ipath_sysfs.c

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/*
 * Copyright (c) 2006, 2007 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 "ipath_kernel.h"
#include "ipath_common.h"

/**
 * ipath_parse_ushort - parse an unsigned short value in an arbitrary base
 * @str: the string containing the number
 * @valp: where to put the result
 *
 * returns the number of bytes consumed, or negative value on error
 */
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_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;

	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);
}

#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);