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authorJack Morgenstein <jackm@mellanox.co.il>2006-02-26 16:05:59 -0800
committerRoland Dreier <rolandd@cisco.com>2006-03-20 10:08:17 -0800
commit1d89b1ae6c203bc68a3f424be144abcdf62773c9 (patch)
tree9d1979c98843ba7d18f6272f13ea06c2591ee8d5 /drivers
parent14abdffcc0a0ca9c5bb3274648d073e09a6fd2ba (diff)
downloadop-kernel-dev-1d89b1ae6c203bc68a3f424be144abcdf62773c9.zip
op-kernel-dev-1d89b1ae6c203bc68a3f424be144abcdf62773c9.tar.gz
IB/mthca: Implement query_ah method
Implement query_ah (except for AVs which are in HCA memory). This is needed to implement RMPP duplicate session detection on sending side (extraction of DGID/DLID and GRH flag from address handle). Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/infiniband/hw/mthca/mthca_av.c31
-rw-r--r--drivers/infiniband/hw/mthca/mthca_dev.h1
-rw-r--r--drivers/infiniband/hw/mthca/mthca_provider.c1
3 files changed, 33 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_av.c b/drivers/infiniband/hw/mthca/mthca_av.c
index 198f126..f023d39 100644
--- a/drivers/infiniband/hw/mthca/mthca_av.c
+++ b/drivers/infiniband/hw/mthca/mthca_av.c
@@ -193,6 +193,37 @@ int mthca_read_ah(struct mthca_dev *dev, struct mthca_ah *ah,
return 0;
}
+int mthca_ah_query(struct ib_ah *ibah, struct ib_ah_attr *attr)
+{
+ struct mthca_ah *ah = to_mah(ibah);
+ struct mthca_dev *dev = to_mdev(ibah->device);
+
+ /* Only implement for MAD and memfree ah for now. */
+ if (ah->type == MTHCA_AH_ON_HCA)
+ return -ENOSYS;
+
+ memset(attr, 0, sizeof *attr);
+ attr->dlid = be16_to_cpu(ah->av->dlid);
+ attr->sl = be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 28;
+ attr->static_rate = ah->av->msg_sr & 0x7;
+ attr->src_path_bits = ah->av->g_slid & 0x7F;
+ attr->port_num = be32_to_cpu(ah->av->port_pd) >> 24;
+ attr->ah_flags = mthca_ah_grh_present(ah) ? IB_AH_GRH : 0;
+
+ if (attr->ah_flags) {
+ attr->grh.traffic_class =
+ be32_to_cpu(ah->av->sl_tclass_flowlabel) >> 20;
+ attr->grh.flow_label =
+ be32_to_cpu(ah->av->sl_tclass_flowlabel) & 0xfffff;
+ attr->grh.hop_limit = ah->av->hop_limit;
+ attr->grh.sgid_index = ah->av->gid_index &
+ (dev->limits.gid_table_len - 1);
+ memcpy(attr->grh.dgid.raw, ah->av->dgid, 16);
+ }
+
+ return 0;
+}
+
int __devinit mthca_init_av_table(struct mthca_dev *dev)
{
int err;
diff --git a/drivers/infiniband/hw/mthca/mthca_dev.h b/drivers/infiniband/hw/mthca/mthca_dev.h
index b2aea80..ea48c89 100644
--- a/drivers/infiniband/hw/mthca/mthca_dev.h
+++ b/drivers/infiniband/hw/mthca/mthca_dev.h
@@ -539,6 +539,7 @@ int mthca_create_ah(struct mthca_dev *dev,
int mthca_destroy_ah(struct mthca_dev *dev, struct mthca_ah *ah);
int mthca_read_ah(struct mthca_dev *dev, struct mthca_ah *ah,
struct ib_ud_header *header);
+int mthca_ah_query(struct ib_ah *ibah, struct ib_ah_attr *attr);
int mthca_ah_grh_present(struct mthca_ah *ah);
int mthca_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid);
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c
index 084bea5..2c250bc 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -1289,6 +1289,7 @@ int mthca_register_device(struct mthca_dev *dev)
dev->ib_dev.alloc_pd = mthca_alloc_pd;
dev->ib_dev.dealloc_pd = mthca_dealloc_pd;
dev->ib_dev.create_ah = mthca_ah_create;
+ dev->ib_dev.query_ah = mthca_ah_query;
dev->ib_dev.destroy_ah = mthca_ah_destroy;
if (dev->mthca_flags & MTHCA_FLAG_SRQ) {
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