linux-imx

/*

 * Copyright (c) 2004-2007 Voltaire, Inc. All rights reserved.

 * Copyright (c) 2005 Intel Corporation.  All rights reserved.

 * Copyright (c) 2005 Mellanox Technologies Ltd.  All rights reserved.

 * Copyright (c) 2009 HNR Consulting. All rights reserved.

 * Copyright (c) 2014 Intel Corporation.  All rights reserved.

 *

 * This software is available to you under a choice of one of two

 * licenses.  You may choose to be licensed under the terms of the GNU

 * General Public License (GPL) Version 2, available from the file

 * COPYING in the main directory of this source tree, or the

 * OpenIB.org BSD license below:

 *

 *     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.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

 * SOFTWARE.

 *

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/dma-mapping.h>

#include <linux/idr.h>

#include <linux/slab.h>

#include <linux/module.h>

#include <linux/security.h>

#include <rdma/ib_cache.h>

​

#include "mad_priv.h"

#include "core_priv.h"

#include "mad_rmpp.h"

#include "smi.h"

#include "opa_smi.h"

#include "agent.h"

​

static int mad_sendq_size = IB_MAD_QP_SEND_SIZE;

static int mad_recvq_size = IB_MAD_QP_RECV_SIZE;

​

module_param_named(send_queue_size, mad_sendq_size, int, 0444);

MODULE_PARM_DESC(send_queue_size, "Size of send queue in number of work requests");

module_param_named(recv_queue_size, mad_recvq_size, int, 0444);

MODULE_PARM_DESC(recv_queue_size, "Size of receive queue in number of work requests");

​

/*

 * The mlx4 driver uses the top byte to distinguish which virtual function

 * generated the MAD, so we must avoid using it.

 */

#define AGENT_ID_LIMIT      (1 << 24)

static DEFINE_IDR(ib_mad_clients);

static struct list_head ib_mad_port_list;

​

/* Port list lock */

static DEFINE_SPINLOCK(ib_mad_port_list_lock);

​

/* Forward declarations */

static int method_in_use(struct ib_mad_mgmt_method_table **method,

             struct ib_mad_reg_req *mad_reg_req);

static void remove_mad_reg_req(struct ib_mad_agent_private *priv);

static struct ib_mad_agent_private *find_mad_agent(

                    struct ib_mad_port_private *port_priv,

                    const struct ib_mad_hdr *mad);

static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info,

                    struct ib_mad_private *mad);

static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv);

static void timeout_sends(struct work_struct *work);

static void local_completions(struct work_struct *work);

static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req,

                  struct ib_mad_agent_private *agent_priv,

                  u8 mgmt_class);

static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req,

               struct ib_mad_agent_private *agent_priv);

static bool ib_mad_send_error(struct ib_mad_port_private *port_priv,

                  struct ib_wc *wc);

static void ib_mad_send_done(struct ib_cq *cq, struct ib_wc *wc);