From patchwork Thu Feb 11 19:18:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Asutosh Das \(asd\)" X-Patchwork-Id: 381437 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 74BBDC433E0 for ; Thu, 11 Feb 2021 19:21:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2D0EC64DE1 for ; Thu, 11 Feb 2021 19:21:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230000AbhBKTTw (ORCPT ); Thu, 11 Feb 2021 14:19:52 -0500 Received: from labrats.qualcomm.com ([199.106.110.90]:12488 "EHLO labrats.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229553AbhBKTTs (ORCPT ); Thu, 11 Feb 2021 14:19:48 -0500 IronPort-SDR: kAfoij29/9glFVdfpomaH70Sk/5R+O2mC9Ja8+6ggaK1fEV2VdzlQopVnp5zGJZvfqGJvbKSSQ 0OELPXIwIJ55h4K9mgH68RwFxcXCxGJJ73uVNGtRCzbTUGnk5PICpF1DnT+7Mt0e3xhtC6RXNV mzb5OrRwbBZP6NFhVs59EL3OBYuNk1GvKHmroFTk0A1+fq+OtWyFX9Q6c18SlS86KRHCHrGre0 CL/T2li2CNpIgnITV8sfofwpAKYe6AOD/Gh38Az0+IpRmexaKhN5NDWUEFTnqr+jvmYerDAxTs WcI= X-IronPort-AV: E=Sophos;i="5.81,171,1610438400"; d="scan'208";a="47741092" Received: from unknown (HELO ironmsg03-sd.qualcomm.com) ([10.53.140.143]) by labrats.qualcomm.com with ESMTP; 11 Feb 2021 11:19:00 -0800 X-QCInternal: smtphost Received: from wsp769891wss.qualcomm.com (HELO stor-presley.qualcomm.com) ([192.168.140.85]) by ironmsg03-sd.qualcomm.com with ESMTP; 11 Feb 2021 11:18:59 -0800 Received: by stor-presley.qualcomm.com (Postfix, from userid 92687) id 40B5A2191A; Thu, 11 Feb 2021 11:18:59 -0800 (PST) From: Asutosh Das To: cang@codeaurora.org, martin.petersen@oracle.com, linux-scsi@vger.kernel.org Cc: Asutosh Das , linux-arm-msm@vger.kernel.org, stern@rowland.harvard.edu, Alim Akhtar , Avri Altman , "James E.J. Bottomley" , Steven Rostedt , Ingo Molnar , Stanley Chu , Bean Huo , Jaegeuk Kim , Kiwoong Kim , Adrian Hunter , Satya Tangirala , linux-kernel@vger.kernel.org (open list) Subject: [RFC PATCH v3 1/1] scsi: ufs: Enable power management for wlun Date: Thu, 11 Feb 2021 11:18:29 -0800 Message-Id: X-Mailer: git-send-email 2.7.4 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org During runtime-suspend of ufs host, the scsi devices are already suspended and so are the queues associated with them. But the ufs host sends SSU to wlun during its runtime-suspend. During the process blk_queue_enter checks if the queue is not in suspended state. If so, it waits for the queue to resume, and never comes out of it. The commit (d55d15a33: scsi: block: Do not accept any requests while suspended) adds the check if the queue is in suspended state in blk_queue_enter(). Call trace: __switch_to+0x174/0x2c4 __schedule+0x478/0x764 schedule+0x9c/0xe0 blk_queue_enter+0x158/0x228 blk_mq_alloc_request+0x40/0xa4 blk_get_request+0x2c/0x70 __scsi_execute+0x60/0x1c4 ufshcd_set_dev_pwr_mode+0x124/0x1e4 ufshcd_suspend+0x208/0x83c ufshcd_runtime_suspend+0x40/0x154 ufshcd_pltfrm_runtime_suspend+0x14/0x20 pm_generic_runtime_suspend+0x28/0x3c __rpm_callback+0x80/0x2a4 rpm_suspend+0x308/0x614 rpm_idle+0x158/0x228 pm_runtime_work+0x84/0xac process_one_work+0x1f0/0x470 worker_thread+0x26c/0x4c8 kthread+0x13c/0x320 ret_from_fork+0x10/0x18 Fix this by registering ufs device wlun as a scsi driver and registering it for block runtime-pm. Also make this as a supplier for all other luns. That way, this device wlun suspends after all the consumers and resumes after hba resumes. Co-developed-by: Can Guo Signed-off-by: Can Guo Signed-off-by: Asutosh Das Reviewed-by: Bart Van Assche --- drivers/scsi/ufs/ufshcd.c | 415 +++++++++++++++++++++++++++++++++++++-------- drivers/scsi/ufs/ufshcd.h | 4 + include/trace/events/ufs.h | 20 +++ 3 files changed, 364 insertions(+), 75 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 45624c7..e92dbde 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -16,6 +16,7 @@ #include #include #include +#include #include "ufshcd.h" #include "ufs_quirks.h" #include "unipro.h" @@ -251,6 +252,13 @@ static int ufshcd_wb_toggle_flush_during_h8(struct ufs_hba *hba, bool set); static inline int ufshcd_wb_toggle_flush(struct ufs_hba *hba, bool enable); static void ufshcd_hba_vreg_set_lpm(struct ufs_hba *hba); static void ufshcd_hba_vreg_set_hpm(struct ufs_hba *hba); +static int __ufshcd_wl_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op); +static int __ufshcd_wl_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op); +static int ufshcd_wl_runtime_suspend(struct device *dev); +static int ufshcd_wl_runtime_resume(struct device *dev); +static int ufshcd_wl_suspend(struct device *dev); +static int ufshcd_wl_resume(struct device *dev); +static void ufshcd_wl_shutdown(struct device *dev); static inline bool ufshcd_valid_tag(struct ufs_hba *hba, int tag) { @@ -2572,6 +2580,17 @@ static inline u16 ufshcd_upiu_wlun_to_scsi_wlun(u8 upiu_wlun_id) return (upiu_wlun_id & ~UFS_UPIU_WLUN_ID) | SCSI_W_LUN_BASE; } +static inline bool is_rpmb_wlun(struct scsi_device *sdev) +{ + return (sdev->lun == ufshcd_upiu_wlun_to_scsi_wlun(UFS_UPIU_RPMB_WLUN)); +} + +static inline bool is_device_wlun(struct scsi_device *sdev) +{ + return (sdev->lun == + ufshcd_upiu_wlun_to_scsi_wlun(UFS_UPIU_UFS_DEVICE_WLUN)); +} + static void ufshcd_init_lrb(struct ufs_hba *hba, struct ufshcd_lrb *lrb, int i) { struct utp_transfer_cmd_desc *cmd_descp = hba->ucdl_base_addr; @@ -4808,6 +4827,43 @@ static inline void ufshcd_get_lu_power_on_wp_status(struct ufs_hba *hba, } /** + * ufshcd_setup_links - associate link b/w device wlun and other luns + * @sdev: pointer to SCSI device + * @hba: pointer to ufs hba + * + * Returns void + */ +static void ufshcd_setup_links(struct ufs_hba *hba, struct scsi_device *sdev) +{ + struct device_link *link; + + /* + * device wlun is the supplier & rest of the luns are consumers + * This ensures that device wlun suspends after all other luns. + */ + if (hba->sdev_ufs_device) { + link = device_link_add(&sdev->sdev_gendev, + &hba->sdev_ufs_device->sdev_gendev, + DL_FLAG_PM_RUNTIME); + if (!link) { + dev_err(&sdev->sdev_gendev, "Failed establishing link - %s\n", + dev_name(&hba->sdev_ufs_device->sdev_gendev)); + return; + } + hba->luns_avail--; + /* Ignore REPORT_LUN wlun probing */ + if (hba->luns_avail != 1) + return; + + pm_runtime_put_noidle(&hba->sdev_ufs_device->sdev_gendev); + pm_runtime_mark_last_busy(&hba->sdev_ufs_device->sdev_gendev); + } else { + /* device wlun is probed */ + hba->luns_avail--; + } +} + +/** * ufshcd_slave_alloc - handle initial SCSI device configurations * @sdev: pointer to SCSI device * @@ -4838,6 +4894,8 @@ static int ufshcd_slave_alloc(struct scsi_device *sdev) ufshcd_get_lu_power_on_wp_status(hba, sdev); + ufshcd_setup_links(hba, sdev); + return 0; } @@ -5589,8 +5647,8 @@ static void ufshcd_rpm_dev_flush_recheck_work(struct work_struct *work) * after a certain delay to recheck the threshold by next runtime * suspend. */ - pm_runtime_get_sync(hba->dev); - pm_runtime_put_sync(hba->dev); + scsi_autopm_get_device(hba->sdev_ufs_device); + scsi_autopm_put_device(hba->sdev_ufs_device); } /** @@ -7254,6 +7312,14 @@ static int ufshcd_scsi_add_wlus(struct ufs_hba *hba) goto out; } ufshcd_blk_pm_runtime_init(hba->sdev_ufs_device); + /* + * A pm_runtime_put_sync is invoked when this device enables blk_pm_runtime + * & would suspend the device-wlun upon timer expiry. + * But suspending device wlun _may_ put the ufs device in the pre-defined + * low power mode (SSU ). Probing of other luns may fail then. + * Don't allow this suspend until all the luns have been probed. + */ + pm_runtime_get_noresume(&hba->sdev_ufs_device->sdev_gendev); scsi_device_put(hba->sdev_ufs_device); hba->sdev_rpmb = __scsi_add_device(hba->host, 0, 0, @@ -7417,6 +7483,9 @@ static int ufs_get_device_desc(struct ufs_hba *hba) goto out; } + hba->luns_avail = desc_buf[DEVICE_DESC_PARAM_NUM_LU] + + desc_buf[DEVICE_DESC_PARAM_NUM_WLU]; + ufs_fixup_device_setup(hba); ufshcd_wb_probe(hba, desc_buf); @@ -7747,6 +7816,54 @@ static int ufshcd_device_params_init(struct ufs_hba *hba) return ret; } +static int ufshcd_wl_probe(struct device *dev) +{ + struct scsi_device *sdev = to_scsi_device(dev); + + /* + * Use this driver for both device wlun and rpmb lun + * It's used to send uac to rpmb wlun and ssu to device wlun + */ + if (sdev && (is_rpmb_wlun(sdev) || is_device_wlun(sdev))) + return 0; + return -ENODEV; +} + +static int ufshcd_wl_remove(struct device *dev) +{ + struct scsi_device *sdev = to_scsi_device(dev); + + scsi_remove_device(sdev); + return 0; +} + +static const struct dev_pm_ops ufshcd_wl_pm_ops = { + SET_RUNTIME_PM_OPS(ufshcd_wl_runtime_suspend, ufshcd_wl_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(ufshcd_wl_suspend, ufshcd_wl_resume) +}; + +/** + * ufs_wlun - describes 2 wluns: + * ufs-device wlun - used to send pm commands + * and rpmb wlun - for rpmb commands + * All luns including rpmb are consumers of ufs-device wlun. + * + * Currently, no sd driver is present for wluns. + * Hence the no specific pm operations are performed. + * With ufs design, SSU should be sent to ufs-device wlun. + * Hence register a scsi driver for ufs wluns only. + */ +static struct scsi_driver ufs_wlun = { + .gendrv = { + .name = "ufs_device_wlun", + .owner = THIS_MODULE, + .probe = ufshcd_wl_probe, + .remove = ufshcd_wl_remove, + .pm = &ufshcd_wl_pm_ops, + .shutdown = ufshcd_wl_shutdown, + }, +}; + /** * ufshcd_add_lus - probe and add UFS logical units * @hba: per-adapter instance @@ -7755,6 +7872,12 @@ static int ufshcd_add_lus(struct ufs_hba *hba) { int ret; + ret = scsi_register_driver(&ufs_wlun.gendrv); + if (ret) { + dev_err(hba->dev, "Register device wlun driver failed: %d\n", + ret); + return ret; + } /* Add required well known logical units to scsi mid layer */ ret = ufshcd_scsi_add_wlus(hba); if (ret) @@ -7964,6 +8087,7 @@ static void ufshcd_async_scan(void *data, async_cookie_t cookie) pm_runtime_put_sync(hba->dev); ufshcd_hba_exit(hba); } + hba->init_done = true; } static const struct attribute_group *ufshcd_driver_groups[] = { @@ -8475,7 +8599,8 @@ static int ufshcd_set_dev_pwr_mode(struct ufs_hba *hba, * handling context. */ hba->host->eh_noresume = 1; - ufshcd_clear_ua_wluns(hba); + if (hba->wlun_dev_clr_ua) + ufshcd_clear_ua_wlun(hba, UFS_UPIU_UFS_DEVICE_WLUN); cmd[4] = pwr_mode << 4; @@ -8650,26 +8775,9 @@ static void ufshcd_hba_vreg_set_hpm(struct ufs_hba *hba) ufshcd_setup_hba_vreg(hba, true); } -/** - * ufshcd_suspend - helper function for suspend operations - * @hba: per adapter instance - * @pm_op: desired low power operation type - * - * This function will try to put the UFS device and link into low power - * mode based on the "rpm_lvl" (Runtime PM level) or "spm_lvl" - * (System PM level). - * - * If this function is called during shutdown, it will make sure that - * both UFS device and UFS link is powered off. - * - * NOTE: UFS device & link must be active before we enter in this function. - * - * Returns 0 for success and non-zero for failure - */ -static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) +static int __ufshcd_wl_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) { int ret = 0; - int check_for_bkops; enum ufs_pm_level pm_lvl; enum ufs_dev_pwr_mode req_dev_pwr_mode; enum uic_link_state req_link_state; @@ -8690,24 +8798,23 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) * just gate the clocks. */ ufshcd_hold(hba, false); - hba->clk_gating.is_suspended = true; if (ufshcd_is_clkscaling_supported(hba)) ufshcd_clk_scaling_suspend(hba, true); if (req_dev_pwr_mode == UFS_ACTIVE_PWR_MODE && req_link_state == UIC_LINK_ACTIVE_STATE) { - goto disable_clks; + goto enable_scaling; } if ((req_dev_pwr_mode == hba->curr_dev_pwr_mode) && (req_link_state == hba->uic_link_state)) - goto enable_gating; + goto enable_scaling; /* UFS device & link must be active before we enter in this function */ if (!ufshcd_is_ufs_dev_active(hba) || !ufshcd_is_link_active(hba)) { ret = -EINVAL; - goto enable_gating; + goto enable_scaling; } if (ufshcd_is_runtime_pm(pm_op)) { @@ -8719,7 +8826,7 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) */ ret = ufshcd_urgent_bkops(hba); if (ret) - goto enable_gating; + goto enable_scaling; } else { /* make sure that auto bkops is disabled */ ufshcd_disable_auto_bkops(hba); @@ -8746,10 +8853,214 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) if (!hba->dev_info.b_rpm_dev_flush_capable) { ret = ufshcd_set_dev_pwr_mode(hba, req_dev_pwr_mode); - if (ret) - goto enable_gating; + if (!ret) + goto out; } } +enable_scaling: + if (ufshcd_is_clkscaling_supported(hba)) + ufshcd_clk_scaling_suspend(hba, false); + + hba->dev_info.b_rpm_dev_flush_capable = false; +out: + if (hba->dev_info.b_rpm_dev_flush_capable) { + schedule_delayed_work(&hba->rpm_dev_flush_recheck_work, + msecs_to_jiffies(RPM_DEV_FLUSH_RECHECK_WORK_DELAY_MS)); + } + if (ret) + ufshcd_update_evt_hist(hba, UFS_EVT_WL_SUSP_ERR, (u32)ret); + ufshcd_release(hba); + return ret; +} + +static int __ufshcd_wl_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) +{ + int ret = 0; + enum uic_link_state old_link_state; + + if (!hba->init_done) + return 0; + + old_link_state = hba->uic_link_state; + ufshcd_hold(hba, false); + if (!ufshcd_is_ufs_dev_active(hba)) { + ret = ufshcd_set_dev_pwr_mode(hba, UFS_ACTIVE_PWR_MODE); + if (ret) + goto out; + } + + if (ufshcd_keep_autobkops_enabled_except_suspend(hba)) + ufshcd_enable_auto_bkops(hba); + else + /* + * If BKOPs operations are urgently needed at this moment then + * keep auto-bkops enabled or else disable it. + */ + ufshcd_urgent_bkops(hba); + + if (hba->clk_scaling.is_allowed) + ufshcd_resume_clkscaling(hba); + + if (hba->dev_info.b_rpm_dev_flush_capable) { + hba->dev_info.b_rpm_dev_flush_capable = false; + cancel_delayed_work(&hba->rpm_dev_flush_recheck_work); + } + +out: + hba->clk_gating.is_suspended = false; + if (ret) + ufshcd_update_evt_hist(hba, UFS_EVT_WL_RES_ERR, (u32)ret); + ufshcd_release(hba); + return ret; +} + +static int ufshcd_wl_runtime_suspend(struct device *dev) +{ + struct scsi_device *sdev = to_scsi_device(dev); + struct ufs_hba *hba; + int ret; + ktime_t start = ktime_get(); + + hba = shost_priv(sdev->host); + if (is_rpmb_wlun(sdev)) { + if (hba->sdev_rpmb) + return ufshcd_clear_ua_wlun(hba, UFS_UPIU_RPMB_WLUN); + return 0; + } + + ret = __ufshcd_wl_suspend(hba, UFS_RUNTIME_PM); + if (ret) + dev_err(&sdev->sdev_gendev, "%s failed: %d\n", __func__, ret); + + trace_ufshcd_wl_runtime_suspend(dev_name(dev), ret, + ktime_to_us(ktime_sub(ktime_get(), start)), + hba->curr_dev_pwr_mode, hba->uic_link_state); + + return ret; +} + +static int ufshcd_wl_runtime_resume(struct device *dev) +{ + struct scsi_device *sdev = to_scsi_device(dev); + struct ufs_hba *hba; + int ret; + ktime_t start = ktime_get(); + + hba = shost_priv(sdev->host); + + if (is_rpmb_wlun(sdev)) + return 0; + ret = __ufshcd_wl_resume(hba, UFS_RUNTIME_PM); + if (ret) + dev_err(&sdev->sdev_gendev, "%s failed: %d\n", __func__, ret); + + trace_ufshcd_wl_runtime_resume(dev_name(dev), ret, + ktime_to_us(ktime_sub(ktime_get(), start)), + hba->curr_dev_pwr_mode, hba->uic_link_state); + + return ret; +} + +static int ufshcd_wl_suspend(struct device *dev) +{ + struct scsi_device *sdev = to_scsi_device(dev); + struct ufs_hba *hba; + int ret; + ktime_t start = ktime_get(); + + if (is_rpmb_wlun(sdev)) + return 0; + hba = shost_priv(sdev->host); + ret = __ufshcd_wl_suspend(hba, UFS_SYSTEM_PM); + if (ret) + dev_err(&sdev->sdev_gendev, "%s failed: %d\n", __func__, ret); + + trace_ufshcd_wl_suspend(dev_name(dev), ret, + ktime_to_us(ktime_sub(ktime_get(), start)), + hba->curr_dev_pwr_mode, hba->uic_link_state); + + return ret; + +} + +static int ufshcd_wl_resume(struct device *dev) +{ + struct scsi_device *sdev = to_scsi_device(dev); + struct ufs_hba *hba; + int ret; + ktime_t start = ktime_get(); + + if (pm_runtime_suspended(dev) || is_rpmb_wlun(sdev)) + return 0; + hba = shost_priv(sdev->host); + + ret = __ufshcd_wl_resume(hba, UFS_SYSTEM_PM); + if (ret) + dev_err(&sdev->sdev_gendev, "%s failed: %d\n", __func__, ret); + + trace_ufshcd_wl_resume(dev_name(dev), ret, + ktime_to_us(ktime_sub(ktime_get(), start)), + hba->curr_dev_pwr_mode, hba->uic_link_state); + + return ret; +} + +static void ufshcd_wl_shutdown(struct device *dev) +{ + struct scsi_device *sdev = to_scsi_device(dev); + struct ufs_hba *hba; + + if (is_rpmb_wlun(sdev)) + return; + hba = shost_priv(sdev->host); + scsi_device_quiesce(sdev); + shost_for_each_device(sdev, hba->host) { + if (sdev == hba->sdev_ufs_device) + continue; + scsi_remove_device(sdev); + } + __ufshcd_wl_suspend(hba, UFS_SHUTDOWN_PM); +} + +/** + * ufshcd_suspend - helper function for suspend operations + * @hba: per adapter instance + * @pm_op: desired low power operation type + * + * This function will try to put the UFS link into low power + * mode based on the "rpm_lvl" (Runtime PM level) or "spm_lvl" + * (System PM level). + * + * If this function is called during shutdown, it will make sure that + * link is powered off. + * + * Returns 0 for success and non-zero for failure + */ +static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) +{ + int ret = 0; + int check_for_bkops; + enum ufs_pm_level pm_lvl; + enum ufs_dev_pwr_mode req_dev_pwr_mode; + enum uic_link_state req_link_state; + + hba->pm_op_in_progress = 1; + if (!ufshcd_is_shutdown_pm(pm_op)) { + pm_lvl = ufshcd_is_runtime_pm(pm_op) ? + hba->rpm_lvl : hba->spm_lvl; + req_dev_pwr_mode = ufs_get_pm_lvl_to_dev_pwr_mode(pm_lvl); + req_link_state = ufs_get_pm_lvl_to_link_pwr_state(pm_lvl); + } else { + req_dev_pwr_mode = UFS_POWERDOWN_PWR_MODE; + req_link_state = UIC_LINK_OFF_STATE; + } + + /* + * If we can't transition into any of the low power modes + * just gate the clocks. + */ + ufshcd_hold(hba, false); + hba->clk_gating.is_suspended = true; /* * In the case of DeepSleep, the device is expected to remain powered @@ -8758,9 +9069,8 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) check_for_bkops = !ufshcd_is_ufs_dev_deepsleep(hba); ret = ufshcd_link_state_transition(hba, req_link_state, check_for_bkops); if (ret) - goto set_dev_active; + goto enable_gating; -disable_clks: /* * Call vendor specific suspend callback. As these callbacks may access * vendor specific host controller register space call them before the @@ -8790,7 +9100,6 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) goto out; set_link_active: - ufshcd_vreg_set_hpm(hba); /* * Device hardware reset is required to exit DeepSleep. Also, for * DeepSleep, the link is off so host reset and restore will be done @@ -8804,28 +9113,15 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) ufshcd_set_link_active(hba); else if (ufshcd_is_link_off(hba)) ufshcd_host_reset_and_restore(hba); -set_dev_active: /* Can also get here needing to exit DeepSleep */ if (ufshcd_is_ufs_dev_deepsleep(hba)) { ufshcd_device_reset(hba); ufshcd_host_reset_and_restore(hba); } - if (!ufshcd_set_dev_pwr_mode(hba, UFS_ACTIVE_PWR_MODE)) - ufshcd_disable_auto_bkops(hba); enable_gating: - if (ufshcd_is_clkscaling_supported(hba)) - ufshcd_clk_scaling_suspend(hba, false); - hba->clk_gating.is_suspended = false; - hba->dev_info.b_rpm_dev_flush_capable = false; - ufshcd_clear_ua_wluns(hba); ufshcd_release(hba); out: - if (hba->dev_info.b_rpm_dev_flush_capable) { - schedule_delayed_work(&hba->rpm_dev_flush_recheck_work, - msecs_to_jiffies(RPM_DEV_FLUSH_RECHECK_WORK_DELAY_MS)); - } - hba->pm_op_in_progress = 0; if (ret) @@ -8846,10 +9142,8 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) { int ret; - enum uic_link_state old_link_state; hba->pm_op_in_progress = 1; - old_link_state = hba->uic_link_state; ufshcd_hba_vreg_set_hpm(hba); ret = ufshcd_vreg_set_hpm(hba); @@ -8901,43 +9195,14 @@ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) goto vendor_suspend; } - if (!ufshcd_is_ufs_dev_active(hba)) { - ret = ufshcd_set_dev_pwr_mode(hba, UFS_ACTIVE_PWR_MODE); - if (ret) - goto set_old_link_state; - } - - if (ufshcd_keep_autobkops_enabled_except_suspend(hba)) - ufshcd_enable_auto_bkops(hba); - else - /* - * If BKOPs operations are urgently needed at this moment then - * keep auto-bkops enabled or else disable it. - */ - ufshcd_urgent_bkops(hba); - - hba->clk_gating.is_suspended = false; - - if (ufshcd_is_clkscaling_supported(hba)) - ufshcd_clk_scaling_suspend(hba, false); - /* Enable Auto-Hibernate if configured */ ufshcd_auto_hibern8_enable(hba); - if (hba->dev_info.b_rpm_dev_flush_capable) { - hba->dev_info.b_rpm_dev_flush_capable = false; - cancel_delayed_work(&hba->rpm_dev_flush_recheck_work); - } - - ufshcd_clear_ua_wluns(hba); - /* Schedule clock gating in case of no access to UFS device yet */ ufshcd_release(hba); goto out; -set_old_link_state: - ufshcd_link_state_transition(hba, old_link_state, 0); vendor_suspend: ufshcd_vops_suspend(hba, pm_op); disable_irq_and_vops_clks: diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index ee61f82..7662387 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -72,6 +72,8 @@ enum ufs_event_type { UFS_EVT_LINK_STARTUP_FAIL, UFS_EVT_RESUME_ERR, UFS_EVT_SUSPEND_ERR, + UFS_EVT_WL_SUSP_ERR, + UFS_EVT_WL_RES_ERR, /* abnormal events */ UFS_EVT_DEV_RESET, @@ -841,6 +843,8 @@ struct ufs_hba { #ifdef CONFIG_DEBUG_FS struct dentry *debugfs_root; #endif + bool init_done; + u32 luns_avail; }; /* Returns true if clocks can be gated. Otherwise false */ diff --git a/include/trace/events/ufs.h b/include/trace/events/ufs.h index e151477..d9d233b 100644 --- a/include/trace/events/ufs.h +++ b/include/trace/events/ufs.h @@ -246,6 +246,26 @@ DEFINE_EVENT(ufshcd_template, ufshcd_init, int dev_state, int link_state), TP_ARGS(dev_name, err, usecs, dev_state, link_state)); +DEFINE_EVENT(ufshcd_template, ufshcd_wl_suspend, + TP_PROTO(const char *dev_name, int err, s64 usecs, + int dev_state, int link_state), + TP_ARGS(dev_name, err, usecs, dev_state, link_state)); + +DEFINE_EVENT(ufshcd_template, ufshcd_wl_resume, + TP_PROTO(const char *dev_name, int err, s64 usecs, + int dev_state, int link_state), + TP_ARGS(dev_name, err, usecs, dev_state, link_state)); + +DEFINE_EVENT(ufshcd_template, ufshcd_wl_runtime_suspend, + TP_PROTO(const char *dev_name, int err, s64 usecs, + int dev_state, int link_state), + TP_ARGS(dev_name, err, usecs, dev_state, link_state)); + +DEFINE_EVENT(ufshcd_template, ufshcd_wl_runtime_resume, + TP_PROTO(const char *dev_name, int err, s64 usecs, + int dev_state, int link_state), + TP_ARGS(dev_name, err, usecs, dev_state, link_state)); + TRACE_EVENT(ufshcd_command, TP_PROTO(const char *dev_name, enum ufs_trace_str_t str_t, unsigned int tag, u32 doorbell, int transfer_len, u32 intr,