drivers/net/cnic.c

   1 /* cnic.c: Broadcom CNIC core network driver.
   2  *
   3  * Copyright (c) 2006-2009 Broadcom Corporation
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation.
   8  *
   9  * Original skeleton written by: John(Zongxi) Chen (zongxi@broadcom.com)
  10  * Modified and maintained by: Michael Chan <mchan@broadcom.com>
  11  */
  12
  13 #include <linux/module.h>
  14
  15 #include <linux/kernel.h>
  16 #include <linux/errno.h>
  17 #include <linux/list.h>
  18 #include <linux/slab.h>
  19 #include <linux/pci.h>
  20 #include <linux/init.h>
  21 #include <linux/netdevice.h>
  22 #include <linux/uio_driver.h>
  23 #include <linux/in.h>
  24 #include <linux/dma-mapping.h>
  25 #include <linux/delay.h>
  26 #include <linux/ethtool.h>
  27 #include <linux/if_vlan.h>
  28 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
  29 #define BCM_VLAN 1
  30 #endif
  31 #include <net/ip.h>
  32 #include <net/tcp.h>
  33 #include <net/route.h>
  34 #include <net/ipv6.h>
  35 #include <net/ip6_route.h>
  36 #include <scsi/iscsi_if.h>
  37
  38 #include "cnic_if.h"
  39 #include "bnx2.h"
  40 #include "cnic.h"
  41 #include "cnic_defs.h"
  42
  43 #define DRV_MODULE_NAME         "cnic"
  44 #define PFX DRV_MODULE_NAME     ": "
  45
  46 static char version[] __devinitdata =
  47         "Broadcom NetXtreme II CNIC Driver " DRV_MODULE_NAME " v" CNIC_MODULE_VERSION " (" CNIC_MODULE_RELDATE ")\n";
  48
  49 MODULE_AUTHOR("Michael Chan <mchan@broadcom.com> and John(Zongxi) "
  50               "Chen (zongxi@broadcom.com");
  51 MODULE_DESCRIPTION("Broadcom NetXtreme II CNIC Driver");
  52 MODULE_LICENSE("GPL");
  53 MODULE_VERSION(CNIC_MODULE_VERSION);
  54
  55 static LIST_HEAD(cnic_dev_list);
  56 static DEFINE_RWLOCK(cnic_dev_lock);
  57 static DEFINE_MUTEX(cnic_lock);
  58
  59 static struct cnic_ulp_ops *cnic_ulp_tbl[MAX_CNIC_ULP_TYPE];
  60
  61 static int cnic_service_bnx2(void *, void *);
  62 static int cnic_ctl(void *, struct cnic_ctl_info *);
  63
  64 static struct cnic_ops cnic_bnx2_ops = {
  65         .cnic_owner     = THIS_MODULE,
  66         .cnic_handler   = cnic_service_bnx2,
  67         .cnic_ctl       = cnic_ctl,
  68 };
  69
  70 static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *);
  71 static void cnic_init_bnx2_tx_ring(struct cnic_dev *);
  72 static void cnic_init_bnx2_rx_ring(struct cnic_dev *);
  73 static int cnic_cm_set_pg(struct cnic_sock *);
  74
  75 static int cnic_uio_open(struct uio_info *uinfo, struct inode *inode)
  76 {
  77         struct cnic_dev *dev = uinfo->priv;
  78         struct cnic_local *cp = dev->cnic_priv;
  79
  80         if (!capable(CAP_NET_ADMIN))
  81                 return -EPERM;
  82
  83         if (cp->uio_dev != -1)
  84                 return -EBUSY;
  85
  86         cp->uio_dev = iminor(inode);
  87
  88         cnic_init_bnx2_tx_ring(dev);
  89         cnic_init_bnx2_rx_ring(dev);
  90
  91         return 0;
  92 }
  93
  94 static int cnic_uio_close(struct uio_info *uinfo, struct inode *inode)
  95 {
  96         struct cnic_dev *dev = uinfo->priv;
  97         struct cnic_local *cp = dev->cnic_priv;
  98
  99         cnic_shutdown_bnx2_rx_ring(dev);
 100
 101         cp->uio_dev = -1;
 102         return 0;
 103 }
 104
 105 static inline void cnic_hold(struct cnic_dev *dev)
 106 {
 107         atomic_inc(&dev->ref_count);
 108 }
 109
 110 static inline void cnic_put(struct cnic_dev *dev)
 111 {
 112         atomic_dec(&dev->ref_count);
 113 }
 114
 115 static inline void csk_hold(struct cnic_sock *csk)
 116 {
 117         atomic_inc(&csk->ref_count);
 118 }
 119
 120 static inline void csk_put(struct cnic_sock *csk)
 121 {
 122         atomic_dec(&csk->ref_count);
 123 }
 124
 125 static struct cnic_dev *cnic_from_netdev(struct net_device *netdev)
 126 {
 127         struct cnic_dev *cdev;
 128
 129         read_lock(&cnic_dev_lock);
 130         list_for_each_entry(cdev, &cnic_dev_list, list) {
 131                 if (netdev == cdev->netdev) {
 132                         cnic_hold(cdev);
 133                         read_unlock(&cnic_dev_lock);
 134                         return cdev;
 135                 }
 136         }
 137         read_unlock(&cnic_dev_lock);
 138         return NULL;
 139 }
 140
 141 static inline void ulp_get(struct cnic_ulp_ops *ulp_ops)
 142 {
 143         atomic_inc(&ulp_ops->ref_count);
 144 }
 145
 146 static inline void ulp_put(struct cnic_ulp_ops *ulp_ops)
 147 {
 148         atomic_dec(&ulp_ops->ref_count);
 149 }
 150
 151 static void cnic_ctx_wr(struct cnic_dev *dev, u32 cid_addr, u32 off, u32 val)
 152 {
 153         struct cnic_local *cp = dev->cnic_priv;
 154         struct cnic_eth_dev *ethdev = cp->ethdev;
 155         struct drv_ctl_info info;
 156         struct drv_ctl_io *io = &info.data.io;
 157
 158         info.cmd = DRV_CTL_CTX_WR_CMD;
 159         io->cid_addr = cid_addr;
 160         io->offset = off;
 161         io->data = val;
 162         ethdev->drv_ctl(dev->netdev, &info);
 163 }
 164
 165 static void cnic_reg_wr_ind(struct cnic_dev *dev, u32 off, u32 val)
 166 {
 167         struct cnic_local *cp = dev->cnic_priv;
 168         struct cnic_eth_dev *ethdev = cp->ethdev;
 169         struct drv_ctl_info info;
 170         struct drv_ctl_io *io = &info.data.io;
 171
 172         info.cmd = DRV_CTL_IO_WR_CMD;
 173         io->offset = off;
 174         io->data = val;
 175         ethdev->drv_ctl(dev->netdev, &info);
 176 }
 177
 178 static u32 cnic_reg_rd_ind(struct cnic_dev *dev, u32 off)
 179 {
 180         struct cnic_local *cp = dev->cnic_priv;
 181         struct cnic_eth_dev *ethdev = cp->ethdev;
 182         struct drv_ctl_info info;
 183         struct drv_ctl_io *io = &info.data.io;
 184
 185         info.cmd = DRV_CTL_IO_RD_CMD;
 186         io->offset = off;
 187         ethdev->drv_ctl(dev->netdev, &info);
 188         return io->data;
 189 }
 190
 191 static int cnic_in_use(struct cnic_sock *csk)
 192 {
 193         return test_bit(SK_F_INUSE, &csk->flags);
 194 }
 195
 196 static void cnic_kwq_completion(struct cnic_dev *dev, u32 count)
 197 {
 198         struct cnic_local *cp = dev->cnic_priv;
 199         struct cnic_eth_dev *ethdev = cp->ethdev;
 200         struct drv_ctl_info info;
 201
 202         info.cmd = DRV_CTL_COMPLETION_CMD;
 203         info.data.comp.comp_count = count;
 204         ethdev->drv_ctl(dev->netdev, &info);
 205 }
 206
 207 static int cnic_send_nlmsg(struct cnic_local *cp, u32 type,
 208                            struct cnic_sock *csk)
 209 {
 210         struct iscsi_path path_req;
 211         char *buf = NULL;
 212         u16 len = 0;
 213         u32 msg_type = ISCSI_KEVENT_IF_DOWN;
 214         struct cnic_ulp_ops *ulp_ops;
 215
 216         if (cp->uio_dev == -1)
 217                 return -ENODEV;
 218
 219         if (csk) {
 220                 len = sizeof(path_req);
 221                 buf = (char *) &path_req;
 222                 memset(&path_req, 0, len);
 223
 224                 msg_type = ISCSI_KEVENT_PATH_REQ;
 225                 path_req.handle = (u64) csk->l5_cid;
 226                 if (test_bit(SK_F_IPV6, &csk->flags)) {
 227                         memcpy(&path_req.dst.v6_addr, &csk->dst_ip[0],
 228                                sizeof(struct in6_addr));
 229                         path_req.ip_addr_len = 16;
 230                 } else {
 231                         memcpy(&path_req.dst.v4_addr, &csk->dst_ip[0],
 232                                sizeof(struct in_addr));
 233                         path_req.ip_addr_len = 4;
 234                 }
 235                 path_req.vlan_id = csk->vlan_id;
 236                 path_req.pmtu = csk->mtu;
 237         }
 238
 239         rcu_read_lock();
 240         ulp_ops = rcu_dereference(cnic_ulp_tbl[CNIC_ULP_ISCSI]);
 241         if (ulp_ops)
 242                 ulp_ops->iscsi_nl_send_msg(cp->dev, msg_type, buf, len);
 243         rcu_read_unlock();
 244         return 0;
 245 }
 246
 247 static int cnic_iscsi_nl_msg_recv(struct cnic_dev *dev, u32 msg_type,
 248                                   char *buf, u16 len)
 249 {
 250         int rc = -EINVAL;
 251
 252         switch (msg_type) {
 253         case ISCSI_UEVENT_PATH_UPDATE: {
 254                 struct cnic_local *cp;
 255                 u32 l5_cid;
 256                 struct cnic_sock *csk;
 257                 struct iscsi_path *path_resp;
 258
 259                 if (len < sizeof(*path_resp))
 260                         break;
 261
 262                 path_resp = (struct iscsi_path *) buf;
 263                 cp = dev->cnic_priv;
 264                 l5_cid = (u32) path_resp->handle;
 265                 if (l5_cid >= MAX_CM_SK_TBL_SZ)
 266                         break;
 267
 268                 csk = &cp->csk_tbl[l5_cid];
 269                 csk_hold(csk);
 270                 if (cnic_in_use(csk)) {
 271                         memcpy(csk->ha, path_resp->mac_addr, 6);
 272                         if (test_bit(SK_F_IPV6, &csk->flags))
 273                                 memcpy(&csk->src_ip[0], &path_resp->src.v6_addr,
 274                                        sizeof(struct in6_addr));
 275                         else
 276                                 memcpy(&csk->src_ip[0], &path_resp->src.v4_addr,
 277                                        sizeof(struct in_addr));
 278                         if (is_valid_ether_addr(csk->ha))
 279                                 cnic_cm_set_pg(csk);
 280                 }
 281                 csk_put(csk);
 282                 rc = 0;
 283         }
 284         }
 285
 286         return rc;
 287 }
 288
 289 static int cnic_offld_prep(struct cnic_sock *csk)
 290 {
 291         if (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
 292                 return 0;
 293
 294         if (!test_bit(SK_F_CONNECT_START, &csk->flags)) {
 295                 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
 296                 return 0;
 297         }
 298
 299         return 1;
 300 }
 301
 302 static int cnic_close_prep(struct cnic_sock *csk)
 303 {
 304         clear_bit(SK_F_CONNECT_START, &csk->flags);
 305         smp_mb__after_clear_bit();
 306
 307         if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags)) {
 308                 while (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
 309                         msleep(1);
 310
 311                 return 1;
 312         }
 313         return 0;
 314 }
 315
 316 static int cnic_abort_prep(struct cnic_sock *csk)
 317 {
 318         clear_bit(SK_F_CONNECT_START, &csk->flags);
 319         smp_mb__after_clear_bit();
 320
 321         while (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
 322                 msleep(1);
 323
 324         if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags)) {
 325                 csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
 326                 return 1;
 327         }
 328
 329         return 0;
 330 }
 331
 332 static void cnic_uio_stop(void)
 333 {
 334         struct cnic_dev *dev;
 335
 336         read_lock(&cnic_dev_lock);
 337         list_for_each_entry(dev, &cnic_dev_list, list) {
 338                 struct cnic_local *cp = dev->cnic_priv;
 339
 340                 if (cp->cnic_uinfo)
 341                         cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
 342         }
 343         read_unlock(&cnic_dev_lock);
 344 }
 345
 346 int cnic_register_driver(int ulp_type, struct cnic_ulp_ops *ulp_ops)
 347 {
 348         struct cnic_dev *dev;
 349
 350         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 351                 printk(KERN_ERR PFX "cnic_register_driver: Bad type %d\n",
 352                        ulp_type);
 353                 return -EINVAL;
 354         }
 355         mutex_lock(&cnic_lock);
 356         if (cnic_ulp_tbl[ulp_type]) {
 357                 printk(KERN_ERR PFX "cnic_register_driver: Type %d has already "
 358                                     "been registered\n", ulp_type);
 359                 mutex_unlock(&cnic_lock);
 360                 return -EBUSY;
 361         }
 362
 363         read_lock(&cnic_dev_lock);
 364         list_for_each_entry(dev, &cnic_dev_list, list) {
 365                 struct cnic_local *cp = dev->cnic_priv;
 366
 367                 clear_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]);
 368         }
 369         read_unlock(&cnic_dev_lock);
 370
 371         atomic_set(&ulp_ops->ref_count, 0);
 372         rcu_assign_pointer(cnic_ulp_tbl[ulp_type], ulp_ops);
 373         mutex_unlock(&cnic_lock);
 374
 375         /* Prevent race conditions with netdev_event */
 376         rtnl_lock();
 377         read_lock(&cnic_dev_lock);
 378         list_for_each_entry(dev, &cnic_dev_list, list) {
 379                 struct cnic_local *cp = dev->cnic_priv;
 380
 381                 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]))
 382                         ulp_ops->cnic_init(dev);
 383         }
 384         read_unlock(&cnic_dev_lock);
 385         rtnl_unlock();
 386
 387         return 0;
 388 }
 389
 390 int cnic_unregister_driver(int ulp_type)
 391 {
 392         struct cnic_dev *dev;
 393         struct cnic_ulp_ops *ulp_ops;
 394         int i = 0;
 395
 396         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 397                 printk(KERN_ERR PFX "cnic_unregister_driver: Bad type %d\n",
 398                        ulp_type);
 399                 return -EINVAL;
 400         }
 401         mutex_lock(&cnic_lock);
 402         ulp_ops = cnic_ulp_tbl[ulp_type];
 403         if (!ulp_ops) {
 404                 printk(KERN_ERR PFX "cnic_unregister_driver: Type %d has not "
 405                                     "been registered\n", ulp_type);
 406                 goto out_unlock;
 407         }
 408         read_lock(&cnic_dev_lock);
 409         list_for_each_entry(dev, &cnic_dev_list, list) {
 410                 struct cnic_local *cp = dev->cnic_priv;
 411
 412                 if (rcu_dereference(cp->ulp_ops[ulp_type])) {
 413                         printk(KERN_ERR PFX "cnic_unregister_driver: Type %d "
 414                                "still has devices registered\n", ulp_type);
 415                         read_unlock(&cnic_dev_lock);
 416                         goto out_unlock;
 417                 }
 418         }
 419         read_unlock(&cnic_dev_lock);
 420
 421         if (ulp_type == CNIC_ULP_ISCSI)
 422                 cnic_uio_stop();
 423
 424         rcu_assign_pointer(cnic_ulp_tbl[ulp_type], NULL);
 425
 426         mutex_unlock(&cnic_lock);
 427         synchronize_rcu();
 428         while ((atomic_read(&ulp_ops->ref_count) != 0) && (i < 20)) {
 429                 msleep(100);
 430                 i++;
 431         }
 432
 433         if (atomic_read(&ulp_ops->ref_count) != 0)
 434                 printk(KERN_WARNING PFX "%s: Failed waiting for ref count to go"
 435                                         " to zero.\n", dev->netdev->name);
 436         return 0;
 437
 438 out_unlock:
 439         mutex_unlock(&cnic_lock);
 440         return -EINVAL;
 441 }
 442
 443 static int cnic_start_hw(struct cnic_dev *);
 444 static void cnic_stop_hw(struct cnic_dev *);
 445
 446 static int cnic_register_device(struct cnic_dev *dev, int ulp_type,
 447                                 void *ulp_ctx)
 448 {
 449         struct cnic_local *cp = dev->cnic_priv;
 450         struct cnic_ulp_ops *ulp_ops;
 451
 452         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 453                 printk(KERN_ERR PFX "cnic_register_device: Bad type %d\n",
 454                        ulp_type);
 455                 return -EINVAL;
 456         }
 457         mutex_lock(&cnic_lock);
 458         if (cnic_ulp_tbl[ulp_type] == NULL) {
 459                 printk(KERN_ERR PFX "cnic_register_device: Driver with type %d "
 460                                     "has not been registered\n", ulp_type);
 461                 mutex_unlock(&cnic_lock);
 462                 return -EAGAIN;
 463         }
 464         if (rcu_dereference(cp->ulp_ops[ulp_type])) {
 465                 printk(KERN_ERR PFX "cnic_register_device: Type %d has already "
 466                        "been registered to this device\n", ulp_type);
 467                 mutex_unlock(&cnic_lock);
 468                 return -EBUSY;
 469         }
 470
 471         clear_bit(ULP_F_START, &cp->ulp_flags[ulp_type]);
 472         cp->ulp_handle[ulp_type] = ulp_ctx;
 473         ulp_ops = cnic_ulp_tbl[ulp_type];
 474         rcu_assign_pointer(cp->ulp_ops[ulp_type], ulp_ops);
 475         cnic_hold(dev);
 476
 477         if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
 478                 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[ulp_type]))
 479                         ulp_ops->cnic_start(cp->ulp_handle[ulp_type]);
 480
 481         mutex_unlock(&cnic_lock);
 482
 483         return 0;
 484
 485 }
 486 EXPORT_SYMBOL(cnic_register_driver);
 487
 488 static int cnic_unregister_device(struct cnic_dev *dev, int ulp_type)
 489 {
 490         struct cnic_local *cp = dev->cnic_priv;
 491         int i = 0;
 492
 493         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 494                 printk(KERN_ERR PFX "cnic_unregister_device: Bad type %d\n",
 495                        ulp_type);
 496                 return -EINVAL;
 497         }
 498         mutex_lock(&cnic_lock);
 499         if (rcu_dereference(cp->ulp_ops[ulp_type])) {
 500                 rcu_assign_pointer(cp->ulp_ops[ulp_type], NULL);
 501                 cnic_put(dev);
 502         } else {
 503                 printk(KERN_ERR PFX "cnic_unregister_device: device not "
 504                        "registered to this ulp type %d\n", ulp_type);
 505                 mutex_unlock(&cnic_lock);
 506                 return -EINVAL;
 507         }
 508         mutex_unlock(&cnic_lock);
 509
 510         synchronize_rcu();
 511
 512         while (test_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[ulp_type]) &&
 513                i < 20) {
 514                 msleep(100);
 515                 i++;
 516         }
 517         if (test_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[ulp_type]))
 518                 printk(KERN_WARNING PFX "%s: Failed waiting for ULP up call"
 519                                         " to complete.\n", dev->netdev->name);
 520
 521         return 0;
 522 }
 523 EXPORT_SYMBOL(cnic_unregister_driver);
 524
 525 static int cnic_init_id_tbl(struct cnic_id_tbl *id_tbl, u32 size, u32 start_id)
 526 {
 527         id_tbl->start = start_id;
 528         id_tbl->max = size;
 529         id_tbl->next = 0;
 530         spin_lock_init(&id_tbl->lock);
 531         id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
 532         if (!id_tbl->table)
 533                 return -ENOMEM;
 534
 535         return 0;
 536 }
 537
 538 static void cnic_free_id_tbl(struct cnic_id_tbl *id_tbl)
 539 {
 540         kfree(id_tbl->table);
 541         id_tbl->table = NULL;
 542 }
 543
 544 static int cnic_alloc_id(struct cnic_id_tbl *id_tbl, u32 id)
 545 {
 546         int ret = -1;
 547
 548         id -= id_tbl->start;
 549         if (id >= id_tbl->max)
 550                 return ret;
 551
 552         spin_lock(&id_tbl->lock);
 553         if (!test_bit(id, id_tbl->table)) {
 554                 set_bit(id, id_tbl->table);
 555                 ret = 0;
 556         }
 557         spin_unlock(&id_tbl->lock);
 558         return ret;
 559 }
 560
 561 /* Returns -1 if not successful */
 562 static u32 cnic_alloc_new_id(struct cnic_id_tbl *id_tbl)
 563 {
 564         u32 id;
 565
 566         spin_lock(&id_tbl->lock);
 567         id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
 568         if (id >= id_tbl->max) {
 569                 id = -1;
 570                 if (id_tbl->next != 0) {
 571                         id = find_first_zero_bit(id_tbl->table, id_tbl->next);
 572                         if (id >= id_tbl->next)
 573                                 id = -1;
 574                 }
 575         }
 576
 577         if (id < id_tbl->max) {
 578                 set_bit(id, id_tbl->table);
 579                 id_tbl->next = (id + 1) & (id_tbl->max - 1);
 580                 id += id_tbl->start;
 581         }
 582
 583         spin_unlock(&id_tbl->lock);
 584
 585         return id;
 586 }
 587
 588 static void cnic_free_id(struct cnic_id_tbl *id_tbl, u32 id)
 589 {
 590         if (id == -1)
 591                 return;
 592
 593         id -= id_tbl->start;
 594         if (id >= id_tbl->max)
 595                 return;
 596
 597         clear_bit(id, id_tbl->table);
 598 }
 599
 600 static void cnic_free_dma(struct cnic_dev *dev, struct cnic_dma *dma)
 601 {
 602         int i;
 603
 604         if (!dma->pg_arr)
 605                 return;
 606
 607         for (i = 0; i < dma->num_pages; i++) {
 608                 if (dma->pg_arr[i]) {
 609                         pci_free_consistent(dev->pcidev, BCM_PAGE_SIZE,
 610                                             dma->pg_arr[i], dma->pg_map_arr[i]);
 611                         dma->pg_arr[i] = NULL;
 612                 }
 613         }
 614         if (dma->pgtbl) {
 615                 pci_free_consistent(dev->pcidev, dma->pgtbl_size,
 616                                     dma->pgtbl, dma->pgtbl_map);
 617                 dma->pgtbl = NULL;
 618         }
 619         kfree(dma->pg_arr);
 620         dma->pg_arr = NULL;
 621         dma->num_pages = 0;
 622 }
 623
 624 static void cnic_setup_page_tbl(struct cnic_dev *dev, struct cnic_dma *dma)
 625 {
 626         int i;
 627         u32 *page_table = dma->pgtbl;
 628
 629         for (i = 0; i < dma->num_pages; i++) {
 630                 /* Each entry needs to be in big endian format. */
 631                 *page_table = (u32) ((u64) dma->pg_map_arr[i] >> 32);
 632                 page_table++;
 633                 *page_table = (u32) dma->pg_map_arr[i];
 634                 page_table++;
 635         }
 636 }
 637
 638 static int cnic_alloc_dma(struct cnic_dev *dev, struct cnic_dma *dma,
 639                           int pages, int use_pg_tbl)
 640 {
 641         int i, size;
 642         struct cnic_local *cp = dev->cnic_priv;
 643
 644         size = pages * (sizeof(void *) + sizeof(dma_addr_t));
 645         dma->pg_arr = kzalloc(size, GFP_ATOMIC);
 646         if (dma->pg_arr == NULL)
 647                 return -ENOMEM;
 648
 649         dma->pg_map_arr = (dma_addr_t *) (dma->pg_arr + pages);
 650         dma->num_pages = pages;
 651
 652         for (i = 0; i < pages; i++) {
 653                 dma->pg_arr[i] = pci_alloc_consistent(dev->pcidev,
 654                                                       BCM_PAGE_SIZE,
 655                                                       &dma->pg_map_arr[i]);
 656                 if (dma->pg_arr[i] == NULL)
 657                         goto error;
 658         }
 659         if (!use_pg_tbl)
 660                 return 0;
 661
 662         dma->pgtbl_size = ((pages * 8) + BCM_PAGE_SIZE - 1) &
 663                           ~(BCM_PAGE_SIZE - 1);
 664         dma->pgtbl = pci_alloc_consistent(dev->pcidev, dma->pgtbl_size,
 665                                           &dma->pgtbl_map);
 666         if (dma->pgtbl == NULL)
 667                 goto error;
 668
 669         cp->setup_pgtbl(dev, dma);
 670
 671         return 0;
 672
 673 error:
 674         cnic_free_dma(dev, dma);
 675         return -ENOMEM;
 676 }
 677
 678 static void cnic_free_resc(struct cnic_dev *dev)
 679 {
 680         struct cnic_local *cp = dev->cnic_priv;
 681         int i = 0;
 682
 683         if (cp->cnic_uinfo) {
 684                 while (cp->uio_dev != -1 && i < 15) {
 685                         msleep(100);
 686                         i++;
 687                 }
 688                 uio_unregister_device(cp->cnic_uinfo);
 689                 kfree(cp->cnic_uinfo);
 690                 cp->cnic_uinfo = NULL;
 691         }
 692
 693         if (cp->l2_buf) {
 694                 pci_free_consistent(dev->pcidev, cp->l2_buf_size,
 695                                     cp->l2_buf, cp->l2_buf_map);
 696                 cp->l2_buf = NULL;
 697         }
 698
 699         if (cp->l2_ring) {
 700                 pci_free_consistent(dev->pcidev, cp->l2_ring_size,
 701                                     cp->l2_ring, cp->l2_ring_map);
 702                 cp->l2_ring = NULL;
 703         }
 704
 705         for (i = 0; i < cp->ctx_blks; i++) {
 706                 if (cp->ctx_arr[i].ctx) {
 707                         pci_free_consistent(dev->pcidev, cp->ctx_blk_size,
 708                                             cp->ctx_arr[i].ctx,
 709                                             cp->ctx_arr[i].mapping);
 710                         cp->ctx_arr[i].ctx = NULL;
 711                 }
 712         }
 713         kfree(cp->ctx_arr);
 714         cp->ctx_arr = NULL;
 715         cp->ctx_blks = 0;
 716
 717         cnic_free_dma(dev, &cp->gbl_buf_info);
 718         cnic_free_dma(dev, &cp->conn_buf_info);
 719         cnic_free_dma(dev, &cp->kwq_info);
 720         cnic_free_dma(dev, &cp->kcq_info);
 721         kfree(cp->iscsi_tbl);
 722         cp->iscsi_tbl = NULL;
 723         kfree(cp->ctx_tbl);
 724         cp->ctx_tbl = NULL;
 725
 726         cnic_free_id_tbl(&cp->cid_tbl);
 727 }
 728
 729 static int cnic_alloc_context(struct cnic_dev *dev)
 730 {
 731         struct cnic_local *cp = dev->cnic_priv;
 732
 733         if (CHIP_NUM(cp) == CHIP_NUM_5709) {
 734                 int i, k, arr_size;
 735
 736                 cp->ctx_blk_size = BCM_PAGE_SIZE;
 737                 cp->cids_per_blk = BCM_PAGE_SIZE / 128;
 738                 arr_size = BNX2_MAX_CID / cp->cids_per_blk *
 739                            sizeof(struct cnic_ctx);
 740                 cp->ctx_arr = kzalloc(arr_size, GFP_KERNEL);
 741                 if (cp->ctx_arr == NULL)
 742                         return -ENOMEM;
 743
 744                 k = 0;
 745                 for (i = 0; i < 2; i++) {
 746                         u32 j, reg, off, lo, hi;
 747
 748                         if (i == 0)
 749                                 off = BNX2_PG_CTX_MAP;
 750                         else
 751                                 off = BNX2_ISCSI_CTX_MAP;
 752
 753                         reg = cnic_reg_rd_ind(dev, off);
 754                         lo = reg >> 16;
 755                         hi = reg & 0xffff;
 756                         for (j = lo; j < hi; j += cp->cids_per_blk, k++)
 757                                 cp->ctx_arr[k].cid = j;
 758                 }
 759
 760                 cp->ctx_blks = k;
 761                 if (cp->ctx_blks >= (BNX2_MAX_CID / cp->cids_per_blk)) {
 762                         cp->ctx_blks = 0;
 763                         return -ENOMEM;
 764                 }
 765
 766                 for (i = 0; i < cp->ctx_blks; i++) {
 767                         cp->ctx_arr[i].ctx =
 768                                 pci_alloc_consistent(dev->pcidev, BCM_PAGE_SIZE,
 769                                                      &cp->ctx_arr[i].mapping);
 770                         if (cp->ctx_arr[i].ctx == NULL)
 771                                 return -ENOMEM;
 772                 }
 773         }
 774         return 0;
 775 }
 776
 777 static int cnic_alloc_l2_rings(struct cnic_dev *dev, int pages)
 778 {
 779         struct cnic_local *cp = dev->cnic_priv;
 780
 781         cp->l2_ring_size = pages * BCM_PAGE_SIZE;
 782         cp->l2_ring = pci_alloc_consistent(dev->pcidev, cp->l2_ring_size,
 783                                            &cp->l2_ring_map);
 784         if (!cp->l2_ring)
 785                 return -ENOMEM;
 786
 787         cp->l2_buf_size = (cp->l2_rx_ring_size + 1) * cp->l2_single_buf_size;
 788         cp->l2_buf_size = PAGE_ALIGN(cp->l2_buf_size);
 789         cp->l2_buf = pci_alloc_consistent(dev->pcidev, cp->l2_buf_size,
 790                                            &cp->l2_buf_map);
 791         if (!cp->l2_buf)
 792                 return -ENOMEM;
 793
 794         return 0;
 795 }
 796
 797 static int cnic_alloc_uio(struct cnic_dev *dev) {
 798         struct cnic_local *cp = dev->cnic_priv;
 799         struct uio_info *uinfo;
 800         int ret;
 801
 802         uinfo = kzalloc(sizeof(*uinfo), GFP_ATOMIC);
 803         if (!uinfo)
 804                 return -ENOMEM;
 805
 806         uinfo->mem[0].addr = dev->netdev->base_addr;
 807         uinfo->mem[0].internal_addr = dev->regview;
 808         uinfo->mem[0].size = dev->netdev->mem_end - dev->netdev->mem_start;
 809         uinfo->mem[0].memtype = UIO_MEM_PHYS;
 810
 811         uinfo->mem[1].addr = (unsigned long) cp->status_blk & PAGE_MASK;
 812         if (test_bit(CNIC_F_BNX2_CLASS, &dev->flags)) {
 813                 if (cp->ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX)
 814                         uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE * 9;
 815                 else
 816                         uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE;
 817
 818                 uinfo->name = "bnx2_cnic";
 819         }
 820
 821         uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
 822
 823         uinfo->mem[2].addr = (unsigned long) cp->l2_ring;
 824         uinfo->mem[2].size = cp->l2_ring_size;
 825         uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
 826
 827         uinfo->mem[3].addr = (unsigned long) cp->l2_buf;
 828         uinfo->mem[3].size = cp->l2_buf_size;
 829         uinfo->mem[3].memtype = UIO_MEM_LOGICAL;
 830
 831         uinfo->version = CNIC_MODULE_VERSION;
 832         uinfo->irq = UIO_IRQ_CUSTOM;
 833
 834         uinfo->open = cnic_uio_open;
 835         uinfo->release = cnic_uio_close;
 836
 837         uinfo->priv = dev;
 838
 839         ret = uio_register_device(&dev->pcidev->dev, uinfo);
 840         if (ret) {
 841                 kfree(uinfo);
 842                 return ret;
 843         }
 844
 845         cp->cnic_uinfo = uinfo;
 846         return 0;
 847 }
 848
 849 static int cnic_alloc_bnx2_resc(struct cnic_dev *dev)
 850 {
 851         struct cnic_local *cp = dev->cnic_priv;
 852         int ret;
 853
 854         ret = cnic_alloc_dma(dev, &cp->kwq_info, KWQ_PAGE_CNT, 1);
 855         if (ret)
 856                 goto error;
 857         cp->kwq = (struct kwqe **) cp->kwq_info.pg_arr;
 858
 859         ret = cnic_alloc_dma(dev, &cp->kcq_info, KCQ_PAGE_CNT, 1);
 860         if (ret)
 861                 goto error;
 862         cp->kcq = (struct kcqe **) cp->kcq_info.pg_arr;
 863
 864         ret = cnic_alloc_context(dev);
 865         if (ret)
 866                 goto error;
 867
 868         ret = cnic_alloc_l2_rings(dev, 2);
 869         if (ret)
 870                 goto error;
 871
 872         ret = cnic_alloc_uio(dev);
 873         if (ret)
 874                 goto error;
 875
 876         return 0;
 877
 878 error:
 879         cnic_free_resc(dev);
 880         return ret;
 881 }
 882
 883 static inline u32 cnic_kwq_avail(struct cnic_local *cp)
 884 {
 885         return cp->max_kwq_idx -
 886                 ((cp->kwq_prod_idx - cp->kwq_con_idx) & cp->max_kwq_idx);
 887 }
 888
 889 static int cnic_submit_bnx2_kwqes(struct cnic_dev *dev, struct kwqe *wqes[],
 890                                   u32 num_wqes)
 891 {
 892         struct cnic_local *cp = dev->cnic_priv;
 893         struct kwqe *prod_qe;
 894         u16 prod, sw_prod, i;
 895
 896         if (!test_bit(CNIC_F_CNIC_UP, &dev->flags))
 897                 return -EAGAIN;         /* bnx2 is down */
 898
 899         spin_lock_bh(&cp->cnic_ulp_lock);
 900         if (num_wqes > cnic_kwq_avail(cp) &&
 901             !(cp->cnic_local_flags & CNIC_LCL_FL_KWQ_INIT)) {
 902                 spin_unlock_bh(&cp->cnic_ulp_lock);
 903                 return -EAGAIN;
 904         }
 905
 906         cp->cnic_local_flags &= ~CNIC_LCL_FL_KWQ_INIT;
 907
 908         prod = cp->kwq_prod_idx;
 909         sw_prod = prod & MAX_KWQ_IDX;
 910         for (i = 0; i < num_wqes; i++) {
 911                 prod_qe = &cp->kwq[KWQ_PG(sw_prod)][KWQ_IDX(sw_prod)];
 912                 memcpy(prod_qe, wqes[i], sizeof(struct kwqe));
 913                 prod++;
 914                 sw_prod = prod & MAX_KWQ_IDX;
 915         }
 916         cp->kwq_prod_idx = prod;
 917
 918         CNIC_WR16(dev, cp->kwq_io_addr, cp->kwq_prod_idx);
 919
 920         spin_unlock_bh(&cp->cnic_ulp_lock);
 921         return 0;
 922 }
 923
 924 static void service_kcqes(struct cnic_dev *dev, int num_cqes)
 925 {
 926         struct cnic_local *cp = dev->cnic_priv;
 927         int i, j;
 928
 929         i = 0;
 930         j = 1;
 931         while (num_cqes) {
 932                 struct cnic_ulp_ops *ulp_ops;
 933                 int ulp_type;
 934                 u32 kcqe_op_flag = cp->completed_kcq[i]->kcqe_op_flag;
 935                 u32 kcqe_layer = kcqe_op_flag & KCQE_FLAGS_LAYER_MASK;
 936
 937                 if (unlikely(kcqe_op_flag & KCQE_RAMROD_COMPLETION))
 938                         cnic_kwq_completion(dev, 1);
 939
 940                 while (j < num_cqes) {
 941                         u32 next_op = cp->completed_kcq[i + j]->kcqe_op_flag;
 942
 943                         if ((next_op & KCQE_FLAGS_LAYER_MASK) != kcqe_layer)
 944                                 break;
 945
 946                         if (unlikely(next_op & KCQE_RAMROD_COMPLETION))
 947                                 cnic_kwq_completion(dev, 1);
 948                         j++;
 949                 }
 950
 951                 if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_RDMA)
 952                         ulp_type = CNIC_ULP_RDMA;
 953                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_ISCSI)
 954                         ulp_type = CNIC_ULP_ISCSI;
 955                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L4)
 956                         ulp_type = CNIC_ULP_L4;
 957                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L2)
 958                         goto end;
 959                 else {
 960                         printk(KERN_ERR PFX "%s: Unknown type of KCQE(0x%x)\n",
 961                                dev->netdev->name, kcqe_op_flag);
 962                         goto end;
 963                 }
 964
 965                 rcu_read_lock();
 966                 ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
 967                 if (likely(ulp_ops)) {
 968                         ulp_ops->indicate_kcqes(cp->ulp_handle[ulp_type],
 969                                                   cp->completed_kcq + i, j);
 970                 }
 971                 rcu_read_unlock();
 972 end:
 973                 num_cqes -= j;
 974                 i += j;
 975                 j = 1;
 976         }
 977         return;
 978 }
 979
 980 static u16 cnic_bnx2_next_idx(u16 idx)
 981 {
 982         return idx + 1;
 983 }
 984
 985 static u16 cnic_bnx2_hw_idx(u16 idx)
 986 {
 987         return idx;
 988 }
 989
 990 static int cnic_get_kcqes(struct cnic_dev *dev, u16 hw_prod, u16 *sw_prod)
 991 {
 992         struct cnic_local *cp = dev->cnic_priv;
 993         u16 i, ri, last;
 994         struct kcqe *kcqe;
 995         int kcqe_cnt = 0, last_cnt = 0;
 996
 997         i = ri = last = *sw_prod;
 998         ri &= MAX_KCQ_IDX;
 999
1000         while ((i != hw_prod) && (kcqe_cnt < MAX_COMPLETED_KCQE)) {
1001                 kcqe = &cp->kcq[KCQ_PG(ri)][KCQ_IDX(ri)];
1002                 cp->completed_kcq[kcqe_cnt++] = kcqe;
1003                 i = cp->next_idx(i);
1004                 ri = i & MAX_KCQ_IDX;
1005                 if (likely(!(kcqe->kcqe_op_flag & KCQE_FLAGS_NEXT))) {
1006                         last_cnt = kcqe_cnt;
1007                         last = i;
1008                 }
1009         }
1010
1011         *sw_prod = last;
1012         return last_cnt;
1013 }
1014
1015 static void cnic_chk_bnx2_pkt_rings(struct cnic_local *cp)
1016 {
1017         u16 rx_cons = *cp->rx_cons_ptr;
1018         u16 tx_cons = *cp->tx_cons_ptr;
1019
1020         if (cp->tx_cons != tx_cons || cp->rx_cons != rx_cons) {
1021                 cp->tx_cons = tx_cons;
1022                 cp->rx_cons = rx_cons;
1023                 uio_event_notify(cp->cnic_uinfo);
1024         }
1025 }
1026
1027 static int cnic_service_bnx2(void *data, void *status_blk)
1028 {
1029         struct cnic_dev *dev = data;
1030         struct status_block *sblk = status_blk;
1031         struct cnic_local *cp = dev->cnic_priv;
1032         u32 status_idx = sblk->status_idx;
1033         u16 hw_prod, sw_prod;
1034         int kcqe_cnt;
1035
1036         if (unlikely(!test_bit(CNIC_F_CNIC_UP, &dev->flags)))
1037                 return status_idx;
1038
1039         cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
1040
1041         hw_prod = sblk->status_completion_producer_index;
1042         sw_prod = cp->kcq_prod_idx;
1043         while (sw_prod != hw_prod) {
1044                 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
1045                 if (kcqe_cnt == 0)
1046                         goto done;
1047
1048                 service_kcqes(dev, kcqe_cnt);
1049
1050                 /* Tell compiler that status_blk fields can change. */
1051                 barrier();
1052                 if (status_idx != sblk->status_idx) {
1053                         status_idx = sblk->status_idx;
1054                         cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
1055                         hw_prod = sblk->status_completion_producer_index;
1056                 } else
1057                         break;
1058         }
1059
1060 done:
1061         CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
1062
1063         cp->kcq_prod_idx = sw_prod;
1064
1065         cnic_chk_bnx2_pkt_rings(cp);
1066         return status_idx;
1067 }
1068
1069 static void cnic_service_bnx2_msix(unsigned long data)
1070 {
1071         struct cnic_dev *dev = (struct cnic_dev *) data;
1072         struct cnic_local *cp = dev->cnic_priv;
1073         struct status_block_msix *status_blk = cp->bnx2_status_blk;
1074         u32 status_idx = status_blk->status_idx;
1075         u16 hw_prod, sw_prod;
1076         int kcqe_cnt;
1077
1078         cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1079
1080         hw_prod = status_blk->status_completion_producer_index;
1081         sw_prod = cp->kcq_prod_idx;
1082         while (sw_prod != hw_prod) {
1083                 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
1084                 if (kcqe_cnt == 0)
1085                         goto done;
1086
1087                 service_kcqes(dev, kcqe_cnt);
1088
1089                 /* Tell compiler that status_blk fields can change. */
1090                 barrier();
1091                 if (status_idx != status_blk->status_idx) {
1092                         status_idx = status_blk->status_idx;
1093                         cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1094                         hw_prod = status_blk->status_completion_producer_index;
1095                 } else
1096                         break;
1097         }
1098
1099 done:
1100         CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
1101         cp->kcq_prod_idx = sw_prod;
1102
1103         cnic_chk_bnx2_pkt_rings(cp);
1104
1105         cp->last_status_idx = status_idx;
1106         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
1107                 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
1108 }
1109
1110 static irqreturn_t cnic_irq(int irq, void *dev_instance)
1111 {
1112         struct cnic_dev *dev = dev_instance;
1113         struct cnic_local *cp = dev->cnic_priv;
1114         u16 prod = cp->kcq_prod_idx & MAX_KCQ_IDX;
1115
1116         if (cp->ack_int)
1117                 cp->ack_int(dev);
1118
1119         prefetch(cp->status_blk);
1120         prefetch(&cp->kcq[KCQ_PG(prod)][KCQ_IDX(prod)]);
1121
1122         if (likely(test_bit(CNIC_F_CNIC_UP, &dev->flags)))
1123                 tasklet_schedule(&cp->cnic_irq_task);
1124
1125         return IRQ_HANDLED;
1126 }
1127
1128 static void cnic_ulp_stop(struct cnic_dev *dev)
1129 {
1130         struct cnic_local *cp = dev->cnic_priv;
1131         int if_type;
1132
1133         if (cp->cnic_uinfo)
1134                 cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
1135
1136         for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
1137                 struct cnic_ulp_ops *ulp_ops;
1138
1139                 mutex_lock(&cnic_lock);
1140                 ulp_ops = cp->ulp_ops[if_type];
1141                 if (!ulp_ops) {
1142                         mutex_unlock(&cnic_lock);
1143                         continue;
1144                 }
1145                 set_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
1146                 mutex_unlock(&cnic_lock);
1147
1148                 if (test_and_clear_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1149                         ulp_ops->cnic_stop(cp->ulp_handle[if_type]);
1150
1151                 clear_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
1152         }
1153 }
1154
1155 static void cnic_ulp_start(struct cnic_dev *dev)
1156 {
1157         struct cnic_local *cp = dev->cnic_priv;
1158         int if_type;
1159
1160         for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
1161                 struct cnic_ulp_ops *ulp_ops;
1162
1163                 mutex_lock(&cnic_lock);
1164                 ulp_ops = cp->ulp_ops[if_type];
1165                 if (!ulp_ops || !ulp_ops->cnic_start) {
1166                         mutex_unlock(&cnic_lock);
1167                         continue;
1168                 }
1169                 set_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
1170                 mutex_unlock(&cnic_lock);
1171
1172                 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1173                         ulp_ops->cnic_start(cp->ulp_handle[if_type]);
1174
1175                 clear_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
1176         }
1177 }
1178
1179 static int cnic_ctl(void *data, struct cnic_ctl_info *info)
1180 {
1181         struct cnic_dev *dev = data;
1182
1183         switch (info->cmd) {
1184         case CNIC_CTL_STOP_CMD:
1185                 cnic_hold(dev);
1186
1187                 cnic_ulp_stop(dev);
1188                 cnic_stop_hw(dev);
1189
1190                 cnic_put(dev);
1191                 break;
1192         case CNIC_CTL_START_CMD:
1193                 cnic_hold(dev);
1194
1195                 if (!cnic_start_hw(dev))
1196                         cnic_ulp_start(dev);
1197
1198                 cnic_put(dev);
1199                 break;
1200         default:
1201                 return -EINVAL;
1202         }
1203         return 0;
1204 }
1205
1206 static void cnic_ulp_init(struct cnic_dev *dev)
1207 {
1208         int i;
1209         struct cnic_local *cp = dev->cnic_priv;
1210
1211         for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1212                 struct cnic_ulp_ops *ulp_ops;
1213
1214                 mutex_lock(&cnic_lock);
1215                 ulp_ops = cnic_ulp_tbl[i];
1216                 if (!ulp_ops || !ulp_ops->cnic_init) {
1217                         mutex_unlock(&cnic_lock);
1218                         continue;
1219                 }
1220                 ulp_get(ulp_ops);
1221                 mutex_unlock(&cnic_lock);
1222
1223                 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1224                         ulp_ops->cnic_init(dev);
1225
1226                 ulp_put(ulp_ops);
1227         }
1228 }
1229
1230 static void cnic_ulp_exit(struct cnic_dev *dev)
1231 {
1232         int i;
1233         struct cnic_local *cp = dev->cnic_priv;
1234
1235         for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1236                 struct cnic_ulp_ops *ulp_ops;
1237
1238                 mutex_lock(&cnic_lock);
1239                 ulp_ops = cnic_ulp_tbl[i];
1240                 if (!ulp_ops || !ulp_ops->cnic_exit) {
1241                         mutex_unlock(&cnic_lock);
1242                         continue;
1243                 }
1244                 ulp_get(ulp_ops);
1245                 mutex_unlock(&cnic_lock);
1246
1247                 if (test_and_clear_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1248                         ulp_ops->cnic_exit(dev);
1249
1250                 ulp_put(ulp_ops);
1251         }
1252 }
1253
1254 static int cnic_cm_offload_pg(struct cnic_sock *csk)
1255 {
1256         struct cnic_dev *dev = csk->dev;
1257         struct l4_kwq_offload_pg *l4kwqe;
1258         struct kwqe *wqes[1];
1259
1260         l4kwqe = (struct l4_kwq_offload_pg *) &csk->kwqe1;
1261         memset(l4kwqe, 0, sizeof(*l4kwqe));
1262         wqes[0] = (struct kwqe *) l4kwqe;
1263
1264         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_OFFLOAD_PG;
1265         l4kwqe->flags =
1266                 L4_LAYER_CODE << L4_KWQ_OFFLOAD_PG_LAYER_CODE_SHIFT;
1267         l4kwqe->l2hdr_nbytes = ETH_HLEN;
1268
1269         l4kwqe->da0 = csk->ha[0];
1270         l4kwqe->da1 = csk->ha[1];
1271         l4kwqe->da2 = csk->ha[2];
1272         l4kwqe->da3 = csk->ha[3];
1273         l4kwqe->da4 = csk->ha[4];
1274         l4kwqe->da5 = csk->ha[5];
1275
1276         l4kwqe->sa0 = dev->mac_addr[0];
1277         l4kwqe->sa1 = dev->mac_addr[1];
1278         l4kwqe->sa2 = dev->mac_addr[2];
1279         l4kwqe->sa3 = dev->mac_addr[3];
1280         l4kwqe->sa4 = dev->mac_addr[4];
1281         l4kwqe->sa5 = dev->mac_addr[5];
1282
1283         l4kwqe->etype = ETH_P_IP;
1284         l4kwqe->ipid_count = DEF_IPID_COUNT;
1285         l4kwqe->host_opaque = csk->l5_cid;
1286
1287         if (csk->vlan_id) {
1288                 l4kwqe->pg_flags |= L4_KWQ_OFFLOAD_PG_VLAN_TAGGING;
1289                 l4kwqe->vlan_tag = csk->vlan_id;
1290                 l4kwqe->l2hdr_nbytes += 4;
1291         }
1292
1293         return dev->submit_kwqes(dev, wqes, 1);
1294 }
1295
1296 static int cnic_cm_update_pg(struct cnic_sock *csk)
1297 {
1298         struct cnic_dev *dev = csk->dev;
1299         struct l4_kwq_update_pg *l4kwqe;
1300         struct kwqe *wqes[1];
1301
1302         l4kwqe = (struct l4_kwq_update_pg *) &csk->kwqe1;
1303         memset(l4kwqe, 0, sizeof(*l4kwqe));
1304         wqes[0] = (struct kwqe *) l4kwqe;
1305
1306         l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPDATE_PG;
1307         l4kwqe->flags =
1308                 L4_LAYER_CODE << L4_KWQ_UPDATE_PG_LAYER_CODE_SHIFT;
1309         l4kwqe->pg_cid = csk->pg_cid;
1310
1311         l4kwqe->da0 = csk->ha[0];
1312         l4kwqe->da1 = csk->ha[1];
1313         l4kwqe->da2 = csk->ha[2];
1314         l4kwqe->da3 = csk->ha[3];
1315         l4kwqe->da4 = csk->ha[4];
1316         l4kwqe->da5 = csk->ha[5];
1317
1318         l4kwqe->pg_host_opaque = csk->l5_cid;
1319         l4kwqe->pg_valids = L4_KWQ_UPDATE_PG_VALIDS_DA;
1320
1321         return dev->submit_kwqes(dev, wqes, 1);
1322 }
1323
1324 static int cnic_cm_upload_pg(struct cnic_sock *csk)
1325 {
1326         struct cnic_dev *dev = csk->dev;
1327         struct l4_kwq_upload *l4kwqe;
1328         struct kwqe *wqes[1];
1329
1330         l4kwqe = (struct l4_kwq_upload *) &csk->kwqe1;
1331         memset(l4kwqe, 0, sizeof(*l4kwqe));
1332         wqes[0] = (struct kwqe *) l4kwqe;
1333
1334         l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPLOAD_PG;
1335         l4kwqe->flags =
1336                 L4_LAYER_CODE << L4_KWQ_UPLOAD_LAYER_CODE_SHIFT;
1337         l4kwqe->cid = csk->pg_cid;
1338
1339         return dev->submit_kwqes(dev, wqes, 1);
1340 }
1341
1342 static int cnic_cm_conn_req(struct cnic_sock *csk)
1343 {
1344         struct cnic_dev *dev = csk->dev;
1345         struct l4_kwq_connect_req1 *l4kwqe1;
1346         struct l4_kwq_connect_req2 *l4kwqe2;
1347         struct l4_kwq_connect_req3 *l4kwqe3;
1348         struct kwqe *wqes[3];
1349         u8 tcp_flags = 0;
1350         int num_wqes = 2;
1351
1352         l4kwqe1 = (struct l4_kwq_connect_req1 *) &csk->kwqe1;
1353         l4kwqe2 = (struct l4_kwq_connect_req2 *) &csk->kwqe2;
1354         l4kwqe3 = (struct l4_kwq_connect_req3 *) &csk->kwqe3;
1355         memset(l4kwqe1, 0, sizeof(*l4kwqe1));
1356         memset(l4kwqe2, 0, sizeof(*l4kwqe2));
1357         memset(l4kwqe3, 0, sizeof(*l4kwqe3));
1358
1359         l4kwqe3->op_code = L4_KWQE_OPCODE_VALUE_CONNECT3;
1360         l4kwqe3->flags =
1361                 L4_LAYER_CODE << L4_KWQ_CONNECT_REQ3_LAYER_CODE_SHIFT;
1362         l4kwqe3->ka_timeout = csk->ka_timeout;
1363         l4kwqe3->ka_interval = csk->ka_interval;
1364         l4kwqe3->ka_max_probe_count = csk->ka_max_probe_count;
1365         l4kwqe3->tos = csk->tos;
1366         l4kwqe3->ttl = csk->ttl;
1367         l4kwqe3->snd_seq_scale = csk->snd_seq_scale;
1368         l4kwqe3->pmtu = csk->mtu;
1369         l4kwqe3->rcv_buf = csk->rcv_buf;
1370         l4kwqe3->snd_buf = csk->snd_buf;
1371         l4kwqe3->seed = csk->seed;
1372
1373         wqes[0] = (struct kwqe *) l4kwqe1;
1374         if (test_bit(SK_F_IPV6, &csk->flags)) {
1375                 wqes[1] = (struct kwqe *) l4kwqe2;
1376                 wqes[2] = (struct kwqe *) l4kwqe3;
1377                 num_wqes = 3;
1378
1379                 l4kwqe1->conn_flags = L4_KWQ_CONNECT_REQ1_IP_V6;
1380                 l4kwqe2->op_code = L4_KWQE_OPCODE_VALUE_CONNECT2;
1381                 l4kwqe2->flags =
1382                         L4_KWQ_CONNECT_REQ2_LINKED_WITH_NEXT |
1383                         L4_LAYER_CODE << L4_KWQ_CONNECT_REQ2_LAYER_CODE_SHIFT;
1384                 l4kwqe2->src_ip_v6_2 = be32_to_cpu(csk->src_ip[1]);
1385                 l4kwqe2->src_ip_v6_3 = be32_to_cpu(csk->src_ip[2]);
1386                 l4kwqe2->src_ip_v6_4 = be32_to_cpu(csk->src_ip[3]);
1387                 l4kwqe2->dst_ip_v6_2 = be32_to_cpu(csk->dst_ip[1]);
1388                 l4kwqe2->dst_ip_v6_3 = be32_to_cpu(csk->dst_ip[2]);
1389                 l4kwqe2->dst_ip_v6_4 = be32_to_cpu(csk->dst_ip[3]);
1390                 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct ipv6hdr) -
1391                                sizeof(struct tcphdr);
1392         } else {
1393                 wqes[1] = (struct kwqe *) l4kwqe3;
1394                 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct iphdr) -
1395                                sizeof(struct tcphdr);
1396         }
1397
1398         l4kwqe1->op_code = L4_KWQE_OPCODE_VALUE_CONNECT1;
1399         l4kwqe1->flags =
1400                 (L4_LAYER_CODE << L4_KWQ_CONNECT_REQ1_LAYER_CODE_SHIFT) |
1401                  L4_KWQ_CONNECT_REQ3_LINKED_WITH_NEXT;
1402         l4kwqe1->cid = csk->cid;
1403         l4kwqe1->pg_cid = csk->pg_cid;
1404         l4kwqe1->src_ip = be32_to_cpu(csk->src_ip[0]);
1405         l4kwqe1->dst_ip = be32_to_cpu(csk->dst_ip[0]);
1406         l4kwqe1->src_port = be16_to_cpu(csk->src_port);
1407         l4kwqe1->dst_port = be16_to_cpu(csk->dst_port);
1408         if (csk->tcp_flags & SK_TCP_NO_DELAY_ACK)
1409                 tcp_flags |= L4_KWQ_CONNECT_REQ1_NO_DELAY_ACK;
1410         if (csk->tcp_flags & SK_TCP_KEEP_ALIVE)
1411                 tcp_flags |= L4_KWQ_CONNECT_REQ1_KEEP_ALIVE;
1412         if (csk->tcp_flags & SK_TCP_NAGLE)
1413                 tcp_flags |= L4_KWQ_CONNECT_REQ1_NAGLE_ENABLE;
1414         if (csk->tcp_flags & SK_TCP_TIMESTAMP)
1415                 tcp_flags |= L4_KWQ_CONNECT_REQ1_TIME_STAMP;
1416         if (csk->tcp_flags & SK_TCP_SACK)
1417                 tcp_flags |= L4_KWQ_CONNECT_REQ1_SACK;
1418         if (csk->tcp_flags & SK_TCP_SEG_SCALING)
1419                 tcp_flags |= L4_KWQ_CONNECT_REQ1_SEG_SCALING;
1420
1421         l4kwqe1->tcp_flags = tcp_flags;
1422
1423         return dev->submit_kwqes(dev, wqes, num_wqes);
1424 }
1425
1426 static int cnic_cm_close_req(struct cnic_sock *csk)
1427 {
1428         struct cnic_dev *dev = csk->dev;
1429         struct l4_kwq_close_req *l4kwqe;
1430         struct kwqe *wqes[1];
1431
1432         l4kwqe = (struct l4_kwq_close_req *) &csk->kwqe2;
1433         memset(l4kwqe, 0, sizeof(*l4kwqe));
1434         wqes[0] = (struct kwqe *) l4kwqe;
1435
1436         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_CLOSE;
1437         l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_CLOSE_REQ_LAYER_CODE_SHIFT;
1438         l4kwqe->cid = csk->cid;
1439
1440         return dev->submit_kwqes(dev, wqes, 1);
1441 }
1442
1443 static int cnic_cm_abort_req(struct cnic_sock *csk)
1444 {
1445         struct cnic_dev *dev = csk->dev;
1446         struct l4_kwq_reset_req *l4kwqe;
1447         struct kwqe *wqes[1];
1448
1449         l4kwqe = (struct l4_kwq_reset_req *) &csk->kwqe2;
1450         memset(l4kwqe, 0, sizeof(*l4kwqe));
1451         wqes[0] = (struct kwqe *) l4kwqe;
1452
1453         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_RESET;
1454         l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_RESET_REQ_LAYER_CODE_SHIFT;
1455         l4kwqe->cid = csk->cid;
1456
1457         return dev->submit_kwqes(dev, wqes, 1);
1458 }
1459
1460 static int cnic_cm_create(struct cnic_dev *dev, int ulp_type, u32 cid,
1461                           u32 l5_cid, struct cnic_sock **csk, void *context)
1462 {
1463         struct cnic_local *cp = dev->cnic_priv;
1464         struct cnic_sock *csk1;
1465
1466         if (l5_cid >= MAX_CM_SK_TBL_SZ)
1467                 return -EINVAL;
1468
1469         csk1 = &cp->csk_tbl[l5_cid];
1470         if (atomic_read(&csk1->ref_count))
1471                 return -EAGAIN;
1472
1473         if (test_and_set_bit(SK_F_INUSE, &csk1->flags))
1474                 return -EBUSY;
1475
1476         csk1->dev = dev;
1477         csk1->cid = cid;
1478         csk1->l5_cid = l5_cid;
1479         csk1->ulp_type = ulp_type;
1480         csk1->context = context;
1481
1482         csk1->ka_timeout = DEF_KA_TIMEOUT;
1483         csk1->ka_interval = DEF_KA_INTERVAL;
1484         csk1->ka_max_probe_count = DEF_KA_MAX_PROBE_COUNT;
1485         csk1->tos = DEF_TOS;
1486         csk1->ttl = DEF_TTL;
1487         csk1->snd_seq_scale = DEF_SND_SEQ_SCALE;
1488         csk1->rcv_buf = DEF_RCV_BUF;
1489         csk1->snd_buf = DEF_SND_BUF;
1490         csk1->seed = DEF_SEED;
1491
1492         *csk = csk1;
1493         return 0;
1494 }
1495
1496 static void cnic_cm_cleanup(struct cnic_sock *csk)
1497 {
1498         if (csk->src_port) {
1499                 struct cnic_dev *dev = csk->dev;
1500                 struct cnic_local *cp = dev->cnic_priv;
1501
1502                 cnic_free_id(&cp->csk_port_tbl, csk->src_port);
1503                 csk->src_port = 0;
1504         }
1505 }
1506
1507 static void cnic_close_conn(struct cnic_sock *csk)
1508 {
1509         if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags)) {
1510                 cnic_cm_upload_pg(csk);
1511                 clear_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1512         }
1513         cnic_cm_cleanup(csk);
1514 }
1515
1516 static int cnic_cm_destroy(struct cnic_sock *csk)
1517 {
1518         if (!cnic_in_use(csk))
1519                 return -EINVAL;
1520
1521         csk_hold(csk);
1522         clear_bit(SK_F_INUSE, &csk->flags);
1523         smp_mb__after_clear_bit();
1524         while (atomic_read(&csk->ref_count) != 1)
1525                 msleep(1);
1526         cnic_cm_cleanup(csk);
1527
1528         csk->flags = 0;
1529         csk_put(csk);
1530         return 0;
1531 }
1532
1533 static inline u16 cnic_get_vlan(struct net_device *dev,
1534                                 struct net_device **vlan_dev)
1535 {
1536         if (dev->priv_flags & IFF_802_1Q_VLAN) {
1537                 *vlan_dev = vlan_dev_real_dev(dev);
1538                 return vlan_dev_vlan_id(dev);
1539         }
1540         *vlan_dev = dev;
1541         return 0;
1542 }
1543
1544 static int cnic_get_v4_route(struct sockaddr_in *dst_addr,
1545                              struct dst_entry **dst)
1546 {
1547 #if defined(CONFIG_INET)
1548         struct flowi fl;
1549         int err;
1550         struct rtable *rt;
1551
1552         memset(&fl, 0, sizeof(fl));
1553         fl.nl_u.ip4_u.daddr = dst_addr->sin_addr.s_addr;
1554
1555         err = ip_route_output_key(&init_net, &rt, &fl);
1556         if (!err)
1557                 *dst = &rt->u.dst;
1558         return err;
1559 #else
1560         return -ENETUNREACH;
1561 #endif
1562 }
1563
1564 static int cnic_get_v6_route(struct sockaddr_in6 *dst_addr,
1565                              struct dst_entry **dst)
1566 {
1567 #if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
1568         struct flowi fl;
1569
1570         memset(&fl, 0, sizeof(fl));
1571         ipv6_addr_copy(&fl.fl6_dst, &dst_addr->sin6_addr);
1572         if (ipv6_addr_type(&fl.fl6_dst) & IPV6_ADDR_LINKLOCAL)
1573                 fl.oif = dst_addr->sin6_scope_id;
1574
1575         *dst = ip6_route_output(&init_net, NULL, &fl);
1576         if (*dst)
1577                 return 0;
1578 #endif
1579
1580         return -ENETUNREACH;
1581 }
1582
1583 static struct cnic_dev *cnic_cm_select_dev(struct sockaddr_in *dst_addr,
1584                                            int ulp_type)
1585 {
1586         struct cnic_dev *dev = NULL;
1587         struct dst_entry *dst;
1588         struct net_device *netdev = NULL;
1589         int err = -ENETUNREACH;
1590
1591         if (dst_addr->sin_family == AF_INET)
1592                 err = cnic_get_v4_route(dst_addr, &dst);
1593         else if (dst_addr->sin_family == AF_INET6) {
1594                 struct sockaddr_in6 *dst_addr6 =
1595                         (struct sockaddr_in6 *) dst_addr;
1596
1597                 err = cnic_get_v6_route(dst_addr6, &dst);
1598         } else
1599                 return NULL;
1600
1601         if (err)
1602                 return NULL;
1603
1604         if (!dst->dev)
1605                 goto done;
1606
1607         cnic_get_vlan(dst->dev, &netdev);
1608
1609         dev = cnic_from_netdev(netdev);
1610
1611 done:
1612         dst_release(dst);
1613         if (dev)
1614                 cnic_put(dev);
1615         return dev;
1616 }
1617
1618 static int cnic_resolve_addr(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1619 {
1620         struct cnic_dev *dev = csk->dev;
1621         struct cnic_local *cp = dev->cnic_priv;
1622
1623         return cnic_send_nlmsg(cp, ISCSI_KEVENT_PATH_REQ, csk);
1624 }
1625
1626 static int cnic_get_route(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1627 {
1628         struct cnic_dev *dev = csk->dev;
1629         struct cnic_local *cp = dev->cnic_priv;
1630         int is_v6, err, rc = -ENETUNREACH;
1631         struct dst_entry *dst;
1632         struct net_device *realdev;
1633         u32 local_port;
1634
1635         if (saddr->local.v6.sin6_family == AF_INET6 &&
1636             saddr->remote.v6.sin6_family == AF_INET6)
1637                 is_v6 = 1;
1638         else if (saddr->local.v4.sin_family == AF_INET &&
1639                  saddr->remote.v4.sin_family == AF_INET)
1640                 is_v6 = 0;
1641         else
1642                 return -EINVAL;
1643
1644         clear_bit(SK_F_IPV6, &csk->flags);
1645
1646         if (is_v6) {
1647 #if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
1648                 set_bit(SK_F_IPV6, &csk->flags);
1649                 err = cnic_get_v6_route(&saddr->remote.v6, &dst);
1650                 if (err)
1651                         return err;
1652
1653                 if (!dst || dst->error || !dst->dev)
1654                         goto err_out;
1655
1656                 memcpy(&csk->dst_ip[0], &saddr->remote.v6.sin6_addr,
1657                        sizeof(struct in6_addr));
1658                 csk->dst_port = saddr->remote.v6.sin6_port;
1659                 local_port = saddr->local.v6.sin6_port;
1660 #else
1661                 return rc;
1662 #endif
1663
1664         } else {
1665                 err = cnic_get_v4_route(&saddr->remote.v4, &dst);
1666                 if (err)
1667                         return err;
1668
1669                 if (!dst || dst->error || !dst->dev)
1670                         goto err_out;
1671
1672                 csk->dst_ip[0] = saddr->remote.v4.sin_addr.s_addr;
1673                 csk->dst_port = saddr->remote.v4.sin_port;
1674                 local_port = saddr->local.v4.sin_port;
1675         }
1676
1677         csk->vlan_id = cnic_get_vlan(dst->dev, &realdev);
1678         if (realdev != dev->netdev)
1679                 goto err_out;
1680
1681         if (local_port >= CNIC_LOCAL_PORT_MIN &&
1682             local_port < CNIC_LOCAL_PORT_MAX) {
1683                 if (cnic_alloc_id(&cp->csk_port_tbl, local_port))
1684                         local_port = 0;
1685         } else
1686                 local_port = 0;
1687
1688         if (!local_port) {
1689                 local_port = cnic_alloc_new_id(&cp->csk_port_tbl);
1690                 if (local_port == -1) {
1691                         rc = -ENOMEM;
1692                         goto err_out;
1693                 }
1694         }
1695         csk->src_port = local_port;
1696
1697         csk->mtu = dst_mtu(dst);
1698         rc = 0;
1699
1700 err_out:
1701         dst_release(dst);
1702         return rc;
1703 }
1704
1705 static void cnic_init_csk_state(struct cnic_sock *csk)
1706 {
1707         csk->state = 0;
1708         clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1709         clear_bit(SK_F_CLOSING, &csk->flags);
1710 }
1711
1712 static int cnic_cm_connect(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1713 {
1714         int err = 0;
1715
1716         if (!cnic_in_use(csk))
1717                 return -EINVAL;
1718
1719         if (test_and_set_bit(SK_F_CONNECT_START, &csk->flags))
1720                 return -EINVAL;
1721
1722         cnic_init_csk_state(csk);
1723
1724         err = cnic_get_route(csk, saddr);
1725         if (err)
1726                 goto err_out;
1727
1728         err = cnic_resolve_addr(csk, saddr);
1729         if (!err)
1730                 return 0;
1731
1732 err_out:
1733         clear_bit(SK_F_CONNECT_START, &csk->flags);
1734         return err;
1735 }
1736
1737 static int cnic_cm_abort(struct cnic_sock *csk)
1738 {
1739         struct cnic_local *cp = csk->dev->cnic_priv;
1740         u32 opcode;
1741
1742         if (!cnic_in_use(csk))
1743                 return -EINVAL;
1744
1745         if (cnic_abort_prep(csk))
1746                 return cnic_cm_abort_req(csk);
1747
1748         /* Getting here means that we haven't started connect, or
1749          * connect was not successful.
1750          */
1751
1752         csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
1753         if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1754                 opcode = csk->state;
1755         else
1756                 opcode = L5CM_RAMROD_CMD_ID_TERMINATE_OFFLOAD;
1757         cp->close_conn(csk, opcode);
1758
1759         return 0;
1760 }
1761
1762 static int cnic_cm_close(struct cnic_sock *csk)
1763 {
1764         if (!cnic_in_use(csk))
1765                 return -EINVAL;
1766
1767         if (cnic_close_prep(csk)) {
1768                 csk->state = L4_KCQE_OPCODE_VALUE_CLOSE_COMP;
1769                 return cnic_cm_close_req(csk);
1770         }
1771         return 0;
1772 }
1773
1774 static void cnic_cm_upcall(struct cnic_local *cp, struct cnic_sock *csk,
1775                            u8 opcode)
1776 {
1777         struct cnic_ulp_ops *ulp_ops;
1778         int ulp_type = csk->ulp_type;
1779
1780         rcu_read_lock();
1781         ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
1782         if (ulp_ops) {
1783                 if (opcode == L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE)
1784                         ulp_ops->cm_connect_complete(csk);
1785                 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)
1786                         ulp_ops->cm_close_complete(csk);
1787                 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED)
1788                         ulp_ops->cm_remote_abort(csk);
1789                 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_COMP)
1790                         ulp_ops->cm_abort_complete(csk);
1791                 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED)
1792                         ulp_ops->cm_remote_close(csk);
1793         }
1794         rcu_read_unlock();
1795 }
1796
1797 static int cnic_cm_set_pg(struct cnic_sock *csk)
1798 {
1799         if (cnic_offld_prep(csk)) {
1800                 if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1801                         cnic_cm_update_pg(csk);
1802                 else
1803                         cnic_cm_offload_pg(csk);
1804         }
1805         return 0;
1806 }
1807
1808 static void cnic_cm_process_offld_pg(struct cnic_dev *dev, struct l4_kcq *kcqe)
1809 {
1810         struct cnic_local *cp = dev->cnic_priv;
1811         u32 l5_cid = kcqe->pg_host_opaque;
1812         u8 opcode = kcqe->op_code;
1813         struct cnic_sock *csk = &cp->csk_tbl[l5_cid];
1814
1815         csk_hold(csk);
1816         if (!cnic_in_use(csk))
1817                 goto done;
1818
1819         if (opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1820                 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1821                 goto done;
1822         }
1823         csk->pg_cid = kcqe->pg_cid;
1824         set_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1825         cnic_cm_conn_req(csk);
1826
1827 done:
1828         csk_put(csk);
1829 }
1830
1831 static void cnic_cm_process_kcqe(struct cnic_dev *dev, struct kcqe *kcqe)
1832 {
1833         struct cnic_local *cp = dev->cnic_priv;
1834         struct l4_kcq *l4kcqe = (struct l4_kcq *) kcqe;
1835         u8 opcode = l4kcqe->op_code;
1836         u32 l5_cid;
1837         struct cnic_sock *csk;
1838
1839         if (opcode == L4_KCQE_OPCODE_VALUE_OFFLOAD_PG ||
1840             opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1841                 cnic_cm_process_offld_pg(dev, l4kcqe);
1842                 return;
1843         }
1844
1845         l5_cid = l4kcqe->conn_id;
1846         if (opcode & 0x80)
1847                 l5_cid = l4kcqe->cid;
1848         if (l5_cid >= MAX_CM_SK_TBL_SZ)
1849                 return;
1850
1851         csk = &cp->csk_tbl[l5_cid];
1852         csk_hold(csk);
1853
1854         if (!cnic_in_use(csk)) {
1855                 csk_put(csk);
1856                 return;
1857         }
1858
1859         switch (opcode) {
1860         case L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE:
1861                 if (l4kcqe->status == 0)
1862                         set_bit(SK_F_OFFLD_COMPLETE, &csk->flags);
1863
1864                 smp_mb__before_clear_bit();
1865                 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1866                 cnic_cm_upcall(cp, csk, opcode);
1867                 break;
1868
1869         case L4_KCQE_OPCODE_VALUE_RESET_RECEIVED:
1870                 if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags))
1871                         csk->state = opcode;
1872                 /* fall through */
1873         case L4_KCQE_OPCODE_VALUE_CLOSE_COMP:
1874         case L4_KCQE_OPCODE_VALUE_RESET_COMP:
1875                 cp->close_conn(csk, opcode);
1876                 break;
1877
1878         case L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED:
1879                 cnic_cm_upcall(cp, csk, opcode);
1880                 break;
1881         }
1882         csk_put(csk);
1883 }
1884
1885 static void cnic_cm_indicate_kcqe(void *data, struct kcqe *kcqe[], u32 num)
1886 {
1887         struct cnic_dev *dev = data;
1888         int i;
1889
1890         for (i = 0; i < num; i++)
1891                 cnic_cm_process_kcqe(dev, kcqe[i]);
1892 }
1893
1894 static struct cnic_ulp_ops cm_ulp_ops = {
1895         .indicate_kcqes         = cnic_cm_indicate_kcqe,
1896 };
1897
1898 static void cnic_cm_free_mem(struct cnic_dev *dev)
1899 {
1900         struct cnic_local *cp = dev->cnic_priv;
1901
1902         kfree(cp->csk_tbl);
1903         cp->csk_tbl = NULL;
1904         cnic_free_id_tbl(&cp->csk_port_tbl);
1905 }
1906
1907 static int cnic_cm_alloc_mem(struct cnic_dev *dev)
1908 {
1909         struct cnic_local *cp = dev->cnic_priv;
1910
1911         cp->csk_tbl = kzalloc(sizeof(struct cnic_sock) * MAX_CM_SK_TBL_SZ,
1912                               GFP_KERNEL);
1913         if (!cp->csk_tbl)
1914                 return -ENOMEM;
1915
1916         if (cnic_init_id_tbl(&cp->csk_port_tbl, CNIC_LOCAL_PORT_RANGE,
1917                              CNIC_LOCAL_PORT_MIN)) {
1918                 cnic_cm_free_mem(dev);
1919                 return -ENOMEM;
1920         }
1921         return 0;
1922 }
1923
1924 static int cnic_ready_to_close(struct cnic_sock *csk, u32 opcode)
1925 {
1926         if ((opcode == csk->state) ||
1927             (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED &&
1928              csk->state == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)) {
1929                 if (!test_and_set_bit(SK_F_CLOSING, &csk->flags))
1930                         return 1;
1931         }
1932         return 0;
1933 }
1934
1935 static void cnic_close_bnx2_conn(struct cnic_sock *csk, u32 opcode)
1936 {
1937         struct cnic_dev *dev = csk->dev;
1938         struct cnic_local *cp = dev->cnic_priv;
1939
1940         clear_bit(SK_F_CONNECT_START, &csk->flags);
1941         if (cnic_ready_to_close(csk, opcode)) {
1942                 cnic_close_conn(csk);
1943                 cnic_cm_upcall(cp, csk, opcode);
1944         }
1945 }
1946
1947 static void cnic_cm_stop_bnx2_hw(struct cnic_dev *dev)
1948 {
1949 }
1950
1951 static int cnic_cm_init_bnx2_hw(struct cnic_dev *dev)
1952 {
1953         u32 seed;
1954
1955         get_random_bytes(&seed, 4);
1956         cnic_ctx_wr(dev, 45, 0, seed);
1957         return 0;
1958 }
1959
1960 static int cnic_cm_open(struct cnic_dev *dev)
1961 {
1962         struct cnic_local *cp = dev->cnic_priv;
1963         int err;
1964
1965         err = cnic_cm_alloc_mem(dev);
1966         if (err)
1967                 return err;
1968
1969         err = cp->start_cm(dev);
1970
1971         if (err)
1972                 goto err_out;
1973
1974         dev->cm_create = cnic_cm_create;
1975         dev->cm_destroy = cnic_cm_destroy;
1976         dev->cm_connect = cnic_cm_connect;
1977         dev->cm_abort = cnic_cm_abort;
1978         dev->cm_close = cnic_cm_close;
1979         dev->cm_select_dev = cnic_cm_select_dev;
1980
1981         cp->ulp_handle[CNIC_ULP_L4] = dev;
1982         rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], &cm_ulp_ops);
1983         return 0;
1984
1985 err_out:
1986         cnic_cm_free_mem(dev);
1987         return err;
1988 }
1989
1990 static int cnic_cm_shutdown(struct cnic_dev *dev)
1991 {
1992         struct cnic_local *cp = dev->cnic_priv;
1993         int i;
1994
1995         cp->stop_cm(dev);
1996
1997         if (!cp->csk_tbl)
1998                 return 0;
1999
2000         for (i = 0; i < MAX_CM_SK_TBL_SZ; i++) {
2001                 struct cnic_sock *csk = &cp->csk_tbl[i];
2002
2003                 clear_bit(SK_F_INUSE, &csk->flags);
2004                 cnic_cm_cleanup(csk);
2005         }
2006         cnic_cm_free_mem(dev);
2007
2008         return 0;
2009 }
2010
2011 static void cnic_init_context(struct cnic_dev *dev, u32 cid)
2012 {
2013         struct cnic_local *cp = dev->cnic_priv;
2014         u32 cid_addr;
2015         int i;
2016
2017         if (CHIP_NUM(cp) == CHIP_NUM_5709)
2018                 return;
2019
2020         cid_addr = GET_CID_ADDR(cid);
2021
2022         for (i = 0; i < CTX_SIZE; i += 4)
2023                 cnic_ctx_wr(dev, cid_addr, i, 0);
2024 }
2025
2026 static int cnic_setup_5709_context(struct cnic_dev *dev, int valid)
2027 {
2028         struct cnic_local *cp = dev->cnic_priv;
2029         int ret = 0, i;
2030         u32 valid_bit = valid ? BNX2_CTX_HOST_PAGE_TBL_DATA0_VALID : 0;
2031
2032         if (CHIP_NUM(cp) != CHIP_NUM_5709)
2033                 return 0;
2034
2035         for (i = 0; i < cp->ctx_blks; i++) {
2036                 int j;
2037                 u32 idx = cp->ctx_arr[i].cid / cp->cids_per_blk;
2038                 u32 val;
2039
2040                 memset(cp->ctx_arr[i].ctx, 0, BCM_PAGE_SIZE);
2041
2042                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA0,
2043                         (cp->ctx_arr[i].mapping & 0xffffffff) | valid_bit);
2044                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA1,
2045                         (u64) cp->ctx_arr[i].mapping >> 32);
2046                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL, idx |
2047                         BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ);
2048                 for (j = 0; j < 10; j++) {
2049
2050                         val = CNIC_RD(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL);
2051                         if (!(val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ))
2052                                 break;
2053                         udelay(5);
2054                 }
2055                 if (val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ) {
2056                         ret = -EBUSY;
2057                         break;
2058                 }
2059         }
2060         return ret;
2061 }
2062
2063 static void cnic_free_irq(struct cnic_dev *dev)
2064 {
2065         struct cnic_local *cp = dev->cnic_priv;
2066         struct cnic_eth_dev *ethdev = cp->ethdev;
2067
2068         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2069                 cp->disable_int_sync(dev);
2070                 tasklet_disable(&cp->cnic_irq_task);
2071                 free_irq(ethdev->irq_arr[0].vector, dev);
2072         }
2073 }
2074
2075 static int cnic_init_bnx2_irq(struct cnic_dev *dev)
2076 {
2077         struct cnic_local *cp = dev->cnic_priv;
2078         struct cnic_eth_dev *ethdev = cp->ethdev;
2079
2080         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2081                 int err, i = 0;
2082                 int sblk_num = cp->status_blk_num;
2083                 u32 base = ((sblk_num - 1) * BNX2_HC_SB_CONFIG_SIZE) +
2084                            BNX2_HC_SB_CONFIG_1;
2085
2086                 CNIC_WR(dev, base, BNX2_HC_SB_CONFIG_1_ONE_SHOT);
2087
2088                 CNIC_WR(dev, base + BNX2_HC_COMP_PROD_TRIP_OFF, (2 << 16) | 8);
2089                 CNIC_WR(dev, base + BNX2_HC_COM_TICKS_OFF, (64 << 16) | 220);
2090                 CNIC_WR(dev, base + BNX2_HC_CMD_TICKS_OFF, (64 << 16) | 220);
2091
2092                 cp->bnx2_status_blk = cp->status_blk;
2093                 cp->last_status_idx = cp->bnx2_status_blk->status_idx;
2094                 tasklet_init(&cp->cnic_irq_task, &cnic_service_bnx2_msix,
2095                              (unsigned long) dev);
2096                 err = request_irq(ethdev->irq_arr[0].vector, cnic_irq, 0,
2097                                   "cnic", dev);
2098                 if (err) {
2099                         tasklet_disable(&cp->cnic_irq_task);
2100                         return err;
2101                 }
2102                 while (cp->bnx2_status_blk->status_completion_producer_index &&
2103                        i < 10) {
2104                         CNIC_WR(dev, BNX2_HC_COALESCE_NOW,
2105                                 1 << (11 + sblk_num));
2106                         udelay(10);
2107                         i++;
2108                         barrier();
2109                 }
2110                 if (cp->bnx2_status_blk->status_completion_producer_index) {
2111                         cnic_free_irq(dev);
2112                         goto failed;
2113                 }
2114
2115         } else {
2116                 struct status_block *sblk = cp->status_blk;
2117                 u32 hc_cmd = CNIC_RD(dev, BNX2_HC_COMMAND);
2118                 int i = 0;
2119
2120                 while (sblk->status_completion_producer_index && i < 10) {
2121                         CNIC_WR(dev, BNX2_HC_COMMAND,
2122                                 hc_cmd | BNX2_HC_COMMAND_COAL_NOW_WO_INT);
2123                         udelay(10);
2124                         i++;
2125                         barrier();
2126                 }
2127                 if (sblk->status_completion_producer_index)
2128                         goto failed;
2129
2130         }
2131         return 0;
2132
2133 failed:
2134         printk(KERN_ERR PFX "%s: " "KCQ index not resetting to 0.\n",
2135                dev->netdev->name);
2136         return -EBUSY;
2137 }
2138
2139 static void cnic_enable_bnx2_int(struct cnic_dev *dev)
2140 {
2141         struct cnic_local *cp = dev->cnic_priv;
2142         struct cnic_eth_dev *ethdev = cp->ethdev;
2143
2144         if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
2145                 return;
2146
2147         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2148                 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
2149 }
2150
2151 static void cnic_disable_bnx2_int_sync(struct cnic_dev *dev)
2152 {
2153         struct cnic_local *cp = dev->cnic_priv;
2154         struct cnic_eth_dev *ethdev = cp->ethdev;
2155
2156         if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
2157                 return;
2158
2159         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2160                 BNX2_PCICFG_INT_ACK_CMD_MASK_INT);
2161         CNIC_RD(dev, BNX2_PCICFG_INT_ACK_CMD);
2162         synchronize_irq(ethdev->irq_arr[0].vector);
2163 }
2164
2165 static void cnic_init_bnx2_tx_ring(struct cnic_dev *dev)
2166 {
2167         struct cnic_local *cp = dev->cnic_priv;
2168         struct cnic_eth_dev *ethdev = cp->ethdev;
2169         u32 cid_addr, tx_cid, sb_id;
2170         u32 val, offset0, offset1, offset2, offset3;
2171         int i;
2172         struct tx_bd *txbd;
2173         dma_addr_t buf_map;
2174         struct status_block *s_blk = cp->status_blk;
2175
2176         sb_id = cp->status_blk_num;
2177         tx_cid = 20;
2178         cnic_init_context(dev, tx_cid);
2179         cnic_init_context(dev, tx_cid + 1);
2180         cp->tx_cons_ptr = &s_blk->status_tx_quick_consumer_index2;
2181         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2182                 struct status_block_msix *sblk = cp->status_blk;
2183
2184                 tx_cid = TX_TSS_CID + sb_id - 1;
2185                 cnic_init_context(dev, tx_cid);
2186                 CNIC_WR(dev, BNX2_TSCH_TSS_CFG, (sb_id << 24) |
2187                         (TX_TSS_CID << 7));
2188                 cp->tx_cons_ptr = &sblk->status_tx_quick_consumer_index;
2189         }
2190         cp->tx_cons = *cp->tx_cons_ptr;
2191
2192         cid_addr = GET_CID_ADDR(tx_cid);
2193         if (CHIP_NUM(cp) == CHIP_NUM_5709) {
2194                 u32 cid_addr2 = GET_CID_ADDR(tx_cid + 4) + 0x40;
2195
2196                 for (i = 0; i < PHY_CTX_SIZE; i += 4)
2197                         cnic_ctx_wr(dev, cid_addr2, i, 0);
2198
2199                 offset0 = BNX2_L2CTX_TYPE_XI;
2200                 offset1 = BNX2_L2CTX_CMD_TYPE_XI;
2201                 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI_XI;
2202                 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO_XI;
2203         } else {
2204                 offset0 = BNX2_L2CTX_TYPE;
2205                 offset1 = BNX2_L2CTX_CMD_TYPE;
2206                 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI;
2207                 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO;
2208         }
2209         val = BNX2_L2CTX_TYPE_TYPE_L2 | BNX2_L2CTX_TYPE_SIZE_L2;
2210         cnic_ctx_wr(dev, cid_addr, offset0, val);
2211
2212         val = BNX2_L2CTX_CMD_TYPE_TYPE_L2 | (8 << 16);
2213         cnic_ctx_wr(dev, cid_addr, offset1, val);
2214
2215         txbd = (struct tx_bd *) cp->l2_ring;
2216
2217         buf_map = cp->l2_buf_map;
2218         for (i = 0; i < MAX_TX_DESC_CNT; i++, txbd++) {
2219                 txbd->tx_bd_haddr_hi = (u64) buf_map >> 32;
2220                 txbd->tx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2221         }
2222         val = (u64) cp->l2_ring_map >> 32;
2223         cnic_ctx_wr(dev, cid_addr, offset2, val);
2224         txbd->tx_bd_haddr_hi = val;
2225
2226         val = (u64) cp->l2_ring_map & 0xffffffff;
2227         cnic_ctx_wr(dev, cid_addr, offset3, val);
2228         txbd->tx_bd_haddr_lo = val;
2229 }
2230
2231 static void cnic_init_bnx2_rx_ring(struct cnic_dev *dev)
2232 {
2233         struct cnic_local *cp = dev->cnic_priv;
2234         struct cnic_eth_dev *ethdev = cp->ethdev;
2235         u32 cid_addr, sb_id, val, coal_reg, coal_val;
2236         int i;
2237         struct rx_bd *rxbd;
2238         struct status_block *s_blk = cp->status_blk;
2239
2240         sb_id = cp->status_blk_num;
2241         cnic_init_context(dev, 2);
2242         cp->rx_cons_ptr = &s_blk->status_rx_quick_consumer_index2;
2243         coal_reg = BNX2_HC_COMMAND;
2244         coal_val = CNIC_RD(dev, coal_reg);
2245         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2246                 struct status_block_msix *sblk = cp->status_blk;
2247
2248                 cp->rx_cons_ptr = &sblk->status_rx_quick_consumer_index;
2249                 coal_reg = BNX2_HC_COALESCE_NOW;
2250                 coal_val = 1 << (11 + sb_id);
2251         }
2252         i = 0;
2253         while (!(*cp->rx_cons_ptr != 0) && i < 10) {
2254                 CNIC_WR(dev, coal_reg, coal_val);
2255                 udelay(10);
2256                 i++;
2257                 barrier();
2258         }
2259         cp->rx_cons = *cp->rx_cons_ptr;
2260
2261         cid_addr = GET_CID_ADDR(2);
2262         val = BNX2_L2CTX_CTX_TYPE_CTX_BD_CHN_TYPE_VALUE |
2263               BNX2_L2CTX_CTX_TYPE_SIZE_L2 | (0x02 << 8);
2264         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_CTX_TYPE, val);
2265
2266         if (sb_id == 0)
2267                 val = 2 << BNX2_L2CTX_STATUSB_NUM_SHIFT;
2268         else
2269                 val = BNX2_L2CTX_STATUSB_NUM(sb_id);
2270         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_HOST_BDIDX, val);
2271
2272         rxbd = (struct rx_bd *) (cp->l2_ring + BCM_PAGE_SIZE);
2273         for (i = 0; i < MAX_RX_DESC_CNT; i++, rxbd++) {
2274                 dma_addr_t buf_map;
2275                 int n = (i % cp->l2_rx_ring_size) + 1;
2276
2277                 buf_map = cp->l2_buf_map + (n * cp->l2_single_buf_size);
2278                 rxbd->rx_bd_len = cp->l2_single_buf_size;
2279                 rxbd->rx_bd_flags = RX_BD_FLAGS_START | RX_BD_FLAGS_END;
2280                 rxbd->rx_bd_haddr_hi = (u64) buf_map >> 32;
2281                 rxbd->rx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2282         }
2283         val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) >> 32;
2284         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_HI, val);
2285         rxbd->rx_bd_haddr_hi = val;
2286
2287         val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) & 0xffffffff;
2288         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_LO, val);
2289         rxbd->rx_bd_haddr_lo = val;
2290
2291         val = cnic_reg_rd_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD);
2292         cnic_reg_wr_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD, val | (1 << 2));
2293 }
2294
2295 static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *dev)
2296 {
2297         struct kwqe *wqes[1], l2kwqe;
2298
2299         memset(&l2kwqe, 0, sizeof(l2kwqe));
2300         wqes[0] = &l2kwqe;
2301         l2kwqe.kwqe_op_flag = (L2_LAYER_CODE << KWQE_FLAGS_LAYER_SHIFT) |
2302                               (L2_KWQE_OPCODE_VALUE_FLUSH <<
2303                                KWQE_OPCODE_SHIFT) | 2;
2304         dev->submit_kwqes(dev, wqes, 1);
2305 }
2306
2307 static void cnic_set_bnx2_mac(struct cnic_dev *dev)
2308 {
2309         struct cnic_local *cp = dev->cnic_priv;
2310         u32 val;
2311
2312         val = cp->func << 2;
2313
2314         cp->shmem_base = cnic_reg_rd_ind(dev, BNX2_SHM_HDR_ADDR_0 + val);
2315
2316         val = cnic_reg_rd_ind(dev, cp->shmem_base +
2317                               BNX2_PORT_HW_CFG_ISCSI_MAC_UPPER);
2318         dev->mac_addr[0] = (u8) (val >> 8);
2319         dev->mac_addr[1] = (u8) val;
2320
2321         CNIC_WR(dev, BNX2_EMAC_MAC_MATCH4, val);
2322
2323         val = cnic_reg_rd_ind(dev, cp->shmem_base +
2324                               BNX2_PORT_HW_CFG_ISCSI_MAC_LOWER);
2325         dev->mac_addr[2] = (u8) (val >> 24);
2326         dev->mac_addr[3] = (u8) (val >> 16);
2327         dev->mac_addr[4] = (u8) (val >> 8);
2328         dev->mac_addr[5] = (u8) val;
2329
2330         CNIC_WR(dev, BNX2_EMAC_MAC_MATCH5, val);
2331
2332         val = 4 | BNX2_RPM_SORT_USER2_BC_EN;
2333         if (CHIP_NUM(cp) != CHIP_NUM_5709)
2334                 val |= BNX2_RPM_SORT_USER2_PROM_VLAN;
2335
2336         CNIC_WR(dev, BNX2_RPM_SORT_USER2, 0x0);
2337         CNIC_WR(dev, BNX2_RPM_SORT_USER2, val);
2338         CNIC_WR(dev, BNX2_RPM_SORT_USER2, val | BNX2_RPM_SORT_USER2_ENA);
2339 }
2340
2341 static int cnic_start_bnx2_hw(struct cnic_dev *dev)
2342 {
2343         struct cnic_local *cp = dev->cnic_priv;
2344         struct cnic_eth_dev *ethdev = cp->ethdev;
2345         struct status_block *sblk = cp->status_blk;
2346         u32 val;
2347         int err;
2348
2349         cnic_set_bnx2_mac(dev);
2350
2351         val = CNIC_RD(dev, BNX2_MQ_CONFIG);
2352         val &= ~BNX2_MQ_CONFIG_KNL_BYP_BLK_SIZE;
2353         if (BCM_PAGE_BITS > 12)
2354                 val |= (12 - 8)  << 4;
2355         else
2356                 val |= (BCM_PAGE_BITS - 8)  << 4;
2357
2358         CNIC_WR(dev, BNX2_MQ_CONFIG, val);
2359
2360         CNIC_WR(dev, BNX2_HC_COMP_PROD_TRIP, (2 << 16) | 8);
2361         CNIC_WR(dev, BNX2_HC_COM_TICKS, (64 << 16) | 220);
2362         CNIC_WR(dev, BNX2_HC_CMD_TICKS, (64 << 16) | 220);
2363
2364         err = cnic_setup_5709_context(dev, 1);
2365         if (err)
2366                 return err;
2367
2368         cnic_init_context(dev, KWQ_CID);
2369         cnic_init_context(dev, KCQ_CID);
2370
2371         cp->kwq_cid_addr = GET_CID_ADDR(KWQ_CID);
2372         cp->kwq_io_addr = MB_GET_CID_ADDR(KWQ_CID) + L5_KRNLQ_HOST_QIDX;
2373
2374         cp->max_kwq_idx = MAX_KWQ_IDX;
2375         cp->kwq_prod_idx = 0;
2376         cp->kwq_con_idx = 0;
2377         cp->cnic_local_flags |= CNIC_LCL_FL_KWQ_INIT;
2378
2379         if (CHIP_NUM(cp) == CHIP_NUM_5706 || CHIP_NUM(cp) == CHIP_NUM_5708)
2380                 cp->kwq_con_idx_ptr = &sblk->status_rx_quick_consumer_index15;
2381         else
2382                 cp->kwq_con_idx_ptr = &sblk->status_cmd_consumer_index;
2383
2384         /* Initialize the kernel work queue context. */
2385         val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2386               (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2387         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_TYPE, val);
2388
2389         val = (BCM_PAGE_SIZE / sizeof(struct kwqe) - 1) << 16;
2390         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2391
2392         val = ((BCM_PAGE_SIZE / sizeof(struct kwqe)) << 16) | KWQ_PAGE_CNT;
2393         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2394
2395         val = (u32) ((u64) cp->kwq_info.pgtbl_map >> 32);
2396         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2397
2398         val = (u32) cp->kwq_info.pgtbl_map;
2399         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2400
2401         cp->kcq_cid_addr = GET_CID_ADDR(KCQ_CID);
2402         cp->kcq_io_addr = MB_GET_CID_ADDR(KCQ_CID) + L5_KRNLQ_HOST_QIDX;
2403
2404         cp->kcq_prod_idx = 0;
2405
2406         /* Initialize the kernel complete queue context. */
2407         val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2408               (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2409         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_TYPE, val);
2410
2411         val = (BCM_PAGE_SIZE / sizeof(struct kcqe) - 1) << 16;
2412         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2413
2414         val = ((BCM_PAGE_SIZE / sizeof(struct kcqe)) << 16) | KCQ_PAGE_CNT;
2415         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2416
2417         val = (u32) ((u64) cp->kcq_info.pgtbl_map >> 32);
2418         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2419
2420         val = (u32) cp->kcq_info.pgtbl_map;
2421         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2422
2423         cp->int_num = 0;
2424         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2425                 u32 sb_id = cp->status_blk_num;
2426                 u32 sb = BNX2_L2CTX_STATUSB_NUM(sb_id);
2427
2428                 cp->int_num = sb_id << BNX2_PCICFG_INT_ACK_CMD_INT_NUM_SHIFT;
2429                 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2430                 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2431         }
2432
2433         /* Enable Commnad Scheduler notification when we write to the
2434          * host producer index of the kernel contexts. */
2435         CNIC_WR(dev, BNX2_MQ_KNL_CMD_MASK1, 2);
2436
2437         /* Enable Command Scheduler notification when we write to either
2438          * the Send Queue or Receive Queue producer indexes of the kernel
2439          * bypass contexts. */
2440         CNIC_WR(dev, BNX2_MQ_KNL_BYP_CMD_MASK1, 7);
2441         CNIC_WR(dev, BNX2_MQ_KNL_BYP_WRITE_MASK1, 7);
2442
2443         /* Notify COM when the driver post an application buffer. */
2444         CNIC_WR(dev, BNX2_MQ_KNL_RX_V2P_MASK2, 0x2000);
2445
2446         /* Set the CP and COM doorbells.  These two processors polls the
2447          * doorbell for a non zero value before running.  This must be done
2448          * after setting up the kernel queue contexts. */
2449         cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 1);
2450         cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 1);
2451
2452         cnic_init_bnx2_tx_ring(dev);
2453         cnic_init_bnx2_rx_ring(dev);
2454
2455         err = cnic_init_bnx2_irq(dev);
2456         if (err) {
2457                 printk(KERN_ERR PFX "%s: cnic_init_irq failed\n",
2458                        dev->netdev->name);
2459                 cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2460                 cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2461                 return err;
2462         }
2463
2464         return 0;
2465 }
2466
2467 static int cnic_register_netdev(struct cnic_dev *dev)
2468 {
2469         struct cnic_local *cp = dev->cnic_priv;
2470         struct cnic_eth_dev *ethdev = cp->ethdev;
2471         int err;
2472
2473         if (!ethdev)
2474                 return -ENODEV;
2475
2476         if (ethdev->drv_state & CNIC_DRV_STATE_REGD)
2477                 return 0;
2478
2479         err = ethdev->drv_register_cnic(dev->netdev, cp->cnic_ops, dev);
2480         if (err)
2481                 printk(KERN_ERR PFX "%s: register_cnic failed\n",
2482                        dev->netdev->name);
2483
2484         return err;
2485 }
2486
2487 static void cnic_unregister_netdev(struct cnic_dev *dev)
2488 {
2489         struct cnic_local *cp = dev->cnic_priv;
2490         struct cnic_eth_dev *ethdev = cp->ethdev;
2491
2492         if (!ethdev)
2493                 return;
2494
2495         ethdev->drv_unregister_cnic(dev->netdev);
2496 }
2497
2498 static int cnic_start_hw(struct cnic_dev *dev)
2499 {
2500         struct cnic_local *cp = dev->cnic_priv;
2501         struct cnic_eth_dev *ethdev = cp->ethdev;
2502         int err;
2503
2504         if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
2505                 return -EALREADY;
2506
2507         dev->regview = ethdev->io_base;
2508         cp->chip_id = ethdev->chip_id;
2509         pci_dev_get(dev->pcidev);
2510         cp->func = PCI_FUNC(dev->pcidev->devfn);
2511         cp->status_blk = ethdev->irq_arr[0].status_blk;
2512         cp->status_blk_num = ethdev->irq_arr[0].status_blk_num;
2513
2514         err = cp->alloc_resc(dev);
2515         if (err) {
2516                 printk(KERN_ERR PFX "%s: allocate resource failure\n",
2517                        dev->netdev->name);
2518                 goto err1;
2519         }
2520
2521         err = cp->start_hw(dev);
2522         if (err)
2523                 goto err1;
2524
2525         err = cnic_cm_open(dev);
2526         if (err)
2527                 goto err1;
2528
2529         set_bit(CNIC_F_CNIC_UP, &dev->flags);
2530
2531         cp->enable_int(dev);
2532
2533         return 0;
2534
2535 err1:
2536         cp->free_resc(dev);
2537         pci_dev_put(dev->pcidev);
2538         return err;
2539 }
2540
2541 static void cnic_stop_bnx2_hw(struct cnic_dev *dev)
2542 {
2543         cnic_disable_bnx2_int_sync(dev);
2544
2545         cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2546         cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2547
2548         cnic_init_context(dev, KWQ_CID);
2549         cnic_init_context(dev, KCQ_CID);
2550
2551         cnic_setup_5709_context(dev, 0);
2552         cnic_free_irq(dev);
2553
2554         cnic_free_resc(dev);
2555 }
2556
2557 static void cnic_stop_hw(struct cnic_dev *dev)
2558 {
2559         if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2560                 struct cnic_local *cp = dev->cnic_priv;
2561
2562                 clear_bit(CNIC_F_CNIC_UP, &dev->flags);
2563                 rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], NULL);
2564                 synchronize_rcu();
2565                 cnic_cm_shutdown(dev);
2566                 cp->stop_hw(dev);
2567                 pci_dev_put(dev->pcidev);
2568         }
2569 }
2570
2571 static void cnic_free_dev(struct cnic_dev *dev)
2572 {
2573         int i = 0;
2574
2575         while ((atomic_read(&dev->ref_count) != 0) && i < 10) {
2576                 msleep(100);
2577                 i++;
2578         }
2579         if (atomic_read(&dev->ref_count) != 0)
2580                 printk(KERN_ERR PFX "%s: Failed waiting for ref count to go"
2581                                     " to zero.\n", dev->netdev->name);
2582
2583         printk(KERN_INFO PFX "Removed CNIC device: %s\n", dev->netdev->name);
2584         dev_put(dev->netdev);
2585         kfree(dev);
2586 }
2587
2588 static struct cnic_dev *cnic_alloc_dev(struct net_device *dev,
2589                                        struct pci_dev *pdev)
2590 {
2591         struct cnic_dev *cdev;
2592         struct cnic_local *cp;
2593         int alloc_size;
2594
2595         alloc_size = sizeof(struct cnic_dev) + sizeof(struct cnic_local);
2596
2597         cdev = kzalloc(alloc_size , GFP_KERNEL);
2598         if (cdev == NULL) {
2599                 printk(KERN_ERR PFX "%s: allocate dev struct failure\n",
2600                        dev->name);
2601                 return NULL;
2602         }
2603
2604         cdev->netdev = dev;
2605         cdev->cnic_priv = (char *)cdev + sizeof(struct cnic_dev);
2606         cdev->register_device = cnic_register_device;
2607         cdev->unregister_device = cnic_unregister_device;
2608         cdev->iscsi_nl_msg_recv = cnic_iscsi_nl_msg_recv;
2609
2610         cp = cdev->cnic_priv;
2611         cp->dev = cdev;
2612         cp->uio_dev = -1;
2613         cp->l2_single_buf_size = 0x400;
2614         cp->l2_rx_ring_size = 3;
2615
2616         spin_lock_init(&cp->cnic_ulp_lock);
2617
2618         printk(KERN_INFO PFX "Added CNIC device: %s\n", dev->name);
2619
2620         return cdev;
2621 }
2622
2623 static struct cnic_dev *init_bnx2_cnic(struct net_device *dev)
2624 {
2625         struct pci_dev *pdev;
2626         struct cnic_dev *cdev;
2627         struct cnic_local *cp;
2628         struct cnic_eth_dev *ethdev = NULL;
2629         struct cnic_eth_dev *(*probe)(struct net_device *) = NULL;
2630
2631         probe = symbol_get(bnx2_cnic_probe);
2632         if (probe) {
2633                 ethdev = (*probe)(dev);
2634                 symbol_put(bnx2_cnic_probe);
2635         }
2636         if (!ethdev)
2637                 return NULL;
2638
2639         pdev = ethdev->pdev;
2640         if (!pdev)
2641                 return NULL;
2642
2643         dev_hold(dev);
2644         pci_dev_get(pdev);
2645         if (pdev->device == PCI_DEVICE_ID_NX2_5709 ||
2646             pdev->device == PCI_DEVICE_ID_NX2_5709S) {
2647                 u8 rev;
2648
2649                 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
2650                 if (rev < 0x10) {
2651                         pci_dev_put(pdev);
2652                         goto cnic_err;
2653                 }
2654         }
2655         pci_dev_put(pdev);
2656
2657         cdev = cnic_alloc_dev(dev, pdev);
2658         if (cdev == NULL)
2659                 goto cnic_err;
2660
2661         set_bit(CNIC_F_BNX2_CLASS, &cdev->flags);
2662         cdev->submit_kwqes = cnic_submit_bnx2_kwqes;
2663
2664         cp = cdev->cnic_priv;
2665         cp->ethdev = ethdev;
2666         cdev->pcidev = pdev;
2667
2668         cp->cnic_ops = &cnic_bnx2_ops;
2669         cp->start_hw = cnic_start_bnx2_hw;
2670         cp->stop_hw = cnic_stop_bnx2_hw;
2671         cp->setup_pgtbl = cnic_setup_page_tbl;
2672         cp->alloc_resc = cnic_alloc_bnx2_resc;
2673         cp->free_resc = cnic_free_resc;
2674         cp->start_cm = cnic_cm_init_bnx2_hw;
2675         cp->stop_cm = cnic_cm_stop_bnx2_hw;
2676         cp->enable_int = cnic_enable_bnx2_int;
2677         cp->disable_int_sync = cnic_disable_bnx2_int_sync;
2678         cp->close_conn = cnic_close_bnx2_conn;
2679         cp->next_idx = cnic_bnx2_next_idx;
2680         cp->hw_idx = cnic_bnx2_hw_idx;
2681         return cdev;
2682
2683 cnic_err:
2684         dev_put(dev);
2685         return NULL;
2686 }
2687
2688 static struct cnic_dev *is_cnic_dev(struct net_device *dev)
2689 {
2690         struct ethtool_drvinfo drvinfo;
2691         struct cnic_dev *cdev = NULL;
2692
2693         if (dev->ethtool_ops && dev->ethtool_ops->get_drvinfo) {
2694                 memset(&drvinfo, 0, sizeof(drvinfo));
2695                 dev->ethtool_ops->get_drvinfo(dev, &drvinfo);
2696
2697                 if (!strcmp(drvinfo.driver, "bnx2"))
2698                         cdev = init_bnx2_cnic(dev);
2699                 if (cdev) {
2700                         write_lock(&cnic_dev_lock);
2701                         list_add(&cdev->list, &cnic_dev_list);
2702                         write_unlock(&cnic_dev_lock);
2703                 }
2704         }
2705         return cdev;
2706 }
2707
2708 /**
2709  * netdev event handler
2710  */
2711 static int cnic_netdev_event(struct notifier_block *this, unsigned long event,
2712                                                          void *ptr)
2713 {
2714         struct net_device *netdev = ptr;
2715         struct cnic_dev *dev;
2716         int if_type;
2717         int new_dev = 0;
2718
2719         dev = cnic_from_netdev(netdev);
2720
2721         if (!dev && (event == NETDEV_REGISTER || event == NETDEV_UP)) {
2722                 /* Check for the hot-plug device */
2723                 dev = is_cnic_dev(netdev);
2724                 if (dev) {
2725                         new_dev = 1;
2726                         cnic_hold(dev);
2727                 }
2728         }
2729         if (dev) {
2730                 struct cnic_local *cp = dev->cnic_priv;
2731
2732                 if (new_dev)
2733                         cnic_ulp_init(dev);
2734                 else if (event == NETDEV_UNREGISTER)
2735                         cnic_ulp_exit(dev);
2736                 else if (event == NETDEV_UP) {
2737                         if (cnic_register_netdev(dev) != 0) {
2738                                 cnic_put(dev);
2739                                 goto done;
2740                         }
2741                         if (!cnic_start_hw(dev))
2742                                 cnic_ulp_start(dev);
2743                 }
2744
2745                 rcu_read_lock();
2746                 for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
2747                         struct cnic_ulp_ops *ulp_ops;
2748                         void *ctx;
2749
2750                         ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
2751                         if (!ulp_ops || !ulp_ops->indicate_netevent)
2752                                 continue;
2753
2754                         ctx = cp->ulp_handle[if_type];
2755
2756                         ulp_ops->indicate_netevent(ctx, event);
2757                 }
2758                 rcu_read_unlock();
2759
2760                 if (event == NETDEV_GOING_DOWN) {
2761                         cnic_ulp_stop(dev);
2762                         cnic_stop_hw(dev);
2763                         cnic_unregister_netdev(dev);
2764                 } else if (event == NETDEV_UNREGISTER) {
2765                         write_lock(&cnic_dev_lock);
2766                         list_del_init(&dev->list);
2767                         write_unlock(&cnic_dev_lock);
2768
2769                         cnic_put(dev);
2770                         cnic_free_dev(dev);
2771                         goto done;
2772                 }
2773                 cnic_put(dev);
2774         }
2775 done:
2776         return NOTIFY_DONE;
2777 }
2778
2779 static struct notifier_block cnic_netdev_notifier = {
2780         .notifier_call = cnic_netdev_event
2781 };
2782
2783 static void cnic_release(void)
2784 {
2785         struct cnic_dev *dev;
2786
2787         while (!list_empty(&cnic_dev_list)) {
2788                 dev = list_entry(cnic_dev_list.next, struct cnic_dev, list);
2789                 if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2790                         cnic_ulp_stop(dev);
2791                         cnic_stop_hw(dev);
2792                 }
2793
2794                 cnic_ulp_exit(dev);
2795                 cnic_unregister_netdev(dev);
2796                 list_del_init(&dev->list);
2797                 cnic_free_dev(dev);
2798         }
2799 }
2800
2801 static int __init cnic_init(void)
2802 {
2803         int rc = 0;
2804
2805         printk(KERN_INFO "%s", version);
2806
2807         rc = register_netdevice_notifier(&cnic_netdev_notifier);
2808         if (rc) {
2809                 cnic_release();
2810                 return rc;
2811         }
2812
2813         return 0;
2814 }
2815
2816 static void __exit cnic_exit(void)
2817 {
2818         unregister_netdevice_notifier(&cnic_netdev_notifier);
2819         cnic_release();
2820         return;
2821 }
2822
2823 module_init(cnic_init);
2824 module_exit(cnic_exit);