Lines Matching refs:vb
103 struct virtio_balloon *vb = vq->vdev->priv; in balloon_ack() local
105 wake_up(&vb->acked); in balloon_ack()
108 static void tell_host(struct virtio_balloon *vb, struct virtqueue *vq) in tell_host() argument
113 sg_init_one(&sg, vb->pfns, sizeof(vb->pfns[0]) * vb->num_pfns); in tell_host()
116 virtqueue_add_outbuf(vq, &sg, 1, vb, GFP_KERNEL); in tell_host()
120 wait_event(vb->acked, virtqueue_get_buf(vq, &len)); in tell_host()
124 static void set_page_pfns(struct virtio_balloon *vb, in set_page_pfns() argument
134 pfns[i] = cpu_to_virtio32(vb->vdev, in set_page_pfns()
138 static unsigned fill_balloon(struct virtio_balloon *vb, size_t num) in fill_balloon() argument
146 num = min(num, ARRAY_SIZE(vb->pfns)); in fill_balloon()
153 dev_info_ratelimited(&vb->vdev->dev, in fill_balloon()
164 mutex_lock(&vb->balloon_lock); in fill_balloon()
166 vb->num_pfns = 0; in fill_balloon()
169 balloon_page_enqueue(&vb->vb_dev_info, page); in fill_balloon()
171 set_page_pfns(vb, vb->pfns + vb->num_pfns, page); in fill_balloon()
172 vb->num_pages += VIRTIO_BALLOON_PAGES_PER_PAGE; in fill_balloon()
173 if (!virtio_has_feature(vb->vdev, in fill_balloon()
176 vb->num_pfns += VIRTIO_BALLOON_PAGES_PER_PAGE; in fill_balloon()
179 num_allocated_pages = vb->num_pfns; in fill_balloon()
181 if (vb->num_pfns != 0) in fill_balloon()
182 tell_host(vb, vb->inflate_vq); in fill_balloon()
183 mutex_unlock(&vb->balloon_lock); in fill_balloon()
188 static void release_pages_balloon(struct virtio_balloon *vb, in release_pages_balloon() argument
194 if (!virtio_has_feature(vb->vdev, in release_pages_balloon()
202 static unsigned leak_balloon(struct virtio_balloon *vb, size_t num) in leak_balloon() argument
206 struct balloon_dev_info *vb_dev_info = &vb->vb_dev_info; in leak_balloon()
210 num = min(num, ARRAY_SIZE(vb->pfns)); in leak_balloon()
212 mutex_lock(&vb->balloon_lock); in leak_balloon()
214 num = min(num, (size_t)vb->num_pages); in leak_balloon()
215 for (vb->num_pfns = 0; vb->num_pfns < num; in leak_balloon()
216 vb->num_pfns += VIRTIO_BALLOON_PAGES_PER_PAGE) { in leak_balloon()
220 set_page_pfns(vb, vb->pfns + vb->num_pfns, page); in leak_balloon()
222 vb->num_pages -= VIRTIO_BALLOON_PAGES_PER_PAGE; in leak_balloon()
225 num_freed_pages = vb->num_pfns; in leak_balloon()
231 if (vb->num_pfns != 0) in leak_balloon()
232 tell_host(vb, vb->deflate_vq); in leak_balloon()
233 release_pages_balloon(vb, &pages); in leak_balloon()
234 mutex_unlock(&vb->balloon_lock); in leak_balloon()
238 static inline void update_stat(struct virtio_balloon *vb, int idx, in update_stat() argument
242 vb->stats[idx].tag = cpu_to_virtio16(vb->vdev, tag); in update_stat()
243 vb->stats[idx].val = cpu_to_virtio64(vb->vdev, val); in update_stat()
248 static unsigned int update_balloon_stats(struct virtio_balloon *vb) in update_balloon_stats() argument
263 update_stat(vb, idx++, VIRTIO_BALLOON_S_SWAP_IN, in update_balloon_stats()
265 update_stat(vb, idx++, VIRTIO_BALLOON_S_SWAP_OUT, in update_balloon_stats()
267 update_stat(vb, idx++, VIRTIO_BALLOON_S_MAJFLT, events[PGMAJFAULT]); in update_balloon_stats()
268 update_stat(vb, idx++, VIRTIO_BALLOON_S_MINFLT, events[PGFAULT]); in update_balloon_stats()
270 update_stat(vb, idx++, VIRTIO_BALLOON_S_HTLB_PGALLOC, in update_balloon_stats()
272 update_stat(vb, idx++, VIRTIO_BALLOON_S_HTLB_PGFAIL, in update_balloon_stats()
276 update_stat(vb, idx++, VIRTIO_BALLOON_S_MEMFREE, in update_balloon_stats()
278 update_stat(vb, idx++, VIRTIO_BALLOON_S_MEMTOT, in update_balloon_stats()
280 update_stat(vb, idx++, VIRTIO_BALLOON_S_AVAIL, in update_balloon_stats()
282 update_stat(vb, idx++, VIRTIO_BALLOON_S_CACHES, in update_balloon_stats()
299 struct virtio_balloon *vb = vq->vdev->priv; in stats_request() local
301 spin_lock(&vb->stop_update_lock); in stats_request()
302 if (!vb->stop_update) in stats_request()
303 queue_work(system_freezable_wq, &vb->update_balloon_stats_work); in stats_request()
304 spin_unlock(&vb->stop_update_lock); in stats_request()
307 static void stats_handle_request(struct virtio_balloon *vb) in stats_handle_request() argument
313 num_stats = update_balloon_stats(vb); in stats_handle_request()
315 vq = vb->stats_vq; in stats_handle_request()
318 sg_init_one(&sg, vb->stats, sizeof(vb->stats[0]) * num_stats); in stats_handle_request()
319 virtqueue_add_outbuf(vq, &sg, 1, vb, GFP_KERNEL); in stats_handle_request()
325 struct virtio_balloon *vb = vdev->priv; in virtballoon_changed() local
328 spin_lock_irqsave(&vb->stop_update_lock, flags); in virtballoon_changed()
329 if (!vb->stop_update) in virtballoon_changed()
330 queue_work(system_freezable_wq, &vb->update_balloon_size_work); in virtballoon_changed()
331 spin_unlock_irqrestore(&vb->stop_update_lock, flags); in virtballoon_changed()
334 static inline s64 towards_target(struct virtio_balloon *vb) in towards_target() argument
339 virtio_cread(vb->vdev, struct virtio_balloon_config, num_pages, in towards_target()
343 if (!virtio_has_feature(vb->vdev, VIRTIO_F_VERSION_1)) in towards_target()
347 return target - vb->num_pages; in towards_target()
350 static void update_balloon_size(struct virtio_balloon *vb) in update_balloon_size() argument
352 u32 actual = vb->num_pages; in update_balloon_size()
355 if (!virtio_has_feature(vb->vdev, VIRTIO_F_VERSION_1)) in update_balloon_size()
358 virtio_cwrite(vb->vdev, struct virtio_balloon_config, actual, in update_balloon_size()
364 struct virtio_balloon *vb; in update_balloon_stats_func() local
366 vb = container_of(work, struct virtio_balloon, in update_balloon_stats_func()
368 stats_handle_request(vb); in update_balloon_stats_func()
373 struct virtio_balloon *vb; in update_balloon_size_func() local
376 vb = container_of(work, struct virtio_balloon, in update_balloon_size_func()
378 diff = towards_target(vb); in update_balloon_size_func()
381 diff -= fill_balloon(vb, diff); in update_balloon_size_func()
383 diff += leak_balloon(vb, -diff); in update_balloon_size_func()
384 update_balloon_size(vb); in update_balloon_size_func()
390 static int init_vqs(struct virtio_balloon *vb) in init_vqs() argument
401 nvqs = virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_STATS_VQ) ? 3 : 2; in init_vqs()
402 err = virtio_find_vqs(vb->vdev, nvqs, vqs, callbacks, names, NULL); in init_vqs()
406 vb->inflate_vq = vqs[0]; in init_vqs()
407 vb->deflate_vq = vqs[1]; in init_vqs()
408 if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_STATS_VQ)) { in init_vqs()
411 vb->stats_vq = vqs[2]; in init_vqs()
417 num_stats = update_balloon_stats(vb); in init_vqs()
419 sg_init_one(&sg, vb->stats, sizeof(vb->stats[0]) * num_stats); in init_vqs()
420 err = virtqueue_add_outbuf(vb->stats_vq, &sg, 1, vb, in init_vqs()
423 dev_warn(&vb->vdev->dev, "%s: add stat_vq failed\n", in init_vqs()
427 virtqueue_kick(vb->stats_vq); in init_vqs()
454 struct virtio_balloon *vb = container_of(vb_dev_info, in virtballoon_migratepage() local
466 if (!mutex_trylock(&vb->balloon_lock)) in virtballoon_migratepage()
477 vb->num_pfns = VIRTIO_BALLOON_PAGES_PER_PAGE; in virtballoon_migratepage()
478 set_page_pfns(vb, vb->pfns, newpage); in virtballoon_migratepage()
479 tell_host(vb, vb->inflate_vq); in virtballoon_migratepage()
485 vb->num_pfns = VIRTIO_BALLOON_PAGES_PER_PAGE; in virtballoon_migratepage()
486 set_page_pfns(vb, vb->pfns, page); in virtballoon_migratepage()
487 tell_host(vb, vb->deflate_vq); in virtballoon_migratepage()
489 mutex_unlock(&vb->balloon_lock); in virtballoon_migratepage()
519 struct virtio_balloon *vb = container_of(shrinker, in virtio_balloon_shrinker_scan() local
529 while (vb->num_pages && pages_to_free) { in virtio_balloon_shrinker_scan()
531 pages_freed += leak_balloon(vb, pages_to_free); in virtio_balloon_shrinker_scan()
533 update_balloon_size(vb); in virtio_balloon_shrinker_scan()
541 struct virtio_balloon *vb = container_of(shrinker, in virtio_balloon_shrinker_count() local
544 return vb->num_pages / VIRTIO_BALLOON_PAGES_PER_PAGE; in virtio_balloon_shrinker_count()
547 static void virtio_balloon_unregister_shrinker(struct virtio_balloon *vb) in virtio_balloon_unregister_shrinker() argument
549 unregister_shrinker(&vb->shrinker); in virtio_balloon_unregister_shrinker()
552 static int virtio_balloon_register_shrinker(struct virtio_balloon *vb) in virtio_balloon_register_shrinker() argument
554 vb->shrinker.scan_objects = virtio_balloon_shrinker_scan; in virtio_balloon_register_shrinker()
555 vb->shrinker.count_objects = virtio_balloon_shrinker_count; in virtio_balloon_register_shrinker()
556 vb->shrinker.seeks = DEFAULT_SEEKS; in virtio_balloon_register_shrinker()
558 return register_shrinker(&vb->shrinker); in virtio_balloon_register_shrinker()
563 struct virtio_balloon *vb; in virtballoon_probe() local
572 vdev->priv = vb = kzalloc(sizeof(*vb), GFP_KERNEL); in virtballoon_probe()
573 if (!vb) { in virtballoon_probe()
578 INIT_WORK(&vb->update_balloon_stats_work, update_balloon_stats_func); in virtballoon_probe()
579 INIT_WORK(&vb->update_balloon_size_work, update_balloon_size_func); in virtballoon_probe()
580 spin_lock_init(&vb->stop_update_lock); in virtballoon_probe()
581 mutex_init(&vb->balloon_lock); in virtballoon_probe()
582 init_waitqueue_head(&vb->acked); in virtballoon_probe()
583 vb->vdev = vdev; in virtballoon_probe()
585 balloon_devinfo_init(&vb->vb_dev_info); in virtballoon_probe()
587 err = init_vqs(vb); in virtballoon_probe()
598 vb->vb_dev_info.migratepage = virtballoon_migratepage; in virtballoon_probe()
599 vb->vb_dev_info.inode = alloc_anon_inode(balloon_mnt->mnt_sb); in virtballoon_probe()
600 if (IS_ERR(vb->vb_dev_info.inode)) { in virtballoon_probe()
601 err = PTR_ERR(vb->vb_dev_info.inode); in virtballoon_probe()
605 vb->vb_dev_info.inode->i_mapping->a_ops = &balloon_aops; in virtballoon_probe()
611 if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_DEFLATE_ON_OOM)) { in virtballoon_probe()
612 err = virtio_balloon_register_shrinker(vb); in virtballoon_probe()
618 if (towards_target(vb)) in virtballoon_probe()
625 kfree(vb); in virtballoon_probe()
630 static void remove_common(struct virtio_balloon *vb) in remove_common() argument
633 while (vb->num_pages) in remove_common()
634 leak_balloon(vb, vb->num_pages); in remove_common()
635 update_balloon_size(vb); in remove_common()
638 vb->vdev->config->reset(vb->vdev); in remove_common()
640 vb->vdev->config->del_vqs(vb->vdev); in remove_common()
645 struct virtio_balloon *vb = vdev->priv; in virtballoon_remove() local
647 if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_DEFLATE_ON_OOM)) in virtballoon_remove()
648 virtio_balloon_unregister_shrinker(vb); in virtballoon_remove()
649 spin_lock_irq(&vb->stop_update_lock); in virtballoon_remove()
650 vb->stop_update = true; in virtballoon_remove()
651 spin_unlock_irq(&vb->stop_update_lock); in virtballoon_remove()
652 cancel_work_sync(&vb->update_balloon_size_work); in virtballoon_remove()
653 cancel_work_sync(&vb->update_balloon_stats_work); in virtballoon_remove()
655 remove_common(vb); in virtballoon_remove()
657 if (vb->vb_dev_info.inode) in virtballoon_remove()
658 iput(vb->vb_dev_info.inode); in virtballoon_remove()
662 kfree(vb); in virtballoon_remove()
668 struct virtio_balloon *vb = vdev->priv; in virtballoon_freeze() local
674 remove_common(vb); in virtballoon_freeze()
680 struct virtio_balloon *vb = vdev->priv; in virtballoon_restore() local
689 if (towards_target(vb)) in virtballoon_restore()
691 update_balloon_size(vb); in virtballoon_restore()