From 1f8051876a194d7f7fe7834d9853f240d6b4b9ab Mon Sep 17 00:00:00 2001 From: Sjur Brændeland Date: Tue, 22 Jan 2013 09:51:20 +1030 Subject: virtio_console: Let unconnected rproc device receive data. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Allow rproc serial ports to receive data before the port is connected. Rproc serial ports usually talk to very simple remote devices with no control queue managing open/close events. So we must let remote devices write to the virtio ring even if the device is not yet fully initialized. Signed-off-by: Sjur Brændeland Signed-off-by: Rusty Russell --- drivers/char/virtio_console.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'drivers/char') diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 684b0d53764f..95cae778bd73 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -1763,8 +1763,11 @@ static void in_intr(struct virtqueue *vq) * tty is spawned) and the host sends out data to console * ports. For generic serial ports, the host won't * (shouldn't) send data till the guest is connected. + * However a remote device might send data before the port is + * connected. So don't remove data from a rproc_serial device. */ - if (!port->guest_connected) + + if (!port->guest_connected && !is_rproc_serial(port->portdev->vdev)) discard_port_data(port); spin_unlock_irqrestore(&port->inbuf_lock, flags); -- cgit v1.2.3 From dc18f0800f5f16460030a9623d4fcc165d607edf Mon Sep 17 00:00:00 2001 From: Sjur Brændeland Date: Tue, 12 Feb 2013 16:24:59 +1030 Subject: virtio_console: Use virtio device index to generate port name MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Use virtio device index for creating unique device port names. Current index allocation in virtio is based on a monotonically increasing variable "index". A better handling of this is to use device index which is allocated by ida. Signed-off-by: Sjur Brændeland Signed-off-by: Rusty Russell --- drivers/char/virtio_console.c | 16 +++------------- 1 file changed, 3 insertions(+), 13 deletions(-) (limited to 'drivers/char') diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 95cae778bd73..2cfd5a0575ab 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -61,9 +61,6 @@ struct ports_driver_data { /* List of all the devices we're handling */ struct list_head portdevs; - /* Number of devices this driver is handling */ - unsigned int index; - /* * This is used to keep track of the number of hvc consoles * spawned by this driver. This number is given as the first @@ -169,9 +166,6 @@ struct ports_device { /* Array of per-port IO virtqueues */ struct virtqueue **in_vqs, **out_vqs; - /* Used for numbering devices for sysfs and debugfs */ - unsigned int drv_index; - /* Major number for this device. Ports will be created as minors. */ int chr_major; }; @@ -1415,7 +1409,7 @@ static int add_port(struct ports_device *portdev, u32 id) } port->dev = device_create(pdrvdata.class, &port->portdev->vdev->dev, devt, port, "vport%up%u", - port->portdev->drv_index, id); + port->portdev->vdev->index, id); if (IS_ERR(port->dev)) { err = PTR_ERR(port->dev); dev_err(&port->portdev->vdev->dev, @@ -1470,7 +1464,7 @@ static int add_port(struct ports_device *portdev, u32 id) * inspect a port's state at any time */ sprintf(debugfs_name, "vport%up%u", - port->portdev->drv_index, id); + port->portdev->vdev->index, id); port->debugfs_file = debugfs_create_file(debugfs_name, 0444, pdrvdata.debugfs_dir, port, @@ -1961,16 +1955,12 @@ static int virtcons_probe(struct virtio_device *vdev) portdev->vdev = vdev; vdev->priv = portdev; - spin_lock_irq(&pdrvdata_lock); - portdev->drv_index = pdrvdata.index++; - spin_unlock_irq(&pdrvdata_lock); - portdev->chr_major = register_chrdev(0, "virtio-portsdev", &portdev_fops); if (portdev->chr_major < 0) { dev_err(&vdev->dev, "Error %d registering chrdev for device %u\n", - portdev->chr_major, portdev->drv_index); + portdev->chr_major, vdev->index); err = portdev->chr_major; goto free; } -- cgit v1.2.3 From b2a17029c29bb6f7dec580feffa715b9fcf51e42 Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Wed, 13 Feb 2013 16:59:28 +1030 Subject: virtio: use module_virtio_driver. Signed-off-by: Rusty Russell --- drivers/char/hw_random/virtio-rng.c | 13 +------------ drivers/net/virtio_net.c | 12 +----------- drivers/virtio/virtio_balloon.c | 13 +------------ 3 files changed, 3 insertions(+), 35 deletions(-) (limited to 'drivers/char') diff --git a/drivers/char/hw_random/virtio-rng.c b/drivers/char/hw_random/virtio-rng.c index b65c10395959..10fd71ccf587 100644 --- a/drivers/char/hw_random/virtio-rng.c +++ b/drivers/char/hw_random/virtio-rng.c @@ -154,18 +154,7 @@ static struct virtio_driver virtio_rng_driver = { #endif }; -static int __init init(void) -{ - return register_virtio_driver(&virtio_rng_driver); -} - -static void __exit fini(void) -{ - unregister_virtio_driver(&virtio_rng_driver); -} -module_init(init); -module_exit(fini); - +module_virtio_driver(virtio_rng_driver); MODULE_DEVICE_TABLE(virtio, id_table); MODULE_DESCRIPTION("Virtio random number driver"); MODULE_LICENSE("GPL"); diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index a6fcf15adc4f..80fb683d9d3a 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -1645,17 +1645,7 @@ static struct virtio_driver virtio_net_driver = { #endif }; -static int __init init(void) -{ - return register_virtio_driver(&virtio_net_driver); -} - -static void __exit fini(void) -{ - unregister_virtio_driver(&virtio_net_driver); -} -module_init(init); -module_exit(fini); +module_virtio_driver(virtio_net_driver); MODULE_DEVICE_TABLE(virtio, id_table); MODULE_DESCRIPTION("Virtio network driver"); diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 797e1c79a104..8dab163c5ef0 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -560,18 +560,7 @@ static struct virtio_driver virtio_balloon_driver = { #endif }; -static int __init init(void) -{ - return register_virtio_driver(&virtio_balloon_driver); -} - -static void __exit fini(void) -{ - unregister_virtio_driver(&virtio_balloon_driver); -} -module_init(init); -module_exit(fini); - +module_virtio_driver(virtio_balloon_driver); MODULE_DEVICE_TABLE(virtio, id_table); MODULE_DESCRIPTION("Virtio balloon driver"); MODULE_LICENSE("GPL"); -- cgit v1.2.3 From 8078db789a92b10ff6e2d713231b5367e014c53b Mon Sep 17 00:00:00 2001 From: Sjur Brændeland Date: Wed, 13 Feb 2013 20:57:21 +1030 Subject: virtio_console: Initialize guest_connected=true for rproc_serial MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit When rproc_serial is initialized, guest_connected should be set to true. We can then revert the extra checks introduced in commit: "virtio_console: Let unconnected rproc device receive data." Signed-off-by: Sjur Brændeland Signed-off-by: Rusty Russell --- drivers/char/virtio_console.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) (limited to 'drivers/char') diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 2cfd5a0575ab..5afc8f614b1c 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -1436,7 +1436,7 @@ static int add_port(struct ports_device *portdev, u32 id) * rproc_serial does not want the console port, only * the generic port implementation. */ - port->host_connected = true; + port->host_connected = port->guest_connected = true; else if (!use_multiport(port->portdev)) { /* * If we're not using multiport support, @@ -1757,11 +1757,8 @@ static void in_intr(struct virtqueue *vq) * tty is spawned) and the host sends out data to console * ports. For generic serial ports, the host won't * (shouldn't) send data till the guest is connected. - * However a remote device might send data before the port is - * connected. So don't remove data from a rproc_serial device. */ - - if (!port->guest_connected && !is_rproc_serial(port->portdev->vdev)) + if (!port->guest_connected) discard_port_data(port); spin_unlock_irqrestore(&port->inbuf_lock, flags); -- cgit v1.2.3