Commit 72fa02fd authored by Dave Airlie's avatar Dave Airlie
Browse files

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.

Reviewed-by: default avatarFaith Ekstrand <faith.ekstrand@collabora.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 3f4d8aac

drivers/gpu/drm/nouveau/nouveau_abi16.c

+5 −0
Original line number Diff line number Diff line
@@ -267,6 +267,11 @@ nouveau_abi16_ioctl_getparam(ABI16_IOCTL_ARGS) 
	case NOUVEAU_GETPARAM_VRAM_BAR_SIZE:

		getparam->value = nvkm_device->func->resource_size(nvkm_device, 1);

		break;

	case NOUVEAU_GETPARAM_VRAM_USED: {

		struct ttm_resource_manager *vram_mgr = ttm_manager_type(&drm->ttm.bdev, TTM_PL_VRAM);

		getparam->value = (u64)ttm_resource_manager_usage(vram_mgr) << PAGE_SHIFT;

		break;

	}

	default:

		NV_PRINTK(dbg, cli, "unknown parameter %lld\n", getparam->param);

		return -EINVAL;

include/uapi/drm/nouveau_drm.h

+7 −0
Original line number Diff line number Diff line
@@ -61,6 +61,13 @@ extern "C" { 
 */

#define NOUVEAU_GETPARAM_VRAM_BAR_SIZE 18



/*

 * NOUVEAU_GETPARAM_VRAM_USED

 *

 * Get remaining VRAM size.

 */

#define NOUVEAU_GETPARAM_VRAM_USED 19



struct drm_nouveau_getparam {

	__u64 param;

	__u64 value;