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