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Commit fa52163c authored by Elson Roy Serrao's avatar Elson Roy Serrao Committed by Udipto Goswami
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usb: dwc3: Add logging for ep0 map/unmap requests 



Log the ep0 dma map/unmap request  in the IPC log buffer
for debugging SMMU faults.

Logs can be accessed using below command
cat /sys/kernel/debug/ipc_logging/a600000.dwc3.ep_events/log.

Change-Id: If5587b8ba59451593968999b59cd61f2a469fe1c
Signed-off-by: default avatarElson Roy Serrao <eserrao@codeaurora.org>
Signed-off-by: default avatarUdipto Goswami <ugoswami@codeaurora.org>
parent 1fa28c49

drivers/usb/dwc3/debug_ipc.c

+0 −6
Original line number Diff line number Diff line
@@ -140,9 +140,6 @@ void dwc3_dbg_print_reg(struct dwc3 *dwc, const char *name, int reg) 


void dwc3_dbg_dma_unmap(struct dwc3 *dwc, u8 ep_num, struct dwc3_request *req)

{

	if (ep_num < 2)

		return;



	ipc_log_string(dwc->dwc_dma_ipc_log_ctxt,

		"%02X-%-3.3s %-25.25s 0x%pK 0x%lx %u 0x%lx %d", ep_num >> 1,

		ep_num & 1 ? "IN":"OUT", "UNMAP", &req->request,
@@ -152,9 +149,6 @@ void dwc3_dbg_dma_unmap(struct dwc3 *dwc, u8 ep_num, struct dwc3_request *req) 


void dwc3_dbg_dma_map(struct dwc3 *dwc, u8 ep_num, struct dwc3_request *req)

{

	if (ep_num < 2)

		return;



	ipc_log_string(dwc->dwc_dma_ipc_log_ctxt,

		"%02X-%-3.3s %-25.25s 0x%pK 0x%lx %u 0x%lx", ep_num >> 1,

		ep_num & 1 ? "IN":"OUT", "MAP", &req->request, req->request.dma,

drivers/usb/dwc3/ep0.c

+3 −0
Original line number Diff line number Diff line
@@ -1027,6 +1027,7 @@ static void __dwc3_ep0_do_control_data(struct dwc3 *dwc, 
					 true);



		req->trb = &dwc->ep0_trb[dep->trb_enqueue - 1];

		dbg_ep_map(dep->number, req);



		/* Now prepare one extra TRB to align transfer size */

		dwc3_ep0_prepare_one_trb(dep, dwc->bounce_addr,
@@ -1049,6 +1050,7 @@ static void __dwc3_ep0_do_control_data(struct dwc3 *dwc, 
					 true);



		req->trb = &dwc->ep0_trb[dep->trb_enqueue - 1];

		dbg_ep_map(dep->number, req);



		/* Now prepare one extra TRB to align transfer size */

		dwc3_ep0_prepare_one_trb(dep, dwc->bounce_addr,
@@ -1066,6 +1068,7 @@ static void __dwc3_ep0_do_control_data(struct dwc3 *dwc, 
				false);



		req->trb = &dwc->ep0_trb[dep->trb_enqueue];

		dbg_ep_map(dep->number, req);



		ret = dwc3_ep0_start_trans(dep);

	}