* SOFTWARE.
*/
+#include <rdma/ib_addr.h>
+
#include <linux/slab.h>
+#include <linux/inet.h>
+#include <linux/string.h>
#include "mlx4_ib.h"
-struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
+int mlx4_ib_resolve_grh(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah_attr,
+ u8 *mac, int *is_mcast, u8 port)
{
- struct mlx4_dev *dev = to_mdev(pd->device)->dev;
- struct mlx4_ib_ah *ah;
+ struct in6_addr in6;
- ah = kmalloc(sizeof *ah, GFP_ATOMIC);
- if (!ah)
- return ERR_PTR(-ENOMEM);
+ *is_mcast = 0;
- memset(&ah->av, 0, sizeof ah->av);
+ memcpy(&in6, ah_attr->grh.dgid.raw, sizeof in6);
+ if (rdma_link_local_addr(&in6))
+ rdma_get_ll_mac(&in6, mac);
+ else if (rdma_is_multicast_addr(&in6)) {
+ rdma_get_mcast_mac(&in6, mac);
+ *is_mcast = 1;
+ } else
+ return -EINVAL;
- ah->av.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24));
- ah->av.g_slid = ah_attr->src_path_bits;
- ah->av.dlid = cpu_to_be16(ah_attr->dlid);
- if (ah_attr->static_rate) {
- ah->av.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET;
- while (ah->av.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
- !(1 << ah->av.stat_rate & dev->caps.stat_rate_support))
- --ah->av.stat_rate;
- }
- ah->av.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
+ return 0;
+}
+
+static struct ib_ah *create_ib_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr,
+ struct mlx4_ib_ah *ah)
+{
+ struct mlx4_dev *dev = to_mdev(pd->device)->dev;
+
+ ah->av.ib.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24));
+ ah->av.ib.g_slid = ah_attr->src_path_bits;
if (ah_attr->ah_flags & IB_AH_GRH) {
- ah->av.g_slid |= 0x80;
- ah->av.gid_index = ah_attr->grh.sgid_index;
- ah->av.hop_limit = ah_attr->grh.hop_limit;
- ah->av.sl_tclass_flowlabel |=
+ ah->av.ib.g_slid |= 0x80;
+ ah->av.ib.gid_index = ah_attr->grh.sgid_index;
+ ah->av.ib.hop_limit = ah_attr->grh.hop_limit;
+ ah->av.ib.sl_tclass_flowlabel |=
cpu_to_be32((ah_attr->grh.traffic_class << 20) |
ah_attr->grh.flow_label);
- memcpy(ah->av.dgid, ah_attr->grh.dgid.raw, 16);
+ memcpy(ah->av.ib.dgid, ah_attr->grh.dgid.raw, 16);
+ }
+
+ ah->av.ib.dlid = cpu_to_be16(ah_attr->dlid);
+ if (ah_attr->static_rate) {
+ ah->av.ib.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET;
+ while (ah->av.ib.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
+ !(1 << ah->av.ib.stat_rate & dev->caps.stat_rate_support))
+ --ah->av.ib.stat_rate;
}
+ ah->av.ib.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
return &ah->ibah;
}
+static struct ib_ah *create_iboe_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr,
+ struct mlx4_ib_ah *ah)
+{
+ struct mlx4_ib_dev *ibdev = to_mdev(pd->device);
+ struct mlx4_dev *dev = ibdev->dev;
+ u8 mac[6];
+ int err;
+ int is_mcast;
+
+ err = mlx4_ib_resolve_grh(ibdev, ah_attr, mac, &is_mcast, ah_attr->port_num);
+ if (err)
+ return ERR_PTR(err);
+
+ memcpy(ah->av.eth.mac, mac, 6);
+ ah->av.eth.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24));
+ ah->av.eth.gid_index = ah_attr->grh.sgid_index;
+ if (ah_attr->static_rate) {
+ ah->av.eth.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET;
+ while (ah->av.eth.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET &&
+ !(1 << ah->av.eth.stat_rate & dev->caps.stat_rate_support))
+ --ah->av.eth.stat_rate;
+ }
+
+ /*
+ * HW requires multicast LID so we just choose one.
+ */
+ if (is_mcast)
+ ah->av.ib.dlid = cpu_to_be16(0xc000);
+
+ memcpy(ah->av.eth.dgid, ah_attr->grh.dgid.raw, 16);
+ ah->av.eth.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
+
+ return &ah->ibah;
+}
+
+struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
+{
+ struct mlx4_ib_ah *ah;
+ struct ib_ah *ret;
+
+ ah = kzalloc(sizeof *ah, GFP_ATOMIC);
+ if (!ah)
+ return ERR_PTR(-ENOMEM);
+
+ if (rdma_port_get_link_layer(pd->device, ah_attr->port_num) == IB_LINK_LAYER_ETHERNET) {
+ if (!(ah_attr->ah_flags & IB_AH_GRH)) {
+ ret = ERR_PTR(-EINVAL);
+ } else {
+ /*
+ * TBD: need to handle the case when we get
+ * called in an atomic context and there we
+ * might sleep. We don't expect this
+ * currently since we're working with link
+ * local addresses which we can translate
+ * without going to sleep.
+ */
+ ret = create_iboe_ah(pd, ah_attr, ah);
+ }
+
+ if (IS_ERR(ret))
+ kfree(ah);
+
+ return ret;
+ } else
+ return create_ib_ah(pd, ah_attr, ah); /* never fails */
+}
+
int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
{
struct mlx4_ib_ah *ah = to_mah(ibah);
+ enum rdma_link_layer ll;
memset(ah_attr, 0, sizeof *ah_attr);
- ah_attr->dlid = be16_to_cpu(ah->av.dlid);
- ah_attr->sl = be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 28;
- ah_attr->port_num = be32_to_cpu(ah->av.port_pd) >> 24;
- if (ah->av.stat_rate)
- ah_attr->static_rate = ah->av.stat_rate - MLX4_STAT_RATE_OFFSET;
- ah_attr->src_path_bits = ah->av.g_slid & 0x7F;
+ ah_attr->sl = be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
+ ah_attr->port_num = be32_to_cpu(ah->av.ib.port_pd) >> 24;
+ ll = rdma_port_get_link_layer(ibah->device, ah_attr->port_num);
+ ah_attr->dlid = ll == IB_LINK_LAYER_INFINIBAND ? be16_to_cpu(ah->av.ib.dlid) : 0;
+ if (ah->av.ib.stat_rate)
+ ah_attr->static_rate = ah->av.ib.stat_rate - MLX4_STAT_RATE_OFFSET;
+ ah_attr->src_path_bits = ah->av.ib.g_slid & 0x7F;
if (mlx4_ib_ah_grh_present(ah)) {
ah_attr->ah_flags = IB_AH_GRH;
ah_attr->grh.traffic_class =
- be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 20;
+ be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20;
ah_attr->grh.flow_label =
- be32_to_cpu(ah->av.sl_tclass_flowlabel) & 0xfffff;
- ah_attr->grh.hop_limit = ah->av.hop_limit;
- ah_attr->grh.sgid_index = ah->av.gid_index;
- memcpy(ah_attr->grh.dgid.raw, ah->av.dgid, 16);
+ be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) & 0xfffff;
+ ah_attr->grh.hop_limit = ah->av.ib.hop_limit;
+ ah_attr->grh.sgid_index = ah->av.ib.gid_index;
+ memcpy(ah_attr->grh.dgid.raw, ah->av.ib.dgid, 16);
}
return 0;
git.openpandora.org / pandora-kernel.git / blobdiff