1 /* $NetBSD: nouveau_nvkm_subdev_fb_nv30.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $ */
2
3 /*
4 * Copyright (C) 2010 Francisco Jerez.
5 * All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining
8 * a copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sublicense, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial
17 * portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
22 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
23 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
24 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
25 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
27 */
28 #include <sys/cdefs.h>
29 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_fb_nv30.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $");
30
31 #include "priv.h"
32 #include "ram.h"
33
34 void
nv30_fb_tile_init(struct nvkm_fb * fb,int i,u32 addr,u32 size,u32 pitch,u32 flags,struct nvkm_fb_tile * tile)35 nv30_fb_tile_init(struct nvkm_fb *fb, int i, u32 addr, u32 size, u32 pitch,
36 u32 flags, struct nvkm_fb_tile *tile)
37 {
38 /* for performance, select alternate bank offset for zeta */
39 if (!(flags & 4)) {
40 tile->addr = (0 << 4);
41 } else {
42 if (fb->func->tile.comp) /* z compression */
43 fb->func->tile.comp(fb, i, size, flags, tile);
44 tile->addr = (1 << 4);
45 }
46
47 tile->addr |= 0x00000001; /* enable */
48 tile->addr |= addr;
49 tile->limit = max(1u, addr + size) - 1;
50 tile->pitch = pitch;
51 }
52
53 static void
nv30_fb_tile_comp(struct nvkm_fb * fb,int i,u32 size,u32 flags,struct nvkm_fb_tile * tile)54 nv30_fb_tile_comp(struct nvkm_fb *fb, int i, u32 size, u32 flags,
55 struct nvkm_fb_tile *tile)
56 {
57 u32 tiles = DIV_ROUND_UP(size, 0x40);
58 u32 tags = round_up(tiles / fb->ram->parts, 0x40);
59 if (!nvkm_mm_head(&fb->tags, 0, 1, tags, tags, 1, &tile->tag)) {
60 if (flags & 2) tile->zcomp |= 0x01000000; /* Z16 */
61 else tile->zcomp |= 0x02000000; /* Z24S8 */
62 tile->zcomp |= ((tile->tag->offset ) >> 6);
63 tile->zcomp |= ((tile->tag->offset + tags - 1) >> 6) << 12;
64 #ifdef __BIG_ENDIAN
65 tile->zcomp |= 0x10000000;
66 #endif
67 }
68 }
69
70 static int
calc_bias(struct nvkm_fb * fb,int k,int i,int j)71 calc_bias(struct nvkm_fb *fb, int k, int i, int j)
72 {
73 struct nvkm_device *device = fb->subdev.device;
74 int b = (device->chipset > 0x30 ?
75 nvkm_rd32(device, 0x122c + 0x10 * k + 0x4 * j) >>
76 (4 * (i ^ 1)) :
77 0) & 0xf;
78
79 return 2 * (b & 0x8 ? b - 0x10 : b);
80 }
81
82 static int
calc_ref(struct nvkm_fb * fb,int l,int k,int i)83 calc_ref(struct nvkm_fb *fb, int l, int k, int i)
84 {
85 int j, x = 0;
86
87 for (j = 0; j < 4; j++) {
88 int m = (l >> (8 * i) & 0xff) + calc_bias(fb, k, i, j);
89
90 x |= (0x80 | clamp(m, 0, 0x1f)) << (8 * j);
91 }
92
93 return x;
94 }
95
96 void
nv30_fb_init(struct nvkm_fb * fb)97 nv30_fb_init(struct nvkm_fb *fb)
98 {
99 struct nvkm_device *device = fb->subdev.device;
100 int i, j;
101
102 /* Init the memory timing regs at 0x10037c/0x1003ac */
103 if (device->chipset == 0x30 ||
104 device->chipset == 0x31 ||
105 device->chipset == 0x35) {
106 /* Related to ROP count */
107 int n = (device->chipset == 0x31 ? 2 : 4);
108 int l = nvkm_rd32(device, 0x1003d0);
109
110 for (i = 0; i < n; i++) {
111 for (j = 0; j < 3; j++)
112 nvkm_wr32(device, 0x10037c + 0xc * i + 0x4 * j,
113 calc_ref(fb, l, 0, j));
114
115 for (j = 0; j < 2; j++)
116 nvkm_wr32(device, 0x1003ac + 0x8 * i + 0x4 * j,
117 calc_ref(fb, l, 1, j));
118 }
119 }
120 }
121
122 static const struct nvkm_fb_func
123 nv30_fb = {
124 .tags = nv20_fb_tags,
125 .init = nv30_fb_init,
126 .tile.regions = 8,
127 .tile.init = nv30_fb_tile_init,
128 .tile.comp = nv30_fb_tile_comp,
129 .tile.fini = nv20_fb_tile_fini,
130 .tile.prog = nv20_fb_tile_prog,
131 .ram_new = nv20_ram_new,
132 };
133
134 int
nv30_fb_new(struct nvkm_device * device,int index,struct nvkm_fb ** pfb)135 nv30_fb_new(struct nvkm_device *device, int index, struct nvkm_fb **pfb)
136 {
137 return nvkm_fb_new_(&nv30_fb, device, index, pfb);
138 }
139