diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c | 58 |
1 files changed, 50 insertions, 8 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c index c44c0c6afd1b..80add22375ee 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c @@ -35,6 +35,13 @@ * BIOS. */ +#define AMD_VBIOS_SIGNATURE " 761295520" +#define AMD_VBIOS_SIGNATURE_OFFSET 0x30 +#define AMD_VBIOS_SIGNATURE_SIZE sizeof(AMD_VBIOS_SIGNATURE) +#define AMD_VBIOS_SIGNATURE_END (AMD_VBIOS_SIGNATURE_OFFSET + AMD_VBIOS_SIGNATURE_SIZE) +#define AMD_IS_VALID_VBIOS(p) ((p)[0] == 0x55 && (p)[1] == 0xAA) +#define AMD_VBIOS_LENGTH(p) ((p)[2] << 9) + /* If you boot an IGP board with a discrete card as the primary, * the IGP rom is not accessible via the rom bar as the IGP rom is * part of the system bios. On boot, the system bios puts a @@ -58,7 +65,7 @@ static bool igp_read_bios_from_vram(struct amdgpu_device *adev) return false; } - if (size == 0 || bios[0] != 0x55 || bios[1] != 0xaa) { + if (size == 0 || !AMD_IS_VALID_VBIOS(bios)) { iounmap(bios); return false; } @@ -74,7 +81,7 @@ static bool igp_read_bios_from_vram(struct amdgpu_device *adev) bool amdgpu_read_bios(struct amdgpu_device *adev) { - uint8_t __iomem *bios, val1, val2; + uint8_t __iomem *bios, val[2]; size_t size; adev->bios = NULL; @@ -84,10 +91,10 @@ bool amdgpu_read_bios(struct amdgpu_device *adev) return false; } - val1 = readb(&bios[0]); - val2 = readb(&bios[1]); + val[0] = readb(&bios[0]); + val[1] = readb(&bios[1]); - if (size == 0 || val1 != 0x55 || val2 != 0xaa) { + if (size == 0 || !AMD_IS_VALID_VBIOS(val)) { pci_unmap_rom(adev->pdev, bios); return false; } @@ -101,6 +108,38 @@ bool amdgpu_read_bios(struct amdgpu_device *adev) return true; } +static bool amdgpu_read_bios_from_rom(struct amdgpu_device *adev) +{ + u8 header[AMD_VBIOS_SIGNATURE_END+1] = {0}; + int len; + + if (!adev->asic_funcs->read_bios_from_rom) + return false; + + /* validate VBIOS signature */ + if (amdgpu_asic_read_bios_from_rom(adev, &header[0], sizeof(header)) == false) + return false; + header[AMD_VBIOS_SIGNATURE_END] = 0; + + if ((!AMD_IS_VALID_VBIOS(header)) || + 0 != memcmp((char *)&header[AMD_VBIOS_SIGNATURE_OFFSET], + AMD_VBIOS_SIGNATURE, + strlen(AMD_VBIOS_SIGNATURE))) + return false; + + /* valid vbios, go on */ + len = AMD_VBIOS_LENGTH(header); + len = ALIGN(len, 4); + adev->bios = kmalloc(len, GFP_KERNEL); + if (!adev->bios) { + DRM_ERROR("no memory to allocate for BIOS\n"); + return false; + } + + /* read complete BIOS */ + return amdgpu_asic_read_bios_from_rom(adev, adev->bios, len); +} + static bool amdgpu_read_platform_bios(struct amdgpu_device *adev) { uint8_t __iomem *bios; @@ -113,7 +152,7 @@ static bool amdgpu_read_platform_bios(struct amdgpu_device *adev) return false; } - if (size == 0 || bios[0] != 0x55 || bios[1] != 0xaa) { + if (size == 0 || !AMD_IS_VALID_VBIOS(bios)) { return false; } adev->bios = kmemdup(bios, size, GFP_KERNEL); @@ -230,7 +269,7 @@ static bool amdgpu_atrm_get_bios(struct amdgpu_device *adev) break; } - if (i == 0 || adev->bios[0] != 0x55 || adev->bios[1] != 0xaa) { + if (i == 0 || !AMD_IS_VALID_VBIOS(adev->bios)) { kfree(adev->bios); return false; } @@ -320,6 +359,9 @@ bool amdgpu_get_bios(struct amdgpu_device *adev) if (r == false) r = amdgpu_read_bios(adev); if (r == false) { + r = amdgpu_read_bios_from_rom(adev); + } + if (r == false) { r = amdgpu_read_disabled_bios(adev); } if (r == false) { @@ -330,7 +372,7 @@ bool amdgpu_get_bios(struct amdgpu_device *adev) adev->bios = NULL; return false; } - if (adev->bios[0] != 0x55 || adev->bios[1] != 0xaa) { + if (!AMD_IS_VALID_VBIOS(adev->bios)) { printk("BIOS signature incorrect %x %x\n", adev->bios[0], adev->bios[1]); goto free_bios; } |