blob: 8305319b2a846c31328f5b773e8e0177cf6d41d0 [file] [log] [blame]
Peter Tiedemann293d9842008-02-08 00:03:49 +01001/*
2 * drivers/s390/net/ctcm_sysfs.c
3 *
4 * Copyright IBM Corp. 2007, 2007
5 * Authors: Peter Tiedemann (ptiedem@de.ibm.com)
6 *
7 */
8
9#undef DEBUG
10#undef DEBUGDATA
11#undef DEBUGCCW
12
Peter Tiedemann2a7c6f22008-12-25 13:39:54 +010013#define KMSG_COMPONENT "ctcm"
14#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
15
Peter Tiedemann293d9842008-02-08 00:03:49 +010016#include <linux/sysfs.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090017#include <linux/slab.h>
Peter Tiedemann293d9842008-02-08 00:03:49 +010018#include "ctcm_main.h"
19
20/*
21 * sysfs attributes
22 */
23
24static 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
34static 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;
38 int bs1;
39 struct ctcm_priv *priv = dev_get_drvdata(dev);
40
Ursula Braun3c09e262010-08-12 01:58:28 +000041 ndev = priv->channel[CTCM_READ]->netdev;
42 if (!(priv && priv->channel[CTCM_READ] && ndev)) {
Peter Tiedemann293d9842008-02-08 00:03:49 +010043 CTCM_DBF_TEXT(SETUP, CTC_DBF_ERROR, "bfnondev");
44 return -ENODEV;
45 }
46
47 sscanf(buf, "%u", &bs1);
48 if (bs1 > CTCM_BUFSIZE_LIMIT)
49 goto einval;
50 if (bs1 < (576 + LL_HEADER_LENGTH + 2))
51 goto einval;
52 priv->buffer_size = bs1; /* just to overwrite the default */
53
54 if ((ndev->flags & IFF_RUNNING) &&
55 (bs1 < (ndev->mtu + LL_HEADER_LENGTH + 2)))
56 goto einval;
57
Ursula Braun3c09e262010-08-12 01:58:28 +000058 priv->channel[CTCM_READ]->max_bufsize = bs1;
59 priv->channel[CTCM_WRITE]->max_bufsize = bs1;
Peter Tiedemann293d9842008-02-08 00:03:49 +010060 if (!(ndev->flags & IFF_RUNNING))
61 ndev->mtu = bs1 - LL_HEADER_LENGTH - 2;
Ursula Braun3c09e262010-08-12 01:58:28 +000062 priv->channel[CTCM_READ]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
63 priv->channel[CTCM_WRITE]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
Peter Tiedemann293d9842008-02-08 00:03:49 +010064
65 CTCM_DBF_DEV(SETUP, ndev, buf);
66 return count;
67
68einval:
69 CTCM_DBF_DEV(SETUP, ndev, "buff_err");
70 return -EINVAL;
71}
72
73static void ctcm_print_statistics(struct ctcm_priv *priv)
74{
75 char *sbuf;
76 char *p;
77
78 if (!priv)
79 return;
80 sbuf = kmalloc(2048, GFP_KERNEL);
81 if (sbuf == NULL)
82 return;
83 p = sbuf;
84
85 p += sprintf(p, " Device FSM state: %s\n",
86 fsm_getstate_str(priv->fsm));
87 p += sprintf(p, " RX channel FSM state: %s\n",
Ursula Braun3c09e262010-08-12 01:58:28 +000088 fsm_getstate_str(priv->channel[CTCM_READ]->fsm));
Peter Tiedemann293d9842008-02-08 00:03:49 +010089 p += sprintf(p, " TX channel FSM state: %s\n",
Ursula Braun3c09e262010-08-12 01:58:28 +000090 fsm_getstate_str(priv->channel[CTCM_WRITE]->fsm));
Peter Tiedemann293d9842008-02-08 00:03:49 +010091 p += sprintf(p, " Max. TX buffer used: %ld\n",
92 priv->channel[WRITE]->prof.maxmulti);
93 p += sprintf(p, " Max. chained SKBs: %ld\n",
94 priv->channel[WRITE]->prof.maxcqueue);
95 p += sprintf(p, " TX single write ops: %ld\n",
96 priv->channel[WRITE]->prof.doios_single);
97 p += sprintf(p, " TX multi write ops: %ld\n",
98 priv->channel[WRITE]->prof.doios_multi);
99 p += sprintf(p, " Netto bytes written: %ld\n",
100 priv->channel[WRITE]->prof.txlen);
101 p += sprintf(p, " Max. TX IO-time: %ld\n",
102 priv->channel[WRITE]->prof.tx_time);
103
104 printk(KERN_INFO "Statistics for %s:\n%s",
Ursula Braun3c09e262010-08-12 01:58:28 +0000105 priv->channel[CTCM_WRITE]->netdev->name, sbuf);
Peter Tiedemann293d9842008-02-08 00:03:49 +0100106 kfree(sbuf);
107 return;
108}
109
110static ssize_t stats_show(struct device *dev,
111 struct device_attribute *attr, char *buf)
112{
113 struct ctcm_priv *priv = dev_get_drvdata(dev);
114 if (!priv)
115 return -ENODEV;
116 ctcm_print_statistics(priv);
117 return sprintf(buf, "0\n");
118}
119
120static ssize_t stats_write(struct device *dev, struct device_attribute *attr,
121 const char *buf, size_t count)
122{
123 struct ctcm_priv *priv = dev_get_drvdata(dev);
124 if (!priv)
125 return -ENODEV;
126 /* Reset statistics */
127 memset(&priv->channel[WRITE]->prof, 0,
Ursula Braun3c09e262010-08-12 01:58:28 +0000128 sizeof(priv->channel[CTCM_WRITE]->prof));
Peter Tiedemann293d9842008-02-08 00:03:49 +0100129 return count;
130}
131
132static ssize_t ctcm_proto_show(struct device *dev,
133 struct device_attribute *attr, char *buf)
134{
135 struct ctcm_priv *priv = dev_get_drvdata(dev);
136 if (!priv)
137 return -ENODEV;
138
139 return sprintf(buf, "%d\n", priv->protocol);
140}
141
142static ssize_t ctcm_proto_store(struct device *dev,
143 struct device_attribute *attr, const char *buf, size_t count)
144{
145 int value;
146 struct ctcm_priv *priv = dev_get_drvdata(dev);
147
148 if (!priv)
149 return -ENODEV;
150 sscanf(buf, "%u", &value);
151 if (!((value == CTCM_PROTO_S390) ||
152 (value == CTCM_PROTO_LINUX) ||
153 (value == CTCM_PROTO_MPC) ||
154 (value == CTCM_PROTO_OS390)))
155 return -EINVAL;
156 priv->protocol = value;
157 CTCM_DBF_DEV(SETUP, dev, buf);
158
159 return count;
160}
161
Ursula Braun0ca8cc62009-11-12 21:46:29 +0000162const char *ctcm_type[] = {
163 "not a channel",
164 "CTC/A",
165 "FICON channel",
166 "ESCON channel",
167 "unknown channel type",
168 "unsupported channel type",
169};
170
Peter Tiedemann293d9842008-02-08 00:03:49 +0100171static ssize_t ctcm_type_show(struct device *dev,
172 struct device_attribute *attr, char *buf)
173{
174 struct ccwgroup_device *cgdev;
175
176 cgdev = to_ccwgroupdev(dev);
177 if (!cgdev)
178 return -ENODEV;
179
180 return sprintf(buf, "%s\n",
Ursula Braun0ca8cc62009-11-12 21:46:29 +0000181 ctcm_type[cgdev->cdev[0]->id.driver_info]);
Peter Tiedemann293d9842008-02-08 00:03:49 +0100182}
183
184static DEVICE_ATTR(buffer, 0644, ctcm_buffer_show, ctcm_buffer_write);
185static DEVICE_ATTR(protocol, 0644, ctcm_proto_show, ctcm_proto_store);
186static DEVICE_ATTR(type, 0444, ctcm_type_show, NULL);
187static DEVICE_ATTR(stats, 0644, stats_show, stats_write);
188
189static struct attribute *ctcm_attr[] = {
190 &dev_attr_protocol.attr,
191 &dev_attr_type.attr,
192 &dev_attr_buffer.attr,
193 NULL,
194};
195
196static struct attribute_group ctcm_attr_group = {
197 .attrs = ctcm_attr,
198};
199
200int ctcm_add_attributes(struct device *dev)
201{
202 int rc;
203
204 rc = device_create_file(dev, &dev_attr_stats);
205
206 return rc;
207}
208
209void ctcm_remove_attributes(struct device *dev)
210{
211 device_remove_file(dev, &dev_attr_stats);
212}
213
214int ctcm_add_files(struct device *dev)
215{
216 return sysfs_create_group(&dev->kobj, &ctcm_attr_group);
217}
218
219void ctcm_remove_files(struct device *dev)
220{
221 sysfs_remove_group(&dev->kobj, &ctcm_attr_group);
222}
223