diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/base.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bios/base.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/base.c new file mode 100644 index 000000000..6c318e41b --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/base.c @@ -0,0 +1,205 @@ +/* + * Copyright 2012 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 + */ +#include "priv.h" + +#include <subdev/bios.h> +#include <subdev/bios/bmp.h> +#include <subdev/bios/bit.h> +#include <subdev/bios/image.h> + +static bool +nvbios_addr(struct nvkm_bios *bios, u32 *addr, u8 size) +{ + u32 p = *addr; + + if (*addr >= bios->image0_size && bios->imaged_addr) { + *addr -= bios->image0_size; + *addr += bios->imaged_addr; + } + + if (unlikely(*addr + size > bios->size)) { + nvkm_error(&bios->subdev, "OOB %d %08x %08x\n", size, p, *addr); + return false; + } + + return true; +} + +u8 +nvbios_rd08(struct nvkm_bios *bios, u32 addr) +{ + if (likely(nvbios_addr(bios, &addr, 1))) + return bios->data[addr]; + return 0x00; +} + +u16 +nvbios_rd16(struct nvkm_bios *bios, u32 addr) +{ + if (likely(nvbios_addr(bios, &addr, 2))) + return get_unaligned_le16(&bios->data[addr]); + return 0x0000; +} + +u32 +nvbios_rd32(struct nvkm_bios *bios, u32 addr) +{ + if (likely(nvbios_addr(bios, &addr, 4))) + return get_unaligned_le32(&bios->data[addr]); + return 0x00000000; +} + +u8 +nvbios_checksum(const u8 *data, int size) +{ + u8 sum = 0; + while (size--) + sum += *data++; + return sum; +} + +u16 +nvbios_findstr(const u8 *data, int size, const char *str, int len) +{ + int i, j; + + for (i = 0; i <= (size - len); i++) { + for (j = 0; j < len; j++) + if ((char)data[i + j] != str[j]) + break; + if (j == len) + return i; + } + + return 0; +} + +int +nvbios_memcmp(struct nvkm_bios *bios, u32 addr, const char *str, u32 len) +{ + unsigned char c1, c2; + + while (len--) { + c1 = nvbios_rd08(bios, addr++); + c2 = *(str++); + if (c1 != c2) + return c1 - c2; + } + return 0; +} + +int +nvbios_extend(struct nvkm_bios *bios, u32 length) +{ + if (bios->size < length) { + u8 *prev = bios->data; + if (!(bios->data = kmalloc(length, GFP_KERNEL))) { + bios->data = prev; + return -ENOMEM; + } + memcpy(bios->data, prev, bios->size); + bios->size = length; + kfree(prev); + return 1; + } + return 0; +} + +static void * +nvkm_bios_dtor(struct nvkm_subdev *subdev) +{ + struct nvkm_bios *bios = nvkm_bios(subdev); + kfree(bios->data); + return bios; +} + +static const struct nvkm_subdev_func +nvkm_bios = { + .dtor = nvkm_bios_dtor, +}; + +int +nvkm_bios_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, + struct nvkm_bios **pbios) +{ + struct nvkm_bios *bios; + struct nvbios_image image; + struct bit_entry bit_i; + int ret, idx = 0; + + if (!(bios = *pbios = kzalloc(sizeof(*bios), GFP_KERNEL))) + return -ENOMEM; + nvkm_subdev_ctor(&nvkm_bios, device, type, inst, &bios->subdev); + + ret = nvbios_shadow(bios); + if (ret) + return ret; + + /* Some tables have weird pointers that need adjustment before + * they're dereferenced. I'm not entirely sure why... + */ + if (nvbios_image(bios, idx++, &image)) { + bios->image0_size = image.size; + while (nvbios_image(bios, idx++, &image)) { + if (image.type == 0xe0) { + bios->imaged_addr = image.base; + break; + } + } + } + + /* detect type of vbios we're dealing with */ + bios->bmp_offset = nvbios_findstr(bios->data, bios->size, + "\xff\x7f""NV\0", 5); + if (bios->bmp_offset) { + nvkm_debug(&bios->subdev, "BMP version %x.%x\n", + bmp_version(bios) >> 8, + bmp_version(bios) & 0xff); + } + + bios->bit_offset = nvbios_findstr(bios->data, bios->size, + "\xff\xb8""BIT", 5); + if (bios->bit_offset) + nvkm_debug(&bios->subdev, "BIT signature found\n"); + + /* determine the vbios version number */ + if (!bit_entry(bios, 'i', &bit_i) && bit_i.length >= 4) { + bios->version.major = nvbios_rd08(bios, bit_i.offset + 3); + bios->version.chip = nvbios_rd08(bios, bit_i.offset + 2); + bios->version.minor = nvbios_rd08(bios, bit_i.offset + 1); + bios->version.micro = nvbios_rd08(bios, bit_i.offset + 0); + bios->version.patch = nvbios_rd08(bios, bit_i.offset + 4); + } else + if (bmp_version(bios)) { + bios->version.major = nvbios_rd08(bios, bios->bmp_offset + 13); + bios->version.chip = nvbios_rd08(bios, bios->bmp_offset + 12); + bios->version.minor = nvbios_rd08(bios, bios->bmp_offset + 11); + bios->version.micro = nvbios_rd08(bios, bios->bmp_offset + 10); + } + + nvkm_info(&bios->subdev, "version %02x.%02x.%02x.%02x.%02x\n", + bios->version.major, bios->version.chip, + bios->version.minor, bios->version.micro, bios->version.patch); + return 0; +} |