1005 lines
36 KiB
C
1005 lines
36 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (c) 2004-2009 Silicon Graphics, Inc. All Rights Reserved.
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*/
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/*
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* Cross Partition Communication (XPC) structures and macros.
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*/
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#ifndef _DRIVERS_MISC_SGIXP_XPC_H
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#define _DRIVERS_MISC_SGIXP_XPC_H
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#include <linux/wait.h>
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#include <linux/completion.h>
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#include <linux/timer.h>
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#include <linux/sched.h>
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#include "xp.h"
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/*
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* XPC Version numbers consist of a major and minor number. XPC can always
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* talk to versions with same major #, and never talk to versions with a
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* different major #.
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*/
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#define _XPC_VERSION(_maj, _min) (((_maj) << 4) | ((_min) & 0xf))
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#define XPC_VERSION_MAJOR(_v) ((_v) >> 4)
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#define XPC_VERSION_MINOR(_v) ((_v) & 0xf)
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/* define frequency of the heartbeat and frequency how often it's checked */
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#define XPC_HB_DEFAULT_INTERVAL 5 /* incr HB every x secs */
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#define XPC_HB_CHECK_DEFAULT_INTERVAL 20 /* check HB every x secs */
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/* define the process name of HB checker and the CPU it is pinned to */
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#define XPC_HB_CHECK_THREAD_NAME "xpc_hb"
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#define XPC_HB_CHECK_CPU 0
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/* define the process name of the discovery thread */
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#define XPC_DISCOVERY_THREAD_NAME "xpc_discovery"
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/*
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* the reserved page
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*
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* SAL reserves one page of memory per partition for XPC. Though a full page
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* in length (16384 bytes), its starting address is not page aligned, but it
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* is cacheline aligned. The reserved page consists of the following:
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*
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* reserved page header
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*
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* The first two 64-byte cachelines of the reserved page contain the
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* header (struct xpc_rsvd_page). Before SAL initialization has completed,
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* SAL has set up the following fields of the reserved page header:
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* SAL_signature, SAL_version, SAL_partid, and SAL_nasids_size. The
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* other fields are set up by XPC. (xpc_rsvd_page points to the local
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* partition's reserved page.)
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*
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* part_nasids mask
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* mach_nasids mask
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*
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* SAL also sets up two bitmaps (or masks), one that reflects the actual
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* nasids in this partition (part_nasids), and the other that reflects
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* the actual nasids in the entire machine (mach_nasids). We're only
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* interested in the even numbered nasids (which contain the processors
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* and/or memory), so we only need half as many bits to represent the
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* nasids. When mapping nasid to bit in a mask (or bit to nasid) be sure
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* to either divide or multiply by 2. The part_nasids mask is located
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* starting at the first cacheline following the reserved page header. The
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* mach_nasids mask follows right after the part_nasids mask. The size in
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* bytes of each mask is reflected by the reserved page header field
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* 'SAL_nasids_size'. (Local partition's mask pointers are xpc_part_nasids
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* and xpc_mach_nasids.)
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*
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* vars (ia64-sn2 only)
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* vars part (ia64-sn2 only)
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*
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* Immediately following the mach_nasids mask are the XPC variables
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* required by other partitions. First are those that are generic to all
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* partitions (vars), followed on the next available cacheline by those
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* which are partition specific (vars part). These are setup by XPC.
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* (Local partition's vars pointers are xpc_vars and xpc_vars_part.)
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*
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* Note: Until 'ts_jiffies' is set non-zero, the partition XPC code has not been
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* initialized.
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*/
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struct xpc_rsvd_page {
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u64 SAL_signature; /* SAL: unique signature */
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u64 SAL_version; /* SAL: version */
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short SAL_partid; /* SAL: partition ID */
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short max_npartitions; /* value of XPC_MAX_PARTITIONS */
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u8 version;
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u8 pad1[3]; /* align to next u64 in 1st 64-byte cacheline */
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unsigned long ts_jiffies; /* timestamp when rsvd pg was setup by XPC */
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union {
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struct {
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unsigned long vars_pa; /* phys addr */
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} sn2;
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struct {
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unsigned long heartbeat_gpa; /* phys addr */
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unsigned long activate_gru_mq_desc_gpa; /* phys addr */
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} uv;
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} sn;
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u64 pad2[9]; /* align to last u64 in 2nd 64-byte cacheline */
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u64 SAL_nasids_size; /* SAL: size of each nasid mask in bytes */
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};
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#define XPC_RP_VERSION _XPC_VERSION(3, 0) /* version 3.0 of the reserved page */
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/*
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* Define the structures by which XPC variables can be exported to other
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* partitions. (There are two: struct xpc_vars and struct xpc_vars_part)
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*/
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/*
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* The following structure describes the partition generic variables
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* needed by other partitions in order to properly initialize.
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*
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* struct xpc_vars version number also applies to struct xpc_vars_part.
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* Changes to either structure and/or related functionality should be
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* reflected by incrementing either the major or minor version numbers
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* of struct xpc_vars.
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*/
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struct xpc_vars_sn2 {
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u8 version;
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u64 heartbeat;
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DECLARE_BITMAP(heartbeating_to_mask, XP_MAX_NPARTITIONS_SN2);
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u64 heartbeat_offline; /* if 0, heartbeat should be changing */
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int activate_IRQ_nasid;
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int activate_IRQ_phys_cpuid;
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unsigned long vars_part_pa;
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unsigned long amos_page_pa;/* paddr of page of amos from MSPEC driver */
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struct amo *amos_page; /* vaddr of page of amos from MSPEC driver */
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};
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#define XPC_V_VERSION _XPC_VERSION(3, 1) /* version 3.1 of the cross vars */
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/*
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* The following structure describes the per partition specific variables.
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*
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* An array of these structures, one per partition, will be defined. As a
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* partition becomes active XPC will copy the array entry corresponding to
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* itself from that partition. It is desirable that the size of this structure
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* evenly divides into a 128-byte cacheline, such that none of the entries in
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* this array crosses a 128-byte cacheline boundary. As it is now, each entry
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* occupies 64-bytes.
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*/
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struct xpc_vars_part_sn2 {
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u64 magic;
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unsigned long openclose_args_pa; /* phys addr of open and close args */
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unsigned long GPs_pa; /* physical address of Get/Put values */
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unsigned long chctl_amo_pa; /* physical address of chctl flags' amo */
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int notify_IRQ_nasid; /* nasid of where to send notify IRQs */
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int notify_IRQ_phys_cpuid; /* CPUID of where to send notify IRQs */
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u8 nchannels; /* #of defined channels supported */
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u8 reserved[23]; /* pad to a full 64 bytes */
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};
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/*
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* The vars_part MAGIC numbers play a part in the first contact protocol.
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*
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* MAGIC1 indicates that the per partition specific variables for a remote
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* partition have been initialized by this partition.
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*
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* MAGIC2 indicates that this partition has pulled the remote partititions
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* per partition variables that pertain to this partition.
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*/
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#define XPC_VP_MAGIC1_SN2 0x0053524156435058L /* 'XPCVARS\0'L (little endian) */
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#define XPC_VP_MAGIC2_SN2 0x0073726176435058L /* 'XPCvars\0'L (little endian) */
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/* the reserved page sizes and offsets */
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#define XPC_RP_HEADER_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_rsvd_page))
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#define XPC_RP_VARS_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_vars_sn2))
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#define XPC_RP_PART_NASIDS(_rp) ((unsigned long *)((u8 *)(_rp) + \
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XPC_RP_HEADER_SIZE))
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#define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + \
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xpc_nasid_mask_nlongs)
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#define XPC_RP_VARS(_rp) ((struct xpc_vars_sn2 *) \
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(XPC_RP_MACH_NASIDS(_rp) + \
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xpc_nasid_mask_nlongs))
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/*
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* The following structure describes the partition's heartbeat info which
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* will be periodically read by other partitions to determine whether this
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* XPC is still 'alive'.
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*/
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struct xpc_heartbeat_uv {
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unsigned long value;
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unsigned long offline; /* if 0, heartbeat should be changing */
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};
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/*
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* Info pertinent to a GRU message queue using a watch list for irq generation.
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*/
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struct xpc_gru_mq_uv {
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void *address; /* address of GRU message queue */
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unsigned int order; /* size of GRU message queue as a power of 2 */
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int irq; /* irq raised when message is received in mq */
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int mmr_blade; /* blade where watchlist was allocated from */
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unsigned long mmr_offset; /* offset of irq mmr located on mmr_blade */
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unsigned long mmr_value; /* value of irq mmr located on mmr_blade */
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int watchlist_num; /* number of watchlist allocatd by BIOS */
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void *gru_mq_desc; /* opaque structure used by the GRU driver */
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};
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/*
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* The activate_mq is used to send/receive GRU messages that affect XPC's
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* partition active state and channel state. This is uv only.
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*/
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struct xpc_activate_mq_msghdr_uv {
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unsigned int gru_msg_hdr; /* FOR GRU INTERNAL USE ONLY */
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short partid; /* sender's partid */
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u8 act_state; /* sender's act_state at time msg sent */
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u8 type; /* message's type */
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unsigned long rp_ts_jiffies; /* timestamp of sender's rp setup by XPC */
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};
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/* activate_mq defined message types */
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#define XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV 0
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#define XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV 1
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#define XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV 2
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#define XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV 3
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#define XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV 4
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#define XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV 5
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#define XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV 6
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#define XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV 7
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#define XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV 8
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#define XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV 9
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struct xpc_activate_mq_msg_uv {
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struct xpc_activate_mq_msghdr_uv hdr;
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};
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struct xpc_activate_mq_msg_activate_req_uv {
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struct xpc_activate_mq_msghdr_uv hdr;
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unsigned long rp_gpa;
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unsigned long heartbeat_gpa;
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unsigned long activate_gru_mq_desc_gpa;
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};
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struct xpc_activate_mq_msg_deactivate_req_uv {
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struct xpc_activate_mq_msghdr_uv hdr;
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enum xp_retval reason;
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};
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struct xpc_activate_mq_msg_chctl_closerequest_uv {
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struct xpc_activate_mq_msghdr_uv hdr;
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short ch_number;
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enum xp_retval reason;
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};
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struct xpc_activate_mq_msg_chctl_closereply_uv {
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struct xpc_activate_mq_msghdr_uv hdr;
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short ch_number;
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};
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struct xpc_activate_mq_msg_chctl_openrequest_uv {
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struct xpc_activate_mq_msghdr_uv hdr;
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short ch_number;
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short entry_size; /* size of notify_mq's GRU messages */
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short local_nentries; /* ??? Is this needed? What is? */
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};
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struct xpc_activate_mq_msg_chctl_openreply_uv {
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struct xpc_activate_mq_msghdr_uv hdr;
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short ch_number;
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short remote_nentries; /* ??? Is this needed? What is? */
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short local_nentries; /* ??? Is this needed? What is? */
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unsigned long notify_gru_mq_desc_gpa;
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};
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struct xpc_activate_mq_msg_chctl_opencomplete_uv {
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struct xpc_activate_mq_msghdr_uv hdr;
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short ch_number;
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};
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/*
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* Functions registered by add_timer() or called by kernel_thread() only
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* allow for a single 64-bit argument. The following macros can be used to
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* pack and unpack two (32-bit, 16-bit or 8-bit) arguments into or out from
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* the passed argument.
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*/
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#define XPC_PACK_ARGS(_arg1, _arg2) \
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((((u64)_arg1) & 0xffffffff) | \
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((((u64)_arg2) & 0xffffffff) << 32))
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#define XPC_UNPACK_ARG1(_args) (((u64)_args) & 0xffffffff)
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#define XPC_UNPACK_ARG2(_args) ((((u64)_args) >> 32) & 0xffffffff)
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/*
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* Define a Get/Put value pair (pointers) used with a message queue.
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*/
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struct xpc_gp_sn2 {
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s64 get; /* Get value */
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s64 put; /* Put value */
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};
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#define XPC_GP_SIZE \
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L1_CACHE_ALIGN(sizeof(struct xpc_gp_sn2) * XPC_MAX_NCHANNELS)
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/*
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* Define a structure that contains arguments associated with opening and
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* closing a channel.
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*/
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struct xpc_openclose_args {
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u16 reason; /* reason why channel is closing */
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u16 entry_size; /* sizeof each message entry */
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u16 remote_nentries; /* #of message entries in remote msg queue */
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u16 local_nentries; /* #of message entries in local msg queue */
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unsigned long local_msgqueue_pa; /* phys addr of local message queue */
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};
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#define XPC_OPENCLOSE_ARGS_SIZE \
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L1_CACHE_ALIGN(sizeof(struct xpc_openclose_args) * \
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XPC_MAX_NCHANNELS)
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/*
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* Structures to define a fifo singly-linked list.
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*/
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struct xpc_fifo_entry_uv {
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struct xpc_fifo_entry_uv *next;
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};
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struct xpc_fifo_head_uv {
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struct xpc_fifo_entry_uv *first;
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struct xpc_fifo_entry_uv *last;
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spinlock_t lock;
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int n_entries;
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};
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/*
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* Define a sn2 styled message.
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*
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* A user-defined message resides in the payload area. The max size of the
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* payload is defined by the user via xpc_connect().
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*
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* The size of a message entry (within a message queue) must be a 128-byte
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* cacheline sized multiple in order to facilitate the BTE transfer of messages
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* from one message queue to another.
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*/
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struct xpc_msg_sn2 {
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u8 flags; /* FOR XPC INTERNAL USE ONLY */
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u8 reserved[7]; /* FOR XPC INTERNAL USE ONLY */
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s64 number; /* FOR XPC INTERNAL USE ONLY */
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u64 payload; /* user defined portion of message */
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};
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/* struct xpc_msg_sn2 flags */
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#define XPC_M_SN2_DONE 0x01 /* msg has been received/consumed */
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#define XPC_M_SN2_READY 0x02 /* msg is ready to be sent */
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#define XPC_M_SN2_INTERRUPT 0x04 /* send interrupt when msg consumed */
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/*
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* The format of a uv XPC notify_mq GRU message is as follows:
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*
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* A user-defined message resides in the payload area. The max size of the
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* payload is defined by the user via xpc_connect().
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*
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* The size of a message (payload and header) sent via the GRU must be either 1
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* or 2 GRU_CACHE_LINE_BYTES in length.
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*/
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struct xpc_notify_mq_msghdr_uv {
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union {
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unsigned int gru_msg_hdr; /* FOR GRU INTERNAL USE ONLY */
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struct xpc_fifo_entry_uv next; /* FOR XPC INTERNAL USE ONLY */
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} u;
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short partid; /* FOR XPC INTERNAL USE ONLY */
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u8 ch_number; /* FOR XPC INTERNAL USE ONLY */
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u8 size; /* FOR XPC INTERNAL USE ONLY */
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unsigned int msg_slot_number; /* FOR XPC INTERNAL USE ONLY */
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};
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struct xpc_notify_mq_msg_uv {
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struct xpc_notify_mq_msghdr_uv hdr;
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unsigned long payload;
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};
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/*
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* Define sn2's notify entry.
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*
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* This is used to notify a message's sender that their message was received
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* and consumed by the intended recipient.
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*/
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struct xpc_notify_sn2 {
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u8 type; /* type of notification */
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/* the following two fields are only used if type == XPC_N_CALL */
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xpc_notify_func func; /* user's notify function */
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void *key; /* pointer to user's key */
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};
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/* struct xpc_notify_sn2 type of notification */
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#define XPC_N_CALL 0x01 /* notify function provided by user */
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/*
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* Define uv's version of the notify entry. It additionally is used to allocate
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* a msg slot on the remote partition into which is copied a sent message.
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*/
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struct xpc_send_msg_slot_uv {
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struct xpc_fifo_entry_uv next;
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unsigned int msg_slot_number;
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xpc_notify_func func; /* user's notify function */
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void *key; /* pointer to user's key */
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};
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/*
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* Define the structure that manages all the stuff required by a channel. In
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* particular, they are used to manage the messages sent across the channel.
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*
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* This structure is private to a partition, and is NOT shared across the
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* partition boundary.
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*
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* There is an array of these structures for each remote partition. It is
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* allocated at the time a partition becomes active. The array contains one
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* of these structures for each potential channel connection to that partition.
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*/
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/*
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* The following is sn2 only.
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*
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* Each channel structure manages two message queues (circular buffers).
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* They are allocated at the time a channel connection is made. One of
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* these message queues (local_msgqueue) holds the locally created messages
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* that are destined for the remote partition. The other of these message
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* queues (remote_msgqueue) is a locally cached copy of the remote partition's
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* own local_msgqueue.
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*
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* The following is a description of the Get/Put pointers used to manage these
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* two message queues. Consider the local_msgqueue to be on one partition
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* and the remote_msgqueue to be its cached copy on another partition. A
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* description of what each of the lettered areas contains is included.
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*
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*
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* local_msgqueue remote_msgqueue
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*
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* |/////////| |/////////|
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* w_remote_GP.get --> +---------+ |/////////|
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* | F | |/////////|
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* remote_GP.get --> +---------+ +---------+ <-- local_GP->get
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* | | | |
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* | | | E |
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* | | | |
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* | | +---------+ <-- w_local_GP.get
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* | B | |/////////|
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* | | |////D////|
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* | | |/////////|
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* | | +---------+ <-- w_remote_GP.put
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* | | |////C////|
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* local_GP->put --> +---------+ +---------+ <-- remote_GP.put
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* | | |/////////|
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* | A | |/////////|
|
|
* | | |/////////|
|
|
* w_local_GP.put --> +---------+ |/////////|
|
|
* |/////////| |/////////|
|
|
*
|
|
*
|
|
* ( remote_GP.[get|put] are cached copies of the remote
|
|
* partition's local_GP->[get|put], and thus their values can
|
|
* lag behind their counterparts on the remote partition. )
|
|
*
|
|
*
|
|
* A - Messages that have been allocated, but have not yet been sent to the
|
|
* remote partition.
|
|
*
|
|
* B - Messages that have been sent, but have not yet been acknowledged by the
|
|
* remote partition as having been received.
|
|
*
|
|
* C - Area that needs to be prepared for the copying of sent messages, by
|
|
* the clearing of the message flags of any previously received messages.
|
|
*
|
|
* D - Area into which sent messages are to be copied from the remote
|
|
* partition's local_msgqueue and then delivered to their intended
|
|
* recipients. [ To allow for a multi-message copy, another pointer
|
|
* (next_msg_to_pull) has been added to keep track of the next message
|
|
* number needing to be copied (pulled). It chases after w_remote_GP.put.
|
|
* Any messages lying between w_local_GP.get and next_msg_to_pull have
|
|
* been copied and are ready to be delivered. ]
|
|
*
|
|
* E - Messages that have been copied and delivered, but have not yet been
|
|
* acknowledged by the recipient as having been received.
|
|
*
|
|
* F - Messages that have been acknowledged, but XPC has not yet notified the
|
|
* sender that the message was received by its intended recipient.
|
|
* This is also an area that needs to be prepared for the allocating of
|
|
* new messages, by the clearing of the message flags of the acknowledged
|
|
* messages.
|
|
*/
|
|
|
|
struct xpc_channel_sn2 {
|
|
struct xpc_openclose_args *local_openclose_args; /* args passed on */
|
|
/* opening or closing of channel */
|
|
|
|
void *local_msgqueue_base; /* base address of kmalloc'd space */
|
|
struct xpc_msg_sn2 *local_msgqueue; /* local message queue */
|
|
void *remote_msgqueue_base; /* base address of kmalloc'd space */
|
|
struct xpc_msg_sn2 *remote_msgqueue; /* cached copy of remote */
|
|
/* partition's local message queue */
|
|
unsigned long remote_msgqueue_pa; /* phys addr of remote partition's */
|
|
/* local message queue */
|
|
|
|
struct xpc_notify_sn2 *notify_queue;/* notify queue for messages sent */
|
|
|
|
/* various flavors of local and remote Get/Put values */
|
|
|
|
struct xpc_gp_sn2 *local_GP; /* local Get/Put values */
|
|
struct xpc_gp_sn2 remote_GP; /* remote Get/Put values */
|
|
struct xpc_gp_sn2 w_local_GP; /* working local Get/Put values */
|
|
struct xpc_gp_sn2 w_remote_GP; /* working remote Get/Put values */
|
|
s64 next_msg_to_pull; /* Put value of next msg to pull */
|
|
|
|
struct mutex msg_to_pull_mutex; /* next msg to pull serialization */
|
|
};
|
|
|
|
struct xpc_channel_uv {
|
|
void *cached_notify_gru_mq_desc; /* remote partition's notify mq's */
|
|
/* gru mq descriptor */
|
|
|
|
struct xpc_send_msg_slot_uv *send_msg_slots;
|
|
void *recv_msg_slots; /* each slot will hold a xpc_notify_mq_msg_uv */
|
|
/* structure plus the user's payload */
|
|
|
|
struct xpc_fifo_head_uv msg_slot_free_list;
|
|
struct xpc_fifo_head_uv recv_msg_list; /* deliverable payloads */
|
|
};
|
|
|
|
struct xpc_channel {
|
|
short partid; /* ID of remote partition connected */
|
|
spinlock_t lock; /* lock for updating this structure */
|
|
unsigned int flags; /* general flags */
|
|
|
|
enum xp_retval reason; /* reason why channel is disconnect'g */
|
|
int reason_line; /* line# disconnect initiated from */
|
|
|
|
u16 number; /* channel # */
|
|
|
|
u16 entry_size; /* sizeof each msg entry */
|
|
u16 local_nentries; /* #of msg entries in local msg queue */
|
|
u16 remote_nentries; /* #of msg entries in remote msg queue */
|
|
|
|
atomic_t references; /* #of external references to queues */
|
|
|
|
atomic_t n_on_msg_allocate_wq; /* #on msg allocation wait queue */
|
|
wait_queue_head_t msg_allocate_wq; /* msg allocation wait queue */
|
|
|
|
u8 delayed_chctl_flags; /* chctl flags received, but delayed */
|
|
/* action until channel disconnected */
|
|
|
|
atomic_t n_to_notify; /* #of msg senders to notify */
|
|
|
|
xpc_channel_func func; /* user's channel function */
|
|
void *key; /* pointer to user's key */
|
|
|
|
struct completion wdisconnect_wait; /* wait for channel disconnect */
|
|
|
|
/* kthread management related fields */
|
|
|
|
atomic_t kthreads_assigned; /* #of kthreads assigned to channel */
|
|
u32 kthreads_assigned_limit; /* limit on #of kthreads assigned */
|
|
atomic_t kthreads_idle; /* #of kthreads idle waiting for work */
|
|
u32 kthreads_idle_limit; /* limit on #of kthreads idle */
|
|
atomic_t kthreads_active; /* #of kthreads actively working */
|
|
|
|
wait_queue_head_t idle_wq; /* idle kthread wait queue */
|
|
|
|
union {
|
|
struct xpc_channel_sn2 sn2;
|
|
struct xpc_channel_uv uv;
|
|
} sn;
|
|
|
|
} ____cacheline_aligned;
|
|
|
|
/* struct xpc_channel flags */
|
|
|
|
#define XPC_C_WASCONNECTED 0x00000001 /* channel was connected */
|
|
|
|
#define XPC_C_ROPENCOMPLETE 0x00000002 /* remote open channel complete */
|
|
#define XPC_C_OPENCOMPLETE 0x00000004 /* local open channel complete */
|
|
#define XPC_C_ROPENREPLY 0x00000008 /* remote open channel reply */
|
|
#define XPC_C_OPENREPLY 0x00000010 /* local open channel reply */
|
|
#define XPC_C_ROPENREQUEST 0x00000020 /* remote open channel request */
|
|
#define XPC_C_OPENREQUEST 0x00000040 /* local open channel request */
|
|
|
|
#define XPC_C_SETUP 0x00000080 /* channel's msgqueues are alloc'd */
|
|
#define XPC_C_CONNECTEDCALLOUT 0x00000100 /* connected callout initiated */
|
|
#define XPC_C_CONNECTEDCALLOUT_MADE \
|
|
0x00000200 /* connected callout completed */
|
|
#define XPC_C_CONNECTED 0x00000400 /* local channel is connected */
|
|
#define XPC_C_CONNECTING 0x00000800 /* channel is being connected */
|
|
|
|
#define XPC_C_RCLOSEREPLY 0x00001000 /* remote close channel reply */
|
|
#define XPC_C_CLOSEREPLY 0x00002000 /* local close channel reply */
|
|
#define XPC_C_RCLOSEREQUEST 0x00004000 /* remote close channel request */
|
|
#define XPC_C_CLOSEREQUEST 0x00008000 /* local close channel request */
|
|
|
|
#define XPC_C_DISCONNECTED 0x00010000 /* channel is disconnected */
|
|
#define XPC_C_DISCONNECTING 0x00020000 /* channel is being disconnected */
|
|
#define XPC_C_DISCONNECTINGCALLOUT \
|
|
0x00040000 /* disconnecting callout initiated */
|
|
#define XPC_C_DISCONNECTINGCALLOUT_MADE \
|
|
0x00080000 /* disconnecting callout completed */
|
|
#define XPC_C_WDISCONNECT 0x00100000 /* waiting for channel disconnect */
|
|
|
|
/*
|
|
* The channel control flags (chctl) union consists of a 64-bit variable which
|
|
* is divided up into eight bytes, ordered from right to left. Byte zero
|
|
* pertains to channel 0, byte one to channel 1, and so on. Each channel's byte
|
|
* can have one or more of the chctl flags set in it.
|
|
*/
|
|
|
|
union xpc_channel_ctl_flags {
|
|
u64 all_flags;
|
|
u8 flags[XPC_MAX_NCHANNELS];
|
|
};
|
|
|
|
/* chctl flags */
|
|
#define XPC_CHCTL_CLOSEREQUEST 0x01
|
|
#define XPC_CHCTL_CLOSEREPLY 0x02
|
|
#define XPC_CHCTL_OPENREQUEST 0x04
|
|
#define XPC_CHCTL_OPENREPLY 0x08
|
|
#define XPC_CHCTL_OPENCOMPLETE 0x10
|
|
#define XPC_CHCTL_MSGREQUEST 0x20
|
|
|
|
#define XPC_OPENCLOSE_CHCTL_FLAGS \
|
|
(XPC_CHCTL_CLOSEREQUEST | XPC_CHCTL_CLOSEREPLY | \
|
|
XPC_CHCTL_OPENREQUEST | XPC_CHCTL_OPENREPLY | \
|
|
XPC_CHCTL_OPENCOMPLETE)
|
|
#define XPC_MSG_CHCTL_FLAGS XPC_CHCTL_MSGREQUEST
|
|
|
|
static inline int
|
|
xpc_any_openclose_chctl_flags_set(union xpc_channel_ctl_flags *chctl)
|
|
{
|
|
int ch_number;
|
|
|
|
for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++) {
|
|
if (chctl->flags[ch_number] & XPC_OPENCLOSE_CHCTL_FLAGS)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
xpc_any_msg_chctl_flags_set(union xpc_channel_ctl_flags *chctl)
|
|
{
|
|
int ch_number;
|
|
|
|
for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++) {
|
|
if (chctl->flags[ch_number] & XPC_MSG_CHCTL_FLAGS)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Manage channels on a partition basis. There is one of these structures
|
|
* for each partition (a partition will never utilize the structure that
|
|
* represents itself).
|
|
*/
|
|
|
|
struct xpc_partition_sn2 {
|
|
unsigned long remote_amos_page_pa; /* paddr of partition's amos page */
|
|
int activate_IRQ_nasid; /* active partition's act/deact nasid */
|
|
int activate_IRQ_phys_cpuid; /* active part's act/deact phys cpuid */
|
|
|
|
unsigned long remote_vars_pa; /* phys addr of partition's vars */
|
|
unsigned long remote_vars_part_pa; /* paddr of partition's vars part */
|
|
u8 remote_vars_version; /* version# of partition's vars */
|
|
|
|
void *local_GPs_base; /* base address of kmalloc'd space */
|
|
struct xpc_gp_sn2 *local_GPs; /* local Get/Put values */
|
|
void *remote_GPs_base; /* base address of kmalloc'd space */
|
|
struct xpc_gp_sn2 *remote_GPs; /* copy of remote partition's local */
|
|
/* Get/Put values */
|
|
unsigned long remote_GPs_pa; /* phys addr of remote partition's local */
|
|
/* Get/Put values */
|
|
|
|
void *local_openclose_args_base; /* base address of kmalloc'd space */
|
|
struct xpc_openclose_args *local_openclose_args; /* local's args */
|
|
unsigned long remote_openclose_args_pa; /* phys addr of remote's args */
|
|
|
|
int notify_IRQ_nasid; /* nasid of where to send notify IRQs */
|
|
int notify_IRQ_phys_cpuid; /* CPUID of where to send notify IRQs */
|
|
char notify_IRQ_owner[8]; /* notify IRQ's owner's name */
|
|
|
|
struct amo *remote_chctl_amo_va; /* addr of remote chctl flags' amo */
|
|
struct amo *local_chctl_amo_va; /* address of chctl flags' amo */
|
|
|
|
struct timer_list dropped_notify_IRQ_timer; /* dropped IRQ timer */
|
|
};
|
|
|
|
struct xpc_partition_uv {
|
|
unsigned long heartbeat_gpa; /* phys addr of partition's heartbeat */
|
|
struct xpc_heartbeat_uv cached_heartbeat; /* cached copy of */
|
|
/* partition's heartbeat */
|
|
unsigned long activate_gru_mq_desc_gpa; /* phys addr of parititon's */
|
|
/* activate mq's gru mq */
|
|
/* descriptor */
|
|
void *cached_activate_gru_mq_desc; /* cached copy of partition's */
|
|
/* activate mq's gru mq descriptor */
|
|
struct mutex cached_activate_gru_mq_desc_mutex;
|
|
spinlock_t flags_lock; /* protect updating of flags */
|
|
unsigned int flags; /* general flags */
|
|
u8 remote_act_state; /* remote partition's act_state */
|
|
u8 act_state_req; /* act_state request from remote partition */
|
|
enum xp_retval reason; /* reason for deactivate act_state request */
|
|
};
|
|
|
|
/* struct xpc_partition_uv flags */
|
|
|
|
#define XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV 0x00000001
|
|
#define XPC_P_ENGAGED_UV 0x00000002
|
|
|
|
/* struct xpc_partition_uv act_state change requests */
|
|
|
|
#define XPC_P_ASR_ACTIVATE_UV 0x01
|
|
#define XPC_P_ASR_REACTIVATE_UV 0x02
|
|
#define XPC_P_ASR_DEACTIVATE_UV 0x03
|
|
|
|
struct xpc_partition {
|
|
|
|
/* XPC HB infrastructure */
|
|
|
|
u8 remote_rp_version; /* version# of partition's rsvd pg */
|
|
unsigned long remote_rp_ts_jiffies; /* timestamp when rsvd pg setup */
|
|
unsigned long remote_rp_pa; /* phys addr of partition's rsvd pg */
|
|
u64 last_heartbeat; /* HB at last read */
|
|
u32 activate_IRQ_rcvd; /* IRQs since activation */
|
|
spinlock_t act_lock; /* protect updating of act_state */
|
|
u8 act_state; /* from XPC HB viewpoint */
|
|
enum xp_retval reason; /* reason partition is deactivating */
|
|
int reason_line; /* line# deactivation initiated from */
|
|
|
|
unsigned long disengage_timeout; /* timeout in jiffies */
|
|
struct timer_list disengage_timer;
|
|
|
|
/* XPC infrastructure referencing and teardown control */
|
|
|
|
u8 setup_state; /* infrastructure setup state */
|
|
wait_queue_head_t teardown_wq; /* kthread waiting to teardown infra */
|
|
atomic_t references; /* #of references to infrastructure */
|
|
|
|
u8 nchannels; /* #of defined channels supported */
|
|
atomic_t nchannels_active; /* #of channels that are not DISCONNECTED */
|
|
atomic_t nchannels_engaged; /* #of channels engaged with remote part */
|
|
struct xpc_channel *channels; /* array of channel structures */
|
|
|
|
/* fields used for managing channel avialability and activity */
|
|
|
|
union xpc_channel_ctl_flags chctl; /* chctl flags yet to be processed */
|
|
spinlock_t chctl_lock; /* chctl flags lock */
|
|
|
|
void *remote_openclose_args_base; /* base address of kmalloc'd space */
|
|
struct xpc_openclose_args *remote_openclose_args; /* copy of remote's */
|
|
/* args */
|
|
|
|
/* channel manager related fields */
|
|
|
|
atomic_t channel_mgr_requests; /* #of requests to activate chan mgr */
|
|
wait_queue_head_t channel_mgr_wq; /* channel mgr's wait queue */
|
|
|
|
union {
|
|
struct xpc_partition_sn2 sn2;
|
|
struct xpc_partition_uv uv;
|
|
} sn;
|
|
|
|
} ____cacheline_aligned;
|
|
|
|
struct xpc_arch_operations {
|
|
int (*setup_partitions) (void);
|
|
void (*teardown_partitions) (void);
|
|
void (*process_activate_IRQ_rcvd) (void);
|
|
enum xp_retval (*get_partition_rsvd_page_pa)
|
|
(void *, u64 *, unsigned long *, size_t *);
|
|
int (*setup_rsvd_page) (struct xpc_rsvd_page *);
|
|
|
|
void (*allow_hb) (short);
|
|
void (*disallow_hb) (short);
|
|
void (*disallow_all_hbs) (void);
|
|
void (*increment_heartbeat) (void);
|
|
void (*offline_heartbeat) (void);
|
|
void (*online_heartbeat) (void);
|
|
void (*heartbeat_init) (void);
|
|
void (*heartbeat_exit) (void);
|
|
enum xp_retval (*get_remote_heartbeat) (struct xpc_partition *);
|
|
|
|
void (*request_partition_activation) (struct xpc_rsvd_page *,
|
|
unsigned long, int);
|
|
void (*request_partition_reactivation) (struct xpc_partition *);
|
|
void (*request_partition_deactivation) (struct xpc_partition *);
|
|
void (*cancel_partition_deactivation_request) (struct xpc_partition *);
|
|
enum xp_retval (*setup_ch_structures) (struct xpc_partition *);
|
|
void (*teardown_ch_structures) (struct xpc_partition *);
|
|
|
|
enum xp_retval (*make_first_contact) (struct xpc_partition *);
|
|
|
|
u64 (*get_chctl_all_flags) (struct xpc_partition *);
|
|
void (*send_chctl_closerequest) (struct xpc_channel *, unsigned long *);
|
|
void (*send_chctl_closereply) (struct xpc_channel *, unsigned long *);
|
|
void (*send_chctl_openrequest) (struct xpc_channel *, unsigned long *);
|
|
void (*send_chctl_openreply) (struct xpc_channel *, unsigned long *);
|
|
void (*send_chctl_opencomplete) (struct xpc_channel *, unsigned long *);
|
|
void (*process_msg_chctl_flags) (struct xpc_partition *, int);
|
|
|
|
enum xp_retval (*save_remote_msgqueue_pa) (struct xpc_channel *,
|
|
unsigned long);
|
|
|
|
enum xp_retval (*setup_msg_structures) (struct xpc_channel *);
|
|
void (*teardown_msg_structures) (struct xpc_channel *);
|
|
|
|
void (*indicate_partition_engaged) (struct xpc_partition *);
|
|
void (*indicate_partition_disengaged) (struct xpc_partition *);
|
|
void (*assume_partition_disengaged) (short);
|
|
int (*partition_engaged) (short);
|
|
int (*any_partition_engaged) (void);
|
|
|
|
int (*n_of_deliverable_payloads) (struct xpc_channel *);
|
|
enum xp_retval (*send_payload) (struct xpc_channel *, u32, void *,
|
|
u16, u8, xpc_notify_func, void *);
|
|
void *(*get_deliverable_payload) (struct xpc_channel *);
|
|
void (*received_payload) (struct xpc_channel *, void *);
|
|
void (*notify_senders_of_disconnect) (struct xpc_channel *);
|
|
};
|
|
|
|
/* struct xpc_partition act_state values (for XPC HB) */
|
|
|
|
#define XPC_P_AS_INACTIVE 0x00 /* partition is not active */
|
|
#define XPC_P_AS_ACTIVATION_REQ 0x01 /* created thread to activate */
|
|
#define XPC_P_AS_ACTIVATING 0x02 /* activation thread started */
|
|
#define XPC_P_AS_ACTIVE 0x03 /* xpc_partition_up() was called */
|
|
#define XPC_P_AS_DEACTIVATING 0x04 /* partition deactivation initiated */
|
|
|
|
#define XPC_DEACTIVATE_PARTITION(_p, _reason) \
|
|
xpc_deactivate_partition(__LINE__, (_p), (_reason))
|
|
|
|
/* struct xpc_partition setup_state values */
|
|
|
|
#define XPC_P_SS_UNSET 0x00 /* infrastructure was never setup */
|
|
#define XPC_P_SS_SETUP 0x01 /* infrastructure is setup */
|
|
#define XPC_P_SS_WTEARDOWN 0x02 /* waiting to teardown infrastructure */
|
|
#define XPC_P_SS_TORNDOWN 0x03 /* infrastructure is torndown */
|
|
|
|
/*
|
|
* struct xpc_partition_sn2's dropped notify IRQ timer is set to wait the
|
|
* following interval #of seconds before checking for dropped notify IRQs.
|
|
* These can occur whenever an IRQ's associated amo write doesn't complete
|
|
* until after the IRQ was received.
|
|
*/
|
|
#define XPC_DROPPED_NOTIFY_IRQ_WAIT_INTERVAL (0.25 * HZ)
|
|
|
|
/* number of seconds to wait for other partitions to disengage */
|
|
#define XPC_DISENGAGE_DEFAULT_TIMELIMIT 90
|
|
|
|
/* interval in seconds to print 'waiting deactivation' messages */
|
|
#define XPC_DEACTIVATE_PRINTMSG_INTERVAL 10
|
|
|
|
#define XPC_PARTID(_p) ((short)((_p) - &xpc_partitions[0]))
|
|
|
|
/* found in xp_main.c */
|
|
extern struct xpc_registration xpc_registrations[];
|
|
|
|
/* found in xpc_main.c */
|
|
extern struct device *xpc_part;
|
|
extern struct device *xpc_chan;
|
|
extern struct xpc_arch_operations xpc_arch_ops;
|
|
extern int xpc_disengage_timelimit;
|
|
extern int xpc_disengage_timedout;
|
|
extern int xpc_activate_IRQ_rcvd;
|
|
extern spinlock_t xpc_activate_IRQ_rcvd_lock;
|
|
extern wait_queue_head_t xpc_activate_IRQ_wq;
|
|
extern void *xpc_kzalloc_cacheline_aligned(size_t, gfp_t, void **);
|
|
extern void xpc_activate_partition(struct xpc_partition *);
|
|
extern void xpc_activate_kthreads(struct xpc_channel *, int);
|
|
extern void xpc_create_kthreads(struct xpc_channel *, int, int);
|
|
extern void xpc_disconnect_wait(int);
|
|
|
|
/* found in xpc_sn2.c */
|
|
extern int xpc_init_sn2(void);
|
|
extern void xpc_exit_sn2(void);
|
|
|
|
/* found in xpc_uv.c */
|
|
extern int xpc_init_uv(void);
|
|
extern void xpc_exit_uv(void);
|
|
|
|
/* found in xpc_partition.c */
|
|
extern int xpc_exiting;
|
|
extern int xpc_nasid_mask_nlongs;
|
|
extern struct xpc_rsvd_page *xpc_rsvd_page;
|
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extern unsigned long *xpc_mach_nasids;
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extern struct xpc_partition *xpc_partitions;
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extern void *xpc_kmalloc_cacheline_aligned(size_t, gfp_t, void **);
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extern int xpc_setup_rsvd_page(void);
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extern void xpc_teardown_rsvd_page(void);
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extern int xpc_identify_activate_IRQ_sender(void);
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extern int xpc_partition_disengaged(struct xpc_partition *);
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extern enum xp_retval xpc_mark_partition_active(struct xpc_partition *);
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extern void xpc_mark_partition_inactive(struct xpc_partition *);
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extern void xpc_discovery(void);
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extern enum xp_retval xpc_get_remote_rp(int, unsigned long *,
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struct xpc_rsvd_page *,
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unsigned long *);
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extern void xpc_deactivate_partition(const int, struct xpc_partition *,
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enum xp_retval);
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extern enum xp_retval xpc_initiate_partid_to_nasids(short, void *);
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/* found in xpc_channel.c */
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extern void xpc_initiate_connect(int);
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extern void xpc_initiate_disconnect(int);
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extern enum xp_retval xpc_allocate_msg_wait(struct xpc_channel *);
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extern enum xp_retval xpc_initiate_send(short, int, u32, void *, u16);
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extern enum xp_retval xpc_initiate_send_notify(short, int, u32, void *, u16,
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xpc_notify_func, void *);
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extern void xpc_initiate_received(short, int, void *);
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extern void xpc_process_sent_chctl_flags(struct xpc_partition *);
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extern void xpc_connected_callout(struct xpc_channel *);
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extern void xpc_deliver_payload(struct xpc_channel *);
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extern void xpc_disconnect_channel(const int, struct xpc_channel *,
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enum xp_retval, unsigned long *);
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extern void xpc_disconnect_callout(struct xpc_channel *, enum xp_retval);
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extern void xpc_partition_going_down(struct xpc_partition *, enum xp_retval);
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static inline void
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xpc_wakeup_channel_mgr(struct xpc_partition *part)
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{
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if (atomic_inc_return(&part->channel_mgr_requests) == 1)
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wake_up(&part->channel_mgr_wq);
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}
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/*
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* These next two inlines are used to keep us from tearing down a channel's
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* msg queues while a thread may be referencing them.
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*/
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static inline void
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xpc_msgqueue_ref(struct xpc_channel *ch)
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{
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atomic_inc(&ch->references);
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}
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static inline void
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xpc_msgqueue_deref(struct xpc_channel *ch)
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{
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s32 refs = atomic_dec_return(&ch->references);
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DBUG_ON(refs < 0);
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if (refs == 0)
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xpc_wakeup_channel_mgr(&xpc_partitions[ch->partid]);
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}
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#define XPC_DISCONNECT_CHANNEL(_ch, _reason, _irqflgs) \
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xpc_disconnect_channel(__LINE__, _ch, _reason, _irqflgs)
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/*
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* These two inlines are used to keep us from tearing down a partition's
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* setup infrastructure while a thread may be referencing it.
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*/
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static inline void
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xpc_part_deref(struct xpc_partition *part)
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{
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s32 refs = atomic_dec_return(&part->references);
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DBUG_ON(refs < 0);
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if (refs == 0 && part->setup_state == XPC_P_SS_WTEARDOWN)
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wake_up(&part->teardown_wq);
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}
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static inline int
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xpc_part_ref(struct xpc_partition *part)
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{
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int setup;
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atomic_inc(&part->references);
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setup = (part->setup_state == XPC_P_SS_SETUP);
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if (!setup)
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xpc_part_deref(part);
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return setup;
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}
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/*
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* The following macro is to be used for the setting of the reason and
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* reason_line fields in both the struct xpc_channel and struct xpc_partition
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* structures.
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*/
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#define XPC_SET_REASON(_p, _reason, _line) \
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{ \
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(_p)->reason = _reason; \
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(_p)->reason_line = _line; \
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}
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#endif /* _DRIVERS_MISC_SGIXP_XPC_H */
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