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 <subdev/fb.h>
  27
  28int
  29nvkm_ltc_tags_alloc(struct nvkm_ltc *ltc, u32 n, struct nvkm_mm_node **pnode)
  30{
  31        int ret = nvkm_mm_head(&ltc->tags, 0, 1, n, n, 1, pnode);
  32        if (ret)
  33                *pnode = NULL;
  34        return ret;
  35}
  36
  37void
  38nvkm_ltc_tags_free(struct nvkm_ltc *ltc, struct nvkm_mm_node **pnode)
  39{
  40        nvkm_mm_free(&ltc->tags, pnode);
  41}
  42
  43void
  44nvkm_ltc_tags_clear(struct nvkm_ltc *ltc, u32 first, u32 count)
  45{
  46        const u32 limit = first + count - 1;
  47
  48        BUG_ON((first > limit) || (limit >= ltc->num_tags));
  49
  50        ltc->func->cbc_clear(ltc, first, limit);
  51        ltc->func->cbc_wait(ltc);
  52}
  53
  54int
  55nvkm_ltc_zbc_color_get(struct nvkm_ltc *ltc, int index, const u32 color[4])
  56{
  57        memcpy(ltc->zbc_color[index], color, sizeof(ltc->zbc_color[index]));
  58        ltc->func->zbc_clear_color(ltc, index, color);
  59        return index;
  60}
  61
  62int
  63nvkm_ltc_zbc_depth_get(struct nvkm_ltc *ltc, int index, const u32 depth)
  64{
  65        ltc->zbc_depth[index] = depth;
  66        ltc->func->zbc_clear_depth(ltc, index, depth);
  67        return index;
  68}
  69
  70void
  71nvkm_ltc_invalidate(struct nvkm_ltc *ltc)
  72{
  73        if (ltc->func->invalidate)
  74                ltc->func->invalidate(ltc);
  75}
  76
  77void
  78nvkm_ltc_flush(struct nvkm_ltc *ltc)
  79{
  80        if (ltc->func->flush)
  81                ltc->func->flush(ltc);
  82}
  83
  84static void
  85nvkm_ltc_intr(struct nvkm_subdev *subdev)
  86{
  87        struct nvkm_ltc *ltc = nvkm_ltc(subdev);
  88        ltc->func->intr(ltc);
  89}
  90
  91static int
  92nvkm_ltc_oneinit(struct nvkm_subdev *subdev)
  93{
  94        struct nvkm_ltc *ltc = nvkm_ltc(subdev);
  95        return ltc->func->oneinit(ltc);
  96}
  97
  98static int
  99nvkm_ltc_init(struct nvkm_subdev *subdev)
 100{
 101        struct nvkm_ltc *ltc = nvkm_ltc(subdev);
 102        int i;
 103
 104        for (i = ltc->zbc_min; i <= ltc->zbc_max; i++) {
 105                ltc->func->zbc_clear_color(ltc, i, ltc->zbc_color[i]);
 106                ltc->func->zbc_clear_depth(ltc, i, ltc->zbc_depth[i]);
 107        }
 108
 109        ltc->func->init(ltc);
 110        return 0;
 111}
 112
 113static void *
 114nvkm_ltc_dtor(struct nvkm_subdev *subdev)
 115{
 116        struct nvkm_ltc *ltc = nvkm_ltc(subdev);
 117        struct nvkm_ram *ram = ltc->subdev.device->fb->ram;
 118        nvkm_mm_fini(&ltc->tags);
 119        if (ram)
 120                nvkm_mm_free(&ram->vram, &ltc->tag_ram);
 121        return ltc;
 122}
 123
 124static const struct nvkm_subdev_func
 125nvkm_ltc = {
 126        .dtor = nvkm_ltc_dtor,
 127        .oneinit = nvkm_ltc_oneinit,
 128        .init = nvkm_ltc_init,
 129        .intr = nvkm_ltc_intr,
 130};
 131
 132int
 133nvkm_ltc_new_(const struct nvkm_ltc_func *func, struct nvkm_device *device,
 134              int index, struct nvkm_ltc **pltc)
 135{
 136        struct nvkm_ltc *ltc;
 137
 138        if (!(ltc = *pltc = kzalloc(sizeof(*ltc), GFP_KERNEL)))
 139                return -ENOMEM;
 140
 141        nvkm_subdev_ctor(&nvkm_ltc, device, index, 0, &ltc->subdev);
 142        ltc->func = func;
 143        ltc->zbc_min = 1; /* reserve 0 for disabled */
 144        ltc->zbc_max = min(func->zbc, NVKM_LTC_MAX_ZBC_CNT) - 1;
 145        return 0;
 146}
 147