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nouveau: add an ioctl to return vram bar size.

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[ Upstream commit 3f4d8aac6e768c2215ce68275256971c2f54f0c8 ]

This returns the BAR resources size so userspace can make
decisions based on rebar support.

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>
Stable-dep-of: aed9a1a4f710 ("drm/nouveau: use tile_mode and pte_kind for VM_BIND bo allocations")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dave Airlie 2024-01-24 13:50:58 +10:00 committed by Greg Kroah-Hartman
parent 38c2fd9aed
commit 929eaf32dd
2 changed files with 11 additions and 0 deletions
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4
drivers/gpu/drm/nouveau/nouveau_abi16.c
View File

@ -204,6 +204,7 @@ nouveau_abi16_ioctl_getparam(ABI16_IOCTL_ARGS)
struct nouveau_cli *cli = nouveau_cli(file_priv);
struct nouveau_drm *drm = nouveau_drm(dev);
struct nvif_device *device = &drm->client.device;
struct nvkm_device *nvkm_device = nvxx_device(&drm->client.device);
struct nvkm_gr *gr = nvxx_gr(device);
struct drm_nouveau_getparam *getparam = data;
struct pci_dev *pdev = to_pci_dev(dev->dev);
@ -268,6 +269,9 @@ nouveau_abi16_ioctl_getparam(ABI16_IOCTL_ARGS)
getparam->value = nouveau_exec_push_max_from_ib_max(ib_max);
break;
}
case NOUVEAU_GETPARAM_VRAM_BAR_SIZE:
getparam->value = nvkm_device->func->resource_size(nvkm_device, 1);
break;
default:
NV_PRINTK(dbg, cli, "unknown parameter %lld\n", getparam->param);
return -EINVAL;

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

@ -54,6 +54,13 @@ extern "C" {
*/
#define NOUVEAU_GETPARAM_EXEC_PUSH_MAX 17
/*
* NOUVEAU_GETPARAM_VRAM_BAR_SIZE - query bar size
*
* Query the VRAM BAR size.
*/
#define NOUVEAU_GETPARAM_VRAM_BAR_SIZE 18
struct drm_nouveau_getparam {
__u64 param;
__u64 value;