2 * Copyright 2012 Red Hat Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
25 #include <subdev/ltcg.h>
26 #include <subdev/fb.h>
27 #include <subdev/timer.h>
29 struct nvc0_ltcg_priv {
30 struct nouveau_ltcg base;
35 struct nouveau_mm tags;
36 struct nouveau_mm_node *tag_ram;
40 nvc0_ltcg_subp_isr(struct nvc0_ltcg_priv *priv, int unit, int subp)
42 u32 subp_base = 0x141000 + (unit * 0x2000) + (subp * 0x400);
43 u32 stat = nv_rd32(priv, subp_base + 0x020);
46 nv_info(priv, "LTC%d_LTS%d: 0x%08x\n", unit, subp, stat);
47 nv_wr32(priv, subp_base + 0x020, stat);
52 nvc0_ltcg_intr(struct nouveau_subdev *subdev)
54 struct nvc0_ltcg_priv *priv = (void *)subdev;
57 units = nv_rd32(priv, 0x00017c);
59 u32 subp, unit = ffs(units) - 1;
60 for (subp = 0; subp < priv->subp_nr; subp++)
61 nvc0_ltcg_subp_isr(priv, unit, subp);
62 units &= ~(1 << unit);
65 /* we do something horribly wrong and upset PMFB a lot, so mask off
66 * interrupts from it after the first one until it's fixed
68 nv_mask(priv, 0x000640, 0x02000000, 0x00000000);
72 nvc0_ltcg_tags_alloc(struct nouveau_ltcg *ltcg, u32 n,
73 struct nouveau_mm_node **pnode)
75 struct nvc0_ltcg_priv *priv = (struct nvc0_ltcg_priv *)ltcg;
78 ret = nouveau_mm_head(&priv->tags, 1, n, n, 1, pnode);
86 nvc0_ltcg_tags_free(struct nouveau_ltcg *ltcg, struct nouveau_mm_node **pnode)
88 struct nvc0_ltcg_priv *priv = (struct nvc0_ltcg_priv *)ltcg;
90 nouveau_mm_free(&priv->tags, pnode);
94 nvc0_ltcg_tags_clear(struct nouveau_ltcg *ltcg, u32 first, u32 count)
96 struct nvc0_ltcg_priv *priv = (struct nvc0_ltcg_priv *)ltcg;
97 u32 last = first + count - 1;
100 BUG_ON((first > last) || (last >= priv->num_tags));
102 nv_wr32(priv, 0x17e8cc, first);
103 nv_wr32(priv, 0x17e8d0, last);
104 nv_wr32(priv, 0x17e8c8, 0x4); /* trigger clear */
106 /* wait until it's finished with clearing */
107 for (p = 0; p < priv->part_nr; ++p) {
108 for (i = 0; i < priv->subp_nr; ++i)
109 nv_wait(priv, 0x1410c8 + p * 0x2000 + i * 0x400, ~0, 0);
113 /* TODO: Figure out tag memory details and drop the over-cautious allocation.
116 nvc0_ltcg_init_tag_ram(struct nouveau_fb *pfb, struct nvc0_ltcg_priv *priv)
118 u32 tag_size, tag_margin, tag_align;
121 /* tags for 1/4 of VRAM should be enough (8192/4 per GiB of VRAM) */
122 priv->num_tags = (pfb->ram->size >> 17) / 4;
123 if (priv->num_tags > (1 << 17))
124 priv->num_tags = 1 << 17; /* we have 17 bits in PTE */
125 priv->num_tags = (priv->num_tags + 63) & ~63; /* round up to 64 */
127 tag_align = priv->part_nr * 0x800;
128 tag_margin = (tag_align < 0x6000) ? 0x6000 : tag_align;
130 /* 4 part 4 sub: 0x2000 bytes for 56 tags */
131 /* 3 part 4 sub: 0x6000 bytes for 168 tags */
133 * About 147 bytes per tag. Let's be safe and allocate x2, which makes
134 * 0x4980 bytes for 64 tags, and round up to 0x6000 bytes for 64 tags.
136 * For 4 GiB of memory we'll have 8192 tags which makes 3 MiB, < 0.1 %.
138 tag_size = (priv->num_tags / 64) * 0x6000 + tag_margin;
139 tag_size += tag_align;
140 tag_size = (tag_size + 0xfff) >> 12; /* round up */
142 ret = nouveau_mm_tail(&pfb->vram, 1, tag_size, tag_size, 1,
147 u64 tag_base = (priv->tag_ram->offset << 12) + tag_margin;
149 tag_base += tag_align - 1;
150 ret = do_div(tag_base, tag_align);
152 priv->tag_base = tag_base;
154 ret = nouveau_mm_init(&priv->tags, 0, priv->num_tags, 1);
160 nvc0_ltcg_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
161 struct nouveau_oclass *oclass, void *data, u32 size,
162 struct nouveau_object **pobject)
164 struct nvc0_ltcg_priv *priv;
165 struct nouveau_fb *pfb = nouveau_fb(parent);
169 ret = nouveau_ltcg_create(parent, engine, oclass, &priv);
170 *pobject = nv_object(priv);
174 parts = nv_rd32(priv, 0x022438);
175 mask = nv_rd32(priv, 0x022554);
176 for (i = 0; i < parts; i++) {
177 if (!(mask & (1 << i)))
180 priv->subp_nr = nv_rd32(priv, 0x17e8dc) >> 28;
182 ret = nvc0_ltcg_init_tag_ram(pfb, priv);
186 priv->base.tags_alloc = nvc0_ltcg_tags_alloc;
187 priv->base.tags_free = nvc0_ltcg_tags_free;
188 priv->base.tags_clear = nvc0_ltcg_tags_clear;
190 nv_subdev(priv)->intr = nvc0_ltcg_intr;
195 nvc0_ltcg_dtor(struct nouveau_object *object)
197 struct nouveau_ltcg *ltcg = (struct nouveau_ltcg *)object;
198 struct nvc0_ltcg_priv *priv = (struct nvc0_ltcg_priv *)ltcg;
199 struct nouveau_fb *pfb = nouveau_fb(ltcg->base.base.parent);
201 nouveau_mm_fini(&priv->tags);
202 nouveau_mm_free(&pfb->vram, &priv->tag_ram);
204 nouveau_ltcg_destroy(ltcg);
208 nvc0_ltcg_init(struct nouveau_object *object)
210 struct nouveau_ltcg *ltcg = (struct nouveau_ltcg *)object;
211 struct nvc0_ltcg_priv *priv = (struct nvc0_ltcg_priv *)ltcg;
214 ret = nouveau_ltcg_init(ltcg);
218 nv_mask(priv, 0x17e820, 0x00100000, 0x00000000); /* INTR_EN &= ~0x10 */
219 nv_wr32(priv, 0x17e8d8, priv->part_nr);
220 if (nv_device(ltcg)->card_type >= NV_E0)
221 nv_wr32(priv, 0x17e000, priv->part_nr);
222 nv_wr32(priv, 0x17e8d4, priv->tag_base);
226 struct nouveau_oclass
228 .handle = NV_SUBDEV(LTCG, 0xc0),
229 .ofuncs = &(struct nouveau_ofuncs) {
230 .ctor = nvc0_ltcg_ctor,
231 .dtor = nvc0_ltcg_dtor,
232 .init = nvc0_ltcg_init,
233 .fini = _nouveau_ltcg_fini,