Commit | Line | Data |
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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 | ||
21 | #include <linux/config.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/types.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/proc_fs.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/seq_file.h> | |
28 | #include <asm/uaccess.h> | |
15b17189 | 29 | #include <asm/iseries/hv_lp_config.h> |
1da177e4 | 30 | #include <asm/lppaca.h> |
1da177e4 | 31 | #include <asm/hvcall.h> |
1ababe11 | 32 | #include <asm/firmware.h> |
1da177e4 LT |
33 | #include <asm/rtas.h> |
34 | #include <asm/system.h> | |
35 | #include <asm/time.h> | |
7b487bb8 | 36 | #include <asm/iseries/it_exp_vpd_panel.h> |
856509d5 | 37 | #include <asm/prom.h> |
271c3f35 | 38 | #include <asm/vdso_datapage.h> |
1da177e4 LT |
39 | |
40 | #define MODULE_VERS "1.6" | |
41 | #define MODULE_NAME "lparcfg" | |
42 | ||
43 | /* #define LPARCFG_DEBUG */ | |
44 | ||
1da177e4 LT |
45 | static struct proc_dir_entry *proc_ppc64_lparcfg; |
46 | #define LPARCFG_BUFF_SIZE 4096 | |
47 | ||
48 | #ifdef CONFIG_PPC_ISERIES | |
49 | ||
50 | /* | |
51 | * For iSeries legacy systems, the PPA purr function is available from the | |
52 | * emulated_time_base field in the paca. | |
53 | */ | |
54 | static unsigned long get_purr(void) | |
55 | { | |
56 | unsigned long sum_purr = 0; | |
57 | int cpu; | |
1da177e4 LT |
58 | |
59 | for_each_cpu(cpu) { | |
3356bb9f | 60 | sum_purr += lppaca[cpu].emulated_time_base; |
1da177e4 LT |
61 | |
62 | #ifdef PURR_DEBUG | |
63 | printk(KERN_INFO "get_purr for cpu (%d) has value (%ld) \n", | |
3356bb9f | 64 | cpu, lppaca[cpu].emulated_time_base); |
1da177e4 LT |
65 | #endif |
66 | } | |
67 | return sum_purr; | |
68 | } | |
69 | ||
70 | #define lparcfg_write NULL | |
71 | ||
d3d2176a | 72 | /* |
1da177e4 LT |
73 | * Methods used to fetch LPAR data when running on an iSeries platform. |
74 | */ | |
75 | static int lparcfg_data(struct seq_file *m, void *v) | |
76 | { | |
77 | unsigned long pool_id, lp_index; | |
78 | int shared, entitled_capacity, max_entitled_capacity; | |
79 | int processors, max_processors; | |
1da177e4 LT |
80 | unsigned long purr = get_purr(); |
81 | ||
82 | seq_printf(m, "%s %s \n", MODULE_NAME, MODULE_VERS); | |
83 | ||
3356bb9f | 84 | shared = (int)(get_lppaca()->shared_proc); |
1da177e4 LT |
85 | seq_printf(m, "serial_number=%c%c%c%c%c%c%c\n", |
86 | e2a(xItExtVpdPanel.mfgID[2]), | |
87 | e2a(xItExtVpdPanel.mfgID[3]), | |
88 | e2a(xItExtVpdPanel.systemSerial[1]), | |
89 | e2a(xItExtVpdPanel.systemSerial[2]), | |
90 | e2a(xItExtVpdPanel.systemSerial[3]), | |
91 | e2a(xItExtVpdPanel.systemSerial[4]), | |
92 | e2a(xItExtVpdPanel.systemSerial[5])); | |
93 | ||
94 | seq_printf(m, "system_type=%c%c%c%c\n", | |
95 | e2a(xItExtVpdPanel.machineType[0]), | |
96 | e2a(xItExtVpdPanel.machineType[1]), | |
97 | e2a(xItExtVpdPanel.machineType[2]), | |
98 | e2a(xItExtVpdPanel.machineType[3])); | |
99 | ||
100 | lp_index = HvLpConfig_getLpIndex(); | |
101 | seq_printf(m, "partition_id=%d\n", (int)lp_index); | |
102 | ||
103 | seq_printf(m, "system_active_processors=%d\n", | |
104 | (int)HvLpConfig_getSystemPhysicalProcessors()); | |
105 | ||
106 | seq_printf(m, "system_potential_processors=%d\n", | |
107 | (int)HvLpConfig_getSystemPhysicalProcessors()); | |
108 | ||
109 | processors = (int)HvLpConfig_getPhysicalProcessors(); | |
110 | seq_printf(m, "partition_active_processors=%d\n", processors); | |
111 | ||
112 | max_processors = (int)HvLpConfig_getMaxPhysicalProcessors(); | |
113 | seq_printf(m, "partition_potential_processors=%d\n", max_processors); | |
114 | ||
115 | if (shared) { | |
116 | entitled_capacity = HvLpConfig_getSharedProcUnits(); | |
117 | max_entitled_capacity = HvLpConfig_getMaxSharedProcUnits(); | |
118 | } else { | |
119 | entitled_capacity = processors * 100; | |
120 | max_entitled_capacity = max_processors * 100; | |
121 | } | |
122 | seq_printf(m, "partition_entitled_capacity=%d\n", entitled_capacity); | |
123 | ||
124 | seq_printf(m, "partition_max_entitled_capacity=%d\n", | |
125 | max_entitled_capacity); | |
126 | ||
127 | if (shared) { | |
128 | pool_id = HvLpConfig_getSharedPoolIndex(); | |
129 | seq_printf(m, "pool=%d\n", (int)pool_id); | |
130 | seq_printf(m, "pool_capacity=%d\n", | |
131 | (int)(HvLpConfig_getNumProcsInSharedPool(pool_id) * | |
132 | 100)); | |
133 | seq_printf(m, "purr=%ld\n", purr); | |
134 | } | |
135 | ||
136 | seq_printf(m, "shared_processor_mode=%d\n", shared); | |
137 | ||
138 | return 0; | |
139 | } | |
140 | #endif /* CONFIG_PPC_ISERIES */ | |
141 | ||
142 | #ifdef CONFIG_PPC_PSERIES | |
d3d2176a | 143 | /* |
1da177e4 LT |
144 | * Methods used to fetch LPAR data when running on a pSeries platform. |
145 | */ | |
d7867959 SR |
146 | /* find a better place for this function... */ |
147 | static void log_plpar_hcall_return(unsigned long rc, char *tag) | |
148 | { | |
149 | if (rc == 0) /* success, return */ | |
150 | return; | |
151 | /* check for null tag ? */ | |
152 | if (rc == H_Hardware) | |
153 | printk(KERN_INFO | |
154 | "plpar-hcall (%s) failed with hardware fault\n", tag); | |
155 | else if (rc == H_Function) | |
156 | printk(KERN_INFO | |
157 | "plpar-hcall (%s) failed; function not allowed\n", tag); | |
158 | else if (rc == H_Authority) | |
159 | printk(KERN_INFO | |
160 | "plpar-hcall (%s) failed; not authorized to this function\n", | |
161 | tag); | |
162 | else if (rc == H_Parameter) | |
163 | printk(KERN_INFO "plpar-hcall (%s) failed; Bad parameter(s)\n", | |
164 | tag); | |
165 | else | |
166 | printk(KERN_INFO | |
167 | "plpar-hcall (%s) failed with unexpected rc(0x%lx)\n", | |
168 | tag, rc); | |
169 | ||
170 | } | |
1da177e4 LT |
171 | |
172 | /* | |
173 | * H_GET_PPP hcall returns info in 4 parms. | |
174 | * entitled_capacity,unallocated_capacity, | |
175 | * aggregation, resource_capability). | |
176 | * | |
d3d2176a | 177 | * R4 = Entitled Processor Capacity Percentage. |
1da177e4 LT |
178 | * R5 = Unallocated Processor Capacity Percentage. |
179 | * R6 (AABBCCDDEEFFGGHH). | |
180 | * XXXX - reserved (0) | |
181 | * XXXX - reserved (0) | |
182 | * XXXX - Group Number | |
183 | * XXXX - Pool Number. | |
184 | * R7 (IIJJKKLLMMNNOOPP). | |
185 | * XX - reserved. (0) | |
186 | * XX - bit 0-6 reserved (0). bit 7 is Capped indicator. | |
187 | * XX - variable processor Capacity Weight | |
188 | * XX - Unallocated Variable Processor Capacity Weight. | |
189 | * XXXX - Active processors in Physical Processor Pool. | |
d3d2176a | 190 | * XXXX - Processors active on platform. |
1da177e4 LT |
191 | */ |
192 | static unsigned int h_get_ppp(unsigned long *entitled, | |
193 | unsigned long *unallocated, | |
194 | unsigned long *aggregation, | |
195 | unsigned long *resource) | |
196 | { | |
197 | unsigned long rc; | |
198 | rc = plpar_hcall_4out(H_GET_PPP, 0, 0, 0, 0, entitled, unallocated, | |
199 | aggregation, resource); | |
200 | ||
201 | log_plpar_hcall_return(rc, "H_GET_PPP"); | |
202 | ||
203 | return rc; | |
204 | } | |
205 | ||
206 | static void h_pic(unsigned long *pool_idle_time, unsigned long *num_procs) | |
207 | { | |
208 | unsigned long rc; | |
209 | unsigned long dummy; | |
210 | rc = plpar_hcall(H_PIC, 0, 0, 0, 0, pool_idle_time, num_procs, &dummy); | |
211 | ||
8acb888c AB |
212 | if (rc != H_Authority) |
213 | log_plpar_hcall_return(rc, "H_PIC"); | |
1da177e4 LT |
214 | } |
215 | ||
1da177e4 LT |
216 | /* Track sum of all purrs across all processors. This is used to further */ |
217 | /* calculate usage values by different applications */ | |
218 | ||
219 | static unsigned long get_purr(void) | |
220 | { | |
221 | unsigned long sum_purr = 0; | |
222 | int cpu; | |
223 | struct cpu_usage *cu; | |
224 | ||
225 | for_each_cpu(cpu) { | |
226 | cu = &per_cpu(cpu_usage_array, cpu); | |
227 | sum_purr += cu->current_tb; | |
228 | } | |
229 | return sum_purr; | |
230 | } | |
231 | ||
232 | #define SPLPAR_CHARACTERISTICS_TOKEN 20 | |
233 | #define SPLPAR_MAXLENGTH 1026*(sizeof(char)) | |
234 | ||
235 | /* | |
236 | * parse_system_parameter_string() | |
237 | * Retrieve the potential_processors, max_entitled_capacity and friends | |
238 | * through the get-system-parameter rtas call. Replace keyword strings as | |
239 | * necessary. | |
240 | */ | |
241 | static void parse_system_parameter_string(struct seq_file *m) | |
242 | { | |
243 | int call_status; | |
244 | ||
245 | char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL); | |
246 | if (!local_buffer) { | |
247 | printk(KERN_ERR "%s %s kmalloc failure at line %d \n", | |
248 | __FILE__, __FUNCTION__, __LINE__); | |
249 | return; | |
250 | } | |
251 | ||
252 | spin_lock(&rtas_data_buf_lock); | |
253 | memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH); | |
254 | call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1, | |
255 | NULL, | |
256 | SPLPAR_CHARACTERISTICS_TOKEN, | |
257 | __pa(rtas_data_buf)); | |
258 | memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH); | |
259 | spin_unlock(&rtas_data_buf_lock); | |
260 | ||
261 | if (call_status != 0) { | |
262 | printk(KERN_INFO | |
263 | "%s %s Error calling get-system-parameter (0x%x)\n", | |
264 | __FILE__, __FUNCTION__, call_status); | |
265 | } else { | |
266 | int splpar_strlen; | |
267 | int idx, w_idx; | |
268 | char *workbuffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL); | |
269 | if (!workbuffer) { | |
270 | printk(KERN_ERR "%s %s kmalloc failure at line %d \n", | |
271 | __FILE__, __FUNCTION__, __LINE__); | |
d3d2176a | 272 | kfree(local_buffer); |
1da177e4 LT |
273 | return; |
274 | } | |
275 | #ifdef LPARCFG_DEBUG | |
276 | printk(KERN_INFO "success calling get-system-parameter \n"); | |
277 | #endif | |
278 | splpar_strlen = local_buffer[0] * 16 + local_buffer[1]; | |
279 | local_buffer += 2; /* step over strlen value */ | |
280 | ||
281 | memset(workbuffer, 0, SPLPAR_MAXLENGTH); | |
282 | w_idx = 0; | |
283 | idx = 0; | |
284 | while ((*local_buffer) && (idx < splpar_strlen)) { | |
285 | workbuffer[w_idx++] = local_buffer[idx++]; | |
286 | if ((local_buffer[idx] == ',') | |
287 | || (local_buffer[idx] == '\0')) { | |
288 | workbuffer[w_idx] = '\0'; | |
289 | if (w_idx) { | |
290 | /* avoid the empty string */ | |
291 | seq_printf(m, "%s\n", workbuffer); | |
292 | } | |
293 | memset(workbuffer, 0, SPLPAR_MAXLENGTH); | |
294 | idx++; /* skip the comma */ | |
295 | w_idx = 0; | |
296 | } else if (local_buffer[idx] == '=') { | |
297 | /* code here to replace workbuffer contents | |
298 | with different keyword strings */ | |
299 | if (0 == strcmp(workbuffer, "MaxEntCap")) { | |
300 | strcpy(workbuffer, | |
301 | "partition_max_entitled_capacity"); | |
302 | w_idx = strlen(workbuffer); | |
303 | } | |
304 | if (0 == strcmp(workbuffer, "MaxPlatProcs")) { | |
305 | strcpy(workbuffer, | |
306 | "system_potential_processors"); | |
307 | w_idx = strlen(workbuffer); | |
308 | } | |
309 | } | |
310 | } | |
311 | kfree(workbuffer); | |
312 | local_buffer -= 2; /* back up over strlen value */ | |
313 | } | |
314 | kfree(local_buffer); | |
315 | } | |
316 | ||
1da177e4 LT |
317 | /* Return the number of processors in the system. |
318 | * This function reads through the device tree and counts | |
319 | * the virtual processors, this does not include threads. | |
320 | */ | |
321 | static int lparcfg_count_active_processors(void) | |
322 | { | |
323 | struct device_node *cpus_dn = NULL; | |
324 | int count = 0; | |
325 | ||
326 | while ((cpus_dn = of_find_node_by_type(cpus_dn, "cpu"))) { | |
327 | #ifdef LPARCFG_DEBUG | |
328 | printk(KERN_ERR "cpus_dn %p \n", cpus_dn); | |
329 | #endif | |
330 | count++; | |
331 | } | |
332 | return count; | |
333 | } | |
334 | ||
335 | static int lparcfg_data(struct seq_file *m, void *v) | |
336 | { | |
337 | int partition_potential_processors; | |
338 | int partition_active_processors; | |
339 | struct device_node *rootdn; | |
340 | const char *model = ""; | |
341 | const char *system_id = ""; | |
342 | unsigned int *lp_index_ptr, lp_index = 0; | |
343 | struct device_node *rtas_node; | |
2b9a32ed | 344 | int *lrdrp = NULL; |
1da177e4 LT |
345 | |
346 | rootdn = find_path_device("/"); | |
347 | if (rootdn) { | |
348 | model = get_property(rootdn, "model", NULL); | |
349 | system_id = get_property(rootdn, "system-id", NULL); | |
350 | lp_index_ptr = (unsigned int *) | |
351 | get_property(rootdn, "ibm,partition-no", NULL); | |
352 | if (lp_index_ptr) | |
353 | lp_index = *lp_index_ptr; | |
354 | } | |
355 | ||
356 | seq_printf(m, "%s %s \n", MODULE_NAME, MODULE_VERS); | |
357 | ||
358 | seq_printf(m, "serial_number=%s\n", system_id); | |
359 | ||
360 | seq_printf(m, "system_type=%s\n", model); | |
361 | ||
362 | seq_printf(m, "partition_id=%d\n", (int)lp_index); | |
363 | ||
364 | rtas_node = find_path_device("/rtas"); | |
2b9a32ed OJ |
365 | if (rtas_node) |
366 | lrdrp = (int *)get_property(rtas_node, "ibm,lrdr-capacity", | |
367 | NULL); | |
1da177e4 LT |
368 | |
369 | if (lrdrp == NULL) { | |
271c3f35 | 370 | partition_potential_processors = vdso_data->processorCount; |
1da177e4 LT |
371 | } else { |
372 | partition_potential_processors = *(lrdrp + 4); | |
373 | } | |
374 | ||
375 | partition_active_processors = lparcfg_count_active_processors(); | |
376 | ||
1ababe11 | 377 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) { |
1da177e4 LT |
378 | unsigned long h_entitled, h_unallocated; |
379 | unsigned long h_aggregation, h_resource; | |
380 | unsigned long pool_idle_time, pool_procs; | |
381 | unsigned long purr; | |
382 | ||
383 | h_get_ppp(&h_entitled, &h_unallocated, &h_aggregation, | |
384 | &h_resource); | |
385 | ||
386 | seq_printf(m, "R4=0x%lx\n", h_entitled); | |
387 | seq_printf(m, "R5=0x%lx\n", h_unallocated); | |
388 | seq_printf(m, "R6=0x%lx\n", h_aggregation); | |
389 | seq_printf(m, "R7=0x%lx\n", h_resource); | |
390 | ||
391 | purr = get_purr(); | |
392 | ||
393 | /* this call handles the ibm,get-system-parameter contents */ | |
394 | parse_system_parameter_string(m); | |
395 | ||
396 | seq_printf(m, "partition_entitled_capacity=%ld\n", h_entitled); | |
397 | ||
398 | seq_printf(m, "group=%ld\n", (h_aggregation >> 2 * 8) & 0xffff); | |
399 | ||
400 | seq_printf(m, "system_active_processors=%ld\n", | |
401 | (h_resource >> 0 * 8) & 0xffff); | |
402 | ||
403 | /* pool related entries are apropriate for shared configs */ | |
3356bb9f | 404 | if (lppaca[0].shared_proc) { |
1da177e4 LT |
405 | |
406 | h_pic(&pool_idle_time, &pool_procs); | |
407 | ||
408 | seq_printf(m, "pool=%ld\n", | |
409 | (h_aggregation >> 0 * 8) & 0xffff); | |
410 | ||
411 | /* report pool_capacity in percentage */ | |
412 | seq_printf(m, "pool_capacity=%ld\n", | |
413 | ((h_resource >> 2 * 8) & 0xffff) * 100); | |
414 | ||
415 | seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time); | |
416 | ||
417 | seq_printf(m, "pool_num_procs=%ld\n", pool_procs); | |
418 | } | |
419 | ||
420 | seq_printf(m, "unallocated_capacity_weight=%ld\n", | |
421 | (h_resource >> 4 * 8) & 0xFF); | |
422 | ||
423 | seq_printf(m, "capacity_weight=%ld\n", | |
424 | (h_resource >> 5 * 8) & 0xFF); | |
425 | ||
426 | seq_printf(m, "capped=%ld\n", (h_resource >> 6 * 8) & 0x01); | |
427 | ||
428 | seq_printf(m, "unallocated_capacity=%ld\n", h_unallocated); | |
429 | ||
430 | seq_printf(m, "purr=%ld\n", purr); | |
431 | ||
432 | } else { /* non SPLPAR case */ | |
433 | ||
434 | seq_printf(m, "system_active_processors=%d\n", | |
435 | partition_potential_processors); | |
436 | ||
437 | seq_printf(m, "system_potential_processors=%d\n", | |
438 | partition_potential_processors); | |
439 | ||
440 | seq_printf(m, "partition_max_entitled_capacity=%d\n", | |
441 | partition_potential_processors * 100); | |
442 | ||
443 | seq_printf(m, "partition_entitled_capacity=%d\n", | |
444 | partition_active_processors * 100); | |
445 | } | |
446 | ||
447 | seq_printf(m, "partition_active_processors=%d\n", | |
448 | partition_active_processors); | |
449 | ||
450 | seq_printf(m, "partition_potential_processors=%d\n", | |
451 | partition_potential_processors); | |
452 | ||
3356bb9f | 453 | seq_printf(m, "shared_processor_mode=%d\n", lppaca[0].shared_proc); |
1da177e4 LT |
454 | |
455 | return 0; | |
456 | } | |
457 | ||
458 | /* | |
459 | * Interface for changing system parameters (variable capacity weight | |
460 | * and entitled capacity). Format of input is "param_name=value"; | |
461 | * anything after value is ignored. Valid parameters at this time are | |
462 | * "partition_entitled_capacity" and "capacity_weight". We use | |
463 | * H_SET_PPP to alter parameters. | |
464 | * | |
465 | * This function should be invoked only on systems with | |
466 | * FW_FEATURE_SPLPAR. | |
467 | */ | |
468 | static ssize_t lparcfg_write(struct file *file, const char __user * buf, | |
469 | size_t count, loff_t * off) | |
470 | { | |
471 | char *kbuf; | |
472 | char *tmp; | |
473 | u64 new_entitled, *new_entitled_ptr = &new_entitled; | |
474 | u8 new_weight, *new_weight_ptr = &new_weight; | |
475 | ||
476 | unsigned long current_entitled; /* parameters for h_get_ppp */ | |
477 | unsigned long dummy; | |
478 | unsigned long resource; | |
479 | u8 current_weight; | |
480 | ||
481 | ssize_t retval = -ENOMEM; | |
482 | ||
483 | kbuf = kmalloc(count, GFP_KERNEL); | |
484 | if (!kbuf) | |
485 | goto out; | |
486 | ||
487 | retval = -EFAULT; | |
488 | if (copy_from_user(kbuf, buf, count)) | |
489 | goto out; | |
490 | ||
491 | retval = -EINVAL; | |
492 | kbuf[count - 1] = '\0'; | |
493 | tmp = strchr(kbuf, '='); | |
494 | if (!tmp) | |
495 | goto out; | |
496 | ||
497 | *tmp++ = '\0'; | |
498 | ||
499 | if (!strcmp(kbuf, "partition_entitled_capacity")) { | |
500 | char *endp; | |
501 | *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10); | |
502 | if (endp == tmp) | |
503 | goto out; | |
504 | new_weight_ptr = ¤t_weight; | |
505 | } else if (!strcmp(kbuf, "capacity_weight")) { | |
506 | char *endp; | |
507 | *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10); | |
508 | if (endp == tmp) | |
509 | goto out; | |
510 | new_entitled_ptr = ¤t_entitled; | |
511 | } else | |
512 | goto out; | |
513 | ||
514 | /* Get our current parameters */ | |
515 | retval = h_get_ppp(¤t_entitled, &dummy, &dummy, &resource); | |
516 | if (retval) { | |
517 | retval = -EIO; | |
518 | goto out; | |
519 | } | |
520 | ||
521 | current_weight = (resource >> 5 * 8) & 0xFF; | |
522 | ||
523 | pr_debug("%s: current_entitled = %lu, current_weight = %lu\n", | |
524 | __FUNCTION__, current_entitled, current_weight); | |
525 | ||
526 | pr_debug("%s: new_entitled = %lu, new_weight = %lu\n", | |
527 | __FUNCTION__, *new_entitled_ptr, *new_weight_ptr); | |
528 | ||
529 | retval = plpar_hcall_norets(H_SET_PPP, *new_entitled_ptr, | |
530 | *new_weight_ptr); | |
531 | ||
532 | if (retval == H_Success || retval == H_Constrained) { | |
533 | retval = count; | |
534 | } else if (retval == H_Busy) { | |
535 | retval = -EBUSY; | |
536 | } else if (retval == H_Hardware) { | |
537 | retval = -EIO; | |
538 | } else if (retval == H_Parameter) { | |
539 | retval = -EINVAL; | |
540 | } else { | |
541 | printk(KERN_WARNING "%s: received unknown hv return code %ld", | |
542 | __FUNCTION__, retval); | |
543 | retval = -EIO; | |
544 | } | |
545 | ||
8acb888c | 546 | out: |
1da177e4 LT |
547 | kfree(kbuf); |
548 | return retval; | |
549 | } | |
550 | ||
551 | #endif /* CONFIG_PPC_PSERIES */ | |
552 | ||
553 | static int lparcfg_open(struct inode *inode, struct file *file) | |
554 | { | |
555 | return single_open(file, lparcfg_data, NULL); | |
556 | } | |
557 | ||
558 | struct file_operations lparcfg_fops = { | |
8acb888c AB |
559 | .owner = THIS_MODULE, |
560 | .read = seq_read, | |
561 | .open = lparcfg_open, | |
562 | .release = single_release, | |
1da177e4 LT |
563 | }; |
564 | ||
565 | int __init lparcfg_init(void) | |
566 | { | |
567 | struct proc_dir_entry *ent; | |
71839267 | 568 | mode_t mode = S_IRUSR | S_IRGRP | S_IROTH; |
1da177e4 LT |
569 | |
570 | /* Allow writing if we have FW_FEATURE_SPLPAR */ | |
1ababe11 | 571 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) { |
1da177e4 LT |
572 | lparcfg_fops.write = lparcfg_write; |
573 | mode |= S_IWUSR; | |
574 | } | |
575 | ||
576 | ent = create_proc_entry("ppc64/lparcfg", mode, NULL); | |
577 | if (ent) { | |
578 | ent->proc_fops = &lparcfg_fops; | |
579 | ent->data = kmalloc(LPARCFG_BUFF_SIZE, GFP_KERNEL); | |
580 | if (!ent->data) { | |
581 | printk(KERN_ERR | |
582 | "Failed to allocate buffer for lparcfg\n"); | |
583 | remove_proc_entry("lparcfg", ent->parent); | |
584 | return -ENOMEM; | |
585 | } | |
586 | } else { | |
587 | printk(KERN_ERR "Failed to create ppc64/lparcfg\n"); | |
588 | return -EIO; | |
589 | } | |
590 | ||
591 | proc_ppc64_lparcfg = ent; | |
592 | return 0; | |
593 | } | |
594 | ||
595 | void __exit lparcfg_cleanup(void) | |
596 | { | |
597 | if (proc_ppc64_lparcfg) { | |
b2325fe1 | 598 | kfree(proc_ppc64_lparcfg->data); |
1da177e4 LT |
599 | remove_proc_entry("lparcfg", proc_ppc64_lparcfg->parent); |
600 | } | |
601 | } | |
602 | ||
603 | module_init(lparcfg_init); | |
604 | module_exit(lparcfg_cleanup); | |
605 | MODULE_DESCRIPTION("Interface for LPAR configuration data"); | |
606 | MODULE_AUTHOR("Dave Engebretsen"); | |
607 | MODULE_LICENSE("GPL"); |