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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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