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gpu: nvgpu: Implement NVGPU_AS_IOCTL_GET_VA_REGIONS

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Implement NVGPU_AS_IOCTL_GET_VA_REGIONS which returns a list of GPU VA
regions for different page sizes. This is required for the userspace
for safe fixed-address address space allocation.

Bug 1551752

Change-Id: I63ddde30935db2471bec498dae0caa870e89c1a5
Signed-off-by: Sami Kiminki <skiminki@nvidia.com>
Reviewed-on: http://git-master/r/590814
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
This commit is contained in:
Sami Kiminki
2014-10-28 16:55:12 +02:00
committed by Dan Willemsen
parent f97e7036b1
commit cc6ccd2e3f
3 changed files with 82 additions and 1 deletions
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20
include/uapi/linux/nvgpu.h
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@@ -793,6 +793,22 @@ struct nvgpu_as_unmap_buffer_args {
__u64 offset; /* in, byte address */
};
struct nvgpu_as_va_region {
__u64 offset;
__u32 page_size;
__u32 reserved;
__u64 pages;
};
struct nvgpu_as_get_va_regions_args {
__u64 buf_addr; /* Pointer to array of nvgpu_as_va_region:s.
* Ignored if buf_size is 0 */
__u32 buf_size; /* in: userspace buf size (in bytes)
out: kernel buf size (in bytes) */
__u32 reserved;
};
#define NVGPU_AS_IOCTL_BIND_CHANNEL \
_IOWR(NVGPU_AS_IOCTL_MAGIC, 1, struct nvgpu_as_bind_channel_args)
#define NVGPU32_AS_IOCTL_ALLOC_SPACE \
@@ -807,9 +823,11 @@ struct nvgpu_as_unmap_buffer_args {
_IOWR(NVGPU_AS_IOCTL_MAGIC, 6, struct nvgpu_as_alloc_space_args)
#define NVGPU_AS_IOCTL_MAP_BUFFER_EX \
_IOWR(NVGPU_AS_IOCTL_MAGIC, 7, struct nvgpu_as_map_buffer_ex_args)
#define NVGPU_AS_IOCTL_GET_VA_REGIONS \
_IOWR(NVGPU_AS_IOCTL_MAGIC, 8, struct nvgpu_as_get_va_regions_args)
#define NVGPU_AS_IOCTL_LAST \
_IOC_NR(NVGPU_AS_IOCTL_MAP_BUFFER_EX)
_IOC_NR(NVGPU_AS_IOCTL_GET_VA_REGIONS)
#define NVGPU_AS_IOCTL_MAX_ARG_SIZE \
sizeof(struct nvgpu_as_map_buffer_ex_args)