drivers/scsi/lpfc/lpfc

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This source file includes following definitions.
lpfc_vport_set_state
lpfc_alloc_vpi
lpfc_free_vpi
lpfc_vport_sparm
lpfc_valid_wwn_format
lpfc_unique_wwpn
lpfc_discovery_wait
lpfc_vport_create
disable_vport
enable_vport
lpfc_vport_disable
lpfc_vport_delete
lpfc_create_vport_work_array
lpfc_destroy_vport_work_array
lpfc_vport_reset_stat_data
lpfc_alloc_bucket
lpfc_free_bucket
   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2017-2019 Broadcom. All Rights Reserved. The term *
   5  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
   6  * Copyright (C) 2004-2016 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/blkdev.h>
  25 #include <linux/delay.h>
  26 #include <linux/dma-mapping.h>
  27 #include <linux/idr.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/kthread.h>
  30 #include <linux/pci.h>
  31 #include <linux/slab.h>
  32 #include <linux/spinlock.h>
  33 #include <linux/sched/signal.h>
  34 
  35 #include <scsi/scsi.h>
  36 #include <scsi/scsi_device.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_transport_fc.h>
  39 
  40 #include "lpfc_hw4.h"
  41 #include "lpfc_hw.h"
  42 #include "lpfc_sli.h"
  43 #include "lpfc_sli4.h"
  44 #include "lpfc_nl.h"
  45 #include "lpfc_disc.h"
  46 #include "lpfc_scsi.h"
  47 #include "lpfc.h"
  48 #include "lpfc_logmsg.h"
  49 #include "lpfc_crtn.h"
  50 #include "lpfc_version.h"
  51 #include "lpfc_vport.h"
  52 
  53 inline void lpfc_vport_set_state(struct lpfc_vport *vport,
  54                                  enum fc_vport_state new_state)
  55 {
  56         struct fc_vport *fc_vport = vport->fc_vport;
  57 
  58         if (fc_vport) {
  59                 /*
  60                  * When the transport defines fc_vport_set state we will replace
  61                  * this code with the following line
  62                  */
  63                 /* fc_vport_set_state(fc_vport, new_state); */
  64                 if (new_state != FC_VPORT_INITIALIZING)
  65                         fc_vport->vport_last_state = fc_vport->vport_state;
  66                 fc_vport->vport_state = new_state;
  67         }
  68 
  69         /* for all the error states we will set the invternal state to FAILED */
  70         switch (new_state) {
  71         case FC_VPORT_NO_FABRIC_SUPP:
  72         case FC_VPORT_NO_FABRIC_RSCS:
  73         case FC_VPORT_FABRIC_LOGOUT:
  74         case FC_VPORT_FABRIC_REJ_WWN:
  75         case FC_VPORT_FAILED:
  76                 vport->port_state = LPFC_VPORT_FAILED;
  77                 break;
  78         case FC_VPORT_LINKDOWN:
  79                 vport->port_state = LPFC_VPORT_UNKNOWN;
  80                 break;
  81         default:
  82                 /* do nothing */
  83                 break;
  84         }
  85 }
  86 
  87 int
  88 lpfc_alloc_vpi(struct lpfc_hba *phba)
  89 {
  90         unsigned long vpi;
  91 
  92         spin_lock_irq(&phba->hbalock);
  93         /* Start at bit 1 because vpi zero is reserved for the physical port */
  94         vpi = find_next_zero_bit(phba->vpi_bmask, (phba->max_vpi + 1), 1);
  95         if (vpi > phba->max_vpi)
  96                 vpi = 0;
  97         else
  98                 set_bit(vpi, phba->vpi_bmask);
  99         if (phba->sli_rev == LPFC_SLI_REV4)
 100                 phba->sli4_hba.max_cfg_param.vpi_used++;
 101         spin_unlock_irq(&phba->hbalock);
 102         return vpi;
 103 }
 104 
 105 static void
 106 lpfc_free_vpi(struct lpfc_hba *phba, int vpi)
 107 {
 108         if (vpi == 0)
 109                 return;
 110         spin_lock_irq(&phba->hbalock);
 111         clear_bit(vpi, phba->vpi_bmask);
 112         if (phba->sli_rev == LPFC_SLI_REV4)
 113                 phba->sli4_hba.max_cfg_param.vpi_used--;
 114         spin_unlock_irq(&phba->hbalock);
 115 }
 116 
 117 static int
 118 lpfc_vport_sparm(struct lpfc_hba *phba, struct lpfc_vport *vport)
 119 {
 120         LPFC_MBOXQ_t *pmb;
 121         MAILBOX_t *mb;
 122         struct lpfc_dmabuf *mp;
 123         int  rc;
 124 
 125         pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 126         if (!pmb) {
 127                 return -ENOMEM;
 128         }
 129         mb = &pmb->u.mb;
 130 
 131         rc = lpfc_read_sparam(phba, pmb, vport->vpi);
 132         if (rc) {
 133                 mempool_free(pmb, phba->mbox_mem_pool);
 134                 return -ENOMEM;
 135         }
 136 
 137         /*
 138          * Grab buffer pointer and clear context1 so we can use
 139          * lpfc_sli_issue_box_wait
 140          */
 141         mp = (struct lpfc_dmabuf *)pmb->ctx_buf;
 142         pmb->ctx_buf = NULL;
 143 
 144         pmb->vport = vport;
 145         rc = lpfc_sli_issue_mbox_wait(phba, pmb, phba->fc_ratov * 2);
 146         if (rc != MBX_SUCCESS) {
 147                 if (signal_pending(current)) {
 148                         lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
 149                                          "1830 Signal aborted mbxCmd x%x\n",
 150                                          mb->mbxCommand);
 151                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 152                         kfree(mp);
 153                         if (rc != MBX_TIMEOUT)
 154                                 mempool_free(pmb, phba->mbox_mem_pool);
 155                         return -EINTR;
 156                 } else {
 157                         lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
 158                                          "1818 VPort failed init, mbxCmd x%x "
 159                                          "READ_SPARM mbxStatus x%x, rc = x%x\n",
 160                                          mb->mbxCommand, mb->mbxStatus, rc);
 161                         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 162                         kfree(mp);
 163                         if (rc != MBX_TIMEOUT)
 164                                 mempool_free(pmb, phba->mbox_mem_pool);
 165                         return -EIO;
 166                 }
 167         }
 168 
 169         memcpy(&vport->fc_sparam, mp->virt, sizeof (struct serv_parm));
 170         memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
 171                sizeof (struct lpfc_name));
 172         memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
 173                sizeof (struct lpfc_name));
 174 
 175         lpfc_mbuf_free(phba, mp->virt, mp->phys);
 176         kfree(mp);
 177         mempool_free(pmb, phba->mbox_mem_pool);
 178 
 179         return 0;
 180 }
 181 
 182 static int
 183 lpfc_valid_wwn_format(struct lpfc_hba *phba, struct lpfc_name *wwn,
 184                       const char *name_type)
 185 {
 186                                 /* ensure that IEEE format 1 addresses
 187                                  * contain zeros in bits 59-48
 188                                  */
 189         if (!((wwn->u.wwn[0] >> 4) == 1 &&
 190               ((wwn->u.wwn[0] & 0xf) != 0 || (wwn->u.wwn[1] & 0xf) != 0)))
 191                 return 1;
 192 
 193         lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 194                         "1822 Invalid %s: %02x:%02x:%02x:%02x:"
 195                         "%02x:%02x:%02x:%02x\n",
 196                         name_type,
 197                         wwn->u.wwn[0], wwn->u.wwn[1],
 198                         wwn->u.wwn[2], wwn->u.wwn[3],
 199                         wwn->u.wwn[4], wwn->u.wwn[5],
 200                         wwn->u.wwn[6], wwn->u.wwn[7]);
 201         return 0;
 202 }
 203 
 204 static int
 205 lpfc_unique_wwpn(struct lpfc_hba *phba, struct lpfc_vport *new_vport)
 206 {
 207         struct lpfc_vport *vport;
 208         unsigned long flags;
 209 
 210         spin_lock_irqsave(&phba->port_list_lock, flags);
 211         list_for_each_entry(vport, &phba->port_list, listentry) {
 212                 if (vport == new_vport)
 213                         continue;
 214                 /* If they match, return not unique */
 215                 if (memcmp(&vport->fc_sparam.portName,
 216                            &new_vport->fc_sparam.portName,
 217                            sizeof(struct lpfc_name)) == 0) {
 218                         spin_unlock_irqrestore(&phba->port_list_lock, flags);
 219                         return 0;
 220                 }
 221         }
 222         spin_unlock_irqrestore(&phba->port_list_lock, flags);
 223         return 1;
 224 }
 225 
 226 /**
 227  * lpfc_discovery_wait - Wait for driver discovery to quiesce
 228  * @vport: The virtual port for which this call is being executed.
 229  *
 230  * This driver calls this routine specifically from lpfc_vport_delete
 231  * to enforce a synchronous execution of vport
 232  * delete relative to discovery activities.  The
 233  * lpfc_vport_delete routine should not return until it
 234  * can reasonably guarantee that discovery has quiesced.
 235  * Post FDISC LOGO, the driver must wait until its SAN teardown is
 236  * complete and all resources recovered before allowing
 237  * cleanup.
 238  *
 239  * This routine does not require any locks held.
 240  **/
 241 static void lpfc_discovery_wait(struct lpfc_vport *vport)
 242 {
 243         struct lpfc_hba *phba = vport->phba;
 244         uint32_t wait_flags = 0;
 245         unsigned long wait_time_max;
 246         unsigned long start_time;
 247 
 248         wait_flags = FC_RSCN_MODE | FC_RSCN_DISCOVERY | FC_NLP_MORE |
 249                      FC_RSCN_DEFERRED | FC_NDISC_ACTIVE | FC_DISC_TMO;
 250 
 251         /*
 252          * The time constraint on this loop is a balance between the
 253          * fabric RA_TOV value and dev_loss tmo.  The driver's
 254          * devloss_tmo is 10 giving this loop a 3x multiplier minimally.
 255          */
 256         wait_time_max = msecs_to_jiffies(((phba->fc_ratov * 3) + 3) * 1000);
 257         wait_time_max += jiffies;
 258         start_time = jiffies;
 259         while (time_before(jiffies, wait_time_max)) {
 260                 if ((vport->num_disc_nodes > 0)    ||
 261                     (vport->fc_flag & wait_flags)  ||
 262                     ((vport->port_state > LPFC_VPORT_FAILED) &&
 263                      (vport->port_state < LPFC_VPORT_READY))) {
 264                         lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
 265                                         "1833 Vport discovery quiesce Wait:"
 266                                         " state x%x fc_flags x%x"
 267                                         " num_nodes x%x, waiting 1000 msecs"
 268                                         " total wait msecs x%x\n",
 269                                         vport->port_state, vport->fc_flag,
 270                                         vport->num_disc_nodes,
 271                                         jiffies_to_msecs(jiffies - start_time));
 272                         msleep(1000);
 273                 } else {
 274                         /* Base case.  Wait variants satisfied.  Break out */
 275                         lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
 276                                          "1834 Vport discovery quiesced:"
 277                                          " state x%x fc_flags x%x"
 278                                          " wait msecs x%x\n",
 279                                          vport->port_state, vport->fc_flag,
 280                                          jiffies_to_msecs(jiffies
 281                                                 - start_time));
 282                         break;
 283                 }
 284         }
 285 
 286         if (time_after(jiffies, wait_time_max))
 287                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 288                                 "1835 Vport discovery quiesce failed:"
 289                                 " state x%x fc_flags x%x wait msecs x%x\n",
 290                                 vport->port_state, vport->fc_flag,
 291                                 jiffies_to_msecs(jiffies - start_time));
 292 }
 293 
 294 int
 295 lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
 296 {
 297         struct lpfc_nodelist *ndlp;
 298         struct Scsi_Host *shost = fc_vport->shost;
 299         struct lpfc_vport *pport = (struct lpfc_vport *) shost->hostdata;
 300         struct lpfc_hba   *phba = pport->phba;
 301         struct lpfc_vport *vport = NULL;
 302         int instance;
 303         int vpi;
 304         int rc = VPORT_ERROR;
 305         int status;
 306 
 307         if ((phba->sli_rev < 3) || !(phba->cfg_enable_npiv)) {
 308                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 309                                 "1808 Create VPORT failed: "
 310                                 "NPIV is not enabled: SLImode:%d\n",
 311                                 phba->sli_rev);
 312                 rc = VPORT_INVAL;
 313                 goto error_out;
 314         }
 315 
 316         /* NPIV is not supported if HBA has NVME Target enabled */
 317         if (phba->nvmet_support) {
 318                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 319                                 "3189 Create VPORT failed: "
 320                                 "NPIV is not supported on NVME Target\n");
 321                 rc = VPORT_INVAL;
 322                 goto error_out;
 323         }
 324 
 325         vpi = lpfc_alloc_vpi(phba);
 326         if (vpi == 0) {
 327                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 328                                 "1809 Create VPORT failed: "
 329                                 "Max VPORTs (%d) exceeded\n",
 330                                 phba->max_vpi);
 331                 rc = VPORT_NORESOURCES;
 332                 goto error_out;
 333         }
 334 
 335         /* Assign an unused board number */
 336         if ((instance = lpfc_get_instance()) < 0) {
 337                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 338                                 "1810 Create VPORT failed: Cannot get "
 339                                 "instance number\n");
 340                 lpfc_free_vpi(phba, vpi);
 341                 rc = VPORT_NORESOURCES;
 342                 goto error_out;
 343         }
 344 
 345         vport = lpfc_create_port(phba, instance, &fc_vport->dev);
 346         if (!vport) {
 347                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 348                                 "1811 Create VPORT failed: vpi x%x\n", vpi);
 349                 lpfc_free_vpi(phba, vpi);
 350                 rc = VPORT_NORESOURCES;
 351                 goto error_out;
 352         }
 353 
 354         vport->vpi = vpi;
 355         lpfc_debugfs_initialize(vport);
 356 
 357         if ((status = lpfc_vport_sparm(phba, vport))) {
 358                 if (status == -EINTR) {
 359                         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 360                                          "1831 Create VPORT Interrupted.\n");
 361                         rc = VPORT_ERROR;
 362                 } else {
 363                         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 364                                          "1813 Create VPORT failed. "
 365                                          "Cannot get sparam\n");
 366                         rc = VPORT_NORESOURCES;
 367                 }
 368                 lpfc_free_vpi(phba, vpi);
 369                 destroy_port(vport);
 370                 goto error_out;
 371         }
 372 
 373         u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
 374         u64_to_wwn(fc_vport->port_name, vport->fc_portname.u.wwn);
 375 
 376         memcpy(&vport->fc_sparam.portName, vport->fc_portname.u.wwn, 8);
 377         memcpy(&vport->fc_sparam.nodeName, vport->fc_nodename.u.wwn, 8);
 378 
 379         if (!lpfc_valid_wwn_format(phba, &vport->fc_sparam.nodeName, "WWNN") ||
 380             !lpfc_valid_wwn_format(phba, &vport->fc_sparam.portName, "WWPN")) {
 381                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 382                                  "1821 Create VPORT failed. "
 383                                  "Invalid WWN format\n");
 384                 lpfc_free_vpi(phba, vpi);
 385                 destroy_port(vport);
 386                 rc = VPORT_INVAL;
 387                 goto error_out;
 388         }
 389 
 390         if (!lpfc_unique_wwpn(phba, vport)) {
 391                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 392                                  "1823 Create VPORT failed. "
 393                                  "Duplicate WWN on HBA\n");
 394                 lpfc_free_vpi(phba, vpi);
 395                 destroy_port(vport);
 396                 rc = VPORT_INVAL;
 397                 goto error_out;
 398         }
 399 
 400         /* Create binary sysfs attribute for vport */
 401         lpfc_alloc_sysfs_attr(vport);
 402 
 403         /* Set the DFT_LUN_Q_DEPTH accordingly */
 404         vport->cfg_lun_queue_depth  = phba->pport->cfg_lun_queue_depth;
 405 
 406         /* Only the physical port can support NVME for now */
 407         vport->cfg_enable_fc4_type = LPFC_ENABLE_FCP;
 408 
 409         *(struct lpfc_vport **)fc_vport->dd_data = vport;
 410         vport->fc_vport = fc_vport;
 411 
 412         /* At this point we are fully registered with SCSI Layer.  */
 413         vport->load_flag |= FC_ALLOW_FDMI;
 414         if (phba->cfg_enable_SmartSAN ||
 415             (phba->cfg_fdmi_on == LPFC_FDMI_SUPPORT)) {
 416                 /* Setup appropriate attribute masks */
 417                 vport->fdmi_hba_mask = phba->pport->fdmi_hba_mask;
 418                 vport->fdmi_port_mask = phba->pport->fdmi_port_mask;
 419         }
 420 
 421         /*
 422          * In SLI4, the vpi must be activated before it can be used
 423          * by the port.
 424          */
 425         if ((phba->sli_rev == LPFC_SLI_REV4) &&
 426             (pport->fc_flag & FC_VFI_REGISTERED)) {
 427                 rc = lpfc_sli4_init_vpi(vport);
 428                 if (rc) {
 429                         lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
 430                                         "1838 Failed to INIT_VPI on vpi %d "
 431                                         "status %d\n", vpi, rc);
 432                         rc = VPORT_NORESOURCES;
 433                         lpfc_free_vpi(phba, vpi);
 434                         goto error_out;
 435                 }
 436         } else if (phba->sli_rev == LPFC_SLI_REV4) {
 437                 /*
 438                  * Driver cannot INIT_VPI now. Set the flags to
 439                  * init_vpi when reg_vfi complete.
 440                  */
 441                 vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
 442                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 443                 rc = VPORT_OK;
 444                 goto out;
 445         }
 446 
 447         if ((phba->link_state < LPFC_LINK_UP) ||
 448             (pport->port_state < LPFC_FABRIC_CFG_LINK) ||
 449             (phba->fc_topology == LPFC_TOPOLOGY_LOOP)) {
 450                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 451                 rc = VPORT_OK;
 452                 goto out;
 453         }
 454 
 455         if (disable) {
 456                 lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
 457                 rc = VPORT_OK;
 458                 goto out;
 459         }
 460 
 461         /* Use the Physical nodes Fabric NDLP to determine if the link is
 462          * up and ready to FDISC.
 463          */
 464         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 465         if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 466             ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
 467                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
 468                         lpfc_set_disctmo(vport);
 469                         lpfc_initial_fdisc(vport);
 470                 } else {
 471                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
 472                         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 473                                          "0262 No NPIV Fabric support\n");
 474                 }
 475         } else {
 476                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 477         }
 478         rc = VPORT_OK;
 479 
 480 out:
 481         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 482                         "1825 Vport Created.\n");
 483         lpfc_host_attrib_init(lpfc_shost_from_vport(vport));
 484 error_out:
 485         return rc;
 486 }
 487 
 488 static int
 489 disable_vport(struct fc_vport *fc_vport)
 490 {
 491         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 492         struct lpfc_hba   *phba = vport->phba;
 493         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 494         long timeout;
 495         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 496 
 497         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 498         if (ndlp && NLP_CHK_NODE_ACT(ndlp)
 499             && phba->link_state >= LPFC_LINK_UP) {
 500                 vport->unreg_vpi_cmpl = VPORT_INVAL;
 501                 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 502                 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
 503                         while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
 504                                 timeout = schedule_timeout(timeout);
 505         }
 506 
 507         lpfc_sli_host_down(vport);
 508 
 509         /* Mark all nodes for discovery so we can remove them by
 510          * calling lpfc_cleanup_rpis(vport, 1)
 511          */
 512         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 513                 if (!NLP_CHK_NODE_ACT(ndlp))
 514                         continue;
 515                 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
 516                         continue;
 517                 lpfc_disc_state_machine(vport, ndlp, NULL,
 518                                         NLP_EVT_DEVICE_RECOVERY);
 519         }
 520         lpfc_cleanup_rpis(vport, 1);
 521 
 522         lpfc_stop_vport_timers(vport);
 523         lpfc_unreg_all_rpis(vport);
 524         lpfc_unreg_default_rpis(vport);
 525         /*
 526          * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi) does the
 527          * scsi_host_put() to release the vport.
 528          */
 529         lpfc_mbx_unreg_vpi(vport);
 530         if (phba->sli_rev == LPFC_SLI_REV4) {
 531                 spin_lock_irq(shost->host_lock);
 532                 vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
 533                 spin_unlock_irq(shost->host_lock);
 534         }
 535 
 536         lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
 537         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 538                          "1826 Vport Disabled.\n");
 539         return VPORT_OK;
 540 }
 541 
 542 static int
 543 enable_vport(struct fc_vport *fc_vport)
 544 {
 545         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 546         struct lpfc_hba   *phba = vport->phba;
 547         struct lpfc_nodelist *ndlp = NULL;
 548         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 549 
 550         if ((phba->link_state < LPFC_LINK_UP) ||
 551             (phba->fc_topology == LPFC_TOPOLOGY_LOOP)) {
 552                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
 553                 return VPORT_OK;
 554         }
 555 
 556         spin_lock_irq(shost->host_lock);
 557         vport->load_flag |= FC_LOADING;
 558         if (vport->fc_flag & FC_VPORT_NEEDS_INIT_VPI) {
 559                 spin_unlock_irq(shost->host_lock);
 560                 lpfc_issue_init_vpi(vport);
 561                 goto out;
 562         }
 563 
 564         vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
 565         spin_unlock_irq(shost->host_lock);
 566 
 567         /* Use the Physical nodes Fabric NDLP to determine if the link is
 568          * up and ready to FDISC.
 569          */
 570         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 571         if (ndlp && NLP_CHK_NODE_ACT(ndlp)
 572             && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
 573                 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
 574                         lpfc_set_disctmo(vport);
 575                         lpfc_initial_fdisc(vport);
 576                 } else {
 577                         lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
 578                         lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
 579                                          "0264 No NPIV Fabric support\n");
 580                 }
 581         } else {
 582                 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
 583         }
 584 
 585 out:
 586         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 587                          "1827 Vport Enabled.\n");
 588         return VPORT_OK;
 589 }
 590 
 591 int
 592 lpfc_vport_disable(struct fc_vport *fc_vport, bool disable)
 593 {
 594         if (disable)
 595                 return disable_vport(fc_vport);
 596         else
 597                 return enable_vport(fc_vport);
 598 }
 599 
 600 
 601 int
 602 lpfc_vport_delete(struct fc_vport *fc_vport)
 603 {
 604         struct lpfc_nodelist *ndlp = NULL;
 605         struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
 606         struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
 607         struct lpfc_hba   *phba = vport->phba;
 608         long timeout;
 609         bool ns_ndlp_referenced = false;
 610 
 611         if (vport->port_type == LPFC_PHYSICAL_PORT) {
 612                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 613                                  "1812 vport_delete failed: Cannot delete "
 614                                  "physical host\n");
 615                 return VPORT_ERROR;
 616         }
 617 
 618         /* If the vport is a static vport fail the deletion. */
 619         if ((vport->vport_flag & STATIC_VPORT) &&
 620                 !(phba->pport->load_flag & FC_UNLOADING)) {
 621                 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 622                                  "1837 vport_delete failed: Cannot delete "
 623                                  "static vport.\n");
 624                 return VPORT_ERROR;
 625         }
 626         spin_lock_irq(&phba->hbalock);
 627         vport->load_flag |= FC_UNLOADING;
 628         spin_unlock_irq(&phba->hbalock);
 629         /*
 630          * If we are not unloading the driver then prevent the vport_delete
 631          * from happening until after this vport's discovery is finished.
 632          */
 633         if (!(phba->pport->load_flag & FC_UNLOADING)) {
 634                 int check_count = 0;
 635                 while (check_count < ((phba->fc_ratov * 3) + 3) &&
 636                        vport->port_state > LPFC_VPORT_FAILED &&
 637                        vport->port_state < LPFC_VPORT_READY) {
 638                         check_count++;
 639                         msleep(1000);
 640                 }
 641                 if (vport->port_state > LPFC_VPORT_FAILED &&
 642                     vport->port_state < LPFC_VPORT_READY)
 643                         return -EAGAIN;
 644         }
 645         /*
 646          * This is a bit of a mess.  We want to ensure the shost doesn't get
 647          * torn down until we're done with the embedded lpfc_vport structure.
 648          *
 649          * Beyond holding a reference for this function, we also need a
 650          * reference for outstanding I/O requests we schedule during delete
 651          * processing.  But once we scsi_remove_host() we can no longer obtain
 652          * a reference through scsi_host_get().
 653          *
 654          * So we take two references here.  We release one reference at the
 655          * bottom of the function -- after delinking the vport.  And we
 656          * release the other at the completion of the unreg_vpi that get's
 657          * initiated after we've disposed of all other resources associated
 658          * with the port.
 659          */
 660         if (!scsi_host_get(shost))
 661                 return VPORT_INVAL;
 662         if (!scsi_host_get(shost)) {
 663                 scsi_host_put(shost);
 664                 return VPORT_INVAL;
 665         }
 666         lpfc_free_sysfs_attr(vport);
 667 
 668         lpfc_debugfs_terminate(vport);
 669 
 670         /*
 671          * The call to fc_remove_host might release the NameServer ndlp. Since
 672          * we might need to use the ndlp to send the DA_ID CT command,
 673          * increment the reference for the NameServer ndlp to prevent it from
 674          * being released.
 675          */
 676         ndlp = lpfc_findnode_did(vport, NameServer_DID);
 677         if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
 678                 lpfc_nlp_get(ndlp);
 679                 ns_ndlp_referenced = true;
 680         }
 681 
 682         /* Remove FC host and then SCSI host with the vport */
 683         fc_remove_host(shost);
 684         scsi_remove_host(shost);
 685 
 686         ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
 687 
 688         /* In case of driver unload, we shall not perform fabric logo as the
 689          * worker thread already stopped at this stage and, in this case, we
 690          * can safely skip the fabric logo.
 691          */
 692         if (phba->pport->load_flag & FC_UNLOADING) {
 693                 if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 694                     ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
 695                     phba->link_state >= LPFC_LINK_UP) {
 696                         /* First look for the Fabric ndlp */
 697                         ndlp = lpfc_findnode_did(vport, Fabric_DID);
 698                         if (!ndlp)
 699                                 goto skip_logo;
 700                         else if (!NLP_CHK_NODE_ACT(ndlp)) {
 701                                 ndlp = lpfc_enable_node(vport, ndlp,
 702                                                         NLP_STE_UNUSED_NODE);
 703                                 if (!ndlp)
 704                                         goto skip_logo;
 705                         }
 706                         /* Remove ndlp from vport npld list */
 707                         lpfc_dequeue_node(vport, ndlp);
 708 
 709                         /* Indicate free memory when release */
 710                         spin_lock_irq(&phba->ndlp_lock);
 711                         NLP_SET_FREE_REQ(ndlp);
 712                         spin_unlock_irq(&phba->ndlp_lock);
 713                         /* Kick off release ndlp when it can be safely done */
 714                         lpfc_nlp_put(ndlp);
 715                 }
 716                 goto skip_logo;
 717         }
 718 
 719         /* Otherwise, we will perform fabric logo as needed */
 720         if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
 721             ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
 722             phba->link_state >= LPFC_LINK_UP &&
 723             phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
 724                 if (vport->cfg_enable_da_id) {
 725                         timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 726                         if (!lpfc_ns_cmd(vport, SLI_CTNS_DA_ID, 0, 0))
 727                                 while (vport->ct_flags && timeout)
 728                                         timeout = schedule_timeout(timeout);
 729                         else
 730                                 lpfc_printf_log(vport->phba, KERN_WARNING,
 731                                                 LOG_VPORT,
 732                                                 "1829 CT command failed to "
 733                                                 "delete objects on fabric\n");
 734                 }
 735                 /* First look for the Fabric ndlp */
 736                 ndlp = lpfc_findnode_did(vport, Fabric_DID);
 737                 if (!ndlp) {
 738                         /* Cannot find existing Fabric ndlp, allocate one */
 739                         ndlp = lpfc_nlp_init(vport, Fabric_DID);
 740                         if (!ndlp)
 741                                 goto skip_logo;
 742                         /* Indicate free memory when release */
 743                         NLP_SET_FREE_REQ(ndlp);
 744                 } else {
 745                         if (!NLP_CHK_NODE_ACT(ndlp)) {
 746                                 ndlp = lpfc_enable_node(vport, ndlp,
 747                                                 NLP_STE_UNUSED_NODE);
 748                                 if (!ndlp)
 749                                         goto skip_logo;
 750                         }
 751 
 752                         /* Remove ndlp from vport list */
 753                         lpfc_dequeue_node(vport, ndlp);
 754                         spin_lock_irq(&phba->ndlp_lock);
 755                         if (!NLP_CHK_FREE_REQ(ndlp))
 756                                 /* Indicate free memory when release */
 757                                 NLP_SET_FREE_REQ(ndlp);
 758                         else {
 759                                 /* Skip this if ndlp is already in free mode */
 760                                 spin_unlock_irq(&phba->ndlp_lock);
 761                                 goto skip_logo;
 762                         }
 763                         spin_unlock_irq(&phba->ndlp_lock);
 764                 }
 765 
 766                 /*
 767                  * If the vpi is not registered, then a valid FDISC doesn't
 768                  * exist and there is no need for a ELS LOGO.  Just cleanup
 769                  * the ndlp.
 770                  */
 771                 if (!(vport->vpi_state & LPFC_VPI_REGISTERED)) {
 772                         lpfc_nlp_put(ndlp);
 773                         goto skip_logo;
 774                 }
 775 
 776                 vport->unreg_vpi_cmpl = VPORT_INVAL;
 777                 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
 778                 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
 779                         while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
 780                                 timeout = schedule_timeout(timeout);
 781         }
 782 
 783         if (!(phba->pport->load_flag & FC_UNLOADING))
 784                 lpfc_discovery_wait(vport);
 785 
 786 skip_logo:
 787 
 788         /*
 789          * If the NameServer ndlp has been incremented to allow the DA_ID CT
 790          * command to be sent, decrement the ndlp now.
 791          */
 792         if (ns_ndlp_referenced) {
 793                 ndlp = lpfc_findnode_did(vport, NameServer_DID);
 794                 lpfc_nlp_put(ndlp);
 795         }
 796 
 797         lpfc_cleanup(vport);
 798         lpfc_sli_host_down(vport);
 799 
 800         lpfc_stop_vport_timers(vport);
 801 
 802         if (!(phba->pport->load_flag & FC_UNLOADING)) {
 803                 lpfc_unreg_all_rpis(vport);
 804                 lpfc_unreg_default_rpis(vport);
 805                 /*
 806                  * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi)
 807                  * does the scsi_host_put() to release the vport.
 808                  */
 809                 if (!(vport->vpi_state & LPFC_VPI_REGISTERED) ||
 810                                 lpfc_mbx_unreg_vpi(vport))
 811                         scsi_host_put(shost);
 812         } else
 813                 scsi_host_put(shost);
 814 
 815         lpfc_free_vpi(phba, vport->vpi);
 816         vport->work_port_events = 0;
 817         spin_lock_irq(&phba->port_list_lock);
 818         list_del_init(&vport->listentry);
 819         spin_unlock_irq(&phba->port_list_lock);
 820         lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
 821                          "1828 Vport Deleted.\n");
 822         scsi_host_put(shost);
 823         return VPORT_OK;
 824 }
 825 
 826 struct lpfc_vport **
 827 lpfc_create_vport_work_array(struct lpfc_hba *phba)
 828 {
 829         struct lpfc_vport *port_iterator;
 830         struct lpfc_vport **vports;
 831         int index = 0;
 832         vports = kcalloc(phba->max_vports + 1, sizeof(struct lpfc_vport *),
 833                          GFP_KERNEL);
 834         if (vports == NULL)
 835                 return NULL;
 836         spin_lock_irq(&phba->port_list_lock);
 837         list_for_each_entry(port_iterator, &phba->port_list, listentry) {
 838                 if (port_iterator->load_flag & FC_UNLOADING)
 839                         continue;
 840                 if (!scsi_host_get(lpfc_shost_from_vport(port_iterator))) {
 841                         lpfc_printf_vlog(port_iterator, KERN_ERR, LOG_VPORT,
 842                                          "1801 Create vport work array FAILED: "
 843                                          "cannot do scsi_host_get\n");
 844                         continue;
 845                 }
 846                 vports[index++] = port_iterator;
 847         }
 848         spin_unlock_irq(&phba->port_list_lock);
 849         return vports;
 850 }
 851 
 852 void
 853 lpfc_destroy_vport_work_array(struct lpfc_hba *phba, struct lpfc_vport **vports)
 854 {
 855         int i;
 856         if (vports == NULL)
 857                 return;
 858         for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++)
 859                 scsi_host_put(lpfc_shost_from_vport(vports[i]));
 860         kfree(vports);
 861 }
 862 
 863 
 864 /**
 865  * lpfc_vport_reset_stat_data - Reset the statistical data for the vport
 866  * @vport: Pointer to vport object.
 867  *
 868  * This function resets the statistical data for the vport. This function
 869  * is called with the host_lock held
 870  **/
 871 void
 872 lpfc_vport_reset_stat_data(struct lpfc_vport *vport)
 873 {
 874         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 875 
 876         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 877                 if (!NLP_CHK_NODE_ACT(ndlp))
 878                         continue;
 879                 if (ndlp->lat_data)
 880                         memset(ndlp->lat_data, 0, LPFC_MAX_BUCKET_COUNT *
 881                                 sizeof(struct lpfc_scsicmd_bkt));
 882         }
 883 }
 884 
 885 
 886 /**
 887  * lpfc_alloc_bucket - Allocate data buffer required for statistical data
 888  * @vport: Pointer to vport object.
 889  *
 890  * This function allocates data buffer required for all the FC
 891  * nodes of the vport to collect statistical data.
 892  **/
 893 void
 894 lpfc_alloc_bucket(struct lpfc_vport *vport)
 895 {
 896         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 897 
 898         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 899                 if (!NLP_CHK_NODE_ACT(ndlp))
 900                         continue;
 901 
 902                 kfree(ndlp->lat_data);
 903                 ndlp->lat_data = NULL;
 904 
 905                 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
 906                         ndlp->lat_data = kcalloc(LPFC_MAX_BUCKET_COUNT,
 907                                          sizeof(struct lpfc_scsicmd_bkt),
 908                                          GFP_ATOMIC);
 909 
 910                         if (!ndlp->lat_data)
 911                                 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
 912                                         "0287 lpfc_alloc_bucket failed to "
 913                                         "allocate statistical data buffer DID "
 914                                         "0x%x\n", ndlp->nlp_DID);
 915                 }
 916         }
 917 }
 918 
 919 /**
 920  * lpfc_free_bucket - Free data buffer required for statistical data
 921  * @vport: Pointer to vport object.
 922  *
 923  * Th function frees statistical data buffer of all the FC
 924  * nodes of the vport.
 925  **/
 926 void
 927 lpfc_free_bucket(struct lpfc_vport *vport)
 928 {
 929         struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
 930 
 931         list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
 932                 if (!NLP_CHK_NODE_ACT(ndlp))
 933                         continue;
 934 
 935                 kfree(ndlp->lat_data);
 936                 ndlp->lat_data = NULL;
 937         }
 938 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/scsi/lpfc/lpfc_vport.c

DEFINITIONS
