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.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     /* Detiled texture. */
  39     struct r300_texture *detiled_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     /* XXX if we don't flush before copying the texture and mapping it,
  61      * we get wrong pixels, i.e. it's like latest draw calls didn't happen,
  62      * including this blit. Tests: e.g. piglit/provoking-vertex
  63      *
  64      * Since the flush immediately before mapping is implicit (the buffer is
  65      * always referenced in resource_copy_region), every read transfer costs
  66      * 2 flushes. That sucks. */
  67     ctx->flush(ctx, 0, NULL);
  68
  69     ctx->resource_copy_region(ctx, &r300transfer->detiled_texture->b.b, subdst,
  70                               0, 0, 0,
  71                               tex, transfer->sr,
  72                               transfer->box.x, transfer->box.y, transfer->box.z,
  73                               transfer->box.width, transfer->box.height);
  74
  75     /* Flushing after the copy is implicit, issued by winsys. */
  76 }
  77
  78 /* Copy a detiled texture to a tiled one. */
  79 static void r300_copy_into_tiled_texture(struct pipe_context *ctx,
  80                                          struct r300_transfer *r300transfer)
  81 {
  82     struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
  83     struct pipe_resource *tex = transfer->resource;
  84     struct pipe_subresource subsrc;
  85
  86     subsrc.face = 0;
  87     subsrc.level = 0;
  88
  89     ctx->resource_copy_region(ctx, tex, transfer->sr,
  90                               transfer->box.x, transfer->box.y, transfer->box.z,
  91                               &r300transfer->detiled_texture->b.b, subsrc,
  92                               0, 0, 0,
  93                               transfer->box.width, transfer->box.height);
  94
  95     /* XXX this flush fixes a few piglit tests (e.g. glean/pixelFormats). */
  96     ctx->flush(ctx, 0, NULL);
  97 }
  98
  99 struct pipe_transfer*
 100 r300_texture_get_transfer(struct pipe_context *ctx,
 101                           struct pipe_resource *texture,
 102                           struct pipe_subresource sr,
 103                           unsigned usage,
 104                           const struct pipe_box *box)
 105 {
 106     struct r300_texture *tex = r300_texture(texture);
 107     struct r300_screen *r300screen = r300_screen(ctx->screen);
 108     struct r300_transfer *trans;
 109     struct pipe_resource base;
 110     boolean referenced_cs, referenced_hw, blittable;
 111
 112     referenced_cs = r300screen->rws->is_buffer_referenced(
 113                                 r300screen->rws, tex->buffer, R300_REF_CS);
 114     if (referenced_cs) {
 115         referenced_hw = TRUE;
 116     } else {
 117         referenced_hw = r300screen->rws->is_buffer_referenced(
 118                                 r300screen->rws, tex->buffer, R300_REF_HW);
 119     }
 120
 121     blittable = ctx->screen->is_format_supported(
 122             ctx->screen, texture->format, texture->target, 0,
 123             PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET, 0);
 124
 125     trans = CALLOC_STRUCT(r300_transfer);
 126     if (trans) {
 127         /* Initialize the transfer object. */
 128         pipe_resource_reference(&trans->transfer.resource, texture);
 129         trans->transfer.sr = sr;
 130         trans->transfer.usage = usage;
 131         trans->transfer.box = *box;
 132
 133         /* If the texture is tiled, we must create a temporary detiled texture
 134          * for this transfer.
 135          * Also make write transfers pipelined. */
 136         if (tex->microtile || tex->macrotile ||
 137             ((referenced_hw & !(usage & PIPE_TRANSFER_READ)) && blittable)) {
 138             base.target = PIPE_TEXTURE_2D;
 139             base.format = texture->format;
 140             base.width0 = box->width;
 141             base.height0 = box->height;
 142             base.depth0 = 0;
 143             base.last_level = 0;
 144             base.nr_samples = 0;
 145             base.usage = PIPE_USAGE_DYNAMIC;
 146             base.bind = 0;
 147             base.flags = R300_RESOURCE_FLAG_TRANSFER;
 148
 149             /* For texture reading, the temporary (detiled) texture is used as
 150              * a render target when blitting from a tiled texture. */
 151             if (usage & PIPE_TRANSFER_READ) {
 152                 base.bind |= PIPE_BIND_RENDER_TARGET;
 153             }
 154             /* For texture writing, the temporary texture is used as a sampler
 155              * when blitting into a tiled texture. */
 156             if (usage & PIPE_TRANSFER_WRITE) {
 157                 base.bind |= PIPE_BIND_SAMPLER_VIEW;
 158             }
 159
 160             /* Create the temporary texture. */
 161             trans->detiled_texture = r300_texture(
 162                ctx->screen->resource_create(ctx->screen,
 163                                             &base));
 164
 165             if (!trans->detiled_texture) {
 166                 /* Oh crap, the thing can't create the texture.
 167                  * Let's flush and try again. */
 168                 ctx->flush(ctx, 0, NULL);
 169
 170                 trans->detiled_texture = r300_texture(
 171                    ctx->screen->resource_create(ctx->screen,
 172                                                 &base));
 173
 174                 if (!trans->detiled_texture) {
 175                     /* For linear textures, it's safe to fallback to
 176                      * an unpipelined transfer. */
 177                     if (!tex->microtile && !tex->macrotile) {
 178                         goto unpipelined;
 179                     }
 180
 181                     /* Otherwise, go to hell. */
 182                     fprintf(stderr,
 183                         "r300: Failed to create a transfer object, praise.\n");
 184                     FREE(trans);
 185                     return NULL;
 186                 }
 187             }
 188
 189             assert(!trans->detiled_texture->microtile &&
 190                    !trans->detiled_texture->macrotile);
 191
 192             /* Set the stride.
 193              *
 194              * Even though we are using an internal texture for this,
 195              * the transfer sr, box and usage parameters still reflect
 196              * the arguments received to get_transfer.  We just do the
 197              * right thing internally.
 198              */
 199             trans->transfer.stride =
 200                 r300_texture_get_stride(r300screen, trans->detiled_texture, 0);
 201
 202             if (usage & PIPE_TRANSFER_READ) {
 203                 /* We cannot map a tiled texture directly because the data is
 204                  * in a different order, therefore we do detiling using a blit. */
 205                 r300_copy_from_tiled_texture(ctx, trans);
 206
 207                 /* Always referenced in the blit. */
 208                 ctx->flush(ctx, 0, NULL);
 209             }
 210             return &trans->transfer;
 211         }
 212
 213     unpipelined:
 214         /* Unpipelined transfer. */
 215         trans->transfer.stride =
 216                 r300_texture_get_stride(r300screen, tex, sr.level);
 217         trans->offset = r300_texture_get_offset(tex, sr.level, box->z, sr.face);
 218
 219         if (referenced_cs && (usage & PIPE_TRANSFER_READ))
 220             ctx->flush(ctx, PIPE_FLUSH_RENDER_CACHE, NULL);
 221         return &trans->transfer;
 222     }
 223     return NULL;
 224 }
 225
 226 void r300_texture_transfer_destroy(struct pipe_context *ctx,
 227                                    struct pipe_transfer *trans)
 228 {
 229     struct r300_transfer *r300transfer = r300_transfer(trans);
 230
 231     if (r300transfer->detiled_texture) {
 232         if (trans->usage & PIPE_TRANSFER_WRITE) {
 233             r300_copy_into_tiled_texture(ctx, r300transfer);
 234         }
 235
 236         pipe_resource_reference(
 237             (struct pipe_resource**)&r300transfer->detiled_texture, NULL);
 238     }
 239     pipe_resource_reference(&trans->resource, NULL);
 240     FREE(trans);
 241 }
 242
 243 void* r300_texture_transfer_map(struct pipe_context *ctx,
 244                                 struct pipe_transfer *transfer)
 245 {
 246     struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
 247     struct r300_transfer *r300transfer = r300_transfer(transfer);
 248     struct r300_texture *tex = r300_texture(transfer->resource);
 249     char *map;
 250     enum pipe_format format = tex->b.b.format;
 251
 252     if (r300transfer->detiled_texture) {
 253         /* The detiled texture is of the same size as the region being mapped
 254          * (no offset needed). */
 255         return rws->buffer_map(rws,
 256                                r300transfer->detiled_texture->buffer,
 257                                transfer->usage);
 258     } else {
 259         /* Tiling is disabled. */
 260         map = rws->buffer_map(rws, tex->buffer,
 261                               transfer->usage);
 262
 263         if (!map) {
 264             return NULL;
 265         }
 266
 267         return map + r300_transfer(transfer)->offset +
 268             transfer->box.y / util_format_get_blockheight(format) * transfer->stride +
 269             transfer->box.x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 270     }
 271 }
 272
 273 void r300_texture_transfer_unmap(struct pipe_context *ctx,
 274                                  struct pipe_transfer *transfer)
 275 {
 276     struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
 277     struct r300_transfer *r300transfer = r300_transfer(transfer);
 278     struct r300_texture *tex = r300_texture(transfer->resource);
 279
 280     if (r300transfer->detiled_texture) {
 281         rws->buffer_unmap(rws, r300transfer->detiled_texture->buffer);
 282     } else {
 283         rws->buffer_unmap(rws, tex->buffer);
 284     }
 285 }