| /* |
| * 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 = qemu_xen_foreignmem_map(c->xendev.dom, NULL, |
| 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) { |
| qemu_xen_foreignmem_unmap(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 const QemuInputHandler xenfb_keyboard = { |
| .name = "Xen PV Keyboard", |
| .mask = INPUT_EVENT_MASK_KEY, |
| .event = xenfb_key_event, |
| }; |
| |
| static const 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 const 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 * XEN_PAGE_SIZE); |
| xenfb->pixels = NULL; |
| } |
| |
| xenfb->fbpages = DIV_ROUND_UP(xenfb->fb_len, XEN_PAGE_SIZE); |
| n_fbdirs = xenfb->fbpages * mode / 8; |
| n_fbdirs = DIV_ROUND_UP(n_fbdirs, XEN_PAGE_SIZE); |
| |
| pgmfns = g_new0(xen_pfn_t, n_fbdirs); |
| fbmfns = g_new0(xen_pfn_t, xenfb->fbpages); |
| |
| xenfb_copy_mfns(mode, n_fbdirs, pgmfns, pd); |
| map = qemu_xen_foreignmem_map(xenfb->c.xendev.dom, NULL, PROT_READ, |
| n_fbdirs, pgmfns, NULL); |
| if (map == NULL) |
| goto out; |
| xenfb_copy_mfns(mode, xenfb->fbpages, fbmfns, map); |
| qemu_xen_foreignmem_unmap(map, n_fbdirs); |
| |
| xenfb->pixels = qemu_xen_foreignmem_map(xenfb->c.xendev.dom, NULL, |
| 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 * XEN_PAGE_SIZE / mfn_sz; |
| size_t fb_len_max = fb_pages * XEN_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_ui_info(void *opaque, uint32_t idx, QemuUIInfo *info) |
| { |
| struct XenFB *xenfb = opaque; |
| uint32_t refresh_rate; |
| |
| if (xenfb->feature_update) { |
| #ifdef XENFB_TYPE_REFRESH_PERIOD |
| if (xenfb_queue_full(xenfb)) { |
| return; |
| } |
| |
| refresh_rate = info->refresh_rate; |
| if (!refresh_rate) { |
| refresh_rate = 75; |
| } |
| |
| /* T = 1 / f = 1 [s*Hz] / f = 1000*1000 [ms*mHz] / f */ |
| xenfb_send_refresh_period(xenfb, 1000 * 1000 / refresh_rate); |
| #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. |
| */ |
| qemu_xen_foreignmem_unmap(fb->pixels, fb->fbpages); |
| fb->pixels = mmap(fb->pixels, fb->fbpages * XEN_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); |
| } |
| |
| /* -------------------------------------------------------------------- */ |
| |
| static 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, |
| .ui_info = xenfb_ui_info, |
| }; |
| |
| static void xen_vkbd_register_backend(void) |
| { |
| xen_be_register("vkbd", &xen_kbdmouse_ops); |
| } |
| xen_backend_init(xen_vkbd_register_backend); |
