On 7/7/2023 11:44 AM, Manivannan Sadhasivam wrote:
On Fri, Jun 30, 2023 at 04:22:10PM +0530, Krishna chaitanya chundru wrote:
Add wakeup host op for MHI EPF.
If the D-state is in D3cold toggle wake signal, otherwise send PME.
Signed-off-by: Krishna chaitanya chundru <quic_krichai@xxxxxxxxxxx>
---
drivers/pci/endpoint/functions/pci-epf-mhi.c | 19 +++++++++++++++++++
include/linux/mhi_ep.h | 1 +
2 files changed, 20 insertions(+)
diff --git a/drivers/pci/endpoint/functions/pci-epf-mhi.c b/drivers/pci/endpoint/functions/pci-epf-mhi.c
index 64ff37d..deb742c 100644
--- a/drivers/pci/endpoint/functions/pci-epf-mhi.c
+++ b/drivers/pci/endpoint/functions/pci-epf-mhi.c
@@ -237,6 +237,24 @@ static int pci_epf_mhi_write_to_host(struct mhi_ep_cntrl *mhi_cntrl,
return 0;
}
+static int pci_epf_mhi_wakeup_host(struct mhi_ep_cntrl *mhi_cntrl)
+{
+ struct pci_epf_mhi *epf_mhi = to_epf_mhi(mhi_cntrl);
+ struct pci_epf *epf = epf_mhi->epf;
+ struct pci_epc *epc = epf->epc;
+ int ret;
+
+ if (mhi_cntrl->dstate == PCI_D3cold)
+ ret = pci_epc_wakeup_host(epc, epf->func_no,
+ epf->vfunc_no, PCI_WAKEUP_TOGGLE_WAKE);
+ else
+ ret = pci_epc_wakeup_host(epc, epf->func_no,
+ epf->vfunc_no, PCI_WAKEUP_SEND_PME);
+
If the wakeup argument is of type bool (ie. bool use_pme), then
wakeup = (mhi_cntrl->dstate == PCI_D3cold) ? false : true;
return pci_epc_wakeup_host(epc, epf->func_no, epf->vfunc_no, state);
- Mani
better to use type as it as it has more readability
but I have taken your inputs here and will change the code as suggetsed.
- KC
+ return ret;
+
+}
+
static int pci_epf_mhi_core_init(struct pci_epf *epf)
{
struct pci_epf_mhi *epf_mhi = epf_get_drvdata(epf);
@@ -293,6 +311,7 @@ static int pci_epf_mhi_link_up(struct pci_epf *epf)
mhi_cntrl->unmap_free = pci_epf_mhi_unmap_free;
mhi_cntrl->read_from_host = pci_epf_mhi_read_from_host;
mhi_cntrl->write_to_host = pci_epf_mhi_write_to_host;
+ mhi_cntrl->wakeup_host = pci_epf_mhi_wakeup_host;
/* Register the MHI EP controller */
ret = mhi_ep_register_controller(mhi_cntrl, info->config);
diff --git a/include/linux/mhi_ep.h b/include/linux/mhi_ep.h
index c3a0685..e353c429 100644
--- a/include/linux/mhi_ep.h
+++ b/include/linux/mhi_ep.h
@@ -137,6 +137,7 @@ struct mhi_ep_cntrl {
void __iomem *virt, size_t size);
int (*read_from_host)(struct mhi_ep_cntrl *mhi_cntrl, u64 from, void *to, size_t size);
int (*write_to_host)(struct mhi_ep_cntrl *mhi_cntrl, void *from, u64 to, size_t size);
+ int (*wakeup_host)(struct mhi_ep_cntrl *mhi_cntrl);
enum mhi_state mhi_state;
--
2.7.4
