This is a note to let you know that I've just added the patch titled
nouveau: add an ioctl to return vram bar size.
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nouveau-add-an-ioctl-to-return-vram-bar-size.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 1bbf3a0808765f6a8b1b1d4b13f3a502c73653e5
Author: Dave Airlie <airlied@xxxxxxxxxx>
Date: Wed Jan 24 13:50:58 2024 +1000
nouveau: add an ioctl to return vram bar size.
[ 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@xxxxxxxxxxxxx>
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Stable-dep-of: aed9a1a4f710 ("drm/nouveau: use tile_mode and pte_kind for VM_BIND bo allocations")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/nouveau/nouveau_abi16.c b/drivers/gpu/drm/nouveau/nouveau_abi16.c
index 2edd7bb13faea..d05bd0ecea2b5 100644
--- a/drivers/gpu/drm/nouveau/nouveau_abi16.c
+++ b/drivers/gpu/drm/nouveau/nouveau_abi16.c
@@ -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;
diff --git a/include/uapi/drm/nouveau_drm.h b/include/uapi/drm/nouveau_drm.h
index 0bade1592f34f..10a917639d8d3 100644
--- a/include/uapi/drm/nouveau_drm.h
+++ b/include/uapi/drm/nouveau_drm.h
@@ -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;
