diff options
Diffstat (limited to 'drivers/s390/net/ctcm_sysfs.c')
| -rw-r--r-- | drivers/s390/net/ctcm_sysfs.c | 210 |
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 000000000..e3813a7aa --- /dev/null +++ b/drivers/s390/net/ctcm_sysfs.c @@ -0,0 +1,210 @@ +// 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; + + if (!(priv && priv->channel[CTCM_READ] && + priv->channel[CTCM_READ]->netdev)) { + CTCM_DBF_TEXT(SETUP, CTC_DBF_ERROR, "bfnondev"); + return -ENODEV; + } + ndev = priv->channel[CTCM_READ]->netdev; + + 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, +}; |