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dea3101e JB |
1 | /******************************************************************* |
2 | * This file is part of the Emulex Linux Device Driver for * | |
c44ce173 | 3 | * Fibre Channel Host Bus Adapters. * |
d8e93df1 | 4 | * Copyright (C) 2004-2009 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 JB |
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 JB |
20 | *******************************************************************/ |
21 | ||
dea3101e | 22 | #include <linux/mempool.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
dea3101e JB |
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 JB |
33 | #include "lpfc_hw.h" |
34 | #include "lpfc_sli.h" | |
da0436e9 | 35 | #include "lpfc_sli4.h" |
ea2151b4 | 36 | #include "lpfc_nl.h" |
dea3101e JB |
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 JB |
63 | { |
64 | struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; | |
92d7f7b0 | 65 | int longs; |
dea3101e JB |
66 | int i; |
67 | ||
da0436e9 JS |
68 | if (phba->sli_rev == LPFC_SLI_REV4) |
69 | phba->lpfc_scsi_dma_buf_pool = | |
70 | pci_pool_create("lpfc_scsi_dma_buf_pool", | |
71 | phba->pcidev, | |
72 | phba->cfg_sg_dma_buf_size, | |
73 | phba->cfg_sg_dma_buf_size, | |
74 | 0); | |
75 | else | |
76 | phba->lpfc_scsi_dma_buf_pool = | |
77 | pci_pool_create("lpfc_scsi_dma_buf_pool", | |
78 | phba->pcidev, phba->cfg_sg_dma_buf_size, | |
79 | align, 0); | |
dea3101e JB |
80 | if (!phba->lpfc_scsi_dma_buf_pool) |
81 | goto fail; | |
82 | ||
83 | phba->lpfc_mbuf_pool = pci_pool_create("lpfc_mbuf_pool", phba->pcidev, | |
da0436e9 JS |
84 | LPFC_BPL_SIZE, |
85 | align, 0); | |
dea3101e JB |
86 | if (!phba->lpfc_mbuf_pool) |
87 | goto fail_free_dma_buf_pool; | |
88 | ||
89 | pool->elements = kmalloc(sizeof(struct lpfc_dmabuf) * | |
90 | LPFC_MBUF_POOL_SIZE, GFP_KERNEL); | |
a96e0c77 MK |
91 | if (!pool->elements) |
92 | goto fail_free_lpfc_mbuf_pool; | |
93 | ||
dea3101e JB |
94 | pool->max_count = 0; |
95 | pool->current_count = 0; | |
96 | for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) { | |
97 | pool->elements[i].virt = pci_pool_alloc(phba->lpfc_mbuf_pool, | |
98 | GFP_KERNEL, &pool->elements[i].phys); | |
99 | if (!pool->elements[i].virt) | |
100 | goto fail_free_mbuf_pool; | |
101 | pool->max_count++; | |
102 | pool->current_count++; | |
103 | } | |
104 | ||
0eaae62a MD |
105 | phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, |
106 | sizeof(LPFC_MBOXQ_t)); | |
dea3101e JB |
107 | if (!phba->mbox_mem_pool) |
108 | goto fail_free_mbuf_pool; | |
109 | ||
0eaae62a MD |
110 | phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, |
111 | sizeof(struct lpfc_nodelist)); | |
dea3101e JB |
112 | if (!phba->nlp_mem_pool) |
113 | goto fail_free_mbox_pool; | |
8568a4d2 JS |
114 | |
115 | if (phba->sli_rev == LPFC_SLI_REV4) { | |
116 | phba->lpfc_hrb_pool = pci_pool_create("lpfc_hrb_pool", | |
da0436e9 JS |
117 | phba->pcidev, |
118 | LPFC_HDR_BUF_SIZE, align, 0); | |
8568a4d2 JS |
119 | if (!phba->lpfc_hrb_pool) |
120 | goto fail_free_nlp_mem_pool; | |
121 | ||
122 | phba->lpfc_drb_pool = pci_pool_create("lpfc_drb_pool", | |
da0436e9 JS |
123 | phba->pcidev, |
124 | LPFC_DATA_BUF_SIZE, align, 0); | |
8568a4d2 JS |
125 | if (!phba->lpfc_drb_pool) |
126 | goto fail_free_hrb_pool; | |
127 | phba->lpfc_hbq_pool = NULL; | |
128 | } else { | |
129 | phba->lpfc_hbq_pool = pci_pool_create("lpfc_hbq_pool", | |
130 | phba->pcidev, LPFC_BPL_SIZE, align, 0); | |
131 | if (!phba->lpfc_hbq_pool) | |
132 | goto fail_free_nlp_mem_pool; | |
133 | phba->lpfc_hrb_pool = NULL; | |
134 | phba->lpfc_drb_pool = NULL; | |
135 | } | |
858c9f6c JS |
136 | /* vpi zero is reserved for the physical port so add 1 to max */ |
137 | longs = ((phba->max_vpi + 1) + BITS_PER_LONG - 1) / BITS_PER_LONG; | |
92d7f7b0 JS |
138 | phba->vpi_bmask = kzalloc(longs * sizeof(unsigned long), GFP_KERNEL); |
139 | if (!phba->vpi_bmask) | |
da0436e9 | 140 | goto fail_free_dbq_pool; |
92d7f7b0 | 141 | |
dea3101e JB |
142 | return 0; |
143 | ||
da0436e9 JS |
144 | fail_free_dbq_pool: |
145 | pci_pool_destroy(phba->lpfc_drb_pool); | |
146 | phba->lpfc_drb_pool = NULL; | |
8568a4d2 | 147 | fail_free_hrb_pool: |
da0436e9 JS |
148 | pci_pool_destroy(phba->lpfc_hrb_pool); |
149 | phba->lpfc_hrb_pool = NULL; | |
ed957684 JS |
150 | fail_free_nlp_mem_pool: |
151 | mempool_destroy(phba->nlp_mem_pool); | |
152 | phba->nlp_mem_pool = NULL; | |
dea3101e JB |
153 | fail_free_mbox_pool: |
154 | mempool_destroy(phba->mbox_mem_pool); | |
2e0fef85 | 155 | phba->mbox_mem_pool = NULL; |
dea3101e | 156 | fail_free_mbuf_pool: |
a96e0c77 | 157 | while (i--) |
dea3101e JB |
158 | pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, |
159 | pool->elements[i].phys); | |
160 | kfree(pool->elements); | |
a96e0c77 | 161 | fail_free_lpfc_mbuf_pool: |
dea3101e | 162 | pci_pool_destroy(phba->lpfc_mbuf_pool); |
2e0fef85 | 163 | phba->lpfc_mbuf_pool = NULL; |
dea3101e JB |
164 | fail_free_dma_buf_pool: |
165 | pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool); | |
2e0fef85 | 166 | phba->lpfc_scsi_dma_buf_pool = NULL; |
dea3101e JB |
167 | fail: |
168 | return -ENOMEM; | |
169 | } | |
170 | ||
e59058c4 | 171 | /** |
da0436e9 | 172 | * lpfc_mem_free - Frees memory allocated by lpfc_mem_alloc |
e59058c4 JS |
173 | * @phba: HBA to free memory for |
174 | * | |
da0436e9 JS |
175 | * Description: Free the memory allocated by lpfc_mem_alloc routine. This |
176 | * routine is a the counterpart of lpfc_mem_alloc. | |
e59058c4 JS |
177 | * |
178 | * Returns: None | |
179 | **/ | |
dea3101e | 180 | void |
da0436e9 | 181 | lpfc_mem_free(struct lpfc_hba *phba) |
dea3101e | 182 | { |
dea3101e | 183 | int i; |
da0436e9 | 184 | struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; |
dea3101e | 185 | |
da0436e9 | 186 | /* Free VPI bitmask memory */ |
92d7f7b0 | 187 | kfree(phba->vpi_bmask); |
da0436e9 JS |
188 | |
189 | /* Free HBQ pools */ | |
ed957684 | 190 | lpfc_sli_hbqbuf_free_all(phba); |
8568a4d2 JS |
191 | if (phba->lpfc_drb_pool) |
192 | pci_pool_destroy(phba->lpfc_drb_pool); | |
da0436e9 | 193 | phba->lpfc_drb_pool = NULL; |
8568a4d2 JS |
194 | if (phba->lpfc_hrb_pool) |
195 | pci_pool_destroy(phba->lpfc_hrb_pool); | |
da0436e9 JS |
196 | phba->lpfc_hrb_pool = NULL; |
197 | ||
8568a4d2 JS |
198 | if (phba->lpfc_hbq_pool) |
199 | pci_pool_destroy(phba->lpfc_hbq_pool); | |
200 | phba->lpfc_hbq_pool = NULL; | |
201 | ||
da0436e9 JS |
202 | /* Free NLP memory pool */ |
203 | mempool_destroy(phba->nlp_mem_pool); | |
204 | phba->nlp_mem_pool = NULL; | |
205 | ||
206 | /* Free mbox memory pool */ | |
207 | mempool_destroy(phba->mbox_mem_pool); | |
208 | phba->mbox_mem_pool = NULL; | |
209 | ||
210 | /* Free MBUF memory pool */ | |
211 | for (i = 0; i < pool->current_count; i++) | |
212 | pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, | |
213 | pool->elements[i].phys); | |
214 | kfree(pool->elements); | |
215 | ||
216 | pci_pool_destroy(phba->lpfc_mbuf_pool); | |
217 | phba->lpfc_mbuf_pool = NULL; | |
ed957684 | 218 | |
da0436e9 JS |
219 | /* Free DMA buffer memory pool */ |
220 | pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool); | |
221 | phba->lpfc_scsi_dma_buf_pool = NULL; | |
222 | ||
223 | return; | |
224 | } | |
225 | ||
226 | /** | |
227 | * lpfc_mem_free_all - Frees all PCI and driver memory | |
228 | * @phba: HBA to free memory for | |
229 | * | |
230 | * Description: Free memory from PCI and driver memory pools and also those | |
231 | * used : lpfc_scsi_dma_buf_pool, lpfc_mbuf_pool, lpfc_hrb_pool. Frees | |
232 | * kmalloc-backed mempools for LPFC_MBOXQ_t and lpfc_nodelist. Also frees | |
233 | * the VPI bitmask. | |
234 | * | |
235 | * Returns: None | |
236 | **/ | |
237 | void | |
238 | lpfc_mem_free_all(struct lpfc_hba *phba) | |
239 | { | |
240 | struct lpfc_sli *psli = &phba->sli; | |
241 | LPFC_MBOXQ_t *mbox, *next_mbox; | |
242 | struct lpfc_dmabuf *mp; | |
243 | ||
244 | /* Free memory used in mailbox queue back to mailbox memory pool */ | |
dea3101e JB |
245 | list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) { |
246 | mp = (struct lpfc_dmabuf *) (mbox->context1); | |
247 | if (mp) { | |
248 | lpfc_mbuf_free(phba, mp->virt, mp->phys); | |
249 | kfree(mp); | |
250 | } | |
251 | list_del(&mbox->list); | |
252 | mempool_free(mbox, phba->mbox_mem_pool); | |
253 | } | |
da0436e9 | 254 | /* Free memory used in mailbox cmpl list back to mailbox memory pool */ |
92d7f7b0 JS |
255 | list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq_cmpl, list) { |
256 | mp = (struct lpfc_dmabuf *) (mbox->context1); | |
257 | if (mp) { | |
258 | lpfc_mbuf_free(phba, mp->virt, mp->phys); | |
259 | kfree(mp); | |
260 | } | |
261 | list_del(&mbox->list); | |
262 | mempool_free(mbox, phba->mbox_mem_pool); | |
263 | } | |
da0436e9 JS |
264 | /* Free the active mailbox command back to the mailbox memory pool */ |
265 | spin_lock_irq(&phba->hbalock); | |
dea3101e | 266 | psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; |
da0436e9 | 267 | spin_unlock_irq(&phba->hbalock); |
dea3101e JB |
268 | if (psli->mbox_active) { |
269 | mbox = psli->mbox_active; | |
270 | mp = (struct lpfc_dmabuf *) (mbox->context1); | |
271 | if (mp) { | |
272 | lpfc_mbuf_free(phba, mp->virt, mp->phys); | |
273 | kfree(mp); | |
274 | } | |
275 | mempool_free(mbox, phba->mbox_mem_pool); | |
276 | psli->mbox_active = NULL; | |
277 | } | |
278 | ||
da0436e9 JS |
279 | /* Free and destroy all the allocated memory pools */ |
280 | lpfc_mem_free(phba); | |
2e0fef85 | 281 | |
e59058c4 | 282 | /* Free the iocb lookup array */ |
9f49d3b0 JS |
283 | kfree(psli->iocbq_lookup); |
284 | psli->iocbq_lookup = NULL; | |
da0436e9 JS |
285 | |
286 | return; | |
dea3101e JB |
287 | } |
288 | ||
e59058c4 | 289 | /** |
3621a710 | 290 | * lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool |
e59058c4 JS |
291 | * @phba: HBA which owns the pool to allocate from |
292 | * @mem_flags: indicates if this is a priority (MEM_PRI) allocation | |
293 | * @handle: used to return the DMA-mapped address of the mbuf | |
294 | * | |
295 | * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool. | |
296 | * Allocates from generic pci_pool_alloc function first and if that fails and | |
297 | * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the | |
298 | * HBA's pool. | |
299 | * | |
300 | * Notes: Not interrupt-safe. Must be called with no locks held. Takes | |
301 | * phba->hbalock. | |
302 | * | |
303 | * Returns: | |
304 | * pointer to the allocated mbuf on success | |
305 | * NULL on failure | |
306 | **/ | |
dea3101e JB |
307 | void * |
308 | lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle) | |
309 | { | |
310 | struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; | |
2e0fef85 | 311 | unsigned long iflags; |
dea3101e JB |
312 | void *ret; |
313 | ||
314 | ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle); | |
315 | ||
2e0fef85 | 316 | spin_lock_irqsave(&phba->hbalock, iflags); |
92d7f7b0 | 317 | if (!ret && (mem_flags & MEM_PRI) && pool->current_count) { |
dea3101e JB |
318 | pool->current_count--; |
319 | ret = pool->elements[pool->current_count].virt; | |
320 | *handle = pool->elements[pool->current_count].phys; | |
321 | } | |
2e0fef85 | 322 | spin_unlock_irqrestore(&phba->hbalock, iflags); |
dea3101e JB |
323 | return ret; |
324 | } | |
325 | ||
e59058c4 | 326 | /** |
3621a710 | 327 | * __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked) |
e59058c4 JS |
328 | * @phba: HBA which owns the pool to return to |
329 | * @virt: mbuf to free | |
330 | * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed | |
331 | * | |
332 | * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if | |
333 | * it is below its max_count, frees the mbuf otherwise. | |
334 | * | |
335 | * Notes: Must be called with phba->hbalock held to synchronize access to | |
336 | * lpfc_mbuf_safety_pool. | |
337 | * | |
338 | * Returns: None | |
339 | **/ | |
dea3101e | 340 | void |
2e0fef85 | 341 | __lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma) |
dea3101e JB |
342 | { |
343 | struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; | |
344 | ||
345 | if (pool->current_count < pool->max_count) { | |
346 | pool->elements[pool->current_count].virt = virt; | |
347 | pool->elements[pool->current_count].phys = dma; | |
348 | pool->current_count++; | |
349 | } else { | |
350 | pci_pool_free(phba->lpfc_mbuf_pool, virt, dma); | |
351 | } | |
352 | return; | |
353 | } | |
2e0fef85 | 354 | |
e59058c4 | 355 | /** |
3621a710 | 356 | * lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked) |
e59058c4 JS |
357 | * @phba: HBA which owns the pool to return to |
358 | * @virt: mbuf to free | |
359 | * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed | |
360 | * | |
361 | * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if | |
362 | * it is below its max_count, frees the mbuf otherwise. | |
363 | * | |
364 | * Notes: Takes phba->hbalock. Can be called with or without other locks held. | |
365 | * | |
366 | * Returns: None | |
367 | **/ | |
2e0fef85 JS |
368 | void |
369 | lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma) | |
370 | { | |
371 | unsigned long iflags; | |
372 | ||
373 | spin_lock_irqsave(&phba->hbalock, iflags); | |
374 | __lpfc_mbuf_free(phba, virt, dma); | |
375 | spin_unlock_irqrestore(&phba->hbalock, iflags); | |
376 | return; | |
377 | } | |
ed957684 | 378 | |
e59058c4 | 379 | /** |
3621a710 | 380 | * lpfc_els_hbq_alloc - Allocate an HBQ buffer |
e59058c4 JS |
381 | * @phba: HBA to allocate HBQ buffer for |
382 | * | |
da0436e9 | 383 | * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hrb_pool PCI |
e59058c4 JS |
384 | * pool along a non-DMA-mapped container for it. |
385 | * | |
386 | * Notes: Not interrupt-safe. Must be called with no locks held. | |
387 | * | |
388 | * Returns: | |
389 | * pointer to HBQ on success | |
390 | * NULL on failure | |
391 | **/ | |
51ef4c26 JS |
392 | struct hbq_dmabuf * |
393 | lpfc_els_hbq_alloc(struct lpfc_hba *phba) | |
ed957684 | 394 | { |
51ef4c26 JS |
395 | struct hbq_dmabuf *hbqbp; |
396 | ||
397 | hbqbp = kmalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL); | |
398 | if (!hbqbp) | |
399 | return NULL; | |
400 | ||
8568a4d2 | 401 | hbqbp->dbuf.virt = pci_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL, |
51ef4c26 JS |
402 | &hbqbp->dbuf.phys); |
403 | if (!hbqbp->dbuf.virt) { | |
404 | kfree(hbqbp); | |
405 | return NULL; | |
406 | } | |
407 | hbqbp->size = LPFC_BPL_SIZE; | |
408 | return hbqbp; | |
ed957684 JS |
409 | } |
410 | ||
e59058c4 | 411 | /** |
da0436e9 | 412 | * lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc |
e59058c4 JS |
413 | * @phba: HBA buffer was allocated for |
414 | * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc | |
415 | * | |
416 | * Description: Frees both the container and the DMA-mapped buffer returned by | |
417 | * lpfc_els_hbq_alloc. | |
418 | * | |
419 | * Notes: Can be called with or without locks held. | |
420 | * | |
421 | * Returns: None | |
422 | **/ | |
ed957684 | 423 | void |
51ef4c26 | 424 | lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp) |
ed957684 | 425 | { |
8568a4d2 | 426 | pci_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys); |
51ef4c26 | 427 | kfree(hbqbp); |
ed957684 JS |
428 | return; |
429 | } | |
430 | ||
da0436e9 JS |
431 | /** |
432 | * lpfc_sli4_rb_alloc - Allocate an SLI4 Receive buffer | |
433 | * @phba: HBA to allocate a receive buffer for | |
434 | * | |
435 | * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI | |
436 | * pool along a non-DMA-mapped container for it. | |
437 | * | |
438 | * Notes: Not interrupt-safe. Must be called with no locks held. | |
439 | * | |
440 | * Returns: | |
441 | * pointer to HBQ on success | |
442 | * NULL on failure | |
443 | **/ | |
444 | struct hbq_dmabuf * | |
445 | lpfc_sli4_rb_alloc(struct lpfc_hba *phba) | |
446 | { | |
447 | struct hbq_dmabuf *dma_buf; | |
448 | ||
449 | dma_buf = kmalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL); | |
450 | if (!dma_buf) | |
451 | return NULL; | |
452 | ||
453 | dma_buf->hbuf.virt = pci_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL, | |
454 | &dma_buf->hbuf.phys); | |
455 | if (!dma_buf->hbuf.virt) { | |
456 | kfree(dma_buf); | |
457 | return NULL; | |
458 | } | |
459 | dma_buf->dbuf.virt = pci_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL, | |
460 | &dma_buf->dbuf.phys); | |
461 | if (!dma_buf->dbuf.virt) { | |
462 | pci_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt, | |
463 | dma_buf->hbuf.phys); | |
464 | kfree(dma_buf); | |
465 | return NULL; | |
466 | } | |
467 | dma_buf->size = LPFC_BPL_SIZE; | |
468 | return dma_buf; | |
469 | } | |
470 | ||
471 | /** | |
472 | * lpfc_sli4_rb_free - Frees a receive buffer | |
473 | * @phba: HBA buffer was allocated for | |
474 | * @dmab: DMA Buffer container returned by lpfc_sli4_hbq_alloc | |
475 | * | |
476 | * Description: Frees both the container and the DMA-mapped buffers returned by | |
477 | * lpfc_sli4_rb_alloc. | |
478 | * | |
479 | * Notes: Can be called with or without locks held. | |
480 | * | |
481 | * Returns: None | |
482 | **/ | |
483 | void | |
484 | lpfc_sli4_rb_free(struct lpfc_hba *phba, struct hbq_dmabuf *dmab) | |
485 | { | |
486 | pci_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys); | |
487 | pci_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys); | |
488 | kfree(dmab); | |
489 | return; | |
490 | } | |
491 | ||
e59058c4 | 492 | /** |
3621a710 | 493 | * lpfc_in_buf_free - Free a DMA buffer |
e59058c4 JS |
494 | * @phba: HBA buffer is associated with |
495 | * @mp: Buffer to free | |
496 | * | |
497 | * Description: Frees the given DMA buffer in the appropriate way given if the | |
498 | * HBA is running in SLI3 mode with HBQs enabled. | |
499 | * | |
500 | * Notes: Takes phba->hbalock. Can be called with or without other locks held. | |
501 | * | |
502 | * Returns: None | |
503 | **/ | |
92d7f7b0 JS |
504 | void |
505 | lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp) | |
506 | { | |
507 | struct hbq_dmabuf *hbq_entry; | |
3163f725 | 508 | unsigned long flags; |
92d7f7b0 | 509 | |
7f5f3d0d JS |
510 | if (!mp) |
511 | return; | |
512 | ||
92d7f7b0 | 513 | if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) { |
3163f725 JS |
514 | /* Check whether HBQ is still in use */ |
515 | spin_lock_irqsave(&phba->hbalock, flags); | |
516 | if (!phba->hbq_in_use) { | |
517 | spin_unlock_irqrestore(&phba->hbalock, flags); | |
518 | return; | |
519 | } | |
92d7f7b0 | 520 | hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf); |
3163f725 | 521 | list_del(&hbq_entry->dbuf.list); |
92d7f7b0 | 522 | if (hbq_entry->tag == -1) { |
51ef4c26 JS |
523 | (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer) |
524 | (phba, hbq_entry); | |
92d7f7b0 JS |
525 | } else { |
526 | lpfc_sli_free_hbq(phba, hbq_entry); | |
527 | } | |
3163f725 | 528 | spin_unlock_irqrestore(&phba->hbalock, flags); |
92d7f7b0 JS |
529 | } else { |
530 | lpfc_mbuf_free(phba, mp->virt, mp->phys); | |
531 | kfree(mp); | |
532 | } | |
533 | return; | |
534 | } |