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Date: Wed, 11 Nov 2009 10:51:40 -0600
From: "Stephen M. Cameron" <scameron@...rdog.cce.hp.com>
To: akpm@...ux-foundation.org, James.Bottomley@...senPartnership.com
Cc: linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
scameron@...rdog.cce.hp.com, mikem@...rdog.cce.hp.com
Subject: [PATCH 15/17] hpsa: Remove sendcmd,
in no case are we required to poll for completions.
hpsa: Remove sendcmd, there are no instances in which we must poll for
command completion. This means sendcmd_core() and pollcomplete()
can be removed as well.
Signed-off-by: Stephen M. Cameron <scameron@...rdog.cce.hp.com>
---
drivers/scsi/hpsa.c | 156 ---------------------------------------------------
1 files changed, 0 insertions(+), 156 deletions(-)
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index d171a55..6dc7ce6 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -117,8 +117,6 @@ static int number_of_controllers;
static irqreturn_t do_hpsa_intr(int irq, void *dev_id);
static int hpsa_ioctl(struct scsi_device *dev, int cmd, void *arg);
static void start_io(struct ctlr_info *h);
-static int sendcmd(__u8 cmd, struct ctlr_info *h, void *buff, size_t size,
- __u8 page_code, unsigned char *scsi3addr, int cmd_type);
#ifdef CONFIG_COMPAT
static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void *arg);
@@ -131,7 +129,6 @@ static struct CommandList *cmd_special_alloc(struct ctlr_info *h);
static int fill_cmd(struct CommandList *c, __u8 cmd, struct ctlr_info *h,
void *buff, size_t size, __u8 page_code, unsigned char *scsi3addr,
int cmd_type);
-static int sendcmd_core(struct ctlr_info *h, struct CommandList *c);
static int hpsa_scsi_queue_command(struct scsi_cmnd *cmd,
void (*done)(struct scsi_cmnd *));
@@ -2685,159 +2682,6 @@ static int fill_cmd(struct CommandList *c, __u8 cmd, struct ctlr_info *h,
}
/*
- * Wait polling for a command to complete.
- * The memory mapped FIFO is polled for the completion.
- * Used only at init time, interrupts from the HBA are disabled.
- */
-static unsigned long pollcomplete(struct ctlr_info *h)
-{
- unsigned long done;
- int i;
-
- /* Wait (up to HPSA_MAX_POLL_TIME_SECS) for a command to complete */
- for (i = HPSA_MAX_POLL_TIME_SECS * HZ; i > 0; i--) {
- done = h->access.command_completed(h);
- if (done == FIFO_EMPTY)
- schedule_timeout_uninterruptible(1);
- else
- return done;
- }
- /* Invalid address to tell caller we ran out of time */
- dev_warn(&h->pdev->dev, "pollcomplete(): returning 1\n");
- return 1;
-}
-
-/* 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.
- */
-static int sendcmd_core(struct ctlr_info *h, struct CommandList *c)
-{
- int i;
- unsigned long complete;
- int status = IO_ERROR;
-
-resend_cmd1:
- /*
- * Disable interrupt
- */
- h->access.set_intr_mask(h, HPSA_INTR_OFF);
-
- /* Make sure there is room in the command FIFO
- * Actually it should be completely empty at this time
- * unless we are in here doing error handling for the scsi
- * side of the driver.
- */
- for (i = 200000; i > 0; i--) {
- /* if fifo isn't full go */
- if (!(h->access.fifo_full(h)))
- break;
- udelay(10);
- dev_warn(&h->pdev->dev, "sendcmd FIFO full, waiting!\n");
- }
- h->access.submit_command(h, c); /* Send the cmd */
- do {
- complete = pollcomplete(h);
-
- if (complete == 1) {
- dev_warn(&h->pdev->dev,
- "sendcmd timeout, no command list address "
- "returned!\n");
- status = IO_ERROR;
- break;
- }
-
- /* If it's not the cmd we're looking for, save it for later */
- if ((complete & ~HPSA_ERROR_BIT) != c->busaddr) {
- dev_warn(&h->pdev->dev, "unexpected command "
- "completion.\n");
- continue;
- }
-
- /* It is our command. If no error, we're done. */
- if (!(complete & HPSA_ERROR_BIT)) {
- status = IO_OK;
- break;
- }
-
- /* There is an error... */
-
- /* if data overrun or underun on Report command ignore it */
- if (((c->Request.CDB[0] == HPSA_REPORT_LOG) ||
- (c->Request.CDB[0] == HPSA_REPORT_PHYS) ||
- (c->Request.CDB[0] == HPSA_INQUIRY)) &&
- ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) ||
- (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) {
- complete = c->busaddr;
- status = IO_OK;
- break;
- }
- if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) {
- dev_warn(&h->pdev->dev, "unsolicited abort %p\n", c);
- if (c->retry_count < MAX_CMD_RETRIES) {
- dev_warn(&h->pdev->dev, "retrying %p\n", c);
- c->retry_count++;
- /* erase the old error information */
- memset(c->err_info, 0, sizeof(c->err_info));
- goto resend_cmd1;
- }
- dev_warn(&h->pdev->dev,
- "retried %p too many times\n", c);
- status = IO_ERROR;
- goto cleanup1;
- }
- if (c->err_info->CommandStatus == CMD_UNABORTABLE) {
- dev_warn(&h->pdev->dev,
- "command could not be aborted.\n");
- status = IO_ERROR;
- goto cleanup1;
- }
- dev_warn(&h->pdev->dev, "sendcmd error\n");
- dev_warn(&h->pdev->dev,
- "cmd = 0x%02x, CommandStatus = 0x%02x\n",
- c->Request.CDB[0], c->err_info->CommandStatus);
- if (c->err_info->CommandStatus == CMD_TARGET_STATUS) {
- dev_warn(&h->pdev->dev, "target status = 0x%02x\n",
- c->err_info->ScsiStatus);
- if (c->err_info->ScsiStatus == 2) /* chk cond */
- dev_warn(&h->pdev->dev, "sense key = 0x%02x\n",
- 0xf & c->err_info->SenseInfo[2]);
- }
-
- status = IO_ERROR;
- goto cleanup1;
-
- } while (1);
-
-cleanup1:
- hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
- return status;
-}
-
-/*
- * Send a command to the controller, and wait for it to complete.
- * Used at init time, and during SCSI error recovery.
- */
-static int sendcmd(__u8 cmd, struct ctlr_info *h, void *buff, size_t size,
- __u8 page_code, unsigned char *scsi3addr, int cmd_type)
-{
- struct CommandList *c;
- int status;
-
- c = cmd_alloc(h);
- if (c == NULL) {
- dev_warn(&h->pdev->dev, "unable to get memory");
- return IO_ERROR;
- }
- status = fill_cmd(c, cmd, h, buff, size, page_code,
- scsi3addr, cmd_type);
- if (status == IO_OK)
- status = sendcmd_core(h, c);
- cmd_free(h, c);
- return status;
-}
-
-/*
* Map (physical) PCI mem into (virtual) kernel space
*/
static void __iomem *remap_pci_mem(ulong base, ulong size)
--
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