1/* $NetBSD: nouveau_subdev_ltcg_gm107.c,v 1.1.1.1 2014/08/06 12:36:31 riastradh Exp $ */
2
3/*
4 * Copyright 2014 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
25 */
26
27#include <sys/cdefs.h>
28__KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_ltcg_gm107.c,v 1.1.1.1 2014/08/06 12:36:31 riastradh Exp $");
29
30#include <subdev/fb.h>
31#include <subdev/timer.h>
32
33#include "gf100.h"
34
35static void
36gm107_ltcg_lts_isr(struct gf100_ltcg_priv *priv, int ltc, int lts)
37{
38 u32 base = 0x140000 + (ltc * 0x2000) + (lts * 0x400);
39 u32 stat = nv_rd32(priv, base + 0x00c);
40
41 if (stat) {
42 nv_info(priv, "LTC%d_LTS%d: 0x%08x\n", ltc, lts, stat);
43 nv_wr32(priv, base + 0x00c, stat);
44 }
45}
46
47static void
48gm107_ltcg_intr(struct nouveau_subdev *subdev)
49{
50 struct gf100_ltcg_priv *priv = (void *)subdev;
51 u32 mask;
52
53 mask = nv_rd32(priv, 0x00017c);
54 while (mask) {
55 u32 lts, ltc = __ffs(mask);
56 for (lts = 0; lts < priv->lts_nr; lts++)
57 gm107_ltcg_lts_isr(priv, ltc, lts);
58 mask &= ~(1 << ltc);
59 }
60
61 /* we do something horribly wrong and upset PMFB a lot, so mask off
62 * interrupts from it after the first one until it's fixed
63 */
64 nv_mask(priv, 0x000640, 0x02000000, 0x00000000);
65}
66
67static void
68gm107_ltcg_tags_clear(struct nouveau_ltcg *ltcg, u32 first, u32 count)
69{
70 struct gf100_ltcg_priv *priv = (struct gf100_ltcg_priv *)ltcg;
71 u32 last = first + count - 1;
72 int p, i;
73
74 BUG_ON((first > last) || (last >= priv->num_tags));
75
76 nv_wr32(priv, 0x17e270, first);
77 nv_wr32(priv, 0x17e274, last);
78 nv_wr32(priv, 0x17e26c, 0x4); /* trigger clear */
79
80 /* wait until it's finished with clearing */
81 for (p = 0; p < priv->ltc_nr; ++p) {
82 for (i = 0; i < priv->lts_nr; ++i)
83 nv_wait(priv, 0x14046c + p * 0x2000 + i * 0x200, ~0, 0);
84 }
85}
86
87static int
88gm107_ltcg_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
89 struct nouveau_oclass *oclass, void *data, u32 size,
90 struct nouveau_object **pobject)
91{
92 struct gf100_ltcg_priv *priv;
93 struct nouveau_fb *pfb = nouveau_fb(parent);
94 u32 parts, mask;
95 int ret, i;
96
97 ret = nouveau_ltcg_create(parent, engine, oclass, &priv);
98 *pobject = nv_object(priv);
99 if (ret)
100 return ret;
101
102 parts = nv_rd32(priv, 0x022438);
103 mask = nv_rd32(priv, 0x021c14);
104 for (i = 0; i < parts; i++) {
105 if (!(mask & (1 << i)))
106 priv->ltc_nr++;
107 }
108 priv->lts_nr = nv_rd32(priv, 0x17e280) >> 28;
109
110 ret = gf100_ltcg_init_tag_ram(pfb, priv);
111 if (ret)
112 return ret;
113
114 priv->base.tags_alloc = gf100_ltcg_tags_alloc;
115 priv->base.tags_free = gf100_ltcg_tags_free;
116 priv->base.tags_clear = gm107_ltcg_tags_clear;
117
118 nv_subdev(priv)->intr = gm107_ltcg_intr;
119 return 0;
120}
121
122static int
123gm107_ltcg_init(struct nouveau_object *object)
124{
125 struct nouveau_ltcg *ltcg = (struct nouveau_ltcg *)object;
126 struct gf100_ltcg_priv *priv = (struct gf100_ltcg_priv *)ltcg;
127 int ret;
128
129 ret = nouveau_ltcg_init(ltcg);
130 if (ret)
131 return ret;
132
133 nv_wr32(priv, 0x17e27c, priv->ltc_nr);
134 nv_wr32(priv, 0x17e278, priv->tag_base);
135 return 0;
136}
137
138struct nouveau_oclass *
139gm107_ltcg_oclass = &(struct nouveau_oclass) {
140 .handle = NV_SUBDEV(LTCG, 0xff),
141 .ofuncs = &(struct nouveau_ofuncs) {
142 .ctor = gm107_ltcg_ctor,
143 .dtor = gf100_ltcg_dtor,
144 .init = gm107_ltcg_init,
145 .fini = _nouveau_ltcg_fini,
146 },
147};
148