mirror of
git://nv-tegra.nvidia.com/linux-nvgpu.git
synced 2025-12-22 09:12:24 +03:00
3d95f2b803
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
75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
/*
|
|
* Copyright (c) 2022, NVIDIA CORPORATION. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef NVGPU_DMABUF_NVS_H
|
|
#define NVGPU_DMABUF_NVS_H
|
|
|
|
#include <nvgpu/types.h>
|
|
#include <nvgpu/list.h>
|
|
|
|
struct dma_buf;
|
|
struct gk20a;
|
|
|
|
struct nvgpu_nvs_linux_buf_priv {
|
|
/* This is used to temporarily contain the dmabuf for handling failure */
|
|
struct dma_buf *dmabuf_temp;
|
|
bool read_only;
|
|
u32 mapped_ref;
|
|
|
|
struct nvgpu_list_node list_mapped_user_vmas;
|
|
};
|
|
|
|
struct nvgpu_nvs_domain_ctrl_fifo_user_vma {
|
|
bool read_only;
|
|
struct nvgpu_nvs_ctrl_queue *buf;
|
|
struct vm_area_struct *vma;
|
|
struct nvgpu_list_node node;
|
|
};
|
|
|
|
int nvgpu_nvs_get_buf(struct gk20a *g, struct nvgpu_nvs_ctrl_queue *buf,
|
|
bool read_only);
|
|
|
|
/**
|
|
* @brief Construct a buffer for use as a shared message passing
|
|
* queue between user and backend scheduler. Function is
|
|
* not safe from concurrent access by multiple external
|
|
* users. Must be invoked between the calls of
|
|
* nvgpu_nvs_ctrl_fifo_lock_queues() and
|
|
* nvgpu_nvs_ctrl_fifo_unlock_queues().
|
|
*
|
|
* @param g instance of struct gk20a.
|
|
* @param buf instance of struct nvgpu_nvs_ctrl_queue to contain
|
|
* the constructed buffer metadata.
|
|
* @param bytes size of buffer requested.
|
|
* @param mask Mask of queue requested.
|
|
* @param read_only Indicates whether a read-only buffer is requested.
|
|
* @return int 0 on success, else fail.
|
|
*/
|
|
int nvgpu_nvs_alloc_and_get_buf(struct gk20a *g, struct nvgpu_nvs_ctrl_queue *buf,
|
|
size_t bytes, u8 mask, bool read_only);
|
|
|
|
/**
|
|
* @brief Check whether user mappings exist for this buffer.
|
|
*
|
|
* @param g instance of struct gk20a.
|
|
* @param buf instance of struct nvgpu_nvs_ctrl_queue.
|
|
* @return true User mappings exist.
|
|
* @return false User mappings doesn't exist.
|
|
*/
|
|
bool nvgpu_nvs_buf_linux_is_mapped(struct gk20a *g, struct nvgpu_nvs_ctrl_queue *buf);
|
|
|
|
#endif /* NVGPU_DMABUF_NVS_H */
|