1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2017-2022 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 Monitor */
348 if (phba->rx_monitor) {
349 lpfc_rx_monitor_destroy_ring(phba->rx_monitor);
350 kfree(phba->rx_monitor);
351 phba->rx_monitor = NULL;
352 }
353
354 /* Free the iocb lookup array */
355 kfree(psli->iocbq_lookup);
356 psli->iocbq_lookup = NULL;
357
358 return;
359 }
360
361 /**
362 * lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool
363 * @phba: HBA which owns the pool to allocate from
364 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
365 * @handle: used to return the DMA-mapped address of the mbuf
366 *
367 * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool.
368 * Allocates from generic dma_pool_alloc function first and if that fails and
369 * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the
370 * HBA's pool.
371 *
372 * Notes: Not interrupt-safe. Must be called with no locks held. Takes
373 * phba->hbalock.
374 *
375 * Returns:
376 * pointer to the allocated mbuf on success
377 * NULL on failure
378 **/
379 void *
lpfc_mbuf_alloc(struct lpfc_hba * phba,int mem_flags,dma_addr_t * handle)380 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
381 {
382 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
383 unsigned long iflags;
384 void *ret;
385
386 ret = dma_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
387
388 spin_lock_irqsave(&phba->hbalock, iflags);
389 if (!ret && (mem_flags & MEM_PRI) && pool->current_count) {
390 pool->current_count--;
391 ret = pool->elements[pool->current_count].virt;
392 *handle = pool->elements[pool->current_count].phys;
393 }
394 spin_unlock_irqrestore(&phba->hbalock, iflags);
395 return ret;
396 }
397
398 /**
399 * __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked)
400 * @phba: HBA which owns the pool to return to
401 * @virt: mbuf to free
402 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
403 *
404 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
405 * it is below its max_count, frees the mbuf otherwise.
406 *
407 * Notes: Must be called with phba->hbalock held to synchronize access to
408 * lpfc_mbuf_safety_pool.
409 *
410 * Returns: None
411 **/
412 void
__lpfc_mbuf_free(struct lpfc_hba * phba,void * virt,dma_addr_t dma)413 __lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
414 {
415 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
416
417 if (pool->current_count < pool->max_count) {
418 pool->elements[pool->current_count].virt = virt;
419 pool->elements[pool->current_count].phys = dma;
420 pool->current_count++;
421 } else {
422 dma_pool_free(phba->lpfc_mbuf_pool, virt, dma);
423 }
424 return;
425 }
426
427 /**
428 * lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked)
429 * @phba: HBA which owns the pool to return to
430 * @virt: mbuf to free
431 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
432 *
433 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
434 * it is below its max_count, frees the mbuf otherwise.
435 *
436 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
437 *
438 * Returns: None
439 **/
440 void
lpfc_mbuf_free(struct lpfc_hba * phba,void * virt,dma_addr_t dma)441 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
442 {
443 unsigned long iflags;
444
445 spin_lock_irqsave(&phba->hbalock, iflags);
446 __lpfc_mbuf_free(phba, virt, dma);
447 spin_unlock_irqrestore(&phba->hbalock, iflags);
448 return;
449 }
450
451 /**
452 * lpfc_nvmet_buf_alloc - Allocate an nvmet_buf from the
453 * lpfc_sg_dma_buf_pool PCI pool
454 * @phba: HBA which owns the pool to allocate from
455 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
456 * @handle: used to return the DMA-mapped address of the nvmet_buf
457 *
458 * Description: Allocates a DMA-mapped buffer from the lpfc_sg_dma_buf_pool
459 * PCI pool. Allocates from generic dma_pool_alloc function.
460 *
461 * Returns:
462 * pointer to the allocated nvmet_buf on success
463 * NULL on failure
464 **/
465 void *
lpfc_nvmet_buf_alloc(struct lpfc_hba * phba,int mem_flags,dma_addr_t * handle)466 lpfc_nvmet_buf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
467 {
468 void *ret;
469
470 ret = dma_pool_alloc(phba->lpfc_sg_dma_buf_pool, GFP_KERNEL, handle);
471 return ret;
472 }
473
474 /**
475 * lpfc_nvmet_buf_free - Free an nvmet_buf from the lpfc_sg_dma_buf_pool
476 * PCI pool
477 * @phba: HBA which owns the pool to return to
478 * @virt: nvmet_buf to free
479 * @dma: the DMA-mapped address of the lpfc_sg_dma_buf_pool to be freed
480 *
481 * Returns: None
482 **/
483 void
lpfc_nvmet_buf_free(struct lpfc_hba * phba,void * virt,dma_addr_t dma)484 lpfc_nvmet_buf_free(struct lpfc_hba *phba, void *virt, dma_addr_t dma)
485 {
486 dma_pool_free(phba->lpfc_sg_dma_buf_pool, virt, dma);
487 }
488
489 /**
490 * lpfc_els_hbq_alloc - Allocate an HBQ buffer
491 * @phba: HBA to allocate HBQ buffer for
492 *
493 * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hrb_pool PCI
494 * pool along a non-DMA-mapped container for it.
495 *
496 * Notes: Not interrupt-safe. Must be called with no locks held.
497 *
498 * Returns:
499 * pointer to HBQ on success
500 * NULL on failure
501 **/
502 struct hbq_dmabuf *
lpfc_els_hbq_alloc(struct lpfc_hba * phba)503 lpfc_els_hbq_alloc(struct lpfc_hba *phba)
504 {
505 struct hbq_dmabuf *hbqbp;
506
507 hbqbp = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
508 if (!hbqbp)
509 return NULL;
510
511 hbqbp->dbuf.virt = dma_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL,
512 &hbqbp->dbuf.phys);
513 if (!hbqbp->dbuf.virt) {
514 kfree(hbqbp);
515 return NULL;
516 }
517 hbqbp->total_size = LPFC_BPL_SIZE;
518 return hbqbp;
519 }
520
521 /**
522 * lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc
523 * @phba: HBA buffer was allocated for
524 * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc
525 *
526 * Description: Frees both the container and the DMA-mapped buffer returned by
527 * lpfc_els_hbq_alloc.
528 *
529 * Notes: Can be called with or without locks held.
530 *
531 * Returns: None
532 **/
533 void
lpfc_els_hbq_free(struct lpfc_hba * phba,struct hbq_dmabuf * hbqbp)534 lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp)
535 {
536 dma_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys);
537 kfree(hbqbp);
538 return;
539 }
540
541 /**
542 * lpfc_sli4_rb_alloc - Allocate an SLI4 Receive buffer
543 * @phba: HBA to allocate a receive buffer for
544 *
545 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
546 * pool along a non-DMA-mapped container for it.
547 *
548 * Notes: Not interrupt-safe. Must be called with no locks held.
549 *
550 * Returns:
551 * pointer to HBQ on success
552 * NULL on failure
553 **/
554 struct hbq_dmabuf *
lpfc_sli4_rb_alloc(struct lpfc_hba * phba)555 lpfc_sli4_rb_alloc(struct lpfc_hba *phba)
556 {
557 struct hbq_dmabuf *dma_buf;
558
559 dma_buf = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
560 if (!dma_buf)
561 return NULL;
562
563 dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
564 &dma_buf->hbuf.phys);
565 if (!dma_buf->hbuf.virt) {
566 kfree(dma_buf);
567 return NULL;
568 }
569 dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL,
570 &dma_buf->dbuf.phys);
571 if (!dma_buf->dbuf.virt) {
572 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
573 dma_buf->hbuf.phys);
574 kfree(dma_buf);
575 return NULL;
576 }
577 dma_buf->total_size = LPFC_DATA_BUF_SIZE;
578 return dma_buf;
579 }
580
581 /**
582 * lpfc_sli4_rb_free - Frees a receive buffer
583 * @phba: HBA buffer was allocated for
584 * @dmab: DMA Buffer container returned by lpfc_sli4_hbq_alloc
585 *
586 * Description: Frees both the container and the DMA-mapped buffers returned by
587 * lpfc_sli4_rb_alloc.
588 *
589 * Notes: Can be called with or without locks held.
590 *
591 * Returns: None
592 **/
593 void
lpfc_sli4_rb_free(struct lpfc_hba * phba,struct hbq_dmabuf * dmab)594 lpfc_sli4_rb_free(struct lpfc_hba *phba, struct hbq_dmabuf *dmab)
595 {
596 dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
597 dma_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys);
598 kfree(dmab);
599 }
600
601 /**
602 * lpfc_sli4_nvmet_alloc - Allocate an SLI4 Receive buffer
603 * @phba: HBA to allocate a receive buffer for
604 *
605 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
606 * pool along a non-DMA-mapped container for it.
607 *
608 * Returns:
609 * pointer to HBQ on success
610 * NULL on failure
611 **/
612 struct rqb_dmabuf *
lpfc_sli4_nvmet_alloc(struct lpfc_hba * phba)613 lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
614 {
615 struct rqb_dmabuf *dma_buf;
616
617 dma_buf = kzalloc(sizeof(*dma_buf), GFP_KERNEL);
618 if (!dma_buf)
619 return NULL;
620
621 dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
622 &dma_buf->hbuf.phys);
623 if (!dma_buf->hbuf.virt) {
624 kfree(dma_buf);
625 return NULL;
626 }
627 dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_nvmet_drb_pool,
628 GFP_KERNEL, &dma_buf->dbuf.phys);
629 if (!dma_buf->dbuf.virt) {
630 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
631 dma_buf->hbuf.phys);
632 kfree(dma_buf);
633 return NULL;
634 }
635 dma_buf->total_size = LPFC_NVMET_DATA_BUF_SIZE;
636 return dma_buf;
637 }
638
639 /**
640 * lpfc_sli4_nvmet_free - Frees a receive buffer
641 * @phba: HBA buffer was allocated for
642 * @dmab: DMA Buffer container returned by lpfc_sli4_rbq_alloc
643 *
644 * Description: Frees both the container and the DMA-mapped buffers returned by
645 * lpfc_sli4_nvmet_alloc.
646 *
647 * Notes: Can be called with or without locks held.
648 *
649 * Returns: None
650 **/
651 void
lpfc_sli4_nvmet_free(struct lpfc_hba * phba,struct rqb_dmabuf * dmab)652 lpfc_sli4_nvmet_free(struct lpfc_hba *phba, struct rqb_dmabuf *dmab)
653 {
654 dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
655 dma_pool_free(phba->lpfc_nvmet_drb_pool,
656 dmab->dbuf.virt, dmab->dbuf.phys);
657 kfree(dmab);
658 }
659
660 /**
661 * lpfc_in_buf_free - Free a DMA buffer
662 * @phba: HBA buffer is associated with
663 * @mp: Buffer to free
664 *
665 * Description: Frees the given DMA buffer in the appropriate way given if the
666 * HBA is running in SLI3 mode with HBQs enabled.
667 *
668 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
669 *
670 * Returns: None
671 **/
672 void
lpfc_in_buf_free(struct lpfc_hba * phba,struct lpfc_dmabuf * mp)673 lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
674 {
675 struct hbq_dmabuf *hbq_entry;
676 unsigned long flags;
677
678 if (!mp)
679 return;
680
681 if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
682 hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf);
683 /* Check whether HBQ is still in use */
684 spin_lock_irqsave(&phba->hbalock, flags);
685 if (!phba->hbq_in_use) {
686 spin_unlock_irqrestore(&phba->hbalock, flags);
687 return;
688 }
689 list_del(&hbq_entry->dbuf.list);
690 if (hbq_entry->tag == -1) {
691 (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
692 (phba, hbq_entry);
693 } else {
694 lpfc_sli_free_hbq(phba, hbq_entry);
695 }
696 spin_unlock_irqrestore(&phba->hbalock, flags);
697 } else {
698 lpfc_mbuf_free(phba, mp->virt, mp->phys);
699 kfree(mp);
700 }
701 return;
702 }
703
704 /**
705 * lpfc_rq_buf_free - Free a RQ DMA buffer
706 * @phba: HBA buffer is associated with
707 * @mp: Buffer to free
708 *
709 * Description: Frees the given DMA buffer in the appropriate way given by
710 * reposting it to its associated RQ so it can be reused.
711 *
712 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
713 *
714 * Returns: None
715 **/
716 void
lpfc_rq_buf_free(struct lpfc_hba * phba,struct lpfc_dmabuf * mp)717 lpfc_rq_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
718 {
719 struct lpfc_rqb *rqbp;
720 struct lpfc_rqe hrqe;
721 struct lpfc_rqe drqe;
722 struct rqb_dmabuf *rqb_entry;
723 unsigned long flags;
724 int rc;
725
726 if (!mp)
727 return;
728
729 rqb_entry = container_of(mp, struct rqb_dmabuf, hbuf);
730 rqbp = rqb_entry->hrq->rqbp;
731
732 spin_lock_irqsave(&phba->hbalock, flags);
733 list_del(&rqb_entry->hbuf.list);
734 hrqe.address_lo = putPaddrLow(rqb_entry->hbuf.phys);
735 hrqe.address_hi = putPaddrHigh(rqb_entry->hbuf.phys);
736 drqe.address_lo = putPaddrLow(rqb_entry->dbuf.phys);
737 drqe.address_hi = putPaddrHigh(rqb_entry->dbuf.phys);
738 rc = lpfc_sli4_rq_put(rqb_entry->hrq, rqb_entry->drq, &hrqe, &drqe);
739 if (rc < 0) {
740 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
741 "6409 Cannot post to HRQ %d: %x %x %x "
742 "DRQ %x %x\n",
743 rqb_entry->hrq->queue_id,
744 rqb_entry->hrq->host_index,
745 rqb_entry->hrq->hba_index,
746 rqb_entry->hrq->entry_count,
747 rqb_entry->drq->host_index,
748 rqb_entry->drq->hba_index);
749 (rqbp->rqb_free_buffer)(phba, rqb_entry);
750 } else {
751 list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list);
752 rqbp->buffer_count++;
753 }
754
755 spin_unlock_irqrestore(&phba->hbalock, flags);
756 }
757