LXR linux/drivers/gpu/drm/nouveau/nvkm/core/firmware.c

   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
  25int
  26nvkm_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
  40int
  41nvkm_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 * @fw          firmware structure to load to
  64 *
  65 * Use this function to load firmware files in the form nvidia/chip/fwname.bin.
  66 * Firmware files released by NVIDIA will always follow this format.
  67 */
  68int
  69nvkm_firmware_get(const struct nvkm_subdev *subdev, const char *fwname, int ver,
  70                  const struct firmware **fw)
  71{
  72        struct nvkm_device *device = subdev->device;
  73        char f[64];
  74        char cname[16];
  75        int i;
  76
  77        /* Convert device name to lowercase */
  78        strncpy(cname, device->chip->name, sizeof(cname));
  79        cname[sizeof(cname) - 1] = '\0';
  80        i = strlen(cname);
  81        while (i) {
  82                --i;
  83                cname[i] = tolower(cname[i]);
  84        }
  85
  86        if (ver != 0)
  87                snprintf(f, sizeof(f), "nvidia/%s/%s-%d.bin", cname, fwname, ver);
  88        else
  89                snprintf(f, sizeof(f), "nvidia/%s/%s.bin", cname, fwname);
  90
  91        if (!firmware_request_nowarn(fw, f, device->dev)) {
  92                nvkm_debug(subdev, "firmware \"%s\" loaded - %zu byte(s)\n",
  93                           f, (*fw)->size);
  94                return 0;
  95        }
  96
  97        nvkm_debug(subdev, "firmware \"%s\" unavailable\n", f);
  98        return -ENOENT;
  99}
 100
 101/**
 102 * nvkm_firmware_put - release firmware loaded with nvkm_firmware_get
 103 */
 104void
 105nvkm_firmware_put(const struct firmware *fw)
 106{
 107        release_firmware(fw);
 108}
 109