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_ptr {
72         /* CPU address */
73         void *cpu;
74 
75         /* GPU address */
76         mali_ptr gpu;
77 };
78 
79 struct panfrost_bo {
80         /* Must be first for casting */
81         struct list_head bucket_link;
82 
83         /* Used to link the BO to the BO cache LRU list. */
84         struct list_head lru_link;
85 
86         /* Store the time this BO was use last, so the BO cache logic can evict
87          * stale BOs.
88          */
89         time_t last_used;
90 
91         /* Atomic reference count */
92         int32_t refcnt;
93 
94         struct panfrost_device *dev;
95 
96         /* Mapping for the entire object (all levels) */
97         struct panfrost_ptr ptr;
98 
99         /* Size of all entire trees */
100         size_t size;
101 
102         int gem_handle;
103 
104         uint32_t flags;
105 
106         /* Combination of PAN_BO_ACCESS_{READ,WRITE} flags encoding pending
107          * GPU accesses to this BO. Useful to avoid calling the WAIT_BO ioctl
108          * when the BO is idle.
109          */
110         uint32_t gpu_access;
111 };
112 
113 bool
114 panfrost_bo_wait(struct panfrost_bo *bo, int64_t timeout_ns, bool wait_readers);
115 void
116 panfrost_bo_reference(struct panfrost_bo *bo);
117 void
118 panfrost_bo_unreference(struct panfrost_bo *bo);
119 struct panfrost_bo *
120 panfrost_bo_create(struct panfrost_device *dev, size_t size,
121                    uint32_t flags);
122 void
123 panfrost_bo_mmap(struct panfrost_bo *bo);
124 struct panfrost_bo *
125 panfrost_bo_import(struct panfrost_device *dev, int fd);
126 int
127 panfrost_bo_export(struct panfrost_bo *bo);
128 void
129 panfrost_bo_cache_evict_all(struct panfrost_device *dev);
130 
131 #endif /* __PAN_BO_H__ */
132