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1668 lines
42 KiB
1668 lines
42 KiB
/* |
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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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|
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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[]; |
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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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|
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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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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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|
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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: |
|
* (a) Find if this GID is already exists. |
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* (b) Find a free space. |
|
* (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 |
|
* (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 |
|
* 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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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 |
|
* user space compatibility reasons. |
|
*/ |
|
[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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if (gid_type < ARRAY_SIZE(gid_type_str) && gid_type_str[gid_type]) |
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return gid_type_str[gid_type]; |
|
|
|
return "Invalid GID type"; |
|
} |
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EXPORT_SYMBOL(ib_cache_gid_type_str); |
|
|
|
/** rdma_is_zero_gid - Check if given GID is zero or not. |
|
* @gid: GID to check |
|
* Returns true if given GID is zero, returns false otherwise. |
|
*/ |
|
bool rdma_is_zero_gid(const union ib_gid *gid) |
|
{ |
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return !memcmp(gid, &zgid, sizeof(*gid)); |
|
} |
|
EXPORT_SYMBOL(rdma_is_zero_gid); |
|
|
|
/** is_gid_index_default - Check if a given index belongs to |
|
* reserved default GIDs or not. |
|
* @table: GID table pointer |
|
* @index: Index to check in GID table |
|
* Returns true if index is one of the reserved default GID index otherwise |
|
* returns false. |
|
*/ |
|
static bool is_gid_index_default(const struct ib_gid_table *table, |
|
unsigned int index) |
|
{ |
|
return index < 32 && (BIT(index) & table->default_gid_indices); |
|
} |
|
|
|
int ib_cache_gid_parse_type_str(const char *buf) |
|
{ |
|
unsigned int i; |
|
size_t len; |
|
int err = -EINVAL; |
|
|
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len = strlen(buf); |
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if (len == 0) |
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return -EINVAL; |
|
|
|
if (buf[len - 1] == '\n') |
|
len--; |
|
|
|
for (i = 0; i < ARRAY_SIZE(gid_type_str); ++i) |
|
if (gid_type_str[i] && !strncmp(buf, gid_type_str[i], len) && |
|
len == strlen(gid_type_str[i])) { |
|
err = i; |
|
break; |
|
} |
|
|
|
return err; |
|
} |
|
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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return device->port_data[port].cache.gid; |
|
} |
|
|
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static bool is_gid_entry_free(const struct ib_gid_table_entry *entry) |
|
{ |
|
return !entry; |
|
} |
|
|
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static bool is_gid_entry_valid(const struct ib_gid_table_entry *entry) |
|
{ |
|
return entry && entry->state == GID_TABLE_ENTRY_VALID; |
|
} |
|
|
|
static void schedule_free_gid(struct kref *kref) |
|
{ |
|
struct ib_gid_table_entry *entry = |
|
container_of(kref, struct ib_gid_table_entry, kref); |
|
|
|
queue_work(ib_wq, &entry->del_work); |
|
} |
|
|
|
static void put_gid_ndev(struct rcu_head *head) |
|
{ |
|
struct roce_gid_ndev_storage *storage = |
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container_of(head, struct roce_gid_ndev_storage, rcu_head); |
|
|
|
WARN_ON(!storage->ndev); |
|
/* At this point its safe to release netdev reference, |
|
* as all callers working on gid_attr->ndev are done |
|
* using this netdev. |
|
*/ |
|
dev_put(storage->ndev); |
|
kfree(storage); |
|
} |
|
|
|
static void free_gid_entry_locked(struct ib_gid_table_entry *entry) |
|
{ |
|
struct ib_device *device = entry->attr.device; |
|
u32 port_num = entry->attr.port_num; |
|
struct ib_gid_table *table = rdma_gid_table(device, port_num); |
|
|
|
dev_dbg(&device->dev, "%s port=%u index=%u gid %pI6\n", __func__, |
|
port_num, entry->attr.index, entry->attr.gid.raw); |
|
|
|
write_lock_irq(&table->rwlock); |
|
|
|
/* |
|
* The only way to avoid overwriting NULL in table is |
|
* by comparing if it is same entry in table or not! |
|
* If new entry in table is added by the time we free here, |
|
* don't overwrite the table entry. |
|
*/ |
|
if (entry == table->data_vec[entry->attr.index]) |
|
table->data_vec[entry->attr.index] = NULL; |
|
/* Now this index is ready to be allocated */ |
|
write_unlock_irq(&table->rwlock); |
|
|
|
if (entry->ndev_storage) |
|
call_rcu(&entry->ndev_storage->rcu_head, put_gid_ndev); |
|
kfree(entry); |
|
} |
|
|
|
static void free_gid_entry(struct kref *kref) |
|
{ |
|
struct ib_gid_table_entry *entry = |
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container_of(kref, struct ib_gid_table_entry, kref); |
|
|
|
free_gid_entry_locked(entry); |
|
} |
|
|
|
/** |
|
* free_gid_work - Release reference to the GID entry |
|
* @work: Work structure to refer to GID entry which needs to be |
|
* deleted. |
|
* |
|
* free_gid_work() frees the entry from the HCA's hardware table |
|
* if provider supports it. It releases reference to netdevice. |
|
*/ |
|
static void free_gid_work(struct work_struct *work) |
|
{ |
|
struct ib_gid_table_entry *entry = |
|
container_of(work, struct ib_gid_table_entry, del_work); |
|
struct ib_device *device = entry->attr.device; |
|
u32 port_num = entry->attr.port_num; |
|
struct ib_gid_table *table = rdma_gid_table(device, port_num); |
|
|
|
mutex_lock(&table->lock); |
|
free_gid_entry_locked(entry); |
|
mutex_unlock(&table->lock); |
|
} |
|
|
|
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; |
|
struct net_device *ndev; |
|
|
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entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
|
if (!entry) |
|
return NULL; |
|
|
|
ndev = rcu_dereference_protected(attr->ndev, 1); |
|
if (ndev) { |
|
entry->ndev_storage = kzalloc(sizeof(*entry->ndev_storage), |
|
GFP_KERNEL); |
|
if (!entry->ndev_storage) { |
|
kfree(entry); |
|
return NULL; |
|
} |
|
dev_hold(ndev); |
|
entry->ndev_storage->ndev = ndev; |
|
} |
|
kref_init(&entry->kref); |
|
memcpy(&entry->attr, attr, sizeof(*attr)); |
|
INIT_WORK(&entry->del_work, free_gid_work); |
|
entry->state = GID_TABLE_ENTRY_INVALID; |
|
return entry; |
|
} |
|
|
|
static void store_gid_entry(struct ib_gid_table *table, |
|
struct ib_gid_table_entry *entry) |
|
{ |
|
entry->state = GID_TABLE_ENTRY_VALID; |
|
|
|
dev_dbg(&entry->attr.device->dev, "%s port=%u index=%u gid %pI6\n", |
|
__func__, entry->attr.port_num, entry->attr.index, |
|
entry->attr.gid.raw); |
|
|
|
lockdep_assert_held(&table->lock); |
|
write_lock_irq(&table->rwlock); |
|
table->data_vec[entry->attr.index] = entry; |
|
write_unlock_irq(&table->rwlock); |
|
} |
|
|
|
static void get_gid_entry(struct ib_gid_table_entry *entry) |
|
{ |
|
kref_get(&entry->kref); |
|
} |
|
|
|
static void put_gid_entry(struct ib_gid_table_entry *entry) |
|
{ |
|
kref_put(&entry->kref, schedule_free_gid); |
|
} |
|
|
|
static void put_gid_entry_locked(struct ib_gid_table_entry *entry) |
|
{ |
|
kref_put(&entry->kref, free_gid_entry); |
|
} |
|
|
|
static int add_roce_gid(struct ib_gid_table_entry *entry) |
|
{ |
|
const struct ib_gid_attr *attr = &entry->attr; |
|
int ret; |
|
|
|
if (!attr->ndev) { |
|
dev_err(&attr->device->dev, "%s NULL netdev port=%u index=%u\n", |
|
__func__, attr->port_num, attr->index); |
|
return -EINVAL; |
|
} |
|
if (rdma_cap_roce_gid_table(attr->device, attr->port_num)) { |
|
ret = attr->device->ops.add_gid(attr, &entry->context); |
|
if (ret) { |
|
dev_err(&attr->device->dev, |
|
"%s GID add failed port=%u index=%u\n", |
|
__func__, attr->port_num, attr->index); |
|
return ret; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
/** |
|
* del_gid - Delete GID table entry |
|
* |
|
* @ib_dev: IB device whose GID entry to be deleted |
|
* @port: Port number of the IB device |
|
* @table: GID table of the IB device for a port |
|
* @ix: GID entry index to delete |
|
* |
|
*/ |
|
static void del_gid(struct ib_device *ib_dev, u32 port, |
|
struct ib_gid_table *table, int ix) |
|
{ |
|
struct roce_gid_ndev_storage *ndev_storage; |
|
struct ib_gid_table_entry *entry; |
|
|
|
lockdep_assert_held(&table->lock); |
|
|
|
dev_dbg(&ib_dev->dev, "%s port=%u index=%d gid %pI6\n", __func__, port, |
|
ix, table->data_vec[ix]->attr.gid.raw); |
|
|
|
write_lock_irq(&table->rwlock); |
|
entry = table->data_vec[ix]; |
|
entry->state = GID_TABLE_ENTRY_PENDING_DEL; |
|
/* |
|
* For non RoCE protocol, GID entry slot is ready to use. |
|
*/ |
|
if (!rdma_protocol_roce(ib_dev, port)) |
|
table->data_vec[ix] = NULL; |
|
write_unlock_irq(&table->rwlock); |
|
|
|
ndev_storage = entry->ndev_storage; |
|
if (ndev_storage) { |
|
entry->ndev_storage = NULL; |
|
rcu_assign_pointer(entry->attr.ndev, NULL); |
|
call_rcu(&ndev_storage->rcu_head, put_gid_ndev); |
|
} |
|
|
|
if (rdma_cap_roce_gid_table(ib_dev, port)) |
|
ib_dev->ops.del_gid(&entry->attr, &entry->context); |
|
|
|
put_gid_entry_locked(entry); |
|
} |
|
|
|
/** |
|
* add_modify_gid - Add or modify GID table entry |
|
* |
|
* @table: GID table in which GID to be added or modified |
|
* @attr: Attributes of the GID |
|
* |
|
* Returns 0 on success or appropriate error code. It accepts zero |
|
* GID addition for non RoCE ports for HCA's who report them as valid |
|
* GID. However such zero GIDs are not added to the cache. |
|
*/ |
|
static int add_modify_gid(struct ib_gid_table *table, |
|
const struct ib_gid_attr *attr) |
|
{ |
|
struct ib_gid_table_entry *entry; |
|
int ret = 0; |
|
|
|
/* |
|
* Invalidate any old entry in the table to make it safe to write to |
|
* this index. |
|
*/ |
|
if (is_gid_entry_valid(table->data_vec[attr->index])) |
|
del_gid(attr->device, attr->port_num, table, attr->index); |
|
|
|
/* |
|
* Some HCA's report multiple GID entries with only one valid GID, and |
|
* leave other unused entries as the zero GID. Convert zero GIDs to |
|
* empty table entries instead of storing them. |
|
*/ |
|
if (rdma_is_zero_gid(&attr->gid)) |
|
return 0; |
|
|
|
entry = alloc_gid_entry(attr); |
|
if (!entry) |
|
return -ENOMEM; |
|
|
|
if (rdma_protocol_roce(attr->device, attr->port_num)) { |
|
ret = add_roce_gid(entry); |
|
if (ret) |
|
goto done; |
|
} |
|
|
|
store_gid_entry(table, entry); |
|
return 0; |
|
|
|
done: |
|
put_gid_entry(entry); |
|
return ret; |
|
} |
|
|
|
/* rwlock should be read locked, or lock should be held */ |
|
static int find_gid(struct ib_gid_table *table, const union ib_gid *gid, |
|
const struct ib_gid_attr *val, bool default_gid, |
|
unsigned long mask, int *pempty) |
|
{ |
|
int i = 0; |
|
int found = -1; |
|
int empty = pempty ? -1 : 0; |
|
|
|
while (i < table->sz && (found < 0 || empty < 0)) { |
|
struct ib_gid_table_entry *data = table->data_vec[i]; |
|
struct ib_gid_attr *attr; |
|
int curr_index = i; |
|
|
|
i++; |
|
|
|
/* find_gid() is used during GID addition where it is expected |
|
* to return a free entry slot which is not duplicate. |
|
* Free entry slot is requested and returned if pempty is set, |
|
* so lookup free slot only if requested. |
|
*/ |
|
if (pempty && empty < 0) { |
|
if (is_gid_entry_free(data) && |
|
default_gid == |
|
is_gid_index_default(table, curr_index)) { |
|
/* |
|
* Found an invalid (free) entry; allocate it. |
|
* If default GID is requested, then our |
|
* found slot must be one of the DEFAULT |
|
* reserved slots or we fail. |
|
* This ensures that only DEFAULT reserved |
|
* slots are used for default property GIDs. |
|
*/ |
|
empty = curr_index; |
|
} |
|
} |
|
|
|
/* |
|
* Additionally find_gid() is used to find valid entry during |
|
* lookup operation; so ignore the entries which are marked as |
|
* pending for removal and the entries which are marked as |
|
* invalid. |
|
*/ |
|
if (!is_gid_entry_valid(data)) |
|
continue; |
|
|
|
if (found >= 0) |
|
continue; |
|
|
|
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) |
|
{ |
|
bool leak = false; |
|
int i; |
|
|
|
if (!table) |
|
return; |
|
|
|
for (i = 0; i < table->sz; i++) { |
|
if (is_gid_entry_free(table->data_vec[i])) |
|
continue; |
|
if (kref_read(&table->data_vec[i]->kref) > 1) { |
|
dev_err(&device->dev, |
|
"GID entry ref leak for index %d ref=%u\n", i, |
|
kref_read(&table->data_vec[i]->kref)); |
|
leak = true; |
|
} |
|
} |
|
if (leak) |
|
return; |
|
|
|
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 = -EINVAL; |
|
|
|
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 || |
|
!is_gid_entry_valid(table->data_vec[index])) |
|
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 |
|
* 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, int gid_tbl_len) |
|
{ |
|
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 < 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; |
|
} |
|
gid_attr.index = i; |
|
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->gid_tbl_len); |
|
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; |
|
|
|
rwlock_init(&device->cache_lock); |
|
|
|
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) |
|
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); |
|
}
|
|
|