drivers/infiniband/hw/ocrdma/ocrdma_main.c

   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         struct ocrdma_dev *dev;
  93         int err;
  94
  95         dev = get_ocrdma_dev(ibdev);
  96         err = ocrdma_query_port(ibdev, port_num, &attr);
  97         if (err)
  98                 return err;
  99
 100         immutable->pkey_tbl_len = attr.pkey_tbl_len;
 101         immutable->gid_tbl_len = attr.gid_tbl_len;
 102         immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE;
 103         if (ocrdma_is_udp_encap_supported(dev))
 104                 immutable->core_cap_flags |= RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP;
 105         immutable->max_mad_size = IB_MGMT_MAD_SIZE;
 106
 107         return 0;
 108 }
 109
 110 static int ocrdma_register_device(struct ocrdma_dev *dev)
 111 {
 112         strlcpy(dev->ibdev.name, "ocrdma%d", IB_DEVICE_NAME_MAX);
 113         ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid);
 114         memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
 115                sizeof(OCRDMA_NODE_DESC));
 116         dev->ibdev.owner = THIS_MODULE;
 117         dev->ibdev.uverbs_abi_ver = OCRDMA_ABI_VERSION;
 118         dev->ibdev.uverbs_cmd_mask =
 119             OCRDMA_UVERBS(GET_CONTEXT) |
 120             OCRDMA_UVERBS(QUERY_DEVICE) |
 121             OCRDMA_UVERBS(QUERY_PORT) |
 122             OCRDMA_UVERBS(ALLOC_PD) |
 123             OCRDMA_UVERBS(DEALLOC_PD) |
 124             OCRDMA_UVERBS(REG_MR) |
 125             OCRDMA_UVERBS(DEREG_MR) |
 126             OCRDMA_UVERBS(CREATE_COMP_CHANNEL) |
 127             OCRDMA_UVERBS(CREATE_CQ) |
 128             OCRDMA_UVERBS(RESIZE_CQ) |
 129             OCRDMA_UVERBS(DESTROY_CQ) |
 130             OCRDMA_UVERBS(REQ_NOTIFY_CQ) |
 131             OCRDMA_UVERBS(CREATE_QP) |
 132             OCRDMA_UVERBS(MODIFY_QP) |
 133             OCRDMA_UVERBS(QUERY_QP) |
 134             OCRDMA_UVERBS(DESTROY_QP) |
 135             OCRDMA_UVERBS(POLL_CQ) |
 136             OCRDMA_UVERBS(POST_SEND) |
 137             OCRDMA_UVERBS(POST_RECV);
 138
 139         dev->ibdev.uverbs_cmd_mask |=
 140             OCRDMA_UVERBS(CREATE_AH) |
 141              OCRDMA_UVERBS(MODIFY_AH) |
 142              OCRDMA_UVERBS(QUERY_AH) |
 143              OCRDMA_UVERBS(DESTROY_AH);
 144
 145         dev->ibdev.node_type = RDMA_NODE_IB_CA;
 146         dev->ibdev.phys_port_cnt = 1;
 147         dev->ibdev.num_comp_vectors = dev->eq_cnt;
 148
 149         /* mandatory verbs. */
 150         dev->ibdev.query_device = ocrdma_query_device;
 151         dev->ibdev.query_port = ocrdma_query_port;
 152         dev->ibdev.modify_port = ocrdma_modify_port;
 153         dev->ibdev.query_gid = ocrdma_query_gid;
 154         dev->ibdev.get_netdev = ocrdma_get_netdev;
 155         dev->ibdev.add_gid = ocrdma_add_gid;
 156         dev->ibdev.del_gid = ocrdma_del_gid;
 157         dev->ibdev.get_link_layer = ocrdma_link_layer;
 158         dev->ibdev.alloc_pd = ocrdma_alloc_pd;
 159         dev->ibdev.dealloc_pd = ocrdma_dealloc_pd;
 160
 161         dev->ibdev.create_cq = ocrdma_create_cq;
 162         dev->ibdev.destroy_cq = ocrdma_destroy_cq;
 163         dev->ibdev.resize_cq = ocrdma_resize_cq;
 164
 165         dev->ibdev.create_qp = ocrdma_create_qp;
 166         dev->ibdev.modify_qp = ocrdma_modify_qp;
 167         dev->ibdev.query_qp = ocrdma_query_qp;
 168         dev->ibdev.destroy_qp = ocrdma_destroy_qp;
 169
 170         dev->ibdev.query_pkey = ocrdma_query_pkey;
 171         dev->ibdev.create_ah = ocrdma_create_ah;
 172         dev->ibdev.destroy_ah = ocrdma_destroy_ah;
 173         dev->ibdev.query_ah = ocrdma_query_ah;
 174         dev->ibdev.modify_ah = ocrdma_modify_ah;
 175
 176         dev->ibdev.poll_cq = ocrdma_poll_cq;
 177         dev->ibdev.post_send = ocrdma_post_send;
 178         dev->ibdev.post_recv = ocrdma_post_recv;
 179         dev->ibdev.req_notify_cq = ocrdma_arm_cq;
 180
 181         dev->ibdev.get_dma_mr = ocrdma_get_dma_mr;
 182         dev->ibdev.dereg_mr = ocrdma_dereg_mr;
 183         dev->ibdev.reg_user_mr = ocrdma_reg_user_mr;
 184
 185         dev->ibdev.alloc_mr = ocrdma_alloc_mr;
 186         dev->ibdev.map_mr_sg = ocrdma_map_mr_sg;
 187
 188         /* mandatory to support user space verbs consumer. */
 189         dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext;
 190         dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext;
 191         dev->ibdev.mmap = ocrdma_mmap;
 192         dev->ibdev.dma_device = &dev->nic_info.pdev->dev;
 193
 194         dev->ibdev.process_mad = ocrdma_process_mad;
 195         dev->ibdev.get_port_immutable = ocrdma_port_immutable;
 196
 197         if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
 198                 dev->ibdev.uverbs_cmd_mask |=
 199                      OCRDMA_UVERBS(CREATE_SRQ) |
 200                      OCRDMA_UVERBS(MODIFY_SRQ) |
 201                      OCRDMA_UVERBS(QUERY_SRQ) |
 202                      OCRDMA_UVERBS(DESTROY_SRQ) |
 203                      OCRDMA_UVERBS(POST_SRQ_RECV);
 204
 205                 dev->ibdev.create_srq = ocrdma_create_srq;
 206                 dev->ibdev.modify_srq = ocrdma_modify_srq;
 207                 dev->ibdev.query_srq = ocrdma_query_srq;
 208                 dev->ibdev.destroy_srq = ocrdma_destroy_srq;
 209                 dev->ibdev.post_srq_recv = ocrdma_post_srq_recv;
 210         }
 211         return ib_register_device(&dev->ibdev, NULL);
 212 }
 213
 214 static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
 215 {
 216         mutex_init(&dev->dev_lock);
 217         dev->cq_tbl = kzalloc(sizeof(struct ocrdma_cq *) *
 218                               OCRDMA_MAX_CQ, GFP_KERNEL);
 219         if (!dev->cq_tbl)
 220                 goto alloc_err;
 221
 222         if (dev->attr.max_qp) {
 223                 dev->qp_tbl = kzalloc(sizeof(struct ocrdma_qp *) *
 224                                       OCRDMA_MAX_QP, GFP_KERNEL);
 225                 if (!dev->qp_tbl)
 226                         goto alloc_err;
 227         }
 228
 229         dev->stag_arr = kzalloc(sizeof(u64) * OCRDMA_MAX_STAG, GFP_KERNEL);
 230         if (dev->stag_arr == NULL)
 231                 goto alloc_err;
 232
 233         ocrdma_alloc_pd_pool(dev);
 234
 235         if (!ocrdma_alloc_stats_resources(dev)) {
 236                 pr_err("%s: stats resource allocation failed\n", __func__);
 237                 goto alloc_err;
 238         }
 239
 240         spin_lock_init(&dev->av_tbl.lock);
 241         spin_lock_init(&dev->flush_q_lock);
 242         return 0;
 243 alloc_err:
 244         pr_err("%s(%d) error.\n", __func__, dev->id);
 245         return -ENOMEM;
 246 }
 247
 248 static void ocrdma_free_resources(struct ocrdma_dev *dev)
 249 {
 250         ocrdma_release_stats_resources(dev);
 251         kfree(dev->stag_arr);
 252         kfree(dev->qp_tbl);
 253         kfree(dev->cq_tbl);
 254 }
 255
 256 /* OCRDMA sysfs interface */
 257 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
 258                         char *buf)
 259 {
 260         struct ocrdma_dev *dev = dev_get_drvdata(device);
 261
 262         return scnprintf(buf, PAGE_SIZE, "0x%x\n", dev->nic_info.pdev->vendor);
 263 }
 264
 265 static ssize_t show_fw_ver(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, "%s\n", &dev->attr.fw_ver[0]);
 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(fw_ver, S_IRUGO, show_fw_ver, NULL);
 283 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca_type, NULL);
 284
 285 static struct device_attribute *ocrdma_attributes[] = {
 286         &dev_attr_hw_rev,
 287         &dev_attr_fw_ver,
 288         &dev_attr_hca_type
 289 };
 290
 291 static void ocrdma_remove_sysfiles(struct ocrdma_dev *dev)
 292 {
 293         int i;
 294
 295         for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++)
 296                 device_remove_file(&dev->ibdev.dev, ocrdma_attributes[i]);
 297 }
 298
 299 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
 300 {
 301         int status = 0, i;
 302         u8 lstate = 0;
 303         struct ocrdma_dev *dev;
 304
 305         dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev));
 306         if (!dev) {
 307                 pr_err("Unable to allocate ib device\n");
 308                 return NULL;
 309         }
 310         dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
 311         if (!dev->mbx_cmd)
 312                 goto idr_err;
 313
 314         memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
 315         dev->id = idr_alloc(&ocrdma_dev_id, NULL, 0, 0, GFP_KERNEL);
 316         if (dev->id < 0)
 317                 goto idr_err;
 318
 319         status = ocrdma_init_hw(dev);
 320         if (status)
 321                 goto init_err;
 322
 323         status = ocrdma_alloc_resources(dev);
 324         if (status)
 325                 goto alloc_err;
 326
 327         ocrdma_init_service_level(dev);
 328         status = ocrdma_register_device(dev);
 329         if (status)
 330                 goto alloc_err;
 331
 332         /* Query Link state and update */
 333         status = ocrdma_mbx_get_link_speed(dev, NULL, &lstate);
 334         if (!status)
 335                 ocrdma_update_link_state(dev, lstate);
 336
 337         for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++)
 338                 if (device_create_file(&dev->ibdev.dev, ocrdma_attributes[i]))
 339                         goto sysfs_err;
 340         /* Init stats */
 341         ocrdma_add_port_stats(dev);
 342         /* Interrupt Moderation */
 343         INIT_DELAYED_WORK(&dev->eqd_work, ocrdma_eqd_set_task);
 344         schedule_delayed_work(&dev->eqd_work, msecs_to_jiffies(1000));
 345
 346         pr_info("%s %s: %s \"%s\" port %d\n",
 347                 dev_name(&dev->nic_info.pdev->dev), hca_name(dev),
 348                 port_speed_string(dev), dev->model_number,
 349                 dev->hba_port_num);
 350         pr_info("%s ocrdma%d driver loaded successfully\n",
 351                 dev_name(&dev->nic_info.pdev->dev), dev->id);
 352         return dev;
 353
 354 sysfs_err:
 355         ocrdma_remove_sysfiles(dev);
 356 alloc_err:
 357         ocrdma_free_resources(dev);
 358         ocrdma_cleanup_hw(dev);
 359 init_err:
 360         idr_remove(&ocrdma_dev_id, dev->id);
 361 idr_err:
 362         kfree(dev->mbx_cmd);
 363         ib_dealloc_device(&dev->ibdev);
 364         pr_err("%s() leaving. ret=%d\n", __func__, status);
 365         return NULL;
 366 }
 367
 368 static void ocrdma_remove_free(struct ocrdma_dev *dev)
 369 {
 370
 371         idr_remove(&ocrdma_dev_id, dev->id);
 372         kfree(dev->mbx_cmd);
 373         ib_dealloc_device(&dev->ibdev);
 374 }
 375
 376 static void ocrdma_remove(struct ocrdma_dev *dev)
 377 {
 378         /* first unregister with stack to stop all the active traffic
 379          * of the registered clients.
 380          */
 381         cancel_delayed_work_sync(&dev->eqd_work);
 382         ocrdma_remove_sysfiles(dev);
 383         ib_unregister_device(&dev->ibdev);
 384
 385         ocrdma_rem_port_stats(dev);
 386         ocrdma_free_resources(dev);
 387         ocrdma_cleanup_hw(dev);
 388         ocrdma_remove_free(dev);
 389 }
 390
 391 static int ocrdma_dispatch_port_active(struct ocrdma_dev *dev)
 392 {
 393         struct ib_event port_event;
 394
 395         port_event.event = IB_EVENT_PORT_ACTIVE;
 396         port_event.element.port_num = 1;
 397         port_event.device = &dev->ibdev;
 398         ib_dispatch_event(&port_event);
 399         return 0;
 400 }
 401
 402 static int ocrdma_dispatch_port_error(struct ocrdma_dev *dev)
 403 {
 404         struct ib_event err_event;
 405
 406         err_event.event = IB_EVENT_PORT_ERR;
 407         err_event.element.port_num = 1;
 408         err_event.device = &dev->ibdev;
 409         ib_dispatch_event(&err_event);
 410         return 0;
 411 }
 412
 413 static void ocrdma_shutdown(struct ocrdma_dev *dev)
 414 {
 415         ocrdma_dispatch_port_error(dev);
 416         ocrdma_remove(dev);
 417 }
 418
 419 /* event handling via NIC driver ensures that all the NIC specific
 420  * initialization done before RoCE driver notifies
 421  * event to stack.
 422  */
 423 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
 424 {
 425         switch (event) {
 426         case BE_DEV_SHUTDOWN:
 427                 ocrdma_shutdown(dev);
 428                 break;
 429         default:
 430                 break;
 431         }
 432 }
 433
 434 void ocrdma_update_link_state(struct ocrdma_dev *dev, u8 lstate)
 435 {
 436         if (!(dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)) {
 437                 dev->flags |= OCRDMA_FLAGS_LINK_STATUS_INIT;
 438                 if (!lstate)
 439                         return;
 440         }
 441
 442         if (!lstate)
 443                 ocrdma_dispatch_port_error(dev);
 444         else
 445                 ocrdma_dispatch_port_active(dev);
 446 }
 447
 448 static struct ocrdma_driver ocrdma_drv = {
 449         .name                   = "ocrdma_driver",
 450         .add                    = ocrdma_add,
 451         .remove                 = ocrdma_remove,
 452         .state_change_handler   = ocrdma_event_handler,
 453         .be_abi_version         = OCRDMA_BE_ROCE_ABI_VERSION,
 454 };
 455
 456 static int __init ocrdma_init_module(void)
 457 {
 458         int status;
 459
 460         ocrdma_init_debugfs();
 461
 462         status = be_roce_register_driver(&ocrdma_drv);
 463         if (status)
 464                 goto err_be_reg;
 465
 466         return 0;
 467
 468 err_be_reg:
 469
 470         return status;
 471 }
 472
 473 static void __exit ocrdma_exit_module(void)
 474 {
 475         be_roce_unregister_driver(&ocrdma_drv);
 476         ocrdma_rem_debugfs();
 477         idr_destroy(&ocrdma_dev_id);
 478 }
 479
 480 module_init(ocrdma_init_module);
 481 module_exit(ocrdma_exit_module);