1 files changed, 102 insertions, 0 deletions
diff --git a/sys/dev/usb/usb_mbuf.h b/sys/dev/usb/usb_mbuf.h
new file mode 100644
index 000000000000..109340cbfefc
--- /dev/null
+++ b/sys/dev/usb/usb_mbuf.h
@@ -0,0 +1,102 @@
+/* $FreeBSD$ */
+/*-
+ * 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 _USB2_MBUF_H_
+#define	_USB2_MBUF_H_
+
+/*
+ * The following structure defines a minimum re-implementation of the
+ * mbuf system in the kernel.
+ */
+struct usb2_mbuf {
+	uint8_t *cur_data_ptr;
+	uint8_t *min_data_ptr;
+	struct usb2_mbuf *usb2_nextpkt;
+	struct usb2_mbuf *usb2_next;
+
+	uint32_t cur_data_len;
+	uint32_t max_data_len;
+	uint8_t last_packet:1;
+	uint8_t unused:7;
+};
+
+/*
+ * The following structure defines a minimum re-implementation of the
+ * ifqueue structure in the kernel.
+ */
+struct usb2_ifqueue {
+	struct usb2_mbuf *ifq_head;
+	struct usb2_mbuf *ifq_tail;
+
+	uint32_t ifq_len;
+	uint32_t ifq_maxlen;
+};
+
+#define	USB_IF_ENQUEUE(ifq, m) do {		\
+    (m)->usb2_nextpkt = NULL;			\
+    if ((ifq)->ifq_tail == NULL)		\
+        (ifq)->ifq_head = (m);			\
+    else					\
+        (ifq)->ifq_tail->usb2_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)->usb2_nextpkt) == NULL) {	\
+	     (ifq)->ifq_tail = NULL;				\
+	}							\
+	(m)->usb2_nextpkt = NULL;				\
+	(ifq)->ifq_len--;					\
+    }								\
+  } while (0)
+
+#define	USB_IF_PREPEND(ifq, m) do {		\
+      (m)->usb2_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   *usb2_alloc_mbufs(struct malloc_type *type, struct usb2_ifqueue *ifq,
+	    uint32_t block_size, uint16_t nblocks);
+
+#endif					/* _USB2_MBUF_H_ */