Messages in this thread Patch in this message | | | From | Leon Romanovsky <> | Subject | [PATCH rdma-next 3/8] IB/cm: Skip device which doesn't support IB CM | Date | Mon, 5 Apr 2021 08:49:55 +0300 |
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From: Parav Pandit <parav@nvidia.com>
There are at least 3 types of RDMA devices which do not support IB CM. They are (1) A (eswitch) switchdev RDMA device, (2) iWARP device and (3) RDMA device without a RoCE capability
Hence, avoid IB CM initialization for such devices.
This saves 8Kbytes of memory for eswitch device consist of 512 ports and also avoids unnecessary initialization for all above 3 types of devices.
Signed-off-by: Parav Pandit <parav@nvidia.com> Signed-off-by: Leon Romanovsky <leonro@nvidia.com> --- drivers/infiniband/core/cm.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c index 8a7791ebae69..5025f2c1347b 100644 --- a/drivers/infiniband/core/cm.c +++ b/drivers/infiniband/core/cm.c @@ -87,6 +87,7 @@ struct cm_id_private; struct cm_work; static int cm_add_one(struct ib_device *device); static void cm_remove_one(struct ib_device *device, void *client_data); +static bool cm_supported(struct ib_device *device); static void cm_process_work(struct cm_id_private *cm_id_priv, struct cm_work *work); static int cm_send_sidr_rep_locked(struct cm_id_private *cm_id_priv, @@ -103,7 +104,8 @@ static int cm_send_rej_locked(struct cm_id_private *cm_id_priv, static struct ib_client cm_client = { .name = "cm", .add = cm_add_one, - .remove = cm_remove_one + .remove = cm_remove_one, + .is_supported = cm_supported, }; static struct ib_cm { @@ -4371,6 +4373,17 @@ static void cm_remove_port_fs(struct cm_port *port) } +static bool cm_supported(struct ib_device *device) +{ + u32 i; + + rdma_for_each_port(device, i) { + if (rdma_cap_ib_cm(device, i)) + return true; + } + return false; +} + static int cm_add_one(struct ib_device *ib_device) { struct cm_device *cm_dev; -- 2.30.2
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