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221 lines
6.4 KiB
221 lines
6.4 KiB
/* |
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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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rdma_destroy_ah(ah, RDMA_DESTROY_AH_SLEEPABLE); |
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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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rdma_destroy_ah(mad_send_wc->send_buf->ah, RDMA_DESTROY_AH_SLEEPABLE); |
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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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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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