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 <[email protected]>
---
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 25fe18a..47b2a9a 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -549,7 +549,9 @@ 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);
@@ -1999,7 +2001,7 @@ 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) {
spin_unlock_irqrestore(hba->host->host_lock, flags);
return;
}
@@ -2734,7 +2736,7 @@ 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);
cmd->scsi_done(cmd);
@@ -2767,7 +2769,7 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
(hba->clk_gating.state != CLKS_ON));
if (unlikely(test_bit(tag, &hba->outstanding_reqs))) {
- 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;
@@ -5116,7 +5118,7 @@ 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 */
@@ -5916,7 +5918,7 @@ 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;
/*
@@ -5933,7 +5935,7 @@ 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);
@@ -5976,7 +5978,7 @@ 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.
@@ -8784,7 +8786,7 @@ 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 (pm_op != UFS_SHUTDOWN_PM) {
pm_lvl = pm_op == UFS_RUNTIME_PM ?
hba->rpm_lvl : hba->spm_lvl;
@@ -8919,7 +8921,7 @@ 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;
}
@@ -8928,7 +8930,7 @@ 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
@@ -9006,7 +9008,7 @@ 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;
}
@@ -9072,7 +9074,7 @@ 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);
@@ -9100,7 +9102,7 @@ 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;
}
@@ -9141,6 +9143,8 @@ 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.
@@ -9160,6 +9164,7 @@ 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;
}
@@ -9179,6 +9184,7 @@ 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)
@@ -9198,6 +9204,7 @@ 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;
}
@@ -9222,6 +9229,10 @@ 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);
@@ -9248,6 +9259,9 @@ 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 c98d540..eaebb4e 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -752,7 +752,8 @@ 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;
@@ -839,6 +840,7 @@ 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;
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
On 10/06/21 7:43 am, Can Guo wrote:
> 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.
Really you have 2 changes here:
1. Renaming to pm_op_in_progress / is_sys_suspend to wl_pm_op_in_progress / is_wl_sys_suspended
2. Introducing flags for the status of hba
So it should really be 2 patches.
That would show up things like:
- did you intend not to change hba->is_sys_suspended in ufs_qcom_resume() ?
>
> Signed-off-by: Can Guo <[email protected]>
> ---
> 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 25fe18a..47b2a9a 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -549,7 +549,9 @@ 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);
> @@ -1999,7 +2001,7 @@ 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) {
> spin_unlock_irqrestore(hba->host->host_lock, flags);
> return;
> }
> @@ -2734,7 +2736,7 @@ 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);
> cmd->scsi_done(cmd);
> @@ -2767,7 +2769,7 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
> (hba->clk_gating.state != CLKS_ON));
>
> if (unlikely(test_bit(tag, &hba->outstanding_reqs))) {
> - 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;
> @@ -5116,7 +5118,7 @@ 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 */
> @@ -5916,7 +5918,7 @@ 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;
>
> /*
> @@ -5933,7 +5935,7 @@ 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);
> @@ -5976,7 +5978,7 @@ 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.
> @@ -8784,7 +8786,7 @@ 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 (pm_op != UFS_SHUTDOWN_PM) {
> pm_lvl = pm_op == UFS_RUNTIME_PM ?
> hba->rpm_lvl : hba->spm_lvl;
> @@ -8919,7 +8921,7 @@ 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;
> }
>
> @@ -8928,7 +8930,7 @@ 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
> @@ -9006,7 +9008,7 @@ 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;
> }
>
> @@ -9072,7 +9074,7 @@ 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);
> @@ -9100,7 +9102,7 @@ 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;
> }
> @@ -9141,6 +9143,8 @@ 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.
> @@ -9160,6 +9164,7 @@ 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;
> }
>
> @@ -9179,6 +9184,7 @@ 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)
> @@ -9198,6 +9204,7 @@ 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;
> }
>
> @@ -9222,6 +9229,10 @@ 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);
> @@ -9248,6 +9259,9 @@ 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 c98d540..eaebb4e 100644
> --- a/drivers/scsi/ufs/ufshcd.h
> +++ b/drivers/scsi/ufs/ufshcd.h
> @@ -752,7 +752,8 @@ 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;
> @@ -839,6 +840,7 @@ 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;
>
Hi Adrian,
On 2021-06-10 19:15, Adrian Hunter wrote:
> On 10/06/21 7:43 am, Can Guo wrote:
>> 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.
>
> Really you have 2 changes here:
> 1. Renaming to pm_op_in_progress / is_sys_suspend to
> wl_pm_op_in_progress / is_wl_sys_suspended
> 2. Introducing flags for the status of hba
>
> So it should really be 2 patches.
Sure I will make it 2 in next version.
>
> That would show up things like:
> - did you intend not to change hba->is_sys_suspended in
> ufs_qcom_resume() ?
I missed it - shall change it in next version.
Thanks,
Can Guo.
>
>>
>> Signed-off-by: Can Guo <[email protected]>
>> ---
>> 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 25fe18a..47b2a9a 100644
>> --- a/drivers/scsi/ufs/ufshcd.c
>> +++ b/drivers/scsi/ufs/ufshcd.c
>> @@ -549,7 +549,9 @@ 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);
>> @@ -1999,7 +2001,7 @@ 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) {
>> spin_unlock_irqrestore(hba->host->host_lock, flags);
>> return;
>> }
>> @@ -2734,7 +2736,7 @@ 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);
>> cmd->scsi_done(cmd);
>> @@ -2767,7 +2769,7 @@ static int ufshcd_queuecommand(struct Scsi_Host
>> *host, struct scsi_cmnd *cmd)
>> (hba->clk_gating.state != CLKS_ON));
>>
>> if (unlikely(test_bit(tag, &hba->outstanding_reqs))) {
>> - 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;
>> @@ -5116,7 +5118,7 @@ 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 */
>> @@ -5916,7 +5918,7 @@ 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;
>>
>> /*
>> @@ -5933,7 +5935,7 @@ 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);
>> @@ -5976,7 +5978,7 @@ 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.
>> @@ -8784,7 +8786,7 @@ 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 (pm_op != UFS_SHUTDOWN_PM) {
>> pm_lvl = pm_op == UFS_RUNTIME_PM ?
>> hba->rpm_lvl : hba->spm_lvl;
>> @@ -8919,7 +8921,7 @@ 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;
>> }
>>
>> @@ -8928,7 +8930,7 @@ 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
>> @@ -9006,7 +9008,7 @@ 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;
>> }
>>
>> @@ -9072,7 +9074,7 @@ 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);
>> @@ -9100,7 +9102,7 @@ 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;
>> }
>> @@ -9141,6 +9143,8 @@ 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.
>> @@ -9160,6 +9164,7 @@ 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;
>> }
>>
>> @@ -9179,6 +9184,7 @@ 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)
>> @@ -9198,6 +9204,7 @@ 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;
>> }
>>
>> @@ -9222,6 +9229,10 @@ 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);
>> @@ -9248,6 +9259,9 @@ 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 c98d540..eaebb4e 100644
>> --- a/drivers/scsi/ufs/ufshcd.h
>> +++ b/drivers/scsi/ufs/ufshcd.h
>> @@ -752,7 +752,8 @@ 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;
>> @@ -839,6 +840,7 @@ 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;
>>
On 6/9/21 9:43 PM, Can Guo wrote:
> 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.
Since "WL" is an uncommon abbreviation, please add a comment above the
definition of struct ufs_hba that explains the meaning of the new member
variables.
Thanks,
Bart.
On 2021-06-12 04:40, Bart Van Assche wrote:
> On 6/9/21 9:43 PM, Can Guo wrote:
>> 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.
>
> Since "WL" is an uncommon abbreviation, please add a comment above the
> definition of struct ufs_hba that explains the meaning of the new
> member
> variables.
Sure, will add in next version.
Thanks,
Can Guo.
>
> Thanks,
>
> Bart.
On 6/9/21 9:43 PM, Can Guo wrote:
> @@ -8784,7 +8786,7 @@ 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 (pm_op != UFS_SHUTDOWN_PM) {
> pm_lvl = pm_op == UFS_RUNTIME_PM ?
> hba->rpm_lvl : hba->spm_lvl;
> @@ -8919,7 +8921,7 @@ 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;
> }
Are the __ufshcd_wl_suspend() calls serialized in any way? If not, will
the value of wl_pm_op_in_progress be incorrect if multiple kernel
threads run __ufshcd_wl_suspend() concurrently and one of the
__ufshcd_wl_suspend() instances returns earlier than the other?
Thanks,
Bart.
Hi Bart,
On 2021-06-17 01:50, Bart Van Assche wrote:
> On 6/9/21 9:43 PM, Can Guo wrote:
>> @@ -8784,7 +8786,7 @@ 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 (pm_op != UFS_SHUTDOWN_PM) {
>> pm_lvl = pm_op == UFS_RUNTIME_PM ?
>> hba->rpm_lvl : hba->spm_lvl;
>> @@ -8919,7 +8921,7 @@ 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;
>> }
>
> Are the __ufshcd_wl_suspend() calls serialized in any way? If not, will
> the value of wl_pm_op_in_progress be incorrect if multiple kernel
> threads run __ufshcd_wl_suspend() concurrently and one of the
> __ufshcd_wl_suspend() instances returns earlier than the other?
>
Sorry for getting back late on this... I was stuck by some urgent
issues.
Yes, __ufshcd_wl_suspend() calls are serilized, because it is called by
either runtime suspend or system suspend, and runtime suspend and system
suspend are serialized - Rafael J. Wysocki has put a lot of efforts on
it,
see also 1e2ef05bb8cf8 ("PM: Limit race conditions between runtime PM
and
system sleep (v2)")).
> Thanks,
>
> Bart.