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 u32 port_num) 81 { 82 return IB_LINK_LAYER_ETHERNET; 83 } 84 85 static int ocrdma_port_immutable(struct ib_device *ibdev, u32 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 sysfs_emit(buf, "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 sysfs_emit(buf, "%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 .owner = THIS_MODULE, 148 .driver_id = RDMA_DRIVER_OCRDMA, 149 .uverbs_abi_ver = OCRDMA_ABI_VERSION, 150 151 .alloc_mr = ocrdma_alloc_mr, 152 .alloc_pd = ocrdma_alloc_pd, 153 .alloc_ucontext = ocrdma_alloc_ucontext, 154 .create_ah = ocrdma_create_ah, 155 .create_cq = ocrdma_create_cq, 156 .create_qp = ocrdma_create_qp, 157 .create_user_ah = ocrdma_create_ah, 158 .dealloc_pd = ocrdma_dealloc_pd, 159 .dealloc_ucontext = ocrdma_dealloc_ucontext, 160 .dereg_mr = ocrdma_dereg_mr, 161 .destroy_ah = ocrdma_destroy_ah, 162 .destroy_cq = ocrdma_destroy_cq, 163 .destroy_qp = ocrdma_destroy_qp, 164 .device_group = &ocrdma_attr_group, 165 .get_dev_fw_str = get_dev_fw_str, 166 .get_dma_mr = ocrdma_get_dma_mr, 167 .get_link_layer = ocrdma_link_layer, 168 .get_port_immutable = ocrdma_port_immutable, 169 .map_mr_sg = ocrdma_map_mr_sg, 170 .mmap = ocrdma_mmap, 171 .modify_qp = ocrdma_modify_qp, 172 .poll_cq = ocrdma_poll_cq, 173 .post_recv = ocrdma_post_recv, 174 .post_send = ocrdma_post_send, 175 .process_mad = ocrdma_process_mad, 176 .query_ah = ocrdma_query_ah, 177 .query_device = ocrdma_query_device, 178 .query_pkey = ocrdma_query_pkey, 179 .query_port = ocrdma_query_port, 180 .query_qp = ocrdma_query_qp, 181 .reg_user_mr = ocrdma_reg_user_mr, 182 .req_notify_cq = ocrdma_arm_cq, 183 .resize_cq = ocrdma_resize_cq, 184 185 INIT_RDMA_OBJ_SIZE(ib_ah, ocrdma_ah, ibah), 186 INIT_RDMA_OBJ_SIZE(ib_cq, ocrdma_cq, ibcq), 187 INIT_RDMA_OBJ_SIZE(ib_pd, ocrdma_pd, ibpd), 188 INIT_RDMA_OBJ_SIZE(ib_qp, ocrdma_qp, ibqp), 189 INIT_RDMA_OBJ_SIZE(ib_ucontext, ocrdma_ucontext, ibucontext), 190 }; 191 192 static const struct ib_device_ops ocrdma_dev_srq_ops = { 193 .create_srq = ocrdma_create_srq, 194 .destroy_srq = ocrdma_destroy_srq, 195 .modify_srq = ocrdma_modify_srq, 196 .post_srq_recv = ocrdma_post_srq_recv, 197 .query_srq = ocrdma_query_srq, 198 199 INIT_RDMA_OBJ_SIZE(ib_srq, ocrdma_srq, ibsrq), 200 }; 201 202 static int ocrdma_register_device(struct ocrdma_dev *dev) 203 { 204 int ret; 205 206 ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid); 207 BUILD_BUG_ON(sizeof(OCRDMA_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX); 208 memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC, 209 sizeof(OCRDMA_NODE_DESC)); 210 211 dev->ibdev.node_type = RDMA_NODE_IB_CA; 212 dev->ibdev.phys_port_cnt = 1; 213 dev->ibdev.num_comp_vectors = dev->eq_cnt; 214 215 /* mandatory to support user space verbs consumer. */ 216 dev->ibdev.dev.parent = &dev->nic_info.pdev->dev; 217 218 ib_set_device_ops(&dev->ibdev, &ocrdma_dev_ops); 219 220 if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) 221 ib_set_device_ops(&dev->ibdev, &ocrdma_dev_srq_ops); 222 223 ret = ib_device_set_netdev(&dev->ibdev, dev->nic_info.netdev, 1); 224 if (ret) 225 return ret; 226 227 dma_set_max_seg_size(&dev->nic_info.pdev->dev, UINT_MAX); 228 return ib_register_device(&dev->ibdev, "ocrdma%d", 229 &dev->nic_info.pdev->dev); 230 } 231 232 static int ocrdma_alloc_resources(struct ocrdma_dev *dev) 233 { 234 mutex_init(&dev->dev_lock); 235 dev->cq_tbl = kcalloc(OCRDMA_MAX_CQ, sizeof(struct ocrdma_cq *), 236 GFP_KERNEL); 237 if (!dev->cq_tbl) 238 goto alloc_err; 239 240 if (dev->attr.max_qp) { 241 dev->qp_tbl = kcalloc(OCRDMA_MAX_QP, 242 sizeof(struct ocrdma_qp *), 243 GFP_KERNEL); 244 if (!dev->qp_tbl) 245 goto alloc_err; 246 } 247 248 dev->stag_arr = kcalloc(OCRDMA_MAX_STAG, sizeof(u64), GFP_KERNEL); 249 if (dev->stag_arr == NULL) 250 goto alloc_err; 251 252 ocrdma_alloc_pd_pool(dev); 253 254 if (!ocrdma_alloc_stats_resources(dev)) { 255 pr_err("%s: stats resource allocation failed\n", __func__); 256 goto alloc_err; 257 } 258 259 spin_lock_init(&dev->av_tbl.lock); 260 spin_lock_init(&dev->flush_q_lock); 261 return 0; 262 alloc_err: 263 pr_err("%s(%d) error.\n", __func__, dev->id); 264 return -ENOMEM; 265 } 266 267 static void ocrdma_free_resources(struct ocrdma_dev *dev) 268 { 269 ocrdma_release_stats_resources(dev); 270 kfree(dev->stag_arr); 271 kfree(dev->qp_tbl); 272 kfree(dev->cq_tbl); 273 } 274 275 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info) 276 { 277 int status = 0; 278 u8 lstate = 0; 279 struct ocrdma_dev *dev; 280 281 dev = ib_alloc_device(ocrdma_dev, ibdev); 282 if (!dev) { 283 pr_err("Unable to allocate ib device\n"); 284 return NULL; 285 } 286 287 dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL); 288 if (!dev->mbx_cmd) 289 goto init_err; 290 291 memcpy(&dev->nic_info, dev_info, sizeof(*dev_info)); 292 dev->id = PCI_FUNC(dev->nic_info.pdev->devfn); 293 status = ocrdma_init_hw(dev); 294 if (status) 295 goto init_err; 296 297 status = ocrdma_alloc_resources(dev); 298 if (status) 299 goto alloc_err; 300 301 ocrdma_init_service_level(dev); 302 status = ocrdma_register_device(dev); 303 if (status) 304 goto alloc_err; 305 306 /* Query Link state and update */ 307 status = ocrdma_mbx_get_link_speed(dev, NULL, &lstate); 308 if (!status) 309 ocrdma_update_link_state(dev, lstate); 310 311 /* Init stats */ 312 ocrdma_add_port_stats(dev); 313 /* Interrupt Moderation */ 314 INIT_DELAYED_WORK(&dev->eqd_work, ocrdma_eqd_set_task); 315 schedule_delayed_work(&dev->eqd_work, msecs_to_jiffies(1000)); 316 317 pr_info("%s %s: %s \"%s\" port %d\n", 318 dev_name(&dev->nic_info.pdev->dev), hca_name(dev), 319 port_speed_string(dev), dev->model_number, 320 dev->hba_port_num); 321 pr_info("%s ocrdma%d driver loaded successfully\n", 322 dev_name(&dev->nic_info.pdev->dev), dev->id); 323 return dev; 324 325 alloc_err: 326 ocrdma_free_resources(dev); 327 ocrdma_cleanup_hw(dev); 328 init_err: 329 kfree(dev->mbx_cmd); 330 ib_dealloc_device(&dev->ibdev); 331 pr_err("%s() leaving. ret=%d\n", __func__, status); 332 return NULL; 333 } 334 335 static void ocrdma_remove_free(struct ocrdma_dev *dev) 336 { 337 338 kfree(dev->mbx_cmd); 339 ib_dealloc_device(&dev->ibdev); 340 } 341 342 static void ocrdma_remove(struct ocrdma_dev *dev) 343 { 344 /* first unregister with stack to stop all the active traffic 345 * of the registered clients. 346 */ 347 cancel_delayed_work_sync(&dev->eqd_work); 348 ib_unregister_device(&dev->ibdev); 349 350 ocrdma_rem_port_stats(dev); 351 ocrdma_free_resources(dev); 352 ocrdma_cleanup_hw(dev); 353 ocrdma_remove_free(dev); 354 } 355 356 static int ocrdma_dispatch_port_active(struct ocrdma_dev *dev) 357 { 358 struct ib_event port_event; 359 360 port_event.event = IB_EVENT_PORT_ACTIVE; 361 port_event.element.port_num = 1; 362 port_event.device = &dev->ibdev; 363 ib_dispatch_event(&port_event); 364 return 0; 365 } 366 367 static int ocrdma_dispatch_port_error(struct ocrdma_dev *dev) 368 { 369 struct ib_event err_event; 370 371 err_event.event = IB_EVENT_PORT_ERR; 372 err_event.element.port_num = 1; 373 err_event.device = &dev->ibdev; 374 ib_dispatch_event(&err_event); 375 return 0; 376 } 377 378 static void ocrdma_shutdown(struct ocrdma_dev *dev) 379 { 380 ocrdma_dispatch_port_error(dev); 381 ocrdma_remove(dev); 382 } 383 384 /* event handling via NIC driver ensures that all the NIC specific 385 * initialization done before RoCE driver notifies 386 * event to stack. 387 */ 388 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event) 389 { 390 switch (event) { 391 case BE_DEV_SHUTDOWN: 392 ocrdma_shutdown(dev); 393 break; 394 default: 395 break; 396 } 397 } 398 399 void ocrdma_update_link_state(struct ocrdma_dev *dev, u8 lstate) 400 { 401 if (!(dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)) { 402 dev->flags |= OCRDMA_FLAGS_LINK_STATUS_INIT; 403 if (!lstate) 404 return; 405 } 406 407 if (!lstate) 408 ocrdma_dispatch_port_error(dev); 409 else 410 ocrdma_dispatch_port_active(dev); 411 } 412 413 static struct ocrdma_driver ocrdma_drv = { 414 .name = "ocrdma_driver", 415 .add = ocrdma_add, 416 .remove = ocrdma_remove, 417 .state_change_handler = ocrdma_event_handler, 418 .be_abi_version = OCRDMA_BE_ROCE_ABI_VERSION, 419 }; 420 421 static int __init ocrdma_init_module(void) 422 { 423 int status; 424 425 ocrdma_init_debugfs(); 426 427 status = be_roce_register_driver(&ocrdma_drv); 428 if (status) 429 goto err_be_reg; 430 431 return 0; 432 433 err_be_reg: 434 435 return status; 436 } 437 438 static void __exit ocrdma_exit_module(void) 439 { 440 be_roce_unregister_driver(&ocrdma_drv); 441 ocrdma_rem_debugfs(); 442 } 443 444 module_init(ocrdma_init_module); 445 module_exit(ocrdma_exit_module); 446