Adding a helper function to retrieve the driver gid context
from the gid index.
Suggested-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
Signed-off-by: Selvin Xavier <selvin.xavier@xxxxxxxxxxxx>
---
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 e9a409d..f336467 100644
--- a/drivers/infiniband/core/cache.c
+++ b/drivers/infiniband/core/cache.c
@@ -859,6 +859,24 @@ int ib_find_cached_gid(struct ib_device *device,
}
EXPORT_SYMBOL(ib_find_cached_gid);
+void *ib_get_gid_context_by_index(struct ib_device *device,
+ u8 port_num,
+ u16 index)
+{
+ struct ib_gid_table *table;
+
+ if (!rdma_is_port_valid(device, port_num))
+ return NULL;
+
+ table = device->cache.ports[port_num - rdma_start_port(device)].gid;
+
+ if (index < 0 || index >= table->sz)
+ return NULL;
+
+ return table->data_vec[index].context;
+}
+EXPORT_SYMBOL(ib_get_gid_context_by_index);
+
int ib_find_gid_by_filter(struct ib_device *device,
const union ib_gid *gid,
u8 port_num,
diff --git a/include/rdma/ib_cache.h b/include/rdma/ib_cache.h
index 385ec88..e5727e9 100644
--- a/include/rdma/ib_cache.h
+++ b/include/rdma/ib_cache.h
@@ -105,6 +105,19 @@ int ib_find_gid_by_filter(struct ib_device *device,
const struct ib_gid_attr *,
void *),
void *context, u16 *index);
+
+/**
+ * ib_get_gid_context_by_index - Returns HW driver's GID context for the
+ * specified gid index
+ * @device: The device to query
+ * @port_num: The port number of the device where the GID value belongs
+ * @index: The index into the cached GID table
+ */
+
+void *ib_get_gid_context_by_index(struct ib_device *device,
+ u8 port_num,
+ u16 index);
+
/**
* ib_get_cached_pkey - Returns a cached PKey table entry
* @device: The device to query.
--
2.5.5
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