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dea3101e | 1 | /******************************************************************* |
2 | * This file is part of the Emulex Linux Device Driver for * | |
c44ce173 | 3 | * Fibre Channel Host Bus Adapters. * |
21a688cd | 4 | * Copyright (C) 2004-2012 Emulex. All rights reserved. * |
c44ce173 | 5 | * EMULEX and SLI are trademarks of Emulex. * |
dea3101e | 6 | * www.emulex.com * |
c44ce173 | 7 | * Portions Copyright (C) 2004-2005 Christoph Hellwig * |
dea3101e | 8 | * * |
9 | * This program is free software; you can redistribute it and/or * | |
c44ce173 JSEC |
10 | * modify it under the terms of version 2 of the GNU General * |
11 | * Public License as published by the Free Software Foundation. * | |
12 | * This program is distributed in the hope that it will be useful. * | |
13 | * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * | |
14 | * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * | |
15 | * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * | |
16 | * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * | |
17 | * TO BE LEGALLY INVALID. See the GNU General Public License for * | |
18 | * more details, a copy of which can be found in the file COPYING * | |
19 | * included with this package. * | |
dea3101e | 20 | *******************************************************************/ |
21 | ||
dea3101e | 22 | #include <linux/mempool.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
dea3101e | 24 | #include <linux/pci.h> |
25 | #include <linux/interrupt.h> | |
26 | ||
f888ba3c JSEC |
27 | #include <scsi/scsi_device.h> |
28 | #include <scsi/scsi_transport_fc.h> | |
29 | ||
91886523 JSEC |
30 | #include <scsi/scsi.h> |
31 | ||
da0436e9 | 32 | #include "lpfc_hw4.h" |
dea3101e | 33 | #include "lpfc_hw.h" |
34 | #include "lpfc_sli.h" | |
da0436e9 | 35 | #include "lpfc_sli4.h" |
ea2151b4 | 36 | #include "lpfc_nl.h" |
dea3101e | 37 | #include "lpfc_disc.h" |
38 | #include "lpfc_scsi.h" | |
39 | #include "lpfc.h" | |
40 | #include "lpfc_crtn.h" | |
41 | ||
42 | #define LPFC_MBUF_POOL_SIZE 64 /* max elements in MBUF safety pool */ | |
43 | #define LPFC_MEM_POOL_SIZE 64 /* max elem in non-DMA safety pool */ | |
44 | ||
2e0fef85 | 45 | |
e59058c4 | 46 | /** |
3621a710 | 47 | * lpfc_mem_alloc - create and allocate all PCI and memory pools |
e59058c4 JS |
48 | * @phba: HBA to allocate pools for |
49 | * | |
50 | * Description: Creates and allocates PCI pools lpfc_scsi_dma_buf_pool, | |
da0436e9 | 51 | * lpfc_mbuf_pool, lpfc_hrb_pool. Creates and allocates kmalloc-backed mempools |
e59058c4 JS |
52 | * for LPFC_MBOXQ_t and lpfc_nodelist. Also allocates the VPI bitmask. |
53 | * | |
54 | * Notes: Not interrupt-safe. Must be called with no locks held. If any | |
55 | * allocation fails, frees all successfully allocated memory before returning. | |
56 | * | |
57 | * Returns: | |
58 | * 0 on success | |
59 | * -ENOMEM on failure (if any memory allocations fail) | |
60 | **/ | |
dea3101e | 61 | int |
da0436e9 | 62 | lpfc_mem_alloc(struct lpfc_hba *phba, int align) |
dea3101e | 63 | { |
64 | struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; | |
65 | int i; | |
66 | ||
96f7077f JS |
67 | if (phba->sli_rev == LPFC_SLI_REV4) { |
68 | /* Calculate alignment */ | |
69 | if (phba->cfg_sg_dma_buf_size < SLI4_PAGE_SIZE) | |
70 | i = phba->cfg_sg_dma_buf_size; | |
71 | else | |
72 | i = SLI4_PAGE_SIZE; | |
73 | ||
da0436e9 JS |
74 | phba->lpfc_scsi_dma_buf_pool = |
75 | pci_pool_create("lpfc_scsi_dma_buf_pool", | |
76 | phba->pcidev, | |
77 | phba->cfg_sg_dma_buf_size, | |
96f7077f | 78 | i, |
da0436e9 | 79 | 0); |
96f7077f | 80 | } else { |
da0436e9 JS |
81 | phba->lpfc_scsi_dma_buf_pool = |
82 | pci_pool_create("lpfc_scsi_dma_buf_pool", | |
83 | phba->pcidev, phba->cfg_sg_dma_buf_size, | |
84 | align, 0); | |
96f7077f JS |
85 | } |
86 | ||
dea3101e | 87 | if (!phba->lpfc_scsi_dma_buf_pool) |
88 | goto fail; | |
89 | ||
90 | phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev, | |
da0436e9 JS |
91 | LPFC_BPL_SIZE, |
92 | align, 0); | |
dea3101e | 93 | if (!phba->lpfc_mbuf_pool) |
94 | goto fail_free_dma_buf_pool; | |
95 | ||
96 | pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) * | |
97 | LPFC_MBUF_POOL_SIZE, GFP_KERNEL); | |
a96e0c77 MK |
98 | if (!pool->elements) |
99 | goto fail_free_lpfc_mbuf_pool; | |
100 | ||
dea3101e | 101 | pool->max_count = 0; |
102 | pool->current_count = 0; | |
103 | for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) { | |
104 | pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool, | |
105 | GFP_KERNEL, &pool->elements[i].phys); | |
106 | if (!pool->elements[i].virt) | |
107 | goto fail_free_mbuf_pool; | |
108 | pool->max_count++; | |
109 | pool->current_count++; | |
110 | } | |
111 | ||
0eaae62a MD |
112 | phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, |
113 | sizeof(LPFC_MBOXQ_t)); | |
dea3101e | 114 | if (!phba->mbox_mem_pool) |
115 | goto fail_free_mbuf_pool; | |
116 | ||
0eaae62a MD |
117 | phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, |
118 | sizeof(struct lpfc_nodelist)); | |
dea3101e | 119 | if (!phba->nlp_mem_pool) |
120 | goto fail_free_mbox_pool; | |
8568a4d2 JS |
121 | |
122 | if (phba->sli_rev == LPFC_SLI_REV4) { | |
19ca7609 JS |
123 | phba->rrq_pool = |
124 | mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, | |
125 | sizeof(struct lpfc_node_rrq)); | |
126 | if (!phba->rrq_pool) | |
127 | goto fail_free_nlp_mem_pool; | |
8568a4d2 | 128 | phba->lpfc_hrb_pool = pci_pool_create("lpfc_hrb_pool", |
da0436e9 JS |
129 | phba->pcidev, |
130 | LPFC_HDR_BUF_SIZE, align, 0); | |
8568a4d2 | 131 | if (!phba->lpfc_hrb_pool) |
19ca7609 | 132 | goto fail_free_rrq_mem_pool; |
8568a4d2 JS |
133 | |
134 | phba->lpfc_drb_pool = pci_pool_create("lpfc_drb_pool", | |
da0436e9 JS |
135 | phba->pcidev, |
136 | LPFC_DATA_BUF_SIZE, align, 0); | |
8568a4d2 JS |
137 | if (!phba->lpfc_drb_pool) |
138 | goto fail_free_hrb_pool; | |
139 | phba->lpfc_hbq_pool = NULL; | |
140 | } else { | |
141 | phba->lpfc_hbq_pool = pci_pool_create("lpfc_hbq_pool", | |
142 | phba->pcidev, LPFC_BPL_SIZE, align, 0); | |
143 | if (!phba->lpfc_hbq_pool) | |
144 | goto fail_free_nlp_mem_pool; | |
145 | phba->lpfc_hrb_pool = NULL; | |
146 | phba->lpfc_drb_pool = NULL; | |
147 | } | |
92d7f7b0 | 148 | |
dea3101e | 149 | return 0; |
8568a4d2 | 150 | fail_free_hrb_pool: |
da0436e9 JS |
151 | pci_pool_destroy(phba->lpfc_hrb_pool); |
152 | phba->lpfc_hrb_pool = NULL; | |
19ca7609 JS |
153 | fail_free_rrq_mem_pool: |
154 | mempool_destroy(phba->rrq_pool); | |
155 | phba->rrq_pool = NULL; | |
ed957684 JS |
156 | fail_free_nlp_mem_pool: |
157 | mempool_destroy(phba->nlp_mem_pool); | |
158 | phba->nlp_mem_pool = NULL; | |
dea3101e | 159 | fail_free_mbox_pool: |
160 | mempool_destroy(phba->mbox_mem_pool); | |
2e0fef85 | 161 | phba->mbox_mem_pool = NULL; |
dea3101e | 162 | fail_free_mbuf_pool: |
a96e0c77 | 163 | while (i--) |
dea3101e | 164 | pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, |
165 | pool->elements[i].phys); | |
166 | kfree(pool->elements); | |
a96e0c77 | 167 | fail_free_lpfc_mbuf_pool: |
dea3101e | 168 | pci_pool_destroy(phba->lpfc_mbuf_pool); |
2e0fef85 | 169 | phba->lpfc_mbuf_pool = NULL; |
dea3101e | 170 | fail_free_dma_buf_pool: |
171 | pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool); | |
2e0fef85 | 172 | phba->lpfc_scsi_dma_buf_pool = NULL; |
dea3101e | 173 | fail: |
174 | return -ENOMEM; | |
175 | } | |
176 | ||
e59058c4 | 177 | /** |
da0436e9 | 178 | * lpfc_mem_free - Frees memory allocated by lpfc_mem_alloc |
e59058c4 JS |
179 | * @phba: HBA to free memory for |
180 | * | |
da0436e9 JS |
181 | * Description: Free the memory allocated by lpfc_mem_alloc routine. This |
182 | * routine is a the counterpart of lpfc_mem_alloc. | |
e59058c4 JS |
183 | * |
184 | * Returns: None | |
185 | **/ | |
dea3101e | 186 | void |
da0436e9 | 187 | lpfc_mem_free(struct lpfc_hba *phba) |
dea3101e | 188 | { |
dea3101e | 189 | int i; |
da0436e9 | 190 | struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; |
dea3101e | 191 | |
da0436e9 | 192 | /* Free HBQ pools */ |
ed957684 | 193 | lpfc_sli_hbqbuf_free_all(phba); |
8568a4d2 JS |
194 | if (phba->lpfc_drb_pool) |
195 | pci_pool_destroy(phba->lpfc_drb_pool); | |
da0436e9 | 196 | phba->lpfc_drb_pool = NULL; |
8568a4d2 JS |
197 | if (phba->lpfc_hrb_pool) |
198 | pci_pool_destroy(phba->lpfc_hrb_pool); | |
da0436e9 JS |
199 | phba->lpfc_hrb_pool = NULL; |
200 | ||
8568a4d2 JS |
201 | if (phba->lpfc_hbq_pool) |
202 | pci_pool_destroy(phba->lpfc_hbq_pool); | |
203 | phba->lpfc_hbq_pool = NULL; | |
204 | ||
21a688cd JS |
205 | if (phba->rrq_pool) |
206 | mempool_destroy(phba->rrq_pool); | |
207 | phba->rrq_pool = NULL; | |
208 | ||
da0436e9 JS |
209 | /* Free NLP memory pool */ |
210 | mempool_destroy(phba->nlp_mem_pool); | |
211 | phba->nlp_mem_pool = NULL; | |
212 | ||
213 | /* Free mbox memory pool */ | |
214 | mempool_destroy(phba->mbox_mem_pool); | |
215 | phba->mbox_mem_pool = NULL; | |
216 | ||
217 | /* Free MBUF memory pool */ | |
218 | for (i = 0; i < pool->current_count; i++) | |
219 | pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, | |
220 | pool->elements[i].phys); | |
221 | kfree(pool->elements); | |
222 | ||
223 | pci_pool_destroy(phba->lpfc_mbuf_pool); | |
224 | phba->lpfc_mbuf_pool = NULL; | |
ed957684 | 225 | |
da0436e9 JS |
226 | /* Free DMA buffer memory pool */ |
227 | pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool); | |
228 | phba->lpfc_scsi_dma_buf_pool = NULL; | |
229 | ||
230 | return; | |
231 | } | |
232 | ||
233 | /** | |
234 | * lpfc_mem_free_all - Frees all PCI and driver memory | |
235 | * @phba: HBA to free memory for | |
236 | * | |
237 | * Description: Free memory from PCI and driver memory pools and also those | |
238 | * used : lpfc_scsi_dma_buf_pool, lpfc_mbuf_pool, lpfc_hrb_pool. Frees | |
239 | * kmalloc-backed mempools for LPFC_MBOXQ_t and lpfc_nodelist. Also frees | |
240 | * the VPI bitmask. | |
241 | * | |
242 | * Returns: None | |
243 | **/ | |
244 | void | |
245 | lpfc_mem_free_all(struct lpfc_hba *phba) | |
246 | { | |
247 | struct lpfc_sli *psli = &phba->sli; | |
248 | LPFC_MBOXQ_t *mbox, *next_mbox; | |
249 | struct lpfc_dmabuf *mp; | |
250 | ||
251 | /* Free memory used in mailbox queue back to mailbox memory pool */ | |
dea3101e | 252 | list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) { |
253 | mp = (struct lpfc_dmabuf *) (mbox->context1); | |
254 | if (mp) { | |
255 | lpfc_mbuf_free(phba, mp->virt, mp->phys); | |
256 | kfree(mp); | |
257 | } | |
258 | list_del(&mbox->list); | |
259 | mempool_free(mbox, phba->mbox_mem_pool); | |
260 | } | |
da0436e9 | 261 | /* Free memory used in mailbox cmpl list back to mailbox memory pool */ |
92d7f7b0 JS |
262 | list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq_cmpl, list) { |
263 | mp = (struct lpfc_dmabuf *) (mbox->context1); | |
264 | if (mp) { | |
265 | lpfc_mbuf_free(phba, mp->virt, mp->phys); | |
266 | kfree(mp); | |
267 | } | |
268 | list_del(&mbox->list); | |
269 | mempool_free(mbox, phba->mbox_mem_pool); | |
270 | } | |
da0436e9 JS |
271 | /* Free the active mailbox command back to the mailbox memory pool */ |
272 | spin_lock_irq(&phba->hbalock); | |
dea3101e | 273 | psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; |
da0436e9 | 274 | spin_unlock_irq(&phba->hbalock); |
dea3101e | 275 | if (psli->mbox_active) { |
276 | mbox = psli->mbox_active; | |
277 | mp = (struct lpfc_dmabuf *) (mbox->context1); | |
278 | if (mp) { | |
279 | lpfc_mbuf_free(phba, mp->virt, mp->phys); | |
280 | kfree(mp); | |
281 | } | |
282 | mempool_free(mbox, phba->mbox_mem_pool); | |
283 | psli->mbox_active = NULL; | |
284 | } | |
285 | ||
da0436e9 JS |
286 | /* Free and destroy all the allocated memory pools */ |
287 | lpfc_mem_free(phba); | |
2e0fef85 | 288 | |
e59058c4 | 289 | /* Free the iocb lookup array */ |
9f49d3b0 JS |
290 | kfree(psli->iocbq_lookup); |
291 | psli->iocbq_lookup = NULL; | |
da0436e9 JS |
292 | |
293 | return; | |
dea3101e | 294 | } |
295 | ||
e59058c4 | 296 | /** |
3621a710 | 297 | * lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool |
e59058c4 JS |
298 | * @phba: HBA which owns the pool to allocate from |
299 | * @mem_flags: indicates if this is a priority (MEM_PRI) allocation | |
300 | * @handle: used to return the DMA-mapped address of the mbuf | |
301 | * | |
302 | * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool. | |
303 | * Allocates from generic pci_pool_alloc function first and if that fails and | |
304 | * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the | |
305 | * HBA's pool. | |
306 | * | |
307 | * Notes: Not interrupt-safe. Must be called with no locks held. Takes | |
308 | * phba->hbalock. | |
309 | * | |
310 | * Returns: | |
311 | * pointer to the allocated mbuf on success | |
312 | * NULL on failure | |
313 | **/ | |
dea3101e | 314 | void * |
315 | lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle) | |
316 | { | |
317 | struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; | |
2e0fef85 | 318 | unsigned long iflags; |
dea3101e | 319 | void *ret; |
320 | ||
321 | ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle); | |
322 | ||
2e0fef85 | 323 | spin_lock_irqsave(&phba->hbalock, iflags); |
92d7f7b0 | 324 | if (!ret && (mem_flags & MEM_PRI) && pool->current_count) { |
dea3101e | 325 | pool->current_count--; |
326 | ret = pool->elements[pool->current_count].virt; | |
327 | *handle = pool->elements[pool->current_count].phys; | |
328 | } | |
2e0fef85 | 329 | spin_unlock_irqrestore(&phba->hbalock, iflags); |
dea3101e | 330 | return ret; |
331 | } | |
332 | ||
e59058c4 | 333 | /** |
3621a710 | 334 | * __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked) |
e59058c4 JS |
335 | * @phba: HBA which owns the pool to return to |
336 | * @virt: mbuf to free | |
337 | * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed | |
338 | * | |
339 | * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if | |
340 | * it is below its max_count, frees the mbuf otherwise. | |
341 | * | |
342 | * Notes: Must be called with phba->hbalock held to synchronize access to | |
343 | * lpfc_mbuf_safety_pool. | |
344 | * | |
345 | * Returns: None | |
346 | **/ | |
dea3101e | 347 | void |
2e0fef85 | 348 | __lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma) |
dea3101e | 349 | { |
350 | struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; | |
351 | ||
352 | if (pool->current_count < pool->max_count) { | |
353 | pool->elements[pool->current_count].virt = virt; | |
354 | pool->elements[pool->current_count].phys = dma; | |
355 | pool->current_count++; | |
356 | } else { | |
357 | pci_pool_free(phba->lpfc_mbuf_pool, virt, dma); | |
358 | } | |
359 | return; | |
360 | } | |
2e0fef85 | 361 | |
e59058c4 | 362 | /** |
3621a710 | 363 | * lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked) |
e59058c4 JS |
364 | * @phba: HBA which owns the pool to return to |
365 | * @virt: mbuf to free | |
366 | * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed | |
367 | * | |
368 | * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if | |
369 | * it is below its max_count, frees the mbuf otherwise. | |
370 | * | |
371 | * Notes: Takes phba->hbalock. Can be called with or without other locks held. | |
372 | * | |
373 | * Returns: None | |
374 | **/ | |
2e0fef85 JS |
375 | void |
376 | lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma) | |
377 | { | |
378 | unsigned long iflags; | |
379 | ||
380 | spin_lock_irqsave(&phba->hbalock, iflags); | |
381 | __lpfc_mbuf_free(phba, virt, dma); | |
382 | spin_unlock_irqrestore(&phba->hbalock, iflags); | |
383 | return; | |
384 | } | |
ed957684 | 385 | |
e59058c4 | 386 | /** |
3621a710 | 387 | * lpfc_els_hbq_alloc - Allocate an HBQ buffer |
e59058c4 JS |
388 | * @phba: HBA to allocate HBQ buffer for |
389 | * | |
da0436e9 | 390 | * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hrb_pool PCI |
e59058c4 JS |
391 | * pool along a non-DMA-mapped container for it. |
392 | * | |
393 | * Notes: Not interrupt-safe. Must be called with no locks held. | |
394 | * | |
395 | * Returns: | |
396 | * pointer to HBQ on success | |
397 | * NULL on failure | |
398 | **/ | |
51ef4c26 JS |
399 | struct hbq_dmabuf * |
400 | lpfc_els_hbq_alloc(struct lpfc_hba *phba) | |
ed957684 | 401 | { |
51ef4c26 JS |
402 | struct hbq_dmabuf *hbqbp; |
403 | ||
2e90f4b5 | 404 | hbqbp = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL); |
51ef4c26 JS |
405 | if (!hbqbp) |
406 | return NULL; | |
407 | ||
8568a4d2 | 408 | hbqbp->dbuf.virt = pci_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL, |
51ef4c26 JS |
409 | &hbqbp->dbuf.phys); |
410 | if (!hbqbp->dbuf.virt) { | |
411 | kfree(hbqbp); | |
412 | return NULL; | |
413 | } | |
414 | hbqbp->size = LPFC_BPL_SIZE; | |
415 | return hbqbp; | |
ed957684 JS |
416 | } |
417 | ||
e59058c4 | 418 | /** |
da0436e9 | 419 | * lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc |
e59058c4 JS |
420 | * @phba: HBA buffer was allocated for |
421 | * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc | |
422 | * | |
423 | * Description: Frees both the container and the DMA-mapped buffer returned by | |
424 | * lpfc_els_hbq_alloc. | |
425 | * | |
426 | * Notes: Can be called with or without locks held. | |
427 | * | |
428 | * Returns: None | |
429 | **/ | |
ed957684 | 430 | void |
51ef4c26 | 431 | lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp) |
ed957684 | 432 | { |
8568a4d2 | 433 | pci_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys); |
51ef4c26 | 434 | kfree(hbqbp); |
ed957684 JS |
435 | return; |
436 | } | |
437 | ||
da0436e9 JS |
438 | /** |
439 | * lpfc_sli4_rb_alloc - Allocate an SLI4 Receive buffer | |
440 | * @phba: HBA to allocate a receive buffer for | |
441 | * | |
442 | * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI | |
443 | * pool along a non-DMA-mapped container for it. | |
444 | * | |
445 | * Notes: Not interrupt-safe. Must be called with no locks held. | |
446 | * | |
447 | * Returns: | |
448 | * pointer to HBQ on success | |
449 | * NULL on failure | |
450 | **/ | |
451 | struct hbq_dmabuf * | |
452 | lpfc_sli4_rb_alloc(struct lpfc_hba *phba) | |
453 | { | |
454 | struct hbq_dmabuf *dma_buf; | |
455 | ||
2e90f4b5 | 456 | dma_buf = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL); |
da0436e9 JS |
457 | if (!dma_buf) |
458 | return NULL; | |
459 | ||
460 | dma_buf->hbuf.virt = pci_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL, | |
461 | &dma_buf->hbuf.phys); | |
462 | if (!dma_buf->hbuf.virt) { | |
463 | kfree(dma_buf); | |
464 | return NULL; | |
465 | } | |
466 | dma_buf->dbuf.virt = pci_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL, | |
467 | &dma_buf->dbuf.phys); | |
468 | if (!dma_buf->dbuf.virt) { | |
469 | pci_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt, | |
470 | dma_buf->hbuf.phys); | |
471 | kfree(dma_buf); | |
472 | return NULL; | |
473 | } | |
474 | dma_buf->size = LPFC_BPL_SIZE; | |
475 | return dma_buf; | |
476 | } | |
477 | ||
478 | /** | |
479 | * lpfc_sli4_rb_free - Frees a receive buffer | |
480 | * @phba: HBA buffer was allocated for | |
481 | * @dmab: DMA Buffer container returned by lpfc_sli4_hbq_alloc | |
482 | * | |
483 | * Description: Frees both the container and the DMA-mapped buffers returned by | |
484 | * lpfc_sli4_rb_alloc. | |
485 | * | |
486 | * Notes: Can be called with or without locks held. | |
487 | * | |
488 | * Returns: None | |
489 | **/ | |
490 | void | |
491 | lpfc_sli4_rb_free(struct lpfc_hba *phba, struct hbq_dmabuf *dmab) | |
492 | { | |
493 | pci_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys); | |
494 | pci_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys); | |
495 | kfree(dmab); | |
496 | return; | |
497 | } | |
498 | ||
e59058c4 | 499 | /** |
3621a710 | 500 | * lpfc_in_buf_free - Free a DMA buffer |
e59058c4 JS |
501 | * @phba: HBA buffer is associated with |
502 | * @mp: Buffer to free | |
503 | * | |
504 | * Description: Frees the given DMA buffer in the appropriate way given if the | |
505 | * HBA is running in SLI3 mode with HBQs enabled. | |
506 | * | |
507 | * Notes: Takes phba->hbalock. Can be called with or without other locks held. | |
508 | * | |
509 | * Returns: None | |
510 | **/ | |
92d7f7b0 JS |
511 | void |
512 | lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp) | |
513 | { | |
514 | struct hbq_dmabuf *hbq_entry; | |
3163f725 | 515 | unsigned long flags; |
92d7f7b0 | 516 | |
7f5f3d0d JS |
517 | if (!mp) |
518 | return; | |
519 | ||
92d7f7b0 | 520 | if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) { |
3163f725 JS |
521 | /* Check whether HBQ is still in use */ |
522 | spin_lock_irqsave(&phba->hbalock, flags); | |
523 | if (!phba->hbq_in_use) { | |
524 | spin_unlock_irqrestore(&phba->hbalock, flags); | |
525 | return; | |
526 | } | |
92d7f7b0 | 527 | hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf); |
3163f725 | 528 | list_del(&hbq_entry->dbuf.list); |
92d7f7b0 | 529 | if (hbq_entry->tag == -1) { |
51ef4c26 JS |
530 | (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer) |
531 | (phba, hbq_entry); | |
92d7f7b0 JS |
532 | } else { |
533 | lpfc_sli_free_hbq(phba, hbq_entry); | |
534 | } | |
3163f725 | 535 | spin_unlock_irqrestore(&phba->hbalock, flags); |
92d7f7b0 JS |
536 | } else { |
537 | lpfc_mbuf_free(phba, mp->virt, mp->phys); | |
538 | kfree(mp); | |
539 | } | |
540 | return; | |
541 | } |