Current Path : /sys/dev/usb/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/dev/usb/usb_mbuf.h |
/* $FreeBSD: release/9.1.0/sys/dev/usb/usb_mbuf.h 196219 2009-08-14 20:03:53Z jhb $ */ /*- * 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_ */