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 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 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 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 106 nvkm_firmware_put(const struct firmware *fw) 107 { 108 release_firmware(fw); 109 } 110