drivers/infiniband/hw/hns/hns_roce_main.c

   1 /*
   2  * Copyright (c) 2016 Hisilicon Limited.
   3  * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33 #include <linux/acpi.h>
  34 #include <linux/of_platform.h>
  35 #include <linux/module.h>
  36 #include <rdma/ib_addr.h>
  37 #include <rdma/ib_smi.h>
  38 #include <rdma/ib_user_verbs.h>
  39 #include <rdma/ib_cache.h>
  40 #include "hns_roce_common.h"
  41 #include "hns_roce_device.h"
  42 #include <rdma/hns-abi.h>
  43 #include "hns_roce_hem.h"
  44
  45 /**
  46  * hns_get_gid_index - Get gid index.
  47  * @hr_dev: pointer to structure hns_roce_dev.
  48  * @port:  port, value range: 0 ~ MAX
  49  * @gid_index:  gid_index, value range: 0 ~ MAX
  50  * Description:
  51  *    N ports shared gids, allocation method as follow:
  52  *              GID[0][0], GID[1][0],.....GID[N - 1][0],
  53  *              GID[0][0], GID[1][0],.....GID[N - 1][0],
  54  *              And so on
  55  */
  56 int hns_get_gid_index(struct hns_roce_dev *hr_dev, u8 port, int gid_index)
  57 {
  58         return gid_index * hr_dev->caps.num_ports + port;
  59 }
  60
  61 static void hns_roce_set_mac(struct hns_roce_dev *hr_dev, u8 port, u8 *addr)
  62 {
  63         u8 phy_port;
  64         u32 i = 0;
  65
  66         if (!memcmp(hr_dev->dev_addr[port], addr, MAC_ADDR_OCTET_NUM))
  67                 return;
  68
  69         for (i = 0; i < MAC_ADDR_OCTET_NUM; i++)
  70                 hr_dev->dev_addr[port][i] = addr[i];
  71
  72         phy_port = hr_dev->iboe.phy_port[port];
  73         hr_dev->hw->set_mac(hr_dev, phy_port, addr);
  74 }
  75
  76 static int hns_roce_add_gid(struct ib_device *device, u8 port_num,
  77                             unsigned int index, const union ib_gid *gid,
  78                             const struct ib_gid_attr *attr, void **context)
  79 {
  80         struct hns_roce_dev *hr_dev = to_hr_dev(device);
  81         u8 port = port_num - 1;
  82         unsigned long flags;
  83
  84         if (port >= hr_dev->caps.num_ports)
  85                 return -EINVAL;
  86
  87         spin_lock_irqsave(&hr_dev->iboe.lock, flags);
  88
  89         hr_dev->hw->set_gid(hr_dev, port, index, (union ib_gid *)gid);
  90
  91         spin_unlock_irqrestore(&hr_dev->iboe.lock, flags);
  92
  93         return 0;
  94 }
  95
  96 static int hns_roce_del_gid(struct ib_device *device, u8 port_num,
  97                             unsigned int index, void **context)
  98 {
  99         struct hns_roce_dev *hr_dev = to_hr_dev(device);
 100         union ib_gid zgid = { {0} };
 101         u8 port = port_num - 1;
 102         unsigned long flags;
 103
 104         if (port >= hr_dev->caps.num_ports)
 105                 return -EINVAL;
 106
 107         spin_lock_irqsave(&hr_dev->iboe.lock, flags);
 108
 109         hr_dev->hw->set_gid(hr_dev, port, index, &zgid);
 110
 111         spin_unlock_irqrestore(&hr_dev->iboe.lock, flags);
 112
 113         return 0;
 114 }
 115
 116 static int handle_en_event(struct hns_roce_dev *hr_dev, u8 port,
 117                            unsigned long event)
 118 {
 119         struct device *dev = &hr_dev->pdev->dev;
 120         struct net_device *netdev;
 121
 122         netdev = hr_dev->iboe.netdevs[port];
 123         if (!netdev) {
 124                 dev_err(dev, "port(%d) can't find netdev\n", port);
 125                 return -ENODEV;
 126         }
 127
 128         spin_lock_bh(&hr_dev->iboe.lock);
 129
 130         switch (event) {
 131         case NETDEV_UP:
 132         case NETDEV_CHANGE:
 133         case NETDEV_REGISTER:
 134         case NETDEV_CHANGEADDR:
 135                 hns_roce_set_mac(hr_dev, port, netdev->dev_addr);
 136                 break;
 137         case NETDEV_DOWN:
 138                 /*
 139                  * In v1 engine, only support all ports closed together.
 140                  */
 141                 break;
 142         default:
 143                 dev_dbg(dev, "NETDEV event = 0x%x!\n", (u32)(event));
 144                 break;
 145         }
 146
 147         spin_unlock_bh(&hr_dev->iboe.lock);
 148         return 0;
 149 }
 150
 151 static int hns_roce_netdev_event(struct notifier_block *self,
 152                                  unsigned long event, void *ptr)
 153 {
 154         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
 155         struct hns_roce_ib_iboe *iboe = NULL;
 156         struct hns_roce_dev *hr_dev = NULL;
 157         u8 port = 0;
 158         int ret = 0;
 159
 160         hr_dev = container_of(self, struct hns_roce_dev, iboe.nb);
 161         iboe = &hr_dev->iboe;
 162
 163         for (port = 0; port < hr_dev->caps.num_ports; port++) {
 164                 if (dev == iboe->netdevs[port]) {
 165                         ret = handle_en_event(hr_dev, port, event);
 166                         if (ret)
 167                                 return NOTIFY_DONE;
 168                         break;
 169                 }
 170         }
 171
 172         return NOTIFY_DONE;
 173 }
 174
 175 static int hns_roce_setup_mtu_mac(struct hns_roce_dev *hr_dev)
 176 {
 177         u8 i;
 178
 179         for (i = 0; i < hr_dev->caps.num_ports; i++) {
 180                 hr_dev->hw->set_mtu(hr_dev, hr_dev->iboe.phy_port[i],
 181                                     hr_dev->caps.max_mtu);
 182                 hns_roce_set_mac(hr_dev, i, hr_dev->iboe.netdevs[i]->dev_addr);
 183         }
 184
 185         return 0;
 186 }
 187
 188 static int hns_roce_query_device(struct ib_device *ib_dev,
 189                                  struct ib_device_attr *props,
 190                                  struct ib_udata *uhw)
 191 {
 192         struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
 193
 194         memset(props, 0, sizeof(*props));
 195
 196         props->sys_image_guid = hr_dev->sys_image_guid;
 197         props->max_mr_size = (u64)(~(0ULL));
 198         props->page_size_cap = hr_dev->caps.page_size_cap;
 199         props->vendor_id = hr_dev->vendor_id;
 200         props->vendor_part_id = hr_dev->vendor_part_id;
 201         props->hw_ver = hr_dev->hw_rev;
 202         props->max_qp = hr_dev->caps.num_qps;
 203         props->max_qp_wr = hr_dev->caps.max_wqes;
 204         props->device_cap_flags = IB_DEVICE_PORT_ACTIVE_EVENT |
 205                                   IB_DEVICE_RC_RNR_NAK_GEN;
 206         props->max_sge = hr_dev->caps.max_sq_sg;
 207         props->max_sge_rd = 1;
 208         props->max_cq = hr_dev->caps.num_cqs;
 209         props->max_cqe = hr_dev->caps.max_cqes;
 210         props->max_mr = hr_dev->caps.num_mtpts;
 211         props->max_pd = hr_dev->caps.num_pds;
 212         props->max_qp_rd_atom = hr_dev->caps.max_qp_dest_rdma;
 213         props->max_qp_init_rd_atom = hr_dev->caps.max_qp_init_rdma;
 214         props->atomic_cap = IB_ATOMIC_NONE;
 215         props->max_pkeys = 1;
 216         props->local_ca_ack_delay = hr_dev->caps.local_ca_ack_delay;
 217
 218         return 0;
 219 }
 220
 221 static struct net_device *hns_roce_get_netdev(struct ib_device *ib_dev,
 222                                               u8 port_num)
 223 {
 224         struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
 225         struct net_device *ndev;
 226
 227         if (port_num < 1 || port_num > hr_dev->caps.num_ports)
 228                 return NULL;
 229
 230         rcu_read_lock();
 231
 232         ndev = hr_dev->iboe.netdevs[port_num - 1];
 233         if (ndev)
 234                 dev_hold(ndev);
 235
 236         rcu_read_unlock();
 237         return ndev;
 238 }
 239
 240 static int hns_roce_query_port(struct ib_device *ib_dev, u8 port_num,
 241                                struct ib_port_attr *props)
 242 {
 243         struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
 244         struct device *dev = &hr_dev->pdev->dev;
 245         struct net_device *net_dev;
 246         unsigned long flags;
 247         enum ib_mtu mtu;
 248         u8 port;
 249
 250         assert(port_num > 0);
 251         port = port_num - 1;
 252
 253         /* props being zeroed by the caller, avoid zeroing it here */
 254
 255         props->max_mtu = hr_dev->caps.max_mtu;
 256         props->gid_tbl_len = hr_dev->caps.gid_table_len[port];
 257         props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
 258                                 IB_PORT_VENDOR_CLASS_SUP |
 259                                 IB_PORT_BOOT_MGMT_SUP;
 260         props->max_msg_sz = HNS_ROCE_MAX_MSG_LEN;
 261         props->pkey_tbl_len = 1;
 262         props->active_width = IB_WIDTH_4X;
 263         props->active_speed = 1;
 264
 265         spin_lock_irqsave(&hr_dev->iboe.lock, flags);
 266
 267         net_dev = hr_dev->iboe.netdevs[port];
 268         if (!net_dev) {
 269                 spin_unlock_irqrestore(&hr_dev->iboe.lock, flags);
 270                 dev_err(dev, "find netdev %d failed!\r\n", port);
 271                 return -EINVAL;
 272         }
 273
 274         mtu = iboe_get_mtu(net_dev->mtu);
 275         props->active_mtu = mtu ? min(props->max_mtu, mtu) : IB_MTU_256;
 276         props->state = (netif_running(net_dev) && netif_carrier_ok(net_dev)) ?
 277                         IB_PORT_ACTIVE : IB_PORT_DOWN;
 278         props->phys_state = (props->state == IB_PORT_ACTIVE) ? 5 : 3;
 279
 280         spin_unlock_irqrestore(&hr_dev->iboe.lock, flags);
 281
 282         return 0;
 283 }
 284
 285 static enum rdma_link_layer hns_roce_get_link_layer(struct ib_device *device,
 286                                                     u8 port_num)
 287 {
 288         return IB_LINK_LAYER_ETHERNET;
 289 }
 290
 291 static int hns_roce_query_gid(struct ib_device *ib_dev, u8 port_num, int index,
 292                               union ib_gid *gid)
 293 {
 294         return 0;
 295 }
 296
 297 static int hns_roce_query_pkey(struct ib_device *ib_dev, u8 port, u16 index,
 298                                u16 *pkey)
 299 {
 300         *pkey = PKEY_ID;
 301
 302         return 0;
 303 }
 304
 305 static int hns_roce_modify_device(struct ib_device *ib_dev, int mask,
 306                                   struct ib_device_modify *props)
 307 {
 308         unsigned long flags;
 309
 310         if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
 311                 return -EOPNOTSUPP;
 312
 313         if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
 314                 spin_lock_irqsave(&to_hr_dev(ib_dev)->sm_lock, flags);
 315                 memcpy(ib_dev->node_desc, props->node_desc, NODE_DESC_SIZE);
 316                 spin_unlock_irqrestore(&to_hr_dev(ib_dev)->sm_lock, flags);
 317         }
 318
 319         return 0;
 320 }
 321
 322 static int hns_roce_modify_port(struct ib_device *ib_dev, u8 port_num, int mask,
 323                                 struct ib_port_modify *props)
 324 {
 325         return 0;
 326 }
 327
 328 static struct ib_ucontext *hns_roce_alloc_ucontext(struct ib_device *ib_dev,
 329                                                    struct ib_udata *udata)
 330 {
 331         int ret = 0;
 332         struct hns_roce_ucontext *context;
 333         struct hns_roce_ib_alloc_ucontext_resp resp;
 334         struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
 335
 336         resp.qp_tab_size = hr_dev->caps.num_qps;
 337
 338         context = kmalloc(sizeof(*context), GFP_KERNEL);
 339         if (!context)
 340                 return ERR_PTR(-ENOMEM);
 341
 342         ret = hns_roce_uar_alloc(hr_dev, &context->uar);
 343         if (ret)
 344                 goto error_fail_uar_alloc;
 345
 346         ret = ib_copy_to_udata(udata, &resp, sizeof(resp));
 347         if (ret)
 348                 goto error_fail_copy_to_udata;
 349
 350         return &context->ibucontext;
 351
 352 error_fail_copy_to_udata:
 353         hns_roce_uar_free(hr_dev, &context->uar);
 354
 355 error_fail_uar_alloc:
 356         kfree(context);
 357
 358         return ERR_PTR(ret);
 359 }
 360
 361 static int hns_roce_dealloc_ucontext(struct ib_ucontext *ibcontext)
 362 {
 363         struct hns_roce_ucontext *context = to_hr_ucontext(ibcontext);
 364
 365         hns_roce_uar_free(to_hr_dev(ibcontext->device), &context->uar);
 366         kfree(context);
 367
 368         return 0;
 369 }
 370
 371 static int hns_roce_mmap(struct ib_ucontext *context,
 372                          struct vm_area_struct *vma)
 373 {
 374         struct hns_roce_dev *hr_dev = to_hr_dev(context->device);
 375
 376         if (((vma->vm_end - vma->vm_start) % PAGE_SIZE) != 0)
 377                 return -EINVAL;
 378
 379         if (vma->vm_pgoff == 0) {
 380                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 381                 if (io_remap_pfn_range(vma, vma->vm_start,
 382                                        to_hr_ucontext(context)->uar.pfn,
 383                                        PAGE_SIZE, vma->vm_page_prot))
 384                         return -EAGAIN;
 385         } else if (vma->vm_pgoff == 1 && hr_dev->hw_rev == HNS_ROCE_HW_VER1) {
 386                 /* vm_pgoff: 1 -- TPTR */
 387                 if (io_remap_pfn_range(vma, vma->vm_start,
 388                                        hr_dev->tptr_dma_addr >> PAGE_SHIFT,
 389                                        hr_dev->tptr_size,
 390                                        vma->vm_page_prot))
 391                         return -EAGAIN;
 392         } else
 393                 return -EINVAL;
 394
 395         return 0;
 396 }
 397
 398 static int hns_roce_port_immutable(struct ib_device *ib_dev, u8 port_num,
 399                                    struct ib_port_immutable *immutable)
 400 {
 401         struct ib_port_attr attr;
 402         int ret;
 403
 404         immutable->core_cap_flags = RDMA_CORE_PORT_IBA_ROCE;
 405
 406         ret = ib_query_port(ib_dev, port_num, &attr);
 407         if (ret)
 408                 return ret;
 409
 410         immutable->pkey_tbl_len = attr.pkey_tbl_len;
 411         immutable->gid_tbl_len = attr.gid_tbl_len;
 412
 413         immutable->max_mad_size = IB_MGMT_MAD_SIZE;
 414
 415         return 0;
 416 }
 417
 418 static void hns_roce_unregister_device(struct hns_roce_dev *hr_dev)
 419 {
 420         struct hns_roce_ib_iboe *iboe = &hr_dev->iboe;
 421
 422         unregister_inetaddr_notifier(&iboe->nb_inet);
 423         unregister_netdevice_notifier(&iboe->nb);
 424         ib_unregister_device(&hr_dev->ib_dev);
 425 }
 426
 427 static int hns_roce_register_device(struct hns_roce_dev *hr_dev)
 428 {
 429         int ret;
 430         struct hns_roce_ib_iboe *iboe = NULL;
 431         struct ib_device *ib_dev = NULL;
 432         struct device *dev = &hr_dev->pdev->dev;
 433
 434         iboe = &hr_dev->iboe;
 435         spin_lock_init(&iboe->lock);
 436
 437         ib_dev = &hr_dev->ib_dev;
 438         strlcpy(ib_dev->name, "hns_%d", IB_DEVICE_NAME_MAX);
 439
 440         ib_dev->owner                   = THIS_MODULE;
 441         ib_dev->node_type               = RDMA_NODE_IB_CA;
 442         ib_dev->dev.parent              = dev;
 443
 444         ib_dev->phys_port_cnt           = hr_dev->caps.num_ports;
 445         ib_dev->local_dma_lkey          = hr_dev->caps.reserved_lkey;
 446         ib_dev->num_comp_vectors        = hr_dev->caps.num_comp_vectors;
 447         ib_dev->uverbs_abi_ver          = 1;
 448         ib_dev->uverbs_cmd_mask         =
 449                 (1ULL << IB_USER_VERBS_CMD_GET_CONTEXT) |
 450                 (1ULL << IB_USER_VERBS_CMD_QUERY_DEVICE) |
 451                 (1ULL << IB_USER_VERBS_CMD_QUERY_PORT) |
 452                 (1ULL << IB_USER_VERBS_CMD_ALLOC_PD) |
 453                 (1ULL << IB_USER_VERBS_CMD_DEALLOC_PD) |
 454                 (1ULL << IB_USER_VERBS_CMD_REG_MR) |
 455                 (1ULL << IB_USER_VERBS_CMD_DEREG_MR) |
 456                 (1ULL << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 457                 (1ULL << IB_USER_VERBS_CMD_CREATE_CQ) |
 458                 (1ULL << IB_USER_VERBS_CMD_DESTROY_CQ) |
 459                 (1ULL << IB_USER_VERBS_CMD_CREATE_QP) |
 460                 (1ULL << IB_USER_VERBS_CMD_MODIFY_QP) |
 461                 (1ULL << IB_USER_VERBS_CMD_QUERY_QP) |
 462                 (1ULL << IB_USER_VERBS_CMD_DESTROY_QP);
 463
 464         /* HCA||device||port */
 465         ib_dev->modify_device           = hns_roce_modify_device;
 466         ib_dev->query_device            = hns_roce_query_device;
 467         ib_dev->query_port              = hns_roce_query_port;
 468         ib_dev->modify_port             = hns_roce_modify_port;
 469         ib_dev->get_link_layer          = hns_roce_get_link_layer;
 470         ib_dev->get_netdev              = hns_roce_get_netdev;
 471         ib_dev->query_gid               = hns_roce_query_gid;
 472         ib_dev->add_gid                 = hns_roce_add_gid;
 473         ib_dev->del_gid                 = hns_roce_del_gid;
 474         ib_dev->query_pkey              = hns_roce_query_pkey;
 475         ib_dev->alloc_ucontext          = hns_roce_alloc_ucontext;
 476         ib_dev->dealloc_ucontext        = hns_roce_dealloc_ucontext;
 477         ib_dev->mmap                    = hns_roce_mmap;
 478
 479         /* PD */
 480         ib_dev->alloc_pd                = hns_roce_alloc_pd;
 481         ib_dev->dealloc_pd              = hns_roce_dealloc_pd;
 482
 483         /* AH */
 484         ib_dev->create_ah               = hns_roce_create_ah;
 485         ib_dev->query_ah                = hns_roce_query_ah;
 486         ib_dev->destroy_ah              = hns_roce_destroy_ah;
 487
 488         /* QP */
 489         ib_dev->create_qp               = hns_roce_create_qp;
 490         ib_dev->modify_qp               = hns_roce_modify_qp;
 491         ib_dev->query_qp                = hr_dev->hw->query_qp;
 492         ib_dev->destroy_qp              = hr_dev->hw->destroy_qp;
 493         ib_dev->post_send               = hr_dev->hw->post_send;
 494         ib_dev->post_recv               = hr_dev->hw->post_recv;
 495
 496         /* CQ */
 497         ib_dev->create_cq               = hns_roce_ib_create_cq;
 498         ib_dev->destroy_cq              = hns_roce_ib_destroy_cq;
 499         ib_dev->req_notify_cq           = hr_dev->hw->req_notify_cq;
 500         ib_dev->poll_cq                 = hr_dev->hw->poll_cq;
 501
 502         /* MR */
 503         ib_dev->get_dma_mr              = hns_roce_get_dma_mr;
 504         ib_dev->reg_user_mr             = hns_roce_reg_user_mr;
 505         ib_dev->dereg_mr                = hns_roce_dereg_mr;
 506
 507         /* OTHERS */
 508         ib_dev->get_port_immutable      = hns_roce_port_immutable;
 509
 510         ret = ib_register_device(ib_dev, NULL);
 511         if (ret) {
 512                 dev_err(dev, "ib_register_device failed!\n");
 513                 return ret;
 514         }
 515
 516         ret = hns_roce_setup_mtu_mac(hr_dev);
 517         if (ret) {
 518                 dev_err(dev, "setup_mtu_mac failed!\n");
 519                 goto error_failed_setup_mtu_mac;
 520         }
 521
 522         iboe->nb.notifier_call = hns_roce_netdev_event;
 523         ret = register_netdevice_notifier(&iboe->nb);
 524         if (ret) {
 525                 dev_err(dev, "register_netdevice_notifier failed!\n");
 526                 goto error_failed_setup_mtu_mac;
 527         }
 528
 529         return 0;
 530
 531 error_failed_setup_mtu_mac:
 532         ib_unregister_device(ib_dev);
 533
 534         return ret;
 535 }
 536
 537 static const struct of_device_id hns_roce_of_match[] = {
 538         { .compatible = "hisilicon,hns-roce-v1", .data = &hns_roce_hw_v1, },
 539         {},
 540 };
 541 MODULE_DEVICE_TABLE(of, hns_roce_of_match);
 542
 543 static const struct acpi_device_id hns_roce_acpi_match[] = {
 544         { "HISI00D1", (kernel_ulong_t)&hns_roce_hw_v1 },
 545         {},
 546 };
 547 MODULE_DEVICE_TABLE(acpi, hns_roce_acpi_match);
 548
 549 static int hns_roce_node_match(struct device *dev, void *fwnode)
 550 {
 551         return dev->fwnode == fwnode;
 552 }
 553
 554 static struct
 555 platform_device *hns_roce_find_pdev(struct fwnode_handle *fwnode)
 556 {
 557         struct device *dev;
 558
 559         /* get the 'device'corresponding to matching 'fwnode' */
 560         dev = bus_find_device(&platform_bus_type, NULL,
 561                               fwnode, hns_roce_node_match);
 562         /* get the platform device */
 563         return dev ? to_platform_device(dev) : NULL;
 564 }
 565
 566 static int hns_roce_get_cfg(struct hns_roce_dev *hr_dev)
 567 {
 568         int i;
 569         int ret;
 570         u8 phy_port;
 571         int port_cnt = 0;
 572         struct device *dev = &hr_dev->pdev->dev;
 573         struct device_node *net_node;
 574         struct net_device *netdev = NULL;
 575         struct platform_device *pdev = NULL;
 576         struct resource *res;
 577
 578         /* check if we are compatible with the underlying SoC */
 579         if (dev_of_node(dev)) {
 580                 const struct of_device_id *of_id;
 581
 582                 of_id = of_match_node(hns_roce_of_match, dev->of_node);
 583                 if (!of_id) {
 584                         dev_err(dev, "device is not compatible!\n");
 585                         return -ENXIO;
 586                 }
 587                 hr_dev->hw = (struct hns_roce_hw *)of_id->data;
 588                 if (!hr_dev->hw) {
 589                         dev_err(dev, "couldn't get H/W specific DT data!\n");
 590                         return -ENXIO;
 591                 }
 592         } else if (is_acpi_device_node(dev->fwnode)) {
 593                 const struct acpi_device_id *acpi_id;
 594
 595                 acpi_id = acpi_match_device(hns_roce_acpi_match, dev);
 596                 if (!acpi_id) {
 597                         dev_err(dev, "device is not compatible!\n");
 598                         return -ENXIO;
 599                 }
 600                 hr_dev->hw = (struct hns_roce_hw *) acpi_id->driver_data;
 601                 if (!hr_dev->hw) {
 602                         dev_err(dev, "couldn't get H/W specific ACPI data!\n");
 603                         return -ENXIO;
 604                 }
 605         } else {
 606                 dev_err(dev, "can't read compatibility data from DT or ACPI\n");
 607                 return -ENXIO;
 608         }
 609
 610         /* get the mapped register base address */
 611         res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0);
 612         if (!res) {
 613                 dev_err(dev, "memory resource not found!\n");
 614                 return -EINVAL;
 615         }
 616         hr_dev->reg_base = devm_ioremap_resource(dev, res);
 617         if (IS_ERR(hr_dev->reg_base))
 618                 return PTR_ERR(hr_dev->reg_base);
 619
 620         /* read the node_guid of IB device from the DT or ACPI */
 621         ret = device_property_read_u8_array(dev, "node-guid",
 622                                             (u8 *)&hr_dev->ib_dev.node_guid,
 623                                             GUID_LEN);
 624         if (ret) {
 625                 dev_err(dev, "couldn't get node_guid from DT or ACPI!\n");
 626                 return ret;
 627         }
 628
 629         /* get the RoCE associated ethernet ports or netdevices */
 630         for (i = 0; i < HNS_ROCE_MAX_PORTS; i++) {
 631                 if (dev_of_node(dev)) {
 632                         net_node = of_parse_phandle(dev->of_node, "eth-handle",
 633                                                     i);
 634                         if (!net_node)
 635                                 continue;
 636                         pdev = of_find_device_by_node(net_node);
 637                 } else if (is_acpi_device_node(dev->fwnode)) {
 638                         struct acpi_reference_args args;
 639                         struct fwnode_handle *fwnode;
 640
 641                         ret = acpi_node_get_property_reference(dev->fwnode,
 642                                                                "eth-handle",
 643                                                                i, &args);
 644                         if (ret)
 645                                 continue;
 646                         fwnode = acpi_fwnode_handle(args.adev);
 647                         pdev = hns_roce_find_pdev(fwnode);
 648                 } else {
 649                         dev_err(dev, "cannot read data from DT or ACPI\n");
 650                         return -ENXIO;
 651                 }
 652
 653                 if (pdev) {
 654                         netdev = platform_get_drvdata(pdev);
 655                         phy_port = (u8)i;
 656                         if (netdev) {
 657                                 hr_dev->iboe.netdevs[port_cnt] = netdev;
 658                                 hr_dev->iboe.phy_port[port_cnt] = phy_port;
 659                         } else {
 660                                 dev_err(dev, "no netdev found with pdev %s\n",
 661                                         pdev->name);
 662                                 return -ENODEV;
 663                         }
 664                         port_cnt++;
 665                 }
 666         }
 667
 668         if (port_cnt == 0) {
 669                 dev_err(dev, "unable to get eth-handle for available ports!\n");
 670                 return -EINVAL;
 671         }
 672
 673         hr_dev->caps.num_ports = port_cnt;
 674
 675         /* cmd issue mode: 0 is poll, 1 is event */
 676         hr_dev->cmd_mod = 1;
 677         hr_dev->loop_idc = 0;
 678
 679         /* read the interrupt names from the DT or ACPI */
 680         ret = device_property_read_string_array(dev, "interrupt-names",
 681                                                 hr_dev->irq_names,
 682                                                 HNS_ROCE_MAX_IRQ_NUM);
 683         if (ret < 0) {
 684                 dev_err(dev, "couldn't get interrupt names from DT or ACPI!\n");
 685                 return ret;
 686         }
 687
 688         /* fetch the interrupt numbers */
 689         for (i = 0; i < HNS_ROCE_MAX_IRQ_NUM; i++) {
 690                 hr_dev->irq[i] = platform_get_irq(hr_dev->pdev, i);
 691                 if (hr_dev->irq[i] <= 0) {
 692                         dev_err(dev, "platform get of irq[=%d] failed!\n", i);
 693                         return -EINVAL;
 694                 }
 695         }
 696
 697         return 0;
 698 }
 699
 700 static int hns_roce_init_hem(struct hns_roce_dev *hr_dev)
 701 {
 702         int ret;
 703         struct device *dev = &hr_dev->pdev->dev;
 704
 705         ret = hns_roce_init_hem_table(hr_dev, &hr_dev->mr_table.mtt_table,
 706                                       HEM_TYPE_MTT, hr_dev->caps.mtt_entry_sz,
 707                                       hr_dev->caps.num_mtt_segs, 1);
 708         if (ret) {
 709                 dev_err(dev, "Failed to init MTT context memory, aborting.\n");
 710                 return ret;
 711         }
 712
 713         ret = hns_roce_init_hem_table(hr_dev, &hr_dev->mr_table.mtpt_table,
 714                                       HEM_TYPE_MTPT, hr_dev->caps.mtpt_entry_sz,
 715                                       hr_dev->caps.num_mtpts, 1);
 716         if (ret) {
 717                 dev_err(dev, "Failed to init MTPT context memory, aborting.\n");
 718                 goto err_unmap_mtt;
 719         }
 720
 721         ret = hns_roce_init_hem_table(hr_dev, &hr_dev->qp_table.qp_table,
 722                                       HEM_TYPE_QPC, hr_dev->caps.qpc_entry_sz,
 723                                       hr_dev->caps.num_qps, 1);
 724         if (ret) {
 725                 dev_err(dev, "Failed to init QP context memory, aborting.\n");
 726                 goto err_unmap_dmpt;
 727         }
 728
 729         ret = hns_roce_init_hem_table(hr_dev, &hr_dev->qp_table.irrl_table,
 730                                       HEM_TYPE_IRRL,
 731                                       hr_dev->caps.irrl_entry_sz *
 732                                       hr_dev->caps.max_qp_init_rdma,
 733                                       hr_dev->caps.num_qps, 1);
 734         if (ret) {
 735                 dev_err(dev, "Failed to init irrl_table memory, aborting.\n");
 736                 goto err_unmap_qp;
 737         }
 738
 739         ret = hns_roce_init_hem_table(hr_dev, &hr_dev->cq_table.table,
 740                                       HEM_TYPE_CQC, hr_dev->caps.cqc_entry_sz,
 741                                       hr_dev->caps.num_cqs, 1);
 742         if (ret) {
 743                 dev_err(dev, "Failed to init CQ context memory, aborting.\n");
 744                 goto err_unmap_irrl;
 745         }
 746
 747         return 0;
 748
 749 err_unmap_irrl:
 750         hns_roce_cleanup_hem_table(hr_dev, &hr_dev->qp_table.irrl_table);
 751
 752 err_unmap_qp:
 753         hns_roce_cleanup_hem_table(hr_dev, &hr_dev->qp_table.qp_table);
 754
 755 err_unmap_dmpt:
 756         hns_roce_cleanup_hem_table(hr_dev, &hr_dev->mr_table.mtpt_table);
 757
 758 err_unmap_mtt:
 759         hns_roce_cleanup_hem_table(hr_dev, &hr_dev->mr_table.mtt_table);
 760
 761         return ret;
 762 }
 763
 764 /**
 765  * hns_roce_setup_hca - setup host channel adapter
 766  * @hr_dev: pointer to hns roce device
 767  * Return : int
 768  */
 769 static int hns_roce_setup_hca(struct hns_roce_dev *hr_dev)
 770 {
 771         int ret;
 772         struct device *dev = &hr_dev->pdev->dev;
 773
 774         spin_lock_init(&hr_dev->sm_lock);
 775         spin_lock_init(&hr_dev->bt_cmd_lock);
 776
 777         ret = hns_roce_init_uar_table(hr_dev);
 778         if (ret) {
 779                 dev_err(dev, "Failed to initialize uar table. aborting\n");
 780                 return ret;
 781         }
 782
 783         ret = hns_roce_uar_alloc(hr_dev, &hr_dev->priv_uar);
 784         if (ret) {
 785                 dev_err(dev, "Failed to allocate priv_uar.\n");
 786                 goto err_uar_table_free;
 787         }
 788
 789         ret = hns_roce_init_pd_table(hr_dev);
 790         if (ret) {
 791                 dev_err(dev, "Failed to init protected domain table.\n");
 792                 goto err_uar_alloc_free;
 793         }
 794
 795         ret = hns_roce_init_mr_table(hr_dev);
 796         if (ret) {
 797                 dev_err(dev, "Failed to init memory region table.\n");
 798                 goto err_pd_table_free;
 799         }
 800
 801         ret = hns_roce_init_cq_table(hr_dev);
 802         if (ret) {
 803                 dev_err(dev, "Failed to init completion queue table.\n");
 804                 goto err_mr_table_free;
 805         }
 806
 807         ret = hns_roce_init_qp_table(hr_dev);
 808         if (ret) {
 809                 dev_err(dev, "Failed to init queue pair table.\n");
 810                 goto err_cq_table_free;
 811         }
 812
 813         return 0;
 814
 815 err_cq_table_free:
 816         hns_roce_cleanup_cq_table(hr_dev);
 817
 818 err_mr_table_free:
 819         hns_roce_cleanup_mr_table(hr_dev);
 820
 821 err_pd_table_free:
 822         hns_roce_cleanup_pd_table(hr_dev);
 823
 824 err_uar_alloc_free:
 825         hns_roce_uar_free(hr_dev, &hr_dev->priv_uar);
 826
 827 err_uar_table_free:
 828         hns_roce_cleanup_uar_table(hr_dev);
 829         return ret;
 830 }
 831
 832 /**
 833  * hns_roce_probe - RoCE driver entrance
 834  * @pdev: pointer to platform device
 835  * Return : int
 836  *
 837  */
 838 static int hns_roce_probe(struct platform_device *pdev)
 839 {
 840         int ret;
 841         struct hns_roce_dev *hr_dev;
 842         struct device *dev = &pdev->dev;
 843
 844         hr_dev = (struct hns_roce_dev *)ib_alloc_device(sizeof(*hr_dev));
 845         if (!hr_dev)
 846                 return -ENOMEM;
 847
 848         hr_dev->pdev = pdev;
 849         platform_set_drvdata(pdev, hr_dev);
 850
 851         if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64ULL)) &&
 852             dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32ULL))) {
 853                 dev_err(dev, "Not usable DMA addressing mode\n");
 854                 ret = -EIO;
 855                 goto error_failed_get_cfg;
 856         }
 857
 858         ret = hns_roce_get_cfg(hr_dev);
 859         if (ret) {
 860                 dev_err(dev, "Get Configuration failed!\n");
 861                 goto error_failed_get_cfg;
 862         }
 863
 864         ret = hr_dev->hw->reset(hr_dev, true);
 865         if (ret) {
 866                 dev_err(dev, "Reset RoCE engine failed!\n");
 867                 goto error_failed_get_cfg;
 868         }
 869
 870         hr_dev->hw->hw_profile(hr_dev);
 871
 872         ret = hns_roce_cmd_init(hr_dev);
 873         if (ret) {
 874                 dev_err(dev, "cmd init failed!\n");
 875                 goto error_failed_cmd_init;
 876         }
 877
 878         ret = hns_roce_init_eq_table(hr_dev);
 879         if (ret) {
 880                 dev_err(dev, "eq init failed!\n");
 881                 goto error_failed_eq_table;
 882         }
 883
 884         if (hr_dev->cmd_mod) {
 885                 ret = hns_roce_cmd_use_events(hr_dev);
 886                 if (ret) {
 887                         dev_err(dev, "Switch to event-driven cmd failed!\n");
 888                         goto error_failed_use_event;
 889                 }
 890         }
 891
 892         ret = hns_roce_init_hem(hr_dev);
 893         if (ret) {
 894                 dev_err(dev, "init HEM(Hardware Entry Memory) failed!\n");
 895                 goto error_failed_init_hem;
 896         }
 897
 898         ret = hns_roce_setup_hca(hr_dev);
 899         if (ret) {
 900                 dev_err(dev, "setup hca failed!\n");
 901                 goto error_failed_setup_hca;
 902         }
 903
 904         ret = hr_dev->hw->hw_init(hr_dev);
 905         if (ret) {
 906                 dev_err(dev, "hw_init failed!\n");
 907                 goto error_failed_engine_init;
 908         }
 909
 910         ret = hns_roce_register_device(hr_dev);
 911         if (ret)
 912                 goto error_failed_register_device;
 913
 914         return 0;
 915
 916 error_failed_register_device:
 917         hr_dev->hw->hw_exit(hr_dev);
 918
 919 error_failed_engine_init:
 920         hns_roce_cleanup_bitmap(hr_dev);
 921
 922 error_failed_setup_hca:
 923         hns_roce_cleanup_hem(hr_dev);
 924
 925 error_failed_init_hem:
 926         if (hr_dev->cmd_mod)
 927                 hns_roce_cmd_use_polling(hr_dev);
 928
 929 error_failed_use_event:
 930         hns_roce_cleanup_eq_table(hr_dev);
 931
 932 error_failed_eq_table:
 933         hns_roce_cmd_cleanup(hr_dev);
 934
 935 error_failed_cmd_init:
 936         ret = hr_dev->hw->reset(hr_dev, false);
 937         if (ret)
 938                 dev_err(&hr_dev->pdev->dev, "roce_engine reset fail\n");
 939
 940 error_failed_get_cfg:
 941         ib_dealloc_device(&hr_dev->ib_dev);
 942
 943         return ret;
 944 }
 945
 946 /**
 947  * hns_roce_remove - remove RoCE device
 948  * @pdev: pointer to platform device
 949  */
 950 static int hns_roce_remove(struct platform_device *pdev)
 951 {
 952         struct hns_roce_dev *hr_dev = platform_get_drvdata(pdev);
 953
 954         hns_roce_unregister_device(hr_dev);
 955         hr_dev->hw->hw_exit(hr_dev);
 956         hns_roce_cleanup_bitmap(hr_dev);
 957         hns_roce_cleanup_hem(hr_dev);
 958
 959         if (hr_dev->cmd_mod)
 960                 hns_roce_cmd_use_polling(hr_dev);
 961
 962         hns_roce_cleanup_eq_table(hr_dev);
 963         hns_roce_cmd_cleanup(hr_dev);
 964         hr_dev->hw->reset(hr_dev, false);
 965
 966         ib_dealloc_device(&hr_dev->ib_dev);
 967
 968         return 0;
 969 }
 970
 971 static struct platform_driver hns_roce_driver = {
 972         .probe = hns_roce_probe,
 973         .remove = hns_roce_remove,
 974         .driver = {
 975                 .name = DRV_NAME,
 976                 .of_match_table = hns_roce_of_match,
 977                 .acpi_match_table = ACPI_PTR(hns_roce_acpi_match),
 978         },
 979 };
 980
 981 module_platform_driver(hns_roce_driver);
 982
 983 MODULE_LICENSE("Dual BSD/GPL");
 984 MODULE_AUTHOR("Wei Hu <xavier.huwei@huawei.com>");
 985 MODULE_AUTHOR("Nenglong Zhao <zhaonenglong@hisilicon.com>");
 986 MODULE_AUTHOR("Lijun Ou <oulijun@huawei.com>");
 987 MODULE_DESCRIPTION("HNS RoCE Driver");