s390/cio, s390/qeth: cleanup PNSO CHSC

CHSC3D (PNSO - perform network subchannel operation) is used for
OC0 (Store-network-bridging-information) as well as for
OC3 (Store-network-address-information). So common fields are renamed
from *brinfo* to *pnso*.
Also *_bridge_host_* is changed into *_addr_change_*, e.g.
qeth_bridge_host_event to qeth_addr_change_event, for the
same reasons.
The keywords in the card traces are changed accordingly.

Remove unused L3 types, as PNSO will only return Layer2 entries.

Make PNSO CHSC implementation more consistent with existing API usage:
Add new function ccw_device_pnso() to drivers/s390/cio/device_ops.c and
the function declaration to arch/s390/include/asm/ccwdev.h, which takes
a struct ccw_device * as parameter instead of schid and calls
chsc_pnso().

PNSO CHSC has no strict relationship to qdio. So move the calling
function from qdio to qeth_l2 and move the necessary structures to a
new file arch/s390/include/asm/chsc.h.

Do response code evaluation only in chsc_error_from_response() and
use return code in all other places. qeth_anset_makerc() was meant to
evaluate the PNSO response code, but never did, because pnso_rc was
already non-zero.

Indentation was corrected in some places.

Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Reviewed-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Reviewed-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/drivers/s390/cio/device_ops.c b/drivers/s390/cio/device_ops.c
index ccecf6b9504e..963fcc9054c6 100644
--- a/drivers/s390/cio/device_ops.c
+++ b/drivers/s390/cio/device_ops.c
@@ -710,6 +710,29 @@ void ccw_device_get_schid(struct ccw_device *cdev, struct subchannel_id *schid)
 }
 EXPORT_SYMBOL_GPL(ccw_device_get_schid);
 
+/**
+ * ccw_device_pnso() - Perform Network-Subchannel Operation
+ * @cdev:		device on which PNSO is performed
+ * @pnso_area:		request and response block for the operation
+ * @resume_token:	resume token for multiblock response
+ * @cnc:		Boolean change-notification control
+ *
+ * pnso_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL)
+ *
+ * Returns 0 on success.
+ */
+int ccw_device_pnso(struct ccw_device *cdev,
+		    struct chsc_pnso_area *pnso_area,
+		    struct chsc_pnso_resume_token resume_token,
+		    int cnc)
+{
+	struct subchannel_id schid;
+
+	ccw_device_get_schid(cdev, &schid);
+	return chsc_pnso(schid, pnso_area, resume_token, cnc);
+}
+EXPORT_SYMBOL_GPL(ccw_device_pnso);
+
 /*
  * Allocate zeroed dma coherent 31 bit addressable memory using
  * the subchannels dma pool. Maximal size of allocation supported