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path: root/drivers/char/virtio_console.c (follow)
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2010-02-24virtio: console: use vdev->priv to avoid accessing global var.Rusty Russell1-2/+8
Part of removing our "one console" assumptions, use vdev->priv to point to the port (currently == the global console). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: introduce a get_inbuf helper to fetch bufs from in_vqAmit Shah1-4/+17
This makes taking locks around the get_buf vq operation easier, as well as complements the add_inbuf() operation. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: ensure add_inbuf can work for multiple ports as wellAmit Shah1-17/+18
add_inbuf() assumed one port and one inbuf per port. Remove that assumption. Also move the function so that put_chars and get_chars are together. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: encapsulate buffer information in a structAmit Shah1-15/+55
Collect port buffer, used_len, offset fields into a single structure. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: port encapsulationRusty Russell1-49/+58
We are heading towards a multiple-"port" system, so as part of weaning off globals we encapsulate the information into 'struct port'. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: We support only one device at a timeAmit Shah1-0/+5
We support only one virtio_console device at a time. If multiple are found, error out if one is already initialized. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24hvc_console: make the ops pointer const.Rusty Russell1-1/+1
This is nicer for modern R/O protection. And noone needs it non-const, so constify the callers as well. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Amit Shah <amit.shah@redhat.com> To: Christian Borntraeger <borntraeger@de.ibm.com> Cc: linuxppc-dev@ozlabs.org
2010-02-24virtio: console: statically initialize virtio_consRusty Russell1-26/+34
That way, we can make it const as is good kernel style. We use a separate indirection for the early console, rather than mugging ops.put_chars. We rename it hv_ops, too. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-02-24virtio: console: comment cleanupRusty Russell1-54/+54
Remove old lguest-style comments. [Amit: - wingify comments acc. to kernel style - indent comments ] Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2009-10-22virtio: let header files include virtio_ids.hChristian Borntraeger1-1/+0
Rusty, commit 3ca4f5ca73057a617f9444a91022d7127041970a virtio: add virtio IDs file moved all device IDs into a single file. While the change itself is a very good one, it can break userspace applications. For example if a userspace tool wanted to get the ID of virtio_net it used to include virtio_net.h. This does no longer work, since virtio_net.h does not include virtio_ids.h. This patch moves all "#include <linux/virtio_ids.h>" from the C files into the header files, making the header files compatible with the old ones. In addition, this patch exports virtio_ids.h to userspace. CC: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2009-09-23virtio: add virtio IDs fileFernando Luis Vazquez Cao1-0/+1
Virtio IDs are spread all over the tree which makes assigning new IDs bothersome. Putting them together should make the process less error-prone. Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2009-09-23virtio: make add_buf return capacity remainingRusty Russell1-2/+2
This API change means that virtio_net can tell how much capacity remains for buffers. It's necessarily fuzzy, since VIRTIO_RING_F_INDIRECT_DESC means we can fit any number of descriptors in one, *if* we can kmalloc. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Dinesh Subhraveti <dineshs@us.ibm.com>
2009-06-12virtio: find_vqs/del_vqs virtio operationsMichael S. Tsirkin1-15/+11
This replaces find_vq/del_vq with find_vqs/del_vqs virtio operations, and updates all drivers. This is needed for MSI support, because MSI needs to know the total number of vectors upfront. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (+ lguest/9p compile fixes)
2009-06-12virtio: add names to virtqueue struct, mapping from devices to queues.Rusty Russell1-2/+2
Add a linked list of all virtqueues for a virtio device: this helps for debugging and is also needed for upcoming interface change. Also, add a "name" field for clearer debug messages. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2008-12-30virtio_console: support console resizingChristian Borntraeger1-1/+29
this patch uses the new hvc callback hvc_resize to set the window size which allows to change the tty size of hvc_console via a hvc_resize function. I have added a new feature bit VIRTIO_CONSOLE_F_SIZE. The driver will change the window size on tty open and via the config_changed callback of the transport. Currently lguest and kvm_s390 have not implemented this callback, but the callback can be implemented at a later point in time. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2008-10-22hvc_console: Add a hangup notifier for backendsHendrik Brueckner1-0/+1
I have added a hangup notifier that can be used by hvc console backends to handle a tty hangup. The default irq hangup notifier calls the notifier_del_irq() for compatibility. Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2008-07-25virtio_console: use virtqueue notification for hvc_consoleChristian Borntraeger1-7/+33
This patch exploits the new notifier callbacks of the hvc_console. We can use the virtio callbacks instead of the polling code. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2008-02-04virtio: simplify config mechanism.Rusty Russell1-2/+2
Previously we used a type/len pair within the config space, but this seems overkill. We now simply define a structure which represents the layout in the config space: the config space can now only be extended at the end. The main driver-visible changes: 1) We indicate what fields are present with an explicit feature bit. 2) Virtqueues are explicitly numbered, and not in the config space. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2007-11-05virtio/virtcons: fix section mismatch warningRandy Dunlap1-1/+1
Make virtcons_probe() __devinit. Fixes this section warning: WARNING: vmlinux.o(.text+0x14c10b): Section mismatch: reference to .init.text:hvc_alloc (between 'virtcons_probe' and 'ac_register_board') Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-23Virtio console driverRusty Russell1-0/+225
This is an hvc-based virtio console driver. It's suboptimal becuase hvc expects to have raw access to interrupts and virtio doesn't assume that, so it currently polls. There are two solutions: expose hvc's "kick" interface, or wean off hvc. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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