Merge branch 'x86/uv' into x86/devel

arch/x86/kernel/Makefile

@@ -93,7 +93,7 @@ obj-$(CONFIG_OLPC)		+= olpc.o
 ###
 # 64 bit specific files
 ifeq ($(CONFIG_X86_64),y)
-        obj-y				+= genapic_64.o genapic_flat_64.o genx2apic_uv_x.o
+        obj-y				+= genapic_64.o genapic_flat_64.o genx2apic_uv_x.o tlb_uv.o
         obj-$(CONFIG_X86_PM_TIMER)	+= pmtimer_64.o
         obj-$(CONFIG_AUDIT)		+= audit_64.o
 

arch/x86/kernel/apic_32.c

@@ -1267,7 +1267,7 @@ int __init APIC_init_uniprocessor(void)
 #ifdef CONFIG_CRASH_DUMP
 	boot_cpu_physical_apicid = GET_APIC_ID(read_apic_id());
 #endif
-	phys_cpu_present_map = physid_mask_of_physid(boot_cpu_physical_apicid);
+	physid_set_mask_of_physid(boot_cpu_physical_apicid, &phys_cpu_present_map);
 
 	setup_local_APIC();
 

arch/x86/kernel/apic_64.c

@@ -918,7 +918,7 @@ int __init APIC_init_uniprocessor(void)
 
 	verify_local_APIC();
 
-	phys_cpu_present_map = physid_mask_of_physid(boot_cpu_physical_apicid);
+	physid_set_mask_of_physid(boot_cpu_physical_apicid, &phys_cpu_present_map);
 	apic_write(APIC_ID, SET_APIC_ID(boot_cpu_physical_apicid));
 
 	setup_local_APIC();

arch/x86/kernel/entry_64.S

@@ -719,6 +719,10 @@ ENTRY(apic_timer_interrupt)
 	apicinterrupt LOCAL_TIMER_VECTOR,smp_apic_timer_interrupt
 END(apic_timer_interrupt)
 
+ENTRY(uv_bau_message_intr1)
+	apicinterrupt 220,uv_bau_message_interrupt
+END(uv_bau_message_intr1)
+
 ENTRY(error_interrupt)
 	apicinterrupt ERROR_APIC_VECTOR,smp_error_interrupt
 END(error_interrupt)

arch/x86/kernel/smpboot.c

@@ -1090,10 +1090,9 @@ static __init void disable_smp(void)
 	smpboot_clear_io_apic_irqs();
 #endif
 	if (smp_found_config)
-		phys_cpu_present_map =
-				physid_mask_of_physid(boot_cpu_physical_apicid);
+		physid_set_mask_of_physid(boot_cpu_physical_apicid, &phys_cpu_present_map);
 	else
-		phys_cpu_present_map = physid_mask_of_physid(0);
+		physid_set_mask_of_physid(0, &phys_cpu_present_map);
 	map_cpu_to_logical_apicid();
 	cpu_set(0, per_cpu(cpu_sibling_map, 0));
 	cpu_set(0, per_cpu(cpu_core_map, 0));

arch/x86/kernel/tlb_64.c

@@ -15,6 +15,8 @@
 #include <asm/proto.h>
 #include <asm/apicdef.h>
 #include <asm/idle.h>
+#include <asm/uv/uv_hub.h>
+#include <asm/uv/uv_bau.h>
 
 #include <mach_ipi.h>
 /*
@@ -162,6 +164,9 @@ void native_flush_tlb_others(const cpumask_t *cpumaskp, struct mm_struct *mm,
 	union smp_flush_state *f;
 	cpumask_t cpumask = *cpumaskp;
 
+	if (is_uv_system() && uv_flush_tlb_others(&cpumask, mm, va))
+		return;
+
 	/* Caller has disabled preemption */
 	sender = smp_processor_id() % NUM_INVALIDATE_TLB_VECTORS;
 	f = &per_cpu(flush_state, sender);

include/asm-x86/atomic_64.h

@@ -425,6 +425,32 @@ static inline int atomic64_add_unless(atomic64_t *v, long a, long u)
 	return c != (u);
 }
 
+/**
+ * atomic_inc_short - increment of a short integer
+ * @v: pointer to type int
+ *
+ * Atomically adds 1 to @v
+ * Returns the new value of @u
+ */
+static inline short int atomic_inc_short(short int *v)
+{
+	asm(LOCK_PREFIX "addw $1, %0" : "+m" (*v));
+	return *v;
+}
+
+/**
+ * atomic_or_long - OR of two long integers
+ * @v1: pointer to type unsigned long
+ * @v2: pointer to type unsigned long
+ *
+ * Atomically ORs @v1 and @v2
+ * Returns the result of the OR
+ */
+static inline void atomic_or_long(unsigned long *v1, unsigned long v2)
+{
+	asm(LOCK_PREFIX "orq %1, %0" : "+m" (*v1) : "r" (v2));
+}
+
 #define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)
 
 /* These are x86-specific, used by some header files */

include/asm-x86/mpspec.h

@@ -122,6 +122,7 @@ typedef struct physid_mask physid_mask_t;
 		__physid_mask;						\
 	})
 
+/* Note: will create very large stack frames if physid_mask_t is big */
 #define physid_mask_of_physid(physid)					\
 	({								\
 		physid_mask_t __physid_mask = PHYSID_MASK_NONE;		\
@@ -129,6 +130,12 @@ typedef struct physid_mask physid_mask_t;
 		__physid_mask;						\
 	})
 
+static inline void physid_set_mask_of_physid(int physid, physid_mask_t *map)
+{
+	physids_clear(*map);
+	physid_set(physid, *map);
+}
+
 #define PHYSID_MASK_ALL		{ {[0 ... PHYSID_ARRAY_SIZE-1] = ~0UL} }
 #define PHYSID_MASK_NONE	{ {[0 ... PHYSID_ARRAY_SIZE-1] = 0UL} }
 

include/asm-x86/mpspec_def.h

@@ -17,10 +17,11 @@
 # define MAX_MPC_ENTRY 1024
 # define MAX_APICS      256
 #else
-/*
- * A maximum of 255 APICs with the current APIC ID architecture.
- */
-# define MAX_APICS 255
+# if NR_CPUS <= 255
+#  define MAX_APICS     255
+# else
+#  define MAX_APICS   32768
+# endif
 #endif
 
 struct intel_mp_floating {

include/asm-x86/uv/uv_bau.h

+/*
+ * 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 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#ifndef __ASM_X86_UV_BAU__
+#define __ASM_X86_UV_BAU__
+
+#include <linux/bitmap.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 31 sets, one for sending BAU messages from each of the 32
+ * cpu's on the node.
+ *
+ * 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 UV_ITEMS_PER_DESCRIPTOR		8
+#define UV_CPUS_PER_ACT_STATUS		32
+#define UV_ACT_STATUS_MASK		0x3
+#define UV_ACT_STATUS_SIZE		2
+#define UV_ACTIVATION_DESCRIPTOR_SIZE	32
+#define UV_DISTRIBUTION_SIZE		256
+#define UV_SW_ACK_NPENDING		8
+#define UV_BAU_MESSAGE			200
+/*
+ * Messaging irq; see irq_64.h and include/asm-x86/hw_irq_64.h
+ * To be dynamically allocated in the future
+ */
+#define UV_NET_ENDPOINT_INTD		0x38
+#define UV_DESC_BASE_PNODE_SHIFT	49
+#define UV_PAYLOADQ_PNODE_SHIFT		49
+#define UV_PTC_BASENAME			"sgi_uv/ptc_statistics"
+#define uv_physnodeaddr(x)		((__pa((unsigned long)(x)) & uv_mmask))
+
+/*
+ * bits in UVH_LB_BAU_SB_ACTIVATION_STATUS_0/1
+ */
+#define DESC_STATUS_IDLE		0
+#define DESC_STATUS_ACTIVE		1
+#define DESC_STATUS_DESTINATION_TIMEOUT	2
+#define DESC_STATUS_SOURCE_TIMEOUT	3
+
+/*
+ * source side threshholds at which message retries print a warning
+ */
+#define SOURCE_TIMEOUT_LIMIT		20
+#define DESTINATION_TIMEOUT_LIMIT	20
+
+/*
+ * number of entries in the destination side payload queue
+ */
+#define DEST_Q_SIZE			17
+/*
+ * number of destination side software ack resources
+ */
+#define DEST_NUM_RESOURCES		8
+#define MAX_CPUS_PER_NODE		32
+/*
+ * completion statuses for sending a TLB flush message
+ */
+#define	FLUSH_RETRY			1
+#define	FLUSH_GIVEUP			2
+#define	FLUSH_COMPLETE			3
+
+/*
+ * 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_nodeid' field of the header corresponds to the
+ * destination nodeID associated with that specified bit.
+ */
+struct bau_target_nodemask {
+	unsigned long bits[BITS_TO_LONGS(256)];
+};
+
+/*
+ * mask of cpu's on a node
+ * (during initialization we need to check that unsigned long has
+ *  enough bits for max. cpu's per node)
+ */
+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  ]
+ */
+
+/*
+ * The payload is software-defined for INTD transactions
+ */
+struct bau_msg_payload {
+	unsigned long address;		/* signifies a page or all TLB's
+						of the cpu */
+	/* 64 bits */
+	unsigned short sending_cpu;	/* filled in by sender */
+	/* 16 bits */
+	unsigned short acknowledge_count;/* filled in by destination */
+	/* 16 bits */
+	unsigned int reserved1:32;	/* not usable */
+};
+
+
+/*
+ * Message header:  16 bytes (128 bits) (bytes 0x30-0x3f of descriptor)
+ * see table 4.2.3.0.1 in broacast_assist spec.
+ */
+struct bau_msg_header {
+	int dest_subnodeid:6;	/* must be zero */
+	/* bits 5:0 */
+	int base_dest_nodeid:15; /* nasid>>1 (pnode) of first bit in node_map */
+	/* bits 20:6 */
+	int command:8;		/* message type */
+	/* bits 28:21 */
+				/* 0x38: SN3net EndPoint Message */
+	int rsvd_1:3;		/* must be zero */
+	/* bits 31:29 */
+				/* int will align on 32 bits */
+	int rsvd_2:9;		/* must be zero */
+	/* bits 40:32 */
+				/* Suppl_A is 56-41 */
+	int payload_2a:8;	/* becomes byte 16 of msg */
+	/* bits 48:41 */	/* not currently using */
+	int payload_2b:8;	/* becomes byte 17 of msg */
+	/* bits 56:49 */	/* not currently using */
+				/* Address field (96:57) is never used as an
+				   address (these are address bits 42:3) */
+	int rsvd_3:1;		/* must be zero */
+	/* bit 57 */
+				/* address bits 27:4 are payload */
+				/* these 24 bits become bytes 12-14 of msg */
+	int replied_to:1;	/* sent as 0 by the source to byte 12 */
+	/* bit 58 */
+
+	int payload_1a:5;	/* not currently used */
+	/* bits 63:59 */
+	int payload_1b:8;	/* not currently used */
+	/* bits 71:64 */
+	int payload_1c:8;	/* not currently used */
+	/* bits 79:72 */
+	int payload_1d:2;	/* not currently used */
+	/* bits 81:80 */
+
+	int rsvd_4:7;		/* must be zero */
+	/* bits 88:82 */
+	int sw_ack_flag:1;	/* software acknowledge flag */
+	/* bit 89 */
+				/* INTD trasactions at destination are to
+				   wait for software acknowledge */
+	int rsvd_5:6;		/* must be zero */
+	/* bits 95:90 */
+	int rsvd_6:5;		/* must be zero */
+	/* bits 100:96 */
+	int int_both:1;		/* if 1, interrupt both sockets on the blade */
+	/* bit 101*/
+	int fairness:3;		/* usually zero */
+	/* bits 104:102 */
+	int multilevel:1;	/* multi-level multicast format */
+	/* bit 105 */
+				/* 0 for TLB: endpoint multi-unicast messages */
+	int chaining:1;		/* next descriptor is part of this activation*/
+	/* bit 106 */
+	int rsvd_7:21;		/* must be zero */
+	/* bits 127:107 */
+};
+
+/*
+ * The activation descriptor:
+ * The format of the message to send, plus all accompanying control
+ * Should be 64 bytes
+ */
+struct bau_desc {
+	struct bau_target_nodemask distribution;
+	/*
+	 * message template, consisting of header and payload:
+	 */
+	struct bau_msg_header header;
+	struct bau_msg_payload payload;
+};
+/*
+ *   -payload--    ---------header------
+ *   bytes 0-11    bits 41-56  bits 58-81
+ *       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
+ *  sw_ack_vector 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_payload_queue_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 */
+
+	unsigned short replied_to:1;	/* sent as 0 by the source */
+	/* 1 bit */
+	unsigned short unused1:7;       /* not currently using */
+	/* 7 bits: byte 12) */
+
+	unsigned char unused2[2];	/* not currently using */
+	/* bytes 13-14 */
+
+	unsigned char sw_ack_vector;	/* filled in by the hardware */
+	/* byte 15 (bits 127:120) */
+
+	unsigned char unused4[3];	/* not currently using bytes 17-19 */
+	/* bytes 17-19 */
+
+	int number_of_cpus;		/* filled in at destination */
+	/* 32 bits, bytes 20-23 (aligned) */
+
+	unsigned char unused5[8];       /* not using */
+	/* bytes 24-31 */
+};
+
+/*
+ * one for every slot in the destination payload queue
+ */
+struct bau_msg_status {
+	struct bau_local_cpumask seen_by;	/* map of cpu's */
+};
+
+/*
+ * one for every slot in the destination software ack resources
+ */
+struct bau_sw_ack_status {
+	struct bau_payload_queue_entry *msg;	/* associated message */
+	int watcher;				/* cpu monitoring, or -1 */
+};
+
+/*
+ * one on every node and per-cpu; to locate the software tables
+ */
+struct bau_control {
+	struct bau_desc *descriptor_base;
+	struct bau_payload_queue_entry *bau_msg_head;
+	struct bau_payload_queue_entry *va_queue_first;
+	struct bau_payload_queue_entry *va_queue_last;
+	struct bau_msg_status *msg_statuses;
+	int *watching; /* pointer to array */
+};
+
+/*
+ * This structure is allocated per_cpu for UV TLB shootdown statistics.
+ */
+struct ptc_stats {
+	unsigned long ptc_i;	/* number of IPI-style flushes */
+	unsigned long requestor;	/* number of nodes this cpu sent to */
+	unsigned long requestee;	/* times cpu was remotely requested */
+	unsigned long alltlb;	/* times all tlb's on this cpu were flushed */
+	unsigned long onetlb;	/* times just one tlb on this cpu was flushed */
+	unsigned long s_retry;	/* retries on source side timeouts */
+	unsigned long d_retry;	/* retries on destination side timeouts */
+	unsigned long sflush;	/* cycles spent in uv_flush_tlb_others */
+	unsigned long dflush;	/* cycles spent on destination side */
+	unsigned long retriesok; /* successes on retries */
+	unsigned long nomsg;	/* interrupts with no message */
+	unsigned long multmsg;	/* interrupts with multiple messages */
+	unsigned long ntargeted;/* nodes targeted */
+};
+
+static inline int bau_node_isset(int node, struct bau_target_nodemask *dstp)
+{
+	return constant_test_bit(node, &dstp->bits[0]);
+}
+static inline void bau_node_set(int node, struct bau_target_nodemask *dstp)
+{
+	__set_bit(node, &dstp->bits[0]);
+}
+static inline void bau_nodes_clear(struct bau_target_nodemask *dstp, int nbits)
+{
+	bitmap_zero(&dstp->bits[0], nbits);
+}
+
+static inline void bau_cpubits_clear(struct bau_local_cpumask *dstp, int nbits)
+{
+	bitmap_zero(&dstp->bits, nbits);
+}
+
+#define cpubit_isset(cpu, bau_local_cpumask) \
+	test_bit((cpu), (bau_local_cpumask).bits)
+
+extern int uv_flush_tlb_others(cpumask_t *, struct mm_struct *, unsigned long);
+extern void uv_bau_message_intr1(void);
+extern void uv_bau_timeout_intr1(void);
+
+#endif /* __ASM_X86_UV_BAU__ */