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gpu: nvgpu: refcount ctrl node with tsg open and close

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Since tsg close refers to the ctrl node to revoke the share tokens, need
to ensure that ctrl node remains active until after contained tsgs are
released.

Bug 3946749

Change-Id: I3b514f6d2a041cbf3d517f846f202f956747d726
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2872115
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Sagar Kamble
2023-03-15 11:49:16 +00:00
committed by mobile promotions
parent ac9a59075e
commit dc0dc2e96a
3 changed files with 67 additions and 37 deletions
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31
drivers/gpu/nvgpu/os/linux/ioctl_ctrl.h
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2011-2022, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2011-2023, 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,
@@ -16,9 +16,36 @@
#ifndef __NVGPU_IOCTL_CTRL_H__
#define __NVGPU_IOCTL_CTRL_H__
struct gk20a_ctrl_priv;
struct nvgpu_tsg;
struct gk20a_ctrl_priv {
struct device *dev;
struct gk20a *g;
struct nvgpu_clk_session *clk_session;
struct nvgpu_cdev *cdev;
#ifdef CONFIG_NVGPU_TSG_SHARING
u64 device_instance_id;
u64 tsg_share_token;
struct nvgpu_list_node tsg_share_tokens_list;
struct nvgpu_mutex tokens_lock;
#endif
/**
* This ref is initialized during gk20a_ctrl_dev_open.
* This is ref_get whenever a TSG is opened for a device.
* This is ref_put whenever a TSG is released from a device.
*/
struct nvgpu_ref refcount;
struct nvgpu_list_node list;
struct {
struct vm_area_struct *vma;
bool vma_mapped;
} usermode_vma;
};
void nvgpu_ioctl_ctrl_release(struct nvgpu_ref *ref);
int gk20a_ctrl_dev_open(struct inode *inode, struct file *filp);
int gk20a_ctrl_dev_release(struct inode *inode, struct file *filp);
long gk20a_ctrl_dev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);