sgi-xp: isolate additional sn2 specific code

Move additional sn2 specific code into xpc_sn2.c.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 97 insertions, 76 deletions

diff --git a/drivers/misc/sgi-xp/xpc.h b/drivers/misc/sgi-xp/xpc.h
index 1edf37512de6..b04cfbed9581 100644
--- a/drivers/misc/sgi-xp/xpc.h
+++ b/drivers/misc/sgi-xp/xpc.h
@@ -122,9 +122,6 @@ struct xpc_rsvd_page {
 
 #define XPC_RP_VERSION _XPC_VERSION(2, 0) /* version 2.0 of the reserved page */
 
-#define XPC_SUPPORTS_RP_STAMP(_version) \
-			(_version >= _XPC_VERSION(1, 1))
-
 /*
  * Define the structures by which XPC variables can be exported to other
  * partitions. (There are two: struct xpc_vars and struct xpc_vars_part)
@@ -144,8 +141,8 @@ struct xpc_vars_sn2 {
 	u64 heartbeat;
 	DECLARE_BITMAP(heartbeating_to_mask, XP_MAX_NPARTITIONS_SN2);
 	u64 heartbeat_offline;	/* if 0, heartbeat should be changing */
-	int act_nasid;
-	int act_phys_cpuid;
+	int activate_IRQ_nasid;
+	int activate_IRQ_phys_cpuid;
 	u64 vars_part_pa;
 	u64 amos_page_pa;	/* paddr of page of AMOs from MSPEC driver */
 	AMO_t *amos_page;	/* vaddr of page of AMOs from MSPEC driver */
@@ -153,9 +150,6 @@ struct xpc_vars_sn2 {
 
 #define XPC_V_VERSION _XPC_VERSION(3, 1)    /* version 3.1 of the cross vars */
 
-#define XPC_SUPPORTS_DISENGAGE_REQUEST(_version) \
-			(_version >= _XPC_VERSION(3, 1))
-
 /*
  * The following pertains to ia64-sn2 only.
  *
@@ -167,14 +161,14 @@ struct xpc_vars_sn2 {
  * a PI FSB Protocol error to be generated by the SHUB. For XPC, we need 64
  * AMO variables (based on XP_MAX_NPARTITIONS_SN2) to identify the senders of
  * NOTIFY IRQs, 128 AMO variables (based on XP_NASID_MASK_WORDS) to identify
- * the senders of ACTIVATE IRQs, and 2 AMO variables to identify which remote
+ * the senders of ACTIVATE IRQs, 1 AMO variable to identify which remote
  * partitions (i.e., XPCs) consider themselves currently engaged with the
- * local XPC.
+ * local XPC and 1 AMO variable to request partition deactivation.
  */
 #define XPC_NOTIFY_IRQ_AMOS	0
 #define XPC_ACTIVATE_IRQ_AMOS	(XPC_NOTIFY_IRQ_AMOS + XP_MAX_NPARTITIONS_SN2)
 #define XPC_ENGAGED_PARTITIONS_AMO (XPC_ACTIVATE_IRQ_AMOS + XP_NASID_MASK_WORDS)
-#define XPC_DISENGAGE_REQUEST_AMO  (XPC_ENGAGED_PARTITIONS_AMO + 1)
+#define XPC_DEACTIVATE_REQUEST_AMO  (XPC_ENGAGED_PARTITIONS_AMO + 1)
 
 /*
  * The following structure describes the per partition specific variables.
@@ -369,6 +363,23 @@ struct xpc_notify {
  *	new messages, by the clearing of the message flags of the acknowledged
  *	messages.
  */
+struct xpc_channel_sn2 {
+
+	/* various flavors of local and remote Get/Put values */
+
+	struct xpc_gp *local_GP;	/* local Get/Put values */
+	struct xpc_gp remote_GP;	/* remote Get/Put values */
+	struct xpc_gp w_local_GP;	/* working local Get/Put values */
+	struct xpc_gp w_remote_GP;	/* working remote Get/Put values */
+	s64 next_msg_to_pull;	/* Put value of next msg to pull */
+
+	struct mutex msg_to_pull_mutex;	/* next msg to pull serialization */
+};
+
+struct xpc_channel_uv {
+	/* >>> code is coming */
+};
+
 struct xpc_channel {
 	short partid;		/* ID of remote partition connected */
 	spinlock_t lock;	/* lock for updating this structure */
@@ -407,20 +418,11 @@ struct xpc_channel {
 	xpc_channel_func func;	/* user's channel function */
 	void *key;		/* pointer to user's key */
 
-	struct mutex msg_to_pull_mutex;	/* next msg to pull serialization */
 	struct completion wdisconnect_wait;    /* wait for channel disconnect */
 
 	struct xpc_openclose_args *local_openclose_args; /* args passed on */
 					     /* opening or closing of channel */
 
-	/* various flavors of local and remote Get/Put values */
-
-	struct xpc_gp *local_GP;	/* local Get/Put values */
-	struct xpc_gp remote_GP;	/* remote Get/Put values */
-	struct xpc_gp w_local_GP;	/* working local Get/Put values */
-	struct xpc_gp w_remote_GP;	/* working remote Get/Put values */
-	s64 next_msg_to_pull;	/* Put value of next msg to pull */
-
 	/* kthread management related fields */
 
 	atomic_t kthreads_assigned;	/* #of kthreads assigned to channel */
@@ -431,6 +433,11 @@ struct xpc_channel {
 
 	wait_queue_head_t idle_wq;	/* idle kthread wait queue */
 
+	union {
+		struct xpc_channel_sn2 sn2;
+		struct xpc_channel_uv uv;
+	} sn;
+
 } ____cacheline_aligned;
 
 /* struct xpc_channel flags */
@@ -467,6 +474,40 @@ struct xpc_channel {
  * for each partition (a partition will never utilize the structure that
  * represents itself).
  */
+
+struct xpc_partition_sn2 {
+	u64 remote_amos_page_pa;	/* phys addr of partition's amos page */
+	int activate_IRQ_nasid;	/* active partition's act/deact nasid */
+	int activate_IRQ_phys_cpuid;	/* active part's act/deact phys cpuid */
+
+	u64 remote_vars_pa;	/* phys addr of partition's vars */
+	u64 remote_vars_part_pa;	/* phys addr of partition's vars part */
+	u8 remote_vars_version;	/* version# of partition's vars */
+
+	void *local_GPs_base;	/* base address of kmalloc'd space */
+	struct xpc_gp *local_GPs;	/* local Get/Put values */
+	void *remote_GPs_base;	/* base address of kmalloc'd space */
+	struct xpc_gp *remote_GPs;	/* copy of remote partition's local */
+					/* Get/Put values */
+	u64 remote_GPs_pa;	/* phys address of remote partition's local */
+				/* Get/Put values */
+
+	u64 remote_openclose_args_pa;	/* phys addr of remote's args */
+
+	int remote_IPI_nasid;	/* nasid of where to send IPIs */
+	int remote_IPI_phys_cpuid;	/* phys CPU ID of where to send IPIs */
+	char IPI_owner[8];	/* IPI owner's name */
+
+	AMO_t *remote_IPI_amo_va;    /* address of remote IPI AMO_t structure */
+	AMO_t *local_IPI_amo_va;	/* address of IPI AMO_t structure */
+
+	struct timer_list dropped_notify_IRQ_timer;	/* dropped IRQ timer */
+};
+
+struct xpc_partition_uv {
+	/* >>> code is coming */
+};
+
 struct xpc_partition {
 
 	/* XPC HB infrastructure */
@@ -474,22 +515,15 @@ struct xpc_partition {
 	u8 remote_rp_version;	/* version# of partition's rsvd pg */
 	unsigned long remote_rp_stamp; /* time when rsvd pg was initialized */
 	u64 remote_rp_pa;	/* phys addr of partition's rsvd pg */
-	u64 remote_vars_pa;	/* phys addr of partition's vars */
-	u64 remote_vars_part_pa;	/* phys addr of partition's vars part */
 	u64 last_heartbeat;	/* HB at last read */
-	u64 remote_amos_page_pa;	/* phys addr of partition's amos page */
-	int remote_act_nasid;	/* active part's act/deact nasid */
-	int remote_act_phys_cpuid;	/* active part's act/deact phys cpuid */
 	u32 activate_IRQ_rcvd;	/* IRQs since activation */
 	spinlock_t act_lock;	/* protect updating of act_state */
 	u8 act_state;		/* from XPC HB viewpoint */
-	u8 remote_vars_version;	/* version# of partition's vars */
 	enum xp_retval reason;	/* reason partition is deactivating */
 	int reason_line;	/* line# deactivation initiated from */
-	int reactivate_nasid;	/* nasid in partition to reactivate */
 
-	unsigned long disengage_request_timeout;	/* timeout in jiffies */
-	struct timer_list disengage_request_timer;
+	unsigned long disengage_timeout;	/* timeout in jiffies */
+	struct timer_list disengage_timer;
 
 	/* XPC infrastructure referencing and teardown control */
 
@@ -502,14 +536,6 @@ struct xpc_partition {
 	atomic_t nchannels_engaged;  /* #of channels engaged with remote part */
 	struct xpc_channel *channels;	/* array of channel structures */
 
-	void *local_GPs_base;	/* base address of kmalloc'd space */
-	struct xpc_gp *local_GPs;	/* local Get/Put values */
-	void *remote_GPs_base;	/* base address of kmalloc'd space */
-	struct xpc_gp *remote_GPs;	/* copy of remote partition's local */
-					/* Get/Put values */
-	u64 remote_GPs_pa;	/* phys address of remote partition's local */
-				/* Get/Put values */
-
 	/* fields used to pass args when opening or closing a channel */
 
 	void *local_openclose_args_base;   /* base address of kmalloc'd space */
@@ -517,19 +543,10 @@ struct xpc_partition {
 	void *remote_openclose_args_base;  /* base address of kmalloc'd space */
 	struct xpc_openclose_args *remote_openclose_args; /* copy of remote's */
 							  /* args */
-	u64 remote_openclose_args_pa;	/* phys addr of remote's args */
 
 	/* IPI sending, receiving and handling related fields */
 
-	int remote_IPI_nasid;	/* nasid of where to send IPIs */
-	int remote_IPI_phys_cpuid;	/* phys CPU ID of where to send IPIs */
-	AMO_t *remote_IPI_amo_va;    /* address of remote IPI AMO_t structure */
-
-	AMO_t *local_IPI_amo_va;	/* address of IPI AMO_t structure */
 	u64 local_IPI_amo;	/* IPI amo flags yet to be handled */
-	char IPI_owner[8];	/* IPI owner's name */
-	struct timer_list dropped_IPI_timer;	/* dropped IPI timer */
-
 	spinlock_t IPI_lock;	/* IPI handler lock */
 
 	/* channel manager related fields */
@@ -537,6 +554,11 @@ struct xpc_partition {
 	atomic_t channel_mgr_requests;	/* #of requests to activate chan mgr */
 	wait_queue_head_t channel_mgr_wq;	/* channel mgr's wait queue */
 
+	union {
+		struct xpc_partition_sn2 sn2;
+		struct xpc_partition_uv uv;
+	} sn;
+
 } ____cacheline_aligned;
 
 /* struct xpc_partition act_state values (for XPC HB) */
@@ -565,10 +587,10 @@ struct xpc_partition {
 #define XPC_P_DROPPED_IPI_WAIT_INTERVAL	(0.25 * HZ)
 
 /* number of seconds to wait for other partitions to disengage */
-#define XPC_DISENGAGE_REQUEST_DEFAULT_TIMELIMIT	90
+#define XPC_DISENGAGE_DEFAULT_TIMELIMIT		90
 
-/* interval in seconds to print 'waiting disengagement' messages */
-#define XPC_DISENGAGE_PRINTMSG_INTERVAL		10
+/* interval in seconds to print 'waiting deactivation' messages */
+#define XPC_DEACTIVATE_PRINTMSG_INTERVAL	10
 
 #define XPC_PARTID(_p)	((short)((_p) - &xpc_partitions[0]))
 
@@ -578,13 +600,11 @@ extern struct xpc_registration xpc_registrations[];
 /* found in xpc_main.c */
 extern struct device *xpc_part;
 extern struct device *xpc_chan;
-extern int xpc_disengage_request_timelimit;
-extern int xpc_disengage_request_timedout;
+extern int xpc_disengage_timelimit;
+extern int xpc_disengage_timedout;
 extern atomic_t xpc_activate_IRQ_rcvd;
 extern wait_queue_head_t xpc_activate_IRQ_wq;
 extern void *xpc_heartbeating_to_mask;
-extern irqreturn_t xpc_notify_IRQ_handler(int, void *);
-extern void xpc_dropped_IPI_check(struct xpc_partition *);
 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);
@@ -598,31 +618,34 @@ extern void (*xpc_online_heartbeat) (void);
 extern void (*xpc_check_remote_hb) (void);
 extern enum xp_retval (*xpc_make_first_contact) (struct xpc_partition *);
 extern u64 (*xpc_get_IPI_flags) (struct xpc_partition *);
+extern void (*xpc_notify_senders_of_disconnect) (struct xpc_channel *);
+extern void (*xpc_process_msg_IPI) (struct xpc_partition *, int);
+extern int (*xpc_n_of_deliverable_msgs) (struct xpc_channel *);
 extern struct xpc_msg *(*xpc_get_deliverable_msg) (struct xpc_channel *);
-extern void (*xpc_initiate_partition_activation) (struct xpc_rsvd_page *, u64,
-						  int);
+extern void (*xpc_request_partition_activation) (struct xpc_rsvd_page *, u64,
+						 int);
+extern void (*xpc_request_partition_reactivation) (struct xpc_partition *);
+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_mark_partition_engaged) (struct xpc_partition *);
-extern void (*xpc_mark_partition_disengaged) (struct xpc_partition *);
-extern void (*xpc_request_partition_disengage) (struct xpc_partition *);
-extern void (*xpc_cancel_partition_disengage_request) (struct xpc_partition *);
-extern u64 (*xpc_partition_engaged) (u64);
-extern u64 (*xpc_partition_disengage_requested) (u64);;
-extern void (*xpc_clear_partition_engaged) (u64);
-extern void (*xpc_clear_partition_disengage_request) (u64);
-
-extern void (*xpc_IPI_send_local_activate) (int);
-extern void (*xpc_IPI_send_activated) (struct xpc_partition *);
-extern void (*xpc_IPI_send_local_reactivate) (int);
-extern void (*xpc_IPI_send_disengage) (struct xpc_partition *);
-
-extern void (*xpc_IPI_send_closerequest) (struct xpc_channel *,
-					  unsigned long *);
-extern void (*xpc_IPI_send_closereply) (struct xpc_channel *, unsigned long *);
-extern void (*xpc_IPI_send_openrequest) (struct xpc_channel *, unsigned long *);
-extern void (*xpc_IPI_send_openreply) (struct xpc_channel *, unsigned long *);
+
+extern void (*xpc_indicate_partition_engaged) (struct xpc_partition *);
+extern int (*xpc_partition_engaged) (short);
+extern int (*xpc_any_partition_engaged) (void);
+extern void (*xpc_indicate_partition_disengaged) (struct xpc_partition *);
+extern void (*xpc_assume_partition_disengaged) (short);
+
+extern void (*xpc_send_channel_closerequest) (struct xpc_channel *,
+					      unsigned long *);
+extern void (*xpc_send_channel_closereply) (struct xpc_channel *,
+					    unsigned long *);
+extern void (*xpc_send_channel_openrequest) (struct xpc_channel *,
+					     unsigned long *);
+extern void (*xpc_send_channel_openreply) (struct xpc_channel *,
+					   unsigned long *);
 
 extern enum xp_retval (*xpc_send_msg) (struct xpc_channel *, u32, void *, u16,
 				       u8, xpc_notify_func, void *);
@@ -646,8 +669,6 @@ extern char *xpc_remote_copy_buffer;
 extern void *xpc_remote_copy_buffer_base;
 extern void *xpc_kmalloc_cacheline_aligned(size_t, gfp_t, void **);
 extern struct xpc_rsvd_page *xpc_setup_rsvd_page(void);
-extern void xpc_allow_IPI_ops(void);
-extern void xpc_restrict_IPI_ops(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 *);