2 * Copyright 2014, 2015 Red Hat.
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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
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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
;
43 bool doflushwait
= false;
45 if (usage
& PIPE_TRANSFER_READ
)
48 doflushwait
= virgl_res_needs_flush_wait(vctx
, vbuf
, usage
);
51 ctx
->flush(ctx
, NULL
, 0);
53 trans
= virgl_resource_create_transfer(ctx
, resource
, &vbuf
->metadata
, level
,
56 readback
= virgl_res_needs_readback(vctx
, vbuf
, usage
);
58 vs
->vws
->transfer_get(vs
->vws
, vbuf
->hw_res
, box
, trans
->base
.stride
,
59 trans
->l_stride
, trans
->offset
, level
);
61 if (!(usage
& PIPE_TRANSFER_UNSYNCHRONIZED
))
64 if (doflushwait
|| readback
)
65 vs
->vws
->resource_wait(vs
->vws
, vbuf
->hw_res
);
67 ptr
= vs
->vws
->resource_map(vs
->vws
, vbuf
->hw_res
);
72 *transfer
= &trans
->base
;
73 return ptr
+ trans
->offset
;
76 static void virgl_buffer_transfer_unmap(struct pipe_context
*ctx
,
77 struct pipe_transfer
*transfer
)
79 struct virgl_context
*vctx
= virgl_context(ctx
);
80 struct virgl_transfer
*trans
= virgl_transfer(transfer
);
81 struct virgl_resource
*vbuf
= virgl_resource(transfer
->resource
);
83 if (trans
->base
.usage
& PIPE_TRANSFER_WRITE
) {
84 struct virgl_screen
*vs
= virgl_screen(ctx
->screen
);
85 if (transfer
->usage
& PIPE_TRANSFER_FLUSH_EXPLICIT
) {
86 if (trans
->range
.end
<= trans
->range
.start
)
89 transfer
->box
.x
+= trans
->range
.start
;
90 transfer
->box
.width
= trans
->range
.end
- trans
->range
.start
;
91 trans
->offset
= transfer
->box
.x
;
94 vctx
->num_transfers
++;
95 vs
->vws
->transfer_put(vs
->vws
, vbuf
->hw_res
,
96 &transfer
->box
, trans
->base
.stride
,
97 trans
->l_stride
, trans
->offset
,
103 virgl_resource_destroy_transfer(vctx
, trans
);
106 static void virgl_buffer_transfer_flush_region(struct pipe_context
*ctx
,
107 struct pipe_transfer
*transfer
,
108 const struct pipe_box
*box
)
110 struct virgl_resource
*vbuf
= virgl_resource(transfer
->resource
);
111 struct virgl_transfer
*trans
= virgl_transfer(transfer
);
114 * FIXME: This is not optimal. For example,
116 * glMapBufferRange(.., 0, 100, GL_MAP_FLUSH_EXPLICIT_BIT)
117 * glFlushMappedBufferRange(.., 25, 30)
118 * glFlushMappedBufferRange(.., 65, 70)
120 * We'll end up flushing 25 --> 70.
122 util_range_add(&trans
->range
, box
->x
, box
->x
+ box
->width
);
123 vbuf
->clean
[0] = FALSE
;
126 static const struct u_resource_vtbl virgl_buffer_vtbl
=
128 u_default_resource_get_handle
, /* get_handle */
129 virgl_resource_destroy
, /* resource_destroy */
130 virgl_buffer_transfer_map
, /* transfer_map */
131 virgl_buffer_transfer_flush_region
, /* transfer_flush_region */
132 virgl_buffer_transfer_unmap
, /* transfer_unmap */
135 void virgl_buffer_init(struct virgl_resource
*res
)
137 res
->u
.vtbl
= &virgl_buffer_vtbl
;