gpu: nvgpu: use nvgpu rbtree to store mapped buffers

Use nvgpu rbtree instead of linux rbtree to store
mapped buffers for each VM

Move to use "struct nvgpu_rbtree_node" instead of
"struct rb_node"
And similarly use rbtree APIs from <nvgpu/rbtree.h>
instead of linux APIs

Jira NVGPU-13

Change-Id: Id96ba76e20fa9ecad016cd5d5a6a7d40579a70f2
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1453043
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 5 insertions, 6 deletions

diff --git a/drivers/gpu/nvgpu/vgpu/mm_vgpu.c b/drivers/gpu/nvgpu/vgpu/mm_vgpu.c
index 7d0f7e9c..54ac36db 100644
--- a/drivers/gpu/nvgpu/vgpu/mm_vgpu.c
+++ b/drivers/gpu/nvgpu/vgpu/mm_vgpu.c
@@ -202,7 +202,7 @@ static void vgpu_vm_remove_support(struct vm_gk20a *vm)
         struct vm_reserved_va_node *va_node, *va_node_tmp;
         struct tegra_vgpu_cmd_msg msg;
         struct tegra_vgpu_as_share_params *p = &msg.params.as_share;
-        struct rb_node *node;
+        struct nvgpu_rbtree_node *node = NULL;
         int err;
 
         gk20a_dbg_fn("");
@@ -211,12 +211,11 @@ static void vgpu_vm_remove_support(struct vm_gk20a *vm)
         /* TBD: add a flag here for the unmap code to recognize teardown
          * and short-circuit any otherwise expensive operations. */
 
-        node = rb_first(&vm->mapped_buffers);
+        nvgpu_rbtree_enum_start(0, &node, vm->mapped_buffers);
         while (node) {
-                mapped_buffer =
-                        container_of(node, struct mapped_buffer_node, node);
+                mapped_buffer = mapped_buffer_from_rbtree_node(node);
                 gk20a_vm_unmap_locked(mapped_buffer, NULL);
-                node = rb_first(&vm->mapped_buffers);
+                nvgpu_rbtree_enum_start(0, &node, vm->mapped_buffers);
         }
 
         /* destroy remaining reserved memory areas */
@@ -406,7 +405,7 @@ static int vgpu_vm_alloc_share(struct gk20a_as_share *as_share,
         if (err)
                 goto clean_up_user_allocator;
 
-        vm->mapped_buffers = RB_ROOT;
+        vm->mapped_buffers = NULL;
 
         nvgpu_mutex_init(&vm->update_gmmu_lock);
         kref_init(&vm->ref);