[ewg] [PATCH v3] MLX4: RAW ETH support

Alekseys Senin alekseys at voltaire.com
Mon Jun 14 00:52:36 PDT 2010


    This patch adds RAW ETH support to mlx4 driver.

diff --git a/kernel_patches/fixes/mlx4_x_0050_raw_eth.patch b/kernel_patches/fixes/mlx4_x_0050_raw_eth.patch
new file mode 100644
index 0000000..66a1c54
--- /dev/null
+++ b/kernel_patches/fixes/mlx4_x_0050_raw_eth.patch
@@ -0,0 +1,251 @@
+Add RAW ETH QP support to Mellanox adapters
+This patch relies on the RAW ETH patch to the ib core.
+
+Signed-off-by: Aleksey Senin <alekseys at voltaire.com>
+---
+ drivers/infiniband/hw/mlx4/main.c |   13 +++++++++----
+ drivers/infiniband/hw/mlx4/qp.c   |   22 ++++++++++++++++++----
+ drivers/net/mlx4/mcg.c            |   22 +++++++++++++---------
+ include/linux/mlx4/device.h       |    7 +++++--
+ include/linux/mlx4/driver.h       |    5 +++++
+ 5 files changed, 50 insertions(+), 19 deletions(-)
+
+diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
+index c146b84..43d0ccc 100644
+--- a/drivers/infiniband/hw/mlx4/main.c
++++ b/drivers/infiniband/hw/mlx4/main.c
+@@ -684,7 +684,9 @@ static int mlx4_ib_mcg_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
+ 	struct mlx4_ib_qp *mqp = to_mqp(ibqp);
+ 
+ 	err = mlx4_multicast_attach(mdev->dev, &mqp->mqp, gid->raw, !!(mqp->flags &
+-				    MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK));
++				MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK),
++				(ibqp->qp_type == IB_QPT_RAW_ETH) ?
++				MLX4_MCAST_PROT_EN : MLX4_MCAST_PROT_IB);
+ 	if (err)
+ 		return err;
+ 
+@@ -695,7 +697,9 @@ static int mlx4_ib_mcg_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
+ 	return 0;
+ 
+ err_add:
+-	mlx4_multicast_detach(mdev->dev, &mqp->mqp, gid->raw);
++	mlx4_multicast_detach(mdev->dev, &mqp->mqp, gid->raw,
++				(ibqp->qp_type == IB_QPT_RAW_ETH) ?
++				MLX4_MCAST_PROT_EN : MLX4_MCAST_PROT_IB);
+ 	return err;
+ }
+ 
+@@ -724,8 +728,9 @@ static int mlx4_ib_mcg_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
+ 	struct net_device *ndev;
+ 	struct gid_entry *ge;
+ 
+-	err = mlx4_multicast_detach(mdev->dev,
+-				    &mqp->mqp, gid->raw);
++	err = mlx4_multicast_detach(mdev->dev, &mqp->mqp, gid->raw,
++				(ibqp->qp_type == IB_QPT_RAW_ETH) ?
++				MLX4_MCAST_PROT_EN : MLX4_MCAST_PROT_IB);
+ 	if (err)
+ 		return err;
+ 
+diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
+index 422d367..c50e110 100644
+--- a/drivers/infiniband/hw/mlx4/qp.c
++++ b/drivers/infiniband/hw/mlx4/qp.c
+@@ -811,6 +811,7 @@ struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd,
+ 	case IB_QPT_RC:
+ 	case IB_QPT_UC:
+ 	case IB_QPT_UD:
++	case IB_QPT_RAW_ETH:
+ 	{
+ 		qp = kzalloc(sizeof *qp, GFP_KERNEL);
+ 		if (!qp)
+@@ -902,6 +903,7 @@ static int to_mlx4_st(enum ib_qp_type type)
+ 	case IB_QPT_RAW_ETY:
+ 	case IB_QPT_SMI:
+ 	case IB_QPT_GSI:	return MLX4_QP_ST_MLX;
++	case IB_QPT_RAW_ETH:	return MLX4_QP_ST_MLX;
+ 	default:		return -1;
+ 	}
+ }
+@@ -1064,8 +1066,9 @@ static int __mlx4_ib_modify_qp(struct ib_qp *ibqp,
+ 			break;
+ 		}
+ 	}
+-
+-	if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
++	if (ibqp->qp_type == IB_QPT_RAW_ETH)
++		context->mtu_msgmax = 0xff;
++	else if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
+ 	    ibqp->qp_type == IB_QPT_RAW_ETY)
+ 		context->mtu_msgmax = (IB_MTU_4096 << 5) | 11;
+ 	else if (ibqp->qp_type == IB_QPT_UD) {
+@@ -1237,7 +1240,8 @@ static int __mlx4_ib_modify_qp(struct ib_qp *ibqp,
+ 	if (cur_state == IB_QPS_INIT &&
+ 	    new_state == IB_QPS_RTR  &&
+ 	    (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI ||
+-	     ibqp->qp_type == IB_QPT_UD || ibqp->qp_type == IB_QPT_RAW_ETY)) {
++	     ibqp->qp_type == IB_QPT_UD || ibqp->qp_type == IB_QPT_RAW_ETY ||
++		ibqp->qp_type == IB_QPT_RAW_ETH)) {
+ 		context->pri_path.sched_queue = (qp->port - 1) << 6;
+ 		if (is_qp0(dev, qp))
+ 			context->pri_path.sched_queue |= MLX4_IB_DEFAULT_QP0_SCHED_QUEUE;
+@@ -1356,7 +1360,7 @@ int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ 		goto out;
+ 	}
+ 
+-	if ((attr_mask & IB_QP_PORT) &&
++	if ((attr_mask & IB_QP_PORT) && (ibqp->qp_type != IB_QPT_RAW_ETH) &&
+ 	    (attr->port_num == 0 || attr->port_num > dev->num_ports)) {
+ 		mlx4_ib_dbg("qpn 0x%x: invalid port number (%d) specified "
+ 			    "for transition %d to %d. qp_type %d",
+@@ -1365,6 +1369,16 @@ int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ 		goto out;
+ 	}
+ 
++	if ((attr_mask & IB_QP_PORT) && (ibqp->qp_type == IB_QPT_RAW_ETH) &&
++		(rdma_port_link_layer(&dev->ib_dev, attr->port_num)
++				!= IB_LINK_LAYER_ETHERNET)) {
++		mlx4_ib_dbg("qpn 0x%x: invalid port (%d) specified (not RDMAoE)"
++			    "for transition %d to %d. qp_type %d",
++			    ibqp->qp_num, attr->port_num, cur_state,
++			    new_state, ibqp->qp_type);
++		goto out;
++	}
++
+ 	if (attr_mask & IB_QP_PKEY_INDEX) {
+ 		int p = attr_mask & IB_QP_PORT ? attr->port_num : qp->port;
+ 		if (attr->pkey_index >= dev->dev->caps.pkey_table_len[p]) {
+diff --git a/drivers/net/mlx4/mcg.c b/drivers/net/mlx4/mcg.c
+index 61c1e40..e52063f 100644
+--- a/drivers/net/mlx4/mcg.c
++++ b/drivers/net/mlx4/mcg.c
+@@ -36,6 +36,7 @@
+ #include <linux/slab.h>
+ 
+ #include <linux/mlx4/cmd.h>
++#include <linux/mlx4/driver.h>
+ 
+ #include "mlx4.h"
+ 
+@@ -97,7 +98,8 @@ static int mlx4_MGID_HASH(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox
+  * entry in hash chain and *mgm holds end of hash chain.
+  */
+ static int find_mgm(struct mlx4_dev *dev,
+-		    u8 *gid, struct mlx4_cmd_mailbox *mgm_mailbox,
++		    u8 *gid, enum mlx4_mcast_prot prot,
++		    struct mlx4_cmd_mailbox *mgm_mailbox,
+ 		    u16 *hash, int *prev, int *index)
+ {
+ 	struct mlx4_cmd_mailbox *mailbox;
+@@ -146,8 +148,9 @@ static int find_mgm(struct mlx4_dev *dev,
+ 			return err;
+ 		}
+ 
+-		if (!memcmp(mgm->gid, gid, 16))
+-			return err;
++		if (!memcmp(mgm->gid, gid, 16) &&
++				(prot == be32_to_cpu(mgm->members_count) >> 30))
++				return err;
+ 
+ 		*prev = *index;
+ 		*index = be32_to_cpu(mgm->next_gid_index) >> 6;
+@@ -158,7 +161,7 @@ static int find_mgm(struct mlx4_dev *dev,
+ }
+ 
+ int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
+-			  int block_mcast_loopback)
++			  int block_mcast_loopback, enum mlx4_mcast_prot prot)
+ {
+ 	struct mlx4_priv *priv = mlx4_priv(dev);
+ 	struct mlx4_cmd_mailbox *mailbox;
+@@ -177,7 +180,7 @@ int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
+ 
+ 	mutex_lock(&priv->mcg_table.mutex);
+ 
+-	err = find_mgm(dev, gid, mailbox, &hash, &prev, &index);
++	err = find_mgm(dev, gid, prot, mailbox, &hash, &prev, &index);
+ 	if (err)
+ 		goto out;
+ 
+@@ -216,7 +219,7 @@ int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
+ 	mgm->qp[members_count++] = cpu_to_be32((qp->qpn & MGM_QPN_MASK) |
+ 					       (!!mlx4_blck_lb << MGM_BLCK_LB_BIT));
+ 
+-	mgm->members_count       = cpu_to_be32(members_count);
++	mgm->members_count = cpu_to_be32(members_count | ((u32) prot << 30));
+ 
+ 	err = mlx4_WRITE_MCG(dev, index, mailbox);
+ 	if (err)
+@@ -251,7 +254,8 @@ out:
+ }
+ EXPORT_SYMBOL_GPL(mlx4_multicast_attach);
+ 
+-int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16])
++int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
++						enum mlx4_mcast_prot prot)
+ {
+ 	struct mlx4_priv *priv = mlx4_priv(dev);
+ 	struct mlx4_cmd_mailbox *mailbox;
+@@ -269,7 +273,7 @@ int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16])
+ 
+ 	mutex_lock(&priv->mcg_table.mutex);
+ 
+-	err = find_mgm(dev, gid, mailbox, &hash, &prev, &index);
++	err = find_mgm(dev, gid, prot, mailbox, &hash, &prev, &index);
+ 	if (err)
+ 		goto out;
+ 
+@@ -300,7 +304,7 @@ int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16])
+ 	}
+ 
+ 
+-	mgm->members_count = cpu_to_be32(--members_count);
++	mgm->members_count = cpu_to_be32(--members_count | ((u32) prot << 30));
+ 	mgm->qp[loc]       = mgm->qp[i - 1];
+ 	mgm->qp[i - 1]     = 0;
+ 
+diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
+index 782a9b5..b57c0ac 100644
+--- a/include/linux/mlx4/device.h
++++ b/include/linux/mlx4/device.h
+@@ -39,6 +39,8 @@
+ 
+ #include <asm/atomic.h>
+ 
++#include <linux/mlx4/driver.h>
++
+ enum {
+ 	MLX4_FLAG_MSI_X		= 1 << 0,
+ 	MLX4_FLAG_OLD_PORT_CMDS	= 1 << 1,
+@@ -561,8 +563,9 @@ int mlx4_INIT_PORT(struct mlx4_dev *dev, int port);
+ int mlx4_CLOSE_PORT(struct mlx4_dev *dev, int port);
+ 
+ int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
+-			  int block_mcast_loopback);
+-int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16]);
++			  int block_mcast_loopback, enum mlx4_mcast_prot prot);
++int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
++				enum mlx4_mcast_prot prot);
+ 
+ int mlx4_register_mac(struct mlx4_dev *dev, u8 port, u64 mac, int *index);
+ void mlx4_unregister_mac(struct mlx4_dev *dev, u8 port, int index);
+diff --git a/include/linux/mlx4/driver.h b/include/linux/mlx4/driver.h
+index 94c9617..292e20b 100644
+--- a/include/linux/mlx4/driver.h
++++ b/include/linux/mlx4/driver.h
+@@ -54,6 +54,11 @@ enum mlx4_prot {
+ 	MLX4_PROT_EN,
+ };
+ 
++enum mlx4_mcast_prot {
++	MLX4_MCAST_PROT_IB = 0,
++	MLX4_MCAST_PROT_EN = 1,
++};
++
+ struct mlx4_interface {
+ 	void *			(*add)	 (struct mlx4_dev *dev);
+ 	void			(*remove)(struct mlx4_dev *dev, void *context);
+-- 
+1.6.5.2
+




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