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authorJack Wang <jinpu.wang@profitbricks.com>2017-01-02 13:19:24 +0100
committerDoug Ledford <dledford@redhat.com>2017-01-12 23:00:00 -0500
commit9e2c3f1c7f3edc6bdd83dab601418ac6c3b6df73 (patch)
treed9f6df0402e77e029b7628d78bc7c9979e083fa7
parentaaaca121c7cf9217ab81d9db0a04835d52aabebe (diff)
downloadlinux-9e2c3f1c7f3edc6bdd83dab601418ac6c3b6df73.tar.bz2
RDMA/core: export ib_get_cached_port_state
Export function for rdma_cm, patch for rdma_cm to follow. Signed-off-by: Jack Wang <jinpu.wang@profitbricks.com> Reviewed-by: Michael Wang <yun.wang@profitbricks.com> Acked-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
-rw-r--r--drivers/infiniband/core/cache.c18
-rw-r--r--include/rdma/ib_cache.h13
2 files changed, 31 insertions, 0 deletions
diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c
index 87fd7c39fbc0..f91886bab9d1 100644
--- a/drivers/infiniband/core/cache.c
+++ b/drivers/infiniband/core/cache.c
@@ -1021,6 +1021,24 @@ int ib_get_cached_lmc(struct ib_device *device,
}
EXPORT_SYMBOL(ib_get_cached_lmc);
+int ib_get_cached_port_state(struct ib_device *device,
+ u8 port_num,
+ enum ib_port_state *port_state)
+{
+ unsigned long flags;
+ int ret = 0;
+
+ if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
+ return -EINVAL;
+
+ read_lock_irqsave(&device->cache.lock, flags);
+ *port_state = device->cache.port_state_cache[port_num - rdma_start_port(device)];
+ read_unlock_irqrestore(&device->cache.lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL(ib_get_cached_port_state);
+
static void ib_cache_update(struct ib_device *device,
u8 port)
{
diff --git a/include/rdma/ib_cache.h b/include/rdma/ib_cache.h
index e30f19bd4a41..385ec88ee9e5 100644
--- a/include/rdma/ib_cache.h
+++ b/include/rdma/ib_cache.h
@@ -165,4 +165,17 @@ int ib_get_cached_lmc(struct ib_device *device,
u8 port_num,
u8 *lmc);
+/**
+ * ib_get_cached_port_state - Returns a cached port state table entry
+ * @device: The device to query.
+ * @port_num: The port number of the device to query.
+ * @port_state: port_state for the specified port for that device.
+ *
+ * ib_get_cached_port_state() fetches the specified port_state table entry stored in
+ * the local software cache.
+ */
+int ib_get_cached_port_state(struct ib_device *device,
+ u8 port_num,
+ enum ib_port_state *port_active);
+
#endif /* _IB_CACHE_H */