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path: root/drivers/s390/net/ctcm_sysfs.c
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Diffstat (limited to 'drivers/s390/net/ctcm_sysfs.c')
-rw-r--r--drivers/s390/net/ctcm_sysfs.c210
1 files changed, 210 insertions, 0 deletions
diff --git a/drivers/s390/net/ctcm_sysfs.c b/drivers/s390/net/ctcm_sysfs.c
new file mode 100644
index 000000000000..bb2d13721d34
--- /dev/null
+++ b/drivers/s390/net/ctcm_sysfs.c
@@ -0,0 +1,210 @@
1/*
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
13#include <linux/sysfs.h>
14#include "ctcm_main.h"
15
16/*
17 * sysfs attributes
18 */
19
20static ssize_t ctcm_buffer_show(struct device *dev,
21 struct device_attribute *attr, char *buf)
22{
23 struct ctcm_priv *priv = dev_get_drvdata(dev);
24
25 if (!priv)
26 return -ENODEV;
27 return sprintf(buf, "%d\n", priv->buffer_size);
28}
29
30static ssize_t ctcm_buffer_write(struct device *dev,
31 struct device_attribute *attr, const char *buf, size_t count)
32{
33 struct net_device *ndev;
34 int bs1;
35 struct ctcm_priv *priv = dev_get_drvdata(dev);
36
37 if (!(priv && priv->channel[READ] &&
38 (ndev = priv->channel[READ]->netdev))) {
39 CTCM_DBF_TEXT(SETUP, CTC_DBF_ERROR, "bfnondev");
40 return -ENODEV;
41 }
42
43 sscanf(buf, "%u", &bs1);
44 if (bs1 > CTCM_BUFSIZE_LIMIT)
45 goto einval;
46 if (bs1 < (576 + LL_HEADER_LENGTH + 2))
47 goto einval;
48 priv->buffer_size = bs1; /* just to overwrite the default */
49
50 if ((ndev->flags & IFF_RUNNING) &&
51 (bs1 < (ndev->mtu + LL_HEADER_LENGTH + 2)))
52 goto einval;
53
54 priv->channel[READ]->max_bufsize = bs1;
55 priv->channel[WRITE]->max_bufsize = bs1;
56 if (!(ndev->flags & IFF_RUNNING))
57 ndev->mtu = bs1 - LL_HEADER_LENGTH - 2;
58 priv->channel[READ]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
59 priv->channel[WRITE]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
60
61 CTCM_DBF_DEV(SETUP, ndev, buf);
62 return count;
63
64einval:
65 CTCM_DBF_DEV(SETUP, ndev, "buff_err");
66 return -EINVAL;
67}
68
69static void ctcm_print_statistics(struct ctcm_priv *priv)
70{
71 char *sbuf;
72 char *p;
73
74 if (!priv)
75 return;
76 sbuf = kmalloc(2048, GFP_KERNEL);
77 if (sbuf == NULL)
78 return;
79 p = sbuf;
80
81 p += sprintf(p, " Device FSM state: %s\n",
82 fsm_getstate_str(priv->fsm));
83 p += sprintf(p, " RX channel FSM state: %s\n",
84 fsm_getstate_str(priv->channel[READ]->fsm));
85 p += sprintf(p, " TX channel FSM state: %s\n",
86 fsm_getstate_str(priv->channel[WRITE]->fsm));
87 p += sprintf(p, " Max. TX buffer used: %ld\n",
88 priv->channel[WRITE]->prof.maxmulti);
89 p += sprintf(p, " Max. chained SKBs: %ld\n",
90 priv->channel[WRITE]->prof.maxcqueue);
91 p += sprintf(p, " TX single write ops: %ld\n",
92 priv->channel[WRITE]->prof.doios_single);
93 p += sprintf(p, " TX multi write ops: %ld\n",
94 priv->channel[WRITE]->prof.doios_multi);
95 p += sprintf(p, " Netto bytes written: %ld\n",
96 priv->channel[WRITE]->prof.txlen);
97 p += sprintf(p, " Max. TX IO-time: %ld\n",
98 priv->channel[WRITE]->prof.tx_time);
99
100 printk(KERN_INFO "Statistics for %s:\n%s",
101 priv->channel[WRITE]->netdev->name, sbuf);
102 kfree(sbuf);
103 return;
104}
105
106static ssize_t stats_show(struct device *dev,
107 struct device_attribute *attr, char *buf)
108{
109 struct ctcm_priv *priv = dev_get_drvdata(dev);
110 if (!priv)
111 return -ENODEV;
112 ctcm_print_statistics(priv);
113 return sprintf(buf, "0\n");
114}
115
116static ssize_t stats_write(struct device *dev, struct device_attribute *attr,
117 const char *buf, size_t count)
118{
119 struct ctcm_priv *priv = dev_get_drvdata(dev);
120 if (!priv)
121 return -ENODEV;
122 /* Reset statistics */
123 memset(&priv->channel[WRITE]->prof, 0,
124 sizeof(priv->channel[WRITE]->prof));
125 return count;
126}
127
128static ssize_t ctcm_proto_show(struct device *dev,
129 struct device_attribute *attr, char *buf)
130{
131 struct ctcm_priv *priv = dev_get_drvdata(dev);
132 if (!priv)
133 return -ENODEV;
134
135 return sprintf(buf, "%d\n", priv->protocol);
136}
137
138static ssize_t ctcm_proto_store(struct device *dev,
139 struct device_attribute *attr, const char *buf, size_t count)
140{
141 int value;
142 struct ctcm_priv *priv = dev_get_drvdata(dev);
143
144 if (!priv)
145 return -ENODEV;
146 sscanf(buf, "%u", &value);
147 if (!((value == CTCM_PROTO_S390) ||
148 (value == CTCM_PROTO_LINUX) ||
149 (value == CTCM_PROTO_MPC) ||
150 (value == CTCM_PROTO_OS390)))
151 return -EINVAL;
152 priv->protocol = value;
153 CTCM_DBF_DEV(SETUP, dev, buf);
154
155 return count;
156}
157
158static ssize_t ctcm_type_show(struct device *dev,
159 struct device_attribute *attr, char *buf)
160{
161 struct ccwgroup_device *cgdev;
162
163 cgdev = to_ccwgroupdev(dev);
164 if (!cgdev)
165 return -ENODEV;
166
167 return sprintf(buf, "%s\n",
168 cu3088_type[cgdev->cdev[0]->id.driver_info]);
169}
170
171static DEVICE_ATTR(buffer, 0644, ctcm_buffer_show, ctcm_buffer_write);
172static DEVICE_ATTR(protocol, 0644, ctcm_proto_show, ctcm_proto_store);
173static DEVICE_ATTR(type, 0444, ctcm_type_show, NULL);
174static DEVICE_ATTR(stats, 0644, stats_show, stats_write);
175
176static struct attribute *ctcm_attr[] = {
177 &dev_attr_protocol.attr,
178 &dev_attr_type.attr,
179 &dev_attr_buffer.attr,
180 NULL,
181};
182
183static struct attribute_group ctcm_attr_group = {
184 .attrs = ctcm_attr,
185};
186
187int ctcm_add_attributes(struct device *dev)
188{
189 int rc;
190
191 rc = device_create_file(dev, &dev_attr_stats);
192
193 return rc;
194}
195
196void ctcm_remove_attributes(struct device *dev)
197{
198 device_remove_file(dev, &dev_attr_stats);
199}
200
201int ctcm_add_files(struct device *dev)
202{
203 return sysfs_create_group(&dev->kobj, &ctcm_attr_group);
204}
205
206void ctcm_remove_files(struct device *dev)
207{
208 sysfs_remove_group(&dev->kobj, &ctcm_attr_group);
209}
210
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