litmus-rt-tegra.git/drivers/s390/cio/chsc.h, branch wip-nested-locking

Patched in Tegra support.

2013-01-17T21:15:55+00:00

s390: add scm notification

2012-09-26T13:44:59+00:00

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

s390/chsc: implement store SCM information

2012-09-26T13:44:58+00:00

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

s390: add eadm facility bits

2012-09-26T13:44:57+00:00

Add the eadm facility bits to the css characteristics and move
them to a new header.

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

[S390] cio: obtain mdc value per channel path

2011-01-05T11:47:28+00:00

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

[S390] chsc: use the global page to determine the chp desriptor

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

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

[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

[S390] cio: CHSC SIOSL Support

2010-08-09T16:12:53+00:00

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

[S390] cio: move scsw helper functions to header file

2009-09-11T08:29:36+00:00

All scsw helper functions are very short and usage of them shouldn't
result in function calls. Therefore we move them to a separate header
file.
Also saves a lot of EXPORT_SYMBOLs.

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