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/>.
29 #include <sys/types.h>
39 #include "ui/console.h"
40 #include "sysemu/char.h"
41 #include "hw/xen/xen_backend.h"
43 #include <xen/event_channel.h>
44 #include <xen/io/fbif.h>
45 #include <xen/io/kbdif.h>
46 #include <xen/io/protocols.h>
51 #define BTN_LEFT 0x110 /* from <linux/input.h> */
54 /* -------------------------------------------------------------------- */
57 struct XenDevice xendev
; /* must be first */
64 int abs_pointer_wanted
; /* Whether guest supports absolute pointer */
65 int button_state
; /* Last seen pointer button state */
67 QEMUPutMouseEntry
*qmouse
;
94 /* -------------------------------------------------------------------- */
96 static int common_bind(struct common
*c
)
101 if (xenstore_read_fe_uint64(&c
->xendev
, "page-ref", &val
) == -1)
103 mfn
= (xen_pfn_t
)val
;
106 if (xenstore_read_fe_int(&c
->xendev
, "event-channel", &c
->xendev
.remote_port
) == -1)
109 c
->page
= xc_map_foreign_pages(xen_xc
, c
->xendev
.dom
,
110 PROT_READ
| PROT_WRITE
, &mfn
, 1);
114 xen_be_bind_evtchn(&c
->xendev
);
115 xen_be_printf(&c
->xendev
, 1, "ring mfn %"PRI_xen_pfn
", remote-port %d, local-port %d\n",
116 mfn
, c
->xendev
.remote_port
, c
->xendev
.local_port
);
121 static void common_unbind(struct common
*c
)
123 xen_be_unbind_evtchn(&c
->xendev
);
125 munmap(c
->page
, XC_PAGE_SIZE
);
130 /* -------------------------------------------------------------------- */
134 * These two tables are not needed any more, but left in here
135 * intentionally as documentation, to show how scancode2linux[]
138 * Tables to map from scancode to Linux input layer keycode.
139 * Scancodes are hardware-specific. These maps assumes a
140 * standard AT or PS/2 keyboard which is what QEMU feeds us.
142 const unsigned char atkbd_set2_keycode
[512] = {
144 0, 67, 65, 63, 61, 59, 60, 88, 0, 68, 66, 64, 62, 15, 41,117,
145 0, 56, 42, 93, 29, 16, 2, 0, 0, 0, 44, 31, 30, 17, 3, 0,
146 0, 46, 45, 32, 18, 5, 4, 95, 0, 57, 47, 33, 20, 19, 6,183,
147 0, 49, 48, 35, 34, 21, 7,184, 0, 0, 50, 36, 22, 8, 9,185,
148 0, 51, 37, 23, 24, 11, 10, 0, 0, 52, 53, 38, 39, 25, 12, 0,
149 0, 89, 40, 0, 26, 13, 0, 0, 58, 54, 28, 27, 0, 43, 0, 85,
150 0, 86, 91, 90, 92, 0, 14, 94, 0, 79,124, 75, 71,121, 0, 0,
151 82, 83, 80, 76, 77, 72, 1, 69, 87, 78, 81, 74, 55, 73, 70, 99,
153 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
154 217,100,255, 0, 97,165, 0, 0,156, 0, 0, 0, 0, 0, 0,125,
155 173,114, 0,113, 0, 0, 0,126,128, 0, 0,140, 0, 0, 0,127,
156 159, 0,115, 0,164, 0, 0,116,158, 0,150,166, 0, 0, 0,142,
157 157, 0, 0, 0, 0, 0, 0, 0,155, 0, 98, 0, 0,163, 0, 0,
158 226, 0, 0, 0, 0, 0, 0, 0, 0,255, 96, 0, 0, 0,143, 0,
159 0, 0, 0, 0, 0, 0, 0, 0, 0,107, 0,105,102, 0, 0,112,
160 110,111,108,112,106,103, 0,119, 0,118,109, 0, 99,104,119, 0,
164 const unsigned char atkbd_unxlate_table
[128] = {
166 0,118, 22, 30, 38, 37, 46, 54, 61, 62, 70, 69, 78, 85,102, 13,
167 21, 29, 36, 45, 44, 53, 60, 67, 68, 77, 84, 91, 90, 20, 28, 27,
168 35, 43, 52, 51, 59, 66, 75, 76, 82, 14, 18, 93, 26, 34, 33, 42,
169 50, 49, 58, 65, 73, 74, 89,124, 17, 41, 88, 5, 6, 4, 12, 3,
170 11, 2, 10, 1, 9,119,126,108,117,125,123,107,115,116,121,105,
171 114,122,112,113,127, 96, 97,120, 7, 15, 23, 31, 39, 47, 55, 63,
172 71, 79, 86, 94, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 87,111,
173 19, 25, 57, 81, 83, 92, 95, 98, 99,100,101,103,104,106,109,110
179 * for (i = 0; i < 128; i++) {
180 * scancode2linux[i] = atkbd_set2_keycode[atkbd_unxlate_table[i]];
181 * scancode2linux[i | 0x80] = atkbd_set2_keycode[atkbd_unxlate_table[i] | 0x80];
184 static const unsigned char scancode2linux
[512] = {
185 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
186 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
187 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
188 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
189 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
190 80, 81, 82, 83, 99, 0, 86, 87, 88,117, 0, 0, 95,183,184,185,
191 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
192 93, 0, 0, 89, 0, 0, 85, 91, 90, 92, 0, 94, 0,124,121, 0,
194 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
195 165, 0, 0, 0, 0, 0, 0, 0, 0,163, 0, 0, 96, 97, 0, 0,
196 113,140,164, 0,166, 0, 0, 0, 0, 0,255, 0, 0, 0,114, 0,
197 115, 0,150, 0, 0, 98,255, 99,100, 0, 0, 0, 0, 0, 0, 0,
198 0, 0, 0, 0, 0,119,119,102,103,104, 0,105,112,106,118,107,
199 108,109,110,111, 0, 0, 0, 0, 0, 0, 0,125,126,127,116,142,
200 0, 0, 0,143, 0,217,156,173,128,159,158,157,155,226, 0,112,
201 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
204 /* Send an event to the keyboard frontend driver */
205 static int xenfb_kbd_event(struct XenInput
*xenfb
,
206 union xenkbd_in_event
*event
)
208 struct xenkbd_page
*page
= xenfb
->c
.page
;
211 if (xenfb
->c
.xendev
.be_state
!= XenbusStateConnected
)
216 prod
= page
->in_prod
;
217 if (prod
- page
->in_cons
== XENKBD_IN_RING_LEN
) {
222 xen_mb(); /* ensure ring space available */
223 XENKBD_IN_RING_REF(page
, prod
) = *event
;
224 xen_wmb(); /* ensure ring contents visible */
225 page
->in_prod
= prod
+ 1;
226 return xen_be_send_notify(&xenfb
->c
.xendev
);
229 /* Send a keyboard (or mouse button) event */
230 static int xenfb_send_key(struct XenInput
*xenfb
, bool down
, int keycode
)
232 union xenkbd_in_event event
;
234 memset(&event
, 0, XENKBD_IN_EVENT_SIZE
);
235 event
.type
= XENKBD_TYPE_KEY
;
236 event
.key
.pressed
= down
? 1 : 0;
237 event
.key
.keycode
= keycode
;
239 return xenfb_kbd_event(xenfb
, &event
);
242 /* Send a relative mouse movement event */
243 static int xenfb_send_motion(struct XenInput
*xenfb
,
244 int rel_x
, int rel_y
, int rel_z
)
246 union xenkbd_in_event event
;
248 memset(&event
, 0, XENKBD_IN_EVENT_SIZE
);
249 event
.type
= XENKBD_TYPE_MOTION
;
250 event
.motion
.rel_x
= rel_x
;
251 event
.motion
.rel_y
= rel_y
;
252 #if __XEN_LATEST_INTERFACE_VERSION__ >= 0x00030207
253 event
.motion
.rel_z
= rel_z
;
256 return xenfb_kbd_event(xenfb
, &event
);
259 /* Send an absolute mouse movement event */
260 static int xenfb_send_position(struct XenInput
*xenfb
,
261 int abs_x
, int abs_y
, int z
)
263 union xenkbd_in_event event
;
265 memset(&event
, 0, XENKBD_IN_EVENT_SIZE
);
266 event
.type
= XENKBD_TYPE_POS
;
267 event
.pos
.abs_x
= abs_x
;
268 event
.pos
.abs_y
= abs_y
;
269 #if __XEN_LATEST_INTERFACE_VERSION__ == 0x00030207
272 #if __XEN_LATEST_INTERFACE_VERSION__ >= 0x00030208
276 return xenfb_kbd_event(xenfb
, &event
);
280 * Send a key event from the client to the guest OS
281 * QEMU gives us a raw scancode from an AT / PS/2 style keyboard.
282 * We have to turn this into a Linux Input layer keycode.
284 * Extra complexity from the fact that with extended scancodes
285 * (like those produced by arrow keys) this method gets called
286 * twice, but we only want to send a single event. So we have to
287 * track the '0xe0' scancode state & collapse the extended keys
290 * Wish we could just send scancodes straight to the guest which
291 * already has code for dealing with this...
293 static void xenfb_key_event(void *opaque
, int scancode
)
295 struct XenInput
*xenfb
= opaque
;
298 if (scancode
== 0xe0) {
301 } else if (scancode
& 0x80) {
305 if (xenfb
->extended
) {
309 xenfb_send_key(xenfb
, down
, scancode2linux
[scancode
]);
313 * Send a mouse event from the client to the guest OS
315 * The QEMU mouse can be in either relative, or absolute mode.
316 * Movement is sent separately from button state, which has to
317 * be encoded as virtual key events. We also don't actually get
318 * given any button up/down events, so have to track changes in
321 static void xenfb_mouse_event(void *opaque
,
322 int dx
, int dy
, int dz
, int button_state
)
324 struct XenInput
*xenfb
= opaque
;
325 DisplaySurface
*surface
= qemu_console_surface(xenfb
->c
.con
);
326 int dw
= surface_width(surface
);
327 int dh
= surface_height(surface
);
330 trace_xenfb_mouse_event(opaque
, dx
, dy
, dz
, button_state
,
331 xenfb
->abs_pointer_wanted
);
332 if (xenfb
->abs_pointer_wanted
)
333 xenfb_send_position(xenfb
,
334 dx
* (dw
- 1) / 0x7fff,
335 dy
* (dh
- 1) / 0x7fff,
338 xenfb_send_motion(xenfb
, dx
, dy
, dz
);
340 for (i
= 0 ; i
< 8 ; i
++) {
341 int lastDown
= xenfb
->button_state
& (1 << i
);
342 int down
= button_state
& (1 << i
);
343 if (down
== lastDown
)
346 if (xenfb_send_key(xenfb
, down
, BTN_LEFT
+i
) < 0)
349 xenfb
->button_state
= button_state
;
352 static int input_init(struct XenDevice
*xendev
)
354 xenstore_write_be_int(xendev
, "feature-abs-pointer", 1);
358 static int input_initialise(struct XenDevice
*xendev
)
360 struct XenInput
*in
= container_of(xendev
, struct XenInput
, c
.xendev
);
364 xen_be_printf(xendev
, 1, "ds not set (yet)\n");
368 rc
= common_bind(&in
->c
);
372 qemu_add_kbd_event_handler(xenfb_key_event
, in
);
376 static void input_connected(struct XenDevice
*xendev
)
378 struct XenInput
*in
= container_of(xendev
, struct XenInput
, c
.xendev
);
380 if (xenstore_read_fe_int(xendev
, "request-abs-pointer",
381 &in
->abs_pointer_wanted
) == -1) {
382 in
->abs_pointer_wanted
= 0;
386 qemu_remove_mouse_event_handler(in
->qmouse
);
388 trace_xenfb_input_connected(xendev
, in
->abs_pointer_wanted
);
389 in
->qmouse
= qemu_add_mouse_event_handler(xenfb_mouse_event
, in
,
390 in
->abs_pointer_wanted
,
394 static void input_disconnect(struct XenDevice
*xendev
)
396 struct XenInput
*in
= container_of(xendev
, struct XenInput
, c
.xendev
);
399 qemu_remove_mouse_event_handler(in
->qmouse
);
402 qemu_add_kbd_event_handler(NULL
, NULL
);
403 common_unbind(&in
->c
);
406 static void input_event(struct XenDevice
*xendev
)
408 struct XenInput
*xenfb
= container_of(xendev
, struct XenInput
, c
.xendev
);
409 struct xenkbd_page
*page
= xenfb
->c
.page
;
411 /* We don't understand any keyboard events, so just ignore them. */
412 if (page
->out_prod
== page
->out_cons
)
414 page
->out_cons
= page
->out_prod
;
415 xen_be_send_notify(&xenfb
->c
.xendev
);
418 /* -------------------------------------------------------------------- */
420 static void xenfb_copy_mfns(int mode
, int count
, xen_pfn_t
*dst
, void *src
)
422 uint32_t *src32
= src
;
423 uint64_t *src64
= src
;
426 for (i
= 0; i
< count
; i
++)
427 dst
[i
] = (mode
== 32) ? src32
[i
] : src64
[i
];
430 static int xenfb_map_fb(struct XenFB
*xenfb
)
432 struct xenfb_page
*page
= xenfb
->c
.page
;
433 char *protocol
= xenfb
->c
.xendev
.protocol
;
435 xen_pfn_t
*pgmfns
= NULL
;
436 xen_pfn_t
*fbmfns
= NULL
;
440 /* default to native */
442 mode
= sizeof(unsigned long) * 8;
446 * Undefined protocol, some guesswork needed.
448 * Old frontends which don't set the protocol use
449 * one page directory only, thus pd[1] must be zero.
450 * pd[1] of the 32bit struct layout and the lower
451 * 32 bits of pd[0] of the 64bit struct layout have
452 * the same location, so we can check that ...
454 uint32_t *ptr32
= NULL
;
455 uint32_t *ptr64
= NULL
;
456 #if defined(__i386__)
457 ptr32
= (void*)page
->pd
;
458 ptr64
= ((void*)page
->pd
) + 4;
459 #elif defined(__x86_64__)
460 ptr32
= ((void*)page
->pd
) - 4;
461 ptr64
= (void*)page
->pd
;
472 #if defined(__x86_64__)
473 } else if (strcmp(protocol
, XEN_IO_PROTO_ABI_X86_32
) == 0) {
474 /* 64bit dom0, 32bit domU */
476 pd
= ((void*)page
->pd
) - 4;
477 #elif defined(__i386__)
478 } else if (strcmp(protocol
, XEN_IO_PROTO_ABI_X86_64
) == 0) {
479 /* 32bit dom0, 64bit domU */
481 pd
= ((void*)page
->pd
) + 4;
486 munmap(xenfb
->pixels
, xenfb
->fbpages
* XC_PAGE_SIZE
);
487 xenfb
->pixels
= NULL
;
490 xenfb
->fbpages
= (xenfb
->fb_len
+ (XC_PAGE_SIZE
- 1)) / XC_PAGE_SIZE
;
491 n_fbdirs
= xenfb
->fbpages
* mode
/ 8;
492 n_fbdirs
= (n_fbdirs
+ (XC_PAGE_SIZE
- 1)) / XC_PAGE_SIZE
;
494 pgmfns
= g_malloc0(sizeof(xen_pfn_t
) * n_fbdirs
);
495 fbmfns
= g_malloc0(sizeof(xen_pfn_t
) * xenfb
->fbpages
);
497 xenfb_copy_mfns(mode
, n_fbdirs
, pgmfns
, pd
);
498 map
= xc_map_foreign_pages(xen_xc
, xenfb
->c
.xendev
.dom
,
499 PROT_READ
, pgmfns
, n_fbdirs
);
502 xenfb_copy_mfns(mode
, xenfb
->fbpages
, fbmfns
, map
);
503 munmap(map
, n_fbdirs
* XC_PAGE_SIZE
);
505 xenfb
->pixels
= xc_map_foreign_pages(xen_xc
, xenfb
->c
.xendev
.dom
,
506 PROT_READ
, fbmfns
, xenfb
->fbpages
);
507 if (xenfb
->pixels
== NULL
)
510 ret
= 0; /* all is fine */
518 static int xenfb_configure_fb(struct XenFB
*xenfb
, size_t fb_len_lim
,
519 int width
, int height
, int depth
,
520 size_t fb_len
, int offset
, int row_stride
)
522 size_t mfn_sz
= sizeof(*((struct xenfb_page
*)0)->pd
);
523 size_t pd_len
= sizeof(((struct xenfb_page
*)0)->pd
) / mfn_sz
;
524 size_t fb_pages
= pd_len
* XC_PAGE_SIZE
/ mfn_sz
;
525 size_t fb_len_max
= fb_pages
* XC_PAGE_SIZE
;
526 int max_width
, max_height
;
528 if (fb_len_lim
> fb_len_max
) {
529 xen_be_printf(&xenfb
->c
.xendev
, 0, "fb size limit %zu exceeds %zu, corrected\n",
530 fb_len_lim
, fb_len_max
);
531 fb_len_lim
= fb_len_max
;
533 if (fb_len_lim
&& fb_len
> fb_len_lim
) {
534 xen_be_printf(&xenfb
->c
.xendev
, 0, "frontend fb size %zu limited to %zu\n",
538 if (depth
!= 8 && depth
!= 16 && depth
!= 24 && depth
!= 32) {
539 xen_be_printf(&xenfb
->c
.xendev
, 0, "can't handle frontend fb depth %d\n",
543 if (row_stride
<= 0 || row_stride
> fb_len
) {
544 xen_be_printf(&xenfb
->c
.xendev
, 0, "invalid frontend stride %d\n", row_stride
);
547 max_width
= row_stride
/ (depth
/ 8);
548 if (width
< 0 || width
> max_width
) {
549 xen_be_printf(&xenfb
->c
.xendev
, 0, "invalid frontend width %d limited to %d\n",
553 if (offset
< 0 || offset
>= fb_len
) {
554 xen_be_printf(&xenfb
->c
.xendev
, 0, "invalid frontend offset %d (max %zu)\n",
558 max_height
= (fb_len
- offset
) / row_stride
;
559 if (height
< 0 || height
> max_height
) {
560 xen_be_printf(&xenfb
->c
.xendev
, 0, "invalid frontend height %d limited to %d\n",
564 xenfb
->fb_len
= fb_len
;
565 xenfb
->row_stride
= row_stride
;
566 xenfb
->depth
= depth
;
567 xenfb
->width
= width
;
568 xenfb
->height
= height
;
569 xenfb
->offset
= offset
;
570 xenfb
->up_fullscreen
= 1;
571 xenfb
->do_resize
= 1;
572 xen_be_printf(&xenfb
->c
.xendev
, 1, "framebuffer %dx%dx%d offset %d stride %d\n",
573 width
, height
, depth
, offset
, row_stride
);
577 /* A convenient function for munging pixels between different depths */
578 #define BLT(SRC_T,DST_T,RSB,GSB,BSB,RDB,GDB,BDB) \
579 for (line = y ; line < (y+h) ; line++) { \
580 SRC_T *src = (SRC_T *)(xenfb->pixels \
582 + (line * xenfb->row_stride) \
583 + (x * xenfb->depth / 8)); \
584 DST_T *dst = (DST_T *)(data \
585 + (line * linesize) \
588 const int RSS = 32 - (RSB + GSB + BSB); \
589 const int GSS = 32 - (GSB + BSB); \
590 const int BSS = 32 - (BSB); \
591 const uint32_t RSM = (~0U) << (32 - RSB); \
592 const uint32_t GSM = (~0U) << (32 - GSB); \
593 const uint32_t BSM = (~0U) << (32 - BSB); \
594 const int RDS = 32 - (RDB + GDB + BDB); \
595 const int GDS = 32 - (GDB + BDB); \
596 const int BDS = 32 - (BDB); \
597 const uint32_t RDM = (~0U) << (32 - RDB); \
598 const uint32_t GDM = (~0U) << (32 - GDB); \
599 const uint32_t BDM = (~0U) << (32 - BDB); \
600 for (col = x ; col < (x+w) ; col++) { \
601 uint32_t spix = *src; \
602 *dst = (((spix << RSS) & RSM & RDM) >> RDS) | \
603 (((spix << GSS) & GSM & GDM) >> GDS) | \
604 (((spix << BSS) & BSM & BDM) >> BDS); \
605 src = (SRC_T *) ((unsigned long) src + xenfb->depth / 8); \
606 dst = (DST_T *) ((unsigned long) dst + bpp / 8); \
612 * This copies data from the guest framebuffer region, into QEMU's
613 * displaysurface. qemu uses 16 or 32 bpp. In case the pv framebuffer
614 * uses something else we must convert and copy, otherwise we can
615 * supply the buffer directly and no thing here.
617 static void xenfb_guest_copy(struct XenFB
*xenfb
, int x
, int y
, int w
, int h
)
619 DisplaySurface
*surface
= qemu_console_surface(xenfb
->c
.con
);
621 int bpp
= surface_bits_per_pixel(surface
);
622 int linesize
= surface_stride(surface
);
623 uint8_t *data
= surface_data(surface
);
625 if (!is_buffer_shared(surface
)) {
626 switch (xenfb
->depth
) {
629 BLT(uint8_t, uint16_t, 3, 3, 2, 5, 6, 5);
630 } else if (bpp
== 32) {
631 BLT(uint8_t, uint32_t, 3, 3, 2, 8, 8, 8);
638 BLT(uint32_t, uint16_t, 8, 8, 8, 5, 6, 5);
639 } else if (bpp
== 32) {
640 BLT(uint32_t, uint32_t, 8, 8, 8, 8, 8, 8);
649 if (oops
) /* should not happen */
650 xen_be_printf(&xenfb
->c
.xendev
, 0, "%s: oops: convert %d -> %d bpp?\n",
651 __FUNCTION__
, xenfb
->depth
, bpp
);
653 dpy_gfx_update(xenfb
->c
.con
, x
, y
, w
, h
);
656 #ifdef XENFB_TYPE_REFRESH_PERIOD
657 static int xenfb_queue_full(struct XenFB
*xenfb
)
659 struct xenfb_page
*page
= xenfb
->c
.page
;
665 prod
= page
->in_prod
;
666 cons
= page
->in_cons
;
667 return prod
- cons
== XENFB_IN_RING_LEN
;
670 static void xenfb_send_event(struct XenFB
*xenfb
, union xenfb_in_event
*event
)
673 struct xenfb_page
*page
= xenfb
->c
.page
;
675 prod
= page
->in_prod
;
676 /* caller ensures !xenfb_queue_full() */
677 xen_mb(); /* ensure ring space available */
678 XENFB_IN_RING_REF(page
, prod
) = *event
;
679 xen_wmb(); /* ensure ring contents visible */
680 page
->in_prod
= prod
+ 1;
682 xen_be_send_notify(&xenfb
->c
.xendev
);
685 static void xenfb_send_refresh_period(struct XenFB
*xenfb
, int period
)
687 union xenfb_in_event event
;
689 memset(&event
, 0, sizeof(event
));
690 event
.type
= XENFB_TYPE_REFRESH_PERIOD
;
691 event
.refresh_period
.period
= period
;
692 xenfb_send_event(xenfb
, &event
);
697 * Periodic update of display.
698 * Also transmit the refresh interval to the frontend.
700 * Never ever do any qemu display operations
701 * (resize, screen update) outside this function.
702 * Our screen might be inactive. When asked for
703 * an update we know it is active.
705 static void xenfb_update(void *opaque
)
707 struct XenFB
*xenfb
= opaque
;
708 DisplaySurface
*surface
;
711 if (xenfb
->c
.xendev
.be_state
!= XenbusStateConnected
)
714 if (!xenfb
->feature_update
) {
715 /* we don't get update notifications, thus use the
716 * sledge hammer approach ... */
717 xenfb
->up_fullscreen
= 1;
720 /* resize if needed */
721 if (xenfb
->do_resize
) {
722 pixman_format_code_t format
;
724 xenfb
->do_resize
= 0;
725 switch (xenfb
->depth
) {
728 /* console.c supported depth -> buffer can be used directly */
729 format
= qemu_default_pixman_format(xenfb
->depth
, true);
730 surface
= qemu_create_displaysurface_from
731 (xenfb
->width
, xenfb
->height
, format
,
732 xenfb
->row_stride
, xenfb
->pixels
+ xenfb
->offset
);
735 /* we must convert stuff */
736 surface
= qemu_create_displaysurface(xenfb
->width
, xenfb
->height
);
739 dpy_gfx_replace_surface(xenfb
->c
.con
, surface
);
740 xen_be_printf(&xenfb
->c
.xendev
, 1, "update: resizing: %dx%d @ %d bpp%s\n",
741 xenfb
->width
, xenfb
->height
, xenfb
->depth
,
742 is_buffer_shared(surface
) ? " (shared)" : "");
743 xenfb
->up_fullscreen
= 1;
746 /* run queued updates */
747 if (xenfb
->up_fullscreen
) {
748 xen_be_printf(&xenfb
->c
.xendev
, 3, "update: fullscreen\n");
749 xenfb_guest_copy(xenfb
, 0, 0, xenfb
->width
, xenfb
->height
);
750 } else if (xenfb
->up_count
) {
751 xen_be_printf(&xenfb
->c
.xendev
, 3, "update: %d rects\n", xenfb
->up_count
);
752 for (i
= 0; i
< xenfb
->up_count
; i
++)
753 xenfb_guest_copy(xenfb
,
754 xenfb
->up_rects
[i
].x
,
755 xenfb
->up_rects
[i
].y
,
756 xenfb
->up_rects
[i
].w
,
757 xenfb
->up_rects
[i
].h
);
759 xen_be_printf(&xenfb
->c
.xendev
, 3, "update: nothing\n");
762 xenfb
->up_fullscreen
= 0;
765 static void xenfb_update_interval(void *opaque
, uint64_t interval
)
767 struct XenFB
*xenfb
= opaque
;
769 if (xenfb
->feature_update
) {
770 #ifdef XENFB_TYPE_REFRESH_PERIOD
771 if (xenfb_queue_full(xenfb
)) {
774 xenfb_send_refresh_period(xenfb
, interval
);
779 /* QEMU display state changed, so refresh the framebuffer copy */
780 static void xenfb_invalidate(void *opaque
)
782 struct XenFB
*xenfb
= opaque
;
783 xenfb
->up_fullscreen
= 1;
786 static void xenfb_handle_events(struct XenFB
*xenfb
)
788 uint32_t prod
, cons
, out_cons
;
789 struct xenfb_page
*page
= xenfb
->c
.page
;
791 prod
= page
->out_prod
;
792 out_cons
= page
->out_cons
;
793 if (prod
- out_cons
>= XENFB_OUT_RING_LEN
) {
796 xen_rmb(); /* ensure we see ring contents up to prod */
797 for (cons
= out_cons
; cons
!= prod
; cons
++) {
798 union xenfb_out_event
*event
= &XENFB_OUT_RING_REF(page
, cons
);
799 uint8_t type
= event
->type
;
803 case XENFB_TYPE_UPDATE
:
804 if (xenfb
->up_count
== UP_QUEUE
)
805 xenfb
->up_fullscreen
= 1;
806 if (xenfb
->up_fullscreen
)
808 x
= MAX(event
->update
.x
, 0);
809 y
= MAX(event
->update
.y
, 0);
810 w
= MIN(event
->update
.width
, xenfb
->width
- x
);
811 h
= MIN(event
->update
.height
, xenfb
->height
- y
);
812 if (w
< 0 || h
< 0) {
813 xen_be_printf(&xenfb
->c
.xendev
, 1, "bogus update ignored\n");
816 if (x
!= event
->update
.x
||
817 y
!= event
->update
.y
||
818 w
!= event
->update
.width
||
819 h
!= event
->update
.height
) {
820 xen_be_printf(&xenfb
->c
.xendev
, 1, "bogus update clipped\n");
822 if (w
== xenfb
->width
&& h
> xenfb
->height
/ 2) {
823 /* scroll detector: updated more than 50% of the lines,
824 * don't bother keeping track of the rectangles then */
825 xenfb
->up_fullscreen
= 1;
827 xenfb
->up_rects
[xenfb
->up_count
].x
= x
;
828 xenfb
->up_rects
[xenfb
->up_count
].y
= y
;
829 xenfb
->up_rects
[xenfb
->up_count
].w
= w
;
830 xenfb
->up_rects
[xenfb
->up_count
].h
= h
;
834 #ifdef XENFB_TYPE_RESIZE
835 case XENFB_TYPE_RESIZE
:
836 if (xenfb_configure_fb(xenfb
, xenfb
->fb_len
,
838 event
->resize
.height
,
841 event
->resize
.offset
,
842 event
->resize
.stride
) < 0)
844 xenfb_invalidate(xenfb
);
849 xen_mb(); /* ensure we're done with ring contents */
850 page
->out_cons
= cons
;
853 static int fb_init(struct XenDevice
*xendev
)
855 #ifdef XENFB_TYPE_RESIZE
856 xenstore_write_be_int(xendev
, "feature-resize", 1);
861 static int fb_initialise(struct XenDevice
*xendev
)
863 struct XenFB
*fb
= container_of(xendev
, struct XenFB
, c
.xendev
);
864 struct xenfb_page
*fb_page
;
868 if (xenstore_read_fe_int(xendev
, "videoram", &videoram
) == -1)
871 rc
= common_bind(&fb
->c
);
875 fb_page
= fb
->c
.page
;
876 rc
= xenfb_configure_fb(fb
, videoram
* 1024 * 1024U,
877 fb_page
->width
, fb_page
->height
, fb_page
->depth
,
878 fb_page
->mem_length
, 0, fb_page
->line_length
);
882 rc
= xenfb_map_fb(fb
);
886 #if 0 /* handled in xen_init_display() for now */
887 if (!fb
->have_console
) {
888 fb
->c
.ds
= graphic_console_init(xenfb_update
,
893 fb
->have_console
= 1;
897 if (xenstore_read_fe_int(xendev
, "feature-update", &fb
->feature_update
) == -1)
898 fb
->feature_update
= 0;
899 if (fb
->feature_update
)
900 xenstore_write_be_int(xendev
, "request-update", 1);
902 xen_be_printf(xendev
, 1, "feature-update=%d, videoram=%d\n",
903 fb
->feature_update
, videoram
);
907 static void fb_disconnect(struct XenDevice
*xendev
)
909 struct XenFB
*fb
= container_of(xendev
, struct XenFB
, c
.xendev
);
912 * FIXME: qemu can't un-init gfx display (yet?).
913 * Replacing the framebuffer with anonymous shared memory
914 * instead. This releases the guest pages and keeps qemu happy.
916 fb
->pixels
= mmap(fb
->pixels
, fb
->fbpages
* XC_PAGE_SIZE
,
917 PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANON
,
919 if (fb
->pixels
== MAP_FAILED
) {
920 xen_be_printf(xendev
, 0,
921 "Couldn't replace the framebuffer with anonymous memory errno=%d\n",
924 common_unbind(&fb
->c
);
925 fb
->feature_update
= 0;
929 static void fb_frontend_changed(struct XenDevice
*xendev
, const char *node
)
931 struct XenFB
*fb
= container_of(xendev
, struct XenFB
, c
.xendev
);
934 * Set state to Connected *again* once the frontend switched
935 * to connected. We must trigger the watch a second time to
936 * workaround a frontend bug.
938 if (fb
->bug_trigger
== 0 && strcmp(node
, "state") == 0 &&
939 xendev
->fe_state
== XenbusStateConnected
&&
940 xendev
->be_state
== XenbusStateConnected
) {
941 xen_be_printf(xendev
, 2, "re-trigger connected (frontend bug)\n");
942 xen_be_set_state(xendev
, XenbusStateConnected
);
943 fb
->bug_trigger
= 1; /* only once */
947 static void fb_event(struct XenDevice
*xendev
)
949 struct XenFB
*xenfb
= container_of(xendev
, struct XenFB
, c
.xendev
);
951 xenfb_handle_events(xenfb
);
952 xen_be_send_notify(&xenfb
->c
.xendev
);
955 /* -------------------------------------------------------------------- */
957 struct XenDevOps xen_kbdmouse_ops
= {
958 .size
= sizeof(struct XenInput
),
960 .initialise
= input_initialise
,
961 .connected
= input_connected
,
962 .disconnect
= input_disconnect
,
963 .event
= input_event
,
966 struct XenDevOps xen_framebuffer_ops
= {
967 .size
= sizeof(struct XenFB
),
969 .initialise
= fb_initialise
,
970 .disconnect
= fb_disconnect
,
972 .frontend_changed
= fb_frontend_changed
,
975 static const GraphicHwOps xenfb_ops
= {
976 .invalidate
= xenfb_invalidate
,
977 .gfx_update
= xenfb_update
,
978 .update_interval
= xenfb_update_interval
,
982 * FIXME/TODO: Kill this.
983 * Temporary needed while DisplayState reorganization is in flight.
985 void xen_init_display(int domid
)
987 struct XenDevice
*xfb
, *xin
;
994 main_loop_wait(true);
995 xfb
= xen_be_find_xendev("vfb", domid
, 0);
996 xin
= xen_be_find_xendev("vkbd", domid
, 0);
1002 xen_be_printf(NULL
, 1, "displaystate setup failed\n");
1007 fb
= container_of(xfb
, struct XenFB
, c
.xendev
);
1008 fb
->c
.con
= graphic_console_init(NULL
, 0, &xenfb_ops
, fb
);
1009 fb
->have_console
= 1;
1012 in
= container_of(xin
, struct XenInput
, c
.xendev
);
1013 in
->c
.con
= fb
->c
.con
;
1015 /* retry ->init() */
1016 xen_be_check_state(xin
);
1017 xen_be_check_state(xfb
);