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![Gal Pressman](/assets/img/avatar_default.png)
Introduce a 'flags' field to destroy address handle callback and add a flag that marks whether the callback is executed in an atomic context or not. This will allow drivers to wait for completion instead of polling for it when it is allowed. Signed-off-by: Gal Pressman <galpress@amazon.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
221 lines
6.4 KiB
C
221 lines
6.4 KiB
C
/*
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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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