--- /dev/null
+/*
+ * 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;
+
+ ndev = priv->channel[CTCM_READ]->netdev;
+ if (!(priv && priv->channel[CTCM_READ] && ndev)) {
+ CTCM_DBF_TEXT(SETUP, CTC_DBF_ERROR, "bfnondev");
+ return -ENODEV;
+ }
+
+ 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,
+};
Code Review / kvmfornfv.git / blobdiff