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path: root/drivers/s390/crypto/ap_queue.c
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* s390/zcrypt: Fixed attrition of AP adapters and domainsIngo Tuchscherer2016-12-14
| | | | | | | | | | | | | Currently the first eligible AP adapter respectively domain will be selected to service requests. In case of sequential workload, the very same adapter/domain will be used. The adapter/domain selection algorithm now considers the completed transactions per adaper/domain and therefore ensures a homogeneous utilization. Signed-off-by: Ingo Tuchscherer <ingo.tuchscherer@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/zcrypt: add multi domain supportIngo Tuchscherer2016-12-14
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 <xx>.<yyyy> -> ../../../devices/ap/card<xx>/<xx>.<yyyy> ... card<xx> -> ../../../devices/ap/card<xx> ... drivers <drv>card card<xx> -> ../../../../devices/ap/card<xx> <drv>queue <xx>.<yyyy> -> ../../../../devices/ap/card<xx>/<xx>.<yyyy> ... /sys/devices/ap card<xx> <xx>.<yyyy> driver -> ../../../../bus/ap/drivers/<zzz>queue ... driver -> ../../../bus/ap/drivers/<drv>card ... The two digit <xx> field is the card number, the four digit <yyyy> field is the queue number and <drv> is the name of the device driver, e.g. "cex4". For compatability /sys/bus/ap/card<xx> 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 <ingo.tuchscherer@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>