1 /******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2004-2012 Emulex. All rights reserved. * 5 * EMULEX and SLI are trademarks of Emulex. * 6 * www.emulex.com * 7 * Portions Copyright (C) 2004-2005 Christoph Hellwig * 8 * * 9 * This program is free software; you can redistribute it and/or * 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. * 20 *******************************************************************/ 21 22 #include <linux/mempool.h> 23 #include <linux/slab.h> 24 #include <linux/pci.h> 25 #include <linux/interrupt.h> 26 27 #include <scsi/scsi_device.h> 28 #include <scsi/scsi_transport_fc.h> 29 30 #include <scsi/scsi.h> 31 32 #include "lpfc_hw4.h" 33 #include "lpfc_hw.h" 34 #include "lpfc_sli.h" 35 #include "lpfc_sli4.h" 36 #include "lpfc_nl.h" 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 45 46 /** 47 * lpfc_mem_alloc - create and allocate all PCI and memory pools 48 * @phba: HBA to allocate pools for 49 * 50 * Description: Creates and allocates PCI pools lpfc_scsi_dma_buf_pool, 51 * lpfc_mbuf_pool, lpfc_hrb_pool. Creates and allocates kmalloc-backed mempools 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 **/ 61 int 62 lpfc_mem_alloc(struct lpfc_hba *phba, int align) 63 { 64 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 65 int i; 66 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 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, 78 i, 79 0); 80 } else { 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); 85 } 86 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, 91 LPFC_BPL_SIZE, 92 align, 0); 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); 98 if (!pool->elements) 99 goto fail_free_lpfc_mbuf_pool; 100 101 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 } 111 112 phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, 113 sizeof(LPFC_MBOXQ_t)); 114 if (!phba->mbox_mem_pool) 115 goto fail_free_mbuf_pool; 116 117 phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, 118 sizeof(struct lpfc_nodelist)); 119 if (!phba->nlp_mem_pool) 120 goto fail_free_mbox_pool; 121 122 if (phba->sli_rev == LPFC_SLI_REV4) { 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; 128 phba->lpfc_hrb_pool = pci_pool_create("lpfc_hrb_pool", 129 phba->pcidev, 130 LPFC_HDR_BUF_SIZE, align, 0); 131 if (!phba->lpfc_hrb_pool) 132 goto fail_free_rrq_mem_pool; 133 134 phba->lpfc_drb_pool = pci_pool_create("lpfc_drb_pool", 135 phba->pcidev, 136 LPFC_DATA_BUF_SIZE, align, 0); 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 } 148 149 return 0; 150 fail_free_hrb_pool: 151 pci_pool_destroy(phba->lpfc_hrb_pool); 152 phba->lpfc_hrb_pool = NULL; 153 fail_free_rrq_mem_pool: 154 mempool_destroy(phba->rrq_pool); 155 phba->rrq_pool = NULL; 156 fail_free_nlp_mem_pool: 157 mempool_destroy(phba->nlp_mem_pool); 158 phba->nlp_mem_pool = NULL; 159 fail_free_mbox_pool: 160 mempool_destroy(phba->mbox_mem_pool); 161 phba->mbox_mem_pool = NULL; 162 fail_free_mbuf_pool: 163 while (i--) 164 pci_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, 165 pool->elements[i].phys); 166 kfree(pool->elements); 167 fail_free_lpfc_mbuf_pool: 168 pci_pool_destroy(phba->lpfc_mbuf_pool); 169 phba->lpfc_mbuf_pool = NULL; 170 fail_free_dma_buf_pool: 171 pci_pool_destroy(phba->lpfc_scsi_dma_buf_pool); 172 phba->lpfc_scsi_dma_buf_pool = NULL; 173 fail: 174 return -ENOMEM; 175 } 176 177 /** 178 * lpfc_mem_free - Frees memory allocated by lpfc_mem_alloc 179 * @phba: HBA to free memory for 180 * 181 * Description: Free the memory allocated by lpfc_mem_alloc routine. This 182 * routine is a the counterpart of lpfc_mem_alloc. 183 * 184 * Returns: None 185 **/ 186 void 187 lpfc_mem_free(struct lpfc_hba *phba) 188 { 189 int i; 190 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 191 192 /* Free HBQ pools */ 193 lpfc_sli_hbqbuf_free_all(phba); 194 if (phba->lpfc_drb_pool) 195 pci_pool_destroy(phba->lpfc_drb_pool); 196 phba->lpfc_drb_pool = NULL; 197 if (phba->lpfc_hrb_pool) 198 pci_pool_destroy(phba->lpfc_hrb_pool); 199 phba->lpfc_hrb_pool = NULL; 200 201 if (phba->lpfc_hbq_pool) 202 pci_pool_destroy(phba->lpfc_hbq_pool); 203 phba->lpfc_hbq_pool = NULL; 204 205 if (phba->rrq_pool) 206 mempool_destroy(phba->rrq_pool); 207 phba->rrq_pool = NULL; 208 209 /* 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; 225 226 /* 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 */ 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 } 261 /* Free memory used in mailbox cmpl list back to mailbox memory pool */ 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 } 271 /* Free the active mailbox command back to the mailbox memory pool */ 272 spin_lock_irq(&phba->hbalock); 273 psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; 274 spin_unlock_irq(&phba->hbalock); 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 } 285 286 /* Free and destroy all the allocated memory pools */ 287 lpfc_mem_free(phba); 288 289 /* Free the iocb lookup array */ 290 kfree(psli->iocbq_lookup); 291 psli->iocbq_lookup = NULL; 292 293 return; 294 } 295 296 /** 297 * lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool 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 **/ 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; 318 unsigned long iflags; 319 void *ret; 320 321 ret = pci_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle); 322 323 spin_lock_irqsave(&phba->hbalock, iflags); 324 if (!ret && (mem_flags & MEM_PRI) && pool->current_count) { 325 pool->current_count--; 326 ret = pool->elements[pool->current_count].virt; 327 *handle = pool->elements[pool->current_count].phys; 328 } 329 spin_unlock_irqrestore(&phba->hbalock, iflags); 330 return ret; 331 } 332 333 /** 334 * __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked) 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 **/ 347 void 348 __lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma) 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 } 361 362 /** 363 * lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked) 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 **/ 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 } 385 386 /** 387 * lpfc_els_hbq_alloc - Allocate an HBQ buffer 388 * @phba: HBA to allocate HBQ buffer for 389 * 390 * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hrb_pool PCI 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 **/ 399 struct hbq_dmabuf * 400 lpfc_els_hbq_alloc(struct lpfc_hba *phba) 401 { 402 struct hbq_dmabuf *hbqbp; 403 404 hbqbp = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL); 405 if (!hbqbp) 406 return NULL; 407 408 hbqbp->dbuf.virt = pci_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL, 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; 416 } 417 418 /** 419 * lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc 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 **/ 430 void 431 lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp) 432 { 433 pci_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys); 434 kfree(hbqbp); 435 return; 436 } 437 438 /** 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; 455 456 dma_buf = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL); 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 } 498 499 /** 500 * lpfc_in_buf_free - Free a DMA buffer 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 **/ 511 void 512 lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp) 513 { 514 struct hbq_dmabuf *hbq_entry; 515 unsigned long flags; 516 517 if (!mp) 518 return; 519 520 if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) { 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 } 527 hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf); 528 list_del(&hbq_entry->dbuf.list); 529 if (hbq_entry->tag == -1) { 530 (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer) 531 (phba, hbq_entry); 532 } else { 533 lpfc_sli_free_hbq(phba, hbq_entry); 534 } 535 spin_unlock_irqrestore(&phba->hbalock, flags); 536 } else { 537 lpfc_mbuf_free(phba, mp->virt, mp->phys); 538 kfree(mp); 539 } 540 return; 541 } 542