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 "util/u_memory.h"
  30 #include "util/u_format.h"
  31
  32 struct r300_transfer {
  33     /* Parent class */
  34     struct pipe_transfer transfer;
  35
  36     /* Pipe context. */
  37     struct pipe_context *ctx;
  38
  39     /* Parameters of get_tex_transfer. */
  40     unsigned x, y, level, zslice, face;
  41
  42     /* Offset from start of buffer. */
  43     unsigned offset;
  44
  45     /* Detiled texture. */
  46     struct r300_texture *detiled_texture;
  47
  48     /* Transfer and format flags. */
  49     unsigned buffer_usage, render_target_usage;
  50 };
  51
  52 /* Convenience cast wrapper. */
  53 static INLINE struct r300_transfer*
  54 r300_transfer(struct pipe_transfer* transfer)
  55 {
  56     return (struct r300_transfer*)transfer;
  57 }
  58
  59 /* Copy from a tiled texture to a detiled one. */
  60 static void r300_copy_from_tiled_texture(struct pipe_context *ctx,
  61                                          struct r300_transfer *r300transfer)
  62 {
  63     struct pipe_screen *screen = ctx->screen;
  64     struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
  65     struct pipe_texture *tex = transfer->texture;
  66     struct pipe_surface *src, *dst;
  67
  68     src = screen->get_tex_surface(screen, tex, r300transfer->face,
  69                                   r300transfer->level, r300transfer->zslice,
  70                                   PIPE_BUFFER_USAGE_GPU_READ |
  71                                   PIPE_BUFFER_USAGE_PIXEL);
  72
  73     dst = screen->get_tex_surface(screen, &r300transfer->detiled_texture->tex,
  74                                   0, 0, 0,
  75                                   PIPE_BUFFER_USAGE_GPU_WRITE |
  76                                   PIPE_BUFFER_USAGE_PIXEL |
  77                                   r300transfer->buffer_usage);
  78
  79     ctx->surface_copy(ctx, dst, 0, 0, src, r300transfer->x, r300transfer->y,
  80                       transfer->width, transfer->height);
  81
  82     pipe_surface_reference(&src, NULL);
  83     pipe_surface_reference(&dst, NULL);
  84 }
  85
  86 /* Copy a detiled texture to a tiled one. */
  87 static void r300_copy_into_tiled_texture(struct pipe_context *ctx,
  88                                          struct r300_transfer *r300transfer)
  89 {
  90     struct pipe_screen *screen = ctx->screen;
  91     struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
  92     struct pipe_texture *tex = transfer->texture;
  93     struct pipe_surface *src, *dst;
  94
  95     src = screen->get_tex_surface(screen, &r300transfer->detiled_texture->tex,
  96                                   0, 0, 0,
  97                                   PIPE_BUFFER_USAGE_GPU_READ |
  98                                   PIPE_BUFFER_USAGE_PIXEL);
  99
 100     dst = screen->get_tex_surface(screen, tex, r300transfer->face,
 101                                   r300transfer->level, r300transfer->zslice,
 102                                   PIPE_BUFFER_USAGE_GPU_WRITE |
 103                                   PIPE_BUFFER_USAGE_PIXEL);
 104
 105     /* XXX this flush prevents the following DRM error from occuring:
 106      * [drm:radeon_cs_ioctl] *ERROR* Failed to parse relocation !
 107      * Reproducible with perf/copytex. */
 108     ctx->flush(ctx, 0, NULL);
 109
 110     ctx->surface_copy(ctx, dst, r300transfer->x, r300transfer->y, src, 0, 0,
 111                       transfer->width, transfer->height);
 112
 113     /* XXX this flush fixes a few piglit tests (e.g. glean/pixelFormats). */
 114     ctx->flush(ctx, 0, NULL);
 115
 116     pipe_surface_reference(&src, NULL);
 117     pipe_surface_reference(&dst, NULL);
 118 }
 119
 120 static struct pipe_transfer*
 121 r300_get_tex_transfer(struct pipe_context *ctx,
 122                       struct pipe_texture *texture,
 123                       unsigned face, unsigned level, unsigned zslice,
 124                       enum pipe_transfer_usage usage, unsigned x, unsigned y,
 125                       unsigned w, unsigned h)
 126 {
 127     struct r300_texture *tex = (struct r300_texture *)texture;
 128     struct r300_screen *r300screen = r300_screen(ctx->screen);
 129     struct r300_transfer *trans;
 130     struct pipe_texture template;
 131
 132     trans = CALLOC_STRUCT(r300_transfer);
 133     if (trans) {
 134         /* Initialize the transfer object. */
 135         pipe_texture_reference(&trans->transfer.texture, texture);
 136         trans->transfer.usage = usage;
 137         trans->transfer.width = w;
 138         trans->transfer.height = h;
 139         trans->ctx = ctx;
 140         trans->x = x;
 141         trans->y = y;
 142         trans->level = level;
 143         trans->zslice = zslice;
 144         trans->face = face;
 145
 146         /* If the texture is tiled, we must create a temporary detiled texture
 147          * for this transfer. */
 148         if (tex->microtile || tex->macrotile) {
 149             trans->buffer_usage = pipe_transfer_buffer_flags(&trans->transfer);
 150             trans->render_target_usage =
 151                 util_format_is_depth_or_stencil(texture->format) ?
 152                 PIPE_TEXTURE_USAGE_DEPTH_STENCIL :
 153                 PIPE_TEXTURE_USAGE_RENDER_TARGET;
 154
 155             template.target = PIPE_TEXTURE_2D;
 156             template.format = texture->format;
 157             template.width0 = w;
 158             template.height0 = h;
 159             template.depth0 = 0;
 160             template.last_level = 0;
 161             template.nr_samples = 0;
 162             template.tex_usage = PIPE_TEXTURE_USAGE_DYNAMIC |
 163                                  R300_TEXTURE_USAGE_TRANSFER;
 164
 165             /* For texture reading, the temporary (detiled) texture is used as
 166              * a render target when blitting from a tiled texture. */
 167             if (usage & PIPE_TRANSFER_READ) {
 168                 template.tex_usage |= trans->render_target_usage;
 169             }
 170             /* For texture writing, the temporary texture is used as a sampler
 171              * when blitting into a tiled texture. */
 172             if (usage & PIPE_TRANSFER_WRITE) {
 173                 template.tex_usage |= PIPE_TEXTURE_USAGE_SAMPLER;
 174             }
 175
 176             /* Create the temporary texture. */
 177             trans->detiled_texture = (struct r300_texture*)
 178                ctx->screen->texture_create(ctx->screen,
 179                                            &template);
 180
 181             assert(!trans->detiled_texture->microtile &&
 182                    !trans->detiled_texture->macrotile);
 183
 184             /* Set the stride.
 185              * Parameters x, y, level, zslice, and face remain zero. */
 186             trans->transfer.stride =
 187                 r300_texture_get_stride(r300screen, trans->detiled_texture, 0);
 188
 189             if (usage & PIPE_TRANSFER_READ) {
 190                 /* We cannot map a tiled texture directly because the data is
 191                  * in a different order, therefore we do detiling using a blit. */
 192                 r300_copy_from_tiled_texture(ctx, trans);
 193             }
 194         } else {
 195             trans->transfer.x = x;
 196             trans->transfer.y = y;
 197             trans->transfer.stride =
 198                 r300_texture_get_stride(r300screen, tex, level);
 199             trans->transfer.level = level;
 200             trans->transfer.zslice = zslice;
 201             trans->transfer.face = face;
 202             trans->offset = r300_texture_get_offset(tex, level, zslice, face);
 203         }
 204     }
 205     return &trans->transfer;
 206 }
 207
 208 static void r300_tex_transfer_destroy(struct pipe_context *ctx,
 209                                       struct pipe_transfer *trans)
 210 {
 211     struct r300_transfer *r300transfer = r300_transfer(trans);
 212
 213     if (r300transfer->detiled_texture) {
 214         if (trans->usage & PIPE_TRANSFER_WRITE) {
 215             r300_copy_into_tiled_texture(r300transfer->ctx, r300transfer);
 216         }
 217
 218         pipe_texture_reference(
 219             (struct pipe_texture**)&r300transfer->detiled_texture, NULL);
 220     }
 221     pipe_texture_reference(&trans->texture, NULL);
 222     FREE(trans);
 223 }
 224
 225 static void* r300_transfer_map(struct pipe_context *ctx,
 226                                struct pipe_transfer *transfer)
 227 {
 228     struct r300_transfer *r300transfer = r300_transfer(transfer);
 229     struct r300_texture *tex = (struct r300_texture*)transfer->texture;
 230     char *map;
 231     enum pipe_format format = tex->tex.format;
 232
 233     if (r300transfer->detiled_texture) {
 234         /* The detiled texture is of the same size as the region being mapped
 235          * (no offset needed). */
 236         return pipe_buffer_map(ctx->screen,
 237                                r300transfer->detiled_texture->buffer,
 238                                pipe_transfer_buffer_flags(transfer));
 239     } else {
 240         /* Tiling is disabled. */
 241         map = pipe_buffer_map(ctx->screen, tex->buffer,
 242                               pipe_transfer_buffer_flags(transfer));
 243
 244         if (!map) {
 245             return NULL;
 246         }
 247
 248         return map + r300_transfer(transfer)->offset +
 249             transfer->y / util_format_get_blockheight(format) * transfer->stride +
 250             transfer->x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 251     }
 252 }
 253
 254 static void r300_transfer_unmap(struct pipe_context *ctx,
 255                                 struct pipe_transfer *transfer)
 256 {
 257     struct r300_transfer *r300transfer = r300_transfer(transfer);
 258     struct r300_texture *tex = (struct r300_texture*)transfer->texture;
 259
 260     if (r300transfer->detiled_texture) {
 261         pipe_buffer_unmap(ctx->screen, r300transfer->detiled_texture->buffer);
 262     } else {
 263         pipe_buffer_unmap(ctx->screen, tex->buffer);
 264     }
 265 }
 266
 267
 268 void r300_init_transfer_functions( struct r300_context *r300ctx )
 269 {
 270    struct pipe_context *ctx = &r300ctx->context;
 271
 272    ctx->get_tex_transfer = r300_get_tex_transfer;
 273    ctx->tex_transfer_destroy = r300_tex_transfer_destroy;
 274    ctx->transfer_map = r300_transfer_map;
 275    ctx->transfer_unmap = r300_transfer_unmap;
 276 }