1000 lines
26 KiB
C
1000 lines
26 KiB
C
/*
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* Copyright (c) 2004 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Voltaire, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* $Id: sa_query.c 2811 2005-07-06 18:11:43Z halr $
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/random.h>
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#include <linux/spinlock.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/dma-mapping.h>
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#include <linux/kref.h>
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#include <linux/idr.h>
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#include <rdma/ib_pack.h>
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#include <rdma/ib_sa.h>
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MODULE_AUTHOR("Roland Dreier");
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MODULE_DESCRIPTION("InfiniBand subnet administration query support");
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MODULE_LICENSE("Dual BSD/GPL");
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struct ib_sa_sm_ah {
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struct ib_ah *ah;
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struct kref ref;
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};
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struct ib_sa_port {
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struct ib_mad_agent *agent;
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struct ib_sa_sm_ah *sm_ah;
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struct work_struct update_task;
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spinlock_t ah_lock;
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u8 port_num;
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};
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struct ib_sa_device {
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int start_port, end_port;
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struct ib_event_handler event_handler;
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struct ib_sa_port port[0];
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};
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struct ib_sa_query {
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void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
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void (*release)(struct ib_sa_query *);
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struct ib_sa_port *port;
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struct ib_sa_mad *mad;
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struct ib_sa_sm_ah *sm_ah;
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DECLARE_PCI_UNMAP_ADDR(mapping)
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int id;
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};
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struct ib_sa_service_query {
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void (*callback)(int, struct ib_sa_service_rec *, void *);
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void *context;
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struct ib_sa_query sa_query;
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};
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struct ib_sa_path_query {
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void (*callback)(int, struct ib_sa_path_rec *, void *);
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void *context;
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struct ib_sa_query sa_query;
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};
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struct ib_sa_mcmember_query {
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void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
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void *context;
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struct ib_sa_query sa_query;
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};
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static void ib_sa_add_one(struct ib_device *device);
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static void ib_sa_remove_one(struct ib_device *device);
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static struct ib_client sa_client = {
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.name = "sa",
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.add = ib_sa_add_one,
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.remove = ib_sa_remove_one
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};
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static spinlock_t idr_lock;
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static DEFINE_IDR(query_idr);
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static spinlock_t tid_lock;
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static u32 tid;
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#define PATH_REC_FIELD(field) \
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.struct_offset_bytes = offsetof(struct ib_sa_path_rec, field), \
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.struct_size_bytes = sizeof ((struct ib_sa_path_rec *) 0)->field, \
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.field_name = "sa_path_rec:" #field
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static const struct ib_field path_rec_table[] = {
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{ RESERVED,
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.offset_words = 0,
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.offset_bits = 0,
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.size_bits = 32 },
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{ RESERVED,
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.offset_words = 1,
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.offset_bits = 0,
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.size_bits = 32 },
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{ PATH_REC_FIELD(dgid),
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.offset_words = 2,
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.offset_bits = 0,
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.size_bits = 128 },
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{ PATH_REC_FIELD(sgid),
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.offset_words = 6,
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.offset_bits = 0,
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.size_bits = 128 },
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{ PATH_REC_FIELD(dlid),
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.offset_words = 10,
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.offset_bits = 0,
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.size_bits = 16 },
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{ PATH_REC_FIELD(slid),
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.offset_words = 10,
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.offset_bits = 16,
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.size_bits = 16 },
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{ PATH_REC_FIELD(raw_traffic),
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.offset_words = 11,
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.offset_bits = 0,
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.size_bits = 1 },
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{ RESERVED,
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.offset_words = 11,
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.offset_bits = 1,
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.size_bits = 3 },
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{ PATH_REC_FIELD(flow_label),
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.offset_words = 11,
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.offset_bits = 4,
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.size_bits = 20 },
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{ PATH_REC_FIELD(hop_limit),
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.offset_words = 11,
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.offset_bits = 24,
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.size_bits = 8 },
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{ PATH_REC_FIELD(traffic_class),
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.offset_words = 12,
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.offset_bits = 0,
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.size_bits = 8 },
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{ PATH_REC_FIELD(reversible),
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.offset_words = 12,
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.offset_bits = 8,
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.size_bits = 1 },
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{ PATH_REC_FIELD(numb_path),
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.offset_words = 12,
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.offset_bits = 9,
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.size_bits = 7 },
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{ PATH_REC_FIELD(pkey),
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.offset_words = 12,
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.offset_bits = 16,
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.size_bits = 16 },
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{ RESERVED,
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.offset_words = 13,
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.offset_bits = 0,
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.size_bits = 12 },
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{ PATH_REC_FIELD(sl),
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.offset_words = 13,
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.offset_bits = 12,
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.size_bits = 4 },
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{ PATH_REC_FIELD(mtu_selector),
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.offset_words = 13,
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.offset_bits = 16,
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.size_bits = 2 },
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{ PATH_REC_FIELD(mtu),
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.offset_words = 13,
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.offset_bits = 18,
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.size_bits = 6 },
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{ PATH_REC_FIELD(rate_selector),
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.offset_words = 13,
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.offset_bits = 24,
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.size_bits = 2 },
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{ PATH_REC_FIELD(rate),
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.offset_words = 13,
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.offset_bits = 26,
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.size_bits = 6 },
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{ PATH_REC_FIELD(packet_life_time_selector),
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.offset_words = 14,
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.offset_bits = 0,
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.size_bits = 2 },
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{ PATH_REC_FIELD(packet_life_time),
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.offset_words = 14,
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.offset_bits = 2,
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.size_bits = 6 },
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{ PATH_REC_FIELD(preference),
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.offset_words = 14,
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.offset_bits = 8,
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.size_bits = 8 },
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{ RESERVED,
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.offset_words = 14,
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.offset_bits = 16,
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.size_bits = 48 },
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};
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#define MCMEMBER_REC_FIELD(field) \
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.struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field), \
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.struct_size_bytes = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
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.field_name = "sa_mcmember_rec:" #field
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static const struct ib_field mcmember_rec_table[] = {
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{ MCMEMBER_REC_FIELD(mgid),
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.offset_words = 0,
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.offset_bits = 0,
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.size_bits = 128 },
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{ MCMEMBER_REC_FIELD(port_gid),
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.offset_words = 4,
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.offset_bits = 0,
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.size_bits = 128 },
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{ MCMEMBER_REC_FIELD(qkey),
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.offset_words = 8,
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.offset_bits = 0,
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.size_bits = 32 },
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{ MCMEMBER_REC_FIELD(mlid),
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.offset_words = 9,
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.offset_bits = 0,
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.size_bits = 16 },
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{ MCMEMBER_REC_FIELD(mtu_selector),
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.offset_words = 9,
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.offset_bits = 16,
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.size_bits = 2 },
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{ MCMEMBER_REC_FIELD(mtu),
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.offset_words = 9,
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.offset_bits = 18,
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.size_bits = 6 },
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{ MCMEMBER_REC_FIELD(traffic_class),
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.offset_words = 9,
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.offset_bits = 24,
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.size_bits = 8 },
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{ MCMEMBER_REC_FIELD(pkey),
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.offset_words = 10,
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.offset_bits = 0,
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.size_bits = 16 },
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{ MCMEMBER_REC_FIELD(rate_selector),
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.offset_words = 10,
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.offset_bits = 16,
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.size_bits = 2 },
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{ MCMEMBER_REC_FIELD(rate),
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.offset_words = 10,
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.offset_bits = 18,
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.size_bits = 6 },
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{ MCMEMBER_REC_FIELD(packet_life_time_selector),
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.offset_words = 10,
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.offset_bits = 24,
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.size_bits = 2 },
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{ MCMEMBER_REC_FIELD(packet_life_time),
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.offset_words = 10,
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.offset_bits = 26,
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.size_bits = 6 },
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{ MCMEMBER_REC_FIELD(sl),
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.offset_words = 11,
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.offset_bits = 0,
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.size_bits = 4 },
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{ MCMEMBER_REC_FIELD(flow_label),
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.offset_words = 11,
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.offset_bits = 4,
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.size_bits = 20 },
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{ MCMEMBER_REC_FIELD(hop_limit),
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.offset_words = 11,
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.offset_bits = 24,
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.size_bits = 8 },
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{ MCMEMBER_REC_FIELD(scope),
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.offset_words = 12,
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.offset_bits = 0,
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.size_bits = 4 },
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{ MCMEMBER_REC_FIELD(join_state),
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.offset_words = 12,
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.offset_bits = 4,
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.size_bits = 4 },
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{ MCMEMBER_REC_FIELD(proxy_join),
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.offset_words = 12,
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.offset_bits = 8,
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.size_bits = 1 },
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{ RESERVED,
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.offset_words = 12,
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.offset_bits = 9,
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.size_bits = 23 },
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};
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#define SERVICE_REC_FIELD(field) \
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.struct_offset_bytes = offsetof(struct ib_sa_service_rec, field), \
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.struct_size_bytes = sizeof ((struct ib_sa_service_rec *) 0)->field, \
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.field_name = "sa_service_rec:" #field
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static const struct ib_field service_rec_table[] = {
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{ SERVICE_REC_FIELD(id),
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.offset_words = 0,
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.offset_bits = 0,
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.size_bits = 64 },
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{ SERVICE_REC_FIELD(gid),
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.offset_words = 2,
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.offset_bits = 0,
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.size_bits = 128 },
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{ SERVICE_REC_FIELD(pkey),
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.offset_words = 6,
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.offset_bits = 0,
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.size_bits = 16 },
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{ SERVICE_REC_FIELD(lease),
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.offset_words = 7,
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.offset_bits = 0,
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.size_bits = 32 },
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{ SERVICE_REC_FIELD(key),
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.offset_words = 8,
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.offset_bits = 0,
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.size_bits = 128 },
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{ SERVICE_REC_FIELD(name),
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.offset_words = 12,
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.offset_bits = 0,
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.size_bits = 64*8 },
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{ SERVICE_REC_FIELD(data8),
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.offset_words = 28,
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.offset_bits = 0,
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.size_bits = 16*8 },
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{ SERVICE_REC_FIELD(data16),
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.offset_words = 32,
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.offset_bits = 0,
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.size_bits = 8*16 },
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{ SERVICE_REC_FIELD(data32),
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.offset_words = 36,
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.offset_bits = 0,
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.size_bits = 4*32 },
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{ SERVICE_REC_FIELD(data64),
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.offset_words = 40,
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.offset_bits = 0,
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.size_bits = 2*64 },
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};
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static void free_sm_ah(struct kref *kref)
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{
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struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
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ib_destroy_ah(sm_ah->ah);
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kfree(sm_ah);
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}
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static void update_sm_ah(void *port_ptr)
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{
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struct ib_sa_port *port = port_ptr;
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struct ib_sa_sm_ah *new_ah, *old_ah;
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struct ib_port_attr port_attr;
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struct ib_ah_attr ah_attr;
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if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
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printk(KERN_WARNING "Couldn't query port\n");
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return;
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}
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new_ah = kmalloc(sizeof *new_ah, GFP_KERNEL);
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if (!new_ah) {
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printk(KERN_WARNING "Couldn't allocate new SM AH\n");
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return;
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}
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kref_init(&new_ah->ref);
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memset(&ah_attr, 0, sizeof ah_attr);
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ah_attr.dlid = port_attr.sm_lid;
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ah_attr.sl = port_attr.sm_sl;
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ah_attr.port_num = port->port_num;
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new_ah->ah = ib_create_ah(port->agent->qp->pd, &ah_attr);
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if (IS_ERR(new_ah->ah)) {
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printk(KERN_WARNING "Couldn't create new SM AH\n");
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kfree(new_ah);
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return;
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}
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spin_lock_irq(&port->ah_lock);
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old_ah = port->sm_ah;
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port->sm_ah = new_ah;
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spin_unlock_irq(&port->ah_lock);
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if (old_ah)
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kref_put(&old_ah->ref, free_sm_ah);
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}
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static void ib_sa_event(struct ib_event_handler *handler, struct ib_event *event)
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{
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if (event->event == IB_EVENT_PORT_ERR ||
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event->event == IB_EVENT_PORT_ACTIVE ||
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event->event == IB_EVENT_LID_CHANGE ||
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event->event == IB_EVENT_PKEY_CHANGE ||
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event->event == IB_EVENT_SM_CHANGE) {
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struct ib_sa_device *sa_dev;
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sa_dev = container_of(handler, typeof(*sa_dev), event_handler);
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schedule_work(&sa_dev->port[event->element.port_num -
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sa_dev->start_port].update_task);
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}
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}
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/**
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* ib_sa_cancel_query - try to cancel an SA query
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* @id:ID of query to cancel
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* @query:query pointer to cancel
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*
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* Try to cancel an SA query. If the id and query don't match up or
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* the query has already completed, nothing is done. Otherwise the
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* query is canceled and will complete with a status of -EINTR.
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*/
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void ib_sa_cancel_query(int id, struct ib_sa_query *query)
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{
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unsigned long flags;
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struct ib_mad_agent *agent;
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spin_lock_irqsave(&idr_lock, flags);
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if (idr_find(&query_idr, id) != query) {
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spin_unlock_irqrestore(&idr_lock, flags);
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return;
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}
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agent = query->port->agent;
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spin_unlock_irqrestore(&idr_lock, flags);
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ib_cancel_mad(agent, id);
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}
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EXPORT_SYMBOL(ib_sa_cancel_query);
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static void init_mad(struct ib_sa_mad *mad, struct ib_mad_agent *agent)
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{
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unsigned long flags;
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memset(mad, 0, sizeof *mad);
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mad->mad_hdr.base_version = IB_MGMT_BASE_VERSION;
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mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_SUBN_ADM;
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mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
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spin_lock_irqsave(&tid_lock, flags);
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mad->mad_hdr.tid =
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cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
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spin_unlock_irqrestore(&tid_lock, flags);
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}
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static int send_mad(struct ib_sa_query *query, int timeout_ms)
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{
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struct ib_sa_port *port = query->port;
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unsigned long flags;
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int ret;
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struct ib_sge gather_list;
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struct ib_send_wr *bad_wr, wr = {
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.opcode = IB_WR_SEND,
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.sg_list = &gather_list,
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.num_sge = 1,
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.send_flags = IB_SEND_SIGNALED,
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.wr = {
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.ud = {
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.mad_hdr = &query->mad->mad_hdr,
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.remote_qpn = 1,
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.remote_qkey = IB_QP1_QKEY,
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.timeout_ms = timeout_ms,
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}
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}
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};
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retry:
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if (!idr_pre_get(&query_idr, GFP_ATOMIC))
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return -ENOMEM;
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spin_lock_irqsave(&idr_lock, flags);
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ret = idr_get_new(&query_idr, query, &query->id);
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spin_unlock_irqrestore(&idr_lock, flags);
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if (ret == -EAGAIN)
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goto retry;
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if (ret)
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return ret;
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wr.wr_id = query->id;
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spin_lock_irqsave(&port->ah_lock, flags);
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kref_get(&port->sm_ah->ref);
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query->sm_ah = port->sm_ah;
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wr.wr.ud.ah = port->sm_ah->ah;
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spin_unlock_irqrestore(&port->ah_lock, flags);
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gather_list.addr = dma_map_single(port->agent->device->dma_device,
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query->mad,
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sizeof (struct ib_sa_mad),
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DMA_TO_DEVICE);
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gather_list.length = sizeof (struct ib_sa_mad);
|
||
gather_list.lkey = port->agent->mr->lkey;
|
||
pci_unmap_addr_set(query, mapping, gather_list.addr);
|
||
|
||
ret = ib_post_send_mad(port->agent, &wr, &bad_wr);
|
||
if (ret) {
|
||
dma_unmap_single(port->agent->device->dma_device,
|
||
pci_unmap_addr(query, mapping),
|
||
sizeof (struct ib_sa_mad),
|
||
DMA_TO_DEVICE);
|
||
kref_put(&query->sm_ah->ref, free_sm_ah);
|
||
spin_lock_irqsave(&idr_lock, flags);
|
||
idr_remove(&query_idr, query->id);
|
||
spin_unlock_irqrestore(&idr_lock, flags);
|
||
}
|
||
|
||
/*
|
||
* It's not safe to dereference query any more, because the
|
||
* send may already have completed and freed the query in
|
||
* another context. So use wr.wr_id, which has a copy of the
|
||
* query's id.
|
||
*/
|
||
return ret ? ret : wr.wr_id;
|
||
}
|
||
|
||
static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
|
||
int status,
|
||
struct ib_sa_mad *mad)
|
||
{
|
||
struct ib_sa_path_query *query =
|
||
container_of(sa_query, struct ib_sa_path_query, sa_query);
|
||
|
||
if (mad) {
|
||
struct ib_sa_path_rec rec;
|
||
|
||
ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table),
|
||
mad->data, &rec);
|
||
query->callback(status, &rec, query->context);
|
||
} else
|
||
query->callback(status, NULL, query->context);
|
||
}
|
||
|
||
static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
|
||
{
|
||
kfree(sa_query->mad);
|
||
kfree(container_of(sa_query, struct ib_sa_path_query, sa_query));
|
||
}
|
||
|
||
/**
|
||
* ib_sa_path_rec_get - Start a Path get query
|
||
* @device:device to send query on
|
||
* @port_num: port number to send query on
|
||
* @rec:Path Record to send in query
|
||
* @comp_mask:component mask to send in query
|
||
* @timeout_ms:time to wait for response
|
||
* @gfp_mask:GFP mask to use for internal allocations
|
||
* @callback:function called when query completes, times out or is
|
||
* canceled
|
||
* @context:opaque user context passed to callback
|
||
* @sa_query:query context, used to cancel query
|
||
*
|
||
* Send a Path Record Get query to the SA to look up a path. The
|
||
* callback function will be called when the query completes (or
|
||
* fails); status is 0 for a successful response, -EINTR if the query
|
||
* is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
|
||
* occurred sending the query. The resp parameter of the callback is
|
||
* only valid if status is 0.
|
||
*
|
||
* If the return value of ib_sa_path_rec_get() is negative, it is an
|
||
* error code. Otherwise it is a query ID that can be used to cancel
|
||
* the query.
|
||
*/
|
||
int ib_sa_path_rec_get(struct ib_device *device, u8 port_num,
|
||
struct ib_sa_path_rec *rec,
|
||
ib_sa_comp_mask comp_mask,
|
||
int timeout_ms, gfp_t gfp_mask,
|
||
void (*callback)(int status,
|
||
struct ib_sa_path_rec *resp,
|
||
void *context),
|
||
void *context,
|
||
struct ib_sa_query **sa_query)
|
||
{
|
||
struct ib_sa_path_query *query;
|
||
struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
|
||
struct ib_sa_port *port;
|
||
struct ib_mad_agent *agent;
|
||
int ret;
|
||
|
||
if (!sa_dev)
|
||
return -ENODEV;
|
||
|
||
port = &sa_dev->port[port_num - sa_dev->start_port];
|
||
agent = port->agent;
|
||
|
||
query = kmalloc(sizeof *query, gfp_mask);
|
||
if (!query)
|
||
return -ENOMEM;
|
||
query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask);
|
||
if (!query->sa_query.mad) {
|
||
kfree(query);
|
||
return -ENOMEM;
|
||
}
|
||
|
||
query->callback = callback;
|
||
query->context = context;
|
||
|
||
init_mad(query->sa_query.mad, agent);
|
||
|
||
query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
|
||
query->sa_query.release = ib_sa_path_rec_release;
|
||
query->sa_query.port = port;
|
||
query->sa_query.mad->mad_hdr.method = IB_MGMT_METHOD_GET;
|
||
query->sa_query.mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_PATH_REC);
|
||
query->sa_query.mad->sa_hdr.comp_mask = comp_mask;
|
||
|
||
ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
|
||
rec, query->sa_query.mad->data);
|
||
|
||
*sa_query = &query->sa_query;
|
||
|
||
ret = send_mad(&query->sa_query, timeout_ms);
|
||
if (ret < 0) {
|
||
*sa_query = NULL;
|
||
kfree(query->sa_query.mad);
|
||
kfree(query);
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
EXPORT_SYMBOL(ib_sa_path_rec_get);
|
||
|
||
static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
|
||
int status,
|
||
struct ib_sa_mad *mad)
|
||
{
|
||
struct ib_sa_service_query *query =
|
||
container_of(sa_query, struct ib_sa_service_query, sa_query);
|
||
|
||
if (mad) {
|
||
struct ib_sa_service_rec rec;
|
||
|
||
ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
|
||
mad->data, &rec);
|
||
query->callback(status, &rec, query->context);
|
||
} else
|
||
query->callback(status, NULL, query->context);
|
||
}
|
||
|
||
static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
|
||
{
|
||
kfree(sa_query->mad);
|
||
kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
|
||
}
|
||
|
||
/**
|
||
* ib_sa_service_rec_query - Start Service Record operation
|
||
* @device:device to send request on
|
||
* @port_num: port number to send request on
|
||
* @method:SA method - should be get, set, or delete
|
||
* @rec:Service Record to send in request
|
||
* @comp_mask:component mask to send in request
|
||
* @timeout_ms:time to wait for response
|
||
* @gfp_mask:GFP mask to use for internal allocations
|
||
* @callback:function called when request completes, times out or is
|
||
* canceled
|
||
* @context:opaque user context passed to callback
|
||
* @sa_query:request context, used to cancel request
|
||
*
|
||
* Send a Service Record set/get/delete to the SA to register,
|
||
* unregister or query a service record.
|
||
* The callback function will be called when the request completes (or
|
||
* fails); status is 0 for a successful response, -EINTR if the query
|
||
* is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
|
||
* occurred sending the query. The resp parameter of the callback is
|
||
* only valid if status is 0.
|
||
*
|
||
* If the return value of ib_sa_service_rec_query() is negative, it is an
|
||
* error code. Otherwise it is a request ID that can be used to cancel
|
||
* the query.
|
||
*/
|
||
int ib_sa_service_rec_query(struct ib_device *device, u8 port_num, u8 method,
|
||
struct ib_sa_service_rec *rec,
|
||
ib_sa_comp_mask comp_mask,
|
||
int timeout_ms, gfp_t gfp_mask,
|
||
void (*callback)(int status,
|
||
struct ib_sa_service_rec *resp,
|
||
void *context),
|
||
void *context,
|
||
struct ib_sa_query **sa_query)
|
||
{
|
||
struct ib_sa_service_query *query;
|
||
struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
|
||
struct ib_sa_port *port;
|
||
struct ib_mad_agent *agent;
|
||
int ret;
|
||
|
||
if (!sa_dev)
|
||
return -ENODEV;
|
||
|
||
port = &sa_dev->port[port_num - sa_dev->start_port];
|
||
agent = port->agent;
|
||
|
||
if (method != IB_MGMT_METHOD_GET &&
|
||
method != IB_MGMT_METHOD_SET &&
|
||
method != IB_SA_METHOD_DELETE)
|
||
return -EINVAL;
|
||
|
||
query = kmalloc(sizeof *query, gfp_mask);
|
||
if (!query)
|
||
return -ENOMEM;
|
||
query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask);
|
||
if (!query->sa_query.mad) {
|
||
kfree(query);
|
||
return -ENOMEM;
|
||
}
|
||
|
||
query->callback = callback;
|
||
query->context = context;
|
||
|
||
init_mad(query->sa_query.mad, agent);
|
||
|
||
query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
|
||
query->sa_query.release = ib_sa_service_rec_release;
|
||
query->sa_query.port = port;
|
||
query->sa_query.mad->mad_hdr.method = method;
|
||
query->sa_query.mad->mad_hdr.attr_id =
|
||
cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
|
||
query->sa_query.mad->sa_hdr.comp_mask = comp_mask;
|
||
|
||
ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
|
||
rec, query->sa_query.mad->data);
|
||
|
||
*sa_query = &query->sa_query;
|
||
|
||
ret = send_mad(&query->sa_query, timeout_ms);
|
||
if (ret < 0) {
|
||
*sa_query = NULL;
|
||
kfree(query->sa_query.mad);
|
||
kfree(query);
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
EXPORT_SYMBOL(ib_sa_service_rec_query);
|
||
|
||
static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
|
||
int status,
|
||
struct ib_sa_mad *mad)
|
||
{
|
||
struct ib_sa_mcmember_query *query =
|
||
container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
|
||
|
||
if (mad) {
|
||
struct ib_sa_mcmember_rec rec;
|
||
|
||
ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
|
||
mad->data, &rec);
|
||
query->callback(status, &rec, query->context);
|
||
} else
|
||
query->callback(status, NULL, query->context);
|
||
}
|
||
|
||
static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
|
||
{
|
||
kfree(sa_query->mad);
|
||
kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
|
||
}
|
||
|
||
int ib_sa_mcmember_rec_query(struct ib_device *device, u8 port_num,
|
||
u8 method,
|
||
struct ib_sa_mcmember_rec *rec,
|
||
ib_sa_comp_mask comp_mask,
|
||
int timeout_ms, gfp_t gfp_mask,
|
||
void (*callback)(int status,
|
||
struct ib_sa_mcmember_rec *resp,
|
||
void *context),
|
||
void *context,
|
||
struct ib_sa_query **sa_query)
|
||
{
|
||
struct ib_sa_mcmember_query *query;
|
||
struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
|
||
struct ib_sa_port *port;
|
||
struct ib_mad_agent *agent;
|
||
int ret;
|
||
|
||
if (!sa_dev)
|
||
return -ENODEV;
|
||
|
||
port = &sa_dev->port[port_num - sa_dev->start_port];
|
||
agent = port->agent;
|
||
|
||
query = kmalloc(sizeof *query, gfp_mask);
|
||
if (!query)
|
||
return -ENOMEM;
|
||
query->sa_query.mad = kmalloc(sizeof *query->sa_query.mad, gfp_mask);
|
||
if (!query->sa_query.mad) {
|
||
kfree(query);
|
||
return -ENOMEM;
|
||
}
|
||
|
||
query->callback = callback;
|
||
query->context = context;
|
||
|
||
init_mad(query->sa_query.mad, agent);
|
||
|
||
query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
|
||
query->sa_query.release = ib_sa_mcmember_rec_release;
|
||
query->sa_query.port = port;
|
||
query->sa_query.mad->mad_hdr.method = method;
|
||
query->sa_query.mad->mad_hdr.attr_id = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
|
||
query->sa_query.mad->sa_hdr.comp_mask = comp_mask;
|
||
|
||
ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
|
||
rec, query->sa_query.mad->data);
|
||
|
||
*sa_query = &query->sa_query;
|
||
|
||
ret = send_mad(&query->sa_query, timeout_ms);
|
||
if (ret < 0) {
|
||
*sa_query = NULL;
|
||
kfree(query->sa_query.mad);
|
||
kfree(query);
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
EXPORT_SYMBOL(ib_sa_mcmember_rec_query);
|
||
|
||
static void send_handler(struct ib_mad_agent *agent,
|
||
struct ib_mad_send_wc *mad_send_wc)
|
||
{
|
||
struct ib_sa_query *query;
|
||
unsigned long flags;
|
||
|
||
spin_lock_irqsave(&idr_lock, flags);
|
||
query = idr_find(&query_idr, mad_send_wc->wr_id);
|
||
spin_unlock_irqrestore(&idr_lock, flags);
|
||
|
||
if (!query)
|
||
return;
|
||
|
||
if (query->callback)
|
||
switch (mad_send_wc->status) {
|
||
case IB_WC_SUCCESS:
|
||
/* No callback -- already got recv */
|
||
break;
|
||
case IB_WC_RESP_TIMEOUT_ERR:
|
||
query->callback(query, -ETIMEDOUT, NULL);
|
||
break;
|
||
case IB_WC_WR_FLUSH_ERR:
|
||
query->callback(query, -EINTR, NULL);
|
||
break;
|
||
default:
|
||
query->callback(query, -EIO, NULL);
|
||
break;
|
||
}
|
||
|
||
dma_unmap_single(agent->device->dma_device,
|
||
pci_unmap_addr(query, mapping),
|
||
sizeof (struct ib_sa_mad),
|
||
DMA_TO_DEVICE);
|
||
kref_put(&query->sm_ah->ref, free_sm_ah);
|
||
|
||
query->release(query);
|
||
|
||
spin_lock_irqsave(&idr_lock, flags);
|
||
idr_remove(&query_idr, mad_send_wc->wr_id);
|
||
spin_unlock_irqrestore(&idr_lock, flags);
|
||
}
|
||
|
||
static void recv_handler(struct ib_mad_agent *mad_agent,
|
||
struct ib_mad_recv_wc *mad_recv_wc)
|
||
{
|
||
struct ib_sa_query *query;
|
||
unsigned long flags;
|
||
|
||
spin_lock_irqsave(&idr_lock, flags);
|
||
query = idr_find(&query_idr, mad_recv_wc->wc->wr_id);
|
||
spin_unlock_irqrestore(&idr_lock, flags);
|
||
|
||
if (query && query->callback) {
|
||
if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
|
||
query->callback(query,
|
||
mad_recv_wc->recv_buf.mad->mad_hdr.status ?
|
||
-EINVAL : 0,
|
||
(struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
|
||
else
|
||
query->callback(query, -EIO, NULL);
|
||
}
|
||
|
||
ib_free_recv_mad(mad_recv_wc);
|
||
}
|
||
|
||
static void ib_sa_add_one(struct ib_device *device)
|
||
{
|
||
struct ib_sa_device *sa_dev;
|
||
int s, e, i;
|
||
|
||
if (device->node_type == IB_NODE_SWITCH)
|
||
s = e = 0;
|
||
else {
|
||
s = 1;
|
||
e = device->phys_port_cnt;
|
||
}
|
||
|
||
sa_dev = kmalloc(sizeof *sa_dev +
|
||
(e - s + 1) * sizeof (struct ib_sa_port),
|
||
GFP_KERNEL);
|
||
if (!sa_dev)
|
||
return;
|
||
|
||
sa_dev->start_port = s;
|
||
sa_dev->end_port = e;
|
||
|
||
for (i = 0; i <= e - s; ++i) {
|
||
sa_dev->port[i].sm_ah = NULL;
|
||
sa_dev->port[i].port_num = i + s;
|
||
spin_lock_init(&sa_dev->port[i].ah_lock);
|
||
|
||
sa_dev->port[i].agent =
|
||
ib_register_mad_agent(device, i + s, IB_QPT_GSI,
|
||
NULL, 0, send_handler,
|
||
recv_handler, sa_dev);
|
||
if (IS_ERR(sa_dev->port[i].agent))
|
||
goto err;
|
||
|
||
INIT_WORK(&sa_dev->port[i].update_task,
|
||
update_sm_ah, &sa_dev->port[i]);
|
||
}
|
||
|
||
ib_set_client_data(device, &sa_client, sa_dev);
|
||
|
||
/*
|
||
* We register our event handler after everything is set up,
|
||
* and then update our cached info after the event handler is
|
||
* registered to avoid any problems if a port changes state
|
||
* during our initialization.
|
||
*/
|
||
|
||
INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
|
||
if (ib_register_event_handler(&sa_dev->event_handler))
|
||
goto err;
|
||
|
||
for (i = 0; i <= e - s; ++i)
|
||
update_sm_ah(&sa_dev->port[i]);
|
||
|
||
return;
|
||
|
||
err:
|
||
while (--i >= 0)
|
||
ib_unregister_mad_agent(sa_dev->port[i].agent);
|
||
|
||
kfree(sa_dev);
|
||
|
||
return;
|
||
}
|
||
|
||
static void ib_sa_remove_one(struct ib_device *device)
|
||
{
|
||
struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
|
||
int i;
|
||
|
||
if (!sa_dev)
|
||
return;
|
||
|
||
ib_unregister_event_handler(&sa_dev->event_handler);
|
||
|
||
for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
|
||
ib_unregister_mad_agent(sa_dev->port[i].agent);
|
||
kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
|
||
}
|
||
|
||
kfree(sa_dev);
|
||
}
|
||
|
||
static int __init ib_sa_init(void)
|
||
{
|
||
int ret;
|
||
|
||
spin_lock_init(&idr_lock);
|
||
spin_lock_init(&tid_lock);
|
||
|
||
get_random_bytes(&tid, sizeof tid);
|
||
|
||
ret = ib_register_client(&sa_client);
|
||
if (ret)
|
||
printk(KERN_ERR "Couldn't register ib_sa client\n");
|
||
|
||
return ret;
|
||
}
|
||
|
||
static void __exit ib_sa_cleanup(void)
|
||
{
|
||
ib_unregister_client(&sa_client);
|
||
}
|
||
|
||
module_init(ib_sa_init);
|
||
module_exit(ib_sa_cleanup);
|