cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

firmware.c (3277B)

      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 * @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 */
     69int
     70nvkm_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 */
    105void
    106nvkm_firmware_put(const struct firmware *fw)
    107{
    108	release_firmware(fw);
    109}