drivers/net/cnic.c

   1 /* cnic.c: Broadcom CNIC core network driver.
   2  *
   3  * Copyright (c) 2006-2009 Broadcom Corporation
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation.
   8  *
   9  * Original skeleton written by: John(Zongxi) Chen (zongxi@broadcom.com)
  10  * Modified and maintained by: Michael Chan <mchan@broadcom.com>
  11  */
  12
  13 #include <linux/module.h>
  14
  15 #include <linux/kernel.h>
  16 #include <linux/errno.h>
  17 #include <linux/list.h>
  18 #include <linux/slab.h>
  19 #include <linux/pci.h>
  20 #include <linux/init.h>
  21 #include <linux/netdevice.h>
  22 #include <linux/uio_driver.h>
  23 #include <linux/in.h>
  24 #include <linux/dma-mapping.h>
  25 #include <linux/delay.h>
  26 #include <linux/ethtool.h>
  27 #include <linux/if_vlan.h>
  28 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
  29 #define BCM_VLAN 1
  30 #endif
  31 #include <net/ip.h>
  32 #include <net/tcp.h>
  33 #include <net/route.h>
  34 #include <net/ipv6.h>
  35 #include <net/ip6_route.h>
  36 #include <scsi/iscsi_if.h>
  37
  38 #include "cnic_if.h"
  39 #include "bnx2.h"
  40 #include "cnic.h"
  41 #include "cnic_defs.h"
  42
  43 #define DRV_MODULE_NAME         "cnic"
  44 #define PFX DRV_MODULE_NAME     ": "
  45
  46 static char version[] __devinitdata =
  47         "Broadcom NetXtreme II CNIC Driver " DRV_MODULE_NAME " v" CNIC_MODULE_VERSION " (" CNIC_MODULE_RELDATE ")\n";
  48
  49 MODULE_AUTHOR("Michael Chan <mchan@broadcom.com> and John(Zongxi) "
  50               "Chen (zongxi@broadcom.com");
  51 MODULE_DESCRIPTION("Broadcom NetXtreme II CNIC Driver");
  52 MODULE_LICENSE("GPL");
  53 MODULE_VERSION(CNIC_MODULE_VERSION);
  54
  55 static LIST_HEAD(cnic_dev_list);
  56 static DEFINE_RWLOCK(cnic_dev_lock);
  57 static DEFINE_MUTEX(cnic_lock);
  58
  59 static struct cnic_ulp_ops *cnic_ulp_tbl[MAX_CNIC_ULP_TYPE];
  60
  61 static int cnic_service_bnx2(void *, void *);
  62 static int cnic_ctl(void *, struct cnic_ctl_info *);
  63
  64 static struct cnic_ops cnic_bnx2_ops = {
  65         .cnic_owner     = THIS_MODULE,
  66         .cnic_handler   = cnic_service_bnx2,
  67         .cnic_ctl       = cnic_ctl,
  68 };
  69
  70 static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *);
  71 static void cnic_init_bnx2_tx_ring(struct cnic_dev *);
  72 static void cnic_init_bnx2_rx_ring(struct cnic_dev *);
  73 static int cnic_cm_set_pg(struct cnic_sock *);
  74
  75 static int cnic_uio_open(struct uio_info *uinfo, struct inode *inode)
  76 {
  77         struct cnic_dev *dev = uinfo->priv;
  78         struct cnic_local *cp = dev->cnic_priv;
  79
  80         if (!capable(CAP_NET_ADMIN))
  81                 return -EPERM;
  82
  83         if (cp->uio_dev != -1)
  84                 return -EBUSY;
  85
  86         cp->uio_dev = iminor(inode);
  87
  88         cnic_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(cp->ulp_ops[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 int cnic_register_driver(int ulp_type, struct cnic_ulp_ops *ulp_ops)
 323 {
 324         struct cnic_dev *dev;
 325
 326         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 327                 printk(KERN_ERR PFX "cnic_register_driver: Bad type %d\n",
 328                        ulp_type);
 329                 return -EINVAL;
 330         }
 331         mutex_lock(&cnic_lock);
 332         if (cnic_ulp_tbl[ulp_type]) {
 333                 printk(KERN_ERR PFX "cnic_register_driver: Type %d has already "
 334                                     "been registered\n", ulp_type);
 335                 mutex_unlock(&cnic_lock);
 336                 return -EBUSY;
 337         }
 338
 339         read_lock(&cnic_dev_lock);
 340         list_for_each_entry(dev, &cnic_dev_list, list) {
 341                 struct cnic_local *cp = dev->cnic_priv;
 342
 343                 clear_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]);
 344         }
 345         read_unlock(&cnic_dev_lock);
 346
 347         rcu_assign_pointer(cnic_ulp_tbl[ulp_type], ulp_ops);
 348         mutex_unlock(&cnic_lock);
 349
 350         /* Prevent race conditions with netdev_event */
 351         rtnl_lock();
 352         read_lock(&cnic_dev_lock);
 353         list_for_each_entry(dev, &cnic_dev_list, list) {
 354                 struct cnic_local *cp = dev->cnic_priv;
 355
 356                 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]))
 357                         ulp_ops->cnic_init(dev);
 358         }
 359         read_unlock(&cnic_dev_lock);
 360         rtnl_unlock();
 361
 362         return 0;
 363 }
 364
 365 int cnic_unregister_driver(int ulp_type)
 366 {
 367         struct cnic_dev *dev;
 368
 369         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 370                 printk(KERN_ERR PFX "cnic_unregister_driver: Bad type %d\n",
 371                        ulp_type);
 372                 return -EINVAL;
 373         }
 374         mutex_lock(&cnic_lock);
 375         if (!cnic_ulp_tbl[ulp_type]) {
 376                 printk(KERN_ERR PFX "cnic_unregister_driver: Type %d has not "
 377                                     "been registered\n", ulp_type);
 378                 goto out_unlock;
 379         }
 380         read_lock(&cnic_dev_lock);
 381         list_for_each_entry(dev, &cnic_dev_list, list) {
 382                 struct cnic_local *cp = dev->cnic_priv;
 383
 384                 if (rcu_dereference(cp->ulp_ops[ulp_type])) {
 385                         printk(KERN_ERR PFX "cnic_unregister_driver: Type %d "
 386                                "still has devices registered\n", ulp_type);
 387                         read_unlock(&cnic_dev_lock);
 388                         goto out_unlock;
 389                 }
 390         }
 391         read_unlock(&cnic_dev_lock);
 392
 393         rcu_assign_pointer(cnic_ulp_tbl[ulp_type], NULL);
 394
 395         mutex_unlock(&cnic_lock);
 396         synchronize_rcu();
 397         return 0;
 398
 399 out_unlock:
 400         mutex_unlock(&cnic_lock);
 401         return -EINVAL;
 402 }
 403
 404 static int cnic_start_hw(struct cnic_dev *);
 405 static void cnic_stop_hw(struct cnic_dev *);
 406
 407 static int cnic_register_device(struct cnic_dev *dev, int ulp_type,
 408                                 void *ulp_ctx)
 409 {
 410         struct cnic_local *cp = dev->cnic_priv;
 411         struct cnic_ulp_ops *ulp_ops;
 412
 413         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 414                 printk(KERN_ERR PFX "cnic_register_device: Bad type %d\n",
 415                        ulp_type);
 416                 return -EINVAL;
 417         }
 418         mutex_lock(&cnic_lock);
 419         if (cnic_ulp_tbl[ulp_type] == NULL) {
 420                 printk(KERN_ERR PFX "cnic_register_device: Driver with type %d "
 421                                     "has not been registered\n", ulp_type);
 422                 mutex_unlock(&cnic_lock);
 423                 return -EAGAIN;
 424         }
 425         if (rcu_dereference(cp->ulp_ops[ulp_type])) {
 426                 printk(KERN_ERR PFX "cnic_register_device: Type %d has already "
 427                        "been registered to this device\n", ulp_type);
 428                 mutex_unlock(&cnic_lock);
 429                 return -EBUSY;
 430         }
 431
 432         clear_bit(ULP_F_START, &cp->ulp_flags[ulp_type]);
 433         cp->ulp_handle[ulp_type] = ulp_ctx;
 434         ulp_ops = cnic_ulp_tbl[ulp_type];
 435         rcu_assign_pointer(cp->ulp_ops[ulp_type], ulp_ops);
 436         cnic_hold(dev);
 437
 438         if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
 439                 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[ulp_type]))
 440                         ulp_ops->cnic_start(cp->ulp_handle[ulp_type]);
 441
 442         mutex_unlock(&cnic_lock);
 443
 444         return 0;
 445
 446 }
 447 EXPORT_SYMBOL(cnic_register_driver);
 448
 449 static int cnic_unregister_device(struct cnic_dev *dev, int ulp_type)
 450 {
 451         struct cnic_local *cp = dev->cnic_priv;
 452
 453         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 454                 printk(KERN_ERR PFX "cnic_unregister_device: Bad type %d\n",
 455                        ulp_type);
 456                 return -EINVAL;
 457         }
 458         mutex_lock(&cnic_lock);
 459         if (rcu_dereference(cp->ulp_ops[ulp_type])) {
 460                 rcu_assign_pointer(cp->ulp_ops[ulp_type], NULL);
 461                 cnic_put(dev);
 462         } else {
 463                 printk(KERN_ERR PFX "cnic_unregister_device: device not "
 464                        "registered to this ulp type %d\n", ulp_type);
 465                 mutex_unlock(&cnic_lock);
 466                 return -EINVAL;
 467         }
 468         mutex_unlock(&cnic_lock);
 469
 470         synchronize_rcu();
 471
 472         return 0;
 473 }
 474 EXPORT_SYMBOL(cnic_unregister_driver);
 475
 476 static int cnic_init_id_tbl(struct cnic_id_tbl *id_tbl, u32 size, u32 start_id)
 477 {
 478         id_tbl->start = start_id;
 479         id_tbl->max = size;
 480         id_tbl->next = 0;
 481         spin_lock_init(&id_tbl->lock);
 482         id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
 483         if (!id_tbl->table)
 484                 return -ENOMEM;
 485
 486         return 0;
 487 }
 488
 489 static void cnic_free_id_tbl(struct cnic_id_tbl *id_tbl)
 490 {
 491         kfree(id_tbl->table);
 492         id_tbl->table = NULL;
 493 }
 494
 495 static int cnic_alloc_id(struct cnic_id_tbl *id_tbl, u32 id)
 496 {
 497         int ret = -1;
 498
 499         id -= id_tbl->start;
 500         if (id >= id_tbl->max)
 501                 return ret;
 502
 503         spin_lock(&id_tbl->lock);
 504         if (!test_bit(id, id_tbl->table)) {
 505                 set_bit(id, id_tbl->table);
 506                 ret = 0;
 507         }
 508         spin_unlock(&id_tbl->lock);
 509         return ret;
 510 }
 511
 512 /* Returns -1 if not successful */
 513 static u32 cnic_alloc_new_id(struct cnic_id_tbl *id_tbl)
 514 {
 515         u32 id;
 516
 517         spin_lock(&id_tbl->lock);
 518         id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
 519         if (id >= id_tbl->max) {
 520                 id = -1;
 521                 if (id_tbl->next != 0) {
 522                         id = find_first_zero_bit(id_tbl->table, id_tbl->next);
 523                         if (id >= id_tbl->next)
 524                                 id = -1;
 525                 }
 526         }
 527
 528         if (id < id_tbl->max) {
 529                 set_bit(id, id_tbl->table);
 530                 id_tbl->next = (id + 1) & (id_tbl->max - 1);
 531                 id += id_tbl->start;
 532         }
 533
 534         spin_unlock(&id_tbl->lock);
 535
 536         return id;
 537 }
 538
 539 static void cnic_free_id(struct cnic_id_tbl *id_tbl, u32 id)
 540 {
 541         if (id == -1)
 542                 return;
 543
 544         id -= id_tbl->start;
 545         if (id >= id_tbl->max)
 546                 return;
 547
 548         clear_bit(id, id_tbl->table);
 549 }
 550
 551 static void cnic_free_dma(struct cnic_dev *dev, struct cnic_dma *dma)
 552 {
 553         int i;
 554
 555         if (!dma->pg_arr)
 556                 return;
 557
 558         for (i = 0; i < dma->num_pages; i++) {
 559                 if (dma->pg_arr[i]) {
 560                         pci_free_consistent(dev->pcidev, BCM_PAGE_SIZE,
 561                                             dma->pg_arr[i], dma->pg_map_arr[i]);
 562                         dma->pg_arr[i] = NULL;
 563                 }
 564         }
 565         if (dma->pgtbl) {
 566                 pci_free_consistent(dev->pcidev, dma->pgtbl_size,
 567                                     dma->pgtbl, dma->pgtbl_map);
 568                 dma->pgtbl = NULL;
 569         }
 570         kfree(dma->pg_arr);
 571         dma->pg_arr = NULL;
 572         dma->num_pages = 0;
 573 }
 574
 575 static void cnic_setup_page_tbl(struct cnic_dev *dev, struct cnic_dma *dma)
 576 {
 577         int i;
 578         u32 *page_table = dma->pgtbl;
 579
 580         for (i = 0; i < dma->num_pages; i++) {
 581                 /* Each entry needs to be in big endian format. */
 582                 *page_table = (u32) ((u64) dma->pg_map_arr[i] >> 32);
 583                 page_table++;
 584                 *page_table = (u32) dma->pg_map_arr[i];
 585                 page_table++;
 586         }
 587 }
 588
 589 static int cnic_alloc_dma(struct cnic_dev *dev, struct cnic_dma *dma,
 590                           int pages, int use_pg_tbl)
 591 {
 592         int i, size;
 593         struct cnic_local *cp = dev->cnic_priv;
 594
 595         size = pages * (sizeof(void *) + sizeof(dma_addr_t));
 596         dma->pg_arr = kzalloc(size, GFP_ATOMIC);
 597         if (dma->pg_arr == NULL)
 598                 return -ENOMEM;
 599
 600         dma->pg_map_arr = (dma_addr_t *) (dma->pg_arr + pages);
 601         dma->num_pages = pages;
 602
 603         for (i = 0; i < pages; i++) {
 604                 dma->pg_arr[i] = pci_alloc_consistent(dev->pcidev,
 605                                                       BCM_PAGE_SIZE,
 606                                                       &dma->pg_map_arr[i]);
 607                 if (dma->pg_arr[i] == NULL)
 608                         goto error;
 609         }
 610         if (!use_pg_tbl)
 611                 return 0;
 612
 613         dma->pgtbl_size = ((pages * 8) + BCM_PAGE_SIZE - 1) &
 614                           ~(BCM_PAGE_SIZE - 1);
 615         dma->pgtbl = pci_alloc_consistent(dev->pcidev, dma->pgtbl_size,
 616                                           &dma->pgtbl_map);
 617         if (dma->pgtbl == NULL)
 618                 goto error;
 619
 620         cp->setup_pgtbl(dev, dma);
 621
 622         return 0;
 623
 624 error:
 625         cnic_free_dma(dev, dma);
 626         return -ENOMEM;
 627 }
 628
 629 static void cnic_free_resc(struct cnic_dev *dev)
 630 {
 631         struct cnic_local *cp = dev->cnic_priv;
 632         int i = 0;
 633
 634         if (cp->cnic_uinfo) {
 635                 cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
 636                 while (cp->uio_dev != -1 && i < 15) {
 637                         msleep(100);
 638                         i++;
 639                 }
 640                 uio_unregister_device(cp->cnic_uinfo);
 641                 kfree(cp->cnic_uinfo);
 642                 cp->cnic_uinfo = NULL;
 643         }
 644
 645         if (cp->l2_buf) {
 646                 pci_free_consistent(dev->pcidev, cp->l2_buf_size,
 647                                     cp->l2_buf, cp->l2_buf_map);
 648                 cp->l2_buf = NULL;
 649         }
 650
 651         if (cp->l2_ring) {
 652                 pci_free_consistent(dev->pcidev, cp->l2_ring_size,
 653                                     cp->l2_ring, cp->l2_ring_map);
 654                 cp->l2_ring = NULL;
 655         }
 656
 657         for (i = 0; i < cp->ctx_blks; i++) {
 658                 if (cp->ctx_arr[i].ctx) {
 659                         pci_free_consistent(dev->pcidev, cp->ctx_blk_size,
 660                                             cp->ctx_arr[i].ctx,
 661                                             cp->ctx_arr[i].mapping);
 662                         cp->ctx_arr[i].ctx = NULL;
 663                 }
 664         }
 665         kfree(cp->ctx_arr);
 666         cp->ctx_arr = NULL;
 667         cp->ctx_blks = 0;
 668
 669         cnic_free_dma(dev, &cp->gbl_buf_info);
 670         cnic_free_dma(dev, &cp->conn_buf_info);
 671         cnic_free_dma(dev, &cp->kwq_info);
 672         cnic_free_dma(dev, &cp->kcq_info);
 673         kfree(cp->iscsi_tbl);
 674         cp->iscsi_tbl = NULL;
 675         kfree(cp->ctx_tbl);
 676         cp->ctx_tbl = NULL;
 677
 678         cnic_free_id_tbl(&cp->cid_tbl);
 679 }
 680
 681 static int cnic_alloc_context(struct cnic_dev *dev)
 682 {
 683         struct cnic_local *cp = dev->cnic_priv;
 684
 685         if (CHIP_NUM(cp) == CHIP_NUM_5709) {
 686                 int i, k, arr_size;
 687
 688                 cp->ctx_blk_size = BCM_PAGE_SIZE;
 689                 cp->cids_per_blk = BCM_PAGE_SIZE / 128;
 690                 arr_size = BNX2_MAX_CID / cp->cids_per_blk *
 691                            sizeof(struct cnic_ctx);
 692                 cp->ctx_arr = kzalloc(arr_size, GFP_KERNEL);
 693                 if (cp->ctx_arr == NULL)
 694                         return -ENOMEM;
 695
 696                 k = 0;
 697                 for (i = 0; i < 2; i++) {
 698                         u32 j, reg, off, lo, hi;
 699
 700                         if (i == 0)
 701                                 off = BNX2_PG_CTX_MAP;
 702                         else
 703                                 off = BNX2_ISCSI_CTX_MAP;
 704
 705                         reg = cnic_reg_rd_ind(dev, off);
 706                         lo = reg >> 16;
 707                         hi = reg & 0xffff;
 708                         for (j = lo; j < hi; j += cp->cids_per_blk, k++)
 709                                 cp->ctx_arr[k].cid = j;
 710                 }
 711
 712                 cp->ctx_blks = k;
 713                 if (cp->ctx_blks >= (BNX2_MAX_CID / cp->cids_per_blk)) {
 714                         cp->ctx_blks = 0;
 715                         return -ENOMEM;
 716                 }
 717
 718                 for (i = 0; i < cp->ctx_blks; i++) {
 719                         cp->ctx_arr[i].ctx =
 720                                 pci_alloc_consistent(dev->pcidev, BCM_PAGE_SIZE,
 721                                                      &cp->ctx_arr[i].mapping);
 722                         if (cp->ctx_arr[i].ctx == NULL)
 723                                 return -ENOMEM;
 724                 }
 725         }
 726         return 0;
 727 }
 728
 729 static int cnic_alloc_bnx2_resc(struct cnic_dev *dev)
 730 {
 731         struct cnic_local *cp = dev->cnic_priv;
 732         struct uio_info *uinfo;
 733         int ret;
 734
 735         ret = cnic_alloc_dma(dev, &cp->kwq_info, KWQ_PAGE_CNT, 1);
 736         if (ret)
 737                 goto error;
 738         cp->kwq = (struct kwqe **) cp->kwq_info.pg_arr;
 739
 740         ret = cnic_alloc_dma(dev, &cp->kcq_info, KCQ_PAGE_CNT, 1);
 741         if (ret)
 742                 goto error;
 743         cp->kcq = (struct kcqe **) cp->kcq_info.pg_arr;
 744
 745         ret = cnic_alloc_context(dev);
 746         if (ret)
 747                 goto error;
 748
 749         cp->l2_ring_size = 2 * BCM_PAGE_SIZE;
 750         cp->l2_ring = pci_alloc_consistent(dev->pcidev, cp->l2_ring_size,
 751                                            &cp->l2_ring_map);
 752         if (!cp->l2_ring)
 753                 goto error;
 754
 755         cp->l2_buf_size = (cp->l2_rx_ring_size + 1) * cp->l2_single_buf_size;
 756         cp->l2_buf_size = PAGE_ALIGN(cp->l2_buf_size);
 757         cp->l2_buf = pci_alloc_consistent(dev->pcidev, cp->l2_buf_size,
 758                                            &cp->l2_buf_map);
 759         if (!cp->l2_buf)
 760                 goto error;
 761
 762         uinfo = kzalloc(sizeof(*uinfo), GFP_ATOMIC);
 763         if (!uinfo)
 764                 goto error;
 765
 766         uinfo->mem[0].addr = dev->netdev->base_addr;
 767         uinfo->mem[0].internal_addr = dev->regview;
 768         uinfo->mem[0].size = dev->netdev->mem_end - dev->netdev->mem_start;
 769         uinfo->mem[0].memtype = UIO_MEM_PHYS;
 770
 771         uinfo->mem[1].addr = (unsigned long) cp->status_blk & PAGE_MASK;
 772         if (cp->ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX)
 773                 uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE * 9;
 774         else
 775                 uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE;
 776         uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
 777
 778         uinfo->mem[2].addr = (unsigned long) cp->l2_ring;
 779         uinfo->mem[2].size = cp->l2_ring_size;
 780         uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
 781
 782         uinfo->mem[3].addr = (unsigned long) cp->l2_buf;
 783         uinfo->mem[3].size = cp->l2_buf_size;
 784         uinfo->mem[3].memtype = UIO_MEM_LOGICAL;
 785
 786         uinfo->name = "bnx2_cnic";
 787         uinfo->version = CNIC_MODULE_VERSION;
 788         uinfo->irq = UIO_IRQ_CUSTOM;
 789
 790         uinfo->open = cnic_uio_open;
 791         uinfo->release = cnic_uio_close;
 792
 793         uinfo->priv = dev;
 794
 795         ret = uio_register_device(&dev->pcidev->dev, uinfo);
 796         if (ret) {
 797                 kfree(uinfo);
 798                 goto error;
 799         }
 800
 801         cp->cnic_uinfo = uinfo;
 802
 803         return 0;
 804
 805 error:
 806         cnic_free_resc(dev);
 807         return ret;
 808 }
 809
 810 static inline u32 cnic_kwq_avail(struct cnic_local *cp)
 811 {
 812         return cp->max_kwq_idx -
 813                 ((cp->kwq_prod_idx - cp->kwq_con_idx) & cp->max_kwq_idx);
 814 }
 815
 816 static int cnic_submit_bnx2_kwqes(struct cnic_dev *dev, struct kwqe *wqes[],
 817                                   u32 num_wqes)
 818 {
 819         struct cnic_local *cp = dev->cnic_priv;
 820         struct kwqe *prod_qe;
 821         u16 prod, sw_prod, i;
 822
 823         if (!test_bit(CNIC_F_CNIC_UP, &dev->flags))
 824                 return -EAGAIN;         /* bnx2 is down */
 825
 826         spin_lock_bh(&cp->cnic_ulp_lock);
 827         if (num_wqes > cnic_kwq_avail(cp) &&
 828             !(cp->cnic_local_flags & CNIC_LCL_FL_KWQ_INIT)) {
 829                 spin_unlock_bh(&cp->cnic_ulp_lock);
 830                 return -EAGAIN;
 831         }
 832
 833         cp->cnic_local_flags &= ~CNIC_LCL_FL_KWQ_INIT;
 834
 835         prod = cp->kwq_prod_idx;
 836         sw_prod = prod & MAX_KWQ_IDX;
 837         for (i = 0; i < num_wqes; i++) {
 838                 prod_qe = &cp->kwq[KWQ_PG(sw_prod)][KWQ_IDX(sw_prod)];
 839                 memcpy(prod_qe, wqes[i], sizeof(struct kwqe));
 840                 prod++;
 841                 sw_prod = prod & MAX_KWQ_IDX;
 842         }
 843         cp->kwq_prod_idx = prod;
 844
 845         CNIC_WR16(dev, cp->kwq_io_addr, cp->kwq_prod_idx);
 846
 847         spin_unlock_bh(&cp->cnic_ulp_lock);
 848         return 0;
 849 }
 850
 851 static void service_kcqes(struct cnic_dev *dev, int num_cqes)
 852 {
 853         struct cnic_local *cp = dev->cnic_priv;
 854         int i, j;
 855
 856         i = 0;
 857         j = 1;
 858         while (num_cqes) {
 859                 struct cnic_ulp_ops *ulp_ops;
 860                 int ulp_type;
 861                 u32 kcqe_op_flag = cp->completed_kcq[i]->kcqe_op_flag;
 862                 u32 kcqe_layer = kcqe_op_flag & KCQE_FLAGS_LAYER_MASK;
 863
 864                 if (unlikely(kcqe_op_flag & KCQE_RAMROD_COMPLETION))
 865                         cnic_kwq_completion(dev, 1);
 866
 867                 while (j < num_cqes) {
 868                         u32 next_op = cp->completed_kcq[i + j]->kcqe_op_flag;
 869
 870                         if ((next_op & KCQE_FLAGS_LAYER_MASK) != kcqe_layer)
 871                                 break;
 872
 873                         if (unlikely(next_op & KCQE_RAMROD_COMPLETION))
 874                                 cnic_kwq_completion(dev, 1);
 875                         j++;
 876                 }
 877
 878                 if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_RDMA)
 879                         ulp_type = CNIC_ULP_RDMA;
 880                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_ISCSI)
 881                         ulp_type = CNIC_ULP_ISCSI;
 882                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L4)
 883                         ulp_type = CNIC_ULP_L4;
 884                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L2)
 885                         goto end;
 886                 else {
 887                         printk(KERN_ERR PFX "%s: Unknown type of KCQE(0x%x)\n",
 888                                dev->netdev->name, kcqe_op_flag);
 889                         goto end;
 890                 }
 891
 892                 rcu_read_lock();
 893                 ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
 894                 if (likely(ulp_ops)) {
 895                         ulp_ops->indicate_kcqes(cp->ulp_handle[ulp_type],
 896                                                   cp->completed_kcq + i, j);
 897                 }
 898                 rcu_read_unlock();
 899 end:
 900                 num_cqes -= j;
 901                 i += j;
 902                 j = 1;
 903         }
 904         return;
 905 }
 906
 907 static u16 cnic_bnx2_next_idx(u16 idx)
 908 {
 909         return idx + 1;
 910 }
 911
 912 static u16 cnic_bnx2_hw_idx(u16 idx)
 913 {
 914         return idx;
 915 }
 916
 917 static int cnic_get_kcqes(struct cnic_dev *dev, u16 hw_prod, u16 *sw_prod)
 918 {
 919         struct cnic_local *cp = dev->cnic_priv;
 920         u16 i, ri, last;
 921         struct kcqe *kcqe;
 922         int kcqe_cnt = 0, last_cnt = 0;
 923
 924         i = ri = last = *sw_prod;
 925         ri &= MAX_KCQ_IDX;
 926
 927         while ((i != hw_prod) && (kcqe_cnt < MAX_COMPLETED_KCQE)) {
 928                 kcqe = &cp->kcq[KCQ_PG(ri)][KCQ_IDX(ri)];
 929                 cp->completed_kcq[kcqe_cnt++] = kcqe;
 930                 i = cp->next_idx(i);
 931                 ri = i & MAX_KCQ_IDX;
 932                 if (likely(!(kcqe->kcqe_op_flag & KCQE_FLAGS_NEXT))) {
 933                         last_cnt = kcqe_cnt;
 934                         last = i;
 935                 }
 936         }
 937
 938         *sw_prod = last;
 939         return last_cnt;
 940 }
 941
 942 static void cnic_chk_bnx2_pkt_rings(struct cnic_local *cp)
 943 {
 944         u16 rx_cons = *cp->rx_cons_ptr;
 945         u16 tx_cons = *cp->tx_cons_ptr;
 946
 947         if (cp->tx_cons != tx_cons || cp->rx_cons != rx_cons) {
 948                 cp->tx_cons = tx_cons;
 949                 cp->rx_cons = rx_cons;
 950                 uio_event_notify(cp->cnic_uinfo);
 951         }
 952 }
 953
 954 static int cnic_service_bnx2(void *data, void *status_blk)
 955 {
 956         struct cnic_dev *dev = data;
 957         struct status_block *sblk = status_blk;
 958         struct cnic_local *cp = dev->cnic_priv;
 959         u32 status_idx = sblk->status_idx;
 960         u16 hw_prod, sw_prod;
 961         int kcqe_cnt;
 962
 963         if (unlikely(!test_bit(CNIC_F_CNIC_UP, &dev->flags)))
 964                 return status_idx;
 965
 966         cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
 967
 968         hw_prod = sblk->status_completion_producer_index;
 969         sw_prod = cp->kcq_prod_idx;
 970         while (sw_prod != hw_prod) {
 971                 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
 972                 if (kcqe_cnt == 0)
 973                         goto done;
 974
 975                 service_kcqes(dev, kcqe_cnt);
 976
 977                 /* Tell compiler that status_blk fields can change. */
 978                 barrier();
 979                 if (status_idx != sblk->status_idx) {
 980                         status_idx = sblk->status_idx;
 981                         cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
 982                         hw_prod = sblk->status_completion_producer_index;
 983                 } else
 984                         break;
 985         }
 986
 987 done:
 988         CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
 989
 990         cp->kcq_prod_idx = sw_prod;
 991
 992         cnic_chk_bnx2_pkt_rings(cp);
 993         return status_idx;
 994 }
 995
 996 static void cnic_service_bnx2_msix(unsigned long data)
 997 {
 998         struct cnic_dev *dev = (struct cnic_dev *) data;
 999         struct cnic_local *cp = dev->cnic_priv;
1000         struct status_block_msix *status_blk = cp->bnx2_status_blk;
1001         u32 status_idx = status_blk->status_idx;
1002         u16 hw_prod, sw_prod;
1003         int kcqe_cnt;
1004
1005         cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1006
1007         hw_prod = status_blk->status_completion_producer_index;
1008         sw_prod = cp->kcq_prod_idx;
1009         while (sw_prod != hw_prod) {
1010                 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
1011                 if (kcqe_cnt == 0)
1012                         goto done;
1013
1014                 service_kcqes(dev, kcqe_cnt);
1015
1016                 /* Tell compiler that status_blk fields can change. */
1017                 barrier();
1018                 if (status_idx != status_blk->status_idx) {
1019                         status_idx = status_blk->status_idx;
1020                         cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1021                         hw_prod = status_blk->status_completion_producer_index;
1022                 } else
1023                         break;
1024         }
1025
1026 done:
1027         CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
1028         cp->kcq_prod_idx = sw_prod;
1029
1030         cnic_chk_bnx2_pkt_rings(cp);
1031
1032         cp->last_status_idx = status_idx;
1033         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
1034                 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
1035 }
1036
1037 static irqreturn_t cnic_irq(int irq, void *dev_instance)
1038 {
1039         struct cnic_dev *dev = dev_instance;
1040         struct cnic_local *cp = dev->cnic_priv;
1041         u16 prod = cp->kcq_prod_idx & MAX_KCQ_IDX;
1042
1043         if (cp->ack_int)
1044                 cp->ack_int(dev);
1045
1046         prefetch(cp->status_blk);
1047         prefetch(&cp->kcq[KCQ_PG(prod)][KCQ_IDX(prod)]);
1048
1049         if (likely(test_bit(CNIC_F_CNIC_UP, &dev->flags)))
1050                 tasklet_schedule(&cp->cnic_irq_task);
1051
1052         return IRQ_HANDLED;
1053 }
1054
1055 static void cnic_ulp_stop(struct cnic_dev *dev)
1056 {
1057         struct cnic_local *cp = dev->cnic_priv;
1058         int if_type;
1059
1060         rcu_read_lock();
1061         for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
1062                 struct cnic_ulp_ops *ulp_ops;
1063
1064                 ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
1065                 if (!ulp_ops)
1066                         continue;
1067
1068                 if (test_and_clear_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1069                         ulp_ops->cnic_stop(cp->ulp_handle[if_type]);
1070         }
1071         rcu_read_unlock();
1072 }
1073
1074 static void cnic_ulp_start(struct cnic_dev *dev)
1075 {
1076         struct cnic_local *cp = dev->cnic_priv;
1077         int if_type;
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 || !ulp_ops->cnic_start)
1085                         continue;
1086
1087                 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1088                         ulp_ops->cnic_start(cp->ulp_handle[if_type]);
1089         }
1090         rcu_read_unlock();
1091 }
1092
1093 static int cnic_ctl(void *data, struct cnic_ctl_info *info)
1094 {
1095         struct cnic_dev *dev = data;
1096
1097         switch (info->cmd) {
1098         case CNIC_CTL_STOP_CMD:
1099                 cnic_hold(dev);
1100                 mutex_lock(&cnic_lock);
1101
1102                 cnic_ulp_stop(dev);
1103                 cnic_stop_hw(dev);
1104
1105                 mutex_unlock(&cnic_lock);
1106                 cnic_put(dev);
1107                 break;
1108         case CNIC_CTL_START_CMD:
1109                 cnic_hold(dev);
1110                 mutex_lock(&cnic_lock);
1111
1112                 if (!cnic_start_hw(dev))
1113                         cnic_ulp_start(dev);
1114
1115                 mutex_unlock(&cnic_lock);
1116                 cnic_put(dev);
1117                 break;
1118         default:
1119                 return -EINVAL;
1120         }
1121         return 0;
1122 }
1123
1124 static void cnic_ulp_init(struct cnic_dev *dev)
1125 {
1126         int i;
1127         struct cnic_local *cp = dev->cnic_priv;
1128
1129         rcu_read_lock();
1130         for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1131                 struct cnic_ulp_ops *ulp_ops;
1132
1133                 ulp_ops = rcu_dereference(cnic_ulp_tbl[i]);
1134                 if (!ulp_ops || !ulp_ops->cnic_init)
1135                         continue;
1136
1137                 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1138                         ulp_ops->cnic_init(dev);
1139
1140         }
1141         rcu_read_unlock();
1142 }
1143
1144 static void cnic_ulp_exit(struct cnic_dev *dev)
1145 {
1146         int i;
1147         struct cnic_local *cp = dev->cnic_priv;
1148
1149         rcu_read_lock();
1150         for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1151                 struct cnic_ulp_ops *ulp_ops;
1152
1153                 ulp_ops = rcu_dereference(cnic_ulp_tbl[i]);
1154                 if (!ulp_ops || !ulp_ops->cnic_exit)
1155                         continue;
1156
1157                 if (test_and_clear_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1158                         ulp_ops->cnic_exit(dev);
1159
1160         }
1161         rcu_read_unlock();
1162 }
1163
1164 static int cnic_cm_offload_pg(struct cnic_sock *csk)
1165 {
1166         struct cnic_dev *dev = csk->dev;
1167         struct l4_kwq_offload_pg *l4kwqe;
1168         struct kwqe *wqes[1];
1169
1170         l4kwqe = (struct l4_kwq_offload_pg *) &csk->kwqe1;
1171         memset(l4kwqe, 0, sizeof(*l4kwqe));
1172         wqes[0] = (struct kwqe *) l4kwqe;
1173
1174         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_OFFLOAD_PG;
1175         l4kwqe->flags =
1176                 L4_LAYER_CODE << L4_KWQ_OFFLOAD_PG_LAYER_CODE_SHIFT;
1177         l4kwqe->l2hdr_nbytes = ETH_HLEN;
1178
1179         l4kwqe->da0 = csk->ha[0];
1180         l4kwqe->da1 = csk->ha[1];
1181         l4kwqe->da2 = csk->ha[2];
1182         l4kwqe->da3 = csk->ha[3];
1183         l4kwqe->da4 = csk->ha[4];
1184         l4kwqe->da5 = csk->ha[5];
1185
1186         l4kwqe->sa0 = dev->mac_addr[0];
1187         l4kwqe->sa1 = dev->mac_addr[1];
1188         l4kwqe->sa2 = dev->mac_addr[2];
1189         l4kwqe->sa3 = dev->mac_addr[3];
1190         l4kwqe->sa4 = dev->mac_addr[4];
1191         l4kwqe->sa5 = dev->mac_addr[5];
1192
1193         l4kwqe->etype = ETH_P_IP;
1194         l4kwqe->ipid_count = DEF_IPID_COUNT;
1195         l4kwqe->host_opaque = csk->l5_cid;
1196
1197         if (csk->vlan_id) {
1198                 l4kwqe->pg_flags |= L4_KWQ_OFFLOAD_PG_VLAN_TAGGING;
1199                 l4kwqe->vlan_tag = csk->vlan_id;
1200                 l4kwqe->l2hdr_nbytes += 4;
1201         }
1202
1203         return dev->submit_kwqes(dev, wqes, 1);
1204 }
1205
1206 static int cnic_cm_update_pg(struct cnic_sock *csk)
1207 {
1208         struct cnic_dev *dev = csk->dev;
1209         struct l4_kwq_update_pg *l4kwqe;
1210         struct kwqe *wqes[1];
1211
1212         l4kwqe = (struct l4_kwq_update_pg *) &csk->kwqe1;
1213         memset(l4kwqe, 0, sizeof(*l4kwqe));
1214         wqes[0] = (struct kwqe *) l4kwqe;
1215
1216         l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPDATE_PG;
1217         l4kwqe->flags =
1218                 L4_LAYER_CODE << L4_KWQ_UPDATE_PG_LAYER_CODE_SHIFT;
1219         l4kwqe->pg_cid = csk->pg_cid;
1220
1221         l4kwqe->da0 = csk->ha[0];
1222         l4kwqe->da1 = csk->ha[1];
1223         l4kwqe->da2 = csk->ha[2];
1224         l4kwqe->da3 = csk->ha[3];
1225         l4kwqe->da4 = csk->ha[4];
1226         l4kwqe->da5 = csk->ha[5];
1227
1228         l4kwqe->pg_host_opaque = csk->l5_cid;
1229         l4kwqe->pg_valids = L4_KWQ_UPDATE_PG_VALIDS_DA;
1230
1231         return dev->submit_kwqes(dev, wqes, 1);
1232 }
1233
1234 static int cnic_cm_upload_pg(struct cnic_sock *csk)
1235 {
1236         struct cnic_dev *dev = csk->dev;
1237         struct l4_kwq_upload *l4kwqe;
1238         struct kwqe *wqes[1];
1239
1240         l4kwqe = (struct l4_kwq_upload *) &csk->kwqe1;
1241         memset(l4kwqe, 0, sizeof(*l4kwqe));
1242         wqes[0] = (struct kwqe *) l4kwqe;
1243
1244         l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPLOAD_PG;
1245         l4kwqe->flags =
1246                 L4_LAYER_CODE << L4_KWQ_UPLOAD_LAYER_CODE_SHIFT;
1247         l4kwqe->cid = csk->pg_cid;
1248
1249         return dev->submit_kwqes(dev, wqes, 1);
1250 }
1251
1252 static int cnic_cm_conn_req(struct cnic_sock *csk)
1253 {
1254         struct cnic_dev *dev = csk->dev;
1255         struct l4_kwq_connect_req1 *l4kwqe1;
1256         struct l4_kwq_connect_req2 *l4kwqe2;
1257         struct l4_kwq_connect_req3 *l4kwqe3;
1258         struct kwqe *wqes[3];
1259         u8 tcp_flags = 0;
1260         int num_wqes = 2;
1261
1262         l4kwqe1 = (struct l4_kwq_connect_req1 *) &csk->kwqe1;
1263         l4kwqe2 = (struct l4_kwq_connect_req2 *) &csk->kwqe2;
1264         l4kwqe3 = (struct l4_kwq_connect_req3 *) &csk->kwqe3;
1265         memset(l4kwqe1, 0, sizeof(*l4kwqe1));
1266         memset(l4kwqe2, 0, sizeof(*l4kwqe2));
1267         memset(l4kwqe3, 0, sizeof(*l4kwqe3));
1268
1269         l4kwqe3->op_code = L4_KWQE_OPCODE_VALUE_CONNECT3;
1270         l4kwqe3->flags =
1271                 L4_LAYER_CODE << L4_KWQ_CONNECT_REQ3_LAYER_CODE_SHIFT;
1272         l4kwqe3->ka_timeout = csk->ka_timeout;
1273         l4kwqe3->ka_interval = csk->ka_interval;
1274         l4kwqe3->ka_max_probe_count = csk->ka_max_probe_count;
1275         l4kwqe3->tos = csk->tos;
1276         l4kwqe3->ttl = csk->ttl;
1277         l4kwqe3->snd_seq_scale = csk->snd_seq_scale;
1278         l4kwqe3->pmtu = csk->mtu;
1279         l4kwqe3->rcv_buf = csk->rcv_buf;
1280         l4kwqe3->snd_buf = csk->snd_buf;
1281         l4kwqe3->seed = csk->seed;
1282
1283         wqes[0] = (struct kwqe *) l4kwqe1;
1284         if (test_bit(SK_F_IPV6, &csk->flags)) {
1285                 wqes[1] = (struct kwqe *) l4kwqe2;
1286                 wqes[2] = (struct kwqe *) l4kwqe3;
1287                 num_wqes = 3;
1288
1289                 l4kwqe1->conn_flags = L4_KWQ_CONNECT_REQ1_IP_V6;
1290                 l4kwqe2->op_code = L4_KWQE_OPCODE_VALUE_CONNECT2;
1291                 l4kwqe2->flags =
1292                         L4_KWQ_CONNECT_REQ2_LINKED_WITH_NEXT |
1293                         L4_LAYER_CODE << L4_KWQ_CONNECT_REQ2_LAYER_CODE_SHIFT;
1294                 l4kwqe2->src_ip_v6_2 = be32_to_cpu(csk->src_ip[1]);
1295                 l4kwqe2->src_ip_v6_3 = be32_to_cpu(csk->src_ip[2]);
1296                 l4kwqe2->src_ip_v6_4 = be32_to_cpu(csk->src_ip[3]);
1297                 l4kwqe2->dst_ip_v6_2 = be32_to_cpu(csk->dst_ip[1]);
1298                 l4kwqe2->dst_ip_v6_3 = be32_to_cpu(csk->dst_ip[2]);
1299                 l4kwqe2->dst_ip_v6_4 = be32_to_cpu(csk->dst_ip[3]);
1300                 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct ipv6hdr) -
1301                                sizeof(struct tcphdr);
1302         } else {
1303                 wqes[1] = (struct kwqe *) l4kwqe3;
1304                 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct iphdr) -
1305                                sizeof(struct tcphdr);
1306         }
1307
1308         l4kwqe1->op_code = L4_KWQE_OPCODE_VALUE_CONNECT1;
1309         l4kwqe1->flags =
1310                 (L4_LAYER_CODE << L4_KWQ_CONNECT_REQ1_LAYER_CODE_SHIFT) |
1311                  L4_KWQ_CONNECT_REQ3_LINKED_WITH_NEXT;
1312         l4kwqe1->cid = csk->cid;
1313         l4kwqe1->pg_cid = csk->pg_cid;
1314         l4kwqe1->src_ip = be32_to_cpu(csk->src_ip[0]);
1315         l4kwqe1->dst_ip = be32_to_cpu(csk->dst_ip[0]);
1316         l4kwqe1->src_port = be16_to_cpu(csk->src_port);
1317         l4kwqe1->dst_port = be16_to_cpu(csk->dst_port);
1318         if (csk->tcp_flags & SK_TCP_NO_DELAY_ACK)
1319                 tcp_flags |= L4_KWQ_CONNECT_REQ1_NO_DELAY_ACK;
1320         if (csk->tcp_flags & SK_TCP_KEEP_ALIVE)
1321                 tcp_flags |= L4_KWQ_CONNECT_REQ1_KEEP_ALIVE;
1322         if (csk->tcp_flags & SK_TCP_NAGLE)
1323                 tcp_flags |= L4_KWQ_CONNECT_REQ1_NAGLE_ENABLE;
1324         if (csk->tcp_flags & SK_TCP_TIMESTAMP)
1325                 tcp_flags |= L4_KWQ_CONNECT_REQ1_TIME_STAMP;
1326         if (csk->tcp_flags & SK_TCP_SACK)
1327                 tcp_flags |= L4_KWQ_CONNECT_REQ1_SACK;
1328         if (csk->tcp_flags & SK_TCP_SEG_SCALING)
1329                 tcp_flags |= L4_KWQ_CONNECT_REQ1_SEG_SCALING;
1330
1331         l4kwqe1->tcp_flags = tcp_flags;
1332
1333         return dev->submit_kwqes(dev, wqes, num_wqes);
1334 }
1335
1336 static int cnic_cm_close_req(struct cnic_sock *csk)
1337 {
1338         struct cnic_dev *dev = csk->dev;
1339         struct l4_kwq_close_req *l4kwqe;
1340         struct kwqe *wqes[1];
1341
1342         l4kwqe = (struct l4_kwq_close_req *) &csk->kwqe2;
1343         memset(l4kwqe, 0, sizeof(*l4kwqe));
1344         wqes[0] = (struct kwqe *) l4kwqe;
1345
1346         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_CLOSE;
1347         l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_CLOSE_REQ_LAYER_CODE_SHIFT;
1348         l4kwqe->cid = csk->cid;
1349
1350         return dev->submit_kwqes(dev, wqes, 1);
1351 }
1352
1353 static int cnic_cm_abort_req(struct cnic_sock *csk)
1354 {
1355         struct cnic_dev *dev = csk->dev;
1356         struct l4_kwq_reset_req *l4kwqe;
1357         struct kwqe *wqes[1];
1358
1359         l4kwqe = (struct l4_kwq_reset_req *) &csk->kwqe2;
1360         memset(l4kwqe, 0, sizeof(*l4kwqe));
1361         wqes[0] = (struct kwqe *) l4kwqe;
1362
1363         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_RESET;
1364         l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_RESET_REQ_LAYER_CODE_SHIFT;
1365         l4kwqe->cid = csk->cid;
1366
1367         return dev->submit_kwqes(dev, wqes, 1);
1368 }
1369
1370 static int cnic_cm_create(struct cnic_dev *dev, int ulp_type, u32 cid,
1371                           u32 l5_cid, struct cnic_sock **csk, void *context)
1372 {
1373         struct cnic_local *cp = dev->cnic_priv;
1374         struct cnic_sock *csk1;
1375
1376         if (l5_cid >= MAX_CM_SK_TBL_SZ)
1377                 return -EINVAL;
1378
1379         csk1 = &cp->csk_tbl[l5_cid];
1380         if (atomic_read(&csk1->ref_count))
1381                 return -EAGAIN;
1382
1383         if (test_and_set_bit(SK_F_INUSE, &csk1->flags))
1384                 return -EBUSY;
1385
1386         csk1->dev = dev;
1387         csk1->cid = cid;
1388         csk1->l5_cid = l5_cid;
1389         csk1->ulp_type = ulp_type;
1390         csk1->context = context;
1391
1392         csk1->ka_timeout = DEF_KA_TIMEOUT;
1393         csk1->ka_interval = DEF_KA_INTERVAL;
1394         csk1->ka_max_probe_count = DEF_KA_MAX_PROBE_COUNT;
1395         csk1->tos = DEF_TOS;
1396         csk1->ttl = DEF_TTL;
1397         csk1->snd_seq_scale = DEF_SND_SEQ_SCALE;
1398         csk1->rcv_buf = DEF_RCV_BUF;
1399         csk1->snd_buf = DEF_SND_BUF;
1400         csk1->seed = DEF_SEED;
1401
1402         *csk = csk1;
1403         return 0;
1404 }
1405
1406 static void cnic_cm_cleanup(struct cnic_sock *csk)
1407 {
1408         if (csk->src_port) {
1409                 struct cnic_dev *dev = csk->dev;
1410                 struct cnic_local *cp = dev->cnic_priv;
1411
1412                 cnic_free_id(&cp->csk_port_tbl, csk->src_port);
1413                 csk->src_port = 0;
1414         }
1415 }
1416
1417 static void cnic_close_conn(struct cnic_sock *csk)
1418 {
1419         if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags)) {
1420                 cnic_cm_upload_pg(csk);
1421                 clear_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1422         }
1423         cnic_cm_cleanup(csk);
1424 }
1425
1426 static int cnic_cm_destroy(struct cnic_sock *csk)
1427 {
1428         if (!cnic_in_use(csk))
1429                 return -EINVAL;
1430
1431         csk_hold(csk);
1432         clear_bit(SK_F_INUSE, &csk->flags);
1433         smp_mb__after_clear_bit();
1434         while (atomic_read(&csk->ref_count) != 1)
1435                 msleep(1);
1436         cnic_cm_cleanup(csk);
1437
1438         csk->flags = 0;
1439         csk_put(csk);
1440         return 0;
1441 }
1442
1443 static inline u16 cnic_get_vlan(struct net_device *dev,
1444                                 struct net_device **vlan_dev)
1445 {
1446         if (dev->priv_flags & IFF_802_1Q_VLAN) {
1447                 *vlan_dev = vlan_dev_real_dev(dev);
1448                 return vlan_dev_vlan_id(dev);
1449         }
1450         *vlan_dev = dev;
1451         return 0;
1452 }
1453
1454 static int cnic_get_v4_route(struct sockaddr_in *dst_addr,
1455                              struct dst_entry **dst)
1456 {
1457 #if defined(CONFIG_INET)
1458         struct flowi fl;
1459         int err;
1460         struct rtable *rt;
1461
1462         memset(&fl, 0, sizeof(fl));
1463         fl.nl_u.ip4_u.daddr = dst_addr->sin_addr.s_addr;
1464
1465         err = ip_route_output_key(&init_net, &rt, &fl);
1466         if (!err)
1467                 *dst = &rt->u.dst;
1468         return err;
1469 #else
1470         return -ENETUNREACH;
1471 #endif
1472 }
1473
1474 static int cnic_get_v6_route(struct sockaddr_in6 *dst_addr,
1475                              struct dst_entry **dst)
1476 {
1477 #if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
1478         struct flowi fl;
1479
1480         memset(&fl, 0, sizeof(fl));
1481         ipv6_addr_copy(&fl.fl6_dst, &dst_addr->sin6_addr);
1482         if (ipv6_addr_type(&fl.fl6_dst) & IPV6_ADDR_LINKLOCAL)
1483                 fl.oif = dst_addr->sin6_scope_id;
1484
1485         *dst = ip6_route_output(&init_net, NULL, &fl);
1486         if (*dst)
1487                 return 0;
1488 #endif
1489
1490         return -ENETUNREACH;
1491 }
1492
1493 static struct cnic_dev *cnic_cm_select_dev(struct sockaddr_in *dst_addr,
1494                                            int ulp_type)
1495 {
1496         struct cnic_dev *dev = NULL;
1497         struct dst_entry *dst;
1498         struct net_device *netdev = NULL;
1499         int err = -ENETUNREACH;
1500
1501         if (dst_addr->sin_family == AF_INET)
1502                 err = cnic_get_v4_route(dst_addr, &dst);
1503         else if (dst_addr->sin_family == AF_INET6) {
1504                 struct sockaddr_in6 *dst_addr6 =
1505                         (struct sockaddr_in6 *) dst_addr;
1506
1507                 err = cnic_get_v6_route(dst_addr6, &dst);
1508         } else
1509                 return NULL;
1510
1511         if (err)
1512                 return NULL;
1513
1514         if (!dst->dev)
1515                 goto done;
1516
1517         cnic_get_vlan(dst->dev, &netdev);
1518
1519         dev = cnic_from_netdev(netdev);
1520
1521 done:
1522         dst_release(dst);
1523         if (dev)
1524                 cnic_put(dev);
1525         return dev;
1526 }
1527
1528 static int cnic_resolve_addr(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1529 {
1530         struct cnic_dev *dev = csk->dev;
1531         struct cnic_local *cp = dev->cnic_priv;
1532
1533         return cnic_send_nlmsg(cp, ISCSI_KEVENT_PATH_REQ, csk);
1534 }
1535
1536 static int cnic_get_route(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1537 {
1538         struct cnic_dev *dev = csk->dev;
1539         struct cnic_local *cp = dev->cnic_priv;
1540         int is_v6, err, rc = -ENETUNREACH;
1541         struct dst_entry *dst;
1542         struct net_device *realdev;
1543         u32 local_port;
1544
1545         if (saddr->local.v6.sin6_family == AF_INET6 &&
1546             saddr->remote.v6.sin6_family == AF_INET6)
1547                 is_v6 = 1;
1548         else if (saddr->local.v4.sin_family == AF_INET &&
1549                  saddr->remote.v4.sin_family == AF_INET)
1550                 is_v6 = 0;
1551         else
1552                 return -EINVAL;
1553
1554         clear_bit(SK_F_IPV6, &csk->flags);
1555
1556         if (is_v6) {
1557 #if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
1558                 set_bit(SK_F_IPV6, &csk->flags);
1559                 err = cnic_get_v6_route(&saddr->remote.v6, &dst);
1560                 if (err)
1561                         return err;
1562
1563                 if (!dst || dst->error || !dst->dev)
1564                         goto err_out;
1565
1566                 memcpy(&csk->dst_ip[0], &saddr->remote.v6.sin6_addr,
1567                        sizeof(struct in6_addr));
1568                 csk->dst_port = saddr->remote.v6.sin6_port;
1569                 local_port = saddr->local.v6.sin6_port;
1570 #else
1571                 return rc;
1572 #endif
1573
1574         } else {
1575                 err = cnic_get_v4_route(&saddr->remote.v4, &dst);
1576                 if (err)
1577                         return err;
1578
1579                 if (!dst || dst->error || !dst->dev)
1580                         goto err_out;
1581
1582                 csk->dst_ip[0] = saddr->remote.v4.sin_addr.s_addr;
1583                 csk->dst_port = saddr->remote.v4.sin_port;
1584                 local_port = saddr->local.v4.sin_port;
1585         }
1586
1587         csk->vlan_id = cnic_get_vlan(dst->dev, &realdev);
1588         if (realdev != dev->netdev)
1589                 goto err_out;
1590
1591         if (local_port >= CNIC_LOCAL_PORT_MIN &&
1592             local_port < CNIC_LOCAL_PORT_MAX) {
1593                 if (cnic_alloc_id(&cp->csk_port_tbl, local_port))
1594                         local_port = 0;
1595         } else
1596                 local_port = 0;
1597
1598         if (!local_port) {
1599                 local_port = cnic_alloc_new_id(&cp->csk_port_tbl);
1600                 if (local_port == -1) {
1601                         rc = -ENOMEM;
1602                         goto err_out;
1603                 }
1604         }
1605         csk->src_port = local_port;
1606
1607         csk->mtu = dst_mtu(dst);
1608         rc = 0;
1609
1610 err_out:
1611         dst_release(dst);
1612         return rc;
1613 }
1614
1615 static void cnic_init_csk_state(struct cnic_sock *csk)
1616 {
1617         csk->state = 0;
1618         clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1619         clear_bit(SK_F_CLOSING, &csk->flags);
1620 }
1621
1622 static int cnic_cm_connect(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1623 {
1624         int err = 0;
1625
1626         if (!cnic_in_use(csk))
1627                 return -EINVAL;
1628
1629         if (test_and_set_bit(SK_F_CONNECT_START, &csk->flags))
1630                 return -EINVAL;
1631
1632         cnic_init_csk_state(csk);
1633
1634         err = cnic_get_route(csk, saddr);
1635         if (err)
1636                 goto err_out;
1637
1638         err = cnic_resolve_addr(csk, saddr);
1639         if (!err)
1640                 return 0;
1641
1642 err_out:
1643         clear_bit(SK_F_CONNECT_START, &csk->flags);
1644         return err;
1645 }
1646
1647 static int cnic_cm_abort(struct cnic_sock *csk)
1648 {
1649         struct cnic_local *cp = csk->dev->cnic_priv;
1650         u32 opcode;
1651
1652         if (!cnic_in_use(csk))
1653                 return -EINVAL;
1654
1655         if (cnic_abort_prep(csk))
1656                 return cnic_cm_abort_req(csk);
1657
1658         /* Getting here means that we haven't started connect, or
1659          * connect was not successful.
1660          */
1661
1662         csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
1663         if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1664                 opcode = csk->state;
1665         else
1666                 opcode = L5CM_RAMROD_CMD_ID_TERMINATE_OFFLOAD;
1667         cp->close_conn(csk, opcode);
1668
1669         return 0;
1670 }
1671
1672 static int cnic_cm_close(struct cnic_sock *csk)
1673 {
1674         if (!cnic_in_use(csk))
1675                 return -EINVAL;
1676
1677         if (cnic_close_prep(csk)) {
1678                 csk->state = L4_KCQE_OPCODE_VALUE_CLOSE_COMP;
1679                 return cnic_cm_close_req(csk);
1680         }
1681         return 0;
1682 }
1683
1684 static void cnic_cm_upcall(struct cnic_local *cp, struct cnic_sock *csk,
1685                            u8 opcode)
1686 {
1687         struct cnic_ulp_ops *ulp_ops;
1688         int ulp_type = csk->ulp_type;
1689
1690         rcu_read_lock();
1691         ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
1692         if (ulp_ops) {
1693                 if (opcode == L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE)
1694                         ulp_ops->cm_connect_complete(csk);
1695                 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)
1696                         ulp_ops->cm_close_complete(csk);
1697                 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED)
1698                         ulp_ops->cm_remote_abort(csk);
1699                 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_COMP)
1700                         ulp_ops->cm_abort_complete(csk);
1701                 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED)
1702                         ulp_ops->cm_remote_close(csk);
1703         }
1704         rcu_read_unlock();
1705 }
1706
1707 static int cnic_cm_set_pg(struct cnic_sock *csk)
1708 {
1709         if (cnic_offld_prep(csk)) {
1710                 if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1711                         cnic_cm_update_pg(csk);
1712                 else
1713                         cnic_cm_offload_pg(csk);
1714         }
1715         return 0;
1716 }
1717
1718 static void cnic_cm_process_offld_pg(struct cnic_dev *dev, struct l4_kcq *kcqe)
1719 {
1720         struct cnic_local *cp = dev->cnic_priv;
1721         u32 l5_cid = kcqe->pg_host_opaque;
1722         u8 opcode = kcqe->op_code;
1723         struct cnic_sock *csk = &cp->csk_tbl[l5_cid];
1724
1725         csk_hold(csk);
1726         if (!cnic_in_use(csk))
1727                 goto done;
1728
1729         if (opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1730                 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1731                 goto done;
1732         }
1733         csk->pg_cid = kcqe->pg_cid;
1734         set_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1735         cnic_cm_conn_req(csk);
1736
1737 done:
1738         csk_put(csk);
1739 }
1740
1741 static void cnic_cm_process_kcqe(struct cnic_dev *dev, struct kcqe *kcqe)
1742 {
1743         struct cnic_local *cp = dev->cnic_priv;
1744         struct l4_kcq *l4kcqe = (struct l4_kcq *) kcqe;
1745         u8 opcode = l4kcqe->op_code;
1746         u32 l5_cid;
1747         struct cnic_sock *csk;
1748
1749         if (opcode == L4_KCQE_OPCODE_VALUE_OFFLOAD_PG ||
1750             opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1751                 cnic_cm_process_offld_pg(dev, l4kcqe);
1752                 return;
1753         }
1754
1755         l5_cid = l4kcqe->conn_id;
1756         if (opcode & 0x80)
1757                 l5_cid = l4kcqe->cid;
1758         if (l5_cid >= MAX_CM_SK_TBL_SZ)
1759                 return;
1760
1761         csk = &cp->csk_tbl[l5_cid];
1762         csk_hold(csk);
1763
1764         if (!cnic_in_use(csk)) {
1765                 csk_put(csk);
1766                 return;
1767         }
1768
1769         switch (opcode) {
1770         case L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE:
1771                 if (l4kcqe->status == 0)
1772                         set_bit(SK_F_OFFLD_COMPLETE, &csk->flags);
1773
1774                 smp_mb__before_clear_bit();
1775                 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1776                 cnic_cm_upcall(cp, csk, opcode);
1777                 break;
1778
1779         case L4_KCQE_OPCODE_VALUE_RESET_RECEIVED:
1780                 if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags))
1781                         csk->state = opcode;
1782                 /* fall through */
1783         case L4_KCQE_OPCODE_VALUE_CLOSE_COMP:
1784         case L4_KCQE_OPCODE_VALUE_RESET_COMP:
1785                 cp->close_conn(csk, opcode);
1786                 break;
1787
1788         case L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED:
1789                 cnic_cm_upcall(cp, csk, opcode);
1790                 break;
1791         }
1792         csk_put(csk);
1793 }
1794
1795 static void cnic_cm_indicate_kcqe(void *data, struct kcqe *kcqe[], u32 num)
1796 {
1797         struct cnic_dev *dev = data;
1798         int i;
1799
1800         for (i = 0; i < num; i++)
1801                 cnic_cm_process_kcqe(dev, kcqe[i]);
1802 }
1803
1804 static struct cnic_ulp_ops cm_ulp_ops = {
1805         .indicate_kcqes         = cnic_cm_indicate_kcqe,
1806 };
1807
1808 static void cnic_cm_free_mem(struct cnic_dev *dev)
1809 {
1810         struct cnic_local *cp = dev->cnic_priv;
1811
1812         kfree(cp->csk_tbl);
1813         cp->csk_tbl = NULL;
1814         cnic_free_id_tbl(&cp->csk_port_tbl);
1815 }
1816
1817 static int cnic_cm_alloc_mem(struct cnic_dev *dev)
1818 {
1819         struct cnic_local *cp = dev->cnic_priv;
1820
1821         cp->csk_tbl = kzalloc(sizeof(struct cnic_sock) * MAX_CM_SK_TBL_SZ,
1822                               GFP_KERNEL);
1823         if (!cp->csk_tbl)
1824                 return -ENOMEM;
1825
1826         if (cnic_init_id_tbl(&cp->csk_port_tbl, CNIC_LOCAL_PORT_RANGE,
1827                              CNIC_LOCAL_PORT_MIN)) {
1828                 cnic_cm_free_mem(dev);
1829                 return -ENOMEM;
1830         }
1831         return 0;
1832 }
1833
1834 static int cnic_ready_to_close(struct cnic_sock *csk, u32 opcode)
1835 {
1836         if ((opcode == csk->state) ||
1837             (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED &&
1838              csk->state == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)) {
1839                 if (!test_and_set_bit(SK_F_CLOSING, &csk->flags))
1840                         return 1;
1841         }
1842         return 0;
1843 }
1844
1845 static void cnic_close_bnx2_conn(struct cnic_sock *csk, u32 opcode)
1846 {
1847         struct cnic_dev *dev = csk->dev;
1848         struct cnic_local *cp = dev->cnic_priv;
1849
1850         clear_bit(SK_F_CONNECT_START, &csk->flags);
1851         if (cnic_ready_to_close(csk, opcode)) {
1852                 cnic_close_conn(csk);
1853                 cnic_cm_upcall(cp, csk, opcode);
1854         }
1855 }
1856
1857 static void cnic_cm_stop_bnx2_hw(struct cnic_dev *dev)
1858 {
1859 }
1860
1861 static int cnic_cm_init_bnx2_hw(struct cnic_dev *dev)
1862 {
1863         u32 seed;
1864
1865         get_random_bytes(&seed, 4);
1866         cnic_ctx_wr(dev, 45, 0, seed);
1867         return 0;
1868 }
1869
1870 static int cnic_cm_open(struct cnic_dev *dev)
1871 {
1872         struct cnic_local *cp = dev->cnic_priv;
1873         int err;
1874
1875         err = cnic_cm_alloc_mem(dev);
1876         if (err)
1877                 return err;
1878
1879         err = cp->start_cm(dev);
1880
1881         if (err)
1882                 goto err_out;
1883
1884         dev->cm_create = cnic_cm_create;
1885         dev->cm_destroy = cnic_cm_destroy;
1886         dev->cm_connect = cnic_cm_connect;
1887         dev->cm_abort = cnic_cm_abort;
1888         dev->cm_close = cnic_cm_close;
1889         dev->cm_select_dev = cnic_cm_select_dev;
1890
1891         cp->ulp_handle[CNIC_ULP_L4] = dev;
1892         rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], &cm_ulp_ops);
1893         return 0;
1894
1895 err_out:
1896         cnic_cm_free_mem(dev);
1897         return err;
1898 }
1899
1900 static int cnic_cm_shutdown(struct cnic_dev *dev)
1901 {
1902         struct cnic_local *cp = dev->cnic_priv;
1903         int i;
1904
1905         cp->stop_cm(dev);
1906
1907         if (!cp->csk_tbl)
1908                 return 0;
1909
1910         for (i = 0; i < MAX_CM_SK_TBL_SZ; i++) {
1911                 struct cnic_sock *csk = &cp->csk_tbl[i];
1912
1913                 clear_bit(SK_F_INUSE, &csk->flags);
1914                 cnic_cm_cleanup(csk);
1915         }
1916         cnic_cm_free_mem(dev);
1917
1918         return 0;
1919 }
1920
1921 static void cnic_init_context(struct cnic_dev *dev, u32 cid)
1922 {
1923         struct cnic_local *cp = dev->cnic_priv;
1924         u32 cid_addr;
1925         int i;
1926
1927         if (CHIP_NUM(cp) == CHIP_NUM_5709)
1928                 return;
1929
1930         cid_addr = GET_CID_ADDR(cid);
1931
1932         for (i = 0; i < CTX_SIZE; i += 4)
1933                 cnic_ctx_wr(dev, cid_addr, i, 0);
1934 }
1935
1936 static int cnic_setup_5709_context(struct cnic_dev *dev, int valid)
1937 {
1938         struct cnic_local *cp = dev->cnic_priv;
1939         int ret = 0, i;
1940         u32 valid_bit = valid ? BNX2_CTX_HOST_PAGE_TBL_DATA0_VALID : 0;
1941
1942         if (CHIP_NUM(cp) != CHIP_NUM_5709)
1943                 return 0;
1944
1945         for (i = 0; i < cp->ctx_blks; i++) {
1946                 int j;
1947                 u32 idx = cp->ctx_arr[i].cid / cp->cids_per_blk;
1948                 u32 val;
1949
1950                 memset(cp->ctx_arr[i].ctx, 0, BCM_PAGE_SIZE);
1951
1952                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA0,
1953                         (cp->ctx_arr[i].mapping & 0xffffffff) | valid_bit);
1954                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA1,
1955                         (u64) cp->ctx_arr[i].mapping >> 32);
1956                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL, idx |
1957                         BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ);
1958                 for (j = 0; j < 10; j++) {
1959
1960                         val = CNIC_RD(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL);
1961                         if (!(val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ))
1962                                 break;
1963                         udelay(5);
1964                 }
1965                 if (val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ) {
1966                         ret = -EBUSY;
1967                         break;
1968                 }
1969         }
1970         return ret;
1971 }
1972
1973 static void cnic_free_irq(struct cnic_dev *dev)
1974 {
1975         struct cnic_local *cp = dev->cnic_priv;
1976         struct cnic_eth_dev *ethdev = cp->ethdev;
1977
1978         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
1979                 cp->disable_int_sync(dev);
1980                 tasklet_disable(&cp->cnic_irq_task);
1981                 free_irq(ethdev->irq_arr[0].vector, dev);
1982         }
1983 }
1984
1985 static int cnic_init_bnx2_irq(struct cnic_dev *dev)
1986 {
1987         struct cnic_local *cp = dev->cnic_priv;
1988         struct cnic_eth_dev *ethdev = cp->ethdev;
1989
1990         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
1991                 int err, i = 0;
1992                 int sblk_num = cp->status_blk_num;
1993                 u32 base = ((sblk_num - 1) * BNX2_HC_SB_CONFIG_SIZE) +
1994                            BNX2_HC_SB_CONFIG_1;
1995
1996                 CNIC_WR(dev, base, BNX2_HC_SB_CONFIG_1_ONE_SHOT);
1997
1998                 CNIC_WR(dev, base + BNX2_HC_COMP_PROD_TRIP_OFF, (2 << 16) | 8);
1999                 CNIC_WR(dev, base + BNX2_HC_COM_TICKS_OFF, (64 << 16) | 220);
2000                 CNIC_WR(dev, base + BNX2_HC_CMD_TICKS_OFF, (64 << 16) | 220);
2001
2002                 cp->bnx2_status_blk = cp->status_blk;
2003                 cp->last_status_idx = cp->bnx2_status_blk->status_idx;
2004                 tasklet_init(&cp->cnic_irq_task, &cnic_service_bnx2_msix,
2005                              (unsigned long) dev);
2006                 err = request_irq(ethdev->irq_arr[0].vector, cnic_irq, 0,
2007                                   "cnic", dev);
2008                 if (err) {
2009                         tasklet_disable(&cp->cnic_irq_task);
2010                         return err;
2011                 }
2012                 while (cp->bnx2_status_blk->status_completion_producer_index &&
2013                        i < 10) {
2014                         CNIC_WR(dev, BNX2_HC_COALESCE_NOW,
2015                                 1 << (11 + sblk_num));
2016                         udelay(10);
2017                         i++;
2018                         barrier();
2019                 }
2020                 if (cp->bnx2_status_blk->status_completion_producer_index) {
2021                         cnic_free_irq(dev);
2022                         goto failed;
2023                 }
2024
2025         } else {
2026                 struct status_block *sblk = cp->status_blk;
2027                 u32 hc_cmd = CNIC_RD(dev, BNX2_HC_COMMAND);
2028                 int i = 0;
2029
2030                 while (sblk->status_completion_producer_index && i < 10) {
2031                         CNIC_WR(dev, BNX2_HC_COMMAND,
2032                                 hc_cmd | BNX2_HC_COMMAND_COAL_NOW_WO_INT);
2033                         udelay(10);
2034                         i++;
2035                         barrier();
2036                 }
2037                 if (sblk->status_completion_producer_index)
2038                         goto failed;
2039
2040         }
2041         return 0;
2042
2043 failed:
2044         printk(KERN_ERR PFX "%s: " "KCQ index not resetting to 0.\n",
2045                dev->netdev->name);
2046         return -EBUSY;
2047 }
2048
2049 static void cnic_enable_bnx2_int(struct cnic_dev *dev)
2050 {
2051         struct cnic_local *cp = dev->cnic_priv;
2052         struct cnic_eth_dev *ethdev = cp->ethdev;
2053
2054         if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
2055                 return;
2056
2057         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2058                 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
2059 }
2060
2061 static void cnic_disable_bnx2_int_sync(struct cnic_dev *dev)
2062 {
2063         struct cnic_local *cp = dev->cnic_priv;
2064         struct cnic_eth_dev *ethdev = cp->ethdev;
2065
2066         if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
2067                 return;
2068
2069         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2070                 BNX2_PCICFG_INT_ACK_CMD_MASK_INT);
2071         CNIC_RD(dev, BNX2_PCICFG_INT_ACK_CMD);
2072         synchronize_irq(ethdev->irq_arr[0].vector);
2073 }
2074
2075 static void cnic_init_bnx2_tx_ring(struct cnic_dev *dev)
2076 {
2077         struct cnic_local *cp = dev->cnic_priv;
2078         struct cnic_eth_dev *ethdev = cp->ethdev;
2079         u32 cid_addr, tx_cid, sb_id;
2080         u32 val, offset0, offset1, offset2, offset3;
2081         int i;
2082         struct tx_bd *txbd;
2083         dma_addr_t buf_map;
2084         struct status_block *s_blk = cp->status_blk;
2085
2086         sb_id = cp->status_blk_num;
2087         tx_cid = 20;
2088         cnic_init_context(dev, tx_cid);
2089         cnic_init_context(dev, tx_cid + 1);
2090         cp->tx_cons_ptr = &s_blk->status_tx_quick_consumer_index2;
2091         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2092                 struct status_block_msix *sblk = cp->status_blk;
2093
2094                 tx_cid = TX_TSS_CID + sb_id - 1;
2095                 cnic_init_context(dev, tx_cid);
2096                 CNIC_WR(dev, BNX2_TSCH_TSS_CFG, (sb_id << 24) |
2097                         (TX_TSS_CID << 7));
2098                 cp->tx_cons_ptr = &sblk->status_tx_quick_consumer_index;
2099         }
2100         cp->tx_cons = *cp->tx_cons_ptr;
2101
2102         cid_addr = GET_CID_ADDR(tx_cid);
2103         if (CHIP_NUM(cp) == CHIP_NUM_5709) {
2104                 u32 cid_addr2 = GET_CID_ADDR(tx_cid + 4) + 0x40;
2105
2106                 for (i = 0; i < PHY_CTX_SIZE; i += 4)
2107                         cnic_ctx_wr(dev, cid_addr2, i, 0);
2108
2109                 offset0 = BNX2_L2CTX_TYPE_XI;
2110                 offset1 = BNX2_L2CTX_CMD_TYPE_XI;
2111                 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI_XI;
2112                 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO_XI;
2113         } else {
2114                 offset0 = BNX2_L2CTX_TYPE;
2115                 offset1 = BNX2_L2CTX_CMD_TYPE;
2116                 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI;
2117                 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO;
2118         }
2119         val = BNX2_L2CTX_TYPE_TYPE_L2 | BNX2_L2CTX_TYPE_SIZE_L2;
2120         cnic_ctx_wr(dev, cid_addr, offset0, val);
2121
2122         val = BNX2_L2CTX_CMD_TYPE_TYPE_L2 | (8 << 16);
2123         cnic_ctx_wr(dev, cid_addr, offset1, val);
2124
2125         txbd = (struct tx_bd *) cp->l2_ring;
2126
2127         buf_map = cp->l2_buf_map;
2128         for (i = 0; i < MAX_TX_DESC_CNT; i++, txbd++) {
2129                 txbd->tx_bd_haddr_hi = (u64) buf_map >> 32;
2130                 txbd->tx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2131         }
2132         val = (u64) cp->l2_ring_map >> 32;
2133         cnic_ctx_wr(dev, cid_addr, offset2, val);
2134         txbd->tx_bd_haddr_hi = val;
2135
2136         val = (u64) cp->l2_ring_map & 0xffffffff;
2137         cnic_ctx_wr(dev, cid_addr, offset3, val);
2138         txbd->tx_bd_haddr_lo = val;
2139 }
2140
2141 static void cnic_init_bnx2_rx_ring(struct cnic_dev *dev)
2142 {
2143         struct cnic_local *cp = dev->cnic_priv;
2144         struct cnic_eth_dev *ethdev = cp->ethdev;
2145         u32 cid_addr, sb_id, val, coal_reg, coal_val;
2146         int i;
2147         struct rx_bd *rxbd;
2148         struct status_block *s_blk = cp->status_blk;
2149
2150         sb_id = cp->status_blk_num;
2151         cnic_init_context(dev, 2);
2152         cp->rx_cons_ptr = &s_blk->status_rx_quick_consumer_index2;
2153         coal_reg = BNX2_HC_COMMAND;
2154         coal_val = CNIC_RD(dev, coal_reg);
2155         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2156                 struct status_block_msix *sblk = cp->status_blk;
2157
2158                 cp->rx_cons_ptr = &sblk->status_rx_quick_consumer_index;
2159                 coal_reg = BNX2_HC_COALESCE_NOW;
2160                 coal_val = 1 << (11 + sb_id);
2161         }
2162         i = 0;
2163         while (!(*cp->rx_cons_ptr != 0) && i < 10) {
2164                 CNIC_WR(dev, coal_reg, coal_val);
2165                 udelay(10);
2166                 i++;
2167                 barrier();
2168         }
2169         cp->rx_cons = *cp->rx_cons_ptr;
2170
2171         cid_addr = GET_CID_ADDR(2);
2172         val = BNX2_L2CTX_CTX_TYPE_CTX_BD_CHN_TYPE_VALUE |
2173               BNX2_L2CTX_CTX_TYPE_SIZE_L2 | (0x02 << 8);
2174         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_CTX_TYPE, val);
2175
2176         if (sb_id == 0)
2177                 val = 2 << BNX2_L2CTX_STATUSB_NUM_SHIFT;
2178         else
2179                 val = BNX2_L2CTX_STATUSB_NUM(sb_id);
2180         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_HOST_BDIDX, val);
2181
2182         rxbd = (struct rx_bd *) (cp->l2_ring + BCM_PAGE_SIZE);
2183         for (i = 0; i < MAX_RX_DESC_CNT; i++, rxbd++) {
2184                 dma_addr_t buf_map;
2185                 int n = (i % cp->l2_rx_ring_size) + 1;
2186
2187                 buf_map = cp->l2_buf_map + (n * cp->l2_single_buf_size);
2188                 rxbd->rx_bd_len = cp->l2_single_buf_size;
2189                 rxbd->rx_bd_flags = RX_BD_FLAGS_START | RX_BD_FLAGS_END;
2190                 rxbd->rx_bd_haddr_hi = (u64) buf_map >> 32;
2191                 rxbd->rx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2192         }
2193         val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) >> 32;
2194         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_HI, val);
2195         rxbd->rx_bd_haddr_hi = val;
2196
2197         val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) & 0xffffffff;
2198         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_LO, val);
2199         rxbd->rx_bd_haddr_lo = val;
2200
2201         val = cnic_reg_rd_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD);
2202         cnic_reg_wr_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD, val | (1 << 2));
2203 }
2204
2205 static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *dev)
2206 {
2207         struct kwqe *wqes[1], l2kwqe;
2208
2209         memset(&l2kwqe, 0, sizeof(l2kwqe));
2210         wqes[0] = &l2kwqe;
2211         l2kwqe.kwqe_op_flag = (L2_LAYER_CODE << KWQE_FLAGS_LAYER_SHIFT) |
2212                               (L2_KWQE_OPCODE_VALUE_FLUSH <<
2213                                KWQE_OPCODE_SHIFT) | 2;
2214         dev->submit_kwqes(dev, wqes, 1);
2215 }
2216
2217 static void cnic_set_bnx2_mac(struct cnic_dev *dev)
2218 {
2219         struct cnic_local *cp = dev->cnic_priv;
2220         u32 val;
2221
2222         val = cp->func << 2;
2223
2224         cp->shmem_base = cnic_reg_rd_ind(dev, BNX2_SHM_HDR_ADDR_0 + val);
2225
2226         val = cnic_reg_rd_ind(dev, cp->shmem_base +
2227                               BNX2_PORT_HW_CFG_ISCSI_MAC_UPPER);
2228         dev->mac_addr[0] = (u8) (val >> 8);
2229         dev->mac_addr[1] = (u8) val;
2230
2231         CNIC_WR(dev, BNX2_EMAC_MAC_MATCH4, val);
2232
2233         val = cnic_reg_rd_ind(dev, cp->shmem_base +
2234                               BNX2_PORT_HW_CFG_ISCSI_MAC_LOWER);
2235         dev->mac_addr[2] = (u8) (val >> 24);
2236         dev->mac_addr[3] = (u8) (val >> 16);
2237         dev->mac_addr[4] = (u8) (val >> 8);
2238         dev->mac_addr[5] = (u8) val;
2239
2240         CNIC_WR(dev, BNX2_EMAC_MAC_MATCH5, val);
2241
2242         val = 4 | BNX2_RPM_SORT_USER2_BC_EN;
2243         if (CHIP_NUM(cp) != CHIP_NUM_5709)
2244                 val |= BNX2_RPM_SORT_USER2_PROM_VLAN;
2245
2246         CNIC_WR(dev, BNX2_RPM_SORT_USER2, 0x0);
2247         CNIC_WR(dev, BNX2_RPM_SORT_USER2, val);
2248         CNIC_WR(dev, BNX2_RPM_SORT_USER2, val | BNX2_RPM_SORT_USER2_ENA);
2249 }
2250
2251 static int cnic_start_bnx2_hw(struct cnic_dev *dev)
2252 {
2253         struct cnic_local *cp = dev->cnic_priv;
2254         struct cnic_eth_dev *ethdev = cp->ethdev;
2255         struct status_block *sblk = cp->status_blk;
2256         u32 val;
2257         int err;
2258
2259         cnic_set_bnx2_mac(dev);
2260
2261         val = CNIC_RD(dev, BNX2_MQ_CONFIG);
2262         val &= ~BNX2_MQ_CONFIG_KNL_BYP_BLK_SIZE;
2263         if (BCM_PAGE_BITS > 12)
2264                 val |= (12 - 8)  << 4;
2265         else
2266                 val |= (BCM_PAGE_BITS - 8)  << 4;
2267
2268         CNIC_WR(dev, BNX2_MQ_CONFIG, val);
2269
2270         CNIC_WR(dev, BNX2_HC_COMP_PROD_TRIP, (2 << 16) | 8);
2271         CNIC_WR(dev, BNX2_HC_COM_TICKS, (64 << 16) | 220);
2272         CNIC_WR(dev, BNX2_HC_CMD_TICKS, (64 << 16) | 220);
2273
2274         err = cnic_setup_5709_context(dev, 1);
2275         if (err)
2276                 return err;
2277
2278         cnic_init_context(dev, KWQ_CID);
2279         cnic_init_context(dev, KCQ_CID);
2280
2281         cp->kwq_cid_addr = GET_CID_ADDR(KWQ_CID);
2282         cp->kwq_io_addr = MB_GET_CID_ADDR(KWQ_CID) + L5_KRNLQ_HOST_QIDX;
2283
2284         cp->max_kwq_idx = MAX_KWQ_IDX;
2285         cp->kwq_prod_idx = 0;
2286         cp->kwq_con_idx = 0;
2287         cp->cnic_local_flags |= CNIC_LCL_FL_KWQ_INIT;
2288
2289         if (CHIP_NUM(cp) == CHIP_NUM_5706 || CHIP_NUM(cp) == CHIP_NUM_5708)
2290                 cp->kwq_con_idx_ptr = &sblk->status_rx_quick_consumer_index15;
2291         else
2292                 cp->kwq_con_idx_ptr = &sblk->status_cmd_consumer_index;
2293
2294         /* Initialize the kernel work queue context. */
2295         val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2296               (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2297         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_TYPE, val);
2298
2299         val = (BCM_PAGE_SIZE / sizeof(struct kwqe) - 1) << 16;
2300         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2301
2302         val = ((BCM_PAGE_SIZE / sizeof(struct kwqe)) << 16) | KWQ_PAGE_CNT;
2303         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2304
2305         val = (u32) ((u64) cp->kwq_info.pgtbl_map >> 32);
2306         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2307
2308         val = (u32) cp->kwq_info.pgtbl_map;
2309         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2310
2311         cp->kcq_cid_addr = GET_CID_ADDR(KCQ_CID);
2312         cp->kcq_io_addr = MB_GET_CID_ADDR(KCQ_CID) + L5_KRNLQ_HOST_QIDX;
2313
2314         cp->kcq_prod_idx = 0;
2315
2316         /* Initialize the kernel complete queue context. */
2317         val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2318               (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2319         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_TYPE, val);
2320
2321         val = (BCM_PAGE_SIZE / sizeof(struct kcqe) - 1) << 16;
2322         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2323
2324         val = ((BCM_PAGE_SIZE / sizeof(struct kcqe)) << 16) | KCQ_PAGE_CNT;
2325         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2326
2327         val = (u32) ((u64) cp->kcq_info.pgtbl_map >> 32);
2328         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2329
2330         val = (u32) cp->kcq_info.pgtbl_map;
2331         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2332
2333         cp->int_num = 0;
2334         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2335                 u32 sb_id = cp->status_blk_num;
2336                 u32 sb = BNX2_L2CTX_STATUSB_NUM(sb_id);
2337
2338                 cp->int_num = sb_id << BNX2_PCICFG_INT_ACK_CMD_INT_NUM_SHIFT;
2339                 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2340                 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2341         }
2342
2343         /* Enable Commnad Scheduler notification when we write to the
2344          * host producer index of the kernel contexts. */
2345         CNIC_WR(dev, BNX2_MQ_KNL_CMD_MASK1, 2);
2346
2347         /* Enable Command Scheduler notification when we write to either
2348          * the Send Queue or Receive Queue producer indexes of the kernel
2349          * bypass contexts. */
2350         CNIC_WR(dev, BNX2_MQ_KNL_BYP_CMD_MASK1, 7);
2351         CNIC_WR(dev, BNX2_MQ_KNL_BYP_WRITE_MASK1, 7);
2352
2353         /* Notify COM when the driver post an application buffer. */
2354         CNIC_WR(dev, BNX2_MQ_KNL_RX_V2P_MASK2, 0x2000);
2355
2356         /* Set the CP and COM doorbells.  These two processors polls the
2357          * doorbell for a non zero value before running.  This must be done
2358          * after setting up the kernel queue contexts. */
2359         cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 1);
2360         cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 1);
2361
2362         cnic_init_bnx2_tx_ring(dev);
2363         cnic_init_bnx2_rx_ring(dev);
2364
2365         err = cnic_init_bnx2_irq(dev);
2366         if (err) {
2367                 printk(KERN_ERR PFX "%s: cnic_init_irq failed\n",
2368                        dev->netdev->name);
2369                 cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2370                 cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2371                 return err;
2372         }
2373
2374         return 0;
2375 }
2376
2377 static int cnic_start_hw(struct cnic_dev *dev)
2378 {
2379         struct cnic_local *cp = dev->cnic_priv;
2380         struct cnic_eth_dev *ethdev = cp->ethdev;
2381         int err;
2382
2383         if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
2384                 return -EALREADY;
2385
2386         err = ethdev->drv_register_cnic(dev->netdev, cp->cnic_ops, dev);
2387         if (err) {
2388                 printk(KERN_ERR PFX "%s: register_cnic failed\n",
2389                        dev->netdev->name);
2390                 goto err2;
2391         }
2392
2393         dev->regview = ethdev->io_base;
2394         cp->chip_id = ethdev->chip_id;
2395         pci_dev_get(dev->pcidev);
2396         cp->func = PCI_FUNC(dev->pcidev->devfn);
2397         cp->status_blk = ethdev->irq_arr[0].status_blk;
2398         cp->status_blk_num = ethdev->irq_arr[0].status_blk_num;
2399
2400         err = cp->alloc_resc(dev);
2401         if (err) {
2402                 printk(KERN_ERR PFX "%s: allocate resource failure\n",
2403                        dev->netdev->name);
2404                 goto err1;
2405         }
2406
2407         err = cp->start_hw(dev);
2408         if (err)
2409                 goto err1;
2410
2411         err = cnic_cm_open(dev);
2412         if (err)
2413                 goto err1;
2414
2415         set_bit(CNIC_F_CNIC_UP, &dev->flags);
2416
2417         cp->enable_int(dev);
2418
2419         return 0;
2420
2421 err1:
2422         ethdev->drv_unregister_cnic(dev->netdev);
2423         cp->free_resc(dev);
2424         pci_dev_put(dev->pcidev);
2425 err2:
2426         return err;
2427 }
2428
2429 static void cnic_stop_bnx2_hw(struct cnic_dev *dev)
2430 {
2431         struct cnic_local *cp = dev->cnic_priv;
2432         struct cnic_eth_dev *ethdev = cp->ethdev;
2433
2434         cnic_disable_bnx2_int_sync(dev);
2435
2436         cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2437         cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2438
2439         cnic_init_context(dev, KWQ_CID);
2440         cnic_init_context(dev, KCQ_CID);
2441
2442         cnic_setup_5709_context(dev, 0);
2443         cnic_free_irq(dev);
2444
2445         ethdev->drv_unregister_cnic(dev->netdev);
2446
2447         cnic_free_resc(dev);
2448 }
2449
2450 static void cnic_stop_hw(struct cnic_dev *dev)
2451 {
2452         if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2453                 struct cnic_local *cp = dev->cnic_priv;
2454
2455                 clear_bit(CNIC_F_CNIC_UP, &dev->flags);
2456                 rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], NULL);
2457                 synchronize_rcu();
2458                 cnic_cm_shutdown(dev);
2459                 cp->stop_hw(dev);
2460                 pci_dev_put(dev->pcidev);
2461         }
2462 }
2463
2464 static void cnic_free_dev(struct cnic_dev *dev)
2465 {
2466         int i = 0;
2467
2468         while ((atomic_read(&dev->ref_count) != 0) && i < 10) {
2469                 msleep(100);
2470                 i++;
2471         }
2472         if (atomic_read(&dev->ref_count) != 0)
2473                 printk(KERN_ERR PFX "%s: Failed waiting for ref count to go"
2474                                     " to zero.\n", dev->netdev->name);
2475
2476         printk(KERN_INFO PFX "Removed CNIC device: %s\n", dev->netdev->name);
2477         dev_put(dev->netdev);
2478         kfree(dev);
2479 }
2480
2481 static struct cnic_dev *cnic_alloc_dev(struct net_device *dev,
2482                                        struct pci_dev *pdev)
2483 {
2484         struct cnic_dev *cdev;
2485         struct cnic_local *cp;
2486         int alloc_size;
2487
2488         alloc_size = sizeof(struct cnic_dev) + sizeof(struct cnic_local);
2489
2490         cdev = kzalloc(alloc_size , GFP_KERNEL);
2491         if (cdev == NULL) {
2492                 printk(KERN_ERR PFX "%s: allocate dev struct failure\n",
2493                        dev->name);
2494                 return NULL;
2495         }
2496
2497         cdev->netdev = dev;
2498         cdev->cnic_priv = (char *)cdev + sizeof(struct cnic_dev);
2499         cdev->register_device = cnic_register_device;
2500         cdev->unregister_device = cnic_unregister_device;
2501         cdev->iscsi_nl_msg_recv = cnic_iscsi_nl_msg_recv;
2502
2503         cp = cdev->cnic_priv;
2504         cp->dev = cdev;
2505         cp->uio_dev = -1;
2506         cp->l2_single_buf_size = 0x400;
2507         cp->l2_rx_ring_size = 3;
2508
2509         spin_lock_init(&cp->cnic_ulp_lock);
2510
2511         printk(KERN_INFO PFX "Added CNIC device: %s\n", dev->name);
2512
2513         return cdev;
2514 }
2515
2516 static struct cnic_dev *init_bnx2_cnic(struct net_device *dev)
2517 {
2518         struct pci_dev *pdev;
2519         struct cnic_dev *cdev;
2520         struct cnic_local *cp;
2521         struct cnic_eth_dev *ethdev = NULL;
2522         struct cnic_eth_dev *(*probe)(struct net_device *) = NULL;
2523
2524         probe = symbol_get(bnx2_cnic_probe);
2525         if (probe) {
2526                 ethdev = (*probe)(dev);
2527                 symbol_put_addr(probe);
2528         }
2529         if (!ethdev)
2530                 return NULL;
2531
2532         pdev = ethdev->pdev;
2533         if (!pdev)
2534                 return NULL;
2535
2536         dev_hold(dev);
2537         pci_dev_get(pdev);
2538         if (pdev->device == PCI_DEVICE_ID_NX2_5709 ||
2539             pdev->device == PCI_DEVICE_ID_NX2_5709S) {
2540                 u8 rev;
2541
2542                 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
2543                 if (rev < 0x10) {
2544                         pci_dev_put(pdev);
2545                         goto cnic_err;
2546                 }
2547         }
2548         pci_dev_put(pdev);
2549
2550         cdev = cnic_alloc_dev(dev, pdev);
2551         if (cdev == NULL)
2552                 goto cnic_err;
2553
2554         set_bit(CNIC_F_BNX2_CLASS, &cdev->flags);
2555         cdev->submit_kwqes = cnic_submit_bnx2_kwqes;
2556
2557         cp = cdev->cnic_priv;
2558         cp->ethdev = ethdev;
2559         cdev->pcidev = pdev;
2560
2561         cp->cnic_ops = &cnic_bnx2_ops;
2562         cp->start_hw = cnic_start_bnx2_hw;
2563         cp->stop_hw = cnic_stop_bnx2_hw;
2564         cp->setup_pgtbl = cnic_setup_page_tbl;
2565         cp->alloc_resc = cnic_alloc_bnx2_resc;
2566         cp->free_resc = cnic_free_resc;
2567         cp->start_cm = cnic_cm_init_bnx2_hw;
2568         cp->stop_cm = cnic_cm_stop_bnx2_hw;
2569         cp->enable_int = cnic_enable_bnx2_int;
2570         cp->disable_int_sync = cnic_disable_bnx2_int_sync;
2571         cp->close_conn = cnic_close_bnx2_conn;
2572         cp->next_idx = cnic_bnx2_next_idx;
2573         cp->hw_idx = cnic_bnx2_hw_idx;
2574         return cdev;
2575
2576 cnic_err:
2577         dev_put(dev);
2578         return NULL;
2579 }
2580
2581 static struct cnic_dev *is_cnic_dev(struct net_device *dev)
2582 {
2583         struct ethtool_drvinfo drvinfo;
2584         struct cnic_dev *cdev = NULL;
2585
2586         if (dev->ethtool_ops && dev->ethtool_ops->get_drvinfo) {
2587                 memset(&drvinfo, 0, sizeof(drvinfo));
2588                 dev->ethtool_ops->get_drvinfo(dev, &drvinfo);
2589
2590                 if (!strcmp(drvinfo.driver, "bnx2"))
2591                         cdev = init_bnx2_cnic(dev);
2592                 if (cdev) {
2593                         write_lock(&cnic_dev_lock);
2594                         list_add(&cdev->list, &cnic_dev_list);
2595                         write_unlock(&cnic_dev_lock);
2596                 }
2597         }
2598         return cdev;
2599 }
2600
2601 /**
2602  * netdev event handler
2603  */
2604 static int cnic_netdev_event(struct notifier_block *this, unsigned long event,
2605                                                          void *ptr)
2606 {
2607         struct net_device *netdev = ptr;
2608         struct cnic_dev *dev;
2609         int if_type;
2610         int new_dev = 0;
2611
2612         dev = cnic_from_netdev(netdev);
2613
2614         if (!dev && (event == NETDEV_REGISTER || event == NETDEV_UP)) {
2615                 /* Check for the hot-plug device */
2616                 dev = is_cnic_dev(netdev);
2617                 if (dev) {
2618                         new_dev = 1;
2619                         cnic_hold(dev);
2620                 }
2621         }
2622         if (dev) {
2623                 struct cnic_local *cp = dev->cnic_priv;
2624
2625                 if (new_dev)
2626                         cnic_ulp_init(dev);
2627                 else if (event == NETDEV_UNREGISTER)
2628                         cnic_ulp_exit(dev);
2629                 else if (event == NETDEV_UP) {
2630                         mutex_lock(&cnic_lock);
2631                         if (!cnic_start_hw(dev))
2632                                 cnic_ulp_start(dev);
2633                         mutex_unlock(&cnic_lock);
2634                 }
2635
2636                 rcu_read_lock();
2637                 for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
2638                         struct cnic_ulp_ops *ulp_ops;
2639                         void *ctx;
2640
2641                         ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
2642                         if (!ulp_ops || !ulp_ops->indicate_netevent)
2643                                 continue;
2644
2645                         ctx = cp->ulp_handle[if_type];
2646
2647                         ulp_ops->indicate_netevent(ctx, event);
2648                 }
2649                 rcu_read_unlock();
2650
2651                 if (event == NETDEV_GOING_DOWN) {
2652                         mutex_lock(&cnic_lock);
2653                         cnic_ulp_stop(dev);
2654                         cnic_stop_hw(dev);
2655                         mutex_unlock(&cnic_lock);
2656                 } else if (event == NETDEV_UNREGISTER) {
2657                         write_lock(&cnic_dev_lock);
2658                         list_del_init(&dev->list);
2659                         write_unlock(&cnic_dev_lock);
2660
2661                         cnic_put(dev);
2662                         cnic_free_dev(dev);
2663                         goto done;
2664                 }
2665                 cnic_put(dev);
2666         }
2667 done:
2668         return NOTIFY_DONE;
2669 }
2670
2671 static struct notifier_block cnic_netdev_notifier = {
2672         .notifier_call = cnic_netdev_event
2673 };
2674
2675 static void cnic_release(void)
2676 {
2677         struct cnic_dev *dev;
2678
2679         while (!list_empty(&cnic_dev_list)) {
2680                 dev = list_entry(cnic_dev_list.next, struct cnic_dev, list);
2681                 if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2682                         cnic_ulp_stop(dev);
2683                         cnic_stop_hw(dev);
2684                 }
2685
2686                 cnic_ulp_exit(dev);
2687                 list_del_init(&dev->list);
2688                 cnic_free_dev(dev);
2689         }
2690 }
2691
2692 static int __init cnic_init(void)
2693 {
2694         int rc = 0;
2695
2696         printk(KERN_INFO "%s", version);
2697
2698         rc = register_netdevice_notifier(&cnic_netdev_notifier);
2699         if (rc) {
2700                 cnic_release();
2701                 return rc;
2702         }
2703
2704         return 0;
2705 }
2706
2707 static void __exit cnic_exit(void)
2708 {
2709         unregister_netdevice_notifier(&cnic_netdev_notifier);
2710         cnic_release();
2711         return;
2712 }
2713
2714 module_init(cnic_init);
2715 module_exit(cnic_exit);