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