987 lines
29 KiB
C
987 lines
29 KiB
C
/*
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* xen paravirt framebuffer backend
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*
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* Copyright IBM, Corp. 2005-2006
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* Copyright Red Hat, Inc. 2006-2008
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>,
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* Markus Armbruster <armbru@redhat.com>,
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* Daniel P. Berrange <berrange@redhat.com>,
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* Pat Campbell <plc@novell.com>,
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* Gerd Hoffmann <kraxel@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; under version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qemu/units.h"
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#include "ui/input.h"
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#include "ui/console.h"
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#include "hw/xen/xen-legacy-backend.h"
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#include "hw/xen/interface/io/fbif.h"
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#include "hw/xen/interface/io/kbdif.h"
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#include "hw/xen/interface/io/protocols.h"
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#include "trace.h"
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#ifndef BTN_LEFT
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#define BTN_LEFT 0x110 /* from <linux/input.h> */
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#endif
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/* -------------------------------------------------------------------- */
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struct common {
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struct XenLegacyDevice xendev; /* must be first */
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void *page;
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};
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struct XenInput {
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struct common c;
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int abs_pointer_wanted; /* Whether guest supports absolute pointer */
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int raw_pointer_wanted; /* Whether guest supports raw (unscaled) pointer */
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QemuInputHandlerState *qkbd;
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QemuInputHandlerState *qmou;
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int axis[INPUT_AXIS__MAX];
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int wheel;
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};
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#define UP_QUEUE 8
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struct XenFB {
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struct common c;
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QemuConsole *con;
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size_t fb_len;
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int row_stride;
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int depth;
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int width;
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int height;
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int offset;
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void *pixels;
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int fbpages;
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int feature_update;
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int bug_trigger;
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int do_resize;
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struct {
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int x,y,w,h;
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} up_rects[UP_QUEUE];
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int up_count;
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int up_fullscreen;
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};
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static const GraphicHwOps xenfb_ops;
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/* -------------------------------------------------------------------- */
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static int common_bind(struct common *c)
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{
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uint64_t val;
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xen_pfn_t mfn;
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if (xenstore_read_fe_uint64(&c->xendev, "page-ref", &val) == -1)
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return -1;
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mfn = (xen_pfn_t)val;
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assert(val == mfn);
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if (xenstore_read_fe_int(&c->xendev, "event-channel", &c->xendev.remote_port) == -1)
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return -1;
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c->page = xenforeignmemory_map(xen_fmem, c->xendev.dom,
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PROT_READ | PROT_WRITE, 1, &mfn, NULL);
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if (c->page == NULL)
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return -1;
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xen_be_bind_evtchn(&c->xendev);
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xen_pv_printf(&c->xendev, 1,
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"ring mfn %"PRI_xen_pfn", remote-port %d, local-port %d\n",
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mfn, c->xendev.remote_port, c->xendev.local_port);
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return 0;
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}
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static void common_unbind(struct common *c)
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{
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xen_pv_unbind_evtchn(&c->xendev);
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if (c->page) {
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xenforeignmemory_unmap(xen_fmem, c->page, 1);
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c->page = NULL;
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}
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}
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/* -------------------------------------------------------------------- */
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/* Send an event to the keyboard frontend driver */
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static int xenfb_kbd_event(struct XenInput *xenfb,
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union xenkbd_in_event *event)
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{
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struct xenkbd_page *page = xenfb->c.page;
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uint32_t prod;
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if (xenfb->c.xendev.be_state != XenbusStateConnected)
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return 0;
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if (!page)
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return 0;
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prod = page->in_prod;
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if (prod - page->in_cons == XENKBD_IN_RING_LEN) {
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errno = EAGAIN;
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return -1;
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}
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xen_mb(); /* ensure ring space available */
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XENKBD_IN_RING_REF(page, prod) = *event;
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xen_wmb(); /* ensure ring contents visible */
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page->in_prod = prod + 1;
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return xen_pv_send_notify(&xenfb->c.xendev);
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}
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/* Send a keyboard (or mouse button) event */
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static int xenfb_send_key(struct XenInput *xenfb, bool down, int keycode)
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{
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union xenkbd_in_event event;
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memset(&event, 0, XENKBD_IN_EVENT_SIZE);
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event.type = XENKBD_TYPE_KEY;
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event.key.pressed = down ? 1 : 0;
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event.key.keycode = keycode;
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return xenfb_kbd_event(xenfb, &event);
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}
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/* Send a relative mouse movement event */
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static int xenfb_send_motion(struct XenInput *xenfb,
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int rel_x, int rel_y, int rel_z)
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{
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union xenkbd_in_event event;
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memset(&event, 0, XENKBD_IN_EVENT_SIZE);
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event.type = XENKBD_TYPE_MOTION;
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event.motion.rel_x = rel_x;
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event.motion.rel_y = rel_y;
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event.motion.rel_z = rel_z;
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return xenfb_kbd_event(xenfb, &event);
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}
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/* Send an absolute mouse movement event */
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static int xenfb_send_position(struct XenInput *xenfb,
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int abs_x, int abs_y, int z)
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{
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union xenkbd_in_event event;
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memset(&event, 0, XENKBD_IN_EVENT_SIZE);
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event.type = XENKBD_TYPE_POS;
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event.pos.abs_x = abs_x;
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event.pos.abs_y = abs_y;
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event.pos.rel_z = z;
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return xenfb_kbd_event(xenfb, &event);
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}
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/*
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* Send a key event from the client to the guest OS
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* QEMU gives us a QCode.
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* We have to turn this into a Linux Input layer keycode.
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*
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* Wish we could just send scancodes straight to the guest which
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* already has code for dealing with this...
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*/
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static void xenfb_key_event(DeviceState *dev, QemuConsole *src,
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InputEvent *evt)
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{
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struct XenInput *xenfb = (struct XenInput *)dev;
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InputKeyEvent *key = evt->u.key.data;
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int qcode = qemu_input_key_value_to_qcode(key->key);
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int lnx;
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if (qcode < qemu_input_map_qcode_to_linux_len) {
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lnx = qemu_input_map_qcode_to_linux[qcode];
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if (lnx) {
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trace_xenfb_key_event(xenfb, lnx, key->down);
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xenfb_send_key(xenfb, key->down, lnx);
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}
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}
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}
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/*
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* Send a mouse event from the client to the guest OS
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*
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* The QEMU mouse can be in either relative, or absolute mode.
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* Movement is sent separately from button state, which has to
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* be encoded as virtual key events. We also don't actually get
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* given any button up/down events, so have to track changes in
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* the button state.
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*/
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static void xenfb_mouse_event(DeviceState *dev, QemuConsole *src,
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InputEvent *evt)
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{
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struct XenInput *xenfb = (struct XenInput *)dev;
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InputBtnEvent *btn;
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InputMoveEvent *move;
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QemuConsole *con;
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DisplaySurface *surface;
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int scale;
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switch (evt->type) {
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case INPUT_EVENT_KIND_BTN:
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btn = evt->u.btn.data;
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switch (btn->button) {
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case INPUT_BUTTON_LEFT:
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xenfb_send_key(xenfb, btn->down, BTN_LEFT);
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break;
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case INPUT_BUTTON_RIGHT:
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xenfb_send_key(xenfb, btn->down, BTN_LEFT + 1);
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break;
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case INPUT_BUTTON_MIDDLE:
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xenfb_send_key(xenfb, btn->down, BTN_LEFT + 2);
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break;
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case INPUT_BUTTON_WHEEL_UP:
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if (btn->down) {
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xenfb->wheel--;
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}
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break;
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case INPUT_BUTTON_WHEEL_DOWN:
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if (btn->down) {
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xenfb->wheel++;
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}
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break;
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default:
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break;
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}
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break;
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case INPUT_EVENT_KIND_ABS:
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move = evt->u.abs.data;
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if (xenfb->raw_pointer_wanted) {
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xenfb->axis[move->axis] = move->value;
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} else {
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con = qemu_console_lookup_by_index(0);
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if (!con) {
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xen_pv_printf(&xenfb->c.xendev, 0, "No QEMU console available");
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return;
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}
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surface = qemu_console_surface(con);
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switch (move->axis) {
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case INPUT_AXIS_X:
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scale = surface_width(surface) - 1;
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break;
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case INPUT_AXIS_Y:
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scale = surface_height(surface) - 1;
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break;
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default:
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scale = 0x8000;
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break;
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}
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xenfb->axis[move->axis] = move->value * scale / 0x7fff;
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}
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break;
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case INPUT_EVENT_KIND_REL:
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move = evt->u.rel.data;
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xenfb->axis[move->axis] += move->value;
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break;
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default:
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break;
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}
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}
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static void xenfb_mouse_sync(DeviceState *dev)
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{
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struct XenInput *xenfb = (struct XenInput *)dev;
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trace_xenfb_mouse_event(xenfb, xenfb->axis[INPUT_AXIS_X],
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xenfb->axis[INPUT_AXIS_Y],
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xenfb->wheel, 0,
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xenfb->abs_pointer_wanted);
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if (xenfb->abs_pointer_wanted) {
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xenfb_send_position(xenfb, xenfb->axis[INPUT_AXIS_X],
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xenfb->axis[INPUT_AXIS_Y],
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xenfb->wheel);
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} else {
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xenfb_send_motion(xenfb, xenfb->axis[INPUT_AXIS_X],
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xenfb->axis[INPUT_AXIS_Y],
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xenfb->wheel);
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xenfb->axis[INPUT_AXIS_X] = 0;
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xenfb->axis[INPUT_AXIS_Y] = 0;
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}
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xenfb->wheel = 0;
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}
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static QemuInputHandler xenfb_keyboard = {
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.name = "Xen PV Keyboard",
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.mask = INPUT_EVENT_MASK_KEY,
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.event = xenfb_key_event,
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};
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static QemuInputHandler xenfb_abs_mouse = {
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.name = "Xen PV Mouse",
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.mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_ABS,
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.event = xenfb_mouse_event,
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.sync = xenfb_mouse_sync,
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};
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static QemuInputHandler xenfb_rel_mouse = {
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.name = "Xen PV Mouse",
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.mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL,
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.event = xenfb_mouse_event,
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.sync = xenfb_mouse_sync,
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};
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static int input_init(struct XenLegacyDevice *xendev)
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{
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xenstore_write_be_int(xendev, "feature-abs-pointer", 1);
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xenstore_write_be_int(xendev, "feature-raw-pointer", 1);
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return 0;
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}
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static int input_initialise(struct XenLegacyDevice *xendev)
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{
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struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
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int rc;
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rc = common_bind(&in->c);
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if (rc != 0)
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return rc;
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return 0;
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}
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static void input_connected(struct XenLegacyDevice *xendev)
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{
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struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
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if (xenstore_read_fe_int(xendev, "request-abs-pointer",
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&in->abs_pointer_wanted) == -1) {
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in->abs_pointer_wanted = 0;
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}
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if (xenstore_read_fe_int(xendev, "request-raw-pointer",
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&in->raw_pointer_wanted) == -1) {
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in->raw_pointer_wanted = 0;
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}
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if (in->raw_pointer_wanted && in->abs_pointer_wanted == 0) {
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xen_pv_printf(xendev, 0, "raw pointer set without abs pointer");
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}
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if (in->qkbd) {
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qemu_input_handler_unregister(in->qkbd);
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}
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if (in->qmou) {
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qemu_input_handler_unregister(in->qmou);
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}
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trace_xenfb_input_connected(xendev, in->abs_pointer_wanted);
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in->qkbd = qemu_input_handler_register((DeviceState *)in, &xenfb_keyboard);
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in->qmou = qemu_input_handler_register((DeviceState *)in,
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in->abs_pointer_wanted ? &xenfb_abs_mouse : &xenfb_rel_mouse);
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if (in->raw_pointer_wanted) {
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qemu_input_handler_activate(in->qkbd);
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qemu_input_handler_activate(in->qmou);
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}
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}
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static void input_disconnect(struct XenLegacyDevice *xendev)
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{
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struct XenInput *in = container_of(xendev, struct XenInput, c.xendev);
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if (in->qkbd) {
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qemu_input_handler_unregister(in->qkbd);
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in->qkbd = NULL;
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}
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if (in->qmou) {
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qemu_input_handler_unregister(in->qmou);
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in->qmou = NULL;
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}
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common_unbind(&in->c);
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}
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static void input_event(struct XenLegacyDevice *xendev)
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{
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struct XenInput *xenfb = container_of(xendev, struct XenInput, c.xendev);
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struct xenkbd_page *page = xenfb->c.page;
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/* We don't understand any keyboard events, so just ignore them. */
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if (page->out_prod == page->out_cons)
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return;
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page->out_cons = page->out_prod;
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xen_pv_send_notify(&xenfb->c.xendev);
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}
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/* -------------------------------------------------------------------- */
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static void xenfb_copy_mfns(int mode, int count, xen_pfn_t *dst, void *src)
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{
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uint32_t *src32 = src;
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uint64_t *src64 = src;
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int i;
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for (i = 0; i < count; i++)
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dst[i] = (mode == 32) ? src32[i] : src64[i];
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}
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static int xenfb_map_fb(struct XenFB *xenfb)
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{
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struct xenfb_page *page = xenfb->c.page;
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char *protocol = xenfb->c.xendev.protocol;
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int n_fbdirs;
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xen_pfn_t *pgmfns = NULL;
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xen_pfn_t *fbmfns = NULL;
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void *map, *pd;
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int mode, ret = -1;
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/* default to native */
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pd = page->pd;
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mode = sizeof(unsigned long) * 8;
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if (!protocol) {
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/*
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* Undefined protocol, some guesswork needed.
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*
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* Old frontends which don't set the protocol use
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* one page directory only, thus pd[1] must be zero.
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* pd[1] of the 32bit struct layout and the lower
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* 32 bits of pd[0] of the 64bit struct layout have
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* the same location, so we can check that ...
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*/
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uint32_t *ptr32 = NULL;
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uint32_t *ptr64 = NULL;
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#if defined(__i386__)
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ptr32 = (void*)page->pd;
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ptr64 = ((void*)page->pd) + 4;
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#elif defined(__x86_64__)
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ptr32 = ((void*)page->pd) - 4;
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ptr64 = (void*)page->pd;
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#endif
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if (ptr32) {
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if (ptr32[1] == 0) {
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mode = 32;
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pd = ptr32;
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} else {
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mode = 64;
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pd = ptr64;
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}
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}
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#if defined(__x86_64__)
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} else if (strcmp(protocol, XEN_IO_PROTO_ABI_X86_32) == 0) {
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/* 64bit dom0, 32bit domU */
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mode = 32;
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pd = ((void*)page->pd) - 4;
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#elif defined(__i386__)
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} else if (strcmp(protocol, XEN_IO_PROTO_ABI_X86_64) == 0) {
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/* 32bit dom0, 64bit domU */
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mode = 64;
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pd = ((void*)page->pd) + 4;
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#endif
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}
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if (xenfb->pixels) {
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munmap(xenfb->pixels, xenfb->fbpages * XC_PAGE_SIZE);
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xenfb->pixels = NULL;
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}
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xenfb->fbpages = DIV_ROUND_UP(xenfb->fb_len, XC_PAGE_SIZE);
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n_fbdirs = xenfb->fbpages * mode / 8;
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n_fbdirs = DIV_ROUND_UP(n_fbdirs, XC_PAGE_SIZE);
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pgmfns = g_malloc0(sizeof(xen_pfn_t) * n_fbdirs);
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fbmfns = g_malloc0(sizeof(xen_pfn_t) * xenfb->fbpages);
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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,
|
|
};
|