x86/platform/uv: Remove UV BAU TLB Shootdown Handler

The Broadcast Assist Unit (BAU) TLB shootdown handler is being rewritten
to become the UV BAU APIC driver. It is designed to speed up sending
IPIs to selective CPUs within the system. Remove the current TLB
shutdown handler (tlb_uv.c) file and a couple of kernel hooks in the
interim.

Signed-off-by: Mike Travis <mike.travis@hpe.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Dimitri Sivanich <dimitri.sivanich@hpe.com>
Link: https://lkml.kernel.org/r/20201005203929.148656-2-mike.travis@hpe.com

3 files changed, 1 insertions, 762 deletions

diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h
index a0638640f1ed..df4dc975e8fd 100644
--- a/arch/x86/include/asm/idtentry.h
+++ b/arch/x86/include/asm/idtentry.h
@@ -591,10 +591,6 @@ DECLARE_IDTENTRY_SYSVEC(CALL_FUNCTION_VECTOR,		sysvec_call_function);
 #endif
 
 #ifdef CONFIG_X86_LOCAL_APIC
-# ifdef CONFIG_X86_UV
-DECLARE_IDTENTRY_SYSVEC(UV_BAU_MESSAGE,			sysvec_uv_bau_message);
-# endif
-
 # ifdef CONFIG_X86_MCE_THRESHOLD
 DECLARE_IDTENTRY_SYSVEC(THRESHOLD_APIC_VECTOR,		sysvec_threshold);
 # endif
diff --git a/arch/x86/include/asm/uv/uv.h b/arch/x86/include/asm/uv/uv.h
index e48aea9ba47d..172d3e4a9e4b 100644
--- a/arch/x86/include/asm/uv/uv.h
+++ b/arch/x86/include/asm/uv/uv.h
@@ -35,10 +35,8 @@ extern int is_uv_hubbed(int uvtype);
 extern void uv_cpu_init(void);
 extern void uv_nmi_init(void);
 extern void uv_system_init(void);
-extern const struct cpumask *uv_flush_tlb_others(const struct cpumask *cpumask,
-						 const struct flush_tlb_info *info);
 
-#else	/* X86_UV */
+#else	/* !X86_UV */
 
 static inline enum uv_system_type get_uv_system_type(void) { return UV_NONE; }
 static inline bool is_early_uv_system(void)	{ return 0; }
diff --git a/arch/x86/include/asm/uv/uv_bau.h b/arch/x86/include/asm/uv/uv_bau.h
deleted file mode 100644
index cd24804955d7..000000000000
--- a/arch/x86/include/asm/uv/uv_bau.h
+++ /dev/null
@@ -1,755 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * SGI UV Broadcast Assist Unit definitions
- *
- * Copyright (C) 2008-2011 Silicon Graphics, Inc. All rights reserved.
- */
-
-#ifndef _ASM_X86_UV_UV_BAU_H
-#define _ASM_X86_UV_UV_BAU_H
-
-#include <linux/bitmap.h>
-#include <asm/idtentry.h>
-
-#define BITSPERBYTE 8
-
-/*
- * Broadcast Assist Unit messaging structures
- *
- * Selective Broadcast activations are induced by software action
- * specifying a particular 8-descriptor "set" via a 6-bit index written
- * to an MMR.
- * Thus there are 64 unique 512-byte sets of SB descriptors - one set for
- * each 6-bit index value. These descriptor sets are mapped in sequence
- * starting with set 0 located at the address specified in the
- * BAU_SB_DESCRIPTOR_BASE register, set 1 is located at BASE + 512,
- * set 2 is at BASE + 2*512, set 3 at BASE + 3*512, and so on.
- *
- * We will use one set for sending BAU messages from each of the
- * cpu's on the uvhub.
- *
- * TLB shootdown will use the first of the 8 descriptors of each set.
- * Each of the descriptors is 64 bytes in size (8*64 = 512 bytes in a set).
- */
-
-#define MAX_CPUS_PER_UVHUB		128
-#define MAX_CPUS_PER_SOCKET		64
-#define ADP_SZ				64 /* hardware-provided max. */
-#define UV_CPUS_PER_AS			32 /* hardware-provided max. */
-#define ITEMS_PER_DESC			8
-/* the 'throttle' to prevent the hardware stay-busy bug */
-#define MAX_BAU_CONCURRENT		3
-#define UV_ACT_STATUS_MASK		0x3
-#define UV_ACT_STATUS_SIZE		2
-#define UV_DISTRIBUTION_SIZE		256
-#define UV_SW_ACK_NPENDING		8
-#define UV_NET_ENDPOINT_INTD		0x28
-#define UV_PAYLOADQ_GNODE_SHIFT		49
-#define UV_PTC_BASENAME			"sgi_uv/ptc_statistics"
-#define UV_BAU_BASENAME			"sgi_uv/bau_tunables"
-#define UV_BAU_TUNABLES_DIR		"sgi_uv"
-#define UV_BAU_TUNABLES_FILE		"bau_tunables"
-#define WHITESPACE			" \t\n"
-#define cpubit_isset(cpu, bau_local_cpumask) \
-	test_bit((cpu), (bau_local_cpumask).bits)
-
-/* [19:16] SOFT_ACK timeout period  19: 1 is urgency 7  17:16 1 is multiplier */
-/*
- * UV2: Bit 19 selects between
- *  (0): 10 microsecond timebase and
- *  (1): 80 microseconds
- *  we're using 560us
- */
-#define UV_INTD_SOFT_ACK_TIMEOUT_PERIOD	(15UL)
-/* assuming UV3 is the same */
-
-#define BAU_MISC_CONTROL_MULT_MASK	3
-
-#define UVH_AGING_PRESCALE_SEL		0x000000b000UL
-/* [30:28] URGENCY_7  an index into a table of times */
-#define BAU_URGENCY_7_SHIFT		28
-#define BAU_URGENCY_7_MASK		7
-
-#define UVH_TRANSACTION_TIMEOUT		0x000000b200UL
-/* [45:40] BAU - BAU transaction timeout select - a multiplier */
-#define BAU_TRANS_SHIFT			40
-#define BAU_TRANS_MASK			0x3f
-
-/*
- * shorten some awkward names
- */
-#define AS_PUSH_SHIFT UVH_LB_BAU_SB_ACTIVATION_CONTROL_PUSH_SHFT
-#define SOFTACK_MSHIFT UVH_LB_BAU_MISC_CONTROL_ENABLE_INTD_SOFT_ACK_MODE_SHFT
-#define SOFTACK_PSHIFT UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT
-#define SOFTACK_TIMEOUT_PERIOD UV_INTD_SOFT_ACK_TIMEOUT_PERIOD
-#define PREFETCH_HINT_SHFT UV3H_LB_BAU_MISC_CONTROL_ENABLE_INTD_PREFETCH_HINT_SHFT
-#define SB_STATUS_SHFT UV3H_LB_BAU_MISC_CONTROL_ENABLE_EXTENDED_SB_STATUS_SHFT
-#define write_gmmr	uv_write_global_mmr64
-#define write_lmmr	uv_write_local_mmr
-#define read_lmmr	uv_read_local_mmr
-#define read_gmmr	uv_read_global_mmr64
-
-/*
- * bits in UVH_LB_BAU_SB_ACTIVATION_STATUS_0/1
- */
-#define DS_IDLE				0
-#define DS_ACTIVE			1
-#define DS_DESTINATION_TIMEOUT		2
-#define DS_SOURCE_TIMEOUT		3
-/*
- * bits put together from HRP_LB_BAU_SB_ACTIVATION_STATUS_0/1/2
- * values 1 and 3 will not occur
- *        Decoded meaning              ERROR  BUSY    AUX ERR
- * -------------------------------     ----   -----   -------
- * IDLE                                 0       0        0
- * BUSY (active)                        0       1        0
- * SW Ack Timeout (destination)         1       0        0
- * SW Ack INTD rejected (strong NACK)   1       0        1
- * Source Side Time Out Detected        1       1        0
- * Destination Side PUT Failed          1       1        1
- */
-#define UV2H_DESC_IDLE			0
-#define UV2H_DESC_BUSY			2
-#define UV2H_DESC_DEST_TIMEOUT		4
-#define UV2H_DESC_DEST_STRONG_NACK	5
-#define UV2H_DESC_SOURCE_TIMEOUT	6
-#define UV2H_DESC_DEST_PUT_ERR		7
-
-/*
- * delay for 'plugged' timeout retries, in microseconds
- */
-#define PLUGGED_DELAY			10
-
-/*
- * threshholds at which to use IPI to free resources
- */
-/* after this # consecutive 'plugged' timeouts, use IPI to release resources */
-#define PLUGSB4RESET			100
-/* after this many consecutive timeouts, use IPI to release resources */
-#define TIMEOUTSB4RESET			1
-/* at this number uses of IPI to release resources, giveup the request */
-#define IPI_RESET_LIMIT			1
-/* after this # consecutive successes, bump up the throttle if it was lowered */
-#define COMPLETE_THRESHOLD		5
-/* after this # of giveups (fall back to kernel IPI's) disable the use of
-   the BAU for a period of time */
-#define GIVEUP_LIMIT			100
-
-#define UV_LB_SUBNODEID			0x10
-
-#define UV_SA_SHFT UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT
-#define UV_SA_MASK UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_MASK
-/* 4 bits of software ack period */
-#define UV2_ACK_MASK			0x7UL
-#define UV2_ACK_UNITS_SHFT		3
-#define UV2_EXT_SHFT UV2H_LB_BAU_MISC_CONTROL_ENABLE_EXTENDED_SB_STATUS_SHFT
-
-/*
- * number of entries in the destination side payload queue
- */
-#define DEST_Q_SIZE			20
-/*
- * number of destination side software ack resources
- */
-#define DEST_NUM_RESOURCES		8
-/*
- * completion statuses for sending a TLB flush message
- */
-#define FLUSH_RETRY_PLUGGED		1
-#define FLUSH_RETRY_TIMEOUT		2
-#define FLUSH_GIVEUP			3
-#define FLUSH_COMPLETE			4
-
-/*
- * tuning the action when the numalink network is extremely delayed
- */
-#define CONGESTED_RESPONSE_US		1000	/* 'long' response time, in
-						   microseconds */
-#define CONGESTED_REPS			10	/* long delays averaged over
-						   this many broadcasts */
-#define DISABLED_PERIOD			10	/* time for the bau to be
-						   disabled, in seconds */
-/* see msg_type: */
-#define MSG_NOOP			0
-#define MSG_REGULAR			1
-#define MSG_RETRY			2
-
-#define BAU_DESC_QUALIFIER		0x534749
-
-enum uv_bau_version {
-	UV_BAU_V2 = 2,
-	UV_BAU_V3,
-	UV_BAU_V4,
-};
-
-/*
- * Distribution: 32 bytes (256 bits) (bytes 0-0x1f of descriptor)
- * If the 'multilevel' flag in the header portion of the descriptor
- * has been set to 0, then endpoint multi-unicast mode is selected.
- * The distribution specification (32 bytes) is interpreted as a 256-bit
- * distribution vector. Adjacent bits correspond to consecutive even numbered
- * nodeIDs. The result of adding the index of a given bit to the 15-bit
- * 'base_dest_nasid' field of the header corresponds to the
- * destination nodeID associated with that specified bit.
- */
-struct pnmask {
-	unsigned long		bits[BITS_TO_LONGS(UV_DISTRIBUTION_SIZE)];
-};
-
-/*
- * mask of cpu's on a uvhub
- * (during initialization we need to check that unsigned long has
- *  enough bits for max. cpu's per uvhub)
- */
-struct bau_local_cpumask {
-	unsigned long		bits;
-};
-
-/*
- * Payload: 16 bytes (128 bits) (bytes 0x20-0x2f of descriptor)
- * only 12 bytes (96 bits) of the payload area are usable.
- * An additional 3 bytes (bits 27:4) of the header address are carried
- * to the next bytes of the destination payload queue.
- * And an additional 2 bytes of the header Suppl_A field are also
- * carried to the destination payload queue.
- * But the first byte of the Suppl_A becomes bits 127:120 (the 16th byte)
- * of the destination payload queue, which is written by the hardware
- * with the s/w ack resource bit vector.
- * [ effective message contents (16 bytes (128 bits) maximum), not counting
- *   the s/w ack bit vector  ]
- */
-
-/**
- * struct uv2_3_bau_msg_payload - defines payload for INTD transactions
- * @address:		Signifies a page or all TLB's of the cpu
- * @sending_cpu:	CPU from which the message originates
- * @acknowledge_count:	CPUs on the destination Hub that received the interrupt
- */
-struct uv2_3_bau_msg_payload {
-	u64 address;
-	u16 sending_cpu;
-	u16 acknowledge_count;
-};
-
-/**
- * struct uv4_bau_msg_payload - defines payload for INTD transactions
- * @address:		Signifies a page or all TLB's of the cpu
- * @sending_cpu:	CPU from which the message originates
- * @acknowledge_count:	CPUs on the destination Hub that received the interrupt
- * @qualifier:		Set by source to verify origin of INTD broadcast
- */
-struct uv4_bau_msg_payload {
-	u64 address;
-	u16 sending_cpu;
-	u16 acknowledge_count;
-	u32 reserved:8;
-	u32 qualifier:24;
-};
-
-/*
- * UV2 Message header:  16 bytes (128 bits) (bytes 0x30-0x3f of descriptor)
- * see figure 9-2 of harp_sys.pdf
- * assuming UV3 is the same
- */
-struct uv2_3_bau_msg_header {
-	unsigned int	base_dest_nasid:15;	/* nasid of the first bit */
-	/* bits 14:0 */				/* in uvhub map */
-	unsigned int	dest_subnodeid:5;	/* must be 0x10, for the LB */
-	/* bits 19:15 */
-	unsigned int	rsvd_1:1;		/* must be zero */
-	/* bit 20 */
-	/* Address bits 59:21 */
-	/* bits 25:2 of address (44:21) are payload */
-	/* these next 24 bits become bytes 12-14 of msg */
-	/* bits 28:21 land in byte 12 */
-	unsigned int	replied_to:1;		/* sent as 0 by the source to
-						   byte 12 */
-	/* bit 21 */
-	unsigned int	msg_type:3;		/* software type of the
-						   message */
-	/* bits 24:22 */
-	unsigned int	canceled:1;		/* message canceled, resource
-						   is to be freed*/
-	/* bit 25 */
-	unsigned int	payload_1:3;		/* not currently used */
-	/* bits 28:26 */
-
-	/* bits 36:29 land in byte 13 */
-	unsigned int	payload_2a:3;		/* not currently used */
-	unsigned int	payload_2b:5;		/* not currently used */
-	/* bits 36:29 */
-
-	/* bits 44:37 land in byte 14 */
-	unsigned int	payload_3:8;		/* not currently used */
-	/* bits 44:37 */
-
-	unsigned int	rsvd_2:7;		/* reserved */
-	/* bits 51:45 */
-	unsigned int	swack_flag:1;		/* software acknowledge flag */
-	/* bit 52 */
-	unsigned int	rsvd_3a:3;		/* must be zero */
-	unsigned int	rsvd_3b:8;		/* must be zero */
-	unsigned int	rsvd_3c:8;		/* must be zero */
-	unsigned int	rsvd_3d:3;		/* must be zero */
-	/* bits 74:53 */
-	unsigned int	fairness:3;		/* usually zero */
-	/* bits 77:75 */
-
-	unsigned int	sequence:16;		/* message sequence number */
-	/* bits 93:78  Suppl_A  */
-	unsigned int	chaining:1;		/* next descriptor is part of
-						   this activation*/
-	/* bit 94 */
-	unsigned int	multilevel:1;		/* multi-level multicast
-						   format */
-	/* bit 95 */
-	unsigned int	rsvd_4:24;		/* ordered / source node /
-						   source subnode / aging
-						   must be zero */
-	/* bits 119:96 */
-	unsigned int	command:8;		/* message type */
-	/* bits 127:120 */
-};
-
-/*
- * The activation descriptor:
- * The format of the message to send, plus all accompanying control
- * Should be 64 bytes
- */
-struct bau_desc {
-	struct pnmask				distribution;
-	/*
-	 * message template, consisting of header and payload:
-	 */
-	union bau_msg_header {
-		struct uv2_3_bau_msg_header	uv2_3_hdr;
-	} header;
-
-	union bau_payload_header {
-		struct uv2_3_bau_msg_payload	uv2_3;
-		struct uv4_bau_msg_payload	uv4;
-	} payload;
-};
-/* UV2:
- *   -payload--    ---------header------
- *   bytes 0-11    bits 70-78  bits 21-44
- *       A           B  (2)      C (3)
- *
- *            A/B/C are moved to:
- *       A            C          B
- *   bytes 0-11  bytes 12-14  bytes 16-17  (byte 15 filled in by hw as vector)
- *   ------------payload queue-----------
- */
-
-/*
- * The payload queue on the destination side is an array of these.
- * With BAU_MISC_CONTROL set for software acknowledge mode, the messages
- * are 32 bytes (2 micropackets) (256 bits) in length, but contain only 17
- * bytes of usable data, including the sw ack vector in byte 15 (bits 127:120)
- * (12 bytes come from bau_msg_payload, 3 from payload_1, 2 from
- *  swack_vec and payload_2)
- * "Enabling Software Acknowledgment mode (see Section 4.3.3 Software
- *  Acknowledge Processing) also selects 32 byte (17 bytes usable) payload
- *  operation."
- */
-struct bau_pq_entry {
-	unsigned long	address;	/* signifies a page or all TLB's
-					   of the cpu */
-	/* 64 bits, bytes 0-7 */
-	unsigned short	sending_cpu;	/* cpu that sent the message */
-	/* 16 bits, bytes 8-9 */
-	unsigned short	acknowledge_count; /* filled in by destination */
-	/* 16 bits, bytes 10-11 */
-	/* these next 3 bytes come from bits 58-81 of the message header */
-	unsigned short	replied_to:1;	/* sent as 0 by the source */
-	unsigned short	msg_type:3;	/* software message type */
-	unsigned short	canceled:1;	/* sent as 0 by the source */
-	unsigned short	unused1:3;	/* not currently using */
-	/* byte 12 */
-	unsigned char	unused2a;	/* not currently using */
-	/* byte 13 */
-	unsigned char	unused2;	/* not currently using */
-	/* byte 14 */
-	unsigned char	swack_vec;	/* filled in by the hardware */
-	/* byte 15 (bits 127:120) */
-	unsigned short	sequence;	/* message sequence number */
-	/* bytes 16-17 */
-	unsigned char	unused4[2];	/* not currently using bytes 18-19 */
-	/* bytes 18-19 */
-	int		number_of_cpus;	/* filled in at destination */
-	/* 32 bits, bytes 20-23 (aligned) */
-	unsigned char	unused5[8];	/* not using */
-	/* bytes 24-31 */
-};
-
-struct msg_desc {
-	struct bau_pq_entry	*msg;
-	int			msg_slot;
-	struct bau_pq_entry	*queue_first;
-	struct bau_pq_entry	*queue_last;
-};
-
-struct reset_args {
-	int			sender;
-};
-
-/*
- * This structure is allocated per_cpu for UV TLB shootdown statistics.
- */
-struct ptc_stats {
-	/* sender statistics */
-	unsigned long	s_giveup;		/* number of fall backs to
-						   IPI-style flushes */
-	unsigned long	s_requestor;		/* number of shootdown
-						   requests */
-	unsigned long	s_stimeout;		/* source side timeouts */
-	unsigned long	s_dtimeout;		/* destination side timeouts */
-	unsigned long	s_strongnacks;		/* number of strong nack's */
-	unsigned long	s_time;			/* time spent in sending side */
-	unsigned long	s_retriesok;		/* successful retries */
-	unsigned long	s_ntargcpu;		/* total number of cpu's
-						   targeted */
-	unsigned long	s_ntargself;		/* times the sending cpu was
-						   targeted */
-	unsigned long	s_ntarglocals;		/* targets of cpus on the local
-						   blade */
-	unsigned long	s_ntargremotes;		/* targets of cpus on remote
-						   blades */
-	unsigned long	s_ntarglocaluvhub;	/* targets of the local hub */
-	unsigned long	s_ntargremoteuvhub;	/* remotes hubs targeted */
-	unsigned long	s_ntarguvhub;		/* total number of uvhubs
-						   targeted */
-	unsigned long	s_ntarguvhub16;		/* number of times target
-						   hubs >= 16*/
-	unsigned long	s_ntarguvhub8;		/* number of times target
-						   hubs >= 8 */
-	unsigned long	s_ntarguvhub4;		/* number of times target
-						   hubs >= 4 */
-	unsigned long	s_ntarguvhub2;		/* number of times target
-						   hubs >= 2 */
-	unsigned long	s_ntarguvhub1;		/* number of times target
-						   hubs == 1 */
-	unsigned long	s_resets_plug;		/* ipi-style resets from plug
-						   state */
-	unsigned long	s_resets_timeout;	/* ipi-style resets from
-						   timeouts */
-	unsigned long	s_busy;			/* status stayed busy past
-						   s/w timer */
-	unsigned long	s_throttles;		/* waits in throttle */
-	unsigned long	s_retry_messages;	/* retry broadcasts */
-	unsigned long	s_bau_reenabled;	/* for bau enable/disable */
-	unsigned long	s_bau_disabled;		/* for bau enable/disable */
-	unsigned long	s_uv2_wars;		/* uv2 workaround, perm. busy */
-	unsigned long	s_uv2_wars_hw;		/* uv2 workaround, hiwater */
-	unsigned long	s_uv2_war_waits;	/* uv2 workaround, long waits */
-	unsigned long	s_overipilimit;		/* over the ipi reset limit */
-	unsigned long	s_giveuplimit;		/* disables, over giveup limit*/
-	unsigned long	s_enters;		/* entries to the driver */
-	unsigned long	s_ipifordisabled;	/* fall back to IPI; disabled */
-	unsigned long	s_plugged;		/* plugged by h/w bug*/
-	unsigned long	s_congested;		/* giveup on long wait */
-	/* destination statistics */
-	unsigned long	d_alltlb;		/* times all tlb's on this
-						   cpu were flushed */
-	unsigned long	d_onetlb;		/* times just one tlb on this
-						   cpu was flushed */
-	unsigned long	d_multmsg;		/* interrupts with multiple
-						   messages */
-	unsigned long	d_nomsg;		/* interrupts with no message */
-	unsigned long	d_time;			/* time spent on destination
-						   side */
-	unsigned long	d_requestee;		/* number of messages
-						   processed */
-	unsigned long	d_retries;		/* number of retry messages
-						   processed */
-	unsigned long	d_canceled;		/* number of messages canceled
-						   by retries */
-	unsigned long	d_nocanceled;		/* retries that found nothing
-						   to cancel */
-	unsigned long	d_resets;		/* number of ipi-style requests
-						   processed */
-	unsigned long	d_rcanceled;		/* number of messages canceled
-						   by resets */
-};
-
-struct tunables {
-	int			*tunp;
-	int			deflt;
-};
-
-struct hub_and_pnode {
-	short			uvhub;
-	short			pnode;
-};
-
-struct socket_desc {
-	short			num_cpus;
-	short			cpu_number[MAX_CPUS_PER_SOCKET];
-};
-
-struct uvhub_desc {
-	unsigned short		socket_mask;
-	short			num_cpus;
-	short			uvhub;
-	short			pnode;
-	struct socket_desc	socket[2];
-};
-
-/**
- * struct bau_control
- * @status_mmr: location of status mmr, determined by uvhub_cpu
- * @status_index: index of ERR|BUSY bits in status mmr, determined by uvhub_cpu
- *
- * Per-cpu control struct containing CPU topology information and BAU tuneables.
- */
-struct bau_control {
-	struct bau_desc		*descriptor_base;
-	struct bau_pq_entry	*queue_first;
-	struct bau_pq_entry	*queue_last;
-	struct bau_pq_entry	*bau_msg_head;
-	struct bau_control	*uvhub_master;
-	struct bau_control	*socket_master;
-	struct ptc_stats	*statp;
-	cpumask_t		*cpumask;
-	unsigned long		timeout_interval;
-	unsigned long		set_bau_on_time;
-	atomic_t		active_descriptor_count;
-	int			plugged_tries;
-	int			timeout_tries;
-	int			ipi_attempts;
-	int			conseccompletes;
-	u64			status_mmr;
-	int			status_index;
-	bool			nobau;
-	short			baudisabled;
-	short			cpu;
-	short			osnode;
-	short			uvhub_cpu;
-	short			uvhub;
-	short			uvhub_version;
-	short			cpus_in_socket;
-	short			cpus_in_uvhub;
-	short			partition_base_pnode;
-	short			busy;       /* all were busy (war) */
-	unsigned short		message_number;
-	unsigned short		uvhub_quiesce;
-	short			socket_acknowledge_count[DEST_Q_SIZE];
-	cycles_t		send_message;
-	cycles_t		period_end;
-	cycles_t		period_time;
-	spinlock_t		uvhub_lock;
-	spinlock_t		queue_lock;
-	spinlock_t		disable_lock;
-	/* tunables */
-	int			max_concurr;
-	int			max_concurr_const;
-	int			plugged_delay;
-	int			plugsb4reset;
-	int			timeoutsb4reset;
-	int			ipi_reset_limit;
-	int			complete_threshold;
-	int			cong_response_us;
-	int			cong_reps;
-	cycles_t		disabled_period;
-	int			period_giveups;
-	int			giveup_limit;
-	long			period_requests;
-	struct hub_and_pnode	*thp;
-};
-
-/* Abstracted BAU functions */
-struct bau_operations {
-	unsigned long	(*read_l_sw_ack)(void);
-	unsigned long	(*read_g_sw_ack)(int pnode);
-	unsigned long	(*bau_gpa_to_offset)(unsigned long vaddr);
-	void		(*write_l_sw_ack)(unsigned long mmr);
-	void		(*write_g_sw_ack)(int pnode, unsigned long mmr);
-	void		(*write_payload_first)(int pnode, unsigned long mmr);
-	void		(*write_payload_last)(int pnode, unsigned long mmr);
-	int		(*wait_completion)(struct bau_desc*,
-				struct bau_control*, long try);
-};
-
-static inline void write_mmr_data_broadcast(int pnode, unsigned long mmr_image)
-{
-	write_gmmr(pnode, UVH_BAU_DATA_BROADCAST, mmr_image);
-}
-
-static inline void write_mmr_descriptor_base(int pnode, unsigned long mmr_image)
-{
-	write_gmmr(pnode, UVH_LB_BAU_SB_DESCRIPTOR_BASE, mmr_image);
-}
-
-static inline void write_mmr_activation(unsigned long index)
-{
-	write_lmmr(UVH_LB_BAU_SB_ACTIVATION_CONTROL, index);
-}
-
-static inline void write_gmmr_activation(int pnode, unsigned long mmr_image)
-{
-	write_gmmr(pnode, UVH_LB_BAU_SB_ACTIVATION_CONTROL, mmr_image);
-}
-
-static inline void write_mmr_proc_payload_first(int pnode, unsigned long mmr_image)
-{
-	write_gmmr(pnode, UV4H_LB_PROC_INTD_QUEUE_FIRST, mmr_image);
-}
-
-static inline void write_mmr_proc_payload_last(int pnode, unsigned long mmr_image)
-{
-	write_gmmr(pnode, UV4H_LB_PROC_INTD_QUEUE_LAST, mmr_image);
-}
-
-static inline void write_mmr_payload_first(int pnode, unsigned long mmr_image)
-{
-	write_gmmr(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_FIRST, mmr_image);
-}
-
-static inline void write_mmr_payload_tail(int pnode, unsigned long mmr_image)
-{
-	write_gmmr(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_TAIL, mmr_image);
-}
-
-static inline void write_mmr_payload_last(int pnode, unsigned long mmr_image)
-{
-	write_gmmr(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_LAST, mmr_image);
-}
-
-static inline void write_mmr_misc_control(int pnode, unsigned long mmr_image)
-{
-	write_gmmr(pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image);
-}
-
-static inline unsigned long read_mmr_misc_control(int pnode)
-{
-	return read_gmmr(pnode, UVH_LB_BAU_MISC_CONTROL);
-}
-
-static inline void write_mmr_sw_ack(unsigned long mr)
-{
-	uv_write_local_mmr(UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS, mr);
-}
-
-static inline void write_gmmr_sw_ack(int pnode, unsigned long mr)
-{
-	write_gmmr(pnode, UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS, mr);
-}
-
-static inline unsigned long read_mmr_sw_ack(void)
-{
-	return read_lmmr(UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE);
-}
-
-static inline unsigned long read_gmmr_sw_ack(int pnode)
-{
-	return read_gmmr(pnode, UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE);
-}
-
-static inline void write_mmr_proc_sw_ack(unsigned long mr)
-{
-	uv_write_local_mmr(UV4H_LB_PROC_INTD_SOFT_ACK_CLEAR, mr);
-}
-
-static inline void write_gmmr_proc_sw_ack(int pnode, unsigned long mr)
-{
-	write_gmmr(pnode, UV4H_LB_PROC_INTD_SOFT_ACK_CLEAR, mr);
-}
-
-static inline unsigned long read_mmr_proc_sw_ack(void)
-{
-	return read_lmmr(UV4H_LB_PROC_INTD_SOFT_ACK_PENDING);
-}
-
-static inline unsigned long read_gmmr_proc_sw_ack(int pnode)
-{
-	return read_gmmr(pnode, UV4H_LB_PROC_INTD_SOFT_ACK_PENDING);
-}
-
-static inline void write_mmr_data_config(int pnode, unsigned long mr)
-{
-	uv_write_global_mmr64(pnode, UVH_BAU_DATA_CONFIG, mr);
-}
-
-static inline int bau_uvhub_isset(int uvhub, struct pnmask *dstp)
-{
-	return constant_test_bit(uvhub, &dstp->bits[0]);
-}
-static inline void bau_uvhub_set(int pnode, struct pnmask *dstp)
-{
-	__set_bit(pnode, &dstp->bits[0]);
-}
-static inline void bau_uvhubs_clear(struct pnmask *dstp,
-				    int nbits)
-{
-	bitmap_zero(&dstp->bits[0], nbits);
-}
-static inline int bau_uvhub_weight(struct pnmask *dstp)
-{
-	return bitmap_weight((unsigned long *)&dstp->bits[0],
-				UV_DISTRIBUTION_SIZE);
-}
-
-static inline void bau_cpubits_clear(struct bau_local_cpumask *dstp, int nbits)
-{
-	bitmap_zero(&dstp->bits, nbits);
-}
-
-struct atomic_short {
-	short counter;
-};
-
-/*
- * atomic_read_short - read a short atomic variable
- * @v: pointer of type atomic_short
- *
- * Atomically reads the value of @v.
- */
-static inline int atomic_read_short(const struct atomic_short *v)
-{
-	return v->counter;
-}
-
-/*
- * atom_asr - add and return a short int
- * @i: short value to add
- * @v: pointer of type atomic_short
- *
- * Atomically adds @i to @v and returns @i + @v
- */
-static inline int atom_asr(short i, struct atomic_short *v)
-{
-	short __i = i;
-	asm volatile(LOCK_PREFIX "xaddw %0, %1"
-			: "+r" (i), "+m" (v->counter)
-			: : "memory");
-	return i + __i;
-}
-
-/*
- * conditionally add 1 to *v, unless *v is >= u
- * return 0 if we cannot add 1 to *v because it is >= u
- * return 1 if we can add 1 to *v because it is < u
- * the add is atomic
- *
- * This is close to atomic_add_unless(), but this allows the 'u' value
- * to be lowered below the current 'v'.  atomic_add_unless can only stop
- * on equal.
- */
-static inline int atomic_inc_unless_ge(spinlock_t *lock, atomic_t *v, int u)
-{
-	spin_lock(lock);
-	if (atomic_read(v) >= u) {
-		spin_unlock(lock);
-		return 0;
-	}
-	atomic_inc(v);
-	spin_unlock(lock);
-	return 1;
-}
-
-void uv_bau_message_interrupt(struct pt_regs *regs);
-
-#endif /* _ASM_X86_UV_UV_BAU_H */