gpu: nvpgu: Rename Linux specific vidmem code

Rename os/linux/vidmem.c to os/linux/dmabuf_vidmem.c. The code is
mainly dealing with interfacing with Linux dmabuf framework and its
responsibilities got confused with common/mm/vidmem.c.

Also move the header include/nvgpu/linux/vidmem.h to
os/linux/dmabuf_vidmem.h. It does not expose any interface to outside
Linux code.

Change-Id: I2cb1057a8934d5cb5c5860023aa12f8f048a6684
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1768261
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

drivers/gpu/nvgpu/Makefile

@@ -66,7 +66,7 @@ nvgpu-y += \
 	os/linux/dt.o
 
 nvgpu-$(CONFIG_GK20A_VIDMEM) += \
-	os/linux/vidmem.o
+	os/linux/dmabuf_vidmem.o
 
 nvgpu-$(CONFIG_DEBUG_FS) += \
 	os/linux/debug.o \

drivers/gpu/nvgpu/os/linux/dma.c

@@ -27,12 +27,12 @@
 #include <nvgpu/vidmem.h>
 
 #include <nvgpu/linux/dma.h>
-#include <nvgpu/linux/vidmem.h>
 
 #include "gk20a/gk20a.h"
 
 #include "platform_gk20a.h"
 #include "os_linux.h"
+#include "dmabuf_vidmem.h"
 
 #ifdef __DMA_ATTRS_LONGS
 #define NVGPU_DEFINE_DMA_ATTRS(x)                                     \

drivers/gpu/nvgpu/os/linux/dmabuf.c

@@ -22,13 +22,13 @@
 #include <nvgpu/enabled.h>
 
 #include <nvgpu/linux/vm.h>
-#include <nvgpu/linux/vidmem.h>
 
 #include "gk20a/gk20a.h"
 
 #include "platform_gk20a.h"
 #include "dmabuf.h"
 #include "os_linux.h"
+#include "dmabuf_vidmem.h"
 
 static void gk20a_mm_delete_priv(void *_priv)
 {

drivers/gpu/nvgpu/os/linux/dmabuf_vidmem.c

@@ -30,10 +30,10 @@
 
 #include <nvgpu/linux/vm.h>
 #include <nvgpu/linux/dma.h>
-#include <nvgpu/linux/vidmem.h>
 
 #include "gk20a/gk20a.h"
 #include "gk20a/mm_gk20a.h"
+#include "dmabuf_vidmem.h"
 
 bool nvgpu_addr_is_vidmem_page_alloc(u64 addr)
 {

drivers/gpu/nvgpu/os/linux/dmabuf_vidmem.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2017-2018, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -14,14 +14,15 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef __NVGPU_LINUX_VIDMEM_H__
+#ifndef __NVGPU_LINUX_DMABUF_VIDMEM_H__
-#define __NVGPU_LINUX_VIDMEM_H__
+#define __NVGPU_LINUX_DMABUF_VIDMEM_H__
 
 #include <nvgpu/types.h>
 
 struct dma_buf;
 
 struct gk20a;
+struct scatterlist;
 
 #ifdef CONFIG_GK20A_VIDMEM
 

drivers/gpu/nvgpu/os/linux/ioctl_ctrl.c

@@ -30,8 +30,6 @@
 #include <nvgpu/enabled.h>
 #include <nvgpu/sizes.h>
 
-#include <nvgpu/linux/vidmem.h>
-
 #include "ioctl_ctrl.h"
 #include "ioctl_dbg.h"
 #include "ioctl_as.h"
@@ -44,6 +42,7 @@
 #include "os_linux.h"
 #include "dmabuf.h"
 #include "channel.h"
+#include "dmabuf_vidmem.h"
 
 #define HZ_TO_MHZ(a) ((a > 0xF414F9CD7ULL) ? 0xffff : (a >> 32) ? \
 	(u32) ((a * 0x10C8ULL) >> 32) : (u16) ((u32) a/MHZ))

drivers/gpu/nvgpu/os/linux/ioctl_dbg.c

@@ -30,7 +30,6 @@
 #include <nvgpu/atomic.h>
 #include <nvgpu/cond.h>
 
-#include <nvgpu/linux/vidmem.h>
 #include <nvgpu/linux/vm.h>
 
 #include "gk20a/gk20a.h"
@@ -40,6 +39,7 @@
 #include "os_linux.h"
 #include "platform_gk20a.h"
 #include "ioctl_dbg.h"
+#include "dmabuf_vidmem.h"
 
 struct dbg_session_gk20a_linux {
 	struct device	*dev;

drivers/gpu/nvgpu/os/linux/nvgpu_mem.c

@@ -25,12 +25,12 @@
 #include <nvgpu/vidmem.h>
 
 #include <nvgpu/linux/dma.h>
-#include <nvgpu/linux/vidmem.h>
 
 #include <linux/vmalloc.h>
 #include <linux/dma-mapping.h>
 
 #include "os_linux.h"
+#include "dmabuf_vidmem.h"
 
 #include "gk20a/gk20a.h"
 #include "gk20a/mm_gk20a.h"

drivers/gpu/nvgpu/os/linux/vm.c

@@ -27,7 +27,6 @@
 #include <nvgpu/vidmem.h>
 
 #include <nvgpu/linux/vm.h>
-#include <nvgpu/linux/vidmem.h>
 #include <nvgpu/linux/nvgpu_mem.h>
 
 #include "gk20a/gk20a.h"
@@ -36,6 +35,7 @@
 #include "platform_gk20a.h"
 #include "os_linux.h"
 #include "dmabuf.h"
+#include "dmabuf_vidmem.h"
 
 static u32 nvgpu_vm_translate_linux_flags(struct gk20a *g, u32 flags)
 {