Revert "drm/amdgpu: use the kernel zone memory size as the max remote memory in amdgpu"

This reverts commit a693e050edfe794fea81d7cfe72429a406aa380b.

This breaks on systems with huge amounts of system memory as we do not have
enough vram to store the page tables.  Additionally, this is less of an issue
with the recent gtt manager changes.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

5 files changed, 8 insertions, 27 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index f53e52f4d672..29d3a914fc88 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1679,8 +1679,6 @@ uint32_t amdgpu_ttm_tt_pte_flags(struct amdgpu_device *adev, struct ttm_tt *ttm,
 void amdgpu_vram_location(struct amdgpu_device *adev, struct amdgpu_mc *mc, u64 base);
 void amdgpu_gtt_location(struct amdgpu_device *adev, struct amdgpu_mc *mc);
 void amdgpu_ttm_set_active_vram_size(struct amdgpu_device *adev, u64 size);
-u64 amdgpu_ttm_get_gtt_mem_size(struct amdgpu_device *adev);
-int amdgpu_ttm_global_init(struct amdgpu_device *adev);
 int amdgpu_ttm_init(struct amdgpu_device *adev);
 void amdgpu_ttm_fini(struct amdgpu_device *adev);
 void amdgpu_program_register_sequence(struct amdgpu_device *adev,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 8f18b8ed2b3a..bc70f80260d8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -34,7 +34,6 @@
 #include <ttm/ttm_placement.h>
 #include <ttm/ttm_module.h>
 #include <ttm/ttm_page_alloc.h>
-#include <ttm/ttm_memory.h>
 #include <drm/drmP.h>
 #include <drm/amdgpu_drm.h>
 #include <linux/seq_file.h>
@@ -65,7 +64,7 @@ static void amdgpu_ttm_mem_global_release(struct drm_global_reference *ref)
 	ttm_mem_global_release(ref->object);
 }
 
-int amdgpu_ttm_global_init(struct amdgpu_device *adev)
+static int amdgpu_ttm_global_init(struct amdgpu_device *adev)
 {
 	struct drm_global_reference *global_ref;
 	struct amdgpu_ring *ring;
@@ -1151,6 +1150,10 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
 	unsigned i, j;
 	int r;
 
+	r = amdgpu_ttm_global_init(adev);
+	if (r) {
+		return r;
+	}
 	/* No others user of address space so set it to 0 */
 	r = ttm_bo_device_init(&adev->mman.bdev,
 			       adev->mman.bo_global_ref.ref.object,
@@ -1650,8 +1653,3 @@ static void amdgpu_ttm_debugfs_fini(struct amdgpu_device *adev)
 
 #endif
 }
-
-u64 amdgpu_ttm_get_gtt_mem_size(struct amdgpu_device *adev)
-{
-	return ttm_get_kernel_zone_memory_size(adev->mman.mem_global_ref.object);
-}
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
index 64d3c1e6014c..45a573e63d4a 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
@@ -335,7 +335,7 @@ static int gmc_v6_0_mc_init(struct amdgpu_device *adev)
 	 * size equal to the 1024 or vram, whichever is larger.
 	 */
 	if (amdgpu_gart_size == -1)
-		adev->mc.gtt_size = amdgpu_ttm_get_gtt_mem_size(adev);
+		adev->mc.gtt_size = max((1024ULL << 20), adev->mc.mc_vram_size);
 	else
 		adev->mc.gtt_size = (uint64_t)amdgpu_gart_size << 20;
 
@@ -795,11 +795,6 @@ static int gmc_v6_0_sw_init(void *handle)
 		return r;
 	}
 
-	r = amdgpu_ttm_global_init(adev);
-	if (r) {
-		return r;
-	}
-
 	r = gmc_v6_0_mc_init(adev);
 	if (r)
 		return r;
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
index fbe1d9ac500a..273b16fb9459 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
@@ -385,7 +385,7 @@ static int gmc_v7_0_mc_init(struct amdgpu_device *adev)
 	 * size equal to the 1024 or vram, whichever is larger.
 	 */
 	if (amdgpu_gart_size == -1)
-		adev->mc.gtt_size = amdgpu_ttm_get_gtt_mem_size(adev);
+		adev->mc.gtt_size = max((1024ULL << 20), adev->mc.mc_vram_size);
 	else
 		adev->mc.gtt_size = (uint64_t)amdgpu_gart_size << 20;
 
@@ -945,11 +945,6 @@ static int gmc_v7_0_sw_init(void *handle)
 		return r;
 	}
 
-	r = amdgpu_ttm_global_init(adev);
-	if (r) {
-		return r;
-	}
-
 	r = gmc_v7_0_mc_init(adev);
 	if (r)
 		return r;
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
index 12ea3404dd65..0daac3a5be79 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
@@ -472,7 +472,7 @@ static int gmc_v8_0_mc_init(struct amdgpu_device *adev)
 	 * size equal to the 1024 or vram, whichever is larger.
 	 */
 	if (amdgpu_gart_size == -1)
-		adev->mc.gtt_size = amdgpu_ttm_get_gtt_mem_size(adev);
+		adev->mc.gtt_size = max((1024ULL << 20), adev->mc.mc_vram_size);
 	else
 		adev->mc.gtt_size = (uint64_t)amdgpu_gart_size << 20;
 
@@ -952,11 +952,6 @@ static int gmc_v8_0_sw_init(void *handle)
 		return r;
 	}
 
-	r = amdgpu_ttm_global_init(adev);
-	if (r) {
-		return r;
-	}
-
 	r = gmc_v8_0_mc_init(adev);
 	if (r)
 		return r;