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- /*
- * 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/module.h>
- #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 "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;
- u8 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 *, int, struct ib_sa_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 */
- };
- #define IB_SA_ENABLE_LOCAL_SERVICE 0x00000001
- #define IB_SA_CANCEL 0x00000002
- #define IB_SA_QUERY_OPA 0x00000004
- 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 sa_path_rec *, void *);
- 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 SERVICE_REC_FIELD(field) \
- .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
- .struct_size_bytes = sizeof_field(struct ib_sa_service_rec, 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 },
- };
- #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_GMP;
- 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_mad_send_wc mad_send_wc;
- struct ib_sa_mad *mad = NULL;
- const struct nlattr *head, *curr;
- struct ib_path_rec_data *rec;
- int len, rem;
- u32 mask = 0;
- int status = -EIO;
- if (query->callback) {
- 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:
- case LS_RESOLVE_PATH_USE_GMP:
- default:
- mask = IB_PATH_PRIMARY | IB_PATH_GMP |
- IB_PATH_BIDIRECTIONAL;
- break;
- }
- nla_for_each_attr(curr, head, len, rem) {
- if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
- rec = nla_data(curr);
- /*
- * Get the first one. In the future, we may
- * need to get up to 6 pathrecords.
- */
- if ((rec->flags & mask) == mask) {
- mad = query->mad_buf->mad;
- mad->mad_hdr.method |=
- IB_MGMT_METHOD_RESP;
- memcpy(mad->data, rec->path_rec,
- sizeof(rec->path_rec));
- status = 0;
- break;
- }
- }
- }
- query->callback(query, status, mad);
- }
- 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;
- struct ib_mad_send_buf *send_buf;
- struct ib_mad_send_wc mad_send_wc;
- int found = 0;
- 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(query, &ib_nl_request_list, list) {
- /*
- * If the query is cancelled, let the timeout routine
- * take care of it.
- */
- if (nlh->nlmsg_seq == query->seq) {
- found = !ib_sa_query_cancelled(query);
- if (found)
- list_del(&query->list);
- break;
- }
- }
- if (!found) {
- 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_agent *agent;
- struct ib_mad_send_buf *mad_buf;
- xa_lock_irqsave(&queries, flags);
- if (xa_load(&queries, id) != query) {
- xa_unlock_irqrestore(&queries, flags);
- return;
- }
- agent = query->port->agent;
- 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(agent, mad_buf);
- }
- EXPORT_SYMBOL(ib_sa_cancel_query);
- static u8 get_src_path_mask(struct ib_device *device, u8 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, u8 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, u8 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;
- 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;
- 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,
- u8 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
- };
- /**
- * 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, u8 port_num,
- struct sa_path_rec *rec)
- {
- 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_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 sa_path_rec rec;
- if (sa_query->flags & IB_SA_QUERY_OPA) {
- 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, query->context);
- } else {
- 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, query->context);
- } else {
- 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)
- {
- 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, u8 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,
- 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,
- rec);
- 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_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(container_of(sa_query, struct ib_sa_service_query, sa_query));
- }
- /**
- * ib_sa_service_rec_query - Start Service Record operation
- * @client:SA client
- * @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_sa_client *client,
- struct ib_device *device, u8 port_num, u8 method,
- struct ib_sa_service_rec *rec,
- ib_sa_comp_mask comp_mask,
- unsigned long 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;
- 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;
- if (method != IB_MGMT_METHOD_GET &&
- method != IB_MGMT_METHOD_SET &&
- method != IB_SA_METHOD_DELETE)
- return -EINVAL;
- 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_service_rec_callback : NULL;
- query->sa_query.release = ib_sa_service_rec_release;
- mad->mad_hdr.method = method;
- mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
- mad->sa_hdr.comp_mask = comp_mask;
- ib_pack(service_rec_table, ARRAY_SIZE(service_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_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(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, u8 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,
- 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, u8 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);
- bool ib_sa_sendonly_fullmem_support(struct ib_sa_client *client,
- struct ib_device *device,
- u8 port_num)
- {
- struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
- struct ib_sa_port *port;
- bool ret = false;
- unsigned long flags;
- if (!sa_dev)
- return ret;
- port = &sa_dev->port[port_num - sa_dev->start_port];
- spin_lock_irqsave(&port->classport_lock, flags);
- if ((port->classport_info.valid) &&
- (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_IB))
- ret = ib_get_cpi_capmask2(&port->classport_info.data.ib)
- & IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT;
- spin_unlock_irqrestore(&port->classport_lock, flags);
- return ret;
- }
- EXPORT_SYMBOL(ib_sa_sendonly_fullmem_support);
- 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,
- 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, NULL);
- break;
- case IB_WC_WR_FLUSH_ERR:
- query->callback(query, -EINTR, NULL);
- break;
- default:
- query->callback(query, -EIO, 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,
- (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 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);
- u8 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, 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);
- flush_workqueue(ib_nl_wq);
- destroy_workqueue(ib_nl_wq);
- mcast_cleanup();
- ib_unregister_client(&sa_client);
- WARN_ON(!xa_empty(&queries));
- }
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