[linux-2.6-block.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;
	int bs1;
	struct ctcm_priv *priv = dev_get_drvdata(dev);

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

	sscanf(buf, "%u", &bs1);
	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: %ld\n",
		     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;
	struct ctcm_priv *priv = dev_get_drvdata(dev);

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