drm/amd/amdgpu: unify memory query info interface

Signed-off-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -411,32 +411,34 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
 		return copy_to_user(out, &vram_gtt,
 				    min((size_t)size, sizeof(vram_gtt))) ? -EFAULT : 0;
 	}
-	case AMDGPU_INFO_VRAM_GTT_TOTAL: {
-		struct drm_amdgpu_info_vram_gtt_total vram_gtt_total;
+	case AMDGPU_INFO_MEMORY: {
+		struct drm_amdgpu_memory_info mem;
 
-		vram_gtt_total.vram_total_size = adev->mc.real_vram_size;
-		vram_gtt_total.vram_cpu_accessible_total_size = adev->mc.visible_vram_size;
-		vram_gtt_total.gtt_total_size = adev->mc.gtt_size;
-		return copy_to_user(out, &vram_gtt_total,
-				    min((size_t)size, sizeof(vram_gtt_total)))
-				    ? -EFAULT : 0;
-	}
-	case AMDGPU_INFO_VRAM_GTT_MAX: {
-		struct drm_amdgpu_info_vram_gtt_max vram_gtt_max;
-		u64 max_size;
+		memset(&mem, 0, sizeof(mem));
+		mem.vram.total_heap_size = adev->mc.real_vram_size;
+		mem.vram.usable_heap_size =
+			adev->mc.real_vram_size - adev->vram_pin_size;
+		mem.vram.heap_usage = atomic64_read(&adev->vram_usage);
+		mem.vram.max_allocation = mem.vram.usable_heap_size * 3 / 4;
 
-		max_size = adev->mc.real_vram_size - adev->vram_pin_size;
-		vram_gtt_max.vram_max_size = max_size * 3 / 4;
+		mem.cpu_accessible_vram.total_heap_size =
+			adev->mc.visible_vram_size;
+		mem.cpu_accessible_vram.usable_heap_size =
+			adev->mc.visible_vram_size -
+			(adev->vram_pin_size - adev->invisible_pin_size);
+		mem.cpu_accessible_vram.heap_usage =
+			atomic64_read(&adev->vram_vis_usage);
+		mem.cpu_accessible_vram.max_allocation =
+			mem.cpu_accessible_vram.usable_heap_size * 3 / 4;
 
-		max_size = adev->mc.visible_vram_size - (adev->vram_pin_size -
-				adev->invisible_pin_size);
-		vram_gtt_max.vram_cpu_accessible_max_size = max_size * 3 / 4;
+		mem.gtt.total_heap_size = adev->mc.gtt_size;
+		mem.gtt.usable_heap_size =
+			adev->mc.gtt_size - adev->gart_pin_size;
+		mem.gtt.heap_usage = atomic64_read(&adev->gtt_usage);
+		mem.gtt.max_allocation = mem.gtt.usable_heap_size * 3 / 4;
 
-		max_size = adev->mc.gtt_size - adev->gart_pin_size;
-		vram_gtt_max.gtt_max_size = max_size * 3 / 4;
-
-		return copy_to_user(out, &vram_gtt_max,
-				    min((size_t)size, sizeof(vram_gtt_max)))
+		return copy_to_user(out, &mem,
+				    min((size_t)size, sizeof(mem)))
 				    ? -EFAULT : 0;
 	}
 	case AMDGPU_INFO_READ_MMR_REG: {

include/uapi/drm/amdgpu_drm.h

@@ -489,10 +489,8 @@ struct drm_amdgpu_cs_chunk_data {
 #define AMDGPU_INFO_VIS_VRAM_USAGE		0x17
 /* number of TTM buffer evictions */
 #define AMDGPU_INFO_NUM_EVICTIONS		0x18
-/* Query the total size of VRAM and GTT domains */
-#define AMDGPU_INFO_VRAM_GTT_TOTAL		0x19
-/* Query the max allocation size of VRAM and GTT domains */
-#define AMDGPU_INFO_VRAM_GTT_MAX		0x1a
+/* Query memory about VRAM and GTT domains */
+#define AMDGPU_INFO_MEMORY			0x19
 
 #define AMDGPU_INFO_MMR_SE_INDEX_SHIFT	0
 #define AMDGPU_INFO_MMR_SE_INDEX_MASK	0xff
@@ -578,16 +576,32 @@ struct drm_amdgpu_info_vram_gtt {
 	__u64 gtt_size;
 };
 
-struct drm_amdgpu_info_vram_gtt_total {
-	__u64 vram_total_size;
-	__u64 vram_cpu_accessible_total_size;
-	__u64 gtt_total_size;
+struct drm_amdgpu_heap_info {
+	/** max. physical memory */
+	__u64 total_heap_size;
+
+	/** Theoretical max. available memory in the given heap */
+	__u64 usable_heap_size;
+
+	/**
+	 * Number of bytes allocated in the heap. This includes all processes
+	 * and private allocations in the kernel. It changes when new buffers
+	 * are allocated, freed, and moved. It cannot be larger than
+	 * heap_size.
+	 */
+	__u64 heap_usage;
+
+	/**
+	 * Theoretical possible max. size of buffer which
+	 * could be allocated in the given heap
+	 */
+	__u64 max_allocation;
 };
 
-struct drm_amdgpu_info_vram_gtt_max {
-	__u64 vram_max_size;
-	__u64 vram_cpu_accessible_max_size;
-	__u64 gtt_max_size;
+struct drm_amdgpu_memory_info {
+	struct drm_amdgpu_heap_info vram;
+	struct drm_amdgpu_heap_info cpu_accessible_vram;
+	struct drm_amdgpu_heap_info gtt;
 };
 
 struct drm_amdgpu_info_firmware {