1 /* $NetBSD: nouveau_nv50_fence.c,v 1.3 2021/12/18 23:45:32 riastradh Exp $ */
2
3 /*
4 * Copyright 2012 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs <bskeggs@redhat.com>
25 */
26
27 #include <sys/cdefs.h>
28 __KERNEL_RCSID(0, "$NetBSD: nouveau_nv50_fence.c,v 1.3 2021/12/18 23:45:32 riastradh Exp $");
29
30 #include <nvif/os.h>
31 #include <nvif/class.h>
32 #include <nvif/cl0002.h>
33
34 #include "nouveau_drv.h"
35 #include "nouveau_dma.h"
36 #include "nv10_fence.h"
37
38 #include "nv50_display.h"
39
40 static int
nv50_fence_context_new(struct nouveau_channel * chan)41 nv50_fence_context_new(struct nouveau_channel *chan)
42 {
43 struct nv10_fence_priv *priv = chan->drm->fence;
44 struct nv10_fence_chan *fctx;
45 struct ttm_mem_reg *reg = &priv->bo->bo.mem;
46 u32 start = reg->start * PAGE_SIZE;
47 u32 limit = start + reg->size - 1;
48 int ret;
49
50 fctx = chan->fence = kzalloc(sizeof(*fctx), GFP_KERNEL);
51 if (!fctx)
52 return -ENOMEM;
53
54 nouveau_fence_context_new(chan, &fctx->base);
55 fctx->base.emit = nv10_fence_emit;
56 fctx->base.read = nv10_fence_read;
57 fctx->base.sync = nv17_fence_sync;
58
59 ret = nvif_object_init(&chan->user, NvSema, NV_DMA_IN_MEMORY,
60 &(struct nv_dma_v0) {
61 .target = NV_DMA_V0_TARGET_VRAM,
62 .access = NV_DMA_V0_ACCESS_RDWR,
63 .start = start,
64 .limit = limit,
65 }, sizeof(struct nv_dma_v0),
66 &fctx->sema);
67 if (ret)
68 nv10_fence_context_del(chan);
69 return ret;
70 }
71
72 int
nv50_fence_create(struct nouveau_drm * drm)73 nv50_fence_create(struct nouveau_drm *drm)
74 {
75 struct nv10_fence_priv *priv;
76 int ret = 0;
77
78 priv = drm->fence = kzalloc(sizeof(*priv), GFP_KERNEL);
79 if (!priv)
80 return -ENOMEM;
81
82 priv->base.dtor = nv10_fence_destroy;
83 priv->base.resume = nv17_fence_resume;
84 priv->base.context_new = nv50_fence_context_new;
85 priv->base.context_del = nv10_fence_context_del;
86 spin_lock_init(&priv->lock);
87
88 ret = nouveau_bo_new(&drm->client, 4096, 0x1000, TTM_PL_FLAG_VRAM,
89 0, 0x0000, NULL, NULL, &priv->bo);
90 if (!ret) {
91 ret = nouveau_bo_pin(priv->bo, TTM_PL_FLAG_VRAM, false);
92 if (!ret) {
93 ret = nouveau_bo_map(priv->bo);
94 if (ret)
95 nouveau_bo_unpin(priv->bo);
96 }
97 if (ret)
98 nouveau_bo_ref(NULL, &priv->bo);
99 }
100
101 if (ret) {
102 nv10_fence_destroy(drm);
103 return ret;
104 }
105
106 nouveau_bo_wr32(priv->bo, 0x000, 0x00000000);
107 return ret;
108 }
109