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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 | |
261f3b49 | 16 | #include <linux/wait.h> |
f9e505a9 | 17 | #include <linux/completion.h> |
261f3b49 DN |
18 | #include <linux/timer.h> |
19 | #include <linux/sched.h> | |
45d9ca49 | 20 | #include "xp.h" |
89eb8eb9 | 21 | |
89eb8eb9 DN |
22 | /* |
23 | * XPC Version numbers consist of a major and minor number. XPC can always | |
24 | * talk to versions with same major #, and never talk to versions with a | |
25 | * different major #. | |
26 | */ | |
27 | #define _XPC_VERSION(_maj, _min) (((_maj) << 4) | ((_min) & 0xf)) | |
28 | #define XPC_VERSION_MAJOR(_v) ((_v) >> 4) | |
29 | #define XPC_VERSION_MINOR(_v) ((_v) & 0xf) | |
30 | ||
04de7418 | 31 | /* define frequency of the heartbeat and frequency how often it's checked */ |
89eb8eb9 | 32 | #define XPC_HB_DEFAULT_INTERVAL 5 /* incr HB every x secs */ |
a607c389 | 33 | #define XPC_HB_CHECK_DEFAULT_INTERVAL 20 /* check HB every x secs */ |
89eb8eb9 DN |
34 | |
35 | /* define the process name of HB checker and the CPU it is pinned to */ | |
36 | #define XPC_HB_CHECK_THREAD_NAME "xpc_hb" | |
37 | #define XPC_HB_CHECK_CPU 0 | |
38 | ||
39 | /* define the process name of the discovery thread */ | |
40 | #define XPC_DISCOVERY_THREAD_NAME "xpc_discovery" | |
41 | ||
89eb8eb9 | 42 | /* |
4b38fcd4 | 43 | * the reserved page |
89eb8eb9 | 44 | * |
4b38fcd4 DN |
45 | * SAL reserves one page of memory per partition for XPC. Though a full page |
46 | * in length (16384 bytes), its starting address is not page aligned, but it | |
47 | * is cacheline aligned. The reserved page consists of the following: | |
48 | * | |
49 | * reserved page header | |
50 | * | |
94bd2708 DN |
51 | * The first two 64-byte cachelines of the reserved page contain the |
52 | * header (struct xpc_rsvd_page). Before SAL initialization has completed, | |
4b38fcd4 | 53 | * SAL has set up the following fields of the reserved page header: |
94bd2708 DN |
54 | * SAL_signature, SAL_version, SAL_partid, and SAL_nasids_size. The |
55 | * other fields are set up by XPC. (xpc_rsvd_page points to the local | |
4b38fcd4 | 56 | * partition's reserved page.) |
89eb8eb9 | 57 | * |
4b38fcd4 DN |
58 | * part_nasids mask |
59 | * mach_nasids mask | |
60 | * | |
61 | * SAL also sets up two bitmaps (or masks), one that reflects the actual | |
62 | * nasids in this partition (part_nasids), and the other that reflects | |
63 | * the actual nasids in the entire machine (mach_nasids). We're only | |
64 | * interested in the even numbered nasids (which contain the processors | |
65 | * and/or memory), so we only need half as many bits to represent the | |
04de7418 DN |
66 | * nasids. When mapping nasid to bit in a mask (or bit to nasid) be sure |
67 | * to either divide or multiply by 2. The part_nasids mask is located | |
68 | * starting at the first cacheline following the reserved page header. The | |
69 | * mach_nasids mask follows right after the part_nasids mask. The size in | |
70 | * bytes of each mask is reflected by the reserved page header field | |
71 | * 'SAL_nasids_size'. (Local partition's mask pointers are xpc_part_nasids | |
72 | * and xpc_mach_nasids.) | |
4b38fcd4 | 73 | * |
94bd2708 DN |
74 | * vars (ia64-sn2 only) |
75 | * vars part (ia64-sn2 only) | |
4b38fcd4 DN |
76 | * |
77 | * Immediately following the mach_nasids mask are the XPC variables | |
78 | * required by other partitions. First are those that are generic to all | |
79 | * partitions (vars), followed on the next available cacheline by those | |
80 | * which are partition specific (vars part). These are setup by XPC. | |
81 | * (Local partition's vars pointers are xpc_vars and xpc_vars_part.) | |
89eb8eb9 | 82 | * |
81fe7883 | 83 | * Note: Until 'ts_jiffies' is set non-zero, the partition XPC code has not been |
94bd2708 | 84 | * initialized. |
89eb8eb9 DN |
85 | */ |
86 | struct xpc_rsvd_page { | |
4b38fcd4 DN |
87 | u64 SAL_signature; /* SAL: unique signature */ |
88 | u64 SAL_version; /* SAL: version */ | |
94bd2708 DN |
89 | short SAL_partid; /* SAL: partition ID */ |
90 | short max_npartitions; /* value of XPC_MAX_PARTITIONS */ | |
89eb8eb9 | 91 | u8 version; |
94bd2708 DN |
92 | u8 pad1[3]; /* align to next u64 in 1st 64-byte cacheline */ |
93 | union { | |
a812dcc3 DN |
94 | unsigned long vars_pa; /* phys address of struct xpc_vars */ |
95 | unsigned long activate_mq_gpa; /* gru phy addr of activate_mq */ | |
94bd2708 | 96 | } sn; |
81fe7883 | 97 | unsigned long ts_jiffies; /* timestamp when rsvd pg was setup by XPC */ |
aaa3cd69 | 98 | u64 pad2[10]; /* align to last u64 in 2nd 64-byte cacheline */ |
94bd2708 | 99 | u64 SAL_nasids_size; /* SAL: size of each nasid mask in bytes */ |
89eb8eb9 | 100 | }; |
89eb8eb9 | 101 | |
94bd2708 | 102 | #define XPC_RP_VERSION _XPC_VERSION(2, 0) /* version 2.0 of the reserved page */ |
a607c389 | 103 | |
89eb8eb9 DN |
104 | /* |
105 | * Define the structures by which XPC variables can be exported to other | |
106 | * partitions. (There are two: struct xpc_vars and struct xpc_vars_part) | |
107 | */ | |
108 | ||
109 | /* | |
110 | * The following structure describes the partition generic variables | |
111 | * needed by other partitions in order to properly initialize. | |
112 | * | |
113 | * struct xpc_vars version number also applies to struct xpc_vars_part. | |
114 | * Changes to either structure and/or related functionality should be | |
115 | * reflected by incrementing either the major or minor version numbers | |
116 | * of struct xpc_vars. | |
117 | */ | |
33ba3c77 | 118 | struct xpc_vars_sn2 { |
89eb8eb9 DN |
119 | u8 version; |
120 | u64 heartbeat; | |
33ba3c77 | 121 | DECLARE_BITMAP(heartbeating_to_mask, XP_MAX_NPARTITIONS_SN2); |
780d09e8 | 122 | u64 heartbeat_offline; /* if 0, heartbeat should be changing */ |
a47d5dac DN |
123 | int activate_IRQ_nasid; |
124 | int activate_IRQ_phys_cpuid; | |
a812dcc3 DN |
125 | unsigned long vars_part_pa; |
126 | unsigned long amos_page_pa;/* paddr of page of amos from MSPEC driver */ | |
c39838ce | 127 | struct amo *amos_page; /* vaddr of page of amos from MSPEC driver */ |
89eb8eb9 | 128 | }; |
89eb8eb9 | 129 | |
2c2b94f9 | 130 | #define XPC_V_VERSION _XPC_VERSION(3, 1) /* version 3.1 of the cross vars */ |
a607c389 | 131 | |
89eb8eb9 DN |
132 | /* |
133 | * The following structure describes the per partition specific variables. | |
134 | * | |
135 | * An array of these structures, one per partition, will be defined. As a | |
136 | * partition becomes active XPC will copy the array entry corresponding to | |
94bd2708 DN |
137 | * itself from that partition. It is desirable that the size of this structure |
138 | * evenly divides into a 128-byte cacheline, such that none of the entries in | |
139 | * this array crosses a 128-byte cacheline boundary. As it is now, each entry | |
e17d416b | 140 | * occupies 64-bytes. |
89eb8eb9 | 141 | */ |
e17d416b | 142 | struct xpc_vars_part_sn2 { |
2c2b94f9 | 143 | u64 magic; |
89eb8eb9 | 144 | |
a812dcc3 DN |
145 | unsigned long openclose_args_pa; /* phys addr of open and close args */ |
146 | unsigned long GPs_pa; /* physical address of Get/Put values */ | |
89eb8eb9 | 147 | |
a812dcc3 | 148 | unsigned long chctl_amo_pa; /* physical address of chctl flags' amo */ |
7fb5e59d DN |
149 | |
150 | int notify_IRQ_nasid; /* nasid of where to send notify IRQs */ | |
151 | int notify_IRQ_phys_cpuid; /* CPUID of where to send notify IRQs */ | |
89eb8eb9 DN |
152 | |
153 | u8 nchannels; /* #of defined channels supported */ | |
154 | ||
155 | u8 reserved[23]; /* pad to a full 64 bytes */ | |
156 | }; | |
157 | ||
158 | /* | |
159 | * The vars_part MAGIC numbers play a part in the first contact protocol. | |
160 | * | |
161 | * MAGIC1 indicates that the per partition specific variables for a remote | |
162 | * partition have been initialized by this partition. | |
163 | * | |
164 | * MAGIC2 indicates that this partition has pulled the remote partititions | |
165 | * per partition variables that pertain to this partition. | |
166 | */ | |
2c2b94f9 DN |
167 | #define XPC_VP_MAGIC1 0x0053524156435058L /* 'XPCVARS\0'L (little endian) */ |
168 | #define XPC_VP_MAGIC2 0x0073726176435058L /* 'XPCvars\0'L (little endian) */ | |
89eb8eb9 | 169 | |
4b38fcd4 DN |
170 | /* the reserved page sizes and offsets */ |
171 | ||
172 | #define XPC_RP_HEADER_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_rsvd_page)) | |
33ba3c77 | 173 | #define XPC_RP_VARS_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_vars_sn2)) |
4b38fcd4 | 174 | |
261f3b49 DN |
175 | #define XPC_RP_PART_NASIDS(_rp) ((unsigned long *)((u8 *)(_rp) + \ |
176 | XPC_RP_HEADER_SIZE)) | |
04de7418 DN |
177 | #define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + \ |
178 | xpc_nasid_mask_nlongs) | |
ee6665e3 DN |
179 | #define XPC_RP_VARS(_rp) ((struct xpc_vars_sn2 *) \ |
180 | (XPC_RP_MACH_NASIDS(_rp) + \ | |
04de7418 | 181 | xpc_nasid_mask_nlongs)) |
4b38fcd4 | 182 | |
89eb8eb9 DN |
183 | /* |
184 | * Functions registered by add_timer() or called by kernel_thread() only | |
185 | * allow for a single 64-bit argument. The following macros can be used to | |
186 | * pack and unpack two (32-bit, 16-bit or 8-bit) arguments into or out from | |
187 | * the passed argument. | |
188 | */ | |
189 | #define XPC_PACK_ARGS(_arg1, _arg2) \ | |
ee6665e3 DN |
190 | ((((u64)_arg1) & 0xffffffff) | \ |
191 | ((((u64)_arg2) & 0xffffffff) << 32)) | |
89eb8eb9 | 192 | |
ee6665e3 DN |
193 | #define XPC_UNPACK_ARG1(_args) (((u64)_args) & 0xffffffff) |
194 | #define XPC_UNPACK_ARG2(_args) ((((u64)_args) >> 32) & 0xffffffff) | |
89eb8eb9 | 195 | |
89eb8eb9 DN |
196 | /* |
197 | * Define a Get/Put value pair (pointers) used with a message queue. | |
198 | */ | |
261f3b49 | 199 | struct xpc_gp_sn2 { |
2c2b94f9 DN |
200 | s64 get; /* Get value */ |
201 | s64 put; /* Put value */ | |
89eb8eb9 DN |
202 | }; |
203 | ||
204 | #define XPC_GP_SIZE \ | |
261f3b49 | 205 | L1_CACHE_ALIGN(sizeof(struct xpc_gp_sn2) * XPC_MAX_NCHANNELS) |
89eb8eb9 | 206 | |
89eb8eb9 DN |
207 | /* |
208 | * Define a structure that contains arguments associated with opening and | |
209 | * closing a channel. | |
210 | */ | |
211 | struct xpc_openclose_args { | |
212 | u16 reason; /* reason why channel is closing */ | |
213 | u16 msg_size; /* sizeof each message entry */ | |
214 | u16 remote_nentries; /* #of message entries in remote msg queue */ | |
215 | u16 local_nentries; /* #of message entries in local msg queue */ | |
a812dcc3 | 216 | unsigned long local_msgqueue_pa; /* phys addr of local message queue */ |
89eb8eb9 DN |
217 | }; |
218 | ||
219 | #define XPC_OPENCLOSE_ARGS_SIZE \ | |
bc63d387 DN |
220 | L1_CACHE_ALIGN(sizeof(struct xpc_openclose_args) * \ |
221 | XPC_MAX_NCHANNELS) | |
89eb8eb9 | 222 | |
89eb8eb9 DN |
223 | /* struct xpc_msg flags */ |
224 | ||
225 | #define XPC_M_DONE 0x01 /* msg has been received/consumed */ | |
226 | #define XPC_M_READY 0x02 /* msg is ready to be sent */ | |
227 | #define XPC_M_INTERRUPT 0x04 /* send interrupt when msg consumed */ | |
228 | ||
89eb8eb9 DN |
229 | #define XPC_MSG_ADDRESS(_payload) \ |
230 | ((struct xpc_msg *)((u8 *)(_payload) - XPC_MSG_PAYLOAD_OFFSET)) | |
231 | ||
89eb8eb9 DN |
232 | /* |
233 | * Defines notify entry. | |
234 | * | |
235 | * This is used to notify a message's sender that their message was received | |
236 | * and consumed by the intended recipient. | |
237 | */ | |
238 | struct xpc_notify { | |
2c2b94f9 | 239 | u8 type; /* type of notification */ |
89eb8eb9 DN |
240 | |
241 | /* the following two fields are only used if type == XPC_N_CALL */ | |
4a3ad2dd DN |
242 | xpc_notify_func func; /* user's notify function */ |
243 | void *key; /* pointer to user's key */ | |
89eb8eb9 DN |
244 | }; |
245 | ||
246 | /* struct xpc_notify type of notification */ | |
247 | ||
248 | #define XPC_N_CALL 0x01 /* notify function provided by user */ | |
249 | ||
89eb8eb9 DN |
250 | /* |
251 | * Define the structure that manages all the stuff required by a channel. In | |
252 | * particular, they are used to manage the messages sent across the channel. | |
253 | * | |
254 | * This structure is private to a partition, and is NOT shared across the | |
255 | * partition boundary. | |
256 | * | |
257 | * There is an array of these structures for each remote partition. It is | |
258 | * allocated at the time a partition becomes active. The array contains one | |
259 | * of these structures for each potential channel connection to that partition. | |
ea57f80c DN |
260 | */ |
261 | ||
262 | /* | |
263 | * The following is sn2 only. | |
89eb8eb9 | 264 | * |
ea57f80c | 265 | * Each channel structure manages two message queues (circular buffers). |
89eb8eb9 DN |
266 | * They are allocated at the time a channel connection is made. One of |
267 | * these message queues (local_msgqueue) holds the locally created messages | |
268 | * that are destined for the remote partition. The other of these message | |
269 | * queues (remote_msgqueue) is a locally cached copy of the remote partition's | |
270 | * own local_msgqueue. | |
271 | * | |
272 | * The following is a description of the Get/Put pointers used to manage these | |
273 | * two message queues. Consider the local_msgqueue to be on one partition | |
274 | * and the remote_msgqueue to be its cached copy on another partition. A | |
275 | * description of what each of the lettered areas contains is included. | |
276 | * | |
277 | * | |
278 | * local_msgqueue remote_msgqueue | |
279 | * | |
280 | * |/////////| |/////////| | |
281 | * w_remote_GP.get --> +---------+ |/////////| | |
282 | * | F | |/////////| | |
283 | * remote_GP.get --> +---------+ +---------+ <-- local_GP->get | |
284 | * | | | | | |
285 | * | | | E | | |
286 | * | | | | | |
287 | * | | +---------+ <-- w_local_GP.get | |
288 | * | B | |/////////| | |
289 | * | | |////D////| | |
290 | * | | |/////////| | |
291 | * | | +---------+ <-- w_remote_GP.put | |
292 | * | | |////C////| | |
293 | * local_GP->put --> +---------+ +---------+ <-- remote_GP.put | |
294 | * | | |/////////| | |
295 | * | A | |/////////| | |
296 | * | | |/////////| | |
297 | * w_local_GP.put --> +---------+ |/////////| | |
298 | * |/////////| |/////////| | |
299 | * | |
300 | * | |
301 | * ( remote_GP.[get|put] are cached copies of the remote | |
302 | * partition's local_GP->[get|put], and thus their values can | |
303 | * lag behind their counterparts on the remote partition. ) | |
304 | * | |
305 | * | |
306 | * A - Messages that have been allocated, but have not yet been sent to the | |
307 | * remote partition. | |
308 | * | |
309 | * B - Messages that have been sent, but have not yet been acknowledged by the | |
310 | * remote partition as having been received. | |
311 | * | |
312 | * C - Area that needs to be prepared for the copying of sent messages, by | |
313 | * the clearing of the message flags of any previously received messages. | |
314 | * | |
315 | * D - Area into which sent messages are to be copied from the remote | |
316 | * partition's local_msgqueue and then delivered to their intended | |
317 | * recipients. [ To allow for a multi-message copy, another pointer | |
318 | * (next_msg_to_pull) has been added to keep track of the next message | |
319 | * number needing to be copied (pulled). It chases after w_remote_GP.put. | |
320 | * Any messages lying between w_local_GP.get and next_msg_to_pull have | |
321 | * been copied and are ready to be delivered. ] | |
322 | * | |
323 | * E - Messages that have been copied and delivered, but have not yet been | |
324 | * acknowledged by the recipient as having been received. | |
325 | * | |
326 | * F - Messages that have been acknowledged, but XPC has not yet notified the | |
327 | * sender that the message was received by its intended recipient. | |
328 | * This is also an area that needs to be prepared for the allocating of | |
329 | * new messages, by the clearing of the message flags of the acknowledged | |
330 | * messages. | |
331 | */ | |
ea57f80c | 332 | |
a47d5dac DN |
333 | struct xpc_channel_sn2 { |
334 | ||
335 | /* various flavors of local and remote Get/Put values */ | |
336 | ||
261f3b49 DN |
337 | struct xpc_gp_sn2 *local_GP; /* local Get/Put values */ |
338 | struct xpc_gp_sn2 remote_GP; /* remote Get/Put values */ | |
339 | struct xpc_gp_sn2 w_local_GP; /* working local Get/Put values */ | |
340 | struct xpc_gp_sn2 w_remote_GP; /* working remote Get/Put values */ | |
a47d5dac DN |
341 | s64 next_msg_to_pull; /* Put value of next msg to pull */ |
342 | ||
343 | struct mutex msg_to_pull_mutex; /* next msg to pull serialization */ | |
344 | }; | |
345 | ||
346 | struct xpc_channel_uv { | |
ea57f80c | 347 | /* !!! code is coming */ |
a47d5dac DN |
348 | }; |
349 | ||
89eb8eb9 | 350 | struct xpc_channel { |
64d032ba | 351 | short partid; /* ID of remote partition connected */ |
4a3ad2dd DN |
352 | spinlock_t lock; /* lock for updating this structure */ |
353 | u32 flags; /* general flags */ | |
89eb8eb9 | 354 | |
65c17b80 | 355 | enum xp_retval reason; /* reason why channel is disconnect'g */ |
4a3ad2dd | 356 | int reason_line; /* line# disconnect initiated from */ |
89eb8eb9 | 357 | |
4a3ad2dd | 358 | u16 number; /* channel # */ |
89eb8eb9 | 359 | |
4a3ad2dd DN |
360 | u16 msg_size; /* sizeof each msg entry */ |
361 | u16 local_nentries; /* #of msg entries in local msg queue */ | |
362 | u16 remote_nentries; /* #of msg entries in remote msg queue */ | |
89eb8eb9 DN |
363 | |
364 | void *local_msgqueue_base; /* base address of kmalloc'd space */ | |
365 | struct xpc_msg *local_msgqueue; /* local message queue */ | |
366 | void *remote_msgqueue_base; /* base address of kmalloc'd space */ | |
2c2b94f9 DN |
367 | struct xpc_msg *remote_msgqueue; /* cached copy of remote partition's */ |
368 | /* local message queue */ | |
a812dcc3 DN |
369 | unsigned long remote_msgqueue_pa; /* phys addr of remote partition's */ |
370 | /* local message queue */ | |
89eb8eb9 | 371 | |
4a3ad2dd | 372 | atomic_t references; /* #of external references to queues */ |
89eb8eb9 | 373 | |
4a3ad2dd DN |
374 | atomic_t n_on_msg_allocate_wq; /* #on msg allocation wait queue */ |
375 | wait_queue_head_t msg_allocate_wq; /* msg allocation wait queue */ | |
89eb8eb9 | 376 | |
7fb5e59d | 377 | u8 delayed_chctl_flags; /* chctl flags received, but delayed */ |
4a3ad2dd | 378 | /* action until channel disconnected */ |
e54af724 | 379 | |
89eb8eb9 DN |
380 | /* queue of msg senders who want to be notified when msg received */ |
381 | ||
4a3ad2dd | 382 | atomic_t n_to_notify; /* #of msg senders to notify */ |
2c2b94f9 | 383 | struct xpc_notify *notify_queue; /* notify queue for messages sent */ |
89eb8eb9 | 384 | |
4a3ad2dd DN |
385 | xpc_channel_func func; /* user's channel function */ |
386 | void *key; /* pointer to user's key */ | |
89eb8eb9 | 387 | |
2c2b94f9 | 388 | struct completion wdisconnect_wait; /* wait for channel disconnect */ |
89eb8eb9 | 389 | |
2c2b94f9 DN |
390 | struct xpc_openclose_args *local_openclose_args; /* args passed on */ |
391 | /* opening or closing of channel */ | |
89eb8eb9 | 392 | |
89eb8eb9 DN |
393 | /* kthread management related fields */ |
394 | ||
89eb8eb9 | 395 | atomic_t kthreads_assigned; /* #of kthreads assigned to channel */ |
4a3ad2dd DN |
396 | u32 kthreads_assigned_limit; /* limit on #of kthreads assigned */ |
397 | atomic_t kthreads_idle; /* #of kthreads idle waiting for work */ | |
89eb8eb9 DN |
398 | u32 kthreads_idle_limit; /* limit on #of kthreads idle */ |
399 | atomic_t kthreads_active; /* #of kthreads actively working */ | |
89eb8eb9 DN |
400 | |
401 | wait_queue_head_t idle_wq; /* idle kthread wait queue */ | |
402 | ||
a47d5dac DN |
403 | union { |
404 | struct xpc_channel_sn2 sn2; | |
405 | struct xpc_channel_uv uv; | |
406 | } sn; | |
407 | ||
89eb8eb9 DN |
408 | } ____cacheline_aligned; |
409 | ||
89eb8eb9 DN |
410 | /* struct xpc_channel flags */ |
411 | ||
4a3ad2dd | 412 | #define XPC_C_WASCONNECTED 0x00000001 /* channel was connected */ |
89eb8eb9 | 413 | |
4a3ad2dd DN |
414 | #define XPC_C_ROPENREPLY 0x00000002 /* remote open channel reply */ |
415 | #define XPC_C_OPENREPLY 0x00000004 /* local open channel reply */ | |
2c2b94f9 | 416 | #define XPC_C_ROPENREQUEST 0x00000008 /* remote open channel request */ |
4a3ad2dd | 417 | #define XPC_C_OPENREQUEST 0x00000010 /* local open channel request */ |
89eb8eb9 | 418 | |
2c2b94f9 DN |
419 | #define XPC_C_SETUP 0x00000020 /* channel's msgqueues are alloc'd */ |
420 | #define XPC_C_CONNECTEDCALLOUT 0x00000040 /* connected callout initiated */ | |
4c2cd966 | 421 | #define XPC_C_CONNECTEDCALLOUT_MADE \ |
2c2b94f9 | 422 | 0x00000080 /* connected callout completed */ |
4a3ad2dd DN |
423 | #define XPC_C_CONNECTED 0x00000100 /* local channel is connected */ |
424 | #define XPC_C_CONNECTING 0x00000200 /* channel is being connected */ | |
4c2cd966 | 425 | |
4a3ad2dd DN |
426 | #define XPC_C_RCLOSEREPLY 0x00000400 /* remote close channel reply */ |
427 | #define XPC_C_CLOSEREPLY 0x00000800 /* local close channel reply */ | |
2c2b94f9 DN |
428 | #define XPC_C_RCLOSEREQUEST 0x00001000 /* remote close channel request */ |
429 | #define XPC_C_CLOSEREQUEST 0x00002000 /* local close channel request */ | |
4c2cd966 | 430 | |
4a3ad2dd | 431 | #define XPC_C_DISCONNECTED 0x00004000 /* channel is disconnected */ |
2c2b94f9 | 432 | #define XPC_C_DISCONNECTING 0x00008000 /* channel is being disconnected */ |
4c2cd966 | 433 | #define XPC_C_DISCONNECTINGCALLOUT \ |
2c2b94f9 | 434 | 0x00010000 /* disconnecting callout initiated */ |
4c2cd966 | 435 | #define XPC_C_DISCONNECTINGCALLOUT_MADE \ |
2c2b94f9 DN |
436 | 0x00020000 /* disconnecting callout completed */ |
437 | #define XPC_C_WDISCONNECT 0x00040000 /* waiting for channel disconnect */ | |
89eb8eb9 | 438 | |
7fb5e59d DN |
439 | /* |
440 | * The channel control flags (chctl) union consists of a 64-bit variable which | |
441 | * is divided up into eight bytes, ordered from right to left. Byte zero | |
442 | * pertains to channel 0, byte one to channel 1, and so on. Each channel's byte | |
443 | * can have one or more of the chctl flags set in it. | |
444 | */ | |
445 | ||
446 | union xpc_channel_ctl_flags { | |
447 | u64 all_flags; | |
448 | u8 flags[XPC_MAX_NCHANNELS]; | |
449 | }; | |
450 | ||
451 | /* chctl flags */ | |
452 | #define XPC_CHCTL_CLOSEREQUEST 0x01 | |
453 | #define XPC_CHCTL_CLOSEREPLY 0x02 | |
454 | #define XPC_CHCTL_OPENREQUEST 0x04 | |
455 | #define XPC_CHCTL_OPENREPLY 0x08 | |
456 | #define XPC_CHCTL_MSGREQUEST 0x10 | |
457 | ||
458 | #define XPC_OPENCLOSE_CHCTL_FLAGS \ | |
459 | (XPC_CHCTL_CLOSEREQUEST | XPC_CHCTL_CLOSEREPLY | \ | |
460 | XPC_CHCTL_OPENREQUEST | XPC_CHCTL_OPENREPLY) | |
461 | #define XPC_MSG_CHCTL_FLAGS XPC_CHCTL_MSGREQUEST | |
462 | ||
463 | static inline int | |
464 | xpc_any_openclose_chctl_flags_set(union xpc_channel_ctl_flags *chctl) | |
465 | { | |
466 | int ch_number; | |
467 | ||
468 | for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++) { | |
469 | if (chctl->flags[ch_number] & XPC_OPENCLOSE_CHCTL_FLAGS) | |
470 | return 1; | |
471 | } | |
472 | return 0; | |
473 | } | |
474 | ||
475 | static inline int | |
476 | xpc_any_msg_chctl_flags_set(union xpc_channel_ctl_flags *chctl) | |
477 | { | |
478 | int ch_number; | |
479 | ||
480 | for (ch_number = 0; ch_number < XPC_MAX_NCHANNELS; ch_number++) { | |
481 | if (chctl->flags[ch_number] & XPC_MSG_CHCTL_FLAGS) | |
482 | return 1; | |
483 | } | |
484 | return 0; | |
485 | } | |
486 | ||
89eb8eb9 | 487 | /* |
ea57f80c | 488 | * Manage channels on a partition basis. There is one of these structures |
89eb8eb9 DN |
489 | * for each partition (a partition will never utilize the structure that |
490 | * represents itself). | |
491 | */ | |
a47d5dac DN |
492 | |
493 | struct xpc_partition_sn2 { | |
a812dcc3 | 494 | unsigned long remote_amos_page_pa; /* paddr of partition's amos page */ |
a47d5dac DN |
495 | int activate_IRQ_nasid; /* active partition's act/deact nasid */ |
496 | int activate_IRQ_phys_cpuid; /* active part's act/deact phys cpuid */ | |
497 | ||
a812dcc3 DN |
498 | unsigned long remote_vars_pa; /* phys addr of partition's vars */ |
499 | unsigned long remote_vars_part_pa; /* paddr of partition's vars part */ | |
a47d5dac DN |
500 | u8 remote_vars_version; /* version# of partition's vars */ |
501 | ||
502 | void *local_GPs_base; /* base address of kmalloc'd space */ | |
261f3b49 | 503 | struct xpc_gp_sn2 *local_GPs; /* local Get/Put values */ |
a47d5dac | 504 | void *remote_GPs_base; /* base address of kmalloc'd space */ |
261f3b49 | 505 | struct xpc_gp_sn2 *remote_GPs; /* copy of remote partition's local */ |
a47d5dac | 506 | /* Get/Put values */ |
a812dcc3 DN |
507 | unsigned long remote_GPs_pa; /* phys addr of remote partition's local */ |
508 | /* Get/Put values */ | |
a47d5dac | 509 | |
a812dcc3 | 510 | unsigned long remote_openclose_args_pa; /* phys addr of remote's args */ |
a47d5dac | 511 | |
7fb5e59d DN |
512 | int notify_IRQ_nasid; /* nasid of where to send notify IRQs */ |
513 | int notify_IRQ_phys_cpuid; /* CPUID of where to send notify IRQs */ | |
514 | char notify_IRQ_owner[8]; /* notify IRQ's owner's name */ | |
a47d5dac | 515 | |
c39838ce DN |
516 | struct amo *remote_chctl_amo_va; /* addr of remote chctl flags' amo */ |
517 | struct amo *local_chctl_amo_va; /* address of chctl flags' amo */ | |
a47d5dac DN |
518 | |
519 | struct timer_list dropped_notify_IRQ_timer; /* dropped IRQ timer */ | |
520 | }; | |
521 | ||
522 | struct xpc_partition_uv { | |
ea57f80c | 523 | /* !!! code is coming */ |
a47d5dac DN |
524 | }; |
525 | ||
89eb8eb9 DN |
526 | struct xpc_partition { |
527 | ||
528 | /* XPC HB infrastructure */ | |
529 | ||
4a3ad2dd | 530 | u8 remote_rp_version; /* version# of partition's rsvd pg */ |
81fe7883 | 531 | unsigned long remote_rp_ts_jiffies; /* timestamp when rsvd pg setup */ |
a812dcc3 | 532 | unsigned long remote_rp_pa; /* phys addr of partition's rsvd pg */ |
4a3ad2dd | 533 | u64 last_heartbeat; /* HB at last read */ |
6e41017a | 534 | u32 activate_IRQ_rcvd; /* IRQs since activation */ |
4a3ad2dd DN |
535 | spinlock_t act_lock; /* protect updating of act_state */ |
536 | u8 act_state; /* from XPC HB viewpoint */ | |
65c17b80 | 537 | enum xp_retval reason; /* reason partition is deactivating */ |
4a3ad2dd | 538 | int reason_line; /* line# deactivation initiated from */ |
4a3ad2dd | 539 | |
a47d5dac DN |
540 | unsigned long disengage_timeout; /* timeout in jiffies */ |
541 | struct timer_list disengage_timer; | |
a607c389 | 542 | |
89eb8eb9 DN |
543 | /* XPC infrastructure referencing and teardown control */ |
544 | ||
2c2b94f9 | 545 | u8 setup_state; /* infrastructure setup state */ |
89eb8eb9 | 546 | wait_queue_head_t teardown_wq; /* kthread waiting to teardown infra */ |
4a3ad2dd | 547 | atomic_t references; /* #of references to infrastructure */ |
89eb8eb9 | 548 | |
4a3ad2dd | 549 | u8 nchannels; /* #of defined channels supported */ |
2c2b94f9 DN |
550 | atomic_t nchannels_active; /* #of channels that are not DISCONNECTED */ |
551 | atomic_t nchannels_engaged; /* #of channels engaged with remote part */ | |
4a3ad2dd DN |
552 | struct xpc_channel *channels; /* array of channel structures */ |
553 | ||
7fb5e59d DN |
554 | /* fields used for managing channel avialability and activity */ |
555 | ||
556 | union xpc_channel_ctl_flags chctl; /* chctl flags yet to be processed */ | |
557 | spinlock_t chctl_lock; /* chctl flags lock */ | |
89eb8eb9 | 558 | |
2c2b94f9 DN |
559 | void *local_openclose_args_base; /* base address of kmalloc'd space */ |
560 | struct xpc_openclose_args *local_openclose_args; /* local's args */ | |
561 | void *remote_openclose_args_base; /* base address of kmalloc'd space */ | |
562 | struct xpc_openclose_args *remote_openclose_args; /* copy of remote's */ | |
563 | /* args */ | |
89eb8eb9 | 564 | |
89eb8eb9 DN |
565 | /* channel manager related fields */ |
566 | ||
567 | atomic_t channel_mgr_requests; /* #of requests to activate chan mgr */ | |
4a3ad2dd | 568 | wait_queue_head_t channel_mgr_wq; /* channel mgr's wait queue */ |
89eb8eb9 | 569 | |
a47d5dac DN |
570 | union { |
571 | struct xpc_partition_sn2 sn2; | |
572 | struct xpc_partition_uv uv; | |
573 | } sn; | |
574 | ||
89eb8eb9 DN |
575 | } ____cacheline_aligned; |
576 | ||
89eb8eb9 DN |
577 | /* struct xpc_partition act_state values (for XPC HB) */ |
578 | ||
579 | #define XPC_P_INACTIVE 0x00 /* partition is not active */ | |
580 | #define XPC_P_ACTIVATION_REQ 0x01 /* created thread to activate */ | |
581 | #define XPC_P_ACTIVATING 0x02 /* activation thread started */ | |
582 | #define XPC_P_ACTIVE 0x03 /* xpc_partition_up() was called */ | |
583 | #define XPC_P_DEACTIVATING 0x04 /* partition deactivation initiated */ | |
584 | ||
89eb8eb9 DN |
585 | #define XPC_DEACTIVATE_PARTITION(_p, _reason) \ |
586 | xpc_deactivate_partition(__LINE__, (_p), (_reason)) | |
587 | ||
89eb8eb9 DN |
588 | /* struct xpc_partition setup_state values */ |
589 | ||
590 | #define XPC_P_UNSET 0x00 /* infrastructure was never setup */ | |
591 | #define XPC_P_SETUP 0x01 /* infrastructure is setup */ | |
592 | #define XPC_P_WTEARDOWN 0x02 /* waiting to teardown infrastructure */ | |
593 | #define XPC_P_TORNDOWN 0x03 /* infrastructure is torndown */ | |
594 | ||
89eb8eb9 | 595 | /* |
7fb5e59d DN |
596 | * struct xpc_partition_sn2's dropped notify IRQ timer is set to wait the |
597 | * following interval #of seconds before checking for dropped notify IRQs. | |
598 | * These can occur whenever an IRQ's associated amo write doesn't complete | |
599 | * until after the IRQ was received. | |
89eb8eb9 | 600 | */ |
7fb5e59d | 601 | #define XPC_DROPPED_NOTIFY_IRQ_WAIT_INTERVAL (0.25 * HZ) |
89eb8eb9 | 602 | |
a607c389 | 603 | /* number of seconds to wait for other partitions to disengage */ |
a47d5dac | 604 | #define XPC_DISENGAGE_DEFAULT_TIMELIMIT 90 |
a607c389 | 605 | |
a47d5dac DN |
606 | /* interval in seconds to print 'waiting deactivation' messages */ |
607 | #define XPC_DEACTIVATE_PRINTMSG_INTERVAL 10 | |
a607c389 | 608 | |
64d032ba | 609 | #define XPC_PARTID(_p) ((short)((_p) - &xpc_partitions[0])) |
89eb8eb9 | 610 | |
89eb8eb9 DN |
611 | /* found in xp_main.c */ |
612 | extern struct xpc_registration xpc_registrations[]; | |
613 | ||
e54af724 | 614 | /* found in xpc_main.c */ |
89eb8eb9 DN |
615 | extern struct device *xpc_part; |
616 | extern struct device *xpc_chan; | |
a47d5dac DN |
617 | extern int xpc_disengage_timelimit; |
618 | extern int xpc_disengage_timedout; | |
6e41017a DN |
619 | extern atomic_t xpc_activate_IRQ_rcvd; |
620 | extern wait_queue_head_t xpc_activate_IRQ_wq; | |
33ba3c77 | 621 | extern void *xpc_heartbeating_to_mask; |
e54af724 | 622 | extern void xpc_activate_partition(struct xpc_partition *); |
89eb8eb9 | 623 | extern void xpc_activate_kthreads(struct xpc_channel *, int); |
a460ef8d | 624 | extern void xpc_create_kthreads(struct xpc_channel *, int, int); |
89eb8eb9 | 625 | extern void xpc_disconnect_wait(int); |
a812dcc3 DN |
626 | extern enum xp_retval (*xpc_get_partition_rsvd_page_pa) (void *, u64 *, |
627 | unsigned long *, | |
261f3b49 | 628 | size_t *); |
94bd2708 | 629 | extern enum xp_retval (*xpc_rsvd_page_init) (struct xpc_rsvd_page *); |
33ba3c77 DN |
630 | extern void (*xpc_heartbeat_init) (void); |
631 | extern void (*xpc_heartbeat_exit) (void); | |
632 | extern void (*xpc_increment_heartbeat) (void); | |
633 | extern void (*xpc_offline_heartbeat) (void); | |
634 | extern void (*xpc_online_heartbeat) (void); | |
635 | extern void (*xpc_check_remote_hb) (void); | |
e17d416b | 636 | extern enum xp_retval (*xpc_make_first_contact) (struct xpc_partition *); |
7fb5e59d | 637 | extern u64 (*xpc_get_chctl_all_flags) (struct xpc_partition *); |
185c3a1b DN |
638 | extern enum xp_retval (*xpc_allocate_msgqueues) (struct xpc_channel *); |
639 | extern void (*xpc_free_msgqueues) (struct xpc_channel *); | |
a47d5dac | 640 | extern void (*xpc_notify_senders_of_disconnect) (struct xpc_channel *); |
7fb5e59d | 641 | extern void (*xpc_process_msg_chctl_flags) (struct xpc_partition *, int); |
a47d5dac | 642 | extern int (*xpc_n_of_deliverable_msgs) (struct xpc_channel *); |
e17d416b | 643 | extern struct xpc_msg *(*xpc_get_deliverable_msg) (struct xpc_channel *); |
a812dcc3 DN |
644 | extern void (*xpc_request_partition_activation) (struct xpc_rsvd_page *, |
645 | unsigned long, int); | |
a47d5dac DN |
646 | extern void (*xpc_request_partition_reactivation) (struct xpc_partition *); |
647 | extern void (*xpc_request_partition_deactivation) (struct xpc_partition *); | |
648 | extern void (*xpc_cancel_partition_deactivation_request) ( | |
649 | struct xpc_partition *); | |
6e41017a | 650 | extern void (*xpc_process_activate_IRQ_rcvd) (int); |
e17d416b DN |
651 | extern enum xp_retval (*xpc_setup_infrastructure) (struct xpc_partition *); |
652 | extern void (*xpc_teardown_infrastructure) (struct xpc_partition *); | |
a47d5dac DN |
653 | |
654 | extern void (*xpc_indicate_partition_engaged) (struct xpc_partition *); | |
655 | extern int (*xpc_partition_engaged) (short); | |
656 | extern int (*xpc_any_partition_engaged) (void); | |
657 | extern void (*xpc_indicate_partition_disengaged) (struct xpc_partition *); | |
658 | extern void (*xpc_assume_partition_disengaged) (short); | |
659 | ||
7fb5e59d | 660 | extern void (*xpc_send_chctl_closerequest) (struct xpc_channel *, |
a47d5dac | 661 | unsigned long *); |
7fb5e59d DN |
662 | extern void (*xpc_send_chctl_closereply) (struct xpc_channel *, |
663 | unsigned long *); | |
664 | extern void (*xpc_send_chctl_openrequest) (struct xpc_channel *, | |
a47d5dac | 665 | unsigned long *); |
7fb5e59d | 666 | extern void (*xpc_send_chctl_openreply) (struct xpc_channel *, unsigned long *); |
33ba3c77 | 667 | |
97bf1aa1 | 668 | extern enum xp_retval (*xpc_send_msg) (struct xpc_channel *, u32, void *, u16, |
33ba3c77 DN |
669 | u8, xpc_notify_func, void *); |
670 | extern void (*xpc_received_msg) (struct xpc_channel *, struct xpc_msg *); | |
94bd2708 DN |
671 | |
672 | /* found in xpc_sn2.c */ | |
6e41017a DN |
673 | extern int xpc_init_sn2(void); |
674 | extern void xpc_exit_sn2(void); | |
94bd2708 DN |
675 | |
676 | /* found in xpc_uv.c */ | |
677 | extern void xpc_init_uv(void); | |
6e41017a | 678 | extern void xpc_exit_uv(void); |
94bd2708 | 679 | |
89eb8eb9 DN |
680 | /* found in xpc_partition.c */ |
681 | extern int xpc_exiting; | |
04de7418 | 682 | extern int xpc_nasid_mask_nlongs; |
89eb8eb9 | 683 | extern struct xpc_rsvd_page *xpc_rsvd_page; |
04de7418 | 684 | extern unsigned long *xpc_mach_nasids; |
bc63d387 | 685 | extern struct xpc_partition *xpc_partitions; |
7682a4c6 | 686 | extern void *xpc_kmalloc_cacheline_aligned(size_t, gfp_t, void **); |
94bd2708 | 687 | extern struct xpc_rsvd_page *xpc_setup_rsvd_page(void); |
6e41017a | 688 | extern int xpc_identify_activate_IRQ_sender(void); |
a607c389 | 689 | extern int xpc_partition_disengaged(struct xpc_partition *); |
65c17b80 | 690 | extern enum xp_retval xpc_mark_partition_active(struct xpc_partition *); |
89eb8eb9 DN |
691 | extern void xpc_mark_partition_inactive(struct xpc_partition *); |
692 | extern void xpc_discovery(void); | |
04de7418 | 693 | extern enum xp_retval xpc_get_remote_rp(int, unsigned long *, |
a812dcc3 DN |
694 | struct xpc_rsvd_page *, |
695 | unsigned long *); | |
89eb8eb9 | 696 | extern void xpc_deactivate_partition(const int, struct xpc_partition *, |
65c17b80 | 697 | enum xp_retval); |
64d032ba | 698 | extern enum xp_retval xpc_initiate_partid_to_nasids(short, void *); |
89eb8eb9 | 699 | |
89eb8eb9 DN |
700 | /* found in xpc_channel.c */ |
701 | extern void xpc_initiate_connect(int); | |
702 | extern void xpc_initiate_disconnect(int); | |
33ba3c77 | 703 | extern enum xp_retval xpc_allocate_msg_wait(struct xpc_channel *); |
97bf1aa1 DN |
704 | extern enum xp_retval xpc_initiate_send(short, int, u32, void *, u16); |
705 | extern enum xp_retval xpc_initiate_send_notify(short, int, u32, void *, u16, | |
65c17b80 | 706 | xpc_notify_func, void *); |
64d032ba | 707 | extern void xpc_initiate_received(short, int, void *); |
7fb5e59d | 708 | extern void xpc_process_sent_chctl_flags(struct xpc_partition *); |
89eb8eb9 DN |
709 | extern void xpc_connected_callout(struct xpc_channel *); |
710 | extern void xpc_deliver_msg(struct xpc_channel *); | |
711 | extern void xpc_disconnect_channel(const int, struct xpc_channel *, | |
65c17b80 DN |
712 | enum xp_retval, unsigned long *); |
713 | extern void xpc_disconnect_callout(struct xpc_channel *, enum xp_retval); | |
714 | extern void xpc_partition_going_down(struct xpc_partition *, enum xp_retval); | |
89eb8eb9 | 715 | |
33ba3c77 DN |
716 | static inline int |
717 | xpc_hb_allowed(short partid, void *heartbeating_to_mask) | |
718 | { | |
719 | return test_bit(partid, heartbeating_to_mask); | |
720 | } | |
721 | ||
722 | static inline int | |
723 | xpc_any_hbs_allowed(void) | |
724 | { | |
725 | DBUG_ON(xpc_heartbeating_to_mask == NULL); | |
726 | return !bitmap_empty(xpc_heartbeating_to_mask, xp_max_npartitions); | |
727 | } | |
728 | ||
729 | static inline void | |
730 | xpc_allow_hb(short partid) | |
731 | { | |
732 | DBUG_ON(xpc_heartbeating_to_mask == NULL); | |
733 | set_bit(partid, xpc_heartbeating_to_mask); | |
734 | } | |
735 | ||
736 | static inline void | |
737 | xpc_disallow_hb(short partid) | |
738 | { | |
739 | DBUG_ON(xpc_heartbeating_to_mask == NULL); | |
740 | clear_bit(partid, xpc_heartbeating_to_mask); | |
741 | } | |
742 | ||
743 | static inline void | |
744 | xpc_disallow_all_hbs(void) | |
745 | { | |
746 | DBUG_ON(xpc_heartbeating_to_mask == NULL); | |
747 | bitmap_zero(xpc_heartbeating_to_mask, xp_max_npartitions); | |
748 | } | |
749 | ||
89eb8eb9 DN |
750 | static inline void |
751 | xpc_wakeup_channel_mgr(struct xpc_partition *part) | |
752 | { | |
2c2b94f9 | 753 | if (atomic_inc_return(&part->channel_mgr_requests) == 1) |
89eb8eb9 | 754 | wake_up(&part->channel_mgr_wq); |
89eb8eb9 DN |
755 | } |
756 | ||
89eb8eb9 DN |
757 | /* |
758 | * These next two inlines are used to keep us from tearing down a channel's | |
759 | * msg queues while a thread may be referencing them. | |
760 | */ | |
761 | static inline void | |
762 | xpc_msgqueue_ref(struct xpc_channel *ch) | |
763 | { | |
764 | atomic_inc(&ch->references); | |
765 | } | |
766 | ||
767 | static inline void | |
768 | xpc_msgqueue_deref(struct xpc_channel *ch) | |
769 | { | |
770 | s32 refs = atomic_dec_return(&ch->references); | |
771 | ||
772 | DBUG_ON(refs < 0); | |
2c2b94f9 | 773 | if (refs == 0) |
89eb8eb9 | 774 | xpc_wakeup_channel_mgr(&xpc_partitions[ch->partid]); |
89eb8eb9 DN |
775 | } |
776 | ||
89eb8eb9 DN |
777 | #define XPC_DISCONNECT_CHANNEL(_ch, _reason, _irqflgs) \ |
778 | xpc_disconnect_channel(__LINE__, _ch, _reason, _irqflgs) | |
779 | ||
89eb8eb9 DN |
780 | /* |
781 | * These two inlines are used to keep us from tearing down a partition's | |
782 | * setup infrastructure while a thread may be referencing it. | |
783 | */ | |
784 | static inline void | |
785 | xpc_part_deref(struct xpc_partition *part) | |
786 | { | |
787 | s32 refs = atomic_dec_return(&part->references); | |
788 | ||
89eb8eb9 | 789 | DBUG_ON(refs < 0); |
2c2b94f9 | 790 | if (refs == 0 && part->setup_state == XPC_P_WTEARDOWN) |
89eb8eb9 | 791 | wake_up(&part->teardown_wq); |
89eb8eb9 DN |
792 | } |
793 | ||
794 | static inline int | |
795 | xpc_part_ref(struct xpc_partition *part) | |
796 | { | |
797 | int setup; | |
798 | ||
89eb8eb9 DN |
799 | atomic_inc(&part->references); |
800 | setup = (part->setup_state == XPC_P_SETUP); | |
2c2b94f9 | 801 | if (!setup) |
89eb8eb9 | 802 | xpc_part_deref(part); |
2c2b94f9 | 803 | |
89eb8eb9 DN |
804 | return setup; |
805 | } | |
806 | ||
89eb8eb9 DN |
807 | /* |
808 | * The following macro is to be used for the setting of the reason and | |
809 | * reason_line fields in both the struct xpc_channel and struct xpc_partition | |
810 | * structures. | |
811 | */ | |
812 | #define XPC_SET_REASON(_p, _reason, _line) \ | |
813 | { \ | |
814 | (_p)->reason = _reason; \ | |
815 | (_p)->reason_line = _line; \ | |
816 | } | |
817 | ||
45d9ca49 | 818 | #endif /* _DRIVERS_MISC_SGIXP_XPC_H */ |