usb: dwc3: gadget: use generic map/unmap routines
those routines have everything we need to map/unmap USB requests and it's better to use them. In order to achieve that, we had to add a simple change on how we allocate and use our setup buffer; we cannot allocate it from coherent anymore otherwise the generic map/unmap routines won't be able to easily know that the GetStatus request already has a DMA address. Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Felipe Balbi
parent
a698908d3b
commit
0fc9a1be09
4 changed files with 30 additions and 83 deletions
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@ -572,7 +572,6 @@ struct dwc3_request {
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* @ctrl_req_addr: dma address of ctrl_req
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* @ep0_trb: dma address of ep0_trb
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* @ep0_usb_req: dummy req used while handling STD USB requests
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* @setup_buf_addr: dma address of setup_buf
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* @ep0_bounce_addr: dma address of ep0_bounce
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* @lock: for synchronizing
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* @dev: pointer to our struct device
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@ -609,7 +608,6 @@ struct dwc3 {
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u8 *setup_buf;
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dma_addr_t ctrl_req_addr;
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dma_addr_t ep0_trb_addr;
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dma_addr_t setup_buf_addr;
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dma_addr_t ep0_bounce_addr;
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struct dwc3_request ep0_usb_req;
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/* device lock */
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@ -309,7 +309,7 @@ static int dwc3_ep0_handle_status(struct dwc3 *dwc,
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dep = dwc->eps[0];
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dwc->ep0_usb_req.dep = dep;
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dwc->ep0_usb_req.request.length = sizeof(*response_pkt);
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dwc->ep0_usb_req.request.dma = dwc->setup_buf_addr;
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dwc->ep0_usb_req.request.buf = dwc->setup_buf;
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dwc->ep0_usb_req.request.complete = dwc3_ep0_status_cmpl;
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return __dwc3_gadget_ep0_queue(dep, &dwc->ep0_usb_req);
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@ -686,7 +686,12 @@ static void dwc3_ep0_do_control_data(struct dwc3 *dwc,
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DWC3_TRBCTL_CONTROL_DATA);
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} else if ((req->request.length % dep->endpoint.maxpacket)
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&& (event->endpoint_number == 0)) {
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dwc3_map_buffer_to_dma(req);
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ret = usb_gadget_map_request(&dwc->gadget, &req->request,
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event->endpoint_number);
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if (ret) {
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dev_dbg(dwc->dev, "failed to map request\n");
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return;
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}
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WARN_ON(req->request.length > dep->endpoint.maxpacket);
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@ -701,7 +706,12 @@ static void dwc3_ep0_do_control_data(struct dwc3 *dwc,
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dwc->ep0_bounce_addr, dep->endpoint.maxpacket,
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DWC3_TRBCTL_CONTROL_DATA);
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} else {
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dwc3_map_buffer_to_dma(req);
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ret = usb_gadget_map_request(&dwc->gadget, &req->request,
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event->endpoint_number);
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if (ret) {
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dev_dbg(dwc->dev, "failed to map request\n");
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return;
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}
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ret = dwc3_ep0_start_trans(dwc, event->endpoint_number,
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req->request.dma, req->request.length,
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@ -54,70 +54,6 @@
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#include "gadget.h"
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#include "io.h"
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#define DMA_ADDR_INVALID (~(dma_addr_t)0)
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void dwc3_map_buffer_to_dma(struct dwc3_request *req)
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{
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struct dwc3 *dwc = req->dep->dwc;
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if (req->request.length == 0) {
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/* req->request.dma = dwc->setup_buf_addr; */
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return;
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}
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if (req->request.num_sgs) {
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int mapped;
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mapped = dma_map_sg(dwc->dev, req->request.sg,
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req->request.num_sgs,
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req->direction ? DMA_TO_DEVICE
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: DMA_FROM_DEVICE);
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if (mapped < 0) {
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dev_err(dwc->dev, "failed to map SGs\n");
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return;
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}
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req->request.num_mapped_sgs = mapped;
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return;
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}
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if (req->request.dma == DMA_ADDR_INVALID) {
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req->request.dma = dma_map_single(dwc->dev, req->request.buf,
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req->request.length, req->direction
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? DMA_TO_DEVICE : DMA_FROM_DEVICE);
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req->mapped = true;
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}
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}
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void dwc3_unmap_buffer_from_dma(struct dwc3_request *req)
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{
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struct dwc3 *dwc = req->dep->dwc;
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if (req->request.length == 0) {
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req->request.dma = DMA_ADDR_INVALID;
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return;
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}
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if (req->request.num_mapped_sgs) {
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req->request.dma = DMA_ADDR_INVALID;
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dma_unmap_sg(dwc->dev, req->request.sg,
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req->request.num_sgs,
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req->direction ? DMA_TO_DEVICE
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: DMA_FROM_DEVICE);
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req->request.num_mapped_sgs = 0;
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return;
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}
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if (req->mapped) {
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dma_unmap_single(dwc->dev, req->request.dma,
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req->request.length, req->direction
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? DMA_TO_DEVICE : DMA_FROM_DEVICE);
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req->mapped = 0;
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req->request.dma = DMA_ADDR_INVALID;
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}
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}
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void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
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int status)
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{
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@ -144,14 +80,15 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
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if (req->request.status == -EINPROGRESS)
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req->request.status = status;
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dwc3_unmap_buffer_from_dma(req);
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usb_gadget_unmap_request(&dwc->gadget, &req->request,
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req->direction);
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dev_dbg(dwc->dev, "request %p from %s completed %d/%d ===> %d\n",
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req, dep->name, req->request.actual,
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req->request.length, status);
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spin_unlock(&dwc->lock);
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req->request.complete(&req->dep->endpoint, &req->request);
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req->request.complete(&dep->endpoint, &req->request);
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spin_lock(&dwc->lock);
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}
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@ -563,7 +500,6 @@ static struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep,
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req->epnum = dep->number;
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req->dep = dep;
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req->request.dma = DMA_ADDR_INVALID;
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return &req->request;
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}
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@ -822,7 +758,8 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param,
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* here and stop, unmap, free and del each of the linked
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* requests instead of we do now.
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*/
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dwc3_unmap_buffer_from_dma(req);
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usb_gadget_unmap_request(&dwc->gadget, &req->request,
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req->direction);
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list_del(&req->list);
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return ret;
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}
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@ -838,6 +775,9 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param,
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static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
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{
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struct dwc3 *dwc = dep->dwc;
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int ret;
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req->request.actual = 0;
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req->request.status = -EINPROGRESS;
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req->direction = dep->direction;
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@ -855,7 +795,11 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
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* This will also avoid Host cancelling URBs due to too
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* many NACKs.
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*/
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dwc3_map_buffer_to_dma(req);
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ret = usb_gadget_map_request(&dwc->gadget, &req->request,
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dep->direction);
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if (ret)
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return ret;
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list_add_tail(&req->list, &dep->request_list);
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/*
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@ -2150,9 +2094,8 @@ int __devinit dwc3_gadget_init(struct dwc3 *dwc)
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goto err1;
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}
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dwc->setup_buf = dma_alloc_coherent(dwc->dev,
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sizeof(*dwc->setup_buf) * 2,
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&dwc->setup_buf_addr, GFP_KERNEL);
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dwc->setup_buf = kzalloc(sizeof(*dwc->setup_buf) * 2,
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GFP_KERNEL);
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if (!dwc->setup_buf) {
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dev_err(dwc->dev, "failed to allocate setup buffer\n");
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ret = -ENOMEM;
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@ -2243,8 +2186,7 @@ err4:
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dwc->ep0_bounce_addr);
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err3:
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dma_free_coherent(dwc->dev, sizeof(*dwc->setup_buf) * 2,
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dwc->setup_buf, dwc->setup_buf_addr);
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kfree(dwc->setup_buf);
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err2:
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dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb),
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@ -2273,8 +2215,7 @@ void dwc3_gadget_exit(struct dwc3 *dwc)
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dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce,
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dwc->ep0_bounce_addr);
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dma_free_coherent(dwc->dev, sizeof(*dwc->setup_buf) * 2,
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dwc->setup_buf, dwc->setup_buf_addr);
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kfree(dwc->setup_buf);
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dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb),
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dwc->ep0_trb, dwc->ep0_trb_addr);
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@ -108,8 +108,6 @@ int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
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int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value);
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int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
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unsigned cmd, struct dwc3_gadget_ep_cmd_params *params);
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void dwc3_map_buffer_to_dma(struct dwc3_request *req);
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void dwc3_unmap_buffer_from_dma(struct dwc3_request *req);
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/**
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* dwc3_gadget_ep_get_transfer_index - Gets transfer index from HW
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