![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to xenfb.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Qemu by Fabrice Bellard] / qemu / hw|
Return to xenfb.c CVS log | Up to [Qemu by Fabrice Bellard] / qemu / hw |
1.1 root 1: /*
2: * xen paravirt framebuffer backend
3: *
4: * Copyright IBM, Corp. 2005-2006
5: * Copyright Red Hat, Inc. 2006-2008
6: *
7: * Authors:
8: * Anthony Liguori <[email protected]>,
9: * Markus Armbruster <[email protected]>,
10: * Daniel P. Berrange <[email protected]>,
11: * Pat Campbell <[email protected]>,
12: * Gerd Hoffmann <[email protected]>
13: *
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.
17: *
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.
22: *
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/>.
25: */
26:
27: #include <stdarg.h>
28: #include <stdlib.h>
29: #include <sys/types.h>
30: #include <fcntl.h>
31: #include <unistd.h>
32: #include <sys/mman.h>
33: #include <errno.h>
34: #include <stdio.h>
35: #include <string.h>
36: #include <time.h>
37:
38: #include <xs.h>
39: #include <xenctrl.h>
40: #include <xen/event_channel.h>
41: #include <xen/io/xenbus.h>
42: #include <xen/io/fbif.h>
43: #include <xen/io/kbdif.h>
44: #include <xen/io/protocols.h>
45:
46: #include "hw.h"
47: #include "sysemu.h"
48: #include "console.h"
49: #include "qemu-char.h"
50: #include "xen_backend.h"
51:
52: #ifndef BTN_LEFT
53: #define BTN_LEFT 0x110 /* from <linux/input.h> */
54: #endif
55:
56: /* -------------------------------------------------------------------- */
57:
58: struct common {
59: struct XenDevice xendev; /* must be first */
60: void *page;
61: DisplayState *ds;
62: };
63:
64: struct XenInput {
65: struct common c;
66: int abs_pointer_wanted; /* Whether guest supports absolute pointer */
67: int button_state; /* Last seen pointer button state */
68: int extended;
69: QEMUPutMouseEntry *qmouse;
70: };
71:
72: #define UP_QUEUE 8
73:
74: struct XenFB {
75: struct common c;
76: size_t fb_len;
77: int row_stride;
78: int depth;
79: int width;
80: int height;
81: int offset;
82: void *pixels;
83: int fbpages;
84: int feature_update;
85: int refresh_period;
86: int bug_trigger;
87: int have_console;
88: int do_resize;
89:
90: struct {
91: int x,y,w,h;
92: } up_rects[UP_QUEUE];
93: int up_count;
94: int up_fullscreen;
95: };
96:
97: /* -------------------------------------------------------------------- */
98:
99: static int common_bind(struct common *c)
100: {
101: int mfn;
102:
103: if (xenstore_read_fe_int(&c->xendev, "page-ref", &mfn) == -1)
104: return -1;
105: if (xenstore_read_fe_int(&c->xendev, "event-channel", &c->xendev.remote_port) == -1)
106: return -1;
107:
108: c->page = xc_map_foreign_range(xen_xc, c->xendev.dom,
109: XC_PAGE_SIZE,
110: PROT_READ | PROT_WRITE, mfn);
111: if (c->page == NULL)
112: return -1;
113:
114: xen_be_bind_evtchn(&c->xendev);
115: xen_be_printf(&c->xendev, 1, "ring mfn %d, remote-port %d, local-port %d\n",
116: mfn, c->xendev.remote_port, c->xendev.local_port);
117:
118: return 0;
119: }
120:
121: static void common_unbind(struct common *c)
122: {
123: xen_be_unbind_evtchn(&c->xendev);
124: if (c->page) {
125: munmap(c->page, XC_PAGE_SIZE);
126: c->page = NULL;
127: }
128: }
129:
130: /* -------------------------------------------------------------------- */
131:
132: #if 0
133: /*
134: * These two tables are not needed any more, but left in here
135: * intentionally as documentation, to show how scancode2linux[]
136: * was generated.
137: *
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.
141: */
142: const unsigned char atkbd_set2_keycode[512] = {
143:
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,
152:
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,
161:
162: };
163:
164: const unsigned char atkbd_unxlate_table[128] = {
165:
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
174:
175: };
176: #endif
177:
178: /*
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];
182: * }
183: */
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,
193:
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,
202: };
203:
204: /* Send an event to the keyboard frontend driver */
205: static int xenfb_kbd_event(struct XenInput *xenfb,
206: union xenkbd_in_event *event)
207: {
208: struct xenkbd_page *page = xenfb->c.page;
209: uint32_t prod;
210:
211: if (xenfb->c.xendev.be_state != XenbusStateConnected)
212: return 0;
213: if (!page)
214: return 0;
215:
216: prod = page->in_prod;
217: if (prod - page->in_cons == XENKBD_IN_RING_LEN) {
218: errno = EAGAIN;
219: return -1;
220: }
221:
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);
227: }
228:
229: /* Send a keyboard (or mouse button) event */
230: static int xenfb_send_key(struct XenInput *xenfb, bool down, int keycode)
231: {
232: union xenkbd_in_event event;
233:
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;
238:
239: return xenfb_kbd_event(xenfb, &event);
240: }
241:
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)
245: {
246: union xenkbd_in_event event;
247:
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;
254: #endif
255:
256: return xenfb_kbd_event(xenfb, &event);
257: }
258:
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)
262: {
263: union xenkbd_in_event event;
264:
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
270: event.pos.abs_z = z;
271: #endif
272: #if __XEN_LATEST_INTERFACE_VERSION__ >= 0x00030208
273: event.pos.rel_z = z;
274: #endif
275:
276: return xenfb_kbd_event(xenfb, &event);
277: }
278:
279: /*
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.
283: *
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
288: * as needed.
289: *
290: * Wish we could just send scancodes straight to the guest which
291: * already has code for dealing with this...
292: */
293: static void xenfb_key_event(void *opaque, int scancode)
294: {
295: struct XenInput *xenfb = opaque;
296: int down = 1;
297:
298: if (scancode == 0xe0) {
299: xenfb->extended = 1;
300: return;
301: } else if (scancode & 0x80) {
302: scancode &= 0x7f;
303: down = 0;
304: }
305: if (xenfb->extended) {
306: scancode |= 0x80;
307: xenfb->extended = 0;
308: }
309: xenfb_send_key(xenfb, down, scancode2linux[scancode]);
310: }
311:
312: /*
313: * Send a mouse event from the client to the guest OS
314: *
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
319: * the button state.
320: */
321: static void xenfb_mouse_event(void *opaque,
322: int dx, int dy, int dz, int button_state)
323: {
324: struct XenInput *xenfb = opaque;
325: int dw = ds_get_width(xenfb->c.ds);
326: int dh = ds_get_height(xenfb->c.ds);
327: int i;
328:
329: if (xenfb->abs_pointer_wanted)
330: xenfb_send_position(xenfb,
331: dx * (dw - 1) / 0x7fff,
332: dy * (dh - 1) / 0x7fff,
333: dz);
334: else
335: xenfb_send_motion(xenfb, dx, dy, dz);
336:
337: for (i = 0 ; i < 8 ; i++) {
338: int lastDown = xenfb->button_state & (1 << i);
339: int down = button_state & (1 << i);
340: if (down == lastDown)
341: continue;
342:
343: if (xenfb_send_key(xenfb, down, BTN_LEFT+i) < 0)
344: return;
345: }
346: xenfb->button_state = button_state;
347: }
348:
349: static int input_init(struct XenDevice *xendev)
350: {
351: struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
352:
353: if (!in->c.ds) {
354: xen_be_printf(xendev, 1, "ds not set (yet)\n");
355: return -1;
356: }
357:
358: xenstore_write_be_int(xendev, "feature-abs-pointer", 1);
359: return 0;
360: }
361:
362: static int input_connect(struct XenDevice *xendev)
363: {
364: struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
365: int rc;
366:
367: if (xenstore_read_fe_int(xendev, "request-abs-pointer",
368: &in->abs_pointer_wanted) == -1)
369: in->abs_pointer_wanted = 0;
370:
371: rc = common_bind(&in->c);
372: if (rc != 0)
373: return rc;
374:
375: qemu_add_kbd_event_handler(xenfb_key_event, in);
376: in->qmouse = qemu_add_mouse_event_handler(xenfb_mouse_event, in,
377: in->abs_pointer_wanted,
378: "Xen PVFB Mouse");
379: return 0;
380: }
381:
382: static void input_disconnect(struct XenDevice *xendev)
383: {
384: struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
385:
386: if (in->qmouse) {
387: qemu_remove_mouse_event_handler(in->qmouse);
388: in->qmouse = NULL;
389: }
390: qemu_add_kbd_event_handler(NULL, NULL);
391: common_unbind(&in->c);
392: }
393:
394: static void input_event(struct XenDevice *xendev)
395: {
396: struct XenInput *xenfb = container_of(xendev, struct XenInput, c.xendev);
397: struct xenkbd_page *page = xenfb->c.page;
398:
399: /* We don't understand any keyboard events, so just ignore them. */
400: if (page->out_prod == page->out_cons)
401: return;
402: page->out_cons = page->out_prod;
403: xen_be_send_notify(&xenfb->c.xendev);
404: }
405:
406: /* -------------------------------------------------------------------- */
407:
408: static void xenfb_copy_mfns(int mode, int count, unsigned long *dst, void *src)
409: {
410: uint32_t *src32 = src;
411: uint64_t *src64 = src;
412: int i;
413:
414: for (i = 0; i < count; i++)
415: dst[i] = (mode == 32) ? src32[i] : src64[i];
416: }
417:
418: static int xenfb_map_fb(struct XenFB *xenfb)
419: {
420: struct xenfb_page *page = xenfb->c.page;
421: char *protocol = xenfb->c.xendev.protocol;
422: int n_fbdirs;
423: unsigned long *pgmfns = NULL;
424: unsigned long *fbmfns = NULL;
425: void *map, *pd;
426: int mode, ret = -1;
427:
428: /* default to native */
429: pd = page->pd;
430: mode = sizeof(unsigned long) * 8;
431:
432: if (!protocol) {
433: /*
434: * Undefined protocol, some guesswork needed.
435: *
436: * Old frontends which don't set the protocol use
437: * one page directory only, thus pd[1] must be zero.
438: * pd[1] of the 32bit struct layout and the lower
439: * 32 bits of pd[0] of the 64bit struct layout have
440: * the same location, so we can check that ...
441: */
442: uint32_t *ptr32 = NULL;
443: uint32_t *ptr64 = NULL;
444: #if defined(__i386__)
445: ptr32 = (void*)page->pd;
446: ptr64 = ((void*)page->pd) + 4;
447: #elif defined(__x86_64__)
448: ptr32 = ((void*)page->pd) - 4;
449: ptr64 = (void*)page->pd;
450: #endif
451: if (ptr32) {
452: if (ptr32[1] == 0) {
453: mode = 32;
454: pd = ptr32;
455: } else {
456: mode = 64;
457: pd = ptr64;
458: }
459: }
460: #if defined(__x86_64__)
461: } else if (strcmp(protocol, XEN_IO_PROTO_ABI_X86_32) == 0) {
462: /* 64bit dom0, 32bit domU */
463: mode = 32;
464: pd = ((void*)page->pd) - 4;
465: #elif defined(__i386__)
466: } else if (strcmp(protocol, XEN_IO_PROTO_ABI_X86_64) == 0) {
467: /* 32bit dom0, 64bit domU */
468: mode = 64;
469: pd = ((void*)page->pd) + 4;
470: #endif
471: }
472:
473: if (xenfb->pixels) {
474: munmap(xenfb->pixels, xenfb->fbpages * XC_PAGE_SIZE);
475: xenfb->pixels = NULL;
476: }
477:
478: xenfb->fbpages = (xenfb->fb_len + (XC_PAGE_SIZE - 1)) / XC_PAGE_SIZE;
479: n_fbdirs = xenfb->fbpages * mode / 8;
480: n_fbdirs = (n_fbdirs + (XC_PAGE_SIZE - 1)) / XC_PAGE_SIZE;
481:
482: pgmfns = qemu_mallocz(sizeof(unsigned long) * n_fbdirs);
483: fbmfns = qemu_mallocz(sizeof(unsigned long) * xenfb->fbpages);
484:
485: xenfb_copy_mfns(mode, n_fbdirs, pgmfns, pd);
486: map = xc_map_foreign_pages(xen_xc, xenfb->c.xendev.dom,
487: PROT_READ, pgmfns, n_fbdirs);
488: if (map == NULL)
489: goto out;
490: xenfb_copy_mfns(mode, xenfb->fbpages, fbmfns, map);
491: munmap(map, n_fbdirs * XC_PAGE_SIZE);
492:
493: xenfb->pixels = xc_map_foreign_pages(xen_xc, xenfb->c.xendev.dom,
494: PROT_READ | PROT_WRITE, fbmfns, xenfb->fbpages);
495: if (xenfb->pixels == NULL)
496: goto out;
497:
498: ret = 0; /* all is fine */
499:
500: out:
501: qemu_free(pgmfns);
502: qemu_free(fbmfns);
503: return ret;
504: }
505:
506: static int xenfb_configure_fb(struct XenFB *xenfb, size_t fb_len_lim,
507: int width, int height, int depth,
508: size_t fb_len, int offset, int row_stride)
509: {
510: size_t mfn_sz = sizeof(*((struct xenfb_page *)0)->pd);
511: size_t pd_len = sizeof(((struct xenfb_page *)0)->pd) / mfn_sz;
512: size_t fb_pages = pd_len * XC_PAGE_SIZE / mfn_sz;
513: size_t fb_len_max = fb_pages * XC_PAGE_SIZE;
514: int max_width, max_height;
515:
516: if (fb_len_lim > fb_len_max) {
517: xen_be_printf(&xenfb->c.xendev, 0, "fb size limit %zu exceeds %zu, corrected\n",
518: fb_len_lim, fb_len_max);
519: fb_len_lim = fb_len_max;
520: }
521: if (fb_len_lim && fb_len > fb_len_lim) {
522: xen_be_printf(&xenfb->c.xendev, 0, "frontend fb size %zu limited to %zu\n",
523: fb_len, fb_len_lim);
524: fb_len = fb_len_lim;
525: }
526: if (depth != 8 && depth != 16 && depth != 24 && depth != 32) {
527: xen_be_printf(&xenfb->c.xendev, 0, "can't handle frontend fb depth %d\n",
528: depth);
529: return -1;
530: }
531: if (row_stride <= 0 || row_stride > fb_len) {
532: xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend stride %d\n", row_stride);
533: return -1;
534: }
535: max_width = row_stride / (depth / 8);
536: if (width < 0 || width > max_width) {
537: xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend width %d limited to %d\n",
538: width, max_width);
539: width = max_width;
540: }
541: if (offset < 0 || offset >= fb_len) {
542: xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend offset %d (max %zu)\n",
543: offset, fb_len - 1);
544: return -1;
545: }
546: max_height = (fb_len - offset) / row_stride;
547: if (height < 0 || height > max_height) {
548: xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend height %d limited to %d\n",
549: height, max_height);
550: height = max_height;
551: }
552: xenfb->fb_len = fb_len;
553: xenfb->row_stride = row_stride;
554: xenfb->depth = depth;
555: xenfb->width = width;
556: xenfb->height = height;
557: xenfb->offset = offset;
558: xenfb->up_fullscreen = 1;
559: xenfb->do_resize = 1;
560: xen_be_printf(&xenfb->c.xendev, 1, "framebuffer %dx%dx%d offset %d stride %d\n",
561: width, height, depth, offset, row_stride);
562: return 0;
563: }
564:
565: /* A convenient function for munging pixels between different depths */
566: #define BLT(SRC_T,DST_T,RSB,GSB,BSB,RDB,GDB,BDB) \
567: for (line = y ; line < (y+h) ; line++) { \
568: SRC_T *src = (SRC_T *)(xenfb->pixels \
569: + xenfb->offset \
570: + (line * xenfb->row_stride) \
571: + (x * xenfb->depth / 8)); \
572: DST_T *dst = (DST_T *)(data \
573: + (line * linesize) \
574: + (x * bpp / 8)); \
575: int col; \
576: const int RSS = 32 - (RSB + GSB + BSB); \
577: const int GSS = 32 - (GSB + BSB); \
578: const int BSS = 32 - (BSB); \
579: const uint32_t RSM = (~0U) << (32 - RSB); \
580: const uint32_t GSM = (~0U) << (32 - GSB); \
581: const uint32_t BSM = (~0U) << (32 - BSB); \
582: const int RDS = 32 - (RDB + GDB + BDB); \
583: const int GDS = 32 - (GDB + BDB); \
584: const int BDS = 32 - (BDB); \
585: const uint32_t RDM = (~0U) << (32 - RDB); \
586: const uint32_t GDM = (~0U) << (32 - GDB); \
587: const uint32_t BDM = (~0U) << (32 - BDB); \
588: for (col = x ; col < (x+w) ; col++) { \
589: uint32_t spix = *src; \
590: *dst = (((spix << RSS) & RSM & RDM) >> RDS) | \
591: (((spix << GSS) & GSM & GDM) >> GDS) | \
592: (((spix << BSS) & BSM & BDM) >> BDS); \
593: src = (SRC_T *) ((unsigned long) src + xenfb->depth / 8); \
594: dst = (DST_T *) ((unsigned long) dst + bpp / 8); \
595: } \
596: }
597:
598:
599: /*
600: * This copies data from the guest framebuffer region, into QEMU's
601: * displaysurface. qemu uses 16 or 32 bpp. In case the pv framebuffer
602: * uses something else we must convert and copy, otherwise we can
603: * supply the buffer directly and no thing here.
604: */
605: static void xenfb_guest_copy(struct XenFB *xenfb, int x, int y, int w, int h)
606: {
607: int line, oops = 0;
608: int bpp = ds_get_bits_per_pixel(xenfb->c.ds);
609: int linesize = ds_get_linesize(xenfb->c.ds);
610: uint8_t *data = ds_get_data(xenfb->c.ds);
611:
612: if (!is_buffer_shared(xenfb->c.ds->surface)) {
613: switch (xenfb->depth) {
614: case 8:
615: if (bpp == 16) {
616: BLT(uint8_t, uint16_t, 3, 3, 2, 5, 6, 5);
617: } else if (bpp == 32) {
618: BLT(uint8_t, uint32_t, 3, 3, 2, 8, 8, 8);
619: } else {
620: oops = 1;
621: }
622: break;
623: case 24:
624: if (bpp == 16) {
625: BLT(uint32_t, uint16_t, 8, 8, 8, 5, 6, 5);
626: } else if (bpp == 32) {
627: BLT(uint32_t, uint32_t, 8, 8, 8, 8, 8, 8);
628: } else {
629: oops = 1;
630: }
631: break;
632: default:
633: oops = 1;
634: }
635: }
636: if (oops) /* should not happen */
637: xen_be_printf(&xenfb->c.xendev, 0, "%s: oops: convert %d -> %d bpp?\n",
638: __FUNCTION__, xenfb->depth, bpp);
639:
640: dpy_update(xenfb->c.ds, x, y, w, h);
641: }
642:
643: #ifdef XENFB_TYPE_REFRESH_PERIOD
644: static int xenfb_queue_full(struct XenFB *xenfb)
645: {
646: struct xenfb_page *page = xenfb->c.page;
647: uint32_t cons, prod;
648:
649: if (!page)
650: return 1;
651:
652: prod = page->in_prod;
653: cons = page->in_cons;
654: return prod - cons == XENFB_IN_RING_LEN;
655: }
656:
657: static void xenfb_send_event(struct XenFB *xenfb, union xenfb_in_event *event)
658: {
659: uint32_t prod;
660: struct xenfb_page *page = xenfb->c.page;
661:
662: prod = page->in_prod;
663: /* caller ensures !xenfb_queue_full() */
664: xen_mb(); /* ensure ring space available */
665: XENFB_IN_RING_REF(page, prod) = *event;
666: xen_wmb(); /* ensure ring contents visible */
667: page->in_prod = prod + 1;
668:
669: xen_be_send_notify(&xenfb->c.xendev);
670: }
671:
672: static void xenfb_send_refresh_period(struct XenFB *xenfb, int period)
673: {
674: union xenfb_in_event event;
675:
676: memset(&event, 0, sizeof(event));
677: event.type = XENFB_TYPE_REFRESH_PERIOD;
678: event.refresh_period.period = period;
679: xenfb_send_event(xenfb, &event);
680: }
681: #endif
682:
683: /*
684: * Periodic update of display.
685: * Also transmit the refresh interval to the frontend.
686: *
687: * Never ever do any qemu display operations
688: * (resize, screen update) outside this function.
689: * Our screen might be inactive. When asked for
690: * an update we know it is active.
691: */
692: static void xenfb_update(void *opaque)
693: {
694: struct XenFB *xenfb = opaque;
695: int i;
696:
697: if (xenfb->c.xendev.be_state != XenbusStateConnected)
698: return;
699:
700: if (xenfb->feature_update) {
701: #ifdef XENFB_TYPE_REFRESH_PERIOD
702: struct DisplayChangeListener *l;
703: int period = 99999999;
704: int idle = 1;
705:
706: if (xenfb_queue_full(xenfb))
707: return;
708:
709: for (l = xenfb->c.ds->listeners; l != NULL; l = l->next) {
710: if (l->idle)
711: continue;
712: idle = 0;
713: if (!l->gui_timer_interval) {
714: if (period > GUI_REFRESH_INTERVAL)
715: period = GUI_REFRESH_INTERVAL;
716: } else {
717: if (period > l->gui_timer_interval)
718: period = l->gui_timer_interval;
719: }
720: }
721: if (idle)
722: period = XENFB_NO_REFRESH;
723:
724: if (xenfb->refresh_period != period) {
725: xenfb_send_refresh_period(xenfb, period);
726: xenfb->refresh_period = period;
727: xen_be_printf(&xenfb->c.xendev, 1, "refresh period: %d\n", period);
728: }
729: #else
730: ; /* nothing */
731: #endif
732: } else {
733: /* we don't get update notifications, thus use the
734: * sledge hammer approach ... */
735: xenfb->up_fullscreen = 1;
736: }
737:
738: /* resize if needed */
739: if (xenfb->do_resize) {
740: xenfb->do_resize = 0;
741: switch (xenfb->depth) {
742: case 16:
743: case 32:
744: /* console.c supported depth -> buffer can be used directly */
745: qemu_free_displaysurface(xenfb->c.ds);
746: xenfb->c.ds->surface = qemu_create_displaysurface_from
747: (xenfb->width, xenfb->height, xenfb->depth,
748: xenfb->row_stride, xenfb->pixels + xenfb->offset);
749: break;
750: default:
751: /* we must convert stuff */
752: qemu_resize_displaysurface(xenfb->c.ds, xenfb->width, xenfb->height);
753: break;
754: }
755: xen_be_printf(&xenfb->c.xendev, 1, "update: resizing: %dx%d @ %d bpp%s\n",
756: xenfb->width, xenfb->height, xenfb->depth,
757: is_buffer_shared(xenfb->c.ds->surface) ? " (shared)" : "");
758: dpy_resize(xenfb->c.ds);
759: xenfb->up_fullscreen = 1;
760: }
761:
762: /* run queued updates */
763: if (xenfb->up_fullscreen) {
764: xen_be_printf(&xenfb->c.xendev, 3, "update: fullscreen\n");
765: xenfb_guest_copy(xenfb, 0, 0, xenfb->width, xenfb->height);
766: } else if (xenfb->up_count) {
767: xen_be_printf(&xenfb->c.xendev, 3, "update: %d rects\n", xenfb->up_count);
768: for (i = 0; i < xenfb->up_count; i++)
769: xenfb_guest_copy(xenfb,
770: xenfb->up_rects[i].x,
771: xenfb->up_rects[i].y,
772: xenfb->up_rects[i].w,
773: xenfb->up_rects[i].h);
774: } else {
775: xen_be_printf(&xenfb->c.xendev, 3, "update: nothing\n");
776: }
777: xenfb->up_count = 0;
778: xenfb->up_fullscreen = 0;
779: }
780:
781: /* QEMU display state changed, so refresh the framebuffer copy */
782: static void xenfb_invalidate(void *opaque)
783: {
784: struct XenFB *xenfb = opaque;
785: xenfb->up_fullscreen = 1;
786: }
787:
788: static void xenfb_handle_events(struct XenFB *xenfb)
789: {
790: uint32_t prod, cons;
791: struct xenfb_page *page = xenfb->c.page;
792:
793: prod = page->out_prod;
794: if (prod == page->out_cons)
795: return;
796: xen_rmb(); /* ensure we see ring contents up to prod */
797: for (cons = page->out_cons; cons != prod; cons++) {
798: union xenfb_out_event *event = &XENFB_OUT_RING_REF(page, cons);
799: int x, y, w, h;
800:
801: switch (event->type) {
802: case XENFB_TYPE_UPDATE:
803: if (xenfb->up_count == UP_QUEUE)
804: xenfb->up_fullscreen = 1;
805: if (xenfb->up_fullscreen)
806: break;
807: x = MAX(event->update.x, 0);
808: y = MAX(event->update.y, 0);
809: w = MIN(event->update.width, xenfb->width - x);
810: h = MIN(event->update.height, xenfb->height - y);
811: if (w < 0 || h < 0) {
812: xen_be_printf(&xenfb->c.xendev, 1, "bogus update ignored\n");
813: break;
814: }
815: if (x != event->update.x ||
816: y != event->update.y ||
817: w != event->update.width ||
818: h != event->update.height) {
819: xen_be_printf(&xenfb->c.xendev, 1, "bogus update clipped\n");
820: }
821: if (w == xenfb->width && h > xenfb->height / 2) {
822: /* scroll detector: updated more than 50% of the lines,
823: * don't bother keeping track of the rectangles then */
824: xenfb->up_fullscreen = 1;
825: } else {
826: xenfb->up_rects[xenfb->up_count].x = x;
827: xenfb->up_rects[xenfb->up_count].y = y;
828: xenfb->up_rects[xenfb->up_count].w = w;
829: xenfb->up_rects[xenfb->up_count].h = h;
830: xenfb->up_count++;
831: }
832: break;
833: #ifdef XENFB_TYPE_RESIZE
834: case XENFB_TYPE_RESIZE:
835: if (xenfb_configure_fb(xenfb, xenfb->fb_len,
836: event->resize.width,
837: event->resize.height,
838: event->resize.depth,
839: xenfb->fb_len,
840: event->resize.offset,
841: event->resize.stride) < 0)
842: break;
843: xenfb_invalidate(xenfb);
844: break;
845: #endif
846: }
847: }
848: xen_mb(); /* ensure we're done with ring contents */
849: page->out_cons = cons;
850: }
851:
852: static int fb_init(struct XenDevice *xendev)
853: {
854: struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
855:
856: fb->refresh_period = -1;
857:
858: #ifdef XENFB_TYPE_RESIZE
859: xenstore_write_be_int(xendev, "feature-resize", 1);
860: #endif
861: return 0;
862: }
863:
864: static int fb_connect(struct XenDevice *xendev)
865: {
866: struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
867: struct xenfb_page *fb_page;
868: int videoram;
869: int rc;
870:
871: if (xenstore_read_fe_int(xendev, "videoram", &videoram) == -1)
872: videoram = 0;
873:
874: rc = common_bind(&fb->c);
875: if (rc != 0)
876: return rc;
877:
878: fb_page = fb->c.page;
879: rc = xenfb_configure_fb(fb, videoram * 1024 * 1024U,
880: fb_page->width, fb_page->height, fb_page->depth,
881: fb_page->mem_length, 0, fb_page->line_length);
882: if (rc != 0)
883: return rc;
884:
885: rc = xenfb_map_fb(fb);
886: if (rc != 0)
887: return rc;
888:
889: #if 0 /* handled in xen_init_display() for now */
890: if (!fb->have_console) {
891: fb->c.ds = graphic_console_init(xenfb_update,
892: xenfb_invalidate,
893: NULL,
894: NULL,
895: fb);
896: fb->have_console = 1;
897: }
898: #endif
899:
900: if (xenstore_read_fe_int(xendev, "feature-update", &fb->feature_update) == -1)
901: fb->feature_update = 0;
902: if (fb->feature_update)
903: xenstore_write_be_int(xendev, "request-update", 1);
904:
905: xen_be_printf(xendev, 1, "feature-update=%d, videoram=%d\n",
906: fb->feature_update, videoram);
907: return 0;
908: }
909:
910: static void fb_disconnect(struct XenDevice *xendev)
911: {
912: struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
913:
914: /*
915: * FIXME: qemu can't un-init gfx display (yet?).
916: * Replacing the framebuffer with anonymous shared memory
917: * instead. This releases the guest pages and keeps qemu happy.
918: */
919: fb->pixels = mmap(fb->pixels, fb->fbpages * XC_PAGE_SIZE,
920: PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANON,
921: -1, 0);
922: common_unbind(&fb->c);
923: fb->feature_update = 0;
924: fb->bug_trigger = 0;
925: }
926:
927: static void fb_frontend_changed(struct XenDevice *xendev, const char *node)
928: {
929: struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
930:
931: /*
932: * Set state to Connected *again* once the frontend switched
933: * to connected. We must trigger the watch a second time to
934: * workaround a frontend bug.
935: */
936: if (fb->bug_trigger == 0 && strcmp(node, "state") == 0 &&
937: xendev->fe_state == XenbusStateConnected &&
938: xendev->be_state == XenbusStateConnected) {
939: xen_be_printf(xendev, 2, "re-trigger connected (frontend bug)\n");
940: xen_be_set_state(xendev, XenbusStateConnected);
941: fb->bug_trigger = 1; /* only once */
942: }
943: }
944:
945: static void fb_event(struct XenDevice *xendev)
946: {
947: struct XenFB *xenfb = container_of(xendev, struct XenFB, c.xendev);
948:
949: xenfb_handle_events(xenfb);
950: xen_be_send_notify(&xenfb->c.xendev);
951: }
952:
953: /* -------------------------------------------------------------------- */
954:
955: struct XenDevOps xen_kbdmouse_ops = {
956: .size = sizeof(struct XenInput),
957: .init = input_init,
958: .connect = input_connect,
959: .disconnect = input_disconnect,
960: .event = input_event,
961: };
962:
963: struct XenDevOps xen_framebuffer_ops = {
964: .size = sizeof(struct XenFB),
965: .init = fb_init,
966: .connect = fb_connect,
967: .disconnect = fb_disconnect,
968: .event = fb_event,
969: .frontend_changed = fb_frontend_changed,
970: };
971:
972: /*
973: * FIXME/TODO: Kill this.
974: * Temporary needed while DisplayState reorganization is in flight.
975: */
976: void xen_init_display(int domid)
977: {
978: struct XenDevice *xfb, *xin;
979: struct XenFB *fb;
980: struct XenInput *in;
981: int i = 0;
982:
983: wait_more:
984: i++;
1.1.1.2 ! root 985: main_loop_wait(true);
1.1 root 986: xfb = xen_be_find_xendev("vfb", domid, 0);
987: xin = xen_be_find_xendev("vkbd", domid, 0);
988: if (!xfb || !xin) {
1.1.1.2 ! root 989: if (i < 256) {
! 990: usleep(10000);
1.1 root 991: goto wait_more;
1.1.1.2 ! root 992: }
1.1 root 993: xen_be_printf(NULL, 1, "displaystate setup failed\n");
994: return;
995: }
996:
997: /* vfb */
998: fb = container_of(xfb, struct XenFB, c.xendev);
999: fb->c.ds = graphic_console_init(xenfb_update,
1000: xenfb_invalidate,
1001: NULL,
1002: NULL,
1003: fb);
1004: fb->have_console = 1;
1005:
1006: /* vkbd */
1007: in = container_of(xin, struct XenInput, c.xendev);
1008: in->c.ds = fb->c.ds;
1009:
1010: /* retry ->init() */
1011: xen_be_check_state(xin);
1012: xen_be_check_state(xfb);
1013: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.