diff options
| -rw-r--r-- | drivers/char/virtio_console.c | 67 |
1 files changed, 46 insertions, 21 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 6bbf707f9e3..82f5180d4a3 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -32,6 +32,18 @@ * across multiple devices and multiple ports per device. */ struct ports_driver_data { + /* + * This is used to keep track of the number of hvc consoles + * spawned by this driver. This number is given as the first + * argument to hvc_alloc(). To correctly map an initial + * console spawned via hvc_instantiate to the console being + * hooked up via hvc_alloc, we need to pass the same vtermno. + * + * We also just assume the first console being initialised was + * the first one that got used as the initial console. + */ + unsigned int next_vtermno; + /* All the console devices handled by this driver */ struct list_head consoles; }; @@ -69,9 +81,6 @@ struct port { u32 vtermno; }; -/* We have one port ready to go immediately, for a console. */ -static struct port console; - /* This is the very early arch-specified put chars function. */ static int (*early_put_chars)(u32, const char *, int); @@ -299,6 +308,30 @@ int __init virtio_cons_early_init(int (*put_chars)(u32, const char *, int)) return hvc_instantiate(0, 0, &hv_ops); } +static struct port *__devinit add_port(u32 vtermno) +{ + struct port *port; + + port = kmalloc(sizeof(*port), GFP_KERNEL); + if (!port) + return NULL; + + port->inbuf = alloc_buf(PAGE_SIZE); + if (!port->inbuf) { + kfree(port); + return NULL; + } + port->hvc = NULL; + port->vtermno = vtermno; + return port; +} + +static void free_port(struct port *port) +{ + free_buf(port->inbuf); + kfree(port); +} + /* * Once we're further in boot, we get probed like any other virtio * device. At this stage we set up the output virtqueue. @@ -318,24 +351,16 @@ static int __devinit virtcons_probe(struct virtio_device *vdev) struct port *port; int err; - port = &console; - if (port->vdev) { - dev_warn(&port->vdev->dev, - "Multiple virtio-console devices not supported yet\n"); - return -EEXIST; + port = add_port(pdrvdata.next_vtermno); + if (!port) { + err = -ENOMEM; + goto fail; } /* Attach this port to this virtio_device, and vice-versa. */ port->vdev = vdev; vdev->priv = port; - /* This is the scratch page we use to receive console input */ - port->inbuf = alloc_buf(PAGE_SIZE); - if (!port->inbuf) { - err = -ENOMEM; - goto fail; - } - /* Find the queues. */ err = vdev->config->find_vqs(vdev, 2, vqs, callbacks, names); if (err) @@ -346,17 +371,16 @@ static int __devinit virtcons_probe(struct virtio_device *vdev) /* * The first argument of hvc_alloc() is the virtual console - * number, so we use zero. The second argument is the - * parameter for the notification mechanism (like irq - * number). We currently leave this as zero, virtqueues have - * implicit notifications. + * number. The second argument is the parameter for the + * notification mechanism (like irq number). We currently + * leave this as zero, virtqueues have implicit notifications. * * The third argument is a "struct hv_ops" containing the * put_chars(), get_chars(), notifier_add() and notifier_del() * pointers. The final argument is the output buffer size: we * can do any size, so we put PAGE_SIZE here. */ - port->hvc = hvc_alloc(0, 0, &hv_ops, PAGE_SIZE); + port->hvc = hvc_alloc(port->vtermno, 0, &hv_ops, PAGE_SIZE); if (IS_ERR(port->hvc)) { err = PTR_ERR(port->hvc); goto free_vqs; @@ -364,6 +388,7 @@ static int __devinit virtcons_probe(struct virtio_device *vdev) /* Add to vtermno list. */ spin_lock_irq(&pdrvdata_lock); + pdrvdata.next_vtermno++; list_add(&port->list, &pdrvdata.consoles); spin_unlock_irq(&pdrvdata_lock); @@ -377,7 +402,7 @@ static int __devinit virtcons_probe(struct virtio_device *vdev) free_vqs: vdev->config->del_vqs(vdev); free: - free_buf(port->inbuf); + free_port(port); fail: return err; } |