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| author | Alexandra Winter <wintera@linux.ibm.com> | 2020-09-10 19:23:45 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-09-15 22:21:46 +0200 |
| commit | b983aa1f7d19a83906fb7d38d337a87fe8d7745a (patch) | |
| tree | 9674d612e9706b76647e68942028727955b68901 /drivers/s390/cio/chsc.c | |
| parent | s390/cio: Add new Operation Code OC3 to PNSO (diff) | |
| download | linux-b983aa1f7d19a83906fb7d38d337a87fe8d7745a.tar.xz linux-b983aa1f7d19a83906fb7d38d337a87fe8d7745a.zip | |
s390/cio: Helper functions to read CSSID, IID, and CHID
Add helper functions to expose Channel Subsystem ID (CSSID), MIF Image Id
(IID), Channel ID (CHID) and Channel Path ID (CHPID).
These values are required by the qeth driver's exploitation of network-
address-change-notifications to determine which entries belong to this
interface.
Store the Partition identifier in System log, as this may be used to map
a Linux view to a Hardware view for debugging purpose.
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Reviewed-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/cio/chsc.c')
| -rw-r--r-- | drivers/s390/cio/chsc.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index 8f764a295a51..38017c4a31e9 100644 --- a/drivers/s390/cio/chsc.c +++ b/drivers/s390/cio/chsc.c @@ -1116,7 +1116,7 @@ int chsc_enable_facility(int operation_code) return ret; } -int __init chsc_get_cssid(int idx) +int __init chsc_get_cssid_iid(int idx, u8 *cssid, u8 *iid) { struct { struct chsc_header request; @@ -1127,7 +1127,8 @@ int __init chsc_get_cssid(int idx) u32 reserved2[3]; struct { u8 cssid; - u32 : 24; + u8 iid; + u32 : 16; } list[0]; } *sdcal_area; int ret; @@ -1153,8 +1154,10 @@ int __init chsc_get_cssid(int idx) } if ((addr_t) &sdcal_area->list[idx] < - (addr_t) &sdcal_area->response + sdcal_area->response.length) - ret = sdcal_area->list[idx].cssid; + (addr_t) &sdcal_area->response + sdcal_area->response.length) { + *cssid = sdcal_area->list[idx].cssid; + *iid = sdcal_area->list[idx].iid; + } else ret = -ENODEV; exit: |