src/panfrost/lib/pan_bo.h

   1 /*
   2  * © Copyright 2019 Alyssa Rosenzweig
   3  * © Copyright 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 #ifndef __PAN_BO_H__
  27 #define __PAN_BO_H__
  28
  29 #include "util/list.h"
  30 #include "pan_device.h"
  31 #include <time.h>
  32
  33 /* Flags for allocated memory */
  34
  35 /* This memory region is executable */
  36 #define PAN_BO_EXECUTE            (1 << 0)
  37
  38 /* This memory region should be lazily allocated and grow-on-page-fault. Must
  39  * be used in conjunction with INVISIBLE */
  40 #define PAN_BO_GROWABLE           (1 << 1)
  41
  42 /* This memory region should not be mapped to the CPU */
  43 #define PAN_BO_INVISIBLE          (1 << 2)
  44
  45 /* This region may not be used immediately and will not mmap on allocate
  46  * (semantically distinct from INVISIBLE, which cannot never be mmaped) */
  47 #define PAN_BO_DELAY_MMAP         (1 << 3)
  48
  49 /* BO is shared across processes (imported or exported) and therefore cannot be
  50  * cached locally */
  51 #define PAN_BO_SHARED             (1 << 4)
  52
  53 /* GPU access flags */
  54
  55 /* BO is either shared (can be accessed by more than one GPU batch) or private
  56  * (reserved by a specific GPU job). */
  57 #define PAN_BO_ACCESS_PRIVATE         (0 << 0)
  58 #define PAN_BO_ACCESS_SHARED          (1 << 0)
  59
  60 /* BO is being read/written by the GPU */
  61 #define PAN_BO_ACCESS_READ            (1 << 1)
  62 #define PAN_BO_ACCESS_WRITE           (1 << 2)
  63 #define PAN_BO_ACCESS_RW              (PAN_BO_ACCESS_READ | PAN_BO_ACCESS_WRITE)
  64
  65 /* BO is accessed by the vertex/tiler job. */
  66 #define PAN_BO_ACCESS_VERTEX_TILER    (1 << 3)
  67
  68 /* BO is accessed by the fragment job. */
  69 #define PAN_BO_ACCESS_FRAGMENT        (1 << 4)
  70
  71 struct panfrost_bo {
  72         /* Must be first for casting */
  73         struct list_head bucket_link;
  74
  75         /* Used to link the BO to the BO cache LRU list. */
  76         struct list_head lru_link;
  77
  78         /* Store the time this BO was use last, so the BO cache logic can evict
  79          * stale BOs.
  80          */
  81         time_t last_used;
  82
  83         /* Atomic reference count */
  84         int32_t refcnt;
  85
  86         struct panfrost_device *dev;
  87
  88         /* Mapping for the entire object (all levels) */
  89         uint8_t *cpu;
  90
  91         /* GPU address for the object */
  92         mali_ptr gpu;
  93
  94         /* Size of all entire trees */
  95         size_t size;
  96
  97         int gem_handle;
  98
  99         uint32_t flags;
 100
 101         /* Combination of PAN_BO_ACCESS_{READ,WRITE} flags encoding pending
 102          * GPU accesses to this BO. Useful to avoid calling the WAIT_BO ioctl
 103          * when the BO is idle.
 104          */
 105         uint32_t gpu_access;
 106 };
 107
 108 bool
 109 panfrost_bo_wait(struct panfrost_bo *bo, int64_t timeout_ns, bool wait_readers);
 110 void
 111 panfrost_bo_reference(struct panfrost_bo *bo);
 112 void
 113 panfrost_bo_unreference(struct panfrost_bo *bo);
 114 struct panfrost_bo *
 115 panfrost_bo_create(struct panfrost_device *dev, size_t size,
 116                    uint32_t flags);
 117 void
 118 panfrost_bo_mmap(struct panfrost_bo *bo);
 119 struct panfrost_bo *
 120 panfrost_bo_import(struct panfrost_device *dev, int fd);
 121 int
 122 panfrost_bo_export(struct panfrost_bo *bo);
 123 void
 124 panfrost_bo_cache_evict_all(struct panfrost_device *dev);
 125
 126 #endif /* __PAN_BO_H__ */