1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_VDPA_H 3 #define _LINUX_VDPA_H 4 5 #include <linux/kernel.h> 6 #include <linux/device.h> 7 #include <linux/interrupt.h> 8 #include <linux/virtio.h> 9 #include <linux/vhost_iotlb.h> 10 #include <linux/virtio_net.h> 11 #include <linux/virtio_blk.h> 12 #include <linux/if_ether.h> 13 14 /** 15 * struct vdpa_callback - vDPA callback definition. 16 * @callback: interrupt callback function 17 * @private: the data passed to the callback function 18 * @trigger: the eventfd for the callback (Optional). 19 * When it is set, the vDPA driver must guarantee that 20 * signaling it is functional equivalent to triggering 21 * the callback. Then vDPA parent can signal it directly 22 * instead of triggering the callback. 23 */ 24 struct vdpa_callback { 25 irqreturn_t (*callback)(void *data); 26 void *private; 27 struct eventfd_ctx *trigger; 28 }; 29 30 /** 31 * struct vdpa_notification_area - vDPA notification area 32 * @addr: base address of the notification area 33 * @size: size of the notification area 34 */ 35 struct vdpa_notification_area { 36 resource_size_t addr; 37 resource_size_t size; 38 }; 39 40 /** 41 * struct vdpa_vq_state_split - vDPA split virtqueue state 42 * @avail_index: available index 43 */ 44 struct vdpa_vq_state_split { 45 u16 avail_index; 46 }; 47 48 /** 49 * struct vdpa_vq_state_packed - vDPA packed virtqueue state 50 * @last_avail_counter: last driver ring wrap counter observed by device 51 * @last_avail_idx: device available index 52 * @last_used_counter: device ring wrap counter 53 * @last_used_idx: used index 54 */ 55 struct vdpa_vq_state_packed { 56 u16 last_avail_counter:1; 57 u16 last_avail_idx:15; 58 u16 last_used_counter:1; 59 u16 last_used_idx:15; 60 }; 61 62 struct vdpa_vq_state { 63 union { 64 struct vdpa_vq_state_split split; 65 struct vdpa_vq_state_packed packed; 66 }; 67 }; 68 69 struct vdpa_mgmt_dev; 70 71 /** 72 * struct vdpa_device - representation of a vDPA device 73 * @dev: underlying device 74 * @vmap: the metadata passed to upper layer to be used for mapping 75 * @driver_override: driver name to force a match; do not set directly, 76 * because core frees it; use driver_set_override() to 77 * set or clear it. 78 * @config: the configuration ops for this device. 79 * @map: the map ops for this device 80 * @cf_lock: Protects get and set access to configuration layout. 81 * @index: device index 82 * @features_valid: were features initialized? for legacy guests 83 * @ngroups: the number of virtqueue groups 84 * @nas: the number of address spaces 85 * @use_va: indicate whether virtual address must be used by this device 86 * @nvqs: maximum number of supported virtqueues 87 * @mdev: management device pointer; caller must setup when registering device as part 88 * of dev_add() mgmtdev ops callback before invoking _vdpa_register_device(). 89 */ 90 struct vdpa_device { 91 struct device dev; 92 union virtio_map vmap; 93 const char *driver_override; 94 const struct vdpa_config_ops *config; 95 const struct virtio_map_ops *map; 96 struct rw_semaphore cf_lock; /* Protects get/set config */ 97 unsigned int index; 98 bool features_valid; 99 bool use_va; 100 u32 nvqs; 101 struct vdpa_mgmt_dev *mdev; 102 unsigned int ngroups; 103 unsigned int nas; 104 }; 105 106 /** 107 * struct vdpa_iova_range - the IOVA range support by the device 108 * @first: start of the IOVA range 109 * @last: end of the IOVA range 110 */ 111 struct vdpa_iova_range { 112 u64 first; 113 u64 last; 114 }; 115 116 struct vdpa_dev_set_config { 117 u64 device_features; 118 struct { 119 u8 mac[ETH_ALEN]; 120 u16 mtu; 121 u16 max_vq_pairs; 122 } net; 123 u64 mask; 124 }; 125 126 /** 127 * struct vdpa_map_file - file area for device memory mapping 128 * @file: vma->vm_file for the mapping 129 * @offset: mapping offset in the vm_file 130 */ 131 struct vdpa_map_file { 132 struct file *file; 133 u64 offset; 134 }; 135 136 /** 137 * struct vdpa_config_ops - operations for configuring a vDPA device. 138 * Note: vDPA device drivers are required to implement all of the 139 * operations unless it is mentioned to be optional in the following 140 * list. 141 * 142 * @set_vq_address: Set the address of virtqueue 143 * @vdev: vdpa device 144 * @idx: virtqueue index 145 * @desc_area: address of desc area 146 * @driver_area: address of driver area 147 * @device_area: address of device area 148 * Returns integer: success (0) or error (< 0) 149 * @set_vq_num: Set the size of virtqueue 150 * @vdev: vdpa device 151 * @idx: virtqueue index 152 * @num: the size of virtqueue 153 * @kick_vq: Kick the virtqueue 154 * @vdev: vdpa device 155 * @idx: virtqueue index 156 * @kick_vq_with_data: Kick the virtqueue and supply extra data 157 * (only if VIRTIO_F_NOTIFICATION_DATA is negotiated) 158 * @vdev: vdpa device 159 * @data for split virtqueue: 160 * 16 bits vqn and 16 bits next available index. 161 * @data for packed virtqueue: 162 * 16 bits vqn, 15 least significant bits of 163 * next available index and 1 bit next_wrap. 164 * @set_vq_cb: Set the interrupt callback function for 165 * a virtqueue 166 * @vdev: vdpa device 167 * @idx: virtqueue index 168 * @cb: virtio-vdev interrupt callback structure 169 * @set_vq_ready: Set ready status for a virtqueue 170 * @vdev: vdpa device 171 * @idx: virtqueue index 172 * @ready: ready (true) not ready(false) 173 * @get_vq_ready: Get ready status for a virtqueue 174 * @vdev: vdpa device 175 * @idx: virtqueue index 176 * Returns boolean: ready (true) or not (false) 177 * @set_vq_state: Set the state for a virtqueue 178 * @vdev: vdpa device 179 * @idx: virtqueue index 180 * @state: pointer to set virtqueue state (last_avail_idx) 181 * Returns integer: success (0) or error (< 0) 182 * @get_vq_state: Get the state for a virtqueue 183 * @vdev: vdpa device 184 * @idx: virtqueue index 185 * @state: pointer to returned state (last_avail_idx) 186 * @get_vendor_vq_stats: Get the vendor statistics of a device. 187 * @vdev: vdpa device 188 * @idx: virtqueue index 189 * @msg: socket buffer holding stats message 190 * @extack: extack for reporting error messages 191 * Returns integer: success (0) or error (< 0) 192 * @get_vq_notification: Get the notification area for a virtqueue (optional) 193 * @vdev: vdpa device 194 * @idx: virtqueue index 195 * Returns the notification area 196 * @get_vq_irq: Get the irq number of a virtqueue (optional, 197 * but must implemented if require vq irq offloading) 198 * @vdev: vdpa device 199 * @idx: virtqueue index 200 * Returns int: irq number of a virtqueue, 201 * negative number if no irq assigned. 202 * @get_vq_size: Get the size of a specific virtqueue (optional) 203 * @vdev: vdpa device 204 * @idx: virtqueue index 205 * Return u16: the size of the virtqueue 206 * @get_vq_align: Get the virtqueue align requirement 207 * for the device 208 * @vdev: vdpa device 209 * Returns virtqueue algin requirement 210 * @get_vq_group: Get the group id for a specific 211 * virtqueue (optional) 212 * @vdev: vdpa device 213 * @idx: virtqueue index 214 * Returns u32: group id for this virtqueue 215 * @get_vq_desc_group: Get the group id for the descriptor table of 216 * a specific virtqueue (optional) 217 * @vdev: vdpa device 218 * @idx: virtqueue index 219 * Returns u32: group id for the descriptor table 220 * portion of this virtqueue. Could be different 221 * than the one from @get_vq_group, in which case 222 * the access to the descriptor table can be 223 * confined to a separate asid, isolating from 224 * the virtqueue's buffer address access. 225 * @get_device_features: Get virtio features supported by the device 226 * @vdev: vdpa device 227 * Returns the virtio features support by the 228 * device 229 * @get_backend_features: Get parent-specific backend features (optional) 230 * Returns the vdpa features supported by the 231 * device. 232 * @set_driver_features: Set virtio features supported by the driver 233 * @vdev: vdpa device 234 * @features: feature support by the driver 235 * Returns integer: success (0) or error (< 0) 236 * @get_driver_features: Get the virtio driver features in action 237 * @vdev: vdpa device 238 * Returns the virtio features accepted 239 * @set_config_cb: Set the config interrupt callback 240 * @vdev: vdpa device 241 * @cb: virtio-vdev interrupt callback structure 242 * @get_vq_num_max: Get the max size of virtqueue 243 * @vdev: vdpa device 244 * Returns u16: max size of virtqueue 245 * @get_vq_num_min: Get the min size of virtqueue (optional) 246 * @vdev: vdpa device 247 * Returns u16: min size of virtqueue 248 * @get_device_id: Get virtio device id 249 * @vdev: vdpa device 250 * Returns u32: virtio device id 251 * @get_vendor_id: Get id for the vendor that provides this device 252 * @vdev: vdpa device 253 * Returns u32: virtio vendor id 254 * @get_status: Get the device status 255 * @vdev: vdpa device 256 * Returns u8: virtio device status 257 * @set_status: Set the device status 258 * @vdev: vdpa device 259 * @status: virtio device status 260 * @reset: Reset device 261 * @vdev: vdpa device 262 * Returns integer: success (0) or error (< 0) 263 * @compat_reset: Reset device with compatibility quirks to 264 * accommodate older userspace. Only needed by 265 * parent driver which used to have bogus reset 266 * behaviour, and has to maintain such behaviour 267 * for compatibility with older userspace. 268 * Historically compliant driver only has to 269 * implement .reset, Historically non-compliant 270 * driver should implement both. 271 * @vdev: vdpa device 272 * @flags: compatibility quirks for reset 273 * Returns integer: success (0) or error (< 0) 274 * @suspend: Suspend the device (optional) 275 * @vdev: vdpa device 276 * Returns integer: success (0) or error (< 0) 277 * @resume: Resume the device (optional) 278 * @vdev: vdpa device 279 * Returns integer: success (0) or error (< 0) 280 * @get_config_size: Get the size of the configuration space includes 281 * fields that are conditional on feature bits. 282 * @vdev: vdpa device 283 * Returns size_t: configuration size 284 * @get_config: Read from device specific configuration space 285 * @vdev: vdpa device 286 * @offset: offset from the beginning of 287 * configuration space 288 * @buf: buffer used to read to 289 * @len: the length to read from 290 * configuration space 291 * @set_config: Write to device specific configuration space 292 * @vdev: vdpa device 293 * @offset: offset from the beginning of 294 * configuration space 295 * @buf: buffer used to write from 296 * @len: the length to write to 297 * configuration space 298 * @get_generation: Get device config generation (optional) 299 * @vdev: vdpa device 300 * Returns u32: device generation 301 * @get_iova_range: Get supported iova range (optional) 302 * @vdev: vdpa device 303 * Returns the iova range supported by 304 * the device. 305 * @set_vq_affinity: Set the affinity of virtqueue (optional) 306 * @vdev: vdpa device 307 * @idx: virtqueue index 308 * @cpu_mask: the affinity mask 309 * Returns integer: success (0) or error (< 0) 310 * @get_vq_affinity: Get the affinity of virtqueue (optional) 311 * @vdev: vdpa device 312 * @idx: virtqueue index 313 * Returns the affinity mask 314 * @set_group_asid: Set address space identifier for a 315 * virtqueue group (optional) 316 * @vdev: vdpa device 317 * @group: virtqueue group 318 * @asid: address space id for this group 319 * Returns integer: success (0) or error (< 0) 320 * @set_map: Set device memory mapping (optional) 321 * Needed for device that using device 322 * specific DMA translation (on-chip IOMMU) 323 * @vdev: vdpa device 324 * @asid: address space identifier 325 * @iotlb: vhost memory mapping to be 326 * used by the vDPA 327 * Returns integer: success (0) or error (< 0) 328 * @dma_map: Map an area of PA to IOVA (optional) 329 * Needed for device that using device 330 * specific DMA translation (on-chip IOMMU) 331 * and preferring incremental map. 332 * @vdev: vdpa device 333 * @asid: address space identifier 334 * @iova: iova to be mapped 335 * @size: size of the area 336 * @pa: physical address for the map 337 * @perm: device access permission (VHOST_MAP_XX) 338 * Returns integer: success (0) or error (< 0) 339 * @dma_unmap: Unmap an area of IOVA (optional but 340 * must be implemented with dma_map) 341 * Needed for device that using device 342 * specific DMA translation (on-chip IOMMU) 343 * and preferring incremental unmap. 344 * @vdev: vdpa device 345 * @asid: address space identifier 346 * @iova: iova to be unmapped 347 * @size: size of the area 348 * Returns integer: success (0) or error (< 0) 349 * @reset_map: Reset device memory mapping to the default 350 * state (optional) 351 * Needed for devices that are using device 352 * specific DMA translation and prefer mapping 353 * to be decoupled from the virtio life cycle, 354 * i.e. device .reset op does not reset mapping 355 * @vdev: vdpa device 356 * @asid: address space identifier 357 * Returns integer: success (0) or error (< 0) 358 * @get_vq_map: Get the map metadata for a specific 359 * virtqueue (optional) 360 * @vdev: vdpa device 361 * @idx: virtqueue index 362 * Returns map token union error (NULL) 363 * @bind_mm: Bind the device to a specific address space 364 * so the vDPA framework can use VA when this 365 * callback is implemented. (optional) 366 * @vdev: vdpa device 367 * @mm: address space to bind 368 * @unbind_mm: Unbind the device from the address space 369 * bound using the bind_mm callback. (optional) 370 * @vdev: vdpa device 371 * @free: Free resources that belongs to vDPA (optional) 372 * @vdev: vdpa device 373 */ 374 struct vdpa_config_ops { 375 /* Virtqueue ops */ 376 int (*set_vq_address)(struct vdpa_device *vdev, 377 u16 idx, u64 desc_area, u64 driver_area, 378 u64 device_area); 379 void (*set_vq_num)(struct vdpa_device *vdev, u16 idx, u32 num); 380 void (*kick_vq)(struct vdpa_device *vdev, u16 idx); 381 void (*kick_vq_with_data)(struct vdpa_device *vdev, u32 data); 382 void (*set_vq_cb)(struct vdpa_device *vdev, u16 idx, 383 struct vdpa_callback *cb); 384 void (*set_vq_ready)(struct vdpa_device *vdev, u16 idx, bool ready); 385 bool (*get_vq_ready)(struct vdpa_device *vdev, u16 idx); 386 int (*set_vq_state)(struct vdpa_device *vdev, u16 idx, 387 const struct vdpa_vq_state *state); 388 int (*get_vq_state)(struct vdpa_device *vdev, u16 idx, 389 struct vdpa_vq_state *state); 390 int (*get_vendor_vq_stats)(struct vdpa_device *vdev, u16 idx, 391 struct sk_buff *msg, 392 struct netlink_ext_ack *extack); 393 struct vdpa_notification_area 394 (*get_vq_notification)(struct vdpa_device *vdev, u16 idx); 395 /* vq irq is not expected to be changed once DRIVER_OK is set */ 396 int (*get_vq_irq)(struct vdpa_device *vdev, u16 idx); 397 u16 (*get_vq_size)(struct vdpa_device *vdev, u16 idx); 398 399 /* Device ops */ 400 u32 (*get_vq_align)(struct vdpa_device *vdev); 401 u32 (*get_vq_group)(struct vdpa_device *vdev, u16 idx); 402 u32 (*get_vq_desc_group)(struct vdpa_device *vdev, u16 idx); 403 u64 (*get_device_features)(struct vdpa_device *vdev); 404 u64 (*get_backend_features)(const struct vdpa_device *vdev); 405 int (*set_driver_features)(struct vdpa_device *vdev, u64 features); 406 u64 (*get_driver_features)(struct vdpa_device *vdev); 407 void (*set_config_cb)(struct vdpa_device *vdev, 408 struct vdpa_callback *cb); 409 u16 (*get_vq_num_max)(struct vdpa_device *vdev); 410 u16 (*get_vq_num_min)(struct vdpa_device *vdev); 411 u32 (*get_device_id)(struct vdpa_device *vdev); 412 u32 (*get_vendor_id)(struct vdpa_device *vdev); 413 u8 (*get_status)(struct vdpa_device *vdev); 414 void (*set_status)(struct vdpa_device *vdev, u8 status); 415 int (*reset)(struct vdpa_device *vdev); 416 int (*compat_reset)(struct vdpa_device *vdev, u32 flags); 417 #define VDPA_RESET_F_CLEAN_MAP 1 418 int (*suspend)(struct vdpa_device *vdev); 419 int (*resume)(struct vdpa_device *vdev); 420 size_t (*get_config_size)(struct vdpa_device *vdev); 421 void (*get_config)(struct vdpa_device *vdev, unsigned int offset, 422 void *buf, unsigned int len); 423 void (*set_config)(struct vdpa_device *vdev, unsigned int offset, 424 const void *buf, unsigned int len); 425 u32 (*get_generation)(struct vdpa_device *vdev); 426 struct vdpa_iova_range (*get_iova_range)(struct vdpa_device *vdev); 427 int (*set_vq_affinity)(struct vdpa_device *vdev, u16 idx, 428 const struct cpumask *cpu_mask); 429 const struct cpumask *(*get_vq_affinity)(struct vdpa_device *vdev, 430 u16 idx); 431 432 /* DMA ops */ 433 int (*set_map)(struct vdpa_device *vdev, unsigned int asid, 434 struct vhost_iotlb *iotlb); 435 int (*dma_map)(struct vdpa_device *vdev, unsigned int asid, 436 u64 iova, u64 size, u64 pa, u32 perm, void *opaque); 437 int (*dma_unmap)(struct vdpa_device *vdev, unsigned int asid, 438 u64 iova, u64 size); 439 int (*reset_map)(struct vdpa_device *vdev, unsigned int asid); 440 int (*set_group_asid)(struct vdpa_device *vdev, unsigned int group, 441 unsigned int asid); 442 union virtio_map (*get_vq_map)(struct vdpa_device *vdev, u16 idx); 443 int (*bind_mm)(struct vdpa_device *vdev, struct mm_struct *mm); 444 void (*unbind_mm)(struct vdpa_device *vdev); 445 446 /* Free device resources */ 447 void (*free)(struct vdpa_device *vdev); 448 }; 449 450 struct vdpa_device *__vdpa_alloc_device(struct device *parent, 451 const struct vdpa_config_ops *config, 452 const struct virtio_map_ops *map, 453 unsigned int ngroups, unsigned int nas, 454 size_t size, const char *name, 455 bool use_va); 456 457 /** 458 * vdpa_alloc_device - allocate and initilaize a vDPA device 459 * 460 * @dev_struct: the type of the parent structure 461 * @member: the name of struct vdpa_device within the @dev_struct 462 * @parent: the parent device 463 * @config: the bus operations that is supported by this device 464 * @map: the map operations that is supported by this device 465 * @ngroups: the number of virtqueue groups supported by this device 466 * @nas: the number of address spaces 467 * @name: name of the vdpa device 468 * @use_va: indicate whether virtual address must be used by this device 469 * 470 * Return allocated data structure or ERR_PTR upon error 471 */ 472 #define vdpa_alloc_device(dev_struct, member, parent, config, map, \ 473 ngroups, nas, name, use_va) \ 474 container_of((__vdpa_alloc_device( \ 475 parent, config, map, ngroups, nas, \ 476 (sizeof(dev_struct) + \ 477 BUILD_BUG_ON_ZERO(offsetof( \ 478 dev_struct, member))), name, use_va)), \ 479 dev_struct, member) 480 481 int vdpa_register_device(struct vdpa_device *vdev, u32 nvqs); 482 void vdpa_unregister_device(struct vdpa_device *vdev); 483 484 int _vdpa_register_device(struct vdpa_device *vdev, u32 nvqs); 485 void _vdpa_unregister_device(struct vdpa_device *vdev); 486 487 /** 488 * struct vdpa_driver - operations for a vDPA driver 489 * @driver: underlying device driver 490 * @probe: the function to call when a device is found. Returns 0 or -errno. 491 * @remove: the function to call when a device is removed. 492 */ 493 struct vdpa_driver { 494 struct device_driver driver; 495 int (*probe)(struct vdpa_device *vdev); 496 void (*remove)(struct vdpa_device *vdev); 497 }; 498 499 #define vdpa_register_driver(drv) \ 500 __vdpa_register_driver(drv, THIS_MODULE) 501 int __vdpa_register_driver(struct vdpa_driver *drv, struct module *owner); 502 void vdpa_unregister_driver(struct vdpa_driver *drv); 503 504 #define module_vdpa_driver(__vdpa_driver) \ 505 module_driver(__vdpa_driver, vdpa_register_driver, \ 506 vdpa_unregister_driver) 507 508 static inline struct vdpa_driver *drv_to_vdpa(struct device_driver *driver) 509 { 510 return container_of(driver, struct vdpa_driver, driver); 511 } 512 513 static inline struct vdpa_device *dev_to_vdpa(struct device *_dev) 514 { 515 return container_of(_dev, struct vdpa_device, dev); 516 } 517 518 static inline void *vdpa_get_drvdata(const struct vdpa_device *vdev) 519 { 520 return dev_get_drvdata(&vdev->dev); 521 } 522 523 static inline void vdpa_set_drvdata(struct vdpa_device *vdev, void *data) 524 { 525 dev_set_drvdata(&vdev->dev, data); 526 } 527 528 static inline union virtio_map vdpa_get_map(struct vdpa_device *vdev) 529 { 530 return vdev->vmap; 531 } 532 533 static inline int vdpa_reset(struct vdpa_device *vdev, u32 flags) 534 { 535 const struct vdpa_config_ops *ops = vdev->config; 536 int ret; 537 538 down_write(&vdev->cf_lock); 539 vdev->features_valid = false; 540 if (ops->compat_reset && flags) 541 ret = ops->compat_reset(vdev, flags); 542 else 543 ret = ops->reset(vdev); 544 up_write(&vdev->cf_lock); 545 return ret; 546 } 547 548 static inline int vdpa_set_features_unlocked(struct vdpa_device *vdev, u64 features) 549 { 550 const struct vdpa_config_ops *ops = vdev->config; 551 int ret; 552 553 vdev->features_valid = true; 554 ret = ops->set_driver_features(vdev, features); 555 556 return ret; 557 } 558 559 static inline int vdpa_set_features(struct vdpa_device *vdev, u64 features) 560 { 561 int ret; 562 563 down_write(&vdev->cf_lock); 564 ret = vdpa_set_features_unlocked(vdev, features); 565 up_write(&vdev->cf_lock); 566 567 return ret; 568 } 569 570 void vdpa_get_config(struct vdpa_device *vdev, unsigned int offset, 571 void *buf, unsigned int len); 572 void vdpa_set_config(struct vdpa_device *dev, unsigned int offset, 573 const void *buf, unsigned int length); 574 void vdpa_set_status(struct vdpa_device *vdev, u8 status); 575 576 /** 577 * struct vdpa_mgmtdev_ops - vdpa device ops 578 * @dev_add: Add a vdpa device using alloc and register 579 * @mdev: parent device to use for device addition 580 * @name: name of the new vdpa device 581 * @config: config attributes to apply to the device under creation 582 * Driver need to add a new device using _vdpa_register_device() 583 * after fully initializing the vdpa device. Driver must return 0 584 * on success or appropriate error code. 585 * @dev_del: Remove a vdpa device using unregister 586 * @mdev: parent device to use for device removal 587 * @dev: vdpa device to remove 588 * Driver need to remove the specified device by calling 589 * _vdpa_unregister_device(). 590 * @dev_set_attr: change a vdpa device's attr after it was create 591 * @mdev: parent device to use for device 592 * @dev: vdpa device structure 593 * @config:Attributes to be set for the device. 594 * The driver needs to check the mask of the structure and then set 595 * the related information to the vdpa device. The driver must return 0 596 * if set successfully. 597 */ 598 struct vdpa_mgmtdev_ops { 599 int (*dev_add)(struct vdpa_mgmt_dev *mdev, const char *name, 600 const struct vdpa_dev_set_config *config); 601 void (*dev_del)(struct vdpa_mgmt_dev *mdev, struct vdpa_device *dev); 602 int (*dev_set_attr)(struct vdpa_mgmt_dev *mdev, struct vdpa_device *dev, 603 const struct vdpa_dev_set_config *config); 604 }; 605 606 /** 607 * struct vdpa_mgmt_dev - vdpa management device 608 * @device: Management parent device 609 * @ops: operations supported by management device 610 * @id_table: Pointer to device id table of supported ids 611 * @config_attr_mask: bit mask of attributes of type enum vdpa_attr that 612 * management device support during dev_add callback 613 * @list: list entry 614 * @supported_features: features supported by device 615 * @max_supported_vqs: maximum number of virtqueues supported by device 616 */ 617 struct vdpa_mgmt_dev { 618 struct device *device; 619 const struct vdpa_mgmtdev_ops *ops; 620 struct virtio_device_id *id_table; 621 u64 config_attr_mask; 622 struct list_head list; 623 u64 supported_features; 624 u32 max_supported_vqs; 625 }; 626 627 int vdpa_mgmtdev_register(struct vdpa_mgmt_dev *mdev); 628 void vdpa_mgmtdev_unregister(struct vdpa_mgmt_dev *mdev); 629 630 #endif /* _LINUX_VDPA_H */ 631