125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
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/*
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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 <linux/slab.h>
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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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