src/gallium/drivers/radeon/r600_buffer_common.c

   1 /*
   2  * Copyright 2013 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *      Marek Olšák
  25  */
  26
  27 #include "r600_cs.h"
  28 #include "util/u_memory.h"
  29 #include "util/u_upload_mgr.h"
  30 #include <inttypes.h>
  31 #include <stdio.h>
  32
  33 boolean r600_rings_is_buffer_referenced(struct r600_common_context *ctx,
  34                                         struct radeon_winsys_cs_handle *buf,
  35                                         enum radeon_bo_usage usage)
  36 {
  37         if (ctx->ws->cs_is_buffer_referenced(ctx->rings.gfx.cs, buf, usage)) {
  38                 return TRUE;
  39         }
  40         if (ctx->rings.dma.cs && ctx->rings.dma.cs->cdw &&
  41             ctx->ws->cs_is_buffer_referenced(ctx->rings.dma.cs, buf, usage)) {
  42                 return TRUE;
  43         }
  44         return FALSE;
  45 }
  46
  47 void *r600_buffer_map_sync_with_rings(struct r600_common_context *ctx,
  48                                       struct r600_resource *resource,
  49                                       unsigned usage)
  50 {
  51         enum radeon_bo_usage rusage = RADEON_USAGE_READWRITE;
  52         bool busy = false;
  53
  54         if (usage & PIPE_TRANSFER_UNSYNCHRONIZED) {
  55                 return ctx->ws->buffer_map(resource->cs_buf, NULL, usage);
  56         }
  57
  58         if (!(usage & PIPE_TRANSFER_WRITE)) {
  59                 /* have to wait for the last write */
  60                 rusage = RADEON_USAGE_WRITE;
  61         }
  62
  63         if (ctx->rings.gfx.cs->cdw != ctx->initial_gfx_cs_size &&
  64             ctx->ws->cs_is_buffer_referenced(ctx->rings.gfx.cs,
  65                                              resource->cs_buf, rusage)) {
  66                 if (usage & PIPE_TRANSFER_DONTBLOCK) {
  67                         ctx->rings.gfx.flush(ctx, RADEON_FLUSH_ASYNC, NULL);
  68                         return NULL;
  69                 } else {
  70                         ctx->rings.gfx.flush(ctx, 0, NULL);
  71                         busy = true;
  72                 }
  73         }
  74         if (ctx->rings.dma.cs &&
  75             ctx->rings.dma.cs->cdw &&
  76             ctx->ws->cs_is_buffer_referenced(ctx->rings.dma.cs,
  77                                              resource->cs_buf, rusage)) {
  78                 if (usage & PIPE_TRANSFER_DONTBLOCK) {
  79                         ctx->rings.dma.flush(ctx, RADEON_FLUSH_ASYNC, NULL);
  80                         return NULL;
  81                 } else {
  82                         ctx->rings.dma.flush(ctx, 0, NULL);
  83                         busy = true;
  84                 }
  85         }
  86
  87         if (busy || !ctx->ws->buffer_wait(resource->buf, 0, rusage)) {
  88                 if (usage & PIPE_TRANSFER_DONTBLOCK) {
  89                         return NULL;
  90                 } else {
  91                         /* We will be wait for the GPU. Wait for any offloaded
  92                          * CS flush to complete to avoid busy-waiting in the winsys. */
  93                         ctx->ws->cs_sync_flush(ctx->rings.gfx.cs);
  94                         if (ctx->rings.dma.cs)
  95                                 ctx->ws->cs_sync_flush(ctx->rings.dma.cs);
  96                 }
  97         }
  98
  99         /* Setting the CS to NULL will prevent doing checks we have done already. */
 100         return ctx->ws->buffer_map(resource->cs_buf, NULL, usage);
 101 }
 102
 103 bool r600_init_resource(struct r600_common_screen *rscreen,
 104                         struct r600_resource *res,
 105                         unsigned size, unsigned alignment,
 106                         bool use_reusable_pool)
 107 {
 108         struct r600_texture *rtex = (struct r600_texture*)res;
 109         struct pb_buffer *old_buf, *new_buf;
 110         enum radeon_bo_flag flags = 0;
 111
 112         switch (res->b.b.usage) {
 113         case PIPE_USAGE_STREAM:
 114                 flags = RADEON_FLAG_GTT_WC;
 115                 /* fall through */
 116         case PIPE_USAGE_STAGING:
 117                 /* Transfers are likely to occur more often with these resources. */
 118                 res->domains = RADEON_DOMAIN_GTT;
 119                 break;
 120         case PIPE_USAGE_DYNAMIC:
 121                 /* Older kernels didn't always flush the HDP cache before
 122                  * CS execution
 123                  */
 124                 if (rscreen->info.drm_minor < 40) {
 125                         res->domains = RADEON_DOMAIN_GTT;
 126                         flags |= RADEON_FLAG_GTT_WC;
 127                         break;
 128                 }
 129                 flags |= RADEON_FLAG_CPU_ACCESS;
 130                 /* fall through */
 131         case PIPE_USAGE_DEFAULT:
 132         case PIPE_USAGE_IMMUTABLE:
 133         default:
 134                 /* Not listing GTT here improves performance in some apps. */
 135                 res->domains = RADEON_DOMAIN_VRAM;
 136                 flags |= RADEON_FLAG_GTT_WC;
 137                 break;
 138         }
 139
 140         if (res->b.b.target == PIPE_BUFFER &&
 141             res->b.b.flags & (PIPE_RESOURCE_FLAG_MAP_PERSISTENT |
 142                               PIPE_RESOURCE_FLAG_MAP_COHERENT)) {
 143                 /* Use GTT for all persistent mappings with older kernels,
 144                  * because they didn't always flush the HDP cache before CS
 145                  * execution.
 146                  *
 147                  * Write-combined CPU mappings are fine, the kernel ensures all CPU
 148                  * writes finish before the GPU executes a command stream.
 149                  */
 150                 if (rscreen->info.drm_minor < 40)
 151                         res->domains = RADEON_DOMAIN_GTT;
 152                 else if (res->domains & RADEON_DOMAIN_VRAM)
 153                         flags |= RADEON_FLAG_CPU_ACCESS;
 154         }
 155
 156         /* Tiled textures are unmappable. Always put them in VRAM. */
 157         if (res->b.b.target != PIPE_BUFFER &&
 158             rtex->surface.level[0].mode >= RADEON_SURF_MODE_1D) {
 159                 res->domains = RADEON_DOMAIN_VRAM;
 160                 flags &= ~RADEON_FLAG_CPU_ACCESS;
 161                 flags |= RADEON_FLAG_NO_CPU_ACCESS;
 162         }
 163
 164         if (rscreen->debug_flags & DBG_NO_WC)
 165                 flags &= ~RADEON_FLAG_GTT_WC;
 166
 167         /* Allocate a new resource. */
 168         new_buf = rscreen->ws->buffer_create(rscreen->ws, size, alignment,
 169                                              use_reusable_pool,
 170                                              res->domains, flags);
 171         if (!new_buf) {
 172                 return false;
 173         }
 174
 175         /* Replace the pointer such that if res->buf wasn't NULL, it won't be
 176          * NULL. This should prevent crashes with multiple contexts using
 177          * the same buffer where one of the contexts invalidates it while
 178          * the others are using it. */
 179         old_buf = res->buf;
 180         res->cs_buf = rscreen->ws->buffer_get_cs_handle(new_buf); /* should be atomic */
 181         res->buf = new_buf; /* should be atomic */
 182
 183         if (rscreen->info.r600_virtual_address)
 184                 res->gpu_address = rscreen->ws->buffer_get_virtual_address(res->cs_buf);
 185         else
 186                 res->gpu_address = 0;
 187
 188         pb_reference(&old_buf, NULL);
 189
 190         util_range_set_empty(&res->valid_buffer_range);
 191         res->TC_L2_dirty = false;
 192
 193         if (rscreen->debug_flags & DBG_VM && res->b.b.target == PIPE_BUFFER) {
 194                 fprintf(stderr, "VM start=0x%"PRIX64"  end=0x%"PRIX64" | Buffer %u bytes\n",
 195                         res->gpu_address, res->gpu_address + res->buf->size,
 196                         res->buf->size);
 197         }
 198         return true;
 199 }
 200
 201 static void r600_buffer_destroy(struct pipe_screen *screen,
 202                                 struct pipe_resource *buf)
 203 {
 204         struct r600_resource *rbuffer = r600_resource(buf);
 205
 206         util_range_destroy(&rbuffer->valid_buffer_range);
 207         pb_reference(&rbuffer->buf, NULL);
 208         FREE(rbuffer);
 209 }
 210
 211 static void *r600_buffer_get_transfer(struct pipe_context *ctx,
 212                                       struct pipe_resource *resource,
 213                                       unsigned level,
 214                                       unsigned usage,
 215                                       const struct pipe_box *box,
 216                                       struct pipe_transfer **ptransfer,
 217                                       void *data, struct r600_resource *staging,
 218                                       unsigned offset)
 219 {
 220         struct r600_common_context *rctx = (struct r600_common_context*)ctx;
 221         struct r600_transfer *transfer = util_slab_alloc(&rctx->pool_transfers);
 222
 223         transfer->transfer.resource = resource;
 224         transfer->transfer.level = level;
 225         transfer->transfer.usage = usage;
 226         transfer->transfer.box = *box;
 227         transfer->transfer.stride = 0;
 228         transfer->transfer.layer_stride = 0;
 229         transfer->offset = offset;
 230         transfer->staging = staging;
 231         *ptransfer = &transfer->transfer;
 232         return data;
 233 }
 234
 235 static bool r600_can_dma_copy_buffer(struct r600_common_context *rctx,
 236                                      unsigned dstx, unsigned srcx, unsigned size)
 237 {
 238         bool dword_aligned = !(dstx % 4) && !(srcx % 4) && !(size % 4);
 239
 240         return rctx->screen->has_cp_dma ||
 241                (dword_aligned && (rctx->rings.dma.cs ||
 242                                   rctx->screen->has_streamout));
 243
 244 }
 245
 246 static void *r600_buffer_transfer_map(struct pipe_context *ctx,
 247                                       struct pipe_resource *resource,
 248                                       unsigned level,
 249                                       unsigned usage,
 250                                       const struct pipe_box *box,
 251                                       struct pipe_transfer **ptransfer)
 252 {
 253         struct r600_common_context *rctx = (struct r600_common_context*)ctx;
 254         struct r600_common_screen *rscreen = (struct r600_common_screen*)ctx->screen;
 255         struct r600_resource *rbuffer = r600_resource(resource);
 256         uint8_t *data;
 257
 258         assert(box->x + box->width <= resource->width0);
 259
 260         /* See if the buffer range being mapped has never been initialized,
 261          * in which case it can be mapped unsynchronized. */
 262         if (!(usage & PIPE_TRANSFER_UNSYNCHRONIZED) &&
 263             usage & PIPE_TRANSFER_WRITE &&
 264             !util_ranges_intersect(&rbuffer->valid_buffer_range, box->x, box->x + box->width)) {
 265                 usage |= PIPE_TRANSFER_UNSYNCHRONIZED;
 266         }
 267
 268         /* If discarding the entire range, discard the whole resource instead. */
 269         if (usage & PIPE_TRANSFER_DISCARD_RANGE &&
 270             box->x == 0 && box->width == resource->width0) {
 271                 usage |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
 272         }
 273
 274         if (usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE &&
 275             !(usage & PIPE_TRANSFER_UNSYNCHRONIZED)) {
 276                 assert(usage & PIPE_TRANSFER_WRITE);
 277
 278                 /* Check if mapping this buffer would cause waiting for the GPU. */
 279                 if (r600_rings_is_buffer_referenced(rctx, rbuffer->cs_buf, RADEON_USAGE_READWRITE) ||
 280                     !rctx->ws->buffer_wait(rbuffer->buf, 0, RADEON_USAGE_READWRITE)) {
 281                         rctx->invalidate_buffer(&rctx->b, &rbuffer->b.b);
 282                 }
 283                 /* At this point, the buffer is always idle. */
 284                 usage |= PIPE_TRANSFER_UNSYNCHRONIZED;
 285         }
 286         else if ((usage & PIPE_TRANSFER_DISCARD_RANGE) &&
 287                  !(usage & PIPE_TRANSFER_UNSYNCHRONIZED) &&
 288                  !(rscreen->debug_flags & DBG_NO_DISCARD_RANGE) &&
 289                  r600_can_dma_copy_buffer(rctx, box->x, 0, box->width)) {
 290                 assert(usage & PIPE_TRANSFER_WRITE);
 291
 292                 /* Check if mapping this buffer would cause waiting for the GPU. */
 293                 if (r600_rings_is_buffer_referenced(rctx, rbuffer->cs_buf, RADEON_USAGE_READWRITE) ||
 294                     !rctx->ws->buffer_wait(rbuffer->buf, 0, RADEON_USAGE_READWRITE)) {
 295                         /* Do a wait-free write-only transfer using a temporary buffer. */
 296                         unsigned offset;
 297                         struct r600_resource *staging = NULL;
 298
 299                         u_upload_alloc(rctx->uploader, 0, box->width + (box->x % R600_MAP_BUFFER_ALIGNMENT),
 300                                        &offset, (struct pipe_resource**)&staging, (void**)&data);
 301
 302                         if (staging) {
 303                                 data += box->x % R600_MAP_BUFFER_ALIGNMENT;
 304                                 return r600_buffer_get_transfer(ctx, resource, level, usage, box,
 305                                                                 ptransfer, data, staging, offset);
 306                         } else {
 307                                 return NULL; /* error, shouldn't occur though */
 308                         }
 309                 }
 310                 /* At this point, the buffer is always idle (we checked it above). */
 311                 usage |= PIPE_TRANSFER_UNSYNCHRONIZED;
 312         }
 313         /* Using a staging buffer in GTT for larger reads is much faster. */
 314         else if ((usage & PIPE_TRANSFER_READ) &&
 315                  !(usage & PIPE_TRANSFER_WRITE) &&
 316                  rbuffer->domains == RADEON_DOMAIN_VRAM &&
 317                  r600_can_dma_copy_buffer(rctx, 0, box->x, box->width)) {
 318                 struct r600_resource *staging;
 319
 320                 staging = (struct r600_resource*) pipe_buffer_create(
 321                                 ctx->screen, PIPE_BIND_TRANSFER_READ, PIPE_USAGE_STAGING,
 322                                 box->width + (box->x % R600_MAP_BUFFER_ALIGNMENT));
 323                 if (staging) {
 324                         /* Copy the VRAM buffer to the staging buffer. */
 325                         rctx->dma_copy(ctx, &staging->b.b, 0,
 326                                        box->x % R600_MAP_BUFFER_ALIGNMENT,
 327                                        0, 0, resource, level, box);
 328
 329                         data = r600_buffer_map_sync_with_rings(rctx, staging, PIPE_TRANSFER_READ);
 330                         data += box->x % R600_MAP_BUFFER_ALIGNMENT;
 331
 332                         return r600_buffer_get_transfer(ctx, resource, level, usage, box,
 333                                                         ptransfer, data, staging, 0);
 334                 }
 335         }
 336
 337         data = r600_buffer_map_sync_with_rings(rctx, rbuffer, usage);
 338         if (!data) {
 339                 return NULL;
 340         }
 341         data += box->x;
 342
 343         return r600_buffer_get_transfer(ctx, resource, level, usage, box,
 344                                         ptransfer, data, NULL, 0);
 345 }
 346
 347 static void r600_buffer_transfer_unmap(struct pipe_context *ctx,
 348                                        struct pipe_transfer *transfer)
 349 {
 350         struct r600_common_context *rctx = (struct r600_common_context*)ctx;
 351         struct r600_transfer *rtransfer = (struct r600_transfer*)transfer;
 352         struct r600_resource *rbuffer = r600_resource(transfer->resource);
 353
 354         if (rtransfer->staging) {
 355                 if (rtransfer->transfer.usage & PIPE_TRANSFER_WRITE) {
 356                         struct pipe_resource *dst, *src;
 357                         unsigned soffset, doffset, size;
 358                         struct pipe_box box;
 359
 360                         dst = transfer->resource;
 361                         src = &rtransfer->staging->b.b;
 362                         size = transfer->box.width;
 363                         doffset = transfer->box.x;
 364                         soffset = rtransfer->offset + transfer->box.x % R600_MAP_BUFFER_ALIGNMENT;
 365
 366                         u_box_1d(soffset, size, &box);
 367
 368                         /* Copy the staging buffer into the original one. */
 369                         rctx->dma_copy(ctx, dst, 0, doffset, 0, 0, src, 0, &box);
 370                 }
 371                 pipe_resource_reference((struct pipe_resource**)&rtransfer->staging, NULL);
 372         }
 373
 374         if (transfer->usage & PIPE_TRANSFER_WRITE) {
 375                 util_range_add(&rbuffer->valid_buffer_range, transfer->box.x,
 376                                transfer->box.x + transfer->box.width);
 377         }
 378         util_slab_free(&rctx->pool_transfers, transfer);
 379 }
 380
 381 static const struct u_resource_vtbl r600_buffer_vtbl =
 382 {
 383         NULL,                           /* get_handle */
 384         r600_buffer_destroy,            /* resource_destroy */
 385         r600_buffer_transfer_map,       /* transfer_map */
 386         NULL,                           /* transfer_flush_region */
 387         r600_buffer_transfer_unmap,     /* transfer_unmap */
 388         NULL                            /* transfer_inline_write */
 389 };
 390
 391 static struct r600_resource *
 392 r600_alloc_buffer_struct(struct pipe_screen *screen,
 393                          const struct pipe_resource *templ)
 394 {
 395         struct r600_resource *rbuffer;
 396
 397         rbuffer = MALLOC_STRUCT(r600_resource);
 398
 399         rbuffer->b.b = *templ;
 400         pipe_reference_init(&rbuffer->b.b.reference, 1);
 401         rbuffer->b.b.screen = screen;
 402         rbuffer->b.vtbl = &r600_buffer_vtbl;
 403         rbuffer->buf = NULL;
 404         rbuffer->TC_L2_dirty = false;
 405         util_range_init(&rbuffer->valid_buffer_range);
 406         return rbuffer;
 407 }
 408
 409 struct pipe_resource *r600_buffer_create(struct pipe_screen *screen,
 410                                          const struct pipe_resource *templ,
 411                                          unsigned alignment)
 412 {
 413         struct r600_common_screen *rscreen = (struct r600_common_screen*)screen;
 414         struct r600_resource *rbuffer = r600_alloc_buffer_struct(screen, templ);
 415
 416         if (!r600_init_resource(rscreen, rbuffer, templ->width0, alignment, TRUE)) {
 417                 FREE(rbuffer);
 418                 return NULL;
 419         }
 420         return &rbuffer->b.b;
 421 }
 422
 423 struct pipe_resource *
 424 r600_buffer_from_user_memory(struct pipe_screen *screen,
 425                              const struct pipe_resource *templ,
 426                              void *user_memory)
 427 {
 428         struct r600_common_screen *rscreen = (struct r600_common_screen*)screen;
 429         struct radeon_winsys *ws = rscreen->ws;
 430         struct r600_resource *rbuffer = r600_alloc_buffer_struct(screen, templ);
 431
 432         rbuffer->domains = RADEON_DOMAIN_GTT;
 433         util_range_add(&rbuffer->valid_buffer_range, 0, templ->width0);
 434
 435         /* Convert a user pointer to a buffer. */
 436         rbuffer->buf = ws->buffer_from_ptr(ws, user_memory, templ->width0);
 437         if (!rbuffer->buf) {
 438                 FREE(rbuffer);
 439                 return NULL;
 440         }
 441
 442         rbuffer->cs_buf = ws->buffer_get_cs_handle(rbuffer->buf);
 443
 444         if (rscreen->info.r600_virtual_address)
 445                 rbuffer->gpu_address =
 446                         ws->buffer_get_virtual_address(rbuffer->cs_buf);
 447         else
 448                 rbuffer->gpu_address = 0;
 449
 450         return &rbuffer->b.b;
 451 }