lpfc_mem.c revision c44ce1737438d20ac58e808897e3f8eb015c66d3 
1/*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for         *
3 * Fibre Channel Host Bus Adapters.                                *
4 * Copyright (C) 2004-2005 Emulex.  All rights reserved.           *
5 * EMULEX and SLI are trademarks of Emulex.                        *
6 * www.emulex.com                                                  *
7 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
8 *                                                                 *
9 * This program is free software; you can redistribute it and/or   *
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.                                     *
20 *******************************************************************/
21
22#include <linux/mempool.h>
23#include <linux/pci.h>
24#include <linux/interrupt.h>
25
26#include "lpfc_hw.h"
27#include "lpfc_sli.h"
28#include "lpfc_disc.h"
29#include "lpfc_scsi.h"
30#include "lpfc.h"
31#include "lpfc_crtn.h"
32
33#define LPFC_MBUF_POOL_SIZE     64      /* max elements in MBUF safety pool */
34#define LPFC_MEM_POOL_SIZE      64      /* max elem in non-DMA safety pool */
35
36static void *
37lpfc_pool_kmalloc(unsigned int gfp_flags, void *data)
38{
39	return kmalloc((unsigned long)data, gfp_flags);
40}
41
42static void
43lpfc_pool_kfree(void *obj, void *data)
44{
45	kfree(obj);
46}
47
48int
49lpfc_mem_alloc(struct lpfc_hba * phba)
50{
51	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
52	int i;
53
54	phba->lpfc_scsi_dma_buf_pool = pci_pool_create("lpfc_scsi_dma_buf_pool",
55				phba->pcidev, phba->cfg_sg_dma_buf_size, 8, 0);
56	if (!phba->lpfc_scsi_dma_buf_pool)
57		goto fail;
58
59	phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev,
60							LPFC_BPL_SIZE, 8,0);
61	if (!phba->lpfc_mbuf_pool)
62		goto fail_free_dma_buf_pool;
63
64	pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) *
65					 LPFC_MBUF_POOL_SIZE, GFP_KERNEL);
66	pool->max_count = 0;
67	pool->current_count = 0;
68	for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
69		pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool,
70				       GFP_KERNEL, &pool->elements[i].phys);
71		if (!pool->elements[i].virt)
72			goto fail_free_mbuf_pool;
73		pool->max_count++;
74		pool->current_count++;
75	}
76
77	phba->mbox_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
78				lpfc_pool_kmalloc, lpfc_pool_kfree,
79				(void *)(unsigned long)sizeof(LPFC_MBOXQ_t));
80	if (!phba->mbox_mem_pool)
81		goto fail_free_mbuf_pool;
82
83	phba->nlp_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
84			lpfc_pool_kmalloc, lpfc_pool_kfree,
85			(void *)(unsigned long)sizeof(struct lpfc_nodelist));
86	if (!phba->nlp_mem_pool)
87		goto fail_free_mbox_pool;
88
89	return 0;
90
91 fail_free_mbox_pool:
92	mempool_destroy(phba->mbox_mem_pool);
93 fail_free_mbuf_pool:
94	while (--i)
95		pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
96						 pool->elements[i].phys);
97	kfree(pool->elements);
98	pci_pool_destroy(phba->lpfc_mbuf_pool);
99 fail_free_dma_buf_pool:
100	pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
101 fail:
102	return -ENOMEM;
103}
104
105void
106lpfc_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
114	list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
115		mp = (struct lpfc_dmabuf *) (mbox->context1);
116		if (mp) {
117			lpfc_mbuf_free(phba, mp->virt, mp->phys);
118			kfree(mp);
119		}
120		list_del(&mbox->list);
121		mempool_free(mbox, phba->mbox_mem_pool);
122	}
123
124	psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
125	if (psli->mbox_active) {
126		mbox = psli->mbox_active;
127		mp = (struct lpfc_dmabuf *) (mbox->context1);
128		if (mp) {
129			lpfc_mbuf_free(phba, mp->virt, mp->phys);
130			kfree(mp);
131		}
132		mempool_free(mbox, phba->mbox_mem_pool);
133		psli->mbox_active = NULL;
134	}
135
136	for (i = 0; i < pool->current_count; i++)
137		pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
138						 pool->elements[i].phys);
139	kfree(pool->elements);
140	mempool_destroy(phba->nlp_mem_pool);
141	mempool_destroy(phba->mbox_mem_pool);
142
143	pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
144	pci_pool_destroy(phba->lpfc_mbuf_pool);
145}
146
147void *
148lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
149{
150	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
151	void *ret;
152
153	ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
154
155	if (!ret && ( mem_flags & MEM_PRI) && pool->current_count) {
156		pool->current_count--;
157		ret = pool->elements[pool->current_count].virt;
158		*handle = pool->elements[pool->current_count].phys;
159	}
160	return ret;
161}
162
163void
164lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
165{
166	struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
167
168	if (pool->current_count < pool->max_count) {
169		pool->elements[pool->current_count].virt = virt;
170		pool->elements[pool->current_count].phys = dma;
171		pool->current_count++;
172	} else {
173		pci_pool_free(phba->lpfc_mbuf_pool, virt, dma);
174	}
175	return;
176}
177