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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Tegra host1x Syncpoints
4 *
5 * Copyright (c) 2010-2013, NVIDIA Corporation.
6 */
7
8#ifndef __HOST1X_SYNCPT_H
9#define __HOST1X_SYNCPT_H
10
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>
16
17#include "fence.h"
18#include "intr.h"
19
20struct host1x;
21
22/* Reserved for replacing an expired wait with a NOP */
23#define HOST1X_SYNCPT_RESERVED 0
24
25struct host1x_syncpt_base {
26 unsigned int id;
27 bool requested;
28};
29
30struct host1x_syncpt {
31 struct kref ref;
32
33 unsigned int id;
34 atomic_t min_val;
35 atomic_t max_val;
36 u32 base_val;
37 const char *name;
38 bool client_managed;
39 struct host1x *host;
40 struct host1x_syncpt_base *base;
41
42 /* interrupt data */
43 struct host1x_fence_list fences;
44
45 /*
46 * If a submission incrementing this syncpoint fails, lock it so that
47 * further submission cannot be made until application has handled the
48 * failure.
49 */
50 bool locked;
51};
52
53/* Initialize sync point array */
54int host1x_syncpt_init(struct host1x *host);
55
56/* Free sync point array */
57void host1x_syncpt_deinit(struct host1x *host);
58
59/* Return number of sync point supported. */
60unsigned int host1x_syncpt_nb_pts(struct host1x *host);
61
62/* Return number of wait bases supported. */
63unsigned int host1x_syncpt_nb_bases(struct host1x *host);
64
65/* Return number of mlocks supported. */
66unsigned int host1x_syncpt_nb_mlocks(struct host1x *host);
67
68/*
69 * Check sync point sanity. If max is larger than min, there have too many
70 * sync point increments.
71 *
72 * Client managed sync point are not tracked.
73 * */
74static inline bool host1x_syncpt_check_max(struct host1x_syncpt *sp, u32 real)
75{
76 u32 max;
77 if (sp->client_managed)
78 return true;
79 max = host1x_syncpt_read_max(sp);
80 return (s32)(max - real) >= 0;
81}
82
83/* Return true if sync point is client managed. */
84static inline bool host1x_syncpt_client_managed(struct host1x_syncpt *sp)
85{
86 return sp->client_managed;
87}
88
89/*
90 * Returns true if syncpoint min == max, which means that there are no
91 * outstanding operations.
92 */
93static inline bool host1x_syncpt_idle(struct host1x_syncpt *sp)
94{
95 int min, max;
96 smp_rmb();
97 min = atomic_read(&sp->min_val);
98 max = atomic_read(&sp->max_val);
99 return (min == max);
100}
101
102/* Load current value from hardware to the shadow register. */
103u32 host1x_syncpt_load(struct host1x_syncpt *sp);
104
105/* Check if the given syncpoint value has already passed */
106bool host1x_syncpt_is_expired(struct host1x_syncpt *sp, u32 thresh);
107
108/* Save host1x sync point state into shadow registers. */
109void host1x_syncpt_save(struct host1x *host);
110
111/* Reset host1x sync point state from shadow registers. */
112void host1x_syncpt_restore(struct host1x *host);
113
114/* Read current wait base value into shadow register and return it. */
115u32 host1x_syncpt_load_wait_base(struct host1x_syncpt *sp);
116
117/* Indicate future operations by incrementing the sync point max. */
118u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs);
119
120/* Check if sync point id is valid. */
121static inline int host1x_syncpt_is_valid(struct host1x_syncpt *sp)
122{
123 return sp->id < host1x_syncpt_nb_pts(sp->host);
124}
125
126static inline void host1x_syncpt_set_locked(struct host1x_syncpt *sp)
127{
128 sp->locked = true;
129}
130
131#endif
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Tegra host1x Syncpoints
4 *
5 * Copyright (c) 2010-2013, NVIDIA Corporation.
6 */
7
8#ifndef __HOST1X_SYNCPT_H
9#define __HOST1X_SYNCPT_H
10
11#include <linux/atomic.h>
12#include <linux/host1x.h>
13#include <linux/kernel.h>
14#include <linux/sched.h>
15
16#include "intr.h"
17
18struct host1x;
19
20/* Reserved for replacing an expired wait with a NOP */
21#define HOST1X_SYNCPT_RESERVED 0
22
23struct host1x_syncpt_base {
24 unsigned int id;
25 bool requested;
26};
27
28struct host1x_syncpt {
29 unsigned int id;
30 atomic_t min_val;
31 atomic_t max_val;
32 u32 base_val;
33 const char *name;
34 bool client_managed;
35 struct host1x *host;
36 struct host1x_client *client;
37 struct host1x_syncpt_base *base;
38
39 /* interrupt data */
40 struct host1x_syncpt_intr intr;
41};
42
43/* Initialize sync point array */
44int host1x_syncpt_init(struct host1x *host);
45
46/* Free sync point array */
47void host1x_syncpt_deinit(struct host1x *host);
48
49/* Return number of sync point supported. */
50unsigned int host1x_syncpt_nb_pts(struct host1x *host);
51
52/* Return number of wait bases supported. */
53unsigned int host1x_syncpt_nb_bases(struct host1x *host);
54
55/* Return number of mlocks supported. */
56unsigned int host1x_syncpt_nb_mlocks(struct host1x *host);
57
58/*
59 * Check sync point sanity. If max is larger than min, there have too many
60 * sync point increments.
61 *
62 * Client managed sync point are not tracked.
63 * */
64static inline bool host1x_syncpt_check_max(struct host1x_syncpt *sp, u32 real)
65{
66 u32 max;
67 if (sp->client_managed)
68 return true;
69 max = host1x_syncpt_read_max(sp);
70 return (s32)(max - real) >= 0;
71}
72
73/* Return true if sync point is client managed. */
74static inline bool host1x_syncpt_client_managed(struct host1x_syncpt *sp)
75{
76 return sp->client_managed;
77}
78
79/*
80 * Returns true if syncpoint min == max, which means that there are no
81 * outstanding operations.
82 */
83static inline bool host1x_syncpt_idle(struct host1x_syncpt *sp)
84{
85 int min, max;
86 smp_rmb();
87 min = atomic_read(&sp->min_val);
88 max = atomic_read(&sp->max_val);
89 return (min == max);
90}
91
92/* Load current value from hardware to the shadow register. */
93u32 host1x_syncpt_load(struct host1x_syncpt *sp);
94
95/* Check if the given syncpoint value has already passed */
96bool host1x_syncpt_is_expired(struct host1x_syncpt *sp, u32 thresh);
97
98/* Save host1x sync point state into shadow registers. */
99void host1x_syncpt_save(struct host1x *host);
100
101/* Reset host1x sync point state from shadow registers. */
102void host1x_syncpt_restore(struct host1x *host);
103
104/* Read current wait base value into shadow register and return it. */
105u32 host1x_syncpt_load_wait_base(struct host1x_syncpt *sp);
106
107/* Indicate future operations by incrementing the sync point max. */
108u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs);
109
110/* Check if sync point id is valid. */
111static inline int host1x_syncpt_is_valid(struct host1x_syncpt *sp)
112{
113 return sp->id < host1x_syncpt_nb_pts(sp->host);
114}
115
116#endif