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 #include "nv50_display.h"
34 
35 static int
36 nv50_fence_context_new(struct nouveau_channel *chan)
37 {
38 	struct nv10_fence_priv *priv = chan->drm->fence;
39 	struct nv10_fence_chan *fctx;
40 	struct ttm_mem_reg *reg = &priv->bo->bo.mem;
41 	u32 start = reg->start * PAGE_SIZE;
42 	u32 limit = start + reg->size - 1;
43 	int ret;
44 
45 	fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
46 	if (!fctx)
47 		return -ENOMEM;
48 
49 	nouveau_fence_context_new(chan, &fctx->base);
50 	fctx->base.emit = nv10_fence_emit;
51 	fctx->base.read = nv10_fence_read;
52 	fctx->base.sync = nv17_fence_sync;
53 
54 	ret = nvif_object_init(&chan->user, NvSema, NV_DMA_IN_MEMORY,
55 			       &(struct nv_dma_v0) {
56 					.target = NV_DMA_V0_TARGET_VRAM,
57 					.access = NV_DMA_V0_ACCESS_RDWR,
58 					.start = start,
59 					.limit = limit,
60 			       }, sizeof(struct nv_dma_v0),
61 			       &fctx->sema);
62 	if (ret)
63 		nv10_fence_context_del(chan);
64 	return ret;
65 }
66 
67 int
68 nv50_fence_create(struct nouveau_drm *drm)
69 {
70 	struct nv10_fence_priv *priv;
71 	int ret = 0;
72 
73 	priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
74 	if (!priv)
75 		return -ENOMEM;
76 
77 	priv->base.dtor = nv10_fence_destroy;
78 	priv->base.resume = nv17_fence_resume;
79 	priv->base.context_new = nv50_fence_context_new;
80 	priv->base.context_del = nv10_fence_context_del;
81 	spin_lock_init(&priv->lock);
82 
83 	ret = nouveau_bo_new(&drm->client, 4096, 0x1000, TTM_PL_FLAG_VRAM,
84 			     0, 0x0000, NULL, NULL, &priv->bo);
85 	if (!ret) {
86 		ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM, false);
87 		if (!ret) {
88 			ret = nouveau_bo_map(priv->bo);
89 			if (ret)
90 				nouveau_bo_unpin(priv->bo);
91 		}
92 		if (ret)
93 			nouveau_bo_ref(NULL, &priv->bo);
94 	}
95 
96 	if (ret) {
97 		nv10_fence_destroy(drm);
98 		return ret;
99 	}
100 
101 	nouveau_bo_wr32(priv->bo, 0x000, 0x00000000);
102 	return ret;
103 }
104