OpenSolaris_b135/uts/sun4v/io/vsw_hio.c
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/debug.h>
#include <sys/time.h>
#include <sys/sysmacros.h>
#include <sys/systm.h>
#include <sys/user.h>
#include <sys/stropts.h>
#include <sys/stream.h>
#include <sys/strlog.h>
#include <sys/strsubr.h>
#include <sys/cmn_err.h>
#include <sys/cpu.h>
#include <sys/kmem.h>
#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/ksynch.h>
#include <sys/stat.h>
#include <sys/kstat.h>
#include <sys/vtrace.h>
#include <sys/strsun.h>
#include <sys/dlpi.h>
#include <sys/ethernet.h>
#include <net/if.h>
#include <sys/varargs.h>
#include <sys/machsystm.h>
#include <sys/modctl.h>
#include <sys/modhash.h>
#include <sys/mac_provider.h>
#include <sys/mac_ether.h>
#include <sys/taskq.h>
#include <sys/note.h>
#include <sys/mach_descrip.h>
#include <sys/mac.h>
#include <sys/mdeg.h>
#include <sys/ldc.h>
#include <sys/vsw_fdb.h>
#include <sys/vsw.h>
#include <sys/vio_mailbox.h>
#include <sys/vnet_mailbox.h>
#include <sys/vnet_common.h>
#include <sys/vio_util.h>
#include <sys/sdt.h>
#include <sys/atomic.h>
#include <sys/callb.h>
#define VSW_DDS_NEXT_REQID(vsharep) (++vsharep->vs_req_id)
extern boolean_t vsw_hio_enabled; /* HybridIO enabled? */
extern int vsw_hio_max_cleanup_retries;
extern int vsw_hio_cleanup_delay;
/* Functions imported from other files */
extern int vsw_send_msg(vsw_ldc_t *, void *, int, boolean_t);
extern void vsw_hio_port_reset(vsw_port_t *portp, boolean_t immediate);
extern void vsw_port_mac_reconfig(vsw_port_t *portp, boolean_t update_vlans,
uint16_t new_pvid, vsw_vlanid_t *new_vids, int new_nvids);
/* Functions exported to other files */
void vsw_hio_init(vsw_t *vswp);
void vsw_hio_cleanup(vsw_t *vswp);
void vsw_hio_start(vsw_t *vswp, vsw_ldc_t *ldcp);
void vsw_hio_stop(vsw_t *vswp, vsw_ldc_t *ldcp);
void vsw_process_dds_msg(vsw_t *vswp, vsw_ldc_t *ldcp, void *msg);
void vsw_hio_start_ports(vsw_t *vswp);
void vsw_hio_stop_port(vsw_port_t *portp);
/* Support functions */
static void vsw_hio_free_all_shares(vsw_t *vswp, boolean_t reboot);
static vsw_share_t *vsw_hio_alloc_share(vsw_t *vswp, vsw_ldc_t *ldcp);
static void vsw_hio_free_share(vsw_share_t *vsharep);
static vsw_share_t *vsw_hio_find_free_share(vsw_t *vswp);
static vsw_share_t *vsw_hio_find_vshare_ldcid(vsw_t *vswp, uint64_t ldc_id);
static vsw_share_t *vsw_hio_find_vshare_port(vsw_t *vswp, vsw_port_t *portp);
static int vsw_send_dds_msg(vsw_ldc_t *ldcp, uint8_t dds_subclass,
uint64_t cookie, uint64_t macaddr, uint32_t req_id);
static int vsw_send_dds_resp_msg(vsw_ldc_t *ldcp, vio_dds_msg_t *dmsg, int ack);
static int vsw_hio_send_delshare_msg(vsw_share_t *vsharep);
static boolean_t vsw_hio_reboot_callb(void *arg, int code);
static boolean_t vsw_hio_panic_callb(void *arg, int code);
/*
* Locking strategy for HybridIO is followed as below:
*
* - As the Shares are associated with a network device, the
* the global lock('vswp>mac_lock') is used for all Shares
* related operations.
* - The 'port->maccl_rwlock' is used to synchronize only the
* the operations that operate on that port's mac client. That
* is, the share_bind and unbind operations only.
*
* - The locking hierarchy follows that the global mac_lock is
* acquired first and then the ports mac client lock(maccl_rwlock)
*/
static kstat_t *vsw_hio_setup_kstats(char *ks_mod, char *ks_name, vsw_t *vswp);
static void vsw_hio_destroy_kstats(vsw_t *vswp);
static int vsw_hio_kstats_update(kstat_t *ksp, int rw);
/*
* vsw_hio_init -- Initialize the HybridIO related info.
* - Query SHARES and RINGS capability. Both capabilities
* need to be supported by the physical-device.
*/
void
vsw_hio_init(vsw_t *vswp)
{
vsw_hio_t *hiop = &vswp->vhio;
int num_shares;
int i;
ASSERT(MUTEX_HELD(&vswp->mac_lock));
D1(vswp, "%s:enter\n", __func__);
if (vsw_hio_enabled == B_FALSE) {
return;
}
vswp->hio_capable = B_FALSE;
num_shares = mac_share_capable(vswp->mh);
if (num_shares == 0) {
D2(vswp, "%s: %s is not HybridIO capable\n", __func__,
vswp->physname);
return;
}
hiop->vh_num_shares = num_shares;
hiop->vh_shares = kmem_zalloc((sizeof (vsw_share_t) *
hiop->vh_num_shares), KM_SLEEP);
for (i = 0; i < hiop->vh_num_shares; i++) {
hiop->vh_shares[i].vs_state = VSW_SHARE_FREE;
hiop->vh_shares[i].vs_index = i;
hiop->vh_shares[i].vs_vswp = vswp;
}
vswp->hio_capable = B_TRUE;
/*
* Register to get reboot and panic events so that
* we can cleanup HybridIO resources gracefully.
*/
vswp->hio_reboot_cb_id = callb_add(vsw_hio_reboot_callb,
(void *)vswp, CB_CL_MDBOOT, "vsw_hio");
vswp->hio_panic_cb_id = callb_add(vsw_hio_panic_callb,
(void *)vswp, CB_CL_PANIC, "vsw_hio");
/* setup kstats for hybrid resources */
hiop->vh_ksp = vsw_hio_setup_kstats(DRV_NAME, "hio", vswp);
if (hiop->vh_ksp == NULL) {
DERR(vswp, "%s: kstats setup failed", __func__);
}
D2(vswp, "%s: %s is HybridIO capable num_shares=%d\n", __func__,
vswp->physname, hiop->vh_num_shares);
D1(vswp, "%s:exit\n", __func__);
}
/*
* vsw_hio_alloc_share -- Allocate and setup the share for a guest domain.
* - Allocate a free share.
* - Bind the Guest's MAC address.
*/
static vsw_share_t *
vsw_hio_alloc_share(vsw_t *vswp, vsw_ldc_t *ldcp)
{
vsw_share_t *vsharep;
vsw_port_t *portp = ldcp->ldc_port;
uint64_t ldc_id = ldcp->ldc_id;
int rv;
D1(vswp, "%s:enter\n", __func__);
vsharep = vsw_hio_find_free_share(vswp);
if (vsharep == NULL) {
/* No free shares available */
return (NULL);
}
WRITE_ENTER(&portp->maccl_rwlock);
rv = mac_share_bind(portp->p_mch, ldc_id, &vsharep->vs_cookie);
RW_EXIT(&portp->maccl_rwlock);
if (rv != 0) {
return (NULL);
}
/* Cache some useful info */
vsharep->vs_ldcid = ldcp->ldc_id;
vsharep->vs_macaddr = vnet_macaddr_strtoul(
portp->p_macaddr.ether_addr_octet);
vsharep->vs_portp = ldcp->ldc_port;
vsharep->vs_state |= VSW_SHARE_ASSIGNED;
D1(vswp, "%s:exit\n", __func__);
return (vsharep);
}
/*
* vsw_hio_find_free_share -- Find a free Share.
*/
static vsw_share_t *
vsw_hio_find_free_share(vsw_t *vswp)
{
vsw_hio_t *hiop = &vswp->vhio;
vsw_share_t *vsharep;
int i;
D1(vswp, "%s:enter\n", __func__);
for (i = 0; i < hiop->vh_num_shares; i++) {
vsharep = &hiop->vh_shares[i];
if (vsharep->vs_state == VSW_SHARE_FREE) {
D1(vswp, "%s:Returning free share(%d)\n",
__func__, vsharep->vs_index);
return (vsharep);
}
}
D1(vswp, "%s:no free share\n", __func__);
return (NULL);
}
/*
* vsw_hio_find_vshare_ldcid -- Given ldc_id, find the corresponding
* share structure.
*/
static vsw_share_t *
vsw_hio_find_vshare_ldcid(vsw_t *vswp, uint64_t ldc_id)
{
vsw_hio_t *hiop = &vswp->vhio;
vsw_share_t *vsharep;
int i;
D1(vswp, "%s:enter, ldc=0x%lx", __func__, ldc_id);
for (i = 0; i < hiop->vh_num_shares; i++) {
vsharep = &hiop->vh_shares[i];
if (vsharep->vs_state == VSW_SHARE_FREE) {
continue;
}
if (vsharep->vs_ldcid == ldc_id) {
D1(vswp, "%s:returning share(%d)",
__func__, vsharep->vs_index);
return (vsharep);
}
}
D1(vswp, "%s:returning NULL", __func__);
return (NULL);
}
/*
* vsw_hio_find_vshare_port -- Given portp, find the corresponding
* share structure.
*/
static vsw_share_t *
vsw_hio_find_vshare_port(vsw_t *vswp, vsw_port_t *portp)
{
vsw_hio_t *hiop = &vswp->vhio;
vsw_share_t *vsharep;
int i;
D1(vswp, "%s:enter, portp=0x%p", __func__, portp);
for (i = 0; i < hiop->vh_num_shares; i++) {
vsharep = &hiop->vh_shares[i];
if (vsharep->vs_state == VSW_SHARE_FREE) {
continue;
}
if (vsharep->vs_portp == portp) {
D1(vswp, "%s:returning share(%d)",
__func__, vsharep->vs_index);
return (vsharep);
}
}
D1(vswp, "%s:returning NULL", __func__);
return (NULL);
}
/*
* vsw_hio_free_share -- Unbind the MAC address and free share.
*/
static void
vsw_hio_free_share(vsw_share_t *vsharep)
{
vsw_t *vswp = vsharep->vs_vswp;
vsw_port_t *portp = vsharep->vs_portp;
D1(vswp, "%s:enter\n", __func__);
WRITE_ENTER(&portp->maccl_rwlock);
mac_share_unbind(portp->p_mch);
RW_EXIT(&portp->maccl_rwlock);
vsharep->vs_state = VSW_SHARE_FREE;
vsharep->vs_macaddr = 0;
vsharep->vs_portp = NULL;
/* DERR only for printing by default */
DERR(vswp, "Share freed for ldc_id=0x%lx Cookie=0x%lX",
vsharep->vs_ldcid, vsharep->vs_cookie);
D1(vswp, "%s:exit\n", __func__);
}
/*
* vsw_hio_cleanup -- Cleanup the HybridIO. It unregisters the callbs
* and frees all shares.
*/
void
vsw_hio_cleanup(vsw_t *vswp)
{
D1(vswp, "%s:enter\n", __func__);
/* Unregister reboot and panic callbs. */
if (vswp->hio_reboot_cb_id) {
(void) callb_delete(vswp->hio_reboot_cb_id);
vswp->hio_reboot_cb_id = 0;
}
if (vswp->hio_panic_cb_id) {
(void) callb_delete(vswp->hio_panic_cb_id);
vswp->hio_panic_cb_id = 0;
}
vsw_hio_free_all_shares(vswp, B_FALSE);
vsw_hio_destroy_kstats(vswp);
D1(vswp, "%s:exit\n", __func__);
}
/*
* vsw_hio_free_all_shares -- A routine to free all shares gracefully.
* The following are the steps followed to accomplish this:
*
* - First clear 'hio_capable' to avoid further share allocations.
* - If a share is in accepted(ACKD) state, that means the guest
* has HybridIO setup etc. If so, send a DEL_SHARE message and
* give some time(delay) for the guest to ACK.
* - If the Share is another state, give some time to transition to
* ACKD state, then try the above.
* - After max retries, reset the ports to brute force the shares
* to be freed. Give a little delay for the LDC reset code to
* free the Share.
*/
static void
vsw_hio_free_all_shares(vsw_t *vswp, boolean_t reboot)
{
vsw_hio_t *hiop = &vswp->vhio;
vsw_port_list_t *plist = &vswp->plist;
vsw_share_t *vsharep;
int free_shares = 0;
int max_retries = vsw_hio_max_cleanup_retries;
int i;
D1(vswp, "%s:enter\n", __func__);
/*
* Acquire plist->lockrw to make the locking a bit easier
* and keep the ports in a stable state while we are cleaningup
* HybridIO.
*/
READ_ENTER(&plist->lockrw);
mutex_enter(&vswp->mac_lock);
/*
* first clear the hio_capable flag so that no more
* HybridIO operations are initiated.
*/
vswp->hio_capable = B_FALSE;
do {
free_shares = 0;
for (i = 0; i < hiop->vh_num_shares; i++) {
vsharep = &hiop->vh_shares[i];
if (vsharep->vs_state == VSW_SHARE_FREE) {
free_shares++;
continue;
}
/*
* If the share is in DDS_ACKD state, then
* send DEL_SHARE message so that guest can
* release its Hybrid resource.
*/
if (vsharep->vs_state & VSW_SHARE_DDS_ACKD) {
int rv;
/* send DDS_DEL_SHARE */
D1(vswp, "%s:sending DEL_SHARE msg for "
"share(%d)", __func__, vsharep->vs_index);
rv = vsw_hio_send_delshare_msg(vsharep);
if (rv != 0) {
/*
* No alternative, reset the port
* to force the release of Hybrid
* resources.
*/
vsw_hio_port_reset(vsharep->vs_portp,
B_FALSE);
}
}
if (max_retries == 1) {
/*
* Last retry, reset the port.
* If it is reboot case, issue an immediate
* reset.
*/
DWARN(vswp, "%s:All retries failed, "
" cause a reset to trigger cleanup for "
"share(%d)", __func__, vsharep->vs_index);
vsw_hio_port_reset(vsharep->vs_portp, reboot);
}
}
if (free_shares == hiop->vh_num_shares) {
/* Clean up is done */
break;
}
/*
* Release the lock so that reply for DEL_SHARE
* messages come and get processed, that is, shares
* get freed.
* This delay is also needed for the port reset to
* release the Hybrid resource.
*/
mutex_exit(&vswp->mac_lock);
drv_usecwait(vsw_hio_cleanup_delay);
mutex_enter(&vswp->mac_lock);
max_retries--;
} while ((free_shares < hiop->vh_num_shares) && (max_retries > 0));
/* By now, all shares should be freed */
if (free_shares != hiop->vh_num_shares) {
if (reboot == B_FALSE) {
cmn_err(CE_NOTE, "vsw%d: All physical resources "
"could not be freed", vswp->instance);
}
}
kmem_free(hiop->vh_shares, sizeof (vsw_share_t) * hiop->vh_num_shares);
hiop->vh_shares = NULL;
hiop->vh_num_shares = 0;
mutex_exit(&vswp->mac_lock);
RW_EXIT(&plist->lockrw);
D1(vswp, "%s:exit\n", __func__);
}
/*
* vsw_hio_start_ports -- Start HybridIO for ports that have
* already established connection before HybridIO is intialized.
*/
void
vsw_hio_start_ports(vsw_t *vswp)
{
vsw_port_list_t *plist = &vswp->plist;
vsw_port_t *portp;
vsw_share_t *vsharep;
boolean_t reset;
if (vswp->hio_capable == B_FALSE) {
return;
}
READ_ENTER(&plist->lockrw);
for (portp = plist->head; portp != NULL; portp = portp->p_next) {
if ((portp->p_hio_enabled == B_FALSE) ||
(portp->p_hio_capable == B_FALSE)) {
continue;
}
reset = B_FALSE;
mutex_enter(&vswp->mac_lock);
vsharep = vsw_hio_find_vshare_port(vswp, portp);
if (vsharep == NULL) {
reset = B_TRUE;
}
mutex_exit(&vswp->mac_lock);
if (reset == B_TRUE) {
/* Cause a rest to trigger HybridIO setup */
vsw_hio_port_reset(portp, B_FALSE);
}
}
RW_EXIT(&plist->lockrw);
}
/*
* vsw_hio_start -- Start HybridIO for a guest(given LDC)
*/
void
vsw_hio_start(vsw_t *vswp, vsw_ldc_t *ldcp)
{
vsw_share_t *vsharep;
uint32_t req_id;
int rv;
D1(vswp, "%s:enter ldc=0x%lx", __func__, ldcp->ldc_id);
mutex_enter(&vswp->mac_lock);
if (vswp->hio_capable == B_FALSE) {
mutex_exit(&vswp->mac_lock);
D2(vswp, "%s:not HIO capable", __func__);
return;
}
/* Verify if a share was already allocated */
vsharep = vsw_hio_find_vshare_ldcid(vswp, ldcp->ldc_id);
if (vsharep != NULL) {
mutex_exit(&vswp->mac_lock);
D2(vswp, "%s:Share already allocated to ldc=0x%lx",
__func__, ldcp->ldc_id);
return;
}
vsharep = vsw_hio_alloc_share(vswp, ldcp);
if (vsharep == NULL) {
mutex_exit(&vswp->mac_lock);
D2(vswp, "%s: no Share available for ldc=0x%lx",
__func__, ldcp->ldc_id);
return;
}
req_id = VSW_DDS_NEXT_REQID(vsharep);
rv = vsw_send_dds_msg(ldcp, DDS_VNET_ADD_SHARE, vsharep->vs_cookie,
vsharep->vs_macaddr, req_id);
if (rv != 0) {
/*
* Failed to send a DDS message, so cleanup now.
*/
vsw_hio_free_share(vsharep);
mutex_exit(&vswp->mac_lock);
return;
}
vsharep->vs_state &= ~VSW_SHARE_DDS_ACKD;
vsharep->vs_state |= VSW_SHARE_DDS_SENT;
mutex_exit(&vswp->mac_lock);
/* DERR only to print by default */
DERR(vswp, "Share allocated for ldc_id=0x%lx Cookie=0x%lX",
ldcp->ldc_id, vsharep->vs_cookie);
D1(vswp, "%s:exit ldc=0x%lx", __func__, ldcp->ldc_id);
}
/*
* vsw_hio_stop -- Stop/clean the HybridIO config for a guest(given ldc).
*/
void
vsw_hio_stop(vsw_t *vswp, vsw_ldc_t *ldcp)
{
vsw_share_t *vsharep;
D1(vswp, "%s:enter ldc=0x%lx", __func__, ldcp->ldc_id);
mutex_enter(&vswp->mac_lock);
vsharep = vsw_hio_find_vshare_ldcid(vswp, ldcp->ldc_id);
if (vsharep == NULL) {
D1(vswp, "%s:no share found for ldc=0x%lx",
__func__, ldcp->ldc_id);
mutex_exit(&vswp->mac_lock);
return;
}
vsw_hio_free_share(vsharep);
mutex_exit(&vswp->mac_lock);
D1(vswp, "%s:exit ldc=0x%lx", __func__, ldcp->ldc_id);
}
/*
* vsw_hio_send_delshare_msg -- Send a DEL_SHARE message to the guest.
*/
static int
vsw_hio_send_delshare_msg(vsw_share_t *vsharep)
{
vsw_t *vswp = vsharep->vs_vswp;
vsw_port_t *portp;
vsw_ldc_list_t *ldcl;
vsw_ldc_t *ldcp;
uint32_t req_id;
uint64_t cookie = vsharep->vs_cookie;
uint64_t macaddr = vsharep->vs_macaddr;
int rv;
ASSERT(MUTEX_HELD(&vswp->mac_lock));
mutex_exit(&vswp->mac_lock);
portp = vsharep->vs_portp;
if (portp == NULL) {
mutex_enter(&vswp->mac_lock);
return (0);
}
ldcl = &portp->p_ldclist;
READ_ENTER(&ldcl->lockrw);
ldcp = ldcl->head;
if ((ldcp == NULL) || (ldcp->ldc_id != vsharep->vs_ldcid)) {
RW_EXIT(&ldcl->lockrw);
mutex_enter(&vswp->mac_lock);
return (0);
}
req_id = VSW_DDS_NEXT_REQID(vsharep);
rv = vsw_send_dds_msg(ldcp, DDS_VNET_DEL_SHARE,
cookie, macaddr, req_id);
RW_EXIT(&ldcl->lockrw);
mutex_enter(&vswp->mac_lock);
if (rv == 0) {
vsharep->vs_state &= ~VSW_SHARE_DDS_ACKD;
vsharep->vs_state |= VSW_SHARE_DDS_SENT;
}
return (rv);
}
/*
* vsw_send_dds_msg -- Send a DDS message.
*/
static int
vsw_send_dds_msg(vsw_ldc_t *ldcp, uint8_t dds_subclass, uint64_t
cookie, uint64_t macaddr, uint32_t req_id)
{
vsw_t *vswp = ldcp->ldc_port->p_vswp;
vio_dds_msg_t vmsg;
dds_share_msg_t *smsg = &vmsg.msg.share_msg;
int rv;
D1(vswp, "%s:enter\n", __func__);
vmsg.tag.vio_msgtype = VIO_TYPE_CTRL;
vmsg.tag.vio_subtype = VIO_SUBTYPE_INFO;
vmsg.tag.vio_subtype_env = VIO_DDS_INFO;
vmsg.tag.vio_sid = ldcp->local_session;
vmsg.dds_class = DDS_VNET_NIU;
vmsg.dds_subclass = dds_subclass;
vmsg.dds_req_id = req_id;
smsg->macaddr = macaddr;
smsg->cookie = cookie;
rv = vsw_send_msg(ldcp, &vmsg, sizeof (vmsg), B_FALSE);
D1(vswp, "%s:exit rv=%d\n", __func__, rv);
return (rv);
}
/*
* vsw_process_dds_msg -- Process a DDS message received from a guest.
*/
void
vsw_process_dds_msg(vsw_t *vswp, vsw_ldc_t *ldcp, void *msg)
{
vsw_share_t *vsharep;
vio_dds_msg_t *dmsg = msg;
D1(vswp, "%s:enter ldc=0x%lx\n", __func__, ldcp->ldc_id);
if (dmsg->dds_class != DDS_VNET_NIU) {
/* discard */
return;
}
mutex_enter(&vswp->mac_lock);
/*
* We expect to receive DDS messages only from guests that
* have HybridIO started.
*/
vsharep = vsw_hio_find_vshare_ldcid(vswp, ldcp->ldc_id);
if (vsharep == NULL) {
mutex_exit(&vswp->mac_lock);
return;
}
switch (dmsg->dds_subclass) {
case DDS_VNET_ADD_SHARE:
/* A response for ADD_SHARE message. */
D1(vswp, "%s:DDS_VNET_ADD_SHARE\n", __func__);
if (!(vsharep->vs_state & VSW_SHARE_DDS_SENT)) {
DWARN(vswp, "%s: invalid ADD_SHARE response message "
" share state=0x%X", __func__, vsharep->vs_state);
break;
}
if (dmsg->dds_req_id != vsharep->vs_req_id) {
DWARN(vswp, "%s: invalid req_id in ADD_SHARE response"
" message req_id=0x%X share's req_id=0x%X",
__func__, dmsg->dds_req_id, vsharep->vs_req_id);
break;
}
if (dmsg->tag.vio_subtype == VIO_SUBTYPE_NACK) {
DWARN(vswp, "%s: NACK received for ADD_SHARE"
" message ldcid=0x%lx", __func__, ldcp->ldc_id);
/* cleanup for NACK */
vsw_hio_free_share(vsharep);
} else {
D2(vswp, "%s: ACK received for ADD_SHARE", __func__);
vsharep->vs_state &= ~VSW_SHARE_DDS_SENT;
vsharep->vs_state |= VSW_SHARE_DDS_ACKD;
}
break;
case DDS_VNET_DEL_SHARE:
/* A response for DEL_SHARE message */
D1(vswp, "%s:DDS_VNET_DEL_SHARE\n", __func__);
if (!(vsharep->vs_state & VSW_SHARE_DDS_SENT)) {
DWARN(vswp, "%s: invalid DEL_SHARE response message "
" share state=0x%X", __func__, vsharep->vs_state);
break;
}
if (dmsg->dds_req_id != vsharep->vs_req_id) {
DWARN(vswp, "%s: invalid req_id in DEL_SHARE response"
" message share req_id=0x%X share's req_id=0x%X",
__func__, dmsg->dds_req_id, vsharep->vs_req_id);
break;
}
if (dmsg->tag.vio_subtype == VIO_SUBTYPE_NACK) {
DWARN(vswp, "%s: NACK received for DEL_SHARE",
__func__);
}
/* There is nothing we can do, free share now */
vsw_hio_free_share(vsharep);
break;
case DDS_VNET_REL_SHARE:
/* Guest has released Share voluntarily, so free it now */
D1(vswp, "%s:DDS_VNET_REL_SHARE\n", __func__);
/* send ACK */
(void) vsw_send_dds_resp_msg(ldcp, dmsg, B_FALSE);
vsw_hio_free_share(vsharep);
break;
default:
DERR(vswp, "%s: Invalid DDS message type=0x%X",
__func__, dmsg->dds_subclass);
break;
}
mutex_exit(&vswp->mac_lock);
D1(vswp, "%s:exit ldc=0x%lx\n", __func__, ldcp->ldc_id);
}
/*
* vsw_send_dds_resp_msg -- Send a DDS response message.
*/
static int
vsw_send_dds_resp_msg(vsw_ldc_t *ldcp, vio_dds_msg_t *dmsg, int ack)
{
vsw_t *vswp = ldcp->ldc_port->p_vswp;
int rv;
D1(vswp, "%s:enter\n", __func__);
if (ack == B_TRUE) {
dmsg->tag.vio_subtype = VIO_SUBTYPE_ACK;
dmsg->msg.share_resp_msg.status = DDS_VNET_SUCCESS;
} else {
dmsg->tag.vio_subtype = VIO_SUBTYPE_NACK;
dmsg->msg.share_resp_msg.status = DDS_VNET_FAIL;
}
rv = vsw_send_msg(ldcp, dmsg, sizeof (vio_dds_msg_t), B_FALSE);
D1(vswp, "%s:exit rv=%d\n", __func__, rv);
return (rv);
}
/*
* vsw_hio_port_update -- update Hybrid mode change for a port.
*/
void
vsw_hio_port_update(vsw_port_t *portp, boolean_t hio_enabled)
{
/* Verify if the mode really changed */
if (portp->p_hio_enabled == hio_enabled) {
return;
}
if (hio_enabled == B_FALSE) {
/* Hybrid Mode is disabled, so stop HybridIO */
vsw_hio_stop_port(portp);
portp->p_hio_enabled = B_FALSE;
vsw_port_mac_reconfig(portp, B_FALSE, 0, NULL, 0);
} else {
portp->p_hio_enabled = B_TRUE;
vsw_port_mac_reconfig(portp, B_FALSE, 0, NULL, 0);
/* reset the port to initiate HybridIO setup */
vsw_hio_port_reset(portp, B_FALSE);
}
}
/*
* vsw_hio_stop_port -- Stop HybridIO for a given port. Sequence
* followed is similar to vsw_hio_free_all_shares().
*
*/
void
vsw_hio_stop_port(vsw_port_t *portp)
{
vsw_t *vswp = portp->p_vswp;
vsw_share_t *vsharep;
int max_retries = vsw_hio_max_cleanup_retries;
D1(vswp, "%s:enter\n", __func__);
mutex_enter(&vswp->mac_lock);
if (vswp->hio_capable == B_FALSE) {
mutex_exit(&vswp->mac_lock);
return;
}
vsharep = vsw_hio_find_vshare_port(vswp, portp);
if (vsharep == NULL) {
mutex_exit(&vswp->mac_lock);
return;
}
do {
if (vsharep->vs_state & VSW_SHARE_DDS_ACKD) {
int rv;
/* send DDS_DEL_SHARE */
D1(vswp, "%s:sending DEL_SHARE msg for "
"share(%d)", __func__, vsharep->vs_index);
rv = vsw_hio_send_delshare_msg(vsharep);
if (rv != 0) {
/*
* Cause a port reset to trigger
* cleanup.
*/
vsw_hio_port_reset(vsharep->vs_portp, B_FALSE);
}
}
if (max_retries == 1) {
/* last retry */
DWARN(vswp, "%s:All retries failed, "
" cause a reset to trigger cleanup for "
"share(%d)", __func__, vsharep->vs_index);
vsw_hio_port_reset(vsharep->vs_portp, B_FALSE);
}
/* Check if the share still assigned to this port */
if ((vsharep->vs_portp != portp) ||
(vsharep->vs_state == VSW_SHARE_FREE)) {
break;
}
/*
* Release the lock so that reply for DEL_SHARE
* messages come and get processed, that is, shares
* get freed.
*/
mutex_exit(&vswp->mac_lock);
drv_usecwait(vsw_hio_cleanup_delay);
mutex_enter(&vswp->mac_lock);
/* Check if the share still assigned to this port */
if ((vsharep->vs_portp != portp) ||
(vsharep->vs_state == VSW_SHARE_FREE)) {
break;
}
max_retries--;
} while ((vsharep->vs_state != VSW_SHARE_FREE) && (max_retries > 0));
mutex_exit(&vswp->mac_lock);
D1(vswp, "%s:exit\n", __func__);
}
/*
* vsw_hio_rest_all -- Resets all ports that have shares allocated.
* It is called only in the panic code path, so the LDC channels
* are reset immediately.
*/
static void
vsw_hio_reset_all(vsw_t *vswp)
{
vsw_hio_t *hiop = &vswp->vhio;
vsw_share_t *vsharep;
int i;
D1(vswp, "%s:enter\n", __func__);
if (vswp->hio_capable != B_TRUE)
return;
for (i = 0; i < hiop->vh_num_shares; i++) {
vsharep = &hiop->vh_shares[i];
if (vsharep->vs_state == VSW_SHARE_FREE) {
continue;
}
/*
* Reset the port with immediate flag enabled,
* to cause LDC reset immediately.
*/
vsw_hio_port_reset(vsharep->vs_portp, B_TRUE);
}
D1(vswp, "%s:exit\n", __func__);
}
/*
* vsw_hio_reboot_callb -- Called for reboot event. It tries to
* free all currently allocated shares.
*/
/* ARGSUSED */
static boolean_t
vsw_hio_reboot_callb(void *arg, int code)
{
vsw_t *vswp = arg;
D1(vswp, "%s:enter\n", __func__);
vsw_hio_free_all_shares(vswp, B_TRUE);
D1(vswp, "%s:exit\n", __func__);
return (B_TRUE);
}
/*
* vsw_hio_panic_callb -- Called from panic event. It resets all
* the ports that have shares allocated. This is done to
* trigger the cleanup in the guest ahead of HV reset.
*/
/* ARGSUSED */
static boolean_t
vsw_hio_panic_callb(void *arg, int code)
{
vsw_t *vswp = arg;
D1(vswp, "%s:enter\n", __func__);
vsw_hio_reset_all(vswp);
D1(vswp, "%s:exit\n", __func__);
return (B_TRUE);
}
/*
* Setup kstats for hio statistics.
*/
static kstat_t *
vsw_hio_setup_kstats(char *ks_mod, char *ks_name, vsw_t *vswp)
{
kstat_t *ksp;
vsw_hio_kstats_t *hiokp;
vsw_hio_t *hiop;
char share_assigned_info[MAXNAMELEN];
size_t size;
int i;
hiop = &vswp->vhio;
/*
* vsw_hio_stats_t structure is variable size structure
* having fields defined only for one share. So, we need
* allocate additional space for the rest of the shares.
*/
size = sizeof (vsw_hio_kstats_t) / sizeof (kstat_named_t);
ASSERT(hiop->vh_num_shares >= 1);
size += ((hiop->vh_num_shares - 1) * 2);
ksp = kstat_create(ks_mod, vswp->instance, ks_name, "misc",
KSTAT_TYPE_NAMED, size, KSTAT_FLAG_VIRTUAL);
if (ksp == NULL) {
return (NULL);
}
hiokp = (vsw_hio_kstats_t *)kmem_zalloc(sizeof (kstat_named_t) *
size, KM_SLEEP);
ksp->ks_data = hiokp;
hiop->vh_ksp = ksp;
hiop->vh_kstatsp = hiokp;
hiop->vh_kstat_size = size;
kstat_named_init(&hiokp->hio_capable, "hio_capable", KSTAT_DATA_CHAR);
kstat_named_init(&hiokp->hio_num_shares, "hio_num_shares",
KSTAT_DATA_ULONG);
for (i = 0; i < hiop->vh_num_shares; i++) {
(void) sprintf(share_assigned_info, "%s%d", "hio_share_", i);
kstat_named_init(&(hiokp->share[i].assigned),
share_assigned_info, KSTAT_DATA_ULONG);
(void) sprintf(share_assigned_info, "%s%d%s",
"hio_share_", i, "_state");
kstat_named_init(&(hiokp->share[i].state),
share_assigned_info, KSTAT_DATA_ULONG);
}
ksp->ks_update = vsw_hio_kstats_update;
ksp->ks_private = (void *)vswp;
kstat_install(ksp);
return (ksp);
}
/*
* Destroy hio kstats.
*/
static void
vsw_hio_destroy_kstats(vsw_t *vswp)
{
kstat_t *ksp;
vsw_hio_t *hiop;
ASSERT(vswp != NULL);
ksp = vswp->vhio.vh_ksp;
hiop = &vswp->vhio;
if (ksp != NULL) {
kmem_free(hiop->vh_kstatsp, sizeof (kstat_named_t) *
hiop->vh_kstat_size);
kstat_delete(ksp);
hiop->vh_kstatsp = NULL;
hiop->vh_ksp = NULL;
}
}
/*
* Update hio kstats.
*/
static int
vsw_hio_kstats_update(kstat_t *ksp, int rw)
{
vsw_t *vswp;
vsw_hio_t *hiop;
vsw_hio_kstats_t *hiokp;
int i;
vswp = (vsw_t *)ksp->ks_private;
ASSERT(vswp != NULL);
hiop = &vswp->vhio;
hiokp = hiop->vh_kstatsp;
if (rw == KSTAT_READ) {
if (vswp->hio_capable) {
(void) strcpy(hiokp->hio_capable.value.c, "Yes");
} else {
/* not hio capable, just return */
(void) strcpy(hiokp->hio_capable.value.c, "No");
return (0);
}
mutex_enter(&vswp->mac_lock);
hiokp->hio_num_shares.value.ul = (uint32_t)hiop->vh_num_shares;
for (i = 0; i < hiop->vh_num_shares; i++) {
hiokp->share[i].assigned.value.ul =
hiop->vh_shares[i].vs_macaddr;
hiokp->share[i].state.value.ul =
hiop->vh_shares[i].vs_state;
}
mutex_exit(&vswp->mac_lock);
} else {
return (EACCES);
}
return (0);
}