1 /**********************************************************
2 * Copyright 2008-2009 VMware, Inc. All rights reserved.
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 **********************************************************/
28 #include "pipe/p_state.h"
29 #include "pipe/p_defines.h"
30 #include "util/u_inlines.h"
31 #include "os/os_thread.h"
32 #include "os/os_time.h"
33 #include "util/u_math.h"
34 #include "util/u_memory.h"
35 #include "util/u_resource.h"
37 #include "svga_context.h"
38 #include "svga_screen.h"
39 #include "svga_resource_buffer.h"
40 #include "svga_resource_buffer_upload.h"
41 #include "svga_winsys.h"
42 #include "svga_debug.h"
46 * Vertex and index buffers need hardware backing. Constant buffers
47 * do not. No other types of buffers currently supported.
50 svga_buffer_needs_hw_storage(unsigned usage
)
52 return (usage
& (PIPE_BIND_VERTEX_BUFFER
| PIPE_BIND_INDEX_BUFFER
|
53 PIPE_BIND_SAMPLER_VIEW
| PIPE_BIND_STREAM_OUTPUT
)) != 0;
58 * Create a buffer transfer.
60 * Unlike texture DMAs (which are written immediately to the command buffer and
61 * therefore inherently serialized with other context operations), for buffers
62 * we try to coalesce multiple range mappings (i.e, multiple calls to this
63 * function) into a single DMA command, for better efficiency in command
64 * processing. This means we need to exercise extra care here to ensure that
65 * the end result is exactly the same as if one DMA was used for every mapped
69 svga_buffer_transfer_map(struct pipe_context
*pipe
,
70 struct pipe_resource
*resource
,
73 const struct pipe_box
*box
,
74 struct pipe_transfer
**ptransfer
)
76 struct svga_context
*svga
= svga_context(pipe
);
77 struct svga_screen
*ss
= svga_screen(pipe
->screen
);
78 struct svga_buffer
*sbuf
= svga_buffer(resource
);
79 struct pipe_transfer
*transfer
;
81 int64_t begin
= os_time_get();
83 transfer
= CALLOC_STRUCT(pipe_transfer
);
84 if (transfer
== NULL
) {
88 transfer
->resource
= resource
;
89 transfer
->level
= level
;
90 transfer
->usage
= usage
;
93 if ((usage
& PIPE_TRANSFER_READ
) && sbuf
->dirty
) {
94 /* Only need to test for vgpu10 since only vgpu10 features (streamout,
95 * buffer copy) can modify buffers on the device.
97 if (svga_have_vgpu10(svga
)) {
100 ret
= SVGA3D_vgpu10_ReadbackSubResource(svga
->swc
, sbuf
->handle
, 0);
101 if (ret
!= PIPE_OK
) {
102 svga_context_flush(svga
, NULL
);
103 ret
= SVGA3D_vgpu10_ReadbackSubResource(svga
->swc
, sbuf
->handle
, 0);
104 assert(ret
== PIPE_OK
);
107 svga_context_finish(svga
);
113 if (usage
& PIPE_TRANSFER_WRITE
) {
114 if (usage
& PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE
) {
116 * Flush any pending primitives, finish writing any pending DMA
117 * commands, and tell the host to discard the buffer contents on
118 * the next DMA operation.
121 svga_hwtnl_flush_buffer(svga
, resource
);
123 if (sbuf
->dma
.pending
) {
124 svga_buffer_upload_flush(svga
, sbuf
);
127 * Instead of flushing the context command buffer, simply discard
128 * the current hwbuf, and start a new one.
129 * With GB objects, the map operation takes care of this
130 * if passed the PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE flag,
131 * and the old backing store is busy.
134 if (!svga_have_gb_objects(svga
))
135 svga_buffer_destroy_hw_storage(ss
, sbuf
);
138 sbuf
->map
.num_ranges
= 0;
139 sbuf
->dma
.flags
.discard
= TRUE
;
142 if (usage
& PIPE_TRANSFER_UNSYNCHRONIZED
) {
143 if (!sbuf
->map
.num_ranges
) {
145 * No pending ranges to upload so far, so we can tell the host to
146 * not synchronize on the next DMA command.
149 sbuf
->dma
.flags
.unsynchronized
= TRUE
;
153 * Synchronizing, so flush any pending primitives, finish writing any
154 * pending DMA command, and ensure the next DMA will be done in order.
157 svga_hwtnl_flush_buffer(svga
, resource
);
159 if (sbuf
->dma
.pending
) {
160 svga_buffer_upload_flush(svga
, sbuf
);
162 if (svga_buffer_has_hw_storage(sbuf
)) {
164 * We have a pending DMA upload from a hardware buffer, therefore
165 * we need to ensure that the host finishes processing that DMA
166 * command before the state tracker can start overwriting the
169 * XXX: This could be avoided by tying the hardware buffer to
170 * the transfer (just as done with textures), which would allow
171 * overlapping DMAs commands to be queued on the same context
172 * buffer. However, due to the likelihood of software vertex
173 * processing, it is more convenient to hold on to the hardware
174 * buffer, allowing to quickly access the contents from the CPU
175 * without having to do a DMA download from the host.
178 if (usage
& PIPE_TRANSFER_DONTBLOCK
) {
180 * Flushing the command buffer here will most likely cause
181 * the map of the hwbuf below to block, so preemptively
182 * return NULL here if DONTBLOCK is set to prevent unnecessary
183 * command buffer flushes.
190 svga_context_flush(svga
, NULL
);
194 sbuf
->dma
.flags
.unsynchronized
= FALSE
;
198 if (!sbuf
->swbuf
&& !svga_buffer_has_hw_storage(sbuf
)) {
199 if (svga_buffer_create_hw_storage(ss
, sbuf
) != PIPE_OK
) {
201 * We can't create a hardware buffer big enough, so create a malloc
205 debug_printf("%s: failed to allocate %u KB of DMA, "
206 "splitting DMA transfers\n",
208 (sbuf
->b
.b
.width0
+ 1023)/1024);
211 sbuf
->swbuf
= align_malloc(sbuf
->b
.b
.width0
, 16);
220 /* User/malloc buffer */
223 else if (svga_buffer_has_hw_storage(sbuf
)) {
226 map
= svga_buffer_hw_storage_map(svga
, sbuf
, transfer
->usage
, &retry
);
227 if (map
== NULL
&& retry
) {
229 * At this point, svga_buffer_get_transfer() has already
230 * hit the DISCARD_WHOLE_RESOURCE path and flushed HWTNL
233 svga_context_flush(svga
, NULL
);
234 map
= svga_buffer_hw_storage_map(svga
, sbuf
, transfer
->usage
, &retry
);
243 map
+= transfer
->box
.x
;
244 *ptransfer
= transfer
;
249 svga
->hud
.map_buffer_time
+= (os_time_get() - begin
);
256 svga_buffer_transfer_flush_region( struct pipe_context
*pipe
,
257 struct pipe_transfer
*transfer
,
258 const struct pipe_box
*box
)
260 struct svga_screen
*ss
= svga_screen(pipe
->screen
);
261 struct svga_buffer
*sbuf
= svga_buffer(transfer
->resource
);
263 unsigned offset
= transfer
->box
.x
+ box
->x
;
264 unsigned length
= box
->width
;
266 assert(transfer
->usage
& PIPE_TRANSFER_WRITE
);
267 assert(transfer
->usage
& PIPE_TRANSFER_FLUSH_EXPLICIT
);
269 pipe_mutex_lock(ss
->swc_mutex
);
270 svga_buffer_add_range(sbuf
, offset
, offset
+ length
);
271 pipe_mutex_unlock(ss
->swc_mutex
);
276 svga_buffer_transfer_unmap( struct pipe_context
*pipe
,
277 struct pipe_transfer
*transfer
)
279 struct svga_screen
*ss
= svga_screen(pipe
->screen
);
280 struct svga_context
*svga
= svga_context(pipe
);
281 struct svga_buffer
*sbuf
= svga_buffer(transfer
->resource
);
283 pipe_mutex_lock(ss
->swc_mutex
);
285 assert(sbuf
->map
.count
);
286 if (sbuf
->map
.count
) {
290 if (svga_buffer_has_hw_storage(sbuf
)) {
291 svga_buffer_hw_storage_unmap(svga
, sbuf
);
294 if (transfer
->usage
& PIPE_TRANSFER_WRITE
) {
295 if (!(transfer
->usage
& PIPE_TRANSFER_FLUSH_EXPLICIT
)) {
297 * Mapped range not flushed explicitly, so flush the whole buffer,
298 * and tell the host to discard the contents when processing the DMA
302 SVGA_DBG(DEBUG_DMA
, "flushing the whole buffer\n");
304 sbuf
->dma
.flags
.discard
= TRUE
;
306 svga_buffer_add_range(sbuf
, 0, sbuf
->b
.b
.width0
);
310 pipe_mutex_unlock(ss
->swc_mutex
);
316 svga_buffer_destroy( struct pipe_screen
*screen
,
317 struct pipe_resource
*buf
)
319 struct svga_screen
*ss
= svga_screen(screen
);
320 struct svga_buffer
*sbuf
= svga_buffer( buf
);
322 assert(!p_atomic_read(&buf
->reference
.count
));
324 assert(!sbuf
->dma
.pending
);
327 svga_buffer_destroy_host_surface(ss
, sbuf
);
329 if (sbuf
->uploaded
.buffer
)
330 pipe_resource_reference(&sbuf
->uploaded
.buffer
, NULL
);
333 svga_buffer_destroy_hw_storage(ss
, sbuf
);
335 if (sbuf
->swbuf
&& !sbuf
->user
)
336 align_free(sbuf
->swbuf
);
338 ss
->hud
.total_resource_bytes
-= sbuf
->size
;
339 assert(ss
->hud
.num_resources
> 0);
340 if (ss
->hud
.num_resources
> 0)
341 ss
->hud
.num_resources
--;
347 struct u_resource_vtbl svga_buffer_vtbl
=
349 u_default_resource_get_handle
, /* get_handle */
350 svga_buffer_destroy
, /* resource_destroy */
351 svga_buffer_transfer_map
, /* transfer_map */
352 svga_buffer_transfer_flush_region
, /* transfer_flush_region */
353 svga_buffer_transfer_unmap
, /* transfer_unmap */
354 u_default_transfer_inline_write
/* transfer_inline_write */
359 struct pipe_resource
*
360 svga_buffer_create(struct pipe_screen
*screen
,
361 const struct pipe_resource
*template)
363 struct svga_screen
*ss
= svga_screen(screen
);
364 struct svga_buffer
*sbuf
;
366 sbuf
= CALLOC_STRUCT(svga_buffer
);
370 sbuf
->b
.b
= *template;
371 sbuf
->b
.vtbl
= &svga_buffer_vtbl
;
372 pipe_reference_init(&sbuf
->b
.b
.reference
, 1);
373 sbuf
->b
.b
.screen
= screen
;
374 sbuf
->bind_flags
= template->bind
;
376 if (template->bind
& PIPE_BIND_CONSTANT_BUFFER
) {
377 /* Constant buffers can only have the PIPE_BIND_CONSTANT_BUFFER
380 if (ss
->sws
->have_vgpu10
) {
381 sbuf
->bind_flags
= PIPE_BIND_CONSTANT_BUFFER
;
383 /* Constant buffer size needs to be in multiples of 16. */
384 sbuf
->b
.b
.width0
= align(sbuf
->b
.b
.width0
, 16);
388 if (svga_buffer_needs_hw_storage(template->bind
)) {
390 /* If the buffer will be used for vertex/index/stream data, set all
391 * the flags so that the buffer will be accepted for all those uses.
392 * Note that the PIPE_BIND_ flags we get from the state tracker are
393 * just a hint about how the buffer may be used. And OpenGL buffer
394 * object may be used for many different things.
396 if (!(template->bind
& PIPE_BIND_CONSTANT_BUFFER
)) {
397 /* Not a constant buffer. The buffer may be used for vertex data,
398 * indexes or stream-out.
400 sbuf
->bind_flags
|= (PIPE_BIND_VERTEX_BUFFER
|
401 PIPE_BIND_INDEX_BUFFER
);
402 if (ss
->sws
->have_vgpu10
)
403 sbuf
->bind_flags
|= PIPE_BIND_STREAM_OUTPUT
;
406 if (svga_buffer_create_host_surface(ss
, sbuf
) != PIPE_OK
)
410 sbuf
->swbuf
= align_malloc(sbuf
->b
.b
.width0
, 64);
415 debug_reference(&sbuf
->b
.b
.reference
,
416 (debug_reference_descriptor
)debug_describe_resource
, 0);
418 sbuf
->size
= util_resource_size(&sbuf
->b
.b
);
419 ss
->hud
.total_resource_bytes
+= sbuf
->size
;
421 ss
->hud
.num_resources
++;
432 struct pipe_resource
*
433 svga_user_buffer_create(struct pipe_screen
*screen
,
438 struct svga_buffer
*sbuf
;
439 struct svga_screen
*ss
= svga_screen(screen
);
441 sbuf
= CALLOC_STRUCT(svga_buffer
);
445 pipe_reference_init(&sbuf
->b
.b
.reference
, 1);
446 sbuf
->b
.vtbl
= &svga_buffer_vtbl
;
447 sbuf
->b
.b
.screen
= screen
;
448 sbuf
->b
.b
.format
= PIPE_FORMAT_R8_UNORM
; /* ?? */
449 sbuf
->b
.b
.usage
= PIPE_USAGE_IMMUTABLE
;
450 sbuf
->b
.b
.bind
= bind
;
451 sbuf
->b
.b
.width0
= bytes
;
452 sbuf
->b
.b
.height0
= 1;
453 sbuf
->b
.b
.depth0
= 1;
454 sbuf
->b
.b
.array_size
= 1;
456 sbuf
->bind_flags
= bind
;
460 debug_reference(&sbuf
->b
.b
.reference
,
461 (debug_reference_descriptor
)debug_describe_resource
, 0);
463 ss
->hud
.num_resources
++;