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_DESCRIPTION(OCRDMA_ROCE_DRV_DESC " " OCRDMA_ROCE_DRV_VERSION); 62 MODULE_AUTHOR("Emulex Corporation"); 63 MODULE_LICENSE("Dual BSD/GPL"); 64 65 static DEFINE_IDR(ocrdma_dev_id); 66 67 void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid) 68 { 69 u8 mac_addr[6]; 70 71 memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN); 72 guid[0] = mac_addr[0] ^ 2; 73 guid[1] = mac_addr[1]; 74 guid[2] = mac_addr[2]; 75 guid[3] = 0xff; 76 guid[4] = 0xfe; 77 guid[5] = mac_addr[3]; 78 guid[6] = mac_addr[4]; 79 guid[7] = mac_addr[5]; 80 } 81 static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device, 82 u8 port_num) 83 { 84 return IB_LINK_LAYER_ETHERNET; 85 } 86 87 static int ocrdma_port_immutable(struct ib_device *ibdev, u8 port_num, 88 struct ib_port_immutable *immutable) 89 { 90 struct ib_port_attr attr; 91 struct ocrdma_dev *dev; 92 int err; 93 94 dev = get_ocrdma_dev(ibdev); 95 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE; 96 if (ocrdma_is_udp_encap_supported(dev)) 97 immutable->core_cap_flags |= RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP; 98 99 err = ib_query_port(ibdev, port_num, &attr); 100 if (err) 101 return err; 102 103 immutable->pkey_tbl_len = attr.pkey_tbl_len; 104 immutable->gid_tbl_len = attr.gid_tbl_len; 105 immutable->max_mad_size = IB_MGMT_MAD_SIZE; 106 107 return 0; 108 } 109 110 static void get_dev_fw_str(struct ib_device *device, char *str) 111 { 112 struct ocrdma_dev *dev = get_ocrdma_dev(device); 113 114 snprintf(str, IB_FW_VERSION_NAME_MAX, "%s", &dev->attr.fw_ver[0]); 115 } 116 117 static int ocrdma_register_device(struct ocrdma_dev *dev) 118 { 119 strlcpy(dev->ibdev.name, "ocrdma%d", IB_DEVICE_NAME_MAX); 120 ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid); 121 BUILD_BUG_ON(sizeof(OCRDMA_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX); 122 memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC, 123 sizeof(OCRDMA_NODE_DESC)); 124 dev->ibdev.owner = THIS_MODULE; 125 dev->ibdev.uverbs_abi_ver = OCRDMA_ABI_VERSION; 126 dev->ibdev.uverbs_cmd_mask = 127 OCRDMA_UVERBS(GET_CONTEXT) | 128 OCRDMA_UVERBS(QUERY_DEVICE) | 129 OCRDMA_UVERBS(QUERY_PORT) | 130 OCRDMA_UVERBS(ALLOC_PD) | 131 OCRDMA_UVERBS(DEALLOC_PD) | 132 OCRDMA_UVERBS(REG_MR) | 133 OCRDMA_UVERBS(DEREG_MR) | 134 OCRDMA_UVERBS(CREATE_COMP_CHANNEL) | 135 OCRDMA_UVERBS(CREATE_CQ) | 136 OCRDMA_UVERBS(RESIZE_CQ) | 137 OCRDMA_UVERBS(DESTROY_CQ) | 138 OCRDMA_UVERBS(REQ_NOTIFY_CQ) | 139 OCRDMA_UVERBS(CREATE_QP) | 140 OCRDMA_UVERBS(MODIFY_QP) | 141 OCRDMA_UVERBS(QUERY_QP) | 142 OCRDMA_UVERBS(DESTROY_QP) | 143 OCRDMA_UVERBS(POLL_CQ) | 144 OCRDMA_UVERBS(POST_SEND) | 145 OCRDMA_UVERBS(POST_RECV); 146 147 dev->ibdev.uverbs_cmd_mask |= 148 OCRDMA_UVERBS(CREATE_AH) | 149 OCRDMA_UVERBS(MODIFY_AH) | 150 OCRDMA_UVERBS(QUERY_AH) | 151 OCRDMA_UVERBS(DESTROY_AH); 152 153 dev->ibdev.node_type = RDMA_NODE_IB_CA; 154 dev->ibdev.phys_port_cnt = 1; 155 dev->ibdev.num_comp_vectors = dev->eq_cnt; 156 157 /* mandatory verbs. */ 158 dev->ibdev.query_device = ocrdma_query_device; 159 dev->ibdev.query_port = ocrdma_query_port; 160 dev->ibdev.modify_port = ocrdma_modify_port; 161 dev->ibdev.get_netdev = ocrdma_get_netdev; 162 dev->ibdev.get_link_layer = ocrdma_link_layer; 163 dev->ibdev.alloc_pd = ocrdma_alloc_pd; 164 dev->ibdev.dealloc_pd = ocrdma_dealloc_pd; 165 166 dev->ibdev.create_cq = ocrdma_create_cq; 167 dev->ibdev.destroy_cq = ocrdma_destroy_cq; 168 dev->ibdev.resize_cq = ocrdma_resize_cq; 169 170 dev->ibdev.create_qp = ocrdma_create_qp; 171 dev->ibdev.modify_qp = ocrdma_modify_qp; 172 dev->ibdev.query_qp = ocrdma_query_qp; 173 dev->ibdev.destroy_qp = ocrdma_destroy_qp; 174 175 dev->ibdev.query_pkey = ocrdma_query_pkey; 176 dev->ibdev.create_ah = ocrdma_create_ah; 177 dev->ibdev.destroy_ah = ocrdma_destroy_ah; 178 dev->ibdev.query_ah = ocrdma_query_ah; 179 dev->ibdev.modify_ah = ocrdma_modify_ah; 180 181 dev->ibdev.poll_cq = ocrdma_poll_cq; 182 dev->ibdev.post_send = ocrdma_post_send; 183 dev->ibdev.post_recv = ocrdma_post_recv; 184 dev->ibdev.req_notify_cq = ocrdma_arm_cq; 185 186 dev->ibdev.get_dma_mr = ocrdma_get_dma_mr; 187 dev->ibdev.dereg_mr = ocrdma_dereg_mr; 188 dev->ibdev.reg_user_mr = ocrdma_reg_user_mr; 189 190 dev->ibdev.alloc_mr = ocrdma_alloc_mr; 191 dev->ibdev.map_mr_sg = ocrdma_map_mr_sg; 192 193 /* mandatory to support user space verbs consumer. */ 194 dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext; 195 dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext; 196 dev->ibdev.mmap = ocrdma_mmap; 197 dev->ibdev.dev.parent = &dev->nic_info.pdev->dev; 198 199 dev->ibdev.process_mad = ocrdma_process_mad; 200 dev->ibdev.get_port_immutable = ocrdma_port_immutable; 201 dev->ibdev.get_dev_fw_str = get_dev_fw_str; 202 203 if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) { 204 dev->ibdev.uverbs_cmd_mask |= 205 OCRDMA_UVERBS(CREATE_SRQ) | 206 OCRDMA_UVERBS(MODIFY_SRQ) | 207 OCRDMA_UVERBS(QUERY_SRQ) | 208 OCRDMA_UVERBS(DESTROY_SRQ) | 209 OCRDMA_UVERBS(POST_SRQ_RECV); 210 211 dev->ibdev.create_srq = ocrdma_create_srq; 212 dev->ibdev.modify_srq = ocrdma_modify_srq; 213 dev->ibdev.query_srq = ocrdma_query_srq; 214 dev->ibdev.destroy_srq = ocrdma_destroy_srq; 215 dev->ibdev.post_srq_recv = ocrdma_post_srq_recv; 216 } 217 dev->ibdev.driver_id = RDMA_DRIVER_OCRDMA; 218 return ib_register_device(&dev->ibdev, NULL); 219 } 220 221 static int ocrdma_alloc_resources(struct ocrdma_dev *dev) 222 { 223 mutex_init(&dev->dev_lock); 224 dev->cq_tbl = kcalloc(OCRDMA_MAX_CQ, sizeof(struct ocrdma_cq *), 225 GFP_KERNEL); 226 if (!dev->cq_tbl) 227 goto alloc_err; 228 229 if (dev->attr.max_qp) { 230 dev->qp_tbl = kcalloc(OCRDMA_MAX_QP, 231 sizeof(struct ocrdma_qp *), 232 GFP_KERNEL); 233 if (!dev->qp_tbl) 234 goto alloc_err; 235 } 236 237 dev->stag_arr = kcalloc(OCRDMA_MAX_STAG, sizeof(u64), GFP_KERNEL); 238 if (dev->stag_arr == NULL) 239 goto alloc_err; 240 241 ocrdma_alloc_pd_pool(dev); 242 243 if (!ocrdma_alloc_stats_resources(dev)) { 244 pr_err("%s: stats resource allocation failed\n", __func__); 245 goto alloc_err; 246 } 247 248 spin_lock_init(&dev->av_tbl.lock); 249 spin_lock_init(&dev->flush_q_lock); 250 return 0; 251 alloc_err: 252 pr_err("%s(%d) error.\n", __func__, dev->id); 253 return -ENOMEM; 254 } 255 256 static void ocrdma_free_resources(struct ocrdma_dev *dev) 257 { 258 ocrdma_release_stats_resources(dev); 259 kfree(dev->stag_arr); 260 kfree(dev->qp_tbl); 261 kfree(dev->cq_tbl); 262 } 263 264 /* OCRDMA sysfs interface */ 265 static ssize_t show_rev(struct device *device, struct device_attribute *attr, 266 char *buf) 267 { 268 struct ocrdma_dev *dev = dev_get_drvdata(device); 269 270 return scnprintf(buf, PAGE_SIZE, "0x%x\n", dev->nic_info.pdev->vendor); 271 } 272 273 static ssize_t show_hca_type(struct device *device, 274 struct device_attribute *attr, char *buf) 275 { 276 struct ocrdma_dev *dev = dev_get_drvdata(device); 277 278 return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->model_number[0]); 279 } 280 281 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL); 282 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca_type, NULL); 283 284 static struct device_attribute *ocrdma_attributes[] = { 285 &dev_attr_hw_rev, 286 &dev_attr_hca_type 287 }; 288 289 static void ocrdma_remove_sysfiles(struct ocrdma_dev *dev) 290 { 291 int i; 292 293 for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++) 294 device_remove_file(&dev->ibdev.dev, ocrdma_attributes[i]); 295 } 296 297 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info) 298 { 299 int status = 0, i; 300 u8 lstate = 0; 301 struct ocrdma_dev *dev; 302 303 dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev)); 304 if (!dev) { 305 pr_err("Unable to allocate ib device\n"); 306 return NULL; 307 } 308 dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL); 309 if (!dev->mbx_cmd) 310 goto idr_err; 311 312 memcpy(&dev->nic_info, dev_info, sizeof(*dev_info)); 313 dev->id = idr_alloc(&ocrdma_dev_id, NULL, 0, 0, GFP_KERNEL); 314 if (dev->id < 0) 315 goto idr_err; 316 317 status = ocrdma_init_hw(dev); 318 if (status) 319 goto init_err; 320 321 status = ocrdma_alloc_resources(dev); 322 if (status) 323 goto alloc_err; 324 325 ocrdma_init_service_level(dev); 326 status = ocrdma_register_device(dev); 327 if (status) 328 goto alloc_err; 329 330 /* Query Link state and update */ 331 status = ocrdma_mbx_get_link_speed(dev, NULL, &lstate); 332 if (!status) 333 ocrdma_update_link_state(dev, lstate); 334 335 for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++) 336 if (device_create_file(&dev->ibdev.dev, ocrdma_attributes[i])) 337 goto sysfs_err; 338 /* Init stats */ 339 ocrdma_add_port_stats(dev); 340 /* Interrupt Moderation */ 341 INIT_DELAYED_WORK(&dev->eqd_work, ocrdma_eqd_set_task); 342 schedule_delayed_work(&dev->eqd_work, msecs_to_jiffies(1000)); 343 344 pr_info("%s %s: %s \"%s\" port %d\n", 345 dev_name(&dev->nic_info.pdev->dev), hca_name(dev), 346 port_speed_string(dev), dev->model_number, 347 dev->hba_port_num); 348 pr_info("%s ocrdma%d driver loaded successfully\n", 349 dev_name(&dev->nic_info.pdev->dev), dev->id); 350 return dev; 351 352 sysfs_err: 353 ocrdma_remove_sysfiles(dev); 354 alloc_err: 355 ocrdma_free_resources(dev); 356 ocrdma_cleanup_hw(dev); 357 init_err: 358 idr_remove(&ocrdma_dev_id, dev->id); 359 idr_err: 360 kfree(dev->mbx_cmd); 361 ib_dealloc_device(&dev->ibdev); 362 pr_err("%s() leaving. ret=%d\n", __func__, status); 363 return NULL; 364 } 365 366 static void ocrdma_remove_free(struct ocrdma_dev *dev) 367 { 368 369 idr_remove(&ocrdma_dev_id, dev->id); 370 kfree(dev->mbx_cmd); 371 ib_dealloc_device(&dev->ibdev); 372 } 373 374 static void ocrdma_remove(struct ocrdma_dev *dev) 375 { 376 /* first unregister with stack to stop all the active traffic 377 * of the registered clients. 378 */ 379 cancel_delayed_work_sync(&dev->eqd_work); 380 ocrdma_remove_sysfiles(dev); 381 ib_unregister_device(&dev->ibdev); 382 383 ocrdma_rem_port_stats(dev); 384 ocrdma_free_resources(dev); 385 ocrdma_cleanup_hw(dev); 386 ocrdma_remove_free(dev); 387 } 388 389 static int ocrdma_dispatch_port_active(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_dispatch_port_error(struct ocrdma_dev *dev) 401 { 402 struct ib_event err_event; 403 404 err_event.event = IB_EVENT_PORT_ERR; 405 err_event.element.port_num = 1; 406 err_event.device = &dev->ibdev; 407 ib_dispatch_event(&err_event); 408 return 0; 409 } 410 411 static void ocrdma_shutdown(struct ocrdma_dev *dev) 412 { 413 ocrdma_dispatch_port_error(dev); 414 ocrdma_remove(dev); 415 } 416 417 /* event handling via NIC driver ensures that all the NIC specific 418 * initialization done before RoCE driver notifies 419 * event to stack. 420 */ 421 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event) 422 { 423 switch (event) { 424 case BE_DEV_SHUTDOWN: 425 ocrdma_shutdown(dev); 426 break; 427 default: 428 break; 429 } 430 } 431 432 void ocrdma_update_link_state(struct ocrdma_dev *dev, u8 lstate) 433 { 434 if (!(dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)) { 435 dev->flags |= OCRDMA_FLAGS_LINK_STATUS_INIT; 436 if (!lstate) 437 return; 438 } 439 440 if (!lstate) 441 ocrdma_dispatch_port_error(dev); 442 else 443 ocrdma_dispatch_port_active(dev); 444 } 445 446 static struct ocrdma_driver ocrdma_drv = { 447 .name = "ocrdma_driver", 448 .add = ocrdma_add, 449 .remove = ocrdma_remove, 450 .state_change_handler = ocrdma_event_handler, 451 .be_abi_version = OCRDMA_BE_ROCE_ABI_VERSION, 452 }; 453 454 static int __init ocrdma_init_module(void) 455 { 456 int status; 457 458 ocrdma_init_debugfs(); 459 460 status = be_roce_register_driver(&ocrdma_drv); 461 if (status) 462 goto err_be_reg; 463 464 return 0; 465 466 err_be_reg: 467 468 return status; 469 } 470 471 static void __exit ocrdma_exit_module(void) 472 { 473 be_roce_unregister_driver(&ocrdma_drv); 474 ocrdma_rem_debugfs(); 475 idr_destroy(&ocrdma_dev_id); 476 } 477 478 module_init(ocrdma_init_module); 479 module_exit(ocrdma_exit_module); 480