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Lines 32-37
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| 32 |
__FBSDID("$FreeBSD$"); |
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__FBSDID("$FreeBSD$"); |
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| 34 |
#include <sys/param.h> |
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#include <sys/param.h> |
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#include <sys/types.h> |
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#include <sys/eventhandler.h> |
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#include <sys/kernel.h> |
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#include <sys/kernel.h> |
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#include <sys/malloc.h> |
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#include <sys/malloc.h> |
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#include <sys/module.h> |
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#include <sys/module.h> |
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Lines 52-57
struct vtrnd_softc {
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device_t vtrnd_dev; |
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device_t vtrnd_dev; |
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uint64_t vtrnd_features; |
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uint64_t vtrnd_features; |
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struct virtqueue *vtrnd_vq; |
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struct virtqueue *vtrnd_vq; |
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eventhandler_tag eh; |
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bool inactive; |
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}; |
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}; |
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static int vtrnd_modevent(module_t, int, void *); |
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static int vtrnd_modevent(module_t, int, void *); |
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Lines 59-64
static int vtrnd_modevent(module_t, int, void *);
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static int vtrnd_probe(device_t); |
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static int vtrnd_probe(device_t); |
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static int vtrnd_attach(device_t); |
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static int vtrnd_attach(device_t); |
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static int vtrnd_detach(device_t); |
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static int vtrnd_detach(device_t); |
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static int vtrnd_shutdown(device_t); |
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static int vtrnd_negotiate_features(struct vtrnd_softc *); |
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static int vtrnd_negotiate_features(struct vtrnd_softc *); |
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static int vtrnd_setup_features(struct vtrnd_softc *); |
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static int vtrnd_setup_features(struct vtrnd_softc *); |
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Lines 86-91
static device_method_t vtrnd_methods[] = {
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DEVMETHOD(device_probe, vtrnd_probe), |
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DEVMETHOD(device_probe, vtrnd_probe), |
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DEVMETHOD(device_attach, vtrnd_attach), |
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DEVMETHOD(device_attach, vtrnd_attach), |
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DEVMETHOD(device_detach, vtrnd_detach), |
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DEVMETHOD(device_detach, vtrnd_detach), |
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DEVMETHOD(device_shutdown, vtrnd_shutdown), |
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DEVMETHOD_END |
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DEVMETHOD_END |
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}; |
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}; |
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Lines 160-165
vtrnd_attach(device_t dev)
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error = EEXIST; |
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error = EEXIST; |
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goto fail; |
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goto fail; |
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} |
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} |
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sc->eh = EVENTHANDLER_REGISTER(shutdown_post_sync, |
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vtrnd_shutdown, dev, SHUTDOWN_PRI_LAST + 1); /* ??? */ |
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if (sc->eh == NULL) { |
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device_printf(dev, "Shutdown event registration failed\n"); |
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error = ENXIO; |
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goto fail; |
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} |
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sc->inactive = false; |
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random_source_register(&random_vtrnd); |
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random_source_register(&random_vtrnd); |
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180 |
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fail: |
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fail: |
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Lines 179-190
vtrnd_detach(device_t dev)
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atomic_load_explicit(&g_vtrnd_softc, memory_order_acquire) == sc, |
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atomic_load_explicit(&g_vtrnd_softc, memory_order_acquire) == sc, |
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("only one global instance at a time")); |
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("only one global instance at a time")); |
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sc->inactive = true; |
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if (sc->eh != NULL) { |
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EVENTHANDLER_DEREGISTER(shutdown_post_sync, sc->eh); |
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sc->eh = NULL; |
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} |
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random_source_deregister(&random_vtrnd); |
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random_source_deregister(&random_vtrnd); |
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atomic_store_explicit(&g_vtrnd_softc, NULL, memory_order_release); |
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atomic_store_explicit(&g_vtrnd_softc, NULL, memory_order_release); |
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return (0); |
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return (0); |
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} |
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} |
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static int |
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static int |
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vtrnd_shutdown(device_t dev) |
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{ |
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struct vtrnd_softc *sc; |
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sc = device_get_softc(dev); |
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sc->inactive = true; |
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return(0); |
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} |
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static int |
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vtrnd_negotiate_features(struct vtrnd_softc *sc) |
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vtrnd_negotiate_features(struct vtrnd_softc *sc) |
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{ |
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{ |
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device_t dev; |
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device_t dev; |
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Lines 234-239
vtrnd_harvest(struct vtrnd_softc *sc, void *buf, size_
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int error; |
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int error; |
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_Static_assert(sizeof(value) < PAGE_SIZE, "sglist assumption"); |
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_Static_assert(sizeof(value) < PAGE_SIZE, "sglist assumption"); |
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| 270 |
if (sc->inactive) |
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return (EDEADLK); |
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| 238 |
sglist_init(&sg, 1, segs); |
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sglist_init(&sg, 1, segs); |
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error = sglist_append(&sg, value, *sz); |
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error = sglist_append(&sg, value, *sz); |