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/*
* 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.
*
* $Id: cache.c 1349 2004-12-16 21:09:43Z roland $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/contrib/rdma/rdma_cache.c 178784 2008-05-05 18:35:55Z kmacy $");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/taskqueue.h>
#include <sys/lock.h>
#include <sys/rwlock.h>
#include <sys/mutex.h>
#include <sys/module.h>
#include <sys/syslog.h>
#ifdef needed
#include <sys/condvar.h>
#include <sys/socket.h>
#include <sys/condvar.h>
#endif
#include <contrib/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 task task;
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;
int ret = 0;
if (port_num < start_port(device) || port_num > end_port(device))
return -EINVAL;
mtx_lock(&device->cache.lock);
cache = device->cache.gid_cache[port_num - start_port(device)];
if (index < 0 || index >= cache->table_len)
ret = -EINVAL;
else
*gid = cache->table[index];
mtx_unlock(&device->cache.lock);
return ret;
}
int ib_find_cached_gid(struct ib_device *device,
union ib_gid *gid,
u8 *port_num,
u16 *index)
{
struct ib_gid_cache *cache;
int p, i;
int ret = -ENOENT;
*port_num = -1;
if (index)
*index = -1;
mtx_lock(&device->cache.lock);
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], 6)) { /* XXX */
*port_num = p + start_port(device);
if (index)
*index = i;
ret = 0;
goto found;
}
}
}
found:
mtx_unlock(&device->cache.lock);
return ret;
}
int ib_get_cached_pkey(struct ib_device *device,
u8 port_num,
int index,
u16 *pkey)
{
struct ib_pkey_cache *cache;
int ret = 0;
if (port_num < start_port(device) || port_num > end_port(device))
return -EINVAL;
mtx_lock(&device->cache.lock);
cache = device->cache.pkey_cache[port_num - start_port(device)];
if (index < 0 || index >= cache->table_len)
ret = -EINVAL;
else
*pkey = cache->table[index];
mtx_unlock(&device->cache.lock);
return ret;
}
int ib_find_cached_pkey(struct ib_device *device,
u8 port_num,
u16 pkey,
u16 *index)
{
struct ib_pkey_cache *cache;
int i;
int ret = -ENOENT;
if (port_num < start_port(device) || port_num > end_port(device))
return -EINVAL;
mtx_lock(&device->cache.lock);
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;
}
mtx_unlock(&device->cache.lock);
return ret;
}
int ib_get_cached_lmc(struct ib_device *device,
u8 port_num,
u8 *lmc)
{
int ret = 0;
if (port_num < start_port(device) || port_num > end_port(device))
return -EINVAL;
mtx_lock(&device->cache.lock);
*lmc = device->cache.lmc_cache[port_num - start_port(device)];
mtx_unlock(&device->cache.lock);
return ret;
}
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 = malloc(sizeof *tprops, M_DEVBUF, M_NOWAIT);
if (!tprops)
return;
ret = ib_query_port(device, port, tprops);
if (ret) {
log(LOG_WARNING, "ib_query_port failed (%d) for %s\n",
ret, device->name);
goto err;
}
pkey_cache = malloc(sizeof *pkey_cache + tprops->pkey_tbl_len *
sizeof *pkey_cache->table, M_DEVBUF, M_NOWAIT);
if (!pkey_cache)
goto err;
pkey_cache->table_len = tprops->pkey_tbl_len;
gid_cache = malloc(sizeof *gid_cache + tprops->gid_tbl_len *
sizeof *gid_cache->table, M_DEVBUF, M_NOWAIT);
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) {
log(LOG_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) {
log(LOG_WARNING, "ib_query_gid failed (%d) for %s (index %d)\n",
ret, device->name, i);
goto err;
}
}
mtx_lock(&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;
mtx_unlock(&device->cache.lock);
free(old_pkey_cache, M_DEVBUF);
free(old_gid_cache, M_DEVBUF);
free(tprops, M_DEVBUF);
return;
err:
free(pkey_cache, M_DEVBUF);
free(gid_cache, M_DEVBUF);
free(tprops, M_DEVBUF);
}
static void ib_cache_task(void *context, int pending)
{
struct ib_update_work *work = context;
ib_cache_update(work->device, work->port_num);
free(work, M_DEVBUF);
}
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 = malloc(sizeof *work, M_DEVBUF, M_NOWAIT);
if (work) {
TASK_INIT(&work->task, 0, ib_cache_task, work);
work->device = event->device;
work->port_num = event->element.port_num;
taskqueue_enqueue(taskqueue_thread, &work->task);
}
}
}
static void ib_cache_setup_one(struct ib_device *device)
{
int p;
mtx_init(&device->cache.lock, "ib device cache", NULL,
MTX_DUPOK|MTX_DEF);
device->cache.pkey_cache =
malloc(sizeof *device->cache.pkey_cache *
(end_port(device) - start_port(device) + 1), M_DEVBUF,
M_NOWAIT);
device->cache.gid_cache =
malloc(sizeof *device->cache.gid_cache *
(end_port(device) - start_port(device) + 1), M_DEVBUF,
M_NOWAIT);
device->cache.lmc_cache = malloc(sizeof *device->cache.lmc_cache *
(end_port(device) -
start_port(device) + 1),
M_DEVBUF, M_NOWAIT);
if (!device->cache.pkey_cache || !device->cache.gid_cache ||
!device->cache.lmc_cache) {
log(LOG_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) {
free(device->cache.pkey_cache[p], M_DEVBUF);
free(device->cache.gid_cache[p], M_DEVBUF);
}
err:
free(device->cache.pkey_cache, M_DEVBUF);
free(device->cache.gid_cache, M_DEVBUF);
free(device->cache.lmc_cache, M_DEVBUF);
}
static void ib_cache_cleanup_one(struct ib_device *device)
{
int p;
ib_unregister_event_handler(&device->cache.event_handler);
#ifdef XXX
flush_scheduled_work();
#endif
for (p = 0; p <= end_port(device) - start_port(device); ++p) {
free(device->cache.pkey_cache[p], M_DEVBUF);
free(device->cache.gid_cache[p], M_DEVBUF);
}
free(device->cache.pkey_cache, M_DEVBUF);
free(device->cache.gid_cache, M_DEVBUF);
free(device->cache.lmc_cache, M_DEVBUF);
}
static struct ib_client cache_client = {
.name = "cache",
.add = ib_cache_setup_one,
.remove = ib_cache_cleanup_one
};
int ib_cache_setup(void)
{
return ib_register_client(&cache_client);
}
void ib_cache_cleanup(void)
{
ib_unregister_client(&cache_client);
}