[PATCH 1/3] usb: dwc3: allocate setup_buf with dma_alloc_coherent()
Neil Armstrong
neil.armstrong at linaro.org
Fri Jul 19 15:56:50 CEST 2024
Also allocate the setup_buf with dma_alloc_coherent() since it's
also consumed by the hardware DMA.
Signed-off-by: Neil Armstrong <neil.armstrong at linaro.org>
---
drivers/usb/dwc3/core.h | 2 ++
drivers/usb/dwc3/ep0.c | 4 ++--
drivers/usb/dwc3/gadget.c | 8 ++++----
3 files changed, 8 insertions(+), 6 deletions(-)
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 7374ce950da..ce35460c405 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -670,6 +670,7 @@ struct dwc3_scratchpad_array {
* @ep0_trb: dma address of ep0_trb
* @ep0_usb_req: dummy req used while handling STD USB requests
* @ep0_bounce_addr: dma address of ep0_bounce
+ * @setup_buf_addr: dma address if setup_buf
* @scratch_addr: dma address of scratchbuf
* @lock: for synchronizing
* @dev: pointer to our struct device
@@ -757,6 +758,7 @@ struct dwc3 {
dma_addr_t ep0_trb_addr;
dma_addr_t ep0_bounce_addr;
dma_addr_t scratch_addr;
+ dma_addr_t setup_buf_addr;
struct dwc3_request ep0_usb_req;
/* device lock */
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 16b11ce3d9f..0c7e0123368 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -381,7 +381,7 @@ static int dwc3_ep0_handle_status(struct dwc3 *dwc,
dep = dwc->eps[0];
dwc->ep0_usb_req.dep = dep;
dwc->ep0_usb_req.request.length = sizeof(*response_pkt);
- dwc->ep0_usb_req.request.buf = dwc->setup_buf;
+ dwc->ep0_usb_req.request.buf = (void *)dwc->setup_buf_addr;
dwc->ep0_usb_req.request.complete = dwc3_ep0_status_cmpl;
return __dwc3_gadget_ep0_queue(dep, &dwc->ep0_usb_req);
@@ -663,7 +663,7 @@ static int dwc3_ep0_set_sel(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
dep = dwc->eps[0];
dwc->ep0_usb_req.dep = dep;
dwc->ep0_usb_req.request.length = dep->endpoint.maxpacket;
- dwc->ep0_usb_req.request.buf = dwc->setup_buf;
+ dwc->ep0_usb_req.request.buf = (void *)dwc->setup_buf_addr;
dwc->ep0_usb_req.request.complete = dwc3_ep0_set_sel_cmpl;
return __dwc3_gadget_ep0_queue(dep, &dwc->ep0_usb_req);
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 7d6bcc2627f..d41b590afb8 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2622,8 +2622,8 @@ int dwc3_gadget_init(struct dwc3 *dwc)
goto err1;
}
- dwc->setup_buf = memalign(CONFIG_SYS_CACHELINE_SIZE,
- DWC3_EP0_BOUNCE_SIZE);
+ dwc->setup_buf = dma_alloc_coherent(DWC3_EP0_BOUNCE_SIZE,
+ (unsigned long *)&dwc->setup_buf_addr);
if (!dwc->setup_buf) {
ret = -ENOMEM;
goto err2;
@@ -2670,7 +2670,7 @@ err4:
dma_free_coherent(dwc->ep0_bounce);
err3:
- kfree(dwc->setup_buf);
+ dma_free_coherent(dwc->setup_buf);
err2:
dma_free_coherent(dwc->ep0_trb);
@@ -2692,7 +2692,7 @@ void dwc3_gadget_exit(struct dwc3 *dwc)
dma_free_coherent(dwc->ep0_bounce);
- kfree(dwc->setup_buf);
+ dma_free_coherent(dwc->setup_buf);
dma_free_coherent(dwc->ep0_trb);
--
2.34.1
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