drm/amdgpu:cleanup GMC & gart garbage function

for gart_ram_alloc/free, they are never used in driver thus
ripe them out totally.

for gart_vram_pin/unpin, they are not needed becuase we can
use bo_creat_kernel/free to replace the original manual way
in the gart_vram_alloc/free, thus gart_vram_pin/unpin can
also be riped out.
Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c

@@ -56,63 +56,6 @@
  * Common GART table functions.
  */
 
-/**
- * amdgpu_gart_table_ram_alloc - allocate system ram for gart page table
- *
- * @adev: amdgpu_device pointer
- *
- * Allocate system memory for GART page table
- * (r1xx-r3xx, non-pcie r4xx, rs400).  These asics require the
- * gart table to be in system memory.
- * Returns 0 for success, -ENOMEM for failure.
- */
-int amdgpu_gart_table_ram_alloc(struct amdgpu_device *adev)
-{
-	void *ptr;
-
-	ptr = pci_alloc_consistent(adev->pdev, adev->gart.table_size,
-				   &adev->gart.table_addr);
-	if (ptr == NULL) {
-		return -ENOMEM;
-	}
-#ifdef CONFIG_X86
-	if (0) {
-		set_memory_uc((unsigned long)ptr,
-			      adev->gart.table_size >> PAGE_SHIFT);
-	}
-#endif
-	adev->gart.ptr = ptr;
-	memset((void *)adev->gart.ptr, 0, adev->gart.table_size);
-	return 0;
-}
-
-/**
- * amdgpu_gart_table_ram_free - free system ram for gart page table
- *
- * @adev: amdgpu_device pointer
- *
- * Free system memory for GART page table
- * (r1xx-r3xx, non-pcie r4xx, rs400).  These asics require the
- * gart table to be in system memory.
- */
-void amdgpu_gart_table_ram_free(struct amdgpu_device *adev)
-{
-	if (adev->gart.ptr == NULL) {
-		return;
-	}
-#ifdef CONFIG_X86
-	if (0) {
-		set_memory_wb((unsigned long)adev->gart.ptr,
-			      adev->gart.table_size >> PAGE_SHIFT);
-	}
-#endif
-	pci_free_consistent(adev->pdev, adev->gart.table_size,
-			    (void *)adev->gart.ptr,
-			    adev->gart.table_addr);
-	adev->gart.ptr = NULL;
-	adev->gart.table_addr = 0;
-}
-
 /**
  * amdgpu_gart_table_vram_alloc - allocate vram for gart page table
  *
@@ -125,75 +68,9 @@ void amdgpu_gart_table_ram_free(struct amdgpu_device *adev)
  */
 int amdgpu_gart_table_vram_alloc(struct amdgpu_device *adev)
 {
-	int r;
-
-	if (adev->gart.robj == NULL) {
-		r = amdgpu_bo_create(adev, adev->gart.table_size,
-				     PAGE_SIZE, true, AMDGPU_GEM_DOMAIN_VRAM,
-				     AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
-				     AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS,
-				     NULL, NULL, 0, &adev->gart.robj);
-		if (r) {
-			return r;
-		}
-	}
-	return 0;
-}
-
-/**
- * amdgpu_gart_table_vram_pin - pin gart page table in vram
- *
- * @adev: amdgpu_device pointer
- *
- * Pin the GART page table in vram so it will not be moved
- * by the memory manager (pcie r4xx, r5xx+).  These asics require the
- * gart table to be in video memory.
- * Returns 0 for success, error for failure.
- */
-int amdgpu_gart_table_vram_pin(struct amdgpu_device *adev)
-{
-	uint64_t gpu_addr;
-	int r;
-
-	r = amdgpu_bo_reserve(adev->gart.robj, false);
-	if (unlikely(r != 0))
-		return r;
-	r = amdgpu_bo_pin(adev->gart.robj,
-				AMDGPU_GEM_DOMAIN_VRAM, &gpu_addr);
-	if (r) {
-		amdgpu_bo_unreserve(adev->gart.robj);
-		return r;
-	}
-	r = amdgpu_bo_kmap(adev->gart.robj, &adev->gart.ptr);
-	if (r)
-		amdgpu_bo_unpin(adev->gart.robj);
-	amdgpu_bo_unreserve(adev->gart.robj);
-	adev->gart.table_addr = gpu_addr;
-	return r;
-}
-
-/**
- * amdgpu_gart_table_vram_unpin - unpin gart page table in vram
- *
- * @adev: amdgpu_device pointer
- *
- * Unpin the GART page table in vram (pcie r4xx, r5xx+).
- * These asics require the gart table to be in video memory.
- */
-void amdgpu_gart_table_vram_unpin(struct amdgpu_device *adev)
-{
-	int r;
-
-	if (adev->gart.robj == NULL) {
-		return;
-	}
-	r = amdgpu_bo_reserve(adev->gart.robj, true);
-	if (likely(r == 0)) {
-		amdgpu_bo_kunmap(adev->gart.robj);
-		amdgpu_bo_unpin(adev->gart.robj);
-		amdgpu_bo_unreserve(adev->gart.robj);
-		adev->gart.ptr = NULL;
-	}
+	return amdgpu_bo_create_kernel(adev, adev->gart.table_size, PAGE_SIZE,
+					AMDGPU_GEM_DOMAIN_VRAM, &adev->gart.robj,
+					&adev->gart.table_addr, &adev->gart.ptr);
 }
 
 /**
@@ -207,10 +84,9 @@ void amdgpu_gart_table_vram_unpin(struct amdgpu_device *adev)
  */
 void amdgpu_gart_table_vram_free(struct amdgpu_device *adev)
 {
-	if (adev->gart.robj == NULL) {
-		return;
-	}
-	amdgpu_bo_unref(&adev->gart.robj);
+	amdgpu_bo_free_kernel(&adev->gart.robj,
+				&adev->gart.table_addr,
+				&adev->gart.ptr);
 }
 
 /*

drivers/gpu/drm/amd/amdgpu/amdgpu_gart.h

@@ -56,12 +56,8 @@ struct amdgpu_gart {
 	const struct amdgpu_gart_funcs *gart_funcs;
 };
 
-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);
 void amdgpu_gart_table_vram_free(struct amdgpu_device *adev);
-int amdgpu_gart_table_vram_pin(struct amdgpu_device *adev);
-void amdgpu_gart_table_vram_unpin(struct amdgpu_device *adev);
 int amdgpu_gart_init(struct amdgpu_device *adev);
 void amdgpu_gart_fini(struct amdgpu_device *adev);
 int amdgpu_gart_unbind(struct amdgpu_device *adev, uint64_t offset,

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

@@ -1397,8 +1397,6 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
 
 void amdgpu_ttm_fini(struct amdgpu_device *adev)
 {
-	int r;
-
 	if (!adev->mman.initialized)
 		return;
 

drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c

@@ -483,16 +483,14 @@ static void gmc_v6_0_set_prt(struct amdgpu_device *adev, bool enable)
 
 static int gmc_v6_0_gart_enable(struct amdgpu_device *adev)
 {
-	int r, i;
+	int i;
 	u32 field;
 
 	if (adev->gart.robj == NULL) {
 		dev_err(adev->dev, "No VRAM object for PCIE GART.\n");
 		return -EINVAL;
 	}
-	r = amdgpu_gart_table_vram_pin(adev);
-	if (r)
-		return r;
+
 	/* Setup TLB control */
 	WREG32(mmMC_VM_MX_L1_TLB_CNTL,
 	       (0xA << 7) |
@@ -619,7 +617,6 @@ static void gmc_v6_0_gart_disable(struct amdgpu_device *adev)
 	WREG32(mmVM_L2_CNTL3,
 	       VM_L2_CNTL3__L2_CACHE_BIGK_ASSOCIATIVITY_MASK |
 	       (0UL << VM_L2_CNTL3__L2_CACHE_BIGK_FRAGMENT_SIZE__SHIFT));
-	amdgpu_gart_table_vram_unpin(adev);
 }
 
 static void gmc_v6_0_gart_fini(struct amdgpu_device *adev)

drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c

@@ -588,16 +588,14 @@ static void gmc_v7_0_set_prt(struct amdgpu_device *adev, bool enable)
  */
 static int gmc_v7_0_gart_enable(struct amdgpu_device *adev)
 {
-	int r, i;
+	int i;
 	u32 tmp, field;
 
 	if (adev->gart.robj == NULL) {
 		dev_err(adev->dev, "No VRAM object for PCIE GART.\n");
 		return -EINVAL;
 	}
-	r = amdgpu_gart_table_vram_pin(adev);
-	if (r)
-		return r;
+
 	/* Setup TLB control */
 	tmp = RREG32(mmMC_VM_MX_L1_TLB_CNTL);
 	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, ENABLE_L1_TLB, 1);
@@ -730,7 +728,6 @@ static void gmc_v7_0_gart_disable(struct amdgpu_device *adev)
 	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, ENABLE_L2_CACHE, 0);
 	WREG32(mmVM_L2_CNTL, tmp);
 	WREG32(mmVM_L2_CNTL2, 0);
-	amdgpu_gart_table_vram_unpin(adev);
 }
 
 /**

drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c

@@ -787,16 +787,14 @@ static void gmc_v8_0_set_prt(struct amdgpu_device *adev, bool enable)
  */
 static int gmc_v8_0_gart_enable(struct amdgpu_device *adev)
 {
-	int r, i;
+	int i;
 	u32 tmp, field;
 
 	if (adev->gart.robj == NULL) {
 		dev_err(adev->dev, "No VRAM object for PCIE GART.\n");
 		return -EINVAL;
 	}
-	r = amdgpu_gart_table_vram_pin(adev);
-	if (r)
-		return r;
+
 	/* Setup TLB control */
 	tmp = RREG32(mmMC_VM_MX_L1_TLB_CNTL);
 	tmp = REG_SET_FIELD(tmp, MC_VM_MX_L1_TLB_CNTL, ENABLE_L1_TLB, 1);
@@ -946,7 +944,6 @@ static void gmc_v8_0_gart_disable(struct amdgpu_device *adev)
 	tmp = REG_SET_FIELD(tmp, VM_L2_CNTL, ENABLE_L2_CACHE, 0);
 	WREG32(mmVM_L2_CNTL, tmp);
 	WREG32(mmVM_L2_CNTL2, 0);
-	amdgpu_gart_table_vram_unpin(adev);
 }
 
 /**

drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c

@@ -869,7 +869,7 @@ static int gmc_v9_0_sw_init(void *handle)
 }
 
 /**
- * gmc_v8_0_gart_fini - vm fini callback
+ * gmc_v9_0_gart_fini - vm fini callback
  *
  * @adev: amdgpu_device pointer
  *
@@ -933,9 +933,6 @@ static int gmc_v9_0_gart_enable(struct amdgpu_device *adev)
 		dev_err(adev->dev, "No VRAM object for PCIE GART.\n");
 		return -EINVAL;
 	}
-	r = amdgpu_gart_table_vram_pin(adev);
-	if (r)
-		return r;
 
 	switch (adev->asic_type) {
 	case CHIP_RAVEN:
@@ -1013,7 +1010,6 @@ static void gmc_v9_0_gart_disable(struct amdgpu_device *adev)
 {
 	gfxhub_v1_0_gart_disable(adev);
 	mmhub_v1_0_gart_disable(adev);
-	amdgpu_gart_table_vram_unpin(adev);
 }
 
 static int gmc_v9_0_hw_fini(void *handle)