[mirror_ubuntu-zesty-kernel.git] / drivers / s390 / net / ctcm_sysfs.c

/*
 * Copyright IBM Corp. 2007, 2007
 * Authors:	Peter Tiedemann (ptiedem@de.ibm.com)
 *
 */

#undef DEBUG
#undef DEBUGDATA
#undef DEBUGCCW

#define KMSG_COMPONENT "ctcm"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt

#include <linux/device.h>
#include <linux/sysfs.h>
#include <linux/slab.h>
#include "ctcm_main.h"

/*
 * sysfs attributes
 */

static ssize_t ctcm_buffer_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct ctcm_priv *priv = dev_get_drvdata(dev);

	if (!priv)
		return -ENODEV;
	return sprintf(buf, "%d\n", priv->buffer_size);
}

static ssize_t ctcm_buffer_write(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct net_device *ndev;
	unsigned int bs1;
	struct ctcm_priv *priv = dev_get_drvdata(dev);
	int rc;

	ndev = priv->channel[CTCM_READ]->netdev;
	if (!(priv && priv->channel[CTCM_READ] && ndev)) {
		CTCM_DBF_TEXT(SETUP, CTC_DBF_ERROR, "bfnondev");
		return -ENODEV;
	}

	rc = kstrtouint(buf, 0, &bs1);
	if (rc)
		goto einval;
	if (bs1 > CTCM_BUFSIZE_LIMIT)
					goto einval;
	if (bs1 < (576 + LL_HEADER_LENGTH + 2))
					goto einval;
	priv->buffer_size = bs1;	/* just to overwrite the default */

	if ((ndev->flags & IFF_RUNNING) &&
	    (bs1 < (ndev->mtu + LL_HEADER_LENGTH + 2)))
					goto einval;

	priv->channel[CTCM_READ]->max_bufsize = bs1;
	priv->channel[CTCM_WRITE]->max_bufsize = bs1;
	if (!(ndev->flags & IFF_RUNNING))
		ndev->mtu = bs1 - LL_HEADER_LENGTH - 2;
	priv->channel[CTCM_READ]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
	priv->channel[CTCM_WRITE]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;

	CTCM_DBF_DEV(SETUP, ndev, buf);
	return count;

einval:
	CTCM_DBF_DEV(SETUP, ndev, "buff_err");
	return -EINVAL;
}

static void ctcm_print_statistics(struct ctcm_priv *priv)
{
	char *sbuf;
	char *p;

	if (!priv)
		return;
	sbuf = kmalloc(2048, GFP_KERNEL);
	if (sbuf == NULL)
		return;
	p = sbuf;

	p += sprintf(p, "  Device FSM state: %s\n",
		     fsm_getstate_str(priv->fsm));
	p += sprintf(p, "  RX channel FSM state: %s\n",
		     fsm_getstate_str(priv->channel[CTCM_READ]->fsm));
	p += sprintf(p, "  TX channel FSM state: %s\n",
		     fsm_getstate_str(priv->channel[CTCM_WRITE]->fsm));
	p += sprintf(p, "  Max. TX buffer used: %ld\n",
		     priv->channel[WRITE]->prof.maxmulti);
	p += sprintf(p, "  Max. chained SKBs: %ld\n",
		     priv->channel[WRITE]->prof.maxcqueue);
	p += sprintf(p, "  TX single write ops: %ld\n",
		     priv->channel[WRITE]->prof.doios_single);
	p += sprintf(p, "  TX multi write ops: %ld\n",
		     priv->channel[WRITE]->prof.doios_multi);
	p += sprintf(p, "  Netto bytes written: %ld\n",
		     priv->channel[WRITE]->prof.txlen);
	p += sprintf(p, "  Max. TX IO-time: %u\n",
		     jiffies_to_usecs(priv->channel[WRITE]->prof.tx_time));

	printk(KERN_INFO "Statistics for %s:\n%s",
				priv->channel[CTCM_WRITE]->netdev->name, sbuf);
	kfree(sbuf);
	return;
}

static ssize_t stats_show(struct device *dev,
			  struct device_attribute *attr, char *buf)
{
	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
	struct ctcm_priv *priv = dev_get_drvdata(dev);

	if (!priv || gdev->state != CCWGROUP_ONLINE)
		return -ENODEV;
	ctcm_print_statistics(priv);
	return sprintf(buf, "0\n");
}

static ssize_t stats_write(struct device *dev, struct device_attribute *attr,
				const char *buf, size_t count)
{
	struct ctcm_priv *priv = dev_get_drvdata(dev);
	if (!priv)
		return -ENODEV;
	/* Reset statistics */
	memset(&priv->channel[WRITE]->prof, 0,
				sizeof(priv->channel[CTCM_WRITE]->prof));
	return count;
}

static ssize_t ctcm_proto_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct ctcm_priv *priv = dev_get_drvdata(dev);
	if (!priv)
		return -ENODEV;

	return sprintf(buf, "%d\n", priv->protocol);
}

static ssize_t ctcm_proto_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	int value, rc;
	struct ctcm_priv *priv = dev_get_drvdata(dev);

	if (!priv)
		return -ENODEV;
	rc = kstrtoint(buf, 0, &value);
	if (rc ||
	    !((value == CTCM_PROTO_S390)  ||
	      (value == CTCM_PROTO_LINUX) ||
	      (value == CTCM_PROTO_MPC) ||
	      (value == CTCM_PROTO_OS390)))
		return -EINVAL;
	priv->protocol = value;
	CTCM_DBF_DEV(SETUP, dev, buf);

	return count;
}

static const char *ctcm_type[] = {
	"not a channel",
	"CTC/A",
	"FICON channel",
	"ESCON channel",
	"unknown channel type",
	"unsupported channel type",
};

static ssize_t ctcm_type_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct ccwgroup_device *cgdev;

	cgdev = to_ccwgroupdev(dev);
	if (!cgdev)
		return -ENODEV;

	return sprintf(buf, "%s\n",
			ctcm_type[cgdev->cdev[0]->id.driver_info]);
}

static DEVICE_ATTR(buffer, 0644, ctcm_buffer_show, ctcm_buffer_write);
static DEVICE_ATTR(protocol, 0644, ctcm_proto_show, ctcm_proto_store);
static DEVICE_ATTR(type, 0444, ctcm_type_show, NULL);
static DEVICE_ATTR(stats, 0644, stats_show, stats_write);

static struct attribute *ctcm_attr[] = {
	&dev_attr_protocol.attr,
	&dev_attr_type.attr,
	&dev_attr_buffer.attr,
	&dev_attr_stats.attr,
	NULL,
};

static struct attribute_group ctcm_attr_group = {
	.attrs = ctcm_attr,
};
const struct attribute_group *ctcm_attr_groups[] = {
	&ctcm_attr_group,
	NULL,
};
Commit	Line	Data
293d984f	1	/*
293d984f PT	2	* Copyright IBM Corp. 2007, 2007
	3	* Authors: Peter Tiedemann (ptiedem@de.ibm.com)
	4	*
	5	*/
	6
	7	#undef DEBUG
	8	#undef DEBUGDATA
	9	#undef DEBUGCCW
	10
2a7c6f2c PT	11	#define KMSG_COMPONENT "ctcm"
	12	#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
	13
20cdffa4	14	#include <linux/device.h>
293d984f	15	#include <linux/sysfs.h>
5a0e3ad6	16	#include <linux/slab.h>
293d984f PT	17	#include "ctcm_main.h"
	18
	19	/*
	20	* sysfs attributes
	21	*/
	22
	23	static ssize_t ctcm_buffer_show(struct device *dev,
	24	struct device_attribute attr, char buf)
	25	{
	26	struct ctcm_priv *priv = dev_get_drvdata(dev);
	27
	28	if (!priv)
	29	return -ENODEV;
	30	return sprintf(buf, "%d\n", priv->buffer_size);
	31	}
	32
	33	static ssize_t ctcm_buffer_write(struct device *dev,
	34	struct device_attribute attr, const char buf, size_t count)
	35	{
	36	struct net_device *ndev;
a68be015	37	unsigned int bs1;
293d984f	38	struct ctcm_priv *priv = dev_get_drvdata(dev);
a68be015	39	int rc;
293d984f	40
3c09e264 UB	41	ndev = priv->channel[CTCM_READ]->netdev;
3c09e264 UB	42	if (!(priv && priv->channel[CTCM_READ] && ndev)) {
293d984f PT	43	CTCM_DBF_TEXT(SETUP, CTC_DBF_ERROR, "bfnondev");
	44	return -ENODEV;
	45	}
	46
652d77ba TR	47	rc = kstrtouint(buf, 0, &bs1);
652d77ba TR	48	if (rc)
a68be015	49	goto einval;
293d984f PT	50	if (bs1 > CTCM_BUFSIZE_LIMIT)
	51	goto einval;
	52	if (bs1 < (576 + LL_HEADER_LENGTH + 2))
	53	goto einval;
	54	priv->buffer_size = bs1; /* just to overwrite the default */
	55
	56	if ((ndev->flags & IFF_RUNNING) &&
	57	(bs1 < (ndev->mtu + LL_HEADER_LENGTH + 2)))
	58	goto einval;
	59
3c09e264 UB	60	priv->channel[CTCM_READ]->max_bufsize = bs1;
3c09e264 UB	61	priv->channel[CTCM_WRITE]->max_bufsize = bs1;
293d984f PT	62	if (!(ndev->flags & IFF_RUNNING))
293d984f PT	63	ndev->mtu = bs1 - LL_HEADER_LENGTH - 2;
3c09e264 UB	64	priv->channel[CTCM_READ]->flags \|= CHANNEL_FLAGS_BUFSIZE_CHANGED;
3c09e264 UB	65	priv->channel[CTCM_WRITE]->flags \|= CHANNEL_FLAGS_BUFSIZE_CHANGED;
293d984f PT	66
	67	CTCM_DBF_DEV(SETUP, ndev, buf);
	68	return count;
	69
	70	einval:
	71	CTCM_DBF_DEV(SETUP, ndev, "buff_err");
	72	return -EINVAL;
	73	}
	74
	75	static void ctcm_print_statistics(struct ctcm_priv *priv)
	76	{
	77	char *sbuf;
	78	char *p;
	79
	80	if (!priv)
	81	return;
	82	sbuf = kmalloc(2048, GFP_KERNEL);
	83	if (sbuf == NULL)
	84	return;
	85	p = sbuf;
	86
	87	p += sprintf(p, " Device FSM state: %s\n",
	88	fsm_getstate_str(priv->fsm));
	89	p += sprintf(p, " RX channel FSM state: %s\n",
3c09e264	90	fsm_getstate_str(priv->channel[CTCM_READ]->fsm));
293d984f	91	p += sprintf(p, " TX channel FSM state: %s\n",
3c09e264	92	fsm_getstate_str(priv->channel[CTCM_WRITE]->fsm));
293d984f PT	93	p += sprintf(p, " Max. TX buffer used: %ld\n",
	94	priv->channel[WRITE]->prof.maxmulti);
	95	p += sprintf(p, " Max. chained SKBs: %ld\n",
	96	priv->channel[WRITE]->prof.maxcqueue);
	97	p += sprintf(p, " TX single write ops: %ld\n",
	98	priv->channel[WRITE]->prof.doios_single);
	99	p += sprintf(p, " TX multi write ops: %ld\n",
	100	priv->channel[WRITE]->prof.doios_multi);
	101	p += sprintf(p, " Netto bytes written: %ld\n",
	102	priv->channel[WRITE]->prof.txlen);
ee6edb97 AM	103	p += sprintf(p, " Max. TX IO-time: %u\n",
ee6edb97 AM	104	jiffies_to_usecs(priv->channel[WRITE]->prof.tx_time));
293d984f PT	105
293d984f PT	106	printk(KERN_INFO "Statistics for %s:\n%s",
3c09e264	107	priv->channel[CTCM_WRITE]->netdev->name, sbuf);
293d984f PT	108	kfree(sbuf);
	109	return;
	110	}
	111
	112	static ssize_t stats_show(struct device *dev,
20cdffa4	113	struct device_attribute attr, char buf)
293d984f	114	{
20cdffa4	115	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
293d984f	116	struct ctcm_priv *priv = dev_get_drvdata(dev);
20cdffa4 SO	117
20cdffa4 SO	118	if (!priv \|\| gdev->state != CCWGROUP_ONLINE)
293d984f PT	119	return -ENODEV;
	120	ctcm_print_statistics(priv);
	121	return sprintf(buf, "0\n");
	122	}
	123
	124	static ssize_t stats_write(struct device dev, struct device_attribute attr,
	125	const char *buf, size_t count)
	126	{
	127	struct ctcm_priv *priv = dev_get_drvdata(dev);
	128	if (!priv)
	129	return -ENODEV;
	130	/* Reset statistics */
	131	memset(&priv->channel[WRITE]->prof, 0,
3c09e264	132	sizeof(priv->channel[CTCM_WRITE]->prof));
293d984f PT	133	return count;
	134	}
	135
	136	static ssize_t ctcm_proto_show(struct device *dev,
	137	struct device_attribute attr, char buf)
	138	{
	139	struct ctcm_priv *priv = dev_get_drvdata(dev);
	140	if (!priv)
	141	return -ENODEV;
	142
	143	return sprintf(buf, "%d\n", priv->protocol);
	144	}
	145
	146	static ssize_t ctcm_proto_store(struct device *dev,
	147	struct device_attribute attr, const char buf, size_t count)
	148	{
a68be015	149	int value, rc;
293d984f PT	150	struct ctcm_priv *priv = dev_get_drvdata(dev);
	151
	152	if (!priv)
	153	return -ENODEV;
652d77ba TR	154	rc = kstrtoint(buf, 0, &value);
652d77ba TR	155	if (rc \|\|
a68be015	156	!((value == CTCM_PROTO_S390) \|\|
293d984f PT	157	(value == CTCM_PROTO_LINUX) \|\|
	158	(value == CTCM_PROTO_MPC) \|\|
	159	(value == CTCM_PROTO_OS390)))
	160	return -EINVAL;
	161	priv->protocol = value;
	162	CTCM_DBF_DEV(SETUP, dev, buf);
	163
	164	return count;
	165	}
	166
c4736d96	167	static const char *ctcm_type[] = {
0ca8cc6f UB	168	"not a channel",
	169	"CTC/A",
	170	"FICON channel",
	171	"ESCON channel",
	172	"unknown channel type",
	173	"unsupported channel type",
	174	};
	175
293d984f PT	176	static ssize_t ctcm_type_show(struct device *dev,
	177	struct device_attribute attr, char buf)
	178	{
	179	struct ccwgroup_device *cgdev;
	180
	181	cgdev = to_ccwgroupdev(dev);
	182	if (!cgdev)
	183	return -ENODEV;
	184
	185	return sprintf(buf, "%s\n",
0ca8cc6f	186	ctcm_type[cgdev->cdev[0]->id.driver_info]);
293d984f PT	187	}
	188
	189	static DEVICE_ATTR(buffer, 0644, ctcm_buffer_show, ctcm_buffer_write);
	190	static DEVICE_ATTR(protocol, 0644, ctcm_proto_show, ctcm_proto_store);
	191	static DEVICE_ATTR(type, 0444, ctcm_type_show, NULL);
	192	static DEVICE_ATTR(stats, 0644, stats_show, stats_write);
	193
	194	static struct attribute *ctcm_attr[] = {
	195	&dev_attr_protocol.attr,
	196	&dev_attr_type.attr,
	197	&dev_attr_buffer.attr,
20cdffa4	198	&dev_attr_stats.attr,
293d984f PT	199	NULL,
	200	};
	201
	202	static struct attribute_group ctcm_attr_group = {
	203	.attrs = ctcm_attr,
	204	};
20cdffa4 SO	205	const struct attribute_group *ctcm_attr_groups[] = {
	206	&ctcm_attr_group,
	207	NULL,
	208	};