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 <[email protected]>
Signed-off-by: Can Guo <[email protected]>
Signed-off-by: Asutosh Das <[email protected]>
---
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 | 642 ++++++++++++++++++++++++++-----------
drivers/scsi/ufs/ufshcd.h | 6 +
include/trace/events/ufs.h | 20 ++
13 files changed, 509 insertions(+), 231 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..1e8d92b 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);
+ scsi_autopm_get_device(hba->sdev_ufs_device);
return 0;
}
static void ufs_debugfs_put_user_access(struct ufs_hba *hba)
__releases(&hba->host_sem)
{
- pm_runtime_put_sync(hba->dev);
+ scsi_autopm_put_device(hba->sdev_ufs_device);
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..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 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..a0e6478 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"
@@ -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);
+ scsi_autopm_get_device(hba->sdev_ufs_device);
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);
+ scsi_autopm_put_device(hba->sdev_ufs_device);
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)) {
+ scsi_autopm_get_device(hba->sdev_ufs_device);
ufshcd_hold(hba, false);
ufshcd_auto_hibern8_enable(hba);
ufshcd_release(hba);
- pm_runtime_put(hba->dev);
+ scsi_autopm_put_device(hba->sdev_ufs_device);
}
}
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) {
+ pm_runtime_put(&hba->sdev_ufs_device->sdev_gendev);
+ 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);
+ scsi_autopm_get_device(hba->sdev_ufs_device);
+ scsi_autopm_put_device(hba->sdev_ufs_device);
}
/**
@@ -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) {
+ scsi_autopm_get_device(hba->sdev_ufs_device);
+ 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);
+ pm_runtime_put(&hba->sdev_ufs_device->sdev_gendev);
}
static inline bool ufshcd_err_handling_should_stop(struct ufs_hba *hba)
@@ -5815,14 +5857,14 @@ 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);
/*
- * 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 +7288,6 @@ 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 +7451,9 @@ 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 +7931,7 @@ 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 +8517,8 @@ 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 +8693,7 @@ 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 +8701,7 @@ 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 +8724,17 @@ 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)) {
@@ -8716,7 +8746,7 @@ 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 +8774,7 @@ 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 +8787,6 @@ 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
@@ -8766,28 +8795,9 @@ 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 +8819,32 @@ 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;
-
- 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;
-
- /* 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 +8853,7 @@ 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 +8901,152 @@ 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);
+ 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);
+
+ down(&hba->host_sem);
+ hba->shutting_down = true;
+ up(&hba->host_sem);
+
+ /* 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 +9054,43 @@ 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 +9105,7 @@ 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
*/
@@ -8982,21 +9126,7 @@ int ufshcd_system_suspend(struct ufs_hba *hba)
!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;
- }
-
- 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)),
@@ -9018,25 +9148,20 @@ EXPORT_SYMBOL(ufshcd_system_suspend);
int ufshcd_system_resume(struct ufs_hba *hba)
{
- int ret = 0;
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 (!hba->is_powered)
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);
@@ -9045,23 +9170,23 @@ 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->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);
@@ -9069,37 +9194,25 @@ 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->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);
@@ -9113,18 +9226,13 @@ 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);
-
if (!hba->is_powered)
goto out;
@@ -9133,10 +9241,8 @@ 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;
@@ -9150,6 +9256,8 @@ EXPORT_SYMBOL(ufshcd_shutdown);
*/
void ufshcd_remove(struct ufs_hba *hba)
{
+ if (hba->sdev_ufs_device)
+ scsi_autopm_get_device(hba->sdev_ufs_device);
ufs_bsg_remove(hba);
ufs_sysfs_remove_nodes(hba->dev);
blk_cleanup_queue(hba->tmf_queue);
@@ -9453,15 +9561,175 @@ 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)
+{
+ 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();
+
+ ret = scsi_register_driver(&ufs_dev_wlun_template.gendrv);
+ if (ret) {
+ ufs_debugfs_exit();
+ return ret;
+ }
+ ret = scsi_register_driver(&ufs_rpmb_wlun_template.gendrv);
+ if (ret) {
+ ufs_debugfs_exit();
+ 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_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..40436e3 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)
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,
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
Hi Asutosh Das,
>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 <[email protected]>
>Signed-off-by: Can Guo <[email protected]>
>Signed-off-by: Asutosh Das <[email protected]>
>---
> 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 | 642 ++++++++++++++++++++++++++-----------
> drivers/scsi/ufs/ufshcd.h | 6 +
> include/trace/events/ufs.h | 20 ++
> 13 files changed, 509 insertions(+), 231 deletions(-)
In this patch, you changed pm_runtime_{get, put}_sync to scsi_autopm_{get, put}_device.
But, scsi_autopm_get_device() calls pm_runtime_put_sync() in case of error
of pm_runtime_get_sync(). So, pm_runtime_put_sync() can be called twice if
scsi_autopm_get_device has error.
Thanks,
Daejun
On 9/04/21 5:27 am, Daejun Park wrote:
> Hi Asutosh Das,
>
>> 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 <[email protected]>
>> Signed-off-by: Can Guo <[email protected]>
>> Signed-off-by: Asutosh Das <[email protected]>
>> ---
>> 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 | 642 ++++++++++++++++++++++++++-----------
>> drivers/scsi/ufs/ufshcd.h | 6 +
>> include/trace/events/ufs.h | 20 ++
>> 13 files changed, 509 insertions(+), 231 deletions(-)
>
> In this patch, you changed pm_runtime_{get, put}_sync to scsi_autopm_{get, put}_device.
> But, scsi_autopm_get_device() calls pm_runtime_put_sync() in case of error
> of pm_runtime_get_sync(). So, pm_runtime_put_sync() can be called twice if
> scsi_autopm_get_device has error.
Also it might be tidy to make wrappers e.g.
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(struct ufs_hba *hba)
{
return pm_runtime_put(&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);
}
And also consider matching: e.g.
pm_runtime_put(hba->dev) to ufshcd_rpm_put(hba)
pm_runtime_put_sync(hba->dev) to ufshcd_rpm_put_sync(hba)
On 4/9/2021 3:07 AM, Adrian Hunter wrote:
> On 9/04/21 5:27 am, Daejun Park wrote:
>> Hi Asutosh Das,
>>
>>> 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 <[email protected]>
>>> Signed-off-by: Can Guo <[email protected]>
>>> Signed-off-by: Asutosh Das <[email protected]>
>>> ---
>>> 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 | 642 ++++++++++++++++++++++++++-----------
>>> drivers/scsi/ufs/ufshcd.h | 6 +
>>> include/trace/events/ufs.h | 20 ++
>>> 13 files changed, 509 insertions(+), 231 deletions(-)
>>
>> In this patch, you changed pm_runtime_{get, put}_sync to scsi_autopm_{get, put}_device.
>> But, scsi_autopm_get_device() calls pm_runtime_put_sync() in case of error
>> of pm_runtime_get_sync(). So, pm_runtime_put_sync() can be called twice if
>> scsi_autopm_get_device has error.
>
> Also it might be tidy to make wrappers e.g.
>
> 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(struct ufs_hba *hba)
> {
> return pm_runtime_put(&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);
> }
>
> And also consider matching: e.g.
>
> pm_runtime_put(hba->dev) to ufshcd_rpm_put(hba)
> pm_runtime_put_sync(hba->dev) to ufshcd_rpm_put_sync(hba)
>
>
>
Ok, I'll push the changes shortly.
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
Linux Foundation Collaborative Project
On 9/04/21 8:15 pm, Asutosh Das (asd) wrote:
> On 4/9/2021 3:07 AM, Adrian Hunter wrote:
>> On 9/04/21 5:27 am, Daejun Park wrote:
>>> Hi Asutosh Das,
>>>
>>>> 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 <[email protected]>
>>>> Signed-off-by: Can Guo <[email protected]>
>>>> Signed-off-by: Asutosh Das <[email protected]>
>>>> ---
>>>> 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 | 642 ++++++++++++++++++++++++++-----------
>>>> drivers/scsi/ufs/ufshcd.h | 6 +
>>>> include/trace/events/ufs.h | 20 ++
>>>> 13 files changed, 509 insertions(+), 231 deletions(-)
>>>
>>> In this patch, you changed pm_runtime_{get, put}_sync to scsi_autopm_{get, put}_device.
>>> But, scsi_autopm_get_device() calls pm_runtime_put_sync() in case of error
>>> of pm_runtime_get_sync(). So, pm_runtime_put_sync() can be called twice if
>>> scsi_autopm_get_device has error.
>>
>> Also it might be tidy to make wrappers e.g.
>>
>> 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(struct ufs_hba *hba)
>> {
>> return pm_runtime_put(&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);
>> }
>>
>> And also consider matching: e.g.
>>
>> pm_runtime_put(hba->dev) to ufshcd_rpm_put(hba)
>> pm_runtime_put_sync(hba->dev) to ufshcd_rpm_put_sync(hba)
>>
>>
>>
>
> Ok, I'll push the changes shortly.
>
I think I will have some more comments, so you could wait if you want.
On 8/04/21 5:49 pm, 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 (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 <[email protected]>
> Signed-off-by: Can Guo <[email protected]>
> Signed-off-by: Asutosh Das <[email protected]>
> ---
<SNIP>
> @@ -5815,14 +5857,14 @@ 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);
It may be that it was hba->dev with a runtime error. So,
also need here:
if (ret)
ret = pm_runtime_set_active(hba->dev);
> @@ -8671,7 +8701,7 @@ 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 +8724,17 @@ 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;
Previously "goto disable_clks" would go to the vendor callback
ufshcd_vops_suspend(), but now it is skipped.
> }
>
> 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;
> }
<SNIP>
> +/**
> + * 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;
Seems like pm_op_in_progress wouldn't be needed in this function,
nor ufshcd_resume().
You could probably simplify the callers slighly by
putting the "if (!hbs->is_powered) return" check here and in
ufshcd_resume().
> +
> + /*
> + * 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 +9054,43 @@ 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 +9105,7 @@ 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
> */
> @@ -8982,21 +9126,7 @@ 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;
The logic above can be removed.
>
> - 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;
> - }
System suspend/resume and runtime suspend/resume are identical
for hba->dev, so the logic becomes:
if (pm_runtime_suspended(hba->dev))
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)),
> @@ -9018,25 +9148,20 @@ EXPORT_SYMBOL(ufshcd_system_suspend);
>
> int ufshcd_system_resume(struct ufs_hba *hba)
> {
> - int ret = 0;
> 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 (!hba->is_powered)
System suspend/resume and runtime suspend/resume are identical
for hba->dev, so the original logic is fine here.
> 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);
It seems likely that hba->host_sem down / up should be in
ufshcd_wl_suspend() / ufshcd_wl_resume() respectively, instead
of here.
Ditto hba->is_sys_suspended
> - return ret;
> + return 0;
> }
> EXPORT_SYMBOL(ufshcd_system_resume);
>
> @@ -9045,23 +9170,23 @@ 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->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);
>
> @@ -9069,37 +9194,25 @@ 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->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);
>
> @@ -9113,18 +9226,13 @@ 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);
> -
> if (!hba->is_powered)
> goto out;
>
> @@ -9133,10 +9241,8 @@ 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;
> @@ -9150,6 +9256,8 @@ EXPORT_SYMBOL(ufshcd_shutdown);
> */
> void ufshcd_remove(struct ufs_hba *hba)
> {
> + if (hba->sdev_ufs_device)
> + scsi_autopm_get_device(hba->sdev_ufs_device);
> ufs_bsg_remove(hba);
> ufs_sysfs_remove_nodes(hba->dev);
> blk_cleanup_queue(hba->tmf_queue);
> @@ -9453,15 +9561,175 @@ 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);
pm_runtime_put() instead of pm_runtime_put_noidle() would be
more correct here.
> +}
> +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);
This could simply be:
pm_runtime_get_sync(&hba->sdev_ufs_device->sdev_gendev);
or new wrapper.
> + 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();
> +
> + ret = scsi_register_driver(&ufs_dev_wlun_template.gendrv);
> + if (ret) {
> + ufs_debugfs_exit();
> + return ret;
> + }
> + ret = scsi_register_driver(&ufs_rpmb_wlun_template.gendrv);
> + if (ret) {
> + ufs_debugfs_exit();
> + scsi_unregister_driver(&ufs_dev_wlun_template.gendrv);
> + return ret;
> + }
> return 0;
A separated error path is preferred i.e.
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 0;
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..40436e3 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)
> 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,
>