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gpu: nvgpu: add support for event queue observers

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Add support for accessing Event Queue for non-exclusive
users. Allows, non-exclusive users to open Event Queues
before exclusive users. Non-Exclusive users can only
use the Event Queue in a read-only mode.

Add VM_SHARED for Event Queues across all users instead of just
Read-Only users. Event queues are shared with multiple processes
and as such require VM_SHARED across all users(exclusive and
observers).

Jira NVGPU-8608

Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Change-Id: Id9733c2511ded6f06dd9feea880005bdc92e51a0
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2745083
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
GVS: Gerrit_Virtual_Submit
This commit is contained in:
Debarshi Dutta
2022-07-14 13:04:43 +05:30
committed by mobile promotions
parent 1f9fbc85fe
commit 3d95f2b803
5 changed files with 111 additions and 40 deletions
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7
drivers/gpu/nvgpu/common/nvs/nvs_sched_ctrl.c
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@@ -340,15 +340,22 @@ void nvgpu_nvs_ctrl_fifo_unlock_queues(struct gk20a *g)
nvgpu_mutex_release(&sched_ctrl->queues.queue_lock);
}
bool nvgpu_nvs_ctrl_fifo_queue_has_subscribed_users(struct nvgpu_nvs_ctrl_queue *queue)
{
return queue->ref != 0;
}
void nvgpu_nvs_ctrl_fifo_user_subscribe_queue(struct nvs_domain_ctrl_fifo_user *user,
struct nvgpu_nvs_ctrl_queue *queue)
{
user->active_used_queues |= queue->mask;
queue->ref++;
}
void nvgpu_nvs_ctrl_fifo_user_unsubscribe_queue(struct nvs_domain_ctrl_fifo_user *user,
struct nvgpu_nvs_ctrl_queue *queue)
{
user->active_used_queues &= ~queue->mask;
queue->ref--;
}
bool nvgpu_nvs_ctrl_fifo_user_is_subscribed_to_queue(struct nvs_domain_ctrl_fifo_user *user,
struct nvgpu_nvs_ctrl_queue *queue)