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gpu: nvgpu: UAPI specification for TSG sharing
Add below ioctls for TSG share token management: 1. NVGPU_TSG_IOCTL_GET_SHARE_TOKEN 2. NVGPU_TSG_IOCTL_REVOKE_SHARE_TOKEN Update the ioctl NVGPU_GPU_IOCTL_OPEN_TSG to consider the creation of TSG with share token. Bug 3677982 JIRA NVGPU-8681 Change-Id: I436217061bc0e9f6424ea793cf7efbc3368d0817 Signed-off-by: Sami Kiminki <skiminki@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2792078 Tested-by: Sagar Kamble <skamble@nvidia.com> Reviewed-by: Sagar Kamble <skamble@nvidia.com> Reviewed-by: Scott Long <scottl@nvidia.com> Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com> GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
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Sami Kiminki
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@@ -434,9 +434,55 @@ struct nvgpu_alloc_as_args {
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__u32 padding[6];
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};
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/*
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* NVGPU_GPU_IOCTL_OPEN_TSG - create/share TSG ioctl.
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*
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* This IOCTL allocates one of the available TSG for user when called
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* without share token specified. When called with share token specified,
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* fd is created for already allocated TSG for sharing the TSG under
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* different device/CTRL object hierarchies in different processes.
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*
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* Source device is specified in the arguments and target device is
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* implied from the caller. Share token is unique for a TSG.
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*
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* When the TSG is successfully created first time or is opened with share
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* token, the device instance id associated with the CTRL fd will be added
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* to the TSG private data structure as authorized device instance ids.
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* This is used for a security check when creating a TSG share token with
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* nvgpu_tsg_get_share_token.
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*
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* return 0 on success, -1 on error.
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* retval EINVAL if invalid parameters are specified (if TSG_FLAGS_SHARE
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* is set but source_device_instance_id and/or share token
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* are zero or TSG_FLAGS_SHARE is not set but other
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* arguments are non-zero).
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* retval EINVAL if share token doesn't exist or is expired.
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*/
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/*
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* Specify that the newly created TSG fd will map to existing hardware
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* TSG resources.
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*/
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#define NVGPU_GPU_IOCTL_OPEN_TSG_FLAGS_SHARE ((__u32)1U << 0U)
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/* Arguments for NVGPU_GPU_IOCTL_OPEN_TSG */
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struct nvgpu_gpu_open_tsg_args {
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__u32 tsg_fd; /* out, tsg fd */
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__u32 reserved; /* must be zero */
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__u32 tsg_fd; /* out: tsg fd */
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__u32 flags; /* in: NVGPU_GPU_IOCTL_OPEN_TSG_FLAGS_* */
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__u64 source_device_instance_id; /*
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* in: source device instance id
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* that created the token. Ignored when
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* NVGPU_GPU_IOCTL_OPEN_TSG_FLAGS_SHARE
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* is unset.
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*/
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__u64 share_token; /*
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* in: share token obtained from
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* NVGPU_TSG_IOCTL_GET_SHARE_TOKEN. Ignored when
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* NVGPU_GPU_IOCTL_OPEN_TSG_FLAGS_SHARE
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* is unset.
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*/
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};
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struct nvgpu_gpu_get_tpc_masks_args {
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@@ -193,6 +193,77 @@ struct nvgpu_tsg_delete_subcontext_args {
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__u32 reserved;
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};
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/*
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* NVGPU_TSG_IOCTL_GET_SHARE_TOKEN - get TSG share token ioctl.
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*
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* This IOCTL creates a TSG share token. The TSG share token may be
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* specified when opening new TSG fds with NVGPU_GPU_IOCTL_OPEN_TSG.
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* In this case, the underlying HW TSG will be shared.
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*
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* The source_device_instance_id is checked to be authorized while
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* creating share token.
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*
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* TBD: TSG share tokens have an expiration time. This is controlled
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* by /sys/kernel/debug/<gpu>/tsg_share_token_timeout_ms. The default
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* timeout is 30000 ms on silicon platforms and 0 (= no timeout) on
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* pre-silicon platforms.
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*
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* When the TSG is closed, all share tokens on the TSG will be
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* invalidated. Share token can also be invalidated by calling
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* the ioctl NVGPU_TSG_IOCTL_REVOKE_SHARE_TOKEN.
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*
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* When creating a TSG fd with share token, it is ensured that
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* target_device_instance_id specified here matches with the
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* device instance id that is used to call the ioctl
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* NVGPU_GPU_IOCTL_OPEN_TSG. This will secure the sharing of
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* the TSG within trusted parties.
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*
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* Note: share token is unique in the context of the source and
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* target device instance ids for a TSG.
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*
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* return 0 on success, -1 on error.
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* retval EINVAL if invalid parameters are specified.
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* (if any of the device id argument is zero or
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* unauthorized device).
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*/
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/* Arguments for NVGPU_TSG_IOCTL_GET_SHARE_TOKEN */
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struct nvgpu_tsg_get_share_token_args {
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/* in: Source (exporter) device id */
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__u64 source_device_instance_id;
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/* in: Target (importer) device id */
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__u64 target_device_instance_id;
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/* out: Share token */
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__u64 share_token;
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};
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/*
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* NVGPU_TSG_IOCTL_REVOKE_SHARE_TOKEN - revoke TSG share token ioctl.
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*
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* This IOCTL revokes a TSG share token. It is intended to be called
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* whe the share token data exchange with the other end point is
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* unsuccessful.
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*
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* return 0 on success, -1 on error.
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* retval EINVAL if invalid parameters are specified.
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* (if any of the argument is zero or unauthorized device).
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* retval EINVAL if share token doesn't exist or is expired.
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*/
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/* Arguments for NVGPU_TSG_IOCTL_REVOKE_SHARE_TOKEN */
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struct nvgpu_tsg_revoke_share_token_args {
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/* in: Source (exporter) device id */
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__u64 source_device_instance_id;
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/* in: Target (importer) device id */
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__u64 target_device_instance_id;
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/* in: Share token */
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__u64 share_token;
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};
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#define NVGPU_TSG_IOCTL_BIND_CHANNEL \
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_IOW(NVGPU_TSG_IOCTL_MAGIC, 1, int)
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#define NVGPU_TSG_IOCTL_UNBIND_CHANNEL \
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@@ -237,11 +308,17 @@ struct nvgpu_tsg_delete_subcontext_args {
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#define NVGPU_TSG_IOCTL_DELETE_SUBCONTEXT \
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_IOW(NVGPU_TSG_IOCTL_MAGIC, 19, \
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struct nvgpu_tsg_delete_subcontext_args)
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#define NVGPU_TSG_IOCTL_GET_SHARE_TOKEN \
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_IOWR(NVGPU_TSG_IOCTL_MAGIC, 20, \
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struct nvgpu_tsg_get_share_token_args)
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#define NVGPU_TSG_IOCTL_REVOKE_SHARE_TOKEN \
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_IOW(NVGPU_TSG_IOCTL_MAGIC, 21, \
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struct nvgpu_tsg_revoke_share_token_args)
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#define NVGPU_TSG_IOCTL_MAX_ARG_SIZE \
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sizeof(struct nvgpu_tsg_bind_scheduling_domain_args)
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#define NVGPU_TSG_IOCTL_LAST \
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_IOC_NR(NVGPU_TSG_IOCTL_DELETE_SUBCONTEXT)
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_IOC_NR(NVGPU_TSG_IOCTL_REVOKE_SHARE_TOKEN)
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/*
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* /dev/nvhost-dbg-gpu device
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