/*
 * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
 * Copyright (c) 2005 Mellanox Technologies Ltd.  All rights reserved.
 * Copyright (c) 2005 Sun Microsystems, Inc. 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 "core_priv.h"

#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/netdevice.h>
#include <linux/ethtool.h>

#include <rdma/ib_mad.h>
#include <rdma/ib_pma.h>
#include <rdma/ib_cache.h>
#include <rdma/rdma_counter.h>
#include <rdma/ib_sysfs.h>

struct port_table_attribute {
        struct ib_port_attribute attr;
        char                    name[8];
        int                     index;
        __be16                  attr_id;
};

struct gid_attr_group {
        struct ib_port *port;
        struct kobject kobj;
        struct attribute_group groups[2];
        const struct attribute_group *groups_list[3];
        struct port_table_attribute attrs_list[];
};

struct ib_port {
        struct kobject kobj;
        struct ib_device *ibdev;
        struct gid_attr_group *gid_attr_group;
        struct hw_stats_port_data *hw_stats_data;

        struct attribute_group groups[3];
        const struct attribute_group *groups_list[5];
        u32 port_num;
        struct port_table_attribute attrs_list[];
};

struct hw_stats_device_attribute {
        struct device_attribute attr;
        ssize_t (*show)(struct ib_device *ibdev, struct rdma_hw_stats *stats,
                        unsigned int index, unsigned int port_num, char *buf);
        ssize_t (*store)(struct ib_device *ibdev, struct rdma_hw_stats *stats,
                         unsigned int index, unsigned int port_num,
                         const char *buf, size_t count);
};

struct hw_stats_port_attribute {
        struct ib_port_attribute attr;
        ssize_t (*show)(struct ib_device *ibdev, struct rdma_hw_stats *stats,
                        unsigned int index, unsigned int port_num, char *buf);
        ssize_t (*store)(struct ib_device *ibdev, struct rdma_hw_stats *stats,
                         unsigned int index, unsigned int port_num,
                         const char *buf, size_t count);
};

struct hw_stats_device_data {
        struct attribute_group group;
        struct rdma_hw_stats *stats;
        struct hw_stats_device_attribute attrs[];
};

struct hw_stats_port_data {
        struct rdma_hw_stats *stats;
        struct hw_stats_port_attribute attrs[];
};

static ssize_t port_attr_show(struct kobject *kobj,
                              struct attribute *attr, char *buf)
{
        struct ib_port_attribute *port_attr =
                container_of(attr, struct ib_port_attribute, attr);
        struct ib_port *p = container_of(kobj, struct ib_port, kobj);

        if (!port_attr->show)
                return -EIO;

        return port_attr->show(p->ibdev, p->port_num, port_attr, buf);
}

static ssize_t port_attr_store(struct kobject *kobj,
                               struct attribute *attr,
                               const char *buf, size_t count)
{
        struct ib_port_attribute *port_attr =
                container_of(attr, struct ib_port_attribute, attr);
        struct ib_port *p = container_of(kobj, struct ib_port, kobj);

        if (!port_attr->store)
                return -EIO;
        return port_attr->store(p->ibdev, p->port_num, port_attr, buf, count);
}

struct ib_device *ib_port_sysfs_get_ibdev_kobj(struct kobject *kobj,
                                               u32 *port_num)
{
        struct ib_port *port = container_of(kobj, struct ib_port, kobj);

        *port_num = port->port_num;
        return port->ibdev;
}
EXPORT_SYMBOL(ib_port_sysfs_get_ibdev_kobj);

static const struct sysfs_ops port_sysfs_ops = {
        .show   = port_attr_show,
        .store  = port_attr_store
};

static ssize_t hw_stat_device_show(struct device *dev,
                                   struct device_attribute *attr, char *buf)
{
        struct hw_stats_device_attribute *stat_attr =
                container_of(attr, struct hw_stats_device_attribute, attr);
        struct ib_device *ibdev = container_of(dev, struct ib_device, dev);

        return stat_attr->show(ibdev, ibdev->hw_stats_data->stats,
                               stat_attr - ibdev->hw_stats_data->attrs, 0, buf);
}

static ssize_t hw_stat_device_store(struct device *dev,
                                    struct device_attribute *attr,
                                    const char *buf, size_t count)
{
        struct hw_stats_device_attribute *stat_attr =
                container_of(attr, struct hw_stats_device_attribute, attr);
        struct ib_device *ibdev = container_of(dev, struct ib_device, dev);

        return stat_attr->store(ibdev, ibdev->hw_stats_data->stats,
                                stat_attr - ibdev->hw_stats_data->attrs, 0, buf,
                                count);
}

static ssize_t hw_stat_port_show(struct ib_device *ibdev, u32 port_num,
                                 struct ib_port_attribute *attr, char *buf)
{
        struct hw_stats_port_attribute *stat_attr =
                container_of(attr, struct hw_stats_port_attribute, attr);
        struct ib_port *port = ibdev->port_data[port_num].sysfs;

        return stat_attr->show(ibdev, port->hw_stats_data->stats,
                               stat_attr - port->hw_stats_data->attrs,
                               port->port_num, buf);
}

static ssize_t hw_stat_port_store(struct ib_device *ibdev, u32 port_num,
                                  struct ib_port_attribute *attr,
                                  const char *buf, size_t count)
{
        struct hw_stats_port_attribute *stat_attr =
                container_of(attr, struct hw_stats_port_attribute, attr);
        struct ib_port *port = ibdev->port_data[port_num].sysfs;

        return stat_attr->store(ibdev, port->hw_stats_data->stats,
                                stat_attr - port->hw_stats_data->attrs,
                                port->port_num, buf, count);
}

static ssize_t gid_attr_show(struct kobject *kobj,
                             struct attribute *attr, char *buf)
{
        struct ib_port_attribute *port_attr =
                container_of(attr, struct ib_port_attribute, attr);
        struct ib_port *p = container_of(kobj, struct gid_attr_group,
                                         kobj)->port;

        if (!port_attr->show)
                return -EIO;

        return port_attr->show(p->ibdev, p->port_num, port_attr, buf);
}

static const struct sysfs_ops gid_attr_sysfs_ops = {
        .show = gid_attr_show
};

static ssize_t state_show(struct ib_device *ibdev, u32 port_num,
                          struct ib_port_attribute *unused, char *buf)
{
        struct ib_port_attr attr;
        ssize_t ret;

        ret = ib_query_port(ibdev, port_num, &attr);
        if (ret)
                return ret;

        return sysfs_emit(buf, "%d: %s\n", attr.state,
                          ib_port_state_to_str(attr.state));
}

static ssize_t lid_show(struct ib_device *ibdev, u32 port_num,
                        struct ib_port_attribute *unused, char *buf)
{
        struct ib_port_attr attr;
        ssize_t ret;

        ret = ib_query_port(ibdev, port_num, &attr);
        if (ret)
                return ret;

        return sysfs_emit(buf, "0x%x\n", attr.lid);
}

static ssize_t lid_mask_count_show(struct ib_device *ibdev, u32 port_num,
                                   struct ib_port_attribute *unused, char *buf)
{
        struct ib_port_attr attr;
        ssize_t ret;

        ret = ib_query_port(ibdev, port_num, &attr);
        if (ret)
                return ret;

        return sysfs_emit(buf, "%u\n", attr.lmc);
}

static ssize_t sm_lid_show(struct ib_device *ibdev, u32 port_num,
                           struct ib_port_attribute *unused, char *buf)
{
        struct ib_port_attr attr;
        ssize_t ret;

        ret = ib_query_port(ibdev, port_num, &attr);
        if (ret)
                return ret;

        return sysfs_emit(buf, "0x%x\n", attr.sm_lid);
}

static ssize_t sm_sl_show(struct ib_device *ibdev, u32 port_num,
                          struct ib_port_attribute *unused, char *buf)
{
        struct ib_port_attr attr;
        ssize_t ret;

        ret = ib_query_port(ibdev, port_num, &attr);
        if (ret)
                return ret;

        return sysfs_emit(buf, "%u\n", attr.sm_sl);
}

static ssize_t cap_mask_show(struct ib_device *ibdev, u32 port_num,
                             struct ib_port_attribute *unused, char *buf)
{
        struct ib_port_attr attr;
        ssize_t ret;

        ret = ib_query_port(ibdev, port_num, &attr);
        if (ret)
                return ret;

        return sysfs_emit(buf, "0x%08x\n", attr.port_cap_flags);
}

static ssize_t rate_show(struct ib_device *ibdev, u32 port_num,
                         struct ib_port_attribute *unused, char *buf)
{
        struct ib_port_speed_info speed_info;
        struct ib_port_attr attr;
        ssize_t ret;

        ret = ib_query_port(ibdev, port_num, &attr);
        if (ret)
                return ret;

        ret = ib_port_attr_to_speed_info(&attr, &speed_info);
        if (ret)
                return ret;

        return sysfs_emit(buf, "%d%s Gb/sec (%dX%s)\n", speed_info.rate / 10,
                          speed_info.rate % 10 ? ".5" : "",
                          ib_width_enum_to_int(attr.active_width),
                          speed_info.str);
}

static const char *phys_state_to_str(enum ib_port_phys_state phys_state)
{
        static const char *phys_state_str[] = {
                "<unknown>",
                "Sleep",
                "Polling",
                "Disabled",
                "PortConfigurationTraining",
                "LinkUp",
                "LinkErrorRecovery",
                "Phy Test",
        };

        if (phys_state < ARRAY_SIZE(phys_state_str))
                return phys_state_str[phys_state];
        return "<unknown>";
}

static ssize_t phys_state_show(struct ib_device *ibdev, u32 port_num,
                               struct ib_port_attribute *unused, char *buf)
{
        struct ib_port_attr attr;

        ssize_t ret;

        ret = ib_query_port(ibdev, port_num, &attr);
        if (ret)
                return ret;

        return sysfs_emit(buf, "%u: %s\n", attr.phys_state,
                          phys_state_to_str(attr.phys_state));
}

static ssize_t link_layer_show(struct ib_device *ibdev, u32 port_num,
                               struct ib_port_attribute *unused, char *buf)
{
        const char *output;

        switch (rdma_port_get_link_layer(ibdev, port_num)) {
        case IB_LINK_LAYER_INFINIBAND:
                output = "InfiniBand";
                break;
        case IB_LINK_LAYER_ETHERNET:
                output = "Ethernet";
                break;
        default:
                output = "Unknown";
                break;
        }

        return sysfs_emit(buf, "%s\n", output);
}

static IB_PORT_ATTR_RO(state);
static IB_PORT_ATTR_RO(lid);
static IB_PORT_ATTR_RO(lid_mask_count);
static IB_PORT_ATTR_RO(sm_lid);
static IB_PORT_ATTR_RO(sm_sl);
static IB_PORT_ATTR_RO(cap_mask);
static IB_PORT_ATTR_RO(rate);
static IB_PORT_ATTR_RO(phys_state);
static IB_PORT_ATTR_RO(link_layer);

static struct attribute *port_default_attrs[] = {
        &ib_port_attr_state.attr,
        &ib_port_attr_lid.attr,
        &ib_port_attr_lid_mask_count.attr,
        &ib_port_attr_sm_lid.attr,
        &ib_port_attr_sm_sl.attr,
        &ib_port_attr_cap_mask.attr,
        &ib_port_attr_rate.attr,
        &ib_port_attr_phys_state.attr,
        &ib_port_attr_link_layer.attr,
        NULL
};
ATTRIBUTE_GROUPS(port_default);

static ssize_t print_ndev(const struct ib_gid_attr *gid_attr, char *buf)
{
        struct net_device *ndev;
        int ret = -EINVAL;

        rcu_read_lock();
        ndev = rcu_dereference(gid_attr->ndev);
        if (ndev)
                ret = sysfs_emit(buf, "%s\n", ndev->name);
        rcu_read_unlock();
        return ret;
}

static ssize_t print_gid_type(const struct ib_gid_attr *gid_attr, char *buf)
{
        return sysfs_emit(buf, "%s\n",
                          ib_cache_gid_type_str(gid_attr->gid_type));
}

static ssize_t _show_port_gid_attr(
        struct ib_device *ibdev, u32 port_num, struct ib_port_attribute *attr,
        char *buf,
        ssize_t (*print)(const struct ib_gid_attr *gid_attr, char *buf))
{
        struct port_table_attribute *tab_attr =
                container_of(attr, struct port_table_attribute, attr);
        const struct ib_gid_attr *gid_attr;
        ssize_t ret;

        gid_attr = rdma_get_gid_attr(ibdev, port_num, tab_attr->index);
        if (IS_ERR(gid_attr))
                /* -EINVAL is returned for user space compatibility reasons. */
                return -EINVAL;

        ret = print(gid_attr, buf);
        rdma_put_gid_attr(gid_attr);
        return ret;
}

static ssize_t show_port_gid(struct ib_device *ibdev, u32 port_num,
                             struct ib_port_attribute *attr, char *buf)
{
        struct port_table_attribute *tab_attr =
                container_of(attr, struct port_table_attribute, attr);
        const struct ib_gid_attr *gid_attr;
        int len;

        gid_attr = rdma_get_gid_attr(ibdev, port_num, tab_attr->index);
        if (IS_ERR(gid_attr)) {
                const union ib_gid zgid = {};

                /* If reading GID fails, it is likely due to GID entry being
                 * empty (invalid) or reserved GID in the table.  User space
                 * expects to read GID table entries as long as it given index
                 * is within GID table size.  Administrative/debugging tool
                 * fails to query rest of the GID entries if it hits error
                 * while querying a GID of the given index.  To avoid user
                 * space throwing such error on fail to read gid, return zero
                 * GID as before. This maintains backward compatibility.
                 */
                return sysfs_emit(buf, "%pI6\n", zgid.raw);
        }

        len = sysfs_emit(buf, "%pI6\n", gid_attr->gid.raw);
        rdma_put_gid_attr(gid_attr);
        return len;
}

static ssize_t show_port_gid_attr_ndev(struct ib_device *ibdev, u32 port_num,
                                       struct ib_port_attribute *attr,
                                       char *buf)
{
        return _show_port_gid_attr(ibdev, port_num, attr, buf, print_ndev);
}

static ssize_t show_port_gid_attr_gid_type(struct ib_device *ibdev,
                                           u32 port_num,
                                           struct ib_port_attribute *attr,
                                           char *buf)
{
        return _show_port_gid_attr(ibdev, port_num, attr, buf, print_gid_type);
}

static ssize_t show_port_pkey(struct ib_device *ibdev, u32 port_num,
                              struct ib_port_attribute *attr, char *buf)
{
        struct port_table_attribute *tab_attr =
                container_of(attr, struct port_table_attribute, attr);
        u16 pkey;
        int ret;

        ret = ib_query_pkey(ibdev, port_num, tab_attr->index, &pkey);
        if (ret)
                return ret;

        return sysfs_emit(buf, "0x%04x\n", pkey);
}

#define PORT_PMA_ATTR(_name, _counter, _width, _offset)                 \
struct port_table_attribute port_pma_attr_##_name = {                   \
        .attr  = __ATTR(_name, S_IRUGO, show_pma_counter, NULL),        \
        .index = (_offset) | ((_width) << 16) | ((_counter) << 24),     \
        .attr_id = IB_PMA_PORT_COUNTERS,                                \
}

#define PORT_PMA_ATTR_EXT(_name, _width, _offset)                       \
struct port_table_attribute port_pma_attr_ext_##_name = {               \
        .attr  = __ATTR(_name, S_IRUGO, show_pma_counter, NULL),        \
        .index = (_offset) | ((_width) << 16),                          \
        .attr_id = IB_PMA_PORT_COUNTERS_EXT,                            \
}

/*
 * Get a Perfmgmt MAD block of data.
 * Returns error code or the number of bytes retrieved.
 */
static int get_perf_mad(struct ib_device *dev, int port_num, __be16 attr,
                void *data, int offset, size_t size)
{
        struct ib_mad *in_mad;
        struct ib_mad *out_mad;
        size_t mad_size = sizeof(*out_mad);
        u16 out_mad_pkey_index = 0;
        ssize_t ret;

        if (!dev->ops.process_mad)
                return -ENOSYS;

        in_mad = kzalloc_obj(*in_mad);
        out_mad = kzalloc_obj(*out_mad);
        if (!in_mad || !out_mad) {
                ret = -ENOMEM;
                goto out;
        }

        in_mad->mad_hdr.base_version  = 1;
        in_mad->mad_hdr.mgmt_class    = IB_MGMT_CLASS_PERF_MGMT;
        in_mad->mad_hdr.class_version = 1;
        in_mad->mad_hdr.method        = IB_MGMT_METHOD_GET;
        in_mad->mad_hdr.attr_id       = attr;

        if (attr != IB_PMA_CLASS_PORT_INFO)
                in_mad->data[41] = port_num;    /* PortSelect field */

        if ((dev->ops.process_mad(dev, IB_MAD_IGNORE_MKEY, port_num, NULL, NULL,
                                  in_mad, out_mad, &mad_size,
                                  &out_mad_pkey_index) &
             (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) !=
            (IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY)) {
                ret = -EINVAL;
                goto out;
        }
        memcpy(data, out_mad->data + offset, size);
        ret = size;
out:
        kfree(in_mad);
        kfree(out_mad);
        return ret;
}

static ssize_t show_pma_counter(struct ib_device *ibdev, u32 port_num,
                                struct ib_port_attribute *attr, char *buf)
{
        struct port_table_attribute *tab_attr =
                container_of(attr, struct port_table_attribute, attr);
        int offset = tab_attr->index & 0xffff;
        int width  = (tab_attr->index >> 16) & 0xff;
        int ret;
        u8 data[8];
        int len;

        ret = get_perf_mad(ibdev, port_num, tab_attr->attr_id, &data,
                        40 + offset / 8, sizeof(data));
        if (ret < 0)
                return ret;

        switch (width) {
        case 4:
                len = sysfs_emit(buf, "%d\n",
                                 (*data >> (4 - (offset % 8))) & 0xf);
                break;
        case 8:
                len = sysfs_emit(buf, "%u\n", *data);
                break;
        case 16:
                len = sysfs_emit(buf, "%u\n", be16_to_cpup((__be16 *)data));
                break;
        case 32:
                len = sysfs_emit(buf, "%u\n", be32_to_cpup((__be32 *)data));
                break;
        case 64:
                len = sysfs_emit(buf, "%llu\n", be64_to_cpup((__be64 *)data));
                break;
        default:
                len = 0;
                break;
        }

        return len;
}

static PORT_PMA_ATTR(symbol_error                   ,  0, 16,  32);
static PORT_PMA_ATTR(link_error_recovery            ,  1,  8,  48);
static PORT_PMA_ATTR(link_downed                    ,  2,  8,  56);
static PORT_PMA_ATTR(port_rcv_errors                ,  3, 16,  64);
static PORT_PMA_ATTR(port_rcv_remote_physical_errors,  4, 16,  80);
static PORT_PMA_ATTR(port_rcv_switch_relay_errors   ,  5, 16,  96);
static PORT_PMA_ATTR(port_xmit_discards             ,  6, 16, 112);
static PORT_PMA_ATTR(port_xmit_constraint_errors    ,  7,  8, 128);
static PORT_PMA_ATTR(port_rcv_constraint_errors     ,  8,  8, 136);
static PORT_PMA_ATTR(local_link_integrity_errors    ,  9,  4, 152);
static PORT_PMA_ATTR(excessive_buffer_overrun_errors, 10,  4, 156);
static PORT_PMA_ATTR(VL15_dropped                   , 11, 16, 176);
static PORT_PMA_ATTR(port_xmit_data                 , 12, 32, 192);
static PORT_PMA_ATTR(port_rcv_data                  , 13, 32, 224);
static PORT_PMA_ATTR(port_xmit_packets              , 14, 32, 256);
static PORT_PMA_ATTR(port_rcv_packets               , 15, 32, 288);
static PORT_PMA_ATTR(port_xmit_wait                 ,  0, 32, 320);

/*
 * Counters added by extended set
 */
static PORT_PMA_ATTR_EXT(port_xmit_data             , 64,  64);
static PORT_PMA_ATTR_EXT(port_rcv_data              , 64, 128);
static PORT_PMA_ATTR_EXT(port_xmit_packets          , 64, 192);
static PORT_PMA_ATTR_EXT(port_rcv_packets           , 64, 256);
static PORT_PMA_ATTR_EXT(unicast_xmit_packets       , 64, 320);
static PORT_PMA_ATTR_EXT(unicast_rcv_packets        , 64, 384);
static PORT_PMA_ATTR_EXT(multicast_xmit_packets     , 64, 448);
static PORT_PMA_ATTR_EXT(multicast_rcv_packets      , 64, 512);

static struct attribute *pma_attrs[] = {
        &port_pma_attr_symbol_error.attr.attr,
        &port_pma_attr_link_error_recovery.attr.attr,
        &port_pma_attr_link_downed.attr.attr,
        &port_pma_attr_port_rcv_errors.attr.attr,
        &port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
        &port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
        &port_pma_attr_port_xmit_discards.attr.attr,
        &port_pma_attr_port_xmit_constraint_errors.attr.attr,
        &port_pma_attr_port_rcv_constraint_errors.attr.attr,
        &port_pma_attr_local_link_integrity_errors.attr.attr,
        &port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
        &port_pma_attr_VL15_dropped.attr.attr,
        &port_pma_attr_port_xmit_data.attr.attr,
        &port_pma_attr_port_rcv_data.attr.attr,
        &port_pma_attr_port_xmit_packets.attr.attr,
        &port_pma_attr_port_rcv_packets.attr.attr,
        &port_pma_attr_port_xmit_wait.attr.attr,
        NULL
};

static struct attribute *pma_attrs_ext[] = {
        &port_pma_attr_symbol_error.attr.attr,
        &port_pma_attr_link_error_recovery.attr.attr,
        &port_pma_attr_link_downed.attr.attr,
        &port_pma_attr_port_rcv_errors.attr.attr,
        &port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
        &port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
        &port_pma_attr_port_xmit_discards.attr.attr,
        &port_pma_attr_port_xmit_constraint_errors.attr.attr,
        &port_pma_attr_port_rcv_constraint_errors.attr.attr,
        &port_pma_attr_local_link_integrity_errors.attr.attr,
        &port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
        &port_pma_attr_VL15_dropped.attr.attr,
        &port_pma_attr_ext_port_xmit_data.attr.attr,
        &port_pma_attr_ext_port_rcv_data.attr.attr,
        &port_pma_attr_ext_port_xmit_packets.attr.attr,
        &port_pma_attr_port_xmit_wait.attr.attr,
        &port_pma_attr_ext_port_rcv_packets.attr.attr,
        &port_pma_attr_ext_unicast_rcv_packets.attr.attr,
        &port_pma_attr_ext_unicast_xmit_packets.attr.attr,
        &port_pma_attr_ext_multicast_rcv_packets.attr.attr,
        &port_pma_attr_ext_multicast_xmit_packets.attr.attr,
        NULL
};

static struct attribute *pma_attrs_noietf[] = {
        &port_pma_attr_symbol_error.attr.attr,
        &port_pma_attr_link_error_recovery.attr.attr,
        &port_pma_attr_link_downed.attr.attr,
        &port_pma_attr_port_rcv_errors.attr.attr,
        &port_pma_attr_port_rcv_remote_physical_errors.attr.attr,
        &port_pma_attr_port_rcv_switch_relay_errors.attr.attr,
        &port_pma_attr_port_xmit_discards.attr.attr,
        &port_pma_attr_port_xmit_constraint_errors.attr.attr,
        &port_pma_attr_port_rcv_constraint_errors.attr.attr,
        &port_pma_attr_local_link_integrity_errors.attr.attr,
        &port_pma_attr_excessive_buffer_overrun_errors.attr.attr,
        &port_pma_attr_VL15_dropped.attr.attr,
        &port_pma_attr_ext_port_xmit_data.attr.attr,
        &port_pma_attr_ext_port_rcv_data.attr.attr,
        &port_pma_attr_ext_port_xmit_packets.attr.attr,
        &port_pma_attr_ext_port_rcv_packets.attr.attr,
        &port_pma_attr_port_xmit_wait.attr.attr,
        NULL
};

static const struct attribute_group pma_group = {
        .name  = "counters",
        .attrs  = pma_attrs
};

static const struct attribute_group pma_group_ext = {
        .name  = "counters",
        .attrs  = pma_attrs_ext
};

static const struct attribute_group pma_group_noietf = {
        .name  = "counters",
        .attrs  = pma_attrs_noietf
};

static void ib_port_release(struct kobject *kobj)
{
        struct ib_port *port = container_of(kobj, struct ib_port, kobj);
        int i;

        for (i = 0; i != ARRAY_SIZE(port->groups); i++)
                kfree(port->groups[i].attrs);
        if (port->hw_stats_data)
                rdma_free_hw_stats_struct(port->hw_stats_data->stats);
        kfree(port->hw_stats_data);
        kvfree(port);
}

static void ib_port_gid_attr_release(struct kobject *kobj)
{
        struct gid_attr_group *gid_attr_group =
                container_of(kobj, struct gid_attr_group, kobj);
        int i;

        for (i = 0; i != ARRAY_SIZE(gid_attr_group->groups); i++)
                kfree(gid_attr_group->groups[i].attrs);
        kfree(gid_attr_group);
}

static struct kobj_type port_type = {
        .release       = ib_port_release,
        .sysfs_ops     = &port_sysfs_ops,
        .default_groups = port_default_groups,
};

static struct kobj_type gid_attr_type = {
        .sysfs_ops      = &gid_attr_sysfs_ops,
        .release        = ib_port_gid_attr_release
};

/*
 * Figure out which counter table to use depending on
 * the device capabilities.
 */
static const struct attribute_group *get_counter_table(struct ib_device *dev,
                                                       int port_num)
{
        struct ib_class_port_info cpi;

        if (get_perf_mad(dev, port_num, IB_PMA_CLASS_PORT_INFO,
                                &cpi, 40, sizeof(cpi)) >= 0) {
                if (cpi.capability_mask & IB_PMA_CLASS_CAP_EXT_WIDTH)
                        /* We have extended counters */
                        return &pma_group_ext;

                if (cpi.capability_mask & IB_PMA_CLASS_CAP_EXT_WIDTH_NOIETF)
                        /* But not the IETF ones */
                        return &pma_group_noietf;
        }

        /* Fall back to normal counters */
        return &pma_group;
}

static int update_hw_stats(struct ib_device *dev, struct rdma_hw_stats *stats,
                           u32 port_num, int index)
{
        int ret;

        if (time_is_after_eq_jiffies(stats->timestamp + stats->lifespan))
                return 0;
        ret = dev->ops.get_hw_stats(dev, stats, port_num, index);
        if (ret < 0)
                return ret;
        if (ret == stats->num_counters)
                stats->timestamp = jiffies;

        return 0;
}

static int print_hw_stat(struct ib_device *dev, int port_num,
                         struct rdma_hw_stats *stats, int index, char *buf)
{
        u64 v = rdma_counter_get_hwstat_value(dev, port_num, index);

        return sysfs_emit(buf, "%llu\n", stats->value[index] + v);
}

static ssize_t show_hw_stats(struct ib_device *ibdev,
                             struct rdma_hw_stats *stats, unsigned int index,
                             unsigned int port_num, char *buf)
{
        int ret;

        mutex_lock(&stats->lock);
        ret = update_hw_stats(ibdev, stats, port_num, index);
        if (ret)
                goto unlock;
        ret = print_hw_stat(ibdev, port_num, stats, index, buf);
unlock:
        mutex_unlock(&stats->lock);

        return ret;
}

static ssize_t show_stats_lifespan(struct ib_device *ibdev,
                                   struct rdma_hw_stats *stats,
                                   unsigned int index, unsigned int port_num,
                                   char *buf)
{
        int msecs;

        mutex_lock(&stats->lock);
        msecs = jiffies_to_msecs(stats->lifespan);
        mutex_unlock(&stats->lock);

        return sysfs_emit(buf, "%d\n", msecs);
}

static ssize_t set_stats_lifespan(struct ib_device *ibdev,
                                   struct rdma_hw_stats *stats,
                                   unsigned int index, unsigned int port_num,
                                   const char *buf, size_t count)
{
        int msecs;
        int jiffies;
        int ret;

        ret = kstrtoint(buf, 10, &msecs);
        if (ret)
                return ret;
        if (msecs < 0 || msecs > 10000)
                return -EINVAL;
        jiffies = msecs_to_jiffies(msecs);

        mutex_lock(&stats->lock);
        stats->lifespan = jiffies;
        mutex_unlock(&stats->lock);

        return count;
}

static struct hw_stats_device_data *
alloc_hw_stats_device(struct ib_device *ibdev)
{
        struct hw_stats_device_data *data;
        struct rdma_hw_stats *stats;

        if (!ibdev->ops.alloc_hw_device_stats)
                return ERR_PTR(-EOPNOTSUPP);
        stats = ibdev->ops.alloc_hw_device_stats(ibdev);
        if (!stats)
                return ERR_PTR(-ENOMEM);
        if (!stats->descs || stats->num_counters <= 0)
                goto err_free_stats;

        /*
         * Two extra attribue elements here, one for the lifespan entry and
         * one to NULL terminate the list for the sysfs core code
         */
        data = kzalloc_flex(*data, attrs, size_add(stats->num_counters, 1));
        if (!data)
                goto err_free_stats;
        data->group.attrs = kzalloc_objs(*data->group.attrs,
                                         stats->num_counters + 2);
        if (!data->group.attrs)
                goto err_free_data;

        data->group.name = "hw_counters";
        data->stats = stats;
        return data;

err_free_data:
        kfree(data);
err_free_stats:
        rdma_free_hw_stats_struct(stats);
        return ERR_PTR(-ENOMEM);
}

void ib_device_release_hw_stats(struct hw_stats_device_data *data)
{
        kfree(data->group.attrs);
        rdma_free_hw_stats_struct(data->stats);
        kfree(data);
}

int ib_setup_device_attrs(struct ib_device *ibdev)
{
        struct hw_stats_device_attribute *attr;
        struct hw_stats_device_data *data;
        bool opstat_skipped = false;
        int i, ret, pos = 0;

        data = alloc_hw_stats_device(ibdev);
        if (IS_ERR(data)) {
                if (PTR_ERR(data) == -EOPNOTSUPP)
                        return 0;
                return PTR_ERR(data);
        }
        ibdev->hw_stats_data = data;

        ret = ibdev->ops.get_hw_stats(ibdev, data->stats, 0,
                                      data->stats->num_counters);
        if (ret != data->stats->num_counters) {
                if (WARN_ON(ret >= 0))
                        return -EINVAL;
                return ret;
        }

        data->stats->timestamp = jiffies;

        for (i = 0; i < data->stats->num_counters; i++) {
                if (data->stats->descs[i].flags & IB_STAT_FLAG_OPTIONAL) {
                        opstat_skipped = true;
                        continue;
                }

                WARN_ON(opstat_skipped);
                attr = &data->attrs[pos];
                sysfs_attr_init(&attr->attr.attr);
                attr->attr.attr.name = data->stats->descs[i].name;
                attr->attr.attr.mode = 0444;
                attr->attr.show = hw_stat_device_show;
                attr->show = show_hw_stats;
                data->group.attrs[pos] = &attr->attr.attr;
                pos++;
        }

        attr = &data->attrs[pos];
        sysfs_attr_init(&attr->attr.attr);
        attr->attr.attr.name = "lifespan";
        attr->attr.attr.mode = 0644;
        attr->attr.show = hw_stat_device_show;
        attr->show = show_stats_lifespan;
        attr->attr.store = hw_stat_device_store;
        attr->store = set_stats_lifespan;
        data->group.attrs[pos] = &attr->attr.attr;
        for (i = 0; i != ARRAY_SIZE(ibdev->groups); i++)
                if (!ibdev->groups[i]) {
                        ibdev->groups[i] = &data->group;
                        ibdev->hw_stats_attr_index = i;
                        return 0;
                }
        WARN(true, "struct ib_device->groups is too small");
        return -EINVAL;
}

static struct hw_stats_port_data *
alloc_hw_stats_port(struct ib_port *port, struct attribute_group *group)
{
        struct ib_device *ibdev = port->ibdev;
        struct hw_stats_port_data *data;
        struct rdma_hw_stats *stats;

        if (!ibdev->ops.alloc_hw_port_stats)
                return ERR_PTR(-EOPNOTSUPP);
        stats = ibdev->ops.alloc_hw_port_stats(port->ibdev, port->port_num);
        if (!stats)
                return ERR_PTR(-ENOMEM);
        if (!stats->descs || stats->num_counters <= 0)
                goto err_free_stats;

        /*
         * Two extra attribue elements here, one for the lifespan entry and
         * one to NULL terminate the list for the sysfs core code
         */
        data = kzalloc_flex(*data, attrs, size_add(stats->num_counters, 1));
        if (!data)
                goto err_free_stats;
        group->attrs = kzalloc_objs(*group->attrs, stats->num_counters + 2);
        if (!group->attrs)
                goto err_free_data;

        group->name = "hw_counters";
        data->stats = stats;
        return data;

err_free_data:
        kfree(data);
err_free_stats:
        rdma_free_hw_stats_struct(stats);
        return ERR_PTR(-ENOMEM);
}

static int setup_hw_port_stats(struct ib_port *port,
                               struct attribute_group *group)
{
        struct hw_stats_port_attribute *attr;
        struct hw_stats_port_data *data;
        bool opstat_skipped = false;
        int i, ret, pos = 0;

        data = alloc_hw_stats_port(port, group);
        if (IS_ERR(data))
                return PTR_ERR(data);

        ret = port->ibdev->ops.get_hw_stats(port->ibdev, data->stats,
                                            port->port_num,
                                            data->stats->num_counters);
        if (ret != data->stats->num_counters) {
                if (WARN_ON(ret >= 0))
                        return -EINVAL;
                return ret;
        }

        data->stats->timestamp = jiffies;

        for (i = 0; i < data->stats->num_counters; i++) {
                if (data->stats->descs[i].flags & IB_STAT_FLAG_OPTIONAL) {
                        opstat_skipped = true;
                        continue;
                }

                WARN_ON(opstat_skipped);
                attr = &data->attrs[pos];
                sysfs_attr_init(&attr->attr.attr);
                attr->attr.attr.name = data->stats->descs[i].name;
                attr->attr.attr.mode = 0444;
                attr->attr.show = hw_stat_port_show;
                attr->show = show_hw_stats;
                group->attrs[pos] = &attr->attr.attr;
                pos++;
        }

        attr = &data->attrs[pos];
        sysfs_attr_init(&attr->attr.attr);
        attr->attr.attr.name = "lifespan";
        attr->attr.attr.mode = 0644;
        attr->attr.show = hw_stat_port_show;
        attr->show = show_stats_lifespan;
        attr->attr.store = hw_stat_port_store;
        attr->store = set_stats_lifespan;
        group->attrs[pos] = &attr->attr.attr;

        port->hw_stats_data = data;
        return 0;
}

struct rdma_hw_stats *ib_get_hw_stats_port(struct ib_device *ibdev,
                                           u32 port_num)
{
        if (!ibdev->port_data || !rdma_is_port_valid(ibdev, port_num) ||
            !ibdev->port_data[port_num].sysfs->hw_stats_data)
                return NULL;
        return ibdev->port_data[port_num].sysfs->hw_stats_data->stats;
}

static int
alloc_port_table_group(const char *name, struct attribute_group *group,
                       struct port_table_attribute *attrs, size_t num,
                       ssize_t (*show)(struct ib_device *ibdev, u32 port_num,
                                       struct ib_port_attribute *, char *buf))
{
        struct attribute **attr_list;
        int i;

        attr_list = kzalloc_objs(*attr_list, num + 1);
        if (!attr_list)
                return -ENOMEM;

        for (i = 0; i < num; i++) {
                struct port_table_attribute *element = &attrs[i];

                if (snprintf(element->name, sizeof(element->name), "%d", i) >=
                    sizeof(element->name))
                        goto err;

                sysfs_attr_init(&element->attr.attr);
                element->attr.attr.name = element->name;
                element->attr.attr.mode = 0444;
                element->attr.show = show;
                element->index = i;

                attr_list[i] = &element->attr.attr;
        }
        group->name = name;
        group->attrs = attr_list;
        return 0;
err:
        kfree(attr_list);
        return -EINVAL;
}

/*
 * Create the sysfs:
 *  ibp0s9/ports/XX/gid_attrs/{ndevs,types}/YYY
 * YYY is the gid table index in decimal
 */
static int setup_gid_attrs(struct ib_port *port,
                           const struct ib_port_attr *attr)
{
        struct gid_attr_group *gid_attr_group;
        int ret;

        gid_attr_group = kzalloc_flex(*gid_attr_group, attrs_list,
                                      size_mul(attr->gid_tbl_len, 2));
        if (!gid_attr_group)
                return -ENOMEM;
        gid_attr_group->port = port;
        kobject_init(&gid_attr_group->kobj, &gid_attr_type);

        ret = alloc_port_table_group("ndevs", &gid_attr_group->groups[0],
                                     gid_attr_group->attrs_list,
                                     attr->gid_tbl_len,
                                     show_port_gid_attr_ndev);
        if (ret)
                goto err_put;
        gid_attr_group->groups_list[0] = &gid_attr_group->groups[0];

        ret = alloc_port_table_group(
                "types", &gid_attr_group->groups[1],
                gid_attr_group->attrs_list + attr->gid_tbl_len,
                attr->gid_tbl_len, show_port_gid_attr_gid_type);
        if (ret)
                goto err_put;
        gid_attr_group->groups_list[1] = &gid_attr_group->groups[1];

        ret = kobject_add(&gid_attr_group->kobj, &port->kobj, "gid_attrs");
        if (ret)
                goto err_put;
        ret = sysfs_create_groups(&gid_attr_group->kobj,
                                  gid_attr_group->groups_list);
        if (ret)
                goto err_del;
        port->gid_attr_group = gid_attr_group;
        return 0;

err_del:
        kobject_del(&gid_attr_group->kobj);
err_put:
        kobject_put(&gid_attr_group->kobj);
        return ret;
}

static void destroy_gid_attrs(struct ib_port *port)
{
        struct gid_attr_group *gid_attr_group = port->gid_attr_group;

        if (!gid_attr_group)
                return;
        sysfs_remove_groups(&gid_attr_group->kobj, gid_attr_group->groups_list);
        kobject_del(&gid_attr_group->kobj);
        kobject_put(&gid_attr_group->kobj);
}

/*
 * Create the sysfs:
 *  ibp0s9/ports/XX/{gids,pkeys,counters}/YYY
 */
static struct ib_port *setup_port(struct ib_core_device *coredev, int port_num,
                                  const struct ib_port_attr *attr)
{
        struct ib_device *device = rdma_device_to_ibdev(&coredev->dev);
        bool is_full_dev = &device->coredev == coredev;
        const struct attribute_group **cur_group;
        struct ib_port *p;
        int ret;

        p = kvzalloc_flex(*p, attrs_list,
                          size_add(attr->gid_tbl_len, attr->pkey_tbl_len));
        if (!p)
                return ERR_PTR(-ENOMEM);
        p->ibdev = device;
        p->port_num = port_num;
        kobject_init(&p->kobj, &port_type);

        if (device->port_data && is_full_dev)
                device->port_data[port_num].sysfs = p;

        cur_group = p->groups_list;
        ret = alloc_port_table_group("gids", &p->groups[0], p->attrs_list,
                                     attr->gid_tbl_len, show_port_gid);
        if (ret)
                goto err_put;
        *cur_group++ = &p->groups[0];

        if (attr->pkey_tbl_len) {
                ret = alloc_port_table_group("pkeys", &p->groups[1],
                                             p->attrs_list + attr->gid_tbl_len,
                                             attr->pkey_tbl_len, show_port_pkey);
                if (ret)
                        goto err_put;
                *cur_group++ = &p->groups[1];
        }

        /*
         * If port == 0, it means hw_counters are per device and not per
         * port, so holder should be device. Therefore skip per port
         * counter initialization.
         */
        if (port_num && is_full_dev) {
                ret = setup_hw_port_stats(p, &p->groups[2]);
                if (ret && ret != -EOPNOTSUPP)
                        goto err_put;
                if (!ret)
                        *cur_group++ = &p->groups[2];
        }

        if (device->ops.process_mad && is_full_dev)
                *cur_group++ = get_counter_table(device, port_num);

        ret = kobject_add(&p->kobj, coredev->ports_kobj, "%d", port_num);
        if (ret)
                goto err_put;
        ret = sysfs_create_groups(&p->kobj, p->groups_list);
        if (ret)
                goto err_del;
        if (is_full_dev) {
                ret = sysfs_create_groups(&p->kobj, device->ops.port_groups);
                if (ret)
                        goto err_groups;
        }

        list_add_tail(&p->kobj.entry, &coredev->port_list);
        return p;

err_groups:
        sysfs_remove_groups(&p->kobj, p->groups_list);
err_del:
        kobject_del(&p->kobj);
err_put:
        if (device->port_data && is_full_dev)
                device->port_data[port_num].sysfs = NULL;
        kobject_put(&p->kobj);
        return ERR_PTR(ret);
}

static void destroy_port(struct ib_core_device *coredev, struct ib_port *port)
{
        bool is_full_dev = &port->ibdev->coredev == coredev;

        list_del(&port->kobj.entry);
        if (is_full_dev)
                sysfs_remove_groups(&port->kobj, port->ibdev->ops.port_groups);

        sysfs_remove_groups(&port->kobj, port->groups_list);
        kobject_del(&port->kobj);

        if (port->ibdev->port_data &&
            port->ibdev->port_data[port->port_num].sysfs == port)
                port->ibdev->port_data[port->port_num].sysfs = NULL;

        kobject_put(&port->kobj);
}

static const char *node_type_string(int node_type)
{
        switch (node_type) {
        case RDMA_NODE_IB_CA:
                return "CA";
        case RDMA_NODE_IB_SWITCH:
                return "switch";
        case RDMA_NODE_IB_ROUTER:
                return "router";
        case RDMA_NODE_RNIC:
                return "RNIC";
        case RDMA_NODE_USNIC:
                return "usNIC";
        case RDMA_NODE_USNIC_UDP:
                return "usNIC UDP";
        case RDMA_NODE_UNSPECIFIED:
                return "unspecified";
        }
        return "<unknown>";
}

static ssize_t node_type_show(struct device *device,
                              struct device_attribute *attr, char *buf)
{
        struct ib_device *dev = rdma_device_to_ibdev(device);

        return sysfs_emit(buf, "%u: %s\n", dev->node_type,
                          node_type_string(dev->node_type));
}
static DEVICE_ATTR_RO(node_type);

static ssize_t sys_image_guid_show(struct device *device,
                                   struct device_attribute *dev_attr, char *buf)
{
        struct ib_device *dev = rdma_device_to_ibdev(device);
        __be16 *guid = (__be16 *)&dev->attrs.sys_image_guid;

        return sysfs_emit(buf, "%04x:%04x:%04x:%04x\n",
                          be16_to_cpu(guid[0]),
                          be16_to_cpu(guid[1]),
                          be16_to_cpu(guid[2]),
                          be16_to_cpu(guid[3]));
}
static DEVICE_ATTR_RO(sys_image_guid);

static ssize_t node_guid_show(struct device *device,
                              struct device_attribute *attr, char *buf)
{
        struct ib_device *dev = rdma_device_to_ibdev(device);
        __be16 *node_guid = (__be16 *)&dev->node_guid;

        return sysfs_emit(buf, "%04x:%04x:%04x:%04x\n",
                          be16_to_cpu(node_guid[0]),
                          be16_to_cpu(node_guid[1]),
                          be16_to_cpu(node_guid[2]),
                          be16_to_cpu(node_guid[3]));
}
static DEVICE_ATTR_RO(node_guid);

static ssize_t node_desc_show(struct device *device,
                              struct device_attribute *attr, char *buf)
{
        struct ib_device *dev = rdma_device_to_ibdev(device);

        return sysfs_emit(buf, "%.64s\n", dev->node_desc);
}

static ssize_t node_desc_store(struct device *device,
                               struct device_attribute *attr,
                               const char *buf, size_t count)
{
        struct ib_device *dev = rdma_device_to_ibdev(device);
        struct ib_device_modify desc = {};
        int ret;

        if (!dev->ops.modify_device)
                return -EOPNOTSUPP;

        memcpy(desc.node_desc, buf, min_t(int, count, IB_DEVICE_NODE_DESC_MAX));
        ret = ib_modify_device(dev, IB_DEVICE_MODIFY_NODE_DESC, &desc);
        if (ret)
                return ret;

        return count;
}
static DEVICE_ATTR_RW(node_desc);

static ssize_t fw_ver_show(struct device *device, struct device_attribute *attr,
                           char *buf)
{
        struct ib_device *dev = rdma_device_to_ibdev(device);
        char version[IB_FW_VERSION_NAME_MAX] = {};

        ib_get_device_fw_str(dev, version);

        return sysfs_emit(buf, "%s\n", version);
}
static DEVICE_ATTR_RO(fw_ver);

static struct attribute *ib_dev_attrs[] = {
        &dev_attr_node_type.attr,
        &dev_attr_node_guid.attr,
        &dev_attr_sys_image_guid.attr,
        &dev_attr_fw_ver.attr,
        &dev_attr_node_desc.attr,
        NULL,
};

const struct attribute_group ib_dev_attr_group = {
        .attrs = ib_dev_attrs,
};

void ib_free_port_attrs(struct ib_core_device *coredev)
{
        struct kobject *p, *t;

        list_for_each_entry_safe(p, t, &coredev->port_list, entry) {
                struct ib_port *port = container_of(p, struct ib_port, kobj);

                destroy_gid_attrs(port);
                destroy_port(coredev, port);
        }

        kobject_put(coredev->ports_kobj);
}

int ib_setup_port_attrs(struct ib_core_device *coredev)
{
        struct ib_device *device = rdma_device_to_ibdev(&coredev->dev);
        u32 port_num;
        int ret;

        coredev->ports_kobj = kobject_create_and_add("ports",
                                                     &coredev->dev.kobj);
        if (!coredev->ports_kobj)
                return -ENOMEM;

        rdma_for_each_port (device, port_num) {
                struct ib_port_attr attr;
                struct ib_port *port;

                ret = ib_query_port(device, port_num, &attr);
                if (ret)
                        goto err_put;

                port = setup_port(coredev, port_num, &attr);
                if (IS_ERR(port)) {
                        ret = PTR_ERR(port);
                        goto err_put;
                }

                ret = setup_gid_attrs(port, &attr);
                if (ret)
                        goto err_put;
        }
        return 0;

err_put:
        ib_free_port_attrs(coredev);
        return ret;
}

/**
 * ib_port_register_client_groups - Add an ib_client's attributes to the port
 *
 * @ibdev: IB device to add counters
 * @port_num: valid port number
 * @groups: Group list of attributes
 *
 * Do not use. Only for legacy sysfs compatibility.
 */
int ib_port_register_client_groups(struct ib_device *ibdev, u32 port_num,
                                   const struct attribute_group **groups)
{
        return sysfs_create_groups(&ibdev->port_data[port_num].sysfs->kobj,
                                   groups);
}
EXPORT_SYMBOL(ib_port_register_client_groups);

void ib_port_unregister_client_groups(struct ib_device *ibdev, u32 port_num,
                                      const struct attribute_group **groups)
{
        return sysfs_remove_groups(&ibdev->port_data[port_num].sysfs->kobj,
                                   groups);
}
EXPORT_SYMBOL(ib_port_unregister_client_groups);