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
  28 void
  29 nvkm_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->subdev.mutex);
  37         ltc->func->cbc_clear(ltc, first, limit);
  38         ltc->func->cbc_wait(ltc);
  39         mutex_unlock(&ltc->subdev.mutex);
  40 }
  41
  42 int
  43 nvkm_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
  50 int
  51 nvkm_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
  58 void
  59 nvkm_ltc_invalidate(struct nvkm_ltc *ltc)
  60 {
  61         if (ltc->func->invalidate)
  62                 ltc->func->invalidate(ltc);
  63 }
  64
  65 void
  66 nvkm_ltc_flush(struct nvkm_ltc *ltc)
  67 {
  68         if (ltc->func->flush)
  69                 ltc->func->flush(ltc);
  70 }
  71
  72 static void
  73 nvkm_ltc_intr(struct nvkm_subdev *subdev)
  74 {
  75         struct nvkm_ltc *ltc = nvkm_ltc(subdev);
  76         ltc->func->intr(ltc);
  77 }
  78
  79 static int
  80 nvkm_ltc_oneinit(struct nvkm_subdev *subdev)
  81 {
  82         struct nvkm_ltc *ltc = nvkm_ltc(subdev);
  83         return ltc->func->oneinit(ltc);
  84 }
  85
  86 static int
  87 nvkm_ltc_init(struct nvkm_subdev *subdev)
  88 {
  89         struct nvkm_ltc *ltc = nvkm_ltc(subdev);
  90         int i;
  91
  92         for (i = ltc->zbc_min; i <= ltc->zbc_max; i++) {
  93                 ltc->func->zbc_clear_color(ltc, i, ltc->zbc_color[i]);
  94                 ltc->func->zbc_clear_depth(ltc, i, ltc->zbc_depth[i]);
  95         }
  96
  97         ltc->func->init(ltc);
  98         return 0;
  99 }
 100
 101 static void *
 102 nvkm_ltc_dtor(struct nvkm_subdev *subdev)
 103 {
 104         struct nvkm_ltc *ltc = nvkm_ltc(subdev);
 105         nvkm_memory_unref(&ltc->tag_ram);
 106         return ltc;
 107 }
 108
 109 static const struct nvkm_subdev_func
 110 nvkm_ltc = {
 111         .dtor = nvkm_ltc_dtor,
 112         .oneinit = nvkm_ltc_oneinit,
 113         .init = nvkm_ltc_init,
 114         .intr = nvkm_ltc_intr,
 115 };
 116
 117 int
 118 nvkm_ltc_new_(const struct nvkm_ltc_func *func, struct nvkm_device *device,
 119               int index, struct nvkm_ltc **pltc)
 120 {
 121         struct nvkm_ltc *ltc;
 122
 123         if (!(ltc = *pltc = kzalloc(sizeof(*ltc), GFP_KERNEL)))
 124                 return -ENOMEM;
 125
 126         nvkm_subdev_ctor(&nvkm_ltc, device, index, &ltc->subdev);
 127         ltc->func = func;
 128         ltc->zbc_min = 1; /* reserve 0 for disabled */
 129         ltc->zbc_max = min(func->zbc, NVKM_LTC_MAX_ZBC_CNT) - 1;
 130         return 0;
 131 }