![Matan Barak](/assets/img/avatar_default.png)
Refactor ib_dispatch_event into a new function in order to avoid duplicating code in the next patch. Signed-off-by: Matan Barak <matanb@mellanox.com> Reviewed-by: Haggai Eran <haggaie@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
1103 lines
28 KiB
C
1103 lines
28 KiB
C
/*
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* Copyright (c) 2004 Topspin Communications. All rights reserved.
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* Copyright (c) 2005 Intel Corporation. All rights reserved.
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* Copyright (c) 2005 Sun Microsystems, Inc. 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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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/workqueue.h>
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#include <linux/netdevice.h>
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#include <net/addrconf.h>
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#include <rdma/ib_cache.h>
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#include "core_priv.h"
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struct ib_pkey_cache {
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int table_len;
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u16 table[0];
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};
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struct ib_update_work {
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struct work_struct work;
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struct ib_device *device;
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u8 port_num;
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};
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union ib_gid zgid;
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EXPORT_SYMBOL(zgid);
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static const struct ib_gid_attr zattr;
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enum gid_attr_find_mask {
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GID_ATTR_FIND_MASK_GID = 1UL << 0,
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GID_ATTR_FIND_MASK_NETDEV = 1UL << 1,
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GID_ATTR_FIND_MASK_DEFAULT = 1UL << 2,
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};
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enum gid_table_entry_props {
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GID_TABLE_ENTRY_INVALID = 1UL << 0,
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GID_TABLE_ENTRY_DEFAULT = 1UL << 1,
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};
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enum gid_table_write_action {
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GID_TABLE_WRITE_ACTION_ADD,
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GID_TABLE_WRITE_ACTION_DEL,
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/* MODIFY only updates the GID table. Currently only used by
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* ib_cache_update.
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*/
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GID_TABLE_WRITE_ACTION_MODIFY
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};
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struct ib_gid_table_entry {
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/* This lock protects an entry from being
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* read and written simultaneously.
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*/
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rwlock_t lock;
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unsigned long props;
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union ib_gid gid;
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struct ib_gid_attr attr;
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void *context;
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};
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struct ib_gid_table {
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int sz;
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/* In RoCE, adding a GID to the table requires:
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* (a) Find if this GID is already exists.
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* (b) Find a free space.
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* (c) Write the new GID
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*
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* Delete requires different set of operations:
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* (a) Find the GID
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* (b) Delete it.
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*
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* Add/delete should be carried out atomically.
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* This is done by locking this mutex from multiple
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* writers. We don't need this lock for IB, as the MAD
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* layer replaces all entries. All data_vec entries
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* are locked by this lock.
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**/
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struct mutex lock;
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struct ib_gid_table_entry *data_vec;
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};
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static void dispatch_gid_change_event(struct ib_device *ib_dev, u8 port)
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{
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if (rdma_cap_roce_gid_table(ib_dev, port)) {
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struct ib_event event;
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event.device = ib_dev;
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event.element.port_num = port;
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event.event = IB_EVENT_GID_CHANGE;
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ib_dispatch_event(&event);
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}
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}
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static int write_gid(struct ib_device *ib_dev, u8 port,
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struct ib_gid_table *table, int ix,
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const union ib_gid *gid,
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const struct ib_gid_attr *attr,
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enum gid_table_write_action action,
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bool default_gid)
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{
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int ret = 0;
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struct net_device *old_net_dev;
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unsigned long flags;
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/* in rdma_cap_roce_gid_table, this funciton should be protected by a
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* sleep-able lock.
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*/
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write_lock_irqsave(&table->data_vec[ix].lock, flags);
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if (rdma_cap_roce_gid_table(ib_dev, port)) {
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table->data_vec[ix].props |= GID_TABLE_ENTRY_INVALID;
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write_unlock_irqrestore(&table->data_vec[ix].lock, flags);
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/* GID_TABLE_WRITE_ACTION_MODIFY currently isn't supported by
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* RoCE providers and thus only updates the cache.
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*/
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if (action == GID_TABLE_WRITE_ACTION_ADD)
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ret = ib_dev->add_gid(ib_dev, port, ix, gid, attr,
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&table->data_vec[ix].context);
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else if (action == GID_TABLE_WRITE_ACTION_DEL)
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ret = ib_dev->del_gid(ib_dev, port, ix,
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&table->data_vec[ix].context);
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write_lock_irqsave(&table->data_vec[ix].lock, flags);
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}
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old_net_dev = table->data_vec[ix].attr.ndev;
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if (old_net_dev && old_net_dev != attr->ndev)
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dev_put(old_net_dev);
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/* if modify_gid failed, just delete the old gid */
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if (ret || action == GID_TABLE_WRITE_ACTION_DEL) {
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gid = &zgid;
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attr = &zattr;
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table->data_vec[ix].context = NULL;
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}
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if (default_gid)
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table->data_vec[ix].props |= GID_TABLE_ENTRY_DEFAULT;
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memcpy(&table->data_vec[ix].gid, gid, sizeof(*gid));
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memcpy(&table->data_vec[ix].attr, attr, sizeof(*attr));
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if (table->data_vec[ix].attr.ndev &&
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table->data_vec[ix].attr.ndev != old_net_dev)
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dev_hold(table->data_vec[ix].attr.ndev);
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table->data_vec[ix].props &= ~GID_TABLE_ENTRY_INVALID;
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write_unlock_irqrestore(&table->data_vec[ix].lock, flags);
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if (!ret)
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dispatch_gid_change_event(ib_dev, port);
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return ret;
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}
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static int add_gid(struct ib_device *ib_dev, u8 port,
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struct ib_gid_table *table, int ix,
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const union ib_gid *gid,
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const struct ib_gid_attr *attr,
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bool default_gid) {
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return write_gid(ib_dev, port, table, ix, gid, attr,
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GID_TABLE_WRITE_ACTION_ADD, default_gid);
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}
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static int modify_gid(struct ib_device *ib_dev, u8 port,
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struct ib_gid_table *table, int ix,
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const union ib_gid *gid,
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const struct ib_gid_attr *attr,
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bool default_gid) {
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return write_gid(ib_dev, port, table, ix, gid, attr,
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GID_TABLE_WRITE_ACTION_MODIFY, default_gid);
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}
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static int del_gid(struct ib_device *ib_dev, u8 port,
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struct ib_gid_table *table, int ix,
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bool default_gid) {
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return write_gid(ib_dev, port, table, ix, &zgid, &zattr,
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GID_TABLE_WRITE_ACTION_DEL, default_gid);
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}
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static int find_gid(struct ib_gid_table *table, const union ib_gid *gid,
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const struct ib_gid_attr *val, bool default_gid,
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unsigned long mask)
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{
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int i;
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for (i = 0; i < table->sz; i++) {
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unsigned long flags;
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struct ib_gid_attr *attr = &table->data_vec[i].attr;
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read_lock_irqsave(&table->data_vec[i].lock, flags);
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if (table->data_vec[i].props & GID_TABLE_ENTRY_INVALID)
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goto next;
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if (mask & GID_ATTR_FIND_MASK_GID &&
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memcmp(gid, &table->data_vec[i].gid, sizeof(*gid)))
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goto next;
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if (mask & GID_ATTR_FIND_MASK_NETDEV &&
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attr->ndev != val->ndev)
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goto next;
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if (mask & GID_ATTR_FIND_MASK_DEFAULT &&
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!!(table->data_vec[i].props & GID_TABLE_ENTRY_DEFAULT) !=
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default_gid)
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goto next;
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read_unlock_irqrestore(&table->data_vec[i].lock, flags);
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return i;
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next:
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read_unlock_irqrestore(&table->data_vec[i].lock, flags);
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}
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return -1;
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}
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static void make_default_gid(struct net_device *dev, union ib_gid *gid)
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{
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gid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
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addrconf_ifid_eui48(&gid->raw[8], dev);
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}
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int ib_cache_gid_add(struct ib_device *ib_dev, u8 port,
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union ib_gid *gid, struct ib_gid_attr *attr)
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{
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struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
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struct ib_gid_table *table;
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int ix;
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int ret = 0;
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struct net_device *idev;
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table = ports_table[port - rdma_start_port(ib_dev)];
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if (!memcmp(gid, &zgid, sizeof(*gid)))
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return -EINVAL;
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if (ib_dev->get_netdev) {
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idev = ib_dev->get_netdev(ib_dev, port);
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if (idev && attr->ndev != idev) {
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union ib_gid default_gid;
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/* Adding default GIDs in not permitted */
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make_default_gid(idev, &default_gid);
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if (!memcmp(gid, &default_gid, sizeof(*gid))) {
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dev_put(idev);
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return -EPERM;
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}
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}
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if (idev)
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dev_put(idev);
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}
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mutex_lock(&table->lock);
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ix = find_gid(table, gid, attr, false, GID_ATTR_FIND_MASK_GID |
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GID_ATTR_FIND_MASK_NETDEV);
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if (ix >= 0)
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goto out_unlock;
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ix = find_gid(table, &zgid, NULL, false, GID_ATTR_FIND_MASK_GID |
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GID_ATTR_FIND_MASK_DEFAULT);
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if (ix < 0) {
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ret = -ENOSPC;
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goto out_unlock;
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}
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add_gid(ib_dev, port, table, ix, gid, attr, false);
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out_unlock:
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mutex_unlock(&table->lock);
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return ret;
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}
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int ib_cache_gid_del(struct ib_device *ib_dev, u8 port,
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union ib_gid *gid, struct ib_gid_attr *attr)
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{
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struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
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struct ib_gid_table *table;
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int ix;
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table = ports_table[port - rdma_start_port(ib_dev)];
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mutex_lock(&table->lock);
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ix = find_gid(table, gid, attr, false,
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GID_ATTR_FIND_MASK_GID |
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GID_ATTR_FIND_MASK_NETDEV |
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GID_ATTR_FIND_MASK_DEFAULT);
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if (ix < 0)
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goto out_unlock;
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del_gid(ib_dev, port, table, ix, false);
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out_unlock:
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mutex_unlock(&table->lock);
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return 0;
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}
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int ib_cache_gid_del_all_netdev_gids(struct ib_device *ib_dev, u8 port,
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struct net_device *ndev)
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{
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struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
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struct ib_gid_table *table;
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int ix;
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table = ports_table[port - rdma_start_port(ib_dev)];
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mutex_lock(&table->lock);
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for (ix = 0; ix < table->sz; ix++)
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if (table->data_vec[ix].attr.ndev == ndev)
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del_gid(ib_dev, port, table, ix, false);
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mutex_unlock(&table->lock);
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return 0;
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}
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static int __ib_cache_gid_get(struct ib_device *ib_dev, u8 port, int index,
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union ib_gid *gid, struct ib_gid_attr *attr)
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{
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struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
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struct ib_gid_table *table;
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unsigned long flags;
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table = ports_table[port - rdma_start_port(ib_dev)];
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if (index < 0 || index >= table->sz)
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return -EINVAL;
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read_lock_irqsave(&table->data_vec[index].lock, flags);
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if (table->data_vec[index].props & GID_TABLE_ENTRY_INVALID) {
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read_unlock_irqrestore(&table->data_vec[index].lock, flags);
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return -EAGAIN;
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}
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memcpy(gid, &table->data_vec[index].gid, sizeof(*gid));
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if (attr) {
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memcpy(attr, &table->data_vec[index].attr, sizeof(*attr));
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if (attr->ndev)
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dev_hold(attr->ndev);
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}
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read_unlock_irqrestore(&table->data_vec[index].lock, flags);
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return 0;
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}
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static int _ib_cache_gid_table_find(struct ib_device *ib_dev,
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const union ib_gid *gid,
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const struct ib_gid_attr *val,
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unsigned long mask,
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u8 *port, u16 *index)
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{
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struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
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struct ib_gid_table *table;
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u8 p;
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int local_index;
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for (p = 0; p < ib_dev->phys_port_cnt; p++) {
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table = ports_table[p];
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local_index = find_gid(table, gid, val, false, mask);
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if (local_index >= 0) {
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if (index)
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*index = local_index;
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if (port)
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*port = p + rdma_start_port(ib_dev);
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return 0;
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}
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}
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return -ENOENT;
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}
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static int ib_cache_gid_find(struct ib_device *ib_dev,
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const union ib_gid *gid,
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struct net_device *ndev, u8 *port,
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u16 *index)
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{
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unsigned long mask = GID_ATTR_FIND_MASK_GID;
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struct ib_gid_attr gid_attr_val = {.ndev = ndev};
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if (ndev)
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mask |= GID_ATTR_FIND_MASK_NETDEV;
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return _ib_cache_gid_table_find(ib_dev, gid, &gid_attr_val,
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mask, port, index);
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}
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int ib_find_cached_gid_by_port(struct ib_device *ib_dev,
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const union ib_gid *gid,
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u8 port, struct net_device *ndev,
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u16 *index)
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{
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int local_index;
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struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
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struct ib_gid_table *table;
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unsigned long mask = GID_ATTR_FIND_MASK_GID;
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struct ib_gid_attr val = {.ndev = ndev};
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if (port < rdma_start_port(ib_dev) ||
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port > rdma_end_port(ib_dev))
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return -ENOENT;
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table = ports_table[port - rdma_start_port(ib_dev)];
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if (ndev)
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mask |= GID_ATTR_FIND_MASK_NETDEV;
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local_index = find_gid(table, gid, &val, false, mask);
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if (local_index >= 0) {
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if (index)
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*index = local_index;
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return 0;
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}
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return -ENOENT;
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}
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EXPORT_SYMBOL(ib_find_cached_gid_by_port);
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/**
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* ib_find_gid_by_filter - Returns the GID table index where a specified
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* GID value occurs
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* @device: The device to query.
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* @gid: The GID value to search for.
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* @port_num: The port number of the device where the GID value could be
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* searched.
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* @filter: The filter function is executed on any matching GID in the table.
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* If the filter function returns true, the corresponding index is returned,
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* otherwise, we continue searching the GID table. It's guaranteed that
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* while filter is executed, ndev field is valid and the structure won't
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* change. filter is executed in an atomic context. filter must not be NULL.
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* @index: The index into the cached GID table where the GID was found. This
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* parameter may be NULL.
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*
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* ib_cache_gid_find_by_filter() searches for the specified GID value
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* of which the filter function returns true in the port's GID table.
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* This function is only supported on RoCE ports.
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*
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*/
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static int ib_cache_gid_find_by_filter(struct ib_device *ib_dev,
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const union ib_gid *gid,
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u8 port,
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bool (*filter)(const union ib_gid *,
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const struct ib_gid_attr *,
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void *),
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void *context,
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u16 *index)
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{
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struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
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struct ib_gid_table *table;
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unsigned int i;
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bool found = false;
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if (!ports_table)
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return -EOPNOTSUPP;
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if (port < rdma_start_port(ib_dev) ||
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port > rdma_end_port(ib_dev) ||
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!rdma_protocol_roce(ib_dev, port))
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return -EPROTONOSUPPORT;
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table = ports_table[port - rdma_start_port(ib_dev)];
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for (i = 0; i < table->sz; i++) {
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struct ib_gid_attr attr;
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unsigned long flags;
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|
|
read_lock_irqsave(&table->data_vec[i].lock, flags);
|
|
if (table->data_vec[i].props & GID_TABLE_ENTRY_INVALID)
|
|
goto next;
|
|
|
|
if (memcmp(gid, &table->data_vec[i].gid, sizeof(*gid)))
|
|
goto next;
|
|
|
|
memcpy(&attr, &table->data_vec[i].attr, sizeof(attr));
|
|
|
|
if (filter(gid, &attr, context))
|
|
found = true;
|
|
|
|
next:
|
|
read_unlock_irqrestore(&table->data_vec[i].lock, flags);
|
|
|
|
if (found)
|
|
break;
|
|
}
|
|
|
|
if (!found)
|
|
return -ENOENT;
|
|
|
|
if (index)
|
|
*index = i;
|
|
return 0;
|
|
}
|
|
|
|
static struct ib_gid_table *alloc_gid_table(int sz)
|
|
{
|
|
unsigned int i;
|
|
struct ib_gid_table *table =
|
|
kzalloc(sizeof(struct ib_gid_table), GFP_KERNEL);
|
|
if (!table)
|
|
return NULL;
|
|
|
|
table->data_vec = kcalloc(sz, sizeof(*table->data_vec), GFP_KERNEL);
|
|
if (!table->data_vec)
|
|
goto err_free_table;
|
|
|
|
mutex_init(&table->lock);
|
|
|
|
table->sz = sz;
|
|
|
|
for (i = 0; i < sz; i++)
|
|
rwlock_init(&table->data_vec[i].lock);
|
|
|
|
return table;
|
|
|
|
err_free_table:
|
|
kfree(table);
|
|
return NULL;
|
|
}
|
|
|
|
static void release_gid_table(struct ib_gid_table *table)
|
|
{
|
|
if (table) {
|
|
kfree(table->data_vec);
|
|
kfree(table);
|
|
}
|
|
}
|
|
|
|
static void cleanup_gid_table_port(struct ib_device *ib_dev, u8 port,
|
|
struct ib_gid_table *table)
|
|
{
|
|
int i;
|
|
|
|
if (!table)
|
|
return;
|
|
|
|
for (i = 0; i < table->sz; ++i) {
|
|
if (memcmp(&table->data_vec[i].gid, &zgid,
|
|
sizeof(table->data_vec[i].gid)))
|
|
del_gid(ib_dev, port, table, i,
|
|
table->data_vec[i].props &
|
|
GID_ATTR_FIND_MASK_DEFAULT);
|
|
}
|
|
}
|
|
|
|
void ib_cache_gid_set_default_gid(struct ib_device *ib_dev, u8 port,
|
|
struct net_device *ndev,
|
|
enum ib_cache_gid_default_mode mode)
|
|
{
|
|
struct ib_gid_table **ports_table = ib_dev->cache.gid_cache;
|
|
union ib_gid gid;
|
|
struct ib_gid_attr gid_attr;
|
|
struct ib_gid_table *table;
|
|
int ix;
|
|
union ib_gid current_gid;
|
|
struct ib_gid_attr current_gid_attr = {};
|
|
|
|
table = ports_table[port - rdma_start_port(ib_dev)];
|
|
|
|
make_default_gid(ndev, &gid);
|
|
memset(&gid_attr, 0, sizeof(gid_attr));
|
|
gid_attr.ndev = ndev;
|
|
|
|
mutex_lock(&table->lock);
|
|
ix = find_gid(table, NULL, NULL, true, GID_ATTR_FIND_MASK_DEFAULT);
|
|
|
|
/* Coudn't find default GID location */
|
|
WARN_ON(ix < 0);
|
|
|
|
if (!__ib_cache_gid_get(ib_dev, port, ix,
|
|
¤t_gid, ¤t_gid_attr) &&
|
|
mode == IB_CACHE_GID_DEFAULT_MODE_SET &&
|
|
!memcmp(&gid, ¤t_gid, sizeof(gid)) &&
|
|
!memcmp(&gid_attr, ¤t_gid_attr, sizeof(gid_attr)))
|
|
goto unlock;
|
|
|
|
if ((memcmp(¤t_gid, &zgid, sizeof(current_gid)) ||
|
|
memcmp(¤t_gid_attr, &zattr,
|
|
sizeof(current_gid_attr))) &&
|
|
del_gid(ib_dev, port, table, ix, true)) {
|
|
pr_warn("ib_cache_gid: can't delete index %d for default gid %pI6\n",
|
|
ix, gid.raw);
|
|
goto unlock;
|
|
}
|
|
|
|
if (mode == IB_CACHE_GID_DEFAULT_MODE_SET)
|
|
if (add_gid(ib_dev, port, table, ix, &gid, &gid_attr, true))
|
|
pr_warn("ib_cache_gid: unable to add default gid %pI6\n",
|
|
gid.raw);
|
|
|
|
unlock:
|
|
if (current_gid_attr.ndev)
|
|
dev_put(current_gid_attr.ndev);
|
|
mutex_unlock(&table->lock);
|
|
}
|
|
|
|
static int gid_table_reserve_default(struct ib_device *ib_dev, u8 port,
|
|
struct ib_gid_table *table)
|
|
{
|
|
if (rdma_protocol_roce(ib_dev, port)) {
|
|
struct ib_gid_table_entry *entry = &table->data_vec[0];
|
|
|
|
entry->props |= GID_TABLE_ENTRY_DEFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int _gid_table_setup_one(struct ib_device *ib_dev)
|
|
{
|
|
u8 port;
|
|
struct ib_gid_table **table;
|
|
int err = 0;
|
|
|
|
table = kcalloc(ib_dev->phys_port_cnt, sizeof(*table), GFP_KERNEL);
|
|
|
|
if (!table) {
|
|
pr_warn("failed to allocate ib gid cache for %s\n",
|
|
ib_dev->name);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
for (port = 0; port < ib_dev->phys_port_cnt; port++) {
|
|
u8 rdma_port = port + rdma_start_port(ib_dev);
|
|
|
|
table[port] =
|
|
alloc_gid_table(
|
|
ib_dev->port_immutable[rdma_port].gid_tbl_len);
|
|
if (!table[port]) {
|
|
err = -ENOMEM;
|
|
goto rollback_table_setup;
|
|
}
|
|
|
|
err = gid_table_reserve_default(ib_dev,
|
|
port + rdma_start_port(ib_dev),
|
|
table[port]);
|
|
if (err)
|
|
goto rollback_table_setup;
|
|
}
|
|
|
|
ib_dev->cache.gid_cache = table;
|
|
return 0;
|
|
|
|
rollback_table_setup:
|
|
for (port = 0; port < ib_dev->phys_port_cnt; port++) {
|
|
cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev),
|
|
table[port]);
|
|
release_gid_table(table[port]);
|
|
}
|
|
|
|
kfree(table);
|
|
return err;
|
|
}
|
|
|
|
static void gid_table_release_one(struct ib_device *ib_dev)
|
|
{
|
|
struct ib_gid_table **table = ib_dev->cache.gid_cache;
|
|
u8 port;
|
|
|
|
if (!table)
|
|
return;
|
|
|
|
for (port = 0; port < ib_dev->phys_port_cnt; port++)
|
|
release_gid_table(table[port]);
|
|
|
|
kfree(table);
|
|
ib_dev->cache.gid_cache = NULL;
|
|
}
|
|
|
|
static void gid_table_cleanup_one(struct ib_device *ib_dev)
|
|
{
|
|
struct ib_gid_table **table = ib_dev->cache.gid_cache;
|
|
u8 port;
|
|
|
|
if (!table)
|
|
return;
|
|
|
|
for (port = 0; port < ib_dev->phys_port_cnt; port++)
|
|
cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev),
|
|
table[port]);
|
|
}
|
|
|
|
static int gid_table_setup_one(struct ib_device *ib_dev)
|
|
{
|
|
int err;
|
|
|
|
err = _gid_table_setup_one(ib_dev);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
err = roce_rescan_device(ib_dev);
|
|
|
|
if (err) {
|
|
gid_table_cleanup_one(ib_dev);
|
|
gid_table_release_one(ib_dev);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
int ib_get_cached_gid(struct ib_device *device,
|
|
u8 port_num,
|
|
int index,
|
|
union ib_gid *gid,
|
|
struct ib_gid_attr *gid_attr)
|
|
{
|
|
if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
|
|
return -EINVAL;
|
|
|
|
return __ib_cache_gid_get(device, port_num, index, gid, gid_attr);
|
|
}
|
|
EXPORT_SYMBOL(ib_get_cached_gid);
|
|
|
|
int ib_find_cached_gid(struct ib_device *device,
|
|
const union ib_gid *gid,
|
|
struct net_device *ndev,
|
|
u8 *port_num,
|
|
u16 *index)
|
|
{
|
|
return ib_cache_gid_find(device, gid, ndev, port_num, index);
|
|
}
|
|
EXPORT_SYMBOL(ib_find_cached_gid);
|
|
|
|
int ib_find_gid_by_filter(struct ib_device *device,
|
|
const union ib_gid *gid,
|
|
u8 port_num,
|
|
bool (*filter)(const union ib_gid *gid,
|
|
const struct ib_gid_attr *,
|
|
void *),
|
|
void *context, u16 *index)
|
|
{
|
|
/* Only RoCE GID table supports filter function */
|
|
if (!rdma_cap_roce_gid_table(device, port_num) && filter)
|
|
return -EPROTONOSUPPORT;
|
|
|
|
return ib_cache_gid_find_by_filter(device, gid,
|
|
port_num, filter,
|
|
context, index);
|
|
}
|
|
EXPORT_SYMBOL(ib_find_gid_by_filter);
|
|
|
|
int ib_get_cached_pkey(struct ib_device *device,
|
|
u8 port_num,
|
|
int index,
|
|
u16 *pkey)
|
|
{
|
|
struct ib_pkey_cache *cache;
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
|
|
return -EINVAL;
|
|
|
|
read_lock_irqsave(&device->cache.lock, flags);
|
|
|
|
cache = device->cache.pkey_cache[port_num - rdma_start_port(device)];
|
|
|
|
if (index < 0 || index >= cache->table_len)
|
|
ret = -EINVAL;
|
|
else
|
|
*pkey = cache->table[index];
|
|
|
|
read_unlock_irqrestore(&device->cache.lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_get_cached_pkey);
|
|
|
|
int ib_find_cached_pkey(struct ib_device *device,
|
|
u8 port_num,
|
|
u16 pkey,
|
|
u16 *index)
|
|
{
|
|
struct ib_pkey_cache *cache;
|
|
unsigned long flags;
|
|
int i;
|
|
int ret = -ENOENT;
|
|
int partial_ix = -1;
|
|
|
|
if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
|
|
return -EINVAL;
|
|
|
|
read_lock_irqsave(&device->cache.lock, flags);
|
|
|
|
cache = device->cache.pkey_cache[port_num - rdma_start_port(device)];
|
|
|
|
*index = -1;
|
|
|
|
for (i = 0; i < cache->table_len; ++i)
|
|
if ((cache->table[i] & 0x7fff) == (pkey & 0x7fff)) {
|
|
if (cache->table[i] & 0x8000) {
|
|
*index = i;
|
|
ret = 0;
|
|
break;
|
|
} else
|
|
partial_ix = i;
|
|
}
|
|
|
|
if (ret && partial_ix >= 0) {
|
|
*index = partial_ix;
|
|
ret = 0;
|
|
}
|
|
|
|
read_unlock_irqrestore(&device->cache.lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_find_cached_pkey);
|
|
|
|
int ib_find_exact_cached_pkey(struct ib_device *device,
|
|
u8 port_num,
|
|
u16 pkey,
|
|
u16 *index)
|
|
{
|
|
struct ib_pkey_cache *cache;
|
|
unsigned long flags;
|
|
int i;
|
|
int ret = -ENOENT;
|
|
|
|
if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
|
|
return -EINVAL;
|
|
|
|
read_lock_irqsave(&device->cache.lock, flags);
|
|
|
|
cache = device->cache.pkey_cache[port_num - rdma_start_port(device)];
|
|
|
|
*index = -1;
|
|
|
|
for (i = 0; i < cache->table_len; ++i)
|
|
if (cache->table[i] == pkey) {
|
|
*index = i;
|
|
ret = 0;
|
|
break;
|
|
}
|
|
|
|
read_unlock_irqrestore(&device->cache.lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_find_exact_cached_pkey);
|
|
|
|
int ib_get_cached_lmc(struct ib_device *device,
|
|
u8 port_num,
|
|
u8 *lmc)
|
|
{
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
if (port_num < rdma_start_port(device) || port_num > rdma_end_port(device))
|
|
return -EINVAL;
|
|
|
|
read_lock_irqsave(&device->cache.lock, flags);
|
|
*lmc = device->cache.lmc_cache[port_num - rdma_start_port(device)];
|
|
read_unlock_irqrestore(&device->cache.lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_get_cached_lmc);
|
|
|
|
static void ib_cache_update(struct ib_device *device,
|
|
u8 port)
|
|
{
|
|
struct ib_port_attr *tprops = NULL;
|
|
struct ib_pkey_cache *pkey_cache = NULL, *old_pkey_cache;
|
|
struct ib_gid_cache {
|
|
int table_len;
|
|
union ib_gid table[0];
|
|
} *gid_cache = NULL;
|
|
int i;
|
|
int ret;
|
|
struct ib_gid_table *table;
|
|
struct ib_gid_table **ports_table = device->cache.gid_cache;
|
|
bool use_roce_gid_table =
|
|
rdma_cap_roce_gid_table(device, port);
|
|
|
|
if (port < rdma_start_port(device) || port > rdma_end_port(device))
|
|
return;
|
|
|
|
table = ports_table[port - rdma_start_port(device)];
|
|
|
|
tprops = kmalloc(sizeof *tprops, GFP_KERNEL);
|
|
if (!tprops)
|
|
return;
|
|
|
|
ret = ib_query_port(device, port, tprops);
|
|
if (ret) {
|
|
printk(KERN_WARNING "ib_query_port failed (%d) for %s\n",
|
|
ret, device->name);
|
|
goto err;
|
|
}
|
|
|
|
pkey_cache = kmalloc(sizeof *pkey_cache + tprops->pkey_tbl_len *
|
|
sizeof *pkey_cache->table, GFP_KERNEL);
|
|
if (!pkey_cache)
|
|
goto err;
|
|
|
|
pkey_cache->table_len = tprops->pkey_tbl_len;
|
|
|
|
if (!use_roce_gid_table) {
|
|
gid_cache = kmalloc(sizeof(*gid_cache) + tprops->gid_tbl_len *
|
|
sizeof(*gid_cache->table), GFP_KERNEL);
|
|
if (!gid_cache)
|
|
goto err;
|
|
|
|
gid_cache->table_len = tprops->gid_tbl_len;
|
|
}
|
|
|
|
for (i = 0; i < pkey_cache->table_len; ++i) {
|
|
ret = ib_query_pkey(device, port, i, pkey_cache->table + i);
|
|
if (ret) {
|
|
printk(KERN_WARNING "ib_query_pkey failed (%d) for %s (index %d)\n",
|
|
ret, device->name, i);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
if (!use_roce_gid_table) {
|
|
for (i = 0; i < gid_cache->table_len; ++i) {
|
|
ret = ib_query_gid(device, port, i,
|
|
gid_cache->table + i, NULL);
|
|
if (ret) {
|
|
printk(KERN_WARNING "ib_query_gid failed (%d) for %s (index %d)\n",
|
|
ret, device->name, i);
|
|
goto err;
|
|
}
|
|
}
|
|
}
|
|
|
|
write_lock_irq(&device->cache.lock);
|
|
|
|
old_pkey_cache = device->cache.pkey_cache[port - rdma_start_port(device)];
|
|
|
|
device->cache.pkey_cache[port - rdma_start_port(device)] = pkey_cache;
|
|
if (!use_roce_gid_table) {
|
|
for (i = 0; i < gid_cache->table_len; i++) {
|
|
modify_gid(device, port, table, i, gid_cache->table + i,
|
|
&zattr, false);
|
|
}
|
|
}
|
|
|
|
device->cache.lmc_cache[port - rdma_start_port(device)] = tprops->lmc;
|
|
|
|
write_unlock_irq(&device->cache.lock);
|
|
|
|
kfree(gid_cache);
|
|
kfree(old_pkey_cache);
|
|
kfree(tprops);
|
|
return;
|
|
|
|
err:
|
|
kfree(pkey_cache);
|
|
kfree(gid_cache);
|
|
kfree(tprops);
|
|
}
|
|
|
|
static void ib_cache_task(struct work_struct *_work)
|
|
{
|
|
struct ib_update_work *work =
|
|
container_of(_work, struct ib_update_work, work);
|
|
|
|
ib_cache_update(work->device, work->port_num);
|
|
kfree(work);
|
|
}
|
|
|
|
static void ib_cache_event(struct ib_event_handler *handler,
|
|
struct ib_event *event)
|
|
{
|
|
struct ib_update_work *work;
|
|
|
|
if (event->event == IB_EVENT_PORT_ERR ||
|
|
event->event == IB_EVENT_PORT_ACTIVE ||
|
|
event->event == IB_EVENT_LID_CHANGE ||
|
|
event->event == IB_EVENT_PKEY_CHANGE ||
|
|
event->event == IB_EVENT_SM_CHANGE ||
|
|
event->event == IB_EVENT_CLIENT_REREGISTER ||
|
|
event->event == IB_EVENT_GID_CHANGE) {
|
|
work = kmalloc(sizeof *work, GFP_ATOMIC);
|
|
if (work) {
|
|
INIT_WORK(&work->work, ib_cache_task);
|
|
work->device = event->device;
|
|
work->port_num = event->element.port_num;
|
|
queue_work(ib_wq, &work->work);
|
|
}
|
|
}
|
|
}
|
|
|
|
int ib_cache_setup_one(struct ib_device *device)
|
|
{
|
|
int p;
|
|
int err;
|
|
|
|
rwlock_init(&device->cache.lock);
|
|
|
|
device->cache.pkey_cache =
|
|
kzalloc(sizeof *device->cache.pkey_cache *
|
|
(rdma_end_port(device) - rdma_start_port(device) + 1), GFP_KERNEL);
|
|
device->cache.lmc_cache = kmalloc(sizeof *device->cache.lmc_cache *
|
|
(rdma_end_port(device) -
|
|
rdma_start_port(device) + 1),
|
|
GFP_KERNEL);
|
|
if (!device->cache.pkey_cache ||
|
|
!device->cache.lmc_cache) {
|
|
printk(KERN_WARNING "Couldn't allocate cache "
|
|
"for %s\n", device->name);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
err = gid_table_setup_one(device);
|
|
if (err)
|
|
/* Allocated memory will be cleaned in the release function */
|
|
return err;
|
|
|
|
for (p = 0; p <= rdma_end_port(device) - rdma_start_port(device); ++p)
|
|
ib_cache_update(device, p + rdma_start_port(device));
|
|
|
|
INIT_IB_EVENT_HANDLER(&device->cache.event_handler,
|
|
device, ib_cache_event);
|
|
err = ib_register_event_handler(&device->cache.event_handler);
|
|
if (err)
|
|
goto err;
|
|
|
|
return 0;
|
|
|
|
err:
|
|
gid_table_cleanup_one(device);
|
|
return err;
|
|
}
|
|
|
|
void ib_cache_release_one(struct ib_device *device)
|
|
{
|
|
int p;
|
|
|
|
/*
|
|
* The release function frees all the cache elements.
|
|
* This function should be called as part of freeing
|
|
* all the device's resources when the cache could no
|
|
* longer be accessed.
|
|
*/
|
|
if (device->cache.pkey_cache)
|
|
for (p = 0;
|
|
p <= rdma_end_port(device) - rdma_start_port(device); ++p)
|
|
kfree(device->cache.pkey_cache[p]);
|
|
|
|
gid_table_release_one(device);
|
|
kfree(device->cache.pkey_cache);
|
|
kfree(device->cache.lmc_cache);
|
|
}
|
|
|
|
void ib_cache_cleanup_one(struct ib_device *device)
|
|
{
|
|
/* The cleanup function unregisters the event handler,
|
|
* waits for all in-progress workqueue elements and cleans
|
|
* up the GID cache. This function should be called after
|
|
* the device was removed from the devices list and all
|
|
* clients were removed, so the cache exists but is
|
|
* non-functional and shouldn't be updated anymore.
|
|
*/
|
|
ib_unregister_event_handler(&device->cache.event_handler);
|
|
flush_workqueue(ib_wq);
|
|
gid_table_cleanup_one(device);
|
|
}
|
|
|
|
void __init ib_cache_setup(void)
|
|
{
|
|
roce_gid_mgmt_init();
|
|
}
|
|
|
|
void __exit ib_cache_cleanup(void)
|
|
{
|
|
roce_gid_mgmt_cleanup();
|
|
}
|