27 Jun, 2013
2 commits
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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 -
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
17 Apr, 2013
1 commit
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Collect format 1 channel-path description data for each CHPID
and update the information in one place.Reviewed-by: Sebastian Ott
Signed-off-by: Peter Oberparleiter
Signed-off-by: Martin Schwidefsky
07 Mar, 2013
1 commit
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Let the bus code process scm availability information and
notify scm device drivers about the new state.Reviewed-by: Peter Oberparleiter
Signed-off-by: Sebastian Ott
Signed-off-by: Peter Oberparleiter
Signed-off-by: Martin Schwidefsky
14 Feb, 2013
1 commit
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Cleanup the functions used to call SEI.
Also provide !CONFIG_PCI dummys for pci error handling.Reviewed-by: Peter Oberparleiter
Signed-off-by: Sebastian Ott
Signed-off-by: Martin Schwidefsky
16 Jan, 2013
1 commit
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cbc0dd1 "s390/pci: CHSC PCI support for error and availability events"
introduced a new SEI notification type as part of pci support.
The way SEI was called with nt2 and nt0 consecutive broke the nt0
stuff used for channel subsystem notifications.The reason why this was broken with the mentioned patch is that you
cannot selectively disable type 0 notifications (so even when asked
for type 2 only, type 0 could be presented).The way to do it is to tell SEI which types of notification you can
process and -this is the important part- look at the SEI result which
notification type you actually received.Reviewed-by: Peter Oberparleiter
Tested-by: Michael Holzheu
Signed-off-by: Sebastian Ott
Signed-off-by: Martin Schwidefsky
01 Dec, 2012
1 commit
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Add CHSC store-event-information support for PCI (notfication type 2)
and report error and availability events to the PCI architecture layer.Signed-off-by: Jan Glauber
Signed-off-by: Martin Schwidefsky
26 Sep, 2012
2 commits
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Detect an scm change notification in store event information.
Update affected scm devices and notify their drivers.Signed-off-by: Sebastian Ott
Signed-off-by: Martin Schwidefsky -
chsc_scm_info will be used to detect all available increments of
storage class memory.Signed-off-by: Sebastian Ott
Signed-off-by: Martin Schwidefsky
20 Jul, 2012
1 commit
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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
01 Dec, 2011
1 commit
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The functions called by chsc_chp_vary operate on pointers to channel
path ids not channel path links. (This worked by chance since the id
is the first member of the link structure)Signed-off-by: Sebastian Ott
Signed-off-by: Martin Schwidefsky
23 May, 2011
1 commit
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Update affected channel path descriptors when receiving channel path
availability information.Signed-off-by: Sebastian Ott
Signed-off-by: Martin Schwidefsky
05 Jan, 2011
1 commit
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Add support to accumulate the number of 64K-bytes blocks all paths
to a device at least support for a transport command.Signed-off-by: Sebastian Ott
Signed-off-by: Martin Schwidefsky
25 Oct, 2010
5 commits
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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 -
Update the channel path descriptor at the beginning of to the
vary_on operation.Signed-off-by: Sebastian Ott
Signed-off-by: Martin Schwidefsky -
chsc_determine_channel_path_desc is called by a wrapper
who allocates a response struct. The response data
is then memcpy'ed to this response struct by
chsc_determine_channel_path_desc.Change chsc_determine_base_channel_path_desc to use the
global chsc_page and deliver it to the function doing
the actual chsc call. The channel path desriptor is
then directly read from the response data.As a result we get rid of the additional allocation
for the response struct.Signed-off-by: Sebastian Ott
Signed-off-by: Martin Schwidefsky -
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 -
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 pathSigned-off-by: Sebastian Ott
Signed-off-by: Martin Schwidefsky
10 Aug, 2010
1 commit
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A Linux interface for the CHSC command
store-I/O-operation-status-and-initiate-logging (SIOSL).
Model-dependent logging within the channel subsystem can be invoked
via a helper function or a writable subchannel device attribute.Signed-off-by: Michael Ernst
Signed-off-by: Martin Schwidefsky
19 Jul, 2010
1 commit
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The length filed in the chsc response block (if valid)
has a value of n*(sizeof(chp_desc))+8 (for the response
block header). When we memcopied from the response block
to the actual descriptor we copied 8 bytes too much.
The bug was not revealed since the descriptor is embedded
in struct channel_path.
Since we only write one descriptor at a time ignore the
length value and use sizeof(*desc).Signed-off-by: Sebastian Ott
Signed-off-by: Martin Schwidefsky
22 Apr, 2010
1 commit
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Prepare chsc_enable_facility to be used from outside init functions.
Use static memory for the chsc call and protect its access by a
spinlock (although there is no concurrent usage).Cc:
Signed-off-by: Sebastian Ott
Signed-off-by: Martin Schwidefsky
27 Feb, 2010
1 commit
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Some parts of cio do not shift PAGE_DEFAULT_KEY correctly and end up
with an incorrect key in their data structures.
Since the default key is zero this doesn't really matter. However if
somebody would use key-controlled protection for debugging purposes
it would be quite helpful if all of this would work as expected.Also remove a stale declaration.
Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky
16 Jun, 2009
1 commit
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Signed-off-by: Sebastian Ott
Signed-off-by: Martin Schwidefsky
26 Mar, 2009
2 commits
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In some situations a rc in __chsc_do_secm will be overwritten
by another one. This shouldn't do harm since todays callers
don't check for _specific_ errors but fix it for the sake of
correctness.Signed-off-by: Sebastian Ott
Signed-off-by: Martin Schwidefsky -
Split machine check handler code and move it to cio and kernel code
where it belongs to. No functional change.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky
25 Dec, 2008
1 commit
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Signed-off-by: Michael Ernst
Signed-off-by: Martin Schwidefsky
17 Jul, 2008
1 commit
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Make chsc_error_from_response() available to chsc callers outside
of chsc.c (namely qdio) to avoid duplicating error checking code.Signed-off-by: Cornelia Huck
Signed-off-by: Martin Schwidefsky
Signed-off-by: Heiko Carstens
14 Jul, 2008
5 commits
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This patch adds a driver for subchannels of type chsc.
A device /dev/chsc is created which may be used to issue ioctls to:
- obtain information about the machine's I/O configuration
- dynamically change the machine's I/O configuration via
asynchronous chsc commandsSigned-off-by: Cornelia Huck
Signed-off-by: Martin Schwidefsky
Signed-off-by: Heiko Carstens -
Passing the affected chpid in chp_event() worked only by
chance since chpid is the first element in res_acc_data.
Make it work properly by generalizing res_acc_data as
chp_link and always passing around a properly filled out
chp_link structure in chp_event().Signed-off-by: Cornelia Huck
Signed-off-by: Martin Schwidefsky
Signed-off-by: Heiko Carstens -
Add support for clock synchronization with the server time protocol.
Signed-off-by: Martin Schwidefsky
Signed-off-by: Heiko Carstens -
Eliminate the need for the machine check handler to call into
the common I/O layer directly by introducing an interface to
register handlers for crws per rsc.Signed-off-by: Cornelia Huck
Signed-off-by: Martin Schwidefsky
Signed-off-by: Heiko Carstens -
Rework the css driver methods to provide sane callbacks for
subchannels of all types.As a bonus, this cleans up and simplyfies the machine check
handling for I/O subchannels a lot.Signed-off-by: Cornelia Huck
Signed-off-by: Martin Schwidefsky
Signed-off-by: Heiko Carstens
17 Apr, 2008
2 commits
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It is now possible to trigger cm_enable processing several times in
parallel without causing a kernel panic.Signed-off-by: Michael Ernst
Signed-off-by: Martin Schwidefsky
Signed-off-by: Heiko Carstens -
Make sure we wait for previous evaluations triggered by path state
changes to have settled before we manipulate path states again.Signed-off-by: Cornelia Huck
Signed-off-by: Martin Schwidefsky
Signed-off-by: Heiko Carstens
05 Feb, 2008
1 commit
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This provides unified return codes for common response codes and
also makes the debug feature messages more similar and informational.Signed-off-by: Cornelia Huck
Signed-off-by: Martin Schwidefsky
26 Jan, 2008
4 commits
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Signed-off-by: Joe Perches
Signed-off-by: Martin Schwidefsky -
Minimize calls to cpu intensive function get_subchannel_by_schid()
by introducing function for_each_subchannel_staged() which
temporarily caches the information about registered subchannels
in a bitmap.Signed-off-by: Peter Oberparleiter
Signed-off-by: Martin Schwidefsky -
Some fields may be !0 only for I/O subchannels. Add some checks
where required. Also adapt cio_enable_subchannel() to make the
caller specify the intparm, which makes it more generic.Signed-off-by: Cornelia Huck
Signed-off-by: Martin Schwidefsky -
Make all callbacks in css_driver take a struct subchannel (and not
a struct device).Signed-off-by: Cornelia Huck
Signed-off-by: Martin Schwidefsky
27 Jul, 2007
1 commit
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- Localize more of the init calls in init_channel_subsystem().
- Print a warning if init_channel_subsystem() failed.Signed-off-by: Cornelia Huck
Signed-off-by: Martin Schwidefsky