272 lines
7.2 KiB
C
272 lines
7.2 KiB
C
/* $NetBSD: vmbusic.c,v 1.2 2019/10/01 18:00:08 chs Exp $ */
|
|
/*-
|
|
* Copyright (c) 2014,2016 Microsoft Corp.
|
|
* 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 <sys/cdefs.h>
|
|
#ifdef __KERNEL_RCSID
|
|
__KERNEL_RCSID(0, "$NetBSD: vmbusic.c,v 1.2 2019/10/01 18:00:08 chs Exp $");
|
|
#endif
|
|
#ifdef __FBSDID
|
|
__FBSDID("$FreeBSD: head/sys/dev/hyperv/utilities/vmbus_ic.c 310317 2016-12-20 07:14:24Z sephe $");
|
|
#endif
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/device.h>
|
|
#include <sys/kmem.h>
|
|
#include <sys/reboot.h>
|
|
|
|
#include <dev/hyperv/vmbusvar.h>
|
|
#include <dev/hyperv/vmbusicreg.h>
|
|
#include <dev/hyperv/vmbusicvar.h>
|
|
|
|
#define VMBUS_IC_BRSIZE (4 * PAGE_SIZE)
|
|
|
|
#define VMBUS_IC_VERCNT 2
|
|
#define VMBUS_IC_NEGOSZ \
|
|
offsetof(struct vmbus_icmsg_negotiate, ic_ver[VMBUS_IC_VERCNT])
|
|
__CTASSERT(VMBUS_IC_NEGOSZ < VMBUS_IC_BRSIZE);
|
|
|
|
|
|
int
|
|
vmbusic_probe(struct vmbus_attach_args *aa, const struct hyperv_guid *guid)
|
|
{
|
|
|
|
if (memcmp(aa->aa_type, guid, sizeof(*aa->aa_type)) != 0)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
vmbusic_attach(device_t dv, struct vmbus_attach_args *aa,
|
|
vmbus_channel_callback_t cb)
|
|
{
|
|
struct vmbusic_softc *sc = device_private(dv);
|
|
|
|
sc->sc_dev = dv;
|
|
sc->sc_chan = aa->aa_chan;
|
|
|
|
sc->sc_buflen = VMBUS_IC_BRSIZE;
|
|
sc->sc_buf = kmem_alloc(sc->sc_buflen, KM_SLEEP);
|
|
|
|
/*
|
|
* These services are not performance critical and do not need
|
|
* batched reading. Furthermore, some services such as KVP can
|
|
* only handle one message from the host at a time.
|
|
* Turn off batched reading for all util drivers before we open the
|
|
* channel.
|
|
*/
|
|
sc->sc_chan->ch_flags &= ~CHF_BATCHED;
|
|
|
|
if (vmbus_channel_open(sc->sc_chan, sc->sc_buflen, NULL, 0, cb, sc)) {
|
|
aprint_error_dev(dv, "failed to open channel\n");
|
|
kmem_free(sc->sc_buf, sc->sc_buflen);
|
|
sc->sc_buf = NULL;
|
|
return ENXIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
vmbusic_detach(device_t dv, int flags)
|
|
{
|
|
struct vmbusic_softc *sc = device_private(dv);
|
|
int error;
|
|
|
|
error = vmbus_channel_close(sc->sc_chan);
|
|
if (error != 0)
|
|
return error;
|
|
|
|
if (sc->sc_buf != NULL) {
|
|
kmem_free(sc->sc_buf, sc->sc_buflen);
|
|
sc->sc_buf = NULL;
|
|
}
|
|
|
|
if (sc->sc_log != NULL) {
|
|
sysctl_teardown(&sc->sc_log);
|
|
sc->sc_log = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
vmbusic_negotiate(struct vmbusic_softc *sc, void *data, uint32_t *dlen0,
|
|
uint32_t fw_ver, uint32_t msg_ver)
|
|
{
|
|
struct vmbus_icmsg_negotiate *nego;
|
|
uint32_t sel_fw_ver = 0, sel_msg_ver = 0;
|
|
int i, cnt, dlen = *dlen0, error;
|
|
bool has_fw_ver, has_msg_ver = false;
|
|
|
|
/*
|
|
* Preliminary message verification.
|
|
*/
|
|
if (dlen < sizeof(*nego)) {
|
|
device_printf(sc->sc_dev, "truncated ic negotiate, len %d\n",
|
|
dlen);
|
|
return EINVAL;
|
|
}
|
|
nego = data;
|
|
|
|
if (nego->ic_fwver_cnt == 0) {
|
|
device_printf(sc->sc_dev, "ic negotiate does not contain "
|
|
"framework version %u\n", nego->ic_fwver_cnt);
|
|
return EINVAL;
|
|
}
|
|
if (nego->ic_msgver_cnt == 0) {
|
|
device_printf(sc->sc_dev, "ic negotiate does not contain "
|
|
"message version %u\n", nego->ic_msgver_cnt);
|
|
return EINVAL;
|
|
}
|
|
|
|
cnt = nego->ic_fwver_cnt + nego->ic_msgver_cnt;
|
|
if (dlen < offsetof(struct vmbus_icmsg_negotiate, ic_ver[cnt])) {
|
|
device_printf(sc->sc_dev, "ic negotiate does not contain "
|
|
"versions %d\n", dlen);
|
|
return EINVAL;
|
|
}
|
|
|
|
error = EOPNOTSUPP;
|
|
|
|
/*
|
|
* Find the best match framework version.
|
|
*/
|
|
has_fw_ver = false;
|
|
for (i = 0; i < nego->ic_fwver_cnt; ++i) {
|
|
if (VMBUS_ICVER_LE(nego->ic_ver[i], fw_ver)) {
|
|
if (!has_fw_ver) {
|
|
sel_fw_ver = nego->ic_ver[i];
|
|
has_fw_ver = true;
|
|
} else if (VMBUS_ICVER_GT(nego->ic_ver[i],
|
|
sel_fw_ver)) {
|
|
sel_fw_ver = nego->ic_ver[i];
|
|
}
|
|
}
|
|
}
|
|
if (!has_fw_ver) {
|
|
device_printf(sc->sc_dev, "failed to select framework "
|
|
"version\n");
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* Fine the best match message version.
|
|
*/
|
|
has_msg_ver = false;
|
|
for (i = nego->ic_fwver_cnt;
|
|
i < nego->ic_fwver_cnt + nego->ic_msgver_cnt; ++i) {
|
|
if (VMBUS_ICVER_LE(nego->ic_ver[i], msg_ver)) {
|
|
if (!has_msg_ver) {
|
|
sel_msg_ver = nego->ic_ver[i];
|
|
has_msg_ver = true;
|
|
} else if (VMBUS_ICVER_GT(nego->ic_ver[i],
|
|
sel_msg_ver)) {
|
|
sel_msg_ver = nego->ic_ver[i];
|
|
}
|
|
}
|
|
}
|
|
if (!has_msg_ver) {
|
|
device_printf(sc->sc_dev, "failed to select message version\n");
|
|
goto done;
|
|
}
|
|
|
|
error = 0;
|
|
done:
|
|
if (bootverbose || !has_fw_ver || !has_msg_ver) {
|
|
if (has_fw_ver) {
|
|
device_printf(sc->sc_dev,
|
|
"sel framework version: %u.%u\n",
|
|
VMBUS_ICVER_MAJOR(sel_fw_ver),
|
|
VMBUS_ICVER_MINOR(sel_fw_ver));
|
|
}
|
|
for (i = 0; i < nego->ic_fwver_cnt; i++) {
|
|
device_printf(sc->sc_dev,
|
|
"supp framework version: %u.%u\n",
|
|
VMBUS_ICVER_MAJOR(nego->ic_ver[i]),
|
|
VMBUS_ICVER_MINOR(nego->ic_ver[i]));
|
|
}
|
|
|
|
if (has_msg_ver) {
|
|
device_printf(sc->sc_dev,
|
|
"sel message version: %u.%u\n",
|
|
VMBUS_ICVER_MAJOR(sel_msg_ver),
|
|
VMBUS_ICVER_MINOR(sel_msg_ver));
|
|
}
|
|
for (i = nego->ic_fwver_cnt;
|
|
i < nego->ic_fwver_cnt + nego->ic_msgver_cnt; i++) {
|
|
device_printf(sc->sc_dev,
|
|
"supp message version: %u.%u\n",
|
|
VMBUS_ICVER_MAJOR(nego->ic_ver[i]),
|
|
VMBUS_ICVER_MINOR(nego->ic_ver[i]));
|
|
}
|
|
}
|
|
if (error)
|
|
return error;
|
|
|
|
/* Record the selected versions. */
|
|
sc->sc_fwver = sel_fw_ver;
|
|
sc->sc_msgver = sel_msg_ver;
|
|
|
|
/* One framework version. */
|
|
nego->ic_fwver_cnt = 1;
|
|
nego->ic_ver[0] = sel_fw_ver;
|
|
|
|
/* One message version. */
|
|
nego->ic_msgver_cnt = 1;
|
|
nego->ic_ver[1] = sel_msg_ver;
|
|
|
|
/* Update data size. */
|
|
nego->ic_hdr.ic_dsize = VMBUS_IC_NEGOSZ -
|
|
sizeof(struct vmbus_icmsg_hdr);
|
|
|
|
/* Update total size, if necessary. */
|
|
if (dlen < VMBUS_IC_NEGOSZ)
|
|
*dlen0 = VMBUS_IC_NEGOSZ;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
vmbusic_sendresp(struct vmbusic_softc *sc, struct vmbus_channel *chan,
|
|
void *data, uint32_t dlen, uint64_t rid)
|
|
{
|
|
struct vmbus_icmsg_hdr *hdr;
|
|
int error;
|
|
|
|
KASSERTMSG(dlen >= sizeof(*hdr), "invalid data length %d", dlen);
|
|
hdr = data;
|
|
|
|
hdr->ic_flags = VMBUS_ICMSG_FLAG_TRANSACTION|VMBUS_ICMSG_FLAG_RESPONSE;
|
|
error = vmbus_channel_send(chan, data, dlen, rid,
|
|
VMBUS_CHANPKT_TYPE_INBAND, 0);
|
|
if (error != 0)
|
|
device_printf(sc->sc_dev, "resp send failed: %d\n", error);
|
|
return error;
|
|
}
|