gpu-paging: Initial working implementation

Supports synchronous page out or in of a specific buffer.

Includes fast reverse struct mapped_buf lookup.

Requires initial set of changes to nvmap as well.

1 files changed, 9 insertions, 1 deletions

diff --git a/include/uapi/linux/nvgpu.h b/include/uapi/linux/nvgpu.h
index 873e787f..0138b720 100644
--- a/include/uapi/linux/nvgpu.h
+++ b/include/uapi/linux/nvgpu.h
@@ -2176,6 +2176,10 @@ struct nvgpu_as_get_sync_ro_map_args {
         __u32 padding;
 };
 
+struct nvgpu_as_swap_buffer_args {
+        __u32 dmabuf_fd;        /* in */
+};
+
 #define NVGPU_AS_IOCTL_BIND_CHANNEL \
         _IOWR(NVGPU_AS_IOCTL_MAGIC, 1, struct nvgpu_as_bind_channel_args)
 #define NVGPU32_AS_IOCTL_ALLOC_SPACE \
@@ -2198,9 +2202,13 @@ struct nvgpu_as_get_sync_ro_map_args {
         _IOWR(NVGPU_AS_IOCTL_MAGIC, 11, struct nvgpu_as_map_buffer_batch_args)
 #define NVGPU_AS_IOCTL_GET_SYNC_RO_MAP  \
         _IOR(NVGPU_AS_IOCTL_MAGIC,  12, struct nvgpu_as_get_sync_ro_map_args)
+#define NVGPU_AS_IOCTL_WRITE_SWAP_BUFFER        \
+        _IOW(NVGPU_AS_IOCTL_MAGIC,  13, struct nvgpu_as_swap_buffer_args)
+#define NVGPU_AS_IOCTL_READ_SWAP_BUFFER \
+        _IOW(NVGPU_AS_IOCTL_MAGIC,  14, struct nvgpu_as_swap_buffer_args)
 
 #define NVGPU_AS_IOCTL_LAST            \
-        _IOC_NR(NVGPU_AS_IOCTL_GET_SYNC_RO_MAP)
+        _IOC_NR(NVGPU_AS_IOCTL_READ_SWAP_BUFFER)
 #define NVGPU_AS_IOCTL_MAX_ARG_SIZE     \
         sizeof(struct nvgpu_as_map_buffer_ex_args)