diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c new file mode 100644 index 000000000..19188683c --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c @@ -0,0 +1,242 @@ +/* + * Copyright 2014 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Ben Skeggs <bskeggs@redhat.com> + */ +#include "priv.h" + +#include <core/option.h> +#include <subdev/bios.h> +#include <subdev/bios/image.h> + +struct shadow { + u32 skip; + const struct nvbios_source *func; + void *data; + u32 size; + int score; +}; + +static bool +shadow_fetch(struct nvkm_bios *bios, struct shadow *mthd, u32 upto) +{ + const u32 limit = (upto + 3) & ~3; + const u32 start = bios->size; + void *data = mthd->data; + if (nvbios_extend(bios, limit) > 0) { + u32 read = mthd->func->read(data, start, limit - start, bios); + bios->size = start + read; + } + return bios->size >= upto; +} + +static int +shadow_image(struct nvkm_bios *bios, int idx, u32 offset, struct shadow *mthd) +{ + struct nvkm_subdev *subdev = &bios->subdev; + struct nvbios_image image; + int score = 1; + + if (mthd->func->no_pcir) { + image.base = 0; + image.type = 0; + image.size = mthd->func->size(mthd->data); + image.last = 1; + } else { + if (!shadow_fetch(bios, mthd, offset + 0x1000)) { + nvkm_debug(subdev, "%08x: header fetch failed\n", + offset); + return 0; + } + + if (!nvbios_image(bios, idx, &image)) { + nvkm_debug(subdev, "image %d invalid\n", idx); + return 0; + } + } + nvkm_debug(subdev, "%08x: type %02x, %d bytes\n", + image.base, image.type, image.size); + + if (!shadow_fetch(bios, mthd, image.base + image.size)) { + nvkm_debug(subdev, "%08x: fetch failed\n", image.base); + return 0; + } + + switch (image.type) { + case 0x00: + if (!mthd->func->ignore_checksum && + nvbios_checksum(&bios->data[image.base], image.size)) { + nvkm_debug(subdev, "%08x: checksum failed\n", + image.base); + if (!mthd->func->require_checksum) { + if (mthd->func->rw) + score += 1; + score += 1; + } else + return 0; + } else { + score += 3; + } + break; + default: + score += 3; + break; + } + + if (!image.last) + score += shadow_image(bios, idx + 1, offset + image.size, mthd); + return score; +} + +static int +shadow_method(struct nvkm_bios *bios, struct shadow *mthd, const char *name) +{ + const struct nvbios_source *func = mthd->func; + struct nvkm_subdev *subdev = &bios->subdev; + if (func->name) { + nvkm_debug(subdev, "trying %s...\n", name ? name : func->name); + if (func->init) { + mthd->data = func->init(bios, name); + if (IS_ERR(mthd->data)) { + mthd->data = NULL; + return 0; + } + } + mthd->score = shadow_image(bios, 0, 0, mthd); + if (func->fini) + func->fini(mthd->data); + nvkm_debug(subdev, "scored %d\n", mthd->score); + mthd->data = bios->data; + mthd->size = bios->size; + bios->data = NULL; + bios->size = 0; + } + return mthd->score; +} + +static u32 +shadow_fw_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios) +{ + const struct firmware *fw = data; + if (offset + length <= fw->size) { + memcpy(bios->data + offset, fw->data + offset, length); + return length; + } + return 0; +} + +static void * +shadow_fw_init(struct nvkm_bios *bios, const char *name) +{ + struct device *dev = bios->subdev.device->dev; + const struct firmware *fw; + int ret = request_firmware(&fw, name, dev); + if (ret) + return ERR_PTR(-ENOENT); + return (void *)fw; +} + +static const struct nvbios_source +shadow_fw = { + .name = "firmware", + .init = shadow_fw_init, + .fini = (void(*)(void *))release_firmware, + .read = shadow_fw_read, + .rw = false, +}; + +int +nvbios_shadow(struct nvkm_bios *bios) +{ + struct nvkm_subdev *subdev = &bios->subdev; + struct nvkm_device *device = subdev->device; + struct shadow mthds[] = { + { 0, &nvbios_of }, + { 0, &nvbios_ramin }, + { 0, &nvbios_prom }, + { 0, &nvbios_acpi_fast }, + { 4, &nvbios_acpi_slow }, + { 1, &nvbios_pcirom }, + { 1, &nvbios_platform }, + {} + }, *mthd, *best = NULL; + const char *optarg; + char *source; + int optlen; + + /* handle user-specified bios source */ + optarg = nvkm_stropt(device->cfgopt, "NvBios", &optlen); + source = optarg ? kstrndup(optarg, optlen, GFP_KERNEL) : NULL; + if (source) { + /* try to match one of the built-in methods */ + for (mthd = mthds; mthd->func; mthd++) { + if (mthd->func->name && + !strcasecmp(source, mthd->func->name)) { + best = mthd; + if (shadow_method(bios, mthd, NULL)) + break; + } + } + + /* otherwise, attempt to load as firmware */ + if (!best && (best = mthd)) { + mthd->func = &shadow_fw; + shadow_method(bios, mthd, source); + mthd->func = NULL; + } + + if (!best->score) { + nvkm_error(subdev, "%s invalid\n", source); + kfree(source); + source = NULL; + } + } + + /* scan all potential bios sources, looking for best image */ + if (!best || !best->score) { + for (mthd = mthds, best = mthd; mthd->func; mthd++) { + if (!mthd->skip || best->score < mthd->skip) { + if (shadow_method(bios, mthd, NULL)) { + if (mthd->score > best->score) + best = mthd; + } + } + } + } + + /* cleanup the ones we didn't use */ + for (mthd = mthds; mthd->func; mthd++) { + if (mthd != best) + kfree(mthd->data); + } + + if (!best->score) { + nvkm_error(subdev, "unable to locate usable image\n"); + return -EINVAL; + } + + nvkm_debug(subdev, "using image from %s\n", best->func ? + best->func->name : source); + bios->data = best->data; + bios->size = best->size; + kfree(source); + return 0; +} |