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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * vDPA bridge driver for modern virtio-pci device4 *5 * Copyright (c) 2020, Red Hat Inc. All rights reserved.6 * Author: Jason Wang <jasowang@redhat.com>7 *8 * Based on virtio_pci_modern.c.9 */10 11#include <linux/interrupt.h>12#include <linux/module.h>13#include <linux/pci.h>14#include <linux/vdpa.h>15#include <linux/virtio.h>16#include <linux/virtio_config.h>17#include <linux/virtio_ring.h>18#include <linux/virtio_pci.h>19#include <linux/virtio_pci_modern.h>20#include <uapi/linux/vdpa.h>21 22#define VP_VDPA_QUEUE_MAX 25623#define VP_VDPA_DRIVER_NAME "vp_vdpa"24#define VP_VDPA_NAME_SIZE 25625 26struct vp_vring {27 void __iomem *notify;28 char msix_name[VP_VDPA_NAME_SIZE];29 struct vdpa_callback cb;30 resource_size_t notify_pa;31 int irq;32};33 34struct vp_vdpa {35 struct vdpa_device vdpa;36 struct virtio_pci_modern_device *mdev;37 struct vp_vring *vring;38 struct vdpa_callback config_cb;39 u64 device_features;40 char msix_name[VP_VDPA_NAME_SIZE];41 int config_irq;42 int queues;43 int vectors;44};45 46struct vp_vdpa_mgmtdev {47 struct vdpa_mgmt_dev mgtdev;48 struct virtio_pci_modern_device *mdev;49 struct vp_vdpa *vp_vdpa;50};51 52static struct vp_vdpa *vdpa_to_vp(struct vdpa_device *vdpa)53{54 return container_of(vdpa, struct vp_vdpa, vdpa);55}56 57static struct virtio_pci_modern_device *vdpa_to_mdev(struct vdpa_device *vdpa)58{59 struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);60 61 return vp_vdpa->mdev;62}63 64static struct virtio_pci_modern_device *vp_vdpa_to_mdev(struct vp_vdpa *vp_vdpa)65{66 return vp_vdpa->mdev;67}68 69static u64 vp_vdpa_get_device_features(struct vdpa_device *vdpa)70{71 struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);72 73 return vp_vdpa->device_features;74}75 76static int vp_vdpa_set_driver_features(struct vdpa_device *vdpa, u64 features)77{78 struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);79 80 vp_modern_set_features(mdev, features);81 82 return 0;83}84 85static u64 vp_vdpa_get_driver_features(struct vdpa_device *vdpa)86{87 struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);88 89 return vp_modern_get_driver_features(mdev);90}91 92static u8 vp_vdpa_get_status(struct vdpa_device *vdpa)93{94 struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);95 96 return vp_modern_get_status(mdev);97}98 99static int vp_vdpa_get_vq_irq(struct vdpa_device *vdpa, u16 idx)100{101 struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);102 int irq = vp_vdpa->vring[idx].irq;103 104 if (irq == VIRTIO_MSI_NO_VECTOR)105 return -EINVAL;106 107 return irq;108}109 110static void vp_vdpa_free_irq(struct vp_vdpa *vp_vdpa)111{112 struct virtio_pci_modern_device *mdev = vp_vdpa_to_mdev(vp_vdpa);113 struct pci_dev *pdev = mdev->pci_dev;114 int i;115 116 for (i = 0; i < vp_vdpa->queues; i++) {117 if (vp_vdpa->vring[i].irq != VIRTIO_MSI_NO_VECTOR) {118 vp_modern_queue_vector(mdev, i, VIRTIO_MSI_NO_VECTOR);119 devm_free_irq(&pdev->dev, vp_vdpa->vring[i].irq,120 &vp_vdpa->vring[i]);121 vp_vdpa->vring[i].irq = VIRTIO_MSI_NO_VECTOR;122 }123 }124 125 if (vp_vdpa->config_irq != VIRTIO_MSI_NO_VECTOR) {126 vp_modern_config_vector(mdev, VIRTIO_MSI_NO_VECTOR);127 devm_free_irq(&pdev->dev, vp_vdpa->config_irq, vp_vdpa);128 vp_vdpa->config_irq = VIRTIO_MSI_NO_VECTOR;129 }130 131 if (vp_vdpa->vectors) {132 pci_free_irq_vectors(pdev);133 vp_vdpa->vectors = 0;134 }135}136 137static irqreturn_t vp_vdpa_vq_handler(int irq, void *arg)138{139 struct vp_vring *vring = arg;140 141 if (vring->cb.callback)142 return vring->cb.callback(vring->cb.private);143 144 return IRQ_HANDLED;145}146 147static irqreturn_t vp_vdpa_config_handler(int irq, void *arg)148{149 struct vp_vdpa *vp_vdpa = arg;150 151 if (vp_vdpa->config_cb.callback)152 return vp_vdpa->config_cb.callback(vp_vdpa->config_cb.private);153 154 return IRQ_HANDLED;155}156 157static int vp_vdpa_request_irq(struct vp_vdpa *vp_vdpa)158{159 struct virtio_pci_modern_device *mdev = vp_vdpa_to_mdev(vp_vdpa);160 struct pci_dev *pdev = mdev->pci_dev;161 int i, ret, irq;162 int queues = vp_vdpa->queues;163 int vectors = 1;164 int msix_vec = 0;165 166 for (i = 0; i < queues; i++) {167 if (vp_vdpa->vring[i].cb.callback)168 vectors++;169 }170 171 ret = pci_alloc_irq_vectors(pdev, vectors, vectors, PCI_IRQ_MSIX);172 if (ret != vectors) {173 dev_err(&pdev->dev,174 "vp_vdpa: fail to allocate irq vectors want %d but %d\n",175 vectors, ret);176 return ret;177 }178 179 vp_vdpa->vectors = vectors;180 181 for (i = 0; i < queues; i++) {182 if (!vp_vdpa->vring[i].cb.callback)183 continue;184 185 snprintf(vp_vdpa->vring[i].msix_name, VP_VDPA_NAME_SIZE,186 "vp-vdpa[%s]-%d\n", pci_name(pdev), i);187 irq = pci_irq_vector(pdev, msix_vec);188 ret = devm_request_irq(&pdev->dev, irq,189 vp_vdpa_vq_handler,190 0, vp_vdpa->vring[i].msix_name,191 &vp_vdpa->vring[i]);192 if (ret) {193 dev_err(&pdev->dev,194 "vp_vdpa: fail to request irq for vq %d\n", i);195 goto err;196 }197 vp_modern_queue_vector(mdev, i, msix_vec);198 vp_vdpa->vring[i].irq = irq;199 msix_vec++;200 }201 202 snprintf(vp_vdpa->msix_name, VP_VDPA_NAME_SIZE, "vp-vdpa[%s]-config\n",203 pci_name(pdev));204 irq = pci_irq_vector(pdev, msix_vec);205 ret = devm_request_irq(&pdev->dev, irq, vp_vdpa_config_handler, 0,206 vp_vdpa->msix_name, vp_vdpa);207 if (ret) {208 dev_err(&pdev->dev,209 "vp_vdpa: fail to request irq for config: %d\n", ret);210 goto err;211 }212 vp_modern_config_vector(mdev, msix_vec);213 vp_vdpa->config_irq = irq;214 215 return 0;216err:217 vp_vdpa_free_irq(vp_vdpa);218 return ret;219}220 221static void vp_vdpa_set_status(struct vdpa_device *vdpa, u8 status)222{223 struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);224 struct virtio_pci_modern_device *mdev = vp_vdpa_to_mdev(vp_vdpa);225 u8 s = vp_vdpa_get_status(vdpa);226 227 if (status & VIRTIO_CONFIG_S_DRIVER_OK &&228 !(s & VIRTIO_CONFIG_S_DRIVER_OK)) {229 if (vp_vdpa_request_irq(vp_vdpa)) {230 WARN_ON(1);231 return;232 }233 }234 235 vp_modern_set_status(mdev, status);236}237 238static int vp_vdpa_reset(struct vdpa_device *vdpa)239{240 struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);241 struct virtio_pci_modern_device *mdev = vp_vdpa_to_mdev(vp_vdpa);242 u8 s = vp_vdpa_get_status(vdpa);243 244 vp_modern_set_status(mdev, 0);245 246 if (s & VIRTIO_CONFIG_S_DRIVER_OK)247 vp_vdpa_free_irq(vp_vdpa);248 249 return 0;250}251 252static u16 vp_vdpa_get_vq_num_max(struct vdpa_device *vdpa)253{254 return VP_VDPA_QUEUE_MAX;255}256 257static int vp_vdpa_get_vq_state(struct vdpa_device *vdpa, u16 qid,258 struct vdpa_vq_state *state)259{260 /* Note that this is not supported by virtio specification, so261 * we return -EOPNOTSUPP here. This means we can't support live262 * migration, vhost device start/stop.263 */264 return -EOPNOTSUPP;265}266 267static int vp_vdpa_set_vq_state_split(struct vdpa_device *vdpa,268 const struct vdpa_vq_state *state)269{270 const struct vdpa_vq_state_split *split = &state->split;271 272 if (split->avail_index == 0)273 return 0;274 275 return -EOPNOTSUPP;276}277 278static int vp_vdpa_set_vq_state_packed(struct vdpa_device *vdpa,279 const struct vdpa_vq_state *state)280{281 const struct vdpa_vq_state_packed *packed = &state->packed;282 283 if (packed->last_avail_counter == 1 &&284 packed->last_avail_idx == 0 &&285 packed->last_used_counter == 1 &&286 packed->last_used_idx == 0)287 return 0;288 289 return -EOPNOTSUPP;290}291 292static int vp_vdpa_set_vq_state(struct vdpa_device *vdpa, u16 qid,293 const struct vdpa_vq_state *state)294{295 struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);296 297 /* Note that this is not supported by virtio specification.298 * But if the state is by chance equal to the device initial299 * state, we can let it go.300 */301 if ((vp_modern_get_status(mdev) & VIRTIO_CONFIG_S_FEATURES_OK) &&302 !vp_modern_get_queue_enable(mdev, qid)) {303 if (vp_modern_get_driver_features(mdev) &304 BIT_ULL(VIRTIO_F_RING_PACKED))305 return vp_vdpa_set_vq_state_packed(vdpa, state);306 else307 return vp_vdpa_set_vq_state_split(vdpa, state);308 }309 310 return -EOPNOTSUPP;311}312 313static void vp_vdpa_set_vq_cb(struct vdpa_device *vdpa, u16 qid,314 struct vdpa_callback *cb)315{316 struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);317 318 vp_vdpa->vring[qid].cb = *cb;319}320 321static void vp_vdpa_set_vq_ready(struct vdpa_device *vdpa,322 u16 qid, bool ready)323{324 struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);325 326 vp_modern_set_queue_enable(mdev, qid, ready);327}328 329static bool vp_vdpa_get_vq_ready(struct vdpa_device *vdpa, u16 qid)330{331 struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);332 333 return vp_modern_get_queue_enable(mdev, qid);334}335 336static void vp_vdpa_set_vq_num(struct vdpa_device *vdpa, u16 qid,337 u32 num)338{339 struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);340 341 vp_modern_set_queue_size(mdev, qid, num);342}343 344static u16 vp_vdpa_get_vq_size(struct vdpa_device *vdpa, u16 qid)345{346 struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);347 348 return vp_modern_get_queue_size(mdev, qid);349}350 351static int vp_vdpa_set_vq_address(struct vdpa_device *vdpa, u16 qid,352 u64 desc_area, u64 driver_area,353 u64 device_area)354{355 struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);356 357 vp_modern_queue_address(mdev, qid, desc_area,358 driver_area, device_area);359 360 return 0;361}362 363static void vp_vdpa_kick_vq(struct vdpa_device *vdpa, u16 qid)364{365 struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);366 367 vp_iowrite16(qid, vp_vdpa->vring[qid].notify);368}369 370static u32 vp_vdpa_get_generation(struct vdpa_device *vdpa)371{372 struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);373 374 return vp_modern_generation(mdev);375}376 377static u32 vp_vdpa_get_device_id(struct vdpa_device *vdpa)378{379 struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);380 381 return mdev->id.device;382}383 384static u32 vp_vdpa_get_vendor_id(struct vdpa_device *vdpa)385{386 struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);387 388 return mdev->id.vendor;389}390 391static u32 vp_vdpa_get_vq_align(struct vdpa_device *vdpa)392{393 return PAGE_SIZE;394}395 396static size_t vp_vdpa_get_config_size(struct vdpa_device *vdpa)397{398 struct virtio_pci_modern_device *mdev = vdpa_to_mdev(vdpa);399 400 return mdev->device_len;401}402 403static void vp_vdpa_get_config(struct vdpa_device *vdpa,404 unsigned int offset,405 void *buf, unsigned int len)406{407 struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);408 struct virtio_pci_modern_device *mdev = vp_vdpa_to_mdev(vp_vdpa);409 u8 old, new;410 u8 *p;411 int i;412 413 do {414 old = vp_ioread8(&mdev->common->config_generation);415 p = buf;416 for (i = 0; i < len; i++)417 *p++ = vp_ioread8(mdev->device + offset + i);418 419 new = vp_ioread8(&mdev->common->config_generation);420 } while (old != new);421}422 423static void vp_vdpa_set_config(struct vdpa_device *vdpa,424 unsigned int offset, const void *buf,425 unsigned int len)426{427 struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);428 struct virtio_pci_modern_device *mdev = vp_vdpa_to_mdev(vp_vdpa);429 const u8 *p = buf;430 int i;431 432 for (i = 0; i < len; i++)433 vp_iowrite8(*p++, mdev->device + offset + i);434}435 436static void vp_vdpa_set_config_cb(struct vdpa_device *vdpa,437 struct vdpa_callback *cb)438{439 struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);440 441 vp_vdpa->config_cb = *cb;442}443 444static struct vdpa_notification_area445vp_vdpa_get_vq_notification(struct vdpa_device *vdpa, u16 qid)446{447 struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);448 struct virtio_pci_modern_device *mdev = vp_vdpa_to_mdev(vp_vdpa);449 struct vdpa_notification_area notify;450 451 notify.addr = vp_vdpa->vring[qid].notify_pa;452 notify.size = mdev->notify_offset_multiplier;453 454 return notify;455}456 457static const struct vdpa_config_ops vp_vdpa_ops = {458 .get_device_features = vp_vdpa_get_device_features,459 .set_driver_features = vp_vdpa_set_driver_features,460 .get_driver_features = vp_vdpa_get_driver_features,461 .get_status = vp_vdpa_get_status,462 .set_status = vp_vdpa_set_status,463 .reset = vp_vdpa_reset,464 .get_vq_num_max = vp_vdpa_get_vq_num_max,465 .get_vq_state = vp_vdpa_get_vq_state,466 .get_vq_notification = vp_vdpa_get_vq_notification,467 .set_vq_state = vp_vdpa_set_vq_state,468 .set_vq_cb = vp_vdpa_set_vq_cb,469 .set_vq_ready = vp_vdpa_set_vq_ready,470 .get_vq_ready = vp_vdpa_get_vq_ready,471 .set_vq_num = vp_vdpa_set_vq_num,472 .get_vq_size = vp_vdpa_get_vq_size,473 .set_vq_address = vp_vdpa_set_vq_address,474 .kick_vq = vp_vdpa_kick_vq,475 .get_generation = vp_vdpa_get_generation,476 .get_device_id = vp_vdpa_get_device_id,477 .get_vendor_id = vp_vdpa_get_vendor_id,478 .get_vq_align = vp_vdpa_get_vq_align,479 .get_config_size = vp_vdpa_get_config_size,480 .get_config = vp_vdpa_get_config,481 .set_config = vp_vdpa_set_config,482 .set_config_cb = vp_vdpa_set_config_cb,483 .get_vq_irq = vp_vdpa_get_vq_irq,484};485 486static void vp_vdpa_free_irq_vectors(void *data)487{488 pci_free_irq_vectors(data);489}490 491static int vp_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name,492 const struct vdpa_dev_set_config *add_config)493{494 struct vp_vdpa_mgmtdev *vp_vdpa_mgtdev =495 container_of(v_mdev, struct vp_vdpa_mgmtdev, mgtdev);496 497 struct virtio_pci_modern_device *mdev = vp_vdpa_mgtdev->mdev;498 struct pci_dev *pdev = mdev->pci_dev;499 struct device *dev = &pdev->dev;500 struct vp_vdpa *vp_vdpa = NULL;501 u64 device_features;502 int ret, i;503 504 vp_vdpa = vdpa_alloc_device(struct vp_vdpa, vdpa,505 dev, &vp_vdpa_ops, 1, 1, name, false);506 507 if (IS_ERR(vp_vdpa)) {508 dev_err(dev, "vp_vdpa: Failed to allocate vDPA structure\n");509 return PTR_ERR(vp_vdpa);510 }511 512 vp_vdpa_mgtdev->vp_vdpa = vp_vdpa;513 514 vp_vdpa->vdpa.dma_dev = &pdev->dev;515 vp_vdpa->queues = vp_modern_get_num_queues(mdev);516 vp_vdpa->mdev = mdev;517 518 device_features = vp_modern_get_features(mdev);519 if (add_config->mask & BIT_ULL(VDPA_ATTR_DEV_FEATURES)) {520 if (add_config->device_features & ~device_features) {521 ret = -EINVAL;522 dev_err(&pdev->dev, "Try to provision features "523 "that are not supported by the device: "524 "device_features 0x%llx provisioned 0x%llx\n",525 device_features, add_config->device_features);526 goto err;527 }528 device_features = add_config->device_features;529 }530 vp_vdpa->device_features = device_features;531 532 ret = devm_add_action_or_reset(dev, vp_vdpa_free_irq_vectors, pdev);533 if (ret) {534 dev_err(&pdev->dev,535 "Failed for adding devres for freeing irq vectors\n");536 goto err;537 }538 539 vp_vdpa->vring = devm_kcalloc(&pdev->dev, vp_vdpa->queues,540 sizeof(*vp_vdpa->vring),541 GFP_KERNEL);542 if (!vp_vdpa->vring) {543 ret = -ENOMEM;544 dev_err(&pdev->dev, "Fail to allocate virtqueues\n");545 goto err;546 }547 548 for (i = 0; i < vp_vdpa->queues; i++) {549 vp_vdpa->vring[i].irq = VIRTIO_MSI_NO_VECTOR;550 vp_vdpa->vring[i].notify =551 vp_modern_map_vq_notify(mdev, i,552 &vp_vdpa->vring[i].notify_pa);553 if (!vp_vdpa->vring[i].notify) {554 ret = -EINVAL;555 dev_warn(&pdev->dev, "Fail to map vq notify %d\n", i);556 goto err;557 }558 }559 vp_vdpa->config_irq = VIRTIO_MSI_NO_VECTOR;560 561 vp_vdpa->vdpa.mdev = &vp_vdpa_mgtdev->mgtdev;562 ret = _vdpa_register_device(&vp_vdpa->vdpa, vp_vdpa->queues);563 if (ret) {564 dev_err(&pdev->dev, "Failed to register to vdpa bus\n");565 goto err;566 }567 568 return 0;569 570err:571 put_device(&vp_vdpa->vdpa.dev);572 return ret;573}574 575static void vp_vdpa_dev_del(struct vdpa_mgmt_dev *v_mdev,576 struct vdpa_device *dev)577{578 struct vp_vdpa_mgmtdev *vp_vdpa_mgtdev =579 container_of(v_mdev, struct vp_vdpa_mgmtdev, mgtdev);580 581 struct vp_vdpa *vp_vdpa = vp_vdpa_mgtdev->vp_vdpa;582 583 _vdpa_unregister_device(&vp_vdpa->vdpa);584 vp_vdpa_mgtdev->vp_vdpa = NULL;585}586 587static const struct vdpa_mgmtdev_ops vp_vdpa_mdev_ops = {588 .dev_add = vp_vdpa_dev_add,589 .dev_del = vp_vdpa_dev_del,590};591 592static int vp_vdpa_probe(struct pci_dev *pdev, const struct pci_device_id *id)593{594 struct vp_vdpa_mgmtdev *vp_vdpa_mgtdev = NULL;595 struct vdpa_mgmt_dev *mgtdev;596 struct device *dev = &pdev->dev;597 struct virtio_pci_modern_device *mdev = NULL;598 struct virtio_device_id *mdev_id = NULL;599 int err;600 601 vp_vdpa_mgtdev = kzalloc(sizeof(*vp_vdpa_mgtdev), GFP_KERNEL);602 if (!vp_vdpa_mgtdev)603 return -ENOMEM;604 605 mgtdev = &vp_vdpa_mgtdev->mgtdev;606 mgtdev->ops = &vp_vdpa_mdev_ops;607 mgtdev->device = dev;608 609 mdev = kzalloc(sizeof(struct virtio_pci_modern_device), GFP_KERNEL);610 if (!mdev) {611 err = -ENOMEM;612 goto mdev_err;613 }614 615 /*616 * id_table should be a null terminated array, so allocate one additional617 * entry here, see vdpa_mgmtdev_get_classes().618 */619 mdev_id = kcalloc(2, sizeof(struct virtio_device_id), GFP_KERNEL);620 if (!mdev_id) {621 err = -ENOMEM;622 goto mdev_id_err;623 }624 625 vp_vdpa_mgtdev->mdev = mdev;626 mdev->pci_dev = pdev;627 628 err = pcim_enable_device(pdev);629 if (err) {630 goto probe_err;631 }632 633 err = vp_modern_probe(mdev);634 if (err) {635 dev_err(&pdev->dev, "Failed to probe modern PCI device\n");636 goto probe_err;637 }638 639 mdev_id[0].device = mdev->id.device;640 mdev_id[0].vendor = mdev->id.vendor;641 mgtdev->id_table = mdev_id;642 mgtdev->max_supported_vqs = vp_modern_get_num_queues(mdev);643 mgtdev->supported_features = vp_modern_get_features(mdev);644 mgtdev->config_attr_mask = (1 << VDPA_ATTR_DEV_FEATURES);645 pci_set_master(pdev);646 pci_set_drvdata(pdev, vp_vdpa_mgtdev);647 648 err = vdpa_mgmtdev_register(mgtdev);649 if (err) {650 dev_err(&pdev->dev, "Failed to register vdpa mgmtdev device\n");651 goto register_err;652 }653 654 return 0;655 656register_err:657 vp_modern_remove(vp_vdpa_mgtdev->mdev);658probe_err:659 kfree(mdev_id);660mdev_id_err:661 kfree(mdev);662mdev_err:663 kfree(vp_vdpa_mgtdev);664 return err;665}666 667static void vp_vdpa_remove(struct pci_dev *pdev)668{669 struct vp_vdpa_mgmtdev *vp_vdpa_mgtdev = pci_get_drvdata(pdev);670 struct virtio_pci_modern_device *mdev = NULL;671 672 mdev = vp_vdpa_mgtdev->mdev;673 vdpa_mgmtdev_unregister(&vp_vdpa_mgtdev->mgtdev);674 vp_modern_remove(mdev);675 kfree(vp_vdpa_mgtdev->mgtdev.id_table);676 kfree(mdev);677 kfree(vp_vdpa_mgtdev);678}679 680static struct pci_driver vp_vdpa_driver = {681 .name = "vp-vdpa",682 .id_table = NULL, /* only dynamic ids */683 .probe = vp_vdpa_probe,684 .remove = vp_vdpa_remove,685};686 687module_pci_driver(vp_vdpa_driver);688 689MODULE_AUTHOR("Jason Wang <jasowang@redhat.com>");690MODULE_DESCRIPTION("vp-vdpa");691MODULE_LICENSE("GPL");692MODULE_VERSION("1");693