src/gallium/drivers/vc4/vc4_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 VC4_BUFMGR_H
  25 #define VC4_BUFMGR_H
  26
  27 #include <stdint.h>
  28 #include "util/u_hash_table.h"
  29 #include "util/u_inlines.h"
  30 #include "vc4_qir.h"
  31
  32 struct vc4_context;
  33
  34 struct vc4_bo {
  35         struct pipe_reference reference;
  36         struct vc4_screen *screen;
  37         void *map;
  38         const char *name;
  39         uint32_t handle;
  40         uint32_t size;
  41
  42         /* This will be read/written by multiple threads without a lock -- you
  43          * should take a snapshot and use it to see if you happen to be in the
  44          * CL's handles at this position, to make most lookups O(1).  It's
  45          * volatile to make sure that the compiler doesn't emit multiple loads
  46          * from the address, which would make the lookup racy.
  47          */
  48         volatile uint32_t last_hindex;
  49
  50         /** Entry in the linked list of buffers freed, by age. */
  51         struct list_head time_list;
  52         /** Entry in the per-page-count linked list of buffers freed (by age). */
  53         struct list_head size_list;
  54         /** Approximate second when the bo was freed. */
  55         time_t free_time;
  56         /**
  57          * Whether only our process has a reference to the BO (meaning that
  58          * it's safe to reuse it in the BO cache).
  59          */
  60         bool private;
  61 };
  62
  63 struct vc4_bo *vc4_bo_alloc(struct vc4_screen *screen, uint32_t size,
  64                             const char *name);
  65 struct vc4_bo *vc4_bo_alloc_shader(struct vc4_screen *screen, const void *data,
  66                                    uint32_t size);
  67 void vc4_bo_last_unreference(struct vc4_bo *bo);
  68 void vc4_bo_last_unreference_locked_timed(struct vc4_bo *bo, time_t time);
  69 struct vc4_bo *vc4_bo_open_name(struct vc4_screen *screen, uint32_t name);
  70 struct vc4_bo *vc4_bo_open_dmabuf(struct vc4_screen *screen, int fd);
  71 bool vc4_bo_flink(struct vc4_bo *bo, uint32_t *name);
  72 int vc4_bo_get_dmabuf(struct vc4_bo *bo);
  73
  74 void vc4_bo_debug_describe(char* buf, const struct vc4_bo *ptr);
  75 static inline struct vc4_bo *
  76 vc4_bo_reference(struct vc4_bo *bo)
  77 {
  78         pipe_reference_described(NULL, &bo->reference,
  79                                  (debug_reference_descriptor)
  80                                  vc4_bo_debug_describe);
  81         return bo;
  82 }
  83
  84 static inline void
  85 vc4_bo_unreference(struct vc4_bo **bo)
  86 {
  87         struct vc4_screen *screen;
  88         if (!*bo)
  89                 return;
  90
  91         if ((*bo)->private) {
  92                 /* Avoid the mutex for private BOs */
  93                 if (pipe_reference_described(&(*bo)->reference, NULL,
  94                                              (debug_reference_descriptor)
  95                                              vc4_bo_debug_describe)) {
  96                         vc4_bo_last_unreference(*bo);
  97                 }
  98         } else {
  99                 screen = (*bo)->screen;
 100                 mtx_lock(&screen->bo_handles_mutex);
 101
 102                 if (pipe_reference_described(&(*bo)->reference, NULL,
 103                                              (debug_reference_descriptor)
 104                                              vc4_bo_debug_describe)) {
 105                         _mesa_hash_table_remove_key(screen->bo_handles,
 106                                                (void *)(uintptr_t)(*bo)->handle);
 107                         vc4_bo_last_unreference(*bo);
 108                 }
 109
 110                 mtx_unlock(&screen->bo_handles_mutex);
 111         }
 112
 113         *bo = NULL;
 114 }
 115
 116 static inline void
 117 vc4_bo_unreference_locked_timed(struct vc4_bo **bo, time_t time)
 118 {
 119         if (!*bo)
 120                 return;
 121
 122         if (pipe_reference_described(&(*bo)->reference, NULL,
 123                                      (debug_reference_descriptor)
 124                                      vc4_bo_debug_describe)) {
 125                 vc4_bo_last_unreference_locked_timed(*bo, time);
 126         }
 127         *bo = NULL;
 128 }
 129
 130 void *
 131 vc4_bo_map(struct vc4_bo *bo);
 132
 133 void *
 134 vc4_bo_map_unsynchronized(struct vc4_bo *bo);
 135
 136 bool
 137 vc4_bo_wait(struct vc4_bo *bo, uint64_t timeout_ns, const char *reason);
 138
 139 bool
 140 vc4_wait_seqno(struct vc4_screen *screen, uint64_t seqno, uint64_t timeout_ns,
 141                const char *reason);
 142
 143 void
 144 vc4_bo_label(struct vc4_screen *screen, struct vc4_bo *bo, const char *fmt, ...);
 145
 146 void
 147 vc4_bufmgr_destroy(struct pipe_screen *pscreen);
 148
 149 #endif /* VC4_BUFMGR_H */
 150