* Driver private area in the SCSI command structure.
*/
struct sym_ucmd { /* Override the SCSI pointer structure */
- dma_addr_t data_mapping;
- unsigned char data_mapped;
- unsigned char to_do; /* For error handling */
- void (*old_done)(struct scsi_cmnd *); /* For error handling */
- struct completion *eh_done; /* For error handling */
+ struct completion *eh_done; /* SCSI error handling */
};
#define SYM_UCMD_PTR(cmd) ((struct sym_ucmd *)(&(cmd)->SCp))
#define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host)
-static void __unmap_scsi_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
-{
- int dma_dir = cmd->sc_data_direction;
-
- switch(SYM_UCMD_PTR(cmd)->data_mapped) {
- case 2:
- pci_unmap_sg(pdev, cmd->request_buffer, cmd->use_sg, dma_dir);
- break;
- case 1:
- pci_unmap_single(pdev, SYM_UCMD_PTR(cmd)->data_mapping,
- cmd->request_bufflen, dma_dir);
- break;
- }
- SYM_UCMD_PTR(cmd)->data_mapped = 0;
-}
-
-static dma_addr_t __map_scsi_single_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
-{
- dma_addr_t mapping;
- int dma_dir = cmd->sc_data_direction;
-
- mapping = pci_map_single(pdev, cmd->request_buffer,
- cmd->request_bufflen, dma_dir);
- if (mapping) {
- SYM_UCMD_PTR(cmd)->data_mapped = 1;
- SYM_UCMD_PTR(cmd)->data_mapping = mapping;
- }
-
- return mapping;
-}
-
-static int __map_scsi_sg_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
-{
- int use_sg;
- int dma_dir = cmd->sc_data_direction;
-
- use_sg = pci_map_sg(pdev, cmd->request_buffer, cmd->use_sg, dma_dir);
- if (use_sg > 0) {
- SYM_UCMD_PTR(cmd)->data_mapped = 2;
- SYM_UCMD_PTR(cmd)->data_mapping = use_sg;
- }
-
- return use_sg;
-}
-
-#define unmap_scsi_data(np, cmd) \
- __unmap_scsi_data(np->s.device, cmd)
-#define map_scsi_single_data(np, cmd) \
- __map_scsi_single_data(np->s.device, cmd)
-#define map_scsi_sg_data(np, cmd) \
- __map_scsi_sg_data(np->s.device, cmd)
/*
* Complete a pending CAM CCB.
*/
void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd)
{
- unmap_scsi_data(np, cmd);
- cmd->scsi_done(cmd);
-}
+ struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
+ BUILD_BUG_ON(sizeof(struct scsi_pointer) < sizeof(struct sym_ucmd));
-static void sym_xpt_done2(struct sym_hcb *np, struct scsi_cmnd *cmd, int cam_status)
-{
- sym_set_cam_status(cmd, cam_status);
- sym_xpt_done(np, cmd);
-}
+ if (ucmd->eh_done)
+ complete(ucmd->eh_done);
+ scsi_dma_unmap(cmd);
+ cmd->scsi_done(cmd);
+}
/*
* Tell the SCSI layer about a BUS RESET.
*/
cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
}
- cmd->resid = resid;
+ scsi_set_resid(cmd, resid);
cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
}
-
-/*
- * Build the scatter/gather array for an I/O.
- */
-
-static int sym_scatter_no_sglist(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
-{
- struct sym_tblmove *data = &cp->phys.data[SYM_CONF_MAX_SG-1];
- int segment;
- unsigned int len = cmd->request_bufflen;
-
- if (len) {
- dma_addr_t baddr = map_scsi_single_data(np, cmd);
- if (baddr) {
- if (len & 1) {
- struct sym_tcb *tp = &np->target[cp->target];
- if (tp->head.wval & EWS) {
- len++;
- cp->odd_byte_adjustment++;
- }
- }
- cp->data_len = len;
- sym_build_sge(np, data, baddr, len);
- segment = 1;
- } else {
- segment = -2;
- }
- } else {
- segment = 0;
- }
-
- return segment;
-}
-
static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
{
int segment;
- int use_sg = (int) cmd->use_sg;
+ int use_sg;
cp->data_len = 0;
- if (!use_sg)
- segment = sym_scatter_no_sglist(np, cp, cmd);
- else if ((use_sg = map_scsi_sg_data(np, cmd)) > 0) {
- struct scatterlist *scatter = (struct scatterlist *)cmd->request_buffer;
+ use_sg = scsi_dma_map(cmd);
+ if (use_sg > 0) {
+ struct scatterlist *sg;
struct sym_tcb *tp = &np->target[cp->target];
struct sym_tblmove *data;
if (use_sg > SYM_CONF_MAX_SG) {
- unmap_scsi_data(np, cmd);
+ scsi_dma_unmap(cmd);
return -1;
}
data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
- for (segment = 0; segment < use_sg; segment++) {
- dma_addr_t baddr = sg_dma_address(&scatter[segment]);
- unsigned int len = sg_dma_len(&scatter[segment]);
+ scsi_for_each_sg(cmd, sg, use_sg, segment) {
+ dma_addr_t baddr = sg_dma_address(sg);
+ unsigned int len = sg_dma_len(sg);
if ((len & 1) && (tp->head.wval & EWS)) {
len++;
struct sym_ccb *cp;
int order;
- /*
- * Minimal checkings, so that we will not
- * go outside our tables.
- */
- if (sdev->id == np->myaddr) {
- sym_xpt_done2(np, cmd, DID_NO_CONNECT);
- return 0;
- }
-
/*
* Retrieve the target descriptor.
*/
struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
int sts = 0;
- cmd->scsi_done = done;
+ cmd->scsi_done = done;
memset(ucp, 0, sizeof(*ucp));
/*
/*
* Linux entry point of the interrupt handler.
*/
-static irqreturn_t sym53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs)
+static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
{
- unsigned long flags;
- struct sym_hcb *np = (struct sym_hcb *)dev_id;
+ struct sym_hcb *np = dev_id;
+
+ /* Avoid spinloop trying to handle interrupts on frozen device */
+ if (pci_channel_offline(np->s.device))
+ return IRQ_NONE;
if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
- spin_lock_irqsave(np->s.host->host_lock, flags);
+ spin_lock(np->s.host->host_lock);
sym_interrupt(np);
- spin_unlock_irqrestore(np->s.host->host_lock, flags);
+ spin_unlock(np->s.host->host_lock);
if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
#define SYM_EH_BUS_RESET 2
#define SYM_EH_HOST_RESET 3
-/*
- * What we will do regarding the involved SCSI command.
- */
-#define SYM_EH_DO_IGNORE 0
-#define SYM_EH_DO_WAIT 2
-
-/*
- * scsi_done() alias when error recovery is in progress.
- */
-static void sym_eh_done(struct scsi_cmnd *cmd)
-{
- struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
- BUILD_BUG_ON(sizeof(struct scsi_pointer) < sizeof(struct sym_ucmd));
-
- cmd->scsi_done = ucmd->old_done;
-
- if (ucmd->to_do == SYM_EH_DO_WAIT)
- complete(ucmd->eh_done);
-}
-
/*
* Generic method for our eh processing.
* The 'op' argument tells what we have to do.
struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
struct Scsi_Host *host = cmd->device->host;
+ struct pci_dev *pdev = np->s.device;
SYM_QUEHEAD *qp;
- int to_do = SYM_EH_DO_IGNORE;
+ int cmd_queued = 0;
int sts = -1;
struct completion eh_done;
dev_warn(&cmd->device->sdev_gendev, "%s operation started.\n", opname);
+ /* We may be in an error condition because the PCI bus
+ * went down. In this case, we need to wait until the
+ * PCI bus is reset, the card is reset, and only then
+ * proceed with the scsi error recovery. There's no
+ * point in hurrying; take a leisurely wait.
+ */
+#define WAIT_FOR_PCI_RECOVERY 35
+ if (pci_channel_offline(pdev)) {
+ struct host_data *hostdata = shost_priv(host);
+ struct completion *io_reset;
+ int finished_reset = 0;
+ init_completion(&eh_done);
+ spin_lock_irq(host->host_lock);
+ /* Make sure we didn't race */
+ if (pci_channel_offline(pdev)) {
+ if (!hostdata->io_reset)
+ hostdata->io_reset = &eh_done;
+ io_reset = hostdata->io_reset;
+ } else {
+ io_reset = NULL;
+ }
+
+ if (!pci_channel_offline(pdev))
+ finished_reset = 1;
+ spin_unlock_irq(host->host_lock);
+ if (!finished_reset)
+ finished_reset = wait_for_completion_timeout(io_reset,
+ WAIT_FOR_PCI_RECOVERY*HZ);
+ if (!finished_reset)
+ return SCSI_FAILED;
+ }
+
spin_lock_irq(host->host_lock);
/* This one is queued in some place -> to wait for completion */
FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
if (cp->cmd == cmd) {
- to_do = SYM_EH_DO_WAIT;
+ cmd_queued = 1;
break;
}
}
- if (to_do == SYM_EH_DO_WAIT) {
- init_completion(&eh_done);
- ucmd->old_done = cmd->scsi_done;
- ucmd->eh_done = &eh_done;
- wmb();
- cmd->scsi_done = sym_eh_done;
- }
-
/* Try to proceed the operation we have been asked for */
sts = -1;
switch(op) {
break;
case SYM_EH_HOST_RESET:
sym_reset_scsi_bus(np, 0);
- sym_start_up (np, 1);
+ sym_start_up(np, 1);
sts = 0;
break;
default:
}
/* On error, restore everything and cross fingers :) */
- if (sts) {
- cmd->scsi_done = ucmd->old_done;
- to_do = SYM_EH_DO_IGNORE;
- }
-
- ucmd->to_do = to_do;
- spin_unlock_irq(host->host_lock);
+ if (sts)
+ cmd_queued = 0;
- if (to_do == SYM_EH_DO_WAIT) {
+ if (cmd_queued) {
+ init_completion(&eh_done);
+ ucmd->eh_done = &eh_done;
+ spin_unlock_irq(host->host_lock);
if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
- ucmd->to_do = SYM_EH_DO_IGNORE;
- wmb();
+ ucmd->eh_done = NULL;
sts = -2;
}
+ } else {
+ spin_unlock_irq(host->host_lock);
}
+
dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
return sts ? SCSI_FAILED : SCSI_SUCCESS;
info.pos = 0;
copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
- "revision id 0x%x\n",
- np->s.chip_name, np->device_id, np->revision_id);
+ "revision id 0x%x\n", np->s.chip_name,
+ np->device_id, np->s.device->revision);
copy_info(&info, "At PCI address %s, IRQ " IRQ_FMT "\n",
- pci_name(np->s.device), IRQ_PRM(np->s.irq));
+ pci_name(np->s.device), IRQ_PRM(np->s.device->irq));
copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
(int) (np->minsync_dt ? np->minsync_dt : np->minsync),
np->maxwide ? "Wide" : "Narrow",
/*
* Free O/S specific resources.
*/
- if (np->s.irq)
- free_irq(np->s.irq, np);
+ if (pdev->irq)
+ free_irq(pdev->irq, np);
if (np->s.ioaddr)
pci_iounmap(pdev, np->s.ioaddr);
if (np->s.ramaddr)
unsigned long flags;
struct sym_fw *fw;
- printk(KERN_INFO
- "sym%d: <%s> rev 0x%x at pci %s irq " IRQ_FMT "\n",
- unit, dev->chip.name, dev->chip.revision_id,
- pci_name(pdev), IRQ_PRM(pdev->irq));
+ printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq " IRQ_FMT "\n",
+ unit, dev->chip.name, pdev->revision, pci_name(pdev),
+ IRQ_PRM(pdev->irq));
/*
* Get the firmware for this chip.
np->s.device = pdev;
np->s.unit = unit;
np->device_id = dev->chip.device_id;
- np->revision_id = dev->chip.revision_id;
np->features = dev->chip.features;
np->clock_divn = dev->chip.nr_divisor;
np->maxoffs = dev->chip.offset_max;
sym_name(np), pdev->irq);
goto attach_failed;
}
- np->s.irq = pdev->irq;
/*
* After SCSI devices have been opened, we cannot
/*
* Start the SCRIPTS.
*/
- sym_start_up (np, 1);
+ sym_start_up(np, 1);
/*
* Start the timer daemon
BUG_ON(sym2_transport_template == NULL);
instance->transportt = sym2_transport_template;
+ /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
+ if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 2)
+ instance->dma_boundary = 0xFFFFFF;
+
spin_unlock_irqrestore(instance->host_lock, flags);
return instance;
{
struct sym_chip *chip;
struct pci_dev *pdev = device->pdev;
- u_char revision;
unsigned long io_port = pci_resource_start(pdev, 0);
int i;
* to our device structure so we can make it match the actual device
* and options.
*/
- pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
- chip = sym_lookup_chip_table(pdev->device, revision);
+ chip = sym_lookup_chip_table(pdev->device, pdev->revision);
if (!chip) {
dev_info(&pdev->dev, "device not supported\n");
return -ENODEV;
}
memcpy(&device->chip, chip, sizeof(device->chip));
- device->chip.revision_id = revision;
return 0;
}
* We must ensure the chip will use WRITE AND INVALIDATE.
* The revision number limit is for now arbitrary.
*/
- if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && chip->revision_id < 0x4) {
+ if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 0x4) {
chip->features |= (FE_WRIE | FE_CLSE);
}
.eh_host_reset_handler = sym53c8xx_eh_host_reset_handler,
.this_id = 7,
.use_clustering = ENABLE_CLUSTERING,
+ .use_sg_chaining = ENABLE_SG_CHAINING,
.max_sectors = 0xFFFF,
#ifdef SYM_LINUX_PROC_INFO_SUPPORT
.proc_info = sym53c8xx_proc_info,
attach_count--;
}
+/**
+ * sym2_io_error_detected() - called when PCI error is detected
+ * @pdev: pointer to PCI device
+ * @state: current state of the PCI slot
+ */
+static pci_ers_result_t sym2_io_error_detected(struct pci_dev *pdev,
+ enum pci_channel_state state)
+{
+ /* If slot is permanently frozen, turn everything off */
+ if (state == pci_channel_io_perm_failure) {
+ sym2_remove(pdev);
+ return PCI_ERS_RESULT_DISCONNECT;
+ }
+
+ disable_irq(pdev->irq);
+ pci_disable_device(pdev);
+
+ /* Request that MMIO be enabled, so register dump can be taken. */
+ return PCI_ERS_RESULT_CAN_RECOVER;
+}
+
+/**
+ * sym2_io_slot_dump - Enable MMIO and dump debug registers
+ * @pdev: pointer to PCI device
+ */
+static pci_ers_result_t sym2_io_slot_dump(struct pci_dev *pdev)
+{
+ struct sym_hcb *np = pci_get_drvdata(pdev);
+
+ sym_dump_registers(np);
+
+ /* Request a slot reset. */
+ return PCI_ERS_RESULT_NEED_RESET;
+}
+
+/**
+ * sym2_reset_workarounds - hardware-specific work-arounds
+ *
+ * This routine is similar to sym_set_workarounds(), except
+ * that, at this point, we already know that the device was
+ * succesfully intialized at least once before, and so most
+ * of the steps taken there are un-needed here.
+ */
+static void sym2_reset_workarounds(struct pci_dev *pdev)
+{
+ u_short status_reg;
+ struct sym_chip *chip;
+
+ chip = sym_lookup_chip_table(pdev->device, pdev->revision);
+
+ /* Work around for errant bit in 895A, in a fashion
+ * similar to what is done in sym_set_workarounds().
+ */
+ pci_read_config_word(pdev, PCI_STATUS, &status_reg);
+ if (!(chip->features & FE_66MHZ) && (status_reg & PCI_STATUS_66MHZ)) {
+ status_reg = PCI_STATUS_66MHZ;
+ pci_write_config_word(pdev, PCI_STATUS, status_reg);
+ pci_read_config_word(pdev, PCI_STATUS, &status_reg);
+ }
+}
+
+/**
+ * sym2_io_slot_reset() - called when the pci bus has been reset.
+ * @pdev: pointer to PCI device
+ *
+ * Restart the card from scratch.
+ */
+static pci_ers_result_t sym2_io_slot_reset(struct pci_dev *pdev)
+{
+ struct sym_hcb *np = pci_get_drvdata(pdev);
+
+ printk(KERN_INFO "%s: recovering from a PCI slot reset\n",
+ sym_name(np));
+
+ if (pci_enable_device(pdev)) {
+ printk(KERN_ERR "%s: Unable to enable after PCI reset\n",
+ sym_name(np));
+ return PCI_ERS_RESULT_DISCONNECT;
+ }
+
+ pci_set_master(pdev);
+ enable_irq(pdev->irq);
+
+ /* If the chip can do Memory Write Invalidate, enable it */
+ if (np->features & FE_WRIE) {
+ if (pci_set_mwi(pdev))
+ return PCI_ERS_RESULT_DISCONNECT;
+ }
+
+ /* Perform work-arounds, analogous to sym_set_workarounds() */
+ sym2_reset_workarounds(pdev);
+
+ /* Perform host reset only on one instance of the card */
+ if (PCI_FUNC(pdev->devfn) == 0) {
+ if (sym_reset_scsi_bus(np, 0)) {
+ printk(KERN_ERR "%s: Unable to reset scsi host\n",
+ sym_name(np));
+ return PCI_ERS_RESULT_DISCONNECT;
+ }
+ sym_start_up(np, 1);
+ }
+
+ return PCI_ERS_RESULT_RECOVERED;
+}
+
+/**
+ * sym2_io_resume() - resume normal ops after PCI reset
+ * @pdev: pointer to PCI device
+ *
+ * Called when the error recovery driver tells us that its
+ * OK to resume normal operation. Use completion to allow
+ * halted scsi ops to resume.
+ */
+static void sym2_io_resume(struct pci_dev *pdev)
+{
+ struct sym_hcb *np = pci_get_drvdata(pdev);
+ struct Scsi_Host *shost = np->s.host;
+ struct host_data *hostdata = shost_priv(shost);
+
+ spin_lock_irq(shost->host_lock);
+ if (hostdata->io_reset)
+ complete_all(hostdata->io_reset);
+ hostdata->io_reset = NULL;
+ spin_unlock_irq(shost->host_lock);
+}
+
static void sym2_get_signalling(struct Scsi_Host *shost)
{
struct sym_hcb *np = sym_get_hcb(shost);
{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
- PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
+ PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8, 0xffff00, 0UL }, /* new */
{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
{ PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
MODULE_DEVICE_TABLE(pci, sym2_id_table);
+static struct pci_error_handlers sym2_err_handler = {
+ .error_detected = sym2_io_error_detected,
+ .mmio_enabled = sym2_io_slot_dump,
+ .slot_reset = sym2_io_slot_reset,
+ .resume = sym2_io_resume,
+};
+
static struct pci_driver sym2_driver = {
.name = NAME53C8XX,
.id_table = sym2_id_table,
.probe = sym2_probe,
.remove = __devexit_p(sym2_remove),
+ .err_handler = &sym2_err_handler,
};
static int __init sym2_init(void)
projects / ~andy / linux / blobdiff