drm/amdgpu: set vm size and block size by individual gmc by default (v3)
By default, the value is set by individual gmc.
if a specific value is input, it overrides the global value for all
v2: create helper funcs
v3: update gmc9 APU's num_level athough it may be updated in the future.
Signed-off-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 831c2bf..4836607 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1040,35 +1040,31 @@ static bool amdgpu_check_pot_argument(int arg)
return (arg & (arg - 1)) == 0;
}
-static void amdgpu_get_block_size(struct amdgpu_device *adev)
+static void amdgpu_check_block_size(struct amdgpu_device *adev)
{
/* defines number of bits in page table versus page directory,
* a page is 4KB so we have 12 bits offset, minimum 9 bits in the
* page table and the remaining bits are in the page directory */
- if (amdgpu_vm_block_size == -1) {
+ if (amdgpu_vm_block_size == -1)
+ return;
- /* Total bits covered by PD + PTs */
- unsigned bits = ilog2(amdgpu_vm_size) + 18;
-
- /* Make sure the PD is 4K in size up to 8GB address space.
- Above that split equal between PD and PTs */
- if (amdgpu_vm_size <= 8)
- amdgpu_vm_block_size = bits - 9;
- else
- amdgpu_vm_block_size = (bits + 3) / 2;
-
- } else if (amdgpu_vm_block_size < 9) {
+ if (amdgpu_vm_block_size < 9) {
dev_warn(adev->dev, "VM page table size (%d) too small\n",
amdgpu_vm_block_size);
- amdgpu_vm_block_size = 9;
+ goto def_value;
}
if (amdgpu_vm_block_size > 24 ||
(amdgpu_vm_size * 1024) < (1ull << amdgpu_vm_block_size)) {
dev_warn(adev->dev, "VM page table size (%d) too large\n",
amdgpu_vm_block_size);
- amdgpu_vm_block_size = 9;
+ goto def_value;
}
+
+ return;
+
+def_value:
+ amdgpu_vm_block_size = -1;
}
static void amdgpu_check_vm_size(struct amdgpu_device *adev)
@@ -1097,8 +1093,7 @@ static void amdgpu_check_vm_size(struct amdgpu_device *adev)
return;
def_value:
- amdgpu_vm_size = 8;
- dev_info(adev->dev, "set default VM size %dGB\n", amdgpu_vm_size);
+ amdgpu_vm_size = -1;
}
/**
@@ -1132,7 +1127,7 @@ static void amdgpu_check_arguments(struct amdgpu_device *adev)
amdgpu_check_vm_size(adev);
- amdgpu_get_block_size(adev);
+ amdgpu_check_block_size(adev);
if (amdgpu_vram_page_split != -1 && (amdgpu_vram_page_split < 16 ||
!amdgpu_check_pot_argument(amdgpu_vram_page_split))) {