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2024-05-13 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e 
 kernel/drivers/misc/sgi-xp/xpc.h
....@@ -71,14 +71,10 @@
7171  *     'SAL_nasids_size'. (Local partition's mask pointers are xpc_part_nasids
7272  *     and xpc_mach_nasids.)
7373  *
74
- *   vars	(ia64-sn2 only)
75
- *   vars part	(ia64-sn2 only)
76
- *
7774  *     Immediately following the mach_nasids mask are the XPC variables
7875  *     required by other partitions. First are those that are generic to all
7976  *     partitions (vars), followed on the next available cacheline by those
8077  *     which are partition specific (vars part). These are setup by XPC.
81
- *     (Local partition's vars pointers are xpc_vars and xpc_vars_part.)
8278  *
8379  * Note: Until 'ts_jiffies' is set non-zero, the partition XPC code has not been
8480  *       initialized.
....@@ -93,9 +89,6 @@
9389 	unsigned long ts_jiffies; /* timestamp when rsvd pg was setup by XPC */
9490 	union {
9591 		struct {
96
-			unsigned long vars_pa;	/* phys addr */
97
-		} sn2;
98
-		struct {
9992 			unsigned long heartbeat_gpa; /* phys addr */
10093 			unsigned long activate_gru_mq_desc_gpa; /* phys addr */
10194 		} uv;
....@@ -106,84 +99,14 @@
10699 
107100 #define XPC_RP_VERSION _XPC_VERSION(3, 0) /* version 3.0 of the reserved page */
108101 
109
-/*
110
- * Define the structures by which XPC variables can be exported to other
111
- * partitions. (There are two: struct xpc_vars and struct xpc_vars_part)
112
- */
113
-
114
-/*
115
- * The following structure describes the partition generic variables
116
- * needed by other partitions in order to properly initialize.
117
- *
118
- * struct xpc_vars version number also applies to struct xpc_vars_part.
119
- * Changes to either structure and/or related functionality should be
120
- * reflected by incrementing either the major or minor version numbers
121
- * of struct xpc_vars.
122
- */
123
-struct xpc_vars_sn2 {
124
-	u8 version;
125
-	u64 heartbeat;
126
-	DECLARE_BITMAP(heartbeating_to_mask, XP_MAX_NPARTITIONS_SN2);
127
-	u64 heartbeat_offline;	/* if 0, heartbeat should be changing */
128
-	int activate_IRQ_nasid;
129
-	int activate_IRQ_phys_cpuid;
130
-	unsigned long vars_part_pa;
131
-	unsigned long amos_page_pa;/* paddr of page of amos from MSPEC driver */
132
-	struct amo *amos_page;	/* vaddr of page of amos from MSPEC driver */
133
-};
134
-
135
-#define XPC_V_VERSION _XPC_VERSION(3, 1)    /* version 3.1 of the cross vars */
136
-
137
-/*
138
- * The following structure describes the per partition specific variables.
139
- *
140
- * An array of these structures, one per partition, will be defined. As a
141
- * partition becomes active XPC will copy the array entry corresponding to
142
- * itself from that partition. It is desirable that the size of this structure
143
- * evenly divides into a 128-byte cacheline, such that none of the entries in
144
- * this array crosses a 128-byte cacheline boundary. As it is now, each entry
145
- * occupies 64-bytes.
146
- */
147
-struct xpc_vars_part_sn2 {
148
-	u64 magic;
149
-
150
-	unsigned long openclose_args_pa; /* phys addr of open and close args */
151
-	unsigned long GPs_pa;	/* physical address of Get/Put values */
152
-
153
-	unsigned long chctl_amo_pa; /* physical address of chctl flags' amo */
154
-
155
-	int notify_IRQ_nasid;	/* nasid of where to send notify IRQs */
156
-	int notify_IRQ_phys_cpuid;	/* CPUID of where to send notify IRQs */
157
-
158
-	u8 nchannels;		/* #of defined channels supported */
159
-
160
-	u8 reserved[23];	/* pad to a full 64 bytes */
161
-};
162
-
163
-/*
164
- * The vars_part MAGIC numbers play a part in the first contact protocol.
165
- *
166
- * MAGIC1 indicates that the per partition specific variables for a remote
167
- * partition have been initialized by this partition.
168
- *
169
- * MAGIC2 indicates that this partition has pulled the remote partititions
170
- * per partition variables that pertain to this partition.
171
- */
172
-#define XPC_VP_MAGIC1_SN2 0x0053524156435058L /* 'XPCVARS\0'L (little endian) */
173
-#define XPC_VP_MAGIC2_SN2 0x0073726176435058L /* 'XPCvars\0'L (little endian) */
174
-
175102 /* the reserved page sizes and offsets */
176103 
177104 #define XPC_RP_HEADER_SIZE	L1_CACHE_ALIGN(sizeof(struct xpc_rsvd_page))
178
-#define XPC_RP_VARS_SIZE	L1_CACHE_ALIGN(sizeof(struct xpc_vars_sn2))
179105 
180106 #define XPC_RP_PART_NASIDS(_rp) ((unsigned long *)((u8 *)(_rp) + \
181107 				 XPC_RP_HEADER_SIZE))
182108 #define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + \
183109 				 xpc_nasid_mask_nlongs)
184
-#define XPC_RP_VARS(_rp)	((struct xpc_vars_sn2 *) \
185
-				 (XPC_RP_MACH_NASIDS(_rp) + \
186
-				  xpc_nasid_mask_nlongs))
187110 
188111 
189112 /*
....@@ -298,17 +221,6 @@
298221 #define XPC_UNPACK_ARG2(_args)	((((u64)_args) >> 32) & 0xffffffff)
299222 
300223 /*
301
- * Define a Get/Put value pair (pointers) used with a message queue.
302
- */
303
-struct xpc_gp_sn2 {
304
-	s64 get;		/* Get value */
305
-	s64 put;		/* Put value */
306
-};
307
-
308
-#define XPC_GP_SIZE \
309
-		L1_CACHE_ALIGN(sizeof(struct xpc_gp_sn2) * XPC_MAX_NCHANNELS)
310
-
311
-/*
312224  * Define a structure that contains arguments associated with opening and
313225  * closing a channel.
314226  */
....@@ -341,30 +253,6 @@
341253 };
342254 
343255 /*
344
- * Define a sn2 styled message.
345
- *
346
- * A user-defined message resides in the payload area. The max size of the
347
- * payload is defined by the user via xpc_connect().
348
- *
349
- * The size of a message entry (within a message queue) must be a 128-byte
350
- * cacheline sized multiple in order to facilitate the BTE transfer of messages
351
- * from one message queue to another.
352
- */
353
-struct xpc_msg_sn2 {
354
-	u8 flags;		/* FOR XPC INTERNAL USE ONLY */
355
-	u8 reserved[7];		/* FOR XPC INTERNAL USE ONLY */
356
-	s64 number;		/* FOR XPC INTERNAL USE ONLY */
357
-
358
-	u64 payload;		/* user defined portion of message */
359
-};
360
-
361
-/* struct xpc_msg_sn2 flags */
362
-
363
-#define	XPC_M_SN2_DONE		0x01	/* msg has been received/consumed */
364
-#define	XPC_M_SN2_READY		0x02	/* msg is ready to be sent */
365
-#define	XPC_M_SN2_INTERRUPT	0x04	/* send interrupt when msg consumed */
366
-
367
-/*
368256  * The format of a uv XPC notify_mq GRU message is as follows:
369257  *
370258  * A user-defined message resides in the payload area. The max size of the
....@@ -388,20 +276,6 @@
388276 struct xpc_notify_mq_msg_uv {
389277 	struct xpc_notify_mq_msghdr_uv hdr;
390278 	unsigned long payload;
391
-};
392
-
393
-/*
394
- * Define sn2's notify entry.
395
- *
396
- * This is used to notify a message's sender that their message was received
397
- * and consumed by the intended recipient.
398
- */
399
-struct xpc_notify_sn2 {
400
-	u8 type;		/* type of notification */
401
-
402
-	/* the following two fields are only used if type == XPC_N_CALL */
403
-	xpc_notify_func func;	/* user's notify function */
404
-	void *key;		/* pointer to user's key */
405279 };
406280 
407281 /* struct xpc_notify_sn2 type of notification */
....@@ -430,102 +304,6 @@
430304  * allocated at the time a partition becomes active. The array contains one
431305  * of these structures for each potential channel connection to that partition.
432306  */
433
-
434
-/*
435
- * The following is sn2 only.
436
- *
437
- * Each channel structure manages two message queues (circular buffers).
438
- * They are allocated at the time a channel connection is made. One of
439
- * these message queues (local_msgqueue) holds the locally created messages
440
- * that are destined for the remote partition. The other of these message
441
- * queues (remote_msgqueue) is a locally cached copy of the remote partition's
442
- * own local_msgqueue.
443
- *
444
- * The following is a description of the Get/Put pointers used to manage these
445
- * two message queues. Consider the local_msgqueue to be on one partition
446
- * and the remote_msgqueue to be its cached copy on another partition. A
447
- * description of what each of the lettered areas contains is included.
448
- *
449
- *
450
- *                     local_msgqueue      remote_msgqueue
451
- *
452
- *                        |/////////|      |/////////|
453
- *    w_remote_GP.get --> +---------+      |/////////|
454
- *                        |    F    |      |/////////|
455
- *     remote_GP.get  --> +---------+      +---------+ <-- local_GP->get
456
- *                        |         |      |         |
457
- *                        |         |      |    E    |
458
- *                        |         |      |         |
459
- *                        |         |      +---------+ <-- w_local_GP.get
460
- *                        |    B    |      |/////////|
461
- *                        |         |      |////D////|
462
- *                        |         |      |/////////|
463
- *                        |         |      +---------+ <-- w_remote_GP.put
464
- *                        |         |      |////C////|
465
- *      local_GP->put --> +---------+      +---------+ <-- remote_GP.put
466
- *                        |         |      |/////////|
467
- *                        |    A    |      |/////////|
468
- *                        |         |      |/////////|
469
- *     w_local_GP.put --> +---------+      |/////////|
470
- *                        |/////////|      |/////////|
471
- *
472
- *
473
- *	    ( remote_GP.[get|put] are cached copies of the remote
474
- *	      partition's local_GP->[get|put], and thus their values can
475
- *	      lag behind their counterparts on the remote partition. )
476
- *
477
- *
478
- *  A - Messages that have been allocated, but have not yet been sent to the
479
- *	remote partition.
480
- *
481
- *  B - Messages that have been sent, but have not yet been acknowledged by the
482
- *      remote partition as having been received.
483
- *
484
- *  C - Area that needs to be prepared for the copying of sent messages, by
485
- *	the clearing of the message flags of any previously received messages.
486
- *
487
- *  D - Area into which sent messages are to be copied from the remote
488
- *	partition's local_msgqueue and then delivered to their intended
489
- *	recipients. [ To allow for a multi-message copy, another pointer
490
- *	(next_msg_to_pull) has been added to keep track of the next message
491
- *	number needing to be copied (pulled). It chases after w_remote_GP.put.
492
- *	Any messages lying between w_local_GP.get and next_msg_to_pull have
493
- *	been copied and are ready to be delivered. ]
494
- *
495
- *  E - Messages that have been copied and delivered, but have not yet been
496
- *	acknowledged by the recipient as having been received.
497
- *
498
- *  F - Messages that have been acknowledged, but XPC has not yet notified the
499
- *	sender that the message was received by its intended recipient.
500
- *	This is also an area that needs to be prepared for the allocating of
501
- *	new messages, by the clearing of the message flags of the acknowledged
502
- *	messages.
503
- */
504
-
505
-struct xpc_channel_sn2 {
506
-	struct xpc_openclose_args *local_openclose_args; /* args passed on */
507
-					     /* opening or closing of channel */
508
-
509
-	void *local_msgqueue_base;	/* base address of kmalloc'd space */
510
-	struct xpc_msg_sn2 *local_msgqueue;	/* local message queue */
511
-	void *remote_msgqueue_base;	/* base address of kmalloc'd space */
512
-	struct xpc_msg_sn2 *remote_msgqueue; /* cached copy of remote */
513
-					   /* partition's local message queue */
514
-	unsigned long remote_msgqueue_pa; /* phys addr of remote partition's */
515
-					  /* local message queue */
516
-
517
-	struct xpc_notify_sn2 *notify_queue;/* notify queue for messages sent */
518
-
519
-	/* various flavors of local and remote Get/Put values */
520
-
521
-	struct xpc_gp_sn2 *local_GP;	/* local Get/Put values */
522
-	struct xpc_gp_sn2 remote_GP;	/* remote Get/Put values */
523
-	struct xpc_gp_sn2 w_local_GP;	/* working local Get/Put values */
524
-	struct xpc_gp_sn2 w_remote_GP;	/* working remote Get/Put values */
525
-	s64 next_msg_to_pull;	/* Put value of next msg to pull */
526
-
527
-	struct mutex msg_to_pull_mutex;	/* next msg to pull serialization */
528
-};
529307 
530308 struct xpc_channel_uv {
531309 	void *cached_notify_gru_mq_desc; /* remote partition's notify mq's */
....@@ -579,7 +357,6 @@
579357 	wait_queue_head_t idle_wq;	/* idle kthread wait queue */
580358 
581359 	union {
582
-		struct xpc_channel_sn2 sn2;
583360 		struct xpc_channel_uv uv;
584361 	} sn;
585362 
....@@ -666,43 +443,6 @@
666443 	return 0;
667444 }
668445 
669
-/*
670
- * Manage channels on a partition basis. There is one of these structures
671
- * for each partition (a partition will never utilize the structure that
672
- * represents itself).
673
- */
674
-
675
-struct xpc_partition_sn2 {
676
-	unsigned long remote_amos_page_pa; /* paddr of partition's amos page */
677
-	int activate_IRQ_nasid;	/* active partition's act/deact nasid */
678
-	int activate_IRQ_phys_cpuid;	/* active part's act/deact phys cpuid */
679
-
680
-	unsigned long remote_vars_pa;	/* phys addr of partition's vars */
681
-	unsigned long remote_vars_part_pa; /* paddr of partition's vars part */
682
-	u8 remote_vars_version;	/* version# of partition's vars */
683
-
684
-	void *local_GPs_base;	/* base address of kmalloc'd space */
685
-	struct xpc_gp_sn2 *local_GPs;	/* local Get/Put values */
686
-	void *remote_GPs_base;	/* base address of kmalloc'd space */
687
-	struct xpc_gp_sn2 *remote_GPs;	/* copy of remote partition's local */
688
-					/* Get/Put values */
689
-	unsigned long remote_GPs_pa; /* phys addr of remote partition's local */
690
-				     /* Get/Put values */
691
-
692
-	void *local_openclose_args_base;   /* base address of kmalloc'd space */
693
-	struct xpc_openclose_args *local_openclose_args;      /* local's args */
694
-	unsigned long remote_openclose_args_pa;	/* phys addr of remote's args */
695
-
696
-	int notify_IRQ_nasid;	/* nasid of where to send notify IRQs */
697
-	int notify_IRQ_phys_cpuid;	/* CPUID of where to send notify IRQs */
698
-	char notify_IRQ_owner[8];	/* notify IRQ's owner's name */
699
-
700
-	struct amo *remote_chctl_amo_va; /* addr of remote chctl flags' amo */
701
-	struct amo *local_chctl_amo_va;	/* address of chctl flags' amo */
702
-
703
-	struct timer_list dropped_notify_IRQ_timer;	/* dropped IRQ timer */
704
-};
705
-
706446 struct xpc_partition_uv {
707447 	unsigned long heartbeat_gpa; /* phys addr of partition's heartbeat */
708448 	struct xpc_heartbeat_uv cached_heartbeat; /* cached copy of */
....@@ -774,7 +514,6 @@
774514 	wait_queue_head_t channel_mgr_wq;	/* channel mgr's wait queue */
775515 
776516 	union {
777
-		struct xpc_partition_sn2 sn2;
778517 		struct xpc_partition_uv uv;
779518 	} sn;
780519 
....@@ -854,14 +593,6 @@
854593 #define XPC_P_SS_WTEARDOWN	0x02	/* waiting to teardown infrastructure */
855594 #define XPC_P_SS_TORNDOWN	0x03	/* infrastructure is torndown */
856595 
857
-/*
858
- * struct xpc_partition_sn2's dropped notify IRQ timer is set to wait the
859
- * following interval #of seconds before checking for dropped notify IRQs.
860
- * These can occur whenever an IRQ's associated amo write doesn't complete
861
- * until after the IRQ was received.
862
- */
863
-#define XPC_DROPPED_NOTIFY_IRQ_WAIT_INTERVAL	(0.25 * HZ)
864
-
865596 /* number of seconds to wait for other partitions to disengage */
866597 #define XPC_DISENGAGE_DEFAULT_TIMELIMIT		90
867598 
....@@ -887,10 +618,6 @@
887618 extern void xpc_activate_kthreads(struct xpc_channel *, int);
888619 extern void xpc_create_kthreads(struct xpc_channel *, int, int);
889620 extern void xpc_disconnect_wait(int);
890
-
891
-/* found in xpc_sn2.c */
892
-extern int xpc_init_sn2(void);
893
-extern void xpc_exit_sn2(void);
894621 
895622 /* found in xpc_uv.c */
896623 extern int xpc_init_uv(void);