linux-toradex.git/drivers/s390/cio/qdio.h, branch v4.1

s390: remove 31 bit support

2015-03-25T10:49:33+00:00

Remove the 31 bit support in order to reduce maintenance cost and
effectively remove dead code. Since a couple of years there is no
distribution left that comes with a 31 bit kernel.

The 31 bit kernel also has been broken since more than a year before
anybody noticed. In addition I added a removal warning to the kernel
shown at ipl for 5 minutes: a960062e5826 ("s390: add 31 bit warning
message") which let everybody know about the plan to remove 31 bit
code. We didn't get any response.

Given that the last 31 bit only machine was introduced in 1999 let's
remove the code.
Anybody with 31 bit user space code can still use the compat mode.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/qdio: for_each macro correctness

2014-01-29T08:07:50+00:00

I observed that there are for_each macros that do an extra memory access
beyond the defined area.
Normally this does not cause problems.
But, this can cause exceptions. For example: if the area is allocated at
the end of a page and the next page is not accessible.

For correctness, I suggest changing the arguments of the 'for loop' like
others 'for_each' do in the kernel.

Signed-off-by: Jose Alonso 
Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/qdio: cleanup chsc SADC usage

2013-06-26T19:10:15+00:00

Move the code to issue the set adapter device controls command to
chsc.c and make it accessible for the qdio code via the wrapper
chsc_sadc.

Reviewed-by: Ursula Braun 
Signed-off-by: Sebastian Ott 
Signed-off-by: Martin Schwidefsky

s390/qdio: cleanup chsc SSQD usage

2013-06-26T19:10:14+00:00

Cleanup the function qdio_setup_get_ssqd. Fix some possible
memleaks and an unchecked allocation and create a wrapper
for SSQD in chsc.c .

Reviewed-by: Ursula Braun 
Signed-off-by: Sebastian Ott 
Signed-off-by: Martin Schwidefsky

s390/comments: unify copyright messages and remove file names

2012-07-20T09:15:04+00:00

Remove the file name from the comment at top of many files. In most
cases the file name was wrong anyway, so it's rather pointless.

Also unify the IBM copyright statement. We did have a lot of sightly
different statements and wanted to change them one after another
whenever a file gets touched. However that never happened. Instead
people start to take the old/"wrong" statements to use as a template
for new files.
So unify all of them in one go.

Signed-off-by: Heiko Carstens

[S390] qdio: prevent dsci access without adapter interrupts

2011-10-30T14:16:47+00:00

A kernel panic may occur during sending or receiving network packets
on a machine without adapter interrupts since commit d36deae.
The bug is triggered by writing to the shared indicator address which
is set to 0 if the machine doesn't have adapter interrupts.

Make the reading and setting of the shared indicator dependent on the
adapter interrupt feature and while at it move the code to the
file containing the adapter interrupt related code.

Thanks to Jan Jaeger for tracking this down.

Reported-by: Jan Jaeger 
Tested-by: Jan Jaeger 
Signed-off-by: Jan Glauber 
Signed-off-by: Martin Schwidefsky

[S390] qdio: remove multicast polling

2011-10-30T14:16:45+00:00

The multicast poll check for the outbound queue is redundant since
3d6c76f "[S390] qdio: outbound tasklet scan threshold". Remove the check.

Signed-off-by: Jan Glauber 
Signed-off-by: Martin Schwidefsky

[S390] qdio: add timestamp for last queue scan time

2011-10-30T14:16:45+00:00

Add a timestamp per queue and update the timestamp when the queue is
scanned. Add the queue timestamps and the timestamp of the last
adapter interrupt to the debugfs output. The timestamps are useful
for debugging stall conditions.

Signed-off-by: Jan Glauber 
Signed-off-by: Martin Schwidefsky

qdio: support forced signal adapter indications

2011-08-13T08:10:16+00:00

This patch ensures that signal adapter commands are issued if they are
indicated to be required.

Signed-off-by: Einar Lueck 
Signed-off-by: Jan Glauber 
Signed-off-by: Frank Blaschka 
Signed-off-by: David S. Miller

qdio: support asynchronous delivery of storage blocks

2011-08-13T08:10:16+00:00

This patch introduces support for asynchronous delivery of storage blocks for
Hipersockets. Upper layers may exploit this functionality to reuse SBALs for
which the delivery status is still pending.

Signed-off-by: Einar Lueck 
Signed-off-by: Jan Glauber 
Signed-off-by: Frank Blaschka 
Signed-off-by: David S. Miller