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Date: Sun, 7 Apr 2019 10:50:09 +0300
From: Leon Romanovsky <leon@...nel.org>
To: Doug Ledford <dledford@...hat.com>,
Jason Gunthorpe <jgg@...lanox.com>
Cc: Leon Romanovsky <leonro@...lanox.com>,
RDMA mailing list <linux-rdma@...r.kernel.org>,
Majd Dibbiny <majd@...lanox.com>,
Mark Zhang <markz@...lanox.com>,
Saeed Mahameed <saeedm@...lanox.com>,
linux-netdev <netdev@...r.kernel.org>
Subject: [PATCH rdma-next v1 13/17] RDMA/core: Get sum value of all counters when perform a sysfs stat read
From: Mark Zhang <markz@...lanox.com>
Since a QP can only be bound to one counter, then if it is bound to a
separate counter, for backward compatibility purpose, the statistic
value must be:
* stat of default counter
+ stat of all running allocated counters
+ stat of all deallocated counters (history stats)
Signed-off-by: Mark Zhang <markz@...lanox.com>
Reviewed-by: Majd Dibbiny <majd@...lanox.com>
Signed-off-by: Leon Romanovsky <leonro@...lanox.com>
---
drivers/infiniband/core/counters.c | 99 +++++++++++++++++++++++++++++-
drivers/infiniband/core/device.c | 8 ++-
drivers/infiniband/core/sysfs.c | 10 ++-
include/rdma/rdma_counter.h | 5 +-
4 files changed, 113 insertions(+), 9 deletions(-)
diff --git a/drivers/infiniband/core/counters.c b/drivers/infiniband/core/counters.c
index 36cd9eca1e46..f598b1cdb241 100644
--- a/drivers/infiniband/core/counters.c
+++ b/drivers/infiniband/core/counters.c
@@ -146,6 +146,20 @@ static int __rdma_counter_bind_qp(struct rdma_counter *counter,
return ret;
}
+static void counter_history_stat_update(const struct rdma_counter *counter)
+{
+ struct ib_device *dev = counter->device;
+ struct rdma_port_counter *port_counter;
+ int i;
+
+ port_counter = &dev->port_data[counter->port].port_counter;
+ if (!port_counter->hstats)
+ return;
+
+ for (i = 0; i < counter->stats->num_counters; i++)
+ port_counter->hstats->value[i] += counter->stats->value[i];
+}
+
static int __rdma_counter_unbind_qp(struct ib_qp *qp, bool force)
{
struct rdma_counter *counter = qp->counter;
@@ -285,8 +299,10 @@ int rdma_counter_unbind_qp(struct ib_qp *qp, bool force)
return ret;
rdma_restrack_put(&counter->res);
- if (atomic_dec_and_test(&counter->usecnt))
+ if (atomic_dec_and_test(&counter->usecnt)) {
+ counter_history_stat_update(counter);
rdma_counter_dealloc(counter);
+ }
return 0;
}
@@ -307,21 +323,98 @@ int rdma_counter_query_stats(struct rdma_counter *counter)
return ret;
}
-void rdma_counter_init(struct ib_device *dev)
+static u64 get_running_counters_hwstat_sum(struct ib_device *dev,
+ u8 port, u32 index)
+{
+ struct rdma_restrack_entry *res;
+ struct rdma_restrack_root *rt;
+ struct rdma_counter *counter;
+ unsigned long id = 0;
+ u64 sum = 0;
+
+ rt = &dev->res[RDMA_RESTRACK_COUNTER];
+ xa_lock(&rt->xa);
+ xa_for_each(&rt->xa, id, res) {
+ if (!rdma_restrack_get(res))
+ continue;
+
+ counter = container_of(res, struct rdma_counter, res);
+ if ((counter->device != dev) || (counter->port != port))
+ goto next;
+
+ if (rdma_counter_query_stats(counter))
+ goto next;
+
+ sum += counter->stats->value[index];
+next:
+ rdma_restrack_put(res);
+ }
+
+ xa_unlock(&rt->xa);
+ return sum;
+}
+
+/**
+ * rdma_counter_get_hwstat_value() - Get the sum value of all counters on a
+ * specific port, including the running ones and history data
+ */
+u64 rdma_counter_get_hwstat_value(struct ib_device *dev, u8 port, u32 index)
+{
+ struct rdma_port_counter *port_counter;
+ u64 sum;
+
+ if (!rdma_is_port_valid(dev, port))
+ return -EINVAL;
+
+ port_counter = &dev->port_data[port].port_counter;
+ if (index >= port_counter->hstats->num_counters)
+ return -EINVAL;
+
+ sum = get_running_counters_hwstat_sum(dev, port, index);
+ sum += port_counter->hstats->value[index];
+
+ return sum;
+}
+
+int rdma_counter_init(struct ib_device *dev)
{
struct rdma_port_counter *port_counter;
u32 port;
if (!dev->ops.alloc_hw_stats)
- return;
+ return 0;
rdma_for_each_port(dev, port) {
port_counter = &dev->port_data[port].port_counter;
port_counter->mode.mode = RDMA_COUNTER_MODE_NONE;
mutex_init(&port_counter->lock);
+
+ port_counter->hstats = dev->ops.alloc_hw_stats(dev, port);
+ if (!port_counter->hstats)
+ goto fail;
}
+
+ return 0;
+
+fail:
+ rdma_for_each_port(dev, port) {
+ port_counter = &dev->port_data[port].port_counter;
+ kfree(port_counter->hstats);
+ }
+
+ return -ENOMEM;
}
void rdma_counter_cleanup(struct ib_device *dev)
{
+ struct rdma_port_counter *port_counter;
+ u32 port;
+
+ if (!dev->ops.alloc_hw_stats)
+ return;
+
+ rdma_for_each_port(dev, port) {
+ port_counter = &dev->port_data[port].port_counter;
+ kfree(port_counter->hstats);
+ }
}
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index b24a15d7c0c6..82437eb2d1df 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -1276,7 +1276,11 @@ int ib_register_device(struct ib_device *device, const char *name)
goto dev_cleanup;
}
- rdma_counter_init(device);
+ ret = rdma_counter_init(device);
+ if (ret) {
+ dev_warn(&device->dev, "Couldn't initialize counter\n");
+ goto sysfs_cleanup;
+ }
ret = enable_device_and_get(device);
if (ret) {
@@ -1304,6 +1308,8 @@ int ib_register_device(struct ib_device *device, const char *name)
return 0;
+sysfs_cleanup:
+ ib_device_unregister_sysfs(device);
dev_cleanup:
device_del(&device->dev);
cg_cleanup:
diff --git a/drivers/infiniband/core/sysfs.c b/drivers/infiniband/core/sysfs.c
index 2fe89754e592..8d1cf1bbb5f5 100644
--- a/drivers/infiniband/core/sysfs.c
+++ b/drivers/infiniband/core/sysfs.c
@@ -43,6 +43,7 @@
#include <rdma/ib_mad.h>
#include <rdma/ib_pma.h>
#include <rdma/ib_cache.h>
+#include <rdma/rdma_counter.h>
struct ib_port;
@@ -795,9 +796,12 @@ static int update_hw_stats(struct ib_device *dev, struct rdma_hw_stats *stats,
return 0;
}
-static ssize_t print_hw_stat(struct rdma_hw_stats *stats, int index, char *buf)
+static ssize_t print_hw_stat(struct ib_device *dev, int port_num,
+ struct rdma_hw_stats *stats, int index, char *buf)
{
- return sprintf(buf, "%llu\n", stats->value[index]);
+ u64 v = rdma_counter_get_hwstat_value(dev, port_num, index);
+
+ return sprintf(buf, "%llu\n", stats->value[index] + v);
}
static ssize_t show_hw_stats(struct kobject *kobj, struct attribute *attr,
@@ -823,7 +827,7 @@ static ssize_t show_hw_stats(struct kobject *kobj, struct attribute *attr,
ret = update_hw_stats(dev, stats, hsa->port_num, hsa->index);
if (ret)
goto unlock;
- ret = print_hw_stat(stats, hsa->index, buf);
+ ret = print_hw_stat(dev, hsa->port_num, stats, hsa->index, buf);
unlock:
mutex_unlock(&stats->lock);
diff --git a/include/rdma/rdma_counter.h b/include/rdma/rdma_counter.h
index 4bc62909a638..5ad86ae67cc5 100644
--- a/include/rdma/rdma_counter.h
+++ b/include/rdma/rdma_counter.h
@@ -27,6 +27,7 @@ struct rdma_counter_mode {
struct rdma_port_counter {
struct rdma_counter_mode mode;
+ struct rdma_hw_stats *hstats;
struct mutex lock;
};
@@ -41,13 +42,13 @@ struct rdma_counter {
u8 port;
};
-void rdma_counter_init(struct ib_device *dev);
+int rdma_counter_init(struct ib_device *dev);
void rdma_counter_cleanup(struct ib_device *dev);
int rdma_counter_set_auto_mode(struct ib_device *dev, u8 port,
bool on, enum rdma_nl_counter_mask mask);
int rdma_counter_bind_qp_auto(struct ib_qp *qp, u8 port);
int rdma_counter_unbind_qp(struct ib_qp *qp, bool force);
-
int rdma_counter_query_stats(struct rdma_counter *counter);
+u64 rdma_counter_get_hwstat_value(struct ib_device *dev, u8 port, u32 index);
#endif /* _RDMA_COUNTER_H_ */
--
2.20.1
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