74c6c20b93
- Reduce the number of headers needed for a usb driver, the common case is just usb.h and usbdi.h
91 lines
3.0 KiB
C
91 lines
3.0 KiB
C
/* $FreeBSD$ */
|
|
/*-
|
|
* Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef _USB_MBUF_H_
|
|
#define _USB_MBUF_H_
|
|
|
|
/*
|
|
* The following structure defines a minimum re-implementation of the
|
|
* mbuf system in the kernel.
|
|
*/
|
|
struct usb_mbuf {
|
|
uint8_t *cur_data_ptr;
|
|
uint8_t *min_data_ptr;
|
|
struct usb_mbuf *usb_nextpkt;
|
|
struct usb_mbuf *usb_next;
|
|
|
|
usb_size_t cur_data_len;
|
|
usb_size_t max_data_len;
|
|
uint8_t last_packet:1;
|
|
uint8_t unused:7;
|
|
};
|
|
|
|
#define USB_IF_ENQUEUE(ifq, m) do { \
|
|
(m)->usb_nextpkt = NULL; \
|
|
if ((ifq)->ifq_tail == NULL) \
|
|
(ifq)->ifq_head = (m); \
|
|
else \
|
|
(ifq)->ifq_tail->usb_nextpkt = (m); \
|
|
(ifq)->ifq_tail = (m); \
|
|
(ifq)->ifq_len++; \
|
|
} while (0)
|
|
|
|
#define USB_IF_DEQUEUE(ifq, m) do { \
|
|
(m) = (ifq)->ifq_head; \
|
|
if (m) { \
|
|
if (((ifq)->ifq_head = (m)->usb_nextpkt) == NULL) { \
|
|
(ifq)->ifq_tail = NULL; \
|
|
} \
|
|
(m)->usb_nextpkt = NULL; \
|
|
(ifq)->ifq_len--; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define USB_IF_PREPEND(ifq, m) do { \
|
|
(m)->usb_nextpkt = (ifq)->ifq_head; \
|
|
if ((ifq)->ifq_tail == NULL) { \
|
|
(ifq)->ifq_tail = (m); \
|
|
} \
|
|
(ifq)->ifq_head = (m); \
|
|
(ifq)->ifq_len++; \
|
|
} while (0)
|
|
|
|
#define USB_IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
|
|
#define USB_IF_QLEN(ifq) ((ifq)->ifq_len)
|
|
#define USB_IF_POLL(ifq, m) ((m) = (ifq)->ifq_head)
|
|
|
|
#define USB_MBUF_RESET(m) do { \
|
|
(m)->cur_data_ptr = (m)->min_data_ptr; \
|
|
(m)->cur_data_len = (m)->max_data_len; \
|
|
(m)->last_packet = 0; \
|
|
} while (0)
|
|
|
|
/* prototypes */
|
|
void *usb_alloc_mbufs(struct malloc_type *type, struct usb_ifqueue *ifq,
|
|
usb_size_t block_size, uint16_t nblocks);
|
|
|
|
#endif /* _USB_MBUF_H_ */
|