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
  28 int
  29 nvkm_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
  37 void
  38 nvkm_ltc_tags_free(struct nvkm_ltc *ltc, struct nvkm_mm_node **pnode)
  39 {
  40         nvkm_mm_free(&ltc->tags, pnode);
  41 }
  42
  43 void
  44 nvkm_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
  54 int
  55 nvkm_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
  62 int
  63 nvkm_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
  70 void
  71 nvkm_ltc_invalidate(struct nvkm_ltc *ltc)
  72 {
  73         if (ltc->func->invalidate)
  74                 ltc->func->invalidate(ltc);
  75 }
  76
  77 void
  78 nvkm_ltc_flush(struct nvkm_ltc *ltc)
  79 {
  80         if (ltc->func->flush)
  81                 ltc->func->flush(ltc);
  82 }
  83
  84 static void
  85 nvkm_ltc_intr(struct nvkm_subdev *subdev)
  86 {
  87         struct nvkm_ltc *ltc = nvkm_ltc(subdev);
  88         ltc->func->intr(ltc);
  89 }
  90
  91 static int
  92 nvkm_ltc_oneinit(struct nvkm_subdev *subdev)
  93 {
  94         struct nvkm_ltc *ltc = nvkm_ltc(subdev);
  95         return ltc->func->oneinit(ltc);
  96 }
  97
  98 static int
  99 nvkm_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
 113 static void *
 114 nvkm_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
 124 static const struct nvkm_subdev_func
 125 nvkm_ltc = {
 126         .dtor = nvkm_ltc_dtor,
 127         .oneinit = nvkm_ltc_oneinit,
 128         .init = nvkm_ltc_init,
 129         .intr = nvkm_ltc_intr,
 130 };
 131
 132 int
 133 nvkm_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 }