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 /* Transient command stream pooling: command stream uploads try to simply copy
  31  * into whereever we left off. If there isn't space, we allocate a new entry
  32  * into the pool and copy there */
  33
  34 static struct panfrost_bo *
  35 panfrost_pool_alloc_backing(struct pan_pool *pool, size_t bo_sz)
  36 {
  37         /* We don't know what the BO will be used for, so let's flag it
  38          * RW and attach it to both the fragment and vertex/tiler jobs.
  39          * TODO: if we want fine grained BO assignment we should pass
  40          * flags to this function and keep the read/write,
  41          * fragment/vertex+tiler pools separate.
  42          */
  43         struct panfrost_bo *bo = panfrost_bo_create(pool->dev, bo_sz,
  44                         pool->create_flags);
  45
  46         uintptr_t flags = PAN_BO_ACCESS_PRIVATE |
  47                 PAN_BO_ACCESS_RW |
  48                 PAN_BO_ACCESS_VERTEX_TILER |
  49                 PAN_BO_ACCESS_FRAGMENT;
  50
  51         _mesa_hash_table_insert(pool->bos, bo, (void *) flags);
  52
  53         pool->transient_bo = bo;
  54         pool->transient_offset = 0;
  55
  56         return bo;
  57 }
  58
  59 struct pan_pool
  60 panfrost_create_pool(void *memctx, struct panfrost_device *dev,
  61                 unsigned create_flags, bool prealloc)
  62 {
  63         struct pan_pool pool = {
  64                 .dev = dev,
  65                 .create_flags = create_flags,
  66                 .transient_offset = 0,
  67                 .transient_bo = NULL
  68         };
  69
  70         pool.bos = _mesa_hash_table_create(memctx, _mesa_hash_pointer,
  71                         _mesa_key_pointer_equal);
  72
  73         if (prealloc)
  74                 panfrost_pool_alloc_backing(&pool, TRANSIENT_SLAB_SIZE);
  75
  76         return pool;
  77 }
  78
  79 struct panfrost_transfer
  80 panfrost_pool_alloc_aligned(struct pan_pool *pool, size_t sz, unsigned alignment)
  81 {
  82         /* Find or create a suitable BO */
  83         struct panfrost_bo *bo = pool->transient_bo;
  84         unsigned offset = ALIGN_POT(pool->transient_offset, alignment);
  85
  86         /* If we don't fit, allocate a new backing */
  87         if (unlikely(bo == NULL || (offset + sz) >= TRANSIENT_SLAB_SIZE)) {
  88                 bo = panfrost_pool_alloc_backing(pool,
  89                                 ALIGN_POT(MAX2(TRANSIENT_SLAB_SIZE, sz), 4096));
  90                 offset = 0;
  91         }
  92
  93         pool->transient_offset = offset + sz;
  94
  95         struct panfrost_transfer ret = {
  96                 .cpu = bo->cpu + offset,
  97                 .gpu = bo->gpu + offset,
  98         };
  99
 100         return ret;
 101 }
 102
 103 mali_ptr
 104 panfrost_pool_upload(struct pan_pool *pool, const void *data, size_t sz)
 105 {
 106         struct panfrost_transfer transfer = panfrost_pool_alloc(pool, sz);
 107         memcpy(transfer.cpu, data, sz);
 108         return transfer.gpu;
 109 }