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Message-Id: <1620885319-15151-2-git-send-email-cang@codeaurora.org>
Date: Wed, 12 May 2021 22:55:13 -0700
From: Can Guo <cang@...eaurora.org>
To: asutoshd@...eaurora.org, nguyenb@...eaurora.org,
hongwus@...eaurora.org, ziqichen@...eaurora.org,
linux-scsi@...r.kernel.org, kernel-team@...roid.com,
cang@...eaurora.org
Cc: Alim Akhtar <alim.akhtar@...sung.com>,
Avri Altman <avri.altman@....com>,
"James E.J. Bottomley" <jejb@...ux.ibm.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Stanley Chu <stanley.chu@...iatek.com>,
Bean Huo <beanhuo@...ron.com>,
Jaegeuk Kim <jaegeuk@...nel.org>,
Adrian Hunter <adrian.hunter@...el.com>,
Kiwoong Kim <kwmad.kim@...sung.com>,
Satya Tangirala <satyat@...gle.com>,
linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v1 1/6] scsi: ufs: Differentiate status between hba pm ops and wl pm ops
Put pm_op_in_progress and is_sys_suspend flags back to ufshcd hba pm ops,
add two new flags, namely wl_pm_op_in_progress and is_wl_sys_suspended, to
track the UFS device W-LU pm ops. This helps us differentiate the status of
hba and wl pm ops when we need to do troubleshooting.
Signed-off-by: Can Guo <cang@...eaurora.org>
---
drivers/scsi/ufs/ufshcd.c | 42 ++++++++++++++++++++++++++++--------------
drivers/scsi/ufs/ufshcd.h | 4 +++-
2 files changed, 31 insertions(+), 15 deletions(-)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index ab707a2..c69602b 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -543,7 +543,9 @@ static void ufshcd_print_host_state(struct ufs_hba *hba)
hba->saved_err, hba->saved_uic_err);
dev_err(hba->dev, "Device power mode=%d, UIC link state=%d\n",
hba->curr_dev_pwr_mode, hba->uic_link_state);
- dev_err(hba->dev, "PM in progress=%d, sys. suspended=%d\n",
+ dev_err(hba->dev, "wl_pm_op_in_progress=%d, is_wl_sys_suspended=%d\n",
+ hba->wl_pm_op_in_progress, hba->is_wl_sys_suspended);
+ dev_err(hba->dev, "pm_op_in_progress=%d, is_sys_suspended=%d\n",
hba->pm_op_in_progress, hba->is_sys_suspended);
dev_err(hba->dev, "Auto BKOPS=%d, Host self-block=%d\n",
hba->auto_bkops_enabled, hba->host->host_self_blocked);
@@ -1991,7 +1993,7 @@ static void ufshcd_clk_scaling_start_busy(struct ufs_hba *hba)
if (!hba->clk_scaling.active_reqs++)
queue_resume_work = true;
- if (!hba->clk_scaling.is_enabled || hba->pm_op_in_progress)
+ if (!hba->clk_scaling.is_enabled || hba->wl_pm_op_in_progress)
return;
if (queue_resume_work)
@@ -2640,7 +2642,7 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
lrbp = &hba->lrb[tag];
if (unlikely(lrbp->in_use)) {
- if (hba->pm_op_in_progress)
+ if (hba->wl_pm_op_in_progress)
set_host_byte(cmd, DID_BAD_TARGET);
else
err = SCSI_MLQUEUE_HOST_BUSY;
@@ -2687,7 +2689,7 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
* err handler blocked for too long. So, just fail the scsi cmd
* sent from PM ops, err handler can recover PM error anyways.
*/
- if (hba->pm_op_in_progress) {
+ if (hba->wl_pm_op_in_progress) {
hba->force_reset = true;
set_host_byte(cmd, DID_BAD_TARGET);
goto out_compl_cmd;
@@ -5036,7 +5038,7 @@ ufshcd_transfer_rsp_status(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
* solution could be to abort the system suspend if
* UFS device needs urgent BKOPs.
*/
- if (!hba->pm_op_in_progress &&
+ if (!hba->wl_pm_op_in_progress &&
!ufshcd_eh_in_progress(hba) &&
ufshcd_is_exception_event(lrbp->ucd_rsp_ptr))
/* Flushed in suspend */
@@ -5799,7 +5801,7 @@ static void ufshcd_err_handling_prepare(struct ufs_hba *hba)
{
ufshcd_rpm_get_sync(hba);
if (pm_runtime_status_suspended(&hba->sdev_ufs_device->sdev_gendev) ||
- hba->is_sys_suspended) {
+ hba->is_wl_sys_suspended) {
enum ufs_pm_op pm_op;
/*
@@ -5816,7 +5818,7 @@ static void ufshcd_err_handling_prepare(struct ufs_hba *hba)
if (!ufshcd_is_clkgating_allowed(hba))
ufshcd_setup_clocks(hba, true);
ufshcd_release(hba);
- pm_op = hba->is_sys_suspended ? UFS_SYSTEM_PM : UFS_RUNTIME_PM;
+ pm_op = hba->is_wl_sys_suspended ? UFS_SYSTEM_PM : UFS_RUNTIME_PM;
ufshcd_vops_resume(hba, pm_op);
} else {
ufshcd_hold(hba, false);
@@ -5859,7 +5861,7 @@ static void ufshcd_recover_pm_error(struct ufs_hba *hba)
struct request_queue *q;
int ret;
- hba->is_sys_suspended = false;
+ hba->is_wl_sys_suspended = false;
/*
* Set RPM status of wlun device to RPM_ACTIVE,
* this also clears its runtime error.
@@ -8709,7 +8711,7 @@ static int __ufshcd_wl_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 = true;
+ hba->wl_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;
@@ -8844,7 +8846,7 @@ static int __ufshcd_wl_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op)
hba->clk_gating.is_suspended = false;
ufshcd_release(hba);
}
- hba->pm_op_in_progress = false;
+ hba->wl_pm_op_in_progress = false;
return ret;
}
@@ -8853,7 +8855,7 @@ 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->uic_link_state;
- hba->pm_op_in_progress = true;
+ hba->wl_pm_op_in_progress = true;
/*
* Call vendor specific resume callback. As these callbacks may access
@@ -8931,7 +8933,7 @@ static int __ufshcd_wl_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
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;
+ hba->wl_pm_op_in_progress = false;
return ret;
}
@@ -8997,7 +8999,7 @@ static int ufshcd_wl_suspend(struct device *dev)
out:
if (!ret)
- hba->is_sys_suspended = true;
+ hba->is_wl_sys_suspended = true;
trace_ufshcd_wl_suspend(dev_name(dev), ret,
ktime_to_us(ktime_sub(ktime_get(), start)),
hba->curr_dev_pwr_mode, hba->uic_link_state);
@@ -9025,7 +9027,7 @@ static int ufshcd_wl_resume(struct device *dev)
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_wl_sys_suspended = false;
up(&hba->host_sem);
return ret;
}
@@ -9067,6 +9069,8 @@ static int ufshcd_suspend(struct ufs_hba *hba)
if (!hba->is_powered)
return 0;
+
+ hba->pm_op_in_progress = true;
/*
* Disable the host irq as host controller as there won't be any
* host controller transaction expected till resume.
@@ -9086,6 +9090,7 @@ static int ufshcd_suspend(struct ufs_hba *hba)
ufshcd_vreg_set_lpm(hba);
/* Put the host controller in low power mode if possible */
ufshcd_hba_vreg_set_lpm(hba);
+ hba->pm_op_in_progress = false;
return ret;
}
@@ -9106,6 +9111,7 @@ static int ufshcd_resume(struct ufs_hba *hba)
if (!hba->is_powered)
return 0;
+ hba->pm_op_in_progress = true;
ufshcd_hba_vreg_set_hpm(hba);
ret = ufshcd_vreg_set_hpm(hba);
if (ret)
@@ -9125,6 +9131,7 @@ static int ufshcd_resume(struct ufs_hba *hba)
out:
if (ret)
ufshcd_update_evt_hist(hba, UFS_EVT_RESUME_ERR, (u32)ret);
+ hba->pm_op_in_progress = false;
return ret;
}
@@ -9150,6 +9157,10 @@ int ufshcd_system_suspend(struct ufs_hba *hba)
trace_ufshcd_system_suspend(dev_name(hba->dev), ret,
ktime_to_us(ktime_sub(ktime_get(), start)),
hba->curr_dev_pwr_mode, hba->uic_link_state);
+
+ if (!ret)
+ hba->is_sys_suspended = true;
+
return ret;
}
EXPORT_SYMBOL(ufshcd_system_suspend);
@@ -9176,6 +9187,9 @@ int ufshcd_system_resume(struct ufs_hba *hba)
ktime_to_us(ktime_sub(ktime_get(), start)),
hba->curr_dev_pwr_mode, hba->uic_link_state);
+ if (!ret)
+ hba->is_sys_suspended = false;
+
return ret;
}
EXPORT_SYMBOL(ufshcd_system_resume);
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index b8b4fe2..201dc49 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -739,7 +739,8 @@ struct ufs_hba {
enum ufs_pm_level spm_lvl;
struct device_attribute rpm_lvl_attr;
struct device_attribute spm_lvl_attr;
- int pm_op_in_progress;
+ bool pm_op_in_progress;
+ bool wl_pm_op_in_progress;
/* Auto-Hibernate Idle Timer register value */
u32 ahit;
@@ -826,6 +827,7 @@ struct ufs_hba {
struct devfreq *devfreq;
struct ufs_clk_scaling clk_scaling;
bool is_sys_suspended;
+ bool is_wl_sys_suspended;
enum bkops_status urgent_bkops_lvl;
bool is_urgent_bkops_lvl_checked;
--
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