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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 <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 "console.h"
48: #include "qemu-char.h"
49: #include "xen_backend.h"
50:
51: #ifndef BTN_LEFT
52: #define BTN_LEFT 0x110 /* from <linux/input.h> */
53: #endif
54:
55: /* -------------------------------------------------------------------- */
56:
57: struct common {
58: struct XenDevice xendev; /* must be first */
59: void *page;
60: DisplayState *ds;
61: };
62:
63: struct XenInput {
64: struct common c;
65: int abs_pointer_wanted; /* Whether guest supports absolute pointer */
66: int button_state; /* Last seen pointer button state */
67: int extended;
68: QEMUPutMouseEntry *qmouse;
69: };
70:
71: #define UP_QUEUE 8
72:
73: struct XenFB {
74: struct common c;
75: size_t fb_len;
76: int row_stride;
77: int depth;
78: int width;
79: int height;
80: int offset;
81: void *pixels;
82: int fbpages;
83: int feature_update;
84: int refresh_period;
85: int bug_trigger;
86: int have_console;
87: int do_resize;
88:
89: struct {
90: int x,y,w,h;
91: } up_rects[UP_QUEUE];
92: int up_count;
93: int up_fullscreen;
94: };
95:
96: /* -------------------------------------------------------------------- */
97:
98: static int common_bind(struct common *c)
99: {
100: int mfn;
101:
102: if (xenstore_read_fe_int(&c->xendev, "page-ref", &mfn) == -1)
103: return -1;
104: if (xenstore_read_fe_int(&c->xendev, "event-channel", &c->xendev.remote_port) == -1)
105: return -1;
106:
107: c->page = xc_map_foreign_range(xen_xc, c->xendev.dom,
108: XC_PAGE_SIZE,
109: PROT_READ | PROT_WRITE, mfn);
110: if (c->page == NULL)
111: return -1;
112:
113: xen_be_bind_evtchn(&c->xendev);
114: xen_be_printf(&c->xendev, 1, "ring mfn %d, remote-port %d, local-port %d\n",
115: mfn, c->xendev.remote_port, c->xendev.local_port);
116:
117: return 0;
118: }
119:
120: static void common_unbind(struct common *c)
121: {
122: xen_be_unbind_evtchn(&c->xendev);
123: if (c->page) {
124: munmap(c->page, XC_PAGE_SIZE);
125: c->page = NULL;
126: }
127: }
128:
129: /* -------------------------------------------------------------------- */
130:
131: #if 0
132: /*
133: * These two tables are not needed any more, but left in here
134: * intentionally as documentation, to show how scancode2linux[]
135: * was generated.
136: *
137: * Tables to map from scancode to Linux input layer keycode.
138: * Scancodes are hardware-specific. These maps assumes a
139: * standard AT or PS/2 keyboard which is what QEMU feeds us.
140: */
141: const unsigned char atkbd_set2_keycode[512] = {
142:
143: 0, 67, 65, 63, 61, 59, 60, 88, 0, 68, 66, 64, 62, 15, 41,117,
144: 0, 56, 42, 93, 29, 16, 2, 0, 0, 0, 44, 31, 30, 17, 3, 0,
145: 0, 46, 45, 32, 18, 5, 4, 95, 0, 57, 47, 33, 20, 19, 6,183,
146: 0, 49, 48, 35, 34, 21, 7,184, 0, 0, 50, 36, 22, 8, 9,185,
147: 0, 51, 37, 23, 24, 11, 10, 0, 0, 52, 53, 38, 39, 25, 12, 0,
148: 0, 89, 40, 0, 26, 13, 0, 0, 58, 54, 28, 27, 0, 43, 0, 85,
149: 0, 86, 91, 90, 92, 0, 14, 94, 0, 79,124, 75, 71,121, 0, 0,
150: 82, 83, 80, 76, 77, 72, 1, 69, 87, 78, 81, 74, 55, 73, 70, 99,
151:
152: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
153: 217,100,255, 0, 97,165, 0, 0,156, 0, 0, 0, 0, 0, 0,125,
154: 173,114, 0,113, 0, 0, 0,126,128, 0, 0,140, 0, 0, 0,127,
155: 159, 0,115, 0,164, 0, 0,116,158, 0,150,166, 0, 0, 0,142,
156: 157, 0, 0, 0, 0, 0, 0, 0,155, 0, 98, 0, 0,163, 0, 0,
157: 226, 0, 0, 0, 0, 0, 0, 0, 0,255, 96, 0, 0, 0,143, 0,
158: 0, 0, 0, 0, 0, 0, 0, 0, 0,107, 0,105,102, 0, 0,112,
159: 110,111,108,112,106,103, 0,119, 0,118,109, 0, 99,104,119, 0,
160:
161: };
162:
163: const unsigned char atkbd_unxlate_table[128] = {
164:
165: 0,118, 22, 30, 38, 37, 46, 54, 61, 62, 70, 69, 78, 85,102, 13,
166: 21, 29, 36, 45, 44, 53, 60, 67, 68, 77, 84, 91, 90, 20, 28, 27,
167: 35, 43, 52, 51, 59, 66, 75, 76, 82, 14, 18, 93, 26, 34, 33, 42,
168: 50, 49, 58, 65, 73, 74, 89,124, 17, 41, 88, 5, 6, 4, 12, 3,
169: 11, 2, 10, 1, 9,119,126,108,117,125,123,107,115,116,121,105,
170: 114,122,112,113,127, 96, 97,120, 7, 15, 23, 31, 39, 47, 55, 63,
171: 71, 79, 86, 94, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 87,111,
172: 19, 25, 57, 81, 83, 92, 95, 98, 99,100,101,103,104,106,109,110
173:
174: };
175: #endif
176:
177: /*
178: * for (i = 0; i < 128; i++) {
179: * scancode2linux[i] = atkbd_set2_keycode[atkbd_unxlate_table[i]];
180: * scancode2linux[i | 0x80] = atkbd_set2_keycode[atkbd_unxlate_table[i] | 0x80];
181: * }
182: */
183: static const unsigned char scancode2linux[512] = {
184: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
185: 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
186: 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
187: 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
188: 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
189: 80, 81, 82, 83, 99, 0, 86, 87, 88,117, 0, 0, 95,183,184,185,
190: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
191: 93, 0, 0, 89, 0, 0, 85, 91, 90, 92, 0, 94, 0,124,121, 0,
192:
193: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
194: 165, 0, 0, 0, 0, 0, 0, 0, 0,163, 0, 0, 96, 97, 0, 0,
195: 113,140,164, 0,166, 0, 0, 0, 0, 0,255, 0, 0, 0,114, 0,
196: 115, 0,150, 0, 0, 98,255, 99,100, 0, 0, 0, 0, 0, 0, 0,
197: 0, 0, 0, 0, 0,119,119,102,103,104, 0,105,112,106,118,107,
198: 108,109,110,111, 0, 0, 0, 0, 0, 0, 0,125,126,127,116,142,
199: 0, 0, 0,143, 0,217,156,173,128,159,158,157,155,226, 0,112,
200: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
201: };
202:
203: /* Send an event to the keyboard frontend driver */
204: static int xenfb_kbd_event(struct XenInput *xenfb,
205: union xenkbd_in_event *event)
206: {
207: struct xenkbd_page *page = xenfb->c.page;
208: uint32_t prod;
209:
210: if (xenfb->c.xendev.be_state != XenbusStateConnected)
211: return 0;
212: if (!page)
213: return 0;
214:
215: prod = page->in_prod;
216: if (prod - page->in_cons == XENKBD_IN_RING_LEN) {
217: errno = EAGAIN;
218: return -1;
219: }
220:
221: xen_mb(); /* ensure ring space available */
222: XENKBD_IN_RING_REF(page, prod) = *event;
223: xen_wmb(); /* ensure ring contents visible */
224: page->in_prod = prod + 1;
225: return xen_be_send_notify(&xenfb->c.xendev);
226: }
227:
228: /* Send a keyboard (or mouse button) event */
229: static int xenfb_send_key(struct XenInput *xenfb, bool down, int keycode)
230: {
231: union xenkbd_in_event event;
232:
233: memset(&event, 0, XENKBD_IN_EVENT_SIZE);
234: event.type = XENKBD_TYPE_KEY;
235: event.key.pressed = down ? 1 : 0;
236: event.key.keycode = keycode;
237:
238: return xenfb_kbd_event(xenfb, &event);
239: }
240:
241: /* Send a relative mouse movement event */
242: static int xenfb_send_motion(struct XenInput *xenfb,
243: int rel_x, int rel_y, int rel_z)
244: {
245: union xenkbd_in_event event;
246:
247: memset(&event, 0, XENKBD_IN_EVENT_SIZE);
248: event.type = XENKBD_TYPE_MOTION;
249: event.motion.rel_x = rel_x;
250: event.motion.rel_y = rel_y;
251: #if __XEN_LATEST_INTERFACE_VERSION__ >= 0x00030207
252: event.motion.rel_z = rel_z;
253: #endif
254:
255: return xenfb_kbd_event(xenfb, &event);
256: }
257:
258: /* Send an absolute mouse movement event */
259: static int xenfb_send_position(struct XenInput *xenfb,
260: int abs_x, int abs_y, int z)
261: {
262: union xenkbd_in_event event;
263:
264: memset(&event, 0, XENKBD_IN_EVENT_SIZE);
265: event.type = XENKBD_TYPE_POS;
266: event.pos.abs_x = abs_x;
267: event.pos.abs_y = abs_y;
268: #if __XEN_LATEST_INTERFACE_VERSION__ == 0x00030207
269: event.pos.abs_z = z;
270: #endif
271: #if __XEN_LATEST_INTERFACE_VERSION__ >= 0x00030208
272: event.pos.rel_z = z;
273: #endif
274:
275: return xenfb_kbd_event(xenfb, &event);
276: }
277:
278: /*
279: * Send a key event from the client to the guest OS
280: * QEMU gives us a raw scancode from an AT / PS/2 style keyboard.
281: * We have to turn this into a Linux Input layer keycode.
282: *
283: * Extra complexity from the fact that with extended scancodes
284: * (like those produced by arrow keys) this method gets called
285: * twice, but we only want to send a single event. So we have to
286: * track the '0xe0' scancode state & collapse the extended keys
287: * as needed.
288: *
289: * Wish we could just send scancodes straight to the guest which
290: * already has code for dealing with this...
291: */
292: static void xenfb_key_event(void *opaque, int scancode)
293: {
294: struct XenInput *xenfb = opaque;
295: int down = 1;
296:
297: if (scancode == 0xe0) {
298: xenfb->extended = 1;
299: return;
300: } else if (scancode & 0x80) {
301: scancode &= 0x7f;
302: down = 0;
303: }
304: if (xenfb->extended) {
305: scancode |= 0x80;
306: xenfb->extended = 0;
307: }
308: xenfb_send_key(xenfb, down, scancode2linux[scancode]);
309: }
310:
311: /*
312: * Send a mouse event from the client to the guest OS
313: *
314: * The QEMU mouse can be in either relative, or absolute mode.
315: * Movement is sent separately from button state, which has to
316: * be encoded as virtual key events. We also don't actually get
317: * given any button up/down events, so have to track changes in
318: * the button state.
319: */
320: static void xenfb_mouse_event(void *opaque,
321: int dx, int dy, int dz, int button_state)
322: {
323: struct XenInput *xenfb = opaque;
324: int dw = ds_get_width(xenfb->c.ds);
325: int dh = ds_get_height(xenfb->c.ds);
326: int i;
327:
328: if (xenfb->abs_pointer_wanted)
329: xenfb_send_position(xenfb,
330: dx * (dw - 1) / 0x7fff,
331: dy * (dh - 1) / 0x7fff,
332: dz);
333: else
334: xenfb_send_motion(xenfb, dx, dy, dz);
335:
336: for (i = 0 ; i < 8 ; i++) {
337: int lastDown = xenfb->button_state & (1 << i);
338: int down = button_state & (1 << i);
339: if (down == lastDown)
340: continue;
341:
342: if (xenfb_send_key(xenfb, down, BTN_LEFT+i) < 0)
343: return;
344: }
345: xenfb->button_state = button_state;
346: }
347:
348: static int input_init(struct XenDevice *xendev)
349: {
350: xenstore_write_be_int(xendev, "feature-abs-pointer", 1);
351: return 0;
352: }
353:
354: static int input_connect(struct XenDevice *xendev)
355: {
356: struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
357: int rc;
358:
359: if (xenstore_read_fe_int(xendev, "request-abs-pointer",
360: &in->abs_pointer_wanted) == -1)
361: in->abs_pointer_wanted = 0;
362:
1.1.1.3 ! root 363: if (!in->c.ds) {
! 364: char *vfb = xenstore_read_str(NULL, "device/vfb");
! 365: if (vfb == NULL) {
! 366: /* there is no vfb, run vkbd on its own */
! 367: in->c.ds = get_displaystate();
! 368: } else {
! 369: qemu_free(vfb);
! 370: xen_be_printf(xendev, 1, "ds not set (yet)\n");
! 371: return -1;
! 372: }
! 373: }
! 374:
1.1 root 375: rc = common_bind(&in->c);
376: if (rc != 0)
377: return rc;
378:
379: qemu_add_kbd_event_handler(xenfb_key_event, in);
380: in->qmouse = qemu_add_mouse_event_handler(xenfb_mouse_event, in,
381: in->abs_pointer_wanted,
382: "Xen PVFB Mouse");
383: return 0;
384: }
385:
386: static void input_disconnect(struct XenDevice *xendev)
387: {
388: struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
389:
390: if (in->qmouse) {
391: qemu_remove_mouse_event_handler(in->qmouse);
392: in->qmouse = NULL;
393: }
394: qemu_add_kbd_event_handler(NULL, NULL);
395: common_unbind(&in->c);
396: }
397:
398: static void input_event(struct XenDevice *xendev)
399: {
400: struct XenInput *xenfb = container_of(xendev, struct XenInput, c.xendev);
401: struct xenkbd_page *page = xenfb->c.page;
402:
403: /* We don't understand any keyboard events, so just ignore them. */
404: if (page->out_prod == page->out_cons)
405: return;
406: page->out_cons = page->out_prod;
407: xen_be_send_notify(&xenfb->c.xendev);
408: }
409:
410: /* -------------------------------------------------------------------- */
411:
412: static void xenfb_copy_mfns(int mode, int count, unsigned long *dst, void *src)
413: {
414: uint32_t *src32 = src;
415: uint64_t *src64 = src;
416: int i;
417:
418: for (i = 0; i < count; i++)
419: dst[i] = (mode == 32) ? src32[i] : src64[i];
420: }
421:
422: static int xenfb_map_fb(struct XenFB *xenfb)
423: {
424: struct xenfb_page *page = xenfb->c.page;
425: char *protocol = xenfb->c.xendev.protocol;
426: int n_fbdirs;
427: unsigned long *pgmfns = NULL;
428: unsigned long *fbmfns = NULL;
429: void *map, *pd;
430: int mode, ret = -1;
431:
432: /* default to native */
433: pd = page->pd;
434: mode = sizeof(unsigned long) * 8;
435:
436: if (!protocol) {
437: /*
438: * Undefined protocol, some guesswork needed.
439: *
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 ...
445: */
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;
454: #endif
455: if (ptr32) {
456: if (ptr32[1] == 0) {
457: mode = 32;
458: pd = ptr32;
459: } else {
460: mode = 64;
461: pd = ptr64;
462: }
463: }
464: #if defined(__x86_64__)
465: } else if (strcmp(protocol, XEN_IO_PROTO_ABI_X86_32) == 0) {
466: /* 64bit dom0, 32bit domU */
467: mode = 32;
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 */
472: mode = 64;
473: pd = ((void*)page->pd) + 4;
474: #endif
475: }
476:
477: if (xenfb->pixels) {
478: munmap(xenfb->pixels, xenfb->fbpages * XC_PAGE_SIZE);
479: xenfb->pixels = NULL;
480: }
481:
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;
485:
486: pgmfns = qemu_mallocz(sizeof(unsigned long) * n_fbdirs);
487: fbmfns = qemu_mallocz(sizeof(unsigned long) * xenfb->fbpages);
488:
489: xenfb_copy_mfns(mode, n_fbdirs, pgmfns, pd);
490: map = xc_map_foreign_pages(xen_xc, xenfb->c.xendev.dom,
491: PROT_READ, pgmfns, n_fbdirs);
492: if (map == NULL)
493: goto out;
494: xenfb_copy_mfns(mode, xenfb->fbpages, fbmfns, map);
495: munmap(map, n_fbdirs * XC_PAGE_SIZE);
496:
497: xenfb->pixels = xc_map_foreign_pages(xen_xc, xenfb->c.xendev.dom,
498: PROT_READ | PROT_WRITE, fbmfns, xenfb->fbpages);
499: if (xenfb->pixels == NULL)
500: goto out;
501:
502: ret = 0; /* all is fine */
503:
504: out:
505: qemu_free(pgmfns);
506: qemu_free(fbmfns);
507: return ret;
508: }
509:
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)
513: {
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;
519:
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;
524: }
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",
527: fb_len, fb_len_lim);
528: fb_len = fb_len_lim;
529: }
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",
532: depth);
533: return -1;
534: }
535: if (row_stride <= 0 || row_stride > fb_len) {
536: xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend stride %d\n", row_stride);
537: return -1;
538: }
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",
542: width, max_width);
543: width = max_width;
544: }
545: if (offset < 0 || offset >= fb_len) {
546: xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend offset %d (max %zu)\n",
547: offset, fb_len - 1);
548: return -1;
549: }
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",
553: height, max_height);
554: height = max_height;
555: }
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);
566: return 0;
567: }
568:
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 \
573: + xenfb->offset \
574: + (line * xenfb->row_stride) \
575: + (x * xenfb->depth / 8)); \
576: DST_T *dst = (DST_T *)(data \
577: + (line * linesize) \
578: + (x * bpp / 8)); \
579: int col; \
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); \
599: } \
600: }
601:
602:
603: /*
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.
608: */
609: static void xenfb_guest_copy(struct XenFB *xenfb, int x, int y, int w, int h)
610: {
611: int line, oops = 0;
612: int bpp = ds_get_bits_per_pixel(xenfb->c.ds);
613: int linesize = ds_get_linesize(xenfb->c.ds);
614: uint8_t *data = ds_get_data(xenfb->c.ds);
615:
616: if (!is_buffer_shared(xenfb->c.ds->surface)) {
617: switch (xenfb->depth) {
618: case 8:
619: if (bpp == 16) {
620: BLT(uint8_t, uint16_t, 3, 3, 2, 5, 6, 5);
621: } else if (bpp == 32) {
622: BLT(uint8_t, uint32_t, 3, 3, 2, 8, 8, 8);
623: } else {
624: oops = 1;
625: }
626: break;
627: case 24:
628: if (bpp == 16) {
629: BLT(uint32_t, uint16_t, 8, 8, 8, 5, 6, 5);
630: } else if (bpp == 32) {
631: BLT(uint32_t, uint32_t, 8, 8, 8, 8, 8, 8);
632: } else {
633: oops = 1;
634: }
635: break;
636: default:
637: oops = 1;
638: }
639: }
640: if (oops) /* should not happen */
641: xen_be_printf(&xenfb->c.xendev, 0, "%s: oops: convert %d -> %d bpp?\n",
642: __FUNCTION__, xenfb->depth, bpp);
643:
644: dpy_update(xenfb->c.ds, x, y, w, h);
645: }
646:
647: #ifdef XENFB_TYPE_REFRESH_PERIOD
648: static int xenfb_queue_full(struct XenFB *xenfb)
649: {
650: struct xenfb_page *page = xenfb->c.page;
651: uint32_t cons, prod;
652:
653: if (!page)
654: return 1;
655:
656: prod = page->in_prod;
657: cons = page->in_cons;
658: return prod - cons == XENFB_IN_RING_LEN;
659: }
660:
661: static void xenfb_send_event(struct XenFB *xenfb, union xenfb_in_event *event)
662: {
663: uint32_t prod;
664: struct xenfb_page *page = xenfb->c.page;
665:
666: prod = page->in_prod;
667: /* caller ensures !xenfb_queue_full() */
668: xen_mb(); /* ensure ring space available */
669: XENFB_IN_RING_REF(page, prod) = *event;
670: xen_wmb(); /* ensure ring contents visible */
671: page->in_prod = prod + 1;
672:
673: xen_be_send_notify(&xenfb->c.xendev);
674: }
675:
676: static void xenfb_send_refresh_period(struct XenFB *xenfb, int period)
677: {
678: union xenfb_in_event event;
679:
680: memset(&event, 0, sizeof(event));
681: event.type = XENFB_TYPE_REFRESH_PERIOD;
682: event.refresh_period.period = period;
683: xenfb_send_event(xenfb, &event);
684: }
685: #endif
686:
687: /*
688: * Periodic update of display.
689: * Also transmit the refresh interval to the frontend.
690: *
691: * Never ever do any qemu display operations
692: * (resize, screen update) outside this function.
693: * Our screen might be inactive. When asked for
694: * an update we know it is active.
695: */
696: static void xenfb_update(void *opaque)
697: {
698: struct XenFB *xenfb = opaque;
699: int i;
700:
701: if (xenfb->c.xendev.be_state != XenbusStateConnected)
702: return;
703:
704: if (xenfb->feature_update) {
705: #ifdef XENFB_TYPE_REFRESH_PERIOD
706: struct DisplayChangeListener *l;
707: int period = 99999999;
708: int idle = 1;
709:
710: if (xenfb_queue_full(xenfb))
711: return;
712:
713: for (l = xenfb->c.ds->listeners; l != NULL; l = l->next) {
714: if (l->idle)
715: continue;
716: idle = 0;
717: if (!l->gui_timer_interval) {
718: if (period > GUI_REFRESH_INTERVAL)
719: period = GUI_REFRESH_INTERVAL;
720: } else {
721: if (period > l->gui_timer_interval)
722: period = l->gui_timer_interval;
723: }
724: }
725: if (idle)
726: period = XENFB_NO_REFRESH;
727:
728: if (xenfb->refresh_period != period) {
729: xenfb_send_refresh_period(xenfb, period);
730: xenfb->refresh_period = period;
731: xen_be_printf(&xenfb->c.xendev, 1, "refresh period: %d\n", period);
732: }
733: #else
734: ; /* nothing */
735: #endif
736: } else {
737: /* we don't get update notifications, thus use the
738: * sledge hammer approach ... */
739: xenfb->up_fullscreen = 1;
740: }
741:
742: /* resize if needed */
743: if (xenfb->do_resize) {
744: xenfb->do_resize = 0;
745: switch (xenfb->depth) {
746: case 16:
747: case 32:
748: /* console.c supported depth -> buffer can be used directly */
749: qemu_free_displaysurface(xenfb->c.ds);
750: xenfb->c.ds->surface = qemu_create_displaysurface_from
751: (xenfb->width, xenfb->height, xenfb->depth,
752: xenfb->row_stride, xenfb->pixels + xenfb->offset);
753: break;
754: default:
755: /* we must convert stuff */
756: qemu_resize_displaysurface(xenfb->c.ds, xenfb->width, xenfb->height);
757: break;
758: }
759: xen_be_printf(&xenfb->c.xendev, 1, "update: resizing: %dx%d @ %d bpp%s\n",
760: xenfb->width, xenfb->height, xenfb->depth,
761: is_buffer_shared(xenfb->c.ds->surface) ? " (shared)" : "");
762: dpy_resize(xenfb->c.ds);
763: xenfb->up_fullscreen = 1;
764: }
765:
766: /* run queued updates */
767: if (xenfb->up_fullscreen) {
768: xen_be_printf(&xenfb->c.xendev, 3, "update: fullscreen\n");
769: xenfb_guest_copy(xenfb, 0, 0, xenfb->width, xenfb->height);
770: } else if (xenfb->up_count) {
771: xen_be_printf(&xenfb->c.xendev, 3, "update: %d rects\n", xenfb->up_count);
772: for (i = 0; i < xenfb->up_count; i++)
773: xenfb_guest_copy(xenfb,
774: xenfb->up_rects[i].x,
775: xenfb->up_rects[i].y,
776: xenfb->up_rects[i].w,
777: xenfb->up_rects[i].h);
778: } else {
779: xen_be_printf(&xenfb->c.xendev, 3, "update: nothing\n");
780: }
781: xenfb->up_count = 0;
782: xenfb->up_fullscreen = 0;
783: }
784:
785: /* QEMU display state changed, so refresh the framebuffer copy */
786: static void xenfb_invalidate(void *opaque)
787: {
788: struct XenFB *xenfb = opaque;
789: xenfb->up_fullscreen = 1;
790: }
791:
792: static void xenfb_handle_events(struct XenFB *xenfb)
793: {
794: uint32_t prod, cons;
795: struct xenfb_page *page = xenfb->c.page;
796:
797: prod = page->out_prod;
798: if (prod == page->out_cons)
799: return;
800: xen_rmb(); /* ensure we see ring contents up to prod */
801: for (cons = page->out_cons; cons != prod; cons++) {
802: union xenfb_out_event *event = &XENFB_OUT_RING_REF(page, cons);
803: int x, y, w, h;
804:
805: switch (event->type) {
806: case XENFB_TYPE_UPDATE:
807: if (xenfb->up_count == UP_QUEUE)
808: xenfb->up_fullscreen = 1;
809: if (xenfb->up_fullscreen)
810: break;
811: x = MAX(event->update.x, 0);
812: y = MAX(event->update.y, 0);
813: w = MIN(event->update.width, xenfb->width - x);
814: h = MIN(event->update.height, xenfb->height - y);
815: if (w < 0 || h < 0) {
816: xen_be_printf(&xenfb->c.xendev, 1, "bogus update ignored\n");
817: break;
818: }
819: if (x != event->update.x ||
820: y != event->update.y ||
821: w != event->update.width ||
822: h != event->update.height) {
823: xen_be_printf(&xenfb->c.xendev, 1, "bogus update clipped\n");
824: }
825: if (w == xenfb->width && h > xenfb->height / 2) {
826: /* scroll detector: updated more than 50% of the lines,
827: * don't bother keeping track of the rectangles then */
828: xenfb->up_fullscreen = 1;
829: } else {
830: xenfb->up_rects[xenfb->up_count].x = x;
831: xenfb->up_rects[xenfb->up_count].y = y;
832: xenfb->up_rects[xenfb->up_count].w = w;
833: xenfb->up_rects[xenfb->up_count].h = h;
834: xenfb->up_count++;
835: }
836: break;
837: #ifdef XENFB_TYPE_RESIZE
838: case XENFB_TYPE_RESIZE:
839: if (xenfb_configure_fb(xenfb, xenfb->fb_len,
840: event->resize.width,
841: event->resize.height,
842: event->resize.depth,
843: xenfb->fb_len,
844: event->resize.offset,
845: event->resize.stride) < 0)
846: break;
847: xenfb_invalidate(xenfb);
848: break;
849: #endif
850: }
851: }
852: xen_mb(); /* ensure we're done with ring contents */
853: page->out_cons = cons;
854: }
855:
856: static int fb_init(struct XenDevice *xendev)
857: {
858: struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
859:
860: fb->refresh_period = -1;
861:
862: #ifdef XENFB_TYPE_RESIZE
863: xenstore_write_be_int(xendev, "feature-resize", 1);
864: #endif
865: return 0;
866: }
867:
868: static int fb_connect(struct XenDevice *xendev)
869: {
870: struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
871: struct xenfb_page *fb_page;
872: int videoram;
873: int rc;
874:
875: if (xenstore_read_fe_int(xendev, "videoram", &videoram) == -1)
876: videoram = 0;
877:
878: rc = common_bind(&fb->c);
879: if (rc != 0)
880: return rc;
881:
882: fb_page = fb->c.page;
883: rc = xenfb_configure_fb(fb, videoram * 1024 * 1024U,
884: fb_page->width, fb_page->height, fb_page->depth,
885: fb_page->mem_length, 0, fb_page->line_length);
886: if (rc != 0)
887: return rc;
888:
889: rc = xenfb_map_fb(fb);
890: if (rc != 0)
891: return rc;
892:
893: #if 0 /* handled in xen_init_display() for now */
894: if (!fb->have_console) {
895: fb->c.ds = graphic_console_init(xenfb_update,
896: xenfb_invalidate,
897: NULL,
898: NULL,
899: fb);
900: fb->have_console = 1;
901: }
902: #endif
903:
904: if (xenstore_read_fe_int(xendev, "feature-update", &fb->feature_update) == -1)
905: fb->feature_update = 0;
906: if (fb->feature_update)
907: xenstore_write_be_int(xendev, "request-update", 1);
908:
909: xen_be_printf(xendev, 1, "feature-update=%d, videoram=%d\n",
910: fb->feature_update, videoram);
911: return 0;
912: }
913:
914: static void fb_disconnect(struct XenDevice *xendev)
915: {
916: struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
917:
918: /*
919: * FIXME: qemu can't un-init gfx display (yet?).
920: * Replacing the framebuffer with anonymous shared memory
921: * instead. This releases the guest pages and keeps qemu happy.
922: */
923: fb->pixels = mmap(fb->pixels, fb->fbpages * XC_PAGE_SIZE,
924: PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANON,
925: -1, 0);
926: common_unbind(&fb->c);
927: fb->feature_update = 0;
928: fb->bug_trigger = 0;
929: }
930:
931: static void fb_frontend_changed(struct XenDevice *xendev, const char *node)
932: {
933: struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
934:
935: /*
936: * Set state to Connected *again* once the frontend switched
937: * to connected. We must trigger the watch a second time to
938: * workaround a frontend bug.
939: */
940: if (fb->bug_trigger == 0 && strcmp(node, "state") == 0 &&
941: xendev->fe_state == XenbusStateConnected &&
942: xendev->be_state == XenbusStateConnected) {
943: xen_be_printf(xendev, 2, "re-trigger connected (frontend bug)\n");
944: xen_be_set_state(xendev, XenbusStateConnected);
945: fb->bug_trigger = 1; /* only once */
946: }
947: }
948:
949: static void fb_event(struct XenDevice *xendev)
950: {
951: struct XenFB *xenfb = container_of(xendev, struct XenFB, c.xendev);
952:
953: xenfb_handle_events(xenfb);
954: xen_be_send_notify(&xenfb->c.xendev);
955: }
956:
957: /* -------------------------------------------------------------------- */
958:
959: struct XenDevOps xen_kbdmouse_ops = {
960: .size = sizeof(struct XenInput),
961: .init = input_init,
962: .connect = input_connect,
963: .disconnect = input_disconnect,
964: .event = input_event,
965: };
966:
967: struct XenDevOps xen_framebuffer_ops = {
968: .size = sizeof(struct XenFB),
969: .init = fb_init,
970: .connect = fb_connect,
971: .disconnect = fb_disconnect,
972: .event = fb_event,
973: .frontend_changed = fb_frontend_changed,
974: };
975:
976: /*
977: * FIXME/TODO: Kill this.
978: * Temporary needed while DisplayState reorganization is in flight.
979: */
980: void xen_init_display(int domid)
981: {
982: struct XenDevice *xfb, *xin;
983: struct XenFB *fb;
984: struct XenInput *in;
985: int i = 0;
986:
987: wait_more:
988: i++;
1.1.1.2 root 989: main_loop_wait(true);
1.1 root 990: xfb = xen_be_find_xendev("vfb", domid, 0);
991: xin = xen_be_find_xendev("vkbd", domid, 0);
992: if (!xfb || !xin) {
1.1.1.2 root 993: if (i < 256) {
994: usleep(10000);
1.1 root 995: goto wait_more;
1.1.1.2 root 996: }
1.1 root 997: xen_be_printf(NULL, 1, "displaystate setup failed\n");
998: return;
999: }
1000:
1001: /* vfb */
1002: fb = container_of(xfb, struct XenFB, c.xendev);
1003: fb->c.ds = graphic_console_init(xenfb_update,
1004: xenfb_invalidate,
1005: NULL,
1006: NULL,
1007: fb);
1008: fb->have_console = 1;
1009:
1010: /* vkbd */
1011: in = container_of(xin, struct XenInput, c.xendev);
1012: in->c.ds = fb->c.ds;
1013:
1014: /* retry ->init() */
1015: xen_be_check_state(xin);
1016: xen_be_check_state(xfb);
1017: }
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