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 #include <linux/module.h>
  29
  30 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
  31 #define BCM_VLAN 1
  32 #endif
  33 #include <net/ip.h>
  34 #include <net/tcp.h>
  35 #include <net/route.h>
  36 #include <net/ipv6.h>
  37 #include <net/ip6_route.h>
  38 #include <scsi/iscsi_if.h>
  39
  40 #include "cnic_if.h"
  41 #include "bnx2.h"
  42 #include "cnic.h"
  43 #include "cnic_defs.h"
  44
  45 #define DRV_MODULE_NAME         "cnic"
  46 #define PFX DRV_MODULE_NAME     ": "
  47
  48 static char version[] __devinitdata =
  49         "Broadcom NetXtreme II CNIC Driver " DRV_MODULE_NAME " v" CNIC_MODULE_VERSION " (" CNIC_MODULE_RELDATE ")\n";
  50
  51 MODULE_AUTHOR("Michael Chan <mchan@broadcom.com> and John(Zongxi) "
  52               "Chen (zongxi@broadcom.com");
  53 MODULE_DESCRIPTION("Broadcom NetXtreme II CNIC Driver");
  54 MODULE_LICENSE("GPL");
  55 MODULE_VERSION(CNIC_MODULE_VERSION);
  56
  57 static LIST_HEAD(cnic_dev_list);
  58 static DEFINE_RWLOCK(cnic_dev_lock);
  59 static DEFINE_MUTEX(cnic_lock);
  60
  61 static struct cnic_ulp_ops *cnic_ulp_tbl[MAX_CNIC_ULP_TYPE];
  62
  63 static int cnic_service_bnx2(void *, void *);
  64 static int cnic_ctl(void *, struct cnic_ctl_info *);
  65
  66 static struct cnic_ops cnic_bnx2_ops = {
  67         .cnic_owner     = THIS_MODULE,
  68         .cnic_handler   = cnic_service_bnx2,
  69         .cnic_ctl       = cnic_ctl,
  70 };
  71
  72 static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *);
  73 static void cnic_init_bnx2_tx_ring(struct cnic_dev *);
  74 static void cnic_init_bnx2_rx_ring(struct cnic_dev *);
  75 static int cnic_cm_set_pg(struct cnic_sock *);
  76
  77 static int cnic_uio_open(struct uio_info *uinfo, struct inode *inode)
  78 {
  79         struct cnic_dev *dev = uinfo->priv;
  80         struct cnic_local *cp = dev->cnic_priv;
  81
  82         if (!capable(CAP_NET_ADMIN))
  83                 return -EPERM;
  84
  85         if (cp->uio_dev != -1)
  86                 return -EBUSY;
  87
  88         cp->uio_dev = iminor(inode);
  89
  90         cnic_shutdown_bnx2_rx_ring(dev);
  91
  92         cnic_init_bnx2_tx_ring(dev);
  93         cnic_init_bnx2_rx_ring(dev);
  94
  95         return 0;
  96 }
  97
  98 static int cnic_uio_close(struct uio_info *uinfo, struct inode *inode)
  99 {
 100         struct cnic_dev *dev = uinfo->priv;
 101         struct cnic_local *cp = dev->cnic_priv;
 102
 103         cp->uio_dev = -1;
 104         return 0;
 105 }
 106
 107 static inline void cnic_hold(struct cnic_dev *dev)
 108 {
 109         atomic_inc(&dev->ref_count);
 110 }
 111
 112 static inline void cnic_put(struct cnic_dev *dev)
 113 {
 114         atomic_dec(&dev->ref_count);
 115 }
 116
 117 static inline void csk_hold(struct cnic_sock *csk)
 118 {
 119         atomic_inc(&csk->ref_count);
 120 }
 121
 122 static inline void csk_put(struct cnic_sock *csk)
 123 {
 124         atomic_dec(&csk->ref_count);
 125 }
 126
 127 static struct cnic_dev *cnic_from_netdev(struct net_device *netdev)
 128 {
 129         struct cnic_dev *cdev;
 130
 131         read_lock(&cnic_dev_lock);
 132         list_for_each_entry(cdev, &cnic_dev_list, list) {
 133                 if (netdev == cdev->netdev) {
 134                         cnic_hold(cdev);
 135                         read_unlock(&cnic_dev_lock);
 136                         return cdev;
 137                 }
 138         }
 139         read_unlock(&cnic_dev_lock);
 140         return NULL;
 141 }
 142
 143 static void cnic_ctx_wr(struct cnic_dev *dev, u32 cid_addr, u32 off, u32 val)
 144 {
 145         struct cnic_local *cp = dev->cnic_priv;
 146         struct cnic_eth_dev *ethdev = cp->ethdev;
 147         struct drv_ctl_info info;
 148         struct drv_ctl_io *io = &info.data.io;
 149
 150         info.cmd = DRV_CTL_CTX_WR_CMD;
 151         io->cid_addr = cid_addr;
 152         io->offset = off;
 153         io->data = val;
 154         ethdev->drv_ctl(dev->netdev, &info);
 155 }
 156
 157 static void cnic_reg_wr_ind(struct cnic_dev *dev, u32 off, u32 val)
 158 {
 159         struct cnic_local *cp = dev->cnic_priv;
 160         struct cnic_eth_dev *ethdev = cp->ethdev;
 161         struct drv_ctl_info info;
 162         struct drv_ctl_io *io = &info.data.io;
 163
 164         info.cmd = DRV_CTL_IO_WR_CMD;
 165         io->offset = off;
 166         io->data = val;
 167         ethdev->drv_ctl(dev->netdev, &info);
 168 }
 169
 170 static u32 cnic_reg_rd_ind(struct cnic_dev *dev, u32 off)
 171 {
 172         struct cnic_local *cp = dev->cnic_priv;
 173         struct cnic_eth_dev *ethdev = cp->ethdev;
 174         struct drv_ctl_info info;
 175         struct drv_ctl_io *io = &info.data.io;
 176
 177         info.cmd = DRV_CTL_IO_RD_CMD;
 178         io->offset = off;
 179         ethdev->drv_ctl(dev->netdev, &info);
 180         return io->data;
 181 }
 182
 183 static int cnic_in_use(struct cnic_sock *csk)
 184 {
 185         return test_bit(SK_F_INUSE, &csk->flags);
 186 }
 187
 188 static void cnic_kwq_completion(struct cnic_dev *dev, u32 count)
 189 {
 190         struct cnic_local *cp = dev->cnic_priv;
 191         struct cnic_eth_dev *ethdev = cp->ethdev;
 192         struct drv_ctl_info info;
 193
 194         info.cmd = DRV_CTL_COMPLETION_CMD;
 195         info.data.comp.comp_count = count;
 196         ethdev->drv_ctl(dev->netdev, &info);
 197 }
 198
 199 static int cnic_send_nlmsg(struct cnic_local *cp, u32 type,
 200                            struct cnic_sock *csk)
 201 {
 202         struct iscsi_path path_req;
 203         char *buf = NULL;
 204         u16 len = 0;
 205         u32 msg_type = ISCSI_KEVENT_IF_DOWN;
 206         struct cnic_ulp_ops *ulp_ops;
 207
 208         if (cp->uio_dev == -1)
 209                 return -ENODEV;
 210
 211         if (csk) {
 212                 len = sizeof(path_req);
 213                 buf = (char *) &path_req;
 214                 memset(&path_req, 0, len);
 215
 216                 msg_type = ISCSI_KEVENT_PATH_REQ;
 217                 path_req.handle = (u64) csk->l5_cid;
 218                 if (test_bit(SK_F_IPV6, &csk->flags)) {
 219                         memcpy(&path_req.dst.v6_addr, &csk->dst_ip[0],
 220                                sizeof(struct in6_addr));
 221                         path_req.ip_addr_len = 16;
 222                 } else {
 223                         memcpy(&path_req.dst.v4_addr, &csk->dst_ip[0],
 224                                sizeof(struct in_addr));
 225                         path_req.ip_addr_len = 4;
 226                 }
 227                 path_req.vlan_id = csk->vlan_id;
 228                 path_req.pmtu = csk->mtu;
 229         }
 230
 231         rcu_read_lock();
 232         ulp_ops = rcu_dereference(cp->ulp_ops[CNIC_ULP_ISCSI]);
 233         if (ulp_ops)
 234                 ulp_ops->iscsi_nl_send_msg(cp->dev, msg_type, buf, len);
 235         rcu_read_unlock();
 236         return 0;
 237 }
 238
 239 static int cnic_iscsi_nl_msg_recv(struct cnic_dev *dev, u32 msg_type,
 240                                   char *buf, u16 len)
 241 {
 242         int rc = -EINVAL;
 243
 244         switch (msg_type) {
 245         case ISCSI_UEVENT_PATH_UPDATE: {
 246                 struct cnic_local *cp;
 247                 u32 l5_cid;
 248                 struct cnic_sock *csk;
 249                 struct iscsi_path *path_resp;
 250
 251                 if (len < sizeof(*path_resp))
 252                         break;
 253
 254                 path_resp = (struct iscsi_path *) buf;
 255                 cp = dev->cnic_priv;
 256                 l5_cid = (u32) path_resp->handle;
 257                 if (l5_cid >= MAX_CM_SK_TBL_SZ)
 258                         break;
 259
 260                 csk = &cp->csk_tbl[l5_cid];
 261                 csk_hold(csk);
 262                 if (cnic_in_use(csk)) {
 263                         memcpy(csk->ha, path_resp->mac_addr, 6);
 264                         if (test_bit(SK_F_IPV6, &csk->flags))
 265                                 memcpy(&csk->src_ip[0], &path_resp->src.v6_addr,
 266                                        sizeof(struct in6_addr));
 267                         else
 268                                 memcpy(&csk->src_ip[0], &path_resp->src.v4_addr,
 269                                        sizeof(struct in_addr));
 270                         if (is_valid_ether_addr(csk->ha))
 271                                 cnic_cm_set_pg(csk);
 272                 }
 273                 csk_put(csk);
 274                 rc = 0;
 275         }
 276         }
 277
 278         return rc;
 279 }
 280
 281 static int cnic_offld_prep(struct cnic_sock *csk)
 282 {
 283         if (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
 284                 return 0;
 285
 286         if (!test_bit(SK_F_CONNECT_START, &csk->flags)) {
 287                 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
 288                 return 0;
 289         }
 290
 291         return 1;
 292 }
 293
 294 static int cnic_close_prep(struct cnic_sock *csk)
 295 {
 296         clear_bit(SK_F_CONNECT_START, &csk->flags);
 297         smp_mb__after_clear_bit();
 298
 299         if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags)) {
 300                 while (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
 301                         msleep(1);
 302
 303                 return 1;
 304         }
 305         return 0;
 306 }
 307
 308 static int cnic_abort_prep(struct cnic_sock *csk)
 309 {
 310         clear_bit(SK_F_CONNECT_START, &csk->flags);
 311         smp_mb__after_clear_bit();
 312
 313         while (test_and_set_bit(SK_F_OFFLD_SCHED, &csk->flags))
 314                 msleep(1);
 315
 316         if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags)) {
 317                 csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
 318                 return 1;
 319         }
 320
 321         return 0;
 322 }
 323
 324 int cnic_register_driver(int ulp_type, struct cnic_ulp_ops *ulp_ops)
 325 {
 326         struct cnic_dev *dev;
 327
 328         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 329                 printk(KERN_ERR PFX "cnic_register_driver: Bad type %d\n",
 330                        ulp_type);
 331                 return -EINVAL;
 332         }
 333         mutex_lock(&cnic_lock);
 334         if (cnic_ulp_tbl[ulp_type]) {
 335                 printk(KERN_ERR PFX "cnic_register_driver: Type %d has already "
 336                                     "been registered\n", ulp_type);
 337                 mutex_unlock(&cnic_lock);
 338                 return -EBUSY;
 339         }
 340
 341         read_lock(&cnic_dev_lock);
 342         list_for_each_entry(dev, &cnic_dev_list, list) {
 343                 struct cnic_local *cp = dev->cnic_priv;
 344
 345                 clear_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]);
 346         }
 347         read_unlock(&cnic_dev_lock);
 348
 349         rcu_assign_pointer(cnic_ulp_tbl[ulp_type], ulp_ops);
 350         mutex_unlock(&cnic_lock);
 351
 352         /* Prevent race conditions with netdev_event */
 353         rtnl_lock();
 354         read_lock(&cnic_dev_lock);
 355         list_for_each_entry(dev, &cnic_dev_list, list) {
 356                 struct cnic_local *cp = dev->cnic_priv;
 357
 358                 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[ulp_type]))
 359                         ulp_ops->cnic_init(dev);
 360         }
 361         read_unlock(&cnic_dev_lock);
 362         rtnl_unlock();
 363
 364         return 0;
 365 }
 366
 367 int cnic_unregister_driver(int ulp_type)
 368 {
 369         struct cnic_dev *dev;
 370
 371         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 372                 printk(KERN_ERR PFX "cnic_unregister_driver: Bad type %d\n",
 373                        ulp_type);
 374                 return -EINVAL;
 375         }
 376         mutex_lock(&cnic_lock);
 377         if (!cnic_ulp_tbl[ulp_type]) {
 378                 printk(KERN_ERR PFX "cnic_unregister_driver: Type %d has not "
 379                                     "been registered\n", ulp_type);
 380                 goto out_unlock;
 381         }
 382         read_lock(&cnic_dev_lock);
 383         list_for_each_entry(dev, &cnic_dev_list, list) {
 384                 struct cnic_local *cp = dev->cnic_priv;
 385
 386                 if (rcu_dereference(cp->ulp_ops[ulp_type])) {
 387                         printk(KERN_ERR PFX "cnic_unregister_driver: Type %d "
 388                                "still has devices registered\n", ulp_type);
 389                         read_unlock(&cnic_dev_lock);
 390                         goto out_unlock;
 391                 }
 392         }
 393         read_unlock(&cnic_dev_lock);
 394
 395         rcu_assign_pointer(cnic_ulp_tbl[ulp_type], NULL);
 396
 397         mutex_unlock(&cnic_lock);
 398         synchronize_rcu();
 399         return 0;
 400
 401 out_unlock:
 402         mutex_unlock(&cnic_lock);
 403         return -EINVAL;
 404 }
 405
 406 static int cnic_start_hw(struct cnic_dev *);
 407 static void cnic_stop_hw(struct cnic_dev *);
 408
 409 static int cnic_register_device(struct cnic_dev *dev, int ulp_type,
 410                                 void *ulp_ctx)
 411 {
 412         struct cnic_local *cp = dev->cnic_priv;
 413         struct cnic_ulp_ops *ulp_ops;
 414
 415         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 416                 printk(KERN_ERR PFX "cnic_register_device: Bad type %d\n",
 417                        ulp_type);
 418                 return -EINVAL;
 419         }
 420         mutex_lock(&cnic_lock);
 421         if (cnic_ulp_tbl[ulp_type] == NULL) {
 422                 printk(KERN_ERR PFX "cnic_register_device: Driver with type %d "
 423                                     "has not been registered\n", ulp_type);
 424                 mutex_unlock(&cnic_lock);
 425                 return -EAGAIN;
 426         }
 427         if (rcu_dereference(cp->ulp_ops[ulp_type])) {
 428                 printk(KERN_ERR PFX "cnic_register_device: Type %d has already "
 429                        "been registered to this device\n", ulp_type);
 430                 mutex_unlock(&cnic_lock);
 431                 return -EBUSY;
 432         }
 433
 434         clear_bit(ULP_F_START, &cp->ulp_flags[ulp_type]);
 435         cp->ulp_handle[ulp_type] = ulp_ctx;
 436         ulp_ops = cnic_ulp_tbl[ulp_type];
 437         rcu_assign_pointer(cp->ulp_ops[ulp_type], ulp_ops);
 438         cnic_hold(dev);
 439
 440         if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
 441                 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[ulp_type]))
 442                         ulp_ops->cnic_start(cp->ulp_handle[ulp_type]);
 443
 444         mutex_unlock(&cnic_lock);
 445
 446         return 0;
 447
 448 }
 449 EXPORT_SYMBOL(cnic_register_driver);
 450
 451 static int cnic_unregister_device(struct cnic_dev *dev, int ulp_type)
 452 {
 453         struct cnic_local *cp = dev->cnic_priv;
 454
 455         if (ulp_type >= MAX_CNIC_ULP_TYPE) {
 456                 printk(KERN_ERR PFX "cnic_unregister_device: Bad type %d\n",
 457                        ulp_type);
 458                 return -EINVAL;
 459         }
 460         mutex_lock(&cnic_lock);
 461         if (rcu_dereference(cp->ulp_ops[ulp_type])) {
 462                 rcu_assign_pointer(cp->ulp_ops[ulp_type], NULL);
 463                 cnic_put(dev);
 464         } else {
 465                 printk(KERN_ERR PFX "cnic_unregister_device: device not "
 466                        "registered to this ulp type %d\n", ulp_type);
 467                 mutex_unlock(&cnic_lock);
 468                 return -EINVAL;
 469         }
 470         mutex_unlock(&cnic_lock);
 471
 472         synchronize_rcu();
 473
 474         return 0;
 475 }
 476 EXPORT_SYMBOL(cnic_unregister_driver);
 477
 478 static int cnic_init_id_tbl(struct cnic_id_tbl *id_tbl, u32 size, u32 start_id)
 479 {
 480         id_tbl->start = start_id;
 481         id_tbl->max = size;
 482         id_tbl->next = 0;
 483         spin_lock_init(&id_tbl->lock);
 484         id_tbl->table = kzalloc(DIV_ROUND_UP(size, 32) * 4, GFP_KERNEL);
 485         if (!id_tbl->table)
 486                 return -ENOMEM;
 487
 488         return 0;
 489 }
 490
 491 static void cnic_free_id_tbl(struct cnic_id_tbl *id_tbl)
 492 {
 493         kfree(id_tbl->table);
 494         id_tbl->table = NULL;
 495 }
 496
 497 static int cnic_alloc_id(struct cnic_id_tbl *id_tbl, u32 id)
 498 {
 499         int ret = -1;
 500
 501         id -= id_tbl->start;
 502         if (id >= id_tbl->max)
 503                 return ret;
 504
 505         spin_lock(&id_tbl->lock);
 506         if (!test_bit(id, id_tbl->table)) {
 507                 set_bit(id, id_tbl->table);
 508                 ret = 0;
 509         }
 510         spin_unlock(&id_tbl->lock);
 511         return ret;
 512 }
 513
 514 /* Returns -1 if not successful */
 515 static u32 cnic_alloc_new_id(struct cnic_id_tbl *id_tbl)
 516 {
 517         u32 id;
 518
 519         spin_lock(&id_tbl->lock);
 520         id = find_next_zero_bit(id_tbl->table, id_tbl->max, id_tbl->next);
 521         if (id >= id_tbl->max) {
 522                 id = -1;
 523                 if (id_tbl->next != 0) {
 524                         id = find_first_zero_bit(id_tbl->table, id_tbl->next);
 525                         if (id >= id_tbl->next)
 526                                 id = -1;
 527                 }
 528         }
 529
 530         if (id < id_tbl->max) {
 531                 set_bit(id, id_tbl->table);
 532                 id_tbl->next = (id + 1) & (id_tbl->max - 1);
 533                 id += id_tbl->start;
 534         }
 535
 536         spin_unlock(&id_tbl->lock);
 537
 538         return id;
 539 }
 540
 541 static void cnic_free_id(struct cnic_id_tbl *id_tbl, u32 id)
 542 {
 543         if (id == -1)
 544                 return;
 545
 546         id -= id_tbl->start;
 547         if (id >= id_tbl->max)
 548                 return;
 549
 550         clear_bit(id, id_tbl->table);
 551 }
 552
 553 static void cnic_free_dma(struct cnic_dev *dev, struct cnic_dma *dma)
 554 {
 555         int i;
 556
 557         if (!dma->pg_arr)
 558                 return;
 559
 560         for (i = 0; i < dma->num_pages; i++) {
 561                 if (dma->pg_arr[i]) {
 562                         pci_free_consistent(dev->pcidev, BCM_PAGE_SIZE,
 563                                             dma->pg_arr[i], dma->pg_map_arr[i]);
 564                         dma->pg_arr[i] = NULL;
 565                 }
 566         }
 567         if (dma->pgtbl) {
 568                 pci_free_consistent(dev->pcidev, dma->pgtbl_size,
 569                                     dma->pgtbl, dma->pgtbl_map);
 570                 dma->pgtbl = NULL;
 571         }
 572         kfree(dma->pg_arr);
 573         dma->pg_arr = NULL;
 574         dma->num_pages = 0;
 575 }
 576
 577 static void cnic_setup_page_tbl(struct cnic_dev *dev, struct cnic_dma *dma)
 578 {
 579         int i;
 580         u32 *page_table = dma->pgtbl;
 581
 582         for (i = 0; i < dma->num_pages; i++) {
 583                 /* Each entry needs to be in big endian format. */
 584                 *page_table = (u32) ((u64) dma->pg_map_arr[i] >> 32);
 585                 page_table++;
 586                 *page_table = (u32) dma->pg_map_arr[i];
 587                 page_table++;
 588         }
 589 }
 590
 591 static int cnic_alloc_dma(struct cnic_dev *dev, struct cnic_dma *dma,
 592                           int pages, int use_pg_tbl)
 593 {
 594         int i, size;
 595         struct cnic_local *cp = dev->cnic_priv;
 596
 597         size = pages * (sizeof(void *) + sizeof(dma_addr_t));
 598         dma->pg_arr = kzalloc(size, GFP_ATOMIC);
 599         if (dma->pg_arr == NULL)
 600                 return -ENOMEM;
 601
 602         dma->pg_map_arr = (dma_addr_t *) (dma->pg_arr + pages);
 603         dma->num_pages = pages;
 604
 605         for (i = 0; i < pages; i++) {
 606                 dma->pg_arr[i] = pci_alloc_consistent(dev->pcidev,
 607                                                       BCM_PAGE_SIZE,
 608                                                       &dma->pg_map_arr[i]);
 609                 if (dma->pg_arr[i] == NULL)
 610                         goto error;
 611         }
 612         if (!use_pg_tbl)
 613                 return 0;
 614
 615         dma->pgtbl_size = ((pages * 8) + BCM_PAGE_SIZE - 1) &
 616                           ~(BCM_PAGE_SIZE - 1);
 617         dma->pgtbl = pci_alloc_consistent(dev->pcidev, dma->pgtbl_size,
 618                                           &dma->pgtbl_map);
 619         if (dma->pgtbl == NULL)
 620                 goto error;
 621
 622         cp->setup_pgtbl(dev, dma);
 623
 624         return 0;
 625
 626 error:
 627         cnic_free_dma(dev, dma);
 628         return -ENOMEM;
 629 }
 630
 631 static void cnic_free_resc(struct cnic_dev *dev)
 632 {
 633         struct cnic_local *cp = dev->cnic_priv;
 634         int i = 0;
 635
 636         if (cp->cnic_uinfo) {
 637                 cnic_send_nlmsg(cp, ISCSI_KEVENT_IF_DOWN, NULL);
 638                 while (cp->uio_dev != -1 && i < 15) {
 639                         msleep(100);
 640                         i++;
 641                 }
 642                 uio_unregister_device(cp->cnic_uinfo);
 643                 kfree(cp->cnic_uinfo);
 644                 cp->cnic_uinfo = NULL;
 645         }
 646
 647         if (cp->l2_buf) {
 648                 pci_free_consistent(dev->pcidev, cp->l2_buf_size,
 649                                     cp->l2_buf, cp->l2_buf_map);
 650                 cp->l2_buf = NULL;
 651         }
 652
 653         if (cp->l2_ring) {
 654                 pci_free_consistent(dev->pcidev, cp->l2_ring_size,
 655                                     cp->l2_ring, cp->l2_ring_map);
 656                 cp->l2_ring = NULL;
 657         }
 658
 659         for (i = 0; i < cp->ctx_blks; i++) {
 660                 if (cp->ctx_arr[i].ctx) {
 661                         pci_free_consistent(dev->pcidev, cp->ctx_blk_size,
 662                                             cp->ctx_arr[i].ctx,
 663                                             cp->ctx_arr[i].mapping);
 664                         cp->ctx_arr[i].ctx = NULL;
 665                 }
 666         }
 667         kfree(cp->ctx_arr);
 668         cp->ctx_arr = NULL;
 669         cp->ctx_blks = 0;
 670
 671         cnic_free_dma(dev, &cp->gbl_buf_info);
 672         cnic_free_dma(dev, &cp->conn_buf_info);
 673         cnic_free_dma(dev, &cp->kwq_info);
 674         cnic_free_dma(dev, &cp->kcq_info);
 675         kfree(cp->iscsi_tbl);
 676         cp->iscsi_tbl = NULL;
 677         kfree(cp->ctx_tbl);
 678         cp->ctx_tbl = NULL;
 679
 680         cnic_free_id_tbl(&cp->cid_tbl);
 681 }
 682
 683 static int cnic_alloc_context(struct cnic_dev *dev)
 684 {
 685         struct cnic_local *cp = dev->cnic_priv;
 686
 687         if (CHIP_NUM(cp) == CHIP_NUM_5709) {
 688                 int i, k, arr_size;
 689
 690                 cp->ctx_blk_size = BCM_PAGE_SIZE;
 691                 cp->cids_per_blk = BCM_PAGE_SIZE / 128;
 692                 arr_size = BNX2_MAX_CID / cp->cids_per_blk *
 693                            sizeof(struct cnic_ctx);
 694                 cp->ctx_arr = kzalloc(arr_size, GFP_KERNEL);
 695                 if (cp->ctx_arr == NULL)
 696                         return -ENOMEM;
 697
 698                 k = 0;
 699                 for (i = 0; i < 2; i++) {
 700                         u32 j, reg, off, lo, hi;
 701
 702                         if (i == 0)
 703                                 off = BNX2_PG_CTX_MAP;
 704                         else
 705                                 off = BNX2_ISCSI_CTX_MAP;
 706
 707                         reg = cnic_reg_rd_ind(dev, off);
 708                         lo = reg >> 16;
 709                         hi = reg & 0xffff;
 710                         for (j = lo; j < hi; j += cp->cids_per_blk, k++)
 711                                 cp->ctx_arr[k].cid = j;
 712                 }
 713
 714                 cp->ctx_blks = k;
 715                 if (cp->ctx_blks >= (BNX2_MAX_CID / cp->cids_per_blk)) {
 716                         cp->ctx_blks = 0;
 717                         return -ENOMEM;
 718                 }
 719
 720                 for (i = 0; i < cp->ctx_blks; i++) {
 721                         cp->ctx_arr[i].ctx =
 722                                 pci_alloc_consistent(dev->pcidev, BCM_PAGE_SIZE,
 723                                                      &cp->ctx_arr[i].mapping);
 724                         if (cp->ctx_arr[i].ctx == NULL)
 725                                 return -ENOMEM;
 726                 }
 727         }
 728         return 0;
 729 }
 730
 731 static int cnic_alloc_bnx2_resc(struct cnic_dev *dev)
 732 {
 733         struct cnic_local *cp = dev->cnic_priv;
 734         struct uio_info *uinfo;
 735         int ret;
 736
 737         ret = cnic_alloc_dma(dev, &cp->kwq_info, KWQ_PAGE_CNT, 1);
 738         if (ret)
 739                 goto error;
 740         cp->kwq = (struct kwqe **) cp->kwq_info.pg_arr;
 741
 742         ret = cnic_alloc_dma(dev, &cp->kcq_info, KCQ_PAGE_CNT, 1);
 743         if (ret)
 744                 goto error;
 745         cp->kcq = (struct kcqe **) cp->kcq_info.pg_arr;
 746
 747         ret = cnic_alloc_context(dev);
 748         if (ret)
 749                 goto error;
 750
 751         cp->l2_ring_size = 2 * BCM_PAGE_SIZE;
 752         cp->l2_ring = pci_alloc_consistent(dev->pcidev, cp->l2_ring_size,
 753                                            &cp->l2_ring_map);
 754         if (!cp->l2_ring)
 755                 goto error;
 756
 757         cp->l2_buf_size = (cp->l2_rx_ring_size + 1) * cp->l2_single_buf_size;
 758         cp->l2_buf_size = PAGE_ALIGN(cp->l2_buf_size);
 759         cp->l2_buf = pci_alloc_consistent(dev->pcidev, cp->l2_buf_size,
 760                                            &cp->l2_buf_map);
 761         if (!cp->l2_buf)
 762                 goto error;
 763
 764         uinfo = kzalloc(sizeof(*uinfo), GFP_ATOMIC);
 765         if (!uinfo)
 766                 goto error;
 767
 768         uinfo->mem[0].addr = dev->netdev->base_addr;
 769         uinfo->mem[0].internal_addr = dev->regview;
 770         uinfo->mem[0].size = dev->netdev->mem_end - dev->netdev->mem_start;
 771         uinfo->mem[0].memtype = UIO_MEM_PHYS;
 772
 773         uinfo->mem[1].addr = (unsigned long) cp->status_blk & PAGE_MASK;
 774         if (cp->ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX)
 775                 uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE * 9;
 776         else
 777                 uinfo->mem[1].size = BNX2_SBLK_MSIX_ALIGN_SIZE;
 778         uinfo->mem[1].memtype = UIO_MEM_LOGICAL;
 779
 780         uinfo->mem[2].addr = (unsigned long) cp->l2_ring;
 781         uinfo->mem[2].size = cp->l2_ring_size;
 782         uinfo->mem[2].memtype = UIO_MEM_LOGICAL;
 783
 784         uinfo->mem[3].addr = (unsigned long) cp->l2_buf;
 785         uinfo->mem[3].size = cp->l2_buf_size;
 786         uinfo->mem[3].memtype = UIO_MEM_LOGICAL;
 787
 788         uinfo->name = "bnx2_cnic";
 789         uinfo->version = CNIC_MODULE_VERSION;
 790         uinfo->irq = UIO_IRQ_CUSTOM;
 791
 792         uinfo->open = cnic_uio_open;
 793         uinfo->release = cnic_uio_close;
 794
 795         uinfo->priv = dev;
 796
 797         ret = uio_register_device(&dev->pcidev->dev, uinfo);
 798         if (ret) {
 799                 kfree(uinfo);
 800                 goto error;
 801         }
 802
 803         cp->cnic_uinfo = uinfo;
 804
 805         return 0;
 806
 807 error:
 808         cnic_free_resc(dev);
 809         return ret;
 810 }
 811
 812 static inline u32 cnic_kwq_avail(struct cnic_local *cp)
 813 {
 814         return cp->max_kwq_idx -
 815                 ((cp->kwq_prod_idx - cp->kwq_con_idx) & cp->max_kwq_idx);
 816 }
 817
 818 static int cnic_submit_bnx2_kwqes(struct cnic_dev *dev, struct kwqe *wqes[],
 819                                   u32 num_wqes)
 820 {
 821         struct cnic_local *cp = dev->cnic_priv;
 822         struct kwqe *prod_qe;
 823         u16 prod, sw_prod, i;
 824
 825         if (!test_bit(CNIC_F_CNIC_UP, &dev->flags))
 826                 return -EAGAIN;         /* bnx2 is down */
 827
 828         spin_lock_bh(&cp->cnic_ulp_lock);
 829         if (num_wqes > cnic_kwq_avail(cp) &&
 830             !(cp->cnic_local_flags & CNIC_LCL_FL_KWQ_INIT)) {
 831                 spin_unlock_bh(&cp->cnic_ulp_lock);
 832                 return -EAGAIN;
 833         }
 834
 835         cp->cnic_local_flags &= ~CNIC_LCL_FL_KWQ_INIT;
 836
 837         prod = cp->kwq_prod_idx;
 838         sw_prod = prod & MAX_KWQ_IDX;
 839         for (i = 0; i < num_wqes; i++) {
 840                 prod_qe = &cp->kwq[KWQ_PG(sw_prod)][KWQ_IDX(sw_prod)];
 841                 memcpy(prod_qe, wqes[i], sizeof(struct kwqe));
 842                 prod++;
 843                 sw_prod = prod & MAX_KWQ_IDX;
 844         }
 845         cp->kwq_prod_idx = prod;
 846
 847         CNIC_WR16(dev, cp->kwq_io_addr, cp->kwq_prod_idx);
 848
 849         spin_unlock_bh(&cp->cnic_ulp_lock);
 850         return 0;
 851 }
 852
 853 static void service_kcqes(struct cnic_dev *dev, int num_cqes)
 854 {
 855         struct cnic_local *cp = dev->cnic_priv;
 856         int i, j;
 857
 858         i = 0;
 859         j = 1;
 860         while (num_cqes) {
 861                 struct cnic_ulp_ops *ulp_ops;
 862                 int ulp_type;
 863                 u32 kcqe_op_flag = cp->completed_kcq[i]->kcqe_op_flag;
 864                 u32 kcqe_layer = kcqe_op_flag & KCQE_FLAGS_LAYER_MASK;
 865
 866                 if (unlikely(kcqe_op_flag & KCQE_RAMROD_COMPLETION))
 867                         cnic_kwq_completion(dev, 1);
 868
 869                 while (j < num_cqes) {
 870                         u32 next_op = cp->completed_kcq[i + j]->kcqe_op_flag;
 871
 872                         if ((next_op & KCQE_FLAGS_LAYER_MASK) != kcqe_layer)
 873                                 break;
 874
 875                         if (unlikely(next_op & KCQE_RAMROD_COMPLETION))
 876                                 cnic_kwq_completion(dev, 1);
 877                         j++;
 878                 }
 879
 880                 if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_RDMA)
 881                         ulp_type = CNIC_ULP_RDMA;
 882                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L5_ISCSI)
 883                         ulp_type = CNIC_ULP_ISCSI;
 884                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L4)
 885                         ulp_type = CNIC_ULP_L4;
 886                 else if (kcqe_layer == KCQE_FLAGS_LAYER_MASK_L2)
 887                         goto end;
 888                 else {
 889                         printk(KERN_ERR PFX "%s: Unknown type of KCQE(0x%x)\n",
 890                                dev->netdev->name, kcqe_op_flag);
 891                         goto end;
 892                 }
 893
 894                 rcu_read_lock();
 895                 ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
 896                 if (likely(ulp_ops)) {
 897                         ulp_ops->indicate_kcqes(cp->ulp_handle[ulp_type],
 898                                                   cp->completed_kcq + i, j);
 899                 }
 900                 rcu_read_unlock();
 901 end:
 902                 num_cqes -= j;
 903                 i += j;
 904                 j = 1;
 905         }
 906         return;
 907 }
 908
 909 static u16 cnic_bnx2_next_idx(u16 idx)
 910 {
 911         return idx + 1;
 912 }
 913
 914 static u16 cnic_bnx2_hw_idx(u16 idx)
 915 {
 916         return idx;
 917 }
 918
 919 static int cnic_get_kcqes(struct cnic_dev *dev, u16 hw_prod, u16 *sw_prod)
 920 {
 921         struct cnic_local *cp = dev->cnic_priv;
 922         u16 i, ri, last;
 923         struct kcqe *kcqe;
 924         int kcqe_cnt = 0, last_cnt = 0;
 925
 926         i = ri = last = *sw_prod;
 927         ri &= MAX_KCQ_IDX;
 928
 929         while ((i != hw_prod) && (kcqe_cnt < MAX_COMPLETED_KCQE)) {
 930                 kcqe = &cp->kcq[KCQ_PG(ri)][KCQ_IDX(ri)];
 931                 cp->completed_kcq[kcqe_cnt++] = kcqe;
 932                 i = cp->next_idx(i);
 933                 ri = i & MAX_KCQ_IDX;
 934                 if (likely(!(kcqe->kcqe_op_flag & KCQE_FLAGS_NEXT))) {
 935                         last_cnt = kcqe_cnt;
 936                         last = i;
 937                 }
 938         }
 939
 940         *sw_prod = last;
 941         return last_cnt;
 942 }
 943
 944 static void cnic_chk_bnx2_pkt_rings(struct cnic_local *cp)
 945 {
 946         u16 rx_cons = *cp->rx_cons_ptr;
 947         u16 tx_cons = *cp->tx_cons_ptr;
 948
 949         if (cp->tx_cons != tx_cons || cp->rx_cons != rx_cons) {
 950                 cp->tx_cons = tx_cons;
 951                 cp->rx_cons = rx_cons;
 952                 uio_event_notify(cp->cnic_uinfo);
 953         }
 954 }
 955
 956 static int cnic_service_bnx2(void *data, void *status_blk)
 957 {
 958         struct cnic_dev *dev = data;
 959         struct status_block *sblk = status_blk;
 960         struct cnic_local *cp = dev->cnic_priv;
 961         u32 status_idx = sblk->status_idx;
 962         u16 hw_prod, sw_prod;
 963         int kcqe_cnt;
 964
 965         if (unlikely(!test_bit(CNIC_F_CNIC_UP, &dev->flags)))
 966                 return status_idx;
 967
 968         cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
 969
 970         hw_prod = sblk->status_completion_producer_index;
 971         sw_prod = cp->kcq_prod_idx;
 972         while (sw_prod != hw_prod) {
 973                 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
 974                 if (kcqe_cnt == 0)
 975                         goto done;
 976
 977                 service_kcqes(dev, kcqe_cnt);
 978
 979                 /* Tell compiler that status_blk fields can change. */
 980                 barrier();
 981                 if (status_idx != sblk->status_idx) {
 982                         status_idx = sblk->status_idx;
 983                         cp->kwq_con_idx = *cp->kwq_con_idx_ptr;
 984                         hw_prod = sblk->status_completion_producer_index;
 985                 } else
 986                         break;
 987         }
 988
 989 done:
 990         CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
 991
 992         cp->kcq_prod_idx = sw_prod;
 993
 994         cnic_chk_bnx2_pkt_rings(cp);
 995         return status_idx;
 996 }
 997
 998 static void cnic_service_bnx2_msix(unsigned long data)
 999 {
1000         struct cnic_dev *dev = (struct cnic_dev *) data;
1001         struct cnic_local *cp = dev->cnic_priv;
1002         struct status_block_msix *status_blk = cp->bnx2_status_blk;
1003         u32 status_idx = status_blk->status_idx;
1004         u16 hw_prod, sw_prod;
1005         int kcqe_cnt;
1006
1007         cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1008
1009         hw_prod = status_blk->status_completion_producer_index;
1010         sw_prod = cp->kcq_prod_idx;
1011         while (sw_prod != hw_prod) {
1012                 kcqe_cnt = cnic_get_kcqes(dev, hw_prod, &sw_prod);
1013                 if (kcqe_cnt == 0)
1014                         goto done;
1015
1016                 service_kcqes(dev, kcqe_cnt);
1017
1018                 /* Tell compiler that status_blk fields can change. */
1019                 barrier();
1020                 if (status_idx != status_blk->status_idx) {
1021                         status_idx = status_blk->status_idx;
1022                         cp->kwq_con_idx = status_blk->status_cmd_consumer_index;
1023                         hw_prod = status_blk->status_completion_producer_index;
1024                 } else
1025                         break;
1026         }
1027
1028 done:
1029         CNIC_WR16(dev, cp->kcq_io_addr, sw_prod);
1030         cp->kcq_prod_idx = sw_prod;
1031
1032         cnic_chk_bnx2_pkt_rings(cp);
1033
1034         cp->last_status_idx = status_idx;
1035         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
1036                 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
1037 }
1038
1039 static irqreturn_t cnic_irq(int irq, void *dev_instance)
1040 {
1041         struct cnic_dev *dev = dev_instance;
1042         struct cnic_local *cp = dev->cnic_priv;
1043         u16 prod = cp->kcq_prod_idx & MAX_KCQ_IDX;
1044
1045         if (cp->ack_int)
1046                 cp->ack_int(dev);
1047
1048         prefetch(cp->status_blk);
1049         prefetch(&cp->kcq[KCQ_PG(prod)][KCQ_IDX(prod)]);
1050
1051         if (likely(test_bit(CNIC_F_CNIC_UP, &dev->flags)))
1052                 tasklet_schedule(&cp->cnic_irq_task);
1053
1054         return IRQ_HANDLED;
1055 }
1056
1057 static void cnic_ulp_stop(struct cnic_dev *dev)
1058 {
1059         struct cnic_local *cp = dev->cnic_priv;
1060         int if_type;
1061
1062         rcu_read_lock();
1063         for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
1064                 struct cnic_ulp_ops *ulp_ops;
1065
1066                 ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
1067                 if (!ulp_ops)
1068                         continue;
1069
1070                 if (test_and_clear_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1071                         ulp_ops->cnic_stop(cp->ulp_handle[if_type]);
1072         }
1073         rcu_read_unlock();
1074 }
1075
1076 static void cnic_ulp_start(struct cnic_dev *dev)
1077 {
1078         struct cnic_local *cp = dev->cnic_priv;
1079         int if_type;
1080
1081         rcu_read_lock();
1082         for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
1083                 struct cnic_ulp_ops *ulp_ops;
1084
1085                 ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
1086                 if (!ulp_ops || !ulp_ops->cnic_start)
1087                         continue;
1088
1089                 if (!test_and_set_bit(ULP_F_START, &cp->ulp_flags[if_type]))
1090                         ulp_ops->cnic_start(cp->ulp_handle[if_type]);
1091         }
1092         rcu_read_unlock();
1093 }
1094
1095 static int cnic_ctl(void *data, struct cnic_ctl_info *info)
1096 {
1097         struct cnic_dev *dev = data;
1098
1099         switch (info->cmd) {
1100         case CNIC_CTL_STOP_CMD:
1101                 cnic_hold(dev);
1102                 mutex_lock(&cnic_lock);
1103
1104                 cnic_ulp_stop(dev);
1105                 cnic_stop_hw(dev);
1106
1107                 mutex_unlock(&cnic_lock);
1108                 cnic_put(dev);
1109                 break;
1110         case CNIC_CTL_START_CMD:
1111                 cnic_hold(dev);
1112                 mutex_lock(&cnic_lock);
1113
1114                 if (!cnic_start_hw(dev))
1115                         cnic_ulp_start(dev);
1116
1117                 mutex_unlock(&cnic_lock);
1118                 cnic_put(dev);
1119                 break;
1120         default:
1121                 return -EINVAL;
1122         }
1123         return 0;
1124 }
1125
1126 static void cnic_ulp_init(struct cnic_dev *dev)
1127 {
1128         int i;
1129         struct cnic_local *cp = dev->cnic_priv;
1130
1131         rcu_read_lock();
1132         for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1133                 struct cnic_ulp_ops *ulp_ops;
1134
1135                 ulp_ops = rcu_dereference(cnic_ulp_tbl[i]);
1136                 if (!ulp_ops || !ulp_ops->cnic_init)
1137                         continue;
1138
1139                 if (!test_and_set_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1140                         ulp_ops->cnic_init(dev);
1141
1142         }
1143         rcu_read_unlock();
1144 }
1145
1146 static void cnic_ulp_exit(struct cnic_dev *dev)
1147 {
1148         int i;
1149         struct cnic_local *cp = dev->cnic_priv;
1150
1151         rcu_read_lock();
1152         for (i = 0; i < MAX_CNIC_ULP_TYPE_EXT; i++) {
1153                 struct cnic_ulp_ops *ulp_ops;
1154
1155                 ulp_ops = rcu_dereference(cnic_ulp_tbl[i]);
1156                 if (!ulp_ops || !ulp_ops->cnic_exit)
1157                         continue;
1158
1159                 if (test_and_clear_bit(ULP_F_INIT, &cp->ulp_flags[i]))
1160                         ulp_ops->cnic_exit(dev);
1161
1162         }
1163         rcu_read_unlock();
1164 }
1165
1166 static int cnic_cm_offload_pg(struct cnic_sock *csk)
1167 {
1168         struct cnic_dev *dev = csk->dev;
1169         struct l4_kwq_offload_pg *l4kwqe;
1170         struct kwqe *wqes[1];
1171
1172         l4kwqe = (struct l4_kwq_offload_pg *) &csk->kwqe1;
1173         memset(l4kwqe, 0, sizeof(*l4kwqe));
1174         wqes[0] = (struct kwqe *) l4kwqe;
1175
1176         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_OFFLOAD_PG;
1177         l4kwqe->flags =
1178                 L4_LAYER_CODE << L4_KWQ_OFFLOAD_PG_LAYER_CODE_SHIFT;
1179         l4kwqe->l2hdr_nbytes = ETH_HLEN;
1180
1181         l4kwqe->da0 = csk->ha[0];
1182         l4kwqe->da1 = csk->ha[1];
1183         l4kwqe->da2 = csk->ha[2];
1184         l4kwqe->da3 = csk->ha[3];
1185         l4kwqe->da4 = csk->ha[4];
1186         l4kwqe->da5 = csk->ha[5];
1187
1188         l4kwqe->sa0 = dev->mac_addr[0];
1189         l4kwqe->sa1 = dev->mac_addr[1];
1190         l4kwqe->sa2 = dev->mac_addr[2];
1191         l4kwqe->sa3 = dev->mac_addr[3];
1192         l4kwqe->sa4 = dev->mac_addr[4];
1193         l4kwqe->sa5 = dev->mac_addr[5];
1194
1195         l4kwqe->etype = ETH_P_IP;
1196         l4kwqe->ipid_count = DEF_IPID_COUNT;
1197         l4kwqe->host_opaque = csk->l5_cid;
1198
1199         if (csk->vlan_id) {
1200                 l4kwqe->pg_flags |= L4_KWQ_OFFLOAD_PG_VLAN_TAGGING;
1201                 l4kwqe->vlan_tag = csk->vlan_id;
1202                 l4kwqe->l2hdr_nbytes += 4;
1203         }
1204
1205         return dev->submit_kwqes(dev, wqes, 1);
1206 }
1207
1208 static int cnic_cm_update_pg(struct cnic_sock *csk)
1209 {
1210         struct cnic_dev *dev = csk->dev;
1211         struct l4_kwq_update_pg *l4kwqe;
1212         struct kwqe *wqes[1];
1213
1214         l4kwqe = (struct l4_kwq_update_pg *) &csk->kwqe1;
1215         memset(l4kwqe, 0, sizeof(*l4kwqe));
1216         wqes[0] = (struct kwqe *) l4kwqe;
1217
1218         l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPDATE_PG;
1219         l4kwqe->flags =
1220                 L4_LAYER_CODE << L4_KWQ_UPDATE_PG_LAYER_CODE_SHIFT;
1221         l4kwqe->pg_cid = csk->pg_cid;
1222
1223         l4kwqe->da0 = csk->ha[0];
1224         l4kwqe->da1 = csk->ha[1];
1225         l4kwqe->da2 = csk->ha[2];
1226         l4kwqe->da3 = csk->ha[3];
1227         l4kwqe->da4 = csk->ha[4];
1228         l4kwqe->da5 = csk->ha[5];
1229
1230         l4kwqe->pg_host_opaque = csk->l5_cid;
1231         l4kwqe->pg_valids = L4_KWQ_UPDATE_PG_VALIDS_DA;
1232
1233         return dev->submit_kwqes(dev, wqes, 1);
1234 }
1235
1236 static int cnic_cm_upload_pg(struct cnic_sock *csk)
1237 {
1238         struct cnic_dev *dev = csk->dev;
1239         struct l4_kwq_upload *l4kwqe;
1240         struct kwqe *wqes[1];
1241
1242         l4kwqe = (struct l4_kwq_upload *) &csk->kwqe1;
1243         memset(l4kwqe, 0, sizeof(*l4kwqe));
1244         wqes[0] = (struct kwqe *) l4kwqe;
1245
1246         l4kwqe->opcode = L4_KWQE_OPCODE_VALUE_UPLOAD_PG;
1247         l4kwqe->flags =
1248                 L4_LAYER_CODE << L4_KWQ_UPLOAD_LAYER_CODE_SHIFT;
1249         l4kwqe->cid = csk->pg_cid;
1250
1251         return dev->submit_kwqes(dev, wqes, 1);
1252 }
1253
1254 static int cnic_cm_conn_req(struct cnic_sock *csk)
1255 {
1256         struct cnic_dev *dev = csk->dev;
1257         struct l4_kwq_connect_req1 *l4kwqe1;
1258         struct l4_kwq_connect_req2 *l4kwqe2;
1259         struct l4_kwq_connect_req3 *l4kwqe3;
1260         struct kwqe *wqes[3];
1261         u8 tcp_flags = 0;
1262         int num_wqes = 2;
1263
1264         l4kwqe1 = (struct l4_kwq_connect_req1 *) &csk->kwqe1;
1265         l4kwqe2 = (struct l4_kwq_connect_req2 *) &csk->kwqe2;
1266         l4kwqe3 = (struct l4_kwq_connect_req3 *) &csk->kwqe3;
1267         memset(l4kwqe1, 0, sizeof(*l4kwqe1));
1268         memset(l4kwqe2, 0, sizeof(*l4kwqe2));
1269         memset(l4kwqe3, 0, sizeof(*l4kwqe3));
1270
1271         l4kwqe3->op_code = L4_KWQE_OPCODE_VALUE_CONNECT3;
1272         l4kwqe3->flags =
1273                 L4_LAYER_CODE << L4_KWQ_CONNECT_REQ3_LAYER_CODE_SHIFT;
1274         l4kwqe3->ka_timeout = csk->ka_timeout;
1275         l4kwqe3->ka_interval = csk->ka_interval;
1276         l4kwqe3->ka_max_probe_count = csk->ka_max_probe_count;
1277         l4kwqe3->tos = csk->tos;
1278         l4kwqe3->ttl = csk->ttl;
1279         l4kwqe3->snd_seq_scale = csk->snd_seq_scale;
1280         l4kwqe3->pmtu = csk->mtu;
1281         l4kwqe3->rcv_buf = csk->rcv_buf;
1282         l4kwqe3->snd_buf = csk->snd_buf;
1283         l4kwqe3->seed = csk->seed;
1284
1285         wqes[0] = (struct kwqe *) l4kwqe1;
1286         if (test_bit(SK_F_IPV6, &csk->flags)) {
1287                 wqes[1] = (struct kwqe *) l4kwqe2;
1288                 wqes[2] = (struct kwqe *) l4kwqe3;
1289                 num_wqes = 3;
1290
1291                 l4kwqe1->conn_flags = L4_KWQ_CONNECT_REQ1_IP_V6;
1292                 l4kwqe2->op_code = L4_KWQE_OPCODE_VALUE_CONNECT2;
1293                 l4kwqe2->flags =
1294                         L4_KWQ_CONNECT_REQ2_LINKED_WITH_NEXT |
1295                         L4_LAYER_CODE << L4_KWQ_CONNECT_REQ2_LAYER_CODE_SHIFT;
1296                 l4kwqe2->src_ip_v6_2 = be32_to_cpu(csk->src_ip[1]);
1297                 l4kwqe2->src_ip_v6_3 = be32_to_cpu(csk->src_ip[2]);
1298                 l4kwqe2->src_ip_v6_4 = be32_to_cpu(csk->src_ip[3]);
1299                 l4kwqe2->dst_ip_v6_2 = be32_to_cpu(csk->dst_ip[1]);
1300                 l4kwqe2->dst_ip_v6_3 = be32_to_cpu(csk->dst_ip[2]);
1301                 l4kwqe2->dst_ip_v6_4 = be32_to_cpu(csk->dst_ip[3]);
1302                 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct ipv6hdr) -
1303                                sizeof(struct tcphdr);
1304         } else {
1305                 wqes[1] = (struct kwqe *) l4kwqe3;
1306                 l4kwqe3->mss = l4kwqe3->pmtu - sizeof(struct iphdr) -
1307                                sizeof(struct tcphdr);
1308         }
1309
1310         l4kwqe1->op_code = L4_KWQE_OPCODE_VALUE_CONNECT1;
1311         l4kwqe1->flags =
1312                 (L4_LAYER_CODE << L4_KWQ_CONNECT_REQ1_LAYER_CODE_SHIFT) |
1313                  L4_KWQ_CONNECT_REQ3_LINKED_WITH_NEXT;
1314         l4kwqe1->cid = csk->cid;
1315         l4kwqe1->pg_cid = csk->pg_cid;
1316         l4kwqe1->src_ip = be32_to_cpu(csk->src_ip[0]);
1317         l4kwqe1->dst_ip = be32_to_cpu(csk->dst_ip[0]);
1318         l4kwqe1->src_port = be16_to_cpu(csk->src_port);
1319         l4kwqe1->dst_port = be16_to_cpu(csk->dst_port);
1320         if (csk->tcp_flags & SK_TCP_NO_DELAY_ACK)
1321                 tcp_flags |= L4_KWQ_CONNECT_REQ1_NO_DELAY_ACK;
1322         if (csk->tcp_flags & SK_TCP_KEEP_ALIVE)
1323                 tcp_flags |= L4_KWQ_CONNECT_REQ1_KEEP_ALIVE;
1324         if (csk->tcp_flags & SK_TCP_NAGLE)
1325                 tcp_flags |= L4_KWQ_CONNECT_REQ1_NAGLE_ENABLE;
1326         if (csk->tcp_flags & SK_TCP_TIMESTAMP)
1327                 tcp_flags |= L4_KWQ_CONNECT_REQ1_TIME_STAMP;
1328         if (csk->tcp_flags & SK_TCP_SACK)
1329                 tcp_flags |= L4_KWQ_CONNECT_REQ1_SACK;
1330         if (csk->tcp_flags & SK_TCP_SEG_SCALING)
1331                 tcp_flags |= L4_KWQ_CONNECT_REQ1_SEG_SCALING;
1332
1333         l4kwqe1->tcp_flags = tcp_flags;
1334
1335         return dev->submit_kwqes(dev, wqes, num_wqes);
1336 }
1337
1338 static int cnic_cm_close_req(struct cnic_sock *csk)
1339 {
1340         struct cnic_dev *dev = csk->dev;
1341         struct l4_kwq_close_req *l4kwqe;
1342         struct kwqe *wqes[1];
1343
1344         l4kwqe = (struct l4_kwq_close_req *) &csk->kwqe2;
1345         memset(l4kwqe, 0, sizeof(*l4kwqe));
1346         wqes[0] = (struct kwqe *) l4kwqe;
1347
1348         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_CLOSE;
1349         l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_CLOSE_REQ_LAYER_CODE_SHIFT;
1350         l4kwqe->cid = csk->cid;
1351
1352         return dev->submit_kwqes(dev, wqes, 1);
1353 }
1354
1355 static int cnic_cm_abort_req(struct cnic_sock *csk)
1356 {
1357         struct cnic_dev *dev = csk->dev;
1358         struct l4_kwq_reset_req *l4kwqe;
1359         struct kwqe *wqes[1];
1360
1361         l4kwqe = (struct l4_kwq_reset_req *) &csk->kwqe2;
1362         memset(l4kwqe, 0, sizeof(*l4kwqe));
1363         wqes[0] = (struct kwqe *) l4kwqe;
1364
1365         l4kwqe->op_code = L4_KWQE_OPCODE_VALUE_RESET;
1366         l4kwqe->flags = L4_LAYER_CODE << L4_KWQ_RESET_REQ_LAYER_CODE_SHIFT;
1367         l4kwqe->cid = csk->cid;
1368
1369         return dev->submit_kwqes(dev, wqes, 1);
1370 }
1371
1372 static int cnic_cm_create(struct cnic_dev *dev, int ulp_type, u32 cid,
1373                           u32 l5_cid, struct cnic_sock **csk, void *context)
1374 {
1375         struct cnic_local *cp = dev->cnic_priv;
1376         struct cnic_sock *csk1;
1377
1378         if (l5_cid >= MAX_CM_SK_TBL_SZ)
1379                 return -EINVAL;
1380
1381         csk1 = &cp->csk_tbl[l5_cid];
1382         if (atomic_read(&csk1->ref_count))
1383                 return -EAGAIN;
1384
1385         if (test_and_set_bit(SK_F_INUSE, &csk1->flags))
1386                 return -EBUSY;
1387
1388         csk1->dev = dev;
1389         csk1->cid = cid;
1390         csk1->l5_cid = l5_cid;
1391         csk1->ulp_type = ulp_type;
1392         csk1->context = context;
1393
1394         csk1->ka_timeout = DEF_KA_TIMEOUT;
1395         csk1->ka_interval = DEF_KA_INTERVAL;
1396         csk1->ka_max_probe_count = DEF_KA_MAX_PROBE_COUNT;
1397         csk1->tos = DEF_TOS;
1398         csk1->ttl = DEF_TTL;
1399         csk1->snd_seq_scale = DEF_SND_SEQ_SCALE;
1400         csk1->rcv_buf = DEF_RCV_BUF;
1401         csk1->snd_buf = DEF_SND_BUF;
1402         csk1->seed = DEF_SEED;
1403
1404         *csk = csk1;
1405         return 0;
1406 }
1407
1408 static void cnic_cm_cleanup(struct cnic_sock *csk)
1409 {
1410         if (csk->src_port) {
1411                 struct cnic_dev *dev = csk->dev;
1412                 struct cnic_local *cp = dev->cnic_priv;
1413
1414                 cnic_free_id(&cp->csk_port_tbl, csk->src_port);
1415                 csk->src_port = 0;
1416         }
1417 }
1418
1419 static void cnic_close_conn(struct cnic_sock *csk)
1420 {
1421         if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags)) {
1422                 cnic_cm_upload_pg(csk);
1423                 clear_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1424         }
1425         cnic_cm_cleanup(csk);
1426 }
1427
1428 static int cnic_cm_destroy(struct cnic_sock *csk)
1429 {
1430         if (!cnic_in_use(csk))
1431                 return -EINVAL;
1432
1433         csk_hold(csk);
1434         clear_bit(SK_F_INUSE, &csk->flags);
1435         smp_mb__after_clear_bit();
1436         while (atomic_read(&csk->ref_count) != 1)
1437                 msleep(1);
1438         cnic_cm_cleanup(csk);
1439
1440         csk->flags = 0;
1441         csk_put(csk);
1442         return 0;
1443 }
1444
1445 static inline u16 cnic_get_vlan(struct net_device *dev,
1446                                 struct net_device **vlan_dev)
1447 {
1448         if (dev->priv_flags & IFF_802_1Q_VLAN) {
1449                 *vlan_dev = vlan_dev_real_dev(dev);
1450                 return vlan_dev_vlan_id(dev);
1451         }
1452         *vlan_dev = dev;
1453         return 0;
1454 }
1455
1456 static int cnic_get_v4_route(struct sockaddr_in *dst_addr,
1457                              struct dst_entry **dst)
1458 {
1459 #if defined(CONFIG_INET)
1460         struct flowi fl;
1461         int err;
1462         struct rtable *rt;
1463
1464         memset(&fl, 0, sizeof(fl));
1465         fl.nl_u.ip4_u.daddr = dst_addr->sin_addr.s_addr;
1466
1467         err = ip_route_output_key(&init_net, &rt, &fl);
1468         if (!err)
1469                 *dst = &rt->u.dst;
1470         return err;
1471 #else
1472         return -ENETUNREACH;
1473 #endif
1474 }
1475
1476 static int cnic_get_v6_route(struct sockaddr_in6 *dst_addr,
1477                              struct dst_entry **dst)
1478 {
1479 #if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
1480         struct flowi fl;
1481
1482         memset(&fl, 0, sizeof(fl));
1483         ipv6_addr_copy(&fl.fl6_dst, &dst_addr->sin6_addr);
1484         if (ipv6_addr_type(&fl.fl6_dst) & IPV6_ADDR_LINKLOCAL)
1485                 fl.oif = dst_addr->sin6_scope_id;
1486
1487         *dst = ip6_route_output(&init_net, NULL, &fl);
1488         if (*dst)
1489                 return 0;
1490 #endif
1491
1492         return -ENETUNREACH;
1493 }
1494
1495 static struct cnic_dev *cnic_cm_select_dev(struct sockaddr_in *dst_addr,
1496                                            int ulp_type)
1497 {
1498         struct cnic_dev *dev = NULL;
1499         struct dst_entry *dst;
1500         struct net_device *netdev = NULL;
1501         int err = -ENETUNREACH;
1502
1503         if (dst_addr->sin_family == AF_INET)
1504                 err = cnic_get_v4_route(dst_addr, &dst);
1505         else if (dst_addr->sin_family == AF_INET6) {
1506                 struct sockaddr_in6 *dst_addr6 =
1507                         (struct sockaddr_in6 *) dst_addr;
1508
1509                 err = cnic_get_v6_route(dst_addr6, &dst);
1510         } else
1511                 return NULL;
1512
1513         if (err)
1514                 return NULL;
1515
1516         if (!dst->dev)
1517                 goto done;
1518
1519         cnic_get_vlan(dst->dev, &netdev);
1520
1521         dev = cnic_from_netdev(netdev);
1522
1523 done:
1524         dst_release(dst);
1525         if (dev)
1526                 cnic_put(dev);
1527         return dev;
1528 }
1529
1530 static int cnic_resolve_addr(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1531 {
1532         struct cnic_dev *dev = csk->dev;
1533         struct cnic_local *cp = dev->cnic_priv;
1534
1535         return cnic_send_nlmsg(cp, ISCSI_KEVENT_PATH_REQ, csk);
1536 }
1537
1538 static int cnic_get_route(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1539 {
1540         struct cnic_dev *dev = csk->dev;
1541         struct cnic_local *cp = dev->cnic_priv;
1542         int is_v6, err, rc = -ENETUNREACH;
1543         struct dst_entry *dst;
1544         struct net_device *realdev;
1545         u32 local_port;
1546
1547         if (saddr->local.v6.sin6_family == AF_INET6 &&
1548             saddr->remote.v6.sin6_family == AF_INET6)
1549                 is_v6 = 1;
1550         else if (saddr->local.v4.sin_family == AF_INET &&
1551                  saddr->remote.v4.sin_family == AF_INET)
1552                 is_v6 = 0;
1553         else
1554                 return -EINVAL;
1555
1556         clear_bit(SK_F_IPV6, &csk->flags);
1557
1558         if (is_v6) {
1559 #if defined(CONFIG_IPV6) || (defined(CONFIG_IPV6_MODULE) && defined(MODULE))
1560                 set_bit(SK_F_IPV6, &csk->flags);
1561                 err = cnic_get_v6_route(&saddr->remote.v6, &dst);
1562                 if (err)
1563                         return err;
1564
1565                 if (!dst || dst->error || !dst->dev)
1566                         goto err_out;
1567
1568                 memcpy(&csk->dst_ip[0], &saddr->remote.v6.sin6_addr,
1569                        sizeof(struct in6_addr));
1570                 csk->dst_port = saddr->remote.v6.sin6_port;
1571                 local_port = saddr->local.v6.sin6_port;
1572 #else
1573                 return rc;
1574 #endif
1575
1576         } else {
1577                 err = cnic_get_v4_route(&saddr->remote.v4, &dst);
1578                 if (err)
1579                         return err;
1580
1581                 if (!dst || dst->error || !dst->dev)
1582                         goto err_out;
1583
1584                 csk->dst_ip[0] = saddr->remote.v4.sin_addr.s_addr;
1585                 csk->dst_port = saddr->remote.v4.sin_port;
1586                 local_port = saddr->local.v4.sin_port;
1587         }
1588
1589         csk->vlan_id = cnic_get_vlan(dst->dev, &realdev);
1590         if (realdev != dev->netdev)
1591                 goto err_out;
1592
1593         if (local_port >= CNIC_LOCAL_PORT_MIN &&
1594             local_port < CNIC_LOCAL_PORT_MAX) {
1595                 if (cnic_alloc_id(&cp->csk_port_tbl, local_port))
1596                         local_port = 0;
1597         } else
1598                 local_port = 0;
1599
1600         if (!local_port) {
1601                 local_port = cnic_alloc_new_id(&cp->csk_port_tbl);
1602                 if (local_port == -1) {
1603                         rc = -ENOMEM;
1604                         goto err_out;
1605                 }
1606         }
1607         csk->src_port = local_port;
1608
1609         csk->mtu = dst_mtu(dst);
1610         rc = 0;
1611
1612 err_out:
1613         dst_release(dst);
1614         return rc;
1615 }
1616
1617 static void cnic_init_csk_state(struct cnic_sock *csk)
1618 {
1619         csk->state = 0;
1620         clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1621         clear_bit(SK_F_CLOSING, &csk->flags);
1622 }
1623
1624 static int cnic_cm_connect(struct cnic_sock *csk, struct cnic_sockaddr *saddr)
1625 {
1626         int err = 0;
1627
1628         if (!cnic_in_use(csk))
1629                 return -EINVAL;
1630
1631         if (test_and_set_bit(SK_F_CONNECT_START, &csk->flags))
1632                 return -EINVAL;
1633
1634         cnic_init_csk_state(csk);
1635
1636         err = cnic_get_route(csk, saddr);
1637         if (err)
1638                 goto err_out;
1639
1640         err = cnic_resolve_addr(csk, saddr);
1641         if (!err)
1642                 return 0;
1643
1644 err_out:
1645         clear_bit(SK_F_CONNECT_START, &csk->flags);
1646         return err;
1647 }
1648
1649 static int cnic_cm_abort(struct cnic_sock *csk)
1650 {
1651         struct cnic_local *cp = csk->dev->cnic_priv;
1652         u32 opcode;
1653
1654         if (!cnic_in_use(csk))
1655                 return -EINVAL;
1656
1657         if (cnic_abort_prep(csk))
1658                 return cnic_cm_abort_req(csk);
1659
1660         /* Getting here means that we haven't started connect, or
1661          * connect was not successful.
1662          */
1663
1664         csk->state = L4_KCQE_OPCODE_VALUE_RESET_COMP;
1665         if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1666                 opcode = csk->state;
1667         else
1668                 opcode = L5CM_RAMROD_CMD_ID_TERMINATE_OFFLOAD;
1669         cp->close_conn(csk, opcode);
1670
1671         return 0;
1672 }
1673
1674 static int cnic_cm_close(struct cnic_sock *csk)
1675 {
1676         if (!cnic_in_use(csk))
1677                 return -EINVAL;
1678
1679         if (cnic_close_prep(csk)) {
1680                 csk->state = L4_KCQE_OPCODE_VALUE_CLOSE_COMP;
1681                 return cnic_cm_close_req(csk);
1682         }
1683         return 0;
1684 }
1685
1686 static void cnic_cm_upcall(struct cnic_local *cp, struct cnic_sock *csk,
1687                            u8 opcode)
1688 {
1689         struct cnic_ulp_ops *ulp_ops;
1690         int ulp_type = csk->ulp_type;
1691
1692         rcu_read_lock();
1693         ulp_ops = rcu_dereference(cp->ulp_ops[ulp_type]);
1694         if (ulp_ops) {
1695                 if (opcode == L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE)
1696                         ulp_ops->cm_connect_complete(csk);
1697                 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)
1698                         ulp_ops->cm_close_complete(csk);
1699                 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED)
1700                         ulp_ops->cm_remote_abort(csk);
1701                 else if (opcode == L4_KCQE_OPCODE_VALUE_RESET_COMP)
1702                         ulp_ops->cm_abort_complete(csk);
1703                 else if (opcode == L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED)
1704                         ulp_ops->cm_remote_close(csk);
1705         }
1706         rcu_read_unlock();
1707 }
1708
1709 static int cnic_cm_set_pg(struct cnic_sock *csk)
1710 {
1711         if (cnic_offld_prep(csk)) {
1712                 if (test_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags))
1713                         cnic_cm_update_pg(csk);
1714                 else
1715                         cnic_cm_offload_pg(csk);
1716         }
1717         return 0;
1718 }
1719
1720 static void cnic_cm_process_offld_pg(struct cnic_dev *dev, struct l4_kcq *kcqe)
1721 {
1722         struct cnic_local *cp = dev->cnic_priv;
1723         u32 l5_cid = kcqe->pg_host_opaque;
1724         u8 opcode = kcqe->op_code;
1725         struct cnic_sock *csk = &cp->csk_tbl[l5_cid];
1726
1727         csk_hold(csk);
1728         if (!cnic_in_use(csk))
1729                 goto done;
1730
1731         if (opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1732                 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1733                 goto done;
1734         }
1735         csk->pg_cid = kcqe->pg_cid;
1736         set_bit(SK_F_PG_OFFLD_COMPLETE, &csk->flags);
1737         cnic_cm_conn_req(csk);
1738
1739 done:
1740         csk_put(csk);
1741 }
1742
1743 static void cnic_cm_process_kcqe(struct cnic_dev *dev, struct kcqe *kcqe)
1744 {
1745         struct cnic_local *cp = dev->cnic_priv;
1746         struct l4_kcq *l4kcqe = (struct l4_kcq *) kcqe;
1747         u8 opcode = l4kcqe->op_code;
1748         u32 l5_cid;
1749         struct cnic_sock *csk;
1750
1751         if (opcode == L4_KCQE_OPCODE_VALUE_OFFLOAD_PG ||
1752             opcode == L4_KCQE_OPCODE_VALUE_UPDATE_PG) {
1753                 cnic_cm_process_offld_pg(dev, l4kcqe);
1754                 return;
1755         }
1756
1757         l5_cid = l4kcqe->conn_id;
1758         if (opcode & 0x80)
1759                 l5_cid = l4kcqe->cid;
1760         if (l5_cid >= MAX_CM_SK_TBL_SZ)
1761                 return;
1762
1763         csk = &cp->csk_tbl[l5_cid];
1764         csk_hold(csk);
1765
1766         if (!cnic_in_use(csk)) {
1767                 csk_put(csk);
1768                 return;
1769         }
1770
1771         switch (opcode) {
1772         case L4_KCQE_OPCODE_VALUE_CONNECT_COMPLETE:
1773                 if (l4kcqe->status == 0)
1774                         set_bit(SK_F_OFFLD_COMPLETE, &csk->flags);
1775
1776                 smp_mb__before_clear_bit();
1777                 clear_bit(SK_F_OFFLD_SCHED, &csk->flags);
1778                 cnic_cm_upcall(cp, csk, opcode);
1779                 break;
1780
1781         case L4_KCQE_OPCODE_VALUE_RESET_RECEIVED:
1782                 if (test_and_clear_bit(SK_F_OFFLD_COMPLETE, &csk->flags))
1783                         csk->state = opcode;
1784                 /* fall through */
1785         case L4_KCQE_OPCODE_VALUE_CLOSE_COMP:
1786         case L4_KCQE_OPCODE_VALUE_RESET_COMP:
1787                 cp->close_conn(csk, opcode);
1788                 break;
1789
1790         case L4_KCQE_OPCODE_VALUE_CLOSE_RECEIVED:
1791                 cnic_cm_upcall(cp, csk, opcode);
1792                 break;
1793         }
1794         csk_put(csk);
1795 }
1796
1797 static void cnic_cm_indicate_kcqe(void *data, struct kcqe *kcqe[], u32 num)
1798 {
1799         struct cnic_dev *dev = data;
1800         int i;
1801
1802         for (i = 0; i < num; i++)
1803                 cnic_cm_process_kcqe(dev, kcqe[i]);
1804 }
1805
1806 static struct cnic_ulp_ops cm_ulp_ops = {
1807         .indicate_kcqes         = cnic_cm_indicate_kcqe,
1808 };
1809
1810 static void cnic_cm_free_mem(struct cnic_dev *dev)
1811 {
1812         struct cnic_local *cp = dev->cnic_priv;
1813
1814         kfree(cp->csk_tbl);
1815         cp->csk_tbl = NULL;
1816         cnic_free_id_tbl(&cp->csk_port_tbl);
1817 }
1818
1819 static int cnic_cm_alloc_mem(struct cnic_dev *dev)
1820 {
1821         struct cnic_local *cp = dev->cnic_priv;
1822
1823         cp->csk_tbl = kzalloc(sizeof(struct cnic_sock) * MAX_CM_SK_TBL_SZ,
1824                               GFP_KERNEL);
1825         if (!cp->csk_tbl)
1826                 return -ENOMEM;
1827
1828         if (cnic_init_id_tbl(&cp->csk_port_tbl, CNIC_LOCAL_PORT_RANGE,
1829                              CNIC_LOCAL_PORT_MIN)) {
1830                 cnic_cm_free_mem(dev);
1831                 return -ENOMEM;
1832         }
1833         return 0;
1834 }
1835
1836 static int cnic_ready_to_close(struct cnic_sock *csk, u32 opcode)
1837 {
1838         if ((opcode == csk->state) ||
1839             (opcode == L4_KCQE_OPCODE_VALUE_RESET_RECEIVED &&
1840              csk->state == L4_KCQE_OPCODE_VALUE_CLOSE_COMP)) {
1841                 if (!test_and_set_bit(SK_F_CLOSING, &csk->flags))
1842                         return 1;
1843         }
1844         return 0;
1845 }
1846
1847 static void cnic_close_bnx2_conn(struct cnic_sock *csk, u32 opcode)
1848 {
1849         struct cnic_dev *dev = csk->dev;
1850         struct cnic_local *cp = dev->cnic_priv;
1851
1852         clear_bit(SK_F_CONNECT_START, &csk->flags);
1853         if (cnic_ready_to_close(csk, opcode)) {
1854                 cnic_close_conn(csk);
1855                 cnic_cm_upcall(cp, csk, opcode);
1856         }
1857 }
1858
1859 static void cnic_cm_stop_bnx2_hw(struct cnic_dev *dev)
1860 {
1861 }
1862
1863 static int cnic_cm_init_bnx2_hw(struct cnic_dev *dev)
1864 {
1865         u32 seed;
1866
1867         get_random_bytes(&seed, 4);
1868         cnic_ctx_wr(dev, 45, 0, seed);
1869         return 0;
1870 }
1871
1872 static int cnic_cm_open(struct cnic_dev *dev)
1873 {
1874         struct cnic_local *cp = dev->cnic_priv;
1875         int err;
1876
1877         err = cnic_cm_alloc_mem(dev);
1878         if (err)
1879                 return err;
1880
1881         err = cp->start_cm(dev);
1882
1883         if (err)
1884                 goto err_out;
1885
1886         dev->cm_create = cnic_cm_create;
1887         dev->cm_destroy = cnic_cm_destroy;
1888         dev->cm_connect = cnic_cm_connect;
1889         dev->cm_abort = cnic_cm_abort;
1890         dev->cm_close = cnic_cm_close;
1891         dev->cm_select_dev = cnic_cm_select_dev;
1892
1893         cp->ulp_handle[CNIC_ULP_L4] = dev;
1894         rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], &cm_ulp_ops);
1895         return 0;
1896
1897 err_out:
1898         cnic_cm_free_mem(dev);
1899         return err;
1900 }
1901
1902 static int cnic_cm_shutdown(struct cnic_dev *dev)
1903 {
1904         struct cnic_local *cp = dev->cnic_priv;
1905         int i;
1906
1907         cp->stop_cm(dev);
1908
1909         if (!cp->csk_tbl)
1910                 return 0;
1911
1912         for (i = 0; i < MAX_CM_SK_TBL_SZ; i++) {
1913                 struct cnic_sock *csk = &cp->csk_tbl[i];
1914
1915                 clear_bit(SK_F_INUSE, &csk->flags);
1916                 cnic_cm_cleanup(csk);
1917         }
1918         cnic_cm_free_mem(dev);
1919
1920         return 0;
1921 }
1922
1923 static void cnic_init_context(struct cnic_dev *dev, u32 cid)
1924 {
1925         struct cnic_local *cp = dev->cnic_priv;
1926         u32 cid_addr;
1927         int i;
1928
1929         if (CHIP_NUM(cp) == CHIP_NUM_5709)
1930                 return;
1931
1932         cid_addr = GET_CID_ADDR(cid);
1933
1934         for (i = 0; i < CTX_SIZE; i += 4)
1935                 cnic_ctx_wr(dev, cid_addr, i, 0);
1936 }
1937
1938 static int cnic_setup_5709_context(struct cnic_dev *dev, int valid)
1939 {
1940         struct cnic_local *cp = dev->cnic_priv;
1941         int ret = 0, i;
1942         u32 valid_bit = valid ? BNX2_CTX_HOST_PAGE_TBL_DATA0_VALID : 0;
1943
1944         if (CHIP_NUM(cp) != CHIP_NUM_5709)
1945                 return 0;
1946
1947         for (i = 0; i < cp->ctx_blks; i++) {
1948                 int j;
1949                 u32 idx = cp->ctx_arr[i].cid / cp->cids_per_blk;
1950                 u32 val;
1951
1952                 memset(cp->ctx_arr[i].ctx, 0, BCM_PAGE_SIZE);
1953
1954                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA0,
1955                         (cp->ctx_arr[i].mapping & 0xffffffff) | valid_bit);
1956                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_DATA1,
1957                         (u64) cp->ctx_arr[i].mapping >> 32);
1958                 CNIC_WR(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL, idx |
1959                         BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ);
1960                 for (j = 0; j < 10; j++) {
1961
1962                         val = CNIC_RD(dev, BNX2_CTX_HOST_PAGE_TBL_CTRL);
1963                         if (!(val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ))
1964                                 break;
1965                         udelay(5);
1966                 }
1967                 if (val & BNX2_CTX_HOST_PAGE_TBL_CTRL_WRITE_REQ) {
1968                         ret = -EBUSY;
1969                         break;
1970                 }
1971         }
1972         return ret;
1973 }
1974
1975 static void cnic_free_irq(struct cnic_dev *dev)
1976 {
1977         struct cnic_local *cp = dev->cnic_priv;
1978         struct cnic_eth_dev *ethdev = cp->ethdev;
1979
1980         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
1981                 cp->disable_int_sync(dev);
1982                 tasklet_disable(&cp->cnic_irq_task);
1983                 free_irq(ethdev->irq_arr[0].vector, dev);
1984         }
1985 }
1986
1987 static int cnic_init_bnx2_irq(struct cnic_dev *dev)
1988 {
1989         struct cnic_local *cp = dev->cnic_priv;
1990         struct cnic_eth_dev *ethdev = cp->ethdev;
1991
1992         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
1993                 int err, i = 0;
1994                 int sblk_num = cp->status_blk_num;
1995                 u32 base = ((sblk_num - 1) * BNX2_HC_SB_CONFIG_SIZE) +
1996                            BNX2_HC_SB_CONFIG_1;
1997
1998                 CNIC_WR(dev, base, BNX2_HC_SB_CONFIG_1_ONE_SHOT);
1999
2000                 CNIC_WR(dev, base + BNX2_HC_COMP_PROD_TRIP_OFF, (2 << 16) | 8);
2001                 CNIC_WR(dev, base + BNX2_HC_COM_TICKS_OFF, (64 << 16) | 220);
2002                 CNIC_WR(dev, base + BNX2_HC_CMD_TICKS_OFF, (64 << 16) | 220);
2003
2004                 cp->bnx2_status_blk = cp->status_blk;
2005                 cp->last_status_idx = cp->bnx2_status_blk->status_idx;
2006                 tasklet_init(&cp->cnic_irq_task, &cnic_service_bnx2_msix,
2007                              (unsigned long) dev);
2008                 err = request_irq(ethdev->irq_arr[0].vector, cnic_irq, 0,
2009                                   "cnic", dev);
2010                 if (err) {
2011                         tasklet_disable(&cp->cnic_irq_task);
2012                         return err;
2013                 }
2014                 while (cp->bnx2_status_blk->status_completion_producer_index &&
2015                        i < 10) {
2016                         CNIC_WR(dev, BNX2_HC_COALESCE_NOW,
2017                                 1 << (11 + sblk_num));
2018                         udelay(10);
2019                         i++;
2020                         barrier();
2021                 }
2022                 if (cp->bnx2_status_blk->status_completion_producer_index) {
2023                         cnic_free_irq(dev);
2024                         goto failed;
2025                 }
2026
2027         } else {
2028                 struct status_block *sblk = cp->status_blk;
2029                 u32 hc_cmd = CNIC_RD(dev, BNX2_HC_COMMAND);
2030                 int i = 0;
2031
2032                 while (sblk->status_completion_producer_index && i < 10) {
2033                         CNIC_WR(dev, BNX2_HC_COMMAND,
2034                                 hc_cmd | BNX2_HC_COMMAND_COAL_NOW_WO_INT);
2035                         udelay(10);
2036                         i++;
2037                         barrier();
2038                 }
2039                 if (sblk->status_completion_producer_index)
2040                         goto failed;
2041
2042         }
2043         return 0;
2044
2045 failed:
2046         printk(KERN_ERR PFX "%s: " "KCQ index not resetting to 0.\n",
2047                dev->netdev->name);
2048         return -EBUSY;
2049 }
2050
2051 static void cnic_enable_bnx2_int(struct cnic_dev *dev)
2052 {
2053         struct cnic_local *cp = dev->cnic_priv;
2054         struct cnic_eth_dev *ethdev = cp->ethdev;
2055
2056         if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
2057                 return;
2058
2059         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2060                 BNX2_PCICFG_INT_ACK_CMD_INDEX_VALID | cp->last_status_idx);
2061 }
2062
2063 static void cnic_disable_bnx2_int_sync(struct cnic_dev *dev)
2064 {
2065         struct cnic_local *cp = dev->cnic_priv;
2066         struct cnic_eth_dev *ethdev = cp->ethdev;
2067
2068         if (!(ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX))
2069                 return;
2070
2071         CNIC_WR(dev, BNX2_PCICFG_INT_ACK_CMD, cp->int_num |
2072                 BNX2_PCICFG_INT_ACK_CMD_MASK_INT);
2073         CNIC_RD(dev, BNX2_PCICFG_INT_ACK_CMD);
2074         synchronize_irq(ethdev->irq_arr[0].vector);
2075 }
2076
2077 static void cnic_init_bnx2_tx_ring(struct cnic_dev *dev)
2078 {
2079         struct cnic_local *cp = dev->cnic_priv;
2080         struct cnic_eth_dev *ethdev = cp->ethdev;
2081         u32 cid_addr, tx_cid, sb_id;
2082         u32 val, offset0, offset1, offset2, offset3;
2083         int i;
2084         struct tx_bd *txbd;
2085         dma_addr_t buf_map;
2086         struct status_block *s_blk = cp->status_blk;
2087
2088         sb_id = cp->status_blk_num;
2089         tx_cid = 20;
2090         cnic_init_context(dev, tx_cid);
2091         cnic_init_context(dev, tx_cid + 1);
2092         cp->tx_cons_ptr = &s_blk->status_tx_quick_consumer_index2;
2093         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2094                 struct status_block_msix *sblk = cp->status_blk;
2095
2096                 tx_cid = TX_TSS_CID + sb_id - 1;
2097                 cnic_init_context(dev, tx_cid);
2098                 CNIC_WR(dev, BNX2_TSCH_TSS_CFG, (sb_id << 24) |
2099                         (TX_TSS_CID << 7));
2100                 cp->tx_cons_ptr = &sblk->status_tx_quick_consumer_index;
2101         }
2102         cp->tx_cons = *cp->tx_cons_ptr;
2103
2104         cid_addr = GET_CID_ADDR(tx_cid);
2105         if (CHIP_NUM(cp) == CHIP_NUM_5709) {
2106                 u32 cid_addr2 = GET_CID_ADDR(tx_cid + 4) + 0x40;
2107
2108                 for (i = 0; i < PHY_CTX_SIZE; i += 4)
2109                         cnic_ctx_wr(dev, cid_addr2, i, 0);
2110
2111                 offset0 = BNX2_L2CTX_TYPE_XI;
2112                 offset1 = BNX2_L2CTX_CMD_TYPE_XI;
2113                 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI_XI;
2114                 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO_XI;
2115         } else {
2116                 offset0 = BNX2_L2CTX_TYPE;
2117                 offset1 = BNX2_L2CTX_CMD_TYPE;
2118                 offset2 = BNX2_L2CTX_TBDR_BHADDR_HI;
2119                 offset3 = BNX2_L2CTX_TBDR_BHADDR_LO;
2120         }
2121         val = BNX2_L2CTX_TYPE_TYPE_L2 | BNX2_L2CTX_TYPE_SIZE_L2;
2122         cnic_ctx_wr(dev, cid_addr, offset0, val);
2123
2124         val = BNX2_L2CTX_CMD_TYPE_TYPE_L2 | (8 << 16);
2125         cnic_ctx_wr(dev, cid_addr, offset1, val);
2126
2127         txbd = (struct tx_bd *) cp->l2_ring;
2128
2129         buf_map = cp->l2_buf_map;
2130         for (i = 0; i < MAX_TX_DESC_CNT; i++, txbd++) {
2131                 txbd->tx_bd_haddr_hi = (u64) buf_map >> 32;
2132                 txbd->tx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2133         }
2134         val = (u64) cp->l2_ring_map >> 32;
2135         cnic_ctx_wr(dev, cid_addr, offset2, val);
2136         txbd->tx_bd_haddr_hi = val;
2137
2138         val = (u64) cp->l2_ring_map & 0xffffffff;
2139         cnic_ctx_wr(dev, cid_addr, offset3, val);
2140         txbd->tx_bd_haddr_lo = val;
2141 }
2142
2143 static void cnic_init_bnx2_rx_ring(struct cnic_dev *dev)
2144 {
2145         struct cnic_local *cp = dev->cnic_priv;
2146         struct cnic_eth_dev *ethdev = cp->ethdev;
2147         u32 cid_addr, sb_id, val, coal_reg, coal_val;
2148         int i;
2149         struct rx_bd *rxbd;
2150         struct status_block *s_blk = cp->status_blk;
2151
2152         sb_id = cp->status_blk_num;
2153         cnic_init_context(dev, 2);
2154         cp->rx_cons_ptr = &s_blk->status_rx_quick_consumer_index2;
2155         coal_reg = BNX2_HC_COMMAND;
2156         coal_val = CNIC_RD(dev, coal_reg);
2157         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2158                 struct status_block_msix *sblk = cp->status_blk;
2159
2160                 cp->rx_cons_ptr = &sblk->status_rx_quick_consumer_index;
2161                 coal_reg = BNX2_HC_COALESCE_NOW;
2162                 coal_val = 1 << (11 + sb_id);
2163         }
2164         i = 0;
2165         while (!(*cp->rx_cons_ptr != 0) && i < 10) {
2166                 CNIC_WR(dev, coal_reg, coal_val);
2167                 udelay(10);
2168                 i++;
2169                 barrier();
2170         }
2171         cp->rx_cons = *cp->rx_cons_ptr;
2172
2173         cid_addr = GET_CID_ADDR(2);
2174         val = BNX2_L2CTX_CTX_TYPE_CTX_BD_CHN_TYPE_VALUE |
2175               BNX2_L2CTX_CTX_TYPE_SIZE_L2 | (0x02 << 8);
2176         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_CTX_TYPE, val);
2177
2178         if (sb_id == 0)
2179                 val = 2 << BNX2_L2CTX_STATUSB_NUM_SHIFT;
2180         else
2181                 val = BNX2_L2CTX_STATUSB_NUM(sb_id);
2182         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_HOST_BDIDX, val);
2183
2184         rxbd = (struct rx_bd *) (cp->l2_ring + BCM_PAGE_SIZE);
2185         for (i = 0; i < MAX_RX_DESC_CNT; i++, rxbd++) {
2186                 dma_addr_t buf_map;
2187                 int n = (i % cp->l2_rx_ring_size) + 1;
2188
2189                 buf_map = cp->l2_buf_map + (n * cp->l2_single_buf_size);
2190                 rxbd->rx_bd_len = cp->l2_single_buf_size;
2191                 rxbd->rx_bd_flags = RX_BD_FLAGS_START | RX_BD_FLAGS_END;
2192                 rxbd->rx_bd_haddr_hi = (u64) buf_map >> 32;
2193                 rxbd->rx_bd_haddr_lo = (u64) buf_map & 0xffffffff;
2194         }
2195         val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) >> 32;
2196         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_HI, val);
2197         rxbd->rx_bd_haddr_hi = val;
2198
2199         val = (u64) (cp->l2_ring_map + BCM_PAGE_SIZE) & 0xffffffff;
2200         cnic_ctx_wr(dev, cid_addr, BNX2_L2CTX_NX_BDHADDR_LO, val);
2201         rxbd->rx_bd_haddr_lo = val;
2202
2203         val = cnic_reg_rd_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD);
2204         cnic_reg_wr_ind(dev, BNX2_RXP_SCRATCH_RXP_FLOOD, val | (1 << 2));
2205 }
2206
2207 static void cnic_shutdown_bnx2_rx_ring(struct cnic_dev *dev)
2208 {
2209         struct kwqe *wqes[1], l2kwqe;
2210
2211         memset(&l2kwqe, 0, sizeof(l2kwqe));
2212         wqes[0] = &l2kwqe;
2213         l2kwqe.kwqe_op_flag = (L2_LAYER_CODE << KWQE_FLAGS_LAYER_SHIFT) |
2214                               (L2_KWQE_OPCODE_VALUE_FLUSH <<
2215                                KWQE_OPCODE_SHIFT) | 2;
2216         dev->submit_kwqes(dev, wqes, 1);
2217 }
2218
2219 static void cnic_set_bnx2_mac(struct cnic_dev *dev)
2220 {
2221         struct cnic_local *cp = dev->cnic_priv;
2222         u32 val;
2223
2224         val = cp->func << 2;
2225
2226         cp->shmem_base = cnic_reg_rd_ind(dev, BNX2_SHM_HDR_ADDR_0 + val);
2227
2228         val = cnic_reg_rd_ind(dev, cp->shmem_base +
2229                               BNX2_PORT_HW_CFG_ISCSI_MAC_UPPER);
2230         dev->mac_addr[0] = (u8) (val >> 8);
2231         dev->mac_addr[1] = (u8) val;
2232
2233         CNIC_WR(dev, BNX2_EMAC_MAC_MATCH4, val);
2234
2235         val = cnic_reg_rd_ind(dev, cp->shmem_base +
2236                               BNX2_PORT_HW_CFG_ISCSI_MAC_LOWER);
2237         dev->mac_addr[2] = (u8) (val >> 24);
2238         dev->mac_addr[3] = (u8) (val >> 16);
2239         dev->mac_addr[4] = (u8) (val >> 8);
2240         dev->mac_addr[5] = (u8) val;
2241
2242         CNIC_WR(dev, BNX2_EMAC_MAC_MATCH5, val);
2243
2244         val = 4 | BNX2_RPM_SORT_USER2_BC_EN;
2245         if (CHIP_NUM(cp) != CHIP_NUM_5709)
2246                 val |= BNX2_RPM_SORT_USER2_PROM_VLAN;
2247
2248         CNIC_WR(dev, BNX2_RPM_SORT_USER2, 0x0);
2249         CNIC_WR(dev, BNX2_RPM_SORT_USER2, val);
2250         CNIC_WR(dev, BNX2_RPM_SORT_USER2, val | BNX2_RPM_SORT_USER2_ENA);
2251 }
2252
2253 static int cnic_start_bnx2_hw(struct cnic_dev *dev)
2254 {
2255         struct cnic_local *cp = dev->cnic_priv;
2256         struct cnic_eth_dev *ethdev = cp->ethdev;
2257         struct status_block *sblk = cp->status_blk;
2258         u32 val;
2259         int err;
2260
2261         cnic_set_bnx2_mac(dev);
2262
2263         val = CNIC_RD(dev, BNX2_MQ_CONFIG);
2264         val &= ~BNX2_MQ_CONFIG_KNL_BYP_BLK_SIZE;
2265         if (BCM_PAGE_BITS > 12)
2266                 val |= (12 - 8)  << 4;
2267         else
2268                 val |= (BCM_PAGE_BITS - 8)  << 4;
2269
2270         CNIC_WR(dev, BNX2_MQ_CONFIG, val);
2271
2272         CNIC_WR(dev, BNX2_HC_COMP_PROD_TRIP, (2 << 16) | 8);
2273         CNIC_WR(dev, BNX2_HC_COM_TICKS, (64 << 16) | 220);
2274         CNIC_WR(dev, BNX2_HC_CMD_TICKS, (64 << 16) | 220);
2275
2276         err = cnic_setup_5709_context(dev, 1);
2277         if (err)
2278                 return err;
2279
2280         cnic_init_context(dev, KWQ_CID);
2281         cnic_init_context(dev, KCQ_CID);
2282
2283         cp->kwq_cid_addr = GET_CID_ADDR(KWQ_CID);
2284         cp->kwq_io_addr = MB_GET_CID_ADDR(KWQ_CID) + L5_KRNLQ_HOST_QIDX;
2285
2286         cp->max_kwq_idx = MAX_KWQ_IDX;
2287         cp->kwq_prod_idx = 0;
2288         cp->kwq_con_idx = 0;
2289         cp->cnic_local_flags |= CNIC_LCL_FL_KWQ_INIT;
2290
2291         if (CHIP_NUM(cp) == CHIP_NUM_5706 || CHIP_NUM(cp) == CHIP_NUM_5708)
2292                 cp->kwq_con_idx_ptr = &sblk->status_rx_quick_consumer_index15;
2293         else
2294                 cp->kwq_con_idx_ptr = &sblk->status_cmd_consumer_index;
2295
2296         /* Initialize the kernel work queue context. */
2297         val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2298               (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2299         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_TYPE, val);
2300
2301         val = (BCM_PAGE_SIZE / sizeof(struct kwqe) - 1) << 16;
2302         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2303
2304         val = ((BCM_PAGE_SIZE / sizeof(struct kwqe)) << 16) | KWQ_PAGE_CNT;
2305         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2306
2307         val = (u32) ((u64) cp->kwq_info.pgtbl_map >> 32);
2308         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2309
2310         val = (u32) cp->kwq_info.pgtbl_map;
2311         cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2312
2313         cp->kcq_cid_addr = GET_CID_ADDR(KCQ_CID);
2314         cp->kcq_io_addr = MB_GET_CID_ADDR(KCQ_CID) + L5_KRNLQ_HOST_QIDX;
2315
2316         cp->kcq_prod_idx = 0;
2317
2318         /* Initialize the kernel complete queue context. */
2319         val = KRNLQ_TYPE_TYPE_KRNLQ | KRNLQ_SIZE_TYPE_SIZE |
2320               (BCM_PAGE_BITS - 8) | KRNLQ_FLAGS_QE_SELF_SEQ;
2321         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_TYPE, val);
2322
2323         val = (BCM_PAGE_SIZE / sizeof(struct kcqe) - 1) << 16;
2324         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_QE_SELF_SEQ_MAX, val);
2325
2326         val = ((BCM_PAGE_SIZE / sizeof(struct kcqe)) << 16) | KCQ_PAGE_CNT;
2327         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_NPAGES, val);
2328
2329         val = (u32) ((u64) cp->kcq_info.pgtbl_map >> 32);
2330         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_HI, val);
2331
2332         val = (u32) cp->kcq_info.pgtbl_map;
2333         cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_PGTBL_HADDR_LO, val);
2334
2335         cp->int_num = 0;
2336         if (ethdev->drv_state & CNIC_DRV_STATE_USING_MSIX) {
2337                 u32 sb_id = cp->status_blk_num;
2338                 u32 sb = BNX2_L2CTX_STATUSB_NUM(sb_id);
2339
2340                 cp->int_num = sb_id << BNX2_PCICFG_INT_ACK_CMD_INT_NUM_SHIFT;
2341                 cnic_ctx_wr(dev, cp->kwq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2342                 cnic_ctx_wr(dev, cp->kcq_cid_addr, L5_KRNLQ_HOST_QIDX, sb);
2343         }
2344
2345         /* Enable Commnad Scheduler notification when we write to the
2346          * host producer index of the kernel contexts. */
2347         CNIC_WR(dev, BNX2_MQ_KNL_CMD_MASK1, 2);
2348
2349         /* Enable Command Scheduler notification when we write to either
2350          * the Send Queue or Receive Queue producer indexes of the kernel
2351          * bypass contexts. */
2352         CNIC_WR(dev, BNX2_MQ_KNL_BYP_CMD_MASK1, 7);
2353         CNIC_WR(dev, BNX2_MQ_KNL_BYP_WRITE_MASK1, 7);
2354
2355         /* Notify COM when the driver post an application buffer. */
2356         CNIC_WR(dev, BNX2_MQ_KNL_RX_V2P_MASK2, 0x2000);
2357
2358         /* Set the CP and COM doorbells.  These two processors polls the
2359          * doorbell for a non zero value before running.  This must be done
2360          * after setting up the kernel queue contexts. */
2361         cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 1);
2362         cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 1);
2363
2364         cnic_init_bnx2_tx_ring(dev);
2365         cnic_init_bnx2_rx_ring(dev);
2366
2367         err = cnic_init_bnx2_irq(dev);
2368         if (err) {
2369                 printk(KERN_ERR PFX "%s: cnic_init_irq failed\n",
2370                        dev->netdev->name);
2371                 cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2372                 cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2373                 return err;
2374         }
2375
2376         return 0;
2377 }
2378
2379 static int cnic_start_hw(struct cnic_dev *dev)
2380 {
2381         struct cnic_local *cp = dev->cnic_priv;
2382         struct cnic_eth_dev *ethdev = cp->ethdev;
2383         int err;
2384
2385         if (test_bit(CNIC_F_CNIC_UP, &dev->flags))
2386                 return -EALREADY;
2387
2388         err = ethdev->drv_register_cnic(dev->netdev, cp->cnic_ops, dev);
2389         if (err) {
2390                 printk(KERN_ERR PFX "%s: register_cnic failed\n",
2391                        dev->netdev->name);
2392                 goto err2;
2393         }
2394
2395         dev->regview = ethdev->io_base;
2396         cp->chip_id = ethdev->chip_id;
2397         pci_dev_get(dev->pcidev);
2398         cp->func = PCI_FUNC(dev->pcidev->devfn);
2399         cp->status_blk = ethdev->irq_arr[0].status_blk;
2400         cp->status_blk_num = ethdev->irq_arr[0].status_blk_num;
2401
2402         err = cp->alloc_resc(dev);
2403         if (err) {
2404                 printk(KERN_ERR PFX "%s: allocate resource failure\n",
2405                        dev->netdev->name);
2406                 goto err1;
2407         }
2408
2409         err = cp->start_hw(dev);
2410         if (err)
2411                 goto err1;
2412
2413         err = cnic_cm_open(dev);
2414         if (err)
2415                 goto err1;
2416
2417         set_bit(CNIC_F_CNIC_UP, &dev->flags);
2418
2419         cp->enable_int(dev);
2420
2421         return 0;
2422
2423 err1:
2424         ethdev->drv_unregister_cnic(dev->netdev);
2425         cp->free_resc(dev);
2426         pci_dev_put(dev->pcidev);
2427 err2:
2428         return err;
2429 }
2430
2431 static void cnic_stop_bnx2_hw(struct cnic_dev *dev)
2432 {
2433         struct cnic_local *cp = dev->cnic_priv;
2434         struct cnic_eth_dev *ethdev = cp->ethdev;
2435
2436         cnic_disable_bnx2_int_sync(dev);
2437
2438         cnic_reg_wr_ind(dev, BNX2_CP_SCRATCH + 0x20, 0);
2439         cnic_reg_wr_ind(dev, BNX2_COM_SCRATCH + 0x20, 0);
2440
2441         cnic_init_context(dev, KWQ_CID);
2442         cnic_init_context(dev, KCQ_CID);
2443
2444         cnic_setup_5709_context(dev, 0);
2445         cnic_free_irq(dev);
2446
2447         ethdev->drv_unregister_cnic(dev->netdev);
2448
2449         cnic_free_resc(dev);
2450 }
2451
2452 static void cnic_stop_hw(struct cnic_dev *dev)
2453 {
2454         if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2455                 struct cnic_local *cp = dev->cnic_priv;
2456
2457                 clear_bit(CNIC_F_CNIC_UP, &dev->flags);
2458                 rcu_assign_pointer(cp->ulp_ops[CNIC_ULP_L4], NULL);
2459                 synchronize_rcu();
2460                 cnic_cm_shutdown(dev);
2461                 cp->stop_hw(dev);
2462                 pci_dev_put(dev->pcidev);
2463         }
2464 }
2465
2466 static void cnic_free_dev(struct cnic_dev *dev)
2467 {
2468         int i = 0;
2469
2470         while ((atomic_read(&dev->ref_count) != 0) && i < 10) {
2471                 msleep(100);
2472                 i++;
2473         }
2474         if (atomic_read(&dev->ref_count) != 0)
2475                 printk(KERN_ERR PFX "%s: Failed waiting for ref count to go"
2476                                     " to zero.\n", dev->netdev->name);
2477
2478         printk(KERN_INFO PFX "Removed CNIC device: %s\n", dev->netdev->name);
2479         dev_put(dev->netdev);
2480         kfree(dev);
2481 }
2482
2483 static struct cnic_dev *cnic_alloc_dev(struct net_device *dev,
2484                                        struct pci_dev *pdev)
2485 {
2486         struct cnic_dev *cdev;
2487         struct cnic_local *cp;
2488         int alloc_size;
2489
2490         alloc_size = sizeof(struct cnic_dev) + sizeof(struct cnic_local);
2491
2492         cdev = kzalloc(alloc_size , GFP_KERNEL);
2493         if (cdev == NULL) {
2494                 printk(KERN_ERR PFX "%s: allocate dev struct failure\n",
2495                        dev->name);
2496                 return NULL;
2497         }
2498
2499         cdev->netdev = dev;
2500         cdev->cnic_priv = (char *)cdev + sizeof(struct cnic_dev);
2501         cdev->register_device = cnic_register_device;
2502         cdev->unregister_device = cnic_unregister_device;
2503         cdev->iscsi_nl_msg_recv = cnic_iscsi_nl_msg_recv;
2504
2505         cp = cdev->cnic_priv;
2506         cp->dev = cdev;
2507         cp->uio_dev = -1;
2508         cp->l2_single_buf_size = 0x400;
2509         cp->l2_rx_ring_size = 3;
2510
2511         spin_lock_init(&cp->cnic_ulp_lock);
2512
2513         printk(KERN_INFO PFX "Added CNIC device: %s\n", dev->name);
2514
2515         return cdev;
2516 }
2517
2518 static struct cnic_dev *init_bnx2_cnic(struct net_device *dev)
2519 {
2520         struct pci_dev *pdev;
2521         struct cnic_dev *cdev;
2522         struct cnic_local *cp;
2523         struct cnic_eth_dev *ethdev = NULL;
2524         struct cnic_eth_dev *(*probe)(void *) = NULL;
2525
2526         probe = __symbol_get("bnx2_cnic_probe");
2527         if (probe) {
2528                 ethdev = (*probe)(dev);
2529                 symbol_put_addr(probe);
2530         }
2531         if (!ethdev)
2532                 return NULL;
2533
2534         pdev = ethdev->pdev;
2535         if (!pdev)
2536                 return NULL;
2537
2538         dev_hold(dev);
2539         pci_dev_get(pdev);
2540         if (pdev->device == PCI_DEVICE_ID_NX2_5709 ||
2541             pdev->device == PCI_DEVICE_ID_NX2_5709S) {
2542                 u8 rev;
2543
2544                 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
2545                 if (rev < 0x10) {
2546                         pci_dev_put(pdev);
2547                         goto cnic_err;
2548                 }
2549         }
2550         pci_dev_put(pdev);
2551
2552         cdev = cnic_alloc_dev(dev, pdev);
2553         if (cdev == NULL)
2554                 goto cnic_err;
2555
2556         set_bit(CNIC_F_BNX2_CLASS, &cdev->flags);
2557         cdev->submit_kwqes = cnic_submit_bnx2_kwqes;
2558
2559         cp = cdev->cnic_priv;
2560         cp->ethdev = ethdev;
2561         cdev->pcidev = pdev;
2562
2563         cp->cnic_ops = &cnic_bnx2_ops;
2564         cp->start_hw = cnic_start_bnx2_hw;
2565         cp->stop_hw = cnic_stop_bnx2_hw;
2566         cp->setup_pgtbl = cnic_setup_page_tbl;
2567         cp->alloc_resc = cnic_alloc_bnx2_resc;
2568         cp->free_resc = cnic_free_resc;
2569         cp->start_cm = cnic_cm_init_bnx2_hw;
2570         cp->stop_cm = cnic_cm_stop_bnx2_hw;
2571         cp->enable_int = cnic_enable_bnx2_int;
2572         cp->disable_int_sync = cnic_disable_bnx2_int_sync;
2573         cp->close_conn = cnic_close_bnx2_conn;
2574         cp->next_idx = cnic_bnx2_next_idx;
2575         cp->hw_idx = cnic_bnx2_hw_idx;
2576         return cdev;
2577
2578 cnic_err:
2579         dev_put(dev);
2580         return NULL;
2581 }
2582
2583 static struct cnic_dev *is_cnic_dev(struct net_device *dev)
2584 {
2585         struct ethtool_drvinfo drvinfo;
2586         struct cnic_dev *cdev = NULL;
2587
2588         if (dev->ethtool_ops && dev->ethtool_ops->get_drvinfo) {
2589                 memset(&drvinfo, 0, sizeof(drvinfo));
2590                 dev->ethtool_ops->get_drvinfo(dev, &drvinfo);
2591
2592                 if (!strcmp(drvinfo.driver, "bnx2"))
2593                         cdev = init_bnx2_cnic(dev);
2594                 if (cdev) {
2595                         write_lock(&cnic_dev_lock);
2596                         list_add(&cdev->list, &cnic_dev_list);
2597                         write_unlock(&cnic_dev_lock);
2598                 }
2599         }
2600         return cdev;
2601 }
2602
2603 /**
2604  * netdev event handler
2605  */
2606 static int cnic_netdev_event(struct notifier_block *this, unsigned long event,
2607                                                          void *ptr)
2608 {
2609         struct net_device *netdev = ptr;
2610         struct cnic_dev *dev;
2611         int if_type;
2612         int new_dev = 0;
2613
2614         dev = cnic_from_netdev(netdev);
2615
2616         if (!dev && (event == NETDEV_REGISTER || event == NETDEV_UP)) {
2617                 /* Check for the hot-plug device */
2618                 dev = is_cnic_dev(netdev);
2619                 if (dev) {
2620                         new_dev = 1;
2621                         cnic_hold(dev);
2622                 }
2623         }
2624         if (dev) {
2625                 struct cnic_local *cp = dev->cnic_priv;
2626
2627                 if (new_dev)
2628                         cnic_ulp_init(dev);
2629                 else if (event == NETDEV_UNREGISTER)
2630                         cnic_ulp_exit(dev);
2631                 else if (event == NETDEV_UP) {
2632                         mutex_lock(&cnic_lock);
2633                         if (!cnic_start_hw(dev))
2634                                 cnic_ulp_start(dev);
2635                         mutex_unlock(&cnic_lock);
2636                 }
2637
2638                 rcu_read_lock();
2639                 for (if_type = 0; if_type < MAX_CNIC_ULP_TYPE; if_type++) {
2640                         struct cnic_ulp_ops *ulp_ops;
2641                         void *ctx;
2642
2643                         ulp_ops = rcu_dereference(cp->ulp_ops[if_type]);
2644                         if (!ulp_ops || !ulp_ops->indicate_netevent)
2645                                 continue;
2646
2647                         ctx = cp->ulp_handle[if_type];
2648
2649                         ulp_ops->indicate_netevent(ctx, event);
2650                 }
2651                 rcu_read_unlock();
2652
2653                 if (event == NETDEV_GOING_DOWN) {
2654                         mutex_lock(&cnic_lock);
2655                         cnic_ulp_stop(dev);
2656                         cnic_stop_hw(dev);
2657                         mutex_unlock(&cnic_lock);
2658                 } else if (event == NETDEV_UNREGISTER) {
2659                         write_lock(&cnic_dev_lock);
2660                         list_del_init(&dev->list);
2661                         write_unlock(&cnic_dev_lock);
2662
2663                         cnic_put(dev);
2664                         cnic_free_dev(dev);
2665                         goto done;
2666                 }
2667                 cnic_put(dev);
2668         }
2669 done:
2670         return NOTIFY_DONE;
2671 }
2672
2673 static struct notifier_block cnic_netdev_notifier = {
2674         .notifier_call = cnic_netdev_event
2675 };
2676
2677 static void cnic_release(void)
2678 {
2679         struct cnic_dev *dev;
2680
2681         while (!list_empty(&cnic_dev_list)) {
2682                 dev = list_entry(cnic_dev_list.next, struct cnic_dev, list);
2683                 if (test_bit(CNIC_F_CNIC_UP, &dev->flags)) {
2684                         cnic_ulp_stop(dev);
2685                         cnic_stop_hw(dev);
2686                 }
2687
2688                 cnic_ulp_exit(dev);
2689                 list_del_init(&dev->list);
2690                 cnic_free_dev(dev);
2691         }
2692 }
2693
2694 static int __init cnic_init(void)
2695 {
2696         int rc = 0;
2697
2698         printk(KERN_INFO "%s", version);
2699
2700         rc = register_netdevice_notifier(&cnic_netdev_notifier);
2701         if (rc) {
2702                 cnic_release();
2703                 return rc;
2704         }
2705
2706         return 0;
2707 }
2708
2709 static void __exit cnic_exit(void)
2710 {
2711         unregister_netdevice_notifier(&cnic_netdev_notifier);
2712         cnic_release();
2713         return;
2714 }
2715
2716 module_init(cnic_init);
2717 module_exit(cnic_exit);