1 /******************************************************************* 2 * This file is part of the Emulex Linux Device Driver for * 3 * Fibre Channel Host Bus Adapters. * 4 * Copyright (C) 2017-2021 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 51 int 52 lpfc_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 **/ 85 int 86 lpfc_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; 163 fail_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 } 189 190 int 191 lpfc_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 **/ 214 void 215 lpfc_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 **/ 286 void 287 lpfc_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 Congestion Data buffer */ 339 if (phba->cgn_i) { 340 dma_free_coherent(&phba->pcidev->dev, 341 sizeof(struct lpfc_cgn_info), 342 phba->cgn_i->virt, phba->cgn_i->phys); 343 kfree(phba->cgn_i); 344 phba->cgn_i = NULL; 345 } 346 347 /* Free RX table */ 348 kfree(phba->rxtable); 349 phba->rxtable = NULL; 350 351 /* Free the iocb lookup array */ 352 kfree(psli->iocbq_lookup); 353 psli->iocbq_lookup = NULL; 354 355 return; 356 } 357 358 /** 359 * lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool 360 * @phba: HBA which owns the pool to allocate from 361 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation 362 * @handle: used to return the DMA-mapped address of the mbuf 363 * 364 * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool. 365 * Allocates from generic dma_pool_alloc function first and if that fails and 366 * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the 367 * HBA's pool. 368 * 369 * Notes: Not interrupt-safe. Must be called with no locks held. Takes 370 * phba->hbalock. 371 * 372 * Returns: 373 * pointer to the allocated mbuf on success 374 * NULL on failure 375 **/ 376 void * 377 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle) 378 { 379 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 380 unsigned long iflags; 381 void *ret; 382 383 ret = dma_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle); 384 385 spin_lock_irqsave(&phba->hbalock, iflags); 386 if (!ret && (mem_flags & MEM_PRI) && pool->current_count) { 387 pool->current_count--; 388 ret = pool->elements[pool->current_count].virt; 389 *handle = pool->elements[pool->current_count].phys; 390 } 391 spin_unlock_irqrestore(&phba->hbalock, iflags); 392 return ret; 393 } 394 395 /** 396 * __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked) 397 * @phba: HBA which owns the pool to return to 398 * @virt: mbuf to free 399 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed 400 * 401 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if 402 * it is below its max_count, frees the mbuf otherwise. 403 * 404 * Notes: Must be called with phba->hbalock held to synchronize access to 405 * lpfc_mbuf_safety_pool. 406 * 407 * Returns: None 408 **/ 409 void 410 __lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma) 411 { 412 struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool; 413 414 if (pool->current_count < pool->max_count) { 415 pool->elements[pool->current_count].virt = virt; 416 pool->elements[pool->current_count].phys = dma; 417 pool->current_count++; 418 } else { 419 dma_pool_free(phba->lpfc_mbuf_pool, virt, dma); 420 } 421 return; 422 } 423 424 /** 425 * lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked) 426 * @phba: HBA which owns the pool to return to 427 * @virt: mbuf to free 428 * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed 429 * 430 * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if 431 * it is below its max_count, frees the mbuf otherwise. 432 * 433 * Notes: Takes phba->hbalock. Can be called with or without other locks held. 434 * 435 * Returns: None 436 **/ 437 void 438 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma) 439 { 440 unsigned long iflags; 441 442 spin_lock_irqsave(&phba->hbalock, iflags); 443 __lpfc_mbuf_free(phba, virt, dma); 444 spin_unlock_irqrestore(&phba->hbalock, iflags); 445 return; 446 } 447 448 /** 449 * lpfc_nvmet_buf_alloc - Allocate an nvmet_buf from the 450 * lpfc_sg_dma_buf_pool PCI pool 451 * @phba: HBA which owns the pool to allocate from 452 * @mem_flags: indicates if this is a priority (MEM_PRI) allocation 453 * @handle: used to return the DMA-mapped address of the nvmet_buf 454 * 455 * Description: Allocates a DMA-mapped buffer from the lpfc_sg_dma_buf_pool 456 * PCI pool. Allocates from generic dma_pool_alloc function. 457 * 458 * Returns: 459 * pointer to the allocated nvmet_buf on success 460 * NULL on failure 461 **/ 462 void * 463 lpfc_nvmet_buf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle) 464 { 465 void *ret; 466 467 ret = dma_pool_alloc(phba->lpfc_sg_dma_buf_pool, GFP_KERNEL, handle); 468 return ret; 469 } 470 471 /** 472 * lpfc_nvmet_buf_free - Free an nvmet_buf from the lpfc_sg_dma_buf_pool 473 * PCI pool 474 * @phba: HBA which owns the pool to return to 475 * @virt: nvmet_buf to free 476 * @dma: the DMA-mapped address of the lpfc_sg_dma_buf_pool to be freed 477 * 478 * Returns: None 479 **/ 480 void 481 lpfc_nvmet_buf_free(struct lpfc_hba *phba, void *virt, dma_addr_t dma) 482 { 483 dma_pool_free(phba->lpfc_sg_dma_buf_pool, virt, dma); 484 } 485 486 /** 487 * lpfc_els_hbq_alloc - Allocate an HBQ buffer 488 * @phba: HBA to allocate HBQ buffer for 489 * 490 * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hrb_pool PCI 491 * pool along a non-DMA-mapped container for it. 492 * 493 * Notes: Not interrupt-safe. Must be called with no locks held. 494 * 495 * Returns: 496 * pointer to HBQ on success 497 * NULL on failure 498 **/ 499 struct hbq_dmabuf * 500 lpfc_els_hbq_alloc(struct lpfc_hba *phba) 501 { 502 struct hbq_dmabuf *hbqbp; 503 504 hbqbp = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL); 505 if (!hbqbp) 506 return NULL; 507 508 hbqbp->dbuf.virt = dma_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL, 509 &hbqbp->dbuf.phys); 510 if (!hbqbp->dbuf.virt) { 511 kfree(hbqbp); 512 return NULL; 513 } 514 hbqbp->total_size = LPFC_BPL_SIZE; 515 return hbqbp; 516 } 517 518 /** 519 * lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc 520 * @phba: HBA buffer was allocated for 521 * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc 522 * 523 * Description: Frees both the container and the DMA-mapped buffer returned by 524 * lpfc_els_hbq_alloc. 525 * 526 * Notes: Can be called with or without locks held. 527 * 528 * Returns: None 529 **/ 530 void 531 lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp) 532 { 533 dma_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys); 534 kfree(hbqbp); 535 return; 536 } 537 538 /** 539 * lpfc_sli4_rb_alloc - Allocate an SLI4 Receive buffer 540 * @phba: HBA to allocate a receive buffer for 541 * 542 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI 543 * pool along a non-DMA-mapped container for it. 544 * 545 * Notes: Not interrupt-safe. Must be called with no locks held. 546 * 547 * Returns: 548 * pointer to HBQ on success 549 * NULL on failure 550 **/ 551 struct hbq_dmabuf * 552 lpfc_sli4_rb_alloc(struct lpfc_hba *phba) 553 { 554 struct hbq_dmabuf *dma_buf; 555 556 dma_buf = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL); 557 if (!dma_buf) 558 return NULL; 559 560 dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL, 561 &dma_buf->hbuf.phys); 562 if (!dma_buf->hbuf.virt) { 563 kfree(dma_buf); 564 return NULL; 565 } 566 dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL, 567 &dma_buf->dbuf.phys); 568 if (!dma_buf->dbuf.virt) { 569 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt, 570 dma_buf->hbuf.phys); 571 kfree(dma_buf); 572 return NULL; 573 } 574 dma_buf->total_size = LPFC_DATA_BUF_SIZE; 575 return dma_buf; 576 } 577 578 /** 579 * lpfc_sli4_rb_free - Frees a receive buffer 580 * @phba: HBA buffer was allocated for 581 * @dmab: DMA Buffer container returned by lpfc_sli4_hbq_alloc 582 * 583 * Description: Frees both the container and the DMA-mapped buffers returned by 584 * lpfc_sli4_rb_alloc. 585 * 586 * Notes: Can be called with or without locks held. 587 * 588 * Returns: None 589 **/ 590 void 591 lpfc_sli4_rb_free(struct lpfc_hba *phba, struct hbq_dmabuf *dmab) 592 { 593 dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys); 594 dma_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys); 595 kfree(dmab); 596 } 597 598 /** 599 * lpfc_sli4_nvmet_alloc - Allocate an SLI4 Receive buffer 600 * @phba: HBA to allocate a receive buffer for 601 * 602 * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI 603 * pool along a non-DMA-mapped container for it. 604 * 605 * Returns: 606 * pointer to HBQ on success 607 * NULL on failure 608 **/ 609 struct rqb_dmabuf * 610 lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba) 611 { 612 struct rqb_dmabuf *dma_buf; 613 614 dma_buf = kzalloc(sizeof(*dma_buf), GFP_KERNEL); 615 if (!dma_buf) 616 return NULL; 617 618 dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL, 619 &dma_buf->hbuf.phys); 620 if (!dma_buf->hbuf.virt) { 621 kfree(dma_buf); 622 return NULL; 623 } 624 dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_nvmet_drb_pool, 625 GFP_KERNEL, &dma_buf->dbuf.phys); 626 if (!dma_buf->dbuf.virt) { 627 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt, 628 dma_buf->hbuf.phys); 629 kfree(dma_buf); 630 return NULL; 631 } 632 dma_buf->total_size = LPFC_NVMET_DATA_BUF_SIZE; 633 return dma_buf; 634 } 635 636 /** 637 * lpfc_sli4_nvmet_free - Frees a receive buffer 638 * @phba: HBA buffer was allocated for 639 * @dmab: DMA Buffer container returned by lpfc_sli4_rbq_alloc 640 * 641 * Description: Frees both the container and the DMA-mapped buffers returned by 642 * lpfc_sli4_nvmet_alloc. 643 * 644 * Notes: Can be called with or without locks held. 645 * 646 * Returns: None 647 **/ 648 void 649 lpfc_sli4_nvmet_free(struct lpfc_hba *phba, struct rqb_dmabuf *dmab) 650 { 651 dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys); 652 dma_pool_free(phba->lpfc_nvmet_drb_pool, 653 dmab->dbuf.virt, dmab->dbuf.phys); 654 kfree(dmab); 655 } 656 657 /** 658 * lpfc_in_buf_free - Free a DMA buffer 659 * @phba: HBA buffer is associated with 660 * @mp: Buffer to free 661 * 662 * Description: Frees the given DMA buffer in the appropriate way given if the 663 * HBA is running in SLI3 mode with HBQs enabled. 664 * 665 * Notes: Takes phba->hbalock. Can be called with or without other locks held. 666 * 667 * Returns: None 668 **/ 669 void 670 lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp) 671 { 672 struct hbq_dmabuf *hbq_entry; 673 unsigned long flags; 674 675 if (!mp) 676 return; 677 678 if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) { 679 hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf); 680 /* Check whether HBQ is still in use */ 681 spin_lock_irqsave(&phba->hbalock, flags); 682 if (!phba->hbq_in_use) { 683 spin_unlock_irqrestore(&phba->hbalock, flags); 684 return; 685 } 686 list_del(&hbq_entry->dbuf.list); 687 if (hbq_entry->tag == -1) { 688 (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer) 689 (phba, hbq_entry); 690 } else { 691 lpfc_sli_free_hbq(phba, hbq_entry); 692 } 693 spin_unlock_irqrestore(&phba->hbalock, flags); 694 } else { 695 lpfc_mbuf_free(phba, mp->virt, mp->phys); 696 kfree(mp); 697 } 698 return; 699 } 700 701 /** 702 * lpfc_rq_buf_free - Free a RQ DMA buffer 703 * @phba: HBA buffer is associated with 704 * @mp: Buffer to free 705 * 706 * Description: Frees the given DMA buffer in the appropriate way given by 707 * reposting it to its associated RQ so it can be reused. 708 * 709 * Notes: Takes phba->hbalock. Can be called with or without other locks held. 710 * 711 * Returns: None 712 **/ 713 void 714 lpfc_rq_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp) 715 { 716 struct lpfc_rqb *rqbp; 717 struct lpfc_rqe hrqe; 718 struct lpfc_rqe drqe; 719 struct rqb_dmabuf *rqb_entry; 720 unsigned long flags; 721 int rc; 722 723 if (!mp) 724 return; 725 726 rqb_entry = container_of(mp, struct rqb_dmabuf, hbuf); 727 rqbp = rqb_entry->hrq->rqbp; 728 729 spin_lock_irqsave(&phba->hbalock, flags); 730 list_del(&rqb_entry->hbuf.list); 731 hrqe.address_lo = putPaddrLow(rqb_entry->hbuf.phys); 732 hrqe.address_hi = putPaddrHigh(rqb_entry->hbuf.phys); 733 drqe.address_lo = putPaddrLow(rqb_entry->dbuf.phys); 734 drqe.address_hi = putPaddrHigh(rqb_entry->dbuf.phys); 735 rc = lpfc_sli4_rq_put(rqb_entry->hrq, rqb_entry->drq, &hrqe, &drqe); 736 if (rc < 0) { 737 lpfc_printf_log(phba, KERN_ERR, LOG_INIT, 738 "6409 Cannot post to HRQ %d: %x %x %x " 739 "DRQ %x %x\n", 740 rqb_entry->hrq->queue_id, 741 rqb_entry->hrq->host_index, 742 rqb_entry->hrq->hba_index, 743 rqb_entry->hrq->entry_count, 744 rqb_entry->drq->host_index, 745 rqb_entry->drq->hba_index); 746 (rqbp->rqb_free_buffer)(phba, rqb_entry); 747 } else { 748 list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list); 749 rqbp->buffer_count++; 750 } 751 752 spin_unlock_irqrestore(&phba->hbalock, flags); 753 } 754