LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/fb/nv30.c

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