| /* |
| * Copyright (c) 2004-2007 Voltaire, Inc. All rights reserved. |
| * Copyright (c) 2005 Intel Corporation. All rights reserved. |
| * Copyright (c) 2005 Mellanox Technologies Ltd. All rights reserved. |
| * Copyright (c) 2009 HNR Consulting. All rights reserved. |
| * Copyright (c) 2014 Intel Corporation. All rights reserved. |
| * |
| * This software is available to you under a choice of one of two |
| * licenses. You may choose to be licensed under the terms of the GNU |
| * General Public License (GPL) Version 2, available from the file |
| * COPYING in the main directory of this source tree, or the |
| * OpenIB.org BSD license below: |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| * |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/dma-mapping.h> |
| #include <linux/slab.h> |
| #include <linux/module.h> |
| #include <rdma/ib_cache.h> |
| |
| #include "mad_priv.h" |
| #include "mad_rmpp.h" |
| #include "smi.h" |
| #include "opa_smi.h" |
| #include "agent.h" |
| |
| MODULE_LICENSE("Dual BSD/GPL"); |
| MODULE_DESCRIPTION("kernel IB MAD API"); |
| MODULE_AUTHOR("Hal Rosenstock"); |
| MODULE_AUTHOR("Sean Hefty"); |
| |
| static int mad_sendq_size = IB_MAD_QP_SEND_SIZE; |
| static int mad_recvq_size = IB_MAD_QP_RECV_SIZE; |
| |
| module_param_named(send_queue_size, mad_sendq_size, int, 0444); |
| MODULE_PARM_DESC(send_queue_size, "Size of send queue in number of work requests"); |
| module_param_named(recv_queue_size, mad_recvq_size, int, 0444); |
| MODULE_PARM_DESC(recv_queue_size, "Size of receive queue in number of work requests"); |
| |
| static struct list_head ib_mad_port_list; |
| static u32 ib_mad_client_id = 0; |
| |
| /* Port list lock */ |
| static DEFINE_SPINLOCK(ib_mad_port_list_lock); |
| |
| /* Forward declarations */ |
| static int method_in_use(struct ib_mad_mgmt_method_table **method, |
| struct ib_mad_reg_req *mad_reg_req); |
| static void remove_mad_reg_req(struct ib_mad_agent_private *priv); |
| static struct ib_mad_agent_private *find_mad_agent( |
| struct ib_mad_port_private *port_priv, |
| const struct ib_mad_hdr *mad); |
| static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info, |
| struct ib_mad_private *mad); |
| static void cancel_mads(struct ib_mad_agent_private *mad_agent_priv); |
| static void timeout_sends(struct work_struct *work); |
| static void local_completions(struct work_struct *work); |
| static int add_nonoui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
| struct ib_mad_agent_private *agent_priv, |
| u8 mgmt_class); |
| static int add_oui_reg_req(struct ib_mad_reg_req *mad_reg_req, |
| struct ib_mad_agent_private *agent_priv); |
| |
| /* |
| * Returns a ib_mad_port_private structure or NULL for a device/port |
| * Assumes ib_mad_port_list_lock is being held |
| */ |
| static inline struct ib_mad_port_private * |
| __ib_get_mad_port(struct ib_device *device, int port_num) |
| { |
| struct ib_mad_port_private *entry; |
| |
| list_for_each_entry(entry, &ib_mad_port_list, port_list) { |
| if (entry->device == device && entry->port_num == port_num) |
| return entry; |
| } |
| return NULL; |
| } |
| |
| /* |
| * Wrapper function to return a ib_mad_port_private structure or NULL |
| * for a device/port |
| */ |
| static inline struct ib_mad_port_private * |
| ib_get_mad_port(struct ib_device *device, int port_num) |
| { |
| struct ib_mad_port_private *entry; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
| entry = __ib_get_mad_port(device, port_num); |
| spin_unlock_irqrestore(&ib_mad_port_list_lock, flags); |
| |
| return entry; |
| } |
| |
| static inline u8 convert_mgmt_class(u8 mgmt_class) |
| { |
| /* Alias IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE to 0 */ |
| return mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE ? |
| 0 : mgmt_class; |
| } |
| |
| static int get_spl_qp_index(enum ib_qp_type qp_type) |
| { |
| switch (qp_type) |
| { |
| case IB_QPT_SMI: |
| return 0; |
| case IB_QPT_GSI: |
| return 1; |
| default: |
| return -1; |
| } |
| } |
| |
| static int vendor_class_index(u8 mgmt_class) |
| { |
| return mgmt_class - IB_MGMT_CLASS_VENDOR_RANGE2_START; |
| } |
| |
| static int is_vendor_class(u8 mgmt_class) |
| { |
| if ((mgmt_class < IB_MGMT_CLASS_VENDOR_RANGE2_START) || |
| (mgmt_class > IB_MGMT_CLASS_VENDOR_RANGE2_END)) |
| return 0; |
| return 1; |
| } |
| |
| static int is_vendor_oui(char *oui) |
| { |
| if (oui[0] || oui[1] || oui[2]) |
| return 1; |
| return 0; |
| } |
| |
| static int is_vendor_method_in_use( |
| struct ib_mad_mgmt_vendor_class *vendor_class, |
| struct ib_mad_reg_req *mad_reg_req) |
| { |
| struct ib_mad_mgmt_method_table *method; |
| int i; |
| |
| for (i = 0; i < MAX_MGMT_OUI; i++) { |
| if (!memcmp(vendor_class->oui[i], mad_reg_req->oui, 3)) { |
| method = vendor_class->method_table[i]; |
| if (method) { |
| if (method_in_use(&method, mad_reg_req)) |
| return 1; |
| else |
| break; |
| } |
| } |
| } |
| return 0; |
| } |
| |
| int ib_response_mad(const struct ib_mad_hdr *hdr) |
| { |
| return ((hdr->method & IB_MGMT_METHOD_RESP) || |
| (hdr->method == IB_MGMT_METHOD_TRAP_REPRESS) || |
| ((hdr->mgmt_class == IB_MGMT_CLASS_BM) && |
| (hdr->attr_mod & IB_BM_ATTR_MOD_RESP))); |
| } |
| EXPORT_SYMBOL(ib_response_mad); |
| |
| /* |
| * ib_register_mad_agent - Register to send/receive MADs |
| */ |
| struct ib_mad_agent *ib_register_mad_agent(struct ib_device *device, |
| u8 port_num, |
| enum ib_qp_type qp_type, |
| struct ib_mad_reg_req *mad_reg_req, |
| u8 rmpp_version, |
| ib_mad_send_handler send_handler, |
| ib_mad_recv_handler recv_handler, |
| void *context, |
| u32 registration_flags) |
| { |
| struct ib_mad_port_private *port_priv; |
| struct ib_mad_agent *ret = ERR_PTR(-EINVAL); |
| struct ib_mad_agent_private *mad_agent_priv; |
| struct ib_mad_reg_req *reg_req = NULL; |
| struct ib_mad_mgmt_class_table *class; |
| struct ib_mad_mgmt_vendor_class_table *vendor; |
| struct ib_mad_mgmt_vendor_class *vendor_class; |
| struct ib_mad_mgmt_method_table *method; |
| int ret2, qpn; |
| unsigned long flags; |
| u8 mgmt_class, vclass; |
| |
| /* Validate parameters */ |
| qpn = get_spl_qp_index(qp_type); |
| if (qpn == -1) { |
| dev_notice(&device->dev, |
| "ib_register_mad_agent: invalid QP Type %d\n", |
| qp_type); |
| goto error1; |
| } |
| |
| if (rmpp_version && rmpp_version != IB_MGMT_RMPP_VERSION) { |
| dev_notice(&device->dev, |
| "ib_register_mad_agent: invalid RMPP Version %u\n", |
| rmpp_version); |
| goto error1; |
| } |
| |
| /* Validate MAD registration request if supplied */ |
| if (mad_reg_req) { |
| if (mad_reg_req->mgmt_class_version >= MAX_MGMT_VERSION) { |
| dev_notice(&device->dev, |
| "ib_register_mad_agent: invalid Class Version %u\n", |
| mad_reg_req->mgmt_class_version); |
| goto error1; |
| } |
| if (!recv_handler) { |
| dev_notice(&device->dev, |
| "ib_register_mad_agent: no recv_handler\n"); |
| goto error1; |
| } |
| if (mad_reg_req->mgmt_class >= MAX_MGMT_CLASS) { |
| /* |
| * IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE is the only |
| * one in this range currently allowed |
| */ |
| if (mad_reg_req->mgmt_class != |
| IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) { |
| dev_notice(&device->dev, |
| "ib_register_mad_agent: Invalid Mgmt Class 0x%x\n", |
| mad_reg_req->mgmt_class); |
| goto error1; |
| } |
| } else if (mad_reg_req->mgmt_class == 0) { |
| /* |
| * Class 0 is reserved in IBA and is used for |
| * aliasing of IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE |
| */ |
| dev_notice(&device->dev, |
| "ib_register_mad_agent: Invalid Mgmt Class 0\n"); |
| goto error1; |
| } else if (is_vendor_class(mad_reg_req->mgmt_class)) { |
| /* |
| * If class is in "new" vendor range, |
| * ensure supplied OUI is not zero |
| */ |
| if (!is_vendor_oui(mad_reg_req->oui)) { |
| dev_notice(&device->dev, |
| "ib_register_mad_agent: No OUI specified for class 0x%x\n", |
| mad_reg_req->mgmt_class); |
| goto error1; |
| } |
| } |
| /* Make sure class supplied is consistent with RMPP */ |
| if (!ib_is_mad_class_rmpp(mad_reg_req->mgmt_class)) { |
| if (rmpp_version) { |
| dev_notice(&device->dev, |
| "ib_register_mad_agent: RMPP version for non-RMPP class 0x%x\n", |
| mad_reg_req->mgmt_class); |
| goto error1; |
| } |
| } |
| |
| /* Make sure class supplied is consistent with QP type */ |
| if (qp_type == IB_QPT_SMI) { |
| if ((mad_reg_req->mgmt_class != |
| IB_MGMT_CLASS_SUBN_LID_ROUTED) && |
| (mad_reg_req->mgmt_class != |
| IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { |
| dev_notice(&device->dev, |
| "ib_register_mad_agent: Invalid SM QP type: class 0x%x\n", |
| mad_reg_req->mgmt_class); |
| goto error1; |
| } |
| } else { |
| if ((mad_reg_req->mgmt_class == |
| IB_MGMT_CLASS_SUBN_LID_ROUTED) || |
| (mad_reg_req->mgmt_class == |
| IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE)) { |
| dev_notice(&device->dev, |
| "ib_register_mad_agent: Invalid GS QP type: class 0x%x\n", |
| mad_reg_req->mgmt_class); |
| goto error1; |
| } |
| } |
| } else { |
| /* No registration request supplied */ |
| if (!send_handler) |
| goto error1; |
| 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_notice(&device->dev, "ib_register_mad_agent: Invalid port\n"); |
| 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_notice(&device->dev, |
| "ib_register_mad_agent: QP %d not supported\n", 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; |
| } |
| |
| mad_agent_priv->agent.mr = ib_get_dma_mr(port_priv->qp_info[qpn].qp->pd, |
| IB_ACCESS_LOCAL_WRITE); |
| if (IS_ERR(mad_agent_priv->agent.mr)) { |
| ret = ERR_PTR(-ENOMEM); |
| goto error2; |
| } |
| |
| 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; |
| 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; |
| 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; |
| spin_lock_init(&mad_agent_priv->lock); |
| 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); |
| INIT_WORK(&mad_agent_priv->local_work, local_completions); |
| atomic_set(&mad_agent_priv->refcount, 1); |
| init_completion(&mad_agent_priv->comp); |
| |
| spin_lock_irqsave(&port_priv->reg_lock, flags); |
| mad_agent_priv->agent.hi_tid = ++ib_mad_client_id; |
| |
| /* |
| * Make sure MAD registration (if supplied) |
| * is non overlapping with any existing ones |
| */ |
| 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 error4; |
| } |
| } |
| 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 error4; |
| } |
| } |
| ret2 = add_oui_reg_req(mad_reg_req, mad_agent_priv); |
| } |
| if (ret2) { |
| ret = ERR_PTR(ret2); |
| goto error4; |
| } |
| } |
| |
| /* Add mad agent into port's agent list */ |
| list_add_tail(&mad_agent_priv->agent_list, &port_priv->agent_list); |
| spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
| |
| return &mad_agent_priv->agent; |
| |
| error4: |
| spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
| kfree(reg_req); |
| error3: |
| ib_dereg_mr(mad_agent_priv->agent.mr); |
| error2: |
| kfree(mad_agent_priv); |
| error1: |
| return ret; |
| } |
| EXPORT_SYMBOL(ib_register_mad_agent); |
| |
| static inline int is_snooping_sends(int mad_snoop_flags) |
| { |
| return (mad_snoop_flags & |
| (/*IB_MAD_SNOOP_POSTED_SENDS | |
| IB_MAD_SNOOP_RMPP_SENDS |*/ |
| IB_MAD_SNOOP_SEND_COMPLETIONS /*| |
| IB_MAD_SNOOP_RMPP_SEND_COMPLETIONS*/)); |
| } |
| |
| static inline int is_snooping_recvs(int mad_snoop_flags) |
| { |
| return (mad_snoop_flags & |
| (IB_MAD_SNOOP_RECVS /*| |
| IB_MAD_SNOOP_RMPP_RECVS*/)); |
| } |
| |
| static int register_snoop_agent(struct ib_mad_qp_info *qp_info, |
| struct ib_mad_snoop_private *mad_snoop_priv) |
| { |
| struct ib_mad_snoop_private **new_snoop_table; |
| unsigned long flags; |
| int i; |
| |
| spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| /* Check for empty slot in array. */ |
| for (i = 0; i < qp_info->snoop_table_size; i++) |
| if (!qp_info->snoop_table[i]) |
| break; |
| |
| if (i == qp_info->snoop_table_size) { |
| /* Grow table. */ |
| new_snoop_table = krealloc(qp_info->snoop_table, |
| sizeof mad_snoop_priv * |
| (qp_info->snoop_table_size + 1), |
| GFP_ATOMIC); |
| if (!new_snoop_table) { |
| i = -ENOMEM; |
| goto out; |
| } |
| |
| qp_info->snoop_table = new_snoop_table; |
| qp_info->snoop_table_size++; |
| } |
| qp_info->snoop_table[i] = mad_snoop_priv; |
| atomic_inc(&qp_info->snoop_count); |
| out: |
| spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| return i; |
| } |
| |
| struct ib_mad_agent *ib_register_mad_snoop(struct ib_device *device, |
| u8 port_num, |
| enum ib_qp_type qp_type, |
| int mad_snoop_flags, |
| ib_mad_snoop_handler snoop_handler, |
| ib_mad_recv_handler recv_handler, |
| void *context) |
| { |
| struct ib_mad_port_private *port_priv; |
| struct ib_mad_agent *ret; |
| struct ib_mad_snoop_private *mad_snoop_priv; |
| int qpn; |
| |
| /* Validate parameters */ |
| if ((is_snooping_sends(mad_snoop_flags) && !snoop_handler) || |
| (is_snooping_recvs(mad_snoop_flags) && !recv_handler)) { |
| ret = ERR_PTR(-EINVAL); |
| goto error1; |
| } |
| qpn = get_spl_qp_index(qp_type); |
| if (qpn == -1) { |
| ret = ERR_PTR(-EINVAL); |
| goto error1; |
| } |
| port_priv = ib_get_mad_port(device, port_num); |
| if (!port_priv) { |
| ret = ERR_PTR(-ENODEV); |
| goto error1; |
| } |
| /* Allocate structures */ |
| mad_snoop_priv = kzalloc(sizeof *mad_snoop_priv, GFP_KERNEL); |
| if (!mad_snoop_priv) { |
| ret = ERR_PTR(-ENOMEM); |
| goto error1; |
| } |
| |
| /* Now, fill in the various structures */ |
| mad_snoop_priv->qp_info = &port_priv->qp_info[qpn]; |
| mad_snoop_priv->agent.device = device; |
| mad_snoop_priv->agent.recv_handler = recv_handler; |
| mad_snoop_priv->agent.snoop_handler = snoop_handler; |
| mad_snoop_priv->agent.context = context; |
| mad_snoop_priv->agent.qp = port_priv->qp_info[qpn].qp; |
| mad_snoop_priv->agent.port_num = port_num; |
| mad_snoop_priv->mad_snoop_flags = mad_snoop_flags; |
| init_completion(&mad_snoop_priv->comp); |
| mad_snoop_priv->snoop_index = register_snoop_agent( |
| &port_priv->qp_info[qpn], |
| mad_snoop_priv); |
| if (mad_snoop_priv->snoop_index < 0) { |
| ret = ERR_PTR(mad_snoop_priv->snoop_index); |
| goto error2; |
| } |
| |
| atomic_set(&mad_snoop_priv->refcount, 1); |
| return &mad_snoop_priv->agent; |
| |
| error2: |
| kfree(mad_snoop_priv); |
| error1: |
| return ret; |
| } |
| EXPORT_SYMBOL(ib_register_mad_snoop); |
| |
| static inline void deref_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
| { |
| if (atomic_dec_and_test(&mad_agent_priv->refcount)) |
| complete(&mad_agent_priv->comp); |
| } |
| |
| static inline void deref_snoop_agent(struct ib_mad_snoop_private *mad_snoop_priv) |
| { |
| if (atomic_dec_and_test(&mad_snoop_priv->refcount)) |
| complete(&mad_snoop_priv->comp); |
| } |
| |
| static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv) |
| { |
| struct ib_mad_port_private *port_priv; |
| unsigned long flags; |
| |
| /* Note that we could still be handling received MADs */ |
| |
| /* |
| * 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_irqsave(&port_priv->reg_lock, flags); |
| remove_mad_reg_req(mad_agent_priv); |
| list_del(&mad_agent_priv->agent_list); |
| spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
| |
| flush_workqueue(port_priv->wq); |
| ib_cancel_rmpp_recvs(mad_agent_priv); |
| |
| deref_mad_agent(mad_agent_priv); |
| wait_for_completion(&mad_agent_priv->comp); |
| |
| kfree(mad_agent_priv->reg_req); |
| ib_dereg_mr(mad_agent_priv->agent.mr); |
| kfree(mad_agent_priv); |
| } |
| |
| static void unregister_mad_snoop(struct ib_mad_snoop_private *mad_snoop_priv) |
| { |
| struct ib_mad_qp_info *qp_info; |
| unsigned long flags; |
| |
| qp_info = mad_snoop_priv->qp_info; |
| spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| qp_info->snoop_table[mad_snoop_priv->snoop_index] = NULL; |
| atomic_dec(&qp_info->snoop_count); |
| spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| |
| deref_snoop_agent(mad_snoop_priv); |
| wait_for_completion(&mad_snoop_priv->comp); |
| |
| kfree(mad_snoop_priv); |
| } |
| |
| /* |
| * ib_unregister_mad_agent - Unregisters a client from using MAD services |
| */ |
| int ib_unregister_mad_agent(struct ib_mad_agent *mad_agent) |
| { |
| struct ib_mad_agent_private *mad_agent_priv; |
| struct ib_mad_snoop_private *mad_snoop_priv; |
| |
| /* If the TID is zero, the agent can only snoop. */ |
| if (mad_agent->hi_tid) { |
| mad_agent_priv = container_of(mad_agent, |
| struct ib_mad_agent_private, |
| agent); |
| unregister_mad_agent(mad_agent_priv); |
| } else { |
| mad_snoop_priv = container_of(mad_agent, |
| struct ib_mad_snoop_private, |
| agent); |
| unregister_mad_snoop(mad_snoop_priv); |
| } |
| return 0; |
| } |
| 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; |
| |
| BUG_ON(!mad_list->mad_queue); |
| 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 snoop_send(struct ib_mad_qp_info *qp_info, |
| struct ib_mad_send_buf *send_buf, |
| struct ib_mad_send_wc *mad_send_wc, |
| int mad_snoop_flags) |
| { |
| struct ib_mad_snoop_private *mad_snoop_priv; |
| unsigned long flags; |
| int i; |
| |
| spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| for (i = 0; i < qp_info->snoop_table_size; i++) { |
| mad_snoop_priv = qp_info->snoop_table[i]; |
| if (!mad_snoop_priv || |
| !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) |
| continue; |
| |
| atomic_inc(&mad_snoop_priv->refcount); |
| spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| mad_snoop_priv->agent.snoop_handler(&mad_snoop_priv->agent, |
| send_buf, mad_send_wc); |
| deref_snoop_agent(mad_snoop_priv); |
| spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| } |
| spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| } |
| |
| static void snoop_recv(struct ib_mad_qp_info *qp_info, |
| struct ib_mad_recv_wc *mad_recv_wc, |
| int mad_snoop_flags) |
| { |
| struct ib_mad_snoop_private *mad_snoop_priv; |
| unsigned long flags; |
| int i; |
| |
| spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| for (i = 0; i < qp_info->snoop_table_size; i++) { |
| mad_snoop_priv = qp_info->snoop_table[i]; |
| if (!mad_snoop_priv || |
| !(mad_snoop_priv->mad_snoop_flags & mad_snoop_flags)) |
| continue; |
| |
| atomic_inc(&mad_snoop_priv->refcount); |
| spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent, |
| mad_recv_wc); |
| deref_snoop_agent(mad_snoop_priv); |
| spin_lock_irqsave(&qp_info->snoop_lock, flags); |
| } |
| spin_unlock_irqrestore(&qp_info->snoop_lock, flags); |
| } |
| |
| static void build_smp_wc(struct ib_qp *qp, |
| u64 wr_id, u16 slid, u16 pkey_index, u8 port_num, |
| struct ib_wc *wc) |
| { |
| memset(wc, 0, sizeof *wc); |
| wc->wr_id = wr_id; |
| 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_send_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->wr.ud.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_SMP_CLASS_VERSION) { |
| u32 opa_drslid; |
| |
| 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 { |
| 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; |
| dev_err(&device->dev, "No memory for ib_mad_local_private\n"); |
| 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; |
| dev_err(&device->dev, "No memory for local response MAD\n"); |
| kfree(local); |
| goto out; |
| } |
| |
| build_smp_wc(mad_agent_priv->agent.qp, |
| send_wr->wr_id, drslid, |
| send_wr->wr.ud.pkey_index, |
| send_wr->wr.ud.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->process_mad(device, 0, port_num, &mad_wc, NULL, |
| (const struct ib_mad_hdr *)smp, mad_size, |
| (struct ib_mad_hdr *)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 |
| */ |
| atomic_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.wr.ud.pkey_index = out_mad_pkey_index; |
| local->return_wc_byte_len = mad_size; |
| } |
| /* Reference MAD agent until send side of local completion handled */ |
| atomic_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) { |
| dev_err(&send_buf->mad_agent->device->dev, |
| "alloc_send_rmpp_segs: RMPP mem alloc failed for len %zd, gfp %#x\n", |
| sizeof (*seg) + seg_size, gfp_mask); |
| 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->mr->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->mr->lkey; |
| |
| mad_send_wr->send_wr.wr_id = (unsigned long) mad_send_wr; |
| mad_send_wr->send_wr.sg_list = mad_send_wr->sg_list; |
| mad_send_wr->send_wr.num_sge = 2; |
| mad_send_wr->send_wr.opcode = IB_WR_SEND; |
| mad_send_wr->send_wr.send_flags = IB_SEND_SIGNALED; |
| mad_send_wr->send_wr.wr.ud.remote_qpn = remote_qpn; |
| mad_send_wr->send_wr.wr.ud.remote_qkey = IB_QP_SET_QKEY; |
| mad_send_wr->send_wr.wr.ud.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; |
| atomic_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_send_wr *bad_send_wr; |
| 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->send_wr.wr_id = (unsigned long)&mad_send_wr->mad_list; |
| mad_send_wr->mad_list.mad_queue = &qp_info->send_queue; |
| |
| 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) { |
| ret = ib_post_send(mad_agent->qp, &mad_send_wr->send_wr, |
| &bad_send_wr); |
| 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; |
| |
| 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.wr.ud.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 */ |
| atomic_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); |
| atomic_dec(&mad_agent_priv->refcount); |
| 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); |
| |
| struct ib_mad_agent *ib_redirect_mad_qp(struct ib_qp *qp, |
| u8 rmpp_version, |
| ib_mad_send_handler send_handler, |
| ib_mad_recv_handler recv_handler, |
| void *context) |
| { |
| return ERR_PTR(-EINVAL); /* XXX: for now */ |
| } |
| EXPORT_SYMBOL(ib_redirect_mad_qp); |
| |
| int ib_process_mad_wc(struct ib_mad_agent *mad_agent, |
| struct ib_wc *wc) |
| { |
| dev_err(&mad_agent->device->dev, |
| "ib_process_mad_wc() not implemented yet\n"); |
| return 0; |
| } |
| EXPORT_SYMBOL(ib_process_mad_wc); |
| |
| 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); |
| if (!*method) { |
| pr_err("No memory for ib_mad_mgmt_method_table\n"); |
| return -ENOMEM; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * 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) { |
| dev_err(&agent_priv->agent.device->dev, |
| "No memory for ib_mad_mgmt_class_table\n"); |
| 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) { |
| dev_err(&agent_priv->agent.device->dev, |
| "No memory for ib_mad_mgmt_vendor_class_table\n"); |
| 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) { |
| dev_err(&agent_priv->agent.device->dev, |
| "No memory for ib_mad_mgmt_vendor_class\n"); |
| 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]; |
| BUG_ON(!*method); |
| 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]; |
| BUG_ON(*method); |
| /* Allocate method table for this OUI */ |
| if ((ret = allocate_method_table(method))) |
| 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; |
| |
| spin_lock_irqsave(&port_priv->reg_lock, flags); |
| if (ib_response_mad(mad_hdr)) { |
| u32 hi_tid; |
| struct ib_mad_agent_private *entry; |
| |
| /* |
| * Routing is based on high 32 bits of transaction ID |
| * of MAD. |
| */ |
| hi_tid = be64_to_cpu(mad_hdr->tid) >> 32; |
| list_for_each_entry(entry, &port_priv->agent_list, agent_list) { |
| if (entry->agent.hi_tid == hi_tid) { |
| mad_agent = entry; |
| break; |
| } |
| } |
| } 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; |
| |
| /* |
| * 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) >= |
| IB_MGMT_MAX_METHODS) |
| 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) { |
| if (mad_agent->agent.recv_handler) |
| atomic_inc(&mad_agent->refcount); |
| else { |
| dev_notice(&port_priv->device->dev, |
| "No receive handler for client %p on port %d\n", |
| &mad_agent->agent, port_priv->port_num); |
| mad_agent = NULL; |
| } |
| } |
| out: |
| spin_unlock_irqrestore(&port_priv->reg_lock, flags); |
| |
| 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 { |
| /* 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 ib_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; |
| |
| 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 (ib_query_ah(wr->send_buf.ah, &attr)) |
| /* Assume not equal, to avoid false positives. */ |
| return 0; |
| |
| if (!!(attr.ah_flags & IB_AH_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 (!(attr.ah_flags & IB_AH_GRH)) { |
| if (ib_get_cached_lmc(device, port_num, &lmc)) |
| return 0; |
| return (!lmc || !((attr.src_path_bits ^ |
| rwc->wc->dlid_path_bits) & |
| ((1 << lmc) - 1))); |
| } else { |
| if (ib_get_cached_gid(device, port_num, |
| attr.grh.sgid_index, &sgid)) |
| return 0; |
| return !memcmp(sgid.raw, rwc->recv_buf.grh->dgid.raw, |
| 16); |
| } |
| } |
| |
| if (!(attr.ah_flags & IB_AH_GRH)) |
| return attr.dlid == rwc->wc->slid; |
| else |
| return !memcmp(attr.grh.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; |
| |
| INIT_LIST_HEAD(&mad_recv_wc->rmpp_list); |
| 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_recv_wc->wc->wr_id = 0; |
| mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
| mad_recv_wc); |
| atomic_dec(&mad_agent_priv->refcount); |
| } 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_recv_wc->wc->wr_id = (unsigned long) &mad_send_wr->send_buf; |
| mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, |
| mad_recv_wc); |
| atomic_dec(&mad_agent_priv->refcount); |
| |
| 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, |
| mad_recv_wc); |
| deref_mad_agent(mad_agent_priv); |
| } |
| } |
| |
| 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; |
| |
| 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; |
| |
| 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_SMI_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_handler(struct ib_mad_port_private *port_priv, |
| struct ib_wc *wc) |
| { |
| 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_list_head *mad_list; |
| 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; |
| |
| mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; |
| 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; |
| |
| if (atomic_read(&qp_info->snoop_count)) |
| snoop_recv(qp_info, &recv->header.recv_wc, IB_MAD_SNOOP_RECVS); |
| |
| /* Validate MAD */ |
| if (!validate_mad((const struct ib_mad_hdr *)recv->mad, qp_info, opa)) |
| goto out; |
| |
| mad_size = recv->mad_size; |
| response = alloc_mad_private(mad_size, GFP_KERNEL); |
| if (!response) { |
| dev_err(&port_priv->device->dev, |
| "ib_mad_recv_done_handler no memory for response buffer\n"); |
| 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->process_mad) { |
| ret = port_priv->device->process_mad(port_priv->device, 0, |
| port_priv->port_num, |
| wc, &recv->grh, |
| (const struct ib_mad_hdr *)recv->mad, |
| recv->mad_size, |
| (struct ib_mad_hdr *)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) { |
| 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, |
| int 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_handler(struct ib_mad_port_private *port_priv, |
| struct ib_wc *wc) |
| { |
| struct ib_mad_send_wr_private *mad_send_wr, *queued_send_wr; |
| struct ib_mad_list_head *mad_list; |
| struct ib_mad_qp_info *qp_info; |
| struct ib_mad_queue *send_queue; |
| struct ib_send_wr *bad_send_wr; |
| struct ib_mad_send_wc mad_send_wc; |
| unsigned long flags; |
| int ret; |
| |
| mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; |
| 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; |
| |
| 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; |
| if (atomic_read(&qp_info->snoop_count)) |
| snoop_send(qp_info, &mad_send_wr->send_buf, &mad_send_wc, |
| IB_MAD_SNOOP_SEND_COMPLETIONS); |
| ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc); |
| |
| if (queued_send_wr) { |
| ret = ib_post_send(qp_info->qp, &queued_send_wr->send_wr, |
| &bad_send_wr); |
| 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 void mad_error_handler(struct ib_mad_port_private *port_priv, |
| struct ib_wc *wc) |
| { |
| struct ib_mad_list_head *mad_list; |
| struct ib_mad_qp_info *qp_info; |
| struct ib_mad_send_wr_private *mad_send_wr; |
| int ret; |
| |
| /* Determine if failure was a send or receive */ |
| mad_list = (struct ib_mad_list_head *)(unsigned long)wc->wr_id; |
| qp_info = mad_list->mad_queue->qp_info; |
| if (mad_list->mad_queue == &qp_info->recv_queue) |
| /* |
| * Receive errors indicate that the QP has entered the error |
| * state - error handling/shutdown code will cleanup |
| */ |
| return; |
| |
| /* |
| * 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 */ |
| struct ib_send_wr *bad_send_wr; |
| |
| mad_send_wr->retry = 0; |
| ret = ib_post_send(qp_info->qp, &mad_send_wr->send_wr, |
| &bad_send_wr); |
| if (ret) |
| ib_mad_send_done_handler(port_priv, wc); |
| } else |
| ib_mad_send_done_handler(port_priv, wc); |
| } 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, |
| "mad_error_handler - ib_modify_qp to RTS : %d\n", |
| ret); |
| else |
| mark_sends_for_retry(qp_info); |
| } |
| ib_mad_send_done_handler(port_priv, wc); |
| } |
| } |
| |
| /* |
| * IB MAD completion callback |
| */ |
| static void ib_mad_completion_handler(struct work_struct *work) |
| { |
| struct ib_mad_port_private *port_priv; |
| struct ib_wc wc; |
| |
| port_priv = container_of(work, struct ib_mad_port_private, work); |
| ib_req_notify_cq(port_priv->cq, IB_CQ_NEXT_COMP); |
| |
| while (ib_poll_cq(port_priv->cq, 1, &wc) == 1) { |
| if (wc.status == IB_WC_SUCCESS) { |
| switch (wc.opcode) { |
| case IB_WC_SEND: |
| ib_mad_send_done_handler(port_priv, &wc); |
| break; |
| case IB_WC_RECV: |
| ib_mad_recv_done_handler(port_priv, &wc); |
| break; |
| default: |
| BUG_ON(1); |
| break; |
| } |
| } else |
| mad_error_handler(port_priv, &wc); |
| } |
| } |
| |
| 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); |
| atomic_dec(&mad_agent_priv->refcount); |
| } |
| } |
| |
| 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, |
| (unsigned long) local->mad_send_wr, |
| be16_to_cpu(IB_LID_PERMISSIVE), |
| local->mad_send_wr->send_wr.wr.ud.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; |
| if (atomic_read(&recv_mad_agent->qp_info->snoop_count)) |
| snoop_recv(recv_mad_agent->qp_info, |
| &local->mad_priv->header.recv_wc, |
| IB_MAD_SNOOP_RECVS); |
| recv_mad_agent->agent.recv_handler( |
| &recv_mad_agent->agent, |
| &local->mad_priv->header.recv_wc); |
| spin_lock_irqsave(&recv_mad_agent->lock, flags); |
| atomic_dec(&recv_mad_agent->refcount); |
| 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; |
| if (atomic_read(&mad_agent_priv->qp_info->snoop_count)) |
| snoop_send(mad_agent_priv->qp_info, |
| &local->mad_send_wr->send_buf, |
| &mad_send_wc, IB_MAD_SNOOP_SEND_COMPLETIONS); |
| mad_agent_priv->agent.send_handler(&mad_agent_priv->agent, |
| &mad_send_wc); |
| |
| spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| atomic_dec(&mad_agent_priv->refcount); |
| 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); |
| |
| atomic_dec(&mad_agent_priv->refcount); |
| spin_lock_irqsave(&mad_agent_priv->lock, flags); |
| } |
| spin_unlock_irqrestore(&mad_agent_priv->lock, flags); |
| } |
| |
| static void ib_mad_thread_completion_handler(struct ib_cq *cq, void *arg) |
| { |
| struct ib_mad_port_private *port_priv = cq->cq_context; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&ib_mad_port_list_lock, flags); |
| if (!list_empty(&port_priv->port_list)) |
| queue_work(port_priv->wq, &port_priv->work); |
| spin_unlock_irqrestore(&ib_mad_port_list_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, *bad_recv_wr; |
| struct ib_mad_queue *recv_queue = &qp_info->recv_queue; |
| |
| /* Initialize common scatter list fields */ |
| sg_list.lkey = (*qp_info->port_priv->mr).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) { |
| dev_err(&qp_info->port_priv->device->dev, |
| "No memory for receive buffer\n"); |
| 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))) { |
| ret = -ENOMEM; |
| break; |
| } |
| mad_priv->header.mapping = sg_list.addr; |
| recv_wr.wr_id = (unsigned long)&mad_priv->header.mad_list; |
| mad_priv->header.mad_list.mad_queue = recv_queue; |
| |
| /* 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, &bad_recv_wr); |
| 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) { |
| dev_err(&port_priv->device->dev, |
| "Couldn't kmalloc ib_qp_attr\n"); |
| 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); |
| spin_lock_init(&qp_info->snoop_lock); |
| qp_info->snoop_table = NULL; |
| qp_info->snoop_table_size = 0; |
| atomic_set(&qp_info->snoop_count, 0); |
| } |
| |
| 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); |
| kfree(qp_info->snoop_table); |
| } |
| |
| /* |
| * 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; |
| struct ib_cq_init_attr cq_attr = {}; |
| |
| 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) { |
| dev_err(&device->dev, "No memory for ib_mad_port_private\n"); |
| return -ENOMEM; |
| } |
| |
| port_priv->device = device; |
| port_priv->port_num = port_num; |
| spin_lock_init(&port_priv->reg_lock); |
| INIT_LIST_HEAD(&port_priv->agent_list); |
| 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; |
| |
| cq_attr.cqe = cq_size; |
| port_priv->cq = ib_create_cq(port_priv->device, |
| ib_mad_thread_completion_handler, |
| NULL, port_priv, &cq_attr); |
| if (IS_ERR(port_priv->cq)) { |
| dev_err(&device->dev, "Couldn't create ib_mad CQ\n"); |
| ret = PTR_ERR(port_priv->cq); |
| goto error3; |
| } |
| |
| port_priv->pd = ib_alloc_pd(device); |
| if (IS_ERR(port_priv->pd)) { |
| dev_err(&device->dev, "Couldn't create ib_mad PD\n"); |
| ret = PTR_ERR(port_priv->pd); |
| goto error4; |
| } |
| |
| port_priv->mr = ib_get_dma_mr(port_priv->pd, IB_ACCESS_LOCAL_WRITE); |
| if (IS_ERR(port_priv->mr)) { |
| dev_err(&device->dev, "Couldn't get ib_mad DMA MR\n"); |
| ret = PTR_ERR(port_priv->mr); |
| goto error5; |
| } |
| |
| 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 = create_singlethread_workqueue(name); |
| if (!port_priv->wq) { |
| ret = -ENOMEM; |
| goto error8; |
| } |
| INIT_WORK(&port_priv->work, ib_mad_completion_handler); |
| |
| 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_dereg_mr(port_priv->mr); |
| error5: |
| ib_dealloc_pd(port_priv->pd); |
| error4: |
| ib_destroy_cq(port_priv->cq); |
| cleanup_recv_queue(&port_priv->qp_info[1]); |
| cleanup_recv_queue(&port_priv->qp_info[0]); |
| 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_dereg_mr(port_priv->mr); |
| ib_dealloc_pd(port_priv->pd); |
| ib_destroy_cq(port_priv->cq); |
| 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 void ib_mad_init_device(struct ib_device *device) |
| { |
| int start, i; |
| |
| start = rdma_start_port(device); |
| |
| for (i = start; i <= rdma_end_port(device); i++) { |
| if (!rdma_cap_ib_mad(device, i)) |
| continue; |
| |
| if (ib_mad_port_open(device, i)) { |
| dev_err(&device->dev, "Couldn't open port %d\n", i); |
| goto error; |
| } |
| if (ib_agent_port_open(device, i)) { |
| dev_err(&device->dev, |
| "Couldn't open port %d for agents\n", i); |
| goto error_agent; |
| } |
| } |
| return; |
| |
| 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); |
| } |
| } |
| |
| static void ib_mad_remove_device(struct ib_device *device) |
| { |
| int i; |
| |
| for (i = rdma_start_port(device); i <= rdma_end_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 |
| }; |
| |
| static int __init ib_mad_init_module(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; |
| } |
| |
| static void __exit ib_mad_cleanup_module(void) |
| { |
| ib_unregister_client(&mad_client); |
| } |
| |
| module_init(ib_mad_init_module); |
| module_exit(ib_mad_cleanup_module); |