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authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-13 20:35:54 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-13 20:35:54 -0800
commitd83763f4a6adb2f417c3288ee903982985ae949c (patch)
tree610a7cfd32935ce4b555dc832c26ddeb13dcd003 /include
parent9aa3d651a9199103eb6451aeb0ac1b66a6d770a6 (diff)
parent0a5149ba02bdf75281b8bc94cf6dfa94c527fa6f (diff)
Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull final round of SCSI updates from James Bottomley: "Sorry for the delay in this patch which was mostly caused by getting the merger of the mpt2/mpt3sas driver, which was seen as an essential item of maintenance work to do before the drivers diverge too much. Unfortunately, this caused a compile failure (detected by linux-next), which then had to be fixed up and incubated. In addition to the mpt2/3sas rework, there are updates from pm80xx, lpfc, bnx2fc, hpsa, ipr, aacraid, megaraid_sas, storvsc and ufs plus an assortment of changes including some year 2038 issues, a fix for a remove before detach issue in some drivers and a couple of other minor issues" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (141 commits) mpt3sas: fix inline markers on non inline function declarations sd: Clear PS bit before Mode Select. ibmvscsi: set max_lun to 32 ibmvscsi: display default value for max_id, max_lun and max_channel. mptfusion: don't allow negative bytes in kbuf_alloc_2_sgl() scsi: pmcraid: replace struct timeval with ktime_get_real_seconds() mvumi: 64bit value for seconds_since1970 be2iscsi: Fix bogus WARN_ON length check scsi_scan: don't dump trace when scsi_prep_async_scan() is called twice mpt3sas: Bump mpt3sas driver version to 09.102.00.00 mpt3sas: Single driver module which supports both SAS 2.0 & SAS 3.0 HBAs mpt2sas, mpt3sas: Update the driver versions mpt3sas: setpci reset kernel oops fix mpt3sas: Added OEM Gen2 PnP ID branding names mpt3sas: Refcount fw_events and fix unsafe list usage mpt3sas: Refcount sas_device objects and fix unsafe list usage mpt3sas: sysfs attribute to report Backup Rail Monitor Status mpt3sas: Ported WarpDrive product SSS6200 support mpt3sas: fix for driver fails EEH, recovery from injected pci bus error mpt3sas: Manage MSI-X vectors according to HBA device type ...
Diffstat (limited to 'include')
-rw-r--r--include/scsi/scsi_host.h5
-rw-r--r--include/scsi/scsi_tcq.h95
2 files changed, 20 insertions, 80 deletions
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index e113c757d555..ed527121031d 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -406,11 +406,6 @@ struct scsi_host_template {
int tag_alloc_policy;
/*
- * Let the block layer assigns tags to all commands.
- */
- unsigned use_blk_tags:1;
-
- /*
* Track QUEUE_FULL events and reduce queue depth on demand.
*/
unsigned track_queue_depth:1;
diff --git a/include/scsi/scsi_tcq.h b/include/scsi/scsi_tcq.h
index b27977e8aaed..4416b1026189 100644
--- a/include/scsi/scsi_tcq.h
+++ b/include/scsi/scsi_tcq.h
@@ -10,91 +10,36 @@
#ifdef CONFIG_BLOCK
-static inline struct scsi_cmnd *scsi_mq_find_tag(struct Scsi_Host *shost,
- int unique_tag)
-{
- u16 hwq = blk_mq_unique_tag_to_hwq(unique_tag);
- struct request *req = NULL;
-
- if (hwq < shost->tag_set.nr_hw_queues)
- req = blk_mq_tag_to_rq(shost->tag_set.tags[hwq],
- blk_mq_unique_tag_to_tag(unique_tag));
- return req ? (struct scsi_cmnd *)req->special : NULL;
-}
-
-/**
- * scsi_find_tag - find a tagged command by device
- * @SDpnt: pointer to the ScSI device
- * @tag: tag generated by blk_mq_unique_tag()
- *
- * Notes:
- * Only works with tags allocated by the generic blk layer.
- **/
-static inline struct scsi_cmnd *scsi_find_tag(struct scsi_device *sdev, int tag)
-{
- struct request *req;
-
- if (tag != SCSI_NO_TAG) {
- if (shost_use_blk_mq(sdev->host))
- return scsi_mq_find_tag(sdev->host, tag);
-
- req = blk_queue_find_tag(sdev->request_queue, tag);
- return req ? (struct scsi_cmnd *)req->special : NULL;
- }
-
- /* single command, look in space */
- return sdev->current_cmnd;
-}
-
-
-/**
- * scsi_init_shared_tag_map - create a shared tag map
- * @shost: the host to share the tag map among all devices
- * @depth: the total depth of the map
- */
-static inline int scsi_init_shared_tag_map(struct Scsi_Host *shost, int depth)
-{
- /*
- * We always have a shared tag map around when using blk-mq.
- */
- if (shost_use_blk_mq(shost))
- return 0;
-
- /*
- * If the shared tag map isn't already initialized, do it now.
- * This saves callers from having to check ->bqt when setting up
- * devices on the shared host (for libata)
- */
- if (!shost->bqt) {
- shost->bqt = blk_init_tags(depth,
- shost->hostt->tag_alloc_policy);
- if (!shost->bqt)
- return -ENOMEM;
- }
-
- return 0;
-}
-
/**
* scsi_host_find_tag - find the tagged command by host
* @shost: pointer to scsi_host
- * @tag: tag generated by blk_mq_unique_tag()
+ * @tag: tag
*
- * Notes:
- * Only works with tags allocated by the generic blk layer.
+ * Note: for devices using multiple hardware queues tag must have been
+ * generated by blk_mq_unique_tag().
**/
static inline struct scsi_cmnd *scsi_host_find_tag(struct Scsi_Host *shost,
- int tag)
+ int tag)
{
- struct request *req;
+ struct request *req = NULL;
- if (tag != SCSI_NO_TAG) {
- if (shost_use_blk_mq(shost))
- return scsi_mq_find_tag(shost, tag);
+ if (tag == SCSI_NO_TAG)
+ return NULL;
+
+ if (shost_use_blk_mq(shost)) {
+ u16 hwq = blk_mq_unique_tag_to_hwq(tag);
+
+ if (hwq < shost->tag_set.nr_hw_queues) {
+ req = blk_mq_tag_to_rq(shost->tag_set.tags[hwq],
+ blk_mq_unique_tag_to_tag(tag));
+ }
+ } else {
req = blk_map_queue_find_tag(shost->bqt, tag);
- return req ? (struct scsi_cmnd *)req->special : NULL;
}
- return NULL;
+
+ if (!req)
+ return NULL;
+ return req->special;
}
#endif /* CONFIG_BLOCK */

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