1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2014 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"
41 #include "lpfc_logmsg.h"
43 #define LPFC_MBUF_POOL_SIZE 64 /* max elements in MBUF safety pool */
44 #define LPFC_MEM_POOL_SIZE 64 /* max elem in non-DMA safety pool */
45 #define LPFC_DEVICE_DATA_POOL_SIZE 64 /* max elements in device data pool */
48 lpfc_mem_alloc_active_rrq_pool_s4(struct lpfc_hba *phba) {
50 int max_xri = phba->sli4_hba.max_cfg_param.max_xri;
54 bytes = ((BITS_PER_LONG - 1 + max_xri) / BITS_PER_LONG) *
55 sizeof(unsigned long);
56 phba->cfg_rrq_xri_bitmap_sz = bytes;
57 phba->active_rrq_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
59 if (!phba->active_rrq_pool)
66 * lpfc_mem_alloc - create and allocate all PCI and memory pools
67 * @phba: HBA to allocate pools for
69 * Description: Creates and allocates PCI pools lpfc_scsi_dma_buf_pool,
70 * lpfc_mbuf_pool, lpfc_hrb_pool. Creates and allocates kmalloc-backed mempools
71 * for LPFC_MBOXQ_t and lpfc_nodelist. Also allocates the VPI bitmask.
73 * Notes: Not interrupt-safe. Must be called with no locks held. If any
74 * allocation fails, frees all successfully allocated memory before returning.
78 * -ENOMEM on failure (if any memory allocations fail)
81 lpfc_mem_alloc(struct lpfc_hba *phba, int align)
83 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
86 if (phba->sli_rev == LPFC_SLI_REV4) {
87 /* Calculate alignment */
88 if (phba->cfg_sg_dma_buf_size < SLI4_PAGE_SIZE)
89 i = phba->cfg_sg_dma_buf_size;
93 phba->lpfc_scsi_dma_buf_pool =
94 pci_pool_create("lpfc_scsi_dma_buf_pool",
96 phba->cfg_sg_dma_buf_size,
100 phba->lpfc_scsi_dma_buf_pool =
101 pci_pool_create("lpfc_scsi_dma_buf_pool",
102 phba->pcidev, phba->cfg_sg_dma_buf_size,
106 if (!phba->lpfc_scsi_dma_buf_pool)
109 phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev,
112 if (!phba->lpfc_mbuf_pool)
113 goto fail_free_dma_buf_pool;
115 pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) *
116 LPFC_MBUF_POOL_SIZE, GFP_KERNEL);
118 goto fail_free_lpfc_mbuf_pool;
121 pool->current_count = 0;
122 for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
123 pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool,
124 GFP_KERNEL, &pool->elements[i].phys);
125 if (!pool->elements[i].virt)
126 goto fail_free_mbuf_pool;
128 pool->current_count++;
131 phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
132 sizeof(LPFC_MBOXQ_t));
133 if (!phba->mbox_mem_pool)
134 goto fail_free_mbuf_pool;
136 phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
137 sizeof(struct lpfc_nodelist));
138 if (!phba->nlp_mem_pool)
139 goto fail_free_mbox_pool;
141 if (phba->sli_rev == LPFC_SLI_REV4) {
143 mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
144 sizeof(struct lpfc_node_rrq));
146 goto fail_free_nlp_mem_pool;
147 phba->lpfc_hrb_pool = pci_pool_create("lpfc_hrb_pool",
149 LPFC_HDR_BUF_SIZE, align, 0);
150 if (!phba->lpfc_hrb_pool)
151 goto fail_free_rrq_mem_pool;
153 phba->lpfc_drb_pool = pci_pool_create("lpfc_drb_pool",
155 LPFC_DATA_BUF_SIZE, align, 0);
156 if (!phba->lpfc_drb_pool)
157 goto fail_free_hrb_pool;
158 phba->lpfc_hbq_pool = NULL;
160 phba->lpfc_hbq_pool = pci_pool_create("lpfc_hbq_pool",
161 phba->pcidev, LPFC_BPL_SIZE, align, 0);
162 if (!phba->lpfc_hbq_pool)
163 goto fail_free_nlp_mem_pool;
164 phba->lpfc_hrb_pool = NULL;
165 phba->lpfc_drb_pool = NULL;
168 if (phba->cfg_EnableXLane) {
169 phba->device_data_mem_pool = mempool_create_kmalloc_pool(
170 LPFC_DEVICE_DATA_POOL_SIZE,
171 sizeof(struct lpfc_device_data));
172 if (!phba->device_data_mem_pool)
173 goto fail_free_hrb_pool;
175 phba->device_data_mem_pool = NULL;
180 pci_pool_destroy(phba->lpfc_hrb_pool);
181 phba->lpfc_hrb_pool = NULL;
182 fail_free_rrq_mem_pool:
183 mempool_destroy(phba->rrq_pool);
184 phba->rrq_pool = NULL;
185 fail_free_nlp_mem_pool:
186 mempool_destroy(phba->nlp_mem_pool);
187 phba->nlp_mem_pool = NULL;
189 mempool_destroy(phba->mbox_mem_pool);
190 phba->mbox_mem_pool = NULL;
193 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
194 pool->elements[i].phys);
195 kfree(pool->elements);
196 fail_free_lpfc_mbuf_pool:
197 pci_pool_destroy(phba->lpfc_mbuf_pool);
198 phba->lpfc_mbuf_pool = NULL;
199 fail_free_dma_buf_pool:
200 pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
201 phba->lpfc_scsi_dma_buf_pool = NULL;
207 * lpfc_mem_free - Frees memory allocated by lpfc_mem_alloc
208 * @phba: HBA to free memory for
210 * Description: Free the memory allocated by lpfc_mem_alloc routine. This
211 * routine is a the counterpart of lpfc_mem_alloc.
216 lpfc_mem_free(struct lpfc_hba *phba)
219 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
220 struct lpfc_device_data *device_data;
223 lpfc_sli_hbqbuf_free_all(phba);
224 if (phba->lpfc_drb_pool)
225 pci_pool_destroy(phba->lpfc_drb_pool);
226 phba->lpfc_drb_pool = NULL;
227 if (phba->lpfc_hrb_pool)
228 pci_pool_destroy(phba->lpfc_hrb_pool);
229 phba->lpfc_hrb_pool = NULL;
231 if (phba->lpfc_hbq_pool)
232 pci_pool_destroy(phba->lpfc_hbq_pool);
233 phba->lpfc_hbq_pool = NULL;
234 mempool_destroy(phba->rrq_pool);
235 phba->rrq_pool = NULL;
237 /* Free NLP memory pool */
238 mempool_destroy(phba->nlp_mem_pool);
239 phba->nlp_mem_pool = NULL;
240 if (phba->sli_rev == LPFC_SLI_REV4) {
241 mempool_destroy(phba->active_rrq_pool);
242 phba->active_rrq_pool = NULL;
245 /* Free mbox memory pool */
246 mempool_destroy(phba->mbox_mem_pool);
247 phba->mbox_mem_pool = NULL;
249 /* Free MBUF memory pool */
250 for (i = 0; i < pool->current_count; i++)
251 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
252 pool->elements[i].phys);
253 kfree(pool->elements);
255 pci_pool_destroy(phba->lpfc_mbuf_pool);
256 phba->lpfc_mbuf_pool = NULL;
258 /* Free DMA buffer memory pool */
259 pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool);
260 phba->lpfc_scsi_dma_buf_pool = NULL;
262 /* Free Device Data memory pool */
263 if (phba->device_data_mem_pool) {
264 /* Ensure all objects have been returned to the pool */
265 while (!list_empty(&phba->luns)) {
266 device_data = list_first_entry(&phba->luns,
267 struct lpfc_device_data,
269 list_del(&device_data->listentry);
270 mempool_free(device_data, phba->device_data_mem_pool);
272 mempool_destroy(phba->device_data_mem_pool);
274 phba->device_data_mem_pool = NULL;
279 * lpfc_mem_free_all - Frees all PCI and driver memory
280 * @phba: HBA to free memory for
282 * Description: Free memory from PCI and driver memory pools and also those
283 * used : lpfc_scsi_dma_buf_pool, lpfc_mbuf_pool, lpfc_hrb_pool. Frees
284 * kmalloc-backed mempools for LPFC_MBOXQ_t and lpfc_nodelist. Also frees
290 lpfc_mem_free_all(struct lpfc_hba *phba)
292 struct lpfc_sli *psli = &phba->sli;
293 LPFC_MBOXQ_t *mbox, *next_mbox;
294 struct lpfc_dmabuf *mp;
296 /* Free memory used in mailbox queue back to mailbox memory pool */
297 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
298 mp = (struct lpfc_dmabuf *) (mbox->context1);
300 lpfc_mbuf_free(phba, mp->virt, mp->phys);
303 list_del(&mbox->list);
304 mempool_free(mbox, phba->mbox_mem_pool);
306 /* Free memory used in mailbox cmpl list back to mailbox memory pool */
307 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq_cmpl, list) {
308 mp = (struct lpfc_dmabuf *) (mbox->context1);
310 lpfc_mbuf_free(phba, mp->virt, mp->phys);
313 list_del(&mbox->list);
314 mempool_free(mbox, phba->mbox_mem_pool);
316 /* Free the active mailbox command back to the mailbox memory pool */
317 spin_lock_irq(&phba->hbalock);
318 psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
319 spin_unlock_irq(&phba->hbalock);
320 if (psli->mbox_active) {
321 mbox = psli->mbox_active;
322 mp = (struct lpfc_dmabuf *) (mbox->context1);
324 lpfc_mbuf_free(phba, mp->virt, mp->phys);
327 mempool_free(mbox, phba->mbox_mem_pool);
328 psli->mbox_active = NULL;
331 /* Free and destroy all the allocated memory pools */
334 /* Free the iocb lookup array */
335 kfree(psli->iocbq_lookup);
336 psli->iocbq_lookup = NULL;
342 * lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool
343 * @phba: HBA which owns the pool to allocate from
344 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
345 * @handle: used to return the DMA-mapped address of the mbuf
347 * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool.
348 * Allocates from generic pci_pool_alloc function first and if that fails and
349 * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the
352 * Notes: Not interrupt-safe. Must be called with no locks held. Takes
356 * pointer to the allocated mbuf on success
360 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
362 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
363 unsigned long iflags;
366 ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
368 spin_lock_irqsave(&phba->hbalock, iflags);
369 if (!ret && (mem_flags & MEM_PRI) && pool->current_count) {
370 pool->current_count--;
371 ret = pool->elements[pool->current_count].virt;
372 *handle = pool->elements[pool->current_count].phys;
374 spin_unlock_irqrestore(&phba->hbalock, iflags);
379 * __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked)
380 * @phba: HBA which owns the pool to return to
381 * @virt: mbuf to free
382 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
384 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
385 * it is below its max_count, frees the mbuf otherwise.
387 * Notes: Must be called with phba->hbalock held to synchronize access to
388 * lpfc_mbuf_safety_pool.
393 __lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
395 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
397 if (pool->current_count < pool->max_count) {
398 pool->elements[pool->current_count].virt = virt;
399 pool->elements[pool->current_count].phys = dma;
400 pool->current_count++;
402 pci_pool_free(phba->lpfc_mbuf_pool, virt, dma);
408 * lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked)
409 * @phba: HBA which owns the pool to return to
410 * @virt: mbuf to free
411 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
413 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
414 * it is below its max_count, frees the mbuf otherwise.
416 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
421 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
423 unsigned long iflags;
425 spin_lock_irqsave(&phba->hbalock, iflags);
426 __lpfc_mbuf_free(phba, virt, dma);
427 spin_unlock_irqrestore(&phba->hbalock, iflags);
432 * lpfc_els_hbq_alloc - Allocate an HBQ buffer
433 * @phba: HBA to allocate HBQ buffer for
435 * Description: Allocates a DMA-mapped HBQ 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_els_hbq_alloc(struct lpfc_hba *phba)
447 struct hbq_dmabuf *hbqbp;
449 hbqbp = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
453 hbqbp->dbuf.virt = pci_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL,
455 if (!hbqbp->dbuf.virt) {
459 hbqbp->size = LPFC_BPL_SIZE;
464 * lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc
465 * @phba: HBA buffer was allocated for
466 * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc
468 * Description: Frees both the container and the DMA-mapped buffer returned by
469 * lpfc_els_hbq_alloc.
471 * Notes: Can be called with or without locks held.
476 lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp)
478 pci_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys);
484 * lpfc_sli4_rb_alloc - Allocate an SLI4 Receive buffer
485 * @phba: HBA to allocate a receive buffer for
487 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
488 * pool along a non-DMA-mapped container for it.
490 * Notes: Not interrupt-safe. Must be called with no locks held.
493 * pointer to HBQ on success
497 lpfc_sli4_rb_alloc(struct lpfc_hba *phba)
499 struct hbq_dmabuf *dma_buf;
501 dma_buf = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
505 dma_buf->hbuf.virt = pci_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
506 &dma_buf->hbuf.phys);
507 if (!dma_buf->hbuf.virt) {
511 dma_buf->dbuf.virt = pci_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL,
512 &dma_buf->dbuf.phys);
513 if (!dma_buf->dbuf.virt) {
514 pci_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
519 dma_buf->size = LPFC_BPL_SIZE;
524 * lpfc_sli4_rb_free - Frees a receive buffer
525 * @phba: HBA buffer was allocated for
526 * @dmab: DMA Buffer container returned by lpfc_sli4_hbq_alloc
528 * Description: Frees both the container and the DMA-mapped buffers returned by
529 * lpfc_sli4_rb_alloc.
531 * Notes: Can be called with or without locks held.
536 lpfc_sli4_rb_free(struct lpfc_hba *phba, struct hbq_dmabuf *dmab)
538 pci_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
539 pci_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys);
545 * lpfc_in_buf_free - Free a DMA buffer
546 * @phba: HBA buffer is associated with
547 * @mp: Buffer to free
549 * Description: Frees the given DMA buffer in the appropriate way given if the
550 * HBA is running in SLI3 mode with HBQs enabled.
552 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
557 lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
559 struct hbq_dmabuf *hbq_entry;
565 if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
566 /* Check whether HBQ is still in use */
567 spin_lock_irqsave(&phba->hbalock, flags);
568 if (!phba->hbq_in_use) {
569 spin_unlock_irqrestore(&phba->hbalock, flags);
572 hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf);
573 list_del(&hbq_entry->dbuf.list);
574 if (hbq_entry->tag == -1) {
575 (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
578 lpfc_sli_free_hbq(phba, hbq_entry);
580 spin_unlock_irqrestore(&phba->hbalock, flags);
582 lpfc_mbuf_free(phba, mp->virt, mp->phys);