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path: root/drivers/infiniband/core/verbs.c
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Diffstat (limited to 'drivers/infiniband/core/verbs.c')
-rw-r--r--drivers/infiniband/core/verbs.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 2516f964651..506fdf1f2a2 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -41,6 +41,7 @@
#include <linux/err.h>
#include <ib_verbs.h>
+#include <ib_cache.h>
/* Protection domains */
@@ -88,6 +89,40 @@ struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
}
EXPORT_SYMBOL(ib_create_ah);
+struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
+ struct ib_grh *grh, u8 port_num)
+{
+ struct ib_ah_attr ah_attr;
+ u32 flow_class;
+ u16 gid_index;
+ int ret;
+
+ memset(&ah_attr, 0, sizeof ah_attr);
+ ah_attr.dlid = wc->slid;
+ ah_attr.sl = wc->sl;
+ ah_attr.src_path_bits = wc->dlid_path_bits;
+ ah_attr.port_num = port_num;
+
+ if (wc->wc_flags & IB_WC_GRH) {
+ ah_attr.ah_flags = IB_AH_GRH;
+ ah_attr.grh.dgid = grh->dgid;
+
+ ret = ib_find_cached_gid(pd->device, &grh->sgid, &port_num,
+ &gid_index);
+ if (ret)
+ return ERR_PTR(ret);
+
+ ah_attr.grh.sgid_index = (u8) gid_index;
+ flow_class = be32_to_cpu(grh->version_tclass_flow);
+ ah_attr.grh.flow_label = flow_class & 0xFFFFF;
+ ah_attr.grh.traffic_class = (flow_class >> 20) & 0xFF;
+ ah_attr.grh.hop_limit = grh->hop_limit;
+ }
+
+ return ib_create_ah(pd, &ah_attr);
+}
+EXPORT_SYMBOL(ib_create_ah_from_wc);
+
int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
{
return ah->device->modify_ah ?