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authorJack Morgenstein <jackm@dev.mellanox.co.il>2012-08-03 08:40:39 +0000
committerRoland Dreier <roland@purestorage.com>2012-09-30 20:33:30 -0700
commit73aaa7418f8069103ca56fc620b3cd16c5a37d6e (patch)
tree0110a685c949f7ce92e804ddff1cf6f34482d152 /include/rdma
parentff7166c447df23a61e4f51bf748319dc6728dc74 (diff)
downloadlinux-73aaa7418f8069103ca56fc620b3cd16c5a37d6e.tar.bz2
IB/core: Add ib_find_exact_cached_pkey()
When P_Key tables potentially contain both full and partial membership copies for the same P_Key, we need a function to find the index for an exact (16-bit) P_Key. This is necessary when the master forwards QP1 MADs sent by guests. If the guest has sent the MAD with a limited membership P_Key, we need to to forward the MAD using the same limited membership P_Key. Since the master may have both the limited and the full member P_Keys in its table, we must make sure to retrieve the limited membership P_Key in this case. Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'include/rdma')
-rw-r--r--include/rdma/ib_cache.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/rdma/ib_cache.h b/include/rdma/ib_cache.h
index 00a2b8ec327f..ad9a3c280944 100644
--- a/include/rdma/ib_cache.h
+++ b/include/rdma/ib_cache.h
@@ -101,6 +101,22 @@ int ib_find_cached_pkey(struct ib_device *device,
u16 *index);
/**
+ * ib_find_exact_cached_pkey - Returns the PKey table index where a specified
+ * PKey value occurs. Comparison uses the FULL 16 bits (incl membership bit)
+ * @device: The device to query.
+ * @port_num: The port number of the device to search for the PKey.
+ * @pkey: The PKey value to search for.
+ * @index: The index into the cached PKey table where the PKey was found.
+ *
+ * ib_find_exact_cached_pkey() searches the specified PKey table in
+ * the local software cache.
+ */
+int ib_find_exact_cached_pkey(struct ib_device *device,
+ u8 port_num,
+ u16 pkey,
+ u16 *index);
+
+/**
* ib_get_cached_lmc - Returns a cached lmc table entry
* @device: The device to query.
* @port_num: The port number of the device to query.