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      1 /****************************************************************************
      2  * Copyright (C) 2015 Intel Corporation.   All Rights Reserved.
      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  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8  * and/or sell copies of the Software, and to permit persons to whom the
      9  * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
     18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
     21  * IN THE SOFTWARE.
     22  ***************************************************************************/
     23 
     24 #include "util/u_memory.h"
     25 #include "swr_context.h"
     26 #include "swr_screen.h"
     27 #include "swr_scratch.h"
     28 #include "swr_fence_work.h"
     29 #include "api.h"
     30 
     31 
     32 void *
     33 swr_copy_to_scratch_space(struct swr_context *ctx,
     34                           struct swr_scratch_space *space,
     35                           const void *user_buffer,
     36                           unsigned int size)
     37 {
     38    void *ptr;
     39    assert(space);
     40    assert(size);
     41 
     42    if (size >= 2048) { /* XXX TODO create KNOB_ for this */
     43       /* Use per draw SwrAllocDrawContextMemory for larger copies */
     44       ptr = SwrAllocDrawContextMemory(ctx->swrContext, size, 4);
     45    } else {
     46       /* Allocate enough so that MAX_DRAWS_IN_FLIGHT sets fit. */
     47       unsigned int max_size_in_flight = size * KNOB_MAX_DRAWS_IN_FLIGHT;
     48 
     49       /* Need to grow space */
     50       if (max_size_in_flight > space->current_size) {
     51          space->current_size = max_size_in_flight;
     52 
     53          if (space->base) {
     54             /* defer delete, use aligned-free */
     55             struct swr_screen *screen = swr_screen(ctx->pipe.screen);
     56             swr_fence_work_free(screen->flush_fence, space->base, true);
     57             space->base = NULL;
     58          }
     59 
     60          if (!space->base) {
     61             space->base = (uint8_t *)AlignedMalloc(space->current_size,
     62                                                    sizeof(void *));
     63             space->head = (void *)space->base;
     64          }
     65       }
     66 
     67       /* Wrap */
     68       if (((uint8_t *)space->head + size)
     69           >= ((uint8_t *)space->base + space->current_size)) {
     70          space->head = space->base;
     71       }
     72 
     73       ptr = space->head;
     74       space->head = (uint8_t *)space->head + size;
     75    }
     76 
     77    /* Copy user_buffer to scratch */
     78    if (user_buffer)
     79       memcpy(ptr, user_buffer, size);
     80 
     81    return ptr;
     82 }
     83 
     84 
     85 void
     86 swr_init_scratch_buffers(struct swr_context *ctx)
     87 {
     88    struct swr_scratch_buffers *scratch;
     89 
     90    scratch = CALLOC_STRUCT(swr_scratch_buffers);
     91    ctx->scratch = scratch;
     92 }
     93 
     94 void
     95 swr_destroy_scratch_buffers(struct swr_context *ctx)
     96 {
     97    struct swr_scratch_buffers *scratch = ctx->scratch;
     98 
     99    if (scratch) {
    100       AlignedFree(scratch->vs_constants.base);
    101       AlignedFree(scratch->fs_constants.base);
    102       AlignedFree(scratch->vertex_buffer.base);
    103       AlignedFree(scratch->index_buffer.base);
    104       FREE(scratch);
    105    }
    106 }
    107