diff options
Diffstat (limited to 'drivers/infiniband/core/verbs.c')
| -rw-r--r-- | drivers/infiniband/core/verbs.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c index 2516f964651..62951594eec 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 ? |