Revision a229c053
| b/hw/usb/host-linux.c | ||
|---|---|---|
| 111 | 111 |
uint32_t iso_urb_count; |
| 112 | 112 |
uint32_t options; |
| 113 | 113 |
Notifier exit; |
| 114 |
QEMUBH *bh; |
|
| 114 | 115 |
|
| 115 | 116 |
struct endp_data ep_in[USB_MAX_ENDPOINTS]; |
| 116 | 117 |
struct endp_data ep_out[USB_MAX_ENDPOINTS]; |
| ... | ... | |
| 1421 | 1422 |
} |
| 1422 | 1423 |
} |
| 1423 | 1424 |
|
| 1425 |
/* |
|
| 1426 |
* This is *NOT* about restoring state. We have absolutely no idea |
|
| 1427 |
* what state the host device is in at the moment and whenever it is |
|
| 1428 |
* still present in the first place. Attemping to contine where we |
|
| 1429 |
* left off is impossible. |
|
| 1430 |
* |
|
| 1431 |
* What we are going to to to here is emulate a surprise removal of |
|
| 1432 |
* the usb device passed through, then kick host scan so the device |
|
| 1433 |
* will get re-attached (and re-initialized by the guest) in case it |
|
| 1434 |
* is still present. |
|
| 1435 |
* |
|
| 1436 |
* As the device removal will change the state of other devices (usb |
|
| 1437 |
* host controller, most likely interrupt controller too) we have to |
|
| 1438 |
* wait with it until *all* vmstate is loaded. Thus post_load just |
|
| 1439 |
* kicks a bottom half which then does the actual work. |
|
| 1440 |
*/ |
|
| 1441 |
static void usb_host_post_load_bh(void *opaque) |
|
| 1442 |
{
|
|
| 1443 |
USBHostDevice *dev = opaque; |
|
| 1444 |
|
|
| 1445 |
if (dev->fd != -1) {
|
|
| 1446 |
usb_host_close(dev); |
|
| 1447 |
} |
|
| 1448 |
if (dev->dev.attached) {
|
|
| 1449 |
usb_device_detach(&dev->dev); |
|
| 1450 |
} |
|
| 1451 |
usb_host_auto_check(NULL); |
|
| 1452 |
} |
|
| 1453 |
|
|
| 1454 |
static int usb_host_post_load(void *opaque, int version_id) |
|
| 1455 |
{
|
|
| 1456 |
USBHostDevice *dev = opaque; |
|
| 1457 |
|
|
| 1458 |
qemu_bh_schedule(dev->bh); |
|
| 1459 |
return 0; |
|
| 1460 |
} |
|
| 1461 |
|
|
| 1424 | 1462 |
static int usb_host_initfn(USBDevice *dev) |
| 1425 | 1463 |
{
|
| 1426 | 1464 |
USBHostDevice *s = DO_UPCAST(USBHostDevice, dev, dev); |
| ... | ... | |
| 1432 | 1470 |
QTAILQ_INSERT_TAIL(&hostdevs, s, next); |
| 1433 | 1471 |
s->exit.notify = usb_host_exit_notifier; |
| 1434 | 1472 |
qemu_add_exit_notifier(&s->exit); |
| 1473 |
s->bh = qemu_bh_new(usb_host_post_load_bh, s); |
|
| 1435 | 1474 |
usb_host_auto_check(NULL); |
| 1436 | 1475 |
|
| 1437 | 1476 |
if (s->match.bus_num != 0 && s->match.port != NULL) {
|
| ... | ... | |
| 1443 | 1482 |
|
| 1444 | 1483 |
static const VMStateDescription vmstate_usb_host = {
|
| 1445 | 1484 |
.name = "usb-host", |
| 1446 |
.unmigratable = 1, |
|
| 1485 |
.version_id = 1, |
|
| 1486 |
.minimum_version_id = 1, |
|
| 1487 |
.post_load = usb_host_post_load, |
|
| 1488 |
.fields = (VMStateField[]) {
|
|
| 1489 |
VMSTATE_USB_DEVICE(dev, USBHostDevice), |
|
| 1490 |
VMSTATE_END_OF_LIST() |
|
| 1491 |
} |
|
| 1447 | 1492 |
}; |
| 1448 | 1493 |
|
| 1449 | 1494 |
static Property usb_host_dev_properties[] = {
|
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