diff options
| author | Leon Romanovsky <leonro@mellanox.com> | 2015-12-20 10:16:10 (GMT) |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2015-12-24 04:33:14 (GMT) |
| commit | 8a06ce59a4cd034c52c59c44ff6b0785a3969409 (patch) | |
| tree | 6b42a1d753696101ea2de9d96e3b95119db076e4 /drivers/infiniband | |
| parent | 7ca0bc53652382529b1cc1c39987cf93084d5828 (diff) | |
| download | linux-8a06ce59a4cd034c52c59c44ff6b0785a3969409.tar.xz | |
IB/core: Add cross-channel support
The cross-channel feature allows to execute WQEs that involve
synchronization of I/O operations’ on different QPs.
This capability enables to program complex flows with a single
function call, hereby significantly reducing overhead associated
with I/O processing.
Cross-channel operations support is indicated by HCA capability
information.
The queue pairs can be configured to work as a “sync master queue”
or “sync slave queues”.
The added flags are:
1. Device capability flag IB_DEVICE_CROSS_CHANNEL for the
devices that can perform cross-channel operations.
2. CQ property flag IB_CQ_FLAGS_IGNORE_OVERRUN to disable CQ overrun
check. This check is useless in cross-channel scenario.
3. QP property flags to indicate if queues are slave or master:
* IB_QP_CREATE_MANAGED_SEND indicates that posted send work requests
will not be executed immediately and requires enabling.
* IB_QP_CREATE_MANAGED_RECV indicates that posted receive work
requests will not be executed immediately and requires enabling.
* IB_QP_CREATE_CROSS_CHANNEL declares the QP to work in cross-channel
mode. If IB_QP_CREATE_MANAGED_SEND and IB_QP_CREATE_MANAGED_RECV are
not provided, this QP will be sync master queue, else it will be sync
slave.
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/core/uverbs_cmd.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index 0a84182d..6ffc9c4 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -1824,7 +1824,10 @@ static int create_qp(struct ib_uverbs_file *file, sizeof(cmd->create_flags)) attr.create_flags = cmd->create_flags; - if (attr.create_flags & ~IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK) { + if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK | + IB_QP_CREATE_CROSS_CHANNEL | + IB_QP_CREATE_MANAGED_SEND | + IB_QP_CREATE_MANAGED_RECV)) { ret = -EINVAL; goto err_put; } |