diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c index 2a8588762c1d..2c3477627679 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c @@ -158,6 +158,39 @@ void amdgpu_gmc_vram_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc, mc->vram_end, mc->real_vram_size >> 20); } +/** amdgpu_gmc_sysvm_location - place vram and gart in sysvm aperture + * + * @adev: amdgpu device structure holding all necessary information + * @mc: memory controller structure holding memory information + * + * This function is only used if use GART for FB translation. In such + * case, we use sysvm aperture (vmid0 page tables) for both vram + * and gart (aka system memory) access. + * + * GPUVM (and our organization of vmid0 page tables) require sysvm + * aperture to be placed at a location aligned with 8 times of native + * page size. For example, if vm_context0_cntl.page_table_block_size + * is 12, then native page size is 8G (2M*2^12), sysvm should start + * with a 64G aligned address. For simplicity, we just put sysvm at + * address 0. So vram start at address 0 and gart is right after vram. + */ +void amdgpu_gmc_sysvm_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc) +{ + u64 hive_vram_start = 0; + u64 hive_vram_end = mc->xgmi.node_segment_size * mc->xgmi.num_physical_nodes - 1; + mc->vram_start = mc->xgmi.node_segment_size * mc->xgmi.physical_node_id; + mc->vram_end = mc->vram_start + mc->xgmi.node_segment_size - 1; + mc->gart_start = hive_vram_end + 1; + mc->gart_end = mc->gart_start + mc->gart_size - 1; + mc->fb_start = hive_vram_start; + mc->fb_end = hive_vram_end; + dev_info(adev->dev, "VRAM: %lluM 0x%016llX - 0x%016llX (%lluM used)\n", + mc->mc_vram_size >> 20, mc->vram_start, + mc->vram_end, mc->real_vram_size >> 20); + dev_info(adev->dev, "GART: %lluM 0x%016llX - 0x%016llX\n", + mc->gart_size >> 20, mc->gart_start, mc->gart_end); +} + /** * amdgpu_gmc_gart_location - try to find GART location * @@ -165,7 +198,6 @@ void amdgpu_gmc_vram_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc, * @mc: memory controller structure holding memory information * * Function will place try to place GART before or after VRAM. - * * If GART size is bigger than space left then we ajust GART size. * Thus function will never fails. */ |