root/drivers/scsi/lpfc/lpfc_mem.c

DEFINITIONS

1. lpfc_mem_alloc_active_rrq_pool_s4
2. lpfc_mem_alloc
3. lpfc_nvmet_mem_alloc
4. lpfc_mem_free
5. lpfc_mem_free_all
6. lpfc_mbuf_alloc
7. __lpfc_mbuf_free
8. lpfc_mbuf_free
9. lpfc_nvmet_buf_alloc
10. lpfc_nvmet_buf_free
11. lpfc_els_hbq_alloc
12. lpfc_els_hbq_free
13. lpfc_sli4_rb_alloc
14. lpfc_sli4_rb_free
15. lpfc_sli4_nvmet_alloc
16. lpfc_sli4_nvmet_free
17. lpfc_in_buf_free
18. lpfc_rq_buf_free

   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 <linux/nvme-fc-driver.h>
  35 
  36 #include "lpfc_hw4.h"
  37 #include "lpfc_hw.h"
  38 #include "lpfc_sli.h"
  39 #include "lpfc_sli4.h"
  40 #include "lpfc_nl.h"
  41 #include "lpfc_disc.h"
  42 #include "lpfc.h"
  43 #include "lpfc_scsi.h"
  44 #include "lpfc_nvme.h"
  45 #include "lpfc_nvmet.h"
  46 #include "lpfc_crtn.h"
  47 #include "lpfc_logmsg.h"
  48 
  49 #define LPFC_MBUF_POOL_SIZE     64      /* max elements in MBUF safety pool */
  50 #define LPFC_MEM_POOL_SIZE      64      /* max elem in non-DMA safety pool */
  51 #define LPFC_DEVICE_DATA_POOL_SIZE 64   /* max elements in device data pool */
  52 
  53 int
  54 lpfc_mem_alloc_active_rrq_pool_s4(struct lpfc_hba *phba) {
  55         size_t bytes;
  56         int max_xri = phba->sli4_hba.max_cfg_param.max_xri;
  57 
  58         if (max_xri <= 0)
  59                 return -ENOMEM;
  60         bytes = ((BITS_PER_LONG - 1 + max_xri) / BITS_PER_LONG) *
  61                   sizeof(unsigned long);
  62         phba->cfg_rrq_xri_bitmap_sz = bytes;
  63         phba->active_rrq_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
  64                                                             bytes);
  65         if (!phba->active_rrq_pool)
  66                 return -ENOMEM;
  67         else
  68                 return 0;
  69 }
  70 
  71 /**
  72  * lpfc_mem_alloc - create and allocate all PCI and memory pools
  73  * @phba: HBA to allocate pools for
  74  *
  75  * Description: Creates and allocates PCI pools lpfc_mbuf_pool,
  76  * lpfc_hrb_pool.  Creates and allocates kmalloc-backed mempools
  77  * for LPFC_MBOXQ_t and lpfc_nodelist.  Also allocates the VPI bitmask.
  78  *
  79  * Notes: Not interrupt-safe.  Must be called with no locks held.  If any
  80  * allocation fails, frees all successfully allocated memory before returning.
  81  *
  82  * Returns:
  83  *   0 on success
  84  *   -ENOMEM on failure (if any memory allocations fail)
  85  **/
  86 int
  87 lpfc_mem_alloc(struct lpfc_hba *phba, int align)
  88 {
  89         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
  90         int i;
  91 
  92 
  93         phba->lpfc_mbuf_pool = dma_pool_create("lpfc_mbuf_pool", &phba->pcidev->dev,
  94                                                         LPFC_BPL_SIZE,
  95                                                         align, 0);
  96         if (!phba->lpfc_mbuf_pool)
  97                 goto fail;
  98 
  99         pool->elements = kmalloc_array(LPFC_MBUF_POOL_SIZE,
 100                                        sizeof(struct lpfc_dmabuf),
 101                                        GFP_KERNEL);
 102         if (!pool->elements)
 103                 goto fail_free_lpfc_mbuf_pool;
 104 
 105         pool->max_count = 0;
 106         pool->current_count = 0;
 107         for ( i = 0; i < LPFC_MBUF_POOL_SIZE; i++) {
 108                 pool->elements[i].virt = dma_pool_alloc(phba->lpfc_mbuf_pool,
 109                                        GFP_KERNEL, &pool->elements[i].phys);
 110                 if (!pool->elements[i].virt)
 111                         goto fail_free_mbuf_pool;
 112                 pool->max_count++;
 113                 pool->current_count++;
 114         }
 115 
 116         phba->mbox_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
 117                                                          sizeof(LPFC_MBOXQ_t));
 118         if (!phba->mbox_mem_pool)
 119                 goto fail_free_mbuf_pool;
 120 
 121         phba->nlp_mem_pool = mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
 122                                                 sizeof(struct lpfc_nodelist));
 123         if (!phba->nlp_mem_pool)
 124                 goto fail_free_mbox_pool;
 125 
 126         if (phba->sli_rev == LPFC_SLI_REV4) {
 127                 phba->rrq_pool =
 128                         mempool_create_kmalloc_pool(LPFC_MEM_POOL_SIZE,
 129                                                 sizeof(struct lpfc_node_rrq));
 130                 if (!phba->rrq_pool)
 131                         goto fail_free_nlp_mem_pool;
 132                 phba->lpfc_hrb_pool = dma_pool_create("lpfc_hrb_pool",
 133                                               &phba->pcidev->dev,
 134                                               LPFC_HDR_BUF_SIZE, align, 0);
 135                 if (!phba->lpfc_hrb_pool)
 136                         goto fail_free_rrq_mem_pool;
 137 
 138                 phba->lpfc_drb_pool = dma_pool_create("lpfc_drb_pool",
 139                                               &phba->pcidev->dev,
 140                                               LPFC_DATA_BUF_SIZE, align, 0);
 141                 if (!phba->lpfc_drb_pool)
 142                         goto fail_free_hrb_pool;
 143                 phba->lpfc_hbq_pool = NULL;
 144         } else {
 145                 phba->lpfc_hbq_pool = dma_pool_create("lpfc_hbq_pool",
 146                         &phba->pcidev->dev, LPFC_BPL_SIZE, align, 0);
 147                 if (!phba->lpfc_hbq_pool)
 148                         goto fail_free_nlp_mem_pool;
 149                 phba->lpfc_hrb_pool = NULL;
 150                 phba->lpfc_drb_pool = NULL;
 151         }
 152 
 153         if (phba->cfg_EnableXLane) {
 154                 phba->device_data_mem_pool = mempool_create_kmalloc_pool(
 155                                         LPFC_DEVICE_DATA_POOL_SIZE,
 156                                         sizeof(struct lpfc_device_data));
 157                 if (!phba->device_data_mem_pool)
 158                         goto fail_free_drb_pool;
 159         } else {
 160                 phba->device_data_mem_pool = NULL;
 161         }
 162 
 163         return 0;
 164 fail_free_drb_pool:
 165         dma_pool_destroy(phba->lpfc_drb_pool);
 166         phba->lpfc_drb_pool = NULL;
 167  fail_free_hrb_pool:
 168         dma_pool_destroy(phba->lpfc_hrb_pool);
 169         phba->lpfc_hrb_pool = NULL;
 170  fail_free_rrq_mem_pool:
 171         mempool_destroy(phba->rrq_pool);
 172         phba->rrq_pool = NULL;
 173  fail_free_nlp_mem_pool:
 174         mempool_destroy(phba->nlp_mem_pool);
 175         phba->nlp_mem_pool = NULL;
 176  fail_free_mbox_pool:
 177         mempool_destroy(phba->mbox_mem_pool);
 178         phba->mbox_mem_pool = NULL;
 179  fail_free_mbuf_pool:
 180         while (i--)
 181                 dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
 182                                                  pool->elements[i].phys);
 183         kfree(pool->elements);
 184  fail_free_lpfc_mbuf_pool:
 185         dma_pool_destroy(phba->lpfc_mbuf_pool);
 186         phba->lpfc_mbuf_pool = NULL;
 187  fail:
 188         return -ENOMEM;
 189 }
 190 
 191 int
 192 lpfc_nvmet_mem_alloc(struct lpfc_hba *phba)
 193 {
 194         phba->lpfc_nvmet_drb_pool =
 195                 dma_pool_create("lpfc_nvmet_drb_pool",
 196                                 &phba->pcidev->dev, LPFC_NVMET_DATA_BUF_SIZE,
 197                                 SGL_ALIGN_SZ, 0);
 198         if (!phba->lpfc_nvmet_drb_pool) {
 199                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
 200                                 "6024 Can't enable NVME Target - no memory\n");
 201                 return -ENOMEM;
 202         }
 203         return 0;
 204 }
 205 
 206 /**
 207  * lpfc_mem_free - Frees memory allocated by lpfc_mem_alloc
 208  * @phba: HBA to free memory for
 209  *
 210  * Description: Free the memory allocated by lpfc_mem_alloc routine. This
 211  * routine is a the counterpart of lpfc_mem_alloc.
 212  *
 213  * Returns: None
 214  **/
 215 void
 216 lpfc_mem_free(struct lpfc_hba *phba)
 217 {
 218         int i;
 219         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 220         struct lpfc_device_data *device_data;
 221 
 222         /* Free HBQ pools */
 223         lpfc_sli_hbqbuf_free_all(phba);
 224         dma_pool_destroy(phba->lpfc_nvmet_drb_pool);
 225         phba->lpfc_nvmet_drb_pool = NULL;
 226 
 227         dma_pool_destroy(phba->lpfc_drb_pool);
 228         phba->lpfc_drb_pool = NULL;
 229 
 230         dma_pool_destroy(phba->lpfc_hrb_pool);
 231         phba->lpfc_hrb_pool = NULL;
 232 
 233         dma_pool_destroy(phba->txrdy_payload_pool);
 234         phba->txrdy_payload_pool = NULL;
 235 
 236         dma_pool_destroy(phba->lpfc_hbq_pool);
 237         phba->lpfc_hbq_pool = NULL;
 238 
 239         mempool_destroy(phba->rrq_pool);
 240         phba->rrq_pool = NULL;
 241 
 242         /* Free NLP memory pool */
 243         mempool_destroy(phba->nlp_mem_pool);
 244         phba->nlp_mem_pool = NULL;
 245         if (phba->sli_rev == LPFC_SLI_REV4 && phba->active_rrq_pool) {
 246                 mempool_destroy(phba->active_rrq_pool);
 247                 phba->active_rrq_pool = NULL;
 248         }
 249 
 250         /* Free mbox memory pool */
 251         mempool_destroy(phba->mbox_mem_pool);
 252         phba->mbox_mem_pool = NULL;
 253 
 254         /* Free MBUF memory pool */
 255         for (i = 0; i < pool->current_count; i++)
 256                 dma_pool_free(phba->lpfc_mbuf_pool, pool->elements[i].virt,
 257                               pool->elements[i].phys);
 258         kfree(pool->elements);
 259 
 260         dma_pool_destroy(phba->lpfc_mbuf_pool);
 261         phba->lpfc_mbuf_pool = NULL;
 262 
 263         /* Free Device Data memory pool */
 264         if (phba->device_data_mem_pool) {
 265                 /* Ensure all objects have been returned to the pool */
 266                 while (!list_empty(&phba->luns)) {
 267                         device_data = list_first_entry(&phba->luns,
 268                                                        struct lpfc_device_data,
 269                                                        listentry);
 270                         list_del(&device_data->listentry);
 271                         mempool_free(device_data, phba->device_data_mem_pool);
 272                 }
 273                 mempool_destroy(phba->device_data_mem_pool);
 274         }
 275         phba->device_data_mem_pool = NULL;
 276         return;
 277 }
 278 
 279 /**
 280  * lpfc_mem_free_all - Frees all PCI and driver memory
 281  * @phba: HBA to free memory for
 282  *
 283  * Description: Free memory from PCI and driver memory pools and also those
 284  * used : lpfc_sg_dma_buf_pool, lpfc_mbuf_pool, lpfc_hrb_pool. Frees
 285  * kmalloc-backed mempools for LPFC_MBOXQ_t and lpfc_nodelist. Also frees
 286  * the VPI bitmask.
 287  *
 288  * Returns: None
 289  **/
 290 void
 291 lpfc_mem_free_all(struct lpfc_hba *phba)
 292 {
 293         struct lpfc_sli *psli = &phba->sli;
 294         LPFC_MBOXQ_t *mbox, *next_mbox;
 295         struct lpfc_dmabuf   *mp;
 296 
 297         /* Free memory used in mailbox queue back to mailbox memory pool */
 298         list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq, list) {
 299                 mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
 300                 if (mp) {
 301                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 302                         kfree(mp);
 303                 }
 304                 list_del(&mbox->list);
 305                 mempool_free(mbox, phba->mbox_mem_pool);
 306         }
 307         /* Free memory used in mailbox cmpl list back to mailbox memory pool */
 308         list_for_each_entry_safe(mbox, next_mbox, &psli->mboxq_cmpl, list) {
 309                 mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
 310                 if (mp) {
 311                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 312                         kfree(mp);
 313                 }
 314                 list_del(&mbox->list);
 315                 mempool_free(mbox, phba->mbox_mem_pool);
 316         }
 317         /* Free the active mailbox command back to the mailbox memory pool */
 318         spin_lock_irq(&phba->hbalock);
 319         psli->sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
 320         spin_unlock_irq(&phba->hbalock);
 321         if (psli->mbox_active) {
 322                 mbox = psli->mbox_active;
 323                 mp = (struct lpfc_dmabuf *)(mbox->ctx_buf);
 324                 if (mp) {
 325                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 326                         kfree(mp);
 327                 }
 328                 mempool_free(mbox, phba->mbox_mem_pool);
 329                 psli->mbox_active = NULL;
 330         }
 331 
 332         /* Free and destroy all the allocated memory pools */
 333         lpfc_mem_free(phba);
 334 
 335         /* Free DMA buffer memory pool */
 336         dma_pool_destroy(phba->lpfc_sg_dma_buf_pool);
 337         phba->lpfc_sg_dma_buf_pool = NULL;
 338 
 339         dma_pool_destroy(phba->lpfc_cmd_rsp_buf_pool);
 340         phba->lpfc_cmd_rsp_buf_pool = NULL;
 341 
 342         /* Free the iocb lookup array */
 343         kfree(psli->iocbq_lookup);
 344         psli->iocbq_lookup = NULL;
 345 
 346         return;
 347 }
 348 
 349 /**
 350  * lpfc_mbuf_alloc - Allocate an mbuf from the lpfc_mbuf_pool PCI pool
 351  * @phba: HBA which owns the pool to allocate from
 352  * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
 353  * @handle: used to return the DMA-mapped address of the mbuf
 354  *
 355  * Description: Allocates a DMA-mapped buffer from the lpfc_mbuf_pool PCI pool.
 356  * Allocates from generic dma_pool_alloc function first and if that fails and
 357  * mem_flags has MEM_PRI set (the only defined flag), returns an mbuf from the
 358  * HBA's pool.
 359  *
 360  * Notes: Not interrupt-safe.  Must be called with no locks held.  Takes
 361  * phba->hbalock.
 362  *
 363  * Returns:
 364  *   pointer to the allocated mbuf on success
 365  *   NULL on failure
 366  **/
 367 void *
 368 lpfc_mbuf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
 369 {
 370         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 371         unsigned long iflags;
 372         void *ret;
 373 
 374         ret = dma_pool_alloc(phba->lpfc_mbuf_pool, GFP_KERNEL, handle);
 375 
 376         spin_lock_irqsave(&phba->hbalock, iflags);
 377         if (!ret && (mem_flags & MEM_PRI) && pool->current_count) {
 378                 pool->current_count--;
 379                 ret = pool->elements[pool->current_count].virt;
 380                 *handle = pool->elements[pool->current_count].phys;
 381         }
 382         spin_unlock_irqrestore(&phba->hbalock, iflags);
 383         return ret;
 384 }
 385 
 386 /**
 387  * __lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (locked)
 388  * @phba: HBA which owns the pool to return to
 389  * @virt: mbuf to free
 390  * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
 391  *
 392  * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
 393  * it is below its max_count, frees the mbuf otherwise.
 394  *
 395  * Notes: Must be called with phba->hbalock held to synchronize access to
 396  * lpfc_mbuf_safety_pool.
 397  *
 398  * Returns: None
 399  **/
 400 void
 401 __lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
 402 {
 403         struct lpfc_dma_pool *pool = &phba->lpfc_mbuf_safety_pool;
 404 
 405         if (pool->current_count < pool->max_count) {
 406                 pool->elements[pool->current_count].virt = virt;
 407                 pool->elements[pool->current_count].phys = dma;
 408                 pool->current_count++;
 409         } else {
 410                 dma_pool_free(phba->lpfc_mbuf_pool, virt, dma);
 411         }
 412         return;
 413 }
 414 
 415 /**
 416  * lpfc_mbuf_free - Free an mbuf from the lpfc_mbuf_pool PCI pool (unlocked)
 417  * @phba: HBA which owns the pool to return to
 418  * @virt: mbuf to free
 419  * @dma: the DMA-mapped address of the lpfc_mbuf_pool to be freed
 420  *
 421  * Description: Returns an mbuf lpfc_mbuf_pool to the lpfc_mbuf_safety_pool if
 422  * it is below its max_count, frees the mbuf otherwise.
 423  *
 424  * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
 425  *
 426  * Returns: None
 427  **/
 428 void
 429 lpfc_mbuf_free(struct lpfc_hba * phba, void *virt, dma_addr_t dma)
 430 {
 431         unsigned long iflags;
 432 
 433         spin_lock_irqsave(&phba->hbalock, iflags);
 434         __lpfc_mbuf_free(phba, virt, dma);
 435         spin_unlock_irqrestore(&phba->hbalock, iflags);
 436         return;
 437 }
 438 
 439 /**
 440  * lpfc_nvmet_buf_alloc - Allocate an nvmet_buf from the
 441  * lpfc_sg_dma_buf_pool PCI pool
 442  * @phba: HBA which owns the pool to allocate from
 443  * @mem_flags: indicates if this is a priority (MEM_PRI) allocation
 444  * @handle: used to return the DMA-mapped address of the nvmet_buf
 445  *
 446  * Description: Allocates a DMA-mapped buffer from the lpfc_sg_dma_buf_pool
 447  * PCI pool.  Allocates from generic dma_pool_alloc function.
 448  *
 449  * Returns:
 450  *   pointer to the allocated nvmet_buf on success
 451  *   NULL on failure
 452  **/
 453 void *
 454 lpfc_nvmet_buf_alloc(struct lpfc_hba *phba, int mem_flags, dma_addr_t *handle)
 455 {
 456         void *ret;
 457 
 458         ret = dma_pool_alloc(phba->lpfc_sg_dma_buf_pool, GFP_KERNEL, handle);
 459         return ret;
 460 }
 461 
 462 /**
 463  * lpfc_nvmet_buf_free - Free an nvmet_buf from the lpfc_sg_dma_buf_pool
 464  * PCI pool
 465  * @phba: HBA which owns the pool to return to
 466  * @virt: nvmet_buf to free
 467  * @dma: the DMA-mapped address of the lpfc_sg_dma_buf_pool to be freed
 468  *
 469  * Returns: None
 470  **/
 471 void
 472 lpfc_nvmet_buf_free(struct lpfc_hba *phba, void *virt, dma_addr_t dma)
 473 {
 474         dma_pool_free(phba->lpfc_sg_dma_buf_pool, virt, dma);
 475 }
 476 
 477 /**
 478  * lpfc_els_hbq_alloc - Allocate an HBQ buffer
 479  * @phba: HBA to allocate HBQ buffer for
 480  *
 481  * Description: Allocates a DMA-mapped HBQ buffer from the lpfc_hrb_pool PCI
 482  * pool along a non-DMA-mapped container for it.
 483  *
 484  * Notes: Not interrupt-safe.  Must be called with no locks held.
 485  *
 486  * Returns:
 487  *   pointer to HBQ on success
 488  *   NULL on failure
 489  **/
 490 struct hbq_dmabuf *
 491 lpfc_els_hbq_alloc(struct lpfc_hba *phba)
 492 {
 493         struct hbq_dmabuf *hbqbp;
 494 
 495         hbqbp = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
 496         if (!hbqbp)
 497                 return NULL;
 498 
 499         hbqbp->dbuf.virt = dma_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL,
 500                                           &hbqbp->dbuf.phys);
 501         if (!hbqbp->dbuf.virt) {
 502                 kfree(hbqbp);
 503                 return NULL;
 504         }
 505         hbqbp->total_size = LPFC_BPL_SIZE;
 506         return hbqbp;
 507 }
 508 
 509 /**
 510  * lpfc_els_hbq_free - Frees an HBQ buffer allocated with lpfc_els_hbq_alloc
 511  * @phba: HBA buffer was allocated for
 512  * @hbqbp: HBQ container returned by lpfc_els_hbq_alloc
 513  *
 514  * Description: Frees both the container and the DMA-mapped buffer returned by
 515  * lpfc_els_hbq_alloc.
 516  *
 517  * Notes: Can be called with or without locks held.
 518  *
 519  * Returns: None
 520  **/
 521 void
 522 lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp)
 523 {
 524         dma_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys);
 525         kfree(hbqbp);
 526         return;
 527 }
 528 
 529 /**
 530  * lpfc_sli4_rb_alloc - Allocate an SLI4 Receive buffer
 531  * @phba: HBA to allocate a receive buffer for
 532  *
 533  * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
 534  * pool along a non-DMA-mapped container for it.
 535  *
 536  * Notes: Not interrupt-safe.  Must be called with no locks held.
 537  *
 538  * Returns:
 539  *   pointer to HBQ on success
 540  *   NULL on failure
 541  **/
 542 struct hbq_dmabuf *
 543 lpfc_sli4_rb_alloc(struct lpfc_hba *phba)
 544 {
 545         struct hbq_dmabuf *dma_buf;
 546 
 547         dma_buf = kzalloc(sizeof(struct hbq_dmabuf), GFP_KERNEL);
 548         if (!dma_buf)
 549                 return NULL;
 550 
 551         dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
 552                                             &dma_buf->hbuf.phys);
 553         if (!dma_buf->hbuf.virt) {
 554                 kfree(dma_buf);
 555                 return NULL;
 556         }
 557         dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_drb_pool, GFP_KERNEL,
 558                                             &dma_buf->dbuf.phys);
 559         if (!dma_buf->dbuf.virt) {
 560                 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
 561                               dma_buf->hbuf.phys);
 562                 kfree(dma_buf);
 563                 return NULL;
 564         }
 565         dma_buf->total_size = LPFC_DATA_BUF_SIZE;
 566         return dma_buf;
 567 }
 568 
 569 /**
 570  * lpfc_sli4_rb_free - Frees a receive buffer
 571  * @phba: HBA buffer was allocated for
 572  * @dmab: DMA Buffer container returned by lpfc_sli4_hbq_alloc
 573  *
 574  * Description: Frees both the container and the DMA-mapped buffers returned by
 575  * lpfc_sli4_rb_alloc.
 576  *
 577  * Notes: Can be called with or without locks held.
 578  *
 579  * Returns: None
 580  **/
 581 void
 582 lpfc_sli4_rb_free(struct lpfc_hba *phba, struct hbq_dmabuf *dmab)
 583 {
 584         dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
 585         dma_pool_free(phba->lpfc_drb_pool, dmab->dbuf.virt, dmab->dbuf.phys);
 586         kfree(dmab);
 587 }
 588 
 589 /**
 590  * lpfc_sli4_nvmet_alloc - Allocate an SLI4 Receive buffer
 591  * @phba: HBA to allocate a receive buffer for
 592  *
 593  * Description: Allocates a DMA-mapped receive buffer from the lpfc_hrb_pool PCI
 594  * pool along a non-DMA-mapped container for it.
 595  *
 596  * Notes: Not interrupt-safe.  Must be called with no locks held.
 597  *
 598  * Returns:
 599  *   pointer to HBQ on success
 600  *   NULL on failure
 601  **/
 602 struct rqb_dmabuf *
 603 lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
 604 {
 605         struct rqb_dmabuf *dma_buf;
 606 
 607         dma_buf = kzalloc(sizeof(struct rqb_dmabuf), GFP_KERNEL);
 608         if (!dma_buf)
 609                 return NULL;
 610 
 611         dma_buf->hbuf.virt = dma_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
 612                                             &dma_buf->hbuf.phys);
 613         if (!dma_buf->hbuf.virt) {
 614                 kfree(dma_buf);
 615                 return NULL;
 616         }
 617         dma_buf->dbuf.virt = dma_pool_alloc(phba->lpfc_nvmet_drb_pool,
 618                                             GFP_KERNEL, &dma_buf->dbuf.phys);
 619         if (!dma_buf->dbuf.virt) {
 620                 dma_pool_free(phba->lpfc_hrb_pool, dma_buf->hbuf.virt,
 621                               dma_buf->hbuf.phys);
 622                 kfree(dma_buf);
 623                 return NULL;
 624         }
 625         dma_buf->total_size = LPFC_NVMET_DATA_BUF_SIZE;
 626         return dma_buf;
 627 }
 628 
 629 /**
 630  * lpfc_sli4_nvmet_free - Frees a receive buffer
 631  * @phba: HBA buffer was allocated for
 632  * @dmab: DMA Buffer container returned by lpfc_sli4_rbq_alloc
 633  *
 634  * Description: Frees both the container and the DMA-mapped buffers returned by
 635  * lpfc_sli4_nvmet_alloc.
 636  *
 637  * Notes: Can be called with or without locks held.
 638  *
 639  * Returns: None
 640  **/
 641 void
 642 lpfc_sli4_nvmet_free(struct lpfc_hba *phba, struct rqb_dmabuf *dmab)
 643 {
 644         dma_pool_free(phba->lpfc_hrb_pool, dmab->hbuf.virt, dmab->hbuf.phys);
 645         dma_pool_free(phba->lpfc_nvmet_drb_pool,
 646                       dmab->dbuf.virt, dmab->dbuf.phys);
 647         kfree(dmab);
 648 }
 649 
 650 /**
 651  * lpfc_in_buf_free - Free a DMA buffer
 652  * @phba: HBA buffer is associated with
 653  * @mp: Buffer to free
 654  *
 655  * Description: Frees the given DMA buffer in the appropriate way given if the
 656  * HBA is running in SLI3 mode with HBQs enabled.
 657  *
 658  * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
 659  *
 660  * Returns: None
 661  **/
 662 void
 663 lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
 664 {
 665         struct hbq_dmabuf *hbq_entry;
 666         unsigned long flags;
 667 
 668         if (!mp)
 669                 return;
 670 
 671         if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
 672                 hbq_entry = container_of(mp, struct hbq_dmabuf, dbuf);
 673                 /* Check whether HBQ is still in use */
 674                 spin_lock_irqsave(&phba->hbalock, flags);
 675                 if (!phba->hbq_in_use) {
 676                         spin_unlock_irqrestore(&phba->hbalock, flags);
 677                         return;
 678                 }
 679                 list_del(&hbq_entry->dbuf.list);
 680                 if (hbq_entry->tag == -1) {
 681                         (phba->hbqs[LPFC_ELS_HBQ].hbq_free_buffer)
 682                                 (phba, hbq_entry);
 683                 } else {
 684                         lpfc_sli_free_hbq(phba, hbq_entry);
 685                 }
 686                 spin_unlock_irqrestore(&phba->hbalock, flags);
 687         } else {
 688                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
 689                 kfree(mp);
 690         }
 691         return;
 692 }
 693 
 694 /**
 695  * lpfc_rq_buf_free - Free a RQ DMA buffer
 696  * @phba: HBA buffer is associated with
 697  * @mp: Buffer to free
 698  *
 699  * Description: Frees the given DMA buffer in the appropriate way given by
 700  * reposting it to its associated RQ so it can be reused.
 701  *
 702  * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
 703  *
 704  * Returns: None
 705  **/
 706 void
 707 lpfc_rq_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
 708 {
 709         struct lpfc_rqb *rqbp;
 710         struct lpfc_rqe hrqe;
 711         struct lpfc_rqe drqe;
 712         struct rqb_dmabuf *rqb_entry;
 713         unsigned long flags;
 714         int rc;
 715 
 716         if (!mp)
 717                 return;
 718 
 719         rqb_entry = container_of(mp, struct rqb_dmabuf, hbuf);
 720         rqbp = rqb_entry->hrq->rqbp;
 721 
 722         spin_lock_irqsave(&phba->hbalock, flags);
 723         list_del(&rqb_entry->hbuf.list);
 724         hrqe.address_lo = putPaddrLow(rqb_entry->hbuf.phys);
 725         hrqe.address_hi = putPaddrHigh(rqb_entry->hbuf.phys);
 726         drqe.address_lo = putPaddrLow(rqb_entry->dbuf.phys);
 727         drqe.address_hi = putPaddrHigh(rqb_entry->dbuf.phys);
 728         rc = lpfc_sli4_rq_put(rqb_entry->hrq, rqb_entry->drq, &hrqe, &drqe);
 729         if (rc < 0) {
 730                 (rqbp->rqb_free_buffer)(phba, rqb_entry);
 731                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
 732                                 "6409 Cannot post to HRQ %d: %x %x %x "
 733                                 "DRQ %x %x\n",
 734                                 rqb_entry->hrq->queue_id,
 735                                 rqb_entry->hrq->host_index,
 736                                 rqb_entry->hrq->hba_index,
 737                                 rqb_entry->hrq->entry_count,
 738                                 rqb_entry->drq->host_index,
 739                                 rqb_entry->drq->hba_index);
 740         } else {
 741                 list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list);
 742                 rqbp->buffer_count++;
 743         }
 744 
 745         spin_unlock_irqrestore(&phba->hbalock, flags);
 746 }