scsi: hisi_sas: add some print to enhance debugging

Add some print at some places such as error info and cq of exception IO,
device found etc, and also adjust some log levels.

All this to assist debugging ability.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: hisi_sas: add RAS feature for v3 hw

We use PCIe AER to support RAS feature for v3 hw.  This driver should do
following two things to support this:

1. Enable RAS interrupts, so that errors can be reported to RAS module.

2. Realize err_handler for sas_v3_pci_driver. Then if non-fatal error is
   detected, print error source and try to recover SAS controller.

Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: hisi_sas: change ncq process for v3 hw

For v3 hw, each NCQ will return a CQ, so it is no need to acquire IPTT from
ITCT, just acquire it from IPTT field of CQ.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: hisi_sas: add an mechanism to do reset work synchronously

Sometimes it is required to know when the controller reset has completed and
also if it has completed successfully.  For such places, we call
hisi_sas_controller_reset() directly before. That may lead to multiple calls
to this function.

This patch create a per-reset structure which contains a completion structure
and status flag to know when the reset completes and also the status. It is
also in hisi_hba.wq to do reset work.

As all host reset works are done in hisi_hba.wq, we don't worry multiple calls
to hisi_sas_controller_reset().

Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: hisi_sas: modify hisi_sas_dev_gone() for reset

Do a couple of changes for when HISI_SAS_RESET_BIT is set for HBA:

 - Clearing ITCT is not necessary

 - Remove internal abort as it will fail during reset

Flag sas_dev->dev_type is kept as SAS_PHY_UNUSED.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: hisi_sas: some optimizations of host controller reset

This patch do following optimizations to host controller reset:

1. Unblock scsi requests before rescanning topology, as SCSI command need be
   used if new device is found during rescanning topology.

2. Remove drain_workqueue(hisi_hba->wq) and drain_workqueue(shost->work_q), as
   there is no need to ensure that all PHYs event are done before exiting host
   reset.

3. Improve message print level of host reset. Host reset is an important and
   very few occurrence event. We should know its progress even when not
   debugging.

Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: hisi_sas: optimise port id refresh function

Currently refreshing the PHY port id after reset is done in the rescan
topology function, which is quite late in the reset process. It could be moved
earlier in the process, as the port id can be refreshed once the PHYs become
ready.

In addition to this, we should set the hisi_sas_dev port id to 0xff (invalid
port id) if all PHYs of this port remain down for the same device.

Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: hisi_sas: relocate clearing ITCT and freeing device

In certain scenarios we may just want to clear the ITCT for a device, and not
free other resources like the SATA bitmap using in v2 hw.

To facilitate this, this patch relocates the code of clearing ITCT from
free_device() to a new hw interface clear_itct().  Then for some hw, we should
not realise free_device() if there's nothing left to do for it.

[mkp: typo]

Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: hisi_sas: fix dma_unmap_sg() parameter

For function dma_unmap_sg(), the <nents> parameter should be number of
elements in the scatterlist prior to the mapping, not after the mapping.

Fix this usage.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: hisi_sas: initialize dq spinlock before use

It is required to initialize the dq spinlock before use, which was not being
done, so fix it. This issue can be detected when CONFIG_DEBUG_SPINLOCK is
enabled.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: remove duplicate includes

These duplicate includes have been found with scripts/checkincludes.pl
but they have been removed manually to avoid removing false positives.

Signed-off-by: Pravin Shedge <pravin.shedge4linux@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Suppress gcc 7 fall-through warnings

Avoid that building with gcc 7 and W=1 triggers warnings similar to the
following:

drivers/scsi/qla2xxx/qla_isr.c:1189:27: warning: this statement may fall through [-Wimplicit-fallthrough=]

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Himanshu Madhani <himanshu.madhani@cavium.com>
Cc: Quinn Tran <quinn.tran@cavium.com>
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: fnic: add a space after %p in printf format

fnic_fcpio_icmnd_cmpl_handler() displays the value of sc with:

    FNIC_SCSI_DBG(KERN_INFO...
        "... sc = 0x%p"
        "scsi_status ..."
        ...

As the literal strings get merged, the function uses %ps instead of the
intended raw %p format. Fix this by inserting a space.

Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: documentation: add scsi_common.c to SCSI driver-api

Add exported functions from scsi_common.c to the SCSI driver API
documentation.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: core: doc. fixes to scsi_common.c

Clean up some comment typos and fix some errors in documentation.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: remove redundant check for secs < 0

The check for secs being less than zero is redundant for two reasons.
Firstly, secs is unsigned so the check is always going to be false.
Secondly, if secs was signed the proceeding calculation of secs is never
going to be negative.  Hence we can remove this redundant check and day
and secs re-adjustment.

Detected by static analysis with smatch:
arcmsr_set_iop_datetime() warn: unsigned 'secs' is never less than zero.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: bfa: convert to strlcpy/strlcat

The bfa driver has a number of real issues with string termination
that gcc-8 now points out:

drivers/scsi/bfa/bfad_bsg.c: In function 'bfad_iocmd_port_get_attr':
drivers/scsi/bfa/bfad_bsg.c:320:9: error: argument to 'sizeof' in 'strncpy' call is the same expression as the source; did you mean to use the size of the destination? [-Werror=sizeof-pointer-memaccess]
drivers/scsi/bfa/bfa_fcs.c: In function 'bfa_fcs_fabric_psymb_init':
drivers/scsi/bfa/bfa_fcs.c:775:9: error: argument to 'sizeof' in 'strncat' call is the same expression as the source; did you mean to use the size of the destination? [-Werror=sizeof-pointer-memaccess]
drivers/scsi/bfa/bfa_fcs.c:781:9: error: argument to 'sizeof' in 'strncat' call is the same expression as the source; did you mean to use the size of the destination? [-Werror=sizeof-pointer-memaccess]
drivers/scsi/bfa/bfa_fcs.c:788:9: error: argument to 'sizeof' in 'strncat' call is the same expression as the source; did you mean to use the size of the destination? [-Werror=sizeof-pointer-memaccess]
drivers/scsi/bfa/bfa_fcs.c:801:10: error: argument to 'sizeof' in 'strncat' call is the same expression as the source; did you mean to use the size of the destination? [-Werror=sizeof-pointer-memaccess]
drivers/scsi/bfa/bfa_fcs.c:808:10: error: argument to 'sizeof' in 'strncat' call is the same expression as the source; did you mean to use the size of the destination? [-Werror=sizeof-pointer-memaccess]
drivers/scsi/bfa/bfa_fcs.c: In function 'bfa_fcs_fabric_nsymb_init':
drivers/scsi/bfa/bfa_fcs.c:837:10: error: argument to 'sizeof' in 'strncat' call is the same expression as the source; did you mean to use the size of the destination? [-Werror=sizeof-pointer-memaccess]
drivers/scsi/bfa/bfa_fcs.c:844:10: error: argument to 'sizeof' in 'strncat' call is the same expression as the source; did you mean to use the size of the destination? [-Werror=sizeof-pointer-memaccess]
drivers/scsi/bfa/bfa_fcs.c:852:10: error: argument to 'sizeof' in 'strncat' call is the same expression as the source; did you mean to use the size of the destination? [-Werror=sizeof-pointer-memaccess]
drivers/scsi/bfa/bfa_fcs.c: In function 'bfa_fcs_fabric_psymb_init':
drivers/scsi/bfa/bfa_fcs.c:778:2: error: 'strncat' output may be truncated copying 10 bytes from a string of length 63 [-Werror=stringop-truncation]
drivers/scsi/bfa/bfa_fcs.c:784:2: error: 'strncat' output may be truncated copying 30 bytes from a string of length 63 [-Werror=stringop-truncation]
drivers/scsi/bfa/bfa_fcs.c:803:3: error: 'strncat' output may be truncated copying 44 bytes from a string of length 63 [-Werror=stringop-truncation]
drivers/scsi/bfa/bfa_fcs.c:811:3: error: 'strncat' output may be truncated copying 16 bytes from a string of length 63 [-Werror=stringop-truncation]
drivers/scsi/bfa/bfa_fcs.c: In function 'bfa_fcs_fabric_nsymb_init':
drivers/scsi/bfa/bfa_fcs.c:840:2: error: 'strncat' output may be truncated copying 10 bytes from a string of length 63 [-Werror=stringop-truncation]
drivers/scsi/bfa/bfa_fcs.c:847:2: error: 'strncat' output may be truncated copying 30 bytes from a string of length 63 [-Werror=stringop-truncation]
drivers/scsi/bfa/bfa_fcs_lport.c: In function 'bfa_fcs_fdmi_get_hbaattr':
drivers/scsi/bfa/bfa_fcs_lport.c:2657:10: error: argument to 'sizeof' in 'strncat' call is the same expression as the source; did you mean to use the size of the destination? [-Werror=sizeof-pointer-memaccess]
drivers/scsi/bfa/bfa_fcs_lport.c:2659:11: error: argument to 'sizeof' in 'strncat' call is the same expression as the source; did you mean to use the size of the destination? [-Werror=sizeof-pointer-memaccess]
drivers/scsi/bfa/bfa_fcs_lport.c: In function 'bfa_fcs_lport_ms_gmal_response':
drivers/scsi/bfa/bfa_fcs_lport.c:3232:5: error: 'strncpy' output may be truncated copying 16 bytes from a string of length 247 [-Werror=stringop-truncation]
drivers/scsi/bfa/bfa_fcs_lport.c: In function 'bfa_fcs_lport_ns_send_rspn_id':
drivers/scsi/bfa/bfa_fcs_lport.c:4670:3: error: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Werror=stringop-truncation]
drivers/scsi/bfa/bfa_fcs_lport.c:4682:3: error: 'strncat' output truncated before terminating nul copying as many bytes from a string as its length [-Werror=stringop-truncation]
drivers/scsi/bfa/bfa_fcs_lport.c: In function 'bfa_fcs_lport_ns_util_send_rspn_id':
drivers/scsi/bfa/bfa_fcs_lport.c:5206:3: error: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Werror=stringop-truncation]
drivers/scsi/bfa/bfa_fcs_lport.c:5215:3: error: 'strncat' output truncated before terminating nul copying as many bytes from a string as its length [-Werror=stringop-truncation]
drivers/scsi/bfa/bfa_fcs_lport.c: In function 'bfa_fcs_fdmi_get_portattr':
drivers/scsi/bfa/bfa_fcs_lport.c:2751:2: error: 'strncpy' specified bound 128 equals destination size [-Werror=stringop-truncation]
drivers/scsi/bfa/bfa_fcbuild.c: In function 'fc_rspnid_build':
drivers/scsi/bfa/bfa_fcbuild.c:1254:2: error: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Werror=stringop-truncation]
drivers/scsi/bfa/bfa_fcbuild.c:1253:25: note: length computed here
drivers/scsi/bfa/bfa_fcbuild.c: In function 'fc_rsnn_nn_build':
drivers/scsi/bfa/bfa_fcbuild.c:1275:2: error: 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length [-Werror=stringop-truncation]

In most cases, this can be addressed by correctly calling strlcpy and
strlcat instead of strncpy/strncat, with the size of the destination
buffer as the last argument.

For consistency, I'm changing the other callers of strncpy() in this
driver the same way.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Acked-by: Sudarsana Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: scsi_debug: Add support for injecting SCSI_MLQUEUE_HOST_BUSY

Although it is important to be able to trigger the code in the SCSI core
for SCSI_MLQUEUE_HOST_BUSY handling, currently it is nontrivial to
trigger that code. Hence this patch that adds a new error injection
option to the scsi_debug driver for making the .queue_rq()
implementation of this driver return SCSI_MLQUEUE_HOST_BUSY.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Douglas Gilbert <dgilbert@interlog.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: devinfo: replace "Dell PV 650F" with "EMC CLARiiON"

The Dell PV650F is a re-branded CLARiiON FC5700.  And DGC/RAID,DISK
identifies all CLARiiON family.

Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
Cc: SCSI ML <linux-scsi@vger.kernel.org>
Signed-off-by: Xose Vazquez Perez <xose.vazquez@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: dh: add new rdac devices

Add IBM 3542 and 3552, arrays: FAStT200 and FAStT500.

Add full STK OPENstorage family, arrays: 9176, D173, D178, D210, D220,
D240 and D280.

Add STK BladeCtlr family, arrays: B210, B220, B240 and B280.

These changes were done in multipath-tools time ago.

Cc: NetApp RDAC team <ng-eseries-upstream-maintainers@netapp.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Christophe Varoqui <christophe.varoqui@opensvc.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
Cc: SCSI ML <linux-scsi@vger.kernel.org>
Cc: device-mapper development <dm-devel@redhat.com>
Signed-off-by: Xose Vazquez Perez <xose.vazquez@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: devinfo: apply to HP XP the same flags as Hitachi VSP

Commit 56f3d383f37b ("scsi: scsi_devinfo: Add TRY_VPD_PAGES to HITACHI
OPEN-V blacklist entry") modified some Hitachi entries:

    HITACHI is always supporting VPD pages, even though it's claiming to
    support SCSI Revision 3 only.

The same should have been done also for HP-rebranded.

[mkp: checkpatch and tweaked commit message]

Cc: Hannes Reinecke <hare@suse.de>
Cc: Takahiro Yasui <takahiro.yasui@hds.com>
Cc: Matthias Rudolph <Matthias.Rudolph@hitachivantara.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
Cc: SCSI ML <linux-scsi@vger.kernel.org>
Signed-off-by: Xose Vazquez Perez <xose.vazquez@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: devinfo: Apply to HP-rebranded the same flags as Hitachi

Commit 627511e3e675 ("[SCSI] scsi_devinfo: update Hitachi entries (v2)")
modified some Hitachi entries:

    Four models, OPEN-/DF400/DF500/DISK-SUBSYSTEM, can handle
    REPORT_LUN, and the BLIST_REPORTLUN2 flag needs to be set. And DF600
    doesn't require any flags because it returns ANSI 03h (SPC).

The same should have been done also for HP counterparts.

[mkp: checkpatch and tweaked commit message]

Cc: Takahiro Yasui <takahiro.yasui@hds.com>
Cc: Mike Christie <michaelc@cs.wisc.edu>
Cc: Matthias Rudolph <Matthias.Rudolph@hds.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
Cc: SCSI ML <linux-scsi@vger.kernel.org>
Signed-off-by: Xose Vazquez Perez <xose.vazquez@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: pmcraid: use correct size unit when calling find_first_zero_bit()

find_first_zero_bit()'s parameter 'size' is defined in bits, not in
bytes.

Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: fusion: clean up some indentations

There are several places where the source is not indented correctly with
either too many or too few levels of intentation. Fix these.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: dh: Remove scsi_dh_remove_device()

Remove this function since it has an empty body.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: core: Unexport scsi_initialize_rq()

Commit 651a01364994 ("scsi: scsi_transport_sas: switch to bsg-lib for
SMP passthrough") removed the only call to scsi_initialize_rq() from
outside the SCSI core. Hence unexport scsi_initialize_rq().

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Update driver version to 10.00.00.03-k

Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Fix memory leak in dual/target mode

When driver is loaded in Target/Dual mode, it creates QPair to support
MQ and allocates resources for each QPair. This Qpair initialization is
delayed until the FW personality is changed to Dual/Target mode by
issuing chip reset. At the time of chip reset firmware is re-initilized
in correct personality all the QPairs are initialized by sending
MBC_INITIALIZE_MULTIQ (001Fh).

This patch fixes memory leak by adding check to issue
MBC_INITIALIZE_MULTIQ command only while deleting rsp/req queue when the
flag is set for initiator mode, and clean up QPair resources correctly
during the driver unload. This MBX does not need to be issued for
Target/Dual mode because chip reset will reset ISP.

Fixes: d65237c7f0860 ("scsi: qla2xxx: Fix mailbox failure while deleting Queue pairs")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Fix system crash in qlt_plogi_ack_unref

Fix system crash due to NULL pointer access.

qlt_plogi_ack_t and fc_port structures were not properly bound before
calling qlt_plogi_ack_unref().

RIP: 0010:qlt_plogi_ack_unref+0xa1/0x150 [qla2xxx]
Call Trace:
qla24xx_create_new_sess+0xb1/0x320 [qla2xxx]
qla2x00_do_work+0x123/0x260 [qla2xxx]
qla2x00_iocb_work_fn+0x30/0x40 [qla2xxx]
process_one_work+0x1f3/0x530
worker_thread+0x4e/0x480
kthread+0x10c/0x140

Fixes: 726b85487067d ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Remove aborting ELS IOCB call issued as part of timeout.

This fix the spinlock recursion issue seen while unloading the driver.

14 [ffff9f2e21e03db8] native_queued_spin_lock_slowpath at ffffffffad0d8802
15 [ffff9f2e21e03dc0] do_raw_spin_lock at ffffffffad0d99e4
16 [ffff9f2e21e03dd8] _raw_spin_lock_irqsave at ffffffffad652471
17 [ffff9f2e21e03e00] qla2x00_els_dcmd_iocb_timeout at ffffffffc070cd63
18 [ffff9f2e21e03e40] qla2x00_sp_timeout at ffffffffc06f06d3 [qla2xxx]
19 [ffff9f2e21e03e68] call_timer_fn at ffffffffad0f97d8
20 [ffff9f2e21e03ed8] run_timer_softirq at ffffffffad0faf47
21 [ffff9f2e21e03f68] __softirqentry_text_start at ffffffffad655f32

Fixes: 6eb54715b54bb ("qla2xxx: Added interface to send explicit LOGO.")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Giridhar Malavali <giridhar.malavali@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Defer processing of GS IOCB calls

This patch defers processing of GS IOCB calls from interrupt context to
avoid hardware spinlock recursion.

Following stack trace is seen

? mod_timer+0x193/0x330
? ql_dbg+0xa7/0xf0 [qla2xxx]
_raw_spin_lock_irqsave+0x31/0x40
qla2x00_start_sp+0x3b/0x250 [qla2xxx]
qla24xx_async_gnl+0x1d3/0x240 [qla2xxx]
qla24xx_fcport_handle_login+0x285/0x290 [qla2xxx]
? vprintk_func+0x20/0x50

Fixes: 726b85487067d ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Giridhar Malavali <giridhar.malavali@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Clear loop id after delete

Clear loop id after delete to prevent session invalidation of stale
session.

Fixes: 726b85487067d ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Fix scan state field for fcport

Add correct value of scan_state field indicating state of the FC port

Fixes: 726b85487067d ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Replace fcport alloc with qla2x00_alloc_fcport

Current code manually allocate an fcport structure that is not properly
initialize. Replace kzalloc with qla2x00_alloc_fcport, so that all
fields are initialized.  Also set set scan flag to port found

Cc: <stable@vger.kernel.org>
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Fix abort command deadlock due to spinlock

Original code acquires hardware_lock to add Abort IOCB onto driver
request queue for processing. However, abort_command() will also acquire
hardware lock to look up sp pointer before issuing abort IOCB command
resulting into a deadlock. This patch safely removes the possible
deadlock scenario by removing extra spinlock.

Fixes: 6eb54715b54bb ("qla2xxx: Added interface to send explicit LOGO.")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Fix PRLI state check

Get Port Database MBX cmd is to validate current Login state upon PRLI
completion. Current code looks at the last login state for re-validation
which was incorrect. This patch removed incorrect state check.

Fixes: 15f30a5752287 ("qla2xxx: Use IOCB interface to submit non-critical MBX.")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Fix Relogin being triggered too fast

Current driver design schedules relogin process via DPC thread every 1
second. In a large fabric, this DPC thread tries to schedule too many
jobs and might get overloaded. As a result of this processing of DPC
thread, it can schedule relogin earlier than 1 second.

Fixes: 726b85487067d ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Relogin to target port on a cable swap

If user swaps one target port for another target port for same switch
port, the new target port is not being recognized by the driver. Current
code assumes that old Target port has recovered from link down. The fix
will ask switch what is the WWPN of a specific NportID (GPNID) rather
than assuming it's the same Target port which has came back.

Fixes: 726b85487067d ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Fix NPIV host cleanup in target mode

Add check to make sure we are cleaning up global target host list only
for NPIV hosts

Fixes: bdbe24de281e2 ("scsi: qla2xxx: Cleanup NPIV host in target mode during config teardown")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Sawan Chandak <sawan.chandak@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Fix login state machine stuck at GPDB

This patch returns discovery state machine back to Login Complete.

Fixes: 726b85487067d ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Serialize GPNID for multiple RSCN

GPNID is triggered by RSCN. For multiple RSCNs of the same affected
NPORT ID, serialize the GPNID to prevent confusion.

Fixes: 726b85487067d ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Retry switch command on time out

Retry GID_PN & GPN_ID switch commands for time out case.

Fixes: 726b85487067d ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Fix re-login for Nport Handle in use

When NPort Handle is in use, driver needs to mark the handle as used and
pick another. Instead, the code clears the handle and re-pick the same
handle.

Fixes: 726b85487067d ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Skip IRQ affinity for Target QPairs

Fix co-existence between Block MQ and Target Mode. Block MQ and
initiator mode requires midlayer queue mapping to check for IRQ to be
affinitized. For target mode, it's not the case.

Fixes: 09620eeb62c41 ("scsi: qla2xxx: Add debug knob for user control workload")
Cc: <stable@vger.kernel.org> # 4.12+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Move session delete to driver work queue

Move session delete from system work queue to driver's work queue for in
time processing.

Fixes: 726b85487067d ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Fix gpnid error processing

Stop GPNID command from advancing if command has failed.

Fixes: 726b85487067d ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: qla2xxx: Fix system crash for Notify ack timeout handling

Fix NULL pointer crash due to missing timeout handling callback for
Notify Ack IOCB.

Fixes: 726b85487067d ("qla2xxx: Add framework for async fabric discovery")
Cc: <stable@vger.kernel.org> # 4.10+
Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: scsi_debug: add cdb_len parameter

While testing "sd: Micro-optimize READ / WRITE CDB encoding" patches it
was helpful to check various code paths associated with READ/WRITE 6, 10
and 16 byte cdb variants. There seems to be no user space "knobs" to
twiddle use_10_for_rw and friends in the scsi_device structure.  So add
a parameter to scsi_debug called "cdb_len" for this purpose.

[mkp: fixed typo]

Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: core: Introduce scsi_devinfo_key enumeration type

Since symbolic names for the device information keys alread exist,
associate an enumeration type with these symbolic values. This change
makes it clear what the valid values for the 'key' arguments are.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: core: scsi_get_device_flags_keyed(): Always return device flags

Since scsi_get_device_flags_keyed() callers do not check whether or not
the returned value is an error code, change that function such that it
returns a flags value even if the 'key' argument is invalid.  Note:
since commit 28a0bc4120d3 ("scsi: sd: Implement blacklist option for
WRITE SAME w/ UNMAP") bit 31 is a valid device information flag so
checking whether bit 31 is set in the return value is not sufficient to
tell the difference between an error code and a flags value.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: core: Convert a source code comment into a runtime check

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: core: Ensure that the SCSI error handler gets woken up

If scsi_eh_scmd_add() is called concurrently with
scsi_host_queue_ready() while shost->host_blocked > 0 then it can
happen that neither function wakes up the SCSI error handler. Fix
this by making every function that decreases the host_busy counter
wake up the error handler if necessary and by protecting the
host_failed checks with the SCSI host lock.

Reported-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
References: https://marc.info/?l=linux-kernel&m=150461610630736
Fixes: commit 746650160866 ("scsi: convert host_busy to atomic_t")
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
Tested-by: Stuart Hayes <stuart.w.hayes@gmail.com>
Cc: Konstantin Khorenko <khorenko@virtuozzo.com>
Cc: Stuart Hayes <stuart.w.hayes@gmail.com>
Cc: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

rcu: Export init_rcu_head() and destroy_rcu_head() to GPL modules

Use of init_rcu_head() and destroy_rcu_head() from modules results in
the following build-time error with CONFIG_DEBUG_OBJECTS_RCU_HEAD=y:

ERROR: "init_rcu_head" [drivers/scsi/scsi_mod.ko] undefined!
ERROR: "destroy_rcu_head" [drivers/scsi/scsi_mod.ko] undefined!

This commit therefore adds EXPORT_SYMBOL_GPL() for each to allow them to
be used by GPL-licensed kernel modules.

Reported-by: Bart Van Assche <Bart.VanAssche@wdc.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: Fix command result for CHECK_CONDITION

Fix report command result error when CHECK_CONDITION.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: Update driver version to v1.40.00.04-20171130

Update driver version to v1.40.00.04-20171130

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: Add driver module parameter msix_enable

Add module parameter msix_enable so user has the option of disabling
MSI-X interrupts if there is a platform problem.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: Add driver module parameter msi_enable

Add module parameter msi_enable so user has the option of disabling MSI
interrupts if there is a platform problem.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: Fix grammar

Fix grammar.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: Adjust whitespace

Adjust tabs and whitespace.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: Spin off duplicate code

Spin off duplicate code of timer init for message isr BH in arcmsr_probe
and arcmsr_resume as a function arcmsr_init_get_devmap_timer.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: Fix clear doorbell queue on ACB_ADAPTER_TYPE_B

Fix clear doorbell queue on ACB_ADAPTER_TYPE_B controller.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: Add a function to set date and time to firmware

Add a function arcmsr_set_iop_datetime and driver option set_date_time
to set date and time to firmware.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: Add ACB_F_MSG_GET_CONFIG to acb->acb_flags

Add ACB_F_MSG_GET_CONFIG to acb->acb_flags for for message interrupt
checking before schedule work for get device map.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: Add driver option cmd_per_lun

Add driver option cmd_per_lun to set host->cmd_per_lun value by user.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: Replace constant ARCMSR_MAX_OUTSTANDING_CMD

Replace constant ARCMSR_MAX_OUTSTANDING_CMD by variable
acb->maxOutstanding that was determined by user.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: Add driver option host_can_queue

Add driver option host_can_queue to set host->can_queue value by
user. It's value expands up to 1024.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: replace constant ARCMSR_MAX_FREECCB_NUM

Replace constant ARCMSR_MAX_FREECCB_NUM by variable acb->maxFreeCCB that
was received from firmware.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: Increase host controller command queue depth

Update ARCMSR_MAX_OUTSTANDING_CMD and ARCMSR_MAX_FREECCB_NUM to 1024.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: Add code for ACB_ADAPTER_TYPE_E

Add code for ACB_ADAPTER_TYPE_E to support new adapter ARC-1884.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: simplify arcmsr_iop_init function

Simplify arcmsr_iop_init function.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: arcmsr: Redefine ACB_ADAPTER_TYPE_A, _B, _C, _D

Redefine ACB_ADAPTER_TYPE_A, _B, _C, _D and subsequent changes.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: ibmvscsis: add DRC indices to debug statements

Where applicable, changes pr_debug, pr_info, pr_err, etc. calls to the
dev_* versions.  This adds the DRC index of the device to the
corresponding trace statement.

Signed-off-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com>
Signed-off-by: Brad Warrum <bwarrum@us.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: ipr: fix incorrect indentation of assignment statement

Remove one extraneous level of indentation on an assignment statement.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: csiostor: fix spelling mistake: "Couldnt" -> "Couldn't"

Trivial fix to spelling mistake in error message text.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: bnx2fc: fix spelling mistake: "Couldnt" -> "Couldn't"

Trivial fix to spelling mistake in error message text.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: sd: add missing KERN_CONT for disk spin-up

KERN_CONT is now required for continued printks(). Add it.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: ufs: add some definitions included in UFS HCI specification

These would be used in the future in some specific drivers.

Signed-off-by: Kiwoong Kim <kwmad.kim@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: mpt3sas: Remove unused variable requeue_event

No Functional change just cleanup. Removed variable requeue_event and
made function as void.

Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: mpt3sas: Replace PCI pool old API

The PCI pool API is deprecated. This commit replaces the PCI pool old
API by the appropriate function with the DMA pool API.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: fnic: Fix coccinelle warnings

Remove the duplicate copies of this simple function and use an
open-coded version.

drivers/scsi/fnic/fnic_debugfs.c:122:11-31: WARNING opportunity for simple_open, see also structure on line 223

Generated by: coccinelle/api/simple_open.cocci

Signed-off-by: Vasyl Gomonovych <gomonovych@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: ses: don't ask for diagnostic pages repeatedly during probe

We are testing if there is a match with the ses device in a loop by
calling ses_match_to_enclosure(), which will issue scsi receive
diagnostics commands to the ses device for every device on the same
host.  On one of our boxes with 840 disks, it takes a long time to load
the driver:

[root@g1b-oss06 ~]# time modprobe ses

real 40m48.247s
user 0m0.001s
sys 0m0.196s

With the patch:

[root@g1b-oss06 ~]# time modprobe ses

real 0m17.915s
user 0m0.008s
sys 0m0.053s

Note that we still need to refresh page 10 when we see a new disk to
create the link.

Signed-off-by: Li Dongyang <dongyang.li@anu.edu.au>
Tested-by: Jason Ozolins <jason.ozolins@hpe.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: wd719x: make card_types static const, shrinks object size

Don't populate the read-only array card_types on the stack but instead
make it static and constify it. Makes the object code smaller by over
110 bytes:

Before:
   text    data     bss     dec     hex filename
  25625    5752       0   31377    7a91 drivers/scsi/wd719x.o

After:
   text    data     bss     dec     hex filename
  25447    5816       0   31263    7a1f drivers/scsi/wd719x.o

(gcc version 7.2.0 x86_64)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: scsi_debug: remove jiffies_to_timespec

There is no need to go through an intermediate timespec to convert to
ktime_t when we just want a simple multiplication. This gets rid of one
of the few users of jiffies_to_timespec, which I hope to remove as part
of the y2038 cleanup.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: hpsa: remove an unnecessary NULL check

device->scsi3addr[] is an array, not a pointer, so it can't be NULL.
I've removed the check.

[mkp: fixed typo]

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: update driver version to 11.4.0.5

Update the driver version to 11.4.0.5

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: small sg cnt cleanup

The logic for sg_seg_cnt is a bit convoluted. This patch tries to clean
up a couple of areas, especially around the +2 and +1 logic.

This patch:

- Cleans up the lpfc_sg_seg_cnt attribute to specify a real minimum
  rather than making the minimum be whatever the default is.

- Removes the hardcoding of +2 (for the number of elements we use in a
  sgl for cmd iu and rsp iu) and +1 (an additional entry to compensate
  for nvme's reduction of io size based on a possible partial page)
  logic in sg list initialization. In the case where the +1 logic is
  referenced in host and target io checks, use the values set in the
  transport template as that value was properly set.

There can certainly be more done in this area and it will be addressed
in combined host/target driver effort.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Fix driver handling of nvme resources during unload

During driver unload, the driver may crash due to NULL pointers.  The
NULL pointers were due to the driver not protecting itself sufficiently
during some of the teardown paths.  Additionally, the driver was not
waiting for and cleanup up nvme io resources. As such, the driver wasn't
making the callbacks to the transport, stalling the transports
association teardown.

This patch waits for io clean up before tearding down and adds checks
for possible NULL pointers.

Cc: <stable@vger.kernel.org> # 4.12+
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Fix crash during driver unload with running nvme traffic

When the driver is unloading, the nvme transport could be in the process
of submitting new requests, will send abort requests to terminate
associations, or may make LS-related requests.  The driver's abort and
request entry points currently is ignorant of the unloading state and is
starting the requests even though the infrastructure to complete them
continues to teardown.

Change the entry points for new requests to check whether unloading and
if so, reject the requests. Abort routines check unloading, and if so,
noop the request. An abort is noop'd as the teardown paths are already
aborting/terminating the io outstanding at the time the teardown
initiated.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Correct driver deregistrations with host nvme transport

The driver's interaction with the host nvme transport has been incorrect
for a while. The driver did not wait for the unregister callbacks
(waited only 5 jiffies). Thus the driver may remove objects that may be
referenced by subsequent abort commands from the transport, and the
actual unregister callback was effectively a noop. This was especially
problematic if the driver was unloaded.

The driver now waits for the unregister callbacks, as it should, before
continuing with teardown.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: correct port registrations with nvme_fc

The driver currently registers any remote port that has NVME support.
It should only be registering target ports.

Register only target ports.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Linux LPFC driver does not process all RSCNs

During RSCN storms, the driver does not rediscover some targets.  The
driver marks some RSCN as to be handled after the ones it's working
on. The driver missed processing some deferred RSCN.

Move where the driver checks for deferred RSCNs and initiate deferred
RSCN handling if the flag was set. Also revise nport state within the
RSCN confirm routine. Add some state data to a possible debug print to
aid future debugging.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Fix ndlp ref count for pt2pt mode issue RSCN

pt2pt ndlp ref count prematurely goes to 0. There was reference removed
that should only be removed if connected to a switch, not if in
point-to-point mode.

Add a mode check before the reference remove.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Adjust default value of lpfc_nvmet_mrq

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 <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Fix display for debugfs queInfo

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 <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Driver fails to detect direct attach storage array

The driver does not respond to PLOGI from the direct attach target.  The
driver uses incorrect S_ID in CONFIG_LINK, after FLOGI completion

Correct by issuing CONFIG_LINK with the correct S_ID after receiving the
PLOGI from the target

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Raise maximum NVME sg list size for 256 elements

Raise the maximum NVME sg list size allowed to 256 elements.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Fix NVME LS abort_xri

Performing an LS abort results in the following message being seen:
  0603 Invalid CQ subtype 6: 00000300 22000002 ffff0016 d0050000
and the associated exchange is not properly freed.

The code did not recognize the exchange type that was aborted, thus it
was not properly handled.

Correct by adding the NVME LS ELS type to the exchange types that are
recognized.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Fix crash after bad bar setup on driver attachment

In test cases where an instance of the driver is detached and
reattached, the driver will crash on reattachment. There is a compound
if statement that will skip over the bar setup if the pci_resource_start
call is not successful. The driver erroneously returns success to its
bar setup in this scenario even though the bars aren't properly
configured.

Rework the offending code segment for proper initialization steps.  If
the pci_resource_start call fails, -ENOMEM is now returned.

Sample stack:

rport-5:0-10: blocked FC remote port time out: removing rport
BUG: unable to handle kernel NULL pointer dereference at           (null)
... lpfc_sli4_wait_bmbx_ready+0x32/0x70 [lpfc]
...
...  RIP: 0010:...  ... lpfc_sli4_wait_bmbx_ready+0x32/0x70 [lpfc]
 Call Trace:
  ... lpfc_sli4_post_sync_mbox+0x106/0x4d0 [lpfc]
  ... ? __alloc_pages_nodemask+0x176/0x420
  ... ? __kmalloc+0x2e/0x230
  ... lpfc_sli_issue_mbox_s4+0x533/0x720 [lpfc]
  ... ? mempool_alloc+0x69/0x170
  ... ? dma_generic_alloc_coherent+0x8f/0x140
  ... lpfc_sli_issue_mbox+0xf/0x20 [lpfc]
  ... lpfc_sli4_driver_resource_setup+0xa6f/0x1130 [lpfc]
  ... ? lpfc_pci_probe_one+0x23e/0x16f0 [lpfc]
  ... lpfc_pci_probe_one+0x445/0x16f0 [lpfc]
  ... local_pci_probe+0x45/0xa0
  ... work_for_cpu_fn+0x14/0x20
  ... process_one_work+0x17a/0x440

Cc: <stable@vger.kernel.org> # 4.12+
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Handle XRI_ABORTED_CQE in soft IRQ

XRI_ABORTED_CQE completions were not being handled in the fast path.
They were being queued and deferred to the lpfc worker thread for
processing. This is an artifact of the driver design prior to moving
queue processing out of the isr and into a workq element. Now that queue
processing is already in a deferred context, remove this artifact and
process them directly.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

scsi: lpfc: Expand WQE capability of every NVME hardware queue

Hardware queues are a fast staging area to push commands into the
adapter.  The adapter should drain them extremely quickly. However,
under heavy io load, the host cpu is pushing commands faster than the
drain rate of the adapter causing the driver to resource busy commands.

Enlarge the hardware queue (wq & cq) to support a larger number of queue
entries (4x the prior size) before backpressure. Enlarging the queue
requires larger contiguous buffers (16k) per logical page for the
hardware. This changed calling sequences that were expecting 4K page
sizes that now must pass a parameter with the page sizes. It also
required use of a new version of an adapter command that can vary the
page size values.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>