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
  31 struct r300_transfer {
  32     /* Parent class */
  33     struct pipe_transfer transfer;
  34
  35     /* Offset from start of buffer. */
  36     unsigned offset;
  37
  38     /* Linear texture. */
  39     struct r300_texture *linear_texture;
  40 };
  41
  42 /* Convenience cast wrapper. */
  43 static INLINE struct r300_transfer*
  44 r300_transfer(struct pipe_transfer* transfer)
  45 {
  46     return (struct r300_transfer*)transfer;
  47 }
  48
  49 /* Copy from a tiled texture to a detiled one. */
  50 static void r300_copy_from_tiled_texture(struct pipe_context *ctx,
  51                                          struct r300_transfer *r300transfer)
  52 {
  53     struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
  54     struct pipe_resource *tex = transfer->resource;
  55     struct pipe_subresource subdst;
  56
  57     subdst.face = 0;
  58     subdst.level = 0;
  59
  60     ctx->resource_copy_region(ctx, &r300transfer->linear_texture->desc.b.b, subdst,
  61                               0, 0, 0,
  62                               tex, transfer->sr,
  63                               transfer->box.x, transfer->box.y, transfer->box.z,
  64                               transfer->box.width, transfer->box.height);
  65 }
  66
  67 /* Copy a detiled texture to a tiled one. */
  68 static void r300_copy_into_tiled_texture(struct pipe_context *ctx,
  69                                          struct r300_transfer *r300transfer)
  70 {
  71     struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
  72     struct pipe_resource *tex = transfer->resource;
  73     struct pipe_subresource subsrc;
  74
  75     subsrc.face = 0;
  76     subsrc.level = 0;
  77
  78     ctx->resource_copy_region(ctx, tex, transfer->sr,
  79                               transfer->box.x, transfer->box.y, transfer->box.z,
  80                               &r300transfer->linear_texture->desc.b.b, subsrc,
  81                               0, 0, 0,
  82                               transfer->box.width, transfer->box.height);
  83
  84     ctx->flush(ctx, 0, NULL);
  85 }
  86
  87 struct pipe_transfer*
  88 r300_texture_get_transfer(struct pipe_context *ctx,
  89                           struct pipe_resource *texture,
  90                           struct pipe_subresource sr,
  91                           unsigned usage,
  92                           const struct pipe_box *box)
  93 {
  94     struct r300_context *r300 = r300_context(ctx);
  95     struct r300_texture *tex = r300_texture(texture);
  96     struct r300_transfer *trans;
  97     struct pipe_resource base;
  98     boolean referenced_cs, referenced_hw, blittable;
  99
 100     referenced_cs =
 101         r300->rws->cs_is_buffer_referenced(r300->cs,
 102                                            tex->buffer, R300_REF_CS);
 103     if (referenced_cs) {
 104         referenced_hw = TRUE;
 105     } else {
 106         referenced_hw =
 107             r300->rws->cs_is_buffer_referenced(r300->cs,
 108                                                tex->buffer, R300_REF_HW);
 109     }
 110
 111     blittable = ctx->screen->is_format_supported(
 112             ctx->screen, texture->format, texture->target, 0,
 113             PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET, 0);
 114
 115     trans = CALLOC_STRUCT(r300_transfer);
 116     if (trans) {
 117         /* Initialize the transfer object. */
 118         pipe_resource_reference(&trans->transfer.resource, texture);
 119         trans->transfer.sr = sr;
 120         trans->transfer.usage = usage;
 121         trans->transfer.box = *box;
 122
 123         /* If the texture is tiled, we must create a temporary detiled texture
 124          * for this transfer.
 125          * Also make write transfers pipelined. */
 126         if (tex->desc.microtile || tex->desc.macrotile[sr.level] ||
 127             ((referenced_hw & !(usage & PIPE_TRANSFER_READ)) && blittable)) {
 128             base.target = PIPE_TEXTURE_2D;
 129             base.format = texture->format;
 130             base.width0 = box->width;
 131             base.height0 = box->height;
 132             base.depth0 = 0;
 133             base.last_level = 0;
 134             base.nr_samples = 0;
 135             base.usage = PIPE_USAGE_DYNAMIC;
 136             base.bind = 0;
 137             base.flags = R300_RESOURCE_FLAG_TRANSFER;
 138
 139             /* For texture reading, the temporary (detiled) texture is used as
 140              * a render target when blitting from a tiled texture. */
 141             if (usage & PIPE_TRANSFER_READ) {
 142                 base.bind |= PIPE_BIND_RENDER_TARGET;
 143             }
 144             /* For texture writing, the temporary texture is used as a sampler
 145              * when blitting into a tiled texture. */
 146             if (usage & PIPE_TRANSFER_WRITE) {
 147                 base.bind |= PIPE_BIND_SAMPLER_VIEW;
 148             }
 149
 150             /* Create the temporary texture. */
 151             trans->linear_texture = r300_texture(
 152                ctx->screen->resource_create(ctx->screen,
 153                                             &base));
 154
 155             if (!trans->linear_texture) {
 156                 /* Oh crap, the thing can't create the texture.
 157                  * Let's flush and try again. */
 158                 ctx->flush(ctx, 0, NULL);
 159
 160                 trans->linear_texture = r300_texture(
 161                    ctx->screen->resource_create(ctx->screen,
 162                                                 &base));
 163
 164                 if (!trans->linear_texture) {
 165                     /* For linear textures, it's safe to fallback to
 166                      * an unpipelined transfer. */
 167                     if (!tex->desc.microtile && !tex->desc.macrotile[sr.level]) {
 168                         goto unpipelined;
 169                     }
 170
 171                     /* Otherwise, go to hell. */
 172                     fprintf(stderr,
 173                         "r300: Failed to create a transfer object, praise.\n");
 174                     FREE(trans);
 175                     return NULL;
 176                 }
 177             }
 178
 179             assert(!trans->linear_texture->desc.microtile &&
 180                    !trans->linear_texture->desc.macrotile[0]);
 181
 182             /* Set the stride.
 183              *
 184              * Even though we are using an internal texture for this,
 185              * the transfer sr, box and usage parameters still reflect
 186              * the arguments received to get_transfer.  We just do the
 187              * right thing internally.
 188              */
 189             trans->transfer.stride =
 190                     trans->linear_texture->desc.stride_in_bytes[0];
 191
 192             if (usage & PIPE_TRANSFER_READ) {
 193                 /* We cannot map a tiled texture directly because the data is
 194                  * in a different order, therefore we do detiling using a blit. */
 195                 r300_copy_from_tiled_texture(ctx, trans);
 196
 197                 /* Always referenced in the blit. */
 198                 ctx->flush(ctx, 0, NULL);
 199             }
 200             return &trans->transfer;
 201         }
 202
 203     unpipelined:
 204         /* Unpipelined transfer. */
 205         trans->transfer.stride = tex->desc.stride_in_bytes[sr.level];
 206         trans->offset = r300_texture_get_offset(&tex->desc,
 207                                                 sr.level, box->z, sr.face);
 208
 209         if (referenced_cs)
 210             ctx->flush(ctx, PIPE_FLUSH_RENDER_CACHE, NULL);
 211         return &trans->transfer;
 212     }
 213     return NULL;
 214 }
 215
 216 void r300_texture_transfer_destroy(struct pipe_context *ctx,
 217                                    struct pipe_transfer *trans)
 218 {
 219     struct r300_transfer *r300transfer = r300_transfer(trans);
 220
 221     if (r300transfer->linear_texture) {
 222         if (trans->usage & PIPE_TRANSFER_WRITE) {
 223             r300_copy_into_tiled_texture(ctx, r300transfer);
 224         }
 225
 226         pipe_resource_reference(
 227             (struct pipe_resource**)&r300transfer->linear_texture, NULL);
 228     }
 229     pipe_resource_reference(&trans->resource, NULL);
 230     FREE(trans);
 231 }
 232
 233 void* r300_texture_transfer_map(struct pipe_context *ctx,
 234                                 struct pipe_transfer *transfer)
 235 {
 236     struct r300_context *r300 = r300_context(ctx);
 237     struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
 238     struct r300_transfer *r300transfer = r300_transfer(transfer);
 239     struct r300_texture *tex = r300_texture(transfer->resource);
 240     char *map;
 241     enum pipe_format format = tex->desc.b.b.format;
 242
 243     if (r300transfer->linear_texture) {
 244         /* The detiled texture is of the same size as the region being mapped
 245          * (no offset needed). */
 246         return rws->buffer_map(rws,
 247                                r300transfer->linear_texture->buffer,
 248                                r300->cs,
 249                                transfer->usage);
 250     } else {
 251         /* Tiling is disabled. */
 252         map = rws->buffer_map(rws, tex->buffer, r300->cs,
 253                               transfer->usage);
 254
 255         if (!map) {
 256             return NULL;
 257         }
 258
 259         return map + r300_transfer(transfer)->offset +
 260             transfer->box.y / util_format_get_blockheight(format) * transfer->stride +
 261             transfer->box.x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 262     }
 263 }
 264
 265 void r300_texture_transfer_unmap(struct pipe_context *ctx,
 266                                  struct pipe_transfer *transfer)
 267 {
 268     struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
 269     struct r300_transfer *r300transfer = r300_transfer(transfer);
 270     struct r300_texture *tex = r300_texture(transfer->resource);
 271
 272     if (r300transfer->linear_texture) {
 273         rws->buffer_unmap(rws, r300transfer->linear_texture->buffer);
 274     } else {
 275         rws->buffer_unmap(rws, tex->buffer);
 276     }
 277 }