Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * PowerPC64 LPAR Configuration Information Driver | |
3 | * | |
4 | * Dave Engebretsen engebret@us.ibm.com | |
5 | * Copyright (c) 2003 Dave Engebretsen | |
6 | * Will Schmidt willschm@us.ibm.com | |
7 | * SPLPAR updates, Copyright (c) 2003 Will Schmidt IBM Corporation. | |
8 | * seq_file updates, Copyright (c) 2004 Will Schmidt IBM Corporation. | |
9 | * Nathan Lynch nathanl@austin.ibm.com | |
10 | * Added lparcfg_write, Copyright (C) 2004 Nathan Lynch IBM Corporation. | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License | |
14 | * as published by the Free Software Foundation; either version | |
15 | * 2 of the License, or (at your option) any later version. | |
16 | * | |
17 | * This driver creates a proc file at /proc/ppc64/lparcfg which contains | |
18 | * keyword - value pairs that specify the configuration of the partition. | |
19 | */ | |
20 | ||
1da177e4 LT |
21 | #include <linux/module.h> |
22 | #include <linux/types.h> | |
23 | #include <linux/errno.h> | |
24 | #include <linux/proc_fs.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/seq_file.h> | |
27 | #include <asm/uaccess.h> | |
15b17189 | 28 | #include <asm/iseries/hv_lp_config.h> |
1da177e4 | 29 | #include <asm/lppaca.h> |
1da177e4 | 30 | #include <asm/hvcall.h> |
1ababe11 | 31 | #include <asm/firmware.h> |
1da177e4 LT |
32 | #include <asm/rtas.h> |
33 | #include <asm/system.h> | |
34 | #include <asm/time.h> | |
856509d5 | 35 | #include <asm/prom.h> |
271c3f35 | 36 | #include <asm/vdso_datapage.h> |
1da177e4 | 37 | |
34422fed | 38 | #define MODULE_VERS "1.7" |
1da177e4 LT |
39 | #define MODULE_NAME "lparcfg" |
40 | ||
41 | /* #define LPARCFG_DEBUG */ | |
42 | ||
1da177e4 LT |
43 | static struct proc_dir_entry *proc_ppc64_lparcfg; |
44 | #define LPARCFG_BUFF_SIZE 4096 | |
45 | ||
1da177e4 | 46 | /* |
16e9f994 SR |
47 | * Track sum of all purrs across all processors. This is used to further |
48 | * calculate usage values by different applications | |
1da177e4 LT |
49 | */ |
50 | static unsigned long get_purr(void) | |
51 | { | |
52 | unsigned long sum_purr = 0; | |
53 | int cpu; | |
1da177e4 | 54 | |
0e551954 | 55 | for_each_possible_cpu(cpu) { |
16e9f994 SR |
56 | if (firmware_has_feature(FW_FEATURE_ISERIES)) |
57 | sum_purr += lppaca[cpu].emulated_time_base; | |
58 | else { | |
59 | struct cpu_usage *cu; | |
1da177e4 | 60 | |
16e9f994 SR |
61 | cu = &per_cpu(cpu_usage_array, cpu); |
62 | sum_purr += cu->current_tb; | |
63 | } | |
1da177e4 LT |
64 | } |
65 | return sum_purr; | |
66 | } | |
67 | ||
16e9f994 | 68 | #ifdef CONFIG_PPC_ISERIES |
1da177e4 | 69 | |
d3d2176a | 70 | /* |
1da177e4 LT |
71 | * Methods used to fetch LPAR data when running on an iSeries platform. |
72 | */ | |
16e9f994 | 73 | static int iseries_lparcfg_data(struct seq_file *m, void *v) |
1da177e4 | 74 | { |
16e9f994 | 75 | unsigned long pool_id; |
1da177e4 LT |
76 | int shared, entitled_capacity, max_entitled_capacity; |
77 | int processors, max_processors; | |
1da177e4 LT |
78 | unsigned long purr = get_purr(); |
79 | ||
3356bb9f | 80 | shared = (int)(get_lppaca()->shared_proc); |
1da177e4 LT |
81 | |
82 | seq_printf(m, "system_active_processors=%d\n", | |
83 | (int)HvLpConfig_getSystemPhysicalProcessors()); | |
84 | ||
85 | seq_printf(m, "system_potential_processors=%d\n", | |
86 | (int)HvLpConfig_getSystemPhysicalProcessors()); | |
87 | ||
88 | processors = (int)HvLpConfig_getPhysicalProcessors(); | |
89 | seq_printf(m, "partition_active_processors=%d\n", processors); | |
90 | ||
91 | max_processors = (int)HvLpConfig_getMaxPhysicalProcessors(); | |
92 | seq_printf(m, "partition_potential_processors=%d\n", max_processors); | |
93 | ||
94 | if (shared) { | |
95 | entitled_capacity = HvLpConfig_getSharedProcUnits(); | |
96 | max_entitled_capacity = HvLpConfig_getMaxSharedProcUnits(); | |
97 | } else { | |
98 | entitled_capacity = processors * 100; | |
99 | max_entitled_capacity = max_processors * 100; | |
100 | } | |
101 | seq_printf(m, "partition_entitled_capacity=%d\n", entitled_capacity); | |
102 | ||
103 | seq_printf(m, "partition_max_entitled_capacity=%d\n", | |
104 | max_entitled_capacity); | |
105 | ||
106 | if (shared) { | |
107 | pool_id = HvLpConfig_getSharedPoolIndex(); | |
108 | seq_printf(m, "pool=%d\n", (int)pool_id); | |
109 | seq_printf(m, "pool_capacity=%d\n", | |
110 | (int)(HvLpConfig_getNumProcsInSharedPool(pool_id) * | |
111 | 100)); | |
112 | seq_printf(m, "purr=%ld\n", purr); | |
113 | } | |
114 | ||
115 | seq_printf(m, "shared_processor_mode=%d\n", shared); | |
116 | ||
117 | return 0; | |
118 | } | |
16e9f994 SR |
119 | |
120 | #else /* CONFIG_PPC_ISERIES */ | |
121 | ||
122 | static int iseries_lparcfg_data(struct seq_file *m, void *v) | |
123 | { | |
124 | return 0; | |
125 | } | |
126 | ||
1da177e4 LT |
127 | #endif /* CONFIG_PPC_ISERIES */ |
128 | ||
129 | #ifdef CONFIG_PPC_PSERIES | |
d3d2176a | 130 | /* |
1da177e4 LT |
131 | * Methods used to fetch LPAR data when running on a pSeries platform. |
132 | */ | |
d7867959 SR |
133 | /* find a better place for this function... */ |
134 | static void log_plpar_hcall_return(unsigned long rc, char *tag) | |
135 | { | |
136 | if (rc == 0) /* success, return */ | |
137 | return; | |
138 | /* check for null tag ? */ | |
706c8c93 | 139 | if (rc == H_HARDWARE) |
d7867959 SR |
140 | printk(KERN_INFO |
141 | "plpar-hcall (%s) failed with hardware fault\n", tag); | |
706c8c93 | 142 | else if (rc == H_FUNCTION) |
d7867959 SR |
143 | printk(KERN_INFO |
144 | "plpar-hcall (%s) failed; function not allowed\n", tag); | |
706c8c93 | 145 | else if (rc == H_AUTHORITY) |
d7867959 | 146 | printk(KERN_INFO |
706c8c93 SB |
147 | "plpar-hcall (%s) failed; not authorized to this" |
148 | " function\n", tag); | |
149 | else if (rc == H_PARAMETER) | |
d7867959 SR |
150 | printk(KERN_INFO "plpar-hcall (%s) failed; Bad parameter(s)\n", |
151 | tag); | |
152 | else | |
153 | printk(KERN_INFO | |
154 | "plpar-hcall (%s) failed with unexpected rc(0x%lx)\n", | |
155 | tag, rc); | |
156 | ||
157 | } | |
1da177e4 LT |
158 | |
159 | /* | |
160 | * H_GET_PPP hcall returns info in 4 parms. | |
161 | * entitled_capacity,unallocated_capacity, | |
162 | * aggregation, resource_capability). | |
163 | * | |
d3d2176a | 164 | * R4 = Entitled Processor Capacity Percentage. |
1da177e4 LT |
165 | * R5 = Unallocated Processor Capacity Percentage. |
166 | * R6 (AABBCCDDEEFFGGHH). | |
167 | * XXXX - reserved (0) | |
168 | * XXXX - reserved (0) | |
169 | * XXXX - Group Number | |
170 | * XXXX - Pool Number. | |
171 | * R7 (IIJJKKLLMMNNOOPP). | |
172 | * XX - reserved. (0) | |
173 | * XX - bit 0-6 reserved (0). bit 7 is Capped indicator. | |
174 | * XX - variable processor Capacity Weight | |
175 | * XX - Unallocated Variable Processor Capacity Weight. | |
176 | * XXXX - Active processors in Physical Processor Pool. | |
d3d2176a | 177 | * XXXX - Processors active on platform. |
1da177e4 LT |
178 | */ |
179 | static unsigned int h_get_ppp(unsigned long *entitled, | |
180 | unsigned long *unallocated, | |
181 | unsigned long *aggregation, | |
182 | unsigned long *resource) | |
183 | { | |
184 | unsigned long rc; | |
185 | rc = plpar_hcall_4out(H_GET_PPP, 0, 0, 0, 0, entitled, unallocated, | |
186 | aggregation, resource); | |
187 | ||
188 | log_plpar_hcall_return(rc, "H_GET_PPP"); | |
189 | ||
190 | return rc; | |
191 | } | |
192 | ||
193 | static void h_pic(unsigned long *pool_idle_time, unsigned long *num_procs) | |
194 | { | |
195 | unsigned long rc; | |
196 | unsigned long dummy; | |
197 | rc = plpar_hcall(H_PIC, 0, 0, 0, 0, pool_idle_time, num_procs, &dummy); | |
198 | ||
706c8c93 | 199 | if (rc != H_AUTHORITY) |
8acb888c | 200 | log_plpar_hcall_return(rc, "H_PIC"); |
1da177e4 LT |
201 | } |
202 | ||
1da177e4 LT |
203 | #define SPLPAR_CHARACTERISTICS_TOKEN 20 |
204 | #define SPLPAR_MAXLENGTH 1026*(sizeof(char)) | |
205 | ||
206 | /* | |
207 | * parse_system_parameter_string() | |
208 | * Retrieve the potential_processors, max_entitled_capacity and friends | |
209 | * through the get-system-parameter rtas call. Replace keyword strings as | |
210 | * necessary. | |
211 | */ | |
212 | static void parse_system_parameter_string(struct seq_file *m) | |
213 | { | |
214 | int call_status; | |
215 | ||
34422fed | 216 | unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL); |
1da177e4 LT |
217 | if (!local_buffer) { |
218 | printk(KERN_ERR "%s %s kmalloc failure at line %d \n", | |
219 | __FILE__, __FUNCTION__, __LINE__); | |
220 | return; | |
221 | } | |
222 | ||
223 | spin_lock(&rtas_data_buf_lock); | |
224 | memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH); | |
225 | call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1, | |
226 | NULL, | |
227 | SPLPAR_CHARACTERISTICS_TOKEN, | |
34422fed WS |
228 | __pa(rtas_data_buf), |
229 | RTAS_DATA_BUF_SIZE); | |
1da177e4 LT |
230 | memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH); |
231 | spin_unlock(&rtas_data_buf_lock); | |
232 | ||
233 | if (call_status != 0) { | |
234 | printk(KERN_INFO | |
235 | "%s %s Error calling get-system-parameter (0x%x)\n", | |
236 | __FILE__, __FUNCTION__, call_status); | |
237 | } else { | |
238 | int splpar_strlen; | |
239 | int idx, w_idx; | |
240 | char *workbuffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL); | |
241 | if (!workbuffer) { | |
242 | printk(KERN_ERR "%s %s kmalloc failure at line %d \n", | |
243 | __FILE__, __FUNCTION__, __LINE__); | |
d3d2176a | 244 | kfree(local_buffer); |
1da177e4 LT |
245 | return; |
246 | } | |
247 | #ifdef LPARCFG_DEBUG | |
248 | printk(KERN_INFO "success calling get-system-parameter \n"); | |
249 | #endif | |
34422fed | 250 | splpar_strlen = local_buffer[0] * 256 + local_buffer[1]; |
1da177e4 LT |
251 | local_buffer += 2; /* step over strlen value */ |
252 | ||
253 | memset(workbuffer, 0, SPLPAR_MAXLENGTH); | |
254 | w_idx = 0; | |
255 | idx = 0; | |
256 | while ((*local_buffer) && (idx < splpar_strlen)) { | |
257 | workbuffer[w_idx++] = local_buffer[idx++]; | |
258 | if ((local_buffer[idx] == ',') | |
259 | || (local_buffer[idx] == '\0')) { | |
260 | workbuffer[w_idx] = '\0'; | |
261 | if (w_idx) { | |
262 | /* avoid the empty string */ | |
263 | seq_printf(m, "%s\n", workbuffer); | |
264 | } | |
265 | memset(workbuffer, 0, SPLPAR_MAXLENGTH); | |
266 | idx++; /* skip the comma */ | |
267 | w_idx = 0; | |
268 | } else if (local_buffer[idx] == '=') { | |
269 | /* code here to replace workbuffer contents | |
270 | with different keyword strings */ | |
271 | if (0 == strcmp(workbuffer, "MaxEntCap")) { | |
272 | strcpy(workbuffer, | |
273 | "partition_max_entitled_capacity"); | |
274 | w_idx = strlen(workbuffer); | |
275 | } | |
276 | if (0 == strcmp(workbuffer, "MaxPlatProcs")) { | |
277 | strcpy(workbuffer, | |
278 | "system_potential_processors"); | |
279 | w_idx = strlen(workbuffer); | |
280 | } | |
281 | } | |
282 | } | |
283 | kfree(workbuffer); | |
284 | local_buffer -= 2; /* back up over strlen value */ | |
285 | } | |
286 | kfree(local_buffer); | |
287 | } | |
288 | ||
1da177e4 LT |
289 | /* Return the number of processors in the system. |
290 | * This function reads through the device tree and counts | |
291 | * the virtual processors, this does not include threads. | |
292 | */ | |
293 | static int lparcfg_count_active_processors(void) | |
294 | { | |
295 | struct device_node *cpus_dn = NULL; | |
296 | int count = 0; | |
297 | ||
298 | while ((cpus_dn = of_find_node_by_type(cpus_dn, "cpu"))) { | |
299 | #ifdef LPARCFG_DEBUG | |
300 | printk(KERN_ERR "cpus_dn %p \n", cpus_dn); | |
301 | #endif | |
302 | count++; | |
303 | } | |
304 | return count; | |
305 | } | |
306 | ||
16e9f994 | 307 | static int pseries_lparcfg_data(struct seq_file *m, void *v) |
1da177e4 LT |
308 | { |
309 | int partition_potential_processors; | |
310 | int partition_active_processors; | |
1da177e4 | 311 | struct device_node *rtas_node; |
a7f67bdf | 312 | const int *lrdrp = NULL; |
1da177e4 | 313 | |
1da177e4 | 314 | rtas_node = find_path_device("/rtas"); |
2b9a32ed | 315 | if (rtas_node) |
a7f67bdf | 316 | lrdrp = get_property(rtas_node, "ibm,lrdr-capacity", NULL); |
1da177e4 LT |
317 | |
318 | if (lrdrp == NULL) { | |
271c3f35 | 319 | partition_potential_processors = vdso_data->processorCount; |
1da177e4 LT |
320 | } else { |
321 | partition_potential_processors = *(lrdrp + 4); | |
322 | } | |
323 | ||
324 | partition_active_processors = lparcfg_count_active_processors(); | |
325 | ||
1ababe11 | 326 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) { |
1da177e4 LT |
327 | unsigned long h_entitled, h_unallocated; |
328 | unsigned long h_aggregation, h_resource; | |
329 | unsigned long pool_idle_time, pool_procs; | |
330 | unsigned long purr; | |
331 | ||
332 | h_get_ppp(&h_entitled, &h_unallocated, &h_aggregation, | |
333 | &h_resource); | |
334 | ||
335 | seq_printf(m, "R4=0x%lx\n", h_entitled); | |
336 | seq_printf(m, "R5=0x%lx\n", h_unallocated); | |
337 | seq_printf(m, "R6=0x%lx\n", h_aggregation); | |
338 | seq_printf(m, "R7=0x%lx\n", h_resource); | |
339 | ||
340 | purr = get_purr(); | |
341 | ||
342 | /* this call handles the ibm,get-system-parameter contents */ | |
343 | parse_system_parameter_string(m); | |
344 | ||
345 | seq_printf(m, "partition_entitled_capacity=%ld\n", h_entitled); | |
346 | ||
347 | seq_printf(m, "group=%ld\n", (h_aggregation >> 2 * 8) & 0xffff); | |
348 | ||
349 | seq_printf(m, "system_active_processors=%ld\n", | |
350 | (h_resource >> 0 * 8) & 0xffff); | |
351 | ||
352 | /* pool related entries are apropriate for shared configs */ | |
3356bb9f | 353 | if (lppaca[0].shared_proc) { |
1da177e4 LT |
354 | |
355 | h_pic(&pool_idle_time, &pool_procs); | |
356 | ||
357 | seq_printf(m, "pool=%ld\n", | |
358 | (h_aggregation >> 0 * 8) & 0xffff); | |
359 | ||
360 | /* report pool_capacity in percentage */ | |
361 | seq_printf(m, "pool_capacity=%ld\n", | |
362 | ((h_resource >> 2 * 8) & 0xffff) * 100); | |
363 | ||
364 | seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time); | |
365 | ||
366 | seq_printf(m, "pool_num_procs=%ld\n", pool_procs); | |
367 | } | |
368 | ||
369 | seq_printf(m, "unallocated_capacity_weight=%ld\n", | |
370 | (h_resource >> 4 * 8) & 0xFF); | |
371 | ||
372 | seq_printf(m, "capacity_weight=%ld\n", | |
373 | (h_resource >> 5 * 8) & 0xFF); | |
374 | ||
375 | seq_printf(m, "capped=%ld\n", (h_resource >> 6 * 8) & 0x01); | |
376 | ||
377 | seq_printf(m, "unallocated_capacity=%ld\n", h_unallocated); | |
378 | ||
379 | seq_printf(m, "purr=%ld\n", purr); | |
380 | ||
381 | } else { /* non SPLPAR case */ | |
382 | ||
383 | seq_printf(m, "system_active_processors=%d\n", | |
384 | partition_potential_processors); | |
385 | ||
386 | seq_printf(m, "system_potential_processors=%d\n", | |
387 | partition_potential_processors); | |
388 | ||
389 | seq_printf(m, "partition_max_entitled_capacity=%d\n", | |
390 | partition_potential_processors * 100); | |
391 | ||
392 | seq_printf(m, "partition_entitled_capacity=%d\n", | |
393 | partition_active_processors * 100); | |
394 | } | |
395 | ||
396 | seq_printf(m, "partition_active_processors=%d\n", | |
397 | partition_active_processors); | |
398 | ||
399 | seq_printf(m, "partition_potential_processors=%d\n", | |
400 | partition_potential_processors); | |
401 | ||
3356bb9f | 402 | seq_printf(m, "shared_processor_mode=%d\n", lppaca[0].shared_proc); |
1da177e4 LT |
403 | |
404 | return 0; | |
405 | } | |
406 | ||
407 | /* | |
408 | * Interface for changing system parameters (variable capacity weight | |
409 | * and entitled capacity). Format of input is "param_name=value"; | |
410 | * anything after value is ignored. Valid parameters at this time are | |
411 | * "partition_entitled_capacity" and "capacity_weight". We use | |
412 | * H_SET_PPP to alter parameters. | |
413 | * | |
414 | * This function should be invoked only on systems with | |
415 | * FW_FEATURE_SPLPAR. | |
416 | */ | |
417 | static ssize_t lparcfg_write(struct file *file, const char __user * buf, | |
418 | size_t count, loff_t * off) | |
419 | { | |
420 | char *kbuf; | |
421 | char *tmp; | |
422 | u64 new_entitled, *new_entitled_ptr = &new_entitled; | |
423 | u8 new_weight, *new_weight_ptr = &new_weight; | |
424 | ||
425 | unsigned long current_entitled; /* parameters for h_get_ppp */ | |
426 | unsigned long dummy; | |
427 | unsigned long resource; | |
428 | u8 current_weight; | |
429 | ||
430 | ssize_t retval = -ENOMEM; | |
431 | ||
432 | kbuf = kmalloc(count, GFP_KERNEL); | |
433 | if (!kbuf) | |
434 | goto out; | |
435 | ||
436 | retval = -EFAULT; | |
437 | if (copy_from_user(kbuf, buf, count)) | |
438 | goto out; | |
439 | ||
440 | retval = -EINVAL; | |
441 | kbuf[count - 1] = '\0'; | |
442 | tmp = strchr(kbuf, '='); | |
443 | if (!tmp) | |
444 | goto out; | |
445 | ||
446 | *tmp++ = '\0'; | |
447 | ||
448 | if (!strcmp(kbuf, "partition_entitled_capacity")) { | |
449 | char *endp; | |
450 | *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10); | |
451 | if (endp == tmp) | |
452 | goto out; | |
453 | new_weight_ptr = ¤t_weight; | |
454 | } else if (!strcmp(kbuf, "capacity_weight")) { | |
455 | char *endp; | |
456 | *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10); | |
457 | if (endp == tmp) | |
458 | goto out; | |
459 | new_entitled_ptr = ¤t_entitled; | |
460 | } else | |
461 | goto out; | |
462 | ||
463 | /* Get our current parameters */ | |
464 | retval = h_get_ppp(¤t_entitled, &dummy, &dummy, &resource); | |
465 | if (retval) { | |
466 | retval = -EIO; | |
467 | goto out; | |
468 | } | |
469 | ||
470 | current_weight = (resource >> 5 * 8) & 0xFF; | |
471 | ||
8ae5b280 | 472 | pr_debug("%s: current_entitled = %lu, current_weight = %u\n", |
1da177e4 LT |
473 | __FUNCTION__, current_entitled, current_weight); |
474 | ||
8ae5b280 | 475 | pr_debug("%s: new_entitled = %lu, new_weight = %u\n", |
1da177e4 LT |
476 | __FUNCTION__, *new_entitled_ptr, *new_weight_ptr); |
477 | ||
478 | retval = plpar_hcall_norets(H_SET_PPP, *new_entitled_ptr, | |
479 | *new_weight_ptr); | |
480 | ||
706c8c93 | 481 | if (retval == H_SUCCESS || retval == H_CONSTRAINED) { |
1da177e4 | 482 | retval = count; |
706c8c93 | 483 | } else if (retval == H_BUSY) { |
1da177e4 | 484 | retval = -EBUSY; |
706c8c93 | 485 | } else if (retval == H_HARDWARE) { |
1da177e4 | 486 | retval = -EIO; |
706c8c93 | 487 | } else if (retval == H_PARAMETER) { |
1da177e4 LT |
488 | retval = -EINVAL; |
489 | } else { | |
490 | printk(KERN_WARNING "%s: received unknown hv return code %ld", | |
491 | __FUNCTION__, retval); | |
492 | retval = -EIO; | |
493 | } | |
494 | ||
8acb888c | 495 | out: |
1da177e4 LT |
496 | kfree(kbuf); |
497 | return retval; | |
498 | } | |
499 | ||
16e9f994 SR |
500 | #else /* CONFIG_PPC_PSERIES */ |
501 | ||
502 | static int pseries_lparcfg_data(struct seq_file *m, void *v) | |
503 | { | |
504 | return 0; | |
505 | } | |
506 | ||
507 | static ssize_t lparcfg_write(struct file *file, const char __user * buf, | |
508 | size_t count, loff_t * off) | |
509 | { | |
510 | return count; | |
511 | } | |
512 | ||
1da177e4 LT |
513 | #endif /* CONFIG_PPC_PSERIES */ |
514 | ||
16e9f994 SR |
515 | static int lparcfg_data(struct seq_file *m, void *v) |
516 | { | |
517 | struct device_node *rootdn; | |
518 | const char *model = ""; | |
519 | const char *system_id = ""; | |
520 | const char *tmp; | |
a7f67bdf JK |
521 | const unsigned int *lp_index_ptr; |
522 | unsigned int lp_index = 0; | |
16e9f994 SR |
523 | |
524 | seq_printf(m, "%s %s \n", MODULE_NAME, MODULE_VERS); | |
525 | ||
526 | rootdn = find_path_device("/"); | |
527 | if (rootdn) { | |
528 | tmp = get_property(rootdn, "model", NULL); | |
529 | if (tmp) { | |
530 | model = tmp; | |
531 | /* Skip "IBM," - see platforms/iseries/dt.c */ | |
532 | if (firmware_has_feature(FW_FEATURE_ISERIES)) | |
533 | model += 4; | |
534 | } | |
535 | tmp = get_property(rootdn, "system-id", NULL); | |
536 | if (tmp) { | |
537 | system_id = tmp; | |
538 | /* Skip "IBM," - see platforms/iseries/dt.c */ | |
539 | if (firmware_has_feature(FW_FEATURE_ISERIES)) | |
540 | system_id += 4; | |
541 | } | |
a7f67bdf | 542 | lp_index_ptr = get_property(rootdn, "ibm,partition-no", NULL); |
16e9f994 SR |
543 | if (lp_index_ptr) |
544 | lp_index = *lp_index_ptr; | |
545 | } | |
546 | seq_printf(m, "serial_number=%s\n", system_id); | |
547 | seq_printf(m, "system_type=%s\n", model); | |
548 | seq_printf(m, "partition_id=%d\n", (int)lp_index); | |
549 | ||
550 | if (firmware_has_feature(FW_FEATURE_ISERIES)) | |
551 | return iseries_lparcfg_data(m, v); | |
552 | return pseries_lparcfg_data(m, v); | |
553 | } | |
554 | ||
1da177e4 LT |
555 | static int lparcfg_open(struct inode *inode, struct file *file) |
556 | { | |
557 | return single_open(file, lparcfg_data, NULL); | |
558 | } | |
559 | ||
560 | struct file_operations lparcfg_fops = { | |
8acb888c AB |
561 | .owner = THIS_MODULE, |
562 | .read = seq_read, | |
563 | .open = lparcfg_open, | |
564 | .release = single_release, | |
1da177e4 LT |
565 | }; |
566 | ||
567 | int __init lparcfg_init(void) | |
568 | { | |
569 | struct proc_dir_entry *ent; | |
71839267 | 570 | mode_t mode = S_IRUSR | S_IRGRP | S_IROTH; |
1da177e4 LT |
571 | |
572 | /* Allow writing if we have FW_FEATURE_SPLPAR */ | |
16e9f994 SR |
573 | if (firmware_has_feature(FW_FEATURE_SPLPAR) && |
574 | !firmware_has_feature(FW_FEATURE_ISERIES)) { | |
1da177e4 LT |
575 | lparcfg_fops.write = lparcfg_write; |
576 | mode |= S_IWUSR; | |
577 | } | |
578 | ||
579 | ent = create_proc_entry("ppc64/lparcfg", mode, NULL); | |
580 | if (ent) { | |
581 | ent->proc_fops = &lparcfg_fops; | |
582 | ent->data = kmalloc(LPARCFG_BUFF_SIZE, GFP_KERNEL); | |
583 | if (!ent->data) { | |
584 | printk(KERN_ERR | |
585 | "Failed to allocate buffer for lparcfg\n"); | |
586 | remove_proc_entry("lparcfg", ent->parent); | |
587 | return -ENOMEM; | |
588 | } | |
589 | } else { | |
590 | printk(KERN_ERR "Failed to create ppc64/lparcfg\n"); | |
591 | return -EIO; | |
592 | } | |
593 | ||
594 | proc_ppc64_lparcfg = ent; | |
595 | return 0; | |
596 | } | |
597 | ||
598 | void __exit lparcfg_cleanup(void) | |
599 | { | |
600 | if (proc_ppc64_lparcfg) { | |
b2325fe1 | 601 | kfree(proc_ppc64_lparcfg->data); |
1da177e4 LT |
602 | remove_proc_entry("lparcfg", proc_ppc64_lparcfg->parent); |
603 | } | |
604 | } | |
605 | ||
606 | module_init(lparcfg_init); | |
607 | module_exit(lparcfg_cleanup); | |
608 | MODULE_DESCRIPTION("Interface for LPAR configuration data"); | |
609 | MODULE_AUTHOR("Dave Engebretsen"); | |
610 | MODULE_LICENSE("GPL"); |