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 enum rdma_link_layer ocrdma_link_layer(struct ib_device *device, 66 u32 port_num) 67 { 68 return IB_LINK_LAYER_ETHERNET; 69 } 70 71 static int ocrdma_port_immutable(struct ib_device *ibdev, u32 port_num, 72 struct ib_port_immutable *immutable) 73 { 74 struct ib_port_attr attr; 75 struct ocrdma_dev *dev; 76 int err; 77 78 dev = get_ocrdma_dev(ibdev); 79 immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE; 80 if (ocrdma_is_udp_encap_supported(dev)) 81 immutable->core_cap_flags |= RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP; 82 83 err = ib_query_port(ibdev, port_num, &attr); 84 if (err) 85 return err; 86 87 immutable->pkey_tbl_len = attr.pkey_tbl_len; 88 immutable->gid_tbl_len = attr.gid_tbl_len; 89 immutable->max_mad_size = IB_MGMT_MAD_SIZE; 90 91 return 0; 92 } 93 94 static void get_dev_fw_str(struct ib_device *device, char *str) 95 { 96 struct ocrdma_dev *dev = get_ocrdma_dev(device); 97 98 snprintf(str, IB_FW_VERSION_NAME_MAX, "%s", &dev->attr.fw_ver[0]); 99 } 100 101 /* OCRDMA sysfs interface */ 102 static ssize_t hw_rev_show(struct device *device, 103 struct device_attribute *attr, char *buf) 104 { 105 struct ocrdma_dev *dev = 106 rdma_device_to_drv_device(device, struct ocrdma_dev, ibdev); 107 108 return sysfs_emit(buf, "0x%x\n", dev->nic_info.pdev->vendor); 109 } 110 static DEVICE_ATTR_RO(hw_rev); 111 112 static ssize_t hca_type_show(struct device *device, 113 struct device_attribute *attr, char *buf) 114 { 115 struct ocrdma_dev *dev = 116 rdma_device_to_drv_device(device, struct ocrdma_dev, ibdev); 117 118 return sysfs_emit(buf, "%s\n", &dev->model_number[0]); 119 } 120 static DEVICE_ATTR_RO(hca_type); 121 122 static struct attribute *ocrdma_attributes[] = { 123 &dev_attr_hw_rev.attr, 124 &dev_attr_hca_type.attr, 125 NULL 126 }; 127 128 static const struct attribute_group ocrdma_attr_group = { 129 .attrs = ocrdma_attributes, 130 }; 131 132 static const struct ib_device_ops ocrdma_dev_ops = { 133 .owner = THIS_MODULE, 134 .driver_id = RDMA_DRIVER_OCRDMA, 135 .uverbs_abi_ver = OCRDMA_ABI_VERSION, 136 137 .alloc_mr = ocrdma_alloc_mr, 138 .alloc_pd = ocrdma_alloc_pd, 139 .alloc_ucontext = ocrdma_alloc_ucontext, 140 .create_ah = ocrdma_create_ah, 141 .create_cq = ocrdma_create_cq, 142 .create_qp = ocrdma_create_qp, 143 .create_user_ah = ocrdma_create_ah, 144 .dealloc_pd = ocrdma_dealloc_pd, 145 .dealloc_ucontext = ocrdma_dealloc_ucontext, 146 .dereg_mr = ocrdma_dereg_mr, 147 .destroy_ah = ocrdma_destroy_ah, 148 .destroy_cq = ocrdma_destroy_cq, 149 .destroy_qp = ocrdma_destroy_qp, 150 .device_group = &ocrdma_attr_group, 151 .get_dev_fw_str = get_dev_fw_str, 152 .get_dma_mr = ocrdma_get_dma_mr, 153 .get_link_layer = ocrdma_link_layer, 154 .get_port_immutable = ocrdma_port_immutable, 155 .map_mr_sg = ocrdma_map_mr_sg, 156 .mmap = ocrdma_mmap, 157 .modify_qp = ocrdma_modify_qp, 158 .poll_cq = ocrdma_poll_cq, 159 .post_recv = ocrdma_post_recv, 160 .post_send = ocrdma_post_send, 161 .process_mad = ocrdma_process_mad, 162 .query_ah = ocrdma_query_ah, 163 .query_device = ocrdma_query_device, 164 .query_pkey = ocrdma_query_pkey, 165 .query_port = ocrdma_query_port, 166 .query_qp = ocrdma_query_qp, 167 .reg_user_mr = ocrdma_reg_user_mr, 168 .req_notify_cq = ocrdma_arm_cq, 169 .resize_cq = ocrdma_resize_cq, 170 171 INIT_RDMA_OBJ_SIZE(ib_ah, ocrdma_ah, ibah), 172 INIT_RDMA_OBJ_SIZE(ib_cq, ocrdma_cq, ibcq), 173 INIT_RDMA_OBJ_SIZE(ib_pd, ocrdma_pd, ibpd), 174 INIT_RDMA_OBJ_SIZE(ib_qp, ocrdma_qp, ibqp), 175 INIT_RDMA_OBJ_SIZE(ib_ucontext, ocrdma_ucontext, ibucontext), 176 }; 177 178 static const struct ib_device_ops ocrdma_dev_srq_ops = { 179 .create_srq = ocrdma_create_srq, 180 .destroy_srq = ocrdma_destroy_srq, 181 .modify_srq = ocrdma_modify_srq, 182 .post_srq_recv = ocrdma_post_srq_recv, 183 .query_srq = ocrdma_query_srq, 184 185 INIT_RDMA_OBJ_SIZE(ib_srq, ocrdma_srq, ibsrq), 186 }; 187 188 static int ocrdma_register_device(struct ocrdma_dev *dev) 189 { 190 int ret; 191 192 addrconf_addr_eui48((u8 *)&dev->ibdev.node_guid, 193 dev->nic_info.mac_addr); 194 BUILD_BUG_ON(sizeof(OCRDMA_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX); 195 memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC, 196 sizeof(OCRDMA_NODE_DESC)); 197 198 dev->ibdev.node_type = RDMA_NODE_IB_CA; 199 dev->ibdev.phys_port_cnt = 1; 200 dev->ibdev.num_comp_vectors = dev->eq_cnt; 201 202 /* mandatory to support user space verbs consumer. */ 203 dev->ibdev.dev.parent = &dev->nic_info.pdev->dev; 204 205 ib_set_device_ops(&dev->ibdev, &ocrdma_dev_ops); 206 207 if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) 208 ib_set_device_ops(&dev->ibdev, &ocrdma_dev_srq_ops); 209 210 ret = ib_device_set_netdev(&dev->ibdev, dev->nic_info.netdev, 1); 211 if (ret) 212 return ret; 213 214 dma_set_max_seg_size(&dev->nic_info.pdev->dev, UINT_MAX); 215 return ib_register_device(&dev->ibdev, "ocrdma%d", 216 &dev->nic_info.pdev->dev); 217 } 218 219 static int ocrdma_alloc_resources(struct ocrdma_dev *dev) 220 { 221 mutex_init(&dev->dev_lock); 222 dev->cq_tbl = kcalloc(OCRDMA_MAX_CQ, sizeof(struct ocrdma_cq *), 223 GFP_KERNEL); 224 if (!dev->cq_tbl) 225 goto alloc_err; 226 227 if (dev->attr.max_qp) { 228 dev->qp_tbl = kcalloc(OCRDMA_MAX_QP, 229 sizeof(struct ocrdma_qp *), 230 GFP_KERNEL); 231 if (!dev->qp_tbl) 232 goto alloc_err; 233 } 234 235 dev->stag_arr = kcalloc(OCRDMA_MAX_STAG, sizeof(u64), GFP_KERNEL); 236 if (dev->stag_arr == NULL) 237 goto alloc_err; 238 239 ocrdma_alloc_pd_pool(dev); 240 241 if (!ocrdma_alloc_stats_resources(dev)) { 242 pr_err("%s: stats resource allocation failed\n", __func__); 243 goto alloc_err; 244 } 245 246 spin_lock_init(&dev->av_tbl.lock); 247 spin_lock_init(&dev->flush_q_lock); 248 return 0; 249 alloc_err: 250 pr_err("%s(%d) error.\n", __func__, dev->id); 251 return -ENOMEM; 252 } 253 254 static void ocrdma_free_resources(struct ocrdma_dev *dev) 255 { 256 ocrdma_release_stats_resources(dev); 257 kfree(dev->stag_arr); 258 kfree(dev->qp_tbl); 259 kfree(dev->cq_tbl); 260 } 261 262 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info) 263 { 264 int status = 0; 265 u8 lstate = 0; 266 struct ocrdma_dev *dev; 267 268 dev = ib_alloc_device(ocrdma_dev, ibdev); 269 if (!dev) { 270 pr_err("Unable to allocate ib device\n"); 271 return NULL; 272 } 273 274 dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL); 275 if (!dev->mbx_cmd) 276 goto init_err; 277 278 memcpy(&dev->nic_info, dev_info, sizeof(*dev_info)); 279 dev->id = PCI_FUNC(dev->nic_info.pdev->devfn); 280 status = ocrdma_init_hw(dev); 281 if (status) 282 goto init_err; 283 284 status = ocrdma_alloc_resources(dev); 285 if (status) 286 goto alloc_err; 287 288 ocrdma_init_service_level(dev); 289 status = ocrdma_register_device(dev); 290 if (status) 291 goto alloc_err; 292 293 /* Query Link state and update */ 294 status = ocrdma_mbx_get_link_speed(dev, NULL, &lstate); 295 if (!status) 296 ocrdma_update_link_state(dev, lstate); 297 298 /* Init stats */ 299 ocrdma_add_port_stats(dev); 300 /* Interrupt Moderation */ 301 INIT_DELAYED_WORK(&dev->eqd_work, ocrdma_eqd_set_task); 302 schedule_delayed_work(&dev->eqd_work, msecs_to_jiffies(1000)); 303 304 pr_info("%s %s: %s \"%s\" port %d\n", 305 dev_name(&dev->nic_info.pdev->dev), hca_name(dev), 306 port_speed_string(dev), dev->model_number, 307 dev->hba_port_num); 308 pr_info("%s ocrdma%d driver loaded successfully\n", 309 dev_name(&dev->nic_info.pdev->dev), dev->id); 310 return dev; 311 312 alloc_err: 313 ocrdma_free_resources(dev); 314 ocrdma_cleanup_hw(dev); 315 init_err: 316 kfree(dev->mbx_cmd); 317 ib_dealloc_device(&dev->ibdev); 318 pr_err("%s() leaving. ret=%d\n", __func__, status); 319 return NULL; 320 } 321 322 static void ocrdma_remove_free(struct ocrdma_dev *dev) 323 { 324 325 kfree(dev->mbx_cmd); 326 ib_dealloc_device(&dev->ibdev); 327 } 328 329 static void ocrdma_remove(struct ocrdma_dev *dev) 330 { 331 /* first unregister with stack to stop all the active traffic 332 * of the registered clients. 333 */ 334 cancel_delayed_work_sync(&dev->eqd_work); 335 ib_unregister_device(&dev->ibdev); 336 337 ocrdma_rem_port_stats(dev); 338 ocrdma_free_resources(dev); 339 ocrdma_cleanup_hw(dev); 340 ocrdma_remove_free(dev); 341 } 342 343 static int ocrdma_dispatch_port_active(struct ocrdma_dev *dev) 344 { 345 struct ib_event port_event; 346 347 port_event.event = IB_EVENT_PORT_ACTIVE; 348 port_event.element.port_num = 1; 349 port_event.device = &dev->ibdev; 350 ib_dispatch_event(&port_event); 351 return 0; 352 } 353 354 static int ocrdma_dispatch_port_error(struct ocrdma_dev *dev) 355 { 356 struct ib_event err_event; 357 358 err_event.event = IB_EVENT_PORT_ERR; 359 err_event.element.port_num = 1; 360 err_event.device = &dev->ibdev; 361 ib_dispatch_event(&err_event); 362 return 0; 363 } 364 365 static void ocrdma_shutdown(struct ocrdma_dev *dev) 366 { 367 ocrdma_dispatch_port_error(dev); 368 ocrdma_remove(dev); 369 } 370 371 /* event handling via NIC driver ensures that all the NIC specific 372 * initialization done before RoCE driver notifies 373 * event to stack. 374 */ 375 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event) 376 { 377 switch (event) { 378 case BE_DEV_SHUTDOWN: 379 ocrdma_shutdown(dev); 380 break; 381 default: 382 break; 383 } 384 } 385 386 void ocrdma_update_link_state(struct ocrdma_dev *dev, u8 lstate) 387 { 388 if (!(dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)) { 389 dev->flags |= OCRDMA_FLAGS_LINK_STATUS_INIT; 390 if (!lstate) 391 return; 392 } 393 394 if (!lstate) 395 ocrdma_dispatch_port_error(dev); 396 else 397 ocrdma_dispatch_port_active(dev); 398 } 399 400 static struct ocrdma_driver ocrdma_drv = { 401 .name = "ocrdma_driver", 402 .add = ocrdma_add, 403 .remove = ocrdma_remove, 404 .state_change_handler = ocrdma_event_handler, 405 .be_abi_version = OCRDMA_BE_ROCE_ABI_VERSION, 406 }; 407 408 static int __init ocrdma_init_module(void) 409 { 410 int status; 411 412 ocrdma_init_debugfs(); 413 414 status = be_roce_register_driver(&ocrdma_drv); 415 if (status) 416 goto err_be_reg; 417 418 return 0; 419 420 err_be_reg: 421 422 return status; 423 } 424 425 static void __exit ocrdma_exit_module(void) 426 { 427 be_roce_unregister_driver(&ocrdma_drv); 428 ocrdma_rem_debugfs(); 429 } 430 431 module_init(ocrdma_init_module); 432 module_exit(ocrdma_exit_module); 433