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path: root/drivers/gpu/drm/nouveau/core/subdev/bios/shadow.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/core/subdev/bios/shadow.c')
-rw-r--r--drivers/gpu/drm/nouveau/core/subdev/bios/shadow.c270
1 files changed, 0 insertions, 270 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/bios/shadow.c b/drivers/gpu/drm/nouveau/core/subdev/bios/shadow.c
deleted file mode 100644
index bb9e0018d936..000000000000
--- a/drivers/gpu/drm/nouveau/core/subdev/bios/shadow.c
+++ /dev/null
@@ -1,270 +0,0 @@
-/*
- * 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/image.h>
-
-struct shadow {
- struct nouveau_oclass base;
- u32 skip;
- const struct nvbios_source *func;
- void *data;
- u32 size;
- int score;
-};
-
-static bool
-shadow_fetch(struct nouveau_bios *bios, u32 upto)
-{
- struct shadow *mthd = (void *)nv_object(bios)->oclass;
- 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 >= limit;
-}
-
-static u8
-shadow_rd08(struct nouveau_object *object, u64 addr)
-{
- struct nouveau_bios *bios = (void *)object;
- if (shadow_fetch(bios, addr + 1))
- return bios->data[addr];
- return 0x00;
-}
-
-static u16
-shadow_rd16(struct nouveau_object *object, u64 addr)
-{
- struct nouveau_bios *bios = (void *)object;
- if (shadow_fetch(bios, addr + 2))
- return get_unaligned_le16(&bios->data[addr]);
- return 0x0000;
-}
-
-static u32
-shadow_rd32(struct nouveau_object *object, u64 addr)
-{
- struct nouveau_bios *bios = (void *)object;
- if (shadow_fetch(bios, addr + 4))
- return get_unaligned_le32(&bios->data[addr]);
- return 0x00000000;
-}
-
-static struct nouveau_oclass
-shadow_class = {
- .handle = NV_SUBDEV(VBIOS, 0x00),
- .ofuncs = &(struct nouveau_ofuncs) {
- .rd08 = shadow_rd08,
- .rd16 = shadow_rd16,
- .rd32 = shadow_rd32,
- },
-};
-
-static int
-shadow_image(struct nouveau_bios *bios, int idx, struct shadow *mthd)
-{
- struct nvbios_image image;
- int score = 1;
-
- if (!nvbios_image(bios, idx, &image)) {
- nv_debug(bios, "image %d invalid\n", idx);
- return 0;
- }
- nv_debug(bios, "%08x: type %02x, %d bytes\n",
- image.base, image.type, image.size);
-
- if (!shadow_fetch(bios, image.size)) {
- nv_debug(bios, "%08x: fetch failed\n", image.base);
- return 0;
- }
-
- switch (image.type) {
- case 0x00:
- if (nvbios_checksum(&bios->data[image.base], image.size)) {
- nv_debug(bios, "%08x: checksum failed\n", image.base);
- if (mthd->func->rw)
- score += 1;
- score += 1;
- } else {
- score += 3;
- }
- break;
- default:
- score += 3;
- break;
- }
-
- if (!image.last)
- score += shadow_image(bios, idx + 1, mthd);
- return score;
-}
-
-static int
-shadow_score(struct nouveau_bios *bios, struct shadow *mthd)
-{
- struct nouveau_oclass *oclass = nv_object(bios)->oclass;
- int score;
- nv_object(bios)->oclass = &mthd->base;
- score = shadow_image(bios, 0, mthd);
- nv_object(bios)->oclass = oclass;
- return score;
-
-}
-
-static int
-shadow_method(struct nouveau_bios *bios, struct shadow *mthd, const char *name)
-{
- const struct nvbios_source *func = mthd->func;
- if (func->name) {
- nv_debug(bios, "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_score(bios, mthd);
- if (func->fini)
- func->fini(mthd->data);
- nv_debug(bios, "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 nouveau_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 nouveau_bios *bios, const char *name)
-{
- struct device *dev = &nv_device(bios)->pdev->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 nouveau_bios *bios)
-{
- struct shadow mthds[] = {
- { shadow_class, 0, &nvbios_of },
- { shadow_class, 0, &nvbios_ramin },
- { shadow_class, 0, &nvbios_rom },
- { shadow_class, 0, &nvbios_acpi_fast },
- { shadow_class, 4, &nvbios_acpi_slow },
- { shadow_class, 1, &nvbios_pcirom },
- { shadow_class, 1, &nvbios_platform },
- { shadow_class }
- }, *mthd = mthds, *best = NULL;
- const char *optarg;
- char *source;
- int optlen;
-
- /* handle user-specified bios source */
- optarg = nouveau_stropt(nv_device(bios)->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) {
- nv_error(bios, "%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) {
- nv_fatal(bios, "unable to locate usable image\n");
- return -EINVAL;
- }
-
- nv_info(bios, "using image from %s\n", best->func ?
- best->func->name : source);
- bios->data = best->data;
- bios->size = best->size;
- kfree(source);
- return 0;
-}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.