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gpu: nvgpu: UAPI specification for VEID alloc/free

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nvgpu will be allocating and freeing the subcontext VEIDs for
sharing the TSG across processes.

Add interfaces for allocating and freeing the VEIDs.

Bug 3677982
JIRA NVGPU-8681

Change-Id: I48b00609147e2696404c3aad14dae9bb940d04d4
Signed-off-by: Sami Kiminki <skiminki@nvidia.com>
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2497716
Reviewed-by: Scott Long <scottl@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Sami Kiminki
2021-03-12 13:10:09 +02:00
committed by mobile promotions
parent 7138e7e673
commit 9233886943
1 changed files with 70 additions and 1 deletions
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71
include/uapi/linux/nvgpu.h
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@@ -130,6 +130,69 @@ struct nvgpu_tsg_set_l2_sector_promotion_args {
__u32 reserved;
};
/*
* NVGPU_TSG_IOCTL_CREATE_SUBCONTEXT - create a subcontext within a TSG.
*
* This IOCTL creates a subcontext of specified type within TSG if available
* and returns VEID for it. Subcontext is associated with the user supplied
* address space.
*
* return 0 on success, -1 on error.
* retval EINVAL if invalid parameters are specified.
* retval ENOSPC if subcontext of specified type can't be allocated.
*/
/* Subcontext types */
/*
* Synchronous subcontext. Subcontext of this type may hold the
* graphics channel, and multiple copy engine and compute channels.
*/
#define NVGPU_TSG_SUBCONTEXT_TYPE_SYNC (0x0U)
/*
* Asynchronous subcontext. Asynchronous subcontext is for compute
* and copy engine channels only.
*/
#define NVGPU_TSG_SUBCONTEXT_TYPE_ASYNC (0x1U)
/* Arguments for NVGPU_TSG_IOCTL_CREATE_SUBCONTEXT */
struct nvgpu_tsg_create_subcontext_args {
/* in: subcontext type */
__u32 type;
/* in: address space fd */
__s32 as_fd;
/*
* out: VEID for the subcontext
* This is HW specific constant. For Volta+ chips (up to T234
* Legacy mode), the HW-specific range is [0..63]. Of these,
* 0th subcontext is SYNC subcontext and remaining are
* ASYNC subcontexts.
* For SMC case, less number of VEIDs are supported per GPU
* instance. This value is SMC engine relative VEID.
*/
__u32 veid;
__u32 reserved;
};
/*
* NVGPU_TSG_IOCTL_DELETE_SUBCONTEXT - delete a subcontext within a TSG.
*
* This IOCTL deletes a subcontext with specified subcontext id.
*
* return 0 on success, -1 on error.
* retval EINVAL if invalid parameters are specified.
*/
/* Arguments for NVGPU_TSG_IOCTL_DELETE_SUBCONTEXT */
struct nvgpu_tsg_delete_subcontext_args {
/* in: VEID for the subcontext */
__u32 veid;
__u32 reserved;
};
#define NVGPU_TSG_IOCTL_BIND_CHANNEL \
_IOW(NVGPU_TSG_IOCTL_MAGIC, 1, int)
#define NVGPU_TSG_IOCTL_UNBIND_CHANNEL \
@@ -168,11 +231,17 @@ struct nvgpu_tsg_set_l2_sector_promotion_args {
#define NVGPU_TSG_IOCTL_READ_ALL_SM_ERROR_STATES \
_IOWR(NVGPU_TSG_IOCTL_MAGIC, 17, \
struct nvgpu_tsg_read_all_sm_error_state_args)
#define NVGPU_TSG_IOCTL_CREATE_SUBCONTEXT \
_IOWR(NVGPU_TSG_IOCTL_MAGIC, 18, \
struct nvgpu_tsg_create_subcontext_args)
#define NVGPU_TSG_IOCTL_DELETE_SUBCONTEXT \
_IOW(NVGPU_TSG_IOCTL_MAGIC, 19, \
struct nvgpu_tsg_delete_subcontext_args)
#define NVGPU_TSG_IOCTL_MAX_ARG_SIZE \
sizeof(struct nvgpu_tsg_bind_scheduling_domain_args)
#define NVGPU_TSG_IOCTL_LAST \
_IOC_NR(NVGPU_TSG_IOCTL_READ_ALL_SM_ERROR_STATES)
_IOC_NR(NVGPU_TSG_IOCTL_DELETE_SUBCONTEXT)
/*
* /dev/nvhost-dbg-gpu device