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

// SPDX-License-Identifier: GPL-2.0
/*
 * 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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
293d984f	2	/*
293d984f PT	3	* Copyright IBM Corp. 2007, 2007
	4	* Authors: Peter Tiedemann (ptiedem@de.ibm.com)
	5	*
	6	*/
	7
	8	#undef DEBUG
	9	#undef DEBUGDATA
	10	#undef DEBUGCCW
	11
2a7c6f2c PT	12	#define KMSG_COMPONENT "ctcm"
	13	#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
	14
20cdffa4	15	#include <linux/device.h>
293d984f	16	#include <linux/sysfs.h>
5a0e3ad6	17	#include <linux/slab.h>
293d984f PT	18	#include "ctcm_main.h"
	19
	20	/*
	21	* sysfs attributes
	22	*/
	23
	24	static ssize_t ctcm_buffer_show(struct device *dev,
	25	struct device_attribute attr, char buf)
	26	{
	27	struct ctcm_priv *priv = dev_get_drvdata(dev);
	28
	29	if (!priv)
	30	return -ENODEV;
	31	return sprintf(buf, "%d\n", priv->buffer_size);
	32	}
	33
	34	static ssize_t ctcm_buffer_write(struct device *dev,
	35	struct device_attribute attr, const char buf, size_t count)
	36	{
	37	struct net_device *ndev;
a68be015	38	unsigned int bs1;
293d984f	39	struct ctcm_priv *priv = dev_get_drvdata(dev);
a68be015	40	int rc;
293d984f	41
3c09e264 UB	42	ndev = priv->channel[CTCM_READ]->netdev;
3c09e264 UB	43	if (!(priv && priv->channel[CTCM_READ] && ndev)) {
293d984f PT	44	CTCM_DBF_TEXT(SETUP, CTC_DBF_ERROR, "bfnondev");
	45	return -ENODEV;
	46	}
	47
652d77ba TR	48	rc = kstrtouint(buf, 0, &bs1);
652d77ba TR	49	if (rc)
a68be015	50	goto einval;
293d984f PT	51	if (bs1 > CTCM_BUFSIZE_LIMIT)
	52	goto einval;
	53	if (bs1 < (576 + LL_HEADER_LENGTH + 2))
	54	goto einval;
	55	priv->buffer_size = bs1; /* just to overwrite the default */
	56
	57	if ((ndev->flags & IFF_RUNNING) &&
	58	(bs1 < (ndev->mtu + LL_HEADER_LENGTH + 2)))
	59	goto einval;
	60
3c09e264 UB	61	priv->channel[CTCM_READ]->max_bufsize = bs1;
3c09e264 UB	62	priv->channel[CTCM_WRITE]->max_bufsize = bs1;
293d984f PT	63	if (!(ndev->flags & IFF_RUNNING))
293d984f PT	64	ndev->mtu = bs1 - LL_HEADER_LENGTH - 2;
3c09e264 UB	65	priv->channel[CTCM_READ]->flags \|= CHANNEL_FLAGS_BUFSIZE_CHANGED;
3c09e264 UB	66	priv->channel[CTCM_WRITE]->flags \|= CHANNEL_FLAGS_BUFSIZE_CHANGED;
293d984f PT	67
	68	CTCM_DBF_DEV(SETUP, ndev, buf);
	69	return count;
	70
	71	einval:
	72	CTCM_DBF_DEV(SETUP, ndev, "buff_err");
	73	return -EINVAL;
	74	}
	75
	76	static void ctcm_print_statistics(struct ctcm_priv *priv)
	77	{
	78	char *sbuf;
	79	char *p;
	80
	81	if (!priv)
	82	return;
	83	sbuf = kmalloc(2048, GFP_KERNEL);
	84	if (sbuf == NULL)
	85	return;
	86	p = sbuf;
	87
	88	p += sprintf(p, " Device FSM state: %s\n",
	89	fsm_getstate_str(priv->fsm));
	90	p += sprintf(p, " RX channel FSM state: %s\n",
3c09e264	91	fsm_getstate_str(priv->channel[CTCM_READ]->fsm));
293d984f	92	p += sprintf(p, " TX channel FSM state: %s\n",
3c09e264	93	fsm_getstate_str(priv->channel[CTCM_WRITE]->fsm));
293d984f PT	94	p += sprintf(p, " Max. TX buffer used: %ld\n",
	95	priv->channel[WRITE]->prof.maxmulti);
	96	p += sprintf(p, " Max. chained SKBs: %ld\n",
	97	priv->channel[WRITE]->prof.maxcqueue);
	98	p += sprintf(p, " TX single write ops: %ld\n",
	99	priv->channel[WRITE]->prof.doios_single);
	100	p += sprintf(p, " TX multi write ops: %ld\n",
	101	priv->channel[WRITE]->prof.doios_multi);
	102	p += sprintf(p, " Netto bytes written: %ld\n",
	103	priv->channel[WRITE]->prof.txlen);
ee6edb97 AM	104	p += sprintf(p, " Max. TX IO-time: %u\n",
ee6edb97 AM	105	jiffies_to_usecs(priv->channel[WRITE]->prof.tx_time));
293d984f PT	106
293d984f PT	107	printk(KERN_INFO "Statistics for %s:\n%s",
3c09e264	108	priv->channel[CTCM_WRITE]->netdev->name, sbuf);
293d984f PT	109	kfree(sbuf);
	110	return;
	111	}
	112
	113	static ssize_t stats_show(struct device *dev,
20cdffa4	114	struct device_attribute attr, char buf)
293d984f	115	{
20cdffa4	116	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
293d984f	117	struct ctcm_priv *priv = dev_get_drvdata(dev);
20cdffa4 SO	118
20cdffa4 SO	119	if (!priv \|\| gdev->state != CCWGROUP_ONLINE)
293d984f PT	120	return -ENODEV;
	121	ctcm_print_statistics(priv);
	122	return sprintf(buf, "0\n");
	123	}
	124
	125	static ssize_t stats_write(struct device dev, struct device_attribute attr,
	126	const char *buf, size_t count)
	127	{
	128	struct ctcm_priv *priv = dev_get_drvdata(dev);
	129	if (!priv)
	130	return -ENODEV;
	131	/* Reset statistics */
	132	memset(&priv->channel[WRITE]->prof, 0,
3c09e264	133	sizeof(priv->channel[CTCM_WRITE]->prof));
293d984f PT	134	return count;
	135	}
	136
	137	static ssize_t ctcm_proto_show(struct device *dev,
	138	struct device_attribute attr, char buf)
	139	{
	140	struct ctcm_priv *priv = dev_get_drvdata(dev);
	141	if (!priv)
	142	return -ENODEV;
	143
	144	return sprintf(buf, "%d\n", priv->protocol);
	145	}
	146
	147	static ssize_t ctcm_proto_store(struct device *dev,
	148	struct device_attribute attr, const char buf, size_t count)
	149	{
a68be015	150	int value, rc;
293d984f PT	151	struct ctcm_priv *priv = dev_get_drvdata(dev);
	152
	153	if (!priv)
	154	return -ENODEV;
652d77ba TR	155	rc = kstrtoint(buf, 0, &value);
652d77ba TR	156	if (rc \|\|
a68be015	157	!((value == CTCM_PROTO_S390) \|\|
293d984f PT	158	(value == CTCM_PROTO_LINUX) \|\|
	159	(value == CTCM_PROTO_MPC) \|\|
	160	(value == CTCM_PROTO_OS390)))
	161	return -EINVAL;
	162	priv->protocol = value;
	163	CTCM_DBF_DEV(SETUP, dev, buf);
	164
	165	return count;
	166	}
	167
c4736d96	168	static const char *ctcm_type[] = {
0ca8cc6f UB	169	"not a channel",
	170	"CTC/A",
	171	"FICON channel",
	172	"ESCON channel",
	173	"unknown channel type",
	174	"unsupported channel type",
	175	};
	176
293d984f PT	177	static ssize_t ctcm_type_show(struct device *dev,
	178	struct device_attribute attr, char buf)
	179	{
	180	struct ccwgroup_device *cgdev;
	181
	182	cgdev = to_ccwgroupdev(dev);
	183	if (!cgdev)
	184	return -ENODEV;
	185
	186	return sprintf(buf, "%s\n",
0ca8cc6f	187	ctcm_type[cgdev->cdev[0]->id.driver_info]);
293d984f PT	188	}
	189
	190	static DEVICE_ATTR(buffer, 0644, ctcm_buffer_show, ctcm_buffer_write);
	191	static DEVICE_ATTR(protocol, 0644, ctcm_proto_show, ctcm_proto_store);
	192	static DEVICE_ATTR(type, 0444, ctcm_type_show, NULL);
	193	static DEVICE_ATTR(stats, 0644, stats_show, stats_write);
	194
	195	static struct attribute *ctcm_attr[] = {
	196	&dev_attr_protocol.attr,
	197	&dev_attr_type.attr,
	198	&dev_attr_buffer.attr,
20cdffa4	199	&dev_attr_stats.attr,
293d984f PT	200	NULL,
	201	};
	202
	203	static struct attribute_group ctcm_attr_group = {
	204	.attrs = ctcm_attr,
	205	};
20cdffa4 SO	206	const struct attribute_group *ctcm_attr_groups[] = {
	207	&ctcm_attr_group,
	208	NULL,
	209	};