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authorHal Rosenstock <hal@dev.mellanox.co.il>2015-06-29 09:57:00 -0400
committerDoug Ledford <dledford@redhat.com>2015-07-14 13:20:08 -0400
commit4139032b4860c06ff3a7687041f06535fed901ed (patch)
tree9ea32e684cac15f55e120518e908bea8b8703998 /include/rdma
parentbc0195aad0daa2ad5b0d76cce22b167bc3435590 (diff)
IB: Add rdma_cap_ib_switch helper and use where appropriate
Persuant to Liran's comments on node_type on linux-rdma mailing list: In an effort to reform the RDMA core and ULPs to minimize use of node_type in struct ib_device, an additional bit is added to struct ib_device for is_switch (IB switch). This is needed to be initialized by any IB switch device driver. This is a NEW requirement on such device drivers which are all "out of tree". In addition, an ib_switch helper was added to ib_verbs.h based on the is_switch device bit rather than node_type (although those should be consistent). The RDMA core (MAD, SMI, agent, sa_query, multicast, sysfs) as well as (IPoIB and SRP) ULPs are updated where appropriate to use this new helper. In some cases, the helper is now used under the covers of using rdma_[start end]_port rather than the open coding previously used. Reviewed-by: Sean Hefty <sean.hefty@intel.com> Reviewed-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Tested-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Hal Rosenstock <hal@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'include/rdma')
-rw-r--r--include/rdma/ib_verbs.h20
1 files changed, 17 insertions, 3 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 986fddb08579..b0f898e3b2e7 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1745,6 +1745,7 @@ struct ib_device {
char node_desc[64];
__be64 node_guid;
u32 local_dma_lkey;
+ u16 is_switch:1;
u8 node_type;
u8 phys_port_cnt;
@@ -1824,6 +1825,20 @@ enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device,
u8 port_num);
/**
+ * rdma_cap_ib_switch - Check if the device is IB switch
+ * @device: Device to check
+ *
+ * Device driver is responsible for setting is_switch bit on
+ * in ib_device structure at init time.
+ *
+ * Return: true if the device is IB switch.
+ */
+static inline bool rdma_cap_ib_switch(const struct ib_device *device)
+{
+ return device->is_switch;
+}
+
+/**
* rdma_start_port - Return the first valid port number for the device
* specified
*
@@ -1833,7 +1848,7 @@ enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device,
*/
static inline u8 rdma_start_port(const struct ib_device *device)
{
- return (device->node_type == RDMA_NODE_IB_SWITCH) ? 0 : 1;
+ return rdma_cap_ib_switch(device) ? 0 : 1;
}
/**
@@ -1846,8 +1861,7 @@ static inline u8 rdma_start_port(const struct ib_device *device)
*/
static inline u8 rdma_end_port(const struct ib_device *device)
{
- return (device->node_type == RDMA_NODE_IB_SWITCH) ?
- 0 : device->phys_port_cnt;
+ return rdma_cap_ib_switch(device) ? 0 : device->phys_port_cnt;
}
static inline bool rdma_protocol_ib(const struct ib_device *device, u8 port_num)

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