/* * Copyright(c) 2017 Intel Corporation. * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * BSD LICENSE * * 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. * - Neither the name of Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ /* * This file contains OPA Virtual Network Interface Controller (VNIC) * Ethernet Management Agent (EMA) driver */ #include #include #include #include #include #include #include "opa_vnic_internal.h" char opa_vnic_driver_name[] = "opa_vnic"; /* * The trap service level is kept in bits 3 to 7 in the trap_sl_rsvd * field in the class port info MAD. */ #define GET_TRAP_SL_FROM_CLASS_PORT_INFO(x) (((x) >> 3) & 0x1f) /* Cap trap bursts to a reasonable limit good for normal cases */ #define OPA_VNIC_TRAP_BURST_LIMIT 4 /* * VNIC trap limit timeout. * Inverse of cap2_mask response time out (1.0737 secs) = 0.9 * secs approx IB spec 13.4.6.2.1 PortInfoSubnetTimeout and * 13.4.9 Traps. */ #define OPA_VNIC_TRAP_TIMEOUT ((4096 * (1UL << 18)) / 1000) #define OPA_VNIC_UNSUP_ATTR \ cpu_to_be16(IB_MGMT_MAD_STATUS_UNSUPPORTED_METHOD_ATTRIB) #define OPA_VNIC_INVAL_ATTR \ cpu_to_be16(IB_MGMT_MAD_STATUS_INVALID_ATTRIB_VALUE) #define OPA_VNIC_CLASS_CAP_TRAP 0x1 /* Maximum number of VNIC ports supported */ #define OPA_VNIC_MAX_NUM_VPORT 255 /** * struct opa_vnic_vema_port -- VNIC VEMA port details * @cport: pointer to port * @mad_agent: pointer to mad agent for port * @class_port_info: Class port info information. * @tid: Transaction id * @port_num: OPA port number * @vports: vnic ports * @event_handler: ib event handler * @lock: adapter interface lock */ struct opa_vnic_vema_port { struct opa_vnic_ctrl_port *cport; struct ib_mad_agent *mad_agent; struct opa_class_port_info class_port_info; u64 tid; u8 port_num; struct xarray vports; struct ib_event_handler event_handler; /* Lock to query/update network adapter */ struct mutex lock; }; static void opa_vnic_vema_add_one(struct ib_device *device); static void opa_vnic_vema_rem_one(struct ib_device *device, void *client_data); static struct ib_client opa_vnic_client = { .name = opa_vnic_driver_name, .add = opa_vnic_vema_add_one, .remove = opa_vnic_vema_rem_one, }; /** * vema_get_vport_num -- Get the vnic from the mad * @recvd_mad: Received mad * * Return: returns value of the vnic port number */ static inline u8 vema_get_vport_num(struct opa_vnic_vema_mad *recvd_mad) { return be32_to_cpu(recvd_mad->mad_hdr.attr_mod) & 0xff; } /** * vema_get_vport_adapter -- Get vnic port adapter from recvd mad * @recvd_mad: received mad * @port: ptr to port struct on which MAD was recvd * * Return: vnic adapter */ static inline struct opa_vnic_adapter * vema_get_vport_adapter(struct opa_vnic_vema_mad *recvd_mad, struct opa_vnic_vema_port *port) { u8 vport_num = vema_get_vport_num(recvd_mad); return xa_load(&port->vports, vport_num); } /** * vema_mac_tbl_req_ok -- Check if mac request has correct values * @mac_tbl: mac table * * This function checks for the validity of the offset and number of * entries required. * * Return: true if offset and num_entries are valid */ static inline bool vema_mac_tbl_req_ok(struct opa_veswport_mactable *mac_tbl) { u16 offset, num_entries; u16 req_entries = ((OPA_VNIC_EMA_DATA - sizeof(*mac_tbl)) / sizeof(mac_tbl->tbl_entries[0])); offset = be16_to_cpu(mac_tbl->offset); num_entries = be16_to_cpu(mac_tbl->num_entries); return ((num_entries <= req_entries) && (offset + num_entries <= OPA_VNIC_MAC_TBL_MAX_ENTRIES)); } /* * Return the power on default values in the port info structure * in big endian format as required by MAD. */ static inline void vema_get_pod_values(struct opa_veswport_info *port_info) { memset(port_info, 0, sizeof(*port_info)); port_info->vport.max_mac_tbl_ent = cpu_to_be16(OPA_VNIC_MAC_TBL_MAX_ENTRIES); port_info->vport.max_smac_ent = cpu_to_be16(OPA_VNIC_MAX_SMAC_LIMIT); port_info->vport.oper_state = OPA_VNIC_STATE_DROP_ALL; port_info->vport.config_state = OPA_VNIC_STATE_DROP_ALL; port_info->vesw.eth_mtu = cpu_to_be16(ETH_DATA_LEN); } /** * vema_add_vport -- Add a new vnic port * @port: ptr to opa_vnic_vema_port struct * @vport_num: vnic port number (to be added) * * Return a pointer to the vnic adapter structure */ static struct opa_vnic_adapter *vema_add_vport(struct opa_vnic_vema_port *port, u8 vport_num) { struct opa_vnic_ctrl_port *cport = port->cport; struct opa_vnic_adapter *adapter; adapter = opa_vnic_add_netdev(cport->ibdev, port->port_num, vport_num); if (!IS_ERR(adapter)) { int rc; adapter->cport = cport; rc = xa_insert(&port->vports, vport_num, adapter, GFP_KERNEL); if (rc < 0) { opa_vnic_rem_netdev(adapter); adapter = ERR_PTR(rc); } } return adapter; } /** * vema_get_class_port_info -- Get class info for port * @port: Port on whic MAD was received * @recvd_mad: pointer to the received mad * @rsp_mad: pointer to respose mad * * This function copies the latest class port info value set for the * port and stores it for generating traps */ static void vema_get_class_port_info(struct opa_vnic_vema_port *port, struct opa_vnic_vema_mad *recvd_mad, struct opa_vnic_vema_mad *rsp_mad) { struct opa_class_port_info *port_info; port_info = (struct opa_class_port_info *)rsp_mad->data; memcpy(port_info, &port->class_port_info, sizeof(*port_info)); port_info->base_version = OPA_MGMT_BASE_VERSION, port_info->class_version = OPA_EMA_CLASS_VERSION; /* * Set capability mask bit indicating agent generates traps, * and set the maximum number of VNIC ports supported. */ port_info->cap_mask = cpu_to_be16((OPA_VNIC_CLASS_CAP_TRAP | (OPA_VNIC_MAX_NUM_VPORT << 8))); /* * Since a get routine is always sent by the EM first we * set the expected response time to * 4.096 usec * 2^18 == 1.0737 sec here. */ port_info->cap_mask2_resp_time = cpu_to_be32(18); } /** * vema_set_class_port_info -- Get class info for port * @port: Port on whic MAD was received * @recvd_mad: pointer to the received mad * @rsp_mad: pointer to respose mad * * This function updates the port class info for the specific vnic * and sets up the response mad data */ static void vema_set_class_port_info(struct opa_vnic_vema_port *port, struct opa_vnic_vema_mad *recvd_mad, struct opa_vnic_vema_mad *rsp_mad) { memcpy(&port->class_port_info, recvd_mad->data, sizeof(port->class_port_info)); vema_get_class_port_info(port, recvd_mad, rsp_mad); } /** * vema_get_veswport_info -- Get veswport info * @port: source port on which MAD was received * @recvd_mad: pointer to the received mad * @rsp_mad: pointer to respose mad */ static void vema_get_veswport_info(struct opa_vnic_vema_port *port, struct opa_vnic_vema_mad *recvd_mad, struct opa_vnic_vema_mad *rsp_mad) { struct opa_veswport_info *port_info = (struct opa_veswport_info *)rsp_mad->data; struct opa_vnic_adapter *adapter; adapter = vema_get_vport_adapter(recvd_mad, port); if (adapter) { memset(port_info, 0, sizeof(*port_info)); opa_vnic_get_vesw_info(adapter, &port_info->vesw); opa_vnic_get_per_veswport_info(adapter, &port_info->vport); } else { vema_get_pod_values(port_info); } } /** * vema_set_veswport_info -- Set veswport info * @port: source port on which MAD was received * @recvd_mad: pointer to the received mad * @rsp_mad: pointer to respose mad * * This function gets the port class infor for vnic */ static void vema_set_veswport_info(struct opa_vnic_vema_port *port, struct opa_vnic_vema_mad *recvd_mad, struct opa_vnic_vema_mad *rsp_mad) { struct opa_vnic_ctrl_port *cport = port->cport; struct opa_veswport_info *port_info; struct opa_vnic_adapter *adapter; u8 vport_num; vport_num = vema_get_vport_num(recvd_mad); adapter = vema_get_vport_adapter(recvd_mad, port); if (!adapter) { adapter = vema_add_vport(port, vport_num); if (IS_ERR(adapter)) { c_err("failed to add vport %d: %ld\n", vport_num, PTR_ERR(adapter)); goto err_exit; } } port_info = (struct opa_veswport_info *)recvd_mad->data; opa_vnic_set_vesw_info(adapter, &port_info->vesw); opa_vnic_set_per_veswport_info(adapter, &port_info->vport); /* Process the new config settings */ opa_vnic_process_vema_config(adapter); vema_get_veswport_info(port, recvd_mad, rsp_mad); return; err_exit: rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR; } /** * vema_get_mac_entries -- Get MAC entries in VNIC MAC table * @port: source port on which MAD was received * @recvd_mad: pointer to the received mad * @rsp_mad: pointer to respose mad * * This function gets the MAC entries that are programmed into * the VNIC MAC forwarding table. It checks for the validity of * the index into the MAC table and the number of entries that * are to be retrieved. */ static void vema_get_mac_entries(struct opa_vnic_vema_port *port, struct opa_vnic_vema_mad *recvd_mad, struct opa_vnic_vema_mad *rsp_mad) { struct opa_veswport_mactable *mac_tbl_in, *mac_tbl_out; struct opa_vnic_adapter *adapter; adapter = vema_get_vport_adapter(recvd_mad, port); if (!adapter) { rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR; return; } mac_tbl_in = (struct opa_veswport_mactable *)recvd_mad->data; mac_tbl_out = (struct opa_veswport_mactable *)rsp_mad->data; if (vema_mac_tbl_req_ok(mac_tbl_in)) { mac_tbl_out->offset = mac_tbl_in->offset; mac_tbl_out->num_entries = mac_tbl_in->num_entries; opa_vnic_query_mac_tbl(adapter, mac_tbl_out); } else { rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR; } } /** * vema_set_mac_entries -- Set MAC entries in VNIC MAC table * @port: source port on which MAD was received * @recvd_mad: pointer to the received mad * @rsp_mad: pointer to respose mad * * This function sets the MAC entries in the VNIC forwarding table * It checks for the validity of the index and the number of forwarding * table entries to be programmed. */ static void vema_set_mac_entries(struct opa_vnic_vema_port *port, struct opa_vnic_vema_mad *recvd_mad, struct opa_vnic_vema_mad *rsp_mad) { struct opa_veswport_mactable *mac_tbl; struct opa_vnic_adapter *adapter; adapter = vema_get_vport_adapter(recvd_mad, port); if (!adapter) { rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR; return; } mac_tbl = (struct opa_veswport_mactable *)recvd_mad->data; if (vema_mac_tbl_req_ok(mac_tbl)) { if (opa_vnic_update_mac_tbl(adapter, mac_tbl)) rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR; } else { rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR; } vema_get_mac_entries(port, recvd_mad, rsp_mad); } /** * vema_set_delete_vesw -- Reset VESW info to POD values * @port: source port on which MAD was received * @recvd_mad: pointer to the received mad * @rsp_mad: pointer to respose mad * * This function clears all the fields of veswport info for the requested vesw * and sets them back to the power-on default values. It does not delete the * vesw. */ static void vema_set_delete_vesw(struct opa_vnic_vema_port *port, struct opa_vnic_vema_mad *recvd_mad, struct opa_vnic_vema_mad *rsp_mad) { struct opa_veswport_info *port_info = (struct opa_veswport_info *)rsp_mad->data; struct opa_vnic_adapter *adapter; adapter = vema_get_vport_adapter(recvd_mad, port); if (!adapter) { rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR; return; } vema_get_pod_values(port_info); opa_vnic_set_vesw_info(adapter, &port_info->vesw); opa_vnic_set_per_veswport_info(adapter, &port_info->vport); /* Process the new config settings */ opa_vnic_process_vema_config(adapter); opa_vnic_release_mac_tbl(adapter); vema_get_veswport_info(port, recvd_mad, rsp_mad); } /** * vema_get_mac_list -- Get the unicast/multicast macs. * @port: source port on which MAD was received * @recvd_mad: Received mad contains fields to set vnic parameters * @rsp_mad: Response mad to be built * @attr_id: Attribute ID indicating multicast or unicast mac list */ static void vema_get_mac_list(struct opa_vnic_vema_port *port, struct opa_vnic_vema_mad *recvd_mad, struct opa_vnic_vema_mad *rsp_mad, u16 attr_id) { struct opa_veswport_iface_macs *macs_in, *macs_out; int max_entries = (OPA_VNIC_EMA_DATA - sizeof(*macs_out)) / ETH_ALEN; struct opa_vnic_adapter *adapter; adapter = vema_get_vport_adapter(recvd_mad, port); if (!adapter) { rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR; return; } macs_in = (struct opa_veswport_iface_macs *)recvd_mad->data; macs_out = (struct opa_veswport_iface_macs *)rsp_mad->data; macs_out->start_idx = macs_in->start_idx; if (macs_in->num_macs_in_msg) macs_out->num_macs_in_msg = macs_in->num_macs_in_msg; else macs_out->num_macs_in_msg = cpu_to_be16(max_entries); if (attr_id == OPA_EM_ATTR_IFACE_MCAST_MACS) opa_vnic_query_mcast_macs(adapter, macs_out); else opa_vnic_query_ucast_macs(adapter, macs_out); } /** * vema_get_summary_counters -- Gets summary counters. * @port: source port on which MAD was received * @recvd_mad: Received mad contains fields to set vnic parameters * @rsp_mad: Response mad to be built */ static void vema_get_summary_counters(struct opa_vnic_vema_port *port, struct opa_vnic_vema_mad *recvd_mad, struct opa_vnic_vema_mad *rsp_mad) { struct opa_veswport_summary_counters *cntrs; struct opa_vnic_adapter *adapter; adapter = vema_get_vport_adapter(recvd_mad, port); if (adapter) { cntrs = (struct opa_veswport_summary_counters *)rsp_mad->data; opa_vnic_get_summary_counters(adapter, cntrs); } else { rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR; } } /** * vema_get_error_counters -- Gets summary counters. * @port: source port on which MAD was received * @recvd_mad: Received mad contains fields to set vnic parameters * @rsp_mad: Response mad to be built */ static void vema_get_error_counters(struct opa_vnic_vema_port *port, struct opa_vnic_vema_mad *recvd_mad, struct opa_vnic_vema_mad *rsp_mad) { struct opa_veswport_error_counters *cntrs; struct opa_vnic_adapter *adapter; adapter = vema_get_vport_adapter(recvd_mad, port); if (adapter) { cntrs = (struct opa_veswport_error_counters *)rsp_mad->data; opa_vnic_get_error_counters(adapter, cntrs); } else { rsp_mad->mad_hdr.status = OPA_VNIC_INVAL_ATTR; } } /** * vema_get -- Process received get MAD * @port: source port on which MAD was received * @recvd_mad: Received mad * @rsp_mad: Response mad to be built */ static void vema_get(struct opa_vnic_vema_port *port, struct opa_vnic_vema_mad *recvd_mad, struct opa_vnic_vema_mad *rsp_mad) { u16 attr_id = be16_to_cpu(recvd_mad->mad_hdr.attr_id); switch (attr_id) { case OPA_EM_ATTR_CLASS_PORT_INFO: vema_get_class_port_info(port, recvd_mad, rsp_mad); break; case OPA_EM_ATTR_VESWPORT_INFO: vema_get_veswport_info(port, recvd_mad, rsp_mad); break; case OPA_EM_ATTR_VESWPORT_MAC_ENTRIES: vema_get_mac_entries(port, recvd_mad, rsp_mad); break; case OPA_EM_ATTR_IFACE_UCAST_MACS: /* fall through */ case OPA_EM_ATTR_IFACE_MCAST_MACS: vema_get_mac_list(port, recvd_mad, rsp_mad, attr_id); break; case OPA_EM_ATTR_VESWPORT_SUMMARY_COUNTERS: vema_get_summary_counters(port, recvd_mad, rsp_mad); break; case OPA_EM_ATTR_VESWPORT_ERROR_COUNTERS: vema_get_error_counters(port, recvd_mad, rsp_mad); break; default: rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR; break; } } /** * vema_set -- Process received set MAD * @port: source port on which MAD was received * @recvd_mad: Received mad contains fields to set vnic parameters * @rsp_mad: Response mad to be built */ static void vema_set(struct opa_vnic_vema_port *port, struct opa_vnic_vema_mad *recvd_mad, struct opa_vnic_vema_mad *rsp_mad) { u16 attr_id = be16_to_cpu(recvd_mad->mad_hdr.attr_id); switch (attr_id) { case OPA_EM_ATTR_CLASS_PORT_INFO: vema_set_class_port_info(port, recvd_mad, rsp_mad); break; case OPA_EM_ATTR_VESWPORT_INFO: vema_set_veswport_info(port, recvd_mad, rsp_mad); break; case OPA_EM_ATTR_VESWPORT_MAC_ENTRIES: vema_set_mac_entries(port, recvd_mad, rsp_mad); break; case OPA_EM_ATTR_DELETE_VESW: vema_set_delete_vesw(port, recvd_mad, rsp_mad); break; default: rsp_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR; break; } } /** * vema_send -- Send handler for VEMA MAD agent * @mad_agent: pointer to the mad agent * @mad_wc: pointer to mad send work completion information * * Free all the data structures associated with the sent MAD */ static void vema_send(struct ib_mad_agent *mad_agent, struct ib_mad_send_wc *mad_wc) { rdma_destroy_ah(mad_wc->send_buf->ah, RDMA_DESTROY_AH_SLEEPABLE); ib_free_send_mad(mad_wc->send_buf); } /** * vema_recv -- Recv handler for VEMA MAD agent * @mad_agent: pointer to the mad agent * @send_buf: Send buffer if found, else NULL * @mad_wc: pointer to mad send work completion information * * Handle only set and get methods and respond to other methods * as unsupported. Allocate response buffer and address handle * for the response MAD. */ static void vema_recv(struct ib_mad_agent *mad_agent, struct ib_mad_send_buf *send_buf, struct ib_mad_recv_wc *mad_wc) { struct opa_vnic_vema_port *port; struct ib_ah *ah; struct ib_mad_send_buf *rsp; struct opa_vnic_vema_mad *vema_mad; if (!mad_wc || !mad_wc->recv_buf.mad) return; port = mad_agent->context; ah = ib_create_ah_from_wc(mad_agent->qp->pd, mad_wc->wc, mad_wc->recv_buf.grh, mad_agent->port_num); if (IS_ERR(ah)) goto free_recv_mad; rsp = ib_create_send_mad(mad_agent, mad_wc->wc->src_qp, mad_wc->wc->pkey_index, 0, IB_MGMT_VENDOR_HDR, OPA_VNIC_EMA_DATA, GFP_KERNEL, OPA_MGMT_BASE_VERSION); if (IS_ERR(rsp)) goto err_rsp; rsp->ah = ah; vema_mad = rsp->mad; memcpy(vema_mad, mad_wc->recv_buf.mad, IB_MGMT_VENDOR_HDR); vema_mad->mad_hdr.method = IB_MGMT_METHOD_GET_RESP; vema_mad->mad_hdr.status = 0; /* Lock ensures network adapter is not removed */ mutex_lock(&port->lock); switch (mad_wc->recv_buf.mad->mad_hdr.method) { case IB_MGMT_METHOD_GET: vema_get(port, (struct opa_vnic_vema_mad *)mad_wc->recv_buf.mad, vema_mad); break; case IB_MGMT_METHOD_SET: vema_set(port, (struct opa_vnic_vema_mad *)mad_wc->recv_buf.mad, vema_mad); break; default: vema_mad->mad_hdr.status = OPA_VNIC_UNSUP_ATTR; break; } mutex_unlock(&port->lock); if (!ib_post_send_mad(rsp, NULL)) { /* * with post send successful ah and send mad * will be destroyed in send handler */ goto free_recv_mad; } ib_free_send_mad(rsp); err_rsp: rdma_destroy_ah(ah, RDMA_DESTROY_AH_SLEEPABLE); free_recv_mad: ib_free_recv_mad(mad_wc); } /** * vema_get_port -- Gets the opa_vnic_vema_port * @cport: pointer to control dev * @port_num: Port number * * This function loops through the ports and returns * the opa_vnic_vema port structure that is associated * with the OPA port number * * Return: ptr to requested opa_vnic_vema_port strucure * if success, NULL if not */ static struct opa_vnic_vema_port * vema_get_port(struct opa_vnic_ctrl_port *cport, u8 port_num) { struct opa_vnic_vema_port *port = (void *)cport + sizeof(*cport); if (port_num > cport->num_ports) return NULL; return port + (port_num - 1); } /** * opa_vnic_vema_send_trap -- This function sends a trap to the EM * @adapter: pointer to vnic adapter * @data: pointer to trap data filled by calling function * @lid: issuers lid (encap_slid from vesw_port_info) * * This function is called from the VNIC driver to send a trap if there * is somethng the EM should be notified about. These events currently * are * 1) UNICAST INTERFACE MACADDRESS changes * 2) MULTICAST INTERFACE MACADDRESS changes * 3) ETHERNET LINK STATUS changes * While allocating the send mad the remote site qpn used is 1 * as this is the well known QP. * */ void opa_vnic_vema_send_trap(struct opa_vnic_adapter *adapter, struct __opa_veswport_trap *data, u32 lid) { struct opa_vnic_ctrl_port *cport = adapter->cport; struct ib_mad_send_buf *send_buf; struct opa_vnic_vema_port *port; struct ib_device *ibp; struct opa_vnic_vema_mad_trap *trap_mad; struct opa_class_port_info *class; struct rdma_ah_attr ah_attr; struct ib_ah *ah; struct opa_veswport_trap *trap; u32 trap_lid; u16 pkey_idx; if (!cport) goto err_exit; ibp = cport->ibdev; port = vema_get_port(cport, data->opaportnum); if (!port || !port->mad_agent) goto err_exit; if (time_before(jiffies, adapter->trap_timeout)) { if (adapter->trap_count == OPA_VNIC_TRAP_BURST_LIMIT) { v_warn("Trap rate exceeded\n"); goto err_exit; } else { adapter->trap_count++; } } else { adapter->trap_count = 0; } class = &port->class_port_info; /* Set up address handle */ memset(&ah_attr, 0, sizeof(ah_attr)); ah_attr.type = rdma_ah_find_type(ibp, port->port_num); rdma_ah_set_sl(&ah_attr, GET_TRAP_SL_FROM_CLASS_PORT_INFO(class->trap_sl_rsvd)); rdma_ah_set_port_num(&ah_attr, port->port_num); trap_lid = be32_to_cpu(class->trap_lid); /* * check for trap lid validity, must not be zero * The trap sink could change after we fashion the MAD but since traps * are not guaranteed we won't use a lock as anyway the change will take * place even with locking. */ if (!trap_lid) { c_err("%s: Invalid dlid\n", __func__); goto err_exit; } rdma_ah_set_dlid(&ah_attr, trap_lid); ah = rdma_create_ah(port->mad_agent->qp->pd, &ah_attr, 0); if (IS_ERR(ah)) { c_err("%s:Couldn't create new AH = %p\n", __func__, ah); c_err("%s:dlid = %d, sl = %d, port = %d\n", __func__, rdma_ah_get_dlid(&ah_attr), rdma_ah_get_sl(&ah_attr), rdma_ah_get_port_num(&ah_attr)); goto err_exit; } if (ib_find_pkey(ibp, data->opaportnum, IB_DEFAULT_PKEY_FULL, &pkey_idx) < 0) { c_err("%s:full key not found, defaulting to partial\n", __func__); if (ib_find_pkey(ibp, data->opaportnum, IB_DEFAULT_PKEY_PARTIAL, &pkey_idx) < 0) pkey_idx = 1; } send_buf = ib_create_send_mad(port->mad_agent, 1, pkey_idx, 0, IB_MGMT_VENDOR_HDR, IB_MGMT_MAD_DATA, GFP_ATOMIC, OPA_MGMT_BASE_VERSION); if (IS_ERR(send_buf)) { c_err("%s:Couldn't allocate send buf\n", __func__); goto err_sndbuf; } send_buf->ah = ah; /* Set up common MAD hdr */ trap_mad = send_buf->mad; trap_mad->mad_hdr.base_version = OPA_MGMT_BASE_VERSION; trap_mad->mad_hdr.mgmt_class = OPA_MGMT_CLASS_INTEL_EMA; trap_mad->mad_hdr.class_version = OPA_EMA_CLASS_VERSION; trap_mad->mad_hdr.method = IB_MGMT_METHOD_TRAP; port->tid++; trap_mad->mad_hdr.tid = cpu_to_be64(port->tid); trap_mad->mad_hdr.attr_id = IB_SMP_ATTR_NOTICE; /* Set up vendor OUI */ trap_mad->oui[0] = INTEL_OUI_1; trap_mad->oui[1] = INTEL_OUI_2; trap_mad->oui[2] = INTEL_OUI_3; /* Setup notice attribute portion */ trap_mad->notice.gen_type = OPA_INTEL_EMA_NOTICE_TYPE_INFO << 1; trap_mad->notice.oui_1 = INTEL_OUI_1; trap_mad->notice.oui_2 = INTEL_OUI_2; trap_mad->notice.oui_3 = INTEL_OUI_3; trap_mad->notice.issuer_lid = cpu_to_be32(lid); /* copy the actual trap data */ trap = (struct opa_veswport_trap *)trap_mad->notice.raw_data; trap->fabric_id = cpu_to_be16(data->fabric_id); trap->veswid = cpu_to_be16(data->veswid); trap->veswportnum = cpu_to_be32(data->veswportnum); trap->opaportnum = cpu_to_be16(data->opaportnum); trap->veswportindex = data->veswportindex; trap->opcode = data->opcode; /* If successful send set up rate limit timeout else bail */ if (ib_post_send_mad(send_buf, NULL)) { ib_free_send_mad(send_buf); } else { if (adapter->trap_count) return; adapter->trap_timeout = jiffies + usecs_to_jiffies(OPA_VNIC_TRAP_TIMEOUT); return; } err_sndbuf: rdma_destroy_ah(ah, 0); err_exit: v_err("Aborting trap\n"); } static void opa_vnic_event(struct ib_event_handler *handler, struct ib_event *record) { struct opa_vnic_vema_port *port = container_of(handler, struct opa_vnic_vema_port, event_handler); struct opa_vnic_ctrl_port *cport = port->cport; struct opa_vnic_adapter *adapter; unsigned long index; if (record->element.port_num != port->port_num) return; c_dbg("OPA_VNIC received event %d on device %s port %d\n", record->event, dev_name(&record->device->dev), record->element.port_num); if (record->event != IB_EVENT_PORT_ERR && record->event != IB_EVENT_PORT_ACTIVE) return; xa_for_each(&port->vports, index, adapter) { if (record->event == IB_EVENT_PORT_ACTIVE) netif_carrier_on(adapter->netdev); else netif_carrier_off(adapter->netdev); } } /** * vema_unregister -- Unregisters agent * @cport: pointer to control port * * This deletes the registration by VEMA for MADs */ static void vema_unregister(struct opa_vnic_ctrl_port *cport) { struct opa_vnic_adapter *adapter; unsigned long index; int i; for (i = 1; i <= cport->num_ports; i++) { struct opa_vnic_vema_port *port = vema_get_port(cport, i); if (!port->mad_agent) continue; /* Lock ensures no MAD is being processed */ mutex_lock(&port->lock); xa_for_each(&port->vports, index, adapter) opa_vnic_rem_netdev(adapter); mutex_unlock(&port->lock); ib_unregister_mad_agent(port->mad_agent); port->mad_agent = NULL; mutex_destroy(&port->lock); xa_destroy(&port->vports); ib_unregister_event_handler(&port->event_handler); } } /** * vema_register -- Registers agent * @cport: pointer to control port * * This function registers the handlers for the VEMA MADs * * Return: returns 0 on success. non zero otherwise */ static int vema_register(struct opa_vnic_ctrl_port *cport) { struct ib_mad_reg_req reg_req = { .mgmt_class = OPA_MGMT_CLASS_INTEL_EMA, .mgmt_class_version = OPA_MGMT_BASE_VERSION, .oui = { INTEL_OUI_1, INTEL_OUI_2, INTEL_OUI_3 } }; int i; set_bit(IB_MGMT_METHOD_GET, reg_req.method_mask); set_bit(IB_MGMT_METHOD_SET, reg_req.method_mask); /* register ib event handler and mad agent for each port on dev */ for (i = 1; i <= cport->num_ports; i++) { struct opa_vnic_vema_port *port = vema_get_port(cport, i); int ret; port->cport = cport; port->port_num = i; INIT_IB_EVENT_HANDLER(&port->event_handler, cport->ibdev, opa_vnic_event); ib_register_event_handler(&port->event_handler); xa_init(&port->vports); mutex_init(&port->lock); port->mad_agent = ib_register_mad_agent(cport->ibdev, i, IB_QPT_GSI, ®_req, IB_MGMT_RMPP_VERSION, vema_send, vema_recv, port, 0); if (IS_ERR(port->mad_agent)) { ret = PTR_ERR(port->mad_agent); port->mad_agent = NULL; mutex_destroy(&port->lock); vema_unregister(cport); return ret; } } return 0; } /** * opa_vnic_ctrl_config_dev -- This function sends a trap to the EM * by way of ib_modify_port to indicate support for ethernet on the * fabric. * @cport: pointer to control port * @en: enable or disable ethernet on fabric support */ static void opa_vnic_ctrl_config_dev(struct opa_vnic_ctrl_port *cport, bool en) { struct ib_port_modify pm = { 0 }; int i; if (en) pm.set_port_cap_mask = OPA_CAP_MASK3_IsEthOnFabricSupported; else pm.clr_port_cap_mask = OPA_CAP_MASK3_IsEthOnFabricSupported; for (i = 1; i <= cport->num_ports; i++) ib_modify_port(cport->ibdev, i, IB_PORT_OPA_MASK_CHG, &pm); } /** * opa_vnic_vema_add_one -- Handle new ib device * @device: ib device pointer * * Allocate the vnic control port and initialize it. */ static void opa_vnic_vema_add_one(struct ib_device *device) { struct opa_vnic_ctrl_port *cport; int rc, size = sizeof(*cport); if (!rdma_cap_opa_vnic(device)) return; size += device->phys_port_cnt * sizeof(struct opa_vnic_vema_port); cport = kzalloc(size, GFP_KERNEL); if (!cport) return; cport->num_ports = device->phys_port_cnt; cport->ibdev = device; /* Initialize opa vnic management agent (vema) */ rc = vema_register(cport); if (!rc) c_info("VNIC client initialized\n"); ib_set_client_data(device, &opa_vnic_client, cport); opa_vnic_ctrl_config_dev(cport, true); } /** * opa_vnic_vema_rem_one -- Handle ib device removal * @device: ib device pointer * @client_data: ib client data * * Uninitialize and free the vnic control port. */ static void opa_vnic_vema_rem_one(struct ib_device *device, void *client_data) { struct opa_vnic_ctrl_port *cport = client_data; if (!cport) return; c_info("removing VNIC client\n"); opa_vnic_ctrl_config_dev(cport, false); vema_unregister(cport); kfree(cport); } static int __init opa_vnic_init(void) { int rc; rc = ib_register_client(&opa_vnic_client); if (rc) pr_err("VNIC driver register failed %d\n", rc); return rc; } module_init(opa_vnic_init); static void opa_vnic_deinit(void) { ib_unregister_client(&opa_vnic_client); } module_exit(opa_vnic_deinit); MODULE_LICENSE("Dual BSD/GPL"); MODULE_AUTHOR("Intel Corporation"); MODULE_DESCRIPTION("Intel OPA Virtual Network driver");