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s390/zcrypt: add multi domain support

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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>
This commit is contained in:
Ingo Tuchscherer 2016-08-25 11:16:03 +02:00 • committed by Martin Schwidefsky
parent 34a1516773
commit e28d2af436
17 changed files with 2795 additions and 2017 deletions
Download patch file Download diff file Expand all files Collapse all files

3
include/linux/mod_devicetable.h
View file

@ -175,7 +175,8 @@ struct ap_device_id {
kernel_ulong_t driver_info;
};
#define AP_DEVICE_ID_MATCH_DEVICE_TYPE 0x01
#define AP_DEVICE_ID_MATCH_CARD_TYPE 0x01
#define AP_DEVICE_ID_MATCH_QUEUE_TYPE 0x02
/* s390 css bus devices (subchannels) */
struct css_device_id {