src/panfrost/lib/pan_pool.h

   1 /*
   2  * © Copyright 2017-2018 Alyssa Rosenzweig
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  *
  23  */
  24
  25 #ifndef __PAN_POOL_H__
  26 #define __PAN_POOL_H__
  27
  28 #include <stddef.h>
  29 #include <midgard_pack.h>
  30
  31 /* Represents a pool of memory that can only grow, used to allocate objects
  32  * with the same lifetime as the pool itself. In OpenGL, a pool is owned by the
  33  * batch for transient structures. In Vulkan, it may be owned by e.g. the
  34  * command pool */
  35
  36 struct pan_pool {
  37         /* Parent device for allocation */
  38         struct panfrost_device *dev;
  39
  40         /* panfrost_bo -> access_flags owned by the pool */
  41         struct hash_table *bos;
  42
  43         /* Current transient BO */
  44         struct panfrost_bo *transient_bo;
  45
  46         /* Within the topmost transient BO, how much has been used? */
  47         unsigned transient_offset;
  48
  49         /* BO flags to use in the pool */
  50         unsigned create_flags;
  51 };
  52
  53 void
  54 panfrost_pool_init(struct pan_pool *pool, void *memctx,
  55                    struct panfrost_device *dev, unsigned create_flags,
  56                    bool prealloc);
  57
  58 /* Represents a fat pointer for GPU-mapped memory, returned from the transient
  59  * allocator and not used for much else */
  60
  61 struct panfrost_transfer {
  62         uint8_t *cpu;
  63         mali_ptr gpu;
  64 };
  65
  66 struct panfrost_transfer
  67 panfrost_pool_alloc_aligned(struct pan_pool *pool, size_t sz, unsigned alignment);
  68
  69 /* Default to self-alignment */
  70
  71 static inline struct panfrost_transfer
  72 panfrost_pool_alloc(struct pan_pool *pool, size_t sz)
  73 {
  74         assert(sz == util_next_power_of_two(sz));
  75         return panfrost_pool_alloc_aligned(pool, sz, sz);
  76 }
  77
  78 struct panfrost_transfer
  79 panfrost_pool_alloc(struct pan_pool *pool, size_t sz);
  80
  81 mali_ptr
  82 panfrost_pool_upload(struct pan_pool *pool, const void *data, size_t sz);
  83
  84 mali_ptr
  85 panfrost_pool_upload_aligned(struct pan_pool *pool, const void *data, size_t sz, unsigned alignment);
  86
  87 #endif