gpu: nvgpu: Move dma_buf usage from mm_gk20a.c

Move most of the dma_buf usage present in the mm_gk20a.c code
out to Linux specific code and some commom/mm code. There's
two primary groups of code:

  1. dma_buf priv field code (for holding comptag data)
  2. Comptag usage that relies on dma_buf pointers

For (1) the dma_buf code was simply moved to common/linux/dmabuf.c
since most of this code is clearly Linux specific.

The comptag code was a bit more complicated since there is two
parts to the comptag code. Firstly there's the code that manages
the comptag memory. This is essentially a simple allocator. This
was moved to common/mm/comptags.c since it can be shared across
all chips. The second set of code is moved to
common/linux/comptags.c since it is the interface between dma_bufs
and the comptag memory.

Two other fixes were done as well:

 - Add struct gk20a to the comptag allocator init so that
   the proper nvgpu_vzalloc() function could be used.
 - Add necessary includes to common/linux/vm_priv.h.

JIRA NVGPU-30
JIRA NVGPU-138

Change-Id: I96c57f2763e5ebe18a2f2ee4b33e0e1a2597848c
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1566628
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 0 insertions, 5 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/vm_priv.h b/drivers/gpu/nvgpu/common/linux/vm_priv.h
index 1eadf1d0..fa173d59 100644
--- a/drivers/gpu/nvgpu/common/linux/vm_priv.h
+++ b/drivers/gpu/nvgpu/common/linux/vm_priv.h
@@ -102,10 +102,5 @@ int setup_buffer_kind_and_compression(struct vm_gk20a *vm,
                                       u32 flags,
                                       struct buffer_attrs *bfr,
                                       enum gmmu_pgsz_gk20a pgsz_idx);
-int gk20a_alloc_comptags(struct gk20a *g,
-                         struct device *dev,
-                         struct dma_buf *dmabuf,
-                         struct gk20a_comptag_allocator *allocator,
-                         u32 lines);
 
 #endif