![Heiko Carstens](/assets/img/avatar_default.png)
Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
205 lines
5 KiB
C
205 lines
5 KiB
C
/*
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* Copyright IBM Corp. 2007, 2007
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* Authors: Peter Tiedemann (ptiedem@de.ibm.com)
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*
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*/
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#undef DEBUG
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#undef DEBUGDATA
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#undef DEBUGCCW
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#define KMSG_COMPONENT "ctcm"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/device.h>
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#include <linux/sysfs.h>
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#include <linux/slab.h>
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#include "ctcm_main.h"
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/*
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* sysfs attributes
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*/
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static ssize_t ctcm_buffer_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct ctcm_priv *priv = dev_get_drvdata(dev);
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if (!priv)
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return -ENODEV;
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return sprintf(buf, "%d\n", priv->buffer_size);
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}
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static ssize_t ctcm_buffer_write(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t count)
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{
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struct net_device *ndev;
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int bs1;
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struct ctcm_priv *priv = dev_get_drvdata(dev);
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ndev = priv->channel[CTCM_READ]->netdev;
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if (!(priv && priv->channel[CTCM_READ] && ndev)) {
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CTCM_DBF_TEXT(SETUP, CTC_DBF_ERROR, "bfnondev");
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return -ENODEV;
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}
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sscanf(buf, "%u", &bs1);
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if (bs1 > CTCM_BUFSIZE_LIMIT)
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goto einval;
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if (bs1 < (576 + LL_HEADER_LENGTH + 2))
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goto einval;
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priv->buffer_size = bs1; /* just to overwrite the default */
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if ((ndev->flags & IFF_RUNNING) &&
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(bs1 < (ndev->mtu + LL_HEADER_LENGTH + 2)))
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goto einval;
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priv->channel[CTCM_READ]->max_bufsize = bs1;
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priv->channel[CTCM_WRITE]->max_bufsize = bs1;
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if (!(ndev->flags & IFF_RUNNING))
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ndev->mtu = bs1 - LL_HEADER_LENGTH - 2;
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priv->channel[CTCM_READ]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
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priv->channel[CTCM_WRITE]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
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CTCM_DBF_DEV(SETUP, ndev, buf);
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return count;
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einval:
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CTCM_DBF_DEV(SETUP, ndev, "buff_err");
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return -EINVAL;
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}
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static void ctcm_print_statistics(struct ctcm_priv *priv)
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{
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char *sbuf;
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char *p;
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if (!priv)
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return;
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sbuf = kmalloc(2048, GFP_KERNEL);
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if (sbuf == NULL)
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return;
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p = sbuf;
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p += sprintf(p, " Device FSM state: %s\n",
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fsm_getstate_str(priv->fsm));
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p += sprintf(p, " RX channel FSM state: %s\n",
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fsm_getstate_str(priv->channel[CTCM_READ]->fsm));
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p += sprintf(p, " TX channel FSM state: %s\n",
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fsm_getstate_str(priv->channel[CTCM_WRITE]->fsm));
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p += sprintf(p, " Max. TX buffer used: %ld\n",
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priv->channel[WRITE]->prof.maxmulti);
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p += sprintf(p, " Max. chained SKBs: %ld\n",
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priv->channel[WRITE]->prof.maxcqueue);
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p += sprintf(p, " TX single write ops: %ld\n",
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priv->channel[WRITE]->prof.doios_single);
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p += sprintf(p, " TX multi write ops: %ld\n",
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priv->channel[WRITE]->prof.doios_multi);
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p += sprintf(p, " Netto bytes written: %ld\n",
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priv->channel[WRITE]->prof.txlen);
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p += sprintf(p, " Max. TX IO-time: %ld\n",
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priv->channel[WRITE]->prof.tx_time);
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printk(KERN_INFO "Statistics for %s:\n%s",
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priv->channel[CTCM_WRITE]->netdev->name, sbuf);
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kfree(sbuf);
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return;
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}
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static ssize_t stats_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
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struct ctcm_priv *priv = dev_get_drvdata(dev);
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if (!priv || gdev->state != CCWGROUP_ONLINE)
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return -ENODEV;
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ctcm_print_statistics(priv);
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return sprintf(buf, "0\n");
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}
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static ssize_t stats_write(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct ctcm_priv *priv = dev_get_drvdata(dev);
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if (!priv)
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return -ENODEV;
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/* Reset statistics */
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memset(&priv->channel[WRITE]->prof, 0,
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sizeof(priv->channel[CTCM_WRITE]->prof));
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return count;
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}
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static ssize_t ctcm_proto_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct ctcm_priv *priv = dev_get_drvdata(dev);
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if (!priv)
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return -ENODEV;
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return sprintf(buf, "%d\n", priv->protocol);
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}
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static ssize_t ctcm_proto_store(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t count)
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{
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int value;
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struct ctcm_priv *priv = dev_get_drvdata(dev);
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if (!priv)
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return -ENODEV;
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sscanf(buf, "%u", &value);
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if (!((value == CTCM_PROTO_S390) ||
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(value == CTCM_PROTO_LINUX) ||
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(value == CTCM_PROTO_MPC) ||
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(value == CTCM_PROTO_OS390)))
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return -EINVAL;
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priv->protocol = value;
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CTCM_DBF_DEV(SETUP, dev, buf);
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return count;
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}
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static const char *ctcm_type[] = {
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"not a channel",
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"CTC/A",
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"FICON channel",
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"ESCON channel",
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"unknown channel type",
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"unsupported channel type",
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};
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static ssize_t ctcm_type_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct ccwgroup_device *cgdev;
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cgdev = to_ccwgroupdev(dev);
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if (!cgdev)
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return -ENODEV;
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return sprintf(buf, "%s\n",
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ctcm_type[cgdev->cdev[0]->id.driver_info]);
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}
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static DEVICE_ATTR(buffer, 0644, ctcm_buffer_show, ctcm_buffer_write);
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static DEVICE_ATTR(protocol, 0644, ctcm_proto_show, ctcm_proto_store);
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static DEVICE_ATTR(type, 0444, ctcm_type_show, NULL);
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static DEVICE_ATTR(stats, 0644, stats_show, stats_write);
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static struct attribute *ctcm_attr[] = {
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&dev_attr_protocol.attr,
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&dev_attr_type.attr,
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&dev_attr_buffer.attr,
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&dev_attr_stats.attr,
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NULL,
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};
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static struct attribute_group ctcm_attr_group = {
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.attrs = ctcm_attr,
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};
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const struct attribute_group *ctcm_attr_groups[] = {
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&ctcm_attr_group,
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NULL,
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};
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