summaryrefslogtreecommitdiff
path: root/src/gallium/drivers/nvc0/nvc0_fence.c
blob: 3a3dd75c152a946f70acb813b16646681df67b4d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
/*
 * Copyright 2010 Christoph Bumiller
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include "nvc0_fence.h"
#include "nvc0_context.h"
#include "nvc0_screen.h"

#ifdef PIPE_OS_UNIX
#include <sched.h>
#endif

boolean
nvc0_screen_fence_new(struct nvc0_screen *screen, struct nvc0_fence **fence,
                      boolean emit)
{
   *fence = CALLOC_STRUCT(nvc0_fence);
   if (!*fence)
      return FALSE;

   (*fence)->screen = screen;
   (*fence)->ref = 1;

   if (emit)
      nvc0_fence_emit(*fence);

   return TRUE;
}

void
nvc0_fence_emit(struct nvc0_fence *fence)
{
   struct nvc0_screen *screen = fence->screen;
   struct nouveau_channel *chan = screen->base.channel;

   fence->sequence = ++screen->fence.sequence;

   assert(fence->state == NVC0_FENCE_STATE_AVAILABLE);

   MARK_RING (chan, 5, 2);
   BEGIN_RING(chan, RING_3D(QUERY_ADDRESS_HIGH), 4);
   OUT_RELOCh(chan, screen->fence.bo, 0, NOUVEAU_BO_WR);
   OUT_RELOCl(chan, screen->fence.bo, 0, NOUVEAU_BO_WR);
   OUT_RING  (chan, fence->sequence);
   OUT_RING  (chan, NVC0_3D_QUERY_GET_FENCE | NVC0_3D_QUERY_GET_SHORT |
              (0xf << NVC0_3D_QUERY_GET_UNIT__SHIFT));

   ++fence->ref;

   if (screen->fence.tail)
      screen->fence.tail->next = fence;
   else
      screen->fence.head = fence;

   screen->fence.tail = fence;

   fence->state = NVC0_FENCE_STATE_EMITTED;
}

static void
nvc0_fence_trigger_release_buffers(struct nvc0_fence *fence);

void
nvc0_fence_del(struct nvc0_fence *fence)
{
   struct nvc0_fence *it;
   struct nvc0_screen *screen = fence->screen;

   if (fence->state == NVC0_FENCE_STATE_EMITTED) {
      if (fence == screen->fence.head) {
         screen->fence.head = fence->next;
         if (!screen->fence.head)
            screen->fence.tail = NULL;
      } else {
         for (it = screen->fence.head; it && it->next != fence; it = it->next);
         it->next = fence->next;
         if (screen->fence.tail == fence)
            screen->fence.tail = it;
      }
   }

   if (fence->buffers) {
      debug_printf("WARNING: deleting fence with buffers "
                   "still hooked to it !\n");
      nvc0_fence_trigger_release_buffers(fence);
   }

   FREE(fence);
}

static void
nvc0_fence_trigger_release_buffers(struct nvc0_fence *fence)
{
   struct nvc0_mm_allocation *alloc = fence->buffers;

   while (alloc) {
      struct nvc0_mm_allocation *next = alloc->next;
      nvc0_mm_free(alloc);
      alloc = next;
   };
   fence->buffers = NULL;
}

static void
nvc0_screen_fence_update(struct nvc0_screen *screen)
{
   struct nvc0_fence *fence;
   struct nvc0_fence *next = NULL;
   uint32_t sequence = screen->fence.map[0];

   if (screen->fence.sequence_ack == sequence)
      return;
   screen->fence.sequence_ack = sequence;

   for (fence = screen->fence.head; fence; fence = next) {
      next = fence->next;
      sequence = fence->sequence;

      fence->state = NVC0_FENCE_STATE_SIGNALLED;

      if (fence->buffers)
         nvc0_fence_trigger_release_buffers(fence);

      nvc0_fence_reference(&fence, NULL);

      if (sequence == screen->fence.sequence_ack)
         break;
   }
   screen->fence.head = next;
   if (!next)
      screen->fence.tail = NULL;
}

#define NVC0_FENCE_MAX_SPINS (1 << 17)

boolean
nvc0_fence_signalled(struct nvc0_fence *fence)
{
   struct nvc0_screen *screen = fence->screen;

   if (fence->state == NVC0_FENCE_STATE_EMITTED)
      nvc0_screen_fence_update(screen);

   return fence->state == NVC0_FENCE_STATE_SIGNALLED;
}

boolean
nvc0_fence_wait(struct nvc0_fence *fence)
{
   struct nvc0_screen *screen = fence->screen;
   int spins = 0;

   if (fence->state == NVC0_FENCE_STATE_AVAILABLE) {
      nvc0_fence_emit(fence);

      FIRE_RING(screen->base.channel);

      if (fence == screen->fence.current)
         nvc0_screen_fence_new(screen, &screen->fence.current, FALSE);
   }

   do {
      nvc0_screen_fence_update(screen);

      if (fence->state == NVC0_FENCE_STATE_SIGNALLED)
         return TRUE;
      spins++;
#ifdef PIPE_OS_UNIX
      if (!(spins % 8)) /* donate a few cycles */
         sched_yield();
#endif
   } while (spins < NVC0_FENCE_MAX_SPINS);

   if (spins > 9000)
      NOUVEAU_ERR("fence %x: been spinning too long\n", fence->sequence);

   return FALSE;
}

void
nvc0_screen_fence_next(struct nvc0_screen *screen)
{
   nvc0_fence_emit(screen->fence.current);
   nvc0_screen_fence_new(screen, &screen->fence.current, FALSE);
   nvc0_screen_fence_update(screen);
}