forked from Minki/linux
cciss: factor out core of sendcmd() for a more sane interface
Factor out the core of sendcmd() to provide a simpler interface which exposes all the error information to the caller and make the original sendcmd use this new function. Rationale: The SCSI error handling routines need to send commands with interrupts turned off, but they also need access to the full error information. Signed-off-by: Stephen M. Cameron <scameron@beardog.cca.cpqcorp.net> Cc: Mike Miller <mikem@beardog.cca.cpqcorp.net> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Stephen M. Cameron
Jens Axboe
parent
53c663ce0f
commit
4a4b2d7684
@ -2373,41 +2373,21 @@ static int add_sendcmd_reject(__u8 cmd, int ctlr, unsigned long complete)
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return 0;
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}
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/*
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* Send a command to the controller, and wait for it to complete.
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* Only used at init time.
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/* Send command c to controller h and poll for it to complete.
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* Turns interrupts off on the board. Used at driver init time
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* and during SCSI error recovery.
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*/
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static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size, unsigned int use_unit_num, /* 0: address the controller,
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1: address logical volume log_unit,
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2: periph device address is scsi3addr */
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unsigned int log_unit,
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__u8 page_code, unsigned char *scsi3addr, int cmd_type)
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static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c)
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{
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CommandList_struct *c;
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int i;
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unsigned long complete;
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ctlr_info_t *info_p = hba[ctlr];
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int status = IO_ERROR;
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u64bit buff_dma_handle;
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int status, done = 0;
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if ((c = cmd_alloc(info_p, 1)) == NULL) {
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printk(KERN_WARNING "cciss: unable to get memory");
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return IO_ERROR;
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}
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status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
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log_unit, page_code, scsi3addr, cmd_type);
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if (status != IO_OK) {
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cmd_free(info_p, c, 1);
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return status;
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}
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resend_cmd1:
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/*
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* Disable interrupt
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*/
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#ifdef CCISS_DEBUG
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printk(KERN_DEBUG "cciss: turning intr off\n");
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#endif /* CCISS_DEBUG */
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info_p->access.set_intr_mask(info_p, CCISS_INTR_OFF);
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resend_cmd1:
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/* Disable interrupt on the board. */
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h->access.set_intr_mask(h, CCISS_INTR_OFF);
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/* Make sure there is room in the command FIFO */
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/* Actually it should be completely empty at this time */
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@ -2415,21 +2395,15 @@ static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size, unsigned int use
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/* tape side of the driver. */
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for (i = 200000; i > 0; i--) {
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/* if fifo isn't full go */
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if (!(info_p->access.fifo_full(info_p))) {
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if (!(h->access.fifo_full(h)))
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break;
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}
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udelay(10);
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printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
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" waiting!\n", ctlr);
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" waiting!\n", h->ctlr);
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}
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/*
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* Send the cmd
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*/
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info_p->access.submit_command(info_p, c);
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done = 0;
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h->access.submit_command(h, c); /* Send the cmd */
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do {
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complete = pollcomplete(ctlr);
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complete = pollcomplete(h->ctlr);
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#ifdef CCISS_DEBUG
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printk(KERN_DEBUG "cciss: command completed\n");
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@ -2438,97 +2412,116 @@ static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size, unsigned int use
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if (complete == 1) {
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printk(KERN_WARNING
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"cciss cciss%d: SendCmd Timeout out, "
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"No command list address returned!\n", ctlr);
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"No command list address returned!\n", h->ctlr);
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status = IO_ERROR;
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done = 1;
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break;
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}
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/* This will need to change for direct lookup completions */
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if ((complete & CISS_ERROR_BIT)
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&& (complete & ~CISS_ERROR_BIT) == c->busaddr) {
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/* if data overrun or underun on Report command
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ignore it
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*/
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if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
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(c->Request.CDB[0] == CISS_REPORT_PHYS) ||
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(c->Request.CDB[0] == CISS_INQUIRY)) &&
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((c->err_info->CommandStatus ==
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CMD_DATA_OVERRUN) ||
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(c->err_info->CommandStatus == CMD_DATA_UNDERRUN)
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)) {
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complete = c->busaddr;
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} else {
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if (c->err_info->CommandStatus ==
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CMD_UNSOLICITED_ABORT) {
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printk(KERN_WARNING "cciss%d: "
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"unsolicited abort %p\n",
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ctlr, c);
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if (c->retry_count < MAX_CMD_RETRIES) {
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printk(KERN_WARNING
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"cciss%d: retrying %p\n",
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ctlr, c);
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c->retry_count++;
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/* erase the old error */
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/* information */
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memset(c->err_info, 0,
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sizeof
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(ErrorInfo_struct));
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goto resend_cmd1;
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} else {
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printk(KERN_WARNING
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"cciss%d: retried %p too "
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"many times\n", ctlr, c);
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status = IO_ERROR;
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goto cleanup1;
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}
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} else if (c->err_info->CommandStatus ==
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CMD_UNABORTABLE) {
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printk(KERN_WARNING
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"cciss%d: command could not be aborted.\n",
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ctlr);
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status = IO_ERROR;
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goto cleanup1;
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}
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printk(KERN_WARNING "ciss ciss%d: sendcmd"
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" Error %x \n", ctlr,
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c->err_info->CommandStatus);
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printk(KERN_WARNING "ciss ciss%d: sendcmd"
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" offensive info\n"
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" size %x\n num %x value %x\n",
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ctlr,
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c->err_info->MoreErrInfo.Invalid_Cmd.
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offense_size,
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c->err_info->MoreErrInfo.Invalid_Cmd.
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offense_num,
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c->err_info->MoreErrInfo.Invalid_Cmd.
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offense_value);
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status = IO_ERROR;
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goto cleanup1;
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}
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}
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/* This will need changing for direct lookup completions */
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if (complete != c->busaddr) {
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if (add_sendcmd_reject(cmd, ctlr, complete) != 0) {
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BUG(); /* we are pretty much hosed if we get here. */
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}
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/* If it's not the cmd we're looking for, save it for later */
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if ((complete & ~CISS_ERROR_BIT) != c->busaddr) {
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if (add_sendcmd_reject(c->Request.CDB[0],
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h->ctlr, complete) != 0)
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BUG(); /* we are hosed if we get here. */
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continue;
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} else
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done = 1;
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} while (!done);
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}
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cleanup1:
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/* It is our command. If no error, we're done. */
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if (!(complete & CISS_ERROR_BIT)) {
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status = IO_OK;
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break;
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}
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/* There is an error... */
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/* if data overrun or underun on Report command ignore it */
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if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
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(c->Request.CDB[0] == CISS_REPORT_PHYS) ||
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(c->Request.CDB[0] == CISS_INQUIRY)) &&
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((c->err_info->CommandStatus == CMD_DATA_OVERRUN) ||
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(c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) {
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complete = c->busaddr;
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status = IO_OK;
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break;
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}
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if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) {
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printk(KERN_WARNING "cciss%d: unsolicited abort %p\n",
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h->ctlr, c);
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if (c->retry_count < MAX_CMD_RETRIES) {
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printk(KERN_WARNING "cciss%d: retrying %p\n",
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h->ctlr, c);
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c->retry_count++;
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/* erase the old error information */
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memset(c->err_info, 0, sizeof(c->err_info));
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goto resend_cmd1;
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}
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printk(KERN_WARNING "cciss%d: retried %p too many "
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"times\n", h->ctlr, c);
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status = IO_ERROR;
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goto cleanup1;
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}
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if (c->err_info->CommandStatus == CMD_UNABORTABLE) {
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printk(KERN_WARNING "cciss%d: command could not be "
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"aborted.\n", h->ctlr);
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status = IO_ERROR;
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goto cleanup1;
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}
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printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr);
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printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n",
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c->Request.CDB[0], c->err_info->CommandStatus);
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if (c->err_info->CommandStatus == CMD_TARGET_STATUS) {
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printk(KERN_WARNING "Target status = 0x%02x\n",
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c->err_info->ScsiStatus);
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if (c->err_info->ScsiStatus == 2) /* chk cond */
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printk(KERN_WARNING "Sense key = 0x%02x\n",
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0xf & c->err_info->SenseInfo[2]);
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}
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status = IO_ERROR;
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goto cleanup1;
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} while (1);
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cleanup1:
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/* unlock the data buffer from DMA */
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buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
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buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
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pci_unmap_single(info_p->pdev, (dma_addr_t) buff_dma_handle.val,
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pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
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c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
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#ifdef CONFIG_CISS_SCSI_TAPE
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/* if we saved some commands for later, process them now. */
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if (info_p->scsi_rejects.ncompletions > 0)
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do_cciss_intr(0, info_p);
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if (h->scsi_rejects.ncompletions > 0)
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do_cciss_intr(0, h);
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#endif
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cmd_free(info_p, c, 1);
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return status;
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}
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/*
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* Send a command to the controller, and wait for it to complete.
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* Used at init time, and during SCSI error recovery.
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*/
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static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
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unsigned int use_unit_num,/* 0: address the controller,
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1: address logical volume log_unit,
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2: periph device address is scsi3addr */
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unsigned int log_unit,
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__u8 page_code, unsigned char *scsi3addr, int cmd_type)
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{
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CommandList_struct *c;
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int status;
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c = cmd_alloc(hba[ctlr], 1);
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if (!c) {
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printk(KERN_WARNING "cciss: unable to get memory");
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return IO_ERROR;
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}
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status = fill_cmd(c, cmd, ctlr, buff, size, use_unit_num,
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log_unit, page_code, scsi3addr, cmd_type);
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if (status == IO_OK)
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status = sendcmd_core(hba[ctlr], c);
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cmd_free(hba[ctlr], c, 1);
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return status;
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}
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