Messages in this thread | | | Date | Fri, 11 Jun 2021 08:53:46 +0800 | From | Can Guo <> | Subject | Re: [PATCH v3 1/9] scsi: ufs: Differentiate status between hba pm ops and wl pm ops |
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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 <cang@codeaurora.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 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; >>
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