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_screen *screen = ctx->screen;
  60     struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
  61     struct pipe_resource *tex = transfer->resource;
  62     struct pipe_surface *src, *dst;
  63
  64     src = screen->get_tex_surface(screen, tex,
  65                                   transfer->sr.face,
  66                                   transfer->sr.level,
  67                                   transfer->box.z,
  68                                   PIPE_BIND_BLIT_SOURCE);
  69
  70     dst = screen->get_tex_surface(screen, &r300transfer->detiled_texture->b.b,
  71                                   0, 0, 0,
  72                                   PIPE_BIND_BLIT_DESTINATION);
  73
  74     ctx->surface_copy(ctx, dst, 0, 0, src,
  75                       transfer->box.x, transfer->box.y,
  76                       transfer->box.width, transfer->box.height);
  77
  78     pipe_surface_reference(&src, NULL);
  79     pipe_surface_reference(&dst, NULL);
  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_screen *screen = ctx->screen;
  87     struct pipe_transfer *transfer = (struct pipe_transfer*)r300transfer;
  88     struct pipe_resource *tex = transfer->resource;
  89     struct pipe_surface *src, *dst;
  90
  91     src = screen->get_tex_surface(screen, &r300transfer->detiled_texture->b.b,
  92                                   0, 0, 0,
  93                                   PIPE_BIND_BLIT_SOURCE);
  94
  95     dst = screen->get_tex_surface(screen, tex,
  96                                   transfer->sr.face,
  97                                   transfer->sr.level,
  98                                   transfer->box.z,
  99                                   PIPE_BIND_BLIT_DESTINATION);
 100
 101     /* XXX this flush prevents the following DRM error from occuring:
 102      * [drm:radeon_cs_ioctl] *ERROR* Failed to parse relocation !
 103      * Reproducible with perf/copytex. */
 104     ctx->flush(ctx, 0, NULL);
 105
 106     ctx->surface_copy(ctx, dst,
 107                       transfer->box.x, transfer->box.y,
 108                       src, 0, 0,
 109                       transfer->box.width, transfer->box.height);
 110
 111     /* XXX this flush fixes a few piglit tests (e.g. glean/pixelFormats). */
 112     ctx->flush(ctx, 0, NULL);
 113
 114     pipe_surface_reference(&src, NULL);
 115     pipe_surface_reference(&dst, NULL);
 116 }
 117
 118 struct pipe_transfer*
 119 r300_texture_get_transfer(struct pipe_context *ctx,
 120                           struct pipe_resource *texture,
 121                           struct pipe_subresource sr,
 122                           unsigned usage,
 123                           const struct pipe_box *box)
 124 {
 125     struct r300_texture *tex = r300_texture(texture);
 126     struct r300_screen *r300screen = r300_screen(ctx->screen);
 127     struct r300_transfer *trans;
 128     struct pipe_resource base;
 129
 130     trans = CALLOC_STRUCT(r300_transfer);
 131     if (trans) {
 132         /* Initialize the transfer object. */
 133         pipe_resource_reference(&trans->transfer.resource, texture);
 134         trans->transfer.sr = sr;
 135         trans->transfer.usage = usage;
 136         trans->transfer.box = *box;
 137
 138         /* If the texture is tiled, we must create a temporary detiled texture
 139          * for this transfer. */
 140         if (tex->microtile || tex->macrotile) {
 141             trans->render_target_usage =
 142                 util_format_is_depth_or_stencil(texture->format) ?
 143                 PIPE_BIND_DEPTH_STENCIL :
 144                 PIPE_BIND_RENDER_TARGET;
 145
 146             base.target = PIPE_TEXTURE_2D;
 147             base.format = texture->format;
 148             base.width0 = box->width;
 149             base.height0 = box->height;
 150             base.depth0 = 0;
 151             base.last_level = 0;
 152             base.nr_samples = 0;
 153             base.usage = PIPE_USAGE_DYNAMIC;
 154             base.bind = 0;
 155             base.flags = R300_RESOURCE_FLAG_TRANSFER;
 156
 157             /* For texture reading, the temporary (detiled) texture is used as
 158              * a render target when blitting from a tiled texture. */
 159             if (usage & PIPE_TRANSFER_READ) {
 160                 base.bind |= trans->render_target_usage;
 161             }
 162             /* For texture writing, the temporary texture is used as a sampler
 163              * when blitting into a tiled texture. */
 164             if (usage & PIPE_TRANSFER_WRITE) {
 165                 base.bind |= PIPE_BIND_SAMPLER_VIEW;
 166             }
 167
 168             /* Create the temporary texture. */
 169             trans->detiled_texture = r300_texture(
 170                ctx->screen->resource_create(ctx->screen,
 171                                             &base));
 172
 173             assert(!trans->detiled_texture->microtile &&
 174                    !trans->detiled_texture->macrotile);
 175
 176             /* Set the stride.
 177              *
 178              * Even though we are using an internal texture for this,
 179              * the transfer sr, box and usage parameters still reflect
 180              * the arguments received to get_transfer.  We just do the
 181              * right thing internally.
 182              */
 183             trans->transfer.stride =
 184                 r300_texture_get_stride(r300screen, trans->detiled_texture, 0);
 185
 186             if (usage & PIPE_TRANSFER_READ) {
 187                 /* We cannot map a tiled texture directly because the data is
 188                  * in a different order, therefore we do detiling using a blit. */
 189                 r300_copy_from_tiled_texture(ctx, trans);
 190             }
 191         } else {
 192             trans->transfer.stride =
 193                 r300_texture_get_stride(r300screen, tex, sr.level);
 194             trans->offset = r300_texture_get_offset(tex, sr.level, box->z, sr.face);
 195         }
 196     }
 197     return &trans->transfer;
 198 }
 199
 200 void r300_texture_transfer_destroy(struct pipe_context *ctx,
 201                                    struct pipe_transfer *trans)
 202 {
 203     struct r300_transfer *r300transfer = r300_transfer(trans);
 204
 205     if (r300transfer->detiled_texture) {
 206         if (trans->usage & PIPE_TRANSFER_WRITE) {
 207             r300_copy_into_tiled_texture(ctx, r300transfer);
 208         }
 209
 210         pipe_resource_reference(
 211             (struct pipe_resource**)&r300transfer->detiled_texture, NULL);
 212     }
 213     pipe_resource_reference(&trans->resource, NULL);
 214     FREE(trans);
 215 }
 216
 217 void* r300_texture_transfer_map(struct pipe_context *ctx,
 218                                 struct pipe_transfer *transfer)
 219 {
 220     struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
 221     struct r300_transfer *r300transfer = r300_transfer(transfer);
 222     struct r300_texture *tex = r300_texture(transfer->resource);
 223     char *map;
 224     enum pipe_format format = tex->b.b.format;
 225
 226     if (r300transfer->detiled_texture) {
 227         /* The detiled texture is of the same size as the region being mapped
 228          * (no offset needed). */
 229         return rws->buffer_map(rws,
 230                                r300transfer->detiled_texture->buffer,
 231                                transfer->usage);
 232     } else {
 233         /* Tiling is disabled. */
 234         map = rws->buffer_map(rws, tex->buffer,
 235                               transfer->usage);
 236
 237         if (!map) {
 238             return NULL;
 239         }
 240
 241         return map + r300_transfer(transfer)->offset +
 242             transfer->box.y / util_format_get_blockheight(format) * transfer->stride +
 243             transfer->box.x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 244     }
 245 }
 246
 247 void r300_texture_transfer_unmap(struct pipe_context *ctx,
 248                                  struct pipe_transfer *transfer)
 249 {
 250     struct r300_winsys_screen *rws = (struct r300_winsys_screen *)ctx->winsys;
 251     struct r300_transfer *r300transfer = r300_transfer(transfer);
 252     struct r300_texture *tex = r300_texture(transfer->resource);
 253
 254     if (r300transfer->detiled_texture) {
 255         rws->buffer_unmap(rws, r300transfer->detiled_texture->buffer);
 256     } else {
 257         rws->buffer_unmap(rws, tex->buffer);
 258     }
 259 }
 260