diff options
Diffstat (limited to 'src/include/ipxe')
| -rw-r--r-- | src/include/ipxe/usb.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/include/ipxe/usb.h b/src/include/ipxe/usb.h index 8e1824160..63358024d 100644 --- a/src/include/ipxe/usb.h +++ b/src/include/ipxe/usb.h @@ -379,6 +379,8 @@ struct usb_endpoint { int open; /** Current failure state (if any) */ int rc; + /** Buffer fill level */ + unsigned int fill; /** Host controller operations */ struct usb_endpoint_host_operations *host; @@ -386,6 +388,13 @@ struct usb_endpoint { void *priv; /** Driver operations */ struct usb_endpoint_driver_operations *driver; + + /** Recycled I/O buffer list */ + struct list_head recycled; + /** Refill buffer length */ + size_t len; + /** Maximum fill level */ + unsigned int max; }; /** USB endpoint host controller operations */ @@ -554,6 +563,37 @@ extern void usb_complete_err ( struct usb_endpoint *ep, struct io_buffer *iobuf, int rc ); /** + * Initialise USB endpoint refill + * + * @v ep USB endpoint + * @v len Refill buffer length (or zero to use 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 ) { + + INIT_LIST_HEAD ( &ep->recycled ); + ep->len = len; + ep->max = max; +} + +/** + * Recycle I/O buffer + * + * @v ep USB endpoint + * @v iobuf I/O buffer + */ +static inline __attribute__ (( always_inline )) void +usb_recycle ( struct usb_endpoint *ep, struct io_buffer *iobuf ) { + + list_add_tail ( &iobuf->list, &ep->recycled ); +} + +extern int usb_prefill ( struct usb_endpoint *ep ); +extern int usb_refill ( struct usb_endpoint *ep ); +extern void usb_flush ( struct usb_endpoint *ep ); + +/** * A USB function * * A USB function represents an association of interfaces within a USB |