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Message-ID: <37a48463f90d2fef55aab315acadb543@codeaurora.org>
Date: Thu, 13 May 2021 13:58:48 +0800
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
Subject: Re: [PATCH v1 1/6] scsi: ufs: Differentiate status of hba and wl pm
ops
Please ignore this one - it is duplicated.
On 2021-05-13 13:55, 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.
>
> 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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