qib_sysfs.c

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/*
 * Copyright (c) 2012 Intel Corporation.  All rights reserved.
 * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved.
 * Copyright (c) 2006 PathScale, 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 <linux/ctype.h>

#include "qib.h"
#include "qib_mad.h"

/* start of per-port functions */
/*
 * Get/Set heartbeat enable. OR of 1=enabled, 2=auto
 */
static ssize_t show_hrtbt_enb(struct qib_pportdata *ppd, char *buf)
{
    struct qib_devdata *dd = ppd->dd;
    int ret;

    ret = dd->f_get_ib_cfg(ppd, QIB_IB_CFG_HRTBT);
    ret = scnprintf(buf, PAGE_SIZE, "%d\n", ret);
    return ret;
}

static ssize_t store_hrtbt_enb(struct qib_pportdata *ppd, const char *buf,
                   size_t count)
{
    struct qib_devdata *dd = ppd->dd;
    int ret;
    u16 val;

    ret = kstrtou16(buf, 0, &val);
    if (ret) {
        qib_dev_err(dd, "attempt to set invalid Heartbeat enable\n");
        return ret;
    }

    /*
     * Set the "intentional" heartbeat enable per either of
     * "Enable" and "Auto", as these are normally set together.
     * This bit is consulted when leaving loopback mode,
     * because entering loopback mode overrides it and automatically
     * disables heartbeat.
     */
    ret = dd->f_set_ib_cfg(ppd, QIB_IB_CFG_HRTBT, val);
    return ret < 0 ? ret : count;
}

static ssize_t store_loopback(struct qib_pportdata *ppd, const char *buf,
                  size_t count)
{
    struct qib_devdata *dd = ppd->dd;
    int ret = count, r;

    r = dd->f_set_ib_loopback(ppd, buf);
    if (r < 0)
        ret = r;

    return ret;
}

static ssize_t store_led_override(struct qib_pportdata *ppd, const char *buf,
                  size_t count)
{
    struct qib_devdata *dd = ppd->dd;
    int ret;
    u16 val;

    ret = kstrtou16(buf, 0, &val);
    if (ret) {
        qib_dev_err(dd, "attempt to set invalid LED override\n");
        return ret;
    }

    qib_set_led_override(ppd, val);
    return count;
}

static ssize_t show_status(struct qib_pportdata *ppd, char *buf)
{
    ssize_t ret;

    if (!ppd->statusp)
        ret = -EINVAL;
    else
        ret = scnprintf(buf, PAGE_SIZE, "0x%llx\n",
                (unsigned long long) *(ppd->statusp));
    return ret;
}

/*
 * For userland compatibility, these offsets must remain fixed.
 * They are strings for QIB_STATUS_*
 */
static const char * const qib_status_str[] = {
    "Initted",
    "",
    "",
    "",
    "",
    "Present",
    "IB_link_up",
    "IB_configured",
    "",
    "Fatal_Hardware_Error",
    NULL,
};

static ssize_t show_status_str(struct qib_pportdata *ppd, char *buf)
{
    int i, any;
    u64 s;
    ssize_t ret;

    if (!ppd->statusp) {
        ret = -EINVAL;
        goto bail;
    }

    s = *(ppd->statusp);
    *buf = '\0';
    for (any = i = 0; s && qib_status_str[i]; i++) {
        if (s & 1) {
            /* if overflow */
            if (any && strlcat(buf, " ", PAGE_SIZE) >= PAGE_SIZE)
                break;
            if (strlcat(buf, qib_status_str[i], PAGE_SIZE) >=
                    PAGE_SIZE)
                break;
            any = 1;
        }
        s >>= 1;
    }
    if (any)
        strlcat(buf, "\n", PAGE_SIZE);

    ret = strlen(buf);

bail:
    return ret;
}

/* end of per-port functions */

/*
 * Start of per-port file structures and support code
 * Because we are fitting into other infrastructure, we have to supply the
 * full set of kobject/sysfs_ops structures and routines.
 */
#define QIB_PORT_ATTR(name, mode, show, store) \
    static struct qib_port_attr qib_port_attr_##name = \
        __ATTR(name, mode, show, store)

struct qib_port_attr {
    struct attribute attr;
    ssize_t (*show)(struct qib_pportdata *, char *);
    ssize_t (*store)(struct qib_pportdata *, const char *, size_t);
};

QIB_PORT_ATTR(loopback, S_IWUSR, NULL, store_loopback);
QIB_PORT_ATTR(led_override, S_IWUSR, NULL, store_led_override);
QIB_PORT_ATTR(hrtbt_enable, S_IWUSR | S_IRUGO, show_hrtbt_enb,
          store_hrtbt_enb);
QIB_PORT_ATTR(status, S_IRUGO, show_status, NULL);
QIB_PORT_ATTR(status_str, S_IRUGO, show_status_str, NULL);

static struct attribute *port_default_attributes[] = {
    &qib_port_attr_loopback.attr,
    &qib_port_attr_led_override.attr,
    &qib_port_attr_hrtbt_enable.attr,
    &qib_port_attr_status.attr,
    &qib_port_attr_status_str.attr,
    NULL
};

/*
 * Start of per-port congestion control structures and support code
 */

/*
 * Congestion control table size followed by table entries
 */
static ssize_t read_cc_table_bin(struct file *filp, struct kobject *kobj,
        struct bin_attribute *bin_attr,
        char *buf, loff_t pos, size_t count)
{
    int ret;
    struct qib_pportdata *ppd =
        container_of(kobj, struct qib_pportdata, pport_cc_kobj);

    if (!qib_cc_table_size || !ppd->ccti_entries_shadow)
        return -EINVAL;

    ret = ppd->total_cct_entry * sizeof(struct ib_cc_table_entry_shadow)
         + sizeof(__be16);

    if (pos > ret)
        return -EINVAL;

    if (count > ret - pos)
        count = ret - pos;

    if (!count)
        return count;

    spin_lock(&ppd->cc_shadow_lock);
    memcpy(buf, ppd->ccti_entries_shadow, count);
    spin_unlock(&ppd->cc_shadow_lock);

    return count;
}

static void qib_port_release(struct kobject *kobj)
{
    /* nothing to do since memory is freed by qib_free_devdata() */
}

static struct kobj_type qib_port_cc_ktype = {
    .release = qib_port_release,
};

static struct bin_attribute cc_table_bin_attr = {
    .attr = {.name = "cc_table_bin", .mode = 0444},
    .read = read_cc_table_bin,
    .size = PAGE_SIZE,
};

/*
 * Congestion settings: port control, control map and an array of 16
 * entries for the congestion entries - increase, timer, event log
 * trigger threshold and the minimum injection rate delay.
 */
static ssize_t read_cc_setting_bin(struct file *filp, struct kobject *kobj,
        struct bin_attribute *bin_attr,
        char *buf, loff_t pos, size_t count)
{
    int ret;
    struct qib_pportdata *ppd =
        container_of(kobj, struct qib_pportdata, pport_cc_kobj);

    if (!qib_cc_table_size || !ppd->congestion_entries_shadow)
        return -EINVAL;

    ret = sizeof(struct ib_cc_congestion_setting_attr_shadow);

    if (pos > ret)
        return -EINVAL;
    if (count > ret - pos)
        count = ret - pos;

    if (!count)
        return count;

    spin_lock(&ppd->cc_shadow_lock);
    memcpy(buf, ppd->congestion_entries_shadow, count);
    spin_unlock(&ppd->cc_shadow_lock);

    return count;
}

static struct bin_attribute cc_setting_bin_attr = {
    .attr = {.name = "cc_settings_bin", .mode = 0444},
    .read = read_cc_setting_bin,
    .size = PAGE_SIZE,
};


static ssize_t qib_portattr_show(struct kobject *kobj,
    struct attribute *attr, char *buf)
{
    struct qib_port_attr *pattr =
        container_of(attr, struct qib_port_attr, attr);
    struct qib_pportdata *ppd =
        container_of(kobj, struct qib_pportdata, pport_kobj);

    return pattr->show(ppd, buf);
}

static ssize_t qib_portattr_store(struct kobject *kobj,
    struct attribute *attr, const char *buf, size_t len)
{
    struct qib_port_attr *pattr =
        container_of(attr, struct qib_port_attr, attr);
    struct qib_pportdata *ppd =
        container_of(kobj, struct qib_pportdata, pport_kobj);

    return pattr->store(ppd, buf, len);
}


static const struct sysfs_ops qib_port_ops = {
    .show = qib_portattr_show,
    .store = qib_portattr_store,
};

static struct kobj_type qib_port_ktype = {
    .release = qib_port_release,
    .sysfs_ops = &qib_port_ops,
    .default_attrs = port_default_attributes
};

/* Start sl2vl */

#define QIB_SL2VL_ATTR(N) \
    static struct qib_sl2vl_attr qib_sl2vl_attr_##N = { \
        .attr = { .name = __stringify(N), .mode = 0444 }, \
        .sl = N \
    }

struct qib_sl2vl_attr {
    struct attribute attr;
    int sl;
};

QIB_SL2VL_ATTR(0);
QIB_SL2VL_ATTR(1);
QIB_SL2VL_ATTR(2);
QIB_SL2VL_ATTR(3);
QIB_SL2VL_ATTR(4);
QIB_SL2VL_ATTR(5);
QIB_SL2VL_ATTR(6);
QIB_SL2VL_ATTR(7);
QIB_SL2VL_ATTR(8);
QIB_SL2VL_ATTR(9);
QIB_SL2VL_ATTR(10);
QIB_SL2VL_ATTR(11);
QIB_SL2VL_ATTR(12);
QIB_SL2VL_ATTR(13);
QIB_SL2VL_ATTR(14);
QIB_SL2VL_ATTR(15);

static struct attribute *sl2vl_default_attributes[] = {
    &qib_sl2vl_attr_0.attr,
    &qib_sl2vl_attr_1.attr,
    &qib_sl2vl_attr_2.attr,
    &qib_sl2vl_attr_3.attr,
    &qib_sl2vl_attr_4.attr,
    &qib_sl2vl_attr_5.attr,
    &qib_sl2vl_attr_6.attr,
    &qib_sl2vl_attr_7.attr,
    &qib_sl2vl_attr_8.attr,
    &qib_sl2vl_attr_9.attr,
    &qib_sl2vl_attr_10.attr,
    &qib_sl2vl_attr_11.attr,
    &qib_sl2vl_attr_12.attr,
    &qib_sl2vl_attr_13.attr,
    &qib_sl2vl_attr_14.attr,
    &qib_sl2vl_attr_15.attr,
    NULL
};

static ssize_t sl2vl_attr_show(struct kobject *kobj, struct attribute *attr,
                   char *buf)
{
    struct qib_sl2vl_attr *sattr =
        container_of(attr, struct qib_sl2vl_attr, attr);
    struct qib_pportdata *ppd =
        container_of(kobj, struct qib_pportdata, sl2vl_kobj);
    struct qib_ibport *qibp = &ppd->ibport_data;

    return sprintf(buf, "%u\n", qibp->sl_to_vl[sattr->sl]);
}

static const struct sysfs_ops qib_sl2vl_ops = {
    .show = sl2vl_attr_show,
};

static struct kobj_type qib_sl2vl_ktype = {
    .release = qib_port_release,
    .sysfs_ops = &qib_sl2vl_ops,
    .default_attrs = sl2vl_default_attributes
};

/* End sl2vl */

/* Start diag_counters */

#define QIB_DIAGC_ATTR(N) \
    static struct qib_diagc_attr qib_diagc_attr_##N = { \
        .attr = { .name = __stringify(N), .mode = 0664 }, \
        .counter = offsetof(struct qib_ibport, n_##N) \
    }

struct qib_diagc_attr {
    struct attribute attr;
    size_t counter;
};

QIB_DIAGC_ATTR(rc_resends);
QIB_DIAGC_ATTR(rc_acks);
QIB_DIAGC_ATTR(rc_qacks);
QIB_DIAGC_ATTR(rc_delayed_comp);
QIB_DIAGC_ATTR(seq_naks);
QIB_DIAGC_ATTR(rdma_seq);
QIB_DIAGC_ATTR(rnr_naks);
QIB_DIAGC_ATTR(other_naks);
QIB_DIAGC_ATTR(rc_timeouts);
QIB_DIAGC_ATTR(loop_pkts);
QIB_DIAGC_ATTR(pkt_drops);
QIB_DIAGC_ATTR(dmawait);
QIB_DIAGC_ATTR(unaligned);
QIB_DIAGC_ATTR(rc_dupreq);
QIB_DIAGC_ATTR(rc_seqnak);

static struct attribute *diagc_default_attributes[] = {
    &qib_diagc_attr_rc_resends.attr,
    &qib_diagc_attr_rc_acks.attr,
    &qib_diagc_attr_rc_qacks.attr,
    &qib_diagc_attr_rc_delayed_comp.attr,
    &qib_diagc_attr_seq_naks.attr,
    &qib_diagc_attr_rdma_seq.attr,
    &qib_diagc_attr_rnr_naks.attr,
    &qib_diagc_attr_other_naks.attr,
    &qib_diagc_attr_rc_timeouts.attr,
    &qib_diagc_attr_loop_pkts.attr,
    &qib_diagc_attr_pkt_drops.attr,
    &qib_diagc_attr_dmawait.attr,
    &qib_diagc_attr_unaligned.attr,
    &qib_diagc_attr_rc_dupreq.attr,
    &qib_diagc_attr_rc_seqnak.attr,
    NULL
};

static ssize_t diagc_attr_show(struct kobject *kobj, struct attribute *attr,
                   char *buf)
{
    struct qib_diagc_attr *dattr =
        container_of(attr, struct qib_diagc_attr, attr);
    struct qib_pportdata *ppd =
        container_of(kobj, struct qib_pportdata, diagc_kobj);
    struct qib_ibport *qibp = &ppd->ibport_data;

    return sprintf(buf, "%u\n", *(u32 *)((char *)qibp + dattr->counter));
}

static ssize_t diagc_attr_store(struct kobject *kobj, struct attribute *attr,
                const char *buf, size_t size)
{
    struct qib_diagc_attr *dattr =
        container_of(attr, struct qib_diagc_attr, attr);
    struct qib_pportdata *ppd =
        container_of(kobj, struct qib_pportdata, diagc_kobj);
    struct qib_ibport *qibp = &ppd->ibport_data;
    u32 val;
    int ret;

    ret = kstrtou32(buf, 0, &val);
    if (ret)
        return ret;
    *(u32 *)((char *) qibp + dattr->counter) = val;
    return size;
}

static const struct sysfs_ops qib_diagc_ops = {
    .show = diagc_attr_show,
    .store = diagc_attr_store,
};

static struct kobj_type qib_diagc_ktype = {
    .release = qib_port_release,
    .sysfs_ops = &qib_diagc_ops,
    .default_attrs = diagc_default_attributes
};

/* End diag_counters */

/* end of per-port file structures and support code */

/*
 * Start of per-unit (or driver, in some cases, but replicated
 * per unit) functions (these get a device *)
 */
static ssize_t show_rev(struct device *device, struct device_attribute *attr,
            char *buf)
{
    struct qib_ibdev *dev =
        container_of(device, struct qib_ibdev, ibdev.dev);

    return sprintf(buf, "%x\n", dd_from_dev(dev)->minrev);
}

static ssize_t show_hca(struct device *device, struct device_attribute *attr,
            char *buf)
{
    struct qib_ibdev *dev =
        container_of(device, struct qib_ibdev, ibdev.dev);
    struct qib_devdata *dd = dd_from_dev(dev);
    int ret;

    if (!dd->boardname)
        ret = -EINVAL;
    else
        ret = scnprintf(buf, PAGE_SIZE, "%s\n", dd->boardname);
    return ret;
}

static ssize_t show_version(struct device *device,
                struct device_attribute *attr, char *buf)
{
    /* The string printed here is already newline-terminated. */
    return scnprintf(buf, PAGE_SIZE, "%s", (char *)ib_qib_version);
}

static ssize_t show_boardversion(struct device *device,
                 struct device_attribute *attr, char *buf)
{
    struct qib_ibdev *dev =
        container_of(device, struct qib_ibdev, ibdev.dev);
    struct qib_devdata *dd = dd_from_dev(dev);

    /* The string printed here is already newline-terminated. */
    return scnprintf(buf, PAGE_SIZE, "%s", dd->boardversion);
}


static ssize_t show_localbus_info(struct device *device,
                  struct device_attribute *attr, char *buf)
{
    struct qib_ibdev *dev =
        container_of(device, struct qib_ibdev, ibdev.dev);
    struct qib_devdata *dd = dd_from_dev(dev);

    /* The string printed here is already newline-terminated. */
    return scnprintf(buf, PAGE_SIZE, "%s", dd->lbus_info);
}


static ssize_t show_nctxts(struct device *device,
               struct device_attribute *attr, char *buf)
{
    struct qib_ibdev *dev =
        container_of(device, struct qib_ibdev, ibdev.dev);
    struct qib_devdata *dd = dd_from_dev(dev);

    /* Return the number of user ports (contexts) available. */
    /* The calculation below deals with a special case where
     * cfgctxts is set to 1 on a single-port board. */
    return scnprintf(buf, PAGE_SIZE, "%u\n",
            (dd->first_user_ctxt > dd->cfgctxts) ? 0 :
            (dd->cfgctxts - dd->first_user_ctxt));
}

static ssize_t show_nfreectxts(struct device *device,
               struct device_attribute *attr, char *buf)
{
    struct qib_ibdev *dev =
        container_of(device, struct qib_ibdev, ibdev.dev);
    struct qib_devdata *dd = dd_from_dev(dev);

    /* Return the number of free user ports (contexts) available. */
    return scnprintf(buf, PAGE_SIZE, "%u\n", dd->freectxts);
}

static ssize_t show_serial(struct device *device,
               struct device_attribute *attr, char *buf)
{
    struct qib_ibdev *dev =
        container_of(device, struct qib_ibdev, ibdev.dev);
    struct qib_devdata *dd = dd_from_dev(dev);

    buf[sizeof dd->serial] = '\0';
    memcpy(buf, dd->serial, sizeof dd->serial);
    strcat(buf, "\n");
    return strlen(buf);
}

static ssize_t store_chip_reset(struct device *device,
                struct device_attribute *attr, const char *buf,
                size_t count)
{
    struct qib_ibdev *dev =
        container_of(device, struct qib_ibdev, ibdev.dev);
    struct qib_devdata *dd = dd_from_dev(dev);
    int ret;

    if (count < 5 || memcmp(buf, "reset", 5) || !dd->diag_client) {
        ret = -EINVAL;
        goto bail;
    }

    ret = qib_reset_device(dd->unit);
bail:
    return ret < 0 ? ret : count;
}

static ssize_t show_logged_errs(struct device *device,
                struct device_attribute *attr, char *buf)
{
    struct qib_ibdev *dev =
        container_of(device, struct qib_ibdev, ibdev.dev);
    struct qib_devdata *dd = dd_from_dev(dev);
    int idx, count;

    /* force consistency with actual EEPROM */
    if (qib_update_eeprom_log(dd) != 0)
        return -ENXIO;

    count = 0;
    for (idx = 0; idx < QIB_EEP_LOG_CNT; ++idx) {
        count += scnprintf(buf + count, PAGE_SIZE - count, "%d%c",
                   dd->eep_st_errs[idx],
                   idx == (QIB_EEP_LOG_CNT - 1) ? '\n' : ' ');
    }

    return count;
}

/*
 * Dump tempsense regs. in decimal, to ease shell-scripts.
 */
static ssize_t show_tempsense(struct device *device,
                  struct device_attribute *attr, char *buf)
{
    struct qib_ibdev *dev =
        container_of(device, struct qib_ibdev, ibdev.dev);
    struct qib_devdata *dd = dd_from_dev(dev);
    int ret;
    int idx;
    u8 regvals[8];

    ret = -ENXIO;
    for (idx = 0; idx < 8; ++idx) {
        if (idx == 6)
            continue;
        ret = dd->f_tempsense_rd(dd, idx);
        if (ret < 0)
            break;
        regvals[idx] = ret;
    }
    if (idx == 8)
        ret = scnprintf(buf, PAGE_SIZE, "%d %d %02X %02X %d %d\n",
                *(signed char *)(regvals),
                *(signed char *)(regvals + 1),
                regvals[2], regvals[3],
                *(signed char *)(regvals + 5),
                *(signed char *)(regvals + 7));
    return ret;
}

/*
 * end of per-unit (or driver, in some cases, but replicated
 * per unit) functions
 */

/* start of per-unit file structures and support code */
static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
static DEVICE_ATTR(board_id, S_IRUGO, show_hca, NULL);
static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
static DEVICE_ATTR(nctxts, S_IRUGO, show_nctxts, NULL);
static DEVICE_ATTR(nfreectxts, S_IRUGO, show_nfreectxts, NULL);
static DEVICE_ATTR(serial, S_IRUGO, show_serial, NULL);
static DEVICE_ATTR(boardversion, S_IRUGO, show_boardversion, NULL);
static DEVICE_ATTR(logged_errors, S_IRUGO, show_logged_errs, NULL);
static DEVICE_ATTR(tempsense, S_IRUGO, show_tempsense, NULL);
static DEVICE_ATTR(localbus_info, S_IRUGO, show_localbus_info, NULL);
static DEVICE_ATTR(chip_reset, S_IWUSR, NULL, store_chip_reset);

static struct device_attribute *qib_attributes[] = {
    &dev_attr_hw_rev,
    &dev_attr_hca_type,
    &dev_attr_board_id,
    &dev_attr_version,
    &dev_attr_nctxts,
    &dev_attr_nfreectxts,
    &dev_attr_serial,
    &dev_attr_boardversion,
    &dev_attr_logged_errors,
    &dev_attr_tempsense,
    &dev_attr_localbus_info,
    &dev_attr_chip_reset,
};

int qib_create_port_files(struct ib_device *ibdev, u8 port_num,
              struct kobject *kobj)
{
    struct qib_pportdata *ppd;
    struct qib_devdata *dd = dd_from_ibdev(ibdev);
    int ret;

    if (!port_num || port_num > dd->num_pports) {
        qib_dev_err(dd,
            "Skipping infiniband class with invalid port %u\n",
            port_num);
        ret = -ENODEV;
        goto bail;
    }
    ppd = &dd->pport[port_num - 1];

    ret = kobject_init_and_add(&ppd->pport_kobj, &qib_port_ktype, kobj,
                   "linkcontrol");
    if (ret) {
        qib_dev_err(dd,
            "Skipping linkcontrol sysfs info, (err %d) port %u\n",
            ret, port_num);
        goto bail;
    }
    kobject_uevent(&ppd->pport_kobj, KOBJ_ADD);

    ret = kobject_init_and_add(&ppd->sl2vl_kobj, &qib_sl2vl_ktype, kobj,
                   "sl2vl");
    if (ret) {
        qib_dev_err(dd,
            "Skipping sl2vl sysfs info, (err %d) port %u\n",
            ret, port_num);
        goto bail_link;
    }
    kobject_uevent(&ppd->sl2vl_kobj, KOBJ_ADD);

    ret = kobject_init_and_add(&ppd->diagc_kobj, &qib_diagc_ktype, kobj,
                   "diag_counters");
    if (ret) {
        qib_dev_err(dd,
            "Skipping diag_counters sysfs info, (err %d) port %u\n",
            ret, port_num);
        goto bail_sl;
    }
    kobject_uevent(&ppd->diagc_kobj, KOBJ_ADD);

    if (!qib_cc_table_size || !ppd->congestion_entries_shadow)
        return 0;

    ret = kobject_init_and_add(&ppd->pport_cc_kobj, &qib_port_cc_ktype,
                kobj, "CCMgtA");
    if (ret) {
        qib_dev_err(dd,
         "Skipping Congestion Control sysfs info, (err %d) port %u\n",
         ret, port_num);
        goto bail_diagc;
    }

    kobject_uevent(&ppd->pport_cc_kobj, KOBJ_ADD);

    ret = sysfs_create_bin_file(&ppd->pport_cc_kobj,
                &cc_setting_bin_attr);
    if (ret) {
        qib_dev_err(dd,
         "Skipping Congestion Control setting sysfs info, (err %d) port %u\n",
         ret, port_num);
        goto bail_cc;
    }

    ret = sysfs_create_bin_file(&ppd->pport_cc_kobj,
                &cc_table_bin_attr);
    if (ret) {
        qib_dev_err(dd,
         "Skipping Congestion Control table sysfs info, (err %d) port %u\n",
         ret, port_num);
        goto bail_cc_entry_bin;
    }

    qib_devinfo(dd->pcidev,
        "IB%u: Congestion Control Agent enabled for port %d\n",
        dd->unit, port_num);

    return 0;

bail_cc_entry_bin:
    sysfs_remove_bin_file(&ppd->pport_cc_kobj, &cc_setting_bin_attr);
bail_cc:
    kobject_put(&ppd->pport_cc_kobj);
bail_diagc:
    kobject_put(&ppd->diagc_kobj);
bail_sl:
    kobject_put(&ppd->sl2vl_kobj);
bail_link:
    kobject_put(&ppd->pport_kobj);
bail:
    return ret;
}

/*
 * Register and create our files in /sys/class/infiniband.
 */
int qib_verbs_register_sysfs(struct qib_devdata *dd)
{
    struct ib_device *dev = &dd->verbs_dev.ibdev;
    int i, ret;

    for (i = 0; i < ARRAY_SIZE(qib_attributes); ++i) {
        ret = device_create_file(&dev->dev, qib_attributes[i]);
        if (ret)
            return ret;
    }

    return 0;
}

/*
 * Unregister and remove our files in /sys/class/infiniband.
 */
void qib_verbs_unregister_sysfs(struct qib_devdata *dd)
{
    struct qib_pportdata *ppd;
    int i;

    for (i = 0; i < dd->num_pports; i++) {
        ppd = &dd->pport[i];
        if (qib_cc_table_size &&
            ppd->congestion_entries_shadow) {
            sysfs_remove_bin_file(&ppd->pport_cc_kobj,
                &cc_setting_bin_attr);
            sysfs_remove_bin_file(&ppd->pport_cc_kobj,
                &cc_table_bin_attr);
            kobject_put(&ppd->pport_cc_kobj);
        }
        kobject_put(&ppd->sl2vl_kobj);
        kobject_put(&ppd->pport_kobj);
    }
}