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[usb] Allow USB endpoints to specify a reserved header length for refills

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2016-01-19 00:01:11 +00:00
parent 8dc23d9b83
commit 71b83a6d00
11 changed files with 31 additions and 20 deletions
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11
src/include/ipxe/usb.h
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@@ -414,7 +414,9 @@ struct usb_endpoint {
/** Recycled I/O buffer list */
struct list_head recycled;
/** Refill buffer length */
/** Refill buffer reserved header length */
size_t reserve;
/** Refill buffer payload length */
size_t len;
/** Maximum fill level */
unsigned int max;
@@ -588,13 +590,16 @@ extern void usb_complete_err ( struct usb_endpoint *ep,
* Initialise USB endpoint refill
*
* @v ep USB endpoint
* @v len Refill buffer length (or zero to use endpoint's MTU)
* @v reserve Refill buffer reserved header length
* @v len Refill buffer payload length (zero for endpoint's MTU)
* @v max Maximum fill level
*/
static inline __attribute__ (( always_inline )) void
usb_refill_init ( struct usb_endpoint *ep, size_t len, unsigned int max ) {
usb_refill_init ( struct usb_endpoint *ep, size_t reserve, size_t len,
unsigned int max ) {
INIT_LIST_HEAD ( &ep->recycled );
ep->reserve = reserve;
ep->len = len;
ep->max = max;
}