IB/ehca: Implement modify_port

Add "Modify Port" verb support to eHCA driver.  The IB communication
manager needs this to set the IsCM port capability bit when
initializing.

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

1 files changed, 24 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ehca/hcp_if.c b/drivers/infiniband/hw/ehca/hcp_if.c
index 3fb46e67df87..b564fcd3b282 100644
--- a/drivers/infiniband/hw/ehca/hcp_if.c
+++ b/drivers/infiniband/hw/ehca/hcp_if.c
@@ -70,6 +70,10 @@
 #define H_ALL_RES_QP_SQUEUE_SIZE_PAGES  EHCA_BMASK_IBM(0, 31)
 #define H_ALL_RES_QP_RQUEUE_SIZE_PAGES  EHCA_BMASK_IBM(32, 63)
 
+#define H_MP_INIT_TYPE                  EHCA_BMASK_IBM(44, 47)
+#define H_MP_SHUTDOWN                   EHCA_BMASK_IBM(48, 48)
+#define H_MP_RESET_QKEY_CTR             EHCA_BMASK_IBM(49, 49)
+
 /* direct access qp controls */
 #define DAQP_CTRL_ENABLE    0x01
 #define DAQP_CTRL_SEND_COMP 0x20
@@ -364,6 +368,26 @@ u64 hipz_h_query_port(const struct ipz_adapter_handle adapter_handle,
         return ret;
 }
 
+u64 hipz_h_modify_port(const struct ipz_adapter_handle adapter_handle,
+                       const u8 port_id, const u32 port_cap,
+                       const u8 init_type, const int modify_mask)
+{
+        u64 port_attributes = port_cap;
+
+        if (modify_mask & IB_PORT_SHUTDOWN)
+                port_attributes |= EHCA_BMASK_SET(H_MP_SHUTDOWN, 1);
+        if (modify_mask & IB_PORT_INIT_TYPE)
+                port_attributes |= EHCA_BMASK_SET(H_MP_INIT_TYPE, init_type);
+        if (modify_mask & IB_PORT_RESET_QKEY_CNTR)
+                port_attributes |= EHCA_BMASK_SET(H_MP_RESET_QKEY_CTR, 1);
+
+        return ehca_plpar_hcall_norets(H_MODIFY_PORT,
+                                       adapter_handle.handle, /* r4 */
+                                       port_id,               /* r5 */
+                                       port_attributes,       /* r6 */
+                                       0, 0, 0, 0);
+}
+
 u64 hipz_h_query_hca(const struct ipz_adapter_handle adapter_handle,
                      struct hipz_query_hca *query_hca_rblock)
 {