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Subject[PATCH 2/9] usb: dwc3: gadget: use generic map/unmap routines
Date
those routines have everything we need to map/unmap
USB requests and it's better to use them.

Signed-off-by: Felipe Balbi <balbi@ti.com>
---
drivers/usb/dwc3/gadget.c | 80 +++++++--------------------------------------
1 files changed, 12 insertions(+), 68 deletions(-)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index d228188..50e955f 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -54,70 +54,6 @@
#include "gadget.h"
#include "io.h"

-#define DMA_ADDR_INVALID (~(dma_addr_t)0)
-
-void dwc3_map_buffer_to_dma(struct dwc3_request *req)
-{
- struct dwc3 *dwc = req->dep->dwc;
-
- if (req->request.length == 0) {
- /* req->request.dma = dwc->setup_buf_addr; */
- return;
- }
-
- if (req->request.num_sgs) {
- int mapped;
-
- mapped = dma_map_sg(dwc->dev, req->request.sg,
- req->request.num_sgs,
- req->direction ? DMA_TO_DEVICE
- : DMA_FROM_DEVICE);
- if (mapped < 0) {
- dev_err(dwc->dev, "failed to map SGs\n");
- return;
- }
-
- req->request.num_mapped_sgs = mapped;
- return;
- }
-
- if (req->request.dma == DMA_ADDR_INVALID) {
- req->request.dma = dma_map_single(dwc->dev, req->request.buf,
- req->request.length, req->direction
- ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
- req->mapped = true;
- }
-}
-
-void dwc3_unmap_buffer_from_dma(struct dwc3_request *req)
-{
- struct dwc3 *dwc = req->dep->dwc;
-
- if (req->request.length == 0) {
- req->request.dma = DMA_ADDR_INVALID;
- return;
- }
-
- if (req->request.num_mapped_sgs) {
- req->request.dma = DMA_ADDR_INVALID;
- dma_unmap_sg(dwc->dev, req->request.sg,
- req->request.num_sgs,
- req->direction ? DMA_TO_DEVICE
- : DMA_FROM_DEVICE);
-
- req->request.num_mapped_sgs = 0;
- return;
- }
-
- if (req->mapped) {
- dma_unmap_single(dwc->dev, req->request.dma,
- req->request.length, req->direction
- ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
- req->mapped = 0;
- req->request.dma = DMA_ADDR_INVALID;
- }
-}
-
void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
int status)
{
@@ -144,7 +80,8 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
if (req->request.status == -EINPROGRESS)
req->request.status = status;

- dwc3_unmap_buffer_from_dma(req);
+ usb_gadget_unmap_request(&dwc->gadget, &req->request,
+ req->direction);

dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n",
req, dep->name, req->request.actual,
@@ -558,7 +495,6 @@ static struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep,

req->epnum = dep->number;
req->dep = dep;
- req->request.dma = DMA_ADDR_INVALID;

return &req->request;
}
@@ -817,7 +753,8 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param,
* here and stop, unmap, free and del each of the linked
* requests instead of we do now.
*/
- dwc3_unmap_buffer_from_dma(req);
+ usb_gadget_unmap_request(&dwc->gadget, &req->request,
+ req->direction);
list_del(&req->list);
return ret;
}
@@ -832,6 +769,9 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param,

static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
{
+ struct dwc3 *dwc = dep->dwc;
+ int ret;
+
req->request.actual = 0;
req->request.status = -EINPROGRESS;
req->direction = dep->direction;
@@ -849,7 +789,11 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
* This will also avoid Host cancelling URBs due to too
* many NACKs.
*/
- dwc3_map_buffer_to_dma(req);
+ ret = usb_gadget_map_request(&dwc->gadget, &req->request,
+ dep->direction);
+ if (ret)
+ return ret;
+
list_add_tail(&req->list, &dep->request_list);

/*
--
1.7.8.rc3


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