Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756917Ab0LRBuJ (ORCPT ); Fri, 17 Dec 2010 20:50:09 -0500 Received: from hqemgate03.nvidia.com ([216.228.121.140]:14650 "EHLO hqemgate03.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756779Ab0LRBuG (ORCPT ); Fri, 17 Dec 2010 20:50:06 -0500 X-PGP-Universal: processed; by hqnvupgp03.nvidia.com on Fri, 17 Dec 2010 17:49:49 -0800 From: Robert Morell To: David Brownell , Greg Kroah-Hartman , Benoit Goby , Alan Stern , Sarah Sharp , Matthew Wilcox , Ming Lei , Jacob Pan Cc: Olof Johansson , Erik Gilling , Colin Cross , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org, Robert Morell Subject: [PATCH v2 1/2] USB: Add driver hooks for (un)?map_urb_for_dma Date: Fri, 17 Dec 2010 17:49:30 -0800 Message-Id: <1292636971-17701-2-git-send-email-rmorell@nvidia.com> X-Mailer: git-send-email 1.7.2.2 In-Reply-To: <1292623129-26361-1-git-send-email-rmorell@nvidia.com> References: <1292623129-26361-1-git-send-email-rmorell@nvidia.com> X-NVConfidentiality: public Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3187 Lines: 89 These are useful in case your device has quirks involving what memory is and is not DMAable. Signed-off-by: Robert Morell Reviewed-by: Scott Williams Reviewed-by: Janne Hellsten --- drivers/usb/core/hcd.c | 19 ++++++++++++++++++- include/linux/usb/hcd.h | 8 ++++++++ 2 files changed, 26 insertions(+), 1 deletions(-) diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 5cca00a..84fee0f 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -1265,6 +1265,14 @@ static void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle, static void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) { + if (hcd->driver->unmap_urb_for_dma) + hcd->driver->unmap_urb_for_dma(hcd, urb); + else + usb_hcd_unmap_urb_for_dma(hcd, urb); +} + +void usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) +{ enum dma_data_direction dir; if (urb->transfer_flags & URB_SETUP_MAP_SINGLE) @@ -1311,6 +1319,15 @@ static void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags) { + if (hcd->driver->map_urb_for_dma) + return hcd->driver->map_urb_for_dma(hcd, urb, mem_flags); + else + return usb_hcd_map_urb_for_dma(hcd, urb, mem_flags); +} + +int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, + gfp_t mem_flags) +{ enum dma_data_direction dir; int ret = 0; @@ -1400,7 +1417,7 @@ static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, } if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL))) - unmap_urb_for_dma(hcd, urb); + usb_hcd_unmap_urb_for_dma(hcd, urb); } return ret; } diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h index 3b571f1..8aaf687 100644 --- a/include/linux/usb/hcd.h +++ b/include/linux/usb/hcd.h @@ -233,6 +233,11 @@ struct hc_driver { int (*urb_dequeue)(struct usb_hcd *hcd, struct urb *urb, int status); + /* dma support */ + int (*map_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb, + gfp_t mem_flags); + void (*unmap_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb); + /* hw synch, freeing endpoint resources that urb_dequeue can't */ void (*endpoint_disable)(struct usb_hcd *hcd, struct usb_host_endpoint *ep); @@ -327,6 +332,9 @@ extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb); extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags); extern int usb_hcd_unlink_urb(struct urb *urb, int status); +extern int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, + gfp_t mem_flags); +extern void usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb); extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status); extern void usb_hcd_flush_endpoint(struct usb_device *udev, -- 1.7.2.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/