diff options
| -rw-r--r-- | drivers/char/virtio_console.c | 49 | ||||
| -rw-r--r-- | include/linux/virtio_console.h | 23 |
2 files changed, 41 insertions, 31 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 86e9011325dc..196428c2287a 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c | |||
| @@ -33,6 +33,35 @@ | |||
| 33 | #include <linux/workqueue.h> | 33 | #include <linux/workqueue.h> |
| 34 | #include "hvc_console.h" | 34 | #include "hvc_console.h" |
| 35 | 35 | ||
| 36 | /* Moved here from .h file in order to disable MULTIPORT. */ | ||
| 37 | #define VIRTIO_CONSOLE_F_MULTIPORT 1 /* Does host provide multiple ports? */ | ||
| 38 | |||
| 39 | struct virtio_console_multiport_conf { | ||
| 40 | struct virtio_console_config config; | ||
| 41 | /* max. number of ports this device can hold */ | ||
| 42 | __u32 max_nr_ports; | ||
| 43 | /* number of ports added so far */ | ||
| 44 | __u32 nr_ports; | ||
| 45 | } __attribute__((packed)); | ||
| 46 | |||
| 47 | /* | ||
| 48 | * A message that's passed between the Host and the Guest for a | ||
| 49 | * particular port. | ||
| 50 | */ | ||
| 51 | struct virtio_console_control { | ||
| 52 | __u32 id; /* Port number */ | ||
| 53 | __u16 event; /* The kind of control event (see below) */ | ||
| 54 | __u16 value; /* Extra information for the key */ | ||
| 55 | }; | ||
| 56 | |||
| 57 | /* Some events for control messages */ | ||
| 58 | #define VIRTIO_CONSOLE_PORT_READY 0 | ||
| 59 | #define VIRTIO_CONSOLE_CONSOLE_PORT 1 | ||
| 60 | #define VIRTIO_CONSOLE_RESIZE 2 | ||
| 61 | #define VIRTIO_CONSOLE_PORT_OPEN 3 | ||
| 62 | #define VIRTIO_CONSOLE_PORT_NAME 4 | ||
| 63 | #define VIRTIO_CONSOLE_PORT_REMOVE 5 | ||
| 64 | |||
| 36 | /* | 65 | /* |
| 37 | * This is a global struct for storing common data for all the devices | 66 | * This is a global struct for storing common data for all the devices |
| 38 | * this driver handles. | 67 | * this driver handles. |
| @@ -121,7 +150,7 @@ struct ports_device { | |||
| 121 | spinlock_t cvq_lock; | 150 | spinlock_t cvq_lock; |
| 122 | 151 | ||
| 123 | /* The current config space is stored here */ | 152 | /* The current config space is stored here */ |
| 124 | struct virtio_console_config config; | 153 | struct virtio_console_multiport_conf config; |
| 125 | 154 | ||
| 126 | /* The virtio device we're associated with */ | 155 | /* The virtio device we're associated with */ |
| 127 | struct virtio_device *vdev; | 156 | struct virtio_device *vdev; |
| @@ -1214,7 +1243,7 @@ fail: | |||
| 1214 | */ | 1243 | */ |
| 1215 | static void config_work_handler(struct work_struct *work) | 1244 | static void config_work_handler(struct work_struct *work) |
| 1216 | { | 1245 | { |
| 1217 | struct virtio_console_config virtconconf; | 1246 | struct virtio_console_multiport_conf virtconconf; |
| 1218 | struct ports_device *portdev; | 1247 | struct ports_device *portdev; |
| 1219 | struct virtio_device *vdev; | 1248 | struct virtio_device *vdev; |
| 1220 | int err; | 1249 | int err; |
| @@ -1223,7 +1252,8 @@ static void config_work_handler(struct work_struct *work) | |||
| 1223 | 1252 | ||
| 1224 | vdev = portdev->vdev; | 1253 | vdev = portdev->vdev; |
| 1225 | vdev->config->get(vdev, | 1254 | vdev->config->get(vdev, |
| 1226 | offsetof(struct virtio_console_config, nr_ports), | 1255 | offsetof(struct virtio_console_multiport_conf, |
| 1256 | nr_ports), | ||
| 1227 | &virtconconf.nr_ports, | 1257 | &virtconconf.nr_ports, |
| 1228 | sizeof(virtconconf.nr_ports)); | 1258 | sizeof(virtconconf.nr_ports)); |
| 1229 | 1259 | ||
| @@ -1415,16 +1445,19 @@ static int __devinit virtcons_probe(struct virtio_device *vdev) | |||
| 1415 | multiport = false; | 1445 | multiport = false; |
| 1416 | portdev->config.nr_ports = 1; | 1446 | portdev->config.nr_ports = 1; |
| 1417 | portdev->config.max_nr_ports = 1; | 1447 | portdev->config.max_nr_ports = 1; |
| 1448 | #if 0 /* Multiport is not quite ready yet --RR */ | ||
| 1418 | if (virtio_has_feature(vdev, VIRTIO_CONSOLE_F_MULTIPORT)) { | 1449 | if (virtio_has_feature(vdev, VIRTIO_CONSOLE_F_MULTIPORT)) { |
| 1419 | multiport = true; | 1450 | multiport = true; |
| 1420 | vdev->features[0] |= 1 << VIRTIO_CONSOLE_F_MULTIPORT; | 1451 | vdev->features[0] |= 1 << VIRTIO_CONSOLE_F_MULTIPORT; |
| 1421 | 1452 | ||
| 1422 | vdev->config->get(vdev, offsetof(struct virtio_console_config, | 1453 | vdev->config->get(vdev, |
| 1423 | nr_ports), | 1454 | offsetof(struct virtio_console_multiport_conf, |
| 1455 | nr_ports), | ||
| 1424 | &portdev->config.nr_ports, | 1456 | &portdev->config.nr_ports, |
| 1425 | sizeof(portdev->config.nr_ports)); | 1457 | sizeof(portdev->config.nr_ports)); |
| 1426 | vdev->config->get(vdev, offsetof(struct virtio_console_config, | 1458 | vdev->config->get(vdev, |
| 1427 | max_nr_ports), | 1459 | offsetof(struct virtio_console_multiport_conf, |
| 1460 | max_nr_ports), | ||
| 1428 | &portdev->config.max_nr_ports, | 1461 | &portdev->config.max_nr_ports, |
| 1429 | sizeof(portdev->config.max_nr_ports)); | 1462 | sizeof(portdev->config.max_nr_ports)); |
| 1430 | if (portdev->config.nr_ports > portdev->config.max_nr_ports) { | 1463 | if (portdev->config.nr_ports > portdev->config.max_nr_ports) { |
| @@ -1440,6 +1473,7 @@ static int __devinit virtcons_probe(struct virtio_device *vdev) | |||
| 1440 | 1473 | ||
| 1441 | /* Let the Host know we support multiple ports.*/ | 1474 | /* Let the Host know we support multiple ports.*/ |
| 1442 | vdev->config->finalize_features(vdev); | 1475 | vdev->config->finalize_features(vdev); |
| 1476 | #endif | ||
| 1443 | 1477 | ||
| 1444 | err = init_vqs(portdev); | 1478 | err = init_vqs(portdev); |
| 1445 | if (err < 0) { | 1479 | if (err < 0) { |
| @@ -1522,7 +1556,6 @@ static struct virtio_device_id id_table[] = { | |||
| 1522 | 1556 | ||
| 1523 | static unsigned int features[] = { | 1557 | static unsigned int features[] = { |
| 1524 | VIRTIO_CONSOLE_F_SIZE, | 1558 | VIRTIO_CONSOLE_F_SIZE, |
| 1525 | VIRTIO_CONSOLE_F_MULTIPORT, | ||
| 1526 | }; | 1559 | }; |
| 1527 | 1560 | ||
| 1528 | static struct virtio_driver virtio_console = { | 1561 | static struct virtio_driver virtio_console = { |
diff --git a/include/linux/virtio_console.h b/include/linux/virtio_console.h index ae4f039515b4..92228a8fbcbc 100644 --- a/include/linux/virtio_console.h +++ b/include/linux/virtio_console.h | |||
| @@ -12,37 +12,14 @@ | |||
| 12 | 12 | ||
| 13 | /* Feature bits */ | 13 | /* Feature bits */ |
| 14 | #define VIRTIO_CONSOLE_F_SIZE 0 /* Does host provide console size? */ | 14 | #define VIRTIO_CONSOLE_F_SIZE 0 /* Does host provide console size? */ |
| 15 | #define VIRTIO_CONSOLE_F_MULTIPORT 1 /* Does host provide multiple ports? */ | ||
| 16 | 15 | ||
| 17 | struct virtio_console_config { | 16 | struct virtio_console_config { |
| 18 | /* colums of the screens */ | 17 | /* colums of the screens */ |
| 19 | __u16 cols; | 18 | __u16 cols; |
| 20 | /* rows of the screens */ | 19 | /* rows of the screens */ |
| 21 | __u16 rows; | 20 | __u16 rows; |
| 22 | /* max. number of ports this device can hold */ | ||
| 23 | __u32 max_nr_ports; | ||
| 24 | /* number of ports added so far */ | ||
| 25 | __u32 nr_ports; | ||
| 26 | } __attribute__((packed)); | 21 | } __attribute__((packed)); |
| 27 | 22 | ||
| 28 | /* | ||
| 29 | * A message that's passed between the Host and the Guest for a | ||
| 30 | * particular port. | ||
| 31 | */ | ||
| 32 | struct virtio_console_control { | ||
| 33 | __u32 id; /* Port number */ | ||
| 34 | __u16 event; /* The kind of control event (see below) */ | ||
| 35 | __u16 value; /* Extra information for the key */ | ||
| 36 | }; | ||
| 37 | |||
| 38 | /* Some events for control messages */ | ||
| 39 | #define VIRTIO_CONSOLE_PORT_READY 0 | ||
| 40 | #define VIRTIO_CONSOLE_CONSOLE_PORT 1 | ||
| 41 | #define VIRTIO_CONSOLE_RESIZE 2 | ||
| 42 | #define VIRTIO_CONSOLE_PORT_OPEN 3 | ||
| 43 | #define VIRTIO_CONSOLE_PORT_NAME 4 | ||
| 44 | #define VIRTIO_CONSOLE_PORT_REMOVE 5 | ||
| 45 | |||
| 46 | #ifdef __KERNEL__ | 23 | #ifdef __KERNEL__ |
| 47 | int __init virtio_cons_early_init(int (*put_chars)(u32, const char *, int)); | 24 | int __init virtio_cons_early_init(int (*put_chars)(u32, const char *, int)); |
| 48 | #endif /* __KERNEL__ */ | 25 | #endif /* __KERNEL__ */ |
