qemu/hw/i386/vmmouse.c
Zongmin Zhou fdd649538e hw/i386/vmmouse:add relative packet flag for button status
The buttons value use macros instead of direct numbers.

If request relative mode, have to add this for
guest vmmouse driver to judge this is a relative packet.
otherwise,vmmouse driver will not match
the condition 'status & VMMOUSE_RELATIVE_PACKET',
and can't report events on the correct(relative) input device,
result to relative mode unuseful.

Signed-off-by: Zongmin Zhou<zhouzongmin@kylinos.cn>
Message-ID: <20230413081526.2229916-1-zhouzongmin@kylinos.cn>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2023-08-07 15:50:31 +04:00

341 lines
9.1 KiB
C

/*
* QEMU VMMouse emulation
*
* Copyright (C) 2007 Anthony Liguori <anthony@codemonkey.ws>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "ui/console.h"
#include "hw/i386/vmport.h"
#include "hw/input/i8042.h"
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#include "cpu.h"
#include "qom/object.h"
/* debug only vmmouse */
//#define DEBUG_VMMOUSE
#define VMMOUSE_READ_ID 0x45414552
#define VMMOUSE_DISABLE 0x000000f5
#define VMMOUSE_REQUEST_RELATIVE 0x4c455252
#define VMMOUSE_REQUEST_ABSOLUTE 0x53424152
#define VMMOUSE_QUEUE_SIZE 1024
#define VMMOUSE_VERSION 0x3442554a
#define VMMOUSE_RELATIVE_PACKET 0x00010000
#define VMMOUSE_LEFT_BUTTON 0x20
#define VMMOUSE_RIGHT_BUTTON 0x10
#define VMMOUSE_MIDDLE_BUTTON 0x08
#ifdef DEBUG_VMMOUSE
#define DPRINTF(fmt, ...) printf(fmt, ## __VA_ARGS__)
#else
#define DPRINTF(fmt, ...) do { } while (0)
#endif
#define TYPE_VMMOUSE "vmmouse"
OBJECT_DECLARE_SIMPLE_TYPE(VMMouseState, VMMOUSE)
struct VMMouseState {
ISADevice parent_obj;
uint32_t queue[VMMOUSE_QUEUE_SIZE];
int32_t queue_size;
uint16_t nb_queue;
uint16_t status;
uint8_t absolute;
QEMUPutMouseEntry *entry;
ISAKBDState *i8042;
};
static void vmmouse_get_data(uint32_t *data)
{
X86CPU *cpu = X86_CPU(current_cpu);
CPUX86State *env = &cpu->env;
data[0] = env->regs[R_EAX]; data[1] = env->regs[R_EBX];
data[2] = env->regs[R_ECX]; data[3] = env->regs[R_EDX];
data[4] = env->regs[R_ESI]; data[5] = env->regs[R_EDI];
}
static void vmmouse_set_data(const uint32_t *data)
{
X86CPU *cpu = X86_CPU(current_cpu);
CPUX86State *env = &cpu->env;
env->regs[R_EAX] = data[0]; env->regs[R_EBX] = data[1];
env->regs[R_ECX] = data[2]; env->regs[R_EDX] = data[3];
env->regs[R_ESI] = data[4]; env->regs[R_EDI] = data[5];
}
static uint32_t vmmouse_get_status(VMMouseState *s)
{
DPRINTF("vmmouse_get_status()\n");
return (s->status << 16) | s->nb_queue;
}
static void vmmouse_mouse_event(void *opaque, int x, int y, int dz, int buttons_state)
{
VMMouseState *s = opaque;
int buttons = 0;
if (s->nb_queue > (VMMOUSE_QUEUE_SIZE - 4))
return;
DPRINTF("vmmouse_mouse_event(%d, %d, %d, %d)\n",
x, y, dz, buttons_state);
if ((buttons_state & MOUSE_EVENT_LBUTTON))
buttons |= VMMOUSE_LEFT_BUTTON;
if ((buttons_state & MOUSE_EVENT_RBUTTON))
buttons |= VMMOUSE_RIGHT_BUTTON;
if ((buttons_state & MOUSE_EVENT_MBUTTON))
buttons |= VMMOUSE_MIDDLE_BUTTON;
if (s->absolute) {
x <<= 1;
y <<= 1;
} else{
/* add for guest vmmouse driver to judge this is a relative packet. */
buttons |= VMMOUSE_RELATIVE_PACKET;
}
s->queue[s->nb_queue++] = buttons;
s->queue[s->nb_queue++] = x;
s->queue[s->nb_queue++] = y;
s->queue[s->nb_queue++] = dz;
/* need to still generate PS2 events to notify driver to
read from queue */
i8042_isa_mouse_fake_event(s->i8042);
}
static void vmmouse_remove_handler(VMMouseState *s)
{
if (s->entry) {
qemu_remove_mouse_event_handler(s->entry);
s->entry = NULL;
}
}
static void vmmouse_update_handler(VMMouseState *s, int absolute)
{
if (s->status != 0) {
return;
}
if (s->absolute != absolute) {
s->absolute = absolute;
vmmouse_remove_handler(s);
}
if (s->entry == NULL) {
s->entry = qemu_add_mouse_event_handler(vmmouse_mouse_event,
s, s->absolute,
"vmmouse");
qemu_activate_mouse_event_handler(s->entry);
}
}
static void vmmouse_read_id(VMMouseState *s)
{
DPRINTF("vmmouse_read_id()\n");
if (s->nb_queue == VMMOUSE_QUEUE_SIZE)
return;
s->queue[s->nb_queue++] = VMMOUSE_VERSION;
s->status = 0;
vmmouse_update_handler(s, s->absolute);
}
static void vmmouse_request_relative(VMMouseState *s)
{
DPRINTF("vmmouse_request_relative()\n");
vmmouse_update_handler(s, 0);
}
static void vmmouse_request_absolute(VMMouseState *s)
{
DPRINTF("vmmouse_request_absolute()\n");
vmmouse_update_handler(s, 1);
}
static void vmmouse_disable(VMMouseState *s)
{
DPRINTF("vmmouse_disable()\n");
s->status = 0xffff;
vmmouse_remove_handler(s);
}
static void vmmouse_data(VMMouseState *s, uint32_t *data, uint32_t size)
{
int i;
DPRINTF("vmmouse_data(%d)\n", size);
if (size == 0 || size > 6 || size > s->nb_queue) {
printf("vmmouse: driver requested too much data %d\n", size);
s->status = 0xffff;
vmmouse_remove_handler(s);
return;
}
for (i = 0; i < size; i++)
data[i] = s->queue[i];
s->nb_queue -= size;
if (s->nb_queue)
memmove(s->queue, &s->queue[size], sizeof(s->queue[0]) * s->nb_queue);
}
static uint32_t vmmouse_ioport_read(void *opaque, uint32_t addr)
{
VMMouseState *s = opaque;
uint32_t data[6];
uint16_t command;
vmmouse_get_data(data);
command = data[2] & 0xFFFF;
switch (command) {
case VMPORT_CMD_VMMOUSE_STATUS:
data[0] = vmmouse_get_status(s);
break;
case VMPORT_CMD_VMMOUSE_COMMAND:
switch (data[1]) {
case VMMOUSE_DISABLE:
vmmouse_disable(s);
break;
case VMMOUSE_READ_ID:
vmmouse_read_id(s);
break;
case VMMOUSE_REQUEST_RELATIVE:
vmmouse_request_relative(s);
break;
case VMMOUSE_REQUEST_ABSOLUTE:
vmmouse_request_absolute(s);
break;
default:
printf("vmmouse: unknown command %x\n", data[1]);
break;
}
break;
case VMPORT_CMD_VMMOUSE_DATA:
vmmouse_data(s, data, data[1]);
break;
default:
printf("vmmouse: unknown command %x\n", command);
break;
}
vmmouse_set_data(data);
return data[0];
}
static int vmmouse_post_load(void *opaque, int version_id)
{
VMMouseState *s = opaque;
vmmouse_remove_handler(s);
vmmouse_update_handler(s, s->absolute);
return 0;
}
static const VMStateDescription vmstate_vmmouse = {
.name = "vmmouse",
.version_id = 0,
.minimum_version_id = 0,
.post_load = vmmouse_post_load,
.fields = (VMStateField[]) {
VMSTATE_INT32_EQUAL(queue_size, VMMouseState, NULL),
VMSTATE_UINT32_ARRAY(queue, VMMouseState, VMMOUSE_QUEUE_SIZE),
VMSTATE_UINT16(nb_queue, VMMouseState),
VMSTATE_UINT16(status, VMMouseState),
VMSTATE_UINT8(absolute, VMMouseState),
VMSTATE_END_OF_LIST()
}
};
static void vmmouse_reset(DeviceState *d)
{
VMMouseState *s = VMMOUSE(d);
s->queue_size = VMMOUSE_QUEUE_SIZE;
s->nb_queue = 0;
vmmouse_disable(s);
}
static void vmmouse_realizefn(DeviceState *dev, Error **errp)
{
VMMouseState *s = VMMOUSE(dev);
DPRINTF("vmmouse_init\n");
if (!s->i8042) {
error_setg(errp, "'i8042' link is not set");
return;
}
if (!object_resolve_path_type("", TYPE_VMPORT, NULL)) {
error_setg(errp, "vmmouse needs a machine with vmport");
return;
}
vmport_register(VMPORT_CMD_VMMOUSE_STATUS, vmmouse_ioport_read, s);
vmport_register(VMPORT_CMD_VMMOUSE_COMMAND, vmmouse_ioport_read, s);
vmport_register(VMPORT_CMD_VMMOUSE_DATA, vmmouse_ioport_read, s);
}
static Property vmmouse_properties[] = {
DEFINE_PROP_LINK("i8042", VMMouseState, i8042, TYPE_I8042, ISAKBDState *),
DEFINE_PROP_END_OF_LIST(),
};
static void vmmouse_class_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = vmmouse_realizefn;
dc->reset = vmmouse_reset;
dc->vmsd = &vmstate_vmmouse;
device_class_set_props(dc, vmmouse_properties);
set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
}
static const TypeInfo vmmouse_info = {
.name = TYPE_VMMOUSE,
.parent = TYPE_ISA_DEVICE,
.instance_size = sizeof(VMMouseState),
.class_init = vmmouse_class_initfn,
};
static void vmmouse_register_types(void)
{
type_register_static(&vmmouse_info);
}
type_init(vmmouse_register_types)