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 <rdma/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 DEFINE_IDR(ocrdma_dev_id); 67 68 void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid) 69 { 70 u8 mac_addr[6]; 71 72 memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN); 73 guid[0] = mac_addr[0] ^ 2; 74 guid[1] = mac_addr[1]; 75 guid[2] = mac_addr[2]; 76 guid[3] = 0xff; 77 guid[4] = 0xfe; 78 guid[5] = mac_addr[3]; 79 guid[6] = mac_addr[4]; 80 guid[7] = mac_addr[5]; 81 } 82 static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device, 83 u8 port_num) 84 { 85 return IB_LINK_LAYER_ETHERNET; 86 } 87 88 static int ocrdma_port_immutable(struct ib_device *ibdev, u8 port_num, 89 struct ib_port_immutable *immutable) 90 { 91 struct ib_port_attr attr; 92 struct ocrdma_dev *dev; 93 int err; 94 95 dev = get_ocrdma_dev(ibdev); 96 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE; 97 if (ocrdma_is_udp_encap_supported(dev)) 98 immutable->core_cap_flags |= RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP; 99 100 err = ib_query_port(ibdev, port_num, &attr); 101 if (err) 102 return err; 103 104 immutable->pkey_tbl_len = attr.pkey_tbl_len; 105 immutable->gid_tbl_len = attr.gid_tbl_len; 106 immutable->max_mad_size = IB_MGMT_MAD_SIZE; 107 108 return 0; 109 } 110 111 static void get_dev_fw_str(struct ib_device *device, char *str, 112 size_t str_len) 113 { 114 struct ocrdma_dev *dev = get_ocrdma_dev(device); 115 116 snprintf(str, str_len, "%s", &dev->attr.fw_ver[0]); 117 } 118 119 static int ocrdma_register_device(struct ocrdma_dev *dev) 120 { 121 strlcpy(dev->ibdev.name, "ocrdma%d", IB_DEVICE_NAME_MAX); 122 ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid); 123 BUILD_BUG_ON(sizeof(OCRDMA_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX); 124 memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC, 125 sizeof(OCRDMA_NODE_DESC)); 126 dev->ibdev.owner = THIS_MODULE; 127 dev->ibdev.uverbs_abi_ver = OCRDMA_ABI_VERSION; 128 dev->ibdev.uverbs_cmd_mask = 129 OCRDMA_UVERBS(GET_CONTEXT) | 130 OCRDMA_UVERBS(QUERY_DEVICE) | 131 OCRDMA_UVERBS(QUERY_PORT) | 132 OCRDMA_UVERBS(ALLOC_PD) | 133 OCRDMA_UVERBS(DEALLOC_PD) | 134 OCRDMA_UVERBS(REG_MR) | 135 OCRDMA_UVERBS(DEREG_MR) | 136 OCRDMA_UVERBS(CREATE_COMP_CHANNEL) | 137 OCRDMA_UVERBS(CREATE_CQ) | 138 OCRDMA_UVERBS(RESIZE_CQ) | 139 OCRDMA_UVERBS(DESTROY_CQ) | 140 OCRDMA_UVERBS(REQ_NOTIFY_CQ) | 141 OCRDMA_UVERBS(CREATE_QP) | 142 OCRDMA_UVERBS(MODIFY_QP) | 143 OCRDMA_UVERBS(QUERY_QP) | 144 OCRDMA_UVERBS(DESTROY_QP) | 145 OCRDMA_UVERBS(POLL_CQ) | 146 OCRDMA_UVERBS(POST_SEND) | 147 OCRDMA_UVERBS(POST_RECV); 148 149 dev->ibdev.uverbs_cmd_mask |= 150 OCRDMA_UVERBS(CREATE_AH) | 151 OCRDMA_UVERBS(MODIFY_AH) | 152 OCRDMA_UVERBS(QUERY_AH) | 153 OCRDMA_UVERBS(DESTROY_AH); 154 155 dev->ibdev.node_type = RDMA_NODE_IB_CA; 156 dev->ibdev.phys_port_cnt = 1; 157 dev->ibdev.num_comp_vectors = dev->eq_cnt; 158 159 /* mandatory verbs. */ 160 dev->ibdev.query_device = ocrdma_query_device; 161 dev->ibdev.query_port = ocrdma_query_port; 162 dev->ibdev.modify_port = ocrdma_modify_port; 163 dev->ibdev.query_gid = ocrdma_query_gid; 164 dev->ibdev.get_netdev = ocrdma_get_netdev; 165 dev->ibdev.add_gid = ocrdma_add_gid; 166 dev->ibdev.del_gid = ocrdma_del_gid; 167 dev->ibdev.get_link_layer = ocrdma_link_layer; 168 dev->ibdev.alloc_pd = ocrdma_alloc_pd; 169 dev->ibdev.dealloc_pd = ocrdma_dealloc_pd; 170 171 dev->ibdev.create_cq = ocrdma_create_cq; 172 dev->ibdev.destroy_cq = ocrdma_destroy_cq; 173 dev->ibdev.resize_cq = ocrdma_resize_cq; 174 175 dev->ibdev.create_qp = ocrdma_create_qp; 176 dev->ibdev.modify_qp = ocrdma_modify_qp; 177 dev->ibdev.query_qp = ocrdma_query_qp; 178 dev->ibdev.destroy_qp = ocrdma_destroy_qp; 179 180 dev->ibdev.query_pkey = ocrdma_query_pkey; 181 dev->ibdev.create_ah = ocrdma_create_ah; 182 dev->ibdev.destroy_ah = ocrdma_destroy_ah; 183 dev->ibdev.query_ah = ocrdma_query_ah; 184 dev->ibdev.modify_ah = ocrdma_modify_ah; 185 186 dev->ibdev.poll_cq = ocrdma_poll_cq; 187 dev->ibdev.post_send = ocrdma_post_send; 188 dev->ibdev.post_recv = ocrdma_post_recv; 189 dev->ibdev.req_notify_cq = ocrdma_arm_cq; 190 191 dev->ibdev.get_dma_mr = ocrdma_get_dma_mr; 192 dev->ibdev.dereg_mr = ocrdma_dereg_mr; 193 dev->ibdev.reg_user_mr = ocrdma_reg_user_mr; 194 195 dev->ibdev.alloc_mr = ocrdma_alloc_mr; 196 dev->ibdev.map_mr_sg = ocrdma_map_mr_sg; 197 198 /* mandatory to support user space verbs consumer. */ 199 dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext; 200 dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext; 201 dev->ibdev.mmap = ocrdma_mmap; 202 dev->ibdev.dma_device = &dev->nic_info.pdev->dev; 203 204 dev->ibdev.process_mad = ocrdma_process_mad; 205 dev->ibdev.get_port_immutable = ocrdma_port_immutable; 206 dev->ibdev.get_dev_fw_str = get_dev_fw_str; 207 208 if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) { 209 dev->ibdev.uverbs_cmd_mask |= 210 OCRDMA_UVERBS(CREATE_SRQ) | 211 OCRDMA_UVERBS(MODIFY_SRQ) | 212 OCRDMA_UVERBS(QUERY_SRQ) | 213 OCRDMA_UVERBS(DESTROY_SRQ) | 214 OCRDMA_UVERBS(POST_SRQ_RECV); 215 216 dev->ibdev.create_srq = ocrdma_create_srq; 217 dev->ibdev.modify_srq = ocrdma_modify_srq; 218 dev->ibdev.query_srq = ocrdma_query_srq; 219 dev->ibdev.destroy_srq = ocrdma_destroy_srq; 220 dev->ibdev.post_srq_recv = ocrdma_post_srq_recv; 221 } 222 return ib_register_device(&dev->ibdev, NULL); 223 } 224 225 static int ocrdma_alloc_resources(struct ocrdma_dev *dev) 226 { 227 mutex_init(&dev->dev_lock); 228 dev->cq_tbl = kzalloc(sizeof(struct ocrdma_cq *) * 229 OCRDMA_MAX_CQ, GFP_KERNEL); 230 if (!dev->cq_tbl) 231 goto alloc_err; 232 233 if (dev->attr.max_qp) { 234 dev->qp_tbl = kzalloc(sizeof(struct ocrdma_qp *) * 235 OCRDMA_MAX_QP, GFP_KERNEL); 236 if (!dev->qp_tbl) 237 goto alloc_err; 238 } 239 240 dev->stag_arr = kzalloc(sizeof(u64) * OCRDMA_MAX_STAG, GFP_KERNEL); 241 if (dev->stag_arr == NULL) 242 goto alloc_err; 243 244 ocrdma_alloc_pd_pool(dev); 245 246 if (!ocrdma_alloc_stats_resources(dev)) { 247 pr_err("%s: stats resource allocation failed\n", __func__); 248 goto alloc_err; 249 } 250 251 spin_lock_init(&dev->av_tbl.lock); 252 spin_lock_init(&dev->flush_q_lock); 253 return 0; 254 alloc_err: 255 pr_err("%s(%d) error.\n", __func__, dev->id); 256 return -ENOMEM; 257 } 258 259 static void ocrdma_free_resources(struct ocrdma_dev *dev) 260 { 261 ocrdma_release_stats_resources(dev); 262 kfree(dev->stag_arr); 263 kfree(dev->qp_tbl); 264 kfree(dev->cq_tbl); 265 } 266 267 /* OCRDMA sysfs interface */ 268 static ssize_t show_rev(struct device *device, struct device_attribute *attr, 269 char *buf) 270 { 271 struct ocrdma_dev *dev = dev_get_drvdata(device); 272 273 return scnprintf(buf, PAGE_SIZE, "0x%x\n", dev->nic_info.pdev->vendor); 274 } 275 276 static ssize_t show_hca_type(struct device *device, 277 struct device_attribute *attr, char *buf) 278 { 279 struct ocrdma_dev *dev = dev_get_drvdata(device); 280 281 return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->model_number[0]); 282 } 283 284 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL); 285 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca_type, NULL); 286 287 static struct device_attribute *ocrdma_attributes[] = { 288 &dev_attr_hw_rev, 289 &dev_attr_hca_type 290 }; 291 292 static void ocrdma_remove_sysfiles(struct ocrdma_dev *dev) 293 { 294 int i; 295 296 for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++) 297 device_remove_file(&dev->ibdev.dev, ocrdma_attributes[i]); 298 } 299 300 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info) 301 { 302 int status = 0, i; 303 u8 lstate = 0; 304 struct ocrdma_dev *dev; 305 306 dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev)); 307 if (!dev) { 308 pr_err("Unable to allocate ib device\n"); 309 return NULL; 310 } 311 dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL); 312 if (!dev->mbx_cmd) 313 goto idr_err; 314 315 memcpy(&dev->nic_info, dev_info, sizeof(*dev_info)); 316 dev->id = idr_alloc(&ocrdma_dev_id, NULL, 0, 0, GFP_KERNEL); 317 if (dev->id < 0) 318 goto idr_err; 319 320 status = ocrdma_init_hw(dev); 321 if (status) 322 goto init_err; 323 324 status = ocrdma_alloc_resources(dev); 325 if (status) 326 goto alloc_err; 327 328 ocrdma_init_service_level(dev); 329 status = ocrdma_register_device(dev); 330 if (status) 331 goto alloc_err; 332 333 /* Query Link state and update */ 334 status = ocrdma_mbx_get_link_speed(dev, NULL, &lstate); 335 if (!status) 336 ocrdma_update_link_state(dev, lstate); 337 338 for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++) 339 if (device_create_file(&dev->ibdev.dev, ocrdma_attributes[i])) 340 goto sysfs_err; 341 /* Init stats */ 342 ocrdma_add_port_stats(dev); 343 /* Interrupt Moderation */ 344 INIT_DELAYED_WORK(&dev->eqd_work, ocrdma_eqd_set_task); 345 schedule_delayed_work(&dev->eqd_work, msecs_to_jiffies(1000)); 346 347 pr_info("%s %s: %s \"%s\" port %d\n", 348 dev_name(&dev->nic_info.pdev->dev), hca_name(dev), 349 port_speed_string(dev), dev->model_number, 350 dev->hba_port_num); 351 pr_info("%s ocrdma%d driver loaded successfully\n", 352 dev_name(&dev->nic_info.pdev->dev), dev->id); 353 return dev; 354 355 sysfs_err: 356 ocrdma_remove_sysfiles(dev); 357 alloc_err: 358 ocrdma_free_resources(dev); 359 ocrdma_cleanup_hw(dev); 360 init_err: 361 idr_remove(&ocrdma_dev_id, dev->id); 362 idr_err: 363 kfree(dev->mbx_cmd); 364 ib_dealloc_device(&dev->ibdev); 365 pr_err("%s() leaving. ret=%d\n", __func__, status); 366 return NULL; 367 } 368 369 static void ocrdma_remove_free(struct ocrdma_dev *dev) 370 { 371 372 idr_remove(&ocrdma_dev_id, dev->id); 373 kfree(dev->mbx_cmd); 374 ib_dealloc_device(&dev->ibdev); 375 } 376 377 static void ocrdma_remove(struct ocrdma_dev *dev) 378 { 379 /* first unregister with stack to stop all the active traffic 380 * of the registered clients. 381 */ 382 cancel_delayed_work_sync(&dev->eqd_work); 383 ocrdma_remove_sysfiles(dev); 384 ib_unregister_device(&dev->ibdev); 385 386 ocrdma_rem_port_stats(dev); 387 ocrdma_free_resources(dev); 388 ocrdma_cleanup_hw(dev); 389 ocrdma_remove_free(dev); 390 } 391 392 static int ocrdma_dispatch_port_active(struct ocrdma_dev *dev) 393 { 394 struct ib_event port_event; 395 396 port_event.event = IB_EVENT_PORT_ACTIVE; 397 port_event.element.port_num = 1; 398 port_event.device = &dev->ibdev; 399 ib_dispatch_event(&port_event); 400 return 0; 401 } 402 403 static int ocrdma_dispatch_port_error(struct ocrdma_dev *dev) 404 { 405 struct ib_event err_event; 406 407 err_event.event = IB_EVENT_PORT_ERR; 408 err_event.element.port_num = 1; 409 err_event.device = &dev->ibdev; 410 ib_dispatch_event(&err_event); 411 return 0; 412 } 413 414 static void ocrdma_shutdown(struct ocrdma_dev *dev) 415 { 416 ocrdma_dispatch_port_error(dev); 417 ocrdma_remove(dev); 418 } 419 420 /* event handling via NIC driver ensures that all the NIC specific 421 * initialization done before RoCE driver notifies 422 * event to stack. 423 */ 424 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event) 425 { 426 switch (event) { 427 case BE_DEV_SHUTDOWN: 428 ocrdma_shutdown(dev); 429 break; 430 default: 431 break; 432 } 433 } 434 435 void ocrdma_update_link_state(struct ocrdma_dev *dev, u8 lstate) 436 { 437 if (!(dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)) { 438 dev->flags |= OCRDMA_FLAGS_LINK_STATUS_INIT; 439 if (!lstate) 440 return; 441 } 442 443 if (!lstate) 444 ocrdma_dispatch_port_error(dev); 445 else 446 ocrdma_dispatch_port_active(dev); 447 } 448 449 static struct ocrdma_driver ocrdma_drv = { 450 .name = "ocrdma_driver", 451 .add = ocrdma_add, 452 .remove = ocrdma_remove, 453 .state_change_handler = ocrdma_event_handler, 454 .be_abi_version = OCRDMA_BE_ROCE_ABI_VERSION, 455 }; 456 457 static int __init ocrdma_init_module(void) 458 { 459 int status; 460 461 ocrdma_init_debugfs(); 462 463 status = be_roce_register_driver(&ocrdma_drv); 464 if (status) 465 goto err_be_reg; 466 467 return 0; 468 469 err_be_reg: 470 471 return status; 472 } 473 474 static void __exit ocrdma_exit_module(void) 475 { 476 be_roce_unregister_driver(&ocrdma_drv); 477 ocrdma_rem_debugfs(); 478 idr_destroy(&ocrdma_dev_id); 479 } 480 481 module_init(ocrdma_init_module); 482 module_exit(ocrdma_exit_module); 483