/* * 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/sysfs.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); if (!(priv && priv->channel[READ] && (ndev = priv->channel[READ]->netdev))) { 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[READ]->max_bufsize = bs1; priv->channel[WRITE]->max_bufsize = bs1; if (!(ndev->flags & IFF_RUNNING)) ndev->mtu = bs1 - LL_HEADER_LENGTH - 2; priv->channel[READ]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED; priv->channel[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[READ]->fsm)); p += sprintf(p, " TX channel FSM state: %s\n", fsm_getstate_str(priv->channel[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[WRITE]->netdev->name, sbuf); kfree(sbuf); return; } static ssize_t stats_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ctcm_priv *priv = dev_get_drvdata(dev); if (!priv) 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[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 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", cu3088_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, NULL, }; static struct attribute_group ctcm_attr_group = { .attrs = ctcm_attr, }; int ctcm_add_attributes(struct device *dev) { int rc; rc = device_create_file(dev, &dev_attr_stats); return rc; } void ctcm_remove_attributes(struct device *dev) { device_remove_file(dev, &dev_attr_stats); } int ctcm_add_files(struct device *dev) { return sysfs_create_group(&dev->kobj, &ctcm_attr_group); } void ctcm_remove_files(struct device *dev) { sysfs_remove_group(&dev->kobj, &ctcm_attr_group); }