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     ctx->resource_copy_region(ctx, &r300transfer->detiled_texture->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->detiled_texture->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_texture *tex = r300_texture(texture);
  95     struct r300_screen *r300screen = r300_screen(ctx->screen);
  96     struct r300_transfer *trans;
  97     struct pipe_resource base;
  98     boolean referenced_cs, referenced_hw, blittable;
  99
 100     referenced_cs = r300screen->rws->is_buffer_referenced(
 101                                 r300screen->rws, tex->buffer, R300_REF_CS);
 102     if (referenced_cs) {
 103         referenced_hw = TRUE;
 104     } else {
 105         referenced_hw = r300screen->rws->is_buffer_referenced(
 106                                 r300screen->rws, tex->buffer, R300_REF_HW);
 107     }
 108
 109     blittable = ctx->screen->is_format_supported(
 110             ctx->screen, texture->format, texture->target, 0,
 111             PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET, 0);
 112
 113     trans = CALLOC_STRUCT(r300_transfer);
 114     if (trans) {
 115         /* Initialize the transfer object. */
 116         pipe_resource_reference(&trans->transfer.resource, texture);
 117         trans->transfer.sr = sr;
 118         trans->transfer.usage = usage;
 119         trans->transfer.box = *box;
 120
 121         /* If the texture is tiled, we must create a temporary detiled texture
 122          * for this transfer.
 123          * Also make write transfers pipelined. */
 124         if (tex->microtile || tex->macrotile ||
 125             ((referenced_hw & !(usage & PIPE_TRANSFER_READ)) && blittable)) {
 126             base.target = PIPE_TEXTURE_2D;
 127             base.format = texture->format;
 128             base.width0 = box->width;
 129             base.height0 = box->height;
 130             base.depth0 = 0;
 131             base.last_level = 0;
 132             base.nr_samples = 0;
 133             base.usage = PIPE_USAGE_DYNAMIC;
 134             base.bind = 0;
 135             base.flags = R300_RESOURCE_FLAG_TRANSFER;
 136
 137             /* For texture reading, the temporary (detiled) texture is used as
 138              * a render target when blitting from a tiled texture. */
 139             if (usage & PIPE_TRANSFER_READ) {
 140                 base.bind |= PIPE_BIND_RENDER_TARGET;
 141             }
 142             /* For texture writing, the temporary texture is used as a sampler
 143              * when blitting into a tiled texture. */
 144             if (usage & PIPE_TRANSFER_WRITE) {
 145                 base.bind |= PIPE_BIND_SAMPLER_VIEW;
 146             }
 147
 148             /* Create the temporary texture. */
 149             trans->detiled_texture = r300_texture(
 150                ctx->screen->resource_create(ctx->screen,
 151                                             &base));
 152
 153             if (!trans->detiled_texture) {
 154                 /* Oh crap, the thing can't create the texture.
 155                  * Let's flush and try again. */
 156                 ctx->flush(ctx, 0, NULL);
 157
 158                 trans->detiled_texture = r300_texture(
 159                    ctx->screen->resource_create(ctx->screen,
 160                                                 &base));
 161
 162                 if (!trans->detiled_texture) {
 163                     /* For linear textures, it's safe to fallback to
 164                      * an unpipelined transfer. */
 165                     if (!tex->microtile && !tex->macrotile) {
 166                         goto unpipelined;
 167                     }
 168
 169                     /* Otherwise, go to hell. */
 170                     fprintf(stderr,
 171                         "r300: Failed to create a transfer object, praise.\n");
 172                     FREE(trans);
 173                     return NULL;
 174                 }
 175             }
 176
 177             assert(!trans->detiled_texture->microtile &&
 178                    !trans->detiled_texture->macrotile);
 179
 180             /* Set the stride.
 181              *
 182              * Even though we are using an internal texture for this,
 183              * the transfer sr, box and usage parameters still reflect
 184              * the arguments received to get_transfer.  We just do the
 185              * right thing internally.
 186              */
 187             trans->transfer.stride =
 188                 r300_texture_get_stride(r300screen, trans->detiled_texture, 0);
 189
 190             if (usage & PIPE_TRANSFER_READ) {
 191                 /* We cannot map a tiled texture directly because the data is
 192                  * in a different order, therefore we do detiling using a blit. */
 193                 r300_copy_from_tiled_texture(ctx, trans);
 194
 195                 /* Always referenced in the blit. */
 196                 ctx->flush(ctx, 0, NULL);
 197             }
 198             return &trans->transfer;
 199         }
 200
 201     unpipelined:
 202         /* Unpipelined transfer. */
 203         trans->transfer.stride =
 204                 r300_texture_get_stride(r300screen, tex, sr.level);
 205         trans->offset = r300_texture_get_offset(tex, sr.level, box->z, sr.face);
 206
 207         if (referenced_cs && (usage & PIPE_TRANSFER_READ))
 208             ctx->flush(ctx, PIPE_FLUSH_RENDER_CACHE, NULL);
 209         return &trans->transfer;
 210     }
 211     return NULL;
 212 }
 213
 214 void r300_texture_transfer_destroy(struct pipe_context *ctx,
 215                                    struct pipe_transfer *trans)
 216 {
 217     struct r300_transfer *r300transfer = r300_transfer(trans);
 218
 219     if (r300transfer->detiled_texture) {
 220         if (trans->usage & PIPE_TRANSFER_WRITE) {
 221             r300_copy_into_tiled_texture(ctx, r300transfer);
 222         }
 223
 224         pipe_resource_reference(
 225             (struct pipe_resource**)&r300transfer->detiled_texture, NULL);
 226     }
 227     pipe_resource_reference(&trans->resource, NULL);
 228     FREE(trans);
 229 }
 230
 231 void* r300_texture_transfer_map(struct pipe_context *ctx,
 232                                 struct pipe_transfer *transfer)
 233 {
 234     struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
 235     struct r300_transfer *r300transfer = r300_transfer(transfer);
 236     struct r300_texture *tex = r300_texture(transfer->resource);
 237     char *map;
 238     enum pipe_format format = tex->b.b.format;
 239
 240     if (r300transfer->detiled_texture) {
 241         /* The detiled texture is of the same size as the region being mapped
 242          * (no offset needed). */
 243         return rws->buffer_map(rws,
 244                                r300transfer->detiled_texture->buffer,
 245                                transfer->usage);
 246     } else {
 247         /* Tiling is disabled. */
 248         map = rws->buffer_map(rws, tex->buffer,
 249                               transfer->usage);
 250
 251         if (!map) {
 252             return NULL;
 253         }
 254
 255         return map + r300_transfer(transfer)->offset +
 256             transfer->box.y / util_format_get_blockheight(format) * transfer->stride +
 257             transfer->box.x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 258     }
 259 }
 260
 261 void r300_texture_transfer_unmap(struct pipe_context *ctx,
 262                                  struct pipe_transfer *transfer)
 263 {
 264     struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
 265     struct r300_transfer *r300transfer = r300_transfer(transfer);
 266     struct r300_texture *tex = r300_texture(transfer->resource);
 267
 268     if (r300transfer->detiled_texture) {
 269         rws->buffer_unmap(rws, r300transfer->detiled_texture->buffer);
 270     } else {
 271         rws->buffer_unmap(rws, tex->buffer);
 272     }
 273 }