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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 | 32 | #include <linux/cpumask.h> |
1da177e4 | 33 | #include <linux/nodemask.h> |
a3bc0dbc | 34 | #include <linux/smp.h> |
0245583a | 35 | #include <linux/mutex.h> |
a3bc0dbc | 36 | |
1da177e4 LT |
37 | #include <asm/processor.h> |
38 | #include <asm/topology.h> | |
1da177e4 LT |
39 | #include <asm/uaccess.h> |
40 | #include <asm/sal.h> | |
41 | #include <asm/sn/io.h> | |
42 | #include <asm/sn/sn_sal.h> | |
43 | #include <asm/sn/module.h> | |
44 | #include <asm/sn/geo.h> | |
45 | #include <asm/sn/sn2/sn_hwperf.h> | |
4a5c13c7 | 46 | #include <asm/sn/addrs.h> |
1da177e4 LT |
47 | |
48 | static void *sn_hwperf_salheap = NULL; | |
49 | static int sn_hwperf_obj_cnt = 0; | |
50 | static nasid_t sn_hwperf_master_nasid = INVALID_NASID; | |
51 | static int sn_hwperf_init(void); | |
0245583a | 52 | static DEFINE_MUTEX(sn_hwperf_init_mutex); |
1da177e4 | 53 | |
a1d70577 JS |
54 | #define cnode_possible(n) ((n) < num_cnodes) |
55 | ||
1da177e4 LT |
56 | static int sn_hwperf_enum_objects(int *nobj, struct sn_hwperf_object_info **ret) |
57 | { | |
58 | int e; | |
59 | u64 sz; | |
60 | struct sn_hwperf_object_info *objbuf = NULL; | |
61 | ||
62 | if ((e = sn_hwperf_init()) < 0) { | |
60a3ba0b | 63 | printk(KERN_ERR "sn_hwperf_init failed: err %d\n", e); |
1da177e4 LT |
64 | goto out; |
65 | } | |
66 | ||
67 | sz = sn_hwperf_obj_cnt * sizeof(struct sn_hwperf_object_info); | |
1aac0b57 JJ |
68 | objbuf = vmalloc(sz); |
69 | if (objbuf == NULL) { | |
1da177e4 LT |
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) { | |
5cbded58 | 192 | if (!(p = kmalloc(sz, GFP_KERNEL))) |
ecc3c30a MG |
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); | |
80a03e29 | 277 | BUG_ON(sz > sizeof(ptdata)); |
60a3ba0b MG |
278 | e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, |
279 | SN_HWPERF_ENUM_PORTS, nodeobj->id, sz, | |
280 | (u64)&ptdata, 0, 0, NULL); | |
281 | if (e != SN_HWPERF_OP_OK) { | |
282 | e = -EINVAL; | |
283 | goto err; | |
284 | } | |
285 | ||
286 | /* find nearest node with cpus and nearest memory */ | |
287 | for (router=NULL, j=0; j < op->ports; j++) { | |
288 | dest = sn_hwperf_findobj_id(objbuf, nobj, ptdata[j].conn_id); | |
f0fe253c JS |
289 | if (dest && SN_HWPERF_IS_ROUTER(dest)) |
290 | router = dest; | |
60a3ba0b MG |
291 | if (!dest || SN_HWPERF_FOREIGN(dest) || |
292 | !SN_HWPERF_IS_NODE(dest) || SN_HWPERF_IS_IONODE(dest)) { | |
293 | continue; | |
294 | } | |
295 | c = sn_hwperf_obj_to_cnode(dest); | |
296 | if (!found_cpu && sn_hwperf_has_cpus(c)) { | |
297 | if (near_cpu_node) | |
298 | *near_cpu_node = c; | |
299 | found_cpu++; | |
300 | } | |
301 | if (!found_mem && sn_hwperf_has_mem(c)) { | |
302 | if (near_mem_node) | |
303 | *near_mem_node = c; | |
304 | found_mem++; | |
305 | } | |
60a3ba0b MG |
306 | } |
307 | ||
308 | if (router && (!found_cpu || !found_mem)) { | |
309 | /* search for a node connected to the same router */ | |
310 | sz = router->ports * sizeof(struct sn_hwperf_port_info); | |
80a03e29 | 311 | BUG_ON(sz > sizeof(ptdata)); |
60a3ba0b MG |
312 | e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, |
313 | SN_HWPERF_ENUM_PORTS, router->id, sz, | |
314 | (u64)&ptdata, 0, 0, NULL); | |
315 | if (e != SN_HWPERF_OP_OK) { | |
316 | e = -EINVAL; | |
317 | goto err; | |
318 | } | |
319 | for (j=0; j < router->ports; j++) { | |
320 | dest = sn_hwperf_findobj_id(objbuf, nobj, | |
321 | ptdata[j].conn_id); | |
322 | if (!dest || dest->id == node || | |
323 | SN_HWPERF_FOREIGN(dest) || | |
324 | !SN_HWPERF_IS_NODE(dest) || | |
325 | SN_HWPERF_IS_IONODE(dest)) { | |
326 | continue; | |
327 | } | |
328 | c = sn_hwperf_obj_to_cnode(dest); | |
329 | if (!found_cpu && sn_hwperf_has_cpus(c)) { | |
330 | if (near_cpu_node) | |
331 | *near_cpu_node = c; | |
332 | found_cpu++; | |
333 | } | |
334 | if (!found_mem && sn_hwperf_has_mem(c)) { | |
335 | if (near_mem_node) | |
336 | *near_mem_node = c; | |
337 | found_mem++; | |
338 | } | |
339 | if (found_cpu && found_mem) | |
340 | break; | |
341 | } | |
342 | } | |
343 | ||
344 | if (!found_cpu || !found_mem) { | |
345 | /* resort to _any_ node with CPUs and memory */ | |
346 | for (i=0, op=objbuf; i < nobj; i++, op++) { | |
347 | if (SN_HWPERF_FOREIGN(op) || | |
348 | SN_HWPERF_IS_IONODE(op) || | |
349 | !SN_HWPERF_IS_NODE(op)) { | |
350 | continue; | |
351 | } | |
352 | c = sn_hwperf_obj_to_cnode(op); | |
353 | if (!found_cpu && sn_hwperf_has_cpus(c)) { | |
354 | if (near_cpu_node) | |
355 | *near_cpu_node = c; | |
356 | found_cpu++; | |
357 | } | |
358 | if (!found_mem && sn_hwperf_has_mem(c)) { | |
359 | if (near_mem_node) | |
360 | *near_mem_node = c; | |
361 | found_mem++; | |
362 | } | |
363 | if (found_cpu && found_mem) | |
0985ea8f | 364 | break; |
0985ea8f | 365 | } |
4a5c13c7 | 366 | } |
60a3ba0b MG |
367 | |
368 | if (!found_cpu || !found_mem) | |
369 | e = -ENODATA; | |
370 | ||
371 | err: | |
372 | return e; | |
4a5c13c7 MG |
373 | } |
374 | ||
60a3ba0b | 375 | |
1da177e4 LT |
376 | static int sn_topology_show(struct seq_file *s, void *d) |
377 | { | |
378 | int sz; | |
379 | int pt; | |
4a5c13c7 | 380 | int e = 0; |
1da177e4 LT |
381 | int i; |
382 | int j; | |
383 | const char *slabname; | |
384 | int ordinal; | |
1da177e4 LT |
385 | char slice; |
386 | struct cpuinfo_ia64 *c; | |
387 | struct sn_hwperf_port_info *ptdata; | |
388 | struct sn_hwperf_object_info *p; | |
389 | struct sn_hwperf_object_info *obj = d; /* this object */ | |
390 | struct sn_hwperf_object_info *objs = s->private; /* all objects */ | |
4a5c13c7 MG |
391 | u8 shubtype; |
392 | u8 system_size; | |
393 | u8 sharing_size; | |
394 | u8 partid; | |
395 | u8 coher; | |
396 | u8 nasid_shift; | |
397 | u8 region_size; | |
398 | u16 nasid_mask; | |
399 | int nasid_msb; | |
1da177e4 LT |
400 | |
401 | if (obj == objs) { | |
4a5c13c7 | 402 | seq_printf(s, "# sn_topology version 2\n"); |
1da177e4 LT |
403 | seq_printf(s, "# objtype ordinal location partition" |
404 | " [attribute value [, ...]]\n"); | |
4a5c13c7 MG |
405 | |
406 | if (ia64_sn_get_sn_info(0, | |
407 | &shubtype, &nasid_mask, &nasid_shift, &system_size, | |
408 | &sharing_size, &partid, &coher, ®ion_size)) | |
409 | BUG(); | |
410 | for (nasid_msb=63; nasid_msb > 0; nasid_msb--) { | |
411 | if (((u64)nasid_mask << nasid_shift) & (1ULL << nasid_msb)) | |
412 | break; | |
413 | } | |
414 | seq_printf(s, "partition %u %s local " | |
415 | "shubtype %s, " | |
e088a4ad | 416 | "nasid_mask 0x%016llx, " |
4a5c13c7 MG |
417 | "nasid_bits %d:%d, " |
418 | "system_size %d, " | |
419 | "sharing_size %d, " | |
420 | "coherency_domain %d, " | |
421 | "region_size %d\n", | |
422 | ||
e9ff3990 | 423 | partid, utsname()->nodename, |
4a5c13c7 MG |
424 | shubtype ? "shub2" : "shub1", |
425 | (u64)nasid_mask << nasid_shift, nasid_msb, nasid_shift, | |
426 | system_size, sharing_size, coher, region_size); | |
ecc3c30a MG |
427 | |
428 | print_pci_topology(s); | |
1da177e4 LT |
429 | } |
430 | ||
431 | if (SN_HWPERF_FOREIGN(obj)) { | |
432 | /* private in another partition: not interesting */ | |
433 | return 0; | |
434 | } | |
435 | ||
4a5c13c7 | 436 | for (i = 0; i < SN_HWPERF_MAXSTRING && obj->name[i]; i++) { |
1da177e4 LT |
437 | if (obj->name[i] == ' ') |
438 | obj->name[i] = '_'; | |
439 | } | |
440 | ||
441 | slabname = sn_hwperf_get_slabname(obj, objs, &ordinal); | |
442 | seq_printf(s, "%s %d %s %s asic %s", slabname, ordinal, obj->location, | |
443 | obj->sn_hwp_this_part ? "local" : "shared", obj->name); | |
444 | ||
a1d70577 | 445 | if (ordinal < 0 || (!SN_HWPERF_IS_NODE(obj) && !SN_HWPERF_IS_IONODE(obj))) |
1da177e4 LT |
446 | seq_putc(s, '\n'); |
447 | else { | |
60a3ba0b MG |
448 | cnodeid_t near_mem = -1; |
449 | cnodeid_t near_cpu = -1; | |
450 | ||
1da177e4 | 451 | seq_printf(s, ", nasid 0x%x", cnodeid_to_nasid(ordinal)); |
60a3ba0b MG |
452 | |
453 | if (sn_hwperf_get_nearest_node_objdata(objs, sn_hwperf_obj_cnt, | |
454 | ordinal, &near_mem, &near_cpu) == 0) { | |
455 | seq_printf(s, ", near_mem_nodeid %d, near_cpu_nodeid %d", | |
456 | near_mem, near_cpu); | |
457 | } | |
458 | ||
459 | if (!SN_HWPERF_IS_IONODE(obj)) { | |
460 | for_each_online_node(i) { | |
461 | seq_printf(s, i ? ":%d" : ", dist %d", | |
462 | node_distance(ordinal, i)); | |
463 | } | |
1da177e4 | 464 | } |
60a3ba0b | 465 | |
1da177e4 LT |
466 | seq_putc(s, '\n'); |
467 | ||
468 | /* | |
469 | * CPUs on this node, if any | |
470 | */ | |
a1d70577 | 471 | if (!SN_HWPERF_IS_IONODE(obj)) { |
fbb776c3 RR |
472 | for_each_cpu_and(i, cpu_online_mask, |
473 | cpumask_of_node(ordinal)) { | |
474 | slice = 'a' + cpuid_to_slice(i); | |
475 | c = cpu_data(i); | |
476 | seq_printf(s, "cpu %d %s%c local" | |
477 | " freq %luMHz, arch ia64", | |
478 | i, obj->location, slice, | |
479 | c->proc_freq / 1000000); | |
480 | for_each_online_cpu(j) { | |
481 | seq_printf(s, j ? ":%d" : ", dist %d", | |
482 | node_distance( | |
a1d70577 JS |
483 | cpu_to_node(i), |
484 | cpu_to_node(j))); | |
1da177e4 | 485 | } |
fbb776c3 | 486 | seq_putc(s, '\n'); |
1da177e4 LT |
487 | } |
488 | } | |
489 | } | |
490 | ||
491 | if (obj->ports) { | |
492 | /* | |
493 | * numalink ports | |
494 | */ | |
495 | sz = obj->ports * sizeof(struct sn_hwperf_port_info); | |
dd4cb9f8 | 496 | if ((ptdata = kmalloc(sz, GFP_KERNEL)) == NULL) |
1da177e4 LT |
497 | return -ENOMEM; |
498 | e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
499 | SN_HWPERF_ENUM_PORTS, obj->id, sz, | |
500 | (u64) ptdata, 0, 0, NULL); | |
501 | if (e != SN_HWPERF_OP_OK) | |
502 | return -EINVAL; | |
503 | for (ordinal=0, p=objs; p != obj; p++) { | |
504 | if (!SN_HWPERF_FOREIGN(p)) | |
505 | ordinal += p->ports; | |
506 | } | |
507 | for (pt = 0; pt < obj->ports; pt++) { | |
508 | for (p = objs, i = 0; i < sn_hwperf_obj_cnt; i++, p++) { | |
509 | if (ptdata[pt].conn_id == p->id) { | |
510 | break; | |
511 | } | |
512 | } | |
513 | seq_printf(s, "numalink %d %s-%d", | |
514 | ordinal+pt, obj->location, ptdata[pt].port); | |
515 | ||
516 | if (i >= sn_hwperf_obj_cnt) { | |
517 | /* no connection */ | |
518 | seq_puts(s, " local endpoint disconnected" | |
519 | ", protocol unknown\n"); | |
520 | continue; | |
521 | } | |
522 | ||
523 | if (obj->sn_hwp_this_part && p->sn_hwp_this_part) | |
524 | /* both ends local to this partition */ | |
525 | seq_puts(s, " local"); | |
a1d70577 | 526 | else if (SN_HWPERF_FOREIGN(p)) |
1da177e4 LT |
527 | /* both ends of the link in foreign partiton */ |
528 | seq_puts(s, " foreign"); | |
529 | else | |
530 | /* link straddles a partition */ | |
531 | seq_puts(s, " shared"); | |
532 | ||
533 | /* | |
534 | * Unlikely, but strictly should query the LLP config | |
535 | * registers because an NL4R can be configured to run | |
536 | * NL3 protocol, even when not talking to an NL3 router. | |
537 | * Ditto for node-node. | |
538 | */ | |
539 | seq_printf(s, " endpoint %s-%d, protocol %s\n", | |
540 | p->location, ptdata[pt].conn_port, | |
541 | (SN_HWPERF_IS_NL3ROUTER(obj) || | |
542 | SN_HWPERF_IS_NL3ROUTER(p)) ? "LLP3" : "LLP4"); | |
543 | } | |
dd4cb9f8 | 544 | kfree(ptdata); |
1da177e4 LT |
545 | } |
546 | ||
547 | return 0; | |
548 | } | |
549 | ||
550 | static void *sn_topology_start(struct seq_file *s, loff_t * pos) | |
551 | { | |
552 | struct sn_hwperf_object_info *objs = s->private; | |
553 | ||
554 | if (*pos < sn_hwperf_obj_cnt) | |
555 | return (void *)(objs + *pos); | |
556 | ||
557 | return NULL; | |
558 | } | |
559 | ||
560 | static void *sn_topology_next(struct seq_file *s, void *v, loff_t * pos) | |
561 | { | |
562 | ++*pos; | |
563 | return sn_topology_start(s, pos); | |
564 | } | |
565 | ||
566 | static void sn_topology_stop(struct seq_file *m, void *v) | |
567 | { | |
568 | return; | |
569 | } | |
570 | ||
571 | /* | |
572 | * /proc/sgi_sn/sn_topology, read-only using seq_file | |
573 | */ | |
a23fe55e | 574 | static const struct seq_operations sn_topology_seq_ops = { |
1da177e4 LT |
575 | .start = sn_topology_start, |
576 | .next = sn_topology_next, | |
577 | .stop = sn_topology_stop, | |
578 | .show = sn_topology_show | |
579 | }; | |
580 | ||
581 | struct sn_hwperf_op_info { | |
582 | u64 op; | |
583 | struct sn_hwperf_ioctl_args *a; | |
584 | void *p; | |
585 | int *v0; | |
586 | int ret; | |
587 | }; | |
588 | ||
589 | static void sn_hwperf_call_sal(void *info) | |
590 | { | |
591 | struct sn_hwperf_op_info *op_info = info; | |
592 | int r; | |
593 | ||
594 | r = ia64_sn_hwperf_op(sn_hwperf_master_nasid, op_info->op, | |
595 | op_info->a->arg, op_info->a->sz, | |
596 | (u64) op_info->p, 0, 0, op_info->v0); | |
597 | op_info->ret = r; | |
598 | } | |
599 | ||
600 | static int sn_hwperf_op_cpu(struct sn_hwperf_op_info *op_info) | |
601 | { | |
602 | u32 cpu; | |
603 | u32 use_ipi; | |
604 | int r = 0; | |
605 | cpumask_t save_allowed; | |
606 | ||
607 | cpu = (op_info->a->arg & SN_HWPERF_ARG_CPU_MASK) >> 32; | |
608 | use_ipi = op_info->a->arg & SN_HWPERF_ARG_USE_IPI_MASK; | |
609 | op_info->a->arg &= SN_HWPERF_ARG_OBJID_MASK; | |
610 | ||
611 | if (cpu != SN_HWPERF_ARG_ANY_CPU) { | |
5dd3c994 | 612 | if (cpu >= nr_cpu_ids || !cpu_online(cpu)) { |
1da177e4 LT |
613 | r = -EINVAL; |
614 | goto out; | |
615 | } | |
616 | } | |
617 | ||
618 | if (cpu == SN_HWPERF_ARG_ANY_CPU || cpu == get_cpu()) { | |
619 | /* don't care, or already on correct cpu */ | |
620 | sn_hwperf_call_sal(op_info); | |
621 | } | |
622 | else { | |
623 | if (use_ipi) { | |
624 | /* use an interprocessor interrupt to call SAL */ | |
625 | smp_call_function_single(cpu, sn_hwperf_call_sal, | |
8691e5a8 | 626 | op_info, 1); |
1da177e4 LT |
627 | } |
628 | else { | |
629 | /* migrate the task before calling SAL */ | |
630 | save_allowed = current->cpus_allowed; | |
93f7c93b | 631 | set_cpus_allowed_ptr(current, cpumask_of(cpu)); |
1da177e4 | 632 | sn_hwperf_call_sal(op_info); |
93f7c93b | 633 | set_cpus_allowed_ptr(current, &save_allowed); |
1da177e4 LT |
634 | } |
635 | } | |
636 | r = op_info->ret; | |
637 | ||
638 | out: | |
639 | return r; | |
640 | } | |
641 | ||
642 | /* map SAL hwperf error code to system error code */ | |
643 | static int sn_hwperf_map_err(int hwperf_err) | |
644 | { | |
645 | int e; | |
646 | ||
647 | switch(hwperf_err) { | |
648 | case SN_HWPERF_OP_OK: | |
649 | e = 0; | |
650 | break; | |
651 | ||
652 | case SN_HWPERF_OP_NOMEM: | |
653 | e = -ENOMEM; | |
654 | break; | |
655 | ||
656 | case SN_HWPERF_OP_NO_PERM: | |
657 | e = -EPERM; | |
658 | break; | |
659 | ||
660 | case SN_HWPERF_OP_IO_ERROR: | |
661 | e = -EIO; | |
662 | break; | |
663 | ||
664 | case SN_HWPERF_OP_BUSY: | |
4a5c13c7 MG |
665 | e = -EBUSY; |
666 | break; | |
667 | ||
1da177e4 LT |
668 | case SN_HWPERF_OP_RECONFIGURE: |
669 | e = -EAGAIN; | |
670 | break; | |
671 | ||
672 | case SN_HWPERF_OP_INVAL: | |
673 | default: | |
674 | e = -EINVAL; | |
675 | break; | |
676 | } | |
677 | ||
678 | return e; | |
679 | } | |
680 | ||
681 | /* | |
682 | * ioctl for "sn_hwperf" misc device | |
683 | */ | |
1114b684 | 684 | static long sn_hwperf_ioctl(struct file *fp, u32 op, unsigned long arg) |
1da177e4 LT |
685 | { |
686 | struct sn_hwperf_ioctl_args a; | |
687 | struct cpuinfo_ia64 *cdata; | |
688 | struct sn_hwperf_object_info *objs; | |
689 | struct sn_hwperf_object_info *cpuobj; | |
690 | struct sn_hwperf_op_info op_info; | |
691 | void *p = NULL; | |
692 | int nobj; | |
693 | char slice; | |
694 | int node; | |
695 | int r; | |
696 | int v0; | |
697 | int i; | |
698 | int j; | |
699 | ||
1da177e4 LT |
700 | /* only user requests are allowed here */ |
701 | if ((op & SN_HWPERF_OP_MASK) < 10) { | |
702 | r = -EINVAL; | |
703 | goto error; | |
704 | } | |
705 | r = copy_from_user(&a, (const void __user *)arg, | |
706 | sizeof(struct sn_hwperf_ioctl_args)); | |
707 | if (r != 0) { | |
708 | r = -EFAULT; | |
709 | goto error; | |
710 | } | |
711 | ||
712 | /* | |
713 | * Allocate memory to hold a kernel copy of the user buffer. The | |
714 | * buffer contents are either copied in or out (or both) of user | |
715 | * space depending on the flags encoded in the requested operation. | |
716 | */ | |
717 | if (a.ptr) { | |
718 | p = vmalloc(a.sz); | |
719 | if (!p) { | |
720 | r = -ENOMEM; | |
721 | goto error; | |
722 | } | |
723 | } | |
724 | ||
725 | if (op & SN_HWPERF_OP_MEM_COPYIN) { | |
726 | r = copy_from_user(p, (const void __user *)a.ptr, a.sz); | |
727 | if (r != 0) { | |
728 | r = -EFAULT; | |
729 | goto error; | |
730 | } | |
731 | } | |
732 | ||
733 | switch (op) { | |
734 | case SN_HWPERF_GET_CPU_INFO: | |
735 | if (a.sz == sizeof(u64)) { | |
736 | /* special case to get size needed */ | |
737 | *(u64 *) p = (u64) num_online_cpus() * | |
738 | sizeof(struct sn_hwperf_object_info); | |
739 | } else | |
740 | if (a.sz < num_online_cpus() * sizeof(struct sn_hwperf_object_info)) { | |
741 | r = -ENOMEM; | |
742 | goto error; | |
743 | } else | |
744 | if ((r = sn_hwperf_enum_objects(&nobj, &objs)) == 0) { | |
83e12a07 MG |
745 | int cpuobj_index = 0; |
746 | ||
1da177e4 LT |
747 | memset(p, 0, a.sz); |
748 | for (i = 0; i < nobj; i++) { | |
60a3ba0b MG |
749 | if (!SN_HWPERF_IS_NODE(objs + i)) |
750 | continue; | |
1da177e4 LT |
751 | node = sn_hwperf_obj_to_cnode(objs + i); |
752 | for_each_online_cpu(j) { | |
753 | if (node != cpu_to_node(j)) | |
754 | continue; | |
090de0b7 | 755 | cpuobj = (struct sn_hwperf_object_info *) p + cpuobj_index++; |
1da177e4 LT |
756 | slice = 'a' + cpuid_to_slice(j); |
757 | cdata = cpu_data(j); | |
758 | cpuobj->id = j; | |
759 | snprintf(cpuobj->name, | |
760 | sizeof(cpuobj->name), | |
761 | "CPU %luMHz %s", | |
762 | cdata->proc_freq / 1000000, | |
763 | cdata->vendor); | |
764 | snprintf(cpuobj->location, | |
765 | sizeof(cpuobj->location), | |
766 | "%s%c", objs[i].location, | |
767 | slice); | |
768 | } | |
769 | } | |
770 | ||
771 | vfree(objs); | |
772 | } | |
773 | break; | |
774 | ||
775 | case SN_HWPERF_GET_NODE_NASID: | |
776 | if (a.sz != sizeof(u64) || | |
a1d70577 | 777 | (node = a.arg) < 0 || !cnode_possible(node)) { |
1da177e4 LT |
778 | r = -EINVAL; |
779 | goto error; | |
780 | } | |
781 | *(u64 *)p = (u64)cnodeid_to_nasid(node); | |
782 | break; | |
783 | ||
784 | case SN_HWPERF_GET_OBJ_NODE: | |
dec1798f RK |
785 | i = a.arg; |
786 | if (a.sz != sizeof(u64) || i < 0) { | |
1da177e4 LT |
787 | r = -EINVAL; |
788 | goto error; | |
789 | } | |
790 | if ((r = sn_hwperf_enum_objects(&nobj, &objs)) == 0) { | |
dec1798f | 791 | if (i >= nobj) { |
1da177e4 LT |
792 | r = -EINVAL; |
793 | vfree(objs); | |
794 | goto error; | |
795 | } | |
dec1798f | 796 | if (objs[i].id != a.arg) { |
1da177e4 LT |
797 | for (i = 0; i < nobj; i++) { |
798 | if (objs[i].id == a.arg) | |
799 | break; | |
800 | } | |
801 | } | |
802 | if (i == nobj) { | |
803 | r = -EINVAL; | |
804 | vfree(objs); | |
805 | goto error; | |
806 | } | |
60a3ba0b MG |
807 | |
808 | if (!SN_HWPERF_IS_NODE(objs + i) && | |
809 | !SN_HWPERF_IS_IONODE(objs + i)) { | |
810 | r = -ENOENT; | |
811 | vfree(objs); | |
812 | goto error; | |
813 | } | |
814 | ||
1da177e4 LT |
815 | *(u64 *)p = (u64)sn_hwperf_obj_to_cnode(objs + i); |
816 | vfree(objs); | |
817 | } | |
818 | break; | |
819 | ||
820 | case SN_HWPERF_GET_MMRS: | |
821 | case SN_HWPERF_SET_MMRS: | |
822 | case SN_HWPERF_OBJECT_DISTANCE: | |
823 | op_info.p = p; | |
824 | op_info.a = &a; | |
825 | op_info.v0 = &v0; | |
826 | op_info.op = op; | |
827 | r = sn_hwperf_op_cpu(&op_info); | |
828 | if (r) { | |
829 | r = sn_hwperf_map_err(r); | |
4a5c13c7 | 830 | a.v0 = v0; |
1da177e4 LT |
831 | goto error; |
832 | } | |
833 | break; | |
834 | ||
835 | default: | |
836 | /* all other ops are a direct SAL call */ | |
837 | r = ia64_sn_hwperf_op(sn_hwperf_master_nasid, op, | |
838 | a.arg, a.sz, (u64) p, 0, 0, &v0); | |
839 | if (r) { | |
840 | r = sn_hwperf_map_err(r); | |
841 | goto error; | |
842 | } | |
843 | a.v0 = v0; | |
844 | break; | |
845 | } | |
846 | ||
847 | if (op & SN_HWPERF_OP_MEM_COPYOUT) { | |
848 | r = copy_to_user((void __user *)a.ptr, p, a.sz); | |
849 | if (r != 0) { | |
850 | r = -EFAULT; | |
851 | goto error; | |
852 | } | |
853 | } | |
854 | ||
855 | error: | |
856 | vfree(p); | |
857 | ||
1da177e4 LT |
858 | return r; |
859 | } | |
860 | ||
5dfe4c96 | 861 | static const struct file_operations sn_hwperf_fops = { |
1114b684 | 862 | .unlocked_ioctl = sn_hwperf_ioctl, |
6038f373 | 863 | .llseek = noop_llseek, |
1da177e4 LT |
864 | }; |
865 | ||
866 | static struct miscdevice sn_hwperf_dev = { | |
867 | MISC_DYNAMIC_MINOR, | |
868 | "sn_hwperf", | |
869 | &sn_hwperf_fops | |
870 | }; | |
871 | ||
872 | static int sn_hwperf_init(void) | |
873 | { | |
874 | u64 v; | |
875 | int salr; | |
876 | int e = 0; | |
877 | ||
878 | /* single threaded, once-only initialization */ | |
0245583a | 879 | mutex_lock(&sn_hwperf_init_mutex); |
60a3ba0b | 880 | |
1da177e4 | 881 | if (sn_hwperf_salheap) { |
0245583a | 882 | mutex_unlock(&sn_hwperf_init_mutex); |
1da177e4 LT |
883 | return e; |
884 | } | |
885 | ||
886 | /* | |
887 | * The PROM code needs a fixed reference node. For convenience the | |
888 | * same node as the console I/O is used. | |
889 | */ | |
890 | sn_hwperf_master_nasid = (nasid_t) ia64_sn_get_console_nasid(); | |
891 | ||
892 | /* | |
893 | * Request the needed size and install the PROM scratch area. | |
894 | * The PROM keeps various tracking bits in this memory area. | |
895 | */ | |
896 | salr = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
897 | (u64) SN_HWPERF_GET_HEAPSIZE, 0, | |
898 | (u64) sizeof(u64), (u64) &v, 0, 0, NULL); | |
899 | if (salr != SN_HWPERF_OP_OK) { | |
900 | e = -EINVAL; | |
901 | goto out; | |
902 | } | |
903 | ||
904 | if ((sn_hwperf_salheap = vmalloc(v)) == NULL) { | |
905 | e = -ENOMEM; | |
906 | goto out; | |
907 | } | |
908 | salr = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
909 | SN_HWPERF_INSTALL_HEAP, 0, v, | |
910 | (u64) sn_hwperf_salheap, 0, 0, NULL); | |
911 | if (salr != SN_HWPERF_OP_OK) { | |
912 | e = -EINVAL; | |
913 | goto out; | |
914 | } | |
915 | ||
916 | salr = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
917 | SN_HWPERF_OBJECT_COUNT, 0, | |
918 | sizeof(u64), (u64) &v, 0, 0, NULL); | |
919 | if (salr != SN_HWPERF_OP_OK) { | |
920 | e = -EINVAL; | |
921 | goto out; | |
922 | } | |
923 | sn_hwperf_obj_cnt = (int)v; | |
924 | ||
925 | out: | |
926 | if (e < 0 && sn_hwperf_salheap) { | |
927 | vfree(sn_hwperf_salheap); | |
928 | sn_hwperf_salheap = NULL; | |
929 | sn_hwperf_obj_cnt = 0; | |
930 | } | |
0245583a | 931 | mutex_unlock(&sn_hwperf_init_mutex); |
1da177e4 LT |
932 | return e; |
933 | } | |
934 | ||
935 | int sn_topology_open(struct inode *inode, struct file *file) | |
936 | { | |
937 | int e; | |
938 | struct seq_file *seq; | |
939 | struct sn_hwperf_object_info *objbuf; | |
940 | int nobj; | |
941 | ||
942 | if ((e = sn_hwperf_enum_objects(&nobj, &objbuf)) == 0) { | |
943 | e = seq_open(file, &sn_topology_seq_ops); | |
944 | seq = file->private_data; | |
945 | seq->private = objbuf; | |
946 | } | |
947 | ||
948 | return e; | |
949 | } | |
950 | ||
951 | int sn_topology_release(struct inode *inode, struct file *file) | |
952 | { | |
953 | struct seq_file *seq = file->private_data; | |
954 | ||
955 | vfree(seq->private); | |
956 | return seq_release(inode, file); | |
957 | } | |
60a3ba0b MG |
958 | |
959 | int sn_hwperf_get_nearest_node(cnodeid_t node, | |
960 | cnodeid_t *near_mem_node, cnodeid_t *near_cpu_node) | |
961 | { | |
962 | int e; | |
963 | int nobj; | |
964 | struct sn_hwperf_object_info *objbuf; | |
965 | ||
966 | if ((e = sn_hwperf_enum_objects(&nobj, &objbuf)) == 0) { | |
967 | e = sn_hwperf_get_nearest_node_objdata(objbuf, nobj, | |
968 | node, near_mem_node, near_cpu_node); | |
969 | vfree(objbuf); | |
970 | } | |
971 | ||
972 | return e; | |
973 | } | |
974 | ||
975 | static int __devinit sn_hwperf_misc_register_init(void) | |
976 | { | |
977 | int e; | |
978 | ||
f478af9d JS |
979 | if (!ia64_platform_is("sn2")) |
980 | return 0; | |
981 | ||
60a3ba0b MG |
982 | sn_hwperf_init(); |
983 | ||
984 | /* | |
985 | * Register a dynamic misc device for hwperf ioctls. Platforms | |
986 | * supporting hotplug will create /dev/sn_hwperf, else user | |
987 | * can to look up the minor number in /proc/misc. | |
988 | */ | |
989 | if ((e = misc_register(&sn_hwperf_dev)) != 0) { | |
990 | printk(KERN_ERR "sn_hwperf_misc_register_init: failed to " | |
991 | "register misc device for \"%s\"\n", sn_hwperf_dev.name); | |
992 | } | |
993 | ||
994 | return e; | |
995 | } | |
996 | ||
997 | device_initcall(sn_hwperf_misc_register_init); /* after misc_init() */ | |
998 | EXPORT_SYMBOL(sn_hwperf_get_nearest_node); |