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1da177e4 LT |
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 | * | |
f478af9d | 6 | * Copyright (C) 2004-2006 Silicon Graphics, Inc. All rights reserved. |
1da177e4 LT |
7 | * |
8 | * SGI Altix topology and hardware performance monitoring API. | |
9 | * Mark Goodwin <markgw@sgi.com>. | |
10 | * | |
11 | * Creates /proc/sgi_sn/sn_topology (read-only) to export | |
12 | * info about Altix nodes, routers, CPUs and NumaLink | |
13 | * interconnection/topology. | |
14 | * | |
15 | * Also creates a dynamic misc device named "sn_hwperf" | |
16 | * that supports an ioctl interface to call down into SAL | |
17 | * to discover hw objects, topology and to read/write | |
18 | * memory mapped registers, e.g. for performance monitoring. | |
19 | * The "sn_hwperf" device is registered only after the procfs | |
20 | * file is first opened, i.e. only if/when it's needed. | |
21 | * | |
22 | * This API is used by SGI Performance Co-Pilot and other | |
23 | * tools, see http://oss.sgi.com/projects/pcp | |
24 | */ | |
25 | ||
26 | #include <linux/fs.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/vmalloc.h> | |
29 | #include <linux/seq_file.h> | |
30 | #include <linux/miscdevice.h> | |
4a5c13c7 | 31 | #include <linux/utsname.h> |
1da177e4 LT |
32 | #include <linux/cpumask.h> |
33 | #include <linux/smp_lock.h> | |
34 | #include <linux/nodemask.h> | |
a3bc0dbc AM |
35 | #include <linux/smp.h> |
36 | ||
1da177e4 LT |
37 | #include <asm/processor.h> |
38 | #include <asm/topology.h> | |
1da177e4 | 39 | #include <asm/semaphore.h> |
1da177e4 LT |
40 | #include <asm/uaccess.h> |
41 | #include <asm/sal.h> | |
42 | #include <asm/sn/io.h> | |
43 | #include <asm/sn/sn_sal.h> | |
44 | #include <asm/sn/module.h> | |
45 | #include <asm/sn/geo.h> | |
46 | #include <asm/sn/sn2/sn_hwperf.h> | |
4a5c13c7 | 47 | #include <asm/sn/addrs.h> |
1da177e4 LT |
48 | |
49 | static void *sn_hwperf_salheap = NULL; | |
50 | static int sn_hwperf_obj_cnt = 0; | |
51 | static nasid_t sn_hwperf_master_nasid = INVALID_NASID; | |
52 | static int sn_hwperf_init(void); | |
53 | static DECLARE_MUTEX(sn_hwperf_init_mutex); | |
54 | ||
a1d70577 JS |
55 | #define cnode_possible(n) ((n) < num_cnodes) |
56 | ||
1da177e4 LT |
57 | static int sn_hwperf_enum_objects(int *nobj, struct sn_hwperf_object_info **ret) |
58 | { | |
59 | int e; | |
60 | u64 sz; | |
61 | struct sn_hwperf_object_info *objbuf = NULL; | |
62 | ||
63 | if ((e = sn_hwperf_init()) < 0) { | |
60a3ba0b | 64 | printk(KERN_ERR "sn_hwperf_init failed: err %d\n", e); |
1da177e4 LT |
65 | goto out; |
66 | } | |
67 | ||
68 | sz = sn_hwperf_obj_cnt * sizeof(struct sn_hwperf_object_info); | |
69 | if ((objbuf = (struct sn_hwperf_object_info *) vmalloc(sz)) == NULL) { | |
70 | printk("sn_hwperf_enum_objects: vmalloc(%d) failed\n", (int)sz); | |
71 | e = -ENOMEM; | |
72 | goto out; | |
73 | } | |
74 | ||
75 | e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, SN_HWPERF_ENUM_OBJECTS, | |
76 | 0, sz, (u64) objbuf, 0, 0, NULL); | |
77 | if (e != SN_HWPERF_OP_OK) { | |
78 | e = -EINVAL; | |
79 | vfree(objbuf); | |
80 | } | |
81 | ||
82 | out: | |
83 | *nobj = sn_hwperf_obj_cnt; | |
84 | *ret = objbuf; | |
85 | return e; | |
86 | } | |
87 | ||
4a5c13c7 MG |
88 | static int sn_hwperf_location_to_bpos(char *location, |
89 | int *rack, int *bay, int *slot, int *slab) | |
90 | { | |
91 | char type; | |
92 | ||
93 | /* first scan for an old style geoid string */ | |
94 | if (sscanf(location, "%03d%c%02d#%d", | |
95 | rack, &type, bay, slab) == 4) | |
96 | *slot = 0; | |
97 | else /* scan for a new bladed geoid string */ | |
98 | if (sscanf(location, "%03d%c%02d^%02d#%d", | |
99 | rack, &type, bay, slot, slab) != 5) | |
100 | return -1; | |
101 | /* success */ | |
102 | return 0; | |
103 | } | |
104 | ||
1da177e4 LT |
105 | static int sn_hwperf_geoid_to_cnode(char *location) |
106 | { | |
107 | int cnode; | |
108 | geoid_t geoid; | |
109 | moduleid_t module_id; | |
4a5c13c7 MG |
110 | int rack, bay, slot, slab; |
111 | int this_rack, this_bay, this_slot, this_slab; | |
1da177e4 | 112 | |
4a5c13c7 | 113 | if (sn_hwperf_location_to_bpos(location, &rack, &bay, &slot, &slab)) |
1da177e4 LT |
114 | return -1; |
115 | ||
769ebc66 DR |
116 | /* |
117 | * FIXME: replace with cleaner for_each_XXX macro which addresses | |
118 | * both compute and IO nodes once ACPI3.0 is available. | |
119 | */ | |
120 | for (cnode = 0; cnode < num_cnodes; cnode++) { | |
1da177e4 LT |
121 | geoid = cnodeid_get_geoid(cnode); |
122 | module_id = geo_module(geoid); | |
123 | this_rack = MODULE_GET_RACK(module_id); | |
4a5c13c7 | 124 | this_bay = MODULE_GET_BPOS(module_id); |
0985ea8f | 125 | this_slot = geo_slot(geoid); |
1da177e4 | 126 | this_slab = geo_slab(geoid); |
4a5c13c7 MG |
127 | if (rack == this_rack && bay == this_bay && |
128 | slot == this_slot && slab == this_slab) { | |
1da177e4 | 129 | break; |
4a5c13c7 | 130 | } |
1da177e4 LT |
131 | } |
132 | ||
a1d70577 | 133 | return cnode_possible(cnode) ? cnode : -1; |
1da177e4 LT |
134 | } |
135 | ||
136 | static int sn_hwperf_obj_to_cnode(struct sn_hwperf_object_info * obj) | |
137 | { | |
60a3ba0b MG |
138 | if (!SN_HWPERF_IS_NODE(obj) && !SN_HWPERF_IS_IONODE(obj)) |
139 | BUG(); | |
a1d70577 | 140 | if (SN_HWPERF_FOREIGN(obj)) |
1da177e4 LT |
141 | return -1; |
142 | return sn_hwperf_geoid_to_cnode(obj->location); | |
143 | } | |
144 | ||
145 | static int sn_hwperf_generic_ordinal(struct sn_hwperf_object_info *obj, | |
146 | struct sn_hwperf_object_info *objs) | |
147 | { | |
148 | int ordinal; | |
149 | struct sn_hwperf_object_info *p; | |
150 | ||
151 | for (ordinal=0, p=objs; p != obj; p++) { | |
152 | if (SN_HWPERF_FOREIGN(p)) | |
153 | continue; | |
154 | if (SN_HWPERF_SAME_OBJTYPE(p, obj)) | |
155 | ordinal++; | |
156 | } | |
157 | ||
158 | return ordinal; | |
159 | } | |
160 | ||
161 | static const char *slabname_node = "node"; /* SHub asic */ | |
162 | static const char *slabname_ionode = "ionode"; /* TIO asic */ | |
163 | static const char *slabname_router = "router"; /* NL3R or NL4R */ | |
164 | static const char *slabname_other = "other"; /* unknown asic */ | |
165 | ||
166 | static const char *sn_hwperf_get_slabname(struct sn_hwperf_object_info *obj, | |
167 | struct sn_hwperf_object_info *objs, int *ordinal) | |
168 | { | |
169 | int isnode; | |
170 | const char *slabname = slabname_other; | |
171 | ||
172 | if ((isnode = SN_HWPERF_IS_NODE(obj)) || SN_HWPERF_IS_IONODE(obj)) { | |
173 | slabname = isnode ? slabname_node : slabname_ionode; | |
174 | *ordinal = sn_hwperf_obj_to_cnode(obj); | |
175 | } | |
176 | else { | |
177 | *ordinal = sn_hwperf_generic_ordinal(obj, objs); | |
178 | if (SN_HWPERF_IS_ROUTER(obj)) | |
179 | slabname = slabname_router; | |
180 | } | |
181 | ||
182 | return slabname; | |
183 | } | |
184 | ||
ecc3c30a | 185 | static void print_pci_topology(struct seq_file *s) |
4a5c13c7 | 186 | { |
ecc3c30a MG |
187 | char *p; |
188 | size_t sz; | |
189 | int e; | |
190 | ||
191 | for (sz = PAGE_SIZE; sz < 16 * PAGE_SIZE; sz += PAGE_SIZE) { | |
192 | if (!(p = (char *)kmalloc(sz, GFP_KERNEL))) | |
193 | break; | |
194 | e = ia64_sn_ioif_get_pci_topology(__pa(p), sz); | |
195 | if (e == SALRET_OK) | |
196 | seq_puts(s, p); | |
197 | kfree(p); | |
198 | if (e == SALRET_OK || e == SALRET_NOT_IMPLEMENTED) | |
199 | break; | |
4a5c13c7 MG |
200 | } |
201 | } | |
202 | ||
60a3ba0b MG |
203 | static inline int sn_hwperf_has_cpus(cnodeid_t node) |
204 | { | |
a1d70577 | 205 | return node < MAX_NUMNODES && node_online(node) && nr_cpus_node(node); |
60a3ba0b MG |
206 | } |
207 | ||
208 | static inline int sn_hwperf_has_mem(cnodeid_t node) | |
209 | { | |
a1d70577 | 210 | return node < MAX_NUMNODES && node_online(node) && NODE_DATA(node)->node_present_pages; |
60a3ba0b MG |
211 | } |
212 | ||
213 | static struct sn_hwperf_object_info * | |
214 | sn_hwperf_findobj_id(struct sn_hwperf_object_info *objbuf, | |
215 | int nobj, int id) | |
4a5c13c7 | 216 | { |
60a3ba0b MG |
217 | int i; |
218 | struct sn_hwperf_object_info *p = objbuf; | |
219 | ||
220 | for (i=0; i < nobj; i++, p++) { | |
221 | if (p->id == id) | |
222 | return p; | |
223 | } | |
224 | ||
225 | return NULL; | |
226 | ||
227 | } | |
228 | ||
229 | static int sn_hwperf_get_nearest_node_objdata(struct sn_hwperf_object_info *objbuf, | |
230 | int nobj, cnodeid_t node, cnodeid_t *near_mem_node, cnodeid_t *near_cpu_node) | |
231 | { | |
232 | int e; | |
233 | struct sn_hwperf_object_info *nodeobj = NULL; | |
234 | struct sn_hwperf_object_info *op; | |
235 | struct sn_hwperf_object_info *dest; | |
236 | struct sn_hwperf_object_info *router; | |
237 | struct sn_hwperf_port_info ptdata[16]; | |
238 | int sz, i, j; | |
239 | cnodeid_t c; | |
240 | int found_mem = 0; | |
241 | int found_cpu = 0; | |
242 | ||
a1d70577 | 243 | if (!cnode_possible(node)) |
60a3ba0b MG |
244 | return -EINVAL; |
245 | ||
246 | if (sn_hwperf_has_cpus(node)) { | |
247 | if (near_cpu_node) | |
248 | *near_cpu_node = node; | |
249 | found_cpu++; | |
250 | } | |
251 | ||
252 | if (sn_hwperf_has_mem(node)) { | |
253 | if (near_mem_node) | |
254 | *near_mem_node = node; | |
255 | found_mem++; | |
256 | } | |
257 | ||
258 | if (found_cpu && found_mem) | |
259 | return 0; /* trivially successful */ | |
260 | ||
261 | /* find the argument node object */ | |
262 | for (i=0, op=objbuf; i < nobj; i++, op++) { | |
263 | if (!SN_HWPERF_IS_NODE(op) && !SN_HWPERF_IS_IONODE(op)) | |
264 | continue; | |
265 | if (node == sn_hwperf_obj_to_cnode(op)) { | |
266 | nodeobj = op; | |
267 | break; | |
268 | } | |
269 | } | |
270 | if (!nodeobj) { | |
271 | e = -ENOENT; | |
272 | goto err; | |
273 | } | |
274 | ||
275 | /* get it's interconnect topology */ | |
276 | sz = op->ports * sizeof(struct sn_hwperf_port_info); | |
277 | if (sz > sizeof(ptdata)) | |
278 | BUG(); | |
279 | e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
280 | SN_HWPERF_ENUM_PORTS, nodeobj->id, sz, | |
281 | (u64)&ptdata, 0, 0, NULL); | |
282 | if (e != SN_HWPERF_OP_OK) { | |
283 | e = -EINVAL; | |
284 | goto err; | |
285 | } | |
286 | ||
287 | /* find nearest node with cpus and nearest memory */ | |
288 | for (router=NULL, j=0; j < op->ports; j++) { | |
289 | dest = sn_hwperf_findobj_id(objbuf, nobj, ptdata[j].conn_id); | |
f0fe253c JS |
290 | if (dest && SN_HWPERF_IS_ROUTER(dest)) |
291 | router = dest; | |
60a3ba0b MG |
292 | if (!dest || SN_HWPERF_FOREIGN(dest) || |
293 | !SN_HWPERF_IS_NODE(dest) || SN_HWPERF_IS_IONODE(dest)) { | |
294 | continue; | |
295 | } | |
296 | c = sn_hwperf_obj_to_cnode(dest); | |
297 | if (!found_cpu && sn_hwperf_has_cpus(c)) { | |
298 | if (near_cpu_node) | |
299 | *near_cpu_node = c; | |
300 | found_cpu++; | |
301 | } | |
302 | if (!found_mem && sn_hwperf_has_mem(c)) { | |
303 | if (near_mem_node) | |
304 | *near_mem_node = c; | |
305 | found_mem++; | |
306 | } | |
60a3ba0b MG |
307 | } |
308 | ||
309 | if (router && (!found_cpu || !found_mem)) { | |
310 | /* search for a node connected to the same router */ | |
311 | sz = router->ports * sizeof(struct sn_hwperf_port_info); | |
312 | if (sz > sizeof(ptdata)) | |
313 | BUG(); | |
314 | e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
315 | SN_HWPERF_ENUM_PORTS, router->id, sz, | |
316 | (u64)&ptdata, 0, 0, NULL); | |
317 | if (e != SN_HWPERF_OP_OK) { | |
318 | e = -EINVAL; | |
319 | goto err; | |
320 | } | |
321 | for (j=0; j < router->ports; j++) { | |
322 | dest = sn_hwperf_findobj_id(objbuf, nobj, | |
323 | ptdata[j].conn_id); | |
324 | if (!dest || dest->id == node || | |
325 | SN_HWPERF_FOREIGN(dest) || | |
326 | !SN_HWPERF_IS_NODE(dest) || | |
327 | SN_HWPERF_IS_IONODE(dest)) { | |
328 | continue; | |
329 | } | |
330 | c = sn_hwperf_obj_to_cnode(dest); | |
331 | if (!found_cpu && sn_hwperf_has_cpus(c)) { | |
332 | if (near_cpu_node) | |
333 | *near_cpu_node = c; | |
334 | found_cpu++; | |
335 | } | |
336 | if (!found_mem && sn_hwperf_has_mem(c)) { | |
337 | if (near_mem_node) | |
338 | *near_mem_node = c; | |
339 | found_mem++; | |
340 | } | |
341 | if (found_cpu && found_mem) | |
342 | break; | |
343 | } | |
344 | } | |
345 | ||
346 | if (!found_cpu || !found_mem) { | |
347 | /* resort to _any_ node with CPUs and memory */ | |
348 | for (i=0, op=objbuf; i < nobj; i++, op++) { | |
349 | if (SN_HWPERF_FOREIGN(op) || | |
350 | SN_HWPERF_IS_IONODE(op) || | |
351 | !SN_HWPERF_IS_NODE(op)) { | |
352 | continue; | |
353 | } | |
354 | c = sn_hwperf_obj_to_cnode(op); | |
355 | if (!found_cpu && sn_hwperf_has_cpus(c)) { | |
356 | if (near_cpu_node) | |
357 | *near_cpu_node = c; | |
358 | found_cpu++; | |
359 | } | |
360 | if (!found_mem && sn_hwperf_has_mem(c)) { | |
361 | if (near_mem_node) | |
362 | *near_mem_node = c; | |
363 | found_mem++; | |
364 | } | |
365 | if (found_cpu && found_mem) | |
0985ea8f | 366 | break; |
0985ea8f | 367 | } |
4a5c13c7 | 368 | } |
60a3ba0b MG |
369 | |
370 | if (!found_cpu || !found_mem) | |
371 | e = -ENODATA; | |
372 | ||
373 | err: | |
374 | return e; | |
4a5c13c7 MG |
375 | } |
376 | ||
60a3ba0b | 377 | |
1da177e4 LT |
378 | static int sn_topology_show(struct seq_file *s, void *d) |
379 | { | |
380 | int sz; | |
381 | int pt; | |
4a5c13c7 | 382 | int e = 0; |
1da177e4 LT |
383 | int i; |
384 | int j; | |
385 | const char *slabname; | |
386 | int ordinal; | |
387 | cpumask_t cpumask; | |
388 | char slice; | |
389 | struct cpuinfo_ia64 *c; | |
390 | struct sn_hwperf_port_info *ptdata; | |
391 | struct sn_hwperf_object_info *p; | |
392 | struct sn_hwperf_object_info *obj = d; /* this object */ | |
393 | struct sn_hwperf_object_info *objs = s->private; /* all objects */ | |
4a5c13c7 MG |
394 | u8 shubtype; |
395 | u8 system_size; | |
396 | u8 sharing_size; | |
397 | u8 partid; | |
398 | u8 coher; | |
399 | u8 nasid_shift; | |
400 | u8 region_size; | |
401 | u16 nasid_mask; | |
402 | int nasid_msb; | |
1da177e4 LT |
403 | |
404 | if (obj == objs) { | |
4a5c13c7 | 405 | seq_printf(s, "# sn_topology version 2\n"); |
1da177e4 LT |
406 | seq_printf(s, "# objtype ordinal location partition" |
407 | " [attribute value [, ...]]\n"); | |
4a5c13c7 MG |
408 | |
409 | if (ia64_sn_get_sn_info(0, | |
410 | &shubtype, &nasid_mask, &nasid_shift, &system_size, | |
411 | &sharing_size, &partid, &coher, ®ion_size)) | |
412 | BUG(); | |
413 | for (nasid_msb=63; nasid_msb > 0; nasid_msb--) { | |
414 | if (((u64)nasid_mask << nasid_shift) & (1ULL << nasid_msb)) | |
415 | break; | |
416 | } | |
417 | seq_printf(s, "partition %u %s local " | |
418 | "shubtype %s, " | |
419 | "nasid_mask 0x%016lx, " | |
420 | "nasid_bits %d:%d, " | |
421 | "system_size %d, " | |
422 | "sharing_size %d, " | |
423 | "coherency_domain %d, " | |
424 | "region_size %d\n", | |
425 | ||
e9ff3990 | 426 | partid, utsname()->nodename, |
4a5c13c7 MG |
427 | shubtype ? "shub2" : "shub1", |
428 | (u64)nasid_mask << nasid_shift, nasid_msb, nasid_shift, | |
429 | system_size, sharing_size, coher, region_size); | |
ecc3c30a MG |
430 | |
431 | print_pci_topology(s); | |
1da177e4 LT |
432 | } |
433 | ||
434 | if (SN_HWPERF_FOREIGN(obj)) { | |
435 | /* private in another partition: not interesting */ | |
436 | return 0; | |
437 | } | |
438 | ||
4a5c13c7 | 439 | for (i = 0; i < SN_HWPERF_MAXSTRING && obj->name[i]; i++) { |
1da177e4 LT |
440 | if (obj->name[i] == ' ') |
441 | obj->name[i] = '_'; | |
442 | } | |
443 | ||
444 | slabname = sn_hwperf_get_slabname(obj, objs, &ordinal); | |
445 | seq_printf(s, "%s %d %s %s asic %s", slabname, ordinal, obj->location, | |
446 | obj->sn_hwp_this_part ? "local" : "shared", obj->name); | |
447 | ||
a1d70577 | 448 | if (ordinal < 0 || (!SN_HWPERF_IS_NODE(obj) && !SN_HWPERF_IS_IONODE(obj))) |
1da177e4 LT |
449 | seq_putc(s, '\n'); |
450 | else { | |
60a3ba0b MG |
451 | cnodeid_t near_mem = -1; |
452 | cnodeid_t near_cpu = -1; | |
453 | ||
1da177e4 | 454 | seq_printf(s, ", nasid 0x%x", cnodeid_to_nasid(ordinal)); |
60a3ba0b MG |
455 | |
456 | if (sn_hwperf_get_nearest_node_objdata(objs, sn_hwperf_obj_cnt, | |
457 | ordinal, &near_mem, &near_cpu) == 0) { | |
458 | seq_printf(s, ", near_mem_nodeid %d, near_cpu_nodeid %d", | |
459 | near_mem, near_cpu); | |
460 | } | |
461 | ||
462 | if (!SN_HWPERF_IS_IONODE(obj)) { | |
463 | for_each_online_node(i) { | |
464 | seq_printf(s, i ? ":%d" : ", dist %d", | |
465 | node_distance(ordinal, i)); | |
466 | } | |
1da177e4 | 467 | } |
60a3ba0b | 468 | |
1da177e4 LT |
469 | seq_putc(s, '\n'); |
470 | ||
471 | /* | |
472 | * CPUs on this node, if any | |
473 | */ | |
a1d70577 JS |
474 | if (!SN_HWPERF_IS_IONODE(obj)) { |
475 | cpumask = node_to_cpumask(ordinal); | |
476 | for_each_online_cpu(i) { | |
477 | if (cpu_isset(i, cpumask)) { | |
478 | slice = 'a' + cpuid_to_slice(i); | |
479 | c = cpu_data(i); | |
480 | seq_printf(s, "cpu %d %s%c local" | |
481 | " freq %luMHz, arch ia64", | |
482 | i, obj->location, slice, | |
483 | c->proc_freq / 1000000); | |
484 | for_each_online_cpu(j) { | |
485 | seq_printf(s, j ? ":%d" : ", dist %d", | |
486 | node_distance( | |
487 | cpu_to_node(i), | |
488 | cpu_to_node(j))); | |
489 | } | |
490 | seq_putc(s, '\n'); | |
1da177e4 | 491 | } |
1da177e4 LT |
492 | } |
493 | } | |
494 | } | |
495 | ||
496 | if (obj->ports) { | |
497 | /* | |
498 | * numalink ports | |
499 | */ | |
500 | sz = obj->ports * sizeof(struct sn_hwperf_port_info); | |
dd4cb9f8 | 501 | if ((ptdata = kmalloc(sz, GFP_KERNEL)) == NULL) |
1da177e4 LT |
502 | return -ENOMEM; |
503 | e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
504 | SN_HWPERF_ENUM_PORTS, obj->id, sz, | |
505 | (u64) ptdata, 0, 0, NULL); | |
506 | if (e != SN_HWPERF_OP_OK) | |
507 | return -EINVAL; | |
508 | for (ordinal=0, p=objs; p != obj; p++) { | |
509 | if (!SN_HWPERF_FOREIGN(p)) | |
510 | ordinal += p->ports; | |
511 | } | |
512 | for (pt = 0; pt < obj->ports; pt++) { | |
513 | for (p = objs, i = 0; i < sn_hwperf_obj_cnt; i++, p++) { | |
514 | if (ptdata[pt].conn_id == p->id) { | |
515 | break; | |
516 | } | |
517 | } | |
518 | seq_printf(s, "numalink %d %s-%d", | |
519 | ordinal+pt, obj->location, ptdata[pt].port); | |
520 | ||
521 | if (i >= sn_hwperf_obj_cnt) { | |
522 | /* no connection */ | |
523 | seq_puts(s, " local endpoint disconnected" | |
524 | ", protocol unknown\n"); | |
525 | continue; | |
526 | } | |
527 | ||
528 | if (obj->sn_hwp_this_part && p->sn_hwp_this_part) | |
529 | /* both ends local to this partition */ | |
530 | seq_puts(s, " local"); | |
a1d70577 | 531 | else if (SN_HWPERF_FOREIGN(p)) |
1da177e4 LT |
532 | /* both ends of the link in foreign partiton */ |
533 | seq_puts(s, " foreign"); | |
534 | else | |
535 | /* link straddles a partition */ | |
536 | seq_puts(s, " shared"); | |
537 | ||
538 | /* | |
539 | * Unlikely, but strictly should query the LLP config | |
540 | * registers because an NL4R can be configured to run | |
541 | * NL3 protocol, even when not talking to an NL3 router. | |
542 | * Ditto for node-node. | |
543 | */ | |
544 | seq_printf(s, " endpoint %s-%d, protocol %s\n", | |
545 | p->location, ptdata[pt].conn_port, | |
546 | (SN_HWPERF_IS_NL3ROUTER(obj) || | |
547 | SN_HWPERF_IS_NL3ROUTER(p)) ? "LLP3" : "LLP4"); | |
548 | } | |
dd4cb9f8 | 549 | kfree(ptdata); |
1da177e4 LT |
550 | } |
551 | ||
552 | return 0; | |
553 | } | |
554 | ||
555 | static void *sn_topology_start(struct seq_file *s, loff_t * pos) | |
556 | { | |
557 | struct sn_hwperf_object_info *objs = s->private; | |
558 | ||
559 | if (*pos < sn_hwperf_obj_cnt) | |
560 | return (void *)(objs + *pos); | |
561 | ||
562 | return NULL; | |
563 | } | |
564 | ||
565 | static void *sn_topology_next(struct seq_file *s, void *v, loff_t * pos) | |
566 | { | |
567 | ++*pos; | |
568 | return sn_topology_start(s, pos); | |
569 | } | |
570 | ||
571 | static void sn_topology_stop(struct seq_file *m, void *v) | |
572 | { | |
573 | return; | |
574 | } | |
575 | ||
576 | /* | |
577 | * /proc/sgi_sn/sn_topology, read-only using seq_file | |
578 | */ | |
579 | static struct seq_operations sn_topology_seq_ops = { | |
580 | .start = sn_topology_start, | |
581 | .next = sn_topology_next, | |
582 | .stop = sn_topology_stop, | |
583 | .show = sn_topology_show | |
584 | }; | |
585 | ||
586 | struct sn_hwperf_op_info { | |
587 | u64 op; | |
588 | struct sn_hwperf_ioctl_args *a; | |
589 | void *p; | |
590 | int *v0; | |
591 | int ret; | |
592 | }; | |
593 | ||
594 | static void sn_hwperf_call_sal(void *info) | |
595 | { | |
596 | struct sn_hwperf_op_info *op_info = info; | |
597 | int r; | |
598 | ||
599 | r = ia64_sn_hwperf_op(sn_hwperf_master_nasid, op_info->op, | |
600 | op_info->a->arg, op_info->a->sz, | |
601 | (u64) op_info->p, 0, 0, op_info->v0); | |
602 | op_info->ret = r; | |
603 | } | |
604 | ||
605 | static int sn_hwperf_op_cpu(struct sn_hwperf_op_info *op_info) | |
606 | { | |
607 | u32 cpu; | |
608 | u32 use_ipi; | |
609 | int r = 0; | |
610 | cpumask_t save_allowed; | |
611 | ||
612 | cpu = (op_info->a->arg & SN_HWPERF_ARG_CPU_MASK) >> 32; | |
613 | use_ipi = op_info->a->arg & SN_HWPERF_ARG_USE_IPI_MASK; | |
614 | op_info->a->arg &= SN_HWPERF_ARG_OBJID_MASK; | |
615 | ||
616 | if (cpu != SN_HWPERF_ARG_ANY_CPU) { | |
e6ef0fca | 617 | if (cpu >= NR_CPUS || !cpu_online(cpu)) { |
1da177e4 LT |
618 | r = -EINVAL; |
619 | goto out; | |
620 | } | |
621 | } | |
622 | ||
623 | if (cpu == SN_HWPERF_ARG_ANY_CPU || cpu == get_cpu()) { | |
624 | /* don't care, or already on correct cpu */ | |
625 | sn_hwperf_call_sal(op_info); | |
626 | } | |
627 | else { | |
628 | if (use_ipi) { | |
629 | /* use an interprocessor interrupt to call SAL */ | |
630 | smp_call_function_single(cpu, sn_hwperf_call_sal, | |
631 | op_info, 1, 1); | |
632 | } | |
633 | else { | |
634 | /* migrate the task before calling SAL */ | |
635 | save_allowed = current->cpus_allowed; | |
636 | set_cpus_allowed(current, cpumask_of_cpu(cpu)); | |
637 | sn_hwperf_call_sal(op_info); | |
638 | set_cpus_allowed(current, save_allowed); | |
639 | } | |
640 | } | |
641 | r = op_info->ret; | |
642 | ||
643 | out: | |
644 | return r; | |
645 | } | |
646 | ||
647 | /* map SAL hwperf error code to system error code */ | |
648 | static int sn_hwperf_map_err(int hwperf_err) | |
649 | { | |
650 | int e; | |
651 | ||
652 | switch(hwperf_err) { | |
653 | case SN_HWPERF_OP_OK: | |
654 | e = 0; | |
655 | break; | |
656 | ||
657 | case SN_HWPERF_OP_NOMEM: | |
658 | e = -ENOMEM; | |
659 | break; | |
660 | ||
661 | case SN_HWPERF_OP_NO_PERM: | |
662 | e = -EPERM; | |
663 | break; | |
664 | ||
665 | case SN_HWPERF_OP_IO_ERROR: | |
666 | e = -EIO; | |
667 | break; | |
668 | ||
669 | case SN_HWPERF_OP_BUSY: | |
4a5c13c7 MG |
670 | e = -EBUSY; |
671 | break; | |
672 | ||
1da177e4 LT |
673 | case SN_HWPERF_OP_RECONFIGURE: |
674 | e = -EAGAIN; | |
675 | break; | |
676 | ||
677 | case SN_HWPERF_OP_INVAL: | |
678 | default: | |
679 | e = -EINVAL; | |
680 | break; | |
681 | } | |
682 | ||
683 | return e; | |
684 | } | |
685 | ||
686 | /* | |
687 | * ioctl for "sn_hwperf" misc device | |
688 | */ | |
689 | static int | |
690 | sn_hwperf_ioctl(struct inode *in, struct file *fp, u32 op, u64 arg) | |
691 | { | |
692 | struct sn_hwperf_ioctl_args a; | |
693 | struct cpuinfo_ia64 *cdata; | |
694 | struct sn_hwperf_object_info *objs; | |
695 | struct sn_hwperf_object_info *cpuobj; | |
696 | struct sn_hwperf_op_info op_info; | |
697 | void *p = NULL; | |
698 | int nobj; | |
699 | char slice; | |
700 | int node; | |
701 | int r; | |
702 | int v0; | |
703 | int i; | |
704 | int j; | |
705 | ||
706 | unlock_kernel(); | |
707 | ||
708 | /* only user requests are allowed here */ | |
709 | if ((op & SN_HWPERF_OP_MASK) < 10) { | |
710 | r = -EINVAL; | |
711 | goto error; | |
712 | } | |
713 | r = copy_from_user(&a, (const void __user *)arg, | |
714 | sizeof(struct sn_hwperf_ioctl_args)); | |
715 | if (r != 0) { | |
716 | r = -EFAULT; | |
717 | goto error; | |
718 | } | |
719 | ||
720 | /* | |
721 | * Allocate memory to hold a kernel copy of the user buffer. The | |
722 | * buffer contents are either copied in or out (or both) of user | |
723 | * space depending on the flags encoded in the requested operation. | |
724 | */ | |
725 | if (a.ptr) { | |
726 | p = vmalloc(a.sz); | |
727 | if (!p) { | |
728 | r = -ENOMEM; | |
729 | goto error; | |
730 | } | |
731 | } | |
732 | ||
733 | if (op & SN_HWPERF_OP_MEM_COPYIN) { | |
734 | r = copy_from_user(p, (const void __user *)a.ptr, a.sz); | |
735 | if (r != 0) { | |
736 | r = -EFAULT; | |
737 | goto error; | |
738 | } | |
739 | } | |
740 | ||
741 | switch (op) { | |
742 | case SN_HWPERF_GET_CPU_INFO: | |
743 | if (a.sz == sizeof(u64)) { | |
744 | /* special case to get size needed */ | |
745 | *(u64 *) p = (u64) num_online_cpus() * | |
746 | sizeof(struct sn_hwperf_object_info); | |
747 | } else | |
748 | if (a.sz < num_online_cpus() * sizeof(struct sn_hwperf_object_info)) { | |
749 | r = -ENOMEM; | |
750 | goto error; | |
751 | } else | |
752 | if ((r = sn_hwperf_enum_objects(&nobj, &objs)) == 0) { | |
753 | memset(p, 0, a.sz); | |
754 | for (i = 0; i < nobj; i++) { | |
090de0b7 | 755 | int cpuobj_index = 0; |
60a3ba0b MG |
756 | if (!SN_HWPERF_IS_NODE(objs + i)) |
757 | continue; | |
1da177e4 LT |
758 | node = sn_hwperf_obj_to_cnode(objs + i); |
759 | for_each_online_cpu(j) { | |
760 | if (node != cpu_to_node(j)) | |
761 | continue; | |
090de0b7 | 762 | cpuobj = (struct sn_hwperf_object_info *) p + cpuobj_index++; |
1da177e4 LT |
763 | slice = 'a' + cpuid_to_slice(j); |
764 | cdata = cpu_data(j); | |
765 | cpuobj->id = j; | |
766 | snprintf(cpuobj->name, | |
767 | sizeof(cpuobj->name), | |
768 | "CPU %luMHz %s", | |
769 | cdata->proc_freq / 1000000, | |
770 | cdata->vendor); | |
771 | snprintf(cpuobj->location, | |
772 | sizeof(cpuobj->location), | |
773 | "%s%c", objs[i].location, | |
774 | slice); | |
775 | } | |
776 | } | |
777 | ||
778 | vfree(objs); | |
779 | } | |
780 | break; | |
781 | ||
782 | case SN_HWPERF_GET_NODE_NASID: | |
783 | if (a.sz != sizeof(u64) || | |
a1d70577 | 784 | (node = a.arg) < 0 || !cnode_possible(node)) { |
1da177e4 LT |
785 | r = -EINVAL; |
786 | goto error; | |
787 | } | |
788 | *(u64 *)p = (u64)cnodeid_to_nasid(node); | |
789 | break; | |
790 | ||
791 | case SN_HWPERF_GET_OBJ_NODE: | |
792 | if (a.sz != sizeof(u64) || a.arg < 0) { | |
793 | r = -EINVAL; | |
794 | goto error; | |
795 | } | |
796 | if ((r = sn_hwperf_enum_objects(&nobj, &objs)) == 0) { | |
797 | if (a.arg >= nobj) { | |
798 | r = -EINVAL; | |
799 | vfree(objs); | |
800 | goto error; | |
801 | } | |
802 | if (objs[(i = a.arg)].id != a.arg) { | |
803 | for (i = 0; i < nobj; i++) { | |
804 | if (objs[i].id == a.arg) | |
805 | break; | |
806 | } | |
807 | } | |
808 | if (i == nobj) { | |
809 | r = -EINVAL; | |
810 | vfree(objs); | |
811 | goto error; | |
812 | } | |
60a3ba0b MG |
813 | |
814 | if (!SN_HWPERF_IS_NODE(objs + i) && | |
815 | !SN_HWPERF_IS_IONODE(objs + i)) { | |
816 | r = -ENOENT; | |
817 | vfree(objs); | |
818 | goto error; | |
819 | } | |
820 | ||
1da177e4 LT |
821 | *(u64 *)p = (u64)sn_hwperf_obj_to_cnode(objs + i); |
822 | vfree(objs); | |
823 | } | |
824 | break; | |
825 | ||
826 | case SN_HWPERF_GET_MMRS: | |
827 | case SN_HWPERF_SET_MMRS: | |
828 | case SN_HWPERF_OBJECT_DISTANCE: | |
829 | op_info.p = p; | |
830 | op_info.a = &a; | |
831 | op_info.v0 = &v0; | |
832 | op_info.op = op; | |
833 | r = sn_hwperf_op_cpu(&op_info); | |
834 | if (r) { | |
835 | r = sn_hwperf_map_err(r); | |
4a5c13c7 | 836 | a.v0 = v0; |
1da177e4 LT |
837 | goto error; |
838 | } | |
839 | break; | |
840 | ||
841 | default: | |
842 | /* all other ops are a direct SAL call */ | |
843 | r = ia64_sn_hwperf_op(sn_hwperf_master_nasid, op, | |
844 | a.arg, a.sz, (u64) p, 0, 0, &v0); | |
845 | if (r) { | |
846 | r = sn_hwperf_map_err(r); | |
847 | goto error; | |
848 | } | |
849 | a.v0 = v0; | |
850 | break; | |
851 | } | |
852 | ||
853 | if (op & SN_HWPERF_OP_MEM_COPYOUT) { | |
854 | r = copy_to_user((void __user *)a.ptr, p, a.sz); | |
855 | if (r != 0) { | |
856 | r = -EFAULT; | |
857 | goto error; | |
858 | } | |
859 | } | |
860 | ||
861 | error: | |
862 | vfree(p); | |
863 | ||
864 | lock_kernel(); | |
865 | return r; | |
866 | } | |
867 | ||
868 | static struct file_operations sn_hwperf_fops = { | |
869 | .ioctl = sn_hwperf_ioctl, | |
870 | }; | |
871 | ||
872 | static struct miscdevice sn_hwperf_dev = { | |
873 | MISC_DYNAMIC_MINOR, | |
874 | "sn_hwperf", | |
875 | &sn_hwperf_fops | |
876 | }; | |
877 | ||
878 | static int sn_hwperf_init(void) | |
879 | { | |
880 | u64 v; | |
881 | int salr; | |
882 | int e = 0; | |
883 | ||
884 | /* single threaded, once-only initialization */ | |
885 | down(&sn_hwperf_init_mutex); | |
60a3ba0b | 886 | |
1da177e4 LT |
887 | if (sn_hwperf_salheap) { |
888 | up(&sn_hwperf_init_mutex); | |
889 | return e; | |
890 | } | |
891 | ||
892 | /* | |
893 | * The PROM code needs a fixed reference node. For convenience the | |
894 | * same node as the console I/O is used. | |
895 | */ | |
896 | sn_hwperf_master_nasid = (nasid_t) ia64_sn_get_console_nasid(); | |
897 | ||
898 | /* | |
899 | * Request the needed size and install the PROM scratch area. | |
900 | * The PROM keeps various tracking bits in this memory area. | |
901 | */ | |
902 | salr = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
903 | (u64) SN_HWPERF_GET_HEAPSIZE, 0, | |
904 | (u64) sizeof(u64), (u64) &v, 0, 0, NULL); | |
905 | if (salr != SN_HWPERF_OP_OK) { | |
906 | e = -EINVAL; | |
907 | goto out; | |
908 | } | |
909 | ||
910 | if ((sn_hwperf_salheap = vmalloc(v)) == NULL) { | |
911 | e = -ENOMEM; | |
912 | goto out; | |
913 | } | |
914 | salr = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
915 | SN_HWPERF_INSTALL_HEAP, 0, v, | |
916 | (u64) sn_hwperf_salheap, 0, 0, NULL); | |
917 | if (salr != SN_HWPERF_OP_OK) { | |
918 | e = -EINVAL; | |
919 | goto out; | |
920 | } | |
921 | ||
922 | salr = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
923 | SN_HWPERF_OBJECT_COUNT, 0, | |
924 | sizeof(u64), (u64) &v, 0, 0, NULL); | |
925 | if (salr != SN_HWPERF_OP_OK) { | |
926 | e = -EINVAL; | |
927 | goto out; | |
928 | } | |
929 | sn_hwperf_obj_cnt = (int)v; | |
930 | ||
931 | out: | |
932 | if (e < 0 && sn_hwperf_salheap) { | |
933 | vfree(sn_hwperf_salheap); | |
934 | sn_hwperf_salheap = NULL; | |
935 | sn_hwperf_obj_cnt = 0; | |
936 | } | |
1da177e4 LT |
937 | up(&sn_hwperf_init_mutex); |
938 | return e; | |
939 | } | |
940 | ||
941 | int sn_topology_open(struct inode *inode, struct file *file) | |
942 | { | |
943 | int e; | |
944 | struct seq_file *seq; | |
945 | struct sn_hwperf_object_info *objbuf; | |
946 | int nobj; | |
947 | ||
948 | if ((e = sn_hwperf_enum_objects(&nobj, &objbuf)) == 0) { | |
949 | e = seq_open(file, &sn_topology_seq_ops); | |
950 | seq = file->private_data; | |
951 | seq->private = objbuf; | |
952 | } | |
953 | ||
954 | return e; | |
955 | } | |
956 | ||
957 | int sn_topology_release(struct inode *inode, struct file *file) | |
958 | { | |
959 | struct seq_file *seq = file->private_data; | |
960 | ||
961 | vfree(seq->private); | |
962 | return seq_release(inode, file); | |
963 | } | |
60a3ba0b MG |
964 | |
965 | int sn_hwperf_get_nearest_node(cnodeid_t node, | |
966 | cnodeid_t *near_mem_node, cnodeid_t *near_cpu_node) | |
967 | { | |
968 | int e; | |
969 | int nobj; | |
970 | struct sn_hwperf_object_info *objbuf; | |
971 | ||
972 | if ((e = sn_hwperf_enum_objects(&nobj, &objbuf)) == 0) { | |
973 | e = sn_hwperf_get_nearest_node_objdata(objbuf, nobj, | |
974 | node, near_mem_node, near_cpu_node); | |
975 | vfree(objbuf); | |
976 | } | |
977 | ||
978 | return e; | |
979 | } | |
980 | ||
981 | static int __devinit sn_hwperf_misc_register_init(void) | |
982 | { | |
983 | int e; | |
984 | ||
f478af9d JS |
985 | if (!ia64_platform_is("sn2")) |
986 | return 0; | |
987 | ||
60a3ba0b MG |
988 | sn_hwperf_init(); |
989 | ||
990 | /* | |
991 | * Register a dynamic misc device for hwperf ioctls. Platforms | |
992 | * supporting hotplug will create /dev/sn_hwperf, else user | |
993 | * can to look up the minor number in /proc/misc. | |
994 | */ | |
995 | if ((e = misc_register(&sn_hwperf_dev)) != 0) { | |
996 | printk(KERN_ERR "sn_hwperf_misc_register_init: failed to " | |
997 | "register misc device for \"%s\"\n", sn_hwperf_dev.name); | |
998 | } | |
999 | ||
1000 | return e; | |
1001 | } | |
1002 | ||
1003 | device_initcall(sn_hwperf_misc_register_init); /* after misc_init() */ | |
1004 | EXPORT_SYMBOL(sn_hwperf_get_nearest_node); |