1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2017-2018 Broadcom. All Rights Reserved. The term *
5 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. *
6 * Copyright (C) 2004-2014 Emulex. All rights reserved. *
7 * EMULEX and SLI are trademarks of Emulex. *
8 * www.broadcom.com *
9 * Portions Copyright (C) 2004-2005 Christoph Hellwig *
10 * *
11 * This program is free software; you can redistribute it and/or *
12 * modify it under the terms of version 2 of the GNU General *
13 * Public License as published by the Free Software Foundation. *
14 * This program is distributed in the hope that it will be useful. *
15 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
16 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
17 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
18 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
19 * TO BE LEGALLY INVALID. See the GNU General Public License for *
20 * more details, a copy of which can be found in the file COPYING *
21 * included with this package. *
22 *******************************************************************/
23
24 #include <linux/mempool.h>
25 #include <linux/slab.h>
26 #include <linux/pci.h>
27 #include <linux/interrupt.h>
28
29 #include <scsi/scsi.h>
30 #include <scsi/scsi_device.h>
31 #include <scsi/scsi_transport_fc.h>
32 #include <scsi/fc/fc_fs.h>
33
34 #include "lpfc_hw4.h"
35 #include "lpfc_hw.h"
36 #include "lpfc_sli.h"
37 #include "lpfc_sli4.h"
38 #include "lpfc_nl.h"
39 #include "lpfc_disc.h"
40 #include "lpfc.h"
41 #include "lpfc_scsi.h"
42 #include "lpfc_crtn.h"
43 #include "lpfc_logmsg.h"
44
45 #define LPFC_MBUF_POOL_SIZE 64 /* max elements in MBUF safety pool */
46 #define LPFC_MEM_POOL_SIZE 64 /* max elem in non-DMA safety pool */
47 #define LPFC_DEVICE_DATA_POOL_SIZE 64 /* max elements in device data pool */
48 #define LPFC_RRQ_POOL_SIZE 256 /* max elements in non-DMA pool */
49
50 int
lpfc_mem_alloc_active_rrq_pool_s4(struct lpfc_hba * phba)51 lpfc_mem_alloc_active_rrq_pool_s4(struct lpfc_hba *phba) {
52 size_t bytes;
53 int max_xri = phba->sli4_hba.max_cfg_param.max_xri;
54
55 if (max_xri <= 0)
56 return -ENOMEM;
57 bytes = ((BITS_PER_LONG - 1 + max_xri) / BITS_PER_LONG) *
58 sizeof(unsigned long);
59 phba->cfg_rrq_xri_bitmap_sz = bytes;
60 phba->active_rrq_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
61 bytes);
62 if (!phba->active_rrq_pool)
63 return -ENOMEM;
64 else
65 return 0;
66 }
67
68 /**
69 * lpfc_mem_alloc - create and allocate all PCI and memory pools
70 * @phba: HBA to allocate pools for
71 * @align: alignment requirement for blocks; must be a power of two
72 *
73 * Description: Creates and allocates PCI pools lpfc_mbuf_pool,
74 * lpfc_hrb_pool. Creates and allocates kmalloc-backed mempools
75 * for LPFC_MBOXQ_t and lpfc_nodelist. Also allocates the VPI bitmask.
76 *
77 * Notes: Not interrupt-safe. Must be called with no locks held. If any
78 * allocation fails, frees all successfully allocated memory before returning.
79 *
80 * Returns:
81 * 0 on success
82 * -ENOMEM on failure (if any memory allocations fail)
83 **/
84 int
lpfc_mem_alloc(struct lpfc_hba * phba,int align)85 lpfc_mem_alloc(struct lpfc_hba *phba, int align)
86 {
87 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
88 int i;
89
90
91 phba->lpfc_mbuf_pool = dma_pool_create("lpfc_mbuf_pool", &phba->pcidev->dev,
92 LPFC_BPL_SIZE,
93 align, 0);
94 if (!phba->lpfc_mbuf_pool)
95 goto fail;
96
97 pool->elements = kmalloc_array(LPFC_MBUF_POOL_SIZE,
98 sizeof(struct lpfc_dmabuf),
99 GFP_KERNEL);
100 if (!pool->elements)
101 goto fail_free_lpfc_mbuf_pool;
102
103 pool->max_count = 0;
104 pool->current_count = 0;
105 for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
106 pool->elements[i].virt = dma_pool_alloc(phba->lpfc_mbuf_pool,
107 GFP_KERNEL, &pool->elements[i].phys);
108 if (!pool->elements[i].virt)
109 goto fail_free_mbuf_pool;
110 pool->max_count++;
111 pool->current_count++;
112 }
113
114 phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
115 sizeof(LPFC_MBOXQ_t));
116 if (!phba->mbox_mem_pool)
117 goto fail_free_mbuf_pool;
118
119 phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
120 sizeof(struct lpfc_nodelist));
121 if (!phba->nlp_mem_pool)
122 goto fail_free_mbox_pool;
123
124 if (phba->sli_rev == LPFC_SLI_REV4) {
125 phba->rrq_pool =
126 mempool_create_kmalloc_pool(LPFC_RRQ_POOL_SIZE,
127 sizeof(struct lpfc_node_rrq));
128 if (!phba->rrq_pool)
129 goto fail_free_nlp_mem_pool;
130 phba->lpfc_hrb_pool = dma_pool_create("lpfc_hrb_pool",
131 &phba->pcidev->dev,
132 LPFC_HDR_BUF_SIZE, align, 0);
133 if (!phba->lpfc_hrb_pool)
134 goto fail_free_rrq_mem_pool;
135
136 phba->lpfc_drb_pool = dma_pool_create("lpfc_drb_pool",
137 &phba->pcidev->dev,
138 LPFC_DATA_BUF_SIZE, align, 0);
139 if (!phba->lpfc_drb_pool)
140 goto fail_free_hrb_pool;
141 phba->lpfc_hbq_pool = NULL;
142 } else {
143 phba->lpfc_hbq_pool = dma_pool_create("lpfc_hbq_pool",
144 &phba->pcidev->dev, LPFC_BPL_SIZE, align, 0);
145 if (!phba->lpfc_hbq_pool)
146 goto fail_free_nlp_mem_pool;
147 phba->lpfc_hrb_pool = NULL;
148 phba->lpfc_drb_pool = NULL;
149 }
150
151 if (phba->cfg_EnableXLane) {
152 phba->device_data_mem_pool = mempool_create_kmalloc_pool(
153 LPFC_DEVICE_DATA_POOL_SIZE,
154 sizeof(struct lpfc_device_data));
155 if (!phba->device_data_mem_pool)
156 goto fail_free_drb_pool;
157 } else {
158 phba->device_data_mem_pool = NULL;
159 }
160
161 return 0;
162 fail_free_drb_pool:
163 dma_pool_destroy(phba->lpfc_drb_pool);
164 phba->lpfc_drb_pool = NULL;
165 fail_free_hrb_pool:
166 dma_pool_destroy(phba->lpfc_hrb_pool);
167 phba->lpfc_hrb_pool = NULL;
168 fail_free_rrq_mem_pool:
169 mempool_destroy(phba->rrq_pool);
170 phba->rrq_pool = NULL;
171 fail_free_nlp_mem_pool:
172 mempool_destroy(phba->nlp_mem_pool);
173 phba->nlp_mem_pool = NULL;
174 fail_free_mbox_pool:
175 mempool_destroy(phba->mbox_mem_pool);
176 phba->mbox_mem_pool = NULL;
177 fail_free_mbuf_pool:
178 while (i--)
179 dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
180 pool->elements[i].phys);
181 kfree(pool->elements);
182 fail_free_lpfc_mbuf_pool:
183 dma_pool_destroy(phba->lpfc_mbuf_pool);
184 phba->lpfc_mbuf_pool = NULL;
185 fail:
186 return -ENOMEM;
187 }
188
189 int
lpfc_nvmet_mem_alloc(struct lpfc_hba * phba)190 lpfc_nvmet_mem_alloc(struct lpfc_hba *phba)
191 {
192 phba->lpfc_nvmet_drb_pool =
193 dma_pool_create("lpfc_nvmet_drb_pool",
194 &phba->pcidev->dev, LPFC_NVMET_DATA_BUF_SIZE,
195 SGL_ALIGN_SZ, 0);
196 if (!phba->lpfc_nvmet_drb_pool) {
197 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
198 "6024 Can't enable NVME Target - no memory\n");
199 return -ENOMEM;
200 }
201 return 0;
202 }
203
204 /**
205 * lpfc_mem_free - Frees memory allocated by lpfc_mem_alloc
206 * @phba: HBA to free memory for
207 *
208 * Description: Free the memory allocated by lpfc_mem_alloc routine. This
209 * routine is a the counterpart of lpfc_mem_alloc.
210 *
211 * Returns: None
212 **/
213 void
lpfc_mem_free(struct lpfc_hba * phba)214 lpfc_mem_free(struct lpfc_hba *phba)
215 {
216 int i;
217 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
218 struct lpfc_device_data *device_data;
219
220 /* Free HBQ pools */
221 lpfc_sli_hbqbuf_free_all(phba);
222 dma_pool_destroy(phba->lpfc_nvmet_drb_pool);
223 phba->lpfc_nvmet_drb_pool = NULL;
224
225 dma_pool_destroy(phba->lpfc_drb_pool);
226 phba->lpfc_drb_pool = NULL;
227
228 dma_pool_destroy(phba->lpfc_hrb_pool);
229 phba->lpfc_hrb_pool = NULL;
230
231 dma_pool_destroy(phba->lpfc_hbq_pool);
232 phba->lpfc_hbq_pool = NULL;
233
234 mempool_destroy(phba->rrq_pool);
235 phba->rrq_pool = NULL;
236
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 && phba->active_rrq_pool) {
241 mempool_destroy(phba->active_rrq_pool);
242 phba->active_rrq_pool = NULL;
243 }
244
245 /* Free mbox memory pool */
246 mempool_destroy(phba->mbox_mem_pool);
247 phba->mbox_mem_pool = NULL;
248
249 /* Free MBUF memory pool */
250 for (i = 0; i < pool->current_count; i++)
251 dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
252 pool->elements[i].phys);
253 kfree(pool->elements);
254
255 dma_pool_destroy(phba->lpfc_mbuf_pool);
256 phba->lpfc_mbuf_pool = NULL;
257
258 /* Free Device Data memory pool */
259 if (phba->device_data_mem_pool) {
260 /* Ensure all objects have been returned to the pool */
261 while (!list_empty(&phba->luns)) {
262 device_data = list_first_entry(&phba->luns,
263 struct lpfc_device_data,
264 listentry);
265 list_del(&device_data->listentry);
266 mempool_free(device_data, phba->device_data_mem_pool);
267 }
268 mempool_destroy(phba->device_data_mem_pool);
269 }
270 phba->device_data_mem_pool = NULL;
271 return;
272 }
273
274 /**
275 * lpfc_mem_free_all - Frees all PCI and driver memory
276 * @phba: HBA to free memory for
277 *
278 * Description: Free memory from PCI and driver memory pools and also those
279 * used : lpfc_sg_dma_buf_pool, lpfc_mbuf_pool, lpfc_hrb_pool. Frees
280 * kmalloc-backed mempools for LPFC_MBOXQ_t and lpfc_nodelist. Also frees
281 * the VPI bitmask.
282 *
283 * Returns: None
284 **/
285 void
lpfc_mem_free_all(struct lpfc_hba * phba)286 lpfc_mem_free_all(struct lpfc_hba *phba)
287 {
288 struct lpfc_sli *psli = &phba->sli;
289 LPFC_MBOXQ_t *mbox, *next_mbox;
290 struct lpfc_dmabuf *mp;
291
292 /* Free memory used in mailbox queue back to mailbox memory pool */
293 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
294 mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
295 if (mp) {
296 lpfc_mbuf_free(phba, mp->virt, mp->phys);
297 kfree(mp);
298 }
299 list_del(&mbox->list);
300 mempool_free(mbox, phba->mbox_mem_pool);
301 }
302 /* Free memory used in mailbox cmpl list back to mailbox memory pool */
303 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq_cmpl, list) {
304 mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
305 if (mp) {
306 lpfc_mbuf_free(phba, mp->virt, mp->phys);
307 kfree(mp);
308 }
309 list_del(&mbox->list);
310 mempool_free(mbox, phba->mbox_mem_pool);
311 }
312 /* Free the active mailbox command back to the mailbox memory pool */
313 spin_lock_irq(&phba->hbalock);
314 psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
315 spin_unlock_irq(&phba->hbalock);
316 if (psli->mbox_active) {
317 mbox = psli->mbox_active;
318 mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
319 if (mp) {
320 lpfc_mbuf_free(phba, mp->virt, mp->phys);
321 kfree(mp);
322 }
323 mempool_free(mbox, phba->mbox_mem_pool);
324 psli->mbox_active = NULL;
325 }
326
327 /* Free and destroy all the allocated memory pools */
328 lpfc_mem_free(phba);
329
330 /* Free DMA buffer memory pool */
331 dma_pool_destroy(phba->lpfc_sg_dma_buf_pool);
332 phba->lpfc_sg_dma_buf_pool = NULL;
333
334 dma_pool_destroy(phba->lpfc_cmd_rsp_buf_pool);
335 phba->lpfc_cmd_rsp_buf_pool = NULL;
336
337 /* Free the iocb lookup array */
338 kfree(psli->iocbq_lookup);
339 psli->iocbq_lookup = NULL;
340
341 return;
342 }
343
344 /**
345 * lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool
346 * @phba: HBA which owns the pool to allocate from
347 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
348 * @handle: used to return the DMA-mapped address of the mbuf
349 *
350 * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool.
351 * Allocates from generic dma_pool_alloc function first and if that fails and
352 * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the
353 * HBA's pool.
354 *
355 * Notes: Not interrupt-safe. Must be called with no locks held. Takes
356 * phba->hbalock.
357 *
358 * Returns:
359 * pointer to the allocated mbuf on success
360 * NULL on failure
361 **/
362 void *
lpfc_mbuf_alloc(struct lpfc_hba * phba,int mem_flags,dma_addr_t * handle)363 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
364 {
365 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
366 unsigned long iflags;
367 void *ret;
368
369 ret = dma_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
370
371 spin_lock_irqsave(&phba->hbalock, iflags);
372 if (!ret && (mem_flags & MEM_PRI) && pool->current_count) {
373 pool->current_count--;
374 ret = pool->elements[pool->current_count].virt;
375 *handle = pool->elements[pool->current_count].phys;
376 }
377 spin_unlock_irqrestore(&phba->hbalock, iflags);
378 return ret;
379 }
380
381 /**
382 * __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked)
383 * @phba: HBA which owns the pool to return to
384 * @virt: mbuf to free
385 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
386 *
387 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
388 * it is below its max_count, frees the mbuf otherwise.
389 *
390 * Notes: Must be called with phba->hbalock held to synchronize access to
391 * lpfc_mbuf_safety_pool.
392 *
393 * Returns: None
394 **/
395 void
__lpfc_mbuf_free(struct lpfc_hba * phba,void * virt,dma_addr_t dma)396 __lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
397 {
398 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
399
400 if (pool->current_count < pool->max_count) {
401 pool->elements[pool->current_count].virt = virt;
402 pool->elements[pool->current_count].phys = dma;
403 pool->current_count++;
404 } else {
405 dma_pool_free(phba->lpfc_mbuf_pool, virt, dma);
406 }
407 return;
408 }
409
410 /**
411 * lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked)
412 * @phba: HBA which owns the pool to return to
413 * @virt: mbuf to free
414 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
415 *
416 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
417 * it is below its max_count, frees the mbuf otherwise.
418 *
419 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
420 *
421 * Returns: None
422 **/
423 void
lpfc_mbuf_free(struct lpfc_hba * phba,void * virt,dma_addr_t dma)424 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
425 {
426 unsigned long iflags;
427
428 spin_lock_irqsave(&phba->hbalock, iflags);
429 __lpfc_mbuf_free(phba, virt, dma);
430 spin_unlock_irqrestore(&phba->hbalock, iflags);
431 return;
432 }
433
434 /**
435 * lpfc_nvmet_buf_alloc - Allocate an nvmet_buf from the
436 * lpfc_sg_dma_buf_pool PCI pool
437 * @phba: HBA which owns the pool to allocate from
438 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
439 * @handle: used to return the DMA-mapped address of the nvmet_buf
440 *
441 * Description: Allocates a DMA-mapped buffer from the lpfc_sg_dma_buf_pool
442 * PCI pool. Allocates from generic dma_pool_alloc function.
443 *
444 * Returns:
445 * pointer to the allocated nvmet_buf on success
446 * NULL on failure
447 **/
448 void *
lpfc_nvmet_buf_alloc(struct lpfc_hba * phba,int mem_flags,dma_addr_t * handle)449 lpfc_nvmet_buf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
450 {
451 void *ret;
452
453 ret = dma_pool_alloc(phba->lpfc_sg_dma_buf_pool, GFP_KERNEL, handle);
454 return ret;
455 }
456
457 /**
458 * lpfc_nvmet_buf_free - Free an nvmet_buf from the lpfc_sg_dma_buf_pool
459 * PCI pool
460 * @phba: HBA which owns the pool to return to
461 * @virt: nvmet_buf to free
462 * @dma: the DMA-mapped address of the lpfc_sg_dma_buf_pool to be freed
463 *
464 * Returns: None
465 **/
466 void
lpfc_nvmet_buf_free(struct lpfc_hba * phba,void * virt,dma_addr_t dma)467 lpfc_nvmet_buf_free(struct lpfc_hba *phba, void *virt, dma_addr_t dma)
468 {
469 dma_pool_free(phba->lpfc_sg_dma_buf_pool, virt, dma);
470 }
471
472 /**
473 * lpfc_els_hbq_alloc - Allocate an HBQ buffer
474 * @phba: HBA to allocate HBQ buffer for
475 *
476 * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hrb_pool PCI
477 * pool along a non-DMA-mapped container for it.
478 *
479 * Notes: Not interrupt-safe. Must be called with no locks held.
480 *
481 * Returns:
482 * pointer to HBQ on success
483 * NULL on failure
484 **/
485 struct hbq_dmabuf *
lpfc_els_hbq_alloc(struct lpfc_hba * phba)486 lpfc_els_hbq_alloc(struct lpfc_hba *phba)
487 {
488 struct hbq_dmabuf *hbqbp;
489
490 hbqbp = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
491 if (!hbqbp)
492 return NULL;
493
494 hbqbp->dbuf.virt = dma_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL,
495 &hbqbp->dbuf.phys);
496 if (!hbqbp->dbuf.virt) {
497 kfree(hbqbp);
498 return NULL;
499 }
500 hbqbp->total_size = LPFC_BPL_SIZE;
501 return hbqbp;
502 }
503
504 /**
505 * lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc
506 * @phba: HBA buffer was allocated for
507 * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc
508 *
509 * Description: Frees both the container and the DMA-mapped buffer returned by
510 * lpfc_els_hbq_alloc.
511 *
512 * Notes: Can be called with or without locks held.
513 *
514 * Returns: None
515 **/
516 void
lpfc_els_hbq_free(struct lpfc_hba * phba,struct hbq_dmabuf * hbqbp)517 lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp)
518 {
519 dma_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys);
520 kfree(hbqbp);
521 return;
522 }
523
524 /**
525 * lpfc_sli4_rb_alloc - Allocate an SLI4 Receive buffer
526 * @phba: HBA to allocate a receive buffer for
527 *
528 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
529 * pool along a non-DMA-mapped container for it.
530 *
531 * Notes: Not interrupt-safe. Must be called with no locks held.
532 *
533 * Returns:
534 * pointer to HBQ on success
535 * NULL on failure
536 **/
537 struct hbq_dmabuf *
lpfc_sli4_rb_alloc(struct lpfc_hba * phba)538 lpfc_sli4_rb_alloc(struct lpfc_hba *phba)
539 {
540 struct hbq_dmabuf *dma_buf;
541
542 dma_buf = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
543 if (!dma_buf)
544 return NULL;
545
546 dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
547 &dma_buf->hbuf.phys);
548 if (!dma_buf->hbuf.virt) {
549 kfree(dma_buf);
550 return NULL;
551 }
552 dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL,
553 &dma_buf->dbuf.phys);
554 if (!dma_buf->dbuf.virt) {
555 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
556 dma_buf->hbuf.phys);
557 kfree(dma_buf);
558 return NULL;
559 }
560 dma_buf->total_size = LPFC_DATA_BUF_SIZE;
561 return dma_buf;
562 }
563
564 /**
565 * lpfc_sli4_rb_free - Frees a receive buffer
566 * @phba: HBA buffer was allocated for
567 * @dmab: DMA Buffer container returned by lpfc_sli4_hbq_alloc
568 *
569 * Description: Frees both the container and the DMA-mapped buffers returned by
570 * lpfc_sli4_rb_alloc.
571 *
572 * Notes: Can be called with or without locks held.
573 *
574 * Returns: None
575 **/
576 void
lpfc_sli4_rb_free(struct lpfc_hba * phba,struct hbq_dmabuf * dmab)577 lpfc_sli4_rb_free(struct lpfc_hba *phba, struct hbq_dmabuf *dmab)
578 {
579 dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
580 dma_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys);
581 kfree(dmab);
582 }
583
584 /**
585 * lpfc_sli4_nvmet_alloc - Allocate an SLI4 Receive buffer
586 * @phba: HBA to allocate a receive buffer for
587 *
588 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
589 * pool along a non-DMA-mapped container for it.
590 *
591 * Notes: Not interrupt-safe. Must be called with no locks held.
592 *
593 * Returns:
594 * pointer to HBQ on success
595 * NULL on failure
596 **/
597 struct rqb_dmabuf *
lpfc_sli4_nvmet_alloc(struct lpfc_hba * phba)598 lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
599 {
600 struct rqb_dmabuf *dma_buf;
601
602 dma_buf = kzalloc(sizeof(struct rqb_dmabuf), GFP_KERNEL);
603 if (!dma_buf)
604 return NULL;
605
606 dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
607 &dma_buf->hbuf.phys);
608 if (!dma_buf->hbuf.virt) {
609 kfree(dma_buf);
610 return NULL;
611 }
612 dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_nvmet_drb_pool,
613 GFP_KERNEL, &dma_buf->dbuf.phys);
614 if (!dma_buf->dbuf.virt) {
615 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
616 dma_buf->hbuf.phys);
617 kfree(dma_buf);
618 return NULL;
619 }
620 dma_buf->total_size = LPFC_NVMET_DATA_BUF_SIZE;
621 return dma_buf;
622 }
623
624 /**
625 * lpfc_sli4_nvmet_free - Frees a receive buffer
626 * @phba: HBA buffer was allocated for
627 * @dmab: DMA Buffer container returned by lpfc_sli4_rbq_alloc
628 *
629 * Description: Frees both the container and the DMA-mapped buffers returned by
630 * lpfc_sli4_nvmet_alloc.
631 *
632 * Notes: Can be called with or without locks held.
633 *
634 * Returns: None
635 **/
636 void
lpfc_sli4_nvmet_free(struct lpfc_hba * phba,struct rqb_dmabuf * dmab)637 lpfc_sli4_nvmet_free(struct lpfc_hba *phba, struct rqb_dmabuf *dmab)
638 {
639 dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
640 dma_pool_free(phba->lpfc_nvmet_drb_pool,
641 dmab->dbuf.virt, dmab->dbuf.phys);
642 kfree(dmab);
643 }
644
645 /**
646 * lpfc_in_buf_free - Free a DMA buffer
647 * @phba: HBA buffer is associated with
648 * @mp: Buffer to free
649 *
650 * Description: Frees the given DMA buffer in the appropriate way given if the
651 * HBA is running in SLI3 mode with HBQs enabled.
652 *
653 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
654 *
655 * Returns: None
656 **/
657 void
lpfc_in_buf_free(struct lpfc_hba * phba,struct lpfc_dmabuf * mp)658 lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
659 {
660 struct hbq_dmabuf *hbq_entry;
661 unsigned long flags;
662
663 if (!mp)
664 return;
665
666 if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
667 hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf);
668 /* Check whether HBQ is still in use */
669 spin_lock_irqsave(&phba->hbalock, flags);
670 if (!phba->hbq_in_use) {
671 spin_unlock_irqrestore(&phba->hbalock, flags);
672 return;
673 }
674 list_del(&hbq_entry->dbuf.list);
675 if (hbq_entry->tag == -1) {
676 (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
677 (phba, hbq_entry);
678 } else {
679 lpfc_sli_free_hbq(phba, hbq_entry);
680 }
681 spin_unlock_irqrestore(&phba->hbalock, flags);
682 } else {
683 lpfc_mbuf_free(phba, mp->virt, mp->phys);
684 kfree(mp);
685 }
686 return;
687 }
688
689 /**
690 * lpfc_rq_buf_free - Free a RQ DMA buffer
691 * @phba: HBA buffer is associated with
692 * @mp: Buffer to free
693 *
694 * Description: Frees the given DMA buffer in the appropriate way given by
695 * reposting it to its associated RQ so it can be reused.
696 *
697 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
698 *
699 * Returns: None
700 **/
701 void
lpfc_rq_buf_free(struct lpfc_hba * phba,struct lpfc_dmabuf * mp)702 lpfc_rq_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
703 {
704 struct lpfc_rqb *rqbp;
705 struct lpfc_rqe hrqe;
706 struct lpfc_rqe drqe;
707 struct rqb_dmabuf *rqb_entry;
708 unsigned long flags;
709 int rc;
710
711 if (!mp)
712 return;
713
714 rqb_entry = container_of(mp, struct rqb_dmabuf, hbuf);
715 rqbp = rqb_entry->hrq->rqbp;
716
717 spin_lock_irqsave(&phba->hbalock, flags);
718 list_del(&rqb_entry->hbuf.list);
719 hrqe.address_lo = putPaddrLow(rqb_entry->hbuf.phys);
720 hrqe.address_hi = putPaddrHigh(rqb_entry->hbuf.phys);
721 drqe.address_lo = putPaddrLow(rqb_entry->dbuf.phys);
722 drqe.address_hi = putPaddrHigh(rqb_entry->dbuf.phys);
723 rc = lpfc_sli4_rq_put(rqb_entry->hrq, rqb_entry->drq, &hrqe, &drqe);
724 if (rc < 0) {
725 (rqbp->rqb_free_buffer)(phba, rqb_entry);
726 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
727 "6409 Cannot post to HRQ %d: %x %x %x "
728 "DRQ %x %x\n",
729 rqb_entry->hrq->queue_id,
730 rqb_entry->hrq->host_index,
731 rqb_entry->hrq->hba_index,
732 rqb_entry->hrq->entry_count,
733 rqb_entry->drq->host_index,
734 rqb_entry->drq->hba_index);
735 } else {
736 list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list);
737 rqbp->buffer_count++;
738 }
739
740 spin_unlock_irqrestore(&phba->hbalock, flags);
741 }
742
