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732 lines
26 KiB
732 lines
26 KiB
/* |
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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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/* |
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* Cross Partition Communication (XPC) structures and macros. |
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*/ |
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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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/* |
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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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|
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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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* 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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* |
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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 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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/* 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_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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/* |
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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 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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* 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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/* 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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struct xpc_channel_uv { |
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void *cached_notify_gru_mq_desc; /* remote partition's notify mq's */ |
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/* gru mq descriptor */ |
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struct xpc_send_msg_slot_uv *send_msg_slots; |
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void *recv_msg_slots; /* each slot will hold a xpc_notify_mq_msg_uv */ |
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/* structure plus the user's payload */ |
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struct xpc_fifo_head_uv msg_slot_free_list; |
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struct xpc_fifo_head_uv recv_msg_list; /* deliverable payloads */ |
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}; |
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struct xpc_channel { |
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short partid; /* ID of remote partition connected */ |
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spinlock_t lock; /* lock for updating this structure */ |
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unsigned int flags; /* general flags */ |
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enum xp_retval reason; /* reason why channel is disconnect'g */ |
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int reason_line; /* line# disconnect initiated from */ |
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u16 number; /* channel # */ |
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u16 entry_size; /* sizeof each msg entry */ |
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u16 local_nentries; /* #of msg entries in local msg queue */ |
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u16 remote_nentries; /* #of msg entries in remote msg queue */ |
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atomic_t references; /* #of external references to queues */ |
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atomic_t n_on_msg_allocate_wq; /* #on msg allocation wait queue */ |
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wait_queue_head_t msg_allocate_wq; /* msg allocation wait queue */ |
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u8 delayed_chctl_flags; /* chctl flags received, but delayed */ |
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/* action until channel disconnected */ |
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atomic_t n_to_notify; /* #of msg senders to notify */ |
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xpc_channel_func func; /* user's channel function */ |
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void *key; /* pointer to user's key */ |
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struct completion wdisconnect_wait; /* wait for channel disconnect */ |
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/* kthread management related fields */ |
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atomic_t kthreads_assigned; /* #of kthreads assigned to channel */ |
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u32 kthreads_assigned_limit; /* limit on #of kthreads assigned */ |
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atomic_t kthreads_idle; /* #of kthreads idle waiting for work */ |
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u32 kthreads_idle_limit; /* limit on #of kthreads idle */ |
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atomic_t kthreads_active; /* #of kthreads actively working */ |
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wait_queue_head_t idle_wq; /* idle kthread wait queue */ |
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union { |
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struct xpc_channel_uv uv; |
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} sn; |
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} ____cacheline_aligned; |
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/* struct xpc_channel flags */ |
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#define XPC_C_WASCONNECTED 0x00000001 /* channel was connected */ |
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#define XPC_C_ROPENCOMPLETE 0x00000002 /* remote open channel complete */ |
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#define XPC_C_OPENCOMPLETE 0x00000004 /* local open channel complete */ |
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#define XPC_C_ROPENREPLY 0x00000008 /* remote open channel reply */ |
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#define XPC_C_OPENREPLY 0x00000010 /* local open channel reply */ |
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#define XPC_C_ROPENREQUEST 0x00000020 /* remote open channel request */ |
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#define XPC_C_OPENREQUEST 0x00000040 /* local open channel request */ |
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#define XPC_C_SETUP 0x00000080 /* channel's msgqueues are alloc'd */ |
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#define XPC_C_CONNECTEDCALLOUT 0x00000100 /* connected callout initiated */ |
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#define XPC_C_CONNECTEDCALLOUT_MADE \ |
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0x00000200 /* connected callout completed */ |
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#define XPC_C_CONNECTED 0x00000400 /* local channel is connected */ |
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#define XPC_C_CONNECTING 0x00000800 /* channel is being connected */ |
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#define XPC_C_RCLOSEREPLY 0x00001000 /* remote close channel reply */ |
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#define XPC_C_CLOSEREPLY 0x00002000 /* local close channel reply */ |
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#define XPC_C_RCLOSEREQUEST 0x00004000 /* remote close channel request */ |
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#define XPC_C_CLOSEREQUEST 0x00008000 /* local close channel request */ |
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#define XPC_C_DISCONNECTED 0x00010000 /* channel is disconnected */ |
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#define XPC_C_DISCONNECTING 0x00020000 /* channel is being disconnected */ |
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#define XPC_C_DISCONNECTINGCALLOUT \ |
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0x00040000 /* disconnecting callout initiated */ |
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#define XPC_C_DISCONNECTINGCALLOUT_MADE \ |
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0x00080000 /* disconnecting callout completed */ |
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#define XPC_C_WDISCONNECT 0x00100000 /* waiting for channel disconnect */ |
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/* |
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* The channel control flags (chctl) union consists of a 64-bit variable which |
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* is divided up into eight bytes, ordered from right to left. Byte zero |
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* pertains to channel 0, byte one to channel 1, and so on. Each channel's byte |
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* can have one or more of the chctl flags set in it. |
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*/ |
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union xpc_channel_ctl_flags { |
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u64 all_flags; |
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u8 flags[XPC_MAX_NCHANNELS]; |
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}; |
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/* chctl flags */ |
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#define XPC_CHCTL_CLOSEREQUEST 0x01 |
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#define XPC_CHCTL_CLOSEREPLY 0x02 |
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#define XPC_CHCTL_OPENREQUEST 0x04 |
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#define XPC_CHCTL_OPENREPLY 0x08 |
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#define XPC_CHCTL_OPENCOMPLETE 0x10 |
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#define XPC_CHCTL_MSGREQUEST 0x20 |
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#define XPC_OPENCLOSE_CHCTL_FLAGS \ |
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(XPC_CHCTL_CLOSEREQUEST | XPC_CHCTL_CLOSEREPLY | \ |
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XPC_CHCTL_OPENREQUEST | XPC_CHCTL_OPENREPLY | \ |
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XPC_CHCTL_OPENCOMPLETE) |
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#define XPC_MSG_CHCTL_FLAGS XPC_CHCTL_MSGREQUEST |
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static inline int |
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xpc_any_openclose_chctl_flags_set(union xpc_channel_ctl_flags *chctl) |
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{ |
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int ch_number; |
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for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++) { |
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if (chctl->flags[ch_number] & XPC_OPENCLOSE_CHCTL_FLAGS) |
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return 1; |
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} |
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return 0; |
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} |
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static inline int |
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xpc_any_msg_chctl_flags_set(union xpc_channel_ctl_flags *chctl) |
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{ |
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int ch_number; |
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for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++) { |
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if (chctl->flags[ch_number] & XPC_MSG_CHCTL_FLAGS) |
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return 1; |
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} |
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return 0; |
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} |
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struct xpc_partition_uv { |
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unsigned long heartbeat_gpa; /* phys addr of partition's heartbeat */ |
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struct xpc_heartbeat_uv cached_heartbeat; /* cached copy of */ |
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/* partition's heartbeat */ |
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unsigned long activate_gru_mq_desc_gpa; /* phys addr of parititon's */ |
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/* activate mq's gru mq */ |
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/* descriptor */ |
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void *cached_activate_gru_mq_desc; /* cached copy of partition's */ |
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/* activate mq's gru mq descriptor */ |
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struct mutex cached_activate_gru_mq_desc_mutex; |
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spinlock_t flags_lock; /* protect updating of flags */ |
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unsigned int flags; /* general flags */ |
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u8 remote_act_state; /* remote partition's act_state */ |
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u8 act_state_req; /* act_state request from remote partition */ |
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enum xp_retval reason; /* reason for deactivate act_state request */ |
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}; |
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/* struct xpc_partition_uv flags */ |
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#define XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV 0x00000001 |
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#define XPC_P_ENGAGED_UV 0x00000002 |
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/* struct xpc_partition_uv act_state change requests */ |
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#define XPC_P_ASR_ACTIVATE_UV 0x01 |
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#define XPC_P_ASR_REACTIVATE_UV 0x02 |
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#define XPC_P_ASR_DEACTIVATE_UV 0x03 |
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struct xpc_partition { |
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/* XPC HB infrastructure */ |
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u8 remote_rp_version; /* version# of partition's rsvd pg */ |
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unsigned long remote_rp_ts_jiffies; /* timestamp when rsvd pg setup */ |
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unsigned long remote_rp_pa; /* phys addr of partition's rsvd pg */ |
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u64 last_heartbeat; /* HB at last read */ |
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u32 activate_IRQ_rcvd; /* IRQs since activation */ |
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spinlock_t act_lock; /* protect updating of act_state */ |
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u8 act_state; /* from XPC HB viewpoint */ |
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enum xp_retval reason; /* reason partition is deactivating */ |
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int reason_line; /* line# deactivation initiated from */ |
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unsigned long disengage_timeout; /* timeout in jiffies */ |
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struct timer_list disengage_timer; |
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/* XPC infrastructure referencing and teardown control */ |
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u8 setup_state; /* infrastructure setup state */ |
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wait_queue_head_t teardown_wq; /* kthread waiting to teardown infra */ |
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atomic_t references; /* #of references to infrastructure */ |
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u8 nchannels; /* #of defined channels supported */ |
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atomic_t nchannels_active; /* #of channels that are not DISCONNECTED */ |
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atomic_t nchannels_engaged; /* #of channels engaged with remote part */ |
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struct xpc_channel *channels; /* array of channel structures */ |
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/* fields used for managing channel avialability and activity */ |
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union xpc_channel_ctl_flags chctl; /* chctl flags yet to be processed */ |
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spinlock_t chctl_lock; /* chctl flags lock */ |
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void *remote_openclose_args_base; /* base address of kmalloc'd space */ |
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struct xpc_openclose_args *remote_openclose_args; /* copy of remote's */ |
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/* args */ |
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/* channel manager related fields */ |
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atomic_t channel_mgr_requests; /* #of requests to activate chan mgr */ |
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wait_queue_head_t channel_mgr_wq; /* channel mgr's wait queue */ |
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union { |
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struct xpc_partition_uv uv; |
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} sn; |
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} ____cacheline_aligned; |
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struct xpc_arch_operations { |
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int (*setup_partitions) (void); |
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void (*teardown_partitions) (void); |
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void (*process_activate_IRQ_rcvd) (void); |
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enum xp_retval (*get_partition_rsvd_page_pa) |
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(void *, u64 *, unsigned long *, size_t *); |
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int (*setup_rsvd_page) (struct xpc_rsvd_page *); |
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void (*allow_hb) (short); |
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void (*disallow_hb) (short); |
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void (*disallow_all_hbs) (void); |
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void (*increment_heartbeat) (void); |
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void (*offline_heartbeat) (void); |
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void (*online_heartbeat) (void); |
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void (*heartbeat_init) (void); |
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void (*heartbeat_exit) (void); |
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enum xp_retval (*get_remote_heartbeat) (struct xpc_partition *); |
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void (*request_partition_activation) (struct xpc_rsvd_page *, |
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unsigned long, int); |
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void (*request_partition_reactivation) (struct xpc_partition *); |
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void (*request_partition_deactivation) (struct xpc_partition *); |
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void (*cancel_partition_deactivation_request) (struct xpc_partition *); |
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enum xp_retval (*setup_ch_structures) (struct xpc_partition *); |
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void (*teardown_ch_structures) (struct xpc_partition *); |
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enum xp_retval (*make_first_contact) (struct xpc_partition *); |
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u64 (*get_chctl_all_flags) (struct xpc_partition *); |
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void (*send_chctl_closerequest) (struct xpc_channel *, unsigned long *); |
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void (*send_chctl_closereply) (struct xpc_channel *, unsigned long *); |
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void (*send_chctl_openrequest) (struct xpc_channel *, unsigned long *); |
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void (*send_chctl_openreply) (struct xpc_channel *, unsigned long *); |
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void (*send_chctl_opencomplete) (struct xpc_channel *, unsigned long *); |
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void (*process_msg_chctl_flags) (struct xpc_partition *, int); |
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enum xp_retval (*save_remote_msgqueue_pa) (struct xpc_channel *, |
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unsigned long); |
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enum xp_retval (*setup_msg_structures) (struct xpc_channel *); |
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void (*teardown_msg_structures) (struct xpc_channel *); |
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void (*indicate_partition_engaged) (struct xpc_partition *); |
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void (*indicate_partition_disengaged) (struct xpc_partition *); |
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void (*assume_partition_disengaged) (short); |
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int (*partition_engaged) (short); |
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int (*any_partition_engaged) (void); |
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int (*n_of_deliverable_payloads) (struct xpc_channel *); |
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enum xp_retval (*send_payload) (struct xpc_channel *, u32, void *, |
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u16, u8, xpc_notify_func, void *); |
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void *(*get_deliverable_payload) (struct xpc_channel *); |
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void (*received_payload) (struct xpc_channel *, void *); |
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void (*notify_senders_of_disconnect) (struct xpc_channel *); |
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}; |
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/* struct xpc_partition act_state values (for XPC HB) */ |
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#define XPC_P_AS_INACTIVE 0x00 /* partition is not active */ |
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#define XPC_P_AS_ACTIVATION_REQ 0x01 /* created thread to activate */ |
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#define XPC_P_AS_ACTIVATING 0x02 /* activation thread started */ |
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#define XPC_P_AS_ACTIVE 0x03 /* xpc_partition_up() was called */ |
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#define XPC_P_AS_DEACTIVATING 0x04 /* partition deactivation initiated */ |
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#define XPC_DEACTIVATE_PARTITION(_p, _reason) \ |
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xpc_deactivate_partition(__LINE__, (_p), (_reason)) |
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/* struct xpc_partition setup_state values */ |
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#define XPC_P_SS_UNSET 0x00 /* infrastructure was never setup */ |
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#define XPC_P_SS_SETUP 0x01 /* infrastructure is setup */ |
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#define XPC_P_SS_WTEARDOWN 0x02 /* waiting to teardown infrastructure */ |
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#define XPC_P_SS_TORNDOWN 0x03 /* infrastructure is torndown */ |
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/* number of seconds to wait for other partitions to disengage */ |
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#define XPC_DISENGAGE_DEFAULT_TIMELIMIT 90 |
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/* interval in seconds to print 'waiting deactivation' messages */ |
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#define XPC_DEACTIVATE_PRINTMSG_INTERVAL 10 |
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#define XPC_PARTID(_p) ((short)((_p) - &xpc_partitions[0])) |
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/* found in xp_main.c */ |
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extern struct xpc_registration xpc_registrations[]; |
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/* found in xpc_main.c */ |
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extern struct device *xpc_part; |
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extern struct device *xpc_chan; |
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extern struct xpc_arch_operations xpc_arch_ops; |
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extern int xpc_disengage_timelimit; |
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extern int xpc_disengage_timedout; |
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extern int xpc_activate_IRQ_rcvd; |
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extern spinlock_t xpc_activate_IRQ_rcvd_lock; |
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extern wait_queue_head_t xpc_activate_IRQ_wq; |
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extern void *xpc_kzalloc_cacheline_aligned(size_t, gfp_t, void **); |
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extern void xpc_activate_partition(struct xpc_partition *); |
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extern void xpc_activate_kthreads(struct xpc_channel *, int); |
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extern void xpc_create_kthreads(struct xpc_channel *, int, int); |
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extern void xpc_disconnect_wait(int); |
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/* found in xpc_uv.c */ |
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extern int xpc_init_uv(void); |
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extern void xpc_exit_uv(void); |
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/* found in xpc_partition.c */ |
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extern int xpc_exiting; |
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extern int xpc_nasid_mask_nlongs; |
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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 int xpc_partition_disengaged_from_timer(struct xpc_partition *part); |
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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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