1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2008 Emulex. All rights reserved. *
5 * EMULEX and SLI are trademarks of Emulex. *
7 * Portions Copyright (C) 2004-2005 Christoph Hellwig *
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 *******************************************************************/
22 #include <linux/mempool.h>
23 #include <linux/pci.h>
24 #include <linux/interrupt.h>
26 #include <scsi/scsi_device.h>
27 #include <scsi/scsi_transport_fc.h>
29 #include <scsi/scsi.h>
33 #include "lpfc_disc.h"
34 #include "lpfc_scsi.h"
36 #include "lpfc_crtn.h"
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 */
43 * lpfc_mem_alloc: create and allocate all PCI and memory pools
44 * @phba: HBA to allocate pools for
46 * Description: Creates and allocates PCI pools lpfc_scsi_dma_buf_pool,
47 * lpfc_mbuf_pool, lpfc_hbq_pool. Creates and allocates kmalloc-backed mempools
48 * for LPFC_MBOXQ_t and lpfc_nodelist. Also allocates the VPI bitmask.
50 * Notes: Not interrupt-safe. Must be called with no locks held. If any
51 * allocation fails, frees all successfully allocated memory before returning.
55 * -ENOMEM on failure (if any memory allocations fail)
58 lpfc_mem_alloc(struct lpfc_hba * phba)
60 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
64 phba->lpfc_scsi_dma_buf_pool = pci_pool_create("lpfc_scsi_dma_buf_pool",
65 phba->pcidev, phba->cfg_sg_dma_buf_size, 8, 0);
66 if (!phba->lpfc_scsi_dma_buf_pool)
69 phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev,
71 if (!phba->lpfc_mbuf_pool)
72 goto fail_free_dma_buf_pool;
74 pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) *
75 LPFC_MBUF_POOL_SIZE, GFP_KERNEL);
77 goto fail_free_lpfc_mbuf_pool;
80 pool->current_count = 0;
81 for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
82 pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool,
83 GFP_KERNEL, &pool->elements[i].phys);
84 if (!pool->elements[i].virt)
85 goto fail_free_mbuf_pool;
87 pool->current_count++;
90 phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
91 sizeof(LPFC_MBOXQ_t));
92 if (!phba->mbox_mem_pool)
93 goto fail_free_mbuf_pool;
95 phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
96 sizeof(struct lpfc_nodelist));
97 if (!phba->nlp_mem_pool)
98 goto fail_free_mbox_pool;
100 phba->lpfc_hbq_pool = pci_pool_create("lpfc_hbq_pool",phba->pcidev,
101 LPFC_BPL_SIZE, 8, 0);
102 if (!phba->lpfc_hbq_pool)
103 goto fail_free_nlp_mem_pool;
105 /* vpi zero is reserved for the physical port so add 1 to max */
106 longs = ((phba->max_vpi + 1) + BITS_PER_LONG - 1) / BITS_PER_LONG;
107 phba->vpi_bmask = kzalloc(longs * sizeof(unsigned long), GFP_KERNEL);
108 if (!phba->vpi_bmask)
109 goto fail_free_hbq_pool;
114 lpfc_sli_hbqbuf_free_all(phba);
115 pci_pool_destroy(phba->lpfc_hbq_pool);
116 fail_free_nlp_mem_pool:
117 mempool_destroy(phba->nlp_mem_pool);
118 phba->nlp_mem_pool = NULL;
120 mempool_destroy(phba->mbox_mem_pool);
121 phba->mbox_mem_pool = NULL;
124 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
125 pool->elements[i].phys);
126 kfree(pool->elements);
127 fail_free_lpfc_mbuf_pool:
128 pci_pool_destroy(phba->lpfc_mbuf_pool);
129 phba->lpfc_mbuf_pool = NULL;
130 fail_free_dma_buf_pool:
131 pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
132 phba->lpfc_scsi_dma_buf_pool = NULL;
138 * lpfc_mem_free: Frees all PCI and memory allocated by lpfc_mem_alloc
139 * @phba: HBA to free memory for
141 * Description: Frees PCI pools lpfc_scsi_dma_buf_pool, lpfc_mbuf_pool,
142 * lpfc_hbq_pool. Frees kmalloc-backed mempools for LPFC_MBOXQ_t and
143 * lpfc_nodelist. Also frees the VPI bitmask.
148 lpfc_mem_free(struct lpfc_hba * phba)
150 struct lpfc_sli *psli = &phba->sli;
151 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
152 LPFC_MBOXQ_t *mbox, *next_mbox;
153 struct lpfc_dmabuf *mp;
156 kfree(phba->vpi_bmask);
157 lpfc_sli_hbqbuf_free_all(phba);
159 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
160 mp = (struct lpfc_dmabuf *) (mbox->context1);
162 lpfc_mbuf_free(phba, mp->virt, mp->phys);
165 list_del(&mbox->list);
166 mempool_free(mbox, phba->mbox_mem_pool);
168 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq_cmpl, list) {
169 mp = (struct lpfc_dmabuf *) (mbox->context1);
171 lpfc_mbuf_free(phba, mp->virt, mp->phys);
174 list_del(&mbox->list);
175 mempool_free(mbox, phba->mbox_mem_pool);
178 psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
179 if (psli->mbox_active) {
180 mbox = psli->mbox_active;
181 mp = (struct lpfc_dmabuf *) (mbox->context1);
183 lpfc_mbuf_free(phba, mp->virt, mp->phys);
186 mempool_free(mbox, phba->mbox_mem_pool);
187 psli->mbox_active = NULL;
190 for (i = 0; i < pool->current_count; i++)
191 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
192 pool->elements[i].phys);
193 kfree(pool->elements);
195 pci_pool_destroy(phba->lpfc_hbq_pool);
196 mempool_destroy(phba->nlp_mem_pool);
197 mempool_destroy(phba->mbox_mem_pool);
199 pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
200 pci_pool_destroy(phba->lpfc_mbuf_pool);
202 phba->lpfc_hbq_pool = NULL;
203 phba->nlp_mem_pool = NULL;
204 phba->mbox_mem_pool = NULL;
205 phba->lpfc_scsi_dma_buf_pool = NULL;
206 phba->lpfc_mbuf_pool = NULL;
208 /* Free the iocb lookup array */
209 kfree(psli->iocbq_lookup);
210 psli->iocbq_lookup = NULL;
214 * lpfc_mbuf_alloc: Allocate an mbuf from the lpfc_mbuf_pool PCI pool
215 * @phba: HBA which owns the pool to allocate from
216 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
217 * @handle: used to return the DMA-mapped address of the mbuf
219 * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool.
220 * Allocates from generic pci_pool_alloc function first and if that fails and
221 * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the
224 * Notes: Not interrupt-safe. Must be called with no locks held. Takes
228 * pointer to the allocated mbuf on success
232 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
234 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
235 unsigned long iflags;
238 ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
240 spin_lock_irqsave(&phba->hbalock, iflags);
241 if (!ret && (mem_flags & MEM_PRI) && pool->current_count) {
242 pool->current_count--;
243 ret = pool->elements[pool->current_count].virt;
244 *handle = pool->elements[pool->current_count].phys;
246 spin_unlock_irqrestore(&phba->hbalock, iflags);
251 * __lpfc_mem_free: Free an mbuf from the lpfc_mbuf_pool PCI pool (locked)
252 * @phba: HBA which owns the pool to return to
253 * @virt: mbuf to free
254 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
256 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
257 * it is below its max_count, frees the mbuf otherwise.
259 * Notes: Must be called with phba->hbalock held to synchronize access to
260 * lpfc_mbuf_safety_pool.
265 __lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
267 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
269 if (pool->current_count < pool->max_count) {
270 pool->elements[pool->current_count].virt = virt;
271 pool->elements[pool->current_count].phys = dma;
272 pool->current_count++;
274 pci_pool_free(phba->lpfc_mbuf_pool, virt, dma);
280 * lpfc_mem_free: Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked)
281 * @phba: HBA which owns the pool to return to
282 * @virt: mbuf to free
283 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
285 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
286 * it is below its max_count, frees the mbuf otherwise.
288 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
294 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
296 unsigned long iflags;
298 spin_lock_irqsave(&phba->hbalock, iflags);
299 __lpfc_mbuf_free(phba, virt, dma);
300 spin_unlock_irqrestore(&phba->hbalock, iflags);
305 * lpfc_els_hbq_alloc: Allocate an HBQ buffer
306 * @phba: HBA to allocate HBQ buffer for
308 * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hbq_pool PCI
309 * pool along a non-DMA-mapped container for it.
311 * Notes: Not interrupt-safe. Must be called with no locks held.
314 * pointer to HBQ on success
318 lpfc_els_hbq_alloc(struct lpfc_hba *phba)
320 struct hbq_dmabuf *hbqbp;
322 hbqbp = kmalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
326 hbqbp->dbuf.virt = pci_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL,
328 if (!hbqbp->dbuf.virt) {
332 hbqbp->size = LPFC_BPL_SIZE;
337 * lpfc_mem_hbq_free: Frees an HBQ buffer allocated with lpfc_els_hbq_alloc
338 * @phba: HBA buffer was allocated for
339 * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc
341 * Description: Frees both the container and the DMA-mapped buffer returned by
342 * lpfc_els_hbq_alloc.
344 * Notes: Can be called with or without locks held.
349 lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp)
351 pci_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys);
357 * lpfc_in_buf_free: Free a DMA buffer
358 * @phba: HBA buffer is associated with
359 * @mp: Buffer to free
361 * Description: Frees the given DMA buffer in the appropriate way given if the
362 * HBA is running in SLI3 mode with HBQs enabled.
364 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
369 lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
371 struct hbq_dmabuf *hbq_entry;
377 if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
378 /* Check whether HBQ is still in use */
379 spin_lock_irqsave(&phba->hbalock, flags);
380 if (!phba->hbq_in_use) {
381 spin_unlock_irqrestore(&phba->hbalock, flags);
384 hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf);
385 list_del(&hbq_entry->dbuf.list);
386 if (hbq_entry->tag == -1) {
387 (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
390 lpfc_sli_free_hbq(phba, hbq_entry);
392 spin_unlock_irqrestore(&phba->hbalock, flags);
394 lpfc_mbuf_free(phba, mp->virt, mp->phys);