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
;
67 spin_lock(&chan
->fence
.lock
);
70 sequence
= nvchan_rd32(chan
, 0x48);
72 sequence
= atomic_read(&chan
->fence
.last_sequence_irq
);
74 if (chan
->fence
.sequence_ack
== sequence
)
76 chan
->fence
.sequence_ack
= sequence
;
78 list_for_each_safe(entry
, tmp
, &chan
->fence
.pending
) {
79 fence
= list_entry(entry
, struct nouveau_fence
, entry
);
81 sequence
= fence
->sequence
;
82 fence
->signalled
= true;
83 list_del(&fence
->entry
);
84 kref_put(&fence
->refcount
, nouveau_fence_del
);
86 if (sequence
== chan
->fence
.sequence_ack
)
90 spin_unlock(&chan
->fence
.lock
);
94 nouveau_fence_new(struct nouveau_channel
*chan
, struct nouveau_fence
**pfence
,
97 struct nouveau_fence
*fence
;
100 fence
= kzalloc(sizeof(*fence
), GFP_KERNEL
);
103 kref_init(&fence
->refcount
);
104 fence
->channel
= chan
;
107 ret
= nouveau_fence_emit(fence
);
110 nouveau_fence_unref((void *)&fence
);
115 struct nouveau_channel
*
116 nouveau_fence_channel(struct nouveau_fence
*fence
)
118 return fence
? fence
->channel
: NULL
;
122 nouveau_fence_emit(struct nouveau_fence
*fence
)
124 struct drm_nouveau_private
*dev_priv
= fence
->channel
->dev
->dev_private
;
125 struct nouveau_channel
*chan
= fence
->channel
;
128 ret
= RING_SPACE(chan
, 2);
132 if (unlikely(chan
->fence
.sequence
== chan
->fence
.sequence_ack
- 1)) {
133 nouveau_fence_update(chan
);
135 BUG_ON(chan
->fence
.sequence
==
136 chan
->fence
.sequence_ack
- 1);
139 fence
->sequence
= ++chan
->fence
.sequence
;
141 kref_get(&fence
->refcount
);
142 spin_lock(&chan
->fence
.lock
);
143 list_add_tail(&fence
->entry
, &chan
->fence
.pending
);
144 spin_unlock(&chan
->fence
.lock
);
146 BEGIN_RING(chan
, NvSubSw
, USE_REFCNT
? 0x0050 : 0x0150, 1);
147 OUT_RING(chan
, fence
->sequence
);
154 nouveau_fence_unref(void **sync_obj
)
156 struct nouveau_fence
*fence
= nouveau_fence(*sync_obj
);
159 kref_put(&fence
->refcount
, nouveau_fence_del
);
164 nouveau_fence_ref(void *sync_obj
)
166 struct nouveau_fence
*fence
= nouveau_fence(sync_obj
);
168 kref_get(&fence
->refcount
);
173 nouveau_fence_signalled(void *sync_obj
, void *sync_arg
)
175 struct nouveau_fence
*fence
= nouveau_fence(sync_obj
);
176 struct nouveau_channel
*chan
= fence
->channel
;
178 if (fence
->signalled
)
181 nouveau_fence_update(chan
);
182 return fence
->signalled
;
186 nouveau_fence_wait(void *sync_obj
, void *sync_arg
, bool lazy
, bool intr
)
188 unsigned long timeout
= jiffies
+ (3 * DRM_HZ
);
192 if (nouveau_fence_signalled(sync_obj
, sync_arg
))
195 if (time_after_eq(jiffies
, timeout
)) {
200 __set_current_state(intr
? TASK_INTERRUPTIBLE
201 : TASK_UNINTERRUPTIBLE
);
205 if (intr
&& signal_pending(current
)) {
211 __set_current_state(TASK_RUNNING
);
217 nouveau_fence_flush(void *sync_obj
, void *sync_arg
)
223 nouveau_fence_init(struct nouveau_channel
*chan
)
225 INIT_LIST_HEAD(&chan
->fence
.pending
);
226 spin_lock_init(&chan
->fence
.lock
);
227 atomic_set(&chan
->fence
.last_sequence_irq
, 0);
232 nouveau_fence_fini(struct nouveau_channel
*chan
)
234 struct list_head
*entry
, *tmp
;
235 struct nouveau_fence
*fence
;
237 list_for_each_safe(entry
, tmp
, &chan
->fence
.pending
) {
238 fence
= list_entry(entry
, struct nouveau_fence
, entry
);
240 fence
->signalled
= true;
241 list_del(&fence
->entry
);
242 kref_put(&fence
->refcount
, nouveau_fence_del
);