cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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vmwgfx_fence.h (3948B)

      1/* SPDX-License-Identifier: GPL-2.0 OR MIT */
      2/**************************************************************************
      3 *
      4 * Copyright 2011-2012 VMware, Inc., Palo Alto, CA., USA
      5 *
      6 * Permission is hereby granted, free of charge, to any person obtaining a
      7 * copy of this software and associated documentation files (the
      8 * "Software"), to deal in the Software without restriction, including
      9 * without limitation the rights to use, copy, modify, merge, publish,
     10 * distribute, sub license, and/or sell copies of the Software, and to
     11 * permit persons to whom the Software is furnished to do so, subject to
     12 * the following conditions:
     13 *
     14 * The above copyright notice and this permission notice (including the
     15 * next paragraph) shall be included in all copies or substantial portions
     16 * of the Software.
     17 *
     18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
     21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
     22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
     23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
     24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
     25 *
     26 **************************************************************************/
     27
     28#ifndef _VMWGFX_FENCE_H_
     29
     30#include <linux/dma-fence.h>
     31#include <linux/dma-fence-array.h>
     32
     33#define VMW_FENCE_WAIT_TIMEOUT (5*HZ)
     34
     35struct drm_device;
     36struct drm_file;
     37struct drm_pending_event;
     38
     39struct vmw_private;
     40struct vmw_fence_manager;
     41
     42/**
     43 *
     44 *
     45 */
     46enum vmw_action_type {
     47	VMW_ACTION_EVENT = 0,
     48	VMW_ACTION_MAX
     49};
     50
     51struct vmw_fence_action {
     52	struct list_head head;
     53	enum vmw_action_type type;
     54	void (*seq_passed) (struct vmw_fence_action *action);
     55	void (*cleanup) (struct vmw_fence_action *action);
     56};
     57
     58struct vmw_fence_obj {
     59	struct dma_fence base;
     60
     61	struct list_head head;
     62	struct list_head seq_passed_actions;
     63	void (*destroy)(struct vmw_fence_obj *fence);
     64};
     65
     66extern struct vmw_fence_manager *
     67vmw_fence_manager_init(struct vmw_private *dev_priv);
     68
     69extern void vmw_fence_manager_takedown(struct vmw_fence_manager *fman);
     70
     71static inline void
     72vmw_fence_obj_unreference(struct vmw_fence_obj **fence_p)
     73{
     74	struct vmw_fence_obj *fence = *fence_p;
     75
     76	*fence_p = NULL;
     77	if (fence)
     78		dma_fence_put(&fence->base);
     79}
     80
     81static inline struct vmw_fence_obj *
     82vmw_fence_obj_reference(struct vmw_fence_obj *fence)
     83{
     84	if (fence)
     85		dma_fence_get(&fence->base);
     86	return fence;
     87}
     88
     89extern void vmw_fences_update(struct vmw_fence_manager *fman);
     90
     91extern bool vmw_fence_obj_signaled(struct vmw_fence_obj *fence);
     92
     93extern int vmw_fence_obj_wait(struct vmw_fence_obj *fence,
     94			      bool lazy,
     95			      bool interruptible, unsigned long timeout);
     96
     97extern int vmw_fence_create(struct vmw_fence_manager *fman,
     98			    uint32_t seqno,
     99			    struct vmw_fence_obj **p_fence);
    100
    101extern int vmw_user_fence_create(struct drm_file *file_priv,
    102				 struct vmw_fence_manager *fman,
    103				 uint32_t sequence,
    104				 struct vmw_fence_obj **p_fence,
    105				 uint32_t *p_handle);
    106
    107extern void vmw_fence_fifo_up(struct vmw_fence_manager *fman);
    108
    109extern void vmw_fence_fifo_down(struct vmw_fence_manager *fman);
    110
    111extern int vmw_fence_obj_wait_ioctl(struct drm_device *dev, void *data,
    112				    struct drm_file *file_priv);
    113
    114extern int vmw_fence_obj_signaled_ioctl(struct drm_device *dev, void *data,
    115					struct drm_file *file_priv);
    116
    117extern int vmw_fence_obj_unref_ioctl(struct drm_device *dev, void *data,
    118				     struct drm_file *file_priv);
    119extern int vmw_fence_event_ioctl(struct drm_device *dev, void *data,
    120				 struct drm_file *file_priv);
    121extern int vmw_event_fence_action_queue(struct drm_file *filee_priv,
    122					struct vmw_fence_obj *fence,
    123					struct drm_pending_event *event,
    124					uint32_t *tv_sec,
    125					uint32_t *tv_usec,
    126					bool interruptible);
    127#endif /* _VMWGFX_FENCE_H_ */