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         /* Pad the size */
  46         sz = ALIGN_POT(sz, ALIGNMENT);
  47
  48         /* Find or create a suitable BO */
  49         struct panfrost_bo *bo = NULL;
  50
  51         unsigned offset = 0;
  52
  53         bool fits_in_current = (batch->transient_offset + sz) < TRANSIENT_SLAB_SIZE;
  54
  55         if (likely(batch->transient_bo && fits_in_current)) {
  56                 /* We can reuse the current BO, so get it */
  57                 bo = batch->transient_bo;
  58
  59                 /* Use the specified offset */
  60                 offset = batch->transient_offset;
  61                 batch->transient_offset = offset + sz;
  62         } else {
  63                 size_t bo_sz = sz < TRANSIENT_SLAB_SIZE ?
  64                                TRANSIENT_SLAB_SIZE : ALIGN_POT(sz, 4096);
  65
  66                 /* We can't reuse the current BO, but we can create a new one.
  67                  * We don't know what the BO will be used for, so let's flag it
  68                  * RW and attach it to both the fragment and vertex/tiler jobs.
  69                  * TODO: if we want fine grained BO assignment we should pass
  70                  * flags to this function and keep the read/write,
  71                  * fragment/vertex+tiler pools separate.
  72                  */
  73                 bo = panfrost_batch_create_bo(batch, bo_sz, 0,
  74                                               PAN_BO_ACCESS_PRIVATE |
  75                                               PAN_BO_ACCESS_RW |
  76                                               PAN_BO_ACCESS_VERTEX_TILER |
  77                                               PAN_BO_ACCESS_FRAGMENT);
  78
  79                 if (sz < TRANSIENT_SLAB_SIZE) {
  80                         batch->transient_bo = bo;
  81                         batch->transient_offset = offset + sz;
  82                 }
  83         }
  84
  85         struct panfrost_transfer ret = {
  86                 .cpu = bo->cpu + offset,
  87                 .gpu = bo->gpu + offset,
  88         };
  89
  90         return ret;
  91
  92 }
  93
  94 mali_ptr
  95 panfrost_upload_transient(struct panfrost_batch *batch, const void *data,
  96                           size_t sz)
  97 {
  98         struct panfrost_transfer transfer = panfrost_allocate_transient(batch, sz);
  99         memcpy(transfer.cpu, data, sz);
 100         return transfer.gpu;
 101 }