1 /*
2 * QEMU VMMouse emulation
3 *
4 * Copyright (C) 2007 Anthony Liguori <anthony@codemonkey.ws>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25 #include "qemu/osdep.h"
26 #include "qapi/error.h"
27 #include "ui/console.h"
28 #include "hw/i386/vmport.h"
29 #include "hw/input/i8042.h"
30 #include "hw/qdev-properties.h"
31 #include "migration/vmstate.h"
32 #include "cpu.h"
33 #include "qom/object.h"
34
35 #include "trace.h"
36
37 /* debug only vmmouse */
38 //#define DEBUG_VMMOUSE
39
40 #define VMMOUSE_READ_ID 0x45414552
41 #define VMMOUSE_DISABLE 0x000000f5
42 #define VMMOUSE_REQUEST_RELATIVE 0x4c455252
43 #define VMMOUSE_REQUEST_ABSOLUTE 0x53424152
44
45 #define VMMOUSE_QUEUE_SIZE 1024
46
47 #define VMMOUSE_VERSION 0x3442554a
48
49 #define VMMOUSE_RELATIVE_PACKET 0x00010000
50
51 #define VMMOUSE_LEFT_BUTTON 0x20
52 #define VMMOUSE_RIGHT_BUTTON 0x10
53 #define VMMOUSE_MIDDLE_BUTTON 0x08
54
55 #define VMMOUSE_MIN_X 0
56 #define VMMOUSE_MIN_Y 0
57 #define VMMOUSE_MAX_X 0xFFFF
58 #define VMMOUSE_MAX_Y 0xFFFF
59
60 #define TYPE_VMMOUSE "vmmouse"
61 OBJECT_DECLARE_SIMPLE_TYPE(VMMouseState, VMMOUSE)
62
63 struct VMMouseState {
64 ISADevice parent_obj;
65
66 uint32_t queue[VMMOUSE_QUEUE_SIZE];
67 int32_t queue_size;
68 uint16_t nb_queue;
69 uint16_t status;
70 uint8_t absolute;
71 QEMUPutMouseEntry *entry;
72 ISAKBDState *i8042;
73 };
74
vmmouse_get_data(uint32_t * data)75 static void vmmouse_get_data(uint32_t *data)
76 {
77 X86CPU *cpu = X86_CPU(current_cpu);
78 CPUX86State *env = &cpu->env;
79
80 data[0] = env->regs[R_EAX]; data[1] = env->regs[R_EBX];
81 data[2] = env->regs[R_ECX]; data[3] = env->regs[R_EDX];
82 data[4] = env->regs[R_ESI]; data[5] = env->regs[R_EDI];
83 }
84
vmmouse_set_data(const uint32_t * data)85 static void vmmouse_set_data(const uint32_t *data)
86 {
87 X86CPU *cpu = X86_CPU(current_cpu);
88 CPUX86State *env = &cpu->env;
89
90 env->regs[R_EAX] = data[0]; env->regs[R_EBX] = data[1];
91 env->regs[R_ECX] = data[2]; env->regs[R_EDX] = data[3];
92 env->regs[R_ESI] = data[4]; env->regs[R_EDI] = data[5];
93 }
94
vmmouse_get_status(VMMouseState * s)95 static uint32_t vmmouse_get_status(VMMouseState *s)
96 {
97 trace_vmmouse_get_status();
98
99 return (s->status << 16) | s->nb_queue;
100 }
101
vmmouse_mouse_event(void * opaque,int x,int y,int dz,int buttons_state)102 static void vmmouse_mouse_event(void *opaque, int x, int y, int dz, int buttons_state)
103 {
104 VMMouseState *s = opaque;
105 int buttons = 0;
106
107 if (s->nb_queue > (VMMOUSE_QUEUE_SIZE - 4))
108 return;
109
110 trace_vmmouse_mouse_event(x, y, dz, buttons_state);
111
112 if ((buttons_state & MOUSE_EVENT_LBUTTON))
113 buttons |= VMMOUSE_LEFT_BUTTON;
114 if ((buttons_state & MOUSE_EVENT_RBUTTON))
115 buttons |= VMMOUSE_RIGHT_BUTTON;
116 if ((buttons_state & MOUSE_EVENT_MBUTTON))
117 buttons |= VMMOUSE_MIDDLE_BUTTON;
118
119 if (s->absolute) {
120 x = qemu_input_scale_axis(x,
121 INPUT_EVENT_ABS_MIN, INPUT_EVENT_ABS_MAX,
122 VMMOUSE_MIN_X, VMMOUSE_MAX_X);
123 y = qemu_input_scale_axis(y,
124 INPUT_EVENT_ABS_MIN, INPUT_EVENT_ABS_MAX,
125 VMMOUSE_MIN_Y, VMMOUSE_MAX_Y);
126 } else{
127 /* add for guest vmmouse driver to judge this is a relative packet. */
128 buttons |= VMMOUSE_RELATIVE_PACKET;
129 }
130
131 s->queue[s->nb_queue++] = buttons;
132 s->queue[s->nb_queue++] = x;
133 s->queue[s->nb_queue++] = y;
134 s->queue[s->nb_queue++] = dz;
135
136 /* need to still generate PS2 events to notify driver to
137 read from queue */
138 i8042_isa_mouse_fake_event(s->i8042);
139 }
140
vmmouse_remove_handler(VMMouseState * s)141 static void vmmouse_remove_handler(VMMouseState *s)
142 {
143 if (s->entry) {
144 qemu_remove_mouse_event_handler(s->entry);
145 s->entry = NULL;
146 }
147 }
148
vmmouse_update_handler(VMMouseState * s,int absolute)149 static void vmmouse_update_handler(VMMouseState *s, int absolute)
150 {
151 if (s->status != 0) {
152 return;
153 }
154 if (s->absolute != absolute) {
155 s->absolute = absolute;
156 vmmouse_remove_handler(s);
157 }
158 if (s->entry == NULL) {
159 s->entry = qemu_add_mouse_event_handler(vmmouse_mouse_event,
160 s, s->absolute,
161 "vmmouse");
162 qemu_activate_mouse_event_handler(s->entry);
163 }
164 }
165
vmmouse_read_id(VMMouseState * s)166 static void vmmouse_read_id(VMMouseState *s)
167 {
168 trace_vmmouse_read_id();
169
170 if (s->nb_queue == VMMOUSE_QUEUE_SIZE)
171 return;
172
173 s->queue[s->nb_queue++] = VMMOUSE_VERSION;
174 s->status = 0;
175 vmmouse_update_handler(s, s->absolute);
176 }
177
vmmouse_request_relative(VMMouseState * s)178 static void vmmouse_request_relative(VMMouseState *s)
179 {
180 trace_vmmouse_request_relative();
181
182 vmmouse_update_handler(s, 0);
183 }
184
vmmouse_request_absolute(VMMouseState * s)185 static void vmmouse_request_absolute(VMMouseState *s)
186 {
187 trace_vmmouse_request_absolute();
188
189 vmmouse_update_handler(s, 1);
190 }
191
vmmouse_disable(VMMouseState * s)192 static void vmmouse_disable(VMMouseState *s)
193 {
194 trace_vmmouse_disable();
195
196 s->status = 0xffff;
197 vmmouse_remove_handler(s);
198 }
199
vmmouse_data(VMMouseState * s,uint32_t * data,uint32_t size)200 static void vmmouse_data(VMMouseState *s, uint32_t *data, uint32_t size)
201 {
202 int i;
203
204 trace_vmmouse_data(size);
205
206 if (size == 0 || size > 6 || size > s->nb_queue) {
207 printf("vmmouse: driver requested too much data %d\n", size);
208 s->status = 0xffff;
209 vmmouse_remove_handler(s);
210 return;
211 }
212
213 for (i = 0; i < size; i++)
214 data[i] = s->queue[i];
215
216 s->nb_queue -= size;
217 if (s->nb_queue)
218 memmove(s->queue, &s->queue[size], sizeof(s->queue[0]) * s->nb_queue);
219 }
220
vmmouse_ioport_read(void * opaque,uint32_t addr)221 static uint32_t vmmouse_ioport_read(void *opaque, uint32_t addr)
222 {
223 VMMouseState *s = opaque;
224 uint32_t data[6];
225 uint16_t command;
226
227 vmmouse_get_data(data);
228
229 command = data[2] & 0xFFFF;
230
231 switch (command) {
232 case VMPORT_CMD_VMMOUSE_STATUS:
233 data[0] = vmmouse_get_status(s);
234 break;
235 case VMPORT_CMD_VMMOUSE_COMMAND:
236 switch (data[1]) {
237 case VMMOUSE_DISABLE:
238 vmmouse_disable(s);
239 break;
240 case VMMOUSE_READ_ID:
241 vmmouse_read_id(s);
242 break;
243 case VMMOUSE_REQUEST_RELATIVE:
244 vmmouse_request_relative(s);
245 break;
246 case VMMOUSE_REQUEST_ABSOLUTE:
247 vmmouse_request_absolute(s);
248 break;
249 default:
250 printf("vmmouse: unknown command %x\n", data[1]);
251 break;
252 }
253 break;
254 case VMPORT_CMD_VMMOUSE_DATA:
255 vmmouse_data(s, data, data[1]);
256 break;
257 default:
258 printf("vmmouse: unknown command %x\n", command);
259 break;
260 }
261
262 vmmouse_set_data(data);
263 return data[0];
264 }
265
vmmouse_post_load(void * opaque,int version_id)266 static int vmmouse_post_load(void *opaque, int version_id)
267 {
268 VMMouseState *s = opaque;
269
270 vmmouse_remove_handler(s);
271 vmmouse_update_handler(s, s->absolute);
272 return 0;
273 }
274
275 static const VMStateDescription vmstate_vmmouse = {
276 .name = "vmmouse",
277 .version_id = 0,
278 .minimum_version_id = 0,
279 .post_load = vmmouse_post_load,
280 .fields = (const VMStateField[]) {
281 VMSTATE_INT32_EQUAL(queue_size, VMMouseState, NULL),
282 VMSTATE_UINT32_ARRAY(queue, VMMouseState, VMMOUSE_QUEUE_SIZE),
283 VMSTATE_UINT16(nb_queue, VMMouseState),
284 VMSTATE_UINT16(status, VMMouseState),
285 VMSTATE_UINT8(absolute, VMMouseState),
286 VMSTATE_END_OF_LIST()
287 }
288 };
289
vmmouse_reset(DeviceState * d)290 static void vmmouse_reset(DeviceState *d)
291 {
292 VMMouseState *s = VMMOUSE(d);
293
294 s->queue_size = VMMOUSE_QUEUE_SIZE;
295 s->nb_queue = 0;
296
297 vmmouse_disable(s);
298 }
299
vmmouse_realizefn(DeviceState * dev,Error ** errp)300 static void vmmouse_realizefn(DeviceState *dev, Error **errp)
301 {
302 VMMouseState *s = VMMOUSE(dev);
303
304 trace_vmmouse_init();
305
306 if (!s->i8042) {
307 error_setg(errp, "'i8042' link is not set");
308 return;
309 }
310 if (!object_resolve_path_type("", TYPE_VMPORT, NULL)) {
311 error_setg(errp, "vmmouse needs a machine with vmport");
312 return;
313 }
314
315 vmport_register(VMPORT_CMD_VMMOUSE_STATUS, vmmouse_ioport_read, s);
316 vmport_register(VMPORT_CMD_VMMOUSE_COMMAND, vmmouse_ioport_read, s);
317 vmport_register(VMPORT_CMD_VMMOUSE_DATA, vmmouse_ioport_read, s);
318 }
319
320 static Property vmmouse_properties[] = {
321 DEFINE_PROP_LINK("i8042", VMMouseState, i8042, TYPE_I8042, ISAKBDState *),
322 DEFINE_PROP_END_OF_LIST(),
323 };
324
vmmouse_class_initfn(ObjectClass * klass,void * data)325 static void vmmouse_class_initfn(ObjectClass *klass, void *data)
326 {
327 DeviceClass *dc = DEVICE_CLASS(klass);
328
329 dc->realize = vmmouse_realizefn;
330 dc->reset = vmmouse_reset;
331 dc->vmsd = &vmstate_vmmouse;
332 device_class_set_props(dc, vmmouse_properties);
333 set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
334 }
335
336 static const TypeInfo vmmouse_info = {
337 .name = TYPE_VMMOUSE,
338 .parent = TYPE_ISA_DEVICE,
339 .instance_size = sizeof(VMMouseState),
340 .class_init = vmmouse_class_initfn,
341 };
342
vmmouse_register_types(void)343 static void vmmouse_register_types(void)
344 {
345 type_register_static(&vmmouse_info);
346 }
347
348 type_init(vmmouse_register_types)
349