Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
Dean Nelson | 45d9ca4 | 2008-04-22 14:46:56 -0500 | [diff] [blame] | 6 | * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved. |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 9 | /* |
| 10 | * Cross Partition Communication (XPC) structures and macros. |
| 11 | */ |
| 12 | |
Dean Nelson | 45d9ca4 | 2008-04-22 14:46:56 -0500 | [diff] [blame] | 13 | #ifndef _DRIVERS_MISC_SGIXP_XPC_H |
| 14 | #define _DRIVERS_MISC_SGIXP_XPC_H |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 15 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 16 | #include <linux/interrupt.h> |
| 17 | #include <linux/sysctl.h> |
| 18 | #include <linux/device.h> |
Jes Sorensen | f9e505a | 2006-01-17 12:52:21 -0500 | [diff] [blame] | 19 | #include <linux/mutex.h> |
| 20 | #include <linux/completion.h> |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 21 | #include <asm/pgtable.h> |
| 22 | #include <asm/processor.h> |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 23 | #include <asm/sn/clksupport.h> |
| 24 | #include <asm/sn/addrs.h> |
| 25 | #include <asm/sn/mspec.h> |
| 26 | #include <asm/sn/shub_mmr.h> |
Dean Nelson | 45d9ca4 | 2008-04-22 14:46:56 -0500 | [diff] [blame] | 27 | #include "xp.h" |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 28 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 29 | /* |
| 30 | * XPC Version numbers consist of a major and minor number. XPC can always |
| 31 | * talk to versions with same major #, and never talk to versions with a |
| 32 | * different major #. |
| 33 | */ |
| 34 | #define _XPC_VERSION(_maj, _min) (((_maj) << 4) | ((_min) & 0xf)) |
| 35 | #define XPC_VERSION_MAJOR(_v) ((_v) >> 4) |
| 36 | #define XPC_VERSION_MINOR(_v) ((_v) & 0xf) |
| 37 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 38 | /* |
| 39 | * The next macros define word or bit representations for given |
| 40 | * C-brick nasid in either the SAL provided bit array representing |
Dean Nelson | c39838c | 2008-07-29 22:34:11 -0700 | [diff] [blame^] | 41 | * nasids in the partition/machine or the array of amo structures used |
| 42 | * for inter-partition initiation communications. |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 43 | * |
| 44 | * For SN2 machines, C-Bricks are alway even numbered NASIDs. As |
| 45 | * such, some space will be saved by insisting that nasid information |
| 46 | * passed from SAL always be packed for C-Bricks and the |
| 47 | * cross-partition interrupts use the same packing scheme. |
| 48 | */ |
| 49 | #define XPC_NASID_W_INDEX(_n) (((_n) / 64) / 2) |
| 50 | #define XPC_NASID_B_INDEX(_n) (((_n) / 2) & (64 - 1)) |
| 51 | #define XPC_NASID_IN_ARRAY(_n, _p) ((_p)[XPC_NASID_W_INDEX(_n)] & \ |
| 52 | (1UL << XPC_NASID_B_INDEX(_n))) |
| 53 | #define XPC_NASID_FROM_W_B(_w, _b) (((_w) * 64 + (_b)) * 2) |
| 54 | |
| 55 | #define XPC_HB_DEFAULT_INTERVAL 5 /* incr HB every x secs */ |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 56 | #define XPC_HB_CHECK_DEFAULT_INTERVAL 20 /* check HB every x secs */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 57 | |
| 58 | /* define the process name of HB checker and the CPU it is pinned to */ |
| 59 | #define XPC_HB_CHECK_THREAD_NAME "xpc_hb" |
| 60 | #define XPC_HB_CHECK_CPU 0 |
| 61 | |
| 62 | /* define the process name of the discovery thread */ |
| 63 | #define XPC_DISCOVERY_THREAD_NAME "xpc_discovery" |
| 64 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 65 | /* |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 66 | * the reserved page |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 67 | * |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 68 | * SAL reserves one page of memory per partition for XPC. Though a full page |
| 69 | * in length (16384 bytes), its starting address is not page aligned, but it |
| 70 | * is cacheline aligned. The reserved page consists of the following: |
| 71 | * |
| 72 | * reserved page header |
| 73 | * |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 74 | * The first two 64-byte cachelines of the reserved page contain the |
| 75 | * header (struct xpc_rsvd_page). Before SAL initialization has completed, |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 76 | * SAL has set up the following fields of the reserved page header: |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 77 | * SAL_signature, SAL_version, SAL_partid, and SAL_nasids_size. The |
| 78 | * other fields are set up by XPC. (xpc_rsvd_page points to the local |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 79 | * partition's reserved page.) |
| 80 | * |
| 81 | * part_nasids mask |
| 82 | * mach_nasids mask |
| 83 | * |
| 84 | * SAL also sets up two bitmaps (or masks), one that reflects the actual |
| 85 | * nasids in this partition (part_nasids), and the other that reflects |
| 86 | * the actual nasids in the entire machine (mach_nasids). We're only |
| 87 | * interested in the even numbered nasids (which contain the processors |
| 88 | * and/or memory), so we only need half as many bits to represent the |
| 89 | * nasids. The part_nasids mask is located starting at the first cacheline |
| 90 | * following the reserved page header. The mach_nasids mask follows right |
| 91 | * after the part_nasids mask. The size in bytes of each mask is reflected |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 92 | * by the reserved page header field 'SAL_nasids_size'. (Local partition's |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 93 | * mask pointers are xpc_part_nasids and xpc_mach_nasids.) |
| 94 | * |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 95 | * vars (ia64-sn2 only) |
| 96 | * vars part (ia64-sn2 only) |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 97 | * |
| 98 | * Immediately following the mach_nasids mask are the XPC variables |
| 99 | * required by other partitions. First are those that are generic to all |
| 100 | * partitions (vars), followed on the next available cacheline by those |
| 101 | * which are partition specific (vars part). These are setup by XPC. |
| 102 | * (Local partition's vars pointers are xpc_vars and xpc_vars_part.) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 103 | * |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 104 | * Note: Until 'stamp' is set non-zero, the partition XPC code has not been |
| 105 | * initialized. |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 106 | */ |
| 107 | struct xpc_rsvd_page { |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 108 | u64 SAL_signature; /* SAL: unique signature */ |
| 109 | u64 SAL_version; /* SAL: version */ |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 110 | short SAL_partid; /* SAL: partition ID */ |
| 111 | short max_npartitions; /* value of XPC_MAX_PARTITIONS */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 112 | u8 version; |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 113 | u8 pad1[3]; /* align to next u64 in 1st 64-byte cacheline */ |
| 114 | union { |
| 115 | u64 vars_pa; /* physical address of struct xpc_vars */ |
| 116 | u64 activate_mq_gpa; /* global phys address of activate_mq */ |
| 117 | } sn; |
Dean Nelson | aaa3cd6 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 118 | unsigned long stamp; /* time when reserved page was setup by XPC */ |
| 119 | u64 pad2[10]; /* align to last u64 in 2nd 64-byte cacheline */ |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 120 | u64 SAL_nasids_size; /* SAL: size of each nasid mask in bytes */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 121 | }; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 122 | |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 123 | #define XPC_RP_VERSION _XPC_VERSION(2, 0) /* version 2.0 of the reserved page */ |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 124 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 125 | /* |
| 126 | * Define the structures by which XPC variables can be exported to other |
| 127 | * partitions. (There are two: struct xpc_vars and struct xpc_vars_part) |
| 128 | */ |
| 129 | |
| 130 | /* |
| 131 | * The following structure describes the partition generic variables |
| 132 | * needed by other partitions in order to properly initialize. |
| 133 | * |
| 134 | * struct xpc_vars version number also applies to struct xpc_vars_part. |
| 135 | * Changes to either structure and/or related functionality should be |
| 136 | * reflected by incrementing either the major or minor version numbers |
| 137 | * of struct xpc_vars. |
| 138 | */ |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 139 | struct xpc_vars_sn2 { |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 140 | u8 version; |
| 141 | u64 heartbeat; |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 142 | DECLARE_BITMAP(heartbeating_to_mask, XP_MAX_NPARTITIONS_SN2); |
Dean Nelson | 780d09e | 2005-11-09 14:41:57 -0600 | [diff] [blame] | 143 | u64 heartbeat_offline; /* if 0, heartbeat should be changing */ |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 144 | int activate_IRQ_nasid; |
| 145 | int activate_IRQ_phys_cpuid; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 146 | u64 vars_part_pa; |
Dean Nelson | c39838c | 2008-07-29 22:34:11 -0700 | [diff] [blame^] | 147 | u64 amos_page_pa; /* paddr of page of amos from MSPEC driver */ |
| 148 | struct amo *amos_page; /* vaddr of page of amos from MSPEC driver */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 149 | }; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 150 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 151 | #define XPC_V_VERSION _XPC_VERSION(3, 1) /* version 3.1 of the cross vars */ |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 152 | |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 153 | /* |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 154 | * The following pertains to ia64-sn2 only. |
| 155 | * |
Dean Nelson | c39838c | 2008-07-29 22:34:11 -0700 | [diff] [blame^] | 156 | * Memory for XPC's amo variables is allocated by the MSPEC driver. These |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 157 | * pages are located in the lowest granule. The lowest granule uses 4k pages |
| 158 | * for cached references and an alternate TLB handler to never provide a |
| 159 | * cacheable mapping for the entire region. This will prevent speculative |
| 160 | * reading of cached copies of our lines from being issued which will cause |
| 161 | * a PI FSB Protocol error to be generated by the SHUB. For XPC, we need 64 |
Dean Nelson | c39838c | 2008-07-29 22:34:11 -0700 | [diff] [blame^] | 162 | * amo variables (based on XP_MAX_NPARTITIONS_SN2) to identify the senders of |
| 163 | * NOTIFY IRQs, 128 amo variables (based on XP_NASID_MASK_WORDS) to identify |
| 164 | * the senders of ACTIVATE IRQs, 1 amo variable to identify which remote |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 165 | * partitions (i.e., XPCs) consider themselves currently engaged with the |
Dean Nelson | c39838c | 2008-07-29 22:34:11 -0700 | [diff] [blame^] | 166 | * local XPC and 1 amo variable to request partition deactivation. |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 167 | */ |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 168 | #define XPC_NOTIFY_IRQ_AMOS 0 |
| 169 | #define XPC_ACTIVATE_IRQ_AMOS (XPC_NOTIFY_IRQ_AMOS + XP_MAX_NPARTITIONS_SN2) |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 170 | #define XPC_ENGAGED_PARTITIONS_AMO (XPC_ACTIVATE_IRQ_AMOS + XP_NASID_MASK_WORDS) |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 171 | #define XPC_DEACTIVATE_REQUEST_AMO (XPC_ENGAGED_PARTITIONS_AMO + 1) |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 172 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 173 | /* |
| 174 | * The following structure describes the per partition specific variables. |
| 175 | * |
| 176 | * An array of these structures, one per partition, will be defined. As a |
| 177 | * partition becomes active XPC will copy the array entry corresponding to |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 178 | * itself from that partition. It is desirable that the size of this structure |
| 179 | * evenly divides into a 128-byte cacheline, such that none of the entries in |
| 180 | * this array crosses a 128-byte cacheline boundary. As it is now, each entry |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 181 | * occupies 64-bytes. |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 182 | */ |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 183 | struct xpc_vars_part_sn2 { |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 184 | u64 magic; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 185 | |
| 186 | u64 openclose_args_pa; /* physical address of open and close args */ |
| 187 | u64 GPs_pa; /* physical address of Get/Put values */ |
| 188 | |
Dean Nelson | c39838c | 2008-07-29 22:34:11 -0700 | [diff] [blame^] | 189 | u64 chctl_amo_pa; /* physical address of chctl flags' amo */ |
Dean Nelson | 7fb5e59 | 2008-07-29 22:34:10 -0700 | [diff] [blame] | 190 | |
| 191 | int notify_IRQ_nasid; /* nasid of where to send notify IRQs */ |
| 192 | int notify_IRQ_phys_cpuid; /* CPUID of where to send notify IRQs */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 193 | |
| 194 | u8 nchannels; /* #of defined channels supported */ |
| 195 | |
| 196 | u8 reserved[23]; /* pad to a full 64 bytes */ |
| 197 | }; |
| 198 | |
| 199 | /* |
| 200 | * The vars_part MAGIC numbers play a part in the first contact protocol. |
| 201 | * |
| 202 | * MAGIC1 indicates that the per partition specific variables for a remote |
| 203 | * partition have been initialized by this partition. |
| 204 | * |
| 205 | * MAGIC2 indicates that this partition has pulled the remote partititions |
| 206 | * per partition variables that pertain to this partition. |
| 207 | */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 208 | #define XPC_VP_MAGIC1 0x0053524156435058L /* 'XPCVARS\0'L (little endian) */ |
| 209 | #define XPC_VP_MAGIC2 0x0073726176435058L /* 'XPCvars\0'L (little endian) */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 210 | |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 211 | /* the reserved page sizes and offsets */ |
| 212 | |
| 213 | #define XPC_RP_HEADER_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_rsvd_page)) |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 214 | #define XPC_RP_VARS_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_vars_sn2)) |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 215 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 216 | #define XPC_RP_PART_NASIDS(_rp) ((u64 *)((u8 *)(_rp) + XPC_RP_HEADER_SIZE)) |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 217 | #define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + xp_nasid_mask_words) |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 218 | #define XPC_RP_VARS(_rp) ((struct xpc_vars_sn2 *)(XPC_RP_MACH_NASIDS(_rp) + \ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 219 | xp_nasid_mask_words)) |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 220 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 221 | /* |
| 222 | * Functions registered by add_timer() or called by kernel_thread() only |
| 223 | * allow for a single 64-bit argument. The following macros can be used to |
| 224 | * pack and unpack two (32-bit, 16-bit or 8-bit) arguments into or out from |
| 225 | * the passed argument. |
| 226 | */ |
| 227 | #define XPC_PACK_ARGS(_arg1, _arg2) \ |
| 228 | ((((u64) _arg1) & 0xffffffff) | \ |
| 229 | ((((u64) _arg2) & 0xffffffff) << 32)) |
| 230 | |
| 231 | #define XPC_UNPACK_ARG1(_args) (((u64) _args) & 0xffffffff) |
| 232 | #define XPC_UNPACK_ARG2(_args) ((((u64) _args) >> 32) & 0xffffffff) |
| 233 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 234 | /* |
| 235 | * Define a Get/Put value pair (pointers) used with a message queue. |
| 236 | */ |
| 237 | struct xpc_gp { |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 238 | s64 get; /* Get value */ |
| 239 | s64 put; /* Put value */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 240 | }; |
| 241 | |
| 242 | #define XPC_GP_SIZE \ |
Dean Nelson | bc63d38 | 2008-07-29 22:34:04 -0700 | [diff] [blame] | 243 | L1_CACHE_ALIGN(sizeof(struct xpc_gp) * XPC_MAX_NCHANNELS) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 244 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 245 | /* |
| 246 | * Define a structure that contains arguments associated with opening and |
| 247 | * closing a channel. |
| 248 | */ |
| 249 | struct xpc_openclose_args { |
| 250 | u16 reason; /* reason why channel is closing */ |
| 251 | u16 msg_size; /* sizeof each message entry */ |
| 252 | u16 remote_nentries; /* #of message entries in remote msg queue */ |
| 253 | u16 local_nentries; /* #of message entries in local msg queue */ |
| 254 | u64 local_msgqueue_pa; /* physical address of local message queue */ |
| 255 | }; |
| 256 | |
| 257 | #define XPC_OPENCLOSE_ARGS_SIZE \ |
Dean Nelson | bc63d38 | 2008-07-29 22:34:04 -0700 | [diff] [blame] | 258 | L1_CACHE_ALIGN(sizeof(struct xpc_openclose_args) * \ |
| 259 | XPC_MAX_NCHANNELS) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 260 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 261 | /* struct xpc_msg flags */ |
| 262 | |
| 263 | #define XPC_M_DONE 0x01 /* msg has been received/consumed */ |
| 264 | #define XPC_M_READY 0x02 /* msg is ready to be sent */ |
| 265 | #define XPC_M_INTERRUPT 0x04 /* send interrupt when msg consumed */ |
| 266 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 267 | #define XPC_MSG_ADDRESS(_payload) \ |
| 268 | ((struct xpc_msg *)((u8 *)(_payload) - XPC_MSG_PAYLOAD_OFFSET)) |
| 269 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 270 | /* |
| 271 | * Defines notify entry. |
| 272 | * |
| 273 | * This is used to notify a message's sender that their message was received |
| 274 | * and consumed by the intended recipient. |
| 275 | */ |
| 276 | struct xpc_notify { |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 277 | u8 type; /* type of notification */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 278 | |
| 279 | /* the following two fields are only used if type == XPC_N_CALL */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 280 | xpc_notify_func func; /* user's notify function */ |
| 281 | void *key; /* pointer to user's key */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 282 | }; |
| 283 | |
| 284 | /* struct xpc_notify type of notification */ |
| 285 | |
| 286 | #define XPC_N_CALL 0x01 /* notify function provided by user */ |
| 287 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 288 | /* |
| 289 | * Define the structure that manages all the stuff required by a channel. In |
| 290 | * particular, they are used to manage the messages sent across the channel. |
| 291 | * |
| 292 | * This structure is private to a partition, and is NOT shared across the |
| 293 | * partition boundary. |
| 294 | * |
| 295 | * There is an array of these structures for each remote partition. It is |
| 296 | * allocated at the time a partition becomes active. The array contains one |
| 297 | * of these structures for each potential channel connection to that partition. |
| 298 | * |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 299 | >>> sn2 only!!! |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 300 | * Each of these structures manages two message queues (circular buffers). |
| 301 | * They are allocated at the time a channel connection is made. One of |
| 302 | * these message queues (local_msgqueue) holds the locally created messages |
| 303 | * that are destined for the remote partition. The other of these message |
| 304 | * queues (remote_msgqueue) is a locally cached copy of the remote partition's |
| 305 | * own local_msgqueue. |
| 306 | * |
| 307 | * The following is a description of the Get/Put pointers used to manage these |
| 308 | * two message queues. Consider the local_msgqueue to be on one partition |
| 309 | * and the remote_msgqueue to be its cached copy on another partition. A |
| 310 | * description of what each of the lettered areas contains is included. |
| 311 | * |
| 312 | * |
| 313 | * local_msgqueue remote_msgqueue |
| 314 | * |
| 315 | * |/////////| |/////////| |
| 316 | * w_remote_GP.get --> +---------+ |/////////| |
| 317 | * | F | |/////////| |
| 318 | * remote_GP.get --> +---------+ +---------+ <-- local_GP->get |
| 319 | * | | | | |
| 320 | * | | | E | |
| 321 | * | | | | |
| 322 | * | | +---------+ <-- w_local_GP.get |
| 323 | * | B | |/////////| |
| 324 | * | | |////D////| |
| 325 | * | | |/////////| |
| 326 | * | | +---------+ <-- w_remote_GP.put |
| 327 | * | | |////C////| |
| 328 | * local_GP->put --> +---------+ +---------+ <-- remote_GP.put |
| 329 | * | | |/////////| |
| 330 | * | A | |/////////| |
| 331 | * | | |/////////| |
| 332 | * w_local_GP.put --> +---------+ |/////////| |
| 333 | * |/////////| |/////////| |
| 334 | * |
| 335 | * |
| 336 | * ( remote_GP.[get|put] are cached copies of the remote |
| 337 | * partition's local_GP->[get|put], and thus their values can |
| 338 | * lag behind their counterparts on the remote partition. ) |
| 339 | * |
| 340 | * |
| 341 | * A - Messages that have been allocated, but have not yet been sent to the |
| 342 | * remote partition. |
| 343 | * |
| 344 | * B - Messages that have been sent, but have not yet been acknowledged by the |
| 345 | * remote partition as having been received. |
| 346 | * |
| 347 | * C - Area that needs to be prepared for the copying of sent messages, by |
| 348 | * the clearing of the message flags of any previously received messages. |
| 349 | * |
| 350 | * D - Area into which sent messages are to be copied from the remote |
| 351 | * partition's local_msgqueue and then delivered to their intended |
| 352 | * recipients. [ To allow for a multi-message copy, another pointer |
| 353 | * (next_msg_to_pull) has been added to keep track of the next message |
| 354 | * number needing to be copied (pulled). It chases after w_remote_GP.put. |
| 355 | * Any messages lying between w_local_GP.get and next_msg_to_pull have |
| 356 | * been copied and are ready to be delivered. ] |
| 357 | * |
| 358 | * E - Messages that have been copied and delivered, but have not yet been |
| 359 | * acknowledged by the recipient as having been received. |
| 360 | * |
| 361 | * F - Messages that have been acknowledged, but XPC has not yet notified the |
| 362 | * sender that the message was received by its intended recipient. |
| 363 | * This is also an area that needs to be prepared for the allocating of |
| 364 | * new messages, by the clearing of the message flags of the acknowledged |
| 365 | * messages. |
| 366 | */ |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 367 | struct xpc_channel_sn2 { |
| 368 | |
| 369 | /* various flavors of local and remote Get/Put values */ |
| 370 | |
| 371 | struct xpc_gp *local_GP; /* local Get/Put values */ |
| 372 | struct xpc_gp remote_GP; /* remote Get/Put values */ |
| 373 | struct xpc_gp w_local_GP; /* working local Get/Put values */ |
| 374 | struct xpc_gp w_remote_GP; /* working remote Get/Put values */ |
| 375 | s64 next_msg_to_pull; /* Put value of next msg to pull */ |
| 376 | |
| 377 | struct mutex msg_to_pull_mutex; /* next msg to pull serialization */ |
| 378 | }; |
| 379 | |
| 380 | struct xpc_channel_uv { |
| 381 | /* >>> code is coming */ |
| 382 | }; |
| 383 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 384 | struct xpc_channel { |
Dean Nelson | 64d032b | 2008-05-12 14:02:03 -0700 | [diff] [blame] | 385 | short partid; /* ID of remote partition connected */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 386 | spinlock_t lock; /* lock for updating this structure */ |
| 387 | u32 flags; /* general flags */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 388 | |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 389 | enum xp_retval reason; /* reason why channel is disconnect'g */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 390 | int reason_line; /* line# disconnect initiated from */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 391 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 392 | u16 number; /* channel # */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 393 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 394 | u16 msg_size; /* sizeof each msg entry */ |
| 395 | u16 local_nentries; /* #of msg entries in local msg queue */ |
| 396 | u16 remote_nentries; /* #of msg entries in remote msg queue */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 397 | |
| 398 | void *local_msgqueue_base; /* base address of kmalloc'd space */ |
| 399 | struct xpc_msg *local_msgqueue; /* local message queue */ |
| 400 | void *remote_msgqueue_base; /* base address of kmalloc'd space */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 401 | struct xpc_msg *remote_msgqueue; /* cached copy of remote partition's */ |
| 402 | /* local message queue */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 403 | u64 remote_msgqueue_pa; /* phys addr of remote partition's */ |
| 404 | /* local message queue */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 405 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 406 | atomic_t references; /* #of external references to queues */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 407 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 408 | atomic_t n_on_msg_allocate_wq; /* #on msg allocation wait queue */ |
| 409 | wait_queue_head_t msg_allocate_wq; /* msg allocation wait queue */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 410 | |
Dean Nelson | 7fb5e59 | 2008-07-29 22:34:10 -0700 | [diff] [blame] | 411 | u8 delayed_chctl_flags; /* chctl flags received, but delayed */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 412 | /* action until channel disconnected */ |
Dean Nelson | e54af72 | 2005-10-25 14:07:43 -0500 | [diff] [blame] | 413 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 414 | /* queue of msg senders who want to be notified when msg received */ |
| 415 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 416 | atomic_t n_to_notify; /* #of msg senders to notify */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 417 | struct xpc_notify *notify_queue; /* notify queue for messages sent */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 418 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 419 | xpc_channel_func func; /* user's channel function */ |
| 420 | void *key; /* pointer to user's key */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 421 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 422 | struct completion wdisconnect_wait; /* wait for channel disconnect */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 423 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 424 | struct xpc_openclose_args *local_openclose_args; /* args passed on */ |
| 425 | /* opening or closing of channel */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 426 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 427 | /* kthread management related fields */ |
| 428 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 429 | atomic_t kthreads_assigned; /* #of kthreads assigned to channel */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 430 | u32 kthreads_assigned_limit; /* limit on #of kthreads assigned */ |
| 431 | atomic_t kthreads_idle; /* #of kthreads idle waiting for work */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 432 | u32 kthreads_idle_limit; /* limit on #of kthreads idle */ |
| 433 | atomic_t kthreads_active; /* #of kthreads actively working */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 434 | |
| 435 | wait_queue_head_t idle_wq; /* idle kthread wait queue */ |
| 436 | |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 437 | union { |
| 438 | struct xpc_channel_sn2 sn2; |
| 439 | struct xpc_channel_uv uv; |
| 440 | } sn; |
| 441 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 442 | } ____cacheline_aligned; |
| 443 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 444 | /* struct xpc_channel flags */ |
| 445 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 446 | #define XPC_C_WASCONNECTED 0x00000001 /* channel was connected */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 447 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 448 | #define XPC_C_ROPENREPLY 0x00000002 /* remote open channel reply */ |
| 449 | #define XPC_C_OPENREPLY 0x00000004 /* local open channel reply */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 450 | #define XPC_C_ROPENREQUEST 0x00000008 /* remote open channel request */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 451 | #define XPC_C_OPENREQUEST 0x00000010 /* local open channel request */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 452 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 453 | #define XPC_C_SETUP 0x00000020 /* channel's msgqueues are alloc'd */ |
| 454 | #define XPC_C_CONNECTEDCALLOUT 0x00000040 /* connected callout initiated */ |
Dean Nelson | 4c2cd96 | 2006-02-15 08:02:21 -0600 | [diff] [blame] | 455 | #define XPC_C_CONNECTEDCALLOUT_MADE \ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 456 | 0x00000080 /* connected callout completed */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 457 | #define XPC_C_CONNECTED 0x00000100 /* local channel is connected */ |
| 458 | #define XPC_C_CONNECTING 0x00000200 /* channel is being connected */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 459 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 460 | #define XPC_C_RCLOSEREPLY 0x00000400 /* remote close channel reply */ |
| 461 | #define XPC_C_CLOSEREPLY 0x00000800 /* local close channel reply */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 462 | #define XPC_C_RCLOSEREQUEST 0x00001000 /* remote close channel request */ |
| 463 | #define XPC_C_CLOSEREQUEST 0x00002000 /* local close channel request */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 464 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 465 | #define XPC_C_DISCONNECTED 0x00004000 /* channel is disconnected */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 466 | #define XPC_C_DISCONNECTING 0x00008000 /* channel is being disconnected */ |
Dean Nelson | 4c2cd96 | 2006-02-15 08:02:21 -0600 | [diff] [blame] | 467 | #define XPC_C_DISCONNECTINGCALLOUT \ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 468 | 0x00010000 /* disconnecting callout initiated */ |
Dean Nelson | 4c2cd96 | 2006-02-15 08:02:21 -0600 | [diff] [blame] | 469 | #define XPC_C_DISCONNECTINGCALLOUT_MADE \ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 470 | 0x00020000 /* disconnecting callout completed */ |
| 471 | #define XPC_C_WDISCONNECT 0x00040000 /* waiting for channel disconnect */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 472 | |
| 473 | /* |
Dean Nelson | 7fb5e59 | 2008-07-29 22:34:10 -0700 | [diff] [blame] | 474 | * The channel control flags (chctl) union consists of a 64-bit variable which |
| 475 | * is divided up into eight bytes, ordered from right to left. Byte zero |
| 476 | * pertains to channel 0, byte one to channel 1, and so on. Each channel's byte |
| 477 | * can have one or more of the chctl flags set in it. |
| 478 | */ |
| 479 | |
| 480 | union xpc_channel_ctl_flags { |
| 481 | u64 all_flags; |
| 482 | u8 flags[XPC_MAX_NCHANNELS]; |
| 483 | }; |
| 484 | |
| 485 | /* chctl flags */ |
| 486 | #define XPC_CHCTL_CLOSEREQUEST 0x01 |
| 487 | #define XPC_CHCTL_CLOSEREPLY 0x02 |
| 488 | #define XPC_CHCTL_OPENREQUEST 0x04 |
| 489 | #define XPC_CHCTL_OPENREPLY 0x08 |
| 490 | #define XPC_CHCTL_MSGREQUEST 0x10 |
| 491 | |
| 492 | #define XPC_OPENCLOSE_CHCTL_FLAGS \ |
| 493 | (XPC_CHCTL_CLOSEREQUEST | XPC_CHCTL_CLOSEREPLY | \ |
| 494 | XPC_CHCTL_OPENREQUEST | XPC_CHCTL_OPENREPLY) |
| 495 | #define XPC_MSG_CHCTL_FLAGS XPC_CHCTL_MSGREQUEST |
| 496 | |
| 497 | static inline int |
| 498 | xpc_any_openclose_chctl_flags_set(union xpc_channel_ctl_flags *chctl) |
| 499 | { |
| 500 | int ch_number; |
| 501 | |
| 502 | for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++) { |
| 503 | if (chctl->flags[ch_number] & XPC_OPENCLOSE_CHCTL_FLAGS) |
| 504 | return 1; |
| 505 | } |
| 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | static inline int |
| 510 | xpc_any_msg_chctl_flags_set(union xpc_channel_ctl_flags *chctl) |
| 511 | { |
| 512 | int ch_number; |
| 513 | |
| 514 | for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++) { |
| 515 | if (chctl->flags[ch_number] & XPC_MSG_CHCTL_FLAGS) |
| 516 | return 1; |
| 517 | } |
| 518 | return 0; |
| 519 | } |
| 520 | |
| 521 | /* |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 522 | * Manages channels on a partition basis. There is one of these structures |
| 523 | * for each partition (a partition will never utilize the structure that |
| 524 | * represents itself). |
| 525 | */ |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 526 | |
| 527 | struct xpc_partition_sn2 { |
| 528 | u64 remote_amos_page_pa; /* phys addr of partition's amos page */ |
| 529 | int activate_IRQ_nasid; /* active partition's act/deact nasid */ |
| 530 | int activate_IRQ_phys_cpuid; /* active part's act/deact phys cpuid */ |
| 531 | |
| 532 | u64 remote_vars_pa; /* phys addr of partition's vars */ |
| 533 | u64 remote_vars_part_pa; /* phys addr of partition's vars part */ |
| 534 | u8 remote_vars_version; /* version# of partition's vars */ |
| 535 | |
| 536 | void *local_GPs_base; /* base address of kmalloc'd space */ |
| 537 | struct xpc_gp *local_GPs; /* local Get/Put values */ |
| 538 | void *remote_GPs_base; /* base address of kmalloc'd space */ |
| 539 | struct xpc_gp *remote_GPs; /* copy of remote partition's local */ |
| 540 | /* Get/Put values */ |
| 541 | u64 remote_GPs_pa; /* phys address of remote partition's local */ |
| 542 | /* Get/Put values */ |
| 543 | |
| 544 | u64 remote_openclose_args_pa; /* phys addr of remote's args */ |
| 545 | |
Dean Nelson | 7fb5e59 | 2008-07-29 22:34:10 -0700 | [diff] [blame] | 546 | int notify_IRQ_nasid; /* nasid of where to send notify IRQs */ |
| 547 | int notify_IRQ_phys_cpuid; /* CPUID of where to send notify IRQs */ |
| 548 | char notify_IRQ_owner[8]; /* notify IRQ's owner's name */ |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 549 | |
Dean Nelson | c39838c | 2008-07-29 22:34:11 -0700 | [diff] [blame^] | 550 | struct amo *remote_chctl_amo_va; /* addr of remote chctl flags' amo */ |
| 551 | struct amo *local_chctl_amo_va; /* address of chctl flags' amo */ |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 552 | |
| 553 | struct timer_list dropped_notify_IRQ_timer; /* dropped IRQ timer */ |
| 554 | }; |
| 555 | |
| 556 | struct xpc_partition_uv { |
| 557 | /* >>> code is coming */ |
| 558 | }; |
| 559 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 560 | struct xpc_partition { |
| 561 | |
| 562 | /* XPC HB infrastructure */ |
| 563 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 564 | u8 remote_rp_version; /* version# of partition's rsvd pg */ |
Dean Nelson | aaa3cd6 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 565 | unsigned long remote_rp_stamp; /* time when rsvd pg was initialized */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 566 | u64 remote_rp_pa; /* phys addr of partition's rsvd pg */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 567 | u64 last_heartbeat; /* HB at last read */ |
Dean Nelson | 6e41017 | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 568 | u32 activate_IRQ_rcvd; /* IRQs since activation */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 569 | spinlock_t act_lock; /* protect updating of act_state */ |
| 570 | u8 act_state; /* from XPC HB viewpoint */ |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 571 | enum xp_retval reason; /* reason partition is deactivating */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 572 | int reason_line; /* line# deactivation initiated from */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 573 | |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 574 | unsigned long disengage_timeout; /* timeout in jiffies */ |
| 575 | struct timer_list disengage_timer; |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 576 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 577 | /* XPC infrastructure referencing and teardown control */ |
| 578 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 579 | u8 setup_state; /* infrastructure setup state */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 580 | wait_queue_head_t teardown_wq; /* kthread waiting to teardown infra */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 581 | atomic_t references; /* #of references to infrastructure */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 582 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 583 | u8 nchannels; /* #of defined channels supported */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 584 | atomic_t nchannels_active; /* #of channels that are not DISCONNECTED */ |
| 585 | atomic_t nchannels_engaged; /* #of channels engaged with remote part */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 586 | struct xpc_channel *channels; /* array of channel structures */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 587 | |
Dean Nelson | 7fb5e59 | 2008-07-29 22:34:10 -0700 | [diff] [blame] | 588 | /* fields used for managing channel avialability and activity */ |
| 589 | |
| 590 | union xpc_channel_ctl_flags chctl; /* chctl flags yet to be processed */ |
| 591 | spinlock_t chctl_lock; /* chctl flags lock */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 592 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 593 | void *local_openclose_args_base; /* base address of kmalloc'd space */ |
| 594 | struct xpc_openclose_args *local_openclose_args; /* local's args */ |
| 595 | void *remote_openclose_args_base; /* base address of kmalloc'd space */ |
| 596 | struct xpc_openclose_args *remote_openclose_args; /* copy of remote's */ |
| 597 | /* args */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 598 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 599 | /* channel manager related fields */ |
| 600 | |
| 601 | atomic_t channel_mgr_requests; /* #of requests to activate chan mgr */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 602 | wait_queue_head_t channel_mgr_wq; /* channel mgr's wait queue */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 603 | |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 604 | union { |
| 605 | struct xpc_partition_sn2 sn2; |
| 606 | struct xpc_partition_uv uv; |
| 607 | } sn; |
| 608 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 609 | } ____cacheline_aligned; |
| 610 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 611 | /* struct xpc_partition act_state values (for XPC HB) */ |
| 612 | |
| 613 | #define XPC_P_INACTIVE 0x00 /* partition is not active */ |
| 614 | #define XPC_P_ACTIVATION_REQ 0x01 /* created thread to activate */ |
| 615 | #define XPC_P_ACTIVATING 0x02 /* activation thread started */ |
| 616 | #define XPC_P_ACTIVE 0x03 /* xpc_partition_up() was called */ |
| 617 | #define XPC_P_DEACTIVATING 0x04 /* partition deactivation initiated */ |
| 618 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 619 | #define XPC_DEACTIVATE_PARTITION(_p, _reason) \ |
| 620 | xpc_deactivate_partition(__LINE__, (_p), (_reason)) |
| 621 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 622 | /* struct xpc_partition setup_state values */ |
| 623 | |
| 624 | #define XPC_P_UNSET 0x00 /* infrastructure was never setup */ |
| 625 | #define XPC_P_SETUP 0x01 /* infrastructure is setup */ |
| 626 | #define XPC_P_WTEARDOWN 0x02 /* waiting to teardown infrastructure */ |
| 627 | #define XPC_P_TORNDOWN 0x03 /* infrastructure is torndown */ |
| 628 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 629 | /* |
Dean Nelson | 7fb5e59 | 2008-07-29 22:34:10 -0700 | [diff] [blame] | 630 | * struct xpc_partition_sn2's dropped notify IRQ timer is set to wait the |
| 631 | * following interval #of seconds before checking for dropped notify IRQs. |
| 632 | * These can occur whenever an IRQ's associated amo write doesn't complete |
| 633 | * until after the IRQ was received. |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 634 | */ |
Dean Nelson | 7fb5e59 | 2008-07-29 22:34:10 -0700 | [diff] [blame] | 635 | #define XPC_DROPPED_NOTIFY_IRQ_WAIT_INTERVAL (0.25 * HZ) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 636 | |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 637 | /* number of seconds to wait for other partitions to disengage */ |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 638 | #define XPC_DISENGAGE_DEFAULT_TIMELIMIT 90 |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 639 | |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 640 | /* interval in seconds to print 'waiting deactivation' messages */ |
| 641 | #define XPC_DEACTIVATE_PRINTMSG_INTERVAL 10 |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 642 | |
Dean Nelson | 64d032b | 2008-05-12 14:02:03 -0700 | [diff] [blame] | 643 | #define XPC_PARTID(_p) ((short)((_p) - &xpc_partitions[0])) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 644 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 645 | /* found in xp_main.c */ |
| 646 | extern struct xpc_registration xpc_registrations[]; |
| 647 | |
Dean Nelson | e54af72 | 2005-10-25 14:07:43 -0500 | [diff] [blame] | 648 | /* found in xpc_main.c */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 649 | extern struct device *xpc_part; |
| 650 | extern struct device *xpc_chan; |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 651 | extern int xpc_disengage_timelimit; |
| 652 | extern int xpc_disengage_timedout; |
Dean Nelson | 6e41017 | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 653 | extern atomic_t xpc_activate_IRQ_rcvd; |
| 654 | extern wait_queue_head_t xpc_activate_IRQ_wq; |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 655 | extern void *xpc_heartbeating_to_mask; |
Dean Nelson | e54af72 | 2005-10-25 14:07:43 -0500 | [diff] [blame] | 656 | extern void xpc_activate_partition(struct xpc_partition *); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 657 | extern void xpc_activate_kthreads(struct xpc_channel *, int); |
Dean Nelson | a460ef8 | 2006-11-22 08:25:00 -0600 | [diff] [blame] | 658 | extern void xpc_create_kthreads(struct xpc_channel *, int, int); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 659 | extern void xpc_disconnect_wait(int); |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 660 | extern enum xp_retval (*xpc_rsvd_page_init) (struct xpc_rsvd_page *); |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 661 | extern void (*xpc_heartbeat_init) (void); |
| 662 | extern void (*xpc_heartbeat_exit) (void); |
| 663 | extern void (*xpc_increment_heartbeat) (void); |
| 664 | extern void (*xpc_offline_heartbeat) (void); |
| 665 | extern void (*xpc_online_heartbeat) (void); |
| 666 | extern void (*xpc_check_remote_hb) (void); |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 667 | extern enum xp_retval (*xpc_make_first_contact) (struct xpc_partition *); |
Dean Nelson | 7fb5e59 | 2008-07-29 22:34:10 -0700 | [diff] [blame] | 668 | extern u64 (*xpc_get_chctl_all_flags) (struct xpc_partition *); |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 669 | extern void (*xpc_notify_senders_of_disconnect) (struct xpc_channel *); |
Dean Nelson | 7fb5e59 | 2008-07-29 22:34:10 -0700 | [diff] [blame] | 670 | extern void (*xpc_process_msg_chctl_flags) (struct xpc_partition *, int); |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 671 | extern int (*xpc_n_of_deliverable_msgs) (struct xpc_channel *); |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 672 | extern struct xpc_msg *(*xpc_get_deliverable_msg) (struct xpc_channel *); |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 673 | extern void (*xpc_request_partition_activation) (struct xpc_rsvd_page *, u64, |
| 674 | int); |
| 675 | extern void (*xpc_request_partition_reactivation) (struct xpc_partition *); |
| 676 | extern void (*xpc_request_partition_deactivation) (struct xpc_partition *); |
| 677 | extern void (*xpc_cancel_partition_deactivation_request) ( |
| 678 | struct xpc_partition *); |
Dean Nelson | 6e41017 | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 679 | extern void (*xpc_process_activate_IRQ_rcvd) (int); |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 680 | extern enum xp_retval (*xpc_setup_infrastructure) (struct xpc_partition *); |
| 681 | extern void (*xpc_teardown_infrastructure) (struct xpc_partition *); |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 682 | |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 683 | extern void (*xpc_indicate_partition_engaged) (struct xpc_partition *); |
| 684 | extern int (*xpc_partition_engaged) (short); |
| 685 | extern int (*xpc_any_partition_engaged) (void); |
| 686 | extern void (*xpc_indicate_partition_disengaged) (struct xpc_partition *); |
| 687 | extern void (*xpc_assume_partition_disengaged) (short); |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 688 | |
Dean Nelson | 7fb5e59 | 2008-07-29 22:34:10 -0700 | [diff] [blame] | 689 | extern void (*xpc_send_chctl_closerequest) (struct xpc_channel *, |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 690 | unsigned long *); |
Dean Nelson | 7fb5e59 | 2008-07-29 22:34:10 -0700 | [diff] [blame] | 691 | extern void (*xpc_send_chctl_closereply) (struct xpc_channel *, |
| 692 | unsigned long *); |
| 693 | extern void (*xpc_send_chctl_openrequest) (struct xpc_channel *, |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 694 | unsigned long *); |
Dean Nelson | 7fb5e59 | 2008-07-29 22:34:10 -0700 | [diff] [blame] | 695 | extern void (*xpc_send_chctl_openreply) (struct xpc_channel *, unsigned long *); |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 696 | |
Dean Nelson | 97bf1aa | 2008-07-29 22:34:08 -0700 | [diff] [blame] | 697 | extern enum xp_retval (*xpc_send_msg) (struct xpc_channel *, u32, void *, u16, |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 698 | u8, xpc_notify_func, void *); |
| 699 | extern void (*xpc_received_msg) (struct xpc_channel *, struct xpc_msg *); |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 700 | |
| 701 | /* found in xpc_sn2.c */ |
Dean Nelson | 6e41017 | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 702 | extern int xpc_init_sn2(void); |
| 703 | extern void xpc_exit_sn2(void); |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 704 | |
| 705 | /* found in xpc_uv.c */ |
| 706 | extern void xpc_init_uv(void); |
Dean Nelson | 6e41017 | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 707 | extern void xpc_exit_uv(void); |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 708 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 709 | /* found in xpc_partition.c */ |
| 710 | extern int xpc_exiting; |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 711 | extern int xp_nasid_mask_words; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 712 | extern struct xpc_rsvd_page *xpc_rsvd_page; |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 713 | extern u64 *xpc_mach_nasids; |
Dean Nelson | bc63d38 | 2008-07-29 22:34:04 -0700 | [diff] [blame] | 714 | extern struct xpc_partition *xpc_partitions; |
Dean Nelson | 7682a4c | 2006-08-08 15:03:29 -0500 | [diff] [blame] | 715 | extern char *xpc_remote_copy_buffer; |
| 716 | extern void *xpc_remote_copy_buffer_base; |
| 717 | extern void *xpc_kmalloc_cacheline_aligned(size_t, gfp_t, void **); |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 718 | extern struct xpc_rsvd_page *xpc_setup_rsvd_page(void); |
Dean Nelson | 6e41017 | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 719 | extern int xpc_identify_activate_IRQ_sender(void); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 720 | extern int xpc_partition_disengaged(struct xpc_partition *); |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 721 | extern enum xp_retval xpc_mark_partition_active(struct xpc_partition *); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 722 | extern void xpc_mark_partition_inactive(struct xpc_partition *); |
| 723 | extern void xpc_discovery(void); |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 724 | extern enum xp_retval xpc_get_remote_rp(int, u64 *, struct xpc_rsvd_page *, |
| 725 | u64 *); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 726 | extern void xpc_deactivate_partition(const int, struct xpc_partition *, |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 727 | enum xp_retval); |
Dean Nelson | 64d032b | 2008-05-12 14:02:03 -0700 | [diff] [blame] | 728 | extern enum xp_retval xpc_initiate_partid_to_nasids(short, void *); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 729 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 730 | /* found in xpc_channel.c */ |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 731 | extern void *xpc_kzalloc_cacheline_aligned(size_t, gfp_t, void **); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 732 | extern void xpc_initiate_connect(int); |
| 733 | extern void xpc_initiate_disconnect(int); |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 734 | extern enum xp_retval xpc_allocate_msg_wait(struct xpc_channel *); |
Dean Nelson | 97bf1aa | 2008-07-29 22:34:08 -0700 | [diff] [blame] | 735 | extern enum xp_retval xpc_initiate_send(short, int, u32, void *, u16); |
| 736 | extern enum xp_retval xpc_initiate_send_notify(short, int, u32, void *, u16, |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 737 | xpc_notify_func, void *); |
Dean Nelson | 64d032b | 2008-05-12 14:02:03 -0700 | [diff] [blame] | 738 | extern void xpc_initiate_received(short, int, void *); |
Dean Nelson | 7fb5e59 | 2008-07-29 22:34:10 -0700 | [diff] [blame] | 739 | extern void xpc_process_sent_chctl_flags(struct xpc_partition *); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 740 | extern void xpc_connected_callout(struct xpc_channel *); |
| 741 | extern void xpc_deliver_msg(struct xpc_channel *); |
| 742 | extern void xpc_disconnect_channel(const int, struct xpc_channel *, |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 743 | enum xp_retval, unsigned long *); |
| 744 | extern void xpc_disconnect_callout(struct xpc_channel *, enum xp_retval); |
| 745 | extern void xpc_partition_going_down(struct xpc_partition *, enum xp_retval); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 746 | |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 747 | static inline int |
| 748 | xpc_hb_allowed(short partid, void *heartbeating_to_mask) |
| 749 | { |
| 750 | return test_bit(partid, heartbeating_to_mask); |
| 751 | } |
| 752 | |
| 753 | static inline int |
| 754 | xpc_any_hbs_allowed(void) |
| 755 | { |
| 756 | DBUG_ON(xpc_heartbeating_to_mask == NULL); |
| 757 | return !bitmap_empty(xpc_heartbeating_to_mask, xp_max_npartitions); |
| 758 | } |
| 759 | |
| 760 | static inline void |
| 761 | xpc_allow_hb(short partid) |
| 762 | { |
| 763 | DBUG_ON(xpc_heartbeating_to_mask == NULL); |
| 764 | set_bit(partid, xpc_heartbeating_to_mask); |
| 765 | } |
| 766 | |
| 767 | static inline void |
| 768 | xpc_disallow_hb(short partid) |
| 769 | { |
| 770 | DBUG_ON(xpc_heartbeating_to_mask == NULL); |
| 771 | clear_bit(partid, xpc_heartbeating_to_mask); |
| 772 | } |
| 773 | |
| 774 | static inline void |
| 775 | xpc_disallow_all_hbs(void) |
| 776 | { |
| 777 | DBUG_ON(xpc_heartbeating_to_mask == NULL); |
| 778 | bitmap_zero(xpc_heartbeating_to_mask, xp_max_npartitions); |
| 779 | } |
| 780 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 781 | static inline void |
| 782 | xpc_wakeup_channel_mgr(struct xpc_partition *part) |
| 783 | { |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 784 | if (atomic_inc_return(&part->channel_mgr_requests) == 1) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 785 | wake_up(&part->channel_mgr_wq); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 786 | } |
| 787 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 788 | /* |
| 789 | * These next two inlines are used to keep us from tearing down a channel's |
| 790 | * msg queues while a thread may be referencing them. |
| 791 | */ |
| 792 | static inline void |
| 793 | xpc_msgqueue_ref(struct xpc_channel *ch) |
| 794 | { |
| 795 | atomic_inc(&ch->references); |
| 796 | } |
| 797 | |
| 798 | static inline void |
| 799 | xpc_msgqueue_deref(struct xpc_channel *ch) |
| 800 | { |
| 801 | s32 refs = atomic_dec_return(&ch->references); |
| 802 | |
| 803 | DBUG_ON(refs < 0); |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 804 | if (refs == 0) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 805 | xpc_wakeup_channel_mgr(&xpc_partitions[ch->partid]); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 806 | } |
| 807 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 808 | #define XPC_DISCONNECT_CHANNEL(_ch, _reason, _irqflgs) \ |
| 809 | xpc_disconnect_channel(__LINE__, _ch, _reason, _irqflgs) |
| 810 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 811 | /* |
| 812 | * These two inlines are used to keep us from tearing down a partition's |
| 813 | * setup infrastructure while a thread may be referencing it. |
| 814 | */ |
| 815 | static inline void |
| 816 | xpc_part_deref(struct xpc_partition *part) |
| 817 | { |
| 818 | s32 refs = atomic_dec_return(&part->references); |
| 819 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 820 | DBUG_ON(refs < 0); |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 821 | if (refs == 0 && part->setup_state == XPC_P_WTEARDOWN) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 822 | wake_up(&part->teardown_wq); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 823 | } |
| 824 | |
| 825 | static inline int |
| 826 | xpc_part_ref(struct xpc_partition *part) |
| 827 | { |
| 828 | int setup; |
| 829 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 830 | atomic_inc(&part->references); |
| 831 | setup = (part->setup_state == XPC_P_SETUP); |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 832 | if (!setup) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 833 | xpc_part_deref(part); |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 834 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 835 | return setup; |
| 836 | } |
| 837 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 838 | /* |
| 839 | * The following macro is to be used for the setting of the reason and |
| 840 | * reason_line fields in both the struct xpc_channel and struct xpc_partition |
| 841 | * structures. |
| 842 | */ |
| 843 | #define XPC_SET_REASON(_p, _reason, _line) \ |
| 844 | { \ |
| 845 | (_p)->reason = _reason; \ |
| 846 | (_p)->reason_line = _line; \ |
| 847 | } |
| 848 | |
Dean Nelson | 45d9ca4 | 2008-04-22 14:46:56 -0500 | [diff] [blame] | 849 | #endif /* _DRIVERS_MISC_SGIXP_XPC_H */ |