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