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 1.8 2007/01/12 06:06:57 dillon 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 kfree(__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
= kmalloc(sizeof(*img
), M_DEVBUF
, M_WAITOK
| M_ZERO
);
109 img
->fw_name
= kstrdup(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 kfree(__DECONST(char *, img
->fw_name
), M_DEVBUF
);
139 kfree(img
, 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
= kmalloc(MAXPATHLEN
, M_TEMP
, M_WAITOK
);
156 ksnprintf(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 kprintf("fp_stat on firmware image %s failed: %d\n",
170 if (ub
.st_size
> SIZE_T_MAX
) {
171 kprintf("firmware image %s is too large\n", fw_path
);
176 img
= firmware_prepare_image(image_name
, (size_t)ub
.st_size
);
180 error
= fp_read(fp
, img
->fw_image
, img
->fw_imglen
, &nread
,
182 if (error
!= 0 || nread
!= img
->fw_imglen
) {
183 kprintf("firmware image could not be read: %d\n", error
);
187 TAILQ_INSERT_HEAD(&images
, img
, fw_link
);
192 firmware_destroy_image(img
);
196 kfree(fw_path
, M_TEMP
);