IB/ehca: HW level, HW caps and MTU autodetection

In preparation for support of new eHCA2 features, change adapter probing:
 - Hardware level is changed to encode major and minor chip version
 - Hardware capabilities are queried from the firmware
 - The maximum MTU is queried from the firmware instead of assuming a
   fixed value

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/infiniband/hw/ehca/ehca_av.c b/drivers/infiniband/hw/ehca/ehca_av.c
index 0d6e2c4bb245..3cd6bf3402d1 100644
--- a/drivers/infiniband/hw/ehca/ehca_av.c
+++ b/drivers/infiniband/hw/ehca/ehca_av.c
@@ -118,7 +118,7 @@ struct ib_ah *ehca_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
                 }
                 memcpy(&av->av.grh.word_1, &gid, sizeof(gid));
         }
-        av->av.pmtu = EHCA_MAX_MTU;
+        av->av.pmtu = shca->max_mtu;
 
         /* dgid comes in grh.word_3 */
         memcpy(&av->av.grh.word_3, &ah_attr->grh.dgid,
@@ -137,6 +137,8 @@ int ehca_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
         struct ehca_av *av;
         struct ehca_ud_av new_ehca_av;
         struct ehca_pd *my_pd = container_of(ah->pd, struct ehca_pd, ib_pd);
+        struct ehca_shca *shca = container_of(ah->pd->device, struct ehca_shca,
+                                              ib_device);
         u32 cur_pid = current->tgid;
 
         if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
@@ -192,7 +194,7 @@ int ehca_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
                 memcpy(&new_ehca_av.grh.word_1, &gid, sizeof(gid));
         }
 
-        new_ehca_av.pmtu = EHCA_MAX_MTU;
+        new_ehca_av.pmtu = shca->max_mtu;
 
         memcpy(&new_ehca_av.grh.word_3, &ah_attr->grh.dgid,
                sizeof(ah_attr->grh.dgid));