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   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 "bnx2x_reg.h"
  41 #include "bnx2x_fw_defs.h"
  42 #include "bnx2x_hsi.h"
  43 #include "../scsi/bnx2i/57xx_iscsi_constants.h"
  44 #include "../scsi/bnx2i/57xx_iscsi_hsi.h"
  45 #include "cnic.h"
  46 #include "cnic_defs.h"
  47
  48 #define DRV_MODULE_NAME         "cnic"
  49 #define PFX DRV_MODULE_NAME     ": "
  50
  51 static char version[] __devinitdata =
  52         "Broadcom NetXtreme II CNIC Driver " DRV_MODULE_NAME " v" CNIC_MODULE_VERSION " (" CNIC_MODULE_RELDATE ")\n";
  53
  54 MODULE_AUTHOR("Michael Chan <mchan@broadcom.com> and John(Zongxi) "
  55               "Chen (zongxi@broadcom.com");
  56 MODULE_DESCRIPTION("Broadcom NetXtreme II CNIC Driver");
  57 MODULE_LICENSE("GPL");
  58 MODULE_VERSION(CNIC_MODULE_VERSION);
  59
  60 static LIST_HEAD(cnic_dev_list);
  61 static DEFINE_RWLOCK(cnic_dev_lock);
  62 static DEFINE_MUTEX(cnic_lock);
  63
  64 static struct cnic_ulp_ops *cnic_ulp_tbl[MAX_CNIC_ULP_TYPE];
  65
  66 static int cnic_service_bnx2(void *, void *);
  67 static int cnic_ctl(void *, struct cnic_ctl_info *);
  68
  69 static struct cnic_ops cnic_bnx2_ops = {
  70         .cnic_owner     = THIS_MODULE,
  71         .cnic_handler   = cnic_service_bnx2,
  72         .cnic_ctl       = cnic_ctl,
  73 };
  74
  75 static void cnic_shutdown_rings(struct cnic_dev *);
  76 static void cnic_init_rings(struct cnic_dev *);
  77 static int cnic_cm_set_pg(struct cnic_sock *);
  78
  79 static int cnic_uio_open(struct uio_info *uinfo, struct inode *inode)
  80 {
  81         struct cnic_dev *dev = uinfo->priv;
  82         struct cnic_local *cp = dev->cnic_priv;
  83
  84         if (!capable(CAP_NET_ADMIN))
  85                 return -EPERM;
  86
  87         if (cp->uio_dev != -1)
  88                 return -EBUSY;
  89
  90         rtnl_lock();
  91         if (!test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
  92                 rtnl_unlock();
  93                 return -ENODEV;
  94         }
  95
  96         cp->uio_dev = iminor(inode);
  97
  98         cnic_init_rings(dev);
  99         rtnl_unlock();
 100
 101         return 0;
 102 }
 103
 104 static int cnic_uio_close(struct uio_info *uinfo, struct inode *inode)
 105 {
 106         struct cnic_dev *dev = uinfo->priv;
 107         struct cnic_local *cp = dev->cnic_priv;
 108
 109         cnic_shutdown_rings(dev);
 110
 111         cp->uio_dev = -1;
 112         return 0;
 113 }
 114
 115 static inline void cnic_hold(struct cnic_dev *dev)
 116 {
 117         atomic_inc(&dev->ref_count);
 118 }
 119
 120 static inline void cnic_put(struct cnic_dev *dev)
 121 {
 122         atomic_dec(&dev->ref_count);
 123 }
 124
 125 static inline void csk_hold(struct cnic_sock *csk)
 126 {
 127         atomic_inc(&csk->ref_count);
 128 }
 129
 130 static inline void csk_put(struct cnic_sock *csk)
 131 {
 132         atomic_dec(&csk->ref_count);
 133 }
 134
 135 static struct cnic_dev *cnic_from_netdev(struct net_device *netdev)
 136 {
 137         struct cnic_dev *cdev;
 138
 139         read_lock(&cnic_dev_lock);
 140         list_for_each_entry(cdev, &cnic_dev_list, list) {
 141                 if (netdev == cdev->netdev) {
 142                         cnic_hold(cdev);
 143                         read_unlock(&cnic_dev_lock);
 144                         return cdev;
 145                 }
 146         }
 147         read_unlock(&cnic_dev_lock);
 148         return NULL;
 149 }
 150
 151 static inline void ulp_get(struct cnic_ulp_ops *ulp_ops)
 152 {
 153         atomic_inc(&ulp_ops->ref_count);
 154 }
 155
 156 static inline void ulp_put(struct cnic_ulp_ops *ulp_ops)
 157 {
 158         atomic_dec(&ulp_ops->ref_count);
 159 }
 160
 161 static void cnic_ctx_wr(struct cnic_dev *dev, u32 cid_addr, u32 off, u32 val)
 162 {
 163         struct cnic_local *cp = dev->cnic_priv;
 164         struct cnic_eth_dev *ethdev = cp->ethdev;
 165         struct drv_ctl_info info;
 166         struct drv_ctl_io *io = &info.data.io;
 167
 168         info.cmd = DRV_CTL_CTX_WR_CMD;
 169         io->cid_addr = cid_addr;
 170         io->offset = off;
 171         io->data = val;
 172         ethdev->drv_ctl(dev->netdev, &info);
 173 }
 174
 175 static void cnic_reg_wr_ind(struct cnic_dev *dev, u32 off, u32 val)
 176 {
 177         struct cnic_local *cp = dev->cnic_priv;
 178         struct cnic_eth_dev *ethdev = cp->ethdev;
 179         struct drv_ctl_info info;
 180         struct drv_ctl_io *io = &info.data.io;
 181
 182         info.cmd = DRV_CTL_IO_WR_CMD;
 183         io->offset = off;
 184         io->data = val;
 185         ethdev->drv_ctl(dev->netdev, &info);
 186 }
 187
 188 static u32 cnic_reg_rd_ind(struct cnic_dev *dev, u32 off)
 189 {
 190         struct cnic_local *cp = dev->cnic_priv;
 191         struct cnic_eth_dev *ethdev = cp->ethdev;
 192         struct drv_ctl_info info;
 193         struct drv_ctl_io *io = &info.data.io;
 194
 195         info.cmd = DRV_CTL_IO_RD_CMD;
 196         io->offset = off;
 197         ethdev->drv_ctl(dev->netdev, &info);
 198         return io->data;
 199 }
 200
 201 static int cnic_in_use(struct cnic_sock *csk)
 202 {
 203         return test_bit(SK_F_INUSE, &csk->flags);
 204 }
 205
 206 static void cnic_kwq_completion(struct cnic_dev *dev, u32 count)
 207 {
 208         struct cnic_local *cp = dev->cnic_priv;
 209         struct cnic_eth_dev *ethdev = cp->ethdev;
 210         struct drv_ctl_info info;
 211
 212         info.cmd = DRV_CTL_COMPLETION_CMD;
 213         info.data.comp.comp_count = count;
 214         ethdev->drv_ctl(dev->netdev, &info);
 215 }
 216
 217 static int cnic_send_nlmsg(struct cnic_local *cp, u32 type,
 218                            struct cnic_sock *csk)
 219 {
 220         struct iscsi_path path_req;
 221         char *buf = NULL;
 222         u16 len = 0;
 223         u32 msg_type = ISCSI_KEVENT_IF_DOWN;
 224         struct cnic_ulp_ops *ulp_ops;
 225
 226         if (cp->uio_dev == -1)
 227                 return -ENODEV;
 228
 229         if (csk) {
 230                 len = sizeof(path_req);
 231                 buf = (char *) &path_req;
 232                 memset(&path_req, 0, len);
 233
 234                 msg_type = ISCSI_KEVENT_PATH_REQ;
 235                 path_req.handle = (u64) csk->l5_cid;
 236                 if (test_bit(SK_F_IPV6, &csk->flags)) {
 237                         memcpy(&path_req.dst.v6_addr, &csk->dst_ip[0],
 238                                sizeof(struct in6_addr));
 239                         path_req.ip_addr_len = 16;
 240                 } else {
 241                         memcpy(&path_req.dst.v4_addr, &csk->dst_ip[0],
 242                                sizeof(struct in_addr));
 243                         path_req.ip_addr_len = 4;
 244                 }
 245                 path_req.vlan_id = csk->vlan_id;
 246                 path_req.pmtu = csk->mtu;
 247         }
 248
 249         rcu_read_lock();
 250         ulp_ops = rcu_dereference(cnic_ulp_tbl[CNIC_ULP_ISCSI]);
 251         if (ulp_ops)
 252                 ulp_ops->iscsi_nl_send_msg(cp->dev, msg_type, buf, len);
 253         rcu_read_unlock();
 254         return 0;
 255 }
 256
 257 static int cnic_iscsi_nl_msg_recv(struct cnic_dev *dev, u32 msg_type,
 258                                   char *buf, u16 len)
 259 {
 260         int rc = -EINVAL;
 261
 262         switch (msg_type) {
 263         case ISCSI_UEVENT_PATH_UPDATE: {
 264                 struct cnic_local *cp;
 265                 u32 l5_cid;
 266                 struct cnic_sock *csk;
 267                 struct iscsi_path *path_resp;
 268
 269                 if (len < sizeof(*path_resp))
 270                         break;
 271
 272                 path_resp = (struct iscsi_path *) buf;
 273                 cp = dev->cnic_priv;
 274                 l5_cid = (u32) path_resp->handle;
 275                 if (l5_cid >= MAX_CM_SK_TBL_SZ)
 276                         break;
 277
 278                 csk = &cp->csk_tbl[l5_cid];
 279                 csk_hold(csk);
 280                 if (cnic_in_use(csk)) {
 281                         memcpy(csk->ha, path_resp->mac_addr, 6);
 282                         if (test_bit(SK_F_IPV6, &csk->flags))
 283                                 memcpy(&csk->src_ip[0], &path_resp->src.v6_addr,
 284                                        sizeof(struct in6_addr));
 285                         else
 286                                 memcpy(&csk->src_ip[0], &path_resp->src.v4_addr,
 287                                        sizeof(struct in_addr));
 288                         if (is_valid_ether_addr(csk->ha))
 289                                 cnic_cm_set_pg(csk);
 290                 }
 291                 csk_put(csk);
 292                 rc = 0;
 293         }
 294         }
 295
 296         return rc;
 297 }
 298
 299 static int cnic_offld_prep(struct cnic_sock *csk)
 300 {
 301         if (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
 302                 return 0;
 303
 304         if (!test_bit(SK_F_CONNECT_START, &csk->flags)) {
 305                 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
 306                 return 0;
 307         }
 308
 309         return 1;
 310 }
 311
 312 static int cnic_close_prep(struct cnic_sock *csk)
 313 {
 314         clear_bit(SK_F_CONNECT_START, &csk->flags);
 315         smp_mb__after_clear_bit();
 316
 317         if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags)) {
 318                 while (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
 319                         msleep(1);
 320
 321                 return 1;
 322         }
 323         return 0;
 324 }
 325
 326 static int cnic_abort_prep(struct cnic_sock *csk)
 327 {
 328         clear_bit(SK_F_CONNECT_START, &csk->flags);
 329         smp_mb__after_clear_bit();
 330
 331         while (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
 332                 msleep(1);
 333
 334         if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags)) {
 335                 csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
 336                 return 1;
 337         }
 338
 339         return 0;
 340 }
 341
 342 static void cnic_uio_stop(void)
 343 {
 344         struct cnic_dev *dev;
 345
 346         read_lock(&cnic_dev_lock);
 347         list_for_each_entry(dev, &cnic_dev_list, list) {
 348                 struct cnic_local *cp = dev->cnic_priv;
 349
 350                 if (cp->cnic_uinfo)
 351                         cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
 352         }
 353         read_unlock(&cnic_dev_lock);
 354 }
 355
 356 int cnic_register_driver(int ulp_type, struct cnic_ulp_ops *ulp_ops)
 357 {
 358         struct cnic_dev *dev;
 359
 360         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 361                 printk(KERN_ERR PFX "cnic_register_driver: Bad type %d\n",
 362                        ulp_type);
 363                 return -EINVAL;
 364         }
 365         mutex_lock(&cnic_lock);
 366         if (cnic_ulp_tbl[ulp_type]) {
 367                 printk(KERN_ERR PFX "cnic_register_driver: Type %d has already "
 368                                     "been registered\n", ulp_type);
 369                 mutex_unlock(&cnic_lock);
 370                 return -EBUSY;
 371         }
 372
 373         read_lock(&cnic_dev_lock);
 374         list_for_each_entry(dev, &cnic_dev_list, list) {
 375                 struct cnic_local *cp = dev->cnic_priv;
 376
 377                 clear_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]);
 378         }
 379         read_unlock(&cnic_dev_lock);
 380
 381         atomic_set(&ulp_ops->ref_count, 0);
 382         rcu_assign_pointer(cnic_ulp_tbl[ulp_type], ulp_ops);
 383         mutex_unlock(&cnic_lock);
 384
 385         /* Prevent race conditions with netdev_event */
 386         rtnl_lock();
 387         read_lock(&cnic_dev_lock);
 388         list_for_each_entry(dev, &cnic_dev_list, list) {
 389                 struct cnic_local *cp = dev->cnic_priv;
 390
 391                 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]))
 392                         ulp_ops->cnic_init(dev);
 393         }
 394         read_unlock(&cnic_dev_lock);
 395         rtnl_unlock();
 396
 397         return 0;
 398 }
 399
 400 int cnic_unregister_driver(int ulp_type)
 401 {
 402         struct cnic_dev *dev;
 403         struct cnic_ulp_ops *ulp_ops;
 404         int i = 0;
 405
 406         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 407                 printk(KERN_ERR PFX "cnic_unregister_driver: Bad type %d\n",
 408                        ulp_type);
 409                 return -EINVAL;
 410         }
 411         mutex_lock(&cnic_lock);
 412         ulp_ops = cnic_ulp_tbl[ulp_type];
 413         if (!ulp_ops) {
 414                 printk(KERN_ERR PFX "cnic_unregister_driver: Type %d has not "
 415                                     "been registered\n", ulp_type);
 416                 goto out_unlock;
 417         }
 418         read_lock(&cnic_dev_lock);
 419         list_for_each_entry(dev, &cnic_dev_list, list) {
 420                 struct cnic_local *cp = dev->cnic_priv;
 421
 422                 if (rcu_dereference(cp->ulp_ops[ulp_type])) {
 423                         printk(KERN_ERR PFX "cnic_unregister_driver: Type %d "
 424                                "still has devices registered\n", ulp_type);
 425                         read_unlock(&cnic_dev_lock);
 426                         goto out_unlock;
 427                 }
 428         }
 429         read_unlock(&cnic_dev_lock);
 430
 431         if (ulp_type == CNIC_ULP_ISCSI)
 432                 cnic_uio_stop();
 433
 434         rcu_assign_pointer(cnic_ulp_tbl[ulp_type], NULL);
 435
 436         mutex_unlock(&cnic_lock);
 437         synchronize_rcu();
 438         while ((atomic_read(&ulp_ops->ref_count) != 0) && (i < 20)) {
 439                 msleep(100);
 440                 i++;
 441         }
 442
 443         if (atomic_read(&ulp_ops->ref_count) != 0)
 444                 printk(KERN_WARNING PFX "%s: Failed waiting for ref count to go"
 445                                         " to zero.\n", dev->netdev->name);
 446         return 0;
 447
 448 out_unlock:
 449         mutex_unlock(&cnic_lock);
 450         return -EINVAL;
 451 }
 452
 453 static int cnic_start_hw(struct cnic_dev *);
 454 static void cnic_stop_hw(struct cnic_dev *);
 455
 456 static int cnic_register_device(struct cnic_dev *dev, int ulp_type,
 457                                 void *ulp_ctx)
 458 {
 459         struct cnic_local *cp = dev->cnic_priv;
 460         struct cnic_ulp_ops *ulp_ops;
 461
 462         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 463                 printk(KERN_ERR PFX "cnic_register_device: Bad type %d\n",
 464                        ulp_type);
 465                 return -EINVAL;
 466         }
 467         mutex_lock(&cnic_lock);
 468         if (cnic_ulp_tbl[ulp_type] == NULL) {
 469                 printk(KERN_ERR PFX "cnic_register_device: Driver with type %d "
 470                                     "has not been registered\n", ulp_type);
 471                 mutex_unlock(&cnic_lock);
 472                 return -EAGAIN;
 473         }
 474         if (rcu_dereference(cp->ulp_ops[ulp_type])) {
 475                 printk(KERN_ERR PFX "cnic_register_device: Type %d has already "
 476                        "been registered to this device\n", ulp_type);
 477                 mutex_unlock(&cnic_lock);
 478                 return -EBUSY;
 479         }
 480
 481         clear_bit(ULP_F_START, &cp->ulp_flags[ulp_type]);
 482         cp->ulp_handle[ulp_type] = ulp_ctx;
 483         ulp_ops = cnic_ulp_tbl[ulp_type];
 484         rcu_assign_pointer(cp->ulp_ops[ulp_type], ulp_ops);
 485         cnic_hold(dev);
 486
 487         if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
 488                 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[ulp_type]))
 489                         ulp_ops->cnic_start(cp->ulp_handle[ulp_type]);
 490
 491         mutex_unlock(&cnic_lock);
 492
 493         return 0;
 494
 495 }
 496 EXPORT_SYMBOL(cnic_register_driver);
 497
 498 static int cnic_unregister_device(struct cnic_dev *dev, int ulp_type)
 499 {
 500         struct cnic_local *cp = dev->cnic_priv;
 501         int i = 0;
 502
 503         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 504                 printk(KERN_ERR PFX "cnic_unregister_device: Bad type %d\n",
 505                        ulp_type);
 506                 return -EINVAL;
 507         }
 508         mutex_lock(&cnic_lock);
 509         if (rcu_dereference(cp->ulp_ops[ulp_type])) {
 510                 rcu_assign_pointer(cp->ulp_ops[ulp_type], NULL);
 511                 cnic_put(dev);
 512         } else {
 513                 printk(KERN_ERR PFX "cnic_unregister_device: device not "
 514                        "registered to this ulp type %d\n", ulp_type);
 515                 mutex_unlock(&cnic_lock);
 516                 return -EINVAL;
 517         }
 518         mutex_unlock(&cnic_lock);
 519
 520         synchronize_rcu();
 521
 522         while (test_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[ulp_type]) &&
 523                i < 20) {
 524                 msleep(100);
 525                 i++;
 526         }
 527         if (test_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[ulp_type]))
 528                 printk(KERN_WARNING PFX "%s: Failed waiting for ULP up call"
 529                                         " to complete.\n", dev->netdev->name);
 530
 531         return 0;
 532 }
 533 EXPORT_SYMBOL(cnic_unregister_driver);
 534
 535 static int cnic_init_id_tbl(struct cnic_id_tbl *id_tbl, u32 size, u32 start_id)
 536 {
 537         id_tbl->start = start_id;
 538         id_tbl->max = size;
 539         id_tbl->next = 0;
 540         spin_lock_init(&id_tbl->lock);
 541         id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
 542         if (!id_tbl->table)
 543                 return -ENOMEM;
 544
 545         return 0;
 546 }
 547
 548 static void cnic_free_id_tbl(struct cnic_id_tbl *id_tbl)
 549 {
 550         kfree(id_tbl->table);
 551         id_tbl->table = NULL;
 552 }
 553
 554 static int cnic_alloc_id(struct cnic_id_tbl *id_tbl, u32 id)
 555 {
 556         int ret = -1;
 557
 558         id -= id_tbl->start;
 559         if (id >= id_tbl->max)
 560                 return ret;
 561
 562         spin_lock(&id_tbl->lock);
 563         if (!test_bit(id, id_tbl->table)) {
 564                 set_bit(id, id_tbl->table);
 565                 ret = 0;
 566         }
 567         spin_unlock(&id_tbl->lock);
 568         return ret;
 569 }
 570
 571 /* Returns -1 if not successful */
 572 static u32 cnic_alloc_new_id(struct cnic_id_tbl *id_tbl)
 573 {
 574         u32 id;
 575
 576         spin_lock(&id_tbl->lock);
 577         id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
 578         if (id >= id_tbl->max) {
 579                 id = -1;
 580                 if (id_tbl->next != 0) {
 581                         id = find_first_zero_bit(id_tbl->table, id_tbl->next);
 582                         if (id >= id_tbl->next)
 583                                 id = -1;
 584                 }
 585         }
 586
 587         if (id < id_tbl->max) {
 588                 set_bit(id, id_tbl->table);
 589                 id_tbl->next = (id + 1) & (id_tbl->max - 1);
 590                 id += id_tbl->start;
 591         }
 592
 593         spin_unlock(&id_tbl->lock);
 594
 595         return id;
 596 }
 597
 598 static void cnic_free_id(struct cnic_id_tbl *id_tbl, u32 id)
 599 {
 600         if (id == -1)
 601                 return;
 602
 603         id -= id_tbl->start;
 604         if (id >= id_tbl->max)
 605                 return;
 606
 607         clear_bit(id, id_tbl->table);
 608 }
 609
 610 static void cnic_free_dma(struct cnic_dev *dev, struct cnic_dma *dma)
 611 {
 612         int i;
 613
 614         if (!dma->pg_arr)
 615                 return;
 616
 617         for (i = 0; i < dma->num_pages; i++) {
 618                 if (dma->pg_arr[i]) {
 619                         pci_free_consistent(dev->pcidev, BCM_PAGE_SIZE,
 620                                             dma->pg_arr[i], dma->pg_map_arr[i]);
 621                         dma->pg_arr[i] = NULL;
 622                 }
 623         }
 624         if (dma->pgtbl) {
 625                 pci_free_consistent(dev->pcidev, dma->pgtbl_size,
 626                                     dma->pgtbl, dma->pgtbl_map);
 627                 dma->pgtbl = NULL;
 628         }
 629         kfree(dma->pg_arr);
 630         dma->pg_arr = NULL;
 631         dma->num_pages = 0;
 632 }
 633
 634 static void cnic_setup_page_tbl(struct cnic_dev *dev, struct cnic_dma *dma)
 635 {
 636         int i;
 637         u32 *page_table = dma->pgtbl;
 638
 639         for (i = 0; i < dma->num_pages; i++) {
 640                 /* Each entry needs to be in big endian format. */
 641                 *page_table = (u32) ((u64) dma->pg_map_arr[i] >> 32);
 642                 page_table++;
 643                 *page_table = (u32) dma->pg_map_arr[i];
 644                 page_table++;
 645         }
 646 }
 647
 648 static int cnic_alloc_dma(struct cnic_dev *dev, struct cnic_dma *dma,
 649                           int pages, int use_pg_tbl)
 650 {
 651         int i, size;
 652         struct cnic_local *cp = dev->cnic_priv;
 653
 654         size = pages * (sizeof(void *) + sizeof(dma_addr_t));
 655         dma->pg_arr = kzalloc(size, GFP_ATOMIC);
 656         if (dma->pg_arr == NULL)
 657                 return -ENOMEM;
 658
 659         dma->pg_map_arr = (dma_addr_t *) (dma->pg_arr + pages);
 660         dma->num_pages = pages;
 661
 662         for (i = 0; i < pages; i++) {
 663                 dma->pg_arr[i] = pci_alloc_consistent(dev->pcidev,
 664                                                       BCM_PAGE_SIZE,
 665                                                       &dma->pg_map_arr[i]);
 666                 if (dma->pg_arr[i] == NULL)
 667                         goto error;
 668         }
 669         if (!use_pg_tbl)
 670                 return 0;
 671
 672         dma->pgtbl_size = ((pages * 8) + BCM_PAGE_SIZE - 1) &
 673                           ~(BCM_PAGE_SIZE - 1);
 674         dma->pgtbl = pci_alloc_consistent(dev->pcidev, dma->pgtbl_size,
 675                                           &dma->pgtbl_map);
 676         if (dma->pgtbl == NULL)
 677                 goto error;
 678
 679         cp->setup_pgtbl(dev, dma);
 680
 681         return 0;
 682
 683 error:
 684         cnic_free_dma(dev, dma);
 685         return -ENOMEM;
 686 }
 687
 688 static void cnic_free_context(struct cnic_dev *dev)
 689 {
 690         struct cnic_local *cp = dev->cnic_priv;
 691         int i;
 692
 693         for (i = 0; i < cp->ctx_blks; i++) {
 694                 if (cp->ctx_arr[i].ctx) {
 695                         pci_free_consistent(dev->pcidev, cp->ctx_blk_size,
 696                                             cp->ctx_arr[i].ctx,
 697                                             cp->ctx_arr[i].mapping);
 698                         cp->ctx_arr[i].ctx = NULL;
 699                 }
 700         }
 701 }
 702
 703 static void cnic_free_resc(struct cnic_dev *dev)
 704 {
 705         struct cnic_local *cp = dev->cnic_priv;
 706         int i = 0;
 707
 708         if (cp->cnic_uinfo) {
 709                 while (cp->uio_dev != -1 && i < 15) {
 710                         msleep(100);
 711                         i++;
 712                 }
 713                 uio_unregister_device(cp->cnic_uinfo);
 714                 kfree(cp->cnic_uinfo);
 715                 cp->cnic_uinfo = NULL;
 716         }
 717
 718         if (cp->l2_buf) {
 719                 pci_free_consistent(dev->pcidev, cp->l2_buf_size,
 720                                     cp->l2_buf, cp->l2_buf_map);
 721                 cp->l2_buf = NULL;
 722         }
 723
 724         if (cp->l2_ring) {
 725                 pci_free_consistent(dev->pcidev, cp->l2_ring_size,
 726                                     cp->l2_ring, cp->l2_ring_map);
 727                 cp->l2_ring = NULL;
 728         }
 729
 730         cnic_free_context(dev);
 731         kfree(cp->ctx_arr);
 732         cp->ctx_arr = NULL;
 733         cp->ctx_blks = 0;
 734
 735         cnic_free_dma(dev, &cp->gbl_buf_info);
 736         cnic_free_dma(dev, &cp->conn_buf_info);
 737         cnic_free_dma(dev, &cp->kwq_info);
 738         cnic_free_dma(dev, &cp->kcq_info);
 739         kfree(cp->iscsi_tbl);
 740         cp->iscsi_tbl = NULL;
 741         kfree(cp->ctx_tbl);
 742         cp->ctx_tbl = NULL;
 743
 744         cnic_free_id_tbl(&cp->cid_tbl);
 745 }
 746
 747 static int cnic_alloc_context(struct cnic_dev *dev)
 748 {
 749         struct cnic_local *cp = dev->cnic_priv;
 750
 751         if (CHIP_NUM(cp) == CHIP_NUM_5709) {
 752                 int i, k, arr_size;
 753
 754                 cp->ctx_blk_size = BCM_PAGE_SIZE;
 755                 cp->cids_per_blk = BCM_PAGE_SIZE / 128;
 756                 arr_size = BNX2_MAX_CID / cp->cids_per_blk *
 757                            sizeof(struct cnic_ctx);
 758                 cp->ctx_arr = kzalloc(arr_size, GFP_KERNEL);
 759                 if (cp->ctx_arr == NULL)
 760                         return -ENOMEM;
 761
 762                 k = 0;
 763                 for (i = 0; i < 2; i++) {
 764                         u32 j, reg, off, lo, hi;
 765
 766                         if (i == 0)
 767                                 off = BNX2_PG_CTX_MAP;
 768                         else
 769                                 off = BNX2_ISCSI_CTX_MAP;
 770
 771                         reg = cnic_reg_rd_ind(dev, off);
 772                         lo = reg >> 16;
 773                         hi = reg & 0xffff;
 774                         for (j = lo; j < hi; j += cp->cids_per_blk, k++)
 775                                 cp->ctx_arr[k].cid = j;
 776                 }
 777
 778                 cp->ctx_blks = k;
 779                 if (cp->ctx_blks >= (BNX2_MAX_CID / cp->cids_per_blk)) {
 780                         cp->ctx_blks = 0;
 781                         return -ENOMEM;
 782                 }
 783
 784                 for (i = 0; i < cp->ctx_blks; i++) {
 785                         cp->ctx_arr[i].ctx =
 786                                 pci_alloc_consistent(dev->pcidev, BCM_PAGE_SIZE,
 787                                                      &cp->ctx_arr[i].mapping);
 788                         if (cp->ctx_arr[i].ctx == NULL)
 789                                 return -ENOMEM;
 790                 }
 791         }
 792         return 0;
 793 }
 794
 795 static int cnic_alloc_l2_rings(struct cnic_dev *dev, int pages)
 796 {
 797         struct cnic_local *cp = dev->cnic_priv;
 798
 799         cp->l2_ring_size = pages * BCM_PAGE_SIZE;
 800         cp->l2_ring = pci_alloc_consistent(dev->pcidev, cp->l2_ring_size,
 801                                            &cp->l2_ring_map);
 802         if (!cp->l2_ring)
 803                 return -ENOMEM;
 804
 805         cp->l2_buf_size = (cp->l2_rx_ring_size + 1) * cp->l2_single_buf_size;
 806         cp->l2_buf_size = PAGE_ALIGN(cp->l2_buf_size);
 807         cp->l2_buf = pci_alloc_consistent(dev->pcidev, cp->l2_buf_size,
 808                                            &cp->l2_buf_map);
 809         if (!cp->l2_buf)
 810                 return -ENOMEM;
 811
 812         return 0;
 813 }
 814
 815 static int cnic_alloc_uio(struct cnic_dev *dev) {
 816         struct cnic_local *cp = dev->cnic_priv;
 817         struct uio_info *uinfo;
 818         int ret;
 819
 820         uinfo = kzalloc(sizeof(*uinfo), GFP_ATOMIC);
 821         if (!uinfo)
 822                 return -ENOMEM;
 823
 824         uinfo->mem[0].addr = dev->netdev->base_addr;
 825         uinfo->mem[0].internal_addr = dev->regview;
 826         uinfo->mem[0].size = dev->netdev->mem_end - dev->netdev->mem_start;
 827         uinfo->mem[0].memtype = UIO_MEM_PHYS;
 828
 829         if (test_bit(CNIC_F_BNX2_CLASS, &dev->flags)) {
 830                 uinfo->mem[1].addr = (unsigned long) cp->status_blk & PAGE_MASK;
 831                 if (cp->ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX)
 832                         uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE * 9;
 833                 else
 834                         uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE;
 835
 836                 uinfo->name = "bnx2_cnic";
 837         }
 838
 839         uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
 840
 841         uinfo->mem[2].addr = (unsigned long) cp->l2_ring;
 842         uinfo->mem[2].size = cp->l2_ring_size;
 843         uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
 844
 845         uinfo->mem[3].addr = (unsigned long) cp->l2_buf;
 846         uinfo->mem[3].size = cp->l2_buf_size;
 847         uinfo->mem[3].memtype = UIO_MEM_LOGICAL;
 848
 849         uinfo->version = CNIC_MODULE_VERSION;
 850         uinfo->irq = UIO_IRQ_CUSTOM;
 851
 852         uinfo->open = cnic_uio_open;
 853         uinfo->release = cnic_uio_close;
 854
 855         uinfo->priv = dev;
 856
 857         ret = uio_register_device(&dev->pcidev->dev, uinfo);
 858         if (ret) {
 859                 kfree(uinfo);
 860                 return ret;
 861         }
 862
 863         cp->cnic_uinfo = uinfo;
 864         return 0;
 865 }
 866
 867 static int cnic_alloc_bnx2_resc(struct cnic_dev *dev)
 868 {
 869         struct cnic_local *cp = dev->cnic_priv;
 870         int ret;
 871
 872         ret = cnic_alloc_dma(dev, &cp->kwq_info, KWQ_PAGE_CNT, 1);
 873         if (ret)
 874                 goto error;
 875         cp->kwq = (struct kwqe **) cp->kwq_info.pg_arr;
 876
 877         ret = cnic_alloc_dma(dev, &cp->kcq_info, KCQ_PAGE_CNT, 1);
 878         if (ret)
 879                 goto error;
 880         cp->kcq = (struct kcqe **) cp->kcq_info.pg_arr;
 881
 882         ret = cnic_alloc_context(dev);
 883         if (ret)
 884                 goto error;
 885
 886         ret = cnic_alloc_l2_rings(dev, 2);
 887         if (ret)
 888                 goto error;
 889
 890         ret = cnic_alloc_uio(dev);
 891         if (ret)
 892                 goto error;
 893
 894         return 0;
 895
 896 error:
 897         cnic_free_resc(dev);
 898         return ret;
 899 }
 900
 901 static inline u32 cnic_kwq_avail(struct cnic_local *cp)
 902 {
 903         return cp->max_kwq_idx -
 904                 ((cp->kwq_prod_idx - cp->kwq_con_idx) & cp->max_kwq_idx);
 905 }
 906
 907 static int cnic_submit_bnx2_kwqes(struct cnic_dev *dev, struct kwqe *wqes[],
 908                                   u32 num_wqes)
 909 {
 910         struct cnic_local *cp = dev->cnic_priv;
 911         struct kwqe *prod_qe;
 912         u16 prod, sw_prod, i;
 913
 914         if (!test_bit(CNIC_F_CNIC_UP, &dev->flags))
 915                 return -EAGAIN;         /* bnx2 is down */
 916
 917         spin_lock_bh(&cp->cnic_ulp_lock);
 918         if (num_wqes > cnic_kwq_avail(cp) &&
 919             !(cp->cnic_local_flags & CNIC_LCL_FL_KWQ_INIT)) {
 920                 spin_unlock_bh(&cp->cnic_ulp_lock);
 921                 return -EAGAIN;
 922         }
 923
 924         cp->cnic_local_flags &= ~CNIC_LCL_FL_KWQ_INIT;
 925
 926         prod = cp->kwq_prod_idx;
 927         sw_prod = prod & MAX_KWQ_IDX;
 928         for (i = 0; i < num_wqes; i++) {
 929                 prod_qe = &cp->kwq[KWQ_PG(sw_prod)][KWQ_IDX(sw_prod)];
 930                 memcpy(prod_qe, wqes[i], sizeof(struct kwqe));
 931                 prod++;
 932                 sw_prod = prod & MAX_KWQ_IDX;
 933         }
 934         cp->kwq_prod_idx = prod;
 935
 936         CNIC_WR16(dev, cp->kwq_io_addr, cp->kwq_prod_idx);
 937
 938         spin_unlock_bh(&cp->cnic_ulp_lock);
 939         return 0;
 940 }
 941
 942 static void service_kcqes(struct cnic_dev *dev, int num_cqes)
 943 {
 944         struct cnic_local *cp = dev->cnic_priv;
 945         int i, j;
 946
 947         i = 0;
 948         j = 1;
 949         while (num_cqes) {
 950                 struct cnic_ulp_ops *ulp_ops;
 951                 int ulp_type;
 952                 u32 kcqe_op_flag = cp->completed_kcq[i]->kcqe_op_flag;
 953                 u32 kcqe_layer = kcqe_op_flag & KCQE_FLAGS_LAYER_MASK;
 954
 955                 if (unlikely(kcqe_op_flag & KCQE_RAMROD_COMPLETION))
 956                         cnic_kwq_completion(dev, 1);
 957
 958                 while (j < num_cqes) {
 959                         u32 next_op = cp->completed_kcq[i + j]->kcqe_op_flag;
 960
 961                         if ((next_op & KCQE_FLAGS_LAYER_MASK) != kcqe_layer)
 962                                 break;
 963
 964                         if (unlikely(next_op & KCQE_RAMROD_COMPLETION))
 965                                 cnic_kwq_completion(dev, 1);
 966                         j++;
 967                 }
 968
 969                 if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_RDMA)
 970                         ulp_type = CNIC_ULP_RDMA;
 971                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_ISCSI)
 972                         ulp_type = CNIC_ULP_ISCSI;
 973                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L4)
 974                         ulp_type = CNIC_ULP_L4;
 975                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L2)
 976                         goto end;
 977                 else {
 978                         printk(KERN_ERR PFX "%s: Unknown type of KCQE(0x%x)\n",
 979                                dev->netdev->name, kcqe_op_flag);
 980                         goto end;
 981                 }
 982
 983                 rcu_read_lock();
 984                 ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
 985                 if (likely(ulp_ops)) {
 986                         ulp_ops->indicate_kcqes(cp->ulp_handle[ulp_type],
 987                                                   cp->completed_kcq + i, j);
 988                 }
 989                 rcu_read_unlock();
 990 end:
 991                 num_cqes -= j;
 992                 i += j;
 993                 j = 1;
 994         }
 995         return;
 996 }
 997
 998 static u16 cnic_bnx2_next_idx(u16 idx)
 999 {
1000         return idx + 1;
1001 }
1002
1003 static u16 cnic_bnx2_hw_idx(u16 idx)
1004 {
1005         return idx;
1006 }
1007
1008 static int cnic_get_kcqes(struct cnic_dev *dev, u16 hw_prod, u16 *sw_prod)
1009 {
1010         struct cnic_local *cp = dev->cnic_priv;
1011         u16 i, ri, last;
1012         struct kcqe *kcqe;
1013         int kcqe_cnt = 0, last_cnt = 0;
1014
1015         i = ri = last = *sw_prod;
1016         ri &= MAX_KCQ_IDX;
1017
1018         while ((i != hw_prod) && (kcqe_cnt < MAX_COMPLETED_KCQE)) {
1019                 kcqe = &cp->kcq[KCQ_PG(ri)][KCQ_IDX(ri)];
1020                 cp->completed_kcq[kcqe_cnt++] = kcqe;
1021                 i = cp->next_idx(i);
1022                 ri = i & MAX_KCQ_IDX;
1023                 if (likely(!(kcqe->kcqe_op_flag & KCQE_FLAGS_NEXT))) {
1024                         last_cnt = kcqe_cnt;
1025                         last = i;
1026                 }
1027         }
1028
1029         *sw_prod = last;
1030         return last_cnt;
1031 }
1032
1033 static void cnic_chk_pkt_rings(struct cnic_local *cp)
1034 {
1035         u16 rx_cons = *cp->rx_cons_ptr;
1036         u16 tx_cons = *cp->tx_cons_ptr;
1037
1038         if (cp->tx_cons != tx_cons || cp->rx_cons != rx_cons) {
1039                 cp->tx_cons = tx_cons;
1040                 cp->rx_cons = rx_cons;
1041                 uio_event_notify(cp->cnic_uinfo);
1042         }
1043 }
1044
1045 static int cnic_service_bnx2(void *data, void *status_blk)
1046 {
1047         struct cnic_dev *dev = data;
1048         struct status_block *sblk = status_blk;
1049         struct cnic_local *cp = dev->cnic_priv;
1050         u32 status_idx = sblk->status_idx;
1051         u16 hw_prod, sw_prod;
1052         int kcqe_cnt;
1053
1054         if (unlikely(!test_bit(CNIC_F_CNIC_UP, &dev->flags)))
1055                 return status_idx;
1056
1057         cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
1058
1059         hw_prod = sblk->status_completion_producer_index;
1060         sw_prod = cp->kcq_prod_idx;
1061         while (sw_prod != hw_prod) {
1062                 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
1063                 if (kcqe_cnt == 0)
1064                         goto done;
1065
1066                 service_kcqes(dev, kcqe_cnt);
1067
1068                 /* Tell compiler that status_blk fields can change. */
1069                 barrier();
1070                 if (status_idx != sblk->status_idx) {
1071                         status_idx = sblk->status_idx;
1072                         cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
1073                         hw_prod = sblk->status_completion_producer_index;
1074                 } else
1075                         break;
1076         }
1077
1078 done:
1079         CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
1080
1081         cp->kcq_prod_idx = sw_prod;
1082
1083         cnic_chk_pkt_rings(cp);
1084         return status_idx;
1085 }
1086
1087 static void cnic_service_bnx2_msix(unsigned long data)
1088 {
1089         struct cnic_dev *dev = (struct cnic_dev *) data;
1090         struct cnic_local *cp = dev->cnic_priv;
1091         struct status_block_msix *status_blk = cp->bnx2_status_blk;
1092         u32 status_idx = status_blk->status_idx;
1093         u16 hw_prod, sw_prod;
1094         int kcqe_cnt;
1095
1096         cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1097
1098         hw_prod = status_blk->status_completion_producer_index;
1099         sw_prod = cp->kcq_prod_idx;
1100         while (sw_prod != hw_prod) {
1101                 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
1102                 if (kcqe_cnt == 0)
1103                         goto done;
1104
1105                 service_kcqes(dev, kcqe_cnt);
1106
1107                 /* Tell compiler that status_blk fields can change. */
1108                 barrier();
1109                 if (status_idx != status_blk->status_idx) {
1110                         status_idx = status_blk->status_idx;
1111                         cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1112                         hw_prod = status_blk->status_completion_producer_index;
1113                 } else
1114                         break;
1115         }
1116
1117 done:
1118         CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
1119         cp->kcq_prod_idx = sw_prod;
1120
1121         cnic_chk_pkt_rings(cp);
1122
1123         cp->last_status_idx = status_idx;
1124         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
1125                 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
1126 }
1127
1128 static irqreturn_t cnic_irq(int irq, void *dev_instance)
1129 {
1130         struct cnic_dev *dev = dev_instance;
1131         struct cnic_local *cp = dev->cnic_priv;
1132         u16 prod = cp->kcq_prod_idx & MAX_KCQ_IDX;
1133
1134         if (cp->ack_int)
1135                 cp->ack_int(dev);
1136
1137         prefetch(cp->status_blk);
1138         prefetch(&cp->kcq[KCQ_PG(prod)][KCQ_IDX(prod)]);
1139
1140         if (likely(test_bit(CNIC_F_CNIC_UP, &dev->flags)))
1141                 tasklet_schedule(&cp->cnic_irq_task);
1142
1143         return IRQ_HANDLED;
1144 }
1145
1146 static void cnic_ulp_stop(struct cnic_dev *dev)
1147 {
1148         struct cnic_local *cp = dev->cnic_priv;
1149         int if_type;
1150
1151         if (cp->cnic_uinfo)
1152                 cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
1153
1154         for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
1155                 struct cnic_ulp_ops *ulp_ops;
1156
1157                 mutex_lock(&cnic_lock);
1158                 ulp_ops = cp->ulp_ops[if_type];
1159                 if (!ulp_ops) {
1160                         mutex_unlock(&cnic_lock);
1161                         continue;
1162                 }
1163                 set_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
1164                 mutex_unlock(&cnic_lock);
1165
1166                 if (test_and_clear_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1167                         ulp_ops->cnic_stop(cp->ulp_handle[if_type]);
1168
1169                 clear_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
1170         }
1171 }
1172
1173 static void cnic_ulp_start(struct cnic_dev *dev)
1174 {
1175         struct cnic_local *cp = dev->cnic_priv;
1176         int if_type;
1177
1178         for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
1179                 struct cnic_ulp_ops *ulp_ops;
1180
1181                 mutex_lock(&cnic_lock);
1182                 ulp_ops = cp->ulp_ops[if_type];
1183                 if (!ulp_ops || !ulp_ops->cnic_start) {
1184                         mutex_unlock(&cnic_lock);
1185                         continue;
1186                 }
1187                 set_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
1188                 mutex_unlock(&cnic_lock);
1189
1190                 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1191                         ulp_ops->cnic_start(cp->ulp_handle[if_type]);
1192
1193                 clear_bit(ULP_F_CALL_PENDING, &cp->ulp_flags[if_type]);
1194         }
1195 }
1196
1197 static int cnic_ctl(void *data, struct cnic_ctl_info *info)
1198 {
1199         struct cnic_dev *dev = data;
1200
1201         switch (info->cmd) {
1202         case CNIC_CTL_STOP_CMD:
1203                 cnic_hold(dev);
1204
1205                 cnic_ulp_stop(dev);
1206                 cnic_stop_hw(dev);
1207
1208                 cnic_put(dev);
1209                 break;
1210         case CNIC_CTL_START_CMD:
1211                 cnic_hold(dev);
1212
1213                 if (!cnic_start_hw(dev))
1214                         cnic_ulp_start(dev);
1215
1216                 cnic_put(dev);
1217                 break;
1218         default:
1219                 return -EINVAL;
1220         }
1221         return 0;
1222 }
1223
1224 static void cnic_ulp_init(struct cnic_dev *dev)
1225 {
1226         int i;
1227         struct cnic_local *cp = dev->cnic_priv;
1228
1229         for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1230                 struct cnic_ulp_ops *ulp_ops;
1231
1232                 mutex_lock(&cnic_lock);
1233                 ulp_ops = cnic_ulp_tbl[i];
1234                 if (!ulp_ops || !ulp_ops->cnic_init) {
1235                         mutex_unlock(&cnic_lock);
1236                         continue;
1237                 }
1238                 ulp_get(ulp_ops);
1239                 mutex_unlock(&cnic_lock);
1240
1241                 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1242                         ulp_ops->cnic_init(dev);
1243
1244                 ulp_put(ulp_ops);
1245         }
1246 }
1247
1248 static void cnic_ulp_exit(struct cnic_dev *dev)
1249 {
1250         int i;
1251         struct cnic_local *cp = dev->cnic_priv;
1252
1253         for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1254                 struct cnic_ulp_ops *ulp_ops;
1255
1256                 mutex_lock(&cnic_lock);
1257                 ulp_ops = cnic_ulp_tbl[i];
1258                 if (!ulp_ops || !ulp_ops->cnic_exit) {
1259                         mutex_unlock(&cnic_lock);
1260                         continue;
1261                 }
1262                 ulp_get(ulp_ops);
1263                 mutex_unlock(&cnic_lock);
1264
1265                 if (test_and_clear_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1266                         ulp_ops->cnic_exit(dev);
1267
1268                 ulp_put(ulp_ops);
1269         }
1270 }
1271
1272 static int cnic_cm_offload_pg(struct cnic_sock *csk)
1273 {
1274         struct cnic_dev *dev = csk->dev;
1275         struct l4_kwq_offload_pg *l4kwqe;
1276         struct kwqe *wqes[1];
1277
1278         l4kwqe = (struct l4_kwq_offload_pg *) &csk->kwqe1;
1279         memset(l4kwqe, 0, sizeof(*l4kwqe));
1280         wqes[0] = (struct kwqe *) l4kwqe;
1281
1282         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_OFFLOAD_PG;
1283         l4kwqe->flags =
1284                 L4_LAYER_CODE << L4_KWQ_OFFLOAD_PG_LAYER_CODE_SHIFT;
1285         l4kwqe->l2hdr_nbytes = ETH_HLEN;
1286
1287         l4kwqe->da0 = csk->ha[0];
1288         l4kwqe->da1 = csk->ha[1];
1289         l4kwqe->da2 = csk->ha[2];
1290         l4kwqe->da3 = csk->ha[3];
1291         l4kwqe->da4 = csk->ha[4];
1292         l4kwqe->da5 = csk->ha[5];
1293
1294         l4kwqe->sa0 = dev->mac_addr[0];
1295         l4kwqe->sa1 = dev->mac_addr[1];
1296         l4kwqe->sa2 = dev->mac_addr[2];
1297         l4kwqe->sa3 = dev->mac_addr[3];
1298         l4kwqe->sa4 = dev->mac_addr[4];
1299         l4kwqe->sa5 = dev->mac_addr[5];
1300
1301         l4kwqe->etype = ETH_P_IP;
1302         l4kwqe->ipid_count = DEF_IPID_COUNT;
1303         l4kwqe->host_opaque = csk->l5_cid;
1304
1305         if (csk->vlan_id) {
1306                 l4kwqe->pg_flags |= L4_KWQ_OFFLOAD_PG_VLAN_TAGGING;
1307                 l4kwqe->vlan_tag = csk->vlan_id;
1308                 l4kwqe->l2hdr_nbytes += 4;
1309         }
1310
1311         return dev->submit_kwqes(dev, wqes, 1);
1312 }
1313
1314 static int cnic_cm_update_pg(struct cnic_sock *csk)
1315 {
1316         struct cnic_dev *dev = csk->dev;
1317         struct l4_kwq_update_pg *l4kwqe;
1318         struct kwqe *wqes[1];
1319
1320         l4kwqe = (struct l4_kwq_update_pg *) &csk->kwqe1;
1321         memset(l4kwqe, 0, sizeof(*l4kwqe));
1322         wqes[0] = (struct kwqe *) l4kwqe;
1323
1324         l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPDATE_PG;
1325         l4kwqe->flags =
1326                 L4_LAYER_CODE << L4_KWQ_UPDATE_PG_LAYER_CODE_SHIFT;
1327         l4kwqe->pg_cid = csk->pg_cid;
1328
1329         l4kwqe->da0 = csk->ha[0];
1330         l4kwqe->da1 = csk->ha[1];
1331         l4kwqe->da2 = csk->ha[2];
1332         l4kwqe->da3 = csk->ha[3];
1333         l4kwqe->da4 = csk->ha[4];
1334         l4kwqe->da5 = csk->ha[5];
1335
1336         l4kwqe->pg_host_opaque = csk->l5_cid;
1337         l4kwqe->pg_valids = L4_KWQ_UPDATE_PG_VALIDS_DA;
1338
1339         return dev->submit_kwqes(dev, wqes, 1);
1340 }
1341
1342 static int cnic_cm_upload_pg(struct cnic_sock *csk)
1343 {
1344         struct cnic_dev *dev = csk->dev;
1345         struct l4_kwq_upload *l4kwqe;
1346         struct kwqe *wqes[1];
1347
1348         l4kwqe = (struct l4_kwq_upload *) &csk->kwqe1;
1349         memset(l4kwqe, 0, sizeof(*l4kwqe));
1350         wqes[0] = (struct kwqe *) l4kwqe;
1351
1352         l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPLOAD_PG;
1353         l4kwqe->flags =
1354                 L4_LAYER_CODE << L4_KWQ_UPLOAD_LAYER_CODE_SHIFT;
1355         l4kwqe->cid = csk->pg_cid;
1356
1357         return dev->submit_kwqes(dev, wqes, 1);
1358 }
1359
1360 static int cnic_cm_conn_req(struct cnic_sock *csk)
1361 {
1362         struct cnic_dev *dev = csk->dev;
1363         struct l4_kwq_connect_req1 *l4kwqe1;
1364         struct l4_kwq_connect_req2 *l4kwqe2;
1365         struct l4_kwq_connect_req3 *l4kwqe3;
1366         struct kwqe *wqes[3];
1367         u8 tcp_flags = 0;
1368         int num_wqes = 2;
1369
1370         l4kwqe1 = (struct l4_kwq_connect_req1 *) &csk->kwqe1;
1371         l4kwqe2 = (struct l4_kwq_connect_req2 *) &csk->kwqe2;
1372         l4kwqe3 = (struct l4_kwq_connect_req3 *) &csk->kwqe3;
1373         memset(l4kwqe1, 0, sizeof(*l4kwqe1));
1374         memset(l4kwqe2, 0, sizeof(*l4kwqe2));
1375         memset(l4kwqe3, 0, sizeof(*l4kwqe3));
1376
1377         l4kwqe3->op_code = L4_KWQE_OPCODE_VALUE_CONNECT3;
1378         l4kwqe3->flags =
1379                 L4_LAYER_CODE << L4_KWQ_CONNECT_REQ3_LAYER_CODE_SHIFT;
1380         l4kwqe3->ka_timeout = csk->ka_timeout;
1381         l4kwqe3->ka_interval = csk->ka_interval;
1382         l4kwqe3->ka_max_probe_count = csk->ka_max_probe_count;
1383         l4kwqe3->tos = csk->tos;
1384         l4kwqe3->ttl = csk->ttl;
1385         l4kwqe3->snd_seq_scale = csk->snd_seq_scale;
1386         l4kwqe3->pmtu = csk->mtu;
1387         l4kwqe3->rcv_buf = csk->rcv_buf;
1388         l4kwqe3->snd_buf = csk->snd_buf;
1389         l4kwqe3->seed = csk->seed;
1390
1391         wqes[0] = (struct kwqe *) l4kwqe1;
1392         if (test_bit(SK_F_IPV6, &csk->flags)) {
1393                 wqes[1] = (struct kwqe *) l4kwqe2;
1394                 wqes[2] = (struct kwqe *) l4kwqe3;
1395                 num_wqes = 3;
1396
1397                 l4kwqe1->conn_flags = L4_KWQ_CONNECT_REQ1_IP_V6;
1398                 l4kwqe2->op_code = L4_KWQE_OPCODE_VALUE_CONNECT2;
1399                 l4kwqe2->flags =
1400                         L4_KWQ_CONNECT_REQ2_LINKED_WITH_NEXT |
1401                         L4_LAYER_CODE << L4_KWQ_CONNECT_REQ2_LAYER_CODE_SHIFT;
1402                 l4kwqe2->src_ip_v6_2 = be32_to_cpu(csk->src_ip[1]);
1403                 l4kwqe2->src_ip_v6_3 = be32_to_cpu(csk->src_ip[2]);
1404                 l4kwqe2->src_ip_v6_4 = be32_to_cpu(csk->src_ip[3]);
1405                 l4kwqe2->dst_ip_v6_2 = be32_to_cpu(csk->dst_ip[1]);
1406                 l4kwqe2->dst_ip_v6_3 = be32_to_cpu(csk->dst_ip[2]);
1407                 l4kwqe2->dst_ip_v6_4 = be32_to_cpu(csk->dst_ip[3]);
1408                 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct ipv6hdr) -
1409                                sizeof(struct tcphdr);
1410         } else {
1411                 wqes[1] = (struct kwqe *) l4kwqe3;
1412                 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct iphdr) -
1413                                sizeof(struct tcphdr);
1414         }
1415
1416         l4kwqe1->op_code = L4_KWQE_OPCODE_VALUE_CONNECT1;
1417         l4kwqe1->flags =
1418                 (L4_LAYER_CODE << L4_KWQ_CONNECT_REQ1_LAYER_CODE_SHIFT) |
1419                  L4_KWQ_CONNECT_REQ3_LINKED_WITH_NEXT;
1420         l4kwqe1->cid = csk->cid;
1421         l4kwqe1->pg_cid = csk->pg_cid;
1422         l4kwqe1->src_ip = be32_to_cpu(csk->src_ip[0]);
1423         l4kwqe1->dst_ip = be32_to_cpu(csk->dst_ip[0]);
1424         l4kwqe1->src_port = be16_to_cpu(csk->src_port);
1425         l4kwqe1->dst_port = be16_to_cpu(csk->dst_port);
1426         if (csk->tcp_flags & SK_TCP_NO_DELAY_ACK)
1427                 tcp_flags |= L4_KWQ_CONNECT_REQ1_NO_DELAY_ACK;
1428         if (csk->tcp_flags & SK_TCP_KEEP_ALIVE)
1429                 tcp_flags |= L4_KWQ_CONNECT_REQ1_KEEP_ALIVE;
1430         if (csk->tcp_flags & SK_TCP_NAGLE)
1431                 tcp_flags |= L4_KWQ_CONNECT_REQ1_NAGLE_ENABLE;
1432         if (csk->tcp_flags & SK_TCP_TIMESTAMP)
1433                 tcp_flags |= L4_KWQ_CONNECT_REQ1_TIME_STAMP;
1434         if (csk->tcp_flags & SK_TCP_SACK)
1435                 tcp_flags |= L4_KWQ_CONNECT_REQ1_SACK;
1436         if (csk->tcp_flags & SK_TCP_SEG_SCALING)
1437                 tcp_flags |= L4_KWQ_CONNECT_REQ1_SEG_SCALING;
1438
1439         l4kwqe1->tcp_flags = tcp_flags;
1440
1441         return dev->submit_kwqes(dev, wqes, num_wqes);
1442 }
1443
1444 static int cnic_cm_close_req(struct cnic_sock *csk)
1445 {
1446         struct cnic_dev *dev = csk->dev;
1447         struct l4_kwq_close_req *l4kwqe;
1448         struct kwqe *wqes[1];
1449
1450         l4kwqe = (struct l4_kwq_close_req *) &csk->kwqe2;
1451         memset(l4kwqe, 0, sizeof(*l4kwqe));
1452         wqes[0] = (struct kwqe *) l4kwqe;
1453
1454         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_CLOSE;
1455         l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_CLOSE_REQ_LAYER_CODE_SHIFT;
1456         l4kwqe->cid = csk->cid;
1457
1458         return dev->submit_kwqes(dev, wqes, 1);
1459 }
1460
1461 static int cnic_cm_abort_req(struct cnic_sock *csk)
1462 {
1463         struct cnic_dev *dev = csk->dev;
1464         struct l4_kwq_reset_req *l4kwqe;
1465         struct kwqe *wqes[1];
1466
1467         l4kwqe = (struct l4_kwq_reset_req *) &csk->kwqe2;
1468         memset(l4kwqe, 0, sizeof(*l4kwqe));
1469         wqes[0] = (struct kwqe *) l4kwqe;
1470
1471         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_RESET;
1472         l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_RESET_REQ_LAYER_CODE_SHIFT;
1473         l4kwqe->cid = csk->cid;
1474
1475         return dev->submit_kwqes(dev, wqes, 1);
1476 }
1477
1478 static int cnic_cm_create(struct cnic_dev *dev, int ulp_type, u32 cid,
1479                           u32 l5_cid, struct cnic_sock **csk, void *context)
1480 {
1481         struct cnic_local *cp = dev->cnic_priv;
1482         struct cnic_sock *csk1;
1483
1484         if (l5_cid >= MAX_CM_SK_TBL_SZ)
1485                 return -EINVAL;
1486
1487         csk1 = &cp->csk_tbl[l5_cid];
1488         if (atomic_read(&csk1->ref_count))
1489                 return -EAGAIN;
1490
1491         if (test_and_set_bit(SK_F_INUSE, &csk1->flags))
1492                 return -EBUSY;
1493
1494         csk1->dev = dev;
1495         csk1->cid = cid;
1496         csk1->l5_cid = l5_cid;
1497         csk1->ulp_type = ulp_type;
1498         csk1->context = context;
1499
1500         csk1->ka_timeout = DEF_KA_TIMEOUT;
1501         csk1->ka_interval = DEF_KA_INTERVAL;
1502         csk1->ka_max_probe_count = DEF_KA_MAX_PROBE_COUNT;
1503         csk1->tos = DEF_TOS;
1504         csk1->ttl = DEF_TTL;
1505         csk1->snd_seq_scale = DEF_SND_SEQ_SCALE;
1506         csk1->rcv_buf = DEF_RCV_BUF;
1507         csk1->snd_buf = DEF_SND_BUF;
1508         csk1->seed = DEF_SEED;
1509
1510         *csk = csk1;
1511         return 0;
1512 }
1513
1514 static void cnic_cm_cleanup(struct cnic_sock *csk)
1515 {
1516         if (csk->src_port) {
1517                 struct cnic_dev *dev = csk->dev;
1518                 struct cnic_local *cp = dev->cnic_priv;
1519
1520                 cnic_free_id(&cp->csk_port_tbl, csk->src_port);
1521                 csk->src_port = 0;
1522         }
1523 }
1524
1525 static void cnic_close_conn(struct cnic_sock *csk)
1526 {
1527         if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags)) {
1528                 cnic_cm_upload_pg(csk);
1529                 clear_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1530         }
1531         cnic_cm_cleanup(csk);
1532 }
1533
1534 static int cnic_cm_destroy(struct cnic_sock *csk)
1535 {
1536         if (!cnic_in_use(csk))
1537                 return -EINVAL;
1538
1539         csk_hold(csk);
1540         clear_bit(SK_F_INUSE, &csk->flags);
1541         smp_mb__after_clear_bit();
1542         while (atomic_read(&csk->ref_count) != 1)
1543                 msleep(1);
1544         cnic_cm_cleanup(csk);
1545
1546         csk->flags = 0;
1547         csk_put(csk);
1548         return 0;
1549 }
1550
1551 static inline u16 cnic_get_vlan(struct net_device *dev,
1552                                 struct net_device **vlan_dev)
1553 {
1554         if (dev->priv_flags & IFF_802_1Q_VLAN) {
1555                 *vlan_dev = vlan_dev_real_dev(dev);
1556                 return vlan_dev_vlan_id(dev);
1557         }
1558         *vlan_dev = dev;
1559         return 0;
1560 }
1561
1562 static int cnic_get_v4_route(struct sockaddr_in *dst_addr,
1563                              struct dst_entry **dst)
1564 {
1565 #if defined(CONFIG_INET)
1566         struct flowi fl;
1567         int err;
1568         struct rtable *rt;
1569
1570         memset(&fl, 0, sizeof(fl));
1571         fl.nl_u.ip4_u.daddr = dst_addr->sin_addr.s_addr;
1572
1573         err = ip_route_output_key(&init_net, &rt, &fl);
1574         if (!err)
1575                 *dst = &rt->u.dst;
1576         return err;
1577 #else
1578         return -ENETUNREACH;
1579 #endif
1580 }
1581
1582 static int cnic_get_v6_route(struct sockaddr_in6 *dst_addr,
1583                              struct dst_entry **dst)
1584 {
1585 #if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
1586         struct flowi fl;
1587
1588         memset(&fl, 0, sizeof(fl));
1589         ipv6_addr_copy(&fl.fl6_dst, &dst_addr->sin6_addr);
1590         if (ipv6_addr_type(&fl.fl6_dst) & IPV6_ADDR_LINKLOCAL)
1591                 fl.oif = dst_addr->sin6_scope_id;
1592
1593         *dst = ip6_route_output(&init_net, NULL, &fl);
1594         if (*dst)
1595                 return 0;
1596 #endif
1597
1598         return -ENETUNREACH;
1599 }
1600
1601 static struct cnic_dev *cnic_cm_select_dev(struct sockaddr_in *dst_addr,
1602                                            int ulp_type)
1603 {
1604         struct cnic_dev *dev = NULL;
1605         struct dst_entry *dst;
1606         struct net_device *netdev = NULL;
1607         int err = -ENETUNREACH;
1608
1609         if (dst_addr->sin_family == AF_INET)
1610                 err = cnic_get_v4_route(dst_addr, &dst);
1611         else if (dst_addr->sin_family == AF_INET6) {
1612                 struct sockaddr_in6 *dst_addr6 =
1613                         (struct sockaddr_in6 *) dst_addr;
1614
1615                 err = cnic_get_v6_route(dst_addr6, &dst);
1616         } else
1617                 return NULL;
1618
1619         if (err)
1620                 return NULL;
1621
1622         if (!dst->dev)
1623                 goto done;
1624
1625         cnic_get_vlan(dst->dev, &netdev);
1626
1627         dev = cnic_from_netdev(netdev);
1628
1629 done:
1630         dst_release(dst);
1631         if (dev)
1632                 cnic_put(dev);
1633         return dev;
1634 }
1635
1636 static int cnic_resolve_addr(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1637 {
1638         struct cnic_dev *dev = csk->dev;
1639         struct cnic_local *cp = dev->cnic_priv;
1640
1641         return cnic_send_nlmsg(cp, ISCSI_KEVENT_PATH_REQ, csk);
1642 }
1643
1644 static int cnic_get_route(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1645 {
1646         struct cnic_dev *dev = csk->dev;
1647         struct cnic_local *cp = dev->cnic_priv;
1648         int is_v6, err, rc = -ENETUNREACH;
1649         struct dst_entry *dst;
1650         struct net_device *realdev;
1651         u32 local_port;
1652
1653         if (saddr->local.v6.sin6_family == AF_INET6 &&
1654             saddr->remote.v6.sin6_family == AF_INET6)
1655                 is_v6 = 1;
1656         else if (saddr->local.v4.sin_family == AF_INET &&
1657                  saddr->remote.v4.sin_family == AF_INET)
1658                 is_v6 = 0;
1659         else
1660                 return -EINVAL;
1661
1662         clear_bit(SK_F_IPV6, &csk->flags);
1663
1664         if (is_v6) {
1665 #if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
1666                 set_bit(SK_F_IPV6, &csk->flags);
1667                 err = cnic_get_v6_route(&saddr->remote.v6, &dst);
1668                 if (err)
1669                         return err;
1670
1671                 if (!dst || dst->error || !dst->dev)
1672                         goto err_out;
1673
1674                 memcpy(&csk->dst_ip[0], &saddr->remote.v6.sin6_addr,
1675                        sizeof(struct in6_addr));
1676                 csk->dst_port = saddr->remote.v6.sin6_port;
1677                 local_port = saddr->local.v6.sin6_port;
1678 #else
1679                 return rc;
1680 #endif
1681
1682         } else {
1683                 err = cnic_get_v4_route(&saddr->remote.v4, &dst);
1684                 if (err)
1685                         return err;
1686
1687                 if (!dst || dst->error || !dst->dev)
1688                         goto err_out;
1689
1690                 csk->dst_ip[0] = saddr->remote.v4.sin_addr.s_addr;
1691                 csk->dst_port = saddr->remote.v4.sin_port;
1692                 local_port = saddr->local.v4.sin_port;
1693         }
1694
1695         csk->vlan_id = cnic_get_vlan(dst->dev, &realdev);
1696         if (realdev != dev->netdev)
1697                 goto err_out;
1698
1699         if (local_port >= CNIC_LOCAL_PORT_MIN &&
1700             local_port < CNIC_LOCAL_PORT_MAX) {
1701                 if (cnic_alloc_id(&cp->csk_port_tbl, local_port))
1702                         local_port = 0;
1703         } else
1704                 local_port = 0;
1705
1706         if (!local_port) {
1707                 local_port = cnic_alloc_new_id(&cp->csk_port_tbl);
1708                 if (local_port == -1) {
1709                         rc = -ENOMEM;
1710                         goto err_out;
1711                 }
1712         }
1713         csk->src_port = local_port;
1714
1715         csk->mtu = dst_mtu(dst);
1716         rc = 0;
1717
1718 err_out:
1719         dst_release(dst);
1720         return rc;
1721 }
1722
1723 static void cnic_init_csk_state(struct cnic_sock *csk)
1724 {
1725         csk->state = 0;
1726         clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1727         clear_bit(SK_F_CLOSING, &csk->flags);
1728 }
1729
1730 static int cnic_cm_connect(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1731 {
1732         int err = 0;
1733
1734         if (!cnic_in_use(csk))
1735                 return -EINVAL;
1736
1737         if (test_and_set_bit(SK_F_CONNECT_START, &csk->flags))
1738                 return -EINVAL;
1739
1740         cnic_init_csk_state(csk);
1741
1742         err = cnic_get_route(csk, saddr);
1743         if (err)
1744                 goto err_out;
1745
1746         err = cnic_resolve_addr(csk, saddr);
1747         if (!err)
1748                 return 0;
1749
1750 err_out:
1751         clear_bit(SK_F_CONNECT_START, &csk->flags);
1752         return err;
1753 }
1754
1755 static int cnic_cm_abort(struct cnic_sock *csk)
1756 {
1757         struct cnic_local *cp = csk->dev->cnic_priv;
1758         u32 opcode;
1759
1760         if (!cnic_in_use(csk))
1761                 return -EINVAL;
1762
1763         if (cnic_abort_prep(csk))
1764                 return cnic_cm_abort_req(csk);
1765
1766         /* Getting here means that we haven't started connect, or
1767          * connect was not successful.
1768          */
1769
1770         csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
1771         if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1772                 opcode = csk->state;
1773         else
1774                 opcode = L5CM_RAMROD_CMD_ID_TERMINATE_OFFLOAD;
1775         cp->close_conn(csk, opcode);
1776
1777         return 0;
1778 }
1779
1780 static int cnic_cm_close(struct cnic_sock *csk)
1781 {
1782         if (!cnic_in_use(csk))
1783                 return -EINVAL;
1784
1785         if (cnic_close_prep(csk)) {
1786                 csk->state = L4_KCQE_OPCODE_VALUE_CLOSE_COMP;
1787                 return cnic_cm_close_req(csk);
1788         }
1789         return 0;
1790 }
1791
1792 static void cnic_cm_upcall(struct cnic_local *cp, struct cnic_sock *csk,
1793                            u8 opcode)
1794 {
1795         struct cnic_ulp_ops *ulp_ops;
1796         int ulp_type = csk->ulp_type;
1797
1798         rcu_read_lock();
1799         ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
1800         if (ulp_ops) {
1801                 if (opcode == L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE)
1802                         ulp_ops->cm_connect_complete(csk);
1803                 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)
1804                         ulp_ops->cm_close_complete(csk);
1805                 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED)
1806                         ulp_ops->cm_remote_abort(csk);
1807                 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_COMP)
1808                         ulp_ops->cm_abort_complete(csk);
1809                 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED)
1810                         ulp_ops->cm_remote_close(csk);
1811         }
1812         rcu_read_unlock();
1813 }
1814
1815 static int cnic_cm_set_pg(struct cnic_sock *csk)
1816 {
1817         if (cnic_offld_prep(csk)) {
1818                 if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1819                         cnic_cm_update_pg(csk);
1820                 else
1821                         cnic_cm_offload_pg(csk);
1822         }
1823         return 0;
1824 }
1825
1826 static void cnic_cm_process_offld_pg(struct cnic_dev *dev, struct l4_kcq *kcqe)
1827 {
1828         struct cnic_local *cp = dev->cnic_priv;
1829         u32 l5_cid = kcqe->pg_host_opaque;
1830         u8 opcode = kcqe->op_code;
1831         struct cnic_sock *csk = &cp->csk_tbl[l5_cid];
1832
1833         csk_hold(csk);
1834         if (!cnic_in_use(csk))
1835                 goto done;
1836
1837         if (opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1838                 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1839                 goto done;
1840         }
1841         csk->pg_cid = kcqe->pg_cid;
1842         set_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1843         cnic_cm_conn_req(csk);
1844
1845 done:
1846         csk_put(csk);
1847 }
1848
1849 static void cnic_cm_process_kcqe(struct cnic_dev *dev, struct kcqe *kcqe)
1850 {
1851         struct cnic_local *cp = dev->cnic_priv;
1852         struct l4_kcq *l4kcqe = (struct l4_kcq *) kcqe;
1853         u8 opcode = l4kcqe->op_code;
1854         u32 l5_cid;
1855         struct cnic_sock *csk;
1856
1857         if (opcode == L4_KCQE_OPCODE_VALUE_OFFLOAD_PG ||
1858             opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1859                 cnic_cm_process_offld_pg(dev, l4kcqe);
1860                 return;
1861         }
1862
1863         l5_cid = l4kcqe->conn_id;
1864         if (opcode & 0x80)
1865                 l5_cid = l4kcqe->cid;
1866         if (l5_cid >= MAX_CM_SK_TBL_SZ)
1867                 return;
1868
1869         csk = &cp->csk_tbl[l5_cid];
1870         csk_hold(csk);
1871
1872         if (!cnic_in_use(csk)) {
1873                 csk_put(csk);
1874                 return;
1875         }
1876
1877         switch (opcode) {
1878         case L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE:
1879                 if (l4kcqe->status == 0)
1880                         set_bit(SK_F_OFFLD_COMPLETE, &csk->flags);
1881
1882                 smp_mb__before_clear_bit();
1883                 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1884                 cnic_cm_upcall(cp, csk, opcode);
1885                 break;
1886
1887         case L4_KCQE_OPCODE_VALUE_RESET_RECEIVED:
1888                 if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags))
1889                         csk->state = opcode;
1890                 /* fall through */
1891         case L4_KCQE_OPCODE_VALUE_CLOSE_COMP:
1892         case L4_KCQE_OPCODE_VALUE_RESET_COMP:
1893                 cp->close_conn(csk, opcode);
1894                 break;
1895
1896         case L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED:
1897                 cnic_cm_upcall(cp, csk, opcode);
1898                 break;
1899         }
1900         csk_put(csk);
1901 }
1902
1903 static void cnic_cm_indicate_kcqe(void *data, struct kcqe *kcqe[], u32 num)
1904 {
1905         struct cnic_dev *dev = data;
1906         int i;
1907
1908         for (i = 0; i < num; i++)
1909                 cnic_cm_process_kcqe(dev, kcqe[i]);
1910 }
1911
1912 static struct cnic_ulp_ops cm_ulp_ops = {
1913         .indicate_kcqes         = cnic_cm_indicate_kcqe,
1914 };
1915
1916 static void cnic_cm_free_mem(struct cnic_dev *dev)
1917 {
1918         struct cnic_local *cp = dev->cnic_priv;
1919
1920         kfree(cp->csk_tbl);
1921         cp->csk_tbl = NULL;
1922         cnic_free_id_tbl(&cp->csk_port_tbl);
1923 }
1924
1925 static int cnic_cm_alloc_mem(struct cnic_dev *dev)
1926 {
1927         struct cnic_local *cp = dev->cnic_priv;
1928
1929         cp->csk_tbl = kzalloc(sizeof(struct cnic_sock) * MAX_CM_SK_TBL_SZ,
1930                               GFP_KERNEL);
1931         if (!cp->csk_tbl)
1932                 return -ENOMEM;
1933
1934         if (cnic_init_id_tbl(&cp->csk_port_tbl, CNIC_LOCAL_PORT_RANGE,
1935                              CNIC_LOCAL_PORT_MIN)) {
1936                 cnic_cm_free_mem(dev);
1937                 return -ENOMEM;
1938         }
1939         return 0;
1940 }
1941
1942 static int cnic_ready_to_close(struct cnic_sock *csk, u32 opcode)
1943 {
1944         if ((opcode == csk->state) ||
1945             (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED &&
1946              csk->state == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)) {
1947                 if (!test_and_set_bit(SK_F_CLOSING, &csk->flags))
1948                         return 1;
1949         }
1950         return 0;
1951 }
1952
1953 static void cnic_close_bnx2_conn(struct cnic_sock *csk, u32 opcode)
1954 {
1955         struct cnic_dev *dev = csk->dev;
1956         struct cnic_local *cp = dev->cnic_priv;
1957
1958         clear_bit(SK_F_CONNECT_START, &csk->flags);
1959         if (cnic_ready_to_close(csk, opcode)) {
1960                 cnic_close_conn(csk);
1961                 cnic_cm_upcall(cp, csk, opcode);
1962         }
1963 }
1964
1965 static void cnic_cm_stop_bnx2_hw(struct cnic_dev *dev)
1966 {
1967 }
1968
1969 static int cnic_cm_init_bnx2_hw(struct cnic_dev *dev)
1970 {
1971         u32 seed;
1972
1973         get_random_bytes(&seed, 4);
1974         cnic_ctx_wr(dev, 45, 0, seed);
1975         return 0;
1976 }
1977
1978 static int cnic_cm_open(struct cnic_dev *dev)
1979 {
1980         struct cnic_local *cp = dev->cnic_priv;
1981         int err;
1982
1983         err = cnic_cm_alloc_mem(dev);
1984         if (err)
1985                 return err;
1986
1987         err = cp->start_cm(dev);
1988
1989         if (err)
1990                 goto err_out;
1991
1992         dev->cm_create = cnic_cm_create;
1993         dev->cm_destroy = cnic_cm_destroy;
1994         dev->cm_connect = cnic_cm_connect;
1995         dev->cm_abort = cnic_cm_abort;
1996         dev->cm_close = cnic_cm_close;
1997         dev->cm_select_dev = cnic_cm_select_dev;
1998
1999         cp->ulp_handle[CNIC_ULP_L4] = dev;
2000         rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], &cm_ulp_ops);
2001         return 0;
2002
2003 err_out:
2004         cnic_cm_free_mem(dev);
2005         return err;
2006 }
2007
2008 static int cnic_cm_shutdown(struct cnic_dev *dev)
2009 {
2010         struct cnic_local *cp = dev->cnic_priv;
2011         int i;
2012
2013         cp->stop_cm(dev);
2014
2015         if (!cp->csk_tbl)
2016                 return 0;
2017
2018         for (i = 0; i < MAX_CM_SK_TBL_SZ; i++) {
2019                 struct cnic_sock *csk = &cp->csk_tbl[i];
2020
2021                 clear_bit(SK_F_INUSE, &csk->flags);
2022                 cnic_cm_cleanup(csk);
2023         }
2024         cnic_cm_free_mem(dev);
2025
2026         return 0;
2027 }
2028
2029 static void cnic_init_context(struct cnic_dev *dev, u32 cid)
2030 {
2031         struct cnic_local *cp = dev->cnic_priv;
2032         u32 cid_addr;
2033         int i;
2034
2035         if (CHIP_NUM(cp) == CHIP_NUM_5709)
2036                 return;
2037
2038         cid_addr = GET_CID_ADDR(cid);
2039
2040         for (i = 0; i < CTX_SIZE; i += 4)
2041                 cnic_ctx_wr(dev, cid_addr, i, 0);
2042 }
2043
2044 static int cnic_setup_5709_context(struct cnic_dev *dev, int valid)
2045 {
2046         struct cnic_local *cp = dev->cnic_priv;
2047         int ret = 0, i;
2048         u32 valid_bit = valid ? BNX2_CTX_HOST_PAGE_TBL_DATA0_VALID : 0;
2049
2050         if (CHIP_NUM(cp) != CHIP_NUM_5709)
2051                 return 0;
2052
2053         for (i = 0; i < cp->ctx_blks; i++) {
2054                 int j;
2055                 u32 idx = cp->ctx_arr[i].cid / cp->cids_per_blk;
2056                 u32 val;
2057
2058                 memset(cp->ctx_arr[i].ctx, 0, BCM_PAGE_SIZE);
2059
2060                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA0,
2061                         (cp->ctx_arr[i].mapping & 0xffffffff) | valid_bit);
2062                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA1,
2063                         (u64) cp->ctx_arr[i].mapping >> 32);
2064                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL, idx |
2065                         BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ);
2066                 for (j = 0; j < 10; j++) {
2067
2068                         val = CNIC_RD(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL);
2069                         if (!(val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ))
2070                                 break;
2071                         udelay(5);
2072                 }
2073                 if (val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ) {
2074                         ret = -EBUSY;
2075                         break;
2076                 }
2077         }
2078         return ret;
2079 }
2080
2081 static void cnic_free_irq(struct cnic_dev *dev)
2082 {
2083         struct cnic_local *cp = dev->cnic_priv;
2084         struct cnic_eth_dev *ethdev = cp->ethdev;
2085
2086         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2087                 cp->disable_int_sync(dev);
2088                 tasklet_disable(&cp->cnic_irq_task);
2089                 free_irq(ethdev->irq_arr[0].vector, dev);
2090         }
2091 }
2092
2093 static int cnic_init_bnx2_irq(struct cnic_dev *dev)
2094 {
2095         struct cnic_local *cp = dev->cnic_priv;
2096         struct cnic_eth_dev *ethdev = cp->ethdev;
2097
2098         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2099                 int err, i = 0;
2100                 int sblk_num = cp->status_blk_num;
2101                 u32 base = ((sblk_num - 1) * BNX2_HC_SB_CONFIG_SIZE) +
2102                            BNX2_HC_SB_CONFIG_1;
2103
2104                 CNIC_WR(dev, base, BNX2_HC_SB_CONFIG_1_ONE_SHOT);
2105
2106                 CNIC_WR(dev, base + BNX2_HC_COMP_PROD_TRIP_OFF, (2 << 16) | 8);
2107                 CNIC_WR(dev, base + BNX2_HC_COM_TICKS_OFF, (64 << 16) | 220);
2108                 CNIC_WR(dev, base + BNX2_HC_CMD_TICKS_OFF, (64 << 16) | 220);
2109
2110                 cp->bnx2_status_blk = cp->status_blk;
2111                 cp->last_status_idx = cp->bnx2_status_blk->status_idx;
2112                 tasklet_init(&cp->cnic_irq_task, &cnic_service_bnx2_msix,
2113                              (unsigned long) dev);
2114                 err = request_irq(ethdev->irq_arr[0].vector, cnic_irq, 0,
2115                                   "cnic", dev);
2116                 if (err) {
2117                         tasklet_disable(&cp->cnic_irq_task);
2118                         return err;
2119                 }
2120                 while (cp->bnx2_status_blk->status_completion_producer_index &&
2121                        i < 10) {
2122                         CNIC_WR(dev, BNX2_HC_COALESCE_NOW,
2123                                 1 << (11 + sblk_num));
2124                         udelay(10);
2125                         i++;
2126                         barrier();
2127                 }
2128                 if (cp->bnx2_status_blk->status_completion_producer_index) {
2129                         cnic_free_irq(dev);
2130                         goto failed;
2131                 }
2132
2133         } else {
2134                 struct status_block *sblk = cp->status_blk;
2135                 u32 hc_cmd = CNIC_RD(dev, BNX2_HC_COMMAND);
2136                 int i = 0;
2137
2138                 while (sblk->status_completion_producer_index && i < 10) {
2139                         CNIC_WR(dev, BNX2_HC_COMMAND,
2140                                 hc_cmd | BNX2_HC_COMMAND_COAL_NOW_WO_INT);
2141                         udelay(10);
2142                         i++;
2143                         barrier();
2144                 }
2145                 if (sblk->status_completion_producer_index)
2146                         goto failed;
2147
2148         }
2149         return 0;
2150
2151 failed:
2152         printk(KERN_ERR PFX "%s: " "KCQ index not resetting to 0.\n",
2153                dev->netdev->name);
2154         return -EBUSY;
2155 }
2156
2157 static void cnic_enable_bnx2_int(struct cnic_dev *dev)
2158 {
2159         struct cnic_local *cp = dev->cnic_priv;
2160         struct cnic_eth_dev *ethdev = cp->ethdev;
2161
2162         if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
2163                 return;
2164
2165         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2166                 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
2167 }
2168
2169 static void cnic_disable_bnx2_int_sync(struct cnic_dev *dev)
2170 {
2171         struct cnic_local *cp = dev->cnic_priv;
2172         struct cnic_eth_dev *ethdev = cp->ethdev;
2173
2174         if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
2175                 return;
2176
2177         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2178                 BNX2_PCICFG_INT_ACK_CMD_MASK_INT);
2179         CNIC_RD(dev, BNX2_PCICFG_INT_ACK_CMD);
2180         synchronize_irq(ethdev->irq_arr[0].vector);
2181 }
2182
2183 static void cnic_init_bnx2_tx_ring(struct cnic_dev *dev)
2184 {
2185         struct cnic_local *cp = dev->cnic_priv;
2186         struct cnic_eth_dev *ethdev = cp->ethdev;
2187         u32 cid_addr, tx_cid, sb_id;
2188         u32 val, offset0, offset1, offset2, offset3;
2189         int i;
2190         struct tx_bd *txbd;
2191         dma_addr_t buf_map;
2192         struct status_block *s_blk = cp->status_blk;
2193
2194         sb_id = cp->status_blk_num;
2195         tx_cid = 20;
2196         cnic_init_context(dev, tx_cid);
2197         cnic_init_context(dev, tx_cid + 1);
2198         cp->tx_cons_ptr = &s_blk->status_tx_quick_consumer_index2;
2199         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2200                 struct status_block_msix *sblk = cp->status_blk;
2201
2202                 tx_cid = TX_TSS_CID + sb_id - 1;
2203                 cnic_init_context(dev, tx_cid);
2204                 CNIC_WR(dev, BNX2_TSCH_TSS_CFG, (sb_id << 24) |
2205                         (TX_TSS_CID << 7));
2206                 cp->tx_cons_ptr = &sblk->status_tx_quick_consumer_index;
2207         }
2208         cp->tx_cons = *cp->tx_cons_ptr;
2209
2210         cid_addr = GET_CID_ADDR(tx_cid);
2211         if (CHIP_NUM(cp) == CHIP_NUM_5709) {
2212                 u32 cid_addr2 = GET_CID_ADDR(tx_cid + 4) + 0x40;
2213
2214                 for (i = 0; i < PHY_CTX_SIZE; i += 4)
2215                         cnic_ctx_wr(dev, cid_addr2, i, 0);
2216
2217                 offset0 = BNX2_L2CTX_TYPE_XI;
2218                 offset1 = BNX2_L2CTX_CMD_TYPE_XI;
2219                 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI_XI;
2220                 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO_XI;
2221         } else {
2222                 offset0 = BNX2_L2CTX_TYPE;
2223                 offset1 = BNX2_L2CTX_CMD_TYPE;
2224                 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI;
2225                 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO;
2226         }
2227         val = BNX2_L2CTX_TYPE_TYPE_L2 | BNX2_L2CTX_TYPE_SIZE_L2;
2228         cnic_ctx_wr(dev, cid_addr, offset0, val);
2229
2230         val = BNX2_L2CTX_CMD_TYPE_TYPE_L2 | (8 << 16);
2231         cnic_ctx_wr(dev, cid_addr, offset1, val);
2232
2233         txbd = (struct tx_bd *) cp->l2_ring;
2234
2235         buf_map = cp->l2_buf_map;
2236         for (i = 0; i < MAX_TX_DESC_CNT; i++, txbd++) {
2237                 txbd->tx_bd_haddr_hi = (u64) buf_map >> 32;
2238                 txbd->tx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2239         }
2240         val = (u64) cp->l2_ring_map >> 32;
2241         cnic_ctx_wr(dev, cid_addr, offset2, val);
2242         txbd->tx_bd_haddr_hi = val;
2243
2244         val = (u64) cp->l2_ring_map & 0xffffffff;
2245         cnic_ctx_wr(dev, cid_addr, offset3, val);
2246         txbd->tx_bd_haddr_lo = val;
2247 }
2248
2249 static void cnic_init_bnx2_rx_ring(struct cnic_dev *dev)
2250 {
2251         struct cnic_local *cp = dev->cnic_priv;
2252         struct cnic_eth_dev *ethdev = cp->ethdev;
2253         u32 cid_addr, sb_id, val, coal_reg, coal_val;
2254         int i;
2255         struct rx_bd *rxbd;
2256         struct status_block *s_blk = cp->status_blk;
2257
2258         sb_id = cp->status_blk_num;
2259         cnic_init_context(dev, 2);
2260         cp->rx_cons_ptr = &s_blk->status_rx_quick_consumer_index2;
2261         coal_reg = BNX2_HC_COMMAND;
2262         coal_val = CNIC_RD(dev, coal_reg);
2263         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2264                 struct status_block_msix *sblk = cp->status_blk;
2265
2266                 cp->rx_cons_ptr = &sblk->status_rx_quick_consumer_index;
2267                 coal_reg = BNX2_HC_COALESCE_NOW;
2268                 coal_val = 1 << (11 + sb_id);
2269         }
2270         i = 0;
2271         while (!(*cp->rx_cons_ptr != 0) && i < 10) {
2272                 CNIC_WR(dev, coal_reg, coal_val);
2273                 udelay(10);
2274                 i++;
2275                 barrier();
2276         }
2277         cp->rx_cons = *cp->rx_cons_ptr;
2278
2279         cid_addr = GET_CID_ADDR(2);
2280         val = BNX2_L2CTX_CTX_TYPE_CTX_BD_CHN_TYPE_VALUE |
2281               BNX2_L2CTX_CTX_TYPE_SIZE_L2 | (0x02 << 8);
2282         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_CTX_TYPE, val);
2283
2284         if (sb_id == 0)
2285                 val = 2 << BNX2_L2CTX_STATUSB_NUM_SHIFT;
2286         else
2287                 val = BNX2_L2CTX_STATUSB_NUM(sb_id);
2288         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_HOST_BDIDX, val);
2289
2290         rxbd = (struct rx_bd *) (cp->l2_ring + BCM_PAGE_SIZE);
2291         for (i = 0; i < MAX_RX_DESC_CNT; i++, rxbd++) {
2292                 dma_addr_t buf_map;
2293                 int n = (i % cp->l2_rx_ring_size) + 1;
2294
2295                 buf_map = cp->l2_buf_map + (n * cp->l2_single_buf_size);
2296                 rxbd->rx_bd_len = cp->l2_single_buf_size;
2297                 rxbd->rx_bd_flags = RX_BD_FLAGS_START | RX_BD_FLAGS_END;
2298                 rxbd->rx_bd_haddr_hi = (u64) buf_map >> 32;
2299                 rxbd->rx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2300         }
2301         val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) >> 32;
2302         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_HI, val);
2303         rxbd->rx_bd_haddr_hi = val;
2304
2305         val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) & 0xffffffff;
2306         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_LO, val);
2307         rxbd->rx_bd_haddr_lo = val;
2308
2309         val = cnic_reg_rd_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD);
2310         cnic_reg_wr_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD, val | (1 << 2));
2311 }
2312
2313 static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *dev)
2314 {
2315         struct kwqe *wqes[1], l2kwqe;
2316
2317         memset(&l2kwqe, 0, sizeof(l2kwqe));
2318         wqes[0] = &l2kwqe;
2319         l2kwqe.kwqe_op_flag = (L2_LAYER_CODE << KWQE_FLAGS_LAYER_SHIFT) |
2320                               (L2_KWQE_OPCODE_VALUE_FLUSH <<
2321                                KWQE_OPCODE_SHIFT) | 2;
2322         dev->submit_kwqes(dev, wqes, 1);
2323 }
2324
2325 static void cnic_set_bnx2_mac(struct cnic_dev *dev)
2326 {
2327         struct cnic_local *cp = dev->cnic_priv;
2328         u32 val;
2329
2330         val = cp->func << 2;
2331
2332         cp->shmem_base = cnic_reg_rd_ind(dev, BNX2_SHM_HDR_ADDR_0 + val);
2333
2334         val = cnic_reg_rd_ind(dev, cp->shmem_base +
2335                               BNX2_PORT_HW_CFG_ISCSI_MAC_UPPER);
2336         dev->mac_addr[0] = (u8) (val >> 8);
2337         dev->mac_addr[1] = (u8) val;
2338
2339         CNIC_WR(dev, BNX2_EMAC_MAC_MATCH4, val);
2340
2341         val = cnic_reg_rd_ind(dev, cp->shmem_base +
2342                               BNX2_PORT_HW_CFG_ISCSI_MAC_LOWER);
2343         dev->mac_addr[2] = (u8) (val >> 24);
2344         dev->mac_addr[3] = (u8) (val >> 16);
2345         dev->mac_addr[4] = (u8) (val >> 8);
2346         dev->mac_addr[5] = (u8) val;
2347
2348         CNIC_WR(dev, BNX2_EMAC_MAC_MATCH5, val);
2349
2350         val = 4 | BNX2_RPM_SORT_USER2_BC_EN;
2351         if (CHIP_NUM(cp) != CHIP_NUM_5709)
2352                 val |= BNX2_RPM_SORT_USER2_PROM_VLAN;
2353
2354         CNIC_WR(dev, BNX2_RPM_SORT_USER2, 0x0);
2355         CNIC_WR(dev, BNX2_RPM_SORT_USER2, val);
2356         CNIC_WR(dev, BNX2_RPM_SORT_USER2, val | BNX2_RPM_SORT_USER2_ENA);
2357 }
2358
2359 static int cnic_start_bnx2_hw(struct cnic_dev *dev)
2360 {
2361         struct cnic_local *cp = dev->cnic_priv;
2362         struct cnic_eth_dev *ethdev = cp->ethdev;
2363         struct status_block *sblk = cp->status_blk;
2364         u32 val;
2365         int err;
2366
2367         cnic_set_bnx2_mac(dev);
2368
2369         val = CNIC_RD(dev, BNX2_MQ_CONFIG);
2370         val &= ~BNX2_MQ_CONFIG_KNL_BYP_BLK_SIZE;
2371         if (BCM_PAGE_BITS > 12)
2372                 val |= (12 - 8)  << 4;
2373         else
2374                 val |= (BCM_PAGE_BITS - 8)  << 4;
2375
2376         CNIC_WR(dev, BNX2_MQ_CONFIG, val);
2377
2378         CNIC_WR(dev, BNX2_HC_COMP_PROD_TRIP, (2 << 16) | 8);
2379         CNIC_WR(dev, BNX2_HC_COM_TICKS, (64 << 16) | 220);
2380         CNIC_WR(dev, BNX2_HC_CMD_TICKS, (64 << 16) | 220);
2381
2382         err = cnic_setup_5709_context(dev, 1);
2383         if (err)
2384                 return err;
2385
2386         cnic_init_context(dev, KWQ_CID);
2387         cnic_init_context(dev, KCQ_CID);
2388
2389         cp->kwq_cid_addr = GET_CID_ADDR(KWQ_CID);
2390         cp->kwq_io_addr = MB_GET_CID_ADDR(KWQ_CID) + L5_KRNLQ_HOST_QIDX;
2391
2392         cp->max_kwq_idx = MAX_KWQ_IDX;
2393         cp->kwq_prod_idx = 0;
2394         cp->kwq_con_idx = 0;
2395         cp->cnic_local_flags |= CNIC_LCL_FL_KWQ_INIT;
2396
2397         if (CHIP_NUM(cp) == CHIP_NUM_5706 || CHIP_NUM(cp) == CHIP_NUM_5708)
2398                 cp->kwq_con_idx_ptr = &sblk->status_rx_quick_consumer_index15;
2399         else
2400                 cp->kwq_con_idx_ptr = &sblk->status_cmd_consumer_index;
2401
2402         /* Initialize the kernel work queue context. */
2403         val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2404               (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2405         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_TYPE, val);
2406
2407         val = (BCM_PAGE_SIZE / sizeof(struct kwqe) - 1) << 16;
2408         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2409
2410         val = ((BCM_PAGE_SIZE / sizeof(struct kwqe)) << 16) | KWQ_PAGE_CNT;
2411         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2412
2413         val = (u32) ((u64) cp->kwq_info.pgtbl_map >> 32);
2414         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2415
2416         val = (u32) cp->kwq_info.pgtbl_map;
2417         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2418
2419         cp->kcq_cid_addr = GET_CID_ADDR(KCQ_CID);
2420         cp->kcq_io_addr = MB_GET_CID_ADDR(KCQ_CID) + L5_KRNLQ_HOST_QIDX;
2421
2422         cp->kcq_prod_idx = 0;
2423
2424         /* Initialize the kernel complete queue context. */
2425         val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2426               (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2427         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_TYPE, val);
2428
2429         val = (BCM_PAGE_SIZE / sizeof(struct kcqe) - 1) << 16;
2430         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2431
2432         val = ((BCM_PAGE_SIZE / sizeof(struct kcqe)) << 16) | KCQ_PAGE_CNT;
2433         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2434
2435         val = (u32) ((u64) cp->kcq_info.pgtbl_map >> 32);
2436         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2437
2438         val = (u32) cp->kcq_info.pgtbl_map;
2439         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2440
2441         cp->int_num = 0;
2442         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2443                 u32 sb_id = cp->status_blk_num;
2444                 u32 sb = BNX2_L2CTX_STATUSB_NUM(sb_id);
2445
2446                 cp->int_num = sb_id << BNX2_PCICFG_INT_ACK_CMD_INT_NUM_SHIFT;
2447                 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2448                 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2449         }
2450
2451         /* Enable Commnad Scheduler notification when we write to the
2452          * host producer index of the kernel contexts. */
2453         CNIC_WR(dev, BNX2_MQ_KNL_CMD_MASK1, 2);
2454
2455         /* Enable Command Scheduler notification when we write to either
2456          * the Send Queue or Receive Queue producer indexes of the kernel
2457          * bypass contexts. */
2458         CNIC_WR(dev, BNX2_MQ_KNL_BYP_CMD_MASK1, 7);
2459         CNIC_WR(dev, BNX2_MQ_KNL_BYP_WRITE_MASK1, 7);
2460
2461         /* Notify COM when the driver post an application buffer. */
2462         CNIC_WR(dev, BNX2_MQ_KNL_RX_V2P_MASK2, 0x2000);
2463
2464         /* Set the CP and COM doorbells.  These two processors polls the
2465          * doorbell for a non zero value before running.  This must be done
2466          * after setting up the kernel queue contexts. */
2467         cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 1);
2468         cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 1);
2469
2470         cnic_init_bnx2_tx_ring(dev);
2471         cnic_init_bnx2_rx_ring(dev);
2472
2473         err = cnic_init_bnx2_irq(dev);
2474         if (err) {
2475                 printk(KERN_ERR PFX "%s: cnic_init_irq failed\n",
2476                        dev->netdev->name);
2477                 cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2478                 cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2479                 return err;
2480         }
2481
2482         return 0;
2483 }
2484
2485 static void cnic_init_rings(struct cnic_dev *dev)
2486 {
2487         if (test_bit(CNIC_F_BNX2_CLASS, &dev->flags)) {
2488                 cnic_init_bnx2_tx_ring(dev);
2489                 cnic_init_bnx2_rx_ring(dev);
2490         }
2491 }
2492
2493 static void cnic_shutdown_rings(struct cnic_dev *dev)
2494 {
2495         if (test_bit(CNIC_F_BNX2_CLASS, &dev->flags)) {
2496                 cnic_shutdown_bnx2_rx_ring(dev);
2497         }
2498 }
2499
2500 static int cnic_register_netdev(struct cnic_dev *dev)
2501 {
2502         struct cnic_local *cp = dev->cnic_priv;
2503         struct cnic_eth_dev *ethdev = cp->ethdev;
2504         int err;
2505
2506         if (!ethdev)
2507                 return -ENODEV;
2508
2509         if (ethdev->drv_state & CNIC_DRV_STATE_REGD)
2510                 return 0;
2511
2512         err = ethdev->drv_register_cnic(dev->netdev, cp->cnic_ops, dev);
2513         if (err)
2514                 printk(KERN_ERR PFX "%s: register_cnic failed\n",
2515                        dev->netdev->name);
2516
2517         return err;
2518 }
2519
2520 static void cnic_unregister_netdev(struct cnic_dev *dev)
2521 {
2522         struct cnic_local *cp = dev->cnic_priv;
2523         struct cnic_eth_dev *ethdev = cp->ethdev;
2524
2525         if (!ethdev)
2526                 return;
2527
2528         ethdev->drv_unregister_cnic(dev->netdev);
2529 }
2530
2531 static int cnic_start_hw(struct cnic_dev *dev)
2532 {
2533         struct cnic_local *cp = dev->cnic_priv;
2534         struct cnic_eth_dev *ethdev = cp->ethdev;
2535         int err;
2536
2537         if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
2538                 return -EALREADY;
2539
2540         dev->regview = ethdev->io_base;
2541         cp->chip_id = ethdev->chip_id;
2542         pci_dev_get(dev->pcidev);
2543         cp->func = PCI_FUNC(dev->pcidev->devfn);
2544         cp->status_blk = ethdev->irq_arr[0].status_blk;
2545         cp->status_blk_num = ethdev->irq_arr[0].status_blk_num;
2546
2547         err = cp->alloc_resc(dev);
2548         if (err) {
2549                 printk(KERN_ERR PFX "%s: allocate resource failure\n",
2550                        dev->netdev->name);
2551                 goto err1;
2552         }
2553
2554         err = cp->start_hw(dev);
2555         if (err)
2556                 goto err1;
2557
2558         err = cnic_cm_open(dev);
2559         if (err)
2560                 goto err1;
2561
2562         set_bit(CNIC_F_CNIC_UP, &dev->flags);
2563
2564         cp->enable_int(dev);
2565
2566         return 0;
2567
2568 err1:
2569         cp->free_resc(dev);
2570         pci_dev_put(dev->pcidev);
2571         return err;
2572 }
2573
2574 static void cnic_stop_bnx2_hw(struct cnic_dev *dev)
2575 {
2576         cnic_disable_bnx2_int_sync(dev);
2577
2578         cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2579         cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2580
2581         cnic_init_context(dev, KWQ_CID);
2582         cnic_init_context(dev, KCQ_CID);
2583
2584         cnic_setup_5709_context(dev, 0);
2585         cnic_free_irq(dev);
2586
2587         cnic_free_resc(dev);
2588 }
2589
2590 static void cnic_stop_hw(struct cnic_dev *dev)
2591 {
2592         if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2593                 struct cnic_local *cp = dev->cnic_priv;
2594
2595                 clear_bit(CNIC_F_CNIC_UP, &dev->flags);
2596                 rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], NULL);
2597                 synchronize_rcu();
2598                 cnic_cm_shutdown(dev);
2599                 cp->stop_hw(dev);
2600                 pci_dev_put(dev->pcidev);
2601         }
2602 }
2603
2604 static void cnic_free_dev(struct cnic_dev *dev)
2605 {
2606         int i = 0;
2607
2608         while ((atomic_read(&dev->ref_count) != 0) && i < 10) {
2609                 msleep(100);
2610                 i++;
2611         }
2612         if (atomic_read(&dev->ref_count) != 0)
2613                 printk(KERN_ERR PFX "%s: Failed waiting for ref count to go"
2614                                     " to zero.\n", dev->netdev->name);
2615
2616         printk(KERN_INFO PFX "Removed CNIC device: %s\n", dev->netdev->name);
2617         dev_put(dev->netdev);
2618         kfree(dev);
2619 }
2620
2621 static struct cnic_dev *cnic_alloc_dev(struct net_device *dev,
2622                                        struct pci_dev *pdev)
2623 {
2624         struct cnic_dev *cdev;
2625         struct cnic_local *cp;
2626         int alloc_size;
2627
2628         alloc_size = sizeof(struct cnic_dev) + sizeof(struct cnic_local);
2629
2630         cdev = kzalloc(alloc_size , GFP_KERNEL);
2631         if (cdev == NULL) {
2632                 printk(KERN_ERR PFX "%s: allocate dev struct failure\n",
2633                        dev->name);
2634                 return NULL;
2635         }
2636
2637         cdev->netdev = dev;
2638         cdev->cnic_priv = (char *)cdev + sizeof(struct cnic_dev);
2639         cdev->register_device = cnic_register_device;
2640         cdev->unregister_device = cnic_unregister_device;
2641         cdev->iscsi_nl_msg_recv = cnic_iscsi_nl_msg_recv;
2642
2643         cp = cdev->cnic_priv;
2644         cp->dev = cdev;
2645         cp->uio_dev = -1;
2646         cp->l2_single_buf_size = 0x400;
2647         cp->l2_rx_ring_size = 3;
2648
2649         spin_lock_init(&cp->cnic_ulp_lock);
2650
2651         printk(KERN_INFO PFX "Added CNIC device: %s\n", dev->name);
2652
2653         return cdev;
2654 }
2655
2656 static struct cnic_dev *init_bnx2_cnic(struct net_device *dev)
2657 {
2658         struct pci_dev *pdev;
2659         struct cnic_dev *cdev;
2660         struct cnic_local *cp;
2661         struct cnic_eth_dev *ethdev = NULL;
2662         struct cnic_eth_dev *(*probe)(struct net_device *) = NULL;
2663
2664         probe = symbol_get(bnx2_cnic_probe);
2665         if (probe) {
2666                 ethdev = (*probe)(dev);
2667                 symbol_put(bnx2_cnic_probe);
2668         }
2669         if (!ethdev)
2670                 return NULL;
2671
2672         pdev = ethdev->pdev;
2673         if (!pdev)
2674                 return NULL;
2675
2676         dev_hold(dev);
2677         pci_dev_get(pdev);
2678         if (pdev->device == PCI_DEVICE_ID_NX2_5709 ||
2679             pdev->device == PCI_DEVICE_ID_NX2_5709S) {
2680                 u8 rev;
2681
2682                 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
2683                 if (rev < 0x10) {
2684                         pci_dev_put(pdev);
2685                         goto cnic_err;
2686                 }
2687         }
2688         pci_dev_put(pdev);
2689
2690         cdev = cnic_alloc_dev(dev, pdev);
2691         if (cdev == NULL)
2692                 goto cnic_err;
2693
2694         set_bit(CNIC_F_BNX2_CLASS, &cdev->flags);
2695         cdev->submit_kwqes = cnic_submit_bnx2_kwqes;
2696
2697         cp = cdev->cnic_priv;
2698         cp->ethdev = ethdev;
2699         cdev->pcidev = pdev;
2700
2701         cp->cnic_ops = &cnic_bnx2_ops;
2702         cp->start_hw = cnic_start_bnx2_hw;
2703         cp->stop_hw = cnic_stop_bnx2_hw;
2704         cp->setup_pgtbl = cnic_setup_page_tbl;
2705         cp->alloc_resc = cnic_alloc_bnx2_resc;
2706         cp->free_resc = cnic_free_resc;
2707         cp->start_cm = cnic_cm_init_bnx2_hw;
2708         cp->stop_cm = cnic_cm_stop_bnx2_hw;
2709         cp->enable_int = cnic_enable_bnx2_int;
2710         cp->disable_int_sync = cnic_disable_bnx2_int_sync;
2711         cp->close_conn = cnic_close_bnx2_conn;
2712         cp->next_idx = cnic_bnx2_next_idx;
2713         cp->hw_idx = cnic_bnx2_hw_idx;
2714         return cdev;
2715
2716 cnic_err:
2717         dev_put(dev);
2718         return NULL;
2719 }
2720
2721 static struct cnic_dev *is_cnic_dev(struct net_device *dev)
2722 {
2723         struct ethtool_drvinfo drvinfo;
2724         struct cnic_dev *cdev = NULL;
2725
2726         if (dev->ethtool_ops && dev->ethtool_ops->get_drvinfo) {
2727                 memset(&drvinfo, 0, sizeof(drvinfo));
2728                 dev->ethtool_ops->get_drvinfo(dev, &drvinfo);
2729
2730                 if (!strcmp(drvinfo.driver, "bnx2"))
2731                         cdev = init_bnx2_cnic(dev);
2732                 if (cdev) {
2733                         write_lock(&cnic_dev_lock);
2734                         list_add(&cdev->list, &cnic_dev_list);
2735                         write_unlock(&cnic_dev_lock);
2736                 }
2737         }
2738         return cdev;
2739 }
2740
2741 /**
2742  * netdev event handler
2743  */
2744 static int cnic_netdev_event(struct notifier_block *this, unsigned long event,
2745                                                          void *ptr)
2746 {
2747         struct net_device *netdev = ptr;
2748         struct cnic_dev *dev;
2749         int if_type;
2750         int new_dev = 0;
2751
2752         dev = cnic_from_netdev(netdev);
2753
2754         if (!dev && (event == NETDEV_REGISTER || event == NETDEV_UP)) {
2755                 /* Check for the hot-plug device */
2756                 dev = is_cnic_dev(netdev);
2757                 if (dev) {
2758                         new_dev = 1;
2759                         cnic_hold(dev);
2760                 }
2761         }
2762         if (dev) {
2763                 struct cnic_local *cp = dev->cnic_priv;
2764
2765                 if (new_dev)
2766                         cnic_ulp_init(dev);
2767                 else if (event == NETDEV_UNREGISTER)
2768                         cnic_ulp_exit(dev);
2769
2770                 if (event == NETDEV_UP) {
2771                         if (cnic_register_netdev(dev) != 0) {
2772                                 cnic_put(dev);
2773                                 goto done;
2774                         }
2775                         if (!cnic_start_hw(dev))
2776                                 cnic_ulp_start(dev);
2777                 }
2778
2779                 rcu_read_lock();
2780                 for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
2781                         struct cnic_ulp_ops *ulp_ops;
2782                         void *ctx;
2783
2784                         ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
2785                         if (!ulp_ops || !ulp_ops->indicate_netevent)
2786                                 continue;
2787
2788                         ctx = cp->ulp_handle[if_type];
2789
2790                         ulp_ops->indicate_netevent(ctx, event);
2791                 }
2792                 rcu_read_unlock();
2793
2794                 if (event == NETDEV_GOING_DOWN) {
2795                         cnic_ulp_stop(dev);
2796                         cnic_stop_hw(dev);
2797                         cnic_unregister_netdev(dev);
2798                 } else if (event == NETDEV_UNREGISTER) {
2799                         write_lock(&cnic_dev_lock);
2800                         list_del_init(&dev->list);
2801                         write_unlock(&cnic_dev_lock);
2802
2803                         cnic_put(dev);
2804                         cnic_free_dev(dev);
2805                         goto done;
2806                 }
2807                 cnic_put(dev);
2808         }
2809 done:
2810         return NOTIFY_DONE;
2811 }
2812
2813 static struct notifier_block cnic_netdev_notifier = {
2814         .notifier_call = cnic_netdev_event
2815 };
2816
2817 static void cnic_release(void)
2818 {
2819         struct cnic_dev *dev;
2820
2821         while (!list_empty(&cnic_dev_list)) {
2822                 dev = list_entry(cnic_dev_list.next, struct cnic_dev, list);
2823                 if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2824                         cnic_ulp_stop(dev);
2825                         cnic_stop_hw(dev);
2826                 }
2827
2828                 cnic_ulp_exit(dev);
2829                 cnic_unregister_netdev(dev);
2830                 list_del_init(&dev->list);
2831                 cnic_free_dev(dev);
2832         }
2833 }
2834
2835 static int __init cnic_init(void)
2836 {
2837         int rc = 0;
2838
2839         printk(KERN_INFO "%s", version);
2840
2841         rc = register_netdevice_notifier(&cnic_netdev_notifier);
2842         if (rc) {
2843                 cnic_release();
2844                 return rc;
2845         }
2846
2847         return 0;
2848 }
2849
2850 static void __exit cnic_exit(void)
2851 {
2852         unregister_netdevice_notifier(&cnic_netdev_notifier);
2853         cnic_release();
2854         return;
2855 }
2856
2857 module_init(cnic_init);
2858 module_exit(cnic_exit);