linux-toradex.git/drivers/s390/cio/device_fsm.c, branch v6.3

s390/cio: sort out physical vs virtual pointers usage

2022-12-01T09:58:04+00:00

This does not fix a real bug, since virtual addresses
are currently indentical to physical ones.

Use virt_to_phys() for intparm interrupt parameter to
convert a 64-bit virtual address to the 32-bit physical
address, which is expected to be below 2GB.

Reviewed-by: Peter Oberparleiter 
Signed-off-by: Alexander Gordeev

s390: cleanup timer API use

2022-03-27T20:18:39+00:00

cleanup the s390's use of the timer API
- del_timer() contains timer_pending() condition
- mod_timer(timer, expires) is equivalent to:

	del_timer(timer);
	timer->expires = expires;
	add_timer(timer);

If the timer is inactive it will be activated, using add_timer() on
condition !timer_pending(&private->timer) is redundant.

Just cleanup, no logic change.

Signed-off-by: Yu Liao 
Link: https://lore.kernel.org/r/20220322030057.1243196-1-liaoyu15@huawei.com
Signed-off-by: Heiko Carstens 
Signed-off-by: Vasily Gorbik

s390/time,idle: get rid of unsigned long long

2021-03-08T09:46:27+00:00

Get rid of unsigned long long, and use unsigned long instead
everywhere. The usage of unsigned long long is a leftover from
31 bit kernel support.

Signed-off-by: Heiko Carstens

s390/cio: remove pm support from ccw bus driver

2020-12-02T17:19:25+00:00

As part of removing broken pm-support from s390 arch, remove
the pm callbacks from ccw-bus driver.The power-management functions
are unused since the 'commit 394216275c7d ("s390: remove broken
hibernate / power management support")'.

Signed-off-by: Vineeth Vijayan 
Reviewed-by: Peter Oberparleiter 
Signed-off-by: Heiko Carstens

s390/cio: add basic protected virtualization support

2019-06-15T10:25:00+00:00

As virtio-ccw devices are channel devices, we need to use the
dma area within the common I/O layer for any communication with
the hypervisor.

Note that we do not need to use that area for control blocks
directly referenced by instructions, e.g. the orb.

It handles neither QDIO in the common code, nor any device type specific
stuff (like channel programs constructed by the DASD driver).

An interesting side effect is that virtio structures are now going to
get allocated in 31 bit addressable storage.

Signed-off-by: Halil Pasic 
Reviewed-by: Sebastian Ott 
Reviewed-by: Cornelia Huck 
Reviewed-by: Michael Mueller 
Tested-by: Michael Mueller 
Signed-off-by: Heiko Carstens

s390/cio: clear timer when terminating driver I/O

2018-02-22T09:09:27+00:00

When we terminate driver I/O (because we need to stop using a certain
channel path) we also need to ensure that a timer (which may have been
set up using ccw_device_start_timeout) is cleared.

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

s390/cio: fix return code after missing interrupt

2018-02-22T09:09:25+00:00

When a timeout occurs for users of ccw_device_start_timeout
we will stop the IO and call the drivers int handler with
the irb pointer set to ERR_PTR(-ETIMEDOUT). Sometimes
however we'd set the irb pointer to ERR_PTR(-EIO) which is
not intended. Just set the correct value in all codepaths.

Reported-by: Julian Wiedmann 
Signed-off-by: Sebastian Ott 
Signed-off-by: Martin Schwidefsky

s390: cio: add SPDX identifiers to the remaining files

2017-11-24T13:28:41+00:00

It's good to have SPDX identifiers in all files to make it easier to
audit the kernel tree for correct licenses.

Update the drivers/s390/cio/ files with the correct SPDX license
identifier based on the license text in the file itself.  The SPDX
identifier is a legally binding shorthand, which can be used instead of
the full boiler plate text.

This work is based on a script and data from Thomas Gleixner, Philippe
Ombredanne, and Kate Stewart.

Cc: Sebastian Ott 
Cc: Peter Oberparleiter 
Cc: Martin Schwidefsky 
Cc: Heiko Carstens 
Cc: Cornelia Huck 
Cc: Dong Jia Shi 
Cc: Thomas Gleixner 
Cc: Kate Stewart 
Cc: Philippe Ombredanne 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/cio: Convert timers to use timer_setup()

2017-11-14T10:01:36+00:00

In preparation for unconditionally passing the struct timer_list
pointer to all timer callbacks, switch to using the new timer_setup()
and from_timer() to pass the timer pointer explicitly.

Cc: Sebastian Ott 
Cc: Peter Oberparleiter 
Signed-off-by: Kees Cook 
Signed-off-by: Martin Schwidefsky 
Signed-off-by: Heiko Carstens

s390/cio: recover from bad paths

2017-09-19T06:36:19+00:00

In some situations we don't receive notification from firmware that
a previously unusable channelpath is usable again.

Schedule recovery for devices that return from path verification
without using all potentially usable paths. The recovery thread will
periodically trigger a path verification on the affected devices.

Signed-off-by: Sebastian Ott 
Suggested-by: Peter Oberparleiter 
Reviewed-by: Peter Oberparleiter 
Signed-off-by: Martin Schwidefsky