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path: root/drivers/scsi/ufs
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2020-02-12scsi: ufs: Add dev ref clock gating wait time supportCan Guo
In UFS version 3.0, a newly added attribute bRefClkGatingWaitTime defines the minimum time for which the reference clock is required by device during transition to LS-MODE or HIBERN8 state. Make this change to reflect the new requirement by adding delays before turning off the clock. Link: https://lore.kernel.org/r/1581392451-28743-7-git-send-email-cang@codeaurora.org Reviewed-by: Asutosh Das <asutoshd@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>
2020-02-12scsi: ufs: Fix ufshcd_hold() caused scheduling while atomicCan Guo
The async version of ufshcd_hold(async == true), which is only called in queuecommand path as for now, is expected to work in atomic context, thus it should not sleep or schedule out. When it runs into the condition that clocks are ON but link is still in hibern8 state, it should bail out without flushing the clock ungate work. Fixes: f2a785ac2312 ("scsi: ufshcd: Fix race between clk scaling and ungate work") Link: https://lore.kernel.org/r/1581392451-28743-6-git-send-email-cang@codeaurora.org Reviewed-by: Hongwu Su <hongwus@codeaurora.org> Reviewed-by: Asutosh Das <asutoshd@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>
2020-02-12scsi: ufs: Remove the check before call setup clock notify vopsCan Guo
The functionality of vendor specific ops should be handled properly in platform specific driver, but should not count on the UFS driver. Link: https://lore.kernel.org/r/1581392451-28743-5-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>
2020-02-12scsi: ufs-qcom: Adjust bus bandwidth voting and unvotingCan Guo
The bus bandwidth voting is required to be done before the bus clocks are enabled, and the unvoting is required to be done only after the bus clocks are disabled. Link: https://lore.kernel.org/r/1581392451-28743-4-git-send-email-cang@codeaurora.org Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Reviewed-by: Hongwu Su <hongwus@codeaurora.org> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-02-12scsi: ufs: set load before setting voltage in regulatorsAsutosh Das
This sequence change is required to avoid dips in voltage during boot-up. Apparently, this dip is caused because in the original sequence, the regulators are initialized in lpm mode. And then when the load is set to high, and more current is drawn, than is allowed in lpm, the dip is seen. Link: https://lore.kernel.org/r/1581392451-28743-3-git-send-email-cang@codeaurora.org Reviewed-by: Hongwu Su <hongwus@codeaurora.org> Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Stanley Chu <stanley.chu@mediatek.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>
2020-02-12scsi: ufs: Flush exception event before suspendSayali Lokhande
Exception event can be raised by the device when system suspend is in progress. This will result in unclocked register access in exception event handler as clocks will be turned off during suspend. This change makes sure to flush exception event handler work in suspend before disabling clocks to avoid unclocked register access issue. Link: https://lore.kernel.org/r/1581392451-28743-2-git-send-email-cang@codeaurora.org Reviewed-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Sayali Lokhande <sayalil@codeaurora.org> 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>
2020-02-12scsi: ufs: Select INITIAL ADAPT type for HS Gear4Can Guo
ADAPT is added specifically for HS Gear4 mode only. Select INITIAL ADAPT before power mode change to G4 and select NO ADAPT before switch to non-G4 modes. [mkp: fixed typo in header file] Link: https://lore.kernel.org/r/1581485910-8307-3-git-send-email-cang@codeaurora.org Signed-off-by: Can Guo <cang@codeaurora.org> Reviewed-by: Avri Altman <avri.altman@wdc.com> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-02-12scsi: ufs: introduce common function to disable host TX LCCStanley Chu
Many vendors would like to disable host TX LCC during initialization flow. Introduce a common function for all users to make drivers easier to read and maintained. This patch does not change any functionality. Link: https://lore.kernel.org/r/20200207070357.17169-3-stanley.chu@mediatek.com Reviewed-by: Can Guo <cang@codeaurora.org> 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>
2020-02-12scsi: ufs: ufs-mediatek: fix TX LCC disabling timingStanley Chu
MediaTek UFS host requires TX LCC to be disabled on both host and device sides. This can be done by disabling host's local TX LCC before link startup. Correct TX LCC disabling timing in MediaTek UFS driver. Link: https://lore.kernel.org/r/20200207070357.17169-2-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>
2020-02-10scsi: ufs: ufs-mediatek: gate ref-clk during Auto-Hibern8Stanley Chu
In current UFS driver design, hba->uic_link_state will not be changed after link enters Hibern8 state by Auto-Hibern8 mechanism. In this case, reference clock gating will be skipped unless special handling is implemented in vendor's callbacks. Support reference clock gating during Auto-Hibern8 period in MediaTek Chipsets: If link state is already in Hibern8 while Auto-Hibern8 feature is enabled, gate reference clock in setup_clocks callback. Link: https://lore.kernel.org/r/20200129105251.12466-5-stanley.chu@mediatek.com Reviewed-by: Alim Akhtar <alim.akhtar@samsung.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>
2020-02-10scsi: ufs: fix Auto-Hibern8 error detectionStanley Chu
Auto-Hibern8 may be disabled by some vendors or sysfs in runtime even if Auto-Hibern8 capability is supported by host. If Auto-Hibern8 capability is supported by host but not actually enabled, Auto-Hibern8 error shall not happen. To fix this, provide a way to detect if Auto-Hibern8 is actually enabled first, and bypass Auto-Hibern8 disabling case in ufshcd_is_auto_hibern8_error(). Fixes: 821744403913 ("scsi: ufs: Add error-handling of Auto-Hibernate") Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20200129105251.12466-4-stanley.chu@mediatek.com Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> 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>
2020-02-10scsi: ufs: ufs-mediatek: support linkoff state during suspendStanley Chu
If system suspend or runtime suspend mode is configured as linkoff state, phy can be powered off and reference clock can be gated in MediaTek Chipsets. At the same time, remove redundant reference clock control in suspend and resume callbacks because such control can be well-handled in setup_clocks callback. Link: https://lore.kernel.org/r/20200129105251.12466-3-stanley.chu@mediatek.com Reviewed-by: Alim Akhtar <alim.akhtar@samsung.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>
2020-02-10scsi: ufs: ufs-mediatek: ensure UniPro is not powered down before linkupStanley Chu
MediaTek Chipsets can enter proprietary UniPro low-power mode during suspend while link is in hibern8 state. Make sure leaving low-power mode before every link startup to prevent lockup in any possible error recovery path. At the same time, re-factor related funcitons to improve code readability. Link: https://lore.kernel.org/r/20200129105251.12466-2-stanley.chu@mediatek.com Reviewed-by: Alim Akhtar <alim.akhtar@samsung.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>
2020-01-30scsi: ufs: fix spelling mistake "initilized" -> "initialized"Colin Ian King
There is a spelling mistake in a pr_err message. Fix it. Link: https://lore.kernel.org/r/20200122091250.2777221-1-colin.king@canonical.com Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-01-20scsi: ufs: Use UFS device indicated maximum LU numberBean Huo
According to Jedec standard UFS 3.0 and UFS 2.1 Spec, Maximum number of logical units supported by the UFS device is indicated by parameter bMaxNumberLU in Geometry Descriptor. This patch is to delete current hard code macro definition of UFS_UPIU_MAX_GENERAL_LUN, and switch to use device indicated number instead. Link: https://lore.kernel.org/r/20200120130820.1737-9-huobean@gmail.com Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-01-20scsi: ufs: Add max_lu_supported in struct ufs_dev_infoBean Huo
Add one new parameter max_lu_supported in struct ufs_dev_info, which will be used to express exactly how many general LUs being supported by UFS device, and initialize it during booting stage. This patch also adds a new function ufshcd_device_geo_params_init() for initialization of UFS device geometry descriptor related parameters. Link: https://lore.kernel.org/r/20200120130820.1737-8-huobean@gmail.com Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-01-20scsi: ufs: Delete is_init_prefetch from struct ufs_hbaBean Huo
Without variable is_init_prefetch, the current logic can guarantee ufshcd_init_icc_levels() will execute only once, delete it now. Link: https://lore.kernel.org/r/20200120130820.1737-7-huobean@gmail.com Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-01-20scsi: ufs: Inline two functions into their callersBean Huo
Delete ufshcd_read_power_desc() and ufshcd_read_device_desc(), directly inline ufshcd_read_desc() into its callers. Link: https://lore.kernel.org/r/20200120130820.1737-6-huobean@gmail.com Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-01-20scsi: ufs: Move ufshcd_get_max_pwr_mode() to ufshcd_device_params_init()Bean Huo
ufshcd_get_max_pwr_mode() only need to be called once while booting, take it out from ufshcd_probe_hba() and inline into ufshcd_device_params_init(). Link: https://lore.kernel.org/r/20200120130820.1737-5-huobean@gmail.com Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-01-20scsi: ufs: Split ufshcd_probe_hba() based on its called flowBean Huo
This patch has two major non-functionality changes: 1. Take scanning host if-statement out from ufshcd_probe_hba(), and move into a new added function ufshcd_add_lus(). In this new function ufshcd_add_lus(), the main functionalitis include: ICC initialization, add well-known LUs, devfreq initialization, UFS bsg probe and scsi host scan. The reason for this change is that these functionalities only being called during booting stage flow ufshcd_init()->ufshcd_async_scan(). In the processes of error handling and power management ufshcd_suspend(), ufshcd_resume(), ufshcd_probe_hba() being called, but these functionalitis above metioned are not hit. 2. Move context of initialization of parameters associated with the UFS device to a new added function ufshcd_device_params_init(). The reason of this change is that all of these parameters are used by driver, but only need to be initialized once when booting. Combine them into an integral function, make them easier maintain. Link: https://lore.kernel.org/r/20200120130820.1737-4-huobean@gmail.com Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Signed-off-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-01-20scsi: ufs: Delete struct ufs_dev_descBean Huo
In consideration of UFS host driver uses parameters of struct ufs_dev_desc, move its parameters to struct ufs_dev_info, delete struct ufs_dev_desc. Link: https://lore.kernel.org/r/20200120130820.1737-3-huobean@gmail.com Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-01-20scsi: ufs: Fix ufshcd_probe_hba() reture value in case ↵Bean Huo
ufshcd_scsi_add_wlus() fails A non-zero error value likely being returned by ufshcd_scsi_add_wlus() in case of failure of adding the WLs, but ufshcd_probe_hba() doesn't use this value, and doesn't report this failure to upper caller. This patch is to fix this issue. Fixes: 2a8fa600445c ("ufs: manually add well known logical units") Link: https://lore.kernel.org/r/20200120130820.1737-2-huobean@gmail.com Reviewed-by: Asutosh Das <asutoshd@codeaurora.org> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-01-20scsi: ufs-mediatek: enable low-power mode for hibern8 stateStanley Chu
In MediaTek Chipsets, UniPro link and ufshci can enter proprietary low-power mode while link is in hibern8 state. Link: https://lore.kernel.org/r/20200117035108.19699-4-stanley.chu@mediatek.com Reviewed-by: Alim Akhtar <alim.akhtar@samsung.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>
2020-01-20scsi: ufs: export some functions for vendor usageStanley Chu
Export below functions for vendor usage: int ufshcd_hba_enable(struct ufs_hba *hba); int ufshcd_make_hba_operational(struct ufs_hba *hba); int ufshcd_uic_hibern8_exit(struct ufs_hba *hba); Link: https://lore.kernel.org/r/20200117035108.19699-3-stanley.chu@mediatek.com Reviewed-by: Alim Akhtar <alim.akhtar@samsung.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>
2020-01-20scsi: ufs-mediatek: add dbg_register_dump implementationStanley Chu
Add dbg_register_dump variant vendor implementation in MediaTek UFS driver. Link: https://lore.kernel.org/r/20200117035108.19699-2-stanley.chu@mediatek.com 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>
2020-01-15scsi: ufs-mediatek: add apply_dev_quirks variant operationStanley Chu
Add vendor-specific variant callback "apply_dev_quirks" to MediaTek UFS driver. Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: Asutosh Das <asutoshd@codeaurora.org> Cc: Avri Altman <avri.altman@wdc.com> Cc: Bart Van Assche <bvanassche@acm.org> Cc: Bean Huo <beanhuo@micron.com> Cc: Can Guo <cang@codeaurora.org> Cc: Matthias Brugger <matthias.bgg@gmail.com> Link: https://lore.kernel.org/r/1578726707-6596-3-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>
2020-01-15scsi: ufs: pass device information to apply_dev_quirksStanley Chu
Pass UFS device information to vendor-specific variant callback "apply_dev_quirks" because some platform vendors need to know such information to apply special handling or quirks in specific devices. At the same time, modify existing vendor implementations according to the new interface for those vendor drivers which will be built-in or built as a module alone with UFS core driver. [mkp: clarified commit desc] Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: Asutosh Das <asutoshd@codeaurora.org> Cc: Avri Altman <avri.altman@wdc.com> Cc: Bart Van Assche <bvanassche@acm.org> Cc: Bean Huo <beanhuo@micron.com> Cc: Can Guo <cang@codeaurora.org> Cc: Matthias Brugger <matthias.bgg@gmail.com> Link: https://lore.kernel.org/r/1578726707-6596-2-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>
2020-01-15scsi: ufs: remove "errors" word in ufshcd_print_err_hist()Stanley Chu
Remove "errors" word in output string by ufshcd_print_err_hist() since not all printed targets are "errors". Sometimes they are just "events". In addition, all events which can be treated as "errors" already have "err" or "fail" words in their names. Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: Asutosh Das <asutoshd@codeaurora.org> Cc: Avri Altman <avri.altman@wdc.com> Cc: Bart Van Assche <bvanassche@acm.org> Cc: Bean Huo <beanhuo@micron.com> Cc: Can Guo <cang@codeaurora.org> Cc: Matthias Brugger <matthias.bgg@gmail.com> Link: https://lore.kernel.org/r/1578147968-30938-4-git-send-email-stanley.chu@mediatek.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>
2020-01-15scsi: ufs: add device reset history for vendor implementationsStanley Chu
Device reset history shall be also added for vendor's device reset variant operation implementation. Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: Asutosh Das <asutoshd@codeaurora.org> Cc: Avri Altman <avri.altman@wdc.com> Cc: Bart Van Assche <bvanassche@acm.org> Cc: Bean Huo <beanhuo@micron.com> Cc: Can Guo <cang@codeaurora.org> Cc: Matthias Brugger <matthias.bgg@gmail.com> Link: https://lore.kernel.org/r/1578147968-30938-3-git-send-email-stanley.chu@mediatek.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>
2020-01-15scsi: ufs: fix empty check of error historyStanley Chu
Currently checking if an error history element is empty or not is by its "value". In most cases, value is error code. However this checking is not correct because some errors or events do not specify any values in error history so values remain as 0, and this will lead to incorrect empty checking. Fix it by checking "timestamp" instead of "value" because timestamp will be always assigned for all history elements Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: Asutosh Das <asutoshd@codeaurora.org> Cc: Avri Altman <avri.altman@wdc.com> Cc: Bart Van Assche <bvanassche@acm.org> Cc: Bean Huo <beanhuo@micron.com> Cc: Can Guo <cang@codeaurora.org> Cc: Matthias Brugger <matthias.bgg@gmail.com> Link: https://lore.kernel.org/r/1578147968-30938-2-git-send-email-stanley.chu@mediatek.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>
2020-01-02scsi: ufs-mediatek: configure and enable clk-gatingStanley Chu
Enable clk-gating with customized delayed timer value in MediaTek Chipsets. Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: Avri Altman <avri.altman@wdc.com> Cc: Bart Van Assche <bvanassche@acm.org> Cc: Bean Huo <beanhuo@micron.com> Cc: Can Guo <cang@codeaurora.org> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Link: https://lore.kernel.org/r/1577683950-1702-7-git-send-email-stanley.chu@mediatek.com 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-mediatek: configure customized auto-hibern8 timerStanley Chu
Configure customized auto-hibern8 timer in MediaTek Chipsets. Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: Avri Altman <avri.altman@wdc.com> Cc: Bart Van Assche <bvanassche@acm.org> Cc: Bean Huo <beanhuo@micron.com> Cc: Can Guo <cang@codeaurora.org> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Link: https://lore.kernel.org/r/1577683950-1702-6-git-send-email-stanley.chu@mediatek.com 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: export ufshcd_auto_hibern8_update for vendor usageStanley Chu
Export ufshcd_auto_hibern8_update to allow vendors to use common interface to customize auto-hibernate timer. Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: Avri Altman <avri.altman@wdc.com> Cc: Bart Van Assche <bvanassche@acm.org> Cc: Bean Huo <beanhuo@micron.com> Cc: Can Guo <cang@codeaurora.org> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Link: https://lore.kernel.org/r/1577683950-1702-5-git-send-email-stanley.chu@mediatek.com Reviewed-by: Asutosh Das <asutoshd@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-mediatek: introduce reference clock controlStanley Chu
Introduce reference clock control in MediaTek Chipset in order to disable it if it is not necessary by UFS device to save system power. Currently reference clock can be disabled during system suspend, runtime suspend and clock-gating after link enters hibernate state. Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: Avri Altman <avri.altman@wdc.com> Cc: Bart Van Assche <bvanassche@acm.org> Cc: Bean Huo <beanhuo@micron.com> Cc: Can Guo <cang@codeaurora.org> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Link: https://lore.kernel.org/r/1577683950-1702-4-git-send-email-stanley.chu@mediatek.com 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-mediatek: add device reset implementationStanley Chu
Add device reset vops implementation in MediaTek UFS driver. Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: Avri Altman <avri.altman@wdc.com> Cc: Bart Van Assche <bvanassche@acm.org> Cc: Bean Huo <beanhuo@micron.com> Cc: Can Guo <cang@codeaurora.org> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Link: https://lore.kernel.org/r/1577683950-1702-3-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>
2020-01-02scsi: ufs: sysfs: Use the correct style for SPDX License IdentifierNishad Kamdar
This patch corrects the SPDX License Identifier style in header file related to UFS Host Controller. It assigns explicit block comment to the SPDX License Identifier. Changes made by using a script provided by Joe Perches here: https://lkml.org/lkml/2019/2/7/46. Link: https://lore.kernel.org/r/5ca6287665fe52d8f40062e0eab8561d2b7a5b40.1577511720.git.nishadkamdar@gmail.com Suggested-by: Joe Perches <joe@perches.com> Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-01-02scsi: ufs: Remove the SCSI timeout handlerBart Van Assche
The UFS SCSI timeout handler was needed to compensate that ufshcd_queuecommand() could return SCSI_MLQUEUE_HOST_BUSY for a long time. Commit a276c19e3e98 ("scsi: ufs: Avoid busy-waiting by eliminating tag conflicts") fixed this so the timeout handler is no longer necessary. See also commit f550c65b543b ("scsi: ufs: implement scsi host timeout handler"). 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/20191224220248.30138-7-bvanassche@acm.org 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 a race condition in the tracing codeBart Van Assche
Starting execution of a command before tracing a command may cause the completion handler to free data while it is being traced. Fix this race by tracing a command before it is submitted. 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/20191224220248.30138-5-bvanassche@acm.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: Make ufshcd_prepare_utp_scsi_cmd_upiu() easier to readBart Van Assche
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 Assche
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 Assche
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 Chu
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 Chu
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 B
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 Chu
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 Chu
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 Carpenter
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 Carpenter
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 B
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 Guo
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>
generated by cgit v1.2.3 (git 2.39.1) at 2025-08-04 04:01:13 +0000