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89eb8eb9 DN |
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 | * | |
45d9ca49 | 6 | * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved. |
89eb8eb9 DN |
7 | */ |
8 | ||
89eb8eb9 DN |
9 | /* |
10 | * Cross Partition Communication (XPC) structures and macros. | |
11 | */ | |
12 | ||
45d9ca49 DN |
13 | #ifndef _DRIVERS_MISC_SGIXP_XPC_H |
14 | #define _DRIVERS_MISC_SGIXP_XPC_H | |
89eb8eb9 | 15 | |
89eb8eb9 DN |
16 | #include <linux/interrupt.h> |
17 | #include <linux/sysctl.h> | |
18 | #include <linux/device.h> | |
f9e505a9 JS |
19 | #include <linux/mutex.h> |
20 | #include <linux/completion.h> | |
89eb8eb9 DN |
21 | #include <asm/pgtable.h> |
22 | #include <asm/processor.h> | |
89eb8eb9 DN |
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> | |
45d9ca49 | 27 | #include "xp.h" |
89eb8eb9 | 28 | |
89eb8eb9 DN |
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 | ||
89eb8eb9 DN |
38 | /* |
39 | * The next macros define word or bit representations for given | |
40 | * C-brick nasid in either the SAL provided bit array representing | |
41 | * nasids in the partition/machine or the AMO_t array used for | |
42 | * inter-partition initiation communications. | |
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 */ | |
a607c389 | 56 | #define XPC_HB_CHECK_DEFAULT_INTERVAL 20 /* check HB every x secs */ |
89eb8eb9 DN |
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 | ||
89eb8eb9 | 65 | /* |
4b38fcd4 | 66 | * the reserved page |
89eb8eb9 | 67 | * |
4b38fcd4 DN |
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 | * | |
94bd2708 DN |
74 | * The first two 64-byte cachelines of the reserved page contain the |
75 | * header (struct xpc_rsvd_page). Before SAL initialization has completed, | |
4b38fcd4 | 76 | * SAL has set up the following fields of the reserved page header: |
94bd2708 DN |
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 | |
4b38fcd4 | 79 | * partition's reserved page.) |
89eb8eb9 | 80 | * |
4b38fcd4 DN |
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 | |
94bd2708 | 92 | * by the reserved page header field 'SAL_nasids_size'. (Local partition's |
4b38fcd4 DN |
93 | * mask pointers are xpc_part_nasids and xpc_mach_nasids.) |
94 | * | |
94bd2708 DN |
95 | * vars (ia64-sn2 only) |
96 | * vars part (ia64-sn2 only) | |
4b38fcd4 DN |
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.) | |
89eb8eb9 | 103 | * |
94bd2708 DN |
104 | * Note: Until 'stamp' is set non-zero, the partition XPC code has not been |
105 | * initialized. | |
89eb8eb9 DN |
106 | */ |
107 | struct xpc_rsvd_page { | |
4b38fcd4 DN |
108 | u64 SAL_signature; /* SAL: unique signature */ |
109 | u64 SAL_version; /* SAL: version */ | |
94bd2708 DN |
110 | short SAL_partid; /* SAL: partition ID */ |
111 | short max_npartitions; /* value of XPC_MAX_PARTITIONS */ | |
89eb8eb9 | 112 | u8 version; |
94bd2708 DN |
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; | |
aaa3cd69 DN |
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 */ | |
94bd2708 | 120 | u64 SAL_nasids_size; /* SAL: size of each nasid mask in bytes */ |
89eb8eb9 | 121 | }; |
89eb8eb9 | 122 | |
94bd2708 | 123 | #define XPC_RP_VERSION _XPC_VERSION(2, 0) /* version 2.0 of the reserved page */ |
a607c389 DN |
124 | |
125 | #define XPC_SUPPORTS_RP_STAMP(_version) \ | |
2c2b94f9 | 126 | (_version >= _XPC_VERSION(1, 1)) |
a607c389 | 127 | |
89eb8eb9 DN |
128 | /* |
129 | * Define the structures by which XPC variables can be exported to other | |
130 | * partitions. (There are two: struct xpc_vars and struct xpc_vars_part) | |
131 | */ | |
132 | ||
133 | /* | |
134 | * The following structure describes the partition generic variables | |
135 | * needed by other partitions in order to properly initialize. | |
136 | * | |
137 | * struct xpc_vars version number also applies to struct xpc_vars_part. | |
138 | * Changes to either structure and/or related functionality should be | |
139 | * reflected by incrementing either the major or minor version numbers | |
140 | * of struct xpc_vars. | |
141 | */ | |
33ba3c77 | 142 | struct xpc_vars_sn2 { |
89eb8eb9 DN |
143 | u8 version; |
144 | u64 heartbeat; | |
33ba3c77 | 145 | DECLARE_BITMAP(heartbeating_to_mask, XP_MAX_NPARTITIONS_SN2); |
780d09e8 | 146 | u64 heartbeat_offline; /* if 0, heartbeat should be changing */ |
89eb8eb9 DN |
147 | int act_nasid; |
148 | int act_phys_cpuid; | |
149 | u64 vars_part_pa; | |
150 | u64 amos_page_pa; /* paddr of page of AMOs from MSPEC driver */ | |
151 | AMO_t *amos_page; /* vaddr of page of AMOs from MSPEC driver */ | |
89eb8eb9 | 152 | }; |
89eb8eb9 | 153 | |
2c2b94f9 | 154 | #define XPC_V_VERSION _XPC_VERSION(3, 1) /* version 3.1 of the cross vars */ |
a607c389 DN |
155 | |
156 | #define XPC_SUPPORTS_DISENGAGE_REQUEST(_version) \ | |
2c2b94f9 | 157 | (_version >= _XPC_VERSION(3, 1)) |
a607c389 | 158 | |
a607c389 | 159 | /* |
33ba3c77 DN |
160 | * The following pertains to ia64-sn2 only. |
161 | * | |
162 | * Memory for XPC's AMO variables is allocated by the MSPEC driver. These | |
163 | * pages are located in the lowest granule. The lowest granule uses 4k pages | |
164 | * for cached references and an alternate TLB handler to never provide a | |
165 | * cacheable mapping for the entire region. This will prevent speculative | |
166 | * reading of cached copies of our lines from being issued which will cause | |
167 | * a PI FSB Protocol error to be generated by the SHUB. For XPC, we need 64 | |
168 | * AMO variables (based on XP_MAX_NPARTITIONS_SN2) to identify the senders of | |
169 | * NOTIFY IRQs, 128 AMO variables (based on XP_NASID_MASK_WORDS) to identify | |
170 | * the senders of ACTIVATE IRQs, and 2 AMO variables to identify which remote | |
171 | * partitions (i.e., XPCs) consider themselves currently engaged with the | |
172 | * local XPC. | |
a607c389 | 173 | */ |
33ba3c77 DN |
174 | #define XPC_NOTIFY_IRQ_AMOS 0 |
175 | #define XPC_ACTIVATE_IRQ_AMOS (XPC_NOTIFY_IRQ_AMOS + XP_MAX_NPARTITIONS_SN2) | |
a607c389 DN |
176 | #define XPC_ENGAGED_PARTITIONS_AMO (XPC_ACTIVATE_IRQ_AMOS + XP_NASID_MASK_WORDS) |
177 | #define XPC_DISENGAGE_REQUEST_AMO (XPC_ENGAGED_PARTITIONS_AMO + 1) | |
178 | ||
89eb8eb9 DN |
179 | /* |
180 | * The following structure describes the per partition specific variables. | |
181 | * | |
182 | * An array of these structures, one per partition, will be defined. As a | |
183 | * partition becomes active XPC will copy the array entry corresponding to | |
94bd2708 DN |
184 | * itself from that partition. It is desirable that the size of this structure |
185 | * evenly divides into a 128-byte cacheline, such that none of the entries in | |
186 | * this array crosses a 128-byte cacheline boundary. As it is now, each entry | |
e17d416b | 187 | * occupies 64-bytes. |
89eb8eb9 | 188 | */ |
e17d416b | 189 | struct xpc_vars_part_sn2 { |
2c2b94f9 | 190 | u64 magic; |
89eb8eb9 DN |
191 | |
192 | u64 openclose_args_pa; /* physical address of open and close args */ | |
193 | u64 GPs_pa; /* physical address of Get/Put values */ | |
194 | ||
195 | u64 IPI_amo_pa; /* physical address of IPI AMO_t structure */ | |
196 | int IPI_nasid; /* nasid of where to send IPIs */ | |
197 | int IPI_phys_cpuid; /* physical CPU ID of where to send IPIs */ | |
198 | ||
199 | u8 nchannels; /* #of defined channels supported */ | |
200 | ||
201 | u8 reserved[23]; /* pad to a full 64 bytes */ | |
202 | }; | |
203 | ||
204 | /* | |
205 | * The vars_part MAGIC numbers play a part in the first contact protocol. | |
206 | * | |
207 | * MAGIC1 indicates that the per partition specific variables for a remote | |
208 | * partition have been initialized by this partition. | |
209 | * | |
210 | * MAGIC2 indicates that this partition has pulled the remote partititions | |
211 | * per partition variables that pertain to this partition. | |
212 | */ | |
2c2b94f9 DN |
213 | #define XPC_VP_MAGIC1 0x0053524156435058L /* 'XPCVARS\0'L (little endian) */ |
214 | #define XPC_VP_MAGIC2 0x0073726176435058L /* 'XPCvars\0'L (little endian) */ | |
89eb8eb9 | 215 | |
4b38fcd4 DN |
216 | /* the reserved page sizes and offsets */ |
217 | ||
218 | #define XPC_RP_HEADER_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_rsvd_page)) | |
33ba3c77 | 219 | #define XPC_RP_VARS_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_vars_sn2)) |
4b38fcd4 | 220 | |
2c2b94f9 | 221 | #define XPC_RP_PART_NASIDS(_rp) ((u64 *)((u8 *)(_rp) + XPC_RP_HEADER_SIZE)) |
4b38fcd4 | 222 | #define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + xp_nasid_mask_words) |
33ba3c77 | 223 | #define XPC_RP_VARS(_rp) ((struct xpc_vars_sn2 *)(XPC_RP_MACH_NASIDS(_rp) + \ |
2c2b94f9 | 224 | xp_nasid_mask_words)) |
4b38fcd4 | 225 | |
89eb8eb9 DN |
226 | /* |
227 | * Functions registered by add_timer() or called by kernel_thread() only | |
228 | * allow for a single 64-bit argument. The following macros can be used to | |
229 | * pack and unpack two (32-bit, 16-bit or 8-bit) arguments into or out from | |
230 | * the passed argument. | |
231 | */ | |
232 | #define XPC_PACK_ARGS(_arg1, _arg2) \ | |
233 | ((((u64) _arg1) & 0xffffffff) | \ | |
234 | ((((u64) _arg2) & 0xffffffff) << 32)) | |
235 | ||
236 | #define XPC_UNPACK_ARG1(_args) (((u64) _args) & 0xffffffff) | |
237 | #define XPC_UNPACK_ARG2(_args) ((((u64) _args) >> 32) & 0xffffffff) | |
238 | ||
89eb8eb9 DN |
239 | /* |
240 | * Define a Get/Put value pair (pointers) used with a message queue. | |
241 | */ | |
242 | struct xpc_gp { | |
2c2b94f9 DN |
243 | s64 get; /* Get value */ |
244 | s64 put; /* Put value */ | |
89eb8eb9 DN |
245 | }; |
246 | ||
247 | #define XPC_GP_SIZE \ | |
bc63d387 | 248 | L1_CACHE_ALIGN(sizeof(struct xpc_gp) * XPC_MAX_NCHANNELS) |
89eb8eb9 | 249 | |
89eb8eb9 DN |
250 | /* |
251 | * Define a structure that contains arguments associated with opening and | |
252 | * closing a channel. | |
253 | */ | |
254 | struct xpc_openclose_args { | |
255 | u16 reason; /* reason why channel is closing */ | |
256 | u16 msg_size; /* sizeof each message entry */ | |
257 | u16 remote_nentries; /* #of message entries in remote msg queue */ | |
258 | u16 local_nentries; /* #of message entries in local msg queue */ | |
259 | u64 local_msgqueue_pa; /* physical address of local message queue */ | |
260 | }; | |
261 | ||
262 | #define XPC_OPENCLOSE_ARGS_SIZE \ | |
bc63d387 DN |
263 | L1_CACHE_ALIGN(sizeof(struct xpc_openclose_args) * \ |
264 | XPC_MAX_NCHANNELS) | |
89eb8eb9 | 265 | |
89eb8eb9 DN |
266 | /* struct xpc_msg flags */ |
267 | ||
268 | #define XPC_M_DONE 0x01 /* msg has been received/consumed */ | |
269 | #define XPC_M_READY 0x02 /* msg is ready to be sent */ | |
270 | #define XPC_M_INTERRUPT 0x04 /* send interrupt when msg consumed */ | |
271 | ||
89eb8eb9 DN |
272 | #define XPC_MSG_ADDRESS(_payload) \ |
273 | ((struct xpc_msg *)((u8 *)(_payload) - XPC_MSG_PAYLOAD_OFFSET)) | |
274 | ||
89eb8eb9 DN |
275 | /* |
276 | * Defines notify entry. | |
277 | * | |
278 | * This is used to notify a message's sender that their message was received | |
279 | * and consumed by the intended recipient. | |
280 | */ | |
281 | struct xpc_notify { | |
2c2b94f9 | 282 | u8 type; /* type of notification */ |
89eb8eb9 DN |
283 | |
284 | /* the following two fields are only used if type == XPC_N_CALL */ | |
4a3ad2dd DN |
285 | xpc_notify_func func; /* user's notify function */ |
286 | void *key; /* pointer to user's key */ | |
89eb8eb9 DN |
287 | }; |
288 | ||
289 | /* struct xpc_notify type of notification */ | |
290 | ||
291 | #define XPC_N_CALL 0x01 /* notify function provided by user */ | |
292 | ||
89eb8eb9 DN |
293 | /* |
294 | * Define the structure that manages all the stuff required by a channel. In | |
295 | * particular, they are used to manage the messages sent across the channel. | |
296 | * | |
297 | * This structure is private to a partition, and is NOT shared across the | |
298 | * partition boundary. | |
299 | * | |
300 | * There is an array of these structures for each remote partition. It is | |
301 | * allocated at the time a partition becomes active. The array contains one | |
302 | * of these structures for each potential channel connection to that partition. | |
303 | * | |
33ba3c77 | 304 | >>> sn2 only!!! |
89eb8eb9 DN |
305 | * Each of these structures manages two message queues (circular buffers). |
306 | * They are allocated at the time a channel connection is made. One of | |
307 | * these message queues (local_msgqueue) holds the locally created messages | |
308 | * that are destined for the remote partition. The other of these message | |
309 | * queues (remote_msgqueue) is a locally cached copy of the remote partition's | |
310 | * own local_msgqueue. | |
311 | * | |
312 | * The following is a description of the Get/Put pointers used to manage these | |
313 | * two message queues. Consider the local_msgqueue to be on one partition | |
314 | * and the remote_msgqueue to be its cached copy on another partition. A | |
315 | * description of what each of the lettered areas contains is included. | |
316 | * | |
317 | * | |
318 | * local_msgqueue remote_msgqueue | |
319 | * | |
320 | * |/////////| |/////////| | |
321 | * w_remote_GP.get --> +---------+ |/////////| | |
322 | * | F | |/////////| | |
323 | * remote_GP.get --> +---------+ +---------+ <-- local_GP->get | |
324 | * | | | | | |
325 | * | | | E | | |
326 | * | | | | | |
327 | * | | +---------+ <-- w_local_GP.get | |
328 | * | B | |/////////| | |
329 | * | | |////D////| | |
330 | * | | |/////////| | |
331 | * | | +---------+ <-- w_remote_GP.put | |
332 | * | | |////C////| | |
333 | * local_GP->put --> +---------+ +---------+ <-- remote_GP.put | |
334 | * | | |/////////| | |
335 | * | A | |/////////| | |
336 | * | | |/////////| | |
337 | * w_local_GP.put --> +---------+ |/////////| | |
338 | * |/////////| |/////////| | |
339 | * | |
340 | * | |
341 | * ( remote_GP.[get|put] are cached copies of the remote | |
342 | * partition's local_GP->[get|put], and thus their values can | |
343 | * lag behind their counterparts on the remote partition. ) | |
344 | * | |
345 | * | |
346 | * A - Messages that have been allocated, but have not yet been sent to the | |
347 | * remote partition. | |
348 | * | |
349 | * B - Messages that have been sent, but have not yet been acknowledged by the | |
350 | * remote partition as having been received. | |
351 | * | |
352 | * C - Area that needs to be prepared for the copying of sent messages, by | |
353 | * the clearing of the message flags of any previously received messages. | |
354 | * | |
355 | * D - Area into which sent messages are to be copied from the remote | |
356 | * partition's local_msgqueue and then delivered to their intended | |
357 | * recipients. [ To allow for a multi-message copy, another pointer | |
358 | * (next_msg_to_pull) has been added to keep track of the next message | |
359 | * number needing to be copied (pulled). It chases after w_remote_GP.put. | |
360 | * Any messages lying between w_local_GP.get and next_msg_to_pull have | |
361 | * been copied and are ready to be delivered. ] | |
362 | * | |
363 | * E - Messages that have been copied and delivered, but have not yet been | |
364 | * acknowledged by the recipient as having been received. | |
365 | * | |
366 | * F - Messages that have been acknowledged, but XPC has not yet notified the | |
367 | * sender that the message was received by its intended recipient. | |
368 | * This is also an area that needs to be prepared for the allocating of | |
369 | * new messages, by the clearing of the message flags of the acknowledged | |
370 | * messages. | |
371 | */ | |
372 | struct xpc_channel { | |
64d032ba | 373 | short partid; /* ID of remote partition connected */ |
4a3ad2dd DN |
374 | spinlock_t lock; /* lock for updating this structure */ |
375 | u32 flags; /* general flags */ | |
89eb8eb9 | 376 | |
65c17b80 | 377 | enum xp_retval reason; /* reason why channel is disconnect'g */ |
4a3ad2dd | 378 | int reason_line; /* line# disconnect initiated from */ |
89eb8eb9 | 379 | |
4a3ad2dd | 380 | u16 number; /* channel # */ |
89eb8eb9 | 381 | |
4a3ad2dd DN |
382 | u16 msg_size; /* sizeof each msg entry */ |
383 | u16 local_nentries; /* #of msg entries in local msg queue */ | |
384 | u16 remote_nentries; /* #of msg entries in remote msg queue */ | |
89eb8eb9 DN |
385 | |
386 | void *local_msgqueue_base; /* base address of kmalloc'd space */ | |
387 | struct xpc_msg *local_msgqueue; /* local message queue */ | |
388 | void *remote_msgqueue_base; /* base address of kmalloc'd space */ | |
2c2b94f9 DN |
389 | struct xpc_msg *remote_msgqueue; /* cached copy of remote partition's */ |
390 | /* local message queue */ | |
4a3ad2dd DN |
391 | u64 remote_msgqueue_pa; /* phys addr of remote partition's */ |
392 | /* local message queue */ | |
89eb8eb9 | 393 | |
4a3ad2dd | 394 | atomic_t references; /* #of external references to queues */ |
89eb8eb9 | 395 | |
4a3ad2dd DN |
396 | atomic_t n_on_msg_allocate_wq; /* #on msg allocation wait queue */ |
397 | wait_queue_head_t msg_allocate_wq; /* msg allocation wait queue */ | |
89eb8eb9 | 398 | |
4a3ad2dd DN |
399 | u8 delayed_IPI_flags; /* IPI flags received, but delayed */ |
400 | /* action until channel disconnected */ | |
e54af724 | 401 | |
89eb8eb9 DN |
402 | /* queue of msg senders who want to be notified when msg received */ |
403 | ||
4a3ad2dd | 404 | atomic_t n_to_notify; /* #of msg senders to notify */ |
2c2b94f9 | 405 | struct xpc_notify *notify_queue; /* notify queue for messages sent */ |
89eb8eb9 | 406 | |
4a3ad2dd DN |
407 | xpc_channel_func func; /* user's channel function */ |
408 | void *key; /* pointer to user's key */ | |
89eb8eb9 | 409 | |
f9e505a9 | 410 | struct mutex msg_to_pull_mutex; /* next msg to pull serialization */ |
2c2b94f9 | 411 | struct completion wdisconnect_wait; /* wait for channel disconnect */ |
89eb8eb9 | 412 | |
2c2b94f9 DN |
413 | struct xpc_openclose_args *local_openclose_args; /* args passed on */ |
414 | /* opening or closing of channel */ | |
89eb8eb9 DN |
415 | |
416 | /* various flavors of local and remote Get/Put values */ | |
417 | ||
418 | struct xpc_gp *local_GP; /* local Get/Put values */ | |
419 | struct xpc_gp remote_GP; /* remote Get/Put values */ | |
420 | struct xpc_gp w_local_GP; /* working local Get/Put values */ | |
421 | struct xpc_gp w_remote_GP; /* working remote Get/Put values */ | |
4a3ad2dd | 422 | s64 next_msg_to_pull; /* Put value of next msg to pull */ |
89eb8eb9 DN |
423 | |
424 | /* kthread management related fields */ | |
425 | ||
89eb8eb9 | 426 | atomic_t kthreads_assigned; /* #of kthreads assigned to channel */ |
4a3ad2dd DN |
427 | u32 kthreads_assigned_limit; /* limit on #of kthreads assigned */ |
428 | atomic_t kthreads_idle; /* #of kthreads idle waiting for work */ | |
89eb8eb9 DN |
429 | u32 kthreads_idle_limit; /* limit on #of kthreads idle */ |
430 | atomic_t kthreads_active; /* #of kthreads actively working */ | |
89eb8eb9 DN |
431 | |
432 | wait_queue_head_t idle_wq; /* idle kthread wait queue */ | |
433 | ||
434 | } ____cacheline_aligned; | |
435 | ||
89eb8eb9 DN |
436 | /* struct xpc_channel flags */ |
437 | ||
4a3ad2dd | 438 | #define XPC_C_WASCONNECTED 0x00000001 /* channel was connected */ |
89eb8eb9 | 439 | |
4a3ad2dd DN |
440 | #define XPC_C_ROPENREPLY 0x00000002 /* remote open channel reply */ |
441 | #define XPC_C_OPENREPLY 0x00000004 /* local open channel reply */ | |
2c2b94f9 | 442 | #define XPC_C_ROPENREQUEST 0x00000008 /* remote open channel request */ |
4a3ad2dd | 443 | #define XPC_C_OPENREQUEST 0x00000010 /* local open channel request */ |
89eb8eb9 | 444 | |
2c2b94f9 DN |
445 | #define XPC_C_SETUP 0x00000020 /* channel's msgqueues are alloc'd */ |
446 | #define XPC_C_CONNECTEDCALLOUT 0x00000040 /* connected callout initiated */ | |
4c2cd966 | 447 | #define XPC_C_CONNECTEDCALLOUT_MADE \ |
2c2b94f9 | 448 | 0x00000080 /* connected callout completed */ |
4a3ad2dd DN |
449 | #define XPC_C_CONNECTED 0x00000100 /* local channel is connected */ |
450 | #define XPC_C_CONNECTING 0x00000200 /* channel is being connected */ | |
4c2cd966 | 451 | |
4a3ad2dd DN |
452 | #define XPC_C_RCLOSEREPLY 0x00000400 /* remote close channel reply */ |
453 | #define XPC_C_CLOSEREPLY 0x00000800 /* local close channel reply */ | |
2c2b94f9 DN |
454 | #define XPC_C_RCLOSEREQUEST 0x00001000 /* remote close channel request */ |
455 | #define XPC_C_CLOSEREQUEST 0x00002000 /* local close channel request */ | |
4c2cd966 | 456 | |
4a3ad2dd | 457 | #define XPC_C_DISCONNECTED 0x00004000 /* channel is disconnected */ |
2c2b94f9 | 458 | #define XPC_C_DISCONNECTING 0x00008000 /* channel is being disconnected */ |
4c2cd966 | 459 | #define XPC_C_DISCONNECTINGCALLOUT \ |
2c2b94f9 | 460 | 0x00010000 /* disconnecting callout initiated */ |
4c2cd966 | 461 | #define XPC_C_DISCONNECTINGCALLOUT_MADE \ |
2c2b94f9 DN |
462 | 0x00020000 /* disconnecting callout completed */ |
463 | #define XPC_C_WDISCONNECT 0x00040000 /* waiting for channel disconnect */ | |
89eb8eb9 DN |
464 | |
465 | /* | |
466 | * Manages channels on a partition basis. There is one of these structures | |
467 | * for each partition (a partition will never utilize the structure that | |
468 | * represents itself). | |
469 | */ | |
470 | struct xpc_partition { | |
471 | ||
472 | /* XPC HB infrastructure */ | |
473 | ||
4a3ad2dd | 474 | u8 remote_rp_version; /* version# of partition's rsvd pg */ |
aaa3cd69 | 475 | unsigned long remote_rp_stamp; /* time when rsvd pg was initialized */ |
4a3ad2dd DN |
476 | u64 remote_rp_pa; /* phys addr of partition's rsvd pg */ |
477 | u64 remote_vars_pa; /* phys addr of partition's vars */ | |
89eb8eb9 | 478 | u64 remote_vars_part_pa; /* phys addr of partition's vars part */ |
4a3ad2dd | 479 | u64 last_heartbeat; /* HB at last read */ |
89eb8eb9 | 480 | u64 remote_amos_page_pa; /* phys addr of partition's amos page */ |
4a3ad2dd | 481 | int remote_act_nasid; /* active part's act/deact nasid */ |
89eb8eb9 | 482 | int remote_act_phys_cpuid; /* active part's act/deact phys cpuid */ |
4a3ad2dd DN |
483 | u32 act_IRQ_rcvd; /* IRQs since activation */ |
484 | spinlock_t act_lock; /* protect updating of act_state */ | |
485 | u8 act_state; /* from XPC HB viewpoint */ | |
486 | u8 remote_vars_version; /* version# of partition's vars */ | |
65c17b80 | 487 | enum xp_retval reason; /* reason partition is deactivating */ |
4a3ad2dd DN |
488 | int reason_line; /* line# deactivation initiated from */ |
489 | int reactivate_nasid; /* nasid in partition to reactivate */ | |
490 | ||
491 | unsigned long disengage_request_timeout; /* timeout in jiffies */ | |
a607c389 DN |
492 | struct timer_list disengage_request_timer; |
493 | ||
89eb8eb9 DN |
494 | /* XPC infrastructure referencing and teardown control */ |
495 | ||
2c2b94f9 | 496 | u8 setup_state; /* infrastructure setup state */ |
89eb8eb9 | 497 | wait_queue_head_t teardown_wq; /* kthread waiting to teardown infra */ |
4a3ad2dd | 498 | atomic_t references; /* #of references to infrastructure */ |
89eb8eb9 | 499 | |
4a3ad2dd | 500 | u8 nchannels; /* #of defined channels supported */ |
2c2b94f9 DN |
501 | atomic_t nchannels_active; /* #of channels that are not DISCONNECTED */ |
502 | atomic_t nchannels_engaged; /* #of channels engaged with remote part */ | |
4a3ad2dd DN |
503 | struct xpc_channel *channels; /* array of channel structures */ |
504 | ||
505 | void *local_GPs_base; /* base address of kmalloc'd space */ | |
506 | struct xpc_gp *local_GPs; /* local Get/Put values */ | |
507 | void *remote_GPs_base; /* base address of kmalloc'd space */ | |
2c2b94f9 DN |
508 | struct xpc_gp *remote_GPs; /* copy of remote partition's local */ |
509 | /* Get/Put values */ | |
4a3ad2dd DN |
510 | u64 remote_GPs_pa; /* phys address of remote partition's local */ |
511 | /* Get/Put values */ | |
89eb8eb9 DN |
512 | |
513 | /* fields used to pass args when opening or closing a channel */ | |
514 | ||
2c2b94f9 DN |
515 | void *local_openclose_args_base; /* base address of kmalloc'd space */ |
516 | struct xpc_openclose_args *local_openclose_args; /* local's args */ | |
517 | void *remote_openclose_args_base; /* base address of kmalloc'd space */ | |
518 | struct xpc_openclose_args *remote_openclose_args; /* copy of remote's */ | |
519 | /* args */ | |
4a3ad2dd | 520 | u64 remote_openclose_args_pa; /* phys addr of remote's args */ |
89eb8eb9 DN |
521 | |
522 | /* IPI sending, receiving and handling related fields */ | |
523 | ||
4a3ad2dd DN |
524 | int remote_IPI_nasid; /* nasid of where to send IPIs */ |
525 | int remote_IPI_phys_cpuid; /* phys CPU ID of where to send IPIs */ | |
2c2b94f9 | 526 | AMO_t *remote_IPI_amo_va; /* address of remote IPI AMO_t structure */ |
89eb8eb9 | 527 | |
4a3ad2dd DN |
528 | AMO_t *local_IPI_amo_va; /* address of IPI AMO_t structure */ |
529 | u64 local_IPI_amo; /* IPI amo flags yet to be handled */ | |
530 | char IPI_owner[8]; /* IPI owner's name */ | |
531 | struct timer_list dropped_IPI_timer; /* dropped IPI timer */ | |
89eb8eb9 | 532 | |
4a3ad2dd | 533 | spinlock_t IPI_lock; /* IPI handler lock */ |
89eb8eb9 DN |
534 | |
535 | /* channel manager related fields */ | |
536 | ||
537 | atomic_t channel_mgr_requests; /* #of requests to activate chan mgr */ | |
4a3ad2dd | 538 | wait_queue_head_t channel_mgr_wq; /* channel mgr's wait queue */ |
89eb8eb9 DN |
539 | |
540 | } ____cacheline_aligned; | |
541 | ||
89eb8eb9 DN |
542 | /* struct xpc_partition act_state values (for XPC HB) */ |
543 | ||
544 | #define XPC_P_INACTIVE 0x00 /* partition is not active */ | |
545 | #define XPC_P_ACTIVATION_REQ 0x01 /* created thread to activate */ | |
546 | #define XPC_P_ACTIVATING 0x02 /* activation thread started */ | |
547 | #define XPC_P_ACTIVE 0x03 /* xpc_partition_up() was called */ | |
548 | #define XPC_P_DEACTIVATING 0x04 /* partition deactivation initiated */ | |
549 | ||
89eb8eb9 DN |
550 | #define XPC_DEACTIVATE_PARTITION(_p, _reason) \ |
551 | xpc_deactivate_partition(__LINE__, (_p), (_reason)) | |
552 | ||
89eb8eb9 DN |
553 | /* struct xpc_partition setup_state values */ |
554 | ||
555 | #define XPC_P_UNSET 0x00 /* infrastructure was never setup */ | |
556 | #define XPC_P_SETUP 0x01 /* infrastructure is setup */ | |
557 | #define XPC_P_WTEARDOWN 0x02 /* waiting to teardown infrastructure */ | |
558 | #define XPC_P_TORNDOWN 0x03 /* infrastructure is torndown */ | |
559 | ||
89eb8eb9 DN |
560 | /* |
561 | * struct xpc_partition IPI_timer #of seconds to wait before checking for | |
562 | * dropped IPIs. These occur whenever an IPI amo write doesn't complete until | |
563 | * after the IPI was received. | |
564 | */ | |
e17d416b | 565 | #define XPC_P_DROPPED_IPI_WAIT_INTERVAL (0.25 * HZ) |
89eb8eb9 | 566 | |
a607c389 | 567 | /* number of seconds to wait for other partitions to disengage */ |
e54af724 | 568 | #define XPC_DISENGAGE_REQUEST_DEFAULT_TIMELIMIT 90 |
a607c389 DN |
569 | |
570 | /* interval in seconds to print 'waiting disengagement' messages */ | |
571 | #define XPC_DISENGAGE_PRINTMSG_INTERVAL 10 | |
572 | ||
64d032ba | 573 | #define XPC_PARTID(_p) ((short)((_p) - &xpc_partitions[0])) |
89eb8eb9 | 574 | |
89eb8eb9 DN |
575 | /* found in xp_main.c */ |
576 | extern struct xpc_registration xpc_registrations[]; | |
577 | ||
e54af724 | 578 | /* found in xpc_main.c */ |
89eb8eb9 DN |
579 | extern struct device *xpc_part; |
580 | extern struct device *xpc_chan; | |
e54af724 | 581 | extern int xpc_disengage_request_timelimit; |
1ecaded8 | 582 | extern int xpc_disengage_request_timedout; |
33ba3c77 DN |
583 | extern atomic_t xpc_act_IRQ_rcvd; |
584 | extern wait_queue_head_t xpc_act_IRQ_wq; | |
585 | extern void *xpc_heartbeating_to_mask; | |
5dcded1b | 586 | extern irqreturn_t xpc_notify_IRQ_handler(int, void *); |
89eb8eb9 | 587 | extern void xpc_dropped_IPI_check(struct xpc_partition *); |
e54af724 | 588 | extern void xpc_activate_partition(struct xpc_partition *); |
89eb8eb9 | 589 | extern void xpc_activate_kthreads(struct xpc_channel *, int); |
a460ef8d | 590 | extern void xpc_create_kthreads(struct xpc_channel *, int, int); |
89eb8eb9 | 591 | extern void xpc_disconnect_wait(int); |
94bd2708 | 592 | extern enum xp_retval (*xpc_rsvd_page_init) (struct xpc_rsvd_page *); |
33ba3c77 DN |
593 | extern void (*xpc_heartbeat_init) (void); |
594 | extern void (*xpc_heartbeat_exit) (void); | |
595 | extern void (*xpc_increment_heartbeat) (void); | |
596 | extern void (*xpc_offline_heartbeat) (void); | |
597 | extern void (*xpc_online_heartbeat) (void); | |
598 | extern void (*xpc_check_remote_hb) (void); | |
e17d416b DN |
599 | extern enum xp_retval (*xpc_make_first_contact) (struct xpc_partition *); |
600 | extern u64 (*xpc_get_IPI_flags) (struct xpc_partition *); | |
601 | extern struct xpc_msg *(*xpc_get_deliverable_msg) (struct xpc_channel *); | |
33ba3c77 DN |
602 | extern void (*xpc_initiate_partition_activation) (struct xpc_rsvd_page *, u64, |
603 | int); | |
604 | extern void (*xpc_process_act_IRQ_rcvd) (int); | |
e17d416b DN |
605 | extern enum xp_retval (*xpc_setup_infrastructure) (struct xpc_partition *); |
606 | extern void (*xpc_teardown_infrastructure) (struct xpc_partition *); | |
33ba3c77 DN |
607 | extern void (*xpc_mark_partition_engaged) (struct xpc_partition *); |
608 | extern void (*xpc_mark_partition_disengaged) (struct xpc_partition *); | |
609 | extern void (*xpc_request_partition_disengage) (struct xpc_partition *); | |
610 | extern void (*xpc_cancel_partition_disengage_request) (struct xpc_partition *); | |
611 | extern u64 (*xpc_partition_engaged) (u64); | |
612 | extern u64 (*xpc_partition_disengage_requested) (u64);; | |
613 | extern void (*xpc_clear_partition_engaged) (u64); | |
614 | extern void (*xpc_clear_partition_disengage_request) (u64); | |
615 | ||
616 | extern void (*xpc_IPI_send_local_activate) (int); | |
617 | extern void (*xpc_IPI_send_activated) (struct xpc_partition *); | |
618 | extern void (*xpc_IPI_send_local_reactivate) (int); | |
619 | extern void (*xpc_IPI_send_disengage) (struct xpc_partition *); | |
620 | ||
621 | extern void (*xpc_IPI_send_closerequest) (struct xpc_channel *, | |
622 | unsigned long *); | |
623 | extern void (*xpc_IPI_send_closereply) (struct xpc_channel *, unsigned long *); | |
624 | extern void (*xpc_IPI_send_openrequest) (struct xpc_channel *, unsigned long *); | |
625 | extern void (*xpc_IPI_send_openreply) (struct xpc_channel *, unsigned long *); | |
626 | ||
627 | extern enum xp_retval (*xpc_allocate_msg) (struct xpc_channel *, u32, | |
628 | struct xpc_msg **); | |
629 | extern enum xp_retval (*xpc_send_msg) (struct xpc_channel *, struct xpc_msg *, | |
630 | u8, xpc_notify_func, void *); | |
631 | extern void (*xpc_received_msg) (struct xpc_channel *, struct xpc_msg *); | |
94bd2708 DN |
632 | |
633 | /* found in xpc_sn2.c */ | |
634 | extern void xpc_init_sn2(void); | |
94bd2708 DN |
635 | |
636 | /* found in xpc_uv.c */ | |
637 | extern void xpc_init_uv(void); | |
638 | ||
89eb8eb9 DN |
639 | /* found in xpc_partition.c */ |
640 | extern int xpc_exiting; | |
94bd2708 | 641 | extern int xp_nasid_mask_words; |
89eb8eb9 | 642 | extern struct xpc_rsvd_page *xpc_rsvd_page; |
33ba3c77 | 643 | extern u64 *xpc_mach_nasids; |
bc63d387 | 644 | extern struct xpc_partition *xpc_partitions; |
7682a4c6 DN |
645 | extern char *xpc_remote_copy_buffer; |
646 | extern void *xpc_remote_copy_buffer_base; | |
647 | extern void *xpc_kmalloc_cacheline_aligned(size_t, gfp_t, void **); | |
94bd2708 | 648 | extern struct xpc_rsvd_page *xpc_setup_rsvd_page(void); |
89eb8eb9 DN |
649 | extern void xpc_allow_IPI_ops(void); |
650 | extern void xpc_restrict_IPI_ops(void); | |
651 | extern int xpc_identify_act_IRQ_sender(void); | |
a607c389 | 652 | extern int xpc_partition_disengaged(struct xpc_partition *); |
65c17b80 | 653 | extern enum xp_retval xpc_mark_partition_active(struct xpc_partition *); |
89eb8eb9 DN |
654 | extern void xpc_mark_partition_inactive(struct xpc_partition *); |
655 | extern void xpc_discovery(void); | |
33ba3c77 DN |
656 | extern enum xp_retval xpc_get_remote_rp(int, u64 *, struct xpc_rsvd_page *, |
657 | u64 *); | |
89eb8eb9 | 658 | extern void xpc_deactivate_partition(const int, struct xpc_partition *, |
65c17b80 | 659 | enum xp_retval); |
64d032ba | 660 | extern enum xp_retval xpc_initiate_partid_to_nasids(short, void *); |
89eb8eb9 | 661 | |
89eb8eb9 | 662 | /* found in xpc_channel.c */ |
e17d416b | 663 | extern void *xpc_kzalloc_cacheline_aligned(size_t, gfp_t, void **); |
89eb8eb9 DN |
664 | extern void xpc_initiate_connect(int); |
665 | extern void xpc_initiate_disconnect(int); | |
33ba3c77 | 666 | extern enum xp_retval xpc_allocate_msg_wait(struct xpc_channel *); |
64d032ba DN |
667 | extern enum xp_retval xpc_initiate_allocate(short, int, u32, void **); |
668 | extern enum xp_retval xpc_initiate_send(short, int, void *); | |
669 | extern enum xp_retval xpc_initiate_send_notify(short, int, void *, | |
65c17b80 | 670 | xpc_notify_func, void *); |
64d032ba | 671 | extern void xpc_initiate_received(short, int, void *); |
89eb8eb9 DN |
672 | extern void xpc_process_channel_activity(struct xpc_partition *); |
673 | extern void xpc_connected_callout(struct xpc_channel *); | |
674 | extern void xpc_deliver_msg(struct xpc_channel *); | |
675 | extern void xpc_disconnect_channel(const int, struct xpc_channel *, | |
65c17b80 DN |
676 | enum xp_retval, unsigned long *); |
677 | extern void xpc_disconnect_callout(struct xpc_channel *, enum xp_retval); | |
678 | extern void xpc_partition_going_down(struct xpc_partition *, enum xp_retval); | |
89eb8eb9 | 679 | |
33ba3c77 DN |
680 | static inline int |
681 | xpc_hb_allowed(short partid, void *heartbeating_to_mask) | |
682 | { | |
683 | return test_bit(partid, heartbeating_to_mask); | |
684 | } | |
685 | ||
686 | static inline int | |
687 | xpc_any_hbs_allowed(void) | |
688 | { | |
689 | DBUG_ON(xpc_heartbeating_to_mask == NULL); | |
690 | return !bitmap_empty(xpc_heartbeating_to_mask, xp_max_npartitions); | |
691 | } | |
692 | ||
693 | static inline void | |
694 | xpc_allow_hb(short partid) | |
695 | { | |
696 | DBUG_ON(xpc_heartbeating_to_mask == NULL); | |
697 | set_bit(partid, xpc_heartbeating_to_mask); | |
698 | } | |
699 | ||
700 | static inline void | |
701 | xpc_disallow_hb(short partid) | |
702 | { | |
703 | DBUG_ON(xpc_heartbeating_to_mask == NULL); | |
704 | clear_bit(partid, xpc_heartbeating_to_mask); | |
705 | } | |
706 | ||
707 | static inline void | |
708 | xpc_disallow_all_hbs(void) | |
709 | { | |
710 | DBUG_ON(xpc_heartbeating_to_mask == NULL); | |
711 | bitmap_zero(xpc_heartbeating_to_mask, xp_max_npartitions); | |
712 | } | |
713 | ||
89eb8eb9 DN |
714 | static inline void |
715 | xpc_wakeup_channel_mgr(struct xpc_partition *part) | |
716 | { | |
2c2b94f9 | 717 | if (atomic_inc_return(&part->channel_mgr_requests) == 1) |
89eb8eb9 | 718 | wake_up(&part->channel_mgr_wq); |
89eb8eb9 DN |
719 | } |
720 | ||
89eb8eb9 DN |
721 | /* |
722 | * These next two inlines are used to keep us from tearing down a channel's | |
723 | * msg queues while a thread may be referencing them. | |
724 | */ | |
725 | static inline void | |
726 | xpc_msgqueue_ref(struct xpc_channel *ch) | |
727 | { | |
728 | atomic_inc(&ch->references); | |
729 | } | |
730 | ||
731 | static inline void | |
732 | xpc_msgqueue_deref(struct xpc_channel *ch) | |
733 | { | |
734 | s32 refs = atomic_dec_return(&ch->references); | |
735 | ||
736 | DBUG_ON(refs < 0); | |
2c2b94f9 | 737 | if (refs == 0) |
89eb8eb9 | 738 | xpc_wakeup_channel_mgr(&xpc_partitions[ch->partid]); |
89eb8eb9 DN |
739 | } |
740 | ||
89eb8eb9 DN |
741 | #define XPC_DISCONNECT_CHANNEL(_ch, _reason, _irqflgs) \ |
742 | xpc_disconnect_channel(__LINE__, _ch, _reason, _irqflgs) | |
743 | ||
89eb8eb9 DN |
744 | /* |
745 | * These two inlines are used to keep us from tearing down a partition's | |
746 | * setup infrastructure while a thread may be referencing it. | |
747 | */ | |
748 | static inline void | |
749 | xpc_part_deref(struct xpc_partition *part) | |
750 | { | |
751 | s32 refs = atomic_dec_return(&part->references); | |
752 | ||
89eb8eb9 | 753 | DBUG_ON(refs < 0); |
2c2b94f9 | 754 | if (refs == 0 && part->setup_state == XPC_P_WTEARDOWN) |
89eb8eb9 | 755 | wake_up(&part->teardown_wq); |
89eb8eb9 DN |
756 | } |
757 | ||
758 | static inline int | |
759 | xpc_part_ref(struct xpc_partition *part) | |
760 | { | |
761 | int setup; | |
762 | ||
89eb8eb9 DN |
763 | atomic_inc(&part->references); |
764 | setup = (part->setup_state == XPC_P_SETUP); | |
2c2b94f9 | 765 | if (!setup) |
89eb8eb9 | 766 | xpc_part_deref(part); |
2c2b94f9 | 767 | |
89eb8eb9 DN |
768 | return setup; |
769 | } | |
770 | ||
89eb8eb9 DN |
771 | /* |
772 | * The following macro is to be used for the setting of the reason and | |
773 | * reason_line fields in both the struct xpc_channel and struct xpc_partition | |
774 | * structures. | |
775 | */ | |
776 | #define XPC_SET_REASON(_p, _reason, _line) \ | |
777 | { \ | |
778 | (_p)->reason = _reason; \ | |
779 | (_p)->reason_line = _line; \ | |
780 | } | |
781 | ||
a607c389 | 782 | /* |
33ba3c77 | 783 | * The sending and receiving of IPIs includes the setting of an >>>AMO variable |
89eb8eb9 DN |
784 | * to indicate the reason the IPI was sent. The 64-bit variable is divided |
785 | * up into eight bytes, ordered from right to left. Byte zero pertains to | |
786 | * channel 0, byte one to channel 1, and so on. Each byte is described by | |
787 | * the following IPI flags. | |
788 | */ | |
789 | ||
790 | #define XPC_IPI_CLOSEREQUEST 0x01 | |
791 | #define XPC_IPI_CLOSEREPLY 0x02 | |
792 | #define XPC_IPI_OPENREQUEST 0x04 | |
793 | #define XPC_IPI_OPENREPLY 0x08 | |
794 | #define XPC_IPI_MSGREQUEST 0x10 | |
795 | ||
33ba3c77 | 796 | /* given an >>>AMO variable and a channel#, get its associated IPI flags */ |
89eb8eb9 | 797 | #define XPC_GET_IPI_FLAGS(_amo, _c) ((u8) (((_amo) >> ((_c) * 8)) & 0xff)) |
e54af724 | 798 | #define XPC_SET_IPI_FLAGS(_amo, _c, _f) (_amo) |= ((u64) (_f) << ((_c) * 8)) |
89eb8eb9 | 799 | |
2c2b94f9 DN |
800 | #define XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(_amo) ((_amo) & 0x0f0f0f0f0f0f0f0fUL) |
801 | #define XPC_ANY_MSG_IPI_FLAGS_SET(_amo) ((_amo) & 0x1010101010101010UL) | |
89eb8eb9 | 802 | |
45d9ca49 | 803 | #endif /* _DRIVERS_MISC_SGIXP_XPC_H */ |