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 pan_pool
  43 panfrost_create_pool(void *memctx, struct panfrost_device *dev)
  44 {
  45         struct pan_pool pool = {
  46                 .dev = dev,
  47                 .transient_offset = 0,
  48                 .transient_bo = NULL
  49         };
  50
  51         pool.bos = _mesa_hash_table_create(memctx, _mesa_hash_pointer,
  52                         _mesa_key_pointer_equal);
  53
  54
  55         return pool;
  56 }
  57
  58 struct panfrost_transfer
  59 panfrost_pool_alloc(struct pan_pool *pool, size_t sz)
  60 {
  61         /* Pad the size */
  62         sz = ALIGN_POT(sz, ALIGNMENT);
  63
  64         /* Find or create a suitable BO */
  65         struct panfrost_bo *bo = NULL;
  66
  67         unsigned offset = 0;
  68
  69         bool fits_in_current = (pool->transient_offset + sz) < TRANSIENT_SLAB_SIZE;
  70
  71         if (likely(pool->transient_bo && fits_in_current)) {
  72                 /* We can reuse the current BO, so get it */
  73                 bo = pool->transient_bo;
  74
  75                 /* Use the specified offset */
  76                 offset = pool->transient_offset;
  77                 pool->transient_offset = offset + sz;
  78         } else {
  79                 size_t bo_sz = sz < TRANSIENT_SLAB_SIZE ?
  80                                TRANSIENT_SLAB_SIZE : ALIGN_POT(sz, 4096);
  81
  82                 /* We can't reuse the current BO, but we can create a new one.
  83                  * We don't know what the BO will be used for, so let's flag it
  84                  * RW and attach it to both the fragment and vertex/tiler jobs.
  85                  * TODO: if we want fine grained BO assignment we should pass
  86                  * flags to this function and keep the read/write,
  87                  * fragment/vertex+tiler pools separate.
  88                  */
  89                 bo = panfrost_bo_create(pool->dev, bo_sz, 0);
  90
  91                 uintptr_t flags = PAN_BO_ACCESS_PRIVATE |
  92                                   PAN_BO_ACCESS_RW |
  93                                   PAN_BO_ACCESS_VERTEX_TILER |
  94                                   PAN_BO_ACCESS_FRAGMENT;
  95
  96                 _mesa_hash_table_insert(pool->bos, bo, (void *) flags);
  97
  98                 if (sz < TRANSIENT_SLAB_SIZE) {
  99                         pool->transient_bo = bo;
 100                         pool->transient_offset = offset + sz;
 101                 }
 102         }
 103
 104         struct panfrost_transfer ret = {
 105                 .cpu = bo->cpu + offset,
 106                 .gpu = bo->gpu + offset,
 107         };
 108
 109         return ret;
 110
 111 }
 112
 113 mali_ptr
 114 panfrost_pool_upload(struct pan_pool *pool, const void *data, size_t sz)
 115 {
 116         struct panfrost_transfer transfer = panfrost_pool_alloc(pool, sz);
 117         memcpy(transfer.cpu, data, sz);
 118         return transfer.gpu;
 119 }