Commit | Line | Data |
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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 | 35 | #include <linux/smp.h> |
0245583a | 36 | #include <linux/mutex.h> |
a3bc0dbc | 37 | |
1da177e4 LT |
38 | #include <asm/processor.h> |
39 | #include <asm/topology.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); | |
0245583a | 53 | static DEFINE_MUTEX(sn_hwperf_init_mutex); |
1da177e4 | 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); | |
1aac0b57 JJ |
69 | objbuf = vmalloc(sz); |
70 | if (objbuf == NULL) { | |
1da177e4 LT |
71 | printk("sn_hwperf_enum_objects: vmalloc(%d) failed\n", (int)sz); |
72 | e = -ENOMEM; | |
73 | goto out; | |
74 | } | |
75 | ||
76 | e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, SN_HWPERF_ENUM_OBJECTS, | |
77 | 0, sz, (u64) objbuf, 0, 0, NULL); | |
78 | if (e != SN_HWPERF_OP_OK) { | |
79 | e = -EINVAL; | |
80 | vfree(objbuf); | |
81 | } | |
82 | ||
83 | out: | |
84 | *nobj = sn_hwperf_obj_cnt; | |
85 | *ret = objbuf; | |
86 | return e; | |
87 | } | |
88 | ||
4a5c13c7 MG |
89 | static int sn_hwperf_location_to_bpos(char *location, |
90 | int *rack, int *bay, int *slot, int *slab) | |
91 | { | |
92 | char type; | |
93 | ||
94 | /* first scan for an old style geoid string */ | |
95 | if (sscanf(location, "%03d%c%02d#%d", | |
96 | rack, &type, bay, slab) == 4) | |
97 | *slot = 0; | |
98 | else /* scan for a new bladed geoid string */ | |
99 | if (sscanf(location, "%03d%c%02d^%02d#%d", | |
100 | rack, &type, bay, slot, slab) != 5) | |
101 | return -1; | |
102 | /* success */ | |
103 | return 0; | |
104 | } | |
105 | ||
1da177e4 LT |
106 | static int sn_hwperf_geoid_to_cnode(char *location) |
107 | { | |
108 | int cnode; | |
109 | geoid_t geoid; | |
110 | moduleid_t module_id; | |
4a5c13c7 MG |
111 | int rack, bay, slot, slab; |
112 | int this_rack, this_bay, this_slot, this_slab; | |
1da177e4 | 113 | |
4a5c13c7 | 114 | if (sn_hwperf_location_to_bpos(location, &rack, &bay, &slot, &slab)) |
1da177e4 LT |
115 | return -1; |
116 | ||
769ebc66 DR |
117 | /* |
118 | * FIXME: replace with cleaner for_each_XXX macro which addresses | |
119 | * both compute and IO nodes once ACPI3.0 is available. | |
120 | */ | |
121 | for (cnode = 0; cnode < num_cnodes; cnode++) { | |
1da177e4 LT |
122 | geoid = cnodeid_get_geoid(cnode); |
123 | module_id = geo_module(geoid); | |
124 | this_rack = MODULE_GET_RACK(module_id); | |
4a5c13c7 | 125 | this_bay = MODULE_GET_BPOS(module_id); |
0985ea8f | 126 | this_slot = geo_slot(geoid); |
1da177e4 | 127 | this_slab = geo_slab(geoid); |
4a5c13c7 MG |
128 | if (rack == this_rack && bay == this_bay && |
129 | slot == this_slot && slab == this_slab) { | |
1da177e4 | 130 | break; |
4a5c13c7 | 131 | } |
1da177e4 LT |
132 | } |
133 | ||
a1d70577 | 134 | return cnode_possible(cnode) ? cnode : -1; |
1da177e4 LT |
135 | } |
136 | ||
137 | static int sn_hwperf_obj_to_cnode(struct sn_hwperf_object_info * obj) | |
138 | { | |
60a3ba0b MG |
139 | if (!SN_HWPERF_IS_NODE(obj) && !SN_HWPERF_IS_IONODE(obj)) |
140 | BUG(); | |
a1d70577 | 141 | if (SN_HWPERF_FOREIGN(obj)) |
1da177e4 LT |
142 | return -1; |
143 | return sn_hwperf_geoid_to_cnode(obj->location); | |
144 | } | |
145 | ||
146 | static int sn_hwperf_generic_ordinal(struct sn_hwperf_object_info *obj, | |
147 | struct sn_hwperf_object_info *objs) | |
148 | { | |
149 | int ordinal; | |
150 | struct sn_hwperf_object_info *p; | |
151 | ||
152 | for (ordinal=0, p=objs; p != obj; p++) { | |
153 | if (SN_HWPERF_FOREIGN(p)) | |
154 | continue; | |
155 | if (SN_HWPERF_SAME_OBJTYPE(p, obj)) | |
156 | ordinal++; | |
157 | } | |
158 | ||
159 | return ordinal; | |
160 | } | |
161 | ||
162 | static const char *slabname_node = "node"; /* SHub asic */ | |
163 | static const char *slabname_ionode = "ionode"; /* TIO asic */ | |
164 | static const char *slabname_router = "router"; /* NL3R or NL4R */ | |
165 | static const char *slabname_other = "other"; /* unknown asic */ | |
166 | ||
167 | static const char *sn_hwperf_get_slabname(struct sn_hwperf_object_info *obj, | |
168 | struct sn_hwperf_object_info *objs, int *ordinal) | |
169 | { | |
170 | int isnode; | |
171 | const char *slabname = slabname_other; | |
172 | ||
173 | if ((isnode = SN_HWPERF_IS_NODE(obj)) || SN_HWPERF_IS_IONODE(obj)) { | |
174 | slabname = isnode ? slabname_node : slabname_ionode; | |
175 | *ordinal = sn_hwperf_obj_to_cnode(obj); | |
176 | } | |
177 | else { | |
178 | *ordinal = sn_hwperf_generic_ordinal(obj, objs); | |
179 | if (SN_HWPERF_IS_ROUTER(obj)) | |
180 | slabname = slabname_router; | |
181 | } | |
182 | ||
183 | return slabname; | |
184 | } | |
185 | ||
ecc3c30a | 186 | static void print_pci_topology(struct seq_file *s) |
4a5c13c7 | 187 | { |
ecc3c30a MG |
188 | char *p; |
189 | size_t sz; | |
190 | int e; | |
191 | ||
192 | for (sz = PAGE_SIZE; sz < 16 * PAGE_SIZE; sz += PAGE_SIZE) { | |
5cbded58 | 193 | if (!(p = kmalloc(sz, GFP_KERNEL))) |
ecc3c30a MG |
194 | break; |
195 | e = ia64_sn_ioif_get_pci_topology(__pa(p), sz); | |
196 | if (e == SALRET_OK) | |
197 | seq_puts(s, p); | |
198 | kfree(p); | |
199 | if (e == SALRET_OK || e == SALRET_NOT_IMPLEMENTED) | |
200 | break; | |
4a5c13c7 MG |
201 | } |
202 | } | |
203 | ||
60a3ba0b MG |
204 | static inline int sn_hwperf_has_cpus(cnodeid_t node) |
205 | { | |
a1d70577 | 206 | return node < MAX_NUMNODES && node_online(node) && nr_cpus_node(node); |
60a3ba0b MG |
207 | } |
208 | ||
209 | static inline int sn_hwperf_has_mem(cnodeid_t node) | |
210 | { | |
a1d70577 | 211 | return node < MAX_NUMNODES && node_online(node) && NODE_DATA(node)->node_present_pages; |
60a3ba0b MG |
212 | } |
213 | ||
214 | static struct sn_hwperf_object_info * | |
215 | sn_hwperf_findobj_id(struct sn_hwperf_object_info *objbuf, | |
216 | int nobj, int id) | |
4a5c13c7 | 217 | { |
60a3ba0b MG |
218 | int i; |
219 | struct sn_hwperf_object_info *p = objbuf; | |
220 | ||
221 | for (i=0; i < nobj; i++, p++) { | |
222 | if (p->id == id) | |
223 | return p; | |
224 | } | |
225 | ||
226 | return NULL; | |
227 | ||
228 | } | |
229 | ||
230 | static int sn_hwperf_get_nearest_node_objdata(struct sn_hwperf_object_info *objbuf, | |
231 | int nobj, cnodeid_t node, cnodeid_t *near_mem_node, cnodeid_t *near_cpu_node) | |
232 | { | |
233 | int e; | |
234 | struct sn_hwperf_object_info *nodeobj = NULL; | |
235 | struct sn_hwperf_object_info *op; | |
236 | struct sn_hwperf_object_info *dest; | |
237 | struct sn_hwperf_object_info *router; | |
238 | struct sn_hwperf_port_info ptdata[16]; | |
239 | int sz, i, j; | |
240 | cnodeid_t c; | |
241 | int found_mem = 0; | |
242 | int found_cpu = 0; | |
243 | ||
a1d70577 | 244 | if (!cnode_possible(node)) |
60a3ba0b MG |
245 | return -EINVAL; |
246 | ||
247 | if (sn_hwperf_has_cpus(node)) { | |
248 | if (near_cpu_node) | |
249 | *near_cpu_node = node; | |
250 | found_cpu++; | |
251 | } | |
252 | ||
253 | if (sn_hwperf_has_mem(node)) { | |
254 | if (near_mem_node) | |
255 | *near_mem_node = node; | |
256 | found_mem++; | |
257 | } | |
258 | ||
259 | if (found_cpu && found_mem) | |
260 | return 0; /* trivially successful */ | |
261 | ||
262 | /* find the argument node object */ | |
263 | for (i=0, op=objbuf; i < nobj; i++, op++) { | |
264 | if (!SN_HWPERF_IS_NODE(op) && !SN_HWPERF_IS_IONODE(op)) | |
265 | continue; | |
266 | if (node == sn_hwperf_obj_to_cnode(op)) { | |
267 | nodeobj = op; | |
268 | break; | |
269 | } | |
270 | } | |
271 | if (!nodeobj) { | |
272 | e = -ENOENT; | |
273 | goto err; | |
274 | } | |
275 | ||
276 | /* get it's interconnect topology */ | |
277 | sz = op->ports * sizeof(struct sn_hwperf_port_info); | |
278 | if (sz > sizeof(ptdata)) | |
279 | BUG(); | |
280 | e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
281 | SN_HWPERF_ENUM_PORTS, nodeobj->id, sz, | |
282 | (u64)&ptdata, 0, 0, NULL); | |
283 | if (e != SN_HWPERF_OP_OK) { | |
284 | e = -EINVAL; | |
285 | goto err; | |
286 | } | |
287 | ||
288 | /* find nearest node with cpus and nearest memory */ | |
289 | for (router=NULL, j=0; j < op->ports; j++) { | |
290 | dest = sn_hwperf_findobj_id(objbuf, nobj, ptdata[j].conn_id); | |
f0fe253c JS |
291 | if (dest && SN_HWPERF_IS_ROUTER(dest)) |
292 | router = dest; | |
60a3ba0b MG |
293 | if (!dest || SN_HWPERF_FOREIGN(dest) || |
294 | !SN_HWPERF_IS_NODE(dest) || SN_HWPERF_IS_IONODE(dest)) { | |
295 | continue; | |
296 | } | |
297 | c = sn_hwperf_obj_to_cnode(dest); | |
298 | if (!found_cpu && sn_hwperf_has_cpus(c)) { | |
299 | if (near_cpu_node) | |
300 | *near_cpu_node = c; | |
301 | found_cpu++; | |
302 | } | |
303 | if (!found_mem && sn_hwperf_has_mem(c)) { | |
304 | if (near_mem_node) | |
305 | *near_mem_node = c; | |
306 | found_mem++; | |
307 | } | |
60a3ba0b MG |
308 | } |
309 | ||
310 | if (router && (!found_cpu || !found_mem)) { | |
311 | /* search for a node connected to the same router */ | |
312 | sz = router->ports * sizeof(struct sn_hwperf_port_info); | |
313 | if (sz > sizeof(ptdata)) | |
314 | BUG(); | |
315 | e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
316 | SN_HWPERF_ENUM_PORTS, router->id, sz, | |
317 | (u64)&ptdata, 0, 0, NULL); | |
318 | if (e != SN_HWPERF_OP_OK) { | |
319 | e = -EINVAL; | |
320 | goto err; | |
321 | } | |
322 | for (j=0; j < router->ports; j++) { | |
323 | dest = sn_hwperf_findobj_id(objbuf, nobj, | |
324 | ptdata[j].conn_id); | |
325 | if (!dest || dest->id == node || | |
326 | SN_HWPERF_FOREIGN(dest) || | |
327 | !SN_HWPERF_IS_NODE(dest) || | |
328 | SN_HWPERF_IS_IONODE(dest)) { | |
329 | continue; | |
330 | } | |
331 | c = sn_hwperf_obj_to_cnode(dest); | |
332 | if (!found_cpu && sn_hwperf_has_cpus(c)) { | |
333 | if (near_cpu_node) | |
334 | *near_cpu_node = c; | |
335 | found_cpu++; | |
336 | } | |
337 | if (!found_mem && sn_hwperf_has_mem(c)) { | |
338 | if (near_mem_node) | |
339 | *near_mem_node = c; | |
340 | found_mem++; | |
341 | } | |
342 | if (found_cpu && found_mem) | |
343 | break; | |
344 | } | |
345 | } | |
346 | ||
347 | if (!found_cpu || !found_mem) { | |
348 | /* resort to _any_ node with CPUs and memory */ | |
349 | for (i=0, op=objbuf; i < nobj; i++, op++) { | |
350 | if (SN_HWPERF_FOREIGN(op) || | |
351 | SN_HWPERF_IS_IONODE(op) || | |
352 | !SN_HWPERF_IS_NODE(op)) { | |
353 | continue; | |
354 | } | |
355 | c = sn_hwperf_obj_to_cnode(op); | |
356 | if (!found_cpu && sn_hwperf_has_cpus(c)) { | |
357 | if (near_cpu_node) | |
358 | *near_cpu_node = c; | |
359 | found_cpu++; | |
360 | } | |
361 | if (!found_mem && sn_hwperf_has_mem(c)) { | |
362 | if (near_mem_node) | |
363 | *near_mem_node = c; | |
364 | found_mem++; | |
365 | } | |
366 | if (found_cpu && found_mem) | |
0985ea8f | 367 | break; |
0985ea8f | 368 | } |
4a5c13c7 | 369 | } |
60a3ba0b MG |
370 | |
371 | if (!found_cpu || !found_mem) | |
372 | e = -ENODATA; | |
373 | ||
374 | err: | |
375 | return e; | |
4a5c13c7 MG |
376 | } |
377 | ||
60a3ba0b | 378 | |
1da177e4 LT |
379 | static int sn_topology_show(struct seq_file *s, void *d) |
380 | { | |
381 | int sz; | |
382 | int pt; | |
4a5c13c7 | 383 | int e = 0; |
1da177e4 LT |
384 | int i; |
385 | int j; | |
386 | const char *slabname; | |
387 | int ordinal; | |
388 | cpumask_t cpumask; | |
389 | char slice; | |
390 | struct cpuinfo_ia64 *c; | |
391 | struct sn_hwperf_port_info *ptdata; | |
392 | struct sn_hwperf_object_info *p; | |
393 | struct sn_hwperf_object_info *obj = d; /* this object */ | |
394 | struct sn_hwperf_object_info *objs = s->private; /* all objects */ | |
4a5c13c7 MG |
395 | u8 shubtype; |
396 | u8 system_size; | |
397 | u8 sharing_size; | |
398 | u8 partid; | |
399 | u8 coher; | |
400 | u8 nasid_shift; | |
401 | u8 region_size; | |
402 | u16 nasid_mask; | |
403 | int nasid_msb; | |
1da177e4 LT |
404 | |
405 | if (obj == objs) { | |
4a5c13c7 | 406 | seq_printf(s, "# sn_topology version 2\n"); |
1da177e4 LT |
407 | seq_printf(s, "# objtype ordinal location partition" |
408 | " [attribute value [, ...]]\n"); | |
4a5c13c7 MG |
409 | |
410 | if (ia64_sn_get_sn_info(0, | |
411 | &shubtype, &nasid_mask, &nasid_shift, &system_size, | |
412 | &sharing_size, &partid, &coher, ®ion_size)) | |
413 | BUG(); | |
414 | for (nasid_msb=63; nasid_msb > 0; nasid_msb--) { | |
415 | if (((u64)nasid_mask << nasid_shift) & (1ULL << nasid_msb)) | |
416 | break; | |
417 | } | |
418 | seq_printf(s, "partition %u %s local " | |
419 | "shubtype %s, " | |
420 | "nasid_mask 0x%016lx, " | |
421 | "nasid_bits %d:%d, " | |
422 | "system_size %d, " | |
423 | "sharing_size %d, " | |
424 | "coherency_domain %d, " | |
425 | "region_size %d\n", | |
426 | ||
e9ff3990 | 427 | partid, utsname()->nodename, |
4a5c13c7 MG |
428 | shubtype ? "shub2" : "shub1", |
429 | (u64)nasid_mask << nasid_shift, nasid_msb, nasid_shift, | |
430 | system_size, sharing_size, coher, region_size); | |
ecc3c30a MG |
431 | |
432 | print_pci_topology(s); | |
1da177e4 LT |
433 | } |
434 | ||
435 | if (SN_HWPERF_FOREIGN(obj)) { | |
436 | /* private in another partition: not interesting */ | |
437 | return 0; | |
438 | } | |
439 | ||
4a5c13c7 | 440 | for (i = 0; i < SN_HWPERF_MAXSTRING && obj->name[i]; i++) { |
1da177e4 LT |
441 | if (obj->name[i] == ' ') |
442 | obj->name[i] = '_'; | |
443 | } | |
444 | ||
445 | slabname = sn_hwperf_get_slabname(obj, objs, &ordinal); | |
446 | seq_printf(s, "%s %d %s %s asic %s", slabname, ordinal, obj->location, | |
447 | obj->sn_hwp_this_part ? "local" : "shared", obj->name); | |
448 | ||
a1d70577 | 449 | if (ordinal < 0 || (!SN_HWPERF_IS_NODE(obj) && !SN_HWPERF_IS_IONODE(obj))) |
1da177e4 LT |
450 | seq_putc(s, '\n'); |
451 | else { | |
60a3ba0b MG |
452 | cnodeid_t near_mem = -1; |
453 | cnodeid_t near_cpu = -1; | |
454 | ||
1da177e4 | 455 | seq_printf(s, ", nasid 0x%x", cnodeid_to_nasid(ordinal)); |
60a3ba0b MG |
456 | |
457 | if (sn_hwperf_get_nearest_node_objdata(objs, sn_hwperf_obj_cnt, | |
458 | ordinal, &near_mem, &near_cpu) == 0) { | |
459 | seq_printf(s, ", near_mem_nodeid %d, near_cpu_nodeid %d", | |
460 | near_mem, near_cpu); | |
461 | } | |
462 | ||
463 | if (!SN_HWPERF_IS_IONODE(obj)) { | |
464 | for_each_online_node(i) { | |
465 | seq_printf(s, i ? ":%d" : ", dist %d", | |
466 | node_distance(ordinal, i)); | |
467 | } | |
1da177e4 | 468 | } |
60a3ba0b | 469 | |
1da177e4 LT |
470 | seq_putc(s, '\n'); |
471 | ||
472 | /* | |
473 | * CPUs on this node, if any | |
474 | */ | |
a1d70577 JS |
475 | if (!SN_HWPERF_IS_IONODE(obj)) { |
476 | cpumask = node_to_cpumask(ordinal); | |
477 | for_each_online_cpu(i) { | |
478 | if (cpu_isset(i, cpumask)) { | |
479 | slice = 'a' + cpuid_to_slice(i); | |
480 | c = cpu_data(i); | |
481 | seq_printf(s, "cpu %d %s%c local" | |
482 | " freq %luMHz, arch ia64", | |
483 | i, obj->location, slice, | |
484 | c->proc_freq / 1000000); | |
485 | for_each_online_cpu(j) { | |
486 | seq_printf(s, j ? ":%d" : ", dist %d", | |
487 | node_distance( | |
488 | cpu_to_node(i), | |
489 | cpu_to_node(j))); | |
490 | } | |
491 | seq_putc(s, '\n'); | |
1da177e4 | 492 | } |
1da177e4 LT |
493 | } |
494 | } | |
495 | } | |
496 | ||
497 | if (obj->ports) { | |
498 | /* | |
499 | * numalink ports | |
500 | */ | |
501 | sz = obj->ports * sizeof(struct sn_hwperf_port_info); | |
dd4cb9f8 | 502 | if ((ptdata = kmalloc(sz, GFP_KERNEL)) == NULL) |
1da177e4 LT |
503 | return -ENOMEM; |
504 | e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
505 | SN_HWPERF_ENUM_PORTS, obj->id, sz, | |
506 | (u64) ptdata, 0, 0, NULL); | |
507 | if (e != SN_HWPERF_OP_OK) | |
508 | return -EINVAL; | |
509 | for (ordinal=0, p=objs; p != obj; p++) { | |
510 | if (!SN_HWPERF_FOREIGN(p)) | |
511 | ordinal += p->ports; | |
512 | } | |
513 | for (pt = 0; pt < obj->ports; pt++) { | |
514 | for (p = objs, i = 0; i < sn_hwperf_obj_cnt; i++, p++) { | |
515 | if (ptdata[pt].conn_id == p->id) { | |
516 | break; | |
517 | } | |
518 | } | |
519 | seq_printf(s, "numalink %d %s-%d", | |
520 | ordinal+pt, obj->location, ptdata[pt].port); | |
521 | ||
522 | if (i >= sn_hwperf_obj_cnt) { | |
523 | /* no connection */ | |
524 | seq_puts(s, " local endpoint disconnected" | |
525 | ", protocol unknown\n"); | |
526 | continue; | |
527 | } | |
528 | ||
529 | if (obj->sn_hwp_this_part && p->sn_hwp_this_part) | |
530 | /* both ends local to this partition */ | |
531 | seq_puts(s, " local"); | |
a1d70577 | 532 | else if (SN_HWPERF_FOREIGN(p)) |
1da177e4 LT |
533 | /* both ends of the link in foreign partiton */ |
534 | seq_puts(s, " foreign"); | |
535 | else | |
536 | /* link straddles a partition */ | |
537 | seq_puts(s, " shared"); | |
538 | ||
539 | /* | |
540 | * Unlikely, but strictly should query the LLP config | |
541 | * registers because an NL4R can be configured to run | |
542 | * NL3 protocol, even when not talking to an NL3 router. | |
543 | * Ditto for node-node. | |
544 | */ | |
545 | seq_printf(s, " endpoint %s-%d, protocol %s\n", | |
546 | p->location, ptdata[pt].conn_port, | |
547 | (SN_HWPERF_IS_NL3ROUTER(obj) || | |
548 | SN_HWPERF_IS_NL3ROUTER(p)) ? "LLP3" : "LLP4"); | |
549 | } | |
dd4cb9f8 | 550 | kfree(ptdata); |
1da177e4 LT |
551 | } |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
556 | static void *sn_topology_start(struct seq_file *s, loff_t * pos) | |
557 | { | |
558 | struct sn_hwperf_object_info *objs = s->private; | |
559 | ||
560 | if (*pos < sn_hwperf_obj_cnt) | |
561 | return (void *)(objs + *pos); | |
562 | ||
563 | return NULL; | |
564 | } | |
565 | ||
566 | static void *sn_topology_next(struct seq_file *s, void *v, loff_t * pos) | |
567 | { | |
568 | ++*pos; | |
569 | return sn_topology_start(s, pos); | |
570 | } | |
571 | ||
572 | static void sn_topology_stop(struct seq_file *m, void *v) | |
573 | { | |
574 | return; | |
575 | } | |
576 | ||
577 | /* | |
578 | * /proc/sgi_sn/sn_topology, read-only using seq_file | |
579 | */ | |
a23fe55e | 580 | static const struct seq_operations sn_topology_seq_ops = { |
1da177e4 LT |
581 | .start = sn_topology_start, |
582 | .next = sn_topology_next, | |
583 | .stop = sn_topology_stop, | |
584 | .show = sn_topology_show | |
585 | }; | |
586 | ||
587 | struct sn_hwperf_op_info { | |
588 | u64 op; | |
589 | struct sn_hwperf_ioctl_args *a; | |
590 | void *p; | |
591 | int *v0; | |
592 | int ret; | |
593 | }; | |
594 | ||
595 | static void sn_hwperf_call_sal(void *info) | |
596 | { | |
597 | struct sn_hwperf_op_info *op_info = info; | |
598 | int r; | |
599 | ||
600 | r = ia64_sn_hwperf_op(sn_hwperf_master_nasid, op_info->op, | |
601 | op_info->a->arg, op_info->a->sz, | |
602 | (u64) op_info->p, 0, 0, op_info->v0); | |
603 | op_info->ret = r; | |
604 | } | |
605 | ||
606 | static int sn_hwperf_op_cpu(struct sn_hwperf_op_info *op_info) | |
607 | { | |
608 | u32 cpu; | |
609 | u32 use_ipi; | |
610 | int r = 0; | |
611 | cpumask_t save_allowed; | |
612 | ||
613 | cpu = (op_info->a->arg & SN_HWPERF_ARG_CPU_MASK) >> 32; | |
614 | use_ipi = op_info->a->arg & SN_HWPERF_ARG_USE_IPI_MASK; | |
615 | op_info->a->arg &= SN_HWPERF_ARG_OBJID_MASK; | |
616 | ||
617 | if (cpu != SN_HWPERF_ARG_ANY_CPU) { | |
e6ef0fca | 618 | if (cpu >= NR_CPUS || !cpu_online(cpu)) { |
1da177e4 LT |
619 | r = -EINVAL; |
620 | goto out; | |
621 | } | |
622 | } | |
623 | ||
624 | if (cpu == SN_HWPERF_ARG_ANY_CPU || cpu == get_cpu()) { | |
625 | /* don't care, or already on correct cpu */ | |
626 | sn_hwperf_call_sal(op_info); | |
627 | } | |
628 | else { | |
629 | if (use_ipi) { | |
630 | /* use an interprocessor interrupt to call SAL */ | |
631 | smp_call_function_single(cpu, sn_hwperf_call_sal, | |
632 | op_info, 1, 1); | |
633 | } | |
634 | else { | |
635 | /* migrate the task before calling SAL */ | |
636 | save_allowed = current->cpus_allowed; | |
637 | set_cpus_allowed(current, cpumask_of_cpu(cpu)); | |
638 | sn_hwperf_call_sal(op_info); | |
639 | set_cpus_allowed(current, save_allowed); | |
640 | } | |
641 | } | |
642 | r = op_info->ret; | |
643 | ||
644 | out: | |
645 | return r; | |
646 | } | |
647 | ||
648 | /* map SAL hwperf error code to system error code */ | |
649 | static int sn_hwperf_map_err(int hwperf_err) | |
650 | { | |
651 | int e; | |
652 | ||
653 | switch(hwperf_err) { | |
654 | case SN_HWPERF_OP_OK: | |
655 | e = 0; | |
656 | break; | |
657 | ||
658 | case SN_HWPERF_OP_NOMEM: | |
659 | e = -ENOMEM; | |
660 | break; | |
661 | ||
662 | case SN_HWPERF_OP_NO_PERM: | |
663 | e = -EPERM; | |
664 | break; | |
665 | ||
666 | case SN_HWPERF_OP_IO_ERROR: | |
667 | e = -EIO; | |
668 | break; | |
669 | ||
670 | case SN_HWPERF_OP_BUSY: | |
4a5c13c7 MG |
671 | e = -EBUSY; |
672 | break; | |
673 | ||
1da177e4 LT |
674 | case SN_HWPERF_OP_RECONFIGURE: |
675 | e = -EAGAIN; | |
676 | break; | |
677 | ||
678 | case SN_HWPERF_OP_INVAL: | |
679 | default: | |
680 | e = -EINVAL; | |
681 | break; | |
682 | } | |
683 | ||
684 | return e; | |
685 | } | |
686 | ||
687 | /* | |
688 | * ioctl for "sn_hwperf" misc device | |
689 | */ | |
690 | static int | |
691 | sn_hwperf_ioctl(struct inode *in, struct file *fp, u32 op, u64 arg) | |
692 | { | |
693 | struct sn_hwperf_ioctl_args a; | |
694 | struct cpuinfo_ia64 *cdata; | |
695 | struct sn_hwperf_object_info *objs; | |
696 | struct sn_hwperf_object_info *cpuobj; | |
697 | struct sn_hwperf_op_info op_info; | |
698 | void *p = NULL; | |
699 | int nobj; | |
700 | char slice; | |
701 | int node; | |
702 | int r; | |
703 | int v0; | |
704 | int i; | |
705 | int j; | |
706 | ||
707 | unlock_kernel(); | |
708 | ||
709 | /* only user requests are allowed here */ | |
710 | if ((op & SN_HWPERF_OP_MASK) < 10) { | |
711 | r = -EINVAL; | |
712 | goto error; | |
713 | } | |
714 | r = copy_from_user(&a, (const void __user *)arg, | |
715 | sizeof(struct sn_hwperf_ioctl_args)); | |
716 | if (r != 0) { | |
717 | r = -EFAULT; | |
718 | goto error; | |
719 | } | |
720 | ||
721 | /* | |
722 | * Allocate memory to hold a kernel copy of the user buffer. The | |
723 | * buffer contents are either copied in or out (or both) of user | |
724 | * space depending on the flags encoded in the requested operation. | |
725 | */ | |
726 | if (a.ptr) { | |
727 | p = vmalloc(a.sz); | |
728 | if (!p) { | |
729 | r = -ENOMEM; | |
730 | goto error; | |
731 | } | |
732 | } | |
733 | ||
734 | if (op & SN_HWPERF_OP_MEM_COPYIN) { | |
735 | r = copy_from_user(p, (const void __user *)a.ptr, a.sz); | |
736 | if (r != 0) { | |
737 | r = -EFAULT; | |
738 | goto error; | |
739 | } | |
740 | } | |
741 | ||
742 | switch (op) { | |
743 | case SN_HWPERF_GET_CPU_INFO: | |
744 | if (a.sz == sizeof(u64)) { | |
745 | /* special case to get size needed */ | |
746 | *(u64 *) p = (u64) num_online_cpus() * | |
747 | sizeof(struct sn_hwperf_object_info); | |
748 | } else | |
749 | if (a.sz < num_online_cpus() * sizeof(struct sn_hwperf_object_info)) { | |
750 | r = -ENOMEM; | |
751 | goto error; | |
752 | } else | |
753 | if ((r = sn_hwperf_enum_objects(&nobj, &objs)) == 0) { | |
83e12a07 MG |
754 | int cpuobj_index = 0; |
755 | ||
1da177e4 LT |
756 | memset(p, 0, a.sz); |
757 | for (i = 0; i < nobj; i++) { | |
60a3ba0b MG |
758 | if (!SN_HWPERF_IS_NODE(objs + i)) |
759 | continue; | |
1da177e4 LT |
760 | node = sn_hwperf_obj_to_cnode(objs + i); |
761 | for_each_online_cpu(j) { | |
762 | if (node != cpu_to_node(j)) | |
763 | continue; | |
090de0b7 | 764 | cpuobj = (struct sn_hwperf_object_info *) p + cpuobj_index++; |
1da177e4 LT |
765 | slice = 'a' + cpuid_to_slice(j); |
766 | cdata = cpu_data(j); | |
767 | cpuobj->id = j; | |
768 | snprintf(cpuobj->name, | |
769 | sizeof(cpuobj->name), | |
770 | "CPU %luMHz %s", | |
771 | cdata->proc_freq / 1000000, | |
772 | cdata->vendor); | |
773 | snprintf(cpuobj->location, | |
774 | sizeof(cpuobj->location), | |
775 | "%s%c", objs[i].location, | |
776 | slice); | |
777 | } | |
778 | } | |
779 | ||
780 | vfree(objs); | |
781 | } | |
782 | break; | |
783 | ||
784 | case SN_HWPERF_GET_NODE_NASID: | |
785 | if (a.sz != sizeof(u64) || | |
a1d70577 | 786 | (node = a.arg) < 0 || !cnode_possible(node)) { |
1da177e4 LT |
787 | r = -EINVAL; |
788 | goto error; | |
789 | } | |
790 | *(u64 *)p = (u64)cnodeid_to_nasid(node); | |
791 | break; | |
792 | ||
793 | case SN_HWPERF_GET_OBJ_NODE: | |
794 | if (a.sz != sizeof(u64) || a.arg < 0) { | |
795 | r = -EINVAL; | |
796 | goto error; | |
797 | } | |
798 | if ((r = sn_hwperf_enum_objects(&nobj, &objs)) == 0) { | |
799 | if (a.arg >= nobj) { | |
800 | r = -EINVAL; | |
801 | vfree(objs); | |
802 | goto error; | |
803 | } | |
804 | if (objs[(i = a.arg)].id != a.arg) { | |
805 | for (i = 0; i < nobj; i++) { | |
806 | if (objs[i].id == a.arg) | |
807 | break; | |
808 | } | |
809 | } | |
810 | if (i == nobj) { | |
811 | r = -EINVAL; | |
812 | vfree(objs); | |
813 | goto error; | |
814 | } | |
60a3ba0b MG |
815 | |
816 | if (!SN_HWPERF_IS_NODE(objs + i) && | |
817 | !SN_HWPERF_IS_IONODE(objs + i)) { | |
818 | r = -ENOENT; | |
819 | vfree(objs); | |
820 | goto error; | |
821 | } | |
822 | ||
1da177e4 LT |
823 | *(u64 *)p = (u64)sn_hwperf_obj_to_cnode(objs + i); |
824 | vfree(objs); | |
825 | } | |
826 | break; | |
827 | ||
828 | case SN_HWPERF_GET_MMRS: | |
829 | case SN_HWPERF_SET_MMRS: | |
830 | case SN_HWPERF_OBJECT_DISTANCE: | |
831 | op_info.p = p; | |
832 | op_info.a = &a; | |
833 | op_info.v0 = &v0; | |
834 | op_info.op = op; | |
835 | r = sn_hwperf_op_cpu(&op_info); | |
836 | if (r) { | |
837 | r = sn_hwperf_map_err(r); | |
4a5c13c7 | 838 | a.v0 = v0; |
1da177e4 LT |
839 | goto error; |
840 | } | |
841 | break; | |
842 | ||
843 | default: | |
844 | /* all other ops are a direct SAL call */ | |
845 | r = ia64_sn_hwperf_op(sn_hwperf_master_nasid, op, | |
846 | a.arg, a.sz, (u64) p, 0, 0, &v0); | |
847 | if (r) { | |
848 | r = sn_hwperf_map_err(r); | |
849 | goto error; | |
850 | } | |
851 | a.v0 = v0; | |
852 | break; | |
853 | } | |
854 | ||
855 | if (op & SN_HWPERF_OP_MEM_COPYOUT) { | |
856 | r = copy_to_user((void __user *)a.ptr, p, a.sz); | |
857 | if (r != 0) { | |
858 | r = -EFAULT; | |
859 | goto error; | |
860 | } | |
861 | } | |
862 | ||
863 | error: | |
864 | vfree(p); | |
865 | ||
866 | lock_kernel(); | |
867 | return r; | |
868 | } | |
869 | ||
5dfe4c96 | 870 | static const struct file_operations sn_hwperf_fops = { |
1da177e4 LT |
871 | .ioctl = sn_hwperf_ioctl, |
872 | }; | |
873 | ||
874 | static struct miscdevice sn_hwperf_dev = { | |
875 | MISC_DYNAMIC_MINOR, | |
876 | "sn_hwperf", | |
877 | &sn_hwperf_fops | |
878 | }; | |
879 | ||
880 | static int sn_hwperf_init(void) | |
881 | { | |
882 | u64 v; | |
883 | int salr; | |
884 | int e = 0; | |
885 | ||
886 | /* single threaded, once-only initialization */ | |
0245583a | 887 | mutex_lock(&sn_hwperf_init_mutex); |
60a3ba0b | 888 | |
1da177e4 | 889 | if (sn_hwperf_salheap) { |
0245583a | 890 | mutex_unlock(&sn_hwperf_init_mutex); |
1da177e4 LT |
891 | return e; |
892 | } | |
893 | ||
894 | /* | |
895 | * The PROM code needs a fixed reference node. For convenience the | |
896 | * same node as the console I/O is used. | |
897 | */ | |
898 | sn_hwperf_master_nasid = (nasid_t) ia64_sn_get_console_nasid(); | |
899 | ||
900 | /* | |
901 | * Request the needed size and install the PROM scratch area. | |
902 | * The PROM keeps various tracking bits in this memory area. | |
903 | */ | |
904 | salr = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
905 | (u64) SN_HWPERF_GET_HEAPSIZE, 0, | |
906 | (u64) sizeof(u64), (u64) &v, 0, 0, NULL); | |
907 | if (salr != SN_HWPERF_OP_OK) { | |
908 | e = -EINVAL; | |
909 | goto out; | |
910 | } | |
911 | ||
912 | if ((sn_hwperf_salheap = vmalloc(v)) == NULL) { | |
913 | e = -ENOMEM; | |
914 | goto out; | |
915 | } | |
916 | salr = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
917 | SN_HWPERF_INSTALL_HEAP, 0, v, | |
918 | (u64) sn_hwperf_salheap, 0, 0, NULL); | |
919 | if (salr != SN_HWPERF_OP_OK) { | |
920 | e = -EINVAL; | |
921 | goto out; | |
922 | } | |
923 | ||
924 | salr = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
925 | SN_HWPERF_OBJECT_COUNT, 0, | |
926 | sizeof(u64), (u64) &v, 0, 0, NULL); | |
927 | if (salr != SN_HWPERF_OP_OK) { | |
928 | e = -EINVAL; | |
929 | goto out; | |
930 | } | |
931 | sn_hwperf_obj_cnt = (int)v; | |
932 | ||
933 | out: | |
934 | if (e < 0 && sn_hwperf_salheap) { | |
935 | vfree(sn_hwperf_salheap); | |
936 | sn_hwperf_salheap = NULL; | |
937 | sn_hwperf_obj_cnt = 0; | |
938 | } | |
0245583a | 939 | mutex_unlock(&sn_hwperf_init_mutex); |
1da177e4 LT |
940 | return e; |
941 | } | |
942 | ||
943 | int sn_topology_open(struct inode *inode, struct file *file) | |
944 | { | |
945 | int e; | |
946 | struct seq_file *seq; | |
947 | struct sn_hwperf_object_info *objbuf; | |
948 | int nobj; | |
949 | ||
950 | if ((e = sn_hwperf_enum_objects(&nobj, &objbuf)) == 0) { | |
951 | e = seq_open(file, &sn_topology_seq_ops); | |
952 | seq = file->private_data; | |
953 | seq->private = objbuf; | |
954 | } | |
955 | ||
956 | return e; | |
957 | } | |
958 | ||
959 | int sn_topology_release(struct inode *inode, struct file *file) | |
960 | { | |
961 | struct seq_file *seq = file->private_data; | |
962 | ||
963 | vfree(seq->private); | |
964 | return seq_release(inode, file); | |
965 | } | |
60a3ba0b MG |
966 | |
967 | int sn_hwperf_get_nearest_node(cnodeid_t node, | |
968 | cnodeid_t *near_mem_node, cnodeid_t *near_cpu_node) | |
969 | { | |
970 | int e; | |
971 | int nobj; | |
972 | struct sn_hwperf_object_info *objbuf; | |
973 | ||
974 | if ((e = sn_hwperf_enum_objects(&nobj, &objbuf)) == 0) { | |
975 | e = sn_hwperf_get_nearest_node_objdata(objbuf, nobj, | |
976 | node, near_mem_node, near_cpu_node); | |
977 | vfree(objbuf); | |
978 | } | |
979 | ||
980 | return e; | |
981 | } | |
982 | ||
983 | static int __devinit sn_hwperf_misc_register_init(void) | |
984 | { | |
985 | int e; | |
986 | ||
f478af9d JS |
987 | if (!ia64_platform_is("sn2")) |
988 | return 0; | |
989 | ||
60a3ba0b MG |
990 | sn_hwperf_init(); |
991 | ||
992 | /* | |
993 | * Register a dynamic misc device for hwperf ioctls. Platforms | |
994 | * supporting hotplug will create /dev/sn_hwperf, else user | |
995 | * can to look up the minor number in /proc/misc. | |
996 | */ | |
997 | if ((e = misc_register(&sn_hwperf_dev)) != 0) { | |
998 | printk(KERN_ERR "sn_hwperf_misc_register_init: failed to " | |
999 | "register misc device for \"%s\"\n", sn_hwperf_dev.name); | |
1000 | } | |
1001 | ||
1002 | return e; | |
1003 | } | |
1004 | ||
1005 | device_initcall(sn_hwperf_misc_register_init); /* after misc_init() */ | |
1006 | EXPORT_SYMBOL(sn_hwperf_get_nearest_node); |