Merge master.kernel.org:/pub/scm/linux/kernel/git/dtor/input
[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 "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
36 static void *
37 lpfc_pool_kmalloc(unsigned int gfp_flags, void *data)
38 {
39         return kmalloc((unsigned long)data, gfp_flags);
40 }
41
42 static void
43 lpfc_pool_kfree(void *obj, void *data)
44 {
45         kfree(obj);
46 }
47
48 int
49 lpfc_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
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
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
147 void *
148 lpfc_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
163 void
164 lpfc_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 }