drm/nouveau: uvmm: remove dedicated VM pointer from VMAs

VMAs can find their corresponding VM through their embedded struct
drm_gpuva which already carries a pointer to a struct drm_gpuva_manager
which the VM is based on. Hence, remove the struct nouveau_uvmm pointer
from struct nouveau_uvma to save a couple of bytes per mapping.
Reviewed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230807163238.2091-6-dakr@redhat.com

drivers/gpu/drm/nouveau/nouveau_uvmm.c

@@ -181,7 +181,7 @@ nouveau_uvma_vmm_put(struct nouveau_uvma *uvma)
 	u64 addr = uvma->va.va.addr;
 	u64 range = uvma->va.va.range;
 
-	return nouveau_uvmm_vmm_put(uvma->uvmm, addr, range);
+	return nouveau_uvmm_vmm_put(to_uvmm(uvma), addr, range);
 }
 
 static int
@@ -192,7 +192,7 @@ nouveau_uvma_map(struct nouveau_uvma *uvma,
 	u64 offset = uvma->va.gem.offset;
 	u64 range = uvma->va.va.range;
 
-	return nouveau_uvmm_vmm_map(uvma->uvmm, addr, range,
+	return nouveau_uvmm_vmm_map(to_uvmm(uvma), addr, range,
 				    offset, uvma->kind, mem);
 }
 
@@ -206,7 +206,7 @@ nouveau_uvma_unmap(struct nouveau_uvma *uvma)
 	if (drm_gpuva_invalidated(&uvma->va))
 		return 0;
 
-	return nouveau_uvmm_vmm_unmap(uvma->uvmm, addr, range, sparse);
+	return nouveau_uvmm_vmm_unmap(to_uvmm(uvma), addr, range, sparse);
 }
 
 static int
@@ -586,7 +586,6 @@ op_map_prepare(struct nouveau_uvmm *uvmm,
 	if (ret)
 		return ret;
 
-	uvma->uvmm = uvmm;
 	uvma->region = args->region;
 	uvma->kind = args->kind;
 
@@ -794,7 +793,7 @@ op_unmap_range(struct drm_gpuva_op_unmap *u,
 	bool sparse = !!uvma->region;
 
 	if (!drm_gpuva_invalidated(u->va))
-		nouveau_uvmm_vmm_unmap(uvma->uvmm, addr, range, sparse);
+		nouveau_uvmm_vmm_unmap(to_uvmm(uvma), addr, range, sparse);
 }
 
 static void

drivers/gpu/drm/nouveau/nouveau_uvmm.h

@@ -37,12 +37,15 @@ struct nouveau_uvma_region {
 struct nouveau_uvma {
 	struct drm_gpuva va;
 
-	struct nouveau_uvmm *uvmm;
 	struct nouveau_uvma_region *region;
-
 	u8 kind;
 };
 
+#define uvmm_from_mgr(x) container_of((x), struct nouveau_uvmm, umgr)
+#define uvma_from_va(x) container_of((x), struct nouveau_uvma, va)
+
+#define to_uvmm(x) uvmm_from_mgr((x)->va.mgr)
+
 struct nouveau_uvmm_bind_job {
 	struct nouveau_job base;
 
@@ -79,9 +82,6 @@ struct nouveau_uvmm_bind_job_args {
 
 #define to_uvmm_bind_job(job) container_of((job), struct nouveau_uvmm_bind_job, base)
 
-#define uvmm_from_mgr(x) container_of((x), struct nouveau_uvmm, umgr)
-#define uvma_from_va(x) container_of((x), struct nouveau_uvma, va)
-
 int nouveau_uvmm_init(struct nouveau_uvmm *uvmm, struct nouveau_cli *cli,
 		      u64 kernel_managed_addr, u64 kernel_managed_size);
 void nouveau_uvmm_fini(struct nouveau_uvmm *uvmm);