[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / lpfc / lpfc_mem.c

/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channel Host Bus Adapters.                                *
 * Copyright (C) 2004-2006 Emulex.  All rights reserved.           *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.emulex.com                                                  *
 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
 * modify it under the terms of version 2 of the GNU General       *
 * Public License as published by the Free Software Foundation.    *
 * This program is distributed in the hope that it will be useful. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
 *******************************************************************/

#include <linux/mempool.h>
#include <linux/pci.h>
#include <linux/interrupt.h>

#include <scsi/scsi_device.h>
#include <scsi/scsi_transport_fc.h>

#include <scsi/scsi.h>

#include "lpfc_hw.h"
#include "lpfc_sli.h"
#include "lpfc_disc.h"
#include "lpfc_scsi.h"
#include "lpfc.h"
#include "lpfc_crtn.h"

#define LPFC_MBUF_POOL_SIZE     64      /* max elements in MBUF safety pool */
#define LPFC_MEM_POOL_SIZE      64      /* max elem in non-DMA safety pool */


int
lpfc_mem_alloc(struct lpfc_hba * phba)
{
	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
	int i;

	phba->lpfc_scsi_dma_buf_pool = pci_pool_create("lpfc_scsi_dma_buf_pool",
				phba->pcidev, phba->cfg_sg_dma_buf_size, 8, 0);
	if (!phba->lpfc_scsi_dma_buf_pool)
		goto fail;

	phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev,
							LPFC_BPL_SIZE, 8,0);
	if (!phba->lpfc_mbuf_pool)
		goto fail_free_dma_buf_pool;

	pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) *
					 LPFC_MBUF_POOL_SIZE, GFP_KERNEL);
	if (!pool->elements)
		goto fail_free_lpfc_mbuf_pool;

	pool->max_count = 0;
	pool->current_count = 0;
	for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
		pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool,
				       GFP_KERNEL, &pool->elements[i].phys);
		if (!pool->elements[i].virt)
			goto fail_free_mbuf_pool;
		pool->max_count++;
		pool->current_count++;
	}

	phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
							 sizeof(LPFC_MBOXQ_t));
	if (!phba->mbox_mem_pool)
		goto fail_free_mbuf_pool;

	phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
						sizeof(struct lpfc_nodelist));
	if (!phba->nlp_mem_pool)
		goto fail_free_mbox_pool;

	return 0;

 fail_free_mbox_pool:
	mempool_destroy(phba->mbox_mem_pool);
	phba->mbox_mem_pool = NULL;
 fail_free_mbuf_pool:
	while (i--)
		pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
						 pool->elements[i].phys);
	kfree(pool->elements);
 fail_free_lpfc_mbuf_pool:
	pci_pool_destroy(phba->lpfc_mbuf_pool);
	phba->lpfc_mbuf_pool = NULL;
 fail_free_dma_buf_pool:
	pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
	phba->lpfc_scsi_dma_buf_pool = NULL;
 fail:
	return -ENOMEM;
}

void
lpfc_mem_free(struct lpfc_hba * phba)
{
	struct lpfc_sli *psli = &phba->sli;
	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
	LPFC_MBOXQ_t *mbox, *next_mbox;
	struct lpfc_dmabuf   *mp;
	int i;

	spin_lock_irq(&phba->hbalock);
	list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
		mp = (struct lpfc_dmabuf *) (mbox->context1);
		if (mp) {
			lpfc_mbuf_free(phba, mp->virt, mp->phys);
			kfree(mp);
		}
		list_del(&mbox->list);
		mempool_free(mbox, phba->mbox_mem_pool);
	}

	psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
	spin_unlock_irq(&phba->hbalock);
	if (psli->mbox_active) {
		mbox = psli->mbox_active;
		mp = (struct lpfc_dmabuf *) (mbox->context1);
		if (mp) {
			lpfc_mbuf_free(phba, mp->virt, mp->phys);
			kfree(mp);
		}
		mempool_free(mbox, phba->mbox_mem_pool);
		psli->mbox_active = NULL;
	}

	for (i = 0; i < pool->current_count; i++)
		pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
						 pool->elements[i].phys);
	kfree(pool->elements);

	mempool_destroy(phba->nlp_mem_pool);
	mempool_destroy(phba->mbox_mem_pool);

	pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
	pci_pool_destroy(phba->lpfc_mbuf_pool);

	phba->nlp_mem_pool = NULL;
	phba->mbox_mem_pool = NULL;
	phba->lpfc_scsi_dma_buf_pool = NULL;
	phba->lpfc_mbuf_pool = NULL;

	/* Free the iocb lookup array */
	kfree(psli->iocbq_lookup);
	psli->iocbq_lookup = NULL;

}

void *
lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
{
	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
	unsigned long iflags;
	void *ret;

	ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);

	spin_lock_irqsave(&phba->hbalock, iflags);
	if (!ret && ( mem_flags & MEM_PRI) && pool->current_count) {
		pool->current_count--;
		ret = pool->elements[pool->current_count].virt;
		*handle = pool->elements[pool->current_count].phys;
	}
	spin_unlock_irqrestore(&phba->hbalock, iflags);
	return ret;
}

void
__lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
{
	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;

	if (pool->current_count < pool->max_count) {
		pool->elements[pool->current_count].virt = virt;
		pool->elements[pool->current_count].phys = dma;
		pool->current_count++;
	} else {
		pci_pool_free(phba->lpfc_mbuf_pool, virt, dma);
	}
	return;
}

void
lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
{
	unsigned long iflags;

	spin_lock_irqsave(&phba->hbalock, iflags);
	__lpfc_mbuf_free(phba, virt, dma);
	spin_unlock_irqrestore(&phba->hbalock, iflags);
	return;
}
Commit	Line	Data
dea3101e JB	1	/*******************************************************************
dea3101e JB	2	* This file is part of the Emulex Linux Device Driver for *
c44ce173	3	* Fibre Channel Host Bus Adapters. *
2e0fef85	4	* Copyright (C) 2004-2006 Emulex. All rights reserved. *
c44ce173	5	* EMULEX and SLI are trademarks of Emulex. *
dea3101e	6	* www.emulex.com *
c44ce173	7	* Portions Copyright (C) 2004-2005 Christoph Hellwig *
dea3101e JB	8	* *
dea3101e JB	9	* This program is free software; you can redistribute it and/or *
c44ce173 JSEC	10	* modify it under the terms of version 2 of the GNU General *
	11	* Public License as published by the Free Software Foundation. *
	12	* This program is distributed in the hope that it will be useful. *
	13	* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
	14	* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
	15	* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
	16	* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
	17	* TO BE LEGALLY INVALID. See the GNU General Public License for *
	18	* more details, a copy of which can be found in the file COPYING *
	19	* included with this package. *
dea3101e JB	20	*******************************************************************/
dea3101e JB	21
dea3101e JB	22	#include <linux/mempool.h>
	23	#include <linux/pci.h>
	24	#include <linux/interrupt.h>
	25
f888ba3c JSEC	26	#include <scsi/scsi_device.h>
	27	#include <scsi/scsi_transport_fc.h>
	28
91886523 JSEC	29	#include <scsi/scsi.h>
91886523 JSEC	30
dea3101e JB	31	#include "lpfc_hw.h"
	32	#include "lpfc_sli.h"
	33	#include "lpfc_disc.h"
	34	#include "lpfc_scsi.h"
	35	#include "lpfc.h"
	36	#include "lpfc_crtn.h"
	37
	38	#define LPFC_MBUF_POOL_SIZE 64 /* max elements in MBUF safety pool */
	39	#define LPFC_MEM_POOL_SIZE 64 /* max elem in non-DMA safety pool */
	40
2e0fef85 JS	41
2e0fef85 JS	42
dea3101e JB	43	int
	44	lpfc_mem_alloc(struct lpfc_hba * phba)
	45	{
	46	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
	47	int i;
	48
	49	phba->lpfc_scsi_dma_buf_pool = pci_pool_create("lpfc_scsi_dma_buf_pool",
	50	phba->pcidev, phba->cfg_sg_dma_buf_size, 8, 0);
	51	if (!phba->lpfc_scsi_dma_buf_pool)
	52	goto fail;
	53
	54	phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev,
	55	LPFC_BPL_SIZE, 8,0);
	56	if (!phba->lpfc_mbuf_pool)
	57	goto fail_free_dma_buf_pool;
	58
	59	pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) *
	60	LPFC_MBUF_POOL_SIZE, GFP_KERNEL);
a96e0c77 MK	61	if (!pool->elements)
	62	goto fail_free_lpfc_mbuf_pool;
	63
dea3101e JB	64	pool->max_count = 0;
	65	pool->current_count = 0;
	66	for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
	67	pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool,
	68	GFP_KERNEL, &pool->elements[i].phys);
	69	if (!pool->elements[i].virt)
	70	goto fail_free_mbuf_pool;
	71	pool->max_count++;
	72	pool->current_count++;
	73	}
	74
0eaae62a MD	75	phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
0eaae62a MD	76	sizeof(LPFC_MBOXQ_t));
dea3101e JB	77	if (!phba->mbox_mem_pool)
	78	goto fail_free_mbuf_pool;
	79
0eaae62a MD	80	phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
0eaae62a MD	81	sizeof(struct lpfc_nodelist));
dea3101e JB	82	if (!phba->nlp_mem_pool)
	83	goto fail_free_mbox_pool;
	84
	85	return 0;
	86
	87	fail_free_mbox_pool:
	88	mempool_destroy(phba->mbox_mem_pool);
2e0fef85	89	phba->mbox_mem_pool = NULL;
dea3101e	90	fail_free_mbuf_pool:
a96e0c77	91	while (i--)
dea3101e JB	92	pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
	93	pool->elements[i].phys);
	94	kfree(pool->elements);
a96e0c77	95	fail_free_lpfc_mbuf_pool:
dea3101e	96	pci_pool_destroy(phba->lpfc_mbuf_pool);
2e0fef85	97	phba->lpfc_mbuf_pool = NULL;
dea3101e JB	98	fail_free_dma_buf_pool:
dea3101e JB	99	pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
2e0fef85	100	phba->lpfc_scsi_dma_buf_pool = NULL;
dea3101e JB	101	fail:
	102	return -ENOMEM;
	103	}
	104
	105	void
	106	lpfc_mem_free(struct lpfc_hba * phba)
	107	{
	108	struct lpfc_sli *psli = &phba->sli;
	109	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
	110	LPFC_MBOXQ_t mbox, next_mbox;
	111	struct lpfc_dmabuf *mp;
	112	int i;
	113
2e0fef85	114	spin_lock_irq(&phba->hbalock);
dea3101e JB	115	list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
	116	mp = (struct lpfc_dmabuf *) (mbox->context1);
	117	if (mp) {
	118	lpfc_mbuf_free(phba, mp->virt, mp->phys);
	119	kfree(mp);
	120	}
	121	list_del(&mbox->list);
	122	mempool_free(mbox, phba->mbox_mem_pool);
	123	}
	124
	125	psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
2e0fef85	126	spin_unlock_irq(&phba->hbalock);
dea3101e JB	127	if (psli->mbox_active) {
	128	mbox = psli->mbox_active;
	129	mp = (struct lpfc_dmabuf *) (mbox->context1);
	130	if (mp) {
	131	lpfc_mbuf_free(phba, mp->virt, mp->phys);
	132	kfree(mp);
	133	}
	134	mempool_free(mbox, phba->mbox_mem_pool);
	135	psli->mbox_active = NULL;
	136	}
	137
	138	for (i = 0; i < pool->current_count; i++)
	139	pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
	140	pool->elements[i].phys);
	141	kfree(pool->elements);
2e0fef85	142
dea3101e JB	143	mempool_destroy(phba->nlp_mem_pool);
	144	mempool_destroy(phba->mbox_mem_pool);
	145
	146	pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
	147	pci_pool_destroy(phba->lpfc_mbuf_pool);
9f49d3b0	148
2e0fef85 JS	149	phba->nlp_mem_pool = NULL;
	150	phba->mbox_mem_pool = NULL;
	151	phba->lpfc_scsi_dma_buf_pool = NULL;
	152	phba->lpfc_mbuf_pool = NULL;
	153
9f49d3b0 JS	154	/* Free the iocb lookup array */
	155	kfree(psli->iocbq_lookup);
	156	psli->iocbq_lookup = NULL;
	157
dea3101e JB	158	}
	159
	160	void *
	161	lpfc_mbuf_alloc(struct lpfc_hba phba, int mem_flags, dma_addr_t handle)
	162	{
	163	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
2e0fef85	164	unsigned long iflags;
dea3101e JB	165	void *ret;
	166
	167	ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
	168
2e0fef85	169	spin_lock_irqsave(&phba->hbalock, iflags);
dea3101e JB	170	if (!ret && ( mem_flags & MEM_PRI) && pool->current_count) {
	171	pool->current_count--;
	172	ret = pool->elements[pool->current_count].virt;
	173	*handle = pool->elements[pool->current_count].phys;
	174	}
2e0fef85	175	spin_unlock_irqrestore(&phba->hbalock, iflags);
dea3101e JB	176	return ret;
	177	}
	178
	179	void
2e0fef85	180	__lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
dea3101e JB	181	{
	182	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
	183
	184	if (pool->current_count < pool->max_count) {
	185	pool->elements[pool->current_count].virt = virt;
	186	pool->elements[pool->current_count].phys = dma;
	187	pool->current_count++;
	188	} else {
	189	pci_pool_free(phba->lpfc_mbuf_pool, virt, dma);
	190	}
	191	return;
	192	}
2e0fef85 JS	193
	194	void
	195	lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
	196	{
	197	unsigned long iflags;
	198
	199	spin_lock_irqsave(&phba->hbalock, iflags);
	200	__lpfc_mbuf_free(phba, virt, dma);
	201	spin_unlock_irqrestore(&phba->hbalock, iflags);
	202	return;
	203	}