linux-toradex.git/drivers/s390/cio/css.c, branch v3.2.68

[S390] hibernate: directly trigger subchannel evaluation

2011-12-01T12:32:17+00:00

Using the generic css_schedule_eval to evaluate subchannels
while resuming from hibernation is very slow when used with
many devices. Provide a new evaluation trigger which exploits
css_sched_sch_todo and use this in the resume callback for
ccw devices.

Signed-off-by: Sebastian Ott 
Signed-off-by: Martin Schwidefsky

PM: Improve error code of pm_notifier_call_chain()

2011-07-15T21:58:20+00:00

This enables pm_notifier_call_chain() to get the actual error code
in the callback rather than always assume -EINVAL by converting all
PM notifier calls to return encapsulate error code with
notifier_from_errno().

Signed-off-by: Akinobu Mita 
Signed-off-by: Rafael J. Wysocki

[S390] css_bus_type: make it static

2011-03-15T16:08:24+00:00

Make css_bus_type static. Subchannel drivers have to
use css_driver_register.

Signed-off-by: Sebastian Ott 
Signed-off-by: Martin Schwidefsky

[S390] css_driver: remove duplicate members

2011-03-15T16:08:24+00:00

Remove the owner and name members of struct
css_driver and convert all drivers to store
this data in the embedded struct device_driver.

Signed-off-by: Sebastian Ott 
Signed-off-by: Martin Schwidefsky

[S390] css: update subchannel descriptor

2011-01-05T11:47:29+00:00

Update the subchannel descriptor if we receive a
"Installed parameters modified" crw.

Signed-off-by: Sebastian Ott 
Signed-off-by: Martin Schwidefsky

[S390] css: fix rsid evaluation for 2nd crw

2010-12-01T09:08:17+00:00

Use correct bit positions of rsid field.

Signed-off-by: Sebastian Ott 
Signed-off-by: Martin Schwidefsky

[S390] css: update subchannel description after hibernate

2010-10-25T14:10:18+00:00

Update the subchannel descriptor while resuming from hibernate
in order to obtain current link addresses.

Signed-off-by: Sebastian Ott 
Signed-off-by: Martin Schwidefsky

[S390] css: update descriptor after hibernate

2010-10-25T14:10:18+00:00

Update the channel path descriptors after hibernation.
This is done unlocked, since we are the only active
task at this time.

Note: chsc_determine_base_channel_path_desc is changed
to use spin_lock_irqsave, since it's called with
interrupts disabled in this case.

Signed-off-by: Sebastian Ott 
Signed-off-by: Martin Schwidefsky

[S390] chsc: consolidate memory allocations

2010-10-25T14:10:18+00:00

Most wrappers around the channel subsystem call have their own logic
to allocate memory (with proper alignment) or use preallocated or
static memory. This patch converts most users of the channel
subsystem call to use the same preallocated page (proteced by a
spinlock).

Note: The sei_page which is used in our crw handler to call
"store event information" has to coexist, since
a) in crw context, while accessing the sei_page, sleeping is allowed
   (which will conflict with the spinlock protection of the chsc_page)
b) in crw context, while accessing the sei_page, channel subsystem
   calls are allowed (which itself would require the page).

Signed-off-by: Sebastian Ott 
Signed-off-by: Martin Schwidefsky

[S390] chsc: initialization fixes

2010-10-25T14:10:18+00:00

This patch fixes:
 * kfree vs. free_page usage
 * structure definition for determine_css_characteristics
 * naming convention for the chsc init function
 * deregistration of crw handlers in the cleanup path

Signed-off-by: Sebastian Ott 
Signed-off-by: Martin Schwidefsky