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 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);