diff options
| author | Michael Holzheu <holzheu@de.ibm.com> | 2009-06-16 10:30:40 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-06-16 10:31:16 +0200 |
| commit | 62b7494209495847269a6ce0504cbefd23d42eb1 (patch) | |
| tree | 6318661837ddd250dc86b48a94f44fa2d1ae9421 /drivers/s390/char/sclp_rw.h | |
| parent | 3ef32e62cb55785f6f1b5ad7290744f74bdadaf0 (diff) | |
[S390] pm: power management support for SCLP drivers.
The SCLP base driver defines a new notifier call back for all upper level SCLP
drivers, like the SCLP console, etc. This guarantees that in suspend first the
upper level drivers are suspended and afterwards the SCLP base driver. For
resume it is the other way round. The SCLP base driver itself registers a
new platform device at the platform bus and gets PM notifications via
the dev_pm_ops.
In suspend, the SCLP base driver switches off the receiver and sender mask
This is done in sclp_deactivate(). After suspend all new requests will be
rejected with -EIO and no more interrupts will be received, because the masks
are switched off. For resume the sender and receiver masks are reset in
the sclp_reactivate() function.
When the SCLP console is suspended, all new messages are cached in the
sclp console buffers. In resume, all the cached messages are written to the
console. In addition to that we have an early resume function that removes
the cached messages from the suspend image.
Signed-off-by: Michael Holzheu <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/char/sclp_rw.h')
| -rw-r--r-- | drivers/s390/char/sclp_rw.h | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/s390/char/sclp_rw.h b/drivers/s390/char/sclp_rw.h index 6aa7a6948bc9..85f491ea929c 100644 --- a/drivers/s390/char/sclp_rw.h +++ b/drivers/s390/char/sclp_rw.h @@ -1,11 +1,10 @@ /* - * drivers/s390/char/sclp_rw.h - * interface to the SCLP-read/write driver + * interface to the SCLP-read/write driver * - * S390 version - * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation - * Author(s): Martin Peschke <mpeschke@de.ibm.com> - * Martin Schwidefsky <schwidefsky@de.ibm.com> + * Copyright IBM Corporation 1999, 2009 + * + * Author(s): Martin Peschke <mpeschke@de.ibm.com> + * Martin Schwidefsky <schwidefsky@de.ibm.com> */ #ifndef __SCLP_RW_H__ @@ -93,4 +92,5 @@ void sclp_set_columns(struct sclp_buffer *, unsigned short); void sclp_set_htab(struct sclp_buffer *, unsigned short); int sclp_chars_in_buffer(struct sclp_buffer *); +void sclp_console_pm_event(enum sclp_pm_event sclp_pm_event); #endif /* __SCLP_RW_H__ */ |