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