diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/usb.h | 1 | ||||
| -rw-r--r-- | include/linux/usb/hcd.h | 15 |
2 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/usb.h b/include/linux/usb.h index bd69b65f3356..e63efeb378e3 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -976,6 +976,7 @@ extern int usb_disabled(void); #define URB_SETUP_MAP_SINGLE 0x00100000 /* Setup packet DMA mapped */ #define URB_SETUP_MAP_LOCAL 0x00200000 /* HCD-local setup packet */ #define URB_DMA_SG_COMBINED 0x00400000 /* S-G entries were combined */ +#define URB_ALIGNED_TEMP_BUFFER 0x00800000 /* Temp buffer was alloc'd */ struct usb_iso_packet_descriptor { unsigned int offset; diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h index 395704bdf5cc..92b96fe39307 100644 --- a/include/linux/usb/hcd.h +++ b/include/linux/usb/hcd.h @@ -233,6 +233,19 @@ struct hc_driver { int (*urb_dequeue)(struct usb_hcd *hcd, struct urb *urb, int status); + /* + * (optional) these hooks allow an HCD to override the default DMA + * mapping and unmapping routines. In general, they shouldn't be + * necessary unless the host controller has special DMA requirements, + * such as alignment contraints. If these are not specified, the + * general usb_hcd_(un)?map_urb_for_dma functions will be used instead + * (and it may be a good idea to call these functions in your HCD + * implementation) + */ + 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); @@ -329,6 +342,8 @@ 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 void usb_hcd_giveback_urb(struct usb_hcd *hcd, 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_setup_for_dma(struct usb_hcd *, struct urb *); extern void usb_hcd_unmap_urb_for_dma(struct usb_hcd *, struct urb *); extern void usb_hcd_flush_endpoint(struct usb_device *udev, |