223 lines
6.4 KiB
C
223 lines
6.4 KiB
C
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/*
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* Copyright (c) 2004, 2005 Mellanox Technologies Ltd. All rights reserved.
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* Copyright (c) 2004, 2005 Infinicon Corporation. All rights reserved.
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* Copyright (c) 2004, 2005 Intel Corporation. All rights reserved.
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* Copyright (c) 2004, 2005 Topspin Corporation. All rights reserved.
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* Copyright (c) 2004-2007 Voltaire Corporation. All rights reserved.
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* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#include <linux/slab.h>
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#include <linux/string.h>
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#include "agent.h"
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#include "smi.h"
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#include "mad_priv.h"
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#define SPFX "ib_agent: "
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struct ib_agent_port_private {
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struct list_head port_list;
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struct ib_mad_agent *agent[2];
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};
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static DEFINE_SPINLOCK(ib_agent_port_list_lock);
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static LIST_HEAD(ib_agent_port_list);
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static struct ib_agent_port_private *
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__ib_get_agent_port(const struct ib_device *device, int port_num)
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{
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struct ib_agent_port_private *entry;
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list_for_each_entry(entry, &ib_agent_port_list, port_list) {
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if (entry->agent[1]->device == device &&
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entry->agent[1]->port_num == port_num)
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return entry;
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}
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return NULL;
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}
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static struct ib_agent_port_private *
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ib_get_agent_port(const struct ib_device *device, int port_num)
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{
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struct ib_agent_port_private *entry;
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unsigned long flags;
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spin_lock_irqsave(&ib_agent_port_list_lock, flags);
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entry = __ib_get_agent_port(device, port_num);
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spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
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return entry;
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}
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void agent_send_response(const struct ib_mad_hdr *mad_hdr, const struct ib_grh *grh,
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const struct ib_wc *wc, const struct ib_device *device,
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int port_num, int qpn, size_t resp_mad_len, bool opa)
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{
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struct ib_agent_port_private *port_priv;
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struct ib_mad_agent *agent;
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struct ib_mad_send_buf *send_buf;
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struct ib_ah *ah;
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struct ib_mad_send_wr_private *mad_send_wr;
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if (rdma_cap_ib_switch(device))
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port_priv = ib_get_agent_port(device, 0);
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else
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port_priv = ib_get_agent_port(device, port_num);
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if (!port_priv) {
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dev_err(&device->dev, "Unable to find port agent\n");
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return;
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}
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agent = port_priv->agent[qpn];
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ah = ib_create_ah_from_wc(agent->qp->pd, wc, grh, port_num);
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if (IS_ERR(ah)) {
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dev_err(&device->dev, "ib_create_ah_from_wc error %ld\n",
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PTR_ERR(ah));
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return;
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}
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if (opa && mad_hdr->base_version != OPA_MGMT_BASE_VERSION)
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resp_mad_len = IB_MGMT_MAD_SIZE;
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send_buf = ib_create_send_mad(agent, wc->src_qp, wc->pkey_index, 0,
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IB_MGMT_MAD_HDR,
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resp_mad_len - IB_MGMT_MAD_HDR,
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GFP_KERNEL,
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mad_hdr->base_version);
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if (IS_ERR(send_buf)) {
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dev_err(&device->dev, "ib_create_send_mad error\n");
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goto err1;
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}
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memcpy(send_buf->mad, mad_hdr, resp_mad_len);
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send_buf->ah = ah;
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if (rdma_cap_ib_switch(device)) {
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mad_send_wr = container_of(send_buf,
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struct ib_mad_send_wr_private,
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send_buf);
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mad_send_wr->send_wr.port_num = port_num;
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}
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if (ib_post_send_mad(send_buf, NULL)) {
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dev_err(&device->dev, "ib_post_send_mad error\n");
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goto err2;
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}
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return;
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err2:
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ib_free_send_mad(send_buf);
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err1:
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ib_destroy_ah(ah);
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}
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static void agent_send_handler(struct ib_mad_agent *mad_agent,
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struct ib_mad_send_wc *mad_send_wc)
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{
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ib_destroy_ah(mad_send_wc->send_buf->ah);
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ib_free_send_mad(mad_send_wc->send_buf);
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}
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int ib_agent_port_open(struct ib_device *device, int port_num)
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{
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struct ib_agent_port_private *port_priv;
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unsigned long flags;
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int ret;
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/* Create new device info */
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port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL);
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if (!port_priv) {
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dev_err(&device->dev, "No memory for ib_agent_port_private\n");
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ret = -ENOMEM;
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goto error1;
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}
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if (rdma_cap_ib_smi(device, port_num)) {
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/* Obtain send only MAD agent for SMI QP */
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port_priv->agent[0] = ib_register_mad_agent(device, port_num,
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IB_QPT_SMI, NULL, 0,
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&agent_send_handler,
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NULL, NULL, 0);
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if (IS_ERR(port_priv->agent[0])) {
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ret = PTR_ERR(port_priv->agent[0]);
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goto error2;
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}
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}
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/* Obtain send only MAD agent for GSI QP */
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port_priv->agent[1] = ib_register_mad_agent(device, port_num,
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IB_QPT_GSI, NULL, 0,
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&agent_send_handler,
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NULL, NULL, 0);
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if (IS_ERR(port_priv->agent[1])) {
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ret = PTR_ERR(port_priv->agent[1]);
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goto error3;
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}
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spin_lock_irqsave(&ib_agent_port_list_lock, flags);
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list_add_tail(&port_priv->port_list, &ib_agent_port_list);
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spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
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return 0;
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error3:
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if (port_priv->agent[0])
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ib_unregister_mad_agent(port_priv->agent[0]);
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error2:
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kfree(port_priv);
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error1:
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return ret;
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}
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int ib_agent_port_close(struct ib_device *device, int port_num)
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{
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struct ib_agent_port_private *port_priv;
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unsigned long flags;
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spin_lock_irqsave(&ib_agent_port_list_lock, flags);
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port_priv = __ib_get_agent_port(device, port_num);
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if (port_priv == NULL) {
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spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
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dev_err(&device->dev, "Port %d not found\n", port_num);
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return -ENODEV;
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}
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list_del(&port_priv->port_list);
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spin_unlock_irqrestore(&ib_agent_port_list_lock, flags);
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ib_unregister_mad_agent(port_priv->agent[1]);
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if (port_priv->agent[0])
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ib_unregister_mad_agent(port_priv->agent[0]);
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kfree(port_priv);
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return 0;
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}
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