| Message ID | 1624053903-24653-2-git-send-email-bbhatt@codeaurora.org |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] bus: mhi: core: Add support for processing priority of event ring | expand |
On Fri, Jun 18, 2021 at 03:05:03PM -0700, Bhaumik Bhatt wrote: > From: Hemant Kumar <hemantk@codeaurora.org> > > Event ring priorities are currently set to 1 and are unused. > Default processing priority for event rings is set to regular > tasklet. Controllers can choose to use high priority tasklet > scheduling for certain event rings critical for processing such > as ones transporting control information if they wish to avoid > system scheduling delays for those packets. In order to support > these use cases, allow controllers to set event ring priority to > high. > > Signed-off-by: Hemant Kumar <hemantk@codeaurora.org> > Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Thanks, Mani > --- > drivers/bus/mhi/core/init.c | 3 +-- > drivers/bus/mhi/core/main.c | 9 +++++++-- > include/linux/mhi.h | 2 +- > 3 files changed, 9 insertions(+), 5 deletions(-) > > diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c > index c81b377..4446760 100644 > --- a/drivers/bus/mhi/core/init.c > +++ b/drivers/bus/mhi/core/init.c > @@ -673,8 +673,7 @@ static int parse_ev_cfg(struct mhi_controller *mhi_cntrl, > &mhi_cntrl->mhi_chan[mhi_event->chan]; > } > > - /* Priority is fixed to 1 for now */ > - mhi_event->priority = 1; > + mhi_event->priority = event_cfg->priority; > > mhi_event->db_cfg.brstmode = event_cfg->mode; > if (MHI_INVALID_BRSTMODE(mhi_event->db_cfg.brstmode)) > diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c > index 8ac73f9..3775c77 100644 > --- a/drivers/bus/mhi/core/main.c > +++ b/drivers/bus/mhi/core/main.c > @@ -454,10 +454,15 @@ irqreturn_t mhi_irq_handler(int irq_number, void *dev) > > if (mhi_dev) > mhi_notify(mhi_dev, MHI_CB_PENDING_DATA); > - } else { > - tasklet_schedule(&mhi_event->task); > + > + return IRQ_HANDLED; > } > > + if (!mhi_event->priority) > + tasklet_hi_schedule(&mhi_event->task); > + else > + tasklet_schedule(&mhi_event->task); > + > return IRQ_HANDLED; > } > > diff --git a/include/linux/mhi.h b/include/linux/mhi.h > index 86cea52..bf23c21 100644 > --- a/include/linux/mhi.h > +++ b/include/linux/mhi.h > @@ -250,7 +250,7 @@ struct mhi_channel_config { > * @irq_moderation_ms: Delay irq for additional events to be aggregated > * @irq: IRQ associated with this ring > * @channel: Dedicated channel number. U32_MAX indicates a non-dedicated ring > - * @priority: Priority of this ring. Use 1 for now > + * @priority: Processing priority of this ring. 0 is high and 1 is regular > * @mode: Doorbell mode > * @data_type: Type of data this ring will process > * @hardware_event: This ring is associated with hardware channels > -- > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, > a Linux Foundation Collaborative Project >
On Fri, Jun 18, 2021 at 03:05:03PM -0700, Bhaumik Bhatt wrote: > From: Hemant Kumar <hemantk@codeaurora.org> > > Event ring priorities are currently set to 1 and are unused. > Default processing priority for event rings is set to regular > tasklet. Controllers can choose to use high priority tasklet > scheduling for certain event rings critical for processing such > as ones transporting control information if they wish to avoid > system scheduling delays for those packets. In order to support > these use cases, allow controllers to set event ring priority to > high. > > Signed-off-by: Hemant Kumar <hemantk@codeaurora.org> > Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org> Applied to mhi-next! Thanks, Mani > --- > drivers/bus/mhi/core/init.c | 3 +-- > drivers/bus/mhi/core/main.c | 9 +++++++-- > include/linux/mhi.h | 2 +- > 3 files changed, 9 insertions(+), 5 deletions(-) > > diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c > index c81b377..4446760 100644 > --- a/drivers/bus/mhi/core/init.c > +++ b/drivers/bus/mhi/core/init.c > @@ -673,8 +673,7 @@ static int parse_ev_cfg(struct mhi_controller *mhi_cntrl, > &mhi_cntrl->mhi_chan[mhi_event->chan]; > } > > - /* Priority is fixed to 1 for now */ > - mhi_event->priority = 1; > + mhi_event->priority = event_cfg->priority; > > mhi_event->db_cfg.brstmode = event_cfg->mode; > if (MHI_INVALID_BRSTMODE(mhi_event->db_cfg.brstmode)) > diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c > index 8ac73f9..3775c77 100644 > --- a/drivers/bus/mhi/core/main.c > +++ b/drivers/bus/mhi/core/main.c > @@ -454,10 +454,15 @@ irqreturn_t mhi_irq_handler(int irq_number, void *dev) > > if (mhi_dev) > mhi_notify(mhi_dev, MHI_CB_PENDING_DATA); > - } else { > - tasklet_schedule(&mhi_event->task); > + > + return IRQ_HANDLED; > } > > + if (!mhi_event->priority) > + tasklet_hi_schedule(&mhi_event->task); > + else > + tasklet_schedule(&mhi_event->task); > + > return IRQ_HANDLED; > } > > diff --git a/include/linux/mhi.h b/include/linux/mhi.h > index 86cea52..bf23c21 100644 > --- a/include/linux/mhi.h > +++ b/include/linux/mhi.h > @@ -250,7 +250,7 @@ struct mhi_channel_config { > * @irq_moderation_ms: Delay irq for additional events to be aggregated > * @irq: IRQ associated with this ring > * @channel: Dedicated channel number. U32_MAX indicates a non-dedicated ring > - * @priority: Priority of this ring. Use 1 for now > + * @priority: Processing priority of this ring. 0 is high and 1 is regular > * @mode: Doorbell mode > * @data_type: Type of data this ring will process > * @hardware_event: This ring is associated with hardware channels > -- > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, > a Linux Foundation Collaborative Project >
diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c index c81b377..4446760 100644 --- a/drivers/bus/mhi/core/init.c +++ b/drivers/bus/mhi/core/init.c @@ -673,8 +673,7 @@ static int parse_ev_cfg(struct mhi_controller *mhi_cntrl, &mhi_cntrl->mhi_chan[mhi_event->chan]; } - /* Priority is fixed to 1 for now */ - mhi_event->priority = 1; + mhi_event->priority = event_cfg->priority; mhi_event->db_cfg.brstmode = event_cfg->mode; if (MHI_INVALID_BRSTMODE(mhi_event->db_cfg.brstmode)) diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c index 8ac73f9..3775c77 100644 --- a/drivers/bus/mhi/core/main.c +++ b/drivers/bus/mhi/core/main.c @@ -454,10 +454,15 @@ irqreturn_t mhi_irq_handler(int irq_number, void *dev) if (mhi_dev) mhi_notify(mhi_dev, MHI_CB_PENDING_DATA); - } else { - tasklet_schedule(&mhi_event->task); + + return IRQ_HANDLED; } + if (!mhi_event->priority) + tasklet_hi_schedule(&mhi_event->task); + else + tasklet_schedule(&mhi_event->task); + return IRQ_HANDLED; } diff --git a/include/linux/mhi.h b/include/linux/mhi.h index 86cea52..bf23c21 100644 --- a/include/linux/mhi.h +++ b/include/linux/mhi.h @@ -250,7 +250,7 @@ struct mhi_channel_config { * @irq_moderation_ms: Delay irq for additional events to be aggregated * @irq: IRQ associated with this ring * @channel: Dedicated channel number. U32_MAX indicates a non-dedicated ring - * @priority: Priority of this ring. Use 1 for now + * @priority: Processing priority of this ring. 0 is high and 1 is regular * @mode: Doorbell mode * @data_type: Type of data this ring will process * @hardware_event: This ring is associated with hardware channels