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, 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, 0, &src_box);
  74
  75     /* XXX remove this. */
  76     r300_flush(ctx, 0, NULL);
  77 }
  78
  79 struct pipe_transfer*
  80 r300_texture_get_transfer(struct pipe_context *ctx,
  81                           struct pipe_resource *texture,
  82                           unsigned level,
  83                           unsigned usage,
  84                           const struct pipe_box *box)
  85 {
  86     struct r300_context *r300 = r300_context(ctx);
  87     struct r300_resource *tex = r300_resource(texture);
  88     struct r300_transfer *trans;
  89     struct pipe_resource base;
  90     boolean referenced_cs, referenced_hw;
  91
  92     referenced_cs =
  93         r300->rws->cs_is_buffer_referenced(r300->cs, tex->cs_buf, RADEON_USAGE_READWRITE);
  94     if (referenced_cs) {
  95         referenced_hw = TRUE;
  96     } else {
  97         referenced_hw =
  98             r300->rws->buffer_is_busy(tex->buf, RADEON_USAGE_READWRITE);
  99     }
 100
 101     trans = CALLOC_STRUCT(r300_transfer);
 102     if (trans) {
 103         /* Initialize the transfer object. */
 104         pipe_resource_reference(&trans->transfer.resource, texture);
 105         trans->transfer.level = level;
 106         trans->transfer.usage = usage;
 107         trans->transfer.box = *box;
 108
 109         /* If the texture is tiled, we must create a temporary detiled texture
 110          * for this transfer.
 111          * Also make write transfers pipelined. */
 112         if (tex->tex.microtile || tex->tex.macrotile[level] ||
 113             (referenced_hw && !(usage & PIPE_TRANSFER_READ) &&
 114              r300_is_blit_supported(texture->format))) {
 115             if (r300->blitter->running) {
 116                 fprintf(stderr, "r300: ERROR: Blitter recursion in texture_get_transfer.\n");
 117                 os_break();
 118             }
 119
 120             base.target = PIPE_TEXTURE_2D;
 121             base.format = texture->format;
 122             base.width0 = box->width;
 123             base.height0 = box->height;
 124             base.depth0 = 1;
 125             base.array_size = 1;
 126             base.last_level = 0;
 127             base.nr_samples = 0;
 128             base.usage = PIPE_USAGE_STAGING;
 129             base.bind = 0;
 130             if (usage & PIPE_TRANSFER_READ) {
 131                 base.bind |= PIPE_BIND_SAMPLER_VIEW;
 132             }
 133             if (usage & PIPE_TRANSFER_WRITE) {
 134                 base.bind |= PIPE_BIND_RENDER_TARGET;
 135             }
 136             base.flags = R300_RESOURCE_FLAG_TRANSFER;
 137
 138             /* For texture reading, the temporary (detiled) texture is used as
 139              * a render target when blitting from a tiled texture. */
 140             if (usage & PIPE_TRANSFER_READ) {
 141                 base.bind |= PIPE_BIND_RENDER_TARGET;
 142             }
 143             /* For texture writing, the temporary texture is used as a sampler
 144              * when blitting into a tiled texture. */
 145             if (usage & PIPE_TRANSFER_WRITE) {
 146                 base.bind |= PIPE_BIND_SAMPLER_VIEW;
 147             }
 148
 149             /* Create the temporary texture. */
 150             trans->linear_texture = r300_resource(
 151                ctx->screen->resource_create(ctx->screen,
 152                                             &base));
 153
 154             if (!trans->linear_texture) {
 155                 /* Oh crap, the thing can't create the texture.
 156                  * Let's flush and try again. */
 157                 r300_flush(ctx, 0, NULL);
 158
 159                 trans->linear_texture = r300_resource(
 160                    ctx->screen->resource_create(ctx->screen,
 161                                                 &base));
 162
 163                 if (!trans->linear_texture) {
 164                     /* For linear textures, it's safe to fallback to
 165                      * an unpipelined transfer. */
 166                     if (!tex->tex.microtile && !tex->tex.macrotile[level]) {
 167                         goto unpipelined;
 168                     }
 169
 170                     /* Otherwise, go to hell. */
 171                     fprintf(stderr,
 172                         "r300: Failed to create a transfer object, praise.\n");
 173                     FREE(trans);
 174                     return NULL;
 175                 }
 176             }
 177
 178             assert(!trans->linear_texture->tex.microtile &&
 179                    !trans->linear_texture->tex.macrotile[0]);
 180
 181             /* Set the stride. */
 182             trans->transfer.stride =
 183                     trans->linear_texture->tex.stride_in_bytes[0];
 184
 185             if (usage & PIPE_TRANSFER_READ) {
 186                 /* We cannot map a tiled texture directly because the data is
 187                  * in a different order, therefore we do detiling using a blit. */
 188                 r300_copy_from_tiled_texture(ctx, trans);
 189
 190                 /* Always referenced in the blit. */
 191                 r300_flush(ctx, 0, NULL);
 192             }
 193             return &trans->transfer;
 194         }
 195
 196     unpipelined:
 197         /* Unpipelined transfer. */
 198         trans->transfer.stride = tex->tex.stride_in_bytes[level];
 199         trans->offset = r300_texture_get_offset(tex, level, box->z);
 200
 201         if (referenced_cs &&
 202             !(usage & PIPE_TRANSFER_UNSYNCHRONIZED))
 203             r300_flush(ctx, 0, NULL);
 204         return &trans->transfer;
 205     }
 206     return NULL;
 207 }
 208
 209 void r300_texture_transfer_destroy(struct pipe_context *ctx,
 210                                    struct pipe_transfer *trans)
 211 {
 212     struct r300_transfer *r300transfer = r300_transfer(trans);
 213
 214     if (r300transfer->linear_texture) {
 215         if (trans->usage & PIPE_TRANSFER_WRITE) {
 216             r300_copy_into_tiled_texture(ctx, r300transfer);
 217         }
 218
 219         pipe_resource_reference(
 220             (struct pipe_resource**)&r300transfer->linear_texture, NULL);
 221     }
 222     pipe_resource_reference(&trans->resource, NULL);
 223     FREE(trans);
 224 }
 225
 226 void* r300_texture_transfer_map(struct pipe_context *ctx,
 227                                 struct pipe_transfer *transfer)
 228 {
 229     struct r300_context *r300 = r300_context(ctx);
 230     struct r300_transfer *r300transfer = r300_transfer(transfer);
 231     struct r300_resource *tex = r300_resource(transfer->resource);
 232     char *map;
 233     enum pipe_format format = tex->b.b.format;
 234
 235     if (r300transfer->linear_texture) {
 236         /* The detiled texture is of the same size as the region being mapped
 237          * (no offset needed). */
 238         return r300->rws->buffer_map(r300transfer->linear_texture->cs_buf,
 239                                      r300->cs, transfer->usage);
 240     } else {
 241         /* Tiling is disabled. */
 242         map = r300->rws->buffer_map(tex->cs_buf, r300->cs, transfer->usage);
 243
 244         if (!map) {
 245             return NULL;
 246         }
 247
 248         return map + r300_transfer(transfer)->offset +
 249             transfer->box.y / util_format_get_blockheight(format) * transfer->stride +
 250             transfer->box.x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 251     }
 252 }
 253
 254 void r300_texture_transfer_unmap(struct pipe_context *ctx,
 255                                  struct pipe_transfer *transfer)
 256 {
 257     struct radeon_winsys *rws = r300_context(ctx)->rws;
 258     struct r300_transfer *r300transfer = r300_transfer(transfer);
 259     struct r300_resource *tex = r300_resource(transfer->resource);
 260
 261     if (r300transfer->linear_texture) {
 262         rws->buffer_unmap(r300transfer->linear_texture->cs_buf);
 263     } else {
 264         rws->buffer_unmap(tex->cs_buf);
 265     }
 266 }