drivers/infiniband/hw/ocrdma/ocrdma_main.c

   1 /*******************************************************************
   2  * This file is part of the Emulex RoCE Device Driver for          *
   3  * RoCE (RDMA over Converged Ethernet) adapters.                   *
   4  * Copyright (C) 2008-2012 Emulex. All rights reserved.            *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  *                                                                 *
   8  * This program is free software; you can redistribute it and/or   *
   9  * modify it under the terms of version 2 of the GNU General       *
  10  * Public License as published by the Free Software Foundation.    *
  11  * This program is distributed in the hope that it will be useful. *
  12  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  13  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  14  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  15  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  16  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  17  * more details, a copy of which can be found in the file COPYING  *
  18  * included with this package.                                     *
  19  *
  20  * Contact Information:
  21  * linux-drivers@emulex.com
  22  *
  23  * Emulex
  24  * 3333 Susan Street
  25  * Costa Mesa, CA 92626
  26  *******************************************************************/
  27
  28 #include <linux/module.h>
  29 #include <linux/idr.h>
  30 #include <rdma/ib_verbs.h>
  31 #include <rdma/ib_user_verbs.h>
  32 #include <rdma/ib_addr.h>
  33
  34 #include <linux/netdevice.h>
  35 #include <net/addrconf.h>
  36
  37 #include "ocrdma.h"
  38 #include "ocrdma_verbs.h"
  39 #include "ocrdma_ah.h"
  40 #include "be_roce.h"
  41 #include "ocrdma_hw.h"
  42 #include "ocrdma_abi.h"
  43
  44 MODULE_VERSION(OCRDMA_ROCE_DEV_VERSION);
  45 MODULE_DESCRIPTION("Emulex RoCE HCA Driver");
  46 MODULE_AUTHOR("Emulex Corporation");
  47 MODULE_LICENSE("GPL");
  48
  49 static LIST_HEAD(ocrdma_dev_list);
  50 static DEFINE_SPINLOCK(ocrdma_devlist_lock);
  51 static DEFINE_IDR(ocrdma_dev_id);
  52
  53 static union ib_gid ocrdma_zero_sgid;
  54
  55 void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid)
  56 {
  57         u8 mac_addr[6];
  58
  59         memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
  60         guid[0] = mac_addr[0] ^ 2;
  61         guid[1] = mac_addr[1];
  62         guid[2] = mac_addr[2];
  63         guid[3] = 0xff;
  64         guid[4] = 0xfe;
  65         guid[5] = mac_addr[3];
  66         guid[6] = mac_addr[4];
  67         guid[7] = mac_addr[5];
  68 }
  69
  70 static bool ocrdma_add_sgid(struct ocrdma_dev *dev, union ib_gid *new_sgid)
  71 {
  72         int i;
  73         unsigned long flags;
  74
  75         memset(&ocrdma_zero_sgid, 0, sizeof(union ib_gid));
  76
  77
  78         spin_lock_irqsave(&dev->sgid_lock, flags);
  79         for (i = 0; i < OCRDMA_MAX_SGID; i++) {
  80                 if (!memcmp(&dev->sgid_tbl[i], &ocrdma_zero_sgid,
  81                             sizeof(union ib_gid))) {
  82                         /* found free entry */
  83                         memcpy(&dev->sgid_tbl[i], new_sgid,
  84                                sizeof(union ib_gid));
  85                         spin_unlock_irqrestore(&dev->sgid_lock, flags);
  86                         return true;
  87                 } else if (!memcmp(&dev->sgid_tbl[i], new_sgid,
  88                                    sizeof(union ib_gid))) {
  89                         /* entry already present, no addition is required. */
  90                         spin_unlock_irqrestore(&dev->sgid_lock, flags);
  91                         return false;
  92                 }
  93         }
  94         spin_unlock_irqrestore(&dev->sgid_lock, flags);
  95         return false;
  96 }
  97
  98 static bool ocrdma_del_sgid(struct ocrdma_dev *dev, union ib_gid *sgid)
  99 {
 100         int found = false;
 101         int i;
 102         unsigned long flags;
 103
 104
 105         spin_lock_irqsave(&dev->sgid_lock, flags);
 106         /* first is default sgid, which cannot be deleted. */
 107         for (i = 1; i < OCRDMA_MAX_SGID; i++) {
 108                 if (!memcmp(&dev->sgid_tbl[i], sgid, sizeof(union ib_gid))) {
 109                         /* found matching entry */
 110                         memset(&dev->sgid_tbl[i], 0, sizeof(union ib_gid));
 111                         found = true;
 112                         break;
 113                 }
 114         }
 115         spin_unlock_irqrestore(&dev->sgid_lock, flags);
 116         return found;
 117 }
 118
 119 static int ocrdma_addr_event(unsigned long event, struct net_device *netdev,
 120                              union ib_gid *gid)
 121 {
 122         struct ib_event gid_event;
 123         struct ocrdma_dev *dev;
 124         bool found = false;
 125         bool updated = false;
 126         bool is_vlan = false;
 127
 128         is_vlan = netdev->priv_flags & IFF_802_1Q_VLAN;
 129         if (is_vlan)
 130                 netdev = rdma_vlan_dev_real_dev(netdev);
 131
 132         rcu_read_lock();
 133         list_for_each_entry_rcu(dev, &ocrdma_dev_list, entry) {
 134                 if (dev->nic_info.netdev == netdev) {
 135                         found = true;
 136                         break;
 137                 }
 138         }
 139         rcu_read_unlock();
 140
 141         if (!found)
 142                 return NOTIFY_DONE;
 143
 144         mutex_lock(&dev->dev_lock);
 145         switch (event) {
 146         case NETDEV_UP:
 147                 updated = ocrdma_add_sgid(dev, gid);
 148                 break;
 149         case NETDEV_DOWN:
 150                 updated = ocrdma_del_sgid(dev, gid);
 151                 break;
 152         default:
 153                 break;
 154         }
 155         if (updated) {
 156                 /* GID table updated, notify the consumers about it */
 157                 gid_event.device = &dev->ibdev;
 158                 gid_event.element.port_num = 1;
 159                 gid_event.event = IB_EVENT_GID_CHANGE;
 160                 ib_dispatch_event(&gid_event);
 161         }
 162         mutex_unlock(&dev->dev_lock);
 163         return NOTIFY_OK;
 164 }
 165
 166 static int ocrdma_inetaddr_event(struct notifier_block *notifier,
 167                                   unsigned long event, void *ptr)
 168 {
 169         struct in_ifaddr *ifa = ptr;
 170         union ib_gid gid;
 171         struct net_device *netdev = ifa->ifa_dev->dev;
 172
 173         ipv6_addr_set_v4mapped(ifa->ifa_address, (struct in6_addr *)&gid);
 174         return ocrdma_addr_event(event, netdev, &gid);
 175 }
 176
 177 static struct notifier_block ocrdma_inetaddr_notifier = {
 178         .notifier_call = ocrdma_inetaddr_event
 179 };
 180
 181 #if IS_ENABLED(CONFIG_IPV6)
 182
 183 static int ocrdma_inet6addr_event(struct notifier_block *notifier,
 184                                   unsigned long event, void *ptr)
 185 {
 186         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
 187         union  ib_gid *gid = (union ib_gid *)&ifa->addr;
 188         struct net_device *netdev = ifa->idev->dev;
 189         return ocrdma_addr_event(event, netdev, gid);
 190 }
 191
 192 static struct notifier_block ocrdma_inet6addr_notifier = {
 193         .notifier_call = ocrdma_inet6addr_event
 194 };
 195
 196 #endif /* IPV6 and VLAN */
 197
 198 static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
 199                                               u8 port_num)
 200 {
 201         return IB_LINK_LAYER_ETHERNET;
 202 }
 203
 204 static int ocrdma_register_device(struct ocrdma_dev *dev)
 205 {
 206         strlcpy(dev->ibdev.name, "ocrdma%d", IB_DEVICE_NAME_MAX);
 207         ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid);
 208         memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
 209                sizeof(OCRDMA_NODE_DESC));
 210         dev->ibdev.owner = THIS_MODULE;
 211         dev->ibdev.uverbs_abi_ver = OCRDMA_ABI_VERSION;
 212         dev->ibdev.uverbs_cmd_mask =
 213             OCRDMA_UVERBS(GET_CONTEXT) |
 214             OCRDMA_UVERBS(QUERY_DEVICE) |
 215             OCRDMA_UVERBS(QUERY_PORT) |
 216             OCRDMA_UVERBS(ALLOC_PD) |
 217             OCRDMA_UVERBS(DEALLOC_PD) |
 218             OCRDMA_UVERBS(REG_MR) |
 219             OCRDMA_UVERBS(DEREG_MR) |
 220             OCRDMA_UVERBS(CREATE_COMP_CHANNEL) |
 221             OCRDMA_UVERBS(CREATE_CQ) |
 222             OCRDMA_UVERBS(RESIZE_CQ) |
 223             OCRDMA_UVERBS(DESTROY_CQ) |
 224             OCRDMA_UVERBS(REQ_NOTIFY_CQ) |
 225             OCRDMA_UVERBS(CREATE_QP) |
 226             OCRDMA_UVERBS(MODIFY_QP) |
 227             OCRDMA_UVERBS(QUERY_QP) |
 228             OCRDMA_UVERBS(DESTROY_QP) |
 229             OCRDMA_UVERBS(POLL_CQ) |
 230             OCRDMA_UVERBS(POST_SEND) |
 231             OCRDMA_UVERBS(POST_RECV);
 232
 233         dev->ibdev.uverbs_cmd_mask |=
 234             OCRDMA_UVERBS(CREATE_AH) |
 235              OCRDMA_UVERBS(MODIFY_AH) |
 236              OCRDMA_UVERBS(QUERY_AH) |
 237              OCRDMA_UVERBS(DESTROY_AH);
 238
 239         dev->ibdev.node_type = RDMA_NODE_IB_CA;
 240         dev->ibdev.phys_port_cnt = 1;
 241         dev->ibdev.num_comp_vectors = 1;
 242
 243         /* mandatory verbs. */
 244         dev->ibdev.query_device = ocrdma_query_device;
 245         dev->ibdev.query_port = ocrdma_query_port;
 246         dev->ibdev.modify_port = ocrdma_modify_port;
 247         dev->ibdev.query_gid = ocrdma_query_gid;
 248         dev->ibdev.get_link_layer = ocrdma_link_layer;
 249         dev->ibdev.alloc_pd = ocrdma_alloc_pd;
 250         dev->ibdev.dealloc_pd = ocrdma_dealloc_pd;
 251
 252         dev->ibdev.create_cq = ocrdma_create_cq;
 253         dev->ibdev.destroy_cq = ocrdma_destroy_cq;
 254         dev->ibdev.resize_cq = ocrdma_resize_cq;
 255
 256         dev->ibdev.create_qp = ocrdma_create_qp;
 257         dev->ibdev.modify_qp = ocrdma_modify_qp;
 258         dev->ibdev.query_qp = ocrdma_query_qp;
 259         dev->ibdev.destroy_qp = ocrdma_destroy_qp;
 260
 261         dev->ibdev.query_pkey = ocrdma_query_pkey;
 262         dev->ibdev.create_ah = ocrdma_create_ah;
 263         dev->ibdev.destroy_ah = ocrdma_destroy_ah;
 264         dev->ibdev.query_ah = ocrdma_query_ah;
 265         dev->ibdev.modify_ah = ocrdma_modify_ah;
 266
 267         dev->ibdev.poll_cq = ocrdma_poll_cq;
 268         dev->ibdev.post_send = ocrdma_post_send;
 269         dev->ibdev.post_recv = ocrdma_post_recv;
 270         dev->ibdev.req_notify_cq = ocrdma_arm_cq;
 271
 272         dev->ibdev.get_dma_mr = ocrdma_get_dma_mr;
 273         dev->ibdev.reg_phys_mr = ocrdma_reg_kernel_mr;
 274         dev->ibdev.dereg_mr = ocrdma_dereg_mr;
 275         dev->ibdev.reg_user_mr = ocrdma_reg_user_mr;
 276
 277         dev->ibdev.alloc_fast_reg_mr = ocrdma_alloc_frmr;
 278         dev->ibdev.alloc_fast_reg_page_list = ocrdma_alloc_frmr_page_list;
 279         dev->ibdev.free_fast_reg_page_list = ocrdma_free_frmr_page_list;
 280
 281         /* mandatory to support user space verbs consumer. */
 282         dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext;
 283         dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext;
 284         dev->ibdev.mmap = ocrdma_mmap;
 285         dev->ibdev.dma_device = &dev->nic_info.pdev->dev;
 286
 287         dev->ibdev.process_mad = ocrdma_process_mad;
 288
 289         if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
 290                 dev->ibdev.uverbs_cmd_mask |=
 291                      OCRDMA_UVERBS(CREATE_SRQ) |
 292                      OCRDMA_UVERBS(MODIFY_SRQ) |
 293                      OCRDMA_UVERBS(QUERY_SRQ) |
 294                      OCRDMA_UVERBS(DESTROY_SRQ) |
 295                      OCRDMA_UVERBS(POST_SRQ_RECV);
 296
 297                 dev->ibdev.create_srq = ocrdma_create_srq;
 298                 dev->ibdev.modify_srq = ocrdma_modify_srq;
 299                 dev->ibdev.query_srq = ocrdma_query_srq;
 300                 dev->ibdev.destroy_srq = ocrdma_destroy_srq;
 301                 dev->ibdev.post_srq_recv = ocrdma_post_srq_recv;
 302         }
 303         return ib_register_device(&dev->ibdev, NULL);
 304 }
 305
 306 static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
 307 {
 308         mutex_init(&dev->dev_lock);
 309         dev->sgid_tbl = kzalloc(sizeof(union ib_gid) *
 310                                 OCRDMA_MAX_SGID, GFP_KERNEL);
 311         if (!dev->sgid_tbl)
 312                 goto alloc_err;
 313         spin_lock_init(&dev->sgid_lock);
 314
 315         dev->cq_tbl = kzalloc(sizeof(struct ocrdma_cq *) *
 316                               OCRDMA_MAX_CQ, GFP_KERNEL);
 317         if (!dev->cq_tbl)
 318                 goto alloc_err;
 319
 320         if (dev->attr.max_qp) {
 321                 dev->qp_tbl = kzalloc(sizeof(struct ocrdma_qp *) *
 322                                       OCRDMA_MAX_QP, GFP_KERNEL);
 323                 if (!dev->qp_tbl)
 324                         goto alloc_err;
 325         }
 326         spin_lock_init(&dev->av_tbl.lock);
 327         spin_lock_init(&dev->flush_q_lock);
 328         return 0;
 329 alloc_err:
 330         pr_err("%s(%d) error.\n", __func__, dev->id);
 331         return -ENOMEM;
 332 }
 333
 334 static void ocrdma_free_resources(struct ocrdma_dev *dev)
 335 {
 336         kfree(dev->qp_tbl);
 337         kfree(dev->cq_tbl);
 338         kfree(dev->sgid_tbl);
 339 }
 340
 341 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
 342 {
 343         int status = 0;
 344         struct ocrdma_dev *dev;
 345
 346         dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev));
 347         if (!dev) {
 348                 pr_err("Unable to allocate ib device\n");
 349                 return NULL;
 350         }
 351         dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
 352         if (!dev->mbx_cmd)
 353                 goto idr_err;
 354
 355         memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
 356         dev->id = idr_alloc(&ocrdma_dev_id, NULL, 0, 0, GFP_KERNEL);
 357         if (dev->id < 0)
 358                 goto idr_err;
 359
 360         status = ocrdma_init_hw(dev);
 361         if (status)
 362                 goto init_err;
 363
 364         status = ocrdma_alloc_resources(dev);
 365         if (status)
 366                 goto alloc_err;
 367
 368         status = ocrdma_register_device(dev);
 369         if (status)
 370                 goto alloc_err;
 371
 372         spin_lock(&ocrdma_devlist_lock);
 373         list_add_tail_rcu(&dev->entry, &ocrdma_dev_list);
 374         spin_unlock(&ocrdma_devlist_lock);
 375         return dev;
 376
 377 alloc_err:
 378         ocrdma_free_resources(dev);
 379         ocrdma_cleanup_hw(dev);
 380 init_err:
 381         idr_remove(&ocrdma_dev_id, dev->id);
 382 idr_err:
 383         kfree(dev->mbx_cmd);
 384         ib_dealloc_device(&dev->ibdev);
 385         pr_err("%s() leaving. ret=%d\n", __func__, status);
 386         return NULL;
 387 }
 388
 389 static void ocrdma_remove_free(struct rcu_head *rcu)
 390 {
 391         struct ocrdma_dev *dev = container_of(rcu, struct ocrdma_dev, rcu);
 392
 393         idr_remove(&ocrdma_dev_id, dev->id);
 394         kfree(dev->mbx_cmd);
 395         ib_dealloc_device(&dev->ibdev);
 396 }
 397
 398 static void ocrdma_remove(struct ocrdma_dev *dev)
 399 {
 400         /* first unregister with stack to stop all the active traffic
 401          * of the registered clients.
 402          */
 403         ib_unregister_device(&dev->ibdev);
 404
 405         spin_lock(&ocrdma_devlist_lock);
 406         list_del_rcu(&dev->entry);
 407         spin_unlock(&ocrdma_devlist_lock);
 408
 409         ocrdma_free_resources(dev);
 410         ocrdma_cleanup_hw(dev);
 411
 412         call_rcu(&dev->rcu, ocrdma_remove_free);
 413 }
 414
 415 static int ocrdma_open(struct ocrdma_dev *dev)
 416 {
 417         struct ib_event port_event;
 418
 419         port_event.event = IB_EVENT_PORT_ACTIVE;
 420         port_event.element.port_num = 1;
 421         port_event.device = &dev->ibdev;
 422         ib_dispatch_event(&port_event);
 423         return 0;
 424 }
 425
 426 static int ocrdma_close(struct ocrdma_dev *dev)
 427 {
 428         int i;
 429         struct ocrdma_qp *qp, **cur_qp;
 430         struct ib_event err_event;
 431         struct ib_qp_attr attrs;
 432         int attr_mask = IB_QP_STATE;
 433
 434         attrs.qp_state = IB_QPS_ERR;
 435         mutex_lock(&dev->dev_lock);
 436         if (dev->qp_tbl) {
 437                 cur_qp = dev->qp_tbl;
 438                 for (i = 0; i < OCRDMA_MAX_QP; i++) {
 439                         qp = cur_qp[i];
 440                         if (qp) {
 441                                 /* change the QP state to ERROR */
 442                                 _ocrdma_modify_qp(&qp->ibqp, &attrs, attr_mask);
 443
 444                                 err_event.event = IB_EVENT_QP_FATAL;
 445                                 err_event.element.qp = &qp->ibqp;
 446                                 err_event.device = &dev->ibdev;
 447                                 ib_dispatch_event(&err_event);
 448                         }
 449                 }
 450         }
 451         mutex_unlock(&dev->dev_lock);
 452
 453         err_event.event = IB_EVENT_PORT_ERR;
 454         err_event.element.port_num = 1;
 455         err_event.device = &dev->ibdev;
 456         ib_dispatch_event(&err_event);
 457         return 0;
 458 }
 459
 460 /* event handling via NIC driver ensures that all the NIC specific
 461  * initialization done before RoCE driver notifies
 462  * event to stack.
 463  */
 464 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
 465 {
 466         switch (event) {
 467         case BE_DEV_UP:
 468                 ocrdma_open(dev);
 469                 break;
 470         case BE_DEV_DOWN:
 471                 ocrdma_close(dev);
 472                 break;
 473         }
 474 }
 475
 476 static struct ocrdma_driver ocrdma_drv = {
 477         .name                   = "ocrdma_driver",
 478         .add                    = ocrdma_add,
 479         .remove                 = ocrdma_remove,
 480         .state_change_handler   = ocrdma_event_handler,
 481 };
 482
 483 static void ocrdma_unregister_inet6addr_notifier(void)
 484 {
 485 #if IS_ENABLED(CONFIG_IPV6)
 486         unregister_inet6addr_notifier(&ocrdma_inet6addr_notifier);
 487 #endif
 488 }
 489
 490 static int __init ocrdma_init_module(void)
 491 {
 492         int status;
 493
 494         status = register_inetaddr_notifier(&ocrdma_inetaddr_notifier);
 495         if (status)
 496                 return status;
 497
 498 #if IS_ENABLED(CONFIG_IPV6)
 499         status = register_inet6addr_notifier(&ocrdma_inet6addr_notifier);
 500         if (status)
 501                 return status;
 502 #endif
 503
 504         status = be_roce_register_driver(&ocrdma_drv);
 505         if (status)
 506                 ocrdma_unregister_inet6addr_notifier();
 507
 508         return status;
 509 }
 510
 511 static void __exit ocrdma_exit_module(void)
 512 {
 513         be_roce_unregister_driver(&ocrdma_drv);
 514         ocrdma_unregister_inet6addr_notifier();
 515 }
 516
 517 module_init(ocrdma_init_module);
 518 module_exit(ocrdma_exit_module);