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 *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     u_box_origin_2d(transfer->box.width, transfer->box.height, &src_box);
  90
  91     ctx->resource_copy_region(ctx, tex, transfer->level,
  92                               transfer->box.x, transfer->box.y, transfer->box.z,
  93                               &r300transfer->linear_texture->b.b, 0, &src_box);
  94
  95     /* XXX remove this. */
  96     r300_flush(ctx, 0, NULL);
  97 }
  98
  99 void *
 100 r300_texture_transfer_map(struct pipe_context *ctx,
 101                           struct pipe_resource *texture,
 102                           unsigned level,
 103                           unsigned usage,
 104                           const struct pipe_box *box,
 105                           struct pipe_transfer **transfer)
 106 {
 107     struct r300_context *r300 = r300_context(ctx);
 108     struct r300_resource *tex = r300_resource(texture);
 109     struct r300_transfer *trans;
 110     struct pipe_resource base;
 111     boolean referenced_cs, referenced_hw;
 112     enum pipe_format format = tex->b.b.format;
 113     char *map;
 114
 115     referenced_cs =
 116         r300->rws->cs_is_buffer_referenced(r300->cs, tex->cs_buf, RADEON_USAGE_READWRITE);
 117     if (referenced_cs) {
 118         referenced_hw = TRUE;
 119     } else {
 120         referenced_hw =
 121             r300->rws->buffer_is_busy(tex->buf, RADEON_USAGE_READWRITE);
 122     }
 123
 124     trans = CALLOC_STRUCT(r300_transfer);
 125     if (trans) {
 126         /* Initialize the transfer object. */
 127         trans->transfer.resource = texture;
 128         trans->transfer.level = level;
 129         trans->transfer.usage = usage;
 130         trans->transfer.box = *box;
 131
 132         /* If the texture is tiled, we must create a temporary detiled texture
 133          * for this transfer.
 134          * Also make write transfers pipelined. */
 135         if (tex->tex.microtile || tex->tex.macrotile[level] ||
 136             (referenced_hw && !(usage & PIPE_TRANSFER_READ) &&
 137              r300_is_blit_supported(texture->format))) {
 138             if (r300->blitter->running) {
 139                 fprintf(stderr, "r300: ERROR: Blitter recursion in texture_get_transfer.\n");
 140                 os_break();
 141             }
 142
 143             memset(&base, 0, sizeof(base));
 144             base.target = PIPE_TEXTURE_2D;
 145             base.format = texture->format;
 146             base.width0 = box->width;
 147             base.height0 = box->height;
 148             base.depth0 = 1;
 149             base.array_size = 1;
 150             base.usage = PIPE_USAGE_STAGING;
 151             base.flags = R300_RESOURCE_FLAG_TRANSFER;
 152
 153             /* Create the temporary texture. */
 154             trans->linear_texture = r300_resource(
 155                ctx->screen->resource_create(ctx->screen,
 156                                             &base));
 157
 158             if (!trans->linear_texture) {
 159                 /* Oh crap, the thing can't create the texture.
 160                  * Let's flush and try again. */
 161                 r300_flush(ctx, 0, NULL);
 162
 163                 trans->linear_texture = r300_resource(
 164                    ctx->screen->resource_create(ctx->screen,
 165                                                 &base));
 166
 167                 if (!trans->linear_texture) {
 168                     fprintf(stderr,
 169                             "r300: Failed to create a transfer object.\n");
 170                     FREE(trans);
 171                     return NULL;
 172                 }
 173             }
 174
 175             assert(!trans->linear_texture->tex.microtile &&
 176                    !trans->linear_texture->tex.macrotile[0]);
 177
 178             /* Set the stride. */
 179             trans->transfer.stride =
 180                     trans->linear_texture->tex.stride_in_bytes[0];
 181
 182             if (usage & PIPE_TRANSFER_READ) {
 183                 /* We cannot map a tiled texture directly because the data is
 184                  * in a different order, therefore we do detiling using a blit. */
 185                 r300_copy_from_tiled_texture(ctx, trans);
 186
 187                 /* Always referenced in the blit. */
 188                 r300_flush(ctx, 0, NULL);
 189             }
 190         } else {
 191             /* Unpipelined transfer. */
 192             trans->transfer.stride = tex->tex.stride_in_bytes[level];
 193             trans->offset = r300_texture_get_offset(tex, level, box->z);
 194
 195             if (referenced_cs &&
 196                 !(usage & PIPE_TRANSFER_UNSYNCHRONIZED)) {
 197                 r300_flush(ctx, 0, NULL);
 198             }
 199         }
 200     }
 201
 202     if (trans->linear_texture) {
 203         /* The detiled texture is of the same size as the region being mapped
 204          * (no offset needed). */
 205         map = r300->rws->buffer_map(trans->linear_texture->cs_buf,
 206                                     r300->cs, usage);
 207         if (!map) {
 208             pipe_resource_reference(
 209                 (struct pipe_resource**)&trans->linear_texture, NULL);
 210             FREE(trans);
 211             return NULL;
 212         }
 213         *transfer = &trans->transfer;
 214         return map;
 215     } else {
 216         /* Tiling is disabled. */
 217         map = r300->rws->buffer_map(tex->cs_buf, r300->cs, usage);
 218         if (!map) {
 219             FREE(trans);
 220             return NULL;
 221         }
 222
 223         *transfer = &trans->transfer;
 224         return map + trans->offset +
 225             box->y / util_format_get_blockheight(format) * trans->transfer.stride +
 226             box->x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 227     }
 228 }
 229
 230 void r300_texture_transfer_unmap(struct pipe_context *ctx,
 231                                  struct pipe_transfer *transfer)
 232 {
 233     struct radeon_winsys *rws = r300_context(ctx)->rws;
 234     struct r300_transfer *trans = r300_transfer(transfer);
 235     struct r300_resource *tex = r300_resource(transfer->resource);
 236
 237     if (trans->linear_texture) {
 238         rws->buffer_unmap(trans->linear_texture->cs_buf);
 239
 240         if (transfer->usage & PIPE_TRANSFER_WRITE) {
 241             r300_copy_into_tiled_texture(ctx, trans);
 242         }
 243
 244         pipe_resource_reference(
 245             (struct pipe_resource**)&trans->linear_texture, NULL);
 246     } else {
 247         rws->buffer_unmap(tex->cs_buf);
 248     }
 249     FREE(transfer);
 250 }