*
* 1: nothing (match completion)
*
- * 2: log opcode + command of all commands
+ * 2: log opcode + command of all commands + cmd address
*
- * 3: same as 2 plus dump cmd address
+ * 3: same as 2
*
* 4: same as 3 plus dump extra junk
*/
level = SCSI_LOG_LEVEL(SCSI_LOG_MLQUEUE_SHIFT,
SCSI_LOG_MLQUEUE_BITS);
if (level > 1) {
- scmd_printk(KERN_INFO, cmd, "Send: ");
- if (level > 2)
- printk("0x%p ", cmd);
- printk("\n");
+ scmd_printk(KERN_INFO, cmd,
+ "Send: scmd 0x%p\n", cmd);
scsi_print_command(cmd);
if (level > 3) {
printk(KERN_INFO "buffer = 0x%p, bufflen = %d,"
*
* 2: same as 1 but for all command completions.
*
- * 3: same as 2 plus dump cmd address
+ * 3: same as 2
*
* 4: same as 3 plus dump extra junk
*/
SCSI_LOG_MLCOMPLETE_BITS);
if (((level > 0) && (cmd->result || disposition != SUCCESS)) ||
(level > 1)) {
- scmd_printk(KERN_INFO, cmd, "Done: ");
- if (level > 2)
- printk("0x%p ", cmd);
- /*
- * Dump truncated values, so we usually fit within
- * 80 chars.
- */
- switch (disposition) {
- case SUCCESS:
- printk("SUCCESS\n");
- break;
- case NEEDS_RETRY:
- printk("RETRY\n");
- break;
- case ADD_TO_MLQUEUE:
- printk("MLQUEUE\n");
- break;
- case FAILED:
- printk("FAILED\n");
- break;
- case TIMEOUT_ERROR:
- /*
- * If called via scsi_times_out.
- */
- printk("TIMEOUT\n");
- break;
- default:
- printk("UNKNOWN\n");
- }
- scsi_print_result(cmd);
+ scsi_print_result(cmd, "Done: ", disposition);
scsi_print_command(cmd);
if (status_byte(cmd->result) & CHECK_CONDITION)
- scsi_print_sense("", cmd);
+ scsi_print_sense(cmd);
if (level > 3)
scmd_printk(KERN_INFO, cmd,
"scsi host busy %d failed %d\n",
}
EXPORT_SYMBOL(scsi_cmd_get_serial);
-/**
- * scsi_dispatch_command - Dispatch a command to the low-level driver.
- * @cmd: command block we are dispatching.
- *
- * Return: nonzero return request was rejected and device's queue needs to be
- * plugged.
- */
-int scsi_dispatch_cmd(struct scsi_cmnd *cmd)
-{
- struct Scsi_Host *host = cmd->device->host;
- int rtn = 0;
-
- atomic_inc(&cmd->device->iorequest_cnt);
-
- /* check if the device is still usable */
- if (unlikely(cmd->device->sdev_state == SDEV_DEL)) {
- /* in SDEV_DEL we error all commands. DID_NO_CONNECT
- * returns an immediate error upwards, and signals
- * that the device is no longer present */
- cmd->result = DID_NO_CONNECT << 16;
- goto done;
- }
-
- /* Check to see if the scsi lld made this device blocked. */
- if (unlikely(scsi_device_blocked(cmd->device))) {
- /*
- * in blocked state, the command is just put back on
- * the device queue. The suspend state has already
- * blocked the queue so future requests should not
- * occur until the device transitions out of the
- * suspend state.
- */
- SCSI_LOG_MLQUEUE(3, scmd_printk(KERN_INFO, cmd,
- "queuecommand : device blocked\n"));
- return SCSI_MLQUEUE_DEVICE_BUSY;
- }
-
- /* Store the LUN value in cmnd, if needed. */
- if (cmd->device->lun_in_cdb)
- cmd->cmnd[1] = (cmd->cmnd[1] & 0x1f) |
- (cmd->device->lun << 5 & 0xe0);
-
- scsi_log_send(cmd);
-
- /*
- * Before we queue this command, check if the command
- * length exceeds what the host adapter can handle.
- */
- if (cmd->cmd_len > cmd->device->host->max_cmd_len) {
- SCSI_LOG_MLQUEUE(3, scmd_printk(KERN_INFO, cmd,
- "queuecommand : command too long. "
- "cdb_size=%d host->max_cmd_len=%d\n",
- cmd->cmd_len, cmd->device->host->max_cmd_len));
- cmd->result = (DID_ABORT << 16);
- goto done;
- }
-
- if (unlikely(host->shost_state == SHOST_DEL)) {
- cmd->result = (DID_NO_CONNECT << 16);
- goto done;
-
- }
-
- trace_scsi_dispatch_cmd_start(cmd);
- rtn = host->hostt->queuecommand(host, cmd);
- if (rtn) {
- trace_scsi_dispatch_cmd_error(cmd, rtn);
- if (rtn != SCSI_MLQUEUE_DEVICE_BUSY &&
- rtn != SCSI_MLQUEUE_TARGET_BUSY)
- rtn = SCSI_MLQUEUE_HOST_BUSY;
-
- SCSI_LOG_MLQUEUE(3, scmd_printk(KERN_INFO, cmd,
- "queuecommand : request rejected\n"));
- }
-
- return rtn;
- done:
- cmd->scsi_done(cmd);
- return 0;
-}
-
/**
* scsi_finish_command - cleanup and pass command back to upper layer
* @cmd: the command
}
/**
- * scsi_adjust_queue_depth - Let low level drivers change a device's queue depth
+ * scsi_change_queue_depth - change a device's queue depth
* @sdev: SCSI Device in question
- * @tagged: Do we use tagged queueing (non-0) or do we treat
- * this device as an untagged device (0)
- * @tags: Number of tags allowed if tagged queueing enabled,
- * or number of commands the low level driver can
- * queue up in non-tagged mode (as per cmd_per_lun).
- *
- * Returns: Nothing
+ * @depth: number of commands allowed to be queued to the driver
*
- * Lock Status: None held on entry
- *
- * Notes: Low level drivers may call this at any time and we will do
- * the right thing depending on whether or not the device is
- * currently active and whether or not it even has the
- * command blocks built yet.
+ * Sets the device queue depth and returns the new value.
*/
-void scsi_adjust_queue_depth(struct scsi_device *sdev, int tagged, int tags)
+int scsi_change_queue_depth(struct scsi_device *sdev, int depth)
{
unsigned long flags;
- /*
- * refuse to set tagged depth to an unworkable size
- */
- if (tags <= 0)
- return;
+ if (depth <= 0)
+ goto out;
spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
*/
if (!shost_use_blk_mq(sdev->host) && !sdev->host->bqt) {
if (blk_queue_tagged(sdev->request_queue) &&
- blk_queue_resize_tags(sdev->request_queue, tags) != 0)
- goto out;
+ blk_queue_resize_tags(sdev->request_queue, depth) != 0)
+ goto out_unlock;
}
- sdev->queue_depth = tags;
- switch (tagged) {
- case 0:
- sdev->ordered_tags = 0;
- sdev->simple_tags = 0;
- break;
- case MSG_ORDERED_TAG:
- sdev->ordered_tags = 1;
- sdev->simple_tags = 1;
- break;
- case MSG_SIMPLE_TAG:
- sdev->ordered_tags = 0;
- sdev->simple_tags = 1;
- break;
- default:
- sdev->ordered_tags = 0;
- sdev->simple_tags = 0;
- sdev_printk(KERN_WARNING, sdev,
- "scsi_adjust_queue_depth, bad queue type, "
- "disabled\n");
- }
- out:
+ sdev->queue_depth = depth;
+out_unlock:
spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags);
+out:
+ return sdev->queue_depth;
}
-EXPORT_SYMBOL(scsi_adjust_queue_depth);
+EXPORT_SYMBOL(scsi_change_queue_depth);
/**
* scsi_track_queue_full - track QUEUE_FULL events to adjust queue depth
return 0;
if (sdev->last_queue_full_depth < 8) {
/* Drop back to untagged */
- scsi_adjust_queue_depth(sdev, 0, sdev->host->cmd_per_lun);
+ scsi_set_tag_type(sdev, 0);
+ scsi_change_queue_depth(sdev, sdev->host->cmd_per_lun);
return -1;
}
-
- if (sdev->ordered_tags)
- scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, depth);
- else
- scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
- return depth;
+
+ return scsi_change_queue_depth(sdev, depth);
}
EXPORT_SYMBOL(scsi_track_queue_full);
+/**
+ * scsi_change_queue_type() - Change a device's queue type
+ * @sdev: The SCSI device whose queue depth is to change
+ * @tag_type: Identifier for queue type
+ */
+int scsi_change_queue_type(struct scsi_device *sdev, int tag_type)
+{
+ if (!sdev->tagged_supported)
+ return 0;
+
+ scsi_set_tag_type(sdev, tag_type);
+ return tag_type;
+
+}
+EXPORT_SYMBOL(scsi_change_queue_type);
+
/**
* scsi_vpd_inquiry - Request a device provide us with a VPD page
* @sdev: The device to ask
projects / cascardo / linux.git / blobdiff