| Message ID | 1604384682-15837-4-git-send-email-cang@codeaurora.org |
|---|---|
| State | New |
| Headers | show |
| Series | scsi: ufs: Try to save power mode change and UIC cmd completion timeout | expand |
Sorry, please ignore this specific change, which is wrongly sent out. On 2020-11-03 14:24, Can Guo wrote: > Use the uic_cmd->cmd_active as a flag to track the lifecycle of an UIC > cmd. > The flag is set before send the UIC cmd and cleared after the > completion is > raised in IRQ handler. For a power mode change operation, including > hibern8 > enter/exit, the flag is cleared only after hba->uic_async_done > completion > is raised. When completion timeout happens, if the flag is cleared, > instead > of returning timeout error, simply ignore it. > > Change-Id: Ie3cd6ae6221a44619925fb2cf78136a5617fdd5d > Signed-off-by: Can Guo <cang@codeaurora.org> > --- > drivers/scsi/ufs/ufshcd.c | 26 ++++++++++++++++++++++++-- > 1 file changed, 24 insertions(+), 2 deletions(-) > > diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c > index 252e022..8b291c3 100644 > --- a/drivers/scsi/ufs/ufshcd.c > +++ b/drivers/scsi/ufs/ufshcd.c > @@ -2131,10 +2131,20 @@ ufshcd_wait_for_uic_cmd(struct ufs_hba *hba, > struct uic_command *uic_cmd) > unsigned long flags; > > if (wait_for_completion_timeout(&uic_cmd->done, > - msecs_to_jiffies(UIC_CMD_TIMEOUT))) > + msecs_to_jiffies(UIC_CMD_TIMEOUT))) { > ret = uic_cmd->argument2 & MASK_UIC_COMMAND_RESULT; > - else > + } else { > ret = -ETIMEDOUT; > + dev_err(hba->dev, > + "uic cmd 0x%x with arg3 0x%x completion timeout\n", > + uic_cmd->command, uic_cmd->argument3); > + > + if (!uic_cmd->cmd_active) { > + dev_err(hba->dev, "%s: UIC cmd has been completed, return the > result\n", > + __func__); > + ret = uic_cmd->argument2 & MASK_UIC_COMMAND_RESULT; > + } > + } > > spin_lock_irqsave(hba->host->host_lock, flags); > hba->active_uic_cmd = NULL; > @@ -2166,6 +2176,7 @@ __ufshcd_send_uic_cmd(struct ufs_hba *hba, > struct uic_command *uic_cmd, > if (completion) > init_completion(&uic_cmd->done); > > + uic_cmd->cmd_active = 1; > ufshcd_dispatch_uic_cmd(hba, uic_cmd); > > return 0; > @@ -3944,10 +3955,18 @@ static int ufshcd_uic_pwr_ctrl(struct ufs_hba > *hba, struct uic_command *cmd) > dev_err(hba->dev, > "pwr ctrl cmd 0x%x with mode 0x%x completion timeout\n", > cmd->command, cmd->argument3); > + > + if (!cmd->cmd_active) { > + dev_err(hba->dev, "%s: Power Mode Change operation has been > completed, go check UPMCRS\n", > + __func__); > + goto check_upmcrs; > + } > + > ret = -ETIMEDOUT; > goto out; > } > > +check_upmcrs: > status = ufshcd_get_upmcrs(hba); > if (status != PWR_LOCAL) { > dev_err(hba->dev, > @@ -5060,11 +5079,14 @@ static irqreturn_t ufshcd_uic_cmd_compl(struct > ufs_hba *hba, u32 intr_status) > hba->active_uic_cmd->argument3 = > ufshcd_get_dme_attr_val(hba); > complete(&hba->active_uic_cmd->done); > + if (!hba->uic_async_done) > + hba->active_uic_cmd->cmd_active = 0; > retval = IRQ_HANDLED; > } > > if ((intr_status & UFSHCD_UIC_PWR_MASK) && hba->uic_async_done) { > complete(hba->uic_async_done); > + hba->active_uic_cmd->cmd_active = 0; > retval = IRQ_HANDLED; > } > return retval;
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 252e022..8b291c3 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -2131,10 +2131,20 @@ ufshcd_wait_for_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd) unsigned long flags; if (wait_for_completion_timeout(&uic_cmd->done, - msecs_to_jiffies(UIC_CMD_TIMEOUT))) + msecs_to_jiffies(UIC_CMD_TIMEOUT))) { ret = uic_cmd->argument2 & MASK_UIC_COMMAND_RESULT; - else + } else { ret = -ETIMEDOUT; + dev_err(hba->dev, + "uic cmd 0x%x with arg3 0x%x completion timeout\n", + uic_cmd->command, uic_cmd->argument3); + + if (!uic_cmd->cmd_active) { + dev_err(hba->dev, "%s: UIC cmd has been completed, return the result\n", + __func__); + ret = uic_cmd->argument2 & MASK_UIC_COMMAND_RESULT; + } + } spin_lock_irqsave(hba->host->host_lock, flags); hba->active_uic_cmd = NULL; @@ -2166,6 +2176,7 @@ __ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd, if (completion) init_completion(&uic_cmd->done); + uic_cmd->cmd_active = 1; ufshcd_dispatch_uic_cmd(hba, uic_cmd); return 0; @@ -3944,10 +3955,18 @@ static int ufshcd_uic_pwr_ctrl(struct ufs_hba *hba, struct uic_command *cmd) dev_err(hba->dev, "pwr ctrl cmd 0x%x with mode 0x%x completion timeout\n", cmd->command, cmd->argument3); + + if (!cmd->cmd_active) { + dev_err(hba->dev, "%s: Power Mode Change operation has been completed, go check UPMCRS\n", + __func__); + goto check_upmcrs; + } + ret = -ETIMEDOUT; goto out; } +check_upmcrs: status = ufshcd_get_upmcrs(hba); if (status != PWR_LOCAL) { dev_err(hba->dev, @@ -5060,11 +5079,14 @@ static irqreturn_t ufshcd_uic_cmd_compl(struct ufs_hba *hba, u32 intr_status) hba->active_uic_cmd->argument3 = ufshcd_get_dme_attr_val(hba); complete(&hba->active_uic_cmd->done); + if (!hba->uic_async_done) + hba->active_uic_cmd->cmd_active = 0; retval = IRQ_HANDLED; } if ((intr_status & UFSHCD_UIC_PWR_MASK) && hba->uic_async_done) { complete(hba->uic_async_done); + hba->active_uic_cmd->cmd_active = 0; retval = IRQ_HANDLED; } return retval;
Use the uic_cmd->cmd_active as a flag to track the lifecycle of an UIC cmd. The flag is set before send the UIC cmd and cleared after the completion is raised in IRQ handler. For a power mode change operation, including hibern8 enter/exit, the flag is cleared only after hba->uic_async_done completion is raised. When completion timeout happens, if the flag is cleared, instead of returning timeout error, simply ignore it. Change-Id: Ie3cd6ae6221a44619925fb2cf78136a5617fdd5d Signed-off-by: Can Guo <cang@codeaurora.org> --- drivers/scsi/ufs/ufshcd.c | 26 ++++++++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-)