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 void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid) 66 { 67 u8 mac_addr[6]; 68 69 memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN); 70 guid[0] = mac_addr[0] ^ 2; 71 guid[1] = mac_addr[1]; 72 guid[2] = mac_addr[2]; 73 guid[3] = 0xff; 74 guid[4] = 0xfe; 75 guid[5] = mac_addr[3]; 76 guid[6] = mac_addr[4]; 77 guid[7] = mac_addr[5]; 78 } 79 static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device, 80 u8 port_num) 81 { 82 return IB_LINK_LAYER_ETHERNET; 83 } 84 85 static int ocrdma_port_immutable(struct ib_device *ibdev, u8 port_num, 86 struct ib_port_immutable *immutable) 87 { 88 struct ib_port_attr attr; 89 struct ocrdma_dev *dev; 90 int err; 91 92 dev = get_ocrdma_dev(ibdev); 93 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE; 94 if (ocrdma_is_udp_encap_supported(dev)) 95 immutable->core_cap_flags |= RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP; 96 97 err = ib_query_port(ibdev, port_num, &attr); 98 if (err) 99 return err; 100 101 immutable->pkey_tbl_len = attr.pkey_tbl_len; 102 immutable->gid_tbl_len = attr.gid_tbl_len; 103 immutable->max_mad_size = IB_MGMT_MAD_SIZE; 104 105 return 0; 106 } 107 108 static void get_dev_fw_str(struct ib_device *device, char *str) 109 { 110 struct ocrdma_dev *dev = get_ocrdma_dev(device); 111 112 snprintf(str, IB_FW_VERSION_NAME_MAX, "%s", &dev->attr.fw_ver[0]); 113 } 114 115 /* OCRDMA sysfs interface */ 116 static ssize_t hw_rev_show(struct device *device, 117 struct device_attribute *attr, char *buf) 118 { 119 struct ocrdma_dev *dev = 120 rdma_device_to_drv_device(device, struct ocrdma_dev, ibdev); 121 122 return scnprintf(buf, PAGE_SIZE, "0x%x\n", dev->nic_info.pdev->vendor); 123 } 124 static DEVICE_ATTR_RO(hw_rev); 125 126 static ssize_t hca_type_show(struct device *device, 127 struct device_attribute *attr, char *buf) 128 { 129 struct ocrdma_dev *dev = 130 rdma_device_to_drv_device(device, struct ocrdma_dev, ibdev); 131 132 return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->model_number[0]); 133 } 134 static DEVICE_ATTR_RO(hca_type); 135 136 static struct attribute *ocrdma_attributes[] = { 137 &dev_attr_hw_rev.attr, 138 &dev_attr_hca_type.attr, 139 NULL 140 }; 141 142 static const struct attribute_group ocrdma_attr_group = { 143 .attrs = ocrdma_attributes, 144 }; 145 146 static const struct ib_device_ops ocrdma_dev_ops = { 147 .alloc_mr = ocrdma_alloc_mr, 148 .alloc_pd = ocrdma_alloc_pd, 149 .alloc_ucontext = ocrdma_alloc_ucontext, 150 .create_ah = ocrdma_create_ah, 151 .create_cq = ocrdma_create_cq, 152 .create_qp = ocrdma_create_qp, 153 .dealloc_pd = ocrdma_dealloc_pd, 154 .dealloc_ucontext = ocrdma_dealloc_ucontext, 155 .dereg_mr = ocrdma_dereg_mr, 156 .destroy_ah = ocrdma_destroy_ah, 157 .destroy_cq = ocrdma_destroy_cq, 158 .destroy_qp = ocrdma_destroy_qp, 159 .get_dev_fw_str = get_dev_fw_str, 160 .get_dma_mr = ocrdma_get_dma_mr, 161 .get_link_layer = ocrdma_link_layer, 162 .get_port_immutable = ocrdma_port_immutable, 163 .map_mr_sg = ocrdma_map_mr_sg, 164 .mmap = ocrdma_mmap, 165 .modify_port = ocrdma_modify_port, 166 .modify_qp = ocrdma_modify_qp, 167 .poll_cq = ocrdma_poll_cq, 168 .post_recv = ocrdma_post_recv, 169 .post_send = ocrdma_post_send, 170 .process_mad = ocrdma_process_mad, 171 .query_ah = ocrdma_query_ah, 172 .query_device = ocrdma_query_device, 173 .query_pkey = ocrdma_query_pkey, 174 .query_port = ocrdma_query_port, 175 .query_qp = ocrdma_query_qp, 176 .reg_user_mr = ocrdma_reg_user_mr, 177 .req_notify_cq = ocrdma_arm_cq, 178 .resize_cq = ocrdma_resize_cq, 179 180 INIT_RDMA_OBJ_SIZE(ib_ah, ocrdma_ah, ibah), 181 INIT_RDMA_OBJ_SIZE(ib_pd, ocrdma_pd, ibpd), 182 INIT_RDMA_OBJ_SIZE(ib_ucontext, ocrdma_ucontext, ibucontext), 183 }; 184 185 static const struct ib_device_ops ocrdma_dev_srq_ops = { 186 .create_srq = ocrdma_create_srq, 187 .destroy_srq = ocrdma_destroy_srq, 188 .modify_srq = ocrdma_modify_srq, 189 .post_srq_recv = ocrdma_post_srq_recv, 190 .query_srq = ocrdma_query_srq, 191 192 INIT_RDMA_OBJ_SIZE(ib_srq, ocrdma_srq, ibsrq), 193 }; 194 195 static int ocrdma_register_device(struct ocrdma_dev *dev) 196 { 197 int ret; 198 199 ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid); 200 BUILD_BUG_ON(sizeof(OCRDMA_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX); 201 memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC, 202 sizeof(OCRDMA_NODE_DESC)); 203 dev->ibdev.owner = THIS_MODULE; 204 dev->ibdev.uverbs_abi_ver = OCRDMA_ABI_VERSION; 205 dev->ibdev.uverbs_cmd_mask = 206 OCRDMA_UVERBS(GET_CONTEXT) | 207 OCRDMA_UVERBS(QUERY_DEVICE) | 208 OCRDMA_UVERBS(QUERY_PORT) | 209 OCRDMA_UVERBS(ALLOC_PD) | 210 OCRDMA_UVERBS(DEALLOC_PD) | 211 OCRDMA_UVERBS(REG_MR) | 212 OCRDMA_UVERBS(DEREG_MR) | 213 OCRDMA_UVERBS(CREATE_COMP_CHANNEL) | 214 OCRDMA_UVERBS(CREATE_CQ) | 215 OCRDMA_UVERBS(RESIZE_CQ) | 216 OCRDMA_UVERBS(DESTROY_CQ) | 217 OCRDMA_UVERBS(REQ_NOTIFY_CQ) | 218 OCRDMA_UVERBS(CREATE_QP) | 219 OCRDMA_UVERBS(MODIFY_QP) | 220 OCRDMA_UVERBS(QUERY_QP) | 221 OCRDMA_UVERBS(DESTROY_QP) | 222 OCRDMA_UVERBS(POLL_CQ) | 223 OCRDMA_UVERBS(POST_SEND) | 224 OCRDMA_UVERBS(POST_RECV); 225 226 dev->ibdev.uverbs_cmd_mask |= 227 OCRDMA_UVERBS(CREATE_AH) | 228 OCRDMA_UVERBS(MODIFY_AH) | 229 OCRDMA_UVERBS(QUERY_AH) | 230 OCRDMA_UVERBS(DESTROY_AH); 231 232 dev->ibdev.node_type = RDMA_NODE_IB_CA; 233 dev->ibdev.phys_port_cnt = 1; 234 dev->ibdev.num_comp_vectors = dev->eq_cnt; 235 236 /* mandatory to support user space verbs consumer. */ 237 dev->ibdev.dev.parent = &dev->nic_info.pdev->dev; 238 239 ib_set_device_ops(&dev->ibdev, &ocrdma_dev_ops); 240 241 if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) { 242 dev->ibdev.uverbs_cmd_mask |= 243 OCRDMA_UVERBS(CREATE_SRQ) | 244 OCRDMA_UVERBS(MODIFY_SRQ) | 245 OCRDMA_UVERBS(QUERY_SRQ) | 246 OCRDMA_UVERBS(DESTROY_SRQ) | 247 OCRDMA_UVERBS(POST_SRQ_RECV); 248 249 ib_set_device_ops(&dev->ibdev, &ocrdma_dev_srq_ops); 250 } 251 rdma_set_device_sysfs_group(&dev->ibdev, &ocrdma_attr_group); 252 dev->ibdev.driver_id = RDMA_DRIVER_OCRDMA; 253 ret = ib_device_set_netdev(&dev->ibdev, dev->nic_info.netdev, 1); 254 if (ret) 255 return ret; 256 257 return ib_register_device(&dev->ibdev, "ocrdma%d"); 258 } 259 260 static int ocrdma_alloc_resources(struct ocrdma_dev *dev) 261 { 262 mutex_init(&dev->dev_lock); 263 dev->cq_tbl = kcalloc(OCRDMA_MAX_CQ, sizeof(struct ocrdma_cq *), 264 GFP_KERNEL); 265 if (!dev->cq_tbl) 266 goto alloc_err; 267 268 if (dev->attr.max_qp) { 269 dev->qp_tbl = kcalloc(OCRDMA_MAX_QP, 270 sizeof(struct ocrdma_qp *), 271 GFP_KERNEL); 272 if (!dev->qp_tbl) 273 goto alloc_err; 274 } 275 276 dev->stag_arr = kcalloc(OCRDMA_MAX_STAG, sizeof(u64), GFP_KERNEL); 277 if (dev->stag_arr == NULL) 278 goto alloc_err; 279 280 ocrdma_alloc_pd_pool(dev); 281 282 if (!ocrdma_alloc_stats_resources(dev)) { 283 pr_err("%s: stats resource allocation failed\n", __func__); 284 goto alloc_err; 285 } 286 287 spin_lock_init(&dev->av_tbl.lock); 288 spin_lock_init(&dev->flush_q_lock); 289 return 0; 290 alloc_err: 291 pr_err("%s(%d) error.\n", __func__, dev->id); 292 return -ENOMEM; 293 } 294 295 static void ocrdma_free_resources(struct ocrdma_dev *dev) 296 { 297 ocrdma_release_stats_resources(dev); 298 kfree(dev->stag_arr); 299 kfree(dev->qp_tbl); 300 kfree(dev->cq_tbl); 301 } 302 303 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info) 304 { 305 int status = 0; 306 u8 lstate = 0; 307 struct ocrdma_dev *dev; 308 309 dev = ib_alloc_device(ocrdma_dev, ibdev); 310 if (!dev) { 311 pr_err("Unable to allocate ib device\n"); 312 return NULL; 313 } 314 315 dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL); 316 if (!dev->mbx_cmd) 317 goto init_err; 318 319 memcpy(&dev->nic_info, dev_info, sizeof(*dev_info)); 320 dev->id = PCI_FUNC(dev->nic_info.pdev->devfn); 321 status = ocrdma_init_hw(dev); 322 if (status) 323 goto init_err; 324 325 status = ocrdma_alloc_resources(dev); 326 if (status) 327 goto alloc_err; 328 329 ocrdma_init_service_level(dev); 330 status = ocrdma_register_device(dev); 331 if (status) 332 goto alloc_err; 333 334 /* Query Link state and update */ 335 status = ocrdma_mbx_get_link_speed(dev, NULL, &lstate); 336 if (!status) 337 ocrdma_update_link_state(dev, lstate); 338 339 /* Init stats */ 340 ocrdma_add_port_stats(dev); 341 /* Interrupt Moderation */ 342 INIT_DELAYED_WORK(&dev->eqd_work, ocrdma_eqd_set_task); 343 schedule_delayed_work(&dev->eqd_work, msecs_to_jiffies(1000)); 344 345 pr_info("%s %s: %s \"%s\" port %d\n", 346 dev_name(&dev->nic_info.pdev->dev), hca_name(dev), 347 port_speed_string(dev), dev->model_number, 348 dev->hba_port_num); 349 pr_info("%s ocrdma%d driver loaded successfully\n", 350 dev_name(&dev->nic_info.pdev->dev), dev->id); 351 return dev; 352 353 alloc_err: 354 ocrdma_free_resources(dev); 355 ocrdma_cleanup_hw(dev); 356 init_err: 357 kfree(dev->mbx_cmd); 358 ib_dealloc_device(&dev->ibdev); 359 pr_err("%s() leaving. ret=%d\n", __func__, status); 360 return NULL; 361 } 362 363 static void ocrdma_remove_free(struct ocrdma_dev *dev) 364 { 365 366 kfree(dev->mbx_cmd); 367 ib_dealloc_device(&dev->ibdev); 368 } 369 370 static void ocrdma_remove(struct ocrdma_dev *dev) 371 { 372 /* first unregister with stack to stop all the active traffic 373 * of the registered clients. 374 */ 375 cancel_delayed_work_sync(&dev->eqd_work); 376 ib_unregister_device(&dev->ibdev); 377 378 ocrdma_rem_port_stats(dev); 379 ocrdma_free_resources(dev); 380 ocrdma_cleanup_hw(dev); 381 ocrdma_remove_free(dev); 382 } 383 384 static int ocrdma_dispatch_port_active(struct ocrdma_dev *dev) 385 { 386 struct ib_event port_event; 387 388 port_event.event = IB_EVENT_PORT_ACTIVE; 389 port_event.element.port_num = 1; 390 port_event.device = &dev->ibdev; 391 ib_dispatch_event(&port_event); 392 return 0; 393 } 394 395 static int ocrdma_dispatch_port_error(struct ocrdma_dev *dev) 396 { 397 struct ib_event err_event; 398 399 err_event.event = IB_EVENT_PORT_ERR; 400 err_event.element.port_num = 1; 401 err_event.device = &dev->ibdev; 402 ib_dispatch_event(&err_event); 403 return 0; 404 } 405 406 static void ocrdma_shutdown(struct ocrdma_dev *dev) 407 { 408 ocrdma_dispatch_port_error(dev); 409 ocrdma_remove(dev); 410 } 411 412 /* event handling via NIC driver ensures that all the NIC specific 413 * initialization done before RoCE driver notifies 414 * event to stack. 415 */ 416 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event) 417 { 418 switch (event) { 419 case BE_DEV_SHUTDOWN: 420 ocrdma_shutdown(dev); 421 break; 422 default: 423 break; 424 } 425 } 426 427 void ocrdma_update_link_state(struct ocrdma_dev *dev, u8 lstate) 428 { 429 if (!(dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)) { 430 dev->flags |= OCRDMA_FLAGS_LINK_STATUS_INIT; 431 if (!lstate) 432 return; 433 } 434 435 if (!lstate) 436 ocrdma_dispatch_port_error(dev); 437 else 438 ocrdma_dispatch_port_active(dev); 439 } 440 441 static struct ocrdma_driver ocrdma_drv = { 442 .name = "ocrdma_driver", 443 .add = ocrdma_add, 444 .remove = ocrdma_remove, 445 .state_change_handler = ocrdma_event_handler, 446 .be_abi_version = OCRDMA_BE_ROCE_ABI_VERSION, 447 }; 448 449 static int __init ocrdma_init_module(void) 450 { 451 int status; 452 453 ocrdma_init_debugfs(); 454 455 status = be_roce_register_driver(&ocrdma_drv); 456 if (status) 457 goto err_be_reg; 458 459 return 0; 460 461 err_be_reg: 462 463 return status; 464 } 465 466 static void __exit ocrdma_exit_module(void) 467 { 468 be_roce_unregister_driver(&ocrdma_drv); 469 ocrdma_rem_debugfs(); 470 } 471 472 module_init(ocrdma_init_module); 473 module_exit(ocrdma_exit_module); 474