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, 2 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/Makefile b/drivers/gpu/nvgpu/Makefile
index 43a36221..a3372cef 100644
--- a/drivers/gpu/nvgpu/Makefile
+++ b/drivers/gpu/nvgpu/Makefile
@@ -65,7 +65,7 @@ nvgpu-y += \
         os/linux/log.o \
         os/linux/cond.o \
         os/linux/nvgpu_mem.o \
-        os/linux/dma.o \
+        os/linux/linux-dma.o \
         os/linux/driver_common.o \
         os/linux/firmware.o \
         os/linux/thread.o \
@@ -180,6 +180,7 @@ nvgpu-y += \
         common/mm/nvgpu_mem.o \
         common/mm/comptags.o \
         common/mm/mm.o \
+        common/mm/dma.o \
         common/enabled.o \
         common/nvlink.o \
         common/pramin.o \