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