nouveau: add an ioctl to report vram usage

This reports the currently used vram allocations. userspace using this has been proposed for nvk, but it's a rather trivial uapi addition.

Dave Airlie committed 2 years ago

Commit 72fa02f1 parent 3f4d8aa2 files · +12 −0Browse files

Unified · Split

2 files

@@ -267,6 +267,11 @@ nouveau_abi16_ioctl_getparam(ABI16_IOCTL_ARGS) · 266 unmodified lines
267	267	case NOUVEAU_GETPARAM_VRAM_BAR_SIZE:
268	268	getparam->value = nvkm_device->func->resource_size(nvkm_device, 1);
269	269	break;
	270	+ case NOUVEAU_GETPARAM_VRAM_USED: {
	271	+ struct ttm_resource_manager *vram_mgr = ttm_manager_type(&drm->ttm.bdev, TTM_PL_VRAM);
	272	+ getparam->value = (u64)ttm_resource_manager_usage(vram_mgr) << PAGE_SHIFT;
	273	+ break;
	274	+ }
270	275	default:
271	276	NV_PRINTK(dbg, cli, "unknown parameter %lld\n", getparam->param);
272	277	return -EINVAL;

@@ -61,6 +61,13 @@ extern "C" { · 60 unmodified lines
61	61	*/
62	62	#define NOUVEAU_GETPARAM_VRAM_BAR_SIZE 18
63	63
	64	+/*
	65	+ * NOUVEAU_GETPARAM_VRAM_USED
	66	+ *
	67	+ * Get remaining VRAM size.
	68	+ */
	69	+#define NOUVEAU_GETPARAM_VRAM_USED 19
	70	+
64	71	struct drm_nouveau_getparam {
65	72	__u64 param;
66	73	__u64 value;