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gpu: nvgpu: add support for nvs control_fifo

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Add a device node for management of nvs control fifo buffers for
scheduling domains. The current design consists of a master structure
struct nvgpu_nvs_domain_sched_ctrl for management of users as well
as control queues. Initially all users are added as non-exclusive users.

Subsequent changes will add support for IOCTLS to manage opening of
Send/Receive and Event buffers, querying characteristics etc.

In subsequent changes, a user that tries to open a Send/Receive queue
will first try to reserve itself as an exclusive user and only if that
succeeds can proceed with creation of both Send/Receive queues.

Exclusive users will be reset to non-exclusive users just before they
close their device node handle.

Jira NVGPU-8128

Change-Id: I15a83f70cd49c685510a9fd5ea4476ebb3544378
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2691404
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
GVS: Gerrit_Virtual_Submit
This commit is contained in:
Debarshi Dutta
2022-06-17 10:29:09 +05:30
committed by mobile promotions
parent cce488d87e
commit 62c03dfaef
12 changed files with 365 additions and 2 deletions
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2
drivers/gpu/nvgpu/os/linux/ioctl_ctrl.c
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@@ -307,6 +307,8 @@ static struct nvgpu_flags_mapping flags_mapping[] = {
NVGPU_SUPPORT_BUFFER_METADATA},
{NVGPU_GPU_FLAGS_SUPPORT_NVS,
NVGPU_SUPPORT_NVS},
{NVGPU_GPU_FLAGS_SUPPORT_NVS_SCHED_CTRL_FIFO,
NVGPU_SUPPORT_NVS_CTRL_FIFO},
};
static u64 nvgpu_ctrl_ioctl_gpu_characteristics_flags(struct gk20a *g)