[net-next-2.6.git] / drivers / infiniband / hw / ehca / ehca_pd.c

/*
 *  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 <asm/current.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;

	pd = kmem_cache_alloc(pd_cache, GFP_KERNEL);
	if (!pd) {
		ehca_err(device, "device=%p context=%p out of memory",
			 device, context);
		return ERR_PTR(-ENOMEM);
	}

	memset(pd, 0, sizeof(struct ehca_pd));
	pd->ownpid = current->tgid;

	/*
	 * 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)
{
	u32 cur_pid = current->tgid;
	struct ehca_pd *my_pd = container_of(pd, struct ehca_pd, ib_pd);

	if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
	    my_pd->ownpid != cur_pid) {
		ehca_err(pd->device, "Invalid caller pid=%x ownpid=%x",
			 cur_pid, my_pd->ownpid);
		return -EINVAL;
	}

	kmem_cache_free(pd_cache,
			container_of(pd, struct ehca_pd, ib_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, NULL);
	if (!pd_cache)
		return -ENOMEM;
	return 0;
}

void ehca_cleanup_pd_cache(void)
{
	if (pd_cache)
		kmem_cache_destroy(pd_cache);
}
Commit	Line	Data
fab97220 HS	1	/*
	2	* IBM eServer eHCA Infiniband device driver for Linux on POWER
	3	*
	4	* PD functions
	5	*
	6	* Authors: Christoph Raisch <raisch@de.ibm.com>
	7	*
	8	* Copyright (c) 2005 IBM Corporation
	9	*
	10	* All rights reserved.
	11	*
	12	* This source code is distributed under a dual license of GPL v2.0 and OpenIB
	13	* BSD.
	14	*
	15	* OpenIB BSD License
	16	*
	17	* Redistribution and use in source and binary forms, with or without
	18	* modification, are permitted provided that the following conditions are met:
	19	*
	20	* Redistributions of source code must retain the above copyright notice, this
	21	* list of conditions and the following disclaimer.
	22	*
	23	* Redistributions in binary form must reproduce the above copyright notice,
	24	* this list of conditions and the following disclaimer in the documentation
	25	* and/or other materials
	26	* provided with the distribution.
	27	*
	28	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	29	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	30	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	31	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
	32	* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	33	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	34	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
	35	* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
	36	* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	37	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	38	* POSSIBILITY OF SUCH DAMAGE.
	39	*/
	40
	41	#include <asm/current.h>
	42
	43	#include "ehca_tools.h"
	44	#include "ehca_iverbs.h"
	45
	46	static struct kmem_cache *pd_cache;
	47
	48	struct ib_pd ehca_alloc_pd(struct ib_device device,
	49	struct ib_ucontext context, struct ib_udata udata)
	50	{
	51	struct ehca_pd *pd;
	52
e94b1766	53	pd = kmem_cache_alloc(pd_cache, GFP_KERNEL);
fab97220 HS	54	if (!pd) {
	55	ehca_err(device, "device=%p context=%p out of memory",
	56	device, context);
	57	return ERR_PTR(-ENOMEM);
	58	}
	59
	60	memset(pd, 0, sizeof(struct ehca_pd));
	61	pd->ownpid = current->tgid;
	62
	63	/*
	64	* Kernel PD: when device = -1, 0
	65	* User PD: when context != -1
	66	*/
	67	if (!context) {
	68	/*
	69	* Kernel PDs after init reuses always
	70	* the one created in ehca_shca_reopen()
	71	*/
	72	struct ehca_shca *shca = container_of(device, struct ehca_shca,
	73	ib_device);
	74	pd->fw_pd.value = shca->pd->fw_pd.value;
	75	} else
	76	pd->fw_pd.value = (u64)pd;
	77
	78	return &pd->ib_pd;
	79	}
	80
	81	int ehca_dealloc_pd(struct ib_pd *pd)
	82	{
	83	u32 cur_pid = current->tgid;
	84	struct ehca_pd *my_pd = container_of(pd, struct ehca_pd, ib_pd);
	85
	86	if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
	87	my_pd->ownpid != cur_pid) {
	88	ehca_err(pd->device, "Invalid caller pid=%x ownpid=%x",
	89	cur_pid, my_pd->ownpid);
	90	return -EINVAL;
	91	}
	92
	93	kmem_cache_free(pd_cache,
	94	container_of(pd, struct ehca_pd, ib_pd));
	95
	96	return 0;
	97	}
	98
	99	int ehca_init_pd_cache(void)
	100	{
	101	pd_cache = kmem_cache_create("ehca_cache_pd",
	102	sizeof(struct ehca_pd), 0,
	103	SLAB_HWCACHE_ALIGN,
	104	NULL, NULL);
	105	if (!pd_cache)
	106	return -ENOMEM;
	107	return 0;
	108	}
	109
	110	void ehca_cleanup_pd_cache(void)
	111	{
	112	if (pd_cache)
	113	kmem_cache_destroy(pd_cache);
	114	}