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 static int ocrdma_register_device(struct ocrdma_dev *dev)
 118 {
 119         strlcpy(dev->ibdev.name, "ocrdma%d", IB_DEVICE_NAME_MAX);
 120         ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid);
 121         BUILD_BUG_ON(sizeof(OCRDMA_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX);
 122         memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
 123                sizeof(OCRDMA_NODE_DESC));
 124         dev->ibdev.owner = THIS_MODULE;
 125         dev->ibdev.uverbs_abi_ver = OCRDMA_ABI_VERSION;
 126         dev->ibdev.uverbs_cmd_mask =
 127             OCRDMA_UVERBS(GET_CONTEXT) |
 128             OCRDMA_UVERBS(QUERY_DEVICE) |
 129             OCRDMA_UVERBS(QUERY_PORT) |
 130             OCRDMA_UVERBS(ALLOC_PD) |
 131             OCRDMA_UVERBS(DEALLOC_PD) |
 132             OCRDMA_UVERBS(REG_MR) |
 133             OCRDMA_UVERBS(DEREG_MR) |
 134             OCRDMA_UVERBS(CREATE_COMP_CHANNEL) |
 135             OCRDMA_UVERBS(CREATE_CQ) |
 136             OCRDMA_UVERBS(RESIZE_CQ) |
 137             OCRDMA_UVERBS(DESTROY_CQ) |
 138             OCRDMA_UVERBS(REQ_NOTIFY_CQ) |
 139             OCRDMA_UVERBS(CREATE_QP) |
 140             OCRDMA_UVERBS(MODIFY_QP) |
 141             OCRDMA_UVERBS(QUERY_QP) |
 142             OCRDMA_UVERBS(DESTROY_QP) |
 143             OCRDMA_UVERBS(POLL_CQ) |
 144             OCRDMA_UVERBS(POST_SEND) |
 145             OCRDMA_UVERBS(POST_RECV);
 146
 147         dev->ibdev.uverbs_cmd_mask |=
 148             OCRDMA_UVERBS(CREATE_AH) |
 149              OCRDMA_UVERBS(MODIFY_AH) |
 150              OCRDMA_UVERBS(QUERY_AH) |
 151              OCRDMA_UVERBS(DESTROY_AH);
 152
 153         dev->ibdev.node_type = RDMA_NODE_IB_CA;
 154         dev->ibdev.phys_port_cnt = 1;
 155         dev->ibdev.num_comp_vectors = dev->eq_cnt;
 156
 157         /* mandatory verbs. */
 158         dev->ibdev.query_device = ocrdma_query_device;
 159         dev->ibdev.query_port = ocrdma_query_port;
 160         dev->ibdev.modify_port = ocrdma_modify_port;
 161         dev->ibdev.get_netdev = ocrdma_get_netdev;
 162         dev->ibdev.get_link_layer = ocrdma_link_layer;
 163         dev->ibdev.alloc_pd = ocrdma_alloc_pd;
 164         dev->ibdev.dealloc_pd = ocrdma_dealloc_pd;
 165
 166         dev->ibdev.create_cq = ocrdma_create_cq;
 167         dev->ibdev.destroy_cq = ocrdma_destroy_cq;
 168         dev->ibdev.resize_cq = ocrdma_resize_cq;
 169
 170         dev->ibdev.create_qp = ocrdma_create_qp;
 171         dev->ibdev.modify_qp = ocrdma_modify_qp;
 172         dev->ibdev.query_qp = ocrdma_query_qp;
 173         dev->ibdev.destroy_qp = ocrdma_destroy_qp;
 174
 175         dev->ibdev.query_pkey = ocrdma_query_pkey;
 176         dev->ibdev.create_ah = ocrdma_create_ah;
 177         dev->ibdev.destroy_ah = ocrdma_destroy_ah;
 178         dev->ibdev.query_ah = ocrdma_query_ah;
 179
 180         dev->ibdev.poll_cq = ocrdma_poll_cq;
 181         dev->ibdev.post_send = ocrdma_post_send;
 182         dev->ibdev.post_recv = ocrdma_post_recv;
 183         dev->ibdev.req_notify_cq = ocrdma_arm_cq;
 184
 185         dev->ibdev.get_dma_mr = ocrdma_get_dma_mr;
 186         dev->ibdev.dereg_mr = ocrdma_dereg_mr;
 187         dev->ibdev.reg_user_mr = ocrdma_reg_user_mr;
 188
 189         dev->ibdev.alloc_mr = ocrdma_alloc_mr;
 190         dev->ibdev.map_mr_sg = ocrdma_map_mr_sg;
 191
 192         /* mandatory to support user space verbs consumer. */
 193         dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext;
 194         dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext;
 195         dev->ibdev.mmap = ocrdma_mmap;
 196         dev->ibdev.dev.parent = &dev->nic_info.pdev->dev;
 197
 198         dev->ibdev.process_mad = ocrdma_process_mad;
 199         dev->ibdev.get_port_immutable = ocrdma_port_immutable;
 200         dev->ibdev.get_dev_fw_str     = get_dev_fw_str;
 201
 202         if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
 203                 dev->ibdev.uverbs_cmd_mask |=
 204                      OCRDMA_UVERBS(CREATE_SRQ) |
 205                      OCRDMA_UVERBS(MODIFY_SRQ) |
 206                      OCRDMA_UVERBS(QUERY_SRQ) |
 207                      OCRDMA_UVERBS(DESTROY_SRQ) |
 208                      OCRDMA_UVERBS(POST_SRQ_RECV);
 209
 210                 dev->ibdev.create_srq = ocrdma_create_srq;
 211                 dev->ibdev.modify_srq = ocrdma_modify_srq;
 212                 dev->ibdev.query_srq = ocrdma_query_srq;
 213                 dev->ibdev.destroy_srq = ocrdma_destroy_srq;
 214                 dev->ibdev.post_srq_recv = ocrdma_post_srq_recv;
 215         }
 216         dev->ibdev.driver_id = RDMA_DRIVER_OCRDMA;
 217         return ib_register_device(&dev->ibdev, NULL);
 218 }
 219
 220 static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
 221 {
 222         mutex_init(&dev->dev_lock);
 223         dev->cq_tbl = kcalloc(OCRDMA_MAX_CQ, sizeof(struct ocrdma_cq *),
 224                               GFP_KERNEL);
 225         if (!dev->cq_tbl)
 226                 goto alloc_err;
 227
 228         if (dev->attr.max_qp) {
 229                 dev->qp_tbl = kcalloc(OCRDMA_MAX_QP,
 230                                       sizeof(struct ocrdma_qp *),
 231                                       GFP_KERNEL);
 232                 if (!dev->qp_tbl)
 233                         goto alloc_err;
 234         }
 235
 236         dev->stag_arr = kcalloc(OCRDMA_MAX_STAG, sizeof(u64), GFP_KERNEL);
 237         if (dev->stag_arr == NULL)
 238                 goto alloc_err;
 239
 240         ocrdma_alloc_pd_pool(dev);
 241
 242         if (!ocrdma_alloc_stats_resources(dev)) {
 243                 pr_err("%s: stats resource allocation failed\n", __func__);
 244                 goto alloc_err;
 245         }
 246
 247         spin_lock_init(&dev->av_tbl.lock);
 248         spin_lock_init(&dev->flush_q_lock);
 249         return 0;
 250 alloc_err:
 251         pr_err("%s(%d) error.\n", __func__, dev->id);
 252         return -ENOMEM;
 253 }
 254
 255 static void ocrdma_free_resources(struct ocrdma_dev *dev)
 256 {
 257         ocrdma_release_stats_resources(dev);
 258         kfree(dev->stag_arr);
 259         kfree(dev->qp_tbl);
 260         kfree(dev->cq_tbl);
 261 }
 262
 263 /* OCRDMA sysfs interface */
 264 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
 265                         char *buf)
 266 {
 267         struct ocrdma_dev *dev = dev_get_drvdata(device);
 268
 269         return scnprintf(buf, PAGE_SIZE, "0x%x\n", dev->nic_info.pdev->vendor);
 270 }
 271
 272 static ssize_t show_hca_type(struct device *device,
 273                              struct device_attribute *attr, char *buf)
 274 {
 275         struct ocrdma_dev *dev = dev_get_drvdata(device);
 276
 277         return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->model_number[0]);
 278 }
 279
 280 static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
 281 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca_type, NULL);
 282
 283 static struct device_attribute *ocrdma_attributes[] = {
 284         &dev_attr_hw_rev,
 285         &dev_attr_hca_type
 286 };
 287
 288 static void ocrdma_remove_sysfiles(struct ocrdma_dev *dev)
 289 {
 290         int i;
 291
 292         for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++)
 293                 device_remove_file(&dev->ibdev.dev, ocrdma_attributes[i]);
 294 }
 295
 296 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
 297 {
 298         int status = 0, i;
 299         u8 lstate = 0;
 300         struct ocrdma_dev *dev;
 301
 302         dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev));
 303         if (!dev) {
 304                 pr_err("Unable to allocate ib device\n");
 305                 return NULL;
 306         }
 307         dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
 308         if (!dev->mbx_cmd)
 309                 goto idr_err;
 310
 311         memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
 312         dev->id = idr_alloc(&ocrdma_dev_id, NULL, 0, 0, GFP_KERNEL);
 313         if (dev->id < 0)
 314                 goto idr_err;
 315
 316         status = ocrdma_init_hw(dev);
 317         if (status)
 318                 goto init_err;
 319
 320         status = ocrdma_alloc_resources(dev);
 321         if (status)
 322                 goto alloc_err;
 323
 324         ocrdma_init_service_level(dev);
 325         status = ocrdma_register_device(dev);
 326         if (status)
 327                 goto alloc_err;
 328
 329         /* Query Link state and update */
 330         status = ocrdma_mbx_get_link_speed(dev, NULL, &lstate);
 331         if (!status)
 332                 ocrdma_update_link_state(dev, lstate);
 333
 334         for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++)
 335                 if (device_create_file(&dev->ibdev.dev, ocrdma_attributes[i]))
 336                         goto sysfs_err;
 337         /* Init stats */
 338         ocrdma_add_port_stats(dev);
 339         /* Interrupt Moderation */
 340         INIT_DELAYED_WORK(&dev->eqd_work, ocrdma_eqd_set_task);
 341         schedule_delayed_work(&dev->eqd_work, msecs_to_jiffies(1000));
 342
 343         pr_info("%s %s: %s \"%s\" port %d\n",
 344                 dev_name(&dev->nic_info.pdev->dev), hca_name(dev),
 345                 port_speed_string(dev), dev->model_number,
 346                 dev->hba_port_num);
 347         pr_info("%s ocrdma%d driver loaded successfully\n",
 348                 dev_name(&dev->nic_info.pdev->dev), dev->id);
 349         return dev;
 350
 351 sysfs_err:
 352         ocrdma_remove_sysfiles(dev);
 353 alloc_err:
 354         ocrdma_free_resources(dev);
 355         ocrdma_cleanup_hw(dev);
 356 init_err:
 357         idr_remove(&ocrdma_dev_id, dev->id);
 358 idr_err:
 359         kfree(dev->mbx_cmd);
 360         ib_dealloc_device(&dev->ibdev);
 361         pr_err("%s() leaving. ret=%d\n", __func__, status);
 362         return NULL;
 363 }
 364
 365 static void ocrdma_remove_free(struct ocrdma_dev *dev)
 366 {
 367
 368         idr_remove(&ocrdma_dev_id, dev->id);
 369         kfree(dev->mbx_cmd);
 370         ib_dealloc_device(&dev->ibdev);
 371 }
 372
 373 static void ocrdma_remove(struct ocrdma_dev *dev)
 374 {
 375         /* first unregister with stack to stop all the active traffic
 376          * of the registered clients.
 377          */
 378         cancel_delayed_work_sync(&dev->eqd_work);
 379         ocrdma_remove_sysfiles(dev);
 380         ib_unregister_device(&dev->ibdev);
 381
 382         ocrdma_rem_port_stats(dev);
 383         ocrdma_free_resources(dev);
 384         ocrdma_cleanup_hw(dev);
 385         ocrdma_remove_free(dev);
 386 }
 387
 388 static int ocrdma_dispatch_port_active(struct ocrdma_dev *dev)
 389 {
 390         struct ib_event port_event;
 391
 392         port_event.event = IB_EVENT_PORT_ACTIVE;
 393         port_event.element.port_num = 1;
 394         port_event.device = &dev->ibdev;
 395         ib_dispatch_event(&port_event);
 396         return 0;
 397 }
 398
 399 static int ocrdma_dispatch_port_error(struct ocrdma_dev *dev)
 400 {
 401         struct ib_event err_event;
 402
 403         err_event.event = IB_EVENT_PORT_ERR;
 404         err_event.element.port_num = 1;
 405         err_event.device = &dev->ibdev;
 406         ib_dispatch_event(&err_event);
 407         return 0;
 408 }
 409
 410 static void ocrdma_shutdown(struct ocrdma_dev *dev)
 411 {
 412         ocrdma_dispatch_port_error(dev);
 413         ocrdma_remove(dev);
 414 }
 415
 416 /* event handling via NIC driver ensures that all the NIC specific
 417  * initialization done before RoCE driver notifies
 418  * event to stack.
 419  */
 420 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
 421 {
 422         switch (event) {
 423         case BE_DEV_SHUTDOWN:
 424                 ocrdma_shutdown(dev);
 425                 break;
 426         default:
 427                 break;
 428         }
 429 }
 430
 431 void ocrdma_update_link_state(struct ocrdma_dev *dev, u8 lstate)
 432 {
 433         if (!(dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)) {
 434                 dev->flags |= OCRDMA_FLAGS_LINK_STATUS_INIT;
 435                 if (!lstate)
 436                         return;
 437         }
 438
 439         if (!lstate)
 440                 ocrdma_dispatch_port_error(dev);
 441         else
 442                 ocrdma_dispatch_port_active(dev);
 443 }
 444
 445 static struct ocrdma_driver ocrdma_drv = {
 446         .name                   = "ocrdma_driver",
 447         .add                    = ocrdma_add,
 448         .remove                 = ocrdma_remove,
 449         .state_change_handler   = ocrdma_event_handler,
 450         .be_abi_version         = OCRDMA_BE_ROCE_ABI_VERSION,
 451 };
 452
 453 static int __init ocrdma_init_module(void)
 454 {
 455         int status;
 456
 457         ocrdma_init_debugfs();
 458
 459         status = be_roce_register_driver(&ocrdma_drv);
 460         if (status)
 461                 goto err_be_reg;
 462
 463         return 0;
 464
 465 err_be_reg:
 466
 467         return status;
 468 }
 469
 470 static void __exit ocrdma_exit_module(void)
 471 {
 472         be_roce_unregister_driver(&ocrdma_drv);
 473         ocrdma_rem_debugfs();
 474         idr_destroy(&ocrdma_dev_id);
 475 }
 476
 477 module_init(ocrdma_init_module);
 478 module_exit(ocrdma_exit_module);