src/panfrost/lib/pan_pool.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 "util/hash_table.h"
  27 #include "pan_bo.h"
  28 #include "pan_pool.h"
  29
  30 /* TODO: What does this actually have to be? */
  31 #define ALIGNMENT 128
  32
  33 /* Transient command stream pooling: command stream uploads try to simply copy
  34  * into whereever we left off. If there isn't space, we allocate a new entry
  35  * into the pool and copy there */
  36
  37 struct pan_pool
  38 panfrost_create_pool(void *memctx, struct panfrost_device *dev)
  39 {
  40         struct pan_pool pool = {
  41                 .dev = dev,
  42                 .transient_offset = 0,
  43                 .transient_bo = NULL
  44         };
  45
  46         pool.bos = _mesa_hash_table_create(memctx, _mesa_hash_pointer,
  47                         _mesa_key_pointer_equal);
  48
  49
  50         return pool;
  51 }
  52
  53 struct panfrost_transfer
  54 panfrost_pool_alloc(struct pan_pool *pool, size_t sz)
  55 {
  56         /* Pad the size */
  57         sz = ALIGN_POT(sz, ALIGNMENT);
  58
  59         /* Find or create a suitable BO */
  60         struct panfrost_bo *bo = NULL;
  61
  62         unsigned offset = 0;
  63
  64         bool fits_in_current = (pool->transient_offset + sz) < TRANSIENT_SLAB_SIZE;
  65
  66         if (likely(pool->transient_bo && fits_in_current)) {
  67                 /* We can reuse the current BO, so get it */
  68                 bo = pool->transient_bo;
  69
  70                 /* Use the specified offset */
  71                 offset = pool->transient_offset;
  72                 pool->transient_offset = offset + sz;
  73         } else {
  74                 size_t bo_sz = sz < TRANSIENT_SLAB_SIZE ?
  75                                TRANSIENT_SLAB_SIZE : ALIGN_POT(sz, 4096);
  76
  77                 /* We can't reuse the current BO, but we can create a new one.
  78                  * We don't know what the BO will be used for, so let's flag it
  79                  * RW and attach it to both the fragment and vertex/tiler jobs.
  80                  * TODO: if we want fine grained BO assignment we should pass
  81                  * flags to this function and keep the read/write,
  82                  * fragment/vertex+tiler pools separate.
  83                  */
  84                 bo = panfrost_bo_create(pool->dev, bo_sz, 0);
  85
  86                 uintptr_t flags = PAN_BO_ACCESS_PRIVATE |
  87                                   PAN_BO_ACCESS_RW |
  88                                   PAN_BO_ACCESS_VERTEX_TILER |
  89                                   PAN_BO_ACCESS_FRAGMENT;
  90
  91                 _mesa_hash_table_insert(pool->bos, bo, (void *) flags);
  92
  93                 if (sz < TRANSIENT_SLAB_SIZE) {
  94                         pool->transient_bo = bo;
  95                         pool->transient_offset = offset + sz;
  96                 }
  97         }
  98
  99         struct panfrost_transfer ret = {
 100                 .cpu = bo->cpu + offset,
 101                 .gpu = bo->gpu + offset,
 102         };
 103
 104         return ret;
 105
 106 }
 107
 108 mali_ptr
 109 panfrost_pool_upload(struct pan_pool *pool, const void *data, size_t sz)
 110 {
 111         struct panfrost_transfer transfer = panfrost_pool_alloc(pool, sz);
 112         memcpy(transfer.cpu, data, sz);
 113         return transfer.gpu;
 114 }