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861d2107 BS |
1 | /* |
2 | * Copyright 2012 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 | ||
25 | #include <subdev/ltcg.h> | |
e30441ad CB |
26 | #include <subdev/fb.h> |
27 | #include <subdev/timer.h> | |
861d2107 BS |
28 | |
29 | struct nvc0_ltcg_priv { | |
30 | struct nouveau_ltcg base; | |
e30441ad | 31 | u32 part_nr; |
cd8c14b4 | 32 | u32 subp_nr; |
e30441ad CB |
33 | struct nouveau_mm tags; |
34 | u32 num_tags; | |
35 | struct nouveau_mm_node *tag_ram; | |
861d2107 BS |
36 | }; |
37 | ||
38 | static void | |
39 | nvc0_ltcg_subp_isr(struct nvc0_ltcg_priv *priv, int unit, int subp) | |
40 | { | |
41 | u32 subp_base = 0x141000 + (unit * 0x2000) + (subp * 0x400); | |
42 | u32 stat = nv_rd32(priv, subp_base + 0x020); | |
43 | ||
44 | if (stat) { | |
45 | nv_info(priv, "LTC%d_LTS%d: 0x%08x\n", unit, subp, stat); | |
46 | nv_wr32(priv, subp_base + 0x020, stat); | |
47 | } | |
48 | } | |
49 | ||
50 | static void | |
51 | nvc0_ltcg_intr(struct nouveau_subdev *subdev) | |
52 | { | |
53 | struct nvc0_ltcg_priv *priv = (void *)subdev; | |
54 | u32 units; | |
55 | ||
56 | units = nv_rd32(priv, 0x00017c); | |
57 | while (units) { | |
58 | u32 subp, unit = ffs(units) - 1; | |
cd8c14b4 | 59 | for (subp = 0; subp < priv->subp_nr; subp++) |
861d2107 BS |
60 | nvc0_ltcg_subp_isr(priv, unit, subp); |
61 | units &= ~(1 << unit); | |
62 | } | |
63 | ||
64 | /* we do something horribly wrong and upset PMFB a lot, so mask off | |
65 | * interrupts from it after the first one until it's fixed | |
66 | */ | |
67 | nv_mask(priv, 0x000640, 0x02000000, 0x00000000); | |
68 | } | |
69 | ||
e30441ad CB |
70 | static int |
71 | nvc0_ltcg_tags_alloc(struct nouveau_ltcg *ltcg, u32 n, | |
72 | struct nouveau_mm_node **pnode) | |
73 | { | |
74 | struct nvc0_ltcg_priv *priv = (struct nvc0_ltcg_priv *)ltcg; | |
75 | int ret; | |
76 | ||
77 | ret = nouveau_mm_head(&priv->tags, 1, n, n, 1, pnode); | |
78 | if (ret) | |
79 | *pnode = NULL; | |
80 | ||
81 | return ret; | |
82 | } | |
83 | ||
84 | static void | |
85 | nvc0_ltcg_tags_free(struct nouveau_ltcg *ltcg, struct nouveau_mm_node **pnode) | |
86 | { | |
87 | struct nvc0_ltcg_priv *priv = (struct nvc0_ltcg_priv *)ltcg; | |
88 | ||
89 | nouveau_mm_free(&priv->tags, pnode); | |
90 | } | |
91 | ||
92 | static void | |
93 | nvc0_ltcg_tags_clear(struct nouveau_ltcg *ltcg, u32 first, u32 count) | |
94 | { | |
95 | struct nvc0_ltcg_priv *priv = (struct nvc0_ltcg_priv *)ltcg; | |
96 | u32 last = first + count - 1; | |
97 | int p, i; | |
98 | ||
99 | BUG_ON((first > last) || (last >= priv->num_tags)); | |
100 | ||
101 | nv_wr32(priv, 0x17e8cc, first); | |
102 | nv_wr32(priv, 0x17e8d0, last); | |
103 | nv_wr32(priv, 0x17e8c8, 0x4); /* trigger clear */ | |
104 | ||
105 | /* wait until it's finished with clearing */ | |
106 | for (p = 0; p < priv->part_nr; ++p) { | |
e30441ad CB |
107 | for (i = 0; i < priv->subp_nr; ++i) |
108 | nv_wait(priv, 0x1410c8 + p * 0x2000 + i * 0x400, ~0, 0); | |
109 | } | |
110 | } | |
111 | ||
112 | /* TODO: Figure out tag memory details and drop the over-cautious allocation. | |
113 | */ | |
114 | static int | |
115 | nvc0_ltcg_init_tag_ram(struct nouveau_fb *pfb, struct nvc0_ltcg_priv *priv) | |
116 | { | |
117 | u32 tag_size, tag_margin, tag_align; | |
118 | int ret; | |
119 | ||
120 | nv_wr32(priv, 0x17e8d8, priv->part_nr); | |
fe6fc096 BS |
121 | if (nv_device(pfb)->card_type >= NV_E0) |
122 | nv_wr32(priv, 0x17e000, priv->part_nr); | |
e30441ad CB |
123 | |
124 | /* tags for 1/4 of VRAM should be enough (8192/4 per GiB of VRAM) */ | |
dceef5d8 | 125 | priv->num_tags = (pfb->ram->size >> 17) / 4; |
e30441ad CB |
126 | if (priv->num_tags > (1 << 17)) |
127 | priv->num_tags = 1 << 17; /* we have 17 bits in PTE */ | |
128 | priv->num_tags = (priv->num_tags + 63) & ~63; /* round up to 64 */ | |
129 | ||
130 | tag_align = priv->part_nr * 0x800; | |
131 | tag_margin = (tag_align < 0x6000) ? 0x6000 : tag_align; | |
132 | ||
133 | /* 4 part 4 sub: 0x2000 bytes for 56 tags */ | |
134 | /* 3 part 4 sub: 0x6000 bytes for 168 tags */ | |
135 | /* | |
136 | * About 147 bytes per tag. Let's be safe and allocate x2, which makes | |
137 | * 0x4980 bytes for 64 tags, and round up to 0x6000 bytes for 64 tags. | |
138 | * | |
139 | * For 4 GiB of memory we'll have 8192 tags which makes 3 MiB, < 0.1 %. | |
140 | */ | |
141 | tag_size = (priv->num_tags / 64) * 0x6000 + tag_margin; | |
142 | tag_size += tag_align; | |
143 | tag_size = (tag_size + 0xfff) >> 12; /* round up */ | |
144 | ||
145 | ret = nouveau_mm_tail(&pfb->vram, 0, tag_size, tag_size, 1, | |
146 | &priv->tag_ram); | |
147 | if (ret) { | |
148 | priv->num_tags = 0; | |
149 | } else { | |
150 | u64 tag_base = (priv->tag_ram->offset << 12) + tag_margin; | |
151 | ||
152 | tag_base += tag_align - 1; | |
8cb303a8 | 153 | ret = do_div(tag_base, tag_align); |
e30441ad CB |
154 | |
155 | nv_wr32(priv, 0x17e8d4, tag_base); | |
156 | } | |
157 | ret = nouveau_mm_init(&priv->tags, 0, priv->num_tags, 1); | |
158 | ||
159 | return ret; | |
160 | } | |
161 | ||
861d2107 BS |
162 | static int |
163 | nvc0_ltcg_ctor(struct nouveau_object *parent, struct nouveau_object *engine, | |
164 | struct nouveau_oclass *oclass, void *data, u32 size, | |
165 | struct nouveau_object **pobject) | |
166 | { | |
167 | struct nvc0_ltcg_priv *priv; | |
e30441ad | 168 | struct nouveau_fb *pfb = nouveau_fb(parent); |
49debbe4 BS |
169 | u32 parts, mask; |
170 | int ret, i; | |
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171 | |
172 | ret = nouveau_ltcg_create(parent, engine, oclass, &priv); | |
173 | *pobject = nv_object(priv); | |
174 | if (ret) | |
175 | return ret; | |
176 | ||
49debbe4 BS |
177 | parts = nv_rd32(priv, 0x022438); |
178 | mask = nv_rd32(priv, 0x022554); | |
179 | for (i = 0; i < parts; i++) { | |
180 | if (!(mask & (1 << i))) | |
181 | priv->part_nr++; | |
182 | } | |
e30441ad CB |
183 | priv->subp_nr = nv_rd32(priv, 0x17e8dc) >> 28; |
184 | ||
861d2107 BS |
185 | nv_mask(priv, 0x17e820, 0x00100000, 0x00000000); /* INTR_EN &= ~0x10 */ |
186 | ||
e30441ad CB |
187 | ret = nvc0_ltcg_init_tag_ram(pfb, priv); |
188 | if (ret) | |
189 | return ret; | |
190 | ||
191 | priv->base.tags_alloc = nvc0_ltcg_tags_alloc; | |
192 | priv->base.tags_free = nvc0_ltcg_tags_free; | |
193 | priv->base.tags_clear = nvc0_ltcg_tags_clear; | |
194 | ||
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195 | nv_subdev(priv)->intr = nvc0_ltcg_intr; |
196 | return 0; | |
197 | } | |
198 | ||
e30441ad CB |
199 | static void |
200 | nvc0_ltcg_dtor(struct nouveau_object *object) | |
201 | { | |
202 | struct nouveau_ltcg *ltcg = (struct nouveau_ltcg *)object; | |
203 | struct nvc0_ltcg_priv *priv = (struct nvc0_ltcg_priv *)ltcg; | |
204 | struct nouveau_fb *pfb = nouveau_fb(ltcg->base.base.parent); | |
205 | ||
206 | nouveau_mm_fini(&priv->tags); | |
207 | nouveau_mm_free(&pfb->vram, &priv->tag_ram); | |
208 | ||
209 | nouveau_ltcg_destroy(ltcg); | |
210 | } | |
211 | ||
861d2107 BS |
212 | struct nouveau_oclass |
213 | nvc0_ltcg_oclass = { | |
214 | .handle = NV_SUBDEV(LTCG, 0xc0), | |
215 | .ofuncs = &(struct nouveau_ofuncs) { | |
216 | .ctor = nvc0_ltcg_ctor, | |
e30441ad | 217 | .dtor = nvc0_ltcg_dtor, |
861d2107 BS |
218 | .init = _nouveau_ltcg_init, |
219 | .fini = _nouveau_ltcg_fini, | |
220 | }, | |
221 | }; |