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Diffstat (limited to 'arch/x86/include/asm/uv/uv_bau.h')
| -rw-r--r-- | arch/x86/include/asm/uv/uv_bau.h | 861 |
1 files changed, 861 insertions, 0 deletions
diff --git a/arch/x86/include/asm/uv/uv_bau.h b/arch/x86/include/asm/uv/uv_bau.h new file mode 100644 index 000000000..7803114aa --- /dev/null +++ b/arch/x86/include/asm/uv/uv_bau.h @@ -0,0 +1,861 @@ +/* + * 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> +#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 UV1_NET_ENDPOINT_INTD 0x38 +#define UV2_NET_ENDPOINT_INTD 0x28 +#define UV_NET_ENDPOINT_INTD (is_uv1_hub() ? \ + UV1_NET_ENDPOINT_INTD : UV2_NET_ENDPOINT_INTD) +#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, similar to UV1: 65 units of 10us + */ +#define UV1_INTD_SOFT_ACK_TIMEOUT_PERIOD (9UL) +#define UV2_INTD_SOFT_ACK_TIMEOUT_PERIOD (15UL) + +#define UV_INTD_SOFT_ACK_TIMEOUT_PERIOD (is_uv1_hub() ? \ + UV1_INTD_SOFT_ACK_TIMEOUT_PERIOD : \ + UV2_INTD_SOFT_ACK_TIMEOUT_PERIOD) +/* 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 + +/* these two are the same for UV1 and UV2: */ +#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_V1 = 1, + UV_BAU_V2, + 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 uv1_2_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 uv1_2_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; +}; + +/* + * UV1 Message header: 16 bytes (128 bits) (bytes 0x30-0x3f of descriptor) + * see table 4.2.3.0.1 in broacast_assist spec. + */ +struct uv1_bau_msg_header { + unsigned int dest_subnodeid:6; /* must be 0x10, for the LB */ + /* bits 5:0 */ + unsigned int base_dest_nasid:15; /* nasid of the first bit */ + /* bits 20:6 */ /* in uvhub map */ + unsigned int command:8; /* message type */ + /* bits 28:21 */ + /* 0x38: SN3net EndPoint Message */ + unsigned int rsvd_1:3; /* must be zero */ + /* bits 31:29 */ + /* int will align on 32 bits */ + unsigned int rsvd_2:9; /* must be zero */ + /* bits 40:32 */ + /* Suppl_A is 56-41 */ + unsigned int sequence:16; /* message sequence number */ + /* bits 56:41 */ /* becomes bytes 16-17 of msg */ + /* Address field (96:57) is + never used as an address + (these are address bits + 42:3) */ + + unsigned int rsvd_3:1; /* must be zero */ + /* bit 57 */ + /* address bits 27:4 are payload */ + /* these next 24 (58-81) bits become bytes 12-14 of msg */ + /* bits 65:58 land in byte 12 */ + unsigned int replied_to:1; /* sent as 0 by the source to + byte 12 */ + /* bit 58 */ + unsigned int msg_type:3; /* software type of the + message */ + /* bits 61:59 */ + unsigned int canceled:1; /* message canceled, resource + is to be freed*/ + /* bit 62 */ + unsigned int payload_1a:1; /* not currently used */ + /* bit 63 */ + unsigned int payload_1b:2; /* not currently used */ + /* bits 65:64 */ + + /* bits 73:66 land in byte 13 */ + unsigned int payload_1ca:6; /* not currently used */ + /* bits 71:66 */ + unsigned int payload_1c:2; /* not currently used */ + /* bits 73:72 */ + + /* bits 81:74 land in byte 14 */ + unsigned int payload_1d:6; /* not currently used */ + /* bits 79:74 */ + unsigned int payload_1e:2; /* not currently used */ + /* bits 81:80 */ + + unsigned int rsvd_4:7; /* must be zero */ + /* bits 88:82 */ + unsigned int swack_flag:1; /* software acknowledge flag */ + /* bit 89 */ + /* INTD trasactions at + destination are to wait for + software acknowledge */ + unsigned int rsvd_5:6; /* must be zero */ + /* bits 95:90 */ + unsigned int rsvd_6:5; /* must be zero */ + /* bits 100:96 */ + unsigned int int_both:1; /* if 1, interrupt both sockets + on the uvhub */ + /* bit 101*/ + unsigned int fairness:3; /* usually zero */ + /* bits 104:102 */ + unsigned int multilevel:1; /* multi-level multicast + format */ + /* bit 105 */ + /* 0 for TLB: endpoint multi-unicast messages */ + unsigned int chaining:1; /* next descriptor is part of + this activation*/ + /* bit 106 */ + unsigned int rsvd_7:21; /* must be zero */ + /* bits 127:107 */ +}; + +/* + * 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 uv1_bau_msg_header uv1_hdr; + struct uv2_3_bau_msg_header uv2_3_hdr; + } header; + + union bau_payload_header { + struct uv1_2_3_bau_msg_payload uv1_2_3; + struct uv4_bau_msg_payload uv4; + } payload; +}; +/* UV1: + * -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----------- + */ +/* 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); +} + +extern void uv_bau_message_intr1(void); +#ifdef CONFIG_TRACING +#define trace_uv_bau_message_intr1 uv_bau_message_intr1 +#endif +extern void uv_bau_timeout_intr1(void); + +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; +} + +#endif /* _ASM_X86_UV_UV_BAU_H */ |