1 /* 2 * Copyright IBM Corp. 2007, 2007 3 * Authors: Peter Tiedemann (ptiedem@de.ibm.com) 4 * 5 */ 6 7 #undef DEBUG 8 #undef DEBUGDATA 9 #undef DEBUGCCW 10 11 #define KMSG_COMPONENT "ctcm" 12 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 13 14 #include <linux/device.h> 15 #include <linux/sysfs.h> 16 #include <linux/slab.h> 17 #include "ctcm_main.h" 18 19 /* 20 * sysfs attributes 21 */ 22 23 static ssize_t ctcm_buffer_show(struct device *dev, 24 struct device_attribute *attr, char *buf) 25 { 26 struct ctcm_priv *priv = dev_get_drvdata(dev); 27 28 if (!priv) 29 return -ENODEV; 30 return sprintf(buf, "%d\n", priv->buffer_size); 31 } 32 33 static ssize_t ctcm_buffer_write(struct device *dev, 34 struct device_attribute *attr, const char *buf, size_t count) 35 { 36 struct net_device *ndev; 37 int bs1; 38 struct ctcm_priv *priv = dev_get_drvdata(dev); 39 40 ndev = priv->channel[CTCM_READ]->netdev; 41 if (!(priv && priv->channel[CTCM_READ] && ndev)) { 42 CTCM_DBF_TEXT(SETUP, CTC_DBF_ERROR, "bfnondev"); 43 return -ENODEV; 44 } 45 46 sscanf(buf, "%u", &bs1); 47 if (bs1 > CTCM_BUFSIZE_LIMIT) 48 goto einval; 49 if (bs1 < (576 + LL_HEADER_LENGTH + 2)) 50 goto einval; 51 priv->buffer_size = bs1; /* just to overwrite the default */ 52 53 if ((ndev->flags & IFF_RUNNING) && 54 (bs1 < (ndev->mtu + LL_HEADER_LENGTH + 2))) 55 goto einval; 56 57 priv->channel[CTCM_READ]->max_bufsize = bs1; 58 priv->channel[CTCM_WRITE]->max_bufsize = bs1; 59 if (!(ndev->flags & IFF_RUNNING)) 60 ndev->mtu = bs1 - LL_HEADER_LENGTH - 2; 61 priv->channel[CTCM_READ]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED; 62 priv->channel[CTCM_WRITE]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED; 63 64 CTCM_DBF_DEV(SETUP, ndev, buf); 65 return count; 66 67 einval: 68 CTCM_DBF_DEV(SETUP, ndev, "buff_err"); 69 return -EINVAL; 70 } 71 72 static void ctcm_print_statistics(struct ctcm_priv *priv) 73 { 74 char *sbuf; 75 char *p; 76 77 if (!priv) 78 return; 79 sbuf = kmalloc(2048, GFP_KERNEL); 80 if (sbuf == NULL) 81 return; 82 p = sbuf; 83 84 p += sprintf(p, " Device FSM state: %s\n", 85 fsm_getstate_str(priv->fsm)); 86 p += sprintf(p, " RX channel FSM state: %s\n", 87 fsm_getstate_str(priv->channel[CTCM_READ]->fsm)); 88 p += sprintf(p, " TX channel FSM state: %s\n", 89 fsm_getstate_str(priv->channel[CTCM_WRITE]->fsm)); 90 p += sprintf(p, " Max. TX buffer used: %ld\n", 91 priv->channel[WRITE]->prof.maxmulti); 92 p += sprintf(p, " Max. chained SKBs: %ld\n", 93 priv->channel[WRITE]->prof.maxcqueue); 94 p += sprintf(p, " TX single write ops: %ld\n", 95 priv->channel[WRITE]->prof.doios_single); 96 p += sprintf(p, " TX multi write ops: %ld\n", 97 priv->channel[WRITE]->prof.doios_multi); 98 p += sprintf(p, " Netto bytes written: %ld\n", 99 priv->channel[WRITE]->prof.txlen); 100 p += sprintf(p, " Max. TX IO-time: %ld\n", 101 priv->channel[WRITE]->prof.tx_time); 102 103 printk(KERN_INFO "Statistics for %s:\n%s", 104 priv->channel[CTCM_WRITE]->netdev->name, sbuf); 105 kfree(sbuf); 106 return; 107 } 108 109 static ssize_t stats_show(struct device *dev, 110 struct device_attribute *attr, char *buf) 111 { 112 struct ccwgroup_device *gdev = to_ccwgroupdev(dev); 113 struct ctcm_priv *priv = dev_get_drvdata(dev); 114 115 if (!priv || gdev->state != CCWGROUP_ONLINE) 116 return -ENODEV; 117 ctcm_print_statistics(priv); 118 return sprintf(buf, "0\n"); 119 } 120 121 static ssize_t stats_write(struct device *dev, struct device_attribute *attr, 122 const char *buf, size_t count) 123 { 124 struct ctcm_priv *priv = dev_get_drvdata(dev); 125 if (!priv) 126 return -ENODEV; 127 /* Reset statistics */ 128 memset(&priv->channel[WRITE]->prof, 0, 129 sizeof(priv->channel[CTCM_WRITE]->prof)); 130 return count; 131 } 132 133 static ssize_t ctcm_proto_show(struct device *dev, 134 struct device_attribute *attr, char *buf) 135 { 136 struct ctcm_priv *priv = dev_get_drvdata(dev); 137 if (!priv) 138 return -ENODEV; 139 140 return sprintf(buf, "%d\n", priv->protocol); 141 } 142 143 static ssize_t ctcm_proto_store(struct device *dev, 144 struct device_attribute *attr, const char *buf, size_t count) 145 { 146 int value; 147 struct ctcm_priv *priv = dev_get_drvdata(dev); 148 149 if (!priv) 150 return -ENODEV; 151 sscanf(buf, "%u", &value); 152 if (!((value == CTCM_PROTO_S390) || 153 (value == CTCM_PROTO_LINUX) || 154 (value == CTCM_PROTO_MPC) || 155 (value == CTCM_PROTO_OS390))) 156 return -EINVAL; 157 priv->protocol = value; 158 CTCM_DBF_DEV(SETUP, dev, buf); 159 160 return count; 161 } 162 163 static const char *ctcm_type[] = { 164 "not a channel", 165 "CTC/A", 166 "FICON channel", 167 "ESCON channel", 168 "unknown channel type", 169 "unsupported channel type", 170 }; 171 172 static ssize_t ctcm_type_show(struct device *dev, 173 struct device_attribute *attr, char *buf) 174 { 175 struct ccwgroup_device *cgdev; 176 177 cgdev = to_ccwgroupdev(dev); 178 if (!cgdev) 179 return -ENODEV; 180 181 return sprintf(buf, "%s\n", 182 ctcm_type[cgdev->cdev[0]->id.driver_info]); 183 } 184 185 static DEVICE_ATTR(buffer, 0644, ctcm_buffer_show, ctcm_buffer_write); 186 static DEVICE_ATTR(protocol, 0644, ctcm_proto_show, ctcm_proto_store); 187 static DEVICE_ATTR(type, 0444, ctcm_type_show, NULL); 188 static DEVICE_ATTR(stats, 0644, stats_show, stats_write); 189 190 static struct attribute *ctcm_attr[] = { 191 &dev_attr_protocol.attr, 192 &dev_attr_type.attr, 193 &dev_attr_buffer.attr, 194 &dev_attr_stats.attr, 195 NULL, 196 }; 197 198 static struct attribute_group ctcm_attr_group = { 199 .attrs = ctcm_attr, 200 }; 201 const struct attribute_group *ctcm_attr_groups[] = { 202 &ctcm_attr_group, 203 NULL, 204 }; 205