907 lines
24 KiB
C
907 lines
24 KiB
C
/*
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* Copyright (c) 2006 Intel Corporation. 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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#include <linux/completion.h>
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#include <linux/dma-mapping.h>
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#include <linux/err.h>
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#include <linux/interrupt.h>
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#include <linux/export.h>
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#include <linux/slab.h>
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#include <linux/bitops.h>
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#include <linux/random.h>
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#include <rdma/ib_cache.h>
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#include "sa.h"
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static int mcast_add_one(struct ib_device *device);
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static void mcast_remove_one(struct ib_device *device, void *client_data);
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static struct ib_client mcast_client = {
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.name = "ib_multicast",
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.add = mcast_add_one,
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.remove = mcast_remove_one
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};
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static struct ib_sa_client sa_client;
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static struct workqueue_struct *mcast_wq;
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static union ib_gid mgid0;
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struct mcast_device;
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struct mcast_port {
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struct mcast_device *dev;
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spinlock_t lock;
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struct rb_root table;
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refcount_t refcount;
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struct completion comp;
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u32 port_num;
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};
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struct mcast_device {
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struct ib_device *device;
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struct ib_event_handler event_handler;
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int start_port;
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int end_port;
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struct mcast_port port[];
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};
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enum mcast_state {
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MCAST_JOINING,
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MCAST_MEMBER,
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MCAST_ERROR,
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};
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enum mcast_group_state {
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MCAST_IDLE,
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MCAST_BUSY,
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MCAST_GROUP_ERROR,
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MCAST_PKEY_EVENT
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};
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enum {
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MCAST_INVALID_PKEY_INDEX = 0xFFFF
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};
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struct mcast_member;
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struct mcast_group {
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struct ib_sa_mcmember_rec rec;
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struct rb_node node;
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struct mcast_port *port;
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spinlock_t lock;
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struct work_struct work;
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struct list_head pending_list;
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struct list_head active_list;
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struct mcast_member *last_join;
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int members[NUM_JOIN_MEMBERSHIP_TYPES];
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atomic_t refcount;
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enum mcast_group_state state;
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struct ib_sa_query *query;
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u16 pkey_index;
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u8 leave_state;
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int retries;
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};
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struct mcast_member {
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struct ib_sa_multicast multicast;
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struct ib_sa_client *client;
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struct mcast_group *group;
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struct list_head list;
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enum mcast_state state;
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refcount_t refcount;
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struct completion comp;
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};
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static void join_handler(int status, struct ib_sa_mcmember_rec *rec,
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void *context);
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static void leave_handler(int status, struct ib_sa_mcmember_rec *rec,
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void *context);
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static struct mcast_group *mcast_find(struct mcast_port *port,
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union ib_gid *mgid)
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{
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struct rb_node *node = port->table.rb_node;
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struct mcast_group *group;
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int ret;
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while (node) {
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group = rb_entry(node, struct mcast_group, node);
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ret = memcmp(mgid->raw, group->rec.mgid.raw, sizeof *mgid);
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if (!ret)
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return group;
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if (ret < 0)
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node = node->rb_left;
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else
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node = node->rb_right;
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}
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return NULL;
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}
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static struct mcast_group *mcast_insert(struct mcast_port *port,
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struct mcast_group *group,
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int allow_duplicates)
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{
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struct rb_node **link = &port->table.rb_node;
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struct rb_node *parent = NULL;
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struct mcast_group *cur_group;
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int ret;
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while (*link) {
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parent = *link;
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cur_group = rb_entry(parent, struct mcast_group, node);
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ret = memcmp(group->rec.mgid.raw, cur_group->rec.mgid.raw,
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sizeof group->rec.mgid);
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if (ret < 0)
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link = &(*link)->rb_left;
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else if (ret > 0)
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link = &(*link)->rb_right;
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else if (allow_duplicates)
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link = &(*link)->rb_left;
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else
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return cur_group;
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}
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rb_link_node(&group->node, parent, link);
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rb_insert_color(&group->node, &port->table);
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return NULL;
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}
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static void deref_port(struct mcast_port *port)
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{
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if (refcount_dec_and_test(&port->refcount))
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complete(&port->comp);
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}
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static void release_group(struct mcast_group *group)
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{
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struct mcast_port *port = group->port;
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unsigned long flags;
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spin_lock_irqsave(&port->lock, flags);
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if (atomic_dec_and_test(&group->refcount)) {
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rb_erase(&group->node, &port->table);
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spin_unlock_irqrestore(&port->lock, flags);
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kfree(group);
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deref_port(port);
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} else
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spin_unlock_irqrestore(&port->lock, flags);
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}
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static void deref_member(struct mcast_member *member)
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{
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if (refcount_dec_and_test(&member->refcount))
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complete(&member->comp);
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}
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static void queue_join(struct mcast_member *member)
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{
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struct mcast_group *group = member->group;
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unsigned long flags;
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spin_lock_irqsave(&group->lock, flags);
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list_add_tail(&member->list, &group->pending_list);
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if (group->state == MCAST_IDLE) {
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group->state = MCAST_BUSY;
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atomic_inc(&group->refcount);
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queue_work(mcast_wq, &group->work);
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}
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spin_unlock_irqrestore(&group->lock, flags);
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}
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/*
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* A multicast group has four types of members: full member, non member,
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* sendonly non member and sendonly full member.
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* We need to keep track of the number of members of each
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* type based on their join state. Adjust the number of members the belong to
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* the specified join states.
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*/
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static void adjust_membership(struct mcast_group *group, u8 join_state, int inc)
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{
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int i;
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for (i = 0; i < NUM_JOIN_MEMBERSHIP_TYPES; i++, join_state >>= 1)
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if (join_state & 0x1)
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group->members[i] += inc;
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}
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/*
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* If a multicast group has zero members left for a particular join state, but
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* the group is still a member with the SA, we need to leave that join state.
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* Determine which join states we still belong to, but that do not have any
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* active members.
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*/
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static u8 get_leave_state(struct mcast_group *group)
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{
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u8 leave_state = 0;
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int i;
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for (i = 0; i < NUM_JOIN_MEMBERSHIP_TYPES; i++)
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if (!group->members[i])
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leave_state |= (0x1 << i);
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return leave_state & group->rec.join_state;
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}
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static int check_selector(ib_sa_comp_mask comp_mask,
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ib_sa_comp_mask selector_mask,
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ib_sa_comp_mask value_mask,
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u8 selector, u8 src_value, u8 dst_value)
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{
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int err;
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if (!(comp_mask & selector_mask) || !(comp_mask & value_mask))
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return 0;
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switch (selector) {
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case IB_SA_GT:
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err = (src_value <= dst_value);
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break;
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case IB_SA_LT:
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err = (src_value >= dst_value);
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break;
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case IB_SA_EQ:
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err = (src_value != dst_value);
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break;
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default:
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err = 0;
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break;
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}
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return err;
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}
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static int cmp_rec(struct ib_sa_mcmember_rec *src,
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struct ib_sa_mcmember_rec *dst, ib_sa_comp_mask comp_mask)
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{
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/* MGID must already match */
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if (comp_mask & IB_SA_MCMEMBER_REC_PORT_GID &&
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memcmp(&src->port_gid, &dst->port_gid, sizeof src->port_gid))
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return -EINVAL;
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if (comp_mask & IB_SA_MCMEMBER_REC_QKEY && src->qkey != dst->qkey)
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return -EINVAL;
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if (comp_mask & IB_SA_MCMEMBER_REC_MLID && src->mlid != dst->mlid)
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return -EINVAL;
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if (check_selector(comp_mask, IB_SA_MCMEMBER_REC_MTU_SELECTOR,
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IB_SA_MCMEMBER_REC_MTU, dst->mtu_selector,
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src->mtu, dst->mtu))
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return -EINVAL;
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if (comp_mask & IB_SA_MCMEMBER_REC_TRAFFIC_CLASS &&
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src->traffic_class != dst->traffic_class)
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return -EINVAL;
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if (comp_mask & IB_SA_MCMEMBER_REC_PKEY && src->pkey != dst->pkey)
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return -EINVAL;
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if (check_selector(comp_mask, IB_SA_MCMEMBER_REC_RATE_SELECTOR,
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IB_SA_MCMEMBER_REC_RATE, dst->rate_selector,
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src->rate, dst->rate))
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return -EINVAL;
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if (check_selector(comp_mask,
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IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME_SELECTOR,
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IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME,
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dst->packet_life_time_selector,
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src->packet_life_time, dst->packet_life_time))
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return -EINVAL;
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if (comp_mask & IB_SA_MCMEMBER_REC_SL && src->sl != dst->sl)
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return -EINVAL;
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if (comp_mask & IB_SA_MCMEMBER_REC_FLOW_LABEL &&
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src->flow_label != dst->flow_label)
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return -EINVAL;
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if (comp_mask & IB_SA_MCMEMBER_REC_HOP_LIMIT &&
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src->hop_limit != dst->hop_limit)
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return -EINVAL;
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if (comp_mask & IB_SA_MCMEMBER_REC_SCOPE && src->scope != dst->scope)
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return -EINVAL;
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/* join_state checked separately, proxy_join ignored */
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return 0;
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}
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static int send_join(struct mcast_group *group, struct mcast_member *member)
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{
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struct mcast_port *port = group->port;
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int ret;
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group->last_join = member;
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ret = ib_sa_mcmember_rec_query(&sa_client, port->dev->device,
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port->port_num, IB_MGMT_METHOD_SET,
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&member->multicast.rec,
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member->multicast.comp_mask,
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3000, GFP_KERNEL, join_handler, group,
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&group->query);
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return (ret > 0) ? 0 : ret;
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}
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static int send_leave(struct mcast_group *group, u8 leave_state)
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{
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struct mcast_port *port = group->port;
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struct ib_sa_mcmember_rec rec;
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int ret;
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rec = group->rec;
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rec.join_state = leave_state;
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group->leave_state = leave_state;
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ret = ib_sa_mcmember_rec_query(&sa_client, port->dev->device,
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port->port_num, IB_SA_METHOD_DELETE, &rec,
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IB_SA_MCMEMBER_REC_MGID |
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IB_SA_MCMEMBER_REC_PORT_GID |
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IB_SA_MCMEMBER_REC_JOIN_STATE,
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3000, GFP_KERNEL, leave_handler,
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group, &group->query);
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return (ret > 0) ? 0 : ret;
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}
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static void join_group(struct mcast_group *group, struct mcast_member *member,
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u8 join_state)
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{
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member->state = MCAST_MEMBER;
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adjust_membership(group, join_state, 1);
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group->rec.join_state |= join_state;
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member->multicast.rec = group->rec;
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member->multicast.rec.join_state = join_state;
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list_move(&member->list, &group->active_list);
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}
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static int fail_join(struct mcast_group *group, struct mcast_member *member,
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int status)
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{
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spin_lock_irq(&group->lock);
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list_del_init(&member->list);
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spin_unlock_irq(&group->lock);
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return member->multicast.callback(status, &member->multicast);
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}
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static void process_group_error(struct mcast_group *group)
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{
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struct mcast_member *member;
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int ret = 0;
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u16 pkey_index;
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if (group->state == MCAST_PKEY_EVENT)
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ret = ib_find_pkey(group->port->dev->device,
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group->port->port_num,
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be16_to_cpu(group->rec.pkey), &pkey_index);
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spin_lock_irq(&group->lock);
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if (group->state == MCAST_PKEY_EVENT && !ret &&
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group->pkey_index == pkey_index)
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goto out;
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while (!list_empty(&group->active_list)) {
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member = list_entry(group->active_list.next,
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struct mcast_member, list);
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refcount_inc(&member->refcount);
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list_del_init(&member->list);
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adjust_membership(group, member->multicast.rec.join_state, -1);
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member->state = MCAST_ERROR;
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spin_unlock_irq(&group->lock);
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ret = member->multicast.callback(-ENETRESET,
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&member->multicast);
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deref_member(member);
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if (ret)
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ib_sa_free_multicast(&member->multicast);
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spin_lock_irq(&group->lock);
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}
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group->rec.join_state = 0;
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out:
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group->state = MCAST_BUSY;
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spin_unlock_irq(&group->lock);
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}
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static void mcast_work_handler(struct work_struct *work)
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{
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struct mcast_group *group;
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struct mcast_member *member;
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struct ib_sa_multicast *multicast;
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int status, ret;
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u8 join_state;
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group = container_of(work, typeof(*group), work);
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retest:
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spin_lock_irq(&group->lock);
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while (!list_empty(&group->pending_list) ||
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(group->state != MCAST_BUSY)) {
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if (group->state != MCAST_BUSY) {
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spin_unlock_irq(&group->lock);
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process_group_error(group);
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goto retest;
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}
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member = list_entry(group->pending_list.next,
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struct mcast_member, list);
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multicast = &member->multicast;
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join_state = multicast->rec.join_state;
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refcount_inc(&member->refcount);
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if (join_state == (group->rec.join_state & join_state)) {
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status = cmp_rec(&group->rec, &multicast->rec,
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multicast->comp_mask);
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if (!status)
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join_group(group, member, join_state);
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else
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list_del_init(&member->list);
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spin_unlock_irq(&group->lock);
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ret = multicast->callback(status, multicast);
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} else {
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spin_unlock_irq(&group->lock);
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status = send_join(group, member);
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if (!status) {
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deref_member(member);
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return;
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}
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ret = fail_join(group, member, status);
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}
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deref_member(member);
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if (ret)
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ib_sa_free_multicast(&member->multicast);
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spin_lock_irq(&group->lock);
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}
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join_state = get_leave_state(group);
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if (join_state) {
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group->rec.join_state &= ~join_state;
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spin_unlock_irq(&group->lock);
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if (send_leave(group, join_state))
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goto retest;
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} else {
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group->state = MCAST_IDLE;
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spin_unlock_irq(&group->lock);
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release_group(group);
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}
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}
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/*
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* Fail a join request if it is still active - at the head of the pending queue.
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*/
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static void process_join_error(struct mcast_group *group, int status)
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{
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struct mcast_member *member;
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int ret;
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spin_lock_irq(&group->lock);
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member = list_entry(group->pending_list.next,
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struct mcast_member, list);
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if (group->last_join == member) {
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refcount_inc(&member->refcount);
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list_del_init(&member->list);
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spin_unlock_irq(&group->lock);
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ret = member->multicast.callback(status, &member->multicast);
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deref_member(member);
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if (ret)
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ib_sa_free_multicast(&member->multicast);
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} else
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spin_unlock_irq(&group->lock);
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}
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static void join_handler(int status, struct ib_sa_mcmember_rec *rec,
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void *context)
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{
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struct mcast_group *group = context;
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u16 pkey_index = MCAST_INVALID_PKEY_INDEX;
|
|
|
|
if (status)
|
|
process_join_error(group, status);
|
|
else {
|
|
int mgids_changed, is_mgid0;
|
|
|
|
if (ib_find_pkey(group->port->dev->device,
|
|
group->port->port_num, be16_to_cpu(rec->pkey),
|
|
&pkey_index))
|
|
pkey_index = MCAST_INVALID_PKEY_INDEX;
|
|
|
|
spin_lock_irq(&group->port->lock);
|
|
if (group->state == MCAST_BUSY &&
|
|
group->pkey_index == MCAST_INVALID_PKEY_INDEX)
|
|
group->pkey_index = pkey_index;
|
|
mgids_changed = memcmp(&rec->mgid, &group->rec.mgid,
|
|
sizeof(group->rec.mgid));
|
|
group->rec = *rec;
|
|
if (mgids_changed) {
|
|
rb_erase(&group->node, &group->port->table);
|
|
is_mgid0 = !memcmp(&mgid0, &group->rec.mgid,
|
|
sizeof(mgid0));
|
|
mcast_insert(group->port, group, is_mgid0);
|
|
}
|
|
spin_unlock_irq(&group->port->lock);
|
|
}
|
|
mcast_work_handler(&group->work);
|
|
}
|
|
|
|
static void leave_handler(int status, struct ib_sa_mcmember_rec *rec,
|
|
void *context)
|
|
{
|
|
struct mcast_group *group = context;
|
|
|
|
if (status && group->retries > 0 &&
|
|
!send_leave(group, group->leave_state))
|
|
group->retries--;
|
|
else
|
|
mcast_work_handler(&group->work);
|
|
}
|
|
|
|
static struct mcast_group *acquire_group(struct mcast_port *port,
|
|
union ib_gid *mgid, gfp_t gfp_mask)
|
|
{
|
|
struct mcast_group *group, *cur_group;
|
|
unsigned long flags;
|
|
int is_mgid0;
|
|
|
|
is_mgid0 = !memcmp(&mgid0, mgid, sizeof mgid0);
|
|
if (!is_mgid0) {
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
group = mcast_find(port, mgid);
|
|
if (group)
|
|
goto found;
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
}
|
|
|
|
group = kzalloc(sizeof *group, gfp_mask);
|
|
if (!group)
|
|
return NULL;
|
|
|
|
group->retries = 3;
|
|
group->port = port;
|
|
group->rec.mgid = *mgid;
|
|
group->pkey_index = MCAST_INVALID_PKEY_INDEX;
|
|
INIT_LIST_HEAD(&group->pending_list);
|
|
INIT_LIST_HEAD(&group->active_list);
|
|
INIT_WORK(&group->work, mcast_work_handler);
|
|
spin_lock_init(&group->lock);
|
|
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
cur_group = mcast_insert(port, group, is_mgid0);
|
|
if (cur_group) {
|
|
kfree(group);
|
|
group = cur_group;
|
|
} else
|
|
refcount_inc(&port->refcount);
|
|
found:
|
|
atomic_inc(&group->refcount);
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
return group;
|
|
}
|
|
|
|
/*
|
|
* We serialize all join requests to a single group to make our lives much
|
|
* easier. Otherwise, two users could try to join the same group
|
|
* simultaneously, with different configurations, one could leave while the
|
|
* join is in progress, etc., which makes locking around error recovery
|
|
* difficult.
|
|
*/
|
|
struct ib_sa_multicast *
|
|
ib_sa_join_multicast(struct ib_sa_client *client,
|
|
struct ib_device *device, u32 port_num,
|
|
struct ib_sa_mcmember_rec *rec,
|
|
ib_sa_comp_mask comp_mask, gfp_t gfp_mask,
|
|
int (*callback)(int status,
|
|
struct ib_sa_multicast *multicast),
|
|
void *context)
|
|
{
|
|
struct mcast_device *dev;
|
|
struct mcast_member *member;
|
|
struct ib_sa_multicast *multicast;
|
|
int ret;
|
|
|
|
dev = ib_get_client_data(device, &mcast_client);
|
|
if (!dev)
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
member = kmalloc(sizeof *member, gfp_mask);
|
|
if (!member)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
ib_sa_client_get(client);
|
|
member->client = client;
|
|
member->multicast.rec = *rec;
|
|
member->multicast.comp_mask = comp_mask;
|
|
member->multicast.callback = callback;
|
|
member->multicast.context = context;
|
|
init_completion(&member->comp);
|
|
refcount_set(&member->refcount, 1);
|
|
member->state = MCAST_JOINING;
|
|
|
|
member->group = acquire_group(&dev->port[port_num - dev->start_port],
|
|
&rec->mgid, gfp_mask);
|
|
if (!member->group) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* The user will get the multicast structure in their callback. They
|
|
* could then free the multicast structure before we can return from
|
|
* this routine. So we save the pointer to return before queuing
|
|
* any callback.
|
|
*/
|
|
multicast = &member->multicast;
|
|
queue_join(member);
|
|
return multicast;
|
|
|
|
err:
|
|
ib_sa_client_put(client);
|
|
kfree(member);
|
|
return ERR_PTR(ret);
|
|
}
|
|
EXPORT_SYMBOL(ib_sa_join_multicast);
|
|
|
|
void ib_sa_free_multicast(struct ib_sa_multicast *multicast)
|
|
{
|
|
struct mcast_member *member;
|
|
struct mcast_group *group;
|
|
|
|
member = container_of(multicast, struct mcast_member, multicast);
|
|
group = member->group;
|
|
|
|
spin_lock_irq(&group->lock);
|
|
if (member->state == MCAST_MEMBER)
|
|
adjust_membership(group, multicast->rec.join_state, -1);
|
|
|
|
list_del_init(&member->list);
|
|
|
|
if (group->state == MCAST_IDLE) {
|
|
group->state = MCAST_BUSY;
|
|
spin_unlock_irq(&group->lock);
|
|
/* Continue to hold reference on group until callback */
|
|
queue_work(mcast_wq, &group->work);
|
|
} else {
|
|
spin_unlock_irq(&group->lock);
|
|
release_group(group);
|
|
}
|
|
|
|
deref_member(member);
|
|
wait_for_completion(&member->comp);
|
|
ib_sa_client_put(member->client);
|
|
kfree(member);
|
|
}
|
|
EXPORT_SYMBOL(ib_sa_free_multicast);
|
|
|
|
int ib_sa_get_mcmember_rec(struct ib_device *device, u32 port_num,
|
|
union ib_gid *mgid, struct ib_sa_mcmember_rec *rec)
|
|
{
|
|
struct mcast_device *dev;
|
|
struct mcast_port *port;
|
|
struct mcast_group *group;
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
dev = ib_get_client_data(device, &mcast_client);
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
port = &dev->port[port_num - dev->start_port];
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
group = mcast_find(port, mgid);
|
|
if (group)
|
|
*rec = group->rec;
|
|
else
|
|
ret = -EADDRNOTAVAIL;
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_sa_get_mcmember_rec);
|
|
|
|
/**
|
|
* ib_init_ah_from_mcmember - Initialize AH attribute from multicast
|
|
* member record and gid of the device.
|
|
* @device: RDMA device
|
|
* @port_num: Port of the rdma device to consider
|
|
* @rec: Multicast member record to use
|
|
* @ndev: Optional netdevice, applicable only for RoCE
|
|
* @gid_type: GID type to consider
|
|
* @ah_attr: AH attribute to fillup on successful completion
|
|
*
|
|
* ib_init_ah_from_mcmember() initializes AH attribute based on multicast
|
|
* member record and other device properties. On success the caller is
|
|
* responsible to call rdma_destroy_ah_attr on the ah_attr. Returns 0 on
|
|
* success or appropriate error code.
|
|
*
|
|
*/
|
|
int ib_init_ah_from_mcmember(struct ib_device *device, u32 port_num,
|
|
struct ib_sa_mcmember_rec *rec,
|
|
struct net_device *ndev,
|
|
enum ib_gid_type gid_type,
|
|
struct rdma_ah_attr *ah_attr)
|
|
{
|
|
const struct ib_gid_attr *sgid_attr;
|
|
|
|
/* GID table is not based on the netdevice for IB link layer,
|
|
* so ignore ndev during search.
|
|
*/
|
|
if (rdma_protocol_ib(device, port_num))
|
|
ndev = NULL;
|
|
else if (!rdma_protocol_roce(device, port_num))
|
|
return -EINVAL;
|
|
|
|
sgid_attr = rdma_find_gid_by_port(device, &rec->port_gid,
|
|
gid_type, port_num, ndev);
|
|
if (IS_ERR(sgid_attr))
|
|
return PTR_ERR(sgid_attr);
|
|
|
|
memset(ah_attr, 0, sizeof(*ah_attr));
|
|
ah_attr->type = rdma_ah_find_type(device, port_num);
|
|
|
|
rdma_ah_set_dlid(ah_attr, be16_to_cpu(rec->mlid));
|
|
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);
|
|
rdma_move_grh_sgid_attr(ah_attr, &rec->mgid,
|
|
be32_to_cpu(rec->flow_label),
|
|
rec->hop_limit, rec->traffic_class,
|
|
sgid_attr);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ib_init_ah_from_mcmember);
|
|
|
|
static void mcast_groups_event(struct mcast_port *port,
|
|
enum mcast_group_state state)
|
|
{
|
|
struct mcast_group *group;
|
|
struct rb_node *node;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
for (node = rb_first(&port->table); node; node = rb_next(node)) {
|
|
group = rb_entry(node, struct mcast_group, node);
|
|
spin_lock(&group->lock);
|
|
if (group->state == MCAST_IDLE) {
|
|
atomic_inc(&group->refcount);
|
|
queue_work(mcast_wq, &group->work);
|
|
}
|
|
if (group->state != MCAST_GROUP_ERROR)
|
|
group->state = state;
|
|
spin_unlock(&group->lock);
|
|
}
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
}
|
|
|
|
static void mcast_event_handler(struct ib_event_handler *handler,
|
|
struct ib_event *event)
|
|
{
|
|
struct mcast_device *dev;
|
|
int index;
|
|
|
|
dev = container_of(handler, struct mcast_device, event_handler);
|
|
if (!rdma_cap_ib_mcast(dev->device, event->element.port_num))
|
|
return;
|
|
|
|
index = event->element.port_num - dev->start_port;
|
|
|
|
switch (event->event) {
|
|
case IB_EVENT_PORT_ERR:
|
|
case IB_EVENT_LID_CHANGE:
|
|
case IB_EVENT_CLIENT_REREGISTER:
|
|
mcast_groups_event(&dev->port[index], MCAST_GROUP_ERROR);
|
|
break;
|
|
case IB_EVENT_PKEY_CHANGE:
|
|
mcast_groups_event(&dev->port[index], MCAST_PKEY_EVENT);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int mcast_add_one(struct ib_device *device)
|
|
{
|
|
struct mcast_device *dev;
|
|
struct mcast_port *port;
|
|
int i;
|
|
int count = 0;
|
|
|
|
dev = kmalloc(struct_size(dev, port, device->phys_port_cnt),
|
|
GFP_KERNEL);
|
|
if (!dev)
|
|
return -ENOMEM;
|
|
|
|
dev->start_port = rdma_start_port(device);
|
|
dev->end_port = rdma_end_port(device);
|
|
|
|
for (i = 0; i <= dev->end_port - dev->start_port; i++) {
|
|
if (!rdma_cap_ib_mcast(device, dev->start_port + i))
|
|
continue;
|
|
port = &dev->port[i];
|
|
port->dev = dev;
|
|
port->port_num = dev->start_port + i;
|
|
spin_lock_init(&port->lock);
|
|
port->table = RB_ROOT;
|
|
init_completion(&port->comp);
|
|
refcount_set(&port->refcount, 1);
|
|
++count;
|
|
}
|
|
|
|
if (!count) {
|
|
kfree(dev);
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
dev->device = device;
|
|
ib_set_client_data(device, &mcast_client, dev);
|
|
|
|
INIT_IB_EVENT_HANDLER(&dev->event_handler, device, mcast_event_handler);
|
|
ib_register_event_handler(&dev->event_handler);
|
|
return 0;
|
|
}
|
|
|
|
static void mcast_remove_one(struct ib_device *device, void *client_data)
|
|
{
|
|
struct mcast_device *dev = client_data;
|
|
struct mcast_port *port;
|
|
int i;
|
|
|
|
ib_unregister_event_handler(&dev->event_handler);
|
|
flush_workqueue(mcast_wq);
|
|
|
|
for (i = 0; i <= dev->end_port - dev->start_port; i++) {
|
|
if (rdma_cap_ib_mcast(device, dev->start_port + i)) {
|
|
port = &dev->port[i];
|
|
deref_port(port);
|
|
wait_for_completion(&port->comp);
|
|
}
|
|
}
|
|
|
|
kfree(dev);
|
|
}
|
|
|
|
int mcast_init(void)
|
|
{
|
|
int ret;
|
|
|
|
mcast_wq = alloc_ordered_workqueue("ib_mcast", WQ_MEM_RECLAIM);
|
|
if (!mcast_wq)
|
|
return -ENOMEM;
|
|
|
|
ib_sa_register_client(&sa_client);
|
|
|
|
ret = ib_register_client(&mcast_client);
|
|
if (ret)
|
|
goto err;
|
|
return 0;
|
|
|
|
err:
|
|
ib_sa_unregister_client(&sa_client);
|
|
destroy_workqueue(mcast_wq);
|
|
return ret;
|
|
}
|
|
|
|
void mcast_cleanup(void)
|
|
{
|
|
ib_unregister_client(&mcast_client);
|
|
ib_sa_unregister_client(&sa_client);
|
|
destroy_workqueue(mcast_wq);
|
|
}
|