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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 | * | |
6 | * Copyright (C) 2004-2005 Silicon Graphics, Inc. All rights reserved. | |
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> | |
35 | #include <asm/processor.h> | |
36 | #include <asm/topology.h> | |
37 | #include <asm/smp.h> | |
38 | #include <asm/semaphore.h> | |
39 | #include <asm/segment.h> | |
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 | ||
55 | static int sn_hwperf_enum_objects(int *nobj, struct sn_hwperf_object_info **ret) | |
56 | { | |
57 | int e; | |
58 | u64 sz; | |
59 | struct sn_hwperf_object_info *objbuf = NULL; | |
60 | ||
61 | if ((e = sn_hwperf_init()) < 0) { | |
62 | printk("sn_hwperf_init failed: err %d\n", e); | |
63 | goto out; | |
64 | } | |
65 | ||
66 | sz = sn_hwperf_obj_cnt * sizeof(struct sn_hwperf_object_info); | |
67 | if ((objbuf = (struct sn_hwperf_object_info *) vmalloc(sz)) == NULL) { | |
68 | printk("sn_hwperf_enum_objects: vmalloc(%d) failed\n", (int)sz); | |
69 | e = -ENOMEM; | |
70 | goto out; | |
71 | } | |
72 | ||
73 | e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, SN_HWPERF_ENUM_OBJECTS, | |
74 | 0, sz, (u64) objbuf, 0, 0, NULL); | |
75 | if (e != SN_HWPERF_OP_OK) { | |
76 | e = -EINVAL; | |
77 | vfree(objbuf); | |
78 | } | |
79 | ||
80 | out: | |
81 | *nobj = sn_hwperf_obj_cnt; | |
82 | *ret = objbuf; | |
83 | return e; | |
84 | } | |
85 | ||
4a5c13c7 MG |
86 | static int sn_hwperf_location_to_bpos(char *location, |
87 | int *rack, int *bay, int *slot, int *slab) | |
88 | { | |
89 | char type; | |
90 | ||
91 | /* first scan for an old style geoid string */ | |
92 | if (sscanf(location, "%03d%c%02d#%d", | |
93 | rack, &type, bay, slab) == 4) | |
94 | *slot = 0; | |
95 | else /* scan for a new bladed geoid string */ | |
96 | if (sscanf(location, "%03d%c%02d^%02d#%d", | |
97 | rack, &type, bay, slot, slab) != 5) | |
98 | return -1; | |
99 | /* success */ | |
100 | return 0; | |
101 | } | |
102 | ||
1da177e4 LT |
103 | static int sn_hwperf_geoid_to_cnode(char *location) |
104 | { | |
105 | int cnode; | |
106 | geoid_t geoid; | |
107 | moduleid_t module_id; | |
4a5c13c7 MG |
108 | int rack, bay, slot, slab; |
109 | int this_rack, this_bay, this_slot, this_slab; | |
1da177e4 | 110 | |
4a5c13c7 | 111 | if (sn_hwperf_location_to_bpos(location, &rack, &bay, &slot, &slab)) |
1da177e4 LT |
112 | return -1; |
113 | ||
114 | for (cnode = 0; cnode < numionodes; cnode++) { | |
115 | geoid = cnodeid_get_geoid(cnode); | |
116 | module_id = geo_module(geoid); | |
117 | this_rack = MODULE_GET_RACK(module_id); | |
4a5c13c7 MG |
118 | this_bay = MODULE_GET_BPOS(module_id); |
119 | this_slot = 0; /* XXX */ | |
1da177e4 | 120 | this_slab = geo_slab(geoid); |
4a5c13c7 MG |
121 | if (rack == this_rack && bay == this_bay && |
122 | slot == this_slot && slab == this_slab) { | |
1da177e4 | 123 | break; |
4a5c13c7 | 124 | } |
1da177e4 LT |
125 | } |
126 | ||
127 | return cnode < numionodes ? cnode : -1; | |
128 | } | |
129 | ||
130 | static int sn_hwperf_obj_to_cnode(struct sn_hwperf_object_info * obj) | |
131 | { | |
132 | if (!obj->sn_hwp_this_part) | |
133 | return -1; | |
134 | return sn_hwperf_geoid_to_cnode(obj->location); | |
135 | } | |
136 | ||
137 | static int sn_hwperf_generic_ordinal(struct sn_hwperf_object_info *obj, | |
138 | struct sn_hwperf_object_info *objs) | |
139 | { | |
140 | int ordinal; | |
141 | struct sn_hwperf_object_info *p; | |
142 | ||
143 | for (ordinal=0, p=objs; p != obj; p++) { | |
144 | if (SN_HWPERF_FOREIGN(p)) | |
145 | continue; | |
146 | if (SN_HWPERF_SAME_OBJTYPE(p, obj)) | |
147 | ordinal++; | |
148 | } | |
149 | ||
150 | return ordinal; | |
151 | } | |
152 | ||
153 | static const char *slabname_node = "node"; /* SHub asic */ | |
154 | static const char *slabname_ionode = "ionode"; /* TIO asic */ | |
155 | static const char *slabname_router = "router"; /* NL3R or NL4R */ | |
156 | static const char *slabname_other = "other"; /* unknown asic */ | |
157 | ||
158 | static const char *sn_hwperf_get_slabname(struct sn_hwperf_object_info *obj, | |
159 | struct sn_hwperf_object_info *objs, int *ordinal) | |
160 | { | |
161 | int isnode; | |
162 | const char *slabname = slabname_other; | |
163 | ||
164 | if ((isnode = SN_HWPERF_IS_NODE(obj)) || SN_HWPERF_IS_IONODE(obj)) { | |
165 | slabname = isnode ? slabname_node : slabname_ionode; | |
166 | *ordinal = sn_hwperf_obj_to_cnode(obj); | |
167 | } | |
168 | else { | |
169 | *ordinal = sn_hwperf_generic_ordinal(obj, objs); | |
170 | if (SN_HWPERF_IS_ROUTER(obj)) | |
171 | slabname = slabname_router; | |
172 | } | |
173 | ||
174 | return slabname; | |
175 | } | |
176 | ||
4a5c13c7 MG |
177 | static void print_pci_topology(struct seq_file *s, |
178 | struct sn_hwperf_object_info *obj, int *ordinal, | |
179 | char *pci_topo_buf, int len) | |
180 | { | |
181 | char *p1; | |
182 | char *p2; | |
183 | ||
184 | for (p1=pci_topo_buf; *p1 && p1 < pci_topo_buf + len;) { | |
185 | if (!(p2 = strchr(p1, '\n'))) | |
186 | break; | |
187 | *p2 = '\0'; | |
188 | seq_printf(s, "pcibus %d %s-%s\n", | |
189 | *ordinal, obj->location, p1); | |
190 | (*ordinal)++; | |
191 | p1 = p2 + 1; | |
192 | } | |
193 | } | |
194 | ||
1da177e4 LT |
195 | static int sn_topology_show(struct seq_file *s, void *d) |
196 | { | |
197 | int sz; | |
198 | int pt; | |
4a5c13c7 | 199 | int e = 0; |
1da177e4 LT |
200 | int i; |
201 | int j; | |
202 | const char *slabname; | |
203 | int ordinal; | |
204 | cpumask_t cpumask; | |
205 | char slice; | |
206 | struct cpuinfo_ia64 *c; | |
207 | struct sn_hwperf_port_info *ptdata; | |
208 | struct sn_hwperf_object_info *p; | |
209 | struct sn_hwperf_object_info *obj = d; /* this object */ | |
210 | struct sn_hwperf_object_info *objs = s->private; /* all objects */ | |
4a5c13c7 MG |
211 | int rack, bay, slot, slab; |
212 | u8 shubtype; | |
213 | u8 system_size; | |
214 | u8 sharing_size; | |
215 | u8 partid; | |
216 | u8 coher; | |
217 | u8 nasid_shift; | |
218 | u8 region_size; | |
219 | u16 nasid_mask; | |
220 | int nasid_msb; | |
221 | char *pci_topo_buf; | |
222 | int pci_bus_ordinal = 0; | |
223 | static int pci_topo_buf_len = 256; | |
1da177e4 LT |
224 | |
225 | if (obj == objs) { | |
4a5c13c7 | 226 | seq_printf(s, "# sn_topology version 2\n"); |
1da177e4 LT |
227 | seq_printf(s, "# objtype ordinal location partition" |
228 | " [attribute value [, ...]]\n"); | |
4a5c13c7 MG |
229 | |
230 | if (ia64_sn_get_sn_info(0, | |
231 | &shubtype, &nasid_mask, &nasid_shift, &system_size, | |
232 | &sharing_size, &partid, &coher, ®ion_size)) | |
233 | BUG(); | |
234 | for (nasid_msb=63; nasid_msb > 0; nasid_msb--) { | |
235 | if (((u64)nasid_mask << nasid_shift) & (1ULL << nasid_msb)) | |
236 | break; | |
237 | } | |
238 | seq_printf(s, "partition %u %s local " | |
239 | "shubtype %s, " | |
240 | "nasid_mask 0x%016lx, " | |
241 | "nasid_bits %d:%d, " | |
242 | "system_size %d, " | |
243 | "sharing_size %d, " | |
244 | "coherency_domain %d, " | |
245 | "region_size %d\n", | |
246 | ||
247 | partid, system_utsname.nodename, | |
248 | shubtype ? "shub2" : "shub1", | |
249 | (u64)nasid_mask << nasid_shift, nasid_msb, nasid_shift, | |
250 | system_size, sharing_size, coher, region_size); | |
1da177e4 LT |
251 | } |
252 | ||
253 | if (SN_HWPERF_FOREIGN(obj)) { | |
254 | /* private in another partition: not interesting */ | |
255 | return 0; | |
256 | } | |
257 | ||
4a5c13c7 | 258 | for (i = 0; i < SN_HWPERF_MAXSTRING && obj->name[i]; i++) { |
1da177e4 LT |
259 | if (obj->name[i] == ' ') |
260 | obj->name[i] = '_'; | |
261 | } | |
262 | ||
263 | slabname = sn_hwperf_get_slabname(obj, objs, &ordinal); | |
264 | seq_printf(s, "%s %d %s %s asic %s", slabname, ordinal, obj->location, | |
265 | obj->sn_hwp_this_part ? "local" : "shared", obj->name); | |
266 | ||
267 | if (!SN_HWPERF_IS_NODE(obj) && !SN_HWPERF_IS_IONODE(obj)) | |
268 | seq_putc(s, '\n'); | |
269 | else { | |
270 | seq_printf(s, ", nasid 0x%x", cnodeid_to_nasid(ordinal)); | |
271 | for (i=0; i < numionodes; i++) { | |
272 | seq_printf(s, i ? ":%d" : ", dist %d", | |
273 | node_distance(ordinal, i)); | |
274 | } | |
275 | seq_putc(s, '\n'); | |
276 | ||
277 | /* | |
278 | * CPUs on this node, if any | |
279 | */ | |
280 | cpumask = node_to_cpumask(ordinal); | |
281 | for_each_online_cpu(i) { | |
282 | if (cpu_isset(i, cpumask)) { | |
283 | slice = 'a' + cpuid_to_slice(i); | |
284 | c = cpu_data(i); | |
285 | seq_printf(s, "cpu %d %s%c local" | |
286 | " freq %luMHz, arch ia64", | |
287 | i, obj->location, slice, | |
288 | c->proc_freq / 1000000); | |
289 | for_each_online_cpu(j) { | |
290 | seq_printf(s, j ? ":%d" : ", dist %d", | |
291 | node_distance( | |
292 | cpuid_to_cnodeid(i), | |
293 | cpuid_to_cnodeid(j))); | |
294 | } | |
295 | seq_putc(s, '\n'); | |
296 | } | |
297 | } | |
4a5c13c7 MG |
298 | |
299 | /* | |
300 | * PCI busses attached to this node, if any | |
301 | */ | |
302 | do { | |
f1e2a1c8 MG |
303 | if (sn_hwperf_location_to_bpos(obj->location, |
304 | &rack, &bay, &slot, &slab)) { | |
4a5c13c7 MG |
305 | break; |
306 | } | |
307 | ||
f1e2a1c8 MG |
308 | if (!(pci_topo_buf = vmalloc(pci_topo_buf_len))) { |
309 | printk("sn_topology_show: vmalloc failed\n"); | |
310 | break; | |
311 | } | |
4a5c13c7 MG |
312 | |
313 | e = ia64_sn_ioif_get_pci_topology(rack, bay, slot, slab, | |
314 | pci_topo_buf, pci_topo_buf_len); | |
315 | ||
316 | switch (e) { | |
317 | case SALRET_NOT_IMPLEMENTED: | |
318 | case SALRET_INVALID_ARG: | |
319 | /* ignore, don't print anything */ | |
320 | e = SN_HWPERF_OP_OK; | |
321 | break; | |
322 | ||
323 | case SALRET_ERROR: | |
324 | /* retry with a bigger buffer */ | |
325 | pci_topo_buf_len += 256; | |
326 | break; | |
327 | ||
328 | case SN_HWPERF_OP_OK: | |
f1e2a1c8 | 329 | default: |
4a5c13c7 MG |
330 | /* export pci bus info */ |
331 | print_pci_topology(s, obj, &pci_bus_ordinal, | |
332 | pci_topo_buf, pci_topo_buf_len); | |
333 | break; | |
334 | } | |
335 | vfree(pci_topo_buf); | |
336 | } while (e != SN_HWPERF_OP_OK && pci_topo_buf_len < 0x200000); | |
1da177e4 LT |
337 | } |
338 | ||
339 | if (obj->ports) { | |
340 | /* | |
341 | * numalink ports | |
342 | */ | |
343 | sz = obj->ports * sizeof(struct sn_hwperf_port_info); | |
344 | if ((ptdata = vmalloc(sz)) == NULL) | |
345 | return -ENOMEM; | |
346 | e = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
347 | SN_HWPERF_ENUM_PORTS, obj->id, sz, | |
348 | (u64) ptdata, 0, 0, NULL); | |
349 | if (e != SN_HWPERF_OP_OK) | |
350 | return -EINVAL; | |
351 | for (ordinal=0, p=objs; p != obj; p++) { | |
352 | if (!SN_HWPERF_FOREIGN(p)) | |
353 | ordinal += p->ports; | |
354 | } | |
355 | for (pt = 0; pt < obj->ports; pt++) { | |
356 | for (p = objs, i = 0; i < sn_hwperf_obj_cnt; i++, p++) { | |
357 | if (ptdata[pt].conn_id == p->id) { | |
358 | break; | |
359 | } | |
360 | } | |
361 | seq_printf(s, "numalink %d %s-%d", | |
362 | ordinal+pt, obj->location, ptdata[pt].port); | |
363 | ||
364 | if (i >= sn_hwperf_obj_cnt) { | |
365 | /* no connection */ | |
366 | seq_puts(s, " local endpoint disconnected" | |
367 | ", protocol unknown\n"); | |
368 | continue; | |
369 | } | |
370 | ||
371 | if (obj->sn_hwp_this_part && p->sn_hwp_this_part) | |
372 | /* both ends local to this partition */ | |
373 | seq_puts(s, " local"); | |
374 | else if (!obj->sn_hwp_this_part && !p->sn_hwp_this_part) | |
375 | /* both ends of the link in foreign partiton */ | |
376 | seq_puts(s, " foreign"); | |
377 | else | |
378 | /* link straddles a partition */ | |
379 | seq_puts(s, " shared"); | |
380 | ||
381 | /* | |
382 | * Unlikely, but strictly should query the LLP config | |
383 | * registers because an NL4R can be configured to run | |
384 | * NL3 protocol, even when not talking to an NL3 router. | |
385 | * Ditto for node-node. | |
386 | */ | |
387 | seq_printf(s, " endpoint %s-%d, protocol %s\n", | |
388 | p->location, ptdata[pt].conn_port, | |
389 | (SN_HWPERF_IS_NL3ROUTER(obj) || | |
390 | SN_HWPERF_IS_NL3ROUTER(p)) ? "LLP3" : "LLP4"); | |
391 | } | |
392 | vfree(ptdata); | |
393 | } | |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
398 | static void *sn_topology_start(struct seq_file *s, loff_t * pos) | |
399 | { | |
400 | struct sn_hwperf_object_info *objs = s->private; | |
401 | ||
402 | if (*pos < sn_hwperf_obj_cnt) | |
403 | return (void *)(objs + *pos); | |
404 | ||
405 | return NULL; | |
406 | } | |
407 | ||
408 | static void *sn_topology_next(struct seq_file *s, void *v, loff_t * pos) | |
409 | { | |
410 | ++*pos; | |
411 | return sn_topology_start(s, pos); | |
412 | } | |
413 | ||
414 | static void sn_topology_stop(struct seq_file *m, void *v) | |
415 | { | |
416 | return; | |
417 | } | |
418 | ||
419 | /* | |
420 | * /proc/sgi_sn/sn_topology, read-only using seq_file | |
421 | */ | |
422 | static struct seq_operations sn_topology_seq_ops = { | |
423 | .start = sn_topology_start, | |
424 | .next = sn_topology_next, | |
425 | .stop = sn_topology_stop, | |
426 | .show = sn_topology_show | |
427 | }; | |
428 | ||
429 | struct sn_hwperf_op_info { | |
430 | u64 op; | |
431 | struct sn_hwperf_ioctl_args *a; | |
432 | void *p; | |
433 | int *v0; | |
434 | int ret; | |
435 | }; | |
436 | ||
437 | static void sn_hwperf_call_sal(void *info) | |
438 | { | |
439 | struct sn_hwperf_op_info *op_info = info; | |
440 | int r; | |
441 | ||
442 | r = ia64_sn_hwperf_op(sn_hwperf_master_nasid, op_info->op, | |
443 | op_info->a->arg, op_info->a->sz, | |
444 | (u64) op_info->p, 0, 0, op_info->v0); | |
445 | op_info->ret = r; | |
446 | } | |
447 | ||
448 | static int sn_hwperf_op_cpu(struct sn_hwperf_op_info *op_info) | |
449 | { | |
450 | u32 cpu; | |
451 | u32 use_ipi; | |
452 | int r = 0; | |
453 | cpumask_t save_allowed; | |
454 | ||
455 | cpu = (op_info->a->arg & SN_HWPERF_ARG_CPU_MASK) >> 32; | |
456 | use_ipi = op_info->a->arg & SN_HWPERF_ARG_USE_IPI_MASK; | |
457 | op_info->a->arg &= SN_HWPERF_ARG_OBJID_MASK; | |
458 | ||
459 | if (cpu != SN_HWPERF_ARG_ANY_CPU) { | |
460 | if (cpu >= num_online_cpus() || !cpu_online(cpu)) { | |
461 | r = -EINVAL; | |
462 | goto out; | |
463 | } | |
464 | } | |
465 | ||
466 | if (cpu == SN_HWPERF_ARG_ANY_CPU || cpu == get_cpu()) { | |
467 | /* don't care, or already on correct cpu */ | |
468 | sn_hwperf_call_sal(op_info); | |
469 | } | |
470 | else { | |
471 | if (use_ipi) { | |
472 | /* use an interprocessor interrupt to call SAL */ | |
473 | smp_call_function_single(cpu, sn_hwperf_call_sal, | |
474 | op_info, 1, 1); | |
475 | } | |
476 | else { | |
477 | /* migrate the task before calling SAL */ | |
478 | save_allowed = current->cpus_allowed; | |
479 | set_cpus_allowed(current, cpumask_of_cpu(cpu)); | |
480 | sn_hwperf_call_sal(op_info); | |
481 | set_cpus_allowed(current, save_allowed); | |
482 | } | |
483 | } | |
484 | r = op_info->ret; | |
485 | ||
486 | out: | |
487 | return r; | |
488 | } | |
489 | ||
490 | /* map SAL hwperf error code to system error code */ | |
491 | static int sn_hwperf_map_err(int hwperf_err) | |
492 | { | |
493 | int e; | |
494 | ||
495 | switch(hwperf_err) { | |
496 | case SN_HWPERF_OP_OK: | |
497 | e = 0; | |
498 | break; | |
499 | ||
500 | case SN_HWPERF_OP_NOMEM: | |
501 | e = -ENOMEM; | |
502 | break; | |
503 | ||
504 | case SN_HWPERF_OP_NO_PERM: | |
505 | e = -EPERM; | |
506 | break; | |
507 | ||
508 | case SN_HWPERF_OP_IO_ERROR: | |
509 | e = -EIO; | |
510 | break; | |
511 | ||
512 | case SN_HWPERF_OP_BUSY: | |
4a5c13c7 MG |
513 | e = -EBUSY; |
514 | break; | |
515 | ||
1da177e4 LT |
516 | case SN_HWPERF_OP_RECONFIGURE: |
517 | e = -EAGAIN; | |
518 | break; | |
519 | ||
520 | case SN_HWPERF_OP_INVAL: | |
521 | default: | |
522 | e = -EINVAL; | |
523 | break; | |
524 | } | |
525 | ||
526 | return e; | |
527 | } | |
528 | ||
529 | /* | |
530 | * ioctl for "sn_hwperf" misc device | |
531 | */ | |
532 | static int | |
533 | sn_hwperf_ioctl(struct inode *in, struct file *fp, u32 op, u64 arg) | |
534 | { | |
535 | struct sn_hwperf_ioctl_args a; | |
536 | struct cpuinfo_ia64 *cdata; | |
537 | struct sn_hwperf_object_info *objs; | |
538 | struct sn_hwperf_object_info *cpuobj; | |
539 | struct sn_hwperf_op_info op_info; | |
540 | void *p = NULL; | |
541 | int nobj; | |
542 | char slice; | |
543 | int node; | |
544 | int r; | |
545 | int v0; | |
546 | int i; | |
547 | int j; | |
548 | ||
549 | unlock_kernel(); | |
550 | ||
551 | /* only user requests are allowed here */ | |
552 | if ((op & SN_HWPERF_OP_MASK) < 10) { | |
553 | r = -EINVAL; | |
554 | goto error; | |
555 | } | |
556 | r = copy_from_user(&a, (const void __user *)arg, | |
557 | sizeof(struct sn_hwperf_ioctl_args)); | |
558 | if (r != 0) { | |
559 | r = -EFAULT; | |
560 | goto error; | |
561 | } | |
562 | ||
563 | /* | |
564 | * Allocate memory to hold a kernel copy of the user buffer. The | |
565 | * buffer contents are either copied in or out (or both) of user | |
566 | * space depending on the flags encoded in the requested operation. | |
567 | */ | |
568 | if (a.ptr) { | |
569 | p = vmalloc(a.sz); | |
570 | if (!p) { | |
571 | r = -ENOMEM; | |
572 | goto error; | |
573 | } | |
574 | } | |
575 | ||
576 | if (op & SN_HWPERF_OP_MEM_COPYIN) { | |
577 | r = copy_from_user(p, (const void __user *)a.ptr, a.sz); | |
578 | if (r != 0) { | |
579 | r = -EFAULT; | |
580 | goto error; | |
581 | } | |
582 | } | |
583 | ||
584 | switch (op) { | |
585 | case SN_HWPERF_GET_CPU_INFO: | |
586 | if (a.sz == sizeof(u64)) { | |
587 | /* special case to get size needed */ | |
588 | *(u64 *) p = (u64) num_online_cpus() * | |
589 | sizeof(struct sn_hwperf_object_info); | |
590 | } else | |
591 | if (a.sz < num_online_cpus() * sizeof(struct sn_hwperf_object_info)) { | |
592 | r = -ENOMEM; | |
593 | goto error; | |
594 | } else | |
595 | if ((r = sn_hwperf_enum_objects(&nobj, &objs)) == 0) { | |
596 | memset(p, 0, a.sz); | |
597 | for (i = 0; i < nobj; i++) { | |
598 | node = sn_hwperf_obj_to_cnode(objs + i); | |
599 | for_each_online_cpu(j) { | |
600 | if (node != cpu_to_node(j)) | |
601 | continue; | |
602 | cpuobj = (struct sn_hwperf_object_info *) p + j; | |
603 | slice = 'a' + cpuid_to_slice(j); | |
604 | cdata = cpu_data(j); | |
605 | cpuobj->id = j; | |
606 | snprintf(cpuobj->name, | |
607 | sizeof(cpuobj->name), | |
608 | "CPU %luMHz %s", | |
609 | cdata->proc_freq / 1000000, | |
610 | cdata->vendor); | |
611 | snprintf(cpuobj->location, | |
612 | sizeof(cpuobj->location), | |
613 | "%s%c", objs[i].location, | |
614 | slice); | |
615 | } | |
616 | } | |
617 | ||
618 | vfree(objs); | |
619 | } | |
620 | break; | |
621 | ||
622 | case SN_HWPERF_GET_NODE_NASID: | |
623 | if (a.sz != sizeof(u64) || | |
624 | (node = a.arg) < 0 || node >= numionodes) { | |
625 | r = -EINVAL; | |
626 | goto error; | |
627 | } | |
628 | *(u64 *)p = (u64)cnodeid_to_nasid(node); | |
629 | break; | |
630 | ||
631 | case SN_HWPERF_GET_OBJ_NODE: | |
632 | if (a.sz != sizeof(u64) || a.arg < 0) { | |
633 | r = -EINVAL; | |
634 | goto error; | |
635 | } | |
636 | if ((r = sn_hwperf_enum_objects(&nobj, &objs)) == 0) { | |
637 | if (a.arg >= nobj) { | |
638 | r = -EINVAL; | |
639 | vfree(objs); | |
640 | goto error; | |
641 | } | |
642 | if (objs[(i = a.arg)].id != a.arg) { | |
643 | for (i = 0; i < nobj; i++) { | |
644 | if (objs[i].id == a.arg) | |
645 | break; | |
646 | } | |
647 | } | |
648 | if (i == nobj) { | |
649 | r = -EINVAL; | |
650 | vfree(objs); | |
651 | goto error; | |
652 | } | |
653 | *(u64 *)p = (u64)sn_hwperf_obj_to_cnode(objs + i); | |
654 | vfree(objs); | |
655 | } | |
656 | break; | |
657 | ||
658 | case SN_HWPERF_GET_MMRS: | |
659 | case SN_HWPERF_SET_MMRS: | |
660 | case SN_HWPERF_OBJECT_DISTANCE: | |
661 | op_info.p = p; | |
662 | op_info.a = &a; | |
663 | op_info.v0 = &v0; | |
664 | op_info.op = op; | |
665 | r = sn_hwperf_op_cpu(&op_info); | |
666 | if (r) { | |
667 | r = sn_hwperf_map_err(r); | |
4a5c13c7 | 668 | a.v0 = v0; |
1da177e4 LT |
669 | goto error; |
670 | } | |
671 | break; | |
672 | ||
673 | default: | |
674 | /* all other ops are a direct SAL call */ | |
675 | r = ia64_sn_hwperf_op(sn_hwperf_master_nasid, op, | |
676 | a.arg, a.sz, (u64) p, 0, 0, &v0); | |
677 | if (r) { | |
678 | r = sn_hwperf_map_err(r); | |
679 | goto error; | |
680 | } | |
681 | a.v0 = v0; | |
682 | break; | |
683 | } | |
684 | ||
685 | if (op & SN_HWPERF_OP_MEM_COPYOUT) { | |
686 | r = copy_to_user((void __user *)a.ptr, p, a.sz); | |
687 | if (r != 0) { | |
688 | r = -EFAULT; | |
689 | goto error; | |
690 | } | |
691 | } | |
692 | ||
693 | error: | |
694 | vfree(p); | |
695 | ||
696 | lock_kernel(); | |
697 | return r; | |
698 | } | |
699 | ||
700 | static struct file_operations sn_hwperf_fops = { | |
701 | .ioctl = sn_hwperf_ioctl, | |
702 | }; | |
703 | ||
704 | static struct miscdevice sn_hwperf_dev = { | |
705 | MISC_DYNAMIC_MINOR, | |
706 | "sn_hwperf", | |
707 | &sn_hwperf_fops | |
708 | }; | |
709 | ||
710 | static int sn_hwperf_init(void) | |
711 | { | |
712 | u64 v; | |
713 | int salr; | |
714 | int e = 0; | |
715 | ||
716 | /* single threaded, once-only initialization */ | |
717 | down(&sn_hwperf_init_mutex); | |
718 | if (sn_hwperf_salheap) { | |
719 | up(&sn_hwperf_init_mutex); | |
720 | return e; | |
721 | } | |
722 | ||
723 | /* | |
724 | * The PROM code needs a fixed reference node. For convenience the | |
725 | * same node as the console I/O is used. | |
726 | */ | |
727 | sn_hwperf_master_nasid = (nasid_t) ia64_sn_get_console_nasid(); | |
728 | ||
729 | /* | |
730 | * Request the needed size and install the PROM scratch area. | |
731 | * The PROM keeps various tracking bits in this memory area. | |
732 | */ | |
733 | salr = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
734 | (u64) SN_HWPERF_GET_HEAPSIZE, 0, | |
735 | (u64) sizeof(u64), (u64) &v, 0, 0, NULL); | |
736 | if (salr != SN_HWPERF_OP_OK) { | |
737 | e = -EINVAL; | |
738 | goto out; | |
739 | } | |
740 | ||
741 | if ((sn_hwperf_salheap = vmalloc(v)) == NULL) { | |
742 | e = -ENOMEM; | |
743 | goto out; | |
744 | } | |
745 | salr = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
746 | SN_HWPERF_INSTALL_HEAP, 0, v, | |
747 | (u64) sn_hwperf_salheap, 0, 0, NULL); | |
748 | if (salr != SN_HWPERF_OP_OK) { | |
749 | e = -EINVAL; | |
750 | goto out; | |
751 | } | |
752 | ||
753 | salr = ia64_sn_hwperf_op(sn_hwperf_master_nasid, | |
754 | SN_HWPERF_OBJECT_COUNT, 0, | |
755 | sizeof(u64), (u64) &v, 0, 0, NULL); | |
756 | if (salr != SN_HWPERF_OP_OK) { | |
757 | e = -EINVAL; | |
758 | goto out; | |
759 | } | |
760 | sn_hwperf_obj_cnt = (int)v; | |
761 | ||
762 | out: | |
763 | if (e < 0 && sn_hwperf_salheap) { | |
764 | vfree(sn_hwperf_salheap); | |
765 | sn_hwperf_salheap = NULL; | |
766 | sn_hwperf_obj_cnt = 0; | |
767 | } | |
768 | ||
769 | if (!e) { | |
770 | /* | |
771 | * Register a dynamic misc device for ioctl. Platforms | |
772 | * supporting hotplug will create /dev/sn_hwperf, else | |
773 | * user can to look up the minor number in /proc/misc. | |
774 | */ | |
775 | if ((e = misc_register(&sn_hwperf_dev)) != 0) { | |
776 | printk(KERN_ERR "sn_hwperf_init: misc register " | |
777 | "for \"sn_hwperf\" failed, err %d\n", e); | |
778 | } | |
779 | } | |
780 | ||
781 | up(&sn_hwperf_init_mutex); | |
782 | return e; | |
783 | } | |
784 | ||
785 | int sn_topology_open(struct inode *inode, struct file *file) | |
786 | { | |
787 | int e; | |
788 | struct seq_file *seq; | |
789 | struct sn_hwperf_object_info *objbuf; | |
790 | int nobj; | |
791 | ||
792 | if ((e = sn_hwperf_enum_objects(&nobj, &objbuf)) == 0) { | |
793 | e = seq_open(file, &sn_topology_seq_ops); | |
794 | seq = file->private_data; | |
795 | seq->private = objbuf; | |
796 | } | |
797 | ||
798 | return e; | |
799 | } | |
800 | ||
801 | int sn_topology_release(struct inode *inode, struct file *file) | |
802 | { | |
803 | struct seq_file *seq = file->private_data; | |
804 | ||
805 | vfree(seq->private); | |
806 | return seq_release(inode, file); | |
807 | } |