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drm/amdgpu: put GART away from VRAM v2

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Always try to put the GART away from where VRAM is.

v2: correctly handle the 4GB limitation

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2018-08-24 10:48:12 +02:00 committed by Alex Deucher
parent d9997b64c5
commit ec210e3226
1 changed files with 5 additions and 3 deletions
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8
drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
View file

@ -116,6 +116,7 @@ void amdgpu_gmc_vram_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc,
*/
void amdgpu_gmc_gart_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc)
{
const uint64_t four_gb = 0x100000000ULL;
u64 size_af, size_bf;
mc->gart_size += adev->pm.smu_prv_buffer_size;
@ -124,8 +125,7 @@ void amdgpu_gmc_gart_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc)
* the GART base on a 4GB boundary as well.
*/
size_bf = mc->vram_start;
size_af = adev->gmc.mc_mask + 1 -
ALIGN(mc->vram_end + 1, 0x100000000ULL);
size_af = adev->gmc.mc_mask + 1 - ALIGN(mc->vram_end + 1, four_gb);
if (mc->gart_size > max(size_bf, size_af)) {
dev_warn(adev->dev, "limiting GART\n");
@ -136,7 +136,9 @@ void amdgpu_gmc_gart_location(struct amdgpu_device *adev, struct amdgpu_gmc *mc)
(size_af < mc->gart_size))
mc->gart_start = 0;
else
mc->gart_start = ALIGN(mc->vram_end + 1, 0x100000000ULL);
mc->gart_start = mc->mc_mask - mc->gart_size + 1;
mc->gart_start &= four_gb - 1;
mc->gart_end = mc->gart_start + mc->gart_size - 1;
dev_info(adev->dev, "GART: %lluM 0x%016llX - 0x%016llX\n",
mc->gart_size >> 20, mc->gart_start, mc->gart_end);