src/gallium/drivers/nv50/nv50_miptree.c

   1 /*
   2  * Copyright 2008 Ben Skeggs
   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 AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  18  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  19  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  20  * SOFTWARE.
  21  */
  22
  23 #include "pipe/p_state.h"
  24 #include "pipe/p_defines.h"
  25 #include "pipe/p_inlines.h"
  26
  27 #include "nv50_context.h"
  28
  29 static struct pipe_texture *
  30 nv50_miptree_create(struct pipe_screen *pscreen, const struct pipe_texture *tmp)
  31 {
  32         struct pipe_winsys *ws = pscreen->winsys;
  33         struct nv50_miptree *mt = CALLOC_STRUCT(nv50_miptree);
  34         struct pipe_texture *pt = &mt->base;
  35         unsigned usage, width = tmp->width[0], height = tmp->height[0];
  36         unsigned depth = tmp->depth[0];
  37         int i, l;
  38
  39         mt->base = *tmp;
  40         mt->base.refcount = 1;
  41         mt->base.screen = pscreen;
  42
  43         usage = PIPE_BUFFER_USAGE_PIXEL;
  44         switch (pt->format) {
  45         case PIPE_FORMAT_Z24S8_UNORM:
  46         case PIPE_FORMAT_Z16_UNORM:
  47                 usage |= NOUVEAU_BUFFER_USAGE_ZETA;
  48                 break;
  49         default:
  50                 break;
  51         }
  52
  53         switch (pt->target) {
  54         case PIPE_TEXTURE_3D:
  55                 mt->image_nr = pt->depth[0];
  56                 break;
  57         case PIPE_TEXTURE_CUBE:
  58                 mt->image_nr = 6;
  59                 break;
  60         default:
  61                 mt->image_nr = 1;
  62                 break;
  63         }
  64
  65         for (l = 0; l <= pt->last_level; l++) {
  66                 struct nv50_miptree_level *lvl = &mt->level[l];
  67
  68                 pt->width[l] = width;
  69                 pt->height[l] = height;
  70                 pt->depth[l] = depth;
  71                 pt->nblocksx[l] = pf_get_nblocksx(&pt->block, width);
  72                 pt->nblocksy[l] = pf_get_nblocksy(&pt->block, height);
  73
  74                 lvl->image_offset = CALLOC(mt->image_nr, sizeof(int));
  75                 lvl->image = CALLOC(mt->image_nr, sizeof(struct pipe_buffer *));
  76
  77                 width = MAX2(1, width >> 1);
  78                 height = MAX2(1, height >> 1);
  79                 depth = MAX2(1, depth >> 1);
  80         }
  81
  82         for (i = 0; i < mt->image_nr; i++) {
  83                 for (l = 0; l <= pt->last_level; l++) {
  84                         struct nv50_miptree_level *lvl = &mt->level[l];
  85                         int size;
  86
  87                         size  = align(pt->width[l], 8) * pt->block.size;
  88                         size  = align(size, 64);
  89                         size *= align(pt->height[l], 8) * pt->block.size;
  90
  91                         lvl->image[i] = ws->buffer_create(ws, 256, 0, size);
  92                         lvl->image_offset[i] = mt->total_size;
  93
  94                         mt->total_size += size;
  95                 }
  96         }
  97
  98         mt->buffer = ws->buffer_create(ws, 256, usage, mt->total_size);
  99         if (!mt->buffer) {
 100                 FREE(mt);
 101                 return NULL;
 102         }
 103
 104         return &mt->base;
 105 }
 106
 107 static INLINE void
 108 mark_dirty(uint32_t *flags, unsigned image)
 109 {
 110         flags[image / 32] |= (1 << (image % 32));
 111 }
 112
 113 static INLINE void
 114 mark_clean(uint32_t *flags, unsigned image)
 115 {
 116         flags[image / 32] &= ~(1 << (image % 32));
 117 }
 118
 119 static INLINE int
 120 is_dirty(uint32_t *flags, unsigned image)
 121 {
 122         return !!(flags[image / 32] & (1 << (image % 32)));
 123 }
 124
 125 static void
 126 nv50_miptree_release(struct pipe_screen *pscreen, struct pipe_texture **ppt)
 127 {
 128         struct pipe_texture *pt = *ppt;
 129
 130         *ppt = NULL;
 131
 132         if (--pt->refcount <= 0) {
 133                 struct nv50_miptree *mt = nv50_miptree(pt);
 134
 135                 pipe_buffer_reference(pscreen, &mt->buffer, NULL);
 136                 FREE(mt);
 137         }
 138 }
 139
 140 void
 141 nv50_miptree_sync(struct pipe_screen *pscreen, struct nv50_miptree *mt,
 142                   unsigned level, unsigned image)
 143 {
 144         struct nouveau_winsys *nvws = nv50_screen(pscreen)->nvws;
 145         struct nv50_miptree_level *lvl = &mt->level[level];
 146         struct pipe_surface *dst, *src;
 147         unsigned face = 0, zslice = 0;
 148
 149         if (!is_dirty(lvl->image_dirty_cpu, image))
 150                 return;
 151
 152         if (mt->base.target == PIPE_TEXTURE_CUBE)
 153                 face = image;
 154         else
 155         if (mt->base.target == PIPE_TEXTURE_3D)
 156                 zslice = image;
 157
 158         /* Mark as clean already - so we don't continually call this function
 159          * trying to get a GPU_WRITE pipe_surface!
 160          */
 161         mark_clean(lvl->image_dirty_cpu, image);
 162
 163         /* Pretend we're doing CPU access so we get the backing pipe_surface
 164          * and not a view into the larger miptree.
 165          */
 166         src = pscreen->get_tex_surface(pscreen, &mt->base, face, level, zslice,
 167                                        PIPE_BUFFER_USAGE_CPU_READ);
 168
 169         /* Pretend we're only reading with the GPU so surface doesn't get marked
 170          * as dirtied by the GPU.
 171          */
 172         dst = pscreen->get_tex_surface(pscreen, &mt->base, face, level, zslice,
 173                                        PIPE_BUFFER_USAGE_GPU_READ);
 174
 175         nvws->surface_copy(nvws, dst, 0, 0, src, 0, 0, dst->width, dst->height);
 176
 177         pscreen->tex_surface_release(pscreen, &dst);
 178         pscreen->tex_surface_release(pscreen, &src);
 179 }
 180
 181 /* The reverse of the above */
 182 void
 183 nv50_miptree_sync_cpu(struct pipe_screen *pscreen, struct nv50_miptree *mt,
 184                       unsigned level, unsigned image)
 185 {
 186         struct nouveau_winsys *nvws = nv50_screen(pscreen)->nvws;
 187         struct nv50_miptree_level *lvl = &mt->level[level];
 188         struct pipe_surface *dst, *src;
 189         unsigned face = 0, zslice = 0;
 190
 191         if (!is_dirty(lvl->image_dirty_gpu, image))
 192                 return;
 193
 194         if (mt->base.target == PIPE_TEXTURE_CUBE)
 195                 face = image;
 196         else
 197         if (mt->base.target == PIPE_TEXTURE_3D)
 198                 zslice = image;
 199
 200         mark_clean(lvl->image_dirty_gpu, image);
 201
 202         src = pscreen->get_tex_surface(pscreen, &mt->base, face, level, zslice,
 203                                        PIPE_BUFFER_USAGE_GPU_READ);
 204         dst = pscreen->get_tex_surface(pscreen, &mt->base, face, level, zslice,
 205                                        PIPE_BUFFER_USAGE_CPU_READ);
 206
 207         nvws->surface_copy(nvws, dst, 0, 0, src, 0, 0, dst->width, dst->height);
 208
 209         pscreen->tex_surface_release(pscreen, &dst);
 210         pscreen->tex_surface_release(pscreen, &src);
 211 }
 212
 213 static struct pipe_surface *
 214 nv50_miptree_surface_new(struct pipe_screen *pscreen, struct pipe_texture *pt,
 215                          unsigned face, unsigned level, unsigned zslice,
 216                          unsigned flags)
 217 {
 218         struct nv50_miptree *mt = nv50_miptree(pt);
 219         struct nv50_miptree_level *lvl = &mt->level[level];
 220         struct pipe_surface *ps;
 221         int img;
 222
 223         if (pt->target == PIPE_TEXTURE_CUBE)
 224                 img = face;
 225         else
 226         if (pt->target == PIPE_TEXTURE_3D)
 227                 img = zslice;
 228         else
 229                 img = 0;
 230
 231         ps = CALLOC_STRUCT(pipe_surface);
 232         if (!ps)
 233                 return NULL;
 234         pipe_texture_reference(&ps->texture, pt);
 235         pipe_buffer_reference(pscreen, &ps->buffer, mt->buffer);
 236         ps->format = pt->format;
 237         ps->width = pt->width[level];
 238         ps->height = pt->height[level];
 239         ps->block = pt->block;
 240         ps->nblocksx = pt->nblocksx[level];
 241         ps->nblocksy = pt->nblocksy[level];
 242         ps->stride = ps->width * ps->block.size;
 243         ps->usage = flags;
 244         ps->status = PIPE_SURFACE_STATUS_DEFINED;
 245         ps->refcount = 1;
 246         ps->face = face;
 247         ps->level = level;
 248         ps->zslice = zslice;
 249
 250         if (flags & PIPE_BUFFER_USAGE_CPU_READ_WRITE) {
 251                 assert(!(flags & PIPE_BUFFER_USAGE_GPU_READ_WRITE));
 252                 nv50_miptree_sync_cpu(pscreen, mt, level, img);
 253
 254                 ps->offset = 0;
 255                 pipe_texture_reference(&ps->texture, pt);
 256                 pipe_buffer_reference(pscreen, &ps->buffer, lvl->image[img]);
 257
 258                 if (flags & PIPE_BUFFER_USAGE_CPU_WRITE)
 259                         mark_dirty(lvl->image_dirty_cpu, img);
 260         } else {
 261                 nv50_miptree_sync(pscreen, mt, level, img);
 262
 263                 ps->offset = lvl->image_offset[img];
 264                 pipe_texture_reference(&ps->texture, pt);
 265                 pipe_buffer_reference(pscreen, &ps->buffer, mt->buffer);
 266
 267                 if (flags & PIPE_BUFFER_USAGE_GPU_WRITE)
 268                         mark_dirty(lvl->image_dirty_gpu, img);
 269         }
 270
 271         return ps;
 272 }
 273
 274 static void
 275 nv50_miptree_surface_del(struct pipe_screen *pscreen,
 276                          struct pipe_surface **psurface)
 277 {
 278         struct pipe_surface *ps = *psurface;
 279         struct nv50_surface *s = nv50_surface(ps);
 280
 281         *psurface = NULL;
 282
 283         if (--ps->refcount <= 0) {
 284                 pipe_texture_reference(&ps->texture, NULL);
 285                 pipe_buffer_reference(pscreen, &ps->buffer, NULL);
 286                 FREE(s);
 287         }
 288 }
 289
 290 void
 291 nv50_screen_init_miptree_functions(struct pipe_screen *pscreen)
 292 {
 293         pscreen->texture_create = nv50_miptree_create;
 294         pscreen->texture_release = nv50_miptree_release;
 295         pscreen->get_tex_surface = nv50_miptree_surface_new;
 296         pscreen->tex_surface_release = nv50_miptree_surface_del;
 297 }
 298