2 * Copyright (c) 2005 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Johannes Hofmann <Hoannes.Hofmann.gmx.de> and
6 * Joerg Sonnenberger <joerg@bec.de>.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of The DragonFly Project nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific, prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
30 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * $DragonFly: src/sys/kern/kern_firmware.c,v 1.2 2005/03/24 17:24:04 joerg Exp $
36 #include <sys/param.h>
37 #include <sys/fcntl.h>
39 #include <sys/firmware.h>
40 #include <sys/kernel.h>
41 #include <sys/malloc.h>
43 #include <sys/systm.h>
44 #include <machine/limits.h>
46 static TAILQ_HEAD(, fw_image) images;
48 static struct fw_image *firmware_image_load_file(const char *);
49 static struct fw_image *firmware_prepare_image(const char *, size_t);
50 static void firmware_destroy_image(struct fw_image *);
53 firmware_image_load(const char *image_name)
57 TAILQ_FOREACH(img, &images, fw_link) {
58 if (strcmp(img->fw_name, image_name) == 0) {
64 if ((img = firmware_image_load_file(image_name)) != NULL)
71 firmware_image_unload(struct fw_image *img)
73 KKASSERT(img->fw_refcnt > 0);
74 if (--img->fw_refcnt > 0)
77 TAILQ_REMOVE(&images, img, fw_link);
78 firmware_destroy_image(img);
82 firmware_destroy_image(struct fw_image *img)
84 bus_dmamap_unload(img->fw_dma_tag, img->fw_dma_map);
85 bus_dmamem_free(img->fw_dma_tag, img->fw_image, img->fw_dma_map);
86 bus_dma_tag_destroy(img->fw_dma_tag);
87 free(__DECONST(char *, img->fw_name), M_DEVBUF);
92 firmware_dma_map(void *arg, bus_dma_segment_t *segs, int nseg, int error)
102 static struct fw_image *
103 firmware_prepare_image(const char *imgname, size_t imglen)
105 struct fw_image *img;
108 img = malloc(sizeof(*img), M_DEVBUF, M_WAITOK | M_ZERO);
109 img->fw_name = strdup(imgname, M_DEVBUF); /* XXX necessary? */
111 img->fw_imglen = imglen;
113 error = bus_dma_tag_create(NULL, 1, 0,
114 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
115 img->fw_imglen, 1, BUS_SPACE_MAXSIZE_32BIT, BUS_DMA_ALLOCNOW,
118 goto fail_tag_create;
120 error = bus_dmamem_alloc(img->fw_dma_tag, (void **)&img->fw_image,
121 BUS_DMA_WAITOK, &img->fw_dma_map);
125 error = bus_dmamap_load(img->fw_dma_tag, img->fw_dma_map,
126 img->fw_image, img->fw_imglen,
127 firmware_dma_map, &img->fw_dma_addr, 0);
134 bus_dmamem_free(img->fw_dma_tag, img->fw_image, img->fw_dma_map);
136 bus_dma_tag_destroy(img->fw_dma_tag);
138 free(__DECONST(char *, img->fw_name), M_DEVBUF);
143 static char firmware_root[MAXPATHLEN] = "/etc/firmware/";
145 static struct fw_image *
146 firmware_image_load_file(const char *image_name)
150 struct fw_image *img;
155 fw_path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
156 snprintf(fw_path, MAXPATHLEN, "%s/%s", firmware_root, image_name);
160 error = fp_open(fw_path, O_RDONLY|O_NOFOLLOW, 0600, &fp);
164 if (fp_stat(fp, &ub) != 0) {
166 printf("fp_stat on firmware image %s failed: %d\n",
170 if (ub.st_size > SIZE_T_MAX) {
171 printf("firmware image %s is too large\n", fw_path);
176 img = firmware_prepare_image(image_name, (size_t)ub.st_size);
180 if ((error = fp_read(fp, img->fw_image, img->fw_imglen, &nread)) != 0 ||
181 nread != img->fw_imglen) {
182 printf("firmware image could not be read: %d\n", error);
186 TAILQ_INSERT_HEAD(&images, img, fw_link);
191 firmware_destroy_image(img);
195 free(fw_path, M_TEMP);