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* scsi: ufs-bsg: Fix runtime PM imbalance on errorDinghao Liu2020-06-151-1/+3
| | | | | | | | | | | When ufs_bsg_alloc_desc_buffer() returns an error code, a pairing runtime PM usage counter decrement is needed to keep the counter balanced. Link: https://lore.kernel.org/r/20200522045932.31795-1-dinghao.liu@zju.edu.cn Fixes: 74e5e468b664 (scsi: ufs-bsg: Wake the device before sending raw upiu commands) Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* Merge tag 'kbuild-v5.8-2' of ↵Linus Torvalds2020-06-131-6/+6
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull more Kbuild updates from Masahiro Yamada: - fix build rules in binderfs sample - fix build errors when Kbuild recurses to the top Makefile - covert '---help---' in Kconfig to 'help' * tag 'kbuild-v5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: treewide: replace '---help---' in Kconfig files with 'help' kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables samples: binderfs: really compile this sample and fix build issues
| * treewide: replace '---help---' in Kconfig files with 'help'Masahiro Yamada2020-06-141-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit 84af7a6194e4 ("checkpatch: kconfig: prefer 'help' over '---help---'"), the number of '---help---' has been gradually decreasing, but there are still more than 2400 instances. This commit finishes the conversion. While I touched the lines, I also fixed the indentation. There are a variety of indentation styles found. a) 4 spaces + '---help---' b) 7 spaces + '---help---' c) 8 spaces + '---help---' d) 1 space + 1 tab + '---help---' e) 1 tab + '---help---' (correct indentation) f) 1 tab + 1 space + '---help---' g) 1 tab + 2 spaces + '---help---' In order to convert all of them to 1 tab + 'help', I ran the following commend: $ find . -name 'Kconfig*' | xargs sed -i 's/^[[:space:]]*---help---/\thelp/' Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
* | scsi: ufs: Remove redundant urgent_bkop_lvl initializationStanley Chu2020-06-021-4/+1
| | | | | | | | | | | | | | | | | | | | | | | | In ufshcd_probe_hba(), all BKOP SW tracking variables can be reset together in ufshcd_force_reset_auto_bkops(), thus urgent_bkop_lvl initialization in the beginning of ufshcd_probe_hba() can be merged into ufshcd_force_reset_auto_bkops(). Link: https://lore.kernel.org/r/20200530141200.4616-1-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>
* | scsi: ufs: Don't update urgent bkops level when toggling auto bkopsCan Guo2020-06-021-1/+0
|/ | | | | | | | | | | | | | | Urgent bkops level is used to compare against actual bkops status read from UFS device. Urgent bkops level is set during initialization and might be updated in exception event handler during runtime. But it should not be updated to the actual bkops status every time when auto bkops is toggled. Otherwise, if urgent bkops level is updated to 0, auto bkops shall always be kept enabled. Link: https://lore.kernel.org/r/1590632686-17866-1-git-send-email-cang@codeaurora.org Fixes: 24366c2afbb0 ("scsi: ufs: Recheck bkops level if bkops is disabled") 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>
* scsi: ufs: ti-j721e-ufs: Fix unwinding of pm_runtime changesVignesh Raghavendra2020-05-261-3/+10
| | | | | | | | | | | Fix unwinding of pm_runtime changes when bailing out of driver probe due to a failure and also on removal of driver. Link: https://lore.kernel.org/r/20200526100340.15032-1-vigneshr@ti.com Fixes: 6979e56cec97 ("scsi: ufs: Add driver for TI wrapper for Cadence UFS IP") Reported-by: Dinghao Liu <dinghao.liu@zju.edu.cn> Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: Fix WriteBooster flush during runtime suspendStanley Chu2020-05-263-23/+59
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently UFS host driver promises VCC supply if UFS device needs to do WriteBooster flush during runtime suspend. However the UFS specification mentions: "While the flushing operation is in progress, the device is in Active power mode." Therefore UFS host driver needs to promise more: Keep UFS device as "Active power mode", otherwise UFS device shall not do any flush if device enters Sleep or PowerDown power mode. Similarly, the same promises shall be applied if device needs urgent BKOP during runtime suspend. Fix this by not changing device power mode if WriteBooster flush or urgent BKOP is required in ufshcd_suspend(). Now, if device finishes its job but is not resumed for a very long time, system will have unnecessary power drain because VCC is still supplied. A method to re-check the threshold of keeping VCC supply is required to fix the power drain. However, the threshold re-check needs to re-activate the link first because the decision depends on the latest device status. Also introduce a delayed work to force runtime resume after a certain delay during runtime suspend. This makes threshold re-check happen natually in the entry of the next runtime-suspend. The device can continue its WriteBooster flush or urgent BKOP jobs soon after resumed if device has no upcoming requests and link enters hibern8 state either by Auto-Hibern8 or hibern8 during clk-gating scheme. This solution not only prevents power drain but also makes as much use of time as possible for device's background jobs. Link: https://lore.kernel.org/r/20200522083212.4008-5-stanley.chu@mediatek.com Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: Fix index of attributes query for WriteBooster featureStanley Chu2020-05-263-9/+22
| | | | | | | | | | | For WriteBooster feature related attributes, the index used by query shall be LUN ID if LU Dedicated buffer mode is enabled. Link: https://lore.kernel.org/r/20200522083212.4008-4-stanley.chu@mediatek.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: Allow WriteBooster on UFS 2.2 devicesStanley Chu2020-05-261-0/+1
| | | | | | | | | | | | | | | According to the UFS specification, WriteBooster is officially supported by UFS 2.2. Since UFS 2.2 specification has been finalized in JEDEC and such devices have also showed up in the market, modify the checking rule for ufshcd_wb_probe() to allow these devices to enable WriteBooster. Link: https://lore.kernel.org/r/20200522083212.4008-3-stanley.chu@mediatek.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: Remove unnecessary memset for dev_infoStanley Chu2020-05-261-3/+0
| | | | | | | | | | | | | | The whole UFS host instance has been zero-initialized by scsi_host_alloc(), thus UFS driver does not need to clear "dev_info" member specifically in ufshcd_device_params_init(). Simply remove the unnecessary code. Link: https://lore.kernel.org/r/20200522083212.4008-2-stanley.chu@mediatek.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs-qcom: Fix scheduling while atomic issueJeffrey Hugo2020-05-261-3/+3
| | | | | | | | | | | | | | | | | | | | | ufs_qcom_dump_dbg_regs() uses usleep_range, a sleeping function, but can be called from atomic context in the following flow: ufshcd_intr -> ufshcd_sl_intr -> ufshcd_check_errors -> ufshcd_print_host_regs -> ufshcd_vops_dbg_register_dump -> ufs_qcom_dump_dbg_regs This causes a boot crash on the Lenovo Miix 630 when the interrupt is handled on the idle thread. Fix the issue by switching to udelay(). Link: https://lore.kernel.org/r/20200525204125.46171-1-jeffrey.l.hugo@gmail.com Fixes: 9c46b8676271 ("scsi: ufs-qcom: dump additional testbus registers") Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: Make ufshcd_wait_for_register() sleep instead of busy-waitingBart Van Assche2020-05-192-24/+29
| | | | | | | | | | | | | | | | | | | | | | | The ufshcd_wait_for_register() function either sleeps or spins until the specified register has reached the desired value. Busy-waiting is not only considered a bad practice but also has a bad impact on energy consumption. Always sleep instead of spinning by making sure that all ufshcd_wait_for_register() calls happen from a context where it is allowed to sleep. The only function call that has to be moved is the ufshcd_hba_stop() call in ufshcd_host_reset_and_restore(). Link: https://lore.kernel.org/r/20200507222750.19113-1-bvanassche@acm.org Cc: Can Guo <cang@codeaurora.org> Cc: Avri Altman <avri.altman@wdc.com> Cc: Bean Huo <beanhuo@micron.com> Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: Asutosh Das <asutoshd@codeaurora.org> Tested-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs-mediatek: Customize WriteBooster flush policyStanley Chu2020-05-141-0/+1
| | | | | | | | | | Change the WriteBooster policy to keep VCC on during runtime suspend if available WriteBooster buffer is less than 80%. Link: https://lore.kernel.org/r/20200509093716.21010-5-stanley.chu@mediatek.com Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: Customize flush threshold for WriteBoosterStanley Chu2020-05-143-7/+6
| | | | | | | | | | | | | Allow flush threshold for WriteBooster to be customizable by vendors. To achieve this, make the value a variable in struct ufs_hba_variant_params. Also introduce UFS_WB_BUF_REMAIN_PERCENT() macro to provide a more flexible way to specify WriteBooster available buffer values. Link: https://lore.kernel.org/r/20200509093716.21010-4-stanley.chu@mediatek.com Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: Introduce ufs_hba_variant_params to group customizable parametersStanley Chu2020-05-143-26/+24
| | | | | | | | | | The UFS driver is growing more and more customizable parameters. Collect them in one place. Link: https://lore.kernel.org/r/20200509093716.21010-2-stanley.chu@mediatek.com Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs-mediatek: Make ufs_mtk_fixup_dev_quirks staticChenTao2020-05-141-1/+1
| | | | | | | | | | | | | Fix the following warning: drivers/scsi/ufs/ufs-mediatek.c:585:6: warning: symbol 'ufs_mtk_fixup_dev_quirks' was not declared. Should it be static? Link: https://lore.kernel.org/r/20200514012655.127202-1-chentao107@huawei.com Reported-by: Hulk Robot <hulkci@huawei.com> Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: ChenTao <chentao107@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: Cleanup WriteBooster featureStanley Chu2020-05-111-13/+7
| | | | | | | | | | | | | | | | | | Small cleanup as below items, 1. Use ufshcd_is_wb_allowed() directly instead of ufshcd_wb_sup() since ufshcd_wb_sup() just returns the result of ufshcd_is_wb_allowed(). 2. In ufshcd_suspend(), "else if (!ufshcd_is_runtime_pm(pm_op)) can be simplified to "else" since both have the same meaning. This patch does not change any functionality. Link: https://lore.kernel.org/r/20200508080115.24233-9-stanley.chu@mediatek.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs-mediatek: Enable WriteBooster capabilityStanley Chu2020-05-111-0/+3
| | | | | | | | | | | Enable WriteBooster capability on MediaTek UFS platforms. Link: https://lore.kernel.org/r/20200508080115.24233-8-stanley.chu@mediatek.com Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: Add LU Dedicated buffer mode support for WriteBoosterStanley Chu2020-05-114-12/+66
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | According to UFS specification, there are two WriteBooster mode of operations: "LU dedicated buffer" mode and "shared buffer" mode. In the "LU dedicated buffer" mode, the WriteBooster Buffer is dedicated to a logical unit. If the device supports the "LU dedicated buffer" mode, this mode is configured by setting bWriteBoosterBufferType to 00h. The logical unit WriteBooster Buffer size is configured by setting the dLUNumWriteBoosterBufferAllocUnits field of the related Unit Descriptor. Only a value greater than zero enables the WriteBooster feature in the logical unit. Modify ufshcd_wb_probe() as above description to support LU Dedicated buffer mode. Note that according to UFS 3.1 specification, the valid value of bDeviceMaxWriteBoosterLUs parameter in Geometry Descriptor is 1, which means at most one LUN can have WriteBooster buffer in "LU dedicated buffer mode". Therefore this patch supports only one LUN with WriteBooster enabled. All WriteBooster related sysfs nodes are specifically mapped to the LUN with WriteBooster enabled in LU Dedicated buffer mode. Link: https://lore.kernel.org/r/20200508080115.24233-7-stanley.chu@mediatek.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: Add "index" in parameter list of ufshcd_query_flag()Stanley Chu2020-05-113-15/+17
| | | | | | | | | | | | | | For preparation of LU Dedicated buffer mode support on WriteBooster feature, "index" parameter shall be added and allowed to be specified by callers. Link: https://lore.kernel.org/r/20200508080115.24233-6-stanley.chu@mediatek.com Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Can Guo <cang@codeaurora.org> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs-mediatek: Add fixup_dev_quirks vopsStanley Chu2020-05-111-3/+19
| | | | | | | | | | | Add fixup_dev_quirk vops in MediaTek UFS platforms and provide an initial vendor-specific device quirk table. Link: https://lore.kernel.org/r/20200508080115.24233-5-stanley.chu@mediatek.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: Export ufs_fixup_device_setup() functionStanley Chu2020-05-112-3/+8
| | | | | | | | | | | Export ufs_fixup_device_setup() to allow vendors to re-use it for fixing device quriks on specified UFS hosts. Link: https://lore.kernel.org/r/20200508080115.24233-4-stanley.chu@mediatek.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: Introduce fixup_dev_quirks vopsStanley Chu2020-05-112-2/+18
| | | | | | | | | | | | | | | | Some UFS deivces may have required device quirks or have non-standard features which are enabled only on specified UFS hosts or for special customers. To not "pollute" common device quirk list, i.e. ufs_fixups table, for those devices mentioned above, introduce "fixup_dev_quirks" vops to allow vendors to fix or modify device quirks accordingly. Link: https://lore.kernel.org/r/20200508080115.24233-3-stanley.chu@mediatek.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: Enable WriteBooster on some pre-3.1 UFS devicesStanley Chu2020-05-112-25/+49
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The WriteBooster feature can be supported by some pre-3.1 UFS devices by upgrading firmware. To enable WriteBooster feature in such devices, introduce a device quirk to relax the entrance condition of ufshcd_wb_probe() to allow host driver to check those devices' WriteBooster capability. WriteBooster feature can be available if below all conditions are satisfied, 1. Host enables WriteBooster capability 2. UFS 3.1 device or UFS pre-3.1 device with quirk UFS_DEVICE_QUIRK_SUPPORT_EXTENDED_FEATURES enabled 3. The device descriptor shall have DEVICE_DESC_PARAM_EXT_UFS_FEATURE_SUP field 4. WriteBooster support is specified in above field Link: https://lore.kernel.org/r/20200508080115.24233-2-stanley.chu@mediatek.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: Replace zero-length array with flexible-arrayGustavo A. R. Silva2020-05-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current codebase makes use of the zero-length array language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as these ones is a flexible array member[1][2], introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being inadvertently introduced[3] to the codebase from now on. Also, notice that, dynamic memory allocations won't be affected by this change: "Flexible array members have incomplete type, and so the sizeof operator may not be applied. As a quirk of the original implementation of zero-length arrays, sizeof evaluates to zero."[1] sizeof(flexible-array-member) triggers a warning because flexible array members have incomplete type[1]. There are some instances of code in which the sizeof operator is being incorrectly/erroneously applied to zero-length arrays and the result is zero. Such instances may be hiding some bugs. So, this work (flexible-array member conversions) will also help to get completely rid of those sorts of issues. This issue was found with the help of Coccinelle. [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [2] https://github.com/KSPP/linux/issues/21 [3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour") Link: https://lore.kernel.org/r/20200507192550.GA16683@embeddedor Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs-qcom: Configure write booster typeAsutosh Das2020-04-271-0/+1
| | | | | | | | | Enable WriteBooster for Qualcomm platform. Link: https://lore.kernel.org/r/cd4cf745ea0b3a59c2075036e17316b97494fe65.1587591527.git.asutoshd@codeaurora.org Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: sysfs: Add sysfs entries for write boosterAsutosh Das2020-04-272-1/+43
| | | | | | | | | | Adds unit, device, geometry descriptor sysfs entries. Adds flags sysfs entries for write booster. Link: https://lore.kernel.org/r/98987ef17844292bd42c57613990a3a26c6de2b8.1587591527.git.asutoshd@codeaurora.org Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: Add write booster feature supportAsutosh Das2020-04-273-6/+291
| | | | | | | | | | | | | | | | | | | | | | | The write performance of TLC NAND is considerably lower than SLC NAND. Using SLC NAND as a WriteBooster Buffer enables the write request to be processed with lower latency and improves the overall write performance. Adds support for shared-buffer mode WriteBooster. WriteBooster enable: SW enables it when clocks are scaled up, thus it's enabled only in high load conditions. WriteBooster disable: SW will disable the feature, when clocks are scaled down. Thus writes would go as normal writes. To keep the endurance of the WriteBooster Buffer at a maximum, this load-based toggling is adopted. Link: https://lore.kernel.org/r/2871444d9083b0e9323ef6d8ff1b544b7784adc9.1587591527.git.asutoshd@codeaurora.org Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: Use true for bool variables in ufshcd_complete_dev_init()Jason Yan2020-04-271-1/+1
| | | | | | | | | | | Fix the following coccicheck warning: drivers/scsi/ufs/ufshcd.c:4140:6-14: WARNING: Assignment of 0/1 to bool variable. Link: https://lore.kernel.org/r/20200426094305.24083-1-yanaijie@huawei.com Signed-off-by: Jason Yan <yanaijie@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs-qcom: remove unneeded variable 'ret'Jason Yan2020-04-221-2/+1
| | | | | | | | | | | | | Fix the following coccicheck warning: drivers/scsi/ufs/ufs-qcom.c:575:5-8: Unneeded variable: "ret". Return "0" on line 590 Link: https://lore.kernel.org/r/20200418070625.11756-1-yanaijie@huawei.com Reported-by: Hulk Robot <hulkci@huawei.com> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Jason Yan <yanaijie@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* scsi: ufs: full reinit upon resume if link was offAsutosh Das2020-04-171-2/+6
| | | | | | | | | | | | | | | | During suspend, if the link is put to off, it would require a full initialization during resume. This patch resets and restores both the host and the card during initialization, otherwise host-only reset and restore would fail occasionally. Link: https://lore.kernel.org/r/1586844892-22720-1-git-send-email-cang@codeaurora.org Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Acked-by: Stanley Chu <stanley.chu@mediatek.com> Acked-by: Avri Altman <Avri.Altman@wdc.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>
* Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds2020-04-103-41/+74
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull more SCSI updates from James Bottomley: "This is a batch of changes that didn't make it in the initial pull request because the lpfc series had to be rebased to redo an incorrect split. It's basically driver updates to lpfc, target, bnx2fc and ufs with the rest being minor updates except the sr_block_release one which fixes a use after free introduced by the removal of the global mutex in the first patch set" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (35 commits) scsi: core: Add DID_ALLOC_FAILURE and DID_MEDIUM_ERROR to hostbyte_table scsi: ufs: Use ufshcd_config_pwr_mode() when scaling gear scsi: bnx2fc: fix boolreturn.cocci warnings scsi: zfcp: use fallthrough; scsi: aacraid: do not overwrite retval in aac_reset_adapter() scsi: sr: Fix sr_block_release() scsi: aic7xxx: Remove more FreeBSD-specific code scsi: mpt3sas: Fix kernel panic observed on soft HBA unplug scsi: ufs: set device as active power mode after resetting device scsi: iscsi: Report unbind session event when the target has been removed scsi: lpfc: Change default SCSI LUN QD to 64 scsi: libfc: rport state move to PLOGI if all PRLI retry exhausted scsi: libfc: If PRLI rejected, move rport to PLOGI state scsi: bnx2fc: Update the driver version to 2.12.13 scsi: bnx2fc: Fix SCSI command completion after cleanup is posted scsi: bnx2fc: Process the RQE with CQE in interrupt context scsi: target: use the stack for XCOPY passthrough cmds scsi: target: increase XCOPY I/O size scsi: target: avoid per-loop XCOPY buffer allocations scsi: target: drop xcopy DISK BLOCK LENGTH debug ...
| * scsi: ufs: Use ufshcd_config_pwr_mode() when scaling gearCan Guo2020-04-011-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | When scaling gear, use ufshcd_config_pwr_mode() instead of ufshcd_change_power_mode() so that vops_pwr_change_notify(PRE_CHANGE) can be utilized to allow vendors use customized settings before changing power mode. Link: https://lore.kernel.org/r/1581485910-8307-2-git-send-email-cang@codeaurora.org Reviewed-by: Avri Altman <avri.altman@wdc.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>
| * scsi: ufs: set device as active power mode after resetting deviceStanley Chu2020-03-312-13/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently ufshcd driver assumes that bInitPowerMode parameter is not changed by any vendors thus device power mode can be set as "Active" during initialization. According to UFS JEDEC specification, device power mode shall be "Active" after HW Reset is triggered if the bInitPowerMode parameter in Device Descriptor is default value. By above description, we can set device power mode as "Active" after device reset is triggered by vendor's callback. With this change, the link startup performance can be improved in some cases by not setting link_startup_again as true in ufshcd_link_startup(). Link: https://lore.kernel.org/r/20200327095835.10293-1-stanley.chu@mediatek.com Reviewed-by: Can Guo <cang@codeaurora.org> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| * scsi: ufs-mediatek: add error recovery for suspend and resumeStanley Chu2020-03-291-2/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Once fail happens during suspend and resume flow if the desired low power link state is H8, link recovery is required for MediaTek UFS controller. For resume flow, since power and clocks are already enabled before invoking vendor's resume callback, simply using ufshcd_link_recovery() inside callback is fine. For suspend flow, the device power enters low power mode or is disabled before suspend callback, thus ufshcd_link_recovery() can not be directly used in vendor callback. One solution is to set the link to off state and then ufshcd_host_reset_and_restore() will be executed by ufshcd_suspend(). Link: https://lore.kernel.org/r/20200327095329.10083-3-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>
| * scsi: ufs: export ufshcd_link_recoveryStanley Chu2020-03-292-1/+3
| | | | | | | | | | | | | | | | | | | | Export ufshcd_link_recovery to allow vendors to recover failed link in vendor's callbacks. Link: https://lore.kernel.org/r/20200327095329.10083-2-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>
| * scsi: ufs: Clean up ufshcd_scale_clks() and clock scaling error out pathSubhash Jadavani2020-03-291-21/+44
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change introduces a func ufshcd_set_clk_freq() to explicitly set clock frequency so that it can be used in reset_and_restore path and in ufshcd_scale_clks(). This change also cleans up the clock scaling error out path. [mkp: commit desc] Link: https://lore.kernel.org/r/1585214742-5466-2-git-send-email-cang@codeaurora.org Fixes: a3cd5ec55f6c ("scsi: ufs: add load based scaling of UFS gear") Reviewed-by: Bean Huo <beanhuo@micron.com> Acked-by: Avri Altman <Avri.Altman@wdc.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>
* | Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds2020-04-0213-346/+570
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull SCSI updates from James Bottomley: "This series has a huge amount of churn because it pulls in Mauro's doc update changing all our txt files to rst ones. Excluding that, we have the usual driver updates (qla2xxx, ufs, lpfc, zfcp, ibmvfc, pm80xx, aacraid), a treewide update for scnprintf and some other minor updates. The major core change is Hannes moving functions out of the aacraid driver and into the core" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (223 commits) scsi: aic7xxx: aic97xx: Remove FreeBSD-specific code scsi: ufs: Do not rely on prefetched data scsi: dc395x: remove dc395x_bios_param scsi: libiscsi: Fix error count for active session scsi: hpsa: correct race condition in offload enabled scsi: message: fusion: Replace zero-length array with flexible-array member scsi: qedi: Add PCI shutdown handler support scsi: qedi: Add MFW error recovery process scsi: ufs: Enable block layer runtime PM for well-known logical units scsi: ufs-qcom: Override devfreq parameters scsi: ufshcd: Let vendor override devfreq parameters scsi: ufshcd: Update the set frequency to devfreq scsi: ufs: Resume ufs host before accessing ufs device scsi: ufs-mediatek: customize the delay for enabling host scsi: ufs: make HCE polling more compact to improve initialization latency scsi: ufs: allow custom delay prior to host enabling scsi: ufs-mediatek: use common delay function scsi: ufs: introduce common and flexible delay function scsi: ufs: use an enum for host capabilities scsi: ufs: fix uninitialized tx_lanes in ufshcd_disable_tx_lcc() ...
| * scsi: ufs: Do not rely on prefetched dataCan Guo2020-03-262-22/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We were setting bActiveICCLevel attribute for UFS device only once but the type of this attribute has changed from persistent to volatile since UFS device specification v2.1. This attribute is set to the default value after power cycle or hardware reset event. It isn't safe to rely on prefetched data (only used for bActiveICCLevel attribute now). Hence this change removes the code related to data prefetching and set this parameter on every attempt to probe the UFS device. Tested-by: Stanley Chu <stanley.chu@mediatek.com> Reviewed-by: Stanley Chu <stanley.chu@mediatek.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>
| * scsi: ufs: Enable block layer runtime PM for well-known logical unitsCan Guo2020-03-261-2/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Block layer RPM is enabled for the genernal UFS SCSI devices when they are probed by their driver. However block layer RPM is not enabled for UFS well-known SCSI devices. As UFS SCSI devices have their corresponding BSG char devices, accessing a BSG char device via IOCTL may send requests to its corresponding SCSI device through its request queue. If BSG IOCTL sends a request to a well-known SCSI device when HBA is not runtime active, due to block layer RPM not being enabled for the well-known SCSI devices, the HBA, which is at the top of a SCSI device's parent chain, will not be resumed. This change enables block layer RPM for the well-known SCSI devices so that block layer can handle RPM for the well-known SCSI devices just like for the general SCSI devices. Reviewed-by: Avri Altman <avri.altman@wdc.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>
| * scsi: ufs-qcom: Override devfreq parametersAsutosh Das2020-03-261-0/+25
| | | | | | | | | | | | | | | | | | Override devfreq parameters for power-performance trade-off. Link: https://lore.kernel.org/r/b6875729b6072134985c9113a820cf60a2af22e7.1585160616.git.asutoshd@codeaurora.org Acked-by: Avri Altman <Avri.Altman@wdc.com> Signed-off-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| * scsi: ufshcd: Let vendor override devfreq parametersAsutosh Das2020-03-262-1/+26
| | | | | | | | | | | | | | | | | | | | Vendor drivers may have a need to update the polling interval and thresholds. Provide a vops for vendor drivers to use. Link: https://lore.kernel.org/r/acd79e00396cff855256adad47f615ccdbde85ac.1585160616.git.asutoshd@codeaurora.org Acked-by: Avri Altman <Avri.Altman@wdc.com> Signed-off-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| * scsi: ufshcd: Update the set frequency to devfreqAsutosh Das2020-03-261-1/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | Currently, the frequency that devfreq provides the driver always leads the clocks to be scaled up. Hence, round the clock-rate to the nearest frequency before deciding to scale. Also update the devfreq statistics of current frequency. Link: https://lore.kernel.org/r/d0c6c22455811e9f0eda01f9bc70d1398b51b2bd.1585160616.git.asutoshd@codeaurora.org Acked-by: Avri Altman <Avri.Altman@wdc.com> Signed-off-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| * scsi: ufs: Resume ufs host before accessing ufs deviceNitin Rawat2020-03-261-6/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | As a part of sysfs reading of descriptors/attributes/flags, query commands should only be executed when hba's power runtime status is active. To guarantee this, add pm_runtime_get/put_sync() to those paths where query commands are sent. Link: https://lore.kernel.org/r/f712a4f7bdb0ae32e0d83634731e7aaa1b3a6cdd.1585009663.git.asutoshd@codeaurora.org Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Nitin Rawat <nitirawa@codeaurora.org> Signed-off-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| * scsi: ufs-mediatek: customize the delay for enabling hostStanley Chu2020-03-262-9/+35
| | | | | | | | | | | | | | | | | | | | | | | | | | MediaTek platform and UFS controller can dynamically customize the delay for host enabling according to different scenarios. For example, if UniPro enters lower-power mode, such delay can be minimized, otherwise longer delay shall be expected. Link: https://lore.kernel.org/r/20200318104016.28049-8-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>
| * scsi: ufs: make HCE polling more compact to improve initialization latencyStanley Chu2020-03-261-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reduce the waiting period between each HCE (Host Controller Enable) polling from 5 ms to 1 ms. Also increase the maximum polling times to make "total polling time" roughly the same. This change could make HCE initialization faster to improve latency of ufshcd initialization, error recovery, and resume behaviors. Link: https://lore.kernel.org/r/20200318104016.28049-7-stanley.chu@mediatek.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Can Guo <cang@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| * scsi: ufs: allow custom delay prior to host enablingStanley Chu2020-03-262-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | Currently a 1 ms delay is applied before polling CONTROLLER_ENABLE bit. This delay may not be required or can be changed in different controllers. Make the delay as a changeable value in struct ufs_hba to allow it customized by vendors. Link: https://lore.kernel.org/r/20200318104016.28049-6-stanley.chu@mediatek.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Can Guo <cang@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| * scsi: ufs-mediatek: use common delay functionStanley Chu2020-03-261-13/+2
| | | | | | | | | | | | | | | | | | | | A common delay function is introduced in UFS core driver, thus ufs-mediatek can use it instead of the private delay function. Link: https://lore.kernel.org/r/20200318104016.28049-5-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>
| * scsi: ufs: introduce common and flexible delay functionStanley Chu2020-03-262-0/+13
| | | | | | | | | | | | | | | | | | | | | | | | Introduce a common delay function to provide flexible way for users to take choices of udelay and usleep_range into consideration according to the required delay time. Link: https://lore.kernel.org/r/20200318104016.28049-4-stanley.chu@mediatek.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Can Guo <cang@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| * scsi: ufs: use an enum for host capabilitiesStanley Chu2020-03-261-28/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | Use an enum to specify the host capabilities instead of #defines inside the structure definition. Link: https://lore.kernel.org/r/20200318104016.28049-3-stanley.chu@mediatek.com Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Can Guo <cang@codeaurora.org> Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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