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2020-01-02scsi: ufs: Make ufshcd_prepare_utp_scsi_cmd_upiu() easier to readBart Van Assche1-4/+4
Since the lrbp->cmd expression occurs multiple times, introduce a new local variable to hold that pointer. This patch does not change any functionality. Cc: Bean Huo <beanhuo@micron.com> Cc: Can Guo <cang@codeaurora.org> Cc: Avri Altman <avri.altman@wdc.com> Cc: Stanley Chu <stanley.chu@mediatek.com> Cc: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20191224220248.30138-4-bvanassche@acm.org Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Reviewed-by: Can Guo <cang@codeaurora.org> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-01-02scsi: ufs: Make ufshcd_add_command_trace() easier to readBart Van Assche1-6/+6
Since the lrbp->cmd expression occurs multiple times, introduce a new local variable to hold that pointer. This patch does not change any functionality. Cc: Bean Huo <beanhuo@micron.com> Cc: Can Guo <cang@codeaurora.org> Cc: Avri Altman <avri.altman@wdc.com> Cc: Stanley Chu <stanley.chu@mediatek.com> Cc: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20191224220248.30138-3-bvanassche@acm.org Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Reviewed-by: Can Guo <cang@codeaurora.org> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-01-02scsi: ufs: Fix indentation in ufshcd_query_attr_retry()Bart Van Assche1-1/+1
Remove a space that occurs after a tab. Cc: Bean Huo <beanhuo@micron.com> Cc: Can Guo <cang@codeaurora.org> Cc: Avri Altman <avri.altman@wdc.com> Cc: Stanley Chu <stanley.chu@mediatek.com> Cc: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20191224220248.30138-2-bvanassche@acm.org Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Reviewed-by: Can Guo <cang@codeaurora.org> Reviewed-by: Alim Akhar <alim.akhtar@samsung.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-01-02scsi: ufs: use ufshcd_vops_dbg_register_dump for vendor specific dumpsStanley Chu1-2/+1
We already have ufshcd_vops_dbg_register_dump() thus all "hba->vops->dbg_register_dump" references can be replaced by it. Link: https://lore.kernel.org/r/1577192466-20762-3-git-send-email-stanley.chu@mediatek.com Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Can Guo <cang@codeaurora.org> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-01-02scsi: ufs: unify scsi_block_requests usageStanley Chu1-2/+2
Currently UFS driver has ufshcd_scsi_block_requests() with reference counter mechanism to avoid possible racing of blocking and unblocking requests flow. Unify all users in UFS driver to use the same function. Link: https://lore.kernel.org/r/1577192466-20762-2-git-send-email-stanley.chu@mediatek.com Reviewed-by: Can Guo <cang@codeaurora.org> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-19scsi: ufs: Power off hook for Cadence UFS driverSheeba B1-0/+1
Attach power off hook to Cadence UFS driver. Link: https://lore.kernel.org/r/1576491432-631-1-git-send-email-sheebab@cadence.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Sheeba B <sheebab@cadence.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-19scsi: ufs: disable interrupt during clock-gatingStanley Chu1-0/+4
Similar to suspend, ufshcd interrupt can be disabled since there won't be any host controller transaction expected till clocks ungated. Link: https://lore.kernel.org/r/1575721321-8071-3-git-send-email-stanley.chu@mediatek.com Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-19scsi: ufs: disable irq before disabling clocksStanley Chu1-5/+6
During suspend flow, interrupt shall be disabled before disabling clocks to avoid potential system hang due to accessing host registers after host clocks are disabled. For example, if an interrupt comes with IRQF_IRQPOLL flag configured with the misrouted interrupt recovery feature enabled, ufshcd ISR may be triggered even if nothing shall be done for UFS. In this case, system hang may happen if UFS interrupt status register is accessed with host clocks disabled. Link: https://lore.kernel.org/r/1575721321-8071-2-git-send-email-stanley.chu@mediatek.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-19scsi: ufs: Simplify a conditionDan Carpenter1-2/+1
We know that "check_for_bkops" is non-zero on this side of the || because it was checked on the other side. Link: https://lore.kernel.org/r/20191213104935.wgpq2epaz6zh5zus@kili.mountain Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-19scsi: ufs: Unlock on a couple error pathsDan Carpenter1-4/+10
We introduced a few new error paths, but we can't return directly, we first have to unlock "hba->clk_scaling_lock" first. Fixes: a276c19e3e98 ("scsi: ufs: Avoid busy-waiting by eliminating tag conflicts") Link: https://lore.kernel.org/r/20191213104828.7i64cpoof26rc4fw@kili.mountain Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-19scsi: ufs: Update L4 attributes on manual hibern8 exit in Cadence UFS.Sheeba B1-0/+106
Backup L4 attributes duirng manual hibern8 entry and restore the L4 attributes on manual hibern8 exit as per JESD220C. Link: https://lore.kernel.org/r/1575606303-10917-1-git-send-email-sheebab@cadence.com Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Tested-by: Vignesh Raghavendra <vigneshr@ti.com> Signed-off-by: Sheeba B <sheebab@cadence.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-19scsi: ufs: Do not free irq in suspendCan Guo1-14/+4
Since ufshcd irq resource is allocated with the device resource management aware IRQ request implementation, we don't really need to free up irq during suspend, disabling it during suspend and reenabling it during resume should be good enough. Link: https://lore.kernel.org/r/0101016ed3d69793-22918f99-23bf-495d-8a36-a9c108d1cbce-000000@us-west-2.amazonses.com Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-19scsi: ufs: Do not clear the DL layer timersCan Guo2-0/+31
During power mode change, PACP_PWR_Req frame sends PAPowerModeUserData parameters (and they are considered valid by device if Flags[4] - UserDataValid bit is set in the same frame). Currently we don't set these PAPowerModeUserData parameters and hardware always sets UserDataValid bit which would clear all the DL layer timeout values of the peer device after the power mode change. This change sets the PAPowerModeUserData[0..5] to UniPro specification recommended default values, in addition we are also setting the relevant DME_LOCAL_* timer attributes as required by UFS HCI specification. Link: https://lore.kernel.org/r/0101016ed3d688a4-cfaeb1c9-238b-46c4-9c89-d48c410ba325-000000@us-west-2.amazonses.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-19scsi: ufs: Release clock if DMA map failsCan Guo1-0/+1
In queuecommand path, if DMA map fails, it bails out with clock held. In this case, release the clock to keep its usage paired. [mkp: applied by hand] Link: https://lore.kernel.org/r/0101016ed3d66395-1b7e7fce-b74d-42ca-a88a-4db78b795d3b-000000@us-west-2.amazonses.com Reviewed-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-19scsi: ufs: Use DBD setting in mode senseCan Guo1-0/+3
UFS standard requires DBD field to be set to 1 in MODE SENSE(10). Some card vendors are more strict and check the DBD field, hence respond with CHECK_CONDITION (Sense key set to ILLEGAL_REQUEST and ASC set to INVALID FIELD IN CDB). When host sends MODE SENSE for page caching, as a result of the CHECK_CONDITION response, host assumes that the device doesn't support the cache feature and doesn't send SYNCHRONIZE_CACHE commands to flush the device cache. This can result in data corruption in case of sudden power down when there is data stored in the device cache. This patch fixes the DBD field setting as required in UFS standard. Link: https://lore.kernel.org/r/0101016ed3d657e4-32a6dd52-1505-4312-97ff-2bd3bee59eb7-000000@us-west-2.amazonses.com Reviewed-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-19scsi: ufs: Complete pending requests in host reset and restore pathCan Guo2-14/+12
In UFS host reset and restore path, before probe, we stop and start the host controller once. After host controller is stopped, the pending requests, if any, are cleared from the doorbell, but no completion IRQ would be raised due to the hba is stopped. These pending requests shall be completed along with the first NOP_OUT command (as it is the first command which can raise a transfer completion IRQ) sent during probe. Since the OCSs of these pending requests are not SUCCESS (because they are not yet literally finished), their UPIUs shall be dumped. When there are multiple pending requests, the UPIU dump can be overwhelming and may lead to stability issues because it is in atomic context. Therefore, before probe, complete these pending requests right after host controller is stopped and silence the UPIU dump from them. Link: https://lore.kernel.org/r/1574751214-8321-5-git-send-email-cang@qti.qualcomm.com Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Bean Huo <beanhuo@micron.com> Tested-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-19scsi: ufs: Avoid messing up the compl_time_stamp of lrbsCan Guo1-2/+2
To be on the safe side, do not touch lrb after clearing its slot in the lrb_in_use bitmap to avoid messing up the next task which would possibly occupy this lrb. [mkp: applied by hand] Link: https://lore.kernel.org/r/1574751214-8321-4-git-send-email-cang@qti.qualcomm.com Reviewed by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-19scsi: ufs: Update VCCQ2 and VCCQ min/max voltage hard codesCan Guo1-3/+3
Per UFS 3.0 JEDEC standard, the VCCQ2 min voltage is 1.7v and the VCCQ voltage range is 1.14v ~ 1.26v. Update their hard codes accordingly to make sure they work in a safe range compliant for ver 1.0/1.1/2.0/2.1/3.0 UFS devices. Link: https://lore.kernel.org/r/1574751214-8321-3-git-send-email-cang@qti.qualcomm.com Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-19scsi: ufs: Recheck bkops level if bkops is disabledAsutosh Das1-0/+3
bkops level should be rechecked upon receiving an exception. Currently the level is being cached and never updated. Update bkops each time the level is checked. Also do not use the cached bkops level value if it is disabled and then enabled. Fixes: afdfff59a0e0 (scsi: ufs: handle non spec compliant bkops behaviour by device) Link: https://lore.kernel.org/r/1574751214-8321-2-git-send-email-cang@qti.qualcomm.com Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Tested-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-19scsi: ufs: Use blk_{get,put}_request() to allocate and free TMFsBart Van Assche2-62/+80
Manage TMF tags with blk_{get,put}_request() instead of ufshcd_get_tm_free_slot() / ufshcd_put_tm_slot(). Store a per-request completion pointer in request.end_io_data instead of using a waitqueue to report TMF completion. Cc: Can Guo <cang@codeaurora.org> Cc: Stanley Chu <stanley.chu@mediatek.com> Cc: Avri Altman <avri.altman@wdc.com> Cc: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20191209181309.196233-3-bvanassche@acm.org Tested-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-19scsi: ufs: Avoid busy-waiting by eliminating tag conflictsBart Van Assche2-77/+50
Instead of tracking which tags are in use in the ufs_hba.lrb_in_use bitmask, rely on the block layer tag allocation mechanism. This patch removes the following busy-waiting loop if ufshcd_issue_devman_upiu_cmd() and the block layer accidentally allocate the same tag for a SCSI request: * ufshcd_queuecommand() returns SCSI_MLQUEUE_HOST_BUSY. * The SCSI core requeues the SCSI command. Cc: Can Guo <cang@codeaurora.org> Cc: Stanley Chu <stanley.chu@mediatek.com> Cc: Avri Altman <avri.altman@wdc.com> Cc: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20191209181309.196233-2-bvanassche@acm.org Tested-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-09scsi: ufs: Disable autohibern8 feature in Cadence UFSsheebab1-0/+6
This patch disables autohibern8 feature in Cadence UFS. The autohibern8 feature has issues due to which unexpected interrupt trigger is happening. After the interrupt issue is sorted out, autohibern8 feature will be re-enabled Link: https://lore.kernel.org/r/1575367635-22662-1-git-send-email-sheebab@cadence.com Cc: <stable@vger.kernel.org> Signed-off-by: sheebab <sheebab@cadence.com> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Tested-by: Vignesh Raghavendra <vigneshr@ti.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-09scsi: ufs: Give an unique ID to each ufs-bsgCan Guo1-1/+1
Considering there can be multiple UFS hosts in SoC, give each ufs-bsg an unique ID by appending the scsi host number to its device name. Link: https://lore.kernel.org/r/0101016eca8dc9d7-d24468d3-04d2-4ef3-a906-abe8b8cbcd3d-000000@us-west-2.amazonses.com Fixes: df032bf27a41 ("scsi: ufs: Add a bsg endpoint that supports UPIUs") Signed-off-by: Can Guo <cang@codeaurora.org> Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-12-02Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds14-83/+329
Pull SCSI updates from James Bottomley: "This is mostly update of the usual drivers: aacraid, ufs, zfcp, NCR5380, lpfc, qla2xxx, smartpqi, hisi_sas, target, mpt3sas, pm80xx plus a whole load of minor updates and fixes. The major core changes are Al Viro's reworking of sg's handling of copy to/from user, Ming Lei's removal of the host busy counter to avoid contention in the multiqueue case and Damien Le Moal's fixing of residual tracking across error handling" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (251 commits) scsi: bnx2fc: timeout calculation invalid for bnx2fc_eh_abort() scsi: target: core: Fix a pr_debug() argument scsi: iscsi: Don't send data to unbound connection scsi: target: iscsi: Wait for all commands to finish before freeing a session scsi: target: core: Release SPC-2 reservations when closing a session scsi: target: core: Document target_cmd_size_check() scsi: bnx2i: fix potential use after free Revert "scsi: qla2xxx: Fix memory leak when sending I/O fails" scsi: NCR5380: Add disconnect_mask module parameter scsi: NCR5380: Unconditionally clear ICR after do_abort() scsi: NCR5380: Call scsi_set_resid() on command completion scsi: scsi_debug: num_tgts must be >= 0 scsi: lpfc: use hdwq assigned cpu for allocation scsi: arcmsr: fix indentation issues scsi: qla4xxx: fix double free bug scsi: pm80xx: Modified the logic to collect fatal dump scsi: pm80xx: Tie the interrupt name to the module instance scsi: pm80xx: Controller fatal error through sysfs scsi: pm80xx: Do not request 12G sas speeds scsi: pm80xx: Cleanup command when a reset times out ...
2019-11-19scsi: ufs: Fix error handing during hibern8 enterSubhash Jadavani1-5/+14
During clock gating (ufshcd_gate_work()), we first put the link hibern8 by calling ufshcd_uic_hibern8_enter() and if ufshcd_uic_hibern8_enter() returns success (0) then we gate all the clocks. Now let’s zoom in to what ufshcd_uic_hibern8_enter() does internally: It calls __ufshcd_uic_hibern8_enter() and if failure is encountered, link recovery shall put the link back to the highest HS gear and returns success (0) to ufshcd_uic_hibern8_enter() which is the issue as link is still in active state due to recovery! Now ufshcd_uic_hibern8_enter() returns success to ufshcd_gate_work() and hence it goes ahead with gating the UFS clock while link is still in active state hence I believe controller would raise UIC error interrupts. But when we service the interrupt, clocks might have already been disabled! This change fixes for this by returning failure from __ufshcd_uic_hibern8_enter() if recovery succeeds as link is still not in hibern8, upon receiving the error ufshcd_hibern8_enter() would initiate retry to put the link state back into hibern8. Link: https://lore.kernel.org/r/1573798172-20534-8-git-send-email-cang@codeaurora.org Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-11-19scsi: ufs: Abort gating if clock on request is pendingAsutosh Das1-1/+1
This change attempts to abort gating of clocks if a request to turn-on clocks is pending. This would in turn avoid turning OFF and back ON the clocks. Link: https://lore.kernel.org/r/1573798172-20534-7-git-send-email-cang@codeaurora.org Reviewed-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-11-19scsi: ufs: Fix irq return codeVenkat Gopalakrishnan2-36/+100
Return IRQ_HANDLED only if the irq is really handled, this will help in catching spurious interrupts that go unhandled. Link: https://lore.kernel.org/r/1573798172-20534-6-git-send-email-cang@codeaurora.org Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-11-18scsi: ufs: Fix register dump caused sleep in atomic contextCan Guo1-1/+1
ufshcd_print_host_regs() can be called by interrupt handler, but it may sleep due to ufshcd_dump_regs() allocates the dump buffer memory with flag GFP_KERNEL. Fix it by changing GFP_KERNEL to GFP_ATMOIC. Link: https://lore.kernel.org/r/1573798172-20534-5-git-send-email-cang@codeaurora.org Reviewed-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-11-18scsi: ufs: Fix up auto hibern8 enablementCan Guo3-13/+18
Fix up possible unclocked register access to auto hibern8 register in resume path and through sysfs entry. Meanwhile, enable auto hibern8 only after device is fully initialized in probe path. Link: https://lore.kernel.org/r/1573798172-20534-4-git-send-email-cang@codeaurora.org Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-11-18scsi: ufs-qcom: Add reset control support for host controllerCan Guo2-0/+56
Add reset control for host controller so that host controller can be reset as required in its power up sequence. Link: https://lore.kernel.org/r/1573798172-20534-3-git-send-email-cang@codeaurora.org Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-11-18scsi: ufs: Add device reset in link recovery pathCan Guo1-0/+3
In order to recover from hibern8 exit failure, perform a reset in link recovery path before issuing link start-up. Link: https://lore.kernel.org/r/1573798172-20534-2-git-send-email-cang@codeaurora.org Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-11-12scsi: ufs: ufshcd: Remove dev_err() on platform_get_irq() failureYueHaibing1-1/+0
platform_get_irq() will call dev_err() itself on failure, so there is no need for the driver to also do this. This is detected by coccinelle. Link: https://lore.kernel.org/r/20191101140058.23212-1-yuehaibing@huawei.com Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-11-12scsi: ufs: fix potential bug which ends in system hangBean Huo1-1/+1
In function __ufshcd_query_descriptor(), in the event of an error happening, we directly goto out_unlock and forget to invaliate hba->dev_cmd.query.descriptor pointer. This results in this pointer still valid in ufshcd_copy_query_response() for other query requests which go through ufshcd_exec_raw_upiu_cmd(). This will cause __memcpy() crash and system hangs. Log as shown below: Unable to handle kernel paging request at virtual address ffff000012233c40 Mem abort info: ESR = 0x96000047 Exception class = DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 Data abort info: ISV = 0, ISS = 0x00000047 CM = 0, WnR = 1 swapper pgtable: 4k pages, 48-bit VAs, pgdp = 0000000028cc735c [ffff000012233c40] pgd=00000000bffff003, pud=00000000bfffe003, pmd=00000000ba8b8003, pte=0000000000000000 Internal error: Oops: 96000047 [#2] PREEMPT SMP ... Call trace: __memcpy+0x74/0x180 ufshcd_issue_devman_upiu_cmd+0x250/0x3c0 ufshcd_exec_raw_upiu_cmd+0xfc/0x1a8 ufs_bsg_request+0x178/0x3b0 bsg_queue_rq+0xc0/0x118 blk_mq_dispatch_rq_list+0xb0/0x538 blk_mq_sched_dispatch_requests+0x18c/0x1d8 __blk_mq_run_hw_queue+0xb4/0x118 blk_mq_run_work_fn+0x28/0x38 process_one_work+0x1ec/0x470 worker_thread+0x48/0x458 kthread+0x130/0x138 ret_from_fork+0x10/0x1c Code: 540000ab a8c12027 a88120c7 a8c12027 (a88120c7) ---[ end trace 793e1eb5dff69f2d ]--- note: kworker/0:2H[2054] exited with preempt_count 1 This patch is to move "descriptor = NULL" down to below the label "out_unlock". Fixes: d44a5f98bb49b2(ufs: query descriptor API) Link: https://lore.kernel.org/r/20191112223436.27449-3-huobean@gmail.com Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-11-12scsi: ufs: print helpful hint when response size exceed buffer sizeBean Huo1-3/+5
Print out returned response size and buffer size, while the front one is bigger than the back one. Link: https://lore.kernel.org/r/20191112223436.27449-2-huobean@gmail.com Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-11-12scsi: ufs: Add driver for TI wrapper for Cadence UFS IPVignesh Raghavendra3-0/+101
TI's J721e SoC has a Cadence UFS IP with a TI specific wrapper. This is a minimal driver to configure the wrapper. It releases the UFS slave device out of reset and sets up registers to indicate PHY reference clock input frequency before probing child Cadence UFS driver. Link: https://lore.kernel.org/r/20191108164857.11466-3-vigneshr@ti.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-11-02Merge tag 'scsi-fixes' of ↵Linus Torvalds1-0/+4
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI fixes from James Bottomley: "Nine changes, eight in drivers [ufs, target, lpfc x 2, qla2xxx x 4] and one core change in sd that fixes an I/O failure on DIF type 3 devices" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: qla2xxx: stop timer in shutdown path scsi: sd: define variable dif as unsigned int instead of bool scsi: target: cxgbit: Fix cxgbit_fw4_ack() scsi: qla2xxx: Fix partial flash write of MBI scsi: qla2xxx: Initialized mailbox to prevent driver load failure scsi: lpfc: Honor module parameter lpfc_use_adisc scsi: ufs-bsg: Wake the device before sending raw upiu commands scsi: lpfc: Check queue pointer before use scsi: qla2xxx: fixup incorrect usage of host_byte
2019-10-31scsi: ufs: Use enum dev_cmd_type where appropriateBart Van Assche1-2/+2
Declare all variables that hold dev_cmd_type values as an enum instead of as an int. Cc: Yaniv Gardi <ygardi@codeaurora.org> Cc: Subhash Jadavani <subhashj@codeaurora.org> Cc: Stanley Chu <stanley.chu@mediatek.com> Cc: Avri Altman <avri.altman@wdc.com> Cc: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20191029230710.211926-3-bvanassche@acm.org Signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-10-31scsi: ufs: Fix kernel-doc warningsBart Van Assche2-1/+2
Fix the following three kernel-doc warnings: drivers/scsi/ufs/ufs_bsg.c:165: warning: Function parameter or member 'hba' not described in 'ufs_bsg_remove' drivers/scsi/ufs/ufshcd.c:5789: warning: Function parameter or member 'cmd_type' not described in 'ufshcd_issue_devman_upiu_cmd' drivers/scsi/ufs/ufshcd.c:5789: warning: Excess function parameter 'msgcode' description in 'ufshcd_issue_devman_upiu_cmd' Cc: Yaniv Gardi <ygardi@codeaurora.org> Cc: Subhash Jadavani <subhashj@codeaurora.org> Cc: Stanley Chu <stanley.chu@mediatek.com> Cc: Avri Altman <avri.altman@wdc.com> Cc: Tomas Winkler <tomas.winkler@intel.com> Link: https://lore.kernel.org/r/20191029230710.211926-2-bvanassche@acm.org Signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-10-31scsi: ufs: delete redundant function ufshcd_def_desc_sizes()Bean Huo1-14/+1
There is no need to call ufshcd_def_desc_sizes() in ufshcd_init(), since descriptor lengths will be checked and initialized later in ufshcd_init_desc_sizes(). Fixes: a4b0e8a4e92b1b(scsi: ufs: Factor out ufshcd_read_desc_param) Link: https://lore.kernel.org/r/BN7PR08MB5684A3ACE214C3D4792CE729DB610@BN7PR08MB5684.namprd08.prod.outlook.com Signed-off-by: Bean Huo <beanhuo@micron.com> Acked-by: Avri Altman <avri.altman.wdc.com> Reviewed-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-10-18scsi: ufs-bsg: Wake the device before sending raw upiu commandsAvri Altman1-0/+4
The scsi async probe process is calling blk_pm_runtime_init for each lun, and then those request queues are monitored by the block layer pm engine (blk-pm.c). This is however, not the case for scsi-passthrough queues, created by bsg_setup_queue(). So the ufs-bsg driver might send various commands, disregarding the pm status of the device. This is wrong, regardless if its request queue is pm-aware or not. Fixes: df032bf27a41 (scsi: ufs: Add a bsg endpoint that supports UPIUs) Link: https://lore.kernel.org/r/1570696267-8487-1-git-send-email-avri.altman@wdc.com Reported-by: Yuliy Izrailov <yuliy.izrailov@wdc.com> Signed-off-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-10-09Merge branch '5.4/scsi-fixes' into 5.5/scsi-queueMartin K. Petersen1-0/+3
The qla2xxx driver updates for 5.5 depend on the fixes queued for 5.4. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-10-05Merge tag 'scsi-fixes' of ↵Linus Torvalds1-0/+3
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI fixes from James Bottomley: "Twelve patches mostly small but obvious fixes or cosmetic but small updates" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: qla2xxx: Fix Nport ID display value scsi: qla2xxx: Fix N2N link up fail scsi: qla2xxx: Fix N2N link reset scsi: qla2xxx: Optimize NPIV tear down process scsi: qla2xxx: Fix stale mem access on driver unload scsi: qla2xxx: Fix unbound sleep in fcport delete path. scsi: qla2xxx: Silence fwdump template message scsi: hisi_sas: Make three functions static scsi: megaraid: disable device when probe failed after enabled device scsi: storvsc: setup 1:1 mapping between hardware queue and CPU queue scsi: qedf: Remove always false 'tmp_prio < 0' statement scsi: ufs: skip shutdown if hba is not powered scsi: bnx2fc: Handle scope bits when array returns BUSY or TSF
2019-09-30scsi: ufs-mediatek: enable auto suspend capabilityStanley Chu1-0/+3
Enable auto suspend capability in MediaTek UFS driver. Link: https://lore.kernel.org/r/1568649411-5127-4-git-send-email-stanley.chu@mediatek.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-09-30scsi: ufs: override auto suspend tunables for ufsStanley Chu2-0/+19
Rework from previous work by: Sujit Reddy Thumma <sthumma@codeaurora.org> Override auto suspend tunables for UFS device LUNs during initialization so as to efficiently manage background operations and the power consumption. Link: https://lore.kernel.org/r/1568649411-5127-3-git-send-email-stanley.chu@mediatek.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-09-30scsi: ufs-hisi: Use PTR_ERR_OR_ZERO() in ufs_hisi_get_resource()Markus Elfring1-4/+1
Simplify this function implementation by using a known function. Generated by: scripts/coccinelle/api/ptr_ret.cocci [mkp: applied by hand] Link: https://lore.kernel.org/r/9e667f19-434e-ed30-78cb-9ddc6323c51e@web.de Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-09-30scsi: ufs: make array setup_attrs static const, makes object smallerColin Ian King1-1/+1
Don't populate the array setup_attrs on the stack but instead make it static const. Makes the object code smaller by 180 bytes. Before: text data bss dec hex filename 2140 224 0 2364 93c drivers/scsi/ufs/ufshcd-dwc.o After: text data bss dec hex filename 1863 320 0 2183 887 drivers/scsi/ufs/ufshcd-dwc.o (gcc version 9.2.1, amd64) Link: https://lore.kernel.org/r/20190906170104.10450-1-colin.king@canonical.com Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-09-23scsi: ufs: skip shutdown if hba is not poweredStanley Chu1-0/+3
In some cases, hba may go through shutdown flow without successful initialization and then make system hang. For example, if ufshcd_change_power_mode() gets error and leads to ufshcd_hba_exit() to release resources of the host, future shutdown flow may hang the system since the host register will be accessed in unpowered state. To solve this issue, simply add checking to skip shutdown for above kind of situation. Link: https://lore.kernel.org/r/1568780438-28753-1-git-send-email-stanley.chu@mediatek.com Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Acked-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-09-21Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds9-154/+297
Pull SCSI updates from James Bottomley: "This is mostly update of the usual drivers: qla2xxx, ufs, smartpqi, lpfc, hisi_sas, qedf, mpt3sas; plus a whole load of minor updates. The only core change this time around is the addition of request batching for virtio. Since batching requires an additional flag to use, it should be invisible to the rest of the drivers" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (264 commits) scsi: hisi_sas: Fix the conflict between device gone and host reset scsi: hisi_sas: Add BIST support for phy loopback scsi: hisi_sas: Add hisi_sas_debugfs_alloc() to centralise allocation scsi: hisi_sas: Remove some unused function arguments scsi: hisi_sas: Remove redundant work declaration scsi: hisi_sas: Remove hisi_sas_hw.slot_complete scsi: hisi_sas: Assign NCQ tag for all NCQ commands scsi: hisi_sas: Update all the registers after suspend and resume scsi: hisi_sas: Retry 3 times TMF IO for SAS disks when init device scsi: hisi_sas: Remove sleep after issue phy reset if sas_smp_phy_control() fails scsi: hisi_sas: Directly return when running I_T_nexus reset if phy disabled scsi: hisi_sas: Use true/false as input parameter of sas_phy_reset() scsi: hisi_sas: add debugfs auto-trigger for internal abort time out scsi: virtio_scsi: unplug LUNs when events missed scsi: scsi_dh_rdac: zero cdb in send_mode_select() scsi: fcoe: fix null-ptr-deref Read in fc_release_transport scsi: ufs-hisi: use devm_platform_ioremap_resource() to simplify code scsi: ufshcd: use devm_platform_ioremap_resource() to simplify code scsi: hisi_sas: use devm_platform_ioremap_resource() to simplify code scsi: ufs: Use kmemdup in ufshcd_read_string_desc() ...
2019-09-07scsi: ufs-hisi: use devm_platform_ioremap_resource() to simplify codeYueHaibing1-3/+1
Use devm_platform_ioremap_resource() to simplify the code a bit. This is detected by coccinelle. Link: https://lore.kernel.org/r/20190904130457.24744-1-yuehaibing@huawei.com Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: YueHaibing <yuehaibing@huawei.com> Reviewed-by: Avri Altman <avri.altman@wdc.com> Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-09-07scsi: ufshcd: use devm_platform_ioremap_resource() to simplify codeYueHaibing1-3/+1
Use devm_platform_ioremap_resource() to simplify the code a bit. This is detected by coccinelle. Link: https://lore.kernel.org/r/20190904130348.24772-1-yuehaibing@huawei.com Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: YueHaibing <yuehaibing@huawei.com> Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-06 08:36:46 +0000