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
  26#include <core/memory.h>
  27
  28void
  29nvkm_ltc_tags_clear(struct nvkm_device *device, u32 first, u32 count)
  30{
  31        struct nvkm_ltc *ltc = device->ltc;
  32        const u32 limit = first + count - 1;
  33
  34        BUG_ON((first > limit) || (limit >= ltc->num_tags));
  35
  36        mutex_lock(&ltc->mutex);
  37        ltc->func->cbc_clear(ltc, first, limit);
  38        ltc->func->cbc_wait(ltc);
  39        mutex_unlock(&ltc->mutex);
  40}
  41
  42int
  43nvkm_ltc_zbc_color_get(struct nvkm_ltc *ltc, int index, const u32 color[4])
  44{
  45        memcpy(ltc->zbc_color[index], color, sizeof(ltc->zbc_color[index]));
  46        ltc->func->zbc_clear_color(ltc, index, color);
  47        return index;
  48}
  49
  50int
  51nvkm_ltc_zbc_depth_get(struct nvkm_ltc *ltc, int index, const u32 depth)
  52{
  53        ltc->zbc_depth[index] = depth;
  54        ltc->func->zbc_clear_depth(ltc, index, depth);
  55        return index;
  56}
  57
  58int
  59nvkm_ltc_zbc_stencil_get(struct nvkm_ltc *ltc, int index, const u32 stencil)
  60{
  61        ltc->zbc_stencil[index] = stencil;
  62        ltc->func->zbc_clear_stencil(ltc, index, stencil);
  63        return index;
  64}
  65
  66void
  67nvkm_ltc_invalidate(struct nvkm_ltc *ltc)
  68{
  69        if (ltc->func->invalidate)
  70                ltc->func->invalidate(ltc);
  71}
  72
  73void
  74nvkm_ltc_flush(struct nvkm_ltc *ltc)
  75{
  76        if (ltc->func->flush)
  77                ltc->func->flush(ltc);
  78}
  79
  80static void
  81nvkm_ltc_intr(struct nvkm_subdev *subdev)
  82{
  83        struct nvkm_ltc *ltc = nvkm_ltc(subdev);
  84        ltc->func->intr(ltc);
  85}
  86
  87static int
  88nvkm_ltc_oneinit(struct nvkm_subdev *subdev)
  89{
  90        struct nvkm_ltc *ltc = nvkm_ltc(subdev);
  91        return ltc->func->oneinit(ltc);
  92}
  93
  94static int
  95nvkm_ltc_init(struct nvkm_subdev *subdev)
  96{
  97        struct nvkm_ltc *ltc = nvkm_ltc(subdev);
  98        int i;
  99
 100        for (i = ltc->zbc_min; i <= ltc->zbc_max; i++) {
 101                ltc->func->zbc_clear_color(ltc, i, ltc->zbc_color[i]);
 102                ltc->func->zbc_clear_depth(ltc, i, ltc->zbc_depth[i]);
 103                if (ltc->func->zbc_clear_stencil)
 104                        ltc->func->zbc_clear_stencil(ltc, i, ltc->zbc_stencil[i]);
 105        }
 106
 107        ltc->func->init(ltc);
 108        return 0;
 109}
 110
 111static void *
 112nvkm_ltc_dtor(struct nvkm_subdev *subdev)
 113{
 114        struct nvkm_ltc *ltc = nvkm_ltc(subdev);
 115        nvkm_memory_unref(&ltc->tag_ram);
 116        mutex_destroy(&ltc->mutex);
 117        return ltc;
 118}
 119
 120static const struct nvkm_subdev_func
 121nvkm_ltc = {
 122        .dtor = nvkm_ltc_dtor,
 123        .oneinit = nvkm_ltc_oneinit,
 124        .init = nvkm_ltc_init,
 125        .intr = nvkm_ltc_intr,
 126};
 127
 128int
 129nvkm_ltc_new_(const struct nvkm_ltc_func *func, struct nvkm_device *device,
 130              enum nvkm_subdev_type type, int inst, struct nvkm_ltc **pltc)
 131{
 132        struct nvkm_ltc *ltc;
 133
 134        if (!(ltc = *pltc = kzalloc(sizeof(*ltc), GFP_KERNEL)))
 135                return -ENOMEM;
 136
 137        nvkm_subdev_ctor(&nvkm_ltc, device, type, inst, &ltc->subdev);
 138        ltc->func = func;
 139        mutex_init(&ltc->mutex);
 140        ltc->zbc_min = 1; /* reserve 0 for disabled */
 141        ltc->zbc_max = min(func->zbc, NVKM_LTC_MAX_ZBC_CNT) - 1;
 142        return 0;
 143}
 144