void
xpc_partition_going_down(struct xpc_partition *part, enum xp_retval reason)
{
unsigned long irq_flags;
int ch_number;
struct xpc_channel *ch;
dev_dbg(xpc_chan, "deactivating partition %d, reason=%d\n",
XPC_PARTID(part), reason);
if (!xpc_part_ref(part)) {
return;
}
for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
ch = &part->channels[ch_number];
xpc_msgqueue_ref(ch);
spin_lock_irqsave(&ch->lock, irq_flags);
XPC_DISCONNECT_CHANNEL(ch, reason, &irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
xpc_msgqueue_deref(ch);
}
xpc_wakeup_channel_mgr(part);
xpc_part_deref(part);
}
/*
* XPC's heartbeat code calls this function to inform XPC that a partition is
* going down. XPC responds by tearing down the XPartition Communication
* infrastructure used for the just downed partition.
*
* XPC's heartbeat code will never call this function and xpc_partition_up()
* at the same time. Nor will it ever make multiple calls to either function
* at the same time.
*/
void
xpc_partition_going_down(struct xpc_partition *part, enum xp_retval reason)
{
unsigned long irq_flags;
int ch_number;
struct xpc_channel *ch;
dev_dbg(xpc_chan, "deactivating partition %d, reason=%d\n",
XPC_PARTID(part), reason);
if (!xpc_part_ref(part)) {
/* infrastructure for this partition isn't currently set up */
return;
}
/* disconnect channels associated with the partition going down */
for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
ch = &part->channels[ch_number];
xpc_msgqueue_ref(ch);
spin_lock_irqsave(&ch->lock, irq_flags);
XPC_DISCONNECT_CHANNEL(ch, reason, &irq_flags);
spin_unlock_irqrestore(&ch->lock, irq_flags);
xpc_msgqueue_deref(ch);
}
xpc_wakeup_channel_mgr(part);
xpc_part_deref(part);
}
static void
xpc_send_chctl_local_msgrequest_uv(struct xpc_partition *part, int ch_number)
{
unsigned long irq_flags;
spin_lock_irqsave(&part->chctl_lock, irq_flags);
part->chctl.flags[ch_number] |= XPC_CHCTL_MSGREQUEST;
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
xpc_wakeup_channel_mgr(part);
}
void
xpc_disconnect_wait(int ch_number)
{
unsigned long irq_flags;
short partid;
struct xpc_partition *part;
struct xpc_channel *ch;
int wakeup_channel_mgr;
/* now wait for all callouts to the caller's function to cease */
for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
part = &xpc_partitions[partid];
if (!xpc_part_ref(part))
continue;
ch = &part->channels[ch_number];
if (!(ch->flags & XPC_C_WDISCONNECT)) {
xpc_part_deref(part);
continue;
}
wait_for_completion(&ch->wdisconnect_wait);
spin_lock_irqsave(&ch->lock, irq_flags);
DBUG_ON(!(ch->flags & XPC_C_DISCONNECTED));
wakeup_channel_mgr = 0;
if (ch->delayed_IPI_flags) {
if (part->act_state != XPC_P_DEACTIVATING) {
spin_lock(&part->IPI_lock);
XPC_SET_IPI_FLAGS(part->local_IPI_amo,
ch->number,
ch->delayed_IPI_flags);
spin_unlock(&part->IPI_lock);
wakeup_channel_mgr = 1;
}
ch->delayed_IPI_flags = 0;
}
ch->flags &= ~XPC_C_WDISCONNECT;
spin_unlock_irqrestore(&ch->lock, irq_flags);
if (wakeup_channel_mgr)
xpc_wakeup_channel_mgr(part);
xpc_part_deref(part);
}
}
void
xpc_disconnect_wait(int ch_number)
{
unsigned long irq_flags;
short partid;
struct xpc_partition *part;
struct xpc_channel *ch;
int wakeup_channel_mgr;
/* */
for (partid = 0; partid < xp_max_npartitions; partid++) {
part = &xpc_partitions[partid];
if (!xpc_part_ref(part))
continue;
ch = &part->channels[ch_number];
if (!(ch->flags & XPC_C_WDISCONNECT)) {
xpc_part_deref(part);
continue;
}
wait_for_completion(&ch->wdisconnect_wait);
spin_lock_irqsave(&ch->lock, irq_flags);
DBUG_ON(!(ch->flags & XPC_C_DISCONNECTED));
wakeup_channel_mgr = 0;
if (ch->delayed_chctl_flags) {
if (part->act_state != XPC_P_AS_DEACTIVATING) {
spin_lock(&part->chctl_lock);
part->chctl.flags[ch->number] |=
ch->delayed_chctl_flags;
spin_unlock(&part->chctl_lock);
wakeup_channel_mgr = 1;
}
ch->delayed_chctl_flags = 0;
}
ch->flags &= ~XPC_C_WDISCONNECT;
spin_unlock_irqrestore(&ch->lock, irq_flags);
if (wakeup_channel_mgr)
xpc_wakeup_channel_mgr(part);
xpc_part_deref(part);
}
}
void
xpc_initiate_connect(int ch_number)
{
short partid;
struct xpc_partition *part;
struct xpc_channel *ch;
DBUG_ON(ch_number < 0 || ch_number >= XPC_MAX_NCHANNELS);
for (partid = 0; partid < xp_max_npartitions; partid++) {
part = &xpc_partitions[partid];
if (xpc_part_ref(part)) {
ch = &part->channels[ch_number];
xpc_wakeup_channel_mgr(part);
xpc_part_deref(part);
}
}
}
/*
* See if the other side has responded to a partition deactivate request
* from us. Though we requested the remote partition to deactivate with regard
* to us, we really only need to wait for the other side to disengage from us.
*/
int
xpc_partition_disengaged(struct xpc_partition *part)
{
short partid = XPC_PARTID(part);
int disengaged;
disengaged = !xpc_partition_engaged(partid);
if (part->disengage_timeout) {
if (!disengaged) {
if (time_is_after_jiffies(part->disengage_timeout)) {
/* timelimit hasn't been reached yet */
return 0;
}
/*
* Other side hasn't responded to our deactivate
* request in a timely fashion, so assume it's dead.
*/
dev_info(xpc_part, "deactivate request to remote "
"partition %d timed out\n", partid);
xpc_disengage_timedout = 1;
xpc_assume_partition_disengaged(partid);
disengaged = 1;
}
part->disengage_timeout = 0;
/* cancel the timer function, provided it's not us */
if (!in_interrupt())
del_singleshot_timer_sync(&part->disengage_timer);
DBUG_ON(part->act_state != XPC_P_AS_DEACTIVATING &&
part->act_state != XPC_P_AS_INACTIVE);
if (part->act_state != XPC_P_AS_INACTIVE)
xpc_wakeup_channel_mgr(part);
xpc_cancel_partition_deactivation_request(part);
}
return disengaged;
}
/*
* Called by XP at the time of channel connection registration to cause
* XPC to establish connections to all currently active partitions.
*/
void
xpc_initiate_connect(int ch_number)
{
short partid;
struct xpc_partition *part;
struct xpc_channel *ch;
DBUG_ON(ch_number < 0 || ch_number >= XPC_MAX_NCHANNELS);
for (partid = 0; partid < xp_max_npartitions; partid++) {
part = &xpc_partitions[partid];
if (xpc_part_ref(part)) {
ch = &part->channels[ch_number];
/*
* Initiate the establishment of a connection on the
* newly registered channel to the remote partition.
*/
xpc_wakeup_channel_mgr(part);
xpc_part_deref(part);
}
}
}
static void
xpc_handle_activate_mq_msg_uv(struct xpc_partition *part,
struct xpc_activate_mq_msghdr_uv *msg_hdr,
int part_setup,
int *wakeup_hb_checker)
{
unsigned long irq_flags;
struct xpc_partition_uv *part_uv = &part->sn.uv;
struct xpc_openclose_args *args;
part_uv->remote_act_state = msg_hdr->act_state;
switch (msg_hdr->type) {
case XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV:
/* syncing of remote_act_state was just done above */
break;
case XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV: {
struct xpc_activate_mq_msg_activate_req_uv *msg;
/*
* ??? Do we deal here with ts_jiffies being different
* ??? if act_state != XPC_P_AS_INACTIVE instead of
* ??? below?
*/
msg = container_of(msg_hdr, struct
xpc_activate_mq_msg_activate_req_uv, hdr);
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
if (part_uv->act_state_req == 0)
xpc_activate_IRQ_rcvd++;
part_uv->act_state_req = XPC_P_ASR_ACTIVATE_UV;
part->remote_rp_pa = msg->rp_gpa; /* !!! _pa is _gpa */
part->remote_rp_ts_jiffies = msg_hdr->rp_ts_jiffies;
part_uv->heartbeat_gpa = msg->heartbeat_gpa;
if (msg->activate_gru_mq_desc_gpa !=
part_uv->activate_gru_mq_desc_gpa) {
spin_lock(&part_uv->flags_lock);
part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV;
spin_unlock(&part_uv->flags_lock);
part_uv->activate_gru_mq_desc_gpa =
msg->activate_gru_mq_desc_gpa;
}
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
(*wakeup_hb_checker)++;
break;
}
case XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV: {
struct xpc_activate_mq_msg_deactivate_req_uv *msg;
msg = container_of(msg_hdr, struct
xpc_activate_mq_msg_deactivate_req_uv, hdr);
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
if (part_uv->act_state_req == 0)
xpc_activate_IRQ_rcvd++;
part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
part_uv->reason = msg->reason;
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
(*wakeup_hb_checker)++;
return;
}
case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: {
struct xpc_activate_mq_msg_chctl_closerequest_uv *msg;
if (!part_setup)
break;
msg = container_of(msg_hdr, struct
xpc_activate_mq_msg_chctl_closerequest_uv,
hdr);
args = &part->remote_openclose_args[msg->ch_number];
args->reason = msg->reason;
spin_lock_irqsave(&part->chctl_lock, irq_flags);
part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREQUEST;
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
xpc_wakeup_channel_mgr(part);
break;
}
case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV: {
struct xpc_activate_mq_msg_chctl_closereply_uv *msg;
if (!part_setup)
break;
msg = container_of(msg_hdr, struct
xpc_activate_mq_msg_chctl_closereply_uv,
hdr);
spin_lock_irqsave(&part->chctl_lock, irq_flags);
part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREPLY;
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
xpc_wakeup_channel_mgr(part);
break;
}
case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV: {
struct xpc_activate_mq_msg_chctl_openrequest_uv *msg;
if (!part_setup)
break;
msg = container_of(msg_hdr, struct
xpc_activate_mq_msg_chctl_openrequest_uv,
hdr);
args = &part->remote_openclose_args[msg->ch_number];
args->entry_size = msg->entry_size;
args->local_nentries = msg->local_nentries;
spin_lock_irqsave(&part->chctl_lock, irq_flags);
part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREQUEST;
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
xpc_wakeup_channel_mgr(part);
break;
}
case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV: {
struct xpc_activate_mq_msg_chctl_openreply_uv *msg;
if (!part_setup)
break;
msg = container_of(msg_hdr, struct
xpc_activate_mq_msg_chctl_openreply_uv, hdr);
args = &part->remote_openclose_args[msg->ch_number];
args->remote_nentries = msg->remote_nentries;
args->local_nentries = msg->local_nentries;
args->local_msgqueue_pa = msg->notify_gru_mq_desc_gpa;
spin_lock_irqsave(&part->chctl_lock, irq_flags);
part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREPLY;
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
xpc_wakeup_channel_mgr(part);
break;
}
case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV: {
struct xpc_activate_mq_msg_chctl_opencomplete_uv *msg;
if (!part_setup)
break;
msg = container_of(msg_hdr, struct
xpc_activate_mq_msg_chctl_opencomplete_uv, hdr);
spin_lock_irqsave(&part->chctl_lock, irq_flags);
part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENCOMPLETE;
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
xpc_wakeup_channel_mgr(part);
}
case XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV:
spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
part_uv->flags |= XPC_P_ENGAGED_UV;
spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
break;
case XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV:
spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
part_uv->flags &= ~XPC_P_ENGAGED_UV;
spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
break;
default:
dev_err(xpc_part, "received unknown activate_mq msg type=%d "
"from partition=%d\n", msg_hdr->type, XPC_PARTID(part));
/* get hb checker to deactivate from the remote partition */
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
if (part_uv->act_state_req == 0)
xpc_activate_IRQ_rcvd++;
part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
part_uv->reason = xpBadMsgType;
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
(*wakeup_hb_checker)++;
return;
}
if (msg_hdr->rp_ts_jiffies != part->remote_rp_ts_jiffies &&
part->remote_rp_ts_jiffies != 0) {
/*
* ??? Does what we do here need to be sensitive to
* ??? act_state or remote_act_state?
*/
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
if (part_uv->act_state_req == 0)
xpc_activate_IRQ_rcvd++;
part_uv->act_state_req = XPC_P_ASR_REACTIVATE_UV;
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
(*wakeup_hb_checker)++;
}
}
static void
xpc_handle_activate_mq_msg_uv(struct xpc_partition *part,
struct xpc_activate_mq_msghdr_uv *msg_hdr,
int *wakeup_hb_checker)
{
unsigned long irq_flags;
struct xpc_partition_uv *part_uv = &part->sn.uv;
struct xpc_openclose_args *args;
part_uv->remote_act_state = msg_hdr->act_state;
switch (msg_hdr->type) {
case XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV:
break;
case XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV: {
struct xpc_activate_mq_msg_activate_req_uv *msg;
msg = container_of(msg_hdr, struct
xpc_activate_mq_msg_activate_req_uv, hdr);
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
if (part_uv->act_state_req == 0)
xpc_activate_IRQ_rcvd++;
part_uv->act_state_req = XPC_P_ASR_ACTIVATE_UV;
part->remote_rp_pa = msg->rp_gpa;
part->remote_rp_ts_jiffies = msg_hdr->rp_ts_jiffies;
part_uv->heartbeat_gpa = msg->heartbeat_gpa;
if (msg->activate_gru_mq_desc_gpa !=
part_uv->activate_gru_mq_desc_gpa) {
spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV;
spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
part_uv->activate_gru_mq_desc_gpa =
msg->activate_gru_mq_desc_gpa;
}
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
(*wakeup_hb_checker)++;
break;
}
case XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV: {
struct xpc_activate_mq_msg_deactivate_req_uv *msg;
msg = container_of(msg_hdr, struct
xpc_activate_mq_msg_deactivate_req_uv, hdr);
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
if (part_uv->act_state_req == 0)
xpc_activate_IRQ_rcvd++;
part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
part_uv->reason = msg->reason;
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
(*wakeup_hb_checker)++;
return;
}
case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: {
struct xpc_activate_mq_msg_chctl_closerequest_uv *msg;
msg = container_of(msg_hdr, struct
xpc_activate_mq_msg_chctl_closerequest_uv,
hdr);
args = &part->remote_openclose_args[msg->ch_number];
args->reason = msg->reason;
spin_lock_irqsave(&part->chctl_lock, irq_flags);
part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREQUEST;
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
xpc_wakeup_channel_mgr(part);
break;
}
case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV: {
struct xpc_activate_mq_msg_chctl_closereply_uv *msg;
msg = container_of(msg_hdr, struct
xpc_activate_mq_msg_chctl_closereply_uv,
hdr);
spin_lock_irqsave(&part->chctl_lock, irq_flags);
part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREPLY;
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
xpc_wakeup_channel_mgr(part);
break;
}
case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV: {
struct xpc_activate_mq_msg_chctl_openrequest_uv *msg;
msg = container_of(msg_hdr, struct
xpc_activate_mq_msg_chctl_openrequest_uv,
hdr);
args = &part->remote_openclose_args[msg->ch_number];
args->entry_size = msg->entry_size;
args->local_nentries = msg->local_nentries;
spin_lock_irqsave(&part->chctl_lock, irq_flags);
part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREQUEST;
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
xpc_wakeup_channel_mgr(part);
break;
}
case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV: {
struct xpc_activate_mq_msg_chctl_openreply_uv *msg;
msg = container_of(msg_hdr, struct
xpc_activate_mq_msg_chctl_openreply_uv, hdr);
args = &part->remote_openclose_args[msg->ch_number];
args->remote_nentries = msg->remote_nentries;
args->local_nentries = msg->local_nentries;
args->local_msgqueue_pa = msg->notify_gru_mq_desc_gpa;
spin_lock_irqsave(&part->chctl_lock, irq_flags);
part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREPLY;
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
xpc_wakeup_channel_mgr(part);
break;
}
case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV: {
struct xpc_activate_mq_msg_chctl_opencomplete_uv *msg;
msg = container_of(msg_hdr, struct
xpc_activate_mq_msg_chctl_opencomplete_uv, hdr);
spin_lock_irqsave(&part->chctl_lock, irq_flags);
part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENCOMPLETE;
spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
xpc_wakeup_channel_mgr(part);
}
case XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV:
spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
part_uv->flags |= XPC_P_ENGAGED_UV;
spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
break;
case XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV:
spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
part_uv->flags &= ~XPC_P_ENGAGED_UV;
spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
break;
default:
dev_err(xpc_part, "received unknown activate_mq msg type=%d "
"from partition=%d\n", msg_hdr->type, XPC_PARTID(part));
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
if (part_uv->act_state_req == 0)
xpc_activate_IRQ_rcvd++;
part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
part_uv->reason = xpBadMsgType;
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
(*wakeup_hb_checker)++;
return;
}
if (msg_hdr->rp_ts_jiffies != part->remote_rp_ts_jiffies &&
part->remote_rp_ts_jiffies != 0) {
spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
if (part_uv->act_state_req == 0)
xpc_activate_IRQ_rcvd++;
part_uv->act_state_req = XPC_P_ASR_REACTIVATE_UV;
spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
(*wakeup_hb_checker)++;
}
}