| Age | Commit message (Collapse) | Author |
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When ufshcd_abort_one is racing with the completion ISR, the completed tag
of the request's mq_hctx pointer will be set to NULL by ISR. Return
success when request is completed by ISR because ufshcd_abort_one does not
need to do anything.
The racing flow is:
Thread A
ufshcd_err_handler step 1
...
ufshcd_abort_one
ufshcd_try_to_abort_task
ufshcd_cmd_inflight(true) step 3
ufshcd_mcq_req_to_hwq
blk_mq_unique_tag
rq->mq_hctx->queue_num step 5
Thread B
ufs_mtk_mcq_intr(cq complete ISR) step 2
scsi_done
...
__blk_mq_free_request
rq->mq_hctx = NULL; step 4
Below is KE back trace.
ufshcd_try_to_abort_task: cmd at tag 41 not pending in the device.
ufshcd_try_to_abort_task: cmd at tag=41 is cleared.
Aborting tag 41 / CDB 0x28 succeeded
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000194
pc : [0xffffffddd7a79bf8] blk_mq_unique_tag+0x8/0x14
lr : [0xffffffddd6155b84] ufshcd_mcq_req_to_hwq+0x1c/0x40 [ufs_mediatek_mod_ise]
do_mem_abort+0x58/0x118
el1_abort+0x3c/0x5c
el1h_64_sync_handler+0x54/0x90
el1h_64_sync+0x68/0x6c
blk_mq_unique_tag+0x8/0x14
ufshcd_err_handler+0xae4/0xfa8 [ufs_mediatek_mod_ise]
process_one_work+0x208/0x4fc
worker_thread+0x228/0x438
kthread+0x104/0x1d4
ret_from_fork+0x10/0x20
Fixes: 93e6c0e19d5b ("scsi: ufs: core: Clear cmd if abort succeeds in MCQ mode")
Suggested-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Link: https://lore.kernel.org/r/20240628070030.30929-3-peter.wang@mediatek.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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When ufshcd_clear_cmd is racing with the completion ISR, the completed tag
of the request's mq_hctx pointer will be set to NULL by the ISR. And
ufshcd_clear_cmd's call to ufshcd_mcq_req_to_hwq will get NULL pointer KE.
Return success when the request is completed by ISR because sq does not
need cleanup.
The racing flow is:
Thread A
ufshcd_err_handler step 1
ufshcd_try_to_abort_task
ufshcd_cmd_inflight(true) step 3
ufshcd_clear_cmd
...
ufshcd_mcq_req_to_hwq
blk_mq_unique_tag
rq->mq_hctx->queue_num step 5
Thread B
ufs_mtk_mcq_intr(cq complete ISR) step 2
scsi_done
...
__blk_mq_free_request
rq->mq_hctx = NULL; step 4
Below is KE back trace:
ufshcd_try_to_abort_task: cmd pending in the device. tag = 6
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000194
pc : [0xffffffd589679bf8] blk_mq_unique_tag+0x8/0x14
lr : [0xffffffd5862f95b4] ufshcd_mcq_sq_cleanup+0x6c/0x1cc [ufs_mediatek_mod_ise]
Workqueue: ufs_eh_wq_0 ufshcd_err_handler [ufs_mediatek_mod_ise]
Call trace:
dump_backtrace+0xf8/0x148
show_stack+0x18/0x24
dump_stack_lvl+0x60/0x7c
dump_stack+0x18/0x3c
mrdump_common_die+0x24c/0x398 [mrdump]
ipanic_die+0x20/0x34 [mrdump]
notify_die+0x80/0xd8
die+0x94/0x2b8
__do_kernel_fault+0x264/0x298
do_page_fault+0xa4/0x4b8
do_translation_fault+0x38/0x54
do_mem_abort+0x58/0x118
el1_abort+0x3c/0x5c
el1h_64_sync_handler+0x54/0x90
el1h_64_sync+0x68/0x6c
blk_mq_unique_tag+0x8/0x14
ufshcd_clear_cmd+0x34/0x118 [ufs_mediatek_mod_ise]
ufshcd_try_to_abort_task+0x2c8/0x5b4 [ufs_mediatek_mod_ise]
ufshcd_err_handler+0xa7c/0xfa8 [ufs_mediatek_mod_ise]
process_one_work+0x208/0x4fc
worker_thread+0x228/0x438
kthread+0x104/0x1d4
ret_from_fork+0x10/0x20
Fixes: 8d7290348992 ("scsi: ufs: mcq: Add supporting functions for MCQ abort")
Suggested-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Link: https://lore.kernel.org/r/20240628070030.30929-2-peter.wang@mediatek.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Reading the main config table occurs as a part of initialization in
pm80xx_chip_init(). Because of this it makes more sense to have it be a
part of the INIT logging.
Signed-off-by: Terrence Adams <tadamsjr@google.com>
Link: https://lore.kernel.org/r/20240627155924.2361370-3-tadamsjr@google.com
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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pm8001_phy_control() populates the enable_completion pointer with a stack
address, sends a PHY_LINK_RESET / PHY_HARD_RESET, waits 300 ms, and
returns. The problem arises when a phy control response comes late. After
300 ms the pm8001_phy_control() function returns and the passed
enable_completion stack address is no longer valid. Late phy control
response invokes complete() on a dangling enable_completion pointer which
leads to a kernel crash.
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Signed-off-by: Terrence Adams <tadamsjr@google.com>
Link: https://lore.kernel.org/r/20240627155924.2361370-2-tadamsjr@google.com
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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If host tries to remove ufshcd driver from a UFS device it would cause a
kernel panic if ufshcd_async_scan fails during ufshcd_probe_hba before
adding a SCSI host with scsi_add_host and MCQ is enabled since SCSI host
has been defered after MCQ configuration introduced by commit 0cab4023ec7b
("scsi: ufs: core: Defer adding host to SCSI if MCQ is supported").
To guarantee that SCSI host is removed only if it has been added, set the
scsi_host_added flag to true after adding a SCSI host and check whether it
is set or not before removing it.
Signed-off-by: Kyoungrul Kim <k831.kim@samsung.com>
Signed-off-by: Minwoo Im <minwoo.im@samsung.com>
Link: https://lore.kernel.org/r/20240627085104epcms2p5897a3870ea5c6416aa44f94df6c543d7@epcms2p5
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Enable suspending clk scaling on no request for Qualcomm SoC.
Signed-off-by: Ram Prakash Gupta <quic_rampraka@quicinc.com>
Link: https://lore.kernel.org/r/20240627083756.25340-3-quic_rampraka@quicinc.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Currently UFS clk scaling is getting suspended only when the clks are
scaled down. When high load is generated, a huge amount of latency is added
due to scaling up the clk and completing the request post that.
Suspending the scaling in its existing state when high load is generated
improves the random performance KPI by 28%. So suspending the scaling when
there are no requests. And the clk would be put in low scaled state when
the actual request load is low.
Make this change optional by having the check enabled using vops since for
some devices suspending without bringing the clk in low scaled state might
have impact on power consumption of the SoC.
Signed-off-by: Ram Prakash Gupta <quic_rampraka@quicinc.com>
Link: https://lore.kernel.org/r/20240627083756.25340-2-quic_rampraka@quicinc.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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The test for a possible shift overflow is not correct. Fix it by replacing
the '>' with a '>='.
Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Link: https://lore.kernel.org/r/20240627074827.13672-1-thenzl@redhat.com
Suggested-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Ranjan Kumar <ranjan.kumar@broadcom.com> says:
The controllers managed by mpi3mr driver requires system memory to
save hardware and firmware diagnostic information, this patch set
enhances the drivers to provide host memory to the controller for
diagnostic information. This patch set also provides driver changes
to push kernel messages into the diagnostic buffers reserved for the
driver, so that the information will be available as part of debug
data fetched from the controller. In addition, support for
configuring automatic diagnostic information is added in the driver.
Link: https://lore.kernel.org/r/20240626102646.14298-1-ranjan.kumar@broadcom.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Update driver version to 8.9.1.0.50
Signed-off-by: Ranjan Kumar <ranjan.kumar@broadcom.com>
Link: https://lore.kernel.org/r/20240626102646.14298-5-ranjan.kumar@broadcom.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Add interface for applications to manage the host diagnostic buffers and
update the automatic diag buffer capture triggers.
Co-developed-by: Sathya Prakash <sathya.prakash@broadcom.com>
Signed-off-by: Sathya Prakash <sathya.prakash@broadcom.com>
Signed-off-by: Ranjan Kumar <ranjan.kumar@broadcom.com>
Link: https://lore.kernel.org/r/20240626102646.14298-4-ranjan.kumar@broadcom.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Add functions to process automatic diag triggers. If a condition defined in
the triggers is met, the driver will call appropriate controller functions
to save the diagnostic information.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202405151955.BiAWI1SY-lkp@intel.com/
Co-developed-by: Sathya Prakash <sathya.prakash@broadcom.com>
Signed-off-by: Sathya Prakash <sathya.prakash@broadcom.com>
Signed-off-by: Ranjan Kumar <ranjan.kumar@broadcom.com>
Link: https://lore.kernel.org/r/20240626102646.14298-3-ranjan.kumar@broadcom.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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To be able to debug controller problems it is beneficial to allocate and
configure system/host memory buffers which can be used to capture hardware
and firmware diagnostic information.
Add functions required to allocate and post firmware and hardware
diagnostic buffers to the controller and to set up automatic diagnostic
capture triggers.
Captures will be triggered under the following circumstances:
1. Firmware is in FAULT state.
2. Admin commands time out.
3. Controller reset caused due to I/O timeout
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202405151758.7xrJz6rp-lkp@intel.com/
Co-developed-by: Sathya Prakash <sathya.prakash@broadcom.com>
Signed-off-by: Sathya Prakash <sathya.prakash@broadcom.com>
Signed-off-by: Ranjan Kumar <ranjan.kumar@broadcom.com>
Link: https://lore.kernel.org/r/20240626102646.14298-2-ranjan.kumar@broadcom.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Add PCI ID to support Intel Panther Lake, same as MTL.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20240618073158.38504-1-adrian.hunter@intel.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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With ARCH=arm64, make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/ufs/host/ufs-qcom.o
Add the missing invocation of the MODULE_DESCRIPTION() macro.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20240625-md-drivers-ufs-host-v2-1-59a56974b05a@quicinc.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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In function lpfc_xcvr_data_show, the memory allocation with kmalloc might
fail, thereby making rdp_context a null pointer. In the following context
and functions that use this pointer, there are dereferencing operations,
leading to null pointer dereference.
To fix this issue, a null pointer check should be added. If it is null,
use scnprintf to notify the user and return len.
Fixes: 479b0917e447 ("scsi: lpfc: Create a sysfs entry called lpfc_xcvr_data for transceiver info")
Signed-off-by: Huai-Yuan Liu <qq810974084@gmail.com>
Link: https://lore.kernel.org/r/20240621082545.449170-1-qq810974084@gmail.com
Reviewed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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again after probe failed
The expander phy will be treated as broadcast flutter in the next
revalidation after the exp-attached end device probe failed, as follows:
[78779.654026] sas: broadcast received: 0
[78779.654037] sas: REVALIDATING DOMAIN on port 0, pid:10
[78779.654680] sas: ex 500e004aaaaaaa1f phy05 change count has changed
[78779.662977] sas: ex 500e004aaaaaaa1f phy05 originated BROADCAST(CHANGE)
[78779.662986] sas: ex 500e004aaaaaaa1f phy05 new device attached
[78779.663079] sas: ex 500e004aaaaaaa1f phy05:U:8 attached: 500e004aaaaaaa05 (stp)
[78779.693542] hisi_sas_v3_hw 0000:b4:02.0: dev[16:5] found
[78779.701155] sas: done REVALIDATING DOMAIN on port 0, pid:10, res 0x0
[78779.707864] sas: Enter sas_scsi_recover_host busy: 0 failed: 0
...
[78835.161307] sas: --- Exit sas_scsi_recover_host: busy: 0 failed: 0 tries: 1
[78835.171344] sas: sas_probe_sata: for exp-attached device 500e004aaaaaaa05 returned -19
[78835.180879] hisi_sas_v3_hw 0000:b4:02.0: dev[16:5] is gone
[78835.187487] sas: broadcast received: 0
[78835.187504] sas: REVALIDATING DOMAIN on port 0, pid:10
[78835.188263] sas: ex 500e004aaaaaaa1f phy05 change count has changed
[78835.195870] sas: ex 500e004aaaaaaa1f phy05 originated BROADCAST(CHANGE)
[78835.195875] sas: ex 500e004aaaaaaa1f rediscovering phy05
[78835.196022] sas: ex 500e004aaaaaaa1f phy05:U:A attached: 500e004aaaaaaa05 (stp)
[78835.196026] sas: ex 500e004aaaaaaa1f phy05 broadcast flutter
[78835.197615] sas: done REVALIDATING DOMAIN on port 0, pid:10, res 0x0
The cause of the problem is that the related ex_phy's attached_sas_addr was
not cleared after the end device probe failed, so reset it.
Signed-off-by: Xingui Yang <yangxingui@huawei.com>
Link: https://lore.kernel.org/r/20240619091742.25465-1-yangxingui@huawei.com
Reviewed-by: John Garry <john.g.garry@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Target debugfs entry is removed via async_schedule() which isn't drained
when adding same name target, so failure of "Directory 'target11:0:0' with
parent 'scsi_debug' already present!" can be triggered easily.
Fix it by switching to domain async schedule, and draining it before
adding new target debugfs entry.
Cc: Wenchao Hao <haowenchao2@huawei.com>
Fixes: f084fe52c640 ("scsi: scsi_debug: Add debugfs interface to fail target reset")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Acked-by: Wenchao Hao <haowenchao22@gmail.com>
Link: https://lore.kernel.org/r/20240619013803.3008857-1-ming.lei@redhat.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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USB/UAS devices
Recently it was reported that the following USB storage devices are
unusable with Linux kernel 6.9:
* Kingston DataTraveler G2
* Garmin FR35
This is because attempting to read the IO Advice Hints Grouping mode page
causes these devices to reset. Hence do not read the IO Advice Hints
Grouping mode page from USB/UAS storage devices.
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable@vger.kernel.org
Fixes: 4f53138fffc2 ("scsi: sd: Translate data lifetime information")
Reported-by: Joao Machado <jocrismachado@gmail.com>
Closes: https://lore.kernel.org/linux-scsi/20240130214911.1863909-1-bvanassche@acm.org/T/#mf4e3410d8f210454d7e4c3d1fb5c0f41e651b85f
Tested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Bisected-by: Christian Heusel <christian@heusel.eu>
Reported-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Closes: https://lore.kernel.org/linux-scsi/CACLx9VdpUanftfPo2jVAqXdcWe8Y43MsDeZmMPooTzVaVJAh2w@mail.gmail.com/
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240613211828.2077477-3-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Prepare for skipping the IO Advice Hints Grouping mode page for USB storage
devices.
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Joao Machado <jocrismachado@gmail.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Christian Heusel <christian@heusel.eu>
Cc: stable@vger.kernel.org
Fixes: 4f53138fffc2 ("scsi: sd: Translate data lifetime information")
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240613211828.2077477-2-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Under the conditions that a device is to be reinitialized within
ufshcd_probe_hba(), the device must first be fully reset.
Resetting the device should include freeing U8 model (member of dev_info)
but does not, and this causes a memory leak. ufs_put_device_desc() is
responsible for freeing model.
unreferenced object 0xffff3f63008bee60 (size 32):
comm "kworker/u33:1", pid 60, jiffies 4294892642
hex dump (first 32 bytes):
54 48 47 4a 46 47 54 30 54 32 35 42 41 5a 5a 41 THGJFGT0T25BAZZA
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc ed7ff1a9):
[<ffffb86705f1243c>] kmemleak_alloc+0x34/0x40
[<ffffb8670511cee4>] __kmalloc_noprof+0x1e4/0x2fc
[<ffffb86705c247fc>] ufshcd_read_string_desc+0x94/0x190
[<ffffb86705c26854>] ufshcd_device_init+0x480/0xdf8
[<ffffb86705c27b68>] ufshcd_probe_hba+0x3c/0x404
[<ffffb86705c29264>] ufshcd_async_scan+0x40/0x370
[<ffffb86704f43e9c>] async_run_entry_fn+0x34/0xe0
[<ffffb86704f34638>] process_one_work+0x154/0x298
[<ffffb86704f34a74>] worker_thread+0x2f8/0x408
[<ffffb86704f3cfa4>] kthread+0x114/0x118
[<ffffb86704e955a0>] ret_from_fork+0x10/0x20
Fixes: 96a7141da332 ("scsi: ufs: core: Add support for reinitializing the UFS device")
Cc: <stable@vger.kernel.org>
Reviewed-by: Andrew Halaney <ahalaney@redhat.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Joel Slebodnick <jslebodn@redhat.com>
Link: https://lore.kernel.org/r/20240613200202.2524194-1-jslebodn@redhat.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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The comment that scsi_static_device_list would go away was added more than
18 years ago. Today, that list is still there and a large number of
additional entries have been added. This shows that this comment is
incorrect. Hence fix that comment.
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Avri Altman <Avri.Altman@wdc.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240612171522.2677600-1-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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The function mpi3mr_qcmd() of the mpi3mr driver is able to indicate to
the HBA if a read or write command directed at an ATA device should be
translated to an NCQ read/write command with the high prioiryt bit set
when the request uses the RT priority class and the user has enabled NCQ
priority through sysfs.
However, unlike the mpt3sas driver, the mpi3mr driver does not define
the sas_ncq_prio_supported and sas_ncq_prio_enable sysfs attributes, so
the ncq_prio_enable field of struct mpi3mr_sdev_priv_data is never
actually set and NCQ Priority cannot ever be used.
Fix this by defining these missing atributes to allow a user to check if
an ATA device supports NCQ priority and to enable/disable the use of NCQ
priority. To do this, lift the function scsih_ncq_prio_supp() out of the
mpt3sas driver and make it the generic SCSI SAS transport function
sas_ata_ncq_prio_supported(). Nothing in that function is hardware
specific, so this function can be used in both the mpt3sas driver and
the mpi3mr driver.
Reported-by: Scott McCoy <scott.mccoy@wdc.com>
Fixes: 023ab2a9b4ed ("scsi: mpi3mr: Add support for queue command processing")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20240611083435.92961-1-dlemoal@kernel.org
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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On x86, make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/scsi/scsi_common.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/scsi/advansys.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/scsi/BusLogic.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/scsi/aha1740.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/scsi/isci/isci.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/scsi/elx/efct.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/scsi/atp870u.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/scsi/ppa.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/scsi/imm.o
Add all missing invocations of the MODULE_DESCRIPTION() macro.
This updates all files which have a MODULE_LICENSE() but which do not have
a MODULE_DESCRIPTION(), even ones which did not produce the x86
allmodconfig warnings.
Acked-by: Finn Thain <fthain@linux-m68k.org>
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20240610-md-drivers-scsi-v3-1-055da78d66b2@quicinc.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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In ufshcd_clock_scaling_prepare(), after SCSI layer is blocked,
ufshcd_pending_cmds() is called to check whether there are pending
transactions or not. And only if there are no pending transactions can we
proceed to kickstart the clock scaling sequence.
ufshcd_pending_cmds() traverses over all SCSI devices and calls
sbitmap_weight() on their budget_map. sbitmap_weight() can be broken down
to three steps:
1. Calculate the nr outstanding bits set in the 'word' bitmap.
2. Calculate the nr outstanding bits set in the 'cleared' bitmap.
3. Subtract the result from step 1 by the result from step 2.
This can lead to a race condition as outlined below:
Assume there is one pending transaction in the request queue of one SCSI
device, say sda, and the budget token of this request is 0, the 'word' is
0x1 and the 'cleared' is 0x0.
1. When step 1 executes, it gets the result as 1.
2. Before step 2 executes, block layer tries to dispatch a new request to
sda. Since the SCSI layer is blocked, the request cannot pass through
SCSI but the block layer would do budget_get() and budget_put() to
sda's budget map regardless, so the 'word' has become 0x3 and 'cleared'
has become 0x2 (assume the new request got budget token 1).
3. When step 2 executes, it gets the result as 1.
4. When step 3 executes, it gets the result as 0, meaning there is no
pending transactions, which is wrong.
Thread A Thread B
ufshcd_pending_cmds() __blk_mq_sched_dispatch_requests()
| |
sbitmap_weight(word) |
| scsi_mq_get_budget()
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| scsi_mq_put_budget()
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sbitmap_weight(cleared)
...
When this race condition happens, the clock scaling sequence is started
with transactions still in flight, leading to subsequent hibernate enter
failure, broken link, task abort and back to back error recovery.
Fix this race condition by quiescing the request queues before calling
ufshcd_pending_cmds() so that block layer won't touch the budget map when
ufshcd_pending_cmds() is working on it. In addition, remove the SCSI layer
blocking/unblocking to reduce redundancies and latencies.
Fixes: 8d077ede48c1 ("scsi: ufs: Optimize the command queueing code")
Co-developed-by: Can Guo <quic_cang@quicinc.com>
Signed-off-by: Can Guo <quic_cang@quicinc.com>
Signed-off-by: Ziqi Chen <quic_ziqichen@quicinc.com>
Link: https://lore.kernel.org/r/1717754818-39863-1-git-send-email-quic_ziqichen@quicinc.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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For SCSI devices supporting the Command Duration Limits feature set, the
user can enable/disable this feature use through the sysfs device attribute
"cdl_enable". This attribute modification triggers a call to
scsi_cdl_enable() to enable and disable the feature for ATA devices and set
the scsi device cdl_enable field to the user provided bool value. For SCSI
devices supporting CDL, the feature set is always enabled and
scsi_cdl_enable() is reduced to setting the cdl_enable field.
However, for ATA devices, a drive may spin-up with the CDL feature enabled
by default. But the SCSI device cdl_enable field is always initialized to
false (CDL disabled), regardless of the actual device CDL feature
state. For ATA devices managed by libata (or libsas), libata-core always
disables the CDL feature set when the device is attached, thus syncing the
state of the CDL feature on the device and of the SCSI device cdl_enable
field. However, for ATA devices connected to a SAS HBA, the CDL feature is
not disabled on scan for ATA devices that have this feature enabled by
default, leading to an inconsistent state of the feature on the device with
the SCSI device cdl_enable field.
Avoid this inconsistency by adding a call to scsi_cdl_enable() in
scsi_cdl_check() to make sure that the device-side state of the CDL feature
set always matches the scsi device cdl_enable field state. This implies
that CDL will always be disabled for ATA devices connected to SAS HBAs,
which is consistent with libata/libsas initialization of the device.
Reported-by: Scott McCoy <scott.mccoy@wdc.com>
Fixes: 1b22cfb14142 ("scsi: core: Allow enabling and disabling command duration limits")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20240607012507.111488-1-dlemoal@kernel.org
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Igor Pylypiv <ipylypiv@google.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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There is a potential out-of-bounds access when using test_bit() on a single
word. The test_bit() and set_bit() functions operate on long values, and
when testing or setting a single word, they can exceed the word
boundary. KASAN detects this issue and produces a dump:
BUG: KASAN: slab-out-of-bounds in _scsih_add_device.constprop.0 (./arch/x86/include/asm/bitops.h:60 ./include/asm-generic/bitops/instrumented-atomic.h:29 drivers/scsi/mpt3sas/mpt3sas_scsih.c:7331) mpt3sas
Write of size 8 at addr ffff8881d26e3c60 by task kworker/u1536:2/2965
For full log, please look at [1].
Make the allocation at least the size of sizeof(unsigned long) so that
set_bit() and test_bit() have sufficient room for read/write operations
without overwriting unallocated memory.
[1] Link: https://lore.kernel.org/all/ZkNcALr3W3KGYYJG@gmail.com/
Fixes: c696f7b83ede ("scsi: mpt3sas: Implement device_remove_in_progress check in IOCTL path")
Cc: stable@vger.kernel.org
Suggested-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Breno Leitao <leitao@debian.org>
Link: https://lore.kernel.org/r/20240605085530.499432-1-leitao@debian.org
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Commit 321da3dc1f3c ("scsi: sd: usb_storage: uas: Access media prior
to querying device properties") triggered a read to LBA 0 before
attempting to inquire about device characteristics. This was done
because some protocol bridge devices will return generic values until
an attached storage device's media has been accessed.
Pierre Tomon reported that this change caused problems on a large
capacity external drive connected via a bridge device. The bridge in
question does not appear to implement the READ(10) command.
Issue a READ(16) instead of READ(10) when a device has been identified
as preferring 16-byte commands (use_16_for_rw heuristic).
Link: https://bugzilla.kernel.org/show_bug.cgi?id=218890
Link: https://lore.kernel.org/r/70dd7ae0-b6b1-48e1-bb59-53b7c7f18274@rowland.harvard.edu
Link: https://lore.kernel.org/r/20240605022521.3960956-1-martin.petersen@oracle.com
Fixes: 321da3dc1f3c ("scsi: sd: usb_storage: uas: Access media prior to querying device properties")
Cc: stable@vger.kernel.org
Reported-by: Pierre Tomon <pierretom+12@ik.me>
Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Pierre Tomon <pierretom+12@ik.me>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Bart Van Assche <bvanassche@acm.org> says:
Hi Martin,
There are several 32-bit ARM SCSI drivers that trigger compiler warnings
about missing function declarations. This patch series fixes these
compiler warnings by declaring local functions static. Please consider
this patch series for the next merge window.
Thanks,
Bart.
Link: https://lore.kernel.org/r/20240603172311.1587589-1-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240603172311.1587589-5-bvanassche@acm.org
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240603172311.1587589-4-bvanassche@acm.org
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240603172311.1587589-3-bvanassche@acm.org
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240603172311.1587589-2-bvanassche@acm.org
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Minwoo Im <minwoo.im@samsung.com> says:
This patchset introduces add support for MCQ introduced in UFSHCI 4.0.
The first patch adds a simple helper to get the address of MCQ queue
config registers. The second one enables MCQ feature by adding mandatory
vops callback functions required at MCQ initialization phase. The last
one is to prevent a case where number of MCQ is given 1 since driver
allocates poll_queues first rather than I/O queues to handle device
commands. Instead of causing exception handlers due to no I/O queue,
failfast during the initialization time.
Link: https://lore.kernel.org/r/20240531212244.1593535-1-minwoo.im@samsung.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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If hba_maxq equals poll_queues, which means there are no I/O queues
(HCTX_TYPE_DEFAULT, HCTX_TYPE_READ), the very first hw queue will be
allocated as HCTX_TYPE_POLL and it will be used as the dev_cmd_queue. In
this case, device commands such as QUERY cannot be properly handled.
This patch prevents the initialization of MCQ when the number of I/O queues
is not set and only the number of POLL queues is set.
Signed-off-by: Minwoo Im <minwoo.im@samsung.com>
Link: https://lore.kernel.org/r/20240531212244.1593535-3-minwoo.im@samsung.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Recently, ufs-mcq feature has been introduced to QEMU hw/ufs device [1].
This patch adds MCQ support for upstream QEMU UFS PCI controller. This
patch provides mandatory vops callbacks to make UFS controller work
properly on MCQ mode. Operation and Runtime Config register stride is
fixed to 48bytes which is implemented by qemu.
[1] https://lore.kernel.org/qemu-devel/cover.1716876237.git.jeuk20.kim@samsung.com/
Signed-off-by: Minwoo Im <minwoo.im@samsung.com>
Link: https://lore.kernel.org/r/20240531212244.1593535-2-minwoo.im@samsung.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Inline functions are preferred over macros. Convert the MCQ_CFG_n macro to
an inline function.
Signed-off-by: Minwoo Im <minwoo.im@samsung.com>
Link: https://lore.kernel.org/r/20240519221457.772346-3-minwoo.im@samsung.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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The MCQ_OPR_OFFSET_n macro takes 'hba' in the caller context without
receiving 'hba' instance as an argument. To prevent potential bugs in
future use cases, add an argument 'hba'.
Fixes: 2468da61ea09 ("scsi: ufs: core: mcq: Configure operation and runtime interface")
Cc: Asutosh Das <quic_asutoshd@quicinc.com>
Signed-off-by: Minwoo Im <minwoo.im@samsung.com>
Link: https://lore.kernel.org/r/20240519221457.772346-2-minwoo.im@samsung.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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An error unrelated to ufshcd_try_to_abort_task is being logged and can
cause confusion. Modify ufshcd_mcq_abort() to print the result of the abort
failure. For readability, return immediately instead of 'goto'.
Fixes: f1304d442077 ("scsi: ufs: mcq: Added ufshcd_mcq_abort()")
Signed-off-by: Chanwoo Lee <cw9316.lee@samsung.com>
Link: https://lore.kernel.org/r/20240524015904.1116005-1-cw9316.lee@samsung.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Avri Altman <avri.altman@wdc.com> says:
The rtt-upiu packets precede any data-out upiu packets, thus synchronizing
the data input to the device: this mostly applies to write operations, but
there are other operations that requires rtt as well.
There are several rules binding this rtt - data-out dialog, specifically
There can be at most outstanding bMaxNumOfRTT such packets. This might
have an effect on write performance (sequential write in particular), as
each data-out upiu must wait for its rtt sibling.
UFSHCI expects bMaxNumOfRTT to be min(bDeviceRTTCap, NORTT). However, as of
today, there does not appear to be no-one who sets it: not the host
controller nor the driver. It wasn't an issue up to now: bMaxNumOfRTT is
set to 2 after manufacturing, and wasn't limiting the write performance.
UFS4.0, and specifically gear 5 changes this, and requires the device to be
more attentive. This doesn't come free - the device has to allocate more
resources to that end, but the sequential write performance improvement is
significant. Early measurements shows 25% gain when moving from rtt 2 to
9. Therefore, set bMaxNumOfRTT to be min(bDeviceRTTCap, NORTT) as UFSHCI
expects.
Link: https://lore.kernel.org/r/20240530142510.734-1-avri.altman@wdc.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Given the importance of the RTT parameter, we want to be able to configure
it via sysfs. This is because UFS users should be discouraged from change
UFS device parameters without the UFSHCI driver being aware of these
changes.
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Link: https://lore.kernel.org/r/20240530142510.734-4-avri.altman@wdc.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Allow platform vendors to take precedence having their own max rtt support.
This makes sense because the host controller's nortt characteristic may
vary among vendors.
while at it, set this value for Mediatek, as requested by Peter -
https://lore.kernel.org/all/0a57d6bab739d6a10584f2baba115d00dfc9c94c.camel@mediatek.com/
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Link: https://lore.kernel.org/r/20240530142510.734-3-avri.altman@wdc.com
Reviewed-by: Peter Wang <peter.wang@mediatek.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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The rtt-upiu packets precede any data-out upiu packets, thus synchronizing
the data input to the device: this mostly applies to write operations, but
there are other operations that requires rtt as well.
There are several rules binding this rtt - data-out dialog, specifically
There can be at most outstanding bMaxNumOfRTT such packets. This might
have an effect on write performance (sequential write in particular), as
each data-out upiu must wait for its rtt sibling.
UFSHCI expects bMaxNumOfRTT to be min(bDeviceRTTCap, NORTT). However, as of
today, there does not appears to be no-one who sets it: not the host
controller nor the driver. It wasn't an issue up to now: bMaxNumOfRTT is
set to 2 after manufacturing, and wasn't limiting the write performance.
UFS4.0, and specifically gear 5 changes this, and requires the device to be
more attentive. This doesn't come free - the device has to allocate more
resources to that end, but the sequential write performance improvement is
significant. Early measurements shows 25% gain when moving from rtt 2 to
9. Therefore, set bMaxNumOfRTT to be min(bDeviceRTTCap, NORTT) as UFSHCI
expects.
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Link: https://lore.kernel.org/r/20240530142510.734-2-avri.altman@wdc.com
Reviewed-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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'scsi_dif_tuple' is unused since commit 8cb2049c7448 ("[SCSI] qla2xxx: T10
DIF - Handle uninitalized sectors.").
Remove it.
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Link: https://lore.kernel.org/r/20240528215640.91771-1-linux@treblig.org
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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When calling bsg_setup_queue() -> blk_mq_alloc_queue(), we don't pass
the dev as the queuedata, but rather manually set it afterwards. Just
pass dev to blk_mq_alloc_queue() to have automatically set.
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20240524084829.2132555-3-john.g.garry@oracle.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Tested-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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When calling scsi_alloc_sdev() -> blk_mq_alloc_queue(), we don't pass
the sdev as the queuedata, but rather manually set it afterwards. Just
pass to blk_mq_alloc_queue() to have automatically set.
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20240524084829.2132555-2-john.g.garry@oracle.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Tested-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Pull in remaining commits from 6.10/scsi-queue.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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percpu.h depends on smp.h, but doesn't include it directly because of
circular header dependency issues; percpu.h is needed in a bunch of low
level headers.
This fixes a randconfig build error on mips:
include/linux/alloc_tag.h: In function '__alloc_tag_ref_set':
include/asm-generic/percpu.h:31:40: error: implicit declaration of function 'raw_smp_processor_id' [-Werror=implicit-function-declaration]
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 24e44cc22aa3 ("mm: percpu: enable per-cpu allocation tagging")
Closes: https://lore.kernel.org/oe-kbuild-all/202405210052.DIrMXJNz-lkp@intel.com/
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools
Pull perf tool fix from Arnaldo Carvalho de Melo:
"Revert a patch causing a regression.
This made a simple 'perf record -e cycles:pp make -j199' stop working
on the Ampere ARM64 system Linus uses to test ARM64 kernels".
* tag 'perf-tools-fixes-for-v6.10-1-2024-05-26' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools:
Revert "perf parse-events: Prefer sysfs/JSON hardware events over legacy"
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