718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
280 lines
6.2 KiB
C
280 lines
6.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2011, Bryan Venteicher <bryanv@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/sbuf.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/bus.h>
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#include <sys/rman.h>
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#include <dev/virtio/virtio.h>
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#include <dev/virtio/virtio_config.h>
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#include <dev/virtio/virtqueue.h>
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#include "virtio_bus_if.h"
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static int virtio_modevent(module_t, int, void *);
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static const char *virtio_feature_name(uint64_t, struct virtio_feature_desc *);
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static struct virtio_ident {
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uint16_t devid;
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const char *name;
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} virtio_ident_table[] = {
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{ VIRTIO_ID_NETWORK, "Network" },
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{ VIRTIO_ID_BLOCK, "Block" },
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{ VIRTIO_ID_CONSOLE, "Console" },
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{ VIRTIO_ID_ENTROPY, "Entropy" },
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{ VIRTIO_ID_BALLOON, "Balloon" },
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{ VIRTIO_ID_IOMEMORY, "IOMemory" },
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{ VIRTIO_ID_SCSI, "SCSI" },
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{ VIRTIO_ID_9P, "9P Transport" },
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{ 0, NULL }
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};
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/* Device independent features. */
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static struct virtio_feature_desc virtio_common_feature_desc[] = {
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{ VIRTIO_F_NOTIFY_ON_EMPTY, "NotifyOnEmpty" },
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{ VIRTIO_RING_F_INDIRECT_DESC, "RingIndirect" },
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{ VIRTIO_RING_F_EVENT_IDX, "EventIdx" },
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{ VIRTIO_F_BAD_FEATURE, "BadFeature" },
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{ 0, NULL }
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};
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const char *
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virtio_device_name(uint16_t devid)
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{
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struct virtio_ident *ident;
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for (ident = virtio_ident_table; ident->name != NULL; ident++) {
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if (ident->devid == devid)
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return (ident->name);
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}
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return (NULL);
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}
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static const char *
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virtio_feature_name(uint64_t val, struct virtio_feature_desc *desc)
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{
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int i, j;
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struct virtio_feature_desc *descs[2] = { desc,
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virtio_common_feature_desc };
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for (i = 0; i < 2; i++) {
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if (descs[i] == NULL)
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continue;
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for (j = 0; descs[i][j].vfd_val != 0; j++) {
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if (val == descs[i][j].vfd_val)
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return (descs[i][j].vfd_str);
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}
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}
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return (NULL);
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}
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void
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virtio_describe(device_t dev, const char *msg,
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uint64_t features, struct virtio_feature_desc *desc)
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{
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struct sbuf sb;
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uint64_t val;
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char *buf;
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const char *name;
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int n;
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if ((buf = malloc(512, M_TEMP, M_NOWAIT)) == NULL) {
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device_printf(dev, "%s features: %#jx\n", msg, (uintmax_t) features);
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return;
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}
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sbuf_new(&sb, buf, 512, SBUF_FIXEDLEN);
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sbuf_printf(&sb, "%s features: %#jx", msg, (uintmax_t) features);
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for (n = 0, val = 1ULL << 63; val != 0; val >>= 1) {
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/*
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* BAD_FEATURE is used to detect broken Linux clients
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* and therefore is not applicable to FreeBSD.
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*/
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if (((features & val) == 0) || val == VIRTIO_F_BAD_FEATURE)
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continue;
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if (n++ == 0)
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sbuf_cat(&sb, " <");
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else
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sbuf_cat(&sb, ",");
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name = virtio_feature_name(val, desc);
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if (name == NULL)
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sbuf_printf(&sb, "%#jx", (uintmax_t) val);
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else
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sbuf_cat(&sb, name);
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}
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if (n > 0)
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sbuf_cat(&sb, ">");
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#if __FreeBSD_version < 900020
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sbuf_finish(&sb);
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if (sbuf_overflowed(&sb) == 0)
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#else
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if (sbuf_finish(&sb) == 0)
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#endif
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device_printf(dev, "%s\n", sbuf_data(&sb));
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sbuf_delete(&sb);
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free(buf, M_TEMP);
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}
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/*
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* VirtIO bus method wrappers.
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*/
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void
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virtio_read_ivar(device_t dev, int ivar, uintptr_t *val)
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{
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*val = -1;
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BUS_READ_IVAR(device_get_parent(dev), dev, ivar, val);
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}
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void
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virtio_write_ivar(device_t dev, int ivar, uintptr_t val)
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{
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BUS_WRITE_IVAR(device_get_parent(dev), dev, ivar, val);
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}
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uint64_t
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virtio_negotiate_features(device_t dev, uint64_t child_features)
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{
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return (VIRTIO_BUS_NEGOTIATE_FEATURES(device_get_parent(dev),
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child_features));
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}
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int
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virtio_alloc_virtqueues(device_t dev, int flags, int nvqs,
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struct vq_alloc_info *info)
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{
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return (VIRTIO_BUS_ALLOC_VIRTQUEUES(device_get_parent(dev), flags,
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nvqs, info));
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}
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int
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virtio_setup_intr(device_t dev, enum intr_type type)
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{
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return (VIRTIO_BUS_SETUP_INTR(device_get_parent(dev), type));
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}
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int
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virtio_with_feature(device_t dev, uint64_t feature)
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{
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return (VIRTIO_BUS_WITH_FEATURE(device_get_parent(dev), feature));
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}
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void
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virtio_stop(device_t dev)
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{
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VIRTIO_BUS_STOP(device_get_parent(dev));
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}
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int
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virtio_reinit(device_t dev, uint64_t features)
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{
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return (VIRTIO_BUS_REINIT(device_get_parent(dev), features));
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}
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void
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virtio_reinit_complete(device_t dev)
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{
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VIRTIO_BUS_REINIT_COMPLETE(device_get_parent(dev));
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}
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void
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virtio_read_device_config(device_t dev, bus_size_t offset, void *dst, int len)
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{
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VIRTIO_BUS_READ_DEVICE_CONFIG(device_get_parent(dev),
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offset, dst, len);
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}
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void
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virtio_write_device_config(device_t dev, bus_size_t offset, void *dst, int len)
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{
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VIRTIO_BUS_WRITE_DEVICE_CONFIG(device_get_parent(dev),
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offset, dst, len);
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}
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static int
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virtio_modevent(module_t mod, int type, void *unused)
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{
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int error;
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switch (type) {
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case MOD_LOAD:
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case MOD_QUIESCE:
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case MOD_UNLOAD:
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case MOD_SHUTDOWN:
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error = 0;
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break;
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default:
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error = EOPNOTSUPP;
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break;
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}
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return (error);
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}
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static moduledata_t virtio_mod = {
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"virtio",
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virtio_modevent,
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0
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};
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DECLARE_MODULE(virtio, virtio_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
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MODULE_VERSION(virtio, 1);
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