forked from Minki/linux
4e57b68178
I recently picked up my older work to remove unnecessary #includes of sched.h, starting from a patch by Dave Jones to not include sched.h from module.h. This reduces the number of indirect includes of sched.h by ~300. Another ~400 pointless direct includes can be removed after this disentangling (patch to follow later). However, quite a few indirect includes need to be fixed up for this. In order to feed the patches through -mm with as little disturbance as possible, I've split out the fixes I accumulated up to now (complete for i386 and x86_64, more archs to follow later) and post them before the real patch. This way this large part of the patch is kept simple with only adding #includes, and all hunks are independent of each other. So if any hunk rejects or gets in the way of other patches, just drop it. My scripts will pick it up again in the next round. Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
369 lines
9.3 KiB
C
369 lines
9.3 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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* $Id: cache.c 1349 2004-12-16 21:09:43Z roland $
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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/sched.h> /* INIT_WORK, schedule_work(), flush_scheduled_work() */
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#include <rdma/ib_cache.h>
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#include "core_priv.h"
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struct ib_pkey_cache {
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int table_len;
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u16 table[0];
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};
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struct ib_gid_cache {
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int table_len;
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union ib_gid table[0];
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};
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struct ib_update_work {
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struct work_struct work;
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struct ib_device *device;
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u8 port_num;
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};
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static inline int start_port(struct ib_device *device)
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{
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return device->node_type == IB_NODE_SWITCH ? 0 : 1;
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}
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static inline int end_port(struct ib_device *device)
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{
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return device->node_type == IB_NODE_SWITCH ? 0 : device->phys_port_cnt;
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}
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int ib_get_cached_gid(struct ib_device *device,
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u8 port_num,
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int index,
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union ib_gid *gid)
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{
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struct ib_gid_cache *cache;
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unsigned long flags;
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int ret = 0;
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if (port_num < start_port(device) || port_num > end_port(device))
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return -EINVAL;
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read_lock_irqsave(&device->cache.lock, flags);
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cache = device->cache.gid_cache[port_num - start_port(device)];
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if (index < 0 || index >= cache->table_len)
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ret = -EINVAL;
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else
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*gid = cache->table[index];
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read_unlock_irqrestore(&device->cache.lock, flags);
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return ret;
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}
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EXPORT_SYMBOL(ib_get_cached_gid);
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int ib_find_cached_gid(struct ib_device *device,
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union ib_gid *gid,
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u8 *port_num,
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u16 *index)
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{
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struct ib_gid_cache *cache;
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unsigned long flags;
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int p, i;
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int ret = -ENOENT;
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*port_num = -1;
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if (index)
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*index = -1;
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read_lock_irqsave(&device->cache.lock, flags);
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for (p = 0; p <= end_port(device) - start_port(device); ++p) {
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cache = device->cache.gid_cache[p];
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for (i = 0; i < cache->table_len; ++i) {
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if (!memcmp(gid, &cache->table[i], sizeof *gid)) {
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*port_num = p + start_port(device);
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if (index)
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*index = i;
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ret = 0;
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goto found;
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}
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}
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}
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found:
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read_unlock_irqrestore(&device->cache.lock, flags);
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return ret;
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}
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EXPORT_SYMBOL(ib_find_cached_gid);
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int ib_get_cached_pkey(struct ib_device *device,
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u8 port_num,
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int index,
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u16 *pkey)
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{
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struct ib_pkey_cache *cache;
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unsigned long flags;
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int ret = 0;
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if (port_num < start_port(device) || port_num > end_port(device))
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return -EINVAL;
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read_lock_irqsave(&device->cache.lock, flags);
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cache = device->cache.pkey_cache[port_num - start_port(device)];
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if (index < 0 || index >= cache->table_len)
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ret = -EINVAL;
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else
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*pkey = cache->table[index];
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read_unlock_irqrestore(&device->cache.lock, flags);
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return ret;
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}
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EXPORT_SYMBOL(ib_get_cached_pkey);
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int ib_find_cached_pkey(struct ib_device *device,
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u8 port_num,
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u16 pkey,
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u16 *index)
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{
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struct ib_pkey_cache *cache;
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unsigned long flags;
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int i;
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int ret = -ENOENT;
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if (port_num < start_port(device) || port_num > end_port(device))
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return -EINVAL;
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read_lock_irqsave(&device->cache.lock, flags);
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cache = device->cache.pkey_cache[port_num - start_port(device)];
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*index = -1;
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for (i = 0; i < cache->table_len; ++i)
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if ((cache->table[i] & 0x7fff) == (pkey & 0x7fff)) {
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*index = i;
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ret = 0;
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break;
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}
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read_unlock_irqrestore(&device->cache.lock, flags);
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return ret;
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}
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EXPORT_SYMBOL(ib_find_cached_pkey);
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static void ib_cache_update(struct ib_device *device,
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u8 port)
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{
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struct ib_port_attr *tprops = NULL;
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struct ib_pkey_cache *pkey_cache = NULL, *old_pkey_cache;
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struct ib_gid_cache *gid_cache = NULL, *old_gid_cache;
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int i;
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int ret;
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tprops = kmalloc(sizeof *tprops, GFP_KERNEL);
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if (!tprops)
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return;
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ret = ib_query_port(device, port, tprops);
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if (ret) {
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printk(KERN_WARNING "ib_query_port failed (%d) for %s\n",
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ret, device->name);
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goto err;
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}
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pkey_cache = kmalloc(sizeof *pkey_cache + tprops->pkey_tbl_len *
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sizeof *pkey_cache->table, GFP_KERNEL);
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if (!pkey_cache)
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goto err;
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pkey_cache->table_len = tprops->pkey_tbl_len;
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gid_cache = kmalloc(sizeof *gid_cache + tprops->gid_tbl_len *
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sizeof *gid_cache->table, GFP_KERNEL);
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if (!gid_cache)
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goto err;
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gid_cache->table_len = tprops->gid_tbl_len;
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for (i = 0; i < pkey_cache->table_len; ++i) {
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ret = ib_query_pkey(device, port, i, pkey_cache->table + i);
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if (ret) {
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printk(KERN_WARNING "ib_query_pkey failed (%d) for %s (index %d)\n",
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ret, device->name, i);
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goto err;
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}
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}
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for (i = 0; i < gid_cache->table_len; ++i) {
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ret = ib_query_gid(device, port, i, gid_cache->table + i);
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if (ret) {
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printk(KERN_WARNING "ib_query_gid failed (%d) for %s (index %d)\n",
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ret, device->name, i);
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goto err;
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}
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}
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write_lock_irq(&device->cache.lock);
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old_pkey_cache = device->cache.pkey_cache[port - start_port(device)];
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old_gid_cache = device->cache.gid_cache [port - start_port(device)];
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device->cache.pkey_cache[port - start_port(device)] = pkey_cache;
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device->cache.gid_cache [port - start_port(device)] = gid_cache;
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write_unlock_irq(&device->cache.lock);
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kfree(old_pkey_cache);
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kfree(old_gid_cache);
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kfree(tprops);
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return;
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err:
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kfree(pkey_cache);
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kfree(gid_cache);
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kfree(tprops);
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}
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static void ib_cache_task(void *work_ptr)
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{
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struct ib_update_work *work = work_ptr;
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ib_cache_update(work->device, work->port_num);
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kfree(work);
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}
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static void ib_cache_event(struct ib_event_handler *handler,
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struct ib_event *event)
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{
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struct ib_update_work *work;
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if (event->event == IB_EVENT_PORT_ERR ||
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event->event == IB_EVENT_PORT_ACTIVE ||
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event->event == IB_EVENT_LID_CHANGE ||
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event->event == IB_EVENT_PKEY_CHANGE ||
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event->event == IB_EVENT_SM_CHANGE) {
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work = kmalloc(sizeof *work, GFP_ATOMIC);
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if (work) {
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INIT_WORK(&work->work, ib_cache_task, work);
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work->device = event->device;
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work->port_num = event->element.port_num;
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schedule_work(&work->work);
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}
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}
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}
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static void ib_cache_setup_one(struct ib_device *device)
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{
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int p;
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rwlock_init(&device->cache.lock);
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device->cache.pkey_cache =
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kmalloc(sizeof *device->cache.pkey_cache *
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(end_port(device) - start_port(device) + 1), GFP_KERNEL);
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device->cache.gid_cache =
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kmalloc(sizeof *device->cache.pkey_cache *
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(end_port(device) - start_port(device) + 1), GFP_KERNEL);
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if (!device->cache.pkey_cache || !device->cache.gid_cache) {
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printk(KERN_WARNING "Couldn't allocate cache "
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"for %s\n", device->name);
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goto err;
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}
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for (p = 0; p <= end_port(device) - start_port(device); ++p) {
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device->cache.pkey_cache[p] = NULL;
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device->cache.gid_cache [p] = NULL;
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ib_cache_update(device, p + start_port(device));
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}
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INIT_IB_EVENT_HANDLER(&device->cache.event_handler,
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device, ib_cache_event);
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if (ib_register_event_handler(&device->cache.event_handler))
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goto err_cache;
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return;
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err_cache:
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for (p = 0; p <= end_port(device) - start_port(device); ++p) {
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kfree(device->cache.pkey_cache[p]);
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kfree(device->cache.gid_cache[p]);
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}
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err:
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kfree(device->cache.pkey_cache);
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kfree(device->cache.gid_cache);
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}
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static void ib_cache_cleanup_one(struct ib_device *device)
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{
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int p;
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ib_unregister_event_handler(&device->cache.event_handler);
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flush_scheduled_work();
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for (p = 0; p <= end_port(device) - start_port(device); ++p) {
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kfree(device->cache.pkey_cache[p]);
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kfree(device->cache.gid_cache[p]);
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}
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kfree(device->cache.pkey_cache);
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kfree(device->cache.gid_cache);
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}
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static struct ib_client cache_client = {
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.name = "cache",
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.add = ib_cache_setup_one,
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.remove = ib_cache_cleanup_one
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};
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int __init ib_cache_setup(void)
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{
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return ib_register_client(&cache_client);
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}
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void __exit ib_cache_cleanup(void)
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{
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ib_unregister_client(&cache_client);
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}
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