drivers/vdpa/ifcvf/ifcvf_main.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Intel IFC VF NIC driver for virtio dataplane offloading
   4  *
   5  * Copyright (C) 2020 Intel Corporation.
   6  *
   7  * Author: Zhu Lingshan <lingshan.zhu@intel.com>
   8  *
   9  */
  10
  11 #include <linux/interrupt.h>
  12 #include <linux/module.h>
  13 #include <linux/pci.h>
  14 #include <linux/sysfs.h>
  15 #include "ifcvf_base.h"
  16
  17 #define DRIVER_AUTHOR   "Intel Corporation"
  18 #define IFCVF_DRIVER_NAME       "ifcvf"
  19
  20 static irqreturn_t ifcvf_config_changed(int irq, void *arg)
  21 {
  22         struct ifcvf_hw *vf = arg;
  23
  24         if (vf->config_cb.callback)
  25                 return vf->config_cb.callback(vf->config_cb.private);
  26
  27         return IRQ_HANDLED;
  28 }
  29
  30 static irqreturn_t ifcvf_intr_handler(int irq, void *arg)
  31 {
  32         struct vring_info *vring = arg;
  33
  34         if (vring->cb.callback)
  35                 return vring->cb.callback(vring->cb.private);
  36
  37         return IRQ_HANDLED;
  38 }
  39
  40 static void ifcvf_free_irq_vectors(void *data)
  41 {
  42         pci_free_irq_vectors(data);
  43 }
  44
  45 static void ifcvf_free_irq(struct ifcvf_adapter *adapter, int queues)
  46 {
  47         struct pci_dev *pdev = adapter->pdev;
  48         struct ifcvf_hw *vf = &adapter->vf;
  49         int i;
  50
  51
  52         for (i = 0; i < queues; i++) {
  53                 devm_free_irq(&pdev->dev, vf->vring[i].irq, &vf->vring[i]);
  54                 vf->vring[i].irq = -EINVAL;
  55         }
  56
  57         devm_free_irq(&pdev->dev, vf->config_irq, vf);
  58         ifcvf_free_irq_vectors(pdev);
  59 }
  60
  61 static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
  62 {
  63         struct pci_dev *pdev = adapter->pdev;
  64         struct ifcvf_hw *vf = &adapter->vf;
  65         int vector, i, ret, irq;
  66         u16 max_intr;
  67
  68         /* all queues and config interrupt  */
  69         max_intr = vf->nr_vring + 1;
  70
  71         ret = pci_alloc_irq_vectors(pdev, max_intr,
  72                                     max_intr, PCI_IRQ_MSIX);
  73         if (ret < 0) {
  74                 IFCVF_ERR(pdev, "Failed to alloc IRQ vectors\n");
  75                 return ret;
  76         }
  77
  78         snprintf(vf->config_msix_name, 256, "ifcvf[%s]-config\n",
  79                  pci_name(pdev));
  80         vector = 0;
  81         vf->config_irq = pci_irq_vector(pdev, vector);
  82         ret = devm_request_irq(&pdev->dev, vf->config_irq,
  83                                ifcvf_config_changed, 0,
  84                                vf->config_msix_name, vf);
  85         if (ret) {
  86                 IFCVF_ERR(pdev, "Failed to request config irq\n");
  87                 return ret;
  88         }
  89
  90         for (i = 0; i < vf->nr_vring; i++) {
  91                 snprintf(vf->vring[i].msix_name, 256, "ifcvf[%s]-%d\n",
  92                          pci_name(pdev), i);
  93                 vector = i + IFCVF_MSI_QUEUE_OFF;
  94                 irq = pci_irq_vector(pdev, vector);
  95                 ret = devm_request_irq(&pdev->dev, irq,
  96                                        ifcvf_intr_handler, 0,
  97                                        vf->vring[i].msix_name,
  98                                        &vf->vring[i]);
  99                 if (ret) {
 100                         IFCVF_ERR(pdev,
 101                                   "Failed to request irq for vq %d\n", i);
 102                         ifcvf_free_irq(adapter, i);
 103
 104                         return ret;
 105                 }
 106
 107                 vf->vring[i].irq = irq;
 108         }
 109
 110         return 0;
 111 }
 112
 113 static int ifcvf_start_datapath(void *private)
 114 {
 115         struct ifcvf_hw *vf = ifcvf_private_to_vf(private);
 116         u8 status;
 117         int ret;
 118
 119         ret = ifcvf_start_hw(vf);
 120         if (ret < 0) {
 121                 status = ifcvf_get_status(vf);
 122                 status |= VIRTIO_CONFIG_S_FAILED;
 123                 ifcvf_set_status(vf, status);
 124         }
 125
 126         return ret;
 127 }
 128
 129 static int ifcvf_stop_datapath(void *private)
 130 {
 131         struct ifcvf_hw *vf = ifcvf_private_to_vf(private);
 132         int i;
 133
 134         for (i = 0; i < vf->nr_vring; i++)
 135                 vf->vring[i].cb.callback = NULL;
 136
 137         ifcvf_stop_hw(vf);
 138
 139         return 0;
 140 }
 141
 142 static void ifcvf_reset_vring(struct ifcvf_adapter *adapter)
 143 {
 144         struct ifcvf_hw *vf = ifcvf_private_to_vf(adapter);
 145         int i;
 146
 147         for (i = 0; i < vf->nr_vring; i++) {
 148                 vf->vring[i].last_avail_idx = 0;
 149                 vf->vring[i].desc = 0;
 150                 vf->vring[i].avail = 0;
 151                 vf->vring[i].used = 0;
 152                 vf->vring[i].ready = 0;
 153                 vf->vring[i].cb.callback = NULL;
 154                 vf->vring[i].cb.private = NULL;
 155         }
 156
 157         ifcvf_reset(vf);
 158 }
 159
 160 static struct ifcvf_adapter *vdpa_to_adapter(struct vdpa_device *vdpa_dev)
 161 {
 162         return container_of(vdpa_dev, struct ifcvf_adapter, vdpa);
 163 }
 164
 165 static struct ifcvf_hw *vdpa_to_vf(struct vdpa_device *vdpa_dev)
 166 {
 167         struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
 168
 169         return &adapter->vf;
 170 }
 171
 172 static u64 ifcvf_vdpa_get_features(struct vdpa_device *vdpa_dev)
 173 {
 174         struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
 175         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 176         struct pci_dev *pdev = adapter->pdev;
 177         u32 type = vf->dev_type;
 178         u64 features;
 179
 180         if (type == VIRTIO_ID_NET || type == VIRTIO_ID_BLOCK)
 181                 features = ifcvf_get_features(vf);
 182         else {
 183                 features = 0;
 184                 IFCVF_ERR(pdev, "VIRTIO ID %u not supported\n", vf->dev_type);
 185         }
 186
 187         return features;
 188 }
 189
 190 static int ifcvf_vdpa_set_features(struct vdpa_device *vdpa_dev, u64 features)
 191 {
 192         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 193         int ret;
 194
 195         ret = ifcvf_verify_min_features(vf, features);
 196         if (ret)
 197                 return ret;
 198
 199         vf->req_features = features;
 200
 201         return 0;
 202 }
 203
 204 static u8 ifcvf_vdpa_get_status(struct vdpa_device *vdpa_dev)
 205 {
 206         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 207
 208         return ifcvf_get_status(vf);
 209 }
 210
 211 static void ifcvf_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 status)
 212 {
 213         struct ifcvf_adapter *adapter;
 214         struct ifcvf_hw *vf;
 215         u8 status_old;
 216         int ret;
 217
 218         vf  = vdpa_to_vf(vdpa_dev);
 219         adapter = vdpa_to_adapter(vdpa_dev);
 220         status_old = ifcvf_get_status(vf);
 221
 222         if (status_old == status)
 223                 return;
 224
 225         if ((status & VIRTIO_CONFIG_S_DRIVER_OK) &&
 226             !(status_old & VIRTIO_CONFIG_S_DRIVER_OK)) {
 227                 ret = ifcvf_request_irq(adapter);
 228                 if (ret) {
 229                         status = ifcvf_get_status(vf);
 230                         status |= VIRTIO_CONFIG_S_FAILED;
 231                         ifcvf_set_status(vf, status);
 232                         return;
 233                 }
 234
 235                 if (ifcvf_start_datapath(adapter) < 0)
 236                         IFCVF_ERR(adapter->pdev,
 237                                   "Failed to set ifcvf vdpa  status %u\n",
 238                                   status);
 239         }
 240
 241         ifcvf_set_status(vf, status);
 242 }
 243
 244 static int ifcvf_vdpa_reset(struct vdpa_device *vdpa_dev)
 245 {
 246         struct ifcvf_adapter *adapter;
 247         struct ifcvf_hw *vf;
 248         u8 status_old;
 249
 250         vf  = vdpa_to_vf(vdpa_dev);
 251         adapter = vdpa_to_adapter(vdpa_dev);
 252         status_old = ifcvf_get_status(vf);
 253
 254         if (status_old == 0)
 255                 return 0;
 256
 257         if (status_old & VIRTIO_CONFIG_S_DRIVER_OK) {
 258                 ifcvf_stop_datapath(adapter);
 259                 ifcvf_free_irq(adapter, vf->nr_vring);
 260         }
 261
 262         ifcvf_reset_vring(adapter);
 263
 264         return 0;
 265 }
 266
 267 static u16 ifcvf_vdpa_get_vq_num_max(struct vdpa_device *vdpa_dev)
 268 {
 269         return IFCVF_QUEUE_MAX;
 270 }
 271
 272 static int ifcvf_vdpa_get_vq_state(struct vdpa_device *vdpa_dev, u16 qid,
 273                                    struct vdpa_vq_state *state)
 274 {
 275         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 276
 277         state->split.avail_index = ifcvf_get_vq_state(vf, qid);
 278         return 0;
 279 }
 280
 281 static int ifcvf_vdpa_set_vq_state(struct vdpa_device *vdpa_dev, u16 qid,
 282                                    const struct vdpa_vq_state *state)
 283 {
 284         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 285
 286         return ifcvf_set_vq_state(vf, qid, state->split.avail_index);
 287 }
 288
 289 static void ifcvf_vdpa_set_vq_cb(struct vdpa_device *vdpa_dev, u16 qid,
 290                                  struct vdpa_callback *cb)
 291 {
 292         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 293
 294         vf->vring[qid].cb = *cb;
 295 }
 296
 297 static void ifcvf_vdpa_set_vq_ready(struct vdpa_device *vdpa_dev,
 298                                     u16 qid, bool ready)
 299 {
 300         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 301
 302         vf->vring[qid].ready = ready;
 303 }
 304
 305 static bool ifcvf_vdpa_get_vq_ready(struct vdpa_device *vdpa_dev, u16 qid)
 306 {
 307         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 308
 309         return vf->vring[qid].ready;
 310 }
 311
 312 static void ifcvf_vdpa_set_vq_num(struct vdpa_device *vdpa_dev, u16 qid,
 313                                   u32 num)
 314 {
 315         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 316
 317         vf->vring[qid].size = num;
 318 }
 319
 320 static int ifcvf_vdpa_set_vq_address(struct vdpa_device *vdpa_dev, u16 qid,
 321                                      u64 desc_area, u64 driver_area,
 322                                      u64 device_area)
 323 {
 324         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 325
 326         vf->vring[qid].desc = desc_area;
 327         vf->vring[qid].avail = driver_area;
 328         vf->vring[qid].used = device_area;
 329
 330         return 0;
 331 }
 332
 333 static void ifcvf_vdpa_kick_vq(struct vdpa_device *vdpa_dev, u16 qid)
 334 {
 335         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 336
 337         ifcvf_notify_queue(vf, qid);
 338 }
 339
 340 static u32 ifcvf_vdpa_get_generation(struct vdpa_device *vdpa_dev)
 341 {
 342         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 343
 344         return ioread8(&vf->common_cfg->config_generation);
 345 }
 346
 347 static u32 ifcvf_vdpa_get_device_id(struct vdpa_device *vdpa_dev)
 348 {
 349         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 350
 351         return vf->dev_type;
 352 }
 353
 354 static u32 ifcvf_vdpa_get_vendor_id(struct vdpa_device *vdpa_dev)
 355 {
 356         struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
 357         struct pci_dev *pdev = adapter->pdev;
 358
 359         return pdev->subsystem_vendor;
 360 }
 361
 362 static u32 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
 363 {
 364         return IFCVF_QUEUE_ALIGNMENT;
 365 }
 366
 367 static size_t ifcvf_vdpa_get_config_size(struct vdpa_device *vdpa_dev)
 368 {
 369         struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
 370         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 371         struct pci_dev *pdev = adapter->pdev;
 372         size_t size;
 373
 374         switch (vf->dev_type) {
 375         case VIRTIO_ID_NET:
 376                 size = sizeof(struct virtio_net_config);
 377                 break;
 378         case VIRTIO_ID_BLOCK:
 379                 size = sizeof(struct virtio_blk_config);
 380                 break;
 381         default:
 382                 size = 0;
 383                 IFCVF_ERR(pdev, "VIRTIO ID %u not supported\n", vf->dev_type);
 384         }
 385
 386         return size;
 387 }
 388
 389 static void ifcvf_vdpa_get_config(struct vdpa_device *vdpa_dev,
 390                                   unsigned int offset,
 391                                   void *buf, unsigned int len)
 392 {
 393         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 394
 395         WARN_ON(offset + len > sizeof(struct virtio_net_config));
 396         ifcvf_read_net_config(vf, offset, buf, len);
 397 }
 398
 399 static void ifcvf_vdpa_set_config(struct vdpa_device *vdpa_dev,
 400                                   unsigned int offset, const void *buf,
 401                                   unsigned int len)
 402 {
 403         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 404
 405         WARN_ON(offset + len > sizeof(struct virtio_net_config));
 406         ifcvf_write_net_config(vf, offset, buf, len);
 407 }
 408
 409 static void ifcvf_vdpa_set_config_cb(struct vdpa_device *vdpa_dev,
 410                                      struct vdpa_callback *cb)
 411 {
 412         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 413
 414         vf->config_cb.callback = cb->callback;
 415         vf->config_cb.private = cb->private;
 416 }
 417
 418 static int ifcvf_vdpa_get_vq_irq(struct vdpa_device *vdpa_dev,
 419                                  u16 qid)
 420 {
 421         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 422
 423         return vf->vring[qid].irq;
 424 }
 425
 426 static struct vdpa_notification_area ifcvf_get_vq_notification(struct vdpa_device *vdpa_dev,
 427                                                                u16 idx)
 428 {
 429         struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 430         struct vdpa_notification_area area;
 431
 432         area.addr = vf->vring[idx].notify_pa;
 433         if (!vf->notify_off_multiplier)
 434                 area.size = PAGE_SIZE;
 435         else
 436                 area.size = vf->notify_off_multiplier;
 437
 438         return area;
 439 }
 440
 441 /*
 442  * IFCVF currently does't have on-chip IOMMU, so not
 443  * implemented set_map()/dma_map()/dma_unmap()
 444  */
 445 static const struct vdpa_config_ops ifc_vdpa_ops = {
 446         .get_features   = ifcvf_vdpa_get_features,
 447         .set_features   = ifcvf_vdpa_set_features,
 448         .get_status     = ifcvf_vdpa_get_status,
 449         .set_status     = ifcvf_vdpa_set_status,
 450         .reset          = ifcvf_vdpa_reset,
 451         .get_vq_num_max = ifcvf_vdpa_get_vq_num_max,
 452         .get_vq_state   = ifcvf_vdpa_get_vq_state,
 453         .set_vq_state   = ifcvf_vdpa_set_vq_state,
 454         .set_vq_cb      = ifcvf_vdpa_set_vq_cb,
 455         .set_vq_ready   = ifcvf_vdpa_set_vq_ready,
 456         .get_vq_ready   = ifcvf_vdpa_get_vq_ready,
 457         .set_vq_num     = ifcvf_vdpa_set_vq_num,
 458         .set_vq_address = ifcvf_vdpa_set_vq_address,
 459         .get_vq_irq     = ifcvf_vdpa_get_vq_irq,
 460         .kick_vq        = ifcvf_vdpa_kick_vq,
 461         .get_generation = ifcvf_vdpa_get_generation,
 462         .get_device_id  = ifcvf_vdpa_get_device_id,
 463         .get_vendor_id  = ifcvf_vdpa_get_vendor_id,
 464         .get_vq_align   = ifcvf_vdpa_get_vq_align,
 465         .get_config_size        = ifcvf_vdpa_get_config_size,
 466         .get_config     = ifcvf_vdpa_get_config,
 467         .set_config     = ifcvf_vdpa_set_config,
 468         .set_config_cb  = ifcvf_vdpa_set_config_cb,
 469         .get_vq_notification = ifcvf_get_vq_notification,
 470 };
 471
 472 static struct virtio_device_id id_table_net[] = {
 473         {VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID},
 474         {0},
 475 };
 476
 477 static struct virtio_device_id id_table_blk[] = {
 478         {VIRTIO_ID_BLOCK, VIRTIO_DEV_ANY_ID},
 479         {0},
 480 };
 481
 482 static u32 get_dev_type(struct pci_dev *pdev)
 483 {
 484         u32 dev_type;
 485
 486         /* This drirver drives both modern virtio devices and transitional
 487          * devices in modern mode.
 488          * vDPA requires feature bit VIRTIO_F_ACCESS_PLATFORM,
 489          * so legacy devices and transitional devices in legacy
 490          * mode will not work for vDPA, this driver will not
 491          * drive devices with legacy interface.
 492          */
 493
 494         if (pdev->device < 0x1040)
 495                 dev_type =  pdev->subsystem_device;
 496         else
 497                 dev_type =  pdev->device - 0x1040;
 498
 499         return dev_type;
 500 }
 501
 502 static int ifcvf_vdpa_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
 503                               const struct vdpa_dev_set_config *config)
 504 {
 505         struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
 506         struct ifcvf_adapter *adapter;
 507         struct pci_dev *pdev;
 508         struct ifcvf_hw *vf;
 509         struct device *dev;
 510         int ret, i;
 511
 512         ifcvf_mgmt_dev = container_of(mdev, struct ifcvf_vdpa_mgmt_dev, mdev);
 513         if (ifcvf_mgmt_dev->adapter)
 514                 return -EOPNOTSUPP;
 515
 516         pdev = ifcvf_mgmt_dev->pdev;
 517         dev = &pdev->dev;
 518         adapter = vdpa_alloc_device(struct ifcvf_adapter, vdpa,
 519                                     dev, &ifc_vdpa_ops, name, false);
 520         if (IS_ERR(adapter)) {
 521                 IFCVF_ERR(pdev, "Failed to allocate vDPA structure");
 522                 return PTR_ERR(adapter);
 523         }
 524
 525         ifcvf_mgmt_dev->adapter = adapter;
 526         pci_set_drvdata(pdev, ifcvf_mgmt_dev);
 527
 528         vf = &adapter->vf;
 529         vf->dev_type = get_dev_type(pdev);
 530         vf->base = pcim_iomap_table(pdev);
 531
 532         adapter->pdev = pdev;
 533         adapter->vdpa.dma_dev = &pdev->dev;
 534
 535         ret = ifcvf_init_hw(vf, pdev);
 536         if (ret) {
 537                 IFCVF_ERR(pdev, "Failed to init IFCVF hw\n");
 538                 goto err;
 539         }
 540
 541         for (i = 0; i < vf->nr_vring; i++)
 542                 vf->vring[i].irq = -EINVAL;
 543
 544         vf->hw_features = ifcvf_get_hw_features(vf);
 545
 546         adapter->vdpa.mdev = &ifcvf_mgmt_dev->mdev;
 547         ret = _vdpa_register_device(&adapter->vdpa, vf->nr_vring);
 548         if (ret) {
 549                 IFCVF_ERR(pdev, "Failed to register to vDPA bus");
 550                 goto err;
 551         }
 552
 553         return 0;
 554
 555 err:
 556         put_device(&adapter->vdpa.dev);
 557         return ret;
 558 }
 559
 560 static void ifcvf_vdpa_dev_del(struct vdpa_mgmt_dev *mdev, struct vdpa_device *dev)
 561 {
 562         struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
 563
 564         ifcvf_mgmt_dev = container_of(mdev, struct ifcvf_vdpa_mgmt_dev, mdev);
 565         _vdpa_unregister_device(dev);
 566         ifcvf_mgmt_dev->adapter = NULL;
 567 }
 568
 569 static const struct vdpa_mgmtdev_ops ifcvf_vdpa_mgmt_dev_ops = {
 570         .dev_add = ifcvf_vdpa_dev_add,
 571         .dev_del = ifcvf_vdpa_dev_del
 572 };
 573
 574 static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 575 {
 576         struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
 577         struct device *dev = &pdev->dev;
 578         u32 dev_type;
 579         int ret;
 580
 581         ifcvf_mgmt_dev = kzalloc(sizeof(struct ifcvf_vdpa_mgmt_dev), GFP_KERNEL);
 582         if (!ifcvf_mgmt_dev) {
 583                 IFCVF_ERR(pdev, "Failed to alloc memory for the vDPA management device\n");
 584                 return -ENOMEM;
 585         }
 586
 587         dev_type = get_dev_type(pdev);
 588         switch (dev_type) {
 589         case VIRTIO_ID_NET:
 590                 ifcvf_mgmt_dev->mdev.id_table = id_table_net;
 591                 break;
 592         case VIRTIO_ID_BLOCK:
 593                 ifcvf_mgmt_dev->mdev.id_table = id_table_blk;
 594                 break;
 595         default:
 596                 IFCVF_ERR(pdev, "VIRTIO ID %u not supported\n", dev_type);
 597                 ret = -EOPNOTSUPP;
 598                 goto err;
 599         }
 600
 601         ifcvf_mgmt_dev->mdev.ops = &ifcvf_vdpa_mgmt_dev_ops;
 602         ifcvf_mgmt_dev->mdev.device = dev;
 603         ifcvf_mgmt_dev->pdev = pdev;
 604
 605         ret = pcim_enable_device(pdev);
 606         if (ret) {
 607                 IFCVF_ERR(pdev, "Failed to enable device\n");
 608                 goto err;
 609         }
 610
 611         ret = pcim_iomap_regions(pdev, BIT(0) | BIT(2) | BIT(4),
 612                                  IFCVF_DRIVER_NAME);
 613         if (ret) {
 614                 IFCVF_ERR(pdev, "Failed to request MMIO region\n");
 615                 goto err;
 616         }
 617
 618         ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
 619         if (ret) {
 620                 IFCVF_ERR(pdev, "No usable DMA configuration\n");
 621                 goto err;
 622         }
 623
 624         ret = devm_add_action_or_reset(dev, ifcvf_free_irq_vectors, pdev);
 625         if (ret) {
 626                 IFCVF_ERR(pdev,
 627                           "Failed for adding devres for freeing irq vectors\n");
 628                 goto err;
 629         }
 630
 631         pci_set_master(pdev);
 632
 633         ret = vdpa_mgmtdev_register(&ifcvf_mgmt_dev->mdev);
 634         if (ret) {
 635                 IFCVF_ERR(pdev,
 636                           "Failed to initialize the management interfaces\n");
 637                 goto err;
 638         }
 639
 640         return 0;
 641
 642 err:
 643         kfree(ifcvf_mgmt_dev);
 644         return ret;
 645 }
 646
 647 static void ifcvf_remove(struct pci_dev *pdev)
 648 {
 649         struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
 650
 651         ifcvf_mgmt_dev = pci_get_drvdata(pdev);
 652         vdpa_mgmtdev_unregister(&ifcvf_mgmt_dev->mdev);
 653         kfree(ifcvf_mgmt_dev);
 654 }
 655
 656 static struct pci_device_id ifcvf_pci_ids[] = {
 657         /* N3000 network device */
 658         { PCI_DEVICE_SUB(PCI_VENDOR_ID_REDHAT_QUMRANET,
 659                          N3000_DEVICE_ID,
 660                          PCI_VENDOR_ID_INTEL,
 661                          N3000_SUBSYS_DEVICE_ID) },
 662         /* C5000X-PL network device */
 663         { PCI_DEVICE_SUB(PCI_VENDOR_ID_REDHAT_QUMRANET,
 664                          VIRTIO_TRANS_ID_NET,
 665                          PCI_VENDOR_ID_INTEL,
 666                          VIRTIO_ID_NET) },
 667         /* C5000X-PL block device */
 668         { PCI_DEVICE_SUB(PCI_VENDOR_ID_REDHAT_QUMRANET,
 669                          VIRTIO_TRANS_ID_BLOCK,
 670                          PCI_VENDOR_ID_INTEL,
 671                          VIRTIO_ID_BLOCK) },
 672
 673         { 0 },
 674 };
 675 MODULE_DEVICE_TABLE(pci, ifcvf_pci_ids);
 676
 677 static struct pci_driver ifcvf_driver = {
 678         .name     = IFCVF_DRIVER_NAME,
 679         .id_table = ifcvf_pci_ids,
 680         .probe    = ifcvf_probe,
 681         .remove   = ifcvf_remove,
 682 };
 683
 684 module_pci_driver(ifcvf_driver);
 685
 686 MODULE_LICENSE("GPL v2");