1 /*
2 * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20 * DEALINGS IN THE SOFTWARE.
21 */
22 #include <core/device.h>
23 #include <core/firmware.h>
24
25 int
nvkm_firmware_load_name(const struct nvkm_subdev * subdev,const char * base,const char * name,int ver,const struct firmware ** pfw)26 nvkm_firmware_load_name(const struct nvkm_subdev *subdev, const char *base,
27 const char *name, int ver, const struct firmware **pfw)
28 {
29 char path[64];
30 int ret;
31
32 snprintf(path, sizeof(path), "%s%s", base, name);
33 ret = nvkm_firmware_get(subdev, path, ver, pfw);
34 if (ret < 0)
35 return ret;
36
37 return 0;
38 }
39
40 int
nvkm_firmware_load_blob(const struct nvkm_subdev * subdev,const char * base,const char * name,int ver,struct nvkm_blob * blob)41 nvkm_firmware_load_blob(const struct nvkm_subdev *subdev, const char *base,
42 const char *name, int ver, struct nvkm_blob *blob)
43 {
44 const struct firmware *fw;
45 int ret;
46
47 ret = nvkm_firmware_load_name(subdev, base, name, ver, &fw);
48 if (ret == 0) {
49 blob->data = kmemdup(fw->data, fw->size, GFP_KERNEL);
50 blob->size = fw->size;
51 nvkm_firmware_put(fw);
52 if (!blob->data)
53 return -ENOMEM;
54 }
55
56 return ret;
57 }
58
59 /**
60 * nvkm_firmware_get - load firmware from the official nvidia/chip/ directory
61 * @subdev: subdevice that will use that firmware
62 * @fwname: name of firmware file to load
63 * @ver: firmware version to load
64 * @fw: firmware structure to load to
65 *
66 * Use this function to load firmware files in the form nvidia/chip/fwname.bin.
67 * Firmware files released by NVIDIA will always follow this format.
68 */
69 int
nvkm_firmware_get(const struct nvkm_subdev * subdev,const char * fwname,int ver,const struct firmware ** fw)70 nvkm_firmware_get(const struct nvkm_subdev *subdev, const char *fwname, int ver,
71 const struct firmware **fw)
72 {
73 struct nvkm_device *device = subdev->device;
74 char f[64];
75 char cname[16];
76 int i;
77
78 /* Convert device name to lowercase */
79 strncpy(cname, device->chip->name, sizeof(cname));
80 cname[sizeof(cname) - 1] = '\0';
81 i = strlen(cname);
82 while (i) {
83 --i;
84 cname[i] = tolower(cname[i]);
85 }
86
87 if (ver != 0)
88 snprintf(f, sizeof(f), "nvidia/%s/%s-%d.bin", cname, fwname, ver);
89 else
90 snprintf(f, sizeof(f), "nvidia/%s/%s.bin", cname, fwname);
91
92 if (!firmware_request_nowarn(fw, f, device->dev)) {
93 nvkm_debug(subdev, "firmware \"%s\" loaded - %zu byte(s)\n",
94 f, (*fw)->size);
95 return 0;
96 }
97
98 nvkm_debug(subdev, "firmware \"%s\" unavailable\n", f);
99 return -ENOENT;
100 }
101
102 /*
103 * nvkm_firmware_put - release firmware loaded with nvkm_firmware_get
104 */
105 void
nvkm_firmware_put(const struct firmware * fw)106 nvkm_firmware_put(const struct firmware *fw)
107 {
108 release_firmware(fw);
109 }
110