1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2009 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/slab.h>
24 #include <linux/pci.h>
25 #include <linux/interrupt.h>
27 #include <scsi/scsi_device.h>
28 #include <scsi/scsi_transport_fc.h>
30 #include <scsi/scsi.h>
35 #include "lpfc_sli4.h"
37 #include "lpfc_disc.h"
38 #include "lpfc_scsi.h"
40 #include "lpfc_crtn.h"
42 #define LPFC_MBUF_POOL_SIZE 64 /* max elements in MBUF safety pool */
43 #define LPFC_MEM_POOL_SIZE 64 /* max elem in non-DMA safety pool */
47 * lpfc_mem_alloc - create and allocate all PCI and memory pools
48 * @phba: HBA to allocate pools for
50 * Description: Creates and allocates PCI pools lpfc_scsi_dma_buf_pool,
51 * lpfc_mbuf_pool, lpfc_hrb_pool. Creates and allocates kmalloc-backed mempools
52 * for LPFC_MBOXQ_t and lpfc_nodelist. Also allocates the VPI bitmask.
54 * Notes: Not interrupt-safe. Must be called with no locks held. If any
55 * allocation fails, frees all successfully allocated memory before returning.
59 * -ENOMEM on failure (if any memory allocations fail)
62 lpfc_mem_alloc(struct lpfc_hba *phba, int align)
64 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
67 if (phba->sli_rev == LPFC_SLI_REV4)
68 phba->lpfc_scsi_dma_buf_pool =
69 pci_pool_create("lpfc_scsi_dma_buf_pool",
71 phba->cfg_sg_dma_buf_size,
72 phba->cfg_sg_dma_buf_size,
75 phba->lpfc_scsi_dma_buf_pool =
76 pci_pool_create("lpfc_scsi_dma_buf_pool",
77 phba->pcidev, phba->cfg_sg_dma_buf_size,
79 if (!phba->lpfc_scsi_dma_buf_pool)
82 phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev,
85 if (!phba->lpfc_mbuf_pool)
86 goto fail_free_dma_buf_pool;
88 pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) *
89 LPFC_MBUF_POOL_SIZE, GFP_KERNEL);
91 goto fail_free_lpfc_mbuf_pool;
94 pool->current_count = 0;
95 for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
96 pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool,
97 GFP_KERNEL, &pool->elements[i].phys);
98 if (!pool->elements[i].virt)
99 goto fail_free_mbuf_pool;
101 pool->current_count++;
104 phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
105 sizeof(LPFC_MBOXQ_t));
106 if (!phba->mbox_mem_pool)
107 goto fail_free_mbuf_pool;
109 phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
110 sizeof(struct lpfc_nodelist));
111 if (!phba->nlp_mem_pool)
112 goto fail_free_mbox_pool;
114 if (phba->sli_rev == LPFC_SLI_REV4) {
116 mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
117 sizeof(struct lpfc_node_rrq));
119 goto fail_free_nlp_mem_pool;
120 phba->lpfc_hrb_pool = pci_pool_create("lpfc_hrb_pool",
122 LPFC_HDR_BUF_SIZE, align, 0);
123 if (!phba->lpfc_hrb_pool)
124 goto fail_free_rrq_mem_pool;
126 phba->lpfc_drb_pool = pci_pool_create("lpfc_drb_pool",
128 LPFC_DATA_BUF_SIZE, align, 0);
129 if (!phba->lpfc_drb_pool)
130 goto fail_free_hrb_pool;
131 phba->lpfc_hbq_pool = NULL;
133 phba->lpfc_hbq_pool = pci_pool_create("lpfc_hbq_pool",
134 phba->pcidev, LPFC_BPL_SIZE, align, 0);
135 if (!phba->lpfc_hbq_pool)
136 goto fail_free_nlp_mem_pool;
137 phba->lpfc_hrb_pool = NULL;
138 phba->lpfc_drb_pool = NULL;
143 pci_pool_destroy(phba->lpfc_hrb_pool);
144 phba->lpfc_hrb_pool = NULL;
145 fail_free_rrq_mem_pool:
146 mempool_destroy(phba->rrq_pool);
147 phba->rrq_pool = NULL;
148 fail_free_nlp_mem_pool:
149 mempool_destroy(phba->nlp_mem_pool);
150 phba->nlp_mem_pool = NULL;
152 mempool_destroy(phba->mbox_mem_pool);
153 phba->mbox_mem_pool = NULL;
156 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
157 pool->elements[i].phys);
158 kfree(pool->elements);
159 fail_free_lpfc_mbuf_pool:
160 pci_pool_destroy(phba->lpfc_mbuf_pool);
161 phba->lpfc_mbuf_pool = NULL;
162 fail_free_dma_buf_pool:
163 pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
164 phba->lpfc_scsi_dma_buf_pool = NULL;
170 * lpfc_mem_free - Frees memory allocated by lpfc_mem_alloc
171 * @phba: HBA to free memory for
173 * Description: Free the memory allocated by lpfc_mem_alloc routine. This
174 * routine is a the counterpart of lpfc_mem_alloc.
179 lpfc_mem_free(struct lpfc_hba *phba)
182 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
185 lpfc_sli_hbqbuf_free_all(phba);
186 if (phba->lpfc_drb_pool)
187 pci_pool_destroy(phba->lpfc_drb_pool);
188 phba->lpfc_drb_pool = NULL;
189 if (phba->lpfc_hrb_pool)
190 pci_pool_destroy(phba->lpfc_hrb_pool);
191 phba->lpfc_hrb_pool = NULL;
193 if (phba->lpfc_hbq_pool)
194 pci_pool_destroy(phba->lpfc_hbq_pool);
195 phba->lpfc_hbq_pool = NULL;
197 /* Free NLP memory pool */
198 mempool_destroy(phba->nlp_mem_pool);
199 phba->nlp_mem_pool = NULL;
201 /* Free mbox memory pool */
202 mempool_destroy(phba->mbox_mem_pool);
203 phba->mbox_mem_pool = NULL;
205 /* Free MBUF memory pool */
206 for (i = 0; i < pool->current_count; i++)
207 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
208 pool->elements[i].phys);
209 kfree(pool->elements);
211 pci_pool_destroy(phba->lpfc_mbuf_pool);
212 phba->lpfc_mbuf_pool = NULL;
214 /* Free DMA buffer memory pool */
215 pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
216 phba->lpfc_scsi_dma_buf_pool = NULL;
222 * lpfc_mem_free_all - Frees all PCI and driver memory
223 * @phba: HBA to free memory for
225 * Description: Free memory from PCI and driver memory pools and also those
226 * used : lpfc_scsi_dma_buf_pool, lpfc_mbuf_pool, lpfc_hrb_pool. Frees
227 * kmalloc-backed mempools for LPFC_MBOXQ_t and lpfc_nodelist. Also frees
233 lpfc_mem_free_all(struct lpfc_hba *phba)
235 struct lpfc_sli *psli = &phba->sli;
236 LPFC_MBOXQ_t *mbox, *next_mbox;
237 struct lpfc_dmabuf *mp;
239 /* Free memory used in mailbox queue back to mailbox memory pool */
240 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
241 mp = (struct lpfc_dmabuf *) (mbox->context1);
243 lpfc_mbuf_free(phba, mp->virt, mp->phys);
246 list_del(&mbox->list);
247 mempool_free(mbox, phba->mbox_mem_pool);
249 /* Free memory used in mailbox cmpl list back to mailbox memory pool */
250 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq_cmpl, list) {
251 mp = (struct lpfc_dmabuf *) (mbox->context1);
253 lpfc_mbuf_free(phba, mp->virt, mp->phys);
256 list_del(&mbox->list);
257 mempool_free(mbox, phba->mbox_mem_pool);
259 /* Free the active mailbox command back to the mailbox memory pool */
260 spin_lock_irq(&phba->hbalock);
261 psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
262 spin_unlock_irq(&phba->hbalock);
263 if (psli->mbox_active) {
264 mbox = psli->mbox_active;
265 mp = (struct lpfc_dmabuf *) (mbox->context1);
267 lpfc_mbuf_free(phba, mp->virt, mp->phys);
270 mempool_free(mbox, phba->mbox_mem_pool);
271 psli->mbox_active = NULL;
274 /* Free and destroy all the allocated memory pools */
277 /* Free the iocb lookup array */
278 kfree(psli->iocbq_lookup);
279 psli->iocbq_lookup = NULL;
285 * lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool
286 * @phba: HBA which owns the pool to allocate from
287 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
288 * @handle: used to return the DMA-mapped address of the mbuf
290 * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool.
291 * Allocates from generic pci_pool_alloc function first and if that fails and
292 * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the
295 * Notes: Not interrupt-safe. Must be called with no locks held. Takes
299 * pointer to the allocated mbuf on success
303 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
305 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
306 unsigned long iflags;
309 ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
311 spin_lock_irqsave(&phba->hbalock, iflags);
312 if (!ret && (mem_flags & MEM_PRI) && pool->current_count) {
313 pool->current_count--;
314 ret = pool->elements[pool->current_count].virt;
315 *handle = pool->elements[pool->current_count].phys;
317 spin_unlock_irqrestore(&phba->hbalock, iflags);
322 * __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked)
323 * @phba: HBA which owns the pool to return to
324 * @virt: mbuf to free
325 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
327 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
328 * it is below its max_count, frees the mbuf otherwise.
330 * Notes: Must be called with phba->hbalock held to synchronize access to
331 * lpfc_mbuf_safety_pool.
336 __lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
338 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
340 if (pool->current_count < pool->max_count) {
341 pool->elements[pool->current_count].virt = virt;
342 pool->elements[pool->current_count].phys = dma;
343 pool->current_count++;
345 pci_pool_free(phba->lpfc_mbuf_pool, virt, dma);
351 * lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked)
352 * @phba: HBA which owns the pool to return to
353 * @virt: mbuf to free
354 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
356 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
357 * it is below its max_count, frees the mbuf otherwise.
359 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
364 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
366 unsigned long iflags;
368 spin_lock_irqsave(&phba->hbalock, iflags);
369 __lpfc_mbuf_free(phba, virt, dma);
370 spin_unlock_irqrestore(&phba->hbalock, iflags);
375 * lpfc_els_hbq_alloc - Allocate an HBQ buffer
376 * @phba: HBA to allocate HBQ buffer for
378 * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hrb_pool PCI
379 * pool along a non-DMA-mapped container for it.
381 * Notes: Not interrupt-safe. Must be called with no locks held.
384 * pointer to HBQ on success
388 lpfc_els_hbq_alloc(struct lpfc_hba *phba)
390 struct hbq_dmabuf *hbqbp;
392 hbqbp = kmalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
396 hbqbp->dbuf.virt = pci_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL,
398 if (!hbqbp->dbuf.virt) {
402 hbqbp->size = LPFC_BPL_SIZE;
407 * lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc
408 * @phba: HBA buffer was allocated for
409 * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc
411 * Description: Frees both the container and the DMA-mapped buffer returned by
412 * lpfc_els_hbq_alloc.
414 * Notes: Can be called with or without locks held.
419 lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp)
421 pci_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys);
427 * lpfc_sli4_rb_alloc - Allocate an SLI4 Receive buffer
428 * @phba: HBA to allocate a receive buffer for
430 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
431 * pool along a non-DMA-mapped container for it.
433 * Notes: Not interrupt-safe. Must be called with no locks held.
436 * pointer to HBQ on success
440 lpfc_sli4_rb_alloc(struct lpfc_hba *phba)
442 struct hbq_dmabuf *dma_buf;
444 dma_buf = kmalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
448 dma_buf->hbuf.virt = pci_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
449 &dma_buf->hbuf.phys);
450 if (!dma_buf->hbuf.virt) {
454 dma_buf->dbuf.virt = pci_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL,
455 &dma_buf->dbuf.phys);
456 if (!dma_buf->dbuf.virt) {
457 pci_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
462 dma_buf->size = LPFC_BPL_SIZE;
467 * lpfc_sli4_rb_free - Frees a receive buffer
468 * @phba: HBA buffer was allocated for
469 * @dmab: DMA Buffer container returned by lpfc_sli4_hbq_alloc
471 * Description: Frees both the container and the DMA-mapped buffers returned by
472 * lpfc_sli4_rb_alloc.
474 * Notes: Can be called with or without locks held.
479 lpfc_sli4_rb_free(struct lpfc_hba *phba, struct hbq_dmabuf *dmab)
481 pci_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
482 pci_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys);
488 * lpfc_in_buf_free - Free a DMA buffer
489 * @phba: HBA buffer is associated with
490 * @mp: Buffer to free
492 * Description: Frees the given DMA buffer in the appropriate way given if the
493 * HBA is running in SLI3 mode with HBQs enabled.
495 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
500 lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
502 struct hbq_dmabuf *hbq_entry;
508 if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
509 /* Check whether HBQ is still in use */
510 spin_lock_irqsave(&phba->hbalock, flags);
511 if (!phba->hbq_in_use) {
512 spin_unlock_irqrestore(&phba->hbalock, flags);
515 hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf);
516 list_del(&hbq_entry->dbuf.list);
517 if (hbq_entry->tag == -1) {
518 (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
521 lpfc_sli_free_hbq(phba, hbq_entry);
523 spin_unlock_irqrestore(&phba->hbalock, flags);
525 lpfc_mbuf_free(phba, mp->virt, mp->phys);