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Subject[Patch 5/6] sgi-xp: setup the activate GRU message queue
Setup the activate GRU message queue that is used for partition activation and
channel connection on UV systems.

Signed-off-by: Dean Nelson <dcn@sgi.com>

---

Note that the code to setup an irq on UV is incomplete, but is not an issue
since there aren't any UV systems at the moment. Code to resolve this will
be forthcoming.

drivers/misc/sgi-xp/xp.h | 3
drivers/misc/sgi-xp/xp_uv.c | 10
drivers/misc/sgi-xp/xpc.h | 158 +++++-
drivers/misc/sgi-xp/xpc_channel.c | 22
drivers/misc/sgi-xp/xpc_main.c | 329 ++++++++++---
drivers/misc/sgi-xp/xpc_partition.c | 28 -
drivers/misc/sgi-xp/xpc_sn2.c | 387 ++++++---------
drivers/misc/sgi-xp/xpc_uv.c | 781 ++++++++++++++++++++++++++++++--
8 files changed, 1328 insertions(+), 390 deletions(-)

Index: linux/drivers/misc/sgi-xp/xp_uv.c
===================================================================
--- linux.orig/drivers/misc/sgi-xp/xp_uv.c 2008-07-03 11:06:04.000000000 -0500
+++ linux/drivers/misc/sgi-xp/xp_uv.c 2008-07-03 11:06:20.000000000 -0500
@@ -42,15 +42,25 @@ xp_remote_memcpy_uv(unsigned long dst_gp
return xpGruCopyError;
}

+static int
+xp_cpu_to_nasid_uv(int cpuid)
+{
+ /* ??? Is this same as sn2 nasid in mach/part bitmaps set up by SAL? */
+ return UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpuid));
+}
+
enum xp_retval
xp_init_uv(void)
{
BUG_ON(!is_uv());

xp_max_npartitions = XP_MAX_NPARTITIONS_UV;
+ xp_partition_id = 0; /* !!! not correct value */
+ xp_region_size = 0; /* !!! not correct value */

xp_pa = xp_pa_uv;
xp_remote_memcpy = xp_remote_memcpy_uv;
+ xp_cpu_to_nasid = xp_cpu_to_nasid_uv;

return xpSuccess;
}
Index: linux/drivers/misc/sgi-xp/xpc_uv.c
===================================================================
--- linux.orig/drivers/misc/sgi-xp/xpc_uv.c 2008-07-03 11:06:04.000000000 -0500
+++ linux/drivers/misc/sgi-xp/xpc_uv.c 2008-07-03 11:15:20.000000000 -0500
@@ -14,41 +14,528 @@
*/

#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/device.h>
#include <asm/uv/uv_hub.h>
+#include "../sgi-gru/gru.h"
#include "../sgi-gru/grukservices.h"
#include "xpc.h"

+static atomic64_t xpc_heartbeat_uv;
static DECLARE_BITMAP(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV);

-static void *xpc_activate_mq;
+#define XPC_ACTIVATE_MSG_SIZE_UV (1 * GRU_CACHE_LINE_BYTES)
+#define XPC_NOTIFY_MSG_SIZE_UV (2 * GRU_CACHE_LINE_BYTES)
+
+#define XPC_ACTIVATE_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \
+ XPC_ACTIVATE_MSG_SIZE_UV)
+#define XPC_NOTIFY_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \
+ XPC_NOTIFY_MSG_SIZE_UV)
+
+static void *xpc_activate_mq_uv;
+static void *xpc_notify_mq_uv;
+
+static int
+xpc_setup_partitions_sn_uv(void)
+{
+ short partid;
+ struct xpc_partition_uv *part_uv;
+
+ for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
+ part_uv = &xpc_partitions[partid].sn.uv;
+
+ spin_lock_init(&part_uv->flags_lock);
+ part_uv->remote_act_state = XPC_P_AS_INACTIVE;
+ }
+ return 0;
+}
+
+static void *
+xpc_create_gru_mq_uv(unsigned int mq_size, int cpuid, unsigned int irq,
+ irq_handler_t irq_handler)
+{
+ int ret;
+ int nid;
+ int mq_order;
+ struct page *page;
+ void *mq;
+
+ nid = cpu_to_node(cpuid);
+ mq_order = get_order(mq_size);
+ page = alloc_pages_node(nid, GFP_KERNEL | __GFP_ZERO | GFP_THISNODE,
+ mq_order);
+ if (page == NULL)
+ return NULL;
+
+ mq = page_address(page);
+ ret = gru_create_message_queue(mq, mq_size);
+ if (ret != 0) {
+ dev_err(xpc_part, "gru_create_message_queue() returned "
+ "error=%d\n", ret);
+ free_pages((unsigned long)mq, mq_order);
+ return NULL;
+ }
+
+ /* !!! Need to do some other things to set up IRQ */
+
+ ret = request_irq(irq, irq_handler, 0, "xpc", NULL);
+ if (ret != 0) {
+ dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n",
+ irq, ret);
+ free_pages((unsigned long)mq, mq_order);
+ return NULL;
+ }
+
+ /* !!! enable generation of irq when GRU mq op occurs to this mq */
+
+ /* ??? allow other partitions to access GRU mq? */
+
+ return mq;
+}
+
+static void
+xpc_destroy_gru_mq_uv(void *mq, unsigned int mq_size, unsigned int irq)
+{
+ /* ??? disallow other partitions to access GRU mq? */
+
+ /* !!! disable generation of irq when GRU mq op occurs to this mq */
+
+ free_irq(irq, NULL);
+
+ free_pages((unsigned long)mq, get_order(mq_size));
+}
+
+static enum xp_retval
+xpc_send_gru_msg(unsigned long mq_gpa, void *msg, size_t msg_size)
+{
+ enum xp_retval xp_ret;
+ int ret;
+
+ while (1) {
+ ret = gru_send_message_gpa(mq_gpa, msg, msg_size);
+ if (ret == MQE_OK) {
+ xp_ret = xpSuccess;
+ break;
+ }
+
+ if (ret == MQE_QUEUE_FULL) {
+ dev_dbg(xpc_chan, "gru_send_message_gpa() returned "
+ "error=MQE_QUEUE_FULL\n");
+ /* !!! handle QLimit reached; delay & try again */
+ /* ??? Do we add a limit to the number of retries? */
+ (void)msleep_interruptible(10);
+ } else if (ret == MQE_CONGESTION) {
+ dev_dbg(xpc_chan, "gru_send_message_gpa() returned "
+ "error=MQE_CONGESTION\n");
+ /* !!! handle LB Overflow; simply try again */
+ /* ??? Do we add a limit to the number of retries? */
+ } else {
+ /* !!! Currently this is MQE_UNEXPECTED_CB_ERR */
+ dev_err(xpc_chan, "gru_send_message_gpa() returned "
+ "error=%d\n", ret);
+ xp_ret = xpGruSendMqError;
+ break;
+ }
+ }
+ return xp_ret;
+}
+
+static void
+xpc_process_activate_IRQ_rcvd_uv(void)
+{
+ unsigned long irq_flags;
+ short partid;
+ struct xpc_partition *part;
+ u8 act_state_req;
+
+ DBUG_ON(xpc_activate_IRQ_rcvd == 0);
+
+ spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+ for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
+ part = &xpc_partitions[partid];
+
+ if (part->sn.uv.act_state_req == 0)
+ continue;
+
+ xpc_activate_IRQ_rcvd--;
+ BUG_ON(xpc_activate_IRQ_rcvd < 0);
+
+ act_state_req = part->sn.uv.act_state_req;
+ part->sn.uv.act_state_req = 0;
+ spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+
+ if (act_state_req == XPC_P_ASR_ACTIVATE_UV) {
+ if (part->act_state == XPC_P_AS_INACTIVE)
+ xpc_activate_partition(part);
+ else if (part->act_state == XPC_P_AS_DEACTIVATING)
+ XPC_DEACTIVATE_PARTITION(part, xpReactivating);
+
+ } else if (act_state_req == XPC_P_ASR_REACTIVATE_UV) {
+ if (part->act_state == XPC_P_AS_INACTIVE)
+ xpc_activate_partition(part);
+ else
+ XPC_DEACTIVATE_PARTITION(part, xpReactivating);
+
+ } else if (act_state_req == XPC_P_ASR_DEACTIVATE_UV) {
+ XPC_DEACTIVATE_PARTITION(part, part->sn.uv.reason);
+
+ } else {
+ BUG();
+ }
+
+ spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+ if (xpc_activate_IRQ_rcvd == 0)
+ break;
+ }
+ spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+
+}
+
+static irqreturn_t
+xpc_handle_activate_IRQ_uv(int irq, void *dev_id)
+{
+ unsigned long irq_flags;
+ struct xpc_activate_mq_msghdr_uv *msg_hdr;
+ short partid;
+ struct xpc_partition *part;
+ struct xpc_partition_uv *part_uv;
+ struct xpc_openclose_args *args;
+ int wakeup_hb_checker = 0;
+
+ while ((msg_hdr = gru_get_next_message(xpc_activate_mq_uv)) != NULL) {
+
+ partid = msg_hdr->partid;
+ if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) {
+ dev_err(xpc_part, "xpc_handle_activate_IRQ_uv() invalid"
+ "partid=0x%x passed in message\n", partid);
+ gru_free_message(xpc_activate_mq_uv, msg_hdr);
+ continue;
+ }
+ part = &xpc_partitions[partid];
+ part_uv = &part->sn.uv;
+
+ 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_INC_HEARTBEAT_UV: {
+ struct xpc_activate_mq_msg_heartbeat_req_uv *msg;
+
+ msg = (struct xpc_activate_mq_msg_heartbeat_req_uv *)
+ msg_hdr;
+ part_uv->heartbeat = msg->heartbeat;
+ break;
+ }
+ case XPC_ACTIVATE_MQ_MSG_OFFLINE_HEARTBEAT_UV: {
+ struct xpc_activate_mq_msg_heartbeat_req_uv *msg;
+
+ msg = (struct xpc_activate_mq_msg_heartbeat_req_uv *)
+ msg_hdr;
+ part_uv->heartbeat = msg->heartbeat;
+ spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
+ part_uv->flags |= XPC_P_HEARTBEAT_OFFLINE_UV;
+ spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
+ break;
+ }
+ case XPC_ACTIVATE_MQ_MSG_ONLINE_HEARTBEAT_UV: {
+ struct xpc_activate_mq_msg_heartbeat_req_uv *msg;
+
+ msg = (struct xpc_activate_mq_msg_heartbeat_req_uv *)
+ msg_hdr;
+ part_uv->heartbeat = msg->heartbeat;
+ spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
+ part_uv->flags &= ~XPC_P_HEARTBEAT_OFFLINE_UV;
+ spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags);
+ 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 = (struct xpc_activate_mq_msg_activate_req_uv *)
+ msg_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->remote_activate_mq_gpa = msg->activate_mq_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 = (struct xpc_activate_mq_msg_deactivate_req_uv *)
+ msg_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++;
+ break;
+ }
+ case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: {
+ struct xpc_activate_mq_msg_chctl_closerequest_uv *msg;
+
+ msg = (struct xpc_activate_mq_msg_chctl_closerequest_uv
+ *)msg_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 = (struct xpc_activate_mq_msg_chctl_closereply_uv *)
+ msg_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 = (struct xpc_activate_mq_msg_chctl_openrequest_uv
+ *)msg_hdr;
+ args = &part->remote_openclose_args[msg->ch_number];
+ args->msg_size = msg->msg_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 = (struct xpc_activate_mq_msg_chctl_openreply_uv *)
+ msg_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->local_notify_mq_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_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,
+ partid);
+ }
+
+ 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++;
+ }
+
+ gru_free_message(xpc_activate_mq_uv, msg_hdr);
+ }
+
+ if (wakeup_hb_checker)
+ wake_up_interruptible(&xpc_activate_IRQ_wq);
+
+ return IRQ_HANDLED;
+}
+
+static enum xp_retval
+xpc_send_activate_IRQ_uv(struct xpc_partition *part, void *msg, size_t msg_size,
+ int msg_type)
+{
+ struct xpc_activate_mq_msghdr_uv *msg_hdr = msg;
+
+ DBUG_ON(msg_size > XPC_ACTIVATE_MSG_SIZE_UV);
+
+ msg_hdr->type = msg_type;
+ msg_hdr->partid = XPC_PARTID(part);
+ msg_hdr->act_state = part->act_state;
+ msg_hdr->rp_ts_jiffies = xpc_rsvd_page->ts_jiffies;
+
+ /* ??? Is holding a spin_lock (ch->lock) during this call a bad idea? */
+ return xpc_send_gru_msg(part->sn.uv.remote_activate_mq_gpa, msg,
+ msg_size);
+}

static void
-xpc_send_local_activate_IRQ_uv(struct xpc_partition *part)
+xpc_send_activate_IRQ_part_uv(struct xpc_partition *part, void *msg,
+ size_t msg_size, int msg_type)
{
+ enum xp_retval ret;
+
+ ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type);
+ if (unlikely(ret != xpSuccess))
+ XPC_DEACTIVATE_PARTITION(part, ret);
+}
+
+static void
+xpc_send_activate_IRQ_ch_uv(struct xpc_channel *ch, unsigned long *irq_flags,
+ void *msg, size_t msg_size, int msg_type)
+{
+ struct xpc_partition *part = &xpc_partitions[ch->number];
+ enum xp_retval ret;
+
+ ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type);
+ if (unlikely(ret != xpSuccess)) {
+ if (irq_flags != NULL)
+ spin_unlock_irqrestore(&ch->lock, *irq_flags);
+
+ XPC_DEACTIVATE_PARTITION(part, ret);
+
+ if (irq_flags != NULL)
+ spin_lock_irqsave(&ch->lock, *irq_flags);
+ }
+}
+
+static void
+xpc_send_local_activate_IRQ_uv(struct xpc_partition *part, int act_state_req)
+{
+ unsigned long irq_flags;
+ struct xpc_partition_uv *part_uv = &part->sn.uv;
+
/*
* !!! Make our side think that the remote parition sent an activate
- * !!! message our way. Also do what the activate IRQ handler would
+ * !!! message our way by doing what the activate IRQ handler would
* !!! do had one really been sent.
*/
+
+ 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 = act_state_req;
+ spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+
+ wake_up_interruptible(&xpc_activate_IRQ_wq);
}

static enum xp_retval
-xpc_rsvd_page_init_uv(struct xpc_rsvd_page *rp)
+xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa,
+ size_t *len)
{
- /* !!! need to have established xpc_activate_mq earlier */
- rp->sn.activate_mq_gpa = uv_gpa(xpc_activate_mq);
- return xpSuccess;
+ /* !!! call the UV version of sn_partition_reserved_page_pa() */
+ return xpUnsupported;
+}
+
+static int
+xpc_setup_rsvd_page_sn_uv(struct xpc_rsvd_page *rp)
+{
+ rp->sn.activate_mq_gpa = uv_gpa(xpc_activate_mq_uv);
+ return 0;
+}
+
+static void
+xpc_send_heartbeat_uv(int msg_type)
+{
+ short partid;
+ struct xpc_partition *part;
+ struct xpc_activate_mq_msg_heartbeat_req_uv msg;
+
+ /*
+ * !!! On uv we're broadcasting a heartbeat message every 5 seconds.
+ * !!! Whereas on sn2 we're bte_copy'ng the heartbeat info every 20
+ * !!! seconds. This is an increase in numalink traffic.
+ * ??? Is this good?
+ */
+
+ msg.heartbeat = atomic64_inc_return(&xpc_heartbeat_uv);
+
+ partid = find_first_bit(xpc_heartbeating_to_mask_uv,
+ XP_MAX_NPARTITIONS_UV);
+
+ while (partid < XP_MAX_NPARTITIONS_UV) {
+ part = &xpc_partitions[partid];
+
+ xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
+ msg_type);
+
+ partid = find_next_bit(xpc_heartbeating_to_mask_uv,
+ XP_MAX_NPARTITIONS_UV, partid + 1);
+ }
}

static void
xpc_increment_heartbeat_uv(void)
{
- /* !!! send heartbeat msg to xpc_heartbeating_to_mask partids */
+ xpc_send_heartbeat_uv(XPC_ACTIVATE_MQ_MSG_INC_HEARTBEAT_UV);
+}
+
+static void
+xpc_offline_heartbeat_uv(void)
+{
+ xpc_send_heartbeat_uv(XPC_ACTIVATE_MQ_MSG_OFFLINE_HEARTBEAT_UV);
+}
+
+static void
+xpc_online_heartbeat_uv(void)
+{
+ xpc_send_heartbeat_uv(XPC_ACTIVATE_MQ_MSG_ONLINE_HEARTBEAT_UV);
}

static void
xpc_heartbeat_init_uv(void)
{
+ atomic64_set(&xpc_heartbeat_uv, 0);
bitmap_zero(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV);
xpc_heartbeating_to_mask = &xpc_heartbeating_to_mask_uv[0];
}
@@ -56,48 +543,94 @@ xpc_heartbeat_init_uv(void)
static void
xpc_heartbeat_exit_uv(void)
{
- /* !!! send heartbeat_offline msg to xpc_heartbeating_to_mask partids */
+ xpc_send_heartbeat_uv(XPC_ACTIVATE_MQ_MSG_OFFLINE_HEARTBEAT_UV);
+}
+
+static enum xp_retval
+xpc_get_remote_heartbeat_uv(struct xpc_partition *part)
+{
+ struct xpc_partition_uv *part_uv = &part->sn.uv;
+ enum xp_retval ret = xpNoHeartbeat;
+
+ if (part_uv->remote_act_state != XPC_P_AS_INACTIVE &&
+ part_uv->remote_act_state != XPC_P_AS_DEACTIVATING) {
+
+ if (part_uv->heartbeat != part->last_heartbeat ||
+ (part_uv->flags & XPC_P_HEARTBEAT_OFFLINE_UV)) {
+
+ part->last_heartbeat = part_uv->heartbeat;
+ ret = xpSuccess;
+ }
+ }
+ return ret;
}

static void
xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp,
- unsigned long remote_rp_pa, int nasid)
+ unsigned long remote_rp_gpa, int nasid)
{
short partid = remote_rp->SAL_partid;
struct xpc_partition *part = &xpc_partitions[partid];
+ struct xpc_activate_mq_msg_activate_req_uv msg;

-/*
- * !!! Setup part structure with the bits of info we can glean from the rp:
- * !!! part->remote_rp_pa = remote_rp_pa;
- * !!! part->sn.uv.activate_mq_gpa = remote_rp->sn.activate_mq_gpa;
- */
+ part->remote_rp_pa = remote_rp_gpa; /* !!! _pa here is really _gpa */
+ part->remote_rp_ts_jiffies = remote_rp->ts_jiffies;
+ part->sn.uv.remote_activate_mq_gpa = remote_rp->sn.activate_mq_gpa;
+
+ /*
+ * ??? Is it a good idea to make this conditional on what is
+ * ??? potentially stale state information?
+ */
+ if (part->sn.uv.remote_act_state == XPC_P_AS_INACTIVE) {
+ msg.rp_gpa = uv_gpa(xpc_rsvd_page);
+ msg.activate_mq_gpa = xpc_rsvd_page->sn.activate_mq_gpa;
+ xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
+ XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV);
+ }

- xpc_send_local_activate_IRQ_uv(part);
+ if (part->act_state == XPC_P_AS_INACTIVE)
+ xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV);
}

static void
xpc_request_partition_reactivation_uv(struct xpc_partition *part)
{
- xpc_send_local_activate_IRQ_uv(part);
+ xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV);
+}
+
+static void
+xpc_request_partition_deactivation_uv(struct xpc_partition *part)
+{
+ struct xpc_activate_mq_msg_deactivate_req_uv msg;
+
+ /*
+ * ??? Is it a good idea to make this conditional on what is
+ * ??? potentially stale state information?
+ */
+ if (part->sn.uv.remote_act_state != XPC_P_AS_DEACTIVATING &&
+ part->sn.uv.remote_act_state != XPC_P_AS_INACTIVE) {
+
+ msg.reason = part->reason;
+ xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
+ XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV);
+ }
}

/*
- * Setup the infrastructure necessary to support XPartition Communication
- * between the specified remote partition and the local one.
+ * Setup the channel structures that are uv specific.
*/
static enum xp_retval
-xpc_setup_infrastructure_uv(struct xpc_partition *part)
+xpc_setup_ch_structures_sn_uv(struct xpc_partition *part)
{
/* !!! this function needs fleshing out */
return xpUnsupported;
}

/*
- * Teardown the infrastructure necessary to support XPartition Communication
- * between the specified remote partition and the local one.
+ * Teardown the channel structures that are uv specific.
*/
static void
-xpc_teardown_infrastructure_uv(struct xpc_partition *part)
+xpc_teardown_ch_structures_sn_uv(struct xpc_partition *part)
{
/* !!! this function needs fleshing out */
return;
@@ -106,15 +639,163 @@ xpc_teardown_infrastructure_uv(struct xp
static enum xp_retval
xpc_make_first_contact_uv(struct xpc_partition *part)
{
- /* !!! this function needs fleshing out */
- return xpUnsupported;
+ struct xpc_activate_mq_msg_uv msg;
+
+ /*
+ * We send a sync msg to get the remote partition's remote_act_state
+ * updated to our current act_state which at this point should
+ * be XPC_P_AS_ACTIVATING.
+ */
+ xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
+ XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV);
+
+ while (part->sn.uv.remote_act_state != XPC_P_AS_ACTIVATING) {
+
+ dev_dbg(xpc_part, "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_AS_DEACTIVATING)
+ return part->reason;
+ }
+
+ return xpSuccess;
}

static u64
xpc_get_chctl_all_flags_uv(struct xpc_partition *part)
{
+ unsigned long irq_flags;
+ union xpc_channel_ctl_flags chctl;
+
+ spin_lock_irqsave(&part->chctl_lock, irq_flags);
+ chctl = part->chctl;
+ if (chctl.all_flags != 0)
+ part->chctl.all_flags = 0;
+
+ spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
+ return chctl.all_flags;
+}
+
+static enum xp_retval
+xpc_setup_msg_structures_uv(struct xpc_channel *ch)
+{
/* !!! this function needs fleshing out */
- return 0UL;
+ return xpUnsupported;
+}
+
+static void
+xpc_teardown_msg_structures_uv(struct xpc_channel *ch)
+{
+ struct xpc_channel_uv *ch_uv = &ch->sn.uv;
+
+ ch_uv->remote_notify_mq_gpa = 0;
+
+ /* !!! this function needs fleshing out */
+}
+
+static void
+xpc_send_chctl_closerequest_uv(struct xpc_channel *ch, unsigned long *irq_flags)
+{
+ struct xpc_activate_mq_msg_chctl_closerequest_uv msg;
+
+ msg.ch_number = ch->number;
+ msg.reason = ch->reason;
+ xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
+ XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV);
+}
+
+static void
+xpc_send_chctl_closereply_uv(struct xpc_channel *ch, unsigned long *irq_flags)
+{
+ struct xpc_activate_mq_msg_chctl_closereply_uv msg;
+
+ msg.ch_number = ch->number;
+ xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
+ XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV);
+}
+
+static void
+xpc_send_chctl_openrequest_uv(struct xpc_channel *ch, unsigned long *irq_flags)
+{
+ struct xpc_activate_mq_msg_chctl_openrequest_uv msg;
+
+ msg.ch_number = ch->number;
+ msg.msg_size = ch->msg_size;
+ msg.local_nentries = ch->local_nentries;
+ xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
+ XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV);
+}
+
+static void
+xpc_send_chctl_openreply_uv(struct xpc_channel *ch, unsigned long *irq_flags)
+{
+ struct xpc_activate_mq_msg_chctl_openreply_uv msg;
+
+ msg.ch_number = ch->number;
+ msg.local_nentries = ch->local_nentries;
+ msg.remote_nentries = ch->remote_nentries;
+ msg.local_notify_mq_gpa = uv_gpa(xpc_notify_mq_uv);
+ xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg),
+ XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV);
+}
+
+static void
+xpc_save_remote_msgqueue_pa_uv(struct xpc_channel *ch,
+ unsigned long msgqueue_pa)
+{
+ ch->sn.uv.remote_notify_mq_gpa = msgqueue_pa;
+}
+
+static void
+xpc_indicate_partition_engaged_uv(struct xpc_partition *part)
+{
+ struct xpc_activate_mq_msg_uv msg;
+
+ xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
+ XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV);
+}
+
+static void
+xpc_indicate_partition_disengaged_uv(struct xpc_partition *part)
+{
+ struct xpc_activate_mq_msg_uv msg;
+
+ xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg),
+ XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV);
+}
+
+static void
+xpc_assume_partition_disengaged_uv(short partid)
+{
+ struct xpc_partition_uv *part_uv = &xpc_partitions[partid].sn.uv;
+ unsigned long irq_flags;
+
+ 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);
+}
+
+static int
+xpc_partition_engaged_uv(short partid)
+{
+ return (xpc_partitions[partid].sn.uv.flags & XPC_P_ENGAGED_UV) != 0;
+}
+
+static int
+xpc_any_partition_engaged_uv(void)
+{
+ struct xpc_partition_uv *part_uv;
+ short partid;
+
+ for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) {
+ part_uv = &xpc_partitions[partid].sn.uv;
+ if ((part_uv->flags & XPC_P_ENGAGED_UV) != 0)
+ return 1;
+ }
+ return 0;
}

static struct xpc_msg *
@@ -124,24 +805,64 @@ xpc_get_deliverable_msg_uv(struct xpc_ch
return NULL;
}

-void
+int
xpc_init_uv(void)
{
- xpc_rsvd_page_init = xpc_rsvd_page_init_uv;
+ xpc_setup_partitions_sn = xpc_setup_partitions_sn_uv;
+ xpc_process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_uv;
+ xpc_get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_uv;
+ xpc_setup_rsvd_page_sn = xpc_setup_rsvd_page_sn_uv;
xpc_increment_heartbeat = xpc_increment_heartbeat_uv;
+ xpc_offline_heartbeat = xpc_offline_heartbeat_uv;
+ xpc_online_heartbeat = xpc_online_heartbeat_uv;
xpc_heartbeat_init = xpc_heartbeat_init_uv;
xpc_heartbeat_exit = xpc_heartbeat_exit_uv;
+ xpc_get_remote_heartbeat = xpc_get_remote_heartbeat_uv;
+
xpc_request_partition_activation = xpc_request_partition_activation_uv;
xpc_request_partition_reactivation =
xpc_request_partition_reactivation_uv;
- xpc_setup_infrastructure = xpc_setup_infrastructure_uv;
- xpc_teardown_infrastructure = xpc_teardown_infrastructure_uv;
+ xpc_request_partition_deactivation =
+ xpc_request_partition_deactivation_uv;
+
+ xpc_setup_ch_structures_sn = xpc_setup_ch_structures_sn_uv;
+ xpc_teardown_ch_structures_sn = xpc_teardown_ch_structures_sn_uv;
+
xpc_make_first_contact = xpc_make_first_contact_uv;
+
xpc_get_chctl_all_flags = xpc_get_chctl_all_flags_uv;
+ xpc_send_chctl_closerequest = xpc_send_chctl_closerequest_uv;
+ xpc_send_chctl_closereply = xpc_send_chctl_closereply_uv;
+ xpc_send_chctl_openrequest = xpc_send_chctl_openrequest_uv;
+ xpc_send_chctl_openreply = xpc_send_chctl_openreply_uv;
+
+ xpc_save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_uv;
+
+ xpc_setup_msg_structures = xpc_setup_msg_structures_uv;
+ xpc_teardown_msg_structures = xpc_teardown_msg_structures_uv;
+
+ xpc_indicate_partition_engaged = xpc_indicate_partition_engaged_uv;
+ xpc_indicate_partition_disengaged =
+ xpc_indicate_partition_disengaged_uv;
+ xpc_assume_partition_disengaged = xpc_assume_partition_disengaged_uv;
+ xpc_partition_engaged = xpc_partition_engaged_uv;
+ xpc_any_partition_engaged = xpc_any_partition_engaged_uv;
+
xpc_get_deliverable_msg = xpc_get_deliverable_msg_uv;
+
+ /* ??? The cpuid argument's value is 0, is that what we want? */
+ /* !!! The irq argument's value isn't correct. */
+ xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, 0, 0,
+ xpc_handle_activate_IRQ_uv);
+ if (xpc_activate_mq_uv == NULL)
+ return -ENOMEM;
+
+ return 0;
}

void
xpc_exit_uv(void)
{
+ /* !!! The irq argument's value isn't correct. */
+ xpc_destroy_gru_mq_uv(xpc_activate_mq_uv, XPC_ACTIVATE_MQ_SIZE_UV, 0);
}
Index: linux/drivers/misc/sgi-xp/xpc.h
===================================================================
--- linux.orig/drivers/misc/sgi-xp/xpc.h 2008-07-03 11:06:04.000000000 -0500
+++ linux/drivers/misc/sgi-xp/xpc.h 2008-07-03 11:09:18.000000000 -0500
@@ -164,8 +164,8 @@ struct xpc_vars_part_sn2 {
* MAGIC2 indicates that this partition has pulled the remote partititions
* per partition variables that pertain to this partition.
*/
-#define XPC_VP_MAGIC1 0x0053524156435058L /* 'XPCVARS\0'L (little endian) */
-#define XPC_VP_MAGIC2 0x0073726176435058L /* 'XPCvars\0'L (little endian) */
+#define XPC_VP_MAGIC1_SN2 0x0053524156435058L /* 'XPCVARS\0'L (little endian) */
+#define XPC_VP_MAGIC2_SN2 0x0073726176435058L /* 'XPCvars\0'L (little endian) */

/* the reserved page sizes and offsets */

@@ -181,6 +181,80 @@ struct xpc_vars_part_sn2 {
xpc_nasid_mask_nlongs))

/*
+ * The activate_mq is used to send/receive messages that affect XPC's heartbeat,
+ * partition active state, and channel state. This is UV only.
+ */
+struct xpc_activate_mq_msghdr_uv {
+ short partid; /* sender's partid */
+ u8 act_state; /* sender's act_state at time msg sent */
+ u8 type; /* message's type */
+ unsigned long rp_ts_jiffies; /* timestamp of sender's rp setup by XPC */
+};
+
+/* activate_mq defined message types */
+#define XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV 0
+#define XPC_ACTIVATE_MQ_MSG_INC_HEARTBEAT_UV 1
+#define XPC_ACTIVATE_MQ_MSG_OFFLINE_HEARTBEAT_UV 2
+#define XPC_ACTIVATE_MQ_MSG_ONLINE_HEARTBEAT_UV 3
+
+#define XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV 4
+#define XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV 5
+
+#define XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV 6
+#define XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV 7
+#define XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV 8
+#define XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV 9
+
+#define XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV 10
+#define XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV 11
+
+struct xpc_activate_mq_msg_uv {
+ struct xpc_activate_mq_msghdr_uv header;
+};
+
+struct xpc_activate_mq_msg_heartbeat_req_uv {
+ struct xpc_activate_mq_msghdr_uv header;
+ u64 heartbeat;
+};
+
+struct xpc_activate_mq_msg_activate_req_uv {
+ struct xpc_activate_mq_msghdr_uv header;
+ unsigned long rp_gpa;
+ unsigned long activate_mq_gpa;
+};
+
+struct xpc_activate_mq_msg_deactivate_req_uv {
+ struct xpc_activate_mq_msghdr_uv header;
+ enum xp_retval reason;
+};
+
+struct xpc_activate_mq_msg_chctl_closerequest_uv {
+ struct xpc_activate_mq_msghdr_uv header;
+ short ch_number;
+ enum xp_retval reason;
+};
+
+struct xpc_activate_mq_msg_chctl_closereply_uv {
+ struct xpc_activate_mq_msghdr_uv header;
+ short ch_number;
+};
+
+struct xpc_activate_mq_msg_chctl_openrequest_uv {
+ struct xpc_activate_mq_msghdr_uv header;
+ short ch_number;
+ short msg_size; /* size of notify_mq's messages */
+ short local_nentries; /* ??? Is this needed? What is? */
+};
+
+struct xpc_activate_mq_msg_chctl_openreply_uv {
+ struct xpc_activate_mq_msghdr_uv header;
+ short ch_number;
+ short remote_nentries; /* ??? Is this needed? What is? */
+ short local_nentries; /* ??? Is this needed? What is? */
+ unsigned long local_notify_mq_gpa;
+};
+
+/*
* Functions registered by add_timer() or called by kernel_thread() only
* allow for a single 64-bit argument. The following macros can be used to
* pack and unpack two (32-bit, 16-bit or 8-bit) arguments into or out from
@@ -331,6 +405,18 @@ struct xpc_notify {
*/

struct xpc_channel_sn2 {
+ struct xpc_openclose_args *local_openclose_args; /* args passed on */
+ /* opening or closing of channel */
+
+ void *local_msgqueue_base; /* base address of kmalloc'd space */
+ struct xpc_msg *local_msgqueue; /* local message queue */
+ void *remote_msgqueue_base; /* base address of kmalloc'd space */
+ struct xpc_msg *remote_msgqueue; /* cached copy of remote partition's */
+ /* local message queue */
+ unsigned long remote_msgqueue_pa; /* phys addr of remote partition's */
+ /* local message queue */
+
+ struct xpc_notify *notify_queue; /* notify queue for messages sent */

/* various flavors of local and remote Get/Put values */

@@ -344,13 +430,14 @@ struct xpc_channel_sn2 {
};

struct xpc_channel_uv {
- /* !!! code is coming */
+ unsigned long remote_notify_mq_gpa; /* gru phys address of remote */
+ /* partition's notify mq */
};

struct xpc_channel {
short partid; /* ID of remote partition connected */
spinlock_t lock; /* lock for updating this structure */
- u32 flags; /* general flags */
+ unsigned int flags; /* general flags */

enum xp_retval reason; /* reason why channel is disconnect'g */
int reason_line; /* line# disconnect initiated from */
@@ -361,14 +448,6 @@ struct xpc_channel {
u16 local_nentries; /* #of msg entries in local msg queue */
u16 remote_nentries; /* #of msg entries in remote msg queue */

- void *local_msgqueue_base; /* base address of kmalloc'd space */
- struct xpc_msg *local_msgqueue; /* local message queue */
- void *remote_msgqueue_base; /* base address of kmalloc'd space */
- struct xpc_msg *remote_msgqueue; /* cached copy of remote partition's */
- /* local message queue */
- unsigned long remote_msgqueue_pa; /* phys addr of remote partition's */
- /* local message queue */
-
atomic_t references; /* #of external references to queues */

atomic_t n_on_msg_allocate_wq; /* #on msg allocation wait queue */
@@ -377,19 +456,13 @@ struct xpc_channel {
u8 delayed_chctl_flags; /* chctl flags received, but delayed */
/* action until channel disconnected */

- /* queue of msg senders who want to be notified when msg received */
-
atomic_t n_to_notify; /* #of msg senders to notify */
- struct xpc_notify *notify_queue; /* notify queue for messages sent */

xpc_channel_func func; /* user's channel function */
void *key; /* pointer to user's key */

struct completion wdisconnect_wait; /* wait for channel disconnect */

- struct xpc_openclose_args *local_openclose_args; /* args passed on */
- /* opening or closing of channel */
-
/* kthread management related fields */

atomic_t kthreads_assigned; /* #of kthreads assigned to channel */
@@ -507,6 +580,8 @@ struct xpc_partition_sn2 {
unsigned long remote_GPs_pa; /* phys addr of remote partition's local */
/* Get/Put values */

+ void *local_openclose_args_base; /* base address of kmalloc'd space */
+ struct xpc_openclose_args *local_openclose_args; /* local's args */
unsigned long remote_openclose_args_pa; /* phys addr of remote's args */

int notify_IRQ_nasid; /* nasid of where to send notify IRQs */
@@ -520,9 +595,27 @@ struct xpc_partition_sn2 {
};

struct xpc_partition_uv {
- /* !!! code is coming */
+ unsigned long remote_activate_mq_gpa; /* gru phys address of remote */
+ /* partition's activate mq */
+ spinlock_t flags_lock; /* protect updating of flags */
+ unsigned int flags; /* general flags */
+ u8 remote_act_state; /* remote partition's act_state */
+ u8 act_state_req; /* act_state request from remote partition */
+ enum xp_retval reason; /* reason for deactivate act_state request */
+ u64 heartbeat; /* incremented by remote partition */
};

+/* struct xpc_partition_uv flags */
+
+#define XPC_P_HEARTBEAT_OFFLINE_UV 0x00000001
+#define XPC_P_ENGAGED_UV 0x00000002
+
+/* struct xpc_partition_uv act_state change requests */
+
+#define XPC_P_ASR_ACTIVATE_UV 0x01
+#define XPC_P_ASR_REACTIVATE_UV 0x02
+#define XPC_P_ASR_DEACTIVATE_UV 0x03
+
struct xpc_partition {

/* XPC HB infrastructure */
@@ -556,8 +649,6 @@ struct xpc_partition {
union xpc_channel_ctl_flags chctl; /* chctl flags yet to be processed */
spinlock_t chctl_lock; /* chctl flags lock */

- void *local_openclose_args_base; /* base address of kmalloc'd space */
- struct xpc_openclose_args *local_openclose_args; /* local's args */
void *remote_openclose_args_base; /* base address of kmalloc'd space */
struct xpc_openclose_args *remote_openclose_args; /* copy of remote's */
/* args */
@@ -616,17 +707,20 @@ extern struct device *xpc_part;
extern struct device *xpc_chan;
extern int xpc_disengage_timelimit;
extern int xpc_disengage_timedout;
-extern atomic_t xpc_activate_IRQ_rcvd;
+extern int xpc_activate_IRQ_rcvd;
+extern spinlock_t xpc_activate_IRQ_rcvd_lock;
extern wait_queue_head_t xpc_activate_IRQ_wq;
extern void *xpc_heartbeating_to_mask;
+extern void *xpc_kzalloc_cacheline_aligned(size_t, gfp_t, void **);
extern void xpc_activate_partition(struct xpc_partition *);
extern void xpc_activate_kthreads(struct xpc_channel *, int);
extern void xpc_create_kthreads(struct xpc_channel *, int, int);
extern void xpc_disconnect_wait(int);
+extern int (*xpc_setup_partitions_sn) (void);
extern enum xp_retval (*xpc_get_partition_rsvd_page_pa) (void *, u64 *,
unsigned long *,
size_t *);
-extern enum xp_retval (*xpc_rsvd_page_init) (struct xpc_rsvd_page *);
+extern int (*xpc_setup_rsvd_page_sn) (struct xpc_rsvd_page *);
extern void (*xpc_heartbeat_init) (void);
extern void (*xpc_heartbeat_exit) (void);
extern void (*xpc_increment_heartbeat) (void);
@@ -635,8 +729,8 @@ extern void (*xpc_online_heartbeat) (voi
extern enum xp_retval (*xpc_get_remote_heartbeat) (struct xpc_partition *);
extern enum xp_retval (*xpc_make_first_contact) (struct xpc_partition *);
extern u64 (*xpc_get_chctl_all_flags) (struct xpc_partition *);
-extern enum xp_retval (*xpc_allocate_msgqueues) (struct xpc_channel *);
-extern void (*xpc_free_msgqueues) (struct xpc_channel *);
+extern enum xp_retval (*xpc_setup_msg_structures) (struct xpc_channel *);
+extern void (*xpc_teardown_msg_structures) (struct xpc_channel *);
extern void (*xpc_notify_senders_of_disconnect) (struct xpc_channel *);
extern void (*xpc_process_msg_chctl_flags) (struct xpc_partition *, int);
extern int (*xpc_n_of_deliverable_msgs) (struct xpc_channel *);
@@ -647,9 +741,9 @@ extern void (*xpc_request_partition_reac
extern void (*xpc_request_partition_deactivation) (struct xpc_partition *);
extern void (*xpc_cancel_partition_deactivation_request) (
struct xpc_partition *);
-extern void (*xpc_process_activate_IRQ_rcvd) (int);
-extern enum xp_retval (*xpc_setup_infrastructure) (struct xpc_partition *);
-extern void (*xpc_teardown_infrastructure) (struct xpc_partition *);
+extern void (*xpc_process_activate_IRQ_rcvd) (void);
+extern enum xp_retval (*xpc_setup_ch_structures_sn) (struct xpc_partition *);
+extern void (*xpc_teardown_ch_structures_sn) (struct xpc_partition *);

extern void (*xpc_indicate_partition_engaged) (struct xpc_partition *);
extern int (*xpc_partition_engaged) (short);
@@ -665,6 +759,9 @@ extern void (*xpc_send_chctl_openrequest
unsigned long *);
extern void (*xpc_send_chctl_openreply) (struct xpc_channel *, unsigned long *);

+extern void (*xpc_save_remote_msgqueue_pa) (struct xpc_channel *,
+ unsigned long);
+
extern enum xp_retval (*xpc_send_msg) (struct xpc_channel *, u32, void *, u16,
u8, xpc_notify_func, void *);
extern void (*xpc_received_msg) (struct xpc_channel *, struct xpc_msg *);
@@ -674,7 +771,7 @@ extern int xpc_init_sn2(void);
extern void xpc_exit_sn2(void);

/* found in xpc_uv.c */
-extern void xpc_init_uv(void);
+extern int xpc_init_uv(void);
extern void xpc_exit_uv(void);

/* found in xpc_partition.c */
@@ -684,7 +781,8 @@ extern struct xpc_rsvd_page *xpc_rsvd_pa
extern unsigned long *xpc_mach_nasids;
extern struct xpc_partition *xpc_partitions;
extern void *xpc_kmalloc_cacheline_aligned(size_t, gfp_t, void **);
-extern struct xpc_rsvd_page *xpc_setup_rsvd_page(void);
+extern int xpc_setup_rsvd_page(void);
+extern void xpc_teardown_rsvd_page(void);
extern int xpc_identify_activate_IRQ_sender(void);
extern int xpc_partition_disengaged(struct xpc_partition *);
extern enum xp_retval xpc_mark_partition_active(struct xpc_partition *);
Index: linux/drivers/misc/sgi-xp/xpc_main.c
===================================================================
--- linux.orig/drivers/misc/sgi-xp/xpc_main.c 2008-07-03 11:06:04.000000000 -0500
+++ linux/drivers/misc/sgi-xp/xpc_main.c 2008-07-03 11:09:27.000000000 -0500
@@ -141,8 +141,9 @@ static struct ctl_table_header *xpc_sysc
/* non-zero if any remote partition disengage was timed out */
int xpc_disengage_timedout;

-/* #of activate IRQs received */
-atomic_t xpc_activate_IRQ_rcvd = ATOMIC_INIT(0);
+/* #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 */
DECLARE_WAIT_QUEUE_HEAD(xpc_activate_IRQ_wq);
@@ -169,10 +170,11 @@ static struct notifier_block xpc_die_not
.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);
-enum xp_retval (*xpc_rsvd_page_init) (struct xpc_rsvd_page *rp);
+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);
@@ -183,8 +185,8 @@ enum xp_retval (*xpc_get_remote_heartbea
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_allocate_msgqueues) (struct xpc_channel *ch);
-void (*xpc_free_msgqueues) (struct xpc_channel *ch);
+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_msgs) (struct xpc_channel *ch);
struct xpc_msg *(*xpc_get_deliverable_msg) (struct xpc_channel *ch);
@@ -196,9 +198,9 @@ void (*xpc_request_partition_reactivatio
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) (int n_IRQs_expected);
-enum xp_retval (*xpc_setup_infrastructure) (struct xpc_partition *part);
-void (*xpc_teardown_infrastructure) (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);
@@ -215,6 +217,9 @@ void (*xpc_send_chctl_openrequest) (stru
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_msg) (struct xpc_channel *ch, u32 flags,
void *payload, u16 payload_size, u8 notify_type,
xpc_notify_func func, void *key);
@@ -308,8 +313,6 @@ xpc_check_remote_hb(void)
static int
xpc_hb_checker(void *ignore)
{
- int last_IRQ_count = 0;
- int new_IRQ_count;
int force_IRQ = 0;

/* this thread was marked active by xpc_hb_init() */
@@ -325,43 +328,37 @@ xpc_hb_checker(void *ignore)
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_activate_IRQ_rcvd) - last_IRQ_count);
+ xpc_activate_IRQ_rcvd);

/* checking of remote heartbeats is skewed by IRQ handling */
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
- * IRQ/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_activate_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");
-
- xpc_process_activate_IRQ_rcvd(new_IRQ_count -
- last_IRQ_count);
- 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_activate_IRQ_wq,
- (last_IRQ_count < atomic_read(
- &xpc_activate_IRQ_rcvd)
- || time_is_before_eq_jiffies(
+ (time_is_before_eq_jiffies(
xpc_hb_check_timeout) ||
+ xpc_activate_IRQ_rcvd > 0 ||
xpc_exiting));
}

@@ -437,6 +434,153 @@ xpc_channel_mgr(struct xpc_partition *pa
}

/*
+ * Guarantee that the kzalloc'd memory is cacheline aligned.
+ */
+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;
+ }
+
+ /* allocate the remote open and close args */
+
+ 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);
+
+ /*
+ * 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;
+
+ wait_event(part->teardown_wq, (atomic_read(&part->references) == 0));
+
+ /* now we can begin tearing down the infrastructure */
+
+ xpc_teardown_ch_structures_sn(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
@@ -476,7 +620,7 @@ xpc_activating(void *__partid)

xpc_allow_hb(partid);

- if (xpc_setup_infrastructure(part) == xpSuccess) {
+ if (xpc_setup_ch_structures(part) == xpSuccess) {
(void)xpc_part_ref(part); /* this will always succeed */

if (xpc_make_first_contact(part) == xpSuccess) {
@@ -486,7 +630,7 @@ xpc_activating(void *__partid)
}

xpc_part_deref(part);
- xpc_teardown_infrastructure(part);
+ xpc_teardown_ch_structures(part);
}

xpc_disallow_hb(partid);
@@ -806,6 +950,56 @@ xpc_disconnect_wait(int ch_number)
}
}

+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)
{
@@ -892,8 +1086,7 @@ xpc_do_exit(enum xp_retval reason)
DBUG_ON(xpc_any_partition_engaged());
DBUG_ON(xpc_any_hbs_allowed() != 0);

- /* a zero timestamp indicates our rsvd page is not initialized */
- xpc_rsvd_page->ts_jiffies = 0;
+ xpc_teardown_rsvd_page();

if (reason == xpUnloading) {
(void)unregister_die_notifier(&xpc_die_notifier);
@@ -906,7 +1099,7 @@ xpc_do_exit(enum xp_retval reason)
if (xpc_sysctl)
unregister_sysctl_table(xpc_sysctl);

- kfree(xpc_partitions);
+ xpc_teardown_partitions();

if (is_shub())
xpc_exit_sn2();
@@ -1062,8 +1255,6 @@ int __init
xpc_init(void)
{
int ret;
- short partid;
- struct xpc_partition *part;
struct task_struct *kthread;

snprintf(xpc_part->bus_id, BUS_ID_SIZE, "part");
@@ -1076,56 +1267,29 @@ xpc_init(void)
* further to only support exactly 64 partitions on this
* architecture, no less.
*/
- if (xp_max_npartitions != 64)
- return -EINVAL;
-
- ret = xpc_init_sn2();
- if (ret != 0)
- return ret;
+ if (xp_max_npartitions != 64) {
+ dev_err(xpc_part, "max #of partitions not set to 64\n");
+ ret = -EINVAL;
+ } else {
+ ret = xpc_init_sn2();
+ }

} else if (is_uv()) {
- xpc_init_uv();
+ ret = xpc_init_uv();

} else {
- return -ENODEV;
+ ret = -ENODEV;
}

- xpc_partitions = kzalloc(sizeof(struct xpc_partition) *
- xp_max_npartitions, GFP_KERNEL);
- if (xpc_partitions == NULL) {
+ if (ret != 0)
+ return ret;
+
+ ret = xpc_setup_partitions();
+ if (ret != 0) {
dev_err(xpc_part, "can't get memory for partition structure\n");
- ret = -ENOMEM;
goto out_1;
}

- /*
- * 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);
- }
-
xpc_sysctl = register_sysctl_table(xpc_sys_dir);

/*
@@ -1133,10 +1297,9 @@ xpc_init(void)
* other partitions to discover we are alive and establish initial
* communications.
*/
- xpc_rsvd_page = xpc_setup_rsvd_page();
- if (xpc_rsvd_page == NULL) {
+ ret = xpc_setup_rsvd_page();
+ if (ret != 0) {
dev_err(xpc_part, "can't setup our reserved page\n");
- ret = -EBUSY;
goto out_2;
}

@@ -1187,15 +1350,15 @@ xpc_init(void)

/* initialization was not successful */
out_3:
- /* a zero timestamp indicates our rsvd page is not initialized */
- xpc_rsvd_page->ts_jiffies = 0;
+ 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);
- kfree(xpc_partitions);
+
+ xpc_teardown_partitions();
out_1:
if (is_shub())
xpc_exit_sn2();
Index: linux/drivers/misc/sgi-xp/xpc_partition.c
===================================================================
--- linux.orig/drivers/misc/sgi-xp/xpc_partition.c 2008-07-03 11:06:04.000000000 -0500
+++ linux/drivers/misc/sgi-xp/xpc_partition.c 2008-07-03 11:06:20.000000000 -0500
@@ -73,6 +73,12 @@ xpc_get_rsvd_page_pa(int nasid)

while (1) {

+ /* !!! rp_pa will need to be _gpa on UV.
+ * ??? So do we save it into the architecture specific parts
+ * ??? of the xpc_partition structure? Do we rename this
+ * ??? function or have two versions? Rename rp_pa for UV to
+ * ??? rp_gpa?
+ */
ret = xpc_get_partition_rsvd_page_pa(buf, &cookie, &rp_pa,
&len);

@@ -118,9 +124,10 @@ xpc_get_rsvd_page_pa(int nasid)
* other partitions to discover we are alive and establish initial
* communications.
*/
-struct xpc_rsvd_page *
+int
xpc_setup_rsvd_page(void)
{
+ int ret;
struct xpc_rsvd_page *rp;
unsigned long rp_pa;
unsigned long new_ts_jiffies;
@@ -132,7 +139,7 @@ xpc_setup_rsvd_page(void)
preempt_enable();
if (rp_pa == 0) {
dev_err(xpc_part, "SAL failed to locate the reserved page\n");
- return NULL;
+ return -ESRCH;
}
rp = (struct xpc_rsvd_page *)__va(rp_pa);

@@ -146,7 +153,7 @@ xpc_setup_rsvd_page(void)
dev_err(xpc_part, "the reserved page's partid of %d is outside "
"supported range (< 0 || >= %d)\n", rp->SAL_partid,
xp_max_npartitions);
- return NULL;
+ return -EINVAL;
}

rp->version = XPC_RP_VERSION;
@@ -165,8 +172,9 @@ xpc_setup_rsvd_page(void)
xpc_part_nasids = XPC_RP_PART_NASIDS(rp);
xpc_mach_nasids = XPC_RP_MACH_NASIDS(rp);

- if (xpc_rsvd_page_init(rp) != xpSuccess)
- return NULL;
+ ret = xpc_setup_rsvd_page_sn(rp);
+ if (ret != 0)
+ return ret;

/*
* Set timestamp of when reserved page was setup by XPC.
@@ -178,7 +186,15 @@ xpc_setup_rsvd_page(void)
new_ts_jiffies++;
rp->ts_jiffies = new_ts_jiffies;

- return rp;
+ xpc_rsvd_page = rp;
+ return 0;
+}
+
+void
+xpc_teardown_rsvd_page(void)
+{
+ /* a zero timestamp indicates our rsvd page is not initialized */
+ xpc_rsvd_page->ts_jiffies = 0;
}

/*
Index: linux/drivers/misc/sgi-xp/xpc_sn2.c
===================================================================
--- linux.orig/drivers/misc/sgi-xp/xpc_sn2.c 2008-07-03 11:06:04.000000000 -0500
+++ linux/drivers/misc/sgi-xp/xpc_sn2.c 2008-07-03 11:07:53.000000000 -0500
@@ -53,12 +53,19 @@
* Buffer used to store a local copy of portions of a remote partition's
* reserved page (either its header and part_nasids mask, or its vars).
*/
-static char *xpc_remote_copy_buffer_sn2;
static void *xpc_remote_copy_buffer_base_sn2;
+static char *xpc_remote_copy_buffer_sn2;

static struct xpc_vars_sn2 *xpc_vars_sn2;
static struct xpc_vars_part_sn2 *xpc_vars_part_sn2;

+static int
+xpc_setup_partitions_sn_sn2(void)
+{
+ /* nothing needs to be done */
+ return 0;
+}
+
/* SH_IPI_ACCESS shub register value on startup */
static u64 xpc_sh1_IPI_access_sn2;
static u64 xpc_sh2_IPI_access0_sn2;
@@ -198,7 +205,12 @@ xpc_init_IRQ_amo_sn2(int index)
static irqreturn_t
xpc_handle_activate_IRQ_sn2(int irq, void *dev_id)
{
- atomic_inc(&xpc_activate_IRQ_rcvd);
+ unsigned long irq_flags;
+
+ spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+ xpc_activate_IRQ_rcvd++;
+ spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+
wake_up_interruptible(&xpc_activate_IRQ_wq);
return IRQ_HANDLED;
}
@@ -222,6 +234,7 @@ xpc_send_activate_IRQ_sn2(unsigned long
static void
xpc_send_local_activate_IRQ_sn2(int from_nasid)
{
+ unsigned long irq_flags;
struct amo *amos = (struct amo *)__va(xpc_vars_sn2->amos_page_pa +
(XPC_ACTIVATE_IRQ_AMOS_SN2 *
sizeof(struct amo)));
@@ -230,7 +243,10 @@ xpc_send_local_activate_IRQ_sn2(int from
FETCHOP_STORE_OP(TO_AMO((u64)&amos[BIT_WORD(from_nasid / 2)].variable),
FETCHOP_OR, BIT_MASK(from_nasid / 2));

- atomic_inc(&xpc_activate_IRQ_rcvd);
+ spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+ xpc_activate_IRQ_rcvd++;
+ spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+
wake_up_interruptible(&xpc_activate_IRQ_wq);
}

@@ -375,7 +391,7 @@ static void
xpc_send_chctl_closerequest_sn2(struct xpc_channel *ch,
unsigned long *irq_flags)
{
- struct xpc_openclose_args *args = ch->local_openclose_args;
+ struct xpc_openclose_args *args = ch->sn.sn2.local_openclose_args;

args->reason = ch->reason;
XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_CLOSEREQUEST, irq_flags);
@@ -390,7 +406,7 @@ xpc_send_chctl_closereply_sn2(struct xpc
static void
xpc_send_chctl_openrequest_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
{
- struct xpc_openclose_args *args = ch->local_openclose_args;
+ struct xpc_openclose_args *args = ch->sn.sn2.local_openclose_args;

args->msg_size = ch->msg_size;
args->local_nentries = ch->local_nentries;
@@ -400,11 +416,11 @@ xpc_send_chctl_openrequest_sn2(struct xp
static void
xpc_send_chctl_openreply_sn2(struct xpc_channel *ch, unsigned long *irq_flags)
{
- struct xpc_openclose_args *args = ch->local_openclose_args;
+ struct xpc_openclose_args *args = ch->sn.sn2.local_openclose_args;

args->remote_nentries = ch->remote_nentries;
args->local_nentries = ch->local_nentries;
- args->local_msgqueue_pa = xp_pa(ch->local_msgqueue);
+ args->local_msgqueue_pa = xp_pa(ch->sn.sn2.local_msgqueue);
XPC_SEND_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_OPENREPLY, irq_flags);
}

@@ -420,6 +436,13 @@ xpc_send_chctl_local_msgrequest_sn2(stru
XPC_SEND_LOCAL_NOTIFY_IRQ_SN2(ch, XPC_CHCTL_MSGREQUEST);
}

+static void
+xpc_save_remote_msgqueue_pa_sn2(struct xpc_channel *ch,
+ unsigned long msgqueue_pa)
+{
+ ch->sn.sn2.remote_msgqueue_pa = msgqueue_pa;
+}
+
/*
* This next set of functions are used to keep track of when a partition is
* potentially engaged in accessing memory belonging to another partition.
@@ -489,6 +512,17 @@ xpc_indicate_partition_disengaged_sn2(st
part_sn2->activate_IRQ_phys_cpuid);
}

+static void
+xpc_assume_partition_disengaged_sn2(short partid)
+{
+ struct amo *amo = xpc_vars_sn2->amos_page +
+ XPC_ENGAGED_PARTITIONS_AMO_SN2;
+
+ /* clear bit(s) based on partid mask in our partition's amo */
+ FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
+ ~BIT(partid));
+}
+
static int
xpc_partition_engaged_sn2(short partid)
{
@@ -510,17 +544,6 @@ xpc_any_partition_engaged_sn2(void)
return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) != 0;
}

-static void
-xpc_assume_partition_disengaged_sn2(short partid)
-{
- struct amo *amo = xpc_vars_sn2->amos_page +
- XPC_ENGAGED_PARTITIONS_AMO_SN2;
-
- /* clear bit(s) based on partid mask in our partition's amo */
- FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
- ~BIT(partid));
-}
-
/* original protection values for each node */
static u64 xpc_prot_vec_sn2[MAX_NUMNODES];

@@ -595,8 +618,8 @@ xpc_get_partition_rsvd_page_pa_sn2(void
}


-static enum xp_retval
-xpc_rsvd_page_init_sn2(struct xpc_rsvd_page *rp)
+static int
+xpc_setup_rsvd_page_sn_sn2(struct xpc_rsvd_page *rp)
{
struct amo *amos_page;
int i;
@@ -627,7 +650,7 @@ xpc_rsvd_page_init_sn2(struct xpc_rsvd_p
amos_page = (struct amo *)TO_AMO(uncached_alloc_page(0, 1));
if (amos_page == NULL) {
dev_err(xpc_part, "can't allocate page of amos\n");
- return xpNoMemory;
+ return -ENOMEM;
}

/*
@@ -639,7 +662,7 @@ xpc_rsvd_page_init_sn2(struct xpc_rsvd_p
dev_err(xpc_part, "can't allow amo operations\n");
uncached_free_page(__IA64_UNCACHED_OFFSET |
TO_PHYS((u64)amos_page), 1);
- return ret;
+ return -EPERM;
}
}

@@ -665,7 +688,7 @@ xpc_rsvd_page_init_sn2(struct xpc_rsvd_p
(void)xpc_init_IRQ_amo_sn2(XPC_ENGAGED_PARTITIONS_AMO_SN2);
(void)xpc_init_IRQ_amo_sn2(XPC_DEACTIVATE_REQUEST_AMO_SN2);

- return xpSuccess;
+ return 0;
}

static void
@@ -1082,10 +1105,19 @@ xpc_identify_activate_IRQ_sender_sn2(voi
}

static void
-xpc_process_activate_IRQ_rcvd_sn2(int n_IRQs_expected)
+xpc_process_activate_IRQ_rcvd_sn2(void)
{
+ unsigned long irq_flags;
+ int n_IRQs_expected;
int n_IRQs_detected;

+ DBUG_ON(xpc_activate_IRQ_rcvd == 0);
+
+ spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+ n_IRQs_expected = xpc_activate_IRQ_rcvd;
+ xpc_activate_IRQ_rcvd = 0;
+ spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+
n_IRQs_detected = xpc_identify_activate_IRQ_sender_sn2();
if (n_IRQs_detected < n_IRQs_expected) {
/* retry once to help avoid missing amo */
@@ -1094,116 +1126,63 @@ xpc_process_activate_IRQ_rcvd_sn2(int n_
}

/*
- * Guarantee that the kzalloc'd memory is cacheline aligned.
- */
-static void *
-xpc_kzalloc_cacheline_aligned_sn2(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 infrastructure necessary to support XPartition Communication
- * between the specified remote partition and the local one.
+ * Setup the channel structures that are sn2 specific.
*/
static enum xp_retval
-xpc_setup_infrastructure_sn2(struct xpc_partition *part)
+xpc_setup_ch_structures_sn_sn2(struct xpc_partition *part)
{
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
+ struct xpc_channel_sn2 *ch_sn2;
enum xp_retval retval;
int ret;
int cpuid;
int ch_number;
- struct xpc_channel *ch;
struct timer_list *timer;
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;
- }
-
/* allocate all the required GET/PUT values */

part_sn2->local_GPs =
- xpc_kzalloc_cacheline_aligned_sn2(XPC_GP_SIZE, GFP_KERNEL,
- &part_sn2->local_GPs_base);
+ xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE, GFP_KERNEL,
+ &part_sn2->local_GPs_base);
if (part_sn2->local_GPs == NULL) {
dev_err(xpc_chan, "can't get memory for local get/put "
"values\n");
- retval = xpNoMemory;
- goto out_1;
+ return xpNoMemory;
}

part_sn2->remote_GPs =
- xpc_kzalloc_cacheline_aligned_sn2(XPC_GP_SIZE, GFP_KERNEL,
- &part_sn2->remote_GPs_base);
+ xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE, GFP_KERNEL,
+ &part_sn2->remote_GPs_base);
if (part_sn2->remote_GPs == NULL) {
dev_err(xpc_chan, "can't get memory for remote get/put "
"values\n");
retval = xpNoMemory;
- goto out_2;
+ goto out_1;
}

part_sn2->remote_GPs_pa = 0;

/* allocate all the required open and close args */

- part->local_openclose_args =
- xpc_kzalloc_cacheline_aligned_sn2(XPC_OPENCLOSE_ARGS_SIZE,
- GFP_KERNEL,
- &part->local_openclose_args_base);
- if (part->local_openclose_args == NULL) {
+ part_sn2->local_openclose_args =
+ xpc_kzalloc_cacheline_aligned(XPC_OPENCLOSE_ARGS_SIZE,
+ GFP_KERNEL, &part_sn2->
+ local_openclose_args_base);
+ if (part_sn2->local_openclose_args == NULL) {
dev_err(xpc_chan, "can't get memory for local connect args\n");
retval = xpNoMemory;
- goto out_3;
- }
-
- part->remote_openclose_args =
- xpc_kzalloc_cacheline_aligned_sn2(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");
- retval = xpNoMemory;
- goto out_4;
+ goto out_2;
}

part_sn2->remote_openclose_args_pa = 0;

part_sn2->local_chctl_amo_va = xpc_init_IRQ_amo_sn2(partid);
- part->chctl.all_flags = 0;
- spin_lock_init(&part->chctl_lock);

part_sn2->notify_IRQ_nasid = 0;
part_sn2->notify_IRQ_phys_cpuid = 0;
part_sn2->remote_chctl_amo_va = NULL;

- atomic_set(&part->channel_mgr_requests, 1);
- init_waitqueue_head(&part->channel_mgr_wq);
-
sprintf(part_sn2->notify_IRQ_owner, "xpc%02d", partid);
ret = request_irq(SGI_XPC_NOTIFY, xpc_handle_notify_IRQ_sn2,
IRQF_SHARED, part_sn2->notify_IRQ_owner,
@@ -1212,7 +1191,7 @@ xpc_setup_infrastructure_sn2(struct xpc_
dev_err(xpc_chan, "can't register NOTIFY IRQ handler, "
"errno=%d\n", -ret);
retval = xpLackOfResources;
- goto out_5;
+ goto out_3;
}

/* Setup a timer to check for dropped notify IRQs */
@@ -1224,45 +1203,17 @@ xpc_setup_infrastructure_sn2(struct xpc_
timer->expires = jiffies + XPC_DROPPED_NOTIFY_IRQ_WAIT_INTERVAL;
add_timer(timer);

- 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;
-
- ch->sn.sn2.local_GP = &part_sn2->local_GPs[ch_number];
- ch->local_openclose_args =
- &part->local_openclose_args[ch_number];
-
- atomic_set(&ch->kthreads_assigned, 0);
- atomic_set(&ch->kthreads_idle, 0);
- atomic_set(&ch->kthreads_active, 0);
+ ch_sn2 = &part->channels[ch_number].sn.sn2;

- atomic_set(&ch->references, 0);
- atomic_set(&ch->n_to_notify, 0);
+ ch_sn2->local_GP = &part_sn2->local_GPs[ch_number];
+ ch_sn2->local_openclose_args =
+ &part_sn2->local_openclose_args[ch_number];

- spin_lock_init(&ch->lock);
- mutex_init(&ch->sn.sn2.msg_to_pull_mutex);
- 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);
+ mutex_init(&ch_sn2->msg_to_pull_mutex);
}

/*
- * 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;
-
- /*
* Setup the per partition specific variables required by the
* remote partition to establish channel connections with us.
*
@@ -1271,7 +1222,7 @@ xpc_setup_infrastructure_sn2(struct xpc_
*/
xpc_vars_part_sn2[partid].GPs_pa = xp_pa(part_sn2->local_GPs);
xpc_vars_part_sn2[partid].openclose_args_pa =
- xp_pa(part->local_openclose_args);
+ xp_pa(part_sn2->local_openclose_args);
xpc_vars_part_sn2[partid].chctl_amo_pa =
xp_pa(part_sn2->local_chctl_amo_va);
cpuid = raw_smp_processor_id(); /* any CPU in this partition will do */
@@ -1279,80 +1230,48 @@ xpc_setup_infrastructure_sn2(struct xpc_
xpc_vars_part_sn2[partid].notify_IRQ_phys_cpuid =
cpu_physical_id(cpuid);
xpc_vars_part_sn2[partid].nchannels = part->nchannels;
- xpc_vars_part_sn2[partid].magic = XPC_VP_MAGIC1;
+ xpc_vars_part_sn2[partid].magic = XPC_VP_MAGIC1_SN2;

return xpSuccess;

- /* setup of infrastructure failed */
-out_5:
- kfree(part->remote_openclose_args_base);
- part->remote_openclose_args = NULL;
-out_4:
- kfree(part->local_openclose_args_base);
- part->local_openclose_args = NULL;
+ /* setup of ch structures failed */
out_3:
+ kfree(part_sn2->local_openclose_args_base);
+ part_sn2->local_openclose_args = NULL;
+out_2:
kfree(part_sn2->remote_GPs_base);
part_sn2->remote_GPs = NULL;
-out_2:
+out_1:
kfree(part_sn2->local_GPs_base);
part_sn2->local_GPs = NULL;
-out_1:
- kfree(part->channels);
- part->channels = NULL;
return retval;
}

/*
- * Teardown the infrastructure necessary to support XPartition Communication
- * between the specified remote partition and the local one.
+ * Teardown the channel structures that are sn2 specific.
*/
static void
-xpc_teardown_infrastructure_sn2(struct xpc_partition *part)
+xpc_teardown_ch_structures_sn_sn2(struct xpc_partition *part)
{
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
short partid = XPC_PARTID(part);

/*
- * We start off by making this partition inaccessible to local
- * processes by marking it as no longer setup. Then we make it
- * inaccessible to remote processes by clearing the XPC per partition
- * specific variable's magic # (which indicates that these variables
- * are no longer valid) and by ignoring all XPC notify IRQs sent to
- * this partition.
+ * Indicate that the variables specific to the remote partition are no
+ * longer available for its use.
*/
-
- DBUG_ON(atomic_read(&part->nchannels_engaged) != 0);
- DBUG_ON(atomic_read(&part->nchannels_active) != 0);
- DBUG_ON(part->setup_state != XPC_P_SS_SETUP);
- part->setup_state = XPC_P_SS_WTEARDOWN;
-
xpc_vars_part_sn2[partid].magic = 0;

- free_irq(SGI_XPC_NOTIFY, (void *)(u64)partid);
-
- /*
- * Before proceeding with the teardown we have to wait until all
- * existing references cease.
- */
- wait_event(part->teardown_wq, (atomic_read(&part->references) == 0));
-
- /* now we can begin tearing down the infrastructure */
-
- part->setup_state = XPC_P_SS_TORNDOWN;
-
/* in case we've still got outstanding timers registered... */
del_timer_sync(&part_sn2->dropped_notify_IRQ_timer);
+ free_irq(SGI_XPC_NOTIFY, (void *)(u64)partid);

- kfree(part->remote_openclose_args_base);
- part->remote_openclose_args = NULL;
- kfree(part->local_openclose_args_base);
- part->local_openclose_args = NULL;
+ kfree(part_sn2->local_openclose_args_base);
+ part_sn2->local_openclose_args = NULL;
kfree(part_sn2->remote_GPs_base);
part_sn2->remote_GPs = NULL;
kfree(part_sn2->local_GPs_base);
part_sn2->local_GPs = NULL;
- kfree(part->channels);
- part->channels = NULL;
part_sn2->local_chctl_amo_va = NULL;
}

@@ -1429,8 +1348,8 @@ xpc_pull_remote_vars_part_sn2(struct xpc

/* see if they've been set up yet */

- if (pulled_entry->magic != XPC_VP_MAGIC1 &&
- pulled_entry->magic != XPC_VP_MAGIC2) {
+ if (pulled_entry->magic != XPC_VP_MAGIC1_SN2 &&
+ pulled_entry->magic != XPC_VP_MAGIC2_SN2) {

if (pulled_entry->magic != 0) {
dev_dbg(xpc_chan, "partition %d's XPC vars_part for "
@@ -1443,7 +1362,7 @@ xpc_pull_remote_vars_part_sn2(struct xpc
return xpRetry;
}

- if (xpc_vars_part_sn2[partid].magic == XPC_VP_MAGIC1) {
+ if (xpc_vars_part_sn2[partid].magic == XPC_VP_MAGIC1_SN2) {

/* validate the variables */

@@ -1473,10 +1392,10 @@ xpc_pull_remote_vars_part_sn2(struct xpc

/* let the other side know that we've pulled their variables */

- xpc_vars_part_sn2[partid].magic = XPC_VP_MAGIC2;
+ xpc_vars_part_sn2[partid].magic = XPC_VP_MAGIC2_SN2;
}

- if (pulled_entry->magic == XPC_VP_MAGIC1)
+ if (pulled_entry->magic == XPC_VP_MAGIC1_SN2)
return xpRetry;

return xpSuccess;
@@ -1605,6 +1524,7 @@ xpc_get_chctl_all_flags_sn2(struct xpc_p
static enum xp_retval
xpc_allocate_local_msgqueue_sn2(struct xpc_channel *ch)
{
+ struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
unsigned long irq_flags;
int nentries;
size_t nbytes;
@@ -1612,17 +1532,17 @@ xpc_allocate_local_msgqueue_sn2(struct x
for (nentries = ch->local_nentries; nentries > 0; nentries--) {

nbytes = nentries * ch->msg_size;
- ch->local_msgqueue =
- xpc_kzalloc_cacheline_aligned_sn2(nbytes, GFP_KERNEL,
- &ch->local_msgqueue_base);
- if (ch->local_msgqueue == NULL)
+ ch_sn2->local_msgqueue =
+ xpc_kzalloc_cacheline_aligned(nbytes, GFP_KERNEL,
+ &ch_sn2->local_msgqueue_base);
+ if (ch_sn2->local_msgqueue == NULL)
continue;

nbytes = nentries * sizeof(struct xpc_notify);
- ch->notify_queue = kzalloc(nbytes, GFP_KERNEL);
- if (ch->notify_queue == NULL) {
- kfree(ch->local_msgqueue_base);
- ch->local_msgqueue = NULL;
+ ch_sn2->notify_queue = kzalloc(nbytes, GFP_KERNEL);
+ if (ch_sn2->notify_queue == NULL) {
+ kfree(ch_sn2->local_msgqueue_base);
+ ch_sn2->local_msgqueue = NULL;
continue;
}

@@ -1649,6 +1569,7 @@ xpc_allocate_local_msgqueue_sn2(struct x
static enum xp_retval
xpc_allocate_remote_msgqueue_sn2(struct xpc_channel *ch)
{
+ struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
unsigned long irq_flags;
int nentries;
size_t nbytes;
@@ -1658,10 +1579,10 @@ xpc_allocate_remote_msgqueue_sn2(struct
for (nentries = ch->remote_nentries; nentries > 0; nentries--) {

nbytes = nentries * ch->msg_size;
- ch->remote_msgqueue =
- xpc_kzalloc_cacheline_aligned_sn2(nbytes, GFP_KERNEL,
- &ch->remote_msgqueue_base);
- if (ch->remote_msgqueue == NULL)
+ ch_sn2->remote_msgqueue =
+ xpc_kzalloc_cacheline_aligned(nbytes, GFP_KERNEL, &ch_sn2->
+ remote_msgqueue_base);
+ if (ch_sn2->remote_msgqueue == NULL)
continue;

spin_lock_irqsave(&ch->lock, irq_flags);
@@ -1687,8 +1608,9 @@ xpc_allocate_remote_msgqueue_sn2(struct
* Note: Assumes all of the channel sizes are filled in.
*/
static enum xp_retval
-xpc_allocate_msgqueues_sn2(struct xpc_channel *ch)
+xpc_setup_msg_structures_sn2(struct xpc_channel *ch)
{
+ struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
enum xp_retval ret;

DBUG_ON(ch->flags & XPC_C_SETUP);
@@ -1698,10 +1620,10 @@ xpc_allocate_msgqueues_sn2(struct xpc_ch

ret = xpc_allocate_remote_msgqueue_sn2(ch);
if (ret != xpSuccess) {
- kfree(ch->local_msgqueue_base);
- ch->local_msgqueue = NULL;
- kfree(ch->notify_queue);
- ch->notify_queue = NULL;
+ kfree(ch_sn2->local_msgqueue_base);
+ ch_sn2->local_msgqueue = NULL;
+ kfree(ch_sn2->notify_queue);
+ ch_sn2->notify_queue = NULL;
}
}
return ret;
@@ -1715,21 +1637,13 @@ xpc_allocate_msgqueues_sn2(struct xpc_ch
* they're cleared when XPC_C_DISCONNECTED is cleared.
*/
static void
-xpc_free_msgqueues_sn2(struct xpc_channel *ch)
+xpc_teardown_msg_structures_sn2(struct xpc_channel *ch)
{
struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;

DBUG_ON(!spin_is_locked(&ch->lock));
- DBUG_ON(atomic_read(&ch->n_to_notify) != 0);

- ch->remote_msgqueue_pa = 0;
- ch->func = NULL;
- ch->key = NULL;
- ch->msg_size = 0;
- ch->local_nentries = 0;
- ch->remote_nentries = 0;
- ch->kthreads_assigned_limit = 0;
- ch->kthreads_idle_limit = 0;
+ ch_sn2->remote_msgqueue_pa = 0;

ch_sn2->local_GP->get = 0;
ch_sn2->local_GP->put = 0;
@@ -1745,12 +1659,12 @@ xpc_free_msgqueues_sn2(struct xpc_channe
dev_dbg(xpc_chan, "ch->flags=0x%x, partid=%d, channel=%d\n",
ch->flags, ch->partid, ch->number);

- kfree(ch->local_msgqueue_base);
- ch->local_msgqueue = NULL;
- kfree(ch->remote_msgqueue_base);
- ch->remote_msgqueue = NULL;
- kfree(ch->notify_queue);
- ch->notify_queue = NULL;
+ kfree(ch_sn2->local_msgqueue_base);
+ ch_sn2->local_msgqueue = NULL;
+ kfree(ch_sn2->remote_msgqueue_base);
+ ch_sn2->remote_msgqueue = NULL;
+ kfree(ch_sn2->notify_queue);
+ ch_sn2->notify_queue = NULL;
}
}

@@ -1766,7 +1680,7 @@ xpc_notify_senders_sn2(struct xpc_channe

while (++get < put && atomic_read(&ch->n_to_notify) > 0) {

- notify = &ch->notify_queue[get % ch->local_nentries];
+ notify = &ch->sn.sn2.notify_queue[get % ch->local_nentries];

/*
* See if the notify entry indicates it was associated with
@@ -1818,7 +1732,7 @@ xpc_clear_local_msgqueue_flags_sn2(struc

get = ch_sn2->w_remote_GP.get;
do {
- msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
+ msg = (struct xpc_msg *)((u64)ch_sn2->local_msgqueue +
(get % ch->local_nentries) *
ch->msg_size);
msg->flags = 0;
@@ -1837,7 +1751,7 @@ xpc_clear_remote_msgqueue_flags_sn2(stru

put = ch_sn2->w_remote_GP.put;
do {
- msg = (struct xpc_msg *)((u64)ch->remote_msgqueue +
+ msg = (struct xpc_msg *)((u64)ch_sn2->remote_msgqueue +
(put % ch->remote_nentries) *
ch->msg_size);
msg->flags = 0;
@@ -1976,8 +1890,9 @@ xpc_pull_remote_msg_sn2(struct xpc_chann
}

msg_offset = msg_index * ch->msg_size;
- msg = (struct xpc_msg *)((u64)ch->remote_msgqueue + msg_offset);
- remote_msg_pa = ch->remote_msgqueue_pa + msg_offset;
+ msg = (struct xpc_msg *)((u64)ch_sn2->remote_msgqueue +
+ msg_offset);
+ remote_msg_pa = ch_sn2->remote_msgqueue_pa + msg_offset;

ret = xpc_pull_remote_cachelines_sn2(part, msg, remote_msg_pa,
nmsgs * ch->msg_size);
@@ -2001,7 +1916,7 @@ xpc_pull_remote_msg_sn2(struct xpc_chann

/* return the message we were looking for */
msg_offset = (get % ch->remote_nentries) * ch->msg_size;
- msg = (struct xpc_msg *)((u64)ch->remote_msgqueue + msg_offset);
+ msg = (struct xpc_msg *)((u64)ch_sn2->remote_msgqueue + msg_offset);

return msg;
}
@@ -2080,7 +1995,7 @@ xpc_send_msgs_sn2(struct xpc_channel *ch
if (put == ch_sn2->w_local_GP.put)
break;

- msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
+ msg = (struct xpc_msg *)((u64)ch_sn2->local_msgqueue +
(put % ch->local_nentries) *
ch->msg_size);

@@ -2182,7 +2097,7 @@ xpc_allocate_msg_sn2(struct xpc_channel
}

/* get the message's address and initialize it */
- msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
+ msg = (struct xpc_msg *)((u64)ch_sn2->local_msgqueue +
(put % ch->local_nentries) * ch->msg_size);

DBUG_ON(msg->flags != 0);
@@ -2207,6 +2122,7 @@ xpc_send_msg_sn2(struct xpc_channel *ch,
void *key)
{
enum xp_retval ret = xpSuccess;
+ struct xpc_channel_sn2 *ch_sn2 = &ch->sn.sn2;
struct xpc_msg *msg = msg;
struct xpc_notify *notify = notify;
s64 msg_number;
@@ -2243,7 +2159,7 @@ xpc_send_msg_sn2(struct xpc_channel *ch,

atomic_inc(&ch->n_to_notify);

- notify = &ch->notify_queue[msg_number % ch->local_nentries];
+ notify = &ch_sn2->notify_queue[msg_number % ch->local_nentries];
notify->func = func;
notify->key = key;
notify->type = notify_type;
@@ -2279,7 +2195,7 @@ xpc_send_msg_sn2(struct xpc_channel *ch,

/* see if the message is next in line to be sent, if so send it */

- put = ch->sn.sn2.local_GP->put;
+ put = ch_sn2->local_GP->put;
if (put == msg_number)
xpc_send_msgs_sn2(ch, put);

@@ -2307,7 +2223,7 @@ xpc_acknowledge_msgs_sn2(struct xpc_chan
if (get == ch_sn2->w_local_GP.get)
break;

- msg = (struct xpc_msg *)((u64)ch->remote_msgqueue +
+ msg = (struct xpc_msg *)((u64)ch_sn2->remote_msgqueue +
(get % ch->remote_nentries) *
ch->msg_size);

@@ -2385,8 +2301,9 @@ xpc_init_sn2(void)
int ret;
size_t buf_size;

+ xpc_setup_partitions_sn = xpc_setup_partitions_sn_sn2;
xpc_get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_sn2;
- xpc_rsvd_page_init = xpc_rsvd_page_init_sn2;
+ xpc_setup_rsvd_page_sn = xpc_setup_rsvd_page_sn_sn2;
xpc_increment_heartbeat = xpc_increment_heartbeat_sn2;
xpc_offline_heartbeat = xpc_offline_heartbeat_sn2;
xpc_online_heartbeat = xpc_online_heartbeat_sn2;
@@ -2403,29 +2320,33 @@ xpc_init_sn2(void)
xpc_cancel_partition_deactivation_request_sn2;

xpc_process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_sn2;
- xpc_setup_infrastructure = xpc_setup_infrastructure_sn2;
- xpc_teardown_infrastructure = xpc_teardown_infrastructure_sn2;
+ xpc_setup_ch_structures_sn = xpc_setup_ch_structures_sn_sn2;
+ xpc_teardown_ch_structures_sn = xpc_teardown_ch_structures_sn_sn2;
xpc_make_first_contact = xpc_make_first_contact_sn2;
+
xpc_get_chctl_all_flags = xpc_get_chctl_all_flags_sn2;
- xpc_allocate_msgqueues = xpc_allocate_msgqueues_sn2;
- xpc_free_msgqueues = xpc_free_msgqueues_sn2;
+ xpc_send_chctl_closerequest = xpc_send_chctl_closerequest_sn2;
+ xpc_send_chctl_closereply = xpc_send_chctl_closereply_sn2;
+ xpc_send_chctl_openrequest = xpc_send_chctl_openrequest_sn2;
+ xpc_send_chctl_openreply = xpc_send_chctl_openreply_sn2;
+
+ xpc_save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_sn2;
+
+ xpc_setup_msg_structures = xpc_setup_msg_structures_sn2;
+ xpc_teardown_msg_structures = xpc_teardown_msg_structures_sn2;
+
xpc_notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_sn2;
xpc_process_msg_chctl_flags = xpc_process_msg_chctl_flags_sn2;
xpc_n_of_deliverable_msgs = xpc_n_of_deliverable_msgs_sn2;
xpc_get_deliverable_msg = xpc_get_deliverable_msg_sn2;

xpc_indicate_partition_engaged = xpc_indicate_partition_engaged_sn2;
- xpc_partition_engaged = xpc_partition_engaged_sn2;
- xpc_any_partition_engaged = xpc_any_partition_engaged_sn2;
xpc_indicate_partition_disengaged =
xpc_indicate_partition_disengaged_sn2;
+ xpc_partition_engaged = xpc_partition_engaged_sn2;
+ xpc_any_partition_engaged = xpc_any_partition_engaged_sn2;
xpc_assume_partition_disengaged = xpc_assume_partition_disengaged_sn2;

- xpc_send_chctl_closerequest = xpc_send_chctl_closerequest_sn2;
- xpc_send_chctl_closereply = xpc_send_chctl_closereply_sn2;
- xpc_send_chctl_openrequest = xpc_send_chctl_openrequest_sn2;
- xpc_send_chctl_openreply = xpc_send_chctl_openreply_sn2;
-
xpc_send_msg = xpc_send_msg_sn2;
xpc_received_msg = xpc_received_msg_sn2;

Index: linux/drivers/misc/sgi-xp/xp.h
===================================================================
--- linux.orig/drivers/misc/sgi-xp/xp.h 2008-07-03 11:06:04.000000000 -0500
+++ linux/drivers/misc/sgi-xp/xp.h 2008-07-03 11:06:20.000000000 -0500
@@ -208,8 +208,9 @@ enum xp_retval {
xpNeedMoreInfo, /* 57: more info is needed by SAL */

xpGruCopyError, /* 58: gru_copy_gru() returned error */
+ xpGruSendMqError, /* 59: gru send message queue related error */

- xpUnknownReason /* 59: unknown reason - must be last in enum */
+ xpUnknownReason /* 60: unknown reason - must be last in enum */
};

/*
Index: linux/drivers/misc/sgi-xp/xpc_channel.c
===================================================================
--- linux.orig/drivers/misc/sgi-xp/xpc_channel.c 2008-07-03 11:06:04.000000000 -0500
+++ linux/drivers/misc/sgi-xp/xpc_channel.c 2008-07-03 11:06:20.000000000 -0500
@@ -39,7 +39,7 @@ xpc_process_connect(struct xpc_channel *

if (!(ch->flags & XPC_C_SETUP)) {
spin_unlock_irqrestore(&ch->lock, *irq_flags);
- ret = xpc_allocate_msgqueues(ch);
+ ret = xpc_setup_msg_structures(ch);
spin_lock_irqsave(&ch->lock, *irq_flags);

if (ret != xpSuccess)
@@ -62,8 +62,6 @@ xpc_process_connect(struct xpc_channel *
if (!(ch->flags & XPC_C_ROPENREPLY))
return;

- DBUG_ON(ch->remote_msgqueue_pa == 0);
-
ch->flags = (XPC_C_CONNECTED | XPC_C_SETUP); /* clear all else */

dev_info(xpc_chan, "channel %d to partition %d connected\n",
@@ -134,13 +132,23 @@ xpc_process_disconnect(struct xpc_channe
spin_lock_irqsave(&ch->lock, *irq_flags);
}

+ DBUG_ON(atomic_read(&ch->n_to_notify) != 0);
+
/* it's now safe to free the channel's message queues */
- xpc_free_msgqueues(ch);
+ xpc_teardown_msg_structures(ch);
+
+ ch->func = NULL;
+ ch->key = NULL;
+ ch->msg_size = 0;
+ ch->local_nentries = 0;
+ ch->remote_nentries = 0;
+ ch->kthreads_assigned_limit = 0;
+ ch->kthreads_idle_limit = 0;

/*
* Mark the channel disconnected and clear all other flags, including
- * XPC_C_SETUP (because of call to xpc_free_msgqueues()) but not
- * including XPC_C_WDISCONNECT (if it was set).
+ * XPC_C_SETUP (because of call to xpc_teardown_msg_structures()) but
+ * not including XPC_C_WDISCONNECT (if it was set).
*/
ch->flags = (XPC_C_DISCONNECTED | (ch->flags & XPC_C_WDISCONNECT));

@@ -395,7 +403,7 @@ again:
DBUG_ON(args->remote_nentries == 0);

ch->flags |= XPC_C_ROPENREPLY;
- ch->remote_msgqueue_pa = args->local_msgqueue_pa;
+ xpc_save_remote_msgqueue_pa(ch, args->local_msgqueue_pa);

if (args->local_nentries < ch->remote_nentries) {
dev_dbg(xpc_chan, "XPC_CHCTL_OPENREPLY: new "

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