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