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d755defd5d
This patch adds support for absolute pointer events to the input-linux subsystem. This support was omitted from the original input-linux patch, however most of the code required for it is already in place. Support for absolute events is especially useful for guests with vga passthrough. Since they have a physical monitor, none of normal channels for sending video output (vnc, etc) are used, meaning they also can't be used to send absolute input events. This leaves QMP as the only option to send absolute input into vga passthrough guests, which is not its intended use and is not efficient. This patch allows, for example, uinput to be used to create virtual absolute input devices. This lets you build external systems which share physical input devices between guests. Without absolute input capability, such external systems can't seamlessly share pointer devices between guests. Signed-off-by: Philippe Voinov <philippevoinov@gmail.com> Message-id: 20170505134231.30210-1-philippevoinov@gmail.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
566 lines
17 KiB
C
566 lines
17 KiB
C
/*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* (at your option) any later version. See the COPYING file in the
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* top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "qemu-common.h"
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#include "qemu/config-file.h"
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#include "qemu/sockets.h"
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#include "sysemu/sysemu.h"
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#include "ui/input.h"
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#include "qom/object_interfaces.h"
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#include <sys/ioctl.h>
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#include "standard-headers/linux/input.h"
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static int linux_to_qcode[KEY_CNT] = {
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[KEY_ESC] = Q_KEY_CODE_ESC,
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[KEY_1] = Q_KEY_CODE_1,
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[KEY_2] = Q_KEY_CODE_2,
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[KEY_3] = Q_KEY_CODE_3,
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[KEY_4] = Q_KEY_CODE_4,
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[KEY_5] = Q_KEY_CODE_5,
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[KEY_6] = Q_KEY_CODE_6,
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[KEY_7] = Q_KEY_CODE_7,
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[KEY_8] = Q_KEY_CODE_8,
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[KEY_9] = Q_KEY_CODE_9,
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[KEY_0] = Q_KEY_CODE_0,
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[KEY_MINUS] = Q_KEY_CODE_MINUS,
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[KEY_EQUAL] = Q_KEY_CODE_EQUAL,
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[KEY_BACKSPACE] = Q_KEY_CODE_BACKSPACE,
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[KEY_TAB] = Q_KEY_CODE_TAB,
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[KEY_Q] = Q_KEY_CODE_Q,
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[KEY_W] = Q_KEY_CODE_W,
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[KEY_E] = Q_KEY_CODE_E,
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[KEY_R] = Q_KEY_CODE_R,
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[KEY_T] = Q_KEY_CODE_T,
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[KEY_Y] = Q_KEY_CODE_Y,
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[KEY_U] = Q_KEY_CODE_U,
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[KEY_I] = Q_KEY_CODE_I,
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[KEY_O] = Q_KEY_CODE_O,
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[KEY_P] = Q_KEY_CODE_P,
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[KEY_LEFTBRACE] = Q_KEY_CODE_BRACKET_LEFT,
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[KEY_RIGHTBRACE] = Q_KEY_CODE_BRACKET_RIGHT,
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[KEY_ENTER] = Q_KEY_CODE_RET,
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[KEY_LEFTCTRL] = Q_KEY_CODE_CTRL,
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[KEY_A] = Q_KEY_CODE_A,
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[KEY_S] = Q_KEY_CODE_S,
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[KEY_D] = Q_KEY_CODE_D,
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[KEY_F] = Q_KEY_CODE_F,
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[KEY_G] = Q_KEY_CODE_G,
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[KEY_H] = Q_KEY_CODE_H,
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[KEY_J] = Q_KEY_CODE_J,
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[KEY_K] = Q_KEY_CODE_K,
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[KEY_L] = Q_KEY_CODE_L,
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[KEY_SEMICOLON] = Q_KEY_CODE_SEMICOLON,
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[KEY_APOSTROPHE] = Q_KEY_CODE_APOSTROPHE,
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[KEY_GRAVE] = Q_KEY_CODE_GRAVE_ACCENT,
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[KEY_LEFTSHIFT] = Q_KEY_CODE_SHIFT,
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[KEY_BACKSLASH] = Q_KEY_CODE_BACKSLASH,
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[KEY_102ND] = Q_KEY_CODE_LESS,
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[KEY_Z] = Q_KEY_CODE_Z,
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[KEY_X] = Q_KEY_CODE_X,
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[KEY_C] = Q_KEY_CODE_C,
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[KEY_V] = Q_KEY_CODE_V,
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[KEY_B] = Q_KEY_CODE_B,
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[KEY_N] = Q_KEY_CODE_N,
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[KEY_M] = Q_KEY_CODE_M,
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[KEY_COMMA] = Q_KEY_CODE_COMMA,
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[KEY_DOT] = Q_KEY_CODE_DOT,
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[KEY_SLASH] = Q_KEY_CODE_SLASH,
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[KEY_RIGHTSHIFT] = Q_KEY_CODE_SHIFT_R,
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[KEY_LEFTALT] = Q_KEY_CODE_ALT,
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[KEY_SPACE] = Q_KEY_CODE_SPC,
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[KEY_CAPSLOCK] = Q_KEY_CODE_CAPS_LOCK,
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[KEY_F1] = Q_KEY_CODE_F1,
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[KEY_F2] = Q_KEY_CODE_F2,
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[KEY_F3] = Q_KEY_CODE_F3,
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[KEY_F4] = Q_KEY_CODE_F4,
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[KEY_F5] = Q_KEY_CODE_F5,
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[KEY_F6] = Q_KEY_CODE_F6,
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[KEY_F7] = Q_KEY_CODE_F7,
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[KEY_F8] = Q_KEY_CODE_F8,
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[KEY_F9] = Q_KEY_CODE_F9,
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[KEY_F10] = Q_KEY_CODE_F10,
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[KEY_NUMLOCK] = Q_KEY_CODE_NUM_LOCK,
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[KEY_SCROLLLOCK] = Q_KEY_CODE_SCROLL_LOCK,
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[KEY_KP0] = Q_KEY_CODE_KP_0,
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[KEY_KP1] = Q_KEY_CODE_KP_1,
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[KEY_KP2] = Q_KEY_CODE_KP_2,
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[KEY_KP3] = Q_KEY_CODE_KP_3,
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[KEY_KP4] = Q_KEY_CODE_KP_4,
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[KEY_KP5] = Q_KEY_CODE_KP_5,
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[KEY_KP6] = Q_KEY_CODE_KP_6,
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[KEY_KP7] = Q_KEY_CODE_KP_7,
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[KEY_KP8] = Q_KEY_CODE_KP_8,
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[KEY_KP9] = Q_KEY_CODE_KP_9,
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[KEY_KPMINUS] = Q_KEY_CODE_KP_SUBTRACT,
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[KEY_KPPLUS] = Q_KEY_CODE_KP_ADD,
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[KEY_KPDOT] = Q_KEY_CODE_KP_DECIMAL,
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[KEY_KPENTER] = Q_KEY_CODE_KP_ENTER,
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[KEY_KPSLASH] = Q_KEY_CODE_KP_DIVIDE,
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[KEY_KPASTERISK] = Q_KEY_CODE_KP_MULTIPLY,
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[KEY_F11] = Q_KEY_CODE_F11,
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[KEY_F12] = Q_KEY_CODE_F12,
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[KEY_RIGHTCTRL] = Q_KEY_CODE_CTRL_R,
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[KEY_SYSRQ] = Q_KEY_CODE_SYSRQ,
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[KEY_RIGHTALT] = Q_KEY_CODE_ALT_R,
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[KEY_HOME] = Q_KEY_CODE_HOME,
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[KEY_UP] = Q_KEY_CODE_UP,
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[KEY_PAGEUP] = Q_KEY_CODE_PGUP,
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[KEY_LEFT] = Q_KEY_CODE_LEFT,
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[KEY_RIGHT] = Q_KEY_CODE_RIGHT,
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[KEY_END] = Q_KEY_CODE_END,
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[KEY_DOWN] = Q_KEY_CODE_DOWN,
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[KEY_PAGEDOWN] = Q_KEY_CODE_PGDN,
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[KEY_INSERT] = Q_KEY_CODE_INSERT,
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[KEY_DELETE] = Q_KEY_CODE_DELETE,
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[KEY_LEFTMETA] = Q_KEY_CODE_META_L,
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[KEY_RIGHTMETA] = Q_KEY_CODE_META_R,
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[KEY_MENU] = Q_KEY_CODE_MENU,
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};
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static int qemu_input_linux_to_qcode(unsigned int lnx)
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{
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assert(lnx < KEY_CNT);
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return linux_to_qcode[lnx];
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}
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static bool linux_is_button(unsigned int lnx)
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{
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if (lnx < 0x100) {
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return false;
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}
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if (lnx >= 0x160 && lnx < 0x2c0) {
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return false;
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}
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return true;
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}
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#define TYPE_INPUT_LINUX "input-linux"
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#define INPUT_LINUX(obj) \
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OBJECT_CHECK(InputLinux, (obj), TYPE_INPUT_LINUX)
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#define INPUT_LINUX_GET_CLASS(obj) \
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OBJECT_GET_CLASS(InputLinuxClass, (obj), TYPE_INPUT_LINUX)
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#define INPUT_LINUX_CLASS(klass) \
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OBJECT_CLASS_CHECK(InputLinuxClass, (klass), TYPE_INPUT_LINUX)
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typedef struct InputLinux InputLinux;
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typedef struct InputLinuxClass InputLinuxClass;
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struct InputLinux {
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Object parent;
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char *evdev;
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int fd;
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bool repeat;
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bool grab_request;
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bool grab_active;
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bool grab_all;
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bool keydown[KEY_CNT];
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int keycount;
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int wheel;
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bool initialized;
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bool has_rel_x;
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bool has_abs_x;
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int num_keys;
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int num_btns;
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int abs_x_min;
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int abs_x_max;
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int abs_y_min;
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int abs_y_max;
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struct input_event event;
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int read_offset;
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QTAILQ_ENTRY(InputLinux) next;
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};
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struct InputLinuxClass {
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ObjectClass parent_class;
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};
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static QTAILQ_HEAD(, InputLinux) inputs = QTAILQ_HEAD_INITIALIZER(inputs);
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static void input_linux_toggle_grab(InputLinux *il)
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{
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intptr_t request = !il->grab_active;
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InputLinux *item;
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int rc;
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rc = ioctl(il->fd, EVIOCGRAB, request);
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if (rc < 0) {
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return;
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}
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il->grab_active = !il->grab_active;
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if (!il->grab_all) {
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return;
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}
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QTAILQ_FOREACH(item, &inputs, next) {
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if (item == il || item->grab_all) {
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/* avoid endless loops */
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continue;
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}
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if (item->grab_active != il->grab_active) {
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input_linux_toggle_grab(item);
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}
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}
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}
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static void input_linux_handle_keyboard(InputLinux *il,
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struct input_event *event)
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{
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if (event->type == EV_KEY) {
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if (event->value > 2 || (event->value > 1 && !il->repeat)) {
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/*
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* ignore autorepeat + unknown key events
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* 0 == up, 1 == down, 2 == autorepeat, other == undefined
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*/
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return;
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}
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if (event->code >= KEY_CNT) {
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/*
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* Should not happen. But better safe than sorry,
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* and we make Coverity happy too.
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*/
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return;
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}
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/* keep track of key state */
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if (!il->keydown[event->code] && event->value) {
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il->keydown[event->code] = true;
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il->keycount++;
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}
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if (il->keydown[event->code] && !event->value) {
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il->keydown[event->code] = false;
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il->keycount--;
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}
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/* send event to guest when grab is active */
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if (il->grab_active) {
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int qcode = qemu_input_linux_to_qcode(event->code);
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qemu_input_event_send_key_qcode(NULL, qcode, event->value);
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}
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/* hotkey -> record switch request ... */
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if (il->keydown[KEY_LEFTCTRL] &&
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il->keydown[KEY_RIGHTCTRL]) {
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il->grab_request = true;
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}
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/*
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* ... and do the switch when all keys are lifted, so we
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* confuse neither guest nor host with keys which seem to
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* be stuck due to missing key-up events.
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*/
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if (il->grab_request && !il->keycount) {
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il->grab_request = false;
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input_linux_toggle_grab(il);
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}
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}
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}
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static void input_linux_event_mouse_button(int button)
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{
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qemu_input_queue_btn(NULL, button, true);
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qemu_input_event_sync();
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qemu_input_queue_btn(NULL, button, false);
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qemu_input_event_sync();
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}
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static void input_linux_handle_mouse(InputLinux *il, struct input_event *event)
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{
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if (!il->grab_active) {
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return;
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}
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switch (event->type) {
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case EV_KEY:
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switch (event->code) {
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case BTN_LEFT:
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qemu_input_queue_btn(NULL, INPUT_BUTTON_LEFT, event->value);
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break;
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case BTN_RIGHT:
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qemu_input_queue_btn(NULL, INPUT_BUTTON_RIGHT, event->value);
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break;
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case BTN_MIDDLE:
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qemu_input_queue_btn(NULL, INPUT_BUTTON_MIDDLE, event->value);
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break;
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case BTN_GEAR_UP:
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qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_UP, event->value);
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break;
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case BTN_GEAR_DOWN:
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qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_DOWN,
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event->value);
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break;
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case BTN_SIDE:
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qemu_input_queue_btn(NULL, INPUT_BUTTON_SIDE, event->value);
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break;
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case BTN_EXTRA:
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qemu_input_queue_btn(NULL, INPUT_BUTTON_EXTRA, event->value);
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break;
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};
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break;
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case EV_REL:
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switch (event->code) {
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case REL_X:
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qemu_input_queue_rel(NULL, INPUT_AXIS_X, event->value);
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break;
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case REL_Y:
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qemu_input_queue_rel(NULL, INPUT_AXIS_Y, event->value);
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break;
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case REL_WHEEL:
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il->wheel = event->value;
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break;
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}
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break;
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case EV_ABS:
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switch (event->code) {
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case ABS_X:
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qemu_input_queue_abs(NULL, INPUT_AXIS_X, event->value,
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il->abs_x_min, il->abs_x_max);
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break;
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case ABS_Y:
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qemu_input_queue_abs(NULL, INPUT_AXIS_Y, event->value,
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il->abs_y_min, il->abs_y_max);
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break;
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}
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break;
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case EV_SYN:
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qemu_input_event_sync();
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if (il->wheel != 0) {
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input_linux_event_mouse_button((il->wheel > 0)
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? INPUT_BUTTON_WHEEL_UP
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: INPUT_BUTTON_WHEEL_DOWN);
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il->wheel = 0;
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}
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break;
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}
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}
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static void input_linux_event(void *opaque)
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{
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InputLinux *il = opaque;
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int rc;
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int read_size;
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uint8_t *p = (uint8_t *)&il->event;
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for (;;) {
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read_size = sizeof(il->event) - il->read_offset;
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rc = read(il->fd, &p[il->read_offset], read_size);
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if (rc != read_size) {
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if (rc < 0 && errno != EAGAIN) {
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fprintf(stderr, "%s: read: %s\n", __func__, strerror(errno));
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qemu_set_fd_handler(il->fd, NULL, NULL, NULL);
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close(il->fd);
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} else if (rc > 0) {
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il->read_offset += rc;
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}
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break;
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}
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il->read_offset = 0;
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if (il->num_keys) {
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input_linux_handle_keyboard(il, &il->event);
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}
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if ((il->has_rel_x || il->has_abs_x) && il->num_btns) {
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input_linux_handle_mouse(il, &il->event);
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}
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}
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}
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static void input_linux_complete(UserCreatable *uc, Error **errp)
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{
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InputLinux *il = INPUT_LINUX(uc);
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uint8_t evtmap, relmap, absmap;
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uint8_t keymap[KEY_CNT / 8], keystate[KEY_CNT / 8];
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unsigned int i;
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int rc, ver;
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struct input_absinfo absinfo;
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if (!il->evdev) {
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error_setg(errp, "no input device specified");
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return;
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}
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il->fd = open(il->evdev, O_RDWR);
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if (il->fd < 0) {
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error_setg_file_open(errp, errno, il->evdev);
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return;
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}
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qemu_set_nonblock(il->fd);
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rc = ioctl(il->fd, EVIOCGVERSION, &ver);
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if (rc < 0) {
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error_setg(errp, "%s: is not an evdev device", il->evdev);
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goto err_close;
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}
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rc = ioctl(il->fd, EVIOCGBIT(0, sizeof(evtmap)), &evtmap);
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if (rc < 0) {
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error_setg(errp, "%s: failed to read event bits", il->evdev);
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goto err_close;
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}
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if (evtmap & (1 << EV_REL)) {
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relmap = 0;
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rc = ioctl(il->fd, EVIOCGBIT(EV_REL, sizeof(relmap)), &relmap);
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if (relmap & (1 << REL_X)) {
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il->has_rel_x = true;
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}
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}
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if (evtmap & (1 << EV_ABS)) {
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absmap = 0;
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rc = ioctl(il->fd, EVIOCGBIT(EV_ABS, sizeof(absmap)), &absmap);
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if (absmap & (1 << ABS_X)) {
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il->has_abs_x = true;
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rc = ioctl(il->fd, EVIOCGABS(ABS_X), &absinfo);
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il->abs_x_min = absinfo.minimum;
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il->abs_x_max = absinfo.maximum;
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rc = ioctl(il->fd, EVIOCGABS(ABS_Y), &absinfo);
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il->abs_y_min = absinfo.minimum;
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il->abs_y_max = absinfo.maximum;
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}
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}
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if (evtmap & (1 << EV_KEY)) {
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memset(keymap, 0, sizeof(keymap));
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rc = ioctl(il->fd, EVIOCGBIT(EV_KEY, sizeof(keymap)), keymap);
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rc = ioctl(il->fd, EVIOCGKEY(sizeof(keystate)), keystate);
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for (i = 0; i < KEY_CNT; i++) {
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if (keymap[i / 8] & (1 << (i % 8))) {
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if (linux_is_button(i)) {
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il->num_btns++;
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} else {
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il->num_keys++;
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}
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if (keystate[i / 8] & (1 << (i % 8))) {
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il->keydown[i] = true;
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il->keycount++;
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}
|
|
}
|
|
}
|
|
}
|
|
|
|
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 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);
|
|
}
|
|
|
|
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);
|