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2021-10-27scsi: ufs: ufs-exynos: Factor out priv data initChanho Park
To leverage the initialization code for the other variant of the exynos-ufs driver, factor out the assignment part. Link: https://lore.kernel.org/r/20211018124216.153072-10-chanho61.park@samsung.com Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: Kiwoong Kim <kwmad.kim@samsung.com> Cc: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Signed-off-by: Chanho Park <chanho61.park@samsung.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-27scsi: ufs: ufs-exynos: Add EXYNOS_UFS_OPT_SKIP_CONFIG_PHY_ATTR optionChanho Park
To skip exynos_ufs_config_phy_*_attr settings for exynos-ufs variant, provide EXYNOS_UFS_OPT_SKIP_CONFIG_PHY_ATTR as an opts flag. For the ExynosAuto v9 SoC's controller, M-Phy timing setting is not required and most of vendor-specific configuration will be performed in the pre_link callback function. Link: https://lore.kernel.org/r/20211018124216.153072-9-chanho61.park@samsung.com Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: Kiwoong Kim <kwmad.kim@samsung.com> Cc: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Signed-off-by: Chanho Park <chanho61.park@samsung.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-27scsi: ufs: ufs-exynos: Support custom version of ufs_hba_variant_opsChanho Park
By default, ufs_hba_exynos_ops will be used. Add support for a custom version of ufs_hba_variant_ops because some variants of exynos-ufs will use only few callbacks. Link: https://lore.kernel.org/r/20211018124216.153072-8-chanho61.park@samsung.com Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: Kiwoong Kim <kwmad.kim@samsung.com> Cc: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Chanho Park <chanho61.park@samsung.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-27scsi: ufs: ufs-exynos: Add setup_clocks callbackChanho Park
Add setup_clocks callback to control/gate clocks by ufshcd. To avoid calling before initialization, check whether UFS is on or not and call it initially from pre_link callback. Link: https://lore.kernel.org/r/20211018124216.153072-7-chanho61.park@samsung.com Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: Kiwoong Kim <kwmad.kim@samsung.com> Cc: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Signed-off-by: Chanho Park <chanho61.park@samsung.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-27scsi: ufs: ufs-exynos: Add refclkout_stop controlChanho Park
This patch adds REFCLKOUT_STOP control to CLK_STOP_MASK. This permits enabling/disabling reference clock out control for the UFS device. Link: https://lore.kernel.org/r/20211018124216.153072-6-chanho61.park@samsung.com Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Chanho Park <chanho61.park@samsung.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-27scsi: ufs: ufs-exynos: Simplify drv_data retrievalChanho Park
The compatible field of exynos_ufs_drv_data is not necessary because of_device_id already has it. Thus, we don't need it anymore and we can get drv_data by device_get_match_data. Link: https://lore.kernel.org/r/20211018124216.153072-5-chanho61.park@samsung.com Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Chanho Park <chanho61.park@samsung.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-27scsi: ufs: ufs-exynos: Change pclk available max valueChanho Park
To support 167MHz PCLK, we need to adjust the maximum value. Link: https://lore.kernel.org/r/20211018124216.153072-4-chanho61.park@samsung.com Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Chanho Park <chanho61.park@samsung.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-27scsi: ufs: Add quirk to enable host controller without PH configurationjongmin jeong
Samsung ExynosAuto v9 SoC virtual hosts do not support device management. Add a quirk to skip the physical host interface configuration part that cannot be performed in the virtual host. Link: https://lore.kernel.org/r/20211018124216.153072-3-chanho61.park@samsung.com Cc: James E.J. Bottomley <jejb@linux.ibm.com> Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Bart Van Assche <bvanassche@acm.org> Suggested-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: jongmin jeong <jjmin.jeong@samsung.com> Signed-off-by: Chanho Park <chanho61.park@samsung.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-27scsi: ufs: Add quirk to handle broken UIC commandjongmin jeong
Samsung ExynosAuto v9 SoC has two types of host controller interface to support the virtualization of UFS Device. One is the physical host (PH) that is the same as conventional UFSHCI, and the other is the virtual host (VH) that supports data transfer function only. In this configuration the virtual host does not support UIC commands. Add a quirk to return 0 when the UIC command send function is called. Link: https://lore.kernel.org/r/20211018124216.153072-2-chanho61.park@samsung.com Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: James E.J. Bottomley <jejb@linux.ibm.com> Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: jongmin jeong <jjmin.jeong@samsung.com> Signed-off-by: Chanho Park <chanho61.park@samsung.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-26scsi: ufs: core: Micro-optimize ufshcd_map_sg()Bart Van Assche
Replace two cpu_to_le32() calls by a single cpu_to_le64() call. Additionally, issue a warning if the length of an scatter gather list element exceeds what is allowed by the UFSHCI specification. Link: https://lore.kernel.org/r/20211020214024.2007615-11-bvanassche@acm.org Acked-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>
2021-10-26scsi: ufs: core: Add a compile-time structure size checkBart Van Assche
Before modifying struct ufshcd_sg_entry, add a compile-time structure size check. Link: https://lore.kernel.org/r/20211020214024.2007615-10-bvanassche@acm.org Acked-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>
2021-10-26scsi: ufs: core: Remove three superfluous castsBart Van Assche
Casting an int explicitly to u16 when passed as an argument to a function is not necessary. Since prd_table and ucd_prdt_ptr both have type struct ufshcd_sg_entry *, remove the casts from assignments of these two to each other. This patch does not change any functionality. Link: https://lore.kernel.org/r/20211020214024.2007615-9-bvanassche@acm.org Acked-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>
2021-10-26scsi: ufs: core: Add debugfs attributes for triggering the UFS EHBart Van Assche
Make it easier to test the impact of the UFS error handler on software that submits SCSI commands to the UFS driver. Link: https://lore.kernel.org/r/20211020214024.2007615-8-bvanassche@acm.org Acked-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>
2021-10-26scsi: ufs: core: Make it easier to add new debugfs attributesBart Van Assche
Introduce an array for debugfs attributes to make it easier to add new debugfs attributes. Change the value of the inode.i_private pointer for debugfs attributes from a pointer to the HBA data structure to a pointer to the attribute description for the stats attribute. Store the HBA pointer in the private data of the parent inode instead. Link: https://lore.kernel.org/r/20211020214024.2007615-7-bvanassche@acm.org Acked-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>
2021-10-26scsi: ufs: core: Export ufshcd_schedule_eh_work()Bart Van Assche
Make it possible to call ufshcd_schedule_eh_work() from other source files than ufshcd.c. Additionally, convert a source code comment into a lockdep_assert_held() call. Link: https://lore.kernel.org/r/20211020214024.2007615-6-bvanassche@acm.org Acked-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>
2021-10-26scsi: ufs: core: Log error handler activityBart Van Assche
Kernel logs are hard to comprehend without information about what the UFS error handler is doing. Hence this patch that logs information about error handler activity. Link: https://lore.kernel.org/r/20211020214024.2007615-5-bvanassche@acm.org Acked-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>
2021-10-26scsi: ufs: core: Improve static type checkingBart Van Assche
Introduce an enumeration type for the overall command status to allow the compiler to perform more static type checking. Link: https://lore.kernel.org/r/20211020214024.2007615-4-bvanassche@acm.org Acked-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>
2021-10-26scsi: ufs: core: Improve source code commentsBart Van Assche
Make the descriptions above data structures that come from the UFS specification match the terminology from that specification. This makes it easier to find these data structures while reading the UFS specification. Link: https://lore.kernel.org/r/20211020214024.2007615-3-bvanassche@acm.org Acked-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>
2021-10-26scsi: ufs: Revert "Retry aborted SCSI commands instead of completing these ↵Bart Van Assche
successfully" Commit 73dc3c4ac703 ("scsi: ufs: Retry aborted SCSI commands instead of completing these successfully") is not necessary. If a SCSI command is aborted successfully the UFS controller has not modified the command status and the command status still has the value assigned by ufshcd_prepare_req_desc_hdr(), namely OCS_INVALID_COMMAND_STATUS. The function ufshcd_transfer_rsp_status() requeues commands that have an invalid command status. Hence revert commit 73dc3c4ac703. Link: https://lore.kernel.org/r/20211020214024.2007615-2-bvanassche@acm.org Acked-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>
2021-10-21blk-crypto: rename blk_keyslot_manager to blk_crypto_profileEric Biggers
blk_keyslot_manager is misnamed because it doesn't necessarily manage keyslots. It actually does several different things: - Contains the crypto capabilities of the device. - Provides functions to control the inline encryption hardware. Originally these were just for programming/evicting keyslots; however, new functionality (hardware-wrapped keys) will require new functions here which are unrelated to keyslots. Moreover, device-mapper devices already (ab)use "keyslot_evict" to pass key eviction requests to their underlying devices even though device-mapper devices don't have any keyslots themselves (so it really should be "evict_key", not "keyslot_evict"). - Sometimes (but not always!) it manages keyslots. Originally it always did, but device-mapper devices don't have keyslots themselves, so they use a "passthrough keyslot manager" which doesn't actually manage keyslots. This hack works, but the terminology is unnatural. Also, some hardware doesn't have keyslots and thus also uses a "passthrough keyslot manager" (support for such hardware is yet to be upstreamed, but it will happen eventually). Let's stop having keyslot managers which don't actually manage keyslots. Instead, rename blk_keyslot_manager to blk_crypto_profile. This is a fairly big change, since for consistency it also has to update keyslot manager-related function names, variable names, and comments -- not just the actual struct name. However it's still a fairly straightforward change, as it doesn't change any actual functionality. Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # For MMC Reviewed-by: Mike Snitzer <snitzer@redhat.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Eric Biggers <ebiggers@google.com> Link: https://lore.kernel.org/r/20211018180453.40441-4-ebiggers@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-21blk-crypto: rename keyslot-manager files to blk-crypto-profileEric Biggers
In preparation for renaming struct blk_keyslot_manager to struct blk_crypto_profile, rename the keyslot-manager.h and keyslot-manager.c source files. Renaming these files separately before making a lot of changes to their contents makes it easier for git to understand that they were renamed. Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # For MMC Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mike Snitzer <snitzer@redhat.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Eric Biggers <ebiggers@google.com> Link: https://lore.kernel.org/r/20211018180453.40441-3-ebiggers@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-20scsi: ufs: ufs-exynos: Correct timeout value setting registersChanho Park
PA_PWRMODEUSERDATA0 -> DL_FC0PROTTIMEOUTVAL PA_PWRMODEUSERDATA1 -> DL_TC0REPLAYTIMEOUTVAL PA_PWRMODEUSERDATA2 -> DL_AFC0REQTIMEOUTVAL Link: https://lore.kernel.org/r/20211018062841.18226-1-chanho61.park@samsung.com Fixes: a967ddb22d94 ("scsi: ufs: ufs-exynos: Apply vendor-specific values for three timeouts") Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: Kiwoong Kim <kwmad.kim@samsung.com> Cc: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Chanho Park <chanho61.park@samsung.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-20scsi: ufs: ufshcd-pltfrm: Fix memory leak due to probe deferSrinivas Kandagatla
UFS drivers that probe defer will end up leaking memory allocated for clk and regulator names via kstrdup() because the structure that is holding this memory is allocated via devm_* variants which will be freed during probe defer but the names are never freed. Use same devm_* variant of kstrdup to free the memory allocated to name when driver probe defers. Kmemleak found around 11 leaks on Qualcomm Dragon Board RB5: unreferenced object 0xffff66f243fb2c00 (size 128): comm "kworker/u16:0", pid 7, jiffies 4294893319 (age 94.848s) hex dump (first 32 bytes): 63 6f 72 65 5f 63 6c 6b 00 76 69 72 74 75 61 6c core_clk.virtual 2f 77 6f 72 6b 71 75 65 75 65 2f 73 63 73 69 5f /workqueue/scsi_ backtrace: [<000000006f788cd1>] slab_post_alloc_hook+0x88/0x410 [<00000000cfd1372b>] __kmalloc_track_caller+0x138/0x230 [<00000000a92ab17b>] kstrdup+0xb0/0x110 [<0000000037263ab6>] ufshcd_pltfrm_init+0x1a8/0x500 [<00000000a20a5caa>] ufs_qcom_probe+0x20/0x58 [<00000000a5e43067>] platform_probe+0x6c/0x118 [<00000000ef686e3f>] really_probe+0xc4/0x330 [<000000005b18792c>] __driver_probe_device+0x88/0x118 [<00000000a5d295e8>] driver_probe_device+0x44/0x158 [<000000007e83f58d>] __device_attach_driver+0xb4/0x128 [<000000004bfa4470>] bus_for_each_drv+0x68/0xd0 [<00000000b89a83bc>] __device_attach+0xec/0x170 [<00000000ada2beea>] device_initial_probe+0x14/0x20 [<0000000079921612>] bus_probe_device+0x9c/0xa8 [<00000000d268bf7c>] deferred_probe_work_func+0x90/0xd0 [<000000009ef64bfa>] process_one_work+0x29c/0x788 unreferenced object 0xffff66f243fb2c80 (size 128): comm "kworker/u16:0", pid 7, jiffies 4294893319 (age 94.848s) hex dump (first 32 bytes): 62 75 73 5f 61 67 67 72 5f 63 6c 6b 00 00 00 00 bus_aggr_clk.... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ With this patch no memory leaks are reported. Link: https://lore.kernel.org/r/20210914092214.6468-1-srinivas.kandagatla@linaro.org Fixes: aa4976130934 ("ufs: Add regulator enable support") Fixes: c6e79dacd86f ("ufs: Add clock initialization support") Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-20scsi: ufs: mediatek: Avoid sched_clock() misuseArnd Bergmann
sched_clock() is not meant to be used in portable driver code, and assuming a particular clock frequency is not how this is meant to be used. It also causes a build failure because of a missing header inclusion: drivers/scsi/ufs/ufs-mediatek.c:321:12: error: implicit declaration of function 'sched_clock' [-Werror,-Wimplicit-function-declaration] timeout = sched_clock() + retry_ms * 1000000UL; A better interface to use here ktime_get_mono_fast_ns(), which works mostly like ktime_get() but is safe to use inside of a suspend callback. Link: https://lore.kernel.org/r/20211018132022.2281589-1-arnd@kernel.org Fixes: 9561f58442e4 ("scsi: ufs: mediatek: Support vops pre suspend to disable auto-hibern8") Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-18scsi: ufs: ufs-pci: Force a full restore after suspend-to-diskAdrian Hunter
Implement the ->restore() PM operation and set the link to off, which will force a full reset and restore. This ensures that Host Performance Booster is reset after suspend-to-disk. The Host Performance Booster feature caches logical-to-physical mapping information in the host memory. After suspend-to-disk, such information is not valid, so a full reset and restore is needed. A full reset and restore is done if the SPM level is 5 or 6, but not for other SPM levels, so this change fixes those cases. A full reset and restore also restores base address registers, so that code is removed. Link: https://lore.kernel.org/r/20211018151004.284200-2-adrian.hunter@intel.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-18scsi: ufs: ufs-mediatek: Fix wrong location for ref-clk delayPeter Wang
Fix the location of delay for ref-clk gating and ungating in ufs_mtk_setup_ref_clk(). Link: https://lore.kernel.org/r/20211016005802.7729-4-stanley.chu@mediatek.com Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Peter Wang <peter.wang@mediatek.com> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-18scsi: ufs: ufs-mediatek: Fix build error caused by use of sched_clock()Stanley Chu
Add proper header for using sched_clock(). Link: https://lore.kernel.org/r/20211016005802.7729-3-stanley.chu@mediatek.com Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-18scsi: ufs: ufs-mediatek: Introduce default delay for reference clockStanley Chu
Introduce default delay time for gating or ungating reference clock instead of ambiguous magic numbers. The defined value is suitable for all current MediaTek UFS platforms. Link: https://lore.kernel.org/r/20211016005802.7729-2-stanley.chu@mediatek.com Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-16scsi: ufs: Call scsi_done() directlyBart Van Assche
Conditional statements are faster than indirect calls. Hence call scsi_done() directly. Link: https://lore.kernel.org/r/20211007204618.2196847-1-bvanassche@acm.org Reviewed-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-12scsi: ufs: core: Fix synchronization between scsi_unjam_host() and ↵Adrian Hunter
ufshcd_queuecommand() The SCSI error handler calls scsi_unjam_host() which can call the queue function ufshcd_queuecommand() indirectly. The error handler changes the state to UFSHCD_STATE_RESET while running, but error interrupts that happen while the error handler is running could change the state to UFSHCD_STATE_EH_SCHEDULED_NON_FATAL which would allow requests to go through ufshcd_queuecommand() even though the error handler is running. Block that hole by checking whether the error handler is in progress. Link: https://lore.kernel.org/r/20211008084048.257498-1-adrian.hunter@intel.com Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-12scsi: ufs: mediatek: Support vops pre suspend to disable auto-hibern8Peter Wang
Mediatek UFS needs auto-hibern8 disabled before suspend. Introduce a solution to do pre-suspend before SSU (sleep). Link: https://lore.kernel.org/r/20211006054705.21885-1-peter.wang@mediatek.com Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Peter Wang <peter.wang@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-12Merge branch '5.15/scsi-fixes' into 5.16/scsi-stagingMartin K. Petersen
Merge the 5.15/scsi-fixes branch into the staging tree to resolve UFS conflict reported by sfr. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-04scsi: ufs: core: Do not exit ufshcd_err_handler() unless operational or deadAdrian Hunter
Callers of ufshcd_err_handler() expect it to return in an operational state. However, the code does not check the state before exiting. Add a check for the state and perform retries until either success or the maximum number of retries is reached. Link: https://lore.kernel.org/r/20211002154550.128511-3-adrian.hunter@intel.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-04scsi: ufs: core: Do not exit ufshcd_reset_and_restore() unless operational ↵Adrian Hunter
or dead Callers of ufshcd_reset_and_restore() expect it to return in an operational state. However, the code only checks direct errors and so the ufshcd_state may not be UFSHCD_STATE_OPERATIONAL due to error interrupts. Fix by also checking ufshcd_state, still allowing non-fatal errors which are left for the error handler to deal with. Link: https://lore.kernel.org/r/20211002154550.128511-2-adrian.hunter@intel.com Reviewed-by: Avri altman <avri.altman@wdc.com> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-04scsi: ufs: core: Stop clearing UNIT ATTENTIONSBart Van Assche
Commit aa53f580e67b ("scsi: ufs: Minor adjustments to error handling") introduced a ufshcd_clear_ua_wluns() call in ufshcd_err_handling_unprepare(). As explained in detail by Adrian Hunter, this can trigger a deadlock. Avoid that deadlock by removing the code that clears the unit attention. This is safe because the only software that relies on clearing unit attentions is the Android Trusty software and because support for handling unit attentions has been added in the Trusty software. See also https://lore.kernel.org/linux-scsi/20210930124224.114031-2-adrian.hunter@intel.com/ Note that "scsi: ufs: Retry START_STOP on UNIT_ATTENTION" is a prerequisite for this commit. Link: https://lore.kernel.org/r/20211001182015.1347587-3-jaegeuk@kernel.org Fixes: aa53f580e67b ("scsi: ufs: Minor adjustments to error handling") Cc: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Bart Van Assche <bvanassche@google.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-04scsi: ufs: core: Retry START_STOP on UNIT_ATTENTIONJaegeuk Kim
Commit 57d104c153d3 ("ufs: add UFS power management support") made the UFS driver submit a REQUEST SENSE command before submitting a power management command to a WLUN to clear the POWER ON unit attention. Instead of submitting a REQUEST SENSE command before submitting a power management command, retry the power management command until it succeeds. This is the preparation to get rid of all UNIT ATTENTION code which should be handled by users. Link: https://lore.kernel.org/r/20211001182015.1347587-2-jaegeuk@kernel.org Cc: Adrian Hunter <adrian.hunter@intel.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-04scsi: ufs: core: Remove return statement in void functionBean Huo
Return statement is not useful at the end of "void" function. Link: https://lore.kernel.org/r/20210929200640.828611-4-huobean@gmail.com Signed-off-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-04scsi: ufs: core: Fix ufshcd_probe_hba() prototype to match the definitionBean Huo
Since commit 568dd9959611 ("scsi: ufs: Rename the second ufshcd_probe_hba() argument"), the second ufshcd_probe_hba() argument has been changed to init_dev_params. Link: https://lore.kernel.org/r/20210929200640.828611-3-huobean@gmail.com Fixes: 568dd9959611 ("scsi: ufs: Rename the second ufshcd_probe_hba() argument") 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>
2021-10-04scsi: ufs: core: Fix NULL pointer dereferenceBean Huo
Calling ufshcd_rpm_{get/put}_sync() prior to ufshcd_scsi_add_wlus() being called will trigger a NULL pointer dereference. This is because hba->sdev_ufs_device is initialized in ufshcd_scsi_add_wlus(). Unable to handle kernel NULL pointer dereference at virtual address 0000000000000348 Mem abort info: ESR = 0x96000004 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x04: level 0 translation fault Data abort info: ISV = 0, ISS = 0x00000004 CM = 0, WnR = 0 [0000000000000348] user address but active_mm is swapper Internal error: Oops: 96000004 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 91 Comm: kworker/u16:1 Not tainted 5.15.0-rc1-beanhuo-linaro-1423 Hardware name: MicronRB (DT) Workqueue: events_unbound async_run_entry_fn pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : pm_runtime_drop_link+0x128/0x338 lr : ufshpb_get_dev_info+0x8c/0x148 sp : ffff800012573c10 x29: ffff800012573c10 x28: 0000000000000000 x27: 0000000000000003 x26: ffff000001d21298 x25: 000000005abcea60 x24: ffff800011d89000 x23: 0000000000000001 x22: ffff000001d21880 x21: ffff000001ec9300 x20: 0000000000000004 x19: 0000000000000198 x18: ffffffffffffffff x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000041400 x14: 5eee00201100200a x13: 000000000000bb03 x12: 0000000000000000 x11: 0000000000000100 x10: 0200000000000000 x9 : bb0000021a162c01 x8 : 0302010021021003 x7 : 0000000000000000 x6 : ffff800012573af0 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000200 x2 : 0000000000000348 x1 : 0000000000000348 x0 : ffff80001095308c Call trace: pm_runtime_drop_link+0x128/0x338 ufshpb_get_dev_info+0x8c/0x148 ufshcd_probe_hba+0xda0/0x11b8 ufshcd_async_scan+0x34/0x330 async_run_entry_fn+0x38/0x180 process_one_work+0x1f4/0x498 worker_thread+0x48/0x480 kthread+0x140/0x158 ret_from_fork+0x10/0x20 Code: 88027c01 35ffffa2 17fff6c4 f9800051 (885f7c40) ---[ end trace 2ba541335f595c95 ] ufshpb_get_dev_info() is only called during asynchronous scanning and at that time pm_runtime_get_sync() has been called: ... /* Hold auto suspend until async scan completes */ pm_runtime_get_sync(dev); atomic_set(&hba->scsi_block_reqs_cnt, 0); ... ufshcd_async_scan() ufshcd_probe_hba(hba, true); ufshcd_device_params_init(hba); ufshpb_get_dev_info(); ... pm_runtime_put_sync(hba->dev); Remove ufshcd_rpm_{get/put}_sync() from ufshpb_get_dev_info() to fix this problem. Link: https://lore.kernel.org/r/20210929200640.828611-2-huobean@gmail.com Fixes: 351b3a849ac7 ("scsi: ufs: ufshpb: Use proper power management API") Signed-off-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-10-04scsi: ufs: core: Fix task management completionAdrian Hunter
The UFS driver uses blk_mq_tagset_busy_iter() when identifying task management requests to complete, however blk_mq_tagset_busy_iter() doesn't work. blk_mq_tagset_busy_iter() only iterates requests dispatched by the block layer. That appears as if it might have started since commit 37f4a24c2469 ("blk-mq: centralise related handling into blk_mq_get_driver_tag") which removed 'data->hctx->tags->rqs[rq->tag] = rq' from blk_mq_rq_ctx_init() which gets called: blk_get_request blk_mq_alloc_request __blk_mq_alloc_request blk_mq_rq_ctx_init Since UFS task management requests are not dispatched by the block layer, hctx->tags->rqs[rq->tag] remains NULL, and since blk_mq_tagset_busy_iter() relies on finding requests using hctx->tags->rqs[rq->tag], UFS task management requests are never found by blk_mq_tagset_busy_iter(). By using blk_mq_tagset_busy_iter(), the UFS driver was relying on internal details of the block layer, which was fragile and subsequently got broken. Fix by removing the use of blk_mq_tagset_busy_iter() and having the driver keep track of task management requests. Link: https://lore.kernel.org/r/20210922091059.4040-1-adrian.hunter@intel.com Fixes: 1235fc569e0b ("scsi: ufs: core: Fix task management request completion timeout") Fixes: 69a6c269c097 ("scsi: ufs: Use blk_{get,put}_request() to allocate and free TMFs") Cc: stable@vger.kernel.org Tested-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-09-28scsi: ufs: ufs-qcom: Enter and exit hibern8 during clock scalingAsutosh Das
Qualcomm controller needs to be in hibern8 before scaling clocks. This change puts the controller in hibern8 state before scaling and brings it out after scaling of clocks. Link: https://lore.kernel.org/r/212b7aaf6d834c4a8c682fdac4a59b84013ed573.1632818942.git.nguyenb@codeaurora.org Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Bao D. Nguyen <nguyenb@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-09-28scsi: ufs: core: Export hibern8 entry and exit functionsAsutosh Das
Qualcomm controllers need to be in hibern8 before scaling up or down the clocks. Hence, export the hibern8 entry and exit functions. Link: https://lore.kernel.org/r/a29bfdd0c8f1d1a3e5fb69e43ea277c97a7f0cb6.1632818942.git.nguyenb@codeaurora.org Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Bao D. Nguyen <nguyenb@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-09-28scsi: ufs: core: SCSI_UFS_HWMON depends on HWMON=yAnders Roxell
When building an allmodconfig kernel, the following build error shows up: aarch64-linux-gnu-ld: drivers/scsi/ufs/ufs-hwmon.o: in function `ufs_hwmon_probe': /kernel/next/drivers/scsi/ufs/ufs-hwmon.c:177: undefined reference to `hwmon_device_register_with_info' /kernel/next/drivers/scsi/ufs/ufs-hwmon.c:177:(.text+0x510): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `hwmon_device_register_with_info' aarch64-linux-gnu-ld: drivers/scsi/ufs/ufs-hwmon.o: in function `ufs_hwmon_remove': /kernel/next/drivers/scsi/ufs/ufs-hwmon.c:195: undefined reference to `hwmon_device_unregister' /kernel/next/drivers/scsi/ufs/ufs-hwmon.c:195:(.text+0x5c8): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `hwmon_device_unregister' aarch64-linux-gnu-ld: drivers/scsi/ufs/ufs-hwmon.o: in function `ufs_hwmon_notify_event': /kernel/next/drivers/scsi/ufs/ufs-hwmon.c:206: undefined reference to `hwmon_notify_event' /kernel/next/drivers/scsi/ufs/ufs-hwmon.c:206:(.text+0x64c): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `hwmon_notify_event' aarch64-linux-gnu-ld: /home/anders/src/kernel/next/drivers/scsi/ufs/ufs-hwmon.c:209: undefined reference to `hwmon_notify_event' /kernel/next/drivers/scsi/ufs/ufs-hwmon.c:209:(.text+0x66c): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `hwmon_notify_event' Since SCSI_UFS_HWMON can't be built as a module, SCSI_UFS_HWMON has to depend on HWMON=y. Link: https://lore.kernel.org/r/20210927084615.1938432-1-anders.roxell@linaro.org Fixes: e88e2d32200a ("scsi: ufs: core: Probe for temperature notification support") Also-reported-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested Acked-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Anders Roxell <anders.roxell@linaro.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-09-28scsi: ufs: exynos: Unify namingKrzysztof Kozlowski
Use "Samsung" and "Exynos", not the uppercase versions. Link: https://lore.kernel.org/r/20210924132658.109814-2-krzysztof.kozlowski@canonical.com Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-09-28scsi: ufs: Fix illegal offset in UPIU event traceJonathan Hsu
Fix incorrect index for UTMRD reference in ufshcd_add_tm_upiu_trace(). Link: https://lore.kernel.org/r/20210924085848.25500-1-jonathan.hsu@mediatek.com Fixes: 4b42d557a8ad ("scsi: ufs: core: Fix wrong Task Tag used in task management request UPIUs") Cc: stable@vger.kernel.org Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Jonathan Hsu <jonathan.hsu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-09-22scsi: ufs: core: Add temperature notification exception handlingAvri Altman
The device may notify the host of an extreme temperature by using the exception event mechanism. The exception can be raised when the device’s Tcase temperature is either too high or too low. It is essentially up to the platform to decide what further actions need to be taken. leave a placeholder for a designated vop for that. Link: https://lore.kernel.org/r/20210915060407.40-3-avri.altman@wdc.com Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Daejun Park <daejun7.park@samsung.com> Signed-off-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-09-22scsi: ufs: core: Probe for temperature notification supportAvri Altman
Probe the dExtendedUFSFeaturesSupport register for the device's temperature notification support and, if supported, add a hardware monitor device. Link: https://lore.kernel.org/r/20210915060407.40-2-avri.altman@wdc.com Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Daejun Park <daejun7.park@samsung.com> Signed-off-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-09-21scsi: ufs: core: Unbreak the reset handlerBart Van Assche
A command tag is passed as the second argument of the __ufshcd_transfer_req_compl() call in ufshcd_eh_device_reset_handler() instead of a bitmask. Fix this by passing a bitmask as argument instead of a command tag. Link: https://lore.kernel.org/r/20210916175408.2260084-1-bvanassche@acm.org Fixes: a45f937110fa ("scsi: ufs: Optimize host lock on transfer requests send/compl paths") Cc: Can Guo <cang@codeaurora.org> 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>
2021-09-21scsi: ufs: core: Revert "scsi: ufs: Synchronize SCSI and UFS error handling"Adrian Hunter
This reverts commit a113eaaf86373362b053279049907ff82b5df6c8. There are a couple of issues with the commit: 1. It causes deadlocks. 2. It causes the shost->eh_cmd_q list of failed requests not to be processed, ever. So revert it. 1. Deadlocks The SCSI error handler runs with requests blocked beginning when scsi_schedule_eh() sets SHOST_RECOVERY state, continuing through scsi_error_handler() callback ->eh_strategy_handler() until scsi_restart_operations() is called. By setting eh_strategy_handler to ufshcd_err_handler, the patch changed the UFS error handler to run with requests blocked, including PM requests, for the entire run of the error handler. That conflicts with UFS error handler existing synchronization with UFS device PM operations. The UFS error handler synchronizes with runtime PM by doing pm_runtime_get_sync() prior to blocking requests itself. It synchronizes with system PM by use of hba->host_sem, again before blocking requests itself. However, if requests are already blocked, then PM operations will block. So: the UFS error handler blocks waiting on PM + PM blocks waiting on SCSI PM requests to process or fail + PM requests are blocked waiting on error handling to finish = deadlock This happens both for runtime PM and system PM. Prior to the patch, these deadlocks could not happen even if SCSI error handling was running, because the presence of requests in shost->eh_cmd_q would mean the queues could not be suspended, which would mean that, should the UFS error handler run at the same time, it would not need to wait for PM or vice versa. Please note these scenarios are not just theoretical, they were found during testing on a Samsung Galaxy Book S. 2. ->eh_strategy_handler() must process shost->eh_cmd_q list of failed requests, as all other eh_strategy_handler's do except UFS error handler. Refer for example: scsi_unjam_host(), ata_scsi_error() and sas_scsi_recover_host(). Link: https://lore.kernel.org/r/20210917144349.14058-1-adrian.hunter@intel.com Fixes: a113eaaf8637 ("scsi: ufs: Synchronize SCSI and UFS error handling") Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-09-14scsi: ufs: ufs-mediatek: Change dbg select by check IP versionPeter Wang
Mediatek UFS dbg select setting is changed in new IP version. Check the IP version before setting dbg select. Link: https://lore.kernel.org/r/1630918387-8333-1-git-send-email-peter.wang@mediatek.com Signed-off-by: Peter Wang <peter.wang@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
generated by cgit (git 2.34.1) at 2024-06-12 19:17:13 +0000