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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 "cnic.h"
  41 #include "cnic_defs.h"
  42
  43 #define DRV_MODULE_NAME         "cnic"
  44 #define PFX DRV_MODULE_NAME     ": "
  45
  46 static char version[] __devinitdata =
  47         "Broadcom NetXtreme II CNIC Driver " DRV_MODULE_NAME " v" CNIC_MODULE_VERSION " (" CNIC_MODULE_RELDATE ")\n";
  48
  49 MODULE_AUTHOR("Michael Chan <mchan@broadcom.com> and John(Zongxi) "
  50               "Chen (zongxi@broadcom.com");
  51 MODULE_DESCRIPTION("Broadcom NetXtreme II CNIC Driver");
  52 MODULE_LICENSE("GPL");
  53 MODULE_VERSION(CNIC_MODULE_VERSION);
  54
  55 static LIST_HEAD(cnic_dev_list);
  56 static DEFINE_RWLOCK(cnic_dev_lock);
  57 static DEFINE_MUTEX(cnic_lock);
  58
  59 static struct cnic_ulp_ops *cnic_ulp_tbl[MAX_CNIC_ULP_TYPE];
  60
  61 static int cnic_service_bnx2(void *, void *);
  62 static int cnic_ctl(void *, struct cnic_ctl_info *);
  63
  64 static struct cnic_ops cnic_bnx2_ops = {
  65         .cnic_owner     = THIS_MODULE,
  66         .cnic_handler   = cnic_service_bnx2,
  67         .cnic_ctl       = cnic_ctl,
  68 };
  69
  70 static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *);
  71 static void cnic_init_bnx2_tx_ring(struct cnic_dev *);
  72 static void cnic_init_bnx2_rx_ring(struct cnic_dev *);
  73 static int cnic_cm_set_pg(struct cnic_sock *);
  74
  75 static int cnic_uio_open(struct uio_info *uinfo, struct inode *inode)
  76 {
  77         struct cnic_dev *dev = uinfo->priv;
  78         struct cnic_local *cp = dev->cnic_priv;
  79
  80         if (!capable(CAP_NET_ADMIN))
  81                 return -EPERM;
  82
  83         if (cp->uio_dev != -1)
  84                 return -EBUSY;
  85
  86         cp->uio_dev = iminor(inode);
  87
  88         cnic_shutdown_bnx2_rx_ring(dev);
  89
  90         cnic_init_bnx2_tx_ring(dev);
  91         cnic_init_bnx2_rx_ring(dev);
  92
  93         return 0;
  94 }
  95
  96 static int cnic_uio_close(struct uio_info *uinfo, struct inode *inode)
  97 {
  98         struct cnic_dev *dev = uinfo->priv;
  99         struct cnic_local *cp = dev->cnic_priv;
 100
 101         cp->uio_dev = -1;
 102         return 0;
 103 }
 104
 105 static inline void cnic_hold(struct cnic_dev *dev)
 106 {
 107         atomic_inc(&dev->ref_count);
 108 }
 109
 110 static inline void cnic_put(struct cnic_dev *dev)
 111 {
 112         atomic_dec(&dev->ref_count);
 113 }
 114
 115 static inline void csk_hold(struct cnic_sock *csk)
 116 {
 117         atomic_inc(&csk->ref_count);
 118 }
 119
 120 static inline void csk_put(struct cnic_sock *csk)
 121 {
 122         atomic_dec(&csk->ref_count);
 123 }
 124
 125 static struct cnic_dev *cnic_from_netdev(struct net_device *netdev)
 126 {
 127         struct cnic_dev *cdev;
 128
 129         read_lock(&cnic_dev_lock);
 130         list_for_each_entry(cdev, &cnic_dev_list, list) {
 131                 if (netdev == cdev->netdev) {
 132                         cnic_hold(cdev);
 133                         read_unlock(&cnic_dev_lock);
 134                         return cdev;
 135                 }
 136         }
 137         read_unlock(&cnic_dev_lock);
 138         return NULL;
 139 }
 140
 141 static void cnic_ctx_wr(struct cnic_dev *dev, u32 cid_addr, u32 off, u32 val)
 142 {
 143         struct cnic_local *cp = dev->cnic_priv;
 144         struct cnic_eth_dev *ethdev = cp->ethdev;
 145         struct drv_ctl_info info;
 146         struct drv_ctl_io *io = &info.data.io;
 147
 148         info.cmd = DRV_CTL_CTX_WR_CMD;
 149         io->cid_addr = cid_addr;
 150         io->offset = off;
 151         io->data = val;
 152         ethdev->drv_ctl(dev->netdev, &info);
 153 }
 154
 155 static void cnic_reg_wr_ind(struct cnic_dev *dev, u32 off, u32 val)
 156 {
 157         struct cnic_local *cp = dev->cnic_priv;
 158         struct cnic_eth_dev *ethdev = cp->ethdev;
 159         struct drv_ctl_info info;
 160         struct drv_ctl_io *io = &info.data.io;
 161
 162         info.cmd = DRV_CTL_IO_WR_CMD;
 163         io->offset = off;
 164         io->data = val;
 165         ethdev->drv_ctl(dev->netdev, &info);
 166 }
 167
 168 static u32 cnic_reg_rd_ind(struct cnic_dev *dev, u32 off)
 169 {
 170         struct cnic_local *cp = dev->cnic_priv;
 171         struct cnic_eth_dev *ethdev = cp->ethdev;
 172         struct drv_ctl_info info;
 173         struct drv_ctl_io *io = &info.data.io;
 174
 175         info.cmd = DRV_CTL_IO_RD_CMD;
 176         io->offset = off;
 177         ethdev->drv_ctl(dev->netdev, &info);
 178         return io->data;
 179 }
 180
 181 static int cnic_in_use(struct cnic_sock *csk)
 182 {
 183         return test_bit(SK_F_INUSE, &csk->flags);
 184 }
 185
 186 static void cnic_kwq_completion(struct cnic_dev *dev, u32 count)
 187 {
 188         struct cnic_local *cp = dev->cnic_priv;
 189         struct cnic_eth_dev *ethdev = cp->ethdev;
 190         struct drv_ctl_info info;
 191
 192         info.cmd = DRV_CTL_COMPLETION_CMD;
 193         info.data.comp.comp_count = count;
 194         ethdev->drv_ctl(dev->netdev, &info);
 195 }
 196
 197 static int cnic_send_nlmsg(struct cnic_local *cp, u32 type,
 198                            struct cnic_sock *csk)
 199 {
 200         struct iscsi_path path_req;
 201         char *buf = NULL;
 202         u16 len = 0;
 203         u32 msg_type = ISCSI_KEVENT_IF_DOWN;
 204         struct cnic_ulp_ops *ulp_ops;
 205
 206         if (cp->uio_dev == -1)
 207                 return -ENODEV;
 208
 209         if (csk) {
 210                 len = sizeof(path_req);
 211                 buf = (char *) &path_req;
 212                 memset(&path_req, 0, len);
 213
 214                 msg_type = ISCSI_KEVENT_PATH_REQ;
 215                 path_req.handle = (u64) csk->l5_cid;
 216                 if (test_bit(SK_F_IPV6, &csk->flags)) {
 217                         memcpy(&path_req.dst.v6_addr, &csk->dst_ip[0],
 218                                sizeof(struct in6_addr));
 219                         path_req.ip_addr_len = 16;
 220                 } else {
 221                         memcpy(&path_req.dst.v4_addr, &csk->dst_ip[0],
 222                                sizeof(struct in_addr));
 223                         path_req.ip_addr_len = 4;
 224                 }
 225                 path_req.vlan_id = csk->vlan_id;
 226                 path_req.pmtu = csk->mtu;
 227         }
 228
 229         rcu_read_lock();
 230         ulp_ops = rcu_dereference(cnic_ulp_tbl[CNIC_ULP_ISCSI]);
 231         if (ulp_ops)
 232                 ulp_ops->iscsi_nl_send_msg(cp->dev, msg_type, buf, len);
 233         rcu_read_unlock();
 234         return 0;
 235 }
 236
 237 static int cnic_iscsi_nl_msg_recv(struct cnic_dev *dev, u32 msg_type,
 238                                   char *buf, u16 len)
 239 {
 240         int rc = -EINVAL;
 241
 242         switch (msg_type) {
 243         case ISCSI_UEVENT_PATH_UPDATE: {
 244                 struct cnic_local *cp;
 245                 u32 l5_cid;
 246                 struct cnic_sock *csk;
 247                 struct iscsi_path *path_resp;
 248
 249                 if (len < sizeof(*path_resp))
 250                         break;
 251
 252                 path_resp = (struct iscsi_path *) buf;
 253                 cp = dev->cnic_priv;
 254                 l5_cid = (u32) path_resp->handle;
 255                 if (l5_cid >= MAX_CM_SK_TBL_SZ)
 256                         break;
 257
 258                 csk = &cp->csk_tbl[l5_cid];
 259                 csk_hold(csk);
 260                 if (cnic_in_use(csk)) {
 261                         memcpy(csk->ha, path_resp->mac_addr, 6);
 262                         if (test_bit(SK_F_IPV6, &csk->flags))
 263                                 memcpy(&csk->src_ip[0], &path_resp->src.v6_addr,
 264                                        sizeof(struct in6_addr));
 265                         else
 266                                 memcpy(&csk->src_ip[0], &path_resp->src.v4_addr,
 267                                        sizeof(struct in_addr));
 268                         if (is_valid_ether_addr(csk->ha))
 269                                 cnic_cm_set_pg(csk);
 270                 }
 271                 csk_put(csk);
 272                 rc = 0;
 273         }
 274         }
 275
 276         return rc;
 277 }
 278
 279 static int cnic_offld_prep(struct cnic_sock *csk)
 280 {
 281         if (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
 282                 return 0;
 283
 284         if (!test_bit(SK_F_CONNECT_START, &csk->flags)) {
 285                 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
 286                 return 0;
 287         }
 288
 289         return 1;
 290 }
 291
 292 static int cnic_close_prep(struct cnic_sock *csk)
 293 {
 294         clear_bit(SK_F_CONNECT_START, &csk->flags);
 295         smp_mb__after_clear_bit();
 296
 297         if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags)) {
 298                 while (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
 299                         msleep(1);
 300
 301                 return 1;
 302         }
 303         return 0;
 304 }
 305
 306 static int cnic_abort_prep(struct cnic_sock *csk)
 307 {
 308         clear_bit(SK_F_CONNECT_START, &csk->flags);
 309         smp_mb__after_clear_bit();
 310
 311         while (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
 312                 msleep(1);
 313
 314         if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags)) {
 315                 csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
 316                 return 1;
 317         }
 318
 319         return 0;
 320 }
 321
 322 static void cnic_uio_stop(void)
 323 {
 324         struct cnic_dev *dev;
 325
 326         read_lock(&cnic_dev_lock);
 327         list_for_each_entry(dev, &cnic_dev_list, list) {
 328                 struct cnic_local *cp = dev->cnic_priv;
 329
 330                 if (cp->cnic_uinfo)
 331                         cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
 332         }
 333         read_unlock(&cnic_dev_lock);
 334 }
 335
 336 int cnic_register_driver(int ulp_type, struct cnic_ulp_ops *ulp_ops)
 337 {
 338         struct cnic_dev *dev;
 339
 340         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 341                 printk(KERN_ERR PFX "cnic_register_driver: Bad type %d\n",
 342                        ulp_type);
 343                 return -EINVAL;
 344         }
 345         mutex_lock(&cnic_lock);
 346         if (cnic_ulp_tbl[ulp_type]) {
 347                 printk(KERN_ERR PFX "cnic_register_driver: Type %d has already "
 348                                     "been registered\n", ulp_type);
 349                 mutex_unlock(&cnic_lock);
 350                 return -EBUSY;
 351         }
 352
 353         read_lock(&cnic_dev_lock);
 354         list_for_each_entry(dev, &cnic_dev_list, list) {
 355                 struct cnic_local *cp = dev->cnic_priv;
 356
 357                 clear_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]);
 358         }
 359         read_unlock(&cnic_dev_lock);
 360
 361         rcu_assign_pointer(cnic_ulp_tbl[ulp_type], ulp_ops);
 362         mutex_unlock(&cnic_lock);
 363
 364         /* Prevent race conditions with netdev_event */
 365         rtnl_lock();
 366         read_lock(&cnic_dev_lock);
 367         list_for_each_entry(dev, &cnic_dev_list, list) {
 368                 struct cnic_local *cp = dev->cnic_priv;
 369
 370                 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]))
 371                         ulp_ops->cnic_init(dev);
 372         }
 373         read_unlock(&cnic_dev_lock);
 374         rtnl_unlock();
 375
 376         return 0;
 377 }
 378
 379 int cnic_unregister_driver(int ulp_type)
 380 {
 381         struct cnic_dev *dev;
 382
 383         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 384                 printk(KERN_ERR PFX "cnic_unregister_driver: Bad type %d\n",
 385                        ulp_type);
 386                 return -EINVAL;
 387         }
 388         mutex_lock(&cnic_lock);
 389         if (!cnic_ulp_tbl[ulp_type]) {
 390                 printk(KERN_ERR PFX "cnic_unregister_driver: Type %d has not "
 391                                     "been registered\n", ulp_type);
 392                 goto out_unlock;
 393         }
 394         read_lock(&cnic_dev_lock);
 395         list_for_each_entry(dev, &cnic_dev_list, list) {
 396                 struct cnic_local *cp = dev->cnic_priv;
 397
 398                 if (rcu_dereference(cp->ulp_ops[ulp_type])) {
 399                         printk(KERN_ERR PFX "cnic_unregister_driver: Type %d "
 400                                "still has devices registered\n", ulp_type);
 401                         read_unlock(&cnic_dev_lock);
 402                         goto out_unlock;
 403                 }
 404         }
 405         read_unlock(&cnic_dev_lock);
 406
 407         if (ulp_type == CNIC_ULP_ISCSI)
 408                 cnic_uio_stop();
 409
 410         rcu_assign_pointer(cnic_ulp_tbl[ulp_type], NULL);
 411
 412         mutex_unlock(&cnic_lock);
 413         synchronize_rcu();
 414         return 0;
 415
 416 out_unlock:
 417         mutex_unlock(&cnic_lock);
 418         return -EINVAL;
 419 }
 420
 421 static int cnic_start_hw(struct cnic_dev *);
 422 static void cnic_stop_hw(struct cnic_dev *);
 423
 424 static int cnic_register_device(struct cnic_dev *dev, int ulp_type,
 425                                 void *ulp_ctx)
 426 {
 427         struct cnic_local *cp = dev->cnic_priv;
 428         struct cnic_ulp_ops *ulp_ops;
 429
 430         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 431                 printk(KERN_ERR PFX "cnic_register_device: Bad type %d\n",
 432                        ulp_type);
 433                 return -EINVAL;
 434         }
 435         mutex_lock(&cnic_lock);
 436         if (cnic_ulp_tbl[ulp_type] == NULL) {
 437                 printk(KERN_ERR PFX "cnic_register_device: Driver with type %d "
 438                                     "has not been registered\n", ulp_type);
 439                 mutex_unlock(&cnic_lock);
 440                 return -EAGAIN;
 441         }
 442         if (rcu_dereference(cp->ulp_ops[ulp_type])) {
 443                 printk(KERN_ERR PFX "cnic_register_device: Type %d has already "
 444                        "been registered to this device\n", ulp_type);
 445                 mutex_unlock(&cnic_lock);
 446                 return -EBUSY;
 447         }
 448
 449         clear_bit(ULP_F_START, &cp->ulp_flags[ulp_type]);
 450         cp->ulp_handle[ulp_type] = ulp_ctx;
 451         ulp_ops = cnic_ulp_tbl[ulp_type];
 452         rcu_assign_pointer(cp->ulp_ops[ulp_type], ulp_ops);
 453         cnic_hold(dev);
 454
 455         if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
 456                 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[ulp_type]))
 457                         ulp_ops->cnic_start(cp->ulp_handle[ulp_type]);
 458
 459         mutex_unlock(&cnic_lock);
 460
 461         return 0;
 462
 463 }
 464 EXPORT_SYMBOL(cnic_register_driver);
 465
 466 static int cnic_unregister_device(struct cnic_dev *dev, int ulp_type)
 467 {
 468         struct cnic_local *cp = dev->cnic_priv;
 469
 470         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 471                 printk(KERN_ERR PFX "cnic_unregister_device: Bad type %d\n",
 472                        ulp_type);
 473                 return -EINVAL;
 474         }
 475         mutex_lock(&cnic_lock);
 476         if (rcu_dereference(cp->ulp_ops[ulp_type])) {
 477                 rcu_assign_pointer(cp->ulp_ops[ulp_type], NULL);
 478                 cnic_put(dev);
 479         } else {
 480                 printk(KERN_ERR PFX "cnic_unregister_device: device not "
 481                        "registered to this ulp type %d\n", ulp_type);
 482                 mutex_unlock(&cnic_lock);
 483                 return -EINVAL;
 484         }
 485         mutex_unlock(&cnic_lock);
 486
 487         synchronize_rcu();
 488
 489         return 0;
 490 }
 491 EXPORT_SYMBOL(cnic_unregister_driver);
 492
 493 static int cnic_init_id_tbl(struct cnic_id_tbl *id_tbl, u32 size, u32 start_id)
 494 {
 495         id_tbl->start = start_id;
 496         id_tbl->max = size;
 497         id_tbl->next = 0;
 498         spin_lock_init(&id_tbl->lock);
 499         id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
 500         if (!id_tbl->table)
 501                 return -ENOMEM;
 502
 503         return 0;
 504 }
 505
 506 static void cnic_free_id_tbl(struct cnic_id_tbl *id_tbl)
 507 {
 508         kfree(id_tbl->table);
 509         id_tbl->table = NULL;
 510 }
 511
 512 static int cnic_alloc_id(struct cnic_id_tbl *id_tbl, u32 id)
 513 {
 514         int ret = -1;
 515
 516         id -= id_tbl->start;
 517         if (id >= id_tbl->max)
 518                 return ret;
 519
 520         spin_lock(&id_tbl->lock);
 521         if (!test_bit(id, id_tbl->table)) {
 522                 set_bit(id, id_tbl->table);
 523                 ret = 0;
 524         }
 525         spin_unlock(&id_tbl->lock);
 526         return ret;
 527 }
 528
 529 /* Returns -1 if not successful */
 530 static u32 cnic_alloc_new_id(struct cnic_id_tbl *id_tbl)
 531 {
 532         u32 id;
 533
 534         spin_lock(&id_tbl->lock);
 535         id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
 536         if (id >= id_tbl->max) {
 537                 id = -1;
 538                 if (id_tbl->next != 0) {
 539                         id = find_first_zero_bit(id_tbl->table, id_tbl->next);
 540                         if (id >= id_tbl->next)
 541                                 id = -1;
 542                 }
 543         }
 544
 545         if (id < id_tbl->max) {
 546                 set_bit(id, id_tbl->table);
 547                 id_tbl->next = (id + 1) & (id_tbl->max - 1);
 548                 id += id_tbl->start;
 549         }
 550
 551         spin_unlock(&id_tbl->lock);
 552
 553         return id;
 554 }
 555
 556 static void cnic_free_id(struct cnic_id_tbl *id_tbl, u32 id)
 557 {
 558         if (id == -1)
 559                 return;
 560
 561         id -= id_tbl->start;
 562         if (id >= id_tbl->max)
 563                 return;
 564
 565         clear_bit(id, id_tbl->table);
 566 }
 567
 568 static void cnic_free_dma(struct cnic_dev *dev, struct cnic_dma *dma)
 569 {
 570         int i;
 571
 572         if (!dma->pg_arr)
 573                 return;
 574
 575         for (i = 0; i < dma->num_pages; i++) {
 576                 if (dma->pg_arr[i]) {
 577                         pci_free_consistent(dev->pcidev, BCM_PAGE_SIZE,
 578                                             dma->pg_arr[i], dma->pg_map_arr[i]);
 579                         dma->pg_arr[i] = NULL;
 580                 }
 581         }
 582         if (dma->pgtbl) {
 583                 pci_free_consistent(dev->pcidev, dma->pgtbl_size,
 584                                     dma->pgtbl, dma->pgtbl_map);
 585                 dma->pgtbl = NULL;
 586         }
 587         kfree(dma->pg_arr);
 588         dma->pg_arr = NULL;
 589         dma->num_pages = 0;
 590 }
 591
 592 static void cnic_setup_page_tbl(struct cnic_dev *dev, struct cnic_dma *dma)
 593 {
 594         int i;
 595         u32 *page_table = dma->pgtbl;
 596
 597         for (i = 0; i < dma->num_pages; i++) {
 598                 /* Each entry needs to be in big endian format. */
 599                 *page_table = (u32) ((u64) dma->pg_map_arr[i] >> 32);
 600                 page_table++;
 601                 *page_table = (u32) dma->pg_map_arr[i];
 602                 page_table++;
 603         }
 604 }
 605
 606 static int cnic_alloc_dma(struct cnic_dev *dev, struct cnic_dma *dma,
 607                           int pages, int use_pg_tbl)
 608 {
 609         int i, size;
 610         struct cnic_local *cp = dev->cnic_priv;
 611
 612         size = pages * (sizeof(void *) + sizeof(dma_addr_t));
 613         dma->pg_arr = kzalloc(size, GFP_ATOMIC);
 614         if (dma->pg_arr == NULL)
 615                 return -ENOMEM;
 616
 617         dma->pg_map_arr = (dma_addr_t *) (dma->pg_arr + pages);
 618         dma->num_pages = pages;
 619
 620         for (i = 0; i < pages; i++) {
 621                 dma->pg_arr[i] = pci_alloc_consistent(dev->pcidev,
 622                                                       BCM_PAGE_SIZE,
 623                                                       &dma->pg_map_arr[i]);
 624                 if (dma->pg_arr[i] == NULL)
 625                         goto error;
 626         }
 627         if (!use_pg_tbl)
 628                 return 0;
 629
 630         dma->pgtbl_size = ((pages * 8) + BCM_PAGE_SIZE - 1) &
 631                           ~(BCM_PAGE_SIZE - 1);
 632         dma->pgtbl = pci_alloc_consistent(dev->pcidev, dma->pgtbl_size,
 633                                           &dma->pgtbl_map);
 634         if (dma->pgtbl == NULL)
 635                 goto error;
 636
 637         cp->setup_pgtbl(dev, dma);
 638
 639         return 0;
 640
 641 error:
 642         cnic_free_dma(dev, dma);
 643         return -ENOMEM;
 644 }
 645
 646 static void cnic_free_resc(struct cnic_dev *dev)
 647 {
 648         struct cnic_local *cp = dev->cnic_priv;
 649         int i = 0;
 650
 651         if (cp->cnic_uinfo) {
 652                 while (cp->uio_dev != -1 && i < 15) {
 653                         msleep(100);
 654                         i++;
 655                 }
 656                 uio_unregister_device(cp->cnic_uinfo);
 657                 kfree(cp->cnic_uinfo);
 658                 cp->cnic_uinfo = NULL;
 659         }
 660
 661         if (cp->l2_buf) {
 662                 pci_free_consistent(dev->pcidev, cp->l2_buf_size,
 663                                     cp->l2_buf, cp->l2_buf_map);
 664                 cp->l2_buf = NULL;
 665         }
 666
 667         if (cp->l2_ring) {
 668                 pci_free_consistent(dev->pcidev, cp->l2_ring_size,
 669                                     cp->l2_ring, cp->l2_ring_map);
 670                 cp->l2_ring = NULL;
 671         }
 672
 673         for (i = 0; i < cp->ctx_blks; i++) {
 674                 if (cp->ctx_arr[i].ctx) {
 675                         pci_free_consistent(dev->pcidev, cp->ctx_blk_size,
 676                                             cp->ctx_arr[i].ctx,
 677                                             cp->ctx_arr[i].mapping);
 678                         cp->ctx_arr[i].ctx = NULL;
 679                 }
 680         }
 681         kfree(cp->ctx_arr);
 682         cp->ctx_arr = NULL;
 683         cp->ctx_blks = 0;
 684
 685         cnic_free_dma(dev, &cp->gbl_buf_info);
 686         cnic_free_dma(dev, &cp->conn_buf_info);
 687         cnic_free_dma(dev, &cp->kwq_info);
 688         cnic_free_dma(dev, &cp->kcq_info);
 689         kfree(cp->iscsi_tbl);
 690         cp->iscsi_tbl = NULL;
 691         kfree(cp->ctx_tbl);
 692         cp->ctx_tbl = NULL;
 693
 694         cnic_free_id_tbl(&cp->cid_tbl);
 695 }
 696
 697 static int cnic_alloc_context(struct cnic_dev *dev)
 698 {
 699         struct cnic_local *cp = dev->cnic_priv;
 700
 701         if (CHIP_NUM(cp) == CHIP_NUM_5709) {
 702                 int i, k, arr_size;
 703
 704                 cp->ctx_blk_size = BCM_PAGE_SIZE;
 705                 cp->cids_per_blk = BCM_PAGE_SIZE / 128;
 706                 arr_size = BNX2_MAX_CID / cp->cids_per_blk *
 707                            sizeof(struct cnic_ctx);
 708                 cp->ctx_arr = kzalloc(arr_size, GFP_KERNEL);
 709                 if (cp->ctx_arr == NULL)
 710                         return -ENOMEM;
 711
 712                 k = 0;
 713                 for (i = 0; i < 2; i++) {
 714                         u32 j, reg, off, lo, hi;
 715
 716                         if (i == 0)
 717                                 off = BNX2_PG_CTX_MAP;
 718                         else
 719                                 off = BNX2_ISCSI_CTX_MAP;
 720
 721                         reg = cnic_reg_rd_ind(dev, off);
 722                         lo = reg >> 16;
 723                         hi = reg & 0xffff;
 724                         for (j = lo; j < hi; j += cp->cids_per_blk, k++)
 725                                 cp->ctx_arr[k].cid = j;
 726                 }
 727
 728                 cp->ctx_blks = k;
 729                 if (cp->ctx_blks >= (BNX2_MAX_CID / cp->cids_per_blk)) {
 730                         cp->ctx_blks = 0;
 731                         return -ENOMEM;
 732                 }
 733
 734                 for (i = 0; i < cp->ctx_blks; i++) {
 735                         cp->ctx_arr[i].ctx =
 736                                 pci_alloc_consistent(dev->pcidev, BCM_PAGE_SIZE,
 737                                                      &cp->ctx_arr[i].mapping);
 738                         if (cp->ctx_arr[i].ctx == NULL)
 739                                 return -ENOMEM;
 740                 }
 741         }
 742         return 0;
 743 }
 744
 745 static int cnic_alloc_bnx2_resc(struct cnic_dev *dev)
 746 {
 747         struct cnic_local *cp = dev->cnic_priv;
 748         struct uio_info *uinfo;
 749         int ret;
 750
 751         ret = cnic_alloc_dma(dev, &cp->kwq_info, KWQ_PAGE_CNT, 1);
 752         if (ret)
 753                 goto error;
 754         cp->kwq = (struct kwqe **) cp->kwq_info.pg_arr;
 755
 756         ret = cnic_alloc_dma(dev, &cp->kcq_info, KCQ_PAGE_CNT, 1);
 757         if (ret)
 758                 goto error;
 759         cp->kcq = (struct kcqe **) cp->kcq_info.pg_arr;
 760
 761         ret = cnic_alloc_context(dev);
 762         if (ret)
 763                 goto error;
 764
 765         cp->l2_ring_size = 2 * BCM_PAGE_SIZE;
 766         cp->l2_ring = pci_alloc_consistent(dev->pcidev, cp->l2_ring_size,
 767                                            &cp->l2_ring_map);
 768         if (!cp->l2_ring)
 769                 goto error;
 770
 771         cp->l2_buf_size = (cp->l2_rx_ring_size + 1) * cp->l2_single_buf_size;
 772         cp->l2_buf_size = PAGE_ALIGN(cp->l2_buf_size);
 773         cp->l2_buf = pci_alloc_consistent(dev->pcidev, cp->l2_buf_size,
 774                                            &cp->l2_buf_map);
 775         if (!cp->l2_buf)
 776                 goto error;
 777
 778         uinfo = kzalloc(sizeof(*uinfo), GFP_ATOMIC);
 779         if (!uinfo)
 780                 goto error;
 781
 782         uinfo->mem[0].addr = dev->netdev->base_addr;
 783         uinfo->mem[0].internal_addr = dev->regview;
 784         uinfo->mem[0].size = dev->netdev->mem_end - dev->netdev->mem_start;
 785         uinfo->mem[0].memtype = UIO_MEM_PHYS;
 786
 787         uinfo->mem[1].addr = (unsigned long) cp->status_blk & PAGE_MASK;
 788         if (cp->ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX)
 789                 uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE * 9;
 790         else
 791                 uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE;
 792         uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
 793
 794         uinfo->mem[2].addr = (unsigned long) cp->l2_ring;
 795         uinfo->mem[2].size = cp->l2_ring_size;
 796         uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
 797
 798         uinfo->mem[3].addr = (unsigned long) cp->l2_buf;
 799         uinfo->mem[3].size = cp->l2_buf_size;
 800         uinfo->mem[3].memtype = UIO_MEM_LOGICAL;
 801
 802         uinfo->name = "bnx2_cnic";
 803         uinfo->version = CNIC_MODULE_VERSION;
 804         uinfo->irq = UIO_IRQ_CUSTOM;
 805
 806         uinfo->open = cnic_uio_open;
 807         uinfo->release = cnic_uio_close;
 808
 809         uinfo->priv = dev;
 810
 811         ret = uio_register_device(&dev->pcidev->dev, uinfo);
 812         if (ret) {
 813                 kfree(uinfo);
 814                 goto error;
 815         }
 816
 817         cp->cnic_uinfo = uinfo;
 818
 819         return 0;
 820
 821 error:
 822         cnic_free_resc(dev);
 823         return ret;
 824 }
 825
 826 static inline u32 cnic_kwq_avail(struct cnic_local *cp)
 827 {
 828         return cp->max_kwq_idx -
 829                 ((cp->kwq_prod_idx - cp->kwq_con_idx) & cp->max_kwq_idx);
 830 }
 831
 832 static int cnic_submit_bnx2_kwqes(struct cnic_dev *dev, struct kwqe *wqes[],
 833                                   u32 num_wqes)
 834 {
 835         struct cnic_local *cp = dev->cnic_priv;
 836         struct kwqe *prod_qe;
 837         u16 prod, sw_prod, i;
 838
 839         if (!test_bit(CNIC_F_CNIC_UP, &dev->flags))
 840                 return -EAGAIN;         /* bnx2 is down */
 841
 842         spin_lock_bh(&cp->cnic_ulp_lock);
 843         if (num_wqes > cnic_kwq_avail(cp) &&
 844             !(cp->cnic_local_flags & CNIC_LCL_FL_KWQ_INIT)) {
 845                 spin_unlock_bh(&cp->cnic_ulp_lock);
 846                 return -EAGAIN;
 847         }
 848
 849         cp->cnic_local_flags &= ~CNIC_LCL_FL_KWQ_INIT;
 850
 851         prod = cp->kwq_prod_idx;
 852         sw_prod = prod & MAX_KWQ_IDX;
 853         for (i = 0; i < num_wqes; i++) {
 854                 prod_qe = &cp->kwq[KWQ_PG(sw_prod)][KWQ_IDX(sw_prod)];
 855                 memcpy(prod_qe, wqes[i], sizeof(struct kwqe));
 856                 prod++;
 857                 sw_prod = prod & MAX_KWQ_IDX;
 858         }
 859         cp->kwq_prod_idx = prod;
 860
 861         CNIC_WR16(dev, cp->kwq_io_addr, cp->kwq_prod_idx);
 862
 863         spin_unlock_bh(&cp->cnic_ulp_lock);
 864         return 0;
 865 }
 866
 867 static void service_kcqes(struct cnic_dev *dev, int num_cqes)
 868 {
 869         struct cnic_local *cp = dev->cnic_priv;
 870         int i, j;
 871
 872         i = 0;
 873         j = 1;
 874         while (num_cqes) {
 875                 struct cnic_ulp_ops *ulp_ops;
 876                 int ulp_type;
 877                 u32 kcqe_op_flag = cp->completed_kcq[i]->kcqe_op_flag;
 878                 u32 kcqe_layer = kcqe_op_flag & KCQE_FLAGS_LAYER_MASK;
 879
 880                 if (unlikely(kcqe_op_flag & KCQE_RAMROD_COMPLETION))
 881                         cnic_kwq_completion(dev, 1);
 882
 883                 while (j < num_cqes) {
 884                         u32 next_op = cp->completed_kcq[i + j]->kcqe_op_flag;
 885
 886                         if ((next_op & KCQE_FLAGS_LAYER_MASK) != kcqe_layer)
 887                                 break;
 888
 889                         if (unlikely(next_op & KCQE_RAMROD_COMPLETION))
 890                                 cnic_kwq_completion(dev, 1);
 891                         j++;
 892                 }
 893
 894                 if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_RDMA)
 895                         ulp_type = CNIC_ULP_RDMA;
 896                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_ISCSI)
 897                         ulp_type = CNIC_ULP_ISCSI;
 898                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L4)
 899                         ulp_type = CNIC_ULP_L4;
 900                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L2)
 901                         goto end;
 902                 else {
 903                         printk(KERN_ERR PFX "%s: Unknown type of KCQE(0x%x)\n",
 904                                dev->netdev->name, kcqe_op_flag);
 905                         goto end;
 906                 }
 907
 908                 rcu_read_lock();
 909                 ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
 910                 if (likely(ulp_ops)) {
 911                         ulp_ops->indicate_kcqes(cp->ulp_handle[ulp_type],
 912                                                   cp->completed_kcq + i, j);
 913                 }
 914                 rcu_read_unlock();
 915 end:
 916                 num_cqes -= j;
 917                 i += j;
 918                 j = 1;
 919         }
 920         return;
 921 }
 922
 923 static u16 cnic_bnx2_next_idx(u16 idx)
 924 {
 925         return idx + 1;
 926 }
 927
 928 static u16 cnic_bnx2_hw_idx(u16 idx)
 929 {
 930         return idx;
 931 }
 932
 933 static int cnic_get_kcqes(struct cnic_dev *dev, u16 hw_prod, u16 *sw_prod)
 934 {
 935         struct cnic_local *cp = dev->cnic_priv;
 936         u16 i, ri, last;
 937         struct kcqe *kcqe;
 938         int kcqe_cnt = 0, last_cnt = 0;
 939
 940         i = ri = last = *sw_prod;
 941         ri &= MAX_KCQ_IDX;
 942
 943         while ((i != hw_prod) && (kcqe_cnt < MAX_COMPLETED_KCQE)) {
 944                 kcqe = &cp->kcq[KCQ_PG(ri)][KCQ_IDX(ri)];
 945                 cp->completed_kcq[kcqe_cnt++] = kcqe;
 946                 i = cp->next_idx(i);
 947                 ri = i & MAX_KCQ_IDX;
 948                 if (likely(!(kcqe->kcqe_op_flag & KCQE_FLAGS_NEXT))) {
 949                         last_cnt = kcqe_cnt;
 950                         last = i;
 951                 }
 952         }
 953
 954         *sw_prod = last;
 955         return last_cnt;
 956 }
 957
 958 static void cnic_chk_bnx2_pkt_rings(struct cnic_local *cp)
 959 {
 960         u16 rx_cons = *cp->rx_cons_ptr;
 961         u16 tx_cons = *cp->tx_cons_ptr;
 962
 963         if (cp->tx_cons != tx_cons || cp->rx_cons != rx_cons) {
 964                 cp->tx_cons = tx_cons;
 965                 cp->rx_cons = rx_cons;
 966                 uio_event_notify(cp->cnic_uinfo);
 967         }
 968 }
 969
 970 static int cnic_service_bnx2(void *data, void *status_blk)
 971 {
 972         struct cnic_dev *dev = data;
 973         struct status_block *sblk = status_blk;
 974         struct cnic_local *cp = dev->cnic_priv;
 975         u32 status_idx = sblk->status_idx;
 976         u16 hw_prod, sw_prod;
 977         int kcqe_cnt;
 978
 979         if (unlikely(!test_bit(CNIC_F_CNIC_UP, &dev->flags)))
 980                 return status_idx;
 981
 982         cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
 983
 984         hw_prod = sblk->status_completion_producer_index;
 985         sw_prod = cp->kcq_prod_idx;
 986         while (sw_prod != hw_prod) {
 987                 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
 988                 if (kcqe_cnt == 0)
 989                         goto done;
 990
 991                 service_kcqes(dev, kcqe_cnt);
 992
 993                 /* Tell compiler that status_blk fields can change. */
 994                 barrier();
 995                 if (status_idx != sblk->status_idx) {
 996                         status_idx = sblk->status_idx;
 997                         cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
 998                         hw_prod = sblk->status_completion_producer_index;
 999                 } else
1000                         break;
1001         }
1002
1003 done:
1004         CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
1005
1006         cp->kcq_prod_idx = sw_prod;
1007
1008         cnic_chk_bnx2_pkt_rings(cp);
1009         return status_idx;
1010 }
1011
1012 static void cnic_service_bnx2_msix(unsigned long data)
1013 {
1014         struct cnic_dev *dev = (struct cnic_dev *) data;
1015         struct cnic_local *cp = dev->cnic_priv;
1016         struct status_block_msix *status_blk = cp->bnx2_status_blk;
1017         u32 status_idx = status_blk->status_idx;
1018         u16 hw_prod, sw_prod;
1019         int kcqe_cnt;
1020
1021         cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1022
1023         hw_prod = status_blk->status_completion_producer_index;
1024         sw_prod = cp->kcq_prod_idx;
1025         while (sw_prod != hw_prod) {
1026                 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
1027                 if (kcqe_cnt == 0)
1028                         goto done;
1029
1030                 service_kcqes(dev, kcqe_cnt);
1031
1032                 /* Tell compiler that status_blk fields can change. */
1033                 barrier();
1034                 if (status_idx != status_blk->status_idx) {
1035                         status_idx = status_blk->status_idx;
1036                         cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1037                         hw_prod = status_blk->status_completion_producer_index;
1038                 } else
1039                         break;
1040         }
1041
1042 done:
1043         CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
1044         cp->kcq_prod_idx = sw_prod;
1045
1046         cnic_chk_bnx2_pkt_rings(cp);
1047
1048         cp->last_status_idx = status_idx;
1049         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
1050                 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
1051 }
1052
1053 static irqreturn_t cnic_irq(int irq, void *dev_instance)
1054 {
1055         struct cnic_dev *dev = dev_instance;
1056         struct cnic_local *cp = dev->cnic_priv;
1057         u16 prod = cp->kcq_prod_idx & MAX_KCQ_IDX;
1058
1059         if (cp->ack_int)
1060                 cp->ack_int(dev);
1061
1062         prefetch(cp->status_blk);
1063         prefetch(&cp->kcq[KCQ_PG(prod)][KCQ_IDX(prod)]);
1064
1065         if (likely(test_bit(CNIC_F_CNIC_UP, &dev->flags)))
1066                 tasklet_schedule(&cp->cnic_irq_task);
1067
1068         return IRQ_HANDLED;
1069 }
1070
1071 static void cnic_ulp_stop(struct cnic_dev *dev)
1072 {
1073         struct cnic_local *cp = dev->cnic_priv;
1074         int if_type;
1075
1076         if (cp->cnic_uinfo)
1077                 cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
1078
1079         rcu_read_lock();
1080         for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
1081                 struct cnic_ulp_ops *ulp_ops;
1082
1083                 ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
1084                 if (!ulp_ops)
1085                         continue;
1086
1087                 if (test_and_clear_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1088                         ulp_ops->cnic_stop(cp->ulp_handle[if_type]);
1089         }
1090         rcu_read_unlock();
1091 }
1092
1093 static void cnic_ulp_start(struct cnic_dev *dev)
1094 {
1095         struct cnic_local *cp = dev->cnic_priv;
1096         int if_type;
1097
1098         rcu_read_lock();
1099         for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
1100                 struct cnic_ulp_ops *ulp_ops;
1101
1102                 ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
1103                 if (!ulp_ops || !ulp_ops->cnic_start)
1104                         continue;
1105
1106                 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1107                         ulp_ops->cnic_start(cp->ulp_handle[if_type]);
1108         }
1109         rcu_read_unlock();
1110 }
1111
1112 static int cnic_ctl(void *data, struct cnic_ctl_info *info)
1113 {
1114         struct cnic_dev *dev = data;
1115
1116         switch (info->cmd) {
1117         case CNIC_CTL_STOP_CMD:
1118                 cnic_hold(dev);
1119                 mutex_lock(&cnic_lock);
1120
1121                 cnic_ulp_stop(dev);
1122                 cnic_stop_hw(dev);
1123
1124                 mutex_unlock(&cnic_lock);
1125                 cnic_put(dev);
1126                 break;
1127         case CNIC_CTL_START_CMD:
1128                 cnic_hold(dev);
1129                 mutex_lock(&cnic_lock);
1130
1131                 if (!cnic_start_hw(dev))
1132                         cnic_ulp_start(dev);
1133
1134                 mutex_unlock(&cnic_lock);
1135                 cnic_put(dev);
1136                 break;
1137         default:
1138                 return -EINVAL;
1139         }
1140         return 0;
1141 }
1142
1143 static void cnic_ulp_init(struct cnic_dev *dev)
1144 {
1145         int i;
1146         struct cnic_local *cp = dev->cnic_priv;
1147
1148         rcu_read_lock();
1149         for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1150                 struct cnic_ulp_ops *ulp_ops;
1151
1152                 ulp_ops = rcu_dereference(cnic_ulp_tbl[i]);
1153                 if (!ulp_ops || !ulp_ops->cnic_init)
1154                         continue;
1155
1156                 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1157                         ulp_ops->cnic_init(dev);
1158
1159         }
1160         rcu_read_unlock();
1161 }
1162
1163 static void cnic_ulp_exit(struct cnic_dev *dev)
1164 {
1165         int i;
1166         struct cnic_local *cp = dev->cnic_priv;
1167
1168         rcu_read_lock();
1169         for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1170                 struct cnic_ulp_ops *ulp_ops;
1171
1172                 ulp_ops = rcu_dereference(cnic_ulp_tbl[i]);
1173                 if (!ulp_ops || !ulp_ops->cnic_exit)
1174                         continue;
1175
1176                 if (test_and_clear_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1177                         ulp_ops->cnic_exit(dev);
1178
1179         }
1180         rcu_read_unlock();
1181 }
1182
1183 static int cnic_cm_offload_pg(struct cnic_sock *csk)
1184 {
1185         struct cnic_dev *dev = csk->dev;
1186         struct l4_kwq_offload_pg *l4kwqe;
1187         struct kwqe *wqes[1];
1188
1189         l4kwqe = (struct l4_kwq_offload_pg *) &csk->kwqe1;
1190         memset(l4kwqe, 0, sizeof(*l4kwqe));
1191         wqes[0] = (struct kwqe *) l4kwqe;
1192
1193         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_OFFLOAD_PG;
1194         l4kwqe->flags =
1195                 L4_LAYER_CODE << L4_KWQ_OFFLOAD_PG_LAYER_CODE_SHIFT;
1196         l4kwqe->l2hdr_nbytes = ETH_HLEN;
1197
1198         l4kwqe->da0 = csk->ha[0];
1199         l4kwqe->da1 = csk->ha[1];
1200         l4kwqe->da2 = csk->ha[2];
1201         l4kwqe->da3 = csk->ha[3];
1202         l4kwqe->da4 = csk->ha[4];
1203         l4kwqe->da5 = csk->ha[5];
1204
1205         l4kwqe->sa0 = dev->mac_addr[0];
1206         l4kwqe->sa1 = dev->mac_addr[1];
1207         l4kwqe->sa2 = dev->mac_addr[2];
1208         l4kwqe->sa3 = dev->mac_addr[3];
1209         l4kwqe->sa4 = dev->mac_addr[4];
1210         l4kwqe->sa5 = dev->mac_addr[5];
1211
1212         l4kwqe->etype = ETH_P_IP;
1213         l4kwqe->ipid_count = DEF_IPID_COUNT;
1214         l4kwqe->host_opaque = csk->l5_cid;
1215
1216         if (csk->vlan_id) {
1217                 l4kwqe->pg_flags |= L4_KWQ_OFFLOAD_PG_VLAN_TAGGING;
1218                 l4kwqe->vlan_tag = csk->vlan_id;
1219                 l4kwqe->l2hdr_nbytes += 4;
1220         }
1221
1222         return dev->submit_kwqes(dev, wqes, 1);
1223 }
1224
1225 static int cnic_cm_update_pg(struct cnic_sock *csk)
1226 {
1227         struct cnic_dev *dev = csk->dev;
1228         struct l4_kwq_update_pg *l4kwqe;
1229         struct kwqe *wqes[1];
1230
1231         l4kwqe = (struct l4_kwq_update_pg *) &csk->kwqe1;
1232         memset(l4kwqe, 0, sizeof(*l4kwqe));
1233         wqes[0] = (struct kwqe *) l4kwqe;
1234
1235         l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPDATE_PG;
1236         l4kwqe->flags =
1237                 L4_LAYER_CODE << L4_KWQ_UPDATE_PG_LAYER_CODE_SHIFT;
1238         l4kwqe->pg_cid = csk->pg_cid;
1239
1240         l4kwqe->da0 = csk->ha[0];
1241         l4kwqe->da1 = csk->ha[1];
1242         l4kwqe->da2 = csk->ha[2];
1243         l4kwqe->da3 = csk->ha[3];
1244         l4kwqe->da4 = csk->ha[4];
1245         l4kwqe->da5 = csk->ha[5];
1246
1247         l4kwqe->pg_host_opaque = csk->l5_cid;
1248         l4kwqe->pg_valids = L4_KWQ_UPDATE_PG_VALIDS_DA;
1249
1250         return dev->submit_kwqes(dev, wqes, 1);
1251 }
1252
1253 static int cnic_cm_upload_pg(struct cnic_sock *csk)
1254 {
1255         struct cnic_dev *dev = csk->dev;
1256         struct l4_kwq_upload *l4kwqe;
1257         struct kwqe *wqes[1];
1258
1259         l4kwqe = (struct l4_kwq_upload *) &csk->kwqe1;
1260         memset(l4kwqe, 0, sizeof(*l4kwqe));
1261         wqes[0] = (struct kwqe *) l4kwqe;
1262
1263         l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPLOAD_PG;
1264         l4kwqe->flags =
1265                 L4_LAYER_CODE << L4_KWQ_UPLOAD_LAYER_CODE_SHIFT;
1266         l4kwqe->cid = csk->pg_cid;
1267
1268         return dev->submit_kwqes(dev, wqes, 1);
1269 }
1270
1271 static int cnic_cm_conn_req(struct cnic_sock *csk)
1272 {
1273         struct cnic_dev *dev = csk->dev;
1274         struct l4_kwq_connect_req1 *l4kwqe1;
1275         struct l4_kwq_connect_req2 *l4kwqe2;
1276         struct l4_kwq_connect_req3 *l4kwqe3;
1277         struct kwqe *wqes[3];
1278         u8 tcp_flags = 0;
1279         int num_wqes = 2;
1280
1281         l4kwqe1 = (struct l4_kwq_connect_req1 *) &csk->kwqe1;
1282         l4kwqe2 = (struct l4_kwq_connect_req2 *) &csk->kwqe2;
1283         l4kwqe3 = (struct l4_kwq_connect_req3 *) &csk->kwqe3;
1284         memset(l4kwqe1, 0, sizeof(*l4kwqe1));
1285         memset(l4kwqe2, 0, sizeof(*l4kwqe2));
1286         memset(l4kwqe3, 0, sizeof(*l4kwqe3));
1287
1288         l4kwqe3->op_code = L4_KWQE_OPCODE_VALUE_CONNECT3;
1289         l4kwqe3->flags =
1290                 L4_LAYER_CODE << L4_KWQ_CONNECT_REQ3_LAYER_CODE_SHIFT;
1291         l4kwqe3->ka_timeout = csk->ka_timeout;
1292         l4kwqe3->ka_interval = csk->ka_interval;
1293         l4kwqe3->ka_max_probe_count = csk->ka_max_probe_count;
1294         l4kwqe3->tos = csk->tos;
1295         l4kwqe3->ttl = csk->ttl;
1296         l4kwqe3->snd_seq_scale = csk->snd_seq_scale;
1297         l4kwqe3->pmtu = csk->mtu;
1298         l4kwqe3->rcv_buf = csk->rcv_buf;
1299         l4kwqe3->snd_buf = csk->snd_buf;
1300         l4kwqe3->seed = csk->seed;
1301
1302         wqes[0] = (struct kwqe *) l4kwqe1;
1303         if (test_bit(SK_F_IPV6, &csk->flags)) {
1304                 wqes[1] = (struct kwqe *) l4kwqe2;
1305                 wqes[2] = (struct kwqe *) l4kwqe3;
1306                 num_wqes = 3;
1307
1308                 l4kwqe1->conn_flags = L4_KWQ_CONNECT_REQ1_IP_V6;
1309                 l4kwqe2->op_code = L4_KWQE_OPCODE_VALUE_CONNECT2;
1310                 l4kwqe2->flags =
1311                         L4_KWQ_CONNECT_REQ2_LINKED_WITH_NEXT |
1312                         L4_LAYER_CODE << L4_KWQ_CONNECT_REQ2_LAYER_CODE_SHIFT;
1313                 l4kwqe2->src_ip_v6_2 = be32_to_cpu(csk->src_ip[1]);
1314                 l4kwqe2->src_ip_v6_3 = be32_to_cpu(csk->src_ip[2]);
1315                 l4kwqe2->src_ip_v6_4 = be32_to_cpu(csk->src_ip[3]);
1316                 l4kwqe2->dst_ip_v6_2 = be32_to_cpu(csk->dst_ip[1]);
1317                 l4kwqe2->dst_ip_v6_3 = be32_to_cpu(csk->dst_ip[2]);
1318                 l4kwqe2->dst_ip_v6_4 = be32_to_cpu(csk->dst_ip[3]);
1319                 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct ipv6hdr) -
1320                                sizeof(struct tcphdr);
1321         } else {
1322                 wqes[1] = (struct kwqe *) l4kwqe3;
1323                 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct iphdr) -
1324                                sizeof(struct tcphdr);
1325         }
1326
1327         l4kwqe1->op_code = L4_KWQE_OPCODE_VALUE_CONNECT1;
1328         l4kwqe1->flags =
1329                 (L4_LAYER_CODE << L4_KWQ_CONNECT_REQ1_LAYER_CODE_SHIFT) |
1330                  L4_KWQ_CONNECT_REQ3_LINKED_WITH_NEXT;
1331         l4kwqe1->cid = csk->cid;
1332         l4kwqe1->pg_cid = csk->pg_cid;
1333         l4kwqe1->src_ip = be32_to_cpu(csk->src_ip[0]);
1334         l4kwqe1->dst_ip = be32_to_cpu(csk->dst_ip[0]);
1335         l4kwqe1->src_port = be16_to_cpu(csk->src_port);
1336         l4kwqe1->dst_port = be16_to_cpu(csk->dst_port);
1337         if (csk->tcp_flags & SK_TCP_NO_DELAY_ACK)
1338                 tcp_flags |= L4_KWQ_CONNECT_REQ1_NO_DELAY_ACK;
1339         if (csk->tcp_flags & SK_TCP_KEEP_ALIVE)
1340                 tcp_flags |= L4_KWQ_CONNECT_REQ1_KEEP_ALIVE;
1341         if (csk->tcp_flags & SK_TCP_NAGLE)
1342                 tcp_flags |= L4_KWQ_CONNECT_REQ1_NAGLE_ENABLE;
1343         if (csk->tcp_flags & SK_TCP_TIMESTAMP)
1344                 tcp_flags |= L4_KWQ_CONNECT_REQ1_TIME_STAMP;
1345         if (csk->tcp_flags & SK_TCP_SACK)
1346                 tcp_flags |= L4_KWQ_CONNECT_REQ1_SACK;
1347         if (csk->tcp_flags & SK_TCP_SEG_SCALING)
1348                 tcp_flags |= L4_KWQ_CONNECT_REQ1_SEG_SCALING;
1349
1350         l4kwqe1->tcp_flags = tcp_flags;
1351
1352         return dev->submit_kwqes(dev, wqes, num_wqes);
1353 }
1354
1355 static int cnic_cm_close_req(struct cnic_sock *csk)
1356 {
1357         struct cnic_dev *dev = csk->dev;
1358         struct l4_kwq_close_req *l4kwqe;
1359         struct kwqe *wqes[1];
1360
1361         l4kwqe = (struct l4_kwq_close_req *) &csk->kwqe2;
1362         memset(l4kwqe, 0, sizeof(*l4kwqe));
1363         wqes[0] = (struct kwqe *) l4kwqe;
1364
1365         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_CLOSE;
1366         l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_CLOSE_REQ_LAYER_CODE_SHIFT;
1367         l4kwqe->cid = csk->cid;
1368
1369         return dev->submit_kwqes(dev, wqes, 1);
1370 }
1371
1372 static int cnic_cm_abort_req(struct cnic_sock *csk)
1373 {
1374         struct cnic_dev *dev = csk->dev;
1375         struct l4_kwq_reset_req *l4kwqe;
1376         struct kwqe *wqes[1];
1377
1378         l4kwqe = (struct l4_kwq_reset_req *) &csk->kwqe2;
1379         memset(l4kwqe, 0, sizeof(*l4kwqe));
1380         wqes[0] = (struct kwqe *) l4kwqe;
1381
1382         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_RESET;
1383         l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_RESET_REQ_LAYER_CODE_SHIFT;
1384         l4kwqe->cid = csk->cid;
1385
1386         return dev->submit_kwqes(dev, wqes, 1);
1387 }
1388
1389 static int cnic_cm_create(struct cnic_dev *dev, int ulp_type, u32 cid,
1390                           u32 l5_cid, struct cnic_sock **csk, void *context)
1391 {
1392         struct cnic_local *cp = dev->cnic_priv;
1393         struct cnic_sock *csk1;
1394
1395         if (l5_cid >= MAX_CM_SK_TBL_SZ)
1396                 return -EINVAL;
1397
1398         csk1 = &cp->csk_tbl[l5_cid];
1399         if (atomic_read(&csk1->ref_count))
1400                 return -EAGAIN;
1401
1402         if (test_and_set_bit(SK_F_INUSE, &csk1->flags))
1403                 return -EBUSY;
1404
1405         csk1->dev = dev;
1406         csk1->cid = cid;
1407         csk1->l5_cid = l5_cid;
1408         csk1->ulp_type = ulp_type;
1409         csk1->context = context;
1410
1411         csk1->ka_timeout = DEF_KA_TIMEOUT;
1412         csk1->ka_interval = DEF_KA_INTERVAL;
1413         csk1->ka_max_probe_count = DEF_KA_MAX_PROBE_COUNT;
1414         csk1->tos = DEF_TOS;
1415         csk1->ttl = DEF_TTL;
1416         csk1->snd_seq_scale = DEF_SND_SEQ_SCALE;
1417         csk1->rcv_buf = DEF_RCV_BUF;
1418         csk1->snd_buf = DEF_SND_BUF;
1419         csk1->seed = DEF_SEED;
1420
1421         *csk = csk1;
1422         return 0;
1423 }
1424
1425 static void cnic_cm_cleanup(struct cnic_sock *csk)
1426 {
1427         if (csk->src_port) {
1428                 struct cnic_dev *dev = csk->dev;
1429                 struct cnic_local *cp = dev->cnic_priv;
1430
1431                 cnic_free_id(&cp->csk_port_tbl, csk->src_port);
1432                 csk->src_port = 0;
1433         }
1434 }
1435
1436 static void cnic_close_conn(struct cnic_sock *csk)
1437 {
1438         if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags)) {
1439                 cnic_cm_upload_pg(csk);
1440                 clear_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1441         }
1442         cnic_cm_cleanup(csk);
1443 }
1444
1445 static int cnic_cm_destroy(struct cnic_sock *csk)
1446 {
1447         if (!cnic_in_use(csk))
1448                 return -EINVAL;
1449
1450         csk_hold(csk);
1451         clear_bit(SK_F_INUSE, &csk->flags);
1452         smp_mb__after_clear_bit();
1453         while (atomic_read(&csk->ref_count) != 1)
1454                 msleep(1);
1455         cnic_cm_cleanup(csk);
1456
1457         csk->flags = 0;
1458         csk_put(csk);
1459         return 0;
1460 }
1461
1462 static inline u16 cnic_get_vlan(struct net_device *dev,
1463                                 struct net_device **vlan_dev)
1464 {
1465         if (dev->priv_flags & IFF_802_1Q_VLAN) {
1466                 *vlan_dev = vlan_dev_real_dev(dev);
1467                 return vlan_dev_vlan_id(dev);
1468         }
1469         *vlan_dev = dev;
1470         return 0;
1471 }
1472
1473 static int cnic_get_v4_route(struct sockaddr_in *dst_addr,
1474                              struct dst_entry **dst)
1475 {
1476 #if defined(CONFIG_INET)
1477         struct flowi fl;
1478         int err;
1479         struct rtable *rt;
1480
1481         memset(&fl, 0, sizeof(fl));
1482         fl.nl_u.ip4_u.daddr = dst_addr->sin_addr.s_addr;
1483
1484         err = ip_route_output_key(&init_net, &rt, &fl);
1485         if (!err)
1486                 *dst = &rt->u.dst;
1487         return err;
1488 #else
1489         return -ENETUNREACH;
1490 #endif
1491 }
1492
1493 static int cnic_get_v6_route(struct sockaddr_in6 *dst_addr,
1494                              struct dst_entry **dst)
1495 {
1496 #if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
1497         struct flowi fl;
1498
1499         memset(&fl, 0, sizeof(fl));
1500         ipv6_addr_copy(&fl.fl6_dst, &dst_addr->sin6_addr);
1501         if (ipv6_addr_type(&fl.fl6_dst) & IPV6_ADDR_LINKLOCAL)
1502                 fl.oif = dst_addr->sin6_scope_id;
1503
1504         *dst = ip6_route_output(&init_net, NULL, &fl);
1505         if (*dst)
1506                 return 0;
1507 #endif
1508
1509         return -ENETUNREACH;
1510 }
1511
1512 static struct cnic_dev *cnic_cm_select_dev(struct sockaddr_in *dst_addr,
1513                                            int ulp_type)
1514 {
1515         struct cnic_dev *dev = NULL;
1516         struct dst_entry *dst;
1517         struct net_device *netdev = NULL;
1518         int err = -ENETUNREACH;
1519
1520         if (dst_addr->sin_family == AF_INET)
1521                 err = cnic_get_v4_route(dst_addr, &dst);
1522         else if (dst_addr->sin_family == AF_INET6) {
1523                 struct sockaddr_in6 *dst_addr6 =
1524                         (struct sockaddr_in6 *) dst_addr;
1525
1526                 err = cnic_get_v6_route(dst_addr6, &dst);
1527         } else
1528                 return NULL;
1529
1530         if (err)
1531                 return NULL;
1532
1533         if (!dst->dev)
1534                 goto done;
1535
1536         cnic_get_vlan(dst->dev, &netdev);
1537
1538         dev = cnic_from_netdev(netdev);
1539
1540 done:
1541         dst_release(dst);
1542         if (dev)
1543                 cnic_put(dev);
1544         return dev;
1545 }
1546
1547 static int cnic_resolve_addr(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1548 {
1549         struct cnic_dev *dev = csk->dev;
1550         struct cnic_local *cp = dev->cnic_priv;
1551
1552         return cnic_send_nlmsg(cp, ISCSI_KEVENT_PATH_REQ, csk);
1553 }
1554
1555 static int cnic_get_route(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1556 {
1557         struct cnic_dev *dev = csk->dev;
1558         struct cnic_local *cp = dev->cnic_priv;
1559         int is_v6, err, rc = -ENETUNREACH;
1560         struct dst_entry *dst;
1561         struct net_device *realdev;
1562         u32 local_port;
1563
1564         if (saddr->local.v6.sin6_family == AF_INET6 &&
1565             saddr->remote.v6.sin6_family == AF_INET6)
1566                 is_v6 = 1;
1567         else if (saddr->local.v4.sin_family == AF_INET &&
1568                  saddr->remote.v4.sin_family == AF_INET)
1569                 is_v6 = 0;
1570         else
1571                 return -EINVAL;
1572
1573         clear_bit(SK_F_IPV6, &csk->flags);
1574
1575         if (is_v6) {
1576 #if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
1577                 set_bit(SK_F_IPV6, &csk->flags);
1578                 err = cnic_get_v6_route(&saddr->remote.v6, &dst);
1579                 if (err)
1580                         return err;
1581
1582                 if (!dst || dst->error || !dst->dev)
1583                         goto err_out;
1584
1585                 memcpy(&csk->dst_ip[0], &saddr->remote.v6.sin6_addr,
1586                        sizeof(struct in6_addr));
1587                 csk->dst_port = saddr->remote.v6.sin6_port;
1588                 local_port = saddr->local.v6.sin6_port;
1589 #else
1590                 return rc;
1591 #endif
1592
1593         } else {
1594                 err = cnic_get_v4_route(&saddr->remote.v4, &dst);
1595                 if (err)
1596                         return err;
1597
1598                 if (!dst || dst->error || !dst->dev)
1599                         goto err_out;
1600
1601                 csk->dst_ip[0] = saddr->remote.v4.sin_addr.s_addr;
1602                 csk->dst_port = saddr->remote.v4.sin_port;
1603                 local_port = saddr->local.v4.sin_port;
1604         }
1605
1606         csk->vlan_id = cnic_get_vlan(dst->dev, &realdev);
1607         if (realdev != dev->netdev)
1608                 goto err_out;
1609
1610         if (local_port >= CNIC_LOCAL_PORT_MIN &&
1611             local_port < CNIC_LOCAL_PORT_MAX) {
1612                 if (cnic_alloc_id(&cp->csk_port_tbl, local_port))
1613                         local_port = 0;
1614         } else
1615                 local_port = 0;
1616
1617         if (!local_port) {
1618                 local_port = cnic_alloc_new_id(&cp->csk_port_tbl);
1619                 if (local_port == -1) {
1620                         rc = -ENOMEM;
1621                         goto err_out;
1622                 }
1623         }
1624         csk->src_port = local_port;
1625
1626         csk->mtu = dst_mtu(dst);
1627         rc = 0;
1628
1629 err_out:
1630         dst_release(dst);
1631         return rc;
1632 }
1633
1634 static void cnic_init_csk_state(struct cnic_sock *csk)
1635 {
1636         csk->state = 0;
1637         clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1638         clear_bit(SK_F_CLOSING, &csk->flags);
1639 }
1640
1641 static int cnic_cm_connect(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1642 {
1643         int err = 0;
1644
1645         if (!cnic_in_use(csk))
1646                 return -EINVAL;
1647
1648         if (test_and_set_bit(SK_F_CONNECT_START, &csk->flags))
1649                 return -EINVAL;
1650
1651         cnic_init_csk_state(csk);
1652
1653         err = cnic_get_route(csk, saddr);
1654         if (err)
1655                 goto err_out;
1656
1657         err = cnic_resolve_addr(csk, saddr);
1658         if (!err)
1659                 return 0;
1660
1661 err_out:
1662         clear_bit(SK_F_CONNECT_START, &csk->flags);
1663         return err;
1664 }
1665
1666 static int cnic_cm_abort(struct cnic_sock *csk)
1667 {
1668         struct cnic_local *cp = csk->dev->cnic_priv;
1669         u32 opcode;
1670
1671         if (!cnic_in_use(csk))
1672                 return -EINVAL;
1673
1674         if (cnic_abort_prep(csk))
1675                 return cnic_cm_abort_req(csk);
1676
1677         /* Getting here means that we haven't started connect, or
1678          * connect was not successful.
1679          */
1680
1681         csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
1682         if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1683                 opcode = csk->state;
1684         else
1685                 opcode = L5CM_RAMROD_CMD_ID_TERMINATE_OFFLOAD;
1686         cp->close_conn(csk, opcode);
1687
1688         return 0;
1689 }
1690
1691 static int cnic_cm_close(struct cnic_sock *csk)
1692 {
1693         if (!cnic_in_use(csk))
1694                 return -EINVAL;
1695
1696         if (cnic_close_prep(csk)) {
1697                 csk->state = L4_KCQE_OPCODE_VALUE_CLOSE_COMP;
1698                 return cnic_cm_close_req(csk);
1699         }
1700         return 0;
1701 }
1702
1703 static void cnic_cm_upcall(struct cnic_local *cp, struct cnic_sock *csk,
1704                            u8 opcode)
1705 {
1706         struct cnic_ulp_ops *ulp_ops;
1707         int ulp_type = csk->ulp_type;
1708
1709         rcu_read_lock();
1710         ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
1711         if (ulp_ops) {
1712                 if (opcode == L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE)
1713                         ulp_ops->cm_connect_complete(csk);
1714                 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)
1715                         ulp_ops->cm_close_complete(csk);
1716                 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED)
1717                         ulp_ops->cm_remote_abort(csk);
1718                 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_COMP)
1719                         ulp_ops->cm_abort_complete(csk);
1720                 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED)
1721                         ulp_ops->cm_remote_close(csk);
1722         }
1723         rcu_read_unlock();
1724 }
1725
1726 static int cnic_cm_set_pg(struct cnic_sock *csk)
1727 {
1728         if (cnic_offld_prep(csk)) {
1729                 if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1730                         cnic_cm_update_pg(csk);
1731                 else
1732                         cnic_cm_offload_pg(csk);
1733         }
1734         return 0;
1735 }
1736
1737 static void cnic_cm_process_offld_pg(struct cnic_dev *dev, struct l4_kcq *kcqe)
1738 {
1739         struct cnic_local *cp = dev->cnic_priv;
1740         u32 l5_cid = kcqe->pg_host_opaque;
1741         u8 opcode = kcqe->op_code;
1742         struct cnic_sock *csk = &cp->csk_tbl[l5_cid];
1743
1744         csk_hold(csk);
1745         if (!cnic_in_use(csk))
1746                 goto done;
1747
1748         if (opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1749                 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1750                 goto done;
1751         }
1752         csk->pg_cid = kcqe->pg_cid;
1753         set_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1754         cnic_cm_conn_req(csk);
1755
1756 done:
1757         csk_put(csk);
1758 }
1759
1760 static void cnic_cm_process_kcqe(struct cnic_dev *dev, struct kcqe *kcqe)
1761 {
1762         struct cnic_local *cp = dev->cnic_priv;
1763         struct l4_kcq *l4kcqe = (struct l4_kcq *) kcqe;
1764         u8 opcode = l4kcqe->op_code;
1765         u32 l5_cid;
1766         struct cnic_sock *csk;
1767
1768         if (opcode == L4_KCQE_OPCODE_VALUE_OFFLOAD_PG ||
1769             opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1770                 cnic_cm_process_offld_pg(dev, l4kcqe);
1771                 return;
1772         }
1773
1774         l5_cid = l4kcqe->conn_id;
1775         if (opcode & 0x80)
1776                 l5_cid = l4kcqe->cid;
1777         if (l5_cid >= MAX_CM_SK_TBL_SZ)
1778                 return;
1779
1780         csk = &cp->csk_tbl[l5_cid];
1781         csk_hold(csk);
1782
1783         if (!cnic_in_use(csk)) {
1784                 csk_put(csk);
1785                 return;
1786         }
1787
1788         switch (opcode) {
1789         case L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE:
1790                 if (l4kcqe->status == 0)
1791                         set_bit(SK_F_OFFLD_COMPLETE, &csk->flags);
1792
1793                 smp_mb__before_clear_bit();
1794                 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1795                 cnic_cm_upcall(cp, csk, opcode);
1796                 break;
1797
1798         case L4_KCQE_OPCODE_VALUE_RESET_RECEIVED:
1799                 if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags))
1800                         csk->state = opcode;
1801                 /* fall through */
1802         case L4_KCQE_OPCODE_VALUE_CLOSE_COMP:
1803         case L4_KCQE_OPCODE_VALUE_RESET_COMP:
1804                 cp->close_conn(csk, opcode);
1805                 break;
1806
1807         case L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED:
1808                 cnic_cm_upcall(cp, csk, opcode);
1809                 break;
1810         }
1811         csk_put(csk);
1812 }
1813
1814 static void cnic_cm_indicate_kcqe(void *data, struct kcqe *kcqe[], u32 num)
1815 {
1816         struct cnic_dev *dev = data;
1817         int i;
1818
1819         for (i = 0; i < num; i++)
1820                 cnic_cm_process_kcqe(dev, kcqe[i]);
1821 }
1822
1823 static struct cnic_ulp_ops cm_ulp_ops = {
1824         .indicate_kcqes         = cnic_cm_indicate_kcqe,
1825 };
1826
1827 static void cnic_cm_free_mem(struct cnic_dev *dev)
1828 {
1829         struct cnic_local *cp = dev->cnic_priv;
1830
1831         kfree(cp->csk_tbl);
1832         cp->csk_tbl = NULL;
1833         cnic_free_id_tbl(&cp->csk_port_tbl);
1834 }
1835
1836 static int cnic_cm_alloc_mem(struct cnic_dev *dev)
1837 {
1838         struct cnic_local *cp = dev->cnic_priv;
1839
1840         cp->csk_tbl = kzalloc(sizeof(struct cnic_sock) * MAX_CM_SK_TBL_SZ,
1841                               GFP_KERNEL);
1842         if (!cp->csk_tbl)
1843                 return -ENOMEM;
1844
1845         if (cnic_init_id_tbl(&cp->csk_port_tbl, CNIC_LOCAL_PORT_RANGE,
1846                              CNIC_LOCAL_PORT_MIN)) {
1847                 cnic_cm_free_mem(dev);
1848                 return -ENOMEM;
1849         }
1850         return 0;
1851 }
1852
1853 static int cnic_ready_to_close(struct cnic_sock *csk, u32 opcode)
1854 {
1855         if ((opcode == csk->state) ||
1856             (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED &&
1857              csk->state == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)) {
1858                 if (!test_and_set_bit(SK_F_CLOSING, &csk->flags))
1859                         return 1;
1860         }
1861         return 0;
1862 }
1863
1864 static void cnic_close_bnx2_conn(struct cnic_sock *csk, u32 opcode)
1865 {
1866         struct cnic_dev *dev = csk->dev;
1867         struct cnic_local *cp = dev->cnic_priv;
1868
1869         clear_bit(SK_F_CONNECT_START, &csk->flags);
1870         if (cnic_ready_to_close(csk, opcode)) {
1871                 cnic_close_conn(csk);
1872                 cnic_cm_upcall(cp, csk, opcode);
1873         }
1874 }
1875
1876 static void cnic_cm_stop_bnx2_hw(struct cnic_dev *dev)
1877 {
1878 }
1879
1880 static int cnic_cm_init_bnx2_hw(struct cnic_dev *dev)
1881 {
1882         u32 seed;
1883
1884         get_random_bytes(&seed, 4);
1885         cnic_ctx_wr(dev, 45, 0, seed);
1886         return 0;
1887 }
1888
1889 static int cnic_cm_open(struct cnic_dev *dev)
1890 {
1891         struct cnic_local *cp = dev->cnic_priv;
1892         int err;
1893
1894         err = cnic_cm_alloc_mem(dev);
1895         if (err)
1896                 return err;
1897
1898         err = cp->start_cm(dev);
1899
1900         if (err)
1901                 goto err_out;
1902
1903         dev->cm_create = cnic_cm_create;
1904         dev->cm_destroy = cnic_cm_destroy;
1905         dev->cm_connect = cnic_cm_connect;
1906         dev->cm_abort = cnic_cm_abort;
1907         dev->cm_close = cnic_cm_close;
1908         dev->cm_select_dev = cnic_cm_select_dev;
1909
1910         cp->ulp_handle[CNIC_ULP_L4] = dev;
1911         rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], &cm_ulp_ops);
1912         return 0;
1913
1914 err_out:
1915         cnic_cm_free_mem(dev);
1916         return err;
1917 }
1918
1919 static int cnic_cm_shutdown(struct cnic_dev *dev)
1920 {
1921         struct cnic_local *cp = dev->cnic_priv;
1922         int i;
1923
1924         cp->stop_cm(dev);
1925
1926         if (!cp->csk_tbl)
1927                 return 0;
1928
1929         for (i = 0; i < MAX_CM_SK_TBL_SZ; i++) {
1930                 struct cnic_sock *csk = &cp->csk_tbl[i];
1931
1932                 clear_bit(SK_F_INUSE, &csk->flags);
1933                 cnic_cm_cleanup(csk);
1934         }
1935         cnic_cm_free_mem(dev);
1936
1937         return 0;
1938 }
1939
1940 static void cnic_init_context(struct cnic_dev *dev, u32 cid)
1941 {
1942         struct cnic_local *cp = dev->cnic_priv;
1943         u32 cid_addr;
1944         int i;
1945
1946         if (CHIP_NUM(cp) == CHIP_NUM_5709)
1947                 return;
1948
1949         cid_addr = GET_CID_ADDR(cid);
1950
1951         for (i = 0; i < CTX_SIZE; i += 4)
1952                 cnic_ctx_wr(dev, cid_addr, i, 0);
1953 }
1954
1955 static int cnic_setup_5709_context(struct cnic_dev *dev, int valid)
1956 {
1957         struct cnic_local *cp = dev->cnic_priv;
1958         int ret = 0, i;
1959         u32 valid_bit = valid ? BNX2_CTX_HOST_PAGE_TBL_DATA0_VALID : 0;
1960
1961         if (CHIP_NUM(cp) != CHIP_NUM_5709)
1962                 return 0;
1963
1964         for (i = 0; i < cp->ctx_blks; i++) {
1965                 int j;
1966                 u32 idx = cp->ctx_arr[i].cid / cp->cids_per_blk;
1967                 u32 val;
1968
1969                 memset(cp->ctx_arr[i].ctx, 0, BCM_PAGE_SIZE);
1970
1971                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA0,
1972                         (cp->ctx_arr[i].mapping & 0xffffffff) | valid_bit);
1973                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA1,
1974                         (u64) cp->ctx_arr[i].mapping >> 32);
1975                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL, idx |
1976                         BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ);
1977                 for (j = 0; j < 10; j++) {
1978
1979                         val = CNIC_RD(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL);
1980                         if (!(val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ))
1981                                 break;
1982                         udelay(5);
1983                 }
1984                 if (val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ) {
1985                         ret = -EBUSY;
1986                         break;
1987                 }
1988         }
1989         return ret;
1990 }
1991
1992 static void cnic_free_irq(struct cnic_dev *dev)
1993 {
1994         struct cnic_local *cp = dev->cnic_priv;
1995         struct cnic_eth_dev *ethdev = cp->ethdev;
1996
1997         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
1998                 cp->disable_int_sync(dev);
1999                 tasklet_disable(&cp->cnic_irq_task);
2000                 free_irq(ethdev->irq_arr[0].vector, dev);
2001         }
2002 }
2003
2004 static int cnic_init_bnx2_irq(struct cnic_dev *dev)
2005 {
2006         struct cnic_local *cp = dev->cnic_priv;
2007         struct cnic_eth_dev *ethdev = cp->ethdev;
2008
2009         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2010                 int err, i = 0;
2011                 int sblk_num = cp->status_blk_num;
2012                 u32 base = ((sblk_num - 1) * BNX2_HC_SB_CONFIG_SIZE) +
2013                            BNX2_HC_SB_CONFIG_1;
2014
2015                 CNIC_WR(dev, base, BNX2_HC_SB_CONFIG_1_ONE_SHOT);
2016
2017                 CNIC_WR(dev, base + BNX2_HC_COMP_PROD_TRIP_OFF, (2 << 16) | 8);
2018                 CNIC_WR(dev, base + BNX2_HC_COM_TICKS_OFF, (64 << 16) | 220);
2019                 CNIC_WR(dev, base + BNX2_HC_CMD_TICKS_OFF, (64 << 16) | 220);
2020
2021                 cp->bnx2_status_blk = cp->status_blk;
2022                 cp->last_status_idx = cp->bnx2_status_blk->status_idx;
2023                 tasklet_init(&cp->cnic_irq_task, &cnic_service_bnx2_msix,
2024                              (unsigned long) dev);
2025                 err = request_irq(ethdev->irq_arr[0].vector, cnic_irq, 0,
2026                                   "cnic", dev);
2027                 if (err) {
2028                         tasklet_disable(&cp->cnic_irq_task);
2029                         return err;
2030                 }
2031                 while (cp->bnx2_status_blk->status_completion_producer_index &&
2032                        i < 10) {
2033                         CNIC_WR(dev, BNX2_HC_COALESCE_NOW,
2034                                 1 << (11 + sblk_num));
2035                         udelay(10);
2036                         i++;
2037                         barrier();
2038                 }
2039                 if (cp->bnx2_status_blk->status_completion_producer_index) {
2040                         cnic_free_irq(dev);
2041                         goto failed;
2042                 }
2043
2044         } else {
2045                 struct status_block *sblk = cp->status_blk;
2046                 u32 hc_cmd = CNIC_RD(dev, BNX2_HC_COMMAND);
2047                 int i = 0;
2048
2049                 while (sblk->status_completion_producer_index && i < 10) {
2050                         CNIC_WR(dev, BNX2_HC_COMMAND,
2051                                 hc_cmd | BNX2_HC_COMMAND_COAL_NOW_WO_INT);
2052                         udelay(10);
2053                         i++;
2054                         barrier();
2055                 }
2056                 if (sblk->status_completion_producer_index)
2057                         goto failed;
2058
2059         }
2060         return 0;
2061
2062 failed:
2063         printk(KERN_ERR PFX "%s: " "KCQ index not resetting to 0.\n",
2064                dev->netdev->name);
2065         return -EBUSY;
2066 }
2067
2068 static void cnic_enable_bnx2_int(struct cnic_dev *dev)
2069 {
2070         struct cnic_local *cp = dev->cnic_priv;
2071         struct cnic_eth_dev *ethdev = cp->ethdev;
2072
2073         if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
2074                 return;
2075
2076         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2077                 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
2078 }
2079
2080 static void cnic_disable_bnx2_int_sync(struct cnic_dev *dev)
2081 {
2082         struct cnic_local *cp = dev->cnic_priv;
2083         struct cnic_eth_dev *ethdev = cp->ethdev;
2084
2085         if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
2086                 return;
2087
2088         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2089                 BNX2_PCICFG_INT_ACK_CMD_MASK_INT);
2090         CNIC_RD(dev, BNX2_PCICFG_INT_ACK_CMD);
2091         synchronize_irq(ethdev->irq_arr[0].vector);
2092 }
2093
2094 static void cnic_init_bnx2_tx_ring(struct cnic_dev *dev)
2095 {
2096         struct cnic_local *cp = dev->cnic_priv;
2097         struct cnic_eth_dev *ethdev = cp->ethdev;
2098         u32 cid_addr, tx_cid, sb_id;
2099         u32 val, offset0, offset1, offset2, offset3;
2100         int i;
2101         struct tx_bd *txbd;
2102         dma_addr_t buf_map;
2103         struct status_block *s_blk = cp->status_blk;
2104
2105         sb_id = cp->status_blk_num;
2106         tx_cid = 20;
2107         cnic_init_context(dev, tx_cid);
2108         cnic_init_context(dev, tx_cid + 1);
2109         cp->tx_cons_ptr = &s_blk->status_tx_quick_consumer_index2;
2110         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2111                 struct status_block_msix *sblk = cp->status_blk;
2112
2113                 tx_cid = TX_TSS_CID + sb_id - 1;
2114                 cnic_init_context(dev, tx_cid);
2115                 CNIC_WR(dev, BNX2_TSCH_TSS_CFG, (sb_id << 24) |
2116                         (TX_TSS_CID << 7));
2117                 cp->tx_cons_ptr = &sblk->status_tx_quick_consumer_index;
2118         }
2119         cp->tx_cons = *cp->tx_cons_ptr;
2120
2121         cid_addr = GET_CID_ADDR(tx_cid);
2122         if (CHIP_NUM(cp) == CHIP_NUM_5709) {
2123                 u32 cid_addr2 = GET_CID_ADDR(tx_cid + 4) + 0x40;
2124
2125                 for (i = 0; i < PHY_CTX_SIZE; i += 4)
2126                         cnic_ctx_wr(dev, cid_addr2, i, 0);
2127
2128                 offset0 = BNX2_L2CTX_TYPE_XI;
2129                 offset1 = BNX2_L2CTX_CMD_TYPE_XI;
2130                 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI_XI;
2131                 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO_XI;
2132         } else {
2133                 offset0 = BNX2_L2CTX_TYPE;
2134                 offset1 = BNX2_L2CTX_CMD_TYPE;
2135                 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI;
2136                 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO;
2137         }
2138         val = BNX2_L2CTX_TYPE_TYPE_L2 | BNX2_L2CTX_TYPE_SIZE_L2;
2139         cnic_ctx_wr(dev, cid_addr, offset0, val);
2140
2141         val = BNX2_L2CTX_CMD_TYPE_TYPE_L2 | (8 << 16);
2142         cnic_ctx_wr(dev, cid_addr, offset1, val);
2143
2144         txbd = (struct tx_bd *) cp->l2_ring;
2145
2146         buf_map = cp->l2_buf_map;
2147         for (i = 0; i < MAX_TX_DESC_CNT; i++, txbd++) {
2148                 txbd->tx_bd_haddr_hi = (u64) buf_map >> 32;
2149                 txbd->tx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2150         }
2151         val = (u64) cp->l2_ring_map >> 32;
2152         cnic_ctx_wr(dev, cid_addr, offset2, val);
2153         txbd->tx_bd_haddr_hi = val;
2154
2155         val = (u64) cp->l2_ring_map & 0xffffffff;
2156         cnic_ctx_wr(dev, cid_addr, offset3, val);
2157         txbd->tx_bd_haddr_lo = val;
2158 }
2159
2160 static void cnic_init_bnx2_rx_ring(struct cnic_dev *dev)
2161 {
2162         struct cnic_local *cp = dev->cnic_priv;
2163         struct cnic_eth_dev *ethdev = cp->ethdev;
2164         u32 cid_addr, sb_id, val, coal_reg, coal_val;
2165         int i;
2166         struct rx_bd *rxbd;
2167         struct status_block *s_blk = cp->status_blk;
2168
2169         sb_id = cp->status_blk_num;
2170         cnic_init_context(dev, 2);
2171         cp->rx_cons_ptr = &s_blk->status_rx_quick_consumer_index2;
2172         coal_reg = BNX2_HC_COMMAND;
2173         coal_val = CNIC_RD(dev, coal_reg);
2174         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2175                 struct status_block_msix *sblk = cp->status_blk;
2176
2177                 cp->rx_cons_ptr = &sblk->status_rx_quick_consumer_index;
2178                 coal_reg = BNX2_HC_COALESCE_NOW;
2179                 coal_val = 1 << (11 + sb_id);
2180         }
2181         i = 0;
2182         while (!(*cp->rx_cons_ptr != 0) && i < 10) {
2183                 CNIC_WR(dev, coal_reg, coal_val);
2184                 udelay(10);
2185                 i++;
2186                 barrier();
2187         }
2188         cp->rx_cons = *cp->rx_cons_ptr;
2189
2190         cid_addr = GET_CID_ADDR(2);
2191         val = BNX2_L2CTX_CTX_TYPE_CTX_BD_CHN_TYPE_VALUE |
2192               BNX2_L2CTX_CTX_TYPE_SIZE_L2 | (0x02 << 8);
2193         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_CTX_TYPE, val);
2194
2195         if (sb_id == 0)
2196                 val = 2 << BNX2_L2CTX_STATUSB_NUM_SHIFT;
2197         else
2198                 val = BNX2_L2CTX_STATUSB_NUM(sb_id);
2199         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_HOST_BDIDX, val);
2200
2201         rxbd = (struct rx_bd *) (cp->l2_ring + BCM_PAGE_SIZE);
2202         for (i = 0; i < MAX_RX_DESC_CNT; i++, rxbd++) {
2203                 dma_addr_t buf_map;
2204                 int n = (i % cp->l2_rx_ring_size) + 1;
2205
2206                 buf_map = cp->l2_buf_map + (n * cp->l2_single_buf_size);
2207                 rxbd->rx_bd_len = cp->l2_single_buf_size;
2208                 rxbd->rx_bd_flags = RX_BD_FLAGS_START | RX_BD_FLAGS_END;
2209                 rxbd->rx_bd_haddr_hi = (u64) buf_map >> 32;
2210                 rxbd->rx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2211         }
2212         val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) >> 32;
2213         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_HI, val);
2214         rxbd->rx_bd_haddr_hi = val;
2215
2216         val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) & 0xffffffff;
2217         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_LO, val);
2218         rxbd->rx_bd_haddr_lo = val;
2219
2220         val = cnic_reg_rd_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD);
2221         cnic_reg_wr_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD, val | (1 << 2));
2222 }
2223
2224 static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *dev)
2225 {
2226         struct kwqe *wqes[1], l2kwqe;
2227
2228         memset(&l2kwqe, 0, sizeof(l2kwqe));
2229         wqes[0] = &l2kwqe;
2230         l2kwqe.kwqe_op_flag = (L2_LAYER_CODE << KWQE_FLAGS_LAYER_SHIFT) |
2231                               (L2_KWQE_OPCODE_VALUE_FLUSH <<
2232                                KWQE_OPCODE_SHIFT) | 2;
2233         dev->submit_kwqes(dev, wqes, 1);
2234 }
2235
2236 static void cnic_set_bnx2_mac(struct cnic_dev *dev)
2237 {
2238         struct cnic_local *cp = dev->cnic_priv;
2239         u32 val;
2240
2241         val = cp->func << 2;
2242
2243         cp->shmem_base = cnic_reg_rd_ind(dev, BNX2_SHM_HDR_ADDR_0 + val);
2244
2245         val = cnic_reg_rd_ind(dev, cp->shmem_base +
2246                               BNX2_PORT_HW_CFG_ISCSI_MAC_UPPER);
2247         dev->mac_addr[0] = (u8) (val >> 8);
2248         dev->mac_addr[1] = (u8) val;
2249
2250         CNIC_WR(dev, BNX2_EMAC_MAC_MATCH4, val);
2251
2252         val = cnic_reg_rd_ind(dev, cp->shmem_base +
2253                               BNX2_PORT_HW_CFG_ISCSI_MAC_LOWER);
2254         dev->mac_addr[2] = (u8) (val >> 24);
2255         dev->mac_addr[3] = (u8) (val >> 16);
2256         dev->mac_addr[4] = (u8) (val >> 8);
2257         dev->mac_addr[5] = (u8) val;
2258
2259         CNIC_WR(dev, BNX2_EMAC_MAC_MATCH5, val);
2260
2261         val = 4 | BNX2_RPM_SORT_USER2_BC_EN;
2262         if (CHIP_NUM(cp) != CHIP_NUM_5709)
2263                 val |= BNX2_RPM_SORT_USER2_PROM_VLAN;
2264
2265         CNIC_WR(dev, BNX2_RPM_SORT_USER2, 0x0);
2266         CNIC_WR(dev, BNX2_RPM_SORT_USER2, val);
2267         CNIC_WR(dev, BNX2_RPM_SORT_USER2, val | BNX2_RPM_SORT_USER2_ENA);
2268 }
2269
2270 static int cnic_start_bnx2_hw(struct cnic_dev *dev)
2271 {
2272         struct cnic_local *cp = dev->cnic_priv;
2273         struct cnic_eth_dev *ethdev = cp->ethdev;
2274         struct status_block *sblk = cp->status_blk;
2275         u32 val;
2276         int err;
2277
2278         cnic_set_bnx2_mac(dev);
2279
2280         val = CNIC_RD(dev, BNX2_MQ_CONFIG);
2281         val &= ~BNX2_MQ_CONFIG_KNL_BYP_BLK_SIZE;
2282         if (BCM_PAGE_BITS > 12)
2283                 val |= (12 - 8)  << 4;
2284         else
2285                 val |= (BCM_PAGE_BITS - 8)  << 4;
2286
2287         CNIC_WR(dev, BNX2_MQ_CONFIG, val);
2288
2289         CNIC_WR(dev, BNX2_HC_COMP_PROD_TRIP, (2 << 16) | 8);
2290         CNIC_WR(dev, BNX2_HC_COM_TICKS, (64 << 16) | 220);
2291         CNIC_WR(dev, BNX2_HC_CMD_TICKS, (64 << 16) | 220);
2292
2293         err = cnic_setup_5709_context(dev, 1);
2294         if (err)
2295                 return err;
2296
2297         cnic_init_context(dev, KWQ_CID);
2298         cnic_init_context(dev, KCQ_CID);
2299
2300         cp->kwq_cid_addr = GET_CID_ADDR(KWQ_CID);
2301         cp->kwq_io_addr = MB_GET_CID_ADDR(KWQ_CID) + L5_KRNLQ_HOST_QIDX;
2302
2303         cp->max_kwq_idx = MAX_KWQ_IDX;
2304         cp->kwq_prod_idx = 0;
2305         cp->kwq_con_idx = 0;
2306         cp->cnic_local_flags |= CNIC_LCL_FL_KWQ_INIT;
2307
2308         if (CHIP_NUM(cp) == CHIP_NUM_5706 || CHIP_NUM(cp) == CHIP_NUM_5708)
2309                 cp->kwq_con_idx_ptr = &sblk->status_rx_quick_consumer_index15;
2310         else
2311                 cp->kwq_con_idx_ptr = &sblk->status_cmd_consumer_index;
2312
2313         /* Initialize the kernel work queue context. */
2314         val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2315               (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2316         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_TYPE, val);
2317
2318         val = (BCM_PAGE_SIZE / sizeof(struct kwqe) - 1) << 16;
2319         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2320
2321         val = ((BCM_PAGE_SIZE / sizeof(struct kwqe)) << 16) | KWQ_PAGE_CNT;
2322         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2323
2324         val = (u32) ((u64) cp->kwq_info.pgtbl_map >> 32);
2325         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2326
2327         val = (u32) cp->kwq_info.pgtbl_map;
2328         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2329
2330         cp->kcq_cid_addr = GET_CID_ADDR(KCQ_CID);
2331         cp->kcq_io_addr = MB_GET_CID_ADDR(KCQ_CID) + L5_KRNLQ_HOST_QIDX;
2332
2333         cp->kcq_prod_idx = 0;
2334
2335         /* Initialize the kernel complete queue context. */
2336         val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2337               (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2338         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_TYPE, val);
2339
2340         val = (BCM_PAGE_SIZE / sizeof(struct kcqe) - 1) << 16;
2341         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2342
2343         val = ((BCM_PAGE_SIZE / sizeof(struct kcqe)) << 16) | KCQ_PAGE_CNT;
2344         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2345
2346         val = (u32) ((u64) cp->kcq_info.pgtbl_map >> 32);
2347         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2348
2349         val = (u32) cp->kcq_info.pgtbl_map;
2350         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2351
2352         cp->int_num = 0;
2353         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2354                 u32 sb_id = cp->status_blk_num;
2355                 u32 sb = BNX2_L2CTX_STATUSB_NUM(sb_id);
2356
2357                 cp->int_num = sb_id << BNX2_PCICFG_INT_ACK_CMD_INT_NUM_SHIFT;
2358                 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2359                 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2360         }
2361
2362         /* Enable Commnad Scheduler notification when we write to the
2363          * host producer index of the kernel contexts. */
2364         CNIC_WR(dev, BNX2_MQ_KNL_CMD_MASK1, 2);
2365
2366         /* Enable Command Scheduler notification when we write to either
2367          * the Send Queue or Receive Queue producer indexes of the kernel
2368          * bypass contexts. */
2369         CNIC_WR(dev, BNX2_MQ_KNL_BYP_CMD_MASK1, 7);
2370         CNIC_WR(dev, BNX2_MQ_KNL_BYP_WRITE_MASK1, 7);
2371
2372         /* Notify COM when the driver post an application buffer. */
2373         CNIC_WR(dev, BNX2_MQ_KNL_RX_V2P_MASK2, 0x2000);
2374
2375         /* Set the CP and COM doorbells.  These two processors polls the
2376          * doorbell for a non zero value before running.  This must be done
2377          * after setting up the kernel queue contexts. */
2378         cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 1);
2379         cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 1);
2380
2381         cnic_init_bnx2_tx_ring(dev);
2382         cnic_init_bnx2_rx_ring(dev);
2383
2384         err = cnic_init_bnx2_irq(dev);
2385         if (err) {
2386                 printk(KERN_ERR PFX "%s: cnic_init_irq failed\n",
2387                        dev->netdev->name);
2388                 cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2389                 cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2390                 return err;
2391         }
2392
2393         return 0;
2394 }
2395
2396 static int cnic_start_hw(struct cnic_dev *dev)
2397 {
2398         struct cnic_local *cp = dev->cnic_priv;
2399         struct cnic_eth_dev *ethdev = cp->ethdev;
2400         int err;
2401
2402         if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
2403                 return -EALREADY;
2404
2405         err = ethdev->drv_register_cnic(dev->netdev, cp->cnic_ops, dev);
2406         if (err) {
2407                 printk(KERN_ERR PFX "%s: register_cnic failed\n",
2408                        dev->netdev->name);
2409                 goto err2;
2410         }
2411
2412         dev->regview = ethdev->io_base;
2413         cp->chip_id = ethdev->chip_id;
2414         pci_dev_get(dev->pcidev);
2415         cp->func = PCI_FUNC(dev->pcidev->devfn);
2416         cp->status_blk = ethdev->irq_arr[0].status_blk;
2417         cp->status_blk_num = ethdev->irq_arr[0].status_blk_num;
2418
2419         err = cp->alloc_resc(dev);
2420         if (err) {
2421                 printk(KERN_ERR PFX "%s: allocate resource failure\n",
2422                        dev->netdev->name);
2423                 goto err1;
2424         }
2425
2426         err = cp->start_hw(dev);
2427         if (err)
2428                 goto err1;
2429
2430         err = cnic_cm_open(dev);
2431         if (err)
2432                 goto err1;
2433
2434         set_bit(CNIC_F_CNIC_UP, &dev->flags);
2435
2436         cp->enable_int(dev);
2437
2438         return 0;
2439
2440 err1:
2441         ethdev->drv_unregister_cnic(dev->netdev);
2442         cp->free_resc(dev);
2443         pci_dev_put(dev->pcidev);
2444 err2:
2445         return err;
2446 }
2447
2448 static void cnic_stop_bnx2_hw(struct cnic_dev *dev)
2449 {
2450         struct cnic_local *cp = dev->cnic_priv;
2451         struct cnic_eth_dev *ethdev = cp->ethdev;
2452
2453         cnic_disable_bnx2_int_sync(dev);
2454
2455         cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2456         cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2457
2458         cnic_init_context(dev, KWQ_CID);
2459         cnic_init_context(dev, KCQ_CID);
2460
2461         cnic_setup_5709_context(dev, 0);
2462         cnic_free_irq(dev);
2463
2464         ethdev->drv_unregister_cnic(dev->netdev);
2465
2466         cnic_free_resc(dev);
2467 }
2468
2469 static void cnic_stop_hw(struct cnic_dev *dev)
2470 {
2471         if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2472                 struct cnic_local *cp = dev->cnic_priv;
2473
2474                 clear_bit(CNIC_F_CNIC_UP, &dev->flags);
2475                 rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], NULL);
2476                 synchronize_rcu();
2477                 cnic_cm_shutdown(dev);
2478                 cp->stop_hw(dev);
2479                 pci_dev_put(dev->pcidev);
2480         }
2481 }
2482
2483 static void cnic_free_dev(struct cnic_dev *dev)
2484 {
2485         int i = 0;
2486
2487         while ((atomic_read(&dev->ref_count) != 0) && i < 10) {
2488                 msleep(100);
2489                 i++;
2490         }
2491         if (atomic_read(&dev->ref_count) != 0)
2492                 printk(KERN_ERR PFX "%s: Failed waiting for ref count to go"
2493                                     " to zero.\n", dev->netdev->name);
2494
2495         printk(KERN_INFO PFX "Removed CNIC device: %s\n", dev->netdev->name);
2496         dev_put(dev->netdev);
2497         kfree(dev);
2498 }
2499
2500 static struct cnic_dev *cnic_alloc_dev(struct net_device *dev,
2501                                        struct pci_dev *pdev)
2502 {
2503         struct cnic_dev *cdev;
2504         struct cnic_local *cp;
2505         int alloc_size;
2506
2507         alloc_size = sizeof(struct cnic_dev) + sizeof(struct cnic_local);
2508
2509         cdev = kzalloc(alloc_size , GFP_KERNEL);
2510         if (cdev == NULL) {
2511                 printk(KERN_ERR PFX "%s: allocate dev struct failure\n",
2512                        dev->name);
2513                 return NULL;
2514         }
2515
2516         cdev->netdev = dev;
2517         cdev->cnic_priv = (char *)cdev + sizeof(struct cnic_dev);
2518         cdev->register_device = cnic_register_device;
2519         cdev->unregister_device = cnic_unregister_device;
2520         cdev->iscsi_nl_msg_recv = cnic_iscsi_nl_msg_recv;
2521
2522         cp = cdev->cnic_priv;
2523         cp->dev = cdev;
2524         cp->uio_dev = -1;
2525         cp->l2_single_buf_size = 0x400;
2526         cp->l2_rx_ring_size = 3;
2527
2528         spin_lock_init(&cp->cnic_ulp_lock);
2529
2530         printk(KERN_INFO PFX "Added CNIC device: %s\n", dev->name);
2531
2532         return cdev;
2533 }
2534
2535 static struct cnic_dev *init_bnx2_cnic(struct net_device *dev)
2536 {
2537         struct pci_dev *pdev;
2538         struct cnic_dev *cdev;
2539         struct cnic_local *cp;
2540         struct cnic_eth_dev *ethdev = NULL;
2541         struct cnic_eth_dev *(*probe)(struct net_device *) = NULL;
2542
2543         probe = symbol_get(bnx2_cnic_probe);
2544         if (probe) {
2545                 ethdev = (*probe)(dev);
2546                 symbol_put_addr(probe);
2547         }
2548         if (!ethdev)
2549                 return NULL;
2550
2551         pdev = ethdev->pdev;
2552         if (!pdev)
2553                 return NULL;
2554
2555         dev_hold(dev);
2556         pci_dev_get(pdev);
2557         if (pdev->device == PCI_DEVICE_ID_NX2_5709 ||
2558             pdev->device == PCI_DEVICE_ID_NX2_5709S) {
2559                 u8 rev;
2560
2561                 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
2562                 if (rev < 0x10) {
2563                         pci_dev_put(pdev);
2564                         goto cnic_err;
2565                 }
2566         }
2567         pci_dev_put(pdev);
2568
2569         cdev = cnic_alloc_dev(dev, pdev);
2570         if (cdev == NULL)
2571                 goto cnic_err;
2572
2573         set_bit(CNIC_F_BNX2_CLASS, &cdev->flags);
2574         cdev->submit_kwqes = cnic_submit_bnx2_kwqes;
2575
2576         cp = cdev->cnic_priv;
2577         cp->ethdev = ethdev;
2578         cdev->pcidev = pdev;
2579
2580         cp->cnic_ops = &cnic_bnx2_ops;
2581         cp->start_hw = cnic_start_bnx2_hw;
2582         cp->stop_hw = cnic_stop_bnx2_hw;
2583         cp->setup_pgtbl = cnic_setup_page_tbl;
2584         cp->alloc_resc = cnic_alloc_bnx2_resc;
2585         cp->free_resc = cnic_free_resc;
2586         cp->start_cm = cnic_cm_init_bnx2_hw;
2587         cp->stop_cm = cnic_cm_stop_bnx2_hw;
2588         cp->enable_int = cnic_enable_bnx2_int;
2589         cp->disable_int_sync = cnic_disable_bnx2_int_sync;
2590         cp->close_conn = cnic_close_bnx2_conn;
2591         cp->next_idx = cnic_bnx2_next_idx;
2592         cp->hw_idx = cnic_bnx2_hw_idx;
2593         return cdev;
2594
2595 cnic_err:
2596         dev_put(dev);
2597         return NULL;
2598 }
2599
2600 static struct cnic_dev *is_cnic_dev(struct net_device *dev)
2601 {
2602         struct ethtool_drvinfo drvinfo;
2603         struct cnic_dev *cdev = NULL;
2604
2605         if (dev->ethtool_ops && dev->ethtool_ops->get_drvinfo) {
2606                 memset(&drvinfo, 0, sizeof(drvinfo));
2607                 dev->ethtool_ops->get_drvinfo(dev, &drvinfo);
2608
2609                 if (!strcmp(drvinfo.driver, "bnx2"))
2610                         cdev = init_bnx2_cnic(dev);
2611                 if (cdev) {
2612                         write_lock(&cnic_dev_lock);
2613                         list_add(&cdev->list, &cnic_dev_list);
2614                         write_unlock(&cnic_dev_lock);
2615                 }
2616         }
2617         return cdev;
2618 }
2619
2620 /**
2621  * netdev event handler
2622  */
2623 static int cnic_netdev_event(struct notifier_block *this, unsigned long event,
2624                                                          void *ptr)
2625 {
2626         struct net_device *netdev = ptr;
2627         struct cnic_dev *dev;
2628         int if_type;
2629         int new_dev = 0;
2630
2631         dev = cnic_from_netdev(netdev);
2632
2633         if (!dev && (event == NETDEV_REGISTER || event == NETDEV_UP)) {
2634                 /* Check for the hot-plug device */
2635                 dev = is_cnic_dev(netdev);
2636                 if (dev) {
2637                         new_dev = 1;
2638                         cnic_hold(dev);
2639                 }
2640         }
2641         if (dev) {
2642                 struct cnic_local *cp = dev->cnic_priv;
2643
2644                 if (new_dev)
2645                         cnic_ulp_init(dev);
2646                 else if (event == NETDEV_UNREGISTER)
2647                         cnic_ulp_exit(dev);
2648                 else if (event == NETDEV_UP) {
2649                         mutex_lock(&cnic_lock);
2650                         if (!cnic_start_hw(dev))
2651                                 cnic_ulp_start(dev);
2652                         mutex_unlock(&cnic_lock);
2653                 }
2654
2655                 rcu_read_lock();
2656                 for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
2657                         struct cnic_ulp_ops *ulp_ops;
2658                         void *ctx;
2659
2660                         ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
2661                         if (!ulp_ops || !ulp_ops->indicate_netevent)
2662                                 continue;
2663
2664                         ctx = cp->ulp_handle[if_type];
2665
2666                         ulp_ops->indicate_netevent(ctx, event);
2667                 }
2668                 rcu_read_unlock();
2669
2670                 if (event == NETDEV_GOING_DOWN) {
2671                         mutex_lock(&cnic_lock);
2672                         cnic_ulp_stop(dev);
2673                         cnic_stop_hw(dev);
2674                         mutex_unlock(&cnic_lock);
2675                 } else if (event == NETDEV_UNREGISTER) {
2676                         write_lock(&cnic_dev_lock);
2677                         list_del_init(&dev->list);
2678                         write_unlock(&cnic_dev_lock);
2679
2680                         cnic_put(dev);
2681                         cnic_free_dev(dev);
2682                         goto done;
2683                 }
2684                 cnic_put(dev);
2685         }
2686 done:
2687         return NOTIFY_DONE;
2688 }
2689
2690 static struct notifier_block cnic_netdev_notifier = {
2691         .notifier_call = cnic_netdev_event
2692 };
2693
2694 static void cnic_release(void)
2695 {
2696         struct cnic_dev *dev;
2697
2698         while (!list_empty(&cnic_dev_list)) {
2699                 dev = list_entry(cnic_dev_list.next, struct cnic_dev, list);
2700                 if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2701                         cnic_ulp_stop(dev);
2702                         cnic_stop_hw(dev);
2703                 }
2704
2705                 cnic_ulp_exit(dev);
2706                 list_del_init(&dev->list);
2707                 cnic_free_dev(dev);
2708         }
2709 }
2710
2711 static int __init cnic_init(void)
2712 {
2713         int rc = 0;
2714
2715         printk(KERN_INFO "%s", version);
2716
2717         rc = register_netdevice_notifier(&cnic_netdev_notifier);
2718         if (rc) {
2719                 cnic_release();
2720                 return rc;
2721         }
2722
2723         return 0;
2724 }
2725
2726 static void __exit cnic_exit(void)
2727 {
2728         unregister_netdevice_notifier(&cnic_netdev_notifier);
2729         cnic_release();
2730         return;
2731 }
2732
2733 module_init(cnic_init);
2734 module_exit(cnic_exit);