From 0fc9a1be09d9f8b19bcf64ab96836cb92beb0970 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 19 Dec 2011 11:32:34 +0200 Subject: [PATCH] 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 --- drivers/usb/dwc3/core.h | 2 - drivers/usb/dwc3/ep0.c | 16 ++++++-- drivers/usb/dwc3/gadget.c | 93 +++++++++-------------------------------------- drivers/usb/dwc3/gadget.h | 2 - 4 files changed, 30 insertions(+), 83 deletions(-) diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 9e57f8e9bf17..a72f42ffbbee 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -572,7 +572,6 @@ struct dwc3_request { * @ctrl_req_addr: dma address of ctrl_req * @ep0_trb: dma address of ep0_trb * @ep0_usb_req: dummy req used while handling STD USB requests - * @setup_buf_addr: dma address of setup_buf * @ep0_bounce_addr: dma address of ep0_bounce * @lock: for synchronizing * @dev: pointer to our struct device @@ -609,7 +608,6 @@ struct dwc3 { u8 *setup_buf; dma_addr_t ctrl_req_addr; dma_addr_t ep0_trb_addr; - dma_addr_t setup_buf_addr; dma_addr_t ep0_bounce_addr; struct dwc3_request ep0_usb_req; /* device lock */ diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c index 2f51de57593a..24137d8563c9 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -309,7 +309,7 @@ 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.dma = dwc->setup_buf_addr; + dwc->ep0_usb_req.request.buf = dwc->setup_buf; dwc->ep0_usb_req.request.complete = dwc3_ep0_status_cmpl; return __dwc3_gadget_ep0_queue(dep, &dwc->ep0_usb_req); @@ -686,7 +686,12 @@ static void dwc3_ep0_do_control_data(struct dwc3 *dwc, DWC3_TRBCTL_CONTROL_DATA); } else if ((req->request.length % dep->endpoint.maxpacket) && (event->endpoint_number == 0)) { - dwc3_map_buffer_to_dma(req); + ret = usb_gadget_map_request(&dwc->gadget, &req->request, + event->endpoint_number); + if (ret) { + dev_dbg(dwc->dev, "failed to map request\n"); + return; + } WARN_ON(req->request.length > dep->endpoint.maxpacket); @@ -701,7 +706,12 @@ static void dwc3_ep0_do_control_data(struct dwc3 *dwc, dwc->ep0_bounce_addr, dep->endpoint.maxpacket, DWC3_TRBCTL_CONTROL_DATA); } else { - dwc3_map_buffer_to_dma(req); + ret = usb_gadget_map_request(&dwc->gadget, &req->request, + event->endpoint_number); + if (ret) { + dev_dbg(dwc->dev, "failed to map request\n"); + return; + } ret = dwc3_ep0_start_trans(dwc, event->endpoint_number, req->request.dma, req->request.length, diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index a1a04d00a9e4..1009e7e47a24 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) { @@ -144,14 +80,15 @@ 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, req->request.length, status); spin_unlock(&dwc->lock); - req->request.complete(&req->dep->endpoint, &req->request); + req->request.complete(&dep->endpoint, &req->request); spin_lock(&dwc->lock); } @@ -563,7 +500,6 @@ 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; } @@ -822,7 +758,8 @@ 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; } @@ -838,6 +775,9 @@ 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; @@ -855,7 +795,11 @@ 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); /* @@ -2150,9 +2094,8 @@ int __devinit dwc3_gadget_init(struct dwc3 *dwc) goto err1; } - dwc->setup_buf = dma_alloc_coherent(dwc->dev, - sizeof(*dwc->setup_buf) * 2, - &dwc->setup_buf_addr, GFP_KERNEL); + dwc->setup_buf = kzalloc(sizeof(*dwc->setup_buf) * 2, + GFP_KERNEL); if (!dwc->setup_buf) { dev_err(dwc->dev, "failed to allocate setup buffer\n"); ret = -ENOMEM; @@ -2243,8 +2186,7 @@ err4: dwc->ep0_bounce_addr); err3: - dma_free_coherent(dwc->dev, sizeof(*dwc->setup_buf) * 2, - dwc->setup_buf, dwc->setup_buf_addr); + kfree(dwc->setup_buf); err2: dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), @@ -2273,8 +2215,7 @@ void dwc3_gadget_exit(struct dwc3 *dwc) dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce, dwc->ep0_bounce_addr); - dma_free_coherent(dwc->dev, sizeof(*dwc->setup_buf) * 2, - dwc->setup_buf, dwc->setup_buf_addr); + kfree(dwc->setup_buf); dma_free_coherent(dwc->dev, sizeof(*dwc->ep0_trb), dwc->ep0_trb, dwc->ep0_trb_addr); diff --git a/drivers/usb/dwc3/gadget.h b/drivers/usb/dwc3/gadget.h index d97f467d41cc..12f1e104977f 100644 --- a/drivers/usb/dwc3/gadget.h +++ b/drivers/usb/dwc3/gadget.h @@ -108,8 +108,6 @@ int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request, int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value); int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep, unsigned cmd, struct dwc3_gadget_ep_cmd_params *params); -void dwc3_map_buffer_to_dma(struct dwc3_request *req); -void dwc3_unmap_buffer_from_dma(struct dwc3_request *req); /** * dwc3_gadget_ep_get_transfer_index - Gets transfer index from HW -- 2.11.0