| Message ID | 0576d6eae15486740c25767e2d8805f7e94eb79d.1614725302.git.asutoshd@codeaurora.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Enable power management for ufs wlun | expand |
On 3/03/21 12:52 am, Asutosh Das wrote: > 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 <cang@codeaurora.org> > Signed-off-by: Can Guo <cang@codeaurora.org> > Signed-off-by: Asutosh Das <asutoshd@codeaurora.org> It looks good, but still a few further comments below. Also, do you think ufshcd_err_handling_prepare()/unprepare() need changes? And ufshcd_recover_pm_error()? And maybe ufshcd_auto_hibern8_update() when it is called from ufs_sysfs.c? > --- > drivers/scsi/ufs/cdns-pltfrm.c | 2 + > drivers/scsi/ufs/tc-dwc-g210-pci.c | 2 + > drivers/scsi/ufs/ufs-exynos.c | 2 + > drivers/scsi/ufs/ufs-hisi.c | 2 + > drivers/scsi/ufs/ufs-mediatek.c | 2 + > drivers/scsi/ufs/ufs-qcom.c | 2 + > drivers/scsi/ufs/ufs_bsg.c | 6 +- > drivers/scsi/ufs/ufshcd-pci.c | 32 +- > drivers/scsi/ufs/ufshcd.c | 583 +++++++++++++++++++++++++++---------- > drivers/scsi/ufs/ufshcd.h | 7 + > include/trace/events/ufs.h | 20 ++ > 11 files changed, 478 insertions(+), 182 deletions(-) > > diff --git a/drivers/scsi/ufs/cdns-pltfrm.c b/drivers/scsi/ufs/cdns-pltfrm.c > index 149391f..3e70c23 100644 > --- a/drivers/scsi/ufs/cdns-pltfrm.c > +++ b/drivers/scsi/ufs/cdns-pltfrm.c > @@ -319,6 +319,8 @@ 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-exynos.c b/drivers/scsi/ufs/ufs-exynos.c > index 267943a1..45c0b02 100644 > --- a/drivers/scsi/ufs/ufs-exynos.c > +++ b/drivers/scsi/ufs/ufs-exynos.c > @@ -1268,6 +1268,8 @@ 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 c55202b..df1eabb 100644 > --- a/drivers/scsi/ufs/ufs-mediatek.c > +++ b/drivers/scsi/ufs/ufs-mediatek.c > @@ -1097,6 +1097,8 @@ 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 f97d7b0..9aa098a 100644 > --- a/drivers/scsi/ufs/ufs-qcom.c > +++ b/drivers/scsi/ufs/ufs-qcom.c > @@ -1546,6 +1546,8 @@ 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..cbb5a90 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); > + scsi_autopm_get_device(hba->sdev_ufs_device); > > 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); > + scsi_autopm_put_device(hba->sdev_ufs_device); > goto out; > } > > @@ -138,7 +138,7 @@ static int ufs_bsg_request(struct bsg_job *job) > break; > } > > - pm_runtime_put_sync(hba->dev); > + scsi_autopm_put_device(hba->sdev_ufs_device); > > if (!desc_buff) > goto out; > diff --git a/drivers/scsi/ufs/ufshcd-pci.c b/drivers/scsi/ufs/ufshcd-pci.c > index fadd566..50f84bf 100644 > --- a/drivers/scsi/ufs/ufshcd-pci.c > +++ b/drivers/scsi/ufs/ufshcd-pci.c > @@ -247,29 +247,6 @@ 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 > @@ -366,12 +343,9 @@ 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, > + .prepare = ufshcd_suspend_prepare, Please remove extra space before = > + .complete = ufshcd_resume_complete, > + SET_SYSTEM_SLEEP_PM_OPS(ufshcd_pci_suspend, ufshcd_pci_resume) Would you mind putting SET_SYSTEM_SLEEP_PM_OPS above #ifdef CONFIG_PM_SLEEP > #endif > SET_RUNTIME_PM_OPS(ufshcd_pci_runtime_suspend, > ufshcd_pci_runtime_resume, > diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c > index 45624c7..32139dd 100644 > --- a/drivers/scsi/ufs/ufshcd.c > +++ b/drivers/scsi/ufs/ufshcd.c > @@ -16,6 +16,7 @@ > #include <linux/bitfield.h> > #include <linux/blk-pm.h> > #include <linux/blkdev.h> > +#include <scsi/scsi_driver.h> > #include "ufshcd.h" > #include "ufs_quirks.h" > #include "unipro.h" > @@ -78,6 +79,8 @@ > /* 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; \ > @@ -1556,7 +1559,7 @@ 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); > + scsi_autopm_get_device(hba->sdev_ufs_device); > ufshcd_hold(hba, false); > > hba->clk_scaling.is_enabled = value; > @@ -1572,7 +1575,7 @@ static ssize_t ufshcd_clkscale_enable_store(struct device *dev, > } > > ufshcd_release(hba); > - pm_runtime_put_sync(hba->dev); > + scsi_autopm_put_device(hba->sdev_ufs_device); > out: > up(&hba->host_sem); > return err ? err : count; > @@ -2572,6 +2575,17 @@ 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 +4822,41 @@ 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); > + 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); Now that we set zero autosuspend_delay, mark_last_busy has no effect. > + } else { > + /* device wlun is probed */ > + hba->luns_avail--; > + } > +} > + > +/** > * ufshcd_slave_alloc - handle initial SCSI device configurations > * @sdev: pointer to SCSI device > * > @@ -4838,6 +4887,8 @@ 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; > } > > @@ -4985,15 +5036,9 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) > * UFS device needs urgent BKOPs. > */ > if (!hba->pm_op_in_progress && > - 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 */ > @@ -5589,8 +5634,8 @@ 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); > } > > /** > @@ -5607,7 +5652,6 @@ 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) { > @@ -5623,14 +5667,6 @@ static void ufshcd_exception_event_handler(struct work_struct *work) > > 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; > } > > @@ -7207,11 +7243,12 @@ static void ufshcd_set_active_icc_lvl(struct ufs_hba *hba) > > static inline void ufshcd_blk_pm_runtime_init(struct scsi_device *sdev) > { > + int dly = is_device_wlun(sdev) ? 0:RPM_AUTOSUSPEND_DELAY_MS; > + > 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); > + pm_runtime_set_autosuspend_delay(&sdev->sdev_gendev, dly); > scsi_autopm_put_device(sdev); > } > > @@ -7254,6 +7291,15 @@ 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 <rpm_lvl>). Probing of other luns may fail then. > + * Don't allow this suspend until all the luns have been probed. > + * See pm_runtime_mark_last_busy in ufshcd_setup_links. > + */ > + 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 +7463,9 @@ 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); > @@ -7892,6 +7941,7 @@ 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) { > @@ -7964,6 +8014,7 @@ 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 +8526,8 @@ 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; > > @@ -8650,23 +8702,7 @@ 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; > @@ -8674,7 +8710,13 @@ 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; > + /* > + * Is invoked when the device wlun is added to sysfs > + * But by then hba->sdev_ufs_device may not be initialized. > + */ > + if (!hba->init_done) There is a pm_runtime_get_noresume() when sdev_ufs_device is created, and the corresponding pm_runtime_put_noidle() after the last of the device links is created, so it is not obvious what initialization may not have been done. Can you explain a bit more? > + return 0; > + 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; > @@ -8697,17 +8739,17 @@ 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 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 +8761,7 @@ 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); > @@ -8747,7 +8789,7 @@ 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; > } > } > > @@ -8760,7 +8802,6 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) > if (ret) > goto set_dev_active; > > -disable_clks: > /* > * Call vendor specific suspend callback. As these callbacks may access > * vendor specific host controller register space call them before the > @@ -8769,28 +8810,9 @@ 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 > @@ -8812,57 +8834,35 @@ 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; > - > - 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; > + enum uic_link_state old_link_state = hba->uic_link_state; > > - /* Make sure clocks are enabled before accessing controller */ > - ret = ufshcd_setup_clocks(hba, true); > - if (ret) > - goto disable_vreg; > + if (!hba->init_done) > + return 0; > > - /* 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 > @@ -8871,7 +8871,7 @@ 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)); > @@ -8916,31 +8916,147 @@ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) > */ > 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->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); > + 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 = 0; > + ktime_t start = ktime_get(); > + > + if (pm_runtime_suspended(dev)) > + 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; > +} > +#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); > + /* Turn on everything while shutting down */ > + scsi_autopm_get_device(sdev); > + 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 void ufshcd_suspend(struct ufs_hba *hba) > +{ > + hba->pm_op_in_progress = 1; > + > + /* > + * 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)) { > @@ -8948,6 +9064,43 @@ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) > 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); > + hba->pm_op_in_progress = 0; > +} > + > +/** > + * 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; > + > + hba->pm_op_in_progress = 1; > + > + 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: > @@ -8962,6 +9115,7 @@ 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 > */ > @@ -9001,7 +9155,7 @@ int ufshcd_system_suspend(struct ufs_hba *hba) 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) 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; > } The logic above does not belong anymore. > > - ret = ufshcd_suspend(hba, UFS_SYSTEM_PM); > + ufshcd_suspend(hba); > out: > trace_ufshcd_system_suspend(dev_name(hba->dev), ret, > ktime_to_us(ktime_sub(ktime_get(), start)), > @@ -9023,7 +9177,6 @@ EXPORT_SYMBOL(ufshcd_system_suspend); > > int ufshcd_system_resume(struct ufs_hba *hba) > { > - int ret = 0; > ktime_t start = ktime_get(); > > if (!hba) > @@ -9041,15 +9194,15 @@ int ufshcd_system_resume(struct ufs_hba *hba) > */ > goto out; > else > - ret = ufshcd_resume(hba, UFS_SYSTEM_PM); > + ufshcd_resume(hba); > out: > - trace_ufshcd_system_resume(dev_name(hba->dev), ret, > + trace_ufshcd_system_resume(dev_name(hba->dev), 0, > ktime_to_us(ktime_sub(ktime_get(), start)), > hba->curr_dev_pwr_mode, hba->uic_link_state); > - if (!ret) > - hba->is_sys_suspended = false; > + > + hba->is_sys_suspended = false; > up(&hba->host_sem); > - return ret; > + return 0; > } > EXPORT_SYMBOL(ufshcd_system_resume); > > @@ -9058,12 +9211,12 @@ 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; > ktime_t start = ktime_get(); > > if (!hba) > @@ -9072,12 +9225,12 @@ int ufshcd_runtime_suspend(struct ufs_hba *hba) > if (!hba->is_powered) > goto out; > else > - ret = ufshcd_suspend(hba, UFS_RUNTIME_PM); > + ufshcd_suspend(hba); > out: > - trace_ufshcd_runtime_suspend(dev_name(hba->dev), ret, > + trace_ufshcd_runtime_suspend(dev_name(hba->dev), 0, > ktime_to_us(ktime_sub(ktime_get(), start)), > hba->curr_dev_pwr_mode, hba->uic_link_state); > - return ret; > + return 0; > } > EXPORT_SYMBOL(ufshcd_runtime_suspend); > > @@ -9085,26 +9238,14 @@ 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; > ktime_t start = ktime_get(); > > if (!hba) > @@ -9113,12 +9254,12 @@ int ufshcd_runtime_resume(struct ufs_hba *hba) > if (!hba->is_powered) > goto out; > else > - ret = ufshcd_resume(hba, UFS_RUNTIME_PM); > + ufshcd_resume(hba); > out: > - trace_ufshcd_runtime_resume(dev_name(hba->dev), ret, > + trace_ufshcd_runtime_resume(dev_name(hba->dev), 0, > ktime_to_us(ktime_sub(ktime_get(), start)), > hba->curr_dev_pwr_mode, hba->uic_link_state); > - return ret; > + return 0; > } > EXPORT_SYMBOL(ufshcd_runtime_resume); > > @@ -9132,14 +9273,13 @@ 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); > @@ -9152,10 +9292,8 @@ int ufshcd_shutdown(struct ufs_hba *hba) > > 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; > @@ -9477,15 +9615,160 @@ 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); > + > + pm_runtime_put_noidle(&hba->sdev_ufs_device->sdev_gendev); > +} > +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. > + */ > + scsi_autopm_get_device(hba->sdev_ufs_device); > + /* Refer ufshcd_resume_complete() */ > + pm_runtime_get_noresume(&hba->sdev_ufs_device->sdev_gendev); > + scsi_autopm_put_device(hba->sdev_ufs_device); > + return 0; > +} > +EXPORT_SYMBOL_GPL(ufshcd_suspend_prepare); > + > +#ifdef CONFIG_PM_SLEEP > +static int ufshcd_wl_poweroff(struct device *dev) > +{ > + ufshcd_wl_shutdown(dev); > + return 0; > +} > +#endif > + > +static int ufshcd_wl_probe(struct device *dev) > +{ > + return is_device_wlun(to_scsi_device(dev)) ? 0 : -ENODEV; > +} > + > +static int ufshcd_wl_remove(struct device *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(); > + > + ret = scsi_register_driver(&ufs_dev_wlun_template.gendrv); > + if (ret) I should have noticed before, but the error path needs ufs_debugfs_exit() > + return ret; > + > + ret = scsi_register_driver(&ufs_rpmb_wlun_template.gendrv); > + if (ret) { > + scsi_unregister_driver(&ufs_dev_wlun_template.gendrv); Error path needs ufs_debugfs_exit() > + return ret; > + } > return 0; > } > > static void __exit ufshcd_core_exit(void) > { > ufs_debugfs_exit(); > + scsi_unregister_driver(&ufs_dev_wlun_template.gendrv); > + scsi_unregister_driver(&ufs_rpmb_wlun_template.gendrv); > } > > module_init(ufshcd_core_init); > diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h > index ee61f82..e246ec3 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, > @@ -804,6 +806,7 @@ 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; > @@ -841,6 +844,8 @@ 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 */ > @@ -1100,6 +1105,8 @@ int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba, > enum query_opcode desc_op); > > int ufshcd_wb_ctrl(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) > 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, >
diff --git a/drivers/scsi/ufs/cdns-pltfrm.c b/drivers/scsi/ufs/cdns-pltfrm.c index 149391f..3e70c23 100644 --- a/drivers/scsi/ufs/cdns-pltfrm.c +++ b/drivers/scsi/ufs/cdns-pltfrm.c @@ -319,6 +319,8 @@ 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-exynos.c b/drivers/scsi/ufs/ufs-exynos.c index 267943a1..45c0b02 100644 --- a/drivers/scsi/ufs/ufs-exynos.c +++ b/drivers/scsi/ufs/ufs-exynos.c @@ -1268,6 +1268,8 @@ 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 c55202b..df1eabb 100644 --- a/drivers/scsi/ufs/ufs-mediatek.c +++ b/drivers/scsi/ufs/ufs-mediatek.c @@ -1097,6 +1097,8 @@ 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 f97d7b0..9aa098a 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -1546,6 +1546,8 @@ 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..cbb5a90 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); + scsi_autopm_get_device(hba->sdev_ufs_device); 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); + scsi_autopm_put_device(hba->sdev_ufs_device); goto out; } @@ -138,7 +138,7 @@ static int ufs_bsg_request(struct bsg_job *job) break; } - pm_runtime_put_sync(hba->dev); + scsi_autopm_put_device(hba->sdev_ufs_device); if (!desc_buff) goto out; diff --git a/drivers/scsi/ufs/ufshcd-pci.c b/drivers/scsi/ufs/ufshcd-pci.c index fadd566..50f84bf 100644 --- a/drivers/scsi/ufs/ufshcd-pci.c +++ b/drivers/scsi/ufs/ufshcd-pci.c @@ -247,29 +247,6 @@ 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 @@ -366,12 +343,9 @@ 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, + .prepare = ufshcd_suspend_prepare, + .complete = ufshcd_resume_complete, + SET_SYSTEM_SLEEP_PM_OPS(ufshcd_pci_suspend, ufshcd_pci_resume) #endif SET_RUNTIME_PM_OPS(ufshcd_pci_runtime_suspend, ufshcd_pci_runtime_resume, diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 45624c7..32139dd 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -16,6 +16,7 @@ #include <linux/bitfield.h> #include <linux/blk-pm.h> #include <linux/blkdev.h> +#include <scsi/scsi_driver.h> #include "ufshcd.h" #include "ufs_quirks.h" #include "unipro.h" @@ -78,6 +79,8 @@ /* 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; \ @@ -1556,7 +1559,7 @@ 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); + scsi_autopm_get_device(hba->sdev_ufs_device); ufshcd_hold(hba, false); hba->clk_scaling.is_enabled = value; @@ -1572,7 +1575,7 @@ static ssize_t ufshcd_clkscale_enable_store(struct device *dev, } ufshcd_release(hba); - pm_runtime_put_sync(hba->dev); + scsi_autopm_put_device(hba->sdev_ufs_device); out: up(&hba->host_sem); return err ? err : count; @@ -2572,6 +2575,17 @@ 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 +4822,41 @@ 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); + 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 +4887,8 @@ 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; } @@ -4985,15 +5036,9 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) * UFS device needs urgent BKOPs. */ if (!hba->pm_op_in_progress && - 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 */ @@ -5589,8 +5634,8 @@ 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); } /** @@ -5607,7 +5652,6 @@ 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) { @@ -5623,14 +5667,6 @@ static void ufshcd_exception_event_handler(struct work_struct *work) 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; } @@ -7207,11 +7243,12 @@ static void ufshcd_set_active_icc_lvl(struct ufs_hba *hba) static inline void ufshcd_blk_pm_runtime_init(struct scsi_device *sdev) { + int dly = is_device_wlun(sdev) ? 0:RPM_AUTOSUSPEND_DELAY_MS; + 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); + pm_runtime_set_autosuspend_delay(&sdev->sdev_gendev, dly); scsi_autopm_put_device(sdev); } @@ -7254,6 +7291,15 @@ 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 <rpm_lvl>). Probing of other luns may fail then. + * Don't allow this suspend until all the luns have been probed. + * See pm_runtime_mark_last_busy in ufshcd_setup_links. + */ + 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 +7463,9 @@ 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); @@ -7892,6 +7941,7 @@ 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) { @@ -7964,6 +8014,7 @@ 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 +8526,8 @@ 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; @@ -8650,23 +8702,7 @@ 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; @@ -8674,7 +8710,13 @@ 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; + /* + * Is invoked when the device wlun is added to sysfs + * But by then hba->sdev_ufs_device may not be initialized. + */ + if (!hba->init_done) + return 0; + 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; @@ -8697,17 +8739,17 @@ 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 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 +8761,7 @@ 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); @@ -8747,7 +8789,7 @@ 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; } } @@ -8760,7 +8802,6 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) if (ret) goto set_dev_active; -disable_clks: /* * Call vendor specific suspend callback. As these callbacks may access * vendor specific host controller register space call them before the @@ -8769,28 +8810,9 @@ 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 @@ -8812,57 +8834,35 @@ 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; - - 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; + enum uic_link_state old_link_state = hba->uic_link_state; - /* Make sure clocks are enabled before accessing controller */ - ret = ufshcd_setup_clocks(hba, true); - if (ret) - goto disable_vreg; + if (!hba->init_done) + return 0; - /* 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 @@ -8871,7 +8871,7 @@ 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)); @@ -8916,31 +8916,147 @@ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) */ 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->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); + 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 = 0; + ktime_t start = ktime_get(); + + if (pm_runtime_suspended(dev)) + 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; +} +#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); + /* Turn on everything while shutting down */ + scsi_autopm_get_device(sdev); + 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 void ufshcd_suspend(struct ufs_hba *hba) +{ + hba->pm_op_in_progress = 1; + + /* + * 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)) { @@ -8948,6 +9064,43 @@ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) 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); + hba->pm_op_in_progress = 0; +} + +/** + * 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; + + hba->pm_op_in_progress = 1; + + 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: @@ -8962,6 +9115,7 @@ 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 */ @@ -9001,7 +9155,7 @@ int ufshcd_system_suspend(struct ufs_hba *hba) goto out; } - ret = ufshcd_suspend(hba, UFS_SYSTEM_PM); + ufshcd_suspend(hba); out: trace_ufshcd_system_suspend(dev_name(hba->dev), ret, ktime_to_us(ktime_sub(ktime_get(), start)), @@ -9023,7 +9177,6 @@ EXPORT_SYMBOL(ufshcd_system_suspend); int ufshcd_system_resume(struct ufs_hba *hba) { - int ret = 0; ktime_t start = ktime_get(); if (!hba) @@ -9041,15 +9194,15 @@ int ufshcd_system_resume(struct ufs_hba *hba) */ goto out; else - ret = ufshcd_resume(hba, UFS_SYSTEM_PM); + ufshcd_resume(hba); out: - trace_ufshcd_system_resume(dev_name(hba->dev), ret, + trace_ufshcd_system_resume(dev_name(hba->dev), 0, ktime_to_us(ktime_sub(ktime_get(), start)), hba->curr_dev_pwr_mode, hba->uic_link_state); - if (!ret) - hba->is_sys_suspended = false; + + hba->is_sys_suspended = false; up(&hba->host_sem); - return ret; + return 0; } EXPORT_SYMBOL(ufshcd_system_resume); @@ -9058,12 +9211,12 @@ 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; ktime_t start = ktime_get(); if (!hba) @@ -9072,12 +9225,12 @@ int ufshcd_runtime_suspend(struct ufs_hba *hba) if (!hba->is_powered) goto out; else - ret = ufshcd_suspend(hba, UFS_RUNTIME_PM); + ufshcd_suspend(hba); out: - trace_ufshcd_runtime_suspend(dev_name(hba->dev), ret, + trace_ufshcd_runtime_suspend(dev_name(hba->dev), 0, ktime_to_us(ktime_sub(ktime_get(), start)), hba->curr_dev_pwr_mode, hba->uic_link_state); - return ret; + return 0; } EXPORT_SYMBOL(ufshcd_runtime_suspend); @@ -9085,26 +9238,14 @@ 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; ktime_t start = ktime_get(); if (!hba) @@ -9113,12 +9254,12 @@ int ufshcd_runtime_resume(struct ufs_hba *hba) if (!hba->is_powered) goto out; else - ret = ufshcd_resume(hba, UFS_RUNTIME_PM); + ufshcd_resume(hba); out: - trace_ufshcd_runtime_resume(dev_name(hba->dev), ret, + trace_ufshcd_runtime_resume(dev_name(hba->dev), 0, ktime_to_us(ktime_sub(ktime_get(), start)), hba->curr_dev_pwr_mode, hba->uic_link_state); - return ret; + return 0; } EXPORT_SYMBOL(ufshcd_runtime_resume); @@ -9132,14 +9273,13 @@ 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); @@ -9152,10 +9292,8 @@ int ufshcd_shutdown(struct ufs_hba *hba) 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; @@ -9477,15 +9615,160 @@ 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); + + pm_runtime_put_noidle(&hba->sdev_ufs_device->sdev_gendev); +} +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. + */ + scsi_autopm_get_device(hba->sdev_ufs_device); + /* Refer ufshcd_resume_complete() */ + pm_runtime_get_noresume(&hba->sdev_ufs_device->sdev_gendev); + scsi_autopm_put_device(hba->sdev_ufs_device); + return 0; +} +EXPORT_SYMBOL_GPL(ufshcd_suspend_prepare); + +#ifdef CONFIG_PM_SLEEP +static int ufshcd_wl_poweroff(struct device *dev) +{ + ufshcd_wl_shutdown(dev); + return 0; +} +#endif + +static int ufshcd_wl_probe(struct device *dev) +{ + return is_device_wlun(to_scsi_device(dev)) ? 0 : -ENODEV; +} + +static int ufshcd_wl_remove(struct device *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(); + + ret = scsi_register_driver(&ufs_dev_wlun_template.gendrv); + if (ret) + return ret; + + ret = scsi_register_driver(&ufs_rpmb_wlun_template.gendrv); + if (ret) { + scsi_unregister_driver(&ufs_dev_wlun_template.gendrv); + return ret; + } return 0; } static void __exit ufshcd_core_exit(void) { ufs_debugfs_exit(); + scsi_unregister_driver(&ufs_dev_wlun_template.gendrv); + scsi_unregister_driver(&ufs_rpmb_wlun_template.gendrv); } module_init(ufshcd_core_init); diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index ee61f82..e246ec3 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, @@ -804,6 +806,7 @@ 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; @@ -841,6 +844,8 @@ 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 */ @@ -1100,6 +1105,8 @@ int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba, enum query_opcode desc_op); int ufshcd_wb_ctrl(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) 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,