gpu: nvgpu: Move common DMA code to common/mm

This migrates the common DMA code (os agnostic) to the
common directory. This new unit will be the common DMA
allocator that lets users allocate SYSMEM, VIDMEM, or
either. Other units will be responsible for actually
handling the mechanics of allocating VIDMEM or SYSMEM.

Also update the names of the DMA related files so that
tmake doesn't complain about duplicate C file names. To
do this call the common DMA file dma.c and prepend the
OS to the other DMA files. So now we have:

  common/mm/dma.c
  os/posix/posix-dma.c
  os/linux/linux-dma.c

JIRA NVGPU-990

Change-Id: I22d2d41803ad89be7d9c28f87864ce4fedf10836
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1799807
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/include/nvgpu/dma.h b/drivers/gpu/nvgpu/include/nvgpu/dma.h
index d83346a3..f6f264cf 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/dma.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/dma.h
@@ -352,4 +352,10 @@ int nvgpu_dma_alloc_map_flags_vid(struct vm_gk20a *vm, unsigned long flags,
  */
 void nvgpu_dma_unmap_free(struct vm_gk20a *vm, struct nvgpu_mem *mem);
 
+/*
+ * Don't use these directly. Instead use nvgpu_dma_free().
+ */
+void nvgpu_dma_free_sys(struct gk20a *g, struct nvgpu_mem *mem);
+void nvgpu_dma_free_vid(struct gk20a *g, struct nvgpu_mem *mem);
+
 #endif