gpu: nvgpu: Add nvgpu_os_buffer

Add a generic nvgpu_os_buffer type, defined by each OS, to abstract
a "user" buffer. This allows the comptag interface to be used in the
core code.

The end goal of this patch is to allow the OS specific mapping code
to call a generic mapping function that handles most of the mapping
logic. The problem is a lot of the logic involves comptags which are
highly dependent on the operating systems buffer management scheme.
With this, each OS can implement the buffer comptag mechanics
however it wishes without the core MM code caring.

JIRA NVGPU-30
JIRA NVGPU-223

Change-Id: Iaf64bc52e01ef3f262b4f8f9173a84384db7dc3e
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1583986
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 0 insertions, 13 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/dmabuf.h b/drivers/gpu/nvgpu/common/linux/dmabuf.h
index b4b61459..8e6c139b 100644
--- a/drivers/gpu/nvgpu/common/linux/dmabuf.h
+++ b/drivers/gpu/nvgpu/common/linux/dmabuf.h
@@ -48,19 +48,6 @@ struct gk20a_dmabuf_priv {
         u64 buffer_id;
 };
 
-/*
- * These are implemented in common/linux/comptags.c - these are dmabuf related
- * functions though so they are defined here. They cannot be defined in
- * <nvgpu/comptags.h> since that file must be OS agnostic.
- */
-int gk20a_alloc_comptags(struct gk20a *g,
-                         struct device *dev,
-                         struct dma_buf *dmabuf,
-                         struct gk20a_comptag_allocator *allocator,
-                         u32 lines);
-void gk20a_get_comptags(struct device *dev, struct dma_buf *dmabuf,
-                        struct gk20a_comptags *comptags);
-
 struct sg_table *gk20a_mm_pin(struct device *dev, struct dma_buf *dmabuf);
 void gk20a_mm_unpin(struct device *dev, struct dma_buf *dmabuf,
                     struct sg_table *sgt);