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_transfer.h"
  25 #include "r300_texture_desc.h"
  26 #include "r300_screen_buffer.h"
  27
  28 #include "util/u_memory.h"
  29 #include "util/u_format.h"
  30 #include "util/u_box.h"
  31
  32 struct r300_transfer {
  33     /* Parent class */
  34     struct pipe_transfer transfer;
  35
  36     /* Offset from start of buffer. */
  37     unsigned offset;
  38
  39     /* Linear texture. */
  40     struct r300_texture *linear_texture;
  41 };
  42
  43 /* Convenience cast wrapper. */
  44 static INLINE struct r300_transfer*
  45 r300_transfer(struct pipe_transfer* transfer)
  46 {
  47     return (struct r300_transfer*)transfer;
  48 }
  49
  50 /* Copy from a tiled texture to a detiled one. */
  51 static void r300_copy_from_tiled_texture(struct pipe_context *ctx,
  52                                          struct r300_transfer *r300transfer)
  53 {
  54     struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
  55     struct pipe_resource *tex = transfer->resource;
  56
  57     ctx->resource_copy_region(ctx, &r300transfer->linear_texture->desc.b.b, 0,
  58                               0, 0, 0,
  59                               tex, transfer->level, &transfer->box);
  60 }
  61
  62 /* Copy a detiled texture to a tiled one. */
  63 static void r300_copy_into_tiled_texture(struct pipe_context *ctx,
  64                                          struct r300_transfer *r300transfer)
  65 {
  66     struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
  67     struct pipe_resource *tex = transfer->resource;
  68     struct pipe_box src_box;
  69     u_box_origin_2d(transfer->box.width, transfer->box.height, &src_box);
  70
  71     ctx->resource_copy_region(ctx, tex, transfer->level,
  72                               transfer->box.x, transfer->box.y, transfer->box.z,
  73                               &r300transfer->linear_texture->desc.b.b, 0, &src_box);
  74
  75     ctx->flush(ctx, 0, NULL);
  76 }
  77
  78 struct pipe_transfer*
  79 r300_texture_get_transfer(struct pipe_context *ctx,
  80                           struct pipe_resource *texture,
  81                           unsigned level,
  82                           unsigned usage,
  83                           const struct pipe_box *box)
  84 {
  85     struct r300_context *r300 = r300_context(ctx);
  86     struct r300_texture *tex = r300_texture(texture);
  87     struct r300_transfer *trans;
  88     struct pipe_resource base;
  89     boolean referenced_cs, referenced_hw, blittable;
  90
  91     referenced_cs =
  92         r300->rws->cs_is_buffer_referenced(r300->cs,
  93                                            tex->cs_buffer, R300_REF_CS);
  94     if (referenced_cs) {
  95         referenced_hw = TRUE;
  96     } else {
  97         referenced_hw =
  98             r300->rws->cs_is_buffer_referenced(r300->cs,
  99                                                tex->cs_buffer, R300_REF_HW);
 100     }
 101
 102     blittable = ctx->screen->is_format_supported(
 103             ctx->screen, texture->format, texture->target, 0,
 104             PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET, 0);
 105
 106     trans = CALLOC_STRUCT(r300_transfer);
 107     if (trans) {
 108         /* Initialize the transfer object. */
 109         pipe_resource_reference(&trans->transfer.resource, texture);
 110         trans->transfer.level = level;
 111         trans->transfer.usage = usage;
 112         trans->transfer.box = *box;
 113
 114         /* If the texture is tiled, we must create a temporary detiled texture
 115          * for this transfer.
 116          * Also make write transfers pipelined. */
 117         if (tex->desc.microtile || tex->desc.macrotile[level] ||
 118             ((referenced_hw & !(usage & PIPE_TRANSFER_READ)) && blittable)) {
 119             base.target = PIPE_TEXTURE_2D;
 120             base.format = texture->format;
 121             base.width0 = box->width;
 122             base.height0 = box->height;
 123             /* XXX: was depth0 = 0 */
 124             base.depth0 = 1;
 125             base.array_size = 1;
 126             base.last_level = 0;
 127             base.nr_samples = 0;
 128             base.usage = PIPE_USAGE_DYNAMIC;
 129             base.bind = 0;
 130             base.flags = R300_RESOURCE_FLAG_TRANSFER;
 131
 132             /* For texture reading, the temporary (detiled) texture is used as
 133              * a render target when blitting from a tiled texture. */
 134             if (usage & PIPE_TRANSFER_READ) {
 135                 base.bind |= PIPE_BIND_RENDER_TARGET;
 136             }
 137             /* For texture writing, the temporary texture is used as a sampler
 138              * when blitting into a tiled texture. */
 139             if (usage & PIPE_TRANSFER_WRITE) {
 140                 base.bind |= PIPE_BIND_SAMPLER_VIEW;
 141             }
 142
 143             /* Create the temporary texture. */
 144             trans->linear_texture = r300_texture(
 145                ctx->screen->resource_create(ctx->screen,
 146                                             &base));
 147
 148             if (!trans->linear_texture) {
 149                 /* Oh crap, the thing can't create the texture.
 150                  * Let's flush and try again. */
 151                 ctx->flush(ctx, 0, NULL);
 152
 153                 trans->linear_texture = r300_texture(
 154                    ctx->screen->resource_create(ctx->screen,
 155                                                 &base));
 156
 157                 if (!trans->linear_texture) {
 158                     /* For linear textures, it's safe to fallback to
 159                      * an unpipelined transfer. */
 160                     if (!tex->desc.microtile && !tex->desc.macrotile[level]) {
 161                         goto unpipelined;
 162                     }
 163
 164                     /* Otherwise, go to hell. */
 165                     fprintf(stderr,
 166                         "r300: Failed to create a transfer object, praise.\n");
 167                     FREE(trans);
 168                     return NULL;
 169                 }
 170             }
 171
 172             assert(!trans->linear_texture->desc.microtile &&
 173                    !trans->linear_texture->desc.macrotile[0]);
 174
 175             /* Set the stride.
 176              *
 177              * Even though we are using an internal texture for this,
 178              * the transfer level, box and usage parameters still reflect
 179              * the arguments received to get_transfer.  We just do the
 180              * right thing internally.
 181              */
 182             trans->transfer.stride =
 183                     trans->linear_texture->desc.stride_in_bytes[0];
 184
 185             if (usage & PIPE_TRANSFER_READ) {
 186                 /* We cannot map a tiled texture directly because the data is
 187                  * in a different order, therefore we do detiling using a blit. */
 188                 r300_copy_from_tiled_texture(ctx, trans);
 189
 190                 /* Always referenced in the blit. */
 191                 ctx->flush(ctx, 0, NULL);
 192             }
 193             return &trans->transfer;
 194         }
 195
 196     unpipelined:
 197         /* Unpipelined transfer. */
 198         trans->transfer.stride = tex->desc.stride_in_bytes[level];
 199         trans->offset = r300_texture_get_offset(&tex->desc, level, box->z);
 200
 201         if (referenced_cs)
 202             ctx->flush(ctx, PIPE_FLUSH_RENDER_CACHE, NULL);
 203         return &trans->transfer;
 204     }
 205     return NULL;
 206 }
 207
 208 void r300_texture_transfer_destroy(struct pipe_context *ctx,
 209                                    struct pipe_transfer *trans)
 210 {
 211     struct r300_transfer *r300transfer = r300_transfer(trans);
 212
 213     if (r300transfer->linear_texture) {
 214         if (trans->usage & PIPE_TRANSFER_WRITE) {
 215             r300_copy_into_tiled_texture(ctx, r300transfer);
 216         }
 217
 218         pipe_resource_reference(
 219             (struct pipe_resource**)&r300transfer->linear_texture, NULL);
 220     }
 221     pipe_resource_reference(&trans->resource, NULL);
 222     FREE(trans);
 223 }
 224
 225 void* r300_texture_transfer_map(struct pipe_context *ctx,
 226                                 struct pipe_transfer *transfer)
 227 {
 228     struct r300_context *r300 = r300_context(ctx);
 229     struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
 230     struct r300_transfer *r300transfer = r300_transfer(transfer);
 231     struct r300_texture *tex = r300_texture(transfer->resource);
 232     char *map;
 233     enum pipe_format format = tex->desc.b.b.format;
 234
 235     if (r300transfer->linear_texture) {
 236         /* The detiled texture is of the same size as the region being mapped
 237          * (no offset needed). */
 238         return rws->buffer_map(rws,
 239                                r300transfer->linear_texture->buffer,
 240                                r300->cs,
 241                                transfer->usage);
 242     } else {
 243         /* Tiling is disabled. */
 244         map = rws->buffer_map(rws, tex->buffer, r300->cs,
 245                               transfer->usage);
 246
 247         if (!map) {
 248             return NULL;
 249         }
 250
 251         return map + r300_transfer(transfer)->offset +
 252             transfer->box.y / util_format_get_blockheight(format) * transfer->stride +
 253             transfer->box.x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 254     }
 255 }
 256
 257 void r300_texture_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 = r300_texture(transfer->resource);
 263
 264     if (r300transfer->linear_texture) {
 265         rws->buffer_unmap(rws, r300transfer->linear_texture->buffer);
 266     } else {
 267         rws->buffer_unmap(rws, tex->buffer);
 268     }
 269 }