linux-toradex.git/drivers/s390/crypto/zcrypt_api.h, branch v5.0

s390/zcrypt: zcrypt device driver cleanup

2018-10-09T09:21:35+00:00

Some cleanup in the s390 zcrypt device driver:
- Removed fragments of pcixx crypto card code. This code
  can't be reached anymore because the hardware detection
  function does not recognize crypto cards < CEX2 since
  commit f56545430736 ("s390/zcrypt: Introduce QACT support
  for AP bus devices.")
- Rename of some files and driver names which where still
  reflecting pcixx support to cex2a/cex2c.
- Removed all the zcrypt version strings in the file headers.
  There is only one place left - the zcrypt.h header file is
  now the only place for zcrypt device driver version info.
- Zcrypt version pump up from 2.2.0 to 2.2.1.

Signed-off-by: Harald Freudenberger 
Signed-off-by: Martin Schwidefsky

s390/zcrypt: code beautify

2018-08-20T14:02:11+00:00

Code beautify by following most of the checkpatch suggestions:
 - SPDX license identifier line complains by checkpatch
 - missing space or newline complains by checkpatch
 - octal numbers for permssions complains by checkpatch
 - renaming of static sysfs functions complains by checkpatch
 - fix of block comment complains by checkpatch
 - fix printf like calls where function name instead of %s __func__
   was used
 - __packed instead of __attribute__((packed))
 - init to zero for static variables removed
 - use of DEVICE_ATTR_RO and DEVICE_ATTR_RW macros

No functional code changes or API changes!

Signed-off-by: Harald Freudenberger 
Signed-off-by: Martin Schwidefsky

s390/zcrypt: Support up to 256 crypto adapters.

2018-04-11T08:36:27+00:00

There was an artificial restriction on the card/adapter id
to only 6 bits but all the AP commands do support adapter
ids with 8 bit. This patch removes this restriction to 64
adapters and now up to 256 adapter can get addressed.

Some of the ioctl calls work on the max number of cards
possible (which was 64). These ioctls are now deprecated
but still supported. All the defines, structs and ioctl
interface declarations have been kept for compabibility.
There are now new ioctls (and defines for these) with an
additional '2' appended which provide the extended versions
with 256 cards supported.

Signed-off-by: Harald Freudenberger 
Signed-off-by: Martin Schwidefsky

s390/zcrypt: Remove deprecated ioctls.

2018-04-10T05:39:01+00:00

This patch removes the old status calls which have been marked
as deprecated since at least 2 years now. There is no known
application or library relying on these ioctls any more.

Signed-off-by: Harald Freudenberger 
Signed-off-by: Martin Schwidefsky

s390: crypto: Remove redundant license text

2017-11-24T13:28:46+00:00

Now that the SPDX tag is in all drivers/s390/crypto/ files, that
identifies the license in a specific and legally-defined manner.  So the
extra GPL text wording can be removed as it is no longer needed at all.

This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text.  And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.

No copyright headers or other non-license-description text was removed.

Cc: Harald Freudenberger 
Cc: Martin Schwidefsky 
Cc: Heiko Carstens 
Cc: "Paul E. McKenney" 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390: crypto: add SPDX identifiers to the remaining files

2017-11-24T13:28:39+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/crypto/ 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: Harald Freudenberger 
Cc: Martin Schwidefsky 
Cc: Heiko Carstens 
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/zcrypt: CEX6S exploitation

2017-10-23T07:07:12+00:00

This patch adds the full CEX6S card support to the zcrypt device
driver. A CEX6A/C/P is detected and displayed as such, the card
and queue device driver code is updated to recognize it and the
relative weight values for CEX4, CEX5 and CEX6 have been updated.

Signed-off-by: Harald Freudenberger 
Signed-off-by: Martin Schwidefsky

s390/zcrypt: export additional symbols

2017-02-23T09:06:40+00:00

Export the two zcrypt device driver functions zcrypt_send_cprb and
zcrypt_device_status_mask to be useable for other kernel code.

Signed-off-by: Harald Freudenberger 
Signed-off-by: Martin Schwidefsky

s390/zcrypt: Rework debug feature invocations.

2016-12-14T15:33:39+00:00

Rework the debug feature calls and initialization.  There
are now two debug feature entries used by the zcrypt code.
The first is 'ap' with all the AP bus related stuff and the
second is 'zcrypt' with all the zcrypt and devices and
driver related entries. However, there isn't much traffic on
both debug features. The ap bus code emits only some debug
info and for zcrypt devices on appearance and disappearance
there is an entry written.

The new dbf invocations use the sprintf buffer layout,
whereas the old implementation used the ascii dbf buffer.
There are now 5*8=40 bytes used for each entry, resulting in
5 parameters per call. As the sprintf buffer needs a format
string the first parameter provides this and so up to 4 more
parameters can be used. Alltogehter the new layout should be
much more human readable for customers and test.

Signed-off-by: Harald Freudenberger 
Signed-off-by: Martin Schwidefsky

s390/zcrypt: add multi domain support

2016-12-14T15:33:38+00:00

Currently the ap infrastructure only supports one domain at a time.
This feature extends the generic cryptographic device driver to
support multiple cryptographic domains simultaneously.

There are now card and queue devices on the AP bus with independent
card and queue drivers. The new /sys layout is as follows:

/sys/bus/ap
    devices
        . -> ../../../devices/ap/card/.
        ...
        card -> ../../../devices/ap/card
        ...
    drivers
        card
            card -> ../../../../devices/ap/card
        queue
            . -> ../../../../devices/ap/card/.
            ...

/sys/devices/ap
    card
        .
            driver -> ../../../../bus/ap/drivers/queue
            ...
        driver -> ../../../bus/ap/drivers/card
        ...

The two digit  field is the card number, the four digit 
field is the queue number and  is the name of the device driver,
e.g. "cex4".

For compatability /sys/bus/ap/card for the old layout has to exist,
including the attributes that used to reside there.

With additional contributions from Harald Freudenberger and
Martin Schwidefsky.

Signed-off-by: Ingo Tuchscherer 
Signed-off-by: Martin Schwidefsky