1684 lines
43 KiB
C
1684 lines
43 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/if_vlan.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[];
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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_event event;
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bool enforce_security;
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};
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union ib_gid zgid;
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EXPORT_SYMBOL(zgid);
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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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GID_ATTR_FIND_MASK_GID_TYPE = 1UL << 3,
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};
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enum gid_table_entry_state {
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GID_TABLE_ENTRY_INVALID = 1,
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GID_TABLE_ENTRY_VALID = 2,
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/*
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* Indicates that entry is pending to be removed, there may
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* be active users of this GID entry.
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* When last user of the GID entry releases reference to it,
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* GID entry is detached from the table.
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*/
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GID_TABLE_ENTRY_PENDING_DEL = 3,
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};
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struct roce_gid_ndev_storage {
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struct rcu_head rcu_head;
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struct net_device *ndev;
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};
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struct ib_gid_table_entry {
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struct kref kref;
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struct work_struct del_work;
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struct ib_gid_attr attr;
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void *context;
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/* Store the ndev pointer to release reference later on in
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* call_rcu context because by that time gid_table_entry
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* and attr might be already freed. So keep a copy of it.
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* ndev_storage is freed by rcu callback.
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*/
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struct roce_gid_ndev_storage *ndev_storage;
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enum gid_table_entry_state state;
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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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**/
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/* Any writer to data_vec must hold this lock and the write side of
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* rwlock. Readers must hold only rwlock. All writers must be in a
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* sleepable context.
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*/
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struct mutex lock;
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/* rwlock protects data_vec[ix]->state and entry pointer.
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*/
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rwlock_t rwlock;
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struct ib_gid_table_entry **data_vec;
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/* bit field, each bit indicates the index of default GID */
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u32 default_gid_indices;
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};
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static void dispatch_gid_change_event(struct ib_device *ib_dev, u32 port)
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{
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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_clients(&event);
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}
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static const char * const gid_type_str[] = {
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/* IB/RoCE v1 value is set for IB_GID_TYPE_IB and IB_GID_TYPE_ROCE for
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* user space compatibility reasons.
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*/
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[IB_GID_TYPE_IB] = "IB/RoCE v1",
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[IB_GID_TYPE_ROCE] = "IB/RoCE v1",
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[IB_GID_TYPE_ROCE_UDP_ENCAP] = "RoCE v2",
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};
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const char *ib_cache_gid_type_str(enum ib_gid_type gid_type)
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{
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if (gid_type < ARRAY_SIZE(gid_type_str) && gid_type_str[gid_type])
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return gid_type_str[gid_type];
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return "Invalid GID type";
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}
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EXPORT_SYMBOL(ib_cache_gid_type_str);
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/** rdma_is_zero_gid - Check if given GID is zero or not.
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* @gid: GID to check
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* Returns true if given GID is zero, returns false otherwise.
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*/
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bool rdma_is_zero_gid(const union ib_gid *gid)
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{
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return !memcmp(gid, &zgid, sizeof(*gid));
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}
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EXPORT_SYMBOL(rdma_is_zero_gid);
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/** is_gid_index_default - Check if a given index belongs to
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* reserved default GIDs or not.
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* @table: GID table pointer
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* @index: Index to check in GID table
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* Returns true if index is one of the reserved default GID index otherwise
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* returns false.
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*/
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static bool is_gid_index_default(const struct ib_gid_table *table,
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unsigned int index)
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{
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return index < 32 && (BIT(index) & table->default_gid_indices);
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}
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int ib_cache_gid_parse_type_str(const char *buf)
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{
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unsigned int i;
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size_t len;
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int err = -EINVAL;
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len = strlen(buf);
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if (len == 0)
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return -EINVAL;
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if (buf[len - 1] == '\n')
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len--;
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for (i = 0; i < ARRAY_SIZE(gid_type_str); ++i)
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if (gid_type_str[i] && !strncmp(buf, gid_type_str[i], len) &&
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len == strlen(gid_type_str[i])) {
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err = i;
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break;
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}
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return err;
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}
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EXPORT_SYMBOL(ib_cache_gid_parse_type_str);
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static struct ib_gid_table *rdma_gid_table(struct ib_device *device, u32 port)
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{
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return device->port_data[port].cache.gid;
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}
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static bool is_gid_entry_free(const struct ib_gid_table_entry *entry)
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{
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return !entry;
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}
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static bool is_gid_entry_valid(const struct ib_gid_table_entry *entry)
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{
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return entry && entry->state == GID_TABLE_ENTRY_VALID;
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}
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static void schedule_free_gid(struct kref *kref)
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{
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struct ib_gid_table_entry *entry =
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container_of(kref, struct ib_gid_table_entry, kref);
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queue_work(ib_wq, &entry->del_work);
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}
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static void put_gid_ndev(struct rcu_head *head)
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{
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struct roce_gid_ndev_storage *storage =
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container_of(head, struct roce_gid_ndev_storage, rcu_head);
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WARN_ON(!storage->ndev);
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/* At this point its safe to release netdev reference,
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* as all callers working on gid_attr->ndev are done
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* using this netdev.
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*/
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dev_put(storage->ndev);
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kfree(storage);
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}
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static void free_gid_entry_locked(struct ib_gid_table_entry *entry)
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{
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struct ib_device *device = entry->attr.device;
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u32 port_num = entry->attr.port_num;
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struct ib_gid_table *table = rdma_gid_table(device, port_num);
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dev_dbg(&device->dev, "%s port=%u index=%u gid %pI6\n", __func__,
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port_num, entry->attr.index, entry->attr.gid.raw);
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write_lock_irq(&table->rwlock);
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/*
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* The only way to avoid overwriting NULL in table is
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* by comparing if it is same entry in table or not!
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* If new entry in table is added by the time we free here,
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* don't overwrite the table entry.
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*/
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if (entry == table->data_vec[entry->attr.index])
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table->data_vec[entry->attr.index] = NULL;
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/* Now this index is ready to be allocated */
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write_unlock_irq(&table->rwlock);
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if (entry->ndev_storage)
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call_rcu(&entry->ndev_storage->rcu_head, put_gid_ndev);
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kfree(entry);
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}
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static void free_gid_entry(struct kref *kref)
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{
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struct ib_gid_table_entry *entry =
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container_of(kref, struct ib_gid_table_entry, kref);
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free_gid_entry_locked(entry);
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}
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/**
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* free_gid_work - Release reference to the GID entry
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* @work: Work structure to refer to GID entry which needs to be
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* deleted.
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*
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* free_gid_work() frees the entry from the HCA's hardware table
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* if provider supports it. It releases reference to netdevice.
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*/
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static void free_gid_work(struct work_struct *work)
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{
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struct ib_gid_table_entry *entry =
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container_of(work, struct ib_gid_table_entry, del_work);
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struct ib_device *device = entry->attr.device;
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u32 port_num = entry->attr.port_num;
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struct ib_gid_table *table = rdma_gid_table(device, port_num);
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mutex_lock(&table->lock);
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free_gid_entry_locked(entry);
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mutex_unlock(&table->lock);
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}
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static struct ib_gid_table_entry *
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alloc_gid_entry(const struct ib_gid_attr *attr)
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{
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struct ib_gid_table_entry *entry;
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struct net_device *ndev;
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entry = kzalloc(sizeof(*entry), GFP_KERNEL);
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if (!entry)
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return NULL;
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ndev = rcu_dereference_protected(attr->ndev, 1);
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if (ndev) {
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entry->ndev_storage = kzalloc(sizeof(*entry->ndev_storage),
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GFP_KERNEL);
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if (!entry->ndev_storage) {
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kfree(entry);
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return NULL;
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}
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dev_hold(ndev);
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entry->ndev_storage->ndev = ndev;
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}
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kref_init(&entry->kref);
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memcpy(&entry->attr, attr, sizeof(*attr));
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INIT_WORK(&entry->del_work, free_gid_work);
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entry->state = GID_TABLE_ENTRY_INVALID;
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return entry;
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}
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static void store_gid_entry(struct ib_gid_table *table,
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struct ib_gid_table_entry *entry)
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{
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entry->state = GID_TABLE_ENTRY_VALID;
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dev_dbg(&entry->attr.device->dev, "%s port=%u index=%u gid %pI6\n",
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__func__, entry->attr.port_num, entry->attr.index,
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entry->attr.gid.raw);
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lockdep_assert_held(&table->lock);
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write_lock_irq(&table->rwlock);
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table->data_vec[entry->attr.index] = entry;
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write_unlock_irq(&table->rwlock);
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}
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static void get_gid_entry(struct ib_gid_table_entry *entry)
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{
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kref_get(&entry->kref);
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}
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static void put_gid_entry(struct ib_gid_table_entry *entry)
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{
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kref_put(&entry->kref, schedule_free_gid);
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}
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static void put_gid_entry_locked(struct ib_gid_table_entry *entry)
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{
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kref_put(&entry->kref, free_gid_entry);
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}
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static int add_roce_gid(struct ib_gid_table_entry *entry)
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{
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const struct ib_gid_attr *attr = &entry->attr;
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int ret;
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if (!attr->ndev) {
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dev_err(&attr->device->dev, "%s NULL netdev port=%u index=%u\n",
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__func__, attr->port_num, attr->index);
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return -EINVAL;
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}
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if (rdma_cap_roce_gid_table(attr->device, attr->port_num)) {
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ret = attr->device->ops.add_gid(attr, &entry->context);
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if (ret) {
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dev_err(&attr->device->dev,
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"%s GID add failed port=%u index=%u\n",
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__func__, attr->port_num, attr->index);
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return ret;
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}
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}
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return 0;
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}
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/**
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* del_gid - Delete GID table entry
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*
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* @ib_dev: IB device whose GID entry to be deleted
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* @port: Port number of the IB device
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* @table: GID table of the IB device for a port
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* @ix: GID entry index to delete
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*
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*/
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static void del_gid(struct ib_device *ib_dev, u32 port,
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struct ib_gid_table *table, int ix)
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{
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struct roce_gid_ndev_storage *ndev_storage;
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struct ib_gid_table_entry *entry;
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lockdep_assert_held(&table->lock);
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dev_dbg(&ib_dev->dev, "%s port=%u index=%d gid %pI6\n", __func__, port,
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ix, table->data_vec[ix]->attr.gid.raw);
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write_lock_irq(&table->rwlock);
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entry = table->data_vec[ix];
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entry->state = GID_TABLE_ENTRY_PENDING_DEL;
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/*
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* For non RoCE protocol, GID entry slot is ready to use.
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*/
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if (!rdma_protocol_roce(ib_dev, port))
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table->data_vec[ix] = NULL;
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write_unlock_irq(&table->rwlock);
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if (rdma_cap_roce_gid_table(ib_dev, port))
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ib_dev->ops.del_gid(&entry->attr, &entry->context);
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ndev_storage = entry->ndev_storage;
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if (ndev_storage) {
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entry->ndev_storage = NULL;
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rcu_assign_pointer(entry->attr.ndev, NULL);
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call_rcu(&ndev_storage->rcu_head, put_gid_ndev);
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}
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put_gid_entry_locked(entry);
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}
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/**
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* add_modify_gid - Add or modify GID table entry
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*
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* @table: GID table in which GID to be added or modified
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* @attr: Attributes of the GID
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*
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* Returns 0 on success or appropriate error code. It accepts zero
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* GID addition for non RoCE ports for HCA's who report them as valid
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* GID. However such zero GIDs are not added to the cache.
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*/
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static int add_modify_gid(struct ib_gid_table *table,
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const struct ib_gid_attr *attr)
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{
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struct ib_gid_table_entry *entry;
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int ret = 0;
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/*
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* Invalidate any old entry in the table to make it safe to write to
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* this index.
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*/
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if (is_gid_entry_valid(table->data_vec[attr->index]))
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del_gid(attr->device, attr->port_num, table, attr->index);
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|
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/*
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* Some HCA's report multiple GID entries with only one valid GID, and
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* leave other unused entries as the zero GID. Convert zero GIDs to
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* empty table entries instead of storing them.
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*/
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if (rdma_is_zero_gid(&attr->gid))
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return 0;
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entry = alloc_gid_entry(attr);
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if (!entry)
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return -ENOMEM;
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|
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if (rdma_protocol_roce(attr->device, attr->port_num)) {
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ret = add_roce_gid(entry);
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if (ret)
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goto done;
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}
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store_gid_entry(table, entry);
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return 0;
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done:
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put_gid_entry(entry);
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return ret;
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}
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|
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/* rwlock should be read locked, or lock should be held */
|
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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, int *pempty)
|
|
{
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int i = 0;
|
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int found = -1;
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int empty = pempty ? -1 : 0;
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while (i < table->sz && (found < 0 || empty < 0)) {
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struct ib_gid_table_entry *data = table->data_vec[i];
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struct ib_gid_attr *attr;
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int curr_index = i;
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i++;
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|
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/* find_gid() is used during GID addition where it is expected
|
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* to return a free entry slot which is not duplicate.
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* Free entry slot is requested and returned if pempty is set,
|
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* so lookup free slot only if requested.
|
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*/
|
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if (pempty && empty < 0) {
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if (is_gid_entry_free(data) &&
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default_gid ==
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is_gid_index_default(table, curr_index)) {
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/*
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* Found an invalid (free) entry; allocate it.
|
|
* If default GID is requested, then our
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* found slot must be one of the DEFAULT
|
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* reserved slots or we fail.
|
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* This ensures that only DEFAULT reserved
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* slots are used for default property GIDs.
|
|
*/
|
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empty = curr_index;
|
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}
|
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}
|
|
|
|
/*
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|
* Additionally find_gid() is used to find valid entry during
|
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* lookup operation; so ignore the entries which are marked as
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* pending for removal and the entries which are marked as
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* invalid.
|
|
*/
|
|
if (!is_gid_entry_valid(data))
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continue;
|
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|
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if (found >= 0)
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continue;
|
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|
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attr = &data->attr;
|
|
if (mask & GID_ATTR_FIND_MASK_GID_TYPE &&
|
|
attr->gid_type != val->gid_type)
|
|
continue;
|
|
|
|
if (mask & GID_ATTR_FIND_MASK_GID &&
|
|
memcmp(gid, &data->attr.gid, sizeof(*gid)))
|
|
continue;
|
|
|
|
if (mask & GID_ATTR_FIND_MASK_NETDEV &&
|
|
attr->ndev != val->ndev)
|
|
continue;
|
|
|
|
if (mask & GID_ATTR_FIND_MASK_DEFAULT &&
|
|
is_gid_index_default(table, curr_index) != default_gid)
|
|
continue;
|
|
|
|
found = curr_index;
|
|
}
|
|
|
|
if (pempty)
|
|
*pempty = empty;
|
|
|
|
return found;
|
|
}
|
|
|
|
static void make_default_gid(struct net_device *dev, union ib_gid *gid)
|
|
{
|
|
gid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
|
|
addrconf_ifid_eui48(&gid->raw[8], dev);
|
|
}
|
|
|
|
static int __ib_cache_gid_add(struct ib_device *ib_dev, u32 port,
|
|
union ib_gid *gid, struct ib_gid_attr *attr,
|
|
unsigned long mask, bool default_gid)
|
|
{
|
|
struct ib_gid_table *table;
|
|
int ret = 0;
|
|
int empty;
|
|
int ix;
|
|
|
|
/* Do not allow adding zero GID in support of
|
|
* IB spec version 1.3 section 4.1.1 point (6) and
|
|
* section 12.7.10 and section 12.7.20
|
|
*/
|
|
if (rdma_is_zero_gid(gid))
|
|
return -EINVAL;
|
|
|
|
table = rdma_gid_table(ib_dev, port);
|
|
|
|
mutex_lock(&table->lock);
|
|
|
|
ix = find_gid(table, gid, attr, default_gid, mask, &empty);
|
|
if (ix >= 0)
|
|
goto out_unlock;
|
|
|
|
if (empty < 0) {
|
|
ret = -ENOSPC;
|
|
goto out_unlock;
|
|
}
|
|
attr->device = ib_dev;
|
|
attr->index = empty;
|
|
attr->port_num = port;
|
|
attr->gid = *gid;
|
|
ret = add_modify_gid(table, attr);
|
|
if (!ret)
|
|
dispatch_gid_change_event(ib_dev, port);
|
|
|
|
out_unlock:
|
|
mutex_unlock(&table->lock);
|
|
if (ret)
|
|
pr_warn("%s: unable to add gid %pI6 error=%d\n",
|
|
__func__, gid->raw, ret);
|
|
return ret;
|
|
}
|
|
|
|
int ib_cache_gid_add(struct ib_device *ib_dev, u32 port,
|
|
union ib_gid *gid, struct ib_gid_attr *attr)
|
|
{
|
|
unsigned long mask = GID_ATTR_FIND_MASK_GID |
|
|
GID_ATTR_FIND_MASK_GID_TYPE |
|
|
GID_ATTR_FIND_MASK_NETDEV;
|
|
|
|
return __ib_cache_gid_add(ib_dev, port, gid, attr, mask, false);
|
|
}
|
|
|
|
static int
|
|
_ib_cache_gid_del(struct ib_device *ib_dev, u32 port,
|
|
union ib_gid *gid, struct ib_gid_attr *attr,
|
|
unsigned long mask, bool default_gid)
|
|
{
|
|
struct ib_gid_table *table;
|
|
int ret = 0;
|
|
int ix;
|
|
|
|
table = rdma_gid_table(ib_dev, port);
|
|
|
|
mutex_lock(&table->lock);
|
|
|
|
ix = find_gid(table, gid, attr, default_gid, mask, NULL);
|
|
if (ix < 0) {
|
|
ret = -EINVAL;
|
|
goto out_unlock;
|
|
}
|
|
|
|
del_gid(ib_dev, port, table, ix);
|
|
dispatch_gid_change_event(ib_dev, port);
|
|
|
|
out_unlock:
|
|
mutex_unlock(&table->lock);
|
|
if (ret)
|
|
pr_debug("%s: can't delete gid %pI6 error=%d\n",
|
|
__func__, gid->raw, ret);
|
|
return ret;
|
|
}
|
|
|
|
int ib_cache_gid_del(struct ib_device *ib_dev, u32 port,
|
|
union ib_gid *gid, struct ib_gid_attr *attr)
|
|
{
|
|
unsigned long mask = GID_ATTR_FIND_MASK_GID |
|
|
GID_ATTR_FIND_MASK_GID_TYPE |
|
|
GID_ATTR_FIND_MASK_DEFAULT |
|
|
GID_ATTR_FIND_MASK_NETDEV;
|
|
|
|
return _ib_cache_gid_del(ib_dev, port, gid, attr, mask, false);
|
|
}
|
|
|
|
int ib_cache_gid_del_all_netdev_gids(struct ib_device *ib_dev, u32 port,
|
|
struct net_device *ndev)
|
|
{
|
|
struct ib_gid_table *table;
|
|
int ix;
|
|
bool deleted = false;
|
|
|
|
table = rdma_gid_table(ib_dev, port);
|
|
|
|
mutex_lock(&table->lock);
|
|
|
|
for (ix = 0; ix < table->sz; ix++) {
|
|
if (is_gid_entry_valid(table->data_vec[ix]) &&
|
|
table->data_vec[ix]->attr.ndev == ndev) {
|
|
del_gid(ib_dev, port, table, ix);
|
|
deleted = true;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&table->lock);
|
|
|
|
if (deleted)
|
|
dispatch_gid_change_event(ib_dev, port);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* rdma_find_gid_by_port - Returns the GID entry attributes when it finds
|
|
* a valid GID entry for given search parameters. It searches for the specified
|
|
* GID value in the local software cache.
|
|
* @ib_dev: The device to query.
|
|
* @gid: The GID value to search for.
|
|
* @gid_type: The GID type to search for.
|
|
* @port: The port number of the device where the GID value should be searched.
|
|
* @ndev: In RoCE, the net device of the device. NULL means ignore.
|
|
*
|
|
* Returns sgid attributes if the GID is found with valid reference or
|
|
* returns ERR_PTR for the error.
|
|
* The caller must invoke rdma_put_gid_attr() to release the reference.
|
|
*/
|
|
const struct ib_gid_attr *
|
|
rdma_find_gid_by_port(struct ib_device *ib_dev,
|
|
const union ib_gid *gid,
|
|
enum ib_gid_type gid_type,
|
|
u32 port, struct net_device *ndev)
|
|
{
|
|
int local_index;
|
|
struct ib_gid_table *table;
|
|
unsigned long mask = GID_ATTR_FIND_MASK_GID |
|
|
GID_ATTR_FIND_MASK_GID_TYPE;
|
|
struct ib_gid_attr val = {.ndev = ndev, .gid_type = gid_type};
|
|
const struct ib_gid_attr *attr;
|
|
unsigned long flags;
|
|
|
|
if (!rdma_is_port_valid(ib_dev, port))
|
|
return ERR_PTR(-ENOENT);
|
|
|
|
table = rdma_gid_table(ib_dev, port);
|
|
|
|
if (ndev)
|
|
mask |= GID_ATTR_FIND_MASK_NETDEV;
|
|
|
|
read_lock_irqsave(&table->rwlock, flags);
|
|
local_index = find_gid(table, gid, &val, false, mask, NULL);
|
|
if (local_index >= 0) {
|
|
get_gid_entry(table->data_vec[local_index]);
|
|
attr = &table->data_vec[local_index]->attr;
|
|
read_unlock_irqrestore(&table->rwlock, flags);
|
|
return attr;
|
|
}
|
|
|
|
read_unlock_irqrestore(&table->rwlock, flags);
|
|
return ERR_PTR(-ENOENT);
|
|
}
|
|
EXPORT_SYMBOL(rdma_find_gid_by_port);
|
|
|
|
/**
|
|
* rdma_find_gid_by_filter - Returns the GID table attribute where a
|
|
* specified GID value occurs
|
|
* @ib_dev: The device to query.
|
|
* @gid: The GID value to search for.
|
|
* @port: The port number of the device where the GID value could be
|
|
* searched.
|
|
* @filter: The filter function is executed on any matching GID in the table.
|
|
* If the filter function returns true, the corresponding index is returned,
|
|
* otherwise, we continue searching the GID table. It's guaranteed that
|
|
* while filter is executed, ndev field is valid and the structure won't
|
|
* change. filter is executed in an atomic context. filter must not be NULL.
|
|
* @context: Private data to pass into the call-back.
|
|
*
|
|
* rdma_find_gid_by_filter() searches for the specified GID value
|
|
* of which the filter function returns true in the port's GID table.
|
|
*
|
|
*/
|
|
const struct ib_gid_attr *rdma_find_gid_by_filter(
|
|
struct ib_device *ib_dev, const union ib_gid *gid, u32 port,
|
|
bool (*filter)(const union ib_gid *gid, const struct ib_gid_attr *,
|
|
void *),
|
|
void *context)
|
|
{
|
|
const struct ib_gid_attr *res = ERR_PTR(-ENOENT);
|
|
struct ib_gid_table *table;
|
|
unsigned long flags;
|
|
unsigned int i;
|
|
|
|
if (!rdma_is_port_valid(ib_dev, port))
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
table = rdma_gid_table(ib_dev, port);
|
|
|
|
read_lock_irqsave(&table->rwlock, flags);
|
|
for (i = 0; i < table->sz; i++) {
|
|
struct ib_gid_table_entry *entry = table->data_vec[i];
|
|
|
|
if (!is_gid_entry_valid(entry))
|
|
continue;
|
|
|
|
if (memcmp(gid, &entry->attr.gid, sizeof(*gid)))
|
|
continue;
|
|
|
|
if (filter(gid, &entry->attr, context)) {
|
|
get_gid_entry(entry);
|
|
res = &entry->attr;
|
|
break;
|
|
}
|
|
}
|
|
read_unlock_irqrestore(&table->rwlock, flags);
|
|
return res;
|
|
}
|
|
|
|
static struct ib_gid_table *alloc_gid_table(int sz)
|
|
{
|
|
struct ib_gid_table *table = kzalloc(sizeof(*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;
|
|
rwlock_init(&table->rwlock);
|
|
return table;
|
|
|
|
err_free_table:
|
|
kfree(table);
|
|
return NULL;
|
|
}
|
|
|
|
static void release_gid_table(struct ib_device *device,
|
|
struct ib_gid_table *table)
|
|
{
|
|
int i;
|
|
|
|
if (!table)
|
|
return;
|
|
|
|
for (i = 0; i < table->sz; i++) {
|
|
if (is_gid_entry_free(table->data_vec[i]))
|
|
continue;
|
|
|
|
WARN_ONCE(true,
|
|
"GID entry ref leak for dev %s index %d ref=%u\n",
|
|
dev_name(&device->dev), i,
|
|
kref_read(&table->data_vec[i]->kref));
|
|
}
|
|
|
|
mutex_destroy(&table->lock);
|
|
kfree(table->data_vec);
|
|
kfree(table);
|
|
}
|
|
|
|
static void cleanup_gid_table_port(struct ib_device *ib_dev, u32 port,
|
|
struct ib_gid_table *table)
|
|
{
|
|
int i;
|
|
|
|
if (!table)
|
|
return;
|
|
|
|
mutex_lock(&table->lock);
|
|
for (i = 0; i < table->sz; ++i) {
|
|
if (is_gid_entry_valid(table->data_vec[i]))
|
|
del_gid(ib_dev, port, table, i);
|
|
}
|
|
mutex_unlock(&table->lock);
|
|
}
|
|
|
|
void ib_cache_gid_set_default_gid(struct ib_device *ib_dev, u32 port,
|
|
struct net_device *ndev,
|
|
unsigned long gid_type_mask,
|
|
enum ib_cache_gid_default_mode mode)
|
|
{
|
|
union ib_gid gid = { };
|
|
struct ib_gid_attr gid_attr;
|
|
unsigned int gid_type;
|
|
unsigned long mask;
|
|
|
|
mask = GID_ATTR_FIND_MASK_GID_TYPE |
|
|
GID_ATTR_FIND_MASK_DEFAULT |
|
|
GID_ATTR_FIND_MASK_NETDEV;
|
|
memset(&gid_attr, 0, sizeof(gid_attr));
|
|
gid_attr.ndev = ndev;
|
|
|
|
for (gid_type = 0; gid_type < IB_GID_TYPE_SIZE; ++gid_type) {
|
|
if (1UL << gid_type & ~gid_type_mask)
|
|
continue;
|
|
|
|
gid_attr.gid_type = gid_type;
|
|
|
|
if (mode == IB_CACHE_GID_DEFAULT_MODE_SET) {
|
|
make_default_gid(ndev, &gid);
|
|
__ib_cache_gid_add(ib_dev, port, &gid,
|
|
&gid_attr, mask, true);
|
|
} else if (mode == IB_CACHE_GID_DEFAULT_MODE_DELETE) {
|
|
_ib_cache_gid_del(ib_dev, port, &gid,
|
|
&gid_attr, mask, true);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void gid_table_reserve_default(struct ib_device *ib_dev, u32 port,
|
|
struct ib_gid_table *table)
|
|
{
|
|
unsigned int i;
|
|
unsigned long roce_gid_type_mask;
|
|
unsigned int num_default_gids;
|
|
|
|
roce_gid_type_mask = roce_gid_type_mask_support(ib_dev, port);
|
|
num_default_gids = hweight_long(roce_gid_type_mask);
|
|
/* Reserve starting indices for default GIDs */
|
|
for (i = 0; i < num_default_gids && i < table->sz; i++)
|
|
table->default_gid_indices |= BIT(i);
|
|
}
|
|
|
|
|
|
static void gid_table_release_one(struct ib_device *ib_dev)
|
|
{
|
|
u32 p;
|
|
|
|
rdma_for_each_port (ib_dev, p) {
|
|
release_gid_table(ib_dev, ib_dev->port_data[p].cache.gid);
|
|
ib_dev->port_data[p].cache.gid = NULL;
|
|
}
|
|
}
|
|
|
|
static int _gid_table_setup_one(struct ib_device *ib_dev)
|
|
{
|
|
struct ib_gid_table *table;
|
|
u32 rdma_port;
|
|
|
|
rdma_for_each_port (ib_dev, rdma_port) {
|
|
table = alloc_gid_table(
|
|
ib_dev->port_data[rdma_port].immutable.gid_tbl_len);
|
|
if (!table)
|
|
goto rollback_table_setup;
|
|
|
|
gid_table_reserve_default(ib_dev, rdma_port, table);
|
|
ib_dev->port_data[rdma_port].cache.gid = table;
|
|
}
|
|
return 0;
|
|
|
|
rollback_table_setup:
|
|
gid_table_release_one(ib_dev);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static void gid_table_cleanup_one(struct ib_device *ib_dev)
|
|
{
|
|
u32 p;
|
|
|
|
rdma_for_each_port (ib_dev, p)
|
|
cleanup_gid_table_port(ib_dev, p,
|
|
ib_dev->port_data[p].cache.gid);
|
|
}
|
|
|
|
static int gid_table_setup_one(struct ib_device *ib_dev)
|
|
{
|
|
int err;
|
|
|
|
err = _gid_table_setup_one(ib_dev);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
rdma_roce_rescan_device(ib_dev);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* rdma_query_gid - Read the GID content from the GID software cache
|
|
* @device: Device to query the GID
|
|
* @port_num: Port number of the device
|
|
* @index: Index of the GID table entry to read
|
|
* @gid: Pointer to GID where to store the entry's GID
|
|
*
|
|
* rdma_query_gid() only reads the GID entry content for requested device,
|
|
* port and index. It reads for IB, RoCE and iWarp link layers. It doesn't
|
|
* hold any reference to the GID table entry in the HCA or software cache.
|
|
*
|
|
* Returns 0 on success or appropriate error code.
|
|
*
|
|
*/
|
|
int rdma_query_gid(struct ib_device *device, u32 port_num,
|
|
int index, union ib_gid *gid)
|
|
{
|
|
struct ib_gid_table *table;
|
|
unsigned long flags;
|
|
int res;
|
|
|
|
if (!rdma_is_port_valid(device, port_num))
|
|
return -EINVAL;
|
|
|
|
table = rdma_gid_table(device, port_num);
|
|
read_lock_irqsave(&table->rwlock, flags);
|
|
|
|
if (index < 0 || index >= table->sz) {
|
|
res = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
if (!is_gid_entry_valid(table->data_vec[index])) {
|
|
res = -ENOENT;
|
|
goto done;
|
|
}
|
|
|
|
memcpy(gid, &table->data_vec[index]->attr.gid, sizeof(*gid));
|
|
res = 0;
|
|
|
|
done:
|
|
read_unlock_irqrestore(&table->rwlock, flags);
|
|
return res;
|
|
}
|
|
EXPORT_SYMBOL(rdma_query_gid);
|
|
|
|
/**
|
|
* rdma_read_gid_hw_context - Read the HW GID context from GID attribute
|
|
* @attr: Potinter to the GID attribute
|
|
*
|
|
* rdma_read_gid_hw_context() reads the drivers GID HW context corresponding
|
|
* to the SGID attr. Callers are required to already be holding the reference
|
|
* to an existing GID entry.
|
|
*
|
|
* Returns the HW GID context
|
|
*
|
|
*/
|
|
void *rdma_read_gid_hw_context(const struct ib_gid_attr *attr)
|
|
{
|
|
return container_of(attr, struct ib_gid_table_entry, attr)->context;
|
|
}
|
|
EXPORT_SYMBOL(rdma_read_gid_hw_context);
|
|
|
|
/**
|
|
* rdma_find_gid - Returns SGID attributes if the matching GID is found.
|
|
* @device: The device to query.
|
|
* @gid: The GID value to search for.
|
|
* @gid_type: The GID type to search for.
|
|
* @ndev: In RoCE, the net device of the device. NULL means ignore.
|
|
*
|
|
* rdma_find_gid() searches for the specified GID value in the software cache.
|
|
*
|
|
* Returns GID attributes if a valid GID is found or returns ERR_PTR for the
|
|
* error. The caller must invoke rdma_put_gid_attr() to release the reference.
|
|
*
|
|
*/
|
|
const struct ib_gid_attr *rdma_find_gid(struct ib_device *device,
|
|
const union ib_gid *gid,
|
|
enum ib_gid_type gid_type,
|
|
struct net_device *ndev)
|
|
{
|
|
unsigned long mask = GID_ATTR_FIND_MASK_GID |
|
|
GID_ATTR_FIND_MASK_GID_TYPE;
|
|
struct ib_gid_attr gid_attr_val = {.ndev = ndev, .gid_type = gid_type};
|
|
u32 p;
|
|
|
|
if (ndev)
|
|
mask |= GID_ATTR_FIND_MASK_NETDEV;
|
|
|
|
rdma_for_each_port(device, p) {
|
|
struct ib_gid_table *table;
|
|
unsigned long flags;
|
|
int index;
|
|
|
|
table = device->port_data[p].cache.gid;
|
|
read_lock_irqsave(&table->rwlock, flags);
|
|
index = find_gid(table, gid, &gid_attr_val, false, mask, NULL);
|
|
if (index >= 0) {
|
|
const struct ib_gid_attr *attr;
|
|
|
|
get_gid_entry(table->data_vec[index]);
|
|
attr = &table->data_vec[index]->attr;
|
|
read_unlock_irqrestore(&table->rwlock, flags);
|
|
return attr;
|
|
}
|
|
read_unlock_irqrestore(&table->rwlock, flags);
|
|
}
|
|
|
|
return ERR_PTR(-ENOENT);
|
|
}
|
|
EXPORT_SYMBOL(rdma_find_gid);
|
|
|
|
int ib_get_cached_pkey(struct ib_device *device,
|
|
u32 port_num,
|
|
int index,
|
|
u16 *pkey)
|
|
{
|
|
struct ib_pkey_cache *cache;
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
if (!rdma_is_port_valid(device, port_num))
|
|
return -EINVAL;
|
|
|
|
read_lock_irqsave(&device->cache_lock, flags);
|
|
|
|
cache = device->port_data[port_num].cache.pkey;
|
|
|
|
if (!cache || 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);
|
|
|
|
void ib_get_cached_subnet_prefix(struct ib_device *device, u32 port_num,
|
|
u64 *sn_pfx)
|
|
{
|
|
unsigned long flags;
|
|
|
|
read_lock_irqsave(&device->cache_lock, flags);
|
|
*sn_pfx = device->port_data[port_num].cache.subnet_prefix;
|
|
read_unlock_irqrestore(&device->cache_lock, flags);
|
|
}
|
|
EXPORT_SYMBOL(ib_get_cached_subnet_prefix);
|
|
|
|
int ib_find_cached_pkey(struct ib_device *device, u32 port_num,
|
|
u16 pkey, u16 *index)
|
|
{
|
|
struct ib_pkey_cache *cache;
|
|
unsigned long flags;
|
|
int i;
|
|
int ret = -ENOENT;
|
|
int partial_ix = -1;
|
|
|
|
if (!rdma_is_port_valid(device, port_num))
|
|
return -EINVAL;
|
|
|
|
read_lock_irqsave(&device->cache_lock, flags);
|
|
|
|
cache = device->port_data[port_num].cache.pkey;
|
|
if (!cache) {
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
*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;
|
|
}
|
|
|
|
err:
|
|
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, u32 port_num,
|
|
u16 pkey, u16 *index)
|
|
{
|
|
struct ib_pkey_cache *cache;
|
|
unsigned long flags;
|
|
int i;
|
|
int ret = -ENOENT;
|
|
|
|
if (!rdma_is_port_valid(device, port_num))
|
|
return -EINVAL;
|
|
|
|
read_lock_irqsave(&device->cache_lock, flags);
|
|
|
|
cache = device->port_data[port_num].cache.pkey;
|
|
if (!cache) {
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
*index = -1;
|
|
|
|
for (i = 0; i < cache->table_len; ++i)
|
|
if (cache->table[i] == pkey) {
|
|
*index = i;
|
|
ret = 0;
|
|
break;
|
|
}
|
|
|
|
err:
|
|
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, u32 port_num, u8 *lmc)
|
|
{
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
if (!rdma_is_port_valid(device, port_num))
|
|
return -EINVAL;
|
|
|
|
read_lock_irqsave(&device->cache_lock, flags);
|
|
*lmc = device->port_data[port_num].cache.lmc;
|
|
read_unlock_irqrestore(&device->cache_lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_get_cached_lmc);
|
|
|
|
int ib_get_cached_port_state(struct ib_device *device, u32 port_num,
|
|
enum ib_port_state *port_state)
|
|
{
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
if (!rdma_is_port_valid(device, port_num))
|
|
return -EINVAL;
|
|
|
|
read_lock_irqsave(&device->cache_lock, flags);
|
|
*port_state = device->port_data[port_num].cache.port_state;
|
|
read_unlock_irqrestore(&device->cache_lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_get_cached_port_state);
|
|
|
|
/**
|
|
* rdma_get_gid_attr - Returns GID attributes for a port of a device
|
|
* at a requested gid_index, if a valid GID entry exists.
|
|
* @device: The device to query.
|
|
* @port_num: The port number on the device where the GID value
|
|
* is to be queried.
|
|
* @index: Index of the GID table entry whose attributes are to
|
|
* be queried.
|
|
*
|
|
* rdma_get_gid_attr() acquires reference count of gid attributes from the
|
|
* cached GID table. Caller must invoke rdma_put_gid_attr() to release
|
|
* reference to gid attribute regardless of link layer.
|
|
*
|
|
* Returns pointer to valid gid attribute or ERR_PTR for the appropriate error
|
|
* code.
|
|
*/
|
|
const struct ib_gid_attr *
|
|
rdma_get_gid_attr(struct ib_device *device, u32 port_num, int index)
|
|
{
|
|
const struct ib_gid_attr *attr = ERR_PTR(-ENODATA);
|
|
struct ib_gid_table *table;
|
|
unsigned long flags;
|
|
|
|
if (!rdma_is_port_valid(device, port_num))
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
table = rdma_gid_table(device, port_num);
|
|
if (index < 0 || index >= table->sz)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
read_lock_irqsave(&table->rwlock, flags);
|
|
if (!is_gid_entry_valid(table->data_vec[index]))
|
|
goto done;
|
|
|
|
get_gid_entry(table->data_vec[index]);
|
|
attr = &table->data_vec[index]->attr;
|
|
done:
|
|
read_unlock_irqrestore(&table->rwlock, flags);
|
|
return attr;
|
|
}
|
|
EXPORT_SYMBOL(rdma_get_gid_attr);
|
|
|
|
/**
|
|
* rdma_query_gid_table - Reads GID table entries of all the ports of a device up to max_entries.
|
|
* @device: The device to query.
|
|
* @entries: Entries where GID entries are returned.
|
|
* @max_entries: Maximum number of entries that can be returned.
|
|
* Entries array must be allocated to hold max_entries number of entries.
|
|
*
|
|
* Returns number of entries on success or appropriate error code.
|
|
*/
|
|
ssize_t rdma_query_gid_table(struct ib_device *device,
|
|
struct ib_uverbs_gid_entry *entries,
|
|
size_t max_entries)
|
|
{
|
|
const struct ib_gid_attr *gid_attr;
|
|
ssize_t num_entries = 0, ret;
|
|
struct ib_gid_table *table;
|
|
u32 port_num, i;
|
|
struct net_device *ndev;
|
|
unsigned long flags;
|
|
|
|
rdma_for_each_port(device, port_num) {
|
|
table = rdma_gid_table(device, port_num);
|
|
read_lock_irqsave(&table->rwlock, flags);
|
|
for (i = 0; i < table->sz; i++) {
|
|
if (!is_gid_entry_valid(table->data_vec[i]))
|
|
continue;
|
|
if (num_entries >= max_entries) {
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
gid_attr = &table->data_vec[i]->attr;
|
|
|
|
memcpy(&entries->gid, &gid_attr->gid,
|
|
sizeof(gid_attr->gid));
|
|
entries->gid_index = gid_attr->index;
|
|
entries->port_num = gid_attr->port_num;
|
|
entries->gid_type = gid_attr->gid_type;
|
|
ndev = rcu_dereference_protected(
|
|
gid_attr->ndev,
|
|
lockdep_is_held(&table->rwlock));
|
|
if (ndev)
|
|
entries->netdev_ifindex = ndev->ifindex;
|
|
|
|
num_entries++;
|
|
entries++;
|
|
}
|
|
read_unlock_irqrestore(&table->rwlock, flags);
|
|
}
|
|
|
|
return num_entries;
|
|
err:
|
|
read_unlock_irqrestore(&table->rwlock, flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_query_gid_table);
|
|
|
|
/**
|
|
* rdma_put_gid_attr - Release reference to the GID attribute
|
|
* @attr: Pointer to the GID attribute whose reference
|
|
* needs to be released.
|
|
*
|
|
* rdma_put_gid_attr() must be used to release reference whose
|
|
* reference is acquired using rdma_get_gid_attr() or any APIs
|
|
* which returns a pointer to the ib_gid_attr regardless of link layer
|
|
* of IB or RoCE.
|
|
*
|
|
*/
|
|
void rdma_put_gid_attr(const struct ib_gid_attr *attr)
|
|
{
|
|
struct ib_gid_table_entry *entry =
|
|
container_of(attr, struct ib_gid_table_entry, attr);
|
|
|
|
put_gid_entry(entry);
|
|
}
|
|
EXPORT_SYMBOL(rdma_put_gid_attr);
|
|
|
|
/**
|
|
* rdma_hold_gid_attr - Get reference to existing GID attribute
|
|
*
|
|
* @attr: Pointer to the GID attribute whose reference
|
|
* needs to be taken.
|
|
*
|
|
* Increase the reference count to a GID attribute to keep it from being
|
|
* freed. Callers are required to already be holding a reference to attribute.
|
|
*
|
|
*/
|
|
void rdma_hold_gid_attr(const struct ib_gid_attr *attr)
|
|
{
|
|
struct ib_gid_table_entry *entry =
|
|
container_of(attr, struct ib_gid_table_entry, attr);
|
|
|
|
get_gid_entry(entry);
|
|
}
|
|
EXPORT_SYMBOL(rdma_hold_gid_attr);
|
|
|
|
/**
|
|
* rdma_read_gid_attr_ndev_rcu - Read GID attribute netdevice
|
|
* which must be in UP state.
|
|
*
|
|
* @attr:Pointer to the GID attribute
|
|
*
|
|
* Returns pointer to netdevice if the netdevice was attached to GID and
|
|
* netdevice is in UP state. Caller must hold RCU lock as this API
|
|
* reads the netdev flags which can change while netdevice migrates to
|
|
* different net namespace. Returns ERR_PTR with error code otherwise.
|
|
*
|
|
*/
|
|
struct net_device *rdma_read_gid_attr_ndev_rcu(const struct ib_gid_attr *attr)
|
|
{
|
|
struct ib_gid_table_entry *entry =
|
|
container_of(attr, struct ib_gid_table_entry, attr);
|
|
struct ib_device *device = entry->attr.device;
|
|
struct net_device *ndev = ERR_PTR(-EINVAL);
|
|
u32 port_num = entry->attr.port_num;
|
|
struct ib_gid_table *table;
|
|
unsigned long flags;
|
|
bool valid;
|
|
|
|
table = rdma_gid_table(device, port_num);
|
|
|
|
read_lock_irqsave(&table->rwlock, flags);
|
|
valid = is_gid_entry_valid(table->data_vec[attr->index]);
|
|
if (valid) {
|
|
ndev = rcu_dereference(attr->ndev);
|
|
if (!ndev)
|
|
ndev = ERR_PTR(-ENODEV);
|
|
}
|
|
read_unlock_irqrestore(&table->rwlock, flags);
|
|
return ndev;
|
|
}
|
|
EXPORT_SYMBOL(rdma_read_gid_attr_ndev_rcu);
|
|
|
|
static int get_lower_dev_vlan(struct net_device *lower_dev,
|
|
struct netdev_nested_priv *priv)
|
|
{
|
|
u16 *vlan_id = (u16 *)priv->data;
|
|
|
|
if (is_vlan_dev(lower_dev))
|
|
*vlan_id = vlan_dev_vlan_id(lower_dev);
|
|
|
|
/* We are interested only in first level vlan device, so
|
|
* always return 1 to stop iterating over next level devices.
|
|
*/
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* rdma_read_gid_l2_fields - Read the vlan ID and source MAC address
|
|
* of a GID entry.
|
|
*
|
|
* @attr: GID attribute pointer whose L2 fields to be read
|
|
* @vlan_id: Pointer to vlan id to fill up if the GID entry has
|
|
* vlan id. It is optional.
|
|
* @smac: Pointer to smac to fill up for a GID entry. It is optional.
|
|
*
|
|
* rdma_read_gid_l2_fields() returns 0 on success and returns vlan id
|
|
* (if gid entry has vlan) and source MAC, or returns error.
|
|
*/
|
|
int rdma_read_gid_l2_fields(const struct ib_gid_attr *attr,
|
|
u16 *vlan_id, u8 *smac)
|
|
{
|
|
struct netdev_nested_priv priv = {
|
|
.data = (void *)vlan_id,
|
|
};
|
|
struct net_device *ndev;
|
|
|
|
rcu_read_lock();
|
|
ndev = rcu_dereference(attr->ndev);
|
|
if (!ndev) {
|
|
rcu_read_unlock();
|
|
return -ENODEV;
|
|
}
|
|
if (smac)
|
|
ether_addr_copy(smac, ndev->dev_addr);
|
|
if (vlan_id) {
|
|
*vlan_id = 0xffff;
|
|
if (is_vlan_dev(ndev)) {
|
|
*vlan_id = vlan_dev_vlan_id(ndev);
|
|
} else {
|
|
/* If the netdev is upper device and if it's lower
|
|
* device is vlan device, consider vlan id of
|
|
* the lower vlan device for this gid entry.
|
|
*/
|
|
netdev_walk_all_lower_dev_rcu(attr->ndev,
|
|
get_lower_dev_vlan, &priv);
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(rdma_read_gid_l2_fields);
|
|
|
|
static int config_non_roce_gid_cache(struct ib_device *device,
|
|
u32 port, struct ib_port_attr *tprops)
|
|
{
|
|
struct ib_gid_attr gid_attr = {};
|
|
struct ib_gid_table *table;
|
|
int ret = 0;
|
|
int i;
|
|
|
|
gid_attr.device = device;
|
|
gid_attr.port_num = port;
|
|
table = rdma_gid_table(device, port);
|
|
|
|
mutex_lock(&table->lock);
|
|
for (i = 0; i < tprops->gid_tbl_len; ++i) {
|
|
if (!device->ops.query_gid)
|
|
continue;
|
|
ret = device->ops.query_gid(device, port, i, &gid_attr.gid);
|
|
if (ret) {
|
|
dev_warn(&device->dev,
|
|
"query_gid failed (%d) for index %d\n", ret,
|
|
i);
|
|
goto err;
|
|
}
|
|
|
|
if (rdma_protocol_iwarp(device, port)) {
|
|
struct net_device *ndev;
|
|
|
|
ndev = ib_device_get_netdev(device, port);
|
|
if (!ndev)
|
|
continue;
|
|
RCU_INIT_POINTER(gid_attr.ndev, ndev);
|
|
dev_put(ndev);
|
|
}
|
|
|
|
gid_attr.index = i;
|
|
tprops->subnet_prefix =
|
|
be64_to_cpu(gid_attr.gid.global.subnet_prefix);
|
|
add_modify_gid(table, &gid_attr);
|
|
}
|
|
err:
|
|
mutex_unlock(&table->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
ib_cache_update(struct ib_device *device, u32 port, bool update_gids,
|
|
bool update_pkeys, bool enforce_security)
|
|
{
|
|
struct ib_port_attr *tprops = NULL;
|
|
struct ib_pkey_cache *pkey_cache = NULL;
|
|
struct ib_pkey_cache *old_pkey_cache = NULL;
|
|
int i;
|
|
int ret;
|
|
|
|
if (!rdma_is_port_valid(device, port))
|
|
return -EINVAL;
|
|
|
|
tprops = kmalloc(sizeof *tprops, GFP_KERNEL);
|
|
if (!tprops)
|
|
return -ENOMEM;
|
|
|
|
ret = ib_query_port(device, port, tprops);
|
|
if (ret) {
|
|
dev_warn(&device->dev, "ib_query_port failed (%d)\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
if (!rdma_protocol_roce(device, port) && update_gids) {
|
|
ret = config_non_roce_gid_cache(device, port,
|
|
tprops);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
|
|
update_pkeys &= !!tprops->pkey_tbl_len;
|
|
|
|
if (update_pkeys) {
|
|
pkey_cache = kmalloc(struct_size(pkey_cache, table,
|
|
tprops->pkey_tbl_len),
|
|
GFP_KERNEL);
|
|
if (!pkey_cache) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
pkey_cache->table_len = tprops->pkey_tbl_len;
|
|
|
|
for (i = 0; i < pkey_cache->table_len; ++i) {
|
|
ret = ib_query_pkey(device, port, i,
|
|
pkey_cache->table + i);
|
|
if (ret) {
|
|
dev_warn(&device->dev,
|
|
"ib_query_pkey failed (%d) for index %d\n",
|
|
ret, i);
|
|
goto err;
|
|
}
|
|
}
|
|
}
|
|
|
|
write_lock_irq(&device->cache_lock);
|
|
|
|
if (update_pkeys) {
|
|
old_pkey_cache = device->port_data[port].cache.pkey;
|
|
device->port_data[port].cache.pkey = pkey_cache;
|
|
}
|
|
device->port_data[port].cache.lmc = tprops->lmc;
|
|
device->port_data[port].cache.port_state = tprops->state;
|
|
|
|
device->port_data[port].cache.subnet_prefix = tprops->subnet_prefix;
|
|
write_unlock_irq(&device->cache_lock);
|
|
|
|
if (enforce_security)
|
|
ib_security_cache_change(device,
|
|
port,
|
|
tprops->subnet_prefix);
|
|
|
|
kfree(old_pkey_cache);
|
|
kfree(tprops);
|
|
return 0;
|
|
|
|
err:
|
|
kfree(pkey_cache);
|
|
kfree(tprops);
|
|
return ret;
|
|
}
|
|
|
|
static void ib_cache_event_task(struct work_struct *_work)
|
|
{
|
|
struct ib_update_work *work =
|
|
container_of(_work, struct ib_update_work, work);
|
|
int ret;
|
|
|
|
/* Before distributing the cache update event, first sync
|
|
* the cache.
|
|
*/
|
|
ret = ib_cache_update(work->event.device, work->event.element.port_num,
|
|
work->event.event == IB_EVENT_GID_CHANGE,
|
|
work->event.event == IB_EVENT_PKEY_CHANGE,
|
|
work->enforce_security);
|
|
|
|
/* GID event is notified already for individual GID entries by
|
|
* dispatch_gid_change_event(). Hence, notifiy for rest of the
|
|
* events.
|
|
*/
|
|
if (!ret && work->event.event != IB_EVENT_GID_CHANGE)
|
|
ib_dispatch_event_clients(&work->event);
|
|
|
|
kfree(work);
|
|
}
|
|
|
|
static void ib_generic_event_task(struct work_struct *_work)
|
|
{
|
|
struct ib_update_work *work =
|
|
container_of(_work, struct ib_update_work, work);
|
|
|
|
ib_dispatch_event_clients(&work->event);
|
|
kfree(work);
|
|
}
|
|
|
|
static bool is_cache_update_event(const struct ib_event *event)
|
|
{
|
|
return (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_CLIENT_REREGISTER ||
|
|
event->event == IB_EVENT_GID_CHANGE);
|
|
}
|
|
|
|
/**
|
|
* ib_dispatch_event - Dispatch an asynchronous event
|
|
* @event:Event to dispatch
|
|
*
|
|
* Low-level drivers must call ib_dispatch_event() to dispatch the
|
|
* event to all registered event handlers when an asynchronous event
|
|
* occurs.
|
|
*/
|
|
void ib_dispatch_event(const struct ib_event *event)
|
|
{
|
|
struct ib_update_work *work;
|
|
|
|
work = kzalloc(sizeof(*work), GFP_ATOMIC);
|
|
if (!work)
|
|
return;
|
|
|
|
if (is_cache_update_event(event))
|
|
INIT_WORK(&work->work, ib_cache_event_task);
|
|
else
|
|
INIT_WORK(&work->work, ib_generic_event_task);
|
|
|
|
work->event = *event;
|
|
if (event->event == IB_EVENT_PKEY_CHANGE ||
|
|
event->event == IB_EVENT_GID_CHANGE)
|
|
work->enforce_security = true;
|
|
|
|
queue_work(ib_wq, &work->work);
|
|
}
|
|
EXPORT_SYMBOL(ib_dispatch_event);
|
|
|
|
int ib_cache_setup_one(struct ib_device *device)
|
|
{
|
|
u32 p;
|
|
int err;
|
|
|
|
err = gid_table_setup_one(device);
|
|
if (err)
|
|
return err;
|
|
|
|
rdma_for_each_port (device, p) {
|
|
err = ib_cache_update(device, p, true, true, true);
|
|
if (err) {
|
|
gid_table_cleanup_one(device);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ib_cache_release_one(struct ib_device *device)
|
|
{
|
|
u32 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.
|
|
*/
|
|
rdma_for_each_port (device, p)
|
|
kfree(device->port_data[p].cache.pkey);
|
|
|
|
gid_table_release_one(device);
|
|
}
|
|
|
|
void ib_cache_cleanup_one(struct ib_device *device)
|
|
{
|
|
/* The cleanup function 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.
|
|
*/
|
|
flush_workqueue(ib_wq);
|
|
gid_table_cleanup_one(device);
|
|
|
|
/*
|
|
* Flush the wq second time for any pending GID delete work.
|
|
*/
|
|
flush_workqueue(ib_wq);
|
|
}
|