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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:
1.1.1.4 ! root 354: static int input_initialise(struct XenDevice *xendev)
1.1 root 355: {
356: struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
357: int rc;
358:
1.1.1.3 root 359: if (!in->c.ds) {
360: char *vfb = xenstore_read_str(NULL, "device/vfb");
361: if (vfb == NULL) {
362: /* there is no vfb, run vkbd on its own */
363: in->c.ds = get_displaystate();
364: } else {
1.1.1.4 ! root 365: g_free(vfb);
1.1.1.3 root 366: xen_be_printf(xendev, 1, "ds not set (yet)\n");
367: return -1;
368: }
369: }
370:
1.1 root 371: rc = common_bind(&in->c);
372: if (rc != 0)
373: return rc;
374:
375: qemu_add_kbd_event_handler(xenfb_key_event, in);
1.1.1.4 ! root 376: return 0;
! 377: }
! 378:
! 379: static void input_connected(struct XenDevice *xendev)
! 380: {
! 381: struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
! 382:
! 383: if (xenstore_read_fe_int(xendev, "request-abs-pointer",
! 384: &in->abs_pointer_wanted) == -1) {
! 385: in->abs_pointer_wanted = 0;
! 386: }
! 387:
! 388: if (in->qmouse) {
! 389: qemu_remove_mouse_event_handler(in->qmouse);
! 390: }
1.1 root 391: in->qmouse = qemu_add_mouse_event_handler(xenfb_mouse_event, in,
392: in->abs_pointer_wanted,
393: "Xen PVFB Mouse");
394: }
395:
396: static void input_disconnect(struct XenDevice *xendev)
397: {
398: struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
399:
400: if (in->qmouse) {
401: qemu_remove_mouse_event_handler(in->qmouse);
402: in->qmouse = NULL;
403: }
404: qemu_add_kbd_event_handler(NULL, NULL);
405: common_unbind(&in->c);
406: }
407:
408: static void input_event(struct XenDevice *xendev)
409: {
410: struct XenInput *xenfb = container_of(xendev, struct XenInput, c.xendev);
411: struct xenkbd_page *page = xenfb->c.page;
412:
413: /* We don't understand any keyboard events, so just ignore them. */
414: if (page->out_prod == page->out_cons)
415: return;
416: page->out_cons = page->out_prod;
417: xen_be_send_notify(&xenfb->c.xendev);
418: }
419:
420: /* -------------------------------------------------------------------- */
421:
422: static void xenfb_copy_mfns(int mode, int count, unsigned long *dst, void *src)
423: {
424: uint32_t *src32 = src;
425: uint64_t *src64 = src;
426: int i;
427:
428: for (i = 0; i < count; i++)
429: dst[i] = (mode == 32) ? src32[i] : src64[i];
430: }
431:
432: static int xenfb_map_fb(struct XenFB *xenfb)
433: {
434: struct xenfb_page *page = xenfb->c.page;
435: char *protocol = xenfb->c.xendev.protocol;
436: int n_fbdirs;
437: unsigned long *pgmfns = NULL;
438: unsigned long *fbmfns = NULL;
439: void *map, *pd;
440: int mode, ret = -1;
441:
442: /* default to native */
443: pd = page->pd;
444: mode = sizeof(unsigned long) * 8;
445:
446: if (!protocol) {
447: /*
448: * Undefined protocol, some guesswork needed.
449: *
450: * Old frontends which don't set the protocol use
451: * one page directory only, thus pd[1] must be zero.
452: * pd[1] of the 32bit struct layout and the lower
453: * 32 bits of pd[0] of the 64bit struct layout have
454: * the same location, so we can check that ...
455: */
456: uint32_t *ptr32 = NULL;
457: uint32_t *ptr64 = NULL;
458: #if defined(__i386__)
459: ptr32 = (void*)page->pd;
460: ptr64 = ((void*)page->pd) + 4;
461: #elif defined(__x86_64__)
462: ptr32 = ((void*)page->pd) - 4;
463: ptr64 = (void*)page->pd;
464: #endif
465: if (ptr32) {
466: if (ptr32[1] == 0) {
467: mode = 32;
468: pd = ptr32;
469: } else {
470: mode = 64;
471: pd = ptr64;
472: }
473: }
474: #if defined(__x86_64__)
475: } else if (strcmp(protocol, XEN_IO_PROTO_ABI_X86_32) == 0) {
476: /* 64bit dom0, 32bit domU */
477: mode = 32;
478: pd = ((void*)page->pd) - 4;
479: #elif defined(__i386__)
480: } else if (strcmp(protocol, XEN_IO_PROTO_ABI_X86_64) == 0) {
481: /* 32bit dom0, 64bit domU */
482: mode = 64;
483: pd = ((void*)page->pd) + 4;
484: #endif
485: }
486:
487: if (xenfb->pixels) {
488: munmap(xenfb->pixels, xenfb->fbpages * XC_PAGE_SIZE);
489: xenfb->pixels = NULL;
490: }
491:
492: xenfb->fbpages = (xenfb->fb_len + (XC_PAGE_SIZE - 1)) / XC_PAGE_SIZE;
493: n_fbdirs = xenfb->fbpages * mode / 8;
494: n_fbdirs = (n_fbdirs + (XC_PAGE_SIZE - 1)) / XC_PAGE_SIZE;
495:
1.1.1.4 ! root 496: pgmfns = g_malloc0(sizeof(unsigned long) * n_fbdirs);
! 497: fbmfns = g_malloc0(sizeof(unsigned long) * xenfb->fbpages);
1.1 root 498:
499: xenfb_copy_mfns(mode, n_fbdirs, pgmfns, pd);
500: map = xc_map_foreign_pages(xen_xc, xenfb->c.xendev.dom,
501: PROT_READ, pgmfns, n_fbdirs);
502: if (map == NULL)
503: goto out;
504: xenfb_copy_mfns(mode, xenfb->fbpages, fbmfns, map);
505: munmap(map, n_fbdirs * XC_PAGE_SIZE);
506:
507: xenfb->pixels = xc_map_foreign_pages(xen_xc, xenfb->c.xendev.dom,
508: PROT_READ | PROT_WRITE, fbmfns, xenfb->fbpages);
509: if (xenfb->pixels == NULL)
510: goto out;
511:
512: ret = 0; /* all is fine */
513:
514: out:
1.1.1.4 ! root 515: g_free(pgmfns);
! 516: g_free(fbmfns);
1.1 root 517: return ret;
518: }
519:
520: static int xenfb_configure_fb(struct XenFB *xenfb, size_t fb_len_lim,
521: int width, int height, int depth,
522: size_t fb_len, int offset, int row_stride)
523: {
524: size_t mfn_sz = sizeof(*((struct xenfb_page *)0)->pd);
525: size_t pd_len = sizeof(((struct xenfb_page *)0)->pd) / mfn_sz;
526: size_t fb_pages = pd_len * XC_PAGE_SIZE / mfn_sz;
527: size_t fb_len_max = fb_pages * XC_PAGE_SIZE;
528: int max_width, max_height;
529:
530: if (fb_len_lim > fb_len_max) {
531: xen_be_printf(&xenfb->c.xendev, 0, "fb size limit %zu exceeds %zu, corrected\n",
532: fb_len_lim, fb_len_max);
533: fb_len_lim = fb_len_max;
534: }
535: if (fb_len_lim && fb_len > fb_len_lim) {
536: xen_be_printf(&xenfb->c.xendev, 0, "frontend fb size %zu limited to %zu\n",
537: fb_len, fb_len_lim);
538: fb_len = fb_len_lim;
539: }
540: if (depth != 8 && depth != 16 && depth != 24 && depth != 32) {
541: xen_be_printf(&xenfb->c.xendev, 0, "can't handle frontend fb depth %d\n",
542: depth);
543: return -1;
544: }
545: if (row_stride <= 0 || row_stride > fb_len) {
546: xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend stride %d\n", row_stride);
547: return -1;
548: }
549: max_width = row_stride / (depth / 8);
550: if (width < 0 || width > max_width) {
551: xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend width %d limited to %d\n",
552: width, max_width);
553: width = max_width;
554: }
555: if (offset < 0 || offset >= fb_len) {
556: xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend offset %d (max %zu)\n",
557: offset, fb_len - 1);
558: return -1;
559: }
560: max_height = (fb_len - offset) / row_stride;
561: if (height < 0 || height > max_height) {
562: xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend height %d limited to %d\n",
563: height, max_height);
564: height = max_height;
565: }
566: xenfb->fb_len = fb_len;
567: xenfb->row_stride = row_stride;
568: xenfb->depth = depth;
569: xenfb->width = width;
570: xenfb->height = height;
571: xenfb->offset = offset;
572: xenfb->up_fullscreen = 1;
573: xenfb->do_resize = 1;
574: xen_be_printf(&xenfb->c.xendev, 1, "framebuffer %dx%dx%d offset %d stride %d\n",
575: width, height, depth, offset, row_stride);
576: return 0;
577: }
578:
579: /* A convenient function for munging pixels between different depths */
580: #define BLT(SRC_T,DST_T,RSB,GSB,BSB,RDB,GDB,BDB) \
581: for (line = y ; line < (y+h) ; line++) { \
582: SRC_T *src = (SRC_T *)(xenfb->pixels \
583: + xenfb->offset \
584: + (line * xenfb->row_stride) \
585: + (x * xenfb->depth / 8)); \
586: DST_T *dst = (DST_T *)(data \
587: + (line * linesize) \
588: + (x * bpp / 8)); \
589: int col; \
590: const int RSS = 32 - (RSB + GSB + BSB); \
591: const int GSS = 32 - (GSB + BSB); \
592: const int BSS = 32 - (BSB); \
593: const uint32_t RSM = (~0U) << (32 - RSB); \
594: const uint32_t GSM = (~0U) << (32 - GSB); \
595: const uint32_t BSM = (~0U) << (32 - BSB); \
596: const int RDS = 32 - (RDB + GDB + BDB); \
597: const int GDS = 32 - (GDB + BDB); \
598: const int BDS = 32 - (BDB); \
599: const uint32_t RDM = (~0U) << (32 - RDB); \
600: const uint32_t GDM = (~0U) << (32 - GDB); \
601: const uint32_t BDM = (~0U) << (32 - BDB); \
602: for (col = x ; col < (x+w) ; col++) { \
603: uint32_t spix = *src; \
604: *dst = (((spix << RSS) & RSM & RDM) >> RDS) | \
605: (((spix << GSS) & GSM & GDM) >> GDS) | \
606: (((spix << BSS) & BSM & BDM) >> BDS); \
607: src = (SRC_T *) ((unsigned long) src + xenfb->depth / 8); \
608: dst = (DST_T *) ((unsigned long) dst + bpp / 8); \
609: } \
610: }
611:
612:
613: /*
614: * This copies data from the guest framebuffer region, into QEMU's
615: * displaysurface. qemu uses 16 or 32 bpp. In case the pv framebuffer
616: * uses something else we must convert and copy, otherwise we can
617: * supply the buffer directly and no thing here.
618: */
619: static void xenfb_guest_copy(struct XenFB *xenfb, int x, int y, int w, int h)
620: {
621: int line, oops = 0;
622: int bpp = ds_get_bits_per_pixel(xenfb->c.ds);
623: int linesize = ds_get_linesize(xenfb->c.ds);
624: uint8_t *data = ds_get_data(xenfb->c.ds);
625:
626: if (!is_buffer_shared(xenfb->c.ds->surface)) {
627: switch (xenfb->depth) {
628: case 8:
629: if (bpp == 16) {
630: BLT(uint8_t, uint16_t, 3, 3, 2, 5, 6, 5);
631: } else if (bpp == 32) {
632: BLT(uint8_t, uint32_t, 3, 3, 2, 8, 8, 8);
633: } else {
634: oops = 1;
635: }
636: break;
637: case 24:
638: if (bpp == 16) {
639: BLT(uint32_t, uint16_t, 8, 8, 8, 5, 6, 5);
640: } else if (bpp == 32) {
641: BLT(uint32_t, uint32_t, 8, 8, 8, 8, 8, 8);
642: } else {
643: oops = 1;
644: }
645: break;
646: default:
647: oops = 1;
648: }
649: }
650: if (oops) /* should not happen */
651: xen_be_printf(&xenfb->c.xendev, 0, "%s: oops: convert %d -> %d bpp?\n",
652: __FUNCTION__, xenfb->depth, bpp);
653:
654: dpy_update(xenfb->c.ds, x, y, w, h);
655: }
656:
657: #ifdef XENFB_TYPE_REFRESH_PERIOD
658: static int xenfb_queue_full(struct XenFB *xenfb)
659: {
660: struct xenfb_page *page = xenfb->c.page;
661: uint32_t cons, prod;
662:
663: if (!page)
664: return 1;
665:
666: prod = page->in_prod;
667: cons = page->in_cons;
668: return prod - cons == XENFB_IN_RING_LEN;
669: }
670:
671: static void xenfb_send_event(struct XenFB *xenfb, union xenfb_in_event *event)
672: {
673: uint32_t prod;
674: struct xenfb_page *page = xenfb->c.page;
675:
676: prod = page->in_prod;
677: /* caller ensures !xenfb_queue_full() */
678: xen_mb(); /* ensure ring space available */
679: XENFB_IN_RING_REF(page, prod) = *event;
680: xen_wmb(); /* ensure ring contents visible */
681: page->in_prod = prod + 1;
682:
683: xen_be_send_notify(&xenfb->c.xendev);
684: }
685:
686: static void xenfb_send_refresh_period(struct XenFB *xenfb, int period)
687: {
688: union xenfb_in_event event;
689:
690: memset(&event, 0, sizeof(event));
691: event.type = XENFB_TYPE_REFRESH_PERIOD;
692: event.refresh_period.period = period;
693: xenfb_send_event(xenfb, &event);
694: }
695: #endif
696:
697: /*
698: * Periodic update of display.
699: * Also transmit the refresh interval to the frontend.
700: *
701: * Never ever do any qemu display operations
702: * (resize, screen update) outside this function.
703: * Our screen might be inactive. When asked for
704: * an update we know it is active.
705: */
706: static void xenfb_update(void *opaque)
707: {
708: struct XenFB *xenfb = opaque;
709: int i;
710:
711: if (xenfb->c.xendev.be_state != XenbusStateConnected)
712: return;
713:
714: if (xenfb->feature_update) {
715: #ifdef XENFB_TYPE_REFRESH_PERIOD
716: struct DisplayChangeListener *l;
717: int period = 99999999;
718: int idle = 1;
719:
720: if (xenfb_queue_full(xenfb))
721: return;
722:
723: for (l = xenfb->c.ds->listeners; l != NULL; l = l->next) {
724: if (l->idle)
725: continue;
726: idle = 0;
727: if (!l->gui_timer_interval) {
728: if (period > GUI_REFRESH_INTERVAL)
729: period = GUI_REFRESH_INTERVAL;
730: } else {
731: if (period > l->gui_timer_interval)
732: period = l->gui_timer_interval;
733: }
734: }
735: if (idle)
736: period = XENFB_NO_REFRESH;
737:
738: if (xenfb->refresh_period != period) {
739: xenfb_send_refresh_period(xenfb, period);
740: xenfb->refresh_period = period;
741: xen_be_printf(&xenfb->c.xendev, 1, "refresh period: %d\n", period);
742: }
743: #else
744: ; /* nothing */
745: #endif
746: } else {
747: /* we don't get update notifications, thus use the
748: * sledge hammer approach ... */
749: xenfb->up_fullscreen = 1;
750: }
751:
752: /* resize if needed */
753: if (xenfb->do_resize) {
754: xenfb->do_resize = 0;
755: switch (xenfb->depth) {
756: case 16:
757: case 32:
758: /* console.c supported depth -> buffer can be used directly */
759: qemu_free_displaysurface(xenfb->c.ds);
760: xenfb->c.ds->surface = qemu_create_displaysurface_from
761: (xenfb->width, xenfb->height, xenfb->depth,
762: xenfb->row_stride, xenfb->pixels + xenfb->offset);
763: break;
764: default:
765: /* we must convert stuff */
766: qemu_resize_displaysurface(xenfb->c.ds, xenfb->width, xenfb->height);
767: break;
768: }
769: xen_be_printf(&xenfb->c.xendev, 1, "update: resizing: %dx%d @ %d bpp%s\n",
770: xenfb->width, xenfb->height, xenfb->depth,
771: is_buffer_shared(xenfb->c.ds->surface) ? " (shared)" : "");
772: dpy_resize(xenfb->c.ds);
773: xenfb->up_fullscreen = 1;
774: }
775:
776: /* run queued updates */
777: if (xenfb->up_fullscreen) {
778: xen_be_printf(&xenfb->c.xendev, 3, "update: fullscreen\n");
779: xenfb_guest_copy(xenfb, 0, 0, xenfb->width, xenfb->height);
780: } else if (xenfb->up_count) {
781: xen_be_printf(&xenfb->c.xendev, 3, "update: %d rects\n", xenfb->up_count);
782: for (i = 0; i < xenfb->up_count; i++)
783: xenfb_guest_copy(xenfb,
784: xenfb->up_rects[i].x,
785: xenfb->up_rects[i].y,
786: xenfb->up_rects[i].w,
787: xenfb->up_rects[i].h);
788: } else {
789: xen_be_printf(&xenfb->c.xendev, 3, "update: nothing\n");
790: }
791: xenfb->up_count = 0;
792: xenfb->up_fullscreen = 0;
793: }
794:
795: /* QEMU display state changed, so refresh the framebuffer copy */
796: static void xenfb_invalidate(void *opaque)
797: {
798: struct XenFB *xenfb = opaque;
799: xenfb->up_fullscreen = 1;
800: }
801:
802: static void xenfb_handle_events(struct XenFB *xenfb)
803: {
804: uint32_t prod, cons;
805: struct xenfb_page *page = xenfb->c.page;
806:
807: prod = page->out_prod;
808: if (prod == page->out_cons)
809: return;
810: xen_rmb(); /* ensure we see ring contents up to prod */
811: for (cons = page->out_cons; cons != prod; cons++) {
812: union xenfb_out_event *event = &XENFB_OUT_RING_REF(page, cons);
813: int x, y, w, h;
814:
815: switch (event->type) {
816: case XENFB_TYPE_UPDATE:
817: if (xenfb->up_count == UP_QUEUE)
818: xenfb->up_fullscreen = 1;
819: if (xenfb->up_fullscreen)
820: break;
821: x = MAX(event->update.x, 0);
822: y = MAX(event->update.y, 0);
823: w = MIN(event->update.width, xenfb->width - x);
824: h = MIN(event->update.height, xenfb->height - y);
825: if (w < 0 || h < 0) {
826: xen_be_printf(&xenfb->c.xendev, 1, "bogus update ignored\n");
827: break;
828: }
829: if (x != event->update.x ||
830: y != event->update.y ||
831: w != event->update.width ||
832: h != event->update.height) {
833: xen_be_printf(&xenfb->c.xendev, 1, "bogus update clipped\n");
834: }
835: if (w == xenfb->width && h > xenfb->height / 2) {
836: /* scroll detector: updated more than 50% of the lines,
837: * don't bother keeping track of the rectangles then */
838: xenfb->up_fullscreen = 1;
839: } else {
840: xenfb->up_rects[xenfb->up_count].x = x;
841: xenfb->up_rects[xenfb->up_count].y = y;
842: xenfb->up_rects[xenfb->up_count].w = w;
843: xenfb->up_rects[xenfb->up_count].h = h;
844: xenfb->up_count++;
845: }
846: break;
847: #ifdef XENFB_TYPE_RESIZE
848: case XENFB_TYPE_RESIZE:
849: if (xenfb_configure_fb(xenfb, xenfb->fb_len,
850: event->resize.width,
851: event->resize.height,
852: event->resize.depth,
853: xenfb->fb_len,
854: event->resize.offset,
855: event->resize.stride) < 0)
856: break;
857: xenfb_invalidate(xenfb);
858: break;
859: #endif
860: }
861: }
862: xen_mb(); /* ensure we're done with ring contents */
863: page->out_cons = cons;
864: }
865:
866: static int fb_init(struct XenDevice *xendev)
867: {
868: struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
869:
870: fb->refresh_period = -1;
871:
872: #ifdef XENFB_TYPE_RESIZE
873: xenstore_write_be_int(xendev, "feature-resize", 1);
874: #endif
875: return 0;
876: }
877:
1.1.1.4 ! root 878: static int fb_initialise(struct XenDevice *xendev)
1.1 root 879: {
880: struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
881: struct xenfb_page *fb_page;
882: int videoram;
883: int rc;
884:
885: if (xenstore_read_fe_int(xendev, "videoram", &videoram) == -1)
886: videoram = 0;
887:
888: rc = common_bind(&fb->c);
889: if (rc != 0)
890: return rc;
891:
892: fb_page = fb->c.page;
893: rc = xenfb_configure_fb(fb, videoram * 1024 * 1024U,
894: fb_page->width, fb_page->height, fb_page->depth,
895: fb_page->mem_length, 0, fb_page->line_length);
896: if (rc != 0)
897: return rc;
898:
899: rc = xenfb_map_fb(fb);
900: if (rc != 0)
901: return rc;
902:
903: #if 0 /* handled in xen_init_display() for now */
904: if (!fb->have_console) {
905: fb->c.ds = graphic_console_init(xenfb_update,
906: xenfb_invalidate,
907: NULL,
908: NULL,
909: fb);
910: fb->have_console = 1;
911: }
912: #endif
913:
914: if (xenstore_read_fe_int(xendev, "feature-update", &fb->feature_update) == -1)
915: fb->feature_update = 0;
916: if (fb->feature_update)
917: xenstore_write_be_int(xendev, "request-update", 1);
918:
919: xen_be_printf(xendev, 1, "feature-update=%d, videoram=%d\n",
920: fb->feature_update, videoram);
921: return 0;
922: }
923:
924: static void fb_disconnect(struct XenDevice *xendev)
925: {
926: struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
927:
928: /*
929: * FIXME: qemu can't un-init gfx display (yet?).
930: * Replacing the framebuffer with anonymous shared memory
931: * instead. This releases the guest pages and keeps qemu happy.
932: */
933: fb->pixels = mmap(fb->pixels, fb->fbpages * XC_PAGE_SIZE,
934: PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANON,
935: -1, 0);
936: common_unbind(&fb->c);
937: fb->feature_update = 0;
938: fb->bug_trigger = 0;
939: }
940:
941: static void fb_frontend_changed(struct XenDevice *xendev, const char *node)
942: {
943: struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev);
944:
945: /*
946: * Set state to Connected *again* once the frontend switched
947: * to connected. We must trigger the watch a second time to
948: * workaround a frontend bug.
949: */
950: if (fb->bug_trigger == 0 && strcmp(node, "state") == 0 &&
951: xendev->fe_state == XenbusStateConnected &&
952: xendev->be_state == XenbusStateConnected) {
953: xen_be_printf(xendev, 2, "re-trigger connected (frontend bug)\n");
954: xen_be_set_state(xendev, XenbusStateConnected);
955: fb->bug_trigger = 1; /* only once */
956: }
957: }
958:
959: static void fb_event(struct XenDevice *xendev)
960: {
961: struct XenFB *xenfb = container_of(xendev, struct XenFB, c.xendev);
962:
963: xenfb_handle_events(xenfb);
964: xen_be_send_notify(&xenfb->c.xendev);
965: }
966:
967: /* -------------------------------------------------------------------- */
968:
969: struct XenDevOps xen_kbdmouse_ops = {
970: .size = sizeof(struct XenInput),
971: .init = input_init,
1.1.1.4 ! root 972: .initialise = input_initialise,
! 973: .connected = input_connected,
1.1 root 974: .disconnect = input_disconnect,
975: .event = input_event,
976: };
977:
978: struct XenDevOps xen_framebuffer_ops = {
979: .size = sizeof(struct XenFB),
980: .init = fb_init,
1.1.1.4 ! root 981: .initialise = fb_initialise,
1.1 root 982: .disconnect = fb_disconnect,
983: .event = fb_event,
984: .frontend_changed = fb_frontend_changed,
985: };
986:
987: /*
988: * FIXME/TODO: Kill this.
989: * Temporary needed while DisplayState reorganization is in flight.
990: */
991: void xen_init_display(int domid)
992: {
993: struct XenDevice *xfb, *xin;
994: struct XenFB *fb;
995: struct XenInput *in;
996: int i = 0;
997:
998: wait_more:
999: i++;
1.1.1.2 root 1000: main_loop_wait(true);
1.1 root 1001: xfb = xen_be_find_xendev("vfb", domid, 0);
1002: xin = xen_be_find_xendev("vkbd", domid, 0);
1003: if (!xfb || !xin) {
1.1.1.2 root 1004: if (i < 256) {
1005: usleep(10000);
1.1 root 1006: goto wait_more;
1.1.1.2 root 1007: }
1.1 root 1008: xen_be_printf(NULL, 1, "displaystate setup failed\n");
1009: return;
1010: }
1011:
1012: /* vfb */
1013: fb = container_of(xfb, struct XenFB, c.xendev);
1014: fb->c.ds = graphic_console_init(xenfb_update,
1015: xenfb_invalidate,
1016: NULL,
1017: NULL,
1018: fb);
1019: fb->have_console = 1;
1020:
1021: /* vkbd */
1022: in = container_of(xin, struct XenInput, c.xendev);
1023: in->c.ds = fb->c.ds;
1024:
1025: /* retry ->init() */
1026: xen_be_check_state(xin);
1027: xen_be_check_state(xfb);
1028: }
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