/* * xen paravirt framebuffer backend * * Copyright IBM, Corp. 2005-2006 * Copyright Red Hat, Inc. 2006-2008 * * Authors: * Anthony Liguori <aliguori@us.ibm.com>, * Markus Armbruster <armbru@redhat.com>, * Daniel P. Berrange <berrange@redhat.com>, * Pat Campbell <plc@novell.com>, * Gerd Hoffmann <kraxel@redhat.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; under version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, see <http://www.gnu.org/licenses/>. */ #include <stdarg.h> #include <stdlib.h> #include <sys/types.h> #include <fcntl.h> #include <unistd.h> #include <sys/mman.h> #include <errno.h> #include <stdio.h> #include <string.h> #include <time.h> #include <xs.h> #include <xenctrl.h> #include <xen/event_channel.h> #include <xen/io/xenbus.h> #include <xen/io/fbif.h> #include <xen/io/kbdif.h> #include <xen/io/protocols.h> #include "hw.h" #include "sysemu.h" #include "console.h" #include "qemu-char.h" #include "xen_backend.h" #ifndef BTN_LEFT #define BTN_LEFT 0x110 /* from <linux/input.h> */ #endif /* -------------------------------------------------------------------- */ struct common { struct XenDevice xendev; /* must be first */ void *page; DisplayState *ds; }; struct XenInput { struct common c; int abs_pointer_wanted; /* Whether guest supports absolute pointer */ int button_state; /* Last seen pointer button state */ int extended; QEMUPutMouseEntry *qmouse; }; #define UP_QUEUE 8 struct XenFB { struct common c; size_t fb_len; int row_stride; int depth; int width; int height; int offset; void *pixels; int fbpages; int feature_update; int refresh_period; int bug_trigger; int have_console; int do_resize; struct { int x,y,w,h; } up_rects[UP_QUEUE]; int up_count; int up_fullscreen; }; /* -------------------------------------------------------------------- */ static int common_bind(struct common *c) { int mfn; if (xenstore_read_fe_int(&c->xendev, "page-ref", &mfn) == -1) return -1; if (xenstore_read_fe_int(&c->xendev, "event-channel", &c->xendev.remote_port) == -1) return -1; c->page = xc_map_foreign_range(xen_xc, c->xendev.dom, XC_PAGE_SIZE, PROT_READ | PROT_WRITE, mfn); if (c->page == NULL) return -1; xen_be_bind_evtchn(&c->xendev); xen_be_printf(&c->xendev, 1, "ring mfn %d, remote-port %d, local-port %d\n", mfn, c->xendev.remote_port, c->xendev.local_port); return 0; } static void common_unbind(struct common *c) { xen_be_unbind_evtchn(&c->xendev); if (c->page) { munmap(c->page, XC_PAGE_SIZE); c->page = NULL; } } /* -------------------------------------------------------------------- */ #if 0 /* * These two tables are not needed any more, but left in here * intentionally as documentation, to show how scancode2linux[] * was generated. * * Tables to map from scancode to Linux input layer keycode. * Scancodes are hardware-specific. These maps assumes a * standard AT or PS/2 keyboard which is what QEMU feeds us. */ const unsigned char atkbd_set2_keycode[512] = { 0, 67, 65, 63, 61, 59, 60, 88, 0, 68, 66, 64, 62, 15, 41,117, 0, 56, 42, 93, 29, 16, 2, 0, 0, 0, 44, 31, 30, 17, 3, 0, 0, 46, 45, 32, 18, 5, 4, 95, 0, 57, 47, 33, 20, 19, 6,183, 0, 49, 48, 35, 34, 21, 7,184, 0, 0, 50, 36, 22, 8, 9,185, 0, 51, 37, 23, 24, 11, 10, 0, 0, 52, 53, 38, 39, 25, 12, 0, 0, 89, 40, 0, 26, 13, 0, 0, 58, 54, 28, 27, 0, 43, 0, 85, 0, 86, 91, 90, 92, 0, 14, 94, 0, 79,124, 75, 71,121, 0, 0, 82, 83, 80, 76, 77, 72, 1, 69, 87, 78, 81, 74, 55, 73, 70, 99, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 217,100,255, 0, 97,165, 0, 0,156, 0, 0, 0, 0, 0, 0,125, 173,114, 0,113, 0, 0, 0,126,128, 0, 0,140, 0, 0, 0,127, 159, 0,115, 0,164, 0, 0,116,158, 0,150,166, 0, 0, 0,142, 157, 0, 0, 0, 0, 0, 0, 0,155, 0, 98, 0, 0,163, 0, 0, 226, 0, 0, 0, 0, 0, 0, 0, 0,255, 96, 0, 0, 0,143, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,107, 0,105,102, 0, 0,112, 110,111,108,112,106,103, 0,119, 0,118,109, 0, 99,104,119, 0, }; const unsigned char atkbd_unxlate_table[128] = { 0,118, 22, 30, 38, 37, 46, 54, 61, 62, 70, 69, 78, 85,102, 13, 21, 29, 36, 45, 44, 53, 60, 67, 68, 77, 84, 91, 90, 20, 28, 27, 35, 43, 52, 51, 59, 66, 75, 76, 82, 14, 18, 93, 26, 34, 33, 42, 50, 49, 58, 65, 73, 74, 89,124, 17, 41, 88, 5, 6, 4, 12, 3, 11, 2, 10, 1, 9,119,126,108,117,125,123,107,115,116,121,105, 114,122,112,113,127, 96, 97,120, 7, 15, 23, 31, 39, 47, 55, 63, 71, 79, 86, 94, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 87,111, 19, 25, 57, 81, 83, 92, 95, 98, 99,100,101,103,104,106,109,110 }; #endif /* * for (i = 0; i < 128; i++) { * scancode2linux[i] = atkbd_set2_keycode[atkbd_unxlate_table[i]]; * scancode2linux[i | 0x80] = atkbd_set2_keycode[atkbd_unxlate_table[i] | 0x80]; * } */ static const unsigned char scancode2linux[512] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 99, 0, 86, 87, 88,117, 0, 0, 95,183,184,185, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 93, 0, 0, 89, 0, 0, 85, 91, 90, 92, 0, 94, 0,124,121, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 165, 0, 0, 0, 0, 0, 0, 0, 0,163, 0, 0, 96, 97, 0, 0, 113,140,164, 0,166, 0, 0, 0, 0, 0,255, 0, 0, 0,114, 0, 115, 0,150, 0, 0, 98,255, 99,100, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,119,119,102,103,104, 0,105,112,106,118,107, 108,109,110,111, 0, 0, 0, 0, 0, 0, 0,125,126,127,116,142, 0, 0, 0,143, 0,217,156,173,128,159,158,157,155,226, 0,112, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }; /* Send an event to the keyboard frontend driver */ static int xenfb_kbd_event(struct XenInput *xenfb, union xenkbd_in_event *event) { struct xenkbd_page *page = xenfb->c.page; uint32_t prod; if (xenfb->c.xendev.be_state != XenbusStateConnected) return 0; if (!page) return 0; prod = page->in_prod; if (prod - page->in_cons == XENKBD_IN_RING_LEN) { errno = EAGAIN; return -1; } xen_mb(); /* ensure ring space available */ XENKBD_IN_RING_REF(page, prod) = *event; xen_wmb(); /* ensure ring contents visible */ page->in_prod = prod + 1; return xen_be_send_notify(&xenfb->c.xendev); } /* Send a keyboard (or mouse button) event */ static int xenfb_send_key(struct XenInput *xenfb, bool down, int keycode) { union xenkbd_in_event event; memset(&event, 0, XENKBD_IN_EVENT_SIZE); event.type = XENKBD_TYPE_KEY; event.key.pressed = down ? 1 : 0; event.key.keycode = keycode; return xenfb_kbd_event(xenfb, &event); } /* Send a relative mouse movement event */ static int xenfb_send_motion(struct XenInput *xenfb, int rel_x, int rel_y, int rel_z) { union xenkbd_in_event event; memset(&event, 0, XENKBD_IN_EVENT_SIZE); event.type = XENKBD_TYPE_MOTION; event.motion.rel_x = rel_x; event.motion.rel_y = rel_y; #if __XEN_LATEST_INTERFACE_VERSION__ >= 0x00030207 event.motion.rel_z = rel_z; #endif return xenfb_kbd_event(xenfb, &event); } /* Send an absolute mouse movement event */ static int xenfb_send_position(struct XenInput *xenfb, int abs_x, int abs_y, int z) { union xenkbd_in_event event; memset(&event, 0, XENKBD_IN_EVENT_SIZE); event.type = XENKBD_TYPE_POS; event.pos.abs_x = abs_x; event.pos.abs_y = abs_y; #if __XEN_LATEST_INTERFACE_VERSION__ == 0x00030207 event.pos.abs_z = z; #endif #if __XEN_LATEST_INTERFACE_VERSION__ >= 0x00030208 event.pos.rel_z = z; #endif return xenfb_kbd_event(xenfb, &event); } /* * Send a key event from the client to the guest OS * QEMU gives us a raw scancode from an AT / PS/2 style keyboard. * We have to turn this into a Linux Input layer keycode. * * Extra complexity from the fact that with extended scancodes * (like those produced by arrow keys) this method gets called * twice, but we only want to send a single event. So we have to * track the '0xe0' scancode state & collapse the extended keys * as needed. * * Wish we could just send scancodes straight to the guest which * already has code for dealing with this... */ static void xenfb_key_event(void *opaque, int scancode) { struct XenInput *xenfb = opaque; int down = 1; if (scancode == 0xe0) { xenfb->extended = 1; return; } else if (scancode & 0x80) { scancode &= 0x7f; down = 0; } if (xenfb->extended) { scancode |= 0x80; xenfb->extended = 0; } xenfb_send_key(xenfb, down, scancode2linux[scancode]); } /* * Send a mouse event from the client to the guest OS * * The QEMU mouse can be in either relative, or absolute mode. * Movement is sent separately from button state, which has to * be encoded as virtual key events. We also don't actually get * given any button up/down events, so have to track changes in * the button state. */ static void xenfb_mouse_event(void *opaque, int dx, int dy, int dz, int button_state) { struct XenInput *xenfb = opaque; int dw = ds_get_width(xenfb->c.ds); int dh = ds_get_height(xenfb->c.ds); int i; if (xenfb->abs_pointer_wanted) xenfb_send_position(xenfb, dx * (dw - 1) / 0x7fff, dy * (dh - 1) / 0x7fff, dz); else xenfb_send_motion(xenfb, dx, dy, dz); for (i = 0 ; i < 8 ; i++) { int lastDown = xenfb->button_state & (1 << i); int down = button_state & (1 << i); if (down == lastDown) continue; if (xenfb_send_key(xenfb, down, BTN_LEFT+i) < 0) return; } xenfb->button_state = button_state; } static int input_init(struct XenDevice *xendev) { struct XenInput *in = container_of(xendev, struct XenInput, c.xendev); if (!in->c.ds) { xen_be_printf(xendev, 1, "ds not set (yet)\n"); return -1; } xenstore_write_be_int(xendev, "feature-abs-pointer", 1); return 0; } static int input_connect(struct XenDevice *xendev) { struct XenInput *in = container_of(xendev, struct XenInput, c.xendev); int rc; if (xenstore_read_fe_int(xendev, "request-abs-pointer", &in->abs_pointer_wanted) == -1) in->abs_pointer_wanted = 0; rc = common_bind(&in->c); if (rc != 0) return rc; qemu_add_kbd_event_handler(xenfb_key_event, in); in->qmouse = qemu_add_mouse_event_handler(xenfb_mouse_event, in, in->abs_pointer_wanted, "Xen PVFB Mouse"); return 0; } static void input_disconnect(struct XenDevice *xendev) { struct XenInput *in = container_of(xendev, struct XenInput, c.xendev); if (in->qmouse) { qemu_remove_mouse_event_handler(in->qmouse); in->qmouse = NULL; } qemu_add_kbd_event_handler(NULL, NULL); common_unbind(&in->c); } static void input_event(struct XenDevice *xendev) { struct XenInput *xenfb = container_of(xendev, struct XenInput, c.xendev); struct xenkbd_page *page = xenfb->c.page; /* We don't understand any keyboard events, so just ignore them. */ if (page->out_prod == page->out_cons) return; page->out_cons = page->out_prod; xen_be_send_notify(&xenfb->c.xendev); } /* -------------------------------------------------------------------- */ static void xenfb_copy_mfns(int mode, int count, unsigned long *dst, void *src) { uint32_t *src32 = src; uint64_t *src64 = src; int i; for (i = 0; i < count; i++) dst[i] = (mode == 32) ? src32[i] : src64[i]; } static int xenfb_map_fb(struct XenFB *xenfb) { struct xenfb_page *page = xenfb->c.page; char *protocol = xenfb->c.xendev.protocol; int n_fbdirs; unsigned long *pgmfns = NULL; unsigned long *fbmfns = NULL; void *map, *pd; int mode, ret = -1; /* default to native */ pd = page->pd; mode = sizeof(unsigned long) * 8; if (!protocol) { /* * Undefined protocol, some guesswork needed. * * Old frontends which don't set the protocol use * one page directory only, thus pd[1] must be zero. * pd[1] of the 32bit struct layout and the lower * 32 bits of pd[0] of the 64bit struct layout have * the same location, so we can check that ... */ uint32_t *ptr32 = NULL; uint32_t *ptr64 = NULL; #if defined(__i386__) ptr32 = (void*)page->pd; ptr64 = ((void*)page->pd) + 4; #elif defined(__x86_64__) ptr32 = ((void*)page->pd) - 4; ptr64 = (void*)page->pd; #endif if (ptr32) { if (ptr32[1] == 0) { mode = 32; pd = ptr32; } else { mode = 64; pd = ptr64; } } #if defined(__x86_64__) } else if (strcmp(protocol, XEN_IO_PROTO_ABI_X86_32) == 0) { /* 64bit dom0, 32bit domU */ mode = 32; pd = ((void*)page->pd) - 4; #elif defined(__i386__) } else if (strcmp(protocol, XEN_IO_PROTO_ABI_X86_64) == 0) { /* 32bit dom0, 64bit domU */ mode = 64; pd = ((void*)page->pd) + 4; #endif } if (xenfb->pixels) { munmap(xenfb->pixels, xenfb->fbpages * XC_PAGE_SIZE); xenfb->pixels = NULL; } xenfb->fbpages = (xenfb->fb_len + (XC_PAGE_SIZE - 1)) / XC_PAGE_SIZE; n_fbdirs = xenfb->fbpages * mode / 8; n_fbdirs = (n_fbdirs + (XC_PAGE_SIZE - 1)) / XC_PAGE_SIZE; pgmfns = qemu_mallocz(sizeof(unsigned long) * n_fbdirs); fbmfns = qemu_mallocz(sizeof(unsigned long) * xenfb->fbpages); xenfb_copy_mfns(mode, n_fbdirs, pgmfns, pd); map = xc_map_foreign_pages(xen_xc, xenfb->c.xendev.dom, PROT_READ, pgmfns, n_fbdirs); if (map == NULL) goto out; xenfb_copy_mfns(mode, xenfb->fbpages, fbmfns, map); munmap(map, n_fbdirs * XC_PAGE_SIZE); xenfb->pixels = xc_map_foreign_pages(xen_xc, xenfb->c.xendev.dom, PROT_READ | PROT_WRITE, fbmfns, xenfb->fbpages); if (xenfb->pixels == NULL) goto out; ret = 0; /* all is fine */ out: qemu_free(pgmfns); qemu_free(fbmfns); return ret; } static int xenfb_configure_fb(struct XenFB *xenfb, size_t fb_len_lim, int width, int height, int depth, size_t fb_len, int offset, int row_stride) { size_t mfn_sz = sizeof(*((struct xenfb_page *)0)->pd); size_t pd_len = sizeof(((struct xenfb_page *)0)->pd) / mfn_sz; size_t fb_pages = pd_len * XC_PAGE_SIZE / mfn_sz; size_t fb_len_max = fb_pages * XC_PAGE_SIZE; int max_width, max_height; if (fb_len_lim > fb_len_max) { xen_be_printf(&xenfb->c.xendev, 0, "fb size limit %zu exceeds %zu, corrected\n", fb_len_lim, fb_len_max); fb_len_lim = fb_len_max; } if (fb_len_lim && fb_len > fb_len_lim) { xen_be_printf(&xenfb->c.xendev, 0, "frontend fb size %zu limited to %zu\n", fb_len, fb_len_lim); fb_len = fb_len_lim; } if (depth != 8 && depth != 16 && depth != 24 && depth != 32) { xen_be_printf(&xenfb->c.xendev, 0, "can't handle frontend fb depth %d\n", depth); return -1; } if (row_stride <= 0 || row_stride > fb_len) { xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend stride %d\n", row_stride); return -1; } max_width = row_stride / (depth / 8); if (width < 0 || width > max_width) { xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend width %d limited to %d\n", width, max_width); width = max_width; } if (offset < 0 || offset >= fb_len) { xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend offset %d (max %zu)\n", offset, fb_len - 1); return -1; } max_height = (fb_len - offset) / row_stride; if (height < 0 || height > max_height) { xen_be_printf(&xenfb->c.xendev, 0, "invalid frontend height %d limited to %d\n", height, max_height); height = max_height; } xenfb->fb_len = fb_len; xenfb->row_stride = row_stride; xenfb->depth = depth; xenfb->width = width; xenfb->height = height; xenfb->offset = offset; xenfb->up_fullscreen = 1; xenfb->do_resize = 1; xen_be_printf(&xenfb->c.xendev, 1, "framebuffer %dx%dx%d offset %d stride %d\n", width, height, depth, offset, row_stride); return 0; } /* A convenient function for munging pixels between different depths */ #define BLT(SRC_T,DST_T,RSB,GSB,BSB,RDB,GDB,BDB) \ for (line = y ; line < (y+h) ; line++) { \ SRC_T *src = (SRC_T *)(xenfb->pixels \ + xenfb->offset \ + (line * xenfb->row_stride) \ + (x * xenfb->depth / 8)); \ DST_T *dst = (DST_T *)(data \ + (line * linesize) \ + (x * bpp / 8)); \ int col; \ const int RSS = 32 - (RSB + GSB + BSB); \ const int GSS = 32 - (GSB + BSB); \ const int BSS = 32 - (BSB); \ const uint32_t RSM = (~0U) << (32 - RSB); \ const uint32_t GSM = (~0U) << (32 - GSB); \ const uint32_t BSM = (~0U) << (32 - BSB); \ const int RDS = 32 - (RDB + GDB + BDB); \ const int GDS = 32 - (GDB + BDB); \ const int BDS = 32 - (BDB); \ const uint32_t RDM = (~0U) << (32 - RDB); \ const uint32_t GDM = (~0U) << (32 - GDB); \ const uint32_t BDM = (~0U) << (32 - BDB); \ for (col = x ; col < (x+w) ; col++) { \ uint32_t spix = *src; \ *dst = (((spix << RSS) & RSM & RDM) >> RDS) | \ (((spix << GSS) & GSM & GDM) >> GDS) | \ (((spix << BSS) & BSM & BDM) >> BDS); \ src = (SRC_T *) ((unsigned long) src + xenfb->depth / 8); \ dst = (DST_T *) ((unsigned long) dst + bpp / 8); \ } \ } /* * This copies data from the guest framebuffer region, into QEMU's * displaysurface. qemu uses 16 or 32 bpp. In case the pv framebuffer * uses something else we must convert and copy, otherwise we can * supply the buffer directly and no thing here. */ static void xenfb_guest_copy(struct XenFB *xenfb, int x, int y, int w, int h) { int line, oops = 0; int bpp = ds_get_bits_per_pixel(xenfb->c.ds); int linesize = ds_get_linesize(xenfb->c.ds); uint8_t *data = ds_get_data(xenfb->c.ds); if (!is_buffer_shared(xenfb->c.ds->surface)) { switch (xenfb->depth) { case 8: if (bpp == 16) { BLT(uint8_t, uint16_t, 3, 3, 2, 5, 6, 5); } else if (bpp == 32) { BLT(uint8_t, uint32_t, 3, 3, 2, 8, 8, 8); } else { oops = 1; } break; case 24: if (bpp == 16) { BLT(uint32_t, uint16_t, 8, 8, 8, 5, 6, 5); } else if (bpp == 32) { BLT(uint32_t, uint32_t, 8, 8, 8, 8, 8, 8); } else { oops = 1; } break; default: oops = 1; } } if (oops) /* should not happen */ xen_be_printf(&xenfb->c.xendev, 0, "%s: oops: convert %d -> %d bpp?\n", __FUNCTION__, xenfb->depth, bpp); dpy_update(xenfb->c.ds, x, y, w, h); } #ifdef XENFB_TYPE_REFRESH_PERIOD static int xenfb_queue_full(struct XenFB *xenfb) { struct xenfb_page *page = xenfb->c.page; uint32_t cons, prod; if (!page) return 1; prod = page->in_prod; cons = page->in_cons; return prod - cons == XENFB_IN_RING_LEN; } static void xenfb_send_event(struct XenFB *xenfb, union xenfb_in_event *event) { uint32_t prod; struct xenfb_page *page = xenfb->c.page; prod = page->in_prod; /* caller ensures !xenfb_queue_full() */ xen_mb(); /* ensure ring space available */ XENFB_IN_RING_REF(page, prod) = *event; xen_wmb(); /* ensure ring contents visible */ page->in_prod = prod + 1; xen_be_send_notify(&xenfb->c.xendev); } static void xenfb_send_refresh_period(struct XenFB *xenfb, int period) { union xenfb_in_event event; memset(&event, 0, sizeof(event)); event.type = XENFB_TYPE_REFRESH_PERIOD; event.refresh_period.period = period; xenfb_send_event(xenfb, &event); } #endif /* * Periodic update of display. * Also transmit the refresh interval to the frontend. * * Never ever do any qemu display operations * (resize, screen update) outside this function. * Our screen might be inactive. When asked for * an update we know it is active. */ static void xenfb_update(void *opaque) { struct XenFB *xenfb = opaque; int i; if (xenfb->c.xendev.be_state != XenbusStateConnected) return; if (xenfb->feature_update) { #ifdef XENFB_TYPE_REFRESH_PERIOD struct DisplayChangeListener *l; int period = 99999999; int idle = 1; if (xenfb_queue_full(xenfb)) return; for (l = xenfb->c.ds->listeners; l != NULL; l = l->next) { if (l->idle) continue; idle = 0; if (!l->gui_timer_interval) { if (period > GUI_REFRESH_INTERVAL) period = GUI_REFRESH_INTERVAL; } else { if (period > l->gui_timer_interval) period = l->gui_timer_interval; } } if (idle) period = XENFB_NO_REFRESH; if (xenfb->refresh_period != period) { xenfb_send_refresh_period(xenfb, period); xenfb->refresh_period = period; xen_be_printf(&xenfb->c.xendev, 1, "refresh period: %d\n", period); } #else ; /* nothing */ #endif } else { /* we don't get update notifications, thus use the * sledge hammer approach ... */ xenfb->up_fullscreen = 1; } /* resize if needed */ if (xenfb->do_resize) { xenfb->do_resize = 0; switch (xenfb->depth) { case 16: case 32: /* console.c supported depth -> buffer can be used directly */ qemu_free_displaysurface(xenfb->c.ds); xenfb->c.ds->surface = qemu_create_displaysurface_from (xenfb->width, xenfb->height, xenfb->depth, xenfb->row_stride, xenfb->pixels + xenfb->offset); break; default: /* we must convert stuff */ qemu_resize_displaysurface(xenfb->c.ds, xenfb->width, xenfb->height); break; } xen_be_printf(&xenfb->c.xendev, 1, "update: resizing: %dx%d @ %d bpp%s\n", xenfb->width, xenfb->height, xenfb->depth, is_buffer_shared(xenfb->c.ds->surface) ? " (shared)" : ""); dpy_resize(xenfb->c.ds); xenfb->up_fullscreen = 1; } /* run queued updates */ if (xenfb->up_fullscreen) { xen_be_printf(&xenfb->c.xendev, 3, "update: fullscreen\n"); xenfb_guest_copy(xenfb, 0, 0, xenfb->width, xenfb->height); } else if (xenfb->up_count) { xen_be_printf(&xenfb->c.xendev, 3, "update: %d rects\n", xenfb->up_count); for (i = 0; i < xenfb->up_count; i++) xenfb_guest_copy(xenfb, xenfb->up_rects[i].x, xenfb->up_rects[i].y, xenfb->up_rects[i].w, xenfb->up_rects[i].h); } else { xen_be_printf(&xenfb->c.xendev, 3, "update: nothing\n"); } xenfb->up_count = 0; xenfb->up_fullscreen = 0; } /* QEMU display state changed, so refresh the framebuffer copy */ static void xenfb_invalidate(void *opaque) { struct XenFB *xenfb = opaque; xenfb->up_fullscreen = 1; } static void xenfb_handle_events(struct XenFB *xenfb) { uint32_t prod, cons; struct xenfb_page *page = xenfb->c.page; prod = page->out_prod; if (prod == page->out_cons) return; xen_rmb(); /* ensure we see ring contents up to prod */ for (cons = page->out_cons; cons != prod; cons++) { union xenfb_out_event *event = &XENFB_OUT_RING_REF(page, cons); int x, y, w, h; switch (event->type) { case XENFB_TYPE_UPDATE: if (xenfb->up_count == UP_QUEUE) xenfb->up_fullscreen = 1; if (xenfb->up_fullscreen) break; x = MAX(event->update.x, 0); y = MAX(event->update.y, 0); w = MIN(event->update.width, xenfb->width - x); h = MIN(event->update.height, xenfb->height - y); if (w < 0 || h < 0) { xen_be_printf(&xenfb->c.xendev, 1, "bogus update ignored\n"); break; } if (x != event->update.x || y != event->update.y || w != event->update.width || h != event->update.height) { xen_be_printf(&xenfb->c.xendev, 1, "bogus update clipped\n"); } if (w == xenfb->width && h > xenfb->height / 2) { /* scroll detector: updated more than 50% of the lines, * don't bother keeping track of the rectangles then */ xenfb->up_fullscreen = 1; } else { xenfb->up_rects[xenfb->up_count].x = x; xenfb->up_rects[xenfb->up_count].y = y; xenfb->up_rects[xenfb->up_count].w = w; xenfb->up_rects[xenfb->up_count].h = h; xenfb->up_count++; } break; #ifdef XENFB_TYPE_RESIZE case XENFB_TYPE_RESIZE: if (xenfb_configure_fb(xenfb, xenfb->fb_len, event->resize.width, event->resize.height, event->resize.depth, xenfb->fb_len, event->resize.offset, event->resize.stride) < 0) break; xenfb_invalidate(xenfb); break; #endif } } xen_mb(); /* ensure we're done with ring contents */ page->out_cons = cons; } static int fb_init(struct XenDevice *xendev) { struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev); fb->refresh_period = -1; #ifdef XENFB_TYPE_RESIZE xenstore_write_be_int(xendev, "feature-resize", 1); #endif return 0; } static int fb_connect(struct XenDevice *xendev) { struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev); struct xenfb_page *fb_page; int videoram; int rc; if (xenstore_read_fe_int(xendev, "videoram", &videoram) == -1) videoram = 0; rc = common_bind(&fb->c); if (rc != 0) return rc; fb_page = fb->c.page; rc = xenfb_configure_fb(fb, videoram * 1024 * 1024U, fb_page->width, fb_page->height, fb_page->depth, fb_page->mem_length, 0, fb_page->line_length); if (rc != 0) return rc; rc = xenfb_map_fb(fb); if (rc != 0) return rc; #if 0 /* handled in xen_init_display() for now */ if (!fb->have_console) { fb->c.ds = graphic_console_init(xenfb_update, xenfb_invalidate, NULL, NULL, fb); fb->have_console = 1; } #endif if (xenstore_read_fe_int(xendev, "feature-update", &fb->feature_update) == -1) fb->feature_update = 0; if (fb->feature_update) xenstore_write_be_int(xendev, "request-update", 1); xen_be_printf(xendev, 1, "feature-update=%d, videoram=%d\n", fb->feature_update, videoram); return 0; } static void fb_disconnect(struct XenDevice *xendev) { struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev); /* * FIXME: qemu can't un-init gfx display (yet?). * Replacing the framebuffer with anonymous shared memory * instead. This releases the guest pages and keeps qemu happy. */ fb->pixels = mmap(fb->pixels, fb->fbpages * XC_PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANON, -1, 0); common_unbind(&fb->c); fb->feature_update = 0; fb->bug_trigger = 0; } static void fb_frontend_changed(struct XenDevice *xendev, const char *node) { struct XenFB *fb = container_of(xendev, struct XenFB, c.xendev); /* * Set state to Connected *again* once the frontend switched * to connected. We must trigger the watch a second time to * workaround a frontend bug. */ if (fb->bug_trigger == 0 && strcmp(node, "state") == 0 && xendev->fe_state == XenbusStateConnected && xendev->be_state == XenbusStateConnected) { xen_be_printf(xendev, 2, "re-trigger connected (frontend bug)\n"); xen_be_set_state(xendev, XenbusStateConnected); fb->bug_trigger = 1; /* only once */ } } static void fb_event(struct XenDevice *xendev) { struct XenFB *xenfb = container_of(xendev, struct XenFB, c.xendev); xenfb_handle_events(xenfb); xen_be_send_notify(&xenfb->c.xendev); } /* -------------------------------------------------------------------- */ struct XenDevOps xen_kbdmouse_ops = { .size = sizeof(struct XenInput), .init = input_init, .connect = input_connect, .disconnect = input_disconnect, .event = input_event, }; struct XenDevOps xen_framebuffer_ops = { .size = sizeof(struct XenFB), .init = fb_init, .connect = fb_connect, .disconnect = fb_disconnect, .event = fb_event, .frontend_changed = fb_frontend_changed, }; /* * FIXME/TODO: Kill this. * Temporary needed while DisplayState reorganization is in flight. */ void xen_init_display(int domid) { struct XenDevice *xfb, *xin; struct XenFB *fb; struct XenInput *in; int i = 0; wait_more: i++; main_loop_wait(true); xfb = xen_be_find_xendev("vfb", domid, 0); xin = xen_be_find_xendev("vkbd", domid, 0); if (!xfb || !xin) { if (i < 256) { usleep(10000); goto wait_more; } xen_be_printf(NULL, 1, "displaystate setup failed\n"); return; } /* vfb */ fb = container_of(xfb, struct XenFB, c.xendev); fb->c.ds = graphic_console_init(xenfb_update, xenfb_invalidate, NULL, NULL, fb); fb->have_console = 1; /* vkbd */ in = container_of(xin, struct XenInput, c.xendev); in->c.ds = fb->c.ds; /* retry ->init() */ xen_be_check_state(xin); xen_be_check_state(xfb); }