gpu: nvgpu: Refactoring nvgpu_vm functions

Refactor the last nvgpu_vm functions from the mm_gk20a.c code. This
removes some usages of dma_buf from the mm_gk20a.c code, too, which
helps make mm_gk20a.c less Linux specific.

Also delete some header files that are no longer necessary in
gk20a/mm_gk20a.c which are Linux specific. The mm_gk20a.c code is now
quite close to being Linux free.

JIRA NVGPU-30
JIRA NVGPU-138

Change-Id: I72b370bd85a7b029768b0fb4827d6abba42007c3
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1566629
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/gpu/nvgpu/include/nvgpu/vm.h b/drivers/gpu/nvgpu/include/nvgpu/vm.h
index f8868065..8c56461c 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/vm.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/vm.h
@@ -31,9 +31,10 @@
 #include <nvgpu/nvgpu_mem.h>
 #include <nvgpu/allocator.h>
 
+struct dma_buf;
+
 struct vm_gk20a;
 struct nvgpu_vm_area;
-struct buffer_attrs;
 struct gk20a_comptag_allocator;
 
 /**
@@ -212,6 +213,7 @@ int nvgpu_vm_unmap_buffer(struct vm_gk20a *vm, u64 offset,
 
 void nvgpu_vm_unmap_locked(struct nvgpu_mapped_buf *mapped_buffer,
                            struct vm_gk20a_mapping_batch *batch);
+void nvgpu_vm_unmap_locked_ref(struct nvgpu_ref *ref);
 
 /*
  * These all require the VM update lock to be held.
@@ -223,9 +225,6 @@ struct nvgpu_mapped_buf *__nvgpu_vm_find_mapped_buf_range(
 struct nvgpu_mapped_buf *__nvgpu_vm_find_mapped_buf_less_than(
         struct vm_gk20a *vm, u64 addr);
 
-int nvgpu_vm_find_buf(struct vm_gk20a *vm, u64 gpu_va,
-                      struct dma_buf **dmabuf,
-                      u64 *offset);
 int nvgpu_insert_mapped_buf(struct vm_gk20a *vm,
                             struct nvgpu_mapped_buf *mapped_buffer);
 void nvgpu_remove_mapped_buf(struct vm_gk20a *vm,