1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2017-2023 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 /* lpfc_mbox_free_sli_mbox
52 *
53 * @phba: HBA to free memory for
54 * @mbox: mailbox command to free
55 *
56 * This routine detects the mbox type and calls the correct
57 * free routine to fully release all associated memory.
58 */
59 static void
lpfc_mem_free_sli_mbox(struct lpfc_hba * phba,LPFC_MBOXQ_t * mbox)60 lpfc_mem_free_sli_mbox(struct lpfc_hba *phba, LPFC_MBOXQ_t *mbox)
61 {
62 /* Detect if the caller's mbox is an SLI4_CONFIG type. If so, this
63 * mailbox type requires a different cleanup routine. Otherwise, the
64 * mailbox is just an mbuf and mem_pool release.
65 */
66 if (phba->sli_rev == LPFC_SLI_REV4 &&
67 bf_get(lpfc_mqe_command, &mbox->u.mqe) == MBX_SLI4_CONFIG) {
68 lpfc_sli4_mbox_cmd_free(phba, mbox);
69 } else {
70 lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED);
71 }
72 }
73
74 int
lpfc_mem_alloc_active_rrq_pool_s4(struct lpfc_hba * phba)75 lpfc_mem_alloc_active_rrq_pool_s4(struct lpfc_hba *phba) {
76 size_t bytes;
77 int max_xri = phba->sli4_hba.max_cfg_param.max_xri;
78
79 if (max_xri <= 0)
80 return -ENOMEM;
81 bytes = ((BITS_PER_LONG - 1 + max_xri) / BITS_PER_LONG) *
82 sizeof(unsigned long);
83 phba->cfg_rrq_xri_bitmap_sz = bytes;
84 phba->active_rrq_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
85 bytes);
86 if (!phba->active_rrq_pool)
87 return -ENOMEM;
88 else
89 return 0;
90 }
91
92 /**
93 * lpfc_mem_alloc - create and allocate all PCI and memory pools
94 * @phba: HBA to allocate pools for
95 * @align: alignment requirement for blocks; must be a power of two
96 *
97 * Description: Creates and allocates PCI pools lpfc_mbuf_pool,
98 * lpfc_hrb_pool. Creates and allocates kmalloc-backed mempools
99 * for LPFC_MBOXQ_t and lpfc_nodelist. Also allocates the VPI bitmask.
100 *
101 * Notes: Not interrupt-safe. Must be called with no locks held. If any
102 * allocation fails, frees all successfully allocated memory before returning.
103 *
104 * Returns:
105 * 0 on success
106 * -ENOMEM on failure (if any memory allocations fail)
107 **/
108 int
lpfc_mem_alloc(struct lpfc_hba * phba,int align)109 lpfc_mem_alloc(struct lpfc_hba *phba, int align)
110 {
111 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
112 int i;
113
114
115 phba->lpfc_mbuf_pool = dma_pool_create("lpfc_mbuf_pool", &phba->pcidev->dev,
116 LPFC_BPL_SIZE,
117 align, 0);
118 if (!phba->lpfc_mbuf_pool)
119 goto fail;
120
121 pool->elements = kmalloc_array(LPFC_MBUF_POOL_SIZE,
122 sizeof(struct lpfc_dmabuf),
123 GFP_KERNEL);
124 if (!pool->elements)
125 goto fail_free_lpfc_mbuf_pool;
126
127 pool->max_count = 0;
128 pool->current_count = 0;
129 for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
130 pool->elements[i].virt = dma_pool_alloc(phba->lpfc_mbuf_pool,
131 GFP_KERNEL, &pool->elements[i].phys);
132 if (!pool->elements[i].virt)
133 goto fail_free_mbuf_pool;
134 pool->max_count++;
135 pool->current_count++;
136 }
137
138 phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MBX_POOL_SIZE,
139 sizeof(LPFC_MBOXQ_t));
140 if (!phba->mbox_mem_pool)
141 goto fail_free_mbuf_pool;
142
143 phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
144 sizeof(struct lpfc_nodelist));
145 if (!phba->nlp_mem_pool)
146 goto fail_free_mbox_pool;
147
148 if (phba->sli_rev == LPFC_SLI_REV4) {
149 phba->rrq_pool =
150 mempool_create_kmalloc_pool(LPFC_RRQ_POOL_SIZE,
151 sizeof(struct lpfc_node_rrq));
152 if (!phba->rrq_pool)
153 goto fail_free_nlp_mem_pool;
154 phba->lpfc_hrb_pool = dma_pool_create("lpfc_hrb_pool",
155 &phba->pcidev->dev,
156 LPFC_HDR_BUF_SIZE, align, 0);
157 if (!phba->lpfc_hrb_pool)
158 goto fail_free_rrq_mem_pool;
159
160 phba->lpfc_drb_pool = dma_pool_create("lpfc_drb_pool",
161 &phba->pcidev->dev,
162 LPFC_DATA_BUF_SIZE, align, 0);
163 if (!phba->lpfc_drb_pool)
164 goto fail_free_hrb_pool;
165 phba->lpfc_hbq_pool = NULL;
166 } else {
167 phba->lpfc_hbq_pool = dma_pool_create("lpfc_hbq_pool",
168 &phba->pcidev->dev, LPFC_BPL_SIZE, align, 0);
169 if (!phba->lpfc_hbq_pool)
170 goto fail_free_nlp_mem_pool;
171 phba->lpfc_hrb_pool = NULL;
172 phba->lpfc_drb_pool = NULL;
173 }
174
175 if (phba->cfg_EnableXLane) {
176 phba->device_data_mem_pool = mempool_create_kmalloc_pool(
177 LPFC_DEVICE_DATA_POOL_SIZE,
178 sizeof(struct lpfc_device_data));
179 if (!phba->device_data_mem_pool)
180 goto fail_free_drb_pool;
181 } else {
182 phba->device_data_mem_pool = NULL;
183 }
184
185 return 0;
186 fail_free_drb_pool:
187 dma_pool_destroy(phba->lpfc_drb_pool);
188 phba->lpfc_drb_pool = NULL;
189 fail_free_hrb_pool:
190 dma_pool_destroy(phba->lpfc_hrb_pool);
191 phba->lpfc_hrb_pool = NULL;
192 fail_free_rrq_mem_pool:
193 mempool_destroy(phba->rrq_pool);
194 phba->rrq_pool = NULL;
195 fail_free_nlp_mem_pool:
196 mempool_destroy(phba->nlp_mem_pool);
197 phba->nlp_mem_pool = NULL;
198 fail_free_mbox_pool:
199 mempool_destroy(phba->mbox_mem_pool);
200 phba->mbox_mem_pool = NULL;
201 fail_free_mbuf_pool:
202 while (i--)
203 dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
204 pool->elements[i].phys);
205 kfree(pool->elements);
206 fail_free_lpfc_mbuf_pool:
207 dma_pool_destroy(phba->lpfc_mbuf_pool);
208 phba->lpfc_mbuf_pool = NULL;
209 fail:
210 return -ENOMEM;
211 }
212
213 int
lpfc_nvmet_mem_alloc(struct lpfc_hba * phba)214 lpfc_nvmet_mem_alloc(struct lpfc_hba *phba)
215 {
216 phba->lpfc_nvmet_drb_pool =
217 dma_pool_create("lpfc_nvmet_drb_pool",
218 &phba->pcidev->dev, LPFC_NVMET_DATA_BUF_SIZE,
219 SGL_ALIGN_SZ, 0);
220 if (!phba->lpfc_nvmet_drb_pool) {
221 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
222 "6024 Can't enable NVME Target - no memory\n");
223 return -ENOMEM;
224 }
225 return 0;
226 }
227
228 /**
229 * lpfc_mem_free - Frees memory allocated by lpfc_mem_alloc
230 * @phba: HBA to free memory for
231 *
232 * Description: Free the memory allocated by lpfc_mem_alloc routine. This
233 * routine is a the counterpart of lpfc_mem_alloc.
234 *
235 * Returns: None
236 **/
237 void
lpfc_mem_free(struct lpfc_hba * phba)238 lpfc_mem_free(struct lpfc_hba *phba)
239 {
240 int i;
241 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
242 struct lpfc_device_data *device_data;
243
244 /* Free HBQ pools */
245 lpfc_sli_hbqbuf_free_all(phba);
246 dma_pool_destroy(phba->lpfc_nvmet_drb_pool);
247 phba->lpfc_nvmet_drb_pool = NULL;
248
249 dma_pool_destroy(phba->lpfc_drb_pool);
250 phba->lpfc_drb_pool = NULL;
251
252 dma_pool_destroy(phba->lpfc_hrb_pool);
253 phba->lpfc_hrb_pool = NULL;
254
255 dma_pool_destroy(phba->lpfc_hbq_pool);
256 phba->lpfc_hbq_pool = NULL;
257
258 mempool_destroy(phba->rrq_pool);
259 phba->rrq_pool = NULL;
260
261 /* Free NLP memory pool */
262 mempool_destroy(phba->nlp_mem_pool);
263 phba->nlp_mem_pool = NULL;
264 if (phba->sli_rev == LPFC_SLI_REV4 && phba->active_rrq_pool) {
265 mempool_destroy(phba->active_rrq_pool);
266 phba->active_rrq_pool = NULL;
267 }
268
269 /* Free mbox memory pool */
270 mempool_destroy(phba->mbox_mem_pool);
271 phba->mbox_mem_pool = NULL;
272
273 /* Free MBUF memory pool */
274 for (i = 0; i < pool->current_count; i++)
275 dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
276 pool->elements[i].phys);
277 kfree(pool->elements);
278
279 dma_pool_destroy(phba->lpfc_mbuf_pool);
280 phba->lpfc_mbuf_pool = NULL;
281
282 /* Free Device Data memory pool */
283 if (phba->device_data_mem_pool) {
284 /* Ensure all objects have been returned to the pool */
285 while (!list_empty(&phba->luns)) {
286 device_data = list_first_entry(&phba->luns,
287 struct lpfc_device_data,
288 listentry);
289 list_del(&device_data->listentry);
290 mempool_free(device_data, phba->device_data_mem_pool);
291 }
292 mempool_destroy(phba->device_data_mem_pool);
293 }
294 phba->device_data_mem_pool = NULL;
295 return;
296 }
297
298 /**
299 * lpfc_mem_free_all - Frees all PCI and driver memory
300 * @phba: HBA to free memory for
301 *
302 * Description: Free memory from PCI and driver memory pools and also those
303 * used : lpfc_sg_dma_buf_pool, lpfc_mbuf_pool, lpfc_hrb_pool. Frees
304 * kmalloc-backed mempools for LPFC_MBOXQ_t and lpfc_nodelist. Also frees
305 * the VPI bitmask.
306 *
307 * Returns: None
308 **/
309 void
lpfc_mem_free_all(struct lpfc_hba * phba)310 lpfc_mem_free_all(struct lpfc_hba *phba)
311 {
312 struct lpfc_sli *psli = &phba->sli;
313 LPFC_MBOXQ_t *mbox, *next_mbox;
314
315 /* Free memory used in mailbox queue back to mailbox memory pool */
316 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
317 list_del(&mbox->list);
318 lpfc_mem_free_sli_mbox(phba, mbox);
319 }
320 /* Free memory used in mailbox cmpl list back to mailbox memory pool */
321 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq_cmpl, list) {
322 list_del(&mbox->list);
323 lpfc_mem_free_sli_mbox(phba, mbox);
324 }
325 /* Free the active mailbox command back to the mailbox memory pool */
326 spin_lock_irq(&phba->hbalock);
327 psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
328 spin_unlock_irq(&phba->hbalock);
329 if (psli->mbox_active) {
330 mbox = psli->mbox_active;
331 lpfc_mem_free_sli_mbox(phba, mbox);
332 psli->mbox_active = NULL;
333 }
334
335 /* Free and destroy all the allocated memory pools */
336 lpfc_mem_free(phba);
337
338 /* Free DMA buffer memory pool */
339 dma_pool_destroy(phba->lpfc_sg_dma_buf_pool);
340 phba->lpfc_sg_dma_buf_pool = NULL;
341
342 dma_pool_destroy(phba->lpfc_cmd_rsp_buf_pool);
343 phba->lpfc_cmd_rsp_buf_pool = NULL;
344
345 /* Free Congestion Data buffer */
346 if (phba->cgn_i) {
347 dma_free_coherent(&phba->pcidev->dev,
348 sizeof(struct lpfc_cgn_info),
349 phba->cgn_i->virt, phba->cgn_i->phys);
350 kfree(phba->cgn_i);
351 phba->cgn_i = NULL;
352 }
353
354 /* Free RX Monitor */
355 if (phba->rx_monitor) {
356 lpfc_rx_monitor_destroy_ring(phba->rx_monitor);
357 kfree(phba->rx_monitor);
358 phba->rx_monitor = NULL;
359 }
360
361 /* Free the iocb lookup array */
362 kfree(psli->iocbq_lookup);
363 psli->iocbq_lookup = NULL;
364
365 return;
366 }
367
368 /**
369 * lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool
370 * @phba: HBA which owns the pool to allocate from
371 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
372 * @handle: used to return the DMA-mapped address of the mbuf
373 *
374 * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool.
375 * Allocates from generic dma_pool_alloc function first and if that fails and
376 * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the
377 * HBA's pool.
378 *
379 * Notes: Not interrupt-safe. Must be called with no locks held. Takes
380 * phba->hbalock.
381 *
382 * Returns:
383 * pointer to the allocated mbuf on success
384 * NULL on failure
385 **/
386 void *
lpfc_mbuf_alloc(struct lpfc_hba * phba,int mem_flags,dma_addr_t * handle)387 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
388 {
389 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
390 unsigned long iflags;
391 void *ret;
392
393 ret = dma_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
394
395 spin_lock_irqsave(&phba->hbalock, iflags);
396 if (!ret && (mem_flags & MEM_PRI) && pool->current_count) {
397 pool->current_count--;
398 ret = pool->elements[pool->current_count].virt;
399 *handle = pool->elements[pool->current_count].phys;
400 }
401 spin_unlock_irqrestore(&phba->hbalock, iflags);
402 return ret;
403 }
404
405 /**
406 * __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked)
407 * @phba: HBA which owns the pool to return to
408 * @virt: mbuf to free
409 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
410 *
411 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
412 * it is below its max_count, frees the mbuf otherwise.
413 *
414 * Notes: Must be called with phba->hbalock held to synchronize access to
415 * lpfc_mbuf_safety_pool.
416 *
417 * Returns: None
418 **/
419 void
__lpfc_mbuf_free(struct lpfc_hba * phba,void * virt,dma_addr_t dma)420 __lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
421 {
422 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
423
424 if (pool->current_count < pool->max_count) {
425 pool->elements[pool->current_count].virt = virt;
426 pool->elements[pool->current_count].phys = dma;
427 pool->current_count++;
428 } else {
429 dma_pool_free(phba->lpfc_mbuf_pool, virt, dma);
430 }
431 return;
432 }
433
434 /**
435 * lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked)
436 * @phba: HBA which owns the pool to return to
437 * @virt: mbuf to free
438 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
439 *
440 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
441 * it is below its max_count, frees the mbuf otherwise.
442 *
443 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
444 *
445 * Returns: None
446 **/
447 void
lpfc_mbuf_free(struct lpfc_hba * phba,void * virt,dma_addr_t dma)448 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
449 {
450 unsigned long iflags;
451
452 spin_lock_irqsave(&phba->hbalock, iflags);
453 __lpfc_mbuf_free(phba, virt, dma);
454 spin_unlock_irqrestore(&phba->hbalock, iflags);
455 return;
456 }
457
458 /**
459 * lpfc_nvmet_buf_alloc - Allocate an nvmet_buf from the
460 * lpfc_sg_dma_buf_pool PCI pool
461 * @phba: HBA which owns the pool to allocate from
462 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
463 * @handle: used to return the DMA-mapped address of the nvmet_buf
464 *
465 * Description: Allocates a DMA-mapped buffer from the lpfc_sg_dma_buf_pool
466 * PCI pool. Allocates from generic dma_pool_alloc function.
467 *
468 * Returns:
469 * pointer to the allocated nvmet_buf on success
470 * NULL on failure
471 **/
472 void *
lpfc_nvmet_buf_alloc(struct lpfc_hba * phba,int mem_flags,dma_addr_t * handle)473 lpfc_nvmet_buf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
474 {
475 void *ret;
476
477 ret = dma_pool_alloc(phba->lpfc_sg_dma_buf_pool, GFP_KERNEL, handle);
478 return ret;
479 }
480
481 /**
482 * lpfc_nvmet_buf_free - Free an nvmet_buf from the lpfc_sg_dma_buf_pool
483 * PCI pool
484 * @phba: HBA which owns the pool to return to
485 * @virt: nvmet_buf to free
486 * @dma: the DMA-mapped address of the lpfc_sg_dma_buf_pool to be freed
487 *
488 * Returns: None
489 **/
490 void
lpfc_nvmet_buf_free(struct lpfc_hba * phba,void * virt,dma_addr_t dma)491 lpfc_nvmet_buf_free(struct lpfc_hba *phba, void *virt, dma_addr_t dma)
492 {
493 dma_pool_free(phba->lpfc_sg_dma_buf_pool, virt, dma);
494 }
495
496 /**
497 * lpfc_els_hbq_alloc - Allocate an HBQ buffer
498 * @phba: HBA to allocate HBQ buffer for
499 *
500 * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hrb_pool PCI
501 * pool along a non-DMA-mapped container for it.
502 *
503 * Notes: Not interrupt-safe. Must be called with no locks held.
504 *
505 * Returns:
506 * pointer to HBQ on success
507 * NULL on failure
508 **/
509 struct hbq_dmabuf *
lpfc_els_hbq_alloc(struct lpfc_hba * phba)510 lpfc_els_hbq_alloc(struct lpfc_hba *phba)
511 {
512 struct hbq_dmabuf *hbqbp;
513
514 hbqbp = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
515 if (!hbqbp)
516 return NULL;
517
518 hbqbp->dbuf.virt = dma_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL,
519 &hbqbp->dbuf.phys);
520 if (!hbqbp->dbuf.virt) {
521 kfree(hbqbp);
522 return NULL;
523 }
524 hbqbp->total_size = LPFC_BPL_SIZE;
525 return hbqbp;
526 }
527
528 /**
529 * lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc
530 * @phba: HBA buffer was allocated for
531 * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc
532 *
533 * Description: Frees both the container and the DMA-mapped buffer returned by
534 * lpfc_els_hbq_alloc.
535 *
536 * Notes: Can be called with or without locks held.
537 *
538 * Returns: None
539 **/
540 void
lpfc_els_hbq_free(struct lpfc_hba * phba,struct hbq_dmabuf * hbqbp)541 lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp)
542 {
543 dma_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys);
544 kfree(hbqbp);
545 return;
546 }
547
548 /**
549 * lpfc_sli4_rb_alloc - Allocate an SLI4 Receive buffer
550 * @phba: HBA to allocate a receive buffer for
551 *
552 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
553 * pool along a non-DMA-mapped container for it.
554 *
555 * Notes: Not interrupt-safe. Must be called with no locks held.
556 *
557 * Returns:
558 * pointer to HBQ on success
559 * NULL on failure
560 **/
561 struct hbq_dmabuf *
lpfc_sli4_rb_alloc(struct lpfc_hba * phba)562 lpfc_sli4_rb_alloc(struct lpfc_hba *phba)
563 {
564 struct hbq_dmabuf *dma_buf;
565
566 dma_buf = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
567 if (!dma_buf)
568 return NULL;
569
570 dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
571 &dma_buf->hbuf.phys);
572 if (!dma_buf->hbuf.virt) {
573 kfree(dma_buf);
574 return NULL;
575 }
576 dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL,
577 &dma_buf->dbuf.phys);
578 if (!dma_buf->dbuf.virt) {
579 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
580 dma_buf->hbuf.phys);
581 kfree(dma_buf);
582 return NULL;
583 }
584 dma_buf->total_size = LPFC_DATA_BUF_SIZE;
585 return dma_buf;
586 }
587
588 /**
589 * lpfc_sli4_rb_free - Frees a receive buffer
590 * @phba: HBA buffer was allocated for
591 * @dmab: DMA Buffer container returned by lpfc_sli4_hbq_alloc
592 *
593 * Description: Frees both the container and the DMA-mapped buffers returned by
594 * lpfc_sli4_rb_alloc.
595 *
596 * Notes: Can be called with or without locks held.
597 *
598 * Returns: None
599 **/
600 void
lpfc_sli4_rb_free(struct lpfc_hba * phba,struct hbq_dmabuf * dmab)601 lpfc_sli4_rb_free(struct lpfc_hba *phba, struct hbq_dmabuf *dmab)
602 {
603 dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
604 dma_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys);
605 kfree(dmab);
606 }
607
608 /**
609 * lpfc_sli4_nvmet_alloc - Allocate an SLI4 Receive buffer
610 * @phba: HBA to allocate a receive buffer for
611 *
612 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
613 * pool along a non-DMA-mapped container for it.
614 *
615 * Returns:
616 * pointer to HBQ on success
617 * NULL on failure
618 **/
619 struct rqb_dmabuf *
lpfc_sli4_nvmet_alloc(struct lpfc_hba * phba)620 lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
621 {
622 struct rqb_dmabuf *dma_buf;
623
624 dma_buf = kzalloc(sizeof(*dma_buf), GFP_KERNEL);
625 if (!dma_buf)
626 return NULL;
627
628 dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
629 &dma_buf->hbuf.phys);
630 if (!dma_buf->hbuf.virt) {
631 kfree(dma_buf);
632 return NULL;
633 }
634 dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_nvmet_drb_pool,
635 GFP_KERNEL, &dma_buf->dbuf.phys);
636 if (!dma_buf->dbuf.virt) {
637 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
638 dma_buf->hbuf.phys);
639 kfree(dma_buf);
640 return NULL;
641 }
642 dma_buf->total_size = LPFC_NVMET_DATA_BUF_SIZE;
643 return dma_buf;
644 }
645
646 /**
647 * lpfc_sli4_nvmet_free - Frees a receive buffer
648 * @phba: HBA buffer was allocated for
649 * @dmab: DMA Buffer container returned by lpfc_sli4_rbq_alloc
650 *
651 * Description: Frees both the container and the DMA-mapped buffers returned by
652 * lpfc_sli4_nvmet_alloc.
653 *
654 * Notes: Can be called with or without locks held.
655 *
656 * Returns: None
657 **/
658 void
lpfc_sli4_nvmet_free(struct lpfc_hba * phba,struct rqb_dmabuf * dmab)659 lpfc_sli4_nvmet_free(struct lpfc_hba *phba, struct rqb_dmabuf *dmab)
660 {
661 dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
662 dma_pool_free(phba->lpfc_nvmet_drb_pool,
663 dmab->dbuf.virt, dmab->dbuf.phys);
664 kfree(dmab);
665 }
666
667 /**
668 * lpfc_in_buf_free - Free a DMA buffer
669 * @phba: HBA buffer is associated with
670 * @mp: Buffer to free
671 *
672 * Description: Frees the given DMA buffer in the appropriate way given if the
673 * HBA is running in SLI3 mode with HBQs enabled.
674 *
675 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
676 *
677 * Returns: None
678 **/
679 void
lpfc_in_buf_free(struct lpfc_hba * phba,struct lpfc_dmabuf * mp)680 lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
681 {
682 struct hbq_dmabuf *hbq_entry;
683 unsigned long flags;
684
685 if (!mp)
686 return;
687
688 if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
689 hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf);
690 /* Check whether HBQ is still in use */
691 spin_lock_irqsave(&phba->hbalock, flags);
692 if (!phba->hbq_in_use) {
693 spin_unlock_irqrestore(&phba->hbalock, flags);
694 return;
695 }
696 list_del(&hbq_entry->dbuf.list);
697 if (hbq_entry->tag == -1) {
698 (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
699 (phba, hbq_entry);
700 } else {
701 lpfc_sli_free_hbq(phba, hbq_entry);
702 }
703 spin_unlock_irqrestore(&phba->hbalock, flags);
704 } else {
705 lpfc_mbuf_free(phba, mp->virt, mp->phys);
706 kfree(mp);
707 }
708 return;
709 }
710
711 /**
712 * lpfc_rq_buf_free - Free a RQ DMA buffer
713 * @phba: HBA buffer is associated with
714 * @mp: Buffer to free
715 *
716 * Description: Frees the given DMA buffer in the appropriate way given by
717 * reposting it to its associated RQ so it can be reused.
718 *
719 * Notes: Takes phba->hbalock. Can be called with or without other locks held.
720 *
721 * Returns: None
722 **/
723 void
lpfc_rq_buf_free(struct lpfc_hba * phba,struct lpfc_dmabuf * mp)724 lpfc_rq_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
725 {
726 struct lpfc_rqb *rqbp;
727 struct lpfc_rqe hrqe;
728 struct lpfc_rqe drqe;
729 struct rqb_dmabuf *rqb_entry;
730 unsigned long flags;
731 int rc;
732
733 if (!mp)
734 return;
735
736 rqb_entry = container_of(mp, struct rqb_dmabuf, hbuf);
737 rqbp = rqb_entry->hrq->rqbp;
738
739 spin_lock_irqsave(&phba->hbalock, flags);
740 list_del(&rqb_entry->hbuf.list);
741 hrqe.address_lo = putPaddrLow(rqb_entry->hbuf.phys);
742 hrqe.address_hi = putPaddrHigh(rqb_entry->hbuf.phys);
743 drqe.address_lo = putPaddrLow(rqb_entry->dbuf.phys);
744 drqe.address_hi = putPaddrHigh(rqb_entry->dbuf.phys);
745 rc = lpfc_sli4_rq_put(rqb_entry->hrq, rqb_entry->drq, &hrqe, &drqe);
746 if (rc < 0) {
747 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
748 "6409 Cannot post to HRQ %d: %x %x %x "
749 "DRQ %x %x\n",
750 rqb_entry->hrq->queue_id,
751 rqb_entry->hrq->host_index,
752 rqb_entry->hrq->hba_index,
753 rqb_entry->hrq->entry_count,
754 rqb_entry->drq->host_index,
755 rqb_entry->drq->hba_index);
756 (rqbp->rqb_free_buffer)(phba, rqb_entry);
757 } else {
758 list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list);
759 rqbp->buffer_count++;
760 }
761
762 spin_unlock_irqrestore(&phba->hbalock, flags);
763 }
764