145d9ca49SDean Nelson /* 245d9ca49SDean Nelson * This file is subject to the terms and conditions of the GNU General Public 345d9ca49SDean Nelson * License. See the file "COPYING" in the main directory of this archive 445d9ca49SDean Nelson * for more details. 545d9ca49SDean Nelson * 645d9ca49SDean Nelson * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved. 745d9ca49SDean Nelson */ 845d9ca49SDean Nelson 945d9ca49SDean Nelson /* 1045d9ca49SDean Nelson * Cross Partition Communication (XPC) structures and macros. 1145d9ca49SDean Nelson */ 1245d9ca49SDean Nelson 1345d9ca49SDean Nelson #ifndef _DRIVERS_MISC_SGIXP_XPC_H 1445d9ca49SDean Nelson #define _DRIVERS_MISC_SGIXP_XPC_H 1545d9ca49SDean Nelson 1645d9ca49SDean Nelson #include <linux/interrupt.h> 1745d9ca49SDean Nelson #include <linux/sysctl.h> 1845d9ca49SDean Nelson #include <linux/device.h> 1945d9ca49SDean Nelson #include <linux/mutex.h> 2045d9ca49SDean Nelson #include <linux/completion.h> 2145d9ca49SDean Nelson #include <asm/pgtable.h> 2245d9ca49SDean Nelson #include <asm/processor.h> 2345d9ca49SDean Nelson #include <asm/sn/clksupport.h> 2445d9ca49SDean Nelson #include <asm/sn/addrs.h> 2545d9ca49SDean Nelson #include <asm/sn/mspec.h> 2645d9ca49SDean Nelson #include <asm/sn/shub_mmr.h> 2745d9ca49SDean Nelson #include "xp.h" 2845d9ca49SDean Nelson 2945d9ca49SDean Nelson /* 3045d9ca49SDean Nelson * XPC Version numbers consist of a major and minor number. XPC can always 3145d9ca49SDean Nelson * talk to versions with same major #, and never talk to versions with a 3245d9ca49SDean Nelson * different major #. 3345d9ca49SDean Nelson */ 3445d9ca49SDean Nelson #define _XPC_VERSION(_maj, _min) (((_maj) << 4) | ((_min) & 0xf)) 3545d9ca49SDean Nelson #define XPC_VERSION_MAJOR(_v) ((_v) >> 4) 3645d9ca49SDean Nelson #define XPC_VERSION_MINOR(_v) ((_v) & 0xf) 3745d9ca49SDean Nelson 3845d9ca49SDean Nelson /* 3945d9ca49SDean Nelson * The next macros define word or bit representations for given 4045d9ca49SDean Nelson * C-brick nasid in either the SAL provided bit array representing 4145d9ca49SDean Nelson * nasids in the partition/machine or the AMO_t array used for 4245d9ca49SDean Nelson * inter-partition initiation communications. 4345d9ca49SDean Nelson * 4445d9ca49SDean Nelson * For SN2 machines, C-Bricks are alway even numbered NASIDs. As 4545d9ca49SDean Nelson * such, some space will be saved by insisting that nasid information 4645d9ca49SDean Nelson * passed from SAL always be packed for C-Bricks and the 4745d9ca49SDean Nelson * cross-partition interrupts use the same packing scheme. 4845d9ca49SDean Nelson */ 4945d9ca49SDean Nelson #define XPC_NASID_W_INDEX(_n) (((_n) / 64) / 2) 5045d9ca49SDean Nelson #define XPC_NASID_B_INDEX(_n) (((_n) / 2) & (64 - 1)) 5145d9ca49SDean Nelson #define XPC_NASID_IN_ARRAY(_n, _p) ((_p)[XPC_NASID_W_INDEX(_n)] & \ 5245d9ca49SDean Nelson (1UL << XPC_NASID_B_INDEX(_n))) 5345d9ca49SDean Nelson #define XPC_NASID_FROM_W_B(_w, _b) (((_w) * 64 + (_b)) * 2) 5445d9ca49SDean Nelson 5545d9ca49SDean Nelson #define XPC_HB_DEFAULT_INTERVAL 5 /* incr HB every x secs */ 5645d9ca49SDean Nelson #define XPC_HB_CHECK_DEFAULT_INTERVAL 20 /* check HB every x secs */ 5745d9ca49SDean Nelson 5845d9ca49SDean Nelson /* define the process name of HB checker and the CPU it is pinned to */ 5945d9ca49SDean Nelson #define XPC_HB_CHECK_THREAD_NAME "xpc_hb" 6045d9ca49SDean Nelson #define XPC_HB_CHECK_CPU 0 6145d9ca49SDean Nelson 6245d9ca49SDean Nelson /* define the process name of the discovery thread */ 6345d9ca49SDean Nelson #define XPC_DISCOVERY_THREAD_NAME "xpc_discovery" 6445d9ca49SDean Nelson 6545d9ca49SDean Nelson /* 6645d9ca49SDean Nelson * the reserved page 6745d9ca49SDean Nelson * 6845d9ca49SDean Nelson * SAL reserves one page of memory per partition for XPC. Though a full page 6945d9ca49SDean Nelson * in length (16384 bytes), its starting address is not page aligned, but it 7045d9ca49SDean Nelson * is cacheline aligned. The reserved page consists of the following: 7145d9ca49SDean Nelson * 7245d9ca49SDean Nelson * reserved page header 7345d9ca49SDean Nelson * 7494bd2708SDean Nelson * The first two 64-byte cachelines of the reserved page contain the 7594bd2708SDean Nelson * header (struct xpc_rsvd_page). Before SAL initialization has completed, 7645d9ca49SDean Nelson * SAL has set up the following fields of the reserved page header: 7794bd2708SDean Nelson * SAL_signature, SAL_version, SAL_partid, and SAL_nasids_size. The 7894bd2708SDean Nelson * other fields are set up by XPC. (xpc_rsvd_page points to the local 7945d9ca49SDean Nelson * partition's reserved page.) 8045d9ca49SDean Nelson * 8145d9ca49SDean Nelson * part_nasids mask 8245d9ca49SDean Nelson * mach_nasids mask 8345d9ca49SDean Nelson * 8445d9ca49SDean Nelson * SAL also sets up two bitmaps (or masks), one that reflects the actual 8545d9ca49SDean Nelson * nasids in this partition (part_nasids), and the other that reflects 8645d9ca49SDean Nelson * the actual nasids in the entire machine (mach_nasids). We're only 8745d9ca49SDean Nelson * interested in the even numbered nasids (which contain the processors 8845d9ca49SDean Nelson * and/or memory), so we only need half as many bits to represent the 8945d9ca49SDean Nelson * nasids. The part_nasids mask is located starting at the first cacheline 9045d9ca49SDean Nelson * following the reserved page header. The mach_nasids mask follows right 9145d9ca49SDean Nelson * after the part_nasids mask. The size in bytes of each mask is reflected 9294bd2708SDean Nelson * by the reserved page header field 'SAL_nasids_size'. (Local partition's 9345d9ca49SDean Nelson * mask pointers are xpc_part_nasids and xpc_mach_nasids.) 9445d9ca49SDean Nelson * 9594bd2708SDean Nelson * vars (ia64-sn2 only) 9694bd2708SDean Nelson * vars part (ia64-sn2 only) 9745d9ca49SDean Nelson * 9845d9ca49SDean Nelson * Immediately following the mach_nasids mask are the XPC variables 9945d9ca49SDean Nelson * required by other partitions. First are those that are generic to all 10045d9ca49SDean Nelson * partitions (vars), followed on the next available cacheline by those 10145d9ca49SDean Nelson * which are partition specific (vars part). These are setup by XPC. 10245d9ca49SDean Nelson * (Local partition's vars pointers are xpc_vars and xpc_vars_part.) 10345d9ca49SDean Nelson * 10494bd2708SDean Nelson * Note: Until 'stamp' is set non-zero, the partition XPC code has not been 10594bd2708SDean Nelson * initialized. 10645d9ca49SDean Nelson */ 10745d9ca49SDean Nelson struct xpc_rsvd_page { 10845d9ca49SDean Nelson u64 SAL_signature; /* SAL: unique signature */ 10945d9ca49SDean Nelson u64 SAL_version; /* SAL: version */ 11094bd2708SDean Nelson short SAL_partid; /* SAL: partition ID */ 11194bd2708SDean Nelson short max_npartitions; /* value of XPC_MAX_PARTITIONS */ 11245d9ca49SDean Nelson u8 version; 11394bd2708SDean Nelson u8 pad1[3]; /* align to next u64 in 1st 64-byte cacheline */ 11494bd2708SDean Nelson union { 1152c2b94f9SDean Nelson u64 vars_pa; /* physical address of struct xpc_vars */ 11694bd2708SDean Nelson u64 activate_mq_gpa; /* global phys address of activate_mq */ 11794bd2708SDean Nelson } sn; 118aaa3cd69SDean Nelson unsigned long stamp; /* time when reserved page was setup by XPC */ 119aaa3cd69SDean Nelson u64 pad2[10]; /* align to last u64 in 2nd 64-byte cacheline */ 12094bd2708SDean Nelson u64 SAL_nasids_size; /* SAL: size of each nasid mask in bytes */ 12145d9ca49SDean Nelson }; 12245d9ca49SDean Nelson 12394bd2708SDean Nelson #define XPC_RP_VERSION _XPC_VERSION(2, 0) /* version 2.0 of the reserved page */ 12445d9ca49SDean Nelson 12545d9ca49SDean Nelson #define XPC_SUPPORTS_RP_STAMP(_version) \ 12645d9ca49SDean Nelson (_version >= _XPC_VERSION(1, 1)) 12745d9ca49SDean Nelson 12845d9ca49SDean Nelson /* 12945d9ca49SDean Nelson * Define the structures by which XPC variables can be exported to other 13045d9ca49SDean Nelson * partitions. (There are two: struct xpc_vars and struct xpc_vars_part) 13145d9ca49SDean Nelson */ 13245d9ca49SDean Nelson 13345d9ca49SDean Nelson /* 13445d9ca49SDean Nelson * The following structure describes the partition generic variables 13545d9ca49SDean Nelson * needed by other partitions in order to properly initialize. 13645d9ca49SDean Nelson * 13745d9ca49SDean Nelson * struct xpc_vars version number also applies to struct xpc_vars_part. 13845d9ca49SDean Nelson * Changes to either structure and/or related functionality should be 13945d9ca49SDean Nelson * reflected by incrementing either the major or minor version numbers 14045d9ca49SDean Nelson * of struct xpc_vars. 14145d9ca49SDean Nelson */ 14233ba3c77SDean Nelson struct xpc_vars_sn2 { 14345d9ca49SDean Nelson u8 version; 14445d9ca49SDean Nelson u64 heartbeat; 14533ba3c77SDean Nelson DECLARE_BITMAP(heartbeating_to_mask, XP_MAX_NPARTITIONS_SN2); 14645d9ca49SDean Nelson u64 heartbeat_offline; /* if 0, heartbeat should be changing */ 14745d9ca49SDean Nelson int act_nasid; 14845d9ca49SDean Nelson int act_phys_cpuid; 14945d9ca49SDean Nelson u64 vars_part_pa; 15045d9ca49SDean Nelson u64 amos_page_pa; /* paddr of page of AMOs from MSPEC driver */ 15145d9ca49SDean Nelson AMO_t *amos_page; /* vaddr of page of AMOs from MSPEC driver */ 15245d9ca49SDean Nelson }; 15345d9ca49SDean Nelson 15445d9ca49SDean Nelson #define XPC_V_VERSION _XPC_VERSION(3, 1) /* version 3.1 of the cross vars */ 15545d9ca49SDean Nelson 15645d9ca49SDean Nelson #define XPC_SUPPORTS_DISENGAGE_REQUEST(_version) \ 15745d9ca49SDean Nelson (_version >= _XPC_VERSION(3, 1)) 15845d9ca49SDean Nelson 15945d9ca49SDean Nelson /* 16033ba3c77SDean Nelson * The following pertains to ia64-sn2 only. 16133ba3c77SDean Nelson * 16233ba3c77SDean Nelson * Memory for XPC's AMO variables is allocated by the MSPEC driver. These 16333ba3c77SDean Nelson * pages are located in the lowest granule. The lowest granule uses 4k pages 16433ba3c77SDean Nelson * for cached references and an alternate TLB handler to never provide a 16533ba3c77SDean Nelson * cacheable mapping for the entire region. This will prevent speculative 16633ba3c77SDean Nelson * reading of cached copies of our lines from being issued which will cause 16733ba3c77SDean Nelson * a PI FSB Protocol error to be generated by the SHUB. For XPC, we need 64 16833ba3c77SDean Nelson * AMO variables (based on XP_MAX_NPARTITIONS_SN2) to identify the senders of 16933ba3c77SDean Nelson * NOTIFY IRQs, 128 AMO variables (based on XP_NASID_MASK_WORDS) to identify 17033ba3c77SDean Nelson * the senders of ACTIVATE IRQs, and 2 AMO variables to identify which remote 17133ba3c77SDean Nelson * partitions (i.e., XPCs) consider themselves currently engaged with the 17233ba3c77SDean Nelson * local XPC. 17345d9ca49SDean Nelson */ 17445d9ca49SDean Nelson #define XPC_NOTIFY_IRQ_AMOS 0 175bc63d387SDean Nelson #define XPC_ACTIVATE_IRQ_AMOS (XPC_NOTIFY_IRQ_AMOS + XP_MAX_NPARTITIONS_SN2) 17645d9ca49SDean Nelson #define XPC_ENGAGED_PARTITIONS_AMO (XPC_ACTIVATE_IRQ_AMOS + XP_NASID_MASK_WORDS) 17745d9ca49SDean Nelson #define XPC_DISENGAGE_REQUEST_AMO (XPC_ENGAGED_PARTITIONS_AMO + 1) 17845d9ca49SDean Nelson 17945d9ca49SDean Nelson /* 18045d9ca49SDean Nelson * The following structure describes the per partition specific variables. 18145d9ca49SDean Nelson * 18245d9ca49SDean Nelson * An array of these structures, one per partition, will be defined. As a 18345d9ca49SDean Nelson * partition becomes active XPC will copy the array entry corresponding to 18494bd2708SDean Nelson * itself from that partition. It is desirable that the size of this structure 18594bd2708SDean Nelson * evenly divides into a 128-byte cacheline, such that none of the entries in 18694bd2708SDean Nelson * this array crosses a 128-byte cacheline boundary. As it is now, each entry 187e17d416bSDean Nelson * occupies 64-bytes. 18845d9ca49SDean Nelson */ 189e17d416bSDean Nelson struct xpc_vars_part_sn2 { 1902c2b94f9SDean Nelson u64 magic; 19145d9ca49SDean Nelson 19245d9ca49SDean Nelson u64 openclose_args_pa; /* physical address of open and close args */ 19345d9ca49SDean Nelson u64 GPs_pa; /* physical address of Get/Put values */ 19445d9ca49SDean Nelson 19545d9ca49SDean Nelson u64 IPI_amo_pa; /* physical address of IPI AMO_t structure */ 19645d9ca49SDean Nelson int IPI_nasid; /* nasid of where to send IPIs */ 19745d9ca49SDean Nelson int IPI_phys_cpuid; /* physical CPU ID of where to send IPIs */ 19845d9ca49SDean Nelson 19945d9ca49SDean Nelson u8 nchannels; /* #of defined channels supported */ 20045d9ca49SDean Nelson 20145d9ca49SDean Nelson u8 reserved[23]; /* pad to a full 64 bytes */ 20245d9ca49SDean Nelson }; 20345d9ca49SDean Nelson 20445d9ca49SDean Nelson /* 20545d9ca49SDean Nelson * The vars_part MAGIC numbers play a part in the first contact protocol. 20645d9ca49SDean Nelson * 20745d9ca49SDean Nelson * MAGIC1 indicates that the per partition specific variables for a remote 20845d9ca49SDean Nelson * partition have been initialized by this partition. 20945d9ca49SDean Nelson * 21045d9ca49SDean Nelson * MAGIC2 indicates that this partition has pulled the remote partititions 21145d9ca49SDean Nelson * per partition variables that pertain to this partition. 21245d9ca49SDean Nelson */ 21345d9ca49SDean Nelson #define XPC_VP_MAGIC1 0x0053524156435058L /* 'XPCVARS\0'L (little endian) */ 21445d9ca49SDean Nelson #define XPC_VP_MAGIC2 0x0073726176435058L /* 'XPCvars\0'L (little endian) */ 21545d9ca49SDean Nelson 21645d9ca49SDean Nelson /* the reserved page sizes and offsets */ 21745d9ca49SDean Nelson 21845d9ca49SDean Nelson #define XPC_RP_HEADER_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_rsvd_page)) 21933ba3c77SDean Nelson #define XPC_RP_VARS_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_vars_sn2)) 22045d9ca49SDean Nelson 2212c2b94f9SDean Nelson #define XPC_RP_PART_NASIDS(_rp) ((u64 *)((u8 *)(_rp) + XPC_RP_HEADER_SIZE)) 22245d9ca49SDean Nelson #define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + xp_nasid_mask_words) 22333ba3c77SDean Nelson #define XPC_RP_VARS(_rp) ((struct xpc_vars_sn2 *)(XPC_RP_MACH_NASIDS(_rp) + \ 2242c2b94f9SDean Nelson xp_nasid_mask_words)) 22545d9ca49SDean Nelson 22645d9ca49SDean Nelson /* 22745d9ca49SDean Nelson * Functions registered by add_timer() or called by kernel_thread() only 22845d9ca49SDean Nelson * allow for a single 64-bit argument. The following macros can be used to 22945d9ca49SDean Nelson * pack and unpack two (32-bit, 16-bit or 8-bit) arguments into or out from 23045d9ca49SDean Nelson * the passed argument. 23145d9ca49SDean Nelson */ 23245d9ca49SDean Nelson #define XPC_PACK_ARGS(_arg1, _arg2) \ 23345d9ca49SDean Nelson ((((u64) _arg1) & 0xffffffff) | \ 23445d9ca49SDean Nelson ((((u64) _arg2) & 0xffffffff) << 32)) 23545d9ca49SDean Nelson 23645d9ca49SDean Nelson #define XPC_UNPACK_ARG1(_args) (((u64) _args) & 0xffffffff) 23745d9ca49SDean Nelson #define XPC_UNPACK_ARG2(_args) ((((u64) _args) >> 32) & 0xffffffff) 23845d9ca49SDean Nelson 23945d9ca49SDean Nelson /* 24045d9ca49SDean Nelson * Define a Get/Put value pair (pointers) used with a message queue. 24145d9ca49SDean Nelson */ 24245d9ca49SDean Nelson struct xpc_gp { 2432c2b94f9SDean Nelson s64 get; /* Get value */ 2442c2b94f9SDean Nelson s64 put; /* Put value */ 24545d9ca49SDean Nelson }; 24645d9ca49SDean Nelson 24745d9ca49SDean Nelson #define XPC_GP_SIZE \ 248bc63d387SDean Nelson L1_CACHE_ALIGN(sizeof(struct xpc_gp) * XPC_MAX_NCHANNELS) 24945d9ca49SDean Nelson 25045d9ca49SDean Nelson /* 25145d9ca49SDean Nelson * Define a structure that contains arguments associated with opening and 25245d9ca49SDean Nelson * closing a channel. 25345d9ca49SDean Nelson */ 25445d9ca49SDean Nelson struct xpc_openclose_args { 25545d9ca49SDean Nelson u16 reason; /* reason why channel is closing */ 25645d9ca49SDean Nelson u16 msg_size; /* sizeof each message entry */ 25745d9ca49SDean Nelson u16 remote_nentries; /* #of message entries in remote msg queue */ 25845d9ca49SDean Nelson u16 local_nentries; /* #of message entries in local msg queue */ 25945d9ca49SDean Nelson u64 local_msgqueue_pa; /* physical address of local message queue */ 26045d9ca49SDean Nelson }; 26145d9ca49SDean Nelson 26245d9ca49SDean Nelson #define XPC_OPENCLOSE_ARGS_SIZE \ 263bc63d387SDean Nelson L1_CACHE_ALIGN(sizeof(struct xpc_openclose_args) * \ 264bc63d387SDean Nelson XPC_MAX_NCHANNELS) 26545d9ca49SDean Nelson 26645d9ca49SDean Nelson /* struct xpc_msg flags */ 26745d9ca49SDean Nelson 26845d9ca49SDean Nelson #define XPC_M_DONE 0x01 /* msg has been received/consumed */ 26945d9ca49SDean Nelson #define XPC_M_READY 0x02 /* msg is ready to be sent */ 27045d9ca49SDean Nelson #define XPC_M_INTERRUPT 0x04 /* send interrupt when msg consumed */ 27145d9ca49SDean Nelson 27245d9ca49SDean Nelson #define XPC_MSG_ADDRESS(_payload) \ 27345d9ca49SDean Nelson ((struct xpc_msg *)((u8 *)(_payload) - XPC_MSG_PAYLOAD_OFFSET)) 27445d9ca49SDean Nelson 27545d9ca49SDean Nelson /* 27645d9ca49SDean Nelson * Defines notify entry. 27745d9ca49SDean Nelson * 27845d9ca49SDean Nelson * This is used to notify a message's sender that their message was received 27945d9ca49SDean Nelson * and consumed by the intended recipient. 28045d9ca49SDean Nelson */ 28145d9ca49SDean Nelson struct xpc_notify { 2822c2b94f9SDean Nelson u8 type; /* type of notification */ 28345d9ca49SDean Nelson 28445d9ca49SDean Nelson /* the following two fields are only used if type == XPC_N_CALL */ 28545d9ca49SDean Nelson xpc_notify_func func; /* user's notify function */ 28645d9ca49SDean Nelson void *key; /* pointer to user's key */ 28745d9ca49SDean Nelson }; 28845d9ca49SDean Nelson 28945d9ca49SDean Nelson /* struct xpc_notify type of notification */ 29045d9ca49SDean Nelson 29145d9ca49SDean Nelson #define XPC_N_CALL 0x01 /* notify function provided by user */ 29245d9ca49SDean Nelson 29345d9ca49SDean Nelson /* 29445d9ca49SDean Nelson * Define the structure that manages all the stuff required by a channel. In 29545d9ca49SDean Nelson * particular, they are used to manage the messages sent across the channel. 29645d9ca49SDean Nelson * 29745d9ca49SDean Nelson * This structure is private to a partition, and is NOT shared across the 29845d9ca49SDean Nelson * partition boundary. 29945d9ca49SDean Nelson * 30045d9ca49SDean Nelson * There is an array of these structures for each remote partition. It is 30145d9ca49SDean Nelson * allocated at the time a partition becomes active. The array contains one 30245d9ca49SDean Nelson * of these structures for each potential channel connection to that partition. 30345d9ca49SDean Nelson * 30433ba3c77SDean Nelson >>> sn2 only!!! 30545d9ca49SDean Nelson * Each of these structures manages two message queues (circular buffers). 30645d9ca49SDean Nelson * They are allocated at the time a channel connection is made. One of 30745d9ca49SDean Nelson * these message queues (local_msgqueue) holds the locally created messages 30845d9ca49SDean Nelson * that are destined for the remote partition. The other of these message 30945d9ca49SDean Nelson * queues (remote_msgqueue) is a locally cached copy of the remote partition's 31045d9ca49SDean Nelson * own local_msgqueue. 31145d9ca49SDean Nelson * 31245d9ca49SDean Nelson * The following is a description of the Get/Put pointers used to manage these 31345d9ca49SDean Nelson * two message queues. Consider the local_msgqueue to be on one partition 31445d9ca49SDean Nelson * and the remote_msgqueue to be its cached copy on another partition. A 31545d9ca49SDean Nelson * description of what each of the lettered areas contains is included. 31645d9ca49SDean Nelson * 31745d9ca49SDean Nelson * 31845d9ca49SDean Nelson * local_msgqueue remote_msgqueue 31945d9ca49SDean Nelson * 32045d9ca49SDean Nelson * |/////////| |/////////| 32145d9ca49SDean Nelson * w_remote_GP.get --> +---------+ |/////////| 32245d9ca49SDean Nelson * | F | |/////////| 32345d9ca49SDean Nelson * remote_GP.get --> +---------+ +---------+ <-- local_GP->get 32445d9ca49SDean Nelson * | | | | 32545d9ca49SDean Nelson * | | | E | 32645d9ca49SDean Nelson * | | | | 32745d9ca49SDean Nelson * | | +---------+ <-- w_local_GP.get 32845d9ca49SDean Nelson * | B | |/////////| 32945d9ca49SDean Nelson * | | |////D////| 33045d9ca49SDean Nelson * | | |/////////| 33145d9ca49SDean Nelson * | | +---------+ <-- w_remote_GP.put 33245d9ca49SDean Nelson * | | |////C////| 33345d9ca49SDean Nelson * local_GP->put --> +---------+ +---------+ <-- remote_GP.put 33445d9ca49SDean Nelson * | | |/////////| 33545d9ca49SDean Nelson * | A | |/////////| 33645d9ca49SDean Nelson * | | |/////////| 33745d9ca49SDean Nelson * w_local_GP.put --> +---------+ |/////////| 33845d9ca49SDean Nelson * |/////////| |/////////| 33945d9ca49SDean Nelson * 34045d9ca49SDean Nelson * 34145d9ca49SDean Nelson * ( remote_GP.[get|put] are cached copies of the remote 34245d9ca49SDean Nelson * partition's local_GP->[get|put], and thus their values can 34345d9ca49SDean Nelson * lag behind their counterparts on the remote partition. ) 34445d9ca49SDean Nelson * 34545d9ca49SDean Nelson * 34645d9ca49SDean Nelson * A - Messages that have been allocated, but have not yet been sent to the 34745d9ca49SDean Nelson * remote partition. 34845d9ca49SDean Nelson * 34945d9ca49SDean Nelson * B - Messages that have been sent, but have not yet been acknowledged by the 35045d9ca49SDean Nelson * remote partition as having been received. 35145d9ca49SDean Nelson * 35245d9ca49SDean Nelson * C - Area that needs to be prepared for the copying of sent messages, by 35345d9ca49SDean Nelson * the clearing of the message flags of any previously received messages. 35445d9ca49SDean Nelson * 35545d9ca49SDean Nelson * D - Area into which sent messages are to be copied from the remote 35645d9ca49SDean Nelson * partition's local_msgqueue and then delivered to their intended 35745d9ca49SDean Nelson * recipients. [ To allow for a multi-message copy, another pointer 35845d9ca49SDean Nelson * (next_msg_to_pull) has been added to keep track of the next message 35945d9ca49SDean Nelson * number needing to be copied (pulled). It chases after w_remote_GP.put. 36045d9ca49SDean Nelson * Any messages lying between w_local_GP.get and next_msg_to_pull have 36145d9ca49SDean Nelson * been copied and are ready to be delivered. ] 36245d9ca49SDean Nelson * 36345d9ca49SDean Nelson * E - Messages that have been copied and delivered, but have not yet been 36445d9ca49SDean Nelson * acknowledged by the recipient as having been received. 36545d9ca49SDean Nelson * 36645d9ca49SDean Nelson * F - Messages that have been acknowledged, but XPC has not yet notified the 36745d9ca49SDean Nelson * sender that the message was received by its intended recipient. 36845d9ca49SDean Nelson * This is also an area that needs to be prepared for the allocating of 36945d9ca49SDean Nelson * new messages, by the clearing of the message flags of the acknowledged 37045d9ca49SDean Nelson * messages. 37145d9ca49SDean Nelson */ 37245d9ca49SDean Nelson struct xpc_channel { 37364d032baSDean Nelson short partid; /* ID of remote partition connected */ 37445d9ca49SDean Nelson spinlock_t lock; /* lock for updating this structure */ 37545d9ca49SDean Nelson u32 flags; /* general flags */ 37645d9ca49SDean Nelson 37765c17b80SDean Nelson enum xp_retval reason; /* reason why channel is disconnect'g */ 37845d9ca49SDean Nelson int reason_line; /* line# disconnect initiated from */ 37945d9ca49SDean Nelson 38045d9ca49SDean Nelson u16 number; /* channel # */ 38145d9ca49SDean Nelson 38245d9ca49SDean Nelson u16 msg_size; /* sizeof each msg entry */ 38345d9ca49SDean Nelson u16 local_nentries; /* #of msg entries in local msg queue */ 38445d9ca49SDean Nelson u16 remote_nentries; /* #of msg entries in remote msg queue */ 38545d9ca49SDean Nelson 38645d9ca49SDean Nelson void *local_msgqueue_base; /* base address of kmalloc'd space */ 38745d9ca49SDean Nelson struct xpc_msg *local_msgqueue; /* local message queue */ 38845d9ca49SDean Nelson void *remote_msgqueue_base; /* base address of kmalloc'd space */ 38945d9ca49SDean Nelson struct xpc_msg *remote_msgqueue; /* cached copy of remote partition's */ 39045d9ca49SDean Nelson /* local message queue */ 39145d9ca49SDean Nelson u64 remote_msgqueue_pa; /* phys addr of remote partition's */ 39245d9ca49SDean Nelson /* local message queue */ 39345d9ca49SDean Nelson 39445d9ca49SDean Nelson atomic_t references; /* #of external references to queues */ 39545d9ca49SDean Nelson 39645d9ca49SDean Nelson atomic_t n_on_msg_allocate_wq; /* #on msg allocation wait queue */ 39745d9ca49SDean Nelson wait_queue_head_t msg_allocate_wq; /* msg allocation wait queue */ 39845d9ca49SDean Nelson 39945d9ca49SDean Nelson u8 delayed_IPI_flags; /* IPI flags received, but delayed */ 40045d9ca49SDean Nelson /* action until channel disconnected */ 40145d9ca49SDean Nelson 40245d9ca49SDean Nelson /* queue of msg senders who want to be notified when msg received */ 40345d9ca49SDean Nelson 40445d9ca49SDean Nelson atomic_t n_to_notify; /* #of msg senders to notify */ 40545d9ca49SDean Nelson struct xpc_notify *notify_queue; /* notify queue for messages sent */ 40645d9ca49SDean Nelson 40745d9ca49SDean Nelson xpc_channel_func func; /* user's channel function */ 40845d9ca49SDean Nelson void *key; /* pointer to user's key */ 40945d9ca49SDean Nelson 41045d9ca49SDean Nelson struct mutex msg_to_pull_mutex; /* next msg to pull serialization */ 41145d9ca49SDean Nelson struct completion wdisconnect_wait; /* wait for channel disconnect */ 41245d9ca49SDean Nelson 41345d9ca49SDean Nelson struct xpc_openclose_args *local_openclose_args; /* args passed on */ 41445d9ca49SDean Nelson /* opening or closing of channel */ 41545d9ca49SDean Nelson 41645d9ca49SDean Nelson /* various flavors of local and remote Get/Put values */ 41745d9ca49SDean Nelson 41845d9ca49SDean Nelson struct xpc_gp *local_GP; /* local Get/Put values */ 41945d9ca49SDean Nelson struct xpc_gp remote_GP; /* remote Get/Put values */ 42045d9ca49SDean Nelson struct xpc_gp w_local_GP; /* working local Get/Put values */ 42145d9ca49SDean Nelson struct xpc_gp w_remote_GP; /* working remote Get/Put values */ 42245d9ca49SDean Nelson s64 next_msg_to_pull; /* Put value of next msg to pull */ 42345d9ca49SDean Nelson 42445d9ca49SDean Nelson /* kthread management related fields */ 42545d9ca49SDean Nelson 42645d9ca49SDean Nelson atomic_t kthreads_assigned; /* #of kthreads assigned to channel */ 42745d9ca49SDean Nelson u32 kthreads_assigned_limit; /* limit on #of kthreads assigned */ 42845d9ca49SDean Nelson atomic_t kthreads_idle; /* #of kthreads idle waiting for work */ 42945d9ca49SDean Nelson u32 kthreads_idle_limit; /* limit on #of kthreads idle */ 43045d9ca49SDean Nelson atomic_t kthreads_active; /* #of kthreads actively working */ 43145d9ca49SDean Nelson 43245d9ca49SDean Nelson wait_queue_head_t idle_wq; /* idle kthread wait queue */ 43345d9ca49SDean Nelson 43445d9ca49SDean Nelson } ____cacheline_aligned; 43545d9ca49SDean Nelson 43645d9ca49SDean Nelson /* struct xpc_channel flags */ 43745d9ca49SDean Nelson 43845d9ca49SDean Nelson #define XPC_C_WASCONNECTED 0x00000001 /* channel was connected */ 43945d9ca49SDean Nelson 44045d9ca49SDean Nelson #define XPC_C_ROPENREPLY 0x00000002 /* remote open channel reply */ 44145d9ca49SDean Nelson #define XPC_C_OPENREPLY 0x00000004 /* local open channel reply */ 44245d9ca49SDean Nelson #define XPC_C_ROPENREQUEST 0x00000008 /* remote open channel request */ 44345d9ca49SDean Nelson #define XPC_C_OPENREQUEST 0x00000010 /* local open channel request */ 44445d9ca49SDean Nelson 44545d9ca49SDean Nelson #define XPC_C_SETUP 0x00000020 /* channel's msgqueues are alloc'd */ 44645d9ca49SDean Nelson #define XPC_C_CONNECTEDCALLOUT 0x00000040 /* connected callout initiated */ 44745d9ca49SDean Nelson #define XPC_C_CONNECTEDCALLOUT_MADE \ 44845d9ca49SDean Nelson 0x00000080 /* connected callout completed */ 44945d9ca49SDean Nelson #define XPC_C_CONNECTED 0x00000100 /* local channel is connected */ 45045d9ca49SDean Nelson #define XPC_C_CONNECTING 0x00000200 /* channel is being connected */ 45145d9ca49SDean Nelson 45245d9ca49SDean Nelson #define XPC_C_RCLOSEREPLY 0x00000400 /* remote close channel reply */ 45345d9ca49SDean Nelson #define XPC_C_CLOSEREPLY 0x00000800 /* local close channel reply */ 45445d9ca49SDean Nelson #define XPC_C_RCLOSEREQUEST 0x00001000 /* remote close channel request */ 45545d9ca49SDean Nelson #define XPC_C_CLOSEREQUEST 0x00002000 /* local close channel request */ 45645d9ca49SDean Nelson 45745d9ca49SDean Nelson #define XPC_C_DISCONNECTED 0x00004000 /* channel is disconnected */ 45845d9ca49SDean Nelson #define XPC_C_DISCONNECTING 0x00008000 /* channel is being disconnected */ 45945d9ca49SDean Nelson #define XPC_C_DISCONNECTINGCALLOUT \ 46045d9ca49SDean Nelson 0x00010000 /* disconnecting callout initiated */ 46145d9ca49SDean Nelson #define XPC_C_DISCONNECTINGCALLOUT_MADE \ 46245d9ca49SDean Nelson 0x00020000 /* disconnecting callout completed */ 46345d9ca49SDean Nelson #define XPC_C_WDISCONNECT 0x00040000 /* waiting for channel disconnect */ 46445d9ca49SDean Nelson 46545d9ca49SDean Nelson /* 46645d9ca49SDean Nelson * Manages channels on a partition basis. There is one of these structures 46745d9ca49SDean Nelson * for each partition (a partition will never utilize the structure that 46845d9ca49SDean Nelson * represents itself). 46945d9ca49SDean Nelson */ 47045d9ca49SDean Nelson struct xpc_partition { 47145d9ca49SDean Nelson 47245d9ca49SDean Nelson /* XPC HB infrastructure */ 47345d9ca49SDean Nelson 47445d9ca49SDean Nelson u8 remote_rp_version; /* version# of partition's rsvd pg */ 475aaa3cd69SDean Nelson unsigned long remote_rp_stamp; /* time when rsvd pg was initialized */ 47645d9ca49SDean Nelson u64 remote_rp_pa; /* phys addr of partition's rsvd pg */ 47745d9ca49SDean Nelson u64 remote_vars_pa; /* phys addr of partition's vars */ 47845d9ca49SDean Nelson u64 remote_vars_part_pa; /* phys addr of partition's vars part */ 47945d9ca49SDean Nelson u64 last_heartbeat; /* HB at last read */ 48045d9ca49SDean Nelson u64 remote_amos_page_pa; /* phys addr of partition's amos page */ 48145d9ca49SDean Nelson int remote_act_nasid; /* active part's act/deact nasid */ 48245d9ca49SDean Nelson int remote_act_phys_cpuid; /* active part's act/deact phys cpuid */ 48345d9ca49SDean Nelson u32 act_IRQ_rcvd; /* IRQs since activation */ 48445d9ca49SDean Nelson spinlock_t act_lock; /* protect updating of act_state */ 48545d9ca49SDean Nelson u8 act_state; /* from XPC HB viewpoint */ 48645d9ca49SDean Nelson u8 remote_vars_version; /* version# of partition's vars */ 48765c17b80SDean Nelson enum xp_retval reason; /* reason partition is deactivating */ 48845d9ca49SDean Nelson int reason_line; /* line# deactivation initiated from */ 48945d9ca49SDean Nelson int reactivate_nasid; /* nasid in partition to reactivate */ 49045d9ca49SDean Nelson 49145d9ca49SDean Nelson unsigned long disengage_request_timeout; /* timeout in jiffies */ 49245d9ca49SDean Nelson struct timer_list disengage_request_timer; 49345d9ca49SDean Nelson 49445d9ca49SDean Nelson /* XPC infrastructure referencing and teardown control */ 49545d9ca49SDean Nelson 4962c2b94f9SDean Nelson u8 setup_state; /* infrastructure setup state */ 49745d9ca49SDean Nelson wait_queue_head_t teardown_wq; /* kthread waiting to teardown infra */ 49845d9ca49SDean Nelson atomic_t references; /* #of references to infrastructure */ 49945d9ca49SDean Nelson 50045d9ca49SDean Nelson u8 nchannels; /* #of defined channels supported */ 50145d9ca49SDean Nelson atomic_t nchannels_active; /* #of channels that are not DISCONNECTED */ 50245d9ca49SDean Nelson atomic_t nchannels_engaged; /* #of channels engaged with remote part */ 50345d9ca49SDean Nelson struct xpc_channel *channels; /* array of channel structures */ 50445d9ca49SDean Nelson 50545d9ca49SDean Nelson void *local_GPs_base; /* base address of kmalloc'd space */ 50645d9ca49SDean Nelson struct xpc_gp *local_GPs; /* local Get/Put values */ 50745d9ca49SDean Nelson void *remote_GPs_base; /* base address of kmalloc'd space */ 5082c2b94f9SDean Nelson struct xpc_gp *remote_GPs; /* copy of remote partition's local */ 5092c2b94f9SDean Nelson /* Get/Put values */ 51045d9ca49SDean Nelson u64 remote_GPs_pa; /* phys address of remote partition's local */ 51145d9ca49SDean Nelson /* Get/Put values */ 51245d9ca49SDean Nelson 51345d9ca49SDean Nelson /* fields used to pass args when opening or closing a channel */ 51445d9ca49SDean Nelson 51545d9ca49SDean Nelson void *local_openclose_args_base; /* base address of kmalloc'd space */ 51645d9ca49SDean Nelson struct xpc_openclose_args *local_openclose_args; /* local's args */ 51745d9ca49SDean Nelson void *remote_openclose_args_base; /* base address of kmalloc'd space */ 51845d9ca49SDean Nelson struct xpc_openclose_args *remote_openclose_args; /* copy of remote's */ 51945d9ca49SDean Nelson /* args */ 52045d9ca49SDean Nelson u64 remote_openclose_args_pa; /* phys addr of remote's args */ 52145d9ca49SDean Nelson 52245d9ca49SDean Nelson /* IPI sending, receiving and handling related fields */ 52345d9ca49SDean Nelson 52445d9ca49SDean Nelson int remote_IPI_nasid; /* nasid of where to send IPIs */ 52545d9ca49SDean Nelson int remote_IPI_phys_cpuid; /* phys CPU ID of where to send IPIs */ 52645d9ca49SDean Nelson AMO_t *remote_IPI_amo_va; /* address of remote IPI AMO_t structure */ 52745d9ca49SDean Nelson 52845d9ca49SDean Nelson AMO_t *local_IPI_amo_va; /* address of IPI AMO_t structure */ 52945d9ca49SDean Nelson u64 local_IPI_amo; /* IPI amo flags yet to be handled */ 53045d9ca49SDean Nelson char IPI_owner[8]; /* IPI owner's name */ 53145d9ca49SDean Nelson struct timer_list dropped_IPI_timer; /* dropped IPI timer */ 53245d9ca49SDean Nelson 53345d9ca49SDean Nelson spinlock_t IPI_lock; /* IPI handler lock */ 53445d9ca49SDean Nelson 53545d9ca49SDean Nelson /* channel manager related fields */ 53645d9ca49SDean Nelson 53745d9ca49SDean Nelson atomic_t channel_mgr_requests; /* #of requests to activate chan mgr */ 53845d9ca49SDean Nelson wait_queue_head_t channel_mgr_wq; /* channel mgr's wait queue */ 53945d9ca49SDean Nelson 54045d9ca49SDean Nelson } ____cacheline_aligned; 54145d9ca49SDean Nelson 54245d9ca49SDean Nelson /* struct xpc_partition act_state values (for XPC HB) */ 54345d9ca49SDean Nelson 54445d9ca49SDean Nelson #define XPC_P_INACTIVE 0x00 /* partition is not active */ 54545d9ca49SDean Nelson #define XPC_P_ACTIVATION_REQ 0x01 /* created thread to activate */ 54645d9ca49SDean Nelson #define XPC_P_ACTIVATING 0x02 /* activation thread started */ 54745d9ca49SDean Nelson #define XPC_P_ACTIVE 0x03 /* xpc_partition_up() was called */ 54845d9ca49SDean Nelson #define XPC_P_DEACTIVATING 0x04 /* partition deactivation initiated */ 54945d9ca49SDean Nelson 55045d9ca49SDean Nelson #define XPC_DEACTIVATE_PARTITION(_p, _reason) \ 55145d9ca49SDean Nelson xpc_deactivate_partition(__LINE__, (_p), (_reason)) 55245d9ca49SDean Nelson 55345d9ca49SDean Nelson /* struct xpc_partition setup_state values */ 55445d9ca49SDean Nelson 55545d9ca49SDean Nelson #define XPC_P_UNSET 0x00 /* infrastructure was never setup */ 55645d9ca49SDean Nelson #define XPC_P_SETUP 0x01 /* infrastructure is setup */ 55745d9ca49SDean Nelson #define XPC_P_WTEARDOWN 0x02 /* waiting to teardown infrastructure */ 55845d9ca49SDean Nelson #define XPC_P_TORNDOWN 0x03 /* infrastructure is torndown */ 55945d9ca49SDean Nelson 56045d9ca49SDean Nelson /* 56145d9ca49SDean Nelson * struct xpc_partition IPI_timer #of seconds to wait before checking for 56245d9ca49SDean Nelson * dropped IPIs. These occur whenever an IPI amo write doesn't complete until 56345d9ca49SDean Nelson * after the IPI was received. 56445d9ca49SDean Nelson */ 565e17d416bSDean Nelson #define XPC_P_DROPPED_IPI_WAIT_INTERVAL (0.25 * HZ) 56645d9ca49SDean Nelson 56745d9ca49SDean Nelson /* number of seconds to wait for other partitions to disengage */ 56845d9ca49SDean Nelson #define XPC_DISENGAGE_REQUEST_DEFAULT_TIMELIMIT 90 56945d9ca49SDean Nelson 57045d9ca49SDean Nelson /* interval in seconds to print 'waiting disengagement' messages */ 57145d9ca49SDean Nelson #define XPC_DISENGAGE_PRINTMSG_INTERVAL 10 57245d9ca49SDean Nelson 57364d032baSDean Nelson #define XPC_PARTID(_p) ((short)((_p) - &xpc_partitions[0])) 57445d9ca49SDean Nelson 57545d9ca49SDean Nelson /* found in xp_main.c */ 57645d9ca49SDean Nelson extern struct xpc_registration xpc_registrations[]; 57745d9ca49SDean Nelson 57845d9ca49SDean Nelson /* found in xpc_main.c */ 57945d9ca49SDean Nelson extern struct device *xpc_part; 58045d9ca49SDean Nelson extern struct device *xpc_chan; 58145d9ca49SDean Nelson extern int xpc_disengage_request_timelimit; 58245d9ca49SDean Nelson extern int xpc_disengage_request_timedout; 58333ba3c77SDean Nelson extern atomic_t xpc_act_IRQ_rcvd; 58433ba3c77SDean Nelson extern wait_queue_head_t xpc_act_IRQ_wq; 58533ba3c77SDean Nelson extern void *xpc_heartbeating_to_mask; 58645d9ca49SDean Nelson extern irqreturn_t xpc_notify_IRQ_handler(int, void *); 58745d9ca49SDean Nelson extern void xpc_dropped_IPI_check(struct xpc_partition *); 58845d9ca49SDean Nelson extern void xpc_activate_partition(struct xpc_partition *); 58945d9ca49SDean Nelson extern void xpc_activate_kthreads(struct xpc_channel *, int); 59045d9ca49SDean Nelson extern void xpc_create_kthreads(struct xpc_channel *, int, int); 59145d9ca49SDean Nelson extern void xpc_disconnect_wait(int); 59294bd2708SDean Nelson extern enum xp_retval (*xpc_rsvd_page_init) (struct xpc_rsvd_page *); 59333ba3c77SDean Nelson extern void (*xpc_heartbeat_init) (void); 59433ba3c77SDean Nelson extern void (*xpc_heartbeat_exit) (void); 59533ba3c77SDean Nelson extern void (*xpc_increment_heartbeat) (void); 59633ba3c77SDean Nelson extern void (*xpc_offline_heartbeat) (void); 59733ba3c77SDean Nelson extern void (*xpc_online_heartbeat) (void); 59833ba3c77SDean Nelson extern void (*xpc_check_remote_hb) (void); 599e17d416bSDean Nelson extern enum xp_retval (*xpc_make_first_contact) (struct xpc_partition *); 600e17d416bSDean Nelson extern u64 (*xpc_get_IPI_flags) (struct xpc_partition *); 601e17d416bSDean Nelson extern struct xpc_msg *(*xpc_get_deliverable_msg) (struct xpc_channel *); 60233ba3c77SDean Nelson extern void (*xpc_initiate_partition_activation) (struct xpc_rsvd_page *, u64, 60333ba3c77SDean Nelson int); 60433ba3c77SDean Nelson extern void (*xpc_process_act_IRQ_rcvd) (int); 605e17d416bSDean Nelson extern enum xp_retval (*xpc_setup_infrastructure) (struct xpc_partition *); 606e17d416bSDean Nelson extern void (*xpc_teardown_infrastructure) (struct xpc_partition *); 60733ba3c77SDean Nelson extern void (*xpc_mark_partition_engaged) (struct xpc_partition *); 60833ba3c77SDean Nelson extern void (*xpc_mark_partition_disengaged) (struct xpc_partition *); 60933ba3c77SDean Nelson extern void (*xpc_request_partition_disengage) (struct xpc_partition *); 61033ba3c77SDean Nelson extern void (*xpc_cancel_partition_disengage_request) (struct xpc_partition *); 61133ba3c77SDean Nelson extern u64 (*xpc_partition_engaged) (u64); 61233ba3c77SDean Nelson extern u64 (*xpc_partition_disengage_requested) (u64);; 61333ba3c77SDean Nelson extern void (*xpc_clear_partition_engaged) (u64); 61433ba3c77SDean Nelson extern void (*xpc_clear_partition_disengage_request) (u64); 61533ba3c77SDean Nelson 61633ba3c77SDean Nelson extern void (*xpc_IPI_send_local_activate) (int); 61733ba3c77SDean Nelson extern void (*xpc_IPI_send_activated) (struct xpc_partition *); 61833ba3c77SDean Nelson extern void (*xpc_IPI_send_local_reactivate) (int); 61933ba3c77SDean Nelson extern void (*xpc_IPI_send_disengage) (struct xpc_partition *); 62033ba3c77SDean Nelson 62133ba3c77SDean Nelson extern void (*xpc_IPI_send_closerequest) (struct xpc_channel *, 62233ba3c77SDean Nelson unsigned long *); 62333ba3c77SDean Nelson extern void (*xpc_IPI_send_closereply) (struct xpc_channel *, unsigned long *); 62433ba3c77SDean Nelson extern void (*xpc_IPI_send_openrequest) (struct xpc_channel *, unsigned long *); 62533ba3c77SDean Nelson extern void (*xpc_IPI_send_openreply) (struct xpc_channel *, unsigned long *); 62633ba3c77SDean Nelson 62733ba3c77SDean Nelson extern enum xp_retval (*xpc_allocate_msg) (struct xpc_channel *, u32, 62833ba3c77SDean Nelson struct xpc_msg **); 62933ba3c77SDean Nelson extern enum xp_retval (*xpc_send_msg) (struct xpc_channel *, struct xpc_msg *, 63033ba3c77SDean Nelson u8, xpc_notify_func, void *); 63133ba3c77SDean Nelson extern void (*xpc_received_msg) (struct xpc_channel *, struct xpc_msg *); 63294bd2708SDean Nelson 63394bd2708SDean Nelson /* found in xpc_sn2.c */ 63494bd2708SDean Nelson extern void xpc_init_sn2(void); 63594bd2708SDean Nelson 63694bd2708SDean Nelson /* found in xpc_uv.c */ 63794bd2708SDean Nelson extern void xpc_init_uv(void); 63894bd2708SDean Nelson 63945d9ca49SDean Nelson /* found in xpc_partition.c */ 64045d9ca49SDean Nelson extern int xpc_exiting; 64194bd2708SDean Nelson extern int xp_nasid_mask_words; 64245d9ca49SDean Nelson extern struct xpc_rsvd_page *xpc_rsvd_page; 64333ba3c77SDean Nelson extern u64 *xpc_mach_nasids; 644bc63d387SDean Nelson extern struct xpc_partition *xpc_partitions; 64545d9ca49SDean Nelson extern char *xpc_remote_copy_buffer; 64645d9ca49SDean Nelson extern void *xpc_remote_copy_buffer_base; 64745d9ca49SDean Nelson extern void *xpc_kmalloc_cacheline_aligned(size_t, gfp_t, void **); 64894bd2708SDean Nelson extern struct xpc_rsvd_page *xpc_setup_rsvd_page(void); 64945d9ca49SDean Nelson extern void xpc_allow_IPI_ops(void); 65045d9ca49SDean Nelson extern void xpc_restrict_IPI_ops(void); 65145d9ca49SDean Nelson extern int xpc_identify_act_IRQ_sender(void); 65245d9ca49SDean Nelson extern int xpc_partition_disengaged(struct xpc_partition *); 65365c17b80SDean Nelson extern enum xp_retval xpc_mark_partition_active(struct xpc_partition *); 65445d9ca49SDean Nelson extern void xpc_mark_partition_inactive(struct xpc_partition *); 65545d9ca49SDean Nelson extern void xpc_discovery(void); 65633ba3c77SDean Nelson extern enum xp_retval xpc_get_remote_rp(int, u64 *, struct xpc_rsvd_page *, 65733ba3c77SDean Nelson u64 *); 65845d9ca49SDean Nelson extern void xpc_deactivate_partition(const int, struct xpc_partition *, 65965c17b80SDean Nelson enum xp_retval); 66064d032baSDean Nelson extern enum xp_retval xpc_initiate_partid_to_nasids(short, void *); 66145d9ca49SDean Nelson 66245d9ca49SDean Nelson /* found in xpc_channel.c */ 663e17d416bSDean Nelson extern void *xpc_kzalloc_cacheline_aligned(size_t, gfp_t, void **); 66445d9ca49SDean Nelson extern void xpc_initiate_connect(int); 66545d9ca49SDean Nelson extern void xpc_initiate_disconnect(int); 66633ba3c77SDean Nelson extern enum xp_retval xpc_allocate_msg_wait(struct xpc_channel *); 66764d032baSDean Nelson extern enum xp_retval xpc_initiate_allocate(short, int, u32, void **); 66864d032baSDean Nelson extern enum xp_retval xpc_initiate_send(short, int, void *); 66964d032baSDean Nelson extern enum xp_retval xpc_initiate_send_notify(short, int, void *, 67045d9ca49SDean Nelson xpc_notify_func, void *); 67164d032baSDean Nelson extern void xpc_initiate_received(short, int, void *); 67245d9ca49SDean Nelson extern void xpc_process_channel_activity(struct xpc_partition *); 67345d9ca49SDean Nelson extern void xpc_connected_callout(struct xpc_channel *); 67445d9ca49SDean Nelson extern void xpc_deliver_msg(struct xpc_channel *); 67545d9ca49SDean Nelson extern void xpc_disconnect_channel(const int, struct xpc_channel *, 67665c17b80SDean Nelson enum xp_retval, unsigned long *); 67765c17b80SDean Nelson extern void xpc_disconnect_callout(struct xpc_channel *, enum xp_retval); 67865c17b80SDean Nelson extern void xpc_partition_going_down(struct xpc_partition *, enum xp_retval); 67945d9ca49SDean Nelson 68033ba3c77SDean Nelson static inline int 68133ba3c77SDean Nelson xpc_hb_allowed(short partid, void *heartbeating_to_mask) 68233ba3c77SDean Nelson { 68333ba3c77SDean Nelson return test_bit(partid, heartbeating_to_mask); 68433ba3c77SDean Nelson } 68533ba3c77SDean Nelson 68633ba3c77SDean Nelson static inline int 68733ba3c77SDean Nelson xpc_any_hbs_allowed(void) 68833ba3c77SDean Nelson { 68933ba3c77SDean Nelson DBUG_ON(xpc_heartbeating_to_mask == NULL); 69033ba3c77SDean Nelson return !bitmap_empty(xpc_heartbeating_to_mask, xp_max_npartitions); 69133ba3c77SDean Nelson } 69233ba3c77SDean Nelson 69333ba3c77SDean Nelson static inline void 69433ba3c77SDean Nelson xpc_allow_hb(short partid) 69533ba3c77SDean Nelson { 69633ba3c77SDean Nelson DBUG_ON(xpc_heartbeating_to_mask == NULL); 69733ba3c77SDean Nelson set_bit(partid, xpc_heartbeating_to_mask); 69833ba3c77SDean Nelson } 69933ba3c77SDean Nelson 70033ba3c77SDean Nelson static inline void 70133ba3c77SDean Nelson xpc_disallow_hb(short partid) 70233ba3c77SDean Nelson { 70333ba3c77SDean Nelson DBUG_ON(xpc_heartbeating_to_mask == NULL); 70433ba3c77SDean Nelson clear_bit(partid, xpc_heartbeating_to_mask); 70533ba3c77SDean Nelson } 70633ba3c77SDean Nelson 70733ba3c77SDean Nelson static inline void 70833ba3c77SDean Nelson xpc_disallow_all_hbs(void) 70933ba3c77SDean Nelson { 71033ba3c77SDean Nelson DBUG_ON(xpc_heartbeating_to_mask == NULL); 71133ba3c77SDean Nelson bitmap_zero(xpc_heartbeating_to_mask, xp_max_npartitions); 71233ba3c77SDean Nelson } 71333ba3c77SDean Nelson 71445d9ca49SDean Nelson static inline void 71545d9ca49SDean Nelson xpc_wakeup_channel_mgr(struct xpc_partition *part) 71645d9ca49SDean Nelson { 7172c2b94f9SDean Nelson if (atomic_inc_return(&part->channel_mgr_requests) == 1) 71845d9ca49SDean Nelson wake_up(&part->channel_mgr_wq); 71945d9ca49SDean Nelson } 72045d9ca49SDean Nelson 72145d9ca49SDean Nelson /* 72245d9ca49SDean Nelson * These next two inlines are used to keep us from tearing down a channel's 72345d9ca49SDean Nelson * msg queues while a thread may be referencing them. 72445d9ca49SDean Nelson */ 72545d9ca49SDean Nelson static inline void 72645d9ca49SDean Nelson xpc_msgqueue_ref(struct xpc_channel *ch) 72745d9ca49SDean Nelson { 72845d9ca49SDean Nelson atomic_inc(&ch->references); 72945d9ca49SDean Nelson } 73045d9ca49SDean Nelson 73145d9ca49SDean Nelson static inline void 73245d9ca49SDean Nelson xpc_msgqueue_deref(struct xpc_channel *ch) 73345d9ca49SDean Nelson { 73445d9ca49SDean Nelson s32 refs = atomic_dec_return(&ch->references); 73545d9ca49SDean Nelson 73645d9ca49SDean Nelson DBUG_ON(refs < 0); 7372c2b94f9SDean Nelson if (refs == 0) 73845d9ca49SDean Nelson xpc_wakeup_channel_mgr(&xpc_partitions[ch->partid]); 73945d9ca49SDean Nelson } 74045d9ca49SDean Nelson 74145d9ca49SDean Nelson #define XPC_DISCONNECT_CHANNEL(_ch, _reason, _irqflgs) \ 74245d9ca49SDean Nelson xpc_disconnect_channel(__LINE__, _ch, _reason, _irqflgs) 74345d9ca49SDean Nelson 74445d9ca49SDean Nelson /* 74545d9ca49SDean Nelson * These two inlines are used to keep us from tearing down a partition's 74645d9ca49SDean Nelson * setup infrastructure while a thread may be referencing it. 74745d9ca49SDean Nelson */ 74845d9ca49SDean Nelson static inline void 74945d9ca49SDean Nelson xpc_part_deref(struct xpc_partition *part) 75045d9ca49SDean Nelson { 75145d9ca49SDean Nelson s32 refs = atomic_dec_return(&part->references); 75245d9ca49SDean Nelson 75345d9ca49SDean Nelson DBUG_ON(refs < 0); 7542c2b94f9SDean Nelson if (refs == 0 && part->setup_state == XPC_P_WTEARDOWN) 75545d9ca49SDean Nelson wake_up(&part->teardown_wq); 75645d9ca49SDean Nelson } 75745d9ca49SDean Nelson 75845d9ca49SDean Nelson static inline int 75945d9ca49SDean Nelson xpc_part_ref(struct xpc_partition *part) 76045d9ca49SDean Nelson { 76145d9ca49SDean Nelson int setup; 76245d9ca49SDean Nelson 76345d9ca49SDean Nelson atomic_inc(&part->references); 76445d9ca49SDean Nelson setup = (part->setup_state == XPC_P_SETUP); 7652c2b94f9SDean Nelson if (!setup) 76645d9ca49SDean Nelson xpc_part_deref(part); 7672c2b94f9SDean Nelson 76845d9ca49SDean Nelson return setup; 76945d9ca49SDean Nelson } 77045d9ca49SDean Nelson 77145d9ca49SDean Nelson /* 77245d9ca49SDean Nelson * The following macro is to be used for the setting of the reason and 77345d9ca49SDean Nelson * reason_line fields in both the struct xpc_channel and struct xpc_partition 77445d9ca49SDean Nelson * structures. 77545d9ca49SDean Nelson */ 77645d9ca49SDean Nelson #define XPC_SET_REASON(_p, _reason, _line) \ 77745d9ca49SDean Nelson { \ 77845d9ca49SDean Nelson (_p)->reason = _reason; \ 77945d9ca49SDean Nelson (_p)->reason_line = _line; \ 78045d9ca49SDean Nelson } 78145d9ca49SDean Nelson 78245d9ca49SDean Nelson /* 78333ba3c77SDean Nelson * The sending and receiving of IPIs includes the setting of an >>>AMO variable 78445d9ca49SDean Nelson * to indicate the reason the IPI was sent. The 64-bit variable is divided 78545d9ca49SDean Nelson * up into eight bytes, ordered from right to left. Byte zero pertains to 78645d9ca49SDean Nelson * channel 0, byte one to channel 1, and so on. Each byte is described by 78745d9ca49SDean Nelson * the following IPI flags. 78845d9ca49SDean Nelson */ 78945d9ca49SDean Nelson 79045d9ca49SDean Nelson #define XPC_IPI_CLOSEREQUEST 0x01 79145d9ca49SDean Nelson #define XPC_IPI_CLOSEREPLY 0x02 79245d9ca49SDean Nelson #define XPC_IPI_OPENREQUEST 0x04 79345d9ca49SDean Nelson #define XPC_IPI_OPENREPLY 0x08 79445d9ca49SDean Nelson #define XPC_IPI_MSGREQUEST 0x10 79545d9ca49SDean Nelson 79633ba3c77SDean Nelson /* given an >>>AMO variable and a channel#, get its associated IPI flags */ 79745d9ca49SDean Nelson #define XPC_GET_IPI_FLAGS(_amo, _c) ((u8) (((_amo) >> ((_c) * 8)) & 0xff)) 79845d9ca49SDean Nelson #define XPC_SET_IPI_FLAGS(_amo, _c, _f) (_amo) |= ((u64) (_f) << ((_c) * 8)) 79945d9ca49SDean Nelson 8002c2b94f9SDean Nelson #define XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(_amo) ((_amo) & 0x0f0f0f0f0f0f0f0fUL) 8012c2b94f9SDean Nelson #define XPC_ANY_MSG_IPI_FLAGS_SET(_amo) ((_amo) & 0x1010101010101010UL) 80245d9ca49SDean Nelson 80345d9ca49SDean Nelson #endif /* _DRIVERS_MISC_SGIXP_XPC_H */ 804