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> |
| 23 | #include <asm/sn/bte.h> |
| 24 | #include <asm/sn/clksupport.h> |
| 25 | #include <asm/sn/addrs.h> |
| 26 | #include <asm/sn/mspec.h> |
| 27 | #include <asm/sn/shub_mmr.h> |
Dean Nelson | 45d9ca4 | 2008-04-22 14:46:56 -0500 | [diff] [blame] | 28 | #include "xp.h" |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 29 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 30 | /* |
| 31 | * XPC Version numbers consist of a major and minor number. XPC can always |
| 32 | * talk to versions with same major #, and never talk to versions with a |
| 33 | * different major #. |
| 34 | */ |
| 35 | #define _XPC_VERSION(_maj, _min) (((_maj) << 4) | ((_min) & 0xf)) |
| 36 | #define XPC_VERSION_MAJOR(_v) ((_v) >> 4) |
| 37 | #define XPC_VERSION_MINOR(_v) ((_v) & 0xf) |
| 38 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 39 | /* |
| 40 | * The next macros define word or bit representations for given |
| 41 | * C-brick nasid in either the SAL provided bit array representing |
| 42 | * nasids in the partition/machine or the AMO_t array used for |
| 43 | * inter-partition initiation communications. |
| 44 | * |
| 45 | * For SN2 machines, C-Bricks are alway even numbered NASIDs. As |
| 46 | * such, some space will be saved by insisting that nasid information |
| 47 | * passed from SAL always be packed for C-Bricks and the |
| 48 | * cross-partition interrupts use the same packing scheme. |
| 49 | */ |
| 50 | #define XPC_NASID_W_INDEX(_n) (((_n) / 64) / 2) |
| 51 | #define XPC_NASID_B_INDEX(_n) (((_n) / 2) & (64 - 1)) |
| 52 | #define XPC_NASID_IN_ARRAY(_n, _p) ((_p)[XPC_NASID_W_INDEX(_n)] & \ |
| 53 | (1UL << XPC_NASID_B_INDEX(_n))) |
| 54 | #define XPC_NASID_FROM_W_B(_w, _b) (((_w) * 64 + (_b)) * 2) |
| 55 | |
| 56 | #define XPC_HB_DEFAULT_INTERVAL 5 /* incr HB every x secs */ |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 57 | #define XPC_HB_CHECK_DEFAULT_INTERVAL 20 /* check HB every x secs */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 58 | |
| 59 | /* define the process name of HB checker and the CPU it is pinned to */ |
| 60 | #define XPC_HB_CHECK_THREAD_NAME "xpc_hb" |
| 61 | #define XPC_HB_CHECK_CPU 0 |
| 62 | |
| 63 | /* define the process name of the discovery thread */ |
| 64 | #define XPC_DISCOVERY_THREAD_NAME "xpc_discovery" |
| 65 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 66 | /* |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 67 | * the reserved page |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 68 | * |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 69 | * SAL reserves one page of memory per partition for XPC. Though a full page |
| 70 | * in length (16384 bytes), its starting address is not page aligned, but it |
| 71 | * is cacheline aligned. The reserved page consists of the following: |
| 72 | * |
| 73 | * reserved page header |
| 74 | * |
| 75 | * The first cacheline of the reserved page contains the header |
| 76 | * (struct xpc_rsvd_page). Before SAL initialization has completed, |
| 77 | * SAL has set up the following fields of the reserved page header: |
| 78 | * SAL_signature, SAL_version, partid, and nasids_size. The other |
| 79 | * fields are set up by XPC. (xpc_rsvd_page points to the local |
| 80 | * partition's reserved page.) |
| 81 | * |
| 82 | * part_nasids mask |
| 83 | * mach_nasids mask |
| 84 | * |
| 85 | * SAL also sets up two bitmaps (or masks), one that reflects the actual |
| 86 | * nasids in this partition (part_nasids), and the other that reflects |
| 87 | * the actual nasids in the entire machine (mach_nasids). We're only |
| 88 | * interested in the even numbered nasids (which contain the processors |
| 89 | * and/or memory), so we only need half as many bits to represent the |
| 90 | * nasids. The part_nasids mask is located starting at the first cacheline |
| 91 | * following the reserved page header. The mach_nasids mask follows right |
| 92 | * after the part_nasids mask. The size in bytes of each mask is reflected |
| 93 | * by the reserved page header field 'nasids_size'. (Local partition's |
| 94 | * mask pointers are xpc_part_nasids and xpc_mach_nasids.) |
| 95 | * |
| 96 | * vars |
| 97 | * vars part |
| 98 | * |
| 99 | * Immediately following the mach_nasids mask are the XPC variables |
| 100 | * required by other partitions. First are those that are generic to all |
| 101 | * partitions (vars), followed on the next available cacheline by those |
| 102 | * which are partition specific (vars part). These are setup by XPC. |
| 103 | * (Local partition's vars pointers are xpc_vars and xpc_vars_part.) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 104 | * |
| 105 | * Note: Until vars_pa is set, the partition XPC code has not been initialized. |
| 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 */ |
| 110 | u8 partid; /* SAL: partition ID */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 111 | u8 version; |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 112 | u8 pad1[6]; /* align to next u64 in cacheline */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 113 | u64 vars_pa; /* physical address of struct xpc_vars */ |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 114 | struct timespec stamp; /* time when reserved page was setup by XPC */ |
| 115 | u64 pad2[9]; /* align to last u64 in cacheline */ |
| 116 | u64 nasids_size; /* SAL: size of each nasid mask in bytes */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 117 | }; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 118 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 119 | #define XPC_RP_VERSION _XPC_VERSION(1, 1) /* version 1.1 of the reserved page */ |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 120 | |
| 121 | #define XPC_SUPPORTS_RP_STAMP(_version) \ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 122 | (_version >= _XPC_VERSION(1, 1)) |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 123 | |
| 124 | /* |
| 125 | * compare stamps - the return value is: |
| 126 | * |
| 127 | * < 0, if stamp1 < stamp2 |
| 128 | * = 0, if stamp1 == stamp2 |
| 129 | * > 0, if stamp1 > stamp2 |
| 130 | */ |
| 131 | static inline int |
| 132 | xpc_compare_stamps(struct timespec *stamp1, struct timespec *stamp2) |
| 133 | { |
| 134 | int ret; |
| 135 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 136 | ret = stamp1->tv_sec - stamp2->tv_sec; |
| 137 | if (ret == 0) |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 138 | ret = stamp1->tv_nsec - stamp2->tv_nsec; |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 139 | |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 140 | return ret; |
| 141 | } |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 142 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 143 | /* |
| 144 | * Define the structures by which XPC variables can be exported to other |
| 145 | * partitions. (There are two: struct xpc_vars and struct xpc_vars_part) |
| 146 | */ |
| 147 | |
| 148 | /* |
| 149 | * The following structure describes the partition generic variables |
| 150 | * needed by other partitions in order to properly initialize. |
| 151 | * |
| 152 | * struct xpc_vars version number also applies to struct xpc_vars_part. |
| 153 | * Changes to either structure and/or related functionality should be |
| 154 | * reflected by incrementing either the major or minor version numbers |
| 155 | * of struct xpc_vars. |
| 156 | */ |
| 157 | struct xpc_vars { |
| 158 | u8 version; |
| 159 | u64 heartbeat; |
| 160 | u64 heartbeating_to_mask; |
Dean Nelson | 780d09e | 2005-11-09 14:41:57 -0600 | [diff] [blame] | 161 | u64 heartbeat_offline; /* if 0, heartbeat should be changing */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 162 | int act_nasid; |
| 163 | int act_phys_cpuid; |
| 164 | u64 vars_part_pa; |
| 165 | u64 amos_page_pa; /* paddr of page of AMOs from MSPEC driver */ |
| 166 | AMO_t *amos_page; /* vaddr of page of AMOs from MSPEC driver */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 167 | }; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 168 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 169 | #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] | 170 | |
| 171 | #define XPC_SUPPORTS_DISENGAGE_REQUEST(_version) \ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 172 | (_version >= _XPC_VERSION(3, 1)) |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 173 | |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 174 | static inline int |
Dean Nelson | 64d032b | 2008-05-12 14:02:03 -0700 | [diff] [blame] | 175 | xpc_hb_allowed(short partid, struct xpc_vars *vars) |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 176 | { |
| 177 | return ((vars->heartbeating_to_mask & (1UL << partid)) != 0); |
| 178 | } |
| 179 | |
| 180 | static inline void |
Dean Nelson | 64d032b | 2008-05-12 14:02:03 -0700 | [diff] [blame] | 181 | xpc_allow_hb(short partid, struct xpc_vars *vars) |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 182 | { |
| 183 | u64 old_mask, new_mask; |
| 184 | |
| 185 | do { |
| 186 | old_mask = vars->heartbeating_to_mask; |
| 187 | new_mask = (old_mask | (1UL << partid)); |
| 188 | } while (cmpxchg(&vars->heartbeating_to_mask, old_mask, new_mask) != |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 189 | old_mask); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | static inline void |
Dean Nelson | 64d032b | 2008-05-12 14:02:03 -0700 | [diff] [blame] | 193 | xpc_disallow_hb(short partid, struct xpc_vars *vars) |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 194 | { |
| 195 | u64 old_mask, new_mask; |
| 196 | |
| 197 | do { |
| 198 | old_mask = vars->heartbeating_to_mask; |
| 199 | new_mask = (old_mask & ~(1UL << partid)); |
| 200 | } while (cmpxchg(&vars->heartbeating_to_mask, old_mask, new_mask) != |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 201 | old_mask); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 202 | } |
| 203 | |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 204 | /* |
| 205 | * The AMOs page consists of a number of AMO variables which are divided into |
| 206 | * four groups, The first two groups are used to identify an IRQ's sender. |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 207 | * These two groups consist of 64 and 128 AMO variables respectively. The last |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 208 | * two groups, consisting of just one AMO variable each, are used to identify |
| 209 | * the remote partitions that are currently engaged (from the viewpoint of |
| 210 | * the XPC running on the remote partition). |
| 211 | */ |
| 212 | #define XPC_NOTIFY_IRQ_AMOS 0 |
Dean Nelson | bc63d38 | 2008-07-29 22:34:04 -0700 | [diff] [blame^] | 213 | #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] | 214 | #define XPC_ENGAGED_PARTITIONS_AMO (XPC_ACTIVATE_IRQ_AMOS + XP_NASID_MASK_WORDS) |
| 215 | #define XPC_DISENGAGE_REQUEST_AMO (XPC_ENGAGED_PARTITIONS_AMO + 1) |
| 216 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 217 | /* |
| 218 | * The following structure describes the per partition specific variables. |
| 219 | * |
| 220 | * An array of these structures, one per partition, will be defined. As a |
| 221 | * partition becomes active XPC will copy the array entry corresponding to |
| 222 | * itself from that partition. It is desirable that the size of this |
| 223 | * structure evenly divide into a cacheline, such that none of the entries |
| 224 | * in this array crosses a cacheline boundary. As it is now, each entry |
| 225 | * occupies half a cacheline. |
| 226 | */ |
| 227 | struct xpc_vars_part { |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 228 | u64 magic; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 229 | |
| 230 | u64 openclose_args_pa; /* physical address of open and close args */ |
| 231 | u64 GPs_pa; /* physical address of Get/Put values */ |
| 232 | |
| 233 | u64 IPI_amo_pa; /* physical address of IPI AMO_t structure */ |
| 234 | int IPI_nasid; /* nasid of where to send IPIs */ |
| 235 | int IPI_phys_cpuid; /* physical CPU ID of where to send IPIs */ |
| 236 | |
| 237 | u8 nchannels; /* #of defined channels supported */ |
| 238 | |
| 239 | u8 reserved[23]; /* pad to a full 64 bytes */ |
| 240 | }; |
| 241 | |
| 242 | /* |
| 243 | * The vars_part MAGIC numbers play a part in the first contact protocol. |
| 244 | * |
| 245 | * MAGIC1 indicates that the per partition specific variables for a remote |
| 246 | * partition have been initialized by this partition. |
| 247 | * |
| 248 | * MAGIC2 indicates that this partition has pulled the remote partititions |
| 249 | * per partition variables that pertain to this partition. |
| 250 | */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 251 | #define XPC_VP_MAGIC1 0x0053524156435058L /* 'XPCVARS\0'L (little endian) */ |
| 252 | #define XPC_VP_MAGIC2 0x0073726176435058L /* 'XPCvars\0'L (little endian) */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 253 | |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 254 | /* the reserved page sizes and offsets */ |
| 255 | |
| 256 | #define XPC_RP_HEADER_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_rsvd_page)) |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 257 | #define XPC_RP_VARS_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_vars)) |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 258 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 259 | #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] | 260 | #define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + xp_nasid_mask_words) |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 261 | #define XPC_RP_VARS(_rp) ((struct xpc_vars *)(XPC_RP_MACH_NASIDS(_rp) + \ |
| 262 | xp_nasid_mask_words)) |
| 263 | #define XPC_RP_VARS_PART(_rp) ((struct xpc_vars_part *) \ |
| 264 | ((u8 *)XPC_RP_VARS(_rp) + XPC_RP_VARS_SIZE)) |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 265 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 266 | /* |
| 267 | * Functions registered by add_timer() or called by kernel_thread() only |
| 268 | * allow for a single 64-bit argument. The following macros can be used to |
| 269 | * pack and unpack two (32-bit, 16-bit or 8-bit) arguments into or out from |
| 270 | * the passed argument. |
| 271 | */ |
| 272 | #define XPC_PACK_ARGS(_arg1, _arg2) \ |
| 273 | ((((u64) _arg1) & 0xffffffff) | \ |
| 274 | ((((u64) _arg2) & 0xffffffff) << 32)) |
| 275 | |
| 276 | #define XPC_UNPACK_ARG1(_args) (((u64) _args) & 0xffffffff) |
| 277 | #define XPC_UNPACK_ARG2(_args) ((((u64) _args) >> 32) & 0xffffffff) |
| 278 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 279 | /* |
| 280 | * Define a Get/Put value pair (pointers) used with a message queue. |
| 281 | */ |
| 282 | struct xpc_gp { |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 283 | s64 get; /* Get value */ |
| 284 | s64 put; /* Put value */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 285 | }; |
| 286 | |
| 287 | #define XPC_GP_SIZE \ |
Dean Nelson | bc63d38 | 2008-07-29 22:34:04 -0700 | [diff] [blame^] | 288 | L1_CACHE_ALIGN(sizeof(struct xpc_gp) * XPC_MAX_NCHANNELS) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 289 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 290 | /* |
| 291 | * Define a structure that contains arguments associated with opening and |
| 292 | * closing a channel. |
| 293 | */ |
| 294 | struct xpc_openclose_args { |
| 295 | u16 reason; /* reason why channel is closing */ |
| 296 | u16 msg_size; /* sizeof each message entry */ |
| 297 | u16 remote_nentries; /* #of message entries in remote msg queue */ |
| 298 | u16 local_nentries; /* #of message entries in local msg queue */ |
| 299 | u64 local_msgqueue_pa; /* physical address of local message queue */ |
| 300 | }; |
| 301 | |
| 302 | #define XPC_OPENCLOSE_ARGS_SIZE \ |
Dean Nelson | bc63d38 | 2008-07-29 22:34:04 -0700 | [diff] [blame^] | 303 | L1_CACHE_ALIGN(sizeof(struct xpc_openclose_args) * \ |
| 304 | XPC_MAX_NCHANNELS) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 305 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 306 | /* struct xpc_msg flags */ |
| 307 | |
| 308 | #define XPC_M_DONE 0x01 /* msg has been received/consumed */ |
| 309 | #define XPC_M_READY 0x02 /* msg is ready to be sent */ |
| 310 | #define XPC_M_INTERRUPT 0x04 /* send interrupt when msg consumed */ |
| 311 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 312 | #define XPC_MSG_ADDRESS(_payload) \ |
| 313 | ((struct xpc_msg *)((u8 *)(_payload) - XPC_MSG_PAYLOAD_OFFSET)) |
| 314 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 315 | /* |
| 316 | * Defines notify entry. |
| 317 | * |
| 318 | * This is used to notify a message's sender that their message was received |
| 319 | * and consumed by the intended recipient. |
| 320 | */ |
| 321 | struct xpc_notify { |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 322 | u8 type; /* type of notification */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 323 | |
| 324 | /* the following two fields are only used if type == XPC_N_CALL */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 325 | xpc_notify_func func; /* user's notify function */ |
| 326 | void *key; /* pointer to user's key */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 327 | }; |
| 328 | |
| 329 | /* struct xpc_notify type of notification */ |
| 330 | |
| 331 | #define XPC_N_CALL 0x01 /* notify function provided by user */ |
| 332 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 333 | /* |
| 334 | * Define the structure that manages all the stuff required by a channel. In |
| 335 | * particular, they are used to manage the messages sent across the channel. |
| 336 | * |
| 337 | * This structure is private to a partition, and is NOT shared across the |
| 338 | * partition boundary. |
| 339 | * |
| 340 | * There is an array of these structures for each remote partition. It is |
| 341 | * allocated at the time a partition becomes active. The array contains one |
| 342 | * of these structures for each potential channel connection to that partition. |
| 343 | * |
| 344 | * Each of these structures manages two message queues (circular buffers). |
| 345 | * They are allocated at the time a channel connection is made. One of |
| 346 | * these message queues (local_msgqueue) holds the locally created messages |
| 347 | * that are destined for the remote partition. The other of these message |
| 348 | * queues (remote_msgqueue) is a locally cached copy of the remote partition's |
| 349 | * own local_msgqueue. |
| 350 | * |
| 351 | * The following is a description of the Get/Put pointers used to manage these |
| 352 | * two message queues. Consider the local_msgqueue to be on one partition |
| 353 | * and the remote_msgqueue to be its cached copy on another partition. A |
| 354 | * description of what each of the lettered areas contains is included. |
| 355 | * |
| 356 | * |
| 357 | * local_msgqueue remote_msgqueue |
| 358 | * |
| 359 | * |/////////| |/////////| |
| 360 | * w_remote_GP.get --> +---------+ |/////////| |
| 361 | * | F | |/////////| |
| 362 | * remote_GP.get --> +---------+ +---------+ <-- local_GP->get |
| 363 | * | | | | |
| 364 | * | | | E | |
| 365 | * | | | | |
| 366 | * | | +---------+ <-- w_local_GP.get |
| 367 | * | B | |/////////| |
| 368 | * | | |////D////| |
| 369 | * | | |/////////| |
| 370 | * | | +---------+ <-- w_remote_GP.put |
| 371 | * | | |////C////| |
| 372 | * local_GP->put --> +---------+ +---------+ <-- remote_GP.put |
| 373 | * | | |/////////| |
| 374 | * | A | |/////////| |
| 375 | * | | |/////////| |
| 376 | * w_local_GP.put --> +---------+ |/////////| |
| 377 | * |/////////| |/////////| |
| 378 | * |
| 379 | * |
| 380 | * ( remote_GP.[get|put] are cached copies of the remote |
| 381 | * partition's local_GP->[get|put], and thus their values can |
| 382 | * lag behind their counterparts on the remote partition. ) |
| 383 | * |
| 384 | * |
| 385 | * A - Messages that have been allocated, but have not yet been sent to the |
| 386 | * remote partition. |
| 387 | * |
| 388 | * B - Messages that have been sent, but have not yet been acknowledged by the |
| 389 | * remote partition as having been received. |
| 390 | * |
| 391 | * C - Area that needs to be prepared for the copying of sent messages, by |
| 392 | * the clearing of the message flags of any previously received messages. |
| 393 | * |
| 394 | * D - Area into which sent messages are to be copied from the remote |
| 395 | * partition's local_msgqueue and then delivered to their intended |
| 396 | * recipients. [ To allow for a multi-message copy, another pointer |
| 397 | * (next_msg_to_pull) has been added to keep track of the next message |
| 398 | * number needing to be copied (pulled). It chases after w_remote_GP.put. |
| 399 | * Any messages lying between w_local_GP.get and next_msg_to_pull have |
| 400 | * been copied and are ready to be delivered. ] |
| 401 | * |
| 402 | * E - Messages that have been copied and delivered, but have not yet been |
| 403 | * acknowledged by the recipient as having been received. |
| 404 | * |
| 405 | * F - Messages that have been acknowledged, but XPC has not yet notified the |
| 406 | * sender that the message was received by its intended recipient. |
| 407 | * This is also an area that needs to be prepared for the allocating of |
| 408 | * new messages, by the clearing of the message flags of the acknowledged |
| 409 | * messages. |
| 410 | */ |
| 411 | struct xpc_channel { |
Dean Nelson | 64d032b | 2008-05-12 14:02:03 -0700 | [diff] [blame] | 412 | short partid; /* ID of remote partition connected */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 413 | spinlock_t lock; /* lock for updating this structure */ |
| 414 | u32 flags; /* general flags */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 415 | |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 416 | enum xp_retval reason; /* reason why channel is disconnect'g */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 417 | int reason_line; /* line# disconnect initiated from */ |
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 | u16 number; /* channel # */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 420 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 421 | u16 msg_size; /* sizeof each msg entry */ |
| 422 | u16 local_nentries; /* #of msg entries in local msg queue */ |
| 423 | u16 remote_nentries; /* #of msg entries in remote msg queue */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 424 | |
| 425 | void *local_msgqueue_base; /* base address of kmalloc'd space */ |
| 426 | struct xpc_msg *local_msgqueue; /* local message queue */ |
| 427 | void *remote_msgqueue_base; /* base address of kmalloc'd space */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 428 | struct xpc_msg *remote_msgqueue; /* cached copy of remote partition's */ |
| 429 | /* local message queue */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 430 | u64 remote_msgqueue_pa; /* phys addr of remote partition's */ |
| 431 | /* local message queue */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 432 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 433 | atomic_t references; /* #of external references to queues */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 434 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 435 | atomic_t n_on_msg_allocate_wq; /* #on msg allocation wait queue */ |
| 436 | wait_queue_head_t msg_allocate_wq; /* msg allocation wait queue */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 437 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 438 | u8 delayed_IPI_flags; /* IPI flags received, but delayed */ |
| 439 | /* action until channel disconnected */ |
Dean Nelson | e54af72 | 2005-10-25 14:07:43 -0500 | [diff] [blame] | 440 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 441 | /* queue of msg senders who want to be notified when msg received */ |
| 442 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 443 | atomic_t n_to_notify; /* #of msg senders to notify */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 444 | struct xpc_notify *notify_queue; /* notify queue for messages sent */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 445 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 446 | xpc_channel_func func; /* user's channel function */ |
| 447 | void *key; /* pointer to user's key */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 448 | |
Jes Sorensen | f9e505a | 2006-01-17 12:52:21 -0500 | [diff] [blame] | 449 | struct mutex msg_to_pull_mutex; /* next msg to pull serialization */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 450 | struct completion wdisconnect_wait; /* wait for channel disconnect */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 451 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 452 | struct xpc_openclose_args *local_openclose_args; /* args passed on */ |
| 453 | /* opening or closing of channel */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 454 | |
| 455 | /* various flavors of local and remote Get/Put values */ |
| 456 | |
| 457 | struct xpc_gp *local_GP; /* local Get/Put values */ |
| 458 | struct xpc_gp remote_GP; /* remote Get/Put values */ |
| 459 | struct xpc_gp w_local_GP; /* working local Get/Put values */ |
| 460 | struct xpc_gp w_remote_GP; /* working remote Get/Put values */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 461 | s64 next_msg_to_pull; /* Put value of next msg to pull */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 462 | |
| 463 | /* kthread management related fields */ |
| 464 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 465 | atomic_t kthreads_assigned; /* #of kthreads assigned to channel */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 466 | u32 kthreads_assigned_limit; /* limit on #of kthreads assigned */ |
| 467 | atomic_t kthreads_idle; /* #of kthreads idle waiting for work */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 468 | u32 kthreads_idle_limit; /* limit on #of kthreads idle */ |
| 469 | atomic_t kthreads_active; /* #of kthreads actively working */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 470 | |
| 471 | wait_queue_head_t idle_wq; /* idle kthread wait queue */ |
| 472 | |
| 473 | } ____cacheline_aligned; |
| 474 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 475 | /* struct xpc_channel flags */ |
| 476 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 477 | #define XPC_C_WASCONNECTED 0x00000001 /* channel was connected */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 478 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 479 | #define XPC_C_ROPENREPLY 0x00000002 /* remote open channel reply */ |
| 480 | #define XPC_C_OPENREPLY 0x00000004 /* local open channel reply */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 481 | #define XPC_C_ROPENREQUEST 0x00000008 /* remote open channel request */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 482 | #define XPC_C_OPENREQUEST 0x00000010 /* local open channel request */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 483 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 484 | #define XPC_C_SETUP 0x00000020 /* channel's msgqueues are alloc'd */ |
| 485 | #define XPC_C_CONNECTEDCALLOUT 0x00000040 /* connected callout initiated */ |
Dean Nelson | 4c2cd96 | 2006-02-15 08:02:21 -0600 | [diff] [blame] | 486 | #define XPC_C_CONNECTEDCALLOUT_MADE \ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 487 | 0x00000080 /* connected callout completed */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 488 | #define XPC_C_CONNECTED 0x00000100 /* local channel is connected */ |
| 489 | #define XPC_C_CONNECTING 0x00000200 /* channel is being connected */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 490 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 491 | #define XPC_C_RCLOSEREPLY 0x00000400 /* remote close channel reply */ |
| 492 | #define XPC_C_CLOSEREPLY 0x00000800 /* local close channel reply */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 493 | #define XPC_C_RCLOSEREQUEST 0x00001000 /* remote close channel request */ |
| 494 | #define XPC_C_CLOSEREQUEST 0x00002000 /* local close channel request */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 495 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 496 | #define XPC_C_DISCONNECTED 0x00004000 /* channel is disconnected */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 497 | #define XPC_C_DISCONNECTING 0x00008000 /* channel is being disconnected */ |
Dean Nelson | 4c2cd96 | 2006-02-15 08:02:21 -0600 | [diff] [blame] | 498 | #define XPC_C_DISCONNECTINGCALLOUT \ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 499 | 0x00010000 /* disconnecting callout initiated */ |
Dean Nelson | 4c2cd96 | 2006-02-15 08:02:21 -0600 | [diff] [blame] | 500 | #define XPC_C_DISCONNECTINGCALLOUT_MADE \ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 501 | 0x00020000 /* disconnecting callout completed */ |
| 502 | #define XPC_C_WDISCONNECT 0x00040000 /* waiting for channel disconnect */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 503 | |
| 504 | /* |
| 505 | * Manages channels on a partition basis. There is one of these structures |
| 506 | * for each partition (a partition will never utilize the structure that |
| 507 | * represents itself). |
| 508 | */ |
| 509 | struct xpc_partition { |
| 510 | |
| 511 | /* XPC HB infrastructure */ |
| 512 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 513 | u8 remote_rp_version; /* version# of partition's rsvd pg */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 514 | struct timespec remote_rp_stamp; /* time when rsvd pg was initialized */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 515 | u64 remote_rp_pa; /* phys addr of partition's rsvd pg */ |
| 516 | u64 remote_vars_pa; /* phys addr of partition's vars */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 517 | u64 remote_vars_part_pa; /* phys addr of partition's vars part */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 518 | u64 last_heartbeat; /* HB at last read */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 519 | u64 remote_amos_page_pa; /* phys addr of partition's amos page */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 520 | int remote_act_nasid; /* active part's act/deact nasid */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 521 | int remote_act_phys_cpuid; /* active part's act/deact phys cpuid */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 522 | u32 act_IRQ_rcvd; /* IRQs since activation */ |
| 523 | spinlock_t act_lock; /* protect updating of act_state */ |
| 524 | u8 act_state; /* from XPC HB viewpoint */ |
| 525 | u8 remote_vars_version; /* version# of partition's vars */ |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 526 | enum xp_retval reason; /* reason partition is deactivating */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 527 | int reason_line; /* line# deactivation initiated from */ |
| 528 | int reactivate_nasid; /* nasid in partition to reactivate */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 529 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 530 | unsigned long disengage_request_timeout; /* timeout in jiffies */ |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 531 | struct timer_list disengage_request_timer; |
| 532 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 533 | /* XPC infrastructure referencing and teardown control */ |
| 534 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 535 | u8 setup_state; /* infrastructure setup state */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 536 | wait_queue_head_t teardown_wq; /* kthread waiting to teardown infra */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 537 | atomic_t references; /* #of references to infrastructure */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 538 | |
| 539 | /* |
| 540 | * NONE OF THE PRECEDING FIELDS OF THIS STRUCTURE WILL BE CLEARED WHEN |
| 541 | * XPC SETS UP THE NECESSARY INFRASTRUCTURE TO SUPPORT CROSS PARTITION |
| 542 | * COMMUNICATION. ALL OF THE FOLLOWING FIELDS WILL BE CLEARED. (THE |
| 543 | * 'nchannels' FIELD MUST BE THE FIRST OF THE FIELDS TO BE CLEARED.) |
| 544 | */ |
| 545 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 546 | u8 nchannels; /* #of defined channels supported */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 547 | atomic_t nchannels_active; /* #of channels that are not DISCONNECTED */ |
| 548 | atomic_t nchannels_engaged; /* #of channels engaged with remote part */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 549 | struct xpc_channel *channels; /* array of channel structures */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 550 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 551 | void *local_GPs_base; /* base address of kmalloc'd space */ |
| 552 | struct xpc_gp *local_GPs; /* local Get/Put values */ |
| 553 | void *remote_GPs_base; /* base address of kmalloc'd space */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 554 | struct xpc_gp *remote_GPs; /* copy of remote partition's local */ |
| 555 | /* Get/Put values */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 556 | u64 remote_GPs_pa; /* phys address of remote partition's local */ |
| 557 | /* Get/Put values */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 558 | |
| 559 | /* fields used to pass args when opening or closing a channel */ |
| 560 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 561 | void *local_openclose_args_base; /* base address of kmalloc'd space */ |
| 562 | struct xpc_openclose_args *local_openclose_args; /* local's args */ |
| 563 | void *remote_openclose_args_base; /* base address of kmalloc'd space */ |
| 564 | struct xpc_openclose_args *remote_openclose_args; /* copy of remote's */ |
| 565 | /* args */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 566 | u64 remote_openclose_args_pa; /* phys addr of remote's args */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 567 | |
| 568 | /* IPI sending, receiving and handling related fields */ |
| 569 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 570 | int remote_IPI_nasid; /* nasid of where to send IPIs */ |
| 571 | int remote_IPI_phys_cpuid; /* phys CPU ID of where to send IPIs */ |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 572 | AMO_t *remote_IPI_amo_va; /* address of remote IPI AMO_t structure */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 573 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 574 | AMO_t *local_IPI_amo_va; /* address of IPI AMO_t structure */ |
| 575 | u64 local_IPI_amo; /* IPI amo flags yet to be handled */ |
| 576 | char IPI_owner[8]; /* IPI owner's name */ |
| 577 | struct timer_list dropped_IPI_timer; /* dropped IPI timer */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 578 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 579 | spinlock_t IPI_lock; /* IPI handler lock */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 580 | |
| 581 | /* channel manager related fields */ |
| 582 | |
| 583 | atomic_t channel_mgr_requests; /* #of requests to activate chan mgr */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 584 | wait_queue_head_t channel_mgr_wq; /* channel mgr's wait queue */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 585 | |
| 586 | } ____cacheline_aligned; |
| 587 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 588 | /* struct xpc_partition act_state values (for XPC HB) */ |
| 589 | |
| 590 | #define XPC_P_INACTIVE 0x00 /* partition is not active */ |
| 591 | #define XPC_P_ACTIVATION_REQ 0x01 /* created thread to activate */ |
| 592 | #define XPC_P_ACTIVATING 0x02 /* activation thread started */ |
| 593 | #define XPC_P_ACTIVE 0x03 /* xpc_partition_up() was called */ |
| 594 | #define XPC_P_DEACTIVATING 0x04 /* partition deactivation initiated */ |
| 595 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 596 | #define XPC_DEACTIVATE_PARTITION(_p, _reason) \ |
| 597 | xpc_deactivate_partition(__LINE__, (_p), (_reason)) |
| 598 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 599 | /* struct xpc_partition setup_state values */ |
| 600 | |
| 601 | #define XPC_P_UNSET 0x00 /* infrastructure was never setup */ |
| 602 | #define XPC_P_SETUP 0x01 /* infrastructure is setup */ |
| 603 | #define XPC_P_WTEARDOWN 0x02 /* waiting to teardown infrastructure */ |
| 604 | #define XPC_P_TORNDOWN 0x03 /* infrastructure is torndown */ |
| 605 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 606 | /* |
| 607 | * struct xpc_partition IPI_timer #of seconds to wait before checking for |
| 608 | * dropped IPIs. These occur whenever an IPI amo write doesn't complete until |
| 609 | * after the IPI was received. |
| 610 | */ |
| 611 | #define XPC_P_DROPPED_IPI_WAIT (0.25 * HZ) |
| 612 | |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 613 | /* number of seconds to wait for other partitions to disengage */ |
Dean Nelson | e54af72 | 2005-10-25 14:07:43 -0500 | [diff] [blame] | 614 | #define XPC_DISENGAGE_REQUEST_DEFAULT_TIMELIMIT 90 |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 615 | |
| 616 | /* interval in seconds to print 'waiting disengagement' messages */ |
| 617 | #define XPC_DISENGAGE_PRINTMSG_INTERVAL 10 |
| 618 | |
Dean Nelson | 64d032b | 2008-05-12 14:02:03 -0700 | [diff] [blame] | 619 | #define XPC_PARTID(_p) ((short)((_p) - &xpc_partitions[0])) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 620 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 621 | /* found in xp_main.c */ |
| 622 | extern struct xpc_registration xpc_registrations[]; |
| 623 | |
Dean Nelson | e54af72 | 2005-10-25 14:07:43 -0500 | [diff] [blame] | 624 | /* found in xpc_main.c */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 625 | extern struct device *xpc_part; |
| 626 | extern struct device *xpc_chan; |
Dean Nelson | e54af72 | 2005-10-25 14:07:43 -0500 | [diff] [blame] | 627 | extern int xpc_disengage_request_timelimit; |
Dean Nelson | 1ecaded | 2006-01-06 09:48:21 -0600 | [diff] [blame] | 628 | extern int xpc_disengage_request_timedout; |
Al Viro | 5dcded1 | 2006-10-08 14:59:19 +0100 | [diff] [blame] | 629 | extern irqreturn_t xpc_notify_IRQ_handler(int, void *); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 630 | extern void xpc_dropped_IPI_check(struct xpc_partition *); |
Dean Nelson | e54af72 | 2005-10-25 14:07:43 -0500 | [diff] [blame] | 631 | extern void xpc_activate_partition(struct xpc_partition *); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 632 | extern void xpc_activate_kthreads(struct xpc_channel *, int); |
Dean Nelson | a460ef8 | 2006-11-22 08:25:00 -0600 | [diff] [blame] | 633 | extern void xpc_create_kthreads(struct xpc_channel *, int, int); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 634 | extern void xpc_disconnect_wait(int); |
| 635 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 636 | /* found in xpc_partition.c */ |
| 637 | extern int xpc_exiting; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 638 | extern struct xpc_vars *xpc_vars; |
| 639 | extern struct xpc_rsvd_page *xpc_rsvd_page; |
| 640 | extern struct xpc_vars_part *xpc_vars_part; |
Dean Nelson | bc63d38 | 2008-07-29 22:34:04 -0700 | [diff] [blame^] | 641 | extern struct xpc_partition *xpc_partitions; |
Dean Nelson | 7682a4c | 2006-08-08 15:03:29 -0500 | [diff] [blame] | 642 | extern char *xpc_remote_copy_buffer; |
| 643 | extern void *xpc_remote_copy_buffer_base; |
| 644 | extern void *xpc_kmalloc_cacheline_aligned(size_t, gfp_t, void **); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 645 | extern struct xpc_rsvd_page *xpc_rsvd_page_init(void); |
| 646 | extern void xpc_allow_IPI_ops(void); |
| 647 | extern void xpc_restrict_IPI_ops(void); |
| 648 | extern int xpc_identify_act_IRQ_sender(void); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 649 | extern int xpc_partition_disengaged(struct xpc_partition *); |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 650 | extern enum xp_retval xpc_mark_partition_active(struct xpc_partition *); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 651 | extern void xpc_mark_partition_inactive(struct xpc_partition *); |
| 652 | extern void xpc_discovery(void); |
| 653 | extern void xpc_check_remote_hb(void); |
| 654 | extern void xpc_deactivate_partition(const int, struct xpc_partition *, |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 655 | enum xp_retval); |
Dean Nelson | 64d032b | 2008-05-12 14:02:03 -0700 | [diff] [blame] | 656 | extern enum xp_retval xpc_initiate_partid_to_nasids(short, void *); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 657 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 658 | /* found in xpc_channel.c */ |
| 659 | extern void xpc_initiate_connect(int); |
| 660 | extern void xpc_initiate_disconnect(int); |
Dean Nelson | 64d032b | 2008-05-12 14:02:03 -0700 | [diff] [blame] | 661 | extern enum xp_retval xpc_initiate_allocate(short, int, u32, void **); |
| 662 | extern enum xp_retval xpc_initiate_send(short, int, void *); |
| 663 | extern enum xp_retval xpc_initiate_send_notify(short, int, void *, |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 664 | xpc_notify_func, void *); |
Dean Nelson | 64d032b | 2008-05-12 14:02:03 -0700 | [diff] [blame] | 665 | extern void xpc_initiate_received(short, int, void *); |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 666 | extern enum xp_retval xpc_setup_infrastructure(struct xpc_partition *); |
| 667 | extern enum xp_retval xpc_pull_remote_vars_part(struct xpc_partition *); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 668 | extern void xpc_process_channel_activity(struct xpc_partition *); |
| 669 | extern void xpc_connected_callout(struct xpc_channel *); |
| 670 | extern void xpc_deliver_msg(struct xpc_channel *); |
| 671 | extern void xpc_disconnect_channel(const int, struct xpc_channel *, |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 672 | enum xp_retval, unsigned long *); |
| 673 | extern void xpc_disconnect_callout(struct xpc_channel *, enum xp_retval); |
| 674 | extern void xpc_partition_going_down(struct xpc_partition *, enum xp_retval); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 675 | extern void xpc_teardown_infrastructure(struct xpc_partition *); |
| 676 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 677 | static inline void |
| 678 | xpc_wakeup_channel_mgr(struct xpc_partition *part) |
| 679 | { |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 680 | if (atomic_inc_return(&part->channel_mgr_requests) == 1) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 681 | wake_up(&part->channel_mgr_wq); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 682 | } |
| 683 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 684 | /* |
| 685 | * These next two inlines are used to keep us from tearing down a channel's |
| 686 | * msg queues while a thread may be referencing them. |
| 687 | */ |
| 688 | static inline void |
| 689 | xpc_msgqueue_ref(struct xpc_channel *ch) |
| 690 | { |
| 691 | atomic_inc(&ch->references); |
| 692 | } |
| 693 | |
| 694 | static inline void |
| 695 | xpc_msgqueue_deref(struct xpc_channel *ch) |
| 696 | { |
| 697 | s32 refs = atomic_dec_return(&ch->references); |
| 698 | |
| 699 | DBUG_ON(refs < 0); |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 700 | if (refs == 0) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 701 | xpc_wakeup_channel_mgr(&xpc_partitions[ch->partid]); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 702 | } |
| 703 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 704 | #define XPC_DISCONNECT_CHANNEL(_ch, _reason, _irqflgs) \ |
| 705 | xpc_disconnect_channel(__LINE__, _ch, _reason, _irqflgs) |
| 706 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 707 | /* |
| 708 | * These two inlines are used to keep us from tearing down a partition's |
| 709 | * setup infrastructure while a thread may be referencing it. |
| 710 | */ |
| 711 | static inline void |
| 712 | xpc_part_deref(struct xpc_partition *part) |
| 713 | { |
| 714 | s32 refs = atomic_dec_return(&part->references); |
| 715 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 716 | DBUG_ON(refs < 0); |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 717 | if (refs == 0 && part->setup_state == XPC_P_WTEARDOWN) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 718 | wake_up(&part->teardown_wq); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 719 | } |
| 720 | |
| 721 | static inline int |
| 722 | xpc_part_ref(struct xpc_partition *part) |
| 723 | { |
| 724 | int setup; |
| 725 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 726 | atomic_inc(&part->references); |
| 727 | setup = (part->setup_state == XPC_P_SETUP); |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 728 | if (!setup) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 729 | xpc_part_deref(part); |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 730 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 731 | return setup; |
| 732 | } |
| 733 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 734 | /* |
| 735 | * The following macro is to be used for the setting of the reason and |
| 736 | * reason_line fields in both the struct xpc_channel and struct xpc_partition |
| 737 | * structures. |
| 738 | */ |
| 739 | #define XPC_SET_REASON(_p, _reason, _line) \ |
| 740 | { \ |
| 741 | (_p)->reason = _reason; \ |
| 742 | (_p)->reason_line = _line; \ |
| 743 | } |
| 744 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 745 | /* |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 746 | * This next set of inlines are used to keep track of when a partition is |
| 747 | * potentially engaged in accessing memory belonging to another partition. |
| 748 | */ |
| 749 | |
| 750 | static inline void |
| 751 | xpc_mark_partition_engaged(struct xpc_partition *part) |
| 752 | { |
| 753 | unsigned long irq_flags; |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 754 | AMO_t *amo = (AMO_t *)__va(part->remote_amos_page_pa + |
| 755 | (XPC_ENGAGED_PARTITIONS_AMO * |
| 756 | sizeof(AMO_t))); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 757 | |
| 758 | local_irq_save(irq_flags); |
| 759 | |
| 760 | /* set bit corresponding to our partid in remote partition's AMO */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 761 | FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR, |
| 762 | (1UL << sn_partition_id)); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 763 | /* |
| 764 | * We must always use the nofault function regardless of whether we |
| 765 | * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we |
| 766 | * didn't, we'd never know that the other partition is down and would |
| 767 | * keep sending IPIs and AMOs to it until the heartbeat times out. |
| 768 | */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 769 | (void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo-> |
| 770 | variable), |
| 771 | xp_nofault_PIOR_target)); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 772 | |
| 773 | local_irq_restore(irq_flags); |
| 774 | } |
| 775 | |
| 776 | static inline void |
| 777 | xpc_mark_partition_disengaged(struct xpc_partition *part) |
| 778 | { |
| 779 | unsigned long irq_flags; |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 780 | AMO_t *amo = (AMO_t *)__va(part->remote_amos_page_pa + |
| 781 | (XPC_ENGAGED_PARTITIONS_AMO * |
| 782 | sizeof(AMO_t))); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 783 | |
| 784 | local_irq_save(irq_flags); |
| 785 | |
| 786 | /* clear bit corresponding to our partid in remote partition's AMO */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 787 | FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND, |
| 788 | ~(1UL << sn_partition_id)); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 789 | /* |
| 790 | * We must always use the nofault function regardless of whether we |
| 791 | * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we |
| 792 | * didn't, we'd never know that the other partition is down and would |
| 793 | * keep sending IPIs and AMOs to it until the heartbeat times out. |
| 794 | */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 795 | (void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo-> |
| 796 | variable), |
| 797 | xp_nofault_PIOR_target)); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 798 | |
| 799 | local_irq_restore(irq_flags); |
| 800 | } |
| 801 | |
| 802 | static inline void |
| 803 | xpc_request_partition_disengage(struct xpc_partition *part) |
| 804 | { |
| 805 | unsigned long irq_flags; |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 806 | AMO_t *amo = (AMO_t *)__va(part->remote_amos_page_pa + |
| 807 | (XPC_DISENGAGE_REQUEST_AMO * sizeof(AMO_t))); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 808 | |
| 809 | local_irq_save(irq_flags); |
| 810 | |
| 811 | /* set bit corresponding to our partid in remote partition's AMO */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 812 | FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR, |
| 813 | (1UL << sn_partition_id)); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 814 | /* |
| 815 | * We must always use the nofault function regardless of whether we |
| 816 | * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we |
| 817 | * didn't, we'd never know that the other partition is down and would |
| 818 | * keep sending IPIs and AMOs to it until the heartbeat times out. |
| 819 | */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 820 | (void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo-> |
| 821 | variable), |
| 822 | xp_nofault_PIOR_target)); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 823 | |
| 824 | local_irq_restore(irq_flags); |
| 825 | } |
| 826 | |
| 827 | static inline void |
| 828 | xpc_cancel_partition_disengage_request(struct xpc_partition *part) |
| 829 | { |
| 830 | unsigned long irq_flags; |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 831 | AMO_t *amo = (AMO_t *)__va(part->remote_amos_page_pa + |
| 832 | (XPC_DISENGAGE_REQUEST_AMO * sizeof(AMO_t))); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 833 | |
| 834 | local_irq_save(irq_flags); |
| 835 | |
| 836 | /* clear bit corresponding to our partid in remote partition's AMO */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 837 | FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND, |
| 838 | ~(1UL << sn_partition_id)); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 839 | /* |
| 840 | * We must always use the nofault function regardless of whether we |
| 841 | * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we |
| 842 | * didn't, we'd never know that the other partition is down and would |
| 843 | * keep sending IPIs and AMOs to it until the heartbeat times out. |
| 844 | */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 845 | (void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo-> |
| 846 | variable), |
| 847 | xp_nofault_PIOR_target)); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 848 | |
| 849 | local_irq_restore(irq_flags); |
| 850 | } |
| 851 | |
| 852 | static inline u64 |
| 853 | xpc_partition_engaged(u64 partid_mask) |
| 854 | { |
| 855 | AMO_t *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO; |
| 856 | |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 857 | /* return our partition's AMO variable ANDed with partid_mask */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 858 | return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) & |
| 859 | partid_mask); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 860 | } |
| 861 | |
| 862 | static inline u64 |
| 863 | xpc_partition_disengage_requested(u64 partid_mask) |
| 864 | { |
| 865 | AMO_t *amo = xpc_vars->amos_page + XPC_DISENGAGE_REQUEST_AMO; |
| 866 | |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 867 | /* return our partition's AMO variable ANDed with partid_mask */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 868 | return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) & |
| 869 | partid_mask); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 870 | } |
| 871 | |
| 872 | static inline void |
| 873 | xpc_clear_partition_engaged(u64 partid_mask) |
| 874 | { |
| 875 | AMO_t *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO; |
| 876 | |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 877 | /* clear bit(s) based on partid_mask in our partition's AMO */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 878 | FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND, |
| 879 | ~partid_mask); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 880 | } |
| 881 | |
| 882 | static inline void |
| 883 | xpc_clear_partition_disengage_request(u64 partid_mask) |
| 884 | { |
| 885 | AMO_t *amo = xpc_vars->amos_page + XPC_DISENGAGE_REQUEST_AMO; |
| 886 | |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 887 | /* clear bit(s) based on partid_mask in our partition's AMO */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 888 | FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND, |
| 889 | ~partid_mask); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 890 | } |
| 891 | |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 892 | /* |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 893 | * The following set of macros and inlines are used for the sending and |
| 894 | * receiving of IPIs (also known as IRQs). There are two flavors of IPIs, |
| 895 | * one that is associated with partition activity (SGI_XPC_ACTIVATE) and |
| 896 | * the other that is associated with channel activity (SGI_XPC_NOTIFY). |
| 897 | */ |
| 898 | |
| 899 | static inline u64 |
| 900 | xpc_IPI_receive(AMO_t *amo) |
| 901 | { |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 902 | return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_CLEAR); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 903 | } |
| 904 | |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 905 | static inline enum xp_retval |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 906 | xpc_IPI_send(AMO_t *amo, u64 flag, int nasid, int phys_cpuid, int vector) |
| 907 | { |
| 908 | int ret = 0; |
| 909 | unsigned long irq_flags; |
| 910 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 911 | local_irq_save(irq_flags); |
| 912 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 913 | FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR, flag); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 914 | sn_send_IPI_phys(nasid, phys_cpuid, vector, 0); |
| 915 | |
| 916 | /* |
| 917 | * We must always use the nofault function regardless of whether we |
| 918 | * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we |
| 919 | * didn't, we'd never know that the other partition is down and would |
| 920 | * keep sending IPIs and AMOs to it until the heartbeat times out. |
| 921 | */ |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 922 | ret = xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->variable), |
| 923 | xp_nofault_PIOR_target)); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 924 | |
| 925 | local_irq_restore(irq_flags); |
| 926 | |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 927 | return ((ret == 0) ? xpSuccess : xpPioReadError); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 928 | } |
| 929 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 930 | /* |
| 931 | * IPIs associated with SGI_XPC_ACTIVATE IRQ. |
| 932 | */ |
| 933 | |
| 934 | /* |
| 935 | * Flag the appropriate AMO variable and send an IPI to the specified node. |
| 936 | */ |
| 937 | static inline void |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 938 | xpc_activate_IRQ_send(u64 amos_page_pa, int from_nasid, int to_nasid, |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 939 | int to_phys_cpuid) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 940 | { |
| 941 | int w_index = XPC_NASID_W_INDEX(from_nasid); |
| 942 | int b_index = XPC_NASID_B_INDEX(from_nasid); |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 943 | AMO_t *amos = (AMO_t *)__va(amos_page_pa + |
| 944 | (XPC_ACTIVATE_IRQ_AMOS * sizeof(AMO_t))); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 945 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 946 | (void)xpc_IPI_send(&amos[w_index], (1UL << b_index), to_nasid, |
| 947 | to_phys_cpuid, SGI_XPC_ACTIVATE); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 948 | } |
| 949 | |
| 950 | static inline void |
| 951 | xpc_IPI_send_activate(struct xpc_vars *vars) |
| 952 | { |
| 953 | xpc_activate_IRQ_send(vars->amos_page_pa, cnodeid_to_nasid(0), |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 954 | vars->act_nasid, vars->act_phys_cpuid); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 955 | } |
| 956 | |
| 957 | static inline void |
| 958 | xpc_IPI_send_activated(struct xpc_partition *part) |
| 959 | { |
| 960 | xpc_activate_IRQ_send(part->remote_amos_page_pa, cnodeid_to_nasid(0), |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 961 | part->remote_act_nasid, |
| 962 | part->remote_act_phys_cpuid); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 963 | } |
| 964 | |
| 965 | static inline void |
| 966 | xpc_IPI_send_reactivate(struct xpc_partition *part) |
| 967 | { |
| 968 | xpc_activate_IRQ_send(xpc_vars->amos_page_pa, part->reactivate_nasid, |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 969 | xpc_vars->act_nasid, xpc_vars->act_phys_cpuid); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 970 | } |
| 971 | |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 972 | static inline void |
| 973 | xpc_IPI_send_disengage(struct xpc_partition *part) |
| 974 | { |
| 975 | xpc_activate_IRQ_send(part->remote_amos_page_pa, cnodeid_to_nasid(0), |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 976 | part->remote_act_nasid, |
| 977 | part->remote_act_phys_cpuid); |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 978 | } |
| 979 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 980 | /* |
| 981 | * IPIs associated with SGI_XPC_NOTIFY IRQ. |
| 982 | */ |
| 983 | |
| 984 | /* |
| 985 | * Send an IPI to the remote partition that is associated with the |
| 986 | * specified channel. |
| 987 | */ |
| 988 | #define XPC_NOTIFY_IRQ_SEND(_ch, _ipi_f, _irq_f) \ |
| 989 | xpc_notify_IRQ_send(_ch, _ipi_f, #_ipi_f, _irq_f) |
| 990 | |
| 991 | static inline void |
| 992 | xpc_notify_IRQ_send(struct xpc_channel *ch, u8 ipi_flag, char *ipi_flag_string, |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 993 | unsigned long *irq_flags) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 994 | { |
| 995 | struct xpc_partition *part = &xpc_partitions[ch->partid]; |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 996 | enum xp_retval ret; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 997 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 998 | if (likely(part->act_state != XPC_P_DEACTIVATING)) { |
| 999 | ret = xpc_IPI_send(part->remote_IPI_amo_va, |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 1000 | (u64)ipi_flag << (ch->number * 8), |
| 1001 | part->remote_IPI_nasid, |
| 1002 | part->remote_IPI_phys_cpuid, SGI_XPC_NOTIFY); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1003 | dev_dbg(xpc_chan, "%s sent to partid=%d, channel=%d, ret=%d\n", |
| 1004 | ipi_flag_string, ch->partid, ch->number, ret); |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 1005 | if (unlikely(ret != xpSuccess)) { |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 1006 | if (irq_flags != NULL) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1007 | spin_unlock_irqrestore(&ch->lock, *irq_flags); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1008 | XPC_DEACTIVATE_PARTITION(part, ret); |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 1009 | if (irq_flags != NULL) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1010 | spin_lock_irqsave(&ch->lock, *irq_flags); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1011 | } |
| 1012 | } |
| 1013 | } |
| 1014 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1015 | /* |
| 1016 | * Make it look like the remote partition, which is associated with the |
| 1017 | * specified channel, sent us an IPI. This faked IPI will be handled |
| 1018 | * by xpc_dropped_IPI_check(). |
| 1019 | */ |
| 1020 | #define XPC_NOTIFY_IRQ_SEND_LOCAL(_ch, _ipi_f) \ |
| 1021 | xpc_notify_IRQ_send_local(_ch, _ipi_f, #_ipi_f) |
| 1022 | |
| 1023 | static inline void |
| 1024 | xpc_notify_IRQ_send_local(struct xpc_channel *ch, u8 ipi_flag, |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 1025 | char *ipi_flag_string) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1026 | { |
| 1027 | struct xpc_partition *part = &xpc_partitions[ch->partid]; |
| 1028 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 1029 | FETCHOP_STORE_OP(TO_AMO((u64)&part->local_IPI_amo_va->variable), |
| 1030 | FETCHOP_OR, ((u64)ipi_flag << (ch->number * 8))); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1031 | dev_dbg(xpc_chan, "%s sent local from partid=%d, channel=%d\n", |
| 1032 | ipi_flag_string, ch->partid, ch->number); |
| 1033 | } |
| 1034 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1035 | /* |
| 1036 | * The sending and receiving of IPIs includes the setting of an AMO variable |
| 1037 | * to indicate the reason the IPI was sent. The 64-bit variable is divided |
| 1038 | * up into eight bytes, ordered from right to left. Byte zero pertains to |
| 1039 | * channel 0, byte one to channel 1, and so on. Each byte is described by |
| 1040 | * the following IPI flags. |
| 1041 | */ |
| 1042 | |
| 1043 | #define XPC_IPI_CLOSEREQUEST 0x01 |
| 1044 | #define XPC_IPI_CLOSEREPLY 0x02 |
| 1045 | #define XPC_IPI_OPENREQUEST 0x04 |
| 1046 | #define XPC_IPI_OPENREPLY 0x08 |
| 1047 | #define XPC_IPI_MSGREQUEST 0x10 |
| 1048 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1049 | /* given an AMO variable and a channel#, get its associated IPI flags */ |
| 1050 | #define XPC_GET_IPI_FLAGS(_amo, _c) ((u8) (((_amo) >> ((_c) * 8)) & 0xff)) |
Dean Nelson | e54af72 | 2005-10-25 14:07:43 -0500 | [diff] [blame] | 1051 | #define XPC_SET_IPI_FLAGS(_amo, _c, _f) (_amo) |= ((u64) (_f) << ((_c) * 8)) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1052 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 1053 | #define XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(_amo) ((_amo) & 0x0f0f0f0f0f0f0f0fUL) |
| 1054 | #define XPC_ANY_MSG_IPI_FLAGS_SET(_amo) ((_amo) & 0x1010101010101010UL) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1055 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1056 | static inline void |
| 1057 | xpc_IPI_send_closerequest(struct xpc_channel *ch, unsigned long *irq_flags) |
| 1058 | { |
| 1059 | struct xpc_openclose_args *args = ch->local_openclose_args; |
| 1060 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1061 | args->reason = ch->reason; |
| 1062 | |
| 1063 | XPC_NOTIFY_IRQ_SEND(ch, XPC_IPI_CLOSEREQUEST, irq_flags); |
| 1064 | } |
| 1065 | |
| 1066 | static inline void |
| 1067 | xpc_IPI_send_closereply(struct xpc_channel *ch, unsigned long *irq_flags) |
| 1068 | { |
| 1069 | XPC_NOTIFY_IRQ_SEND(ch, XPC_IPI_CLOSEREPLY, irq_flags); |
| 1070 | } |
| 1071 | |
| 1072 | static inline void |
| 1073 | xpc_IPI_send_openrequest(struct xpc_channel *ch, unsigned long *irq_flags) |
| 1074 | { |
| 1075 | struct xpc_openclose_args *args = ch->local_openclose_args; |
| 1076 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1077 | args->msg_size = ch->msg_size; |
| 1078 | args->local_nentries = ch->local_nentries; |
| 1079 | |
| 1080 | XPC_NOTIFY_IRQ_SEND(ch, XPC_IPI_OPENREQUEST, irq_flags); |
| 1081 | } |
| 1082 | |
| 1083 | static inline void |
| 1084 | xpc_IPI_send_openreply(struct xpc_channel *ch, unsigned long *irq_flags) |
| 1085 | { |
| 1086 | struct xpc_openclose_args *args = ch->local_openclose_args; |
| 1087 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1088 | args->remote_nentries = ch->remote_nentries; |
| 1089 | args->local_nentries = ch->local_nentries; |
| 1090 | args->local_msgqueue_pa = __pa(ch->local_msgqueue); |
| 1091 | |
| 1092 | XPC_NOTIFY_IRQ_SEND(ch, XPC_IPI_OPENREPLY, irq_flags); |
| 1093 | } |
| 1094 | |
| 1095 | static inline void |
| 1096 | xpc_IPI_send_msgrequest(struct xpc_channel *ch) |
| 1097 | { |
| 1098 | XPC_NOTIFY_IRQ_SEND(ch, XPC_IPI_MSGREQUEST, NULL); |
| 1099 | } |
| 1100 | |
| 1101 | static inline void |
| 1102 | xpc_IPI_send_local_msgrequest(struct xpc_channel *ch) |
| 1103 | { |
| 1104 | XPC_NOTIFY_IRQ_SEND_LOCAL(ch, XPC_IPI_MSGREQUEST); |
| 1105 | } |
| 1106 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1107 | /* |
Dean Nelson | bc63d38 | 2008-07-29 22:34:04 -0700 | [diff] [blame^] | 1108 | >>> this block comment needs to be moved and re-written. |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1109 | * Memory for XPC's AMO variables is allocated by the MSPEC driver. These |
| 1110 | * pages are located in the lowest granule. The lowest granule uses 4k pages |
| 1111 | * for cached references and an alternate TLB handler to never provide a |
| 1112 | * cacheable mapping for the entire region. This will prevent speculative |
| 1113 | * reading of cached copies of our lines from being issued which will cause |
| 1114 | * a PI FSB Protocol error to be generated by the SHUB. For XPC, we need 64 |
Dean Nelson | bc63d38 | 2008-07-29 22:34:04 -0700 | [diff] [blame^] | 1115 | * AMO variables (based on xp_max_npartitions) for message notification and an |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 1116 | * additional 128 AMO variables (based on XP_NASID_MASK_WORDS) for partition |
| 1117 | * activation and 2 AMO variables for partition deactivation. |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1118 | */ |
| 1119 | static inline AMO_t * |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 1120 | xpc_IPI_init(int index) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1121 | { |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 1122 | AMO_t *amo = xpc_vars->amos_page + index; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1123 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 1124 | (void)xpc_IPI_receive(amo); /* clear AMO variable */ |
Dean Nelson | a607c389 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 1125 | return amo; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1126 | } |
| 1127 | |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 1128 | static inline enum xp_retval |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1129 | xpc_map_bte_errors(bte_result_t error) |
| 1130 | { |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 1131 | return ((error == BTE_SUCCESS) ? xpSuccess : xpBteCopyError); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1132 | } |
| 1133 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1134 | /* |
| 1135 | * Check to see if there is any channel activity to/from the specified |
| 1136 | * partition. |
| 1137 | */ |
| 1138 | static inline void |
| 1139 | xpc_check_for_channel_activity(struct xpc_partition *part) |
| 1140 | { |
| 1141 | u64 IPI_amo; |
| 1142 | unsigned long irq_flags; |
| 1143 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1144 | IPI_amo = xpc_IPI_receive(part->local_IPI_amo_va); |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 1145 | if (IPI_amo == 0) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1146 | return; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 1147 | |
| 1148 | spin_lock_irqsave(&part->IPI_lock, irq_flags); |
| 1149 | part->local_IPI_amo |= IPI_amo; |
| 1150 | spin_unlock_irqrestore(&part->IPI_lock, irq_flags); |
| 1151 | |
| 1152 | dev_dbg(xpc_chan, "received IPI from partid=%d, IPI_amo=0x%lx\n", |
| 1153 | XPC_PARTID(part), IPI_amo); |
| 1154 | |
| 1155 | xpc_wakeup_channel_mgr(part); |
| 1156 | } |
| 1157 | |
Dean Nelson | 45d9ca4 | 2008-04-22 14:46:56 -0500 | [diff] [blame] | 1158 | #endif /* _DRIVERS_MISC_SGIXP_XPC_H */ |