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>
21 /* Reserved for replacing an expired wait with a NOP */
22 #define HOST1X_SYNCPT_RESERVED 0
24 struct host1x_syncpt_base {
29 struct host1x_syncpt {
39 struct host1x_syncpt_base *base;
42 struct host1x_syncpt_intr intr;
45 * If a submission incrementing this syncpoint fails, lock it so that
46 * further submission cannot be made until application has handled the
52 /* Initialize sync point array */
53 int host1x_syncpt_init(struct host1x *host);
55 /* Free sync point array */
56 void host1x_syncpt_deinit(struct host1x *host);
58 /* Return number of sync point supported. */
59 unsigned int host1x_syncpt_nb_pts(struct host1x *host);
61 /* Return number of wait bases supported. */
62 unsigned int host1x_syncpt_nb_bases(struct host1x *host);
64 /* Return number of mlocks supported. */
65 unsigned int host1x_syncpt_nb_mlocks(struct host1x *host);
68 * Check sync point sanity. If max is larger than min, there have too many
69 * sync point increments.
71 * Client managed sync point are not tracked.
73 static inline bool host1x_syncpt_check_max(struct host1x_syncpt *sp, u32 real)
76 if (sp->client_managed)
78 max = host1x_syncpt_read_max(sp);
79 return (s32)(max - real) >= 0;
82 /* Return true if sync point is client managed. */
83 static inline bool host1x_syncpt_client_managed(struct host1x_syncpt *sp)
85 return sp->client_managed;
89 * Returns true if syncpoint min == max, which means that there are no
90 * outstanding operations.
92 static inline bool host1x_syncpt_idle(struct host1x_syncpt *sp)
96 min = atomic_read(&sp->min_val);
97 max = atomic_read(&sp->max_val);
101 /* Load current value from hardware to the shadow register. */
102 u32 host1x_syncpt_load(struct host1x_syncpt *sp);
104 /* Check if the given syncpoint value has already passed */
105 bool host1x_syncpt_is_expired(struct host1x_syncpt *sp, u32 thresh);
107 /* Save host1x sync point state into shadow registers. */
108 void host1x_syncpt_save(struct host1x *host);
110 /* Reset host1x sync point state from shadow registers. */
111 void host1x_syncpt_restore(struct host1x *host);
113 /* Read current wait base value into shadow register and return it. */
114 u32 host1x_syncpt_load_wait_base(struct host1x_syncpt *sp);
116 /* Indicate future operations by incrementing the sync point max. */
117 u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs);
119 /* Check if sync point id is valid. */
120 static inline int host1x_syncpt_is_valid(struct host1x_syncpt *sp)
122 return sp->id < host1x_syncpt_nb_pts(sp->host);
125 static inline void host1x_syncpt_set_locked(struct host1x_syncpt *sp)