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
26static int
27nvkm_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
39static void
40nvkm_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
46static void
47nvkm_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
59static int
60nvkm_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
69static int
70nvkm_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
79int
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
98int
99nvkm_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