#include <linux/hdreg.h>
#include <linux/spinlock.h>
#include <linux/compat.h>
-#include <linux/blktrace_api.h>
#include <asm/uaccess.h>
#include <asm/io.h>
static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
__u8 page_code, unsigned char scsi3addr[],
int cmd_type);
+static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
+ int attempt_retry);
+static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
static void fail_all_cmds(unsigned long ctlr);
static int scan_thread(void *data);
return IO_ERROR;
}
-static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c)
+static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
{
- DECLARE_COMPLETION_ONSTACK(wait);
- u64bit buff_dma_handle;
- unsigned long flags;
int return_status = IO_OK;
-resend_cmd2:
- c->waiting = &wait;
- /* Put the request on the tail of the queue and send it */
- spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
- addQ(&h->reqQ, c);
- h->Qdepth++;
- start_io(h);
- spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
-
- wait_for_completion(&wait);
-
- if (c->err_info->CommandStatus == 0)
- goto command_done;
+ if (c->err_info->CommandStatus == CMD_SUCCESS)
+ return IO_OK;
switch (c->err_info->CommandStatus) {
case CMD_TARGET_STATUS:
/* expected for inquiry and report lun commands */
break;
case CMD_INVALID:
- printk(KERN_WARNING "cciss: Cmd 0x%02x is "
+ printk(KERN_WARNING "cciss: cmd 0x%02x is "
"reported invalid\n", c->Request.CDB[0]);
return_status = IO_ERROR;
break;
printk(KERN_WARNING
"cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
c->Request.CDB[0]);
- if (c->retry_count < MAX_CMD_RETRIES) {
- printk(KERN_WARNING
- "cciss%d: retrying 0x%02x\n", h->ctlr,
- c->Request.CDB[0]);
- c->retry_count++;
- /* erase the old error information */
- memset(c->err_info, 0,
- sizeof(ErrorInfo_struct));
- return_status = IO_OK;
- INIT_COMPLETION(wait);
- goto resend_cmd2;
- }
- return_status = IO_ERROR;
+ return_status = IO_NEEDS_RETRY;
break;
default:
printk(KERN_WARNING "cciss: cmd 0x%02x returned "
c->err_info->CommandStatus);
return_status = IO_ERROR;
}
+ return return_status;
+}
+
+static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
+ int attempt_retry)
+{
+ DECLARE_COMPLETION_ONSTACK(wait);
+ u64bit buff_dma_handle;
+ unsigned long flags;
+ int return_status = IO_OK;
+
+resend_cmd2:
+ c->waiting = &wait;
+ /* Put the request on the tail of the queue and send it */
+ spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
+ addQ(&h->reqQ, c);
+ h->Qdepth++;
+ start_io(h);
+ spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+
+ wait_for_completion(&wait);
+
+ if (c->err_info->CommandStatus == 0 || !attempt_retry)
+ goto command_done;
+
+ return_status = process_sendcmd_error(h, c);
+
+ if (return_status == IO_NEEDS_RETRY &&
+ c->retry_count < MAX_CMD_RETRIES) {
+ printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
+ c->Request.CDB[0]);
+ c->retry_count++;
+ /* erase the old error information */
+ memset(c->err_info, 0, sizeof(ErrorInfo_struct));
+ return_status = IO_OK;
+ INIT_COMPLETION(wait);
+ goto resend_cmd2;
+ }
command_done:
/* unlock the buffers from DMA */
return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
scsi3addr, cmd_type);
if (return_status == IO_OK)
- return_status = sendcmd_withirq_core(h, c);
+ return_status = sendcmd_withirq_core(h, c, 1);
+
cmd_free(h, c, 0);
return return_status;
}
return 1;
}
-static int add_sendcmd_reject(__u8 cmd, int ctlr, unsigned long complete)
-{
- /* We get in here if sendcmd() is polling for completions
- and gets some command back that it wasn't expecting --
- something other than that which it just sent down.
- Ordinarily, that shouldn't happen, but it can happen when
- the scsi tape stuff gets into error handling mode, and
- starts using sendcmd() to try to abort commands and
- reset tape drives. In that case, sendcmd may pick up
- completions of commands that were sent to logical drives
- through the block i/o system, or cciss ioctls completing, etc.
- In that case, we need to save those completions for later
- processing by the interrupt handler.
- */
-
-#ifdef CONFIG_CISS_SCSI_TAPE
- struct sendcmd_reject_list *srl = &hba[ctlr]->scsi_rejects;
-
- /* If it's not the scsi tape stuff doing error handling, (abort */
- /* or reset) then we don't expect anything weird. */
- if (cmd != CCISS_RESET_MSG && cmd != CCISS_ABORT_MSG) {
-#endif
- printk(KERN_WARNING "cciss cciss%d: SendCmd "
- "Invalid command list address returned! (%lx)\n",
- ctlr, complete);
- /* not much we can do. */
-#ifdef CONFIG_CISS_SCSI_TAPE
- return 1;
- }
-
- /* We've sent down an abort or reset, but something else
- has completed */
- if (srl->ncompletions >= (hba[ctlr]->nr_cmds + 2)) {
- /* Uh oh. No room to save it for later... */
- printk(KERN_WARNING "cciss%d: Sendcmd: Invalid command addr, "
- "reject list overflow, command lost!\n", ctlr);
- return 1;
- }
- /* Save it for later */
- srl->complete[srl->ncompletions] = complete;
- srl->ncompletions++;
-#endif
- return 0;
-}
-
/* Send command c to controller h and poll for it to complete.
* Turns interrupts off on the board. Used at driver init time
* and during SCSI error recovery.
break;
}
- /* If it's not the cmd we're looking for, save it for later */
+ /* Make sure it's the command we're expecting. */
if ((complete & ~CISS_ERROR_BIT) != c->busaddr) {
- if (add_sendcmd_reject(c->Request.CDB[0],
- h->ctlr, complete) != 0)
- BUG(); /* we are hosed if we get here. */
+ printk(KERN_WARNING "cciss%d: Unexpected command "
+ "completion.\n", h->ctlr);
continue;
}
buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
-#ifdef CONFIG_CISS_SCSI_TAPE
- /* if we saved some commands for later, process them now. */
- if (h->scsi_rejects.ncompletions > 0)
- do_cciss_intr(0, h);
-#endif
return status;
}
static inline unsigned long get_next_completion(ctlr_info_t *h)
{
-#ifdef CONFIG_CISS_SCSI_TAPE
- /* Any rejects from sendcmd() lying around? Process them first */
- if (h->scsi_rejects.ncompletions == 0)
- return h->access.command_completed(h);
- else {
- struct sendcmd_reject_list *srl;
- int n;
- srl = &h->scsi_rejects;
- n = --srl->ncompletions;
- /* printk("cciss%d: processing saved reject\n", h->ctlr); */
- printk("p");
- return srl->complete[n];
- }
-#else
return h->access.command_completed(h);
-#endif
}
static inline int interrupt_pending(ctlr_info_t *h)
{
-#ifdef CONFIG_CISS_SCSI_TAPE
- return (h->access.intr_pending(h)
- || (h->scsi_rejects.ncompletions > 0));
-#else
return h->access.intr_pending(h);
-#endif
}
static inline long interrupt_not_for_us(ctlr_info_t *h)
{
-#ifdef CONFIG_CISS_SCSI_TAPE
- return (((h->access.intr_pending(h) == 0) ||
- (h->interrupts_enabled == 0))
- && (h->scsi_rejects.ncompletions == 0));
-#else
return (((h->access.intr_pending(h) == 0) ||
(h->interrupts_enabled == 0)));
-#endif
}
static irqreturn_t do_cciss_intr(int irq, void *dev_id)
printk(KERN_ERR "cciss: out of memory");
goto clean4;
}
-#ifdef CONFIG_CISS_SCSI_TAPE
- hba[i]->scsi_rejects.complete =
- kmalloc(sizeof(hba[i]->scsi_rejects.complete[0]) *
- (hba[i]->nr_cmds + 5), GFP_KERNEL);
- if (hba[i]->scsi_rejects.complete == NULL) {
- printk(KERN_ERR "cciss: out of memory");
- goto clean4;
- }
-#endif
spin_lock_init(&hba[i]->lock);
/* Initialize the pdev driver private data.
clean4:
kfree(inq_buff);
-#ifdef CONFIG_CISS_SCSI_TAPE
- kfree(hba[i]->scsi_rejects.complete);
-#endif
kfree(hba[i]->cmd_pool_bits);
if (hba[i]->cmd_pool)
pci_free_consistent(hba[i]->pdev,
pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
kfree(hba[i]->cmd_pool_bits);
-#ifdef CONFIG_CISS_SCSI_TAPE
- kfree(hba[i]->scsi_rejects.complete);
-#endif
/*
* Deliberately omit pci_disable_device(): it does something nasty to
* Smart Array controllers that pci_enable_device does not undo
projects / firefly-linux-kernel-4.4.55.git / blobdiff