2 * Copyright (c) 2004 The DragonFly Project.
5 * This code is derived from software contributed to The DragonFly Project
6 * by Matthew Dillon <dillon@backplane.com>.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
18 * 3. Neither the name of The DragonFly Project nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific, prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * $DragonFly: src/sys/dev/usbmisc/ugen/ugenbuf.c,v 1.3 2006/09/05 00:55:43 dillon Exp $
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/kernel.h>
41 #include <sys/malloc.h>
42 #include <sys/sysctl.h>
45 static MALLOC_DEFINE(M_UGENBUF, "ugenbufs", "Temporary buffer space");
46 static void *ugencache_buf;
47 static int ugencache_size;
52 * Allocate a temporary buffer for UGEN. This routine is called from
53 * mainline code only and the BGL is held.
56 getugenbuf(int reqsize, int *bsize)
68 buf = kmalloc(reqsize, M_UGENBUF, M_WAITOK);
69 } else if (ugencache_size != reqsize) {
71 kfree(buf, M_UGENBUF);
72 buf = kmalloc(reqsize, M_UGENBUF, M_WAITOK);
83 * Release a temporary buffer for UGEN. This routine is called from
84 * mainline code only and the BGL is held.
87 relugenbuf(void *buf, int bsize)
89 if (ugencache_buf == NULL) {
91 ugencache_size = bsize;
93 kfree(buf, M_UGENBUF);