| virtio_balloon.c (228301) | virtio_balloon.c (234270) |
|---|---|
| 1/*- 2 * Copyright (c) 2011, Bryan Venteicher <bryanv@daemoninthecloset.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 13 unchanged lines hidden (view full) --- 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27/* Driver for VirtIO memory balloon devices. */ 28 29#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 2011, Bryan Venteicher <bryanv@daemoninthecloset.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 13 unchanged lines hidden (view full) --- 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27/* Driver for VirtIO memory balloon devices. */ 28 29#include <sys/cdefs.h> |
| 30__FBSDID("$FreeBSD: head/sys/dev/virtio/balloon/virtio_balloon.c 228301 2011-12-06 06:28:32Z grehan $"); | 30__FBSDID("$FreeBSD: head/sys/dev/virtio/balloon/virtio_balloon.c 234270 2012-04-14 05:48:04Z grehan $"); |
| 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/kernel.h> 35#include <sys/endian.h> 36#include <sys/kthread.h> 37#include <sys/malloc.h> 38#include <sys/module.h> --- 78 unchanged lines hidden (view full) --- 117 118/* 119 * Maximum number of pages we'll request to inflate or deflate 120 * the balloon in one virtqueue request. Both Linux and NetBSD 121 * have settled on 256, doing up to 1MB at a time. 122 */ 123#define VTBALLOON_PAGES_PER_REQUEST 256 124 | 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/kernel.h> 35#include <sys/endian.h> 36#include <sys/kthread.h> 37#include <sys/malloc.h> 38#include <sys/module.h> --- 78 unchanged lines hidden (view full) --- 117 118/* 119 * Maximum number of pages we'll request to inflate or deflate 120 * the balloon in one virtqueue request. Both Linux and NetBSD 121 * have settled on 256, doing up to 1MB at a time. 122 */ 123#define VTBALLOON_PAGES_PER_REQUEST 256 124 |
| 125/* Must be able to fix all pages frames in one page (segment). */ 126CTASSERT(VTBALLOON_PAGES_PER_REQUEST * sizeof(uint32_t) <= PAGE_SIZE); 127 |
|
| 125#define VTBALLOON_MTX(_sc) &(_sc)->vtballoon_mtx 126#define VTBALLOON_LOCK_INIT(_sc, _name) mtx_init(VTBALLOON_MTX((_sc)), _name, \ 127 "VirtIO Balloon Lock", MTX_SPIN) 128#define VTBALLOON_LOCK(_sc) mtx_lock_spin(VTBALLOON_MTX((_sc))) 129#define VTBALLOON_UNLOCK(_sc) mtx_unlock_spin(VTBALLOON_MTX((_sc))) 130#define VTBALLOON_LOCK_DESTROY(_sc) mtx_destroy(VTBALLOON_MTX((_sc))) 131 132static device_method_t vtballoon_methods[] = { 133 /* Device methods. */ 134 DEVMETHOD(device_probe, vtballoon_probe), 135 DEVMETHOD(device_attach, vtballoon_attach), 136 DEVMETHOD(device_detach, vtballoon_detach), 137 138 /* VirtIO methods. */ 139 DEVMETHOD(virtio_config_change, vtballoon_config_change), 140 | 128#define VTBALLOON_MTX(_sc) &(_sc)->vtballoon_mtx 129#define VTBALLOON_LOCK_INIT(_sc, _name) mtx_init(VTBALLOON_MTX((_sc)), _name, \ 130 "VirtIO Balloon Lock", MTX_SPIN) 131#define VTBALLOON_LOCK(_sc) mtx_lock_spin(VTBALLOON_MTX((_sc))) 132#define VTBALLOON_UNLOCK(_sc) mtx_unlock_spin(VTBALLOON_MTX((_sc))) 133#define VTBALLOON_LOCK_DESTROY(_sc) mtx_destroy(VTBALLOON_MTX((_sc))) 134 135static device_method_t vtballoon_methods[] = { 136 /* Device methods. */ 137 DEVMETHOD(device_probe, vtballoon_probe), 138 DEVMETHOD(device_attach, vtballoon_attach), 139 DEVMETHOD(device_detach, vtballoon_detach), 140 141 /* VirtIO methods. */ 142 DEVMETHOD(virtio_config_change, vtballoon_config_change), 143 |
| 141 { 0, 0 } | 144 DEVMETHOD_END |
| 142}; 143 144static driver_t vtballoon_driver = { 145 "vtballoon", 146 vtballoon_methods, 147 sizeof(struct vtballoon_softc) 148}; 149static devclass_t vtballoon_devclass; --- 247 unchanged lines hidden (view full) --- 397 sglist_init(&sg, 1, segs); 398 399 error = sglist_append(&sg, sc->vtballoon_page_frames, 400 npages * sizeof(uint32_t)); 401 KASSERT(error == 0, ("error adding page frames to sglist")); 402 403 error = virtqueue_enqueue(vq, vq, &sg, 1, 0); 404 KASSERT(error == 0, ("error enqueuing page frames to virtqueue")); | 145}; 146 147static driver_t vtballoon_driver = { 148 "vtballoon", 149 vtballoon_methods, 150 sizeof(struct vtballoon_softc) 151}; 152static devclass_t vtballoon_devclass; --- 247 unchanged lines hidden (view full) --- 400 sglist_init(&sg, 1, segs); 401 402 error = sglist_append(&sg, sc->vtballoon_page_frames, 403 npages * sizeof(uint32_t)); 404 KASSERT(error == 0, ("error adding page frames to sglist")); 405 406 error = virtqueue_enqueue(vq, vq, &sg, 1, 0); 407 KASSERT(error == 0, ("error enqueuing page frames to virtqueue")); |
| 408 virtqueue_notify(vq); |
|
| 405 406 /* 407 * Inflate and deflate operations are done synchronously. The 408 * interrupt handler will wake us up. 409 */ 410 VTBALLOON_LOCK(sc); | 409 410 /* 411 * Inflate and deflate operations are done synchronously. The 412 * interrupt handler will wake us up. 413 */ 414 VTBALLOON_LOCK(sc); |
| 411 virtqueue_notify(vq); | |
| 412 413 while ((c = virtqueue_dequeue(vq, NULL)) == NULL) 414 msleep_spin(sc, VTBALLOON_MTX(sc), "vtbspf", 0); 415 VTBALLOON_UNLOCK(sc); 416 417 KASSERT(c == vq, ("unexpected balloon operation response")); 418} 419 --- 149 unchanged lines hidden --- | 415 416 while ((c = virtqueue_dequeue(vq, NULL)) == NULL) 417 msleep_spin(sc, VTBALLOON_MTX(sc), "vtbspf", 0); 418 VTBALLOON_UNLOCK(sc); 419 420 KASSERT(c == vq, ("unexpected balloon operation response")); 421} 422 --- 149 unchanged lines hidden --- |