* Re: [PATCH v2] bus: mhi: Add inbound buffers allocation flag
[not found] <1621603519-16773-1-git-send-email-loic.poulain@linaro.org>
@ 2021-05-21 16:35 ` Manivannan Sadhasivam
2021-06-11 7:00 ` Loic Poulain
0 siblings, 1 reply; 4+ messages in thread
From: Manivannan Sadhasivam @ 2021-05-21 16:35 UTC (permalink / raw)
To: Loic Poulain; +Cc: hemantk, linux-arm-msm, bbhatt, netdev, davem, kuba
+ netdev, Dave, Jakub
On Fri, May 21, 2021 at 03:25:19PM +0200, Loic Poulain wrote:
> Currently, the MHI controller driver defines which channels should
> have their inbound buffers allocated and queued. But ideally, this is
> something that should be decided by the MHI device driver instead,
> which actually deals with that buffers.
>
> Add a flag parameter to mhi_prepare_for_transfer allowing to specify
> if buffers have to be allocated and queued by the MHI stack.
>
> Keep auto_queue flag for now, but should be removed at some point.
>
> Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
> Tested-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
> Reviewed-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
> Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> ---
> v2: Update API in mhi_wwan_ctrl driver
>
> drivers/bus/mhi/core/internal.h | 2 +-
> drivers/bus/mhi/core/main.c | 11 ++++++++---
> drivers/net/mhi/net.c | 2 +-
> drivers/net/wwan/mhi_wwan_ctrl.c | 2 +-
Since this patch touches the drivers under net/, I need an Ack from Dave or
Jakub to take it via MHI tree.
Thanks,
Mani
> include/linux/mhi.h | 12 +++++++++++-
> net/qrtr/mhi.c | 2 +-
> 6 files changed, 23 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h
> index 5b9ea66..672052f 100644
> --- a/drivers/bus/mhi/core/internal.h
> +++ b/drivers/bus/mhi/core/internal.h
> @@ -682,7 +682,7 @@ void mhi_rddm_prepare(struct mhi_controller *mhi_cntrl,
> struct image_info *img_info);
> void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl);
> int mhi_prepare_channel(struct mhi_controller *mhi_cntrl,
> - struct mhi_chan *mhi_chan);
> + struct mhi_chan *mhi_chan, enum mhi_chan_flags flags);
> int mhi_init_chan_ctxt(struct mhi_controller *mhi_cntrl,
> struct mhi_chan *mhi_chan);
> void mhi_deinit_chan_ctxt(struct mhi_controller *mhi_cntrl,
> diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c
> index 0f1febf..432b53b 100644
> --- a/drivers/bus/mhi/core/main.c
> +++ b/drivers/bus/mhi/core/main.c
> @@ -1384,7 +1384,8 @@ static void mhi_unprepare_channel(struct mhi_controller *mhi_cntrl,
> }
>
> int mhi_prepare_channel(struct mhi_controller *mhi_cntrl,
> - struct mhi_chan *mhi_chan)
> + struct mhi_chan *mhi_chan,
> + enum mhi_chan_flags flags)
> {
> int ret = 0;
> struct device *dev = &mhi_chan->mhi_dev->dev;
> @@ -1409,6 +1410,9 @@ int mhi_prepare_channel(struct mhi_controller *mhi_cntrl,
> if (ret)
> goto error_pm_state;
>
> + if (mhi_chan->dir == DMA_FROM_DEVICE)
> + mhi_chan->pre_alloc = !!(flags & MHI_CH_INBOUND_ALLOC_BUFS);
> +
> /* Pre-allocate buffer for xfer ring */
> if (mhi_chan->pre_alloc) {
> int nr_el = get_nr_avail_ring_elements(mhi_cntrl,
> @@ -1555,7 +1559,8 @@ void mhi_reset_chan(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan)
> }
>
> /* Move channel to start state */
> -int mhi_prepare_for_transfer(struct mhi_device *mhi_dev)
> +int mhi_prepare_for_transfer(struct mhi_device *mhi_dev,
> + enum mhi_chan_flags flags)
> {
> int ret, dir;
> struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
> @@ -1566,7 +1571,7 @@ int mhi_prepare_for_transfer(struct mhi_device *mhi_dev)
> if (!mhi_chan)
> continue;
>
> - ret = mhi_prepare_channel(mhi_cntrl, mhi_chan);
> + ret = mhi_prepare_channel(mhi_cntrl, mhi_chan, flags);
> if (ret)
> goto error_open_chan;
> }
> diff --git a/drivers/net/mhi/net.c b/drivers/net/mhi/net.c
> index 6b5bf23..3ddfb72 100644
> --- a/drivers/net/mhi/net.c
> +++ b/drivers/net/mhi/net.c
> @@ -323,7 +323,7 @@ static int mhi_net_probe(struct mhi_device *mhi_dev,
> u64_stats_init(&mhi_netdev->stats.tx_syncp);
>
> /* Start MHI channels */
> - err = mhi_prepare_for_transfer(mhi_dev);
> + err = mhi_prepare_for_transfer(mhi_dev, 0);
> if (err)
> goto out_err;
>
> diff --git a/drivers/net/wwan/mhi_wwan_ctrl.c b/drivers/net/wwan/mhi_wwan_ctrl.c
> index 3a44b22..84e75e4 100644
> --- a/drivers/net/wwan/mhi_wwan_ctrl.c
> +++ b/drivers/net/wwan/mhi_wwan_ctrl.c
> @@ -110,7 +110,7 @@ static int mhi_wwan_ctrl_start(struct wwan_port *port)
> int ret;
>
> /* Start mhi device's channel(s) */
> - ret = mhi_prepare_for_transfer(mhiwwan->mhi_dev);
> + ret = mhi_prepare_for_transfer(mhiwwan->mhi_dev, 0);
> if (ret)
> return ret;
>
> diff --git a/include/linux/mhi.h b/include/linux/mhi.h
> index d095fba..9372acf 100644
> --- a/include/linux/mhi.h
> +++ b/include/linux/mhi.h
> @@ -60,6 +60,14 @@ enum mhi_flags {
> };
>
> /**
> + * enum mhi_chan_flags - MHI channel flags
> + * @MHI_CH_INBOUND_ALLOC_BUFS: Automatically allocate and queue inbound buffers
> + */
> +enum mhi_chan_flags {
> + MHI_CH_INBOUND_ALLOC_BUFS = BIT(0),
> +};
> +
> +/**
> * enum mhi_device_type - Device types
> * @MHI_DEVICE_XFER: Handles data transfer
> * @MHI_DEVICE_CONTROLLER: Control device
> @@ -719,8 +727,10 @@ void mhi_device_put(struct mhi_device *mhi_dev);
> * host and device execution environments match and
> * channels are in a DISABLED state.
> * @mhi_dev: Device associated with the channels
> + * @flags: MHI channel flags
> */
> -int mhi_prepare_for_transfer(struct mhi_device *mhi_dev);
> +int mhi_prepare_for_transfer(struct mhi_device *mhi_dev,
> + enum mhi_chan_flags flags);
>
> /**
> * mhi_unprepare_from_transfer - Reset UL and DL channels for data transfer.
> diff --git a/net/qrtr/mhi.c b/net/qrtr/mhi.c
> index 2bf2b19..47afded 100644
> --- a/net/qrtr/mhi.c
> +++ b/net/qrtr/mhi.c
> @@ -77,7 +77,7 @@ static int qcom_mhi_qrtr_probe(struct mhi_device *mhi_dev,
> int rc;
>
> /* start channels */
> - rc = mhi_prepare_for_transfer(mhi_dev);
> + rc = mhi_prepare_for_transfer(mhi_dev, MHI_CH_INBOUND_ALLOC_BUFS);
> if (rc)
> return rc;
>
> --
> 2.7.4
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v2] bus: mhi: Add inbound buffers allocation flag
2021-05-21 16:35 ` [PATCH v2] bus: mhi: Add inbound buffers allocation flag Manivannan Sadhasivam
@ 2021-06-11 7:00 ` Loic Poulain
2021-06-11 18:31 ` Jakub Kicinski
0 siblings, 1 reply; 4+ messages in thread
From: Loic Poulain @ 2021-06-11 7:00 UTC (permalink / raw)
To: Manivannan Sadhasivam, Jakub Kicinski, David Miller
Cc: Hemant Kumar, linux-arm-msm, Bhaumik Bhatt, Network Development
Hi Jakub, Dave,
On Fri, 21 May 2021 at 18:35, Manivannan Sadhasivam <mani@kernel.org> wrote:
>
> + netdev, Dave, Jakub
>
> On Fri, May 21, 2021 at 03:25:19PM +0200, Loic Poulain wrote:
> > Currently, the MHI controller driver defines which channels should
> > have their inbound buffers allocated and queued. But ideally, this is
> > something that should be decided by the MHI device driver instead,
> > which actually deals with that buffers.
> >
> > Add a flag parameter to mhi_prepare_for_transfer allowing to specify
> > if buffers have to be allocated and queued by the MHI stack.
> >
> > Keep auto_queue flag for now, but should be removed at some point.
> >
> > Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
> > Tested-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
> > Reviewed-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
> > Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
> > Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> > ---
> > v2: Update API in mhi_wwan_ctrl driver
> >
> > drivers/bus/mhi/core/internal.h | 2 +-
> > drivers/bus/mhi/core/main.c | 11 ++++++++---
> > drivers/net/mhi/net.c | 2 +-
> > drivers/net/wwan/mhi_wwan_ctrl.c | 2 +-
>
> Since this patch touches the drivers under net/, I need an Ack from Dave or
> Jakub to take it via MHI tree.
Could you please ack|nack this patch?
Thanks,
Loic
>
> > include/linux/mhi.h | 12 +++++++++++-
> > net/qrtr/mhi.c | 2 +-
> > 6 files changed, 23 insertions(+), 8 deletions(-)
> >
> > diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h
> > index 5b9ea66..672052f 100644
> > --- a/drivers/bus/mhi/core/internal.h
> > +++ b/drivers/bus/mhi/core/internal.h
> > @@ -682,7 +682,7 @@ void mhi_rddm_prepare(struct mhi_controller *mhi_cntrl,
> > struct image_info *img_info);
> > void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl);
> > int mhi_prepare_channel(struct mhi_controller *mhi_cntrl,
> > - struct mhi_chan *mhi_chan);
> > + struct mhi_chan *mhi_chan, enum mhi_chan_flags flags);
> > int mhi_init_chan_ctxt(struct mhi_controller *mhi_cntrl,
> > struct mhi_chan *mhi_chan);
> > void mhi_deinit_chan_ctxt(struct mhi_controller *mhi_cntrl,
> > diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c
> > index 0f1febf..432b53b 100644
> > --- a/drivers/bus/mhi/core/main.c
> > +++ b/drivers/bus/mhi/core/main.c
> > @@ -1384,7 +1384,8 @@ static void mhi_unprepare_channel(struct mhi_controller *mhi_cntrl,
> > }
> >
> > int mhi_prepare_channel(struct mhi_controller *mhi_cntrl,
> > - struct mhi_chan *mhi_chan)
> > + struct mhi_chan *mhi_chan,
> > + enum mhi_chan_flags flags)
> > {
> > int ret = 0;
> > struct device *dev = &mhi_chan->mhi_dev->dev;
> > @@ -1409,6 +1410,9 @@ int mhi_prepare_channel(struct mhi_controller *mhi_cntrl,
> > if (ret)
> > goto error_pm_state;
> >
> > + if (mhi_chan->dir == DMA_FROM_DEVICE)
> > + mhi_chan->pre_alloc = !!(flags & MHI_CH_INBOUND_ALLOC_BUFS);
> > +
> > /* Pre-allocate buffer for xfer ring */
> > if (mhi_chan->pre_alloc) {
> > int nr_el = get_nr_avail_ring_elements(mhi_cntrl,
> > @@ -1555,7 +1559,8 @@ void mhi_reset_chan(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan)
> > }
> >
> > /* Move channel to start state */
> > -int mhi_prepare_for_transfer(struct mhi_device *mhi_dev)
> > +int mhi_prepare_for_transfer(struct mhi_device *mhi_dev,
> > + enum mhi_chan_flags flags)
> > {
> > int ret, dir;
> > struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
> > @@ -1566,7 +1571,7 @@ int mhi_prepare_for_transfer(struct mhi_device *mhi_dev)
> > if (!mhi_chan)
> > continue;
> >
> > - ret = mhi_prepare_channel(mhi_cntrl, mhi_chan);
> > + ret = mhi_prepare_channel(mhi_cntrl, mhi_chan, flags);
> > if (ret)
> > goto error_open_chan;
> > }
> > diff --git a/drivers/net/mhi/net.c b/drivers/net/mhi/net.c
> > index 6b5bf23..3ddfb72 100644
> > --- a/drivers/net/mhi/net.c
> > +++ b/drivers/net/mhi/net.c
> > @@ -323,7 +323,7 @@ static int mhi_net_probe(struct mhi_device *mhi_dev,
> > u64_stats_init(&mhi_netdev->stats.tx_syncp);
> >
> > /* Start MHI channels */
> > - err = mhi_prepare_for_transfer(mhi_dev);
> > + err = mhi_prepare_for_transfer(mhi_dev, 0);
> > if (err)
> > goto out_err;
> >
> > diff --git a/drivers/net/wwan/mhi_wwan_ctrl.c b/drivers/net/wwan/mhi_wwan_ctrl.c
> > index 3a44b22..84e75e4 100644
> > --- a/drivers/net/wwan/mhi_wwan_ctrl.c
> > +++ b/drivers/net/wwan/mhi_wwan_ctrl.c
> > @@ -110,7 +110,7 @@ static int mhi_wwan_ctrl_start(struct wwan_port *port)
> > int ret;
> >
> > /* Start mhi device's channel(s) */
> > - ret = mhi_prepare_for_transfer(mhiwwan->mhi_dev);
> > + ret = mhi_prepare_for_transfer(mhiwwan->mhi_dev, 0);
> > if (ret)
> > return ret;
> >
> > diff --git a/include/linux/mhi.h b/include/linux/mhi.h
> > index d095fba..9372acf 100644
> > --- a/include/linux/mhi.h
> > +++ b/include/linux/mhi.h
> > @@ -60,6 +60,14 @@ enum mhi_flags {
> > };
> >
> > /**
> > + * enum mhi_chan_flags - MHI channel flags
> > + * @MHI_CH_INBOUND_ALLOC_BUFS: Automatically allocate and queue inbound buffers
> > + */
> > +enum mhi_chan_flags {
> > + MHI_CH_INBOUND_ALLOC_BUFS = BIT(0),
> > +};
> > +
> > +/**
> > * enum mhi_device_type - Device types
> > * @MHI_DEVICE_XFER: Handles data transfer
> > * @MHI_DEVICE_CONTROLLER: Control device
> > @@ -719,8 +727,10 @@ void mhi_device_put(struct mhi_device *mhi_dev);
> > * host and device execution environments match and
> > * channels are in a DISABLED state.
> > * @mhi_dev: Device associated with the channels
> > + * @flags: MHI channel flags
> > */
> > -int mhi_prepare_for_transfer(struct mhi_device *mhi_dev);
> > +int mhi_prepare_for_transfer(struct mhi_device *mhi_dev,
> > + enum mhi_chan_flags flags);
> >
> > /**
> > * mhi_unprepare_from_transfer - Reset UL and DL channels for data transfer.
> > diff --git a/net/qrtr/mhi.c b/net/qrtr/mhi.c
> > index 2bf2b19..47afded 100644
> > --- a/net/qrtr/mhi.c
> > +++ b/net/qrtr/mhi.c
> > @@ -77,7 +77,7 @@ static int qcom_mhi_qrtr_probe(struct mhi_device *mhi_dev,
> > int rc;
> >
> > /* start channels */
> > - rc = mhi_prepare_for_transfer(mhi_dev);
> > + rc = mhi_prepare_for_transfer(mhi_dev, MHI_CH_INBOUND_ALLOC_BUFS);
> > if (rc)
> > return rc;
> >
> > --
> > 2.7.4
> >
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v2] bus: mhi: Add inbound buffers allocation flag
2021-06-11 7:00 ` Loic Poulain
@ 2021-06-11 18:31 ` Jakub Kicinski
2021-06-12 6:47 ` Manivannan Sadhasivam
0 siblings, 1 reply; 4+ messages in thread
From: Jakub Kicinski @ 2021-06-11 18:31 UTC (permalink / raw)
To: Loic Poulain
Cc: Manivannan Sadhasivam, David Miller, Hemant Kumar, linux-arm-msm,
Bhaumik Bhatt, Network Development
On Fri, 11 Jun 2021 09:00:16 +0200 Loic Poulain wrote:
> > On Fri, May 21, 2021 at 03:25:19PM +0200, Loic Poulain wrote:
> > > Currently, the MHI controller driver defines which channels should
> > > have their inbound buffers allocated and queued. But ideally, this is
> > > something that should be decided by the MHI device driver instead,
> > > which actually deals with that buffers.
> > >
> > > Add a flag parameter to mhi_prepare_for_transfer allowing to specify
> > > if buffers have to be allocated and queued by the MHI stack.
> > >
> > > Keep auto_queue flag for now, but should be removed at some point.
> > >
> > > Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
> > > Tested-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
> > > Reviewed-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
> > > Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
> > > Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> > > ---
> > > v2: Update API in mhi_wwan_ctrl driver
> > >
> > > drivers/bus/mhi/core/internal.h | 2 +-
> > > drivers/bus/mhi/core/main.c | 11 ++++++++---
> > > drivers/net/mhi/net.c | 2 +-
> > > drivers/net/wwan/mhi_wwan_ctrl.c | 2 +-
> >
> > Since this patch touches the drivers under net/, I need an Ack from Dave or
> > Jakub to take it via MHI tree.
>
> Could you please ack|nack this patch?
Looks fine.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v2] bus: mhi: Add inbound buffers allocation flag
2021-06-11 18:31 ` Jakub Kicinski
@ 2021-06-12 6:47 ` Manivannan Sadhasivam
0 siblings, 0 replies; 4+ messages in thread
From: Manivannan Sadhasivam @ 2021-06-12 6:47 UTC (permalink / raw)
To: Jakub Kicinski
Cc: Loic Poulain, David Miller, Hemant Kumar, linux-arm-msm,
Bhaumik Bhatt, Network Development
On Fri, Jun 11, 2021 at 11:31:17AM -0700, Jakub Kicinski wrote:
> On Fri, 11 Jun 2021 09:00:16 +0200 Loic Poulain wrote:
> > > On Fri, May 21, 2021 at 03:25:19PM +0200, Loic Poulain wrote:
> > > > Currently, the MHI controller driver defines which channels should
> > > > have their inbound buffers allocated and queued. But ideally, this is
> > > > something that should be decided by the MHI device driver instead,
> > > > which actually deals with that buffers.
> > > >
> > > > Add a flag parameter to mhi_prepare_for_transfer allowing to specify
> > > > if buffers have to be allocated and queued by the MHI stack.
> > > >
> > > > Keep auto_queue flag for now, but should be removed at some point.
> > > >
> > > > Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
> > > > Tested-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
> > > > Reviewed-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
> > > > Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
> > > > Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> > > > ---
> > > > v2: Update API in mhi_wwan_ctrl driver
> > > >
> > > > drivers/bus/mhi/core/internal.h | 2 +-
> > > > drivers/bus/mhi/core/main.c | 11 ++++++++---
> > > > drivers/net/mhi/net.c | 2 +-
> > > > drivers/net/wwan/mhi_wwan_ctrl.c | 2 +-
> > >
> > > Since this patch touches the drivers under net/, I need an Ack from Dave or
> > > Jakub to take it via MHI tree.
> >
> > Could you please ack|nack this patch?
>
> Looks fine.
Thanks, I'll take it as an Ack.
Regards,
Mani
^ permalink raw reply [flat|nested] 4+ messages in thread
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2021-05-21 16:35 ` [PATCH v2] bus: mhi: Add inbound buffers allocation flag Manivannan Sadhasivam
2021-06-11 7:00 ` Loic Poulain
2021-06-11 18:31 ` Jakub Kicinski
2021-06-12 6:47 ` Manivannan Sadhasivam
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