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3171 lines
88 KiB
3171 lines
88 KiB
/* |
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* Copyright (c) 2004-2007 Voltaire, Inc. All rights reserved. |
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* Copyright (c) 2005 Intel Corporation. All rights reserved. |
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* Copyright (c) 2005 Mellanox Technologies Ltd. All rights reserved. |
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* Copyright (c) 2009 HNR Consulting. All rights reserved. |
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* Copyright (c) 2014,2018 Intel Corporation. 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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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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|
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#include <linux/dma-mapping.h> |
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#include <linux/slab.h> |
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#include <linux/module.h> |
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#include <linux/security.h> |
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#include <linux/xarray.h> |
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#include <rdma/ib_cache.h> |
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|
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#include "mad_priv.h" |
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#include "core_priv.h" |
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#include "mad_rmpp.h" |
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#include "smi.h" |
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#include "opa_smi.h" |
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#include "agent.h" |
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|
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#define CREATE_TRACE_POINTS |
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#include <trace/events/ib_mad.h> |
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|
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#ifdef CONFIG_TRACEPOINTS |
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static void create_mad_addr_info(struct ib_mad_send_wr_private *mad_send_wr, |
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struct ib_mad_qp_info *qp_info, |
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struct trace_event_raw_ib_mad_send_template *entry) |
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{ |
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u16 pkey; |
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struct ib_device *dev = qp_info->port_priv->device; |
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u8 pnum = qp_info->port_priv->port_num; |
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struct ib_ud_wr *wr = &mad_send_wr->send_wr; |
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struct rdma_ah_attr attr = {}; |
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|
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rdma_query_ah(wr->ah, &attr); |
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|
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/* These are common */ |
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entry->sl = attr.sl; |
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ib_query_pkey(dev, pnum, wr->pkey_index, &pkey); |
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entry->pkey = pkey; |
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entry->rqpn = wr->remote_qpn; |
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entry->rqkey = wr->remote_qkey; |
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entry->dlid = rdma_ah_get_dlid(&attr); |
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} |
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#endif |
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|
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static int mad_sendq_size = IB_MAD_QP_SEND_SIZE; |
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static int mad_recvq_size = IB_MAD_QP_RECV_SIZE; |
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|
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module_param_named(send_queue_size, mad_sendq_size, int, 0444); |
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MODULE_PARM_DESC(send_queue_size, "Size of send queue in number of work requests"); |
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module_param_named(recv_queue_size, mad_recvq_size, int, 0444); |
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MODULE_PARM_DESC(recv_queue_size, "Size of receive queue in number of work requests"); |
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|
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static DEFINE_XARRAY_ALLOC1(ib_mad_clients); |
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static u32 ib_mad_client_next; |
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static struct list_head ib_mad_port_list; |
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|
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/* Port list lock */ |
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static DEFINE_SPINLOCK(ib_mad_port_list_lock); |
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|
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/* Forward declarations */ |
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static int method_in_use(struct ib_mad_mgmt_method_table **method, |
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struct ib_mad_reg_req *mad_reg_req); |
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static void remove_mad_reg_req(struct ib_mad_agent_private *priv); |
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static struct ib_mad_agent_private *find_mad_agent( |
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struct ib_mad_port_private *port_priv, |
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const struct ib_mad_hdr *mad); |
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static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, |
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struct ib_mad_private *mad); |
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static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv); |
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static void timeout_sends(struct work_struct *work); |
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static void local_completions(struct work_struct *work); |
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static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
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struct ib_mad_agent_private *agent_priv, |
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u8 mgmt_class); |
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static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
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struct ib_mad_agent_private *agent_priv); |
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static bool ib_mad_send_error(struct ib_mad_port_private *port_priv, |
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struct ib_wc *wc); |
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static void ib_mad_send_done(struct ib_cq *cq, struct ib_wc *wc); |
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|
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/* |
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* Returns a ib_mad_port_private structure or NULL for a device/port |
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* Assumes ib_mad_port_list_lock is being held |
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*/ |
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static inline struct ib_mad_port_private * |
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__ib_get_mad_port(struct ib_device *device, int port_num) |
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{ |
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struct ib_mad_port_private *entry; |
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|
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list_for_each_entry(entry, &ib_mad_port_list, port_list) { |
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if (entry->device == device && entry->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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|
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/* |
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* Wrapper function to return a ib_mad_port_private structure or NULL |
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* for a device/port |
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*/ |
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static inline struct ib_mad_port_private * |
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ib_get_mad_port(struct ib_device *device, int port_num) |
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{ |
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struct ib_mad_port_private *entry; |
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unsigned long flags; |
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|
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spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
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entry = __ib_get_mad_port(device, port_num); |
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spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
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|
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return entry; |
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} |
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|
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static inline u8 convert_mgmt_class(u8 mgmt_class) |
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{ |
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/* Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0 */ |
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return mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ? |
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0 : mgmt_class; |
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} |
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|
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static int get_spl_qp_index(enum ib_qp_type qp_type) |
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{ |
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switch (qp_type) |
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{ |
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case IB_QPT_SMI: |
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return 0; |
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case IB_QPT_GSI: |
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return 1; |
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default: |
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return -1; |
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} |
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} |
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|
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static int vendor_class_index(u8 mgmt_class) |
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{ |
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return mgmt_class - IB_MGMT_CLASS_VENDOR_RANGE2_START; |
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} |
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|
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static int is_vendor_class(u8 mgmt_class) |
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{ |
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if ((mgmt_class < IB_MGMT_CLASS_VENDOR_RANGE2_START) || |
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(mgmt_class > IB_MGMT_CLASS_VENDOR_RANGE2_END)) |
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return 0; |
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return 1; |
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} |
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|
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static int is_vendor_oui(char *oui) |
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{ |
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if (oui[0] || oui[1] || oui[2]) |
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return 1; |
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return 0; |
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} |
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|
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static int is_vendor_method_in_use( |
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struct ib_mad_mgmt_vendor_class *vendor_class, |
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struct ib_mad_reg_req *mad_reg_req) |
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{ |
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struct ib_mad_mgmt_method_table *method; |
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int i; |
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|
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for (i = 0; i < MAX_MGMT_OUI; i++) { |
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if (!memcmp(vendor_class->oui[i], mad_reg_req->oui, 3)) { |
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method = vendor_class->method_table[i]; |
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if (method) { |
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if (method_in_use(&method, mad_reg_req)) |
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return 1; |
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else |
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break; |
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} |
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} |
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} |
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return 0; |
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} |
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|
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int ib_response_mad(const struct ib_mad_hdr *hdr) |
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{ |
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return ((hdr->method & IB_MGMT_METHOD_RESP) || |
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(hdr->method == IB_MGMT_METHOD_TRAP_REPRESS) || |
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((hdr->mgmt_class == IB_MGMT_CLASS_BM) && |
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(hdr->attr_mod & IB_BM_ATTR_MOD_RESP))); |
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} |
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EXPORT_SYMBOL(ib_response_mad); |
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|
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/* |
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* ib_register_mad_agent - Register to send/receive MADs |
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* |
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* Context: Process context. |
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*/ |
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struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device, |
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u8 port_num, |
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enum ib_qp_type qp_type, |
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struct ib_mad_reg_req *mad_reg_req, |
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u8 rmpp_version, |
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ib_mad_send_handler send_handler, |
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ib_mad_recv_handler recv_handler, |
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void *context, |
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u32 registration_flags) |
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{ |
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struct ib_mad_port_private *port_priv; |
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struct ib_mad_agent *ret = ERR_PTR(-EINVAL); |
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struct ib_mad_agent_private *mad_agent_priv; |
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struct ib_mad_reg_req *reg_req = NULL; |
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struct ib_mad_mgmt_class_table *class; |
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struct ib_mad_mgmt_vendor_class_table *vendor; |
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struct ib_mad_mgmt_vendor_class *vendor_class; |
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struct ib_mad_mgmt_method_table *method; |
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int ret2, qpn; |
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u8 mgmt_class, vclass; |
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|
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if ((qp_type == IB_QPT_SMI && !rdma_cap_ib_smi(device, port_num)) || |
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(qp_type == IB_QPT_GSI && !rdma_cap_ib_cm(device, port_num))) |
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return ERR_PTR(-EPROTONOSUPPORT); |
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|
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/* Validate parameters */ |
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qpn = get_spl_qp_index(qp_type); |
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if (qpn == -1) { |
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dev_dbg_ratelimited(&device->dev, "%s: invalid QP Type %d\n", |
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__func__, qp_type); |
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goto error1; |
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} |
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|
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if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION) { |
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dev_dbg_ratelimited(&device->dev, |
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"%s: invalid RMPP Version %u\n", |
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__func__, rmpp_version); |
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goto error1; |
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} |
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|
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/* Validate MAD registration request if supplied */ |
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if (mad_reg_req) { |
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if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION) { |
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dev_dbg_ratelimited(&device->dev, |
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"%s: invalid Class Version %u\n", |
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__func__, |
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mad_reg_req->mgmt_class_version); |
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goto error1; |
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} |
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if (!recv_handler) { |
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dev_dbg_ratelimited(&device->dev, |
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"%s: no recv_handler\n", __func__); |
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goto error1; |
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} |
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if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) { |
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/* |
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* IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only |
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* one in this range currently allowed |
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*/ |
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if (mad_reg_req->mgmt_class != |
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IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { |
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dev_dbg_ratelimited(&device->dev, |
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"%s: Invalid Mgmt Class 0x%x\n", |
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__func__, mad_reg_req->mgmt_class); |
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goto error1; |
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} |
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} else if (mad_reg_req->mgmt_class == 0) { |
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/* |
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* Class 0 is reserved in IBA and is used for |
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* aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE |
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*/ |
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dev_dbg_ratelimited(&device->dev, |
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"%s: Invalid Mgmt Class 0\n", |
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__func__); |
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goto error1; |
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} else if (is_vendor_class(mad_reg_req->mgmt_class)) { |
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/* |
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* If class is in "new" vendor range, |
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* ensure supplied OUI is not zero |
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*/ |
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if (!is_vendor_oui(mad_reg_req->oui)) { |
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dev_dbg_ratelimited(&device->dev, |
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"%s: No OUI specified for class 0x%x\n", |
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__func__, |
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mad_reg_req->mgmt_class); |
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goto error1; |
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} |
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} |
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/* Make sure class supplied is consistent with RMPP */ |
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if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) { |
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if (rmpp_version) { |
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dev_dbg_ratelimited(&device->dev, |
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"%s: RMPP version for non-RMPP class 0x%x\n", |
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__func__, mad_reg_req->mgmt_class); |
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goto error1; |
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} |
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} |
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|
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/* Make sure class supplied is consistent with QP type */ |
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if (qp_type == IB_QPT_SMI) { |
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if ((mad_reg_req->mgmt_class != |
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IB_MGMT_CLASS_SUBN_LID_ROUTED) && |
|
(mad_reg_req->mgmt_class != |
|
IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { |
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dev_dbg_ratelimited(&device->dev, |
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"%s: Invalid SM QP type: class 0x%x\n", |
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__func__, mad_reg_req->mgmt_class); |
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goto error1; |
|
} |
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} else { |
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if ((mad_reg_req->mgmt_class == |
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IB_MGMT_CLASS_SUBN_LID_ROUTED) || |
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(mad_reg_req->mgmt_class == |
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IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { |
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dev_dbg_ratelimited(&device->dev, |
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"%s: Invalid GS QP type: class 0x%x\n", |
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__func__, mad_reg_req->mgmt_class); |
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goto error1; |
|
} |
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} |
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} else { |
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/* No registration request supplied */ |
|
if (!send_handler) |
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goto error1; |
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if (registration_flags & IB_MAD_USER_RMPP) |
|
goto error1; |
|
} |
|
|
|
/* Validate device and port */ |
|
port_priv = ib_get_mad_port(device, port_num); |
|
if (!port_priv) { |
|
dev_dbg_ratelimited(&device->dev, "%s: Invalid port %d\n", |
|
__func__, port_num); |
|
ret = ERR_PTR(-ENODEV); |
|
goto error1; |
|
} |
|
|
|
/* Verify the QP requested is supported. For example, Ethernet devices |
|
* will not have QP0. |
|
*/ |
|
if (!port_priv->qp_info[qpn].qp) { |
|
dev_dbg_ratelimited(&device->dev, "%s: QP %d not supported\n", |
|
__func__, qpn); |
|
ret = ERR_PTR(-EPROTONOSUPPORT); |
|
goto error1; |
|
} |
|
|
|
/* Allocate structures */ |
|
mad_agent_priv = kzalloc(sizeof *mad_agent_priv, GFP_KERNEL); |
|
if (!mad_agent_priv) { |
|
ret = ERR_PTR(-ENOMEM); |
|
goto error1; |
|
} |
|
|
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if (mad_reg_req) { |
|
reg_req = kmemdup(mad_reg_req, sizeof *reg_req, GFP_KERNEL); |
|
if (!reg_req) { |
|
ret = ERR_PTR(-ENOMEM); |
|
goto error3; |
|
} |
|
} |
|
|
|
/* Now, fill in the various structures */ |
|
mad_agent_priv->qp_info = &port_priv->qp_info[qpn]; |
|
mad_agent_priv->reg_req = reg_req; |
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mad_agent_priv->agent.rmpp_version = rmpp_version; |
|
mad_agent_priv->agent.device = device; |
|
mad_agent_priv->agent.recv_handler = recv_handler; |
|
mad_agent_priv->agent.send_handler = send_handler; |
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mad_agent_priv->agent.context = context; |
|
mad_agent_priv->agent.qp = port_priv->qp_info[qpn].qp; |
|
mad_agent_priv->agent.port_num = port_num; |
|
mad_agent_priv->agent.flags = registration_flags; |
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spin_lock_init(&mad_agent_priv->lock); |
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INIT_LIST_HEAD(&mad_agent_priv->send_list); |
|
INIT_LIST_HEAD(&mad_agent_priv->wait_list); |
|
INIT_LIST_HEAD(&mad_agent_priv->done_list); |
|
INIT_LIST_HEAD(&mad_agent_priv->rmpp_list); |
|
INIT_DELAYED_WORK(&mad_agent_priv->timed_work, timeout_sends); |
|
INIT_LIST_HEAD(&mad_agent_priv->local_list); |
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INIT_WORK(&mad_agent_priv->local_work, local_completions); |
|
refcount_set(&mad_agent_priv->refcount, 1); |
|
init_completion(&mad_agent_priv->comp); |
|
|
|
ret2 = ib_mad_agent_security_setup(&mad_agent_priv->agent, qp_type); |
|
if (ret2) { |
|
ret = ERR_PTR(ret2); |
|
goto error4; |
|
} |
|
|
|
/* |
|
* The mlx4 driver uses the top byte to distinguish which virtual |
|
* function generated the MAD, so we must avoid using it. |
|
*/ |
|
ret2 = xa_alloc_cyclic(&ib_mad_clients, &mad_agent_priv->agent.hi_tid, |
|
mad_agent_priv, XA_LIMIT(0, (1 << 24) - 1), |
|
&ib_mad_client_next, GFP_KERNEL); |
|
if (ret2 < 0) { |
|
ret = ERR_PTR(ret2); |
|
goto error5; |
|
} |
|
|
|
/* |
|
* Make sure MAD registration (if supplied) |
|
* is non overlapping with any existing ones |
|
*/ |
|
spin_lock_irq(&port_priv->reg_lock); |
|
if (mad_reg_req) { |
|
mgmt_class = convert_mgmt_class(mad_reg_req->mgmt_class); |
|
if (!is_vendor_class(mgmt_class)) { |
|
class = port_priv->version[mad_reg_req-> |
|
mgmt_class_version].class; |
|
if (class) { |
|
method = class->method_table[mgmt_class]; |
|
if (method) { |
|
if (method_in_use(&method, |
|
mad_reg_req)) |
|
goto error6; |
|
} |
|
} |
|
ret2 = add_nonoui_reg_req(mad_reg_req, mad_agent_priv, |
|
mgmt_class); |
|
} else { |
|
/* "New" vendor class range */ |
|
vendor = port_priv->version[mad_reg_req-> |
|
mgmt_class_version].vendor; |
|
if (vendor) { |
|
vclass = vendor_class_index(mgmt_class); |
|
vendor_class = vendor->vendor_class[vclass]; |
|
if (vendor_class) { |
|
if (is_vendor_method_in_use( |
|
vendor_class, |
|
mad_reg_req)) |
|
goto error6; |
|
} |
|
} |
|
ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv); |
|
} |
|
if (ret2) { |
|
ret = ERR_PTR(ret2); |
|
goto error6; |
|
} |
|
} |
|
spin_unlock_irq(&port_priv->reg_lock); |
|
|
|
trace_ib_mad_create_agent(mad_agent_priv); |
|
return &mad_agent_priv->agent; |
|
error6: |
|
spin_unlock_irq(&port_priv->reg_lock); |
|
xa_erase(&ib_mad_clients, mad_agent_priv->agent.hi_tid); |
|
error5: |
|
ib_mad_agent_security_cleanup(&mad_agent_priv->agent); |
|
error4: |
|
kfree(reg_req); |
|
error3: |
|
kfree(mad_agent_priv); |
|
error1: |
|
return ret; |
|
} |
|
EXPORT_SYMBOL(ib_register_mad_agent); |
|
|
|
static inline void deref_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
|
{ |
|
if (refcount_dec_and_test(&mad_agent_priv->refcount)) |
|
complete(&mad_agent_priv->comp); |
|
} |
|
|
|
static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
|
{ |
|
struct ib_mad_port_private *port_priv; |
|
|
|
/* Note that we could still be handling received MADs */ |
|
trace_ib_mad_unregister_agent(mad_agent_priv); |
|
|
|
/* |
|
* Canceling all sends results in dropping received response |
|
* MADs, preventing us from queuing additional work |
|
*/ |
|
cancel_mads(mad_agent_priv); |
|
port_priv = mad_agent_priv->qp_info->port_priv; |
|
cancel_delayed_work(&mad_agent_priv->timed_work); |
|
|
|
spin_lock_irq(&port_priv->reg_lock); |
|
remove_mad_reg_req(mad_agent_priv); |
|
spin_unlock_irq(&port_priv->reg_lock); |
|
xa_erase(&ib_mad_clients, mad_agent_priv->agent.hi_tid); |
|
|
|
flush_workqueue(port_priv->wq); |
|
|
|
deref_mad_agent(mad_agent_priv); |
|
wait_for_completion(&mad_agent_priv->comp); |
|
ib_cancel_rmpp_recvs(mad_agent_priv); |
|
|
|
ib_mad_agent_security_cleanup(&mad_agent_priv->agent); |
|
|
|
kfree(mad_agent_priv->reg_req); |
|
kfree_rcu(mad_agent_priv, rcu); |
|
} |
|
|
|
/* |
|
* ib_unregister_mad_agent - Unregisters a client from using MAD services |
|
* |
|
* Context: Process context. |
|
*/ |
|
void ib_unregister_mad_agent(struct ib_mad_agent *mad_agent) |
|
{ |
|
struct ib_mad_agent_private *mad_agent_priv; |
|
|
|
mad_agent_priv = container_of(mad_agent, |
|
struct ib_mad_agent_private, |
|
agent); |
|
unregister_mad_agent(mad_agent_priv); |
|
} |
|
EXPORT_SYMBOL(ib_unregister_mad_agent); |
|
|
|
static void dequeue_mad(struct ib_mad_list_head *mad_list) |
|
{ |
|
struct ib_mad_queue *mad_queue; |
|
unsigned long flags; |
|
|
|
mad_queue = mad_list->mad_queue; |
|
spin_lock_irqsave(&mad_queue->lock, flags); |
|
list_del(&mad_list->list); |
|
mad_queue->count--; |
|
spin_unlock_irqrestore(&mad_queue->lock, flags); |
|
} |
|
|
|
static void build_smp_wc(struct ib_qp *qp, struct ib_cqe *cqe, u16 slid, |
|
u16 pkey_index, u8 port_num, struct ib_wc *wc) |
|
{ |
|
memset(wc, 0, sizeof *wc); |
|
wc->wr_cqe = cqe; |
|
wc->status = IB_WC_SUCCESS; |
|
wc->opcode = IB_WC_RECV; |
|
wc->pkey_index = pkey_index; |
|
wc->byte_len = sizeof(struct ib_mad) + sizeof(struct ib_grh); |
|
wc->src_qp = IB_QP0; |
|
wc->qp = qp; |
|
wc->slid = slid; |
|
wc->sl = 0; |
|
wc->dlid_path_bits = 0; |
|
wc->port_num = port_num; |
|
} |
|
|
|
static size_t mad_priv_size(const struct ib_mad_private *mp) |
|
{ |
|
return sizeof(struct ib_mad_private) + mp->mad_size; |
|
} |
|
|
|
static struct ib_mad_private *alloc_mad_private(size_t mad_size, gfp_t flags) |
|
{ |
|
size_t size = sizeof(struct ib_mad_private) + mad_size; |
|
struct ib_mad_private *ret = kzalloc(size, flags); |
|
|
|
if (ret) |
|
ret->mad_size = mad_size; |
|
|
|
return ret; |
|
} |
|
|
|
static size_t port_mad_size(const struct ib_mad_port_private *port_priv) |
|
{ |
|
return rdma_max_mad_size(port_priv->device, port_priv->port_num); |
|
} |
|
|
|
static size_t mad_priv_dma_size(const struct ib_mad_private *mp) |
|
{ |
|
return sizeof(struct ib_grh) + mp->mad_size; |
|
} |
|
|
|
/* |
|
* Return 0 if SMP is to be sent |
|
* Return 1 if SMP was consumed locally (whether or not solicited) |
|
* Return < 0 if error |
|
*/ |
|
static int handle_outgoing_dr_smp(struct ib_mad_agent_private *mad_agent_priv, |
|
struct ib_mad_send_wr_private *mad_send_wr) |
|
{ |
|
int ret = 0; |
|
struct ib_smp *smp = mad_send_wr->send_buf.mad; |
|
struct opa_smp *opa_smp = (struct opa_smp *)smp; |
|
unsigned long flags; |
|
struct ib_mad_local_private *local; |
|
struct ib_mad_private *mad_priv; |
|
struct ib_mad_port_private *port_priv; |
|
struct ib_mad_agent_private *recv_mad_agent = NULL; |
|
struct ib_device *device = mad_agent_priv->agent.device; |
|
u8 port_num; |
|
struct ib_wc mad_wc; |
|
struct ib_ud_wr *send_wr = &mad_send_wr->send_wr; |
|
size_t mad_size = port_mad_size(mad_agent_priv->qp_info->port_priv); |
|
u16 out_mad_pkey_index = 0; |
|
u16 drslid; |
|
bool opa = rdma_cap_opa_mad(mad_agent_priv->qp_info->port_priv->device, |
|
mad_agent_priv->qp_info->port_priv->port_num); |
|
|
|
if (rdma_cap_ib_switch(device) && |
|
smp->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) |
|
port_num = send_wr->port_num; |
|
else |
|
port_num = mad_agent_priv->agent.port_num; |
|
|
|
/* |
|
* Directed route handling starts if the initial LID routed part of |
|
* a request or the ending LID routed part of a response is empty. |
|
* If we are at the start of the LID routed part, don't update the |
|
* hop_ptr or hop_cnt. See section 14.2.2, Vol 1 IB spec. |
|
*/ |
|
if (opa && smp->class_version == OPA_SM_CLASS_VERSION) { |
|
u32 opa_drslid; |
|
|
|
trace_ib_mad_handle_out_opa_smi(opa_smp); |
|
|
|
if ((opa_get_smp_direction(opa_smp) |
|
? opa_smp->route.dr.dr_dlid : opa_smp->route.dr.dr_slid) == |
|
OPA_LID_PERMISSIVE && |
|
opa_smi_handle_dr_smp_send(opa_smp, |
|
rdma_cap_ib_switch(device), |
|
port_num) == IB_SMI_DISCARD) { |
|
ret = -EINVAL; |
|
dev_err(&device->dev, "OPA Invalid directed route\n"); |
|
goto out; |
|
} |
|
opa_drslid = be32_to_cpu(opa_smp->route.dr.dr_slid); |
|
if (opa_drslid != be32_to_cpu(OPA_LID_PERMISSIVE) && |
|
opa_drslid & 0xffff0000) { |
|
ret = -EINVAL; |
|
dev_err(&device->dev, "OPA Invalid dr_slid 0x%x\n", |
|
opa_drslid); |
|
goto out; |
|
} |
|
drslid = (u16)(opa_drslid & 0x0000ffff); |
|
|
|
/* Check to post send on QP or process locally */ |
|
if (opa_smi_check_local_smp(opa_smp, device) == IB_SMI_DISCARD && |
|
opa_smi_check_local_returning_smp(opa_smp, device) == IB_SMI_DISCARD) |
|
goto out; |
|
} else { |
|
trace_ib_mad_handle_out_ib_smi(smp); |
|
|
|
if ((ib_get_smp_direction(smp) ? smp->dr_dlid : smp->dr_slid) == |
|
IB_LID_PERMISSIVE && |
|
smi_handle_dr_smp_send(smp, rdma_cap_ib_switch(device), port_num) == |
|
IB_SMI_DISCARD) { |
|
ret = -EINVAL; |
|
dev_err(&device->dev, "Invalid directed route\n"); |
|
goto out; |
|
} |
|
drslid = be16_to_cpu(smp->dr_slid); |
|
|
|
/* Check to post send on QP or process locally */ |
|
if (smi_check_local_smp(smp, device) == IB_SMI_DISCARD && |
|
smi_check_local_returning_smp(smp, device) == IB_SMI_DISCARD) |
|
goto out; |
|
} |
|
|
|
local = kmalloc(sizeof *local, GFP_ATOMIC); |
|
if (!local) { |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
local->mad_priv = NULL; |
|
local->recv_mad_agent = NULL; |
|
mad_priv = alloc_mad_private(mad_size, GFP_ATOMIC); |
|
if (!mad_priv) { |
|
ret = -ENOMEM; |
|
kfree(local); |
|
goto out; |
|
} |
|
|
|
build_smp_wc(mad_agent_priv->agent.qp, |
|
send_wr->wr.wr_cqe, drslid, |
|
send_wr->pkey_index, |
|
send_wr->port_num, &mad_wc); |
|
|
|
if (opa && smp->base_version == OPA_MGMT_BASE_VERSION) { |
|
mad_wc.byte_len = mad_send_wr->send_buf.hdr_len |
|
+ mad_send_wr->send_buf.data_len |
|
+ sizeof(struct ib_grh); |
|
} |
|
|
|
/* No GRH for DR SMP */ |
|
ret = device->ops.process_mad(device, 0, port_num, &mad_wc, NULL, |
|
(const struct ib_mad *)smp, |
|
(struct ib_mad *)mad_priv->mad, &mad_size, |
|
&out_mad_pkey_index); |
|
switch (ret) |
|
{ |
|
case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_REPLY: |
|
if (ib_response_mad((const struct ib_mad_hdr *)mad_priv->mad) && |
|
mad_agent_priv->agent.recv_handler) { |
|
local->mad_priv = mad_priv; |
|
local->recv_mad_agent = mad_agent_priv; |
|
/* |
|
* Reference MAD agent until receive |
|
* side of local completion handled |
|
*/ |
|
refcount_inc(&mad_agent_priv->refcount); |
|
} else |
|
kfree(mad_priv); |
|
break; |
|
case IB_MAD_RESULT_SUCCESS | IB_MAD_RESULT_CONSUMED: |
|
kfree(mad_priv); |
|
break; |
|
case IB_MAD_RESULT_SUCCESS: |
|
/* Treat like an incoming receive MAD */ |
|
port_priv = ib_get_mad_port(mad_agent_priv->agent.device, |
|
mad_agent_priv->agent.port_num); |
|
if (port_priv) { |
|
memcpy(mad_priv->mad, smp, mad_priv->mad_size); |
|
recv_mad_agent = find_mad_agent(port_priv, |
|
(const struct ib_mad_hdr *)mad_priv->mad); |
|
} |
|
if (!port_priv || !recv_mad_agent) { |
|
/* |
|
* No receiving agent so drop packet and |
|
* generate send completion. |
|
*/ |
|
kfree(mad_priv); |
|
break; |
|
} |
|
local->mad_priv = mad_priv; |
|
local->recv_mad_agent = recv_mad_agent; |
|
break; |
|
default: |
|
kfree(mad_priv); |
|
kfree(local); |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
|
|
local->mad_send_wr = mad_send_wr; |
|
if (opa) { |
|
local->mad_send_wr->send_wr.pkey_index = out_mad_pkey_index; |
|
local->return_wc_byte_len = mad_size; |
|
} |
|
/* Reference MAD agent until send side of local completion handled */ |
|
refcount_inc(&mad_agent_priv->refcount); |
|
/* Queue local completion to local list */ |
|
spin_lock_irqsave(&mad_agent_priv->lock, flags); |
|
list_add_tail(&local->completion_list, &mad_agent_priv->local_list); |
|
spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
|
queue_work(mad_agent_priv->qp_info->port_priv->wq, |
|
&mad_agent_priv->local_work); |
|
ret = 1; |
|
out: |
|
return ret; |
|
} |
|
|
|
static int get_pad_size(int hdr_len, int data_len, size_t mad_size) |
|
{ |
|
int seg_size, pad; |
|
|
|
seg_size = mad_size - hdr_len; |
|
if (data_len && seg_size) { |
|
pad = seg_size - data_len % seg_size; |
|
return pad == seg_size ? 0 : pad; |
|
} else |
|
return seg_size; |
|
} |
|
|
|
static void free_send_rmpp_list(struct ib_mad_send_wr_private *mad_send_wr) |
|
{ |
|
struct ib_rmpp_segment *s, *t; |
|
|
|
list_for_each_entry_safe(s, t, &mad_send_wr->rmpp_list, list) { |
|
list_del(&s->list); |
|
kfree(s); |
|
} |
|
} |
|
|
|
static int alloc_send_rmpp_list(struct ib_mad_send_wr_private *send_wr, |
|
size_t mad_size, gfp_t gfp_mask) |
|
{ |
|
struct ib_mad_send_buf *send_buf = &send_wr->send_buf; |
|
struct ib_rmpp_mad *rmpp_mad = send_buf->mad; |
|
struct ib_rmpp_segment *seg = NULL; |
|
int left, seg_size, pad; |
|
|
|
send_buf->seg_size = mad_size - send_buf->hdr_len; |
|
send_buf->seg_rmpp_size = mad_size - IB_MGMT_RMPP_HDR; |
|
seg_size = send_buf->seg_size; |
|
pad = send_wr->pad; |
|
|
|
/* Allocate data segments. */ |
|
for (left = send_buf->data_len + pad; left > 0; left -= seg_size) { |
|
seg = kmalloc(sizeof (*seg) + seg_size, gfp_mask); |
|
if (!seg) { |
|
free_send_rmpp_list(send_wr); |
|
return -ENOMEM; |
|
} |
|
seg->num = ++send_buf->seg_count; |
|
list_add_tail(&seg->list, &send_wr->rmpp_list); |
|
} |
|
|
|
/* Zero any padding */ |
|
if (pad) |
|
memset(seg->data + seg_size - pad, 0, pad); |
|
|
|
rmpp_mad->rmpp_hdr.rmpp_version = send_wr->mad_agent_priv-> |
|
agent.rmpp_version; |
|
rmpp_mad->rmpp_hdr.rmpp_type = IB_MGMT_RMPP_TYPE_DATA; |
|
ib_set_rmpp_flags(&rmpp_mad->rmpp_hdr, IB_MGMT_RMPP_FLAG_ACTIVE); |
|
|
|
send_wr->cur_seg = container_of(send_wr->rmpp_list.next, |
|
struct ib_rmpp_segment, list); |
|
send_wr->last_ack_seg = send_wr->cur_seg; |
|
return 0; |
|
} |
|
|
|
int ib_mad_kernel_rmpp_agent(const struct ib_mad_agent *agent) |
|
{ |
|
return agent->rmpp_version && !(agent->flags & IB_MAD_USER_RMPP); |
|
} |
|
EXPORT_SYMBOL(ib_mad_kernel_rmpp_agent); |
|
|
|
struct ib_mad_send_buf * ib_create_send_mad(struct ib_mad_agent *mad_agent, |
|
u32 remote_qpn, u16 pkey_index, |
|
int rmpp_active, |
|
int hdr_len, int data_len, |
|
gfp_t gfp_mask, |
|
u8 base_version) |
|
{ |
|
struct ib_mad_agent_private *mad_agent_priv; |
|
struct ib_mad_send_wr_private *mad_send_wr; |
|
int pad, message_size, ret, size; |
|
void *buf; |
|
size_t mad_size; |
|
bool opa; |
|
|
|
mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, |
|
agent); |
|
|
|
opa = rdma_cap_opa_mad(mad_agent->device, mad_agent->port_num); |
|
|
|
if (opa && base_version == OPA_MGMT_BASE_VERSION) |
|
mad_size = sizeof(struct opa_mad); |
|
else |
|
mad_size = sizeof(struct ib_mad); |
|
|
|
pad = get_pad_size(hdr_len, data_len, mad_size); |
|
message_size = hdr_len + data_len + pad; |
|
|
|
if (ib_mad_kernel_rmpp_agent(mad_agent)) { |
|
if (!rmpp_active && message_size > mad_size) |
|
return ERR_PTR(-EINVAL); |
|
} else |
|
if (rmpp_active || message_size > mad_size) |
|
return ERR_PTR(-EINVAL); |
|
|
|
size = rmpp_active ? hdr_len : mad_size; |
|
buf = kzalloc(sizeof *mad_send_wr + size, gfp_mask); |
|
if (!buf) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
mad_send_wr = buf + size; |
|
INIT_LIST_HEAD(&mad_send_wr->rmpp_list); |
|
mad_send_wr->send_buf.mad = buf; |
|
mad_send_wr->send_buf.hdr_len = hdr_len; |
|
mad_send_wr->send_buf.data_len = data_len; |
|
mad_send_wr->pad = pad; |
|
|
|
mad_send_wr->mad_agent_priv = mad_agent_priv; |
|
mad_send_wr->sg_list[0].length = hdr_len; |
|
mad_send_wr->sg_list[0].lkey = mad_agent->qp->pd->local_dma_lkey; |
|
|
|
/* OPA MADs don't have to be the full 2048 bytes */ |
|
if (opa && base_version == OPA_MGMT_BASE_VERSION && |
|
data_len < mad_size - hdr_len) |
|
mad_send_wr->sg_list[1].length = data_len; |
|
else |
|
mad_send_wr->sg_list[1].length = mad_size - hdr_len; |
|
|
|
mad_send_wr->sg_list[1].lkey = mad_agent->qp->pd->local_dma_lkey; |
|
|
|
mad_send_wr->mad_list.cqe.done = ib_mad_send_done; |
|
|
|
mad_send_wr->send_wr.wr.wr_cqe = &mad_send_wr->mad_list.cqe; |
|
mad_send_wr->send_wr.wr.sg_list = mad_send_wr->sg_list; |
|
mad_send_wr->send_wr.wr.num_sge = 2; |
|
mad_send_wr->send_wr.wr.opcode = IB_WR_SEND; |
|
mad_send_wr->send_wr.wr.send_flags = IB_SEND_SIGNALED; |
|
mad_send_wr->send_wr.remote_qpn = remote_qpn; |
|
mad_send_wr->send_wr.remote_qkey = IB_QP_SET_QKEY; |
|
mad_send_wr->send_wr.pkey_index = pkey_index; |
|
|
|
if (rmpp_active) { |
|
ret = alloc_send_rmpp_list(mad_send_wr, mad_size, gfp_mask); |
|
if (ret) { |
|
kfree(buf); |
|
return ERR_PTR(ret); |
|
} |
|
} |
|
|
|
mad_send_wr->send_buf.mad_agent = mad_agent; |
|
refcount_inc(&mad_agent_priv->refcount); |
|
return &mad_send_wr->send_buf; |
|
} |
|
EXPORT_SYMBOL(ib_create_send_mad); |
|
|
|
int ib_get_mad_data_offset(u8 mgmt_class) |
|
{ |
|
if (mgmt_class == IB_MGMT_CLASS_SUBN_ADM) |
|
return IB_MGMT_SA_HDR; |
|
else if ((mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || |
|
(mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || |
|
(mgmt_class == IB_MGMT_CLASS_BIS)) |
|
return IB_MGMT_DEVICE_HDR; |
|
else if ((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && |
|
(mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END)) |
|
return IB_MGMT_VENDOR_HDR; |
|
else |
|
return IB_MGMT_MAD_HDR; |
|
} |
|
EXPORT_SYMBOL(ib_get_mad_data_offset); |
|
|
|
int ib_is_mad_class_rmpp(u8 mgmt_class) |
|
{ |
|
if ((mgmt_class == IB_MGMT_CLASS_SUBN_ADM) || |
|
(mgmt_class == IB_MGMT_CLASS_DEVICE_MGMT) || |
|
(mgmt_class == IB_MGMT_CLASS_DEVICE_ADM) || |
|
(mgmt_class == IB_MGMT_CLASS_BIS) || |
|
((mgmt_class >= IB_MGMT_CLASS_VENDOR_RANGE2_START) && |
|
(mgmt_class <= IB_MGMT_CLASS_VENDOR_RANGE2_END))) |
|
return 1; |
|
return 0; |
|
} |
|
EXPORT_SYMBOL(ib_is_mad_class_rmpp); |
|
|
|
void *ib_get_rmpp_segment(struct ib_mad_send_buf *send_buf, int seg_num) |
|
{ |
|
struct ib_mad_send_wr_private *mad_send_wr; |
|
struct list_head *list; |
|
|
|
mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, |
|
send_buf); |
|
list = &mad_send_wr->cur_seg->list; |
|
|
|
if (mad_send_wr->cur_seg->num < seg_num) { |
|
list_for_each_entry(mad_send_wr->cur_seg, list, list) |
|
if (mad_send_wr->cur_seg->num == seg_num) |
|
break; |
|
} else if (mad_send_wr->cur_seg->num > seg_num) { |
|
list_for_each_entry_reverse(mad_send_wr->cur_seg, list, list) |
|
if (mad_send_wr->cur_seg->num == seg_num) |
|
break; |
|
} |
|
return mad_send_wr->cur_seg->data; |
|
} |
|
EXPORT_SYMBOL(ib_get_rmpp_segment); |
|
|
|
static inline void *ib_get_payload(struct ib_mad_send_wr_private *mad_send_wr) |
|
{ |
|
if (mad_send_wr->send_buf.seg_count) |
|
return ib_get_rmpp_segment(&mad_send_wr->send_buf, |
|
mad_send_wr->seg_num); |
|
else |
|
return mad_send_wr->send_buf.mad + |
|
mad_send_wr->send_buf.hdr_len; |
|
} |
|
|
|
void ib_free_send_mad(struct ib_mad_send_buf *send_buf) |
|
{ |
|
struct ib_mad_agent_private *mad_agent_priv; |
|
struct ib_mad_send_wr_private *mad_send_wr; |
|
|
|
mad_agent_priv = container_of(send_buf->mad_agent, |
|
struct ib_mad_agent_private, agent); |
|
mad_send_wr = container_of(send_buf, struct ib_mad_send_wr_private, |
|
send_buf); |
|
|
|
free_send_rmpp_list(mad_send_wr); |
|
kfree(send_buf->mad); |
|
deref_mad_agent(mad_agent_priv); |
|
} |
|
EXPORT_SYMBOL(ib_free_send_mad); |
|
|
|
int ib_send_mad(struct ib_mad_send_wr_private *mad_send_wr) |
|
{ |
|
struct ib_mad_qp_info *qp_info; |
|
struct list_head *list; |
|
struct ib_mad_agent *mad_agent; |
|
struct ib_sge *sge; |
|
unsigned long flags; |
|
int ret; |
|
|
|
/* Set WR ID to find mad_send_wr upon completion */ |
|
qp_info = mad_send_wr->mad_agent_priv->qp_info; |
|
mad_send_wr->mad_list.mad_queue = &qp_info->send_queue; |
|
mad_send_wr->mad_list.cqe.done = ib_mad_send_done; |
|
mad_send_wr->send_wr.wr.wr_cqe = &mad_send_wr->mad_list.cqe; |
|
|
|
mad_agent = mad_send_wr->send_buf.mad_agent; |
|
sge = mad_send_wr->sg_list; |
|
sge[0].addr = ib_dma_map_single(mad_agent->device, |
|
mad_send_wr->send_buf.mad, |
|
sge[0].length, |
|
DMA_TO_DEVICE); |
|
if (unlikely(ib_dma_mapping_error(mad_agent->device, sge[0].addr))) |
|
return -ENOMEM; |
|
|
|
mad_send_wr->header_mapping = sge[0].addr; |
|
|
|
sge[1].addr = ib_dma_map_single(mad_agent->device, |
|
ib_get_payload(mad_send_wr), |
|
sge[1].length, |
|
DMA_TO_DEVICE); |
|
if (unlikely(ib_dma_mapping_error(mad_agent->device, sge[1].addr))) { |
|
ib_dma_unmap_single(mad_agent->device, |
|
mad_send_wr->header_mapping, |
|
sge[0].length, DMA_TO_DEVICE); |
|
return -ENOMEM; |
|
} |
|
mad_send_wr->payload_mapping = sge[1].addr; |
|
|
|
spin_lock_irqsave(&qp_info->send_queue.lock, flags); |
|
if (qp_info->send_queue.count < qp_info->send_queue.max_active) { |
|
trace_ib_mad_ib_send_mad(mad_send_wr, qp_info); |
|
ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr.wr, |
|
NULL); |
|
list = &qp_info->send_queue.list; |
|
} else { |
|
ret = 0; |
|
list = &qp_info->overflow_list; |
|
} |
|
|
|
if (!ret) { |
|
qp_info->send_queue.count++; |
|
list_add_tail(&mad_send_wr->mad_list.list, list); |
|
} |
|
spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); |
|
if (ret) { |
|
ib_dma_unmap_single(mad_agent->device, |
|
mad_send_wr->header_mapping, |
|
sge[0].length, DMA_TO_DEVICE); |
|
ib_dma_unmap_single(mad_agent->device, |
|
mad_send_wr->payload_mapping, |
|
sge[1].length, DMA_TO_DEVICE); |
|
} |
|
return ret; |
|
} |
|
|
|
/* |
|
* ib_post_send_mad - Posts MAD(s) to the send queue of the QP associated |
|
* with the registered client |
|
*/ |
|
int ib_post_send_mad(struct ib_mad_send_buf *send_buf, |
|
struct ib_mad_send_buf **bad_send_buf) |
|
{ |
|
struct ib_mad_agent_private *mad_agent_priv; |
|
struct ib_mad_send_buf *next_send_buf; |
|
struct ib_mad_send_wr_private *mad_send_wr; |
|
unsigned long flags; |
|
int ret = -EINVAL; |
|
|
|
/* Walk list of send WRs and post each on send list */ |
|
for (; send_buf; send_buf = next_send_buf) { |
|
mad_send_wr = container_of(send_buf, |
|
struct ib_mad_send_wr_private, |
|
send_buf); |
|
mad_agent_priv = mad_send_wr->mad_agent_priv; |
|
|
|
ret = ib_mad_enforce_security(mad_agent_priv, |
|
mad_send_wr->send_wr.pkey_index); |
|
if (ret) |
|
goto error; |
|
|
|
if (!send_buf->mad_agent->send_handler || |
|
(send_buf->timeout_ms && |
|
!send_buf->mad_agent->recv_handler)) { |
|
ret = -EINVAL; |
|
goto error; |
|
} |
|
|
|
if (!ib_is_mad_class_rmpp(((struct ib_mad_hdr *) send_buf->mad)->mgmt_class)) { |
|
if (mad_agent_priv->agent.rmpp_version) { |
|
ret = -EINVAL; |
|
goto error; |
|
} |
|
} |
|
|
|
/* |
|
* Save pointer to next work request to post in case the |
|
* current one completes, and the user modifies the work |
|
* request associated with the completion |
|
*/ |
|
next_send_buf = send_buf->next; |
|
mad_send_wr->send_wr.ah = send_buf->ah; |
|
|
|
if (((struct ib_mad_hdr *) send_buf->mad)->mgmt_class == |
|
IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { |
|
ret = handle_outgoing_dr_smp(mad_agent_priv, |
|
mad_send_wr); |
|
if (ret < 0) /* error */ |
|
goto error; |
|
else if (ret == 1) /* locally consumed */ |
|
continue; |
|
} |
|
|
|
mad_send_wr->tid = ((struct ib_mad_hdr *) send_buf->mad)->tid; |
|
/* Timeout will be updated after send completes */ |
|
mad_send_wr->timeout = msecs_to_jiffies(send_buf->timeout_ms); |
|
mad_send_wr->max_retries = send_buf->retries; |
|
mad_send_wr->retries_left = send_buf->retries; |
|
send_buf->retries = 0; |
|
/* Reference for work request to QP + response */ |
|
mad_send_wr->refcount = 1 + (mad_send_wr->timeout > 0); |
|
mad_send_wr->status = IB_WC_SUCCESS; |
|
|
|
/* Reference MAD agent until send completes */ |
|
refcount_inc(&mad_agent_priv->refcount); |
|
spin_lock_irqsave(&mad_agent_priv->lock, flags); |
|
list_add_tail(&mad_send_wr->agent_list, |
|
&mad_agent_priv->send_list); |
|
spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
|
|
|
if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) { |
|
ret = ib_send_rmpp_mad(mad_send_wr); |
|
if (ret >= 0 && ret != IB_RMPP_RESULT_CONSUMED) |
|
ret = ib_send_mad(mad_send_wr); |
|
} else |
|
ret = ib_send_mad(mad_send_wr); |
|
if (ret < 0) { |
|
/* Fail send request */ |
|
spin_lock_irqsave(&mad_agent_priv->lock, flags); |
|
list_del(&mad_send_wr->agent_list); |
|
spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
|
deref_mad_agent(mad_agent_priv); |
|
goto error; |
|
} |
|
} |
|
return 0; |
|
error: |
|
if (bad_send_buf) |
|
*bad_send_buf = send_buf; |
|
return ret; |
|
} |
|
EXPORT_SYMBOL(ib_post_send_mad); |
|
|
|
/* |
|
* ib_free_recv_mad - Returns data buffers used to receive |
|
* a MAD to the access layer |
|
*/ |
|
void ib_free_recv_mad(struct ib_mad_recv_wc *mad_recv_wc) |
|
{ |
|
struct ib_mad_recv_buf *mad_recv_buf, *temp_recv_buf; |
|
struct ib_mad_private_header *mad_priv_hdr; |
|
struct ib_mad_private *priv; |
|
struct list_head free_list; |
|
|
|
INIT_LIST_HEAD(&free_list); |
|
list_splice_init(&mad_recv_wc->rmpp_list, &free_list); |
|
|
|
list_for_each_entry_safe(mad_recv_buf, temp_recv_buf, |
|
&free_list, list) { |
|
mad_recv_wc = container_of(mad_recv_buf, struct ib_mad_recv_wc, |
|
recv_buf); |
|
mad_priv_hdr = container_of(mad_recv_wc, |
|
struct ib_mad_private_header, |
|
recv_wc); |
|
priv = container_of(mad_priv_hdr, struct ib_mad_private, |
|
header); |
|
kfree(priv); |
|
} |
|
} |
|
EXPORT_SYMBOL(ib_free_recv_mad); |
|
|
|
static int method_in_use(struct ib_mad_mgmt_method_table **method, |
|
struct ib_mad_reg_req *mad_reg_req) |
|
{ |
|
int i; |
|
|
|
for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) { |
|
if ((*method)->agent[i]) { |
|
pr_err("Method %d already in use\n", i); |
|
return -EINVAL; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
static int allocate_method_table(struct ib_mad_mgmt_method_table **method) |
|
{ |
|
/* Allocate management method table */ |
|
*method = kzalloc(sizeof **method, GFP_ATOMIC); |
|
return (*method) ? 0 : (-ENOMEM); |
|
} |
|
|
|
/* |
|
* Check to see if there are any methods still in use |
|
*/ |
|
static int check_method_table(struct ib_mad_mgmt_method_table *method) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < IB_MGMT_MAX_METHODS; i++) |
|
if (method->agent[i]) |
|
return 1; |
|
return 0; |
|
} |
|
|
|
/* |
|
* Check to see if there are any method tables for this class still in use |
|
*/ |
|
static int check_class_table(struct ib_mad_mgmt_class_table *class) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < MAX_MGMT_CLASS; i++) |
|
if (class->method_table[i]) |
|
return 1; |
|
return 0; |
|
} |
|
|
|
static int check_vendor_class(struct ib_mad_mgmt_vendor_class *vendor_class) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < MAX_MGMT_OUI; i++) |
|
if (vendor_class->method_table[i]) |
|
return 1; |
|
return 0; |
|
} |
|
|
|
static int find_vendor_oui(struct ib_mad_mgmt_vendor_class *vendor_class, |
|
const char *oui) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < MAX_MGMT_OUI; i++) |
|
/* Is there matching OUI for this vendor class ? */ |
|
if (!memcmp(vendor_class->oui[i], oui, 3)) |
|
return i; |
|
|
|
return -1; |
|
} |
|
|
|
static int check_vendor_table(struct ib_mad_mgmt_vendor_class_table *vendor) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < MAX_MGMT_VENDOR_RANGE2; i++) |
|
if (vendor->vendor_class[i]) |
|
return 1; |
|
|
|
return 0; |
|
} |
|
|
|
static void remove_methods_mad_agent(struct ib_mad_mgmt_method_table *method, |
|
struct ib_mad_agent_private *agent) |
|
{ |
|
int i; |
|
|
|
/* Remove any methods for this mad agent */ |
|
for (i = 0; i < IB_MGMT_MAX_METHODS; i++) { |
|
if (method->agent[i] == agent) { |
|
method->agent[i] = NULL; |
|
} |
|
} |
|
} |
|
|
|
static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
|
struct ib_mad_agent_private *agent_priv, |
|
u8 mgmt_class) |
|
{ |
|
struct ib_mad_port_private *port_priv; |
|
struct ib_mad_mgmt_class_table **class; |
|
struct ib_mad_mgmt_method_table **method; |
|
int i, ret; |
|
|
|
port_priv = agent_priv->qp_info->port_priv; |
|
class = &port_priv->version[mad_reg_req->mgmt_class_version].class; |
|
if (!*class) { |
|
/* Allocate management class table for "new" class version */ |
|
*class = kzalloc(sizeof **class, GFP_ATOMIC); |
|
if (!*class) { |
|
ret = -ENOMEM; |
|
goto error1; |
|
} |
|
|
|
/* Allocate method table for this management class */ |
|
method = &(*class)->method_table[mgmt_class]; |
|
if ((ret = allocate_method_table(method))) |
|
goto error2; |
|
} else { |
|
method = &(*class)->method_table[mgmt_class]; |
|
if (!*method) { |
|
/* Allocate method table for this management class */ |
|
if ((ret = allocate_method_table(method))) |
|
goto error1; |
|
} |
|
} |
|
|
|
/* Now, make sure methods are not already in use */ |
|
if (method_in_use(method, mad_reg_req)) |
|
goto error3; |
|
|
|
/* Finally, add in methods being registered */ |
|
for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) |
|
(*method)->agent[i] = agent_priv; |
|
|
|
return 0; |
|
|
|
error3: |
|
/* Remove any methods for this mad agent */ |
|
remove_methods_mad_agent(*method, agent_priv); |
|
/* Now, check to see if there are any methods in use */ |
|
if (!check_method_table(*method)) { |
|
/* If not, release management method table */ |
|
kfree(*method); |
|
*method = NULL; |
|
} |
|
ret = -EINVAL; |
|
goto error1; |
|
error2: |
|
kfree(*class); |
|
*class = NULL; |
|
error1: |
|
return ret; |
|
} |
|
|
|
static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
|
struct ib_mad_agent_private *agent_priv) |
|
{ |
|
struct ib_mad_port_private *port_priv; |
|
struct ib_mad_mgmt_vendor_class_table **vendor_table; |
|
struct ib_mad_mgmt_vendor_class_table *vendor = NULL; |
|
struct ib_mad_mgmt_vendor_class *vendor_class = NULL; |
|
struct ib_mad_mgmt_method_table **method; |
|
int i, ret = -ENOMEM; |
|
u8 vclass; |
|
|
|
/* "New" vendor (with OUI) class */ |
|
vclass = vendor_class_index(mad_reg_req->mgmt_class); |
|
port_priv = agent_priv->qp_info->port_priv; |
|
vendor_table = &port_priv->version[ |
|
mad_reg_req->mgmt_class_version].vendor; |
|
if (!*vendor_table) { |
|
/* Allocate mgmt vendor class table for "new" class version */ |
|
vendor = kzalloc(sizeof *vendor, GFP_ATOMIC); |
|
if (!vendor) |
|
goto error1; |
|
|
|
*vendor_table = vendor; |
|
} |
|
if (!(*vendor_table)->vendor_class[vclass]) { |
|
/* Allocate table for this management vendor class */ |
|
vendor_class = kzalloc(sizeof *vendor_class, GFP_ATOMIC); |
|
if (!vendor_class) |
|
goto error2; |
|
|
|
(*vendor_table)->vendor_class[vclass] = vendor_class; |
|
} |
|
for (i = 0; i < MAX_MGMT_OUI; i++) { |
|
/* Is there matching OUI for this vendor class ? */ |
|
if (!memcmp((*vendor_table)->vendor_class[vclass]->oui[i], |
|
mad_reg_req->oui, 3)) { |
|
method = &(*vendor_table)->vendor_class[ |
|
vclass]->method_table[i]; |
|
if (!*method) |
|
goto error3; |
|
goto check_in_use; |
|
} |
|
} |
|
for (i = 0; i < MAX_MGMT_OUI; i++) { |
|
/* OUI slot available ? */ |
|
if (!is_vendor_oui((*vendor_table)->vendor_class[ |
|
vclass]->oui[i])) { |
|
method = &(*vendor_table)->vendor_class[ |
|
vclass]->method_table[i]; |
|
/* Allocate method table for this OUI */ |
|
if (!*method) { |
|
ret = allocate_method_table(method); |
|
if (ret) |
|
goto error3; |
|
} |
|
memcpy((*vendor_table)->vendor_class[vclass]->oui[i], |
|
mad_reg_req->oui, 3); |
|
goto check_in_use; |
|
} |
|
} |
|
dev_err(&agent_priv->agent.device->dev, "All OUI slots in use\n"); |
|
goto error3; |
|
|
|
check_in_use: |
|
/* Now, make sure methods are not already in use */ |
|
if (method_in_use(method, mad_reg_req)) |
|
goto error4; |
|
|
|
/* Finally, add in methods being registered */ |
|
for_each_set_bit(i, mad_reg_req->method_mask, IB_MGMT_MAX_METHODS) |
|
(*method)->agent[i] = agent_priv; |
|
|
|
return 0; |
|
|
|
error4: |
|
/* Remove any methods for this mad agent */ |
|
remove_methods_mad_agent(*method, agent_priv); |
|
/* Now, check to see if there are any methods in use */ |
|
if (!check_method_table(*method)) { |
|
/* If not, release management method table */ |
|
kfree(*method); |
|
*method = NULL; |
|
} |
|
ret = -EINVAL; |
|
error3: |
|
if (vendor_class) { |
|
(*vendor_table)->vendor_class[vclass] = NULL; |
|
kfree(vendor_class); |
|
} |
|
error2: |
|
if (vendor) { |
|
*vendor_table = NULL; |
|
kfree(vendor); |
|
} |
|
error1: |
|
return ret; |
|
} |
|
|
|
static void remove_mad_reg_req(struct ib_mad_agent_private *agent_priv) |
|
{ |
|
struct ib_mad_port_private *port_priv; |
|
struct ib_mad_mgmt_class_table *class; |
|
struct ib_mad_mgmt_method_table *method; |
|
struct ib_mad_mgmt_vendor_class_table *vendor; |
|
struct ib_mad_mgmt_vendor_class *vendor_class; |
|
int index; |
|
u8 mgmt_class; |
|
|
|
/* |
|
* Was MAD registration request supplied |
|
* with original registration ? |
|
*/ |
|
if (!agent_priv->reg_req) { |
|
goto out; |
|
} |
|
|
|
port_priv = agent_priv->qp_info->port_priv; |
|
mgmt_class = convert_mgmt_class(agent_priv->reg_req->mgmt_class); |
|
class = port_priv->version[ |
|
agent_priv->reg_req->mgmt_class_version].class; |
|
if (!class) |
|
goto vendor_check; |
|
|
|
method = class->method_table[mgmt_class]; |
|
if (method) { |
|
/* Remove any methods for this mad agent */ |
|
remove_methods_mad_agent(method, agent_priv); |
|
/* Now, check to see if there are any methods still in use */ |
|
if (!check_method_table(method)) { |
|
/* If not, release management method table */ |
|
kfree(method); |
|
class->method_table[mgmt_class] = NULL; |
|
/* Any management classes left ? */ |
|
if (!check_class_table(class)) { |
|
/* If not, release management class table */ |
|
kfree(class); |
|
port_priv->version[ |
|
agent_priv->reg_req-> |
|
mgmt_class_version].class = NULL; |
|
} |
|
} |
|
} |
|
|
|
vendor_check: |
|
if (!is_vendor_class(mgmt_class)) |
|
goto out; |
|
|
|
/* normalize mgmt_class to vendor range 2 */ |
|
mgmt_class = vendor_class_index(agent_priv->reg_req->mgmt_class); |
|
vendor = port_priv->version[ |
|
agent_priv->reg_req->mgmt_class_version].vendor; |
|
|
|
if (!vendor) |
|
goto out; |
|
|
|
vendor_class = vendor->vendor_class[mgmt_class]; |
|
if (vendor_class) { |
|
index = find_vendor_oui(vendor_class, agent_priv->reg_req->oui); |
|
if (index < 0) |
|
goto out; |
|
method = vendor_class->method_table[index]; |
|
if (method) { |
|
/* Remove any methods for this mad agent */ |
|
remove_methods_mad_agent(method, agent_priv); |
|
/* |
|
* Now, check to see if there are |
|
* any methods still in use |
|
*/ |
|
if (!check_method_table(method)) { |
|
/* If not, release management method table */ |
|
kfree(method); |
|
vendor_class->method_table[index] = NULL; |
|
memset(vendor_class->oui[index], 0, 3); |
|
/* Any OUIs left ? */ |
|
if (!check_vendor_class(vendor_class)) { |
|
/* If not, release vendor class table */ |
|
kfree(vendor_class); |
|
vendor->vendor_class[mgmt_class] = NULL; |
|
/* Any other vendor classes left ? */ |
|
if (!check_vendor_table(vendor)) { |
|
kfree(vendor); |
|
port_priv->version[ |
|
agent_priv->reg_req-> |
|
mgmt_class_version]. |
|
vendor = NULL; |
|
} |
|
} |
|
} |
|
} |
|
} |
|
|
|
out: |
|
return; |
|
} |
|
|
|
static struct ib_mad_agent_private * |
|
find_mad_agent(struct ib_mad_port_private *port_priv, |
|
const struct ib_mad_hdr *mad_hdr) |
|
{ |
|
struct ib_mad_agent_private *mad_agent = NULL; |
|
unsigned long flags; |
|
|
|
if (ib_response_mad(mad_hdr)) { |
|
u32 hi_tid; |
|
|
|
/* |
|
* Routing is based on high 32 bits of transaction ID |
|
* of MAD. |
|
*/ |
|
hi_tid = be64_to_cpu(mad_hdr->tid) >> 32; |
|
rcu_read_lock(); |
|
mad_agent = xa_load(&ib_mad_clients, hi_tid); |
|
if (mad_agent && !refcount_inc_not_zero(&mad_agent->refcount)) |
|
mad_agent = NULL; |
|
rcu_read_unlock(); |
|
} else { |
|
struct ib_mad_mgmt_class_table *class; |
|
struct ib_mad_mgmt_method_table *method; |
|
struct ib_mad_mgmt_vendor_class_table *vendor; |
|
struct ib_mad_mgmt_vendor_class *vendor_class; |
|
const struct ib_vendor_mad *vendor_mad; |
|
int index; |
|
|
|
spin_lock_irqsave(&port_priv->reg_lock, flags); |
|
/* |
|
* Routing is based on version, class, and method |
|
* For "newer" vendor MADs, also based on OUI |
|
*/ |
|
if (mad_hdr->class_version >= MAX_MGMT_VERSION) |
|
goto out; |
|
if (!is_vendor_class(mad_hdr->mgmt_class)) { |
|
class = port_priv->version[ |
|
mad_hdr->class_version].class; |
|
if (!class) |
|
goto out; |
|
if (convert_mgmt_class(mad_hdr->mgmt_class) >= |
|
ARRAY_SIZE(class->method_table)) |
|
goto out; |
|
method = class->method_table[convert_mgmt_class( |
|
mad_hdr->mgmt_class)]; |
|
if (method) |
|
mad_agent = method->agent[mad_hdr->method & |
|
~IB_MGMT_METHOD_RESP]; |
|
} else { |
|
vendor = port_priv->version[ |
|
mad_hdr->class_version].vendor; |
|
if (!vendor) |
|
goto out; |
|
vendor_class = vendor->vendor_class[vendor_class_index( |
|
mad_hdr->mgmt_class)]; |
|
if (!vendor_class) |
|
goto out; |
|
/* Find matching OUI */ |
|
vendor_mad = (const struct ib_vendor_mad *)mad_hdr; |
|
index = find_vendor_oui(vendor_class, vendor_mad->oui); |
|
if (index == -1) |
|
goto out; |
|
method = vendor_class->method_table[index]; |
|
if (method) { |
|
mad_agent = method->agent[mad_hdr->method & |
|
~IB_MGMT_METHOD_RESP]; |
|
} |
|
} |
|
if (mad_agent) |
|
refcount_inc(&mad_agent->refcount); |
|
out: |
|
spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
|
} |
|
|
|
if (mad_agent && !mad_agent->agent.recv_handler) { |
|
dev_notice(&port_priv->device->dev, |
|
"No receive handler for client %p on port %d\n", |
|
&mad_agent->agent, port_priv->port_num); |
|
deref_mad_agent(mad_agent); |
|
mad_agent = NULL; |
|
} |
|
|
|
return mad_agent; |
|
} |
|
|
|
static int validate_mad(const struct ib_mad_hdr *mad_hdr, |
|
const struct ib_mad_qp_info *qp_info, |
|
bool opa) |
|
{ |
|
int valid = 0; |
|
u32 qp_num = qp_info->qp->qp_num; |
|
|
|
/* Make sure MAD base version is understood */ |
|
if (mad_hdr->base_version != IB_MGMT_BASE_VERSION && |
|
(!opa || mad_hdr->base_version != OPA_MGMT_BASE_VERSION)) { |
|
pr_err("MAD received with unsupported base version %d %s\n", |
|
mad_hdr->base_version, opa ? "(opa)" : ""); |
|
goto out; |
|
} |
|
|
|
/* Filter SMI packets sent to other than QP0 */ |
|
if ((mad_hdr->mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED) || |
|
(mad_hdr->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { |
|
if (qp_num == 0) |
|
valid = 1; |
|
} else { |
|
/* CM attributes other than ClassPortInfo only use Send method */ |
|
if ((mad_hdr->mgmt_class == IB_MGMT_CLASS_CM) && |
|
(mad_hdr->attr_id != IB_MGMT_CLASSPORTINFO_ATTR_ID) && |
|
(mad_hdr->method != IB_MGMT_METHOD_SEND)) |
|
goto out; |
|
/* Filter GSI packets sent to QP0 */ |
|
if (qp_num != 0) |
|
valid = 1; |
|
} |
|
|
|
out: |
|
return valid; |
|
} |
|
|
|
static int is_rmpp_data_mad(const struct ib_mad_agent_private *mad_agent_priv, |
|
const struct ib_mad_hdr *mad_hdr) |
|
{ |
|
struct ib_rmpp_mad *rmpp_mad; |
|
|
|
rmpp_mad = (struct ib_rmpp_mad *)mad_hdr; |
|
return !mad_agent_priv->agent.rmpp_version || |
|
!ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent) || |
|
!(ib_get_rmpp_flags(&rmpp_mad->rmpp_hdr) & |
|
IB_MGMT_RMPP_FLAG_ACTIVE) || |
|
(rmpp_mad->rmpp_hdr.rmpp_type == IB_MGMT_RMPP_TYPE_DATA); |
|
} |
|
|
|
static inline int rcv_has_same_class(const struct ib_mad_send_wr_private *wr, |
|
const struct ib_mad_recv_wc *rwc) |
|
{ |
|
return ((struct ib_mad_hdr *)(wr->send_buf.mad))->mgmt_class == |
|
rwc->recv_buf.mad->mad_hdr.mgmt_class; |
|
} |
|
|
|
static inline int rcv_has_same_gid(const struct ib_mad_agent_private *mad_agent_priv, |
|
const struct ib_mad_send_wr_private *wr, |
|
const struct ib_mad_recv_wc *rwc ) |
|
{ |
|
struct rdma_ah_attr attr; |
|
u8 send_resp, rcv_resp; |
|
union ib_gid sgid; |
|
struct ib_device *device = mad_agent_priv->agent.device; |
|
u8 port_num = mad_agent_priv->agent.port_num; |
|
u8 lmc; |
|
bool has_grh; |
|
|
|
send_resp = ib_response_mad((struct ib_mad_hdr *)wr->send_buf.mad); |
|
rcv_resp = ib_response_mad(&rwc->recv_buf.mad->mad_hdr); |
|
|
|
if (send_resp == rcv_resp) |
|
/* both requests, or both responses. GIDs different */ |
|
return 0; |
|
|
|
if (rdma_query_ah(wr->send_buf.ah, &attr)) |
|
/* Assume not equal, to avoid false positives. */ |
|
return 0; |
|
|
|
has_grh = !!(rdma_ah_get_ah_flags(&attr) & IB_AH_GRH); |
|
if (has_grh != !!(rwc->wc->wc_flags & IB_WC_GRH)) |
|
/* one has GID, other does not. Assume different */ |
|
return 0; |
|
|
|
if (!send_resp && rcv_resp) { |
|
/* is request/response. */ |
|
if (!has_grh) { |
|
if (ib_get_cached_lmc(device, port_num, &lmc)) |
|
return 0; |
|
return (!lmc || !((rdma_ah_get_path_bits(&attr) ^ |
|
rwc->wc->dlid_path_bits) & |
|
((1 << lmc) - 1))); |
|
} else { |
|
const struct ib_global_route *grh = |
|
rdma_ah_read_grh(&attr); |
|
|
|
if (rdma_query_gid(device, port_num, |
|
grh->sgid_index, &sgid)) |
|
return 0; |
|
return !memcmp(sgid.raw, rwc->recv_buf.grh->dgid.raw, |
|
16); |
|
} |
|
} |
|
|
|
if (!has_grh) |
|
return rdma_ah_get_dlid(&attr) == rwc->wc->slid; |
|
else |
|
return !memcmp(rdma_ah_read_grh(&attr)->dgid.raw, |
|
rwc->recv_buf.grh->sgid.raw, |
|
16); |
|
} |
|
|
|
static inline int is_direct(u8 class) |
|
{ |
|
return (class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE); |
|
} |
|
|
|
struct ib_mad_send_wr_private* |
|
ib_find_send_mad(const struct ib_mad_agent_private *mad_agent_priv, |
|
const struct ib_mad_recv_wc *wc) |
|
{ |
|
struct ib_mad_send_wr_private *wr; |
|
const struct ib_mad_hdr *mad_hdr; |
|
|
|
mad_hdr = &wc->recv_buf.mad->mad_hdr; |
|
|
|
list_for_each_entry(wr, &mad_agent_priv->wait_list, agent_list) { |
|
if ((wr->tid == mad_hdr->tid) && |
|
rcv_has_same_class(wr, wc) && |
|
/* |
|
* Don't check GID for direct routed MADs. |
|
* These might have permissive LIDs. |
|
*/ |
|
(is_direct(mad_hdr->mgmt_class) || |
|
rcv_has_same_gid(mad_agent_priv, wr, wc))) |
|
return (wr->status == IB_WC_SUCCESS) ? wr : NULL; |
|
} |
|
|
|
/* |
|
* It's possible to receive the response before we've |
|
* been notified that the send has completed |
|
*/ |
|
list_for_each_entry(wr, &mad_agent_priv->send_list, agent_list) { |
|
if (is_rmpp_data_mad(mad_agent_priv, wr->send_buf.mad) && |
|
wr->tid == mad_hdr->tid && |
|
wr->timeout && |
|
rcv_has_same_class(wr, wc) && |
|
/* |
|
* Don't check GID for direct routed MADs. |
|
* These might have permissive LIDs. |
|
*/ |
|
(is_direct(mad_hdr->mgmt_class) || |
|
rcv_has_same_gid(mad_agent_priv, wr, wc))) |
|
/* Verify request has not been canceled */ |
|
return (wr->status == IB_WC_SUCCESS) ? wr : NULL; |
|
} |
|
return NULL; |
|
} |
|
|
|
void ib_mark_mad_done(struct ib_mad_send_wr_private *mad_send_wr) |
|
{ |
|
mad_send_wr->timeout = 0; |
|
if (mad_send_wr->refcount == 1) |
|
list_move_tail(&mad_send_wr->agent_list, |
|
&mad_send_wr->mad_agent_priv->done_list); |
|
} |
|
|
|
static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv, |
|
struct ib_mad_recv_wc *mad_recv_wc) |
|
{ |
|
struct ib_mad_send_wr_private *mad_send_wr; |
|
struct ib_mad_send_wc mad_send_wc; |
|
unsigned long flags; |
|
int ret; |
|
|
|
INIT_LIST_HEAD(&mad_recv_wc->rmpp_list); |
|
ret = ib_mad_enforce_security(mad_agent_priv, |
|
mad_recv_wc->wc->pkey_index); |
|
if (ret) { |
|
ib_free_recv_mad(mad_recv_wc); |
|
deref_mad_agent(mad_agent_priv); |
|
return; |
|
} |
|
|
|
list_add(&mad_recv_wc->recv_buf.list, &mad_recv_wc->rmpp_list); |
|
if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) { |
|
mad_recv_wc = ib_process_rmpp_recv_wc(mad_agent_priv, |
|
mad_recv_wc); |
|
if (!mad_recv_wc) { |
|
deref_mad_agent(mad_agent_priv); |
|
return; |
|
} |
|
} |
|
|
|
/* Complete corresponding request */ |
|
if (ib_response_mad(&mad_recv_wc->recv_buf.mad->mad_hdr)) { |
|
spin_lock_irqsave(&mad_agent_priv->lock, flags); |
|
mad_send_wr = ib_find_send_mad(mad_agent_priv, mad_recv_wc); |
|
if (!mad_send_wr) { |
|
spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
|
if (!ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent) |
|
&& ib_is_mad_class_rmpp(mad_recv_wc->recv_buf.mad->mad_hdr.mgmt_class) |
|
&& (ib_get_rmpp_flags(&((struct ib_rmpp_mad *)mad_recv_wc->recv_buf.mad)->rmpp_hdr) |
|
& IB_MGMT_RMPP_FLAG_ACTIVE)) { |
|
/* user rmpp is in effect |
|
* and this is an active RMPP MAD |
|
*/ |
|
mad_agent_priv->agent.recv_handler( |
|
&mad_agent_priv->agent, NULL, |
|
mad_recv_wc); |
|
deref_mad_agent(mad_agent_priv); |
|
} else { |
|
/* not user rmpp, revert to normal behavior and |
|
* drop the mad */ |
|
ib_free_recv_mad(mad_recv_wc); |
|
deref_mad_agent(mad_agent_priv); |
|
return; |
|
} |
|
} else { |
|
ib_mark_mad_done(mad_send_wr); |
|
spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
|
|
|
/* Defined behavior is to complete response before request */ |
|
mad_agent_priv->agent.recv_handler( |
|
&mad_agent_priv->agent, |
|
&mad_send_wr->send_buf, |
|
mad_recv_wc); |
|
deref_mad_agent(mad_agent_priv); |
|
|
|
mad_send_wc.status = IB_WC_SUCCESS; |
|
mad_send_wc.vendor_err = 0; |
|
mad_send_wc.send_buf = &mad_send_wr->send_buf; |
|
ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
|
} |
|
} else { |
|
mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, NULL, |
|
mad_recv_wc); |
|
deref_mad_agent(mad_agent_priv); |
|
} |
|
|
|
return; |
|
} |
|
|
|
static enum smi_action handle_ib_smi(const struct ib_mad_port_private *port_priv, |
|
const struct ib_mad_qp_info *qp_info, |
|
const struct ib_wc *wc, |
|
int port_num, |
|
struct ib_mad_private *recv, |
|
struct ib_mad_private *response) |
|
{ |
|
enum smi_forward_action retsmi; |
|
struct ib_smp *smp = (struct ib_smp *)recv->mad; |
|
|
|
trace_ib_mad_handle_ib_smi(smp); |
|
|
|
if (smi_handle_dr_smp_recv(smp, |
|
rdma_cap_ib_switch(port_priv->device), |
|
port_num, |
|
port_priv->device->phys_port_cnt) == |
|
IB_SMI_DISCARD) |
|
return IB_SMI_DISCARD; |
|
|
|
retsmi = smi_check_forward_dr_smp(smp); |
|
if (retsmi == IB_SMI_LOCAL) |
|
return IB_SMI_HANDLE; |
|
|
|
if (retsmi == IB_SMI_SEND) { /* don't forward */ |
|
if (smi_handle_dr_smp_send(smp, |
|
rdma_cap_ib_switch(port_priv->device), |
|
port_num) == IB_SMI_DISCARD) |
|
return IB_SMI_DISCARD; |
|
|
|
if (smi_check_local_smp(smp, port_priv->device) == IB_SMI_DISCARD) |
|
return IB_SMI_DISCARD; |
|
} else if (rdma_cap_ib_switch(port_priv->device)) { |
|
/* forward case for switches */ |
|
memcpy(response, recv, mad_priv_size(response)); |
|
response->header.recv_wc.wc = &response->header.wc; |
|
response->header.recv_wc.recv_buf.mad = (struct ib_mad *)response->mad; |
|
response->header.recv_wc.recv_buf.grh = &response->grh; |
|
|
|
agent_send_response((const struct ib_mad_hdr *)response->mad, |
|
&response->grh, wc, |
|
port_priv->device, |
|
smi_get_fwd_port(smp), |
|
qp_info->qp->qp_num, |
|
response->mad_size, |
|
false); |
|
|
|
return IB_SMI_DISCARD; |
|
} |
|
return IB_SMI_HANDLE; |
|
} |
|
|
|
static bool generate_unmatched_resp(const struct ib_mad_private *recv, |
|
struct ib_mad_private *response, |
|
size_t *resp_len, bool opa) |
|
{ |
|
const struct ib_mad_hdr *recv_hdr = (const struct ib_mad_hdr *)recv->mad; |
|
struct ib_mad_hdr *resp_hdr = (struct ib_mad_hdr *)response->mad; |
|
|
|
if (recv_hdr->method == IB_MGMT_METHOD_GET || |
|
recv_hdr->method == IB_MGMT_METHOD_SET) { |
|
memcpy(response, recv, mad_priv_size(response)); |
|
response->header.recv_wc.wc = &response->header.wc; |
|
response->header.recv_wc.recv_buf.mad = (struct ib_mad *)response->mad; |
|
response->header.recv_wc.recv_buf.grh = &response->grh; |
|
resp_hdr->method = IB_MGMT_METHOD_GET_RESP; |
|
resp_hdr->status = cpu_to_be16(IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB); |
|
if (recv_hdr->mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) |
|
resp_hdr->status |= IB_SMP_DIRECTION; |
|
|
|
if (opa && recv_hdr->base_version == OPA_MGMT_BASE_VERSION) { |
|
if (recv_hdr->mgmt_class == |
|
IB_MGMT_CLASS_SUBN_LID_ROUTED || |
|
recv_hdr->mgmt_class == |
|
IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) |
|
*resp_len = opa_get_smp_header_size( |
|
(struct opa_smp *)recv->mad); |
|
else |
|
*resp_len = sizeof(struct ib_mad_hdr); |
|
} |
|
|
|
return true; |
|
} else { |
|
return false; |
|
} |
|
} |
|
|
|
static enum smi_action |
|
handle_opa_smi(struct ib_mad_port_private *port_priv, |
|
struct ib_mad_qp_info *qp_info, |
|
struct ib_wc *wc, |
|
int port_num, |
|
struct ib_mad_private *recv, |
|
struct ib_mad_private *response) |
|
{ |
|
enum smi_forward_action retsmi; |
|
struct opa_smp *smp = (struct opa_smp *)recv->mad; |
|
|
|
trace_ib_mad_handle_opa_smi(smp); |
|
|
|
if (opa_smi_handle_dr_smp_recv(smp, |
|
rdma_cap_ib_switch(port_priv->device), |
|
port_num, |
|
port_priv->device->phys_port_cnt) == |
|
IB_SMI_DISCARD) |
|
return IB_SMI_DISCARD; |
|
|
|
retsmi = opa_smi_check_forward_dr_smp(smp); |
|
if (retsmi == IB_SMI_LOCAL) |
|
return IB_SMI_HANDLE; |
|
|
|
if (retsmi == IB_SMI_SEND) { /* don't forward */ |
|
if (opa_smi_handle_dr_smp_send(smp, |
|
rdma_cap_ib_switch(port_priv->device), |
|
port_num) == IB_SMI_DISCARD) |
|
return IB_SMI_DISCARD; |
|
|
|
if (opa_smi_check_local_smp(smp, port_priv->device) == |
|
IB_SMI_DISCARD) |
|
return IB_SMI_DISCARD; |
|
|
|
} else if (rdma_cap_ib_switch(port_priv->device)) { |
|
/* forward case for switches */ |
|
memcpy(response, recv, mad_priv_size(response)); |
|
response->header.recv_wc.wc = &response->header.wc; |
|
response->header.recv_wc.recv_buf.opa_mad = |
|
(struct opa_mad *)response->mad; |
|
response->header.recv_wc.recv_buf.grh = &response->grh; |
|
|
|
agent_send_response((const struct ib_mad_hdr *)response->mad, |
|
&response->grh, wc, |
|
port_priv->device, |
|
opa_smi_get_fwd_port(smp), |
|
qp_info->qp->qp_num, |
|
recv->header.wc.byte_len, |
|
true); |
|
|
|
return IB_SMI_DISCARD; |
|
} |
|
|
|
return IB_SMI_HANDLE; |
|
} |
|
|
|
static enum smi_action |
|
handle_smi(struct ib_mad_port_private *port_priv, |
|
struct ib_mad_qp_info *qp_info, |
|
struct ib_wc *wc, |
|
int port_num, |
|
struct ib_mad_private *recv, |
|
struct ib_mad_private *response, |
|
bool opa) |
|
{ |
|
struct ib_mad_hdr *mad_hdr = (struct ib_mad_hdr *)recv->mad; |
|
|
|
if (opa && mad_hdr->base_version == OPA_MGMT_BASE_VERSION && |
|
mad_hdr->class_version == OPA_SM_CLASS_VERSION) |
|
return handle_opa_smi(port_priv, qp_info, wc, port_num, recv, |
|
response); |
|
|
|
return handle_ib_smi(port_priv, qp_info, wc, port_num, recv, response); |
|
} |
|
|
|
static void ib_mad_recv_done(struct ib_cq *cq, struct ib_wc *wc) |
|
{ |
|
struct ib_mad_port_private *port_priv = cq->cq_context; |
|
struct ib_mad_list_head *mad_list = |
|
container_of(wc->wr_cqe, struct ib_mad_list_head, cqe); |
|
struct ib_mad_qp_info *qp_info; |
|
struct ib_mad_private_header *mad_priv_hdr; |
|
struct ib_mad_private *recv, *response = NULL; |
|
struct ib_mad_agent_private *mad_agent; |
|
int port_num; |
|
int ret = IB_MAD_RESULT_SUCCESS; |
|
size_t mad_size; |
|
u16 resp_mad_pkey_index = 0; |
|
bool opa; |
|
|
|
if (list_empty_careful(&port_priv->port_list)) |
|
return; |
|
|
|
if (wc->status != IB_WC_SUCCESS) { |
|
/* |
|
* Receive errors indicate that the QP has entered the error |
|
* state - error handling/shutdown code will cleanup |
|
*/ |
|
return; |
|
} |
|
|
|
qp_info = mad_list->mad_queue->qp_info; |
|
dequeue_mad(mad_list); |
|
|
|
opa = rdma_cap_opa_mad(qp_info->port_priv->device, |
|
qp_info->port_priv->port_num); |
|
|
|
mad_priv_hdr = container_of(mad_list, struct ib_mad_private_header, |
|
mad_list); |
|
recv = container_of(mad_priv_hdr, struct ib_mad_private, header); |
|
ib_dma_unmap_single(port_priv->device, |
|
recv->header.mapping, |
|
mad_priv_dma_size(recv), |
|
DMA_FROM_DEVICE); |
|
|
|
/* Setup MAD receive work completion from "normal" work completion */ |
|
recv->header.wc = *wc; |
|
recv->header.recv_wc.wc = &recv->header.wc; |
|
|
|
if (opa && ((struct ib_mad_hdr *)(recv->mad))->base_version == OPA_MGMT_BASE_VERSION) { |
|
recv->header.recv_wc.mad_len = wc->byte_len - sizeof(struct ib_grh); |
|
recv->header.recv_wc.mad_seg_size = sizeof(struct opa_mad); |
|
} else { |
|
recv->header.recv_wc.mad_len = sizeof(struct ib_mad); |
|
recv->header.recv_wc.mad_seg_size = sizeof(struct ib_mad); |
|
} |
|
|
|
recv->header.recv_wc.recv_buf.mad = (struct ib_mad *)recv->mad; |
|
recv->header.recv_wc.recv_buf.grh = &recv->grh; |
|
|
|
/* Validate MAD */ |
|
if (!validate_mad((const struct ib_mad_hdr *)recv->mad, qp_info, opa)) |
|
goto out; |
|
|
|
trace_ib_mad_recv_done_handler(qp_info, wc, |
|
(struct ib_mad_hdr *)recv->mad); |
|
|
|
mad_size = recv->mad_size; |
|
response = alloc_mad_private(mad_size, GFP_KERNEL); |
|
if (!response) |
|
goto out; |
|
|
|
if (rdma_cap_ib_switch(port_priv->device)) |
|
port_num = wc->port_num; |
|
else |
|
port_num = port_priv->port_num; |
|
|
|
if (((struct ib_mad_hdr *)recv->mad)->mgmt_class == |
|
IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { |
|
if (handle_smi(port_priv, qp_info, wc, port_num, recv, |
|
response, opa) |
|
== IB_SMI_DISCARD) |
|
goto out; |
|
} |
|
|
|
/* Give driver "right of first refusal" on incoming MAD */ |
|
if (port_priv->device->ops.process_mad) { |
|
ret = port_priv->device->ops.process_mad( |
|
port_priv->device, 0, port_priv->port_num, wc, |
|
&recv->grh, (const struct ib_mad *)recv->mad, |
|
(struct ib_mad *)response->mad, &mad_size, |
|
&resp_mad_pkey_index); |
|
|
|
if (opa) |
|
wc->pkey_index = resp_mad_pkey_index; |
|
|
|
if (ret & IB_MAD_RESULT_SUCCESS) { |
|
if (ret & IB_MAD_RESULT_CONSUMED) |
|
goto out; |
|
if (ret & IB_MAD_RESULT_REPLY) { |
|
agent_send_response((const struct ib_mad_hdr *)response->mad, |
|
&recv->grh, wc, |
|
port_priv->device, |
|
port_num, |
|
qp_info->qp->qp_num, |
|
mad_size, opa); |
|
goto out; |
|
} |
|
} |
|
} |
|
|
|
mad_agent = find_mad_agent(port_priv, (const struct ib_mad_hdr *)recv->mad); |
|
if (mad_agent) { |
|
trace_ib_mad_recv_done_agent(mad_agent); |
|
ib_mad_complete_recv(mad_agent, &recv->header.recv_wc); |
|
/* |
|
* recv is freed up in error cases in ib_mad_complete_recv |
|
* or via recv_handler in ib_mad_complete_recv() |
|
*/ |
|
recv = NULL; |
|
} else if ((ret & IB_MAD_RESULT_SUCCESS) && |
|
generate_unmatched_resp(recv, response, &mad_size, opa)) { |
|
agent_send_response((const struct ib_mad_hdr *)response->mad, &recv->grh, wc, |
|
port_priv->device, port_num, |
|
qp_info->qp->qp_num, mad_size, opa); |
|
} |
|
|
|
out: |
|
/* Post another receive request for this QP */ |
|
if (response) { |
|
ib_mad_post_receive_mads(qp_info, response); |
|
kfree(recv); |
|
} else |
|
ib_mad_post_receive_mads(qp_info, recv); |
|
} |
|
|
|
static void adjust_timeout(struct ib_mad_agent_private *mad_agent_priv) |
|
{ |
|
struct ib_mad_send_wr_private *mad_send_wr; |
|
unsigned long delay; |
|
|
|
if (list_empty(&mad_agent_priv->wait_list)) { |
|
cancel_delayed_work(&mad_agent_priv->timed_work); |
|
} else { |
|
mad_send_wr = list_entry(mad_agent_priv->wait_list.next, |
|
struct ib_mad_send_wr_private, |
|
agent_list); |
|
|
|
if (time_after(mad_agent_priv->timeout, |
|
mad_send_wr->timeout)) { |
|
mad_agent_priv->timeout = mad_send_wr->timeout; |
|
delay = mad_send_wr->timeout - jiffies; |
|
if ((long)delay <= 0) |
|
delay = 1; |
|
mod_delayed_work(mad_agent_priv->qp_info->port_priv->wq, |
|
&mad_agent_priv->timed_work, delay); |
|
} |
|
} |
|
} |
|
|
|
static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr) |
|
{ |
|
struct ib_mad_agent_private *mad_agent_priv; |
|
struct ib_mad_send_wr_private *temp_mad_send_wr; |
|
struct list_head *list_item; |
|
unsigned long delay; |
|
|
|
mad_agent_priv = mad_send_wr->mad_agent_priv; |
|
list_del(&mad_send_wr->agent_list); |
|
|
|
delay = mad_send_wr->timeout; |
|
mad_send_wr->timeout += jiffies; |
|
|
|
if (delay) { |
|
list_for_each_prev(list_item, &mad_agent_priv->wait_list) { |
|
temp_mad_send_wr = list_entry(list_item, |
|
struct ib_mad_send_wr_private, |
|
agent_list); |
|
if (time_after(mad_send_wr->timeout, |
|
temp_mad_send_wr->timeout)) |
|
break; |
|
} |
|
} |
|
else |
|
list_item = &mad_agent_priv->wait_list; |
|
list_add(&mad_send_wr->agent_list, list_item); |
|
|
|
/* Reschedule a work item if we have a shorter timeout */ |
|
if (mad_agent_priv->wait_list.next == &mad_send_wr->agent_list) |
|
mod_delayed_work(mad_agent_priv->qp_info->port_priv->wq, |
|
&mad_agent_priv->timed_work, delay); |
|
} |
|
|
|
void ib_reset_mad_timeout(struct ib_mad_send_wr_private *mad_send_wr, |
|
unsigned long timeout_ms) |
|
{ |
|
mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); |
|
wait_for_response(mad_send_wr); |
|
} |
|
|
|
/* |
|
* Process a send work completion |
|
*/ |
|
void ib_mad_complete_send_wr(struct ib_mad_send_wr_private *mad_send_wr, |
|
struct ib_mad_send_wc *mad_send_wc) |
|
{ |
|
struct ib_mad_agent_private *mad_agent_priv; |
|
unsigned long flags; |
|
int ret; |
|
|
|
mad_agent_priv = mad_send_wr->mad_agent_priv; |
|
spin_lock_irqsave(&mad_agent_priv->lock, flags); |
|
if (ib_mad_kernel_rmpp_agent(&mad_agent_priv->agent)) { |
|
ret = ib_process_rmpp_send_wc(mad_send_wr, mad_send_wc); |
|
if (ret == IB_RMPP_RESULT_CONSUMED) |
|
goto done; |
|
} else |
|
ret = IB_RMPP_RESULT_UNHANDLED; |
|
|
|
if (mad_send_wc->status != IB_WC_SUCCESS && |
|
mad_send_wr->status == IB_WC_SUCCESS) { |
|
mad_send_wr->status = mad_send_wc->status; |
|
mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
|
} |
|
|
|
if (--mad_send_wr->refcount > 0) { |
|
if (mad_send_wr->refcount == 1 && mad_send_wr->timeout && |
|
mad_send_wr->status == IB_WC_SUCCESS) { |
|
wait_for_response(mad_send_wr); |
|
} |
|
goto done; |
|
} |
|
|
|
/* Remove send from MAD agent and notify client of completion */ |
|
list_del(&mad_send_wr->agent_list); |
|
adjust_timeout(mad_agent_priv); |
|
spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
|
|
|
if (mad_send_wr->status != IB_WC_SUCCESS ) |
|
mad_send_wc->status = mad_send_wr->status; |
|
if (ret == IB_RMPP_RESULT_INTERNAL) |
|
ib_rmpp_send_handler(mad_send_wc); |
|
else |
|
mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
|
mad_send_wc); |
|
|
|
/* Release reference on agent taken when sending */ |
|
deref_mad_agent(mad_agent_priv); |
|
return; |
|
done: |
|
spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
|
} |
|
|
|
static void ib_mad_send_done(struct ib_cq *cq, struct ib_wc *wc) |
|
{ |
|
struct ib_mad_port_private *port_priv = cq->cq_context; |
|
struct ib_mad_list_head *mad_list = |
|
container_of(wc->wr_cqe, struct ib_mad_list_head, cqe); |
|
struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr; |
|
struct ib_mad_qp_info *qp_info; |
|
struct ib_mad_queue *send_queue; |
|
struct ib_mad_send_wc mad_send_wc; |
|
unsigned long flags; |
|
int ret; |
|
|
|
if (list_empty_careful(&port_priv->port_list)) |
|
return; |
|
|
|
if (wc->status != IB_WC_SUCCESS) { |
|
if (!ib_mad_send_error(port_priv, wc)) |
|
return; |
|
} |
|
|
|
mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, |
|
mad_list); |
|
send_queue = mad_list->mad_queue; |
|
qp_info = send_queue->qp_info; |
|
|
|
trace_ib_mad_send_done_agent(mad_send_wr->mad_agent_priv); |
|
trace_ib_mad_send_done_handler(mad_send_wr, wc); |
|
|
|
retry: |
|
ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device, |
|
mad_send_wr->header_mapping, |
|
mad_send_wr->sg_list[0].length, DMA_TO_DEVICE); |
|
ib_dma_unmap_single(mad_send_wr->send_buf.mad_agent->device, |
|
mad_send_wr->payload_mapping, |
|
mad_send_wr->sg_list[1].length, DMA_TO_DEVICE); |
|
queued_send_wr = NULL; |
|
spin_lock_irqsave(&send_queue->lock, flags); |
|
list_del(&mad_list->list); |
|
|
|
/* Move queued send to the send queue */ |
|
if (send_queue->count-- > send_queue->max_active) { |
|
mad_list = container_of(qp_info->overflow_list.next, |
|
struct ib_mad_list_head, list); |
|
queued_send_wr = container_of(mad_list, |
|
struct ib_mad_send_wr_private, |
|
mad_list); |
|
list_move_tail(&mad_list->list, &send_queue->list); |
|
} |
|
spin_unlock_irqrestore(&send_queue->lock, flags); |
|
|
|
mad_send_wc.send_buf = &mad_send_wr->send_buf; |
|
mad_send_wc.status = wc->status; |
|
mad_send_wc.vendor_err = wc->vendor_err; |
|
ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
|
|
|
if (queued_send_wr) { |
|
trace_ib_mad_send_done_resend(queued_send_wr, qp_info); |
|
ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr.wr, |
|
NULL); |
|
if (ret) { |
|
dev_err(&port_priv->device->dev, |
|
"ib_post_send failed: %d\n", ret); |
|
mad_send_wr = queued_send_wr; |
|
wc->status = IB_WC_LOC_QP_OP_ERR; |
|
goto retry; |
|
} |
|
} |
|
} |
|
|
|
static void mark_sends_for_retry(struct ib_mad_qp_info *qp_info) |
|
{ |
|
struct ib_mad_send_wr_private *mad_send_wr; |
|
struct ib_mad_list_head *mad_list; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&qp_info->send_queue.lock, flags); |
|
list_for_each_entry(mad_list, &qp_info->send_queue.list, list) { |
|
mad_send_wr = container_of(mad_list, |
|
struct ib_mad_send_wr_private, |
|
mad_list); |
|
mad_send_wr->retry = 1; |
|
} |
|
spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); |
|
} |
|
|
|
static bool ib_mad_send_error(struct ib_mad_port_private *port_priv, |
|
struct ib_wc *wc) |
|
{ |
|
struct ib_mad_list_head *mad_list = |
|
container_of(wc->wr_cqe, struct ib_mad_list_head, cqe); |
|
struct ib_mad_qp_info *qp_info = mad_list->mad_queue->qp_info; |
|
struct ib_mad_send_wr_private *mad_send_wr; |
|
int ret; |
|
|
|
/* |
|
* Send errors will transition the QP to SQE - move |
|
* QP to RTS and repost flushed work requests |
|
*/ |
|
mad_send_wr = container_of(mad_list, struct ib_mad_send_wr_private, |
|
mad_list); |
|
if (wc->status == IB_WC_WR_FLUSH_ERR) { |
|
if (mad_send_wr->retry) { |
|
/* Repost send */ |
|
mad_send_wr->retry = 0; |
|
trace_ib_mad_error_handler(mad_send_wr, qp_info); |
|
ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr.wr, |
|
NULL); |
|
if (!ret) |
|
return false; |
|
} |
|
} else { |
|
struct ib_qp_attr *attr; |
|
|
|
/* Transition QP to RTS and fail offending send */ |
|
attr = kmalloc(sizeof *attr, GFP_KERNEL); |
|
if (attr) { |
|
attr->qp_state = IB_QPS_RTS; |
|
attr->cur_qp_state = IB_QPS_SQE; |
|
ret = ib_modify_qp(qp_info->qp, attr, |
|
IB_QP_STATE | IB_QP_CUR_STATE); |
|
kfree(attr); |
|
if (ret) |
|
dev_err(&port_priv->device->dev, |
|
"%s - ib_modify_qp to RTS: %d\n", |
|
__func__, ret); |
|
else |
|
mark_sends_for_retry(qp_info); |
|
} |
|
} |
|
|
|
return true; |
|
} |
|
|
|
static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv) |
|
{ |
|
unsigned long flags; |
|
struct ib_mad_send_wr_private *mad_send_wr, *temp_mad_send_wr; |
|
struct ib_mad_send_wc mad_send_wc; |
|
struct list_head cancel_list; |
|
|
|
INIT_LIST_HEAD(&cancel_list); |
|
|
|
spin_lock_irqsave(&mad_agent_priv->lock, flags); |
|
list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, |
|
&mad_agent_priv->send_list, agent_list) { |
|
if (mad_send_wr->status == IB_WC_SUCCESS) { |
|
mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
|
mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
|
} |
|
} |
|
|
|
/* Empty wait list to prevent receives from finding a request */ |
|
list_splice_init(&mad_agent_priv->wait_list, &cancel_list); |
|
spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
|
|
|
/* Report all cancelled requests */ |
|
mad_send_wc.status = IB_WC_WR_FLUSH_ERR; |
|
mad_send_wc.vendor_err = 0; |
|
|
|
list_for_each_entry_safe(mad_send_wr, temp_mad_send_wr, |
|
&cancel_list, agent_list) { |
|
mad_send_wc.send_buf = &mad_send_wr->send_buf; |
|
list_del(&mad_send_wr->agent_list); |
|
mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
|
&mad_send_wc); |
|
deref_mad_agent(mad_agent_priv); |
|
} |
|
} |
|
|
|
static struct ib_mad_send_wr_private* |
|
find_send_wr(struct ib_mad_agent_private *mad_agent_priv, |
|
struct ib_mad_send_buf *send_buf) |
|
{ |
|
struct ib_mad_send_wr_private *mad_send_wr; |
|
|
|
list_for_each_entry(mad_send_wr, &mad_agent_priv->wait_list, |
|
agent_list) { |
|
if (&mad_send_wr->send_buf == send_buf) |
|
return mad_send_wr; |
|
} |
|
|
|
list_for_each_entry(mad_send_wr, &mad_agent_priv->send_list, |
|
agent_list) { |
|
if (is_rmpp_data_mad(mad_agent_priv, |
|
mad_send_wr->send_buf.mad) && |
|
&mad_send_wr->send_buf == send_buf) |
|
return mad_send_wr; |
|
} |
|
return NULL; |
|
} |
|
|
|
int ib_modify_mad(struct ib_mad_agent *mad_agent, |
|
struct ib_mad_send_buf *send_buf, u32 timeout_ms) |
|
{ |
|
struct ib_mad_agent_private *mad_agent_priv; |
|
struct ib_mad_send_wr_private *mad_send_wr; |
|
unsigned long flags; |
|
int active; |
|
|
|
mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, |
|
agent); |
|
spin_lock_irqsave(&mad_agent_priv->lock, flags); |
|
mad_send_wr = find_send_wr(mad_agent_priv, send_buf); |
|
if (!mad_send_wr || mad_send_wr->status != IB_WC_SUCCESS) { |
|
spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
|
return -EINVAL; |
|
} |
|
|
|
active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1); |
|
if (!timeout_ms) { |
|
mad_send_wr->status = IB_WC_WR_FLUSH_ERR; |
|
mad_send_wr->refcount -= (mad_send_wr->timeout > 0); |
|
} |
|
|
|
mad_send_wr->send_buf.timeout_ms = timeout_ms; |
|
if (active) |
|
mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); |
|
else |
|
ib_reset_mad_timeout(mad_send_wr, timeout_ms); |
|
|
|
spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
|
return 0; |
|
} |
|
EXPORT_SYMBOL(ib_modify_mad); |
|
|
|
void ib_cancel_mad(struct ib_mad_agent *mad_agent, |
|
struct ib_mad_send_buf *send_buf) |
|
{ |
|
ib_modify_mad(mad_agent, send_buf, 0); |
|
} |
|
EXPORT_SYMBOL(ib_cancel_mad); |
|
|
|
static void local_completions(struct work_struct *work) |
|
{ |
|
struct ib_mad_agent_private *mad_agent_priv; |
|
struct ib_mad_local_private *local; |
|
struct ib_mad_agent_private *recv_mad_agent; |
|
unsigned long flags; |
|
int free_mad; |
|
struct ib_wc wc; |
|
struct ib_mad_send_wc mad_send_wc; |
|
bool opa; |
|
|
|
mad_agent_priv = |
|
container_of(work, struct ib_mad_agent_private, local_work); |
|
|
|
opa = rdma_cap_opa_mad(mad_agent_priv->qp_info->port_priv->device, |
|
mad_agent_priv->qp_info->port_priv->port_num); |
|
|
|
spin_lock_irqsave(&mad_agent_priv->lock, flags); |
|
while (!list_empty(&mad_agent_priv->local_list)) { |
|
local = list_entry(mad_agent_priv->local_list.next, |
|
struct ib_mad_local_private, |
|
completion_list); |
|
list_del(&local->completion_list); |
|
spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
|
free_mad = 0; |
|
if (local->mad_priv) { |
|
u8 base_version; |
|
recv_mad_agent = local->recv_mad_agent; |
|
if (!recv_mad_agent) { |
|
dev_err(&mad_agent_priv->agent.device->dev, |
|
"No receive MAD agent for local completion\n"); |
|
free_mad = 1; |
|
goto local_send_completion; |
|
} |
|
|
|
/* |
|
* Defined behavior is to complete response |
|
* before request |
|
*/ |
|
build_smp_wc(recv_mad_agent->agent.qp, |
|
local->mad_send_wr->send_wr.wr.wr_cqe, |
|
be16_to_cpu(IB_LID_PERMISSIVE), |
|
local->mad_send_wr->send_wr.pkey_index, |
|
recv_mad_agent->agent.port_num, &wc); |
|
|
|
local->mad_priv->header.recv_wc.wc = &wc; |
|
|
|
base_version = ((struct ib_mad_hdr *)(local->mad_priv->mad))->base_version; |
|
if (opa && base_version == OPA_MGMT_BASE_VERSION) { |
|
local->mad_priv->header.recv_wc.mad_len = local->return_wc_byte_len; |
|
local->mad_priv->header.recv_wc.mad_seg_size = sizeof(struct opa_mad); |
|
} else { |
|
local->mad_priv->header.recv_wc.mad_len = sizeof(struct ib_mad); |
|
local->mad_priv->header.recv_wc.mad_seg_size = sizeof(struct ib_mad); |
|
} |
|
|
|
INIT_LIST_HEAD(&local->mad_priv->header.recv_wc.rmpp_list); |
|
list_add(&local->mad_priv->header.recv_wc.recv_buf.list, |
|
&local->mad_priv->header.recv_wc.rmpp_list); |
|
local->mad_priv->header.recv_wc.recv_buf.grh = NULL; |
|
local->mad_priv->header.recv_wc.recv_buf.mad = |
|
(struct ib_mad *)local->mad_priv->mad; |
|
recv_mad_agent->agent.recv_handler( |
|
&recv_mad_agent->agent, |
|
&local->mad_send_wr->send_buf, |
|
&local->mad_priv->header.recv_wc); |
|
spin_lock_irqsave(&recv_mad_agent->lock, flags); |
|
deref_mad_agent(recv_mad_agent); |
|
spin_unlock_irqrestore(&recv_mad_agent->lock, flags); |
|
} |
|
|
|
local_send_completion: |
|
/* Complete send */ |
|
mad_send_wc.status = IB_WC_SUCCESS; |
|
mad_send_wc.vendor_err = 0; |
|
mad_send_wc.send_buf = &local->mad_send_wr->send_buf; |
|
mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
|
&mad_send_wc); |
|
|
|
spin_lock_irqsave(&mad_agent_priv->lock, flags); |
|
deref_mad_agent(mad_agent_priv); |
|
if (free_mad) |
|
kfree(local->mad_priv); |
|
kfree(local); |
|
} |
|
spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
|
} |
|
|
|
static int retry_send(struct ib_mad_send_wr_private *mad_send_wr) |
|
{ |
|
int ret; |
|
|
|
if (!mad_send_wr->retries_left) |
|
return -ETIMEDOUT; |
|
|
|
mad_send_wr->retries_left--; |
|
mad_send_wr->send_buf.retries++; |
|
|
|
mad_send_wr->timeout = msecs_to_jiffies(mad_send_wr->send_buf.timeout_ms); |
|
|
|
if (ib_mad_kernel_rmpp_agent(&mad_send_wr->mad_agent_priv->agent)) { |
|
ret = ib_retry_rmpp(mad_send_wr); |
|
switch (ret) { |
|
case IB_RMPP_RESULT_UNHANDLED: |
|
ret = ib_send_mad(mad_send_wr); |
|
break; |
|
case IB_RMPP_RESULT_CONSUMED: |
|
ret = 0; |
|
break; |
|
default: |
|
ret = -ECOMM; |
|
break; |
|
} |
|
} else |
|
ret = ib_send_mad(mad_send_wr); |
|
|
|
if (!ret) { |
|
mad_send_wr->refcount++; |
|
list_add_tail(&mad_send_wr->agent_list, |
|
&mad_send_wr->mad_agent_priv->send_list); |
|
} |
|
return ret; |
|
} |
|
|
|
static void timeout_sends(struct work_struct *work) |
|
{ |
|
struct ib_mad_agent_private *mad_agent_priv; |
|
struct ib_mad_send_wr_private *mad_send_wr; |
|
struct ib_mad_send_wc mad_send_wc; |
|
unsigned long flags, delay; |
|
|
|
mad_agent_priv = container_of(work, struct ib_mad_agent_private, |
|
timed_work.work); |
|
mad_send_wc.vendor_err = 0; |
|
|
|
spin_lock_irqsave(&mad_agent_priv->lock, flags); |
|
while (!list_empty(&mad_agent_priv->wait_list)) { |
|
mad_send_wr = list_entry(mad_agent_priv->wait_list.next, |
|
struct ib_mad_send_wr_private, |
|
agent_list); |
|
|
|
if (time_after(mad_send_wr->timeout, jiffies)) { |
|
delay = mad_send_wr->timeout - jiffies; |
|
if ((long)delay <= 0) |
|
delay = 1; |
|
queue_delayed_work(mad_agent_priv->qp_info-> |
|
port_priv->wq, |
|
&mad_agent_priv->timed_work, delay); |
|
break; |
|
} |
|
|
|
list_del(&mad_send_wr->agent_list); |
|
if (mad_send_wr->status == IB_WC_SUCCESS && |
|
!retry_send(mad_send_wr)) |
|
continue; |
|
|
|
spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
|
|
|
if (mad_send_wr->status == IB_WC_SUCCESS) |
|
mad_send_wc.status = IB_WC_RESP_TIMEOUT_ERR; |
|
else |
|
mad_send_wc.status = mad_send_wr->status; |
|
mad_send_wc.send_buf = &mad_send_wr->send_buf; |
|
mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
|
&mad_send_wc); |
|
|
|
deref_mad_agent(mad_agent_priv); |
|
spin_lock_irqsave(&mad_agent_priv->lock, flags); |
|
} |
|
spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
|
} |
|
|
|
/* |
|
* Allocate receive MADs and post receive WRs for them |
|
*/ |
|
static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, |
|
struct ib_mad_private *mad) |
|
{ |
|
unsigned long flags; |
|
int post, ret; |
|
struct ib_mad_private *mad_priv; |
|
struct ib_sge sg_list; |
|
struct ib_recv_wr recv_wr; |
|
struct ib_mad_queue *recv_queue = &qp_info->recv_queue; |
|
|
|
/* Initialize common scatter list fields */ |
|
sg_list.lkey = qp_info->port_priv->pd->local_dma_lkey; |
|
|
|
/* Initialize common receive WR fields */ |
|
recv_wr.next = NULL; |
|
recv_wr.sg_list = &sg_list; |
|
recv_wr.num_sge = 1; |
|
|
|
do { |
|
/* Allocate and map receive buffer */ |
|
if (mad) { |
|
mad_priv = mad; |
|
mad = NULL; |
|
} else { |
|
mad_priv = alloc_mad_private(port_mad_size(qp_info->port_priv), |
|
GFP_ATOMIC); |
|
if (!mad_priv) { |
|
ret = -ENOMEM; |
|
break; |
|
} |
|
} |
|
sg_list.length = mad_priv_dma_size(mad_priv); |
|
sg_list.addr = ib_dma_map_single(qp_info->port_priv->device, |
|
&mad_priv->grh, |
|
mad_priv_dma_size(mad_priv), |
|
DMA_FROM_DEVICE); |
|
if (unlikely(ib_dma_mapping_error(qp_info->port_priv->device, |
|
sg_list.addr))) { |
|
kfree(mad_priv); |
|
ret = -ENOMEM; |
|
break; |
|
} |
|
mad_priv->header.mapping = sg_list.addr; |
|
mad_priv->header.mad_list.mad_queue = recv_queue; |
|
mad_priv->header.mad_list.cqe.done = ib_mad_recv_done; |
|
recv_wr.wr_cqe = &mad_priv->header.mad_list.cqe; |
|
|
|
/* Post receive WR */ |
|
spin_lock_irqsave(&recv_queue->lock, flags); |
|
post = (++recv_queue->count < recv_queue->max_active); |
|
list_add_tail(&mad_priv->header.mad_list.list, &recv_queue->list); |
|
spin_unlock_irqrestore(&recv_queue->lock, flags); |
|
ret = ib_post_recv(qp_info->qp, &recv_wr, NULL); |
|
if (ret) { |
|
spin_lock_irqsave(&recv_queue->lock, flags); |
|
list_del(&mad_priv->header.mad_list.list); |
|
recv_queue->count--; |
|
spin_unlock_irqrestore(&recv_queue->lock, flags); |
|
ib_dma_unmap_single(qp_info->port_priv->device, |
|
mad_priv->header.mapping, |
|
mad_priv_dma_size(mad_priv), |
|
DMA_FROM_DEVICE); |
|
kfree(mad_priv); |
|
dev_err(&qp_info->port_priv->device->dev, |
|
"ib_post_recv failed: %d\n", ret); |
|
break; |
|
} |
|
} while (post); |
|
|
|
return ret; |
|
} |
|
|
|
/* |
|
* Return all the posted receive MADs |
|
*/ |
|
static void cleanup_recv_queue(struct ib_mad_qp_info *qp_info) |
|
{ |
|
struct ib_mad_private_header *mad_priv_hdr; |
|
struct ib_mad_private *recv; |
|
struct ib_mad_list_head *mad_list; |
|
|
|
if (!qp_info->qp) |
|
return; |
|
|
|
while (!list_empty(&qp_info->recv_queue.list)) { |
|
|
|
mad_list = list_entry(qp_info->recv_queue.list.next, |
|
struct ib_mad_list_head, list); |
|
mad_priv_hdr = container_of(mad_list, |
|
struct ib_mad_private_header, |
|
mad_list); |
|
recv = container_of(mad_priv_hdr, struct ib_mad_private, |
|
header); |
|
|
|
/* Remove from posted receive MAD list */ |
|
list_del(&mad_list->list); |
|
|
|
ib_dma_unmap_single(qp_info->port_priv->device, |
|
recv->header.mapping, |
|
mad_priv_dma_size(recv), |
|
DMA_FROM_DEVICE); |
|
kfree(recv); |
|
} |
|
|
|
qp_info->recv_queue.count = 0; |
|
} |
|
|
|
/* |
|
* Start the port |
|
*/ |
|
static int ib_mad_port_start(struct ib_mad_port_private *port_priv) |
|
{ |
|
int ret, i; |
|
struct ib_qp_attr *attr; |
|
struct ib_qp *qp; |
|
u16 pkey_index; |
|
|
|
attr = kmalloc(sizeof *attr, GFP_KERNEL); |
|
if (!attr) |
|
return -ENOMEM; |
|
|
|
ret = ib_find_pkey(port_priv->device, port_priv->port_num, |
|
IB_DEFAULT_PKEY_FULL, &pkey_index); |
|
if (ret) |
|
pkey_index = 0; |
|
|
|
for (i = 0; i < IB_MAD_QPS_CORE; i++) { |
|
qp = port_priv->qp_info[i].qp; |
|
if (!qp) |
|
continue; |
|
|
|
/* |
|
* PKey index for QP1 is irrelevant but |
|
* one is needed for the Reset to Init transition |
|
*/ |
|
attr->qp_state = IB_QPS_INIT; |
|
attr->pkey_index = pkey_index; |
|
attr->qkey = (qp->qp_num == 0) ? 0 : IB_QP1_QKEY; |
|
ret = ib_modify_qp(qp, attr, IB_QP_STATE | |
|
IB_QP_PKEY_INDEX | IB_QP_QKEY); |
|
if (ret) { |
|
dev_err(&port_priv->device->dev, |
|
"Couldn't change QP%d state to INIT: %d\n", |
|
i, ret); |
|
goto out; |
|
} |
|
|
|
attr->qp_state = IB_QPS_RTR; |
|
ret = ib_modify_qp(qp, attr, IB_QP_STATE); |
|
if (ret) { |
|
dev_err(&port_priv->device->dev, |
|
"Couldn't change QP%d state to RTR: %d\n", |
|
i, ret); |
|
goto out; |
|
} |
|
|
|
attr->qp_state = IB_QPS_RTS; |
|
attr->sq_psn = IB_MAD_SEND_Q_PSN; |
|
ret = ib_modify_qp(qp, attr, IB_QP_STATE | IB_QP_SQ_PSN); |
|
if (ret) { |
|
dev_err(&port_priv->device->dev, |
|
"Couldn't change QP%d state to RTS: %d\n", |
|
i, ret); |
|
goto out; |
|
} |
|
} |
|
|
|
ret = ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); |
|
if (ret) { |
|
dev_err(&port_priv->device->dev, |
|
"Failed to request completion notification: %d\n", |
|
ret); |
|
goto out; |
|
} |
|
|
|
for (i = 0; i < IB_MAD_QPS_CORE; i++) { |
|
if (!port_priv->qp_info[i].qp) |
|
continue; |
|
|
|
ret = ib_mad_post_receive_mads(&port_priv->qp_info[i], NULL); |
|
if (ret) { |
|
dev_err(&port_priv->device->dev, |
|
"Couldn't post receive WRs\n"); |
|
goto out; |
|
} |
|
} |
|
out: |
|
kfree(attr); |
|
return ret; |
|
} |
|
|
|
static void qp_event_handler(struct ib_event *event, void *qp_context) |
|
{ |
|
struct ib_mad_qp_info *qp_info = qp_context; |
|
|
|
/* It's worse than that! He's dead, Jim! */ |
|
dev_err(&qp_info->port_priv->device->dev, |
|
"Fatal error (%d) on MAD QP (%d)\n", |
|
event->event, qp_info->qp->qp_num); |
|
} |
|
|
|
static void init_mad_queue(struct ib_mad_qp_info *qp_info, |
|
struct ib_mad_queue *mad_queue) |
|
{ |
|
mad_queue->qp_info = qp_info; |
|
mad_queue->count = 0; |
|
spin_lock_init(&mad_queue->lock); |
|
INIT_LIST_HEAD(&mad_queue->list); |
|
} |
|
|
|
static void init_mad_qp(struct ib_mad_port_private *port_priv, |
|
struct ib_mad_qp_info *qp_info) |
|
{ |
|
qp_info->port_priv = port_priv; |
|
init_mad_queue(qp_info, &qp_info->send_queue); |
|
init_mad_queue(qp_info, &qp_info->recv_queue); |
|
INIT_LIST_HEAD(&qp_info->overflow_list); |
|
} |
|
|
|
static int create_mad_qp(struct ib_mad_qp_info *qp_info, |
|
enum ib_qp_type qp_type) |
|
{ |
|
struct ib_qp_init_attr qp_init_attr; |
|
int ret; |
|
|
|
memset(&qp_init_attr, 0, sizeof qp_init_attr); |
|
qp_init_attr.send_cq = qp_info->port_priv->cq; |
|
qp_init_attr.recv_cq = qp_info->port_priv->cq; |
|
qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR; |
|
qp_init_attr.cap.max_send_wr = mad_sendq_size; |
|
qp_init_attr.cap.max_recv_wr = mad_recvq_size; |
|
qp_init_attr.cap.max_send_sge = IB_MAD_SEND_REQ_MAX_SG; |
|
qp_init_attr.cap.max_recv_sge = IB_MAD_RECV_REQ_MAX_SG; |
|
qp_init_attr.qp_type = qp_type; |
|
qp_init_attr.port_num = qp_info->port_priv->port_num; |
|
qp_init_attr.qp_context = qp_info; |
|
qp_init_attr.event_handler = qp_event_handler; |
|
qp_info->qp = ib_create_qp(qp_info->port_priv->pd, &qp_init_attr); |
|
if (IS_ERR(qp_info->qp)) { |
|
dev_err(&qp_info->port_priv->device->dev, |
|
"Couldn't create ib_mad QP%d\n", |
|
get_spl_qp_index(qp_type)); |
|
ret = PTR_ERR(qp_info->qp); |
|
goto error; |
|
} |
|
/* Use minimum queue sizes unless the CQ is resized */ |
|
qp_info->send_queue.max_active = mad_sendq_size; |
|
qp_info->recv_queue.max_active = mad_recvq_size; |
|
return 0; |
|
|
|
error: |
|
return ret; |
|
} |
|
|
|
static void destroy_mad_qp(struct ib_mad_qp_info *qp_info) |
|
{ |
|
if (!qp_info->qp) |
|
return; |
|
|
|
ib_destroy_qp(qp_info->qp); |
|
} |
|
|
|
/* |
|
* Open the port |
|
* Create the QP, PD, MR, and CQ if needed |
|
*/ |
|
static int ib_mad_port_open(struct ib_device *device, |
|
int port_num) |
|
{ |
|
int ret, cq_size; |
|
struct ib_mad_port_private *port_priv; |
|
unsigned long flags; |
|
char name[sizeof "ib_mad123"]; |
|
int has_smi; |
|
|
|
if (WARN_ON(rdma_max_mad_size(device, port_num) < IB_MGMT_MAD_SIZE)) |
|
return -EFAULT; |
|
|
|
if (WARN_ON(rdma_cap_opa_mad(device, port_num) && |
|
rdma_max_mad_size(device, port_num) < OPA_MGMT_MAD_SIZE)) |
|
return -EFAULT; |
|
|
|
/* Create new device info */ |
|
port_priv = kzalloc(sizeof *port_priv, GFP_KERNEL); |
|
if (!port_priv) |
|
return -ENOMEM; |
|
|
|
port_priv->device = device; |
|
port_priv->port_num = port_num; |
|
spin_lock_init(&port_priv->reg_lock); |
|
init_mad_qp(port_priv, &port_priv->qp_info[0]); |
|
init_mad_qp(port_priv, &port_priv->qp_info[1]); |
|
|
|
cq_size = mad_sendq_size + mad_recvq_size; |
|
has_smi = rdma_cap_ib_smi(device, port_num); |
|
if (has_smi) |
|
cq_size *= 2; |
|
|
|
port_priv->pd = ib_alloc_pd(device, 0); |
|
if (IS_ERR(port_priv->pd)) { |
|
dev_err(&device->dev, "Couldn't create ib_mad PD\n"); |
|
ret = PTR_ERR(port_priv->pd); |
|
goto error3; |
|
} |
|
|
|
port_priv->cq = ib_alloc_cq(port_priv->device, port_priv, cq_size, 0, |
|
IB_POLL_UNBOUND_WORKQUEUE); |
|
if (IS_ERR(port_priv->cq)) { |
|
dev_err(&device->dev, "Couldn't create ib_mad CQ\n"); |
|
ret = PTR_ERR(port_priv->cq); |
|
goto error4; |
|
} |
|
|
|
if (has_smi) { |
|
ret = create_mad_qp(&port_priv->qp_info[0], IB_QPT_SMI); |
|
if (ret) |
|
goto error6; |
|
} |
|
ret = create_mad_qp(&port_priv->qp_info[1], IB_QPT_GSI); |
|
if (ret) |
|
goto error7; |
|
|
|
snprintf(name, sizeof name, "ib_mad%d", port_num); |
|
port_priv->wq = alloc_ordered_workqueue(name, WQ_MEM_RECLAIM); |
|
if (!port_priv->wq) { |
|
ret = -ENOMEM; |
|
goto error8; |
|
} |
|
|
|
spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
|
list_add_tail(&port_priv->port_list, &ib_mad_port_list); |
|
spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
|
|
|
ret = ib_mad_port_start(port_priv); |
|
if (ret) { |
|
dev_err(&device->dev, "Couldn't start port\n"); |
|
goto error9; |
|
} |
|
|
|
return 0; |
|
|
|
error9: |
|
spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
|
list_del_init(&port_priv->port_list); |
|
spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
|
|
|
destroy_workqueue(port_priv->wq); |
|
error8: |
|
destroy_mad_qp(&port_priv->qp_info[1]); |
|
error7: |
|
destroy_mad_qp(&port_priv->qp_info[0]); |
|
error6: |
|
ib_free_cq(port_priv->cq); |
|
cleanup_recv_queue(&port_priv->qp_info[1]); |
|
cleanup_recv_queue(&port_priv->qp_info[0]); |
|
error4: |
|
ib_dealloc_pd(port_priv->pd); |
|
error3: |
|
kfree(port_priv); |
|
|
|
return ret; |
|
} |
|
|
|
/* |
|
* Close the port |
|
* If there are no classes using the port, free the port |
|
* resources (CQ, MR, PD, QP) and remove the port's info structure |
|
*/ |
|
static int ib_mad_port_close(struct ib_device *device, int port_num) |
|
{ |
|
struct ib_mad_port_private *port_priv; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
|
port_priv = __ib_get_mad_port(device, port_num); |
|
if (port_priv == NULL) { |
|
spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
|
dev_err(&device->dev, "Port %d not found\n", port_num); |
|
return -ENODEV; |
|
} |
|
list_del_init(&port_priv->port_list); |
|
spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
|
|
|
destroy_workqueue(port_priv->wq); |
|
destroy_mad_qp(&port_priv->qp_info[1]); |
|
destroy_mad_qp(&port_priv->qp_info[0]); |
|
ib_free_cq(port_priv->cq); |
|
ib_dealloc_pd(port_priv->pd); |
|
cleanup_recv_queue(&port_priv->qp_info[1]); |
|
cleanup_recv_queue(&port_priv->qp_info[0]); |
|
/* XXX: Handle deallocation of MAD registration tables */ |
|
|
|
kfree(port_priv); |
|
|
|
return 0; |
|
} |
|
|
|
static int ib_mad_init_device(struct ib_device *device) |
|
{ |
|
int start, i; |
|
unsigned int count = 0; |
|
int ret; |
|
|
|
start = rdma_start_port(device); |
|
|
|
for (i = start; i <= rdma_end_port(device); i++) { |
|
if (!rdma_cap_ib_mad(device, i)) |
|
continue; |
|
|
|
ret = ib_mad_port_open(device, i); |
|
if (ret) { |
|
dev_err(&device->dev, "Couldn't open port %d\n", i); |
|
goto error; |
|
} |
|
ret = ib_agent_port_open(device, i); |
|
if (ret) { |
|
dev_err(&device->dev, |
|
"Couldn't open port %d for agents\n", i); |
|
goto error_agent; |
|
} |
|
count++; |
|
} |
|
if (!count) |
|
return -EOPNOTSUPP; |
|
|
|
return 0; |
|
|
|
error_agent: |
|
if (ib_mad_port_close(device, i)) |
|
dev_err(&device->dev, "Couldn't close port %d\n", i); |
|
|
|
error: |
|
while (--i >= start) { |
|
if (!rdma_cap_ib_mad(device, i)) |
|
continue; |
|
|
|
if (ib_agent_port_close(device, i)) |
|
dev_err(&device->dev, |
|
"Couldn't close port %d for agents\n", i); |
|
if (ib_mad_port_close(device, i)) |
|
dev_err(&device->dev, "Couldn't close port %d\n", i); |
|
} |
|
return ret; |
|
} |
|
|
|
static void ib_mad_remove_device(struct ib_device *device, void *client_data) |
|
{ |
|
unsigned int i; |
|
|
|
rdma_for_each_port (device, i) { |
|
if (!rdma_cap_ib_mad(device, i)) |
|
continue; |
|
|
|
if (ib_agent_port_close(device, i)) |
|
dev_err(&device->dev, |
|
"Couldn't close port %d for agents\n", i); |
|
if (ib_mad_port_close(device, i)) |
|
dev_err(&device->dev, "Couldn't close port %d\n", i); |
|
} |
|
} |
|
|
|
static struct ib_client mad_client = { |
|
.name = "mad", |
|
.add = ib_mad_init_device, |
|
.remove = ib_mad_remove_device |
|
}; |
|
|
|
int ib_mad_init(void) |
|
{ |
|
mad_recvq_size = min(mad_recvq_size, IB_MAD_QP_MAX_SIZE); |
|
mad_recvq_size = max(mad_recvq_size, IB_MAD_QP_MIN_SIZE); |
|
|
|
mad_sendq_size = min(mad_sendq_size, IB_MAD_QP_MAX_SIZE); |
|
mad_sendq_size = max(mad_sendq_size, IB_MAD_QP_MIN_SIZE); |
|
|
|
INIT_LIST_HEAD(&ib_mad_port_list); |
|
|
|
if (ib_register_client(&mad_client)) { |
|
pr_err("Couldn't register ib_mad client\n"); |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
void ib_mad_cleanup(void) |
|
{ |
|
ib_unregister_client(&mad_client); |
|
}
|
|
|