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linuxdebug/drivers/infiniband/hw/mlx4/main.c

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null pointer error
2024-07-16 15:50:57 +02:00
/*
* Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/module.h>
#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 <linux/if_vlan.h>
#include <linux/sched/mm.h>
#include <linux/sched/task.h>
#include <net/ipv6.h>
#include <net/addrconf.h>
#include <net/devlink.h>
#include <rdma/ib_smi.h>
#include <rdma/ib_user_verbs.h>
#include <rdma/ib_addr.h>
#include <rdma/ib_cache.h>
#include <net/bonding.h>
#include <linux/mlx4/driver.h>
#include <linux/mlx4/cmd.h>
#include <linux/mlx4/qp.h>
#include "mlx4_ib.h"
#include <rdma/mlx4-abi.h>
#define DRV_NAME MLX4_IB_DRV_NAME
#define DRV_VERSION "4.0-0"
#define MLX4_IB_FLOW_MAX_PRIO 0xFFF
#define MLX4_IB_FLOW_QPN_MASK 0xFFFFFF
#define MLX4_IB_CARD_REV_A0 0xA0
MODULE_AUTHOR("Roland Dreier");
MODULE_DESCRIPTION("Mellanox ConnectX HCA InfiniBand driver");
MODULE_LICENSE("Dual BSD/GPL");
int mlx4_ib_sm_guid_assign = 0;
module_param_named(sm_guid_assign, mlx4_ib_sm_guid_assign, int, 0444);
MODULE_PARM_DESC(sm_guid_assign, "Enable SM alias_GUID assignment if sm_guid_assign > 0 (Default: 0)");
static const char mlx4_ib_version[] =
DRV_NAME ": Mellanox ConnectX InfiniBand driver v"
DRV_VERSION "\n";
static void do_slave_init(struct mlx4_ib_dev *ibdev, int slave, int do_init);
static enum rdma_link_layer mlx4_ib_port_link_layer(struct ib_device *device,
u32 port_num);
static struct workqueue_struct *wq;
static int check_flow_steering_support(struct mlx4_dev *dev)
{
int eth_num_ports = 0;
int ib_num_ports = 0;
int dmfs = dev->caps.steering_mode == MLX4_STEERING_MODE_DEVICE_MANAGED;
if (dmfs) {
int i;
mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
eth_num_ports++;
mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB)
ib_num_ports++;
dmfs &= (!ib_num_ports ||
(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_DMFS_IPOIB)) &&
(!eth_num_ports ||
(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_FS_EN));
if (ib_num_ports && mlx4_is_mfunc(dev)) {
pr_warn("Device managed flow steering is unavailable for IB port in multifunction env.\n");
dmfs = 0;
}
}
return dmfs;
}
static int num_ib_ports(struct mlx4_dev *dev)
{
int ib_ports = 0;
int i;
mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB)
ib_ports++;
return ib_ports;
}
static struct net_device *mlx4_ib_get_netdev(struct ib_device *device,
u32 port_num)
{
struct mlx4_ib_dev *ibdev = to_mdev(device);
struct net_device *dev;
rcu_read_lock();
dev = mlx4_get_protocol_dev(ibdev->dev, MLX4_PROT_ETH, port_num);
if (dev) {
if (mlx4_is_bonded(ibdev->dev)) {
struct net_device *upper = NULL;
upper = netdev_master_upper_dev_get_rcu(dev);
if (upper) {
struct net_device *active;
active = bond_option_active_slave_get_rcu(netdev_priv(upper));
if (active)
dev = active;
}
}
}
if (dev)
dev_hold(dev);
rcu_read_unlock();
return dev;
}
static int mlx4_ib_update_gids_v1(struct gid_entry *gids,
struct mlx4_ib_dev *ibdev,
u32 port_num)
{
struct mlx4_cmd_mailbox *mailbox;
int err;
struct mlx4_dev *dev = ibdev->dev;
int i;
union ib_gid *gid_tbl;
mailbox = mlx4_alloc_cmd_mailbox(dev);
if (IS_ERR(mailbox))
return -ENOMEM;
gid_tbl = mailbox->buf;
for (i = 0; i < MLX4_MAX_PORT_GIDS; ++i)
memcpy(&gid_tbl[i], &gids[i].gid, sizeof(union ib_gid));
err = mlx4_cmd(dev, mailbox->dma,
MLX4_SET_PORT_GID_TABLE << 8 | port_num,
1, MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
MLX4_CMD_WRAPPED);
if (mlx4_is_bonded(dev))
err += mlx4_cmd(dev, mailbox->dma,
MLX4_SET_PORT_GID_TABLE << 8 | 2,
1, MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
MLX4_CMD_WRAPPED);
mlx4_free_cmd_mailbox(dev, mailbox);
return err;
}
static int mlx4_ib_update_gids_v1_v2(struct gid_entry *gids,
struct mlx4_ib_dev *ibdev,
u32 port_num)
{
struct mlx4_cmd_mailbox *mailbox;
int err;
struct mlx4_dev *dev = ibdev->dev;
int i;
struct {
union ib_gid gid;
__be32 rsrvd1[2];
__be16 rsrvd2;
u8 type;
u8 version;
__be32 rsrvd3;
} *gid_tbl;
mailbox = mlx4_alloc_cmd_mailbox(dev);
if (IS_ERR(mailbox))
return -ENOMEM;
gid_tbl = mailbox->buf;
for (i = 0; i < MLX4_MAX_PORT_GIDS; ++i) {
memcpy(&gid_tbl[i].gid, &gids[i].gid, sizeof(union ib_gid));
if (gids[i].gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
gid_tbl[i].version = 2;
if (!ipv6_addr_v4mapped((struct in6_addr *)&gids[i].gid))
gid_tbl[i].type = 1;
}
}
err = mlx4_cmd(dev, mailbox->dma,
MLX4_SET_PORT_ROCE_ADDR << 8 | port_num,
1, MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
MLX4_CMD_WRAPPED);
if (mlx4_is_bonded(dev))
err += mlx4_cmd(dev, mailbox->dma,
MLX4_SET_PORT_ROCE_ADDR << 8 | 2,
1, MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
MLX4_CMD_WRAPPED);
mlx4_free_cmd_mailbox(dev, mailbox);
return err;
}
static int mlx4_ib_update_gids(struct gid_entry *gids,
struct mlx4_ib_dev *ibdev,
u32 port_num)
{
if (ibdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_ROCE_V1_V2)
return mlx4_ib_update_gids_v1_v2(gids, ibdev, port_num);
return mlx4_ib_update_gids_v1(gids, ibdev, port_num);
}
static void free_gid_entry(struct gid_entry *entry)
{
memset(&entry->gid, 0, sizeof(entry->gid));
kfree(entry->ctx);
entry->ctx = NULL;
}
static int mlx4_ib_add_gid(const struct ib_gid_attr *attr, void **context)
{
struct mlx4_ib_dev *ibdev = to_mdev(attr->device);
struct mlx4_ib_iboe *iboe = &ibdev->iboe;
struct mlx4_port_gid_table *port_gid_table;
int free = -1, found = -1;
int ret = 0;
int hw_update = 0;
int i;
struct gid_entry *gids = NULL;
u16 vlan_id = 0xffff;
u8 mac[ETH_ALEN];
if (!rdma_cap_roce_gid_table(attr->device, attr->port_num))
return -EINVAL;
if (attr->port_num > MLX4_MAX_PORTS)
return -EINVAL;
if (!context)
return -EINVAL;
ret = rdma_read_gid_l2_fields(attr, &vlan_id, &mac[0]);
if (ret)
return ret;
port_gid_table = &iboe->gids[attr->port_num - 1];
spin_lock_bh(&iboe->lock);
for (i = 0; i < MLX4_MAX_PORT_GIDS; ++i) {
if (!memcmp(&port_gid_table->gids[i].gid,
&attr->gid, sizeof(attr->gid)) &&
port_gid_table->gids[i].gid_type == attr->gid_type &&
port_gid_table->gids[i].vlan_id == vlan_id) {
found = i;
break;
}
if (free < 0 && rdma_is_zero_gid(&port_gid_table->gids[i].gid))
free = i; /* HW has space */
}
if (found < 0) {
if (free < 0) {
ret = -ENOSPC;
} else {
port_gid_table->gids[free].ctx = kmalloc(sizeof(*port_gid_table->gids[free].ctx), GFP_ATOMIC);
if (!port_gid_table->gids[free].ctx) {
ret = -ENOMEM;
} else {
*context = port_gid_table->gids[free].ctx;
memcpy(&port_gid_table->gids[free].gid,
&attr->gid, sizeof(attr->gid));
port_gid_table->gids[free].gid_type = attr->gid_type;
port_gid_table->gids[free].vlan_id = vlan_id;
port_gid_table->gids[free].ctx->real_index = free;
port_gid_table->gids[free].ctx->refcount = 1;
hw_update = 1;
}
}
} else {
struct gid_cache_context *ctx = port_gid_table->gids[found].ctx;
*context = ctx;
ctx->refcount++;
}
if (!ret && hw_update) {
gids = kmalloc_array(MLX4_MAX_PORT_GIDS, sizeof(*gids),
GFP_ATOMIC);
if (!gids) {
ret = -ENOMEM;
*context = NULL;
free_gid_entry(&port_gid_table->gids[free]);
} else {
for (i = 0; i < MLX4_MAX_PORT_GIDS; i++) {
memcpy(&gids[i].gid, &port_gid_table->gids[i].gid, sizeof(union ib_gid));
gids[i].gid_type = port_gid_table->gids[i].gid_type;
}
}
}
spin_unlock_bh(&iboe->lock);
if (!ret && hw_update) {
ret = mlx4_ib_update_gids(gids, ibdev, attr->port_num);
if (ret) {
spin_lock_bh(&iboe->lock);
*context = NULL;
free_gid_entry(&port_gid_table->gids[free]);
spin_unlock_bh(&iboe->lock);
}
kfree(gids);
}
return ret;
}
static int mlx4_ib_del_gid(const struct ib_gid_attr *attr, void **context)
{
struct gid_cache_context *ctx = *context;
struct mlx4_ib_dev *ibdev = to_mdev(attr->device);
struct mlx4_ib_iboe *iboe = &ibdev->iboe;
struct mlx4_port_gid_table *port_gid_table;
int ret = 0;
int hw_update = 0;
struct gid_entry *gids = NULL;
if (!rdma_cap_roce_gid_table(attr->device, attr->port_num))
return -EINVAL;
if (attr->port_num > MLX4_MAX_PORTS)
return -EINVAL;
port_gid_table = &iboe->gids[attr->port_num - 1];
spin_lock_bh(&iboe->lock);
if (ctx) {
ctx->refcount--;
if (!ctx->refcount) {
unsigned int real_index = ctx->real_index;
free_gid_entry(&port_gid_table->gids[real_index]);
hw_update = 1;
}
}
if (!ret && hw_update) {
int i;
gids = kmalloc_array(MLX4_MAX_PORT_GIDS, sizeof(*gids),
GFP_ATOMIC);
if (!gids) {
ret = -ENOMEM;
} else {
for (i = 0; i < MLX4_MAX_PORT_GIDS; i++) {
memcpy(&gids[i].gid,
&port_gid_table->gids[i].gid,
sizeof(union ib_gid));
gids[i].gid_type =
port_gid_table->gids[i].gid_type;
}
}
}
spin_unlock_bh(&iboe->lock);
if (!ret && hw_update) {
ret = mlx4_ib_update_gids(gids, ibdev, attr->port_num);
kfree(gids);
}
return ret;
}
int mlx4_ib_gid_index_to_real_index(struct mlx4_ib_dev *ibdev,
const struct ib_gid_attr *attr)
{
struct mlx4_ib_iboe *iboe = &ibdev->iboe;
struct gid_cache_context *ctx = NULL;
struct mlx4_port_gid_table *port_gid_table;
int real_index = -EINVAL;
int i;
unsigned long flags;
u32 port_num = attr->port_num;
if (port_num > MLX4_MAX_PORTS)
return -EINVAL;
if (mlx4_is_bonded(ibdev->dev))
port_num = 1;
if (!rdma_cap_roce_gid_table(&ibdev->ib_dev, port_num))
return attr->index;
spin_lock_irqsave(&iboe->lock, flags);
port_gid_table = &iboe->gids[port_num - 1];
for (i = 0; i < MLX4_MAX_PORT_GIDS; ++i)
if (!memcmp(&port_gid_table->gids[i].gid,
&attr->gid, sizeof(attr->gid)) &&
attr->gid_type == port_gid_table->gids[i].gid_type) {
ctx = port_gid_table->gids[i].ctx;
break;
}
if (ctx)
real_index = ctx->real_index;
spin_unlock_irqrestore(&iboe->lock, flags);
return real_index;
}
static int mlx4_ib_query_device(struct ib_device *ibdev,
struct ib_device_attr *props,
struct ib_udata *uhw)
{
struct mlx4_ib_dev *dev = to_mdev(ibdev);
struct ib_smp *in_mad = NULL;
struct ib_smp *out_mad = NULL;
int err;
int have_ib_ports;
struct mlx4_uverbs_ex_query_device cmd;
struct mlx4_uverbs_ex_query_device_resp resp = {};
struct mlx4_clock_params clock_params;
if (uhw->inlen) {
if (uhw->inlen < sizeof(cmd))
return -EINVAL;
err = ib_copy_from_udata(&cmd, uhw, sizeof(cmd));
if (err)
return err;
if (cmd.comp_mask)
return -EINVAL;
if (cmd.reserved)
return -EINVAL;
}
resp.response_length = offsetof(typeof(resp), response_length) +
sizeof(resp.response_length);
in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
err = -ENOMEM;
if (!in_mad || !out_mad)
goto out;
ib_init_query_mad(in_mad);
in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
err = mlx4_MAD_IFC(to_mdev(ibdev), MLX4_MAD_IFC_IGNORE_KEYS,
1, NULL, NULL, in_mad, out_mad);
if (err)
goto out;
memset(props, 0, sizeof *props);
have_ib_ports = num_ib_ports(dev->dev);
props->fw_ver = dev->dev->caps.fw_ver;
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;
props->kernel_cap_flags = IBK_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)
props->device_cap_flags |= IB_DEVICE_BAD_QKEY_CNTR;
if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_APM && have_ib_ports)
props->device_cap_flags |= IB_DEVICE_AUTO_PATH_MIG;
if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_UD_AV_PORT)
props->device_cap_flags |= IB_DEVICE_UD_AV_PORT_ENFORCE;
if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_IPOIB_CSUM)
props->device_cap_flags |= IB_DEVICE_UD_IP_CSUM;
if (dev->dev->caps.max_gso_sz &&
(dev->dev->rev_id != MLX4_IB_CARD_REV_A0) &&
(dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BLH))
props->kernel_cap_flags |= IBK_UD_TSO;
if (dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_RESERVED_LKEY)
props->kernel_cap_flags |= IBK_LOCAL_DMA_LKEY;
if ((dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_LOCAL_INV) &&
(dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_REMOTE_INV) &&
(dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_FAST_REG_WR))
props->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC)
props->device_cap_flags |= IB_DEVICE_XRC;
if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_MEM_WINDOW)
props->device_cap_flags |= IB_DEVICE_MEM_WINDOW;
if (dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_TYPE_2_WIN) {
if (dev->dev->caps.bmme_flags & MLX4_BMME_FLAG_WIN_TYPE_2B)
props->device_cap_flags |= IB_DEVICE_MEM_WINDOW_TYPE_2B;
else
props->device_cap_flags |= IB_DEVICE_MEM_WINDOW_TYPE_2A;
}
if (dev->steering_support == MLX4_STEERING_MODE_DEVICE_MANAGED)
props->device_cap_flags |= IB_DEVICE_MANAGED_FLOW_STEERING;
props->device_cap_flags |= IB_DEVICE_RAW_IP_CSUM;
props->vendor_id = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
0xffffff;
props->vendor_part_id = dev->dev->persist->pdev->device;
props->hw_ver = be32_to_cpup((__be32 *) (out_mad->data + 32));
memcpy(&props->sys_image_guid, out_mad->data + 4, 8);
props->max_mr_size = ~0ull;
props->page_size_cap = dev->dev->caps.page_size_cap;
props->max_qp = dev->dev->quotas.qp;
props->max_qp_wr = dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE;
props->max_send_sge =
min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg);
props->max_recv_sge =
min(dev->dev->caps.max_sq_sg, dev->dev->caps.max_rq_sg);
props->max_sge_rd = MLX4_MAX_SGE_RD;
props->max_cq = dev->dev->quotas.cq;
props->max_cqe = dev->dev->caps.max_cqes;
props->max_mr = dev->dev->quotas.mpt;
props->max_pd = dev->dev->caps.num_pds - dev->dev->caps.reserved_pds;
props->max_qp_rd_atom = dev->dev->caps.max_qp_dest_rdma;
props->max_qp_init_rd_atom = dev->dev->caps.max_qp_init_rdma;
props->max_res_rd_atom = props->max_qp_rd_atom * props->max_qp;
props->max_srq = dev->dev->quotas.srq;
props->max_srq_wr = dev->dev->caps.max_srq_wqes - 1;
props->max_srq_sge = dev->dev->caps.max_srq_sge;
props->max_fast_reg_page_list_len = MLX4_MAX_FAST_REG_PAGES;
props->local_ca_ack_delay = dev->dev->caps.local_ca_ack_delay;
props->atomic_cap = dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_ATOMIC ?
IB_ATOMIC_HCA : IB_ATOMIC_NONE;
props->masked_atomic_cap = props->atomic_cap;
props->max_pkeys = dev->dev->caps.pkey_table_len[1];
props->max_mcast_grp = dev->dev->caps.num_mgms + dev->dev->caps.num_amgms;
props->max_mcast_qp_attach = dev->dev->caps.num_qp_per_mgm;
props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
props->max_mcast_grp;
props->hca_core_clock = dev->dev->caps.hca_core_clock * 1000UL;
props->timestamp_mask = 0xFFFFFFFFFFFFULL;
props->max_ah = INT_MAX;
if (mlx4_ib_port_link_layer(ibdev, 1) == IB_LINK_LAYER_ETHERNET ||
mlx4_ib_port_link_layer(ibdev, 2) == IB_LINK_LAYER_ETHERNET) {
if (dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_RSS) {
props->rss_caps.max_rwq_indirection_tables =
props->max_qp;
props->rss_caps.max_rwq_indirection_table_size =
dev->dev->caps.max_rss_tbl_sz;
props->rss_caps.supported_qpts = 1 << IB_QPT_RAW_PACKET;
props->max_wq_type_rq = props->max_qp;
}
if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_FCS_KEEP)
props->raw_packet_caps |= IB_RAW_PACKET_CAP_SCATTER_FCS;
}
props->cq_caps.max_cq_moderation_count = MLX4_MAX_CQ_COUNT;
props->cq_caps.max_cq_moderation_period = MLX4_MAX_CQ_PERIOD;
if (uhw->outlen >= resp.response_length + sizeof(resp.hca_core_clock_offset)) {
resp.response_length += sizeof(resp.hca_core_clock_offset);
if (!mlx4_get_internal_clock_params(dev->dev, &clock_params)) {
resp.comp_mask |= MLX4_IB_QUERY_DEV_RESP_MASK_CORE_CLOCK_OFFSET;
resp.hca_core_clock_offset = clock_params.offset % PAGE_SIZE;
}
}
if (uhw->outlen >= resp.response_length +
sizeof(resp.max_inl_recv_sz)) {
resp.response_length += sizeof(resp.max_inl_recv_sz);
resp.max_inl_recv_sz = dev->dev->caps.max_rq_sg *
sizeof(struct mlx4_wqe_data_seg);
}
if (offsetofend(typeof(resp), rss_caps) <= uhw->outlen) {
if (props->rss_caps.supported_qpts) {
resp.rss_caps.rx_hash_function =
MLX4_IB_RX_HASH_FUNC_TOEPLITZ;
resp.rss_caps.rx_hash_fields_mask =
MLX4_IB_RX_HASH_SRC_IPV4 |
MLX4_IB_RX_HASH_DST_IPV4 |
MLX4_IB_RX_HASH_SRC_IPV6 |
MLX4_IB_RX_HASH_DST_IPV6 |
MLX4_IB_RX_HASH_SRC_PORT_TCP |
MLX4_IB_RX_HASH_DST_PORT_TCP |
MLX4_IB_RX_HASH_SRC_PORT_UDP |
MLX4_IB_RX_HASH_DST_PORT_UDP;
if (dev->dev->caps.tunnel_offload_mode ==
MLX4_TUNNEL_OFFLOAD_MODE_VXLAN)
resp.rss_caps.rx_hash_fields_mask |=
MLX4_IB_RX_HASH_INNER;
}
resp.response_length = offsetof(typeof(resp), rss_caps) +
sizeof(resp.rss_caps);
}
if (offsetofend(typeof(resp), tso_caps) <= uhw->outlen) {
if (dev->dev->caps.max_gso_sz &&
((mlx4_ib_port_link_layer(ibdev, 1) ==
IB_LINK_LAYER_ETHERNET) ||
(mlx4_ib_port_link_layer(ibdev, 2) ==
IB_LINK_LAYER_ETHERNET))) {
resp.tso_caps.max_tso = dev->dev->caps.max_gso_sz;
resp.tso_caps.supported_qpts |=
1 << IB_QPT_RAW_PACKET;
}
resp.response_length = offsetof(typeof(resp), tso_caps) +
sizeof(resp.tso_caps);
}
if (uhw->outlen) {
err = ib_copy_to_udata(uhw, &resp, resp.response_length);
if (err)
goto out;
}
out:
kfree(in_mad);
kfree(out_mad);
return err;
}
static enum rdma_link_layer
mlx4_ib_port_link_layer(struct ib_device *device, u32 port_num)
{
struct mlx4_dev *dev = to_mdev(device)->dev;
return dev->caps.port_mask[port_num] == MLX4_PORT_TYPE_IB ?
IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
}
static int ib_link_query_port(struct ib_device *ibdev, u32 port,
struct ib_port_attr *props, int netw_view)
{
struct ib_smp *in_mad = NULL;
struct ib_smp *out_mad = NULL;
int ext_active_speed;
int mad_ifc_flags = MLX4_MAD_IFC_IGNORE_KEYS;
int err = -ENOMEM;
in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
if (!in_mad || !out_mad)
goto out;
ib_init_query_mad(in_mad);
in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
in_mad->attr_mod = cpu_to_be32(port);
if (mlx4_is_mfunc(to_mdev(ibdev)->dev) && netw_view)
mad_ifc_flags |= MLX4_MAD_IFC_NET_VIEW;
err = mlx4_MAD_IFC(to_mdev(ibdev), mad_ifc_flags, port, NULL, NULL,
in_mad, out_mad);
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));
if (netw_view)
props->gid_tbl_len = out_mad->data[50];
else
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;
/* Check if extended speeds (EDR/FDR/...) are supported */
if (props->port_cap_flags & IB_PORT_EXTENDED_SPEEDS_SUP) {
ext_active_speed = out_mad->data[62] >> 4;
switch (ext_active_speed) {
case 1:
props->active_speed = IB_SPEED_FDR;
break;
case 2:
props->active_speed = IB_SPEED_EDR;
break;
}
}
/* If reported active speed is QDR, check if is FDR-10 */
if (props->active_speed == IB_SPEED_QDR) {
ib_init_query_mad(in_mad);
in_mad->attr_id = MLX4_ATTR_EXTENDED_PORT_INFO;
in_mad->attr_mod = cpu_to_be32(port);
err = mlx4_MAD_IFC(to_mdev(ibdev), mad_ifc_flags, port,
NULL, NULL, in_mad, out_mad);
if (err)
goto out;
/* Checking LinkSpeedActive for FDR-10 */
if (out_mad->data[15] & 0x1)
props->active_speed = IB_SPEED_FDR10;
}
/* Avoid wrong speed value returned by FW if the IB link is down. */
if (props->state == IB_PORT_DOWN)
props->active_speed = IB_SPEED_SDR;
out:
kfree(in_mad);
kfree(out_mad);
return err;
}
static u8 state_to_phys_state(enum ib_port_state state)
{
return state == IB_PORT_ACTIVE ?
IB_PORT_PHYS_STATE_LINK_UP : IB_PORT_PHYS_STATE_DISABLED;
}
static int eth_link_query_port(struct ib_device *ibdev, u32 port,
struct ib_port_attr *props)
{
struct mlx4_ib_dev *mdev = to_mdev(ibdev);
struct mlx4_ib_iboe *iboe = &mdev->iboe;
struct net_device *ndev;
enum ib_mtu tmp;
struct mlx4_cmd_mailbox *mailbox;
int err = 0;
int is_bonded = mlx4_is_bonded(mdev->dev);
mailbox = mlx4_alloc_cmd_mailbox(mdev->dev);
if (IS_ERR(mailbox))
return PTR_ERR(mailbox);
err = mlx4_cmd_box(mdev->dev, 0, mailbox->dma, port, 0,
MLX4_CMD_QUERY_PORT, MLX4_CMD_TIME_CLASS_B,
MLX4_CMD_WRAPPED);
if (err)
goto out;
props->active_width = (((u8 *)mailbox->buf)[5] == 0x40) ||
(((u8 *)mailbox->buf)[5] == 0x20 /*56Gb*/) ?
IB_WIDTH_4X : IB_WIDTH_1X;
props->active_speed = (((u8 *)mailbox->buf)[5] == 0x20 /*56Gb*/) ?
IB_SPEED_FDR : IB_SPEED_QDR;
props->port_cap_flags = IB_PORT_CM_SUP;
props->ip_gids = true;
props->gid_tbl_len = mdev->dev->caps.gid_table_len[port];
props->max_msg_sz = mdev->dev->caps.max_msg_sz;
if (mdev->dev->caps.pkey_table_len[port])
props->pkey_tbl_len = 1;
props->max_mtu = IB_MTU_4096;
props->max_vl_num = 2;
props->state = IB_PORT_DOWN;
props->phys_state = state_to_phys_state(props->state);
props->active_mtu = IB_MTU_256;
spin_lock_bh(&iboe->lock);
ndev = iboe->netdevs[port - 1];
if (ndev && is_bonded) {
rcu_read_lock(); /* required to get upper dev */
ndev = netdev_master_upper_dev_get_rcu(ndev);
rcu_read_unlock();
}
if (!ndev)
goto out_unlock;
tmp = iboe_get_mtu(ndev->mtu);
props->active_mtu = tmp ? min(props->max_mtu, tmp) : IB_MTU_256;
props->state = (netif_running(ndev) && netif_carrier_ok(ndev)) ?
IB_PORT_ACTIVE : IB_PORT_DOWN;
props->phys_state = state_to_phys_state(props->state);
out_unlock:
spin_unlock_bh(&iboe->lock);
out:
mlx4_free_cmd_mailbox(mdev->dev, mailbox);
return err;
}
int __mlx4_ib_query_port(struct ib_device *ibdev, u32 port,
struct ib_port_attr *props, int netw_view)
{
int err;
/* props being zeroed by the caller, avoid zeroing it here */
err = mlx4_ib_port_link_layer(ibdev, port) == IB_LINK_LAYER_INFINIBAND ?
ib_link_query_port(ibdev, port, props, netw_view) :
eth_link_query_port(ibdev, port, props);
return err;
}
static int mlx4_ib_query_port(struct ib_device *ibdev, u32 port,
struct ib_port_attr *props)
{
/* returns host view */
return __mlx4_ib_query_port(ibdev, port, props, 0);
}
int __mlx4_ib_query_gid(struct ib_device *ibdev, u32 port, int index,
union ib_gid *gid, int netw_view)
{
struct ib_smp *in_mad = NULL;
struct ib_smp *out_mad = NULL;
int err = -ENOMEM;
struct mlx4_ib_dev *dev = to_mdev(ibdev);
int clear = 0;
int mad_ifc_flags = MLX4_MAD_IFC_IGNORE_KEYS;
in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
if (!in_mad || !out_mad)
goto out;
ib_init_query_mad(in_mad);
in_mad->attr_id = IB_SMP_ATTR_PORT_INFO;
in_mad->attr_mod = cpu_to_be32(port);
if (mlx4_is_mfunc(dev->dev) && netw_view)
mad_ifc_flags |= MLX4_MAD_IFC_NET_VIEW;
err = mlx4_MAD_IFC(dev, mad_ifc_flags, port, NULL, NULL, in_mad, out_mad);
if (err)
goto out;
memcpy(gid->raw, out_mad->data + 8, 8);
if (mlx4_is_mfunc(dev->dev) && !netw_view) {
if (index) {
/* For any index > 0, return the null guid */
err = 0;
clear = 1;
goto out;
}
}
ib_init_query_mad(in_mad);
in_mad->attr_id = IB_SMP_ATTR_GUID_INFO;
in_mad->attr_mod = cpu_to_be32(index / 8);
err = mlx4_MAD_IFC(dev, mad_ifc_flags, port,
NULL, NULL, in_mad, out_mad);
if (err)
goto out;
memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);
out:
if (clear)
memset(gid->raw + 8, 0, 8);
kfree(in_mad);
kfree(out_mad);
return err;
}
static int mlx4_ib_query_gid(struct ib_device *ibdev, u32 port, int index,
union ib_gid *gid)
{
if (rdma_protocol_ib(ibdev, port))
return __mlx4_ib_query_gid(ibdev, port, index, gid, 0);
return 0;
}
static int mlx4_ib_query_sl2vl(struct ib_device *ibdev, u32 port,
u64 *sl2vl_tbl)
{
union sl2vl_tbl_to_u64 sl2vl64;
struct ib_smp *in_mad = NULL;
struct ib_smp *out_mad = NULL;
int mad_ifc_flags = MLX4_MAD_IFC_IGNORE_KEYS;
int err = -ENOMEM;
int jj;
if (mlx4_is_slave(to_mdev(ibdev)->dev)) {
*sl2vl_tbl = 0;
return 0;
}
in_mad = kzalloc(sizeof(*in_mad), GFP_KERNEL);
out_mad = kmalloc(sizeof(*out_mad), GFP_KERNEL);
if (!in_mad || !out_mad)
goto out;
ib_init_query_mad(in_mad);
in_mad->attr_id = IB_SMP_ATTR_SL_TO_VL_TABLE;
in_mad->attr_mod = 0;
if (mlx4_is_mfunc(to_mdev(ibdev)->dev))
mad_ifc_flags |= MLX4_MAD_IFC_NET_VIEW;
err = mlx4_MAD_IFC(to_mdev(ibdev), mad_ifc_flags, port, NULL, NULL,
in_mad, out_mad);
if (err)
goto out;
for (jj = 0; jj < 8; jj++)
sl2vl64.sl8[jj] = ((struct ib_smp *)out_mad)->data[jj];
*sl2vl_tbl = sl2vl64.sl64;
out:
kfree(in_mad);
kfree(out_mad);
return err;
}
static void mlx4_init_sl2vl_tbl(struct mlx4_ib_dev *mdev)
{
u64 sl2vl;
int i;
int err;
for (i = 1; i <= mdev->dev->caps.num_ports; i++) {
if (mdev->dev->caps.port_type[i] == MLX4_PORT_TYPE_ETH)
continue;
err = mlx4_ib_query_sl2vl(&mdev->ib_dev, i, &sl2vl);
if (err) {
pr_err("Unable to get default sl to vl mapping for port %d. Using all zeroes (%d)\n",
i, err);
sl2vl = 0;
}
atomic64_set(&mdev->sl2vl[i - 1], sl2vl);
}
}
int __mlx4_ib_query_pkey(struct ib_device *ibdev, u32 port, u16 index,
u16 *pkey, int netw_view)
{
struct ib_smp *in_mad = NULL;
struct ib_smp *out_mad = NULL;
int mad_ifc_flags = MLX4_MAD_IFC_IGNORE_KEYS;
int err = -ENOMEM;
in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
if (!in_mad || !out_mad)
goto out;
ib_init_query_mad(in_mad);
in_mad->attr_id = IB_SMP_ATTR_PKEY_TABLE;
in_mad->attr_mod = cpu_to_be32(index / 32);
if (mlx4_is_mfunc(to_mdev(ibdev)->dev) && netw_view)
mad_ifc_flags |= MLX4_MAD_IFC_NET_VIEW;
err = mlx4_MAD_IFC(to_mdev(ibdev), mad_ifc_flags, port, NULL, NULL,
in_mad, out_mad);
if (err)
goto out;
*pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
out:
kfree(in_mad);
kfree(out_mad);
return err;
}
static int mlx4_ib_query_pkey(struct ib_device *ibdev, u32 port, u16 index,
u16 *pkey)
{
return __mlx4_ib_query_pkey(ibdev, port, index, pkey, 0);
}
static int mlx4_ib_modify_device(struct ib_device *ibdev, int mask,
struct ib_device_modify *props)
{
struct mlx4_cmd_mailbox *mailbox;
unsigned long flags;
if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
return -EOPNOTSUPP;
if (!(mask & IB_DEVICE_MODIFY_NODE_DESC))
return 0;
if (mlx4_is_slave(to_mdev(ibdev)->dev))
return -EOPNOTSUPP;
spin_lock_irqsave(&to_mdev(ibdev)->sm_lock, flags);
memcpy(ibdev->node_desc, props->node_desc, IB_DEVICE_NODE_DESC_MAX);
spin_unlock_irqrestore(&to_mdev(ibdev)->sm_lock, flags);
/*
* If possible, pass node desc to FW, so it can generate
* a 144 trap. If cmd fails, just ignore.
*/
mailbox = mlx4_alloc_cmd_mailbox(to_mdev(ibdev)->dev);
if (IS_ERR(mailbox))
return 0;
memcpy(mailbox->buf, props->node_desc, IB_DEVICE_NODE_DESC_MAX);
mlx4_cmd(to_mdev(ibdev)->dev, mailbox->dma, 1, 0,
MLX4_CMD_SET_NODE, MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);
mlx4_free_cmd_mailbox(to_mdev(ibdev)->dev, mailbox);
return 0;
}
static int mlx4_ib_SET_PORT(struct mlx4_ib_dev *dev, u32 port,
int reset_qkey_viols, u32 cap_mask)
{
struct mlx4_cmd_mailbox *mailbox;
int err;
mailbox = mlx4_alloc_cmd_mailbox(dev->dev);
if (IS_ERR(mailbox))
return PTR_ERR(mailbox);
if (dev->dev->flags & MLX4_FLAG_OLD_PORT_CMDS) {
*(u8 *) mailbox->buf = !!reset_qkey_viols << 6;
((__be32 *) mailbox->buf)[2] = cpu_to_be32(cap_mask);
} else {
((u8 *) mailbox->buf)[3] = !!reset_qkey_viols;
((__be32 *) mailbox->buf)[1] = cpu_to_be32(cap_mask);
}
err = mlx4_cmd(dev->dev, mailbox->dma, port, MLX4_SET_PORT_IB_OPCODE,
MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
MLX4_CMD_WRAPPED);
mlx4_free_cmd_mailbox(dev->dev, mailbox);
return err;
}
static int mlx4_ib_modify_port(struct ib_device *ibdev, u32 port, int mask,
struct ib_port_modify *props)
{
struct mlx4_ib_dev *mdev = to_mdev(ibdev);
u8 is_eth = mdev->dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH;
struct ib_port_attr attr;
u32 cap_mask;
int err;
/* return OK if this is RoCE. CM calls ib_modify_port() regardless
* of whether port link layer is ETH or IB. For ETH ports, qkey
* violations and port capabilities are not meaningful.
*/
if (is_eth)
return 0;
mutex_lock(&mdev->cap_mask_mutex);
err = ib_query_port(ibdev, port, &attr);
if (err)
goto out;
cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
~props->clr_port_cap_mask;
err = mlx4_ib_SET_PORT(mdev, port,
!!(mask & IB_PORT_RESET_QKEY_CNTR),
cap_mask);
out:
mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
return err;
}
static int mlx4_ib_alloc_ucontext(struct ib_ucontext *uctx,
struct ib_udata *udata)
{
struct ib_device *ibdev = uctx->device;
struct mlx4_ib_dev *dev = to_mdev(ibdev);
struct mlx4_ib_ucontext *context = to_mucontext(uctx);
struct mlx4_ib_alloc_ucontext_resp_v3 resp_v3;
struct mlx4_ib_alloc_ucontext_resp resp;
int err;
if (!dev->ib_active)
return -EAGAIN;
if (ibdev->ops.uverbs_abi_ver ==
MLX4_IB_UVERBS_NO_DEV_CAPS_ABI_VERSION) {
resp_v3.qp_tab_size = dev->dev->caps.num_qps;
resp_v3.bf_reg_size = dev->dev->caps.bf_reg_size;
resp_v3.bf_regs_per_page = dev->dev->caps.bf_regs_per_page;
} else {
resp.dev_caps = dev->dev->caps.userspace_caps;
resp.qp_tab_size = dev->dev->caps.num_qps;
resp.bf_reg_size = dev->dev->caps.bf_reg_size;
resp.bf_regs_per_page = dev->dev->caps.bf_regs_per_page;
resp.cqe_size = dev->dev->caps.cqe_size;
}
err = mlx4_uar_alloc(to_mdev(ibdev)->dev, &context->uar);
if (err)
return err;
INIT_LIST_HEAD(&context->db_page_list);
mutex_init(&context->db_page_mutex);
INIT_LIST_HEAD(&context->wqn_ranges_list);
mutex_init(&context->wqn_ranges_mutex);
if (ibdev->ops.uverbs_abi_ver == MLX4_IB_UVERBS_NO_DEV_CAPS_ABI_VERSION)
err = ib_copy_to_udata(udata, &resp_v3, sizeof(resp_v3));
else
err = ib_copy_to_udata(udata, &resp, sizeof(resp));
if (err) {
mlx4_uar_free(to_mdev(ibdev)->dev, &context->uar);
return -EFAULT;
}
return err;
}
static void mlx4_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
{
struct mlx4_ib_ucontext *context = to_mucontext(ibcontext);
mlx4_uar_free(to_mdev(ibcontext->device)->dev, &context->uar);
}
static void mlx4_ib_disassociate_ucontext(struct ib_ucontext *ibcontext)
{
}
static int mlx4_ib_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
{
struct mlx4_ib_dev *dev = to_mdev(context->device);
switch (vma->vm_pgoff) {
case 0:
return rdma_user_mmap_io(context, vma,
to_mucontext(context)->uar.pfn,
PAGE_SIZE,
pgprot_noncached(vma->vm_page_prot),
NULL);
case 1:
if (dev->dev->caps.bf_reg_size == 0)
return -EINVAL;
return rdma_user_mmap_io(
context, vma,
to_mucontext(context)->uar.pfn +
dev->dev->caps.num_uars,
PAGE_SIZE, pgprot_writecombine(vma->vm_page_prot),
NULL);
case 3: {
struct mlx4_clock_params params;
int ret;
ret = mlx4_get_internal_clock_params(dev->dev, &params);
if (ret)
return ret;
return rdma_user_mmap_io(
context, vma,
(pci_resource_start(dev->dev->persist->pdev,
params.bar) +
params.offset) >>
PAGE_SHIFT,
PAGE_SIZE, pgprot_noncached(vma->vm_page_prot),
NULL);
}
default:
return -EINVAL;
}
}
static int mlx4_ib_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
{
struct mlx4_ib_pd *pd = to_mpd(ibpd);
struct ib_device *ibdev = ibpd->device;
int err;
err = mlx4_pd_alloc(to_mdev(ibdev)->dev, &pd->pdn);
if (err)
return err;
if (udata && ib_copy_to_udata(udata, &pd->pdn, sizeof(__u32))) {
mlx4_pd_free(to_mdev(ibdev)->dev, pd->pdn);
return -EFAULT;
}
return 0;
}
static int mlx4_ib_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
{
mlx4_pd_free(to_mdev(pd->device)->dev, to_mpd(pd)->pdn);
return 0;
}
static int mlx4_ib_alloc_xrcd(struct ib_xrcd *ibxrcd, struct ib_udata *udata)
{
struct mlx4_ib_dev *dev = to_mdev(ibxrcd->device);
struct mlx4_ib_xrcd *xrcd = to_mxrcd(ibxrcd);
struct ib_cq_init_attr cq_attr = {};
int err;
if (!(dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC))
return -EOPNOTSUPP;
err = mlx4_xrcd_alloc(dev->dev, &xrcd->xrcdn);
if (err)
return err;
xrcd->pd = ib_alloc_pd(ibxrcd->device, 0);
if (IS_ERR(xrcd->pd)) {
err = PTR_ERR(xrcd->pd);
goto err2;
}
cq_attr.cqe = 1;
xrcd->cq = ib_create_cq(ibxrcd->device, NULL, NULL, xrcd, &cq_attr);
if (IS_ERR(xrcd->cq)) {
err = PTR_ERR(xrcd->cq);
goto err3;
}
return 0;
err3:
ib_dealloc_pd(xrcd->pd);
err2:
mlx4_xrcd_free(dev->dev, xrcd->xrcdn);
return err;
}
static int mlx4_ib_dealloc_xrcd(struct ib_xrcd *xrcd, struct ib_udata *udata)
{
ib_destroy_cq(to_mxrcd(xrcd)->cq);
ib_dealloc_pd(to_mxrcd(xrcd)->pd);
mlx4_xrcd_free(to_mdev(xrcd->device)->dev, to_mxrcd(xrcd)->xrcdn);
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;
}
static void mlx4_ib_delete_counters_table(struct mlx4_ib_dev *ibdev,
struct mlx4_ib_counters *ctr_table)
{
struct counter_index *counter, *tmp_count;
mutex_lock(&ctr_table->mutex);
list_for_each_entry_safe(counter, tmp_count, &ctr_table->counters_list,
list) {
if (counter->allocated)
mlx4_counter_free(ibdev->dev, counter->index);
list_del(&counter->list);
kfree(counter);
}
mutex_unlock(&ctr_table->mutex);
}
int mlx4_ib_add_mc(struct mlx4_ib_dev *mdev, struct mlx4_ib_qp *mqp,
union ib_gid *gid)
{
struct net_device *ndev;
int ret = 0;
if (!mqp->port)
return 0;
spin_lock_bh(&mdev->iboe.lock);
ndev = mdev->iboe.netdevs[mqp->port - 1];
if (ndev)
dev_hold(ndev);
spin_unlock_bh(&mdev->iboe.lock);
if (ndev) {
ret = 1;
dev_put(ndev);
}
return ret;
}
struct mlx4_ib_steering {
struct list_head list;
struct mlx4_flow_reg_id reg_id;
union ib_gid gid;
};
#define LAST_ETH_FIELD vlan_tag
#define LAST_IB_FIELD sl
#define LAST_IPV4_FIELD dst_ip
#define LAST_TCP_UDP_FIELD src_port
/* Field is the last supported field */
#define FIELDS_NOT_SUPPORTED(filter, field)\
memchr_inv((void *)&filter.field +\
sizeof(filter.field), 0,\
sizeof(filter) -\
offsetof(typeof(filter), field) -\
sizeof(filter.field))
static int parse_flow_attr(struct mlx4_dev *dev,
u32 qp_num,
union ib_flow_spec *ib_spec,
struct _rule_hw *mlx4_spec)
{
enum mlx4_net_trans_rule_id type;
switch (ib_spec->type) {
case IB_FLOW_SPEC_ETH:
if (FIELDS_NOT_SUPPORTED(ib_spec->eth.mask, LAST_ETH_FIELD))
return -ENOTSUPP;
type = MLX4_NET_TRANS_RULE_ID_ETH;
memcpy(mlx4_spec->eth.dst_mac, ib_spec->eth.val.dst_mac,
ETH_ALEN);
memcpy(mlx4_spec->eth.dst_mac_msk, ib_spec->eth.mask.dst_mac,
ETH_ALEN);
mlx4_spec->eth.vlan_tag = ib_spec->eth.val.vlan_tag;
mlx4_spec->eth.vlan_tag_msk = ib_spec->eth.mask.vlan_tag;
break;
case IB_FLOW_SPEC_IB:
if (FIELDS_NOT_SUPPORTED(ib_spec->ib.mask, LAST_IB_FIELD))
return -ENOTSUPP;
type = MLX4_NET_TRANS_RULE_ID_IB;
mlx4_spec->ib.l3_qpn =
cpu_to_be32(qp_num);
mlx4_spec->ib.qpn_mask =
cpu_to_be32(MLX4_IB_FLOW_QPN_MASK);
break;
case IB_FLOW_SPEC_IPV4:
if (FIELDS_NOT_SUPPORTED(ib_spec->ipv4.mask, LAST_IPV4_FIELD))
return -ENOTSUPP;
type = MLX4_NET_TRANS_RULE_ID_IPV4;
mlx4_spec->ipv4.src_ip = ib_spec->ipv4.val.src_ip;
mlx4_spec->ipv4.src_ip_msk = ib_spec->ipv4.mask.src_ip;
mlx4_spec->ipv4.dst_ip = ib_spec->ipv4.val.dst_ip;
mlx4_spec->ipv4.dst_ip_msk = ib_spec->ipv4.mask.dst_ip;
break;
case IB_FLOW_SPEC_TCP:
case IB_FLOW_SPEC_UDP:
if (FIELDS_NOT_SUPPORTED(ib_spec->tcp_udp.mask, LAST_TCP_UDP_FIELD))
return -ENOTSUPP;
type = ib_spec->type == IB_FLOW_SPEC_TCP ?
MLX4_NET_TRANS_RULE_ID_TCP :
MLX4_NET_TRANS_RULE_ID_UDP;
mlx4_spec->tcp_udp.dst_port = ib_spec->tcp_udp.val.dst_port;
mlx4_spec->tcp_udp.dst_port_msk = ib_spec->tcp_udp.mask.dst_port;
mlx4_spec->tcp_udp.src_port = ib_spec->tcp_udp.val.src_port;
mlx4_spec->tcp_udp.src_port_msk = ib_spec->tcp_udp.mask.src_port;
break;
default:
return -EINVAL;
}
if (mlx4_map_sw_to_hw_steering_id(dev, type) < 0 ||
mlx4_hw_rule_sz(dev, type) < 0)
return -EINVAL;
mlx4_spec->id = cpu_to_be16(mlx4_map_sw_to_hw_steering_id(dev, type));
mlx4_spec->size = mlx4_hw_rule_sz(dev, type) >> 2;
return mlx4_hw_rule_sz(dev, type);
}
struct default_rules {
__u32 mandatory_fields[IB_FLOW_SPEC_SUPPORT_LAYERS];
__u32 mandatory_not_fields[IB_FLOW_SPEC_SUPPORT_LAYERS];
__u32 rules_create_list[IB_FLOW_SPEC_SUPPORT_LAYERS];
__u8 link_layer;
};
static const struct default_rules default_table[] = {
{
.mandatory_fields = {IB_FLOW_SPEC_IPV4},
.mandatory_not_fields = {IB_FLOW_SPEC_ETH},
.rules_create_list = {IB_FLOW_SPEC_IB},
.link_layer = IB_LINK_LAYER_INFINIBAND
}
};
static int __mlx4_ib_default_rules_match(struct ib_qp *qp,
struct ib_flow_attr *flow_attr)
{
int i, j, k;
void *ib_flow;
const struct default_rules *pdefault_rules = default_table;
u8 link_layer = rdma_port_get_link_layer(qp->device, flow_attr->port);
for (i = 0; i < ARRAY_SIZE(default_table); i++, pdefault_rules++) {
__u32 field_types[IB_FLOW_SPEC_SUPPORT_LAYERS];
memset(&field_types, 0, sizeof(field_types));
if (link_layer != pdefault_rules->link_layer)
continue;
ib_flow = flow_attr + 1;
/* we assume the specs are sorted */
for (j = 0, k = 0; k < IB_FLOW_SPEC_SUPPORT_LAYERS &&
j < flow_attr->num_of_specs; k++) {
union ib_flow_spec *current_flow =
(union ib_flow_spec *)ib_flow;
/* same layer but different type */
if (((current_flow->type & IB_FLOW_SPEC_LAYER_MASK) ==
(pdefault_rules->mandatory_fields[k] &
IB_FLOW_SPEC_LAYER_MASK)) &&
(current_flow->type !=
pdefault_rules->mandatory_fields[k]))
goto out;
/* same layer, try match next one */
if (current_flow->type ==
pdefault_rules->mandatory_fields[k]) {
j++;
ib_flow +=
((union ib_flow_spec *)ib_flow)->size;
}
}
ib_flow = flow_attr + 1;
for (j = 0; j < flow_attr->num_of_specs;
j++, ib_flow += ((union ib_flow_spec *)ib_flow)->size)
for (k = 0; k < IB_FLOW_SPEC_SUPPORT_LAYERS; k++)
/* same layer and same type */
if (((union ib_flow_spec *)ib_flow)->type ==
pdefault_rules->mandatory_not_fields[k])
goto out;
return i;
}
out:
return -1;
}
static int __mlx4_ib_create_default_rules(
struct mlx4_ib_dev *mdev,
struct ib_qp *qp,
const struct default_rules *pdefault_rules,
struct _rule_hw *mlx4_spec) {
int size = 0;
int i;
for (i = 0; i < ARRAY_SIZE(pdefault_rules->rules_create_list); i++) {
union ib_flow_spec ib_spec = {};
int ret;
switch (pdefault_rules->rules_create_list[i]) {
case 0:
/* no rule */
continue;
case IB_FLOW_SPEC_IB:
ib_spec.type = IB_FLOW_SPEC_IB;
ib_spec.size = sizeof(struct ib_flow_spec_ib);
break;
default:
/* invalid rule */
return -EINVAL;
}
/* We must put empty rule, qpn is being ignored */
ret = parse_flow_attr(mdev->dev, 0, &ib_spec,
mlx4_spec);
if (ret < 0) {
pr_info("invalid parsing\n");
return -EINVAL;
}
mlx4_spec = (void *)mlx4_spec + ret;
size += ret;
}
return size;
}
static int __mlx4_ib_create_flow(struct ib_qp *qp, struct ib_flow_attr *flow_attr,
int domain,
enum mlx4_net_trans_promisc_mode flow_type,
u64 *reg_id)
{
int ret, i;
int size = 0;
void *ib_flow;
struct mlx4_ib_dev *mdev = to_mdev(qp->device);
struct mlx4_cmd_mailbox *mailbox;
struct mlx4_net_trans_rule_hw_ctrl *ctrl;
int default_flow;
if (flow_attr->priority > MLX4_IB_FLOW_MAX_PRIO) {
pr_err("Invalid priority value %d\n", flow_attr->priority);
return -EINVAL;
}
if (mlx4_map_sw_to_hw_steering_mode(mdev->dev, flow_type) < 0)
return -EINVAL;
mailbox = mlx4_alloc_cmd_mailbox(mdev->dev);
if (IS_ERR(mailbox))
return PTR_ERR(mailbox);
ctrl = mailbox->buf;
ctrl->prio = cpu_to_be16(domain | flow_attr->priority);
ctrl->type = mlx4_map_sw_to_hw_steering_mode(mdev->dev, flow_type);
ctrl->port = flow_attr->port;
ctrl->qpn = cpu_to_be32(qp->qp_num);
ib_flow = flow_attr + 1;
size += sizeof(struct mlx4_net_trans_rule_hw_ctrl);
/* Add default flows */
default_flow = __mlx4_ib_default_rules_match(qp, flow_attr);
if (default_flow >= 0) {
ret = __mlx4_ib_create_default_rules(
mdev, qp, default_table + default_flow,
mailbox->buf + size);
if (ret < 0) {
mlx4_free_cmd_mailbox(mdev->dev, mailbox);
return -EINVAL;
}
size += ret;
}
for (i = 0; i < flow_attr->num_of_specs; i++) {
ret = parse_flow_attr(mdev->dev, qp->qp_num, ib_flow,
mailbox->buf + size);
if (ret < 0) {
mlx4_free_cmd_mailbox(mdev->dev, mailbox);
return -EINVAL;
}
ib_flow += ((union ib_flow_spec *) ib_flow)->size;
size += ret;
}
if (mlx4_is_master(mdev->dev) && flow_type == MLX4_FS_REGULAR &&
flow_attr->num_of_specs == 1) {
struct _rule_hw *rule_header = (struct _rule_hw *)(ctrl + 1);
enum ib_flow_spec_type header_spec =
((union ib_flow_spec *)(flow_attr + 1))->type;
if (header_spec == IB_FLOW_SPEC_ETH)
mlx4_handle_eth_header_mcast_prio(ctrl, rule_header);
}
ret = mlx4_cmd_imm(mdev->dev, mailbox->dma, reg_id, size >> 2, 0,
MLX4_QP_FLOW_STEERING_ATTACH, MLX4_CMD_TIME_CLASS_A,
MLX4_CMD_NATIVE);
if (ret == -ENOMEM)
pr_err("mcg table is full. Fail to register network rule.\n");
else if (ret == -ENXIO)
pr_err("Device managed flow steering is disabled. Fail to register network rule.\n");
else if (ret)
pr_err("Invalid argument. Fail to register network rule.\n");
mlx4_free_cmd_mailbox(mdev->dev, mailbox);
return ret;
}
static int __mlx4_ib_destroy_flow(struct mlx4_dev *dev, u64 reg_id)
{
int err;
err = mlx4_cmd(dev, reg_id, 0, 0,
MLX4_QP_FLOW_STEERING_DETACH, MLX4_CMD_TIME_CLASS_A,
MLX4_CMD_NATIVE);
if (err)
pr_err("Fail to detach network rule. registration id = 0x%llx\n",
reg_id);
return err;
}
static int mlx4_ib_tunnel_steer_add(struct ib_qp *qp, struct ib_flow_attr *flow_attr,
u64 *reg_id)
{
void *ib_flow;
union ib_flow_spec *ib_spec;
struct mlx4_dev *dev = to_mdev(qp->device)->dev;
int err = 0;
if (dev->caps.tunnel_offload_mode != MLX4_TUNNEL_OFFLOAD_MODE_VXLAN ||
dev->caps.dmfs_high_steer_mode == MLX4_STEERING_DMFS_A0_STATIC)
return 0; /* do nothing */
ib_flow = flow_attr + 1;
ib_spec = (union ib_flow_spec *)ib_flow;
if (ib_spec->type != IB_FLOW_SPEC_ETH || flow_attr->num_of_specs != 1)
return 0; /* do nothing */
err = mlx4_tunnel_steer_add(to_mdev(qp->device)->dev, ib_spec->eth.val.dst_mac,
flow_attr->port, qp->qp_num,
MLX4_DOMAIN_UVERBS | (flow_attr->priority & 0xff),
reg_id);
return err;
}
static int mlx4_ib_add_dont_trap_rule(struct mlx4_dev *dev,
struct ib_flow_attr *flow_attr,
enum mlx4_net_trans_promisc_mode *type)
{
int err = 0;
if (!(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_DMFS_UC_MC_SNIFFER) ||
(dev->caps.dmfs_high_steer_mode == MLX4_STEERING_DMFS_A0_STATIC) ||
(flow_attr->num_of_specs > 1) || (flow_attr->priority != 0)) {
return -EOPNOTSUPP;
}
if (flow_attr->num_of_specs == 0) {
type[0] = MLX4_FS_MC_SNIFFER;
type[1] = MLX4_FS_UC_SNIFFER;
} else {
union ib_flow_spec *ib_spec;
ib_spec = (union ib_flow_spec *)(flow_attr + 1);
if (ib_spec->type != IB_FLOW_SPEC_ETH)
return -EINVAL;
/* if all is zero than MC and UC */
if (is_zero_ether_addr(ib_spec->eth.mask.dst_mac)) {
type[0] = MLX4_FS_MC_SNIFFER;
type[1] = MLX4_FS_UC_SNIFFER;
} else {
u8 mac[ETH_ALEN] = {ib_spec->eth.mask.dst_mac[0] ^ 0x01,
ib_spec->eth.mask.dst_mac[1],
ib_spec->eth.mask.dst_mac[2],
ib_spec->eth.mask.dst_mac[3],
ib_spec->eth.mask.dst_mac[4],
ib_spec->eth.mask.dst_mac[5]};
/* Above xor was only on MC bit, non empty mask is valid
* only if this bit is set and rest are zero.
*/
if (!is_zero_ether_addr(&mac[0]))
return -EINVAL;
if (is_multicast_ether_addr(ib_spec->eth.val.dst_mac))
type[0] = MLX4_FS_MC_SNIFFER;
else
type[0] = MLX4_FS_UC_SNIFFER;
}
}
return err;
}
static struct ib_flow *mlx4_ib_create_flow(struct ib_qp *qp,
struct ib_flow_attr *flow_attr,
struct ib_udata *udata)
{
int err = 0, i = 0, j = 0;
struct mlx4_ib_flow *mflow;
enum mlx4_net_trans_promisc_mode type[2];
struct mlx4_dev *dev = (to_mdev(qp->device))->dev;
int is_bonded = mlx4_is_bonded(dev);
if (flow_attr->flags & ~IB_FLOW_ATTR_FLAGS_DONT_TRAP)
return ERR_PTR(-EOPNOTSUPP);
if ((flow_attr->flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
(flow_attr->type != IB_FLOW_ATTR_NORMAL))
return ERR_PTR(-EOPNOTSUPP);
if (udata &&
udata->inlen && !ib_is_udata_cleared(udata, 0, udata->inlen))
return ERR_PTR(-EOPNOTSUPP);
memset(type, 0, sizeof(type));
mflow = kzalloc(sizeof(*mflow), GFP_KERNEL);
if (!mflow) {
err = -ENOMEM;
goto err_free;
}
switch (flow_attr->type) {
case IB_FLOW_ATTR_NORMAL:
/* If dont trap flag (continue match) is set, under specific
* condition traffic be replicated to given qp,
* without stealing it
*/
if (unlikely(flow_attr->flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP)) {
err = mlx4_ib_add_dont_trap_rule(dev,
flow_attr,
type);
if (err)
goto err_free;
} else {
type[0] = MLX4_FS_REGULAR;
}
break;
case IB_FLOW_ATTR_ALL_DEFAULT:
type[0] = MLX4_FS_ALL_DEFAULT;
break;
case IB_FLOW_ATTR_MC_DEFAULT:
type[0] = MLX4_FS_MC_DEFAULT;
break;
case IB_FLOW_ATTR_SNIFFER:
type[0] = MLX4_FS_MIRROR_RX_PORT;
type[1] = MLX4_FS_MIRROR_SX_PORT;
break;
default:
err = -EINVAL;
goto err_free;
}
while (i < ARRAY_SIZE(type) && type[i]) {
err = __mlx4_ib_create_flow(qp, flow_attr, MLX4_DOMAIN_UVERBS,
type[i], &mflow->reg_id[i].id);
if (err)
goto err_create_flow;
if (is_bonded) {
/* Application always sees one port so the mirror rule
* must be on port #2
*/
flow_attr->port = 2;
err = __mlx4_ib_create_flow(qp, flow_attr,
MLX4_DOMAIN_UVERBS, type[j],
&mflow->reg_id[j].mirror);
flow_attr->port = 1;
if (err)
goto err_create_flow;
j++;
}
i++;
}
if (i < ARRAY_SIZE(type) && flow_attr->type == IB_FLOW_ATTR_NORMAL) {
err = mlx4_ib_tunnel_steer_add(qp, flow_attr,
&mflow->reg_id[i].id);
if (err)
goto err_create_flow;
if (is_bonded) {
flow_attr->port = 2;
err = mlx4_ib_tunnel_steer_add(qp, flow_attr,
&mflow->reg_id[j].mirror);
flow_attr->port = 1;
if (err)
goto err_create_flow;
j++;
}
/* function to create mirror rule */
i++;
}
return &mflow->ibflow;
err_create_flow:
while (i) {
(void)__mlx4_ib_destroy_flow(to_mdev(qp->device)->dev,
mflow->reg_id[i].id);
i--;
}
while (j) {
(void)__mlx4_ib_destroy_flow(to_mdev(qp->device)->dev,
mflow->reg_id[j].mirror);
j--;
}
err_free:
kfree(mflow);
return ERR_PTR(err);
}
static int mlx4_ib_destroy_flow(struct ib_flow *flow_id)
{
int err, ret = 0;
int i = 0;
struct mlx4_ib_dev *mdev = to_mdev(flow_id->qp->device);
struct mlx4_ib_flow *mflow = to_mflow(flow_id);
while (i < ARRAY_SIZE(mflow->reg_id) && mflow->reg_id[i].id) {
err = __mlx4_ib_destroy_flow(mdev->dev, mflow->reg_id[i].id);
if (err)
ret = err;
if (mflow->reg_id[i].mirror) {
err = __mlx4_ib_destroy_flow(mdev->dev,
mflow->reg_id[i].mirror);
if (err)
ret = err;
}
i++;
}
kfree(mflow);
return ret;
}
static int mlx4_ib_mcg_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
{
int err;
struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
struct mlx4_dev *dev = mdev->dev;
struct mlx4_ib_qp *mqp = to_mqp(ibqp);
struct mlx4_ib_steering *ib_steering = NULL;
enum mlx4_protocol prot = MLX4_PROT_IB_IPV6;
struct mlx4_flow_reg_id reg_id;
if (mdev->dev->caps.steering_mode ==
MLX4_STEERING_MODE_DEVICE_MANAGED) {
ib_steering = kmalloc(sizeof(*ib_steering), GFP_KERNEL);
if (!ib_steering)
return -ENOMEM;
}
err = mlx4_multicast_attach(mdev->dev, &mqp->mqp, gid->raw, mqp->port,
!!(mqp->flags &
MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK),
prot, &reg_id.id);
if (err) {
pr_err("multicast attach op failed, err %d\n", err);
goto err_malloc;
}
reg_id.mirror = 0;
if (mlx4_is_bonded(dev)) {
err = mlx4_multicast_attach(mdev->dev, &mqp->mqp, gid->raw,
(mqp->port == 1) ? 2 : 1,
!!(mqp->flags &
MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK),
prot, &reg_id.mirror);
if (err)
goto err_add;
}
err = add_gid_entry(ibqp, gid);
if (err)
goto err_add;
if (ib_steering) {
memcpy(ib_steering->gid.raw, gid->raw, 16);
ib_steering->reg_id = reg_id;
mutex_lock(&mqp->mutex);
list_add(&ib_steering->list, &mqp->steering_rules);
mutex_unlock(&mqp->mutex);
}
return 0;
err_add:
mlx4_multicast_detach(mdev->dev, &mqp->mqp, gid->raw,
prot, reg_id.id);
if (reg_id.mirror)
mlx4_multicast_detach(mdev->dev, &mqp->mqp, gid->raw,
prot, reg_id.mirror);
err_malloc:
kfree(ib_steering);
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)
{
int err;
struct mlx4_ib_dev *mdev = to_mdev(ibqp->device);
struct mlx4_dev *dev = mdev->dev;
struct mlx4_ib_qp *mqp = to_mqp(ibqp);
struct net_device *ndev;
struct mlx4_ib_gid_entry *ge;
struct mlx4_flow_reg_id reg_id = {0, 0};
enum mlx4_protocol prot = MLX4_PROT_IB_IPV6;
if (mdev->dev->caps.steering_mode ==
MLX4_STEERING_MODE_DEVICE_MANAGED) {
struct mlx4_ib_steering *ib_steering;
mutex_lock(&mqp->mutex);
list_for_each_entry(ib_steering, &mqp->steering_rules, list) {
if (!memcmp(ib_steering->gid.raw, gid->raw, 16)) {
list_del(&ib_steering->list);
break;
}
}
mutex_unlock(&mqp->mutex);
if (&ib_steering->list == &mqp->steering_rules) {
pr_err("Couldn't find reg_id for mgid. Steering rule is left attached\n");
return -EINVAL;
}
reg_id = ib_steering->reg_id;
kfree(ib_steering);
}
err = mlx4_multicast_detach(mdev->dev, &mqp->mqp, gid->raw,
prot, reg_id.id);
if (err)
return err;
if (mlx4_is_bonded(dev)) {
err = mlx4_multicast_detach(mdev->dev, &mqp->mqp, gid->raw,
prot, reg_id.mirror);
if (err)
return err;
}
mutex_lock(&mqp->mutex);
ge = find_gid_entry(mqp, gid->raw);
if (ge) {
spin_lock_bh(&mdev->iboe.lock);
ndev = ge->added ? mdev->iboe.netdevs[ge->port - 1] : NULL;
if (ndev)
dev_hold(ndev);
spin_unlock_bh(&mdev->iboe.lock);
if (ndev)
dev_put(ndev);
list_del(&ge->list);
kfree(ge);
} else
pr_warn("could not find mgid entry\n");
mutex_unlock(&mqp->mutex);
return 0;
}
static int init_node_data(struct mlx4_ib_dev *dev)
{
struct ib_smp *in_mad = NULL;
struct ib_smp *out_mad = NULL;
int mad_ifc_flags = MLX4_MAD_IFC_IGNORE_KEYS;
int err = -ENOMEM;
in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
if (!in_mad || !out_mad)
goto out;
ib_init_query_mad(in_mad);
in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
if (mlx4_is_master(dev->dev))
mad_ifc_flags |= MLX4_MAD_IFC_NET_VIEW;
err = mlx4_MAD_IFC(dev, mad_ifc_flags, 1, NULL, NULL, in_mad, out_mad);
if (err)
goto out;
memcpy(dev->ib_dev.node_desc, out_mad->data, IB_DEVICE_NODE_DESC_MAX);
in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
err = mlx4_MAD_IFC(dev, mad_ifc_flags, 1, NULL, NULL, in_mad, out_mad);
if (err)
goto out;
dev->dev->rev_id = be32_to_cpup((__be32 *) (out_mad->data + 32));
memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);
out:
kfree(in_mad);
kfree(out_mad);
return err;
}
static ssize_t hca_type_show(struct device *device,
struct device_attribute *attr, char *buf)
{
struct mlx4_ib_dev *dev =
rdma_device_to_drv_device(device, struct mlx4_ib_dev, ib_dev);
return sysfs_emit(buf, "MT%d\n", dev->dev->persist->pdev->device);
}
static DEVICE_ATTR_RO(hca_type);
static ssize_t hw_rev_show(struct device *device,
struct device_attribute *attr, char *buf)
{
struct mlx4_ib_dev *dev =
rdma_device_to_drv_device(device, struct mlx4_ib_dev, ib_dev);
return sysfs_emit(buf, "%x\n", dev->dev->rev_id);
}
static DEVICE_ATTR_RO(hw_rev);
static ssize_t board_id_show(struct device *device,
struct device_attribute *attr, char *buf)
{
struct mlx4_ib_dev *dev =
rdma_device_to_drv_device(device, struct mlx4_ib_dev, ib_dev);
return sysfs_emit(buf, "%.*s\n", MLX4_BOARD_ID_LEN, dev->dev->board_id);
}
static DEVICE_ATTR_RO(board_id);
static struct attribute *mlx4_class_attributes[] = {
&dev_attr_hw_rev.attr,
&dev_attr_hca_type.attr,
&dev_attr_board_id.attr,
NULL
};
static const struct attribute_group mlx4_attr_group = {
.attrs = mlx4_class_attributes,
};
struct diag_counter {
const char *name;
u32 offset;
};
#define DIAG_COUNTER(_name, _offset) \
{ .name = #_name, .offset = _offset }
static const struct diag_counter diag_basic[] = {
DIAG_COUNTER(rq_num_lle, 0x00),
DIAG_COUNTER(sq_num_lle, 0x04),
DIAG_COUNTER(rq_num_lqpoe, 0x08),
DIAG_COUNTER(sq_num_lqpoe, 0x0C),
DIAG_COUNTER(rq_num_lpe, 0x18),
DIAG_COUNTER(sq_num_lpe, 0x1C),
DIAG_COUNTER(rq_num_wrfe, 0x20),
DIAG_COUNTER(sq_num_wrfe, 0x24),
DIAG_COUNTER(sq_num_mwbe, 0x2C),
DIAG_COUNTER(sq_num_bre, 0x34),
DIAG_COUNTER(sq_num_rire, 0x44),
DIAG_COUNTER(rq_num_rire, 0x48),
DIAG_COUNTER(sq_num_rae, 0x4C),
DIAG_COUNTER(rq_num_rae, 0x50),
DIAG_COUNTER(sq_num_roe, 0x54),
DIAG_COUNTER(sq_num_tree, 0x5C),
DIAG_COUNTER(sq_num_rree, 0x64),
DIAG_COUNTER(rq_num_rnr, 0x68),
DIAG_COUNTER(sq_num_rnr, 0x6C),
DIAG_COUNTER(rq_num_oos, 0x100),
DIAG_COUNTER(sq_num_oos, 0x104),
};
static const struct diag_counter diag_ext[] = {
DIAG_COUNTER(rq_num_dup, 0x130),
DIAG_COUNTER(sq_num_to, 0x134),
};
static const struct diag_counter diag_device_only[] = {
DIAG_COUNTER(num_cqovf, 0x1A0),
DIAG_COUNTER(rq_num_udsdprd, 0x118),
};
static struct rdma_hw_stats *
mlx4_ib_alloc_hw_device_stats(struct ib_device *ibdev)
{
struct mlx4_ib_dev *dev = to_mdev(ibdev);
struct mlx4_ib_diag_counters *diag = dev->diag_counters;
if (!diag[0].descs)
return NULL;
return rdma_alloc_hw_stats_struct(diag[0].descs, diag[0].num_counters,
RDMA_HW_STATS_DEFAULT_LIFESPAN);
}
static struct rdma_hw_stats *
mlx4_ib_alloc_hw_port_stats(struct ib_device *ibdev, u32 port_num)
{
struct mlx4_ib_dev *dev = to_mdev(ibdev);
struct mlx4_ib_diag_counters *diag = dev->diag_counters;
if (!diag[1].descs)
return NULL;
return rdma_alloc_hw_stats_struct(diag[1].descs, diag[1].num_counters,
RDMA_HW_STATS_DEFAULT_LIFESPAN);
}
static int mlx4_ib_get_hw_stats(struct ib_device *ibdev,
struct rdma_hw_stats *stats,
u32 port, int index)
{
struct mlx4_ib_dev *dev = to_mdev(ibdev);
struct mlx4_ib_diag_counters *diag = dev->diag_counters;
u32 hw_value[ARRAY_SIZE(diag_device_only) +
ARRAY_SIZE(diag_ext) + ARRAY_SIZE(diag_basic)] = {};
int ret;
int i;
ret = mlx4_query_diag_counters(dev->dev,
MLX4_OP_MOD_QUERY_TRANSPORT_CI_ERRORS,
diag[!!port].offset, hw_value,
diag[!!port].num_counters, port);
if (ret)
return ret;
for (i = 0; i < diag[!!port].num_counters; i++)
stats->value[i] = hw_value[i];
return diag[!!port].num_counters;
}
static int __mlx4_ib_alloc_diag_counters(struct mlx4_ib_dev *ibdev,
struct rdma_stat_desc **pdescs,
u32 **offset, u32 *num, bool port)
{
u32 num_counters;
num_counters = ARRAY_SIZE(diag_basic);
if (ibdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_DIAG_PER_PORT)
num_counters += ARRAY_SIZE(diag_ext);
if (!port)
num_counters += ARRAY_SIZE(diag_device_only);
*pdescs = kcalloc(num_counters, sizeof(struct rdma_stat_desc),
GFP_KERNEL);
if (!*pdescs)
return -ENOMEM;
*offset = kcalloc(num_counters, sizeof(**offset), GFP_KERNEL);
if (!*offset)
goto err;
*num = num_counters;
return 0;
err:
kfree(*pdescs);
return -ENOMEM;
}
static void mlx4_ib_fill_diag_counters(struct mlx4_ib_dev *ibdev,
struct rdma_stat_desc *descs,
u32 *offset, bool port)
{
int i;
int j;
for (i = 0, j = 0; i < ARRAY_SIZE(diag_basic); i++, j++) {
descs[i].name = diag_basic[i].name;
offset[i] = diag_basic[i].offset;
}
if (ibdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_DIAG_PER_PORT) {
for (i = 0; i < ARRAY_SIZE(diag_ext); i++, j++) {
descs[j].name = diag_ext[i].name;
offset[j] = diag_ext[i].offset;
}
}
if (!port) {
for (i = 0; i < ARRAY_SIZE(diag_device_only); i++, j++) {
descs[j].name = diag_device_only[i].name;
offset[j] = diag_device_only[i].offset;
}
}
}
static const struct ib_device_ops mlx4_ib_hw_stats_ops = {
.alloc_hw_device_stats = mlx4_ib_alloc_hw_device_stats,
.alloc_hw_port_stats = mlx4_ib_alloc_hw_port_stats,
.get_hw_stats = mlx4_ib_get_hw_stats,
};
static const struct ib_device_ops mlx4_ib_hw_stats_ops1 = {
.alloc_hw_device_stats = mlx4_ib_alloc_hw_device_stats,
.get_hw_stats = mlx4_ib_get_hw_stats,
};
static int mlx4_ib_alloc_diag_counters(struct mlx4_ib_dev *ibdev)
{
struct mlx4_ib_diag_counters *diag = ibdev->diag_counters;
int i;
int ret;
bool per_port = !!(ibdev->dev->caps.flags2 &
MLX4_DEV_CAP_FLAG2_DIAG_PER_PORT);
if (mlx4_is_slave(ibdev->dev))
return 0;
for (i = 0; i < MLX4_DIAG_COUNTERS_TYPES; i++) {
/*
* i == 1 means we are building port counters, set a different
* stats ops without port stats callback.
*/
if (i && !per_port) {
ib_set_device_ops(&ibdev->ib_dev,
&mlx4_ib_hw_stats_ops1);
return 0;
}
ret = __mlx4_ib_alloc_diag_counters(ibdev, &diag[i].descs,
&diag[i].offset,
&diag[i].num_counters, i);
if (ret)
goto err_alloc;
mlx4_ib_fill_diag_counters(ibdev, diag[i].descs,
diag[i].offset, i);
}
ib_set_device_ops(&ibdev->ib_dev, &mlx4_ib_hw_stats_ops);
return 0;
err_alloc:
if (i) {
kfree(diag[i - 1].descs);
kfree(diag[i - 1].offset);
}
return ret;
}
static void mlx4_ib_diag_cleanup(struct mlx4_ib_dev *ibdev)
{
int i;
for (i = 0; i < MLX4_DIAG_COUNTERS_TYPES; i++) {
kfree(ibdev->diag_counters[i].offset);
kfree(ibdev->diag_counters[i].descs);
}
}
#define MLX4_IB_INVALID_MAC ((u64)-1)
static void mlx4_ib_update_qps(struct mlx4_ib_dev *ibdev,
struct net_device *dev,
int port)
{
u64 new_smac = 0;
u64 release_mac = MLX4_IB_INVALID_MAC;
struct mlx4_ib_qp *qp;
new_smac = ether_addr_to_u64(dev->dev_addr);
atomic64_set(&ibdev->iboe.mac[port - 1], new_smac);
/* no need for update QP1 and mac registration in non-SRIOV */
if (!mlx4_is_mfunc(ibdev->dev))
return;
mutex_lock(&ibdev->qp1_proxy_lock[port - 1]);
qp = ibdev->qp1_proxy[port - 1];
if (qp) {
int new_smac_index;
u64 old_smac;
struct mlx4_update_qp_params update_params;
mutex_lock(&qp->mutex);
old_smac = qp->pri.smac;
if (new_smac == old_smac)
goto unlock;
new_smac_index = mlx4_register_mac(ibdev->dev, port, new_smac);
if (new_smac_index < 0)
goto unlock;
update_params.smac_index = new_smac_index;
if (mlx4_update_qp(ibdev->dev, qp->mqp.qpn, MLX4_UPDATE_QP_SMAC,
&update_params)) {
release_mac = new_smac;
goto unlock;
}
/* if old port was zero, no mac was yet registered for this QP */
if (qp->pri.smac_port)
release_mac = old_smac;
qp->pri.smac = new_smac;
qp->pri.smac_port = port;
qp->pri.smac_index = new_smac_index;
}
unlock:
if (release_mac != MLX4_IB_INVALID_MAC)
mlx4_unregister_mac(ibdev->dev, port, release_mac);
if (qp)
mutex_unlock(&qp->mutex);
mutex_unlock(&ibdev->qp1_proxy_lock[port - 1]);
}
static void mlx4_ib_scan_netdevs(struct mlx4_ib_dev *ibdev,
struct net_device *dev,
unsigned long event)
{
struct mlx4_ib_iboe *iboe;
int update_qps_port = -1;
int port;
ASSERT_RTNL();
iboe = &ibdev->iboe;
spin_lock_bh(&iboe->lock);
mlx4_foreach_ib_transport_port(port, ibdev->dev) {
iboe->netdevs[port - 1] =
mlx4_get_protocol_dev(ibdev->dev, MLX4_PROT_ETH, port);
if (dev == iboe->netdevs[port - 1] &&
(event == NETDEV_CHANGEADDR || event == NETDEV_REGISTER ||
event == NETDEV_UP || event == NETDEV_CHANGE))
update_qps_port = port;
if (dev == iboe->netdevs[port - 1] &&
(event == NETDEV_UP || event == NETDEV_DOWN)) {
enum ib_port_state port_state;
struct ib_event ibev = { };
if (ib_get_cached_port_state(&ibdev->ib_dev, port,
&port_state))
continue;
if (event == NETDEV_UP &&
(port_state != IB_PORT_ACTIVE ||
iboe->last_port_state[port - 1] != IB_PORT_DOWN))
continue;
if (event == NETDEV_DOWN &&
(port_state != IB_PORT_DOWN ||
iboe->last_port_state[port - 1] != IB_PORT_ACTIVE))
continue;
iboe->last_port_state[port - 1] = port_state;
ibev.device = &ibdev->ib_dev;
ibev.element.port_num = port;
ibev.event = event == NETDEV_UP ? IB_EVENT_PORT_ACTIVE :
IB_EVENT_PORT_ERR;
ib_dispatch_event(&ibev);
}
}
spin_unlock_bh(&iboe->lock);
if (update_qps_port > 0)
mlx4_ib_update_qps(ibdev, dev, update_qps_port);
}
static int mlx4_ib_netdev_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct mlx4_ib_dev *ibdev;
if (!net_eq(dev_net(dev), &init_net))
return NOTIFY_DONE;
ibdev = container_of(this, struct mlx4_ib_dev, iboe.nb);
mlx4_ib_scan_netdevs(ibdev, dev, event);
return NOTIFY_DONE;
}
static void init_pkeys(struct mlx4_ib_dev *ibdev)
{
int port;
int slave;
int i;
if (mlx4_is_master(ibdev->dev)) {
for (slave = 0; slave <= ibdev->dev->persist->num_vfs;
++slave) {
for (port = 1; port <= ibdev->dev->caps.num_ports; ++port) {
for (i = 0;
i < ibdev->dev->phys_caps.pkey_phys_table_len[port];
++i) {
ibdev->pkeys.virt2phys_pkey[slave][port - 1][i] =
/* master has the identity virt2phys pkey mapping */
(slave == mlx4_master_func_num(ibdev->dev) || !i) ? i :
ibdev->dev->phys_caps.pkey_phys_table_len[port] - 1;
mlx4_sync_pkey_table(ibdev->dev, slave, port, i,
ibdev->pkeys.virt2phys_pkey[slave][port - 1][i]);
}
}
}
/* initialize pkey cache */
for (port = 1; port <= ibdev->dev->caps.num_ports; ++port) {
for (i = 0;
i < ibdev->dev->phys_caps.pkey_phys_table_len[port];
++i)
ibdev->pkeys.phys_pkey_cache[port-1][i] =
(i) ? 0 : 0xFFFF;
}
}
}
static void mlx4_ib_alloc_eqs(struct mlx4_dev *dev, struct mlx4_ib_dev *ibdev)
{
int i, j, eq = 0, total_eqs = 0;
ibdev->eq_table = kcalloc(dev->caps.num_comp_vectors,
sizeof(ibdev->eq_table[0]), GFP_KERNEL);
if (!ibdev->eq_table)
return;
for (i = 1; i <= dev->caps.num_ports; i++) {
for (j = 0; j < mlx4_get_eqs_per_port(dev, i);
j++, total_eqs++) {
if (i > 1 && mlx4_is_eq_shared(dev, total_eqs))
continue;
ibdev->eq_table[eq] = total_eqs;
if (!mlx4_assign_eq(dev, i,
&ibdev->eq_table[eq]))
eq++;
else
ibdev->eq_table[eq] = -1;
}
}
for (i = eq; i < dev->caps.num_comp_vectors;
ibdev->eq_table[i++] = -1)
;
/* Advertise the new number of EQs to clients */
ibdev->ib_dev.num_comp_vectors = eq;
}
static void mlx4_ib_free_eqs(struct mlx4_dev *dev, struct mlx4_ib_dev *ibdev)
{
int i;
int total_eqs = ibdev->ib_dev.num_comp_vectors;
/* no eqs were allocated */
if (!ibdev->eq_table)
return;
/* Reset the advertised EQ number */
ibdev->ib_dev.num_comp_vectors = 0;
for (i = 0; i < total_eqs; i++)
mlx4_release_eq(dev, ibdev->eq_table[i]);
kfree(ibdev->eq_table);
ibdev->eq_table = NULL;
}
static int mlx4_port_immutable(struct ib_device *ibdev, u32 port_num,
struct ib_port_immutable *immutable)
{
struct ib_port_attr attr;
struct mlx4_ib_dev *mdev = to_mdev(ibdev);
int err;
if (mlx4_ib_port_link_layer(ibdev, port_num) == IB_LINK_LAYER_INFINIBAND) {
immutable->core_cap_flags = RDMA_CORE_PORT_IBA_IB;
immutable->max_mad_size = IB_MGMT_MAD_SIZE;
} else {
if (mdev->dev->caps.flags & MLX4_DEV_CAP_FLAG_IBOE)
immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE;
if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_ROCE_V1_V2)
immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE |
RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
immutable->core_cap_flags |= RDMA_CORE_PORT_RAW_PACKET;
if (immutable->core_cap_flags & (RDMA_CORE_PORT_IBA_ROCE |
RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP))
immutable->max_mad_size = IB_MGMT_MAD_SIZE;
}
err = ib_query_port(ibdev, port_num, &attr);
if (err)
return err;
immutable->pkey_tbl_len = attr.pkey_tbl_len;
immutable->gid_tbl_len = attr.gid_tbl_len;
return 0;
}
static void get_fw_ver_str(struct ib_device *device, char *str)
{
struct mlx4_ib_dev *dev =
container_of(device, struct mlx4_ib_dev, ib_dev);
snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d",
(int) (dev->dev->caps.fw_ver >> 32),
(int) (dev->dev->caps.fw_ver >> 16) & 0xffff,
(int) dev->dev->caps.fw_ver & 0xffff);
}
static const struct ib_device_ops mlx4_ib_dev_ops = {
.owner = THIS_MODULE,
.driver_id = RDMA_DRIVER_MLX4,
.uverbs_abi_ver = MLX4_IB_UVERBS_ABI_VERSION,
.add_gid = mlx4_ib_add_gid,
.alloc_mr = mlx4_ib_alloc_mr,
.alloc_pd = mlx4_ib_alloc_pd,
.alloc_ucontext = mlx4_ib_alloc_ucontext,
.attach_mcast = mlx4_ib_mcg_attach,
.create_ah = mlx4_ib_create_ah,
.create_cq = mlx4_ib_create_cq,
.create_qp = mlx4_ib_create_qp,
.create_srq = mlx4_ib_create_srq,
.dealloc_pd = mlx4_ib_dealloc_pd,
.dealloc_ucontext = mlx4_ib_dealloc_ucontext,
.del_gid = mlx4_ib_del_gid,
.dereg_mr = mlx4_ib_dereg_mr,
.destroy_ah = mlx4_ib_destroy_ah,
.destroy_cq = mlx4_ib_destroy_cq,
.destroy_qp = mlx4_ib_destroy_qp,
.destroy_srq = mlx4_ib_destroy_srq,
.detach_mcast = mlx4_ib_mcg_detach,
.device_group = &mlx4_attr_group,
.disassociate_ucontext = mlx4_ib_disassociate_ucontext,
.drain_rq = mlx4_ib_drain_rq,
.drain_sq = mlx4_ib_drain_sq,
.get_dev_fw_str = get_fw_ver_str,
.get_dma_mr = mlx4_ib_get_dma_mr,
.get_link_layer = mlx4_ib_port_link_layer,
.get_netdev = mlx4_ib_get_netdev,
.get_port_immutable = mlx4_port_immutable,
.map_mr_sg = mlx4_ib_map_mr_sg,
.mmap = mlx4_ib_mmap,
.modify_cq = mlx4_ib_modify_cq,
.modify_device = mlx4_ib_modify_device,
.modify_port = mlx4_ib_modify_port,
.modify_qp = mlx4_ib_modify_qp,
.modify_srq = mlx4_ib_modify_srq,
.poll_cq = mlx4_ib_poll_cq,
.post_recv = mlx4_ib_post_recv,
.post_send = mlx4_ib_post_send,
.post_srq_recv = mlx4_ib_post_srq_recv,
.process_mad = mlx4_ib_process_mad,
.query_ah = mlx4_ib_query_ah,
.query_device = mlx4_ib_query_device,
.query_gid = mlx4_ib_query_gid,
.query_pkey = mlx4_ib_query_pkey,
.query_port = mlx4_ib_query_port,
.query_qp = mlx4_ib_query_qp,
.query_srq = mlx4_ib_query_srq,
.reg_user_mr = mlx4_ib_reg_user_mr,
.req_notify_cq = mlx4_ib_arm_cq,
.rereg_user_mr = mlx4_ib_rereg_user_mr,
.resize_cq = mlx4_ib_resize_cq,
INIT_RDMA_OBJ_SIZE(ib_ah, mlx4_ib_ah, ibah),
INIT_RDMA_OBJ_SIZE(ib_cq, mlx4_ib_cq, ibcq),
INIT_RDMA_OBJ_SIZE(ib_pd, mlx4_ib_pd, ibpd),
INIT_RDMA_OBJ_SIZE(ib_qp, mlx4_ib_qp, ibqp),
INIT_RDMA_OBJ_SIZE(ib_srq, mlx4_ib_srq, ibsrq),
INIT_RDMA_OBJ_SIZE(ib_ucontext, mlx4_ib_ucontext, ibucontext),
};
static const struct ib_device_ops mlx4_ib_dev_wq_ops = {
.create_rwq_ind_table = mlx4_ib_create_rwq_ind_table,
.create_wq = mlx4_ib_create_wq,
.destroy_rwq_ind_table = mlx4_ib_destroy_rwq_ind_table,
.destroy_wq = mlx4_ib_destroy_wq,
.modify_wq = mlx4_ib_modify_wq,
INIT_RDMA_OBJ_SIZE(ib_rwq_ind_table, mlx4_ib_rwq_ind_table,
ib_rwq_ind_tbl),
};
static const struct ib_device_ops mlx4_ib_dev_mw_ops = {
.alloc_mw = mlx4_ib_alloc_mw,
.dealloc_mw = mlx4_ib_dealloc_mw,
INIT_RDMA_OBJ_SIZE(ib_mw, mlx4_ib_mw, ibmw),
};
static const struct ib_device_ops mlx4_ib_dev_xrc_ops = {
.alloc_xrcd = mlx4_ib_alloc_xrcd,
.dealloc_xrcd = mlx4_ib_dealloc_xrcd,
INIT_RDMA_OBJ_SIZE(ib_xrcd, mlx4_ib_xrcd, ibxrcd),
};
static const struct ib_device_ops mlx4_ib_dev_fs_ops = {
.create_flow = mlx4_ib_create_flow,
.destroy_flow = mlx4_ib_destroy_flow,
};
static void *mlx4_ib_add(struct mlx4_dev *dev)
{
struct mlx4_ib_dev *ibdev;
int num_ports = 0;
int i, j;
int err;
struct mlx4_ib_iboe *iboe;
int ib_num_ports = 0;
int num_req_counters;
int allocated;
u32 counter_index;
struct counter_index *new_counter_index = NULL;
pr_info_once("%s", mlx4_ib_version);
num_ports = 0;
mlx4_foreach_ib_transport_port(i, dev)
num_ports++;
/* No point in registering a device with no ports... */
if (num_ports == 0)
return NULL;
ibdev = ib_alloc_device(mlx4_ib_dev, ib_dev);
if (!ibdev) {
dev_err(&dev->persist->pdev->dev,
"Device struct alloc failed\n");
return NULL;
}
iboe = &ibdev->iboe;
if (mlx4_pd_alloc(dev, &ibdev->priv_pdn))
goto err_dealloc;
if (mlx4_uar_alloc(dev, &ibdev->priv_uar))
goto err_pd;
ibdev->uar_map = ioremap((phys_addr_t) ibdev->priv_uar.pfn << PAGE_SHIFT,
PAGE_SIZE);
if (!ibdev->uar_map)
goto err_uar;
MLX4_INIT_DOORBELL_LOCK(&ibdev->uar_lock);
ibdev->dev = dev;
ibdev->bond_next_port = 0;
ibdev->ib_dev.node_type = RDMA_NODE_IB_CA;
ibdev->ib_dev.local_dma_lkey = dev->caps.reserved_lkey;
ibdev->num_ports = num_ports;
ibdev->ib_dev.phys_port_cnt = mlx4_is_bonded(dev) ?
1 : ibdev->num_ports;
ibdev->ib_dev.num_comp_vectors = dev->caps.num_comp_vectors;
ibdev->ib_dev.dev.parent = &dev->persist->pdev->dev;
ib_set_device_ops(&ibdev->ib_dev, &mlx4_ib_dev_ops);
if ((dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_RSS) &&
((mlx4_ib_port_link_layer(&ibdev->ib_dev, 1) ==
IB_LINK_LAYER_ETHERNET) ||
(mlx4_ib_port_link_layer(&ibdev->ib_dev, 2) ==
IB_LINK_LAYER_ETHERNET)))
ib_set_device_ops(&ibdev->ib_dev, &mlx4_ib_dev_wq_ops);
if (dev->caps.flags & MLX4_DEV_CAP_FLAG_MEM_WINDOW ||
dev->caps.bmme_flags & MLX4_BMME_FLAG_TYPE_2_WIN)
ib_set_device_ops(&ibdev->ib_dev, &mlx4_ib_dev_mw_ops);
if (dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC) {
ib_set_device_ops(&ibdev->ib_dev, &mlx4_ib_dev_xrc_ops);
}
if (check_flow_steering_support(dev)) {
ibdev->steering_support = MLX4_STEERING_MODE_DEVICE_MANAGED;
ib_set_device_ops(&ibdev->ib_dev, &mlx4_ib_dev_fs_ops);
}
if (!dev->caps.userspace_caps)
ibdev->ib_dev.ops.uverbs_abi_ver =
MLX4_IB_UVERBS_NO_DEV_CAPS_ABI_VERSION;
mlx4_ib_alloc_eqs(dev, ibdev);
spin_lock_init(&iboe->lock);
if (init_node_data(ibdev))
goto err_map;
mlx4_init_sl2vl_tbl(ibdev);
for (i = 0; i < ibdev->num_ports; ++i) {
mutex_init(&ibdev->counters_table[i].mutex);
INIT_LIST_HEAD(&ibdev->counters_table[i].counters_list);
iboe->last_port_state[i] = IB_PORT_DOWN;
}
num_req_counters = mlx4_is_bonded(dev) ? 1 : ibdev->num_ports;
for (i = 0; i < num_req_counters; ++i) {
mutex_init(&ibdev->qp1_proxy_lock[i]);
allocated = 0;
if (mlx4_ib_port_link_layer(&ibdev->ib_dev, i + 1) ==
IB_LINK_LAYER_ETHERNET) {
err = mlx4_counter_alloc(ibdev->dev, &counter_index,
MLX4_RES_USAGE_DRIVER);
/* if failed to allocate a new counter, use default */
if (err)
counter_index =
mlx4_get_default_counter_index(dev,
i + 1);
else
allocated = 1;
} else { /* IB_LINK_LAYER_INFINIBAND use the default counter */
counter_index = mlx4_get_default_counter_index(dev,
i + 1);
}
new_counter_index = kmalloc(sizeof(*new_counter_index),
GFP_KERNEL);
if (!new_counter_index) {
if (allocated)
mlx4_counter_free(ibdev->dev, counter_index);
goto err_counter;
}
new_counter_index->index = counter_index;
new_counter_index->allocated = allocated;
list_add_tail(&new_counter_index->list,
&ibdev->counters_table[i].counters_list);
ibdev->counters_table[i].default_counter = counter_index;
pr_info("counter index %d for port %d allocated %d\n",
counter_index, i + 1, allocated);
}
if (mlx4_is_bonded(dev))
for (i = 1; i < ibdev->num_ports ; ++i) {
new_counter_index =
kmalloc(sizeof(struct counter_index),
GFP_KERNEL);
if (!new_counter_index)
goto err_counter;
new_counter_index->index = counter_index;
new_counter_index->allocated = 0;
list_add_tail(&new_counter_index->list,
&ibdev->counters_table[i].counters_list);
ibdev->counters_table[i].default_counter =
counter_index;
}
mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB)
ib_num_ports++;
spin_lock_init(&ibdev->sm_lock);
mutex_init(&ibdev->cap_mask_mutex);
INIT_LIST_HEAD(&ibdev->qp_list);
spin_lock_init(&ibdev->reset_flow_resource_lock);
if (ibdev->steering_support == MLX4_STEERING_MODE_DEVICE_MANAGED &&
ib_num_ports) {
ibdev->steer_qpn_count = MLX4_IB_UC_MAX_NUM_QPS;
err = mlx4_qp_reserve_range(dev, ibdev->steer_qpn_count,
MLX4_IB_UC_STEER_QPN_ALIGN,
&ibdev->steer_qpn_base, 0,
MLX4_RES_USAGE_DRIVER);
if (err)
goto err_counter;
ibdev->ib_uc_qpns_bitmap = bitmap_alloc(ibdev->steer_qpn_count,
GFP_KERNEL);
if (!ibdev->ib_uc_qpns_bitmap)
goto err_steer_qp_release;
if (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_DMFS_IPOIB) {
bitmap_zero(ibdev->ib_uc_qpns_bitmap,
ibdev->steer_qpn_count);
err = mlx4_FLOW_STEERING_IB_UC_QP_RANGE(
dev, ibdev->steer_qpn_base,
ibdev->steer_qpn_base +
ibdev->steer_qpn_count - 1);
if (err)
goto err_steer_free_bitmap;
} else {
bitmap_fill(ibdev->ib_uc_qpns_bitmap,
ibdev->steer_qpn_count);
}
}
for (j = 1; j <= ibdev->dev->caps.num_ports; j++)
atomic64_set(&iboe->mac[j - 1], ibdev->dev->caps.def_mac[j]);
if (mlx4_ib_alloc_diag_counters(ibdev))
goto err_steer_free_bitmap;
if (ib_register_device(&ibdev->ib_dev, "mlx4_%d",
&dev->persist->pdev->dev))
goto err_diag_counters;
if (mlx4_ib_mad_init(ibdev))
goto err_reg;
if (mlx4_ib_init_sriov(ibdev))
goto err_mad;
if (!iboe->nb.notifier_call) {
iboe->nb.notifier_call = mlx4_ib_netdev_event;
err = register_netdevice_notifier(&iboe->nb);
if (err) {
iboe->nb.notifier_call = NULL;
goto err_notif;
}
}
if (dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_ROCE_V1_V2) {
err = mlx4_config_roce_v2_port(dev, ROCE_V2_UDP_DPORT);
if (err)
goto err_notif;
}
ibdev->ib_active = true;
mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB)
devlink_port_type_ib_set(mlx4_get_devlink_port(dev, i),
&ibdev->ib_dev);
if (mlx4_is_mfunc(ibdev->dev))
init_pkeys(ibdev);
/* create paravirt contexts for any VFs which are active */
if (mlx4_is_master(ibdev->dev)) {
for (j = 0; j < MLX4_MFUNC_MAX; j++) {
if (j == mlx4_master_func_num(ibdev->dev))
continue;
if (mlx4_is_slave_active(ibdev->dev, j))
do_slave_init(ibdev, j, 1);
}
}
return ibdev;
err_notif:
if (ibdev->iboe.nb.notifier_call) {
if (unregister_netdevice_notifier(&ibdev->iboe.nb))
pr_warn("failure unregistering notifier\n");
ibdev->iboe.nb.notifier_call = NULL;
}
flush_workqueue(wq);
mlx4_ib_close_sriov(ibdev);
err_mad:
mlx4_ib_mad_cleanup(ibdev);
err_reg:
ib_unregister_device(&ibdev->ib_dev);
err_diag_counters:
mlx4_ib_diag_cleanup(ibdev);
err_steer_free_bitmap:
bitmap_free(ibdev->ib_uc_qpns_bitmap);
err_steer_qp_release:
mlx4_qp_release_range(dev, ibdev->steer_qpn_base,
ibdev->steer_qpn_count);
err_counter:
for (i = 0; i < ibdev->num_ports; ++i)
mlx4_ib_delete_counters_table(ibdev, &ibdev->counters_table[i]);
err_map:
mlx4_ib_free_eqs(dev, ibdev);
iounmap(ibdev->uar_map);
err_uar:
mlx4_uar_free(dev, &ibdev->priv_uar);
err_pd:
mlx4_pd_free(dev, ibdev->priv_pdn);
err_dealloc:
ib_dealloc_device(&ibdev->ib_dev);
return NULL;
}
int mlx4_ib_steer_qp_alloc(struct mlx4_ib_dev *dev, int count, int *qpn)
{
int offset;
WARN_ON(!dev->ib_uc_qpns_bitmap);
offset = bitmap_find_free_region(dev->ib_uc_qpns_bitmap,
dev->steer_qpn_count,
get_count_order(count));
if (offset < 0)
return offset;
*qpn = dev->steer_qpn_base + offset;
return 0;
}
void mlx4_ib_steer_qp_free(struct mlx4_ib_dev *dev, u32 qpn, int count)
{
if (!qpn ||
dev->steering_support != MLX4_STEERING_MODE_DEVICE_MANAGED)
return;
if (WARN(qpn < dev->steer_qpn_base, "qpn = %u, steer_qpn_base = %u\n",
qpn, dev->steer_qpn_base))
/* not supposed to be here */
return;
bitmap_release_region(dev->ib_uc_qpns_bitmap,
qpn - dev->steer_qpn_base,
get_count_order(count));
}
int mlx4_ib_steer_qp_reg(struct mlx4_ib_dev *mdev, struct mlx4_ib_qp *mqp,
int is_attach)
{
int err;
size_t flow_size;
struct ib_flow_attr *flow = NULL;
struct ib_flow_spec_ib *ib_spec;
if (is_attach) {
flow_size = sizeof(struct ib_flow_attr) +
sizeof(struct ib_flow_spec_ib);
flow = kzalloc(flow_size, GFP_KERNEL);
if (!flow)
return -ENOMEM;
flow->port = mqp->port;
flow->num_of_specs = 1;
flow->size = flow_size;
ib_spec = (struct ib_flow_spec_ib *)(flow + 1);
ib_spec->type = IB_FLOW_SPEC_IB;
ib_spec->size = sizeof(struct ib_flow_spec_ib);
/* Add an empty rule for IB L2 */
memset(&ib_spec->mask, 0, sizeof(ib_spec->mask));
err = __mlx4_ib_create_flow(&mqp->ibqp, flow, MLX4_DOMAIN_NIC,
MLX4_FS_REGULAR, &mqp->reg_id);
} else {
err = __mlx4_ib_destroy_flow(mdev->dev, mqp->reg_id);
}
kfree(flow);
return err;
}
static void mlx4_ib_remove(struct mlx4_dev *dev, void *ibdev_ptr)
{
struct mlx4_ib_dev *ibdev = ibdev_ptr;
int p;
int i;
mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB)
devlink_port_type_clear(mlx4_get_devlink_port(dev, i));
ibdev->ib_active = false;
flush_workqueue(wq);
if (ibdev->iboe.nb.notifier_call) {
if (unregister_netdevice_notifier(&ibdev->iboe.nb))
pr_warn("failure unregistering notifier\n");
ibdev->iboe.nb.notifier_call = NULL;
}
mlx4_ib_close_sriov(ibdev);
mlx4_ib_mad_cleanup(ibdev);
ib_unregister_device(&ibdev->ib_dev);
mlx4_ib_diag_cleanup(ibdev);
mlx4_qp_release_range(dev, ibdev->steer_qpn_base,
ibdev->steer_qpn_count);
bitmap_free(ibdev->ib_uc_qpns_bitmap);
iounmap(ibdev->uar_map);
for (p = 0; p < ibdev->num_ports; ++p)
mlx4_ib_delete_counters_table(ibdev, &ibdev->counters_table[p]);
mlx4_foreach_port(p, dev, MLX4_PORT_TYPE_IB)
mlx4_CLOSE_PORT(dev, p);
mlx4_ib_free_eqs(dev, ibdev);
mlx4_uar_free(dev, &ibdev->priv_uar);
mlx4_pd_free(dev, ibdev->priv_pdn);
ib_dealloc_device(&ibdev->ib_dev);
}
static void do_slave_init(struct mlx4_ib_dev *ibdev, int slave, int do_init)
{
struct mlx4_ib_demux_work **dm = NULL;
struct mlx4_dev *dev = ibdev->dev;
int i;
unsigned long flags;
struct mlx4_active_ports actv_ports;
unsigned int ports;
unsigned int first_port;
if (!mlx4_is_master(dev))
return;
actv_ports = mlx4_get_active_ports(dev, slave);
ports = bitmap_weight(actv_ports.ports, dev->caps.num_ports);
first_port = find_first_bit(actv_ports.ports, dev->caps.num_ports);
dm = kcalloc(ports, sizeof(*dm), GFP_ATOMIC);
if (!dm)
return;
for (i = 0; i < ports; i++) {
dm[i] = kmalloc(sizeof (struct mlx4_ib_demux_work), GFP_ATOMIC);
if (!dm[i]) {
while (--i >= 0)
kfree(dm[i]);
goto out;
}
INIT_WORK(&dm[i]->work, mlx4_ib_tunnels_update_work);
dm[i]->port = first_port + i + 1;
dm[i]->slave = slave;
dm[i]->do_init = do_init;
dm[i]->dev = ibdev;
}
/* initialize or tear down tunnel QPs for the slave */
spin_lock_irqsave(&ibdev->sriov.going_down_lock, flags);
if (!ibdev->sriov.is_going_down) {
for (i = 0; i < ports; i++)
queue_work(ibdev->sriov.demux[i].ud_wq, &dm[i]->work);
spin_unlock_irqrestore(&ibdev->sriov.going_down_lock, flags);
} else {
spin_unlock_irqrestore(&ibdev->sriov.going_down_lock, flags);
for (i = 0; i < ports; i++)
kfree(dm[i]);
}
out:
kfree(dm);
return;
}
static void mlx4_ib_handle_catas_error(struct mlx4_ib_dev *ibdev)
{
struct mlx4_ib_qp *mqp;
unsigned long flags_qp;
unsigned long flags_cq;
struct mlx4_ib_cq *send_mcq, *recv_mcq;
struct list_head cq_notify_list;
struct mlx4_cq *mcq;
unsigned long flags;
pr_warn("mlx4_ib_handle_catas_error was started\n");
INIT_LIST_HEAD(&cq_notify_list);
/* Go over qp list reside on that ibdev, sync with create/destroy qp.*/
spin_lock_irqsave(&ibdev->reset_flow_resource_lock, flags);
list_for_each_entry(mqp, &ibdev->qp_list, qps_list) {
spin_lock_irqsave(&mqp->sq.lock, flags_qp);
if (mqp->sq.tail != mqp->sq.head) {
send_mcq = to_mcq(mqp->ibqp.send_cq);
spin_lock_irqsave(&send_mcq->lock, flags_cq);
if (send_mcq->mcq.comp &&
mqp->ibqp.send_cq->comp_handler) {
if (!send_mcq->mcq.reset_notify_added) {
send_mcq->mcq.reset_notify_added = 1;
list_add_tail(&send_mcq->mcq.reset_notify,
&cq_notify_list);
}
}
spin_unlock_irqrestore(&send_mcq->lock, flags_cq);
}
spin_unlock_irqrestore(&mqp->sq.lock, flags_qp);
/* Now, handle the QP's receive queue */
spin_lock_irqsave(&mqp->rq.lock, flags_qp);
/* no handling is needed for SRQ */
if (!mqp->ibqp.srq) {
if (mqp->rq.tail != mqp->rq.head) {
recv_mcq = to_mcq(mqp->ibqp.recv_cq);
spin_lock_irqsave(&recv_mcq->lock, flags_cq);
if (recv_mcq->mcq.comp &&
mqp->ibqp.recv_cq->comp_handler) {
if (!recv_mcq->mcq.reset_notify_added) {
recv_mcq->mcq.reset_notify_added = 1;
list_add_tail(&recv_mcq->mcq.reset_notify,
&cq_notify_list);
}
}
spin_unlock_irqrestore(&recv_mcq->lock,
flags_cq);
}
}
spin_unlock_irqrestore(&mqp->rq.lock, flags_qp);
}
list_for_each_entry(mcq, &cq_notify_list, reset_notify) {
mcq->comp(mcq);
}
spin_unlock_irqrestore(&ibdev->reset_flow_resource_lock, flags);
pr_warn("mlx4_ib_handle_catas_error ended\n");
}
static void handle_bonded_port_state_event(struct work_struct *work)
{
struct ib_event_work *ew =
container_of(work, struct ib_event_work, work);
struct mlx4_ib_dev *ibdev = ew->ib_dev;
enum ib_port_state bonded_port_state = IB_PORT_NOP;
int i;
struct ib_event ibev;
kfree(ew);
spin_lock_bh(&ibdev->iboe.lock);
for (i = 0; i < MLX4_MAX_PORTS; ++i) {
struct net_device *curr_netdev = ibdev->iboe.netdevs[i];
enum ib_port_state curr_port_state;
if (!curr_netdev)
continue;
curr_port_state =
(netif_running(curr_netdev) &&
netif_carrier_ok(curr_netdev)) ?
IB_PORT_ACTIVE : IB_PORT_DOWN;
bonded_port_state = (bonded_port_state != IB_PORT_ACTIVE) ?
curr_port_state : IB_PORT_ACTIVE;
}
spin_unlock_bh(&ibdev->iboe.lock);
ibev.device = &ibdev->ib_dev;
ibev.element.port_num = 1;
ibev.event = (bonded_port_state == IB_PORT_ACTIVE) ?
IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
ib_dispatch_event(&ibev);
}
void mlx4_ib_sl2vl_update(struct mlx4_ib_dev *mdev, int port)
{
u64 sl2vl;
int err;
err = mlx4_ib_query_sl2vl(&mdev->ib_dev, port, &sl2vl);
if (err) {
pr_err("Unable to get current sl to vl mapping for port %d. Using all zeroes (%d)\n",
port, err);
sl2vl = 0;
}
atomic64_set(&mdev->sl2vl[port - 1], sl2vl);
}
static void ib_sl2vl_update_work(struct work_struct *work)
{
struct ib_event_work *ew = container_of(work, struct ib_event_work, work);
struct mlx4_ib_dev *mdev = ew->ib_dev;
int port = ew->port;
mlx4_ib_sl2vl_update(mdev, port);
kfree(ew);
}
void mlx4_sched_ib_sl2vl_update_work(struct mlx4_ib_dev *ibdev,
int port)
{
struct ib_event_work *ew;
ew = kmalloc(sizeof(*ew), GFP_ATOMIC);
if (ew) {
INIT_WORK(&ew->work, ib_sl2vl_update_work);
ew->port = port;
ew->ib_dev = ibdev;
queue_work(wq, &ew->work);
}
}
static void mlx4_ib_event(struct mlx4_dev *dev, void *ibdev_ptr,
enum mlx4_dev_event event, unsigned long param)
{
struct ib_event ibev;
struct mlx4_ib_dev *ibdev = to_mdev((struct ib_device *) ibdev_ptr);
struct mlx4_eqe *eqe = NULL;
struct ib_event_work *ew;
int p = 0;
if (mlx4_is_bonded(dev) &&
((event == MLX4_DEV_EVENT_PORT_UP) ||
(event == MLX4_DEV_EVENT_PORT_DOWN))) {
ew = kmalloc(sizeof(*ew), GFP_ATOMIC);
if (!ew)
return;
INIT_WORK(&ew->work, handle_bonded_port_state_event);
ew->ib_dev = ibdev;
queue_work(wq, &ew->work);
return;
}
if (event == MLX4_DEV_EVENT_PORT_MGMT_CHANGE)
eqe = (struct mlx4_eqe *)param;
else
p = (int) param;
switch (event) {
case MLX4_DEV_EVENT_PORT_UP:
if (p > ibdev->num_ports)
return;
if (!mlx4_is_slave(dev) &&
rdma_port_get_link_layer(&ibdev->ib_dev, p) ==
IB_LINK_LAYER_INFINIBAND) {
if (mlx4_is_master(dev))
mlx4_ib_invalidate_all_guid_record(ibdev, p);
if (ibdev->dev->flags & MLX4_FLAG_SECURE_HOST &&
!(ibdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SL_TO_VL_CHANGE_EVENT))
mlx4_sched_ib_sl2vl_update_work(ibdev, p);
}
ibev.event = IB_EVENT_PORT_ACTIVE;
break;
case MLX4_DEV_EVENT_PORT_DOWN:
if (p > ibdev->num_ports)
return;
ibev.event = IB_EVENT_PORT_ERR;
break;
case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
ibdev->ib_active = false;
ibev.event = IB_EVENT_DEVICE_FATAL;
mlx4_ib_handle_catas_error(ibdev);
break;
case MLX4_DEV_EVENT_PORT_MGMT_CHANGE:
ew = kmalloc(sizeof *ew, GFP_ATOMIC);
if (!ew)
return;
INIT_WORK(&ew->work, handle_port_mgmt_change_event);
memcpy(&ew->ib_eqe, eqe, sizeof *eqe);
ew->ib_dev = ibdev;
/* need to queue only for port owner, which uses GEN_EQE */
if (mlx4_is_master(dev))
queue_work(wq, &ew->work);
else
handle_port_mgmt_change_event(&ew->work);
return;
case MLX4_DEV_EVENT_SLAVE_INIT:
/* here, p is the slave id */
do_slave_init(ibdev, p, 1);
if (mlx4_is_master(dev)) {
int i;
for (i = 1; i <= ibdev->num_ports; i++) {
if (rdma_port_get_link_layer(&ibdev->ib_dev, i)
== IB_LINK_LAYER_INFINIBAND)
mlx4_ib_slave_alias_guid_event(ibdev,
p, i,
1);
}
}
return;
case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
if (mlx4_is_master(dev)) {
int i;
for (i = 1; i <= ibdev->num_ports; i++) {
if (rdma_port_get_link_layer(&ibdev->ib_dev, i)
== IB_LINK_LAYER_INFINIBAND)
mlx4_ib_slave_alias_guid_event(ibdev,
p, i,
0);
}
}
/* here, p is the slave id */
do_slave_init(ibdev, p, 0);
return;
default:
return;
}
ibev.device = ibdev_ptr;
ibev.element.port_num = mlx4_is_bonded(ibdev->dev) ? 1 : (u8)p;
ib_dispatch_event(&ibev);
}
static struct mlx4_interface mlx4_ib_interface = {
.add = mlx4_ib_add,
.remove = mlx4_ib_remove,
.event = mlx4_ib_event,
.protocol = MLX4_PROT_IB_IPV6,
.flags = MLX4_INTFF_BONDING
};
static int __init mlx4_ib_init(void)
{
int err;
wq = alloc_ordered_workqueue("mlx4_ib", WQ_MEM_RECLAIM);
if (!wq)
return -ENOMEM;
err = mlx4_ib_cm_init();
if (err)
goto clean_wq;
err = mlx4_ib_mcg_init();
if (err)
goto clean_cm;
err = mlx4_register_interface(&mlx4_ib_interface);
if (err)
goto clean_mcg;
return 0;
clean_mcg:
mlx4_ib_mcg_destroy();
clean_cm:
mlx4_ib_cm_destroy();
clean_wq:
destroy_workqueue(wq);
return err;
}
static void __exit mlx4_ib_cleanup(void)
{
mlx4_unregister_interface(&mlx4_ib_interface);
mlx4_ib_mcg_destroy();
mlx4_ib_cm_destroy();
destroy_workqueue(wq);
}
module_init(mlx4_ib_init);
module_exit(mlx4_ib_cleanup);