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Commit | Line | Data |
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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) partition support. | |
11 | * | |
12 | * This is the part of XPC that detects the presence/absence of | |
13 | * other partitions. It provides a heartbeat and monitors the | |
14 | * heartbeats of other partitions. | |
15 | * | |
16 | */ | |
17 | ||
261f3b49 DN |
18 | #include <linux/device.h> |
19 | #include <linux/hardirq.h> | |
45d9ca49 | 20 | #include "xpc.h" |
89eb8eb9 | 21 | |
89eb8eb9 DN |
22 | /* XPC is exiting flag */ |
23 | int xpc_exiting; | |
24 | ||
4b38fcd4 | 25 | /* this partition's reserved page pointers */ |
89eb8eb9 | 26 | struct xpc_rsvd_page *xpc_rsvd_page; |
04de7418 DN |
27 | static unsigned long *xpc_part_nasids; |
28 | unsigned long *xpc_mach_nasids; | |
89eb8eb9 | 29 | |
04de7418 DN |
30 | static int xpc_nasid_mask_nbytes; /* #of bytes in nasid mask */ |
31 | int xpc_nasid_mask_nlongs; /* #of longs in nasid mask */ | |
4b38fcd4 | 32 | |
bc63d387 | 33 | struct xpc_partition *xpc_partitions; |
89eb8eb9 | 34 | |
7aa6ba41 JS |
35 | /* |
36 | * Guarantee that the kmalloc'd memory is cacheline aligned. | |
37 | */ | |
7682a4c6 | 38 | void * |
7aa6ba41 JS |
39 | xpc_kmalloc_cacheline_aligned(size_t size, gfp_t flags, void **base) |
40 | { | |
41 | /* see if kmalloc will give us cachline aligned memory by default */ | |
42 | *base = kmalloc(size, flags); | |
2c2b94f9 | 43 | if (*base == NULL) |
7aa6ba41 | 44 | return NULL; |
2c2b94f9 DN |
45 | |
46 | if ((u64)*base == L1_CACHE_ALIGN((u64)*base)) | |
7aa6ba41 | 47 | return *base; |
2c2b94f9 | 48 | |
7aa6ba41 JS |
49 | kfree(*base); |
50 | ||
51 | /* nope, we'll have to do it ourselves */ | |
52 | *base = kmalloc(size + L1_CACHE_BYTES, flags); | |
2c2b94f9 | 53 | if (*base == NULL) |
7aa6ba41 | 54 | return NULL; |
2c2b94f9 | 55 | |
4a3ad2dd | 56 | return (void *)L1_CACHE_ALIGN((u64)*base); |
7aa6ba41 JS |
57 | } |
58 | ||
89eb8eb9 DN |
59 | /* |
60 | * Given a nasid, get the physical address of the partition's reserved page | |
61 | * for that nasid. This function returns 0 on any error. | |
62 | */ | |
a812dcc3 | 63 | static unsigned long |
27929029 | 64 | xpc_get_rsvd_page_pa(int nasid) |
89eb8eb9 | 65 | { |
908787db | 66 | enum xp_retval ret; |
89eb8eb9 | 67 | u64 cookie = 0; |
a812dcc3 | 68 | unsigned long rp_pa = nasid; /* seed with nasid */ |
261f3b49 | 69 | size_t len = 0; |
a812dcc3 DN |
70 | size_t buf_len = 0; |
71 | void *buf = buf; | |
27929029 | 72 | void *buf_base = NULL; |
a7665b0a RH |
73 | enum xp_retval (*get_partition_rsvd_page_pa) |
74 | (void *, u64 *, unsigned long *, size_t *) = | |
75 | xpc_arch_ops.get_partition_rsvd_page_pa; | |
89eb8eb9 | 76 | |
89eb8eb9 DN |
77 | while (1) { |
78 | ||
5b8669df DN |
79 | /* !!! rp_pa will need to be _gpa on UV. |
80 | * ??? So do we save it into the architecture specific parts | |
81 | * ??? of the xpc_partition structure? Do we rename this | |
82 | * ??? function or have two versions? Rename rp_pa for UV to | |
83 | * ??? rp_gpa? | |
84 | */ | |
a7665b0a | 85 | ret = get_partition_rsvd_page_pa(buf, &cookie, &rp_pa, &len); |
89eb8eb9 | 86 | |
261f3b49 DN |
87 | dev_dbg(xpc_part, "SAL returned with ret=%d, cookie=0x%016lx, " |
88 | "address=0x%016lx, len=0x%016lx\n", ret, | |
a812dcc3 | 89 | (unsigned long)cookie, rp_pa, len); |
89eb8eb9 | 90 | |
261f3b49 | 91 | if (ret != xpNeedMoreInfo) |
89eb8eb9 | 92 | break; |
89eb8eb9 | 93 | |
ea57f80c | 94 | /* !!! L1_CACHE_ALIGN() is only a sn2-bte_copy requirement */ |
27929029 | 95 | if (L1_CACHE_ALIGN(len) > buf_len) { |
cbf283c0 | 96 | kfree(buf_base); |
27929029 | 97 | buf_len = L1_CACHE_ALIGN(len); |
a812dcc3 DN |
98 | buf = xpc_kmalloc_cacheline_aligned(buf_len, GFP_KERNEL, |
99 | &buf_base); | |
27929029 DN |
100 | if (buf_base == NULL) { |
101 | dev_err(xpc_part, "unable to kmalloc " | |
a812dcc3 | 102 | "len=0x%016lx\n", buf_len); |
261f3b49 | 103 | ret = xpNoMemory; |
27929029 DN |
104 | break; |
105 | } | |
89eb8eb9 DN |
106 | } |
107 | ||
a812dcc3 | 108 | ret = xp_remote_memcpy(xp_pa(buf), rp_pa, buf_len); |
908787db DN |
109 | if (ret != xpSuccess) { |
110 | dev_dbg(xpc_part, "xp_remote_memcpy failed %d\n", ret); | |
89eb8eb9 DN |
111 | break; |
112 | } | |
113 | } | |
114 | ||
cbf283c0 | 115 | kfree(buf_base); |
27929029 | 116 | |
261f3b49 | 117 | if (ret != xpSuccess) |
89eb8eb9 | 118 | rp_pa = 0; |
2c2b94f9 | 119 | |
a812dcc3 | 120 | dev_dbg(xpc_part, "reserved page at phys address 0x%016lx\n", rp_pa); |
89eb8eb9 DN |
121 | return rp_pa; |
122 | } | |
123 | ||
89eb8eb9 DN |
124 | /* |
125 | * Fill the partition reserved page with the information needed by | |
126 | * other partitions to discover we are alive and establish initial | |
127 | * communications. | |
128 | */ | |
5b8669df | 129 | int |
94bd2708 | 130 | xpc_setup_rsvd_page(void) |
89eb8eb9 | 131 | { |
5b8669df | 132 | int ret; |
89eb8eb9 | 133 | struct xpc_rsvd_page *rp; |
a812dcc3 | 134 | unsigned long rp_pa; |
81fe7883 | 135 | unsigned long new_ts_jiffies; |
89eb8eb9 | 136 | |
89eb8eb9 DN |
137 | /* get the local reserved page's address */ |
138 | ||
27929029 | 139 | preempt_disable(); |
261f3b49 | 140 | rp_pa = xpc_get_rsvd_page_pa(xp_cpu_to_nasid(smp_processor_id())); |
27929029 | 141 | preempt_enable(); |
89eb8eb9 DN |
142 | if (rp_pa == 0) { |
143 | dev_err(xpc_part, "SAL failed to locate the reserved page\n"); | |
5b8669df | 144 | return -ESRCH; |
89eb8eb9 | 145 | } |
4a3ad2dd | 146 | rp = (struct xpc_rsvd_page *)__va(rp_pa); |
89eb8eb9 | 147 | |
94bd2708 DN |
148 | if (rp->SAL_version < 3) { |
149 | /* SAL_versions < 3 had a SAL_partid defined as a u8 */ | |
150 | rp->SAL_partid &= 0xff; | |
151 | } | |
261f3b49 | 152 | BUG_ON(rp->SAL_partid != xp_partition_id); |
94bd2708 DN |
153 | |
154 | if (rp->SAL_partid < 0 || rp->SAL_partid >= xp_max_npartitions) { | |
155 | dev_err(xpc_part, "the reserved page's partid of %d is outside " | |
156 | "supported range (< 0 || >= %d)\n", rp->SAL_partid, | |
157 | xp_max_npartitions); | |
5b8669df | 158 | return -EINVAL; |
89eb8eb9 DN |
159 | } |
160 | ||
161 | rp->version = XPC_RP_VERSION; | |
94bd2708 | 162 | rp->max_npartitions = xp_max_npartitions; |
89eb8eb9 | 163 | |
4b38fcd4 DN |
164 | /* establish the actual sizes of the nasid masks */ |
165 | if (rp->SAL_version == 1) { | |
166 | /* SAL_version 1 didn't set the nasids_size field */ | |
94bd2708 | 167 | rp->SAL_nasids_size = 128; |
4b38fcd4 | 168 | } |
04de7418 DN |
169 | xpc_nasid_mask_nbytes = rp->SAL_nasids_size; |
170 | xpc_nasid_mask_nlongs = BITS_TO_LONGS(rp->SAL_nasids_size * | |
171 | BITS_PER_BYTE); | |
4b38fcd4 DN |
172 | |
173 | /* setup the pointers to the various items in the reserved page */ | |
174 | xpc_part_nasids = XPC_RP_PART_NASIDS(rp); | |
175 | xpc_mach_nasids = XPC_RP_MACH_NASIDS(rp); | |
89eb8eb9 | 176 | |
a7665b0a | 177 | ret = xpc_arch_ops.setup_rsvd_page(rp); |
5b8669df DN |
178 | if (ret != 0) |
179 | return ret; | |
89eb8eb9 DN |
180 | |
181 | /* | |
94bd2708 | 182 | * Set timestamp of when reserved page was setup by XPC. |
89eb8eb9 DN |
183 | * This signifies to the remote partition that our reserved |
184 | * page is initialized. | |
185 | */ | |
81fe7883 DN |
186 | new_ts_jiffies = jiffies; |
187 | if (new_ts_jiffies == 0 || new_ts_jiffies == rp->ts_jiffies) | |
188 | new_ts_jiffies++; | |
189 | rp->ts_jiffies = new_ts_jiffies; | |
89eb8eb9 | 190 | |
5b8669df DN |
191 | xpc_rsvd_page = rp; |
192 | return 0; | |
193 | } | |
194 | ||
195 | void | |
196 | xpc_teardown_rsvd_page(void) | |
197 | { | |
198 | /* a zero timestamp indicates our rsvd page is not initialized */ | |
199 | xpc_rsvd_page->ts_jiffies = 0; | |
89eb8eb9 DN |
200 | } |
201 | ||
89eb8eb9 | 202 | /* |
4b38fcd4 | 203 | * Get a copy of a portion of the remote partition's rsvd page. |
89eb8eb9 DN |
204 | * |
205 | * remote_rp points to a buffer that is cacheline aligned for BTE copies and | |
4b38fcd4 DN |
206 | * is large enough to contain a copy of their reserved page header and |
207 | * part_nasids mask. | |
89eb8eb9 | 208 | */ |
33ba3c77 | 209 | enum xp_retval |
04de7418 | 210 | xpc_get_remote_rp(int nasid, unsigned long *discovered_nasids, |
a812dcc3 | 211 | struct xpc_rsvd_page *remote_rp, unsigned long *remote_rp_pa) |
89eb8eb9 | 212 | { |
04de7418 | 213 | int l; |
908787db | 214 | enum xp_retval ret; |
89eb8eb9 | 215 | |
89eb8eb9 DN |
216 | /* get the reserved page's physical address */ |
217 | ||
27929029 | 218 | *remote_rp_pa = xpc_get_rsvd_page_pa(nasid); |
2c2b94f9 | 219 | if (*remote_rp_pa == 0) |
65c17b80 | 220 | return xpNoRsvdPageAddr; |
89eb8eb9 | 221 | |
4b38fcd4 | 222 | /* pull over the reserved page header and part_nasids mask */ |
a812dcc3 | 223 | ret = xp_remote_memcpy(xp_pa(remote_rp), *remote_rp_pa, |
04de7418 | 224 | XPC_RP_HEADER_SIZE + xpc_nasid_mask_nbytes); |
908787db DN |
225 | if (ret != xpSuccess) |
226 | return ret; | |
89eb8eb9 | 227 | |
89eb8eb9 | 228 | if (discovered_nasids != NULL) { |
04de7418 DN |
229 | unsigned long *remote_part_nasids = |
230 | XPC_RP_PART_NASIDS(remote_rp); | |
4b38fcd4 | 231 | |
04de7418 DN |
232 | for (l = 0; l < xpc_nasid_mask_nlongs; l++) |
233 | discovered_nasids[l] |= remote_part_nasids[l]; | |
89eb8eb9 DN |
234 | } |
235 | ||
81fe7883 DN |
236 | /* zero timestamp indicates the reserved page has not been setup */ |
237 | if (remote_rp->ts_jiffies == 0) | |
94bd2708 DN |
238 | return xpRsvdPageNotSet; |
239 | ||
89eb8eb9 | 240 | if (XPC_VERSION_MAJOR(remote_rp->version) != |
4a3ad2dd | 241 | XPC_VERSION_MAJOR(XPC_RP_VERSION)) { |
65c17b80 | 242 | return xpBadVersion; |
89eb8eb9 DN |
243 | } |
244 | ||
a47d5dac | 245 | /* check that both remote and local partids are valid for each side */ |
aaa3cd69 DN |
246 | if (remote_rp->SAL_partid < 0 || |
247 | remote_rp->SAL_partid >= xp_max_npartitions || | |
261f3b49 | 248 | remote_rp->max_npartitions <= xp_partition_id) { |
94bd2708 | 249 | return xpInvalidPartid; |
aaa3cd69 DN |
250 | } |
251 | ||
261f3b49 | 252 | if (remote_rp->SAL_partid == xp_partition_id) |
aaa3cd69 | 253 | return xpLocalPartid; |
94bd2708 | 254 | |
65c17b80 | 255 | return xpSuccess; |
89eb8eb9 DN |
256 | } |
257 | ||
a607c389 | 258 | /* |
a47d5dac DN |
259 | * See if the other side has responded to a partition deactivate request |
260 | * from us. Though we requested the remote partition to deactivate with regard | |
261 | * to us, we really only need to wait for the other side to disengage from us. | |
a607c389 DN |
262 | */ |
263 | int | |
264 | xpc_partition_disengaged(struct xpc_partition *part) | |
265 | { | |
64d032ba | 266 | short partid = XPC_PARTID(part); |
a607c389 DN |
267 | int disengaged; |
268 | ||
a7665b0a | 269 | disengaged = !xpc_arch_ops.partition_engaged(partid); |
a47d5dac | 270 | if (part->disengage_timeout) { |
a607c389 | 271 | if (!disengaged) { |
a47d5dac | 272 | if (time_is_after_jiffies(part->disengage_timeout)) { |
a607c389 DN |
273 | /* timelimit hasn't been reached yet */ |
274 | return 0; | |
275 | } | |
276 | ||
277 | /* | |
a47d5dac | 278 | * Other side hasn't responded to our deactivate |
a607c389 DN |
279 | * request in a timely fashion, so assume it's dead. |
280 | */ | |
281 | ||
a47d5dac DN |
282 | dev_info(xpc_part, "deactivate request to remote " |
283 | "partition %d timed out\n", partid); | |
284 | xpc_disengage_timedout = 1; | |
a7665b0a | 285 | xpc_arch_ops.assume_partition_disengaged(partid); |
a607c389 DN |
286 | disengaged = 1; |
287 | } | |
a47d5dac | 288 | part->disengage_timeout = 0; |
a607c389 DN |
289 | |
290 | /* cancel the timer function, provided it's not us */ | |
a47d5dac DN |
291 | if (!in_interrupt()) |
292 | del_singleshot_timer_sync(&part->disengage_timer); | |
a607c389 | 293 | |
83469b55 DN |
294 | DBUG_ON(part->act_state != XPC_P_AS_DEACTIVATING && |
295 | part->act_state != XPC_P_AS_INACTIVE); | |
296 | if (part->act_state != XPC_P_AS_INACTIVE) | |
a607c389 | 297 | xpc_wakeup_channel_mgr(part); |
a607c389 | 298 | |
a7665b0a | 299 | xpc_arch_ops.cancel_partition_deactivation_request(part); |
a607c389 DN |
300 | } |
301 | return disengaged; | |
302 | } | |
303 | ||
89eb8eb9 DN |
304 | /* |
305 | * Mark specified partition as active. | |
306 | */ | |
65c17b80 | 307 | enum xp_retval |
89eb8eb9 DN |
308 | xpc_mark_partition_active(struct xpc_partition *part) |
309 | { | |
310 | unsigned long irq_flags; | |
65c17b80 | 311 | enum xp_retval ret; |
89eb8eb9 | 312 | |
89eb8eb9 DN |
313 | dev_dbg(xpc_part, "setting partition %d to ACTIVE\n", XPC_PARTID(part)); |
314 | ||
315 | spin_lock_irqsave(&part->act_lock, irq_flags); | |
83469b55 DN |
316 | if (part->act_state == XPC_P_AS_ACTIVATING) { |
317 | part->act_state = XPC_P_AS_ACTIVE; | |
65c17b80 | 318 | ret = xpSuccess; |
89eb8eb9 | 319 | } else { |
65c17b80 | 320 | DBUG_ON(part->reason == xpSuccess); |
89eb8eb9 DN |
321 | ret = part->reason; |
322 | } | |
323 | spin_unlock_irqrestore(&part->act_lock, irq_flags); | |
324 | ||
325 | return ret; | |
326 | } | |
327 | ||
89eb8eb9 | 328 | /* |
a47d5dac | 329 | * Start the process of deactivating the specified partition. |
89eb8eb9 DN |
330 | */ |
331 | void | |
332 | xpc_deactivate_partition(const int line, struct xpc_partition *part, | |
65c17b80 | 333 | enum xp_retval reason) |
89eb8eb9 DN |
334 | { |
335 | unsigned long irq_flags; | |
89eb8eb9 | 336 | |
89eb8eb9 DN |
337 | spin_lock_irqsave(&part->act_lock, irq_flags); |
338 | ||
83469b55 | 339 | if (part->act_state == XPC_P_AS_INACTIVE) { |
89eb8eb9 DN |
340 | XPC_SET_REASON(part, reason, line); |
341 | spin_unlock_irqrestore(&part->act_lock, irq_flags); | |
65c17b80 | 342 | if (reason == xpReactivating) { |
89eb8eb9 | 343 | /* we interrupt ourselves to reactivate partition */ |
a7665b0a | 344 | xpc_arch_ops.request_partition_reactivation(part); |
89eb8eb9 DN |
345 | } |
346 | return; | |
347 | } | |
83469b55 | 348 | if (part->act_state == XPC_P_AS_DEACTIVATING) { |
65c17b80 DN |
349 | if ((part->reason == xpUnloading && reason != xpUnloading) || |
350 | reason == xpReactivating) { | |
89eb8eb9 DN |
351 | XPC_SET_REASON(part, reason, line); |
352 | } | |
353 | spin_unlock_irqrestore(&part->act_lock, irq_flags); | |
354 | return; | |
355 | } | |
356 | ||
83469b55 | 357 | part->act_state = XPC_P_AS_DEACTIVATING; |
89eb8eb9 DN |
358 | XPC_SET_REASON(part, reason, line); |
359 | ||
360 | spin_unlock_irqrestore(&part->act_lock, irq_flags); | |
361 | ||
a47d5dac | 362 | /* ask remote partition to deactivate with regard to us */ |
a7665b0a | 363 | xpc_arch_ops.request_partition_deactivation(part); |
89eb8eb9 | 364 | |
a47d5dac DN |
365 | /* set a timelimit on the disengage phase of the deactivation request */ |
366 | part->disengage_timeout = jiffies + (xpc_disengage_timelimit * HZ); | |
367 | part->disengage_timer.expires = part->disengage_timeout; | |
368 | add_timer(&part->disengage_timer); | |
89eb8eb9 | 369 | |
e54af724 DN |
370 | dev_dbg(xpc_part, "bringing partition %d down, reason = %d\n", |
371 | XPC_PARTID(part), reason); | |
89eb8eb9 | 372 | |
a607c389 | 373 | xpc_partition_going_down(part, reason); |
89eb8eb9 DN |
374 | } |
375 | ||
89eb8eb9 | 376 | /* |
a607c389 | 377 | * Mark specified partition as inactive. |
89eb8eb9 DN |
378 | */ |
379 | void | |
380 | xpc_mark_partition_inactive(struct xpc_partition *part) | |
381 | { | |
382 | unsigned long irq_flags; | |
383 | ||
89eb8eb9 DN |
384 | dev_dbg(xpc_part, "setting partition %d to INACTIVE\n", |
385 | XPC_PARTID(part)); | |
386 | ||
387 | spin_lock_irqsave(&part->act_lock, irq_flags); | |
83469b55 | 388 | part->act_state = XPC_P_AS_INACTIVE; |
89eb8eb9 DN |
389 | spin_unlock_irqrestore(&part->act_lock, irq_flags); |
390 | part->remote_rp_pa = 0; | |
391 | } | |
392 | ||
89eb8eb9 DN |
393 | /* |
394 | * SAL has provided a partition and machine mask. The partition mask | |
395 | * contains a bit for each even nasid in our partition. The machine | |
396 | * mask contains a bit for each even nasid in the entire machine. | |
397 | * | |
398 | * Using those two bit arrays, we can determine which nasids are | |
399 | * known in the machine. Each should also have a reserved page | |
400 | * initialized if they are available for partitioning. | |
401 | */ | |
402 | void | |
403 | xpc_discovery(void) | |
404 | { | |
405 | void *remote_rp_base; | |
406 | struct xpc_rsvd_page *remote_rp; | |
a812dcc3 | 407 | unsigned long remote_rp_pa; |
89eb8eb9 | 408 | int region; |
4b38fcd4 | 409 | int region_size; |
89eb8eb9 DN |
410 | int max_regions; |
411 | int nasid; | |
412 | struct xpc_rsvd_page *rp; | |
04de7418 | 413 | unsigned long *discovered_nasids; |
65c17b80 | 414 | enum xp_retval ret; |
89eb8eb9 | 415 | |
4b38fcd4 | 416 | remote_rp = xpc_kmalloc_cacheline_aligned(XPC_RP_HEADER_SIZE + |
04de7418 | 417 | xpc_nasid_mask_nbytes, |
4a3ad2dd | 418 | GFP_KERNEL, &remote_rp_base); |
2c2b94f9 | 419 | if (remote_rp == NULL) |
89eb8eb9 | 420 | return; |
2c2b94f9 | 421 | |
04de7418 | 422 | discovered_nasids = kzalloc(sizeof(long) * xpc_nasid_mask_nlongs, |
4a3ad2dd | 423 | GFP_KERNEL); |
89eb8eb9 DN |
424 | if (discovered_nasids == NULL) { |
425 | kfree(remote_rp_base); | |
426 | return; | |
427 | } | |
89eb8eb9 | 428 | |
4a3ad2dd | 429 | rp = (struct xpc_rsvd_page *)xpc_rsvd_page; |
89eb8eb9 DN |
430 | |
431 | /* | |
432 | * The term 'region' in this context refers to the minimum number of | |
433 | * nodes that can comprise an access protection grouping. The access | |
434 | * protection is in regards to memory, IOI and IPI. | |
435 | */ | |
4b38fcd4 | 436 | max_regions = 64; |
261f3b49 | 437 | region_size = xp_region_size; |
4b38fcd4 DN |
438 | |
439 | switch (region_size) { | |
440 | case 128: | |
441 | max_regions *= 2; | |
442 | case 64: | |
443 | max_regions *= 2; | |
444 | case 32: | |
445 | max_regions *= 2; | |
446 | region_size = 16; | |
447 | DBUG_ON(!is_shub2()); | |
448 | } | |
89eb8eb9 DN |
449 | |
450 | for (region = 0; region < max_regions; region++) { | |
451 | ||
2c2b94f9 | 452 | if (xpc_exiting) |
89eb8eb9 | 453 | break; |
89eb8eb9 DN |
454 | |
455 | dev_dbg(xpc_part, "searching region %d\n", region); | |
456 | ||
4b38fcd4 | 457 | for (nasid = (region * region_size * 2); |
4a3ad2dd | 458 | nasid < ((region + 1) * region_size * 2); nasid += 2) { |
89eb8eb9 | 459 | |
2c2b94f9 | 460 | if (xpc_exiting) |
89eb8eb9 | 461 | break; |
89eb8eb9 DN |
462 | |
463 | dev_dbg(xpc_part, "checking nasid %d\n", nasid); | |
464 | ||
04de7418 | 465 | if (test_bit(nasid / 2, xpc_part_nasids)) { |
89eb8eb9 DN |
466 | dev_dbg(xpc_part, "PROM indicates Nasid %d is " |
467 | "part of the local partition; skipping " | |
468 | "region\n", nasid); | |
469 | break; | |
470 | } | |
471 | ||
04de7418 | 472 | if (!(test_bit(nasid / 2, xpc_mach_nasids))) { |
89eb8eb9 DN |
473 | dev_dbg(xpc_part, "PROM indicates Nasid %d was " |
474 | "not on Numa-Link network at reset\n", | |
475 | nasid); | |
476 | continue; | |
477 | } | |
478 | ||
04de7418 | 479 | if (test_bit(nasid / 2, discovered_nasids)) { |
89eb8eb9 DN |
480 | dev_dbg(xpc_part, "Nasid %d is part of a " |
481 | "partition which was previously " | |
482 | "discovered\n", nasid); | |
483 | continue; | |
484 | } | |
485 | ||
33ba3c77 | 486 | /* pull over the rsvd page header & part_nasids mask */ |
89eb8eb9 DN |
487 | |
488 | ret = xpc_get_remote_rp(nasid, discovered_nasids, | |
4a3ad2dd | 489 | remote_rp, &remote_rp_pa); |
65c17b80 | 490 | if (ret != xpSuccess) { |
89eb8eb9 DN |
491 | dev_dbg(xpc_part, "unable to get reserved page " |
492 | "from nasid %d, reason=%d\n", nasid, | |
493 | ret); | |
494 | ||
65c17b80 | 495 | if (ret == xpLocalPartid) |
89eb8eb9 | 496 | break; |
2c2b94f9 | 497 | |
89eb8eb9 DN |
498 | continue; |
499 | } | |
500 | ||
a7665b0a | 501 | xpc_arch_ops.request_partition_activation(remote_rp, |
a47d5dac | 502 | remote_rp_pa, nasid); |
89eb8eb9 DN |
503 | } |
504 | } | |
505 | ||
506 | kfree(discovered_nasids); | |
507 | kfree(remote_rp_base); | |
508 | } | |
509 | ||
89eb8eb9 DN |
510 | /* |
511 | * Given a partid, get the nasids owned by that partition from the | |
3a7d555b | 512 | * remote partition's reserved page. |
89eb8eb9 | 513 | */ |
65c17b80 | 514 | enum xp_retval |
64d032ba | 515 | xpc_initiate_partid_to_nasids(short partid, void *nasid_mask) |
89eb8eb9 DN |
516 | { |
517 | struct xpc_partition *part; | |
a812dcc3 | 518 | unsigned long part_nasid_pa; |
89eb8eb9 | 519 | |
89eb8eb9 | 520 | part = &xpc_partitions[partid]; |
2c2b94f9 | 521 | if (part->remote_rp_pa == 0) |
65c17b80 | 522 | return xpPartitionDown; |
89eb8eb9 | 523 | |
04de7418 | 524 | memset(nasid_mask, 0, xpc_nasid_mask_nbytes); |
4b38fcd4 | 525 | |
a812dcc3 | 526 | part_nasid_pa = (unsigned long)XPC_RP_PART_NASIDS(part->remote_rp_pa); |
89eb8eb9 | 527 | |
a812dcc3 | 528 | return xp_remote_memcpy(xp_pa(nasid_mask), part_nasid_pa, |
04de7418 | 529 | xpc_nasid_mask_nbytes); |
89eb8eb9 | 530 | } |