drivers/scsi/qedf/qedf_main.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  QLogic FCoE Offload Driver
   4  *  Copyright (c) 2016-2018 Cavium Inc.
   5  */
   6 #include <linux/init.h>
   7 #include <linux/kernel.h>
   8 #include <linux/module.h>
   9 #include <linux/pci.h>
  10 #include <linux/device.h>
  11 #include <linux/highmem.h>
  12 #include <linux/crc32.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/list.h>
  15 #include <linux/kthread.h>
  16 #include <scsi/libfc.h>
  17 #include <scsi/scsi_host.h>
  18 #include <scsi/fc_frame.h>
  19 #include <linux/if_ether.h>
  20 #include <linux/if_vlan.h>
  21 #include <linux/cpu.h>
  22 #include "qedf.h"
  23 #include "qedf_dbg.h"
  24 #include <uapi/linux/pci_regs.h>
  25
  26 const struct qed_fcoe_ops *qed_ops;
  27
  28 static int qedf_probe(struct pci_dev *pdev, const struct pci_device_id *id);
  29 static void qedf_remove(struct pci_dev *pdev);
  30
  31 /*
  32  * Driver module parameters.
  33  */
  34 static unsigned int qedf_dev_loss_tmo = 60;
  35 module_param_named(dev_loss_tmo, qedf_dev_loss_tmo, int, S_IRUGO);
  36 MODULE_PARM_DESC(dev_loss_tmo,  " dev_loss_tmo setting for attached "
  37         "remote ports (default 60)");
  38
  39 uint qedf_debug = QEDF_LOG_INFO;
  40 module_param_named(debug, qedf_debug, uint, S_IRUGO);
  41 MODULE_PARM_DESC(debug, " Debug mask. Pass '1' to enable default debugging"
  42         " mask");
  43
  44 static uint qedf_fipvlan_retries = 60;
  45 module_param_named(fipvlan_retries, qedf_fipvlan_retries, int, S_IRUGO);
  46 MODULE_PARM_DESC(fipvlan_retries, " Number of FIP VLAN requests to attempt "
  47         "before giving up (default 60)");
  48
  49 static uint qedf_fallback_vlan = QEDF_FALLBACK_VLAN;
  50 module_param_named(fallback_vlan, qedf_fallback_vlan, int, S_IRUGO);
  51 MODULE_PARM_DESC(fallback_vlan, " VLAN ID to try if fip vlan request fails "
  52         "(default 1002).");
  53
  54 static int qedf_default_prio = -1;
  55 module_param_named(default_prio, qedf_default_prio, int, S_IRUGO);
  56 MODULE_PARM_DESC(default_prio, " Override 802.1q priority for FIP and FCoE"
  57         " traffic (value between 0 and 7, default 3).");
  58
  59 uint qedf_dump_frames;
  60 module_param_named(dump_frames, qedf_dump_frames, int, S_IRUGO | S_IWUSR);
  61 MODULE_PARM_DESC(dump_frames, " Print the skb data of FIP and FCoE frames "
  62         "(default off)");
  63
  64 static uint qedf_queue_depth;
  65 module_param_named(queue_depth, qedf_queue_depth, int, S_IRUGO);
  66 MODULE_PARM_DESC(queue_depth, " Sets the queue depth for all LUNs discovered "
  67         "by the qedf driver. Default is 0 (use OS default).");
  68
  69 uint qedf_io_tracing;
  70 module_param_named(io_tracing, qedf_io_tracing, int, S_IRUGO | S_IWUSR);
  71 MODULE_PARM_DESC(io_tracing, " Enable logging of SCSI requests/completions "
  72         "into trace buffer. (default off).");
  73
  74 static uint qedf_max_lun = MAX_FIBRE_LUNS;
  75 module_param_named(max_lun, qedf_max_lun, int, S_IRUGO);
  76 MODULE_PARM_DESC(max_lun, " Sets the maximum luns per target that the driver "
  77         "supports. (default 0xffffffff)");
  78
  79 uint qedf_link_down_tmo;
  80 module_param_named(link_down_tmo, qedf_link_down_tmo, int, S_IRUGO);
  81 MODULE_PARM_DESC(link_down_tmo, " Delays informing the fcoe transport that the "
  82         "link is down by N seconds.");
  83
  84 bool qedf_retry_delay;
  85 module_param_named(retry_delay, qedf_retry_delay, bool, S_IRUGO | S_IWUSR);
  86 MODULE_PARM_DESC(retry_delay, " Enable/disable handling of FCP_RSP IU retry "
  87         "delay handling (default off).");
  88
  89 static bool qedf_dcbx_no_wait;
  90 module_param_named(dcbx_no_wait, qedf_dcbx_no_wait, bool, S_IRUGO | S_IWUSR);
  91 MODULE_PARM_DESC(dcbx_no_wait, " Do not wait for DCBX convergence to start "
  92         "sending FIP VLAN requests on link up (Default: off).");
  93
  94 static uint qedf_dp_module;
  95 module_param_named(dp_module, qedf_dp_module, uint, S_IRUGO);
  96 MODULE_PARM_DESC(dp_module, " bit flags control for verbose printk passed "
  97         "qed module during probe.");
  98
  99 static uint qedf_dp_level = QED_LEVEL_NOTICE;
 100 module_param_named(dp_level, qedf_dp_level, uint, S_IRUGO);
 101 MODULE_PARM_DESC(dp_level, " printk verbosity control passed to qed module  "
 102         "during probe (0-3: 0 more verbose).");
 103
 104 struct workqueue_struct *qedf_io_wq;
 105
 106 static struct fcoe_percpu_s qedf_global;
 107 static DEFINE_SPINLOCK(qedf_global_lock);
 108
 109 static struct kmem_cache *qedf_io_work_cache;
 110
 111 void qedf_set_vlan_id(struct qedf_ctx *qedf, int vlan_id)
 112 {
 113         qedf->vlan_id = vlan_id;
 114         qedf->vlan_id |= qedf->prio << VLAN_PRIO_SHIFT;
 115         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Setting vlan_id=%04x "
 116                    "prio=%d.\n", vlan_id, qedf->prio);
 117 }
 118
 119 /* Returns true if we have a valid vlan, false otherwise */
 120 static bool qedf_initiate_fipvlan_req(struct qedf_ctx *qedf)
 121 {
 122         int rc;
 123
 124         while (qedf->fipvlan_retries--) {
 125                 /* This is to catch if link goes down during fipvlan retries */
 126                 if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN) {
 127                         QEDF_ERR(&qedf->dbg_ctx, "Link not up.\n");
 128                         return false;
 129                 }
 130
 131                 if (qedf->vlan_id > 0)
 132                         return true;
 133
 134                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
 135                            "Retry %d.\n", qedf->fipvlan_retries);
 136                 init_completion(&qedf->fipvlan_compl);
 137                 qedf_fcoe_send_vlan_req(qedf);
 138                 rc = wait_for_completion_timeout(&qedf->fipvlan_compl,
 139                     1 * HZ);
 140                 if (rc > 0 &&
 141                     (atomic_read(&qedf->link_state) == QEDF_LINK_UP)) {
 142                         fcoe_ctlr_link_up(&qedf->ctlr);
 143                         return true;
 144                 }
 145         }
 146
 147         return false;
 148 }
 149
 150 static void qedf_handle_link_update(struct work_struct *work)
 151 {
 152         struct qedf_ctx *qedf =
 153             container_of(work, struct qedf_ctx, link_update.work);
 154         int rc;
 155
 156         QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC, "Entered. link_state=%d.\n",
 157                   atomic_read(&qedf->link_state));
 158
 159         if (atomic_read(&qedf->link_state) == QEDF_LINK_UP) {
 160                 rc = qedf_initiate_fipvlan_req(qedf);
 161                 if (rc)
 162                         return;
 163
 164                 if (atomic_read(&qedf->link_state) != QEDF_LINK_UP) {
 165                         qedf->vlan_id = 0;
 166                         return;
 167                 }
 168
 169                 /*
 170                  * If we get here then we never received a repsonse to our
 171                  * fip vlan request so set the vlan_id to the default and
 172                  * tell FCoE that the link is up
 173                  */
 174                 QEDF_WARN(&(qedf->dbg_ctx), "Did not receive FIP VLAN "
 175                            "response, falling back to default VLAN %d.\n",
 176                            qedf_fallback_vlan);
 177                 qedf_set_vlan_id(qedf, qedf_fallback_vlan);
 178
 179                 /*
 180                  * Zero out data_src_addr so we'll update it with the new
 181                  * lport port_id
 182                  */
 183                 eth_zero_addr(qedf->data_src_addr);
 184                 fcoe_ctlr_link_up(&qedf->ctlr);
 185         } else if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN) {
 186                 /*
 187                  * If we hit here and link_down_tmo_valid is still 1 it means
 188                  * that link_down_tmo timed out so set it to 0 to make sure any
 189                  * other readers have accurate state.
 190                  */
 191                 atomic_set(&qedf->link_down_tmo_valid, 0);
 192                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
 193                     "Calling fcoe_ctlr_link_down().\n");
 194                 fcoe_ctlr_link_down(&qedf->ctlr);
 195                 if (qedf_wait_for_upload(qedf) == false)
 196                         QEDF_ERR(&qedf->dbg_ctx,
 197                                  "Could not upload all sessions.\n");
 198                 /* Reset the number of FIP VLAN retries */
 199                 qedf->fipvlan_retries = qedf_fipvlan_retries;
 200         }
 201 }
 202
 203 #define QEDF_FCOE_MAC_METHOD_GRANGED_MAC                1
 204 #define QEDF_FCOE_MAC_METHOD_FCF_MAP                    2
 205 #define QEDF_FCOE_MAC_METHOD_FCOE_SET_MAC               3
 206 static void qedf_set_data_src_addr(struct qedf_ctx *qedf, struct fc_frame *fp)
 207 {
 208         u8 *granted_mac;
 209         struct fc_frame_header *fh = fc_frame_header_get(fp);
 210         u8 fc_map[3];
 211         int method = 0;
 212
 213         /* Get granted MAC address from FIP FLOGI payload */
 214         granted_mac = fr_cb(fp)->granted_mac;
 215
 216         /*
 217          * We set the source MAC for FCoE traffic based on the Granted MAC
 218          * address from the switch.
 219          *
 220          * If granted_mac is non-zero, we used that.
 221          * If the granted_mac is zeroed out, created the FCoE MAC based on
 222          * the sel_fcf->fc_map and the d_id fo the FLOGI frame.
 223          * If sel_fcf->fc_map is 0 then we use the default FCF-MAC plus the
 224          * d_id of the FLOGI frame.
 225          */
 226         if (!is_zero_ether_addr(granted_mac)) {
 227                 ether_addr_copy(qedf->data_src_addr, granted_mac);
 228                 method = QEDF_FCOE_MAC_METHOD_GRANGED_MAC;
 229         } else if (qedf->ctlr.sel_fcf->fc_map != 0) {
 230                 hton24(fc_map, qedf->ctlr.sel_fcf->fc_map);
 231                 qedf->data_src_addr[0] = fc_map[0];
 232                 qedf->data_src_addr[1] = fc_map[1];
 233                 qedf->data_src_addr[2] = fc_map[2];
 234                 qedf->data_src_addr[3] = fh->fh_d_id[0];
 235                 qedf->data_src_addr[4] = fh->fh_d_id[1];
 236                 qedf->data_src_addr[5] = fh->fh_d_id[2];
 237                 method = QEDF_FCOE_MAC_METHOD_FCF_MAP;
 238         } else {
 239                 fc_fcoe_set_mac(qedf->data_src_addr, fh->fh_d_id);
 240                 method = QEDF_FCOE_MAC_METHOD_FCOE_SET_MAC;
 241         }
 242
 243         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
 244             "QEDF data_src_mac=%pM method=%d.\n", qedf->data_src_addr, method);
 245 }
 246
 247 static void qedf_flogi_resp(struct fc_seq *seq, struct fc_frame *fp,
 248         void *arg)
 249 {
 250         struct fc_exch *exch = fc_seq_exch(seq);
 251         struct fc_lport *lport = exch->lp;
 252         struct qedf_ctx *qedf = lport_priv(lport);
 253
 254         if (!qedf) {
 255                 QEDF_ERR(NULL, "qedf is NULL.\n");
 256                 return;
 257         }
 258
 259         /*
 260          * If ERR_PTR is set then don't try to stat anything as it will cause
 261          * a crash when we access fp.
 262          */
 263         if (IS_ERR(fp)) {
 264                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
 265                     "fp has IS_ERR() set.\n");
 266                 goto skip_stat;
 267         }
 268
 269         /* Log stats for FLOGI reject */
 270         if (fc_frame_payload_op(fp) == ELS_LS_RJT)
 271                 qedf->flogi_failed++;
 272         else if (fc_frame_payload_op(fp) == ELS_LS_ACC) {
 273                 /* Set the source MAC we will use for FCoE traffic */
 274                 qedf_set_data_src_addr(qedf, fp);
 275         }
 276
 277         /* Complete flogi_compl so we can proceed to sending ADISCs */
 278         complete(&qedf->flogi_compl);
 279
 280 skip_stat:
 281         /* Report response to libfc */
 282         fc_lport_flogi_resp(seq, fp, lport);
 283 }
 284
 285 static struct fc_seq *qedf_elsct_send(struct fc_lport *lport, u32 did,
 286         struct fc_frame *fp, unsigned int op,
 287         void (*resp)(struct fc_seq *,
 288         struct fc_frame *,
 289         void *),
 290         void *arg, u32 timeout)
 291 {
 292         struct qedf_ctx *qedf = lport_priv(lport);
 293
 294         /*
 295          * Intercept FLOGI for statistic purposes. Note we use the resp
 296          * callback to tell if this is really a flogi.
 297          */
 298         if (resp == fc_lport_flogi_resp) {
 299                 qedf->flogi_cnt++;
 300                 return fc_elsct_send(lport, did, fp, op, qedf_flogi_resp,
 301                     arg, timeout);
 302         }
 303
 304         return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
 305 }
 306
 307 int qedf_send_flogi(struct qedf_ctx *qedf)
 308 {
 309         struct fc_lport *lport;
 310         struct fc_frame *fp;
 311
 312         lport = qedf->lport;
 313
 314         if (!lport->tt.elsct_send)
 315                 return -EINVAL;
 316
 317         fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
 318         if (!fp) {
 319                 QEDF_ERR(&(qedf->dbg_ctx), "fc_frame_alloc failed.\n");
 320                 return -ENOMEM;
 321         }
 322
 323         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_ELS,
 324             "Sending FLOGI to reestablish session with switch.\n");
 325         lport->tt.elsct_send(lport, FC_FID_FLOGI, fp,
 326             ELS_FLOGI, qedf_flogi_resp, lport, lport->r_a_tov);
 327
 328         init_completion(&qedf->flogi_compl);
 329
 330         return 0;
 331 }
 332
 333 struct qedf_tmp_rdata_item {
 334         struct fc_rport_priv *rdata;
 335         struct list_head list;
 336 };
 337
 338 /*
 339  * This function is called if link_down_tmo is in use.  If we get a link up and
 340  * link_down_tmo has not expired then use just FLOGI/ADISC to recover our
 341  * sessions with targets.  Otherwise, just call fcoe_ctlr_link_up().
 342  */
 343 static void qedf_link_recovery(struct work_struct *work)
 344 {
 345         struct qedf_ctx *qedf =
 346             container_of(work, struct qedf_ctx, link_recovery.work);
 347         struct qedf_rport *fcport;
 348         struct fc_rport_priv *rdata;
 349         struct qedf_tmp_rdata_item *rdata_item, *tmp_rdata_item;
 350         bool rc;
 351         int retries = 30;
 352         int rval, i;
 353         struct list_head rdata_login_list;
 354
 355         INIT_LIST_HEAD(&rdata_login_list);
 356
 357         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
 358             "Link down tmo did not expire.\n");
 359
 360         /*
 361          * Essentially reset the fcoe_ctlr here without affecting the state
 362          * of the libfc structs.
 363          */
 364         qedf->ctlr.state = FIP_ST_LINK_WAIT;
 365         fcoe_ctlr_link_down(&qedf->ctlr);
 366
 367         /*
 368          * Bring the link up before we send the fipvlan request so libfcoe
 369          * can select a new fcf in parallel
 370          */
 371         fcoe_ctlr_link_up(&qedf->ctlr);
 372
 373         /* Since the link when down and up to verify which vlan we're on */
 374         qedf->fipvlan_retries = qedf_fipvlan_retries;
 375         rc = qedf_initiate_fipvlan_req(qedf);
 376         /* If getting the VLAN fails, set the VLAN to the fallback one */
 377         if (!rc)
 378                 qedf_set_vlan_id(qedf, qedf_fallback_vlan);
 379
 380         /*
 381          * We need to wait for an FCF to be selected due to the
 382          * fcoe_ctlr_link_up other the FLOGI will be rejected.
 383          */
 384         while (retries > 0) {
 385                 if (qedf->ctlr.sel_fcf) {
 386                         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
 387                             "FCF reselected, proceeding with FLOGI.\n");
 388                         break;
 389                 }
 390                 msleep(500);
 391                 retries--;
 392         }
 393
 394         if (retries < 1) {
 395                 QEDF_ERR(&(qedf->dbg_ctx), "Exhausted retries waiting for "
 396                     "FCF selection.\n");
 397                 return;
 398         }
 399
 400         rval = qedf_send_flogi(qedf);
 401         if (rval)
 402                 return;
 403
 404         /* Wait for FLOGI completion before proceeding with sending ADISCs */
 405         i = wait_for_completion_timeout(&qedf->flogi_compl,
 406             qedf->lport->r_a_tov);
 407         if (i == 0) {
 408                 QEDF_ERR(&(qedf->dbg_ctx), "FLOGI timed out.\n");
 409                 return;
 410         }
 411
 412         /*
 413          * Call lport->tt.rport_login which will cause libfc to send an
 414          * ADISC since the rport is in state ready.
 415          */
 416         rcu_read_lock();
 417         list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
 418                 rdata = fcport->rdata;
 419                 if (rdata == NULL)
 420                         continue;
 421                 rdata_item = kzalloc(sizeof(struct qedf_tmp_rdata_item),
 422                     GFP_ATOMIC);
 423                 if (!rdata_item)
 424                         continue;
 425                 if (kref_get_unless_zero(&rdata->kref)) {
 426                         rdata_item->rdata = rdata;
 427                         list_add(&rdata_item->list, &rdata_login_list);
 428                 } else
 429                         kfree(rdata_item);
 430         }
 431         rcu_read_unlock();
 432         /*
 433          * Do the fc_rport_login outside of the rcu lock so we don't take a
 434          * mutex in an atomic context.
 435          */
 436         list_for_each_entry_safe(rdata_item, tmp_rdata_item, &rdata_login_list,
 437             list) {
 438                 list_del(&rdata_item->list);
 439                 fc_rport_login(rdata_item->rdata);
 440                 kref_put(&rdata_item->rdata->kref, fc_rport_destroy);
 441                 kfree(rdata_item);
 442         }
 443 }
 444
 445 static void qedf_update_link_speed(struct qedf_ctx *qedf,
 446         struct qed_link_output *link)
 447 {
 448         struct fc_lport *lport = qedf->lport;
 449
 450         lport->link_speed = FC_PORTSPEED_UNKNOWN;
 451         lport->link_supported_speeds = FC_PORTSPEED_UNKNOWN;
 452
 453         /* Set fc_host link speed */
 454         switch (link->speed) {
 455         case 10000:
 456                 lport->link_speed = FC_PORTSPEED_10GBIT;
 457                 break;
 458         case 25000:
 459                 lport->link_speed = FC_PORTSPEED_25GBIT;
 460                 break;
 461         case 40000:
 462                 lport->link_speed = FC_PORTSPEED_40GBIT;
 463                 break;
 464         case 50000:
 465                 lport->link_speed = FC_PORTSPEED_50GBIT;
 466                 break;
 467         case 100000:
 468                 lport->link_speed = FC_PORTSPEED_100GBIT;
 469                 break;
 470         default:
 471                 lport->link_speed = FC_PORTSPEED_UNKNOWN;
 472                 break;
 473         }
 474
 475         /*
 476          * Set supported link speed by querying the supported
 477          * capabilities of the link.
 478          */
 479         if (link->supported_caps & SUPPORTED_10000baseKR_Full)
 480                 lport->link_supported_speeds |= FC_PORTSPEED_10GBIT;
 481         if (link->supported_caps & SUPPORTED_25000baseKR_Full)
 482                 lport->link_supported_speeds |= FC_PORTSPEED_25GBIT;
 483         if (link->supported_caps & SUPPORTED_40000baseLR4_Full)
 484                 lport->link_supported_speeds |= FC_PORTSPEED_40GBIT;
 485         if (link->supported_caps & SUPPORTED_50000baseKR2_Full)
 486                 lport->link_supported_speeds |= FC_PORTSPEED_50GBIT;
 487         if (link->supported_caps & SUPPORTED_100000baseKR4_Full)
 488                 lport->link_supported_speeds |= FC_PORTSPEED_100GBIT;
 489         fc_host_supported_speeds(lport->host) = lport->link_supported_speeds;
 490 }
 491
 492 static void qedf_link_update(void *dev, struct qed_link_output *link)
 493 {
 494         struct qedf_ctx *qedf = (struct qedf_ctx *)dev;
 495
 496         if (link->link_up) {
 497                 if (atomic_read(&qedf->link_state) == QEDF_LINK_UP) {
 498                         QEDF_INFO((&qedf->dbg_ctx), QEDF_LOG_DISC,
 499                             "Ignoring link up event as link is already up.\n");
 500                         return;
 501                 }
 502                 QEDF_ERR(&(qedf->dbg_ctx), "LINK UP (%d GB/s).\n",
 503                     link->speed / 1000);
 504
 505                 /* Cancel any pending link down work */
 506                 cancel_delayed_work(&qedf->link_update);
 507
 508                 atomic_set(&qedf->link_state, QEDF_LINK_UP);
 509                 qedf_update_link_speed(qedf, link);
 510
 511                 if (atomic_read(&qedf->dcbx) == QEDF_DCBX_DONE ||
 512                     qedf_dcbx_no_wait) {
 513                         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
 514                              "DCBx done.\n");
 515                         if (atomic_read(&qedf->link_down_tmo_valid) > 0)
 516                                 queue_delayed_work(qedf->link_update_wq,
 517                                     &qedf->link_recovery, 0);
 518                         else
 519                                 queue_delayed_work(qedf->link_update_wq,
 520                                     &qedf->link_update, 0);
 521                         atomic_set(&qedf->link_down_tmo_valid, 0);
 522                 }
 523
 524         } else {
 525                 QEDF_ERR(&(qedf->dbg_ctx), "LINK DOWN.\n");
 526
 527                 atomic_set(&qedf->link_state, QEDF_LINK_DOWN);
 528                 atomic_set(&qedf->dcbx, QEDF_DCBX_PENDING);
 529                 /*
 530                  * Flag that we're waiting for the link to come back up before
 531                  * informing the fcoe layer of the event.
 532                  */
 533                 if (qedf_link_down_tmo > 0) {
 534                         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
 535                             "Starting link down tmo.\n");
 536                         atomic_set(&qedf->link_down_tmo_valid, 1);
 537                 }
 538                 qedf->vlan_id = 0;
 539                 qedf_update_link_speed(qedf, link);
 540                 queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
 541                     qedf_link_down_tmo * HZ);
 542         }
 543 }
 544
 545
 546 static void qedf_dcbx_handler(void *dev, struct qed_dcbx_get *get, u32 mib_type)
 547 {
 548         struct qedf_ctx *qedf = (struct qedf_ctx *)dev;
 549         u8 tmp_prio;
 550
 551         QEDF_ERR(&(qedf->dbg_ctx), "DCBx event valid=%d enabled=%d fcoe "
 552             "prio=%d.\n", get->operational.valid, get->operational.enabled,
 553             get->operational.app_prio.fcoe);
 554
 555         if (get->operational.enabled && get->operational.valid) {
 556                 /* If DCBX was already negotiated on link up then just exit */
 557                 if (atomic_read(&qedf->dcbx) == QEDF_DCBX_DONE) {
 558                         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
 559                             "DCBX already set on link up.\n");
 560                         return;
 561                 }
 562
 563                 atomic_set(&qedf->dcbx, QEDF_DCBX_DONE);
 564
 565                 /*
 566                  * Set the 8021q priority in the following manner:
 567                  *
 568                  * 1. If a modparam is set use that
 569                  * 2. If the value is not between 0..7 use the default
 570                  * 3. Use the priority we get from the DCBX app tag
 571                  */
 572                 tmp_prio = get->operational.app_prio.fcoe;
 573                 if (qedf_default_prio > -1)
 574                         qedf->prio = qedf_default_prio;
 575                 else if (tmp_prio < 0 || tmp_prio > 7) {
 576                         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
 577                             "FIP/FCoE prio %d out of range, setting to %d.\n",
 578                             tmp_prio, QEDF_DEFAULT_PRIO);
 579                         qedf->prio = QEDF_DEFAULT_PRIO;
 580                 } else
 581                         qedf->prio = tmp_prio;
 582
 583                 if (atomic_read(&qedf->link_state) == QEDF_LINK_UP &&
 584                     !qedf_dcbx_no_wait) {
 585                         if (atomic_read(&qedf->link_down_tmo_valid) > 0)
 586                                 queue_delayed_work(qedf->link_update_wq,
 587                                     &qedf->link_recovery, 0);
 588                         else
 589                                 queue_delayed_work(qedf->link_update_wq,
 590                                     &qedf->link_update, 0);
 591                         atomic_set(&qedf->link_down_tmo_valid, 0);
 592                 }
 593         }
 594
 595 }
 596
 597 static u32 qedf_get_login_failures(void *cookie)
 598 {
 599         struct qedf_ctx *qedf;
 600
 601         qedf = (struct qedf_ctx *)cookie;
 602         return qedf->flogi_failed;
 603 }
 604
 605 static struct qed_fcoe_cb_ops qedf_cb_ops = {
 606         {
 607                 .link_update = qedf_link_update,
 608                 .dcbx_aen = qedf_dcbx_handler,
 609                 .get_generic_tlv_data = qedf_get_generic_tlv_data,
 610                 .get_protocol_tlv_data = qedf_get_protocol_tlv_data,
 611         }
 612 };
 613
 614 /*
 615  * Various transport templates.
 616  */
 617
 618 static struct scsi_transport_template *qedf_fc_transport_template;
 619 static struct scsi_transport_template *qedf_fc_vport_transport_template;
 620
 621 /*
 622  * SCSI EH handlers
 623  */
 624 static int qedf_eh_abort(struct scsi_cmnd *sc_cmd)
 625 {
 626         struct fc_rport *rport = starget_to_rport(scsi_target(sc_cmd->device));
 627         struct fc_lport *lport;
 628         struct qedf_ctx *qedf;
 629         struct qedf_ioreq *io_req;
 630         struct fc_rport_libfc_priv *rp = rport->dd_data;
 631         struct fc_rport_priv *rdata;
 632         struct qedf_rport *fcport = NULL;
 633         int rc = FAILED;
 634         int wait_count = 100;
 635         int refcount = 0;
 636         int rval;
 637         int got_ref = 0;
 638
 639         lport = shost_priv(sc_cmd->device->host);
 640         qedf = (struct qedf_ctx *)lport_priv(lport);
 641
 642         /* rport and tgt are allocated together, so tgt should be non-NULL */
 643         fcport = (struct qedf_rport *)&rp[1];
 644         rdata = fcport->rdata;
 645         if (!rdata || !kref_get_unless_zero(&rdata->kref)) {
 646                 QEDF_ERR(&qedf->dbg_ctx, "stale rport, sc_cmd=%p\n", sc_cmd);
 647                 rc = 1;
 648                 goto out;
 649         }
 650
 651
 652         io_req = (struct qedf_ioreq *)sc_cmd->SCp.ptr;
 653         if (!io_req) {
 654                 QEDF_ERR(&qedf->dbg_ctx,
 655                          "sc_cmd not queued with lld, sc_cmd=%p op=0x%02x, port_id=%06x\n",
 656                          sc_cmd, sc_cmd->cmnd[0],
 657                          rdata->ids.port_id);
 658                 rc = SUCCESS;
 659                 goto drop_rdata_kref;
 660         }
 661
 662         rval = kref_get_unless_zero(&io_req->refcount); /* ID: 005 */
 663         if (rval)
 664                 got_ref = 1;
 665
 666         /* If we got a valid io_req, confirm it belongs to this sc_cmd. */
 667         if (!rval || io_req->sc_cmd != sc_cmd) {
 668                 QEDF_ERR(&qedf->dbg_ctx,
 669                          "Freed/Incorrect io_req, io_req->sc_cmd=%p, sc_cmd=%p, port_id=%06x, bailing out.\n",
 670                          io_req->sc_cmd, sc_cmd, rdata->ids.port_id);
 671
 672                 goto drop_rdata_kref;
 673         }
 674
 675         if (fc_remote_port_chkready(rport)) {
 676                 refcount = kref_read(&io_req->refcount);
 677                 QEDF_ERR(&qedf->dbg_ctx,
 678                          "rport not ready, io_req=%p, xid=0x%x sc_cmd=%p op=0x%02x, refcount=%d, port_id=%06x\n",
 679                          io_req, io_req->xid, sc_cmd, sc_cmd->cmnd[0],
 680                          refcount, rdata->ids.port_id);
 681
 682                 goto drop_rdata_kref;
 683         }
 684
 685         rc = fc_block_scsi_eh(sc_cmd);
 686         if (rc)
 687                 goto drop_rdata_kref;
 688
 689         if (test_bit(QEDF_RPORT_UPLOADING_CONNECTION, &fcport->flags)) {
 690                 QEDF_ERR(&qedf->dbg_ctx,
 691                          "Connection uploading, xid=0x%x., port_id=%06x\n",
 692                          io_req->xid, rdata->ids.port_id);
 693                 while (io_req->sc_cmd && (wait_count != 0)) {
 694                         msleep(100);
 695                         wait_count--;
 696                 }
 697                 if (wait_count) {
 698                         QEDF_ERR(&qedf->dbg_ctx, "ABTS succeeded\n");
 699                         rc = SUCCESS;
 700                 } else {
 701                         QEDF_ERR(&qedf->dbg_ctx, "ABTS failed\n");
 702                         rc = FAILED;
 703                 }
 704                 goto drop_rdata_kref;
 705         }
 706
 707         if (lport->state != LPORT_ST_READY || !(lport->link_up)) {
 708                 QEDF_ERR(&qedf->dbg_ctx, "link not ready.\n");
 709                 goto drop_rdata_kref;
 710         }
 711
 712         QEDF_ERR(&qedf->dbg_ctx,
 713                  "Aborting io_req=%p sc_cmd=%p xid=0x%x fp_idx=%d, port_id=%06x.\n",
 714                  io_req, sc_cmd, io_req->xid, io_req->fp_idx,
 715                  rdata->ids.port_id);
 716
 717         if (qedf->stop_io_on_error) {
 718                 qedf_stop_all_io(qedf);
 719                 rc = SUCCESS;
 720                 goto drop_rdata_kref;
 721         }
 722
 723         init_completion(&io_req->abts_done);
 724         rval = qedf_initiate_abts(io_req, true);
 725         if (rval) {
 726                 QEDF_ERR(&(qedf->dbg_ctx), "Failed to queue ABTS.\n");
 727                 /*
 728                  * If we fail to queue the ABTS then return this command to
 729                  * the SCSI layer as it will own and free the xid
 730                  */
 731                 rc = SUCCESS;
 732                 qedf_scsi_done(qedf, io_req, DID_ERROR);
 733                 goto drop_rdata_kref;
 734         }
 735
 736         wait_for_completion(&io_req->abts_done);
 737
 738         if (io_req->event == QEDF_IOREQ_EV_ABORT_SUCCESS ||
 739             io_req->event == QEDF_IOREQ_EV_ABORT_FAILED ||
 740             io_req->event == QEDF_IOREQ_EV_CLEANUP_SUCCESS) {
 741                 /*
 742                  * If we get a reponse to the abort this is success from
 743                  * the perspective that all references to the command have
 744                  * been removed from the driver and firmware
 745                  */
 746                 rc = SUCCESS;
 747         } else {
 748                 /* If the abort and cleanup failed then return a failure */
 749                 rc = FAILED;
 750         }
 751
 752         if (rc == SUCCESS)
 753                 QEDF_ERR(&(qedf->dbg_ctx), "ABTS succeeded, xid=0x%x.\n",
 754                           io_req->xid);
 755         else
 756                 QEDF_ERR(&(qedf->dbg_ctx), "ABTS failed, xid=0x%x.\n",
 757                           io_req->xid);
 758
 759 drop_rdata_kref:
 760         kref_put(&rdata->kref, fc_rport_destroy);
 761 out:
 762         if (got_ref)
 763                 kref_put(&io_req->refcount, qedf_release_cmd);
 764         return rc;
 765 }
 766
 767 static int qedf_eh_target_reset(struct scsi_cmnd *sc_cmd)
 768 {
 769         QEDF_ERR(NULL, "%d:0:%d:%lld: TARGET RESET Issued...",
 770                  sc_cmd->device->host->host_no, sc_cmd->device->id,
 771                  sc_cmd->device->lun);
 772         return qedf_initiate_tmf(sc_cmd, FCP_TMF_TGT_RESET);
 773 }
 774
 775 static int qedf_eh_device_reset(struct scsi_cmnd *sc_cmd)
 776 {
 777         QEDF_ERR(NULL, "%d:0:%d:%lld: LUN RESET Issued... ",
 778                  sc_cmd->device->host->host_no, sc_cmd->device->id,
 779                  sc_cmd->device->lun);
 780         return qedf_initiate_tmf(sc_cmd, FCP_TMF_LUN_RESET);
 781 }
 782
 783 bool qedf_wait_for_upload(struct qedf_ctx *qedf)
 784 {
 785         struct qedf_rport *fcport = NULL;
 786         int wait_cnt = 120;
 787
 788         while (wait_cnt--) {
 789                 if (atomic_read(&qedf->num_offloads))
 790                         QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
 791                                   "Waiting for all uploads to complete num_offloads = 0x%x.\n",
 792                                   atomic_read(&qedf->num_offloads));
 793                 else
 794                         return true;
 795                 msleep(500);
 796         }
 797
 798         rcu_read_lock();
 799         list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
 800                 if (fcport && test_bit(QEDF_RPORT_SESSION_READY,
 801                                        &fcport->flags)) {
 802                         if (fcport->rdata)
 803                                 QEDF_ERR(&qedf->dbg_ctx,
 804                                          "Waiting for fcport %p portid=%06x.\n",
 805                                          fcport, fcport->rdata->ids.port_id);
 806                         } else {
 807                                 QEDF_ERR(&qedf->dbg_ctx,
 808                                          "Waiting for fcport %p.\n", fcport);
 809                         }
 810         }
 811         rcu_read_unlock();
 812         return false;
 813
 814 }
 815
 816 /* Performs soft reset of qedf_ctx by simulating a link down/up */
 817 void qedf_ctx_soft_reset(struct fc_lport *lport)
 818 {
 819         struct qedf_ctx *qedf;
 820         struct qed_link_output if_link;
 821
 822         if (lport->vport) {
 823                 QEDF_ERR(NULL, "Cannot issue host reset on NPIV port.\n");
 824                 return;
 825         }
 826
 827         qedf = lport_priv(lport);
 828
 829         /* For host reset, essentially do a soft link up/down */
 830         atomic_set(&qedf->link_state, QEDF_LINK_DOWN);
 831         QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
 832                   "Queuing link down work.\n");
 833         queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
 834             0);
 835
 836         if (qedf_wait_for_upload(qedf) == false) {
 837                 QEDF_ERR(&qedf->dbg_ctx, "Could not upload all sessions.\n");
 838                 WARN_ON(atomic_read(&qedf->num_offloads));
 839         }
 840
 841         /* Before setting link up query physical link state */
 842         qed_ops->common->get_link(qedf->cdev, &if_link);
 843         /* Bail if the physical link is not up */
 844         if (!if_link.link_up) {
 845                 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
 846                           "Physical link is not up.\n");
 847                 return;
 848         }
 849         /* Flush and wait to make sure link down is processed */
 850         flush_delayed_work(&qedf->link_update);
 851         msleep(500);
 852
 853         atomic_set(&qedf->link_state, QEDF_LINK_UP);
 854         qedf->vlan_id  = 0;
 855         QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_DISC,
 856                   "Queue link up work.\n");
 857         queue_delayed_work(qedf->link_update_wq, &qedf->link_update,
 858             0);
 859 }
 860
 861 /* Reset the host by gracefully logging out and then logging back in */
 862 static int qedf_eh_host_reset(struct scsi_cmnd *sc_cmd)
 863 {
 864         struct fc_lport *lport;
 865         struct qedf_ctx *qedf;
 866
 867         lport = shost_priv(sc_cmd->device->host);
 868         qedf = lport_priv(lport);
 869
 870         if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN ||
 871             test_bit(QEDF_UNLOADING, &qedf->flags))
 872                 return FAILED;
 873
 874         QEDF_ERR(&(qedf->dbg_ctx), "HOST RESET Issued...");
 875
 876         qedf_ctx_soft_reset(lport);
 877
 878         return SUCCESS;
 879 }
 880
 881 static int qedf_slave_configure(struct scsi_device *sdev)
 882 {
 883         if (qedf_queue_depth) {
 884                 scsi_change_queue_depth(sdev, qedf_queue_depth);
 885         }
 886
 887         return 0;
 888 }
 889
 890 static struct scsi_host_template qedf_host_template = {
 891         .module         = THIS_MODULE,
 892         .name           = QEDF_MODULE_NAME,
 893         .this_id        = -1,
 894         .cmd_per_lun    = 32,
 895         .max_sectors    = 0xffff,
 896         .queuecommand   = qedf_queuecommand,
 897         .shost_attrs    = qedf_host_attrs,
 898         .eh_abort_handler       = qedf_eh_abort,
 899         .eh_device_reset_handler = qedf_eh_device_reset, /* lun reset */
 900         .eh_target_reset_handler = qedf_eh_target_reset, /* target reset */
 901         .eh_host_reset_handler  = qedf_eh_host_reset,
 902         .slave_configure        = qedf_slave_configure,
 903         .dma_boundary = QED_HW_DMA_BOUNDARY,
 904         .sg_tablesize = QEDF_MAX_BDS_PER_CMD,
 905         .can_queue = FCOE_PARAMS_NUM_TASKS,
 906         .change_queue_depth = scsi_change_queue_depth,
 907 };
 908
 909 static int qedf_get_paged_crc_eof(struct sk_buff *skb, int tlen)
 910 {
 911         int rc;
 912
 913         spin_lock(&qedf_global_lock);
 914         rc = fcoe_get_paged_crc_eof(skb, tlen, &qedf_global);
 915         spin_unlock(&qedf_global_lock);
 916
 917         return rc;
 918 }
 919
 920 static struct qedf_rport *qedf_fcport_lookup(struct qedf_ctx *qedf, u32 port_id)
 921 {
 922         struct qedf_rport *fcport;
 923         struct fc_rport_priv *rdata;
 924
 925         rcu_read_lock();
 926         list_for_each_entry_rcu(fcport, &qedf->fcports, peers) {
 927                 rdata = fcport->rdata;
 928                 if (rdata == NULL)
 929                         continue;
 930                 if (rdata->ids.port_id == port_id) {
 931                         rcu_read_unlock();
 932                         return fcport;
 933                 }
 934         }
 935         rcu_read_unlock();
 936
 937         /* Return NULL to caller to let them know fcport was not found */
 938         return NULL;
 939 }
 940
 941 /* Transmits an ELS frame over an offloaded session */
 942 static int qedf_xmit_l2_frame(struct qedf_rport *fcport, struct fc_frame *fp)
 943 {
 944         struct fc_frame_header *fh;
 945         int rc = 0;
 946
 947         fh = fc_frame_header_get(fp);
 948         if ((fh->fh_type == FC_TYPE_ELS) &&
 949             (fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
 950                 switch (fc_frame_payload_op(fp)) {
 951                 case ELS_ADISC:
 952                         qedf_send_adisc(fcport, fp);
 953                         rc = 1;
 954                         break;
 955                 }
 956         }
 957
 958         return rc;
 959 }
 960
 961 /**
 962  * qedf_xmit - qedf FCoE frame transmit function
 963  *
 964  */
 965 static int qedf_xmit(struct fc_lport *lport, struct fc_frame *fp)
 966 {
 967         struct fc_lport         *base_lport;
 968         struct qedf_ctx         *qedf;
 969         struct ethhdr           *eh;
 970         struct fcoe_crc_eof     *cp;
 971         struct sk_buff          *skb;
 972         struct fc_frame_header  *fh;
 973         struct fcoe_hdr         *hp;
 974         u8                      sof, eof;
 975         u32                     crc;
 976         unsigned int            hlen, tlen, elen;
 977         int                     wlen;
 978         struct fc_stats         *stats;
 979         struct fc_lport *tmp_lport;
 980         struct fc_lport *vn_port = NULL;
 981         struct qedf_rport *fcport;
 982         int rc;
 983         u16 vlan_tci = 0;
 984
 985         qedf = (struct qedf_ctx *)lport_priv(lport);
 986
 987         fh = fc_frame_header_get(fp);
 988         skb = fp_skb(fp);
 989
 990         /* Filter out traffic to other NPIV ports on the same host */
 991         if (lport->vport)
 992                 base_lport = shost_priv(vport_to_shost(lport->vport));
 993         else
 994                 base_lport = lport;
 995
 996         /* Flag if the destination is the base port */
 997         if (base_lport->port_id == ntoh24(fh->fh_d_id)) {
 998                 vn_port = base_lport;
 999         } else {
1000                 /* Got through the list of vports attached to the base_lport
1001                  * and see if we have a match with the destination address.
1002                  */
1003                 list_for_each_entry(tmp_lport, &base_lport->vports, list) {
1004                         if (tmp_lport->port_id == ntoh24(fh->fh_d_id)) {
1005                                 vn_port = tmp_lport;
1006                                 break;
1007                         }
1008                 }
1009         }
1010         if (vn_port && ntoh24(fh->fh_d_id) != FC_FID_FLOGI) {
1011                 struct fc_rport_priv *rdata = NULL;
1012
1013                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
1014                     "Dropping FCoE frame to %06x.\n", ntoh24(fh->fh_d_id));
1015                 kfree_skb(skb);
1016                 rdata = fc_rport_lookup(lport, ntoh24(fh->fh_d_id));
1017                 if (rdata) {
1018                         rdata->retries = lport->max_rport_retry_count;
1019                         kref_put(&rdata->kref, fc_rport_destroy);
1020                 }
1021                 return -EINVAL;
1022         }
1023         /* End NPIV filtering */
1024
1025         if (!qedf->ctlr.sel_fcf) {
1026                 kfree_skb(skb);
1027                 return 0;
1028         }
1029
1030         if (!test_bit(QEDF_LL2_STARTED, &qedf->flags)) {
1031                 QEDF_WARN(&(qedf->dbg_ctx), "LL2 not started\n");
1032                 kfree_skb(skb);
1033                 return 0;
1034         }
1035
1036         if (atomic_read(&qedf->link_state) != QEDF_LINK_UP) {
1037                 QEDF_WARN(&(qedf->dbg_ctx), "qedf link down\n");
1038                 kfree_skb(skb);
1039                 return 0;
1040         }
1041
1042         if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
1043                 if (fcoe_ctlr_els_send(&qedf->ctlr, lport, skb))
1044                         return 0;
1045         }
1046
1047         /* Check to see if this needs to be sent on an offloaded session */
1048         fcport = qedf_fcport_lookup(qedf, ntoh24(fh->fh_d_id));
1049
1050         if (fcport && test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
1051                 rc = qedf_xmit_l2_frame(fcport, fp);
1052                 /*
1053                  * If the frame was successfully sent over the middle path
1054                  * then do not try to also send it over the LL2 path
1055                  */
1056                 if (rc)
1057                         return 0;
1058         }
1059
1060         sof = fr_sof(fp);
1061         eof = fr_eof(fp);
1062
1063         elen = sizeof(struct ethhdr);
1064         hlen = sizeof(struct fcoe_hdr);
1065         tlen = sizeof(struct fcoe_crc_eof);
1066         wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1067
1068         skb->ip_summed = CHECKSUM_NONE;
1069         crc = fcoe_fc_crc(fp);
1070
1071         /* copy port crc and eof to the skb buff */
1072         if (skb_is_nonlinear(skb)) {
1073                 skb_frag_t *frag;
1074
1075                 if (qedf_get_paged_crc_eof(skb, tlen)) {
1076                         kfree_skb(skb);
1077                         return -ENOMEM;
1078                 }
1079                 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1080                 cp = kmap_atomic(skb_frag_page(frag)) + frag->page_offset;
1081         } else {
1082                 cp = skb_put(skb, tlen);
1083         }
1084
1085         memset(cp, 0, sizeof(*cp));
1086         cp->fcoe_eof = eof;
1087         cp->fcoe_crc32 = cpu_to_le32(~crc);
1088         if (skb_is_nonlinear(skb)) {
1089                 kunmap_atomic(cp);
1090                 cp = NULL;
1091         }
1092
1093
1094         /* adjust skb network/transport offsets to match mac/fcoe/port */
1095         skb_push(skb, elen + hlen);
1096         skb_reset_mac_header(skb);
1097         skb_reset_network_header(skb);
1098         skb->mac_len = elen;
1099         skb->protocol = htons(ETH_P_FCOE);
1100
1101         /*
1102          * Add VLAN tag to non-offload FCoE frame based on current stored VLAN
1103          * for FIP/FCoE traffic.
1104          */
1105         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), qedf->vlan_id);
1106
1107         /* fill up mac and fcoe headers */
1108         eh = eth_hdr(skb);
1109         eh->h_proto = htons(ETH_P_FCOE);
1110         if (qedf->ctlr.map_dest)
1111                 fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
1112         else
1113                 /* insert GW address */
1114                 ether_addr_copy(eh->h_dest, qedf->ctlr.dest_addr);
1115
1116         /* Set the source MAC address */
1117         ether_addr_copy(eh->h_source, qedf->data_src_addr);
1118
1119         hp = (struct fcoe_hdr *)(eh + 1);
1120         memset(hp, 0, sizeof(*hp));
1121         if (FC_FCOE_VER)
1122                 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1123         hp->fcoe_sof = sof;
1124
1125         /*update tx stats */
1126         stats = per_cpu_ptr(lport->stats, get_cpu());
1127         stats->TxFrames++;
1128         stats->TxWords += wlen;
1129         put_cpu();
1130
1131         /* Get VLAN ID from skb for printing purposes */
1132         __vlan_hwaccel_get_tag(skb, &vlan_tci);
1133
1134         /* send down to lld */
1135         fr_dev(fp) = lport;
1136         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2, "FCoE frame send: "
1137             "src=%06x dest=%06x r_ctl=%x type=%x vlan=%04x.\n",
1138             ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl, fh->fh_type,
1139             vlan_tci);
1140         if (qedf_dump_frames)
1141                 print_hex_dump(KERN_WARNING, "fcoe: ", DUMP_PREFIX_OFFSET, 16,
1142                     1, skb->data, skb->len, false);
1143         rc = qed_ops->ll2->start_xmit(qedf->cdev, skb, 0);
1144         if (rc) {
1145                 QEDF_ERR(&qedf->dbg_ctx, "start_xmit failed rc = %d.\n", rc);
1146                 kfree_skb(skb);
1147                 return rc;
1148         }
1149
1150         return 0;
1151 }
1152
1153 static int qedf_alloc_sq(struct qedf_ctx *qedf, struct qedf_rport *fcport)
1154 {
1155         int rval = 0;
1156         u32 *pbl;
1157         dma_addr_t page;
1158         int num_pages;
1159
1160         /* Calculate appropriate queue and PBL sizes */
1161         fcport->sq_mem_size = SQ_NUM_ENTRIES * sizeof(struct fcoe_wqe);
1162         fcport->sq_mem_size = ALIGN(fcport->sq_mem_size, QEDF_PAGE_SIZE);
1163         fcport->sq_pbl_size = (fcport->sq_mem_size / QEDF_PAGE_SIZE) *
1164             sizeof(void *);
1165         fcport->sq_pbl_size = fcport->sq_pbl_size + QEDF_PAGE_SIZE;
1166
1167         fcport->sq = dma_alloc_coherent(&qedf->pdev->dev, fcport->sq_mem_size,
1168                                         &fcport->sq_dma, GFP_KERNEL);
1169         if (!fcport->sq) {
1170                 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate send queue.\n");
1171                 rval = 1;
1172                 goto out;
1173         }
1174
1175         fcport->sq_pbl = dma_alloc_coherent(&qedf->pdev->dev,
1176                                             fcport->sq_pbl_size,
1177                                             &fcport->sq_pbl_dma, GFP_KERNEL);
1178         if (!fcport->sq_pbl) {
1179                 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate send queue PBL.\n");
1180                 rval = 1;
1181                 goto out_free_sq;
1182         }
1183
1184         /* Create PBL */
1185         num_pages = fcport->sq_mem_size / QEDF_PAGE_SIZE;
1186         page = fcport->sq_dma;
1187         pbl = (u32 *)fcport->sq_pbl;
1188
1189         while (num_pages--) {
1190                 *pbl = U64_LO(page);
1191                 pbl++;
1192                 *pbl = U64_HI(page);
1193                 pbl++;
1194                 page += QEDF_PAGE_SIZE;
1195         }
1196
1197         return rval;
1198
1199 out_free_sq:
1200         dma_free_coherent(&qedf->pdev->dev, fcport->sq_mem_size, fcport->sq,
1201             fcport->sq_dma);
1202 out:
1203         return rval;
1204 }
1205
1206 static void qedf_free_sq(struct qedf_ctx *qedf, struct qedf_rport *fcport)
1207 {
1208         if (fcport->sq_pbl)
1209                 dma_free_coherent(&qedf->pdev->dev, fcport->sq_pbl_size,
1210                     fcport->sq_pbl, fcport->sq_pbl_dma);
1211         if (fcport->sq)
1212                 dma_free_coherent(&qedf->pdev->dev, fcport->sq_mem_size,
1213                     fcport->sq, fcport->sq_dma);
1214 }
1215
1216 static int qedf_offload_connection(struct qedf_ctx *qedf,
1217         struct qedf_rport *fcport)
1218 {
1219         struct qed_fcoe_params_offload conn_info;
1220         u32 port_id;
1221         int rval;
1222         uint16_t total_sqe = (fcport->sq_mem_size / sizeof(struct fcoe_wqe));
1223
1224         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Offloading connection "
1225                    "portid=%06x.\n", fcport->rdata->ids.port_id);
1226         rval = qed_ops->acquire_conn(qedf->cdev, &fcport->handle,
1227             &fcport->fw_cid, &fcport->p_doorbell);
1228         if (rval) {
1229                 QEDF_WARN(&(qedf->dbg_ctx), "Could not acquire connection "
1230                            "for portid=%06x.\n", fcport->rdata->ids.port_id);
1231                 rval = 1; /* For some reason qed returns 0 on failure here */
1232                 goto out;
1233         }
1234
1235         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "portid=%06x "
1236                    "fw_cid=%08x handle=%d.\n", fcport->rdata->ids.port_id,
1237                    fcport->fw_cid, fcport->handle);
1238
1239         memset(&conn_info, 0, sizeof(struct qed_fcoe_params_offload));
1240
1241         /* Fill in the offload connection info */
1242         conn_info.sq_pbl_addr = fcport->sq_pbl_dma;
1243
1244         conn_info.sq_curr_page_addr = (dma_addr_t)(*(u64 *)fcport->sq_pbl);
1245         conn_info.sq_next_page_addr =
1246             (dma_addr_t)(*(u64 *)(fcport->sq_pbl + 8));
1247
1248         /* Need to use our FCoE MAC for the offload session */
1249         ether_addr_copy(conn_info.src_mac, qedf->data_src_addr);
1250
1251         ether_addr_copy(conn_info.dst_mac, qedf->ctlr.dest_addr);
1252
1253         conn_info.tx_max_fc_pay_len = fcport->rdata->maxframe_size;
1254         conn_info.e_d_tov_timer_val = qedf->lport->e_d_tov / 20;
1255         conn_info.rec_tov_timer_val = 3; /* I think this is what E3 was */
1256         conn_info.rx_max_fc_pay_len = fcport->rdata->maxframe_size;
1257
1258         /* Set VLAN data */
1259         conn_info.vlan_tag = qedf->vlan_id <<
1260             FCOE_CONN_OFFLOAD_RAMROD_DATA_VLAN_ID_SHIFT;
1261         conn_info.vlan_tag |=
1262             qedf->prio << FCOE_CONN_OFFLOAD_RAMROD_DATA_PRIORITY_SHIFT;
1263         conn_info.flags |= (FCOE_CONN_OFFLOAD_RAMROD_DATA_B_VLAN_FLAG_MASK <<
1264             FCOE_CONN_OFFLOAD_RAMROD_DATA_B_VLAN_FLAG_SHIFT);
1265
1266         /* Set host port source id */
1267         port_id = fc_host_port_id(qedf->lport->host);
1268         fcport->sid = port_id;
1269         conn_info.s_id.addr_hi = (port_id & 0x000000FF);
1270         conn_info.s_id.addr_mid = (port_id & 0x0000FF00) >> 8;
1271         conn_info.s_id.addr_lo = (port_id & 0x00FF0000) >> 16;
1272
1273         conn_info.max_conc_seqs_c3 = fcport->rdata->max_seq;
1274
1275         /* Set remote port destination id */
1276         port_id = fcport->rdata->rport->port_id;
1277         conn_info.d_id.addr_hi = (port_id & 0x000000FF);
1278         conn_info.d_id.addr_mid = (port_id & 0x0000FF00) >> 8;
1279         conn_info.d_id.addr_lo = (port_id & 0x00FF0000) >> 16;
1280
1281         conn_info.def_q_idx = 0; /* Default index for send queue? */
1282
1283         /* Set FC-TAPE specific flags if needed */
1284         if (fcport->dev_type == QEDF_RPORT_TYPE_TAPE) {
1285                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN,
1286                     "Enable CONF, REC for portid=%06x.\n",
1287                     fcport->rdata->ids.port_id);
1288                 conn_info.flags |= 1 <<
1289                     FCOE_CONN_OFFLOAD_RAMROD_DATA_B_CONF_REQ_SHIFT;
1290                 conn_info.flags |=
1291                     ((fcport->rdata->sp_features & FC_SP_FT_SEQC) ? 1 : 0) <<
1292                     FCOE_CONN_OFFLOAD_RAMROD_DATA_B_REC_VALID_SHIFT;
1293         }
1294
1295         rval = qed_ops->offload_conn(qedf->cdev, fcport->handle, &conn_info);
1296         if (rval) {
1297                 QEDF_WARN(&(qedf->dbg_ctx), "Could not offload connection "
1298                            "for portid=%06x.\n", fcport->rdata->ids.port_id);
1299                 goto out_free_conn;
1300         } else
1301                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Offload "
1302                            "succeeded portid=%06x total_sqe=%d.\n",
1303                            fcport->rdata->ids.port_id, total_sqe);
1304
1305         spin_lock_init(&fcport->rport_lock);
1306         atomic_set(&fcport->free_sqes, total_sqe);
1307         return 0;
1308 out_free_conn:
1309         qed_ops->release_conn(qedf->cdev, fcport->handle);
1310 out:
1311         return rval;
1312 }
1313
1314 #define QEDF_TERM_BUFF_SIZE             10
1315 static void qedf_upload_connection(struct qedf_ctx *qedf,
1316         struct qedf_rport *fcport)
1317 {
1318         void *term_params;
1319         dma_addr_t term_params_dma;
1320
1321         /* Term params needs to be a DMA coherent buffer as qed shared the
1322          * physical DMA address with the firmware. The buffer may be used in
1323          * the receive path so we may eventually have to move this.
1324          */
1325         term_params = dma_alloc_coherent(&qedf->pdev->dev, QEDF_TERM_BUFF_SIZE,
1326                 &term_params_dma, GFP_KERNEL);
1327
1328         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Uploading connection "
1329                    "port_id=%06x.\n", fcport->rdata->ids.port_id);
1330
1331         qed_ops->destroy_conn(qedf->cdev, fcport->handle, term_params_dma);
1332         qed_ops->release_conn(qedf->cdev, fcport->handle);
1333
1334         dma_free_coherent(&qedf->pdev->dev, QEDF_TERM_BUFF_SIZE, term_params,
1335             term_params_dma);
1336 }
1337
1338 static void qedf_cleanup_fcport(struct qedf_ctx *qedf,
1339         struct qedf_rport *fcport)
1340 {
1341         struct fc_rport_priv *rdata = fcport->rdata;
1342
1343         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_CONN, "Cleaning up portid=%06x.\n",
1344             fcport->rdata->ids.port_id);
1345
1346         /* Flush any remaining i/o's before we upload the connection */
1347         qedf_flush_active_ios(fcport, -1);
1348
1349         if (test_and_clear_bit(QEDF_RPORT_SESSION_READY, &fcport->flags))
1350                 qedf_upload_connection(qedf, fcport);
1351         qedf_free_sq(qedf, fcport);
1352         fcport->rdata = NULL;
1353         fcport->qedf = NULL;
1354         kref_put(&rdata->kref, fc_rport_destroy);
1355 }
1356
1357 /**
1358  * This event_callback is called after successful completion of libfc
1359  * initiated target login. qedf can proceed with initiating the session
1360  * establishment.
1361  */
1362 static void qedf_rport_event_handler(struct fc_lport *lport,
1363                                 struct fc_rport_priv *rdata,
1364                                 enum fc_rport_event event)
1365 {
1366         struct qedf_ctx *qedf = lport_priv(lport);
1367         struct fc_rport *rport = rdata->rport;
1368         struct fc_rport_libfc_priv *rp;
1369         struct qedf_rport *fcport;
1370         u32 port_id;
1371         int rval;
1372         unsigned long flags;
1373
1374         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "event = %d, "
1375                    "port_id = 0x%x\n", event, rdata->ids.port_id);
1376
1377         switch (event) {
1378         case RPORT_EV_READY:
1379                 if (!rport) {
1380                         QEDF_WARN(&(qedf->dbg_ctx), "rport is NULL.\n");
1381                         break;
1382                 }
1383
1384                 rp = rport->dd_data;
1385                 fcport = (struct qedf_rport *)&rp[1];
1386                 fcport->qedf = qedf;
1387
1388                 if (atomic_read(&qedf->num_offloads) >= QEDF_MAX_SESSIONS) {
1389                         QEDF_ERR(&(qedf->dbg_ctx), "Not offloading "
1390                             "portid=0x%x as max number of offloaded sessions "
1391                             "reached.\n", rdata->ids.port_id);
1392                         return;
1393                 }
1394
1395                 /*
1396                  * Don't try to offload the session again. Can happen when we
1397                  * get an ADISC
1398                  */
1399                 if (test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
1400                         QEDF_WARN(&(qedf->dbg_ctx), "Session already "
1401                                    "offloaded, portid=0x%x.\n",
1402                                    rdata->ids.port_id);
1403                         return;
1404                 }
1405
1406                 if (rport->port_id == FC_FID_DIR_SERV) {
1407                         /*
1408                          * qedf_rport structure doesn't exist for
1409                          * directory server.
1410                          * We should not come here, as lport will
1411                          * take care of fabric login
1412                          */
1413                         QEDF_WARN(&(qedf->dbg_ctx), "rport struct does not "
1414                             "exist for dir server port_id=%x\n",
1415                             rdata->ids.port_id);
1416                         break;
1417                 }
1418
1419                 if (rdata->spp_type != FC_TYPE_FCP) {
1420                         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1421                             "Not offloading since spp type isn't FCP\n");
1422                         break;
1423                 }
1424                 if (!(rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET)) {
1425                         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1426                             "Not FCP target so not offloading\n");
1427                         break;
1428                 }
1429
1430                 /* Initial reference held on entry, so this can't fail */
1431                 kref_get(&rdata->kref);
1432                 fcport->rdata = rdata;
1433                 fcport->rport = rport;
1434
1435                 rval = qedf_alloc_sq(qedf, fcport);
1436                 if (rval) {
1437                         qedf_cleanup_fcport(qedf, fcport);
1438                         break;
1439                 }
1440
1441                 /* Set device type */
1442                 if (rdata->flags & FC_RP_FLAGS_RETRY &&
1443                     rdata->ids.roles & FC_RPORT_ROLE_FCP_TARGET &&
1444                     !(rdata->ids.roles & FC_RPORT_ROLE_FCP_INITIATOR)) {
1445                         fcport->dev_type = QEDF_RPORT_TYPE_TAPE;
1446                         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1447                             "portid=%06x is a TAPE device.\n",
1448                             rdata->ids.port_id);
1449                 } else {
1450                         fcport->dev_type = QEDF_RPORT_TYPE_DISK;
1451                 }
1452
1453                 rval = qedf_offload_connection(qedf, fcport);
1454                 if (rval) {
1455                         qedf_cleanup_fcport(qedf, fcport);
1456                         break;
1457                 }
1458
1459                 /* Add fcport to list of qedf_ctx list of offloaded ports */
1460                 spin_lock_irqsave(&qedf->hba_lock, flags);
1461                 list_add_rcu(&fcport->peers, &qedf->fcports);
1462                 spin_unlock_irqrestore(&qedf->hba_lock, flags);
1463
1464                 /*
1465                  * Set the session ready bit to let everyone know that this
1466                  * connection is ready for I/O
1467                  */
1468                 set_bit(QEDF_RPORT_SESSION_READY, &fcport->flags);
1469                 atomic_inc(&qedf->num_offloads);
1470
1471                 break;
1472         case RPORT_EV_LOGO:
1473         case RPORT_EV_FAILED:
1474         case RPORT_EV_STOP:
1475                 port_id = rdata->ids.port_id;
1476                 if (port_id == FC_FID_DIR_SERV)
1477                         break;
1478
1479                 if (!rport) {
1480                         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
1481                             "port_id=%x - rport notcreated Yet!!\n", port_id);
1482                         break;
1483                 }
1484                 rp = rport->dd_data;
1485                 /*
1486                  * Perform session upload. Note that rdata->peers is already
1487                  * removed from disc->rports list before we get this event.
1488                  */
1489                 fcport = (struct qedf_rport *)&rp[1];
1490
1491                 spin_lock_irqsave(&fcport->rport_lock, flags);
1492                 /* Only free this fcport if it is offloaded already */
1493                 if (test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags) &&
1494                     !test_bit(QEDF_RPORT_UPLOADING_CONNECTION,
1495                     &fcport->flags)) {
1496                         set_bit(QEDF_RPORT_UPLOADING_CONNECTION,
1497                                 &fcport->flags);
1498                         spin_unlock_irqrestore(&fcport->rport_lock, flags);
1499                         qedf_cleanup_fcport(qedf, fcport);
1500                         /*
1501                          * Remove fcport to list of qedf_ctx list of offloaded
1502                          * ports
1503                          */
1504                         spin_lock_irqsave(&qedf->hba_lock, flags);
1505                         list_del_rcu(&fcport->peers);
1506                         spin_unlock_irqrestore(&qedf->hba_lock, flags);
1507
1508                         clear_bit(QEDF_RPORT_UPLOADING_CONNECTION,
1509                             &fcport->flags);
1510                         atomic_dec(&qedf->num_offloads);
1511                 } else {
1512                         spin_unlock_irqrestore(&fcport->rport_lock, flags);
1513                 }
1514                 break;
1515
1516         case RPORT_EV_NONE:
1517                 break;
1518         }
1519 }
1520
1521 static void qedf_abort_io(struct fc_lport *lport)
1522 {
1523         /* NO-OP but need to fill in the template */
1524 }
1525
1526 static void qedf_fcp_cleanup(struct fc_lport *lport)
1527 {
1528         /*
1529          * NO-OP but need to fill in template to prevent a NULL
1530          * function pointer dereference during link down. I/Os
1531          * will be flushed when port is uploaded.
1532          */
1533 }
1534
1535 static struct libfc_function_template qedf_lport_template = {
1536         .frame_send             = qedf_xmit,
1537         .fcp_abort_io           = qedf_abort_io,
1538         .fcp_cleanup            = qedf_fcp_cleanup,
1539         .rport_event_callback   = qedf_rport_event_handler,
1540         .elsct_send             = qedf_elsct_send,
1541 };
1542
1543 static void qedf_fcoe_ctlr_setup(struct qedf_ctx *qedf)
1544 {
1545         fcoe_ctlr_init(&qedf->ctlr, FIP_MODE_AUTO);
1546
1547         qedf->ctlr.send = qedf_fip_send;
1548         qedf->ctlr.get_src_addr = qedf_get_src_mac;
1549         ether_addr_copy(qedf->ctlr.ctl_src_addr, qedf->mac);
1550 }
1551
1552 static void qedf_setup_fdmi(struct qedf_ctx *qedf)
1553 {
1554         struct fc_lport *lport = qedf->lport;
1555         struct fc_host_attrs *fc_host = shost_to_fc_host(lport->host);
1556         u8 buf[8];
1557         int i, pos;
1558
1559         /*
1560          * fdmi_enabled needs to be set for libfc to execute FDMI registration.
1561          */
1562         lport->fdmi_enabled = 1;
1563
1564         /*
1565          * Setup the necessary fc_host attributes to that will be used to fill
1566          * in the FDMI information.
1567          */
1568
1569         /* Get the PCI-e Device Serial Number Capability */
1570         pos = pci_find_ext_capability(qedf->pdev, PCI_EXT_CAP_ID_DSN);
1571         if (pos) {
1572                 pos += 4;
1573                 for (i = 0; i < 8; i++)
1574                         pci_read_config_byte(qedf->pdev, pos + i, &buf[i]);
1575
1576                 snprintf(fc_host->serial_number,
1577                     sizeof(fc_host->serial_number),
1578                     "%02X%02X%02X%02X%02X%02X%02X%02X",
1579                     buf[7], buf[6], buf[5], buf[4],
1580                     buf[3], buf[2], buf[1], buf[0]);
1581         } else
1582                 snprintf(fc_host->serial_number,
1583                     sizeof(fc_host->serial_number), "Unknown");
1584
1585         snprintf(fc_host->manufacturer,
1586             sizeof(fc_host->manufacturer), "%s", "Cavium Inc.");
1587
1588         snprintf(fc_host->model, sizeof(fc_host->model), "%s", "QL41000");
1589
1590         snprintf(fc_host->model_description, sizeof(fc_host->model_description),
1591             "%s", "QLogic FastLinQ QL41000 Series 10/25/40/50GGbE Controller"
1592             "(FCoE)");
1593
1594         snprintf(fc_host->hardware_version, sizeof(fc_host->hardware_version),
1595             "Rev %d", qedf->pdev->revision);
1596
1597         snprintf(fc_host->driver_version, sizeof(fc_host->driver_version),
1598             "%s", QEDF_VERSION);
1599
1600         snprintf(fc_host->firmware_version, sizeof(fc_host->firmware_version),
1601             "%d.%d.%d.%d", FW_MAJOR_VERSION, FW_MINOR_VERSION,
1602             FW_REVISION_VERSION, FW_ENGINEERING_VERSION);
1603 }
1604
1605 static int qedf_lport_setup(struct qedf_ctx *qedf)
1606 {
1607         struct fc_lport *lport = qedf->lport;
1608
1609         lport->link_up = 0;
1610         lport->max_retry_count = QEDF_FLOGI_RETRY_CNT;
1611         lport->max_rport_retry_count = QEDF_RPORT_RETRY_CNT;
1612         lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
1613             FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
1614         lport->boot_time = jiffies;
1615         lport->e_d_tov = 2 * 1000;
1616         lport->r_a_tov = 10 * 1000;
1617
1618         /* Set NPIV support */
1619         lport->does_npiv = 1;
1620         fc_host_max_npiv_vports(lport->host) = QEDF_MAX_NPIV;
1621
1622         fc_set_wwnn(lport, qedf->wwnn);
1623         fc_set_wwpn(lport, qedf->wwpn);
1624
1625         if (fcoe_libfc_config(lport, &qedf->ctlr, &qedf_lport_template, 0)) {
1626                 QEDF_ERR(&qedf->dbg_ctx,
1627                          "fcoe_libfc_config failed.\n");
1628                 return -ENOMEM;
1629         }
1630
1631         /* Allocate the exchange manager */
1632         fc_exch_mgr_alloc(lport, FC_CLASS_3, FCOE_PARAMS_NUM_TASKS,
1633                           0xfffe, NULL);
1634
1635         if (fc_lport_init_stats(lport))
1636                 return -ENOMEM;
1637
1638         /* Finish lport config */
1639         fc_lport_config(lport);
1640
1641         /* Set max frame size */
1642         fc_set_mfs(lport, QEDF_MFS);
1643         fc_host_maxframe_size(lport->host) = lport->mfs;
1644
1645         /* Set default dev_loss_tmo based on module parameter */
1646         fc_host_dev_loss_tmo(lport->host) = qedf_dev_loss_tmo;
1647
1648         /* Set symbolic node name */
1649         snprintf(fc_host_symbolic_name(lport->host), 256,
1650             "QLogic %s v%s", QEDF_MODULE_NAME, QEDF_VERSION);
1651
1652         qedf_setup_fdmi(qedf);
1653
1654         return 0;
1655 }
1656
1657 /*
1658  * NPIV functions
1659  */
1660
1661 static int qedf_vport_libfc_config(struct fc_vport *vport,
1662         struct fc_lport *lport)
1663 {
1664         lport->link_up = 0;
1665         lport->qfull = 0;
1666         lport->max_retry_count = QEDF_FLOGI_RETRY_CNT;
1667         lport->max_rport_retry_count = QEDF_RPORT_RETRY_CNT;
1668         lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
1669             FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
1670         lport->boot_time = jiffies;
1671         lport->e_d_tov = 2 * 1000;
1672         lport->r_a_tov = 10 * 1000;
1673         lport->does_npiv = 1; /* Temporary until we add NPIV support */
1674
1675         /* Allocate stats for vport */
1676         if (fc_lport_init_stats(lport))
1677                 return -ENOMEM;
1678
1679         /* Finish lport config */
1680         fc_lport_config(lport);
1681
1682         /* offload related configuration */
1683         lport->crc_offload = 0;
1684         lport->seq_offload = 0;
1685         lport->lro_enabled = 0;
1686         lport->lro_xid = 0;
1687         lport->lso_max = 0;
1688
1689         return 0;
1690 }
1691
1692 static int qedf_vport_create(struct fc_vport *vport, bool disabled)
1693 {
1694         struct Scsi_Host *shost = vport_to_shost(vport);
1695         struct fc_lport *n_port = shost_priv(shost);
1696         struct fc_lport *vn_port;
1697         struct qedf_ctx *base_qedf = lport_priv(n_port);
1698         struct qedf_ctx *vport_qedf;
1699
1700         char buf[32];
1701         int rc = 0;
1702
1703         rc = fcoe_validate_vport_create(vport);
1704         if (rc) {
1705                 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
1706                 QEDF_WARN(&(base_qedf->dbg_ctx), "Failed to create vport, "
1707                            "WWPN (0x%s) already exists.\n", buf);
1708                 goto err1;
1709         }
1710
1711         if (atomic_read(&base_qedf->link_state) != QEDF_LINK_UP) {
1712                 QEDF_WARN(&(base_qedf->dbg_ctx), "Cannot create vport "
1713                            "because link is not up.\n");
1714                 rc = -EIO;
1715                 goto err1;
1716         }
1717
1718         vn_port = libfc_vport_create(vport, sizeof(struct qedf_ctx));
1719         if (!vn_port) {
1720                 QEDF_WARN(&(base_qedf->dbg_ctx), "Could not create lport "
1721                            "for vport.\n");
1722                 rc = -ENOMEM;
1723                 goto err1;
1724         }
1725
1726         fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
1727         QEDF_ERR(&(base_qedf->dbg_ctx), "Creating NPIV port, WWPN=%s.\n",
1728             buf);
1729
1730         /* Copy some fields from base_qedf */
1731         vport_qedf = lport_priv(vn_port);
1732         memcpy(vport_qedf, base_qedf, sizeof(struct qedf_ctx));
1733
1734         /* Set qedf data specific to this vport */
1735         vport_qedf->lport = vn_port;
1736         /* Use same hba_lock as base_qedf */
1737         vport_qedf->hba_lock = base_qedf->hba_lock;
1738         vport_qedf->pdev = base_qedf->pdev;
1739         vport_qedf->cmd_mgr = base_qedf->cmd_mgr;
1740         init_completion(&vport_qedf->flogi_compl);
1741         INIT_LIST_HEAD(&vport_qedf->fcports);
1742
1743         rc = qedf_vport_libfc_config(vport, vn_port);
1744         if (rc) {
1745                 QEDF_ERR(&(base_qedf->dbg_ctx), "Could not allocate memory "
1746                     "for lport stats.\n");
1747                 goto err2;
1748         }
1749
1750         fc_set_wwnn(vn_port, vport->node_name);
1751         fc_set_wwpn(vn_port, vport->port_name);
1752         vport_qedf->wwnn = vn_port->wwnn;
1753         vport_qedf->wwpn = vn_port->wwpn;
1754
1755         vn_port->host->transportt = qedf_fc_vport_transport_template;
1756         vn_port->host->can_queue = FCOE_PARAMS_NUM_TASKS;
1757         vn_port->host->max_lun = qedf_max_lun;
1758         vn_port->host->sg_tablesize = QEDF_MAX_BDS_PER_CMD;
1759         vn_port->host->max_cmd_len = QEDF_MAX_CDB_LEN;
1760
1761         rc = scsi_add_host(vn_port->host, &vport->dev);
1762         if (rc) {
1763                 QEDF_WARN(&base_qedf->dbg_ctx,
1764                           "Error adding Scsi_Host rc=0x%x.\n", rc);
1765                 goto err2;
1766         }
1767
1768         /* Set default dev_loss_tmo based on module parameter */
1769         fc_host_dev_loss_tmo(vn_port->host) = qedf_dev_loss_tmo;
1770
1771         /* Init libfc stuffs */
1772         memcpy(&vn_port->tt, &qedf_lport_template,
1773                 sizeof(qedf_lport_template));
1774         fc_exch_init(vn_port);
1775         fc_elsct_init(vn_port);
1776         fc_lport_init(vn_port);
1777         fc_disc_init(vn_port);
1778         fc_disc_config(vn_port, vn_port);
1779
1780
1781         /* Allocate the exchange manager */
1782         shost = vport_to_shost(vport);
1783         n_port = shost_priv(shost);
1784         fc_exch_mgr_list_clone(n_port, vn_port);
1785
1786         /* Set max frame size */
1787         fc_set_mfs(vn_port, QEDF_MFS);
1788
1789         fc_host_port_type(vn_port->host) = FC_PORTTYPE_UNKNOWN;
1790
1791         if (disabled) {
1792                 fc_vport_set_state(vport, FC_VPORT_DISABLED);
1793         } else {
1794                 vn_port->boot_time = jiffies;
1795                 fc_fabric_login(vn_port);
1796                 fc_vport_setlink(vn_port);
1797         }
1798
1799         QEDF_INFO(&(base_qedf->dbg_ctx), QEDF_LOG_NPIV, "vn_port=%p.\n",
1800                    vn_port);
1801
1802         /* Set up debug context for vport */
1803         vport_qedf->dbg_ctx.host_no = vn_port->host->host_no;
1804         vport_qedf->dbg_ctx.pdev = base_qedf->pdev;
1805
1806 err2:
1807         scsi_host_put(vn_port->host);
1808 err1:
1809         return rc;
1810 }
1811
1812 static int qedf_vport_destroy(struct fc_vport *vport)
1813 {
1814         struct Scsi_Host *shost = vport_to_shost(vport);
1815         struct fc_lport *n_port = shost_priv(shost);
1816         struct fc_lport *vn_port = vport->dd_data;
1817         struct qedf_ctx *qedf = lport_priv(vn_port);
1818
1819         if (!qedf) {
1820                 QEDF_ERR(NULL, "qedf is NULL.\n");
1821                 goto out;
1822         }
1823
1824         /* Set unloading bit on vport qedf_ctx to prevent more I/O */
1825         set_bit(QEDF_UNLOADING, &qedf->flags);
1826
1827         mutex_lock(&n_port->lp_mutex);
1828         list_del(&vn_port->list);
1829         mutex_unlock(&n_port->lp_mutex);
1830
1831         fc_fabric_logoff(vn_port);
1832         fc_lport_destroy(vn_port);
1833
1834         /* Detach from scsi-ml */
1835         fc_remove_host(vn_port->host);
1836         scsi_remove_host(vn_port->host);
1837
1838         /*
1839          * Only try to release the exchange manager if the vn_port
1840          * configuration is complete.
1841          */
1842         if (vn_port->state == LPORT_ST_READY)
1843                 fc_exch_mgr_free(vn_port);
1844
1845         /* Free memory used by statistical counters */
1846         fc_lport_free_stats(vn_port);
1847
1848         /* Release Scsi_Host */
1849         if (vn_port->host)
1850                 scsi_host_put(vn_port->host);
1851
1852 out:
1853         return 0;
1854 }
1855
1856 static int qedf_vport_disable(struct fc_vport *vport, bool disable)
1857 {
1858         struct fc_lport *lport = vport->dd_data;
1859
1860         if (disable) {
1861                 fc_vport_set_state(vport, FC_VPORT_DISABLED);
1862                 fc_fabric_logoff(lport);
1863         } else {
1864                 lport->boot_time = jiffies;
1865                 fc_fabric_login(lport);
1866                 fc_vport_setlink(lport);
1867         }
1868         return 0;
1869 }
1870
1871 /*
1872  * During removal we need to wait for all the vports associated with a port
1873  * to be destroyed so we avoid a race condition where libfc is still trying
1874  * to reap vports while the driver remove function has already reaped the
1875  * driver contexts associated with the physical port.
1876  */
1877 static void qedf_wait_for_vport_destroy(struct qedf_ctx *qedf)
1878 {
1879         struct fc_host_attrs *fc_host = shost_to_fc_host(qedf->lport->host);
1880
1881         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_NPIV,
1882             "Entered.\n");
1883         while (fc_host->npiv_vports_inuse > 0) {
1884                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_NPIV,
1885                     "Waiting for all vports to be reaped.\n");
1886                 msleep(1000);
1887         }
1888 }
1889
1890 /**
1891  * qedf_fcoe_reset - Resets the fcoe
1892  *
1893  * @shost: shost the reset is from
1894  *
1895  * Returns: always 0
1896  */
1897 static int qedf_fcoe_reset(struct Scsi_Host *shost)
1898 {
1899         struct fc_lport *lport = shost_priv(shost);
1900
1901         qedf_ctx_soft_reset(lport);
1902         return 0;
1903 }
1904
1905 static struct fc_host_statistics *qedf_fc_get_host_stats(struct Scsi_Host
1906         *shost)
1907 {
1908         struct fc_host_statistics *qedf_stats;
1909         struct fc_lport *lport = shost_priv(shost);
1910         struct qedf_ctx *qedf = lport_priv(lport);
1911         struct qed_fcoe_stats *fw_fcoe_stats;
1912
1913         qedf_stats = fc_get_host_stats(shost);
1914
1915         /* We don't collect offload stats for specific NPIV ports */
1916         if (lport->vport)
1917                 goto out;
1918
1919         fw_fcoe_stats = kmalloc(sizeof(struct qed_fcoe_stats), GFP_KERNEL);
1920         if (!fw_fcoe_stats) {
1921                 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate memory for "
1922                     "fw_fcoe_stats.\n");
1923                 goto out;
1924         }
1925
1926         mutex_lock(&qedf->stats_mutex);
1927
1928         /* Query firmware for offload stats */
1929         qed_ops->get_stats(qedf->cdev, fw_fcoe_stats);
1930
1931         /*
1932          * The expectation is that we add our offload stats to the stats
1933          * being maintained by libfc each time the fc_get_host_status callback
1934          * is invoked. The additions are not carried over for each call to
1935          * the fc_get_host_stats callback.
1936          */
1937         qedf_stats->tx_frames += fw_fcoe_stats->fcoe_tx_data_pkt_cnt +
1938             fw_fcoe_stats->fcoe_tx_xfer_pkt_cnt +
1939             fw_fcoe_stats->fcoe_tx_other_pkt_cnt;
1940         qedf_stats->rx_frames += fw_fcoe_stats->fcoe_rx_data_pkt_cnt +
1941             fw_fcoe_stats->fcoe_rx_xfer_pkt_cnt +
1942             fw_fcoe_stats->fcoe_rx_other_pkt_cnt;
1943         qedf_stats->fcp_input_megabytes +=
1944             do_div(fw_fcoe_stats->fcoe_rx_byte_cnt, 1000000);
1945         qedf_stats->fcp_output_megabytes +=
1946             do_div(fw_fcoe_stats->fcoe_tx_byte_cnt, 1000000);
1947         qedf_stats->rx_words += fw_fcoe_stats->fcoe_rx_byte_cnt / 4;
1948         qedf_stats->tx_words += fw_fcoe_stats->fcoe_tx_byte_cnt / 4;
1949         qedf_stats->invalid_crc_count +=
1950             fw_fcoe_stats->fcoe_silent_drop_pkt_crc_error_cnt;
1951         qedf_stats->dumped_frames =
1952             fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt;
1953         qedf_stats->error_frames +=
1954             fw_fcoe_stats->fcoe_silent_drop_total_pkt_cnt;
1955         qedf_stats->fcp_input_requests += qedf->input_requests;
1956         qedf_stats->fcp_output_requests += qedf->output_requests;
1957         qedf_stats->fcp_control_requests += qedf->control_requests;
1958         qedf_stats->fcp_packet_aborts += qedf->packet_aborts;
1959         qedf_stats->fcp_frame_alloc_failures += qedf->alloc_failures;
1960
1961         mutex_unlock(&qedf->stats_mutex);
1962         kfree(fw_fcoe_stats);
1963 out:
1964         return qedf_stats;
1965 }
1966
1967 static struct fc_function_template qedf_fc_transport_fn = {
1968         .show_host_node_name = 1,
1969         .show_host_port_name = 1,
1970         .show_host_supported_classes = 1,
1971         .show_host_supported_fc4s = 1,
1972         .show_host_active_fc4s = 1,
1973         .show_host_maxframe_size = 1,
1974
1975         .show_host_port_id = 1,
1976         .show_host_supported_speeds = 1,
1977         .get_host_speed = fc_get_host_speed,
1978         .show_host_speed = 1,
1979         .show_host_port_type = 1,
1980         .get_host_port_state = fc_get_host_port_state,
1981         .show_host_port_state = 1,
1982         .show_host_symbolic_name = 1,
1983
1984         /*
1985          * Tell FC transport to allocate enough space to store the backpointer
1986          * for the associate qedf_rport struct.
1987          */
1988         .dd_fcrport_size = (sizeof(struct fc_rport_libfc_priv) +
1989                                 sizeof(struct qedf_rport)),
1990         .show_rport_maxframe_size = 1,
1991         .show_rport_supported_classes = 1,
1992         .show_host_fabric_name = 1,
1993         .show_starget_node_name = 1,
1994         .show_starget_port_name = 1,
1995         .show_starget_port_id = 1,
1996         .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
1997         .show_rport_dev_loss_tmo = 1,
1998         .get_fc_host_stats = qedf_fc_get_host_stats,
1999         .issue_fc_host_lip = qedf_fcoe_reset,
2000         .vport_create = qedf_vport_create,
2001         .vport_delete = qedf_vport_destroy,
2002         .vport_disable = qedf_vport_disable,
2003         .bsg_request = fc_lport_bsg_request,
2004 };
2005
2006 static struct fc_function_template qedf_fc_vport_transport_fn = {
2007         .show_host_node_name = 1,
2008         .show_host_port_name = 1,
2009         .show_host_supported_classes = 1,
2010         .show_host_supported_fc4s = 1,
2011         .show_host_active_fc4s = 1,
2012         .show_host_maxframe_size = 1,
2013         .show_host_port_id = 1,
2014         .show_host_supported_speeds = 1,
2015         .get_host_speed = fc_get_host_speed,
2016         .show_host_speed = 1,
2017         .show_host_port_type = 1,
2018         .get_host_port_state = fc_get_host_port_state,
2019         .show_host_port_state = 1,
2020         .show_host_symbolic_name = 1,
2021         .dd_fcrport_size = (sizeof(struct fc_rport_libfc_priv) +
2022                                 sizeof(struct qedf_rport)),
2023         .show_rport_maxframe_size = 1,
2024         .show_rport_supported_classes = 1,
2025         .show_host_fabric_name = 1,
2026         .show_starget_node_name = 1,
2027         .show_starget_port_name = 1,
2028         .show_starget_port_id = 1,
2029         .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
2030         .show_rport_dev_loss_tmo = 1,
2031         .get_fc_host_stats = fc_get_host_stats,
2032         .issue_fc_host_lip = qedf_fcoe_reset,
2033         .bsg_request = fc_lport_bsg_request,
2034 };
2035
2036 static bool qedf_fp_has_work(struct qedf_fastpath *fp)
2037 {
2038         struct qedf_ctx *qedf = fp->qedf;
2039         struct global_queue *que;
2040         struct qed_sb_info *sb_info = fp->sb_info;
2041         struct status_block_e4 *sb = sb_info->sb_virt;
2042         u16 prod_idx;
2043
2044         /* Get the pointer to the global CQ this completion is on */
2045         que = qedf->global_queues[fp->sb_id];
2046
2047         /* Be sure all responses have been written to PI */
2048         rmb();
2049
2050         /* Get the current firmware producer index */
2051         prod_idx = sb->pi_array[QEDF_FCOE_PARAMS_GL_RQ_PI];
2052
2053         return (que->cq_prod_idx != prod_idx);
2054 }
2055
2056 /*
2057  * Interrupt handler code.
2058  */
2059
2060 /* Process completion queue and copy CQE contents for deferred processesing
2061  *
2062  * Return true if we should wake the I/O thread, false if not.
2063  */
2064 static bool qedf_process_completions(struct qedf_fastpath *fp)
2065 {
2066         struct qedf_ctx *qedf = fp->qedf;
2067         struct qed_sb_info *sb_info = fp->sb_info;
2068         struct status_block_e4 *sb = sb_info->sb_virt;
2069         struct global_queue *que;
2070         u16 prod_idx;
2071         struct fcoe_cqe *cqe;
2072         struct qedf_io_work *io_work;
2073         int num_handled = 0;
2074         unsigned int cpu;
2075         struct qedf_ioreq *io_req = NULL;
2076         u16 xid;
2077         u16 new_cqes;
2078         u32 comp_type;
2079
2080         /* Get the current firmware producer index */
2081         prod_idx = sb->pi_array[QEDF_FCOE_PARAMS_GL_RQ_PI];
2082
2083         /* Get the pointer to the global CQ this completion is on */
2084         que = qedf->global_queues[fp->sb_id];
2085
2086         /* Calculate the amount of new elements since last processing */
2087         new_cqes = (prod_idx >= que->cq_prod_idx) ?
2088             (prod_idx - que->cq_prod_idx) :
2089             0x10000 - que->cq_prod_idx + prod_idx;
2090
2091         /* Save producer index */
2092         que->cq_prod_idx = prod_idx;
2093
2094         while (new_cqes) {
2095                 fp->completions++;
2096                 num_handled++;
2097                 cqe = &que->cq[que->cq_cons_idx];
2098
2099                 comp_type = (cqe->cqe_data >> FCOE_CQE_CQE_TYPE_SHIFT) &
2100                     FCOE_CQE_CQE_TYPE_MASK;
2101
2102                 /*
2103                  * Process unsolicited CQEs directly in the interrupt handler
2104                  * sine we need the fastpath ID
2105                  */
2106                 if (comp_type == FCOE_UNSOLIC_CQE_TYPE) {
2107                         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_UNSOL,
2108                            "Unsolicated CQE.\n");
2109                         qedf_process_unsol_compl(qedf, fp->sb_id, cqe);
2110                         /*
2111                          * Don't add a work list item.  Increment consumer
2112                          * consumer index and move on.
2113                          */
2114                         goto inc_idx;
2115                 }
2116
2117                 xid = cqe->cqe_data & FCOE_CQE_TASK_ID_MASK;
2118                 io_req = &qedf->cmd_mgr->cmds[xid];
2119
2120                 /*
2121                  * Figure out which percpu thread we should queue this I/O
2122                  * on.
2123                  */
2124                 if (!io_req)
2125                         /* If there is not io_req assocated with this CQE
2126                          * just queue it on CPU 0
2127                          */
2128                         cpu = 0;
2129                 else {
2130                         cpu = io_req->cpu;
2131                         io_req->int_cpu = smp_processor_id();
2132                 }
2133
2134                 io_work = mempool_alloc(qedf->io_mempool, GFP_ATOMIC);
2135                 if (!io_work) {
2136                         QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate "
2137                                    "work for I/O completion.\n");
2138                         continue;
2139                 }
2140                 memset(io_work, 0, sizeof(struct qedf_io_work));
2141
2142                 INIT_WORK(&io_work->work, qedf_fp_io_handler);
2143
2144                 /* Copy contents of CQE for deferred processing */
2145                 memcpy(&io_work->cqe, cqe, sizeof(struct fcoe_cqe));
2146
2147                 io_work->qedf = fp->qedf;
2148                 io_work->fp = NULL; /* Only used for unsolicited frames */
2149
2150                 queue_work_on(cpu, qedf_io_wq, &io_work->work);
2151
2152 inc_idx:
2153                 que->cq_cons_idx++;
2154                 if (que->cq_cons_idx == fp->cq_num_entries)
2155                         que->cq_cons_idx = 0;
2156                 new_cqes--;
2157         }
2158
2159         return true;
2160 }
2161
2162
2163 /* MSI-X fastpath handler code */
2164 static irqreturn_t qedf_msix_handler(int irq, void *dev_id)
2165 {
2166         struct qedf_fastpath *fp = dev_id;
2167
2168         if (!fp) {
2169                 QEDF_ERR(NULL, "fp is null.\n");
2170                 return IRQ_HANDLED;
2171         }
2172         if (!fp->sb_info) {
2173                 QEDF_ERR(NULL, "fp->sb_info in null.");
2174                 return IRQ_HANDLED;
2175         }
2176
2177         /*
2178          * Disable interrupts for this status block while we process new
2179          * completions
2180          */
2181         qed_sb_ack(fp->sb_info, IGU_INT_DISABLE, 0 /*do not update*/);
2182
2183         while (1) {
2184                 qedf_process_completions(fp);
2185
2186                 if (qedf_fp_has_work(fp) == 0) {
2187                         /* Update the sb information */
2188                         qed_sb_update_sb_idx(fp->sb_info);
2189
2190                         /* Check for more work */
2191                         rmb();
2192
2193                         if (qedf_fp_has_work(fp) == 0) {
2194                                 /* Re-enable interrupts */
2195                                 qed_sb_ack(fp->sb_info, IGU_INT_ENABLE, 1);
2196                                 return IRQ_HANDLED;
2197                         }
2198                 }
2199         }
2200
2201         /* Do we ever want to break out of above loop? */
2202         return IRQ_HANDLED;
2203 }
2204
2205 /* simd handler for MSI/INTa */
2206 static void qedf_simd_int_handler(void *cookie)
2207 {
2208         /* Cookie is qedf_ctx struct */
2209         struct qedf_ctx *qedf = (struct qedf_ctx *)cookie;
2210
2211         QEDF_WARN(&(qedf->dbg_ctx), "qedf=%p.\n", qedf);
2212 }
2213
2214 #define QEDF_SIMD_HANDLER_NUM           0
2215 static void qedf_sync_free_irqs(struct qedf_ctx *qedf)
2216 {
2217         int i;
2218
2219         if (qedf->int_info.msix_cnt) {
2220                 for (i = 0; i < qedf->int_info.used_cnt; i++) {
2221                         synchronize_irq(qedf->int_info.msix[i].vector);
2222                         irq_set_affinity_hint(qedf->int_info.msix[i].vector,
2223                             NULL);
2224                         irq_set_affinity_notifier(qedf->int_info.msix[i].vector,
2225                             NULL);
2226                         free_irq(qedf->int_info.msix[i].vector,
2227                             &qedf->fp_array[i]);
2228                 }
2229         } else
2230                 qed_ops->common->simd_handler_clean(qedf->cdev,
2231                     QEDF_SIMD_HANDLER_NUM);
2232
2233         qedf->int_info.used_cnt = 0;
2234         qed_ops->common->set_fp_int(qedf->cdev, 0);
2235 }
2236
2237 static int qedf_request_msix_irq(struct qedf_ctx *qedf)
2238 {
2239         int i, rc, cpu;
2240
2241         cpu = cpumask_first(cpu_online_mask);
2242         for (i = 0; i < qedf->num_queues; i++) {
2243                 rc = request_irq(qedf->int_info.msix[i].vector,
2244                     qedf_msix_handler, 0, "qedf", &qedf->fp_array[i]);
2245
2246                 if (rc) {
2247                         QEDF_WARN(&(qedf->dbg_ctx), "request_irq failed.\n");
2248                         qedf_sync_free_irqs(qedf);
2249                         return rc;
2250                 }
2251
2252                 qedf->int_info.used_cnt++;
2253                 rc = irq_set_affinity_hint(qedf->int_info.msix[i].vector,
2254                     get_cpu_mask(cpu));
2255                 cpu = cpumask_next(cpu, cpu_online_mask);
2256         }
2257
2258         return 0;
2259 }
2260
2261 static int qedf_setup_int(struct qedf_ctx *qedf)
2262 {
2263         int rc = 0;
2264
2265         /*
2266          * Learn interrupt configuration
2267          */
2268         rc = qed_ops->common->set_fp_int(qedf->cdev, num_online_cpus());
2269         if (rc <= 0)
2270                 return 0;
2271
2272         rc  = qed_ops->common->get_fp_int(qedf->cdev, &qedf->int_info);
2273         if (rc)
2274                 return 0;
2275
2276         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Number of msix_cnt = "
2277                    "0x%x num of cpus = 0x%x\n", qedf->int_info.msix_cnt,
2278                    num_online_cpus());
2279
2280         if (qedf->int_info.msix_cnt)
2281                 return qedf_request_msix_irq(qedf);
2282
2283         qed_ops->common->simd_handler_config(qedf->cdev, &qedf,
2284             QEDF_SIMD_HANDLER_NUM, qedf_simd_int_handler);
2285         qedf->int_info.used_cnt = 1;
2286
2287         QEDF_ERR(&qedf->dbg_ctx,
2288                  "Cannot load driver due to a lack of MSI-X vectors.\n");
2289         return -EINVAL;
2290 }
2291
2292 /* Main function for libfc frame reception */
2293 static void qedf_recv_frame(struct qedf_ctx *qedf,
2294         struct sk_buff *skb)
2295 {
2296         u32 fr_len;
2297         struct fc_lport *lport;
2298         struct fc_frame_header *fh;
2299         struct fcoe_crc_eof crc_eof;
2300         struct fc_frame *fp;
2301         u8 *mac = NULL;
2302         u8 *dest_mac = NULL;
2303         struct fcoe_hdr *hp;
2304         struct qedf_rport *fcport;
2305         struct fc_lport *vn_port;
2306         u32 f_ctl;
2307
2308         lport = qedf->lport;
2309         if (lport == NULL || lport->state == LPORT_ST_DISABLED) {
2310                 QEDF_WARN(NULL, "Invalid lport struct or lport disabled.\n");
2311                 kfree_skb(skb);
2312                 return;
2313         }
2314
2315         if (skb_is_nonlinear(skb))
2316                 skb_linearize(skb);
2317         mac = eth_hdr(skb)->h_source;
2318         dest_mac = eth_hdr(skb)->h_dest;
2319
2320         /* Pull the header */
2321         hp = (struct fcoe_hdr *)skb->data;
2322         fh = (struct fc_frame_header *) skb_transport_header(skb);
2323         skb_pull(skb, sizeof(struct fcoe_hdr));
2324         fr_len = skb->len - sizeof(struct fcoe_crc_eof);
2325
2326         fp = (struct fc_frame *)skb;
2327         fc_frame_init(fp);
2328         fr_dev(fp) = lport;
2329         fr_sof(fp) = hp->fcoe_sof;
2330         if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
2331                 kfree_skb(skb);
2332                 return;
2333         }
2334         fr_eof(fp) = crc_eof.fcoe_eof;
2335         fr_crc(fp) = crc_eof.fcoe_crc32;
2336         if (pskb_trim(skb, fr_len)) {
2337                 kfree_skb(skb);
2338                 return;
2339         }
2340
2341         fh = fc_frame_header_get(fp);
2342
2343         /*
2344          * Invalid frame filters.
2345          */
2346
2347         if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
2348             fh->fh_type == FC_TYPE_FCP) {
2349                 /* Drop FCP data. We dont this in L2 path */
2350                 kfree_skb(skb);
2351                 return;
2352         }
2353         if (fh->fh_r_ctl == FC_RCTL_ELS_REQ &&
2354             fh->fh_type == FC_TYPE_ELS) {
2355                 switch (fc_frame_payload_op(fp)) {
2356                 case ELS_LOGO:
2357                         if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
2358                                 /* drop non-FIP LOGO */
2359                                 kfree_skb(skb);
2360                                 return;
2361                         }
2362                         break;
2363                 }
2364         }
2365
2366         if (fh->fh_r_ctl == FC_RCTL_BA_ABTS) {
2367                 /* Drop incoming ABTS */
2368                 kfree_skb(skb);
2369                 return;
2370         }
2371
2372         if (ntoh24(&dest_mac[3]) != ntoh24(fh->fh_d_id)) {
2373                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
2374                     "FC frame d_id mismatch with MAC %pM.\n", dest_mac);
2375                 kfree_skb(skb);
2376                 return;
2377         }
2378
2379         if (qedf->ctlr.state) {
2380                 if (!ether_addr_equal(mac, qedf->ctlr.dest_addr)) {
2381                         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
2382                             "Wrong source address: mac:%pM dest_addr:%pM.\n",
2383                             mac, qedf->ctlr.dest_addr);
2384                         kfree_skb(skb);
2385                         return;
2386                 }
2387         }
2388
2389         vn_port = fc_vport_id_lookup(lport, ntoh24(fh->fh_d_id));
2390
2391         /*
2392          * If the destination ID from the frame header does not match what we
2393          * have on record for lport and the search for a NPIV port came up
2394          * empty then this is not addressed to our port so simply drop it.
2395          */
2396         if (lport->port_id != ntoh24(fh->fh_d_id) && !vn_port) {
2397                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
2398                     "Dropping frame due to destination mismatch: lport->port_id=%x fh->d_id=%x.\n",
2399                     lport->port_id, ntoh24(fh->fh_d_id));
2400                 kfree_skb(skb);
2401                 return;
2402         }
2403
2404         f_ctl = ntoh24(fh->fh_f_ctl);
2405         if ((fh->fh_type == FC_TYPE_BLS) && (f_ctl & FC_FC_SEQ_CTX) &&
2406             (f_ctl & FC_FC_EX_CTX)) {
2407                 /* Drop incoming ABTS response that has both SEQ/EX CTX set */
2408                 kfree_skb(skb);
2409                 return;
2410         }
2411
2412         /*
2413          * If a connection is uploading, drop incoming FCoE frames as there
2414          * is a small window where we could try to return a frame while libfc
2415          * is trying to clean things up.
2416          */
2417
2418         /* Get fcport associated with d_id if it exists */
2419         fcport = qedf_fcport_lookup(qedf, ntoh24(fh->fh_d_id));
2420
2421         if (fcport && test_bit(QEDF_RPORT_UPLOADING_CONNECTION,
2422             &fcport->flags)) {
2423                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2,
2424                     "Connection uploading, dropping fp=%p.\n", fp);
2425                 kfree_skb(skb);
2426                 return;
2427         }
2428
2429         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_LL2, "FCoE frame receive: "
2430             "skb=%p fp=%p src=%06x dest=%06x r_ctl=%x fh_type=%x.\n", skb, fp,
2431             ntoh24(fh->fh_s_id), ntoh24(fh->fh_d_id), fh->fh_r_ctl,
2432             fh->fh_type);
2433         if (qedf_dump_frames)
2434                 print_hex_dump(KERN_WARNING, "fcoe: ", DUMP_PREFIX_OFFSET, 16,
2435                     1, skb->data, skb->len, false);
2436         fc_exch_recv(lport, fp);
2437 }
2438
2439 static void qedf_ll2_process_skb(struct work_struct *work)
2440 {
2441         struct qedf_skb_work *skb_work =
2442             container_of(work, struct qedf_skb_work, work);
2443         struct qedf_ctx *qedf = skb_work->qedf;
2444         struct sk_buff *skb = skb_work->skb;
2445         struct ethhdr *eh;
2446
2447         if (!qedf) {
2448                 QEDF_ERR(NULL, "qedf is NULL\n");
2449                 goto err_out;
2450         }
2451
2452         eh = (struct ethhdr *)skb->data;
2453
2454         /* Undo VLAN encapsulation */
2455         if (eh->h_proto == htons(ETH_P_8021Q)) {
2456                 memmove((u8 *)eh + VLAN_HLEN, eh, ETH_ALEN * 2);
2457                 eh = skb_pull(skb, VLAN_HLEN);
2458                 skb_reset_mac_header(skb);
2459         }
2460
2461         /*
2462          * Process either a FIP frame or FCoE frame based on the
2463          * protocol value.  If it's not either just drop the
2464          * frame.
2465          */
2466         if (eh->h_proto == htons(ETH_P_FIP)) {
2467                 qedf_fip_recv(qedf, skb);
2468                 goto out;
2469         } else if (eh->h_proto == htons(ETH_P_FCOE)) {
2470                 __skb_pull(skb, ETH_HLEN);
2471                 qedf_recv_frame(qedf, skb);
2472                 goto out;
2473         } else
2474                 goto err_out;
2475
2476 err_out:
2477         kfree_skb(skb);
2478 out:
2479         kfree(skb_work);
2480         return;
2481 }
2482
2483 static int qedf_ll2_rx(void *cookie, struct sk_buff *skb,
2484         u32 arg1, u32 arg2)
2485 {
2486         struct qedf_ctx *qedf = (struct qedf_ctx *)cookie;
2487         struct qedf_skb_work *skb_work;
2488
2489         if (atomic_read(&qedf->link_state) == QEDF_LINK_DOWN) {
2490                 QEDF_INFO(&qedf->dbg_ctx, QEDF_LOG_LL2,
2491                           "Dropping frame as link state is down.\n");
2492                 kfree_skb(skb);
2493                 return 0;
2494         }
2495
2496         skb_work = kzalloc(sizeof(struct qedf_skb_work), GFP_ATOMIC);
2497         if (!skb_work) {
2498                 QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate skb_work so "
2499                            "dropping frame.\n");
2500                 kfree_skb(skb);
2501                 return 0;
2502         }
2503
2504         INIT_WORK(&skb_work->work, qedf_ll2_process_skb);
2505         skb_work->skb = skb;
2506         skb_work->qedf = qedf;
2507         queue_work(qedf->ll2_recv_wq, &skb_work->work);
2508
2509         return 0;
2510 }
2511
2512 static struct qed_ll2_cb_ops qedf_ll2_cb_ops = {
2513         .rx_cb = qedf_ll2_rx,
2514         .tx_cb = NULL,
2515 };
2516
2517 /* Main thread to process I/O completions */
2518 void qedf_fp_io_handler(struct work_struct *work)
2519 {
2520         struct qedf_io_work *io_work =
2521             container_of(work, struct qedf_io_work, work);
2522         u32 comp_type;
2523
2524         /*
2525          * Deferred part of unsolicited CQE sends
2526          * frame to libfc.
2527          */
2528         comp_type = (io_work->cqe.cqe_data >>
2529             FCOE_CQE_CQE_TYPE_SHIFT) &
2530             FCOE_CQE_CQE_TYPE_MASK;
2531         if (comp_type == FCOE_UNSOLIC_CQE_TYPE &&
2532             io_work->fp)
2533                 fc_exch_recv(io_work->qedf->lport, io_work->fp);
2534         else
2535                 qedf_process_cqe(io_work->qedf, &io_work->cqe);
2536
2537         kfree(io_work);
2538 }
2539
2540 static int qedf_alloc_and_init_sb(struct qedf_ctx *qedf,
2541         struct qed_sb_info *sb_info, u16 sb_id)
2542 {
2543         struct status_block_e4 *sb_virt;
2544         dma_addr_t sb_phys;
2545         int ret;
2546
2547         sb_virt = dma_alloc_coherent(&qedf->pdev->dev,
2548             sizeof(struct status_block_e4), &sb_phys, GFP_KERNEL);
2549
2550         if (!sb_virt) {
2551                 QEDF_ERR(&(qedf->dbg_ctx), "Status block allocation failed "
2552                           "for id = %d.\n", sb_id);
2553                 return -ENOMEM;
2554         }
2555
2556         ret = qed_ops->common->sb_init(qedf->cdev, sb_info, sb_virt, sb_phys,
2557             sb_id, QED_SB_TYPE_STORAGE);
2558
2559         if (ret) {
2560                 QEDF_ERR(&(qedf->dbg_ctx), "Status block initialization "
2561                           "failed for id = %d.\n", sb_id);
2562                 return ret;
2563         }
2564
2565         return 0;
2566 }
2567
2568 static void qedf_free_sb(struct qedf_ctx *qedf, struct qed_sb_info *sb_info)
2569 {
2570         if (sb_info->sb_virt)
2571                 dma_free_coherent(&qedf->pdev->dev, sizeof(*sb_info->sb_virt),
2572                     (void *)sb_info->sb_virt, sb_info->sb_phys);
2573 }
2574
2575 static void qedf_destroy_sb(struct qedf_ctx *qedf)
2576 {
2577         int id;
2578         struct qedf_fastpath *fp = NULL;
2579
2580         for (id = 0; id < qedf->num_queues; id++) {
2581                 fp = &(qedf->fp_array[id]);
2582                 if (fp->sb_id == QEDF_SB_ID_NULL)
2583                         break;
2584                 qedf_free_sb(qedf, fp->sb_info);
2585                 kfree(fp->sb_info);
2586         }
2587         kfree(qedf->fp_array);
2588 }
2589
2590 static int qedf_prepare_sb(struct qedf_ctx *qedf)
2591 {
2592         int id;
2593         struct qedf_fastpath *fp;
2594         int ret;
2595
2596         qedf->fp_array =
2597             kcalloc(qedf->num_queues, sizeof(struct qedf_fastpath),
2598                 GFP_KERNEL);
2599
2600         if (!qedf->fp_array) {
2601                 QEDF_ERR(&(qedf->dbg_ctx), "fastpath array allocation "
2602                           "failed.\n");
2603                 return -ENOMEM;
2604         }
2605
2606         for (id = 0; id < qedf->num_queues; id++) {
2607                 fp = &(qedf->fp_array[id]);
2608                 fp->sb_id = QEDF_SB_ID_NULL;
2609                 fp->sb_info = kcalloc(1, sizeof(*fp->sb_info), GFP_KERNEL);
2610                 if (!fp->sb_info) {
2611                         QEDF_ERR(&(qedf->dbg_ctx), "SB info struct "
2612                                   "allocation failed.\n");
2613                         goto err;
2614                 }
2615                 ret = qedf_alloc_and_init_sb(qedf, fp->sb_info, id);
2616                 if (ret) {
2617                         QEDF_ERR(&(qedf->dbg_ctx), "SB allocation and "
2618                                   "initialization failed.\n");
2619                         goto err;
2620                 }
2621                 fp->sb_id = id;
2622                 fp->qedf = qedf;
2623                 fp->cq_num_entries =
2624                     qedf->global_queues[id]->cq_mem_size /
2625                     sizeof(struct fcoe_cqe);
2626         }
2627 err:
2628         return 0;
2629 }
2630
2631 void qedf_process_cqe(struct qedf_ctx *qedf, struct fcoe_cqe *cqe)
2632 {
2633         u16 xid;
2634         struct qedf_ioreq *io_req;
2635         struct qedf_rport *fcport;
2636         u32 comp_type;
2637
2638         comp_type = (cqe->cqe_data >> FCOE_CQE_CQE_TYPE_SHIFT) &
2639             FCOE_CQE_CQE_TYPE_MASK;
2640
2641         xid = cqe->cqe_data & FCOE_CQE_TASK_ID_MASK;
2642         io_req = &qedf->cmd_mgr->cmds[xid];
2643
2644         /* Completion not for a valid I/O anymore so just return */
2645         if (!io_req)
2646                 return;
2647
2648         fcport = io_req->fcport;
2649
2650         if (fcport == NULL) {
2651                 QEDF_ERR(&(qedf->dbg_ctx), "fcport is NULL.\n");
2652                 return;
2653         }
2654
2655         /*
2656          * Check that fcport is offloaded.  If it isn't then the spinlock
2657          * isn't valid and shouldn't be taken. We should just return.
2658          */
2659         if (!test_bit(QEDF_RPORT_SESSION_READY, &fcport->flags)) {
2660                 QEDF_ERR(&(qedf->dbg_ctx), "Session not offloaded yet.\n");
2661                 return;
2662         }
2663
2664
2665         switch (comp_type) {
2666         case FCOE_GOOD_COMPLETION_CQE_TYPE:
2667                 atomic_inc(&fcport->free_sqes);
2668                 switch (io_req->cmd_type) {
2669                 case QEDF_SCSI_CMD:
2670                         qedf_scsi_completion(qedf, cqe, io_req);
2671                         break;
2672                 case QEDF_ELS:
2673                         qedf_process_els_compl(qedf, cqe, io_req);
2674                         break;
2675                 case QEDF_TASK_MGMT_CMD:
2676                         qedf_process_tmf_compl(qedf, cqe, io_req);
2677                         break;
2678                 case QEDF_SEQ_CLEANUP:
2679                         qedf_process_seq_cleanup_compl(qedf, cqe, io_req);
2680                         break;
2681                 }
2682                 break;
2683         case FCOE_ERROR_DETECTION_CQE_TYPE:
2684                 atomic_inc(&fcport->free_sqes);
2685                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2686                     "Error detect CQE.\n");
2687                 qedf_process_error_detect(qedf, cqe, io_req);
2688                 break;
2689         case FCOE_EXCH_CLEANUP_CQE_TYPE:
2690                 atomic_inc(&fcport->free_sqes);
2691                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2692                     "Cleanup CQE.\n");
2693                 qedf_process_cleanup_compl(qedf, cqe, io_req);
2694                 break;
2695         case FCOE_ABTS_CQE_TYPE:
2696                 atomic_inc(&fcport->free_sqes);
2697                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2698                     "Abort CQE.\n");
2699                 qedf_process_abts_compl(qedf, cqe, io_req);
2700                 break;
2701         case FCOE_DUMMY_CQE_TYPE:
2702                 atomic_inc(&fcport->free_sqes);
2703                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2704                     "Dummy CQE.\n");
2705                 break;
2706         case FCOE_LOCAL_COMP_CQE_TYPE:
2707                 atomic_inc(&fcport->free_sqes);
2708                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2709                     "Local completion CQE.\n");
2710                 break;
2711         case FCOE_WARNING_CQE_TYPE:
2712                 atomic_inc(&fcport->free_sqes);
2713                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2714                     "Warning CQE.\n");
2715                 qedf_process_warning_compl(qedf, cqe, io_req);
2716                 break;
2717         case MAX_FCOE_CQE_TYPE:
2718                 atomic_inc(&fcport->free_sqes);
2719                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2720                     "Max FCoE CQE.\n");
2721                 break;
2722         default:
2723                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_IO,
2724                     "Default CQE.\n");
2725                 break;
2726         }
2727 }
2728
2729 static void qedf_free_bdq(struct qedf_ctx *qedf)
2730 {
2731         int i;
2732
2733         if (qedf->bdq_pbl_list)
2734                 dma_free_coherent(&qedf->pdev->dev, QEDF_PAGE_SIZE,
2735                     qedf->bdq_pbl_list, qedf->bdq_pbl_list_dma);
2736
2737         if (qedf->bdq_pbl)
2738                 dma_free_coherent(&qedf->pdev->dev, qedf->bdq_pbl_mem_size,
2739                     qedf->bdq_pbl, qedf->bdq_pbl_dma);
2740
2741         for (i = 0; i < QEDF_BDQ_SIZE; i++) {
2742                 if (qedf->bdq[i].buf_addr) {
2743                         dma_free_coherent(&qedf->pdev->dev, QEDF_BDQ_BUF_SIZE,
2744                             qedf->bdq[i].buf_addr, qedf->bdq[i].buf_dma);
2745                 }
2746         }
2747 }
2748
2749 static void qedf_free_global_queues(struct qedf_ctx *qedf)
2750 {
2751         int i;
2752         struct global_queue **gl = qedf->global_queues;
2753
2754         for (i = 0; i < qedf->num_queues; i++) {
2755                 if (!gl[i])
2756                         continue;
2757
2758                 if (gl[i]->cq)
2759                         dma_free_coherent(&qedf->pdev->dev,
2760                             gl[i]->cq_mem_size, gl[i]->cq, gl[i]->cq_dma);
2761                 if (gl[i]->cq_pbl)
2762                         dma_free_coherent(&qedf->pdev->dev, gl[i]->cq_pbl_size,
2763                             gl[i]->cq_pbl, gl[i]->cq_pbl_dma);
2764
2765                 kfree(gl[i]);
2766         }
2767
2768         qedf_free_bdq(qedf);
2769 }
2770
2771 static int qedf_alloc_bdq(struct qedf_ctx *qedf)
2772 {
2773         int i;
2774         struct scsi_bd *pbl;
2775         u64 *list;
2776         dma_addr_t page;
2777
2778         /* Alloc dma memory for BDQ buffers */
2779         for (i = 0; i < QEDF_BDQ_SIZE; i++) {
2780                 qedf->bdq[i].buf_addr = dma_alloc_coherent(&qedf->pdev->dev,
2781                     QEDF_BDQ_BUF_SIZE, &qedf->bdq[i].buf_dma, GFP_KERNEL);
2782                 if (!qedf->bdq[i].buf_addr) {
2783                         QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate BDQ "
2784                             "buffer %d.\n", i);
2785                         return -ENOMEM;
2786                 }
2787         }
2788
2789         /* Alloc dma memory for BDQ page buffer list */
2790         qedf->bdq_pbl_mem_size =
2791             QEDF_BDQ_SIZE * sizeof(struct scsi_bd);
2792         qedf->bdq_pbl_mem_size =
2793             ALIGN(qedf->bdq_pbl_mem_size, QEDF_PAGE_SIZE);
2794
2795         qedf->bdq_pbl = dma_alloc_coherent(&qedf->pdev->dev,
2796             qedf->bdq_pbl_mem_size, &qedf->bdq_pbl_dma, GFP_KERNEL);
2797         if (!qedf->bdq_pbl) {
2798                 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate BDQ PBL.\n");
2799                 return -ENOMEM;
2800         }
2801
2802         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
2803                   "BDQ PBL addr=0x%p dma=%pad\n",
2804                   qedf->bdq_pbl, &qedf->bdq_pbl_dma);
2805
2806         /*
2807          * Populate BDQ PBL with physical and virtual address of individual
2808          * BDQ buffers
2809          */
2810         pbl = (struct scsi_bd *)qedf->bdq_pbl;
2811         for (i = 0; i < QEDF_BDQ_SIZE; i++) {
2812                 pbl->address.hi = cpu_to_le32(U64_HI(qedf->bdq[i].buf_dma));
2813                 pbl->address.lo = cpu_to_le32(U64_LO(qedf->bdq[i].buf_dma));
2814                 pbl->opaque.fcoe_opaque.hi = 0;
2815                 /* Opaque lo data is an index into the BDQ array */
2816                 pbl->opaque.fcoe_opaque.lo = cpu_to_le32(i);
2817                 pbl++;
2818         }
2819
2820         /* Allocate list of PBL pages */
2821         qedf->bdq_pbl_list = dma_alloc_coherent(&qedf->pdev->dev,
2822                                                 QEDF_PAGE_SIZE,
2823                                                 &qedf->bdq_pbl_list_dma,
2824                                                 GFP_KERNEL);
2825         if (!qedf->bdq_pbl_list) {
2826                 QEDF_ERR(&(qedf->dbg_ctx), "Could not allocate list of PBL pages.\n");
2827                 return -ENOMEM;
2828         }
2829
2830         /*
2831          * Now populate PBL list with pages that contain pointers to the
2832          * individual buffers.
2833          */
2834         qedf->bdq_pbl_list_num_entries = qedf->bdq_pbl_mem_size /
2835             QEDF_PAGE_SIZE;
2836         list = (u64 *)qedf->bdq_pbl_list;
2837         page = qedf->bdq_pbl_list_dma;
2838         for (i = 0; i < qedf->bdq_pbl_list_num_entries; i++) {
2839                 *list = qedf->bdq_pbl_dma;
2840                 list++;
2841                 page += QEDF_PAGE_SIZE;
2842         }
2843
2844         return 0;
2845 }
2846
2847 static int qedf_alloc_global_queues(struct qedf_ctx *qedf)
2848 {
2849         u32 *list;
2850         int i;
2851         int status = 0, rc;
2852         u32 *pbl;
2853         dma_addr_t page;
2854         int num_pages;
2855
2856         /* Allocate and map CQs, RQs */
2857         /*
2858          * Number of global queues (CQ / RQ). This should
2859          * be <= number of available MSIX vectors for the PF
2860          */
2861         if (!qedf->num_queues) {
2862                 QEDF_ERR(&(qedf->dbg_ctx), "No MSI-X vectors available!\n");
2863                 return 1;
2864         }
2865
2866         /*
2867          * Make sure we allocated the PBL that will contain the physical
2868          * addresses of our queues
2869          */
2870         if (!qedf->p_cpuq) {
2871                 status = 1;
2872                 goto mem_alloc_failure;
2873         }
2874
2875         qedf->global_queues = kzalloc((sizeof(struct global_queue *)
2876             * qedf->num_queues), GFP_KERNEL);
2877         if (!qedf->global_queues) {
2878                 QEDF_ERR(&(qedf->dbg_ctx), "Unable to allocate global "
2879                           "queues array ptr memory\n");
2880                 return -ENOMEM;
2881         }
2882         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
2883                    "qedf->global_queues=%p.\n", qedf->global_queues);
2884
2885         /* Allocate DMA coherent buffers for BDQ */
2886         rc = qedf_alloc_bdq(qedf);
2887         if (rc)
2888                 goto mem_alloc_failure;
2889
2890         /* Allocate a CQ and an associated PBL for each MSI-X vector */
2891         for (i = 0; i < qedf->num_queues; i++) {
2892                 qedf->global_queues[i] = kzalloc(sizeof(struct global_queue),
2893                     GFP_KERNEL);
2894                 if (!qedf->global_queues[i]) {
2895                         QEDF_WARN(&(qedf->dbg_ctx), "Unable to allocate "
2896                                    "global queue %d.\n", i);
2897                         status = -ENOMEM;
2898                         goto mem_alloc_failure;
2899                 }
2900
2901                 qedf->global_queues[i]->cq_mem_size =
2902                     FCOE_PARAMS_CQ_NUM_ENTRIES * sizeof(struct fcoe_cqe);
2903                 qedf->global_queues[i]->cq_mem_size =
2904                     ALIGN(qedf->global_queues[i]->cq_mem_size, QEDF_PAGE_SIZE);
2905
2906                 qedf->global_queues[i]->cq_pbl_size =
2907                     (qedf->global_queues[i]->cq_mem_size /
2908                     PAGE_SIZE) * sizeof(void *);
2909                 qedf->global_queues[i]->cq_pbl_size =
2910                     ALIGN(qedf->global_queues[i]->cq_pbl_size, QEDF_PAGE_SIZE);
2911
2912                 qedf->global_queues[i]->cq =
2913                     dma_alloc_coherent(&qedf->pdev->dev,
2914                                        qedf->global_queues[i]->cq_mem_size,
2915                                        &qedf->global_queues[i]->cq_dma,
2916                                        GFP_KERNEL);
2917
2918                 if (!qedf->global_queues[i]->cq) {
2919                         QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate cq.\n");
2920                         status = -ENOMEM;
2921                         goto mem_alloc_failure;
2922                 }
2923
2924                 qedf->global_queues[i]->cq_pbl =
2925                     dma_alloc_coherent(&qedf->pdev->dev,
2926                                        qedf->global_queues[i]->cq_pbl_size,
2927                                        &qedf->global_queues[i]->cq_pbl_dma,
2928                                        GFP_KERNEL);
2929
2930                 if (!qedf->global_queues[i]->cq_pbl) {
2931                         QEDF_WARN(&(qedf->dbg_ctx), "Could not allocate cq PBL.\n");
2932                         status = -ENOMEM;
2933                         goto mem_alloc_failure;
2934                 }
2935
2936                 /* Create PBL */
2937                 num_pages = qedf->global_queues[i]->cq_mem_size /
2938                     QEDF_PAGE_SIZE;
2939                 page = qedf->global_queues[i]->cq_dma;
2940                 pbl = (u32 *)qedf->global_queues[i]->cq_pbl;
2941
2942                 while (num_pages--) {
2943                         *pbl = U64_LO(page);
2944                         pbl++;
2945                         *pbl = U64_HI(page);
2946                         pbl++;
2947                         page += QEDF_PAGE_SIZE;
2948                 }
2949                 /* Set the initial consumer index for cq */
2950                 qedf->global_queues[i]->cq_cons_idx = 0;
2951         }
2952
2953         list = (u32 *)qedf->p_cpuq;
2954
2955         /*
2956          * The list is built as follows: CQ#0 PBL pointer, RQ#0 PBL pointer,
2957          * CQ#1 PBL pointer, RQ#1 PBL pointer, etc.  Each PBL pointer points
2958          * to the physical address which contains an array of pointers to
2959          * the physical addresses of the specific queue pages.
2960          */
2961         for (i = 0; i < qedf->num_queues; i++) {
2962                 *list = U64_LO(qedf->global_queues[i]->cq_pbl_dma);
2963                 list++;
2964                 *list = U64_HI(qedf->global_queues[i]->cq_pbl_dma);
2965                 list++;
2966                 *list = U64_LO(0);
2967                 list++;
2968                 *list = U64_HI(0);
2969                 list++;
2970         }
2971
2972         return 0;
2973
2974 mem_alloc_failure:
2975         qedf_free_global_queues(qedf);
2976         return status;
2977 }
2978
2979 static int qedf_set_fcoe_pf_param(struct qedf_ctx *qedf)
2980 {
2981         u8 sq_num_pbl_pages;
2982         u32 sq_mem_size;
2983         u32 cq_mem_size;
2984         u32 cq_num_entries;
2985         int rval;
2986
2987         /*
2988          * The number of completion queues/fastpath interrupts/status blocks
2989          * we allocation is the minimum off:
2990          *
2991          * Number of CPUs
2992          * Number allocated by qed for our PCI function
2993          */
2994         qedf->num_queues = MIN_NUM_CPUS_MSIX(qedf);
2995
2996         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Number of CQs is %d.\n",
2997                    qedf->num_queues);
2998
2999         qedf->p_cpuq = dma_alloc_coherent(&qedf->pdev->dev,
3000             qedf->num_queues * sizeof(struct qedf_glbl_q_params),
3001             &qedf->hw_p_cpuq, GFP_KERNEL);
3002
3003         if (!qedf->p_cpuq) {
3004                 QEDF_ERR(&(qedf->dbg_ctx), "dma_alloc_coherent failed.\n");
3005                 return 1;
3006         }
3007
3008         rval = qedf_alloc_global_queues(qedf);
3009         if (rval) {
3010                 QEDF_ERR(&(qedf->dbg_ctx), "Global queue allocation "
3011                           "failed.\n");
3012                 return 1;
3013         }
3014
3015         /* Calculate SQ PBL size in the same manner as in qedf_sq_alloc() */
3016         sq_mem_size = SQ_NUM_ENTRIES * sizeof(struct fcoe_wqe);
3017         sq_mem_size = ALIGN(sq_mem_size, QEDF_PAGE_SIZE);
3018         sq_num_pbl_pages = (sq_mem_size / QEDF_PAGE_SIZE);
3019
3020         /* Calculate CQ num entries */
3021         cq_mem_size = FCOE_PARAMS_CQ_NUM_ENTRIES * sizeof(struct fcoe_cqe);
3022         cq_mem_size = ALIGN(cq_mem_size, QEDF_PAGE_SIZE);
3023         cq_num_entries = cq_mem_size / sizeof(struct fcoe_cqe);
3024
3025         memset(&(qedf->pf_params), 0, sizeof(qedf->pf_params));
3026
3027         /* Setup the value for fcoe PF */
3028         qedf->pf_params.fcoe_pf_params.num_cons = QEDF_MAX_SESSIONS;
3029         qedf->pf_params.fcoe_pf_params.num_tasks = FCOE_PARAMS_NUM_TASKS;
3030         qedf->pf_params.fcoe_pf_params.glbl_q_params_addr =
3031             (u64)qedf->hw_p_cpuq;
3032         qedf->pf_params.fcoe_pf_params.sq_num_pbl_pages = sq_num_pbl_pages;
3033
3034         qedf->pf_params.fcoe_pf_params.rq_buffer_log_size = 0;
3035
3036         qedf->pf_params.fcoe_pf_params.cq_num_entries = cq_num_entries;
3037         qedf->pf_params.fcoe_pf_params.num_cqs = qedf->num_queues;
3038
3039         /* log_page_size: 12 for 4KB pages */
3040         qedf->pf_params.fcoe_pf_params.log_page_size = ilog2(QEDF_PAGE_SIZE);
3041
3042         qedf->pf_params.fcoe_pf_params.mtu = 9000;
3043         qedf->pf_params.fcoe_pf_params.gl_rq_pi = QEDF_FCOE_PARAMS_GL_RQ_PI;
3044         qedf->pf_params.fcoe_pf_params.gl_cmd_pi = QEDF_FCOE_PARAMS_GL_CMD_PI;
3045
3046         /* BDQ address and size */
3047         qedf->pf_params.fcoe_pf_params.bdq_pbl_base_addr[0] =
3048             qedf->bdq_pbl_list_dma;
3049         qedf->pf_params.fcoe_pf_params.bdq_pbl_num_entries[0] =
3050             qedf->bdq_pbl_list_num_entries;
3051         qedf->pf_params.fcoe_pf_params.rq_buffer_size = QEDF_BDQ_BUF_SIZE;
3052
3053         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3054             "bdq_list=%p bdq_pbl_list_dma=%llx bdq_pbl_list_entries=%d.\n",
3055             qedf->bdq_pbl_list,
3056             qedf->pf_params.fcoe_pf_params.bdq_pbl_base_addr[0],
3057             qedf->pf_params.fcoe_pf_params.bdq_pbl_num_entries[0]);
3058
3059         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3060             "cq_num_entries=%d.\n",
3061             qedf->pf_params.fcoe_pf_params.cq_num_entries);
3062
3063         return 0;
3064 }
3065
3066 /* Free DMA coherent memory for array of queue pointers we pass to qed */
3067 static void qedf_free_fcoe_pf_param(struct qedf_ctx *qedf)
3068 {
3069         size_t size = 0;
3070
3071         if (qedf->p_cpuq) {
3072                 size = qedf->num_queues * sizeof(struct qedf_glbl_q_params);
3073                 dma_free_coherent(&qedf->pdev->dev, size, qedf->p_cpuq,
3074                     qedf->hw_p_cpuq);
3075         }
3076
3077         qedf_free_global_queues(qedf);
3078
3079         kfree(qedf->global_queues);
3080 }
3081
3082 /*
3083  * PCI driver functions
3084  */
3085
3086 static const struct pci_device_id qedf_pci_tbl[] = {
3087         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x165c) },
3088         { PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, 0x8080) },
3089         {0}
3090 };
3091 MODULE_DEVICE_TABLE(pci, qedf_pci_tbl);
3092
3093 static struct pci_driver qedf_pci_driver = {
3094         .name = QEDF_MODULE_NAME,
3095         .id_table = qedf_pci_tbl,
3096         .probe = qedf_probe,
3097         .remove = qedf_remove,
3098 };
3099
3100 static int __qedf_probe(struct pci_dev *pdev, int mode)
3101 {
3102         int rc = -EINVAL;
3103         struct fc_lport *lport;
3104         struct qedf_ctx *qedf;
3105         struct Scsi_Host *host;
3106         bool is_vf = false;
3107         struct qed_ll2_params params;
3108         char host_buf[20];
3109         struct qed_link_params link_params;
3110         int status;
3111         void *task_start, *task_end;
3112         struct qed_slowpath_params slowpath_params;
3113         struct qed_probe_params qed_params;
3114         u16 tmp;
3115
3116         /*
3117          * When doing error recovery we didn't reap the lport so don't try
3118          * to reallocate it.
3119          */
3120         if (mode != QEDF_MODE_RECOVERY) {
3121                 lport = libfc_host_alloc(&qedf_host_template,
3122                     sizeof(struct qedf_ctx));
3123
3124                 if (!lport) {
3125                         QEDF_ERR(NULL, "Could not allocate lport.\n");
3126                         rc = -ENOMEM;
3127                         goto err0;
3128                 }
3129
3130                 fc_disc_init(lport);
3131
3132                 /* Initialize qedf_ctx */
3133                 qedf = lport_priv(lport);
3134                 qedf->lport = lport;
3135                 qedf->ctlr.lp = lport;
3136                 qedf->pdev = pdev;
3137                 qedf->dbg_ctx.pdev = pdev;
3138                 qedf->dbg_ctx.host_no = lport->host->host_no;
3139                 spin_lock_init(&qedf->hba_lock);
3140                 INIT_LIST_HEAD(&qedf->fcports);
3141                 qedf->curr_conn_id = QEDF_MAX_SESSIONS - 1;
3142                 atomic_set(&qedf->num_offloads, 0);
3143                 qedf->stop_io_on_error = false;
3144                 pci_set_drvdata(pdev, qedf);
3145                 init_completion(&qedf->fipvlan_compl);
3146                 mutex_init(&qedf->stats_mutex);
3147                 mutex_init(&qedf->flush_mutex);
3148
3149                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_INFO,
3150                    "QLogic FastLinQ FCoE Module qedf %s, "
3151                    "FW %d.%d.%d.%d\n", QEDF_VERSION,
3152                    FW_MAJOR_VERSION, FW_MINOR_VERSION, FW_REVISION_VERSION,
3153                    FW_ENGINEERING_VERSION);
3154         } else {
3155                 /* Init pointers during recovery */
3156                 qedf = pci_get_drvdata(pdev);
3157                 lport = qedf->lport;
3158         }
3159
3160         host = lport->host;
3161
3162         /* Allocate mempool for qedf_io_work structs */
3163         qedf->io_mempool = mempool_create_slab_pool(QEDF_IO_WORK_MIN,
3164             qedf_io_work_cache);
3165         if (qedf->io_mempool == NULL) {
3166                 QEDF_ERR(&(qedf->dbg_ctx), "qedf->io_mempool is NULL.\n");
3167                 goto err1;
3168         }
3169         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_INFO, "qedf->io_mempool=%p.\n",
3170             qedf->io_mempool);
3171
3172         sprintf(host_buf, "qedf_%u_link",
3173             qedf->lport->host->host_no);
3174         qedf->link_update_wq = create_workqueue(host_buf);
3175         INIT_DELAYED_WORK(&qedf->link_update, qedf_handle_link_update);
3176         INIT_DELAYED_WORK(&qedf->link_recovery, qedf_link_recovery);
3177         INIT_DELAYED_WORK(&qedf->grcdump_work, qedf_wq_grcdump);
3178         qedf->fipvlan_retries = qedf_fipvlan_retries;
3179         /* Set a default prio in case DCBX doesn't converge */
3180         if (qedf_default_prio > -1) {
3181                 /*
3182                  * This is the case where we pass a modparam in so we want to
3183                  * honor it even if dcbx doesn't converge.
3184                  */
3185                 qedf->prio = qedf_default_prio;
3186         } else
3187                 qedf->prio = QEDF_DEFAULT_PRIO;
3188
3189         /*
3190          * Common probe. Takes care of basic hardware init and pci_*
3191          * functions.
3192          */
3193         memset(&qed_params, 0, sizeof(qed_params));
3194         qed_params.protocol = QED_PROTOCOL_FCOE;
3195         qed_params.dp_module = qedf_dp_module;
3196         qed_params.dp_level = qedf_dp_level;
3197         qed_params.is_vf = is_vf;
3198         qedf->cdev = qed_ops->common->probe(pdev, &qed_params);
3199         if (!qedf->cdev) {
3200                 rc = -ENODEV;
3201                 goto err1;
3202         }
3203
3204         /* Learn information crucial for qedf to progress */
3205         rc = qed_ops->fill_dev_info(qedf->cdev, &qedf->dev_info);
3206         if (rc) {
3207                 QEDF_ERR(&(qedf->dbg_ctx), "Failed to dev info.\n");
3208                 goto err1;
3209         }
3210
3211         /* queue allocation code should come here
3212          * order should be
3213          *      slowpath_start
3214          *      status block allocation
3215          *      interrupt registration (to get min number of queues)
3216          *      set_fcoe_pf_param
3217          *      qed_sp_fcoe_func_start
3218          */
3219         rc = qedf_set_fcoe_pf_param(qedf);
3220         if (rc) {
3221                 QEDF_ERR(&(qedf->dbg_ctx), "Cannot set fcoe pf param.\n");
3222                 goto err2;
3223         }
3224         qed_ops->common->update_pf_params(qedf->cdev, &qedf->pf_params);
3225
3226         /* Record BDQ producer doorbell addresses */
3227         qedf->bdq_primary_prod = qedf->dev_info.primary_dbq_rq_addr;
3228         qedf->bdq_secondary_prod = qedf->dev_info.secondary_bdq_rq_addr;
3229         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3230             "BDQ primary_prod=%p secondary_prod=%p.\n", qedf->bdq_primary_prod,
3231             qedf->bdq_secondary_prod);
3232
3233         qed_ops->register_ops(qedf->cdev, &qedf_cb_ops, qedf);
3234
3235         rc = qedf_prepare_sb(qedf);
3236         if (rc) {
3237
3238                 QEDF_ERR(&(qedf->dbg_ctx), "Cannot start slowpath.\n");
3239                 goto err2;
3240         }
3241
3242         /* Start the Slowpath-process */
3243         slowpath_params.int_mode = QED_INT_MODE_MSIX;
3244         slowpath_params.drv_major = QEDF_DRIVER_MAJOR_VER;
3245         slowpath_params.drv_minor = QEDF_DRIVER_MINOR_VER;
3246         slowpath_params.drv_rev = QEDF_DRIVER_REV_VER;
3247         slowpath_params.drv_eng = QEDF_DRIVER_ENG_VER;
3248         strncpy(slowpath_params.name, "qedf", QED_DRV_VER_STR_SIZE);
3249         rc = qed_ops->common->slowpath_start(qedf->cdev, &slowpath_params);
3250         if (rc) {
3251                 QEDF_ERR(&(qedf->dbg_ctx), "Cannot start slowpath.\n");
3252                 goto err2;
3253         }
3254
3255         /*
3256          * update_pf_params needs to be called before and after slowpath
3257          * start
3258          */
3259         qed_ops->common->update_pf_params(qedf->cdev, &qedf->pf_params);
3260
3261         /* Setup interrupts */
3262         rc = qedf_setup_int(qedf);
3263         if (rc)
3264                 goto err3;
3265
3266         rc = qed_ops->start(qedf->cdev, &qedf->tasks);
3267         if (rc) {
3268                 QEDF_ERR(&(qedf->dbg_ctx), "Cannot start FCoE function.\n");
3269                 goto err4;
3270         }
3271         task_start = qedf_get_task_mem(&qedf->tasks, 0);
3272         task_end = qedf_get_task_mem(&qedf->tasks, MAX_TID_BLOCKS_FCOE - 1);
3273         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "Task context start=%p, "
3274                    "end=%p block_size=%u.\n", task_start, task_end,
3275                    qedf->tasks.size);
3276
3277         /*
3278          * We need to write the number of BDs in the BDQ we've preallocated so
3279          * the f/w will do a prefetch and we'll get an unsolicited CQE when a
3280          * packet arrives.
3281          */
3282         qedf->bdq_prod_idx = QEDF_BDQ_SIZE;
3283         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3284             "Writing %d to primary and secondary BDQ doorbell registers.\n",
3285             qedf->bdq_prod_idx);
3286         writew(qedf->bdq_prod_idx, qedf->bdq_primary_prod);
3287         tmp = readw(qedf->bdq_primary_prod);
3288         writew(qedf->bdq_prod_idx, qedf->bdq_secondary_prod);
3289         tmp = readw(qedf->bdq_secondary_prod);
3290
3291         qed_ops->common->set_power_state(qedf->cdev, PCI_D0);
3292
3293         /* Now that the dev_info struct has been filled in set the MAC
3294          * address
3295          */
3296         ether_addr_copy(qedf->mac, qedf->dev_info.common.hw_mac);
3297         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC, "MAC address is %pM.\n",
3298                    qedf->mac);
3299
3300         /*
3301          * Set the WWNN and WWPN in the following way:
3302          *
3303          * If the info we get from qed is non-zero then use that to set the
3304          * WWPN and WWNN. Otherwise fall back to use fcoe_wwn_from_mac() based
3305          * on the MAC address.
3306          */
3307         if (qedf->dev_info.wwnn != 0 && qedf->dev_info.wwpn != 0) {
3308                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3309                     "Setting WWPN and WWNN from qed dev_info.\n");
3310                 qedf->wwnn = qedf->dev_info.wwnn;
3311                 qedf->wwpn = qedf->dev_info.wwpn;
3312         } else {
3313                 QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3314                     "Setting WWPN and WWNN using fcoe_wwn_from_mac().\n");
3315                 qedf->wwnn = fcoe_wwn_from_mac(qedf->mac, 1, 0);
3316                 qedf->wwpn = fcoe_wwn_from_mac(qedf->mac, 2, 0);
3317         }
3318         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,  "WWNN=%016llx "
3319                    "WWPN=%016llx.\n", qedf->wwnn, qedf->wwpn);
3320
3321         sprintf(host_buf, "host_%d", host->host_no);
3322         qed_ops->common->set_name(qedf->cdev, host_buf);
3323
3324         /* Allocate cmd mgr */
3325         qedf->cmd_mgr = qedf_cmd_mgr_alloc(qedf);
3326         if (!qedf->cmd_mgr) {
3327                 QEDF_ERR(&(qedf->dbg_ctx), "Failed to allocate cmd mgr.\n");
3328                 rc = -ENOMEM;
3329                 goto err5;
3330         }
3331
3332         if (mode != QEDF_MODE_RECOVERY) {
3333                 host->transportt = qedf_fc_transport_template;
3334                 host->max_lun = qedf_max_lun;
3335                 host->max_cmd_len = QEDF_MAX_CDB_LEN;
3336                 host->can_queue = FCOE_PARAMS_NUM_TASKS;
3337                 rc = scsi_add_host(host, &pdev->dev);
3338                 if (rc) {
3339                         QEDF_WARN(&qedf->dbg_ctx,
3340                                   "Error adding Scsi_Host rc=0x%x.\n", rc);
3341                         goto err6;
3342                 }
3343         }
3344
3345         memset(&params, 0, sizeof(params));
3346         params.mtu = 9000;
3347         ether_addr_copy(params.ll2_mac_address, qedf->mac);
3348
3349         /* Start LL2 processing thread */
3350         snprintf(host_buf, 20, "qedf_%d_ll2", host->host_no);
3351         qedf->ll2_recv_wq =
3352                 create_workqueue(host_buf);
3353         if (!qedf->ll2_recv_wq) {
3354                 QEDF_ERR(&(qedf->dbg_ctx), "Failed to LL2 workqueue.\n");
3355                 rc = -ENOMEM;
3356                 goto err7;
3357         }
3358
3359 #ifdef CONFIG_DEBUG_FS
3360         qedf_dbg_host_init(&(qedf->dbg_ctx), qedf_debugfs_ops,
3361                             qedf_dbg_fops);
3362 #endif
3363
3364         /* Start LL2 */
3365         qed_ops->ll2->register_cb_ops(qedf->cdev, &qedf_ll2_cb_ops, qedf);
3366         rc = qed_ops->ll2->start(qedf->cdev, &params);
3367         if (rc) {
3368                 QEDF_ERR(&(qedf->dbg_ctx), "Could not start Light L2.\n");
3369                 goto err7;
3370         }
3371         set_bit(QEDF_LL2_STARTED, &qedf->flags);
3372
3373         /* Set initial FIP/FCoE VLAN to NULL */
3374         qedf->vlan_id = 0;
3375
3376         /*
3377          * No need to setup fcoe_ctlr or fc_lport objects during recovery since
3378          * they were not reaped during the unload process.
3379          */
3380         if (mode != QEDF_MODE_RECOVERY) {
3381                 /* Setup imbedded fcoe controller */
3382                 qedf_fcoe_ctlr_setup(qedf);
3383
3384                 /* Setup lport */
3385                 rc = qedf_lport_setup(qedf);
3386                 if (rc) {
3387                         QEDF_ERR(&(qedf->dbg_ctx),
3388                             "qedf_lport_setup failed.\n");
3389                         goto err7;
3390                 }
3391         }
3392
3393         sprintf(host_buf, "qedf_%u_timer", qedf->lport->host->host_no);
3394         qedf->timer_work_queue =
3395                 create_workqueue(host_buf);
3396         if (!qedf->timer_work_queue) {
3397                 QEDF_ERR(&(qedf->dbg_ctx), "Failed to start timer "
3398                           "workqueue.\n");
3399                 rc = -ENOMEM;
3400                 goto err7;
3401         }
3402
3403         /* DPC workqueue is not reaped during recovery unload */
3404         if (mode != QEDF_MODE_RECOVERY) {
3405                 sprintf(host_buf, "qedf_%u_dpc",
3406                     qedf->lport->host->host_no);
3407                 qedf->dpc_wq = create_workqueue(host_buf);
3408         }
3409
3410         /*
3411          * GRC dump and sysfs parameters are not reaped during the recovery
3412          * unload process.
3413          */
3414         if (mode != QEDF_MODE_RECOVERY) {
3415                 qedf->grcdump_size =
3416                     qed_ops->common->dbg_all_data_size(qedf->cdev);
3417                 if (qedf->grcdump_size) {
3418                         rc = qedf_alloc_grc_dump_buf(&qedf->grcdump,
3419                             qedf->grcdump_size);
3420                         if (rc) {
3421                                 QEDF_ERR(&(qedf->dbg_ctx),
3422                                     "GRC Dump buffer alloc failed.\n");
3423                                 qedf->grcdump = NULL;
3424                         }
3425
3426                         QEDF_INFO(&(qedf->dbg_ctx), QEDF_LOG_DISC,
3427                             "grcdump: addr=%p, size=%u.\n",
3428                             qedf->grcdump, qedf->grcdump_size);
3429                 }
3430                 qedf_create_sysfs_ctx_attr(qedf);
3431
3432                 /* Initialize I/O tracing for this adapter */
3433                 spin_lock_init(&qedf->io_trace_lock);
3434                 qedf->io_trace_idx = 0;
3435         }
3436
3437         init_completion(&qedf->flogi_compl);
3438
3439         status = qed_ops->common->update_drv_state(qedf->cdev, true);
3440         if (status)
3441                 QEDF_ERR(&(qedf->dbg_ctx),
3442                         "Failed to send drv state to MFW.\n");
3443
3444         memset(&link_params, 0, sizeof(struct qed_link_params));
3445         link_params.link_up = true;
3446         status = qed_ops->common->set_link(qedf->cdev, &link_params);
3447         if (status)
3448                 QEDF_WARN(&(qedf->dbg_ctx), "set_link failed.\n");
3449
3450         /* Start/restart discovery */
3451         if (mode == QEDF_MODE_RECOVERY)
3452                 fcoe_ctlr_link_up(&qedf->ctlr);
3453         else
3454                 fc_fabric_login(lport);
3455
3456         /* All good */
3457         return 0;
3458
3459 err7:
3460         if (qedf->ll2_recv_wq)
3461                 destroy_workqueue(qedf->ll2_recv_wq);
3462         fc_remove_host(qedf->lport->host);
3463         scsi_remove_host(qedf->lport->host);
3464 #ifdef CONFIG_DEBUG_FS
3465         qedf_dbg_host_exit(&(qedf->dbg_ctx));
3466 #endif
3467 err6:
3468         qedf_cmd_mgr_free(qedf->cmd_mgr);
3469 err5:
3470         qed_ops->stop(qedf->cdev);
3471 err4:
3472         qedf_free_fcoe_pf_param(qedf);
3473         qedf_sync_free_irqs(qedf);
3474 err3:
3475         qed_ops->common->slowpath_stop(qedf->cdev);
3476 err2:
3477         qed_ops->common->remove(qedf->cdev);
3478 err1:
3479         scsi_host_put(lport->host);
3480 err0:
3481         return rc;
3482 }
3483
3484 static int qedf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
3485 {
3486         return __qedf_probe(pdev, QEDF_MODE_NORMAL);
3487 }
3488
3489 static void __qedf_remove(struct pci_dev *pdev, int mode)
3490 {
3491         struct qedf_ctx *qedf;
3492         int rc;
3493
3494         if (!pdev) {
3495                 QEDF_ERR(NULL, "pdev is NULL.\n");
3496                 return;
3497         }
3498
3499         qedf = pci_get_drvdata(pdev);
3500
3501         /*
3502          * Prevent race where we're in board disable work and then try to
3503          * rmmod the module.
3504          */
3505         if (test_bit(QEDF_UNLOADING, &qedf->flags)) {
3506                 QEDF_ERR(&qedf->dbg_ctx, "Already removing PCI function.\n");
3507                 return;
3508         }
3509
3510         if (mode != QEDF_MODE_RECOVERY)
3511                 set_bit(QEDF_UNLOADING, &qedf->flags);
3512
3513         /* Logoff the fabric to upload all connections */
3514         if (mode == QEDF_MODE_RECOVERY)
3515                 fcoe_ctlr_link_down(&qedf->ctlr);
3516         else
3517                 fc_fabric_logoff(qedf->lport);
3518
3519         if (qedf_wait_for_upload(qedf) == false)
3520                 QEDF_ERR(&qedf->dbg_ctx, "Could not upload all sessions.\n");
3521
3522 #ifdef CONFIG_DEBUG_FS
3523         qedf_dbg_host_exit(&(qedf->dbg_ctx));
3524 #endif
3525
3526         /* Stop any link update handling */
3527         cancel_delayed_work_sync(&qedf->link_update);
3528         destroy_workqueue(qedf->link_update_wq);
3529         qedf->link_update_wq = NULL;
3530
3531         if (qedf->timer_work_queue)
3532                 destroy_workqueue(qedf->timer_work_queue);
3533
3534         /* Stop Light L2 */
3535         clear_bit(QEDF_LL2_STARTED, &qedf->flags);
3536         qed_ops->ll2->stop(qedf->cdev);
3537         if (qedf->ll2_recv_wq)
3538                 destroy_workqueue(qedf->ll2_recv_wq);
3539
3540         /* Stop fastpath */
3541         qedf_sync_free_irqs(qedf);
3542         qedf_destroy_sb(qedf);
3543
3544         /*
3545          * During recovery don't destroy OS constructs that represent the
3546          * physical port.
3547          */
3548         if (mode != QEDF_MODE_RECOVERY) {
3549                 qedf_free_grc_dump_buf(&qedf->grcdump);
3550                 qedf_remove_sysfs_ctx_attr(qedf);
3551
3552                 /* Remove all SCSI/libfc/libfcoe structures */
3553                 fcoe_ctlr_destroy(&qedf->ctlr);
3554                 fc_lport_destroy(qedf->lport);
3555                 fc_remove_host(qedf->lport->host);
3556                 scsi_remove_host(qedf->lport->host);
3557         }
3558
3559         qedf_cmd_mgr_free(qedf->cmd_mgr);
3560
3561         if (mode != QEDF_MODE_RECOVERY) {
3562                 fc_exch_mgr_free(qedf->lport);
3563                 fc_lport_free_stats(qedf->lport);
3564
3565                 /* Wait for all vports to be reaped */
3566                 qedf_wait_for_vport_destroy(qedf);
3567         }
3568
3569         /*
3570          * Now that all connections have been uploaded we can stop the
3571          * rest of the qed operations
3572          */
3573         qed_ops->stop(qedf->cdev);
3574
3575         if (mode != QEDF_MODE_RECOVERY) {
3576                 if (qedf->dpc_wq) {
3577                         /* Stop general DPC handling */
3578                         destroy_workqueue(qedf->dpc_wq);
3579                         qedf->dpc_wq = NULL;
3580                 }
3581         }
3582
3583         /* Final shutdown for the board */
3584         qedf_free_fcoe_pf_param(qedf);
3585         if (mode != QEDF_MODE_RECOVERY) {
3586                 qed_ops->common->set_power_state(qedf->cdev, PCI_D0);
3587                 pci_set_drvdata(pdev, NULL);
3588         }
3589
3590         rc = qed_ops->common->update_drv_state(qedf->cdev, false);
3591         if (rc)
3592                 QEDF_ERR(&(qedf->dbg_ctx),
3593                         "Failed to send drv state to MFW.\n");
3594
3595         qed_ops->common->slowpath_stop(qedf->cdev);
3596         qed_ops->common->remove(qedf->cdev);
3597
3598         mempool_destroy(qedf->io_mempool);
3599
3600         /* Only reap the Scsi_host on a real removal */
3601         if (mode != QEDF_MODE_RECOVERY)
3602                 scsi_host_put(qedf->lport->host);
3603 }
3604
3605 static void qedf_remove(struct pci_dev *pdev)
3606 {
3607         /* Check to make sure this function wasn't already disabled */
3608         if (!atomic_read(&pdev->enable_cnt))
3609                 return;
3610
3611         __qedf_remove(pdev, QEDF_MODE_NORMAL);
3612 }
3613
3614 void qedf_wq_grcdump(struct work_struct *work)
3615 {
3616         struct qedf_ctx *qedf =
3617             container_of(work, struct qedf_ctx, grcdump_work.work);
3618
3619         QEDF_ERR(&(qedf->dbg_ctx), "Collecting GRC dump.\n");
3620         qedf_capture_grc_dump(qedf);
3621 }
3622
3623 /*
3624  * Protocol TLV handler
3625  */
3626 void qedf_get_protocol_tlv_data(void *dev, void *data)
3627 {
3628         struct qedf_ctx *qedf = dev;
3629         struct qed_mfw_tlv_fcoe *fcoe = data;
3630         struct fc_lport *lport = qedf->lport;
3631         struct Scsi_Host *host = lport->host;
3632         struct fc_host_attrs *fc_host = shost_to_fc_host(host);
3633         struct fc_host_statistics *hst;
3634
3635         /* Force a refresh of the fc_host stats including offload stats */
3636         hst = qedf_fc_get_host_stats(host);
3637
3638         fcoe->qos_pri_set = true;
3639         fcoe->qos_pri = 3; /* Hard coded to 3 in driver */
3640
3641         fcoe->ra_tov_set = true;
3642         fcoe->ra_tov = lport->r_a_tov;
3643
3644         fcoe->ed_tov_set = true;
3645         fcoe->ed_tov = lport->e_d_tov;
3646
3647         fcoe->npiv_state_set = true;
3648         fcoe->npiv_state = 1; /* NPIV always enabled */
3649
3650         fcoe->num_npiv_ids_set = true;
3651         fcoe->num_npiv_ids = fc_host->npiv_vports_inuse;
3652
3653         /* Certain attributes we only want to set if we've selected an FCF */
3654         if (qedf->ctlr.sel_fcf) {
3655                 fcoe->switch_name_set = true;
3656                 u64_to_wwn(qedf->ctlr.sel_fcf->switch_name, fcoe->switch_name);
3657         }
3658
3659         fcoe->port_state_set = true;
3660         /* For qedf we're either link down or fabric attach */
3661         if (lport->link_up)
3662                 fcoe->port_state = QED_MFW_TLV_PORT_STATE_FABRIC;
3663         else
3664                 fcoe->port_state = QED_MFW_TLV_PORT_STATE_OFFLINE;
3665
3666         fcoe->link_failures_set = true;
3667         fcoe->link_failures = (u16)hst->link_failure_count;
3668
3669         fcoe->fcoe_txq_depth_set = true;
3670         fcoe->fcoe_rxq_depth_set = true;
3671         fcoe->fcoe_rxq_depth = FCOE_PARAMS_NUM_TASKS;
3672         fcoe->fcoe_txq_depth = FCOE_PARAMS_NUM_TASKS;
3673
3674         fcoe->fcoe_rx_frames_set = true;
3675         fcoe->fcoe_rx_frames = hst->rx_frames;
3676
3677         fcoe->fcoe_tx_frames_set = true;
3678         fcoe->fcoe_tx_frames = hst->tx_frames;
3679
3680         fcoe->fcoe_rx_bytes_set = true;
3681         fcoe->fcoe_rx_bytes = hst->fcp_input_megabytes * 1000000;
3682
3683         fcoe->fcoe_tx_bytes_set = true;
3684         fcoe->fcoe_tx_bytes = hst->fcp_output_megabytes * 1000000;
3685
3686         fcoe->crc_count_set = true;
3687         fcoe->crc_count = hst->invalid_crc_count;
3688
3689         fcoe->tx_abts_set = true;
3690         fcoe->tx_abts = hst->fcp_packet_aborts;
3691
3692         fcoe->tx_lun_rst_set = true;
3693         fcoe->tx_lun_rst = qedf->lun_resets;
3694
3695         fcoe->abort_task_sets_set = true;
3696         fcoe->abort_task_sets = qedf->packet_aborts;
3697
3698         fcoe->scsi_busy_set = true;
3699         fcoe->scsi_busy = qedf->busy;
3700
3701         fcoe->scsi_tsk_full_set = true;
3702         fcoe->scsi_tsk_full = qedf->task_set_fulls;
3703 }
3704
3705 /* Generic TLV data callback */
3706 void qedf_get_generic_tlv_data(void *dev, struct qed_generic_tlvs *data)
3707 {
3708         struct qedf_ctx *qedf;
3709
3710         if (!dev) {
3711                 QEDF_INFO(NULL, QEDF_LOG_EVT,
3712                           "dev is NULL so ignoring get_generic_tlv_data request.\n");
3713                 return;
3714         }
3715         qedf = (struct qedf_ctx *)dev;
3716
3717         memset(data, 0, sizeof(struct qed_generic_tlvs));
3718         ether_addr_copy(data->mac[0], qedf->mac);
3719 }
3720
3721 /*
3722  * Module Init/Remove
3723  */
3724
3725 static int __init qedf_init(void)
3726 {
3727         int ret;
3728
3729         /* If debug=1 passed, set the default log mask */
3730         if (qedf_debug == QEDF_LOG_DEFAULT)
3731                 qedf_debug = QEDF_DEFAULT_LOG_MASK;
3732
3733         /*
3734          * Check that default prio for FIP/FCoE traffic is between 0..7 if a
3735          * value has been set
3736          */
3737         if (qedf_default_prio > -1)
3738                 if (qedf_default_prio > 7) {
3739                         qedf_default_prio = QEDF_DEFAULT_PRIO;
3740                         QEDF_ERR(NULL, "FCoE/FIP priority out of range, resetting to %d.\n",
3741                             QEDF_DEFAULT_PRIO);
3742                 }
3743
3744         /* Print driver banner */
3745         QEDF_INFO(NULL, QEDF_LOG_INFO, "%s v%s.\n", QEDF_DESCR,
3746                    QEDF_VERSION);
3747
3748         /* Create kmem_cache for qedf_io_work structs */
3749         qedf_io_work_cache = kmem_cache_create("qedf_io_work_cache",
3750             sizeof(struct qedf_io_work), 0, SLAB_HWCACHE_ALIGN, NULL);
3751         if (qedf_io_work_cache == NULL) {
3752                 QEDF_ERR(NULL, "qedf_io_work_cache is NULL.\n");
3753                 goto err1;
3754         }
3755         QEDF_INFO(NULL, QEDF_LOG_DISC, "qedf_io_work_cache=%p.\n",
3756             qedf_io_work_cache);
3757
3758         qed_ops = qed_get_fcoe_ops();
3759         if (!qed_ops) {
3760                 QEDF_ERR(NULL, "Failed to get qed fcoe operations\n");
3761                 goto err1;
3762         }
3763
3764 #ifdef CONFIG_DEBUG_FS
3765         qedf_dbg_init("qedf");
3766 #endif
3767
3768         qedf_fc_transport_template =
3769             fc_attach_transport(&qedf_fc_transport_fn);
3770         if (!qedf_fc_transport_template) {
3771                 QEDF_ERR(NULL, "Could not register with FC transport\n");
3772                 goto err2;
3773         }
3774
3775         qedf_fc_vport_transport_template =
3776                 fc_attach_transport(&qedf_fc_vport_transport_fn);
3777         if (!qedf_fc_vport_transport_template) {
3778                 QEDF_ERR(NULL, "Could not register vport template with FC "
3779                           "transport\n");
3780                 goto err3;
3781         }
3782
3783         qedf_io_wq = create_workqueue("qedf_io_wq");
3784         if (!qedf_io_wq) {
3785                 QEDF_ERR(NULL, "Could not create qedf_io_wq.\n");
3786                 goto err4;
3787         }
3788
3789         qedf_cb_ops.get_login_failures = qedf_get_login_failures;
3790
3791         ret = pci_register_driver(&qedf_pci_driver);
3792         if (ret) {
3793                 QEDF_ERR(NULL, "Failed to register driver\n");
3794                 goto err5;
3795         }
3796
3797         return 0;
3798
3799 err5:
3800         destroy_workqueue(qedf_io_wq);
3801 err4:
3802         fc_release_transport(qedf_fc_vport_transport_template);
3803 err3:
3804         fc_release_transport(qedf_fc_transport_template);
3805 err2:
3806 #ifdef CONFIG_DEBUG_FS
3807         qedf_dbg_exit();
3808 #endif
3809         qed_put_fcoe_ops();
3810 err1:
3811         return -EINVAL;
3812 }
3813
3814 static void __exit qedf_cleanup(void)
3815 {
3816         pci_unregister_driver(&qedf_pci_driver);
3817
3818         destroy_workqueue(qedf_io_wq);
3819
3820         fc_release_transport(qedf_fc_vport_transport_template);
3821         fc_release_transport(qedf_fc_transport_template);
3822 #ifdef CONFIG_DEBUG_FS
3823         qedf_dbg_exit();
3824 #endif
3825         qed_put_fcoe_ops();
3826
3827         kmem_cache_destroy(qedf_io_work_cache);
3828 }
3829
3830 MODULE_LICENSE("GPL");
3831 MODULE_DESCRIPTION("QLogic QEDF 25/40/50/100Gb FCoE Driver");
3832 MODULE_AUTHOR("QLogic Corporation");
3833 MODULE_VERSION(QEDF_VERSION);
3834 module_init(qedf_init);
3835 module_exit(qedf_cleanup);