1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Tegra host1x Syncpoints
5 * Copyright (c) 2010-2013, NVIDIA Corporation.
8 #ifndef __HOST1X_SYNCPT_H
9 #define __HOST1X_SYNCPT_H
11 #include <linux/atomic.h>
12 #include <linux/host1x.h>
13 #include <linux/kernel.h>
14 #include <linux/kref.h>
15 #include <linux/sched.h>
22 /* Reserved for replacing an expired wait with a NOP */
23 #define HOST1X_SYNCPT_RESERVED 0
25 struct host1x_syncpt_base {
30 struct host1x_syncpt {
40 struct host1x_syncpt_base *base;
43 struct host1x_fence_list fences;
46 * If a submission incrementing this syncpoint fails, lock it so that
47 * further submission cannot be made until application has handled the
53 /* Initialize sync point array */
54 int host1x_syncpt_init(struct host1x *host);
56 /* Free sync point array */
57 void host1x_syncpt_deinit(struct host1x *host);
59 /* Return number of sync point supported. */
60 unsigned int host1x_syncpt_nb_pts(struct host1x *host);
62 /* Return number of wait bases supported. */
63 unsigned int host1x_syncpt_nb_bases(struct host1x *host);
65 /* Return number of mlocks supported. */
66 unsigned int host1x_syncpt_nb_mlocks(struct host1x *host);
69 * Check sync point sanity. If max is larger than min, there have too many
70 * sync point increments.
72 * Client managed sync point are not tracked.
74 static inline bool host1x_syncpt_check_max(struct host1x_syncpt *sp, u32 real)
77 if (sp->client_managed)
79 max = host1x_syncpt_read_max(sp);
80 return (s32)(max - real) >= 0;
83 /* Return true if sync point is client managed. */
84 static inline bool host1x_syncpt_client_managed(struct host1x_syncpt *sp)
86 return sp->client_managed;
90 * Returns true if syncpoint min == max, which means that there are no
91 * outstanding operations.
93 static inline bool host1x_syncpt_idle(struct host1x_syncpt *sp)
97 min = atomic_read(&sp->min_val);
98 max = atomic_read(&sp->max_val);
102 /* Load current value from hardware to the shadow register. */
103 u32 host1x_syncpt_load(struct host1x_syncpt *sp);
105 /* Check if the given syncpoint value has already passed */
106 bool host1x_syncpt_is_expired(struct host1x_syncpt *sp, u32 thresh);
108 /* Save host1x sync point state into shadow registers. */
109 void host1x_syncpt_save(struct host1x *host);
111 /* Reset host1x sync point state from shadow registers. */
112 void host1x_syncpt_restore(struct host1x *host);
114 /* Read current wait base value into shadow register and return it. */
115 u32 host1x_syncpt_load_wait_base(struct host1x_syncpt *sp);
117 /* Indicate future operations by incrementing the sync point max. */
118 u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs);
120 /* Check if sync point id is valid. */
121 static inline int host1x_syncpt_is_valid(struct host1x_syncpt *sp)
123 return sp->id < host1x_syncpt_nb_pts(sp->host);
126 static inline void host1x_syncpt_set_locked(struct host1x_syncpt *sp)