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IB/mlx4: Add support for IBoE

Browse Source 
Add support for IBoE to mlx4_ib.  The bulk of the code is handling the
new address vector fields; mlx4 needs the MAC address of a remote node
to include it in a WQE (for datagrams) or in the QP context (for
connected QPs).  Address resolution is done by assuming all unicast
GIDs are either link-local IPv6 addresses.

Multicast group attach/detach needs to update the NIC's multicast
filters; but since attaching a QP to a multicast group can be done
before the QP is bound to a port, for IBoE we need to keep track of
all multicast groups that a QP is attached too before it transitions
from INIT to RTR (since it does not have a port in the INIT state).

Signed-off-by: Eli Cohen <eli@mellanox.co.il>

[ Many things cleaned up and otherwise monkeyed with; hope I didn't
  introduce too many bugs.  - Roland ]

Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Eli Cohen 2010-10-24 21:08:52 -07:00 committed by Roland Dreier
parent 7ac870ed7d
commit fa417f7b52
6 changed files with 716 additions and 110 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

157
drivers/infiniband/hw/mlx4/ah.c
View File

@ -30,66 +30,153 @@
* 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 in6_addr in6;
*is_mcast = 0;
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;
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;
struct mlx4_ib_ah *ah;
ah = kmalloc(sizeof *ah, GFP_ATOMIC);
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.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.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);
memset(&ah->av, 0, sizeof ah->av);
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);
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 |=
cpu_to_be32((ah_attr->grh.traffic_class << 20) |
ah_attr->grh.flow_label);
memcpy(ah->av.dgid, ah_attr->grh.dgid.raw, 16);
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);
}
return &ah->ibah;
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;

10
drivers/infiniband/hw/mlx4/mad.c
View File

@ -311,9 +311,12 @@ int mlx4_ib_mad_init(struct mlx4_ib_dev *dev)
struct ib_mad_agent *agent;
int p, q;
int ret;
enum rdma_link_layer ll;
for (p = 0; p < dev->num_ports; ++p)
for (p = 0; p < dev->num_ports; ++p) {
ll = rdma_port_get_link_layer(&dev->ib_dev, p + 1);
for (q = 0; q <= 1; ++q) {
if (ll == IB_LINK_LAYER_INFINIBAND) {
agent = ib_register_mad_agent(&dev->ib_dev, p + 1,
q ? IB_QPT_GSI : IB_QPT_SMI,
NULL, 0, send_handler,
@ -323,6 +326,9 @@ int mlx4_ib_mad_init(struct mlx4_ib_dev *dev)
goto err;
}
dev->send_agent[p][q] = agent;
} else
dev->send_agent[p][q] = NULL;
}
}
return 0;
@ -344,9 +350,11 @@ void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev)
for (p = 0; p < dev->num_ports; ++p) {
for (q = 0; q <= 1; ++q) {
agent = dev->send_agent[p][q];
if (agent) {
dev->send_agent[p][q] = NULL;
ib_unregister_mad_agent(agent);
}
}
if (dev->sm_ah[p])
ib_destroy_ah(dev->sm_ah[p]);

440
drivers/infiniband/hw/mlx4/main.c
View File

@ -35,9 +35,13 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/rtnetlink.h>
#include <rdma/ib_smi.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_addr.h>
#include <linux/mlx4/driver.h>
#include <linux/mlx4/cmd.h>
@ -58,6 +62,15 @@ static const char mlx4_ib_version[] =
DRV_NAME ": Mellanox ConnectX InfiniBand driver v"
DRV_VERSION " (" DRV_RELDATE ")\n";
struct update_gid_work {
struct work_struct work;
union ib_gid gids[128];
struct mlx4_ib_dev *dev;
int port;
};
static struct workqueue_struct *wq;
static void init_query_mad(struct ib_smp *mad)
{
mad->base_version = 1;
@ -154,6 +167,87 @@ static int mlx4_ib_query_device(struct ib_device *ibdev,
return err;
}
static enum rdma_link_layer
mlx4_ib_port_link_layer(struct ib_device *device, u8 port_num)
{
struct mlx4_dev *dev = to_mdev(device)->dev;
return dev->caps.port_mask & (1 << (port_num - 1)) ?
IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
}
static int ib_link_query_port(struct ib_device *ibdev, u8 port,
struct ib_port_attr *props,
struct ib_smp *out_mad)
{
props->lid = be16_to_cpup((__be16 *) (out_mad->data + 16));
props->lmc = out_mad->data[34] & 0x7;
props->sm_lid = be16_to_cpup((__be16 *) (out_mad->data + 18));
props->sm_sl = out_mad->data[36] & 0xf;
props->state = out_mad->data[32] & 0xf;
props->phys_state = out_mad->data[33] >> 4;
props->port_cap_flags = be32_to_cpup((__be32 *) (out_mad->data + 20));
props->gid_tbl_len = to_mdev(ibdev)->dev->caps.gid_table_len[port];
props->max_msg_sz = to_mdev(ibdev)->dev->caps.max_msg_sz;
props->pkey_tbl_len = to_mdev(ibdev)->dev->caps.pkey_table_len[port];
props->bad_pkey_cntr = be16_to_cpup((__be16 *) (out_mad->data + 46));
props->qkey_viol_cntr = be16_to_cpup((__be16 *) (out_mad->data + 48));
props->active_width = out_mad->data[31] & 0xf;
props->active_speed = out_mad->data[35] >> 4;
props->max_mtu = out_mad->data[41] & 0xf;
props->active_mtu = out_mad->data[36] >> 4;
props->subnet_timeout = out_mad->data[51] & 0x1f;
props->max_vl_num = out_mad->data[37] >> 4;
props->init_type_reply = out_mad->data[41] >> 4;
return 0;
}
static u8 state_to_phys_state(enum ib_port_state state)
{
return state == IB_PORT_ACTIVE ? 5 : 3;
}
static int eth_link_query_port(struct ib_device *ibdev, u8 port,
struct ib_port_attr *props,
struct ib_smp *out_mad)
{
struct mlx4_ib_iboe *iboe = &to_mdev(ibdev)->iboe;
struct net_device *ndev;
enum ib_mtu tmp;
props->active_width = IB_WIDTH_4X;
props->active_speed = 4;
props->port_cap_flags = IB_PORT_CM_SUP;
props->gid_tbl_len = to_mdev(ibdev)->dev->caps.gid_table_len[port];
props->max_msg_sz = to_mdev(ibdev)->dev->caps.max_msg_sz;
props->pkey_tbl_len = 1;
props->bad_pkey_cntr = be16_to_cpup((__be16 *) (out_mad->data + 46));
props->qkey_viol_cntr = be16_to_cpup((__be16 *) (out_mad->data + 48));
props->max_mtu = IB_MTU_2048;
props->subnet_timeout = 0;
props->max_vl_num = out_mad->data[37] >> 4;
props->init_type_reply = 0;
props->state = IB_PORT_DOWN;
props->phys_state = state_to_phys_state(props->state);
props->active_mtu = IB_MTU_256;
spin_lock(&iboe->lock);
ndev = iboe->netdevs[port - 1];
if (!ndev)
goto out;
tmp = iboe_get_mtu(ndev->mtu);
props->active_mtu = tmp ? min(props->max_mtu, tmp) : IB_MTU_256;
props->state = netif_running(ndev) && netif_oper_up(ndev) ?
IB_PORT_ACTIVE : IB_PORT_DOWN;
props->phys_state = state_to_phys_state(props->state);
out:
spin_unlock(&iboe->lock);
return 0;
}
static int mlx4_ib_query_port(struct ib_device *ibdev, u8 port,
struct ib_port_attr *props)
{
@ -176,25 +270,9 @@ static int mlx4_ib_query_port(struct ib_device *ibdev, u8 port,
if (err)
goto out;
props->lid = be16_to_cpup((__be16 *) (out_mad->data + 16));
props->lmc = out_mad->data[34] & 0x7;
props->sm_lid = be16_to_cpup((__be16 *) (out_mad->data + 18));
props->sm_sl = out_mad->data[36] & 0xf;
props->state = out_mad->data[32] & 0xf;
props->phys_state = out_mad->data[33] >> 4;
props->port_cap_flags = be32_to_cpup((__be32 *) (out_mad->data + 20));
props->gid_tbl_len = to_mdev(ibdev)->dev->caps.gid_table_len[port];
props->max_msg_sz = to_mdev(ibdev)->dev->caps.max_msg_sz;
props->pkey_tbl_len = to_mdev(ibdev)->dev->caps.pkey_table_len[port];
props->bad_pkey_cntr = be16_to_cpup((__be16 *) (out_mad->data + 46));
props->qkey_viol_cntr = be16_to_cpup((__be16 *) (out_mad->data + 48));
props->active_width = out_mad->data[31] & 0xf;
props->active_speed = out_mad->data[35] >> 4;
props->max_mtu = out_mad->data[41] & 0xf;
props->active_mtu = out_mad->data[36] >> 4;
props->subnet_timeout = out_mad->data[51] & 0x1f;
props->max_vl_num = out_mad->data[37] >> 4;
props->init_type_reply = out_mad->data[41] >> 4;
err = mlx4_ib_port_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND ?
ib_link_query_port(ibdev, port, props, out_mad) :
eth_link_query_port(ibdev, port, props, out_mad);
out:
kfree(in_mad);
@ -203,7 +281,7 @@ static int mlx4_ib_query_port(struct ib_device *ibdev, u8 port,
return err;
}
static int mlx4_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
static int __mlx4_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
union ib_gid *gid)
{
struct ib_smp *in_mad = NULL;
@ -241,6 +319,25 @@ static int mlx4_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
return err;
}
static int iboe_query_gid(struct ib_device *ibdev, u8 port, int index,
union ib_gid *gid)
{
struct mlx4_ib_dev *dev = to_mdev(ibdev);
*gid = dev->iboe.gid_table[port - 1][index];
return 0;
}
static int mlx4_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
union ib_gid *gid)
{
if (rdma_port_get_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND)
return __mlx4_ib_query_gid(ibdev, port, index, gid);
else
return iboe_query_gid(ibdev, port, index, gid);
}
static int mlx4_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
u16 *pkey)
{
@ -289,6 +386,7 @@ static int mlx4_SET_PORT(struct mlx4_ib_dev *dev, u8 port, int reset_qkey_viols,
{
struct mlx4_cmd_mailbox *mailbox;
int err;
u8 is_eth = dev->dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH;
mailbox = mlx4_alloc_cmd_mailbox(dev->dev);
if (IS_ERR(mailbox))
@ -304,7 +402,7 @@ static int mlx4_SET_PORT(struct mlx4_ib_dev *dev, u8 port, int reset_qkey_viols,
((__be32 *) mailbox->buf)[1] = cpu_to_be32(cap_mask);
}
err = mlx4_cmd(dev->dev, mailbox->dma, port, 0, MLX4_CMD_SET_PORT,
err = mlx4_cmd(dev->dev, mailbox->dma, port, is_eth, MLX4_CMD_SET_PORT,
MLX4_CMD_TIME_CLASS_B);
mlx4_free_cmd_mailbox(dev->dev, mailbox);
@ -447,18 +545,132 @@ static int mlx4_ib_dealloc_pd(struct ib_pd *pd)
return 0;
}
static int add_gid_entry(struct ib_qp *ibqp, union ib_gid *gid)
{
struct mlx4_ib_qp *mqp = to_mqp(ibqp);
struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
struct mlx4_ib_gid_entry *ge;
ge = kzalloc(sizeof *ge, GFP_KERNEL);
if (!ge)
return -ENOMEM;
ge->gid = *gid;
if (mlx4_ib_add_mc(mdev, mqp, gid)) {
ge->port = mqp->port;
ge->added = 1;
}
mutex_lock(&mqp->mutex);
list_add_tail(&ge->list, &mqp->gid_list);
mutex_unlock(&mqp->mutex);
return 0;
}
int mlx4_ib_add_mc(struct mlx4_ib_dev *mdev, struct mlx4_ib_qp *mqp,
union ib_gid *gid)
{
u8 mac[6];
struct net_device *ndev;
int ret = 0;
if (!mqp->port)
return 0;
spin_lock(&mdev->iboe.lock);
ndev = mdev->iboe.netdevs[mqp->port - 1];
if (ndev)
dev_hold(ndev);
spin_unlock(&mdev->iboe.lock);
if (ndev) {
rdma_get_mcast_mac((struct in6_addr *)gid, mac);
rtnl_lock();
dev_mc_add(mdev->iboe.netdevs[mqp->port - 1], mac);
ret = 1;
rtnl_unlock();
dev_put(ndev);
}
return ret;
}
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)->flags &
int err;
struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
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));
if (err)
return err;
err = add_gid_entry(ibqp, gid);
if (err)
goto err_add;
return 0;
err_add:
mlx4_multicast_detach(mdev->dev, &mqp->mqp, gid->raw);
return err;
}
static struct mlx4_ib_gid_entry *find_gid_entry(struct mlx4_ib_qp *qp, u8 *raw)
{
struct mlx4_ib_gid_entry *ge;
struct mlx4_ib_gid_entry *tmp;
struct mlx4_ib_gid_entry *ret = NULL;
list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
if (!memcmp(raw, ge->gid.raw, 16)) {
ret = ge;
break;
}
}
return ret;
}
static int mlx4_ib_mcg_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
{
return mlx4_multicast_detach(to_mdev(ibqp->device)->dev,
&to_mqp(ibqp)->mqp, gid->raw);
int err;
struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
struct mlx4_ib_qp *mqp = to_mqp(ibqp);
u8 mac[6];
struct net_device *ndev;
struct mlx4_ib_gid_entry *ge;
err = mlx4_multicast_detach(mdev->dev,
&mqp->mqp, gid->raw);
if (err)
return err;
mutex_lock(&mqp->mutex);
ge = find_gid_entry(mqp, gid->raw);
if (ge) {
spin_lock(&mdev->iboe.lock);
ndev = ge->added ? mdev->iboe.netdevs[ge->port - 1] : NULL;
if (ndev)
dev_hold(ndev);
spin_unlock(&mdev->iboe.lock);
rdma_get_mcast_mac((struct in6_addr *)gid, mac);
if (ndev) {
rtnl_lock();
dev_mc_del(mdev->iboe.netdevs[ge->port - 1], mac);
rtnl_unlock();
dev_put(ndev);
}
list_del(&ge->list);
kfree(ge);
} else
printk(KERN_WARNING "could not find mgid entry\n");
mutex_unlock(&mqp->mutex);
return 0;
}
static int init_node_data(struct mlx4_ib_dev *dev)
@ -543,15 +755,143 @@ static struct device_attribute *mlx4_class_attributes[] = {
&dev_attr_board_id
};
static void mlx4_addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
{
memcpy(eui, dev->dev_addr, 3);
memcpy(eui + 5, dev->dev_addr + 3, 3);
eui[3] = 0xFF;
eui[4] = 0xFE;
eui[0] ^= 2;
}
static void update_gids_task(struct work_struct *work)
{
struct update_gid_work *gw = container_of(work, struct update_gid_work, work);
struct mlx4_cmd_mailbox *mailbox;
union ib_gid *gids;
int err;
struct mlx4_dev *dev = gw->dev->dev;
struct ib_event event;
mailbox = mlx4_alloc_cmd_mailbox(dev);
if (IS_ERR(mailbox)) {
printk(KERN_WARNING "update gid table failed %ld\n", PTR_ERR(mailbox));
return;
}
gids = mailbox->buf;
memcpy(gids, gw->gids, sizeof gw->gids);
err = mlx4_cmd(dev, mailbox->dma, MLX4_SET_PORT_GID_TABLE << 8 | gw->port,
1, MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B);
if (err)
printk(KERN_WARNING "set port command failed\n");
else {
memcpy(gw->dev->iboe.gid_table[gw->port - 1], gw->gids, sizeof gw->gids);
event.device = &gw->dev->ib_dev;
event.element.port_num = gw->port;
event.event = IB_EVENT_LID_CHANGE;
ib_dispatch_event(&event);
}
mlx4_free_cmd_mailbox(dev, mailbox);
kfree(gw);
}
static int update_ipv6_gids(struct mlx4_ib_dev *dev, int port, int clear)
{
struct net_device *ndev = dev->iboe.netdevs[port - 1];
struct update_gid_work *work;
work = kzalloc(sizeof *work, GFP_ATOMIC);
if (!work)
return -ENOMEM;
if (!clear) {
mlx4_addrconf_ifid_eui48(&work->gids[0].raw[8], ndev);
work->gids[0].global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
}
INIT_WORK(&work->work, update_gids_task);
work->port = port;
work->dev = dev;
queue_work(wq, &work->work);
return 0;
}
static void handle_en_event(struct mlx4_ib_dev *dev, int port, unsigned long event)
{
switch (event) {
case NETDEV_UP:
update_ipv6_gids(dev, port, 0);
break;
case NETDEV_DOWN:
update_ipv6_gids(dev, port, 1);
dev->iboe.netdevs[port - 1] = NULL;
}
}
static void netdev_added(struct mlx4_ib_dev *dev, int port)
{
update_ipv6_gids(dev, port, 0);
}
static void netdev_removed(struct mlx4_ib_dev *dev, int port)
{
update_ipv6_gids(dev, port, 1);
}
static int mlx4_ib_netdev_event(struct notifier_block *this, unsigned long event,
void *ptr)
{
struct net_device *dev = ptr;
struct mlx4_ib_dev *ibdev;
struct net_device *oldnd;
struct mlx4_ib_iboe *iboe;
int port;
if (!net_eq(dev_net(dev), &init_net))
return NOTIFY_DONE;
ibdev = container_of(this, struct mlx4_ib_dev, iboe.nb);
iboe = &ibdev->iboe;
spin_lock(&iboe->lock);
mlx4_foreach_ib_transport_port(port, ibdev->dev) {
oldnd = iboe->netdevs[port - 1];
iboe->netdevs[port - 1] =
mlx4_get_protocol_dev(ibdev->dev, MLX4_PROTOCOL_EN, port);
if (oldnd != iboe->netdevs[port - 1]) {
if (iboe->netdevs[port - 1])
netdev_added(ibdev, port);
else
netdev_removed(ibdev, port);
}
}
if (dev == iboe->netdevs[0])
handle_en_event(ibdev, 1, event);
else if (dev == iboe->netdevs[1])
handle_en_event(ibdev, 2, event);
spin_unlock(&iboe->lock);
return NOTIFY_DONE;
}
static void *mlx4_ib_add(struct mlx4_dev *dev)
{
struct mlx4_ib_dev *ibdev;
int num_ports = 0;
int i;
int err;
struct mlx4_ib_iboe *iboe;
printk_once(KERN_INFO "%s", mlx4_ib_version);
mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB)
mlx4_foreach_ib_transport_port(i, dev)
num_ports++;
/* No point in registering a device with no ports... */
@ -564,6 +904,8 @@ static void *mlx4_ib_add(struct mlx4_dev *dev)
return NULL;
}
iboe = &ibdev->iboe;
if (mlx4_pd_alloc(dev, &ibdev->priv_pdn))
goto err_dealloc;
@ -612,6 +954,7 @@ static void *mlx4_ib_add(struct mlx4_dev *dev)
ibdev->ib_dev.query_device = mlx4_ib_query_device;
ibdev->ib_dev.query_port = mlx4_ib_query_port;
ibdev->ib_dev.get_link_layer = mlx4_ib_port_link_layer;
ibdev->ib_dev.query_gid = mlx4_ib_query_gid;
ibdev->ib_dev.query_pkey = mlx4_ib_query_pkey;
ibdev->ib_dev.modify_device = mlx4_ib_modify_device;
@ -656,6 +999,8 @@ static void *mlx4_ib_add(struct mlx4_dev *dev)
ibdev->ib_dev.unmap_fmr = mlx4_ib_unmap_fmr;
ibdev->ib_dev.dealloc_fmr = mlx4_ib_fmr_dealloc;
spin_lock_init(&iboe->lock);
if (init_node_data(ibdev))
goto err_map;
@ -668,16 +1013,28 @@ static void *mlx4_ib_add(struct mlx4_dev *dev)
if (mlx4_ib_mad_init(ibdev))
goto err_reg;
if (dev->caps.flags & MLX4_DEV_CAP_FLAG_IBOE && !iboe->nb.notifier_call) {
iboe->nb.notifier_call = mlx4_ib_netdev_event;
err = register_netdevice_notifier(&iboe->nb);
if (err)
goto err_reg;
}
for (i = 0; i < ARRAY_SIZE(mlx4_class_attributes); ++i) {
if (device_create_file(&ibdev->ib_dev.dev,
mlx4_class_attributes[i]))
goto err_reg;
goto err_notif;
}
ibdev->ib_active = true;
return ibdev;
err_notif:
if (unregister_netdevice_notifier(&ibdev->iboe.nb))
printk(KERN_WARNING "failure unregistering notifier\n");
flush_workqueue(wq);
err_reg:
ib_unregister_device(&ibdev->ib_dev);
@ -703,11 +1060,16 @@ static void mlx4_ib_remove(struct mlx4_dev *dev, void *ibdev_ptr)
mlx4_ib_mad_cleanup(ibdev);
ib_unregister_device(&ibdev->ib_dev);
if (ibdev->iboe.nb.notifier_call) {
if (unregister_netdevice_notifier(&ibdev->iboe.nb))
printk(KERN_WARNING "failure unregistering notifier\n");
ibdev->iboe.nb.notifier_call = NULL;
}
iounmap(ibdev->uar_map);
for (p = 1; p <= ibdev->num_ports; ++p)
mlx4_foreach_port(p, dev, MLX4_PORT_TYPE_IB)
mlx4_CLOSE_PORT(dev, p);
iounmap(ibdev->uar_map);
mlx4_uar_free(dev, &ibdev->priv_uar);
mlx4_pd_free(dev, ibdev->priv_pdn);
ib_dealloc_device(&ibdev->ib_dev);
@ -749,17 +1111,31 @@ static void mlx4_ib_event(struct mlx4_dev *dev, void *ibdev_ptr,
static struct mlx4_interface mlx4_ib_interface = {
.add = mlx4_ib_add,
.remove = mlx4_ib_remove,
.event = mlx4_ib_event
.event = mlx4_ib_event,
.protocol = MLX4_PROTOCOL_IB
};
static int __init mlx4_ib_init(void)
{
return mlx4_register_interface(&mlx4_ib_interface);
int err;
wq = create_singlethread_workqueue("mlx4_ib");
if (!wq)
return -ENOMEM;
err = mlx4_register_interface(&mlx4_ib_interface);
if (err) {
destroy_workqueue(wq);
return err;
}
return 0;
}
static void __exit mlx4_ib_cleanup(void)
{
mlx4_unregister_interface(&mlx4_ib_interface);
destroy_workqueue(wq);
}
module_init(mlx4_ib_init);

32
drivers/infiniband/hw/mlx4/mlx4_ib.h
View File

@ -112,6 +112,13 @@ enum mlx4_ib_qp_flags {
MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK = 1 << 1,
};
struct mlx4_ib_gid_entry {
struct list_head list;
union ib_gid gid;
int added;
u8 port;
};
struct mlx4_ib_qp {
struct ib_qp ibqp;
struct mlx4_qp mqp;
@ -138,6 +145,8 @@ struct mlx4_ib_qp {
u8 resp_depth;
u8 sq_no_prefetch;
u8 state;
int mlx_type;
struct list_head gid_list;
};
struct mlx4_ib_srq {
@ -157,7 +166,14 @@ struct mlx4_ib_srq {
struct mlx4_ib_ah {
struct ib_ah ibah;
struct mlx4_av av;
union mlx4_ext_av av;
};
struct mlx4_ib_iboe {
spinlock_t lock;
struct net_device *netdevs[MLX4_MAX_PORTS];
struct notifier_block nb;
union ib_gid gid_table[MLX4_MAX_PORTS][128];
};
struct mlx4_ib_dev {
@ -176,6 +192,7 @@ struct mlx4_ib_dev {
struct mutex cap_mask_mutex;
bool ib_active;
struct mlx4_ib_iboe iboe;
};
static inline struct mlx4_ib_dev *to_mdev(struct ib_device *ibdev)
@ -314,9 +331,20 @@ int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list, int npages,
int mlx4_ib_unmap_fmr(struct list_head *fmr_list);
int mlx4_ib_fmr_dealloc(struct ib_fmr *fmr);
int mlx4_ib_resolve_grh(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah_attr,
u8 *mac, int *is_mcast, u8 port);
static inline int mlx4_ib_ah_grh_present(struct mlx4_ib_ah *ah)
{
return !!(ah->av.g_slid & 0x80);
u8 port = be32_to_cpu(ah->av.ib.port_pd) >> 24 & 3;
if (rdma_port_get_link_layer(ah->ibah.device, port) == IB_LINK_LAYER_ETHERNET)
return 1;
return !!(ah->av.ib.g_slid & 0x80);
}
int mlx4_ib_add_mc(struct mlx4_ib_dev *mdev, struct mlx4_ib_qp *mqp,
union ib_gid *gid);
#endif /* MLX4_IB_H */

112
drivers/infiniband/hw/mlx4/qp.c
View File

@ -33,6 +33,7 @@
#include <linux/log2.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
#include <rdma/ib_cache.h>
#include <rdma/ib_pack.h>
@ -48,17 +49,25 @@ 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.
* Largest possible UD header: send with GRH and immediate
* data plus 14 bytes for an Ethernet header. (LRH would only
* use 8 bytes, so Ethernet is the biggest case)
*/
MLX4_IB_UD_HEADER_SIZE = 72,
MLX4_IB_UD_HEADER_SIZE = 78,
MLX4_IB_LSO_HEADER_SPARE = 128,
};
enum {
MLX4_IB_IBOE_ETHERTYPE = 0x8915
};
struct mlx4_ib_sqp {
struct mlx4_ib_qp qp;
int pkey_index;
@ -462,6 +471,7 @@ static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
mutex_init(&qp->mutex);
spin_lock_init(&qp->sq.lock);
spin_lock_init(&qp->rq.lock);
INIT_LIST_HEAD(&qp->gid_list);
qp->state = IB_QPS_RESET;
if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
@ -649,6 +659,16 @@ static void mlx4_ib_unlock_cqs(struct mlx4_ib_cq *send_cq, struct mlx4_ib_cq *re
}
}
static void del_gid_entries(struct mlx4_ib_qp *qp)
{
struct mlx4_ib_gid_entry *ge, *tmp;
list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
list_del(&ge->list);
kfree(ge);
}
}
static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
int is_user)
{
@ -695,6 +715,8 @@ static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
if (!qp->ibqp.srq)
mlx4_db_free(dev->dev, &qp->db);
}
del_gid_entries(qp);
}
struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd,
@ -852,6 +874,12 @@ 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 = rdma_port_get_link_layer(&dev->ib_dev, port) ==
IB_LINK_LAYER_ETHERNET;
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) {
@ -882,9 +910,35 @@ 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, port);
if (err)
return err;
memcpy(path->dmac, mac, 6);
path->ackto = MLX4_IB_LINK_TYPE_ETH;
/* use index 0 into MAC table for IBoE */
path->grh_mylmc &= 0x80;
}
return 0;
}
static void update_mcg_macs(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
{
struct mlx4_ib_gid_entry *ge, *tmp;
list_for_each_entry_safe(ge, tmp, &qp->gid_list, list) {
if (!ge->added && mlx4_ib_add_mc(dev, qp, &ge->gid)) {
ge->added = 1;
ge->port = qp->port;
}
}
}
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)
@ -980,7 +1034,7 @@ 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;
}
@ -1118,8 +1172,10 @@ static int __mlx4_ib_modify_qp(struct ib_qp *ibqp,
qp->atomic_rd_en = attr->qp_access_flags;
if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
qp->resp_depth = attr->max_dest_rd_atomic;
if (attr_mask & IB_QP_PORT)
if (attr_mask & IB_QP_PORT) {
qp->port = attr->port_num;
update_mcg_macs(dev, qp);
}
if (attr_mask & IB_QP_ALT_PATH)
qp->alt_port = attr->alt_port_num;
@ -1226,35 +1282,45 @@ static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
int header_size;
int spc;
int i;
int is_eth;
int is_grh;
send_size = 0;
for (i = 0; i < wr->num_sge; ++i)
send_size += wr->sg_list[i].length;
ib_ud_header_init(send_size, 1, 0, mlx4_ib_ah_grh_present(ah), 0, &sqp->ud_header);
is_eth = rdma_port_get_link_layer(sqp->qp.ibqp.device, sqp->qp.port) == IB_LINK_LAYER_ETHERNET;
is_grh = mlx4_ib_ah_grh_present(ah);
ib_ud_header_init(send_size, !is_eth, is_eth, is_grh, 0, &sqp->ud_header);
if (!is_eth) {
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);
if (mlx4_ib_ah_grh_present(ah)) {
be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
sqp->ud_header.lrh.destination_lid = ah->av.ib.dlid;
sqp->ud_header.lrh.source_lid = cpu_to_be16(ah->av.ib.g_slid & 0x7f);
}
if (is_grh) {
sqp->ud_header.grh.traffic_class =
(be32_to_cpu(ah->av.sl_tclass_flowlabel) >> 20) & 0xff;
(be32_to_cpu(ah->av.ib.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);
ah->av.ib.sl_tclass_flowlabel & cpu_to_be32(0xfffff);
sqp->ud_header.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->ud_header.grh.source_gid);
memcpy(sqp->ud_header.grh.destination_gid.raw,
ah->av.dgid, 16);
ah->av.ib.dgid, 16);
}
mlx->flags &= cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE);
if (!is_eth) {
mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MLX4_WQE_MLX_VL15 : 0) |
(sqp->ud_header.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;
}
switch (wr->opcode) {
case IB_WR_SEND:
@ -1270,9 +1336,21 @@ static int build_mlx_header(struct mlx4_ib_sqp *sqp, struct ib_send_wr *wr,
return -EINVAL;
}
if (is_eth) {
u8 *smac;
memcpy(sqp->ud_header.eth.dmac_h, ah->av.eth.mac, 6);
/* FIXME: cache smac value? */
smac = to_mdev(sqp->qp.ibqp.device)->iboe.netdevs[sqp->qp.port - 1]->dev_addr;
memcpy(sqp->ud_header.eth.smac_h, smac, 6);
if (!memcmp(sqp->ud_header.eth.smac_h, sqp->ud_header.eth.dmac_h, 6))
mlx->flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
sqp->ud_header.eth.type = cpu_to_be16(MLX4_IB_IBOE_ETHERTYPE);
} else {
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);
if (!sqp->qp.ibqp.qp_num)
ib_get_cached_pkey(ib_dev, sqp->qp.port, sqp->pkey_index, &pkey);
@ -1434,6 +1512,8 @@ 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, to_mah(wr->wr.ud.ah)->av.eth.mac, 6);
}
static void set_mlx_icrc_seg(void *dseg)

27
include/linux/mlx4/device.h
View File

@ -374,6 +374,27 @@ 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[6];
};
union mlx4_ext_av {
struct mlx4_av ib;
struct mlx4_eth_av eth;
};
struct mlx4_dev {
struct pci_dev *pdev;
unsigned long flags;
@ -402,6 +423,12 @@ 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_IBOE))
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);