drm/amdgpu: cleanup initializing gtt_size

Stop spreading the code over all GMC generations.

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

6 files changed, 25 insertions, 36 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 20e0ed96efbb..df63823ad4db 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -559,6 +559,7 @@ struct amdgpu_gart {
         const struct amdgpu_gart_funcs *gart_funcs;
 };
 
+void amdgpu_gart_set_defaults(struct amdgpu_device *adev);
 int amdgpu_gart_table_ram_alloc(struct amdgpu_device *adev);
 void amdgpu_gart_table_ram_free(struct amdgpu_device *adev);
 int amdgpu_gart_table_vram_alloc(struct amdgpu_device *adev);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
index a57abc1a25fb..982b1cc11dac 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
@@ -55,6 +55,26 @@
 /*
  * Common GART table functions.
  */
+
+/**
+ * amdgpu_gart_set_defaults - set the default gtt_size
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Set the default gtt_size based on parameters and available VRAM.
+ */
+void amdgpu_gart_set_defaults(struct amdgpu_device *adev)
+{
+        /* unless the user had overridden it, set the gart
+         * size equal to the 1024 or vram, whichever is larger.
+         */
+        if (amdgpu_gart_size == -1)
+                adev->mc.gtt_size = max((AMDGPU_DEFAULT_GTT_SIZE_MB << 20),
+                                        adev->mc.mc_vram_size);
+        else
+                adev->mc.gtt_size = (uint64_t)amdgpu_gart_size << 20;
+}
+
 /**
  * amdgpu_gart_table_ram_alloc - allocate system ram for gart page table
  *
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
index c1a124a86775..5f7750c6497e 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c
@@ -321,15 +321,7 @@ static int gmc_v6_0_mc_init(struct amdgpu_device *adev)
         adev->mc.real_vram_size = RREG32(mmCONFIG_MEMSIZE) * 1024ULL * 1024ULL;
         adev->mc.visible_vram_size = adev->mc.aper_size;
 
-        /* unless the user had overridden it, set the gart
-         * size equal to the 1024 or vram, whichever is larger.
-         */
-        if (amdgpu_gart_size == -1)
-                adev->mc.gtt_size = max((AMDGPU_DEFAULT_GTT_SIZE_MB << 20),
-                                        adev->mc.mc_vram_size);
-        else
-                adev->mc.gtt_size = (uint64_t)amdgpu_gart_size << 20;
-
+        amdgpu_gart_set_defaults(adev);
         gmc_v6_0_vram_gtt_location(adev, &adev->mc);
 
         return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
index 575d72583746..388b52febc8b 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
@@ -373,15 +373,7 @@ static int gmc_v7_0_mc_init(struct amdgpu_device *adev)
         if (adev->mc.visible_vram_size > adev->mc.real_vram_size)
                 adev->mc.visible_vram_size = adev->mc.real_vram_size;
 
-        /* unless the user had overridden it, set the gart
-         * size equal to the 1024 or vram, whichever is larger.
-         */
-        if (amdgpu_gart_size == -1)
-                adev->mc.gtt_size = max((AMDGPU_DEFAULT_GTT_SIZE_MB << 20),
-                                        adev->mc.mc_vram_size);
-        else
-                adev->mc.gtt_size = (uint64_t)amdgpu_gart_size << 20;
-
+        amdgpu_gart_set_defaults(adev);
         gmc_v7_0_vram_gtt_location(adev, &adev->mc);
 
         return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
index 6379177b9fcb..d148d1c585b3 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
@@ -535,15 +535,7 @@ static int gmc_v8_0_mc_init(struct amdgpu_device *adev)
         if (adev->mc.visible_vram_size > adev->mc.real_vram_size)
                 adev->mc.visible_vram_size = adev->mc.real_vram_size;
 
-        /* unless the user had overridden it, set the gart
-         * size equal to the 1024 or vram, whichever is larger.
-         */
-        if (amdgpu_gart_size == -1)
-                adev->mc.gtt_size = max((AMDGPU_DEFAULT_GTT_SIZE_MB << 20),
-                                        adev->mc.mc_vram_size);
-        else
-                adev->mc.gtt_size = (uint64_t)amdgpu_gart_size << 20;
-
+        amdgpu_gart_set_defaults(adev);
         gmc_v8_0_vram_gtt_location(adev, &adev->mc);
 
         return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index c6394ea69f96..dbb43d99e02e 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -494,15 +494,7 @@ static int gmc_v9_0_mc_init(struct amdgpu_device *adev)
         if (adev->mc.visible_vram_size > adev->mc.real_vram_size)
                 adev->mc.visible_vram_size = adev->mc.real_vram_size;
 
-        /* unless the user had overridden it, set the gart
-         * size equal to the 1024 or vram, whichever is larger.
-         */
-        if (amdgpu_gart_size == -1)
-                adev->mc.gtt_size = max((AMDGPU_DEFAULT_GTT_SIZE_MB << 20),
-                                        adev->mc.mc_vram_size);
-        else
-                adev->mc.gtt_size = (uint64_t)amdgpu_gart_size << 20;
-
+        amdgpu_gart_set_defaults(adev);
         gmc_v9_0_vram_gtt_location(adev, &adev->mc);
 
         return 0;