src/gallium/drivers/v3d/v3d_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 "v3d_screen.h"
  32
  33 struct v3d_context;
  34
  35 struct v3d_bo {
  36         struct pipe_reference reference;
  37         struct v3d_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 v3d_bo *v3d_bo_alloc(struct v3d_screen *screen, uint32_t size,
  60                             const char *name);
  61 void v3d_bo_last_unreference(struct v3d_bo *bo);
  62 void v3d_bo_last_unreference_locked_timed(struct v3d_bo *bo, time_t time);
  63 struct v3d_bo *v3d_bo_open_name(struct v3d_screen *screen, uint32_t name);
  64 struct v3d_bo *v3d_bo_open_dmabuf(struct v3d_screen *screen, int fd);
  65 bool v3d_bo_flink(struct v3d_bo *bo, uint32_t *name);
  66 int v3d_bo_get_dmabuf(struct v3d_bo *bo);
  67
  68 static inline void
  69 v3d_bo_set_reference(struct v3d_bo **old_bo, struct v3d_bo *new_bo)
  70 {
  71         if (pipe_reference(&(*old_bo)->reference, &new_bo->reference))
  72                 v3d_bo_last_unreference(*old_bo);
  73         *old_bo = new_bo;
  74 }
  75
  76 static inline struct v3d_bo *
  77 v3d_bo_reference(struct v3d_bo *bo)
  78 {
  79         pipe_reference(NULL, &bo->reference);
  80         return bo;
  81 }
  82
  83 static inline void
  84 v3d_bo_unreference(struct v3d_bo **bo)
  85 {
  86         struct v3d_screen *screen;
  87         if (!*bo)
  88                 return;
  89
  90         if ((*bo)->private) {
  91                 /* Avoid the mutex for private BOs */
  92                 if (pipe_reference(&(*bo)->reference, NULL))
  93                         v3d_bo_last_unreference(*bo);
  94         } else {
  95                 screen = (*bo)->screen;
  96                 mtx_lock(&screen->bo_handles_mutex);
  97
  98                 if (pipe_reference(&(*bo)->reference, NULL)) {
  99                         util_hash_table_remove(screen->bo_handles,
 100                                                (void *)(uintptr_t)(*bo)->handle);
 101                         v3d_bo_last_unreference(*bo);
 102                 }
 103
 104                 mtx_unlock(&screen->bo_handles_mutex);
 105         }
 106
 107         *bo = NULL;
 108 }
 109
 110 static inline void
 111 v3d_bo_unreference_locked_timed(struct v3d_bo **bo, time_t time)
 112 {
 113         if (!*bo)
 114                 return;
 115
 116         if (pipe_reference(&(*bo)->reference, NULL))
 117                 v3d_bo_last_unreference_locked_timed(*bo, time);
 118         *bo = NULL;
 119 }
 120
 121 void *
 122 v3d_bo_map(struct v3d_bo *bo);
 123
 124 void *
 125 v3d_bo_map_unsynchronized(struct v3d_bo *bo);
 126
 127 bool
 128 v3d_bo_wait(struct v3d_bo *bo, uint64_t timeout_ns, const char *reason);
 129
 130 bool
 131 v3d_wait_seqno(struct v3d_screen *screen, uint64_t seqno, uint64_t timeout_ns,
 132                const char *reason);
 133
 134 void
 135 v3d_bufmgr_destroy(struct pipe_screen *pscreen);
 136
 137 #endif /* VC5_BUFMGR_H */
 138