summaryrefslogtreecommitdiffstats
path: root/drivers/infiniband/core/sa_query.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/infiniband/core/sa_query.c')
-rw-r--r--drivers/infiniband/core/sa_query.c2467
1 files changed, 2467 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..de88f472e
--- /dev/null
+++ b/drivers/infiniband/core/sa_query.c
@@ -0,0 +1,2467 @@
+/*
+ * 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));
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-07 15:41:52 +0000