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 <linux/nvme-fc-driver.h>
35
36 #include "lpfc_hw4.h"
37 #include "lpfc_hw.h"
38 #include "lpfc_sli.h"
39 #include "lpfc_sli4.h"
40 #include "lpfc_nl.h"
41 #include "lpfc_disc.h"
42 #include "lpfc.h"
43 #include "lpfc_scsi.h"
44 #include "lpfc_nvme.h"
45 #include "lpfc_nvmet.h"
46 #include "lpfc_crtn.h"
47 #include "lpfc_logmsg.h"
48
49 #define LPFC_MBUF_POOL_SIZE 64 /* max elements in MBUF safety pool */
50 #define LPFC_MEM_POOL_SIZE 64 /* max elem in non-DMA safety pool */
51 #define LPFC_DEVICE_DATA_POOL_SIZE 64 /* max elements in device data pool */
52
53 int
lpfc_mem_alloc_active_rrq_pool_s4(struct lpfc_hba * phba)54 lpfc_mem_alloc_active_rrq_pool_s4(struct lpfc_hba *phba) {
55 size_t bytes;
56 int max_xri = phba->sli4_hba.max_cfg_param.max_xri;
57
58 if (max_xri <= 0)
59 return -ENOMEM;
60 bytes = ((BITS_PER_LONG - 1 + max_xri) / BITS_PER_LONG) *
61 sizeof(unsigned long);
62 phba->cfg_rrq_xri_bitmap_sz = bytes;
63 phba->active_rrq_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
64 bytes);
65 if (!phba->active_rrq_pool)
66 return -ENOMEM;
67 else
68 return 0;
69 }
70
71 /**
72 * lpfc_mem_alloc - create and allocate all PCI and memory pools
73 * @phba: HBA to allocate pools for
74 *
75 * Description: Creates and allocates PCI pools lpfc_mbuf_pool,
76 * lpfc_hrb_pool. Creates and allocates kmalloc-backed mempools
77 * for LPFC_MBOXQ_t and lpfc_nodelist. Also allocates the VPI bitmask.
78 *
79 * Notes: Not interrupt-safe. Must be called with no locks held. If any
80 * allocation fails, frees all successfully allocated memory before returning.
81 *
82 * Returns:
83 * 0 on success
84 * -ENOMEM on failure (if any memory allocations fail)
85 **/
86 int
lpfc_mem_alloc(struct lpfc_hba * phba,int align)87 lpfc_mem_alloc(struct lpfc_hba *phba, int align)
88 {
89 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
90 int i;
91
92
93 phba->lpfc_mbuf_pool = dma_pool_create("lpfc_mbuf_pool", &phba->pcidev->dev,
94 LPFC_BPL_SIZE,
95 align, 0);
96 if (!phba->lpfc_mbuf_pool)
97 goto fail;
98
99 pool->elements = kmalloc_array(LPFC_MBUF_POOL_SIZE,
100 sizeof(struct lpfc_dmabuf),
101 GFP_KERNEL);
102 if (!pool->elements)
103 goto fail_free_lpfc_mbuf_pool;
104
105 pool->max_count = 0;
106 pool->current_count = 0;
107 for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
108 pool->elements[i].virt = dma_pool_alloc(phba->lpfc_mbuf_pool,
109 GFP_KERNEL, &pool->elements[i].phys);
110 if (!pool->elements[i].virt)
111 goto fail_free_mbuf_pool;
112 pool->max_count++;
113 pool->current_count++;
114 }
115
116 phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
117 sizeof(LPFC_MBOXQ_t));
118 if (!phba->mbox_mem_pool)
119 goto fail_free_mbuf_pool;
120
121 phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
122 sizeof(struct lpfc_nodelist));
123 if (!phba->nlp_mem_pool)
124 goto fail_free_mbox_pool;
125
126 if (phba->sli_rev == LPFC_SLI_REV4) {
127 phba->rrq_pool =
128 mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
129 sizeof(struct lpfc_node_rrq));
130 if (!phba->rrq_pool)
131 goto fail_free_nlp_mem_pool;
132 phba->lpfc_hrb_pool = dma_pool_create("lpfc_hrb_pool",
133 &phba->pcidev->dev,
134 LPFC_HDR_BUF_SIZE, align, 0);
135 if (!phba->lpfc_hrb_pool)
136 goto fail_free_rrq_mem_pool;
137
138 phba->lpfc_drb_pool = dma_pool_create("lpfc_drb_pool",
139 &phba->pcidev->dev,
140 LPFC_DATA_BUF_SIZE, align, 0);
141 if (!phba->lpfc_drb_pool)
142 goto fail_free_hrb_pool;
143 phba->lpfc_hbq_pool = NULL;
144 } else {
145 phba->lpfc_hbq_pool = dma_pool_create("lpfc_hbq_pool",
146 &phba->pcidev->dev, LPFC_BPL_SIZE, align, 0);
147 if (!phba->lpfc_hbq_pool)
148 goto fail_free_nlp_mem_pool;
149 phba->lpfc_hrb_pool = NULL;
150 phba->lpfc_drb_pool = NULL;
151 }
152
153 if (phba->cfg_EnableXLane) {
154 phba->device_data_mem_pool = mempool_create_kmalloc_pool(
155 LPFC_DEVICE_DATA_POOL_SIZE,
156 sizeof(struct lpfc_device_data));
157 if (!phba->device_data_mem_pool)
158 goto fail_free_drb_pool;
159 } else {
160 phba->device_data_mem_pool = NULL;
161 }
162
163 return 0;
164 fail_free_drb_pool:
165 dma_pool_destroy(phba->lpfc_drb_pool);
166 phba->lpfc_drb_pool = NULL;
167 fail_free_hrb_pool:
168 dma_pool_destroy(phba->lpfc_hrb_pool);
169 phba->lpfc_hrb_pool = NULL;
170 fail_free_rrq_mem_pool:
171 mempool_destroy(phba->rrq_pool);
172 phba->rrq_pool = NULL;
173 fail_free_nlp_mem_pool:
174 mempool_destroy(phba->nlp_mem_pool);
175 phba->nlp_mem_pool = NULL;
176 fail_free_mbox_pool:
177 mempool_destroy(phba->mbox_mem_pool);
178 phba->mbox_mem_pool = NULL;
179 fail_free_mbuf_pool:
180 while (i--)
181 dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
182 pool->elements[i].phys);
183 kfree(pool->elements);
184 fail_free_lpfc_mbuf_pool:
185 dma_pool_destroy(phba->lpfc_mbuf_pool);
186 phba->lpfc_mbuf_pool = NULL;
187 fail:
188 return -ENOMEM;
189 }
190
191 int
lpfc_nvmet_mem_alloc(struct lpfc_hba * phba)192 lpfc_nvmet_mem_alloc(struct lpfc_hba *phba)
193 {
194 phba->lpfc_nvmet_drb_pool =
195 dma_pool_create("lpfc_nvmet_drb_pool",
196 &phba->pcidev->dev, LPFC_NVMET_DATA_BUF_SIZE,
197 SGL_ALIGN_SZ, 0);
198 if (!phba->lpfc_nvmet_drb_pool) {
199 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
200 "6024 Can't enable NVME Target - no memory\n");
201 return -ENOMEM;
202 }
203 return 0;
204 }
205
206 /**
207 * lpfc_mem_free - Frees memory allocated by lpfc_mem_alloc
208 * @phba: HBA to free memory for
209 *
210 * Description: Free the memory allocated by lpfc_mem_alloc routine. This
211 * routine is a the counterpart of lpfc_mem_alloc.
212 *
213 * Returns: None
214 **/
215 void
lpfc_mem_free(struct lpfc_hba * phba)216 lpfc_mem_free(struct lpfc_hba *phba)
217 {
218 int i;
219 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
220 struct lpfc_device_data *device_data;
221
222 /* Free HBQ pools */
223 lpfc_sli_hbqbuf_free_all(phba);
224 dma_pool_destroy(phba->lpfc_nvmet_drb_pool);
225 phba->lpfc_nvmet_drb_pool = NULL;
226
227 dma_pool_destroy(phba->lpfc_drb_pool);
228 phba->lpfc_drb_pool = NULL;
229
230 dma_pool_destroy(phba->lpfc_hrb_pool);
231 phba->lpfc_hrb_pool = NULL;
232
233 dma_pool_destroy(phba->txrdy_payload_pool);
234 phba->txrdy_payload_pool = NULL;
235
236 dma_pool_destroy(phba->lpfc_hbq_pool);
237 phba->lpfc_hbq_pool = NULL;
238
239 mempool_destroy(phba->rrq_pool);
240 phba->rrq_pool = NULL;
241
242 /* Free NLP memory pool */
243 mempool_destroy(phba->nlp_mem_pool);
244 phba->nlp_mem_pool = NULL;
245 if (phba->sli_rev == LPFC_SLI_REV4 && phba->active_rrq_pool) {
246 mempool_destroy(phba->active_rrq_pool);
247 phba->active_rrq_pool = NULL;
248 }
249
250 /* Free mbox memory pool */
251 mempool_destroy(phba->mbox_mem_pool);
252 phba->mbox_mem_pool = NULL;
253
254 /* Free MBUF memory pool */
255 for (i = 0; i < pool->current_count; i++)
256 dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
257 pool->elements[i].phys);
258 kfree(pool->elements);
259
260 dma_pool_destroy(phba->lpfc_mbuf_pool);
261 phba->lpfc_mbuf_pool = NULL;
262
263 /* Free Device Data memory pool */
264 if (phba->device_data_mem_pool) {
265 /* Ensure all objects have been returned to the pool */
266 while (!list_empty(&phba->luns)) {
267 device_data = list_first_entry(&phba->luns,
268 struct lpfc_device_data,
269 listentry);
270 list_del(&device_data->listentry);
271 mempool_free(device_data, phba->device_data_mem_pool);
272 }
273 mempool_destroy(phba->device_data_mem_pool);
274 }
275 phba->device_data_mem_pool = NULL;
276 return;
277 }
278
279 /**
280 * lpfc_mem_free_all - Frees all PCI and driver memory
281 * @phba: HBA to free memory for
282 *
283 * Description: Free memory from PCI and driver memory pools and also those
284 * used : lpfc_sg_dma_buf_pool, lpfc_mbuf_pool, lpfc_hrb_pool. Frees
285 * kmalloc-backed mempools for LPFC_MBOXQ_t and lpfc_nodelist. Also frees
286 * the VPI bitmask.
287 *
288 * Returns: None
289 **/
290 void
lpfc_mem_free_all(struct lpfc_hba * phba)291 lpfc_mem_free_all(struct lpfc_hba *phba)
292 {
293 struct lpfc_sli *psli = &phba->sli;
294 LPFC_MBOXQ_t *mbox, *next_mbox;
295 struct lpfc_dmabuf *mp;
296
297 /* Free memory used in mailbox queue back to mailbox memory pool */
298 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
299 mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
300 if (mp) {
301 lpfc_mbuf_free(phba, mp->virt, mp->phys);
302 kfree(mp);
303 }
304 list_del(&mbox->list);
305 mempool_free(mbox, phba->mbox_mem_pool);
306 }
307 /* Free memory used in mailbox cmpl list back to mailbox memory pool */
308 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq_cmpl, list) {
309 mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
310 if (mp) {
311 lpfc_mbuf_free(phba, mp->virt, mp->phys);
312 kfree(mp);
313 }
314 list_del(&mbox->list);
315 mempool_free(mbox, phba->mbox_mem_pool);
316 }
317 /* Free the active mailbox command back to the mailbox memory pool */
318 spin_lock_irq(&phba->hbalock);
319 psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
320 spin_unlock_irq(&phba->hbalock);
321 if (psli->mbox_active) {
322 mbox = psli->mbox_active;
323 mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
324 if (mp) {
325 lpfc_mbuf_free(phba, mp->virt, mp->phys);
326 kfree(mp);
327 }
328 mempool_free(mbox, phba->mbox_mem_pool);
329 psli->mbox_active = NULL;
330 }
331
332 /* Free and destroy all the allocated memory pools */
333 lpfc_mem_free(phba);
334
335 /* Free DMA buffer memory pool */
336 dma_pool_destroy(phba->lpfc_sg_dma_buf_pool);
337 phba->lpfc_sg_dma_buf_pool = NULL;
338
339 dma_pool_destroy(phba->lpfc_cmd_rsp_buf_pool);
340 phba->lpfc_cmd_rsp_buf_pool = NULL;
341
342 /* Free the iocb lookup array */
343 kfree(psli->iocbq_lookup);
344 psli->iocbq_lookup = NULL;
345
346 return;
347 }
348
349 /**
350 * lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool
351 * @phba: HBA which owns the pool to allocate from
352 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
353 * @handle: used to return the DMA-mapped address of the mbuf
354 *
355 * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool.
356 * Allocates from generic dma_pool_alloc function first and if that fails and
357 * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the
358 * HBA's pool.
359 *
360 * Notes: Not interrupt-safe. Must be called with no locks held. Takes
361 * phba->hbalock.
362 *
363 * Returns:
364 * pointer to the allocated mbuf on success
365 * NULL on failure
366 **/
367 void *
lpfc_mbuf_alloc(struct lpfc_hba * phba,int mem_flags,dma_addr_t * handle)368 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
369 {
370 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
371 unsigned long iflags;
372 void *ret;
373
374 ret = dma_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
375
376 spin_lock_irqsave(&phba->hbalock, iflags);
377 if (!ret && (mem_flags & MEM_PRI) && pool->current_count) {
378 pool->current_count--;
379 ret = pool->elements[pool->current_count].virt;
380 *handle = pool->elements[pool->current_count].phys;
381 }
382 spin_unlock_irqrestore(&phba->hbalock, iflags);
383 return ret;
384 }
385
386 /**
387 * __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked)
388 * @phba: HBA which owns the pool to return to
389 * @virt: mbuf to free
390 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
391 *
392 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
393 * it is below its max_count, frees the mbuf otherwise.
394 *
395 * Notes: Must be called with phba->hbalock held to synchronize access to
396 * lpfc_mbuf_safety_pool.
397 *
398 * Returns: None
399 **/
400 void
__lpfc_mbuf_free(struct lpfc_hba * phba,void * virt,dma_addr_t dma)401 __lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
402 {
403 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
404
405 if (pool->current_count < pool->max_count) {
406 pool->elements[pool->current_count].virt = virt;
407 pool->elements[pool->current_count].phys = dma;
408 pool->current_count++;
409 } else {
410 dma_pool_free(phba->lpfc_mbuf_pool, virt, dma);
411 }
412 return;
413 }
414
415 /**
416 * lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked)
417 * @phba: HBA which owns the pool to return to
418 * @virt: mbuf to free
419 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
420 *
421 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
422 * it is below its max_count, frees the mbuf otherwise.
423 *
424 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
425 *
426 * Returns: None
427 **/
428 void
lpfc_mbuf_free(struct lpfc_hba * phba,void * virt,dma_addr_t dma)429 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
430 {
431 unsigned long iflags;
432
433 spin_lock_irqsave(&phba->hbalock, iflags);
434 __lpfc_mbuf_free(phba, virt, dma);
435 spin_unlock_irqrestore(&phba->hbalock, iflags);
436 return;
437 }
438
439 /**
440 * lpfc_nvmet_buf_alloc - Allocate an nvmet_buf from the
441 * lpfc_sg_dma_buf_pool PCI pool
442 * @phba: HBA which owns the pool to allocate from
443 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
444 * @handle: used to return the DMA-mapped address of the nvmet_buf
445 *
446 * Description: Allocates a DMA-mapped buffer from the lpfc_sg_dma_buf_pool
447 * PCI pool. Allocates from generic dma_pool_alloc function.
448 *
449 * Returns:
450 * pointer to the allocated nvmet_buf on success
451 * NULL on failure
452 **/
453 void *
lpfc_nvmet_buf_alloc(struct lpfc_hba * phba,int mem_flags,dma_addr_t * handle)454 lpfc_nvmet_buf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
455 {
456 void *ret;
457
458 ret = dma_pool_alloc(phba->lpfc_sg_dma_buf_pool, GFP_KERNEL, handle);
459 return ret;
460 }
461
462 /**
463 * lpfc_nvmet_buf_free - Free an nvmet_buf from the lpfc_sg_dma_buf_pool
464 * PCI pool
465 * @phba: HBA which owns the pool to return to
466 * @virt: nvmet_buf to free
467 * @dma: the DMA-mapped address of the lpfc_sg_dma_buf_pool to be freed
468 *
469 * Returns: None
470 **/
471 void
lpfc_nvmet_buf_free(struct lpfc_hba * phba,void * virt,dma_addr_t dma)472 lpfc_nvmet_buf_free(struct lpfc_hba *phba, void *virt, dma_addr_t dma)
473 {
474 dma_pool_free(phba->lpfc_sg_dma_buf_pool, virt, dma);
475 }
476
477 /**
478 * lpfc_els_hbq_alloc - Allocate an HBQ buffer
479 * @phba: HBA to allocate HBQ buffer for
480 *
481 * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hrb_pool PCI
482 * pool along a non-DMA-mapped container for it.
483 *
484 * Notes: Not interrupt-safe. Must be called with no locks held.
485 *
486 * Returns:
487 * pointer to HBQ on success
488 * NULL on failure
489 **/
490 struct hbq_dmabuf *
lpfc_els_hbq_alloc(struct lpfc_hba * phba)491 lpfc_els_hbq_alloc(struct lpfc_hba *phba)
492 {
493 struct hbq_dmabuf *hbqbp;
494
495 hbqbp = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
496 if (!hbqbp)
497 return NULL;
498
499 hbqbp->dbuf.virt = dma_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL,
500 &hbqbp->dbuf.phys);
501 if (!hbqbp->dbuf.virt) {
502 kfree(hbqbp);
503 return NULL;
504 }
505 hbqbp->total_size = LPFC_BPL_SIZE;
506 return hbqbp;
507 }
508
509 /**
510 * lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc
511 * @phba: HBA buffer was allocated for
512 * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc
513 *
514 * Description: Frees both the container and the DMA-mapped buffer returned by
515 * lpfc_els_hbq_alloc.
516 *
517 * Notes: Can be called with or without locks held.
518 *
519 * Returns: None
520 **/
521 void
lpfc_els_hbq_free(struct lpfc_hba * phba,struct hbq_dmabuf * hbqbp)522 lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp)
523 {
524 dma_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys);
525 kfree(hbqbp);
526 return;
527 }
528
529 /**
530 * lpfc_sli4_rb_alloc - Allocate an SLI4 Receive buffer
531 * @phba: HBA to allocate a receive buffer for
532 *
533 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
534 * pool along a non-DMA-mapped container for it.
535 *
536 * Notes: Not interrupt-safe. Must be called with no locks held.
537 *
538 * Returns:
539 * pointer to HBQ on success
540 * NULL on failure
541 **/
542 struct hbq_dmabuf *
lpfc_sli4_rb_alloc(struct lpfc_hba * phba)543 lpfc_sli4_rb_alloc(struct lpfc_hba *phba)
544 {
545 struct hbq_dmabuf *dma_buf;
546
547 dma_buf = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
548 if (!dma_buf)
549 return NULL;
550
551 dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
552 &dma_buf->hbuf.phys);
553 if (!dma_buf->hbuf.virt) {
554 kfree(dma_buf);
555 return NULL;
556 }
557 dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL,
558 &dma_buf->dbuf.phys);
559 if (!dma_buf->dbuf.virt) {
560 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
561 dma_buf->hbuf.phys);
562 kfree(dma_buf);
563 return NULL;
564 }
565 dma_buf->total_size = LPFC_DATA_BUF_SIZE;
566 return dma_buf;
567 }
568
569 /**
570 * lpfc_sli4_rb_free - Frees a receive buffer
571 * @phba: HBA buffer was allocated for
572 * @dmab: DMA Buffer container returned by lpfc_sli4_hbq_alloc
573 *
574 * Description: Frees both the container and the DMA-mapped buffers returned by
575 * lpfc_sli4_rb_alloc.
576 *
577 * Notes: Can be called with or without locks held.
578 *
579 * Returns: None
580 **/
581 void
lpfc_sli4_rb_free(struct lpfc_hba * phba,struct hbq_dmabuf * dmab)582 lpfc_sli4_rb_free(struct lpfc_hba *phba, struct hbq_dmabuf *dmab)
583 {
584 dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
585 dma_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys);
586 kfree(dmab);
587 }
588
589 /**
590 * lpfc_sli4_nvmet_alloc - Allocate an SLI4 Receive buffer
591 * @phba: HBA to allocate a receive buffer for
592 *
593 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
594 * pool along a non-DMA-mapped container for it.
595 *
596 * Notes: Not interrupt-safe. Must be called with no locks held.
597 *
598 * Returns:
599 * pointer to HBQ on success
600 * NULL on failure
601 **/
602 struct rqb_dmabuf *
lpfc_sli4_nvmet_alloc(struct lpfc_hba * phba)603 lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
604 {
605 struct rqb_dmabuf *dma_buf;
606
607 dma_buf = kzalloc(sizeof(struct rqb_dmabuf), GFP_KERNEL);
608 if (!dma_buf)
609 return NULL;
610
611 dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
612 &dma_buf->hbuf.phys);
613 if (!dma_buf->hbuf.virt) {
614 kfree(dma_buf);
615 return NULL;
616 }
617 dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_nvmet_drb_pool,
618 GFP_KERNEL, &dma_buf->dbuf.phys);
619 if (!dma_buf->dbuf.virt) {
620 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
621 dma_buf->hbuf.phys);
622 kfree(dma_buf);
623 return NULL;
624 }
625 dma_buf->total_size = LPFC_NVMET_DATA_BUF_SIZE;
626 return dma_buf;
627 }
628
629 /**
630 * lpfc_sli4_nvmet_free - Frees a receive buffer
631 * @phba: HBA buffer was allocated for
632 * @dmab: DMA Buffer container returned by lpfc_sli4_rbq_alloc
633 *
634 * Description: Frees both the container and the DMA-mapped buffers returned by
635 * lpfc_sli4_nvmet_alloc.
636 *
637 * Notes: Can be called with or without locks held.
638 *
639 * Returns: None
640 **/
641 void
lpfc_sli4_nvmet_free(struct lpfc_hba * phba,struct rqb_dmabuf * dmab)642 lpfc_sli4_nvmet_free(struct lpfc_hba *phba, struct rqb_dmabuf *dmab)
643 {
644 dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
645 dma_pool_free(phba->lpfc_nvmet_drb_pool,
646 dmab->dbuf.virt, dmab->dbuf.phys);
647 kfree(dmab);
648 }
649
650 /**
651 * lpfc_in_buf_free - Free a DMA buffer
652 * @phba: HBA buffer is associated with
653 * @mp: Buffer to free
654 *
655 * Description: Frees the given DMA buffer in the appropriate way given if the
656 * HBA is running in SLI3 mode with HBQs enabled.
657 *
658 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
659 *
660 * Returns: None
661 **/
662 void
lpfc_in_buf_free(struct lpfc_hba * phba,struct lpfc_dmabuf * mp)663 lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
664 {
665 struct hbq_dmabuf *hbq_entry;
666 unsigned long flags;
667
668 if (!mp)
669 return;
670
671 if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
672 hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf);
673 /* Check whether HBQ is still in use */
674 spin_lock_irqsave(&phba->hbalock, flags);
675 if (!phba->hbq_in_use) {
676 spin_unlock_irqrestore(&phba->hbalock, flags);
677 return;
678 }
679 list_del(&hbq_entry->dbuf.list);
680 if (hbq_entry->tag == -1) {
681 (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
682 (phba, hbq_entry);
683 } else {
684 lpfc_sli_free_hbq(phba, hbq_entry);
685 }
686 spin_unlock_irqrestore(&phba->hbalock, flags);
687 } else {
688 lpfc_mbuf_free(phba, mp->virt, mp->phys);
689 kfree(mp);
690 }
691 return;
692 }
693
694 /**
695 * lpfc_rq_buf_free - Free a RQ DMA buffer
696 * @phba: HBA buffer is associated with
697 * @mp: Buffer to free
698 *
699 * Description: Frees the given DMA buffer in the appropriate way given by
700 * reposting it to its associated RQ so it can be reused.
701 *
702 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
703 *
704 * Returns: None
705 **/
706 void
lpfc_rq_buf_free(struct lpfc_hba * phba,struct lpfc_dmabuf * mp)707 lpfc_rq_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
708 {
709 struct lpfc_rqb *rqbp;
710 struct lpfc_rqe hrqe;
711 struct lpfc_rqe drqe;
712 struct rqb_dmabuf *rqb_entry;
713 unsigned long flags;
714 int rc;
715
716 if (!mp)
717 return;
718
719 rqb_entry = container_of(mp, struct rqb_dmabuf, hbuf);
720 rqbp = rqb_entry->hrq->rqbp;
721
722 spin_lock_irqsave(&phba->hbalock, flags);
723 list_del(&rqb_entry->hbuf.list);
724 hrqe.address_lo = putPaddrLow(rqb_entry->hbuf.phys);
725 hrqe.address_hi = putPaddrHigh(rqb_entry->hbuf.phys);
726 drqe.address_lo = putPaddrLow(rqb_entry->dbuf.phys);
727 drqe.address_hi = putPaddrHigh(rqb_entry->dbuf.phys);
728 rc = lpfc_sli4_rq_put(rqb_entry->hrq, rqb_entry->drq, &hrqe, &drqe);
729 if (rc < 0) {
730 (rqbp->rqb_free_buffer)(phba, rqb_entry);
731 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
732 "6409 Cannot post to HRQ %d: %x %x %x "
733 "DRQ %x %x\n",
734 rqb_entry->hrq->queue_id,
735 rqb_entry->hrq->host_index,
736 rqb_entry->hrq->hba_index,
737 rqb_entry->hrq->entry_count,
738 rqb_entry->drq->host_index,
739 rqb_entry->drq->hba_index);
740 } else {
741 list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list);
742 rqbp->buffer_count++;
743 }
744
745 spin_unlock_irqrestore(&phba->hbalock, flags);
746 }
747
