drivers/gpu/drm/nouveau/nvkm/subdev/ltc/base.c

   1 /*
   2  * Copyright 2014 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 <bskeggs@redhat.com>
  23  */
  24
  25 #include "priv.h"
  26
  27 static int
  28 nvkm_ltc_tags_alloc(struct nouveau_ltc *ltc, u32 n,
  29                     struct nouveau_mm_node **pnode)
  30 {
  31         struct nvkm_ltc_priv *priv = (void *)ltc;
  32         int ret;
  33
  34         ret = nouveau_mm_head(&priv->tags, 0, 1, n, n, 1, pnode);
  35         if (ret)
  36                 *pnode = NULL;
  37
  38         return ret;
  39 }
  40
  41 static void
  42 nvkm_ltc_tags_free(struct nouveau_ltc *ltc, struct nouveau_mm_node **pnode)
  43 {
  44         struct nvkm_ltc_priv *priv = (void *)ltc;
  45         nouveau_mm_free(&priv->tags, pnode);
  46 }
  47
  48 static void
  49 nvkm_ltc_tags_clear(struct nouveau_ltc *ltc, u32 first, u32 count)
  50 {
  51         const struct nvkm_ltc_impl *impl = (void *)nv_oclass(ltc);
  52         struct nvkm_ltc_priv *priv = (void *)ltc;
  53         const u32 limit = first + count - 1;
  54
  55         BUG_ON((first > limit) || (limit >= priv->num_tags));
  56
  57         impl->cbc_clear(priv, first, limit);
  58         impl->cbc_wait(priv);
  59 }
  60
  61 static int
  62 nvkm_ltc_zbc_color_get(struct nouveau_ltc *ltc, int index, const u32 color[4])
  63 {
  64         const struct nvkm_ltc_impl *impl = (void *)nv_oclass(ltc);
  65         struct nvkm_ltc_priv *priv = (void *)ltc;
  66         memcpy(priv->zbc_color[index], color, sizeof(priv->zbc_color[index]));
  67         impl->zbc_clear_color(priv, index, color);
  68         return index;
  69 }
  70
  71 static int
  72 nvkm_ltc_zbc_depth_get(struct nouveau_ltc *ltc, int index, const u32 depth)
  73 {
  74         const struct nvkm_ltc_impl *impl = (void *)nv_oclass(ltc);
  75         struct nvkm_ltc_priv *priv = (void *)ltc;
  76         priv->zbc_depth[index] = depth;
  77         impl->zbc_clear_depth(priv, index, depth);
  78         return index;
  79 }
  80
  81 int
  82 _nvkm_ltc_init(struct nouveau_object *object)
  83 {
  84         const struct nvkm_ltc_impl *impl = (void *)nv_oclass(object);
  85         struct nvkm_ltc_priv *priv = (void *)object;
  86         int ret, i;
  87
  88         ret = nouveau_subdev_init(&priv->base.base);
  89         if (ret)
  90                 return ret;
  91
  92         for (i = priv->base.zbc_min; i <= priv->base.zbc_max; i++) {
  93                 impl->zbc_clear_color(priv, i, priv->zbc_color[i]);
  94                 impl->zbc_clear_depth(priv, i, priv->zbc_depth[i]);
  95         }
  96
  97         return 0;
  98 }
  99
 100 int
 101 nvkm_ltc_create_(struct nouveau_object *parent, struct nouveau_object *engine,
 102                  struct nouveau_oclass *oclass, int length, void **pobject)
 103 {
 104         const struct nvkm_ltc_impl *impl = (void *)oclass;
 105         struct nvkm_ltc_priv *priv;
 106         int ret;
 107
 108         ret = nouveau_subdev_create_(parent, engine, oclass, 0, "PLTCG",
 109                                      "l2c", length, pobject);
 110         priv = *pobject;
 111         if (ret)
 112                 return ret;
 113
 114         memset(priv->zbc_color, 0x00, sizeof(priv->zbc_color));
 115         memset(priv->zbc_depth, 0x00, sizeof(priv->zbc_depth));
 116
 117         priv->base.base.intr = impl->intr;
 118         priv->base.tags_alloc = nvkm_ltc_tags_alloc;
 119         priv->base.tags_free = nvkm_ltc_tags_free;
 120         priv->base.tags_clear = nvkm_ltc_tags_clear;
 121         priv->base.zbc_min = 1; /* reserve 0 for disabled */
 122         priv->base.zbc_max = min(impl->zbc, NOUVEAU_LTC_MAX_ZBC_CNT) - 1;
 123         priv->base.zbc_color_get = nvkm_ltc_zbc_color_get;
 124         priv->base.zbc_depth_get = nvkm_ltc_zbc_depth_get;
 125         return 0;
 126 }