1 /*
2 * Copyright 2014 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 #include "priv.h"
25
26 static int
nvkm_ltc_tags_alloc(struct nvkm_ltc * ltc,u32 n,struct nvkm_mm_node ** pnode)27 nvkm_ltc_tags_alloc(struct nvkm_ltc *ltc, u32 n, struct nvkm_mm_node **pnode)
28 {
29 struct nvkm_ltc_priv *priv = (void *)ltc;
30 int ret;
31
32 ret = nvkm_mm_head(&priv->tags, 0, 1, n, n, 1, pnode);
33 if (ret)
34 *pnode = NULL;
35
36 return ret;
37 }
38
39 static void
nvkm_ltc_tags_free(struct nvkm_ltc * ltc,struct nvkm_mm_node ** pnode)40 nvkm_ltc_tags_free(struct nvkm_ltc *ltc, struct nvkm_mm_node **pnode)
41 {
42 struct nvkm_ltc_priv *priv = (void *)ltc;
43 nvkm_mm_free(&priv->tags, pnode);
44 }
45
46 static void
nvkm_ltc_tags_clear(struct nvkm_ltc * ltc,u32 first,u32 count)47 nvkm_ltc_tags_clear(struct nvkm_ltc *ltc, u32 first, u32 count)
48 {
49 const struct nvkm_ltc_impl *impl = (void *)nv_oclass(ltc);
50 struct nvkm_ltc_priv *priv = (void *)ltc;
51 const u32 limit = first + count - 1;
52
53 BUG_ON((first > limit) || (limit >= priv->num_tags));
54
55 impl->cbc_clear(priv, first, limit);
56 impl->cbc_wait(priv);
57 }
58
59 static int
nvkm_ltc_zbc_color_get(struct nvkm_ltc * ltc,int index,const u32 color[4])60 nvkm_ltc_zbc_color_get(struct nvkm_ltc *ltc, int index, const u32 color[4])
61 {
62 const struct nvkm_ltc_impl *impl = (void *)nv_oclass(ltc);
63 struct nvkm_ltc_priv *priv = (void *)ltc;
64 memcpy(priv->zbc_color[index], color, sizeof(priv->zbc_color[index]));
65 impl->zbc_clear_color(priv, index, color);
66 return index;
67 }
68
69 static int
nvkm_ltc_zbc_depth_get(struct nvkm_ltc * ltc,int index,const u32 depth)70 nvkm_ltc_zbc_depth_get(struct nvkm_ltc *ltc, int index, const u32 depth)
71 {
72 const struct nvkm_ltc_impl *impl = (void *)nv_oclass(ltc);
73 struct nvkm_ltc_priv *priv = (void *)ltc;
74 priv->zbc_depth[index] = depth;
75 impl->zbc_clear_depth(priv, index, depth);
76 return index;
77 }
78
79 int
_nvkm_ltc_init(struct nvkm_object * object)80 _nvkm_ltc_init(struct nvkm_object *object)
81 {
82 const struct nvkm_ltc_impl *impl = (void *)nv_oclass(object);
83 struct nvkm_ltc_priv *priv = (void *)object;
84 int ret, i;
85
86 ret = nvkm_subdev_init(&priv->base.base);
87 if (ret)
88 return ret;
89
90 for (i = priv->base.zbc_min; i <= priv->base.zbc_max; i++) {
91 impl->zbc_clear_color(priv, i, priv->zbc_color[i]);
92 impl->zbc_clear_depth(priv, i, priv->zbc_depth[i]);
93 }
94
95 return 0;
96 }
97
98 int
nvkm_ltc_create_(struct nvkm_object * parent,struct nvkm_object * engine,struct nvkm_oclass * oclass,int length,void ** pobject)99 nvkm_ltc_create_(struct nvkm_object *parent, struct nvkm_object *engine,
100 struct nvkm_oclass *oclass, int length, void **pobject)
101 {
102 const struct nvkm_ltc_impl *impl = (void *)oclass;
103 struct nvkm_ltc_priv *priv;
104 int ret;
105
106 ret = nvkm_subdev_create_(parent, engine, oclass, 0, "PLTCG",
107 "l2c", length, pobject);
108 priv = *pobject;
109 if (ret)
110 return ret;
111
112 memset(priv->zbc_color, 0x00, sizeof(priv->zbc_color));
113 memset(priv->zbc_depth, 0x00, sizeof(priv->zbc_depth));
114
115 priv->base.base.intr = impl->intr;
116 priv->base.tags_alloc = nvkm_ltc_tags_alloc;
117 priv->base.tags_free = nvkm_ltc_tags_free;
118 priv->base.tags_clear = nvkm_ltc_tags_clear;
119 priv->base.zbc_min = 1; /* reserve 0 for disabled */
120 priv->base.zbc_max = min(impl->zbc, NVKM_LTC_MAX_ZBC_CNT) - 1;
121 priv->base.zbc_color_get = nvkm_ltc_zbc_color_get;
122 priv->base.zbc_depth_get = nvkm_ltc_zbc_depth_get;
123 return 0;
124 }
125