^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright IBM Corp. 2007, 2007
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Authors: Peter Tiedemann (ptiedem@de.ibm.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #undef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #undef DEBUGDATA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #undef DEBUGCCW
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #define KMSG_COMPONENT "ctcm"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "ctcm_main.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * sysfs attributes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static ssize_t ctcm_buffer_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct ctcm_priv *priv = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) return sprintf(buf, "%d\n", priv->buffer_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static ssize_t ctcm_buffer_write(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct device_attribute *attr, const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct net_device *ndev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) unsigned int bs1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct ctcm_priv *priv = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) ndev = priv->channel[CTCM_READ]->netdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (!(priv && priv->channel[CTCM_READ] && ndev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) CTCM_DBF_TEXT(SETUP, CTC_DBF_ERROR, "bfnondev");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) rc = kstrtouint(buf, 0, &bs1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) goto einval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if (bs1 > CTCM_BUFSIZE_LIMIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) goto einval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) if (bs1 < (576 + LL_HEADER_LENGTH + 2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) goto einval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) priv->buffer_size = bs1; /* just to overwrite the default */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if ((ndev->flags & IFF_RUNNING) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) (bs1 < (ndev->mtu + LL_HEADER_LENGTH + 2)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) goto einval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) priv->channel[CTCM_READ]->max_bufsize = bs1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) priv->channel[CTCM_WRITE]->max_bufsize = bs1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (!(ndev->flags & IFF_RUNNING))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) ndev->mtu = bs1 - LL_HEADER_LENGTH - 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) priv->channel[CTCM_READ]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) priv->channel[CTCM_WRITE]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) CTCM_DBF_DEV(SETUP, ndev, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) einval:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) CTCM_DBF_DEV(SETUP, ndev, "buff_err");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static void ctcm_print_statistics(struct ctcm_priv *priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) char *sbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) char *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) sbuf = kmalloc(2048, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (sbuf == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) p = sbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) p += sprintf(p, " Device FSM state: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) fsm_getstate_str(priv->fsm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) p += sprintf(p, " RX channel FSM state: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) fsm_getstate_str(priv->channel[CTCM_READ]->fsm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) p += sprintf(p, " TX channel FSM state: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) fsm_getstate_str(priv->channel[CTCM_WRITE]->fsm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) p += sprintf(p, " Max. TX buffer used: %ld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) priv->channel[WRITE]->prof.maxmulti);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) p += sprintf(p, " Max. chained SKBs: %ld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) priv->channel[WRITE]->prof.maxcqueue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) p += sprintf(p, " TX single write ops: %ld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) priv->channel[WRITE]->prof.doios_single);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) p += sprintf(p, " TX multi write ops: %ld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) priv->channel[WRITE]->prof.doios_multi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) p += sprintf(p, " Netto bytes written: %ld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) priv->channel[WRITE]->prof.txlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) p += sprintf(p, " Max. TX IO-time: %u\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) jiffies_to_usecs(priv->channel[WRITE]->prof.tx_time));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) printk(KERN_INFO "Statistics for %s:\n%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) priv->channel[CTCM_WRITE]->netdev->name, sbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) kfree(sbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) static ssize_t stats_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct ctcm_priv *priv = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (!priv || gdev->state != CCWGROUP_ONLINE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) ctcm_print_statistics(priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return sprintf(buf, "0\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) static ssize_t stats_write(struct device *dev, struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) struct ctcm_priv *priv = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /* Reset statistics */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) memset(&priv->channel[WRITE]->prof, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) sizeof(priv->channel[CTCM_WRITE]->prof));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static ssize_t ctcm_proto_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) struct ctcm_priv *priv = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return sprintf(buf, "%d\n", priv->protocol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static ssize_t ctcm_proto_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) struct device_attribute *attr, const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) int value, rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) struct ctcm_priv *priv = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) rc = kstrtoint(buf, 0, &value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (rc ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) !((value == CTCM_PROTO_S390) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) (value == CTCM_PROTO_LINUX) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) (value == CTCM_PROTO_MPC) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) (value == CTCM_PROTO_OS390)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) priv->protocol = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) CTCM_DBF_DEV(SETUP, dev, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static const char *ctcm_type[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) "not a channel",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) "CTC/A",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) "FICON channel",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) "ESCON channel",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) "unknown channel type",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) "unsupported channel type",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static ssize_t ctcm_type_show(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) struct ccwgroup_device *cgdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) cgdev = to_ccwgroupdev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) if (!cgdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) return sprintf(buf, "%s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) ctcm_type[cgdev->cdev[0]->id.driver_info]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static DEVICE_ATTR(buffer, 0644, ctcm_buffer_show, ctcm_buffer_write);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static DEVICE_ATTR(protocol, 0644, ctcm_proto_show, ctcm_proto_store);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) static DEVICE_ATTR(type, 0444, ctcm_type_show, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static DEVICE_ATTR(stats, 0644, stats_show, stats_write);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static struct attribute *ctcm_attr[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) &dev_attr_protocol.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) &dev_attr_type.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) &dev_attr_buffer.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) &dev_attr_stats.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static struct attribute_group ctcm_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) .attrs = ctcm_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) const struct attribute_group *ctcm_attr_groups[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) &ctcm_attr_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) };
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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