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1/*2 * This file is subject to the terms and conditions of the GNU General Public3 * License. See the file "COPYING" in the main directory of this archive4 * for more details.5 *6 * Copyright (c) 2004-2009 Silicon Graphics, Inc. All Rights Reserved.7 */8 9/*10 * Cross Partition Communication (XPC) structures and macros.11 */12 13#ifndef _DRIVERS_MISC_SGIXP_XPC_H14#define _DRIVERS_MISC_SGIXP_XPC_H15 16#include <linux/wait.h>17#include <linux/completion.h>18#include <linux/timer.h>19#include <linux/sched.h>20#include "xp.h"21 22/*23 * XPC Version numbers consist of a major and minor number. XPC can always24 * talk to versions with same major #, and never talk to versions with a25 * different major #.26 */27#define _XPC_VERSION(_maj, _min) (((_maj) << 4) | ((_min) & 0xf))28#define XPC_VERSION_MAJOR(_v) ((_v) >> 4)29#define XPC_VERSION_MINOR(_v) ((_v) & 0xf)30 31/* define frequency of the heartbeat and frequency how often it's checked */32#define XPC_HB_DEFAULT_INTERVAL 5 /* incr HB every x secs */33#define XPC_HB_CHECK_DEFAULT_INTERVAL 20 /* check HB every x secs */34 35/* define the process name of HB checker and the CPU it is pinned to */36#define XPC_HB_CHECK_THREAD_NAME "xpc_hb"37#define XPC_HB_CHECK_CPU 038 39/* define the process name of the discovery thread */40#define XPC_DISCOVERY_THREAD_NAME "xpc_discovery"41 42/*43 * the reserved page44 *45 * SAL reserves one page of memory per partition for XPC. Though a full page46 * in length (16384 bytes), its starting address is not page aligned, but it47 * is cacheline aligned. The reserved page consists of the following:48 *49 * reserved page header50 *51 * The first two 64-byte cachelines of the reserved page contain the52 * header (struct xpc_rsvd_page). Before SAL initialization has completed,53 * SAL has set up the following fields of the reserved page header:54 * SAL_signature, SAL_version, SAL_partid, and SAL_nasids_size. The55 * other fields are set up by XPC. (xpc_rsvd_page points to the local56 * partition's reserved page.)57 *58 * part_nasids mask59 * mach_nasids mask60 *61 * SAL also sets up two bitmaps (or masks), one that reflects the actual62 * nasids in this partition (part_nasids), and the other that reflects63 * the actual nasids in the entire machine (mach_nasids). We're only64 * interested in the even numbered nasids (which contain the processors65 * and/or memory), so we only need half as many bits to represent the66 * nasids. When mapping nasid to bit in a mask (or bit to nasid) be sure67 * to either divide or multiply by 2. The part_nasids mask is located68 * starting at the first cacheline following the reserved page header. The69 * mach_nasids mask follows right after the part_nasids mask. The size in70 * bytes of each mask is reflected by the reserved page header field71 * 'SAL_nasids_size'. (Local partition's mask pointers are xpc_part_nasids72 * and xpc_mach_nasids.)73 *74 * Immediately following the mach_nasids mask are the XPC variables75 * required by other partitions. First are those that are generic to all76 * partitions (vars), followed on the next available cacheline by those77 * which are partition specific (vars part). These are setup by XPC.78 *79 * Note: Until 'ts_jiffies' is set non-zero, the partition XPC code has not been80 * initialized.81 */82struct xpc_rsvd_page {83 u64 SAL_signature; /* SAL: unique signature */84 u64 SAL_version; /* SAL: version */85 short SAL_partid; /* SAL: partition ID */86 short max_npartitions; /* value of XPC_MAX_PARTITIONS */87 u8 version;88 u8 pad1[3]; /* align to next u64 in 1st 64-byte cacheline */89 unsigned long ts_jiffies; /* timestamp when rsvd pg was setup by XPC */90 union {91 struct {92 unsigned long heartbeat_gpa; /* phys addr */93 unsigned long activate_gru_mq_desc_gpa; /* phys addr */94 } uv;95 } sn;96 u64 pad2[9]; /* align to last u64 in 2nd 64-byte cacheline */97 u64 SAL_nasids_size; /* SAL: size of each nasid mask in bytes */98};99 100#define XPC_RP_VERSION _XPC_VERSION(3, 0) /* version 3.0 of the reserved page */101 102/* the reserved page sizes and offsets */103 104#define XPC_RP_HEADER_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_rsvd_page))105 106#define XPC_RP_PART_NASIDS(_rp) ((unsigned long *)((u8 *)(_rp) + \107 XPC_RP_HEADER_SIZE))108#define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + \109 xpc_nasid_mask_nlongs)110 111 112/*113 * The following structure describes the partition's heartbeat info which114 * will be periodically read by other partitions to determine whether this115 * XPC is still 'alive'.116 */117struct xpc_heartbeat_uv {118 unsigned long value;119 unsigned long offline; /* if 0, heartbeat should be changing */120};121 122/*123 * Info pertinent to a GRU message queue using a watch list for irq generation.124 */125struct xpc_gru_mq_uv {126 void *address; /* address of GRU message queue */127 unsigned int order; /* size of GRU message queue as a power of 2 */128 int irq; /* irq raised when message is received in mq */129 int mmr_blade; /* blade where watchlist was allocated from */130 unsigned long mmr_offset; /* offset of irq mmr located on mmr_blade */131 unsigned long mmr_value; /* value of irq mmr located on mmr_blade */132 int watchlist_num; /* number of watchlist allocatd by BIOS */133 void *gru_mq_desc; /* opaque structure used by the GRU driver */134};135 136/*137 * The activate_mq is used to send/receive GRU messages that affect XPC's138 * partition active state and channel state. This is uv only.139 */140struct xpc_activate_mq_msghdr_uv {141 unsigned int gru_msg_hdr; /* FOR GRU INTERNAL USE ONLY */142 short partid; /* sender's partid */143 u8 act_state; /* sender's act_state at time msg sent */144 u8 type; /* message's type */145 unsigned long rp_ts_jiffies; /* timestamp of sender's rp setup by XPC */146};147 148/* activate_mq defined message types */149#define XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV 0150 151#define XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV 1152#define XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV 2153 154#define XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV 3155#define XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV 4156#define XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV 5157#define XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV 6158#define XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV 7159 160#define XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV 8161#define XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV 9162 163struct xpc_activate_mq_msg_uv {164 struct xpc_activate_mq_msghdr_uv hdr;165};166 167struct xpc_activate_mq_msg_activate_req_uv {168 struct xpc_activate_mq_msghdr_uv hdr;169 unsigned long rp_gpa;170 unsigned long heartbeat_gpa;171 unsigned long activate_gru_mq_desc_gpa;172};173 174struct xpc_activate_mq_msg_deactivate_req_uv {175 struct xpc_activate_mq_msghdr_uv hdr;176 enum xp_retval reason;177};178 179struct xpc_activate_mq_msg_chctl_closerequest_uv {180 struct xpc_activate_mq_msghdr_uv hdr;181 short ch_number;182 enum xp_retval reason;183};184 185struct xpc_activate_mq_msg_chctl_closereply_uv {186 struct xpc_activate_mq_msghdr_uv hdr;187 short ch_number;188};189 190struct xpc_activate_mq_msg_chctl_openrequest_uv {191 struct xpc_activate_mq_msghdr_uv hdr;192 short ch_number;193 short entry_size; /* size of notify_mq's GRU messages */194 short local_nentries; /* ??? Is this needed? What is? */195};196 197struct xpc_activate_mq_msg_chctl_openreply_uv {198 struct xpc_activate_mq_msghdr_uv hdr;199 short ch_number;200 short remote_nentries; /* ??? Is this needed? What is? */201 short local_nentries; /* ??? Is this needed? What is? */202 unsigned long notify_gru_mq_desc_gpa;203};204 205struct xpc_activate_mq_msg_chctl_opencomplete_uv {206 struct xpc_activate_mq_msghdr_uv hdr;207 short ch_number;208};209 210/*211 * Functions registered by add_timer() or called by kernel_thread() only212 * allow for a single 64-bit argument. The following macros can be used to213 * pack and unpack two (32-bit, 16-bit or 8-bit) arguments into or out from214 * the passed argument.215 */216#define XPC_PACK_ARGS(_arg1, _arg2) \217 ((((u64)_arg1) & 0xffffffff) | \218 ((((u64)_arg2) & 0xffffffff) << 32))219 220#define XPC_UNPACK_ARG1(_args) (((u64)_args) & 0xffffffff)221#define XPC_UNPACK_ARG2(_args) ((((u64)_args) >> 32) & 0xffffffff)222 223/*224 * Define a structure that contains arguments associated with opening and225 * closing a channel.226 */227struct xpc_openclose_args {228 u16 reason; /* reason why channel is closing */229 u16 entry_size; /* sizeof each message entry */230 u16 remote_nentries; /* #of message entries in remote msg queue */231 u16 local_nentries; /* #of message entries in local msg queue */232 unsigned long local_msgqueue_pa; /* phys addr of local message queue */233};234 235#define XPC_OPENCLOSE_ARGS_SIZE \236 L1_CACHE_ALIGN(sizeof(struct xpc_openclose_args) * \237 XPC_MAX_NCHANNELS)238 239 240/*241 * Structures to define a fifo singly-linked list.242 */243 244struct xpc_fifo_entry_uv {245 struct xpc_fifo_entry_uv *next;246};247 248struct xpc_fifo_head_uv {249 struct xpc_fifo_entry_uv *first;250 struct xpc_fifo_entry_uv *last;251 spinlock_t lock;252 int n_entries;253};254 255/*256 * The format of a uv XPC notify_mq GRU message is as follows:257 *258 * A user-defined message resides in the payload area. The max size of the259 * payload is defined by the user via xpc_connect().260 *261 * The size of a message (payload and header) sent via the GRU must be either 1262 * or 2 GRU_CACHE_LINE_BYTES in length.263 */264 265struct xpc_notify_mq_msghdr_uv {266 union {267 unsigned int gru_msg_hdr; /* FOR GRU INTERNAL USE ONLY */268 struct xpc_fifo_entry_uv next; /* FOR XPC INTERNAL USE ONLY */269 } u;270 short partid; /* FOR XPC INTERNAL USE ONLY */271 u8 ch_number; /* FOR XPC INTERNAL USE ONLY */272 u8 size; /* FOR XPC INTERNAL USE ONLY */273 unsigned int msg_slot_number; /* FOR XPC INTERNAL USE ONLY */274};275 276struct xpc_notify_mq_msg_uv {277 struct xpc_notify_mq_msghdr_uv hdr;278 unsigned long payload;279};280 281/* struct xpc_notify_sn2 type of notification */282 283#define XPC_N_CALL 0x01 /* notify function provided by user */284 285/*286 * Define uv's version of the notify entry. It additionally is used to allocate287 * a msg slot on the remote partition into which is copied a sent message.288 */289struct xpc_send_msg_slot_uv {290 struct xpc_fifo_entry_uv next;291 unsigned int msg_slot_number;292 xpc_notify_func func; /* user's notify function */293 void *key; /* pointer to user's key */294};295 296/*297 * Define the structure that manages all the stuff required by a channel. In298 * particular, they are used to manage the messages sent across the channel.299 *300 * This structure is private to a partition, and is NOT shared across the301 * partition boundary.302 *303 * There is an array of these structures for each remote partition. It is304 * allocated at the time a partition becomes active. The array contains one305 * of these structures for each potential channel connection to that partition.306 */307 308struct xpc_channel_uv {309 void *cached_notify_gru_mq_desc; /* remote partition's notify mq's */310 /* gru mq descriptor */311 312 struct xpc_send_msg_slot_uv *send_msg_slots;313 void *recv_msg_slots; /* each slot will hold a xpc_notify_mq_msg_uv */314 /* structure plus the user's payload */315 316 struct xpc_fifo_head_uv msg_slot_free_list;317 struct xpc_fifo_head_uv recv_msg_list; /* deliverable payloads */318};319 320struct xpc_channel {321 short partid; /* ID of remote partition connected */322 spinlock_t lock; /* lock for updating this structure */323 unsigned int flags; /* general flags */324 325 enum xp_retval reason; /* reason why channel is disconnect'g */326 int reason_line; /* line# disconnect initiated from */327 328 u16 number; /* channel # */329 330 u16 entry_size; /* sizeof each msg entry */331 u16 local_nentries; /* #of msg entries in local msg queue */332 u16 remote_nentries; /* #of msg entries in remote msg queue */333 334 atomic_t references; /* #of external references to queues */335 336 atomic_t n_on_msg_allocate_wq; /* #on msg allocation wait queue */337 wait_queue_head_t msg_allocate_wq; /* msg allocation wait queue */338 339 u8 delayed_chctl_flags; /* chctl flags received, but delayed */340 /* action until channel disconnected */341 342 atomic_t n_to_notify; /* #of msg senders to notify */343 344 xpc_channel_func func; /* user's channel function */345 void *key; /* pointer to user's key */346 347 struct completion wdisconnect_wait; /* wait for channel disconnect */348 349 /* kthread management related fields */350 351 atomic_t kthreads_assigned; /* #of kthreads assigned to channel */352 u32 kthreads_assigned_limit; /* limit on #of kthreads assigned */353 atomic_t kthreads_idle; /* #of kthreads idle waiting for work */354 u32 kthreads_idle_limit; /* limit on #of kthreads idle */355 atomic_t kthreads_active; /* #of kthreads actively working */356 357 wait_queue_head_t idle_wq; /* idle kthread wait queue */358 359 union {360 struct xpc_channel_uv uv;361 } sn;362 363} ____cacheline_aligned;364 365/* struct xpc_channel flags */366 367#define XPC_C_WASCONNECTED 0x00000001 /* channel was connected */368 369#define XPC_C_ROPENCOMPLETE 0x00000002 /* remote open channel complete */370#define XPC_C_OPENCOMPLETE 0x00000004 /* local open channel complete */371#define XPC_C_ROPENREPLY 0x00000008 /* remote open channel reply */372#define XPC_C_OPENREPLY 0x00000010 /* local open channel reply */373#define XPC_C_ROPENREQUEST 0x00000020 /* remote open channel request */374#define XPC_C_OPENREQUEST 0x00000040 /* local open channel request */375 376#define XPC_C_SETUP 0x00000080 /* channel's msgqueues are alloc'd */377#define XPC_C_CONNECTEDCALLOUT 0x00000100 /* connected callout initiated */378#define XPC_C_CONNECTEDCALLOUT_MADE \379 0x00000200 /* connected callout completed */380#define XPC_C_CONNECTED 0x00000400 /* local channel is connected */381#define XPC_C_CONNECTING 0x00000800 /* channel is being connected */382 383#define XPC_C_RCLOSEREPLY 0x00001000 /* remote close channel reply */384#define XPC_C_CLOSEREPLY 0x00002000 /* local close channel reply */385#define XPC_C_RCLOSEREQUEST 0x00004000 /* remote close channel request */386#define XPC_C_CLOSEREQUEST 0x00008000 /* local close channel request */387 388#define XPC_C_DISCONNECTED 0x00010000 /* channel is disconnected */389#define XPC_C_DISCONNECTING 0x00020000 /* channel is being disconnected */390#define XPC_C_DISCONNECTINGCALLOUT \391 0x00040000 /* disconnecting callout initiated */392#define XPC_C_DISCONNECTINGCALLOUT_MADE \393 0x00080000 /* disconnecting callout completed */394#define XPC_C_WDISCONNECT 0x00100000 /* waiting for channel disconnect */395 396/*397 * The channel control flags (chctl) union consists of a 64-bit variable which398 * is divided up into eight bytes, ordered from right to left. Byte zero399 * pertains to channel 0, byte one to channel 1, and so on. Each channel's byte400 * can have one or more of the chctl flags set in it.401 */402 403union xpc_channel_ctl_flags {404 u64 all_flags;405 u8 flags[XPC_MAX_NCHANNELS];406};407 408/* chctl flags */409#define XPC_CHCTL_CLOSEREQUEST 0x01410#define XPC_CHCTL_CLOSEREPLY 0x02411#define XPC_CHCTL_OPENREQUEST 0x04412#define XPC_CHCTL_OPENREPLY 0x08413#define XPC_CHCTL_OPENCOMPLETE 0x10414#define XPC_CHCTL_MSGREQUEST 0x20415 416#define XPC_OPENCLOSE_CHCTL_FLAGS \417 (XPC_CHCTL_CLOSEREQUEST | XPC_CHCTL_CLOSEREPLY | \418 XPC_CHCTL_OPENREQUEST | XPC_CHCTL_OPENREPLY | \419 XPC_CHCTL_OPENCOMPLETE)420#define XPC_MSG_CHCTL_FLAGS XPC_CHCTL_MSGREQUEST421 422static inline int423xpc_any_openclose_chctl_flags_set(union xpc_channel_ctl_flags *chctl)424{425 int ch_number;426 427 for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++) {428 if (chctl->flags[ch_number] & XPC_OPENCLOSE_CHCTL_FLAGS)429 return 1;430 }431 return 0;432}433 434static inline int435xpc_any_msg_chctl_flags_set(union xpc_channel_ctl_flags *chctl)436{437 int ch_number;438 439 for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++) {440 if (chctl->flags[ch_number] & XPC_MSG_CHCTL_FLAGS)441 return 1;442 }443 return 0;444}445 446struct xpc_partition_uv {447 unsigned long heartbeat_gpa; /* phys addr of partition's heartbeat */448 struct xpc_heartbeat_uv cached_heartbeat; /* cached copy of */449 /* partition's heartbeat */450 unsigned long activate_gru_mq_desc_gpa; /* phys addr of parititon's */451 /* activate mq's gru mq */452 /* descriptor */453 void *cached_activate_gru_mq_desc; /* cached copy of partition's */454 /* activate mq's gru mq descriptor */455 struct mutex cached_activate_gru_mq_desc_mutex;456 spinlock_t flags_lock; /* protect updating of flags */457 unsigned int flags; /* general flags */458 u8 remote_act_state; /* remote partition's act_state */459 u8 act_state_req; /* act_state request from remote partition */460 enum xp_retval reason; /* reason for deactivate act_state request */461};462 463/* struct xpc_partition_uv flags */464 465#define XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV 0x00000001466#define XPC_P_ENGAGED_UV 0x00000002467 468/* struct xpc_partition_uv act_state change requests */469 470#define XPC_P_ASR_ACTIVATE_UV 0x01471#define XPC_P_ASR_REACTIVATE_UV 0x02472#define XPC_P_ASR_DEACTIVATE_UV 0x03473 474struct xpc_partition {475 476 /* XPC HB infrastructure */477 478 u8 remote_rp_version; /* version# of partition's rsvd pg */479 unsigned long remote_rp_ts_jiffies; /* timestamp when rsvd pg setup */480 unsigned long remote_rp_pa; /* phys addr of partition's rsvd pg */481 u64 last_heartbeat; /* HB at last read */482 u32 activate_IRQ_rcvd; /* IRQs since activation */483 spinlock_t act_lock; /* protect updating of act_state */484 u8 act_state; /* from XPC HB viewpoint */485 enum xp_retval reason; /* reason partition is deactivating */486 int reason_line; /* line# deactivation initiated from */487 488 unsigned long disengage_timeout; /* timeout in jiffies */489 struct timer_list disengage_timer;490 491 /* XPC infrastructure referencing and teardown control */492 493 u8 setup_state; /* infrastructure setup state */494 wait_queue_head_t teardown_wq; /* kthread waiting to teardown infra */495 atomic_t references; /* #of references to infrastructure */496 497 u8 nchannels; /* #of defined channels supported */498 atomic_t nchannels_active; /* #of channels that are not DISCONNECTED */499 atomic_t nchannels_engaged; /* #of channels engaged with remote part */500 struct xpc_channel *channels; /* array of channel structures */501 502 /* fields used for managing channel avialability and activity */503 504 union xpc_channel_ctl_flags chctl; /* chctl flags yet to be processed */505 spinlock_t chctl_lock; /* chctl flags lock */506 507 void *remote_openclose_args_base; /* base address of kmalloc'd space */508 struct xpc_openclose_args *remote_openclose_args; /* copy of remote's */509 /* args */510 511 /* channel manager related fields */512 513 atomic_t channel_mgr_requests; /* #of requests to activate chan mgr */514 wait_queue_head_t channel_mgr_wq; /* channel mgr's wait queue */515 516 union {517 struct xpc_partition_uv uv;518 } sn;519 520} ____cacheline_aligned;521 522struct xpc_arch_operations {523 int (*setup_partitions) (void);524 void (*teardown_partitions) (void);525 void (*process_activate_IRQ_rcvd) (void);526 enum xp_retval (*get_partition_rsvd_page_pa)527 (void *, u64 *, unsigned long *, size_t *);528 int (*setup_rsvd_page) (struct xpc_rsvd_page *);529 530 void (*allow_hb) (short);531 void (*disallow_hb) (short);532 void (*disallow_all_hbs) (void);533 void (*increment_heartbeat) (void);534 void (*offline_heartbeat) (void);535 void (*online_heartbeat) (void);536 void (*heartbeat_init) (void);537 void (*heartbeat_exit) (void);538 enum xp_retval (*get_remote_heartbeat) (struct xpc_partition *);539 540 void (*request_partition_activation) (struct xpc_rsvd_page *,541 unsigned long, int);542 void (*request_partition_reactivation) (struct xpc_partition *);543 void (*request_partition_deactivation) (struct xpc_partition *);544 void (*cancel_partition_deactivation_request) (struct xpc_partition *);545 enum xp_retval (*setup_ch_structures) (struct xpc_partition *);546 void (*teardown_ch_structures) (struct xpc_partition *);547 548 enum xp_retval (*make_first_contact) (struct xpc_partition *);549 550 u64 (*get_chctl_all_flags) (struct xpc_partition *);551 void (*send_chctl_closerequest) (struct xpc_channel *, unsigned long *);552 void (*send_chctl_closereply) (struct xpc_channel *, unsigned long *);553 void (*send_chctl_openrequest) (struct xpc_channel *, unsigned long *);554 void (*send_chctl_openreply) (struct xpc_channel *, unsigned long *);555 void (*send_chctl_opencomplete) (struct xpc_channel *, unsigned long *);556 void (*process_msg_chctl_flags) (struct xpc_partition *, int);557 558 enum xp_retval (*save_remote_msgqueue_pa) (struct xpc_channel *,559 unsigned long);560 561 enum xp_retval (*setup_msg_structures) (struct xpc_channel *);562 void (*teardown_msg_structures) (struct xpc_channel *);563 564 void (*indicate_partition_engaged) (struct xpc_partition *);565 void (*indicate_partition_disengaged) (struct xpc_partition *);566 void (*assume_partition_disengaged) (short);567 int (*partition_engaged) (short);568 int (*any_partition_engaged) (void);569 570 int (*n_of_deliverable_payloads) (struct xpc_channel *);571 enum xp_retval (*send_payload) (struct xpc_channel *, u32, void *,572 u16, u8, xpc_notify_func, void *);573 void *(*get_deliverable_payload) (struct xpc_channel *);574 void (*received_payload) (struct xpc_channel *, void *);575 void (*notify_senders_of_disconnect) (struct xpc_channel *);576};577 578/* struct xpc_partition act_state values (for XPC HB) */579 580#define XPC_P_AS_INACTIVE 0x00 /* partition is not active */581#define XPC_P_AS_ACTIVATION_REQ 0x01 /* created thread to activate */582#define XPC_P_AS_ACTIVATING 0x02 /* activation thread started */583#define XPC_P_AS_ACTIVE 0x03 /* xpc_partition_up() was called */584#define XPC_P_AS_DEACTIVATING 0x04 /* partition deactivation initiated */585 586#define XPC_DEACTIVATE_PARTITION(_p, _reason) \587 xpc_deactivate_partition(__LINE__, (_p), (_reason))588 589/* struct xpc_partition setup_state values */590 591#define XPC_P_SS_UNSET 0x00 /* infrastructure was never setup */592#define XPC_P_SS_SETUP 0x01 /* infrastructure is setup */593#define XPC_P_SS_WTEARDOWN 0x02 /* waiting to teardown infrastructure */594#define XPC_P_SS_TORNDOWN 0x03 /* infrastructure is torndown */595 596/* number of seconds to wait for other partitions to disengage */597#define XPC_DISENGAGE_DEFAULT_TIMELIMIT 90598 599/* interval in seconds to print 'waiting deactivation' messages */600#define XPC_DEACTIVATE_PRINTMSG_INTERVAL 10601 602#define XPC_PARTID(_p) ((short)((_p) - &xpc_partitions[0]))603 604/* found in xp_main.c */605extern struct xpc_registration xpc_registrations[];606 607/* found in xpc_main.c */608extern struct device *xpc_part;609extern struct device *xpc_chan;610extern struct xpc_arch_operations xpc_arch_ops;611extern int xpc_disengage_timelimit;612extern int xpc_disengage_timedout;613extern int xpc_activate_IRQ_rcvd;614extern spinlock_t xpc_activate_IRQ_rcvd_lock;615extern wait_queue_head_t xpc_activate_IRQ_wq;616extern void *xpc_kzalloc_cacheline_aligned(size_t, gfp_t, void **);617extern void xpc_activate_partition(struct xpc_partition *);618extern void xpc_activate_kthreads(struct xpc_channel *, int);619extern void xpc_create_kthreads(struct xpc_channel *, int, int);620extern void xpc_disconnect_wait(int);621 622/* found in xpc_uv.c */623extern int xpc_init_uv(void);624extern void xpc_exit_uv(void);625 626/* found in xpc_partition.c */627extern int xpc_exiting;628extern int xpc_nasid_mask_nlongs;629extern struct xpc_rsvd_page *xpc_rsvd_page;630extern unsigned long *xpc_mach_nasids;631extern struct xpc_partition *xpc_partitions;632extern void *xpc_kmalloc_cacheline_aligned(size_t, gfp_t, void **);633extern int xpc_setup_rsvd_page(void);634extern void xpc_teardown_rsvd_page(void);635extern int xpc_identify_activate_IRQ_sender(void);636extern int xpc_partition_disengaged(struct xpc_partition *);637extern int xpc_partition_disengaged_from_timer(struct xpc_partition *part);638extern enum xp_retval xpc_mark_partition_active(struct xpc_partition *);639extern void xpc_mark_partition_inactive(struct xpc_partition *);640extern void xpc_discovery(void);641extern enum xp_retval xpc_get_remote_rp(int, unsigned long *,642 struct xpc_rsvd_page *,643 unsigned long *);644extern void xpc_deactivate_partition(const int, struct xpc_partition *,645 enum xp_retval);646extern enum xp_retval xpc_initiate_partid_to_nasids(short, void *);647 648/* found in xpc_channel.c */649extern void xpc_initiate_connect(int);650extern void xpc_initiate_disconnect(int);651extern enum xp_retval xpc_allocate_msg_wait(struct xpc_channel *);652extern enum xp_retval xpc_initiate_send(short, int, u32, void *, u16);653extern enum xp_retval xpc_initiate_send_notify(short, int, u32, void *, u16,654 xpc_notify_func, void *);655extern void xpc_initiate_received(short, int, void *);656extern void xpc_process_sent_chctl_flags(struct xpc_partition *);657extern void xpc_connected_callout(struct xpc_channel *);658extern void xpc_deliver_payload(struct xpc_channel *);659extern void xpc_disconnect_channel(const int, struct xpc_channel *,660 enum xp_retval, unsigned long *);661extern void xpc_disconnect_callout(struct xpc_channel *, enum xp_retval);662extern void xpc_partition_going_down(struct xpc_partition *, enum xp_retval);663 664static inline void665xpc_wakeup_channel_mgr(struct xpc_partition *part)666{667 if (atomic_inc_return(&part->channel_mgr_requests) == 1)668 wake_up(&part->channel_mgr_wq);669}670 671/*672 * These next two inlines are used to keep us from tearing down a channel's673 * msg queues while a thread may be referencing them.674 */675static inline void676xpc_msgqueue_ref(struct xpc_channel *ch)677{678 atomic_inc(&ch->references);679}680 681static inline void682xpc_msgqueue_deref(struct xpc_channel *ch)683{684 s32 refs = atomic_dec_return(&ch->references);685 686 DBUG_ON(refs < 0);687 if (refs == 0)688 xpc_wakeup_channel_mgr(&xpc_partitions[ch->partid]);689}690 691#define XPC_DISCONNECT_CHANNEL(_ch, _reason, _irqflgs) \692 xpc_disconnect_channel(__LINE__, _ch, _reason, _irqflgs)693 694/*695 * These two inlines are used to keep us from tearing down a partition's696 * setup infrastructure while a thread may be referencing it.697 */698static inline void699xpc_part_deref(struct xpc_partition *part)700{701 s32 refs = atomic_dec_return(&part->references);702 703 DBUG_ON(refs < 0);704 if (refs == 0 && part->setup_state == XPC_P_SS_WTEARDOWN)705 wake_up(&part->teardown_wq);706}707 708static inline int709xpc_part_ref(struct xpc_partition *part)710{711 int setup;712 713 atomic_inc(&part->references);714 setup = (part->setup_state == XPC_P_SS_SETUP);715 if (!setup)716 xpc_part_deref(part);717 718 return setup;719}720 721/*722 * The following macro is to be used for the setting of the reason and723 * reason_line fields in both the struct xpc_channel and struct xpc_partition724 * structures.725 */726#define XPC_SET_REASON(_p, _reason, _line) \727 { \728 (_p)->reason = _reason; \729 (_p)->reason_line = _line; \730 }731 732#endif /* _DRIVERS_MISC_SGIXP_XPC_H */733