| /* |
| * 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 <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/err.h> |
| #include <linux/random.h> |
| #include <linux/spinlock.h> |
| #include <linux/slab.h> |
| #include <linux/pci.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/kref.h> |
| #include <linux/idr.h> |
| |
| #include <rdma/ib_pack.h> |
| #include <rdma/ib_sa.h> |
| |
| 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 = &sa_dev->port[port_num - sa_dev->start_port]; |
| struct ib_mad_agent *agent = port->agent; |
| int ret; |
| |
| 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 = &sa_dev->port[port_num - sa_dev->start_port]; |
| struct ib_mad_agent *agent = port->agent; |
| int ret; |
| |
| 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 = &sa_dev->port[port_num - sa_dev->start_port]; |
| struct ib_mad_agent *agent = port->agent; |
| int ret; |
| |
| 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); |
| } |
| |
| module_init(ib_sa_init); |
| module_exit(ib_sa_cleanup); |