ipath_sysfs.c

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/*
 * Copyright (c) 2006, 2007, 2008 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 <linux/stat.h>

#include "ipath_kernel.h"
#include "ipath_verbs.h"
#include "ipath_common.h"

int ipath_parse_ushort(const char *str, unsigned short *valp)
{
    unsigned long val;
    char *end;
    int ret;

    if (!isdigit(str[0])) {
        ret = -EINVAL;
        goto bail;
    }

    val = simple_strtoul(str, &end, 0);

    if (val > 0xffff) {
        ret = -EINVAL;
        goto bail;
    }

    *valp = val;

    ret = end + 1 - str;
    if (ret == 0)
        ret = -EINVAL;

bail:
    return ret;
}

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

static ssize_t show_num_units(struct device_driver *dev, char *buf)
{
    return scnprintf(buf, PAGE_SIZE, "%d\n",
             ipath_count_units(NULL, NULL, NULL));
}

static ssize_t show_status(struct device *dev,
               struct device_attribute *attr,
               char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    ssize_t ret;

    if (!dd->ipath_statusp) {
        ret = -EINVAL;
        goto bail;
    }

    ret = scnprintf(buf, PAGE_SIZE, "0x%llx\n",
            (unsigned long long) *(dd->ipath_statusp));

bail:
    return ret;
}

static const char *ipath_status_str[] = {
    "Initted",
    "Disabled",
    "Admin_Disabled",
    "", /* This used to be the old "OIB_SMA" status. */
    "", /* This used to be the old "SMA" status. */
    "Present",
    "IB_link_up",
    "IB_configured",
    "NoIBcable",
    "Fatal_Hardware_Error",
    NULL,
};

static ssize_t show_status_str(struct device *dev,
                   struct device_attribute *attr,
                   char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int i, any;
    u64 s;
    ssize_t ret;

    if (!dd->ipath_statusp) {
        ret = -EINVAL;
        goto bail;
    }

    s = *(dd->ipath_statusp);
    *buf = '\0';
    for (any = i = 0; s && ipath_status_str[i]; i++) {
        if (s & 1) {
            if (any && strlcat(buf, " ", PAGE_SIZE) >=
                PAGE_SIZE)
                /* overflow */
                break;
            if (strlcat(buf, ipath_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;
}

static ssize_t show_boardversion(struct device *dev,
                   struct device_attribute *attr,
                   char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    /* The string printed here is already newline-terminated. */
    return scnprintf(buf, PAGE_SIZE, "%s", dd->ipath_boardversion);
}

static ssize_t show_localbus_info(struct device *dev,
                   struct device_attribute *attr,
                   char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    /* The string printed here is already newline-terminated. */
    return scnprintf(buf, PAGE_SIZE, "%s", dd->ipath_lbus_info);
}

static ssize_t show_lmc(struct device *dev,
            struct device_attribute *attr,
            char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);

    return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_lmc);
}

static ssize_t store_lmc(struct device *dev,
             struct device_attribute *attr,
             const char *buf,
             size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    u16 lmc = 0;
    int ret;

    ret = ipath_parse_ushort(buf, &lmc);
    if (ret < 0)
        goto invalid;

    if (lmc > 7) {
        ret = -EINVAL;
        goto invalid;
    }

    ipath_set_lid(dd, dd->ipath_lid, lmc);

    goto bail;
invalid:
    ipath_dev_err(dd, "attempt to set invalid LMC %u\n", lmc);
bail:
    return ret;
}

static ssize_t show_lid(struct device *dev,
            struct device_attribute *attr,
            char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);

    return scnprintf(buf, PAGE_SIZE, "0x%x\n", dd->ipath_lid);
}

static ssize_t store_lid(struct device *dev,
             struct device_attribute *attr,
              const char *buf,
              size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    u16 lid = 0;
    int ret;

    ret = ipath_parse_ushort(buf, &lid);
    if (ret < 0)
        goto invalid;

    if (lid == 0 || lid >= IPATH_MULTICAST_LID_BASE) {
        ret = -EINVAL;
        goto invalid;
    }

    ipath_set_lid(dd, lid, dd->ipath_lmc);

    goto bail;
invalid:
    ipath_dev_err(dd, "attempt to set invalid LID 0x%x\n", lid);
bail:
    return ret;
}

static ssize_t show_mlid(struct device *dev,
             struct device_attribute *attr,
             char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);

    return scnprintf(buf, PAGE_SIZE, "0x%x\n", dd->ipath_mlid);
}

static ssize_t store_mlid(struct device *dev,
             struct device_attribute *attr,
              const char *buf,
              size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    u16 mlid;
    int ret;

    ret = ipath_parse_ushort(buf, &mlid);
    if (ret < 0 || mlid < IPATH_MULTICAST_LID_BASE)
        goto invalid;

    dd->ipath_mlid = mlid;

    goto bail;
invalid:
    ipath_dev_err(dd, "attempt to set invalid MLID\n");
bail:
    return ret;
}

static ssize_t show_guid(struct device *dev,
             struct device_attribute *attr,
             char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    u8 *guid;

    guid = (u8 *) & (dd->ipath_guid);

    return scnprintf(buf, PAGE_SIZE,
             "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
             guid[0], guid[1], guid[2], guid[3],
             guid[4], guid[5], guid[6], guid[7]);
}

static ssize_t store_guid(struct device *dev,
             struct device_attribute *attr,
              const char *buf,
              size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    ssize_t ret;
    unsigned short guid[8];
    __be64 new_guid;
    u8 *ng;
    int i;

    if (sscanf(buf, "%hx:%hx:%hx:%hx:%hx:%hx:%hx:%hx",
           &guid[0], &guid[1], &guid[2], &guid[3],
           &guid[4], &guid[5], &guid[6], &guid[7]) != 8)
        goto invalid;

    ng = (u8 *) &new_guid;

    for (i = 0; i < 8; i++) {
        if (guid[i] > 0xff)
            goto invalid;
        ng[i] = guid[i];
    }

    if (new_guid == 0)
        goto invalid;

    dd->ipath_guid = new_guid;
    dd->ipath_nguid = 1;
    if (dd->verbs_dev)
        dd->verbs_dev->ibdev.node_guid = new_guid;

    ret = strlen(buf);
    goto bail;

invalid:
    ipath_dev_err(dd, "attempt to set invalid GUID\n");
    ret = -EINVAL;

bail:
    return ret;
}

static ssize_t show_nguid(struct device *dev,
              struct device_attribute *attr,
              char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);

    return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_nguid);
}

static ssize_t show_nports(struct device *dev,
               struct device_attribute *attr,
               char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);

    /* Return the number of user ports available. */
    return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_cfgports - 1);
}

static ssize_t show_serial(struct device *dev,
               struct device_attribute *attr,
               char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);

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

static ssize_t show_unit(struct device *dev,
             struct device_attribute *attr,
             char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);

    return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_unit);
}

static ssize_t show_jint_max_packets(struct device *dev,
                     struct device_attribute *attr,
                     char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);

    return scnprintf(buf, PAGE_SIZE, "%hu\n", dd->ipath_jint_max_packets);
}

static ssize_t store_jint_max_packets(struct device *dev,
                      struct device_attribute *attr,
                      const char *buf,
                      size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    u16 v = 0;
    int ret;

    ret = ipath_parse_ushort(buf, &v);
    if (ret < 0)
        ipath_dev_err(dd, "invalid jint_max_packets.\n");
    else
        dd->ipath_f_config_jint(dd, dd->ipath_jint_idle_ticks, v);

    return ret;
}

static ssize_t show_jint_idle_ticks(struct device *dev,
                    struct device_attribute *attr,
                    char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);

    return scnprintf(buf, PAGE_SIZE, "%hu\n", dd->ipath_jint_idle_ticks);
}

static ssize_t store_jint_idle_ticks(struct device *dev,
                     struct device_attribute *attr,
                     const char *buf,
                     size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    u16 v = 0;
    int ret;

    ret = ipath_parse_ushort(buf, &v);
    if (ret < 0)
        ipath_dev_err(dd, "invalid jint_idle_ticks.\n");
    else
        dd->ipath_f_config_jint(dd, v, dd->ipath_jint_max_packets);

    return ret;
}

#define DEVICE_COUNTER(name, attr) \
    static ssize_t show_counter_##name(struct device *dev, \
                       struct device_attribute *attr, \
                       char *buf) \
    { \
        struct ipath_devdata *dd = dev_get_drvdata(dev); \
        return scnprintf(\
            buf, PAGE_SIZE, "%llu\n", (unsigned long long) \
            ipath_snap_cntr( \
                dd, offsetof(struct infinipath_counters, \
                         attr) / sizeof(u64))); \
    } \
    static DEVICE_ATTR(name, S_IRUGO, show_counter_##name, NULL);

DEVICE_COUNTER(ib_link_downeds, IBLinkDownedCnt);
DEVICE_COUNTER(ib_link_err_recoveries, IBLinkErrRecoveryCnt);
DEVICE_COUNTER(ib_status_changes, IBStatusChangeCnt);
DEVICE_COUNTER(ib_symbol_errs, IBSymbolErrCnt);
DEVICE_COUNTER(lb_flow_stalls, LBFlowStallCnt);
DEVICE_COUNTER(lb_ints, LBIntCnt);
DEVICE_COUNTER(rx_bad_formats, RxBadFormatCnt);
DEVICE_COUNTER(rx_buf_ovfls, RxBufOvflCnt);
DEVICE_COUNTER(rx_data_pkts, RxDataPktCnt);
DEVICE_COUNTER(rx_dropped_pkts, RxDroppedPktCnt);
DEVICE_COUNTER(rx_dwords, RxDwordCnt);
DEVICE_COUNTER(rx_ebps, RxEBPCnt);
DEVICE_COUNTER(rx_flow_ctrl_errs, RxFlowCtrlErrCnt);
DEVICE_COUNTER(rx_flow_pkts, RxFlowPktCnt);
DEVICE_COUNTER(rx_icrc_errs, RxICRCErrCnt);
DEVICE_COUNTER(rx_len_errs, RxLenErrCnt);
DEVICE_COUNTER(rx_link_problems, RxLinkProblemCnt);
DEVICE_COUNTER(rx_lpcrc_errs, RxLPCRCErrCnt);
DEVICE_COUNTER(rx_max_min_len_errs, RxMaxMinLenErrCnt);
DEVICE_COUNTER(rx_p0_hdr_egr_ovfls, RxP0HdrEgrOvflCnt);
DEVICE_COUNTER(rx_p1_hdr_egr_ovfls, RxP1HdrEgrOvflCnt);
DEVICE_COUNTER(rx_p2_hdr_egr_ovfls, RxP2HdrEgrOvflCnt);
DEVICE_COUNTER(rx_p3_hdr_egr_ovfls, RxP3HdrEgrOvflCnt);
DEVICE_COUNTER(rx_p4_hdr_egr_ovfls, RxP4HdrEgrOvflCnt);
DEVICE_COUNTER(rx_p5_hdr_egr_ovfls, RxP5HdrEgrOvflCnt);
DEVICE_COUNTER(rx_p6_hdr_egr_ovfls, RxP6HdrEgrOvflCnt);
DEVICE_COUNTER(rx_p7_hdr_egr_ovfls, RxP7HdrEgrOvflCnt);
DEVICE_COUNTER(rx_p8_hdr_egr_ovfls, RxP8HdrEgrOvflCnt);
DEVICE_COUNTER(rx_pkey_mismatches, RxPKeyMismatchCnt);
DEVICE_COUNTER(rx_tid_full_errs, RxTIDFullErrCnt);
DEVICE_COUNTER(rx_tid_valid_errs, RxTIDValidErrCnt);
DEVICE_COUNTER(rx_vcrc_errs, RxVCRCErrCnt);
DEVICE_COUNTER(tx_data_pkts, TxDataPktCnt);
DEVICE_COUNTER(tx_dropped_pkts, TxDroppedPktCnt);
DEVICE_COUNTER(tx_dwords, TxDwordCnt);
DEVICE_COUNTER(tx_flow_pkts, TxFlowPktCnt);
DEVICE_COUNTER(tx_flow_stalls, TxFlowStallCnt);
DEVICE_COUNTER(tx_len_errs, TxLenErrCnt);
DEVICE_COUNTER(tx_max_min_len_errs, TxMaxMinLenErrCnt);
DEVICE_COUNTER(tx_underruns, TxUnderrunCnt);
DEVICE_COUNTER(tx_unsup_vl_errs, TxUnsupVLErrCnt);

static struct attribute *dev_counter_attributes[] = {
    &dev_attr_ib_link_downeds.attr,
    &dev_attr_ib_link_err_recoveries.attr,
    &dev_attr_ib_status_changes.attr,
    &dev_attr_ib_symbol_errs.attr,
    &dev_attr_lb_flow_stalls.attr,
    &dev_attr_lb_ints.attr,
    &dev_attr_rx_bad_formats.attr,
    &dev_attr_rx_buf_ovfls.attr,
    &dev_attr_rx_data_pkts.attr,
    &dev_attr_rx_dropped_pkts.attr,
    &dev_attr_rx_dwords.attr,
    &dev_attr_rx_ebps.attr,
    &dev_attr_rx_flow_ctrl_errs.attr,
    &dev_attr_rx_flow_pkts.attr,
    &dev_attr_rx_icrc_errs.attr,
    &dev_attr_rx_len_errs.attr,
    &dev_attr_rx_link_problems.attr,
    &dev_attr_rx_lpcrc_errs.attr,
    &dev_attr_rx_max_min_len_errs.attr,
    &dev_attr_rx_p0_hdr_egr_ovfls.attr,
    &dev_attr_rx_p1_hdr_egr_ovfls.attr,
    &dev_attr_rx_p2_hdr_egr_ovfls.attr,
    &dev_attr_rx_p3_hdr_egr_ovfls.attr,
    &dev_attr_rx_p4_hdr_egr_ovfls.attr,
    &dev_attr_rx_p5_hdr_egr_ovfls.attr,
    &dev_attr_rx_p6_hdr_egr_ovfls.attr,
    &dev_attr_rx_p7_hdr_egr_ovfls.attr,
    &dev_attr_rx_p8_hdr_egr_ovfls.attr,
    &dev_attr_rx_pkey_mismatches.attr,
    &dev_attr_rx_tid_full_errs.attr,
    &dev_attr_rx_tid_valid_errs.attr,
    &dev_attr_rx_vcrc_errs.attr,
    &dev_attr_tx_data_pkts.attr,
    &dev_attr_tx_dropped_pkts.attr,
    &dev_attr_tx_dwords.attr,
    &dev_attr_tx_flow_pkts.attr,
    &dev_attr_tx_flow_stalls.attr,
    &dev_attr_tx_len_errs.attr,
    &dev_attr_tx_max_min_len_errs.attr,
    &dev_attr_tx_underruns.attr,
    &dev_attr_tx_unsup_vl_errs.attr,
    NULL
};

static struct attribute_group dev_counter_attr_group = {
    .name = "counters",
    .attrs = dev_counter_attributes
};

static ssize_t store_reset(struct device *dev,
             struct device_attribute *attr,
              const char *buf,
              size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int ret;

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

    if (dd->ipath_flags & IPATH_DISABLED) {
        /*
         * post-reset init would re-enable interrupts, etc.
         * so don't allow reset on disabled devices.  Not
         * perfect error, but about the best choice.
         */
        dev_info(dev,"Unit %d is disabled, can't reset\n",
             dd->ipath_unit);
        ret = -EINVAL;
        goto bail;
    }
    ret = ipath_reset_device(dd->ipath_unit);
bail:
    return ret<0 ? ret : count;
}

static ssize_t store_link_state(struct device *dev,
             struct device_attribute *attr,
              const char *buf,
              size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int ret, r;
    u16 state;

    ret = ipath_parse_ushort(buf, &state);
    if (ret < 0)
        goto invalid;

    r = ipath_set_linkstate(dd, state);
    if (r < 0) {
        ret = r;
        goto bail;
    }

    goto bail;
invalid:
    ipath_dev_err(dd, "attempt to set invalid link state\n");
bail:
    return ret;
}

static ssize_t show_mtu(struct device *dev,
             struct device_attribute *attr,
             char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_ibmtu);
}

static ssize_t store_mtu(struct device *dev,
             struct device_attribute *attr,
              const char *buf,
              size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    ssize_t ret;
    u16 mtu = 0;
    int r;

    ret = ipath_parse_ushort(buf, &mtu);
    if (ret < 0)
        goto invalid;

    r = ipath_set_mtu(dd, mtu);
    if (r < 0)
        ret = r;

    goto bail;
invalid:
    ipath_dev_err(dd, "attempt to set invalid MTU\n");
bail:
    return ret;
}

static ssize_t show_enabled(struct device *dev,
             struct device_attribute *attr,
             char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    return scnprintf(buf, PAGE_SIZE, "%u\n",
             (dd->ipath_flags & IPATH_DISABLED) ? 0 : 1);
}

static ssize_t store_enabled(struct device *dev,
             struct device_attribute *attr,
              const char *buf,
              size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    ssize_t ret;
    u16 enable = 0;

    ret = ipath_parse_ushort(buf, &enable);
    if (ret < 0) {
        ipath_dev_err(dd, "attempt to use non-numeric on enable\n");
        goto bail;
    }

    if (enable) {
        if (!(dd->ipath_flags & IPATH_DISABLED))
            goto bail;

        dev_info(dev, "Enabling unit %d\n", dd->ipath_unit);
        /* same as post-reset */
        ret = ipath_init_chip(dd, 1);
        if (ret)
            ipath_dev_err(dd, "Failed to enable unit %d\n",
                      dd->ipath_unit);
        else {
            dd->ipath_flags &= ~IPATH_DISABLED;
            *dd->ipath_statusp &= ~IPATH_STATUS_ADMIN_DISABLED;
        }
    }
    else if (!(dd->ipath_flags & IPATH_DISABLED)) {
        dev_info(dev, "Disabling unit %d\n", dd->ipath_unit);
        ipath_shutdown_device(dd);
        dd->ipath_flags |= IPATH_DISABLED;
        *dd->ipath_statusp |= IPATH_STATUS_ADMIN_DISABLED;
    }

bail:
    return ret;
}

static ssize_t store_rx_pol_inv(struct device *dev,
              struct device_attribute *attr,
              const char *buf,
              size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int ret, r;
    u16 val;

    ret = ipath_parse_ushort(buf, &val);
    if (ret < 0)
        goto invalid;

    r = ipath_set_rx_pol_inv(dd, val);
    if (r < 0) {
        ret = r;
        goto bail;
    }

    goto bail;
invalid:
    ipath_dev_err(dd, "attempt to set invalid Rx Polarity invert\n");
bail:
    return ret;
}

static ssize_t store_led_override(struct device *dev,
              struct device_attribute *attr,
              const char *buf,
              size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int ret;
    u16 val;

    ret = ipath_parse_ushort(buf, &val);
    if (ret > 0)
        ipath_set_led_override(dd, val);
    else
        ipath_dev_err(dd, "attempt to set invalid LED override\n");
    return ret;
}

static ssize_t show_logged_errs(struct device *dev,
                struct device_attribute *attr,
                char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int idx, count;

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

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

    return count;
}

/*
 * New sysfs entries to control various IB config. These all turn into
 * accesses via ipath_f_get/set_ib_cfg.
 *
 * Get/Set heartbeat enable. Or of 1=enabled, 2=auto
 */
static ssize_t show_hrtbt_enb(struct device *dev,
             struct device_attribute *attr,
             char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int ret;

    ret = dd->ipath_f_get_ib_cfg(dd, IPATH_IB_CFG_HRTBT);
    if (ret >= 0)
        ret = scnprintf(buf, PAGE_SIZE, "%d\n", ret);
    return ret;
}

static ssize_t store_hrtbt_enb(struct device *dev,
              struct device_attribute *attr,
              const char *buf,
              size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int ret, r;
    u16 val;

    ret = ipath_parse_ushort(buf, &val);
    if (ret >= 0 && val > 3)
        ret = -EINVAL;
    if (ret < 0) {
        ipath_dev_err(dd, "attempt to set invalid Heartbeat enable\n");
        goto bail;
    }

    /*
     * 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.
     */
    r = dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_HRTBT, val);
    if (r < 0)
        ret = r;
    else if (val == IPATH_IB_HRTBT_OFF)
        dd->ipath_flags |= IPATH_NO_HRTBT;
    else
        dd->ipath_flags &= ~IPATH_NO_HRTBT;

bail:
    return ret;
}

/*
 * Get/Set Link-widths enabled. Or of 1=1x, 2=4x (this is human/IB centric,
 * _not_ the particular encoding of any given chip)
 */
static ssize_t show_lwid_enb(struct device *dev,
             struct device_attribute *attr,
             char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int ret;

    ret = dd->ipath_f_get_ib_cfg(dd, IPATH_IB_CFG_LWID_ENB);
    if (ret >= 0)
        ret = scnprintf(buf, PAGE_SIZE, "%d\n", ret);
    return ret;
}

static ssize_t store_lwid_enb(struct device *dev,
              struct device_attribute *attr,
              const char *buf,
              size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int ret, r;
    u16 val;

    ret = ipath_parse_ushort(buf, &val);
    if (ret >= 0 && (val == 0 || val > 3))
        ret = -EINVAL;
    if (ret < 0) {
        ipath_dev_err(dd,
            "attempt to set invalid Link Width (enable)\n");
        goto bail;
    }

    r = dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_LWID_ENB, val);
    if (r < 0)
        ret = r;

bail:
    return ret;
}

/* Get current link width */
static ssize_t show_lwid(struct device *dev,
             struct device_attribute *attr,
             char *buf)

{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int ret;

    ret = dd->ipath_f_get_ib_cfg(dd, IPATH_IB_CFG_LWID);
    if (ret >= 0)
        ret = scnprintf(buf, PAGE_SIZE, "%d\n", ret);
    return ret;
}

/*
 * Get/Set Link-speeds enabled. Or of 1=SDR 2=DDR.
 */
static ssize_t show_spd_enb(struct device *dev,
             struct device_attribute *attr,
             char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int ret;

    ret = dd->ipath_f_get_ib_cfg(dd, IPATH_IB_CFG_SPD_ENB);
    if (ret >= 0)
        ret = scnprintf(buf, PAGE_SIZE, "%d\n", ret);
    return ret;
}

static ssize_t store_spd_enb(struct device *dev,
              struct device_attribute *attr,
              const char *buf,
              size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int ret, r;
    u16 val;

    ret = ipath_parse_ushort(buf, &val);
    if (ret >= 0 && (val == 0 || val > (IPATH_IB_SDR | IPATH_IB_DDR)))
        ret = -EINVAL;
    if (ret < 0) {
        ipath_dev_err(dd,
            "attempt to set invalid Link Speed (enable)\n");
        goto bail;
    }

    r = dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_SPD_ENB, val);
    if (r < 0)
        ret = r;

bail:
    return ret;
}

/* Get current link speed */
static ssize_t show_spd(struct device *dev,
             struct device_attribute *attr,
             char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int ret;

    ret = dd->ipath_f_get_ib_cfg(dd, IPATH_IB_CFG_SPD);
    if (ret >= 0)
        ret = scnprintf(buf, PAGE_SIZE, "%d\n", ret);
    return ret;
}

/*
 * Get/Set RX polarity-invert enable. 0=no, 1=yes.
 */
static ssize_t show_rx_polinv_enb(struct device *dev,
             struct device_attribute *attr,
             char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int ret;

    ret = dd->ipath_f_get_ib_cfg(dd, IPATH_IB_CFG_RXPOL_ENB);
    if (ret >= 0)
        ret = scnprintf(buf, PAGE_SIZE, "%d\n", ret);
    return ret;
}

static ssize_t store_rx_polinv_enb(struct device *dev,
              struct device_attribute *attr,
              const char *buf,
              size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int ret, r;
    u16 val;

    ret = ipath_parse_ushort(buf, &val);
    if (ret >= 0 && val > 1) {
        ipath_dev_err(dd,
            "attempt to set invalid Rx Polarity (enable)\n");
        ret = -EINVAL;
        goto bail;
    }

    r = dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_RXPOL_ENB, val);
    if (r < 0)
        ret = r;

bail:
    return ret;
}

/*
 * Get/Set RX lane-reversal enable. 0=no, 1=yes.
 */
static ssize_t show_lanerev_enb(struct device *dev,
             struct device_attribute *attr,
             char *buf)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int ret;

    ret = dd->ipath_f_get_ib_cfg(dd, IPATH_IB_CFG_LREV_ENB);
    if (ret >= 0)
        ret = scnprintf(buf, PAGE_SIZE, "%d\n", ret);
    return ret;
}

static ssize_t store_lanerev_enb(struct device *dev,
              struct device_attribute *attr,
              const char *buf,
              size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int ret, r;
    u16 val;

    ret = ipath_parse_ushort(buf, &val);
    if (ret >= 0 && val > 1) {
        ret = -EINVAL;
        ipath_dev_err(dd,
            "attempt to set invalid Lane reversal (enable)\n");
        goto bail;
    }

    r = dd->ipath_f_set_ib_cfg(dd, IPATH_IB_CFG_LREV_ENB, val);
    if (r < 0)
        ret = r;

bail:
    return ret;
}

static DRIVER_ATTR(num_units, S_IRUGO, show_num_units, NULL);
static DRIVER_ATTR(version, S_IRUGO, show_version, NULL);

static struct attribute *driver_attributes[] = {
    &driver_attr_num_units.attr,
    &driver_attr_version.attr,
    NULL
};

static struct attribute_group driver_attr_group = {
    .attrs = driver_attributes
};

static ssize_t store_tempsense(struct device *dev,
                   struct device_attribute *attr,
                   const char *buf,
                   size_t count)
{
    struct ipath_devdata *dd = dev_get_drvdata(dev);
    int ret, stat;
    u16 val;

    ret = ipath_parse_ushort(buf, &val);
    if (ret <= 0) {
        ipath_dev_err(dd, "attempt to set invalid tempsense config\n");
        goto bail;
    }
    /* If anything but the highest limit, enable T_CRIT_A "interrupt" */
    stat = ipath_tempsense_write(dd, 9, (val == 0x7f7f) ? 0x80 : 0);
    if (stat) {
        ipath_dev_err(dd, "Unable to set tempsense config\n");
        ret = -1;
        goto bail;
    }
    stat = ipath_tempsense_write(dd, 0xB, (u8) (val & 0xFF));
    if (stat) {
        ipath_dev_err(dd, "Unable to set local Tcrit\n");
        ret = -1;
        goto bail;
    }
    stat = ipath_tempsense_write(dd, 0xD, (u8) (val >> 8));
    if (stat) {
        ipath_dev_err(dd, "Unable to set remote Tcrit\n");
        ret = -1;
        goto bail;
    }

bail:
    return ret;
}

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

    ret = -ENXIO;
    for (idx = 0; idx < 8; ++idx) {
        if (idx == 6)
            continue;
        ret = ipath_tempsense_read(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;
}

const struct attribute_group *ipath_driver_attr_groups[] = {
    &driver_attr_group,
    NULL,
};

static DEVICE_ATTR(guid, S_IWUSR | S_IRUGO, show_guid, store_guid);
static DEVICE_ATTR(lmc, S_IWUSR | S_IRUGO, show_lmc, store_lmc);
static DEVICE_ATTR(lid, S_IWUSR | S_IRUGO, show_lid, store_lid);
static DEVICE_ATTR(link_state, S_IWUSR, NULL, store_link_state);
static DEVICE_ATTR(mlid, S_IWUSR | S_IRUGO, show_mlid, store_mlid);
static DEVICE_ATTR(mtu, S_IWUSR | S_IRUGO, show_mtu, store_mtu);
static DEVICE_ATTR(enabled, S_IWUSR | S_IRUGO, show_enabled, store_enabled);
static DEVICE_ATTR(nguid, S_IRUGO, show_nguid, NULL);
static DEVICE_ATTR(nports, S_IRUGO, show_nports, NULL);
static DEVICE_ATTR(reset, S_IWUSR, NULL, store_reset);
static DEVICE_ATTR(serial, S_IRUGO, show_serial, NULL);
static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
static DEVICE_ATTR(status_str, S_IRUGO, show_status_str, NULL);
static DEVICE_ATTR(boardversion, S_IRUGO, show_boardversion, NULL);
static DEVICE_ATTR(unit, S_IRUGO, show_unit, NULL);
static DEVICE_ATTR(rx_pol_inv, S_IWUSR, NULL, store_rx_pol_inv);
static DEVICE_ATTR(led_override, S_IWUSR, NULL, store_led_override);
static DEVICE_ATTR(logged_errors, S_IRUGO, show_logged_errs, NULL);
static DEVICE_ATTR(localbus_info, S_IRUGO, show_localbus_info, NULL);
static DEVICE_ATTR(jint_max_packets, S_IWUSR | S_IRUGO,
           show_jint_max_packets, store_jint_max_packets);
static DEVICE_ATTR(jint_idle_ticks, S_IWUSR | S_IRUGO,
           show_jint_idle_ticks, store_jint_idle_ticks);
static DEVICE_ATTR(tempsense, S_IWUSR | S_IRUGO,
           show_tempsense, store_tempsense);

static struct attribute *dev_attributes[] = {
    &dev_attr_guid.attr,
    &dev_attr_lmc.attr,
    &dev_attr_lid.attr,
    &dev_attr_link_state.attr,
    &dev_attr_mlid.attr,
    &dev_attr_mtu.attr,
    &dev_attr_nguid.attr,
    &dev_attr_nports.attr,
    &dev_attr_serial.attr,
    &dev_attr_status.attr,
    &dev_attr_status_str.attr,
    &dev_attr_boardversion.attr,
    &dev_attr_unit.attr,
    &dev_attr_enabled.attr,
    &dev_attr_rx_pol_inv.attr,
    &dev_attr_led_override.attr,
    &dev_attr_logged_errors.attr,
    &dev_attr_tempsense.attr,
    &dev_attr_localbus_info.attr,
    NULL
};

static struct attribute_group dev_attr_group = {
    .attrs = dev_attributes
};

static DEVICE_ATTR(hrtbt_enable, S_IWUSR | S_IRUGO, show_hrtbt_enb,
           store_hrtbt_enb);
static DEVICE_ATTR(link_width_enable, S_IWUSR | S_IRUGO, show_lwid_enb,
           store_lwid_enb);
static DEVICE_ATTR(link_width, S_IRUGO, show_lwid, NULL);
static DEVICE_ATTR(link_speed_enable, S_IWUSR | S_IRUGO, show_spd_enb,
           store_spd_enb);
static DEVICE_ATTR(link_speed, S_IRUGO, show_spd, NULL);
static DEVICE_ATTR(rx_pol_inv_enable, S_IWUSR | S_IRUGO, show_rx_polinv_enb,
           store_rx_polinv_enb);
static DEVICE_ATTR(rx_lane_rev_enable, S_IWUSR | S_IRUGO, show_lanerev_enb,
           store_lanerev_enb);

static struct attribute *dev_ibcfg_attributes[] = {
    &dev_attr_hrtbt_enable.attr,
    &dev_attr_link_width_enable.attr,
    &dev_attr_link_width.attr,
    &dev_attr_link_speed_enable.attr,
    &dev_attr_link_speed.attr,
    &dev_attr_rx_pol_inv_enable.attr,
    &dev_attr_rx_lane_rev_enable.attr,
    NULL
};

static struct attribute_group dev_ibcfg_attr_group = {
    .attrs = dev_ibcfg_attributes
};

int ipath_expose_reset(struct device *dev)
{
    static int exposed;
    int ret;

    if (!exposed) {
        ret = device_create_file(dev, &dev_attr_reset);
        exposed = 1;
    }
    else
        ret = 0;

    return ret;
}

int ipath_device_create_group(struct device *dev, struct ipath_devdata *dd)
{
    int ret;

    ret = sysfs_create_group(&dev->kobj, &dev_attr_group);
    if (ret)
        goto bail;

    ret = sysfs_create_group(&dev->kobj, &dev_counter_attr_group);
    if (ret)
        goto bail_attrs;

    if (dd->ipath_flags & IPATH_HAS_MULT_IB_SPEED) {
        ret = device_create_file(dev, &dev_attr_jint_idle_ticks);
        if (ret)
            goto bail_counter;
        ret = device_create_file(dev, &dev_attr_jint_max_packets);
        if (ret)
            goto bail_idle;

        ret = sysfs_create_group(&dev->kobj, &dev_ibcfg_attr_group);
        if (ret)
            goto bail_max;
    }

    return 0;

bail_max:
    device_remove_file(dev, &dev_attr_jint_max_packets);
bail_idle:
    device_remove_file(dev, &dev_attr_jint_idle_ticks);
bail_counter:
    sysfs_remove_group(&dev->kobj, &dev_counter_attr_group);
bail_attrs:
    sysfs_remove_group(&dev->kobj, &dev_attr_group);
bail:
    return ret;
}

void ipath_device_remove_group(struct device *dev, struct ipath_devdata *dd)
{
    sysfs_remove_group(&dev->kobj, &dev_counter_attr_group);

    if (dd->ipath_flags & IPATH_HAS_MULT_IB_SPEED) {
        sysfs_remove_group(&dev->kobj, &dev_ibcfg_attr_group);
        device_remove_file(dev, &dev_attr_jint_idle_ticks);
        device_remove_file(dev, &dev_attr_jint_max_packets);
    }

    sysfs_remove_group(&dev->kobj, &dev_attr_group);

    device_remove_file(dev, &dev_attr_reset);
}