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 void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid)
  66 {
  67         u8 mac_addr[6];
  68
  69         memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
  70         guid[0] = mac_addr[0] ^ 2;
  71         guid[1] = mac_addr[1];
  72         guid[2] = mac_addr[2];
  73         guid[3] = 0xff;
  74         guid[4] = 0xfe;
  75         guid[5] = mac_addr[3];
  76         guid[6] = mac_addr[4];
  77         guid[7] = mac_addr[5];
  78 }
  79 static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
  80                                               u32 port_num)
  81 {
  82         return IB_LINK_LAYER_ETHERNET;
  83 }
  84
  85 static int ocrdma_port_immutable(struct ib_device *ibdev, u32 port_num,
  86                                  struct ib_port_immutable *immutable)
  87 {
  88         struct ib_port_attr attr;
  89         struct ocrdma_dev *dev;
  90         int err;
  91
  92         dev = get_ocrdma_dev(ibdev);
  93         immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE;
  94         if (ocrdma_is_udp_encap_supported(dev))
  95                 immutable->core_cap_flags |= RDMA_CORE_CAP_PROT_ROCE_UDP_ENCAP;
  96
  97         err = ib_query_port(ibdev, port_num, &attr);
  98         if (err)
  99                 return err;
 100
 101         immutable->pkey_tbl_len = attr.pkey_tbl_len;
 102         immutable->gid_tbl_len = attr.gid_tbl_len;
 103         immutable->max_mad_size = IB_MGMT_MAD_SIZE;
 104
 105         return 0;
 106 }
 107
 108 static void get_dev_fw_str(struct ib_device *device, char *str)
 109 {
 110         struct ocrdma_dev *dev = get_ocrdma_dev(device);
 111
 112         snprintf(str, IB_FW_VERSION_NAME_MAX, "%s", &dev->attr.fw_ver[0]);
 113 }
 114
 115 /* OCRDMA sysfs interface */
 116 static ssize_t hw_rev_show(struct device *device,
 117                            struct device_attribute *attr, char *buf)
 118 {
 119         struct ocrdma_dev *dev =
 120                 rdma_device_to_drv_device(device, struct ocrdma_dev, ibdev);
 121
 122         return sysfs_emit(buf, "0x%x\n", dev->nic_info.pdev->vendor);
 123 }
 124 static DEVICE_ATTR_RO(hw_rev);
 125
 126 static ssize_t hca_type_show(struct device *device,
 127                              struct device_attribute *attr, char *buf)
 128 {
 129         struct ocrdma_dev *dev =
 130                 rdma_device_to_drv_device(device, struct ocrdma_dev, ibdev);
 131
 132         return sysfs_emit(buf, "%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         .owner = THIS_MODULE,
 148         .driver_id = RDMA_DRIVER_OCRDMA,
 149         .uverbs_abi_ver = OCRDMA_ABI_VERSION,
 150
 151         .alloc_mr = ocrdma_alloc_mr,
 152         .alloc_pd = ocrdma_alloc_pd,
 153         .alloc_ucontext = ocrdma_alloc_ucontext,
 154         .create_ah = ocrdma_create_ah,
 155         .create_cq = ocrdma_create_cq,
 156         .create_qp = ocrdma_create_qp,
 157         .create_user_ah = ocrdma_create_ah,
 158         .dealloc_pd = ocrdma_dealloc_pd,
 159         .dealloc_ucontext = ocrdma_dealloc_ucontext,
 160         .dereg_mr = ocrdma_dereg_mr,
 161         .destroy_ah = ocrdma_destroy_ah,
 162         .destroy_cq = ocrdma_destroy_cq,
 163         .destroy_qp = ocrdma_destroy_qp,
 164         .device_group = &ocrdma_attr_group,
 165         .get_dev_fw_str = get_dev_fw_str,
 166         .get_dma_mr = ocrdma_get_dma_mr,
 167         .get_link_layer = ocrdma_link_layer,
 168         .get_port_immutable = ocrdma_port_immutable,
 169         .map_mr_sg = ocrdma_map_mr_sg,
 170         .mmap = ocrdma_mmap,
 171         .modify_qp = ocrdma_modify_qp,
 172         .poll_cq = ocrdma_poll_cq,
 173         .post_recv = ocrdma_post_recv,
 174         .post_send = ocrdma_post_send,
 175         .process_mad = ocrdma_process_mad,
 176         .query_ah = ocrdma_query_ah,
 177         .query_device = ocrdma_query_device,
 178         .query_pkey = ocrdma_query_pkey,
 179         .query_port = ocrdma_query_port,
 180         .query_qp = ocrdma_query_qp,
 181         .reg_user_mr = ocrdma_reg_user_mr,
 182         .req_notify_cq = ocrdma_arm_cq,
 183         .resize_cq = ocrdma_resize_cq,
 184
 185         INIT_RDMA_OBJ_SIZE(ib_ah, ocrdma_ah, ibah),
 186         INIT_RDMA_OBJ_SIZE(ib_cq, ocrdma_cq, ibcq),
 187         INIT_RDMA_OBJ_SIZE(ib_pd, ocrdma_pd, ibpd),
 188         INIT_RDMA_OBJ_SIZE(ib_qp, ocrdma_qp, ibqp),
 189         INIT_RDMA_OBJ_SIZE(ib_ucontext, ocrdma_ucontext, ibucontext),
 190 };
 191
 192 static const struct ib_device_ops ocrdma_dev_srq_ops = {
 193         .create_srq = ocrdma_create_srq,
 194         .destroy_srq = ocrdma_destroy_srq,
 195         .modify_srq = ocrdma_modify_srq,
 196         .post_srq_recv = ocrdma_post_srq_recv,
 197         .query_srq = ocrdma_query_srq,
 198
 199         INIT_RDMA_OBJ_SIZE(ib_srq, ocrdma_srq, ibsrq),
 200 };
 201
 202 static int ocrdma_register_device(struct ocrdma_dev *dev)
 203 {
 204         int ret;
 205
 206         ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid);
 207         BUILD_BUG_ON(sizeof(OCRDMA_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX);
 208         memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
 209                sizeof(OCRDMA_NODE_DESC));
 210
 211         dev->ibdev.node_type = RDMA_NODE_IB_CA;
 212         dev->ibdev.phys_port_cnt = 1;
 213         dev->ibdev.num_comp_vectors = dev->eq_cnt;
 214
 215         /* mandatory to support user space verbs consumer. */
 216         dev->ibdev.dev.parent = &dev->nic_info.pdev->dev;
 217
 218         ib_set_device_ops(&dev->ibdev, &ocrdma_dev_ops);
 219
 220         if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R)
 221                 ib_set_device_ops(&dev->ibdev, &ocrdma_dev_srq_ops);
 222
 223         ret = ib_device_set_netdev(&dev->ibdev, dev->nic_info.netdev, 1);
 224         if (ret)
 225                 return ret;
 226
 227         dma_set_max_seg_size(&dev->nic_info.pdev->dev, UINT_MAX);
 228         return ib_register_device(&dev->ibdev, "ocrdma%d",
 229                                   &dev->nic_info.pdev->dev);
 230 }
 231
 232 static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
 233 {
 234         mutex_init(&dev->dev_lock);
 235         dev->cq_tbl = kcalloc(OCRDMA_MAX_CQ, sizeof(struct ocrdma_cq *),
 236                               GFP_KERNEL);
 237         if (!dev->cq_tbl)
 238                 goto alloc_err;
 239
 240         if (dev->attr.max_qp) {
 241                 dev->qp_tbl = kcalloc(OCRDMA_MAX_QP,
 242                                       sizeof(struct ocrdma_qp *),
 243                                       GFP_KERNEL);
 244                 if (!dev->qp_tbl)
 245                         goto alloc_err;
 246         }
 247
 248         dev->stag_arr = kcalloc(OCRDMA_MAX_STAG, sizeof(u64), GFP_KERNEL);
 249         if (dev->stag_arr == NULL)
 250                 goto alloc_err;
 251
 252         ocrdma_alloc_pd_pool(dev);
 253
 254         if (!ocrdma_alloc_stats_resources(dev)) {
 255                 pr_err("%s: stats resource allocation failed\n", __func__);
 256                 goto alloc_err;
 257         }
 258
 259         spin_lock_init(&dev->av_tbl.lock);
 260         spin_lock_init(&dev->flush_q_lock);
 261         return 0;
 262 alloc_err:
 263         pr_err("%s(%d) error.\n", __func__, dev->id);
 264         return -ENOMEM;
 265 }
 266
 267 static void ocrdma_free_resources(struct ocrdma_dev *dev)
 268 {
 269         ocrdma_release_stats_resources(dev);
 270         kfree(dev->stag_arr);
 271         kfree(dev->qp_tbl);
 272         kfree(dev->cq_tbl);
 273 }
 274
 275 static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
 276 {
 277         int status = 0;
 278         u8 lstate = 0;
 279         struct ocrdma_dev *dev;
 280
 281         dev = ib_alloc_device(ocrdma_dev, ibdev);
 282         if (!dev) {
 283                 pr_err("Unable to allocate ib device\n");
 284                 return NULL;
 285         }
 286
 287         dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
 288         if (!dev->mbx_cmd)
 289                 goto init_err;
 290
 291         memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
 292         dev->id = PCI_FUNC(dev->nic_info.pdev->devfn);
 293         status = ocrdma_init_hw(dev);
 294         if (status)
 295                 goto init_err;
 296
 297         status = ocrdma_alloc_resources(dev);
 298         if (status)
 299                 goto alloc_err;
 300
 301         ocrdma_init_service_level(dev);
 302         status = ocrdma_register_device(dev);
 303         if (status)
 304                 goto alloc_err;
 305
 306         /* Query Link state and update */
 307         status = ocrdma_mbx_get_link_speed(dev, NULL, &lstate);
 308         if (!status)
 309                 ocrdma_update_link_state(dev, lstate);
 310
 311         /* Init stats */
 312         ocrdma_add_port_stats(dev);
 313         /* Interrupt Moderation */
 314         INIT_DELAYED_WORK(&dev->eqd_work, ocrdma_eqd_set_task);
 315         schedule_delayed_work(&dev->eqd_work, msecs_to_jiffies(1000));
 316
 317         pr_info("%s %s: %s \"%s\" port %d\n",
 318                 dev_name(&dev->nic_info.pdev->dev), hca_name(dev),
 319                 port_speed_string(dev), dev->model_number,
 320                 dev->hba_port_num);
 321         pr_info("%s ocrdma%d driver loaded successfully\n",
 322                 dev_name(&dev->nic_info.pdev->dev), dev->id);
 323         return dev;
 324
 325 alloc_err:
 326         ocrdma_free_resources(dev);
 327         ocrdma_cleanup_hw(dev);
 328 init_err:
 329         kfree(dev->mbx_cmd);
 330         ib_dealloc_device(&dev->ibdev);
 331         pr_err("%s() leaving. ret=%d\n", __func__, status);
 332         return NULL;
 333 }
 334
 335 static void ocrdma_remove_free(struct ocrdma_dev *dev)
 336 {
 337
 338         kfree(dev->mbx_cmd);
 339         ib_dealloc_device(&dev->ibdev);
 340 }
 341
 342 static void ocrdma_remove(struct ocrdma_dev *dev)
 343 {
 344         /* first unregister with stack to stop all the active traffic
 345          * of the registered clients.
 346          */
 347         cancel_delayed_work_sync(&dev->eqd_work);
 348         ib_unregister_device(&dev->ibdev);
 349
 350         ocrdma_rem_port_stats(dev);
 351         ocrdma_free_resources(dev);
 352         ocrdma_cleanup_hw(dev);
 353         ocrdma_remove_free(dev);
 354 }
 355
 356 static int ocrdma_dispatch_port_active(struct ocrdma_dev *dev)
 357 {
 358         struct ib_event port_event;
 359
 360         port_event.event = IB_EVENT_PORT_ACTIVE;
 361         port_event.element.port_num = 1;
 362         port_event.device = &dev->ibdev;
 363         ib_dispatch_event(&port_event);
 364         return 0;
 365 }
 366
 367 static int ocrdma_dispatch_port_error(struct ocrdma_dev *dev)
 368 {
 369         struct ib_event err_event;
 370
 371         err_event.event = IB_EVENT_PORT_ERR;
 372         err_event.element.port_num = 1;
 373         err_event.device = &dev->ibdev;
 374         ib_dispatch_event(&err_event);
 375         return 0;
 376 }
 377
 378 static void ocrdma_shutdown(struct ocrdma_dev *dev)
 379 {
 380         ocrdma_dispatch_port_error(dev);
 381         ocrdma_remove(dev);
 382 }
 383
 384 /* event handling via NIC driver ensures that all the NIC specific
 385  * initialization done before RoCE driver notifies
 386  * event to stack.
 387  */
 388 static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
 389 {
 390         switch (event) {
 391         case BE_DEV_SHUTDOWN:
 392                 ocrdma_shutdown(dev);
 393                 break;
 394         default:
 395                 break;
 396         }
 397 }
 398
 399 void ocrdma_update_link_state(struct ocrdma_dev *dev, u8 lstate)
 400 {
 401         if (!(dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)) {
 402                 dev->flags |= OCRDMA_FLAGS_LINK_STATUS_INIT;
 403                 if (!lstate)
 404                         return;
 405         }
 406
 407         if (!lstate)
 408                 ocrdma_dispatch_port_error(dev);
 409         else
 410                 ocrdma_dispatch_port_active(dev);
 411 }
 412
 413 static struct ocrdma_driver ocrdma_drv = {
 414         .name                   = "ocrdma_driver",
 415         .add                    = ocrdma_add,
 416         .remove                 = ocrdma_remove,
 417         .state_change_handler   = ocrdma_event_handler,
 418         .be_abi_version         = OCRDMA_BE_ROCE_ABI_VERSION,
 419 };
 420
 421 static int __init ocrdma_init_module(void)
 422 {
 423         int status;
 424
 425         ocrdma_init_debugfs();
 426
 427         status = be_roce_register_driver(&ocrdma_drv);
 428         if (status)
 429                 goto err_be_reg;
 430
 431         return 0;
 432
 433 err_be_reg:
 434
 435         return status;
 436 }
 437
 438 static void __exit ocrdma_exit_module(void)
 439 {
 440         be_roce_unregister_driver(&ocrdma_drv);
 441         ocrdma_rem_debugfs();
 442 }
 443
 444 module_init(ocrdma_init_module);
 445 module_exit(ocrdma_exit_module);