sgi-xp: setup the notify GRU message queue
Setup the notify GRU message queue that is used for sending user messages
on UV systems.
Signed-off-by: Dean Nelson <dcn@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/misc/sgi-xp/xpc_uv.c b/drivers/misc/sgi-xp/xpc_uv.c
index 689cb5c..1ac694c 100644
--- a/drivers/misc/sgi-xp/xpc_uv.c
+++ b/drivers/misc/sgi-xp/xpc_uv.c
@@ -66,8 +66,11 @@
mq_order = get_order(mq_size);
page = alloc_pages_node(nid, GFP_KERNEL | __GFP_ZERO | GFP_THISNODE,
mq_order);
- if (page == NULL)
+ if (page == NULL) {
+ dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to alloc %d "
+ "bytes of memory on nid=%d for GRU mq\n", mq_size, nid);
return NULL;
+ }
mq = page_address(page);
ret = gru_create_message_queue(mq, mq_size);
@@ -193,202 +196,226 @@
}
+static void
+xpc_handle_activate_mq_msg_uv(struct xpc_partition *part,
+ struct xpc_activate_mq_msghdr_uv *msg_hdr,
+ int *wakeup_hb_checker)
+{
+ unsigned long irq_flags;
+ struct xpc_partition_uv *part_uv = &part->sn.uv;
+ struct xpc_openclose_args *args;
+
+ part_uv->remote_act_state = msg_hdr->act_state;
+
+ switch (msg_hdr->type) {
+ case XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV:
+ /* 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 = container_of(msg_hdr,
+ struct xpc_activate_mq_msg_heartbeat_req_uv,
+ 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 = container_of(msg_hdr,
+ struct xpc_activate_mq_msg_heartbeat_req_uv,
+ 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 = container_of(msg_hdr,
+ struct xpc_activate_mq_msg_heartbeat_req_uv,
+ 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 = container_of(msg_hdr, struct
+ xpc_activate_mq_msg_activate_req_uv, hdr);
+
+ spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+ if (part_uv->act_state_req == 0)
+ xpc_activate_IRQ_rcvd++;
+ part_uv->act_state_req = XPC_P_ASR_ACTIVATE_UV;
+ part->remote_rp_pa = msg->rp_gpa; /* !!! _pa is _gpa */
+ part->remote_rp_ts_jiffies = msg_hdr->rp_ts_jiffies;
+ part_uv->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 = container_of(msg_hdr, struct
+ xpc_activate_mq_msg_deactivate_req_uv, hdr);
+
+ spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+ if (part_uv->act_state_req == 0)
+ xpc_activate_IRQ_rcvd++;
+ part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
+ part_uv->reason = msg->reason;
+ spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+
+ (*wakeup_hb_checker)++;
+ return;
+ }
+ case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: {
+ struct xpc_activate_mq_msg_chctl_closerequest_uv *msg;
+
+ msg = container_of(msg_hdr, struct
+ xpc_activate_mq_msg_chctl_closerequest_uv,
+ hdr);
+ args = &part->remote_openclose_args[msg->ch_number];
+ args->reason = msg->reason;
+
+ spin_lock_irqsave(&part->chctl_lock, irq_flags);
+ part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREQUEST;
+ spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
+
+ xpc_wakeup_channel_mgr(part);
+ break;
+ }
+ case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV: {
+ struct xpc_activate_mq_msg_chctl_closereply_uv *msg;
+
+ msg = container_of(msg_hdr, struct
+ xpc_activate_mq_msg_chctl_closereply_uv,
+ hdr);
+
+ spin_lock_irqsave(&part->chctl_lock, irq_flags);
+ part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREPLY;
+ spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
+
+ xpc_wakeup_channel_mgr(part);
+ break;
+ }
+ case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV: {
+ struct xpc_activate_mq_msg_chctl_openrequest_uv *msg;
+
+ msg = container_of(msg_hdr, struct
+ xpc_activate_mq_msg_chctl_openrequest_uv,
+ hdr);
+ args = &part->remote_openclose_args[msg->ch_number];
+ args->entry_size = msg->entry_size;
+ args->local_nentries = msg->local_nentries;
+
+ spin_lock_irqsave(&part->chctl_lock, irq_flags);
+ part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREQUEST;
+ spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
+
+ xpc_wakeup_channel_mgr(part);
+ break;
+ }
+ case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV: {
+ struct xpc_activate_mq_msg_chctl_openreply_uv *msg;
+
+ msg = container_of(msg_hdr, struct
+ xpc_activate_mq_msg_chctl_openreply_uv, hdr);
+ args = &part->remote_openclose_args[msg->ch_number];
+ args->remote_nentries = msg->remote_nentries;
+ args->local_nentries = msg->local_nentries;
+ args->local_msgqueue_pa = msg->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, XPC_PARTID(part));
+
+ /* get hb checker to deactivate from the remote partition */
+ spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+ if (part_uv->act_state_req == 0)
+ xpc_activate_IRQ_rcvd++;
+ part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
+ part_uv->reason = xpBadMsgType;
+ spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+
+ (*wakeup_hb_checker)++;
+ return;
+ }
+
+ if (msg_hdr->rp_ts_jiffies != part->remote_rp_ts_jiffies &&
+ part->remote_rp_ts_jiffies != 0) {
+ /*
+ * ??? Does what we do here need to be sensitive to
+ * ??? act_state or remote_act_state?
+ */
+ spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+ if (part_uv->act_state_req == 0)
+ xpc_activate_IRQ_rcvd++;
+ part_uv->act_state_req = XPC_P_ASR_REACTIVATE_UV;
+ spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+
+ (*wakeup_hb_checker)++;
+ }
+}
+
static 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,
+ dev_err(xpc_part, "xpc_handle_activate_IRQ_uv() "
+ "received invalid partid=0x%x in message\n",
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++;
+ } else {
+ part = &xpc_partitions[partid];
+ if (xpc_part_ref(part)) {
+ xpc_handle_activate_mq_msg_uv(part, msg_hdr,
+ &wakeup_hb_checker);
+ xpc_part_deref(part);
+ }
}
gru_free_message(xpc_activate_mq_uv, msg_hdr);
@@ -616,14 +643,82 @@
}
}
+static void
+xpc_cancel_partition_deactivation_request_uv(struct xpc_partition *part)
+{
+ /* nothing needs to be done */
+ return;
+}
+
+static void
+xpc_init_fifo_uv(struct xpc_fifo_head_uv *head)
+{
+ head->first = NULL;
+ head->last = NULL;
+ spin_lock_init(&head->lock);
+ head->n_entries = 0;
+}
+
+static void *
+xpc_get_fifo_entry_uv(struct xpc_fifo_head_uv *head)
+{
+ unsigned long irq_flags;
+ struct xpc_fifo_entry_uv *first;
+
+ spin_lock_irqsave(&head->lock, irq_flags);
+ first = head->first;
+ if (head->first != NULL) {
+ head->first = first->next;
+ if (head->first == NULL)
+ head->last = NULL;
+ }
+ head->n_entries++;
+ spin_unlock_irqrestore(&head->lock, irq_flags);
+ first->next = NULL;
+ return first;
+}
+
+static void
+xpc_put_fifo_entry_uv(struct xpc_fifo_head_uv *head,
+ struct xpc_fifo_entry_uv *last)
+{
+ unsigned long irq_flags;
+
+ last->next = NULL;
+ spin_lock_irqsave(&head->lock, irq_flags);
+ if (head->last != NULL)
+ head->last->next = last;
+ else
+ head->first = last;
+ head->last = last;
+ head->n_entries--;
+ BUG_ON(head->n_entries < 0);
+ spin_unlock_irqrestore(&head->lock, irq_flags);
+}
+
+static int
+xpc_n_of_fifo_entries_uv(struct xpc_fifo_head_uv *head)
+{
+ return head->n_entries;
+}
+
/*
* Setup the channel structures that are uv specific.
*/
static enum xp_retval
xpc_setup_ch_structures_sn_uv(struct xpc_partition *part)
{
- /* !!! this function needs fleshing out */
- return xpUnsupported;
+ struct xpc_channel_uv *ch_uv;
+ int ch_number;
+
+ for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
+ ch_uv = &part->channels[ch_number].sn.uv;
+
+ xpc_init_fifo_uv(&ch_uv->msg_slot_free_list);
+ xpc_init_fifo_uv(&ch_uv->recv_msg_list);
+ }
+
+ return xpSuccess;
}
/*
@@ -632,7 +727,7 @@
static void
xpc_teardown_ch_structures_sn_uv(struct xpc_partition *part)
{
- /* !!! this function needs fleshing out */
+ /* nothing needs to be done */
return;
}
@@ -680,20 +775,114 @@
}
static enum xp_retval
-xpc_setup_msg_structures_uv(struct xpc_channel *ch)
+xpc_allocate_send_msg_slot_uv(struct xpc_channel *ch)
{
- /* !!! this function needs fleshing out */
- return xpUnsupported;
+ struct xpc_channel_uv *ch_uv = &ch->sn.uv;
+ struct xpc_send_msg_slot_uv *msg_slot;
+ unsigned long irq_flags;
+ int nentries;
+ int entry;
+ size_t nbytes;
+
+ for (nentries = ch->local_nentries; nentries > 0; nentries--) {
+ nbytes = nentries * sizeof(struct xpc_send_msg_slot_uv);
+ ch_uv->send_msg_slots = kzalloc(nbytes, GFP_KERNEL);
+ if (ch_uv->send_msg_slots == NULL)
+ continue;
+
+ for (entry = 0; entry < nentries; entry++) {
+ msg_slot = &ch_uv->send_msg_slots[entry];
+
+ msg_slot->msg_slot_number = entry;
+ xpc_put_fifo_entry_uv(&ch_uv->msg_slot_free_list,
+ &msg_slot->next);
+ }
+
+ spin_lock_irqsave(&ch->lock, irq_flags);
+ if (nentries < ch->local_nentries)
+ ch->local_nentries = nentries;
+ spin_unlock_irqrestore(&ch->lock, irq_flags);
+ return xpSuccess;
+ }
+
+ return xpNoMemory;
}
+static enum xp_retval
+xpc_allocate_recv_msg_slot_uv(struct xpc_channel *ch)
+{
+ struct xpc_channel_uv *ch_uv = &ch->sn.uv;
+ struct xpc_notify_mq_msg_uv *msg_slot;
+ unsigned long irq_flags;
+ int nentries;
+ int entry;
+ size_t nbytes;
+
+ for (nentries = ch->remote_nentries; nentries > 0; nentries--) {
+ nbytes = nentries * ch->entry_size;
+ ch_uv->recv_msg_slots = kzalloc(nbytes, GFP_KERNEL);
+ if (ch_uv->recv_msg_slots == NULL)
+ continue;
+
+ for (entry = 0; entry < nentries; entry++) {
+ msg_slot = ch_uv->recv_msg_slots + entry *
+ ch->entry_size;
+
+ msg_slot->hdr.msg_slot_number = entry;
+ }
+
+ spin_lock_irqsave(&ch->lock, irq_flags);
+ if (nentries < ch->remote_nentries)
+ ch->remote_nentries = nentries;
+ spin_unlock_irqrestore(&ch->lock, irq_flags);
+ return xpSuccess;
+ }
+
+ return xpNoMemory;
+}
+
+/*
+ * Allocate msg_slots associated with the channel.
+ */
+static enum xp_retval
+xpc_setup_msg_structures_uv(struct xpc_channel *ch)
+{
+ static enum xp_retval ret;
+ struct xpc_channel_uv *ch_uv = &ch->sn.uv;
+
+ DBUG_ON(ch->flags & XPC_C_SETUP);
+
+ ret = xpc_allocate_send_msg_slot_uv(ch);
+ if (ret == xpSuccess) {
+
+ ret = xpc_allocate_recv_msg_slot_uv(ch);
+ if (ret != xpSuccess) {
+ kfree(ch_uv->send_msg_slots);
+ xpc_init_fifo_uv(&ch_uv->msg_slot_free_list);
+ }
+ }
+ return ret;
+}
+
+/*
+ * Free up msg_slots and clear other stuff that were setup for the specified
+ * channel.
+ */
static void
xpc_teardown_msg_structures_uv(struct xpc_channel *ch)
{
struct xpc_channel_uv *ch_uv = &ch->sn.uv;
+ DBUG_ON(!spin_is_locked(&ch->lock));
+
ch_uv->remote_notify_mq_gpa = 0;
- /* !!! this function needs fleshing out */
+ if (ch->flags & XPC_C_SETUP) {
+ xpc_init_fifo_uv(&ch_uv->msg_slot_free_list);
+ kfree(ch_uv->send_msg_slots);
+ xpc_init_fifo_uv(&ch_uv->recv_msg_list);
+ kfree(ch_uv->recv_msg_slots);
+ }
}
static void
@@ -723,7 +912,7 @@
struct xpc_activate_mq_msg_chctl_openrequest_uv msg;
msg.ch_number = ch->number;
- msg.msg_size = ch->msg_size;
+ msg.entry_size = ch->entry_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);
@@ -743,6 +932,18 @@
}
static void
+xpc_send_chctl_local_msgrequest_uv(struct xpc_partition *part, int ch_number)
+{
+ unsigned long irq_flags;
+
+ spin_lock_irqsave(&part->chctl_lock, irq_flags);
+ part->chctl.flags[ch_number] |= XPC_CHCTL_MSGREQUEST;
+ spin_unlock_irqrestore(&part->chctl_lock, irq_flags);
+
+ xpc_wakeup_channel_mgr(part);
+}
+
+static void
xpc_save_remote_msgqueue_pa_uv(struct xpc_channel *ch,
unsigned long msgqueue_pa)
{
@@ -798,11 +999,358 @@
return 0;
}
-static struct xpc_msg *
-xpc_get_deliverable_msg_uv(struct xpc_channel *ch)
+static enum xp_retval
+xpc_allocate_msg_slot_uv(struct xpc_channel *ch, u32 flags,
+ struct xpc_send_msg_slot_uv **address_of_msg_slot)
{
- /* !!! this function needs fleshing out */
- return NULL;
+ enum xp_retval ret;
+ struct xpc_send_msg_slot_uv *msg_slot;
+ struct xpc_fifo_entry_uv *entry;
+
+ while (1) {
+ entry = xpc_get_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list);
+ if (entry != NULL)
+ break;
+
+ if (flags & XPC_NOWAIT)
+ return xpNoWait;
+
+ ret = xpc_allocate_msg_wait(ch);
+ if (ret != xpInterrupted && ret != xpTimeout)
+ return ret;
+ }
+
+ msg_slot = container_of(entry, struct xpc_send_msg_slot_uv, next);
+ *address_of_msg_slot = msg_slot;
+ return xpSuccess;
+}
+
+static void
+xpc_free_msg_slot_uv(struct xpc_channel *ch,
+ struct xpc_send_msg_slot_uv *msg_slot)
+{
+ xpc_put_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list, &msg_slot->next);
+
+ /* wakeup anyone waiting for a free msg slot */
+ if (atomic_read(&ch->n_on_msg_allocate_wq) > 0)
+ wake_up(&ch->msg_allocate_wq);
+}
+
+static void
+xpc_notify_sender_uv(struct xpc_channel *ch,
+ struct xpc_send_msg_slot_uv *msg_slot,
+ enum xp_retval reason)
+{
+ xpc_notify_func func = msg_slot->func;
+
+ if (func != NULL && cmpxchg(&msg_slot->func, func, NULL) == func) {
+
+ atomic_dec(&ch->n_to_notify);
+
+ dev_dbg(xpc_chan, "msg_slot->func() called, msg_slot=0x%p "
+ "msg_slot_number=%d partid=%d channel=%d\n", msg_slot,
+ msg_slot->msg_slot_number, ch->partid, ch->number);
+
+ func(reason, ch->partid, ch->number, msg_slot->key);
+
+ dev_dbg(xpc_chan, "msg_slot->func() returned, msg_slot=0x%p "
+ "msg_slot_number=%d partid=%d channel=%d\n", msg_slot,
+ msg_slot->msg_slot_number, ch->partid, ch->number);
+ }
+}
+
+static void
+xpc_handle_notify_mq_ack_uv(struct xpc_channel *ch,
+ struct xpc_notify_mq_msg_uv *msg)
+{
+ struct xpc_send_msg_slot_uv *msg_slot;
+ int entry = msg->hdr.msg_slot_number % ch->local_nentries;
+
+ msg_slot = &ch->sn.uv.send_msg_slots[entry];
+
+ BUG_ON(msg_slot->msg_slot_number != msg->hdr.msg_slot_number);
+ msg_slot->msg_slot_number += ch->local_nentries;
+
+ if (msg_slot->func != NULL)
+ xpc_notify_sender_uv(ch, msg_slot, xpMsgDelivered);
+
+ xpc_free_msg_slot_uv(ch, msg_slot);
+}
+
+static void
+xpc_handle_notify_mq_msg_uv(struct xpc_partition *part,
+ struct xpc_notify_mq_msg_uv *msg)
+{
+ struct xpc_partition_uv *part_uv = &part->sn.uv;
+ struct xpc_channel *ch;
+ struct xpc_channel_uv *ch_uv;
+ struct xpc_notify_mq_msg_uv *msg_slot;
+ unsigned long irq_flags;
+ int ch_number = msg->hdr.ch_number;
+
+ if (unlikely(ch_number >= part->nchannels)) {
+ dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received invalid "
+ "channel number=0x%x in message from partid=%d\n",
+ ch_number, XPC_PARTID(part));
+
+ /* get hb checker to deactivate from the remote partition */
+ spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+ if (part_uv->act_state_req == 0)
+ xpc_activate_IRQ_rcvd++;
+ part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV;
+ part_uv->reason = xpBadChannelNumber;
+ spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags);
+
+ wake_up_interruptible(&xpc_activate_IRQ_wq);
+ return;
+ }
+
+ ch = &part->channels[ch_number];
+ xpc_msgqueue_ref(ch);
+
+ if (!(ch->flags & XPC_C_CONNECTED)) {
+ xpc_msgqueue_deref(ch);
+ return;
+ }
+
+ /* see if we're really dealing with an ACK for a previously sent msg */
+ if (msg->hdr.size == 0) {
+ xpc_handle_notify_mq_ack_uv(ch, msg);
+ xpc_msgqueue_deref(ch);
+ return;
+ }
+
+ /* we're dealing with a normal message sent via the notify_mq */
+ ch_uv = &ch->sn.uv;
+
+ msg_slot = (struct xpc_notify_mq_msg_uv *)((u64)ch_uv->recv_msg_slots +
+ (msg->hdr.msg_slot_number % ch->remote_nentries) *
+ ch->entry_size);
+
+ BUG_ON(msg->hdr.msg_slot_number != msg_slot->hdr.msg_slot_number);
+ BUG_ON(msg_slot->hdr.size != 0);
+
+ memcpy(msg_slot, msg, msg->hdr.size);
+
+ xpc_put_fifo_entry_uv(&ch_uv->recv_msg_list, &msg_slot->hdr.u.next);
+
+ if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) {
+ /*
+ * If there is an existing idle kthread get it to deliver
+ * the payload, otherwise we'll have to get the channel mgr
+ * for this partition to create a kthread to do the delivery.
+ */
+ if (atomic_read(&ch->kthreads_idle) > 0)
+ wake_up_nr(&ch->idle_wq, 1);
+ else
+ xpc_send_chctl_local_msgrequest_uv(part, ch->number);
+ }
+ xpc_msgqueue_deref(ch);
+}
+
+static irqreturn_t
+xpc_handle_notify_IRQ_uv(int irq, void *dev_id)
+{
+ struct xpc_notify_mq_msg_uv *msg;
+ short partid;
+ struct xpc_partition *part;
+
+ while ((msg = gru_get_next_message(xpc_notify_mq_uv)) != NULL) {
+
+ partid = msg->hdr.partid;
+ if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) {
+ dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received "
+ "invalid partid=0x%x in message\n", partid);
+ } else {
+ part = &xpc_partitions[partid];
+
+ if (xpc_part_ref(part)) {
+ xpc_handle_notify_mq_msg_uv(part, msg);
+ xpc_part_deref(part);
+ }
+ }
+
+ gru_free_message(xpc_notify_mq_uv, msg);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int
+xpc_n_of_deliverable_payloads_uv(struct xpc_channel *ch)
+{
+ return xpc_n_of_fifo_entries_uv(&ch->sn.uv.recv_msg_list);
+}
+
+static void
+xpc_process_msg_chctl_flags_uv(struct xpc_partition *part, int ch_number)
+{
+ struct xpc_channel *ch = &part->channels[ch_number];
+ int ndeliverable_payloads;
+
+ xpc_msgqueue_ref(ch);
+
+ ndeliverable_payloads = xpc_n_of_deliverable_payloads_uv(ch);
+
+ if (ndeliverable_payloads > 0 &&
+ (ch->flags & XPC_C_CONNECTED) &&
+ (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)) {
+
+ xpc_activate_kthreads(ch, ndeliverable_payloads);
+ }
+
+ xpc_msgqueue_deref(ch);
+}
+
+static enum xp_retval
+xpc_send_payload_uv(struct xpc_channel *ch, u32 flags, void *payload,
+ u16 payload_size, u8 notify_type, xpc_notify_func func,
+ void *key)
+{
+ enum xp_retval ret = xpSuccess;
+ struct xpc_send_msg_slot_uv *msg_slot = NULL;
+ struct xpc_notify_mq_msg_uv *msg;
+ u8 msg_buffer[XPC_NOTIFY_MSG_SIZE_UV];
+ size_t msg_size;
+
+ DBUG_ON(notify_type != XPC_N_CALL);
+
+ msg_size = sizeof(struct xpc_notify_mq_msghdr_uv) + payload_size;
+ if (msg_size > ch->entry_size)
+ return xpPayloadTooBig;
+
+ xpc_msgqueue_ref(ch);
+
+ if (ch->flags & XPC_C_DISCONNECTING) {
+ ret = ch->reason;
+ goto out_1;
+ }
+ if (!(ch->flags & XPC_C_CONNECTED)) {
+ ret = xpNotConnected;
+ goto out_1;
+ }
+
+ ret = xpc_allocate_msg_slot_uv(ch, flags, &msg_slot);
+ if (ret != xpSuccess)
+ goto out_1;
+
+ if (func != NULL) {
+ atomic_inc(&ch->n_to_notify);
+
+ msg_slot->key = key;
+ wmb(); /* a non-NULL func must hit memory after the key */
+ msg_slot->func = func;
+
+ if (ch->flags & XPC_C_DISCONNECTING) {
+ ret = ch->reason;
+ goto out_2;
+ }
+ }
+
+ msg = (struct xpc_notify_mq_msg_uv *)&msg_buffer;
+ msg->hdr.partid = xp_partition_id;
+ msg->hdr.ch_number = ch->number;
+ msg->hdr.size = msg_size;
+ msg->hdr.msg_slot_number = msg_slot->msg_slot_number;
+ memcpy(&msg->payload, payload, payload_size);
+
+ ret = xpc_send_gru_msg(ch->sn.uv.remote_notify_mq_gpa, msg, msg_size);
+ if (ret == xpSuccess)
+ goto out_1;
+
+ XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret);
+out_2:
+ if (func != NULL) {
+ /*
+ * Try to NULL the msg_slot's func field. If we fail, then
+ * xpc_notify_senders_of_disconnect_uv() beat us to it, in which
+ * case we need to pretend we succeeded to send the message
+ * since the user will get a callout for the disconnect error
+ * by xpc_notify_senders_of_disconnect_uv(), and to also get an
+ * error returned here will confuse them. Additionally, since
+ * in this case the channel is being disconnected we don't need
+ * to put the the msg_slot back on the free list.
+ */
+ if (cmpxchg(&msg_slot->func, func, NULL) != func) {
+ ret = xpSuccess;
+ goto out_1;
+ }
+
+ msg_slot->key = NULL;
+ atomic_dec(&ch->n_to_notify);
+ }
+ xpc_free_msg_slot_uv(ch, msg_slot);
+out_1:
+ xpc_msgqueue_deref(ch);
+ return ret;
+}
+
+/*
+ * Tell the callers of xpc_send_notify() that the status of their payloads
+ * is unknown because the channel is now disconnecting.
+ *
+ * We don't worry about putting these msg_slots on the free list since the
+ * msg_slots themselves are about to be kfree'd.
+ */
+static void
+xpc_notify_senders_of_disconnect_uv(struct xpc_channel *ch)
+{
+ struct xpc_send_msg_slot_uv *msg_slot;
+ int entry;
+
+ DBUG_ON(!(ch->flags & XPC_C_DISCONNECTING));
+
+ for (entry = 0; entry < ch->local_nentries; entry++) {
+
+ if (atomic_read(&ch->n_to_notify) == 0)
+ break;
+
+ msg_slot = &ch->sn.uv.send_msg_slots[entry];
+ if (msg_slot->func != NULL)
+ xpc_notify_sender_uv(ch, msg_slot, ch->reason);
+ }
+}
+
+/*
+ * Get the next deliverable message's payload.
+ */
+static void *
+xpc_get_deliverable_payload_uv(struct xpc_channel *ch)
+{
+ struct xpc_fifo_entry_uv *entry;
+ struct xpc_notify_mq_msg_uv *msg;
+ void *payload = NULL;
+
+ if (!(ch->flags & XPC_C_DISCONNECTING)) {
+ entry = xpc_get_fifo_entry_uv(&ch->sn.uv.recv_msg_list);
+ if (entry != NULL) {
+ msg = container_of(entry, struct xpc_notify_mq_msg_uv,
+ hdr.u.next);
+ payload = &msg->payload;
+ }
+ }
+ return payload;
+}
+
+static void
+xpc_received_payload_uv(struct xpc_channel *ch, void *payload)
+{
+ struct xpc_notify_mq_msg_uv *msg;
+ enum xp_retval ret;
+
+ msg = container_of(payload, struct xpc_notify_mq_msg_uv, payload);
+
+ /* return an ACK to the sender of this message */
+
+ msg->hdr.partid = xp_partition_id;
+ msg->hdr.size = 0; /* size of zero indicates this is an ACK */
+
+ ret = xpc_send_gru_msg(ch->sn.uv.remote_notify_mq_gpa, msg,
+ sizeof(struct xpc_notify_mq_msghdr_uv));
+ if (ret != xpSuccess)
+ XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret);
+
+ msg->hdr.msg_slot_number += ch->remote_nentries;
}
int
@@ -824,6 +1372,8 @@
xpc_request_partition_reactivation_uv;
xpc_request_partition_deactivation =
xpc_request_partition_deactivation_uv;
+ xpc_cancel_partition_deactivation_request =
+ xpc_cancel_partition_deactivation_request_uv;
xpc_setup_ch_structures_sn = xpc_setup_ch_structures_sn_uv;
xpc_teardown_ch_structures_sn = xpc_teardown_ch_structures_sn_uv;
@@ -848,7 +1398,18 @@
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;
+ xpc_n_of_deliverable_payloads = xpc_n_of_deliverable_payloads_uv;
+ xpc_process_msg_chctl_flags = xpc_process_msg_chctl_flags_uv;
+ xpc_send_payload = xpc_send_payload_uv;
+ xpc_notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_uv;
+ xpc_get_deliverable_payload = xpc_get_deliverable_payload_uv;
+ xpc_received_payload = xpc_received_payload_uv;
+
+ if (sizeof(struct xpc_notify_mq_msghdr_uv) > XPC_MSG_HDR_MAX_SIZE) {
+ dev_err(xpc_part, "xpc_notify_mq_msghdr_uv is larger than %d\n",
+ XPC_MSG_HDR_MAX_SIZE);
+ return -E2BIG;
+ }
/* ??? The cpuid argument's value is 0, is that what we want? */
/* !!! The irq argument's value isn't correct. */
@@ -857,6 +1418,17 @@
if (xpc_activate_mq_uv == NULL)
return -ENOMEM;
+ /* ??? The cpuid argument's value is 0, is that what we want? */
+ /* !!! The irq argument's value isn't correct. */
+ xpc_notify_mq_uv = xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, 0, 0,
+ xpc_handle_notify_IRQ_uv);
+ if (xpc_notify_mq_uv == NULL) {
+ /* !!! The irq argument's value isn't correct. */
+ xpc_destroy_gru_mq_uv(xpc_activate_mq_uv,
+ XPC_ACTIVATE_MQ_SIZE_UV, 0);
+ return -ENOMEM;
+ }
+
return 0;
}
@@ -864,5 +1436,8 @@
xpc_exit_uv(void)
{
/* !!! The irq argument's value isn't correct. */
+ xpc_destroy_gru_mq_uv(xpc_notify_mq_uv, XPC_NOTIFY_MQ_SIZE_UV, 0);
+
+ /* !!! The irq argument's value isn't correct. */
xpc_destroy_gru_mq_uv(xpc_activate_mq_uv, XPC_ACTIVATE_MQ_SIZE_UV, 0);
}