linux/drivers/dma-buf/sync_debug.h
Rob Clark 70e67aaec2 dma-buf/sw_sync: Add fence deadline support
This consists of simply storing the most recent deadline, and adding an
ioctl to retrieve the deadline.  This can be used in conjunction with
the SET_DEADLINE ioctl on a fence fd for testing.  Ie. create various
sw_sync fences, merge them into a fence-array, set deadline on the
fence-array and confirm that it is propagated properly to each fence.

v2: Switch UABI to express deadline as u64
v3: More verbose UAPI docs, show how to convert from timespec
v4: Better comments, track the soonest deadline, as a normal fence
    implementation would, return an error if no deadline set.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230823215458.203366-4-robdclark@gmail.com
2023-12-02 01:18:46 +02:00

75 lines
1.9 KiB
C

/*
* Sync File validation framework and debug infomation
*
* Copyright (C) 2012 Google, Inc.
*
* This program is distributed in the hope that 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.
*
*/
#ifndef _LINUX_SYNC_H
#define _LINUX_SYNC_H
#include <linux/list.h>
#include <linux/rbtree.h>
#include <linux/spinlock.h>
#include <linux/dma-fence.h>
#include <linux/sync_file.h>
#include <uapi/linux/sync_file.h>
/**
* struct sync_timeline - sync object
* @kref: reference count on fence.
* @name: name of the sync_timeline. Useful for debugging
* @lock: lock protecting @pt_list and @value
* @pt_tree: rbtree of active (unsignaled/errored) sync_pts
* @pt_list: list of active (unsignaled/errored) sync_pts
* @sync_timeline_list: membership in global sync_timeline_list
*/
struct sync_timeline {
struct kref kref;
char name[32];
/* protected by lock */
u64 context;
int value;
struct rb_root pt_tree;
struct list_head pt_list;
spinlock_t lock;
struct list_head sync_timeline_list;
};
static inline struct sync_timeline *dma_fence_parent(struct dma_fence *fence)
{
return container_of(fence->lock, struct sync_timeline, lock);
}
/**
* struct sync_pt - sync_pt object
* @base: base fence object
* @link: link on the sync timeline's list
* @node: node in the sync timeline's tree
* @deadline: the earliest fence deadline hint
*/
struct sync_pt {
struct dma_fence base;
struct list_head link;
struct rb_node node;
ktime_t deadline;
};
extern const struct file_operations sw_sync_debugfs_fops;
void sync_timeline_debug_add(struct sync_timeline *obj);
void sync_timeline_debug_remove(struct sync_timeline *obj);
void sync_file_debug_add(struct sync_file *fence);
void sync_file_debug_remove(struct sync_file *fence);
#endif /* _LINUX_SYNC_H */