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
;
68 if (phba
->sli_rev
== LPFC_SLI_REV4
)
69 phba
->lpfc_scsi_dma_buf_pool
=
70 pci_pool_create("lpfc_scsi_dma_buf_pool",
72 phba
->cfg_sg_dma_buf_size
,
73 phba
->cfg_sg_dma_buf_size
,
76 phba
->lpfc_scsi_dma_buf_pool
=
77 pci_pool_create("lpfc_scsi_dma_buf_pool",
78 phba
->pcidev
, phba
->cfg_sg_dma_buf_size
,
80 if (!phba
->lpfc_scsi_dma_buf_pool
)
83 phba
->lpfc_mbuf_pool
= pci_pool_create("lpfc_mbuf_pool", phba
->pcidev
,
86 if (!phba
->lpfc_mbuf_pool
)
87 goto fail_free_dma_buf_pool
;
89 pool
->elements
= kmalloc(sizeof(struct lpfc_dmabuf
) *
90 LPFC_MBUF_POOL_SIZE
, GFP_KERNEL
);
92 goto fail_free_lpfc_mbuf_pool
;
95 pool
->current_count
= 0;
96 for ( i
= 0; i
< LPFC_MBUF_POOL_SIZE
; i
++) {
97 pool
->elements
[i
].virt
= pci_pool_alloc(phba
->lpfc_mbuf_pool
,
98 GFP_KERNEL
, &pool
->elements
[i
].phys
);
99 if (!pool
->elements
[i
].virt
)
100 goto fail_free_mbuf_pool
;
102 pool
->current_count
++;
105 phba
->mbox_mem_pool
= mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE
,
106 sizeof(LPFC_MBOXQ_t
));
107 if (!phba
->mbox_mem_pool
)
108 goto fail_free_mbuf_pool
;
110 phba
->nlp_mem_pool
= mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE
,
111 sizeof(struct lpfc_nodelist
));
112 if (!phba
->nlp_mem_pool
)
113 goto fail_free_mbox_pool
;
115 if (phba
->sli_rev
== LPFC_SLI_REV4
) {
116 phba
->lpfc_hrb_pool
= pci_pool_create("lpfc_hrb_pool",
118 LPFC_HDR_BUF_SIZE
, align
, 0);
119 if (!phba
->lpfc_hrb_pool
)
120 goto fail_free_nlp_mem_pool
;
122 phba
->lpfc_drb_pool
= pci_pool_create("lpfc_drb_pool",
124 LPFC_DATA_BUF_SIZE
, align
, 0);
125 if (!phba
->lpfc_drb_pool
)
126 goto fail_free_hrb_pool
;
127 phba
->lpfc_hbq_pool
= NULL
;
129 phba
->lpfc_hbq_pool
= pci_pool_create("lpfc_hbq_pool",
130 phba
->pcidev
, LPFC_BPL_SIZE
, align
, 0);
131 if (!phba
->lpfc_hbq_pool
)
132 goto fail_free_nlp_mem_pool
;
133 phba
->lpfc_hrb_pool
= NULL
;
134 phba
->lpfc_drb_pool
= NULL
;
136 /* vpi zero is reserved for the physical port so add 1 to max */
137 longs
= ((phba
->max_vpi
+ 1) + BITS_PER_LONG
- 1) / BITS_PER_LONG
;
138 phba
->vpi_bmask
= kzalloc(longs
* sizeof(unsigned long), GFP_KERNEL
);
139 if (!phba
->vpi_bmask
)
140 goto fail_free_dbq_pool
;
145 pci_pool_destroy(phba
->lpfc_drb_pool
);
146 phba
->lpfc_drb_pool
= NULL
;
148 pci_pool_destroy(phba
->lpfc_hrb_pool
);
149 phba
->lpfc_hrb_pool
= NULL
;
150 fail_free_nlp_mem_pool
:
151 mempool_destroy(phba
->nlp_mem_pool
);
152 phba
->nlp_mem_pool
= NULL
;
154 mempool_destroy(phba
->mbox_mem_pool
);
155 phba
->mbox_mem_pool
= NULL
;
158 pci_pool_free(phba
->lpfc_mbuf_pool
, pool
->elements
[i
].virt
,
159 pool
->elements
[i
].phys
);
160 kfree(pool
->elements
);
161 fail_free_lpfc_mbuf_pool
:
162 pci_pool_destroy(phba
->lpfc_mbuf_pool
);
163 phba
->lpfc_mbuf_pool
= NULL
;
164 fail_free_dma_buf_pool
:
165 pci_pool_destroy(phba
->lpfc_scsi_dma_buf_pool
);
166 phba
->lpfc_scsi_dma_buf_pool
= NULL
;
172 * lpfc_mem_free - Frees memory allocated by lpfc_mem_alloc
173 * @phba: HBA to free memory for
175 * Description: Free the memory allocated by lpfc_mem_alloc routine. This
176 * routine is a the counterpart of lpfc_mem_alloc.
181 lpfc_mem_free(struct lpfc_hba
*phba
)
184 struct lpfc_dma_pool
*pool
= &phba
->lpfc_mbuf_safety_pool
;
186 /* Free VPI bitmask memory */
187 kfree(phba
->vpi_bmask
);
190 lpfc_sli_hbqbuf_free_all(phba
);
191 if (phba
->lpfc_drb_pool
)
192 pci_pool_destroy(phba
->lpfc_drb_pool
);
193 phba
->lpfc_drb_pool
= NULL
;
194 if (phba
->lpfc_hrb_pool
)
195 pci_pool_destroy(phba
->lpfc_hrb_pool
);
196 phba
->lpfc_hrb_pool
= NULL
;
198 if (phba
->lpfc_hbq_pool
)
199 pci_pool_destroy(phba
->lpfc_hbq_pool
);
200 phba
->lpfc_hbq_pool
= NULL
;
202 /* Free NLP memory pool */
203 mempool_destroy(phba
->nlp_mem_pool
);
204 phba
->nlp_mem_pool
= NULL
;
206 /* Free mbox memory pool */
207 mempool_destroy(phba
->mbox_mem_pool
);
208 phba
->mbox_mem_pool
= NULL
;
210 /* Free MBUF memory pool */
211 for (i
= 0; i
< pool
->current_count
; i
++)
212 pci_pool_free(phba
->lpfc_mbuf_pool
, pool
->elements
[i
].virt
,
213 pool
->elements
[i
].phys
);
214 kfree(pool
->elements
);
216 pci_pool_destroy(phba
->lpfc_mbuf_pool
);
217 phba
->lpfc_mbuf_pool
= NULL
;
219 /* Free DMA buffer memory pool */
220 pci_pool_destroy(phba
->lpfc_scsi_dma_buf_pool
);
221 phba
->lpfc_scsi_dma_buf_pool
= NULL
;
227 * lpfc_mem_free_all - Frees all PCI and driver memory
228 * @phba: HBA to free memory for
230 * Description: Free memory from PCI and driver memory pools and also those
231 * used : lpfc_scsi_dma_buf_pool, lpfc_mbuf_pool, lpfc_hrb_pool. Frees
232 * kmalloc-backed mempools for LPFC_MBOXQ_t and lpfc_nodelist. Also frees
238 lpfc_mem_free_all(struct lpfc_hba
*phba
)
240 struct lpfc_sli
*psli
= &phba
->sli
;
241 LPFC_MBOXQ_t
*mbox
, *next_mbox
;
242 struct lpfc_dmabuf
*mp
;
244 /* Free memory used in mailbox queue back to mailbox memory pool */
245 list_for_each_entry_safe(mbox
, next_mbox
, &psli
->mboxq
, list
) {
246 mp
= (struct lpfc_dmabuf
*) (mbox
->context1
);
248 lpfc_mbuf_free(phba
, mp
->virt
, mp
->phys
);
251 list_del(&mbox
->list
);
252 mempool_free(mbox
, phba
->mbox_mem_pool
);
254 /* Free memory used in mailbox cmpl list back to mailbox memory pool */
255 list_for_each_entry_safe(mbox
, next_mbox
, &psli
->mboxq_cmpl
, list
) {
256 mp
= (struct lpfc_dmabuf
*) (mbox
->context1
);
258 lpfc_mbuf_free(phba
, mp
->virt
, mp
->phys
);
261 list_del(&mbox
->list
);
262 mempool_free(mbox
, phba
->mbox_mem_pool
);
264 /* Free the active mailbox command back to the mailbox memory pool */
265 spin_lock_irq(&phba
->hbalock
);
266 psli
->sli_flag
&= ~LPFC_SLI_MBOX_ACTIVE
;
267 spin_unlock_irq(&phba
->hbalock
);
268 if (psli
->mbox_active
) {
269 mbox
= psli
->mbox_active
;
270 mp
= (struct lpfc_dmabuf
*) (mbox
->context1
);
272 lpfc_mbuf_free(phba
, mp
->virt
, mp
->phys
);
275 mempool_free(mbox
, phba
->mbox_mem_pool
);
276 psli
->mbox_active
= NULL
;
279 /* Free and destroy all the allocated memory pools */
282 /* Free the iocb lookup array */
283 kfree(psli
->iocbq_lookup
);
284 psli
->iocbq_lookup
= NULL
;
290 * lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool
291 * @phba: HBA which owns the pool to allocate from
292 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
293 * @handle: used to return the DMA-mapped address of the mbuf
295 * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool.
296 * Allocates from generic pci_pool_alloc function first and if that fails and
297 * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the
300 * Notes: Not interrupt-safe. Must be called with no locks held. Takes
304 * pointer to the allocated mbuf on success
308 lpfc_mbuf_alloc(struct lpfc_hba
*phba
, int mem_flags
, dma_addr_t
*handle
)
310 struct lpfc_dma_pool
*pool
= &phba
->lpfc_mbuf_safety_pool
;
311 unsigned long iflags
;
314 ret
= pci_pool_alloc(phba
->lpfc_mbuf_pool
, GFP_KERNEL
, handle
);
316 spin_lock_irqsave(&phba
->hbalock
, iflags
);
317 if (!ret
&& (mem_flags
& MEM_PRI
) && pool
->current_count
) {
318 pool
->current_count
--;
319 ret
= pool
->elements
[pool
->current_count
].virt
;
320 *handle
= pool
->elements
[pool
->current_count
].phys
;
322 spin_unlock_irqrestore(&phba
->hbalock
, iflags
);
327 * __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked)
328 * @phba: HBA which owns the pool to return to
329 * @virt: mbuf to free
330 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
332 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
333 * it is below its max_count, frees the mbuf otherwise.
335 * Notes: Must be called with phba->hbalock held to synchronize access to
336 * lpfc_mbuf_safety_pool.
341 __lpfc_mbuf_free(struct lpfc_hba
* phba
, void *virt
, dma_addr_t dma
)
343 struct lpfc_dma_pool
*pool
= &phba
->lpfc_mbuf_safety_pool
;
345 if (pool
->current_count
< pool
->max_count
) {
346 pool
->elements
[pool
->current_count
].virt
= virt
;
347 pool
->elements
[pool
->current_count
].phys
= dma
;
348 pool
->current_count
++;
350 pci_pool_free(phba
->lpfc_mbuf_pool
, virt
, dma
);
356 * lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked)
357 * @phba: HBA which owns the pool to return to
358 * @virt: mbuf to free
359 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
361 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
362 * it is below its max_count, frees the mbuf otherwise.
364 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
369 lpfc_mbuf_free(struct lpfc_hba
* phba
, void *virt
, dma_addr_t dma
)
371 unsigned long iflags
;
373 spin_lock_irqsave(&phba
->hbalock
, iflags
);
374 __lpfc_mbuf_free(phba
, virt
, dma
);
375 spin_unlock_irqrestore(&phba
->hbalock
, iflags
);
380 * lpfc_els_hbq_alloc - Allocate an HBQ buffer
381 * @phba: HBA to allocate HBQ buffer for
383 * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hrb_pool PCI
384 * pool along a non-DMA-mapped container for it.
386 * Notes: Not interrupt-safe. Must be called with no locks held.
389 * pointer to HBQ on success
393 lpfc_els_hbq_alloc(struct lpfc_hba
*phba
)
395 struct hbq_dmabuf
*hbqbp
;
397 hbqbp
= kmalloc(sizeof(struct hbq_dmabuf
), GFP_KERNEL
);
401 hbqbp
->dbuf
.virt
= pci_pool_alloc(phba
->lpfc_hbq_pool
, GFP_KERNEL
,
403 if (!hbqbp
->dbuf
.virt
) {
407 hbqbp
->size
= LPFC_BPL_SIZE
;
412 * lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc
413 * @phba: HBA buffer was allocated for
414 * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc
416 * Description: Frees both the container and the DMA-mapped buffer returned by
417 * lpfc_els_hbq_alloc.
419 * Notes: Can be called with or without locks held.
424 lpfc_els_hbq_free(struct lpfc_hba
*phba
, struct hbq_dmabuf
*hbqbp
)
426 pci_pool_free(phba
->lpfc_hbq_pool
, hbqbp
->dbuf
.virt
, hbqbp
->dbuf
.phys
);
432 * lpfc_sli4_rb_alloc - Allocate an SLI4 Receive buffer
433 * @phba: HBA to allocate a receive buffer for
435 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
436 * pool along a non-DMA-mapped container for it.
438 * Notes: Not interrupt-safe. Must be called with no locks held.
441 * pointer to HBQ on success
445 lpfc_sli4_rb_alloc(struct lpfc_hba
*phba
)
447 struct hbq_dmabuf
*dma_buf
;
449 dma_buf
= kmalloc(sizeof(struct hbq_dmabuf
), GFP_KERNEL
);
453 dma_buf
->hbuf
.virt
= pci_pool_alloc(phba
->lpfc_hrb_pool
, GFP_KERNEL
,
454 &dma_buf
->hbuf
.phys
);
455 if (!dma_buf
->hbuf
.virt
) {
459 dma_buf
->dbuf
.virt
= pci_pool_alloc(phba
->lpfc_drb_pool
, GFP_KERNEL
,
460 &dma_buf
->dbuf
.phys
);
461 if (!dma_buf
->dbuf
.virt
) {
462 pci_pool_free(phba
->lpfc_hrb_pool
, dma_buf
->hbuf
.virt
,
467 dma_buf
->size
= LPFC_BPL_SIZE
;
472 * lpfc_sli4_rb_free - Frees a receive buffer
473 * @phba: HBA buffer was allocated for
474 * @dmab: DMA Buffer container returned by lpfc_sli4_hbq_alloc
476 * Description: Frees both the container and the DMA-mapped buffers returned by
477 * lpfc_sli4_rb_alloc.
479 * Notes: Can be called with or without locks held.
484 lpfc_sli4_rb_free(struct lpfc_hba
*phba
, struct hbq_dmabuf
*dmab
)
486 pci_pool_free(phba
->lpfc_hrb_pool
, dmab
->hbuf
.virt
, dmab
->hbuf
.phys
);
487 pci_pool_free(phba
->lpfc_drb_pool
, dmab
->dbuf
.virt
, dmab
->dbuf
.phys
);
493 * lpfc_in_buf_free - Free a DMA buffer
494 * @phba: HBA buffer is associated with
495 * @mp: Buffer to free
497 * Description: Frees the given DMA buffer in the appropriate way given if the
498 * HBA is running in SLI3 mode with HBQs enabled.
500 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
505 lpfc_in_buf_free(struct lpfc_hba
*phba
, struct lpfc_dmabuf
*mp
)
507 struct hbq_dmabuf
*hbq_entry
;
513 if (phba
->sli3_options
& LPFC_SLI3_HBQ_ENABLED
) {
514 /* Check whether HBQ is still in use */
515 spin_lock_irqsave(&phba
->hbalock
, flags
);
516 if (!phba
->hbq_in_use
) {
517 spin_unlock_irqrestore(&phba
->hbalock
, flags
);
520 hbq_entry
= container_of(mp
, struct hbq_dmabuf
, dbuf
);
521 list_del(&hbq_entry
->dbuf
.list
);
522 if (hbq_entry
->tag
== -1) {
523 (phba
->hbqs
[LPFC_ELS_HBQ
].hbq_free_buffer
)
526 lpfc_sli_free_hbq(phba
, hbq_entry
);
528 spin_unlock_irqrestore(&phba
->hbalock
, flags
);
530 lpfc_mbuf_free(phba
, mp
->virt
, mp
->phys
);