drm/nouveau: nvkm/vmm: implement raw ops to manage uvmm

The new VM_BIND UAPI uses the DRM GPU VA manager to manage the VA space.
Hence, we a need a way to manipulate the MMUs page tables without going
through the internal range allocator implemented by nvkm/vmm.

This patch adds a raw interface for nvkm/vmm to pass the resposibility
for managing the address space and the corresponding map/unmap/sparse
operations to the upper layers.

Reviewed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230804182406.5222-11-dakr@redhat.com

1 files changed, 19 insertions, 1 deletions

diff --git a/drivers/gpu/drm/nouveau/include/nvkm/subdev/mmu.h b/drivers/gpu/drm/nouveau/include/nvkm/subdev/mmu.h
index 70e7887ef4b4..2fd2f2433fc7 100644
--- a/drivers/gpu/drm/nouveau/include/nvkm/subdev/mmu.h
+++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/mmu.h
@@ -17,6 +17,7 @@ struct nvkm_vma {
 	bool part:1; /* Region was split from an allocated region by map(). */
 	bool busy:1; /* Region busy (for temporarily preventing user access). */
 	bool mapped:1; /* Region contains valid pages. */
+	bool no_comp:1; /* Force no memory compression. */
 	struct nvkm_memory *memory; /* Memory currently mapped into VMA. */
 	struct nvkm_tags *tags; /* Compression tag reference. */
 };
@@ -27,10 +28,26 @@ struct nvkm_vmm {
 	const char *name;
 	u32 debug;
 	struct kref kref;
-	struct mutex mutex;
+
+	struct {
+		struct mutex vmm;
+		struct mutex ref;
+		struct mutex map;
+	} mutex;
 
 	u64 start;
 	u64 limit;
+	struct {
+		struct {
+			u64 addr;
+			u64 size;
+		} p;
+		struct {
+			u64 addr;
+			u64 size;
+		} n;
+		bool raw;
+	} managed;
 
 	struct nvkm_vmm_pt *pd;
 	struct list_head join;
@@ -70,6 +87,7 @@ struct nvkm_vmm_map {
 
 	const struct nvkm_vmm_page *page;
 
+	bool no_comp;
 	struct nvkm_tags *tags;
 	u64 next;
 	u64 type;