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qemu/ui/input-linux.c
Markus Armbruster d5938f29fe Clean up inclusion of sysemu/sysemu.h 
In my "build everything" tree, changing sysemu/sysemu.h triggers a
recompile of some 5400 out of 6600 objects (not counting tests and
objects that don't depend on qemu/osdep.h).

Almost a third of its inclusions are actually superfluous.  Delete
them.  Downgrade two more to qapi/qapi-types-run-state.h, and move one
from char/serial.h to char/serial.c.

hw/semihosting/config.c, monitor/monitor.c, qdev-monitor.c, and
stubs/semihost.c define variables declared in sysemu/sysemu.h without
including it.  The compiler is cool with that, but include it anyway.

This doesn't reduce actual use much, as it's still included into
widely included headers.  The next commit will tackle that.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20190812052359.30071-27-armbru@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
2019-08-16 13:31:53 +02:00

513 lines
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/*
* This work is licensed under the terms of the GNU GPL, version 2 or
* (at your option) any later version. See the COPYING file in the
* top-level directory.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu/config-file.h"
#include "qemu/main-loop.h"
#include "qemu/module.h"
#include "qemu/sockets.h"
#include "ui/input.h"
#include "qom/object_interfaces.h"
#include "sysemu/iothread.h"
#include "block/aio.h"
#include <sys/ioctl.h>
#include "standard-headers/linux/input.h"
static bool linux_is_button(unsigned int lnx)
{
if (lnx < 0x100) {
return false;
}
if (lnx >= 0x160 && lnx < 0x2c0) {
return false;
}
return true;
}
#define TYPE_INPUT_LINUX "input-linux"
#define INPUT_LINUX(obj) \
OBJECT_CHECK(InputLinux, (obj), TYPE_INPUT_LINUX)
#define INPUT_LINUX_GET_CLASS(obj) \
OBJECT_GET_CLASS(InputLinuxClass, (obj), TYPE_INPUT_LINUX)
#define INPUT_LINUX_CLASS(klass) \
OBJECT_CLASS_CHECK(InputLinuxClass, (klass), TYPE_INPUT_LINUX)
typedef struct InputLinux InputLinux;
typedef struct InputLinuxClass InputLinuxClass;
struct InputLinux {
Object parent;
char *evdev;
int fd;
bool repeat;
bool grab_request;
bool grab_active;
bool grab_all;
bool keydown[KEY_CNT];
int keycount;
int wheel;
bool initialized;
bool has_rel_x;
bool has_abs_x;
int num_keys;
int num_btns;
int abs_x_min;
int abs_x_max;
int abs_y_min;
int abs_y_max;
struct input_event event;
int read_offset;
enum GrabToggleKeys grab_toggle;
QTAILQ_ENTRY(InputLinux) next;
};
struct InputLinuxClass {
ObjectClass parent_class;
};
static QTAILQ_HEAD(, InputLinux) inputs = QTAILQ_HEAD_INITIALIZER(inputs);
static void input_linux_toggle_grab(InputLinux *il)
{
intptr_t request = !il->grab_active;
InputLinux *item;
int rc;
rc = ioctl(il->fd, EVIOCGRAB, request);
if (rc < 0) {
return;
}
il->grab_active = !il->grab_active;
if (!il->grab_all) {
return;
}
QTAILQ_FOREACH(item, &inputs, next) {
if (item == il || item->grab_all) {
/* avoid endless loops */
continue;
}
if (item->grab_active != il->grab_active) {
input_linux_toggle_grab(item);
}
}
}
static bool input_linux_check_toggle(InputLinux *il)
{
switch (il->grab_toggle) {
case GRAB_TOGGLE_KEYS_CTRL_CTRL:
return il->keydown[KEY_LEFTCTRL] &&
il->keydown[KEY_RIGHTCTRL];
case GRAB_TOGGLE_KEYS_ALT_ALT:
return il->keydown[KEY_LEFTALT] &&
il->keydown[KEY_RIGHTALT];
case GRAB_TOGGLE_KEYS_META_META:
return il->keydown[KEY_LEFTMETA] &&
il->keydown[KEY_RIGHTMETA];
case GRAB_TOGGLE_KEYS_SCROLLLOCK:
return il->keydown[KEY_SCROLLLOCK];
case GRAB_TOGGLE_KEYS_CTRL_SCROLLLOCK:
return (il->keydown[KEY_LEFTCTRL] ||
il->keydown[KEY_RIGHTCTRL]) &&
il->keydown[KEY_SCROLLLOCK];
case GRAB_TOGGLE_KEYS__MAX:
/* avoid gcc error */
break;
}
return false;
}
static bool input_linux_should_skip(InputLinux *il,
struct input_event *event)
{
return (il->grab_toggle == GRAB_TOGGLE_KEYS_SCROLLLOCK ||
il->grab_toggle == GRAB_TOGGLE_KEYS_CTRL_SCROLLLOCK) &&
event->code == KEY_SCROLLLOCK;
}
static void input_linux_handle_keyboard(InputLinux *il,
struct input_event *event)
{
if (event->type == EV_KEY) {
if (event->value > 2 || (event->value > 1 && !il->repeat)) {
/*
* ignore autorepeat + unknown key events
* 0 == up, 1 == down, 2 == autorepeat, other == undefined
*/
return;
}
if (event->code >= KEY_CNT) {
/*
* Should not happen. But better safe than sorry,
* and we make Coverity happy too.
*/
return;
}
/* keep track of key state */
if (!il->keydown[event->code] && event->value) {
il->keydown[event->code] = true;
il->keycount++;
}
if (il->keydown[event->code] && !event->value) {
il->keydown[event->code] = false;
il->keycount--;
}
/* send event to guest when grab is active */
if (il->grab_active && !input_linux_should_skip(il, event)) {
int qcode = qemu_input_linux_to_qcode(event->code);
qemu_input_event_send_key_qcode(NULL, qcode, event->value);
}
/* hotkey -> record switch request ... */
if (input_linux_check_toggle(il)) {
il->grab_request = true;
}
/*
* ... and do the switch when all keys are lifted, so we
* confuse neither guest nor host with keys which seem to
* be stuck due to missing key-up events.
*/
if (il->grab_request && !il->keycount) {
il->grab_request = false;
input_linux_toggle_grab(il);
}
}
}
static void input_linux_event_mouse_button(int button)
{
qemu_input_queue_btn(NULL, button, true);
qemu_input_event_sync();
qemu_input_queue_btn(NULL, button, false);
qemu_input_event_sync();
}
static void input_linux_handle_mouse(InputLinux *il, struct input_event *event)
{
if (!il->grab_active) {
return;
}
switch (event->type) {
case EV_KEY:
switch (event->code) {
case BTN_LEFT:
qemu_input_queue_btn(NULL, INPUT_BUTTON_LEFT, event->value);
break;
case BTN_RIGHT:
qemu_input_queue_btn(NULL, INPUT_BUTTON_RIGHT, event->value);
break;
case BTN_MIDDLE:
qemu_input_queue_btn(NULL, INPUT_BUTTON_MIDDLE, event->value);
break;
case BTN_GEAR_UP:
qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_UP, event->value);
break;
case BTN_GEAR_DOWN:
qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_DOWN,
event->value);
break;
case BTN_SIDE:
qemu_input_queue_btn(NULL, INPUT_BUTTON_SIDE, event->value);
break;
case BTN_EXTRA:
qemu_input_queue_btn(NULL, INPUT_BUTTON_EXTRA, event->value);
break;
};
break;
case EV_REL:
switch (event->code) {
case REL_X:
qemu_input_queue_rel(NULL, INPUT_AXIS_X, event->value);
break;
case REL_Y:
qemu_input_queue_rel(NULL, INPUT_AXIS_Y, event->value);
break;
case REL_WHEEL:
il->wheel = event->value;
break;
}
break;
case EV_ABS:
switch (event->code) {
case ABS_X:
qemu_input_queue_abs(NULL, INPUT_AXIS_X, event->value,
il->abs_x_min, il->abs_x_max);
break;
case ABS_Y:
qemu_input_queue_abs(NULL, INPUT_AXIS_Y, event->value,
il->abs_y_min, il->abs_y_max);
break;
}
break;
case EV_SYN:
qemu_input_event_sync();
if (il->wheel != 0) {
input_linux_event_mouse_button((il->wheel > 0)
? INPUT_BUTTON_WHEEL_UP
: INPUT_BUTTON_WHEEL_DOWN);
il->wheel = 0;
}
break;
}
}
static void input_linux_event(void *opaque)
{
InputLinux *il = opaque;
int rc;
int read_size;
uint8_t *p = (uint8_t *)&il->event;
for (;;) {
read_size = sizeof(il->event) - il->read_offset;
rc = read(il->fd, &p[il->read_offset], read_size);
if (rc != read_size) {
if (rc < 0 && errno != EAGAIN) {
fprintf(stderr, "%s: read: %s\n", __func__, strerror(errno));
qemu_set_fd_handler(il->fd, NULL, NULL, NULL);
close(il->fd);
} else if (rc > 0) {
il->read_offset += rc;
}
break;
}
il->read_offset = 0;
if (il->num_keys) {
input_linux_handle_keyboard(il, &il->event);
}
if ((il->has_rel_x || il->has_abs_x) && il->num_btns) {
input_linux_handle_mouse(il, &il->event);
}
}
}
static void input_linux_complete(UserCreatable *uc, Error **errp)
{
InputLinux *il = INPUT_LINUX(uc);
uint8_t evtmap, relmap, absmap;
uint8_t keymap[KEY_CNT / 8], keystate[KEY_CNT / 8];
unsigned int i;
int rc, ver;
struct input_absinfo absinfo;
if (!il->evdev) {
error_setg(errp, "no input device specified");
return;
}
il->fd = open(il->evdev, O_RDWR);
if (il->fd < 0) {
error_setg_file_open(errp, errno, il->evdev);
return;
}
qemu_set_nonblock(il->fd);
rc = ioctl(il->fd, EVIOCGVERSION, &ver);
if (rc < 0) {
error_setg(errp, "%s: is not an evdev device", il->evdev);
goto err_close;
}
rc = ioctl(il->fd, EVIOCGBIT(0, sizeof(evtmap)), &evtmap);
if (rc < 0) {
error_setg(errp, "%s: failed to read event bits", il->evdev);
goto err_close;
}
if (evtmap & (1 << EV_REL)) {
relmap = 0;
rc = ioctl(il->fd, EVIOCGBIT(EV_REL, sizeof(relmap)), &relmap);
if (relmap & (1 << REL_X)) {
il->has_rel_x = true;
}
}
if (evtmap & (1 << EV_ABS)) {
absmap = 0;
rc = ioctl(il->fd, EVIOCGBIT(EV_ABS, sizeof(absmap)), &absmap);
if (absmap & (1 << ABS_X)) {
il->has_abs_x = true;
rc = ioctl(il->fd, EVIOCGABS(ABS_X), &absinfo);
il->abs_x_min = absinfo.minimum;
il->abs_x_max = absinfo.maximum;
rc = ioctl(il->fd, EVIOCGABS(ABS_Y), &absinfo);
il->abs_y_min = absinfo.minimum;
il->abs_y_max = absinfo.maximum;
}
}
if (evtmap & (1 << EV_KEY)) {
memset(keymap, 0, sizeof(keymap));
rc = ioctl(il->fd, EVIOCGBIT(EV_KEY, sizeof(keymap)), keymap);
rc = ioctl(il->fd, EVIOCGKEY(sizeof(keystate)), keystate);
for (i = 0; i < KEY_CNT; i++) {
if (keymap[i / 8] & (1 << (i % 8))) {
if (linux_is_button(i)) {
il->num_btns++;
} else {
il->num_keys++;
}
if (keystate[i / 8] & (1 << (i % 8))) {
il->keydown[i] = true;
il->keycount++;
}
}
}
}
qemu_set_fd_handler(il->fd, input_linux_event, NULL, il);
if (il->keycount) {
/* delay grab until all keys are released */
il->grab_request = true;
} else {
input_linux_toggle_grab(il);
}
QTAILQ_INSERT_TAIL(&inputs, il, next);
il->initialized = true;
return;
err_close:
close(il->fd);
return;
}
static void input_linux_instance_finalize(Object *obj)
{
InputLinux *il = INPUT_LINUX(obj);
if (il->initialized) {
QTAILQ_REMOVE(&inputs, il, next);
close(il->fd);
}
g_free(il->evdev);
}
static char *input_linux_get_evdev(Object *obj, Error **errp)
{
InputLinux *il = INPUT_LINUX(obj);
return g_strdup(il->evdev);
}
static void input_linux_set_evdev(Object *obj, const char *value,
Error **errp)
{
InputLinux *il = INPUT_LINUX(obj);
if (il->evdev) {
error_setg(errp, "evdev property already set");
return;
}
il->evdev = g_strdup(value);
}
static bool input_linux_get_grab_all(Object *obj, Error **errp)
{
InputLinux *il = INPUT_LINUX(obj);
return il->grab_all;
}
static void input_linux_set_grab_all(Object *obj, bool value,
Error **errp)
{
InputLinux *il = INPUT_LINUX(obj);
il->grab_all = value;
}
static bool input_linux_get_repeat(Object *obj, Error **errp)
{
InputLinux *il = INPUT_LINUX(obj);
return il->repeat;
}
static void input_linux_set_repeat(Object *obj, bool value,
Error **errp)
{
InputLinux *il = INPUT_LINUX(obj);
il->repeat = value;
}
static int input_linux_get_grab_toggle(Object *obj, Error **errp)
{
InputLinux *il = INPUT_LINUX(obj);
return il->grab_toggle;
}
static void input_linux_set_grab_toggle(Object *obj, int value,
Error **errp)
{
InputLinux *il = INPUT_LINUX(obj);
il->grab_toggle = value;
}
static void input_linux_instance_init(Object *obj)
{
object_property_add_str(obj, "evdev",
input_linux_get_evdev,
input_linux_set_evdev, NULL);
object_property_add_bool(obj, "grab_all",
input_linux_get_grab_all,
input_linux_set_grab_all, NULL);
object_property_add_bool(obj, "repeat",
input_linux_get_repeat,
input_linux_set_repeat, NULL);
object_property_add_enum(obj, "grab-toggle", "GrabToggleKeys",
&GrabToggleKeys_lookup,
input_linux_get_grab_toggle,
input_linux_set_grab_toggle, NULL);
}
static void input_linux_class_init(ObjectClass *oc, void *data)
{
UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
ucc->complete = input_linux_complete;
}
static const TypeInfo input_linux_info = {
.name = TYPE_INPUT_LINUX,
.parent = TYPE_OBJECT,
.class_size = sizeof(InputLinuxClass),
.class_init = input_linux_class_init,
.instance_size = sizeof(InputLinux),
.instance_init = input_linux_instance_init,
.instance_finalize = input_linux_instance_finalize,
.interfaces = (InterfaceInfo[]) {
{ TYPE_USER_CREATABLE },
{ }
}
};
static void register_types(void)
{
type_register_static(&input_linux_info);
}
type_init(register_types);
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