linux-toradex.git/drivers/s390/crypto, branch v2.6.19.2

[S390] Improve AP bus device removal.

2006-10-27T10:39:26+00:00

Added a call to device_unregister() in ap_scan_bus() to actively
remove unavailable AP bus devices with every bus scan. Previously
devices were only removed in ap_queue_message() or __ap_poll_all().

Signed-off-by: Ralph Wuerthner 
Signed-off-by: Martin Schwidefsky

[S390] ap bus poll thread priority.

2006-10-06T14:38:22+00:00

The ap bus is supposed to have a low priority. We must use 19 instead
of -20, which is just the opposite.

Signed-off-by: Christian Borntraeger 
Signed-off-by: Martin Schwidefsky

[S390] zcrypt device registration/unregistration race.

2006-10-04T18:02:05+00:00

Fix a race condition during AP device registration and unregistration.

Signed-off-by: Ralph Wuerthner 
Signed-off-by: Martin Schwidefsky

[S390] zcrypt secure key cryptography extension.

2006-09-20T13:58:36+00:00

Allow the user space to send extended cprb messages directly to the
PCIXCC / CEX2C cards. This allows the CCA library to construct special
crypto requests that use "secure" keys that are stored on the card.

Signed-off-by: Ralph Wuerthner 
Signed-off-by: Martin Schwidefsky

[S390] zcrypt driver Makefile, Kconfig and monolithic build.

2006-09-20T13:58:34+00:00

The Makefile and Kconfig changes should be obvious. The monolithic
build option is there to create an old-style z90crypt module for
backward compatability to older distributions.

Signed-off-by: Ralph Wuerthner 
Signed-off-by: Martin Schwidefsky

[S390] zcrypt PCICC, PCIXCC coprocessor card ap bus drivers.

2006-09-20T13:58:32+00:00

Signed-off-by: Ralph Wuerthner 
Signed-off-by: Martin Schwidefsky

[S390] zcrypt CEX2A, CEX2C, PCICA accelerator card ap bus drivers.

2006-09-20T13:58:29+00:00

Signed-off-by: Ralph Wuerthner 
Signed-off-by: Martin Schwidefsky

[S390] zcrypt user space interface.

2006-09-20T13:58:27+00:00

The user space interface of the zcrypt device driver implements the old
user space interface as defined by the old z90crypt driver. Everything
is there, the /dev/z90crypt misc character device, all the lovely ioctls
and the /proc file. Even writing to the z90crypt proc file to configure
the crypto device still works. It stands to reason to remove the proc
write function someday since a much cleaner configuration via the sysfs
is now available.

The ap bus device drivers register crypto cards to the zcrypt user
space interface. The request router of the user space interface
picks one of the registered cards based on the predicted latency
for the request and calls the driver via a callback found in the
zcrypt_ops of the device. The request router only knows which
operations the card can do and the minimum / maximum number of bits
a request can have.

Signed-off-by: Cornelia Huck 
Signed-off-by: Ralph Wuerthner 
Signed-off-by: Martin Schwidefsky

[S390] zcrypt adjunct processor bus.

2006-09-20T13:58:25+00:00

Add a bus for the adjunct processor interface. Up to 64 devices can
be connect to the ap bus interface, each device with 16 domains. That
makes 1024 message queues. The interface is asynchronous, the answer
to a message sent to a queue needs to be received at some later point
in time. Unfortunately the interface does not provide interrupts when
a message reply is pending. So the ap bus needs to implement some
fancy polling, each active queue is polled once per 1/HZ second or
continuously if an idle cpus exsists and the poll thread is activ
(see poll_thread parameter).

The ap bus uses the sysfs path /sys/bus/ap and has two bus attributes,
ap_domain and config_time. The ap_domain selects one of the 16 domains
to be used for this system. This limits the maximum number of ap devices
to 64. The config_time attribute contains the number of seconds between
two ap bus scans to find new devices.

The ap bus uses the modalias entries of the form "ap:tN" to autoload
the ap driver for hardware type N. Currently known types are:
3 - PCICC, 4 - PCICA, 5 - PCIXCC, 6 - CEX2A and 7 - CEX2C.

Signed-off-by: Cornelia Huck 
Signed-off-by: Ralph Wuerthner 
Signed-off-by: Martin Schwidefsky

[S390] remove old z90crypt driver.

2006-09-20T13:58:22+00:00

The z90crypt driver has served its term. It is replaced by the shiny
new zcrypt device driver.

Signed-off-by: Martin Schwidefsky