From: Ron Livne Date: Tue, 15 Jul 2008 06:48:48 +0000 (-0700) Subject: IB/mlx4: Add support for blocking multicast loopback packets X-Git-Tag: v2.6.27-rc1~1090^2~26 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=521e575b9a7324a0bca762622139f69582a042bf;p=linux-2.6 IB/mlx4: Add support for blocking multicast loopback packets Add support for handling the IB_QP_CREATE_MULTICAST_BLOCK_LOOPBACK flag by using the per-multicast group loopback blocking feature of mlx4 hardware. Signed-off-by: Ron Livne Signed-off-by: Roland Dreier --- diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c index 4d61e32866..bcf50648fa 100644 --- a/drivers/infiniband/hw/mlx4/main.c +++ b/drivers/infiniband/hw/mlx4/main.c @@ -90,7 +90,8 @@ static int mlx4_ib_query_device(struct ib_device *ibdev, props->device_cap_flags = IB_DEVICE_CHANGE_PHY_PORT | IB_DEVICE_PORT_ACTIVE_EVENT | IB_DEVICE_SYS_IMAGE_GUID | - IB_DEVICE_RC_RNR_NAK_GEN; + IB_DEVICE_RC_RNR_NAK_GEN | + IB_DEVICE_BLOCK_MULTICAST_LOOPBACK; if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BAD_PKEY_CNTR) props->device_cap_flags |= IB_DEVICE_BAD_PKEY_CNTR; if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BAD_QKEY_CNTR) @@ -437,7 +438,9 @@ static int mlx4_ib_dealloc_pd(struct ib_pd *pd) static int mlx4_ib_mcg_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid) { return mlx4_multicast_attach(to_mdev(ibqp->device)->dev, - &to_mqp(ibqp)->mqp, gid->raw); + &to_mqp(ibqp)->mqp, gid->raw, + !!(to_mqp(ibqp)->flags & + MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK)); } static int mlx4_ib_mcg_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid) diff --git a/drivers/infiniband/hw/mlx4/mlx4_ib.h b/drivers/infiniband/hw/mlx4/mlx4_ib.h index 5cf994794d..c4cf5b69ee 100644 --- a/drivers/infiniband/hw/mlx4/mlx4_ib.h +++ b/drivers/infiniband/hw/mlx4/mlx4_ib.h @@ -101,7 +101,8 @@ struct mlx4_ib_wq { }; enum mlx4_ib_qp_flags { - MLX4_IB_QP_LSO = 1 << 0 + MLX4_IB_QP_LSO = 1 << 0, + MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK = 1 << 1, }; struct mlx4_ib_qp { diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c index 44bbd6c2e3..91590e7fba 100644 --- a/drivers/infiniband/hw/mlx4/qp.c +++ b/drivers/infiniband/hw/mlx4/qp.c @@ -511,6 +511,9 @@ static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd, } else { qp->sq_no_prefetch = 0; + if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK) + qp->flags |= MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK; + if (init_attr->create_flags & IB_QP_CREATE_IPOIB_UD_LSO) qp->flags |= MLX4_IB_QP_LSO; @@ -684,10 +687,15 @@ struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd, struct mlx4_ib_qp *qp; int err; - /* We only support LSO, and only for kernel UD QPs. */ - if (init_attr->create_flags & ~IB_QP_CREATE_IPOIB_UD_LSO) + /* + * We only support LSO and multicast loopback blocking, and + * only for kernel UD QPs. + */ + if (init_attr->create_flags & ~(IB_QP_CREATE_IPOIB_UD_LSO | + IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK)) return ERR_PTR(-EINVAL); - if (init_attr->create_flags & IB_QP_CREATE_IPOIB_UD_LSO && + + if (init_attr->create_flags && (pd->uobject || init_attr->qp_type != IB_QPT_UD)) return ERR_PTR(-EINVAL); @@ -1844,6 +1852,13 @@ done: qp_init_attr->cap = qp_attr->cap; + qp_init_attr->create_flags = 0; + if (qp->flags & MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK) + qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK; + + if (qp->flags & MLX4_IB_QP_LSO) + qp_init_attr->create_flags |= IB_QP_CREATE_IPOIB_UD_LSO; + out: mutex_unlock(&qp->mutex); return err; diff --git a/drivers/net/mlx4/mcg.c b/drivers/net/mlx4/mcg.c index 57f7f1f0d4..b4b57870dd 100644 --- a/drivers/net/mlx4/mcg.c +++ b/drivers/net/mlx4/mcg.c @@ -38,6 +38,9 @@ #include "mlx4.h" +#define MGM_QPN_MASK 0x00FFFFFF +#define MGM_BLCK_LB_BIT 30 + struct mlx4_mgm { __be32 next_gid_index; __be32 members_count; @@ -153,7 +156,8 @@ static int find_mgm(struct mlx4_dev *dev, return err; } -int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16]) +int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16], + int block_mcast_loopback) { struct mlx4_priv *priv = mlx4_priv(dev); struct mlx4_cmd_mailbox *mailbox; @@ -202,13 +206,18 @@ int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16]) } for (i = 0; i < members_count; ++i) - if (mgm->qp[i] == cpu_to_be32(qp->qpn)) { + if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qp->qpn) { mlx4_dbg(dev, "QP %06x already a member of MGM\n", qp->qpn); err = 0; goto out; } - mgm->qp[members_count++] = cpu_to_be32(qp->qpn); + if (block_mcast_loopback) + mgm->qp[members_count++] = cpu_to_be32((qp->qpn & MGM_QPN_MASK) | + (1 << MGM_BLCK_LB_BIT)); + else + mgm->qp[members_count++] = cpu_to_be32(qp->qpn & MGM_QPN_MASK); + mgm->members_count = cpu_to_be32(members_count); err = mlx4_WRITE_MCG(dev, index, mailbox); @@ -283,7 +292,7 @@ int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16]) members_count = be32_to_cpu(mgm->members_count); for (loc = -1, i = 0; i < members_count; ++i) - if (mgm->qp[i] == cpu_to_be32(qp->qpn)) + if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qp->qpn) loc = i; if (loc == -1) { diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h index a744383d16..81b3dd5206 100644 --- a/include/linux/mlx4/device.h +++ b/include/linux/mlx4/device.h @@ -398,7 +398,8 @@ int mlx4_srq_query(struct mlx4_dev *dev, struct mlx4_srq *srq, int *limit_waterm 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 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 mlx4_map_phys_fmr(struct mlx4_dev *dev, struct mlx4_fmr *fmr, u64 *page_list,