Merge with /pub/scm/linux/kernel/git/torvalds/linux-2.6.git
[linux-2.6] / drivers / scsi / lpfc / lpfc_mem.c
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 <scsi/scsi_device.h>
27 #include <scsi/scsi_transport_fc.h>
28
29 #include <scsi/scsi.h>
30
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
41 static void *
42 lpfc_pool_kmalloc(gfp_t gfp_flags, void *data)
43 {
44         return kmalloc((unsigned long)data, gfp_flags);
45 }
46
47 static void
48 lpfc_pool_kfree(void *obj, void *data)
49 {
50         kfree(obj);
51 }
52
53 int
54 lpfc_mem_alloc(struct lpfc_hba * phba)
55 {
56         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
57         int i;
58
59         phba->lpfc_scsi_dma_buf_pool = pci_pool_create("lpfc_scsi_dma_buf_pool",
60                                 phba->pcidev, phba->cfg_sg_dma_buf_size, 8, 0);
61         if (!phba->lpfc_scsi_dma_buf_pool)
62                 goto fail;
63
64         phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev,
65                                                         LPFC_BPL_SIZE, 8,0);
66         if (!phba->lpfc_mbuf_pool)
67                 goto fail_free_dma_buf_pool;
68
69         pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) *
70                                          LPFC_MBUF_POOL_SIZE, GFP_KERNEL);
71         pool->max_count = 0;
72         pool->current_count = 0;
73         for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
74                 pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool,
75                                        GFP_KERNEL, &pool->elements[i].phys);
76                 if (!pool->elements[i].virt)
77                         goto fail_free_mbuf_pool;
78                 pool->max_count++;
79                 pool->current_count++;
80         }
81
82         phba->mbox_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
83                                 lpfc_pool_kmalloc, lpfc_pool_kfree,
84                                 (void *)(unsigned long)sizeof(LPFC_MBOXQ_t));
85         if (!phba->mbox_mem_pool)
86                 goto fail_free_mbuf_pool;
87
88         phba->nlp_mem_pool = mempool_create(LPFC_MEM_POOL_SIZE,
89                         lpfc_pool_kmalloc, lpfc_pool_kfree,
90                         (void *)(unsigned long)sizeof(struct lpfc_nodelist));
91         if (!phba->nlp_mem_pool)
92                 goto fail_free_mbox_pool;
93
94         return 0;
95
96  fail_free_mbox_pool:
97         mempool_destroy(phba->mbox_mem_pool);
98  fail_free_mbuf_pool:
99         while (--i)
100                 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
101                                                  pool->elements[i].phys);
102         kfree(pool->elements);
103         pci_pool_destroy(phba->lpfc_mbuf_pool);
104  fail_free_dma_buf_pool:
105         pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
106  fail:
107         return -ENOMEM;
108 }
109
110 void
111 lpfc_mem_free(struct lpfc_hba * phba)
112 {
113         struct lpfc_sli *psli = &phba->sli;
114         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
115         LPFC_MBOXQ_t *mbox, *next_mbox;
116         struct lpfc_dmabuf   *mp;
117         int i;
118
119         list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
120                 mp = (struct lpfc_dmabuf *) (mbox->context1);
121                 if (mp) {
122                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
123                         kfree(mp);
124                 }
125                 list_del(&mbox->list);
126                 mempool_free(mbox, phba->mbox_mem_pool);
127         }
128
129         psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
130         if (psli->mbox_active) {
131                 mbox = psli->mbox_active;
132                 mp = (struct lpfc_dmabuf *) (mbox->context1);
133                 if (mp) {
134                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
135                         kfree(mp);
136                 }
137                 mempool_free(mbox, phba->mbox_mem_pool);
138                 psli->mbox_active = NULL;
139         }
140
141         for (i = 0; i < pool->current_count; i++)
142                 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
143                                                  pool->elements[i].phys);
144         kfree(pool->elements);
145         mempool_destroy(phba->nlp_mem_pool);
146         mempool_destroy(phba->mbox_mem_pool);
147
148         pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
149         pci_pool_destroy(phba->lpfc_mbuf_pool);
150 }
151
152 void *
153 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
154 {
155         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
156         void *ret;
157
158         ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
159
160         if (!ret && ( mem_flags & MEM_PRI) && pool->current_count) {
161                 pool->current_count--;
162                 ret = pool->elements[pool->current_count].virt;
163                 *handle = pool->elements[pool->current_count].phys;
164         }
165         return ret;
166 }
167
168 void
169 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
170 {
171         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
172
173         if (pool->current_count < pool->max_count) {
174                 pool->elements[pool->current_count].virt = virt;
175                 pool->elements[pool->current_count].phys = dma;
176                 pool->current_count++;
177         } else {
178                 pci_pool_free(phba->lpfc_mbuf_pool, virt, dma);
179         }
180         return;
181 }