ipath_sysfs.c

来自「linux 内核源代码」· C语言 代码 · 共 807 行 · 第 1/2 页

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;
	}
	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;
}

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 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 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,
	NULL
};

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

/**
 * ipath_expose_reset - create a device reset file
 * @dev: the device structure
 *
 * Only expose a file that lets us reset the device after someone
 * enters diag mode.  A device reset is quite likely to crash the
 * machine entirely, so we don't want to normally make it
 * available.
 *
 * Called with ipath_mutex held.
 */
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_driver_create_group(struct device_driver *drv)
{
	int ret;

	ret = sysfs_create_group(&drv->kobj, &driver_attr_group);

	return ret;
}

void ipath_driver_remove_group(struct device_driver *drv)
{
	sysfs_remove_group(&drv->kobj, &driver_attr_group);
}

int ipath_device_create_group(struct device *dev, struct ipath_devdata *dd)
{
	int ret;
	char unit[5];

	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;

	snprintf(unit, sizeof(unit), "%02d", dd->ipath_unit);
	ret = sysfs_create_link(&dev->driver->kobj, &dev->kobj, unit);
	if (ret == 0)
		goto bail;

	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)
{
	char unit[5];

	snprintf(unit, sizeof(unit), "%02d", dd->ipath_unit);
	sysfs_remove_link(&dev->driver->kobj, unit);

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

	device_remove_file(dev, &dev_attr_reset);
}