398 lines
10 KiB
C
398 lines
10 KiB
C
/*
|
|
* Copyright (c) 2004 Topspin Communications. All rights reserved.
|
|
* Copyright (c) 2005 Intel Corporation. All rights reserved.
|
|
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
|
|
* Copyright (c) 2005 Voltaire, Inc. All rights reserved.
|
|
*
|
|
* This software is available to you under a choice of one of two
|
|
* licenses. You may choose to be licensed under the terms of the GNU
|
|
* General Public License (GPL) Version 2, available from the file
|
|
* COPYING in the main directory of this source tree, or the
|
|
* OpenIB.org BSD license below:
|
|
*
|
|
* Redistribution and use in source and binary forms, with or
|
|
* without modification, are permitted provided that the following
|
|
* conditions are met:
|
|
*
|
|
* - Redistributions of source code must retain the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer.
|
|
*
|
|
* - Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials
|
|
* provided with the distribution.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
#include <rdma/ib_cache.h>
|
|
|
|
#include "core_priv.h"
|
|
|
|
struct ib_pkey_cache {
|
|
int table_len;
|
|
u16 table[0];
|
|
};
|
|
|
|
struct ib_gid_cache {
|
|
int table_len;
|
|
union ib_gid table[0];
|
|
};
|
|
|
|
struct ib_update_work {
|
|
struct work_struct work;
|
|
struct ib_device *device;
|
|
u8 port_num;
|
|
};
|
|
|
|
static inline int start_port(struct ib_device *device)
|
|
{
|
|
return (device->node_type == RDMA_NODE_IB_SWITCH) ? 0 : 1;
|
|
}
|
|
|
|
static inline int end_port(struct ib_device *device)
|
|
{
|
|
return (device->node_type == RDMA_NODE_IB_SWITCH) ?
|
|
0 : device->phys_port_cnt;
|
|
}
|
|
|
|
int ib_get_cached_gid(struct ib_device *device,
|
|
u8 port_num,
|
|
int index,
|
|
union ib_gid *gid)
|
|
{
|
|
struct ib_gid_cache *cache;
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
if (port_num < start_port(device) || port_num > end_port(device))
|
|
return -EINVAL;
|
|
|
|
read_lock_irqsave(&device->cache.lock, flags);
|
|
|
|
cache = device->cache.gid_cache[port_num - start_port(device)];
|
|
|
|
if (index < 0 || index >= cache->table_len)
|
|
ret = -EINVAL;
|
|
else
|
|
*gid = cache->table[index];
|
|
|
|
read_unlock_irqrestore(&device->cache.lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_get_cached_gid);
|
|
|
|
int ib_find_cached_gid(struct ib_device *device,
|
|
union ib_gid *gid,
|
|
u8 *port_num,
|
|
u16 *index)
|
|
{
|
|
struct ib_gid_cache *cache;
|
|
unsigned long flags;
|
|
int p, i;
|
|
int ret = -ENOENT;
|
|
|
|
*port_num = -1;
|
|
if (index)
|
|
*index = -1;
|
|
|
|
read_lock_irqsave(&device->cache.lock, flags);
|
|
|
|
for (p = 0; p <= end_port(device) - start_port(device); ++p) {
|
|
cache = device->cache.gid_cache[p];
|
|
for (i = 0; i < cache->table_len; ++i) {
|
|
if (!memcmp(gid, &cache->table[i], sizeof *gid)) {
|
|
*port_num = p + start_port(device);
|
|
if (index)
|
|
*index = i;
|
|
ret = 0;
|
|
goto found;
|
|
}
|
|
}
|
|
}
|
|
found:
|
|
read_unlock_irqrestore(&device->cache.lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_find_cached_gid);
|
|
|
|
int ib_get_cached_pkey(struct ib_device *device,
|
|
u8 port_num,
|
|
int index,
|
|
u16 *pkey)
|
|
{
|
|
struct ib_pkey_cache *cache;
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
if (port_num < start_port(device) || port_num > end_port(device))
|
|
return -EINVAL;
|
|
|
|
read_lock_irqsave(&device->cache.lock, flags);
|
|
|
|
cache = device->cache.pkey_cache[port_num - start_port(device)];
|
|
|
|
if (index < 0 || index >= cache->table_len)
|
|
ret = -EINVAL;
|
|
else
|
|
*pkey = cache->table[index];
|
|
|
|
read_unlock_irqrestore(&device->cache.lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_get_cached_pkey);
|
|
|
|
int ib_find_cached_pkey(struct ib_device *device,
|
|
u8 port_num,
|
|
u16 pkey,
|
|
u16 *index)
|
|
{
|
|
struct ib_pkey_cache *cache;
|
|
unsigned long flags;
|
|
int i;
|
|
int ret = -ENOENT;
|
|
|
|
if (port_num < start_port(device) || port_num > end_port(device))
|
|
return -EINVAL;
|
|
|
|
read_lock_irqsave(&device->cache.lock, flags);
|
|
|
|
cache = device->cache.pkey_cache[port_num - start_port(device)];
|
|
|
|
*index = -1;
|
|
|
|
for (i = 0; i < cache->table_len; ++i)
|
|
if ((cache->table[i] & 0x7fff) == (pkey & 0x7fff)) {
|
|
*index = i;
|
|
ret = 0;
|
|
break;
|
|
}
|
|
|
|
read_unlock_irqrestore(&device->cache.lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_find_cached_pkey);
|
|
|
|
int ib_get_cached_lmc(struct ib_device *device,
|
|
u8 port_num,
|
|
u8 *lmc)
|
|
{
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
if (port_num < start_port(device) || port_num > end_port(device))
|
|
return -EINVAL;
|
|
|
|
read_lock_irqsave(&device->cache.lock, flags);
|
|
*lmc = device->cache.lmc_cache[port_num - start_port(device)];
|
|
read_unlock_irqrestore(&device->cache.lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ib_get_cached_lmc);
|
|
|
|
static void ib_cache_update(struct ib_device *device,
|
|
u8 port)
|
|
{
|
|
struct ib_port_attr *tprops = NULL;
|
|
struct ib_pkey_cache *pkey_cache = NULL, *old_pkey_cache;
|
|
struct ib_gid_cache *gid_cache = NULL, *old_gid_cache;
|
|
int i;
|
|
int ret;
|
|
|
|
tprops = kmalloc(sizeof *tprops, GFP_KERNEL);
|
|
if (!tprops)
|
|
return;
|
|
|
|
ret = ib_query_port(device, port, tprops);
|
|
if (ret) {
|
|
printk(KERN_WARNING "ib_query_port failed (%d) for %s\n",
|
|
ret, device->name);
|
|
goto err;
|
|
}
|
|
|
|
pkey_cache = kmalloc(sizeof *pkey_cache + tprops->pkey_tbl_len *
|
|
sizeof *pkey_cache->table, GFP_KERNEL);
|
|
if (!pkey_cache)
|
|
goto err;
|
|
|
|
pkey_cache->table_len = tprops->pkey_tbl_len;
|
|
|
|
gid_cache = kmalloc(sizeof *gid_cache + tprops->gid_tbl_len *
|
|
sizeof *gid_cache->table, GFP_KERNEL);
|
|
if (!gid_cache)
|
|
goto err;
|
|
|
|
gid_cache->table_len = tprops->gid_tbl_len;
|
|
|
|
for (i = 0; i < pkey_cache->table_len; ++i) {
|
|
ret = ib_query_pkey(device, port, i, pkey_cache->table + i);
|
|
if (ret) {
|
|
printk(KERN_WARNING "ib_query_pkey failed (%d) for %s (index %d)\n",
|
|
ret, device->name, i);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < gid_cache->table_len; ++i) {
|
|
ret = ib_query_gid(device, port, i, gid_cache->table + i);
|
|
if (ret) {
|
|
printk(KERN_WARNING "ib_query_gid failed (%d) for %s (index %d)\n",
|
|
ret, device->name, i);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
write_lock_irq(&device->cache.lock);
|
|
|
|
old_pkey_cache = device->cache.pkey_cache[port - start_port(device)];
|
|
old_gid_cache = device->cache.gid_cache [port - start_port(device)];
|
|
|
|
device->cache.pkey_cache[port - start_port(device)] = pkey_cache;
|
|
device->cache.gid_cache [port - start_port(device)] = gid_cache;
|
|
|
|
device->cache.lmc_cache[port - start_port(device)] = tprops->lmc;
|
|
|
|
write_unlock_irq(&device->cache.lock);
|
|
|
|
kfree(old_pkey_cache);
|
|
kfree(old_gid_cache);
|
|
kfree(tprops);
|
|
return;
|
|
|
|
err:
|
|
kfree(pkey_cache);
|
|
kfree(gid_cache);
|
|
kfree(tprops);
|
|
}
|
|
|
|
static void ib_cache_task(struct work_struct *_work)
|
|
{
|
|
struct ib_update_work *work =
|
|
container_of(_work, struct ib_update_work, work);
|
|
|
|
ib_cache_update(work->device, work->port_num);
|
|
kfree(work);
|
|
}
|
|
|
|
static void ib_cache_event(struct ib_event_handler *handler,
|
|
struct ib_event *event)
|
|
{
|
|
struct ib_update_work *work;
|
|
|
|
if (event->event == IB_EVENT_PORT_ERR ||
|
|
event->event == IB_EVENT_PORT_ACTIVE ||
|
|
event->event == IB_EVENT_LID_CHANGE ||
|
|
event->event == IB_EVENT_PKEY_CHANGE ||
|
|
event->event == IB_EVENT_SM_CHANGE ||
|
|
event->event == IB_EVENT_CLIENT_REREGISTER) {
|
|
work = kmalloc(sizeof *work, GFP_ATOMIC);
|
|
if (work) {
|
|
INIT_WORK(&work->work, ib_cache_task);
|
|
work->device = event->device;
|
|
work->port_num = event->element.port_num;
|
|
schedule_work(&work->work);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void ib_cache_setup_one(struct ib_device *device)
|
|
{
|
|
int p;
|
|
|
|
rwlock_init(&device->cache.lock);
|
|
|
|
device->cache.pkey_cache =
|
|
kmalloc(sizeof *device->cache.pkey_cache *
|
|
(end_port(device) - start_port(device) + 1), GFP_KERNEL);
|
|
device->cache.gid_cache =
|
|
kmalloc(sizeof *device->cache.gid_cache *
|
|
(end_port(device) - start_port(device) + 1), GFP_KERNEL);
|
|
|
|
device->cache.lmc_cache = kmalloc(sizeof *device->cache.lmc_cache *
|
|
(end_port(device) -
|
|
start_port(device) + 1),
|
|
GFP_KERNEL);
|
|
|
|
if (!device->cache.pkey_cache || !device->cache.gid_cache ||
|
|
!device->cache.lmc_cache) {
|
|
printk(KERN_WARNING "Couldn't allocate cache "
|
|
"for %s\n", device->name);
|
|
goto err;
|
|
}
|
|
|
|
for (p = 0; p <= end_port(device) - start_port(device); ++p) {
|
|
device->cache.pkey_cache[p] = NULL;
|
|
device->cache.gid_cache [p] = NULL;
|
|
ib_cache_update(device, p + start_port(device));
|
|
}
|
|
|
|
INIT_IB_EVENT_HANDLER(&device->cache.event_handler,
|
|
device, ib_cache_event);
|
|
if (ib_register_event_handler(&device->cache.event_handler))
|
|
goto err_cache;
|
|
|
|
return;
|
|
|
|
err_cache:
|
|
for (p = 0; p <= end_port(device) - start_port(device); ++p) {
|
|
kfree(device->cache.pkey_cache[p]);
|
|
kfree(device->cache.gid_cache[p]);
|
|
}
|
|
|
|
err:
|
|
kfree(device->cache.pkey_cache);
|
|
kfree(device->cache.gid_cache);
|
|
kfree(device->cache.lmc_cache);
|
|
}
|
|
|
|
static void ib_cache_cleanup_one(struct ib_device *device)
|
|
{
|
|
int p;
|
|
|
|
ib_unregister_event_handler(&device->cache.event_handler);
|
|
flush_scheduled_work();
|
|
|
|
for (p = 0; p <= end_port(device) - start_port(device); ++p) {
|
|
kfree(device->cache.pkey_cache[p]);
|
|
kfree(device->cache.gid_cache[p]);
|
|
}
|
|
|
|
kfree(device->cache.pkey_cache);
|
|
kfree(device->cache.gid_cache);
|
|
kfree(device->cache.lmc_cache);
|
|
}
|
|
|
|
static struct ib_client cache_client = {
|
|
.name = "cache",
|
|
.add = ib_cache_setup_one,
|
|
.remove = ib_cache_cleanup_one
|
|
};
|
|
|
|
int __init ib_cache_setup(void)
|
|
{
|
|
return ib_register_client(&cache_client);
|
|
}
|
|
|
|
void __exit ib_cache_cleanup(void)
|
|
{
|
|
ib_unregister_client(&cache_client);
|
|
}
|