On Fri, Oct 23, 2020 at 07:00:42PM -0700, Hemant Kumar wrote:
> Device provides the total number of HW channels it supports using MHI
> configuration register. Host supported HW channels shall not exceed
> that value. In order to make this check, a counter is needed to store
> total number of HW channels required by host.
>
> Signed-off-by: Hemant Kumar <hemantk@xxxxxxxxxxxxxx>
> ---
> drivers/bus/mhi/core/init.c | 2 ++
> drivers/bus/mhi/core/internal.h | 1 +
> include/linux/mhi.h | 1 +
> 3 files changed, 4 insertions(+)
>
> diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
> index 0ffdebd..70fd6af 100644
> --- a/drivers/bus/mhi/core/init.c
> +++ b/drivers/bus/mhi/core/init.c
> @@ -725,6 +725,8 @@ static int parse_ch_cfg(struct mhi_controller *mhi_cntrl,
> mhi_chan = &mhi_cntrl->mhi_chan[chan];
> mhi_chan->name = ch_cfg->name;
> mhi_chan->chan = chan;
> + if (chan >= MHI_HW_CHAN_START_IDX)
> + mhi_cntrl->hw_chan++;
>
> mhi_chan->tre_ring.elements = ch_cfg->num_elements;
> if (!mhi_chan->tre_ring.elements)
> diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h
> index 7989269..3d8e480 100644
> --- a/drivers/bus/mhi/core/internal.h
> +++ b/drivers/bus/mhi/core/internal.h
> @@ -454,6 +454,7 @@ enum mhi_pm_state {
> #define PRIMARY_CMD_RING 0
> #define MHI_DEV_WAKE_DB 127
> #define MHI_MAX_MTU 0xffff
> +#define MHI_HW_CHAN_START_IDX 100
> #define MHI_RANDOM_U32_NONZERO(bmsk) (prandom_u32_max(bmsk) + 1)
>
> enum mhi_er_type {
> diff --git a/include/linux/mhi.h b/include/linux/mhi.h
> index d4841e5..ea441d2 100644
> --- a/include/linux/mhi.h
> +++ b/include/linux/mhi.h
> @@ -389,6 +389,7 @@ struct mhi_controller {
> struct list_head lpm_chans;
> int *irq;
> u32 max_chan;
> + u32 hw_chan;
Please add Kdoc for this member. With that,
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Thanks,
Mani
> u32 total_ev_rings;
> u32 hw_ev_rings;
> u32 sw_ev_rings;
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
