From patchwork Wed Apr 14 18:58:27 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: 422106 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham 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 0B836C433ED for ; Wed, 14 Apr 2021 18:59:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D60C561222 for ; Wed, 14 Apr 2021 18:59:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353298AbhDNS7n (ORCPT ); Wed, 14 Apr 2021 14:59:43 -0400 Received: from labrats.qualcomm.com ([199.106.110.90]:17217 "EHLO labrats.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1353297AbhDNS7l (ORCPT ); Wed, 14 Apr 2021 14:59:41 -0400 IronPort-SDR: 4EneQ/4FMDQxkhYe+XRhTTy4aP7H01L/5J3LCojD04Dh6avD6FfasQunjmz0j82HDc/hs9+UyI CG2DSq/9CDfmUFO0RwZnIhqFgwYEnWgA5Fvk6d518DGu4oHC+2ANX6pjNaDCdO8cF6UH39VMrA xsgRvKd8T9XsHJ+TLqPJTK80ZdyyVjwf4N7jpTtUxthQKb2bSU+MNRGDFn8srx5R0iBga3+jt6 sIWYiniGaOIloqqdkRZJ3jMZAL8d3aG87ga9YrshnB4W01N9vRGTBfFkJQgbfNipcrFqoAQjVB xns= X-IronPort-AV: E=Sophos;i="5.82,223,1613462400"; d="scan'208";a="29750617" Received: from unknown (HELO ironmsg03-sd.qualcomm.com) ([10.53.140.143]) by labrats.qualcomm.com with ESMTP; 14 Apr 2021 11:59:14 -0700 X-QCInternal: smtphost Received: from wsp769891wss.qualcomm.com (HELO stor-presley.qualcomm.com) ([192.168.140.85]) by ironmsg03-sd.qualcomm.com with ESMTP; 14 Apr 2021 11:59:13 -0700 Received: by stor-presley.qualcomm.com (Postfix, from userid 92687) id 359172115D; Wed, 14 Apr 2021 11:59:13 -0700 (PDT) From: Asutosh Das To: cang@codeaurora.org, martin.petersen@oracle.com, adrian.hunter@intel.com, linux-scsi@vger.kernel.org Cc: Asutosh Das , linux-arm-msm@vger.kernel.org, Alim Akhtar , Avri Altman , "James E.J. Bottomley" , Pedro Sousa , Krzysztof Kozlowski , Stanley Chu , Andy Gross , Bjorn Andersson , Steven Rostedt , Ingo Molnar , Matthias Brugger , Lee Jones , Bean Huo , Kiwoong Kim , Yue Hu , Wei Yongjun , "Gustavo A. R. Silva" , Dinghao Liu , Jaegeuk Kim , Satya Tangirala , linux-kernel@vger.kernel.org (open list), linux-arm-kernel@lists.infradead.org (moderated list:ARM/SAMSUNG S3C, S5P AND EXYNOS ARM ARCHITECTURES), linux-samsung-soc@vger.kernel.org (open list:ARM/SAMSUNG S3C, S5P AND EXYNOS ARM ARCHITECTURES), linux-mediatek@lists.infradead.org (moderated list:UNIVERSAL FLASH STORAGE HOST CONTROLLER DRIVER...) Subject: [PATCH v18 1/2] scsi: ufs: Enable power management for wlun Date: Wed, 14 Apr 2021 11:58:27 -0700 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-samsung-soc@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 (START_STOP_UNIT) 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 --- drivers/scsi/ufs/cdns-pltfrm.c | 2 + drivers/scsi/ufs/tc-dwc-g210-pci.c | 2 + drivers/scsi/ufs/ufs-debugfs.c | 6 +- drivers/scsi/ufs/ufs-debugfs.h | 2 +- drivers/scsi/ufs/ufs-exynos.c | 2 + drivers/scsi/ufs/ufs-hisi.c | 2 + drivers/scsi/ufs/ufs-mediatek.c | 12 +- drivers/scsi/ufs/ufs-qcom.c | 2 + drivers/scsi/ufs/ufs_bsg.c | 6 +- drivers/scsi/ufs/ufshcd-pci.c | 36 +- drivers/scsi/ufs/ufshcd.c | 692 +++++++++++++++++++++++++------------ drivers/scsi/ufs/ufshcd.h | 21 ++ include/trace/events/ufs.h | 20 ++ 13 files changed, 549 insertions(+), 256 deletions(-) diff --git a/drivers/scsi/ufs/cdns-pltfrm.c b/drivers/scsi/ufs/cdns-pltfrm.c index 13d9204..b9105e4 100644 --- a/drivers/scsi/ufs/cdns-pltfrm.c +++ b/drivers/scsi/ufs/cdns-pltfrm.c @@ -323,6 +323,8 @@ static const struct dev_pm_ops cdns_ufs_dev_pm_ops = { .runtime_suspend = ufshcd_pltfrm_runtime_suspend, .runtime_resume = ufshcd_pltfrm_runtime_resume, .runtime_idle = ufshcd_pltfrm_runtime_idle, + .prepare = ufshcd_suspend_prepare, + .complete = ufshcd_resume_complete, }; static struct platform_driver cdns_ufs_pltfrm_driver = { diff --git a/drivers/scsi/ufs/tc-dwc-g210-pci.c b/drivers/scsi/ufs/tc-dwc-g210-pci.c index 67a6a61..b01db12 100644 --- a/drivers/scsi/ufs/tc-dwc-g210-pci.c +++ b/drivers/scsi/ufs/tc-dwc-g210-pci.c @@ -148,6 +148,8 @@ static const struct dev_pm_ops tc_dwc_g210_pci_pm_ops = { .runtime_suspend = tc_dwc_g210_pci_runtime_suspend, .runtime_resume = tc_dwc_g210_pci_runtime_resume, .runtime_idle = tc_dwc_g210_pci_runtime_idle, + .prepare = ufshcd_suspend_prepare, + .complete = ufshcd_resume_complete, }; static const struct pci_device_id tc_dwc_g210_pci_tbl[] = { diff --git a/drivers/scsi/ufs/ufs-debugfs.c b/drivers/scsi/ufs/ufs-debugfs.c index ced9ef4..4e1ff20 100644 --- a/drivers/scsi/ufs/ufs-debugfs.c +++ b/drivers/scsi/ufs/ufs-debugfs.c @@ -13,7 +13,7 @@ void __init ufs_debugfs_init(void) ufs_debugfs_root = debugfs_create_dir("ufshcd", NULL); } -void __exit ufs_debugfs_exit(void) +void ufs_debugfs_exit(void) { debugfs_remove_recursive(ufs_debugfs_root); } @@ -60,14 +60,14 @@ __acquires(&hba->host_sem) up(&hba->host_sem); return -EBUSY; } - pm_runtime_get_sync(hba->dev); + ufshcd_rpm_get_sync(hba); return 0; } static void ufs_debugfs_put_user_access(struct ufs_hba *hba) __releases(&hba->host_sem) { - pm_runtime_put_sync(hba->dev); + ufshcd_rpm_put_sync(hba); up(&hba->host_sem); } diff --git a/drivers/scsi/ufs/ufs-debugfs.h b/drivers/scsi/ufs/ufs-debugfs.h index 3ca29d3..97548a3 100644 --- a/drivers/scsi/ufs/ufs-debugfs.h +++ b/drivers/scsi/ufs/ufs-debugfs.h @@ -9,7 +9,7 @@ struct ufs_hba; #ifdef CONFIG_DEBUG_FS void __init ufs_debugfs_init(void); -void __exit ufs_debugfs_exit(void); +void ufs_debugfs_exit(void); void ufs_debugfs_hba_init(struct ufs_hba *hba); void ufs_debugfs_hba_exit(struct ufs_hba *hba); void ufs_debugfs_exception_event(struct ufs_hba *hba, u16 status); diff --git a/drivers/scsi/ufs/ufs-exynos.c b/drivers/scsi/ufs/ufs-exynos.c index 70647ea..49a918c 100644 --- a/drivers/scsi/ufs/ufs-exynos.c +++ b/drivers/scsi/ufs/ufs-exynos.c @@ -1267,6 +1267,8 @@ static const struct dev_pm_ops exynos_ufs_pm_ops = { .runtime_suspend = ufshcd_pltfrm_runtime_suspend, .runtime_resume = ufshcd_pltfrm_runtime_resume, .runtime_idle = ufshcd_pltfrm_runtime_idle, + .prepare = ufshcd_suspend_prepare, + .complete = ufshcd_resume_complete, }; static struct platform_driver exynos_ufs_pltform = { diff --git a/drivers/scsi/ufs/ufs-hisi.c b/drivers/scsi/ufs/ufs-hisi.c index 0aa5813..d463b44 100644 --- a/drivers/scsi/ufs/ufs-hisi.c +++ b/drivers/scsi/ufs/ufs-hisi.c @@ -574,6 +574,8 @@ static const struct dev_pm_ops ufs_hisi_pm_ops = { .runtime_suspend = ufshcd_pltfrm_runtime_suspend, .runtime_resume = ufshcd_pltfrm_runtime_resume, .runtime_idle = ufshcd_pltfrm_runtime_idle, + .prepare = ufshcd_suspend_prepare, + .complete = ufshcd_resume_complete, }; static struct platform_driver ufs_hisi_pltform = { diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c index a981f26..4862a7b 100644 --- a/drivers/scsi/ufs/ufs-mediatek.c +++ b/drivers/scsi/ufs/ufs-mediatek.c @@ -810,12 +810,10 @@ static int ufs_mtk_post_link(struct ufs_hba *hba) /* enable unipro clock gating feature */ ufs_mtk_cfg_unipro_cg(hba, true); - /* configure auto-hibern8 timer to 10ms */ - if (ufshcd_is_auto_hibern8_supported(hba)) { - ufshcd_auto_hibern8_update(hba, - FIELD_PREP(UFSHCI_AHIBERN8_TIMER_MASK, 10) | - FIELD_PREP(UFSHCI_AHIBERN8_SCALE_MASK, 3)); - } + /* will be configured during probe hba */ + if (ufshcd_is_auto_hibern8_supported(hba)) + hba->ahit = FIELD_PREP(UFSHCI_AHIBERN8_TIMER_MASK, 10) | + FIELD_PREP(UFSHCI_AHIBERN8_SCALE_MASK, 3); ufs_mtk_setup_clk_gating(hba); @@ -1097,6 +1095,8 @@ static const struct dev_pm_ops ufs_mtk_pm_ops = { .runtime_suspend = ufshcd_pltfrm_runtime_suspend, .runtime_resume = ufshcd_pltfrm_runtime_resume, .runtime_idle = ufshcd_pltfrm_runtime_idle, + .prepare = ufshcd_suspend_prepare, + .complete = ufshcd_resume_complete, }; static struct platform_driver ufs_mtk_pltform = { diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index 9b711d6..6651b87 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -1556,6 +1556,8 @@ static const struct dev_pm_ops ufs_qcom_pm_ops = { .runtime_suspend = ufshcd_pltfrm_runtime_suspend, .runtime_resume = ufshcd_pltfrm_runtime_resume, .runtime_idle = ufshcd_pltfrm_runtime_idle, + .prepare = ufshcd_suspend_prepare, + .complete = ufshcd_resume_complete, }; static struct platform_driver ufs_qcom_pltform = { diff --git a/drivers/scsi/ufs/ufs_bsg.c b/drivers/scsi/ufs/ufs_bsg.c index 5b2bc1a..39bf204 100644 --- a/drivers/scsi/ufs/ufs_bsg.c +++ b/drivers/scsi/ufs/ufs_bsg.c @@ -97,7 +97,7 @@ static int ufs_bsg_request(struct bsg_job *job) bsg_reply->reply_payload_rcv_len = 0; - pm_runtime_get_sync(hba->dev); + ufshcd_rpm_get_sync(hba); msgcode = bsg_request->msgcode; switch (msgcode) { @@ -106,7 +106,7 @@ static int ufs_bsg_request(struct bsg_job *job) ret = ufs_bsg_alloc_desc_buffer(hba, job, &desc_buff, &desc_len, desc_op); if (ret) { - pm_runtime_put_sync(hba->dev); + ufshcd_rpm_put_sync(hba); goto out; } @@ -138,7 +138,7 @@ static int ufs_bsg_request(struct bsg_job *job) break; } - pm_runtime_put_sync(hba->dev); + ufshcd_rpm_put_sync(hba); if (!desc_buff) goto out; diff --git a/drivers/scsi/ufs/ufshcd-pci.c b/drivers/scsi/ufs/ufshcd-pci.c index 23ee828..e6c334b 100644 --- a/drivers/scsi/ufs/ufshcd-pci.c +++ b/drivers/scsi/ufs/ufshcd-pci.c @@ -410,29 +410,6 @@ static int ufshcd_pci_resume(struct device *dev) return ufshcd_system_resume(dev_get_drvdata(dev)); } -/** - * ufshcd_pci_poweroff - suspend-to-disk poweroff function - * @dev: pointer to PCI device handle - * - * Returns 0 if successful - * Returns non-zero otherwise - */ -static int ufshcd_pci_poweroff(struct device *dev) -{ - struct ufs_hba *hba = dev_get_drvdata(dev); - int spm_lvl = hba->spm_lvl; - int ret; - - /* - * For poweroff we need to set the UFS device to PowerDown mode. - * Force spm_lvl to ensure that. - */ - hba->spm_lvl = 5; - ret = ufshcd_system_suspend(hba); - hba->spm_lvl = spm_lvl; - return ret; -} - #endif /* !CONFIG_PM_SLEEP */ #ifdef CONFIG_PM @@ -533,17 +510,14 @@ ufshcd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) } static const struct dev_pm_ops ufshcd_pci_pm_ops = { -#ifdef CONFIG_PM_SLEEP - .suspend = ufshcd_pci_suspend, - .resume = ufshcd_pci_resume, - .freeze = ufshcd_pci_suspend, - .thaw = ufshcd_pci_resume, - .poweroff = ufshcd_pci_poweroff, - .restore = ufshcd_pci_resume, -#endif SET_RUNTIME_PM_OPS(ufshcd_pci_runtime_suspend, ufshcd_pci_runtime_resume, ufshcd_pci_runtime_idle) + SET_SYSTEM_SLEEP_PM_OPS(ufshcd_pci_suspend, ufshcd_pci_resume) +#ifdef CONFIG_PM_SLEEP + .prepare = ufshcd_suspend_prepare, + .complete = ufshcd_resume_complete, +#endif }; static const struct pci_device_id ufshcd_pci_tbl[] = { diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 0625da7..0a58c9a 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" @@ -77,6 +78,8 @@ /* Polling time to wait for fDeviceInit */ #define FDEVICEINIT_COMPL_TIMEOUT 1500 /* millisecs */ +#define wlun_dev_to_hba(dv) shost_priv(to_scsi_device(dv)->host) + #define ufshcd_toggle_vreg(_dev, _vreg, _on) \ ({ \ int _ret; \ @@ -1551,7 +1554,7 @@ static ssize_t ufshcd_clkscale_enable_store(struct device *dev, if (value == hba->clk_scaling.is_enabled) goto out; - pm_runtime_get_sync(hba->dev); + ufshcd_rpm_get_sync(hba); ufshcd_hold(hba, false); hba->clk_scaling.is_enabled = value; @@ -1567,7 +1570,7 @@ static ssize_t ufshcd_clkscale_enable_store(struct device *dev, } ufshcd_release(hba); - pm_runtime_put_sync(hba->dev); + ufshcd_rpm_put_sync(hba); out: up(&hba->host_sem); return err ? err : count; @@ -2565,6 +2568,17 @@ 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; @@ -4098,12 +4112,13 @@ void ufshcd_auto_hibern8_update(struct ufs_hba *hba, u32 ahit) } spin_unlock_irqrestore(hba->host->host_lock, flags); - if (update && !pm_runtime_suspended(hba->dev)) { - pm_runtime_get_sync(hba->dev); + if (update && + !pm_runtime_suspended(&hba->sdev_ufs_device->sdev_gendev)) { + ufshcd_rpm_get_sync(hba); ufshcd_hold(hba, false); ufshcd_auto_hibern8_enable(hba); ufshcd_release(hba); - pm_runtime_put(hba->dev); + ufshcd_rpm_put_sync(hba); } } EXPORT_SYMBOL_GPL(ufshcd_auto_hibern8_update); @@ -4801,6 +4816,40 @@ 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 + */ +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|DL_FLAG_RPM_ACTIVE); + 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) { + ufshcd_rpm_put(hba); + return; + } + } else { + /* device wlun is probed */ + hba->luns_avail--; + } +} + +/** * ufshcd_slave_alloc - handle initial SCSI device configurations * @sdev: pointer to SCSI device * @@ -4831,6 +4880,8 @@ 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; } @@ -4862,8 +4913,13 @@ static int ufshcd_slave_configure(struct scsi_device *sdev) blk_queue_update_dma_pad(q, PRDT_DATA_BYTE_COUNT_PAD - 1); if (hba->quirks & UFSHCD_QUIRK_ALIGN_SG_WITH_PAGE_SIZE) blk_queue_update_dma_alignment(q, PAGE_SIZE - 1); - - if (ufshcd_is_rpm_autosuspend_allowed(hba)) + /* + * Block runtime-pm until all consumers are added. + * Refer ufshcd_setup_links(). + */ + if (is_device_wlun(sdev)) + pm_runtime_get_noresume(&sdev->sdev_gendev); + else if (ufshcd_is_rpm_autosuspend_allowed(hba)) sdev->rpm_autosuspend = 1; ufshcd_crypto_setup_rq_keyslot_manager(hba, q); @@ -4979,15 +5035,9 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) */ if (!hba->pm_op_in_progress && !ufshcd_eh_in_progress(hba) && - ufshcd_is_exception_event(lrbp->ucd_rsp_ptr) && - schedule_work(&hba->eeh_work)) { - /* - * Prevent suspend once eeh_work is scheduled - * to avoid deadlock between ufshcd_suspend - * and exception event handler. - */ - pm_runtime_get_noresume(hba->dev); - } + ufshcd_is_exception_event(lrbp->ucd_rsp_ptr)) + /* Flushed in suspend */ + schedule_work(&hba->eeh_work); break; case UPIU_TRANSACTION_REJECT_UPIU: /* TODO: handle Reject UPIU Response */ @@ -5586,8 +5636,8 @@ 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); + ufshcd_rpm_get_sync(hba); + ufshcd_rpm_put_sync(hba); } /** @@ -5604,7 +5654,6 @@ static void ufshcd_exception_event_handler(struct work_struct *work) u32 status = 0; hba = container_of(work, struct ufs_hba, eeh_work); - pm_runtime_get_sync(hba->dev); ufshcd_scsi_block_requests(hba); err = ufshcd_get_ee_status(hba, &status); if (err) { @@ -5621,14 +5670,6 @@ static void ufshcd_exception_event_handler(struct work_struct *work) ufs_debugfs_exception_event(hba, status); out: ufshcd_scsi_unblock_requests(hba); - /* - * pm_runtime_get_noresume is called while scheduling - * eeh_work to avoid suspend racing with exception work. - * Hence decrement usage counter using pm_runtime_put_noidle - * to allow suspend on completion of exception event handler. - */ - pm_runtime_put_noidle(hba->dev); - pm_runtime_put(hba->dev); return; } @@ -5753,12 +5794,13 @@ static void ufshcd_clk_scaling_suspend(struct ufs_hba *hba, bool suspend) static void ufshcd_err_handling_prepare(struct ufs_hba *hba) { - pm_runtime_get_sync(hba->dev); - if (pm_runtime_status_suspended(hba->dev) || hba->is_sys_suspended) { + ufshcd_rpm_get_sync(hba); + if (pm_runtime_status_suspended(&hba->sdev_ufs_device->sdev_gendev) || + hba->is_sys_suspended) { enum ufs_pm_op pm_op; /* - * Don't assume anything of pm_runtime_get_sync(), if + * Don't assume anything of resume, if * resume fails, irq and clocks can be OFF, and powers * can be OFF or in LPM. */ @@ -5794,7 +5836,7 @@ static void ufshcd_err_handling_unprepare(struct ufs_hba *hba) if (ufshcd_is_clkscaling_supported(hba)) ufshcd_clk_scaling_suspend(hba, false); ufshcd_clear_ua_wluns(hba); - pm_runtime_put(hba->dev); + ufshcd_rpm_put(hba); } static inline bool ufshcd_err_handling_should_stop(struct ufs_hba *hba) @@ -5815,14 +5857,18 @@ static void ufshcd_recover_pm_error(struct ufs_hba *hba) hba->is_sys_suspended = false; /* - * Set RPM status of hba device to RPM_ACTIVE, + * Set RPM status of wlun device to RPM_ACTIVE, * this also clears its runtime error. */ - ret = pm_runtime_set_active(hba->dev); + ret = pm_runtime_set_active(&hba->sdev_ufs_device->sdev_gendev); + + /* hba device might have a runtime error otherwise */ + if (ret) + ret = pm_runtime_set_active(hba->dev); /* - * If hba device had runtime error, we also need to resume those - * scsi devices under hba in case any of them has failed to be - * resumed due to hba runtime resume failure. This is to unblock + * If wlun device had runtime error, we also need to resume those + * consumer scsi devices in case any of them has failed to be + * resumed due to supplier runtime resume failure. This is to unblock * blk_queue_enter in case there are bios waiting inside it. */ if (!ret) { @@ -7246,7 +7292,6 @@ static int ufshcd_scsi_add_wlus(struct ufs_hba *hba) hba->sdev_ufs_device = NULL; goto out; } - ufshcd_blk_pm_runtime_init(hba->sdev_ufs_device); scsi_device_put(hba->sdev_ufs_device); hba->sdev_rpmb = __scsi_add_device(hba->host, 0, 0, @@ -7410,6 +7455,9 @@ 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); @@ -7887,6 +7935,7 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, bool async) ufshcd_set_ufs_dev_active(hba); ufshcd_force_reset_auto_bkops(hba); hba->wlun_dev_clr_ua = true; + hba->wlun_rpmb_clr_ua = true; /* Gear up to HS gear if supported */ if (hba->max_pwr_info.is_valid) { @@ -8472,7 +8521,8 @@ 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; @@ -8647,23 +8697,7 @@ 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; @@ -8671,7 +8705,7 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) enum ufs_dev_pwr_mode req_dev_pwr_mode; enum uic_link_state req_link_state; - hba->pm_op_in_progress = 1; + hba->pm_op_in_progress = true; if (!ufshcd_is_shutdown_pm(pm_op)) { pm_lvl = ufshcd_is_runtime_pm(pm_op) ? hba->rpm_lvl : hba->spm_lvl; @@ -8694,17 +8728,17 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) if (req_dev_pwr_mode == UFS_ACTIVE_PWR_MODE && req_link_state == UIC_LINK_ACTIVE_STATE) { - goto disable_clks; + goto vops_suspend; } 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)) { @@ -8716,7 +8750,7 @@ 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); @@ -8744,7 +8778,7 @@ 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; + goto enable_scaling; } } @@ -8757,7 +8791,7 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) if (ret) goto set_dev_active; -disable_clks: +vops_suspend: /* * Call vendor specific suspend callback. As these callbacks may access * vendor specific host controller register space call them before the @@ -8766,28 +8800,9 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) ret = ufshcd_vops_suspend(hba, pm_op); if (ret) goto set_link_active; - /* - * Disable the host irq as host controller as there won't be any - * host controller transaction expected till resume. - */ - ufshcd_disable_irq(hba); - - ufshcd_setup_clocks(hba, false); - - if (ufshcd_is_clkgating_allowed(hba)) { - hba->clk_gating.state = CLKS_OFF; - trace_ufshcd_clk_gating(dev_name(hba->dev), - hba->clk_gating.state); - } - - ufshcd_vreg_set_lpm(hba); - - /* Put the host controller in low power mode if possible */ - ufshcd_hba_vreg_set_lpm(hba); 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 @@ -8809,57 +8824,32 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) } if (!ufshcd_set_dev_pwr_mode(hba, UFS_ACTIVE_PWR_MODE)) ufshcd_disable_auto_bkops(hba); -enable_gating: +enable_scaling: 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) - ufshcd_update_evt_hist(hba, UFS_EVT_SUSPEND_ERR, (u32)ret); + if (ret) { + ufshcd_update_evt_hist(hba, UFS_EVT_WL_SUSP_ERR, (u32)ret); + hba->clk_gating.is_suspended = false; + ufshcd_release(hba); + } + hba->pm_op_in_progress = false; return ret; } -/** - * ufshcd_resume - helper function for resume operations - * @hba: per adapter instance - * @pm_op: runtime PM or system PM - * - * This function basically brings the UFS device, UniPro link and controller - * to active state. - * - * Returns 0 for success and non-zero for failure - */ -static int ufshcd_resume(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) { int ret; - enum uic_link_state old_link_state; + enum uic_link_state old_link_state = hba->uic_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); - if (ret) - goto out; - - /* Make sure clocks are enabled before accessing controller */ - ret = ufshcd_setup_clocks(hba, true); - if (ret) - goto disable_vreg; - - /* enable the host irq as host controller would be active soon */ - ufshcd_enable_irq(hba); + hba->pm_op_in_progress = true; /* * Call vendor specific resume callback. As these callbacks may access @@ -8868,7 +8858,7 @@ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) */ ret = ufshcd_vops_resume(hba, pm_op); if (ret) - goto disable_irq_and_vops_clks; + goto out; /* For DeepSleep, the only supported option is to have the link off */ WARN_ON(ufshcd_is_ufs_dev_deepsleep(hba) && !ufshcd_is_link_off(hba)); @@ -8916,42 +8906,214 @@ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) if (hba->ee_usr_mask) ufshcd_write_ee_control(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->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); } - ufshcd_clear_ua_wluns(hba); - - /* Schedule clock gating in case of no access to UFS device yet */ - ufshcd_release(hba); - + /* Enable Auto-Hibernate if configured */ + ufshcd_auto_hibern8_enable(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: +out: + if (ret) + ufshcd_update_evt_hist(hba, UFS_EVT_WL_RES_ERR, (u32)ret); + hba->clk_gating.is_suspended = false; + ufshcd_release(hba); + hba->pm_op_in_progress = false; + 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); + + 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 = 0; + ktime_t start = ktime_get(); + + hba = shost_priv(sdev->host); + + 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; +} + +#ifdef CONFIG_PM_SLEEP +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(); + + hba = shost_priv(sdev->host); + down(&hba->host_sem); + ret = __ufshcd_wl_suspend(hba, UFS_SYSTEM_PM); + if (ret) { + dev_err(&sdev->sdev_gendev, "%s failed: %d\n", __func__, ret); + up(&hba->host_sem); + } else { + hba->is_sys_suspended = true; + } + + 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 = 0; + ktime_t start = ktime_get(); + + if (pm_runtime_suspended(dev)) + goto out; + + 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); +out: + 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); + if (!ret) + hba->is_sys_suspended = false; + up(&hba->host_sem); + return ret; +} +#endif + +static void ufshcd_wl_shutdown(struct device *dev) +{ + struct scsi_device *sdev = to_scsi_device(dev); + struct ufs_hba *hba; + + hba = shost_priv(sdev->host); + + down(&hba->host_sem); + hba->shutting_down = true; + up(&hba->host_sem); + + /* Turn on everything while shutting down */ + ufshcd_rpm_get_sync(hba); + scsi_device_quiesce(sdev); + shost_for_each_device(sdev, hba->host) { + if (sdev == hba->sdev_ufs_device) + continue; + scsi_device_quiesce(sdev); + } + __ufshcd_wl_suspend(hba, UFS_SHUTDOWN_PM); +} + +/** + * ufshcd_suspend - helper function for suspend operations + * @hba: per adapter instance + * + * This function will put disable irqs, turn off clocks + * and set vreg and hba-vreg in lpm mode. + * Also check the description of __ufshcd_wl_suspend(). + */ +static int ufshcd_suspend(struct ufs_hba *hba) +{ + int ret; + + if (!hba->is_powered) + return 0; + /* + * Disable the host irq as host controller as there won't be any + * host controller transaction expected till resume. + */ ufshcd_disable_irq(hba); - ufshcd_setup_clocks(hba, false); + ret = ufshcd_setup_clocks(hba, false); + if (ret) { + ufshcd_enable_irq(hba); + return ret; + } if (ufshcd_is_clkgating_allowed(hba)) { hba->clk_gating.state = CLKS_OFF; trace_ufshcd_clk_gating(dev_name(hba->dev), hba->clk_gating.state); } + + ufshcd_vreg_set_lpm(hba); + /* Put the host controller in low power mode if possible */ + ufshcd_hba_vreg_set_lpm(hba); + return ret; +} + +/** + * ufshcd_resume - helper function for resume operations + * @hba: per adapter instance + * + * This function basically turns on the regulators, clocks and + * irqs of the hba. + * Also check the description of __ufshcd_wl_resume(). + * + * Returns 0 for success and non-zero for failure + */ +static int ufshcd_resume(struct ufs_hba *hba) +{ + int ret; + + if (!hba->is_powered) + return 0; + + ufshcd_hba_vreg_set_hpm(hba); + ret = ufshcd_vreg_set_hpm(hba); + if (ret) + goto out; + + /* Make sure clocks are enabled before accessing controller */ + ret = ufshcd_setup_clocks(hba, true); + if (ret) + goto disable_vreg; + + /* enable the host irq as host controller would be active soon */ + ufshcd_enable_irq(hba); + goto out; + disable_vreg: ufshcd_vreg_set_lpm(hba); out: - hba->pm_op_in_progress = 0; if (ret) ufshcd_update_evt_hist(hba, UFS_EVT_RESUME_ERR, (u32)ret); return ret; @@ -8962,49 +9124,23 @@ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) * @hba: per adapter instance * * Check the description of ufshcd_suspend() function for more details. + * Also check the description of __ufshcd_wl_suspend(). * * Returns 0 for success and non-zero for failure */ int ufshcd_system_suspend(struct ufs_hba *hba) { - int ret = 0; + int ret; ktime_t start = ktime_get(); - down(&hba->host_sem); - - if (!hba->is_powered) - return 0; - - if ((ufs_get_pm_lvl_to_dev_pwr_mode(hba->spm_lvl) == - hba->curr_dev_pwr_mode) && - (ufs_get_pm_lvl_to_link_pwr_state(hba->spm_lvl) == - hba->uic_link_state) && - !hba->dev_info.b_rpm_dev_flush_capable) + if (pm_runtime_suspended(hba->dev)) goto out; - if (pm_runtime_suspended(hba->dev)) { - /* - * UFS device and/or UFS link low power states during runtime - * suspend seems to be different than what is expected during - * system suspend. Hence runtime resume the devic & link and - * let the system suspend low power states to take effect. - * TODO: If resume takes longer time, we might have optimize - * it in future by not resuming everything if possible. - */ - ret = ufshcd_runtime_resume(hba); - if (ret) - goto out; - } - - ret = ufshcd_suspend(hba, UFS_SYSTEM_PM); + ret = ufshcd_suspend(hba); out: trace_ufshcd_system_suspend(dev_name(hba->dev), ret, ktime_to_us(ktime_sub(ktime_get(), start)), hba->curr_dev_pwr_mode, hba->uic_link_state); - if (!ret) - hba->is_sys_suspended = true; - else - up(&hba->host_sem); return ret; } EXPORT_SYMBOL(ufshcd_system_suspend); @@ -9018,24 +9154,19 @@ EXPORT_SYMBOL(ufshcd_system_suspend); int ufshcd_system_resume(struct ufs_hba *hba) { - int ret = 0; + int ret; ktime_t start = ktime_get(); - if (!hba->is_powered || pm_runtime_suspended(hba->dev)) - /* - * Let the runtime resume take care of resuming - * if runtime suspended. - */ + if (pm_runtime_suspended(hba->dev)) goto out; - else - ret = ufshcd_resume(hba, UFS_SYSTEM_PM); + + ret = ufshcd_resume(hba); + out: trace_ufshcd_system_resume(dev_name(hba->dev), ret, ktime_to_us(ktime_sub(ktime_get(), start)), hba->curr_dev_pwr_mode, hba->uic_link_state); - if (!ret) - hba->is_sys_suspended = false; - up(&hba->host_sem); + return ret; } EXPORT_SYMBOL(ufshcd_system_resume); @@ -9045,19 +9176,17 @@ EXPORT_SYMBOL(ufshcd_system_resume); * @hba: per adapter instance * * Check the description of ufshcd_suspend() function for more details. + * Also check the description of __ufshcd_wl_suspend(). * * Returns 0 for success and non-zero for failure */ int ufshcd_runtime_suspend(struct ufs_hba *hba) { - int ret = 0; + int ret; ktime_t start = ktime_get(); - if (!hba->is_powered) - goto out; - else - ret = ufshcd_suspend(hba, UFS_RUNTIME_PM); -out: + ret = ufshcd_suspend(hba); + trace_ufshcd_runtime_suspend(dev_name(hba->dev), ret, ktime_to_us(ktime_sub(ktime_get(), start)), hba->curr_dev_pwr_mode, hba->uic_link_state); @@ -9069,33 +9198,19 @@ EXPORT_SYMBOL(ufshcd_runtime_suspend); * ufshcd_runtime_resume - runtime resume routine * @hba: per adapter instance * - * This function basically brings the UFS device, UniPro link and controller + * This function basically brings controller * to active state. Following operations are done in this function: * * 1. Turn on all the controller related clocks - * 2. Bring the UniPro link out of Hibernate state - * 3. If UFS device is in sleep state, turn ON VCC rail and bring the UFS device - * to active state. - * 4. If auto-bkops is enabled on the device, disable it. - * - * So following would be the possible power state after this function return - * successfully: - * S1: UFS device in Active state with VCC rail ON - * UniPro link in Active state - * All the UFS/UniPro controller clocks are ON - * - * Returns 0 for success and non-zero for failure + * 2. Turn ON VCC rail */ int ufshcd_runtime_resume(struct ufs_hba *hba) { - int ret = 0; + int ret; ktime_t start = ktime_get(); - if (!hba->is_powered) - goto out; - else - ret = ufshcd_resume(hba, UFS_RUNTIME_PM); -out: + ret = ufshcd_resume(hba); + trace_ufshcd_runtime_resume(dev_name(hba->dev), ret, ktime_to_us(ktime_sub(ktime_get(), start)), hba->curr_dev_pwr_mode, hba->uic_link_state); @@ -9113,30 +9228,20 @@ EXPORT_SYMBOL(ufshcd_runtime_idle); * ufshcd_shutdown - shutdown routine * @hba: per adapter instance * - * This function would power off both UFS device and UFS link. + * This function would turn off both UFS device and UFS hba + * regulators. It would also disable clocks. * * Returns 0 always to allow force shutdown even in case of errors. */ int ufshcd_shutdown(struct ufs_hba *hba) { - int ret = 0; - - down(&hba->host_sem); - hba->shutting_down = true; - up(&hba->host_sem); - - if (!hba->is_powered) - goto out; - if (ufshcd_is_ufs_dev_poweroff(hba) && ufshcd_is_link_off(hba)) goto out; pm_runtime_get_sync(hba->dev); - ret = ufshcd_suspend(hba, UFS_SHUTDOWN_PM); + ufshcd_suspend(hba); out: - if (ret) - dev_err(hba->dev, "%s failed, err %d\n", __func__, ret); hba->is_powered = false; /* allow force shutdown even in case of errors */ return 0; @@ -9150,6 +9255,8 @@ EXPORT_SYMBOL(ufshcd_shutdown); */ void ufshcd_remove(struct ufs_hba *hba) { + if (hba->sdev_ufs_device) + ufshcd_rpm_get_sync(hba); ufs_bsg_remove(hba); ufs_sysfs_remove_nodes(hba->dev); blk_cleanup_queue(hba->tmf_queue); @@ -9453,15 +9560,176 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq) } EXPORT_SYMBOL_GPL(ufshcd_init); +void ufshcd_resume_complete(struct device *dev) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + + ufshcd_rpm_put(hba); +} +EXPORT_SYMBOL_GPL(ufshcd_resume_complete); + +int ufshcd_suspend_prepare(struct device *dev) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + + /* + * SCSI assumes that runtime-pm and system-pm for scsi drivers + * are same. And it doesn't wake up the device for system-suspend + * if it's runtime suspended. But ufs doesn't follow that. + * The rpm-lvl and spm-lvl can be different in ufs. + * Force it to honor system-suspend. + * Refer ufshcd_resume_complete() + */ + ufshcd_rpm_get_sync(hba); + + return 0; +} +EXPORT_SYMBOL_GPL(ufshcd_suspend_prepare); + +#ifdef CONFIG_PM_SLEEP +static int ufshcd_wl_poweroff(struct device *dev) +{ + struct scsi_device *sdev = to_scsi_device(dev); + struct ufs_hba *hba = shost_priv(sdev->host); + + __ufshcd_wl_suspend(hba, UFS_SHUTDOWN_PM); + return 0; +} +#endif + +static int ufshcd_wl_probe(struct device *dev) +{ + struct scsi_device *sdev = to_scsi_device(dev); + + if (!is_device_wlun(sdev)) + return -ENODEV; + + blk_pm_runtime_init(sdev->request_queue, dev); + pm_runtime_set_autosuspend_delay(dev, 0); + pm_runtime_allow(dev); + + return 0; +} + +static int ufshcd_wl_remove(struct device *dev) +{ + pm_runtime_forbid(dev); + return 0; +} + +static const struct dev_pm_ops ufshcd_wl_pm_ops = { +#ifdef CONFIG_PM_SLEEP + .suspend = ufshcd_wl_suspend, + .resume = ufshcd_wl_resume, + .freeze = ufshcd_wl_suspend, + .thaw = ufshcd_wl_resume, + .poweroff = ufshcd_wl_poweroff, + .restore = ufshcd_wl_resume, +#endif + SET_RUNTIME_PM_OPS(ufshcd_wl_runtime_suspend, ufshcd_wl_runtime_resume, NULL) +}; + +/** + * ufs_dev_wlun_template - describes ufs device wlun + * ufs-device wlun - used to send pm commands + * All luns 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_dev_wlun_template = { + .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, + }, +}; + +static int ufshcd_rpmb_probe(struct device *dev) +{ + return is_rpmb_wlun(to_scsi_device(dev)) ? 0 : -ENODEV; +} + +static inline int ufshcd_clear_rpmb_uac(struct ufs_hba *hba) +{ + int ret = 0; + + if (!hba->wlun_rpmb_clr_ua) + return 0; + ret = ufshcd_clear_ua_wlun(hba, UFS_UPIU_RPMB_WLUN); + if (!ret) + hba->wlun_rpmb_clr_ua = 0; + return ret; +} + +static int ufshcd_rpmb_runtime_resume(struct device *dev) +{ + struct ufs_hba *hba = wlun_dev_to_hba(dev); + + if (hba->sdev_rpmb) + return ufshcd_clear_rpmb_uac(hba); + return 0; +} + +static int ufshcd_rpmb_resume(struct device *dev) +{ + struct ufs_hba *hba = wlun_dev_to_hba(dev); + + if (hba->sdev_rpmb && !pm_runtime_suspended(dev)) + return ufshcd_clear_rpmb_uac(hba); + return 0; +} + +static const struct dev_pm_ops ufs_rpmb_pm_ops = { + SET_RUNTIME_PM_OPS(NULL, ufshcd_rpmb_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(NULL, ufshcd_rpmb_resume) +}; + +/** + * Describes the ufs rpmb wlun. + * Used only to send uac. + */ +static struct scsi_driver ufs_rpmb_wlun_template = { + .gendrv = { + .name = "ufs_rpmb_wlun", + .owner = THIS_MODULE, + .probe = ufshcd_rpmb_probe, + .pm = &ufs_rpmb_pm_ops, + }, +}; + static int __init ufshcd_core_init(void) { + int ret; + ufs_debugfs_init(); - return 0; + + ret = scsi_register_driver(&ufs_dev_wlun_template.gendrv); + if (ret) + goto debugfs_exit; + + ret = scsi_register_driver(&ufs_rpmb_wlun_template.gendrv); + if (ret) + goto unregister; + + return ret; +unregister: + scsi_unregister_driver(&ufs_dev_wlun_template.gendrv); +debugfs_exit: + ufs_debugfs_exit(); + return ret; } static void __exit ufshcd_core_exit(void) { ufs_debugfs_exit(); + scsi_unregister_driver(&ufs_rpmb_wlun_template.gendrv); + scsi_unregister_driver(&ufs_dev_wlun_template.gendrv); } module_init(ufshcd_core_init); diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 5eb66a8..3a8dc0d 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, @@ -807,6 +809,7 @@ struct ufs_hba { struct list_head clk_list_head; bool wlun_dev_clr_ua; + bool wlun_rpmb_clr_ua; /* Number of requests aborts */ int req_abort_count; @@ -846,6 +849,7 @@ struct ufs_hba { struct delayed_work debugfs_ee_work; u32 debugfs_ee_rate_limit_ms; #endif + u32 luns_avail; }; /* Returns true if clocks can be gated. Otherwise false */ @@ -1105,6 +1109,8 @@ int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba, enum query_opcode desc_op); int ufshcd_wb_toggle(struct ufs_hba *hba, bool enable); +int ufshcd_suspend_prepare(struct device *dev); +void ufshcd_resume_complete(struct device *dev); /* Wrapper functions for safely calling variant operations */ static inline const char *ufshcd_get_var_name(struct ufs_hba *hba) @@ -1309,4 +1315,19 @@ static inline int ufshcd_update_ee_usr_mask(struct ufs_hba *hba, &hba->ee_drv_mask, set, clr); } +static inline int ufshcd_rpm_get_sync(struct ufs_hba *hba) +{ + return pm_runtime_get_sync(&hba->sdev_ufs_device->sdev_gendev); +} + +static inline int ufshcd_rpm_put_sync(struct ufs_hba *hba) +{ + return pm_runtime_put_sync(&hba->sdev_ufs_device->sdev_gendev); +} + +static inline int ufshcd_rpm_put(struct ufs_hba *hba) +{ + return pm_runtime_put(&hba->sdev_ufs_device->sdev_gendev); +} + #endif /* End of Header */ diff --git a/include/trace/events/ufs.h b/include/trace/events/ufs.h index 1cb6f1a..599739e 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,