1 /*
2  * Copyright 2012 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors: Ben Skeggs <bskeggs@redhat.com>
23  */
24 
25 #include <core/object.h>
26 #include <core/class.h>
27 
28 #include "nouveau_drm.h"
29 #include "nouveau_dma.h"
30 #include "nv10_fence.h"
31 
32 int
33 nv17_fence_sync(struct nouveau_fence *fence,
34 		struct nouveau_channel *prev, struct nouveau_channel *chan)
35 {
36 	struct nv10_fence_priv *priv = chan->drm->fence;
37 	u32 value;
38 	int ret;
39 
40 	if (!mutex_trylock(&prev->cli->mutex))
41 		return -EBUSY;
42 
43 	spin_lock(&priv->lock);
44 	value = priv->sequence;
45 	priv->sequence += 2;
46 	spin_unlock(&priv->lock);
47 
48 	ret = RING_SPACE(prev, 5);
49 	if (!ret) {
50 		BEGIN_NV04(prev, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 4);
51 		OUT_RING  (prev, NvSema);
52 		OUT_RING  (prev, 0);
53 		OUT_RING  (prev, value + 0);
54 		OUT_RING  (prev, value + 1);
55 		FIRE_RING (prev);
56 	}
57 
58 	if (!ret && !(ret = RING_SPACE(chan, 5))) {
59 		BEGIN_NV04(chan, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 4);
60 		OUT_RING  (chan, NvSema);
61 		OUT_RING  (chan, 0);
62 		OUT_RING  (chan, value + 1);
63 		OUT_RING  (chan, value + 2);
64 		FIRE_RING (chan);
65 	}
66 
67 	mutex_unlock(&prev->cli->mutex);
68 	return 0;
69 }
70 
71 static int
72 nv17_fence_context_new(struct nouveau_channel *chan)
73 {
74 	struct nv10_fence_priv *priv = chan->drm->fence;
75 	struct nv10_fence_chan *fctx;
76 	struct ttm_mem_reg *mem = &priv->bo->bo.mem;
77 	struct nouveau_object *object;
78 	u32 start = mem->start * PAGE_SIZE;
79 	u32 limit = start + mem->size - 1;
80 	int ret = 0;
81 
82 	fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
83 	if (!fctx)
84 		return -ENOMEM;
85 
86 	nouveau_fence_context_new(&fctx->base);
87 	fctx->base.emit = nv10_fence_emit;
88 	fctx->base.read = nv10_fence_read;
89 	fctx->base.sync = nv17_fence_sync;
90 
91 	ret = nouveau_object_new(nv_object(chan->cli), chan->handle,
92 				 NvSema, 0x0002,
93 				 &(struct nv_dma_class) {
94 					.flags = NV_DMA_TARGET_VRAM |
95 						 NV_DMA_ACCESS_RDWR,
96 					.start = start,
97 					.limit = limit,
98 				 }, sizeof(struct nv_dma_class),
99 				 &object);
100 	if (ret)
101 		nv10_fence_context_del(chan);
102 	return ret;
103 }
104 
105 void
106 nv17_fence_resume(struct nouveau_drm *drm)
107 {
108 	struct nv10_fence_priv *priv = drm->fence;
109 
110 	nouveau_bo_wr32(priv->bo, 0, priv->sequence);
111 }
112 
113 int
114 nv17_fence_create(struct nouveau_drm *drm)
115 {
116 	struct nv10_fence_priv *priv;
117 	int ret = 0;
118 
119 	priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
120 	if (!priv)
121 		return -ENOMEM;
122 
123 	priv->base.dtor = nv10_fence_destroy;
124 	priv->base.resume = nv17_fence_resume;
125 	priv->base.context_new = nv17_fence_context_new;
126 	priv->base.context_del = nv10_fence_context_del;
127 	spin_lock_init(&priv->lock);
128 
129 	ret = nouveau_bo_new(drm->dev, 4096, 0x1000, TTM_PL_FLAG_VRAM,
130 			     0, 0x0000, NULL, &priv->bo);
131 	if (!ret) {
132 		ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM);
133 		if (!ret) {
134 			ret = nouveau_bo_map(priv->bo);
135 			if (ret)
136 				nouveau_bo_unpin(priv->bo);
137 		}
138 		if (ret)
139 			nouveau_bo_ref(NULL, &priv->bo);
140 	}
141 
142 	if (ret) {
143 		nv10_fence_destroy(drm);
144 		return ret;
145 	}
146 
147 	nouveau_bo_wr32(priv->bo, 0x000, 0x00000000);
148 	return ret;
149 }
150