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      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 
    141