IB/core: Add per port immutable struct to ib_device
As of commit 5eb620c81ce3 "IB/core: Add helpers for uncached GID and P_Key
searches"; pkey_tbl_len and gid_tbl_len are immutable data which are stored in
the ib_device.
The per port core capability flags to be added later are also immutable data to
be stored in the ib_device object.
In preparation for this create a structure for per port immutable data and
place the pkey and gid table lengths within this structure.
"get_port_immutable" is added as a mandatory device function to allow the
drivers to fill in this data.
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index be4465b5..2d3515e 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1481,6 +1481,11 @@
struct iw_cm_verbs;
+struct ib_port_immutable {
+ int pkey_tbl_len;
+ int gid_tbl_len;
+};
+
struct ib_device {
struct device *dma_device;
@@ -1494,8 +1499,10 @@
struct list_head client_data_list;
struct ib_cache cache;
- int *pkey_tbl_len;
- int *gid_tbl_len;
+ /**
+ * port_immutable is indexed by port number
+ */
+ struct ib_port_immutable *port_immutable;
int num_comp_vectors;
@@ -1684,6 +1691,14 @@
u32 local_dma_lkey;
u8 node_type;
u8 phys_port_cnt;
+
+ /**
+ * The following mandatory functions are used only at device
+ * registration. Keep functions such as these at the end of this
+ * structure to avoid cache line misses when accessing struct ib_device
+ * in fast paths.
+ */
+ int (*get_port_immutable)(struct ib_device *, u8, struct ib_port_immutable *);
};
struct ib_client {