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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
|
/*
* xen paravirt framebuffer backend
*
* Copyright IBM, Corp. 2005-2006
* Copyright Red Hat, Inc. 2006-2008
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>,
* Markus Armbruster <armbru@redhat.com>,
* Daniel P. Berrange <berrange@redhat.com>,
* Pat Campbell <plc@novell.com>,
* Gerd Hoffmann <kraxel@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; under version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <stdarg.h>
#include <stdlib.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include "hw/hw.h"
#include "ui/console.h"
#include "sysemu/char.h"
#include "hw/xen/xen_backend.h"
#include <xen/event_channel.h>
#include <xen/io/fbif.h>
#include <xen/io/kbdif.h>
#include <xen/io/protocols.h>
#ifndef BTN_LEFT
#define BTN_LEFT 0x110 /* from <linux/input.h> */
#endif
/* -------------------------------------------------------------------- */
struct common {
struct XenDevice xendev; /* must be first */
void *page;
QemuConsole *con;
};
struct XenInput {
struct common c;
int abs_pointer_wanted; /* Whether guest supports absolute pointer */
int button_state; /* Last seen pointer button state */
int extended;
QEMUPutMouseEntry *qmouse;
};
#define UP_QUEUE 8
struct XenFB {
struct common c;
size_t fb_len;
int row_stride;
int depth;
int width;
int height;
int offset;
void *pixels;
int fbpages;
int feature_update;
int refresh_period;
int bug_trigger;
int have_console;
int do_resize;
struct {
int x,y,w,h;
} up_rects[UP_QUEUE];
int up_count;
int up_fullscreen;
};
/* -------------------------------------------------------------------- */
static int common_bind(struct common *c)
{
int mfn;
if (xenstore_read_fe_int(&c->xendev, "page-ref", &mfn) == -1)
return -1;
if (xenstore_read_fe_int(&c->xendev, "event-channel", &c->xendev.remote_port) == -1)
return -1;
c->page = xc_map_foreign_range(xen_xc, c->xendev.dom,
XC_PAGE_SIZE,
PROT_READ | PROT_WRITE, mfn);
if (c->page == NULL)
return -1;
xen_be_bind_evtchn(&c->xendev);
xen_be_printf(&c->xendev, 1, "ring mfn %d, remote-port %d, local-port %d\n",
mfn, c->xendev.remote_port, c->xendev.local_port);
return 0;
}
static void common_unbind(struct common *c)
{
xen_be_unbind_evtchn(&c->xendev);
if (c->page) {
munmap(c->page, XC_PAGE_SIZE);
c->page = NULL;
}
}
/* -------------------------------------------------------------------- */
#if 0
/*
* These two tables are not needed any more, but left in here
* intentionally as documentation, to show how scancode2linux[]
* was generated.
*
* Tables to map from scancode to Linux input layer keycode.
* Scancodes are hardware-specific. These maps assumes a
* standard AT or PS/2 keyboard which is what QEMU feeds us.
*/
const unsigned char atkbd_set2_keycode[512] = {
0, 67, 65, 63, 61, 59, 60, 88, 0, 68, 66, 64, 62, 15, 41,117,
0, 56, 42, 93, 29, 16, 2, 0, 0, 0, 44, 31, 30, 17, 3, 0,
0, 46, 45, 32, 18, 5, 4, 95, 0, 57, 47, 33, 20, 19, 6,183,
0, 49, 48, 35, 34, 21, 7,184, 0, 0, 50, 36, 22, 8, 9,185,
0, 51, 37, 23, 24, 11, 10, 0, 0, 52, 53, 38, 39, 25, 12, 0,
0, 89, 40, 0, 26, 13, 0, 0, 58, 54, 28, 27, 0, 43, 0, 85,
0, 86, 91, 90, 92, 0, 14, 94, 0, 79,124, 75, 71,121, 0, 0,
82, 83, 80, 76, 77, 72, 1, 69, 87, 78, 81, 74, 55, 73, 70, 99,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
217,100,255, 0, 97,165, 0, 0,156, 0, 0, 0, 0, 0, 0,125,
173,114, 0,113, 0, 0, 0,126,128, 0, 0,140, 0, 0, 0,127,
159, 0,115, 0,164, 0, 0,116,158, 0,150,166, 0, 0, 0,142,
157, 0, 0, 0, 0, 0, 0, 0,155, 0, 98, 0, 0,163, 0, 0,
226, 0, 0, 0, 0, 0, 0, 0, 0,255, 96, 0, 0, 0,143, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0,107, 0,105,102, 0, 0,112,
110,111,108,112,106,103, 0,119, 0,118,109, 0, 99,104,119, 0,
};
const unsigned char atkbd_unxlate_table[128] = {
0,118, 22, 30, 38, 37, 46, 54, 61, 62, 70, 69, 78, 85,102, 13,
21, 29, 36, 45, 44, 53, 60, 67, 68, 77, 84, 91, 90, 20, 28, 27,
35, 43, 52, 51, 59, 66, 75, 76, 82, 14, 18, 93, 26, 34, 33, 42,
50, 49, 58, 65, 73, 74, 89,124, 17, 41, 88, 5, 6, 4, 12, 3,
11, 2, 10, 1, 9,119,126,108,117,125,123,107,115,116,121,105,
114,122,112,113,127, 96, 97,120, 7, 15, 23, 31, 39, 47, 55, 63,
71, 79, 86, 94, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 87,111,
19, 25, 57, 81, 83, 92, 95, 98, 99,100,101,103,104,106,109,110
};
#endif
/*
* for (i = 0; i < 128; i++) {
* scancode2linux[i] = atkbd_set2_keycode[atkbd_unxlate_table[i]];
* scancode2linux[i | 0x80] = atkbd_set2_keycode[atkbd_unxlate_table[i] | 0x80];
* }
*/
static const unsigned char scancode2linux[512] = {
0, 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, 99, 0, 86, 87, 88,117, 0, 0, 95,183,184,185,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
93, 0, 0, 89, 0, 0, 85, 91, 90, 92, 0, 94, 0,124,121, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
165, 0, 0, 0, 0, 0, 0, 0, 0,163, 0, 0, 96, 97, 0, 0,
113,140,164, 0,166, 0, 0, 0, 0, 0,255, 0, 0, 0,114, 0,
115, 0,150, 0, 0, 98,255, 99,100, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0,119,119,102,103,104, 0,105,112,106,118,107,
108,109,110,111, 0, 0, 0, 0, 0, 0, 0,125,126,127,116,142,
0, 0, 0,143, 0,217,156,173,128,159,158,157,155,226, 0,112,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};
/* Send an event to the keyboard frontend driver */
static int xenfb_kbd_event(struct XenInput *xenfb,
union xenkbd_in_event *event)
{
struct xenkbd_page *page = xenfb->c.page;
uint32_t prod;
if (xenfb->c.xendev.be_state != XenbusStateConnected)
return 0;
if (!page)
return 0;
prod = page->in_prod;
if (prod - page->in_cons == XENKBD_IN_RING_LEN) {
errno = EAGAIN;
return -1;
}
xen_mb(); /* ensure ring space available */
XENKBD_IN_RING_REF(page, prod) = *event;
xen_wmb(); /* ensure ring contents visible */
page->in_prod = prod + 1;
return xen_be_send_notify(&xenfb->c.xendev);
}
/* Send a keyboard (or mouse button) event */
static int xenfb_send_key(struct XenInput *xenfb, bool down, int keycode)
{
union xenkbd_in_event event;
memset(&event, 0, XENKBD_IN_EVENT_SIZE);
event.type = XENKBD_TYPE_KEY;
event.key.pressed = down ? 1 : 0;
event.key.keycode = keycode;
return xenfb_kbd_event(xenfb, &event);
}
/* Send a relative mouse movement event */
static int xenfb_send_motion(struct XenInput *xenfb,
int rel_x, int rel_y, int rel_z)
{
union xenkbd_in_event event;
memset(&event, 0, XENKBD_IN_EVENT_SIZE);
event.type = XENKBD_TYPE_MOTION;
event.motion.rel_x = rel_x;
event.motion.rel_y = rel_y;
#if __XEN_LATEST_INTERFACE_VERSION__ >= 0x00030207
event.motion.rel_z = rel_z;
#endif
return xenfb_kbd_event(xenfb, &event);
}
/* Send an absolute mouse movement event */
static int xenfb_send_position(struct XenInput *xenfb,
int abs_x, int abs_y, int z)
{
union xenkbd_in_event event;
memset(&event, 0, XENKBD_IN_EVENT_SIZE);
event.type = XENKBD_TYPE_POS;
event.pos.abs_x = abs_x;
event.pos.abs_y = abs_y;
#if __XEN_LATEST_INTERFACE_VERSION__ == 0x00030207
event.pos.abs_z = z;
#endif
#if __XEN_LATEST_INTERFACE_VERSION__ >= 0x00030208
event.pos.rel_z = z;
#endif
return xenfb_kbd_event(xenfb, &event);
}
/*
* Send a key event from the client to the guest OS
* QEMU gives us a raw scancode from an AT / PS/2 style keyboard.
* We have to turn this into a Linux Input layer keycode.
*
* Extra complexity from the fact that with extended scancodes
* (like those produced by arrow keys) this method gets called
* twice, but we only want to send a single event. So we have to
* track the '0xe0' scancode state & collapse the extended keys
* as needed.
*
* Wish we could just send scancodes straight to the guest which
* already has code for dealing with this...
*/
static void xenfb_key_event(void *opaque, int scancode)
{
struct XenInput *xenfb = opaque;
int down = 1;
if (scancode == 0xe0) {
xenfb->extended = 1;
return;
} else if (scancode & 0x80) {
scancode &= 0x7f;
down = 0;
}
if (xenfb->extended) {
scancode |= 0x80;
xenfb->extended = 0;
}
xenfb_send_key(xenfb, down, scancode2linux[scancode]);
}
/*
* Send a mouse event from the client to the guest OS
*
* The QEMU mouse can be in either relative, or absolute mode.
* Movement is sent separately from button state, which has to
* be encoded as virtual key events. We also don't actually get
* given any button up/down events, so have to track changes in
* the button state.
*/
static void xenfb_mouse_event(void *opaque,
int dx, int dy, int dz, int button_state)
{
struct XenInput *xenfb = opaque;
DisplaySurface *surface = qemu_console_surface(xenfb->c.con);
int dw = surface_width(surface);
int dh = surface_height(surface);
int i;
if (xenfb->abs_pointer_wanted)
xenfb_send_position(xenfb,
dx * (dw - 1) / 0x7fff,
dy * (dh - 1) / 0x7fff,
dz);
else
xenfb_send_motion(xenfb, dx, dy, dz);
for (i = 0 ; i < 8 ; i++) {
int lastDown = xenfb->button_state & (1 << i);
int down = button_state & (1 << i);
if (down == lastDown)
continue;
if (xenfb_send_key(xenfb, down, BTN_LEFT+i) < 0)
return;
}
xenfb->button_state = button_state;
}
static int input_init(struct XenDevice *xendev)
{
xenstore_write_be_int(xendev, "feature-abs-pointer", 1);
return 0;
}
static int input_initialise(struct XenDevice *xendev)
{
struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
int rc;
if (!in->c.con) {
xen_be_printf(xendev, 1, "ds not set (yet)\n");
return -1;
}
rc = common_bind(&in->c);
if (rc != 0)
return rc;
qemu_add_kbd_event_handler(xenfb_key_event, in);
return 0;
}
static void input_connected(struct XenDevice *xendev)
{
struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
if (xenstore_read_fe_int(xendev, "request-abs-pointer",
&in->abs_pointer_wanted) == -1) {
in->abs_pointer_wanted = 0;
}
if (in->qmouse) {
qemu_remove_mouse_event_handler(in->qmouse);
}
in->qmouse = qemu_add_mouse_event_handler(xenfb_mouse_event, in,
in->abs_pointer_wanted,
"Xen PVFB Mouse");
}
static void input_disconnect(struct XenDevice *xendev)
{
struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
if (in->qmouse) {
qemu_remove_mouse_event_handler(in->qmouse);
in->qmouse = NULL;
}
qemu_add_kbd_event_handler(NULL, NULL);
common_unbind(&in->c);
}
static void input_event(struct XenDevice *xendev)
{
struct XenInput *xenfb = container_of(xendev, struct XenInput, c.xendev);
struct xenkbd_page *page = xenfb->c.page;
/* We don't understand any keyboard events, so just ignore them. */
if (page->out_prod == page->out_cons)
return;
page->out_cons = page->out_prod;
xen_be_send_notify(&xenfb->c.xendev);
}
/* -------------------------------------------------------------------- */
static void xenfb_copy_mfns(int mode, int count, unsigned long *dst, void *src)
{
uint32_t *src32 = src;
uint64_t *src64 = src;
int i;
for (i = 0; i < count; i++)
dst[i] = (mode == 32) ? src32[i] : src64[i];
}
static int xenfb_map_fb(struct XenFB *xenfb)
{
struct xenfb_page *page = xenfb->c.page;
char *protocol = xenfb->c.xendev.protocol;
int n_fbdirs;
unsigned long *pgmfns = NULL;
unsigned long *fbmfns = NULL;
void *map, *pd;
int mode, ret = -1;
/* default to native */
pd = page->pd;
mode = sizeof(unsigned long) * 8;
if (!protocol) {
/*
* Undefined protocol, some guesswork needed.
*
* Old frontends which don't set the protocol use
* one page directory only, thus pd[1] must be zero.
* pd[1] of the 32bit struct layout and the lower
* 32 bits of pd[0] of the 64bit struct layout have
* the same location, so we can check that ...
*/
uint32_t *ptr32 = NULL;
uint32_t *ptr64 = NULL;
#if defined(__i386__)
ptr32 = (void*)page->pd;
ptr64 = ((void*)page->pd) + 4;
#elif defined(__x86_64__)
ptr32 = ((void*)page->pd) - 4;
ptr64 = (void*)page->pd;
#endif
if (ptr32) {
if (ptr32[1] == 0) {
mode = 32;
pd = ptr32;
} else {
mode = 64;
pd = ptr64;
}
}
#if defined(__x86_64__)
} else if (strcmp(protocol, XEN_IO_PROTO_ABI_X86_32) == 0) {
/* 64bit dom0, 32bit domU */
mode = 32;
pd = ((void*)page->pd) - 4;
#elif defined(__i386__)
} else if (strcmp(protocol, XEN_IO_PROTO_ABI_X86_64) == 0) {
/* 32bit dom0, 64bit domU */
mode = 64;
pd = ((void*)page->pd) + 4;
#endif
}
if (xenfb->pixels) {
munmap(xenfb->pixels, xenfb->fbpages * XC_PAGE_SIZE);
xenfb->pixels = NULL;
}
xenfb->fbpages = (xenfb->fb_len + (XC_PAGE_SIZE - 1)) / XC_PAGE_SIZE;
n_fbdirs = xenfb->fbpages * mode / 8;
n_fbdirs = (n_fbdirs + (XC_PAGE_SIZE - 1)) / XC_PAGE_SIZE;
pgmfns = g_malloc0(sizeof(unsigned long) * n_fbdirs);
fbmfns = g_malloc0(sizeof(unsigned long) * xenfb->fbpages);
xenfb_copy_mfns(mode, n_fbdirs, pgmfns, pd);
map = xc_map_foreign_pages(xen_xc, xenfb->c.xendev.dom,
PROT_READ, pgmfns, n_fbdirs);
if (map == NULL)
goto out;
xenfb_copy_mfns(mode, xenfb->fbpages, fbmfns, map);
munmap(map, n_fbdirs * XC_PAGE_SIZE);
xenfb->pixels = xc_map_foreign_pages(xen_xc, xenfb->c.xendev.dom,
PROT_READ | PROT_WRITE, fbmfns, xenfb->fbpages);
if (xenfb->pixels == NULL)
goto out;
ret = 0; /* all is fine */
out:
g_free(pgmfns);
g_free(fbmfns);
return ret;
}
static int xenfb_configure_fb(struct XenFB *xenfb, size_t fb_len_lim,
int width, int height, int depth,
size_t fb_len, int offset, int row_stride)
{
size_t mfn_sz = sizeof(*((struct xenfb_page *)0)->pd);
size_t pd_len = sizeof(((struct xenfb_page *)0)->pd) / mfn_sz;
size_t fb_pages = pd_len * XC_PAGE_SIZE / mfn_sz;
size_t fb_len_max = fb_pages * XC_PAGE_SIZE;
int max_width, max_height;
if (fb_len_lim > fb_len_max) {
xen_be_printf(&xenfb->c.xendev, 0, "fb size limit %zu exceeds %zu, corrected\n",
fb_len_lim, fb_len_max);
fb_len_lim = fb_len_max;
}
if (fb_len_lim && fb_len > fb_len_lim) {
xen_be_printf(&xenfb->c.xendev, 0, "frontend fb size %zu limited to %zu\n",
fb_len, fb_len_lim);
fb_len = fb_len_lim;
}
if (depth != 8 && depth != 16 && depth != 24 && depth != 32) {
xen_be_printf(&xenfb->c.xendev, 0, "can't handle frontend fb depth %d\n",
depth);
return -1;
}
if (row_stride <= 0 || row_stride > fb_len) {
xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend stride %d\n", row_stride);
return -1;
}
max_width = row_stride / (depth / 8);
if (width < 0 || width > max_width) {
xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend width %d limited to %d\n",
width, max_width);
width = max_width;
}
if (offset < 0 || offset >= fb_len) {
xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend offset %d (max %zu)\n",
offset, fb_len - 1);
return -1;
}
max_height = (fb_len - offset) / row_stride;
if (height < 0 || height > max_height) {
xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend height %d limited to %d\n",
height, max_height);
height = max_height;
}
xenfb->fb_len = fb_len;
xenfb->row_stride = row_stride;
xenfb->depth = depth;
xenfb->width = width;
xenfb->height = height;
xenfb->offset = offset;
xenfb->up_fullscreen = 1;
xenfb->do_resize = 1;
xen_be_printf(&xenfb->c.xendev, 1, "framebuffer %dx%dx%d offset %d stride %d\n",
width, height, depth, offset, row_stride);
return 0;
}
/* A convenient function for munging pixels between different depths */
#define BLT(SRC_T,DST_T,RSB,GSB,BSB,RDB,GDB,BDB) \
for (line = y ; line < (y+h) ; line++) { \
SRC_T *src = (SRC_T *)(xenfb->pixels \
+ xenfb->offset \
+ (line * xenfb->row_stride) \
+ (x * xenfb->depth / 8)); \
DST_T *dst = (DST_T *)(data \
+ (line * linesize) \
+ (x * bpp / 8)); \
int col; \
const int RSS = 32 - (RSB + GSB + BSB); \
const int GSS = 32 - (GSB + BSB); \
const int BSS = 32 - (BSB); \
const uint32_t RSM = (~0U) << (32 - RSB); \
const uint32_t GSM = (~0U) << (32 - GSB); \
const uint32_t BSM = (~0U) << (32 - BSB); \
const int RDS = 32 - (RDB + GDB + BDB); \
const int GDS = 32 - (GDB + BDB); \
const int BDS = 32 - (BDB); \
const uint32_t RDM = (~0U) << (32 - RDB); \
const uint32_t GDM = (~0U) << (32 - GDB); \
const uint32_t BDM = (~0U) << (32 - BDB); \
for (col = x ; col < (x+w) ; col++) { \
uint32_t spix = *src; \
*dst = (((spix << RSS) & RSM & RDM) >> RDS) | \
(((spix << GSS) & GSM & GDM) >> GDS) | \
(((spix << BSS) & BSM & BDM) >> BDS); \
src = (SRC_T *) ((unsigned long) src + xenfb->depth / 8); \
dst = (DST_T *) ((unsigned long) dst + bpp / 8); \
} \
}
/*
* This copies data from the guest framebuffer region, into QEMU's
* displaysurface. qemu uses 16 or 32 bpp. In case the pv framebuffer
* uses something else we must convert and copy, otherwise we can
* supply the buffer directly and no thing here.
*/
static void xenfb_guest_copy(struct XenFB *xenfb, int x, int y, int w, int h)
{
DisplaySurface *surface = qemu_console_surface(xenfb->c.con);
int line, oops = 0;
int bpp = surface_bits_per_pixel(surface);
int linesize = surface_stride(surface);
uint8_t *data = surface_data(surface);
if (!is_buffer_shared(surface)) {
switch (xenfb->depth) {
case 8:
if (bpp == 16) {
BLT(uint8_t, uint16_t, 3, 3, 2, 5, 6, 5);
} else if (bpp == 32) {
BLT(uint8_t, uint32_t, 3, 3, 2, 8, 8, 8);
} else {
oops = 1;
}
break;
case 24:
if (bpp == 16) {
BLT(uint32_t, uint16_t, 8, 8, 8, 5, 6, 5);
} else if (bpp == 32) {
BLT(uint32_t, uint32_t, 8, 8, 8, 8, 8, 8);
} else {
oops = 1;
}
break;
default:
oops = 1;
}
}
if (oops) /* should not happen */
xen_be_printf(&xenfb->c.xendev, 0, "%s: oops: convert %d -> %d bpp?\n",
__FUNCTION__, xenfb->depth, bpp);
dpy_gfx_update(xenfb->c.con, x, y, w, h);
}
#if 0 /* def XENFB_TYPE_REFRESH_PERIOD */
static int xenfb_queue_full(struct XenFB *xenfb)
{
struct xenfb_page *page = xenfb->c.page;
uint32_t cons, prod;
if (!page)
return 1;
prod = page->in_prod;
cons = page->in_cons;
return prod - cons == XENFB_IN_RING_LEN;
}
static void xenfb_send_event(struct XenFB *xenfb, union xenfb_in_event *event)
{
uint32_t prod;
struct xenfb_page *page = xenfb->c.page;
prod = page->in_prod;
/* caller ensures !xenfb_queue_full() */
xen_mb(); /* ensure ring space available */
XENFB_IN_RING_REF(page, prod) = *event;
xen_wmb(); /* ensure ring contents visible */
page->in_prod = prod + 1;
xen_be_send_notify(&xenfb->c.xendev);
}
static void xenfb_send_refresh_period(struct XenFB *xenfb, int period)
{
union xenfb_in_event event;
memset(&event, 0, sizeof(event));
event.type = XENFB_TYPE_REFRESH_PERIOD;
event.refresh_period.period = period;
xenfb_send_event(xenfb, &event);
}
#endif
/*
* Periodic update of display.
* Also transmit the refresh interval to the frontend.
*
* Never ever do any qemu display operations
* (resize, screen update) outside this function.
* Our screen might be inactive. When asked for
* an update we know it is active.
*/
static void xenfb_update(void *opaque)
{
struct XenFB *xenfb = opaque;
DisplaySurface *surface;
int i;
if (xenfb->c.xendev.be_state != XenbusStateConnected)
return;
if (xenfb->feature_update) {
#if 0 /* XENFB_TYPE_REFRESH_PERIOD */
struct DisplayChangeListener *l;
int period = 99999999;
int idle = 1;
if (xenfb_queue_full(xenfb))
return;
QLIST_FOREACH(l, &xenfb->c.ds->listeners, next) {
if (l->idle)
continue;
idle = 0;
if (!l->gui_timer_interval) {
if (period > GUI_REFRESH_INTERVAL)
period = GUI_REFRESH_INTERVAL;
} else {
if (period > l->gui_timer_interval)
period = l->gui_timer_interval;
}
}
if (idle)
period = XENFB_NO_REFRESH;
if (xenfb->refresh_period != period) {
xenfb_send_refresh_period(xenfb, period);
xenfb->refresh_period = period;
xen_be_printf(&xenfb->c.xendev, 1, "refresh period: %d\n", period);
}
#else
; /* nothing */
#endif
} else {
/* we don't get update notifications, thus use the
* sledge hammer approach ... */
xenfb->up_fullscreen = 1;
}
/* resize if needed */
if (xenfb->do_resize) {
xenfb->do_resize = 0;
switch (xenfb->depth) {
case 16:
case 32:
/* console.c supported depth -> buffer can be used directly */
surface = qemu_create_displaysurface_from
(xenfb->width, xenfb->height, xenfb->depth,
xenfb->row_stride, xenfb->pixels + xenfb->offset,
false);
break;
default:
/* we must convert stuff */
surface = qemu_create_displaysurface(xenfb->width, xenfb->height);
break;
}
dpy_gfx_replace_surface(xenfb->c.con, surface);
xen_be_printf(&xenfb->c.xendev, 1, "update: resizing: %dx%d @ %d bpp%s\n",
xenfb->width, xenfb->height, xenfb->depth,
is_buffer_shared(surface) ? " (shared)" : "");
xenfb->up_fullscreen = 1;
}
/* run queued updates */
if (xenfb->up_fullscreen) {
xen_be_printf(&xenfb->c.xendev, 3, "update: fullscreen\n");
xenfb_guest_copy(xenfb, 0, 0, xenfb->width, xenfb->height);
} else if (xenfb->up_count) {
xen_be_printf(&xenfb->c.xendev, 3, "update: %d rects\n", xenfb->up_count);
for (i = 0; i < xenfb->up_count; i++)
xenfb_guest_copy(xenfb,
xenfb->up_rects[i].x,
xenfb->up_rects[i].y,
xenfb->up_rects[i].w,
xenfb->up_rects[i].h);
} else {
xen_be_printf(&xenfb->c.xendev, 3, "update: nothing\n");
}
xenfb->up_count = 0;
xenfb->up_fullscreen = 0;
}
/* QEMU display state changed, so refresh the framebuffer copy */
static void xenfb_invalidate(void *opaque)
{
struct XenFB *xenfb = opaque;
xenfb->up_fullscreen = 1;
}
static void xenfb_handle_events(struct XenFB *xenfb)
{
uint32_t prod, cons;
struct xenfb_page *page = xenfb->c.page;
prod = page->out_prod;
if (prod == page->out_cons)
return;
xen_rmb(); /* ensure we see ring contents up to prod */
for (cons = page->out_cons; cons != prod; cons++) {
union xenfb_out_event *event = &XENFB_OUT_RING_REF(page, cons);
int x, y, w, h;
switch (event->type) {
case XENFB_TYPE_UPDATE:
if (xenfb->up_count == UP_QUEUE)
xenfb->up_fullscreen = 1;
if (xenfb->up_fullscreen)
break;
x = MAX(event->update.x, 0);
y = MAX(event->update.y, 0);
w = MIN(event->update.width, xenfb->width - x);
h = MIN(event->update.height, xenfb->height - y);
if (w < 0 || h < 0) {
xen_be_printf(&xenfb->c.xendev, 1, "bogus update ignored\n");
break;
}
if (x != event->update.x ||
y != event->update.y ||
w != event->update.width ||
h != event->update.height) {
xen_be_printf(&xenfb->c.xendev, 1, "bogus update clipped\n");
}
if (w == xenfb->width && h > xenfb->height / 2) {
/* scroll detector: updated more than 50% of the lines,
* don't bother keeping track of the rectangles then */
xenfb->up_fullscreen = 1;
} else {
xenfb->up_rects[xenfb->up_count].x = x;
xenfb->up_rects[xenfb->up_count].y = y;
xenfb->up_rects[xenfb->up_count].w = w;
xenfb->up_rects[xenfb->up_count].h = h;
xenfb->up_count++;
}
break;
#ifdef XENFB_TYPE_RESIZE
case XENFB_TYPE_RESIZE:
if (xenfb_configure_fb(xenfb, xenfb->fb_len,
event->resize.width,
event->resize.height,
event->resize.depth,
xenfb->fb_len,
event->resize.offset,
event->resize.stride) < 0)
break;
xenfb_invalidate(xenfb);
break;
#endif
}
}
xen_mb(); /* ensure we're done with ring contents */
page->out_cons = cons;
}
static int fb_init(struct XenDevice *xendev)
{
struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
fb->refresh_period = -1;
#ifdef XENFB_TYPE_RESIZE
xenstore_write_be_int(xendev, "feature-resize", 1);
#endif
return 0;
}
static int fb_initialise(struct XenDevice *xendev)
{
struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
struct xenfb_page *fb_page;
int videoram;
int rc;
if (xenstore_read_fe_int(xendev, "videoram", &videoram) == -1)
videoram = 0;
rc = common_bind(&fb->c);
if (rc != 0)
return rc;
fb_page = fb->c.page;
rc = xenfb_configure_fb(fb, videoram * 1024 * 1024U,
fb_page->width, fb_page->height, fb_page->depth,
fb_page->mem_length, 0, fb_page->line_length);
if (rc != 0)
return rc;
rc = xenfb_map_fb(fb);
if (rc != 0)
return rc;
#if 0 /* handled in xen_init_display() for now */
if (!fb->have_console) {
fb->c.ds = graphic_console_init(xenfb_update,
xenfb_invalidate,
NULL,
NULL,
fb);
fb->have_console = 1;
}
#endif
if (xenstore_read_fe_int(xendev, "feature-update", &fb->feature_update) == -1)
fb->feature_update = 0;
if (fb->feature_update)
xenstore_write_be_int(xendev, "request-update", 1);
xen_be_printf(xendev, 1, "feature-update=%d, videoram=%d\n",
fb->feature_update, videoram);
return 0;
}
static void fb_disconnect(struct XenDevice *xendev)
{
struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
/*
* FIXME: qemu can't un-init gfx display (yet?).
* Replacing the framebuffer with anonymous shared memory
* instead. This releases the guest pages and keeps qemu happy.
*/
fb->pixels = mmap(fb->pixels, fb->fbpages * XC_PAGE_SIZE,
PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANON,
-1, 0);
common_unbind(&fb->c);
fb->feature_update = 0;
fb->bug_trigger = 0;
}
static void fb_frontend_changed(struct XenDevice *xendev, const char *node)
{
struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
/*
* Set state to Connected *again* once the frontend switched
* to connected. We must trigger the watch a second time to
* workaround a frontend bug.
*/
if (fb->bug_trigger == 0 && strcmp(node, "state") == 0 &&
xendev->fe_state == XenbusStateConnected &&
xendev->be_state == XenbusStateConnected) {
xen_be_printf(xendev, 2, "re-trigger connected (frontend bug)\n");
xen_be_set_state(xendev, XenbusStateConnected);
fb->bug_trigger = 1; /* only once */
}
}
static void fb_event(struct XenDevice *xendev)
{
struct XenFB *xenfb = container_of(xendev, struct XenFB, c.xendev);
xenfb_handle_events(xenfb);
xen_be_send_notify(&xenfb->c.xendev);
}
/* -------------------------------------------------------------------- */
struct XenDevOps xen_kbdmouse_ops = {
.size = sizeof(struct XenInput),
.init = input_init,
.initialise = input_initialise,
.connected = input_connected,
.disconnect = input_disconnect,
.event = input_event,
};
struct XenDevOps xen_framebuffer_ops = {
.size = sizeof(struct XenFB),
.init = fb_init,
.initialise = fb_initialise,
.disconnect = fb_disconnect,
.event = fb_event,
.frontend_changed = fb_frontend_changed,
};
/*
* FIXME/TODO: Kill this.
* Temporary needed while DisplayState reorganization is in flight.
*/
void xen_init_display(int domid)
{
struct XenDevice *xfb, *xin;
struct XenFB *fb;
struct XenInput *in;
int i = 0;
wait_more:
i++;
main_loop_wait(true);
xfb = xen_be_find_xendev("vfb", domid, 0);
xin = xen_be_find_xendev("vkbd", domid, 0);
if (!xfb || !xin) {
if (i < 256) {
usleep(10000);
goto wait_more;
}
xen_be_printf(NULL, 1, "displaystate setup failed\n");
return;
}
/* vfb */
fb = container_of(xfb, struct XenFB, c.xendev);
fb->c.con = graphic_console_init(xenfb_update,
xenfb_invalidate,
NULL,
fb);
fb->have_console = 1;
/* vkbd */
in = container_of(xin, struct XenInput, c.xendev);
in->c.con = fb->c.con;
/* retry ->init() */
xen_be_check_state(xin);
xen_be_check_state(xfb);
}
|