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path: root/drivers/char/hvc_console.h
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* tty: move hvc drivers to drivers/tty/hvc/Greg Kroah-Hartman2011-01-131-119/+0
| | | | | | | | | | As requested by Arnd Bergmann, the hvc drivers are now moved to the drivers/tty/hvc/ directory. The virtio_console.c driver was also moved, as it required the hvc_console.h file to be able to be built, and it really is a hvc driver. Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* hvc_console: Remove __devinit annotation from hvc_allocAmit Shah2010-02-031-2/+2
| | | | | | | | | | | | Virtio consoles can be hotplugged, so hvc_alloc gets called from multiple sites: from the initial probe() routine as well as later on from workqueue handlers which aren't __devinit code. So, drop the __devinit annotation for hvc_alloc. Signed-off-by: Amit Shah <amit.shah@redhat.com> Cc: linuxppc-dev@ozlabs.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* hvc_console: Make the ops pointer const.Rusty Russell2010-02-031-3/+4
| | | | | | | | | | | 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 Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* hvc_console: Provide (un)locked version for hvc_resize()Hendrik Brueckner2009-09-241-1/+11
| | | | | | | | | | | | | | | | | | Rename the locking free hvc_resize() function to __hvc_resize() and provide an inline function that locks the hvc_struct and calls __hvc_resize(). The rationale for this patch is that virtio_console calls the hvc_resize() function without locking the hvc_struct. So it needs to call the lock itself. According to naming rules, the unlocked version is renamed and prefixed with "__". References to unlocked function calls in hvc back-ends has been updated. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Make open count variables signed in hvcs/hvsi/hvc_consoleroel kluin2008-12-031-1/+1
| | | | | | | Otherwise the tests for count < 0 will never be true. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* hvc_console: Remove __devexit annotation of hvc_remove()Hendrik Brueckner2008-10-221-1/+1
| | | | | | | | | | Removed __devexit annotation of hvc_remove() to avoid a section mismatch if the backend initialization fails and hvc_remove() must be used to clean up allocated hvc structs (called in section __init or __devinit). 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>
* hvc_console: Add support for tty window resizingHendrik Brueckner2008-10-221-0/+6
| | | | | | | | | | | | | | | | | The patch provides the hvc_resize() function to update the terminal window dimensions (struct winsize) for a specified hvc console. The function stores the new window size and schedules a function that finally updates the tty winsize and signals the change to user space (SIGWINCH). Because the winsize update must acquire a mutex and might sleep, the function is scheduled instead of being called from hvc_poll() or khvcd. This patch uses the tty_do_resize() routine from the tty layer. A pending resize work is canceled in hvc_close() and hvc_hangup(). Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* hvc_console: Add a hangup notifier for backendsHendrik Brueckner2008-10-221-1/+3
| | | | | | | | | | 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>
* powerpc: Move include files to arch/powerpc/include/asmStephen Rothwell2008-08-041-1/+1
| | | | | | | | | | | | | | from include/asm-powerpc. This is the result of a mkdir arch/powerpc/include/asm git mv include/asm-powerpc/* arch/powerpc/include/asm Followed by a few documentation/comment fixups and a couple of places where <asm-powepc/...> was being used explicitly. Of the latter only one was outside the arch code and it is a driver only built for powerpc. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* hvc_console: rework setup to replace irq functions with callbacksChristian Borntraeger2008-07-251-4/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch tries to change hvc_console to not use request_irq/free_irq if the backend does not use irqs. This allows virtio_console to use hvc_console without having a linker reference to request_irq/free_irq. In addition, together with patch 2/3 it improves the performance for virtio console input. (an earlier version of this patch was tested by Yajin on lguest) The irq specific code is moved to hvc_irq.c and selected by the drivers that use irqs (System p, System i, XEN). I replaced "int irq" with the opaque "int data". The request_irq and free_irq calls are replaced with notifier_add and notifier_del. I have also changed the code a bit to call the notifier_add and notifier_del inside the spinlock area as the callbacks are found via hp->ops. Changes since last version: o remove ifdef o reintroduce "irq_requested" as "notified" o cleanups, sparse.. I did not move the timer based polling into a separate polling scheme. I played with several variants, but it seems we need to sleep/schedule in a thread even for irq based consoles, as there are throttleing and buffer size constraints. I also kept hvc_struct defined in hvc_console.h so that hvc_irq.c can access the irq_requested element. Feedback is appreciated. virtio_console is currently the only available console for kvm on s390. I plan to push this change as soon as all affected parties agree on it. I would love to get test results from System p, Xen etc. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* [POWERPC] Make cpus_in_xmon static and remove extern mess from hvc_console.cMichael Ellerman2008-05-141-0/+10
| | | | | | | | | This is a little messier than I'd like because xmon.h only exists on powerpc and we can't have a static inline and an extern declaration visible at the same time. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Make the hvc_console output buffer size settableStephen Rothwell2006-07-131-1/+1
| | | | | | | | So the iSeries console will be faster since it can send up to 200 bytes at a time to the Hypervisor. This only affects the tty part of the console, the console writes are still in 16 byte lots. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
* [PATCH] powerpc: hvc_console updatesRyan S. Arnold2006-03-281-0/+63
These are some updates from both Ryan and Arnd for the hvc_console driver: The main point is to enable the inclusion of a console driver for rtas, which is currrently needed for the cell platform. Also shuffle around some data-type declarations and moves some functions out of include/asm-ppc64/hvconsole.h and into a new drivers/char/hvc_console.h file. Signed-off-by: "Ryan S. Arnold" <rsa@us.ibm.com> Signed-off-by: Arnd Bergmann <abergman@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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