src/gallium/drivers/r300/r300_transfer.c

   1 /*
   2  * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  * Copyright 2010 Marek Olšák <maraeo@gmail.com>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  23
  24 #include "r300_context.h"
  25 #include "r300_transfer.h"
  26 #include "r300_texture.h"
  27 #include "r300_screen.h"
  28
  29 #include "r300_winsys.h"
  30
  31 #include "util/u_memory.h"
  32 #include "util/u_format.h"
  33
  34 struct r300_transfer {
  35     /* Parent class */
  36     struct pipe_transfer transfer;
  37
  38     /* Pipe context. */
  39     struct pipe_context *ctx;
  40
  41     /* Parameters of get_tex_transfer. */
  42     unsigned x, y, level, zslice, face;
  43
  44     /* Offset from start of buffer. */
  45     unsigned offset;
  46
  47     /* Detiled texture. */
  48     struct r300_texture *detiled_texture;
  49
  50     /* Transfer and format flags. */
  51     unsigned buffer_usage, render_target_usage;
  52 };
  53
  54 /* Convenience cast wrapper. */
  55 static INLINE struct r300_transfer*
  56 r300_transfer(struct pipe_transfer* transfer)
  57 {
  58     return (struct r300_transfer*)transfer;
  59 }
  60
  61 /* Copy from a tiled texture to a detiled one. */
  62 static void r300_copy_from_tiled_texture(struct pipe_context *ctx,
  63                                          struct r300_transfer *r300transfer)
  64 {
  65     struct pipe_screen *screen = ctx->screen;
  66     struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
  67     struct pipe_texture *tex = transfer->texture;
  68     struct pipe_surface *src, *dst;
  69
  70     src = screen->get_tex_surface(screen, tex, r300transfer->face,
  71                                   r300transfer->level, r300transfer->zslice,
  72                                   PIPE_BUFFER_USAGE_GPU_READ |
  73                                   PIPE_BUFFER_USAGE_PIXEL);
  74
  75     dst = screen->get_tex_surface(screen, &r300transfer->detiled_texture->tex,
  76                                   0, 0, 0,
  77                                   PIPE_BUFFER_USAGE_GPU_WRITE |
  78                                   PIPE_BUFFER_USAGE_PIXEL |
  79                                   r300transfer->buffer_usage);
  80
  81     ctx->surface_copy(ctx, dst, 0, 0, src, r300transfer->x, r300transfer->y,
  82                       transfer->width, transfer->height);
  83
  84     pipe_surface_reference(&src, NULL);
  85     pipe_surface_reference(&dst, NULL);
  86 }
  87
  88 /* Copy a detiled texture to a tiled one. */
  89 static void r300_copy_into_tiled_texture(struct pipe_context *ctx,
  90                                          struct r300_transfer *r300transfer)
  91 {
  92     struct pipe_screen *screen = ctx->screen;
  93     struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
  94     struct pipe_texture *tex = transfer->texture;
  95     struct pipe_surface *src, *dst;
  96
  97     src = screen->get_tex_surface(screen, &r300transfer->detiled_texture->tex,
  98                                   0, 0, 0,
  99                                   PIPE_BUFFER_USAGE_GPU_READ |
 100                                   PIPE_BUFFER_USAGE_PIXEL);
 101
 102     dst = screen->get_tex_surface(screen, tex, r300transfer->face,
 103                                   r300transfer->level, r300transfer->zslice,
 104                                   PIPE_BUFFER_USAGE_GPU_WRITE |
 105                                   PIPE_BUFFER_USAGE_PIXEL);
 106
 107     /* XXX this flush prevents the following DRM error from occuring:
 108      * [drm:radeon_cs_ioctl] *ERROR* Failed to parse relocation !
 109      * Reproducible with perf/copytex. */
 110     ctx->flush(ctx, 0, NULL);
 111
 112     ctx->surface_copy(ctx, dst, r300transfer->x, r300transfer->y, src, 0, 0,
 113                       transfer->width, transfer->height);
 114
 115     /* XXX this flush fixes a few piglit tests (e.g. glean/pixelFormats). */
 116     ctx->flush(ctx, 0, NULL);
 117
 118     pipe_surface_reference(&src, NULL);
 119     pipe_surface_reference(&dst, NULL);
 120 }
 121
 122 static struct pipe_transfer*
 123 r300_get_tex_transfer(struct pipe_context *ctx,
 124                       struct pipe_texture *texture,
 125                       unsigned face, unsigned level, unsigned zslice,
 126                       enum pipe_transfer_usage usage, unsigned x, unsigned y,
 127                       unsigned w, unsigned h)
 128 {
 129     struct r300_texture *tex = (struct r300_texture *)texture;
 130     struct r300_screen *r300screen = r300_screen(ctx->screen);
 131     struct r300_transfer *trans;
 132     struct pipe_texture template;
 133
 134     trans = CALLOC_STRUCT(r300_transfer);
 135     if (trans) {
 136         /* Initialize the transfer object. */
 137         pipe_texture_reference(&trans->transfer.texture, texture);
 138         trans->transfer.usage = usage;
 139         trans->transfer.width = w;
 140         trans->transfer.height = h;
 141         trans->ctx = ctx;
 142         trans->x = x;
 143         trans->y = y;
 144         trans->level = level;
 145         trans->zslice = zslice;
 146         trans->face = face;
 147
 148         /* If the texture is tiled, we must create a temporary detiled texture
 149          * for this transfer. */
 150         if (tex->microtile || tex->macrotile) {
 151             trans->buffer_usage = pipe_transfer_buffer_flags(&trans->transfer);
 152             trans->render_target_usage =
 153                 util_format_is_depth_or_stencil(texture->format) ?
 154                 PIPE_TEXTURE_USAGE_DEPTH_STENCIL :
 155                 PIPE_TEXTURE_USAGE_RENDER_TARGET;
 156
 157             template.target = PIPE_TEXTURE_2D;
 158             template.format = texture->format;
 159             template.width0 = w;
 160             template.height0 = h;
 161             template.depth0 = 0;
 162             template.last_level = 0;
 163             template.nr_samples = 0;
 164             template.tex_usage = PIPE_TEXTURE_USAGE_DYNAMIC |
 165                                  R300_TEXTURE_USAGE_TRANSFER;
 166
 167             /* For texture reading, the temporary (detiled) texture is used as
 168              * a render target when blitting from a tiled texture. */
 169             if (usage & PIPE_TRANSFER_READ) {
 170                 template.tex_usage |= trans->render_target_usage;
 171             }
 172             /* For texture writing, the temporary texture is used as a sampler
 173              * when blitting into a tiled texture. */
 174             if (usage & PIPE_TRANSFER_WRITE) {
 175                 template.tex_usage |= PIPE_TEXTURE_USAGE_SAMPLER;
 176             }
 177
 178             /* Create the temporary texture. */
 179             trans->detiled_texture = (struct r300_texture*)
 180                ctx->screen->texture_create(ctx->screen,
 181                                            &template);
 182
 183             assert(!trans->detiled_texture->microtile &&
 184                    !trans->detiled_texture->macrotile);
 185
 186             /* Set the stride.
 187              * Parameters x, y, level, zslice, and face remain zero. */
 188             trans->transfer.stride =
 189                 r300_texture_get_stride(r300screen, trans->detiled_texture, 0);
 190
 191             if (usage & PIPE_TRANSFER_READ) {
 192                 /* We cannot map a tiled texture directly because the data is
 193                  * in a different order, therefore we do detiling using a blit. */
 194                 r300_copy_from_tiled_texture(ctx, trans);
 195             }
 196         } else {
 197             trans->transfer.x = x;
 198             trans->transfer.y = y;
 199             trans->transfer.stride =
 200                 r300_texture_get_stride(r300screen, tex, level);
 201             trans->transfer.level = level;
 202             trans->transfer.zslice = zslice;
 203             trans->transfer.face = face;
 204             trans->offset = r300_texture_get_offset(tex, level, zslice, face);
 205         }
 206     }
 207     return &trans->transfer;
 208 }
 209
 210 static void r300_tex_transfer_destroy(struct pipe_context *ctx,
 211                                       struct pipe_transfer *trans)
 212 {
 213     struct r300_transfer *r300transfer = r300_transfer(trans);
 214
 215     if (r300transfer->detiled_texture) {
 216         if (trans->usage & PIPE_TRANSFER_WRITE) {
 217             r300_copy_into_tiled_texture(r300transfer->ctx, r300transfer);
 218         }
 219
 220         pipe_texture_reference(
 221             (struct pipe_texture**)&r300transfer->detiled_texture, NULL);
 222     }
 223     pipe_texture_reference(&trans->texture, NULL);
 224     FREE(trans);
 225 }
 226
 227 static void* r300_transfer_map(struct pipe_context *ctx,
 228                                struct pipe_transfer *transfer)
 229 {
 230     struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
 231     struct r300_transfer *r300transfer = r300_transfer(transfer);
 232     struct r300_texture *tex = (struct r300_texture*)transfer->texture;
 233     char *map;
 234     enum pipe_format format = tex->tex.format;
 235
 236     if (r300transfer->detiled_texture) {
 237         /* The detiled texture is of the same size as the region being mapped
 238          * (no offset needed). */
 239         return rws->buffer_map(rws,
 240                                r300transfer->detiled_texture->buffer,
 241                                pipe_transfer_buffer_flags(transfer));
 242     } else {
 243         /* Tiling is disabled. */
 244         map = rws->buffer_map(rws, tex->buffer,
 245                               pipe_transfer_buffer_flags(transfer));
 246
 247         if (!map) {
 248             return NULL;
 249         }
 250
 251         return map + r300_transfer(transfer)->offset +
 252             transfer->y / util_format_get_blockheight(format) * transfer->stride +
 253             transfer->x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 254     }
 255 }
 256
 257 static void r300_transfer_unmap(struct pipe_context *ctx,
 258                                 struct pipe_transfer *transfer)
 259 {
 260     struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
 261     struct r300_transfer *r300transfer = r300_transfer(transfer);
 262     struct r300_texture *tex = (struct r300_texture*)transfer->texture;
 263
 264     if (r300transfer->detiled_texture) {
 265         rws->buffer_unmap(rws, r300transfer->detiled_texture->buffer);
 266     } else {
 267         rws->buffer_unmap(rws, tex->buffer);
 268     }
 269 }
 270
 271
 272 void r300_init_transfer_functions( struct r300_context *r300ctx )
 273 {
 274    struct pipe_context *ctx = &r300ctx->context;
 275
 276    ctx->get_tex_transfer = r300_get_tex_transfer;
 277    ctx->tex_transfer_destroy = r300_tex_transfer_destroy;
 278    ctx->transfer_map = r300_transfer_map;
 279    ctx->transfer_unmap = r300_transfer_unmap;
 280 }