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gpu: nvgpu: add ioctl for querying memory state

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Add NVGPU_GPU_IOCTL_GET_MEMORY_STATE to read the amount of free
device-local video memory, if applicable.

Some reserved fields are added to support different types of queries in
the future (e.g. context-local free amount).

Bug 1787771
Bug 200233138

Change-Id: Id5ffd02ad4d6ed3a6dc196541938573c27b340ac
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/1223762
(cherry picked from commit 96221d96c7972c6387944603e974f7639d6dbe70)
Reviewed-on: http://git-master/r/1235980
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Konsta Holtta
2016-09-20 13:34:52 +03:00
committed by mobile promotions
parent 4d07572c82
commit fa6ab1943e
4 changed files with 60 additions and 1 deletions
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17
include/uapi/linux/nvgpu.h
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@@ -510,6 +510,18 @@ struct nvgpu_gpu_alloc_vidmem_args {
};
};
struct nvgpu_gpu_get_memory_state_args {
/*
* Current free space for this device; may change even when any
* kernel-managed metadata (e.g., page tables or channels) is allocated
* or freed. For an idle gpu, an allocation of this size would succeed.
*/
__u64 total_free_bytes;
/* For future use; must be set to 0. */
__u64 reserved[4];
};
#define NVGPU_GPU_IOCTL_ZCULL_GET_CTX_SIZE \
_IOR(NVGPU_GPU_IOCTL_MAGIC, 1, struct nvgpu_gpu_zcull_get_ctx_size_args)
#define NVGPU_GPU_IOCTL_ZCULL_GET_INFO \
@@ -568,8 +580,11 @@ struct nvgpu_gpu_alloc_vidmem_args {
#define NVGPU_GPU_IOCTL_ALLOC_VIDMEM \
_IOWR(NVGPU_GPU_IOCTL_MAGIC, 27, \
struct nvgpu_gpu_alloc_vidmem_args)
#define NVGPU_GPU_IOCTL_GET_MEMORY_STATE \
_IOWR(NVGPU_GPU_IOCTL_MAGIC, 33, \
struct nvgpu_gpu_get_memory_state_args)
#define NVGPU_GPU_IOCTL_LAST \
_IOC_NR(NVGPU_GPU_IOCTL_ALLOC_VIDMEM)
_IOC_NR(NVGPU_GPU_IOCTL_GET_MEMORY_STATE)
#define NVGPU_GPU_IOCTL_MAX_ARG_SIZE \
sizeof(struct nvgpu_gpu_get_cpu_time_correlation_info_args)