diff options
Diffstat (limited to 'drivers/ufs/core')
-rw-r--r-- | drivers/ufs/core/ufs-mcq.c | 12 | ||||
-rw-r--r-- | drivers/ufs/core/ufs-sysfs.c | 49 | ||||
-rw-r--r-- | drivers/ufs/core/ufshcd.c | 90 |
3 files changed, 128 insertions, 23 deletions
diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c index 0787456c2b89..8db81f1a12d5 100644 --- a/drivers/ufs/core/ufs-mcq.c +++ b/drivers/ufs/core/ufs-mcq.c @@ -258,9 +258,7 @@ EXPORT_SYMBOL_GPL(ufshcd_mcq_write_cqis); * Current MCQ specification doesn't provide a Task Tag or its equivalent in * the Completion Queue Entry. Find the Task Tag using an indirect method. */ -static int ufshcd_mcq_get_tag(struct ufs_hba *hba, - struct ufs_hw_queue *hwq, - struct cq_entry *cqe) +static int ufshcd_mcq_get_tag(struct ufs_hba *hba, struct cq_entry *cqe) { u64 addr; @@ -278,7 +276,7 @@ static void ufshcd_mcq_process_cqe(struct ufs_hba *hba, struct ufs_hw_queue *hwq) { struct cq_entry *cqe = ufshcd_mcq_cur_cqe(hwq); - int tag = ufshcd_mcq_get_tag(hba, hwq, cqe); + int tag = ufshcd_mcq_get_tag(hba, cqe); if (cqe->command_desc_base_addr) { ufshcd_compl_one_cqe(hba, tag, cqe); @@ -399,6 +397,12 @@ void ufshcd_mcq_enable_esi(struct ufs_hba *hba) } EXPORT_SYMBOL_GPL(ufshcd_mcq_enable_esi); +void ufshcd_mcq_enable(struct ufs_hba *hba) +{ + ufshcd_rmwl(hba, MCQ_MODE_SELECT, MCQ_MODE_SELECT, REG_UFS_MEM_CFG); +} +EXPORT_SYMBOL_GPL(ufshcd_mcq_enable); + void ufshcd_mcq_config_esi(struct ufs_hba *hba, struct msi_msg *msg) { ufshcd_writel(hba, msg->address_lo, REG_UFS_ESILBA); diff --git a/drivers/ufs/core/ufs-sysfs.c b/drivers/ufs/core/ufs-sysfs.c index e6d12289e017..3d049967f6bc 100644 --- a/drivers/ufs/core/ufs-sysfs.c +++ b/drivers/ufs/core/ufs-sysfs.c @@ -405,6 +405,53 @@ static ssize_t wb_flush_threshold_store(struct device *dev, return count; } +/** + * pm_qos_enable_show - sysfs handler to show pm qos enable value + * @dev: device associated with the UFS controller + * @attr: sysfs attribute handle + * @buf: buffer for sysfs file + * + * Print 1 if PM QoS feature is enabled, 0 if disabled. + * + * Returns number of characters written to @buf. + */ +static ssize_t pm_qos_enable_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%d\n", hba->pm_qos_enabled); +} + +/** + * pm_qos_enable_store - sysfs handler to store value + * @dev: device associated with the UFS controller + * @attr: sysfs attribute handle + * @buf: buffer for sysfs file + * @count: stores buffer characters count + * + * Input 0 to disable PM QoS and 1 value to enable. + * Default state: 1 + * + * Return: number of characters written to @buf on success, < 0 upon failure. + */ +static ssize_t pm_qos_enable_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + bool value; + + if (kstrtobool(buf, &value)) + return -EINVAL; + + if (value) + ufshcd_pm_qos_init(hba); + else + ufshcd_pm_qos_exit(hba); + + return count; +} + static DEVICE_ATTR_RW(rpm_lvl); static DEVICE_ATTR_RO(rpm_target_dev_state); static DEVICE_ATTR_RO(rpm_target_link_state); @@ -416,6 +463,7 @@ static DEVICE_ATTR_RW(wb_on); static DEVICE_ATTR_RW(enable_wb_buf_flush); static DEVICE_ATTR_RW(wb_flush_threshold); static DEVICE_ATTR_RW(rtc_update_ms); +static DEVICE_ATTR_RW(pm_qos_enable); static struct attribute *ufs_sysfs_ufshcd_attrs[] = { &dev_attr_rpm_lvl.attr, @@ -429,6 +477,7 @@ static struct attribute *ufs_sysfs_ufshcd_attrs[] = { &dev_attr_enable_wb_buf_flush.attr, &dev_attr_wb_flush_threshold.attr, &dev_attr_rtc_update_ms.attr, + &dev_attr_pm_qos_enable.attr, NULL }; diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index eac7fff6992d..e30fd125988d 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -1015,6 +1015,48 @@ static bool ufshcd_is_unipro_pa_params_tuning_req(struct ufs_hba *hba) } /** + * ufshcd_pm_qos_init - initialize PM QoS request + * @hba: per adapter instance + */ +void ufshcd_pm_qos_init(struct ufs_hba *hba) +{ + + if (hba->pm_qos_enabled) + return; + + cpu_latency_qos_add_request(&hba->pm_qos_req, PM_QOS_DEFAULT_VALUE); + + if (cpu_latency_qos_request_active(&hba->pm_qos_req)) + hba->pm_qos_enabled = true; +} + +/** + * ufshcd_pm_qos_exit - remove request from PM QoS + * @hba: per adapter instance + */ +void ufshcd_pm_qos_exit(struct ufs_hba *hba) +{ + if (!hba->pm_qos_enabled) + return; + + cpu_latency_qos_remove_request(&hba->pm_qos_req); + hba->pm_qos_enabled = false; +} + +/** + * ufshcd_pm_qos_update - update PM QoS request + * @hba: per adapter instance + * @on: If True, vote for perf PM QoS mode otherwise power save mode + */ +static void ufshcd_pm_qos_update(struct ufs_hba *hba, bool on) +{ + if (!hba->pm_qos_enabled) + return; + + cpu_latency_qos_update_request(&hba->pm_qos_req, on ? 0 : PM_QOS_DEFAULT_VALUE); +} + +/** * ufshcd_set_clk_freq - set UFS controller clock frequencies * @hba: per adapter instance * @scale_up: If True, set max possible frequency othewise set low frequency @@ -1160,8 +1202,11 @@ static int ufshcd_scale_clks(struct ufs_hba *hba, unsigned long freq, hba->devfreq->previous_freq); else ufshcd_set_clk_freq(hba, !scale_up); + goto out; } + ufshcd_pm_qos_update(hba, scale_up); + out: trace_ufshcd_profile_clk_scaling(dev_name(hba->dev), (scale_up ? "up" : "down"), @@ -5602,7 +5647,6 @@ static void ufshcd_mcq_compl_pending_transfer(struct ufs_hba *hba, struct ufshcd_lrb *lrbp; struct scsi_cmnd *cmd; unsigned long flags; - u32 hwq_num, utag; int tag; for (tag = 0; tag < hba->nutrs; tag++) { @@ -5612,9 +5656,7 @@ static void ufshcd_mcq_compl_pending_transfer(struct ufs_hba *hba, test_bit(SCMD_STATE_COMPLETE, &cmd->state)) continue; - utag = blk_mq_unique_tag(scsi_cmd_to_rq(cmd)); - hwq_num = blk_mq_unique_tag_to_hwq(utag); - hwq = &hba->uhq[hwq_num]; + hwq = ufshcd_mcq_req_to_hwq(hba, scsi_cmd_to_rq(cmd)); if (force_compl) { ufshcd_mcq_compl_all_cqes_lock(hba, hwq); @@ -7987,11 +8029,13 @@ out: static inline void ufshcd_blk_pm_runtime_init(struct scsi_device *sdev) { + struct Scsi_Host *shost = sdev->host; + scsi_autopm_get_device(sdev); blk_pm_runtime_init(sdev->request_queue, &sdev->sdev_gendev); if (sdev->rpm_autosuspend) pm_runtime_set_autosuspend_delay(&sdev->sdev_gendev, - RPM_AUTOSUSPEND_DELAY_MS); + shost->rpm_autosuspend_delay); scsi_autopm_put_device(sdev); } @@ -8801,9 +8845,7 @@ static void ufshcd_config_mcq(struct ufs_hba *hba) hba->host->can_queue = hba->nutrs - UFSHCD_NUM_RESERVED; hba->reserved_slot = hba->nutrs - UFSHCD_NUM_RESERVED; - /* Select MCQ mode */ - ufshcd_writel(hba, ufshcd_readl(hba, REG_UFS_MEM_CFG) | 0x1, - REG_UFS_MEM_CFG); + ufshcd_mcq_enable(hba); hba->mcq_enabled = true; dev_info(hba->dev, "MCQ configured, nr_queues=%d, io_queues=%d, read_queue=%d, poll_queues=%d, queue_depth=%d\n", @@ -9065,7 +9107,6 @@ static const struct scsi_host_template ufshcd_driver_template = { .track_queue_depth = 1, .skip_settle_delay = 1, .sdev_groups = ufshcd_driver_groups, - .rpm_autosuspend_delay = RPM_AUTOSUSPEND_DELAY_MS, }; static int ufshcd_config_vreg_load(struct device *dev, struct ufs_vreg *vreg, @@ -9280,6 +9321,8 @@ static int ufshcd_setup_clocks(struct ufs_hba *hba, bool on) if (ret) return ret; + if (!ufshcd_is_clkscaling_supported(hba)) + ufshcd_pm_qos_update(hba, on); out: if (ret) { list_for_each_entry(clki, head, list) { @@ -9457,6 +9500,7 @@ out: static void ufshcd_hba_exit(struct ufs_hba *hba) { if (hba->is_powered) { + ufshcd_pm_qos_exit(hba); ufshcd_exit_clk_scaling(hba); ufshcd_exit_clk_gating(hba); if (hba->eh_wq) @@ -9476,7 +9520,17 @@ static int ufshcd_execute_start_stop(struct scsi_device *sdev, struct scsi_sense_hdr *sshdr) { const unsigned char cdb[6] = { START_STOP, 0, 0, 0, pwr_mode << 4, 0 }; + struct scsi_failure failure_defs[] = { + { + .allowed = 2, + .result = SCMD_FAILURE_RESULT_ANY, + }, + }; + struct scsi_failures failures = { + .failure_definitions = failure_defs, + }; const struct scsi_exec_args args = { + .failures = &failures, .sshdr = sshdr, .req_flags = BLK_MQ_REQ_PM, .scmd_flags = SCMD_FAIL_IF_RECOVERING, @@ -9502,7 +9556,7 @@ static int ufshcd_set_dev_pwr_mode(struct ufs_hba *hba, struct scsi_sense_hdr sshdr; struct scsi_device *sdp; unsigned long flags; - int ret, retries; + int ret; spin_lock_irqsave(hba->host->host_lock, flags); sdp = hba->ufs_device_wlun; @@ -9528,15 +9582,7 @@ static int ufshcd_set_dev_pwr_mode(struct ufs_hba *hba, * callbacks hence set the RQF_PM flag so that it doesn't resume the * already suspended childs. */ - for (retries = 3; retries > 0; --retries) { - ret = ufshcd_execute_start_stop(sdp, pwr_mode, &sshdr); - /* - * scsi_execute() only returns a negative value if the request - * queue is dying. - */ - if (ret <= 0) - break; - } + ret = ufshcd_execute_start_stop(sdp, pwr_mode, &sshdr); if (ret) { sdev_printk(KERN_WARNING, sdp, "START_STOP failed for power mode: %d, result %x\n", @@ -10109,6 +10155,7 @@ static int ufshcd_suspend(struct ufs_hba *hba) ufshcd_vreg_set_lpm(hba); /* Put the host controller in low power mode if possible */ ufshcd_hba_vreg_set_lpm(hba); + ufshcd_pm_qos_update(hba, false); return ret; } @@ -10520,6 +10567,10 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq) host->max_cmd_len = UFS_CDB_SIZE; host->queuecommand_may_block = !!(hba->caps & UFSHCD_CAP_CLK_GATING); + /* Use default RPM delay if host not set */ + if (host->rpm_autosuspend_delay == 0) + host->rpm_autosuspend_delay = RPM_AUTOSUSPEND_DELAY_MS; + hba->max_pwr_info.is_valid = false; /* Initialize work queues */ @@ -10655,6 +10706,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq) ufs_sysfs_add_nodes(hba->dev); device_enable_async_suspend(dev); + ufshcd_pm_qos_init(hba); return 0; free_tmf_queue: |