kernel.git/drivers/scsi/hosts.c, branch linux-5.0.y

Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

2018-12-28T22:48:06Z

Pull SCSI updates from James Bottomley: "This is mostly update of the usual drivers: smarpqi, lpfc, qedi, megaraid_sas, libsas, zfcp, mpt3sas, hisi_sas. Additionally, we have a pile of annotation, unused variable and minor updates. The big API change is the updates for Christoph's DMA rework which include removing the DISABLE_CLUSTERING flag. And finally there are a couple of target tree updates" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (259 commits) scsi: isci: request: mark expected switch fall-through scsi: isci: remote_node_context: mark expected switch fall-throughs scsi: isci: remote_device: Mark expected switch fall-throughs scsi: isci: phy: Mark expected switch fall-through scsi: iscsi: Capture iscsi debug messages using tracepoints scsi: myrb: Mark expected switch fall-throughs scsi: megaraid: fix out-of-bound array accesses scsi: mpt3sas: mpt3sas_scsih: Mark expected switch fall-through scsi: fcoe: remove set but not used variable 'port' scsi: smartpqi: call pqi_free_interrupts() in pqi_shutdown() scsi: smartpqi: fix build warnings scsi: smartpqi: update driver version scsi: smartpqi: add ofa support scsi: smartpqi: increase fw status register read timeout scsi: smartpqi: bump driver version scsi: smartpqi: add smp_utils support scsi: smartpqi: correct lun reset issues scsi: smartpqi: correct volume status scsi: smartpqi: do not offline disks for transient did no connect conditions scsi: smartpqi: allow for larger raid maps ...

scsi: remove the use_clustering flag

2018-12-19T04:19:21Z

The same effects can be achieved by setting the dma_boundary to PAGE_SIZE - 1 and the max_segment_size to PAGE_SIZE, so shift those settings into the drivers. Note that in many cases the setting might be bogus, but this keeps the status quo. [mkp: fix myrs and myrb] Signed-off-by: Christoph Hellwig Signed-off-by: Martin K. Petersen

scsi: introduce a max_segment_size host_template parameters

2018-12-19T04:13:12Z

This allows the host driver to indicate the maximum supported segment size in a nice an easy way, so that the driver doesn't have to worry about DMA-layer imposed limitations. Signed-off-by: Christoph Hellwig Reviewed-by: Bart Van Assche Signed-off-by: Martin K. Petersen

scsi: kill off the legacy IO path

2018-11-07T20:42:32Z

This removes the legacy (non-mq) IO path for SCSI. Cc: linux-scsi@vger.kernel.org Acked-by: Himanshu Madhani Reviewed-by: Hannes Reinecke Tested-by: Ming Lei Reviewed-by: Omar Sandoval Acked-by: Martin K. Petersen Signed-off-by: Jens Axboe

Revert "scsi: core: avoid host-wide host_busy counter for scsi_mq"

2018-08-27T17:17:00Z

This reverts commit 328728630d9f2bf14b82ca30b5e47489beefe361. There is fundamental issue in commit 328728630d9f2bf1 (scsi: core: avoid host-wide host_busy counter for scsi_mq) because SCSI's host busy counter may not be same with counter of blk-mq's inflight tags, especially in case of none io scheduler. We may switch to other approach for addressing this scsi_mq's performance issue, such as percpu counter or kind of ways, so revert this commit first for fixing this kind of issue in EH path, as reported by Jens. Cc: Omar Sandoval , Cc: "Martin K. Petersen" , Cc: James Bottomley , Cc: Christoph Hellwig , Cc: Don Brace Cc: Kashyap Desai Cc: Mike Snitzer Cc: Hannes Reinecke Cc: Laurence Oberman Cc: Bart Van Assche Cc: Jens Axboe Reported-by: Jens Axboe Signed-off-by: Ming Lei Signed-off-by: Martin K. Petersen

scsi: core: avoid host-wide host_busy counter for scsi_mq

2018-06-26T16:53:26Z

It isn't necessary to check the host depth in scsi_queue_rq() any more since it has been respected by blk-mq before calling scsi_queue_rq() via getting driver tag. Lots of LUNs may attach to same host and per-host IOPS may reach millions, so we should avoid expensive atomic operations on the host-wide counter in the IO path. This patch implements scsi_host_busy() via blk_mq_tagset_busy_iter() for reading the count of busy IOs for scsi_mq. It is observed that IOPS is increased by 15% in IO test on scsi_debug (32 LUNs, 32 submit queues, 1024 can_queue, libaio/dio) in a dual-socket system. [mkp: clarified commit message] Cc: Omar Sandoval , Cc: "Martin K. Petersen" , Cc: James Bottomley , Cc: Christoph Hellwig , Cc: Don Brace Cc: Kashyap Desai Cc: Mike Snitzer Cc: Hannes Reinecke Cc: Laurence Oberman Cc: Bart Van Assche Signed-off-by: Ming Lei Reviewed-by: Bart Van Assche Signed-off-by: Martin K. Petersen

scsi: read host_busy via scsi_host_busy()

2018-06-26T16:53:26Z

No functional change. Just introduce scsi_host_busy() and replace the direct read of scsi_host->host_busy with this new API. Cc: Omar Sandoval , Cc: "Martin K. Petersen" , Cc: James Bottomley , Cc: Christoph Hellwig , Cc: Don Brace Cc: Kashyap Desai Cc: Mike Snitzer Cc: Hannes Reinecke Cc: Laurence Oberman Cc: Bart Van Assche Signed-off-by: Ming Lei Reviewed-by: Bart Van Assche Signed-off-by: Martin K. Petersen

scsi: core: remove redundant assignment to shost->use_blk_mq

2018-04-09T20:34:41Z

The first assignment to shost->use_blk_mq is redundant as it is overwritten by the following statement. Remove this redundant code. Detected by CoverityScan, CID#1466993 ("Unused value") Signed-off-by: Colin Ian King Reviewed-by: Bart Van Assche Signed-off-by: Martin K. Petersen

Merge branch 'fixes' into misc

2018-04-04T00:38:39Z

Somewhat nasty merge due to conflicts between "33b28357dd00 scsi: qla2xxx: Fix Async GPN_FT for FCP and FC-NVMe scan" and "2b5b96473efc scsi: qla2xxx: Fix FC-NVMe LUN discovery" Merge is non-trivial and has been verified by Qlogic (Cavium) Signed-off-by: James E.J. Bottomley

scsi: remove the old scsi_module.c initialization model

2018-03-20T02:54:47Z

After more than 15 years all users of this legacy interface are finally gone. Rest in peace! Signed-off-by: Christoph Hellwig Signed-off-by: Martin K. Petersen