diff options
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c index 6701f17a4db6..246070938c41 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c @@ -203,6 +203,29 @@ static int hw_id_map[MAX_HWIP] = { [PCIE_HWIP] = PCIE_HWID, }; +static int amdgpu_discovery_read_binary_from_sysmem(struct amdgpu_device *adev, uint8_t *binary) +{ + u64 tmr_offset, tmr_size, pos; + void *discv_regn; + int ret; + + ret = amdgpu_acpi_get_tmr_info(adev, &tmr_offset, &tmr_size); + if (ret) + return ret; + + pos = tmr_offset + tmr_size - DISCOVERY_TMR_OFFSET; + + /* This region is read-only and reserved from system use */ + discv_regn = memremap(pos, adev->mman.discovery_tmr_size, MEMREMAP_WC); + if (discv_regn) { + memcpy(binary, discv_regn, adev->mman.discovery_tmr_size); + memunmap(discv_regn); + return 0; + } + + return -ENOENT; +} + static void amdgpu_discovery_read_binary_from_vram(struct amdgpu_device *adev, uint8_t *binary) { uint64_t vram_size = (uint64_t)RREG32(mmRCC_CONFIG_MEMSIZE) << 20; |