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nouveau: add an ioctl to report vram usage

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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: Faith Ekstrand <faith.ekstrand@collabora.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2024-01-24 14:24:25 +10:00
parent 3f4d8aac6e
commit 72fa02fdf8
2 changed files with 12 additions and 0 deletions
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5
drivers/gpu/drm/nouveau/nouveau_abi16.c
View File

@ -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;

7
include/uapi/drm/nouveau_drm.h
View File

@ -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;