On Thu, Jul 13, 2023 at 12:40:12PM +0530, Krishna chaitanya chundru wrote:
> Add support for handling D-state notify for MHI EPF.
>
> Signed-off-by: Krishna chaitanya chundru <quic_krichai@xxxxxxxxxxx>
> ---
> drivers/pci/endpoint/functions/pci-epf-mhi.c | 11 +++++++++++
> include/linux/mhi_ep.h | 3 +++
> 2 files changed, 14 insertions(+)
>
> diff --git a/drivers/pci/endpoint/functions/pci-epf-mhi.c b/drivers/pci/endpoint/functions/pci-epf-mhi.c
> index 9c1f5a1..ee91bfc 100644
> --- a/drivers/pci/endpoint/functions/pci-epf-mhi.c
> +++ b/drivers/pci/endpoint/functions/pci-epf-mhi.c
> @@ -339,6 +339,16 @@ static int pci_epf_mhi_bme(struct pci_epf *epf)
> return 0;
> }
>
> +static int pci_epf_mhi_dstate_notify(struct pci_epf *epf, pci_power_t state)
> +{
> + struct pci_epf_mhi *epf_mhi = epf_get_drvdata(epf);
> + struct mhi_ep_cntrl *mhi_cntrl = &epf_mhi->mhi_cntrl;
> +
> + mhi_cntrl->dstate = state;
Where is this variable being used? Also, don't we need any locking?
- Mani
> +
> + return 0;
> +}
> +
> static int pci_epf_mhi_bind(struct pci_epf *epf)
> {
> struct pci_epf_mhi *epf_mhi = epf_get_drvdata(epf);
> @@ -394,6 +404,7 @@ static struct pci_epc_event_ops pci_epf_mhi_event_ops = {
> .link_up = pci_epf_mhi_link_up,
> .link_down = pci_epf_mhi_link_down,
> .bme = pci_epf_mhi_bme,
> + .dstate_notify = pci_epf_mhi_dstate_notify,
> };
>
> static int pci_epf_mhi_probe(struct pci_epf *epf,
> diff --git a/include/linux/mhi_ep.h b/include/linux/mhi_ep.h
> index f198a8a..c3a0685 100644
> --- a/include/linux/mhi_ep.h
> +++ b/include/linux/mhi_ep.h
> @@ -8,6 +8,7 @@
>
> #include <linux/dma-direction.h>
> #include <linux/mhi.h>
> +#include <linux/pci.h>
>
> #define MHI_EP_DEFAULT_MTU 0x8000
>
> @@ -139,6 +140,8 @@ struct mhi_ep_cntrl {
>
> enum mhi_state mhi_state;
>
> + pci_power_t dstate;
> +
> u32 max_chan;
> u32 mru;
> u32 event_rings;
> --
> 2.7.4
>
--
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