forked from Minki/linux
f4f82994d1
Pavel Emelyanov <xemul@openvz.org> mentioned in <http://lkml.org/lkml/2008/3/17/131> that the task_struct->tgid field is about to become deprecated, so the uses in the ehca driver need to be fixed up. However, all the uses in ehca are for some object ownership checking that is not really needed, and anyway is implementing a policy that should be in common code rather than a low-level driver. So just remove all the checks. Signed-off-by: Hoang-Nam Nguyen <hnguyen@de.ibm.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/*
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* IBM eServer eHCA Infiniband device driver for Linux on POWER
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*
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* PD functions
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*
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* Authors: Christoph Raisch <raisch@de.ibm.com>
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*
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* Copyright (c) 2005 IBM Corporation
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*
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* All rights reserved.
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*
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* This source code is distributed under a dual license of GPL v2.0 and OpenIB
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* BSD.
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*
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* OpenIB BSD License
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "ehca_tools.h"
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#include "ehca_iverbs.h"
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static struct kmem_cache *pd_cache;
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struct ib_pd *ehca_alloc_pd(struct ib_device *device,
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struct ib_ucontext *context, struct ib_udata *udata)
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{
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struct ehca_pd *pd;
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int i;
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pd = kmem_cache_zalloc(pd_cache, GFP_KERNEL);
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if (!pd) {
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ehca_err(device, "device=%p context=%p out of memory",
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device, context);
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return ERR_PTR(-ENOMEM);
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}
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for (i = 0; i < 2; i++) {
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INIT_LIST_HEAD(&pd->free[i]);
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INIT_LIST_HEAD(&pd->full[i]);
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}
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mutex_init(&pd->lock);
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/*
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* Kernel PD: when device = -1, 0
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* User PD: when context != -1
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*/
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if (!context) {
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/*
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* Kernel PDs after init reuses always
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* the one created in ehca_shca_reopen()
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*/
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struct ehca_shca *shca = container_of(device, struct ehca_shca,
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ib_device);
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pd->fw_pd.value = shca->pd->fw_pd.value;
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} else
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pd->fw_pd.value = (u64)pd;
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return &pd->ib_pd;
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}
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int ehca_dealloc_pd(struct ib_pd *pd)
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{
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struct ehca_pd *my_pd = container_of(pd, struct ehca_pd, ib_pd);
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int i, leftovers = 0;
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struct ipz_small_queue_page *page, *tmp;
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for (i = 0; i < 2; i++) {
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list_splice(&my_pd->full[i], &my_pd->free[i]);
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list_for_each_entry_safe(page, tmp, &my_pd->free[i], list) {
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leftovers = 1;
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free_page(page->page);
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kmem_cache_free(small_qp_cache, page);
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}
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}
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if (leftovers)
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ehca_warn(pd->device,
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"Some small queue pages were not freed");
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kmem_cache_free(pd_cache, my_pd);
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return 0;
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}
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int ehca_init_pd_cache(void)
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{
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pd_cache = kmem_cache_create("ehca_cache_pd",
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sizeof(struct ehca_pd), 0,
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SLAB_HWCACHE_ALIGN,
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NULL);
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if (!pd_cache)
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return -ENOMEM;
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return 0;
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}
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void ehca_cleanup_pd_cache(void)
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{
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if (pd_cache)
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kmem_cache_destroy(pd_cache);
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}
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