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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 <stdbool.h>
33: #include <sys/mman.h>
34: #include <errno.h>
35: #include <stdio.h>
36: #include <string.h>
37: #include <time.h>
38:
39: #include <xs.h>
40: #include <xenctrl.h>
41: #include <xen/event_channel.h>
42: #include <xen/io/xenbus.h>
43: #include <xen/io/fbif.h>
44: #include <xen/io/kbdif.h>
45: #include <xen/io/protocols.h>
46:
47: #include "hw.h"
48: #include "sysemu.h"
49: #include "console.h"
50: #include "qemu-char.h"
51: #include "xen_backend.h"
52:
53: #ifndef BTN_LEFT
54: #define BTN_LEFT 0x110 /* from <linux/input.h> */
55: #endif
56:
57: /* -------------------------------------------------------------------- */
58:
59: struct common {
60: struct XenDevice xendev; /* must be first */
61: void *page;
62: DisplayState *ds;
63: };
64:
65: struct XenInput {
66: struct common c;
67: int abs_pointer_wanted; /* Whether guest supports absolute pointer */
68: int button_state; /* Last seen pointer button state */
69: int extended;
70: QEMUPutMouseEntry *qmouse;
71: };
72:
73: #define UP_QUEUE 8
74:
75: struct XenFB {
76: struct common c;
77: size_t fb_len;
78: int row_stride;
79: int depth;
80: int width;
81: int height;
82: int offset;
83: void *pixels;
84: int fbpages;
85: int feature_update;
86: int refresh_period;
87: int bug_trigger;
88: int have_console;
89: int do_resize;
90:
91: struct {
92: int x,y,w,h;
93: } up_rects[UP_QUEUE];
94: int up_count;
95: int up_fullscreen;
96: };
97:
98: /* -------------------------------------------------------------------- */
99:
100: static int common_bind(struct common *c)
101: {
102: int mfn;
103:
104: if (xenstore_read_fe_int(&c->xendev, "page-ref", &mfn) == -1)
105: return -1;
106: if (xenstore_read_fe_int(&c->xendev, "event-channel", &c->xendev.remote_port) == -1)
107: return -1;
108:
109: c->page = xc_map_foreign_range(xen_xc, c->xendev.dom,
110: XC_PAGE_SIZE,
111: PROT_READ | PROT_WRITE, mfn);
112: if (c->page == NULL)
113: return -1;
114:
115: xen_be_bind_evtchn(&c->xendev);
116: xen_be_printf(&c->xendev, 1, "ring mfn %d, remote-port %d, local-port %d\n",
117: mfn, c->xendev.remote_port, c->xendev.local_port);
118:
119: return 0;
120: }
121:
122: static void common_unbind(struct common *c)
123: {
124: xen_be_unbind_evtchn(&c->xendev);
125: if (c->page) {
126: munmap(c->page, XC_PAGE_SIZE);
127: c->page = NULL;
128: }
129: }
130:
131: /* -------------------------------------------------------------------- */
132:
133: #if 0
134: /*
135: * These two tables are not needed any more, but left in here
136: * intentionally as documentation, to show how scancode2linux[]
137: * was generated.
138: *
139: * Tables to map from scancode to Linux input layer keycode.
140: * Scancodes are hardware-specific. These maps assumes a
141: * standard AT or PS/2 keyboard which is what QEMU feeds us.
142: */
143: const unsigned char atkbd_set2_keycode[512] = {
144:
145: 0, 67, 65, 63, 61, 59, 60, 88, 0, 68, 66, 64, 62, 15, 41,117,
146: 0, 56, 42, 93, 29, 16, 2, 0, 0, 0, 44, 31, 30, 17, 3, 0,
147: 0, 46, 45, 32, 18, 5, 4, 95, 0, 57, 47, 33, 20, 19, 6,183,
148: 0, 49, 48, 35, 34, 21, 7,184, 0, 0, 50, 36, 22, 8, 9,185,
149: 0, 51, 37, 23, 24, 11, 10, 0, 0, 52, 53, 38, 39, 25, 12, 0,
150: 0, 89, 40, 0, 26, 13, 0, 0, 58, 54, 28, 27, 0, 43, 0, 85,
151: 0, 86, 91, 90, 92, 0, 14, 94, 0, 79,124, 75, 71,121, 0, 0,
152: 82, 83, 80, 76, 77, 72, 1, 69, 87, 78, 81, 74, 55, 73, 70, 99,
153:
154: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
155: 217,100,255, 0, 97,165, 0, 0,156, 0, 0, 0, 0, 0, 0,125,
156: 173,114, 0,113, 0, 0, 0,126,128, 0, 0,140, 0, 0, 0,127,
157: 159, 0,115, 0,164, 0, 0,116,158, 0,150,166, 0, 0, 0,142,
158: 157, 0, 0, 0, 0, 0, 0, 0,155, 0, 98, 0, 0,163, 0, 0,
159: 226, 0, 0, 0, 0, 0, 0, 0, 0,255, 96, 0, 0, 0,143, 0,
160: 0, 0, 0, 0, 0, 0, 0, 0, 0,107, 0,105,102, 0, 0,112,
161: 110,111,108,112,106,103, 0,119, 0,118,109, 0, 99,104,119, 0,
162:
163: };
164:
165: const unsigned char atkbd_unxlate_table[128] = {
166:
167: 0,118, 22, 30, 38, 37, 46, 54, 61, 62, 70, 69, 78, 85,102, 13,
168: 21, 29, 36, 45, 44, 53, 60, 67, 68, 77, 84, 91, 90, 20, 28, 27,
169: 35, 43, 52, 51, 59, 66, 75, 76, 82, 14, 18, 93, 26, 34, 33, 42,
170: 50, 49, 58, 65, 73, 74, 89,124, 17, 41, 88, 5, 6, 4, 12, 3,
171: 11, 2, 10, 1, 9,119,126,108,117,125,123,107,115,116,121,105,
172: 114,122,112,113,127, 96, 97,120, 7, 15, 23, 31, 39, 47, 55, 63,
173: 71, 79, 86, 94, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 87,111,
174: 19, 25, 57, 81, 83, 92, 95, 98, 99,100,101,103,104,106,109,110
175:
176: };
177: #endif
178:
179: /*
180: * for (i = 0; i < 128; i++) {
181: * scancode2linux[i] = atkbd_set2_keycode[atkbd_unxlate_table[i]];
182: * scancode2linux[i | 0x80] = atkbd_set2_keycode[atkbd_unxlate_table[i] | 0x80];
183: * }
184: */
185: static const unsigned char scancode2linux[512] = {
186: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
187: 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
188: 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
189: 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
190: 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
191: 80, 81, 82, 83, 99, 0, 86, 87, 88,117, 0, 0, 95,183,184,185,
192: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
193: 93, 0, 0, 89, 0, 0, 85, 91, 90, 92, 0, 94, 0,124,121, 0,
194:
195: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
196: 165, 0, 0, 0, 0, 0, 0, 0, 0,163, 0, 0, 96, 97, 0, 0,
197: 113,140,164, 0,166, 0, 0, 0, 0, 0,255, 0, 0, 0,114, 0,
198: 115, 0,150, 0, 0, 98,255, 99,100, 0, 0, 0, 0, 0, 0, 0,
199: 0, 0, 0, 0, 0,119,119,102,103,104, 0,105,112,106,118,107,
200: 108,109,110,111, 0, 0, 0, 0, 0, 0, 0,125,126,127,116,142,
201: 0, 0, 0,143, 0,217,156,173,128,159,158,157,155,226, 0,112,
202: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
203: };
204:
205: /* Send an event to the keyboard frontend driver */
206: static int xenfb_kbd_event(struct XenInput *xenfb,
207: union xenkbd_in_event *event)
208: {
209: struct xenkbd_page *page = xenfb->c.page;
210: uint32_t prod;
211:
212: if (xenfb->c.xendev.be_state != XenbusStateConnected)
213: return 0;
214: if (!page)
215: return 0;
216:
217: prod = page->in_prod;
218: if (prod - page->in_cons == XENKBD_IN_RING_LEN) {
219: errno = EAGAIN;
220: return -1;
221: }
222:
223: xen_mb(); /* ensure ring space available */
224: XENKBD_IN_RING_REF(page, prod) = *event;
225: xen_wmb(); /* ensure ring contents visible */
226: page->in_prod = prod + 1;
227: return xen_be_send_notify(&xenfb->c.xendev);
228: }
229:
230: /* Send a keyboard (or mouse button) event */
231: static int xenfb_send_key(struct XenInput *xenfb, bool down, int keycode)
232: {
233: union xenkbd_in_event event;
234:
235: memset(&event, 0, XENKBD_IN_EVENT_SIZE);
236: event.type = XENKBD_TYPE_KEY;
237: event.key.pressed = down ? 1 : 0;
238: event.key.keycode = keycode;
239:
240: return xenfb_kbd_event(xenfb, &event);
241: }
242:
243: /* Send a relative mouse movement event */
244: static int xenfb_send_motion(struct XenInput *xenfb,
245: int rel_x, int rel_y, int rel_z)
246: {
247: union xenkbd_in_event event;
248:
249: memset(&event, 0, XENKBD_IN_EVENT_SIZE);
250: event.type = XENKBD_TYPE_MOTION;
251: event.motion.rel_x = rel_x;
252: event.motion.rel_y = rel_y;
253: #if __XEN_LATEST_INTERFACE_VERSION__ >= 0x00030207
254: event.motion.rel_z = rel_z;
255: #endif
256:
257: return xenfb_kbd_event(xenfb, &event);
258: }
259:
260: /* Send an absolute mouse movement event */
261: static int xenfb_send_position(struct XenInput *xenfb,
262: int abs_x, int abs_y, int z)
263: {
264: union xenkbd_in_event event;
265:
266: memset(&event, 0, XENKBD_IN_EVENT_SIZE);
267: event.type = XENKBD_TYPE_POS;
268: event.pos.abs_x = abs_x;
269: event.pos.abs_y = abs_y;
270: #if __XEN_LATEST_INTERFACE_VERSION__ == 0x00030207
271: event.pos.abs_z = z;
272: #endif
273: #if __XEN_LATEST_INTERFACE_VERSION__ >= 0x00030208
274: event.pos.rel_z = z;
275: #endif
276:
277: return xenfb_kbd_event(xenfb, &event);
278: }
279:
280: /*
281: * Send a key event from the client to the guest OS
282: * QEMU gives us a raw scancode from an AT / PS/2 style keyboard.
283: * We have to turn this into a Linux Input layer keycode.
284: *
285: * Extra complexity from the fact that with extended scancodes
286: * (like those produced by arrow keys) this method gets called
287: * twice, but we only want to send a single event. So we have to
288: * track the '0xe0' scancode state & collapse the extended keys
289: * as needed.
290: *
291: * Wish we could just send scancodes straight to the guest which
292: * already has code for dealing with this...
293: */
294: static void xenfb_key_event(void *opaque, int scancode)
295: {
296: struct XenInput *xenfb = opaque;
297: int down = 1;
298:
299: if (scancode == 0xe0) {
300: xenfb->extended = 1;
301: return;
302: } else if (scancode & 0x80) {
303: scancode &= 0x7f;
304: down = 0;
305: }
306: if (xenfb->extended) {
307: scancode |= 0x80;
308: xenfb->extended = 0;
309: }
310: xenfb_send_key(xenfb, down, scancode2linux[scancode]);
311: }
312:
313: /*
314: * Send a mouse event from the client to the guest OS
315: *
316: * The QEMU mouse can be in either relative, or absolute mode.
317: * Movement is sent separately from button state, which has to
318: * be encoded as virtual key events. We also don't actually get
319: * given any button up/down events, so have to track changes in
320: * the button state.
321: */
322: static void xenfb_mouse_event(void *opaque,
323: int dx, int dy, int dz, int button_state)
324: {
325: struct XenInput *xenfb = opaque;
326: int dw = ds_get_width(xenfb->c.ds);
327: int dh = ds_get_height(xenfb->c.ds);
328: int i;
329:
330: if (xenfb->abs_pointer_wanted)
331: xenfb_send_position(xenfb,
332: dx * (dw - 1) / 0x7fff,
333: dy * (dh - 1) / 0x7fff,
334: dz);
335: else
336: xenfb_send_motion(xenfb, dx, dy, dz);
337:
338: for (i = 0 ; i < 8 ; i++) {
339: int lastDown = xenfb->button_state & (1 << i);
340: int down = button_state & (1 << i);
341: if (down == lastDown)
342: continue;
343:
344: if (xenfb_send_key(xenfb, down, BTN_LEFT+i) < 0)
345: return;
346: }
347: xenfb->button_state = button_state;
348: }
349:
350: static int input_init(struct XenDevice *xendev)
351: {
352: struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
353:
354: if (!in->c.ds) {
355: xen_be_printf(xendev, 1, "ds not set (yet)\n");
356: return -1;
357: }
358:
359: xenstore_write_be_int(xendev, "feature-abs-pointer", 1);
360: return 0;
361: }
362:
363: static int input_connect(struct XenDevice *xendev)
364: {
365: struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
366: int rc;
367:
368: if (xenstore_read_fe_int(xendev, "request-abs-pointer",
369: &in->abs_pointer_wanted) == -1)
370: in->abs_pointer_wanted = 0;
371:
372: rc = common_bind(&in->c);
373: if (rc != 0)
374: return rc;
375:
376: qemu_add_kbd_event_handler(xenfb_key_event, in);
377: in->qmouse = qemu_add_mouse_event_handler(xenfb_mouse_event, in,
378: in->abs_pointer_wanted,
379: "Xen PVFB Mouse");
380: return 0;
381: }
382:
383: static void input_disconnect(struct XenDevice *xendev)
384: {
385: struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
386:
387: if (in->qmouse) {
388: qemu_remove_mouse_event_handler(in->qmouse);
389: in->qmouse = NULL;
390: }
391: qemu_add_kbd_event_handler(NULL, NULL);
392: common_unbind(&in->c);
393: }
394:
395: static void input_event(struct XenDevice *xendev)
396: {
397: struct XenInput *xenfb = container_of(xendev, struct XenInput, c.xendev);
398: struct xenkbd_page *page = xenfb->c.page;
399:
400: /* We don't understand any keyboard events, so just ignore them. */
401: if (page->out_prod == page->out_cons)
402: return;
403: page->out_cons = page->out_prod;
404: xen_be_send_notify(&xenfb->c.xendev);
405: }
406:
407: /* -------------------------------------------------------------------- */
408:
409: static void xenfb_copy_mfns(int mode, int count, unsigned long *dst, void *src)
410: {
411: uint32_t *src32 = src;
412: uint64_t *src64 = src;
413: int i;
414:
415: for (i = 0; i < count; i++)
416: dst[i] = (mode == 32) ? src32[i] : src64[i];
417: }
418:
419: static int xenfb_map_fb(struct XenFB *xenfb)
420: {
421: struct xenfb_page *page = xenfb->c.page;
422: char *protocol = xenfb->c.xendev.protocol;
423: int n_fbdirs;
424: unsigned long *pgmfns = NULL;
425: unsigned long *fbmfns = NULL;
426: void *map, *pd;
427: int mode, ret = -1;
428:
429: /* default to native */
430: pd = page->pd;
431: mode = sizeof(unsigned long) * 8;
432:
433: if (!protocol) {
434: /*
435: * Undefined protocol, some guesswork needed.
436: *
437: * Old frontends which don't set the protocol use
438: * one page directory only, thus pd[1] must be zero.
439: * pd[1] of the 32bit struct layout and the lower
440: * 32 bits of pd[0] of the 64bit struct layout have
441: * the same location, so we can check that ...
442: */
443: uint32_t *ptr32 = NULL;
444: uint32_t *ptr64 = NULL;
445: #if defined(__i386__)
446: ptr32 = (void*)page->pd;
447: ptr64 = ((void*)page->pd) + 4;
448: #elif defined(__x86_64__)
449: ptr32 = ((void*)page->pd) - 4;
450: ptr64 = (void*)page->pd;
451: #endif
452: if (ptr32) {
453: if (ptr32[1] == 0) {
454: mode = 32;
455: pd = ptr32;
456: } else {
457: mode = 64;
458: pd = ptr64;
459: }
460: }
461: #if defined(__x86_64__)
462: } else if (strcmp(protocol, XEN_IO_PROTO_ABI_X86_32) == 0) {
463: /* 64bit dom0, 32bit domU */
464: mode = 32;
465: pd = ((void*)page->pd) - 4;
466: #elif defined(__i386__)
467: } else if (strcmp(protocol, XEN_IO_PROTO_ABI_X86_64) == 0) {
468: /* 32bit dom0, 64bit domU */
469: mode = 64;
470: pd = ((void*)page->pd) + 4;
471: #endif
472: }
473:
474: if (xenfb->pixels) {
475: munmap(xenfb->pixels, xenfb->fbpages * XC_PAGE_SIZE);
476: xenfb->pixels = NULL;
477: }
478:
479: xenfb->fbpages = (xenfb->fb_len + (XC_PAGE_SIZE - 1)) / XC_PAGE_SIZE;
480: n_fbdirs = xenfb->fbpages * mode / 8;
481: n_fbdirs = (n_fbdirs + (XC_PAGE_SIZE - 1)) / XC_PAGE_SIZE;
482:
483: pgmfns = qemu_mallocz(sizeof(unsigned long) * n_fbdirs);
484: fbmfns = qemu_mallocz(sizeof(unsigned long) * xenfb->fbpages);
485:
486: xenfb_copy_mfns(mode, n_fbdirs, pgmfns, pd);
487: map = xc_map_foreign_pages(xen_xc, xenfb->c.xendev.dom,
488: PROT_READ, pgmfns, n_fbdirs);
489: if (map == NULL)
490: goto out;
491: xenfb_copy_mfns(mode, xenfb->fbpages, fbmfns, map);
492: munmap(map, n_fbdirs * XC_PAGE_SIZE);
493:
494: xenfb->pixels = xc_map_foreign_pages(xen_xc, xenfb->c.xendev.dom,
495: PROT_READ | PROT_WRITE, fbmfns, xenfb->fbpages);
496: if (xenfb->pixels == NULL)
497: goto out;
498:
499: ret = 0; /* all is fine */
500:
501: out:
502: qemu_free(pgmfns);
503: qemu_free(fbmfns);
504: return ret;
505: }
506:
507: static int xenfb_configure_fb(struct XenFB *xenfb, size_t fb_len_lim,
508: int width, int height, int depth,
509: size_t fb_len, int offset, int row_stride)
510: {
511: size_t mfn_sz = sizeof(*((struct xenfb_page *)0)->pd);
512: size_t pd_len = sizeof(((struct xenfb_page *)0)->pd) / mfn_sz;
513: size_t fb_pages = pd_len * XC_PAGE_SIZE / mfn_sz;
514: size_t fb_len_max = fb_pages * XC_PAGE_SIZE;
515: int max_width, max_height;
516:
517: if (fb_len_lim > fb_len_max) {
518: xen_be_printf(&xenfb->c.xendev, 0, "fb size limit %zu exceeds %zu, corrected\n",
519: fb_len_lim, fb_len_max);
520: fb_len_lim = fb_len_max;
521: }
522: if (fb_len_lim && fb_len > fb_len_lim) {
523: xen_be_printf(&xenfb->c.xendev, 0, "frontend fb size %zu limited to %zu\n",
524: fb_len, fb_len_lim);
525: fb_len = fb_len_lim;
526: }
527: if (depth != 8 && depth != 16 && depth != 24 && depth != 32) {
528: xen_be_printf(&xenfb->c.xendev, 0, "can't handle frontend fb depth %d\n",
529: depth);
530: return -1;
531: }
532: if (row_stride <= 0 || row_stride > fb_len) {
533: xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend stride %d\n", row_stride);
534: return -1;
535: }
536: max_width = row_stride / (depth / 8);
537: if (width < 0 || width > max_width) {
538: xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend width %d limited to %d\n",
539: width, max_width);
540: width = max_width;
541: }
542: if (offset < 0 || offset >= fb_len) {
543: xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend offset %d (max %zu)\n",
544: offset, fb_len - 1);
545: return -1;
546: }
547: max_height = (fb_len - offset) / row_stride;
548: if (height < 0 || height > max_height) {
549: xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend height %d limited to %d\n",
550: height, max_height);
551: height = max_height;
552: }
553: xenfb->fb_len = fb_len;
554: xenfb->row_stride = row_stride;
555: xenfb->depth = depth;
556: xenfb->width = width;
557: xenfb->height = height;
558: xenfb->offset = offset;
559: xenfb->up_fullscreen = 1;
560: xenfb->do_resize = 1;
561: xen_be_printf(&xenfb->c.xendev, 1, "framebuffer %dx%dx%d offset %d stride %d\n",
562: width, height, depth, offset, row_stride);
563: return 0;
564: }
565:
566: /* A convenient function for munging pixels between different depths */
567: #define BLT(SRC_T,DST_T,RSB,GSB,BSB,RDB,GDB,BDB) \
568: for (line = y ; line < (y+h) ; line++) { \
569: SRC_T *src = (SRC_T *)(xenfb->pixels \
570: + xenfb->offset \
571: + (line * xenfb->row_stride) \
572: + (x * xenfb->depth / 8)); \
573: DST_T *dst = (DST_T *)(data \
574: + (line * linesize) \
575: + (x * bpp / 8)); \
576: int col; \
577: const int RSS = 32 - (RSB + GSB + BSB); \
578: const int GSS = 32 - (GSB + BSB); \
579: const int BSS = 32 - (BSB); \
580: const uint32_t RSM = (~0U) << (32 - RSB); \
581: const uint32_t GSM = (~0U) << (32 - GSB); \
582: const uint32_t BSM = (~0U) << (32 - BSB); \
583: const int RDS = 32 - (RDB + GDB + BDB); \
584: const int GDS = 32 - (GDB + BDB); \
585: const int BDS = 32 - (BDB); \
586: const uint32_t RDM = (~0U) << (32 - RDB); \
587: const uint32_t GDM = (~0U) << (32 - GDB); \
588: const uint32_t BDM = (~0U) << (32 - BDB); \
589: for (col = x ; col < (x+w) ; col++) { \
590: uint32_t spix = *src; \
591: *dst = (((spix << RSS) & RSM & RDM) >> RDS) | \
592: (((spix << GSS) & GSM & GDM) >> GDS) | \
593: (((spix << BSS) & BSM & BDM) >> BDS); \
594: src = (SRC_T *) ((unsigned long) src + xenfb->depth / 8); \
595: dst = (DST_T *) ((unsigned long) dst + bpp / 8); \
596: } \
597: }
598:
599:
600: /*
601: * This copies data from the guest framebuffer region, into QEMU's
602: * displaysurface. qemu uses 16 or 32 bpp. In case the pv framebuffer
603: * uses something else we must convert and copy, otherwise we can
604: * supply the buffer directly and no thing here.
605: */
606: static void xenfb_guest_copy(struct XenFB *xenfb, int x, int y, int w, int h)
607: {
608: int line, oops = 0;
609: int bpp = ds_get_bits_per_pixel(xenfb->c.ds);
610: int linesize = ds_get_linesize(xenfb->c.ds);
611: uint8_t *data = ds_get_data(xenfb->c.ds);
612:
613: if (!is_buffer_shared(xenfb->c.ds->surface)) {
614: switch (xenfb->depth) {
615: case 8:
616: if (bpp == 16) {
617: BLT(uint8_t, uint16_t, 3, 3, 2, 5, 6, 5);
618: } else if (bpp == 32) {
619: BLT(uint8_t, uint32_t, 3, 3, 2, 8, 8, 8);
620: } else {
621: oops = 1;
622: }
623: break;
624: case 24:
625: if (bpp == 16) {
626: BLT(uint32_t, uint16_t, 8, 8, 8, 5, 6, 5);
627: } else if (bpp == 32) {
628: BLT(uint32_t, uint32_t, 8, 8, 8, 8, 8, 8);
629: } else {
630: oops = 1;
631: }
632: break;
633: default:
634: oops = 1;
635: }
636: }
637: if (oops) /* should not happen */
638: xen_be_printf(&xenfb->c.xendev, 0, "%s: oops: convert %d -> %d bpp?\n",
639: __FUNCTION__, xenfb->depth, bpp);
640:
641: dpy_update(xenfb->c.ds, x, y, w, h);
642: }
643:
644: #ifdef XENFB_TYPE_REFRESH_PERIOD
645: static int xenfb_queue_full(struct XenFB *xenfb)
646: {
647: struct xenfb_page *page = xenfb->c.page;
648: uint32_t cons, prod;
649:
650: if (!page)
651: return 1;
652:
653: prod = page->in_prod;
654: cons = page->in_cons;
655: return prod - cons == XENFB_IN_RING_LEN;
656: }
657:
658: static void xenfb_send_event(struct XenFB *xenfb, union xenfb_in_event *event)
659: {
660: uint32_t prod;
661: struct xenfb_page *page = xenfb->c.page;
662:
663: prod = page->in_prod;
664: /* caller ensures !xenfb_queue_full() */
665: xen_mb(); /* ensure ring space available */
666: XENFB_IN_RING_REF(page, prod) = *event;
667: xen_wmb(); /* ensure ring contents visible */
668: page->in_prod = prod + 1;
669:
670: xen_be_send_notify(&xenfb->c.xendev);
671: }
672:
673: static void xenfb_send_refresh_period(struct XenFB *xenfb, int period)
674: {
675: union xenfb_in_event event;
676:
677: memset(&event, 0, sizeof(event));
678: event.type = XENFB_TYPE_REFRESH_PERIOD;
679: event.refresh_period.period = period;
680: xenfb_send_event(xenfb, &event);
681: }
682: #endif
683:
684: /*
685: * Periodic update of display.
686: * Also transmit the refresh interval to the frontend.
687: *
688: * Never ever do any qemu display operations
689: * (resize, screen update) outside this function.
690: * Our screen might be inactive. When asked for
691: * an update we know it is active.
692: */
693: static void xenfb_update(void *opaque)
694: {
695: struct XenFB *xenfb = opaque;
696: int i;
697:
698: if (xenfb->c.xendev.be_state != XenbusStateConnected)
699: return;
700:
701: if (xenfb->feature_update) {
702: #ifdef XENFB_TYPE_REFRESH_PERIOD
703: struct DisplayChangeListener *l;
704: int period = 99999999;
705: int idle = 1;
706:
707: if (xenfb_queue_full(xenfb))
708: return;
709:
710: for (l = xenfb->c.ds->listeners; l != NULL; l = l->next) {
711: if (l->idle)
712: continue;
713: idle = 0;
714: if (!l->gui_timer_interval) {
715: if (period > GUI_REFRESH_INTERVAL)
716: period = GUI_REFRESH_INTERVAL;
717: } else {
718: if (period > l->gui_timer_interval)
719: period = l->gui_timer_interval;
720: }
721: }
722: if (idle)
723: period = XENFB_NO_REFRESH;
724:
725: if (xenfb->refresh_period != period) {
726: xenfb_send_refresh_period(xenfb, period);
727: xenfb->refresh_period = period;
728: xen_be_printf(&xenfb->c.xendev, 1, "refresh period: %d\n", period);
729: }
730: #else
731: ; /* nothing */
732: #endif
733: } else {
734: /* we don't get update notifications, thus use the
735: * sledge hammer approach ... */
736: xenfb->up_fullscreen = 1;
737: }
738:
739: /* resize if needed */
740: if (xenfb->do_resize) {
741: xenfb->do_resize = 0;
742: switch (xenfb->depth) {
743: case 16:
744: case 32:
745: /* console.c supported depth -> buffer can be used directly */
746: qemu_free_displaysurface(xenfb->c.ds);
747: xenfb->c.ds->surface = qemu_create_displaysurface_from
748: (xenfb->width, xenfb->height, xenfb->depth,
749: xenfb->row_stride, xenfb->pixels + xenfb->offset);
750: break;
751: default:
752: /* we must convert stuff */
753: qemu_resize_displaysurface(xenfb->c.ds, xenfb->width, xenfb->height);
754: break;
755: }
756: xen_be_printf(&xenfb->c.xendev, 1, "update: resizing: %dx%d @ %d bpp%s\n",
757: xenfb->width, xenfb->height, xenfb->depth,
758: is_buffer_shared(xenfb->c.ds->surface) ? " (shared)" : "");
759: dpy_resize(xenfb->c.ds);
760: xenfb->up_fullscreen = 1;
761: }
762:
763: /* run queued updates */
764: if (xenfb->up_fullscreen) {
765: xen_be_printf(&xenfb->c.xendev, 3, "update: fullscreen\n");
766: xenfb_guest_copy(xenfb, 0, 0, xenfb->width, xenfb->height);
767: } else if (xenfb->up_count) {
768: xen_be_printf(&xenfb->c.xendev, 3, "update: %d rects\n", xenfb->up_count);
769: for (i = 0; i < xenfb->up_count; i++)
770: xenfb_guest_copy(xenfb,
771: xenfb->up_rects[i].x,
772: xenfb->up_rects[i].y,
773: xenfb->up_rects[i].w,
774: xenfb->up_rects[i].h);
775: } else {
776: xen_be_printf(&xenfb->c.xendev, 3, "update: nothing\n");
777: }
778: xenfb->up_count = 0;
779: xenfb->up_fullscreen = 0;
780: }
781:
782: /* QEMU display state changed, so refresh the framebuffer copy */
783: static void xenfb_invalidate(void *opaque)
784: {
785: struct XenFB *xenfb = opaque;
786: xenfb->up_fullscreen = 1;
787: }
788:
789: static void xenfb_handle_events(struct XenFB *xenfb)
790: {
791: uint32_t prod, cons;
792: struct xenfb_page *page = xenfb->c.page;
793:
794: prod = page->out_prod;
795: if (prod == page->out_cons)
796: return;
797: xen_rmb(); /* ensure we see ring contents up to prod */
798: for (cons = page->out_cons; cons != prod; cons++) {
799: union xenfb_out_event *event = &XENFB_OUT_RING_REF(page, cons);
800: int x, y, w, h;
801:
802: switch (event->type) {
803: case XENFB_TYPE_UPDATE:
804: if (xenfb->up_count == UP_QUEUE)
805: xenfb->up_fullscreen = 1;
806: if (xenfb->up_fullscreen)
807: break;
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");
814: break;
815: }
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");
821: }
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;
826: } else {
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;
831: xenfb->up_count++;
832: }
833: break;
834: #ifdef XENFB_TYPE_RESIZE
835: case XENFB_TYPE_RESIZE:
836: if (xenfb_configure_fb(xenfb, xenfb->fb_len,
837: event->resize.width,
838: event->resize.height,
839: event->resize.depth,
840: xenfb->fb_len,
841: event->resize.offset,
842: event->resize.stride) < 0)
843: break;
844: xenfb_invalidate(xenfb);
845: break;
846: #endif
847: }
848: }
849: xen_mb(); /* ensure we're done with ring contents */
850: page->out_cons = cons;
851: }
852:
853: static int fb_init(struct XenDevice *xendev)
854: {
855: struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
856:
857: fb->refresh_period = -1;
858:
859: #ifdef XENFB_TYPE_RESIZE
860: xenstore_write_be_int(xendev, "feature-resize", 1);
861: #endif
862: return 0;
863: }
864:
865: static int fb_connect(struct XenDevice *xendev)
866: {
867: struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
868: struct xenfb_page *fb_page;
869: int videoram;
870: int rc;
871:
872: if (xenstore_read_fe_int(xendev, "videoram", &videoram) == -1)
873: videoram = 0;
874:
875: rc = common_bind(&fb->c);
876: if (rc != 0)
877: return rc;
878:
879: fb_page = fb->c.page;
880: rc = xenfb_configure_fb(fb, videoram * 1024 * 1024U,
881: fb_page->width, fb_page->height, fb_page->depth,
882: fb_page->mem_length, 0, fb_page->line_length);
883: if (rc != 0)
884: return rc;
885:
886: rc = xenfb_map_fb(fb);
887: if (rc != 0)
888: return rc;
889:
890: #if 0 /* handled in xen_init_display() for now */
891: if (!fb->have_console) {
892: fb->c.ds = graphic_console_init(xenfb_update,
893: xenfb_invalidate,
894: NULL,
895: NULL,
896: fb);
897: fb->have_console = 1;
898: }
899: #endif
900:
901: if (xenstore_read_fe_int(xendev, "feature-update", &fb->feature_update) == -1)
902: fb->feature_update = 0;
903: if (fb->feature_update)
904: xenstore_write_be_int(xendev, "request-update", 1);
905:
906: xen_be_printf(xendev, 1, "feature-update=%d, videoram=%d\n",
907: fb->feature_update, videoram);
908: return 0;
909: }
910:
911: static void fb_disconnect(struct XenDevice *xendev)
912: {
913: struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
914:
915: /*
916: * FIXME: qemu can't un-init gfx display (yet?).
917: * Replacing the framebuffer with anonymous shared memory
918: * instead. This releases the guest pages and keeps qemu happy.
919: */
920: fb->pixels = mmap(fb->pixels, fb->fbpages * XC_PAGE_SIZE,
921: PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANON,
922: -1, 0);
923: common_unbind(&fb->c);
924: fb->feature_update = 0;
925: fb->bug_trigger = 0;
926: }
927:
928: static void fb_frontend_changed(struct XenDevice *xendev, const char *node)
929: {
930: struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
931:
932: /*
933: * Set state to Connected *again* once the frontend switched
934: * to connected. We must trigger the watch a second time to
935: * workaround a frontend bug.
936: */
937: if (fb->bug_trigger == 0 && strcmp(node, "state") == 0 &&
938: xendev->fe_state == XenbusStateConnected &&
939: xendev->be_state == XenbusStateConnected) {
940: xen_be_printf(xendev, 2, "re-trigger connected (frontend bug)\n");
941: xen_be_set_state(xendev, XenbusStateConnected);
942: fb->bug_trigger = 1; /* only once */
943: }
944: }
945:
946: static void fb_event(struct XenDevice *xendev)
947: {
948: struct XenFB *xenfb = container_of(xendev, struct XenFB, c.xendev);
949:
950: xenfb_handle_events(xenfb);
951: xen_be_send_notify(&xenfb->c.xendev);
952: }
953:
954: /* -------------------------------------------------------------------- */
955:
956: struct XenDevOps xen_kbdmouse_ops = {
957: .size = sizeof(struct XenInput),
958: .init = input_init,
959: .connect = input_connect,
960: .disconnect = input_disconnect,
961: .event = input_event,
962: };
963:
964: struct XenDevOps xen_framebuffer_ops = {
965: .size = sizeof(struct XenFB),
966: .init = fb_init,
967: .connect = fb_connect,
968: .disconnect = fb_disconnect,
969: .event = fb_event,
970: .frontend_changed = fb_frontend_changed,
971: };
972:
973: /*
974: * FIXME/TODO: Kill this.
975: * Temporary needed while DisplayState reorganization is in flight.
976: */
977: void xen_init_display(int domid)
978: {
979: struct XenDevice *xfb, *xin;
980: struct XenFB *fb;
981: struct XenInput *in;
982: int i = 0;
983:
984: wait_more:
985: i++;
986: main_loop_wait(10); /* miliseconds */
987: xfb = xen_be_find_xendev("vfb", domid, 0);
988: xin = xen_be_find_xendev("vkbd", domid, 0);
989: if (!xfb || !xin) {
990: if (i < 256)
991: goto wait_more;
992: xen_be_printf(NULL, 1, "displaystate setup failed\n");
993: return;
994: }
995:
996: /* vfb */
997: fb = container_of(xfb, struct XenFB, c.xendev);
998: fb->c.ds = graphic_console_init(xenfb_update,
999: xenfb_invalidate,
1000: NULL,
1001: NULL,
1002: fb);
1003: fb->have_console = 1;
1004:
1005: /* vkbd */
1006: in = container_of(xin, struct XenInput, c.xendev);
1007: in->c.ds = fb->c.ds;
1008:
1009: /* retry ->init() */
1010: xen_be_check_state(xin);
1011: xen_be_check_state(xfb);
1012: }
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