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>

8 files changed, 85 insertions, 8 deletions

diff --git a/drivers/gpu/nvgpu/os/linux/dma.c b/drivers/gpu/nvgpu/os/linux/dma.c
index 6f17e284..86a17a7e 100644
--- a/drivers/gpu/nvgpu/os/linux/dma.c
+++ b/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)                                     \
diff --git a/drivers/gpu/nvgpu/os/linux/dmabuf.c b/drivers/gpu/nvgpu/os/linux/dmabuf.c
index 129739f0..6f07e88a 100644
--- a/drivers/gpu/nvgpu/os/linux/dmabuf.c
+++ b/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)
 {
diff --git a/drivers/gpu/nvgpu/os/linux/vidmem.c b/drivers/gpu/nvgpu/os/linux/dmabuf_vidmem.c
index df1a905d..572c2b0f 100644
--- a/drivers/gpu/nvgpu/os/linux/vidmem.c
+++ b/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)
 {
diff --git a/drivers/gpu/nvgpu/os/linux/dmabuf_vidmem.h b/drivers/gpu/nvgpu/os/linux/dmabuf_vidmem.h
new file mode 100644
index 00000000..977fd78b
--- /dev/null
+++ b/drivers/gpu/nvgpu/os/linux/dmabuf_vidmem.h
@@ -0,0 +1,78 @@
+/*
+ * 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,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __NVGPU_LINUX_DMABUF_VIDMEM_H__
+#define __NVGPU_LINUX_DMABUF_VIDMEM_H__
+
+#include <nvgpu/types.h>
+
+struct dma_buf;
+
+struct gk20a;
+struct scatterlist;
+
+#ifdef CONFIG_GK20A_VIDMEM
+
+struct gk20a *nvgpu_vidmem_buf_owner(struct dma_buf *dmabuf);
+int nvgpu_vidmem_export_linux(struct gk20a *g, size_t bytes);
+
+void nvgpu_vidmem_set_page_alloc(struct scatterlist *sgl, u64 addr);
+struct nvgpu_page_alloc *nvgpu_vidmem_get_page_alloc(struct scatterlist *sgl);
+
+int nvgpu_vidmem_buf_access_memory(struct gk20a *g, struct dma_buf *dmabuf,
+                void *buffer, u64 offset, u64 size, u32 cmd);
+
+#else /* !CONFIG_GK20A_VIDMEM */
+
+static inline struct gk20a *nvgpu_vidmem_buf_owner(struct dma_buf *dmabuf)
+{
+        return NULL;
+}
+
+static inline int nvgpu_vidmem_export_linux(struct gk20a *g, size_t bytes)
+{
+        return -ENOSYS;
+}
+
+static inline void nvgpu_vidmem_set_page_alloc(struct scatterlist *sgl,
+                                               u64 addr)
+{
+}
+
+static inline struct nvgpu_page_alloc *nvgpu_vidmem_get_page_alloc(
+        struct scatterlist *sgl)
+{
+        return NULL;
+}
+
+static inline int nvgpu_vidmem_buf_access_memory(struct gk20a *g,
+                                                 struct dma_buf *dmabuf,
+                                                 void *buffer, u64 offset,
+                                                 u64 size, u32 cmd)
+{
+        return -ENOSYS;
+}
+
+#endif
+
+
+struct nvgpu_vidmem_linux {
+        struct dma_buf  *dmabuf;
+        void            *dmabuf_priv;
+        void            (*dmabuf_priv_delete)(void *);
+};
+
+#endif
diff --git a/drivers/gpu/nvgpu/os/linux/ioctl_ctrl.c b/drivers/gpu/nvgpu/os/linux/ioctl_ctrl.c
index f9ad8082..17f1e923 100644
--- a/drivers/gpu/nvgpu/os/linux/ioctl_ctrl.c
+++ b/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))
diff --git a/drivers/gpu/nvgpu/os/linux/ioctl_dbg.c b/drivers/gpu/nvgpu/os/linux/ioctl_dbg.c
index 3156837b..9c7608e9 100644
--- a/drivers/gpu/nvgpu/os/linux/ioctl_dbg.c
+++ b/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;
diff --git a/drivers/gpu/nvgpu/os/linux/nvgpu_mem.c b/drivers/gpu/nvgpu/os/linux/nvgpu_mem.c
index aa8fcd84..4fc95db9 100644
--- a/drivers/gpu/nvgpu/os/linux/nvgpu_mem.c
+++ b/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"
diff --git a/drivers/gpu/nvgpu/os/linux/vm.c b/drivers/gpu/nvgpu/os/linux/vm.c
index eb9ca8fd..2b5ed103 100644
--- a/drivers/gpu/nvgpu/os/linux/vm.c
+++ b/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)
 {