kernel.git/drivers/scsi/lpfc/lpfc_debugfs.c, branch linux-4.16.y

scsi: lpfc: Beef up stat counters for debug

2017-12-21T02:11:48Z

If log verbose in not turned on, its hard to tell when certain error paths get hit. Add stats counters and corresponding logic to debugfs/sysfs to aid understanding what paths were traversed. Signed-off-by: Dick Kennedy Signed-off-by: James Smart Reviewed-by: Hannes Reinecke Signed-off-by: Martin K. Petersen

scsi: lpfc: Adjust default value of lpfc_nvmet_mrq

2017-12-05T01:32:54Z

The current default for async hw receive queues is 1, which presents issues under heavy load as number of queues influence the available async receive buffer limits. Raise the default to the either the current hw limit (16) or the number of hw qs configured (io channel value). Revise the attribute definition for mrq to better reflect what we do for hw queues. E.g. 0 means default to optimal (# of cpus), non-zero specifies a specific limit. Before this change, mrq=0 meant target mode was disabled. As 0 now has a different meaning, rework the if tests to use the better nvmet_support check. Signed-off-by: Dick Kennedy Signed-off-by: James Smart Reviewed-by: Hannes Reinecke Signed-off-by: Martin K. Petersen

scsi: lpfc: Fix display for debugfs queInfo

2017-12-05T01:32:54Z

Display for lpfc/fnX/iDiag/queInfo isn't formatted perfectly. Corrected the format strings for the queue info debug messages. Signed-off-by: Dick Kennedy Signed-off-by: James Smart Reviewed-by: Hannes Reinecke Signed-off-by: Martin K. Petersen

scsi: lpfc: fix kzalloc-simple.cocci warnings

2017-11-03T16:26:09Z

drivers/scsi/lpfc/lpfc_debugfs.c:5460:22-29: WARNING: kzalloc should be used for phba -> nvmeio_trc, instead of kmalloc/memset drivers/scsi/lpfc/lpfc_debugfs.c:2230:20-27: WARNING: kzalloc should be used for phba -> nvmeio_trc, instead of kmalloc/memset Use kzalloc rather than kmalloc followed by memset with 0 Generated by: scripts/coccinelle/api/alloc/kzalloc-simple.cocci Signed-off-by: Vasyl Gomonovych Acked-by: James Smart Signed-off-by: Martin K. Petersen

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

2017-09-08T04:11:05Z

Pull SCSI updates from James Bottomley: "This is mostly updates of the usual suspects: lpfc, qla2xxx, hisi_sas, megaraid_sas, zfcp and a host of minor updates. The major driver change here is the elimination of the block based cciss driver in favour of the SCSI based hpsa driver (which now drives all the legacy cases cciss used to be required for). Plus a reset handler clean up and the redo of the SAS SMP handler to use bsg lib" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (279 commits) scsi: scsi-mq: Always unprepare before requeuing a request scsi: Show .retries and .jiffies_at_alloc in debugfs scsi: Improve requeuing behavior scsi: Call scsi_initialize_rq() for filesystem requests scsi: qla2xxx: Reset the logo flag, after target re-login. scsi: qla2xxx: Fix slow mem alloc behind lock scsi: qla2xxx: Clear fc4f_nvme flag scsi: qla2xxx: add missing includes for qla_isr scsi: qla2xxx: Fix an integer overflow in sysfs code scsi: aacraid: report -ENOMEM to upper layer from aac_convert_sgraw2() scsi: aacraid: get rid of one level of indentation scsi: aacraid: fix indentation errors scsi: storvsc: fix memory leak on ring buffer busy scsi: scsi_transport_sas: switch to bsg-lib for SMP passthrough scsi: smartpqi: remove the smp_handler stub scsi: hpsa: remove the smp_handler stub scsi: bsg-lib: pass the release callback through bsg_setup_queue scsi: Rework handling of scsi_device.vpd_pg8[03] scsi: Rework the code for caching Vital Product Data (VPD) scsi: rcu: Introduce rcu_swap_protected() ...

scsi: lpfc: Fix MRQ > 1 context list handling

2017-08-25T02:29:41Z

Various oops including cpu LOCKUPs were seen. For asynchronously received ius where the driver must assign exchange resources, the resources were on a single get (free) list and put list (finished, waiting to be put on get list). As all cpus are sharing the lists, an interrupt for a receive frame may have to wait for all the other cpus to place their done work onto the put list before it can acquire the lock to pull from the list. Fix by breaking the resource lists into per-cpu lists or at least more than 1 list with cpu's sharing the lists). A cpu would allocate from the free list for its own cpu, and put its done work on the its own put list - avoiding the contention. As cpu load may vary, when empty, a cpu may grab from another cpu, thereby changing resource distribution. But searching for a resource only occurs on 1 or a few cpus until a single resource can be allocated. if the condition reoccurs, it starts looking at a different cpu. Signed-off-by: Dick Kennedy Signed-off-by: James Smart Signed-off-by: Martin K. Petersen

lpfc: support nvmet_fc defer_rcv callback

2017-08-10T09:19:05Z

Currently, calls to nvmet_fc_rcv_fcp_req() always copied the FC-NVME cmd iu to a temporary buffer before returning, allowing the driver to immediately repost the buffer to the hardware. To address timing conditions on queue element structures vs async command reception, the nvmet_fc transport occasionally may need to hold on to the command iu buffer for a short period. In these cases, the nvmet_fc_rcv_fcp_req() will return a special return code (-EOVERFLOW). In these cases, the LLDD must delay until the new defer_rcv lldd callback is called before recycling the buffer back to the hw. This patch adds support for the new nvmet_fc transport defer_rcv callback and recognition of the new error code when passing commands to the transport. Signed-off-by: Dick Kennedy Signed-off-by: James Smart Signed-off-by: Christoph Hellwig

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

2017-07-06T19:10:33Z

Pull SCSI updates from James Bottomley: "This is mostly updates of the usual suspects: lpfc, qla2xxx, bnx2fc, qedf, hpsa, hisi_sas, smartpqi, cxlflash, aacraid, csiostor along with a host of minor and miscellaneous changes" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (276 commits) qla2xxx: Fix NVMe entry_type for iocb packet on BE system scsi: qla2xxx: avoid unused-function warning scsi: snic: fix a couple of spelling mistakes/typos scsi: qla2xxx: fix a bunch of typos and spelling mistakes scsi: lpfc: don't double count abort errors scsi: lpfc: spin_lock_irq() is not nestable scsi: hisi_sas: optimise DMA slot memory scsi: ibmvfc: constify dev_pm_ops structures. scsi: ibmvscsi: constify dev_pm_ops structures. scsi: cxlflash: Update debug prints in reset handlers scsi: cxlflash: Update send_tmf() parameters scsi: cxlflash: Avoid double free of character device scsi: Add STARGET_CREATED_REMOVE state to scsi_target_state scsi: ses: do not add a device to an enclosure if enclosure_add_links() fails. scsi: ufs: flush eh_work when eh_work scheduled. scsi: qla2xxx: Protect access to qpair members with qpair->qp_lock scsi: sun_esp: fix device reference leaks scsi: fnic: changing queue command to return result DID_IMM_RETRY when rport is init scsi: fnic: correct speed display and add support for 25,40 and 100G scsi: fnic: added timestamp reporting in fnic debug stats ...

Merge remote-tracking branch 'jl/locks-4.13' into work.misc-set_fs

2017-06-27T03:52:33Z

scsi: lpfc: Break up IO ctx list into a separate get and put list

2017-06-20T01:40:10Z

Since unsol rcv ISR and command cmpl ISR both access/lock this list, separate get/put lists will reduce contention. Replaced struct list_head lpfc_nvmet_ctx_list; with struct list_head lpfc_nvmet_ctx_get_list; struct list_head lpfc_nvmet_ctx_put_list; and all correpsonding locks and counters. Signed-off-by: Dick Kennedy Signed-off-by: James Smart Signed-off-by: Martin K. Petersen