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