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 = 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); 519