Since ioc->shost_recovery is set after ioc->reset_in_progress_mutex is
obtained, if concurrent resets are issued there is a short time during
which ioc->reset_in_progress_mutex is locked and ioc->shost_recovery ==
0. Avoid that this can cause trouble by unconditionally locking
ioc->shost_recovery.
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Sathya Prakash <sathya.prakash@broadcom.com>
Cc: Chaitra P B <chaitra.basappa@broadcom.com>
Cc: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This patch avoids that smatch complains about a double unlock on
ioc->transport_cmds.mutex.
Fixes: 651a013649 ("scsi: scsi_transport_sas: switch to bsg-lib for SMP passthrough")
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sathya Prakash <sathya.prakash@broadcom.com>
Cc: Chaitra P B <chaitra.basappa@broadcom.com>
Cc: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
Cc: stable@vger.kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Make _base_build_nvme_prp() easier to read by introducing a structure
to access NVMe command fields.
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Sathya Prakash <sathya.prakash@broadcom.com>
Cc: Chaitra P B <chaitra.basappa@broadcom.com>
Cc: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This patch avoids that gcc complains about switch/case fall-through
when building with W=1.
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Sathya Prakash <sathya.prakash@broadcom.com>
Cc: Chaitra P B <chaitra.basappa@broadcom.com>
Cc: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This patch does not change any functionality.
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Sathya Prakash <sathya.prakash@broadcom.com>
Cc: Chaitra P B <chaitra.basappa@broadcom.com>
Cc: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Modify the indentation such that smatch no longer complains about
inconsistent indenting.
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Sathya Prakash <sathya.prakash@broadcom.com>
Cc: Chaitra P B <chaitra.basappa@broadcom.com>
Cc: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Commit 2623c7a5f2 ("libata: add refcounting to ata_host") v4.17+ introduced
refcounting to ata_host and will increase or decrease the refcount when
adding or deleting transport ATA port.
Now the ata host for libsas is embedded in domain_device, and the ->kref
member is not initialized. Afer we add ata transport class, ata_host_get()
will be called when adding transport ATA port and a warning will be
triggered as below:
refcount_t: increment on 0; use-after-free.
WARNING: CPU: 2 PID: 103 at
lib/refcount.c:153 refcount_inc+0x40/0x48 ...... Call trace:
refcount_inc+0x40/0x48
ata_host_get+0x10/0x18
ata_tport_add+0x40/0x120
ata_sas_tport_add+0xc/0x14
sas_ata_init+0x7c/0xc8
sas_discover_domain+0x380/0x53c
process_one_work+0x12c/0x288
worker_thread+0x58/0x3f0
kthread+0xfc/0x128
ret_from_fork+0x10/0x18
And also when removing transport ATA port ata_host_put() will be called and
another similar warning will be triggered. If the refcount decreased to
zero, the ata host will be freed. But this ata host is only part of
domain_device, it cannot be freed directly.
So we have to change this embedded static ata host to a dynamically
allocated ata host and initialize the ->kref member. To use ata_host_get()
and ata_host_put() in libsas, we need to move the declaration of these
functions to the public libata.h and export them.
Fixes: b6240a4df0 ("scsi: libsas: add transport class for ATA devices")
Signed-off-by: Jason Yan <yanaijie@huawei.com>
CC: John Garry <john.garry@huawei.com>
CC: Taras Kondratiuk <takondra@cisco.com>
CC: Tejun Heo <tj@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The sbitmap and the percpu_ida perform essentially the same task,
allocating tags for commands. The sbitmap outperforms the percpu_ida as
documented here: https://lkml.org/lkml/2014/4/22/553
The sbitmap interface is a little harder to use, but being able to remove
the percpu_ida code and getting better performance justifies the additional
complexity.
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com> # f_tcm
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Introduce target_free_tag() and convert all drivers to use it.
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
ufshcd_dump_regs should use memcpy_fromio to read host registers
instead of directly accessing using memcpy. The same function is
utilized in ufs-qcom.
Elminite compilation warning
drivers/scsi/ufs/ufshcd.c:356:9: warning: incorrect type in argument 6 (different address spaces)
drivers/scsi/ufs/ufshcd.c:356:9: expected void const *buf
drivers/scsi/ufs/ufshcd.c:356:9: got void [noderef] <asn:2>*mmio_base
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
commit a45b599ad8 ("scsi: sg: allocate with __GFP_ZERO in
sg_build_indirect()") changed the call to alloc_pages to always use
__GFP_ZERO. Just above that, though, there was this:
if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
gfp_mask |= __GFP_ZERO;
And there's only one user of the gfp_mask. Just or in the __GFP_ZERO
flag at the top of the function and be done with it.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
In commit d2ba5675d8 ("[SCSI] qla2xxx: Disable local-interrupts while
polling for RISC status.") added a local_irq_disable() before invoking the
->intr_handler callback. The function, which was used in this callback, did
not disable interrupts while acquiring the spin_lock so a deadlock was
possible and this change was one possible solution.
The function in question was qla2300_intr_handler() and is using
spin_lock_irqsave() since commit 43fac4d97a ("[SCSI] qla2xxx: Resolve a
performance issue in interrupt"). I checked all other ->intr_handler
callbacks and all of them use the irqsave variant so it is safe to remove
the local_irq_save() block now.
Cc: qla2xxx-upstream@qlogic.com
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This will make subsequent refactoring easier to handle.
Note: this patch is nowhere checkpatch clean.
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
When ioremap_nocache fails, the lack of error-handling code may cause
unexpected results.
This patch adds error-handling code after calling ioremap_nocache.
Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Acked-by: Manish Rangankar <Manish.Rangankar@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Since commit 312d3e5611 ("[SCSI] libsas: remove ata_port.lock management
duties from lldds") the sas_ata_qc_issue() function unlocks the
ata_port.lock and disables interrupts before doing so. That lock is always
taken with disabled interrupts so at this point, the interrupts are already
disabled. There is no need to disable the interrupts before the unlock
operation because they are already disabled. Restoring the interrupt state
later does not change anything because they were disabled and remain
disabled. Therefore remove the operations which do not change the
behaviour.
Fixes: 312d3e5611 ("[SCSI] libsas: remove ata_port.lock management duties from lldds")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This patch adds formatting error overlay 0x41 to improve debug
capabilities.
Signed-off-by: Wen Xiong <wenxiong@linux.vnet.ibm.com>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Update CFG_1US_TIMER_TRSH and CON_CFG_DRIVER settings.
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The init is missed for hisi_sas_phy spinlock, so add it.
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Currently the driver spends much time allocating and freeing the slot DMA
buffer for command delivery/completion. To boost the performance,
pre-allocate the buffers for all IPTT. The downside of this approach is
that we are reallocating all buffer memory upfront, so hog memory which we
may not need.
However, the current method - DMA buffer pool - also caches all buffers and
does not free them until the pool is destroyed, so is not exactly efficient
either.
On top of this, since the slot DMA buffer is slightly bigger than a 4K
page, we need to allocate 2x4K pages per buffer (for 4K page kernel), which
is quite wasteful. For 64K page size this is not such an issue.
So, for the 4K page case, in order to make memory usage more efficient,
pre-allocating larger blocks of DMA memory for the buffers can be more
efficient.
To make DMA memory usage most efficient, we would choose a single
contiguous DMA memory block, but this could use up all the DMA memory in
the system (when CMA enabled and no IOMMU), or we may just not be able to
allocate a DMA buffer large enough when no CMA or IOMMU.
To decide the block size we use the LCM (least common multiple) of the
buffer size and the page size. We roundup(64) to ensure the LCM is not too
large, even though a little memory may be wasted per block.
So, with this, the total memory requirement is about is about 17MB for 4096
max IPTT.
Previously (for 4K pages case), it would be 32MB (for all slots
allocated).
With this change, the relative increase of IOPS for bs=4K read when
PAGE_SIZE=4K and PAGE_SIZE=64K is as follows:
IODEPTH 4K PAGE_SIZE 64K PAGE_SIZE
32 56% 47%
64 53% 44%
128 64% 43%
256 67% 45%
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>
In host reset, we use TMF or soft-reset to re-init device, and if success,
we will release all LLDD resources of this device. If the init fails -
maybe because the device was removed or link has not come up - then do not
release the LLDD resources, but rather rely on SCSI EH to handle the
timeout for these resources later on.
But if clear nexus ha calls host reset, which is the last effort of SCSI
EH, we should release all LLDD remain resources. Because SCSI EH will
release all tasks after clear nexus ha.
Before release, we do I_T nexus reset to try to clear target remain IOs.
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>
During reset, we don't want PHY events reported to libsas for PHYs which
were previously attached prior to reset.
So check hisi_hba->flags for HISI_SAS_RESET_BIT to filter PHY events during
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>
After soft_reset() for host reset, we should not be allowed to send
commands to the HW before the PHYs have come up and the port ids have been
refreshed.
Prior to this point, any commands cannot be successfully completed.
This exclusion is achieved by grabbing the host reset semaphore.
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>
There is a possible conflict when a device is removed and host reset occurs
concurrently.
The reason is that then the device is notified as gone, we try to clear the
ITCT, which is notified via an interrupt. The dev gone function pends on
this event with a completion, which is completed when the ITCT interrupt
occurs.
But host reset will disable all interrupts, the wait_for_completion() may
wait indefinitely.
This patch adds an semaphore to synchronise this two processes. The
semaphore is taken by the host reset as the basis of synchronising.
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>
There are many BROADCAST primitives generated by the host. We are only
interested in BROADCAST (CHANGE) primitives currently, so only process
this.
We have applied this processing for v2 hw before, and it is also needed for
v3 hw.
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>
This patch replaces the usage of dma_alloc_coherent() with the managed
version, dmam_alloc_coherent(), hereby reducing replicated code.
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>
Firmware provides drive specific target reset and task abort timeout
values. Driver needs to use these timeout values during task management
calls. If FW does not provide these values, fall back to using earlier
default timeout of 50 seconds for TM.
[mkp: clarified comment]
Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
While driver is waiting for adapter to become operational, if a kill
adapter is issued, driver can bail out from the wait loop immediately
rather than waiting for the entire 180 seconds.
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
There is a possibility that firmware on the controller was upgraded before
system was suspended. During resume, driver needs to read updated
controller properties.
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
If MR_DCMD_CTRL_GET_INFO DCMD timed out, return failure rather than doing
kill adapter.
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Updated driver version to "26.100.00.00"
Signed-off-by: Chaitra P B <chaitra.basappa@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Presently driver is using combined reply queue feature when MSI-x vectors >
8 for both SAS3 and SAS3.5 controllers. But as per MPI-spec,
1. For SAS3 controllers, driver should use combined reply queue when HBA
supports more than 8 MSI-x vectors.
2. For SAS3.5 controllers, driver should use combined reply queue when HBA
supports more than 16 MSI-x vectors.
Modified driver code to use combined reply queue for SAS3 controllers when
HBA supports > 8 MSI-x vectors and for SAS3.5 controllers when HBA supports
> 16 MSI-x vectors.
Signed-off-by: Chaitra P B <chaitra.basappa@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
When an ioctl is sent to FW, and if there is a controller reset issued
before ioctl gets completed, then in controller reset path all the pending
ioctl commands are terminated from "mpt3sas_ctl_reset_handler" function.
This will wake up the waiting ioctl commands in ioctl path and print
timeouts which are actually not timeouts.
Introduced "mpt3sas_base_check_cmd_timeout" function to check and print
whether command got timed out (or) terminated due to Host reset.
Signed-off-by: Chaitra P B <chaitra.basappa@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
While configuring of NVMe device handling, _pcie_device structure member
was accessed after its reference count is decremented/put. Hence modified
code to access member of _pcie_device structure before its reference count
is decremented/put.
Signed-off-by: Chaitra P B <chaitra.basappa@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
In _scsih_scan_finished driver should mark port_enable_cmd.status as
'command not used', instead base_cmds.status was marked as 'command not
used'. Update code to mark port_enable_cmd.status as 'command not used'.
Signed-off-by: Chaitra P B <chaitra.basappa@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Linux driver when receives Broadcast Asynchronous Event Notification (BAEN)
from the controller firmware, checks all pending I/Os at the driver level
and issues query task, abort task TMs. This is done in the driver to handle
drives which are connected with multiple initiators and undergoing target
resets. In the BAEN handling code, the I/Os issued to NVMe drives are also
handled and query task and abort task TMs are issued, which are not
necessary as there is no multi-initiator and no BAEN concept with NVMe
drives. Hence when the driver checks for pending I/Os it skips NVMe drives
at this moment.
Signed-off-by: Chaitra P B <chaitra.basappa@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This is a set of minor (and safe changes) that didn't make the initial
pull request plus some bug fixes.
Signed-off-by: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"This is a set of minor (and safe changes) that didn't make the initial
pull request plus some bug fixes"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: qla2xxx: Mask off Scope bits in retry delay
scsi: qla2xxx: Fix crash on qla2x00_mailbox_command
scsi: aic7xxx: aic79xx: fix potential null pointer dereference on ahd
scsi: mpt3sas: Add an I/O barrier
scsi: qla2xxx: Fix setting lower transfer speed if GPSC fails
scsi: hpsa: disable device during shutdown
scsi: sd_zbc: Fix sd_zbc_check_zone_size() error path
scsi: aacraid: remove bogus GFP_DMA32 specifies
This is mostly updates to the usual drivers: ufs, qedf, mpt3sas, lpfc,
xfcp, hisi_sas, cxlflash, qla2xxx. In the absence of Nic, we're also
taking target updates which are mostly minor except for the tcmu
refactor. The only real core change to worry about is the removal of
high page bouncing (in sas, storvsc and iscsi). This has been well
tested and no problems have shown up so far.
Signed-off-by: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI updates from James Bottomley:
"This is mostly updates to the usual drivers: ufs, qedf, mpt3sas, lpfc,
xfcp, hisi_sas, cxlflash, qla2xxx.
In the absence of Nic, we're also taking target updates which are
mostly minor except for the tcmu refactor.
The only real core change to worry about is the removal of high page
bouncing (in sas, storvsc and iscsi). This has been well tested and no
problems have shown up so far"
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (268 commits)
scsi: lpfc: update driver version to 12.0.0.4
scsi: lpfc: Fix port initialization failure.
scsi: lpfc: Fix 16gb hbas failing cq create.
scsi: lpfc: Fix crash in blk_mq layer when executing modprobe -r lpfc
scsi: lpfc: correct oversubscription of nvme io requests for an adapter
scsi: lpfc: Fix MDS diagnostics failure (Rx < Tx)
scsi: hisi_sas: Mark PHY as in reset for nexus reset
scsi: hisi_sas: Fix return value when get_free_slot() failed
scsi: hisi_sas: Terminate STP reject quickly for v2 hw
scsi: hisi_sas: Add v2 hw force PHY function for internal ATA command
scsi: hisi_sas: Include TMF elements in struct hisi_sas_slot
scsi: hisi_sas: Try wait commands before before controller reset
scsi: hisi_sas: Init disks after controller reset
scsi: hisi_sas: Create a scsi_host_template per HW module
scsi: hisi_sas: Reset disks when discovered
scsi: hisi_sas: Add LED feature for v3 hw
scsi: hisi_sas: Change common allocation mode of device id
scsi: hisi_sas: change slot index allocation mode
scsi: hisi_sas: Introduce hisi_sas_phy_set_linkrate()
scsi: hisi_sas: fix a typo in hisi_sas_task_prep()
...
Some newer target uses "Status Qualifier" response in a returned "Busy
Status". This new response code of 0x4001, which is "Scope" bits,
translates to "Affects all units accessible by target". Due to this new
value returned in the Scope bits, driver was using that value as timeout
value which resulted into driver waiting for 27min timeout.
This patch masks off this Scope bits so that driver does not use this
value as retry delay time.
Cc: <stable@vger.kernel.org>
Signed-off-by: Anil Gurumurthy <anil.gurumurthy@cavium.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This patch fixes a crash on qla2x00_mailbox_command caused when the driver
is on UNLOADING state and tries to call qla2x00_poll, which triggers a
NULL pointer dereference.
Signed-off-by: Rodrigo R. Galvao <rosattig@linux.vnet.ibm.com>
Signed-off-by: Mauro S. M. Rodrigues <maurosr@linux.vnet.ibm.com>
Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
If AHD_DEBUG is enabled and ahd_platform_alloc fails then ahd is set to
null and the debug printk dereferences ahd when passing it to ahd_name.
Fix this by moving the debug printk to before the call to
ahd_platform_alloc where ahd is not null at that point.
Detected by CoverityScan, CID#100296 ("Explicit null dereference")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
