From 779820c2e1e9251ddfdce5dd43b0bba30cd22271 Mon Sep 17 00:00:00 2001 From: Selvin Xavier Date: Wed, 19 Feb 2020 02:19:53 -0800 Subject: [PATCH] RDMA/core: Add helper function to retrieve driver gid context from gid attr Adding a helper function to retrieve the driver gid context from the gid attr. Link: https://lore.kernel.org/r/1582107594-5180-2-git-send-email-selvin.xavier@broadcom.com Suggested-by: Jason Gunthorpe Signed-off-by: Selvin Xavier Signed-off-by: Jason Gunthorpe --- drivers/infiniband/core/cache.c | 17 +++++++++++++++++ include/rdma/ib_cache.h | 1 + 2 files changed, 18 insertions(+) diff --git a/drivers/infiniband/core/cache.c b/drivers/infiniband/core/cache.c index 17bfedd24cc3..9bbdace3c809 100644 --- a/drivers/infiniband/core/cache.c +++ b/drivers/infiniband/core/cache.c @@ -972,6 +972,23 @@ done: } 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 drivers GID HW context corresponding + * to the SGID attr. Callers are required to already be holding the reference + * to an existing GID entry. + * + * Returns the HW GID context + * + */ +void *rdma_read_gid_hw_context(const struct ib_gid_attr *attr) +{ + return container_of(attr, struct ib_gid_table_entry, attr)->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. diff --git a/include/rdma/ib_cache.h b/include/rdma/ib_cache.h index 870b5e6c06db..e06d13388ae7 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,