s390/cio: add function chsc_sgib()
This patch implements the Set Guest Information Block operation
to request association or disassociation of a Guest Information
Block (GIB) with the Adapter Interruption Facility. The operation
is required to receive GIB alert interrupts for guest adapters
in conjunction with AIV and GISA.
Signed-off-by: Michael Mueller <mimu@linux.ibm.com>
Reviewed-by: Sebastian Ott <sebott@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com>
Acked-by: Janosch Frank <frankja@linux.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20190131085247.13826-9-mimu@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index a0baee2..4159c63 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -1382,3 +1382,40 @@ int chsc_pnso_brinfo(struct subchannel_id schid,
return chsc_error_from_response(brinfo_area->response.code);
}
EXPORT_SYMBOL_GPL(chsc_pnso_brinfo);
+
+int chsc_sgib(u32 origin)
+{
+ struct {
+ struct chsc_header request;
+ u16 op;
+ u8 reserved01[2];
+ u8 reserved02:4;
+ u8 fmt:4;
+ u8 reserved03[7];
+ /* operation data area begin */
+ u8 reserved04[4];
+ u32 gib_origin;
+ u8 reserved05[10];
+ u8 aix;
+ u8 reserved06[4029];
+ struct chsc_header response;
+ u8 reserved07[4];
+ } *sgib_area;
+ int ret;
+
+ spin_lock_irq(&chsc_page_lock);
+ memset(chsc_page, 0, PAGE_SIZE);
+ sgib_area = chsc_page;
+ sgib_area->request.length = 0x0fe0;
+ sgib_area->request.code = 0x0021;
+ sgib_area->op = 0x1;
+ sgib_area->gib_origin = origin;
+
+ ret = chsc(sgib_area);
+ if (ret == 0)
+ ret = chsc_error_from_response(sgib_area->response.code);
+ spin_unlock_irq(&chsc_page_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(chsc_sgib);
