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1925d456 TH |
1 | /************************************************************************** |
2 | * | |
3 | * Copyright (C) 2010 VMware, Inc., Palo Alto, CA., USA | |
4 | * All Rights Reserved. | |
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 | ||
29 | #include "vmwgfx_drv.h" | |
30 | ||
6bcd8d3c | 31 | struct vmw_marker { |
1925d456 | 32 | struct list_head head; |
6bcd8d3c | 33 | uint32_t seqno; |
1925d456 TH |
34 | struct timespec submitted; |
35 | }; | |
36 | ||
6bcd8d3c | 37 | void vmw_marker_queue_init(struct vmw_marker_queue *queue) |
1925d456 TH |
38 | { |
39 | INIT_LIST_HEAD(&queue->head); | |
40 | queue->lag = ns_to_timespec(0); | |
41 | getrawmonotonic(&queue->lag_time); | |
42 | spin_lock_init(&queue->lock); | |
43 | } | |
44 | ||
6bcd8d3c | 45 | void vmw_marker_queue_takedown(struct vmw_marker_queue *queue) |
1925d456 | 46 | { |
6bcd8d3c | 47 | struct vmw_marker *marker, *next; |
1925d456 TH |
48 | |
49 | spin_lock(&queue->lock); | |
6bcd8d3c TH |
50 | list_for_each_entry_safe(marker, next, &queue->head, head) { |
51 | kfree(marker); | |
1925d456 TH |
52 | } |
53 | spin_unlock(&queue->lock); | |
54 | } | |
55 | ||
6bcd8d3c TH |
56 | int vmw_marker_push(struct vmw_marker_queue *queue, |
57 | uint32_t seqno) | |
1925d456 | 58 | { |
6bcd8d3c | 59 | struct vmw_marker *marker = kmalloc(sizeof(*marker), GFP_KERNEL); |
1925d456 | 60 | |
6bcd8d3c | 61 | if (unlikely(!marker)) |
1925d456 TH |
62 | return -ENOMEM; |
63 | ||
6bcd8d3c TH |
64 | marker->seqno = seqno; |
65 | getrawmonotonic(&marker->submitted); | |
1925d456 | 66 | spin_lock(&queue->lock); |
6bcd8d3c | 67 | list_add_tail(&marker->head, &queue->head); |
1925d456 TH |
68 | spin_unlock(&queue->lock); |
69 | ||
70 | return 0; | |
71 | } | |
72 | ||
6bcd8d3c TH |
73 | int vmw_marker_pull(struct vmw_marker_queue *queue, |
74 | uint32_t signaled_seqno) | |
1925d456 | 75 | { |
6bcd8d3c | 76 | struct vmw_marker *marker, *next; |
1925d456 TH |
77 | struct timespec now; |
78 | bool updated = false; | |
79 | ||
80 | spin_lock(&queue->lock); | |
81 | getrawmonotonic(&now); | |
82 | ||
83 | if (list_empty(&queue->head)) { | |
84 | queue->lag = ns_to_timespec(0); | |
85 | queue->lag_time = now; | |
86 | updated = true; | |
87 | goto out_unlock; | |
88 | } | |
89 | ||
6bcd8d3c TH |
90 | list_for_each_entry_safe(marker, next, &queue->head, head) { |
91 | if (signaled_seqno - marker->seqno > (1 << 30)) | |
1925d456 TH |
92 | continue; |
93 | ||
6bcd8d3c | 94 | queue->lag = timespec_sub(now, marker->submitted); |
1925d456 TH |
95 | queue->lag_time = now; |
96 | updated = true; | |
6bcd8d3c TH |
97 | list_del(&marker->head); |
98 | kfree(marker); | |
1925d456 TH |
99 | } |
100 | ||
101 | out_unlock: | |
102 | spin_unlock(&queue->lock); | |
103 | ||
104 | return (updated) ? 0 : -EBUSY; | |
105 | } | |
106 | ||
107 | static struct timespec vmw_timespec_add(struct timespec t1, | |
108 | struct timespec t2) | |
109 | { | |
110 | t1.tv_sec += t2.tv_sec; | |
111 | t1.tv_nsec += t2.tv_nsec; | |
112 | if (t1.tv_nsec >= 1000000000L) { | |
113 | t1.tv_sec += 1; | |
114 | t1.tv_nsec -= 1000000000L; | |
115 | } | |
116 | ||
117 | return t1; | |
118 | } | |
119 | ||
6bcd8d3c | 120 | static struct timespec vmw_fifo_lag(struct vmw_marker_queue *queue) |
1925d456 TH |
121 | { |
122 | struct timespec now; | |
123 | ||
124 | spin_lock(&queue->lock); | |
125 | getrawmonotonic(&now); | |
126 | queue->lag = vmw_timespec_add(queue->lag, | |
127 | timespec_sub(now, queue->lag_time)); | |
128 | queue->lag_time = now; | |
129 | spin_unlock(&queue->lock); | |
130 | return queue->lag; | |
131 | } | |
132 | ||
133 | ||
6bcd8d3c | 134 | static bool vmw_lag_lt(struct vmw_marker_queue *queue, |
1925d456 TH |
135 | uint32_t us) |
136 | { | |
137 | struct timespec lag, cond; | |
138 | ||
139 | cond = ns_to_timespec((s64) us * 1000); | |
140 | lag = vmw_fifo_lag(queue); | |
141 | return (timespec_compare(&lag, &cond) < 1); | |
142 | } | |
143 | ||
144 | int vmw_wait_lag(struct vmw_private *dev_priv, | |
6bcd8d3c | 145 | struct vmw_marker_queue *queue, uint32_t us) |
1925d456 | 146 | { |
6bcd8d3c TH |
147 | struct vmw_marker *marker; |
148 | uint32_t seqno; | |
1925d456 TH |
149 | int ret; |
150 | ||
151 | while (!vmw_lag_lt(queue, us)) { | |
152 | spin_lock(&queue->lock); | |
153 | if (list_empty(&queue->head)) | |
6bcd8d3c | 154 | seqno = atomic_read(&dev_priv->marker_seq); |
1925d456 | 155 | else { |
6bcd8d3c TH |
156 | marker = list_first_entry(&queue->head, |
157 | struct vmw_marker, head); | |
158 | seqno = marker->seqno; | |
1925d456 TH |
159 | } |
160 | spin_unlock(&queue->lock); | |
161 | ||
6bcd8d3c TH |
162 | ret = vmw_wait_seqno(dev_priv, false, seqno, true, |
163 | 3*HZ); | |
1925d456 TH |
164 | |
165 | if (unlikely(ret != 0)) | |
166 | return ret; | |
167 | ||
6bcd8d3c | 168 | (void) vmw_marker_pull(queue, seqno); |
1925d456 TH |
169 | } |
170 | return 0; | |
171 | } |