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authorMark Zhang <markz@mellanox.com>2019-07-02 13:02:42 +0300
committerJason Gunthorpe <jgg@mellanox.com>2019-07-05 10:22:55 -0300
commitf34a55e497e81347ffbdc6e828f123520d33ce5d (patch)
treefcce7e5fd3679bbb3870b10445a5f04da5d84304 /drivers/infiniband/core/counters.c
parentIB/mlx5: Add counter_alloc_stats() and counter_update_stats() support (diff)
downloadlinux-dev-f34a55e497e81347ffbdc6e828f123520d33ce5d.tar.xz
linux-dev-f34a55e497e81347ffbdc6e828f123520d33ce5d.zip
RDMA/core: Get sum value of all counters when perform a sysfs stat read
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@mellanox.com> Reviewed-by: Majd Dibbiny <majd@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/core/counters.c')
-rw-r--r--drivers/infiniband/core/counters.c89
1 files changed, 89 insertions, 0 deletions
diff --git a/drivers/infiniband/core/counters.c b/drivers/infiniband/core/counters.c
index 3741b9e5126a..8810a8a8d1f5 100644
--- a/drivers/infiniband/core/counters.c
+++ b/drivers/infiniband/core/counters.c
@@ -158,6 +158,20 @@ static int __rdma_counter_unbind_qp(struct ib_qp *qp)
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];
+}
+
/**
* rdma_get_counter_auto_mode - Find the counter that @qp should be bound
* with in auto mode
@@ -215,6 +229,7 @@ static void counter_release(struct kref *kref)
struct rdma_counter *counter;
counter = container_of(kref, struct rdma_counter, kref);
+ counter_history_stat_update(counter);
counter->device->ops.counter_dealloc(counter);
rdma_counter_free(counter);
}
@@ -299,6 +314,55 @@ int rdma_counter_query_stats(struct rdma_counter *counter)
return ret;
}
+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;
+
+ xa_unlock(&rt->xa);
+
+ counter = container_of(res, struct rdma_counter, res);
+ if ((counter->device != dev) || (counter->port != port) ||
+ rdma_counter_query_stats(counter))
+ goto next;
+
+ sum += counter->stats->value[index];
+
+next:
+ xa_lock(&rt->xa);
+ 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;
+
+ port_counter = &dev->port_data[port].port_counter;
+ sum = get_running_counters_hwstat_sum(dev, port, index);
+ sum += port_counter->hstats->value[index];
+
+ return sum;
+}
+
void rdma_counter_init(struct ib_device *dev)
{
struct rdma_port_counter *port_counter;
@@ -311,9 +375,34 @@ void rdma_counter_init(struct ib_device *dev)
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;
+
+fail:
+ rdma_for_each_port(dev, port) {
+ port_counter = &dev->port_data[port].port_counter;
+ kfree(port_counter->hstats);
+ port_counter->hstats = NULL;
+ }
+
+ return;
}
void rdma_counter_release(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);
+ }
}