src/gallium/drivers/vc5/vc5_bufmgr.h

   1 /*
   2  * Copyright © 2014 Broadcom
   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
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #ifndef VC5_BUFMGR_H
  25 #define VC5_BUFMGR_H
  26
  27 #include <stdint.h>
  28 #include "util/u_hash_table.h"
  29 #include "util/u_inlines.h"
  30 #include "util/list.h"
  31 #include "vc5_screen.h"
  32
  33 struct vc5_context;
  34
  35 struct vc5_bo {
  36         struct pipe_reference reference;
  37         struct vc5_screen *screen;
  38         void *map;
  39         const char *name;
  40         uint32_t handle;
  41         uint32_t size;
  42
  43         /* Address of the BO in our page tables. */
  44         uint32_t offset;
  45
  46         /** Entry in the linked list of buffers freed, by age. */
  47         struct list_head time_list;
  48         /** Entry in the per-page-count linked list of buffers freed (by age). */
  49         struct list_head size_list;
  50         /** Approximate second when the bo was freed. */
  51         time_t free_time;
  52         /**
  53          * Whether only our process has a reference to the BO (meaning that
  54          * it's safe to reuse it in the BO cache).
  55          */
  56         bool private;
  57 };
  58
  59 struct vc5_bo *vc5_bo_alloc(struct vc5_screen *screen, uint32_t size,
  60                             const char *name);
  61 void vc5_bo_last_unreference(struct vc5_bo *bo);
  62 void vc5_bo_last_unreference_locked_timed(struct vc5_bo *bo, time_t time);
  63 struct vc5_bo *vc5_bo_open_name(struct vc5_screen *screen, uint32_t name,
  64                                 uint32_t winsys_stride);
  65 struct vc5_bo *vc5_bo_open_dmabuf(struct vc5_screen *screen, int fd,
  66                                   uint32_t winsys_stride);
  67 bool vc5_bo_flink(struct vc5_bo *bo, uint32_t *name);
  68 int vc5_bo_get_dmabuf(struct vc5_bo *bo);
  69
  70 static inline void
  71 vc5_bo_set_reference(struct vc5_bo **old_bo, struct vc5_bo *new_bo)
  72 {
  73         if (pipe_reference(&(*old_bo)->reference, &new_bo->reference))
  74                 vc5_bo_last_unreference(*old_bo);
  75         *old_bo = new_bo;
  76 }
  77
  78 static inline struct vc5_bo *
  79 vc5_bo_reference(struct vc5_bo *bo)
  80 {
  81         pipe_reference(NULL, &bo->reference);
  82         return bo;
  83 }
  84
  85 static inline void
  86 vc5_bo_unreference(struct vc5_bo **bo)
  87 {
  88         struct vc5_screen *screen;
  89         if (!*bo)
  90                 return;
  91
  92         if ((*bo)->private) {
  93                 /* Avoid the mutex for private BOs */
  94                 if (pipe_reference(&(*bo)->reference, NULL))
  95                         vc5_bo_last_unreference(*bo);
  96         } else {
  97                 screen = (*bo)->screen;
  98                 mtx_lock(&screen->bo_handles_mutex);
  99
 100                 if (pipe_reference(&(*bo)->reference, NULL)) {
 101                         util_hash_table_remove(screen->bo_handles,
 102                                                (void *)(uintptr_t)(*bo)->handle);
 103                         vc5_bo_last_unreference(*bo);
 104                 }
 105
 106                 mtx_unlock(&screen->bo_handles_mutex);
 107         }
 108
 109         *bo = NULL;
 110 }
 111
 112 static inline void
 113 vc5_bo_unreference_locked_timed(struct vc5_bo **bo, time_t time)
 114 {
 115         if (!*bo)
 116                 return;
 117
 118         if (pipe_reference(&(*bo)->reference, NULL))
 119                 vc5_bo_last_unreference_locked_timed(*bo, time);
 120         *bo = NULL;
 121 }
 122
 123 void *
 124 vc5_bo_map(struct vc5_bo *bo);
 125
 126 void *
 127 vc5_bo_map_unsynchronized(struct vc5_bo *bo);
 128
 129 bool
 130 vc5_bo_wait(struct vc5_bo *bo, uint64_t timeout_ns, const char *reason);
 131
 132 bool
 133 vc5_wait_seqno(struct vc5_screen *screen, uint64_t seqno, uint64_t timeout_ns,
 134                const char *reason);
 135
 136 void
 137 vc5_bufmgr_destroy(struct pipe_screen *pscreen);
 138
 139 #endif /* VC5_BUFMGR_H */
 140