aboutsummaryrefslogtreecommitdiff
path: root/libdrm/intel/intel_bufmgr_priv.h
blob: 76d31e47893c797f8ce71d58b4c2d15eb7eab85f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
/*
 * Copyright © 2008 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * Authors:
 *    Eric Anholt <eric@anholt.net>
 *
 */

/**
 * @file intel_bufmgr_priv.h
 *
 * Private definitions of Intel-specific bufmgr functions and structures.
 */

#ifndef INTEL_BUFMGR_PRIV_H
#define INTEL_BUFMGR_PRIV_H

/**
 * Context for a buffer manager instance.
 *
 * Contains public methods followed by private storage for the buffer manager.
 */
struct _drm_intel_bufmgr {
   /**
    * Allocate a buffer object.
    *
    * Buffer objects are not necessarily initially mapped into CPU virtual
    * address space or graphics device aperture.  They must be mapped using
    * bo_map() to be used by the CPU, and validated for use using bo_validate()
    * to be used from the graphics device.
    */
   drm_intel_bo *(*bo_alloc)(drm_intel_bufmgr *bufmgr, const char *name,
			     unsigned long size, unsigned int alignment);

   /** Takes a reference on a buffer object */
   void (*bo_reference)(drm_intel_bo *bo);

   /**
    * Releases a reference on a buffer object, freeing the data if
    * rerefences remain.
    */
   void (*bo_unreference)(drm_intel_bo *bo);

   /**
    * Maps the buffer into userspace.
    *
    * This function will block waiting for any existing execution on the
    * buffer to complete, first.  The resulting mapping is available at
    * buf->virtual.
    */
   int (*bo_map)(drm_intel_bo *bo, int write_enable);

   /** Reduces the refcount on the userspace mapping of the buffer object. */
   int (*bo_unmap)(drm_intel_bo *bo);

   /**
    * Write data into an object.
    *
    * This is an optional function, if missing,
    * drm_intel_bo will map/memcpy/unmap.
    */
   int (*bo_subdata)(drm_intel_bo *bo, unsigned long offset,
		     unsigned long size, const void *data);

   /**
    * Read data from an object
    *
    * This is an optional function, if missing,
    * drm_intel_bo will map/memcpy/unmap.
    */
   int (*bo_get_subdata)(drm_intel_bo *bo, unsigned long offset,
			 unsigned long size, void *data);

   /**
    * Waits for rendering to an object by the GPU to have completed.
    *
    * This is not required for any access to the BO by bo_map, bo_subdata, etc.
    * It is merely a way for the driver to implement glFinish.
    */
   void (*bo_wait_rendering)(drm_intel_bo *bo);

   /**
    * Tears down the buffer manager instance.
    */
   void (*destroy)(drm_intel_bufmgr *bufmgr);

    /**
     * Add relocation entry in reloc_buf, which will be updated with the
     * target buffer's real offset on on command submission.
     *
     * Relocations remain in place for the lifetime of the buffer object.
     *
     * \param bo Buffer to write the relocation into.
     * \param offset Byte offset within reloc_bo of the pointer to target_bo.
     * \param target_bo Buffer whose offset should be written into the
     *                  relocation entry.
     * \param target_offset Constant value to be added to target_bo's offset in
     *	                    relocation entry.
     * \param read_domains GEM read domains which the buffer will be read into
     *	      by the command that this relocation is part of.
     * \param write_domains GEM read domains which the buffer will be dirtied
     *	      in by the command that this relocation is part of.
     */
    int (*bo_emit_reloc)(drm_intel_bo *bo, uint32_t offset,
			 drm_intel_bo *target_bo, uint32_t target_offset,
			 uint32_t read_domains, uint32_t write_domain);

    /** Executes the command buffer pointed to by bo. */
    int (*bo_exec)(drm_intel_bo *bo, int used,
		   drm_clip_rect_t *cliprects, int num_cliprects,
		   int DR4);

    /**
     * Pin a buffer to the aperture and fix the offset until unpinned
     *
     * \param buf Buffer to pin
     * \param alignment Required alignment for aperture, in bytes
     */
    int (*bo_pin)(drm_intel_bo *bo, uint32_t alignment);
    /**
     * Unpin a buffer from the aperture, allowing it to be removed
     *
     * \param buf Buffer to unpin
     */
    int (*bo_unpin)(drm_intel_bo *bo);
    /**
     * Ask that the buffer be placed in tiling mode
     *
     * \param buf Buffer to set tiling mode for
     * \param tiling_mode desired, and returned tiling mode
     */
    int (*bo_set_tiling)(drm_intel_bo *bo, uint32_t *tiling_mode,
			 uint32_t stride);
    /**
     * Get the current tiling (and resulting swizzling) mode for the bo.
     *
     * \param buf Buffer to get tiling mode for
     * \param tiling_mode returned tiling mode
     * \param swizzle_mode returned swizzling mode
     */
    int (*bo_get_tiling)(drm_intel_bo *bo, uint32_t *tiling_mode,
			 uint32_t *swizzle_mode);
    /**
     * Create a visible name for a buffer which can be used by other apps
     *
     * \param buf Buffer to create a name for
     * \param name Returned name
     */
    int (*bo_flink)(drm_intel_bo *bo, uint32_t *name);

    int (*check_aperture_space)(drm_intel_bo **bo_array, int count);
    int debug; /**< Enables verbose debugging printouts */
};

#endif /* INTEL_BUFMGR_PRIV_H */