diff options
Diffstat (limited to 'drivers/infiniband/core/sysfs.c')
-rw-r--r-- | drivers/infiniband/core/sysfs.c | 366 |
1 files changed, 242 insertions, 124 deletions
diff --git a/drivers/infiniband/core/sysfs.c b/drivers/infiniband/core/sysfs.c index 14606af..5e573bb 100644 --- a/drivers/infiniband/core/sysfs.c +++ b/drivers/infiniband/core/sysfs.c @@ -56,8 +56,10 @@ struct ib_port { struct gid_attr_group *gid_attr_group; struct attribute_group gid_group; struct attribute_group pkey_group; - u8 port_num; struct attribute_group *pma_table; + struct attribute_group *hw_stats_ag; + struct rdma_hw_stats *hw_stats; + u8 port_num; }; struct port_attribute { @@ -80,6 +82,18 @@ struct port_table_attribute { __be16 attr_id; }; +struct hw_stats_attribute { + struct attribute attr; + ssize_t (*show)(struct kobject *kobj, + struct attribute *attr, char *buf); + ssize_t (*store)(struct kobject *kobj, + struct attribute *attr, + const char *buf, + size_t count); + int index; + u8 port_num; +}; + static ssize_t port_attr_show(struct kobject *kobj, struct attribute *attr, char *buf) { @@ -733,6 +747,212 @@ static struct attribute_group *get_counter_table(struct ib_device *dev, return &pma_group; } +static int update_hw_stats(struct ib_device *dev, struct rdma_hw_stats *stats, + u8 port_num, int index) +{ + int ret; + + if (time_is_after_eq_jiffies(stats->timestamp + stats->lifespan)) + return 0; + ret = dev->get_hw_stats(dev, stats, port_num, index); + if (ret < 0) + return ret; + if (ret == stats->num_counters) + stats->timestamp = jiffies; + + return 0; +} + +static ssize_t print_hw_stat(struct rdma_hw_stats *stats, int index, char *buf) +{ + return sprintf(buf, "%llu\n", stats->value[index]); +} + +static ssize_t show_hw_stats(struct kobject *kobj, struct attribute *attr, + char *buf) +{ + struct ib_device *dev; + struct ib_port *port; + struct hw_stats_attribute *hsa; + struct rdma_hw_stats *stats; + int ret; + + hsa = container_of(attr, struct hw_stats_attribute, attr); + if (!hsa->port_num) { + dev = container_of((struct device *)kobj, + struct ib_device, dev); + stats = dev->hw_stats; + } else { + port = container_of(kobj, struct ib_port, kobj); + dev = port->ibdev; + stats = port->hw_stats; + } + ret = update_hw_stats(dev, stats, hsa->port_num, hsa->index); + if (ret) + return ret; + return print_hw_stat(stats, hsa->index, buf); +} + +static ssize_t show_stats_lifespan(struct kobject *kobj, + struct attribute *attr, + char *buf) +{ + struct hw_stats_attribute *hsa; + int msecs; + + hsa = container_of(attr, struct hw_stats_attribute, attr); + if (!hsa->port_num) { + struct ib_device *dev = container_of((struct device *)kobj, + struct ib_device, dev); + msecs = jiffies_to_msecs(dev->hw_stats->lifespan); + } else { + struct ib_port *p = container_of(kobj, struct ib_port, kobj); + msecs = jiffies_to_msecs(p->hw_stats->lifespan); + } + return sprintf(buf, "%d\n", msecs); +} + +static ssize_t set_stats_lifespan(struct kobject *kobj, + struct attribute *attr, + const char *buf, size_t count) +{ + struct hw_stats_attribute *hsa; + int msecs; + int jiffies; + int ret; + + ret = kstrtoint(buf, 10, &msecs); + if (ret) + return ret; + if (msecs < 0 || msecs > 10000) + return -EINVAL; + jiffies = msecs_to_jiffies(msecs); + hsa = container_of(attr, struct hw_stats_attribute, attr); + if (!hsa->port_num) { + struct ib_device *dev = container_of((struct device *)kobj, + struct ib_device, dev); + dev->hw_stats->lifespan = jiffies; + } else { + struct ib_port *p = container_of(kobj, struct ib_port, kobj); + p->hw_stats->lifespan = jiffies; + } + return count; +} + +static void free_hsag(struct kobject *kobj, struct attribute_group *attr_group) +{ + struct attribute **attr; + + sysfs_remove_group(kobj, attr_group); + + for (attr = attr_group->attrs; *attr; attr++) + kfree(*attr); + kfree(attr_group); +} + +static struct attribute *alloc_hsa(int index, u8 port_num, const char *name) +{ + struct hw_stats_attribute *hsa; + + hsa = kmalloc(sizeof(*hsa), GFP_KERNEL); + if (!hsa) + return NULL; + + hsa->attr.name = (char *)name; + hsa->attr.mode = S_IRUGO; + hsa->show = show_hw_stats; + hsa->store = NULL; + hsa->index = index; + hsa->port_num = port_num; + + return &hsa->attr; +} + +static struct attribute *alloc_hsa_lifespan(char *name, u8 port_num) +{ + struct hw_stats_attribute *hsa; + + hsa = kmalloc(sizeof(*hsa), GFP_KERNEL); + if (!hsa) + return NULL; + + hsa->attr.name = name; + hsa->attr.mode = S_IWUSR | S_IRUGO; + hsa->show = show_stats_lifespan; + hsa->store = set_stats_lifespan; + hsa->index = 0; + hsa->port_num = port_num; + + return &hsa->attr; +} + +static void setup_hw_stats(struct ib_device *device, struct ib_port *port, + u8 port_num) +{ + struct attribute_group *hsag = NULL; + struct rdma_hw_stats *stats; + int i = 0, ret; + + stats = device->alloc_hw_stats(device, port_num); + + if (!stats) + return; + + if (!stats->names || stats->num_counters <= 0) + goto err; + + hsag = kzalloc(sizeof(*hsag) + + // 1 extra for the lifespan config entry + sizeof(void *) * (stats->num_counters + 1), + GFP_KERNEL); + if (!hsag) + return; + + ret = device->get_hw_stats(device, stats, port_num, + stats->num_counters); + if (ret != stats->num_counters) + goto err; + + stats->timestamp = jiffies; + + hsag->name = "hw_counters"; + hsag->attrs = (void *)hsag + sizeof(*hsag); + + for (i = 0; i < stats->num_counters; i++) { + hsag->attrs[i] = alloc_hsa(i, port_num, stats->names[i]); + if (!hsag->attrs[i]) + goto err; + } + + /* treat an error here as non-fatal */ + hsag->attrs[i] = alloc_hsa_lifespan("lifespan", port_num); + + if (port) { + struct kobject *kobj = &port->kobj; + ret = sysfs_create_group(kobj, hsag); + if (ret) + goto err; + port->hw_stats_ag = hsag; + port->hw_stats = stats; + } else { + struct kobject *kobj = &device->dev.kobj; + ret = sysfs_create_group(kobj, hsag); + if (ret) + goto err; + device->hw_stats_ag = hsag; + device->hw_stats = stats; + } + + return; + +err: + kfree(stats); + for (; i >= 0; i--) + kfree(hsag->attrs[i]); + kfree(hsag); + return; +} + static int add_port(struct ib_device *device, int port_num, int (*port_callback)(struct ib_device *, u8, struct kobject *)) @@ -835,6 +1055,14 @@ static int add_port(struct ib_device *device, int port_num, goto err_remove_pkey; } + /* + * If port == 0, it means we have only one port and the parent + * device, not this port device, should be the holder of the + * hw_counters + */ + if (device->alloc_hw_stats && port_num) + setup_hw_stats(device, p, port_num); + list_add_tail(&p->kobj.entry, &device->port_list); kobject_uevent(&p->kobj, KOBJ_ADD); @@ -972,120 +1200,6 @@ static struct device_attribute *ib_class_attributes[] = { &dev_attr_node_desc }; -/* Show a given an attribute in the statistics group */ -static ssize_t show_protocol_stat(const struct device *device, - struct device_attribute *attr, char *buf, - unsigned offset) -{ - struct ib_device *dev = container_of(device, struct ib_device, dev); - union rdma_protocol_stats stats; - ssize_t ret; - - ret = dev->get_protocol_stats(dev, &stats); - if (ret) - return ret; - - return sprintf(buf, "%llu\n", - (unsigned long long) ((u64 *) &stats)[offset]); -} - -/* generate a read-only iwarp statistics attribute */ -#define IW_STATS_ENTRY(name) \ -static ssize_t show_##name(struct device *device, \ - struct device_attribute *attr, char *buf) \ -{ \ - return show_protocol_stat(device, attr, buf, \ - offsetof(struct iw_protocol_stats, name) / \ - sizeof (u64)); \ -} \ -static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL) - -IW_STATS_ENTRY(ipInReceives); -IW_STATS_ENTRY(ipInHdrErrors); -IW_STATS_ENTRY(ipInTooBigErrors); -IW_STATS_ENTRY(ipInNoRoutes); -IW_STATS_ENTRY(ipInAddrErrors); -IW_STATS_ENTRY(ipInUnknownProtos); -IW_STATS_ENTRY(ipInTruncatedPkts); -IW_STATS_ENTRY(ipInDiscards); -IW_STATS_ENTRY(ipInDelivers); -IW_STATS_ENTRY(ipOutForwDatagrams); -IW_STATS_ENTRY(ipOutRequests); -IW_STATS_ENTRY(ipOutDiscards); -IW_STATS_ENTRY(ipOutNoRoutes); -IW_STATS_ENTRY(ipReasmTimeout); -IW_STATS_ENTRY(ipReasmReqds); -IW_STATS_ENTRY(ipReasmOKs); -IW_STATS_ENTRY(ipReasmFails); -IW_STATS_ENTRY(ipFragOKs); -IW_STATS_ENTRY(ipFragFails); -IW_STATS_ENTRY(ipFragCreates); -IW_STATS_ENTRY(ipInMcastPkts); -IW_STATS_ENTRY(ipOutMcastPkts); -IW_STATS_ENTRY(ipInBcastPkts); -IW_STATS_ENTRY(ipOutBcastPkts); -IW_STATS_ENTRY(tcpRtoAlgorithm); -IW_STATS_ENTRY(tcpRtoMin); -IW_STATS_ENTRY(tcpRtoMax); -IW_STATS_ENTRY(tcpMaxConn); -IW_STATS_ENTRY(tcpActiveOpens); -IW_STATS_ENTRY(tcpPassiveOpens); -IW_STATS_ENTRY(tcpAttemptFails); -IW_STATS_ENTRY(tcpEstabResets); -IW_STATS_ENTRY(tcpCurrEstab); -IW_STATS_ENTRY(tcpInSegs); -IW_STATS_ENTRY(tcpOutSegs); -IW_STATS_ENTRY(tcpRetransSegs); -IW_STATS_ENTRY(tcpInErrs); -IW_STATS_ENTRY(tcpOutRsts); - -static struct attribute *iw_proto_stats_attrs[] = { - &dev_attr_ipInReceives.attr, - &dev_attr_ipInHdrErrors.attr, - &dev_attr_ipInTooBigErrors.attr, - &dev_attr_ipInNoRoutes.attr, - &dev_attr_ipInAddrErrors.attr, - &dev_attr_ipInUnknownProtos.attr, - &dev_attr_ipInTruncatedPkts.attr, - &dev_attr_ipInDiscards.attr, - &dev_attr_ipInDelivers.attr, - &dev_attr_ipOutForwDatagrams.attr, - &dev_attr_ipOutRequests.attr, - &dev_attr_ipOutDiscards.attr, - &dev_attr_ipOutNoRoutes.attr, - &dev_attr_ipReasmTimeout.attr, - &dev_attr_ipReasmReqds.attr, - &dev_attr_ipReasmOKs.attr, - &dev_attr_ipReasmFails.attr, - &dev_attr_ipFragOKs.attr, - &dev_attr_ipFragFails.attr, - &dev_attr_ipFragCreates.attr, - &dev_attr_ipInMcastPkts.attr, - &dev_attr_ipOutMcastPkts.attr, - &dev_attr_ipInBcastPkts.attr, - &dev_attr_ipOutBcastPkts.attr, - &dev_attr_tcpRtoAlgorithm.attr, - &dev_attr_tcpRtoMin.attr, - &dev_attr_tcpRtoMax.attr, - &dev_attr_tcpMaxConn.attr, - &dev_attr_tcpActiveOpens.attr, - &dev_attr_tcpPassiveOpens.attr, - &dev_attr_tcpAttemptFails.attr, - &dev_attr_tcpEstabResets.attr, - &dev_attr_tcpCurrEstab.attr, - &dev_attr_tcpInSegs.attr, - &dev_attr_tcpOutSegs.attr, - &dev_attr_tcpRetransSegs.attr, - &dev_attr_tcpInErrs.attr, - &dev_attr_tcpOutRsts.attr, - NULL -}; - -static struct attribute_group iw_stats_group = { - .name = "proto_stats", - .attrs = iw_proto_stats_attrs, -}; - static void free_port_list_attributes(struct ib_device *device) { struct kobject *p, *t; @@ -1093,6 +1207,10 @@ static void free_port_list_attributes(struct ib_device *device) list_for_each_entry_safe(p, t, &device->port_list, entry) { struct ib_port *port = container_of(p, struct ib_port, kobj); list_del(&p->entry); + if (port->hw_stats) { + kfree(port->hw_stats); + free_hsag(&port->kobj, port->hw_stats_ag); + } sysfs_remove_group(p, port->pma_table); sysfs_remove_group(p, &port->pkey_group); sysfs_remove_group(p, &port->gid_group); @@ -1149,11 +1267,8 @@ int ib_device_register_sysfs(struct ib_device *device, } } - if (device->node_type == RDMA_NODE_RNIC && device->get_protocol_stats) { - ret = sysfs_create_group(&class_dev->kobj, &iw_stats_group); - if (ret) - goto err_put; - } + if (device->alloc_hw_stats) + setup_hw_stats(device, NULL, 0); return 0; @@ -1169,15 +1284,18 @@ err: void ib_device_unregister_sysfs(struct ib_device *device) { - /* Hold kobject until ib_dealloc_device() */ - struct kobject *kobj_dev = kobject_get(&device->dev.kobj); int i; - if (device->node_type == RDMA_NODE_RNIC && device->get_protocol_stats) - sysfs_remove_group(kobj_dev, &iw_stats_group); + /* Hold kobject until ib_dealloc_device() */ + kobject_get(&device->dev.kobj); free_port_list_attributes(device); + if (device->hw_stats) { + kfree(device->hw_stats); + free_hsag(&device->dev.kobj, device->hw_stats_ag); + } + for (i = 0; i < ARRAY_SIZE(ib_class_attributes); ++i) device_remove_file(&device->dev, ib_class_attributes[i]); |