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 <nvif/os.h>
26 #include <nvif/class.h>
27 #include <nvif/cl0002.h>
28 
29 #include "nouveau_drv.h"
30 #include "nouveau_dma.h"
31 #include "nv10_fence.h"
32 
33 int
34 nv17_fence_sync(struct nouveau_fence *fence,
35 		struct nouveau_channel *prev, struct nouveau_channel *chan)
36 {
37 	struct nouveau_cli *cli = (void *)prev->user.client;
38 	struct nv10_fence_priv *priv = chan->drm->fence;
39 	struct nv10_fence_chan *fctx = chan->fence;
40 	u32 value;
41 	int ret;
42 
43 	if (!mutex_trylock(&cli->mutex))
44 		return -EBUSY;
45 
46 	spin_lock(&priv->lock);
47 	value = priv->sequence;
48 	priv->sequence += 2;
49 	spin_unlock(&priv->lock);
50 
51 	ret = RING_SPACE(prev, 5);
52 	if (!ret) {
53 		BEGIN_NV04(prev, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 4);
54 		OUT_RING  (prev, fctx->sema.handle);
55 		OUT_RING  (prev, 0);
56 		OUT_RING  (prev, value + 0);
57 		OUT_RING  (prev, value + 1);
58 		FIRE_RING (prev);
59 	}
60 
61 	if (!ret && !(ret = RING_SPACE(chan, 5))) {
62 		BEGIN_NV04(chan, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 4);
63 		OUT_RING  (chan, fctx->sema.handle);
64 		OUT_RING  (chan, 0);
65 		OUT_RING  (chan, value + 1);
66 		OUT_RING  (chan, value + 2);
67 		FIRE_RING (chan);
68 	}
69 
70 	mutex_unlock(&cli->mutex);
71 	return 0;
72 }
73 
74 static int
75 nv17_fence_context_new(struct nouveau_channel *chan)
76 {
77 	struct nv10_fence_priv *priv = chan->drm->fence;
78 	struct nv10_fence_chan *fctx;
79 	struct ttm_mem_reg *reg = &priv->bo->bo.mem;
80 	u32 start = reg->start * PAGE_SIZE;
81 	u32 limit = start + reg->size - 1;
82 	int ret = 0;
83 
84 	fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
85 	if (!fctx)
86 		return -ENOMEM;
87 
88 	nouveau_fence_context_new(chan, &fctx->base);
89 	fctx->base.emit = nv10_fence_emit;
90 	fctx->base.read = nv10_fence_read;
91 	fctx->base.sync = nv17_fence_sync;
92 
93 	ret = nvif_object_init(&chan->user, NvSema, NV_DMA_FROM_MEMORY,
94 			       &(struct nv_dma_v0) {
95 					.target = NV_DMA_V0_TARGET_VRAM,
96 					.access = NV_DMA_V0_ACCESS_RDWR,
97 					.start = start,
98 					.limit = limit,
99 			       }, sizeof(struct nv_dma_v0),
100 			       &fctx->sema);
101 	if (ret)
102 		nv10_fence_context_del(chan);
103 	return ret;
104 }
105 
106 void
107 nv17_fence_resume(struct nouveau_drm *drm)
108 {
109 	struct nv10_fence_priv *priv = drm->fence;
110 
111 	nouveau_bo_wr32(priv->bo, 0, priv->sequence);
112 }
113 
114 int
115 nv17_fence_create(struct nouveau_drm *drm)
116 {
117 	struct nv10_fence_priv *priv;
118 	int ret = 0;
119 
120 	priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
121 	if (!priv)
122 		return -ENOMEM;
123 
124 	priv->base.dtor = nv10_fence_destroy;
125 	priv->base.resume = nv17_fence_resume;
126 	priv->base.context_new = nv17_fence_context_new;
127 	priv->base.context_del = nv10_fence_context_del;
128 	spin_lock_init(&priv->lock);
129 
130 	ret = nouveau_bo_new(&drm->client, 4096, 0x1000, TTM_PL_FLAG_VRAM,
131 			     0, 0x0000, NULL, NULL, &priv->bo);
132 	if (!ret) {
133 		ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM, false);
134 		if (!ret) {
135 			ret = nouveau_bo_map(priv->bo);
136 			if (ret)
137 				nouveau_bo_unpin(priv->bo);
138 		}
139 		if (ret)
140 			nouveau_bo_ref(NULL, &priv->bo);
141 	}
142 
143 	if (ret) {
144 		nv10_fence_destroy(drm);
145 		return ret;
146 	}
147 
148 	nouveau_bo_wr32(priv->bo, 0x000, 0x00000000);
149 	return ret;
150 }
151