diff options
Diffstat (limited to 'drivers/infiniband/core/sa_query.c')
| -rw-r--r-- | drivers/infiniband/core/sa_query.c | 2359 |
1 files changed, 2359 insertions, 0 deletions
diff --git a/drivers/infiniband/core/sa_query.c b/drivers/infiniband/core/sa_query.c new file mode 100644 index 000000000..8c69bdb5b --- /dev/null +++ b/drivers/infiniband/core/sa_query.c @@ -0,0 +1,2359 @@ +/* + * Copyright (c) 2004 Topspin Communications. All rights reserved. + * Copyright (c) 2005 Voltaire, Inc. All rights reserved. + * Copyright (c) 2006 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. + */ + +#include <linux/init.h> +#include <linux/err.h> +#include <linux/random.h> +#include <linux/spinlock.h> +#include <linux/slab.h> +#include <linux/dma-mapping.h> +#include <linux/kref.h> +#include <linux/xarray.h> +#include <linux/workqueue.h> +#include <uapi/linux/if_ether.h> +#include <rdma/ib_pack.h> +#include <rdma/ib_cache.h> +#include <rdma/rdma_netlink.h> +#include <net/netlink.h> +#include <uapi/rdma/ib_user_sa.h> +#include <rdma/ib_marshall.h> +#include <rdma/ib_addr.h> +#include <rdma/opa_addr.h> +#include <rdma/rdma_cm.h> +#include "sa.h" +#include "core_priv.h" + +#define IB_SA_LOCAL_SVC_TIMEOUT_MIN 100 +#define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT 2000 +#define IB_SA_LOCAL_SVC_TIMEOUT_MAX 200000 +#define IB_SA_CPI_MAX_RETRY_CNT 3 +#define IB_SA_CPI_RETRY_WAIT 1000 /*msecs */ +static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT; + +struct ib_sa_sm_ah { + struct ib_ah *ah; + struct kref ref; + u16 pkey_index; + u8 src_path_mask; +}; + +enum rdma_class_port_info_type { + RDMA_CLASS_PORT_INFO_IB, + RDMA_CLASS_PORT_INFO_OPA +}; + +struct rdma_class_port_info { + enum rdma_class_port_info_type type; + union { + struct ib_class_port_info ib; + struct opa_class_port_info opa; + }; +}; + +struct ib_sa_classport_cache { + bool valid; + int retry_cnt; + struct rdma_class_port_info data; +}; + +struct ib_sa_port { + struct ib_mad_agent *agent; + struct ib_sa_sm_ah *sm_ah; + struct work_struct update_task; + struct ib_sa_classport_cache classport_info; + struct delayed_work ib_cpi_work; + spinlock_t classport_lock; /* protects class port info set */ + spinlock_t ah_lock; + u32 port_num; +}; + +struct ib_sa_device { + int start_port, end_port; + struct ib_event_handler event_handler; + struct ib_sa_port port[]; +}; + +struct ib_sa_query { + void (*callback)(struct ib_sa_query *sa_query, int status, + int num_prs, struct ib_sa_mad *mad); + void (*release)(struct ib_sa_query *); + struct ib_sa_client *client; + struct ib_sa_port *port; + struct ib_mad_send_buf *mad_buf; + struct ib_sa_sm_ah *sm_ah; + int id; + u32 flags; + struct list_head list; /* Local svc request list */ + u32 seq; /* Local svc request sequence number */ + unsigned long timeout; /* Local svc timeout */ + u8 path_use; /* How will the pathrecord be used */ + + /* A separate buffer to save pathrecords of a response, as in cases + * like IB/netlink, mulptiple pathrecords are supported, so that + * mad->data is not large enough to hold them + */ + void *resp_pr_data; +}; + +#define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001 +#define IB_SA_CANCEL 0x00000002 +#define IB_SA_QUERY_OPA 0x00000004 + +struct ib_sa_path_query { + void (*callback)(int status, struct sa_path_rec *rec, + int num_paths, void *context); + void *context; + struct ib_sa_query sa_query; + struct sa_path_rec *conv_pr; +}; + +struct ib_sa_guidinfo_query { + void (*callback)(int, struct ib_sa_guidinfo_rec *, void *); + void *context; + struct ib_sa_query sa_query; +}; + +struct ib_sa_classport_info_query { + void (*callback)(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 LIST_HEAD(ib_nl_request_list); +static DEFINE_SPINLOCK(ib_nl_request_lock); +static atomic_t ib_nl_sa_request_seq; +static struct workqueue_struct *ib_nl_wq; +static struct delayed_work ib_nl_timed_work; +static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = { + [LS_NLA_TYPE_PATH_RECORD] = {.type = NLA_BINARY, + .len = sizeof(struct ib_path_rec_data)}, + [LS_NLA_TYPE_TIMEOUT] = {.type = NLA_U32}, + [LS_NLA_TYPE_SERVICE_ID] = {.type = NLA_U64}, + [LS_NLA_TYPE_DGID] = {.type = NLA_BINARY, + .len = sizeof(struct rdma_nla_ls_gid)}, + [LS_NLA_TYPE_SGID] = {.type = NLA_BINARY, + .len = sizeof(struct rdma_nla_ls_gid)}, + [LS_NLA_TYPE_TCLASS] = {.type = NLA_U8}, + [LS_NLA_TYPE_PKEY] = {.type = NLA_U16}, + [LS_NLA_TYPE_QOS_CLASS] = {.type = NLA_U16}, +}; + + +static int ib_sa_add_one(struct ib_device *device); +static void ib_sa_remove_one(struct ib_device *device, void *client_data); + +static struct ib_client sa_client = { + .name = "sa", + .add = ib_sa_add_one, + .remove = ib_sa_remove_one +}; + +static DEFINE_XARRAY_FLAGS(queries, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ); + +static DEFINE_SPINLOCK(tid_lock); +static u32 tid; + +#define PATH_REC_FIELD(field) \ + .struct_offset_bytes = offsetof(struct sa_path_rec, field), \ + .struct_size_bytes = sizeof_field(struct sa_path_rec, field), \ + .field_name = "sa_path_rec:" #field + +static const struct ib_field path_rec_table[] = { + { PATH_REC_FIELD(service_id), + .offset_words = 0, + .offset_bits = 0, + .size_bits = 64 }, + { 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(ib.dlid), + .offset_words = 10, + .offset_bits = 0, + .size_bits = 16 }, + { PATH_REC_FIELD(ib.slid), + .offset_words = 10, + .offset_bits = 16, + .size_bits = 16 }, + { PATH_REC_FIELD(ib.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 }, + { PATH_REC_FIELD(qos_class), + .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 OPA_PATH_REC_FIELD(field) \ + .struct_offset_bytes = \ + offsetof(struct sa_path_rec, field), \ + .struct_size_bytes = \ + sizeof_field(struct sa_path_rec, field), \ + .field_name = "sa_path_rec:" #field + +static const struct ib_field opa_path_rec_table[] = { + { OPA_PATH_REC_FIELD(service_id), + .offset_words = 0, + .offset_bits = 0, + .size_bits = 64 }, + { OPA_PATH_REC_FIELD(dgid), + .offset_words = 2, + .offset_bits = 0, + .size_bits = 128 }, + { OPA_PATH_REC_FIELD(sgid), + .offset_words = 6, + .offset_bits = 0, + .size_bits = 128 }, + { OPA_PATH_REC_FIELD(opa.dlid), + .offset_words = 10, + .offset_bits = 0, + .size_bits = 32 }, + { OPA_PATH_REC_FIELD(opa.slid), + .offset_words = 11, + .offset_bits = 0, + .size_bits = 32 }, + { OPA_PATH_REC_FIELD(opa.raw_traffic), + .offset_words = 12, + .offset_bits = 0, + .size_bits = 1 }, + { RESERVED, + .offset_words = 12, + .offset_bits = 1, + .size_bits = 3 }, + { OPA_PATH_REC_FIELD(flow_label), + .offset_words = 12, + .offset_bits = 4, + .size_bits = 20 }, + { OPA_PATH_REC_FIELD(hop_limit), + .offset_words = 12, + .offset_bits = 24, + .size_bits = 8 }, + { OPA_PATH_REC_FIELD(traffic_class), + .offset_words = 13, + .offset_bits = 0, + .size_bits = 8 }, + { OPA_PATH_REC_FIELD(reversible), + .offset_words = 13, + .offset_bits = 8, + .size_bits = 1 }, + { OPA_PATH_REC_FIELD(numb_path), + .offset_words = 13, + .offset_bits = 9, + .size_bits = 7 }, + { OPA_PATH_REC_FIELD(pkey), + .offset_words = 13, + .offset_bits = 16, + .size_bits = 16 }, + { OPA_PATH_REC_FIELD(opa.l2_8B), + .offset_words = 14, + .offset_bits = 0, + .size_bits = 1 }, + { OPA_PATH_REC_FIELD(opa.l2_10B), + .offset_words = 14, + .offset_bits = 1, + .size_bits = 1 }, + { OPA_PATH_REC_FIELD(opa.l2_9B), + .offset_words = 14, + .offset_bits = 2, + .size_bits = 1 }, + { OPA_PATH_REC_FIELD(opa.l2_16B), + .offset_words = 14, + .offset_bits = 3, + .size_bits = 1 }, + { RESERVED, + .offset_words = 14, + .offset_bits = 4, + .size_bits = 2 }, + { OPA_PATH_REC_FIELD(opa.qos_type), + .offset_words = 14, + .offset_bits = 6, + .size_bits = 2 }, + { OPA_PATH_REC_FIELD(opa.qos_priority), + .offset_words = 14, + .offset_bits = 8, + .size_bits = 8 }, + { RESERVED, + .offset_words = 14, + .offset_bits = 16, + .size_bits = 3 }, + { OPA_PATH_REC_FIELD(sl), + .offset_words = 14, + .offset_bits = 19, + .size_bits = 5 }, + { RESERVED, + .offset_words = 14, + .offset_bits = 24, + .size_bits = 8 }, + { OPA_PATH_REC_FIELD(mtu_selector), + .offset_words = 15, + .offset_bits = 0, + .size_bits = 2 }, + { OPA_PATH_REC_FIELD(mtu), + .offset_words = 15, + .offset_bits = 2, + .size_bits = 6 }, + { OPA_PATH_REC_FIELD(rate_selector), + .offset_words = 15, + .offset_bits = 8, + .size_bits = 2 }, + { OPA_PATH_REC_FIELD(rate), + .offset_words = 15, + .offset_bits = 10, + .size_bits = 6 }, + { OPA_PATH_REC_FIELD(packet_life_time_selector), + .offset_words = 15, + .offset_bits = 16, + .size_bits = 2 }, + { OPA_PATH_REC_FIELD(packet_life_time), + .offset_words = 15, + .offset_bits = 18, + .size_bits = 6 }, + { OPA_PATH_REC_FIELD(preference), + .offset_words = 15, + .offset_bits = 24, + .size_bits = 8 }, +}; + +#define MCMEMBER_REC_FIELD(field) \ + .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \ + .struct_size_bytes = sizeof_field(struct ib_sa_mcmember_rec, 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 CLASSPORTINFO_REC_FIELD(field) \ + .struct_offset_bytes = offsetof(struct ib_class_port_info, field), \ + .struct_size_bytes = sizeof_field(struct ib_class_port_info, field), \ + .field_name = "ib_class_port_info:" #field + +static const struct ib_field ib_classport_info_rec_table[] = { + { CLASSPORTINFO_REC_FIELD(base_version), + .offset_words = 0, + .offset_bits = 0, + .size_bits = 8 }, + { CLASSPORTINFO_REC_FIELD(class_version), + .offset_words = 0, + .offset_bits = 8, + .size_bits = 8 }, + { CLASSPORTINFO_REC_FIELD(capability_mask), + .offset_words = 0, + .offset_bits = 16, + .size_bits = 16 }, + { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time), + .offset_words = 1, + .offset_bits = 0, + .size_bits = 32 }, + { CLASSPORTINFO_REC_FIELD(redirect_gid), + .offset_words = 2, + .offset_bits = 0, + .size_bits = 128 }, + { CLASSPORTINFO_REC_FIELD(redirect_tcslfl), + .offset_words = 6, + .offset_bits = 0, + .size_bits = 32 }, + { CLASSPORTINFO_REC_FIELD(redirect_lid), + .offset_words = 7, + .offset_bits = 0, + .size_bits = 16 }, + { CLASSPORTINFO_REC_FIELD(redirect_pkey), + .offset_words = 7, + .offset_bits = 16, + .size_bits = 16 }, + + { CLASSPORTINFO_REC_FIELD(redirect_qp), + .offset_words = 8, + .offset_bits = 0, + .size_bits = 32 }, + { CLASSPORTINFO_REC_FIELD(redirect_qkey), + .offset_words = 9, + .offset_bits = 0, + .size_bits = 32 }, + + { CLASSPORTINFO_REC_FIELD(trap_gid), + .offset_words = 10, + .offset_bits = 0, + .size_bits = 128 }, + { CLASSPORTINFO_REC_FIELD(trap_tcslfl), + .offset_words = 14, + .offset_bits = 0, + .size_bits = 32 }, + + { CLASSPORTINFO_REC_FIELD(trap_lid), + .offset_words = 15, + .offset_bits = 0, + .size_bits = 16 }, + { CLASSPORTINFO_REC_FIELD(trap_pkey), + .offset_words = 15, + .offset_bits = 16, + .size_bits = 16 }, + + { CLASSPORTINFO_REC_FIELD(trap_hlqp), + .offset_words = 16, + .offset_bits = 0, + .size_bits = 32 }, + { CLASSPORTINFO_REC_FIELD(trap_qkey), + .offset_words = 17, + .offset_bits = 0, + .size_bits = 32 }, +}; + +#define OPA_CLASSPORTINFO_REC_FIELD(field) \ + .struct_offset_bytes =\ + offsetof(struct opa_class_port_info, field), \ + .struct_size_bytes = \ + sizeof_field(struct opa_class_port_info, field), \ + .field_name = "opa_class_port_info:" #field + +static const struct ib_field opa_classport_info_rec_table[] = { + { OPA_CLASSPORTINFO_REC_FIELD(base_version), + .offset_words = 0, + .offset_bits = 0, + .size_bits = 8 }, + { OPA_CLASSPORTINFO_REC_FIELD(class_version), + .offset_words = 0, + .offset_bits = 8, + .size_bits = 8 }, + { OPA_CLASSPORTINFO_REC_FIELD(cap_mask), + .offset_words = 0, + .offset_bits = 16, + .size_bits = 16 }, + { OPA_CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time), + .offset_words = 1, + .offset_bits = 0, + .size_bits = 32 }, + { OPA_CLASSPORTINFO_REC_FIELD(redirect_gid), + .offset_words = 2, + .offset_bits = 0, + .size_bits = 128 }, + { OPA_CLASSPORTINFO_REC_FIELD(redirect_tc_fl), + .offset_words = 6, + .offset_bits = 0, + .size_bits = 32 }, + { OPA_CLASSPORTINFO_REC_FIELD(redirect_lid), + .offset_words = 7, + .offset_bits = 0, + .size_bits = 32 }, + { OPA_CLASSPORTINFO_REC_FIELD(redirect_sl_qp), + .offset_words = 8, + .offset_bits = 0, + .size_bits = 32 }, + { OPA_CLASSPORTINFO_REC_FIELD(redirect_qkey), + .offset_words = 9, + .offset_bits = 0, + .size_bits = 32 }, + { OPA_CLASSPORTINFO_REC_FIELD(trap_gid), + .offset_words = 10, + .offset_bits = 0, + .size_bits = 128 }, + { OPA_CLASSPORTINFO_REC_FIELD(trap_tc_fl), + .offset_words = 14, + .offset_bits = 0, + .size_bits = 32 }, + { OPA_CLASSPORTINFO_REC_FIELD(trap_lid), + .offset_words = 15, + .offset_bits = 0, + .size_bits = 32 }, + { OPA_CLASSPORTINFO_REC_FIELD(trap_hl_qp), + .offset_words = 16, + .offset_bits = 0, + .size_bits = 32 }, + { OPA_CLASSPORTINFO_REC_FIELD(trap_qkey), + .offset_words = 17, + .offset_bits = 0, + .size_bits = 32 }, + { OPA_CLASSPORTINFO_REC_FIELD(trap_pkey), + .offset_words = 18, + .offset_bits = 0, + .size_bits = 16 }, + { OPA_CLASSPORTINFO_REC_FIELD(redirect_pkey), + .offset_words = 18, + .offset_bits = 16, + .size_bits = 16 }, + { OPA_CLASSPORTINFO_REC_FIELD(trap_sl_rsvd), + .offset_words = 19, + .offset_bits = 0, + .size_bits = 8 }, + { RESERVED, + .offset_words = 19, + .offset_bits = 8, + .size_bits = 24 }, +}; + +#define GUIDINFO_REC_FIELD(field) \ + .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field), \ + .struct_size_bytes = sizeof_field(struct ib_sa_guidinfo_rec, field), \ + .field_name = "sa_guidinfo_rec:" #field + +static const struct ib_field guidinfo_rec_table[] = { + { GUIDINFO_REC_FIELD(lid), + .offset_words = 0, + .offset_bits = 0, + .size_bits = 16 }, + { GUIDINFO_REC_FIELD(block_num), + .offset_words = 0, + .offset_bits = 16, + .size_bits = 8 }, + { GUIDINFO_REC_FIELD(res1), + .offset_words = 0, + .offset_bits = 24, + .size_bits = 8 }, + { GUIDINFO_REC_FIELD(res2), + .offset_words = 1, + .offset_bits = 0, + .size_bits = 32 }, + { GUIDINFO_REC_FIELD(guid_info_list), + .offset_words = 2, + .offset_bits = 0, + .size_bits = 512 }, +}; + +static inline void ib_sa_disable_local_svc(struct ib_sa_query *query) +{ + query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE; +} + +static inline int ib_sa_query_cancelled(struct ib_sa_query *query) +{ + return (query->flags & IB_SA_CANCEL); +} + +static void ib_nl_set_path_rec_attrs(struct sk_buff *skb, + struct ib_sa_query *query) +{ + struct sa_path_rec *sa_rec = query->mad_buf->context[1]; + struct ib_sa_mad *mad = query->mad_buf->mad; + ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask; + u16 val16; + u64 val64; + struct rdma_ls_resolve_header *header; + + query->mad_buf->context[1] = NULL; + + /* Construct the family header first */ + header = skb_put(skb, NLMSG_ALIGN(sizeof(*header))); + strscpy_pad(header->device_name, + dev_name(&query->port->agent->device->dev), + LS_DEVICE_NAME_MAX); + header->port_num = query->port->port_num; + + if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) && + sa_rec->reversible != 0) + query->path_use = LS_RESOLVE_PATH_USE_ALL; + else + query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL; + header->path_use = query->path_use; + + /* Now build the attributes */ + if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) { + val64 = be64_to_cpu(sa_rec->service_id); + nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID, + sizeof(val64), &val64); + } + if (comp_mask & IB_SA_PATH_REC_DGID) + nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID, + sizeof(sa_rec->dgid), &sa_rec->dgid); + if (comp_mask & IB_SA_PATH_REC_SGID) + nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID, + sizeof(sa_rec->sgid), &sa_rec->sgid); + if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS) + nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS, + sizeof(sa_rec->traffic_class), &sa_rec->traffic_class); + + if (comp_mask & IB_SA_PATH_REC_PKEY) { + val16 = be16_to_cpu(sa_rec->pkey); + nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY, + sizeof(val16), &val16); + } + if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) { + val16 = be16_to_cpu(sa_rec->qos_class); + nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS, + sizeof(val16), &val16); + } +} + +static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask) +{ + int len = 0; + + if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) + len += nla_total_size(sizeof(u64)); + if (comp_mask & IB_SA_PATH_REC_DGID) + len += nla_total_size(sizeof(struct rdma_nla_ls_gid)); + if (comp_mask & IB_SA_PATH_REC_SGID) + len += nla_total_size(sizeof(struct rdma_nla_ls_gid)); + if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS) + len += nla_total_size(sizeof(u8)); + if (comp_mask & IB_SA_PATH_REC_PKEY) + len += nla_total_size(sizeof(u16)); + if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) + len += nla_total_size(sizeof(u16)); + + /* + * Make sure that at least some of the required comp_mask bits are + * set. + */ + if (WARN_ON(len == 0)) + return len; + + /* Add the family header */ + len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header)); + + return len; +} + +static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask) +{ + struct sk_buff *skb = NULL; + struct nlmsghdr *nlh; + void *data; + struct ib_sa_mad *mad; + int len; + unsigned long flags; + unsigned long delay; + gfp_t gfp_flag; + int ret; + + INIT_LIST_HEAD(&query->list); + query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq); + + mad = query->mad_buf->mad; + len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask); + if (len <= 0) + return -EMSGSIZE; + + skb = nlmsg_new(len, gfp_mask); + if (!skb) + return -ENOMEM; + + /* Put nlmsg header only for now */ + data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS, + RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST); + if (!data) { + nlmsg_free(skb); + return -EMSGSIZE; + } + + /* Add attributes */ + ib_nl_set_path_rec_attrs(skb, query); + + /* Repair the nlmsg header length */ + nlmsg_end(skb, nlh); + + gfp_flag = ((gfp_mask & GFP_ATOMIC) == GFP_ATOMIC) ? GFP_ATOMIC : + GFP_NOWAIT; + + spin_lock_irqsave(&ib_nl_request_lock, flags); + ret = rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_LS, gfp_flag); + + if (ret) + goto out; + + /* Put the request on the list.*/ + delay = msecs_to_jiffies(sa_local_svc_timeout_ms); + query->timeout = delay + jiffies; + list_add_tail(&query->list, &ib_nl_request_list); + /* Start the timeout if this is the only request */ + if (ib_nl_request_list.next == &query->list) + queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay); + +out: + spin_unlock_irqrestore(&ib_nl_request_lock, flags); + + return ret; +} + +static int ib_nl_cancel_request(struct ib_sa_query *query) +{ + unsigned long flags; + struct ib_sa_query *wait_query; + int found = 0; + + spin_lock_irqsave(&ib_nl_request_lock, flags); + list_for_each_entry(wait_query, &ib_nl_request_list, list) { + /* Let the timeout to take care of the callback */ + if (query == wait_query) { + query->flags |= IB_SA_CANCEL; + query->timeout = jiffies; + list_move(&query->list, &ib_nl_request_list); + found = 1; + mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1); + break; + } + } + spin_unlock_irqrestore(&ib_nl_request_lock, flags); + + return found; +} + +static void send_handler(struct ib_mad_agent *agent, + struct ib_mad_send_wc *mad_send_wc); + +static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query, + const struct nlmsghdr *nlh) +{ + struct ib_path_rec_data *srec, *drec; + struct ib_sa_path_query *path_query; + struct ib_mad_send_wc mad_send_wc; + const struct nlattr *head, *curr; + struct ib_sa_mad *mad = NULL; + int len, rem, num_prs = 0; + u32 mask = 0; + int status = -EIO; + + if (!query->callback) + goto out; + + path_query = container_of(query, struct ib_sa_path_query, sa_query); + mad = query->mad_buf->mad; + if (!path_query->conv_pr && + (be16_to_cpu(mad->mad_hdr.attr_id) == IB_SA_ATTR_PATH_REC)) { + /* Need a larger buffer for possible multiple PRs */ + query->resp_pr_data = kvcalloc(RDMA_PRIMARY_PATH_MAX_REC_NUM, + sizeof(*drec), GFP_KERNEL); + if (!query->resp_pr_data) { + query->callback(query, -ENOMEM, 0, NULL); + return; + } + } + + head = (const struct nlattr *) nlmsg_data(nlh); + len = nlmsg_len(nlh); + switch (query->path_use) { + case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL: + mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND; + break; + + case LS_RESOLVE_PATH_USE_ALL: + mask = IB_PATH_PRIMARY; + break; + + case LS_RESOLVE_PATH_USE_GMP: + default: + mask = IB_PATH_PRIMARY | IB_PATH_GMP | + IB_PATH_BIDIRECTIONAL; + break; + } + + drec = (struct ib_path_rec_data *)query->resp_pr_data; + nla_for_each_attr(curr, head, len, rem) { + if (curr->nla_type != LS_NLA_TYPE_PATH_RECORD) + continue; + + srec = nla_data(curr); + if ((srec->flags & mask) != mask) + continue; + + status = 0; + if (!drec) { + memcpy(mad->data, srec->path_rec, + sizeof(srec->path_rec)); + num_prs = 1; + break; + } + + memcpy(drec, srec, sizeof(*drec)); + drec++; + num_prs++; + if (num_prs >= RDMA_PRIMARY_PATH_MAX_REC_NUM) + break; + } + + if (!status) + mad->mad_hdr.method |= IB_MGMT_METHOD_RESP; + + query->callback(query, status, num_prs, mad); + kvfree(query->resp_pr_data); + query->resp_pr_data = NULL; + +out: + mad_send_wc.send_buf = query->mad_buf; + mad_send_wc.status = IB_WC_SUCCESS; + send_handler(query->mad_buf->mad_agent, &mad_send_wc); +} + +static void ib_nl_request_timeout(struct work_struct *work) +{ + unsigned long flags; + struct ib_sa_query *query; + unsigned long delay; + struct ib_mad_send_wc mad_send_wc; + int ret; + + spin_lock_irqsave(&ib_nl_request_lock, flags); + while (!list_empty(&ib_nl_request_list)) { + query = list_entry(ib_nl_request_list.next, + struct ib_sa_query, list); + + if (time_after(query->timeout, jiffies)) { + delay = query->timeout - jiffies; + if ((long)delay <= 0) + delay = 1; + queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay); + break; + } + + list_del(&query->list); + ib_sa_disable_local_svc(query); + /* Hold the lock to protect against query cancellation */ + if (ib_sa_query_cancelled(query)) + ret = -1; + else + ret = ib_post_send_mad(query->mad_buf, NULL); + if (ret) { + mad_send_wc.send_buf = query->mad_buf; + mad_send_wc.status = IB_WC_WR_FLUSH_ERR; + spin_unlock_irqrestore(&ib_nl_request_lock, flags); + send_handler(query->port->agent, &mad_send_wc); + spin_lock_irqsave(&ib_nl_request_lock, flags); + } + } + spin_unlock_irqrestore(&ib_nl_request_lock, flags); +} + +int ib_nl_handle_set_timeout(struct sk_buff *skb, + struct nlmsghdr *nlh, + struct netlink_ext_ack *extack) +{ + int timeout, delta, abs_delta; + const struct nlattr *attr; + unsigned long flags; + struct ib_sa_query *query; + long delay = 0; + struct nlattr *tb[LS_NLA_TYPE_MAX]; + int ret; + + if (!(nlh->nlmsg_flags & NLM_F_REQUEST) || + !(NETLINK_CB(skb).sk)) + return -EPERM; + + ret = nla_parse_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh), + nlmsg_len(nlh), ib_nl_policy, NULL); + attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT]; + if (ret || !attr) + goto settimeout_out; + + timeout = *(int *) nla_data(attr); + if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN) + timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN; + if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX) + timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX; + + delta = timeout - sa_local_svc_timeout_ms; + if (delta < 0) + abs_delta = -delta; + else + abs_delta = delta; + + if (delta != 0) { + spin_lock_irqsave(&ib_nl_request_lock, flags); + sa_local_svc_timeout_ms = timeout; + list_for_each_entry(query, &ib_nl_request_list, list) { + if (delta < 0 && abs_delta > query->timeout) + query->timeout = 0; + else + query->timeout += delta; + + /* Get the new delay from the first entry */ + if (!delay) { + delay = query->timeout - jiffies; + if (delay <= 0) + delay = 1; + } + } + if (delay) + mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, + (unsigned long)delay); + spin_unlock_irqrestore(&ib_nl_request_lock, flags); + } + +settimeout_out: + return 0; +} + +static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh) +{ + struct nlattr *tb[LS_NLA_TYPE_MAX]; + int ret; + + if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR) + return 0; + + ret = nla_parse_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh), + nlmsg_len(nlh), ib_nl_policy, NULL); + if (ret) + return 0; + + return 1; +} + +int ib_nl_handle_resolve_resp(struct sk_buff *skb, + struct nlmsghdr *nlh, + struct netlink_ext_ack *extack) +{ + unsigned long flags; + struct ib_sa_query *query = NULL, *iter; + struct ib_mad_send_buf *send_buf; + struct ib_mad_send_wc mad_send_wc; + int ret; + + if ((nlh->nlmsg_flags & NLM_F_REQUEST) || + !(NETLINK_CB(skb).sk)) + return -EPERM; + + spin_lock_irqsave(&ib_nl_request_lock, flags); + list_for_each_entry(iter, &ib_nl_request_list, list) { + /* + * If the query is cancelled, let the timeout routine + * take care of it. + */ + if (nlh->nlmsg_seq == iter->seq) { + if (!ib_sa_query_cancelled(iter)) { + list_del(&iter->list); + query = iter; + } + break; + } + } + + if (!query) { + spin_unlock_irqrestore(&ib_nl_request_lock, flags); + goto resp_out; + } + + send_buf = query->mad_buf; + + if (!ib_nl_is_good_resolve_resp(nlh)) { + /* if the result is a failure, send out the packet via IB */ + ib_sa_disable_local_svc(query); + ret = ib_post_send_mad(query->mad_buf, NULL); + spin_unlock_irqrestore(&ib_nl_request_lock, flags); + if (ret) { + mad_send_wc.send_buf = send_buf; + mad_send_wc.status = IB_WC_GENERAL_ERR; + send_handler(query->port->agent, &mad_send_wc); + } + } else { + spin_unlock_irqrestore(&ib_nl_request_lock, flags); + ib_nl_process_good_resolve_rsp(query, nlh); + } + +resp_out: + return 0; +} + +static void free_sm_ah(struct kref *kref) +{ + struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref); + + rdma_destroy_ah(sm_ah->ah, 0); + kfree(sm_ah); +} + +void ib_sa_register_client(struct ib_sa_client *client) +{ + atomic_set(&client->users, 1); + init_completion(&client->comp); +} +EXPORT_SYMBOL(ib_sa_register_client); + +void ib_sa_unregister_client(struct ib_sa_client *client) +{ + ib_sa_client_put(client); + wait_for_completion(&client->comp); +} +EXPORT_SYMBOL(ib_sa_unregister_client); + +/** + * 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_send_buf *mad_buf; + + xa_lock_irqsave(&queries, flags); + if (xa_load(&queries, id) != query) { + xa_unlock_irqrestore(&queries, flags); + return; + } + mad_buf = query->mad_buf; + xa_unlock_irqrestore(&queries, flags); + + /* + * If the query is still on the netlink request list, schedule + * it to be cancelled by the timeout routine. Otherwise, it has been + * sent to the MAD layer and has to be cancelled from there. + */ + if (!ib_nl_cancel_request(query)) + ib_cancel_mad(mad_buf); +} +EXPORT_SYMBOL(ib_sa_cancel_query); + +static u8 get_src_path_mask(struct ib_device *device, u32 port_num) +{ + struct ib_sa_device *sa_dev; + struct ib_sa_port *port; + unsigned long flags; + u8 src_path_mask; + + sa_dev = ib_get_client_data(device, &sa_client); + if (!sa_dev) + return 0x7f; + + port = &sa_dev->port[port_num - sa_dev->start_port]; + spin_lock_irqsave(&port->ah_lock, flags); + src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f; + spin_unlock_irqrestore(&port->ah_lock, flags); + + return src_path_mask; +} + +static int init_ah_attr_grh_fields(struct ib_device *device, u32 port_num, + struct sa_path_rec *rec, + struct rdma_ah_attr *ah_attr, + const struct ib_gid_attr *gid_attr) +{ + enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec); + + if (!gid_attr) { + gid_attr = rdma_find_gid_by_port(device, &rec->sgid, type, + port_num, NULL); + if (IS_ERR(gid_attr)) + return PTR_ERR(gid_attr); + } else + rdma_hold_gid_attr(gid_attr); + + rdma_move_grh_sgid_attr(ah_attr, &rec->dgid, + be32_to_cpu(rec->flow_label), + rec->hop_limit, rec->traffic_class, + gid_attr); + return 0; +} + +/** + * ib_init_ah_attr_from_path - Initialize address handle attributes based on + * an SA path record. + * @device: Device associated ah attributes initialization. + * @port_num: Port on the specified device. + * @rec: path record entry to use for ah attributes initialization. + * @ah_attr: address handle attributes to initialization from path record. + * @gid_attr: SGID attribute to consider during initialization. + * + * When ib_init_ah_attr_from_path() returns success, + * (a) for IB link layer it optionally contains a reference to SGID attribute + * when GRH is present for IB link layer. + * (b) for RoCE link layer it contains a reference to SGID attribute. + * User must invoke rdma_destroy_ah_attr() to release reference to SGID + * attributes which are initialized using ib_init_ah_attr_from_path(). + */ +int ib_init_ah_attr_from_path(struct ib_device *device, u32 port_num, + struct sa_path_rec *rec, + struct rdma_ah_attr *ah_attr, + const struct ib_gid_attr *gid_attr) +{ + int ret = 0; + + memset(ah_attr, 0, sizeof(*ah_attr)); + ah_attr->type = rdma_ah_find_type(device, port_num); + rdma_ah_set_sl(ah_attr, rec->sl); + rdma_ah_set_port_num(ah_attr, port_num); + rdma_ah_set_static_rate(ah_attr, rec->rate); + + if (sa_path_is_roce(rec)) { + ret = roce_resolve_route_from_path(rec, gid_attr); + if (ret) + return ret; + + memcpy(ah_attr->roce.dmac, sa_path_get_dmac(rec), ETH_ALEN); + } else { + rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec))); + if (sa_path_is_opa(rec) && + rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE)) + rdma_ah_set_make_grd(ah_attr, true); + + rdma_ah_set_path_bits(ah_attr, + be32_to_cpu(sa_path_get_slid(rec)) & + get_src_path_mask(device, port_num)); + } + + if (rec->hop_limit > 0 || sa_path_is_roce(rec)) + ret = init_ah_attr_grh_fields(device, port_num, + rec, ah_attr, gid_attr); + return ret; +} +EXPORT_SYMBOL(ib_init_ah_attr_from_path); + +static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask) +{ + struct rdma_ah_attr ah_attr; + unsigned long flags; + + spin_lock_irqsave(&query->port->ah_lock, flags); + if (!query->port->sm_ah) { + spin_unlock_irqrestore(&query->port->ah_lock, flags); + return -EAGAIN; + } + kref_get(&query->port->sm_ah->ref); + query->sm_ah = query->port->sm_ah; + spin_unlock_irqrestore(&query->port->ah_lock, flags); + + /* + * Always check if sm_ah has valid dlid assigned, + * before querying for class port info + */ + if ((rdma_query_ah(query->sm_ah->ah, &ah_attr) < 0) || + !rdma_is_valid_unicast_lid(&ah_attr)) { + kref_put(&query->sm_ah->ref, free_sm_ah); + return -EAGAIN; + } + query->mad_buf = ib_create_send_mad(query->port->agent, 1, + query->sm_ah->pkey_index, + 0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA, + gfp_mask, + ((query->flags & IB_SA_QUERY_OPA) ? + OPA_MGMT_BASE_VERSION : + IB_MGMT_BASE_VERSION)); + if (IS_ERR(query->mad_buf)) { + kref_put(&query->sm_ah->ref, free_sm_ah); + return -ENOMEM; + } + + query->mad_buf->ah = query->sm_ah->ah; + + return 0; +} + +static void free_mad(struct ib_sa_query *query) +{ + ib_free_send_mad(query->mad_buf); + kref_put(&query->sm_ah->ref, free_sm_ah); +} + +static void init_mad(struct ib_sa_query *query, struct ib_mad_agent *agent) +{ + struct ib_sa_mad *mad = query->mad_buf->mad; + unsigned long flags; + + memset(mad, 0, sizeof *mad); + + if (query->flags & IB_SA_QUERY_OPA) { + mad->mad_hdr.base_version = OPA_MGMT_BASE_VERSION; + mad->mad_hdr.class_version = OPA_SA_CLASS_VERSION; + } else { + mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION; + mad->mad_hdr.class_version = IB_SA_CLASS_VERSION; + } + mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM; + 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, unsigned long timeout_ms, + gfp_t gfp_mask) +{ + unsigned long flags; + int ret, id; + const int nmbr_sa_query_retries = 10; + + xa_lock_irqsave(&queries, flags); + ret = __xa_alloc(&queries, &id, query, xa_limit_32b, gfp_mask); + xa_unlock_irqrestore(&queries, flags); + if (ret < 0) + return ret; + + query->mad_buf->timeout_ms = timeout_ms / nmbr_sa_query_retries; + query->mad_buf->retries = nmbr_sa_query_retries; + if (!query->mad_buf->timeout_ms) { + /* Special case, very small timeout_ms */ + query->mad_buf->timeout_ms = 1; + query->mad_buf->retries = timeout_ms; + } + query->mad_buf->context[0] = query; + query->id = id; + + if ((query->flags & IB_SA_ENABLE_LOCAL_SERVICE) && + (!(query->flags & IB_SA_QUERY_OPA))) { + if (rdma_nl_chk_listeners(RDMA_NL_GROUP_LS)) { + if (!ib_nl_make_request(query, gfp_mask)) + return id; + } + ib_sa_disable_local_svc(query); + } + + ret = ib_post_send_mad(query->mad_buf, NULL); + if (ret) { + xa_lock_irqsave(&queries, flags); + __xa_erase(&queries, id); + xa_unlock_irqrestore(&queries, flags); + } + + /* + * It's not safe to dereference query any more, because the + * send may already have completed and freed the query in + * another context. + */ + return ret ? ret : id; +} + +void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec) +{ + ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec); +} +EXPORT_SYMBOL(ib_sa_unpack_path); + +void ib_sa_pack_path(struct sa_path_rec *rec, void *attribute) +{ + ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute); +} +EXPORT_SYMBOL(ib_sa_pack_path); + +static bool ib_sa_opa_pathrecord_support(struct ib_sa_client *client, + struct ib_sa_device *sa_dev, + u32 port_num) +{ + struct ib_sa_port *port; + unsigned long flags; + bool ret = false; + + port = &sa_dev->port[port_num - sa_dev->start_port]; + spin_lock_irqsave(&port->classport_lock, flags); + if (!port->classport_info.valid) + goto ret; + + if (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_OPA) + ret = opa_get_cpi_capmask2(&port->classport_info.data.opa) & + OPA_CLASS_PORT_INFO_PR_SUPPORT; +ret: + spin_unlock_irqrestore(&port->classport_lock, flags); + return ret; +} + +enum opa_pr_supported { + PR_NOT_SUPPORTED, + PR_OPA_SUPPORTED, + PR_IB_SUPPORTED +}; + +/* + * opa_pr_query_possible - Check if current PR query can be an OPA query. + * + * Retuns PR_NOT_SUPPORTED if a path record query is not + * possible, PR_OPA_SUPPORTED if an OPA path record query + * is possible and PR_IB_SUPPORTED if an IB path record + * query is possible. + */ +static int opa_pr_query_possible(struct ib_sa_client *client, + struct ib_sa_device *sa_dev, + struct ib_device *device, u32 port_num) +{ + struct ib_port_attr port_attr; + + if (ib_query_port(device, port_num, &port_attr)) + return PR_NOT_SUPPORTED; + + if (ib_sa_opa_pathrecord_support(client, sa_dev, port_num)) + return PR_OPA_SUPPORTED; + + if (port_attr.lid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) + return PR_NOT_SUPPORTED; + else + return PR_IB_SUPPORTED; +} + +static void ib_sa_pr_callback_single(struct ib_sa_path_query *query, + int status, struct ib_sa_mad *mad) +{ + struct sa_path_rec rec = {}; + + ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), + mad->data, &rec); + rec.rec_type = SA_PATH_REC_TYPE_IB; + sa_path_set_dmac_zero(&rec); + + if (query->conv_pr) { + struct sa_path_rec opa; + + memset(&opa, 0, sizeof(struct sa_path_rec)); + sa_convert_path_ib_to_opa(&opa, &rec); + query->callback(status, &opa, 1, query->context); + } else { + query->callback(status, &rec, 1, query->context); + } +} + +/** + * ib_sa_pr_callback_multiple() - Parse path records then do callback. + * + * In a multiple-PR case the PRs are saved in "query->resp_pr_data" + * (instead of"mad->data") and with "ib_path_rec_data" structure format, + * so that rec->flags can be set to indicate the type of PR. + * This is valid only in IB fabric. + */ +static void ib_sa_pr_callback_multiple(struct ib_sa_path_query *query, + int status, int num_prs, + struct ib_path_rec_data *rec_data) +{ + struct sa_path_rec *rec; + int i; + + rec = kvcalloc(num_prs, sizeof(*rec), GFP_KERNEL); + if (!rec) { + query->callback(-ENOMEM, NULL, 0, query->context); + return; + } + + for (i = 0; i < num_prs; i++) { + ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), + rec_data[i].path_rec, rec + i); + rec[i].rec_type = SA_PATH_REC_TYPE_IB; + sa_path_set_dmac_zero(rec + i); + rec[i].flags = rec_data[i].flags; + } + + query->callback(status, rec, num_prs, query->context); + kvfree(rec); +} + +static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query, + int status, int num_prs, + struct ib_sa_mad *mad) +{ + struct ib_sa_path_query *query = + container_of(sa_query, struct ib_sa_path_query, sa_query); + struct sa_path_rec rec; + + if (!mad || !num_prs) { + query->callback(status, NULL, 0, query->context); + return; + } + + if (sa_query->flags & IB_SA_QUERY_OPA) { + if (num_prs != 1) { + query->callback(-EINVAL, NULL, 0, query->context); + return; + } + + ib_unpack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table), + mad->data, &rec); + rec.rec_type = SA_PATH_REC_TYPE_OPA; + query->callback(status, &rec, num_prs, query->context); + } else { + if (!sa_query->resp_pr_data) + ib_sa_pr_callback_single(query, status, mad); + else + ib_sa_pr_callback_multiple(query, status, num_prs, + sa_query->resp_pr_data); + } +} + +static void ib_sa_path_rec_release(struct ib_sa_query *sa_query) +{ + struct ib_sa_path_query *query = + container_of(sa_query, struct ib_sa_path_query, sa_query); + + kfree(query->conv_pr); + kfree(query); +} + +/** + * ib_sa_path_rec_get - Start a Path get query + * @client:SA client + * @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_sa_client *client, + struct ib_device *device, u32 port_num, + struct sa_path_rec *rec, + ib_sa_comp_mask comp_mask, + unsigned long timeout_ms, gfp_t gfp_mask, + void (*callback)(int status, + struct sa_path_rec *resp, + int num_paths, 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; + struct ib_sa_mad *mad; + enum opa_pr_supported status; + int ret; + + if (!sa_dev) + return -ENODEV; + + if ((rec->rec_type != SA_PATH_REC_TYPE_IB) && + (rec->rec_type != SA_PATH_REC_TYPE_OPA)) + return -EINVAL; + + port = &sa_dev->port[port_num - sa_dev->start_port]; + agent = port->agent; + + query = kzalloc(sizeof(*query), gfp_mask); + if (!query) + return -ENOMEM; + + query->sa_query.port = port; + if (rec->rec_type == SA_PATH_REC_TYPE_OPA) { + status = opa_pr_query_possible(client, sa_dev, device, port_num); + if (status == PR_NOT_SUPPORTED) { + ret = -EINVAL; + goto err1; + } else if (status == PR_OPA_SUPPORTED) { + query->sa_query.flags |= IB_SA_QUERY_OPA; + } else { + query->conv_pr = + kmalloc(sizeof(*query->conv_pr), gfp_mask); + if (!query->conv_pr) { + ret = -ENOMEM; + goto err1; + } + } + } + + ret = alloc_mad(&query->sa_query, gfp_mask); + if (ret) + goto err2; + + ib_sa_client_get(client); + query->sa_query.client = client; + query->callback = callback; + query->context = context; + + mad = query->sa_query.mad_buf->mad; + init_mad(&query->sa_query, agent); + + query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL; + query->sa_query.release = ib_sa_path_rec_release; + mad->mad_hdr.method = IB_MGMT_METHOD_GET; + mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC); + mad->sa_hdr.comp_mask = comp_mask; + + if (query->sa_query.flags & IB_SA_QUERY_OPA) { + ib_pack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table), + rec, mad->data); + } else if (query->conv_pr) { + sa_convert_path_opa_to_ib(query->conv_pr, rec); + ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), + query->conv_pr, mad->data); + } else { + ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), + rec, mad->data); + } + + *sa_query = &query->sa_query; + + query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE; + query->sa_query.mad_buf->context[1] = (query->conv_pr) ? + query->conv_pr : rec; + + ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); + if (ret < 0) + goto err3; + + return ret; + +err3: + *sa_query = NULL; + ib_sa_client_put(query->sa_query.client); + free_mad(&query->sa_query); +err2: + kfree(query->conv_pr); +err1: + kfree(query); + return ret; +} +EXPORT_SYMBOL(ib_sa_path_rec_get); + +static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query, + int status, int num_prs, + 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(container_of(sa_query, struct ib_sa_mcmember_query, sa_query)); +} + +int ib_sa_mcmember_rec_query(struct ib_sa_client *client, + struct ib_device *device, u32 port_num, + u8 method, + struct ib_sa_mcmember_rec *rec, + ib_sa_comp_mask comp_mask, + unsigned long 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; + struct ib_sa_mad *mad; + int ret; + + if (!sa_dev) + return -ENODEV; + + port = &sa_dev->port[port_num - sa_dev->start_port]; + agent = port->agent; + + query = kzalloc(sizeof(*query), gfp_mask); + if (!query) + return -ENOMEM; + + query->sa_query.port = port; + ret = alloc_mad(&query->sa_query, gfp_mask); + if (ret) + goto err1; + + ib_sa_client_get(client); + query->sa_query.client = client; + query->callback = callback; + query->context = context; + + mad = query->sa_query.mad_buf->mad; + init_mad(&query->sa_query, agent); + + query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL; + query->sa_query.release = ib_sa_mcmember_rec_release; + mad->mad_hdr.method = method; + mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC); + mad->sa_hdr.comp_mask = comp_mask; + + ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table), + rec, mad->data); + + *sa_query = &query->sa_query; + + ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); + if (ret < 0) + goto err2; + + return ret; + +err2: + *sa_query = NULL; + ib_sa_client_put(query->sa_query.client); + free_mad(&query->sa_query); + +err1: + kfree(query); + return ret; +} + +/* Support GuidInfoRecord */ +static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query, + int status, int num_paths, + struct ib_sa_mad *mad) +{ + struct ib_sa_guidinfo_query *query = + container_of(sa_query, struct ib_sa_guidinfo_query, sa_query); + + if (mad) { + struct ib_sa_guidinfo_rec rec; + + ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), + mad->data, &rec); + query->callback(status, &rec, query->context); + } else + query->callback(status, NULL, query->context); +} + +static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query) +{ + kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query)); +} + +int ib_sa_guid_info_rec_query(struct ib_sa_client *client, + struct ib_device *device, u32 port_num, + struct ib_sa_guidinfo_rec *rec, + ib_sa_comp_mask comp_mask, u8 method, + unsigned long timeout_ms, gfp_t gfp_mask, + void (*callback)(int status, + struct ib_sa_guidinfo_rec *resp, + void *context), + void *context, + struct ib_sa_query **sa_query) +{ + struct ib_sa_guidinfo_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; + struct ib_sa_mad *mad; + int ret; + + if (!sa_dev) + return -ENODEV; + + if (method != IB_MGMT_METHOD_GET && + method != IB_MGMT_METHOD_SET && + method != IB_SA_METHOD_DELETE) { + return -EINVAL; + } + + port = &sa_dev->port[port_num - sa_dev->start_port]; + agent = port->agent; + + query = kzalloc(sizeof(*query), gfp_mask); + if (!query) + return -ENOMEM; + + query->sa_query.port = port; + ret = alloc_mad(&query->sa_query, gfp_mask); + if (ret) + goto err1; + + ib_sa_client_get(client); + query->sa_query.client = client; + query->callback = callback; + query->context = context; + + mad = query->sa_query.mad_buf->mad; + init_mad(&query->sa_query, agent); + + query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL; + query->sa_query.release = ib_sa_guidinfo_rec_release; + + mad->mad_hdr.method = method; + mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC); + mad->sa_hdr.comp_mask = comp_mask; + + ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec, + mad->data); + + *sa_query = &query->sa_query; + + ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); + if (ret < 0) + goto err2; + + return ret; + +err2: + *sa_query = NULL; + ib_sa_client_put(query->sa_query.client); + free_mad(&query->sa_query); + +err1: + kfree(query); + return ret; +} +EXPORT_SYMBOL(ib_sa_guid_info_rec_query); + +struct ib_classport_info_context { + struct completion done; + struct ib_sa_query *sa_query; +}; + +static void ib_classportinfo_cb(void *context) +{ + struct ib_classport_info_context *cb_ctx = context; + + complete(&cb_ctx->done); +} + +static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query, + int status, int num_prs, + struct ib_sa_mad *mad) +{ + unsigned long flags; + struct ib_sa_classport_info_query *query = + container_of(sa_query, struct ib_sa_classport_info_query, sa_query); + struct ib_sa_classport_cache *info = &sa_query->port->classport_info; + + if (mad) { + if (sa_query->flags & IB_SA_QUERY_OPA) { + struct opa_class_port_info rec; + + ib_unpack(opa_classport_info_rec_table, + ARRAY_SIZE(opa_classport_info_rec_table), + mad->data, &rec); + + spin_lock_irqsave(&sa_query->port->classport_lock, + flags); + if (!status && !info->valid) { + memcpy(&info->data.opa, &rec, + sizeof(info->data.opa)); + + info->valid = true; + info->data.type = RDMA_CLASS_PORT_INFO_OPA; + } + spin_unlock_irqrestore(&sa_query->port->classport_lock, + flags); + + } else { + struct ib_class_port_info rec; + + ib_unpack(ib_classport_info_rec_table, + ARRAY_SIZE(ib_classport_info_rec_table), + mad->data, &rec); + + spin_lock_irqsave(&sa_query->port->classport_lock, + flags); + if (!status && !info->valid) { + memcpy(&info->data.ib, &rec, + sizeof(info->data.ib)); + + info->valid = true; + info->data.type = RDMA_CLASS_PORT_INFO_IB; + } + spin_unlock_irqrestore(&sa_query->port->classport_lock, + flags); + } + } + query->callback(query->context); +} + +static void ib_sa_classport_info_rec_release(struct ib_sa_query *sa_query) +{ + kfree(container_of(sa_query, struct ib_sa_classport_info_query, + sa_query)); +} + +static int ib_sa_classport_info_rec_query(struct ib_sa_port *port, + unsigned long timeout_ms, + void (*callback)(void *context), + void *context, + struct ib_sa_query **sa_query) +{ + struct ib_mad_agent *agent; + struct ib_sa_classport_info_query *query; + struct ib_sa_mad *mad; + gfp_t gfp_mask = GFP_KERNEL; + int ret; + + agent = port->agent; + + query = kzalloc(sizeof(*query), gfp_mask); + if (!query) + return -ENOMEM; + + query->sa_query.port = port; + query->sa_query.flags |= rdma_cap_opa_ah(port->agent->device, + port->port_num) ? + IB_SA_QUERY_OPA : 0; + ret = alloc_mad(&query->sa_query, gfp_mask); + if (ret) + goto err_free; + + query->callback = callback; + query->context = context; + + mad = query->sa_query.mad_buf->mad; + init_mad(&query->sa_query, agent); + + query->sa_query.callback = ib_sa_classport_info_rec_callback; + query->sa_query.release = ib_sa_classport_info_rec_release; + mad->mad_hdr.method = IB_MGMT_METHOD_GET; + mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO); + mad->sa_hdr.comp_mask = 0; + *sa_query = &query->sa_query; + + ret = send_mad(&query->sa_query, timeout_ms, gfp_mask); + if (ret < 0) + goto err_free_mad; + + return ret; + +err_free_mad: + *sa_query = NULL; + free_mad(&query->sa_query); + +err_free: + kfree(query); + return ret; +} + +static void update_ib_cpi(struct work_struct *work) +{ + struct ib_sa_port *port = + container_of(work, struct ib_sa_port, ib_cpi_work.work); + struct ib_classport_info_context *cb_context; + unsigned long flags; + int ret; + + /* If the classport info is valid, nothing + * to do here. + */ + spin_lock_irqsave(&port->classport_lock, flags); + if (port->classport_info.valid) { + spin_unlock_irqrestore(&port->classport_lock, flags); + return; + } + spin_unlock_irqrestore(&port->classport_lock, flags); + + cb_context = kmalloc(sizeof(*cb_context), GFP_KERNEL); + if (!cb_context) + goto err_nomem; + + init_completion(&cb_context->done); + + ret = ib_sa_classport_info_rec_query(port, 3000, + ib_classportinfo_cb, cb_context, + &cb_context->sa_query); + if (ret < 0) + goto free_cb_err; + wait_for_completion(&cb_context->done); +free_cb_err: + kfree(cb_context); + spin_lock_irqsave(&port->classport_lock, flags); + + /* If the classport info is still not valid, the query should have + * failed for some reason. Retry issuing the query + */ + if (!port->classport_info.valid) { + port->classport_info.retry_cnt++; + if (port->classport_info.retry_cnt <= + IB_SA_CPI_MAX_RETRY_CNT) { + unsigned long delay = + msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT); + + queue_delayed_work(ib_wq, &port->ib_cpi_work, delay); + } + } + spin_unlock_irqrestore(&port->classport_lock, flags); + +err_nomem: + return; +} + +static void send_handler(struct ib_mad_agent *agent, + struct ib_mad_send_wc *mad_send_wc) +{ + struct ib_sa_query *query = mad_send_wc->send_buf->context[0]; + unsigned long flags; + + 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, 0, NULL); + break; + case IB_WC_WR_FLUSH_ERR: + query->callback(query, -EINTR, 0, NULL); + break; + default: + query->callback(query, -EIO, 0, NULL); + break; + } + + xa_lock_irqsave(&queries, flags); + __xa_erase(&queries, query->id); + xa_unlock_irqrestore(&queries, flags); + + free_mad(query); + if (query->client) + ib_sa_client_put(query->client); + query->release(query); +} + +static void recv_handler(struct ib_mad_agent *mad_agent, + struct ib_mad_send_buf *send_buf, + struct ib_mad_recv_wc *mad_recv_wc) +{ + struct ib_sa_query *query; + + if (!send_buf) + return; + + query = send_buf->context[0]; + if (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, 1, + (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad); + else + query->callback(query, -EIO, 0, NULL); + } + + ib_free_recv_mad(mad_recv_wc); +} + +static void update_sm_ah(struct work_struct *work) +{ + struct ib_sa_port *port = + container_of(work, struct ib_sa_port, update_task); + struct ib_sa_sm_ah *new_ah; + struct ib_port_attr port_attr; + struct rdma_ah_attr ah_attr; + bool grh_required; + + if (ib_query_port(port->agent->device, port->port_num, &port_attr)) { + pr_warn("Couldn't query port\n"); + return; + } + + new_ah = kmalloc(sizeof(*new_ah), GFP_KERNEL); + if (!new_ah) + return; + + kref_init(&new_ah->ref); + new_ah->src_path_mask = (1 << port_attr.lmc) - 1; + + new_ah->pkey_index = 0; + if (ib_find_pkey(port->agent->device, port->port_num, + IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index)) + pr_err("Couldn't find index for default PKey\n"); + + memset(&ah_attr, 0, sizeof(ah_attr)); + ah_attr.type = rdma_ah_find_type(port->agent->device, + port->port_num); + rdma_ah_set_dlid(&ah_attr, port_attr.sm_lid); + rdma_ah_set_sl(&ah_attr, port_attr.sm_sl); + rdma_ah_set_port_num(&ah_attr, port->port_num); + + grh_required = rdma_is_grh_required(port->agent->device, + port->port_num); + + /* + * The OPA sm_lid of 0xFFFF needs special handling so that it can be + * differentiated from a permissive LID of 0xFFFF. We set the + * grh_required flag here so the SA can program the DGID in the + * address handle appropriately + */ + if (ah_attr.type == RDMA_AH_ATTR_TYPE_OPA && + (grh_required || + port_attr.sm_lid == be16_to_cpu(IB_LID_PERMISSIVE))) + rdma_ah_set_make_grd(&ah_attr, true); + + if (ah_attr.type == RDMA_AH_ATTR_TYPE_IB && grh_required) { + rdma_ah_set_ah_flags(&ah_attr, IB_AH_GRH); + rdma_ah_set_subnet_prefix(&ah_attr, + cpu_to_be64(port_attr.subnet_prefix)); + rdma_ah_set_interface_id(&ah_attr, + cpu_to_be64(IB_SA_WELL_KNOWN_GUID)); + } + + new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr, + RDMA_CREATE_AH_SLEEPABLE); + if (IS_ERR(new_ah->ah)) { + pr_warn("Couldn't create new SM AH\n"); + kfree(new_ah); + return; + } + + spin_lock_irq(&port->ah_lock); + if (port->sm_ah) + kref_put(&port->sm_ah->ref, free_sm_ah); + port->sm_ah = new_ah; + spin_unlock_irq(&port->ah_lock); +} + +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 || + event->event == IB_EVENT_CLIENT_REREGISTER) { + unsigned long flags; + struct ib_sa_device *sa_dev = + container_of(handler, typeof(*sa_dev), event_handler); + u32 port_num = event->element.port_num - sa_dev->start_port; + struct ib_sa_port *port = &sa_dev->port[port_num]; + + if (!rdma_cap_ib_sa(handler->device, port->port_num)) + return; + + spin_lock_irqsave(&port->ah_lock, flags); + if (port->sm_ah) + kref_put(&port->sm_ah->ref, free_sm_ah); + port->sm_ah = NULL; + spin_unlock_irqrestore(&port->ah_lock, flags); + + if (event->event == IB_EVENT_SM_CHANGE || + event->event == IB_EVENT_CLIENT_REREGISTER || + event->event == IB_EVENT_LID_CHANGE || + event->event == IB_EVENT_PORT_ACTIVE) { + unsigned long delay = + msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT); + + spin_lock_irqsave(&port->classport_lock, flags); + port->classport_info.valid = false; + port->classport_info.retry_cnt = 0; + spin_unlock_irqrestore(&port->classport_lock, flags); + queue_delayed_work(ib_wq, + &port->ib_cpi_work, delay); + } + queue_work(ib_wq, &sa_dev->port[port_num].update_task); + } +} + +static int ib_sa_add_one(struct ib_device *device) +{ + struct ib_sa_device *sa_dev; + int s, e, i; + int count = 0; + int ret; + + s = rdma_start_port(device); + e = rdma_end_port(device); + + sa_dev = kzalloc(struct_size(sa_dev, port, + size_add(size_sub(e, s), 1)), + GFP_KERNEL); + if (!sa_dev) + return -ENOMEM; + + sa_dev->start_port = s; + sa_dev->end_port = e; + + for (i = 0; i <= e - s; ++i) { + spin_lock_init(&sa_dev->port[i].ah_lock); + if (!rdma_cap_ib_sa(device, i + 1)) + continue; + + sa_dev->port[i].sm_ah = NULL; + sa_dev->port[i].port_num = i + s; + + spin_lock_init(&sa_dev->port[i].classport_lock); + sa_dev->port[i].classport_info.valid = false; + + sa_dev->port[i].agent = + ib_register_mad_agent(device, i + s, IB_QPT_GSI, + NULL, 0, send_handler, + recv_handler, sa_dev, 0); + if (IS_ERR(sa_dev->port[i].agent)) { + ret = PTR_ERR(sa_dev->port[i].agent); + goto err; + } + + INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah); + INIT_DELAYED_WORK(&sa_dev->port[i].ib_cpi_work, + update_ib_cpi); + + count++; + } + + if (!count) { + ret = -EOPNOTSUPP; + goto free; + } + + 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); + ib_register_event_handler(&sa_dev->event_handler); + + for (i = 0; i <= e - s; ++i) { + if (rdma_cap_ib_sa(device, i + 1)) + update_sm_ah(&sa_dev->port[i].update_task); + } + + return 0; + +err: + while (--i >= 0) { + if (rdma_cap_ib_sa(device, i + 1)) + ib_unregister_mad_agent(sa_dev->port[i].agent); + } +free: + kfree(sa_dev); + return ret; +} + +static void ib_sa_remove_one(struct ib_device *device, void *client_data) +{ + struct ib_sa_device *sa_dev = client_data; + int i; + + ib_unregister_event_handler(&sa_dev->event_handler); + flush_workqueue(ib_wq); + + for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) { + if (rdma_cap_ib_sa(device, i + 1)) { + cancel_delayed_work_sync(&sa_dev->port[i].ib_cpi_work); + ib_unregister_mad_agent(sa_dev->port[i].agent); + if (sa_dev->port[i].sm_ah) + kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah); + } + + } + + kfree(sa_dev); +} + +int ib_sa_init(void) +{ + int ret; + + get_random_bytes(&tid, sizeof tid); + + atomic_set(&ib_nl_sa_request_seq, 0); + + ret = ib_register_client(&sa_client); + if (ret) { + pr_err("Couldn't register ib_sa client\n"); + goto err1; + } + + ret = mcast_init(); + if (ret) { + pr_err("Couldn't initialize multicast handling\n"); + goto err2; + } + + ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM); + if (!ib_nl_wq) { + ret = -ENOMEM; + goto err3; + } + + INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout); + + return 0; + +err3: + mcast_cleanup(); +err2: + ib_unregister_client(&sa_client); +err1: + return ret; +} + +void ib_sa_cleanup(void) +{ + cancel_delayed_work(&ib_nl_timed_work); + destroy_workqueue(ib_nl_wq); + mcast_cleanup(); + ib_unregister_client(&sa_client); + WARN_ON(!xa_empty(&queries)); +} |