xref: /openbmc/linux/drivers/scsi/lpfc/lpfc_mem.c (revision 1775c208)
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