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path: root/drivers/ufs
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2026-04-21scsi: ufs: core: Fix bRefClkFreq write failure in HS-LSS modeWang Shuaiwei
According to the UFS spec, the bRefClkFreq attribute can only be written when both sub-links are in LS-MODE. However, in HS LSS mode with resetmode = HS_MODE, if the UFS device's default bRefClkFreq value differs from the host controller's dev_ref_clk_freq setting, the write operation will fail. To fix this issue, introduce ufshcd_get_op_mode() function to detect the current link operational mode. Call ufshcd_set_dev_ref_clk() only when both sub-links are in LS-MODE to ensure the attribute can be written successfully. Signed-off-by: Wang Shuaiwei <wangshuaiwei1@xiaomi.com> Link: https://patch.msgid.link/20260414033718.1459540-1-wangshuaiwei1@xiaomi.com Reviewed-by: Peter Wang <peter.wang@mediatek.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-04-08scsi: ufs: core: Disable timestamp for Kioxia THGJFJT0E25BAIPAaron Kling
Kioxia has another product that does not support the qTimestamp attribute. Signed-off-by: Aaron Kling <webgeek1234@gmail.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20260403-thgjfjt0e25baip-no-timestamp-v1-1-1ddb34225133@gmail.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-04-02scsi: ufs: core: Make the header files self-containedBart Van Assche
Add the include directives and forward declarations that are missing from the UFS core header files. This prevents compilation failures if include directives are reordered. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20260401202506.1445324-4-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-04-02scsi: ufs: core: Remove an include directive from ufshcd-crypto.hBart Van Assche
Nothing in the ufshcd-crypto.h header file depends on the ufshcd-priv.h header file. Hence, stop including that header file. This include directive was introduced by commit 4bc26113c603 ("scsi: ufs: Split the ufshcd.h header file"). Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20260401202506.1445324-3-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-04-02scsi: ufs: core: Add a comment block above ufshcd_mcq_compl_all_cqes_lock()Bart Van Assche
Document the aspects of ufshcd_mcq_compl_all_cqes_lock() that are nontrivial in a comment block above this function. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Link: https://patch.msgid.link/20260401202506.1445324-2-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-04-02scsi: ufs: ufs-qcom: Fix spelling mistake "retore" -> "restore"Colin Ian King
There is a spelling mistake in a dev_err() message. Fix it. Signed-off-by: Colin Ian King <colin.i.king@gmail.com> Reviewed-by: Manivannan Sadhasivam <mani@kernel.org> Link: https://patch.msgid.link/20260331153049.1344957-1-colin.i.king@gmail.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-04-02Merge branch 7.0/scsi-fixes into 7.1/scsi-stagingMartin K. Petersen
Pull in fixes to resolve mpi3mr merge conflict. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-27Merge patch series "scsi: ufs: Add TX Equalization support for UFS 5.0"Martin K. Petersen
Can Guo <can.guo@oss.qualcomm.com> says: Hi, The UFS v5.0 and UFSHCI v5.0 standards have published, introducing support for HS-G6 (46.6 Gbps per lane) through the new UniPro V3.0 interconnect layer and M-PHY V6.0 physical layer specifications. To achieve reliable operation at these higher speeds, UniPro V3.0 introduces TX Equalization and Pre-Coding mechanisms that are essential for signal integrity. This patch series implements TX Equalization support in the UFS core driver as specified in UFSHCI v5.0, along with the necessary vendor operations and a reference implementation for Qualcomm UFS host controllers. Background ========== TX Equalization is a signal conditioning technique that compensates for channel impairments at high data rates (HS-G4 through HS-G6). It works by adjusting two key parameters: - PreShoot: Pre-emphasis applied before the main signal transition - DeEmphasis: De-emphasis applied after the main signal transition UniPro V3.0 defines TX Equalization Training (EQTR) procedure to automatically discover optimal TX Equalization settings. The EQTR procedure: 1. Starts from the most reliable link state (HS-G1) 2. Iterates through all possible PreShoot and DeEmphasis combinations 3. Evaluates signal quality using Figure of Merit (FOM) measurements 4. Selects the best settings for both host and device TX lanes For HS-G6, Pre-Coding is also introduced to further improve signal quality. Pre-Coding must be enabled on both transmitter and receiver when the RX_FOM indicates it is required. Implementation Overview ======================= The implementation follows the UFSHCI v5.0 specification and consists of: Core Infrastructure (Patches 1-6): - New vops callback negotiate_pwr_mode() to allow vendors to negotiate power mode parameters before applying TX Equalization settings - Support for HS-G6 gear enumeration - Complete TX EQTR procedure implementation in ufs-txeq.c - Debugfs interface for TX Equalization parameter inspection and manual retraining - Module parameters for adaptive TX Equalization control Qualcomm Implementation (Patches 7-11): - PHY-specific configurations for TX EQTR procedure - Vendor-specific FOM measurement support - TX Equalization settings application - Enable TX Equalization for HW version 0x7 and onwards The implementation is designed to be vendor-agnostic, with platform- specific details handled through the vops callbacks. Other vendors can add support by implementing the three new vops: - tx_eqtr_notify(): Called before/after TX EQTR for vendor setup - apply_tx_eqtr_settings(): Apply vendor-specific PHY configurations - get_rx_fom(): Retrieve vendor-specific FOM measurements if needed Module Parameters ================= The implementation provides several module parameters for flexibility: - use_adaptive_txeq: Enable/disable adaptive TX Equalization (default: false) - adaptive_txeq_gear: Minimum gear for adaptive TX EQ (default: HS-G6) - use_txeq_presets: Use only the 8 standaird presets (default: false) - txeq_presets_selected[]: Select specific presets for EQTR Testing ======= This patch series has been tested on Qualcomm platforms with UFS 5.0 devices, validating: - Successful TX EQTR completion for HS-G6 - Proper FOM evaluation and optimal settings selection - Pre-Coding enablement for HS-G6 - Power mode changes with TX Equalization settings applied - Report of TX Equalization settings via debugfs entries - Report of TX EQTR histories via debug entries (see next section) - Re-training TX Equalization via debugfs entry Example of TX EQTR history ========================== Device TX EQTR record summary - Target Power Mode: HS-G6, Rate-B Most recent record index: 2 Most recent record timestamp: 219573378 us TX Lane 0 FOM - PreShoot\DeEmphasis \ 0 1 2 3 4 5 6 7 0 50 70 65 - - - - x 1 x x x x x x x x 2 100 90 70 - - - - x 3 x x x x x x x x 4 95 90 - - - - - x 5 - - - - - - - x 6 x x x x x x x x 7 x x x x x x x x TX Lane 1 FOM - PreShoot\DeEmphasis \ 0 1 2 3 4 5 6 7 0 50 70 60 - - - - x 1 x x x x x x x x 2 100 80 65 - - - - x 3 x x x x x x x x 4 95 85 - - - - - x 5 - - - - - - - x 6 x x x x x x x x 7 x x x x x x x x Patch Structure =============== Patches 1-3: Preparatory changes for power mode negotiation and HS-G6 Patch 4: Core TX Equalization and EQTR implementation Patches 5-7: Debugfs support for TX Equalization Patches 8-12: Qualcomm vendor implementation Next ==== One more series has been developed to enhance TX Equalization support, which will be submitted for review after this series is accepted: - Provide board specific (static) TX Equalization settings from DTS - Parse static TX Equalization settings from DTS if provided - Apply static TX Equalization settings if use_adaptive_txeq is disabled - Add support for UFS v5.0 attributes qTxEQGnSettings & wTxEQGnSettingsExt - Enable persistent storage and retrieval of optimal TX Equalization settings Link: https://patch.msgid.link/20260325152154.1604082-1-can.guo@oss.qualcomm.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-27scsi: ufs: ufs-qcom: Enable TX EqualizationCan Guo
Enable TX Equalization for hosts with HW version 0x7 and onwards. Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Can Guo <can.guo@oss.qualcomm.com> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Link: https://patch.msgid.link/20260325152154.1604082-13-can.guo@oss.qualcomm.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-27scsi: ufs: ufs-qcom: Implement vops apply_tx_eqtr_settings()Can Guo
On some platforms, when Host Software triggers TX Equalization Training, HW does not take TX EQTR settings programmed in PA_TxEQTRSetting, instead HW takes TX EQTR settings from PA_TxEQG1Setting. Implement vops apply_tx_eqtr_setting() to work around it by programming TX EQTR settings to PA_TxEQG1Setting during TX EQTR procedure. Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Can Guo <can.guo@oss.qualcomm.com> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Link: https://patch.msgid.link/20260325152154.1604082-12-can.guo@oss.qualcomm.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-27scsi: ufs: ufs-qcom: Implement vops get_rx_fom()Can Guo
On some platforms, host's M-PHY RX_FOM Attribute always reads 0, meaning SW cannot rely on Figure of Merit (FOM) to identify the optimal TX Equalization settings for device's TX Lanes. Implement the vops ufs_qcom_get_rx_fom() such that SW can utilize the UFS Eye Opening Monitor (EOM) to evaluate the TX Equalization settings for device's TX Lanes. Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Can Guo <can.guo@oss.qualcomm.com> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Link: https://patch.msgid.link/20260325152154.1604082-11-can.guo@oss.qualcomm.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-27scsi: ufs: ufs-qcom: Implement vops tx_eqtr_notify()Can Guo
On some platforms, HW does not support triggering TX EQTR from the most reliable High-Speed (HS) Gear (HS Gear1), but only allows to trigger TX EQTR for the target HS Gear from the same HS Gear. To work around the HW limitation, implement vops tx_eqtr_notify() to change Power Mode to the target TX EQTR HS Gear prior to TX EQTR procedure and change Power Mode back to HS Gear1 (the most reliable gear) post TX EQTR procedure. Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Can Guo <can.guo@oss.qualcomm.com> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Link: https://patch.msgid.link/20260325152154.1604082-10-can.guo@oss.qualcomm.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-27scsi: ufs: ufs-qcom: Fixup PAM-4 TX L0_L1_L2_L3 adaptation pattern lengthCan Guo
If HS-G6 Power Mode change handshake is successful and outbound data Lanes are expected to transmit ADAPT, M-TX Lanes shall be configured as if (Adapt Type == REFRESH) TX_HS_ADAPT_LENGTH_L0_L1_L2_L3 = PA_PeerRxHsG6AdaptRefreshL0L1L2L3. else if (Adapt Type == INITIAL) TX_HS_ADAPT_LENGTH_L0_L1_L2_L3 = PA_PeerRxHsG6AdaptInitialL0L1L2L3. On some platforms, the ADAPT_L0_L1_L2_L3 duration on Host TX Lanes is only a half of theoretical ADAPT_L0_L1_L2_L3 duration TADAPT_L0_L1_L2_L3 (in PAM-4 UI) calculated from TX_HS_ADAPT_LENGTH_L0_L1_L2_L3. For such platforms, the workaround is to double the ADAPT_L0_L1_L2_L3 duration by uplifting TX_HS_ADAPT_LENGTH_L0_L1_L2_L3. UniPro initializes TX_HS_ADAPT_LENGTH_L0_L1_L2_L3 during HS-G6 Power Mode change handshake, it would be too late for SW to update TX_HS_ADAPT_LENGTH_L0_L1_L2_L3 post HS-G6 Power Mode change. Update PA_PeerRxHsG6AdaptRefreshL0L1L2L3 and PA_PeerRxHsG6AdaptInitialL0L1L2L3 post Link Startup and before HS-G6 Power Mode change, so that the UniPro would use the updated value during HS-G6 Power Mode change handshake. Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Can Guo <can.guo@oss.qualcomm.com> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Link: https://patch.msgid.link/20260325152154.1604082-9-can.guo@oss.qualcomm.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-27scsi: ufs: core: Add support to retrain TX Equalization via debugfsCan Guo
Drastic environmental changes, such as significant temperature shifts, can impact link signal integrity. In such cases, retraining TX Equalization is necessary to compensate for these environmental changes. Add a debugfs entry, 'tx_eq_ctrl', to allow userspace to manually trigger the TX Equalization training (EQTR) procedure and apply the identified optimal settings on the fly. These entries are created on a per-gear basis for High Speed Gear 4 (HS-G4) and above, as TX EQTR is not supported for lower gears. The 'tx_eq_ctrl' entry currently accepts the 'retrain' command to initiate the procedure. The interface is designed to be scalable to support additional commands in the future. Reading the 'tx_eq_ctrl' entry provides a usage hint to the user, ensuring the interface is self-documenting. The ufshcd's debugfs folder structure will look like below: /sys/kernel/debug/ufshcd/*ufs*/ |--tx_eq_hs_gear1/ | |--device_tx_eq_params | |--host_tx_eq_params |--tx_eq_hs_gear2/ |--tx_eq_hs_gear3/ |--tx_eq_hs_gear4/ |--tx_eq_hs_gear5/ |--tx_eq_hs_gear6/ |--device_tx_eq_params |--device_tx_eqtr_record |--host_tx_eq_params |--host_tx_eqtr_record |--tx_eq_ctrl Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Can Guo <can.guo@oss.qualcomm.com> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Link: https://patch.msgid.link/20260325152154.1604082-8-can.guo@oss.qualcomm.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-27scsi: ufs: core: Add helpers to pause and resume command processingCan Guo
In preparation for supporting TX Equalization refreshing, introduce helper functions to safely pause and resume command processing. ufshcd_pause_command_processing() ensures the host is in a quiescent state by stopping the block layer tagset, acquiring the necessary locks (scan_mutex and clk_scaling_lock), and waiting for any in-flight commands to complete within a specified timeout. ufshcd_resume_command_processing() restores the host to its previous operational state by reversing these steps in the correct order. Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Can Guo <can.guo@oss.qualcomm.com> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Link: https://patch.msgid.link/20260325152154.1604082-7-can.guo@oss.qualcomm.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-27scsi: ufs: core: Add debugfs entries for TX Equalization paramsCan Guo
Add debugfs support for UFS TX Equalization and UFS TX Equalization Training (EQTR) to facilitate runtime inspection of link quality. These entries allow developers to monitor and optimize TX Equalization parameters and EQTR records during live operation. The debugfs entries are organized on a per-gear basis under the HBA's debugfs root. Since TX EQTR is only defined for High Speed Gear 4 (HS-G4) and above, EQTR-related entries are explicitly excluded for HS-G1 through HS-G3 to avoid exposing unsupported attributes. The ufshcd's debugfs folder structure will look like below: /sys/kernel/debug/ufshcd/*ufs*/ |--tx_eq_hs_gear1/ | |--device_tx_eq_params | |--host_tx_eq_params |--tx_eq_hs_gear2/ |--tx_eq_hs_gear3/ |--tx_eq_hs_gear4/ |--tx_eq_hs_gear5/ |--tx_eq_hs_gear6/ |--device_tx_eq_params |--device_tx_eqtr_record |--host_tx_eq_params |--host_tx_eqtr_record Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Can Guo <can.guo@oss.qualcomm.com> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Link: https://patch.msgid.link/20260325152154.1604082-6-can.guo@oss.qualcomm.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-27scsi: ufs: core: Add support for TX EqualizationCan Guo
MIPI Unipro3.0 introduced PA_TxEQGnSetting and PA_PreCodeEn attributes for TX Equalization and Pre-Coding. It is Host Software's responsibility to configure these attributes for both host and device before initiating Power Mode Change to High-Speed Gears. MIPI Unipro3.0 also introduced TX Equalization Training (EQTR) to identify optimal TX Equalization settings for use by both Host's and Device's UniPro. TX EQTR shall be initiated from the most reliable High-Speed Gear (HS-G1) targeting High-Speed Gears (HS-G4 to HS-G6). Implement TX Equalization configuration and TX EQTR procedure as defined in UFSHCI v5.0 specification. The TX EQTR procedure determines the optimal TX Equalization settings by iterating through all possible PreShoot and DeEmphasis combinations and selecting the best combinations for both Host and Device based on Figure of Merit (FOM) evaluation. Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Can Guo <can.guo@oss.qualcomm.com> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Link: https://patch.msgid.link/20260325152154.1604082-5-can.guo@oss.qualcomm.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-27scsi: ufs: core: Pass force_pmc to ufshcd_config_pwr_mode() as a parameterCan Guo
Currently, callers must manually toggle hba->force_pmc before and after calling ufshcd_config_pwr_mode() to force a Power Mode change. Introduce enum ufshcd_pmc_policy and refactor ufshcd_config_pwr_mode() to accept pmc_policy as a parameter to force a Power Mode change. Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Can Guo <can.guo@oss.qualcomm.com> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Link: https://patch.msgid.link/20260325152154.1604082-3-can.guo@oss.qualcomm.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-27scsi: ufs: core: Introduce a new ufshcd vops negotiate_pwr_mode()Can Guo
Most vendor specific implemenations of vops pwr_change_notify(PRE_CHANGE) are fulfilling two things at once: - Vendor specific target power mode negotiation - Vendor specific power mode change preparation When TX Equalization is added into consideration, before power mode change to a target power mode, TX Equalization Training (EQTR) needs be done for that target power mode. In addition, UFSHCI spec requires to start TX EQTR from HS-G1 (the most reliable High Speed Gear). Adding TX EQTR before pwr_change_notify(PRE_CHANGE) is not applicable because we don't know the negotiated power mode yet. Adding TX EQTR post pwr_change_notify(PRE_CHANGE) is inappropriate because pwr_change_notify(PRE_CHANGE) has finished preparation for a power mode change to negotiated power mode, yet we are changing power mode to HS-G1 for TX EQTR. Add a new vops negotiate_pwr_mode() so that vendor specific power mode negotiation can be fulfilled in its vendor specific implementations. Later on, TX EQTR can be added post vops negotiate_pwr_mode() and before vops pwr_change_notify(PRE_CHANGE). Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Can Guo <can.guo@oss.qualcomm.com> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Link: https://patch.msgid.link/20260325152154.1604082-2-can.guo@oss.qualcomm.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-27scsi: ufs: rockchip: Drop unused includeAndy Shevchenko
This driver includes the legacy header <linux/gpio.h> but does not use any symbols from it. Drop the inclusion. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com> Link: https://patch.msgid.link/20260320215606.3236516-1-andriy.shevchenko@linux.intel.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-19scsi: ufs: core: Handle MCQ IAG eventsvamshi gajjela
Add support for handling aggregation-based interrupts when operating in MCQ mode. In legacy interrupt mode, an IE.IAGES is triggered when the counter or timer threshold is reached. To manage this, the handler now resets the aggregation counter and timer by writing to the MCQIACRy.CTR register. Since the register layout of MCQIACRy is identical to the existing UTRIACR register, this implementation reuses the previously defined bitfield masks to maintain consistency and reduce code duplication. Extend ufshcd_handle_mcq_cq_events() with a boolean iag parameter. If set, the handler resets the MCQ IAG counter and timer. Define MCQ_IAG_EVENT_STATUS (0x200000) and include it in UFSHCD_ENABLE_MCQ_INTRS to ensure the interrupt is unmasked during initialization. Signed-off-by: Vamshi Gajjela <vamshigajjela@google.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20260310190308.2474956-1-vamshigajjela@google.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-10scsi: ufs: host: mediatek: Add VCC on delay for stabilityEd Tsai
Introduce a delay after enabling UFS5 VCC for MT6995 to ensure voltage stability before refclk activation. Signed-off-by: Ed Tsai <ed.tsai@mediatek.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20260310005230.4001904-6-ed.tsai@mediatek.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-10scsi: ufs: core: Add quirks for VCC ramp-up delayEd Tsai
On some platforms, the VCC regulator has a slow ramp-up time. Add a delay after enabling VCC to ensure voltage has fully stabilized before we enable the clocks. Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Ed Tsai <ed.tsai@mediatek.com> Link: https://patch.msgid.link/20260310005230.4001904-4-ed.tsai@mediatek.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-10scsi: ufs: ufs-pci: Add support for Intel Nova LakeAdrian Hunter
Add PCI ID to support Intel Nova Lake, same as Intel Meteor Lake (MTL). Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20260309085815.55216-1-adrian.hunter@intel.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-07scsi: ufs: core: Fix SError in ufshcd_rtc_work() during UFS suspendWang Shuaiwei
In __ufshcd_wl_suspend(), cancel_delayed_work_sync() is called to cancel the UFS RTC work, but it is placed after ufshcd_vops_suspend(hba, pm_op, POST_CHANGE). This creates a race condition where ufshcd_rtc_work() can still be running while ufshcd_vops_suspend() is executing. When UFSHCD_CAP_CLK_GATING is not supported, the condition !hba->clk_gating.active_reqs is always true, causing ufshcd_update_rtc() to be executed. Since ufshcd_vops_suspend() typically performs clock gating operations, executing ufshcd_update_rtc() at that moment triggers an SError. The kernel panic trace is as follows: Kernel panic - not syncing: Asynchronous SError Interrupt Call trace: dump_backtrace+0xec/0x128 show_stack+0x18/0x28 dump_stack_lvl+0x40/0xa0 dump_stack+0x18/0x24 panic+0x148/0x374 nmi_panic+0x3c/0x8c arm64_serror_panic+0x64/0x8c do_serror+0xc4/0xc8 el1h_64_error_handler+0x34/0x4c el1h_64_error+0x68/0x6c el1_interrupt+0x20/0x58 el1h_64_irq_handler+0x18/0x24 el1h_64_irq+0x68/0x6c ktime_get+0xc4/0x12c ufshcd_mcq_sq_stop+0x4c/0xec ufshcd_mcq_sq_cleanup+0x64/0x1dc ufshcd_clear_cmd+0x38/0x134 ufshcd_issue_dev_cmd+0x298/0x4d0 ufshcd_exec_dev_cmd+0x1a4/0x1c4 ufshcd_query_attr+0xbc/0x19c ufshcd_rtc_work+0x10c/0x1c8 process_scheduled_works+0x1c4/0x45c worker_thread+0x32c/0x3e8 kthread+0x120/0x1d8 ret_from_fork+0x10/0x20 Fix this by moving cancel_delayed_work_sync() before the call to ufshcd_vops_suspend(hba, pm_op, PRE_CHANGE), ensuring the UFS RTC work is fully completed or cancelled at that point. Cc: Bean Huo <beanhuo@iokpp.de> Fixes: 6bf999e0eb41 ("scsi: ufs: core: Add UFS RTC support") Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Wang Shuaiwei <wangshuaiwei1@xiaomi.com> Link: https://patch.msgid.link/20260307035128.3419687-1-wangshuaiwei1@xiaomi.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-07scsi: ufs: core: Avoid IRQ thread wakeup during active UIC commandPeter Wang
Only return IRQ_WAKE_THREAD when MCQ and ESI are not enabled and no UIC command is active. The default UIC command timeout is 500ms, Using threaded IRQs during an active UIC command increases the risk of timeout due to possible preemption by other system IRQs. Signed-off-by: Peter Wang <peter.wang@mediatek.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20260306054419.3816557-1-peter.wang@mediatek.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-03-07scsi: ufs: core: Add support to notify userspace of UniPro QoS eventsCan Guo
The UniPro stack manages to repair many potential Link problems without the need to notify the Application Layer. Repair mechanisms of the stack include L2 re-transmission and successful handling of PA_INIT.req. Nevertheless, any successful repair sequence requires Link bandwidth that is no longer vailable for the Application. Therefore, it may be useful for an Application to understand how often such repair attempts are made. The DME implements Quality of Service monitoring using a simple counting scheme, counting error events and comparing them against the number of correctly received or transmitted bytes. When the error counter exceeds a programmed threshold before the byte counter overflows, a DME_QoS.ind is issued to the Application and both counters are reset. When the byte counter overflows before the error counter has reached the programmed threshold, both counters are reset without triggering a DME_QoS.ind. The DME provides Link quality monitoring for the following purposes: 1. Detection of re-occurring repaired fatal error conditions on the Link (PA_INIT loop). This kind of detection is useful if capabilities exchanged between local and peer permit a potential operation at a higher M-PHY Gear, but the physical interconnect between local and peer Device does not, or, after Line quality degradation, no longer satisfies channel characteristics. 2. Detection of degraded inbound or outbound Link quality, to allow an Application to issue an ADAPT sequence for a Link running in HS-G4 or higher HS Gears. This kind of detection is used to monitor a slowly degrading Link quality, e.g., one being affected by temperature and voltage variations, against the expected M-PHY bit error rate. Userspace can configure and enable UniPro QoS via UniPro QoS Attributes (via UFS BSG) and get notified by dme_qos_notification without polling UniPro QoS Status attribute. The dme_qos_notification attribute is a bitfield with the following bit assignments: Bit Description === ====================================== 0 DME QoS Monitor has been reset by host 1 QoS from TX is detected 2 QoS from RX is detected 3 QoS from PA_INIT is detected Signed-off-by: Can Guo <can.guo@oss.qualcomm.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Link: https://patch.msgid.link/20260305110856.959211-2-can.guo@oss.qualcomm.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-02-24scsi: ufs: core: Fix shift out of bounds when MAXQ=32wangshuaiwei
According to JESD223F, the maximum number of queues (MAXQ) is 32. When MCQ is enabled and ESI is disabled, nr_hw_queues=32 causes a shift overflow problem. Fix this by using 64-bit intermediate values to handle the nr_hw_queues=32 case safely. Signed-off-by: wangshuaiwei <wangshuaiwei1@xiaomi.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20260224063228.50112-1-wangshuaiwei1@xiaomi.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-02-24scsi: ufs: core: Support UFSHCI 4.1 CQ entry tagPeter Wang
The UFSHCI 4.1 specification introduces a new completion queue (CQ) entry format, allowing the tag to be obtained directly. Signed-off-by: Peter Wang <peter.wang@mediatek.com> Reviewed-by: Bean Huo <beanhuo@micron.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20260210071834.1837878-1-peter.wang@mediatek.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-02-24scsi: ufs: core: Add debug log for MCQ command timeoutPeter Wang
It is difficult to debug situations where an MCQ command timeout occurs, the corresponding CQ tag response is received, but the request is not completed. Add a one-line log to indicate when the CQ entry is abnormal. Signed-off-by: Peter Wang <peter.wang@mediatek.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20260210070837.1820710-3-peter.wang@mediatek.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-02-24scsi: ufs: core: Add debug log for UIC command timeoutPeter Wang
It is difficult to debug when a UIC command timeout occurs simultaneously with a UIC command complete interrupt. Currently, we only see the timeout log without any debug information, making it unclear whether the UFS device failed to respond or the host entered an incorrect state. Add a one-line log to cover this situation. Signed-off-by: Peter Wang <peter.wang@mediatek.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20260210070837.1820710-2-peter.wang@mediatek.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-02-24scsi: ufs: core: Move link recovery for hibern8 exit failure to wl_resumePeter Wang
Move the link recovery trigger from ufshcd_uic_pwr_ctrl() to __ufshcd_wl_resume(). Ensure link recovery is only attempted when hibern8 exit fails during resume, not during hibern8 enter in suspend. Improve error handling and prevent unnecessary link recovery attempts. Fixes: 35dabf4503b9 ("scsi: ufs: core: Use link recovery when h8 exit fails during runtime resume") Signed-off-by: Peter Wang <peter.wang@mediatek.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20260223103906.2533654-1-peter.wang@mediatek.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-02-24scsi: ufs: core: Fix possible NULL pointer dereference in ↵Peter Wang
ufshcd_add_command_trace() The kernel log indicates a crash in ufshcd_add_command_trace, due to a NULL pointer dereference when accessing hwq->id. This can happen if ufshcd_mcq_req_to_hwq() returns NULL. This patch adds a NULL check for hwq before accessing its id field to prevent a kernel crash. Kernel log excerpt: [<ffffffd5d192dc4c>] notify_die+0x4c/0x8c [<ffffffd5d1814e58>] __die+0x60/0xb0 [<ffffffd5d1814d64>] die+0x4c/0xe0 [<ffffffd5d181575c>] die_kernel_fault+0x74/0x88 [<ffffffd5d1864db4>] __do_kernel_fault+0x314/0x318 [<ffffffd5d2a3cdf8>] do_page_fault+0xa4/0x5f8 [<ffffffd5d2a3cd34>] do_translation_fault+0x34/0x54 [<ffffffd5d1864524>] do_mem_abort+0x50/0xa8 [<ffffffd5d2a297dc>] el1_abort+0x3c/0x64 [<ffffffd5d2a29718>] el1h_64_sync_handler+0x44/0xcc [<ffffffd5d181133c>] el1h_64_sync+0x80/0x88 [<ffffffd5d255c1dc>] ufshcd_add_command_trace+0x23c/0x320 [<ffffffd5d255bad8>] ufshcd_compl_one_cqe+0xa4/0x404 [<ffffffd5d2572968>] ufshcd_mcq_poll_cqe_lock+0xac/0x104 [<ffffffd5d11c7460>] ufs_mtk_mcq_intr+0x54/0x74 [ufs_mediatek_mod] [<ffffffd5d19ab92c>] __handle_irq_event_percpu+0xc8/0x348 [<ffffffd5d19abca8>] handle_irq_event+0x3c/0xa8 [<ffffffd5d19b1f0c>] handle_fasteoi_irq+0xf8/0x294 [<ffffffd5d19aa778>] generic_handle_domain_irq+0x54/0x80 [<ffffffd5d18102bc>] gic_handle_irq+0x1d4/0x330 [<ffffffd5d1838210>] call_on_irq_stack+0x44/0x68 [<ffffffd5d183af30>] do_interrupt_handler+0x78/0xd8 [<ffffffd5d2a29c00>] el1_interrupt+0x48/0xa8 [<ffffffd5d2a29ba8>] el1h_64_irq_handler+0x14/0x24 [<ffffffd5d18113c4>] el1h_64_irq+0x80/0x88 [<ffffffd5d2527fb4>] arch_local_irq_enable+0x4/0x1c [<ffffffd5d25282e4>] cpuidle_enter+0x34/0x54 [<ffffffd5d195a678>] do_idle+0x1dc/0x2f8 [<ffffffd5d195a7c4>] cpu_startup_entry+0x30/0x3c [<ffffffd5d18155c4>] secondary_start_kernel+0x134/0x1ac [<ffffffd5d18640bc>] __secondary_switched+0xc4/0xcc Signed-off-by: Peter Wang <peter.wang@mediatek.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20260223065657.2432447-1-peter.wang@mediatek.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-02-23Merge branch '7.0/scsi-queue' into 7.0/scsi-fixesMartin K. Petersen
Pull in remaining fixes from 7.0/scsi-queue. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-02-21Convert 'alloc_obj' family to use the new default GFP_KERNEL argumentLinus Torvalds
This was done entirely with mindless brute force, using git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' | xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/' to convert the new alloc_obj() users that had a simple GFP_KERNEL argument to just drop that argument. Note that due to the extreme simplicity of the scripting, any slightly more complex cases spread over multiple lines would not be triggered: they definitely exist, but this covers the vast bulk of the cases, and the resulting diff is also then easier to check automatically. For the same reason the 'flex' versions will be done as a separate conversion. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-21treewide: Replace kmalloc with kmalloc_obj for non-scalar typesKees Cook
This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook <kees@kernel.org>
2026-02-17scsi: ufs: core: Reset urgent_bkops_lvl to allow runtime PM power modeWon Jung
Ensures that UFS Runtime PM can achieve power saving after System PM suspend by resetting hba->urgent_bkops_lvl. Also modify the ufshcd_bkops_exception_event_handler to avoid setting urgent_bkops_lvl when status is 0, which helps maintain optimal power management. On UFS devices supporting UFSHCD_CAP_AUTO_BKOPS_SUSPEND, a BKOPS exception event can lead to a situation where UFS Runtime PM can't enter low-power mode states even after the BKOPS exception has been resolved. BKOPS exception with bkops status 0 occurs, the driver logs: "ufshcd_bkops_exception_event_handler: device raised urgent BKOPS exception for bkops status 0" When a BKOPS exception occurs, ufshcd_bkops_exception_event_handler() reads the BKOPS status and sets hba->urgent_bkops_lvl to BKOPS_STATUS_NO_OP(0). This allows the device to perform Runtime PM without changing the UFS power mode. (__ufshcd_wl_suspend(hba, UFS_RUNTIME_PM)) During system PM suspend, ufshcd_disable_auto_bkops() is called, disabling auto bkops. After UFS System PM Resume, when runtime PM attempts to suspend again, ufshcd_urgent_bkops() is invoked. Since hba->urgent_bkops_lvl remains at BKOPS_STATUS_NO_OP(0), ufshcd_enable_auto_bkops() is triggered. However, in ufshcd_bkops_ctrl(), the driver compares the current BKOPS status with hba->urgent_bkops_lvl, and only enables auto bkops if curr_status >= hba->urgent_bkops_lvl. Since both values are 0, the condition is met As a result, __ufshcd_wl_suspend(hba, UFS_RUNTIME_PM) skips power mode transitions and remains in an active state, preventing power saving even though no urgent BKOPS condition exists. Signed-off-by: Won Jung <wone.jung@samsung.com> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Link: https://patch.msgid.link/1891546521.01770806581968.JavaMail.epsvc@epcpadp2new Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-02-17scsi: ufs: core: Fix RPMB region size detection for UFS 2.2Alexey Charkov
Older UFS spec devices (2.2 and earlier) do not expose per-region RPMB sizes, as only one RPMB region is supported. In such cases, the size of the single RPMB region can be deduced from the Logical Block Count and Logical Block Size fields in the RPMB Unit Descriptor. Add a fallback mechanism to calculate the RPMB region size from these fields if the device implements an older spec, so that the RPMB driver can work with such devices - otherwise it silently skips the whole RPMB. Section 14.1.4.6 (RPMB Unit Descriptor) Link: https://www.jedec.org/system/files/docs/JESD220C-2_2.pdf Cc: stable@vger.kernel.org Fixes: b06b8c421485 ("scsi: ufs: core: Add OP-TEE based RPMB driver for UFS devices") Reviewed-by: Bean Huo <beanhuo@micron.com> Signed-off-by: Alexey Charkov <alchark@flipper.net> Link: https://patch.msgid.link/20260209-ufs-rpmb-v3-1-b1804e71bd38@flipper.net Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-02-12Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds
Pull SCSI updates from James Bottomley: "Usual driver updates (qla2xxx, mpi3mr, mpt3sas, ufs) plus assorted cleanups and fixes. The biggest core change is the massive code motion in the sd driver to remove forward declarations and the most significant change is to enumify the queuecommand return" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (78 commits) scsi: csiostor: Fix dereference of null pointer rn scsi: buslogic: Reduce stack usage scsi: ufs: host: mediatek: Require CONFIG_PM scsi: ufs: mediatek: Fix page faults in ufs_mtk_clk_scale() trace event scsi: smartpqi: Fix memory leak in pqi_report_phys_luns() scsi: mpi3mr: Make driver probing asynchronous scsi: ufs: core: Flush exception handling work when RPM level is zero scsi: efct: Use IRQF_ONESHOT and default primary handler scsi: ufs: core: Use a host-wide tagset in SDB mode scsi: qla2xxx: target: Add WQ_PERCPU to alloc_workqueue() users scsi: qla2xxx: Add WQ_PERCPU to alloc_workqueue() users scsi: qla4xxx: Add WQ_PERCPU to alloc_workqueue() users scsi: mpi3mr: Driver version update to 8.17.0.3.50 scsi: mpi3mr: Fixed the W=1 compilation warning scsi: mpi3mr: Record and report controller firmware faults scsi: mpi3mr: Update MPI Headers to revision 39 scsi: mpi3mr: Use negotiated link rate from DevicePage0 scsi: mpi3mr: Avoid redundant diag-fault resets scsi: mpi3mr: Rename log data save helper to reflect threaded/BH context scsi: mpi3mr: Add module parameter to control threaded IRQ polling ...
2026-02-12Merge tag 'mm-nonmm-stable-2026-02-12-10-48' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull non-MM updates from Andrew Morton: - "ocfs2: give ocfs2 the ability to reclaim suballocator free bg" saves disk space by teaching ocfs2 to reclaim suballocator block group space (Heming Zhao) - "Add ARRAY_END(), and use it to fix off-by-one bugs" adds the ARRAY_END() macro and uses it in various places (Alejandro Colomar) - "vmcoreinfo: support VMCOREINFO_BYTES larger than PAGE_SIZE" makes the vmcore code future-safe, if VMCOREINFO_BYTES ever exceeds the page size (Pnina Feder) - "kallsyms: Prevent invalid access when showing module buildid" cleans up kallsyms code related to module buildid and fixes an invalid access crash when printing backtraces (Petr Mladek) - "Address page fault in ima_restore_measurement_list()" fixes a kexec-related crash that can occur when booting the second-stage kernel on x86 (Harshit Mogalapalli) - "kho: ABI headers and Documentation updates" updates the kexec handover ABI documentation (Mike Rapoport) - "Align atomic storage" adds the __aligned attribute to atomic_t and atomic64_t definitions to get natural alignment of both types on csky, m68k, microblaze, nios2, openrisc and sh (Finn Thain) - "kho: clean up page initialization logic" simplifies the page initialization logic in kho_restore_page() (Pratyush Yadav) - "Unload linux/kernel.h" moves several things out of kernel.h and into more appropriate places (Yury Norov) - "don't abuse task_struct.group_leader" removes the usage of ->group_leader when it is "obviously unnecessary" (Oleg Nesterov) - "list private v2 & luo flb" adds some infrastructure improvements to the live update orchestrator (Pasha Tatashin) * tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (107 commits) watchdog/hardlockup: simplify perf event probe and remove per-cpu dependency procfs: fix missing RCU protection when reading real_parent in do_task_stat() watchdog/softlockup: fix sample ring index wrap in need_counting_irqs() kcsan, compiler_types: avoid duplicate type issues in BPF Type Format kho: fix doc for kho_restore_pages() tests/liveupdate: add in-kernel liveupdate test liveupdate: luo_flb: introduce File-Lifecycle-Bound global state liveupdate: luo_file: Use private list list: add kunit test for private list primitives list: add primitives for private list manipulations delayacct: fix uapi timespec64 definition panic: add panic_force_cpu= parameter to redirect panic to a specific CPU netclassid: use thread_group_leader(p) in update_classid_task() RDMA/umem: don't abuse current->group_leader drm/pan*: don't abuse current->group_leader drm/amd: kill the outdated "Only the pthreads threading model is supported" checks drm/amdgpu: don't abuse current->group_leader android/binder: use same_thread_group(proc->tsk, current) in binder_mmap() android/binder: don't abuse current->group_leader kho: skip memoryless NUMA nodes when reserving scratch areas ...
2026-02-09Merge tag 'pm-6.20-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management updates from Rafael Wysocki: "By the number of commits, cpufreq is the leading party (again) and the most visible change there is the removal of the omap-cpufreq driver that has not been used for a long time (good riddance). There are also quite a few changes in the cppc_cpufreq driver, mostly related to fixing its frequency invariance engine in the case when the CPPC registers used by it are not in PCC. In addition to that, support for AM62L3 is added to the ti-cpufreq driver and the cpufreq-dt-platdev list is updated for some platforms. The remaining cpufreq changes are assorted fixes and cleanups. Next up is cpuidle and the changes there are dominated by intel_idle driver updates, mostly related to the new command line facility allowing users to adjust the list of C-states used by the driver. There are also a few updates of cpuidle governors, including two menu governor fixes and some refinements of the teo governor, and a MAINTAINERS update adding Christian Loehle as a cpuidle reviewer. [Thanks for stepping up Christian!] The most significant update related to system suspend and hibernation is the one to stop freezing the PM runtime workqueue during system PM transitions which allows some deadlocks to be avoided. There is also a fix for possible concurrent bit field updates in the core device suspend code and a few other minor fixes. Apart from the above, several drivers are updated to discard the return value of pm_runtime_put() which is going to be converted to a void function as soon as everybody stops using its return value, PL4 support for Ice Lake is added to the Intel RAPL power capping driver, and there are assorted cleanups, documentation fixes, and some cpupower utility improvements. Specifics: - Remove the unused omap-cpufreq driver (Andreas Kemnade) - Optimize error handling code in cpufreq_boost_trigger_state() and make cpufreq_boost_trigger_state() return -EOPNOTSUPP if no policy supports boost (Lifeng Zheng) - Update cpufreq-dt-platdev list for tegra, qcom, TI (Aaron Kling, Dhruva Gole, and Konrad Dybcio) - Minor improvements to the cpufreq and cpumask rust implementation (Alexandre Courbot, Alice Ryhl, Tamir Duberstein, and Yilin Chen) - Add support for AM62L3 SoC to the ti-cpufreq driver (Dhruva Gole) - Update arch_freq_scale in the CPPC cpufreq driver's frequency invariance engine (FIE) in scheduler ticks if the related CPPC registers are not in PCC (Jie Zhan) - Assorted minor cleanups and improvements in ARM cpufreq drivers (Juan Martinez, Felix Gu, Luca Weiss, and Sergey Shtylyov) - Add generic helpers for sysfs show/store to cppc_cpufreq (Sumit Gupta) - Make the scaling_setspeed cpufreq sysfs attribute return the actual requested frequency to avoid confusion (Pengjie Zhang) - Simplify the idle CPU time granularity test in the ondemand cpufreq governor (Frederic Weisbecker) - Enable asym capacity in intel_pstate only when CPU SMT is not possible (Yaxiong Tian) - Update the description of rate_limit_us default value in cpufreq documentation (Yaxiong Tian) - Add a command line option to adjust the C-states table in the intel_idle driver, remove the 'preferred_cstates' module parameter from it, add C-states validation to it and clean it up (Artem Bityutskiy) - Make the menu cpuidle governor always check the time till the closest timer event when the scheduler tick has been stopped to prevent it from mistakenly selecting the deepest available idle state (Rafael Wysocki) - Update the teo cpuidle governor to avoid making suboptimal decisions in certain corner cases and generally improve idle state selection accuracy (Rafael Wysocki) - Remove an unlikely() annotation on the early-return condition in menu_select() that leads to branch misprediction 100% of the time on systems with only 1 idle state enabled, like ARM64 servers (Breno Leitao) - Add Christian Loehle to MAINTAINERS as a cpuidle reviewer (Christian Loehle) - Stop flagging the PM runtime workqueue as freezable to avoid system suspend and resume deadlocks in subsystems that assume asynchronous runtime PM to work during system-wide PM transitions (Rafael Wysocki) - Drop redundant NULL pointer checks before acomp_request_free() from the hibernation code handling image saving (Rafael Wysocki) - Update wakeup_sources_walk_start() to handle empty lists of wakeup sources as appropriate (Samuel Wu) - Make dev_pm_clear_wake_irq() check the power.wakeirq value under power.lock to avoid race conditions (Gui-Dong Han) - Avoid bit field races related to power.work_in_progress in the core device suspend code (Xuewen Yan) - Make several drivers discard pm_runtime_put() return value in preparation for converting that function to a void one (Rafael Wysocki) - Add PL4 support for Ice Lake to the Intel RAPL power capping driver (Daniel Tang) - Replace sprintf() with sysfs_emit() in power capping sysfs show functions (Sumeet Pawnikar) - Make dev_pm_opp_get_level() return value match the documentation after a previous update of the latter (Aleks Todorov) - Use scoped for each OF child loop in the OPP code (Krzysztof Kozlowski) - Fix a bug in an example code snippet and correct typos in the energy model management documentation (Patrick Little) - Fix miscellaneous problems in cpupower (Kaushlendra Kumar): * idle_monitor: Fix incorrect value logged after stop * Fix inverted APERF capability check * Use strcspn() to strip trailing newline * Reset errno before strtoull() * Show C0 in idle-info dump - Improve cpupower installation procedure by making the systemd step optional and allowing users to disable the installation of systemd's unit file (João Marcos Costa)" * tag 'pm-6.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (65 commits) PM: sleep: core: Avoid bit field races related to work_in_progress PM: sleep: wakeirq: harden dev_pm_clear_wake_irq() against races cpufreq: Documentation: Update description of rate_limit_us default value cpufreq: intel_pstate: Enable asym capacity only when CPU SMT is not possible PM: wakeup: Handle empty list in wakeup_sources_walk_start() PM: EM: Documentation: Fix bug in example code snippet Documentation: Fix typos in energy model documentation cpuidle: governors: teo: Refine intercepts-based idle state lookup cpuidle: governors: teo: Adjust the classification of wakeup events cpufreq: ondemand: Simplify idle cputime granularity test cpufreq: userspace: make scaling_setspeed return the actual requested frequency PM: hibernate: Drop NULL pointer checks before acomp_request_free() cpufreq: CPPC: Add generic helpers for sysfs show/store cpufreq: scmi: Fix device_node reference leak in scmi_cpu_domain_id() cpufreq: ti-cpufreq: add support for AM62L3 SoC cpufreq: dt-platdev: Add ti,am62l3 to blocklist cpufreq/amd-pstate: Add comment explaining nominal_perf usage for performance policy cpufreq: scmi: correct SCMI explanation cpufreq: dt-platdev: Block the driver from probing on more QC platforms rust: cpumask: rename methods of Cpumask for clarity and consistency ...
2026-02-04Merge branch 'pm-runtime'Rafael J. Wysocki
Merge updates related to runtime PM for 6.20-rc1/7.0-rc1: - Make several drivers discard pm_runtime_put() return value in preparation for converting that function to a void one (Rafael Wysocki) * pm-runtime: drm: Discard pm_runtime_put() return value genirq/chip: Change irq_chip_pm_put() return type to void scsi: ufs: core: Discard pm_runtime_put() return values platform/chrome: cros_hps_i2c: Discard pm_runtime_put() return value coresight: Discard pm_runtime_put() return values hwspinlock: omap: Discard pm_runtime_put() return value watchdog: rzv2h_wdt: Discard pm_runtime_put() return value watchdog: rz: Discard pm_runtime_put() return values media: ccs: Discard pm_runtime_put() return value drm/imagination: Discard pm_runtime_put() return value USB: core: Discard pm_runtime_put() return value
2026-02-03scsi: ufs: host: mediatek: Require CONFIG_PMArnd Bergmann
The added print statement from a recent fix causes the driver to fail building when CONFIG_PM is disabled: drivers/ufs/host/ufs-mediatek.c: In function 'ufs_mtk_resume': drivers/ufs/host/ufs-mediatek.c:1890:40: error: 'struct dev_pm_info' has no member named 'request' 1890 | hba->dev->power.request, It seems unlikely that the driver can work at all without CONFIG_PM, so just add a dependency and remove the existing ifdef checks, rather than adding another ifdef. Fixes: 15ef3f5aa822 ("scsi: ufs: host: mediatek: Enhance recovery on resume failure") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Link: https://patch.msgid.link/20260202095052.1232703-1-arnd@kernel.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-02-03scsi: ufs: mediatek: Fix page faults in ufs_mtk_clk_scale() trace eventKeita Morisaki
The ufs_mtk_clk_scale() trace event currently stores the address of the name string directly via __field(const char *, name). This pointer may become invalid after the module is unloaded, causing page faults when the trace buffer is subsequently accessed. This can occur because the MediaTek UFS driver can be configured as a loadable module (tristate in Kconfig), meaning the name string passed to the trace event may reside in module memory that becomes invalid after module unload. Fix this by using __string() and __assign_str() to copy the string contents into the ring buffer instead of storing the pointer. This ensures the trace data remains valid regardless of module state. This change increases the memory usage for each ftrace entry by a few bytes (clock names are typically 7-15 characters like "ufs_sel" or "ufs_sel_max_src") compared to storing an 8-byte pointer. Note that this change does not affect anything unless all of the following conditions are met: - CONFIG_SCSI_UFS_MEDIATEK is enabled - ftrace tracing is enabled - The ufs_mtk_clk_scale event is enabled in ftrace Signed-off-by: Keita Morisaki <keita.morisaki@tier4.jp> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Link: https://patch.msgid.link/20260202024526.122515-1-keita.morisaki@tier4.jp Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-02-03scsi: ufs: core: Flush exception handling work when RPM level is zeroThomas Yen
Ensure that the exception event handling work is explicitly flushed during suspend when the runtime power management level is set to UFS_PM_LVL_0. When the RPM level is zero, the device power mode and link state both remain active. Previously, the UFS core driver bypassed flushing exception event handling jobs in this configuration. This created a race condition where the driver could attempt to access the host controller to handle an exception after the system had already entered a deep power-down state, resulting in a system crash. Explicitly flush this work and disable auto BKOPs before the suspend callback proceeds. This guarantees that pending exception tasks complete and prevents illegal hardware access during the power-down sequence. Fixes: 57d104c153d3 ("ufs: add UFS power management support") Signed-off-by: Thomas Yen <thomasyen@google.com> Cc: Stable Tree <stable@vger.kernel.org> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20260129165156.956601-1-thomasyen@google.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-02-03scsi: ufs: core: Use a host-wide tagset in SDB modeBart Van Assche
In single-doorbell (SDB) mode there is only a single request queue. Hence, it doesn't matter whether or not the SCSI host tagset is configured as host-wide. Configure the host tagset as host-wide in SDB mode because this enables a simplification of the hot path. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Peter Wang <peter.wang@mediatek.com> Link: https://patch.msgid.link/20260116180800.3085233-1-bvanassche@acm.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-01-23scsi: ufs: amd-versal2: Fix PHY initialization in HCE enable notifyAjay Neeli
Move the PHY initialization from PRE_CHANGE to POST_CHANGE in the ufs_versal2_hce_enable_notify() callback. This ensures that the PHY is initialized after the host controller enable sequence is complete, rather than before it starts. The PHY initialization requires the UFS host controller to be in a stable enabled state to properly configure the MPHY registers. Moving this to POST_CHANGE aligns with the expected initialization order and prevents potential timing issues during controller startup. Fixes: 769b8b2ffded ("scsi: ufs: amd-versal2: Add UFS support for AMD Versal Gen 2 SoC") Signed-off-by: Ajay Neeli <ajay.neeli@amd.com> Link: https://patch.msgid.link/20251224053950.54213-1-ajay.neeli@amd.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-01-23Merge patch series "ufs: ufs-qcom: Add support firmware managed platforms"Martin K. Petersen
Ram Kumar Dwivedi <ram.dwivedi@oss.qualcomm.com> says: On Qualcomm automotive SoC SA8255P, platform resource like clocks, interconnect, resets, regulators and PHY are configured remotely by firmware. Logical power domain is used to abstract these resources in firmware and SCMI power protocol is used to request resource operations by using runtime PM framework APIs such as pm_runtime_get/put_sync to invoke power_on/_off calls from kernel respectively. Link: https://patch.msgid.link/20260113080046.284089-1-ram.dwivedi@oss.qualcomm.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-01-23scsi: ufs: ufs-qcom: Add support for firmware-managed resource abstractionRam Kumar Dwivedi
Add a compatible string for SA8255p platforms where resources such as PHY, clocks, regulators, and resets are managed by firmware through an SCMI server. Use the SCMI power protocol to abstract these resources and invoke power operations via runtime PM APIs (pm_runtime_get/put_sync). Introduce vendor operations (vops) for SA8255p targets to enable SCMI- based resource control. In this model, capabilities like clock scaling and gating are not yet supported; these will be added incrementally. Co-developed-by: Anjana Hari <anjana.hari@oss.qualcomm.com> Signed-off-by: Anjana Hari <anjana.hari@oss.qualcomm.com> Co-developed-by: Shazad Hussain <shazad.hussain@oss.qualcomm.com> Signed-off-by: Shazad Hussain <shazad.hussain@oss.qualcomm.com> Signed-off-by: Ram Kumar Dwivedi <ram.dwivedi@oss.qualcomm.com> Reviewed-by: Manivannan Sadhasivam <mani@kernel.org> Link: https://patch.msgid.link/20260113080046.284089-5-ram.dwivedi@oss.qualcomm.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2026-01-23scsi: ufs: core: Enforce minimum PM level for sysfs configurationRam Kumar Dwivedi
Some UFS platforms only support a limited subset of power levels. Currently, the sysfs interface allows users to set any PM level without validating the minimum supported value. If an unsupported level is selected, suspend may fail. Introduce an pm_lvl_min field in the ufs_hba structure and use it to clamp the PM level requested via sysfs so that only supported levels are accepted. Platforms that require a minimum PM level can set this field during probe. Signed-off-by: Ram Kumar Dwivedi <ram.dwivedi@oss.qualcomm.com> Reviewed-by: Manivannan Sadhasivam <mani@kernel.org> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Link: https://patch.msgid.link/20260113080046.284089-4-ram.dwivedi@oss.qualcomm.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
generated by cgit v1.2.3 (git 2.25.1) at 2026-05-07 12:42:34 +0000