device *skdev)
-{
- struct bio *bio;
- int error = -EIO;
-
- for (;; ) {
- bio = bio_list_pop(&skdev->bio_queue);
-
- if (bio == NULL)
- break;
-
- bio_endio(bio, error);
- }
-}
-
-static void skd_fail_all_pending(struct skd_device *skdev)
-{
- if (!skd_bio)
- skd_fail_all_pending_blk(skdev);
- else
- skd_fail_all_pending_bio(skdev);
-}
-
-static void skd_make_request(struct request_queue *q, struct bio *bio)
-{
- struct skd_device *skdev = q->queuedata;
- unsigned long flags;
-
- spin_lock_irqsave(&skdev->lock, flags);
-
- bio_list_add(&skdev->bio_queue, bio);
- skd_request_fn(skdev->queue);
-
- spin_unlock_irqrestore(&skdev->lock, flags);
-}
-
static void
skd_prep_rw_cdb(struct skd_scsi_request *scsi_req,
int data_dir, unsigned lba,
put_unaligned_be64(lba, &buf[8]);
put_unaligned_be32(count, &buf[16]);
- if (!skd_bio) {
- req = skreq->req;
- blk_add_request_payload(req, page, len);
- req->buffer = buf;
- } else {
- skreq->bio->bi_io_vec->bv_page = page;
- skreq->bio->bi_io_vec->bv_offset = 0;
- skreq->bio->bi_io_vec->bv_len = len;
-
- skreq->bio->bi_vcnt = 1;
- skreq->bio->bi_phys_segments = 1;
- }
+ req = skreq->req;
+ blk_add_request_payload(req, page, len);
+ req->buffer = buf;
}
static void skd_request_fn_not_online(struct request_queue *q);
struct fit_msg_hdr *fmh = NULL;
struct skd_request_context *skreq;
struct request *req = NULL;
- struct bio *bio = NULL;
struct skd_scsi_request *scsi_req;
struct page *page;
unsigned long io_flags;
flush = fua = 0;
- if (!skd_bio) {
- req = blk_peek_request(q);
-
- /* Are there any native requests to start? */
- if (req == NULL)
- break;
-
- lba = (u32)blk_rq_pos(req);
- count = blk_rq_sectors(req);
- data_dir = rq_data_dir(req);
- io_flags = req->cmd_flags;
-
- if (io_flags & REQ_FLUSH)
- flush++;
-
- if (io_flags & REQ_FUA)
- fua++;
+ req = blk_peek_request(q);
- pr_debug("%s:%s:%d new req=%p lba=%u(0x%x) "
- "count=%u(0x%x) dir=%d\n",
- skdev->name, __func__, __LINE__,
- req, lba, lba, count, count, data_dir);
- } else {
- if (!list_empty(&skdev->flush_list)) {
- /* Process data part of FLUSH request. */
- bio = (struct bio *)skd_flush_cmd_dequeue(skdev);
- flush++;
- pr_debug("%s:%s:%d processing FLUSH request with data.\n",
- skdev->name, __func__, __LINE__);
- } else {
- /* peek at our bio queue */
- bio = bio_list_peek(&skdev->bio_queue);
- }
+ /* Are there any native requests to start? */
+ if (req == NULL)
+ break;
- /* Are there any native requests to start? */
- if (bio == NULL)
- break;
+ lba = (u32)blk_rq_pos(req);
+ count = blk_rq_sectors(req);
+ data_dir = rq_data_dir(req);
+ io_flags = req->cmd_flags;
- lba = (u32)bio->bi_sector;
- count = bio_sectors(bio);
- data_dir = bio_data_dir(bio);
- io_flags = bio->bi_rw;
+ if (io_flags & REQ_FLUSH)
+ flush++;
- pr_debug("%s:%s:%d new bio=%p lba=%u(0x%x) "
- "count=%u(0x%x) dir=%d\n",
- skdev->name, __func__, __LINE__,
- bio, lba, lba, count, count, data_dir);
+ if (io_flags & REQ_FUA)
+ fua++;
- if (io_flags & REQ_FLUSH)
- flush++;
-
- if (io_flags & REQ_FUA)
- fua++;
- }
+ pr_debug("%s:%s:%d new req=%p lba=%u(0x%x) "
+ "count=%u(0x%x) dir=%d\n",
+ skdev->name, __func__, __LINE__,
+ req, lba, lba, count, count, data_dir);
/* At this point we know there is a request
* (from our bio q or req q depending on the way
* the native request. Note that skd_request_context is
* available but is still at the head of the free list.
*/
- if (!skd_bio) {
- blk_start_request(req);
- skreq->req = req;
- skreq->fitmsg_id = 0;
- } else {
- if (unlikely(flush == SKD_FLUSH_DATA_SECOND)) {
- skreq->bio = bio;
- } else {
- skreq->bio = bio_list_pop(&skdev->bio_queue);
- SKD_ASSERT(skreq->bio == bio);
- skreq->start_time = jiffies;
- part_inc_in_flight(&skdev->disk->part0,
- bio_data_dir(bio));
- }
-
- skreq->fitmsg_id = 0;
- }
+ blk_start_request(req);
+ skreq->req = req;
+ skreq->fitmsg_id = 0;
/* Either a FIT msg is in progress or we have to start one. */
if (skmsg == NULL) {
if (fua)
scsi_req->cdb[1] |= SKD_FUA_NV;
- if ((!skd_bio && !req->bio) ||
- (skd_bio && flush == SKD_FLUSH_ZERO_SIZE_FIRST))
+ if (!req->bio)
goto skip_sg;
error = skd_preop_sg_list(skdev, skreq);
* If req is non-NULL it means there is something to do but
* we are out of a resource.
*/
- if (((!skd_bio) && req) ||
- ((skd_bio) && bio_list_peek(&skdev->bio_queue)))
+ if (req)
skd_stop_queue(skdev);
}
__blk_end_request_all(skreq->req, error);
}
-static int skd_preop_sg_list_blk(struct skd_device *skdev,
+static int skd_preop_sg_list(struct skd_device *skdev,
struct skd_request_context *skreq)
{
struct request *req = skreq->req;
return 0;
}
-static void skd_postop_sg_list_blk(struct skd_device *skdev,
+static void skd_postop_sg_list(struct skd_device *skdev,
struct skd_request_context *skreq)
{
int writing = skreq->sg_data_dir == SKD_DATA_DIR_HOST_TO_CARD;
pci_unmap_sg(skdev->pdev, &skreq->sg[0], skreq->n_sg, pci_dir);
}
-static void skd_end_request_bio(struct skd_device *skdev,
- struct skd_request_context *skreq, int error)
-{
- struct bio *bio = skreq->bio;
- int rw = bio_data_dir(bio);
- unsigned long io_flags = bio->bi_rw;
-
- if ((io_flags & REQ_DISCARD) &&
- (skreq->discard_page == 1)) {
- pr_debug("%s:%s:%d biomode: skd_end_request: freeing DISCARD page.\n",
- skdev->name, __func__, __LINE__);
- free_page((unsigned long)page_address(bio->bi_io_vec->bv_page));
- }
-
- if (unlikely(error)) {
- u32 lba = (u32)skreq->bio->bi_sector;
- u32 count = bio_sectors(skreq->bio);
- char *cmd = (rw == WRITE) ? "write" : "read";
- pr_err("(%s): Error cmd=%s sect=%u count=%u id=0x%x\n",
- skd_name(skdev), cmd, lba, count, skreq->id);
- }
- {
- int cpu = part_stat_lock();
-
- if (likely(!error)) {
- part_stat_inc(cpu, &skdev->disk->part0, ios[rw]);
- part_stat_add(cpu, &skdev->disk->part0, sectors[rw],
- bio_sectors(bio));
- }
- part_stat_add(cpu, &skdev->disk->part0, ticks[rw],
- jiffies - skreq->start_time);
- part_dec_in_flight(&skdev->disk->part0, rw);
- part_stat_unlock();
- }
-
- pr_debug("%s:%s:%d id=0x%x error=%d\n",
- skdev->name, __func__, __LINE__, skreq->id, error);
-
- bio_endio(skreq->bio, error);
-}
-
-static int skd_preop_sg_list_bio(struct skd_device *skdev,
- struct skd_request_context *skreq)
-{
- struct bio *bio = skreq->bio;
- int writing = skreq->sg_data_dir == SKD_DATA_DIR_HOST_TO_CARD;
- int pci_dir = writing ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE;
- int n_sg;
- int i;
- struct bio_vec *vec;
- struct fit_sg_descriptor *sgd;
- u64 dma_addr;
- u32 count;
- int errs = 0;
- unsigned int io_flags = 0;
- io_flags |= bio->bi_rw;
-
- skreq->sg_byte_count = 0;
- n_sg = skreq->n_sg = skreq->bio->bi_vcnt;
-
- if (n_sg <= 0)
- return -EINVAL;
-
- if (n_sg > skdev->sgs_per_request) {
- pr_err("(%s): sg overflow n=%d\n",
- skd_name(skdev), n_sg);
- skreq->n_sg = 0;
- return -EIO;
- }
-
- for (i = 0; i < skreq->n_sg; i++) {
- vec = bio_iovec_idx(bio, i);
- dma_addr = pci_map_page(skdev->pdev,
- vec->bv_page,
- vec->bv_offset, vec->bv_len, pci_dir);
- count = vec->bv_len;
-
- if (count == 0 || count > 64u * 1024u || (count & 3) != 0
- || (dma_addr & 3) != 0) {
- pr_err(
- "(%s): Bad sg ix=%d count=%d addr=0x%llx\n",
- skd_name(skdev), i, count, dma_addr);
- errs++;
- }
-
- sgd = &skreq->sksg_list[i];
-
- sgd->control = FIT_SGD_CONTROL_NOT_LAST;
- sgd->byte_count = vec->bv_len;
- skreq->sg_byte_count += vec->bv_len;
- sgd->host_side_addr = dma_addr;
- sgd->dev_side_addr = 0; /* not used */
- }
-
- skreq->sksg_list[n_sg - 1].next_desc_ptr = 0LL;
- skreq->sksg_list[n_sg - 1].control = FIT_SGD_CONTROL_LAST;
-
-
- if (!(io_flags & REQ_DISCARD)) {
- count = bio_sectors(bio) << 9u;
- if (count != skreq->sg_byte_count) {
- pr_err("(%s): mismatch count sg=%d req=%d\n",
- skd_name(skdev), skreq->sg_byte_count, count);
- errs++;
- }
- }
-
- if (unlikely(skdev->dbg_level > 1)) {
- pr_debug("%s:%s:%d skreq=%x sksg_list=%p sksg_dma=%llx\n",
- skdev->name, __func__, __LINE__,
- skreq->id, skreq->sksg_list, skreq->sksg_dma_address);
- for (i = 0; i < n_sg; i++) {
- struct fit_sg_descriptor *sgd = &skreq->sksg_list[i];
- pr_debug("%s:%s:%d sg[%d] count=%u ctrl=0x%x "
- "addr=0x%llx next=0x%llx\n",
- skdev->name, __func__, __LINE__,
- i, sgd->byte_count, sgd->control,
- sgd->host_side_addr, sgd->next_desc_ptr);
- }
- }
-
- if (errs != 0) {
- skd_postop_sg_list(skdev, skreq);
- skreq->n_sg = 0;
- return -EIO;
- }
-
- return 0;
-}
-
-static int skd_preop_sg_list(struct skd_device *skdev,
- struct skd_request_context *skreq)
-{
- if (!skd_bio)
- return skd_preop_sg_list_blk(skdev, skreq);
- else
- return skd_preop_sg_list_bio(skdev, skreq);
-}
-
-static void skd_postop_sg_list_bio(struct skd_device *skdev,
- struct skd_request_context *skreq)
-{
- int writing = skreq->sg_data_dir == SKD_DATA_DIR_HOST_TO_CARD;
- int pci_dir = writing ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE;
- int i;
- struct fit_sg_descriptor *sgd;
-
- /*
- * restore the next ptr for next IO request so we
- * don't have to set it every time.
- */
- skreq->sksg_list[skreq->n_sg - 1].next_desc_ptr =
- skreq->sksg_dma_address +
- ((skreq->n_sg) * sizeof(struct fit_sg_descriptor));
-
- for (i = 0; i < skreq->n_sg; i++) {
- sgd = &skreq->sksg_list[i];
- pci_unmap_page(skdev->pdev, sgd->host_side_addr,
- sgd->byte_count, pci_dir);
- }
-}
-
-static void skd_postop_sg_list(struct skd_device *skdev,
- struct skd_request_context *skreq)
-{
- if (!skd_bio)
- skd_postop_sg_list_blk(skdev, skreq);
- else
- skd_postop_sg_list_bio(skdev, skreq);
-}
-
static void skd_end_request(struct skd_device *skdev,
struct skd_request_context *skreq, int error)
{
- if (likely(!skd_bio))
- skd_end_request_blk(skdev, skreq, error);
- else
- skd_end_request_bio(skdev, skreq, error);
+ skd_end_request_blk(skdev, skreq, error);
}
static void skd_request_fn_not_online(struct request_queue *q)
break;
case SKD_CHECK_STATUS_REQUEUE_REQUEST:
- if (!skd_bio) {
- if ((unsigned long) ++skreq->req->special <
- SKD_MAX_RETRIES) {
- skd_log_skreq(skdev, skreq, "retry");
- skd_requeue_request(skdev, skreq);
- break;
- }
+ if ((unsigned long) ++skreq->req->special < SKD_MAX_RETRIES) {
+ skd_log_skreq(skdev, skreq, "retry");
+ skd_requeue_request(skdev, skreq);
+ break;
}
/* fall through to report error */
static void skd_requeue_request(struct skd_device *skdev,
struct skd_request_context *skreq)
{
- if (!skd_bio) {
- blk_requeue_request(skdev->queue, skreq->req);
- } else {
- bio_list_add_head(&skdev->bio_queue, skreq->bio);
- skreq->bio = NULL;
- }
+ blk_requeue_request(skdev->queue, skreq->req);
}
/*
* Reset backpointer
*/
- if (likely(!skd_bio))
- skreq->req = NULL;
- else
- skreq->bio = NULL;
-
+ skreq->req = NULL;
/*
* Reclaim the skd_request_context
u32 cmp_bytes = 0;
int rc = 0;
int processed = 0;
- int ret;
-
for (;; ) {
SKD_ASSERT(skdev->skcomp_ix < SKD_N_COMPLETION_ENTRY);
if (skreq->n_sg > 0)
skd_postop_sg_list(skdev, skreq);
- if (((!skd_bio) && !skreq->req) ||
- ((skd_bio) && !skreq->bio)) {
+ if (!skreq->req) {
pr_debug("%s:%s:%d NULL backptr skdreq %p, "
"req=0x%x req_id=0x%x\n",
skdev->name, __func__, __LINE__,
* Capture the outcome and post it back to the
* native request.
*/
- if (likely(cmp_status == SAM_STAT_GOOD)) {
- if (unlikely(skreq->flush_cmd)) {
- if (skd_bio) {
- /* if empty size bio, we are all done */
- if (bio_sectors(skreq->bio) == 0) {
- skd_end_request(skdev, skreq, 0);
- } else {
- ret = skd_flush_cmd_enqueue(skdev, (void *)skreq->bio);
- if (ret != 0) {
- pr_err("Failed to enqueue flush bio with Data. Err=%d.\n", ret);
- skd_end_request(skdev, skreq, ret);
- } else {
- ((*enqueued)++);
- }
- }
- } else {
- skd_end_request(skdev, skreq, 0);
- }
- } else {
- skd_end_request(skdev, skreq, 0);
- }
- } else {
+ if (likely(cmp_status == SAM_STAT_GOOD))
+ skd_end_request(skdev, skreq, 0);
+ else
skd_resolve_req_exception(skdev, skreq);
- }
}
/*
skd_log_skreq(skdev, skreq, "recover");
SKD_ASSERT((skreq->id & SKD_ID_INCR) != 0);
- if (!skd_bio)
- SKD_ASSERT(skreq->req != NULL);
- else
- SKD_ASSERT(skreq->bio != NULL);
+ SKD_ASSERT(skreq->req != NULL);
/* Release DMA resources for the request. */
if (skreq->n_sg > 0)
skd_postop_sg_list(skdev, skreq);
- if (!skd_bio) {
- if (requeue &&
- (unsigned long) ++skreq->req->special <
- SKD_MAX_RETRIES)
- skd_requeue_request(skdev, skreq);
- else
- skd_end_request(skdev, skreq, -EIO);
- } else
+ if (requeue &&
+ (unsigned long) ++skreq->req->special <
+ SKD_MAX_RETRIES)
+ skd_requeue_request(skdev, skreq);
+ else
skd_end_request(skdev, skreq, -EIO);
- if (!skd_bio)
- skreq->req = NULL;
- else
- skreq->bio = NULL;
+ skreq->req = NULL;
skreq->state = SKD_REQ_STATE_IDLE;
skreq->id += SKD_ID_INCR;
skdev->sgs_per_request = skd_sgs_per_request;
skdev->dbg_level = skd_dbg_level;
- if (skd_bio)
- bio_list_init(&skdev->bio_queue);
-
-
atomic_set(&skdev->device_count, 0);
spin_lock_init(&skdev->lock);
INIT_WORK(&skdev->completion_worker, skd_completion_worker);
- INIT_LIST_HEAD(&skdev->flush_list);
pr_debug("%s:%s:%d skcomp\n", skdev->name, __func__, __LINE__);
rc = skd_cons_skcomp(skdev);
disk->fops = &skd_blockdev_ops;
disk->private_data = skdev;
- if (!skd_bio) {
- q = blk_init_queue(skd_request_fn, &skdev->lock);
- } else {
- q = blk_alloc_queue(GFP_KERNEL);
- q->queue_flags = QUEUE_FLAG_IO_STAT | QUEUE_FLAG_STACKABLE;
- }
-
+ q = blk_init_queue(skd_request_fn, &skdev->lock);
if (!q) {
rc = -ENOMEM;
goto err_out;
disk->queue = q;
q->queuedata = skdev;
- if (skd_bio) {
- q->queue_lock = &skdev->lock;
- blk_queue_make_request(q, skd_make_request);
- }
-
blk_queue_flush(q, REQ_FLUSH | REQ_FUA);
blk_queue_max_segments(q, skdev->sgs_per_request);
blk_queue_max_hw_sectors(q, SKD_N_MAX_SECTORS);
skdev->name, __func__, __LINE__,
skreq->timeout_stamp, skreq->sg_data_dir, skreq->n_sg);
- if (!skd_bio) {
- if (skreq->req != NULL) {
- struct request *req = skreq->req;
- u32 lba = (u32)blk_rq_pos(req);
- u32 count = blk_rq_sectors(req);
-
- pr_debug("%s:%s:%d "
- "req=%p lba=%u(0x%x) count=%u(0x%x) dir=%d\n",
- skdev->name, __func__, __LINE__,
- req, lba, lba, count, count,
- (int)rq_data_dir(req));
- } else
- pr_debug("%s:%s:%d req=NULL\n",
- skdev->name, __func__, __LINE__);
- } else {
- if (skreq->bio != NULL) {
- struct bio *bio = skreq->bio;
- u32 lba = (u32)bio->bi_sector;
- u32 count = bio_sectors(bio);
+ if (skreq->req != NULL) {
+ struct request *req = skreq->req;
+ u32 lba = (u32)blk_rq_pos(req);
+ u32 count = blk_rq_sectors(req);
- pr_debug("%s:%s:%d "
- "bio=%p lba=%u(0x%x) count=%u(0x%x) dir=%d\n",
- skdev->name, __func__, __LINE__,
- bio, lba, lba, count, count,
- (int)bio_data_dir(bio));
- } else
- pr_debug("%s:%s:%d req=NULL\n",
- skdev->name, __func__, __LINE__);
- }
+ pr_debug("%s:%s:%d "
+ "req=%p lba=%u(0x%x) count=%u(0x%x) dir=%d\n",
+ skdev->name, __func__, __LINE__,
+ req, lba, lba, count, count,
+ (int)rq_data_dir(req));
+ } else
+ pr_debug("%s:%s:%d req=NULL\n",
+ skdev->name, __func__, __LINE__);
}
/*
kmem_cache_destroy(skd_flush_slab);
}
-static int
-skd_flush_cmd_enqueue(struct skd_device *skdev, void *cmd)
-{
- struct skd_flush_cmd *item;
-
- item = kmem_cache_zalloc(skd_flush_slab, GFP_ATOMIC);
- if (!item) {
- pr_err("skd_flush_cmd_enqueue: Failed to allocated item.\n");
- return -ENOMEM;
- }
-
- item->cmd = cmd;
- list_add_tail(&item->flist, &skdev->flush_list);
- return 0;
-}
-
-static void *
-skd_flush_cmd_dequeue(struct skd_device *skdev)
-{
- void *cmd;
- struct skd_flush_cmd *item;
-
- item = list_entry(skdev->flush_list.next, struct skd_flush_cmd, flist);
- list_del_init(&item->flist);
- cmd = item->cmd;
- kmem_cache_free(skd_flush_slab, item);
- return cmd;
-}
-
module_init(skd_init);
module_exit(skd_exit);
projects / ~andy / linux / commitdiff