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
  29 void
  30 nv30_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
  48 static void
  49 nv30_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, 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
  65 static int
  66 calc_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
  77 static int
  78 calc_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
  91 void
  92 nv30_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
 117 static const struct nvkm_fb_func
 118 nv30_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
 129 int
 130 nv30_fb_new(struct nvkm_device *device, int index, struct nvkm_fb **pfb)
 131 {
 132         return nvkm_fb_new_(&nv30_fb, device, index, pfb);
 133 }