summaryrefslogtreecommitdiffstats
path: root/drivers/s390/net/ctcm_sysfs.c
blob: 0c27ae726475cb253dd3dee10ec73ad91873017d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
/*
 * 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,
};