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 50 int 51 lpfc_mem_alloc_active_rrq_pool_s4(struct lpfc_hba *phba) { 52 size_t bytes; 53 int max_xri = phba->sli4_hba.max_cfg_param.max_xri; 54 55 if (max_xri <= 0) 56 return -ENOMEM; 57 bytes = ((BITS_PER_LONG - 1 + max_xri) / BITS_PER_LONG) * 58 sizeof(unsigned long); 59 phba->cfg_rrq_xri_bitmap_sz = bytes; 60 phba->active_rrq_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, 61 bytes); 62 if (!phba->active_rrq_pool) 63 return -ENOMEM; 64 else 65 return 0; 66 } 67 68 /** 69 * lpfc_mem_alloc - create and allocate all PCI and memory pools 70 * @phba: HBA to allocate pools for 71 * @align: alignment requirement for blocks; must be a power of two 72 * 73 * Description: Creates and allocates PCI pools lpfc_mbuf_pool, 74 * lpfc_hrb_pool. Creates and allocates kmalloc-backed mempools 75 * for LPFC_MBOXQ_t and lpfc_nodelist. Also allocates the VPI bitmask. 76 * 77 * Notes: Not interrupt-safe. Must be called with no locks held. If any 78 * allocation fails, frees all successfully allocated memory before returning. 79 * 80 * Returns: 81 * 0 on success 82 * -ENOMEM on failure (if any memory allocations fail) 83 **/ 84 int 85 lpfc_mem_alloc(struct lpfc_hba *phba, int align) 86 { 87 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 88 int i; 89 90 91 phba->lpfc_mbuf_pool = dma_pool_create("lpfc_mbuf_pool", &phba->pcidev->dev, 92 LPFC_BPL_SIZE, 93 align, 0); 94 if (!phba->lpfc_mbuf_pool) 95 goto fail; 96 97 pool->elements = kmalloc_array(LPFC_MBUF_POOL_SIZE, 98 sizeof(struct lpfc_dmabuf), 99 GFP_KERNEL); 100 if (!pool->elements) 101 goto fail_free_lpfc_mbuf_pool; 102 103 pool->max_count = 0; 104 pool->current_count = 0; 105 for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) { 106 pool->elements[i].virt = dma_pool_alloc(phba->lpfc_mbuf_pool, 107 GFP_KERNEL, &pool->elements[i].phys); 108 if (!pool->elements[i].virt) 109 goto fail_free_mbuf_pool; 110 pool->max_count++; 111 pool->current_count++; 112 } 113 114 phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, 115 sizeof(LPFC_MBOXQ_t)); 116 if (!phba->mbox_mem_pool) 117 goto fail_free_mbuf_pool; 118 119 phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE, 120 sizeof(struct lpfc_nodelist)); 121 if (!phba->nlp_mem_pool) 122 goto fail_free_mbox_pool; 123 124 if (phba->sli_rev == LPFC_SLI_REV4) { 125 phba->rrq_pool = 126 mempool_create_kmalloc_pool(LPFC_RRQ_POOL_SIZE, 127 sizeof(struct lpfc_node_rrq)); 128 if (!phba->rrq_pool) 129 goto fail_free_nlp_mem_pool; 130 phba->lpfc_hrb_pool = dma_pool_create("lpfc_hrb_pool", 131 &phba->pcidev->dev, 132 LPFC_HDR_BUF_SIZE, align, 0); 133 if (!phba->lpfc_hrb_pool) 134 goto fail_free_rrq_mem_pool; 135 136 phba->lpfc_drb_pool = dma_pool_create("lpfc_drb_pool", 137 &phba->pcidev->dev, 138 LPFC_DATA_BUF_SIZE, align, 0); 139 if (!phba->lpfc_drb_pool) 140 goto fail_free_hrb_pool; 141 phba->lpfc_hbq_pool = NULL; 142 } else { 143 phba->lpfc_hbq_pool = dma_pool_create("lpfc_hbq_pool", 144 &phba->pcidev->dev, LPFC_BPL_SIZE, align, 0); 145 if (!phba->lpfc_hbq_pool) 146 goto fail_free_nlp_mem_pool; 147 phba->lpfc_hrb_pool = NULL; 148 phba->lpfc_drb_pool = NULL; 149 } 150 151 if (phba->cfg_EnableXLane) { 152 phba->device_data_mem_pool = mempool_create_kmalloc_pool( 153 LPFC_DEVICE_DATA_POOL_SIZE, 154 sizeof(struct lpfc_device_data)); 155 if (!phba->device_data_mem_pool) 156 goto fail_free_drb_pool; 157 } else { 158 phba->device_data_mem_pool = NULL; 159 } 160 161 return 0; 162 fail_free_drb_pool: 163 dma_pool_destroy(phba->lpfc_drb_pool); 164 phba->lpfc_drb_pool = NULL; 165 fail_free_hrb_pool: 166 dma_pool_destroy(phba->lpfc_hrb_pool); 167 phba->lpfc_hrb_pool = NULL; 168 fail_free_rrq_mem_pool: 169 mempool_destroy(phba->rrq_pool); 170 phba->rrq_pool = NULL; 171 fail_free_nlp_mem_pool: 172 mempool_destroy(phba->nlp_mem_pool); 173 phba->nlp_mem_pool = NULL; 174 fail_free_mbox_pool: 175 mempool_destroy(phba->mbox_mem_pool); 176 phba->mbox_mem_pool = NULL; 177 fail_free_mbuf_pool: 178 while (i--) 179 dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, 180 pool->elements[i].phys); 181 kfree(pool->elements); 182 fail_free_lpfc_mbuf_pool: 183 dma_pool_destroy(phba->lpfc_mbuf_pool); 184 phba->lpfc_mbuf_pool = NULL; 185 fail: 186 return -ENOMEM; 187 } 188 189 int 190 lpfc_nvmet_mem_alloc(struct lpfc_hba *phba) 191 { 192 phba->lpfc_nvmet_drb_pool = 193 dma_pool_create("lpfc_nvmet_drb_pool", 194 &phba->pcidev->dev, LPFC_NVMET_DATA_BUF_SIZE, 195 SGL_ALIGN_SZ, 0); 196 if (!phba->lpfc_nvmet_drb_pool) { 197 lpfc_printf_log(phba, KERN_ERR, LOG_INIT, 198 "6024 Can't enable NVME Target - no memory\n"); 199 return -ENOMEM; 200 } 201 return 0; 202 } 203 204 /** 205 * lpfc_mem_free - Frees memory allocated by lpfc_mem_alloc 206 * @phba: HBA to free memory for 207 * 208 * Description: Free the memory allocated by lpfc_mem_alloc routine. This 209 * routine is a the counterpart of lpfc_mem_alloc. 210 * 211 * Returns: None 212 **/ 213 void 214 lpfc_mem_free(struct lpfc_hba *phba) 215 { 216 int i; 217 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 218 struct lpfc_device_data *device_data; 219 220 /* Free HBQ pools */ 221 lpfc_sli_hbqbuf_free_all(phba); 222 dma_pool_destroy(phba->lpfc_nvmet_drb_pool); 223 phba->lpfc_nvmet_drb_pool = NULL; 224 225 dma_pool_destroy(phba->lpfc_drb_pool); 226 phba->lpfc_drb_pool = NULL; 227 228 dma_pool_destroy(phba->lpfc_hrb_pool); 229 phba->lpfc_hrb_pool = NULL; 230 231 dma_pool_destroy(phba->lpfc_hbq_pool); 232 phba->lpfc_hbq_pool = NULL; 233 234 mempool_destroy(phba->rrq_pool); 235 phba->rrq_pool = NULL; 236 237 /* Free NLP memory pool */ 238 mempool_destroy(phba->nlp_mem_pool); 239 phba->nlp_mem_pool = NULL; 240 if (phba->sli_rev == LPFC_SLI_REV4 && phba->active_rrq_pool) { 241 mempool_destroy(phba->active_rrq_pool); 242 phba->active_rrq_pool = NULL; 243 } 244 245 /* Free mbox memory pool */ 246 mempool_destroy(phba->mbox_mem_pool); 247 phba->mbox_mem_pool = NULL; 248 249 /* Free MBUF memory pool */ 250 for (i = 0; i < pool->current_count; i++) 251 dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt, 252 pool->elements[i].phys); 253 kfree(pool->elements); 254 255 dma_pool_destroy(phba->lpfc_mbuf_pool); 256 phba->lpfc_mbuf_pool = NULL; 257 258 /* Free Device Data memory pool */ 259 if (phba->device_data_mem_pool) { 260 /* Ensure all objects have been returned to the pool */ 261 while (!list_empty(&phba->luns)) { 262 device_data = list_first_entry(&phba->luns, 263 struct lpfc_device_data, 264 listentry); 265 list_del(&device_data->listentry); 266 mempool_free(device_data, phba->device_data_mem_pool); 267 } 268 mempool_destroy(phba->device_data_mem_pool); 269 } 270 phba->device_data_mem_pool = NULL; 271 return; 272 } 273 274 /** 275 * lpfc_mem_free_all - Frees all PCI and driver memory 276 * @phba: HBA to free memory for 277 * 278 * Description: Free memory from PCI and driver memory pools and also those 279 * used : lpfc_sg_dma_buf_pool, lpfc_mbuf_pool, lpfc_hrb_pool. Frees 280 * kmalloc-backed mempools for LPFC_MBOXQ_t and lpfc_nodelist. Also frees 281 * the VPI bitmask. 282 * 283 * Returns: None 284 **/ 285 void 286 lpfc_mem_free_all(struct lpfc_hba *phba) 287 { 288 struct lpfc_sli *psli = &phba->sli; 289 LPFC_MBOXQ_t *mbox, *next_mbox; 290 struct lpfc_dmabuf *mp; 291 292 /* Free memory used in mailbox queue back to mailbox memory pool */ 293 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) { 294 mp = (struct lpfc_dmabuf *)(mbox->ctx_buf); 295 if (mp) { 296 lpfc_mbuf_free(phba, mp->virt, mp->phys); 297 kfree(mp); 298 } 299 list_del(&mbox->list); 300 mempool_free(mbox, phba->mbox_mem_pool); 301 } 302 /* Free memory used in mailbox cmpl list back to mailbox memory pool */ 303 list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq_cmpl, list) { 304 mp = (struct lpfc_dmabuf *)(mbox->ctx_buf); 305 if (mp) { 306 lpfc_mbuf_free(phba, mp->virt, mp->phys); 307 kfree(mp); 308 } 309 list_del(&mbox->list); 310 mempool_free(mbox, phba->mbox_mem_pool); 311 } 312 /* Free the active mailbox command back to the mailbox memory pool */ 313 spin_lock_irq(&phba->hbalock); 314 psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE; 315 spin_unlock_irq(&phba->hbalock); 316 if (psli->mbox_active) { 317 mbox = psli->mbox_active; 318 mp = (struct lpfc_dmabuf *)(mbox->ctx_buf); 319 if (mp) { 320 lpfc_mbuf_free(phba, mp->virt, mp->phys); 321 kfree(mp); 322 } 323 mempool_free(mbox, phba->mbox_mem_pool); 324 psli->mbox_active = NULL; 325 } 326 327 /* Free and destroy all the allocated memory pools */ 328 lpfc_mem_free(phba); 329 330 /* Free DMA buffer memory pool */ 331 dma_pool_destroy(phba->lpfc_sg_dma_buf_pool); 332 phba->lpfc_sg_dma_buf_pool = NULL; 333 334 dma_pool_destroy(phba->lpfc_cmd_rsp_buf_pool); 335 phba->lpfc_cmd_rsp_buf_pool = NULL; 336 337 /* Free the iocb lookup array */ 338 kfree(psli->iocbq_lookup); 339 psli->iocbq_lookup = NULL; 340 341 return; 342 } 343 344 /** 345 * lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool 346 * @phba: HBA which owns the pool to allocate from 347 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation 348 * @handle: used to return the DMA-mapped address of the mbuf 349 * 350 * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool. 351 * Allocates from generic dma_pool_alloc function first and if that fails and 352 * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the 353 * HBA's pool. 354 * 355 * Notes: Not interrupt-safe. Must be called with no locks held. Takes 356 * phba->hbalock. 357 * 358 * Returns: 359 * pointer to the allocated mbuf on success 360 * NULL on failure 361 **/ 362 void * 363 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle) 364 { 365 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 366 unsigned long iflags; 367 void *ret; 368 369 ret = dma_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle); 370 371 spin_lock_irqsave(&phba->hbalock, iflags); 372 if (!ret && (mem_flags & MEM_PRI) && pool->current_count) { 373 pool->current_count--; 374 ret = pool->elements[pool->current_count].virt; 375 *handle = pool->elements[pool->current_count].phys; 376 } 377 spin_unlock_irqrestore(&phba->hbalock, iflags); 378 return ret; 379 } 380 381 /** 382 * __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked) 383 * @phba: HBA which owns the pool to return to 384 * @virt: mbuf to free 385 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed 386 * 387 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if 388 * it is below its max_count, frees the mbuf otherwise. 389 * 390 * Notes: Must be called with phba->hbalock held to synchronize access to 391 * lpfc_mbuf_safety_pool. 392 * 393 * Returns: None 394 **/ 395 void 396 __lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma) 397 { 398 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 399 400 if (pool->current_count < pool->max_count) { 401 pool->elements[pool->current_count].virt = virt; 402 pool->elements[pool->current_count].phys = dma; 403 pool->current_count++; 404 } else { 405 dma_pool_free(phba->lpfc_mbuf_pool, virt, dma); 406 } 407 return; 408 } 409 410 /** 411 * lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked) 412 * @phba: HBA which owns the pool to return to 413 * @virt: mbuf to free 414 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed 415 * 416 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if 417 * it is below its max_count, frees the mbuf otherwise. 418 * 419 * Notes: Takes phba->hbalock. Can be called with or without other locks held. 420 * 421 * Returns: None 422 **/ 423 void 424 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma) 425 { 426 unsigned long iflags; 427 428 spin_lock_irqsave(&phba->hbalock, iflags); 429 __lpfc_mbuf_free(phba, virt, dma); 430 spin_unlock_irqrestore(&phba->hbalock, iflags); 431 return; 432 } 433 434 /** 435 * lpfc_nvmet_buf_alloc - Allocate an nvmet_buf from the 436 * lpfc_sg_dma_buf_pool PCI pool 437 * @phba: HBA which owns the pool to allocate from 438 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation 439 * @handle: used to return the DMA-mapped address of the nvmet_buf 440 * 441 * Description: Allocates a DMA-mapped buffer from the lpfc_sg_dma_buf_pool 442 * PCI pool. Allocates from generic dma_pool_alloc function. 443 * 444 * Returns: 445 * pointer to the allocated nvmet_buf on success 446 * NULL on failure 447 **/ 448 void * 449 lpfc_nvmet_buf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle) 450 { 451 void *ret; 452 453 ret = dma_pool_alloc(phba->lpfc_sg_dma_buf_pool, GFP_KERNEL, handle); 454 return ret; 455 } 456 457 /** 458 * lpfc_nvmet_buf_free - Free an nvmet_buf from the lpfc_sg_dma_buf_pool 459 * PCI pool 460 * @phba: HBA which owns the pool to return to 461 * @virt: nvmet_buf to free 462 * @dma: the DMA-mapped address of the lpfc_sg_dma_buf_pool to be freed 463 * 464 * Returns: None 465 **/ 466 void 467 lpfc_nvmet_buf_free(struct lpfc_hba *phba, void *virt, dma_addr_t dma) 468 { 469 dma_pool_free(phba->lpfc_sg_dma_buf_pool, virt, dma); 470 } 471 472 /** 473 * lpfc_els_hbq_alloc - Allocate an HBQ buffer 474 * @phba: HBA to allocate HBQ buffer for 475 * 476 * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hrb_pool PCI 477 * pool along a non-DMA-mapped container for it. 478 * 479 * Notes: Not interrupt-safe. Must be called with no locks held. 480 * 481 * Returns: 482 * pointer to HBQ on success 483 * NULL on failure 484 **/ 485 struct hbq_dmabuf * 486 lpfc_els_hbq_alloc(struct lpfc_hba *phba) 487 { 488 struct hbq_dmabuf *hbqbp; 489 490 hbqbp = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL); 491 if (!hbqbp) 492 return NULL; 493 494 hbqbp->dbuf.virt = dma_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL, 495 &hbqbp->dbuf.phys); 496 if (!hbqbp->dbuf.virt) { 497 kfree(hbqbp); 498 return NULL; 499 } 500 hbqbp->total_size = LPFC_BPL_SIZE; 501 return hbqbp; 502 } 503 504 /** 505 * lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc 506 * @phba: HBA buffer was allocated for 507 * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc 508 * 509 * Description: Frees both the container and the DMA-mapped buffer returned by 510 * lpfc_els_hbq_alloc. 511 * 512 * Notes: Can be called with or without locks held. 513 * 514 * Returns: None 515 **/ 516 void 517 lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp) 518 { 519 dma_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys); 520 kfree(hbqbp); 521 return; 522 } 523 524 /** 525 * lpfc_sli4_rb_alloc - Allocate an SLI4 Receive buffer 526 * @phba: HBA to allocate a receive buffer for 527 * 528 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI 529 * pool along a non-DMA-mapped container for it. 530 * 531 * Notes: Not interrupt-safe. Must be called with no locks held. 532 * 533 * Returns: 534 * pointer to HBQ on success 535 * NULL on failure 536 **/ 537 struct hbq_dmabuf * 538 lpfc_sli4_rb_alloc(struct lpfc_hba *phba) 539 { 540 struct hbq_dmabuf *dma_buf; 541 542 dma_buf = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL); 543 if (!dma_buf) 544 return NULL; 545 546 dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL, 547 &dma_buf->hbuf.phys); 548 if (!dma_buf->hbuf.virt) { 549 kfree(dma_buf); 550 return NULL; 551 } 552 dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL, 553 &dma_buf->dbuf.phys); 554 if (!dma_buf->dbuf.virt) { 555 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt, 556 dma_buf->hbuf.phys); 557 kfree(dma_buf); 558 return NULL; 559 } 560 dma_buf->total_size = LPFC_DATA_BUF_SIZE; 561 return dma_buf; 562 } 563 564 /** 565 * lpfc_sli4_rb_free - Frees a receive buffer 566 * @phba: HBA buffer was allocated for 567 * @dmab: DMA Buffer container returned by lpfc_sli4_hbq_alloc 568 * 569 * Description: Frees both the container and the DMA-mapped buffers returned by 570 * lpfc_sli4_rb_alloc. 571 * 572 * Notes: Can be called with or without locks held. 573 * 574 * Returns: None 575 **/ 576 void 577 lpfc_sli4_rb_free(struct lpfc_hba *phba, struct hbq_dmabuf *dmab) 578 { 579 dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys); 580 dma_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys); 581 kfree(dmab); 582 } 583 584 /** 585 * lpfc_sli4_nvmet_alloc - Allocate an SLI4 Receive buffer 586 * @phba: HBA to allocate a receive buffer for 587 * 588 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI 589 * pool along a non-DMA-mapped container for it. 590 * 591 * Notes: Not interrupt-safe. Must be called with no locks held. 592 * 593 * Returns: 594 * pointer to HBQ on success 595 * NULL on failure 596 **/ 597 struct rqb_dmabuf * 598 lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba) 599 { 600 struct rqb_dmabuf *dma_buf; 601 602 dma_buf = kzalloc(sizeof(struct rqb_dmabuf), GFP_KERNEL); 603 if (!dma_buf) 604 return NULL; 605 606 dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL, 607 &dma_buf->hbuf.phys); 608 if (!dma_buf->hbuf.virt) { 609 kfree(dma_buf); 610 return NULL; 611 } 612 dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_nvmet_drb_pool, 613 GFP_KERNEL, &dma_buf->dbuf.phys); 614 if (!dma_buf->dbuf.virt) { 615 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt, 616 dma_buf->hbuf.phys); 617 kfree(dma_buf); 618 return NULL; 619 } 620 dma_buf->total_size = LPFC_NVMET_DATA_BUF_SIZE; 621 return dma_buf; 622 } 623 624 /** 625 * lpfc_sli4_nvmet_free - Frees a receive buffer 626 * @phba: HBA buffer was allocated for 627 * @dmab: DMA Buffer container returned by lpfc_sli4_rbq_alloc 628 * 629 * Description: Frees both the container and the DMA-mapped buffers returned by 630 * lpfc_sli4_nvmet_alloc. 631 * 632 * Notes: Can be called with or without locks held. 633 * 634 * Returns: None 635 **/ 636 void 637 lpfc_sli4_nvmet_free(struct lpfc_hba *phba, struct rqb_dmabuf *dmab) 638 { 639 dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys); 640 dma_pool_free(phba->lpfc_nvmet_drb_pool, 641 dmab->dbuf.virt, dmab->dbuf.phys); 642 kfree(dmab); 643 } 644 645 /** 646 * lpfc_in_buf_free - Free a DMA buffer 647 * @phba: HBA buffer is associated with 648 * @mp: Buffer to free 649 * 650 * Description: Frees the given DMA buffer in the appropriate way given if the 651 * HBA is running in SLI3 mode with HBQs enabled. 652 * 653 * Notes: Takes phba->hbalock. Can be called with or without other locks held. 654 * 655 * Returns: None 656 **/ 657 void 658 lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp) 659 { 660 struct hbq_dmabuf *hbq_entry; 661 unsigned long flags; 662 663 if (!mp) 664 return; 665 666 if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) { 667 hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf); 668 /* Check whether HBQ is still in use */ 669 spin_lock_irqsave(&phba->hbalock, flags); 670 if (!phba->hbq_in_use) { 671 spin_unlock_irqrestore(&phba->hbalock, flags); 672 return; 673 } 674 list_del(&hbq_entry->dbuf.list); 675 if (hbq_entry->tag == -1) { 676 (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer) 677 (phba, hbq_entry); 678 } else { 679 lpfc_sli_free_hbq(phba, hbq_entry); 680 } 681 spin_unlock_irqrestore(&phba->hbalock, flags); 682 } else { 683 lpfc_mbuf_free(phba, mp->virt, mp->phys); 684 kfree(mp); 685 } 686 return; 687 } 688 689 /** 690 * lpfc_rq_buf_free - Free a RQ DMA buffer 691 * @phba: HBA buffer is associated with 692 * @mp: Buffer to free 693 * 694 * Description: Frees the given DMA buffer in the appropriate way given by 695 * reposting it to its associated RQ so it can be reused. 696 * 697 * Notes: Takes phba->hbalock. Can be called with or without other locks held. 698 * 699 * Returns: None 700 **/ 701 void 702 lpfc_rq_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp) 703 { 704 struct lpfc_rqb *rqbp; 705 struct lpfc_rqe hrqe; 706 struct lpfc_rqe drqe; 707 struct rqb_dmabuf *rqb_entry; 708 unsigned long flags; 709 int rc; 710 711 if (!mp) 712 return; 713 714 rqb_entry = container_of(mp, struct rqb_dmabuf, hbuf); 715 rqbp = rqb_entry->hrq->rqbp; 716 717 spin_lock_irqsave(&phba->hbalock, flags); 718 list_del(&rqb_entry->hbuf.list); 719 hrqe.address_lo = putPaddrLow(rqb_entry->hbuf.phys); 720 hrqe.address_hi = putPaddrHigh(rqb_entry->hbuf.phys); 721 drqe.address_lo = putPaddrLow(rqb_entry->dbuf.phys); 722 drqe.address_hi = putPaddrHigh(rqb_entry->dbuf.phys); 723 rc = lpfc_sli4_rq_put(rqb_entry->hrq, rqb_entry->drq, &hrqe, &drqe); 724 if (rc < 0) { 725 (rqbp->rqb_free_buffer)(phba, rqb_entry); 726 lpfc_printf_log(phba, KERN_ERR, LOG_INIT, 727 "6409 Cannot post to HRQ %d: %x %x %x " 728 "DRQ %x %x\n", 729 rqb_entry->hrq->queue_id, 730 rqb_entry->hrq->host_index, 731 rqb_entry->hrq->hba_index, 732 rqb_entry->hrq->entry_count, 733 rqb_entry->drq->host_index, 734 rqb_entry->drq->hba_index); 735 } else { 736 list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list); 737 rqbp->buffer_count++; 738 } 739 740 spin_unlock_irqrestore(&phba->hbalock, flags); 741 } 742