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 #include <subdev/fb.h>
  28
  29 int
  30 nvkm_ltc_tags_alloc(struct nvkm_ltc *ltc, u32 n, struct nvkm_mm_node **pnode)
  31 {
  32         struct nvkm_fb *fb = ltc->subdev.device->fb;
  33         int ret = nvkm_mm_head(&fb->tags, 0, 1, n, n, 1, pnode);
  34         if (ret)
  35                 *pnode = NULL;
  36         return ret;
  37 }
  38
  39 void
  40 nvkm_ltc_tags_free(struct nvkm_ltc *ltc, struct nvkm_mm_node **pnode)
  41 {
  42         struct nvkm_fb *fb = ltc->subdev.device->fb;
  43         nvkm_mm_free(&fb->tags, pnode);
  44 }
  45
  46 void
  47 nvkm_ltc_tags_clear(struct nvkm_device *device, u32 first, u32 count)
  48 {
  49         struct nvkm_ltc *ltc = device->ltc;
  50         const u32 limit = first + count - 1;
  51
  52         BUG_ON((first > limit) || (limit >= ltc->num_tags));
  53
  54         mutex_lock(&ltc->subdev.mutex);
  55         ltc->func->cbc_clear(ltc, first, limit);
  56         ltc->func->cbc_wait(ltc);
  57         mutex_unlock(&ltc->subdev.mutex);
  58 }
  59
  60 int
  61 nvkm_ltc_zbc_color_get(struct nvkm_ltc *ltc, int index, const u32 color[4])
  62 {
  63         memcpy(ltc->zbc_color[index], color, sizeof(ltc->zbc_color[index]));
  64         ltc->func->zbc_clear_color(ltc, index, color);
  65         return index;
  66 }
  67
  68 int
  69 nvkm_ltc_zbc_depth_get(struct nvkm_ltc *ltc, int index, const u32 depth)
  70 {
  71         ltc->zbc_depth[index] = depth;
  72         ltc->func->zbc_clear_depth(ltc, index, depth);
  73         return index;
  74 }
  75
  76 void
  77 nvkm_ltc_invalidate(struct nvkm_ltc *ltc)
  78 {
  79         if (ltc->func->invalidate)
  80                 ltc->func->invalidate(ltc);
  81 }
  82
  83 void
  84 nvkm_ltc_flush(struct nvkm_ltc *ltc)
  85 {
  86         if (ltc->func->flush)
  87                 ltc->func->flush(ltc);
  88 }
  89
  90 static void
  91 nvkm_ltc_intr(struct nvkm_subdev *subdev)
  92 {
  93         struct nvkm_ltc *ltc = nvkm_ltc(subdev);
  94         ltc->func->intr(ltc);
  95 }
  96
  97 static int
  98 nvkm_ltc_oneinit(struct nvkm_subdev *subdev)
  99 {
 100         struct nvkm_ltc *ltc = nvkm_ltc(subdev);
 101         return ltc->func->oneinit(ltc);
 102 }
 103
 104 static int
 105 nvkm_ltc_init(struct nvkm_subdev *subdev)
 106 {
 107         struct nvkm_ltc *ltc = nvkm_ltc(subdev);
 108         int i;
 109
 110         for (i = ltc->zbc_min; i <= ltc->zbc_max; i++) {
 111                 ltc->func->zbc_clear_color(ltc, i, ltc->zbc_color[i]);
 112                 ltc->func->zbc_clear_depth(ltc, i, ltc->zbc_depth[i]);
 113         }
 114
 115         ltc->func->init(ltc);
 116         return 0;
 117 }
 118
 119 static void *
 120 nvkm_ltc_dtor(struct nvkm_subdev *subdev)
 121 {
 122         struct nvkm_ltc *ltc = nvkm_ltc(subdev);
 123         nvkm_memory_unref(&ltc->tag_ram);
 124         return ltc;
 125 }
 126
 127 static const struct nvkm_subdev_func
 128 nvkm_ltc = {
 129         .dtor = nvkm_ltc_dtor,
 130         .oneinit = nvkm_ltc_oneinit,
 131         .init = nvkm_ltc_init,
 132         .intr = nvkm_ltc_intr,
 133 };
 134
 135 int
 136 nvkm_ltc_new_(const struct nvkm_ltc_func *func, struct nvkm_device *device,
 137               int index, struct nvkm_ltc **pltc)
 138 {
 139         struct nvkm_ltc *ltc;
 140
 141         if (!(ltc = *pltc = kzalloc(sizeof(*ltc), GFP_KERNEL)))
 142                 return -ENOMEM;
 143
 144         nvkm_subdev_ctor(&nvkm_ltc, device, index, &ltc->subdev);
 145         ltc->func = func;
 146         ltc->zbc_min = 1; /* reserve 0 for disabled */
 147         ltc->zbc_max = min(func->zbc, NVKM_LTC_MAX_ZBC_CNT) - 1;
 148         return 0;
 149 }