1/******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2017-2018 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 51int 52lpfc_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 **/ 85int 86lpfc_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; 163fail_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 190int 191lpfc_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 **/ 214void 215lpfc_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 **/ 286void 287lpfc_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 the iocb lookup array */ 339 kfree(psli->iocbq_lookup); 340 psli->iocbq_lookup = NULL; 341 342 return; 343} 344 345/** 346 * lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool 347 * @phba: HBA which owns the pool to allocate from 348 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation 349 * @handle: used to return the DMA-mapped address of the mbuf 350 * 351 * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool. 352 * Allocates from generic dma_pool_alloc function first and if that fails and 353 * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the 354 * HBA's pool. 355 * 356 * Notes: Not interrupt-safe. Must be called with no locks held. Takes 357 * phba->hbalock. 358 * 359 * Returns: 360 * pointer to the allocated mbuf on success 361 * NULL on failure 362 **/ 363void * 364lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle) 365{ 366 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 367 unsigned long iflags; 368 void *ret; 369 370 ret = dma_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle); 371 372 spin_lock_irqsave(&phba->hbalock, iflags); 373 if (!ret && (mem_flags & MEM_PRI) && pool->current_count) { 374 pool->current_count--; 375 ret = pool->elements[pool->current_count].virt; 376 *handle = pool->elements[pool->current_count].phys; 377 } 378 spin_unlock_irqrestore(&phba->hbalock, iflags); 379 return ret; 380} 381 382/** 383 * __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked) 384 * @phba: HBA which owns the pool to return to 385 * @virt: mbuf to free 386 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed 387 * 388 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if 389 * it is below its max_count, frees the mbuf otherwise. 390 * 391 * Notes: Must be called with phba->hbalock held to synchronize access to 392 * lpfc_mbuf_safety_pool. 393 * 394 * Returns: None 395 **/ 396void 397__lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma) 398{ 399 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 400 401 if (pool->current_count < pool->max_count) { 402 pool->elements[pool->current_count].virt = virt; 403 pool->elements[pool->current_count].phys = dma; 404 pool->current_count++; 405 } else { 406 dma_pool_free(phba->lpfc_mbuf_pool, virt, dma); 407 } 408 return; 409} 410 411/** 412 * lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked) 413 * @phba: HBA which owns the pool to return to 414 * @virt: mbuf to free 415 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed 416 * 417 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if 418 * it is below its max_count, frees the mbuf otherwise. 419 * 420 * Notes: Takes phba->hbalock. Can be called with or without other locks held. 421 * 422 * Returns: None 423 **/ 424void 425lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma) 426{ 427 unsigned long iflags; 428 429 spin_lock_irqsave(&phba->hbalock, iflags); 430 __lpfc_mbuf_free(phba, virt, dma); 431 spin_unlock_irqrestore(&phba->hbalock, iflags); 432 return; 433} 434 435/** 436 * lpfc_nvmet_buf_alloc - Allocate an nvmet_buf from the 437 * lpfc_sg_dma_buf_pool PCI pool 438 * @phba: HBA which owns the pool to allocate from 439 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation 440 * @handle: used to return the DMA-mapped address of the nvmet_buf 441 * 442 * Description: Allocates a DMA-mapped buffer from the lpfc_sg_dma_buf_pool 443 * PCI pool. Allocates from generic dma_pool_alloc function. 444 * 445 * Returns: 446 * pointer to the allocated nvmet_buf on success 447 * NULL on failure 448 **/ 449void * 450lpfc_nvmet_buf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle) 451{ 452 void *ret; 453 454 ret = dma_pool_alloc(phba->lpfc_sg_dma_buf_pool, GFP_KERNEL, handle); 455 return ret; 456} 457 458/** 459 * lpfc_nvmet_buf_free - Free an nvmet_buf from the lpfc_sg_dma_buf_pool 460 * PCI pool 461 * @phba: HBA which owns the pool to return to 462 * @virt: nvmet_buf to free 463 * @dma: the DMA-mapped address of the lpfc_sg_dma_buf_pool to be freed 464 * 465 * Returns: None 466 **/ 467void 468lpfc_nvmet_buf_free(struct lpfc_hba *phba, void *virt, dma_addr_t dma) 469{ 470 dma_pool_free(phba->lpfc_sg_dma_buf_pool, virt, dma); 471} 472 473/** 474 * lpfc_els_hbq_alloc - Allocate an HBQ buffer 475 * @phba: HBA to allocate HBQ buffer for 476 * 477 * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hrb_pool PCI 478 * pool along a non-DMA-mapped container for it. 479 * 480 * Notes: Not interrupt-safe. Must be called with no locks held. 481 * 482 * Returns: 483 * pointer to HBQ on success 484 * NULL on failure 485 **/ 486struct hbq_dmabuf * 487lpfc_els_hbq_alloc(struct lpfc_hba *phba) 488{ 489 struct hbq_dmabuf *hbqbp; 490 491 hbqbp = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL); 492 if (!hbqbp) 493 return NULL; 494 495 hbqbp->dbuf.virt = dma_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL, 496 &hbqbp->dbuf.phys); 497 if (!hbqbp->dbuf.virt) { 498 kfree(hbqbp); 499 return NULL; 500 } 501 hbqbp->total_size = LPFC_BPL_SIZE; 502 return hbqbp; 503} 504 505/** 506 * lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc 507 * @phba: HBA buffer was allocated for 508 * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc 509 * 510 * Description: Frees both the container and the DMA-mapped buffer returned by 511 * lpfc_els_hbq_alloc. 512 * 513 * Notes: Can be called with or without locks held. 514 * 515 * Returns: None 516 **/ 517void 518lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp) 519{ 520 dma_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys); 521 kfree(hbqbp); 522 return; 523} 524 525/** 526 * lpfc_sli4_rb_alloc - Allocate an SLI4 Receive buffer 527 * @phba: HBA to allocate a receive buffer for 528 * 529 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI 530 * pool along a non-DMA-mapped container for it. 531 * 532 * Notes: Not interrupt-safe. Must be called with no locks held. 533 * 534 * Returns: 535 * pointer to HBQ on success 536 * NULL on failure 537 **/ 538struct hbq_dmabuf * 539lpfc_sli4_rb_alloc(struct lpfc_hba *phba) 540{ 541 struct hbq_dmabuf *dma_buf; 542 543 dma_buf = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL); 544 if (!dma_buf) 545 return NULL; 546 547 dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL, 548 &dma_buf->hbuf.phys); 549 if (!dma_buf->hbuf.virt) { 550 kfree(dma_buf); 551 return NULL; 552 } 553 dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL, 554 &dma_buf->dbuf.phys); 555 if (!dma_buf->dbuf.virt) { 556 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt, 557 dma_buf->hbuf.phys); 558 kfree(dma_buf); 559 return NULL; 560 } 561 dma_buf->total_size = LPFC_DATA_BUF_SIZE; 562 return dma_buf; 563} 564 565/** 566 * lpfc_sli4_rb_free - Frees a receive buffer 567 * @phba: HBA buffer was allocated for 568 * @dmab: DMA Buffer container returned by lpfc_sli4_hbq_alloc 569 * 570 * Description: Frees both the container and the DMA-mapped buffers returned by 571 * lpfc_sli4_rb_alloc. 572 * 573 * Notes: Can be called with or without locks held. 574 * 575 * Returns: None 576 **/ 577void 578lpfc_sli4_rb_free(struct lpfc_hba *phba, struct hbq_dmabuf *dmab) 579{ 580 dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys); 581 dma_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys); 582 kfree(dmab); 583} 584 585/** 586 * lpfc_sli4_nvmet_alloc - Allocate an SLI4 Receive buffer 587 * @phba: HBA to allocate a receive buffer for 588 * 589 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI 590 * pool along a non-DMA-mapped container for it. 591 * 592 * Returns: 593 * pointer to HBQ on success 594 * NULL on failure 595 **/ 596struct rqb_dmabuf * 597lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba) 598{ 599 struct rqb_dmabuf *dma_buf; 600 601 dma_buf = kzalloc(sizeof(*dma_buf), GFP_KERNEL); 602 if (!dma_buf) 603 return NULL; 604 605 dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL, 606 &dma_buf->hbuf.phys); 607 if (!dma_buf->hbuf.virt) { 608 kfree(dma_buf); 609 return NULL; 610 } 611 dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_nvmet_drb_pool, 612 GFP_KERNEL, &dma_buf->dbuf.phys); 613 if (!dma_buf->dbuf.virt) { 614 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt, 615 dma_buf->hbuf.phys); 616 kfree(dma_buf); 617 return NULL; 618 } 619 dma_buf->total_size = LPFC_NVMET_DATA_BUF_SIZE; 620 return dma_buf; 621} 622 623/** 624 * lpfc_sli4_nvmet_free - Frees a receive buffer 625 * @phba: HBA buffer was allocated for 626 * @dmab: DMA Buffer container returned by lpfc_sli4_rbq_alloc 627 * 628 * Description: Frees both the container and the DMA-mapped buffers returned by 629 * lpfc_sli4_nvmet_alloc. 630 * 631 * Notes: Can be called with or without locks held. 632 * 633 * Returns: None 634 **/ 635void 636lpfc_sli4_nvmet_free(struct lpfc_hba *phba, struct rqb_dmabuf *dmab) 637{ 638 dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys); 639 dma_pool_free(phba->lpfc_nvmet_drb_pool, 640 dmab->dbuf.virt, dmab->dbuf.phys); 641 kfree(dmab); 642} 643 644/** 645 * lpfc_in_buf_free - Free a DMA buffer 646 * @phba: HBA buffer is associated with 647 * @mp: Buffer to free 648 * 649 * Description: Frees the given DMA buffer in the appropriate way given if the 650 * HBA is running in SLI3 mode with HBQs enabled. 651 * 652 * Notes: Takes phba->hbalock. Can be called with or without other locks held. 653 * 654 * Returns: None 655 **/ 656void 657lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp) 658{ 659 struct hbq_dmabuf *hbq_entry; 660 unsigned long flags; 661 662 if (!mp) 663 return; 664 665 if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) { 666 hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf); 667 /* Check whether HBQ is still in use */ 668 spin_lock_irqsave(&phba->hbalock, flags); 669 if (!phba->hbq_in_use) { 670 spin_unlock_irqrestore(&phba->hbalock, flags); 671 return; 672 } 673 list_del(&hbq_entry->dbuf.list); 674 if (hbq_entry->tag == -1) { 675 (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer) 676 (phba, hbq_entry); 677 } else { 678 lpfc_sli_free_hbq(phba, hbq_entry); 679 } 680 spin_unlock_irqrestore(&phba->hbalock, flags); 681 } else { 682 lpfc_mbuf_free(phba, mp->virt, mp->phys); 683 kfree(mp); 684 } 685 return; 686} 687 688/** 689 * lpfc_rq_buf_free - Free a RQ DMA buffer 690 * @phba: HBA buffer is associated with 691 * @mp: Buffer to free 692 * 693 * Description: Frees the given DMA buffer in the appropriate way given by 694 * reposting it to its associated RQ so it can be reused. 695 * 696 * Notes: Takes phba->hbalock. Can be called with or without other locks held. 697 * 698 * Returns: None 699 **/ 700void 701lpfc_rq_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp) 702{ 703 struct lpfc_rqb *rqbp; 704 struct lpfc_rqe hrqe; 705 struct lpfc_rqe drqe; 706 struct rqb_dmabuf *rqb_entry; 707 unsigned long flags; 708 int rc; 709 710 if (!mp) 711 return; 712 713 rqb_entry = container_of(mp, struct rqb_dmabuf, hbuf); 714 rqbp = rqb_entry->hrq->rqbp; 715 716 spin_lock_irqsave(&phba->hbalock, flags); 717 list_del(&rqb_entry->hbuf.list); 718 hrqe.address_lo = putPaddrLow(rqb_entry->hbuf.phys); 719 hrqe.address_hi = putPaddrHigh(rqb_entry->hbuf.phys); 720 drqe.address_lo = putPaddrLow(rqb_entry->dbuf.phys); 721 drqe.address_hi = putPaddrHigh(rqb_entry->dbuf.phys); 722 rc = lpfc_sli4_rq_put(rqb_entry->hrq, rqb_entry->drq, &hrqe, &drqe); 723 if (rc < 0) { 724 lpfc_printf_log(phba, KERN_ERR, LOG_INIT, 725 "6409 Cannot post to HRQ %d: %x %x %x " 726 "DRQ %x %x\n", 727 rqb_entry->hrq->queue_id, 728 rqb_entry->hrq->host_index, 729 rqb_entry->hrq->hba_index, 730 rqb_entry->hrq->entry_count, 731 rqb_entry->drq->host_index, 732 rqb_entry->drq->hba_index); 733 (rqbp->rqb_free_buffer)(phba, rqb_entry); 734 } else { 735 list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list); 736 rqbp->buffer_count++; 737 } 738 739 spin_unlock_irqrestore(&phba->hbalock, flags); 740} 741