*
* Caveats:
*
- * . We currently have no way to determine which nasid an IPI came
- * from. Thus, xpc_IPI_send() does a remote AMO write followed by
- * an IPI. The AMO indicates where data is to be pulled from, so
- * after the IPI arrives, the remote partition checks the AMO word.
- * The IPI can actually arrive before the AMO however, so other code
- * must periodically check for this case. Also, remote AMO operations
- * do not reliably time out. Thus we do a remote PIO read solely to
- * know whether the remote partition is down and whether we should
- * stop sending IPIs to it. This remote PIO read operation is set up
- * in a special nofault region so SAL knows to ignore (and cleanup)
- * any errors due to the remote AMO write, PIO read, and/or PIO
- * write operations.
+ * . Currently on sn2, we have no way to determine which nasid an IRQ
+ * came from. Thus, xpc_send_IRQ_sn2() does a remote amo write
+ * followed by an IPI. The amo indicates where data is to be pulled
+ * from, so after the IPI arrives, the remote partition checks the amo
+ * word. The IPI can actually arrive before the amo however, so other
+ * code must periodically check for this case. Also, remote amo
+ * operations do not reliably time out. Thus we do a remote PIO read
+ * solely to know whether the remote partition is down and whether we
+ * should stop sending IPIs to it. This remote PIO read operation is
+ * set up in a special nofault region so SAL knows to ignore (and
+ * cleanup) any errors due to the remote amo write, PIO read, and/or
+ * PIO write operations.
*
* If/when new hardware solves this IPI problem, we should abandon
* the current approach.
*
*/
-#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/cache.h>
-#include <linux/interrupt.h>
+#include <linux/sysctl.h>
+#include <linux/device.h>
#include <linux/delay.h>
#include <linux/reboot.h>
-#include <linux/completion.h>
#include <linux/kdebug.h>
#include <linux/kthread.h>
-#include <linux/uaccess.h>
-#include <asm/sn/intr.h>
-#include <asm/sn/sn_sal.h>
#include "xpc.h"
/* define two XPC debug device structures to be used with dev_dbg() et al */
static int xpc_hb_check_min_interval = 10;
static int xpc_hb_check_max_interval = 120;
-int xpc_disengage_request_timelimit = XPC_DISENGAGE_REQUEST_DEFAULT_TIMELIMIT;
-static int xpc_disengage_request_min_timelimit; /* = 0 */
-static int xpc_disengage_request_max_timelimit = 120;
+int xpc_disengage_timelimit = XPC_DISENGAGE_DEFAULT_TIMELIMIT;
+static int xpc_disengage_min_timelimit; /* = 0 */
+static int xpc_disengage_max_timelimit = 120;
static ctl_table xpc_sys_xpc_hb_dir[] = {
{
.child = xpc_sys_xpc_hb_dir},
{
.ctl_name = CTL_UNNUMBERED,
- .procname = "disengage_request_timelimit",
- .data = &xpc_disengage_request_timelimit,
+ .procname = "disengage_timelimit",
+ .data = &xpc_disengage_timelimit,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_minmax,
.strategy = &sysctl_intvec,
- .extra1 = &xpc_disengage_request_min_timelimit,
- .extra2 = &xpc_disengage_request_max_timelimit},
+ .extra1 = &xpc_disengage_min_timelimit,
+ .extra2 = &xpc_disengage_max_timelimit},
{}
};
static ctl_table xpc_sys_dir[] = {
};
static struct ctl_table_header *xpc_sysctl;
-/* non-zero if any remote partition disengage request was timed out */
-int xpc_disengage_request_timedout;
+/* non-zero if any remote partition disengage was timed out */
+int xpc_disengage_timedout;
-/* #of IRQs received */
-static atomic_t xpc_act_IRQ_rcvd;
+/* #of activate IRQs received and not yet processed */
+int xpc_activate_IRQ_rcvd;
+DEFINE_SPINLOCK(xpc_activate_IRQ_rcvd_lock);
/* IRQ handler notifies this wait queue on receipt of an IRQ */
-static DECLARE_WAIT_QUEUE_HEAD(xpc_act_IRQ_wq);
+DECLARE_WAIT_QUEUE_HEAD(xpc_activate_IRQ_wq);
static unsigned long xpc_hb_check_timeout;
+static struct timer_list xpc_hb_timer;
+void *xpc_heartbeating_to_mask;
/* notification that the xpc_hb_checker thread has exited */
static DECLARE_COMPLETION(xpc_hb_checker_exited);
/* notification that the xpc_discovery thread has exited */
static DECLARE_COMPLETION(xpc_discovery_exited);
-static struct timer_list xpc_hb_timer;
-
static void xpc_kthread_waitmsgs(struct xpc_partition *, struct xpc_channel *);
static int xpc_system_reboot(struct notifier_block *, unsigned long, void *);
.notifier_call = xpc_system_die,
};
+int (*xpc_setup_partitions_sn) (void);
+enum xp_retval (*xpc_get_partition_rsvd_page_pa) (void *buf, u64 *cookie,
+ unsigned long *rp_pa,
+ size_t *len);
+int (*xpc_setup_rsvd_page_sn) (struct xpc_rsvd_page *rp);
+void (*xpc_heartbeat_init) (void);
+void (*xpc_heartbeat_exit) (void);
+void (*xpc_increment_heartbeat) (void);
+void (*xpc_offline_heartbeat) (void);
+void (*xpc_online_heartbeat) (void);
+enum xp_retval (*xpc_get_remote_heartbeat) (struct xpc_partition *part);
+
+enum xp_retval (*xpc_make_first_contact) (struct xpc_partition *part);
+void (*xpc_notify_senders_of_disconnect) (struct xpc_channel *ch);
+u64 (*xpc_get_chctl_all_flags) (struct xpc_partition *part);
+enum xp_retval (*xpc_setup_msg_structures) (struct xpc_channel *ch);
+void (*xpc_teardown_msg_structures) (struct xpc_channel *ch);
+void (*xpc_process_msg_chctl_flags) (struct xpc_partition *part, int ch_number);
+int (*xpc_n_of_deliverable_payloads) (struct xpc_channel *ch);
+void *(*xpc_get_deliverable_payload) (struct xpc_channel *ch);
+
+void (*xpc_request_partition_activation) (struct xpc_rsvd_page *remote_rp,
+ unsigned long remote_rp_pa,
+ int nasid);
+void (*xpc_request_partition_reactivation) (struct xpc_partition *part);
+void (*xpc_request_partition_deactivation) (struct xpc_partition *part);
+void (*xpc_cancel_partition_deactivation_request) (struct xpc_partition *part);
+
+void (*xpc_process_activate_IRQ_rcvd) (void);
+enum xp_retval (*xpc_setup_ch_structures_sn) (struct xpc_partition *part);
+void (*xpc_teardown_ch_structures_sn) (struct xpc_partition *part);
+
+void (*xpc_indicate_partition_engaged) (struct xpc_partition *part);
+int (*xpc_partition_engaged) (short partid);
+int (*xpc_any_partition_engaged) (void);
+void (*xpc_indicate_partition_disengaged) (struct xpc_partition *part);
+void (*xpc_assume_partition_disengaged) (short partid);
+
+void (*xpc_send_chctl_closerequest) (struct xpc_channel *ch,
+ unsigned long *irq_flags);
+void (*xpc_send_chctl_closereply) (struct xpc_channel *ch,
+ unsigned long *irq_flags);
+void (*xpc_send_chctl_openrequest) (struct xpc_channel *ch,
+ unsigned long *irq_flags);
+void (*xpc_send_chctl_openreply) (struct xpc_channel *ch,
+ unsigned long *irq_flags);
+
+void (*xpc_save_remote_msgqueue_pa) (struct xpc_channel *ch,
+ unsigned long msgqueue_pa);
+
+enum xp_retval (*xpc_send_payload) (struct xpc_channel *ch, u32 flags,
+ void *payload, u16 payload_size,
+ u8 notify_type, xpc_notify_func func,
+ void *key);
+void (*xpc_received_payload) (struct xpc_channel *ch, void *payload);
+
/*
- * Timer function to enforce the timelimit on the partition disengage request.
+ * Timer function to enforce the timelimit on the partition disengage.
*/
static void
-xpc_timeout_partition_disengage_request(unsigned long data)
+xpc_timeout_partition_disengage(unsigned long data)
{
struct xpc_partition *part = (struct xpc_partition *)data;
- DBUG_ON(time_before(jiffies, part->disengage_request_timeout));
+ DBUG_ON(time_is_after_jiffies(part->disengage_timeout));
(void)xpc_partition_disengaged(part);
- DBUG_ON(part->disengage_request_timeout != 0);
- DBUG_ON(xpc_partition_engaged(1UL << XPC_PARTID(part)) != 0);
-}
-
-/*
- * Notify the heartbeat check thread that an IRQ has been received.
- */
-static irqreturn_t
-xpc_act_IRQ_handler(int irq, void *dev_id)
-{
- atomic_inc(&xpc_act_IRQ_rcvd);
- wake_up_interruptible(&xpc_act_IRQ_wq);
- return IRQ_HANDLED;
+ DBUG_ON(part->disengage_timeout != 0);
+ DBUG_ON(xpc_partition_engaged(XPC_PARTID(part)));
}
/*
static void
xpc_hb_beater(unsigned long dummy)
{
- xpc_vars->heartbeat++;
+ xpc_increment_heartbeat();
- if (time_after_eq(jiffies, xpc_hb_check_timeout))
- wake_up_interruptible(&xpc_act_IRQ_wq);
+ if (time_is_before_eq_jiffies(xpc_hb_check_timeout))
+ wake_up_interruptible(&xpc_activate_IRQ_wq);
xpc_hb_timer.expires = jiffies + (xpc_hb_interval * HZ);
add_timer(&xpc_hb_timer);
}
+static void
+xpc_start_hb_beater(void)
+{
+ xpc_heartbeat_init();
+ init_timer(&xpc_hb_timer);
+ xpc_hb_timer.function = xpc_hb_beater;
+ xpc_hb_beater(0);
+}
+
+static void
+xpc_stop_hb_beater(void)
+{
+ del_timer_sync(&xpc_hb_timer);
+ xpc_heartbeat_exit();
+}
+
+/*
+ * At periodic intervals, scan through all active partitions and ensure
+ * their heartbeat is still active. If not, the partition is deactivated.
+ */
+static void
+xpc_check_remote_hb(void)
+{
+ struct xpc_partition *part;
+ short partid;
+ enum xp_retval ret;
+
+ for (partid = 0; partid < xp_max_npartitions; partid++) {
+
+ if (xpc_exiting)
+ break;
+
+ if (partid == xp_partition_id)
+ continue;
+
+ part = &xpc_partitions[partid];
+
+ if (part->act_state == XPC_P_AS_INACTIVE ||
+ part->act_state == XPC_P_AS_DEACTIVATING) {
+ continue;
+ }
+
+ ret = xpc_get_remote_heartbeat(part);
+ if (ret != xpSuccess)
+ XPC_DEACTIVATE_PARTITION(part, ret);
+ }
+}
+
/*
* This thread is responsible for nearly all of the partition
* activation/deactivation.
static int
xpc_hb_checker(void *ignore)
{
- int last_IRQ_count = 0;
- int new_IRQ_count;
int force_IRQ = 0;
- cpumask_of_cpu_ptr(cpumask, XPC_HB_CHECK_CPU);
/* this thread was marked active by xpc_hb_init() */
- set_cpus_allowed_ptr(current, cpumask);
+ set_cpus_allowed_ptr(current, &cpumask_of_cpu(XPC_HB_CHECK_CPU));
/* set our heartbeating to other partitions into motion */
xpc_hb_check_timeout = jiffies + (xpc_hb_check_interval * HZ);
- xpc_hb_beater(0);
+ xpc_start_hb_beater();
while (!xpc_exiting) {
dev_dbg(xpc_part, "woke up with %d ticks rem; %d IRQs have "
"been received\n",
(int)(xpc_hb_check_timeout - jiffies),
- atomic_read(&xpc_act_IRQ_rcvd) - last_IRQ_count);
+ xpc_activate_IRQ_rcvd);
/* checking of remote heartbeats is skewed by IRQ handling */
- if (time_after_eq(jiffies, xpc_hb_check_timeout)) {
+ if (time_is_before_eq_jiffies(xpc_hb_check_timeout)) {
+ xpc_hb_check_timeout = jiffies +
+ (xpc_hb_check_interval * HZ);
+
dev_dbg(xpc_part, "checking remote heartbeats\n");
xpc_check_remote_hb();
/*
- * We need to periodically recheck to ensure no
- * IPI/AMO pairs have been missed. That check
- * must always reset xpc_hb_check_timeout.
+ * On sn2 we need to periodically recheck to ensure no
+ * IRQ/amo pairs have been missed.
*/
- force_IRQ = 1;
+ if (is_shub())
+ force_IRQ = 1;
}
/* check for outstanding IRQs */
- new_IRQ_count = atomic_read(&xpc_act_IRQ_rcvd);
- if (last_IRQ_count < new_IRQ_count || force_IRQ != 0) {
+ if (xpc_activate_IRQ_rcvd > 0 || force_IRQ != 0) {
force_IRQ = 0;
-
- dev_dbg(xpc_part, "found an IRQ to process; will be "
- "resetting xpc_hb_check_timeout\n");
-
- last_IRQ_count += xpc_identify_act_IRQ_sender();
- if (last_IRQ_count < new_IRQ_count) {
- /* retry once to help avoid missing AMO */
- (void)xpc_identify_act_IRQ_sender();
- }
- last_IRQ_count = new_IRQ_count;
-
- xpc_hb_check_timeout = jiffies +
- (xpc_hb_check_interval * HZ);
+ dev_dbg(xpc_part, "processing activate IRQs "
+ "received\n");
+ xpc_process_activate_IRQ_rcvd();
}
/* wait for IRQ or timeout */
- (void)wait_event_interruptible(xpc_act_IRQ_wq,
- (last_IRQ_count <
- atomic_read(&xpc_act_IRQ_rcvd)
- || time_after_eq(jiffies,
- xpc_hb_check_timeout) ||
+ (void)wait_event_interruptible(xpc_activate_IRQ_wq,
+ (time_is_before_eq_jiffies(
+ xpc_hb_check_timeout) ||
+ xpc_activate_IRQ_rcvd > 0 ||
xpc_exiting));
}
+ xpc_stop_hb_beater();
+
dev_dbg(xpc_part, "heartbeat checker is exiting\n");
/* mark this thread as having exited */
return 0;
}
-/*
- * Establish first contact with the remote partititon. This involves pulling
- * the XPC per partition variables from the remote partition and waiting for
- * the remote partition to pull ours.
- */
-static enum xp_retval
-xpc_make_first_contact(struct xpc_partition *part)
-{
- enum xp_retval ret;
-
- while ((ret = xpc_pull_remote_vars_part(part)) != xpSuccess) {
- if (ret != xpRetry) {
- XPC_DEACTIVATE_PARTITION(part, ret);
- return ret;
- }
-
- dev_dbg(xpc_chan, "waiting to make first contact with "
- "partition %d\n", XPC_PARTID(part));
-
- /* wait a 1/4 of a second or so */
- (void)msleep_interruptible(250);
-
- if (part->act_state == XPC_P_DEACTIVATING)
- return part->reason;
- }
-
- return xpc_mark_partition_active(part);
-}
-
/*
* The first kthread assigned to a newly activated partition is the one
- * created by XPC HB with which it calls xpc_partition_up(). XPC hangs on to
+ * created by XPC HB with which it calls xpc_activating(). XPC hangs on to
* that kthread until the partition is brought down, at which time that kthread
* returns back to XPC HB. (The return of that kthread will signify to XPC HB
* that XPC has dismantled all communication infrastructure for the associated
static void
xpc_channel_mgr(struct xpc_partition *part)
{
- while (part->act_state != XPC_P_DEACTIVATING ||
+ while (part->act_state != XPC_P_AS_DEACTIVATING ||
atomic_read(&part->nchannels_active) > 0 ||
!xpc_partition_disengaged(part)) {
- xpc_process_channel_activity(part);
+ xpc_process_sent_chctl_flags(part);
/*
* Wait until we've been requested to activate kthreads or
atomic_dec(&part->channel_mgr_requests);
(void)wait_event_interruptible(part->channel_mgr_wq,
(atomic_read(&part->channel_mgr_requests) > 0 ||
- part->local_IPI_amo != 0 ||
- (part->act_state == XPC_P_DEACTIVATING &&
+ part->chctl.all_flags != 0 ||
+ (part->act_state == XPC_P_AS_DEACTIVATING &&
atomic_read(&part->nchannels_active) == 0 &&
xpc_partition_disengaged(part))));
atomic_set(&part->channel_mgr_requests, 1);
}
/*
- * When XPC HB determines that a partition has come up, it will create a new
- * kthread and that kthread will call this function to attempt to set up the
- * basic infrastructure used for Cross Partition Communication with the newly
- * upped partition.
- *
- * The kthread that was created by XPC HB and which setup the XPC
- * infrastructure will remain assigned to the partition until the partition
- * goes down. At which time the kthread will teardown the XPC infrastructure
- * and then exit.
- *
- * XPC HB will put the remote partition's XPC per partition specific variables
- * physical address into xpc_partitions[partid].remote_vars_part_pa prior to
- * calling xpc_partition_up().
+ * Guarantee that the kzalloc'd memory is cacheline aligned.
*/
-static void
-xpc_partition_up(struct xpc_partition *part)
+void *
+xpc_kzalloc_cacheline_aligned(size_t size, gfp_t flags, void **base)
+{
+ /* see if kzalloc will give us cachline aligned memory by default */
+ *base = kzalloc(size, flags);
+ if (*base == NULL)
+ return NULL;
+
+ if ((u64)*base == L1_CACHE_ALIGN((u64)*base))
+ return *base;
+
+ kfree(*base);
+
+ /* nope, we'll have to do it ourselves */
+ *base = kzalloc(size + L1_CACHE_BYTES, flags);
+ if (*base == NULL)
+ return NULL;
+
+ return (void *)L1_CACHE_ALIGN((u64)*base);
+}
+
+/*
+ * Setup the channel structures necessary to support XPartition Communication
+ * between the specified remote partition and the local one.
+ */
+static enum xp_retval
+xpc_setup_ch_structures(struct xpc_partition *part)
{
+ enum xp_retval ret;
+ int ch_number;
+ struct xpc_channel *ch;
+ short partid = XPC_PARTID(part);
+
+ /*
+ * Allocate all of the channel structures as a contiguous chunk of
+ * memory.
+ */
DBUG_ON(part->channels != NULL);
+ part->channels = kzalloc(sizeof(struct xpc_channel) * XPC_MAX_NCHANNELS,
+ GFP_KERNEL);
+ if (part->channels == NULL) {
+ dev_err(xpc_chan, "can't get memory for channels\n");
+ return xpNoMemory;
+ }
- dev_dbg(xpc_chan, "activating partition %d\n", XPC_PARTID(part));
+ /* allocate the remote open and close args */
- if (xpc_setup_infrastructure(part) != xpSuccess)
- return;
+ part->remote_openclose_args =
+ xpc_kzalloc_cacheline_aligned(XPC_OPENCLOSE_ARGS_SIZE,
+ GFP_KERNEL, &part->
+ remote_openclose_args_base);
+ if (part->remote_openclose_args == NULL) {
+ dev_err(xpc_chan, "can't get memory for remote connect args\n");
+ ret = xpNoMemory;
+ goto out_1;
+ }
+
+ part->chctl.all_flags = 0;
+ spin_lock_init(&part->chctl_lock);
+
+ atomic_set(&part->channel_mgr_requests, 1);
+ init_waitqueue_head(&part->channel_mgr_wq);
+
+ part->nchannels = XPC_MAX_NCHANNELS;
+
+ atomic_set(&part->nchannels_active, 0);
+ atomic_set(&part->nchannels_engaged, 0);
+
+ for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
+ ch = &part->channels[ch_number];
+
+ ch->partid = partid;
+ ch->number = ch_number;
+ ch->flags = XPC_C_DISCONNECTED;
+
+ atomic_set(&ch->kthreads_assigned, 0);
+ atomic_set(&ch->kthreads_idle, 0);
+ atomic_set(&ch->kthreads_active, 0);
+
+ atomic_set(&ch->references, 0);
+ atomic_set(&ch->n_to_notify, 0);
+
+ spin_lock_init(&ch->lock);
+ init_completion(&ch->wdisconnect_wait);
+
+ atomic_set(&ch->n_on_msg_allocate_wq, 0);
+ init_waitqueue_head(&ch->msg_allocate_wq);
+ init_waitqueue_head(&ch->idle_wq);
+ }
+
+ ret = xpc_setup_ch_structures_sn(part);
+ if (ret != xpSuccess)
+ goto out_2;
+
+ /*
+ * With the setting of the partition setup_state to XPC_P_SS_SETUP,
+ * we're declaring that this partition is ready to go.
+ */
+ part->setup_state = XPC_P_SS_SETUP;
+
+ return xpSuccess;
+
+ /* setup of ch structures failed */
+out_2:
+ kfree(part->remote_openclose_args_base);
+ part->remote_openclose_args = NULL;
+out_1:
+ kfree(part->channels);
+ part->channels = NULL;
+ return ret;
+}
+
+/*
+ * Teardown the channel structures necessary to support XPartition Communication
+ * between the specified remote partition and the local one.
+ */
+static void
+xpc_teardown_ch_structures(struct xpc_partition *part)
+{
+ DBUG_ON(atomic_read(&part->nchannels_engaged) != 0);
+ DBUG_ON(atomic_read(&part->nchannels_active) != 0);
/*
- * The kthread that XPC HB called us with will become the
- * channel manager for this partition. It will not return
- * back to XPC HB until the partition's XPC infrastructure
- * has been dismantled.
+ * Make this partition inaccessible to local processes by marking it
+ * as no longer setup. Then wait before proceeding with the teardown
+ * until all existing references cease.
*/
+ DBUG_ON(part->setup_state != XPC_P_SS_SETUP);
+ part->setup_state = XPC_P_SS_WTEARDOWN;
- (void)xpc_part_ref(part); /* this will always succeed */
+ wait_event(part->teardown_wq, (atomic_read(&part->references) == 0));
- if (xpc_make_first_contact(part) == xpSuccess)
- xpc_channel_mgr(part);
+ /* now we can begin tearing down the infrastructure */
- xpc_part_deref(part);
+ xpc_teardown_ch_structures_sn(part);
- xpc_teardown_infrastructure(part);
+ kfree(part->remote_openclose_args_base);
+ part->remote_openclose_args = NULL;
+ kfree(part->channels);
+ part->channels = NULL;
+
+ part->setup_state = XPC_P_SS_TORNDOWN;
}
+/*
+ * When XPC HB determines that a partition has come up, it will create a new
+ * kthread and that kthread will call this function to attempt to set up the
+ * basic infrastructure used for Cross Partition Communication with the newly
+ * upped partition.
+ *
+ * The kthread that was created by XPC HB and which setup the XPC
+ * infrastructure will remain assigned to the partition becoming the channel
+ * manager for that partition until the partition is deactivating, at which
+ * time the kthread will teardown the XPC infrastructure and then exit.
+ */
static int
xpc_activating(void *__partid)
{
struct xpc_partition *part = &xpc_partitions[partid];
unsigned long irq_flags;
- DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
+ DBUG_ON(partid < 0 || partid >= xp_max_npartitions);
spin_lock_irqsave(&part->act_lock, irq_flags);
- if (part->act_state == XPC_P_DEACTIVATING) {
- part->act_state = XPC_P_INACTIVE;
+ if (part->act_state == XPC_P_AS_DEACTIVATING) {
+ part->act_state = XPC_P_AS_INACTIVE;
spin_unlock_irqrestore(&part->act_lock, irq_flags);
part->remote_rp_pa = 0;
return 0;
}
/* indicate the thread is activating */
- DBUG_ON(part->act_state != XPC_P_ACTIVATION_REQ);
- part->act_state = XPC_P_ACTIVATING;
+ DBUG_ON(part->act_state != XPC_P_AS_ACTIVATION_REQ);
+ part->act_state = XPC_P_AS_ACTIVATING;
XPC_SET_REASON(part, 0, 0);
spin_unlock_irqrestore(&part->act_lock, irq_flags);
- dev_dbg(xpc_part, "bringing partition %d up\n", partid);
+ dev_dbg(xpc_part, "activating partition %d\n", partid);
- /*
- * Register the remote partition's AMOs with SAL so it can handle
- * and cleanup errors within that address range should the remote
- * partition go down. We don't unregister this range because it is
- * difficult to tell when outstanding writes to the remote partition
- * are finished and thus when it is safe to unregister. This should
- * not result in wasted space in the SAL xp_addr_region table because
- * we should get the same page for remote_amos_page_pa after module
- * reloads and system reboots.
- */
- if (sn_register_xp_addr_region(part->remote_amos_page_pa,
- PAGE_SIZE, 1) < 0) {
- dev_warn(xpc_part, "xpc_partition_up(%d) failed to register "
- "xp_addr region\n", partid);
+ xpc_allow_hb(partid);
- spin_lock_irqsave(&part->act_lock, irq_flags);
- part->act_state = XPC_P_INACTIVE;
- XPC_SET_REASON(part, xpPhysAddrRegFailed, __LINE__);
- spin_unlock_irqrestore(&part->act_lock, irq_flags);
- part->remote_rp_pa = 0;
- return 0;
- }
+ if (xpc_setup_ch_structures(part) == xpSuccess) {
+ (void)xpc_part_ref(part); /* this will always succeed */
- xpc_allow_hb(partid, xpc_vars);
- xpc_IPI_send_activated(part);
+ if (xpc_make_first_contact(part) == xpSuccess) {
+ xpc_mark_partition_active(part);
+ xpc_channel_mgr(part);
+ /* won't return until partition is deactivating */
+ }
- /*
- * xpc_partition_up() holds this thread and marks this partition as
- * XPC_P_ACTIVE by calling xpc_hb_mark_active().
- */
- (void)xpc_partition_up(part);
+ xpc_part_deref(part);
+ xpc_teardown_ch_structures(part);
+ }
- xpc_disallow_hb(partid, xpc_vars);
+ xpc_disallow_hb(partid);
xpc_mark_partition_inactive(part);
if (part->reason == xpReactivating) {
/* interrupting ourselves results in activating partition */
- xpc_IPI_send_reactivate(part);
+ xpc_request_partition_reactivation(part);
}
return 0;
spin_lock_irqsave(&part->act_lock, irq_flags);
- DBUG_ON(part->act_state != XPC_P_INACTIVE);
+ DBUG_ON(part->act_state != XPC_P_AS_INACTIVE);
- part->act_state = XPC_P_ACTIVATION_REQ;
+ part->act_state = XPC_P_AS_ACTIVATION_REQ;
XPC_SET_REASON(part, xpCloneKThread, __LINE__);
spin_unlock_irqrestore(&part->act_lock, irq_flags);
partid);
if (IS_ERR(kthread)) {
spin_lock_irqsave(&part->act_lock, irq_flags);
- part->act_state = XPC_P_INACTIVE;
+ part->act_state = XPC_P_AS_INACTIVE;
XPC_SET_REASON(part, xpCloneKThreadFailed, __LINE__);
spin_unlock_irqrestore(&part->act_lock, irq_flags);
}
}
-/*
- * Handle the receipt of a SGI_XPC_NOTIFY IRQ by seeing whether the specified
- * partition actually sent it. Since SGI_XPC_NOTIFY IRQs may be shared by more
- * than one partition, we use an AMO_t structure per partition to indicate
- * whether a partition has sent an IPI or not. If it has, then wake up the
- * associated kthread to handle it.
- *
- * All SGI_XPC_NOTIFY IRQs received by XPC are the result of IPIs sent by XPC
- * running on other partitions.
- *
- * Noteworthy Arguments:
- *
- * irq - Interrupt ReQuest number. NOT USED.
- *
- * dev_id - partid of IPI's potential sender.
- */
-irqreturn_t
-xpc_notify_IRQ_handler(int irq, void *dev_id)
-{
- short partid = (short)(u64)dev_id;
- struct xpc_partition *part = &xpc_partitions[partid];
-
- DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
-
- if (xpc_part_ref(part)) {
- xpc_check_for_channel_activity(part);
-
- xpc_part_deref(part);
- }
- return IRQ_HANDLED;
-}
-
-/*
- * Check to see if xpc_notify_IRQ_handler() dropped any IPIs on the floor
- * because the write to their associated IPI amo completed after the IRQ/IPI
- * was received.
- */
-void
-xpc_dropped_IPI_check(struct xpc_partition *part)
-{
- if (xpc_part_ref(part)) {
- xpc_check_for_channel_activity(part);
-
- part->dropped_IPI_timer.expires = jiffies +
- XPC_P_DROPPED_IPI_WAIT;
- add_timer(&part->dropped_IPI_timer);
- xpc_part_deref(part);
- }
-}
-
void
xpc_activate_kthreads(struct xpc_channel *ch, int needed)
{
do {
/* deliver messages to their intended recipients */
- while (ch->w_local_GP.get < ch->w_remote_GP.put &&
+ while (xpc_n_of_deliverable_payloads(ch) > 0 &&
!(ch->flags & XPC_C_DISCONNECTING)) {
- xpc_deliver_msg(ch);
+ xpc_deliver_payload(ch);
}
if (atomic_inc_return(&ch->kthreads_idle) >
"wait_event_interruptible_exclusive()\n");
(void)wait_event_interruptible_exclusive(ch->idle_wq,
- (ch->w_local_GP.get < ch->w_remote_GP.put ||
+ (xpc_n_of_deliverable_payloads(ch) > 0 ||
(ch->flags & XPC_C_DISCONNECTING)));
atomic_dec(&ch->kthreads_idle);
* additional kthreads to help deliver them. We only
* need one less than total #of messages to deliver.
*/
- n_needed = ch->w_remote_GP.put - ch->w_local_GP.get - 1;
+ n_needed = xpc_n_of_deliverable_payloads(ch) - 1;
if (n_needed > 0 && !(ch->flags & XPC_C_DISCONNECTING))
xpc_activate_kthreads(ch, n_needed);
}
spin_unlock_irqrestore(&ch->lock, irq_flags);
- if (atomic_dec_return(&ch->kthreads_assigned) == 0) {
- if (atomic_dec_return(&part->nchannels_engaged) == 0) {
- xpc_mark_partition_disengaged(part);
- xpc_IPI_send_disengage(part);
- }
+ if (atomic_dec_return(&ch->kthreads_assigned) == 0 &&
+ atomic_dec_return(&part->nchannels_engaged) == 0) {
+ xpc_indicate_partition_disengaged(part);
}
xpc_msgqueue_deref(ch);
} else if (ch->flags & XPC_C_DISCONNECTING) {
break;
- } else if (atomic_inc_return(&ch->kthreads_assigned) == 1) {
- if (atomic_inc_return(&part->nchannels_engaged) == 1)
- xpc_mark_partition_engaged(part);
+ } else if (atomic_inc_return(&ch->kthreads_assigned) == 1 &&
+ atomic_inc_return(&part->nchannels_engaged) == 1) {
+ xpc_indicate_partition_engaged(part);
}
(void)xpc_part_ref(part);
xpc_msgqueue_ref(ch);
if (atomic_dec_return(&ch->kthreads_assigned) == 0 &&
atomic_dec_return(&part->nchannels_engaged) == 0) {
- xpc_mark_partition_disengaged(part);
- xpc_IPI_send_disengage(part);
+ xpc_indicate_partition_disengaged(part);
}
xpc_msgqueue_deref(ch);
xpc_part_deref(part);
int wakeup_channel_mgr;
/* now wait for all callouts to the caller's function to cease */
- for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
+ for (partid = 0; partid < xp_max_npartitions; partid++) {
part = &xpc_partitions[partid];
if (!xpc_part_ref(part))
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);
+ 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_IPI_flags = 0;
+ ch->delayed_chctl_flags = 0;
}
ch->flags &= ~XPC_C_WDISCONNECT;
}
}
+static int
+xpc_setup_partitions(void)
+{
+ short partid;
+ struct xpc_partition *part;
+
+ xpc_partitions = kzalloc(sizeof(struct xpc_partition) *
+ xp_max_npartitions, GFP_KERNEL);
+ if (xpc_partitions == NULL) {
+ dev_err(xpc_part, "can't get memory for partition structure\n");
+ return -ENOMEM;
+ }
+
+ /*
+ * The first few fields of each entry of xpc_partitions[] need to
+ * be initialized now so that calls to xpc_connect() and
+ * xpc_disconnect() can be made prior to the activation of any remote
+ * partition. NOTE THAT NONE OF THE OTHER FIELDS BELONGING TO THESE
+ * ENTRIES ARE MEANINGFUL UNTIL AFTER AN ENTRY'S CORRESPONDING
+ * PARTITION HAS BEEN ACTIVATED.
+ */
+ for (partid = 0; partid < xp_max_npartitions; partid++) {
+ part = &xpc_partitions[partid];
+
+ DBUG_ON((u64)part != L1_CACHE_ALIGN((u64)part));
+
+ part->activate_IRQ_rcvd = 0;
+ spin_lock_init(&part->act_lock);
+ part->act_state = XPC_P_AS_INACTIVE;
+ XPC_SET_REASON(part, 0, 0);
+
+ init_timer(&part->disengage_timer);
+ part->disengage_timer.function =
+ xpc_timeout_partition_disengage;
+ part->disengage_timer.data = (unsigned long)part;
+
+ part->setup_state = XPC_P_SS_UNSET;
+ init_waitqueue_head(&part->teardown_wq);
+ atomic_set(&part->references, 0);
+ }
+
+ return xpc_setup_partitions_sn();
+}
+
+static void
+xpc_teardown_partitions(void)
+{
+ kfree(xpc_partitions);
+}
+
static void
xpc_do_exit(enum xp_retval reason)
{
short partid;
int active_part_count, printed_waiting_msg = 0;
struct xpc_partition *part;
- unsigned long printmsg_time, disengage_request_timeout = 0;
+ unsigned long printmsg_time, disengage_timeout = 0;
/* a 'rmmod XPC' and a 'reboot' cannot both end up here together */
DBUG_ON(xpc_exiting == 1);
* the heartbeat checker thread in case it's sleeping.
*/
xpc_exiting = 1;
- wake_up_interruptible(&xpc_act_IRQ_wq);
-
- /* ignore all incoming interrupts */
- free_irq(SGI_XPC_ACTIVATE, NULL);
+ wake_up_interruptible(&xpc_activate_IRQ_wq);
/* wait for the discovery thread to exit */
wait_for_completion(&xpc_discovery_exited);
/* wait for all partitions to become inactive */
- printmsg_time = jiffies + (XPC_DISENGAGE_PRINTMSG_INTERVAL * HZ);
- xpc_disengage_request_timedout = 0;
+ printmsg_time = jiffies + (XPC_DEACTIVATE_PRINTMSG_INTERVAL * HZ);
+ xpc_disengage_timedout = 0;
do {
active_part_count = 0;
- for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
+ for (partid = 0; partid < xp_max_npartitions; partid++) {
part = &xpc_partitions[partid];
if (xpc_partition_disengaged(part) &&
- part->act_state == XPC_P_INACTIVE) {
+ part->act_state == XPC_P_AS_INACTIVE) {
continue;
}
XPC_DEACTIVATE_PARTITION(part, reason);
- if (part->disengage_request_timeout >
- disengage_request_timeout) {
- disengage_request_timeout =
- part->disengage_request_timeout;
- }
+ if (part->disengage_timeout > disengage_timeout)
+ disengage_timeout = part->disengage_timeout;
}
- if (xpc_partition_engaged(-1UL)) {
- if (time_after(jiffies, printmsg_time)) {
+ if (xpc_any_partition_engaged()) {
+ if (time_is_before_jiffies(printmsg_time)) {
dev_info(xpc_part, "waiting for remote "
- "partitions to disengage, timeout in "
- "%ld seconds\n",
- (disengage_request_timeout - jiffies)
- / HZ);
+ "partitions to deactivate, timeout in "
+ "%ld seconds\n", (disengage_timeout -
+ jiffies) / HZ);
printmsg_time = jiffies +
- (XPC_DISENGAGE_PRINTMSG_INTERVAL * HZ);
+ (XPC_DEACTIVATE_PRINTMSG_INTERVAL * HZ);
printed_waiting_msg = 1;
}
} else if (active_part_count > 0) {
if (printed_waiting_msg) {
dev_info(xpc_part, "waiting for local partition"
- " to disengage\n");
+ " to deactivate\n");
printed_waiting_msg = 0;
}
} else {
- if (!xpc_disengage_request_timedout) {
+ if (!xpc_disengage_timedout) {
dev_info(xpc_part, "all partitions have "
- "disengaged\n");
+ "deactivated\n");
}
break;
}
} while (1);
- DBUG_ON(xpc_partition_engaged(-1UL));
+ DBUG_ON(xpc_any_partition_engaged());
+ DBUG_ON(xpc_any_hbs_allowed() != 0);
- /* indicate to others that our reserved page is uninitialized */
- xpc_rsvd_page->vars_pa = 0;
-
- /* now it's time to eliminate our heartbeat */
- del_timer_sync(&xpc_hb_timer);
- DBUG_ON(xpc_vars->heartbeating_to_mask != 0);
+ xpc_teardown_rsvd_page();
if (reason == xpUnloading) {
- /* take ourselves off of the reboot_notifier_list */
- (void)unregister_reboot_notifier(&xpc_reboot_notifier);
-
- /* take ourselves off of the die_notifier list */
(void)unregister_die_notifier(&xpc_die_notifier);
+ (void)unregister_reboot_notifier(&xpc_reboot_notifier);
}
- /* close down protections for IPI operations */
- xpc_restrict_IPI_ops();
-
/* clear the interface to XPC's functions */
xpc_clear_interface();
if (xpc_sysctl)
unregister_sysctl_table(xpc_sysctl);
- kfree(xpc_remote_copy_buffer_base);
+ xpc_teardown_partitions();
+
+ if (is_shub())
+ xpc_exit_sn2();
+ else
+ xpc_exit_uv();
}
/*
}
/*
- * Notify other partitions to disengage from all references to our memory.
+ * Notify other partitions to deactivate from us by first disengaging from all
+ * references to our memory.
*/
static void
-xpc_die_disengage(void)
+xpc_die_deactivate(void)
{
struct xpc_partition *part;
short partid;
- unsigned long engaged;
- long time, printmsg_time, disengage_request_timeout;
+ int any_engaged;
+ long keep_waiting;
+ long wait_to_print;
/* keep xpc_hb_checker thread from doing anything (just in case) */
xpc_exiting = 1;
- xpc_vars->heartbeating_to_mask = 0; /* indicate we're deactivated */
+ xpc_disallow_all_hbs(); /*indicate we're deactivated */
- for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
+ for (partid = 0; partid < xp_max_npartitions; partid++) {
part = &xpc_partitions[partid];
- if (!XPC_SUPPORTS_DISENGAGE_REQUEST(part->
- remote_vars_version)) {
-
- /* just in case it was left set by an earlier XPC */
- xpc_clear_partition_engaged(1UL << partid);
- continue;
- }
-
- if (xpc_partition_engaged(1UL << partid) ||
- part->act_state != XPC_P_INACTIVE) {
- xpc_request_partition_disengage(part);
- xpc_mark_partition_disengaged(part);
- xpc_IPI_send_disengage(part);
+ if (xpc_partition_engaged(partid) ||
+ part->act_state != XPC_P_AS_INACTIVE) {
+ xpc_request_partition_deactivation(part);
+ xpc_indicate_partition_disengaged(part);
}
}
- time = rtc_time();
- printmsg_time = time +
- (XPC_DISENGAGE_PRINTMSG_INTERVAL * sn_rtc_cycles_per_second);
- disengage_request_timeout = time +
- (xpc_disengage_request_timelimit * sn_rtc_cycles_per_second);
-
- /* wait for all other partitions to disengage from us */
+ /*
+ * Though we requested that all other partitions deactivate from us,
+ * we only wait until they've all disengaged or we've reached the
+ * defined timelimit.
+ *
+ * Given that one iteration through the following while-loop takes
+ * approximately 200 microseconds, calculate the #of loops to take
+ * before bailing and the #of loops before printing a waiting message.
+ */
+ keep_waiting = xpc_disengage_timelimit * 1000 * 5;
+ wait_to_print = XPC_DEACTIVATE_PRINTMSG_INTERVAL * 1000 * 5;
while (1) {
- engaged = xpc_partition_engaged(-1UL);
- if (!engaged) {
- dev_info(xpc_part, "all partitions have disengaged\n");
+ any_engaged = xpc_any_partition_engaged();
+ if (!any_engaged) {
+ dev_info(xpc_part, "all partitions have deactivated\n");
break;
}
- time = rtc_time();
- if (time >= disengage_request_timeout) {
- for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
- if (engaged & (1UL << partid)) {
- dev_info(xpc_part, "disengage from "
+ if (!keep_waiting--) {
+ for (partid = 0; partid < xp_max_npartitions;
+ partid++) {
+ if (xpc_partition_engaged(partid)) {
+ dev_info(xpc_part, "deactivate from "
"remote partition %d timed "
"out\n", partid);
}
break;
}
- if (time >= printmsg_time) {
+ if (!wait_to_print--) {
dev_info(xpc_part, "waiting for remote partitions to "
- "disengage, timeout in %ld seconds\n",
- (disengage_request_timeout - time) /
- sn_rtc_cycles_per_second);
- printmsg_time = time +
- (XPC_DISENGAGE_PRINTMSG_INTERVAL *
- sn_rtc_cycles_per_second);
+ "deactivate, timeout in %ld seconds\n",
+ keep_waiting / (1000 * 5));
+ wait_to_print = XPC_DEACTIVATE_PRINTMSG_INTERVAL *
+ 1000 * 5;
}
+
+ udelay(200);
}
}
static int
xpc_system_die(struct notifier_block *nb, unsigned long event, void *unused)
{
+#ifdef CONFIG_IA64 /* !!! temporary kludge */
switch (event) {
case DIE_MACHINE_RESTART:
case DIE_MACHINE_HALT:
- xpc_die_disengage();
+ xpc_die_deactivate();
break;
case DIE_KDEBUG_ENTER:
/* fall through */
case DIE_MCA_MONARCH_ENTER:
case DIE_INIT_MONARCH_ENTER:
- xpc_vars->heartbeat++;
- xpc_vars->heartbeat_offline = 1;
+ xpc_offline_heartbeat();
break;
case DIE_KDEBUG_LEAVE:
/* fall through */
case DIE_MCA_MONARCH_LEAVE:
case DIE_INIT_MONARCH_LEAVE:
- xpc_vars->heartbeat++;
- xpc_vars->heartbeat_offline = 0;
+ xpc_online_heartbeat();
break;
}
+#else
+ xpc_die_deactivate();
+#endif
return NOTIFY_DONE;
}
xpc_init(void)
{
int ret;
- short partid;
- struct xpc_partition *part;
struct task_struct *kthread;
- size_t buf_size;
-
- if (!ia64_platform_is("sn2"))
- return -ENODEV;
-
- buf_size = max(XPC_RP_VARS_SIZE,
- XPC_RP_HEADER_SIZE + XP_NASID_MASK_BYTES);
- xpc_remote_copy_buffer = xpc_kmalloc_cacheline_aligned(buf_size,
- GFP_KERNEL,
- &xpc_remote_copy_buffer_base);
- if (xpc_remote_copy_buffer == NULL)
- return -ENOMEM;
snprintf(xpc_part->bus_id, BUS_ID_SIZE, "part");
snprintf(xpc_chan->bus_id, BUS_ID_SIZE, "chan");
- xpc_sysctl = register_sysctl_table(xpc_sys_dir);
-
- /*
- * The first few fields of each entry of xpc_partitions[] need to
- * be initialized now so that calls to xpc_connect() and
- * xpc_disconnect() can be made prior to the activation of any remote
- * partition. NOTE THAT NONE OF THE OTHER FIELDS BELONGING TO THESE
- * ENTRIES ARE MEANINGFUL UNTIL AFTER AN ENTRY'S CORRESPONDING
- * PARTITION HAS BEEN ACTIVATED.
- */
- for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
- part = &xpc_partitions[partid];
-
- DBUG_ON((u64)part != L1_CACHE_ALIGN((u64)part));
-
- part->act_IRQ_rcvd = 0;
- spin_lock_init(&part->act_lock);
- part->act_state = XPC_P_INACTIVE;
- XPC_SET_REASON(part, 0, 0);
+ if (is_shub()) {
+ /*
+ * The ia64-sn2 architecture supports at most 64 partitions.
+ * And the inability to unregister remote amos restricts us
+ * further to only support exactly 64 partitions on this
+ * architecture, no less.
+ */
+ if (xp_max_npartitions != 64) {
+ dev_err(xpc_part, "max #of partitions not set to 64\n");
+ ret = -EINVAL;
+ } else {
+ ret = xpc_init_sn2();
+ }
- init_timer(&part->disengage_request_timer);
- part->disengage_request_timer.function =
- xpc_timeout_partition_disengage_request;
- part->disengage_request_timer.data = (unsigned long)part;
+ } else if (is_uv()) {
+ ret = xpc_init_uv();
- part->setup_state = XPC_P_UNSET;
- init_waitqueue_head(&part->teardown_wq);
- atomic_set(&part->references, 0);
+ } else {
+ ret = -ENODEV;
}
- /*
- * Open up protections for IPI operations (and AMO operations on
- * Shub 1.1 systems).
- */
- xpc_allow_IPI_ops();
-
- /*
- * Interrupts being processed will increment this atomic variable and
- * awaken the heartbeat thread which will process the interrupts.
- */
- atomic_set(&xpc_act_IRQ_rcvd, 0);
+ if (ret != 0)
+ return ret;
- /*
- * This is safe to do before the xpc_hb_checker thread has started
- * because the handler releases a wait queue. If an interrupt is
- * received before the thread is waiting, it will not go to sleep,
- * but rather immediately process the interrupt.
- */
- ret = request_irq(SGI_XPC_ACTIVATE, xpc_act_IRQ_handler, 0,
- "xpc hb", NULL);
+ ret = xpc_setup_partitions();
if (ret != 0) {
- dev_err(xpc_part, "can't register ACTIVATE IRQ handler, "
- "errno=%d\n", -ret);
-
- xpc_restrict_IPI_ops();
-
- if (xpc_sysctl)
- unregister_sysctl_table(xpc_sysctl);
-
- kfree(xpc_remote_copy_buffer_base);
- return -EBUSY;
+ dev_err(xpc_part, "can't get memory for partition structure\n");
+ goto out_1;
}
+ xpc_sysctl = register_sysctl_table(xpc_sys_dir);
+
/*
* Fill the partition reserved page with the information needed by
* other partitions to discover we are alive and establish initial
* communications.
*/
- xpc_rsvd_page = xpc_rsvd_page_init();
- if (xpc_rsvd_page == NULL) {
- dev_err(xpc_part, "could not setup our reserved page\n");
-
- free_irq(SGI_XPC_ACTIVATE, NULL);
- xpc_restrict_IPI_ops();
-
- if (xpc_sysctl)
- unregister_sysctl_table(xpc_sysctl);
-
- kfree(xpc_remote_copy_buffer_base);
- return -EBUSY;
+ ret = xpc_setup_rsvd_page();
+ if (ret != 0) {
+ dev_err(xpc_part, "can't setup our reserved page\n");
+ goto out_2;
}
/* add ourselves to the reboot_notifier_list */
if (ret != 0)
dev_warn(xpc_part, "can't register die notifier\n");
- init_timer(&xpc_hb_timer);
- xpc_hb_timer.function = xpc_hb_beater;
-
/*
* The real work-horse behind xpc. This processes incoming
* interrupts and monitors remote heartbeats.
kthread = kthread_run(xpc_hb_checker, NULL, XPC_HB_CHECK_THREAD_NAME);
if (IS_ERR(kthread)) {
dev_err(xpc_part, "failed while forking hb check thread\n");
-
- /* indicate to others that our reserved page is uninitialized */
- xpc_rsvd_page->vars_pa = 0;
-
- /* take ourselves off of the reboot_notifier_list */
- (void)unregister_reboot_notifier(&xpc_reboot_notifier);
-
- /* take ourselves off of the die_notifier list */
- (void)unregister_die_notifier(&xpc_die_notifier);
-
- del_timer_sync(&xpc_hb_timer);
- free_irq(SGI_XPC_ACTIVATE, NULL);
- xpc_restrict_IPI_ops();
-
- if (xpc_sysctl)
- unregister_sysctl_table(xpc_sysctl);
-
- kfree(xpc_remote_copy_buffer_base);
- return -EBUSY;
+ ret = -EBUSY;
+ goto out_3;
}
/*
/* set the interface to point at XPC's functions */
xpc_set_interface(xpc_initiate_connect, xpc_initiate_disconnect,
- xpc_initiate_allocate, xpc_initiate_send,
- xpc_initiate_send_notify, xpc_initiate_received,
- xpc_initiate_partid_to_nasids);
+ xpc_initiate_send, xpc_initiate_send_notify,
+ xpc_initiate_received, xpc_initiate_partid_to_nasids);
return 0;
+
+ /* initialization was not successful */
+out_3:
+ xpc_teardown_rsvd_page();
+
+ (void)unregister_die_notifier(&xpc_die_notifier);
+ (void)unregister_reboot_notifier(&xpc_reboot_notifier);
+out_2:
+ if (xpc_sysctl)
+ unregister_sysctl_table(xpc_sysctl);
+
+ xpc_teardown_partitions();
+out_1:
+ if (is_shub())
+ xpc_exit_sn2();
+ else
+ xpc_exit_uv();
+ return ret;
}
module_init(xpc_init);
MODULE_PARM_DESC(xpc_hb_check_interval, "Number of seconds between "
"heartbeat checks.");
-module_param(xpc_disengage_request_timelimit, int, 0);
-MODULE_PARM_DESC(xpc_disengage_request_timelimit, "Number of seconds to wait "
- "for disengage request to complete.");
+module_param(xpc_disengage_timelimit, int, 0);
+MODULE_PARM_DESC(xpc_disengage_timelimit, "Number of seconds to wait "
+ "for disengage to complete.");
module_param(xpc_kdebug_ignore, int, 0);
MODULE_PARM_DESC(xpc_kdebug_ignore, "Should lack of heartbeat be ignored by "
projects / linux-2.6-omap-h63xx.git / blobdiff