RDMA/ocrdma: set vlan present bit for user AH

For the AH that describs a VLAN interface details, vlan present bit
needs to be set during posting a WQE. This patch adds the code to
allow it happening.

Signed-off-by: Mitesh Ahuja <mitesh.ahuja@emulex.com>
Signed-off-by: Devesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

4 files changed, 22 insertions, 6 deletions

diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_ah.c b/drivers/infiniband/hw/ocrdma/ocrdma_ah.c
index b80b57b40043..d812904f3984 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_ah.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_ah.c
@@ -40,10 +40,11 @@
 #define OCRDMA_VID_PCP_SHIFT    0xD
 
 static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah,
-                        struct ib_ah_attr *attr, union ib_gid *sgid, int pdid)
+                        struct ib_ah_attr *attr, union ib_gid *sgid,
+                        int pdid, bool *isvlan)
 {
         int status = 0;
-        u16 vlan_tag; bool vlan_enabled = false;
+        u16 vlan_tag;
         struct ocrdma_eth_vlan eth;
         struct ocrdma_grh grh;
         int eth_sz;
@@ -61,7 +62,7 @@ static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah,
                 vlan_tag |= (dev->sl & 0x07) << OCRDMA_VID_PCP_SHIFT;
                 eth.vlan_tag = cpu_to_be16(vlan_tag);
                 eth_sz = sizeof(struct ocrdma_eth_vlan);
-                vlan_enabled = true;
+                *isvlan = true;
         } else {
                 eth.eth_type = cpu_to_be16(OCRDMA_ROCE_ETH_TYPE);
                 eth_sz = sizeof(struct ocrdma_eth_basic);
@@ -84,7 +85,7 @@ static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah,
         /* Eth HDR */
         memcpy(&ah->av->eth_hdr, &eth, eth_sz);
         memcpy((u8 *)ah->av + eth_sz, &grh, sizeof(struct ocrdma_grh));
-        if (vlan_enabled)
+        if (*isvlan)
                 ah->av->valid |= OCRDMA_AV_VLAN_VALID;
         ah->av->valid = cpu_to_le32(ah->av->valid);
         return status;
@@ -93,6 +94,7 @@ static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah,
 struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr)
 {
         u32 *ahid_addr;
+        bool isvlan = false;
         int status;
         struct ocrdma_ah *ah;
         struct ocrdma_pd *pd = get_ocrdma_pd(ibpd);
@@ -129,15 +131,20 @@ struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr)
                 }
         }
 
-        status = set_av_attr(dev, ah, attr, &sgid, pd->id);
+        status = set_av_attr(dev, ah, attr, &sgid, pd->id, &isvlan);
         if (status)
                 goto av_conf_err;
 
         /* if pd is for the user process, pass the ah_id to user space */
         if ((pd->uctx) && (pd->uctx->ah_tbl.va)) {
                 ahid_addr = pd->uctx->ah_tbl.va + attr->dlid;
-                *ahid_addr = ah->id;
+                *ahid_addr = 0;
+                *ahid_addr |= ah->id & OCRDMA_AH_ID_MASK;
+                if (isvlan)
+                        *ahid_addr |= (OCRDMA_AH_VLAN_VALID_MASK <<
+                                       OCRDMA_AH_VLAN_VALID_SHIFT);
         }
+
         return &ah->ibah;
 
 av_conf_err:
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_ah.h b/drivers/infiniband/hw/ocrdma/ocrdma_ah.h
index 8ac49e7f96d1..726a87cf22dc 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_ah.h
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_ah.h
@@ -28,6 +28,12 @@
 #ifndef __OCRDMA_AH_H__
 #define __OCRDMA_AH_H__
 
+enum {
+        OCRDMA_AH_ID_MASK               = 0x3FF,
+        OCRDMA_AH_VLAN_VALID_MASK       = 0x01,
+        OCRDMA_AH_VLAN_VALID_SHIFT      = 0x1F
+};
+
 struct ib_ah *ocrdma_create_ah(struct ib_pd *, struct ib_ah_attr *);
 int ocrdma_destroy_ah(struct ib_ah *);
 int ocrdma_query_ah(struct ib_ah *, struct ib_ah_attr *);
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_sli.h b/drivers/infiniband/hw/ocrdma/ocrdma_sli.h
index 801883aa4145..243c87c8bd65 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_sli.h
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_sli.h
@@ -1734,6 +1734,7 @@ enum {
         OCRDMA_FLAG_FENCE_R     = 0x8,
         OCRDMA_FLAG_SOLICIT     = 0x10,
         OCRDMA_FLAG_IMM         = 0x20,
+        OCRDMA_FLAG_AH_VLAN_PR  = 0x40,
 
         /* Stag flags */
         OCRDMA_LKEY_FLAG_LOCAL_WR       = 0x1,
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
index 4d5f581af49a..5f656b936de4 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
@@ -1937,6 +1937,8 @@ static void ocrdma_build_ud_hdr(struct ocrdma_qp *qp,
         else
                 ud_hdr->qkey = wr->wr.ud.remote_qkey;
         ud_hdr->rsvd_ahid = ah->id;
+        if (ah->av->valid & OCRDMA_AV_VLAN_VALID)
+                hdr->cw |= (OCRDMA_FLAG_AH_VLAN_PR << OCRDMA_WQE_FLAGS_SHIFT);
 }
 
 static void ocrdma_build_sges(struct ocrdma_hdr_wqe *hdr,