2 * Copyright 2014, 2015 Red Hat.
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
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9 * the Software is furnished to do so, subject to the following conditions:
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
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,
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21 * USE OR OTHER DEALINGS IN THE SOFTWARE.
24 #include "util/u_inlines.h"
25 #include "util/u_memory.h"
26 #include "virgl_context.h"
27 #include "virgl_resource.h"
28 #include "virgl_screen.h"
30 static void *virgl_buffer_transfer_map(struct pipe_context
*ctx
,
31 struct pipe_resource
*resource
,
34 const struct pipe_box
*box
,
35 struct pipe_transfer
**transfer
)
37 struct virgl_context
*vctx
= virgl_context(ctx
);
38 struct virgl_screen
*vs
= virgl_screen(ctx
->screen
);
39 struct virgl_resource
*vbuf
= virgl_resource(resource
);
40 struct virgl_transfer
*trans
;
41 enum virgl_transfer_map_type map_type
;
43 trans
= virgl_resource_create_transfer(&vctx
->transfer_pool
, resource
,
44 &vbuf
->metadata
, level
, usage
, box
);
46 map_type
= virgl_resource_transfer_prepare(vctx
, trans
);
48 case VIRGL_TRANSFER_MAP_HW_RES
:
49 trans
->hw_res_map
= vs
->vws
->resource_map(vs
->vws
, vbuf
->hw_res
);
51 case VIRGL_TRANSFER_MAP_ERROR
:
53 trans
->hw_res_map
= NULL
;
57 if (!trans
->hw_res_map
) {
58 virgl_resource_destroy_transfer(&vctx
->transfer_pool
, trans
);
62 if (usage
& PIPE_TRANSFER_WRITE
)
63 util_range_add(&vbuf
->valid_buffer_range
, box
->x
, box
->x
+ box
->width
);
65 *transfer
= &trans
->base
;
66 return trans
->hw_res_map
+ trans
->offset
;
69 static void virgl_buffer_transfer_unmap(struct pipe_context
*ctx
,
70 struct pipe_transfer
*transfer
)
72 struct virgl_context
*vctx
= virgl_context(ctx
);
73 struct virgl_transfer
*trans
= virgl_transfer(transfer
);
75 if (trans
->base
.usage
& PIPE_TRANSFER_WRITE
) {
76 if (transfer
->usage
& PIPE_TRANSFER_FLUSH_EXPLICIT
) {
77 if (trans
->range
.end
<= trans
->range
.start
) {
78 virgl_resource_destroy_transfer(&vctx
->transfer_pool
, trans
);
82 transfer
->box
.x
+= trans
->range
.start
;
83 transfer
->box
.width
= trans
->range
.end
- trans
->range
.start
;
84 trans
->offset
= transfer
->box
.x
;
87 virgl_transfer_queue_unmap(&vctx
->queue
, trans
);
89 virgl_resource_destroy_transfer(&vctx
->transfer_pool
, trans
);
92 static void virgl_buffer_transfer_flush_region(struct pipe_context
*ctx
,
93 struct pipe_transfer
*transfer
,
94 const struct pipe_box
*box
)
96 struct virgl_transfer
*trans
= virgl_transfer(transfer
);
99 * FIXME: This is not optimal. For example,
101 * glMapBufferRange(.., 0, 100, GL_MAP_FLUSH_EXPLICIT_BIT)
102 * glFlushMappedBufferRange(.., 25, 30)
103 * glFlushMappedBufferRange(.., 65, 70)
105 * We'll end up flushing 25 --> 70.
107 util_range_add(&trans
->range
, box
->x
, box
->x
+ box
->width
);
110 static const struct u_resource_vtbl virgl_buffer_vtbl
=
112 u_default_resource_get_handle
, /* get_handle */
113 virgl_resource_destroy
, /* resource_destroy */
114 virgl_buffer_transfer_map
, /* transfer_map */
115 virgl_buffer_transfer_flush_region
, /* transfer_flush_region */
116 virgl_buffer_transfer_unmap
, /* transfer_unmap */
119 void virgl_buffer_init(struct virgl_resource
*res
)
121 res
->u
.vtbl
= &virgl_buffer_vtbl
;