1 /* This file is part of the Emulex RoCE Device Driver for 2 * RoCE (RDMA over Converged Ethernet) adapters. 3 * Copyright (C) 2012-2015 Emulex. All rights reserved. 4 * EMULEX and SLI are trademarks of Emulex. 5 * www.emulex.com 6 * 7 * This software is available to you under a choice of one of two licenses. 8 * You may choose to be licensed under the terms of the GNU General Public 9 * License (GPL) Version 2, available from the file COPYING in the main 10 * directory of this source tree, or the BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * - Redistributions of source code must retain the above copyright notice, 17 * this list of conditions and the following disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in 21 * the documentation and/or other materials provided with the distribution. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 24 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 * 35 * Contact Information: 36 * linux-drivers@emulex.com 37 * 38 * Emulex 39 * 3333 Susan Street 40 * Costa Mesa, CA 92626 41 */ 42 43 #include <linux/module.h> 44 #include <linux/idr.h> 45 #include <rdma/ib_verbs.h> 46 #include <rdma/ib_user_verbs.h> 47 #include <rdma/ib_addr.h> 48 #include <rdma/ib_mad.h> 49 50 #include <linux/netdevice.h> 51 #include <net/addrconf.h> 52 53 #include "ocrdma.h" 54 #include "ocrdma_verbs.h" 55 #include "ocrdma_ah.h" 56 #include "be_roce.h" 57 #include "ocrdma_hw.h" 58 #include "ocrdma_stats.h" 59 #include "ocrdma_abi.h" 60 61 MODULE_VERSION(OCRDMA_ROCE_DRV_VERSION); 62 MODULE_DESCRIPTION(OCRDMA_ROCE_DRV_DESC " " OCRDMA_ROCE_DRV_VERSION); 63 MODULE_AUTHOR("Emulex Corporation"); 64 MODULE_LICENSE("Dual BSD/GPL"); 65 66 static LIST_HEAD(ocrdma_dev_list); 67 static DEFINE_SPINLOCK(ocrdma_devlist_lock); 68 static DEFINE_IDR(ocrdma_dev_id); 69 70 void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid) 71 { 72 u8 mac_addr[6]; 73 74 memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN); 75 guid[0] = mac_addr[0] ^ 2; 76 guid[1] = mac_addr[1]; 77 guid[2] = mac_addr[2]; 78 guid[3] = 0xff; 79 guid[4] = 0xfe; 80 guid[5] = mac_addr[3]; 81 guid[6] = mac_addr[4]; 82 guid[7] = mac_addr[5]; 83 } 84 static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device, 85 u8 port_num) 86 { 87 return IB_LINK_LAYER_ETHERNET; 88 } 89 90 static int ocrdma_port_immutable(struct ib_device *ibdev, u8 port_num, 91 struct ib_port_immutable *immutable) 92 { 93 struct ib_port_attr attr; 94 int err; 95 96 err = ocrdma_query_port(ibdev, port_num, &attr); 97 if (err) 98 return err; 99 100 immutable->pkey_tbl_len = attr.pkey_tbl_len; 101 immutable->gid_tbl_len = attr.gid_tbl_len; 102 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE; 103 immutable->max_mad_size = IB_MGMT_MAD_SIZE; 104 105 return 0; 106 } 107 108 static int ocrdma_register_device(struct ocrdma_dev *dev) 109 { 110 strlcpy(dev->ibdev.name, "ocrdma%d", IB_DEVICE_NAME_MAX); 111 ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid); 112 memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC, 113 sizeof(OCRDMA_NODE_DESC)); 114 dev->ibdev.owner = THIS_MODULE; 115 dev->ibdev.uverbs_abi_ver = OCRDMA_ABI_VERSION; 116 dev->ibdev.uverbs_cmd_mask = 117 OCRDMA_UVERBS(GET_CONTEXT) | 118 OCRDMA_UVERBS(QUERY_DEVICE) | 119 OCRDMA_UVERBS(QUERY_PORT) | 120 OCRDMA_UVERBS(ALLOC_PD) | 121 OCRDMA_UVERBS(DEALLOC_PD) | 122 OCRDMA_UVERBS(REG_MR) | 123 OCRDMA_UVERBS(DEREG_MR) | 124 OCRDMA_UVERBS(CREATE_COMP_CHANNEL) | 125 OCRDMA_UVERBS(CREATE_CQ) | 126 OCRDMA_UVERBS(RESIZE_CQ) | 127 OCRDMA_UVERBS(DESTROY_CQ) | 128 OCRDMA_UVERBS(REQ_NOTIFY_CQ) | 129 OCRDMA_UVERBS(CREATE_QP) | 130 OCRDMA_UVERBS(MODIFY_QP) | 131 OCRDMA_UVERBS(QUERY_QP) | 132 OCRDMA_UVERBS(DESTROY_QP) | 133 OCRDMA_UVERBS(POLL_CQ) | 134 OCRDMA_UVERBS(POST_SEND) | 135 OCRDMA_UVERBS(POST_RECV); 136 137 dev->ibdev.uverbs_cmd_mask |= 138 OCRDMA_UVERBS(CREATE_AH) | 139 OCRDMA_UVERBS(MODIFY_AH) | 140 OCRDMA_UVERBS(QUERY_AH) | 141 OCRDMA_UVERBS(DESTROY_AH); 142 143 dev->ibdev.node_type = RDMA_NODE_IB_CA; 144 dev->ibdev.phys_port_cnt = 1; 145 dev->ibdev.num_comp_vectors = dev->eq_cnt; 146 147 /* mandatory verbs. */ 148 dev->ibdev.query_device = ocrdma_query_device; 149 dev->ibdev.query_port = ocrdma_query_port; 150 dev->ibdev.modify_port = ocrdma_modify_port; 151 dev->ibdev.query_gid = ocrdma_query_gid; 152 dev->ibdev.get_netdev = ocrdma_get_netdev; 153 dev->ibdev.add_gid = ocrdma_add_gid; 154 dev->ibdev.del_gid = ocrdma_del_gid; 155 dev->ibdev.get_link_layer = ocrdma_link_layer; 156 dev->ibdev.alloc_pd = ocrdma_alloc_pd; 157 dev->ibdev.dealloc_pd = ocrdma_dealloc_pd; 158 159 dev->ibdev.create_cq = ocrdma_create_cq; 160 dev->ibdev.destroy_cq = ocrdma_destroy_cq; 161 dev->ibdev.resize_cq = ocrdma_resize_cq; 162 163 dev->ibdev.create_qp = ocrdma_create_qp; 164 dev->ibdev.modify_qp = ocrdma_modify_qp; 165 dev->ibdev.query_qp = ocrdma_query_qp; 166 dev->ibdev.destroy_qp = ocrdma_destroy_qp; 167 168 dev->ibdev.query_pkey = ocrdma_query_pkey; 169 dev->ibdev.create_ah = ocrdma_create_ah; 170 dev->ibdev.destroy_ah = ocrdma_destroy_ah; 171 dev->ibdev.query_ah = ocrdma_query_ah; 172 dev->ibdev.modify_ah = ocrdma_modify_ah; 173 174 dev->ibdev.poll_cq = ocrdma_poll_cq; 175 dev->ibdev.post_send = ocrdma_post_send; 176 dev->ibdev.post_recv = ocrdma_post_recv; 177 dev->ibdev.req_notify_cq = ocrdma_arm_cq; 178 179 dev->ibdev.get_dma_mr = ocrdma_get_dma_mr; 180 dev->ibdev.reg_phys_mr = ocrdma_reg_kernel_mr; 181 dev->ibdev.dereg_mr = ocrdma_dereg_mr; 182 dev->ibdev.reg_user_mr = ocrdma_reg_user_mr; 183 184 dev->ibdev.alloc_mr = ocrdma_alloc_mr; 185 dev->ibdev.alloc_fast_reg_page_list = ocrdma_alloc_frmr_page_list; 186 dev->ibdev.free_fast_reg_page_list = ocrdma_free_frmr_page_list; 187 188 /* mandatory to support user space verbs consumer. */ 189 dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext; 190 dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext; 191 dev->ibdev.mmap = ocrdma_mmap; 192 dev->ibdev.dma_device = &dev->nic_info.pdev->dev; 193 194 dev->ibdev.process_mad = ocrdma_process_mad; 195 dev->ibdev.get_port_immutable = ocrdma_port_immutable; 196 197 if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) { 198 dev->ibdev.uverbs_cmd_mask |= 199 OCRDMA_UVERBS(CREATE_SRQ) | 200 OCRDMA_UVERBS(MODIFY_SRQ) | 201 OCRDMA_UVERBS(QUERY_SRQ) | 202 OCRDMA_UVERBS(DESTROY_SRQ) | 203 OCRDMA_UVERBS(POST_SRQ_RECV); 204 205 dev->ibdev.create_srq = ocrdma_create_srq; 206 dev->ibdev.modify_srq = ocrdma_modify_srq; 207 dev->ibdev.query_srq = ocrdma_query_srq; 208 dev->ibdev.destroy_srq = ocrdma_destroy_srq; 209 dev->ibdev.post_srq_recv = ocrdma_post_srq_recv; 210 } 211 return ib_register_device(&dev->ibdev, NULL); 212 } 213 214 static int ocrdma_alloc_resources(struct ocrdma_dev *dev) 215 { 216 mutex_init(&dev->dev_lock); 217 dev->cq_tbl = kzalloc(sizeof(struct ocrdma_cq *) * 218 OCRDMA_MAX_CQ, GFP_KERNEL); 219 if (!dev->cq_tbl) 220 goto alloc_err; 221 222 if (dev->attr.max_qp) { 223 dev->qp_tbl = kzalloc(sizeof(struct ocrdma_qp *) * 224 OCRDMA_MAX_QP, GFP_KERNEL); 225 if (!dev->qp_tbl) 226 goto alloc_err; 227 } 228 229 dev->stag_arr = kzalloc(sizeof(u64) * OCRDMA_MAX_STAG, GFP_KERNEL); 230 if (dev->stag_arr == NULL) 231 goto alloc_err; 232 233 ocrdma_alloc_pd_pool(dev); 234 235 spin_lock_init(&dev->av_tbl.lock); 236 spin_lock_init(&dev->flush_q_lock); 237 return 0; 238 alloc_err: 239 pr_err("%s(%d) error.\n", __func__, dev->id); 240 return -ENOMEM; 241 } 242 243 static void ocrdma_free_resources(struct ocrdma_dev *dev) 244 { 245 kfree(dev->stag_arr); 246 kfree(dev->qp_tbl); 247 kfree(dev->cq_tbl); 248 } 249 250 /* OCRDMA sysfs interface */ 251 static ssize_t show_rev(struct device *device, struct device_attribute *attr, 252 char *buf) 253 { 254 struct ocrdma_dev *dev = dev_get_drvdata(device); 255 256 return scnprintf(buf, PAGE_SIZE, "0x%x\n", dev->nic_info.pdev->vendor); 257 } 258 259 static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr, 260 char *buf) 261 { 262 struct ocrdma_dev *dev = dev_get_drvdata(device); 263 264 return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->attr.fw_ver[0]); 265 } 266 267 static ssize_t show_hca_type(struct device *device, 268 struct device_attribute *attr, char *buf) 269 { 270 struct ocrdma_dev *dev = dev_get_drvdata(device); 271 272 return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->model_number[0]); 273 } 274 275 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL); 276 static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL); 277 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca_type, NULL); 278 279 static struct device_attribute *ocrdma_attributes[] = { 280 &dev_attr_hw_rev, 281 &dev_attr_fw_ver, 282 &dev_attr_hca_type 283 }; 284 285 static void ocrdma_remove_sysfiles(struct ocrdma_dev *dev) 286 { 287 int i; 288 289 for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++) 290 device_remove_file(&dev->ibdev.dev, ocrdma_attributes[i]); 291 } 292 293 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info) 294 { 295 int status = 0, i; 296 struct ocrdma_dev *dev; 297 298 dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev)); 299 if (!dev) { 300 pr_err("Unable to allocate ib device\n"); 301 return NULL; 302 } 303 dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL); 304 if (!dev->mbx_cmd) 305 goto idr_err; 306 307 memcpy(&dev->nic_info, dev_info, sizeof(*dev_info)); 308 dev->id = idr_alloc(&ocrdma_dev_id, NULL, 0, 0, GFP_KERNEL); 309 if (dev->id < 0) 310 goto idr_err; 311 312 status = ocrdma_init_hw(dev); 313 if (status) 314 goto init_err; 315 316 status = ocrdma_alloc_resources(dev); 317 if (status) 318 goto alloc_err; 319 320 ocrdma_init_service_level(dev); 321 status = ocrdma_register_device(dev); 322 if (status) 323 goto alloc_err; 324 325 for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++) 326 if (device_create_file(&dev->ibdev.dev, ocrdma_attributes[i])) 327 goto sysfs_err; 328 spin_lock(&ocrdma_devlist_lock); 329 list_add_tail_rcu(&dev->entry, &ocrdma_dev_list); 330 spin_unlock(&ocrdma_devlist_lock); 331 /* Init stats */ 332 ocrdma_add_port_stats(dev); 333 /* Interrupt Moderation */ 334 INIT_DELAYED_WORK(&dev->eqd_work, ocrdma_eqd_set_task); 335 schedule_delayed_work(&dev->eqd_work, msecs_to_jiffies(1000)); 336 337 pr_info("%s %s: %s \"%s\" port %d\n", 338 dev_name(&dev->nic_info.pdev->dev), hca_name(dev), 339 port_speed_string(dev), dev->model_number, 340 dev->hba_port_num); 341 pr_info("%s ocrdma%d driver loaded successfully\n", 342 dev_name(&dev->nic_info.pdev->dev), dev->id); 343 return dev; 344 345 sysfs_err: 346 ocrdma_remove_sysfiles(dev); 347 alloc_err: 348 ocrdma_free_resources(dev); 349 ocrdma_cleanup_hw(dev); 350 init_err: 351 idr_remove(&ocrdma_dev_id, dev->id); 352 idr_err: 353 kfree(dev->mbx_cmd); 354 ib_dealloc_device(&dev->ibdev); 355 pr_err("%s() leaving. ret=%d\n", __func__, status); 356 return NULL; 357 } 358 359 static void ocrdma_remove_free(struct rcu_head *rcu) 360 { 361 struct ocrdma_dev *dev = container_of(rcu, struct ocrdma_dev, rcu); 362 363 idr_remove(&ocrdma_dev_id, dev->id); 364 kfree(dev->mbx_cmd); 365 ib_dealloc_device(&dev->ibdev); 366 } 367 368 static void ocrdma_remove(struct ocrdma_dev *dev) 369 { 370 /* first unregister with stack to stop all the active traffic 371 * of the registered clients. 372 */ 373 cancel_delayed_work_sync(&dev->eqd_work); 374 ocrdma_remove_sysfiles(dev); 375 ib_unregister_device(&dev->ibdev); 376 377 ocrdma_rem_port_stats(dev); 378 379 spin_lock(&ocrdma_devlist_lock); 380 list_del_rcu(&dev->entry); 381 spin_unlock(&ocrdma_devlist_lock); 382 383 ocrdma_free_resources(dev); 384 ocrdma_cleanup_hw(dev); 385 386 call_rcu(&dev->rcu, ocrdma_remove_free); 387 } 388 389 static int ocrdma_open(struct ocrdma_dev *dev) 390 { 391 struct ib_event port_event; 392 393 port_event.event = IB_EVENT_PORT_ACTIVE; 394 port_event.element.port_num = 1; 395 port_event.device = &dev->ibdev; 396 ib_dispatch_event(&port_event); 397 return 0; 398 } 399 400 static int ocrdma_close(struct ocrdma_dev *dev) 401 { 402 int i; 403 struct ocrdma_qp *qp, **cur_qp; 404 struct ib_event err_event; 405 struct ib_qp_attr attrs; 406 int attr_mask = IB_QP_STATE; 407 408 attrs.qp_state = IB_QPS_ERR; 409 mutex_lock(&dev->dev_lock); 410 if (dev->qp_tbl) { 411 cur_qp = dev->qp_tbl; 412 for (i = 0; i < OCRDMA_MAX_QP; i++) { 413 qp = cur_qp[i]; 414 if (qp && qp->ibqp.qp_type != IB_QPT_GSI) { 415 /* change the QP state to ERROR */ 416 _ocrdma_modify_qp(&qp->ibqp, &attrs, attr_mask); 417 418 err_event.event = IB_EVENT_QP_FATAL; 419 err_event.element.qp = &qp->ibqp; 420 err_event.device = &dev->ibdev; 421 ib_dispatch_event(&err_event); 422 } 423 } 424 } 425 mutex_unlock(&dev->dev_lock); 426 427 err_event.event = IB_EVENT_PORT_ERR; 428 err_event.element.port_num = 1; 429 err_event.device = &dev->ibdev; 430 ib_dispatch_event(&err_event); 431 return 0; 432 } 433 434 static void ocrdma_shutdown(struct ocrdma_dev *dev) 435 { 436 ocrdma_close(dev); 437 ocrdma_remove(dev); 438 } 439 440 /* event handling via NIC driver ensures that all the NIC specific 441 * initialization done before RoCE driver notifies 442 * event to stack. 443 */ 444 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event) 445 { 446 switch (event) { 447 case BE_DEV_UP: 448 ocrdma_open(dev); 449 break; 450 case BE_DEV_DOWN: 451 ocrdma_close(dev); 452 break; 453 case BE_DEV_SHUTDOWN: 454 ocrdma_shutdown(dev); 455 break; 456 } 457 } 458 459 static struct ocrdma_driver ocrdma_drv = { 460 .name = "ocrdma_driver", 461 .add = ocrdma_add, 462 .remove = ocrdma_remove, 463 .state_change_handler = ocrdma_event_handler, 464 .be_abi_version = OCRDMA_BE_ROCE_ABI_VERSION, 465 }; 466 467 static int __init ocrdma_init_module(void) 468 { 469 int status; 470 471 ocrdma_init_debugfs(); 472 473 status = be_roce_register_driver(&ocrdma_drv); 474 if (status) 475 goto err_be_reg; 476 477 return 0; 478 479 err_be_reg: 480 481 return status; 482 } 483 484 static void __exit ocrdma_exit_module(void) 485 { 486 be_roce_unregister_driver(&ocrdma_drv); 487 ocrdma_rem_debugfs(); 488 idr_destroy(&ocrdma_dev_id); 489 } 490 491 module_init(ocrdma_init_module); 492 module_exit(ocrdma_exit_module); 493