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_resource *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->b.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->b.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_resource *tex = r300_resource(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_buf, 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_buf, 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->tex.microtile || tex->tex.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             base.depth0 = 1;
 124             base.array_size = 1;
 125             base.last_level = 0;
 126             base.nr_samples = 0;
 127             base.usage = PIPE_USAGE_DYNAMIC;
 128             base.bind = 0;
 129             base.flags = R300_RESOURCE_FLAG_TRANSFER;
 130
 131             /* For texture reading, the temporary (detiled) texture is used as
 132              * a render target when blitting from a tiled texture. */
 133             if (usage & PIPE_TRANSFER_READ) {
 134                 base.bind |= PIPE_BIND_RENDER_TARGET;
 135             }
 136             /* For texture writing, the temporary texture is used as a sampler
 137              * when blitting into a tiled texture. */
 138             if (usage & PIPE_TRANSFER_WRITE) {
 139                 base.bind |= PIPE_BIND_SAMPLER_VIEW;
 140             }
 141
 142             /* Create the temporary texture. */
 143             trans->linear_texture = r300_resource(
 144                ctx->screen->resource_create(ctx->screen,
 145                                             &base));
 146
 147             if (!trans->linear_texture) {
 148                 /* Oh crap, the thing can't create the texture.
 149                  * Let's flush and try again. */
 150                 ctx->flush(ctx, 0, NULL);
 151
 152                 trans->linear_texture = r300_resource(
 153                    ctx->screen->resource_create(ctx->screen,
 154                                                 &base));
 155
 156                 if (!trans->linear_texture) {
 157                     /* For linear textures, it's safe to fallback to
 158                      * an unpipelined transfer. */
 159                     if (!tex->tex.microtile && !tex->tex.macrotile[level]) {
 160                         goto unpipelined;
 161                     }
 162
 163                     /* Otherwise, go to hell. */
 164                     fprintf(stderr,
 165                         "r300: Failed to create a transfer object, praise.\n");
 166                     FREE(trans);
 167                     return NULL;
 168                 }
 169             }
 170
 171             assert(!trans->linear_texture->tex.microtile &&
 172                    !trans->linear_texture->tex.macrotile[0]);
 173
 174             /* Set the stride.
 175              *
 176              * Even though we are using an internal texture for this,
 177              * the transfer level, box and usage parameters still reflect
 178              * the arguments received to get_transfer.  We just do the
 179              * right thing internally.
 180              */
 181             trans->transfer.stride =
 182                     trans->linear_texture->tex.stride_in_bytes[0];
 183
 184             if (usage & PIPE_TRANSFER_READ) {
 185                 /* We cannot map a tiled texture directly because the data is
 186                  * in a different order, therefore we do detiling using a blit. */
 187                 r300_copy_from_tiled_texture(ctx, trans);
 188
 189                 /* Always referenced in the blit. */
 190                 ctx->flush(ctx, 0, NULL);
 191             }
 192             return &trans->transfer;
 193         }
 194
 195     unpipelined:
 196         /* Unpipelined transfer. */
 197         trans->transfer.stride = tex->tex.stride_in_bytes[level];
 198         trans->offset = r300_texture_get_offset(tex, level, box->z);
 199
 200         if (referenced_cs)
 201             ctx->flush(ctx, PIPE_FLUSH_RENDER_CACHE, NULL);
 202         return &trans->transfer;
 203     }
 204     return NULL;
 205 }
 206
 207 void r300_texture_transfer_destroy(struct pipe_context *ctx,
 208                                    struct pipe_transfer *trans)
 209 {
 210     struct r300_transfer *r300transfer = r300_transfer(trans);
 211
 212     if (r300transfer->linear_texture) {
 213         if (trans->usage & PIPE_TRANSFER_WRITE) {
 214             r300_copy_into_tiled_texture(ctx, r300transfer);
 215         }
 216
 217         pipe_resource_reference(
 218             (struct pipe_resource**)&r300transfer->linear_texture, NULL);
 219     }
 220     pipe_resource_reference(&trans->resource, NULL);
 221     FREE(trans);
 222 }
 223
 224 void* r300_texture_transfer_map(struct pipe_context *ctx,
 225                                 struct pipe_transfer *transfer)
 226 {
 227     struct r300_context *r300 = r300_context(ctx);
 228     struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
 229     struct r300_transfer *r300transfer = r300_transfer(transfer);
 230     struct r300_resource *tex = r300_resource(transfer->resource);
 231     char *map;
 232     enum pipe_format format = tex->b.b.b.format;
 233
 234     if (r300transfer->linear_texture) {
 235         /* The detiled texture is of the same size as the region being mapped
 236          * (no offset needed). */
 237         return rws->buffer_map(rws,
 238                                r300transfer->linear_texture->buf,
 239                                r300->cs,
 240                                transfer->usage);
 241     } else {
 242         /* Tiling is disabled. */
 243         map = rws->buffer_map(rws, tex->buf, r300->cs,
 244                               transfer->usage);
 245
 246         if (!map) {
 247             return NULL;
 248         }
 249
 250         return map + r300_transfer(transfer)->offset +
 251             transfer->box.y / util_format_get_blockheight(format) * transfer->stride +
 252             transfer->box.x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 253     }
 254 }
 255
 256 void r300_texture_transfer_unmap(struct pipe_context *ctx,
 257                                  struct pipe_transfer *transfer)
 258 {
 259     struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
 260     struct r300_transfer *r300transfer = r300_transfer(transfer);
 261     struct r300_resource *tex = r300_resource(transfer->resource);
 262
 263     if (r300transfer->linear_texture) {
 264         rws->buffer_unmap(rws, r300transfer->linear_texture->buf);
 265     } else {
 266         rws->buffer_unmap(rws, tex->buf);
 267     }
 268 }