ipath_sysfs.c

来自「LINUX 2.6.17.4的源码」· C语言 代码 · 共 791 行 · 第 1/2 页

/*
 * 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/pci.h>

#include "ipath_kernel.h"
#include "ips_common.h"
#include "ipath_layer.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", ipath_core_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));
}

#define DRIVER_STAT(name, attr) \
	static ssize_t show_stat_##name(struct device_driver *dev, \
					char *buf) \
	{ \
		return scnprintf( \
			buf, PAGE_SIZE, "%llu\n", \
			(unsigned long long) ipath_stats.sps_ ##attr); \
	} \
	static DRIVER_ATTR(name, S_IRUGO, show_stat_##name, NULL)

DRIVER_STAT(intrs, ints);
DRIVER_STAT(err_intrs, errints);
DRIVER_STAT(errs, errs);
DRIVER_STAT(pkt_errs, pkterrs);
DRIVER_STAT(crc_errs, crcerrs);
DRIVER_STAT(hw_errs, hwerrs);
DRIVER_STAT(ib_link, iblink);
DRIVER_STAT(port0_pkts, port0pkts);
DRIVER_STAT(ether_spkts, ether_spkts);
DRIVER_STAT(ether_rpkts, ether_rpkts);
DRIVER_STAT(sma_spkts, sma_spkts);
DRIVER_STAT(sma_rpkts, sma_rpkts);
DRIVER_STAT(hdrq_full, hdrqfull);
DRIVER_STAT(etid_full, etidfull);
DRIVER_STAT(no_piobufs, nopiobufs);
DRIVER_STAT(ports, ports);
DRIVER_STAT(pkey0, pkeys[0]);
DRIVER_STAT(pkey1, pkeys[1]);
DRIVER_STAT(pkey2, pkeys[2]);
DRIVER_STAT(pkey3, pkeys[3]);
/* XXX fix the following when dynamic table of devices used */
DRIVER_STAT(lid0, lid[0]);
DRIVER_STAT(lid1, lid[1]);
DRIVER_STAT(lid2, lid[2]);
DRIVER_STAT(lid3, lid[3]);

DRIVER_STAT(nports, nports);
DRIVER_STAT(null_intr, nullintr);
DRIVER_STAT(max_pkts_call, maxpkts_call);
DRIVER_STAT(avg_pkts_call, avgpkts_call);
DRIVER_STAT(page_locks, pagelocks);
DRIVER_STAT(page_unlocks, pageunlocks);
DRIVER_STAT(krdrops, krdrops);
/* XXX fix the following when dynamic table of devices used */
DRIVER_STAT(mlid0, mlid[0]);
DRIVER_STAT(mlid1, mlid[1]);
DRIVER_STAT(mlid2, mlid[2]);
DRIVER_STAT(mlid3, mlid[3]);

static struct attribute *driver_stat_attributes[] = {
	&driver_attr_intrs.attr,
	&driver_attr_err_intrs.attr,
	&driver_attr_errs.attr,
	&driver_attr_pkt_errs.attr,
	&driver_attr_crc_errs.attr,
	&driver_attr_hw_errs.attr,
	&driver_attr_ib_link.attr,
	&driver_attr_port0_pkts.attr,
	&driver_attr_ether_spkts.attr,
	&driver_attr_ether_rpkts.attr,
	&driver_attr_sma_spkts.attr,
	&driver_attr_sma_rpkts.attr,
	&driver_attr_hdrq_full.attr,
	&driver_attr_etid_full.attr,
	&driver_attr_no_piobufs.attr,
	&driver_attr_ports.attr,
	&driver_attr_pkey0.attr,
	&driver_attr_pkey1.attr,
	&driver_attr_pkey2.attr,
	&driver_attr_pkey3.attr,
	&driver_attr_lid0.attr,
	&driver_attr_lid1.attr,
	&driver_attr_lid2.attr,
	&driver_attr_lid3.attr,
	&driver_attr_nports.attr,
	&driver_attr_null_intr.attr,
	&driver_attr_max_pkts_call.attr,
	&driver_attr_avg_pkts_call.attr,
	&driver_attr_page_locks.attr,
	&driver_attr_page_unlocks.attr,
	&driver_attr_krdrops.attr,
	&driver_attr_mlid0.attr,
	&driver_attr_mlid1.attr,
	&driver_attr_mlid2.attr,
	&driver_attr_mlid3.attr,
	NULL
};

static struct attribute_group driver_stat_attr_group = {
	.name = "stats",
	.attrs = driver_stat_attributes
};

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",
	"OIB_SMA",
	"SMA",
	"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_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;
	int ret;

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

	if (lid == 0 || lid >= 0xc000) {
		ret = -EINVAL;
		goto invalid;
	}

	ipath_set_sps_lid(dd, lid, 0);

	goto bail;
invalid:
	ipath_dev_err(dd, "attempt to set invalid LID\n");
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);
	int unit;
	u16 mlid;
	int ret;

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

	unit = dd->ipath_unit;

	dd->ipath_mlid = mlid;
	ipath_stats.sps_mlid[unit] = mlid;
	ipath_layer_intr(dd, IPATH_LAYER_INT_BCAST);

	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 nguid;
	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 *) &nguid;

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

	dd->ipath_guid = nguid;
	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_serial(struct device *dev,
			   struct device_attribute *attr,