2 * Copyright (C) 2007 Ben Skeggs.
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 #include "nouveau_drv.h"
31 #include "nouveau_dma.h"
33 #define USE_REFCNT (dev_priv->card_type >= NV_10)
35 struct nouveau_fence
{
36 struct nouveau_channel
*channel
;
38 struct list_head entry
;
44 static inline struct nouveau_fence
*
45 nouveau_fence(void *sync_obj
)
47 return (struct nouveau_fence
*)sync_obj
;
51 nouveau_fence_del(struct kref
*ref
)
53 struct nouveau_fence
*fence
=
54 container_of(ref
, struct nouveau_fence
, refcount
);
60 nouveau_fence_update(struct nouveau_channel
*chan
)
62 struct drm_nouveau_private
*dev_priv
= chan
->dev
->dev_private
;
63 struct list_head
*entry
, *tmp
;
64 struct nouveau_fence
*fence
;
68 sequence
= nvchan_rd32(chan
, 0x48);
70 sequence
= atomic_read(&chan
->fence
.last_sequence_irq
);
72 if (chan
->fence
.sequence_ack
== sequence
)
74 chan
->fence
.sequence_ack
= sequence
;
76 spin_lock(&chan
->fence
.lock
);
77 list_for_each_safe(entry
, tmp
, &chan
->fence
.pending
) {
78 fence
= list_entry(entry
, struct nouveau_fence
, entry
);
80 sequence
= fence
->sequence
;
81 fence
->signalled
= true;
82 list_del(&fence
->entry
);
83 kref_put(&fence
->refcount
, nouveau_fence_del
);
85 if (sequence
== chan
->fence
.sequence_ack
)
88 spin_unlock(&chan
->fence
.lock
);
92 nouveau_fence_new(struct nouveau_channel
*chan
, struct nouveau_fence
**pfence
,
95 struct nouveau_fence
*fence
;
98 fence
= kzalloc(sizeof(*fence
), GFP_KERNEL
);
101 kref_init(&fence
->refcount
);
102 fence
->channel
= chan
;
105 ret
= nouveau_fence_emit(fence
);
108 nouveau_fence_unref((void *)&fence
);
113 struct nouveau_channel
*
114 nouveau_fence_channel(struct nouveau_fence
*fence
)
116 return fence
? fence
->channel
: NULL
;
120 nouveau_fence_emit(struct nouveau_fence
*fence
)
122 struct drm_nouveau_private
*dev_priv
= fence
->channel
->dev
->dev_private
;
123 struct nouveau_channel
*chan
= fence
->channel
;
126 ret
= RING_SPACE(chan
, 2);
130 if (unlikely(chan
->fence
.sequence
== chan
->fence
.sequence_ack
- 1)) {
131 nouveau_fence_update(chan
);
133 BUG_ON(chan
->fence
.sequence
==
134 chan
->fence
.sequence_ack
- 1);
137 fence
->sequence
= ++chan
->fence
.sequence
;
139 kref_get(&fence
->refcount
);
140 spin_lock(&chan
->fence
.lock
);
141 list_add_tail(&fence
->entry
, &chan
->fence
.pending
);
142 spin_unlock(&chan
->fence
.lock
);
144 BEGIN_RING(chan
, NvSubSw
, USE_REFCNT
? 0x0050 : 0x0150, 1);
145 OUT_RING(chan
, fence
->sequence
);
152 nouveau_fence_unref(void **sync_obj
)
154 struct nouveau_fence
*fence
= nouveau_fence(*sync_obj
);
157 kref_put(&fence
->refcount
, nouveau_fence_del
);
162 nouveau_fence_ref(void *sync_obj
)
164 struct nouveau_fence
*fence
= nouveau_fence(sync_obj
);
166 kref_get(&fence
->refcount
);
171 nouveau_fence_signalled(void *sync_obj
, void *sync_arg
)
173 struct nouveau_fence
*fence
= nouveau_fence(sync_obj
);
174 struct nouveau_channel
*chan
= fence
->channel
;
176 if (fence
->signalled
)
179 nouveau_fence_update(chan
);
180 return fence
->signalled
;
184 nouveau_fence_wait(void *sync_obj
, void *sync_arg
, bool lazy
, bool intr
)
186 unsigned long timeout
= jiffies
+ (3 * DRM_HZ
);
190 if (nouveau_fence_signalled(sync_obj
, sync_arg
))
193 if (time_after_eq(jiffies
, timeout
)) {
198 __set_current_state(intr
? TASK_INTERRUPTIBLE
199 : TASK_UNINTERRUPTIBLE
);
203 if (intr
&& signal_pending(current
)) {
209 __set_current_state(TASK_RUNNING
);
215 nouveau_fence_flush(void *sync_obj
, void *sync_arg
)
221 nouveau_fence_init(struct nouveau_channel
*chan
)
223 INIT_LIST_HEAD(&chan
->fence
.pending
);
224 spin_lock_init(&chan
->fence
.lock
);
225 atomic_set(&chan
->fence
.last_sequence_irq
, 0);
230 nouveau_fence_fini(struct nouveau_channel
*chan
)
232 struct list_head
*entry
, *tmp
;
233 struct nouveau_fence
*fence
;
235 list_for_each_safe(entry
, tmp
, &chan
->fence
.pending
) {
236 fence
= list_entry(entry
, struct nouveau_fence
, entry
);
238 fence
->signalled
= true;
239 list_del(&fence
->entry
);
240 kref_put(&fence
->refcount
, nouveau_fence_del
);
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