1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2017-2021 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 #define LPFC_MBX_POOL_SIZE 256 /* max elements in MBX non-DMA pool */
50
51 int
lpfc_mem_alloc_active_rrq_pool_s4(struct lpfc_hba * phba)52 lpfc_mem_alloc_active_rrq_pool_s4(struct lpfc_hba *phba) {
53 size_t bytes;
54 int max_xri = phba->sli4_hba.max_cfg_param.max_xri;
55
56 if (max_xri <= 0)
57 return -ENOMEM;
58 bytes = ((BITS_PER_LONG - 1 + max_xri) / BITS_PER_LONG) *
59 sizeof(unsigned long);
60 phba->cfg_rrq_xri_bitmap_sz = bytes;
61 phba->active_rrq_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
62 bytes);
63 if (!phba->active_rrq_pool)
64 return -ENOMEM;
65 else
66 return 0;
67 }
68
69 /**
70 * lpfc_mem_alloc - create and allocate all PCI and memory pools
71 * @phba: HBA to allocate pools for
72 * @align: alignment requirement for blocks; must be a power of two
73 *
74 * Description: Creates and allocates PCI pools lpfc_mbuf_pool,
75 * lpfc_hrb_pool. Creates and allocates kmalloc-backed mempools
76 * for LPFC_MBOXQ_t and lpfc_nodelist. Also allocates the VPI bitmask.
77 *
78 * Notes: Not interrupt-safe. Must be called with no locks held. If any
79 * allocation fails, frees all successfully allocated memory before returning.
80 *
81 * Returns:
82 * 0 on success
83 * -ENOMEM on failure (if any memory allocations fail)
84 **/
85 int
lpfc_mem_alloc(struct lpfc_hba * phba,int align)86 lpfc_mem_alloc(struct lpfc_hba *phba, int align)
87 {
88 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
89 int i;
90
91
92 phba->lpfc_mbuf_pool = dma_pool_create("lpfc_mbuf_pool", &phba->pcidev->dev,
93 LPFC_BPL_SIZE,
94 align, 0);
95 if (!phba->lpfc_mbuf_pool)
96 goto fail;
97
98 pool->elements = kmalloc_array(LPFC_MBUF_POOL_SIZE,
99 sizeof(struct lpfc_dmabuf),
100 GFP_KERNEL);
101 if (!pool->elements)
102 goto fail_free_lpfc_mbuf_pool;
103
104 pool->max_count = 0;
105 pool->current_count = 0;
106 for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
107 pool->elements[i].virt = dma_pool_alloc(phba->lpfc_mbuf_pool,
108 GFP_KERNEL, &pool->elements[i].phys);
109 if (!pool->elements[i].virt)
110 goto fail_free_mbuf_pool;
111 pool->max_count++;
112 pool->current_count++;
113 }
114
115 phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MBX_POOL_SIZE,
116 sizeof(LPFC_MBOXQ_t));
117 if (!phba->mbox_mem_pool)
118 goto fail_free_mbuf_pool;
119
120 phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
121 sizeof(struct lpfc_nodelist));
122 if (!phba->nlp_mem_pool)
123 goto fail_free_mbox_pool;
124
125 if (phba->sli_rev == LPFC_SLI_REV4) {
126 phba->rrq_pool =
127 mempool_create_kmalloc_pool(LPFC_RRQ_POOL_SIZE,
128 sizeof(struct lpfc_node_rrq));
129 if (!phba->rrq_pool)
130 goto fail_free_nlp_mem_pool;
131 phba->lpfc_hrb_pool = dma_pool_create("lpfc_hrb_pool",
132 &phba->pcidev->dev,
133 LPFC_HDR_BUF_SIZE, align, 0);
134 if (!phba->lpfc_hrb_pool)
135 goto fail_free_rrq_mem_pool;
136
137 phba->lpfc_drb_pool = dma_pool_create("lpfc_drb_pool",
138 &phba->pcidev->dev,
139 LPFC_DATA_BUF_SIZE, align, 0);
140 if (!phba->lpfc_drb_pool)
141 goto fail_free_hrb_pool;
142 phba->lpfc_hbq_pool = NULL;
143 } else {
144 phba->lpfc_hbq_pool = dma_pool_create("lpfc_hbq_pool",
145 &phba->pcidev->dev, LPFC_BPL_SIZE, align, 0);
146 if (!phba->lpfc_hbq_pool)
147 goto fail_free_nlp_mem_pool;
148 phba->lpfc_hrb_pool = NULL;
149 phba->lpfc_drb_pool = NULL;
150 }
151
152 if (phba->cfg_EnableXLane) {
153 phba->device_data_mem_pool = mempool_create_kmalloc_pool(
154 LPFC_DEVICE_DATA_POOL_SIZE,
155 sizeof(struct lpfc_device_data));
156 if (!phba->device_data_mem_pool)
157 goto fail_free_drb_pool;
158 } else {
159 phba->device_data_mem_pool = NULL;
160 }
161
162 return 0;
163 fail_free_drb_pool:
164 dma_pool_destroy(phba->lpfc_drb_pool);
165 phba->lpfc_drb_pool = NULL;
166 fail_free_hrb_pool:
167 dma_pool_destroy(phba->lpfc_hrb_pool);
168 phba->lpfc_hrb_pool = NULL;
169 fail_free_rrq_mem_pool:
170 mempool_destroy(phba->rrq_pool);
171 phba->rrq_pool = NULL;
172 fail_free_nlp_mem_pool:
173 mempool_destroy(phba->nlp_mem_pool);
174 phba->nlp_mem_pool = NULL;
175 fail_free_mbox_pool:
176 mempool_destroy(phba->mbox_mem_pool);
177 phba->mbox_mem_pool = NULL;
178 fail_free_mbuf_pool:
179 while (i--)
180 dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
181 pool->elements[i].phys);
182 kfree(pool->elements);
183 fail_free_lpfc_mbuf_pool:
184 dma_pool_destroy(phba->lpfc_mbuf_pool);
185 phba->lpfc_mbuf_pool = NULL;
186 fail:
187 return -ENOMEM;
188 }
189
190 int
lpfc_nvmet_mem_alloc(struct lpfc_hba * phba)191 lpfc_nvmet_mem_alloc(struct lpfc_hba *phba)
192 {
193 phba->lpfc_nvmet_drb_pool =
194 dma_pool_create("lpfc_nvmet_drb_pool",
195 &phba->pcidev->dev, LPFC_NVMET_DATA_BUF_SIZE,
196 SGL_ALIGN_SZ, 0);
197 if (!phba->lpfc_nvmet_drb_pool) {
198 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
199 "6024 Can't enable NVME Target - no memory\n");
200 return -ENOMEM;
201 }
202 return 0;
203 }
204
205 /**
206 * lpfc_mem_free - Frees memory allocated by lpfc_mem_alloc
207 * @phba: HBA to free memory for
208 *
209 * Description: Free the memory allocated by lpfc_mem_alloc routine. This
210 * routine is a the counterpart of lpfc_mem_alloc.
211 *
212 * Returns: None
213 **/
214 void
lpfc_mem_free(struct lpfc_hba * phba)215 lpfc_mem_free(struct lpfc_hba *phba)
216 {
217 int i;
218 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
219 struct lpfc_device_data *device_data;
220
221 /* Free HBQ pools */
222 lpfc_sli_hbqbuf_free_all(phba);
223 dma_pool_destroy(phba->lpfc_nvmet_drb_pool);
224 phba->lpfc_nvmet_drb_pool = NULL;
225
226 dma_pool_destroy(phba->lpfc_drb_pool);
227 phba->lpfc_drb_pool = NULL;
228
229 dma_pool_destroy(phba->lpfc_hrb_pool);
230 phba->lpfc_hrb_pool = NULL;
231
232 dma_pool_destroy(phba->lpfc_hbq_pool);
233 phba->lpfc_hbq_pool = NULL;
234
235 mempool_destroy(phba->rrq_pool);
236 phba->rrq_pool = NULL;
237
238 /* Free NLP memory pool */
239 mempool_destroy(phba->nlp_mem_pool);
240 phba->nlp_mem_pool = NULL;
241 if (phba->sli_rev == LPFC_SLI_REV4 && phba->active_rrq_pool) {
242 mempool_destroy(phba->active_rrq_pool);
243 phba->active_rrq_pool = NULL;
244 }
245
246 /* Free mbox memory pool */
247 mempool_destroy(phba->mbox_mem_pool);
248 phba->mbox_mem_pool = NULL;
249
250 /* Free MBUF memory pool */
251 for (i = 0; i < pool->current_count; i++)
252 dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
253 pool->elements[i].phys);
254 kfree(pool->elements);
255
256 dma_pool_destroy(phba->lpfc_mbuf_pool);
257 phba->lpfc_mbuf_pool = NULL;
258
259 /* Free Device Data memory pool */
260 if (phba->device_data_mem_pool) {
261 /* Ensure all objects have been returned to the pool */
262 while (!list_empty(&phba->luns)) {
263 device_data = list_first_entry(&phba->luns,
264 struct lpfc_device_data,
265 listentry);
266 list_del(&device_data->listentry);
267 mempool_free(device_data, phba->device_data_mem_pool);
268 }
269 mempool_destroy(phba->device_data_mem_pool);
270 }
271 phba->device_data_mem_pool = NULL;
272 return;
273 }
274
275 /**
276 * lpfc_mem_free_all - Frees all PCI and driver memory
277 * @phba: HBA to free memory for
278 *
279 * Description: Free memory from PCI and driver memory pools and also those
280 * used : lpfc_sg_dma_buf_pool, lpfc_mbuf_pool, lpfc_hrb_pool. Frees
281 * kmalloc-backed mempools for LPFC_MBOXQ_t and lpfc_nodelist. Also frees
282 * the VPI bitmask.
283 *
284 * Returns: None
285 **/
286 void
lpfc_mem_free_all(struct lpfc_hba * phba)287 lpfc_mem_free_all(struct lpfc_hba *phba)
288 {
289 struct lpfc_sli *psli = &phba->sli;
290 LPFC_MBOXQ_t *mbox, *next_mbox;
291 struct lpfc_dmabuf *mp;
292
293 /* Free memory used in mailbox queue back to mailbox memory pool */
294 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
295 mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
296 if (mp) {
297 lpfc_mbuf_free(phba, mp->virt, mp->phys);
298 kfree(mp);
299 }
300 list_del(&mbox->list);
301 mempool_free(mbox, phba->mbox_mem_pool);
302 }
303 /* Free memory used in mailbox cmpl list back to mailbox memory pool */
304 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq_cmpl, list) {
305 mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
306 if (mp) {
307 lpfc_mbuf_free(phba, mp->virt, mp->phys);
308 kfree(mp);
309 }
310 list_del(&mbox->list);
311 mempool_free(mbox, phba->mbox_mem_pool);
312 }
313 /* Free the active mailbox command back to the mailbox memory pool */
314 spin_lock_irq(&phba->hbalock);
315 psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
316 spin_unlock_irq(&phba->hbalock);
317 if (psli->mbox_active) {
318 mbox = psli->mbox_active;
319 mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
320 if (mp) {
321 lpfc_mbuf_free(phba, mp->virt, mp->phys);
322 kfree(mp);
323 }
324 mempool_free(mbox, phba->mbox_mem_pool);
325 psli->mbox_active = NULL;
326 }
327
328 /* Free and destroy all the allocated memory pools */
329 lpfc_mem_free(phba);
330
331 /* Free DMA buffer memory pool */
332 dma_pool_destroy(phba->lpfc_sg_dma_buf_pool);
333 phba->lpfc_sg_dma_buf_pool = NULL;
334
335 dma_pool_destroy(phba->lpfc_cmd_rsp_buf_pool);
336 phba->lpfc_cmd_rsp_buf_pool = NULL;
337
338 /* Free Congestion Data buffer */
339 if (phba->cgn_i) {
340 dma_free_coherent(&phba->pcidev->dev,
341 sizeof(struct lpfc_cgn_info),
342 phba->cgn_i->virt, phba->cgn_i->phys);
343 kfree(phba->cgn_i);
344 phba->cgn_i = NULL;
345 }
346
347 /* Free RX table */
348 kfree(phba->rxtable);
349 phba->rxtable = NULL;
350
351 /* Free the iocb lookup array */
352 kfree(psli->iocbq_lookup);
353 psli->iocbq_lookup = NULL;
354
355 return;
356 }
357
358 /**
359 * lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool
360 * @phba: HBA which owns the pool to allocate from
361 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
362 * @handle: used to return the DMA-mapped address of the mbuf
363 *
364 * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool.
365 * Allocates from generic dma_pool_alloc function first and if that fails and
366 * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the
367 * HBA's pool.
368 *
369 * Notes: Not interrupt-safe. Must be called with no locks held. Takes
370 * phba->hbalock.
371 *
372 * Returns:
373 * pointer to the allocated mbuf on success
374 * NULL on failure
375 **/
376 void *
lpfc_mbuf_alloc(struct lpfc_hba * phba,int mem_flags,dma_addr_t * handle)377 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
378 {
379 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
380 unsigned long iflags;
381 void *ret;
382
383 ret = dma_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
384
385 spin_lock_irqsave(&phba->hbalock, iflags);
386 if (!ret && (mem_flags & MEM_PRI) && pool->current_count) {
387 pool->current_count--;
388 ret = pool->elements[pool->current_count].virt;
389 *handle = pool->elements[pool->current_count].phys;
390 }
391 spin_unlock_irqrestore(&phba->hbalock, iflags);
392 return ret;
393 }
394
395 /**
396 * __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked)
397 * @phba: HBA which owns the pool to return to
398 * @virt: mbuf to free
399 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
400 *
401 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
402 * it is below its max_count, frees the mbuf otherwise.
403 *
404 * Notes: Must be called with phba->hbalock held to synchronize access to
405 * lpfc_mbuf_safety_pool.
406 *
407 * Returns: None
408 **/
409 void
__lpfc_mbuf_free(struct lpfc_hba * phba,void * virt,dma_addr_t dma)410 __lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
411 {
412 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
413
414 if (pool->current_count < pool->max_count) {
415 pool->elements[pool->current_count].virt = virt;
416 pool->elements[pool->current_count].phys = dma;
417 pool->current_count++;
418 } else {
419 dma_pool_free(phba->lpfc_mbuf_pool, virt, dma);
420 }
421 return;
422 }
423
424 /**
425 * lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked)
426 * @phba: HBA which owns the pool to return to
427 * @virt: mbuf to free
428 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
429 *
430 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
431 * it is below its max_count, frees the mbuf otherwise.
432 *
433 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
434 *
435 * Returns: None
436 **/
437 void
lpfc_mbuf_free(struct lpfc_hba * phba,void * virt,dma_addr_t dma)438 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
439 {
440 unsigned long iflags;
441
442 spin_lock_irqsave(&phba->hbalock, iflags);
443 __lpfc_mbuf_free(phba, virt, dma);
444 spin_unlock_irqrestore(&phba->hbalock, iflags);
445 return;
446 }
447
448 /**
449 * lpfc_nvmet_buf_alloc - Allocate an nvmet_buf from the
450 * lpfc_sg_dma_buf_pool PCI pool
451 * @phba: HBA which owns the pool to allocate from
452 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
453 * @handle: used to return the DMA-mapped address of the nvmet_buf
454 *
455 * Description: Allocates a DMA-mapped buffer from the lpfc_sg_dma_buf_pool
456 * PCI pool. Allocates from generic dma_pool_alloc function.
457 *
458 * Returns:
459 * pointer to the allocated nvmet_buf on success
460 * NULL on failure
461 **/
462 void *
lpfc_nvmet_buf_alloc(struct lpfc_hba * phba,int mem_flags,dma_addr_t * handle)463 lpfc_nvmet_buf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
464 {
465 void *ret;
466
467 ret = dma_pool_alloc(phba->lpfc_sg_dma_buf_pool, GFP_KERNEL, handle);
468 return ret;
469 }
470
471 /**
472 * lpfc_nvmet_buf_free - Free an nvmet_buf from the lpfc_sg_dma_buf_pool
473 * PCI pool
474 * @phba: HBA which owns the pool to return to
475 * @virt: nvmet_buf to free
476 * @dma: the DMA-mapped address of the lpfc_sg_dma_buf_pool to be freed
477 *
478 * Returns: None
479 **/
480 void
lpfc_nvmet_buf_free(struct lpfc_hba * phba,void * virt,dma_addr_t dma)481 lpfc_nvmet_buf_free(struct lpfc_hba *phba, void *virt, dma_addr_t dma)
482 {
483 dma_pool_free(phba->lpfc_sg_dma_buf_pool, virt, dma);
484 }
485
486 /**
487 * lpfc_els_hbq_alloc - Allocate an HBQ buffer
488 * @phba: HBA to allocate HBQ buffer for
489 *
490 * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hrb_pool PCI
491 * pool along a non-DMA-mapped container for it.
492 *
493 * Notes: Not interrupt-safe. Must be called with no locks held.
494 *
495 * Returns:
496 * pointer to HBQ on success
497 * NULL on failure
498 **/
499 struct hbq_dmabuf *
lpfc_els_hbq_alloc(struct lpfc_hba * phba)500 lpfc_els_hbq_alloc(struct lpfc_hba *phba)
501 {
502 struct hbq_dmabuf *hbqbp;
503
504 hbqbp = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
505 if (!hbqbp)
506 return NULL;
507
508 hbqbp->dbuf.virt = dma_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL,
509 &hbqbp->dbuf.phys);
510 if (!hbqbp->dbuf.virt) {
511 kfree(hbqbp);
512 return NULL;
513 }
514 hbqbp->total_size = LPFC_BPL_SIZE;
515 return hbqbp;
516 }
517
518 /**
519 * lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc
520 * @phba: HBA buffer was allocated for
521 * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc
522 *
523 * Description: Frees both the container and the DMA-mapped buffer returned by
524 * lpfc_els_hbq_alloc.
525 *
526 * Notes: Can be called with or without locks held.
527 *
528 * Returns: None
529 **/
530 void
lpfc_els_hbq_free(struct lpfc_hba * phba,struct hbq_dmabuf * hbqbp)531 lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp)
532 {
533 dma_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys);
534 kfree(hbqbp);
535 return;
536 }
537
538 /**
539 * lpfc_sli4_rb_alloc - Allocate an SLI4 Receive buffer
540 * @phba: HBA to allocate a receive buffer for
541 *
542 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
543 * pool along a non-DMA-mapped container for it.
544 *
545 * Notes: Not interrupt-safe. Must be called with no locks held.
546 *
547 * Returns:
548 * pointer to HBQ on success
549 * NULL on failure
550 **/
551 struct hbq_dmabuf *
lpfc_sli4_rb_alloc(struct lpfc_hba * phba)552 lpfc_sli4_rb_alloc(struct lpfc_hba *phba)
553 {
554 struct hbq_dmabuf *dma_buf;
555
556 dma_buf = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
557 if (!dma_buf)
558 return NULL;
559
560 dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
561 &dma_buf->hbuf.phys);
562 if (!dma_buf->hbuf.virt) {
563 kfree(dma_buf);
564 return NULL;
565 }
566 dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL,
567 &dma_buf->dbuf.phys);
568 if (!dma_buf->dbuf.virt) {
569 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
570 dma_buf->hbuf.phys);
571 kfree(dma_buf);
572 return NULL;
573 }
574 dma_buf->total_size = LPFC_DATA_BUF_SIZE;
575 return dma_buf;
576 }
577
578 /**
579 * lpfc_sli4_rb_free - Frees a receive buffer
580 * @phba: HBA buffer was allocated for
581 * @dmab: DMA Buffer container returned by lpfc_sli4_hbq_alloc
582 *
583 * Description: Frees both the container and the DMA-mapped buffers returned by
584 * lpfc_sli4_rb_alloc.
585 *
586 * Notes: Can be called with or without locks held.
587 *
588 * Returns: None
589 **/
590 void
lpfc_sli4_rb_free(struct lpfc_hba * phba,struct hbq_dmabuf * dmab)591 lpfc_sli4_rb_free(struct lpfc_hba *phba, struct hbq_dmabuf *dmab)
592 {
593 dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
594 dma_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys);
595 kfree(dmab);
596 }
597
598 /**
599 * lpfc_sli4_nvmet_alloc - Allocate an SLI4 Receive buffer
600 * @phba: HBA to allocate a receive buffer for
601 *
602 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
603 * pool along a non-DMA-mapped container for it.
604 *
605 * Returns:
606 * pointer to HBQ on success
607 * NULL on failure
608 **/
609 struct rqb_dmabuf *
lpfc_sli4_nvmet_alloc(struct lpfc_hba * phba)610 lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
611 {
612 struct rqb_dmabuf *dma_buf;
613
614 dma_buf = kzalloc(sizeof(*dma_buf), GFP_KERNEL);
615 if (!dma_buf)
616 return NULL;
617
618 dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
619 &dma_buf->hbuf.phys);
620 if (!dma_buf->hbuf.virt) {
621 kfree(dma_buf);
622 return NULL;
623 }
624 dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_nvmet_drb_pool,
625 GFP_KERNEL, &dma_buf->dbuf.phys);
626 if (!dma_buf->dbuf.virt) {
627 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
628 dma_buf->hbuf.phys);
629 kfree(dma_buf);
630 return NULL;
631 }
632 dma_buf->total_size = LPFC_NVMET_DATA_BUF_SIZE;
633 return dma_buf;
634 }
635
636 /**
637 * lpfc_sli4_nvmet_free - Frees a receive buffer
638 * @phba: HBA buffer was allocated for
639 * @dmab: DMA Buffer container returned by lpfc_sli4_rbq_alloc
640 *
641 * Description: Frees both the container and the DMA-mapped buffers returned by
642 * lpfc_sli4_nvmet_alloc.
643 *
644 * Notes: Can be called with or without locks held.
645 *
646 * Returns: None
647 **/
648 void
lpfc_sli4_nvmet_free(struct lpfc_hba * phba,struct rqb_dmabuf * dmab)649 lpfc_sli4_nvmet_free(struct lpfc_hba *phba, struct rqb_dmabuf *dmab)
650 {
651 dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
652 dma_pool_free(phba->lpfc_nvmet_drb_pool,
653 dmab->dbuf.virt, dmab->dbuf.phys);
654 kfree(dmab);
655 }
656
657 /**
658 * lpfc_in_buf_free - Free a DMA buffer
659 * @phba: HBA buffer is associated with
660 * @mp: Buffer to free
661 *
662 * Description: Frees the given DMA buffer in the appropriate way given if the
663 * HBA is running in SLI3 mode with HBQs enabled.
664 *
665 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
666 *
667 * Returns: None
668 **/
669 void
lpfc_in_buf_free(struct lpfc_hba * phba,struct lpfc_dmabuf * mp)670 lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
671 {
672 struct hbq_dmabuf *hbq_entry;
673 unsigned long flags;
674
675 if (!mp)
676 return;
677
678 if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
679 hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf);
680 /* Check whether HBQ is still in use */
681 spin_lock_irqsave(&phba->hbalock, flags);
682 if (!phba->hbq_in_use) {
683 spin_unlock_irqrestore(&phba->hbalock, flags);
684 return;
685 }
686 list_del(&hbq_entry->dbuf.list);
687 if (hbq_entry->tag == -1) {
688 (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
689 (phba, hbq_entry);
690 } else {
691 lpfc_sli_free_hbq(phba, hbq_entry);
692 }
693 spin_unlock_irqrestore(&phba->hbalock, flags);
694 } else {
695 lpfc_mbuf_free(phba, mp->virt, mp->phys);
696 kfree(mp);
697 }
698 return;
699 }
700
701 /**
702 * lpfc_rq_buf_free - Free a RQ DMA buffer
703 * @phba: HBA buffer is associated with
704 * @mp: Buffer to free
705 *
706 * Description: Frees the given DMA buffer in the appropriate way given by
707 * reposting it to its associated RQ so it can be reused.
708 *
709 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
710 *
711 * Returns: None
712 **/
713 void
lpfc_rq_buf_free(struct lpfc_hba * phba,struct lpfc_dmabuf * mp)714 lpfc_rq_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
715 {
716 struct lpfc_rqb *rqbp;
717 struct lpfc_rqe hrqe;
718 struct lpfc_rqe drqe;
719 struct rqb_dmabuf *rqb_entry;
720 unsigned long flags;
721 int rc;
722
723 if (!mp)
724 return;
725
726 rqb_entry = container_of(mp, struct rqb_dmabuf, hbuf);
727 rqbp = rqb_entry->hrq->rqbp;
728
729 spin_lock_irqsave(&phba->hbalock, flags);
730 list_del(&rqb_entry->hbuf.list);
731 hrqe.address_lo = putPaddrLow(rqb_entry->hbuf.phys);
732 hrqe.address_hi = putPaddrHigh(rqb_entry->hbuf.phys);
733 drqe.address_lo = putPaddrLow(rqb_entry->dbuf.phys);
734 drqe.address_hi = putPaddrHigh(rqb_entry->dbuf.phys);
735 rc = lpfc_sli4_rq_put(rqb_entry->hrq, rqb_entry->drq, &hrqe, &drqe);
736 if (rc < 0) {
737 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
738 "6409 Cannot post to HRQ %d: %x %x %x "
739 "DRQ %x %x\n",
740 rqb_entry->hrq->queue_id,
741 rqb_entry->hrq->host_index,
742 rqb_entry->hrq->hba_index,
743 rqb_entry->hrq->entry_count,
744 rqb_entry->drq->host_index,
745 rqb_entry->drq->hba_index);
746 (rqbp->rqb_free_buffer)(phba, rqb_entry);
747 } else {
748 list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list);
749 rqbp->buffer_count++;
750 }
751
752 spin_unlock_irqrestore(&phba->hbalock, flags);
753 }
754