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
23  */
24 #include "priv.h"
25 
26 #include <subdev/fb.h>
27 #include <subdev/timer.h>
28 
29 static void
30 gm107_ltc_cbc_clear(struct nvkm_ltc_priv *ltc, u32 start, u32 limit)
31 {
32 	nv_wr32(ltc, 0x17e270, start);
33 	nv_wr32(ltc, 0x17e274, limit);
34 	nv_wr32(ltc, 0x17e26c, 0x00000004);
35 }
36 
37 static void
38 gm107_ltc_cbc_wait(struct nvkm_ltc_priv *ltc)
39 {
40 	int c, s;
41 	for (c = 0; c < ltc->ltc_nr; c++) {
42 		for (s = 0; s < ltc->lts_nr; s++)
43 			nv_wait(ltc, 0x14046c + c * 0x2000 + s * 0x200, ~0, 0);
44 	}
45 }
46 
47 static void
48 gm107_ltc_zbc_clear_color(struct nvkm_ltc_priv *ltc, int i, const u32 color[4])
49 {
50 	nv_mask(ltc, 0x17e338, 0x0000000f, i);
51 	nv_wr32(ltc, 0x17e33c, color[0]);
52 	nv_wr32(ltc, 0x17e340, color[1]);
53 	nv_wr32(ltc, 0x17e344, color[2]);
54 	nv_wr32(ltc, 0x17e348, color[3]);
55 }
56 
57 static void
58 gm107_ltc_zbc_clear_depth(struct nvkm_ltc_priv *ltc, int i, const u32 depth)
59 {
60 	nv_mask(ltc, 0x17e338, 0x0000000f, i);
61 	nv_wr32(ltc, 0x17e34c, depth);
62 }
63 
64 static void
65 gm107_ltc_lts_isr(struct nvkm_ltc_priv *ltc, int c, int s)
66 {
67 	u32 base = 0x140000 + (c * 0x2000) + (s * 0x400);
68 	u32 stat = nv_rd32(ltc, base + 0x00c);
69 
70 	if (stat) {
71 		nv_info(ltc, "LTC%d_LTS%d: 0x%08x\n", c, s, stat);
72 		nv_wr32(ltc, base + 0x00c, stat);
73 	}
74 }
75 
76 static void
77 gm107_ltc_intr(struct nvkm_subdev *subdev)
78 {
79 	struct nvkm_ltc_priv *ltc = (void *)subdev;
80 	u32 mask;
81 
82 	mask = nv_rd32(ltc, 0x00017c);
83 	while (mask) {
84 		u32 s, c = __ffs(mask);
85 		for (s = 0; s < ltc->lts_nr; s++)
86 			gm107_ltc_lts_isr(ltc, c, s);
87 		mask &= ~(1 << c);
88 	}
89 }
90 
91 static int
92 gm107_ltc_init(struct nvkm_object *object)
93 {
94 	struct nvkm_ltc_priv *ltc = (void *)object;
95 	u32 lpg128 = !(nv_rd32(ltc, 0x100c80) & 0x00000001);
96 	int ret;
97 
98 	ret = nvkm_ltc_init(ltc);
99 	if (ret)
100 		return ret;
101 
102 	nv_wr32(ltc, 0x17e27c, ltc->ltc_nr);
103 	nv_wr32(ltc, 0x17e278, ltc->tag_base);
104 	nv_mask(ltc, 0x17e264, 0x00000002, lpg128 ? 0x00000002 : 0x00000000);
105 	return 0;
106 }
107 
108 static int
109 gm107_ltc_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
110 	       struct nvkm_oclass *oclass, void *data, u32 size,
111 	       struct nvkm_object **pobject)
112 {
113 	struct nvkm_fb *fb = nvkm_fb(parent);
114 	struct nvkm_ltc_priv *ltc;
115 	u32 parts, mask;
116 	int ret, i;
117 
118 	ret = nvkm_ltc_create(parent, engine, oclass, &ltc);
119 	*pobject = nv_object(ltc);
120 	if (ret)
121 		return ret;
122 
123 	parts = nv_rd32(ltc, 0x022438);
124 	mask = nv_rd32(ltc, 0x021c14);
125 	for (i = 0; i < parts; i++) {
126 		if (!(mask & (1 << i)))
127 			ltc->ltc_nr++;
128 	}
129 	ltc->lts_nr = nv_rd32(ltc, 0x17e280) >> 28;
130 
131 	ret = gf100_ltc_init_tag_ram(fb, ltc);
132 	if (ret)
133 		return ret;
134 
135 	return 0;
136 }
137 
138 struct nvkm_oclass *
139 gm107_ltc_oclass = &(struct nvkm_ltc_impl) {
140 	.base.handle = NV_SUBDEV(LTC, 0xff),
141 	.base.ofuncs = &(struct nvkm_ofuncs) {
142 		.ctor = gm107_ltc_ctor,
143 		.dtor = gf100_ltc_dtor,
144 		.init = gm107_ltc_init,
145 		.fini = _nvkm_ltc_fini,
146 	},
147 	.intr = gm107_ltc_intr,
148 	.cbc_clear = gm107_ltc_cbc_clear,
149 	.cbc_wait = gm107_ltc_cbc_wait,
150 	.zbc = 16,
151 	.zbc_clear_color = gm107_ltc_zbc_clear_color,
152 	.zbc_clear_depth = gm107_ltc_zbc_clear_depth,
153 }.base;
154