linux-toradex.git/include/linux/virtio_console.h, branch v2.6.38.5

virtio: console: Update Copyright

2011-02-08T21:49:55+00:00

Signed-off-by: Amit Shah 
Signed-off-by: Rusty Russell

virtio: console: Use a control message to add ports

2010-05-19T12:45:49+00:00

Instead of the host and guest independently enumerating ports, switch to
a control message to add ports where the host supplies the port number
so there's no ambiguity or a possibility of a race between the host and
the guest port numbers.

We now no longer need the 'nr_ports' config value. Since no kernel has
been released with the MULTIPORT changes yet, we have a chance to fiddle
with the config space without adding compatibility features.

This is beneficial for management software, which would now be able to
instantiate ports at known locations and avoid problems that arise with
implicit numbering in the host and the guest. This removes the 'guessing
game' part of it, and management software can now actually indicate
which id to spawn a particular port on.

Signed-off-by: Amit Shah 
Signed-off-by: Rusty Russell

virtio: console: Let host know of port or device add failures

2010-05-19T12:45:47+00:00

The host may want to know and let management apps notify of port or
device add failures. Send a control message saying the device or port is
not ready in this case.

Signed-off-by: Amit Shah 
Signed-off-by: Rusty Russell

virtio: Revert "virtio: disable multiport console support."

2010-05-19T12:45:46+00:00

This reverts commit b7a413015d2986edf020fba765c906cc9cbcbfc9.

Multiport support was disabled for 2.6.34 because we wanted to introduce
a new ABI and since we didn't have any released kernel with the older
ABI and were out of the merge window, it didn't make sense keeping the
older ABI around.

Now we revert the patch disabling multiport and rework the ABI in the
following patches.

Signed-off-by: Amit Shah 
Signed-off-by: Rusty Russell

virtio: disable multiport console support.

2010-04-08T00:16:19+00:00

Move MULTIPORT feature and related config changes
out of exported headers, and disable the feature
at runtime.

At this point, it seems less risky to keep code around
until we can enable it than rip it out completely.

Signed-off-by: Michael S. Tsirkin 
Signed-off-by: Rusty Russell

virtio: console: Add ability to hot-unplug ports

2010-02-24T03:53:00+00:00

Remove port data; deregister from the hvc core if it's a console port.

Signed-off-by: Amit Shah 
Signed-off-by: Rusty Russell

virtio: console: Register with sysfs and create a 'name' attribute for ports

2010-02-24T03:52:56+00:00

The host can set a name for ports so that they're easily discoverable
instead of going by the /dev/vportNpn naming. This attribute will be
placed in /sys/class/virtio-ports/vportNpn/name. udev scripts can then
create symlinks to the port using the name.

Signed-off-by: Amit Shah 
Signed-off-by: Rusty Russell

virtio: console: Add file operations to ports for open/read/write/poll

2010-02-24T03:52:54+00:00

Allow guest userspace applications to open, read from, write to, poll
the ports via the char dev interface.

When a port gets opened, a notification is sent to the host via a
control message indicating a connection has been established. Similarly,
on closing of the port, a notification is sent indicating disconnection.

Signed-off-by: Amit Shah 
Signed-off-by: Rusty Russell

virtio: console: Add a new MULTIPORT feature, support for generic ports

2010-02-24T03:52:52+00:00

This commit adds a new feature, MULTIPORT. If the host supports this
feature as well, the config space has the number of ports defined for
that device. New ports are spawned according to this information.

The config space also has the maximum number of ports that can be
spawned for a particular device. This is useful in initializing the
appropriate number of virtqueues in advance, as ports might be
hot-plugged in later.

Using this feature, generic ports can be created which are not tied to
hvc consoles.

We also open up a private channel between the host and the guest via
which some "control" messages are exchanged for the ports, like whether
the port being spawned is a console port, resizing the console window,
etc.

Next commits will add support for hotplugging and presenting char
devices in /dev/ for bi-directional guest-host communication.

Signed-off-by: Amit Shah 
Signed-off-by: Rusty Russell

virtio: console: comment cleanup

2010-02-24T03:52:30+00:00

Remove old lguest-style comments.

[Amit: - wingify comments acc. to kernel style
       - indent comments ]

Signed-off-by: Rusty Russell 
Signed-off-by: Amit Shah 
Signed-off-by: Rusty Russell