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_context.h"
  25 #include "r300_transfer.h"
  26 #include "r300_texture.h"
  27 #include "r300_screen.h"
  28
  29 #include "r300_winsys.h"
  30
  31 #include "util/u_memory.h"
  32 #include "util/u_format.h"
  33
  34 struct r300_transfer {
  35     /* Parent class */
  36     struct pipe_transfer transfer;
  37
  38     /* Offset from start of buffer. */
  39     unsigned offset;
  40
  41     /* Detiled texture. */
  42     struct r300_texture *detiled_texture;
  43
  44     /* Transfer and format flags. */
  45     unsigned render_target_usage;
  46 };
  47
  48 /* Convenience cast wrapper. */
  49 static INLINE struct r300_transfer*
  50 r300_transfer(struct pipe_transfer* transfer)
  51 {
  52     return (struct r300_transfer*)transfer;
  53 }
  54
  55 /* Copy from a tiled texture to a detiled one. */
  56 static void r300_copy_from_tiled_texture(struct pipe_context *ctx,
  57                                          struct r300_transfer *r300transfer)
  58 {
  59     struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
  60     struct pipe_resource *tex = transfer->resource;
  61     struct pipe_subresource subdst;
  62
  63     subdst.face = 0;
  64     subdst.level = 0;
  65
  66     ctx->resource_copy_region(ctx, &r300transfer->detiled_texture->b.b, subdst,
  67                               0, 0, 0,
  68                               tex, transfer->sr,
  69                               transfer->box.x, transfer->box.y, transfer->box.z,
  70                               transfer->box.width, transfer->box.height);
  71 }
  72
  73 /* Copy a detiled texture to a tiled one. */
  74 static void r300_copy_into_tiled_texture(struct pipe_context *ctx,
  75                                          struct r300_transfer *r300transfer)
  76 {
  77     struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
  78     struct pipe_resource *tex = transfer->resource;
  79     struct pipe_subresource subsrc;
  80
  81     subsrc.face = 0;
  82     subsrc.level = 0;
  83
  84     /* XXX this flush prevents the following DRM error from occuring:
  85      * [drm:radeon_cs_ioctl] *ERROR* Failed to parse relocation !
  86      * Reproducible with perf/copytex. */
  87     ctx->flush(ctx, 0, NULL);
  88
  89     ctx->resource_copy_region(ctx, tex, transfer->sr,
  90                               transfer->box.x, transfer->box.y, transfer->box.z,
  91                               &r300transfer->detiled_texture->b.b, subsrc,
  92                               0, 0, 0,
  93                               transfer->box.width, transfer->box.height);
  94
  95     /* XXX this flush fixes a few piglit tests (e.g. glean/pixelFormats). */
  96     ctx->flush(ctx, 0, NULL);
  97 }
  98
  99 struct pipe_transfer*
 100 r300_texture_get_transfer(struct pipe_context *ctx,
 101                           struct pipe_resource *texture,
 102                           struct pipe_subresource sr,
 103                           unsigned usage,
 104                           const struct pipe_box *box)
 105 {
 106     struct r300_texture *tex = r300_texture(texture);
 107     struct r300_screen *r300screen = r300_screen(ctx->screen);
 108     struct r300_transfer *trans;
 109     struct pipe_resource base;
 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         if (tex->microtile || tex->macrotile) {
 122             trans->render_target_usage =
 123                 util_format_is_depth_or_stencil(texture->format) ?
 124                 PIPE_BIND_DEPTH_STENCIL :
 125                 PIPE_BIND_RENDER_TARGET;
 126
 127             base.target = PIPE_TEXTURE_2D;
 128             base.format = texture->format;
 129             base.width0 = box->width;
 130             base.height0 = box->height;
 131             base.depth0 = 0;
 132             base.last_level = 0;
 133             base.nr_samples = 0;
 134             base.usage = PIPE_USAGE_DYNAMIC;
 135             base.bind = 0;
 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 |= trans->render_target_usage;
 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->detiled_texture = r300_texture(
 151                ctx->screen->resource_create(ctx->screen,
 152                                             &base));
 153
 154             assert(!trans->detiled_texture->microtile &&
 155                    !trans->detiled_texture->macrotile);
 156
 157             /* Set the stride.
 158              *
 159              * Even though we are using an internal texture for this,
 160              * the transfer sr, box and usage parameters still reflect
 161              * the arguments received to get_transfer.  We just do the
 162              * right thing internally.
 163              */
 164             trans->transfer.stride =
 165                 r300_texture_get_stride(r300screen, trans->detiled_texture, 0);
 166
 167             if (usage & PIPE_TRANSFER_READ) {
 168                 /* We cannot map a tiled texture directly because the data is
 169                  * in a different order, therefore we do detiling using a blit. */
 170                 r300_copy_from_tiled_texture(ctx, trans);
 171             }
 172         } else {
 173             trans->transfer.stride =
 174                 r300_texture_get_stride(r300screen, tex, sr.level);
 175             trans->offset = r300_texture_get_offset(tex, sr.level, box->z, sr.face);
 176         }
 177     }
 178     return &trans->transfer;
 179 }
 180
 181 void r300_texture_transfer_destroy(struct pipe_context *ctx,
 182                                    struct pipe_transfer *trans)
 183 {
 184     struct r300_transfer *r300transfer = r300_transfer(trans);
 185
 186     if (r300transfer->detiled_texture) {
 187         if (trans->usage & PIPE_TRANSFER_WRITE) {
 188             r300_copy_into_tiled_texture(ctx, r300transfer);
 189         }
 190
 191         pipe_resource_reference(
 192             (struct pipe_resource**)&r300transfer->detiled_texture, NULL);
 193     }
 194     pipe_resource_reference(&trans->resource, NULL);
 195     FREE(trans);
 196 }
 197
 198 void* r300_texture_transfer_map(struct pipe_context *ctx,
 199                                 struct pipe_transfer *transfer)
 200 {
 201     struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
 202     struct r300_transfer *r300transfer = r300_transfer(transfer);
 203     struct r300_texture *tex = r300_texture(transfer->resource);
 204     char *map;
 205     enum pipe_format format = tex->b.b.format;
 206
 207     if (r300transfer->detiled_texture) {
 208         /* The detiled texture is of the same size as the region being mapped
 209          * (no offset needed). */
 210         return rws->buffer_map(rws,
 211                                r300transfer->detiled_texture->buffer,
 212                                transfer->usage);
 213     } else {
 214         /* Tiling is disabled. */
 215         map = rws->buffer_map(rws, tex->buffer,
 216                               transfer->usage);
 217
 218         if (!map) {
 219             return NULL;
 220         }
 221
 222         return map + r300_transfer(transfer)->offset +
 223             transfer->box.y / util_format_get_blockheight(format) * transfer->stride +
 224             transfer->box.x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 225     }
 226 }
 227
 228 void r300_texture_transfer_unmap(struct pipe_context *ctx,
 229                                  struct pipe_transfer *transfer)
 230 {
 231     struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
 232     struct r300_transfer *r300transfer = r300_transfer(transfer);
 233     struct r300_texture *tex = r300_texture(transfer->resource);
 234
 235     if (r300transfer->detiled_texture) {
 236         rws->buffer_unmap(rws, r300transfer->detiled_texture->buffer);
 237     } else {
 238         rws->buffer_unmap(rws, tex->buffer);
 239     }
 240 }
 241