| /* |
| * Copyright (c) 2004, 2005 Mellanox Technologies Ltd. All rights reserved. |
| * Copyright (c) 2004, 2005 Infinicon Corporation. All rights reserved. |
| * Copyright (c) 2004, 2005 Intel Corporation. All rights reserved. |
| * Copyright (c) 2004, 2005 Topspin Corporation. All rights reserved. |
| * Copyright (c) 2004-2007 Voltaire Corporation. All rights reserved. |
| * Copyright (c) 2005 Sun Microsystems, Inc. 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. |
| * |
| */ |
| |
| #include <linux/slab.h> |
| #include <linux/string.h> |
| |
| #include "agent.h" |
| #include "smi.h" |
| #include "mad_priv.h" |
| |
| #define SPFX "ib_agent: " |
| |
| struct ib_agent_port_private { |
| struct list_head port_list; |
| struct ib_mad_agent *agent[2]; |
| }; |
| |
| static DEFINE_SPINLOCK(ib_agent_port_list_lock); |
| static LIST_HEAD(ib_agent_port_list); |
| |
| static struct ib_agent_port_private * |
| __ib_get_agent_port(const struct ib_device *device, int port_num) |
| { |
| struct ib_agent_port_private *entry; |
| |
| list_for_each_entry(entry, &ib_agent_port_list, port_list) { |
| if (entry->agent[1]->device == device && |
| entry->agent[1]->port_num == port_num) |
| return entry; |
| } |
| return NULL; |
| } |
| |
| static struct ib_agent_port_private * |
| ib_get_agent_port(const struct ib_device *device, int port_num) |
| { |
| struct ib_agent_port_private *entry; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&ib_agent_port_list_lock, flags); |
| entry = __ib_get_agent_port(device, port_num); |
| spin_unlock_irqrestore(&ib_agent_port_list_lock, flags); |
| return entry; |
| } |
| |
| void agent_send_response(const struct ib_mad_hdr *mad_hdr, const struct ib_grh *grh, |
| const struct ib_wc *wc, const struct ib_device *device, |
| int port_num, int qpn, size_t resp_mad_len, bool opa) |
| { |
| struct ib_agent_port_private *port_priv; |
| struct ib_mad_agent *agent; |
| struct ib_mad_send_buf *send_buf; |
| struct ib_ah *ah; |
| struct ib_mad_send_wr_private *mad_send_wr; |
| |
| if (rdma_cap_ib_switch(device)) |
| port_priv = ib_get_agent_port(device, 0); |
| else |
| port_priv = ib_get_agent_port(device, port_num); |
| |
| if (!port_priv) { |
| dev_err(&device->dev, "Unable to find port agent\n"); |
| return; |
| } |
| |
| agent = port_priv->agent[qpn]; |
| ah = ib_create_ah_from_wc(agent->qp->pd, wc, grh, port_num); |
| if (IS_ERR(ah)) { |
| dev_err(&device->dev, "ib_create_ah_from_wc error %ld\n", |
| PTR_ERR(ah)); |
| return; |
| } |
| |
| if (opa && mad_hdr->base_version != OPA_MGMT_BASE_VERSION) |
| resp_mad_len = IB_MGMT_MAD_SIZE; |
| |
| send_buf = ib_create_send_mad(agent, wc->src_qp, wc->pkey_index, 0, |
| IB_MGMT_MAD_HDR, |
| resp_mad_len - IB_MGMT_MAD_HDR, |
| GFP_KERNEL, |
| mad_hdr->base_version); |
| if (IS_ERR(send_buf)) { |
| dev_err(&device->dev, "ib_create_send_mad error\n"); |
| goto err1; |
| } |
| |
| memcpy(send_buf->mad, mad_hdr, resp_mad_len); |
| send_buf->ah = ah; |
| |
| if (rdma_cap_ib_switch(device)) { |
| mad_send_wr = container_of(send_buf, |
| struct ib_mad_send_wr_private, |
| send_buf); |
| mad_send_wr->send_wr.port_num = port_num; |
| } |
| |
| if (ib_post_send_mad(send_buf, NULL)) { |
| dev_err(&device->dev, "ib_post_send_mad error\n"); |
| goto err2; |
| } |
| return; |
| err2: |
| ib_free_send_mad(send_buf); |
| err1: |
| ib_destroy_ah(ah); |
| } |
| |
| static void agent_send_handler(struct ib_mad_agent *mad_agent, |
| struct ib_mad_send_wc *mad_send_wc) |
| { |
| ib_destroy_ah(mad_send_wc->send_buf->ah); |
| ib_free_send_mad(mad_send_wc->send_buf); |
| } |
| |
| int ib_agent_port_open(struct ib_device *device, int port_num) |
| { |
| struct ib_agent_port_private *port_priv; |
| unsigned long flags; |
| int ret; |
| |
| /* Create new device info */ |
| port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL); |
| if (!port_priv) { |
| ret = -ENOMEM; |
| goto error1; |
| } |
| |
| if (rdma_cap_ib_smi(device, port_num)) { |
| /* Obtain send only MAD agent for SMI QP */ |
| port_priv->agent[0] = ib_register_mad_agent(device, port_num, |
| IB_QPT_SMI, NULL, 0, |
| &agent_send_handler, |
| NULL, NULL, 0); |
| if (IS_ERR(port_priv->agent[0])) { |
| ret = PTR_ERR(port_priv->agent[0]); |
| goto error2; |
| } |
| } |
| |
| /* Obtain send only MAD agent for GSI QP */ |
| port_priv->agent[1] = ib_register_mad_agent(device, port_num, |
| IB_QPT_GSI, NULL, 0, |
| &agent_send_handler, |
| NULL, NULL, 0); |
| if (IS_ERR(port_priv->agent[1])) { |
| ret = PTR_ERR(port_priv->agent[1]); |
| goto error3; |
| } |
| |
| spin_lock_irqsave(&ib_agent_port_list_lock, flags); |
| list_add_tail(&port_priv->port_list, &ib_agent_port_list); |
| spin_unlock_irqrestore(&ib_agent_port_list_lock, flags); |
| |
| return 0; |
| |
| error3: |
| if (port_priv->agent[0]) |
| ib_unregister_mad_agent(port_priv->agent[0]); |
| error2: |
| kfree(port_priv); |
| error1: |
| return ret; |
| } |
| |
| int ib_agent_port_close(struct ib_device *device, int port_num) |
| { |
| struct ib_agent_port_private *port_priv; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&ib_agent_port_list_lock, flags); |
| port_priv = __ib_get_agent_port(device, port_num); |
| if (port_priv == NULL) { |
| spin_unlock_irqrestore(&ib_agent_port_list_lock, flags); |
| dev_err(&device->dev, "Port %d not found\n", port_num); |
| return -ENODEV; |
| } |
| list_del(&port_priv->port_list); |
| spin_unlock_irqrestore(&ib_agent_port_list_lock, flags); |
| |
| ib_unregister_mad_agent(port_priv->agent[1]); |
| if (port_priv->agent[0]) |
| ib_unregister_mad_agent(port_priv->agent[0]); |
| |
| kfree(port_priv); |
| return 0; |
| } |