From 9e2c3f1c7f3edc6bdd83dab601418ac6c3b6df73 Mon Sep 17 00:00:00 2001 From: Jack Wang Date: Mon, 2 Jan 2017 13:19:24 +0100 Subject: [PATCH] RDMA/core: export ib_get_cached_port_state Export function for rdma_cm, patch for rdma_cm to follow. Signed-off-by: Jack Wang Reviewed-by: Michael Wang Acked-by: Sean Hefty Signed-off-by: Doug Ledford --- drivers/infiniband/core/cache.c | 18 ++++++++++++++++++ include/rdma/ib_cache.h | 13 +++++++++++++ 2 files changed, 31 insertions(+) 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 */