/*- * Copyright (c) 2011, Bryan Venteicher * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice unmodified, this list of conditions, and the following * disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include "virtio_bus_if.h" static int virtio_modevent(module_t, int, void *); static const char *virtio_feature_name(uint64_t, struct virtio_feature_desc *); static struct virtio_ident { uint16_t devid; char *name; } virtio_ident_table[] = { { VIRTIO_ID_NETWORK, "Network" }, { VIRTIO_ID_BLOCK, "Block" }, { VIRTIO_ID_CONSOLE, "Console" }, { VIRTIO_ID_ENTROPY, "Entropy" }, { VIRTIO_ID_BALLOON, "Balloon" }, { VIRTIO_ID_IOMEMORY, "IOMemory" }, { VIRTIO_ID_9P, "9P Transport" }, { 0, NULL } }; /* Device independent features. */ static struct virtio_feature_desc virtio_common_feature_desc[] = { { VIRTIO_F_NOTIFY_ON_EMPTY, "NotifyOnEmpty" }, { VIRTIO_RING_F_INDIRECT_DESC, "RingIndirect" }, { VIRTIO_RING_F_EVENT_IDX, "EventIdx" }, { VIRTIO_F_BAD_FEATURE, "BadFeature" }, { 0, NULL } }; const char * virtio_device_name(uint16_t devid) { struct virtio_ident *ident; for (ident = virtio_ident_table; ident->name != NULL; ident++) { if (ident->devid == devid) return (ident->name); } return (NULL); } void virtio_describe(device_t dev, const char *msg, uint64_t features, struct virtio_feature_desc *feature_desc) { struct sbuf sb; uint64_t val; char *buf; const char *name; int n; if ((buf = malloc(512, M_TEMP, M_NOWAIT)) == NULL) { device_printf(dev, "%s features: 0x%"PRIx64"\n", msg, features); return; } sbuf_new(&sb, buf, 512, SBUF_FIXEDLEN); sbuf_printf(&sb, "%s features: 0x%"PRIx64, msg, features); for (n = 0, val = 1ULL << 63; val != 0; val >>= 1) { /* * BAD_FEATURE is used to detect broken Linux clients * and therefore is not applicable to FreeBSD. */ if (((features & val) == 0) || val == VIRTIO_F_BAD_FEATURE) continue; if (n++ == 0) sbuf_cat(&sb, " <"); else sbuf_cat(&sb, ","); name = NULL; if (feature_desc != NULL) name = virtio_feature_name(val, feature_desc); if (name == NULL) name = virtio_feature_name(val, virtio_common_feature_desc); if (name == NULL) sbuf_printf(&sb, "0x%"PRIx64, val); else sbuf_cat(&sb, name); } if (n > 0) sbuf_cat(&sb, ">"); #if __FreeBSD_version < 900020 sbuf_finish(&sb); if (sbuf_overflowed(&sb) == 0) #else if (sbuf_finish(&sb) == 0) #endif device_printf(dev, "%s\n", sbuf_data(&sb)); sbuf_delete(&sb); free(buf, M_TEMP); } static const char * virtio_feature_name(uint64_t val, struct virtio_feature_desc *feature_desc) { int i; for (i = 0; feature_desc[i].vfd_val != 0; i++) if (val == feature_desc[i].vfd_val) return (feature_desc[i].vfd_str); return (NULL); } /* * VirtIO bus method wrappers. */ void virtio_read_ivar(device_t dev, int ivar, uintptr_t *val) { *val = -1; BUS_READ_IVAR(device_get_parent(dev), dev, ivar, val); } void virtio_write_ivar(device_t dev, int ivar, uintptr_t val) { BUS_WRITE_IVAR(device_get_parent(dev), dev, ivar, val); } uint64_t virtio_negotiate_features(device_t dev, uint64_t child_features) { return (VIRTIO_BUS_NEGOTIATE_FEATURES(device_get_parent(dev), child_features)); } int virtio_alloc_virtqueues(device_t dev, int flags, int nvqs, struct vq_alloc_info *info) { return (VIRTIO_BUS_ALLOC_VIRTQUEUES(device_get_parent(dev), flags, nvqs, info)); } int virtio_setup_intr(device_t dev, enum intr_type type) { return (VIRTIO_BUS_SETUP_INTR(device_get_parent(dev), type)); } int virtio_with_feature(device_t dev, uint64_t feature) { return (VIRTIO_BUS_WITH_FEATURE(device_get_parent(dev), feature)); } void virtio_stop(device_t dev) { VIRTIO_BUS_STOP(device_get_parent(dev)); } int virtio_reinit(device_t dev, uint64_t features) { return (VIRTIO_BUS_REINIT(device_get_parent(dev), features)); } void virtio_reinit_complete(device_t dev) { VIRTIO_BUS_REINIT_COMPLETE(device_get_parent(dev)); } void virtio_read_device_config(device_t dev, bus_size_t offset, void *dst, int len) { VIRTIO_BUS_READ_DEVICE_CONFIG(device_get_parent(dev), offset, dst, len); } void virtio_write_device_config(device_t dev, bus_size_t offset, void *dst, int len) { VIRTIO_BUS_WRITE_DEVICE_CONFIG(device_get_parent(dev), offset, dst, len); } static int virtio_modevent(module_t mod, int type, void *unused) { int error; error = 0; switch (type) { case MOD_LOAD: case MOD_QUIESCE: case MOD_UNLOAD: case MOD_SHUTDOWN: break; default: error = EOPNOTSUPP; break; } return (error); } static moduledata_t virtio_mod = { "virtio", virtio_modevent, 0 }; DECLARE_MODULE(virtio, virtio_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); MODULE_VERSION(virtio, 1);