src/gallium/drivers/panfrost/pan_allocate.c

   1 /*
   2  * © Copyright 2018 Alyssa Rosenzweig
   3  * Copyright (C) 2019 Collabora, Ltd.
   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  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  */
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <assert.h>
  30 #include <panfrost-misc.h>
  31 #include <panfrost-job.h>
  32 #include "pan_bo.h"
  33 #include "pan_context.h"
  34
  35 /* TODO: What does this actually have to be? */
  36 #define ALIGNMENT 128
  37
  38 /* Transient command stream pooling: command stream uploads try to simply copy
  39  * into whereever we left off. If there isn't space, we allocate a new entry
  40  * into the pool and copy there */
  41
  42 struct panfrost_transfer
  43 panfrost_allocate_transient(struct panfrost_batch *batch, size_t sz)
  44 {
  45         struct panfrost_screen *screen = pan_screen(batch->ctx->base.screen);
  46
  47         /* Pad the size */
  48         sz = ALIGN_POT(sz, ALIGNMENT);
  49
  50         /* Find or create a suitable BO */
  51         struct panfrost_bo *bo = NULL;
  52
  53         unsigned offset = 0;
  54
  55         bool fits_in_current = (batch->transient_offset + sz) < TRANSIENT_SLAB_SIZE;
  56
  57         if (likely(batch->transient_bo && fits_in_current)) {
  58                 /* We can reuse the current BO, so get it */
  59                 bo = batch->transient_bo;
  60
  61                 /* Use the specified offset */
  62                 offset = batch->transient_offset;
  63                 batch->transient_offset = offset + sz;
  64         } else {
  65                 size_t bo_sz = sz < TRANSIENT_SLAB_SIZE ?
  66                                TRANSIENT_SLAB_SIZE : ALIGN_POT(sz, 4096);
  67
  68                 /* We can't reuse the current BO, but we can create a new one. */
  69                 bo = panfrost_bo_create(screen, bo_sz, 0);
  70                 panfrost_batch_add_bo(batch, bo);
  71
  72                 /* Creating a BO adds a reference, and then the job adds a
  73                  * second one. So we need to pop back one reference */
  74                 panfrost_bo_unreference(bo);
  75
  76                 if (sz < TRANSIENT_SLAB_SIZE) {
  77                         batch->transient_bo = bo;
  78                         batch->transient_offset = offset + sz;
  79                 }
  80         }
  81
  82         struct panfrost_transfer ret = {
  83                 .cpu = bo->cpu + offset,
  84                 .gpu = bo->gpu + offset,
  85         };
  86
  87         return ret;
  88
  89 }
  90
  91 mali_ptr
  92 panfrost_upload_transient(struct panfrost_batch *batch, const void *data,
  93                           size_t sz)
  94 {
  95         struct panfrost_transfer transfer = panfrost_allocate_transient(batch, sz);
  96         memcpy(transfer.cpu, data, sz);
  97         return transfer.gpu;
  98 }