[ewg] [PATCH 7/8 v3] mlx4: Add support for RDMAoE - address resolution
Eli Cohen
eli at mellanox.co.il
Mon Jul 13 11:17:43 PDT 2009
The following path handles address vectors creation for RDMAoE ports. mlx4 needs
the MAC address of the remote node to include it in the WQE of a UD QP or in
the QP context of connected QPs. Address resolution is done atomically in the
case of a link local address or using service from core/addr.c to do that. mlx4
transport packets were changed too to accomodate for RDMAoE.
Signed-off-by: Eli Cohen <eli at mellanox.co.il>
---
drivers/infiniband/hw/mlx4/ah.c | 228 ++++++++++++++++++++++++++-----
drivers/infiniband/hw/mlx4/mlx4_ib.h | 30 ++++-
drivers/infiniband/hw/mlx4/qp.c | 253 +++++++++++++++++++++++++++-------
include/linux/mlx4/device.h | 31 ++++-
include/linux/mlx4/qp.h | 8 +-
5 files changed, 463 insertions(+), 87 deletions(-)
diff --git a/drivers/infiniband/hw/mlx4/ah.c b/drivers/infiniband/hw/mlx4/ah.c
index c75ac94..c994e1f 100644
--- a/drivers/infiniband/hw/mlx4/ah.c
+++ b/drivers/infiniband/hw/mlx4/ah.c
@@ -31,63 +31,200 @@
*/
#include "mlx4_ib.h"
+#include <rdma/ib_addr.h>
+#include <linux/inet.h>
+#include <linux/string.h>
-struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
+static struct rdma_addr_client addr_client;
+
+struct resolve_ctx {
+ struct completion done;
+ int status;
+};
+
+
+static int status2err(int status)
{
- struct mlx4_dev *dev = to_mdev(pd->device)->dev;
- struct mlx4_ib_ah *ah;
+ return status; /* TBD */
+}
- ah = kmalloc(sizeof *ah, GFP_ATOMIC);
- if (!ah)
- return ERR_PTR(-ENOMEM);
+static void resolve_callback(int status, struct sockaddr *src_addr,
+ struct rdma_dev_addr *addr, void *context)
+{
+ struct resolve_ctx *ctx = context;
- memset(&ah->av, 0, sizeof ah->av);
+ ctx->status = status;
+ complete(&ctx->done);
+}
- 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;
+int mlx4_ib_resolve_grh(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah_attr,
+ u8 *mac, int *is_mcast)
+{
+ struct mlx4_ib_rdmaoe *rdmaoe = &dev->rdmaoe;
+ struct sockaddr_in6 dst = {0};
+ struct rdma_dev_addr addr;
+ struct resolve_ctx ctx;
+ struct net_device *netdev;
+ int err = 0;
+ int ifidx;
+
+ *is_mcast = 0;
+ spin_lock(&rdmaoe->lock);
+ netdev = rdmaoe->netdevs[ah_attr->port_num - 1];
+ if (!netdev) {
+ spin_unlock(&rdmaoe->lock);
+ return -EINVAL;
+ }
+ ifidx = netdev->ifindex;
+ spin_unlock(&rdmaoe->lock);
+
+ init_completion(&ctx.done);
+ memcpy(dst.sin6_addr.s6_addr, ah_attr->grh.dgid.raw, sizeof ah_attr->grh);
+ dst.sin6_family = AF_INET6;
+ dst.sin6_scope_id = ifidx;
+ if (rdma_link_local_addr(&dst.sin6_addr))
+ rdma_get_ll_mac(&dst.sin6_addr, mac);
+ else if (rdma_is_multicast_addr(&dst.sin6_addr)) {
+ rdma_get_mcast_mac(&dst.sin6_addr, mac);
+ *is_mcast = 1;
+ } else {
+ err = rdma_resolve_ip(&addr_client, NULL, (struct sockaddr *)&dst, &addr,
+ 2000, resolve_callback, &ctx);
+ if (!err)
+ wait_for_completion(&ctx.done);
+ else
+ ctx.status = err;
+
+ err = status2err(ctx.status);
}
- ah->av.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28);
+
+ return err;
+}
+
+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_rdmaoe_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);
+ if (err)
+ return ERR_PTR(err);
+
+ memcpy(ah->av.eth.mac_0_1, mac, 2);
+ memcpy(ah->av.eth.mac_2_5, mac + 2, 4);
+ ah->av.ib.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24));
+ ah->av.ib.g_slid = 0x80;
+ 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;
+ }
+
+ /*
+ * HW requires multicast LID so we just choose one.
+ */
+ if (is_mcast)
+ ah->av.ib.dlid = cpu_to_be16(0xc000);
+
+ memcpy(ah->av.ib.dgid, ah_attr->grh.dgid.raw, 16);
+ ah->av.ib.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;
+ enum ib_port_link_type link_type;
+ struct ib_ah *ret;
+
+ ah = kzalloc(sizeof *ah, GFP_ATOMIC);
+ if (!ah)
+ return ERR_PTR(-ENOMEM);
+
+ link_type = ib_get_port_link_type(pd->device, ah_attr->port_num);
+ if (link_type == PORT_LINK_ETH) {
+ if (!(ah_attr->ah_flags & IB_AH_GRH)) {
+ ret = ERR_PTR(-EINVAL);
+ goto out;
+ } 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_rdmaoe_ah(pd, ah_attr, ah);
+ if (IS_ERR(ret))
+ goto out;
+ else
+ return ret;
+ }
+ } else
+ return create_ib_ah(pd, ah_attr, ah); /* never fails */
+
+out:
+ kfree(ah);
+ return ret;
+}
+
int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
{
struct mlx4_ib_ah *ah = to_mah(ibah);
+ enum ib_port_link_type lt;
+ lt = ib_get_port_link_type(ibah->device, ah_attr->port_num);
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->dlid = lt == PORT_LINK_IB ? be16_to_cpu(ah->av.ib.dlid) : 0;
+ 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;
+ 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;
@@ -98,3 +235,30 @@ int mlx4_ib_destroy_ah(struct ib_ah *ah)
kfree(to_mah(ah));
return 0;
}
+
+int mlx4_ib_get_mac(struct ib_device *device, u8 port, u8 *gid, u8 *mac)
+{
+ int err;
+ struct mlx4_ib_dev *ibdev = to_mdev(device);
+ struct ib_ah_attr ah_attr = {
+ .port_num = port,
+ };
+ int is_mcast;
+
+ memcpy(ah_attr.grh.dgid.raw, gid, 16);
+ err = mlx4_ib_resolve_grh(ibdev, &ah_attr, mac, &is_mcast);
+ if (err)
+ ERR_PTR(err);
+
+ return 0;
+}
+
+void mlx4_ib_addr_init(void)
+{
+ rdma_addr_register_client(&addr_client);
+}
+
+void mlx4_ib_addr_cleanup(void)
+{
+ rdma_addr_unregister_client(&addr_client);
+}
diff --git a/drivers/infiniband/hw/mlx4/mlx4_ib.h b/drivers/infiniband/hw/mlx4/mlx4_ib.h
index 8a7dd67..e2d6e62 100644
--- a/drivers/infiniband/hw/mlx4/mlx4_ib.h
+++ b/drivers/infiniband/hw/mlx4/mlx4_ib.h
@@ -138,6 +138,7 @@ struct mlx4_ib_qp {
u8 resp_depth;
u8 sq_no_prefetch;
u8 state;
+ int mlx_type;
};
struct mlx4_ib_srq {
@@ -157,7 +158,15 @@ struct mlx4_ib_srq {
struct mlx4_ib_ah {
struct ib_ah ibah;
- struct mlx4_av av;
+ union mlx4_ext_av av;
+};
+
+struct mlx4_ib_rdmaoe {
+ spinlock_t lock;
+ struct net_device *netdevs[MLX4_MAX_PORTS];
+ int enstate[MLX4_MAX_PORTS];
+ int mtu[MLX4_MAX_PORTS];
+ struct notifier_block nb;
};
struct mlx4_ib_dev {
@@ -175,6 +184,8 @@ struct mlx4_ib_dev {
spinlock_t sm_lock;
struct mutex cap_mask_mutex;
+
+ struct mlx4_ib_rdmaoe rdmaoe;
};
static inline struct mlx4_ib_dev *to_mdev(struct ib_device *ibdev)
@@ -312,10 +323,25 @@ int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list, int npages,
u64 iova);
int mlx4_ib_unmap_fmr(struct list_head *fmr_list);
int mlx4_ib_fmr_dealloc(struct ib_fmr *fmr);
+void mlx4_ib_addr_init(void);
+void mlx4_ib_addr_cleanup(void);
+
+int mlx4_ib_resolve_grh(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah_attr,
+ u8 *mac, int *is_mcast);
+
+int mlx4_ib_get_mac(struct ib_device *device, u8 port, u8 *gid, u8 *mac);
static inline int mlx4_ib_ah_grh_present(struct mlx4_ib_ah *ah)
{
- return !!(ah->av.g_slid & 0x80);
+ /*
+ * port number is located at the same place for both IB and Eth
+ */
+ u8 port = (ah->av.ib.port_pd >> 24) & 3;
+
+ if (ib_get_port_link_type(ah->ibah.device, port) == PORT_LINK_ETH)
+ return 1;
+ else
+ return !!(ah->av.ib.g_slid & 0x80);
}
#endif /* MLX4_IB_H */
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 20724ae..7a6b765 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -32,6 +32,7 @@
*/
#include <linux/log2.h>
+#include <linux/netdevice.h>
#include <rdma/ib_cache.h>
#include <rdma/ib_pack.h>
@@ -47,14 +48,21 @@ enum {
enum {
MLX4_IB_DEFAULT_SCHED_QUEUE = 0x83,
- MLX4_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f
+ MLX4_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f,
+ MLX4_IB_LINK_TYPE_IB = 0,
+ MLX4_IB_LINK_TYPE_ETH = 1
};
enum {
/*
* Largest possible UD header: send with GRH and immediate data.
+ * 4 bytes added to accommodate for eth header instead of lrh
*/
- MLX4_IB_UD_HEADER_SIZE = 72
+ MLX4_IB_UD_HEADER_SIZE = 76
+};
+
+enum {
+ MLX4_RDMAOE_ETHERTYPE = 0x8915
};
struct mlx4_ib_sqp {
@@ -62,7 +70,10 @@ struct mlx4_ib_sqp {
int pkey_index;
u32 qkey;
u32 send_psn;
- struct ib_ud_header ud_header;
+ union {
+ struct ib_ud_header ib;
+ struct eth_ud_header eth;
+ } hdr;
u8 header_buf[MLX4_IB_UD_HEADER_SIZE];
};
@@ -782,18 +793,6 @@ int mlx4_ib_destroy_qp(struct ib_qp *qp)
return 0;
}
-static int to_mlx4_st(enum ib_qp_type type)
-{
- switch (type) {
- case IB_QPT_RC: return MLX4_QP_ST_RC;
- case IB_QPT_UC: return MLX4_QP_ST_UC;
- case IB_QPT_UD: return MLX4_QP_ST_UD;
- case IB_QPT_SMI:
- case IB_QPT_GSI: return MLX4_QP_ST_MLX;
- default: return -1;
- }
-}
-
static __be32 to_mlx4_access_flags(struct mlx4_ib_qp *qp, const struct ib_qp_attr *attr,
int attr_mask)
{
@@ -843,6 +842,12 @@ static void mlx4_set_sched(struct mlx4_qp_path *path, u8 port)
static int mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah,
struct mlx4_qp_path *path, u8 port)
{
+ int err;
+ int is_eth = ib_get_port_link_type(&dev->ib_dev, port) ==
+ PORT_LINK_ETH ? 1 : 0;
+ u8 mac[6];
+ int is_mcast;
+
path->grh_mylmc = ah->src_path_bits & 0x7f;
path->rlid = cpu_to_be16(ah->dlid);
if (ah->static_rate) {
@@ -873,9 +878,36 @@ static int mlx4_set_path(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah,
path->sched_queue = MLX4_IB_DEFAULT_SCHED_QUEUE |
((port - 1) << 6) | ((ah->sl & 0xf) << 2);
+ if (is_eth) {
+ if (!(ah->ah_flags & IB_AH_GRH))
+ return -1;
+
+ err = mlx4_ib_resolve_grh(dev, ah, mac, &is_mcast);
+ if (err)
+ return err;
+
+ memcpy(path->dmac_h, mac, 2);
+ memcpy(path->dmac_l, mac + 2, 4);
+ path->ackto = MLX4_IB_LINK_TYPE_ETH;
+ /* use index 0 into MAC table for RDMAoE */
+ path->grh_mylmc &= 0x80;
+ }
+
return 0;
}
+static int to_mlx4_st(enum ib_qp_type type)
+{
+ switch (type) {
+ case IB_QPT_RC: return MLX4_QP_ST_RC;
+ case IB_QPT_UC: return MLX4_QP_ST_UC;
+ case IB_QPT_UD: return MLX4_QP_ST_UD;
+ case IB_QPT_SMI:
+ case IB_QPT_GSI: return MLX4_QP_ST_MLX;
+ default: return -1;
+ }
+}
+
static int __mlx4_ib_modify_qp(struct ib_qp *ibqp,
const struct ib_qp_attr *attr, int attr_mask,
enum ib_qp_state cur_state, enum ib_qp_state new_state)
@@ -972,7 +1004,7 @@ static int __mlx4_ib_modify_qp(struct ib_qp *ibqp,
}
if (attr_mask & IB_QP_TIMEOUT) {
- context->pri_path.ackto = attr->timeout << 3;
+ context->pri_path.ackto |= (attr->timeout << 3);
optpar |= MLX4_QP_OPTPAR_ACK_TIMEOUT;
}
@@ -1206,8 +1238,8 @@ out:
return err;
}
-static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
- void *wqe, unsigned *mlx_seg_len)
+static int build_ib_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
+ void *wqe, unsigned *mlx_seg_len)
{
struct ib_device *ib_dev = &to_mdev(sqp->qp.ibqp.device)->ib_dev;
struct mlx4_wqe_mlx_seg *mlx = wqe;
@@ -1223,61 +1255,171 @@ static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
for (i = 0; i < wr->num_sge; ++i)
send_size += wr->sg_list[i].length;
- ib_ud_header_init(send_size, mlx4_ib_ah_grh_present(ah), &sqp->ud_header);
+ ib_ud_header_init(send_size, mlx4_ib_ah_grh_present(ah), &sqp->hdr.ib);
- sqp->ud_header.lrh.service_level =
- be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 28;
- sqp->ud_header.lrh.destination_lid = ah->av.dlid;
- sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.g_slid & 0x7f);
+ sqp->hdr.ib.lrh.service_level =
+ be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
+ sqp->hdr.ib.lrh.destination_lid = ah->av.ib.dlid;
+ sqp->hdr.ib.lrh.source_lid = cpu_to_be16(ah->av.ib.g_slid & 0x7f);
if (mlx4_ib_ah_grh_present(ah)) {
- sqp->ud_header.grh.traffic_class =
- (be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 20) & 0xff;
- sqp->ud_header.grh.flow_label =
- ah->av.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
- sqp->ud_header.grh.hop_limit = ah->av.hop_limit;
- ib_get_cached_gid(ib_dev, be32_to_cpu(ah->av.port_pd) >> 24,
- ah->av.gid_index, &sqp->ud_header.grh.source_gid);
- memcpy(sqp->ud_header.grh.destination_gid.raw,
- ah->av.dgid, 16);
+ sqp->hdr.ib.grh.traffic_class =
+ (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff;
+ sqp->hdr.ib.grh.flow_label =
+ ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
+ sqp->hdr.ib.grh.hop_limit = ah->av.ib.hop_limit;
+ ib_get_cached_gid(ib_dev, be32_to_cpu(ah->av.ib.port_pd) >> 24,
+ ah->av.ib.gid_index, &sqp->hdr.ib.grh.source_gid);
+ memcpy(sqp->hdr.ib.grh.destination_gid.raw,
+ ah->av.ib.dgid, 16);
}
mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) |
- (sqp->ud_header.lrh.destination_lid ==
+ (sqp->hdr.ib.lrh.destination_lid ==
IB_LID_PERMISSIVE ? MLX4_WQE_MLX_SLR : 0) |
- (sqp->ud_header.lrh.service_level << 8));
- mlx->rlid = sqp->ud_header.lrh.destination_lid;
+ (sqp->hdr.ib.lrh.service_level << 8));
+ mlx->rlid = sqp->hdr.ib.lrh.destination_lid;
+
+ switch (wr->opcode) {
+ case IB_WR_SEND:
+ sqp->hdr.ib.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
+ sqp->hdr.ib.immediate_present = 0;
+ break;
+ case IB_WR_SEND_WITH_IMM:
+ sqp->hdr.ib.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
+ sqp->hdr.ib.immediate_present = 1;
+ sqp->hdr.ib.immediate_data = wr->ex.imm_data;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ sqp->hdr.ib.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0;
+ if (sqp->hdr.ib.lrh.destination_lid == IB_LID_PERMISSIVE)
+ sqp->hdr.ib.lrh.source_lid = IB_LID_PERMISSIVE;
+ sqp->hdr.ib.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
+ if (!sqp->qp.ibqp.qp_num)
+ ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey);
+ else
+ ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey);
+ sqp->hdr.ib.bth.pkey = cpu_to_be16(pkey);
+ sqp->hdr.ib.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
+ sqp->hdr.ib.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
+ sqp->hdr.ib.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ?
+ sqp->qkey : wr->wr.ud.remote_qkey);
+ sqp->hdr.ib.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num);
+
+ header_size = ib_ud_header_pack(&sqp->hdr.ib, sqp->header_buf);
+
+ /*
+ * Inline data segments may not cross a 64 byte boundary. If
+ * our UD header is bigger than the space available up to the
+ * next 64 byte boundary in the WQE, use two inline data
+ * segments to hold the UD header.
+ */
+ spc = MLX4_INLINE_ALIGN -
+ ((unsigned long) (inl + 1) & (MLX4_INLINE_ALIGN - 1));
+ if (header_size <= spc) {
+ inl->byte_count = cpu_to_be32(1 << 31 | header_size);
+ memcpy(inl + 1, sqp->header_buf, header_size);
+ i = 1;
+ } else {
+ inl->byte_count = cpu_to_be32(1 << 31 | spc);
+ memcpy(inl + 1, sqp->header_buf, spc);
+
+ inl = (void *) (inl + 1) + spc;
+ memcpy(inl + 1, sqp->header_buf + spc, header_size - spc);
+ /*
+ * Need a barrier here to make sure all the data is
+ * visible before the byte_count field is set.
+ * Otherwise the HCA prefetcher could grab the 64-byte
+ * chunk with this inline segment and get a valid (!=
+ * 0xffffffff) byte count but stale data, and end up
+ * generating a packet with bad headers.
+ *
+ * The first inline segment's byte_count field doesn't
+ * need a barrier, because it comes after a
+ * control/MLX segment and therefore is at an offset
+ * of 16 mod 64.
+ */
+ wmb();
+ inl->byte_count = cpu_to_be32(1 << 31 | (header_size - spc));
+ i = 2;
+ }
+
+ *mlx_seg_len =
+ ALIGN(i * sizeof (struct mlx4_wqe_inline_seg) + header_size, 16);
+ return 0;
+}
+
+static int build_eth_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
+ void *wqe, unsigned *mlx_seg_len)
+{
+ struct ib_device *ib_dev = &to_mdev(sqp->qp.ibqp.device)->ib_dev;
+ struct mlx4_wqe_mlx_seg *mlx = wqe;
+ struct mlx4_wqe_inline_seg *inl = wqe + sizeof *mlx;
+ struct mlx4_ib_ah *ah = to_mah(wr->wr.ud.ah);
+ u16 pkey;
+ int send_size;
+ int header_size;
+ int spc;
+ int i;
+ void *tmp;
+
+ send_size = 0;
+ for (i = 0; i < wr->num_sge; ++i)
+ send_size += wr->sg_list[i].length;
+
+ ib_rdmaoe_ud_header_init(send_size, mlx4_ib_ah_grh_present(ah), &sqp->hdr.eth);
+
+ if (mlx4_ib_ah_grh_present(ah)) {
+ sqp->hdr.eth.grh.traffic_class =
+ (be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20) & 0xff;
+ sqp->hdr.eth.grh.flow_label =
+ ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
+ sqp->hdr.eth.grh.hop_limit = ah->av.ib.hop_limit;
+ ib_get_cached_gid(ib_dev, be32_to_cpu(ah->av.ib.port_pd) >> 24,
+ ah->av.ib.gid_index, &sqp->hdr.eth.grh.source_gid);
+ memcpy(sqp->hdr.eth.grh.destination_gid.raw,
+ ah->av.ib.dgid, 16);
+ }
+
+ mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
switch (wr->opcode) {
case IB_WR_SEND:
- sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
- sqp->ud_header.immediate_present = 0;
+ sqp->hdr.eth.bth.opcode = IB_OPCODE_UD_SEND_ONLY;
+ sqp->hdr.eth.immediate_present = 0;
break;
case IB_WR_SEND_WITH_IMM:
- sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
- sqp->ud_header.immediate_present = 1;
- sqp->ud_header.immediate_data = wr->ex.imm_data;
+ sqp->hdr.eth.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE;
+ sqp->hdr.eth.immediate_present = 1;
+ sqp->hdr.eth.immediate_data = wr->ex.imm_data;
break;
default:
return -EINVAL;
}
- sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0;
- if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE)
- sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE;
- sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
+ memcpy(sqp->hdr.eth.eth.dmac_h, ah->av.eth.mac_0_1, 2);
+ memcpy(sqp->hdr.eth.eth.dmac_h + 2, ah->av.eth.mac_2_5, 2);
+ memcpy(sqp->hdr.eth.eth.dmac_l, ah->av.eth.mac_2_5 + 2, 2);
+ tmp = to_mdev(sqp->qp.ibqp.device)->rdmaoe.netdevs[sqp->qp.port - 1]->dev_addr;
+ memcpy(sqp->hdr.eth.eth.smac_h, tmp, 2);
+ memcpy(sqp->hdr.eth.eth.smac_l, tmp + 2, 4);
+ sqp->hdr.eth.eth.type = cpu_to_be16(MLX4_RDMAOE_ETHERTYPE);
+ sqp->hdr.eth.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED);
if (!sqp->qp.ibqp.qp_num)
ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey);
else
ib_get_cached_pkey(ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey);
- sqp->ud_header.bth.pkey = cpu_to_be16(pkey);
- sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
- sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
- sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ?
+ sqp->hdr.eth.bth.pkey = cpu_to_be16(pkey);
+ sqp->hdr.eth.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn);
+ sqp->hdr.eth.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1));
+ sqp->hdr.eth.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ?
sqp->qkey : wr->wr.ud.remote_qkey);
- sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num);
+ sqp->hdr.eth.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num);
- header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf);
+ header_size = rdmaoe_ud_header_pack(&sqp->hdr.eth, sqp->header_buf);
if (0) {
printk(KERN_ERR "built UD header of size %d:\n", header_size);
@@ -1333,6 +1475,15 @@ static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
return 0;
}
+static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
+ void *wqe, unsigned *mlx_seg_len)
+{
+ if (ib_get_port_link_type(sqp->qp.ibqp.device, sqp->qp.port) == PORT_LINK_IB)
+ return build_ib_mlx_header(sqp, wr, wqe, mlx_seg_len);
+ else
+ return build_eth_mlx_header(sqp, wr, wqe, mlx_seg_len);
+}
+
static int mlx4_wq_overflow(struct mlx4_ib_wq *wq, int nreq, struct ib_cq *ib_cq)
{
unsigned cur;
@@ -1414,6 +1565,8 @@ static void set_datagram_seg(struct mlx4_wqe_datagram_seg *dseg,
memcpy(dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof (struct mlx4_av));
dseg->dqpn = cpu_to_be32(wr->wr.ud.remote_qpn);
dseg->qkey = cpu_to_be32(wr->wr.ud.remote_qkey);
+ dseg->vlan = to_mah(wr->wr.ud.ah)->av.eth.vlan;
+ memcpy(dseg->mac_0_1, to_mah(wr->wr.ud.ah)->av.eth.mac_0_1, 6);
}
static void set_mlx_icrc_seg(void *dseg)
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 3aff8a6..b73b5f0 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -66,7 +66,8 @@ enum {
MLX4_DEV_CAP_FLAG_ATOMIC = 1 << 18,
MLX4_DEV_CAP_FLAG_RAW_MCAST = 1 << 19,
MLX4_DEV_CAP_FLAG_UD_AV_PORT = 1 << 20,
- MLX4_DEV_CAP_FLAG_UD_MCAST = 1 << 21
+ MLX4_DEV_CAP_FLAG_UD_MCAST = 1 << 21,
+ MLX4_DEV_CAP_FLAG_RDMAOE = 1 << 30
};
enum {
@@ -371,6 +372,28 @@ struct mlx4_av {
u8 dgid[16];
};
+struct mlx4_eth_av {
+ __be32 port_pd;
+ u8 reserved1;
+ u8 smac_idx;
+ u16 reserved2;
+ u8 reserved3;
+ u8 gid_index;
+ u8 stat_rate;
+ u8 hop_limit;
+ __be32 sl_tclass_flowlabel;
+ u8 dgid[16];
+ u32 reserved4[2];
+ __be16 vlan;
+ u8 mac_0_1[2];
+ u8 mac_2_5[4];
+};
+
+union mlx4_ext_av {
+ struct mlx4_av ib;
+ struct mlx4_eth_av eth;
+};
+
struct mlx4_dev {
struct pci_dev *pdev;
unsigned long flags;
@@ -399,6 +422,12 @@ struct mlx4_init_port_param {
if (((type) == MLX4_PORT_TYPE_IB ? (dev)->caps.port_mask : \
~(dev)->caps.port_mask) & 1 << ((port) - 1))
+#define mlx4_foreach_ib_transport_port(port, dev) \
+ for ((port) = 1; (port) <= (dev)->caps.num_ports; (port)++) \
+ if (((dev)->caps.port_mask & 1 << ((port) - 1)) || \
+ ((dev)->caps.flags & MLX4_DEV_CAP_FLAG_RDMAOE))
+
+
int mlx4_buf_alloc(struct mlx4_dev *dev, int size, int max_direct,
struct mlx4_buf *buf);
void mlx4_buf_free(struct mlx4_dev *dev, int size, struct mlx4_buf *buf);
diff --git a/include/linux/mlx4/qp.h b/include/linux/mlx4/qp.h
index bf8f119..d73534f 100644
--- a/include/linux/mlx4/qp.h
+++ b/include/linux/mlx4/qp.h
@@ -112,7 +112,9 @@ struct mlx4_qp_path {
u8 snooper_flags;
u8 reserved3[2];
u8 counter_index;
- u8 reserved4[7];
+ u8 reserved4;
+ u8 dmac_h[2];
+ u8 dmac_l[4];
};
struct mlx4_qp_context {
@@ -218,7 +220,9 @@ struct mlx4_wqe_datagram_seg {
__be32 av[8];
__be32 dqpn;
__be32 qkey;
- __be32 reservd[2];
+ __be16 vlan;
+ u8 mac_0_1[2];
+ u8 mac_2_5[4];
};
struct mlx4_wqe_lso_seg {
--
1.6.3.3
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