/* * Copyright (c) 2004 Topspin Communications. All rights reserved. * Copyright (c) 2005 Voltaire, Inc.  All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * * $Id: sa_query.c 2811 2005-07-06 18:11:43Z halr $ */ #include #include #include #include #include #include #include #include #include #include #include #include MODULE_AUTHOR("Roland Dreier"); MODULE_DESCRIPTION("InfiniBand subnet administration query support"); MODULE_LICENSE("Dual BSD/GPL"); struct ib_sa_sm_ah { struct ib_ah *ah; struct kref ref; }; struct ib_sa_port { struct ib_mad_agent *agent; struct ib_sa_sm_ah *sm_ah; struct work_struct update_task; spinlock_t ah_lock; u8 port_num; }; struct ib_sa_device { int start_port, end_port; struct ib_event_handler event_handler; struct ib_sa_port port[0]; }; struct ib_sa_query { void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *); void (*release)(struct ib_sa_query *); struct ib_sa_port *port; struct ib_sa_mad *mad; struct ib_sa_sm_ah *sm_ah; DECLARE_PCI_UNMAP_ADDR(mapping) int id; }; struct ib_sa_service_query { void (*callback)(int, struct ib_sa_service_rec *, void *); void *context; struct ib_sa_query sa_query; }; struct ib_sa_path_query { void (*callback)(int, struct ib_sa_path_rec *, void *); void *context; struct ib_sa_query sa_query; }; struct ib_sa_mcmember_query { void (*callback)(int, struct ib_sa_mcmember_rec *, void *); void *context; struct ib_sa_query sa_query; }; static void ib_sa_add_one(struct ib_device *device); static void ib_sa_remove_one(struct ib_device *device); static struct ib_client sa_client = { .name = "sa", .add = ib_sa_add_one, .remove = ib_sa_remove_one }; static spinlock_t idr_lock; static DEFINE_IDR(query_idr); static spinlock_t tid_lock; static u32 tid; #define PATH_REC_FIELD(field) \ .struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \ .struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \ .field_name = "sa_path_rec:" #field static const struct ib_field path_rec_table[] = { { RESERVED, .offset_words = 0, .offset_bits = 0, .size_bits = 32 }, { RESERVED, .offset_words = 1, .offset_bits = 0, .size_bits = 32 }, { PATH_REC_FIELD(dgid), .offset_words = 2, .offset_bits = 0, .size_bits = 128 }, { PATH_REC_FIELD(sgid), .offset_words = 6, .offset_bits = 0, .size_bits = 128 }, { PATH_REC_FIELD(dlid), .offset_words = 10, .offset_bits = 0, .size_bits = 16 }, { PATH_REC_FIELD(slid), .offset_words = 10, .offset_bits = 16, .size_bits = 16 }, { PATH_REC_FIELD(raw_traffic), .offset_words = 11, .offset_bits = 0, .size_bits = 1 }, { RESERVED, .offset_words = 11, .offset_bits = 1, .size_bits = 3 }, { PATH_REC_FIELD(flow_label), .offset_words = 11, .offset_bits = 4, .size_bits = 20 }, { PATH_REC_FIELD(hop_limit), .offset_words = 11, .offset_bits = 24, .size_bits = 8 }, { PATH_REC_FIELD(traffic_class), .offset_words = 12, .offset_bits = 0, .size_bits = 8 }, { PATH_REC_FIELD(reversible), .offset_words = 12, .offset_bits = 8, .size_bits = 1 }, { PATH_REC_FIELD(numb_path), .offset_words = 12, .offset_bits = 9, .size_bits = 7 }, { PATH_REC_FIELD(pkey), .offset_words = 12, .offset_bits = 16, .size_bits = 16 }, { RESERVED, .offset_words = 13, .offset_bits = 0, .size_bits = 12 }, { PATH_REC_FIELD(sl), .offset_words = 13, .offset_bits = 12, .size_bits = 4 }, { PATH_REC_FIELD(mtu_selector), .offset_words = 13, .offset_bits = 16, .size_bits = 2 }, { PATH_REC_FIELD(mtu), .offset_words = 13, .offset_bits = 18, .size_bits = 6 }, { PATH_REC_FIELD(rate_selector), .offset_words = 13, .offset_bits = 24, .size_bits = 2 }, { PATH_REC_FIELD(rate), .offset_words = 13, .offset_bits = 26, .size_bits = 6 }, { PATH_REC_FIELD(packet_life_time_selector), .offset_words = 14, .offset_bits = 0, .size_bits = 2 }, { PATH_REC_FIELD(packet_life_time), .offset_words = 14, .offset_bits = 2, .size_bits = 6 }, { PATH_REC_FIELD(preference), .offset_words = 14, .offset_bits = 8, .size_bits = 8 }, { RESERVED, .offset_words = 14, .offset_bits = 16, .size_bits = 48 }, }; #define MCMEMBER_REC_FIELD(field) \ .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \ .struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \ .field_name = "sa_mcmember_rec:" #field static const struct ib_field mcmember_rec_table[] = { { MCMEMBER_REC_FIELD(mgid), .offset_words = 0, .offset_bits = 0, .size_bits = 128 }, { MCMEMBER_REC_FIELD(port_gid), .offset_words = 4, .offset_bits = 0, .size_bits = 128 }, { MCMEMBER_REC_FIELD(qkey), .offset_words = 8, .offset_bits = 0, .size_bits = 32 }, { MCMEMBER_REC_FIELD(mlid), .offset_words = 9, .offset_bits = 0, .size_bits = 16 }, { MCMEMBER_REC_FIELD(mtu_selector), .offset_words = 9, .offset_bits = 16, .size_bits = 2 }, { MCMEMBER_REC_FIELD(mtu), .offset_words = 9, .offset_bits = 18, .size_bits = 6 }, { MCMEMBER_REC_FIELD(traffic_class), .offset_words = 9, .offset_bits = 24, .size_bits = 8 }, { MCMEMBER_REC_FIELD(pkey), .offset_words = 10, .offset_bits = 0, .size_bits = 16 }, { MCMEMBER_REC_FIELD(rate_selector), .offset_words = 10, .offset_bits = 16, .size_bits = 2 }, { MCMEMBER_REC_FIELD(rate), .offset_words = 10, .offset_bits = 18, .size_bits = 6 }, { MCMEMBER_REC_FIELD(packet_life_time_selector), .offset_words = 10, .offset_bits = 24, .size_bits = 2 }, { MCMEMBER_REC_FIELD(packet_life_time), .offset_words = 10, .offset_bits = 26, .size_bits = 6 }, { MCMEMBER_REC_FIELD(sl), .offset_words = 11, .offset_bits = 0, .size_bits = 4 }, { MCMEMBER_REC_FIELD(flow_label), .offset_words = 11, .offset_bits = 4, .size_bits = 20 }, { MCMEMBER_REC_FIELD(hop_limit), .offset_words = 11, .offset_bits = 24, .size_bits = 8 }, { MCMEMBER_REC_FIELD(scope), .offset_words = 12, .offset_bits = 0, .size_bits = 4 }, { MCMEMBER_REC_FIELD(join_state), .offset_words = 12, .offset_bits = 4, .size_bits = 4 }, { MCMEMBER_REC_FIELD(proxy_join), .offset_words = 12, .offset_bits = 8, .size_bits = 1 }, { RESERVED, .offset_words = 12, .offset_bits = 9, .size_bits = 23 }, }; #define SERVICE_REC_FIELD(field) \ .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \ .struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \ .field_name = "sa_service_rec:" #field static const struct ib_field service_rec_table[] = { { SERVICE_REC_FIELD(id), .offset_words = 0, .offset_bits = 0, .size_bits = 64 }, { SERVICE_REC_FIELD(gid), .offset_words = 2, .offset_bits = 0, .size_bits = 128 }, { SERVICE_REC_FIELD(pkey), .offset_words = 6, .offset_bits = 0, .size_bits = 16 }, { SERVICE_REC_FIELD(lease), .offset_words = 7, .offset_bits = 0, .size_bits = 32 }, { SERVICE_REC_FIELD(key), .offset_words = 8, .offset_bits = 0, .size_bits = 128 }, { SERVICE_REC_FIELD(name), .offset_words = 12, .offset_bits = 0, .size_bits = 64*8 }, { SERVICE_REC_FIELD(data8), .offset_words = 28, .offset_bits = 0, .size_bits = 16*8 }, { SERVICE_REC_FIELD(data16), .offset_words = 32, .offset_bits = 0, .size_bits = 8*16 }, { SERVICE_REC_FIELD(data32), .offset_words = 36, .offset_bits = 0, .size_bits = 4*32 }, { SERVICE_REC_FIELD(data64), .offset_words = 40, .offset_bits = 0, .size_bits = 2*64 }, }; static void free_sm_ah(struct kref *kref) { struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref); ib_destroy_ah(sm_ah->ah); kfree(sm_ah); } static void update_sm_ah(void *port_ptr) { struct ib_sa_port *port = port_ptr; struct ib_sa_sm_ah *new_ah, *old_ah; struct ib_port_attr port_attr; struct ib_ah_attr ah_attr; if (ib_query_port(port->agent->device, port->port_num, &port_attr)) { printk(KERN_WARNING "Couldn't query port\n"); return; } new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL); if (!new_ah) { printk(KERN_WARNING "Couldn't allocate new SM AH\n"); return; } kref_init(&new_ah->ref); memset(&ah_attr, 0, sizeof ah_attr); ah_attr.dlid = port_attr.sm_lid; ah_attr.sl = port_attr.sm_sl; ah_attr.port_num = port->port_num; new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr); if (IS_ERR(new_ah->ah)) { printk(KERN_WARNING "Couldn't create new SM AH\n"); kfree(new_ah); return; } spin_lock_irq(&port->ah_lock); old_ah = port->sm_ah; port->sm_ah = new_ah; spin_unlock_irq(&port->ah_lock); if (old_ah) kref_put(&old_ah->ref, free_sm_ah); } static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event) { if (event->event == IB_EVENT_PORT_ERR || event->event == IB_EVENT_PORT_ACTIVE || event->event == IB_EVENT_LID_CHANGE || event->event == IB_EVENT_PKEY_CHANGE || event->event == IB_EVENT_SM_CHANGE) { struct ib_sa_device *sa_dev; sa_dev = container_of(handler, typeof(*sa_dev), event_handler); schedule_work(&sa_dev->port[event->element.port_num - sa_dev->start_port].update_task); } } /** * ib_sa_cancel_query - try to cancel an SA query * @id:ID of query to cancel * @query:query pointer to cancel * * Try to cancel an SA query. If the id and query don't match up or * the query has already completed, nothing is done. Otherwise the * query is canceled and will complete with a status of -EINTR. */ void ib_sa_cancel_query(int id, struct ib_sa_query *query) { unsigned long flags; struct ib_mad_agent *agent; spin_lock_irqsave(&idr_lock, flags); if (idr_find(&query_idr, id) != query) { spin_unlock_irqrestore(&idr_lock, flags); return; } agent = query->port->agent; spin_unlock_irqrestore(&idr_lock, flags); ib_cancel_mad(agent, id); } EXPORT_SYMBOL(ib_sa_cancel_query); static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent) { unsigned long flags; memset(mad, 0, sizeof *mad); mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION; mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM; mad->mad_hdr.class_version = IB_SA_CLASS_VERSION; spin_lock_irqsave(&tid_lock, flags); mad->mad_hdr.tid = cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++); spin_unlock_irqrestore(&tid_lock, flags); } static int send_mad(struct ib_sa_query *query, int timeout_ms) { struct ib_sa_port *port = query->port; unsigned long flags; int ret; struct ib_sge gather_list; struct ib_send_wr *bad_wr, wr = { .opcode = IB_WR_SEND, .sg_list = &gather_list, .num_sge = 1, .send_flags = IB_SEND_SIGNALED, .wr = { .ud = { .mad_hdr = &query->mad->mad_hdr, .remote_qpn = 1, .remote_qkey = IB_QP1_QKEY, .timeout_ms = timeout_ms, } } }; retry: if (!idr_pre_get(&query_idr, GFP_ATOMIC)) return -ENOMEM; spin_lock_irqsave(&idr_lock, flags); ret = idr_get_new(&query_idr, query, &query->id); spin_unlock_irqrestore(&idr_lock, flags); if (ret == -EAGAIN) goto retry; if (ret) return ret; wr.wr_id = query->id; spin_lock_irqsave(&port->ah_lock, flags); kref_get(&port->sm_ah->ref); query->sm_ah = port->sm_ah; wr.wr.ud.ah = port->sm_ah->ah; spin_unlock_irqrestore(&port->ah_lock, flags); gather_list.addr = dma_map_single(port->agent->device->dma_device, query->mad, sizeof (struct ib_sa_mad), DMA_TO_DEVICE); gather_list.length = sizeof (struct ib_sa_mad); gather_list.lkey = port->agent->mr->lkey; pci_unmap_addr_set(query, mapping, gather_list.addr); ret = ib_post_send_mad(port->agent, &wr, &bad_wr); if (ret) { dma_unmap_single(port->agent->device->dma_device, pci_unmap_addr(query, mapping), sizeof (struct ib_sa_mad), DMA_TO_DEVICE); kref_put(&query->sm_ah->ref, free_sm_ah); spin_lock_irqsave(&idr_lock, flags); idr_remove(&query_idr, query->id); spin_unlock_irqrestore(&idr_lock, flags); } /* * It's not safe to dereference query any more, because the * send may already have completed and freed the query in * another context. So use wr.wr_id, which has a copy of the * query's id. */ return ret ? ret : wr.wr_id; } static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query, int status, struct ib_sa_mad *mad) { struct ib_sa_path_query *query = container_of(sa_query, struct ib_sa_path_query, sa_query); if (mad) { struct ib_sa_path_rec rec; ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), mad->data, &rec); query->callback(status, &rec, query->context); } else query->callback(status, NULL, query->context); } static void ib_sa_path_rec_release(struct ib_sa_query *sa_query) { kfree(sa_query->mad); kfree(container_of(sa_query, struct ib_sa_path_query, sa_query)); } /** * ib_sa_path_rec_get - Start a Path get query * @device:device to send query on * @port_num: port number to send query on * @rec:Path Record to send in query * @comp_mask:component mask to send in query * @timeout_ms:time to wait for response * @gfp_mask:GFP mask to use for internal allocations * @callback:function called when query completes, times out or is * canceled * @context:opaque user context passed to callback * @sa_query:query context, used to cancel query * * Send a Path Record Get query to the SA to look up a path. The * callback function will be called when the query completes (or * fails); status is 0 for a successful response, -EINTR if the query * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error * occurred sending the query. The resp parameter of the callback is * only valid if status is 0. * * If the return value of ib_sa_path_rec_get() is negative, it is an * error code. Otherwise it is a query ID that can be used to cancel * the query. */ int ib_sa_path_rec_get(struct ib_device *device, u8 port_num, struct ib_sa_path_rec *rec, ib_sa_comp_mask comp_mask, int timeout_ms, gfp_t gfp_mask, void (*callback)(int status, struct ib_sa_path_rec *resp, void *context), void *context, struct ib_sa_query **sa_query) { struct ib_sa_path_query *query; struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); struct ib_sa_port *port; struct ib_mad_agent *agent; int ret; if (!sa_dev) return -ENODEV; port = &sa_dev->port[port_num - sa_dev->start_port]; agent = port->agent; query = kmalloc(sizeof *query, gfp_mask); if (!query) return -ENOMEM; query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask); if (!query->sa_query.mad) { kfree(query); return -ENOMEM; } query->callback = callback; query->context = context; init_mad(query->sa_query.mad, agent); query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL; query->sa_query.release = ib_sa_path_rec_release; query->sa_query.port = port; query->sa_query.mad->mad_hdr.method = IB_MGMT_METHOD_GET; query->sa_query.mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC); query->sa_query.mad->sa_hdr.comp_mask = comp_mask; ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, query->sa_query.mad->data); *sa_query = &query->sa_query; ret = send_mad(&query->sa_query, timeout_ms); if (ret < 0) { *sa_query = NULL; kfree(query->sa_query.mad); kfree(query); } return ret; } EXPORT_SYMBOL(ib_sa_path_rec_get); static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query, int status, struct ib_sa_mad *mad) { struct ib_sa_service_query *query = container_of(sa_query, struct ib_sa_service_query, sa_query); if (mad) { struct ib_sa_service_rec rec; ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table), mad->data, &rec); query->callback(status, &rec, query->context); } else query->callback(status, NULL, query->context); } static void ib_sa_service_rec_release(struct ib_sa_query *sa_query) { kfree(sa_query->mad); kfree(container_of(sa_query, struct ib_sa_service_query, sa_query)); } /** * ib_sa_service_rec_query - Start Service Record operation * @device:device to send request on * @port_num: port number to send request on * @method:SA method - should be get, set, or delete * @rec:Service Record to send in request * @comp_mask:component mask to send in request * @timeout_ms:time to wait for response * @gfp_mask:GFP mask to use for internal allocations * @callback:function called when request completes, times out or is * canceled * @context:opaque user context passed to callback * @sa_query:request context, used to cancel request * * Send a Service Record set/get/delete to the SA to register, * unregister or query a service record. * The callback function will be called when the request completes (or * fails); status is 0 for a successful response, -EINTR if the query * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error * occurred sending the query. The resp parameter of the callback is * only valid if status is 0. * * If the return value of ib_sa_service_rec_query() is negative, it is an * error code. Otherwise it is a request ID that can be used to cancel * the query. */ int ib_sa_service_rec_query(struct ib_device *device, u8 port_num, u8 method, struct ib_sa_service_rec *rec, ib_sa_comp_mask comp_mask, int timeout_ms, gfp_t gfp_mask, void (*callback)(int status, struct ib_sa_service_rec *resp, void *context), void *context, struct ib_sa_query **sa_query) { struct ib_sa_service_query *query; struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); struct ib_sa_port *port; struct ib_mad_agent *agent; int ret; if (!sa_dev) return -ENODEV; port = &sa_dev->port[port_num - sa_dev->start_port]; agent = port->agent; if (method != IB_MGMT_METHOD_GET && method != IB_MGMT_METHOD_SET && method != IB_SA_METHOD_DELETE) return -EINVAL; query = kmalloc(sizeof *query, gfp_mask); if (!query) return -ENOMEM; query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask); if (!query->sa_query.mad) { kfree(query); return -ENOMEM; } query->callback = callback; query->context = context; init_mad(query->sa_query.mad, agent); query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL; query->sa_query.release = ib_sa_service_rec_release; query->sa_query.port = port; query->sa_query.mad->mad_hdr.method = method; query->sa_query.mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC); query->sa_query.mad->sa_hdr.comp_mask = comp_mask; ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table), rec, query->sa_query.mad->data); *sa_query = &query->sa_query; ret = send_mad(&query->sa_query, timeout_ms); if (ret < 0) { *sa_query = NULL; kfree(query->sa_query.mad); kfree(query); } return ret; } EXPORT_SYMBOL(ib_sa_service_rec_query); static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query, int status, struct ib_sa_mad *mad) { struct ib_sa_mcmember_query *query = container_of(sa_query, struct ib_sa_mcmember_query, sa_query); if (mad) { struct ib_sa_mcmember_rec rec; ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), mad->data, &rec); query->callback(status, &rec, query->context); } else query->callback(status, NULL, query->context); } static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query) { kfree(sa_query->mad); kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query)); } int ib_sa_mcmember_rec_query(struct ib_device *device, u8 port_num, u8 method, struct ib_sa_mcmember_rec *rec, ib_sa_comp_mask comp_mask, int timeout_ms, gfp_t gfp_mask, void (*callback)(int status, struct ib_sa_mcmember_rec *resp, void *context), void *context, struct ib_sa_query **sa_query) { struct ib_sa_mcmember_query *query; struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); struct ib_sa_port *port; struct ib_mad_agent *agent; int ret; if (!sa_dev) return -ENODEV; port = &sa_dev->port[port_num - sa_dev->start_port]; agent = port->agent; query = kmalloc(sizeof *query, gfp_mask); if (!query) return -ENOMEM; query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask); if (!query->sa_query.mad) { kfree(query); return -ENOMEM; } query->callback = callback; query->context = context; init_mad(query->sa_query.mad, agent); query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL; query->sa_query.release = ib_sa_mcmember_rec_release; query->sa_query.port = port; query->sa_query.mad->mad_hdr.method = method; query->sa_query.mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC); query->sa_query.mad->sa_hdr.comp_mask = comp_mask; ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), rec, query->sa_query.mad->data); *sa_query = &query->sa_query; ret = send_mad(&query->sa_query, timeout_ms); if (ret < 0) { *sa_query = NULL; kfree(query->sa_query.mad); kfree(query); } return ret; } EXPORT_SYMBOL(ib_sa_mcmember_rec_query); static void send_handler(struct ib_mad_agent *agent, struct ib_mad_send_wc *mad_send_wc) { struct ib_sa_query *query; unsigned long flags; spin_lock_irqsave(&idr_lock, flags); query = idr_find(&query_idr, mad_send_wc->wr_id); spin_unlock_irqrestore(&idr_lock, flags); if (!query) return; if (query->callback) switch (mad_send_wc->status) { case IB_WC_SUCCESS: /* No callback -- already got recv */ break; case IB_WC_RESP_TIMEOUT_ERR: query->callback(query, -ETIMEDOUT, NULL); break; case IB_WC_WR_FLUSH_ERR: query->callback(query, -EINTR, NULL); break; default: query->callback(query, -EIO, NULL); break; } dma_unmap_single(agent->device->dma_device, pci_unmap_addr(query, mapping), sizeof (struct ib_sa_mad), DMA_TO_DEVICE); kref_put(&query->sm_ah->ref, free_sm_ah); query->release(query); spin_lock_irqsave(&idr_lock, flags); idr_remove(&query_idr, mad_send_wc->wr_id); spin_unlock_irqrestore(&idr_lock, flags); } static void recv_handler(struct ib_mad_agent *mad_agent, struct ib_mad_recv_wc *mad_recv_wc) { struct ib_sa_query *query; unsigned long flags; spin_lock_irqsave(&idr_lock, flags); query = idr_find(&query_idr, mad_recv_wc->wc->wr_id); spin_unlock_irqrestore(&idr_lock, flags); if (query && query->callback) { if (mad_recv_wc->wc->status == IB_WC_SUCCESS) query->callback(query, mad_recv_wc->recv_buf.mad->mad_hdr.status ? -EINVAL : 0, (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad); else query->callback(query, -EIO, NULL); } ib_free_recv_mad(mad_recv_wc); } static void ib_sa_add_one(struct ib_device *device) { struct ib_sa_device *sa_dev; int s, e, i; if (device->node_type == IB_NODE_SWITCH) s = e = 0; else { s = 1; e = device->phys_port_cnt; } sa_dev = kmalloc(sizeof *sa_dev + (e - s + 1) * sizeof (struct ib_sa_port), GFP_KERNEL); if (!sa_dev) return; sa_dev->start_port = s; sa_dev->end_port = e; for (i = 0; i <= e - s; ++i) { sa_dev->port[i].sm_ah = NULL; sa_dev->port[i].port_num = i + s; spin_lock_init(&sa_dev->port[i].ah_lock); sa_dev->port[i].agent = ib_register_mad_agent(device, i + s, IB_QPT_GSI, NULL, 0, send_handler, recv_handler, sa_dev); if (IS_ERR(sa_dev->port[i].agent)) goto err; INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah, &sa_dev->port[i]); } ib_set_client_data(device, &sa_client, sa_dev); /* * We register our event handler after everything is set up, * and then update our cached info after the event handler is * registered to avoid any problems if a port changes state * during our initialization. */ INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event); if (ib_register_event_handler(&sa_dev->event_handler)) goto err; for (i = 0; i <= e - s; ++i) update_sm_ah(&sa_dev->port[i]); return; err: while (--i >= 0) ib_unregister_mad_agent(sa_dev->port[i].agent); kfree(sa_dev); return; } static void ib_sa_remove_one(struct ib_device *device) { struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client); int i; if (!sa_dev) return; ib_unregister_event_handler(&sa_dev->event_handler); for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) { ib_unregister_mad_agent(sa_dev->port[i].agent); kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah); } kfree(sa_dev); } static int __init ib_sa_init(void) { int ret; spin_lock_init(&idr_lock); spin_lock_init(&tid_lock); get_random_bytes(&tid, sizeof tid); ret = ib_register_client(&sa_client); if (ret) printk(KERN_ERR "Couldn't register ib_sa client\n"); return ret; } static void __exit ib_sa_cleanup(void) { ib_unregister_client(&sa_client); idr_destroy(&query_idr); } module_init(ib_sa_init); module_exit(ib_sa_cleanup);