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/format/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 *src = transfer->resource;
  56     struct pipe_resource *dst = &r300transfer->linear_texture->b.b;
  57
  58     if (src->nr_samples <= 1) {
  59         ctx->resource_copy_region(ctx, dst, 0, 0, 0, 0,
  60                                   src, transfer->level, &transfer->box);
  61     } else {
  62         /* Resolve the resource. */
  63         struct pipe_blit_info blit;
  64
  65         memset(&blit, 0, sizeof(blit));
  66         blit.src.resource = src;
  67         blit.src.format = src->format;
  68         blit.src.level = transfer->level;
  69         blit.src.box = transfer->box;
  70         blit.dst.resource = dst;
  71         blit.dst.format = dst->format;
  72         blit.dst.box.width = transfer->box.width;
  73         blit.dst.box.height = transfer->box.height;
  74         blit.dst.box.depth = transfer->box.depth;
  75         blit.mask = PIPE_MASK_RGBA;
  76         blit.filter = PIPE_TEX_FILTER_NEAREST;
  77
  78         ctx->blit(ctx, &blit);
  79     }
  80 }
  81
  82 /* Copy a detiled texture to a tiled one. */
  83 static void r300_copy_into_tiled_texture(struct pipe_context *ctx,
  84                                          struct r300_transfer *r300transfer)
  85 {
  86     struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
  87     struct pipe_resource *tex = transfer->resource;
  88     struct pipe_box src_box;
  89
  90     u_box_3d(0, 0, 0,
  91              transfer->box.width, transfer->box.height, transfer->box.depth,
  92              &src_box);
  93
  94     ctx->resource_copy_region(ctx, tex, transfer->level,
  95                               transfer->box.x, transfer->box.y, transfer->box.z,
  96                               &r300transfer->linear_texture->b.b, 0, &src_box);
  97
  98     /* XXX remove this. */
  99     r300_flush(ctx, 0, NULL);
 100 }
 101
 102 void *
 103 r300_texture_transfer_map(struct pipe_context *ctx,
 104                           struct pipe_resource *texture,
 105                           unsigned level,
 106                           unsigned usage,
 107                           const struct pipe_box *box,
 108                           struct pipe_transfer **transfer)
 109 {
 110     struct r300_context *r300 = r300_context(ctx);
 111     struct r300_resource *tex = r300_resource(texture);
 112     struct r300_transfer *trans;
 113     boolean referenced_cs, referenced_hw;
 114     enum pipe_format format = tex->b.b.format;
 115     char *map;
 116
 117     referenced_cs =
 118         r300->rws->cs_is_buffer_referenced(r300->cs, tex->buf, RADEON_USAGE_READWRITE);
 119     if (referenced_cs) {
 120         referenced_hw = TRUE;
 121     } else {
 122         referenced_hw =
 123             !r300->rws->buffer_wait(tex->buf, 0, RADEON_USAGE_READWRITE);
 124     }
 125
 126     trans = CALLOC_STRUCT(r300_transfer);
 127     if (trans) {
 128         /* Initialize the transfer object. */
 129         trans->transfer.resource = texture;
 130         trans->transfer.level = level;
 131         trans->transfer.usage = usage;
 132         trans->transfer.box = *box;
 133
 134         /* If the texture is tiled, we must create a temporary detiled texture
 135          * for this transfer.
 136          * Also make write transfers pipelined. */
 137         if (tex->tex.microtile || tex->tex.macrotile[level] ||
 138             (referenced_hw && !(usage & PIPE_TRANSFER_READ) &&
 139              r300_is_blit_supported(texture->format))) {
 140             struct pipe_resource base;
 141
 142             if (r300->blitter->running) {
 143                 fprintf(stderr, "r300: ERROR: Blitter recursion in texture_get_transfer.\n");
 144                 os_break();
 145             }
 146
 147             memset(&base, 0, sizeof(base));
 148             base.target = PIPE_TEXTURE_2D;
 149             base.format = texture->format;
 150             base.width0 = box->width;
 151             base.height0 = box->height;
 152             base.depth0 = 1;
 153             base.array_size = 1;
 154             base.usage = PIPE_USAGE_STAGING;
 155             base.flags = R300_RESOURCE_FLAG_TRANSFER;
 156
 157             /* We must set the correct texture target and dimensions if needed for a 3D transfer. */
 158             if (box->depth > 1 && util_max_layer(texture, level) > 0) {
 159                 base.target = texture->target;
 160
 161                 if (base.target == PIPE_TEXTURE_3D) {
 162                     base.depth0 = util_next_power_of_two(box->depth);
 163                 }
 164             }
 165
 166             /* Create the temporary texture. */
 167             trans->linear_texture = r300_resource(
 168                ctx->screen->resource_create(ctx->screen,
 169                                             &base));
 170
 171             if (!trans->linear_texture) {
 172                 /* Oh crap, the thing can't create the texture.
 173                  * Let's flush and try again. */
 174                 r300_flush(ctx, 0, NULL);
 175
 176                 trans->linear_texture = r300_resource(
 177                    ctx->screen->resource_create(ctx->screen,
 178                                                 &base));
 179
 180                 if (!trans->linear_texture) {
 181                     fprintf(stderr,
 182                             "r300: Failed to create a transfer object.\n");
 183                     FREE(trans);
 184                     return NULL;
 185                 }
 186             }
 187
 188             assert(!trans->linear_texture->tex.microtile &&
 189                    !trans->linear_texture->tex.macrotile[0]);
 190
 191             /* Set the stride. */
 192             trans->transfer.stride =
 193                     trans->linear_texture->tex.stride_in_bytes[0];
 194             trans->transfer.layer_stride =
 195                     trans->linear_texture->tex.layer_size_in_bytes[0];
 196
 197             if (usage & PIPE_TRANSFER_READ) {
 198                 /* We cannot map a tiled texture directly because the data is
 199                  * in a different order, therefore we do detiling using a blit. */
 200                 r300_copy_from_tiled_texture(ctx, trans);
 201
 202                 /* Always referenced in the blit. */
 203                 r300_flush(ctx, 0, NULL);
 204             }
 205         } else {
 206             /* Unpipelined transfer. */
 207             trans->transfer.stride = tex->tex.stride_in_bytes[level];
 208             trans->transfer.layer_stride = tex->tex.layer_size_in_bytes[level];
 209             trans->offset = r300_texture_get_offset(tex, level, box->z);
 210
 211             if (referenced_cs &&
 212                 !(usage & PIPE_TRANSFER_UNSYNCHRONIZED)) {
 213                 r300_flush(ctx, 0, NULL);
 214             }
 215         }
 216     }
 217
 218     if (trans->linear_texture) {
 219         /* The detiled texture is of the same size as the region being mapped
 220          * (no offset needed). */
 221         map = r300->rws->buffer_map(trans->linear_texture->buf,
 222                                     r300->cs, usage);
 223         if (!map) {
 224             pipe_resource_reference(
 225                 (struct pipe_resource**)&trans->linear_texture, NULL);
 226             FREE(trans);
 227             return NULL;
 228         }
 229         *transfer = &trans->transfer;
 230         return map;
 231     } else {
 232         /* Tiling is disabled. */
 233         map = r300->rws->buffer_map(tex->buf, r300->cs, usage);
 234         if (!map) {
 235             FREE(trans);
 236             return NULL;
 237         }
 238
 239         *transfer = &trans->transfer;
 240         return map + trans->offset +
 241             box->y / util_format_get_blockheight(format) * trans->transfer.stride +
 242             box->x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 243     }
 244 }
 245
 246 void r300_texture_transfer_unmap(struct pipe_context *ctx,
 247                                  struct pipe_transfer *transfer)
 248 {
 249     struct r300_transfer *trans = r300_transfer(transfer);
 250
 251     if (trans->linear_texture) {
 252         if (transfer->usage & PIPE_TRANSFER_WRITE) {
 253             r300_copy_into_tiled_texture(ctx, trans);
 254         }
 255
 256         pipe_resource_reference(
 257             (struct pipe_resource**)&trans->linear_texture, NULL);
 258     }
 259     FREE(transfer);
 260 }