2 * Copyright 2014, 2015 Red Hat.
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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
;
45 trans
= virgl_resource_create_transfer(&vctx
->transfer_pool
, resource
,
46 &vbuf
->metadata
, level
, usage
, box
);
47 if (usage
& PIPE_TRANSFER_READ
)
50 flush
= virgl_res_needs_flush(vctx
, trans
);
53 ctx
->flush(ctx
, NULL
, 0);
55 readback
= virgl_res_needs_readback(vctx
, vbuf
, usage
, 0);
57 vs
->vws
->transfer_get(vs
->vws
, vbuf
->hw_res
, box
, trans
->base
.stride
,
58 trans
->l_stride
, trans
->offset
, level
);
60 vs
->vws
->resource_wait(vs
->vws
, vbuf
->hw_res
);
63 ptr
= vs
->vws
->resource_map(vs
->vws
, vbuf
->hw_res
);
65 virgl_resource_destroy_transfer(&vctx
->transfer_pool
, trans
);
69 *transfer
= &trans
->base
;
70 return ptr
+ trans
->offset
;
73 static void virgl_buffer_transfer_unmap(struct pipe_context
*ctx
,
74 struct pipe_transfer
*transfer
)
76 struct virgl_context
*vctx
= virgl_context(ctx
);
77 struct virgl_transfer
*trans
= virgl_transfer(transfer
);
79 if (trans
->base
.usage
& PIPE_TRANSFER_WRITE
) {
80 if (transfer
->usage
& PIPE_TRANSFER_FLUSH_EXPLICIT
) {
81 if (trans
->range
.end
<= trans
->range
.start
) {
82 virgl_resource_destroy_transfer(&vctx
->transfer_pool
, trans
);
86 transfer
->box
.x
+= trans
->range
.start
;
87 transfer
->box
.width
= trans
->range
.end
- trans
->range
.start
;
88 trans
->offset
= transfer
->box
.x
;
91 vctx
->num_transfers
++;
92 virgl_transfer_queue_unmap(&vctx
->queue
, trans
);
94 virgl_resource_destroy_transfer(&vctx
->transfer_pool
, trans
);
97 static void virgl_buffer_transfer_flush_region(struct pipe_context
*ctx
,
98 struct pipe_transfer
*transfer
,
99 const struct pipe_box
*box
)
101 struct virgl_transfer
*trans
= virgl_transfer(transfer
);
104 * FIXME: This is not optimal. For example,
106 * glMapBufferRange(.., 0, 100, GL_MAP_FLUSH_EXPLICIT_BIT)
107 * glFlushMappedBufferRange(.., 25, 30)
108 * glFlushMappedBufferRange(.., 65, 70)
110 * We'll end up flushing 25 --> 70.
112 util_range_add(&trans
->range
, box
->x
, box
->x
+ box
->width
);
115 static const struct u_resource_vtbl virgl_buffer_vtbl
=
117 u_default_resource_get_handle
, /* get_handle */
118 virgl_resource_destroy
, /* resource_destroy */
119 virgl_buffer_transfer_map
, /* transfer_map */
120 virgl_buffer_transfer_flush_region
, /* transfer_flush_region */
121 virgl_buffer_transfer_unmap
, /* transfer_unmap */
124 void virgl_buffer_init(struct virgl_resource
*res
)
126 res
->u
.vtbl
= &virgl_buffer_vtbl
;