diff options
Diffstat (limited to 'drivers/infiniband/sw/rdmavt/qp.c')
-rw-r--r-- | drivers/infiniband/sw/rdmavt/qp.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/drivers/infiniband/sw/rdmavt/qp.c b/drivers/infiniband/sw/rdmavt/qp.c new file mode 100644 index 000000000000..a59f28d16143 --- /dev/null +++ b/drivers/infiniband/sw/rdmavt/qp.c @@ -0,0 +1,120 @@ +/* + * Copyright(c) 2015 Intel Corporation. + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * BSD LICENSE + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * - Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +#include "qp.h" + +/** + * rvt_create_qp - create a queue pair for a device + * @ibpd: the protection domain who's device we create the queue pair for + * @init_attr: the attributes of the queue pair + * @udata: user data for libibverbs.so + * + * Returns the queue pair on success, otherwise returns an errno. + * + * Called by the ib_create_qp() core verbs function. + */ +struct ib_qp *rvt_create_qp(struct ib_pd *ibpd, + struct ib_qp_init_attr *init_attr, + struct ib_udata *udata) +{ + /* + * Queue pair creation is mostly an rvt issue. However, drivers have + * their own unique idea of what queue pare numbers mean. For instance + * there is a reserved range for PSM. + * + * VI-DRIVER-API: make_qpn() + * Returns a valid QPN for verbs to use + */ + return ERR_PTR(-EOPNOTSUPP); +} + +/** + * qib_modify_qp - modify the attributes of a queue pair + * @ibqp: the queue pair who's attributes we're modifying + * @attr: the new attributes + * @attr_mask: the mask of attributes to modify + * @udata: user data for libibverbs.so + * + * Returns 0 on success, otherwise returns an errno. + */ +int rvt_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, + int attr_mask, struct ib_udata *udata) +{ + /* + * VT-DRIVER-API: qp_mtu() + * OPA devices have a per VL MTU the driver has a mapping of IB SL to SC + * to VL and the mapping table of MTUs per VL. This is not something + * that IB has and should not live in the rvt. + */ + return -EOPNOTSUPP; +} + +/** + * rvt_destroy_qp - destroy a queue pair + * @ibqp: the queue pair to destroy + * + * Returns 0 on success. + * + * Note that this can be called while the QP is actively sending or + * receiving! + */ +int rvt_destroy_qp(struct ib_qp *ibqp) +{ + /* + * VT-DRIVER-API: qp_flush() + * Driver provies a mechanism to flush and wait for that flush to + * finish. + */ + + return -EOPNOTSUPP; +} + +int rvt_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, + int attr_mask, struct ib_qp_init_attr *init_attr) +{ + return -EOPNOTSUPP; +} |