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>
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>

drivers/misc/sgi-xp/xp.h

@@ -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 */
 };
 
 /*

drivers/misc/sgi-xp/xp_uv.c

@@ -42,15 +42,25 @@ xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa,
 	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;
 }

drivers/misc/sgi-xp/xpc_channel.c

@@ -39,7 +39,7 @@ xpc_process_connect(struct xpc_channel *ch, unsigned long *irq_flags)
 
 	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 *ch, unsigned long *irq_flags)
 	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_channel *ch, unsigned long *irq_flags)
 		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 @@ xpc_process_openclose_chctl_flags(struct xpc_partition *part, int ch_number,
 		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 "

drivers/misc/sgi-xp/xpc_partition.c

@@ -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;
 }
 
 /*