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