gpu: nvgpu: Move DMA API to dma.h

Make an nvgpu DMA API include file so that the intricacies of the
Linux DMA API can be hidden from the calling code.

Also document the nvgpu DMA API.

JIRA NVGPU-12

Change-Id: I7578e4c726ad46344b7921179d95861858e9a27e
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1323326
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

4 files changed, 7 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gp10b/fifo_gp10b.c b/drivers/gpu/nvgpu/gp10b/fifo_gp10b.c
index a7e77232..b305b895 100644
--- a/drivers/gpu/nvgpu/gp10b/fifo_gp10b.c
+++ b/drivers/gpu/nvgpu/gp10b/fifo_gp10b.c
@@ -15,6 +15,8 @@
 
 #include <linux/delay.h>
 
+#include <nvgpu/dma.h>
+
 #include "fifo_gp10b.h"
 
 #include "gk20a/gk20a.h"
diff --git a/drivers/gpu/nvgpu/gp10b/gr_gp10b.c b/drivers/gpu/nvgpu/gp10b/gr_gp10b.c
index 8e1517f6..b9367120 100644
--- a/drivers/gpu/nvgpu/gp10b/gr_gp10b.c
+++ b/drivers/gpu/nvgpu/gp10b/gr_gp10b.c
@@ -22,6 +22,7 @@
 
 #include <nvgpu/timers.h>
 #include <nvgpu/kmem.h>
+#include <nvgpu/dma.h>
 
 #include "gk20a/gk20a.h"
 #include "gk20a/gr_gk20a.h"
diff --git a/drivers/gpu/nvgpu/gp10b/mm_gp10b.c b/drivers/gpu/nvgpu/gp10b/mm_gp10b.c
index a0dc8c55..2f894435 100644
--- a/drivers/gpu/nvgpu/gp10b/mm_gp10b.c
+++ b/drivers/gpu/nvgpu/gp10b/mm_gp10b.c
@@ -16,6 +16,8 @@
 #include <linux/pm_runtime.h>
 #include <linux/dma-mapping.h>
 
+#include <nvgpu/dma.h>
+
 #include "gk20a/gk20a.h"
 #include "gm20b/mm_gm20b.h"
 #include "mm_gp10b.h"
diff --git a/drivers/gpu/nvgpu/gp10b/rpfb_gp10b.c b/drivers/gpu/nvgpu/gp10b/rpfb_gp10b.c
index e73bcd8f..bf52b5c9 100644
--- a/drivers/gpu/nvgpu/gp10b/rpfb_gp10b.c
+++ b/drivers/gpu/nvgpu/gp10b/rpfb_gp10b.c
@@ -16,6 +16,8 @@
 #include <linux/pm_runtime.h>
 #include <linux/dma-mapping.h>
 
+#include <nvgpu/dma.h>
+
 #include "gk20a/gk20a.h"
 
 #include "rpfb_gp10b.h"