diff mbox series

[for-next,v4,1/2] RDMA/core: Add helper function to retrieve driver gid context from gid attr

Message ID 1582107594-5180-2-git-send-email-selvin.xavier@broadcom.com (mailing list archive)
State Accepted
Delegated to: Jason Gunthorpe
Headers show
Series Retrieve HW GID context from ib_gid_attr | expand

Commit Message

Selvin Xavier Feb. 19, 2020, 10:19 a.m. UTC 
Adding a helper function to retrieve the driver gid context
from the gid attr.

Suggested-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
---
 drivers/infiniband/core/cache.c | 20 ++++++++++++++++++++
 include/rdma/ib_cache.h         |  1 +
 2 files changed, 21 insertions(+)
diff mbox series

Patch

diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c
index 17bfedd..2ebf322 100644
--- a/drivers/infiniband/core/cache.c
+++ b/drivers/infiniband/core/cache.c
@@ -973,6 +973,26 @@  int rdma_query_gid(struct ib_device *device, u8 port_num,
 EXPORT_SYMBOL(rdma_query_gid);
 
 /**
+ * rdma_read_gid_hw_context - Read the HW GID context from GID attribute
+ * @attr:		Potinter to the GID attribute
+ *
+ * rdma_read_gid_hw_context() reads the vendor drivers GID HW
+ * context corresponding to SGID attr. Callers are required to already
+ * be holding the reference to existing GID entry.
+ *
+ * Returns HW GID context
+ *
+ */
+void *rdma_read_gid_hw_context(const struct ib_gid_attr *attr)
+{
+	struct ib_gid_table_entry *entry =
+		container_of(attr, struct ib_gid_table_entry, attr);
+
+	return entry->context;
+}
+EXPORT_SYMBOL(rdma_read_gid_hw_context);
+
+/**
  * rdma_find_gid - Returns SGID attributes if the matching GID is found.
  * @device: The device to query.
  * @gid: The GID value to search for.
diff --git a/include/rdma/ib_cache.h b/include/rdma/ib_cache.h
index 870b5e6..e06d133 100644
--- a/include/rdma/ib_cache.h
+++ b/include/rdma/ib_cache.h
@@ -39,6 +39,7 @@ 
 
 int rdma_query_gid(struct ib_device *device, u8 port_num, int index,
 		   union ib_gid *gid);
+void *rdma_read_gid_hw_context(const struct ib_gid_attr *attr);
 const struct ib_gid_attr *rdma_find_gid(struct ib_device *device,
 					const union ib_gid *gid,
 					enum ib_gid_type gid_type,