Orange Pi5 kernel

/*
 * Copyright (c) 2012 Mellanox Technologies. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
 
#include <rdma/ib_mad.h>
 
#include <linux/mlx4/cmd.h>
#include <linux/rbtree.h>
#include <linux/idr.h>
#include <rdma/ib_cm.h>
 
#include "mlx4_ib.h"
 
#define CM_CLEANUP_CACHE_TIMEOUT  (30 * HZ)
 
struct id_map_entry {
<------>struct rb_node node;
 
<------>u32 sl_cm_id;
<------>u32 pv_cm_id;
<------>int slave_id;
<------>int scheduled_delete;
<------>struct mlx4_ib_dev *dev;
 
<------>struct list_head list;
<------>struct delayed_work timeout;
};
 
struct rej_tmout_entry {
<------>int slave;
<------>u32 rem_pv_cm_id;
<------>struct delayed_work timeout;
<------>struct xarray *xa_rej_tmout;
};
 
struct cm_generic_msg {
<------>struct ib_mad_hdr hdr;
 
<------>__be32 local_comm_id;
<------>__be32 remote_comm_id;
<------>unsigned char unused[2];
<------>__be16 rej_reason;
};
 
struct cm_sidr_generic_msg {
<------>struct ib_mad_hdr hdr;
<------>__be32 request_id;
};
 
struct cm_req_msg {
<------>unsigned char unused[0x60];
<------>union ib_gid primary_path_sgid;
};
 
 
static void set_local_comm_id(struct ib_mad *mad, u32 cm_id)
{
<------>if (mad->mad_hdr.attr_id == CM_SIDR_REQ_ATTR_ID) {
<------><------>struct cm_sidr_generic_msg *msg =
<------><------><------>(struct cm_sidr_generic_msg *)mad;
<------><------>msg->request_id = cpu_to_be32(cm_id);
<------>} else if (mad->mad_hdr.attr_id == CM_SIDR_REP_ATTR_ID) {
<------><------>pr_err("trying to set local_comm_id in SIDR_REP\n");
<------><------>return;
<------>} else {
<------><------>struct cm_generic_msg *msg = (struct cm_generic_msg *)mad;
<------><------>msg->local_comm_id = cpu_to_be32(cm_id);
<------>}
}
 
static u32 get_local_comm_id(struct ib_mad *mad)
{
<------>if (mad->mad_hdr.attr_id == CM_SIDR_REQ_ATTR_ID) {
<------><------>struct cm_sidr_generic_msg *msg =
<------><------><------>(struct cm_sidr_generic_msg *)mad;
<------><------>return be32_to_cpu(msg->request_id);
<------>} else if (mad->mad_hdr.attr_id == CM_SIDR_REP_ATTR_ID) {
<------><------>pr_err("trying to set local_comm_id in SIDR_REP\n");
<------><------>return -1;
<------>} else {
<------><------>struct cm_generic_msg *msg = (struct cm_generic_msg *)mad;
<------><------>return be32_to_cpu(msg->local_comm_id);
<------>}
}
 
static void set_remote_comm_id(struct ib_mad *mad, u32 cm_id)
{
<------>if (mad->mad_hdr.attr_id == CM_SIDR_REP_ATTR_ID) {
<------><------>struct cm_sidr_generic_msg *msg =
<------><------><------>(struct cm_sidr_generic_msg *)mad;
<------><------>msg->request_id = cpu_to_be32(cm_id);
<------>} else if (mad->mad_hdr.attr_id == CM_SIDR_REQ_ATTR_ID) {
<------><------>pr_err("trying to set remote_comm_id in SIDR_REQ\n");
<------><------>return;
<------>} else {
<------><------>struct cm_generic_msg *msg = (struct cm_generic_msg *)mad;
<------><------>msg->remote_comm_id = cpu_to_be32(cm_id);
<------>}
}
 
static u32 get_remote_comm_id(struct ib_mad *mad)
{
<------>if (mad->mad_hdr.attr_id == CM_SIDR_REP_ATTR_ID) {
<------><------>struct cm_sidr_generic_msg *msg =
<------><------><------>(struct cm_sidr_generic_msg *)mad;
<------><------>return be32_to_cpu(msg->request_id);
<------>} else if (mad->mad_hdr.attr_id == CM_SIDR_REQ_ATTR_ID) {
<------><------>pr_err("trying to set remote_comm_id in SIDR_REQ\n");
<------><------>return -1;
<------>} else {
<------><------>struct cm_generic_msg *msg = (struct cm_generic_msg *)mad;
<------><------>return be32_to_cpu(msg->remote_comm_id);
<------>}
}
 
static union ib_gid gid_from_req_msg(struct ib_device *ibdev, struct ib_mad *mad)
{
<------>struct cm_req_msg *msg = (struct cm_req_msg *)mad;
 
<------>return msg->primary_path_sgid;
}
 
/* Lock should be taken before called */
static struct id_map_entry *
id_map_find_by_sl_id(struct ib_device *ibdev, u32 slave_id, u32 sl_cm_id)
{
<------>struct rb_root *sl_id_map = &to_mdev(ibdev)->sriov.sl_id_map;
<------>struct rb_node *node = sl_id_map->rb_node;
 
<------>while (node) {
<------><------>struct id_map_entry *id_map_entry =
<------><------><------>rb_entry(node, struct id_map_entry, node);
 
<------><------>if (id_map_entry->sl_cm_id > sl_cm_id)
<------><------><------>node = node->rb_left;
<------><------>else if (id_map_entry->sl_cm_id < sl_cm_id)
<------><------><------>node = node->rb_right;
<------><------>else if (id_map_entry->slave_id > slave_id)
<------><------><------>node = node->rb_left;
<------><------>else if (id_map_entry->slave_id < slave_id)
<------><------><------>node = node->rb_right;
<------><------>else
<------><------><------>return id_map_entry;
<------>}
<------>return NULL;
}
 
static void id_map_ent_timeout(struct work_struct *work)
{
<------>struct delayed_work *delay = to_delayed_work(work);
<------>struct id_map_entry *ent = container_of(delay, struct id_map_entry, timeout);
<------>struct id_map_entry *found_ent;
<------>struct mlx4_ib_dev *dev = ent->dev;
<------>struct mlx4_ib_sriov *sriov = &dev->sriov;
<------>struct rb_root *sl_id_map = &sriov->sl_id_map;
 
<------>spin_lock(&sriov->id_map_lock);
<------>if (!xa_erase(&sriov->pv_id_table, ent->pv_cm_id))
<------><------>goto out;
<------>found_ent = id_map_find_by_sl_id(&dev->ib_dev, ent->slave_id, ent->sl_cm_id);
<------>if (found_ent && found_ent == ent)
<------><------>rb_erase(&found_ent->node, sl_id_map);
 
out:
<------>list_del(&ent->list);
<------>spin_unlock(&sriov->id_map_lock);
<------>kfree(ent);
}
 
static void sl_id_map_add(struct ib_device *ibdev, struct id_map_entry *new)
{
<------>struct rb_root *sl_id_map = &to_mdev(ibdev)->sriov.sl_id_map;
<------>struct rb_node **link = &sl_id_map->rb_node, *parent = NULL;
<------>struct id_map_entry *ent;
<------>int slave_id = new->slave_id;
<------>int sl_cm_id = new->sl_cm_id;
 
<------>ent = id_map_find_by_sl_id(ibdev, slave_id, sl_cm_id);
<------>if (ent) {
<------><------>pr_debug("overriding existing sl_id_map entry (cm_id = %x)\n",
<------><------><------> sl_cm_id);
 
<------><------>rb_replace_node(&ent->node, &new->node, sl_id_map);
<------><------>return;
<------>}
 
<------>/* Go to the bottom of the tree */
<------>while (*link) {
<------><------>parent = *link;
<------><------>ent = rb_entry(parent, struct id_map_entry, node);
 
<------><------>if (ent->sl_cm_id > sl_cm_id || (ent->sl_cm_id == sl_cm_id && ent->slave_id > slave_id))
<------><------><------>link = &(*link)->rb_left;
<------><------>else
<------><------><------>link = &(*link)->rb_right;
<------>}
 
<------>rb_link_node(&new->node, parent, link);
<------>rb_insert_color(&new->node, sl_id_map);
}
 
static struct id_map_entry *
id_map_alloc(struct ib_device *ibdev, int slave_id, u32 sl_cm_id)
{
<------>int ret;
<------>struct id_map_entry *ent;
<------>struct mlx4_ib_sriov *sriov = &to_mdev(ibdev)->sriov;
 
<------>ent = kmalloc(sizeof (struct id_map_entry), GFP_KERNEL);
<------>if (!ent)
<------><------>return ERR_PTR(-ENOMEM);
 
<------>ent->sl_cm_id = sl_cm_id;
<------>ent->slave_id = slave_id;
<------>ent->scheduled_delete = 0;
<------>ent->dev = to_mdev(ibdev);
<------>INIT_DELAYED_WORK(&ent->timeout, id_map_ent_timeout);
 
<------>ret = xa_alloc_cyclic(&sriov->pv_id_table, &ent->pv_cm_id, ent,
<------><------><------>xa_limit_32b, &sriov->pv_id_next, GFP_KERNEL);
<------>if (ret >= 0) {
<------><------>spin_lock(&sriov->id_map_lock);
<------><------>sl_id_map_add(ibdev, ent);
<------><------>list_add_tail(&ent->list, &sriov->cm_list);
<------><------>spin_unlock(&sriov->id_map_lock);
<------><------>return ent;
<------>}
 
<------>/*error flow*/
<------>kfree(ent);
<------>mlx4_ib_warn(ibdev, "Allocation failed (err:0x%x)\n", ret);
<------>return ERR_PTR(-ENOMEM);
}
 
static struct id_map_entry *
id_map_get(struct ib_device *ibdev, int *pv_cm_id, int slave_id, int sl_cm_id)
{
<------>struct id_map_entry *ent;
<------>struct mlx4_ib_sriov *sriov = &to_mdev(ibdev)->sriov;
 
<------>spin_lock(&sriov->id_map_lock);
<------>if (*pv_cm_id == -1) {
<------><------>ent = id_map_find_by_sl_id(ibdev, slave_id, sl_cm_id);
<------><------>if (ent)
<------><------><------>*pv_cm_id = (int) ent->pv_cm_id;
<------>} else
<------><------>ent = xa_load(&sriov->pv_id_table, *pv_cm_id);
<------>spin_unlock(&sriov->id_map_lock);
 
<------>return ent;
}
 
static void schedule_delayed(struct ib_device *ibdev, struct id_map_entry *id)
{
<------>struct mlx4_ib_sriov *sriov = &to_mdev(ibdev)->sriov;
<------>unsigned long flags;
 
<------>spin_lock(&sriov->id_map_lock);
<------>spin_lock_irqsave(&sriov->going_down_lock, flags);
<------>/*make sure that there is no schedule inside the scheduled work.*/
<------>if (!sriov->is_going_down && !id->scheduled_delete) {
<------><------>id->scheduled_delete = 1;
<------><------>schedule_delayed_work(&id->timeout, CM_CLEANUP_CACHE_TIMEOUT);
<------>} else if (id->scheduled_delete) {
<------><------>/* Adjust timeout if already scheduled */
<------><------>mod_delayed_work(system_wq, &id->timeout, CM_CLEANUP_CACHE_TIMEOUT);
<------>}
<------>spin_unlock_irqrestore(&sriov->going_down_lock, flags);
<------>spin_unlock(&sriov->id_map_lock);
}
 
#define REJ_REASON(m) be16_to_cpu(((struct cm_generic_msg *)(m))->rej_reason)
int mlx4_ib_multiplex_cm_handler(struct ib_device *ibdev, int port, int slave_id,
<------><------>struct ib_mad *mad)
{
<------>struct id_map_entry *id;
<------>u32 sl_cm_id;
<------>int pv_cm_id = -1;
 
<------>if (mad->mad_hdr.attr_id == CM_REQ_ATTR_ID ||
<------>    mad->mad_hdr.attr_id == CM_REP_ATTR_ID ||
<------>    mad->mad_hdr.attr_id == CM_MRA_ATTR_ID ||
<------>    mad->mad_hdr.attr_id == CM_SIDR_REQ_ATTR_ID ||
<------>    (mad->mad_hdr.attr_id == CM_REJ_ATTR_ID && REJ_REASON(mad) == IB_CM_REJ_TIMEOUT)) {
<------><------>sl_cm_id = get_local_comm_id(mad);
<------><------>id = id_map_get(ibdev, &pv_cm_id, slave_id, sl_cm_id);
<------><------>if (id)
<------><------><------>goto cont;
<------><------>id = id_map_alloc(ibdev, slave_id, sl_cm_id);
<------><------>if (IS_ERR(id)) {
<------><------><------>mlx4_ib_warn(ibdev, "%s: id{slave: %d, sl_cm_id: 0x%x} Failed to id_map_alloc\n",
<------><------><------><------>__func__, slave_id, sl_cm_id);
<------><------><------>return PTR_ERR(id);
<------><------>}
<------>} else if (mad->mad_hdr.attr_id == CM_REJ_ATTR_ID ||
<------><------>   mad->mad_hdr.attr_id == CM_SIDR_REP_ATTR_ID) {
<------><------>return 0;
<------>} else {
<------><------>sl_cm_id = get_local_comm_id(mad);
<------><------>id = id_map_get(ibdev, &pv_cm_id, slave_id, sl_cm_id);
<------>}
 
<------>if (!id) {
<------><------>pr_debug("id{slave: %d, sl_cm_id: 0x%x} is NULL! attr_id: 0x%x\n",
<------><------><------> slave_id, sl_cm_id, be16_to_cpu(mad->mad_hdr.attr_id));
<------><------>return -EINVAL;
<------>}
 
cont:
<------>set_local_comm_id(mad, id->pv_cm_id);
 
<------>if (mad->mad_hdr.attr_id == CM_DREQ_ATTR_ID)
<------><------>schedule_delayed(ibdev, id);
<------>return 0;
}
 
static void rej_tmout_timeout(struct work_struct *work)
{
<------>struct delayed_work *delay = to_delayed_work(work);
<------>struct rej_tmout_entry *item = container_of(delay, struct rej_tmout_entry, timeout);
<------>struct rej_tmout_entry *deleted;
 
<------>deleted = xa_cmpxchg(item->xa_rej_tmout, item->rem_pv_cm_id, item, NULL, 0);
 
<------>if (deleted != item)
<------><------>pr_debug("deleted(%p) != item(%p)\n", deleted, item);
 
<------>kfree(item);
}
 
static int alloc_rej_tmout(struct mlx4_ib_sriov *sriov, u32 rem_pv_cm_id, int slave)
{
<------>struct rej_tmout_entry *item;
<------>struct rej_tmout_entry *old;
<------>int ret = 0;
 
<------>xa_lock(&sriov->xa_rej_tmout);
<------>item = xa_load(&sriov->xa_rej_tmout, (unsigned long)rem_pv_cm_id);
 
<------>if (item) {
<------><------>if (xa_err(item))
<------><------><------>ret =  xa_err(item);
<------><------>else
<------><------><------>/* If a retry, adjust delayed work */
<------><------><------>mod_delayed_work(system_wq, &item->timeout, CM_CLEANUP_CACHE_TIMEOUT);
<------><------>goto err_or_exists;
<------>}
<------>xa_unlock(&sriov->xa_rej_tmout);
 
<------>item = kmalloc(sizeof(*item), GFP_KERNEL);
<------>if (!item)
<------><------>return -ENOMEM;
 
<------>INIT_DELAYED_WORK(&item->timeout, rej_tmout_timeout);
<------>item->slave = slave;
<------>item->rem_pv_cm_id = rem_pv_cm_id;
<------>item->xa_rej_tmout = &sriov->xa_rej_tmout;
 
<------>old = xa_cmpxchg(&sriov->xa_rej_tmout, (unsigned long)rem_pv_cm_id, NULL, item, GFP_KERNEL);
<------>if (old) {
<------><------>pr_debug(
<------><------><------>"Non-null old entry (%p) or error (%d) when inserting\n",
<------><------><------>old, xa_err(old));
<------><------>kfree(item);
<------><------>return xa_err(old);
<------>}
 
<------>schedule_delayed_work(&item->timeout, CM_CLEANUP_CACHE_TIMEOUT);
 
<------>return 0;
 
err_or_exists:
<------>xa_unlock(&sriov->xa_rej_tmout);
<------>return ret;
}
 
static int lookup_rej_tmout_slave(struct mlx4_ib_sriov *sriov, u32 rem_pv_cm_id)
{
<------>struct rej_tmout_entry *item;
<------>int slave;
 
<------>xa_lock(&sriov->xa_rej_tmout);
<------>item = xa_load(&sriov->xa_rej_tmout, (unsigned long)rem_pv_cm_id);
 
<------>if (!item || xa_err(item)) {
<------><------>pr_debug("Could not find slave. rem_pv_cm_id 0x%x error: %d\n",
<------><------><------> rem_pv_cm_id, xa_err(item));
<------><------>slave = !item ? -ENOENT : xa_err(item);
<------>} else {
<------><------>slave = item->slave;
<------>}
<------>xa_unlock(&sriov->xa_rej_tmout);
 
<------>return slave;
}
 
int mlx4_ib_demux_cm_handler(struct ib_device *ibdev, int port, int *slave,
<------><------><------>     struct ib_mad *mad)
{
<------>struct mlx4_ib_sriov *sriov = &to_mdev(ibdev)->sriov;
<------>u32 rem_pv_cm_id = get_local_comm_id(mad);
<------>u32 pv_cm_id;
<------>struct id_map_entry *id;
<------>int sts;
 
<------>if (mad->mad_hdr.attr_id == CM_REQ_ATTR_ID ||
<------>    mad->mad_hdr.attr_id == CM_SIDR_REQ_ATTR_ID) {
<------><------>union ib_gid gid;
 
<------><------>if (!slave)
<------><------><------>return 0;
 
<------><------>gid = gid_from_req_msg(ibdev, mad);
<------><------>*slave = mlx4_ib_find_real_gid(ibdev, port, gid.global.interface_id);
<------><------>if (*slave < 0) {
<------><------><------>mlx4_ib_warn(ibdev, "failed matching slave_id by gid (0x%llx)\n",
<------><------><------><------>     be64_to_cpu(gid.global.interface_id));
<------><------><------>return -ENOENT;
<------><------>}
 
<------><------>sts = alloc_rej_tmout(sriov, rem_pv_cm_id, *slave);
<------><------>if (sts)
<------><------><------>/* Even if this fails, we pass on the REQ to the slave */
<------><------><------>pr_debug("Could not allocate rej_tmout entry. rem_pv_cm_id 0x%x slave %d status %d\n",
<------><------><------><------> rem_pv_cm_id, *slave, sts);
 
<------><------>return 0;
<------>}
 
<------>pv_cm_id = get_remote_comm_id(mad);
<------>id = id_map_get(ibdev, (int *)&pv_cm_id, -1, -1);
 
<------>if (!id) {
<------><------>if (mad->mad_hdr.attr_id == CM_REJ_ATTR_ID &&
<------><------>    REJ_REASON(mad) == IB_CM_REJ_TIMEOUT && slave) {
<------><------><------>*slave = lookup_rej_tmout_slave(sriov, rem_pv_cm_id);
 
<------><------><------>return (*slave < 0) ? *slave : 0;
<------><------>}
<------><------>pr_debug("Couldn't find an entry for pv_cm_id 0x%x, attr_id 0x%x\n",
<------><------><------> pv_cm_id, be16_to_cpu(mad->mad_hdr.attr_id));
<------><------>return -ENOENT;
<------>}
 
<------>if (slave)
<------><------>*slave = id->slave_id;
<------>set_remote_comm_id(mad, id->sl_cm_id);
 
<------>if (mad->mad_hdr.attr_id == CM_DREQ_ATTR_ID ||
<------>    mad->mad_hdr.attr_id == CM_REJ_ATTR_ID)
<------><------>schedule_delayed(ibdev, id);
 
<------>return 0;
}
 
void mlx4_ib_cm_paravirt_init(struct mlx4_ib_dev *dev)
{
<------>spin_lock_init(&dev->sriov.id_map_lock);
<------>INIT_LIST_HEAD(&dev->sriov.cm_list);
<------>dev->sriov.sl_id_map = RB_ROOT;
<------>xa_init_flags(&dev->sriov.pv_id_table, XA_FLAGS_ALLOC);
<------>xa_init(&dev->sriov.xa_rej_tmout);
}
 
static void rej_tmout_xa_cleanup(struct mlx4_ib_sriov *sriov, int slave)
{
<------>struct rej_tmout_entry *item;
<------>bool flush_needed = false;
<------>unsigned long id;
<------>int cnt = 0;
 
<------>xa_lock(&sriov->xa_rej_tmout);
<------>xa_for_each(&sriov->xa_rej_tmout, id, item) {
<------><------>if (slave < 0 || slave == item->slave) {
<------><------><------>mod_delayed_work(system_wq, &item->timeout, 0);
<------><------><------>flush_needed = true;
<------><------><------>++cnt;
<------><------>}
<------>}
<------>xa_unlock(&sriov->xa_rej_tmout);
 
<------>if (flush_needed) {
<------><------>flush_scheduled_work();
<------><------>pr_debug("Deleted %d entries in xarray for slave %d during cleanup\n",
<------><------><------> cnt, slave);
<------>}
 
<------>if (slave < 0)
<------><------>WARN_ON(!xa_empty(&sriov->xa_rej_tmout));
}
 
/* slave = -1 ==> all slaves */
/* TBD -- call paravirt clean for single slave.  Need for slave RESET event */
void mlx4_ib_cm_paravirt_clean(struct mlx4_ib_dev *dev, int slave)
{
<------>struct mlx4_ib_sriov *sriov = &dev->sriov;
<------>struct rb_root *sl_id_map = &sriov->sl_id_map;
<------>struct list_head lh;
<------>struct rb_node *nd;
<------>int need_flush = 0;
<------>struct id_map_entry *map, *tmp_map;
<------>/* cancel all delayed work queue entries */
<------>INIT_LIST_HEAD(&lh);
<------>spin_lock(&sriov->id_map_lock);
<------>list_for_each_entry_safe(map, tmp_map, &dev->sriov.cm_list, list) {
<------><------>if (slave < 0 || slave == map->slave_id) {
<------><------><------>if (map->scheduled_delete)
<------><------><------><------>need_flush |= !cancel_delayed_work(&map->timeout);
<------><------>}
<------>}
 
<------>spin_unlock(&sriov->id_map_lock);
 
<------>if (need_flush)
<------><------>flush_scheduled_work(); /* make sure all timers were flushed */
 
<------>/* now, remove all leftover entries from databases*/
<------>spin_lock(&sriov->id_map_lock);
<------>if (slave < 0) {
<------><------>while (rb_first(sl_id_map)) {
<------><------><------>struct id_map_entry *ent =
<------><------><------><------>rb_entry(rb_first(sl_id_map),
<------><------><------><------><------> struct id_map_entry, node);
 
<------><------><------>rb_erase(&ent->node, sl_id_map);
<------><------><------>xa_erase(&sriov->pv_id_table, ent->pv_cm_id);
<------><------>}
<------><------>list_splice_init(&dev->sriov.cm_list, &lh);
<------>} else {
<------><------>/* first, move nodes belonging to slave to db remove list */
<------><------>nd = rb_first(sl_id_map);
<------><------>while (nd) {
<------><------><------>struct id_map_entry *ent =
<------><------><------><------>rb_entry(nd, struct id_map_entry, node);
<------><------><------>nd = rb_next(nd);
<------><------><------>if (ent->slave_id == slave)
<------><------><------><------>list_move_tail(&ent->list, &lh);
<------><------>}
<------><------>/* remove those nodes from databases */
<------><------>list_for_each_entry_safe(map, tmp_map, &lh, list) {
<------><------><------>rb_erase(&map->node, sl_id_map);
<------><------><------>xa_erase(&sriov->pv_id_table, map->pv_cm_id);
<------><------>}
 
<------><------>/* add remaining nodes from cm_list */
<------><------>list_for_each_entry_safe(map, tmp_map, &dev->sriov.cm_list, list) {
<------><------><------>if (slave == map->slave_id)
<------><------><------><------>list_move_tail(&map->list, &lh);
<------><------>}
<------>}
 
<------>spin_unlock(&sriov->id_map_lock);
 
<------>/* free any map entries left behind due to cancel_delayed_work above */
<------>list_for_each_entry_safe(map, tmp_map, &lh, list) {
<------><------>list_del(&map->list);
<------><------>kfree(map);
<------>}
 
<------>rej_tmout_xa_cleanup(sriov, slave);
}