You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
124 lines
3.3 KiB
124 lines
3.3 KiB
/*
|
|
* IBM eServer eHCA Infiniband device driver for Linux on POWER
|
|
*
|
|
* PD functions
|
|
*
|
|
* Authors: Christoph Raisch <raisch@de.ibm.com>
|
|
*
|
|
* Copyright (c) 2005 IBM Corporation
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* This source code is distributed under a dual license of GPL v2.0 and OpenIB
|
|
* BSD.
|
|
*
|
|
* OpenIB BSD License
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
|
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
|
|
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <linux/slab.h>
|
|
|
|
#include "ehca_tools.h"
|
|
#include "ehca_iverbs.h"
|
|
|
|
static struct kmem_cache *pd_cache;
|
|
|
|
struct ib_pd *ehca_alloc_pd(struct ib_device *device,
|
|
struct ib_ucontext *context, struct ib_udata *udata)
|
|
{
|
|
struct ehca_pd *pd;
|
|
int i;
|
|
|
|
pd = kmem_cache_zalloc(pd_cache, GFP_KERNEL);
|
|
if (!pd) {
|
|
ehca_err(device, "device=%p context=%p out of memory",
|
|
device, context);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
INIT_LIST_HEAD(&pd->free[i]);
|
|
INIT_LIST_HEAD(&pd->full[i]);
|
|
}
|
|
mutex_init(&pd->lock);
|
|
|
|
/*
|
|
* Kernel PD: when device = -1, 0
|
|
* User PD: when context != -1
|
|
*/
|
|
if (!context) {
|
|
/*
|
|
* Kernel PDs after init reuses always
|
|
* the one created in ehca_shca_reopen()
|
|
*/
|
|
struct ehca_shca *shca = container_of(device, struct ehca_shca,
|
|
ib_device);
|
|
pd->fw_pd.value = shca->pd->fw_pd.value;
|
|
} else
|
|
pd->fw_pd.value = (u64)pd;
|
|
|
|
return &pd->ib_pd;
|
|
}
|
|
|
|
int ehca_dealloc_pd(struct ib_pd *pd)
|
|
{
|
|
struct ehca_pd *my_pd = container_of(pd, struct ehca_pd, ib_pd);
|
|
int i, leftovers = 0;
|
|
struct ipz_small_queue_page *page, *tmp;
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
list_splice(&my_pd->full[i], &my_pd->free[i]);
|
|
list_for_each_entry_safe(page, tmp, &my_pd->free[i], list) {
|
|
leftovers = 1;
|
|
free_page(page->page);
|
|
kmem_cache_free(small_qp_cache, page);
|
|
}
|
|
}
|
|
|
|
if (leftovers)
|
|
ehca_warn(pd->device,
|
|
"Some small queue pages were not freed");
|
|
|
|
kmem_cache_free(pd_cache, my_pd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ehca_init_pd_cache(void)
|
|
{
|
|
pd_cache = kmem_cache_create("ehca_cache_pd",
|
|
sizeof(struct ehca_pd), 0,
|
|
SLAB_HWCACHE_ALIGN,
|
|
NULL);
|
|
if (!pd_cache)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
void ehca_cleanup_pd_cache(void)
|
|
{
|
|
if (pd_cache)
|
|
kmem_cache_destroy(pd_cache);
|
|
}
|
|
|