2 * xen paravirt framebuffer backend
4 * Copyright IBM, Corp. 2005-2006
5 * Copyright Red Hat, Inc. 2006-2008
8 * Anthony Liguori <aliguori@us.ibm.com>,
9 * Markus Armbruster <armbru@redhat.com>,
10 * Daniel P. Berrange <berrange@redhat.com>,
11 * Pat Campbell <plc@novell.com>,
12 * Gerd Hoffmann <kraxel@redhat.com>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; under version 2 of the License.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License along
24 * with this program; if not, see <http://www.gnu.org/licenses/>.
27 #include "qemu/osdep.h"
31 #include "ui/console.h"
32 #include "sysemu/char.h"
33 #include "hw/xen/xen_backend.h"
35 #include <xen/event_channel.h>
36 #include <xen/io/fbif.h>
37 #include <xen/io/kbdif.h>
38 #include <xen/io/protocols.h>
43 #define BTN_LEFT 0x110 /* from <linux/input.h> */
46 /* -------------------------------------------------------------------- */
49 struct XenDevice xendev
; /* must be first */
56 int abs_pointer_wanted
; /* Whether guest supports absolute pointer */
57 int button_state
; /* Last seen pointer button state */
59 QEMUPutMouseEntry
*qmouse
;
86 /* -------------------------------------------------------------------- */
88 static int common_bind(struct common
*c
)
93 if (xenstore_read_fe_uint64(&c
->xendev
, "page-ref", &val
) == -1)
98 if (xenstore_read_fe_int(&c
->xendev
, "event-channel", &c
->xendev
.remote_port
) == -1)
101 c
->page
= xenforeignmemory_map(xen_fmem
, c
->xendev
.dom
,
102 PROT_READ
| PROT_WRITE
, 1, &mfn
, NULL
);
106 xen_be_bind_evtchn(&c
->xendev
);
107 xen_be_printf(&c
->xendev
, 1, "ring mfn %"PRI_xen_pfn
", remote-port %d, local-port %d\n",
108 mfn
, c
->xendev
.remote_port
, c
->xendev
.local_port
);
113 static void common_unbind(struct common
*c
)
115 xen_be_unbind_evtchn(&c
->xendev
);
117 xenforeignmemory_unmap(xen_fmem
, c
->page
, 1);
122 /* -------------------------------------------------------------------- */
126 * These two tables are not needed any more, but left in here
127 * intentionally as documentation, to show how scancode2linux[]
130 * Tables to map from scancode to Linux input layer keycode.
131 * Scancodes are hardware-specific. These maps assumes a
132 * standard AT or PS/2 keyboard which is what QEMU feeds us.
134 const unsigned char atkbd_set2_keycode
[512] = {
136 0, 67, 65, 63, 61, 59, 60, 88, 0, 68, 66, 64, 62, 15, 41,117,
137 0, 56, 42, 93, 29, 16, 2, 0, 0, 0, 44, 31, 30, 17, 3, 0,
138 0, 46, 45, 32, 18, 5, 4, 95, 0, 57, 47, 33, 20, 19, 6,183,
139 0, 49, 48, 35, 34, 21, 7,184, 0, 0, 50, 36, 22, 8, 9,185,
140 0, 51, 37, 23, 24, 11, 10, 0, 0, 52, 53, 38, 39, 25, 12, 0,
141 0, 89, 40, 0, 26, 13, 0, 0, 58, 54, 28, 27, 0, 43, 0, 85,
142 0, 86, 91, 90, 92, 0, 14, 94, 0, 79,124, 75, 71,121, 0, 0,
143 82, 83, 80, 76, 77, 72, 1, 69, 87, 78, 81, 74, 55, 73, 70, 99,
145 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
146 217,100,255, 0, 97,165, 0, 0,156, 0, 0, 0, 0, 0, 0,125,
147 173,114, 0,113, 0, 0, 0,126,128, 0, 0,140, 0, 0, 0,127,
148 159, 0,115, 0,164, 0, 0,116,158, 0,150,166, 0, 0, 0,142,
149 157, 0, 0, 0, 0, 0, 0, 0,155, 0, 98, 0, 0,163, 0, 0,
150 226, 0, 0, 0, 0, 0, 0, 0, 0,255, 96, 0, 0, 0,143, 0,
151 0, 0, 0, 0, 0, 0, 0, 0, 0,107, 0,105,102, 0, 0,112,
152 110,111,108,112,106,103, 0,119, 0,118,109, 0, 99,104,119, 0,
156 const unsigned char atkbd_unxlate_table
[128] = {
158 0,118, 22, 30, 38, 37, 46, 54, 61, 62, 70, 69, 78, 85,102, 13,
159 21, 29, 36, 45, 44, 53, 60, 67, 68, 77, 84, 91, 90, 20, 28, 27,
160 35, 43, 52, 51, 59, 66, 75, 76, 82, 14, 18, 93, 26, 34, 33, 42,
161 50, 49, 58, 65, 73, 74, 89,124, 17, 41, 88, 5, 6, 4, 12, 3,
162 11, 2, 10, 1, 9,119,126,108,117,125,123,107,115,116,121,105,
163 114,122,112,113,127, 96, 97,120, 7, 15, 23, 31, 39, 47, 55, 63,
164 71, 79, 86, 94, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 87,111,
165 19, 25, 57, 81, 83, 92, 95, 98, 99,100,101,103,104,106,109,110
171 * for (i = 0; i < 128; i++) {
172 * scancode2linux[i] = atkbd_set2_keycode[atkbd_unxlate_table[i]];
173 * scancode2linux[i | 0x80] = atkbd_set2_keycode[atkbd_unxlate_table[i] | 0x80];
176 static const unsigned char scancode2linux
[512] = {
177 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
178 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
179 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
180 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
181 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
182 80, 81, 82, 83, 99, 0, 86, 87, 88,117, 0, 0, 95,183,184,185,
183 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
184 93, 0, 0, 89, 0, 0, 85, 91, 90, 92, 0, 94, 0,124,121, 0,
186 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
187 165, 0, 0, 0, 0, 0, 0, 0, 0,163, 0, 0, 96, 97, 0, 0,
188 113,140,164, 0,166, 0, 0, 0, 0, 0,255, 0, 0, 0,114, 0,
189 115, 0,150, 0, 0, 98,255, 99,100, 0, 0, 0, 0, 0, 0, 0,
190 0, 0, 0, 0, 0,119,119,102,103,104, 0,105,112,106,118,107,
191 108,109,110,111, 0, 0, 0, 0, 0, 0, 0,125,126,127,116,142,
192 0, 0, 0,143, 0,217,156,173,128,159,158,157,155,226, 0,112,
193 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
196 /* Send an event to the keyboard frontend driver */
197 static int xenfb_kbd_event(struct XenInput
*xenfb
,
198 union xenkbd_in_event
*event
)
200 struct xenkbd_page
*page
= xenfb
->c
.page
;
203 if (xenfb
->c
.xendev
.be_state
!= XenbusStateConnected
)
208 prod
= page
->in_prod
;
209 if (prod
- page
->in_cons
== XENKBD_IN_RING_LEN
) {
214 xen_mb(); /* ensure ring space available */
215 XENKBD_IN_RING_REF(page
, prod
) = *event
;
216 xen_wmb(); /* ensure ring contents visible */
217 page
->in_prod
= prod
+ 1;
218 return xen_be_send_notify(&xenfb
->c
.xendev
);
221 /* Send a keyboard (or mouse button) event */
222 static int xenfb_send_key(struct XenInput
*xenfb
, bool down
, int keycode
)
224 union xenkbd_in_event event
;
226 memset(&event
, 0, XENKBD_IN_EVENT_SIZE
);
227 event
.type
= XENKBD_TYPE_KEY
;
228 event
.key
.pressed
= down
? 1 : 0;
229 event
.key
.keycode
= keycode
;
231 return xenfb_kbd_event(xenfb
, &event
);
234 /* Send a relative mouse movement event */
235 static int xenfb_send_motion(struct XenInput
*xenfb
,
236 int rel_x
, int rel_y
, int rel_z
)
238 union xenkbd_in_event event
;
240 memset(&event
, 0, XENKBD_IN_EVENT_SIZE
);
241 event
.type
= XENKBD_TYPE_MOTION
;
242 event
.motion
.rel_x
= rel_x
;
243 event
.motion
.rel_y
= rel_y
;
244 #if __XEN_LATEST_INTERFACE_VERSION__ >= 0x00030207
245 event
.motion
.rel_z
= rel_z
;
248 return xenfb_kbd_event(xenfb
, &event
);
251 /* Send an absolute mouse movement event */
252 static int xenfb_send_position(struct XenInput
*xenfb
,
253 int abs_x
, int abs_y
, int z
)
255 union xenkbd_in_event event
;
257 memset(&event
, 0, XENKBD_IN_EVENT_SIZE
);
258 event
.type
= XENKBD_TYPE_POS
;
259 event
.pos
.abs_x
= abs_x
;
260 event
.pos
.abs_y
= abs_y
;
261 #if __XEN_LATEST_INTERFACE_VERSION__ == 0x00030207
264 #if __XEN_LATEST_INTERFACE_VERSION__ >= 0x00030208
268 return xenfb_kbd_event(xenfb
, &event
);
272 * Send a key event from the client to the guest OS
273 * QEMU gives us a raw scancode from an AT / PS/2 style keyboard.
274 * We have to turn this into a Linux Input layer keycode.
276 * Extra complexity from the fact that with extended scancodes
277 * (like those produced by arrow keys) this method gets called
278 * twice, but we only want to send a single event. So we have to
279 * track the '0xe0' scancode state & collapse the extended keys
282 * Wish we could just send scancodes straight to the guest which
283 * already has code for dealing with this...
285 static void xenfb_key_event(void *opaque
, int scancode
)
287 struct XenInput
*xenfb
= opaque
;
290 if (scancode
== 0xe0) {
293 } else if (scancode
& 0x80) {
297 if (xenfb
->extended
) {
301 xenfb_send_key(xenfb
, down
, scancode2linux
[scancode
]);
305 * Send a mouse event from the client to the guest OS
307 * The QEMU mouse can be in either relative, or absolute mode.
308 * Movement is sent separately from button state, which has to
309 * be encoded as virtual key events. We also don't actually get
310 * given any button up/down events, so have to track changes in
313 static void xenfb_mouse_event(void *opaque
,
314 int dx
, int dy
, int dz
, int button_state
)
316 struct XenInput
*xenfb
= opaque
;
317 DisplaySurface
*surface
= qemu_console_surface(xenfb
->c
.con
);
318 int dw
= surface_width(surface
);
319 int dh
= surface_height(surface
);
322 trace_xenfb_mouse_event(opaque
, dx
, dy
, dz
, button_state
,
323 xenfb
->abs_pointer_wanted
);
324 if (xenfb
->abs_pointer_wanted
)
325 xenfb_send_position(xenfb
,
326 dx
* (dw
- 1) / 0x7fff,
327 dy
* (dh
- 1) / 0x7fff,
330 xenfb_send_motion(xenfb
, dx
, dy
, dz
);
332 for (i
= 0 ; i
< 8 ; i
++) {
333 int lastDown
= xenfb
->button_state
& (1 << i
);
334 int down
= button_state
& (1 << i
);
335 if (down
== lastDown
)
338 if (xenfb_send_key(xenfb
, down
, BTN_LEFT
+i
) < 0)
341 xenfb
->button_state
= button_state
;
344 static int input_init(struct XenDevice
*xendev
)
346 xenstore_write_be_int(xendev
, "feature-abs-pointer", 1);
350 static int input_initialise(struct XenDevice
*xendev
)
352 struct XenInput
*in
= container_of(xendev
, struct XenInput
, c
.xendev
);
356 xen_be_printf(xendev
, 1, "ds not set (yet)\n");
360 rc
= common_bind(&in
->c
);
364 qemu_add_kbd_event_handler(xenfb_key_event
, in
);
368 static void input_connected(struct XenDevice
*xendev
)
370 struct XenInput
*in
= container_of(xendev
, struct XenInput
, c
.xendev
);
372 if (xenstore_read_fe_int(xendev
, "request-abs-pointer",
373 &in
->abs_pointer_wanted
) == -1) {
374 in
->abs_pointer_wanted
= 0;
378 qemu_remove_mouse_event_handler(in
->qmouse
);
380 trace_xenfb_input_connected(xendev
, in
->abs_pointer_wanted
);
381 in
->qmouse
= qemu_add_mouse_event_handler(xenfb_mouse_event
, in
,
382 in
->abs_pointer_wanted
,
386 static void input_disconnect(struct XenDevice
*xendev
)
388 struct XenInput
*in
= container_of(xendev
, struct XenInput
, c
.xendev
);
391 qemu_remove_mouse_event_handler(in
->qmouse
);
394 qemu_add_kbd_event_handler(NULL
, NULL
);
395 common_unbind(&in
->c
);
398 static void input_event(struct XenDevice
*xendev
)
400 struct XenInput
*xenfb
= container_of(xendev
, struct XenInput
, c
.xendev
);
401 struct xenkbd_page
*page
= xenfb
->c
.page
;
403 /* We don't understand any keyboard events, so just ignore them. */
404 if (page
->out_prod
== page
->out_cons
)
406 page
->out_cons
= page
->out_prod
;
407 xen_be_send_notify(&xenfb
->c
.xendev
);
410 /* -------------------------------------------------------------------- */
412 static void xenfb_copy_mfns(int mode
, int count
, xen_pfn_t
*dst
, void *src
)
414 uint32_t *src32
= src
;
415 uint64_t *src64
= src
;
418 for (i
= 0; i
< count
; i
++)
419 dst
[i
] = (mode
== 32) ? src32
[i
] : src64
[i
];
422 static int xenfb_map_fb(struct XenFB
*xenfb
)
424 struct xenfb_page
*page
= xenfb
->c
.page
;
425 char *protocol
= xenfb
->c
.xendev
.protocol
;
427 xen_pfn_t
*pgmfns
= NULL
;
428 xen_pfn_t
*fbmfns
= NULL
;
432 /* default to native */
434 mode
= sizeof(unsigned long) * 8;
438 * Undefined protocol, some guesswork needed.
440 * Old frontends which don't set the protocol use
441 * one page directory only, thus pd[1] must be zero.
442 * pd[1] of the 32bit struct layout and the lower
443 * 32 bits of pd[0] of the 64bit struct layout have
444 * the same location, so we can check that ...
446 uint32_t *ptr32
= NULL
;
447 uint32_t *ptr64
= NULL
;
448 #if defined(__i386__)
449 ptr32
= (void*)page
->pd
;
450 ptr64
= ((void*)page
->pd
) + 4;
451 #elif defined(__x86_64__)
452 ptr32
= ((void*)page
->pd
) - 4;
453 ptr64
= (void*)page
->pd
;
464 #if defined(__x86_64__)
465 } else if (strcmp(protocol
, XEN_IO_PROTO_ABI_X86_32
) == 0) {
466 /* 64bit dom0, 32bit domU */
468 pd
= ((void*)page
->pd
) - 4;
469 #elif defined(__i386__)
470 } else if (strcmp(protocol
, XEN_IO_PROTO_ABI_X86_64
) == 0) {
471 /* 32bit dom0, 64bit domU */
473 pd
= ((void*)page
->pd
) + 4;
478 munmap(xenfb
->pixels
, xenfb
->fbpages
* XC_PAGE_SIZE
);
479 xenfb
->pixels
= NULL
;
482 xenfb
->fbpages
= (xenfb
->fb_len
+ (XC_PAGE_SIZE
- 1)) / XC_PAGE_SIZE
;
483 n_fbdirs
= xenfb
->fbpages
* mode
/ 8;
484 n_fbdirs
= (n_fbdirs
+ (XC_PAGE_SIZE
- 1)) / XC_PAGE_SIZE
;
486 pgmfns
= g_malloc0(sizeof(xen_pfn_t
) * n_fbdirs
);
487 fbmfns
= g_malloc0(sizeof(xen_pfn_t
) * xenfb
->fbpages
);
489 xenfb_copy_mfns(mode
, n_fbdirs
, pgmfns
, pd
);
490 map
= xenforeignmemory_map(xen_fmem
, xenfb
->c
.xendev
.dom
,
491 PROT_READ
, n_fbdirs
, pgmfns
, NULL
);
494 xenfb_copy_mfns(mode
, xenfb
->fbpages
, fbmfns
, map
);
495 xenforeignmemory_unmap(xen_fmem
, map
, n_fbdirs
);
497 xenfb
->pixels
= xenforeignmemory_map(xen_fmem
, xenfb
->c
.xendev
.dom
,
498 PROT_READ
, xenfb
->fbpages
, fbmfns
, NULL
);
499 if (xenfb
->pixels
== NULL
)
502 ret
= 0; /* all is fine */
510 static int xenfb_configure_fb(struct XenFB
*xenfb
, size_t fb_len_lim
,
511 int width
, int height
, int depth
,
512 size_t fb_len
, int offset
, int row_stride
)
514 size_t mfn_sz
= sizeof(*((struct xenfb_page
*)0)->pd
);
515 size_t pd_len
= sizeof(((struct xenfb_page
*)0)->pd
) / mfn_sz
;
516 size_t fb_pages
= pd_len
* XC_PAGE_SIZE
/ mfn_sz
;
517 size_t fb_len_max
= fb_pages
* XC_PAGE_SIZE
;
518 int max_width
, max_height
;
520 if (fb_len_lim
> fb_len_max
) {
521 xen_be_printf(&xenfb
->c
.xendev
, 0, "fb size limit %zu exceeds %zu, corrected\n",
522 fb_len_lim
, fb_len_max
);
523 fb_len_lim
= fb_len_max
;
525 if (fb_len_lim
&& fb_len
> fb_len_lim
) {
526 xen_be_printf(&xenfb
->c
.xendev
, 0, "frontend fb size %zu limited to %zu\n",
530 if (depth
!= 8 && depth
!= 16 && depth
!= 24 && depth
!= 32) {
531 xen_be_printf(&xenfb
->c
.xendev
, 0, "can't handle frontend fb depth %d\n",
535 if (row_stride
<= 0 || row_stride
> fb_len
) {
536 xen_be_printf(&xenfb
->c
.xendev
, 0, "invalid frontend stride %d\n", row_stride
);
539 max_width
= row_stride
/ (depth
/ 8);
540 if (width
< 0 || width
> max_width
) {
541 xen_be_printf(&xenfb
->c
.xendev
, 0, "invalid frontend width %d limited to %d\n",
545 if (offset
< 0 || offset
>= fb_len
) {
546 xen_be_printf(&xenfb
->c
.xendev
, 0, "invalid frontend offset %d (max %zu)\n",
550 max_height
= (fb_len
- offset
) / row_stride
;
551 if (height
< 0 || height
> max_height
) {
552 xen_be_printf(&xenfb
->c
.xendev
, 0, "invalid frontend height %d limited to %d\n",
556 xenfb
->fb_len
= fb_len
;
557 xenfb
->row_stride
= row_stride
;
558 xenfb
->depth
= depth
;
559 xenfb
->width
= width
;
560 xenfb
->height
= height
;
561 xenfb
->offset
= offset
;
562 xenfb
->up_fullscreen
= 1;
563 xenfb
->do_resize
= 1;
564 xen_be_printf(&xenfb
->c
.xendev
, 1, "framebuffer %dx%dx%d offset %d stride %d\n",
565 width
, height
, depth
, offset
, row_stride
);
569 /* A convenient function for munging pixels between different depths */
570 #define BLT(SRC_T,DST_T,RSB,GSB,BSB,RDB,GDB,BDB) \
571 for (line = y ; line < (y+h) ; line++) { \
572 SRC_T *src = (SRC_T *)(xenfb->pixels \
574 + (line * xenfb->row_stride) \
575 + (x * xenfb->depth / 8)); \
576 DST_T *dst = (DST_T *)(data \
577 + (line * linesize) \
580 const int RSS = 32 - (RSB + GSB + BSB); \
581 const int GSS = 32 - (GSB + BSB); \
582 const int BSS = 32 - (BSB); \
583 const uint32_t RSM = (~0U) << (32 - RSB); \
584 const uint32_t GSM = (~0U) << (32 - GSB); \
585 const uint32_t BSM = (~0U) << (32 - BSB); \
586 const int RDS = 32 - (RDB + GDB + BDB); \
587 const int GDS = 32 - (GDB + BDB); \
588 const int BDS = 32 - (BDB); \
589 const uint32_t RDM = (~0U) << (32 - RDB); \
590 const uint32_t GDM = (~0U) << (32 - GDB); \
591 const uint32_t BDM = (~0U) << (32 - BDB); \
592 for (col = x ; col < (x+w) ; col++) { \
593 uint32_t spix = *src; \
594 *dst = (((spix << RSS) & RSM & RDM) >> RDS) | \
595 (((spix << GSS) & GSM & GDM) >> GDS) | \
596 (((spix << BSS) & BSM & BDM) >> BDS); \
597 src = (SRC_T *) ((unsigned long) src + xenfb->depth / 8); \
598 dst = (DST_T *) ((unsigned long) dst + bpp / 8); \
604 * This copies data from the guest framebuffer region, into QEMU's
605 * displaysurface. qemu uses 16 or 32 bpp. In case the pv framebuffer
606 * uses something else we must convert and copy, otherwise we can
607 * supply the buffer directly and no thing here.
609 static void xenfb_guest_copy(struct XenFB
*xenfb
, int x
, int y
, int w
, int h
)
611 DisplaySurface
*surface
= qemu_console_surface(xenfb
->c
.con
);
613 int bpp
= surface_bits_per_pixel(surface
);
614 int linesize
= surface_stride(surface
);
615 uint8_t *data
= surface_data(surface
);
617 if (!is_buffer_shared(surface
)) {
618 switch (xenfb
->depth
) {
621 BLT(uint8_t, uint16_t, 3, 3, 2, 5, 6, 5);
622 } else if (bpp
== 32) {
623 BLT(uint8_t, uint32_t, 3, 3, 2, 8, 8, 8);
630 BLT(uint32_t, uint16_t, 8, 8, 8, 5, 6, 5);
631 } else if (bpp
== 32) {
632 BLT(uint32_t, uint32_t, 8, 8, 8, 8, 8, 8);
641 if (oops
) /* should not happen */
642 xen_be_printf(&xenfb
->c
.xendev
, 0, "%s: oops: convert %d -> %d bpp?\n",
643 __FUNCTION__
, xenfb
->depth
, bpp
);
645 dpy_gfx_update(xenfb
->c
.con
, x
, y
, w
, h
);
648 #ifdef XENFB_TYPE_REFRESH_PERIOD
649 static int xenfb_queue_full(struct XenFB
*xenfb
)
651 struct xenfb_page
*page
= xenfb
->c
.page
;
657 prod
= page
->in_prod
;
658 cons
= page
->in_cons
;
659 return prod
- cons
== XENFB_IN_RING_LEN
;
662 static void xenfb_send_event(struct XenFB
*xenfb
, union xenfb_in_event
*event
)
665 struct xenfb_page
*page
= xenfb
->c
.page
;
667 prod
= page
->in_prod
;
668 /* caller ensures !xenfb_queue_full() */
669 xen_mb(); /* ensure ring space available */
670 XENFB_IN_RING_REF(page
, prod
) = *event
;
671 xen_wmb(); /* ensure ring contents visible */
672 page
->in_prod
= prod
+ 1;
674 xen_be_send_notify(&xenfb
->c
.xendev
);
677 static void xenfb_send_refresh_period(struct XenFB
*xenfb
, int period
)
679 union xenfb_in_event event
;
681 memset(&event
, 0, sizeof(event
));
682 event
.type
= XENFB_TYPE_REFRESH_PERIOD
;
683 event
.refresh_period
.period
= period
;
684 xenfb_send_event(xenfb
, &event
);
689 * Periodic update of display.
690 * Also transmit the refresh interval to the frontend.
692 * Never ever do any qemu display operations
693 * (resize, screen update) outside this function.
694 * Our screen might be inactive. When asked for
695 * an update we know it is active.
697 static void xenfb_update(void *opaque
)
699 struct XenFB
*xenfb
= opaque
;
700 DisplaySurface
*surface
;
703 if (xenfb
->c
.xendev
.be_state
!= XenbusStateConnected
)
706 if (!xenfb
->feature_update
) {
707 /* we don't get update notifications, thus use the
708 * sledge hammer approach ... */
709 xenfb
->up_fullscreen
= 1;
712 /* resize if needed */
713 if (xenfb
->do_resize
) {
714 pixman_format_code_t format
;
716 xenfb
->do_resize
= 0;
717 switch (xenfb
->depth
) {
720 /* console.c supported depth -> buffer can be used directly */
721 format
= qemu_default_pixman_format(xenfb
->depth
, true);
722 surface
= qemu_create_displaysurface_from
723 (xenfb
->width
, xenfb
->height
, format
,
724 xenfb
->row_stride
, xenfb
->pixels
+ xenfb
->offset
);
727 /* we must convert stuff */
728 surface
= qemu_create_displaysurface(xenfb
->width
, xenfb
->height
);
731 dpy_gfx_replace_surface(xenfb
->c
.con
, surface
);
732 xen_be_printf(&xenfb
->c
.xendev
, 1, "update: resizing: %dx%d @ %d bpp%s\n",
733 xenfb
->width
, xenfb
->height
, xenfb
->depth
,
734 is_buffer_shared(surface
) ? " (shared)" : "");
735 xenfb
->up_fullscreen
= 1;
738 /* run queued updates */
739 if (xenfb
->up_fullscreen
) {
740 xen_be_printf(&xenfb
->c
.xendev
, 3, "update: fullscreen\n");
741 xenfb_guest_copy(xenfb
, 0, 0, xenfb
->width
, xenfb
->height
);
742 } else if (xenfb
->up_count
) {
743 xen_be_printf(&xenfb
->c
.xendev
, 3, "update: %d rects\n", xenfb
->up_count
);
744 for (i
= 0; i
< xenfb
->up_count
; i
++)
745 xenfb_guest_copy(xenfb
,
746 xenfb
->up_rects
[i
].x
,
747 xenfb
->up_rects
[i
].y
,
748 xenfb
->up_rects
[i
].w
,
749 xenfb
->up_rects
[i
].h
);
751 xen_be_printf(&xenfb
->c
.xendev
, 3, "update: nothing\n");
754 xenfb
->up_fullscreen
= 0;
757 static void xenfb_update_interval(void *opaque
, uint64_t interval
)
759 struct XenFB
*xenfb
= opaque
;
761 if (xenfb
->feature_update
) {
762 #ifdef XENFB_TYPE_REFRESH_PERIOD
763 if (xenfb_queue_full(xenfb
)) {
766 xenfb_send_refresh_period(xenfb
, interval
);
771 /* QEMU display state changed, so refresh the framebuffer copy */
772 static void xenfb_invalidate(void *opaque
)
774 struct XenFB
*xenfb
= opaque
;
775 xenfb
->up_fullscreen
= 1;
778 static void xenfb_handle_events(struct XenFB
*xenfb
)
780 uint32_t prod
, cons
, out_cons
;
781 struct xenfb_page
*page
= xenfb
->c
.page
;
783 prod
= page
->out_prod
;
784 out_cons
= page
->out_cons
;
785 if (prod
- out_cons
>= XENFB_OUT_RING_LEN
) {
788 xen_rmb(); /* ensure we see ring contents up to prod */
789 for (cons
= out_cons
; cons
!= prod
; cons
++) {
790 union xenfb_out_event
*event
= &XENFB_OUT_RING_REF(page
, cons
);
791 uint8_t type
= event
->type
;
795 case XENFB_TYPE_UPDATE
:
796 if (xenfb
->up_count
== UP_QUEUE
)
797 xenfb
->up_fullscreen
= 1;
798 if (xenfb
->up_fullscreen
)
800 x
= MAX(event
->update
.x
, 0);
801 y
= MAX(event
->update
.y
, 0);
802 w
= MIN(event
->update
.width
, xenfb
->width
- x
);
803 h
= MIN(event
->update
.height
, xenfb
->height
- y
);
804 if (w
< 0 || h
< 0) {
805 xen_be_printf(&xenfb
->c
.xendev
, 1, "bogus update ignored\n");
808 if (x
!= event
->update
.x
||
809 y
!= event
->update
.y
||
810 w
!= event
->update
.width
||
811 h
!= event
->update
.height
) {
812 xen_be_printf(&xenfb
->c
.xendev
, 1, "bogus update clipped\n");
814 if (w
== xenfb
->width
&& h
> xenfb
->height
/ 2) {
815 /* scroll detector: updated more than 50% of the lines,
816 * don't bother keeping track of the rectangles then */
817 xenfb
->up_fullscreen
= 1;
819 xenfb
->up_rects
[xenfb
->up_count
].x
= x
;
820 xenfb
->up_rects
[xenfb
->up_count
].y
= y
;
821 xenfb
->up_rects
[xenfb
->up_count
].w
= w
;
822 xenfb
->up_rects
[xenfb
->up_count
].h
= h
;
826 #ifdef XENFB_TYPE_RESIZE
827 case XENFB_TYPE_RESIZE
:
828 if (xenfb_configure_fb(xenfb
, xenfb
->fb_len
,
830 event
->resize
.height
,
833 event
->resize
.offset
,
834 event
->resize
.stride
) < 0)
836 xenfb_invalidate(xenfb
);
841 xen_mb(); /* ensure we're done with ring contents */
842 page
->out_cons
= cons
;
845 static int fb_init(struct XenDevice
*xendev
)
847 #ifdef XENFB_TYPE_RESIZE
848 xenstore_write_be_int(xendev
, "feature-resize", 1);
853 static int fb_initialise(struct XenDevice
*xendev
)
855 struct XenFB
*fb
= container_of(xendev
, struct XenFB
, c
.xendev
);
856 struct xenfb_page
*fb_page
;
860 if (xenstore_read_fe_int(xendev
, "videoram", &videoram
) == -1)
863 rc
= common_bind(&fb
->c
);
867 fb_page
= fb
->c
.page
;
868 rc
= xenfb_configure_fb(fb
, videoram
* 1024 * 1024U,
869 fb_page
->width
, fb_page
->height
, fb_page
->depth
,
870 fb_page
->mem_length
, 0, fb_page
->line_length
);
874 rc
= xenfb_map_fb(fb
);
878 #if 0 /* handled in xen_init_display() for now */
879 if (!fb
->have_console
) {
880 fb
->c
.ds
= graphic_console_init(xenfb_update
,
885 fb
->have_console
= 1;
889 if (xenstore_read_fe_int(xendev
, "feature-update", &fb
->feature_update
) == -1)
890 fb
->feature_update
= 0;
891 if (fb
->feature_update
)
892 xenstore_write_be_int(xendev
, "request-update", 1);
894 xen_be_printf(xendev
, 1, "feature-update=%d, videoram=%d\n",
895 fb
->feature_update
, videoram
);
899 static void fb_disconnect(struct XenDevice
*xendev
)
901 struct XenFB
*fb
= container_of(xendev
, struct XenFB
, c
.xendev
);
904 * FIXME: qemu can't un-init gfx display (yet?).
905 * Replacing the framebuffer with anonymous shared memory
906 * instead. This releases the guest pages and keeps qemu happy.
908 xenforeignmemory_unmap(xen_fmem
, fb
->pixels
, fb
->fbpages
);
909 fb
->pixels
= mmap(fb
->pixels
, fb
->fbpages
* XC_PAGE_SIZE
,
910 PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANON
,
912 if (fb
->pixels
== MAP_FAILED
) {
913 xen_be_printf(xendev
, 0,
914 "Couldn't replace the framebuffer with anonymous memory errno=%d\n",
917 common_unbind(&fb
->c
);
918 fb
->feature_update
= 0;
922 static void fb_frontend_changed(struct XenDevice
*xendev
, const char *node
)
924 struct XenFB
*fb
= container_of(xendev
, struct XenFB
, c
.xendev
);
927 * Set state to Connected *again* once the frontend switched
928 * to connected. We must trigger the watch a second time to
929 * workaround a frontend bug.
931 if (fb
->bug_trigger
== 0 && strcmp(node
, "state") == 0 &&
932 xendev
->fe_state
== XenbusStateConnected
&&
933 xendev
->be_state
== XenbusStateConnected
) {
934 xen_be_printf(xendev
, 2, "re-trigger connected (frontend bug)\n");
935 xen_be_set_state(xendev
, XenbusStateConnected
);
936 fb
->bug_trigger
= 1; /* only once */
940 static void fb_event(struct XenDevice
*xendev
)
942 struct XenFB
*xenfb
= container_of(xendev
, struct XenFB
, c
.xendev
);
944 xenfb_handle_events(xenfb
);
945 xen_be_send_notify(&xenfb
->c
.xendev
);
948 /* -------------------------------------------------------------------- */
950 struct XenDevOps xen_kbdmouse_ops
= {
951 .size
= sizeof(struct XenInput
),
953 .initialise
= input_initialise
,
954 .connected
= input_connected
,
955 .disconnect
= input_disconnect
,
956 .event
= input_event
,
959 struct XenDevOps xen_framebuffer_ops
= {
960 .size
= sizeof(struct XenFB
),
962 .initialise
= fb_initialise
,
963 .disconnect
= fb_disconnect
,
965 .frontend_changed
= fb_frontend_changed
,
968 static const GraphicHwOps xenfb_ops
= {
969 .invalidate
= xenfb_invalidate
,
970 .gfx_update
= xenfb_update
,
971 .update_interval
= xenfb_update_interval
,
975 * FIXME/TODO: Kill this.
976 * Temporary needed while DisplayState reorganization is in flight.
978 void xen_init_display(int domid
)
980 struct XenDevice
*xfb
, *xin
;
987 main_loop_wait(true);
988 xfb
= xen_be_find_xendev("vfb", domid
, 0);
989 xin
= xen_be_find_xendev("vkbd", domid
, 0);
995 xen_be_printf(NULL
, 1, "displaystate setup failed\n");
1000 fb
= container_of(xfb
, struct XenFB
, c
.xendev
);
1001 fb
->c
.con
= graphic_console_init(NULL
, 0, &xenfb_ops
, fb
);
1002 fb
->have_console
= 1;
1005 in
= container_of(xin
, struct XenInput
, c
.xendev
);
1006 in
->c
.con
= fb
->c
.con
;
1008 /* retry ->init() */
1009 xen_be_check_state(xin
);
1010 xen_be_check_state(xfb
);