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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 | // 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, }; |