IB/ipath: Add P_Key change event support

Deliver P_Key_CHANGE event through the relevant IB device when
the local pkey table changes.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 10 insertions, 4 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_mad.c b/drivers/infiniband/hw/ipath/ipath_mad.c
index 43f2d0424d4f..e890e5ba0e01 100644
--- a/drivers/infiniband/hw/ipath/ipath_mad.c
+++ b/drivers/infiniband/hw/ipath/ipath_mad.c
@@ -726,7 +726,7 @@ bail:
  * @dd: the infinipath device
  * @pkeys: the PKEY table
  */
-static int set_pkeys(struct ipath_devdata *dd, u16 *pkeys)
+static int set_pkeys(struct ipath_devdata *dd, u16 *pkeys, u8 port)
 {
         struct ipath_portdata *pd;
         int i;
@@ -759,6 +759,7 @@ static int set_pkeys(struct ipath_devdata *dd, u16 *pkeys)
         }
         if (changed) {
                 u64 pkey;
+                struct ib_event event;
 
                 pkey = (u64) dd->ipath_pkeys[0] |
                         ((u64) dd->ipath_pkeys[1] << 16) |
@@ -768,12 +769,17 @@ static int set_pkeys(struct ipath_devdata *dd, u16 *pkeys)
                            (unsigned long long) pkey);
                 ipath_write_kreg(dd, dd->ipath_kregs->kr_partitionkey,
                                  pkey);
+
+                event.event = IB_EVENT_PKEY_CHANGE;
+                event.device = &dd->verbs_dev->ibdev;
+                event.element.port_num = port;
+                ib_dispatch_event(&event);
         }
         return 0;
 }
 
 static int recv_subn_set_pkeytable(struct ib_smp *smp,
-                                   struct ib_device *ibdev)
+                                   struct ib_device *ibdev, u8 port)
 {
         u32 startpx = 32 * (be32_to_cpu(smp->attr_mod) & 0xffff);
         __be16 *p = (__be16 *) smp->data;
@@ -784,7 +790,7 @@ static int recv_subn_set_pkeytable(struct ib_smp *smp,
         for (i = 0; i < n; i++)
                 q[i] = be16_to_cpu(p[i]);
 
-        if (startpx != 0 || set_pkeys(dev->dd, q) != 0)
+        if (startpx != 0 || set_pkeys(dev->dd, q, port) != 0)
                 smp->status |= IB_SMP_INVALID_FIELD;
 
         return recv_subn_get_pkeytable(smp, ibdev);
@@ -1342,7 +1348,7 @@ static int process_subn(struct ib_device *ibdev, int mad_flags,
                         ret = recv_subn_set_portinfo(smp, ibdev, port_num);
                         goto bail;
                 case IB_SMP_ATTR_PKEY_TABLE:
-                        ret = recv_subn_set_pkeytable(smp, ibdev);
+                        ret = recv_subn_set_pkeytable(smp, ibdev, port_num);
                         goto bail;
                 case IB_SMP_ATTR_SM_INFO:
                         if (dev->port_cap_flags & IB_PORT_SM_DISABLED) {