/* * 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 "qemu/osdep.h" #include "qemu/units.h" #include "ui/input.h" #include "ui/console.h" #include "hw/xen/xen-legacy-backend.h" #include "hw/xen/interface/io/fbif.h" #include "hw/xen/interface/io/kbdif.h" #include "hw/xen/interface/io/protocols.h" #include "trace.h" #ifndef BTN_LEFT #define BTN_LEFT 0x110 /* from <linux/input.h> */ #endif /* -------------------------------------------------------------------- */ struct common { struct XenLegacyDevice xendev; /* must be first */ void *page; }; struct XenInput { struct common c; int abs_pointer_wanted; /* Whether guest supports absolute pointer */ int raw_pointer_wanted; /* Whether guest supports raw (unscaled) pointer */ QemuInputHandlerState *qkbd; QemuInputHandlerState *qmou; int axis[INPUT_AXIS__MAX]; int wheel; }; #define UP_QUEUE 8 struct XenFB { struct common c; QemuConsole *con; size_t fb_len; int row_stride; int depth; int width; int height; int offset; void *pixels; int fbpages; int feature_update; int bug_trigger; int do_resize; struct { int x,y,w,h; } up_rects[UP_QUEUE]; int up_count; int up_fullscreen; }; static const GraphicHwOps xenfb_ops; /* -------------------------------------------------------------------- */ static int common_bind(struct common *c) { uint64_t val; xen_pfn_t mfn; if (xenstore_read_fe_uint64(&c->xendev, "page-ref", &val) == -1) return -1; mfn = (xen_pfn_t)val; assert(val == mfn); if (xenstore_read_fe_int(&c->xendev, "event-channel", &c->xendev.remote_port) == -1) return -1; c->page = xenforeignmemory_map(xen_fmem, c->xendev.dom, PROT_READ | PROT_WRITE, 1, &mfn, NULL); if (c->page == NULL) return -1; xen_be_bind_evtchn(&c->xendev); xen_pv_printf(&c->xendev, 1, "ring mfn %"PRI_xen_pfn", 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_pv_unbind_evtchn(&c->xendev); if (c->page) { xenforeignmemory_unmap(xen_fmem, c->page, 1); c->page = NULL; } } /* -------------------------------------------------------------------- */ /* 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_pv_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; event.motion.rel_z = rel_z; 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; event.pos.rel_z = z; return xenfb_kbd_event(xenfb, &event); } /* * Send a key event from the client to the guest OS * QEMU gives us a QCode. * We have to turn this into a Linux Input layer keycode. * * Wish we could just send scancodes straight to the guest which * already has code for dealing with this... */ static void xenfb_key_event(DeviceState *dev, QemuConsole *src, InputEvent *evt) { struct XenInput *xenfb = (struct XenInput *)dev; InputKeyEvent *key = evt->u.key.data; int qcode = qemu_input_key_value_to_qcode(key->key); int lnx; if (qcode < qemu_input_map_qcode_to_linux_len) { lnx = qemu_input_map_qcode_to_linux[qcode]; if (lnx) { trace_xenfb_key_event(xenfb, lnx, key->down); xenfb_send_key(xenfb, key->down, lnx); } } } /* * 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(DeviceState *dev, QemuConsole *src, InputEvent *evt) { struct XenInput *xenfb = (struct XenInput *)dev; InputBtnEvent *btn; InputMoveEvent *move; QemuConsole *con; DisplaySurface *surface; int scale; switch (evt->type) { case INPUT_EVENT_KIND_BTN: btn = evt->u.btn.data; switch (btn->button) { case INPUT_BUTTON_LEFT: xenfb_send_key(xenfb, btn->down, BTN_LEFT); break; case INPUT_BUTTON_RIGHT: xenfb_send_key(xenfb, btn->down, BTN_LEFT + 1); break; case INPUT_BUTTON_MIDDLE: xenfb_send_key(xenfb, btn->down, BTN_LEFT + 2); break; case INPUT_BUTTON_WHEEL_UP: if (btn->down) { xenfb->wheel--; } break; case INPUT_BUTTON_WHEEL_DOWN: if (btn->down) { xenfb->wheel++; } break; default: break; } break; case INPUT_EVENT_KIND_ABS: move = evt->u.abs.data; if (xenfb->raw_pointer_wanted) { xenfb->axis[move->axis] = move->value; } else { con = qemu_console_lookup_by_index(0); if (!con) { xen_pv_printf(&xenfb->c.xendev, 0, "No QEMU console available"); return; } surface = qemu_console_surface(con); switch (move->axis) { case INPUT_AXIS_X: scale = surface_width(surface) - 1; break; case INPUT_AXIS_Y: scale = surface_height(surface) - 1; break; default: scale = 0x8000; break; } xenfb->axis[move->axis] = move->value * scale / 0x7fff; } break; case INPUT_EVENT_KIND_REL: move = evt->u.rel.data; xenfb->axis[move->axis] += move->value; break; default: break; } } static void xenfb_mouse_sync(DeviceState *dev) { struct XenInput *xenfb = (struct XenInput *)dev; trace_xenfb_mouse_event(xenfb, xenfb->axis[INPUT_AXIS_X], xenfb->axis[INPUT_AXIS_Y], xenfb->wheel, 0, xenfb->abs_pointer_wanted); if (xenfb->abs_pointer_wanted) { xenfb_send_position(xenfb, xenfb->axis[INPUT_AXIS_X], xenfb->axis[INPUT_AXIS_Y], xenfb->wheel); } else { xenfb_send_motion(xenfb, xenfb->axis[INPUT_AXIS_X], xenfb->axis[INPUT_AXIS_Y], xenfb->wheel); xenfb->axis[INPUT_AXIS_X] = 0; xenfb->axis[INPUT_AXIS_Y] = 0; } xenfb->wheel = 0; } static QemuInputHandler xenfb_keyboard = { .name = "Xen PV Keyboard", .mask = INPUT_EVENT_MASK_KEY, .event = xenfb_key_event, }; static QemuInputHandler xenfb_abs_mouse = { .name = "Xen PV Mouse", .mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_ABS, .event = xenfb_mouse_event, .sync = xenfb_mouse_sync, }; static QemuInputHandler xenfb_rel_mouse = { .name = "Xen PV Mouse", .mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL, .event = xenfb_mouse_event, .sync = xenfb_mouse_sync, }; static int input_init(struct XenLegacyDevice *xendev) { xenstore_write_be_int(xendev, "feature-abs-pointer", 1); xenstore_write_be_int(xendev, "feature-raw-pointer", 1); return 0; } static int input_initialise(struct XenLegacyDevice *xendev) { struct XenInput *in = container_of(xendev, struct XenInput, c.xendev); int rc; rc = common_bind(&in->c); if (rc != 0) return rc; return 0; } static void input_connected(struct XenLegacyDevice *xendev) { struct XenInput *in = container_of(xendev, struct XenInput, c.xendev); if (xenstore_read_fe_int(xendev, "request-abs-pointer", &in->abs_pointer_wanted) == -1) { in->abs_pointer_wanted = 0; } if (xenstore_read_fe_int(xendev, "request-raw-pointer", &in->raw_pointer_wanted) == -1) { in->raw_pointer_wanted = 0; } if (in->raw_pointer_wanted && in->abs_pointer_wanted == 0) { xen_pv_printf(xendev, 0, "raw pointer set without abs pointer"); } if (in->qkbd) { qemu_input_handler_unregister(in->qkbd); } if (in->qmou) { qemu_input_handler_unregister(in->qmou); } trace_xenfb_input_connected(xendev, in->abs_pointer_wanted); in->qkbd = qemu_input_handler_register((DeviceState *)in, &xenfb_keyboard); in->qmou = qemu_input_handler_register((DeviceState *)in, in->abs_pointer_wanted ? &xenfb_abs_mouse : &xenfb_rel_mouse); if (in->raw_pointer_wanted) { qemu_input_handler_activate(in->qkbd); qemu_input_handler_activate(in->qmou); } } static void input_disconnect(struct XenLegacyDevice *xendev) { struct XenInput *in = container_of(xendev, struct XenInput, c.xendev); if (in->qkbd) { qemu_input_handler_unregister(in->qkbd); in->qkbd = NULL; } if (in->qmou) { qemu_input_handler_unregister(in->qmou); in->qmou = NULL; } common_unbind(&in->c); } static void input_event(struct XenLegacyDevice *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_pv_send_notify(&xenfb->c.xendev); } /* -------------------------------------------------------------------- */ static void xenfb_copy_mfns(int mode, int count, xen_pfn_t *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; xen_pfn_t *pgmfns = NULL; xen_pfn_t *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 = DIV_ROUND_UP(xenfb->fb_len, XC_PAGE_SIZE); n_fbdirs = xenfb->fbpages * mode / 8; n_fbdirs = DIV_ROUND_UP(n_fbdirs, XC_PAGE_SIZE); pgmfns = g_malloc0(sizeof(xen_pfn_t) * n_fbdirs); fbmfns = g_malloc0(sizeof(xen_pfn_t) * xenfb->fbpages); xenfb_copy_mfns(mode, n_fbdirs, pgmfns, pd); map = xenforeignmemory_map(xen_fmem, xenfb->c.xendev.dom, PROT_READ, n_fbdirs, pgmfns, NULL); if (map == NULL) goto out; xenfb_copy_mfns(mode, xenfb->fbpages, fbmfns, map); xenforeignmemory_unmap(xen_fmem, map, n_fbdirs); xenfb->pixels = xenforeignmemory_map(xen_fmem, xenfb->c.xendev.dom, PROT_READ, xenfb->fbpages, fbmfns, NULL); if (xenfb->pixels == NULL) goto out; ret = 0; /* all is fine */ out: g_free(pgmfns); g_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_field(struct xenfb_page, pd[0]); size_t pd_len = sizeof_field(struct xenfb_page, 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_pv_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_pv_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_pv_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_pv_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_pv_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_pv_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_pv_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_pv_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) { DisplaySurface *surface = qemu_console_surface(xenfb->con); int line, oops = 0; int bpp = surface_bits_per_pixel(surface); int linesize = surface_stride(surface); uint8_t *data = surface_data(surface); if (!is_buffer_shared(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_pv_printf(&xenfb->c.xendev, 0, "%s: oops: convert %d -> %d bpp?\n", __func__, xenfb->depth, bpp); dpy_gfx_update(xenfb->con, 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_pv_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; DisplaySurface *surface; int i; if (xenfb->c.xendev.be_state != XenbusStateConnected) return; if (!xenfb->feature_update) { /* we don't get update notifications, thus use the * sledge hammer approach ... */ xenfb->up_fullscreen = 1; } /* resize if needed */ if (xenfb->do_resize) { pixman_format_code_t format; xenfb->do_resize = 0; switch (xenfb->depth) { case 16: case 32: /* console.c supported depth -> buffer can be used directly */ format = qemu_default_pixman_format(xenfb->depth, true); surface = qemu_create_displaysurface_from (xenfb->width, xenfb->height, format, xenfb->row_stride, xenfb->pixels + xenfb->offset); break; default: /* we must convert stuff */ surface = qemu_create_displaysurface(xenfb->width, xenfb->height); break; } dpy_gfx_replace_surface(xenfb->con, surface); xen_pv_printf(&xenfb->c.xendev, 1, "update: resizing: %dx%d @ %d bpp%s\n", xenfb->width, xenfb->height, xenfb->depth, is_buffer_shared(surface) ? " (shared)" : ""); xenfb->up_fullscreen = 1; } /* run queued updates */ if (xenfb->up_fullscreen) { xen_pv_printf(&xenfb->c.xendev, 3, "update: fullscreen\n"); xenfb_guest_copy(xenfb, 0, 0, xenfb->width, xenfb->height); } else if (xenfb->up_count) { xen_pv_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_pv_printf(&xenfb->c.xendev, 3, "update: nothing\n"); } xenfb->up_count = 0; xenfb->up_fullscreen = 0; } static void xenfb_update_interval(void *opaque, uint64_t interval) { struct XenFB *xenfb = opaque; if (xenfb->feature_update) { #ifdef XENFB_TYPE_REFRESH_PERIOD if (xenfb_queue_full(xenfb)) { return; } xenfb_send_refresh_period(xenfb, interval); #endif } } /* 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, out_cons; struct xenfb_page *page = xenfb->c.page; prod = page->out_prod; out_cons = page->out_cons; if (prod - out_cons > XENFB_OUT_RING_LEN) { return; } xen_rmb(); /* ensure we see ring contents up to prod */ for (cons = out_cons; cons != prod; cons++) { union xenfb_out_event *event = &XENFB_OUT_RING_REF(page, cons); uint8_t type = event->type; int x, y, w, h; switch (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_pv_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_pv_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 XenLegacyDevice *xendev) { #ifdef XENFB_TYPE_RESIZE xenstore_write_be_int(xendev, "feature-resize", 1); #endif return 0; } static int fb_initialise(struct XenLegacyDevice *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 * MiB, 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; fb->con = graphic_console_init(NULL, 0, &xenfb_ops, fb); 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_pv_printf(xendev, 1, "feature-update=%d, videoram=%d\n", fb->feature_update, videoram); return 0; } static void fb_disconnect(struct XenLegacyDevice *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. */ xenforeignmemory_unmap(xen_fmem, fb->pixels, fb->fbpages); fb->pixels = mmap(fb->pixels, fb->fbpages * XC_PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANON, -1, 0); if (fb->pixels == MAP_FAILED) { xen_pv_printf(xendev, 0, "Couldn't replace the framebuffer with anonymous memory errno=%d\n", errno); } common_unbind(&fb->c); fb->feature_update = 0; fb->bug_trigger = 0; } static void fb_frontend_changed(struct XenLegacyDevice *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_pv_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 XenLegacyDevice *xendev) { struct XenFB *xenfb = container_of(xendev, struct XenFB, c.xendev); xenfb_handle_events(xenfb); xen_pv_send_notify(&xenfb->c.xendev); } /* -------------------------------------------------------------------- */ struct XenDevOps xen_kbdmouse_ops = { .size = sizeof(struct XenInput), .init = input_init, .initialise = input_initialise, .connected = input_connected, .disconnect = input_disconnect, .event = input_event, }; struct XenDevOps xen_framebuffer_ops = { .size = sizeof(struct XenFB), .init = fb_init, .initialise = fb_initialise, .disconnect = fb_disconnect, .event = fb_event, .frontend_changed = fb_frontend_changed, }; static const GraphicHwOps xenfb_ops = { .invalidate = xenfb_invalidate, .gfx_update = xenfb_update, .update_interval = xenfb_update_interval, };