]>
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> |
22e1a4dd | 37 | #include <asm/vio.h> |
1da177e4 | 38 | |
dfc3403f | 39 | #define MODULE_VERS "1.8" |
1da177e4 LT |
40 | #define MODULE_NAME "lparcfg" |
41 | ||
42 | /* #define LPARCFG_DEBUG */ | |
43 | ||
1da177e4 | 44 | static struct proc_dir_entry *proc_ppc64_lparcfg; |
1da177e4 | 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 | ||
048c8bc9 | 80 | shared = (int)(local_paca->lppaca_ptr->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 | */ | |
dfc3403f NF |
133 | /** |
134 | * h_get_mpp | |
135 | * H_GET_MPP hcall returns info in 7 parms | |
136 | */ | |
137 | int h_get_mpp(struct hvcall_mpp_data *mpp_data) | |
138 | { | |
139 | int rc; | |
140 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; | |
141 | ||
142 | rc = plpar_hcall9(H_GET_MPP, retbuf); | |
143 | ||
144 | mpp_data->entitled_mem = retbuf[0]; | |
145 | mpp_data->mapped_mem = retbuf[1]; | |
146 | ||
147 | mpp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff; | |
148 | mpp_data->pool_num = retbuf[2] & 0xffff; | |
149 | ||
150 | mpp_data->mem_weight = (retbuf[3] >> 7 * 8) & 0xff; | |
151 | mpp_data->unallocated_mem_weight = (retbuf[3] >> 6 * 8) & 0xff; | |
152 | mpp_data->unallocated_entitlement = retbuf[3] & 0xffffffffffff; | |
153 | ||
154 | mpp_data->pool_size = retbuf[4]; | |
155 | mpp_data->loan_request = retbuf[5]; | |
156 | mpp_data->backing_mem = retbuf[6]; | |
157 | ||
158 | return rc; | |
159 | } | |
160 | EXPORT_SYMBOL(h_get_mpp); | |
161 | ||
398778f7 RJ |
162 | struct hvcall_ppp_data { |
163 | u64 entitlement; | |
164 | u64 unallocated_entitlement; | |
165 | u16 group_num; | |
166 | u16 pool_num; | |
167 | u8 capped; | |
168 | u8 weight; | |
169 | u8 unallocated_weight; | |
170 | u16 active_procs_in_pool; | |
171 | u16 active_system_procs; | |
172 | }; | |
173 | ||
1da177e4 LT |
174 | /* |
175 | * H_GET_PPP hcall returns info in 4 parms. | |
176 | * entitled_capacity,unallocated_capacity, | |
177 | * aggregation, resource_capability). | |
178 | * | |
d3d2176a | 179 | * R4 = Entitled Processor Capacity Percentage. |
1da177e4 LT |
180 | * R5 = Unallocated Processor Capacity Percentage. |
181 | * R6 (AABBCCDDEEFFGGHH). | |
182 | * XXXX - reserved (0) | |
183 | * XXXX - reserved (0) | |
184 | * XXXX - Group Number | |
185 | * XXXX - Pool Number. | |
186 | * R7 (IIJJKKLLMMNNOOPP). | |
187 | * XX - reserved. (0) | |
188 | * XX - bit 0-6 reserved (0). bit 7 is Capped indicator. | |
189 | * XX - variable processor Capacity Weight | |
190 | * XX - Unallocated Variable Processor Capacity Weight. | |
191 | * XXXX - Active processors in Physical Processor Pool. | |
d3d2176a | 192 | * XXXX - Processors active on platform. |
1da177e4 | 193 | */ |
398778f7 | 194 | static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data) |
1da177e4 LT |
195 | { |
196 | unsigned long rc; | |
b9377ffc AB |
197 | unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; |
198 | ||
199 | rc = plpar_hcall(H_GET_PPP, retbuf); | |
200 | ||
398778f7 RJ |
201 | ppp_data->entitlement = retbuf[0]; |
202 | ppp_data->unallocated_entitlement = retbuf[1]; | |
203 | ||
204 | ppp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff; | |
205 | ppp_data->pool_num = retbuf[2] & 0xffff; | |
206 | ||
207 | ppp_data->capped = (retbuf[3] >> 6 * 8) & 0x01; | |
208 | ppp_data->weight = (retbuf[3] >> 5 * 8) & 0xff; | |
209 | ppp_data->unallocated_weight = (retbuf[3] >> 4 * 8) & 0xff; | |
210 | ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff; | |
211 | ppp_data->active_system_procs = retbuf[3] & 0xffff; | |
1da177e4 | 212 | |
1da177e4 LT |
213 | return rc; |
214 | } | |
215 | ||
11529396 NF |
216 | static unsigned h_pic(unsigned long *pool_idle_time, |
217 | unsigned long *num_procs) | |
1da177e4 LT |
218 | { |
219 | unsigned long rc; | |
b9377ffc AB |
220 | unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; |
221 | ||
222 | rc = plpar_hcall(H_PIC, retbuf); | |
223 | ||
224 | *pool_idle_time = retbuf[0]; | |
225 | *num_procs = retbuf[1]; | |
11529396 NF |
226 | |
227 | return rc; | |
228 | } | |
229 | ||
230 | /* | |
231 | * parse_ppp_data | |
232 | * Parse out the data returned from h_get_ppp and h_pic | |
233 | */ | |
234 | static void parse_ppp_data(struct seq_file *m) | |
235 | { | |
398778f7 | 236 | struct hvcall_ppp_data ppp_data; |
11529396 NF |
237 | int rc; |
238 | ||
398778f7 | 239 | rc = h_get_ppp(&ppp_data); |
11529396 NF |
240 | if (rc) |
241 | return; | |
242 | ||
398778f7 RJ |
243 | seq_printf(m, "partition_entitled_capacity=%ld\n", |
244 | ppp_data.entitlement); | |
245 | seq_printf(m, "group=%d\n", ppp_data.group_num); | |
246 | seq_printf(m, "system_active_processors=%d\n", | |
247 | ppp_data.active_system_procs); | |
11529396 NF |
248 | |
249 | /* pool related entries are apropriate for shared configs */ | |
250 | if (lppaca[0].shared_proc) { | |
251 | unsigned long pool_idle_time, pool_procs; | |
252 | ||
398778f7 | 253 | seq_printf(m, "pool=%d\n", ppp_data.pool_num); |
11529396 NF |
254 | |
255 | /* report pool_capacity in percentage */ | |
398778f7 RJ |
256 | seq_printf(m, "pool_capacity=%d\n", |
257 | ppp_data.active_procs_in_pool * 100); | |
11529396 NF |
258 | |
259 | h_pic(&pool_idle_time, &pool_procs); | |
260 | seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time); | |
261 | seq_printf(m, "pool_num_procs=%ld\n", pool_procs); | |
262 | } | |
263 | ||
398778f7 RJ |
264 | seq_printf(m, "unallocated_capacity_weight=%d\n", |
265 | ppp_data.unallocated_weight); | |
266 | seq_printf(m, "capacity_weight=%d\n", ppp_data.weight); | |
267 | seq_printf(m, "capped=%d\n", ppp_data.capped); | |
268 | seq_printf(m, "unallocated_capacity=%ld\n", | |
269 | ppp_data.unallocated_entitlement); | |
1da177e4 LT |
270 | } |
271 | ||
dfc3403f NF |
272 | /** |
273 | * parse_mpp_data | |
274 | * Parse out data returned from h_get_mpp | |
275 | */ | |
276 | static void parse_mpp_data(struct seq_file *m) | |
277 | { | |
278 | struct hvcall_mpp_data mpp_data; | |
279 | int rc; | |
280 | ||
281 | rc = h_get_mpp(&mpp_data); | |
282 | if (rc) | |
283 | return; | |
284 | ||
285 | seq_printf(m, "entitled_memory=%ld\n", mpp_data.entitled_mem); | |
286 | ||
287 | if (mpp_data.mapped_mem != -1) | |
288 | seq_printf(m, "mapped_entitled_memory=%ld\n", | |
289 | mpp_data.mapped_mem); | |
290 | ||
291 | seq_printf(m, "entitled_memory_group_number=%d\n", mpp_data.group_num); | |
292 | seq_printf(m, "entitled_memory_pool_number=%d\n", mpp_data.pool_num); | |
293 | ||
294 | seq_printf(m, "entitled_memory_weight=%d\n", mpp_data.mem_weight); | |
295 | seq_printf(m, "unallocated_entitled_memory_weight=%d\n", | |
296 | mpp_data.unallocated_mem_weight); | |
297 | seq_printf(m, "unallocated_io_mapping_entitlement=%ld\n", | |
298 | mpp_data.unallocated_entitlement); | |
299 | ||
300 | if (mpp_data.pool_size != -1) | |
301 | seq_printf(m, "entitled_memory_pool_size=%ld bytes\n", | |
302 | mpp_data.pool_size); | |
303 | ||
304 | seq_printf(m, "entitled_memory_loan_request=%ld\n", | |
305 | mpp_data.loan_request); | |
306 | ||
307 | seq_printf(m, "backing_memory=%ld bytes\n", mpp_data.backing_mem); | |
308 | } | |
309 | ||
1da177e4 LT |
310 | #define SPLPAR_CHARACTERISTICS_TOKEN 20 |
311 | #define SPLPAR_MAXLENGTH 1026*(sizeof(char)) | |
312 | ||
313 | /* | |
314 | * parse_system_parameter_string() | |
315 | * Retrieve the potential_processors, max_entitled_capacity and friends | |
316 | * through the get-system-parameter rtas call. Replace keyword strings as | |
317 | * necessary. | |
318 | */ | |
319 | static void parse_system_parameter_string(struct seq_file *m) | |
320 | { | |
321 | int call_status; | |
322 | ||
34422fed | 323 | unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL); |
1da177e4 LT |
324 | if (!local_buffer) { |
325 | printk(KERN_ERR "%s %s kmalloc failure at line %d \n", | |
e48b1b45 | 326 | __FILE__, __func__, __LINE__); |
1da177e4 LT |
327 | return; |
328 | } | |
329 | ||
330 | spin_lock(&rtas_data_buf_lock); | |
331 | memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH); | |
332 | call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1, | |
333 | NULL, | |
334 | SPLPAR_CHARACTERISTICS_TOKEN, | |
34422fed WS |
335 | __pa(rtas_data_buf), |
336 | RTAS_DATA_BUF_SIZE); | |
1da177e4 LT |
337 | memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH); |
338 | spin_unlock(&rtas_data_buf_lock); | |
339 | ||
340 | if (call_status != 0) { | |
341 | printk(KERN_INFO | |
342 | "%s %s Error calling get-system-parameter (0x%x)\n", | |
e48b1b45 | 343 | __FILE__, __func__, call_status); |
1da177e4 LT |
344 | } else { |
345 | int splpar_strlen; | |
346 | int idx, w_idx; | |
dd00cc48 | 347 | char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL); |
1da177e4 LT |
348 | if (!workbuffer) { |
349 | printk(KERN_ERR "%s %s kmalloc failure at line %d \n", | |
e48b1b45 | 350 | __FILE__, __func__, __LINE__); |
d3d2176a | 351 | kfree(local_buffer); |
1da177e4 LT |
352 | return; |
353 | } | |
354 | #ifdef LPARCFG_DEBUG | |
355 | printk(KERN_INFO "success calling get-system-parameter \n"); | |
356 | #endif | |
34422fed | 357 | splpar_strlen = local_buffer[0] * 256 + local_buffer[1]; |
1da177e4 LT |
358 | local_buffer += 2; /* step over strlen value */ |
359 | ||
1da177e4 LT |
360 | w_idx = 0; |
361 | idx = 0; | |
362 | while ((*local_buffer) && (idx < splpar_strlen)) { | |
363 | workbuffer[w_idx++] = local_buffer[idx++]; | |
364 | if ((local_buffer[idx] == ',') | |
365 | || (local_buffer[idx] == '\0')) { | |
366 | workbuffer[w_idx] = '\0'; | |
367 | if (w_idx) { | |
368 | /* avoid the empty string */ | |
369 | seq_printf(m, "%s\n", workbuffer); | |
370 | } | |
371 | memset(workbuffer, 0, SPLPAR_MAXLENGTH); | |
372 | idx++; /* skip the comma */ | |
373 | w_idx = 0; | |
374 | } else if (local_buffer[idx] == '=') { | |
375 | /* code here to replace workbuffer contents | |
376 | with different keyword strings */ | |
377 | if (0 == strcmp(workbuffer, "MaxEntCap")) { | |
378 | strcpy(workbuffer, | |
379 | "partition_max_entitled_capacity"); | |
380 | w_idx = strlen(workbuffer); | |
381 | } | |
382 | if (0 == strcmp(workbuffer, "MaxPlatProcs")) { | |
383 | strcpy(workbuffer, | |
384 | "system_potential_processors"); | |
385 | w_idx = strlen(workbuffer); | |
386 | } | |
387 | } | |
388 | } | |
389 | kfree(workbuffer); | |
390 | local_buffer -= 2; /* back up over strlen value */ | |
391 | } | |
392 | kfree(local_buffer); | |
393 | } | |
394 | ||
1da177e4 LT |
395 | /* Return the number of processors in the system. |
396 | * This function reads through the device tree and counts | |
397 | * the virtual processors, this does not include threads. | |
398 | */ | |
399 | static int lparcfg_count_active_processors(void) | |
400 | { | |
401 | struct device_node *cpus_dn = NULL; | |
402 | int count = 0; | |
403 | ||
404 | while ((cpus_dn = of_find_node_by_type(cpus_dn, "cpu"))) { | |
405 | #ifdef LPARCFG_DEBUG | |
406 | printk(KERN_ERR "cpus_dn %p \n", cpus_dn); | |
407 | #endif | |
408 | count++; | |
409 | } | |
410 | return count; | |
411 | } | |
412 | ||
ffa5abbd BK |
413 | static void pseries_cmo_data(struct seq_file *m) |
414 | { | |
415 | int cpu; | |
416 | unsigned long cmo_faults = 0; | |
417 | unsigned long cmo_fault_time = 0; | |
418 | ||
ac22429d RJ |
419 | seq_printf(m, "cmo_enabled=%d\n", firmware_has_feature(FW_FEATURE_CMO)); |
420 | ||
ffa5abbd BK |
421 | if (!firmware_has_feature(FW_FEATURE_CMO)) |
422 | return; | |
423 | ||
424 | for_each_possible_cpu(cpu) { | |
425 | cmo_faults += lppaca[cpu].cmo_faults; | |
426 | cmo_fault_time += lppaca[cpu].cmo_fault_time; | |
427 | } | |
428 | ||
429 | seq_printf(m, "cmo_faults=%lu\n", cmo_faults); | |
430 | seq_printf(m, "cmo_fault_time_usec=%lu\n", | |
431 | cmo_fault_time / tb_ticks_per_usec); | |
ac22429d RJ |
432 | seq_printf(m, "cmo_primary_psp=%d\n", cmo_get_primary_psp()); |
433 | seq_printf(m, "cmo_secondary_psp=%d\n", cmo_get_secondary_psp()); | |
434 | seq_printf(m, "cmo_page_size=%lu\n", cmo_get_page_size()); | |
ffa5abbd BK |
435 | } |
436 | ||
16e9f994 | 437 | static int pseries_lparcfg_data(struct seq_file *m, void *v) |
1da177e4 LT |
438 | { |
439 | int partition_potential_processors; | |
440 | int partition_active_processors; | |
1da177e4 | 441 | struct device_node *rtas_node; |
a7f67bdf | 442 | const int *lrdrp = NULL; |
1da177e4 | 443 | |
8c8dc322 | 444 | rtas_node = of_find_node_by_path("/rtas"); |
2b9a32ed | 445 | if (rtas_node) |
e2eb6392 | 446 | lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL); |
1da177e4 LT |
447 | |
448 | if (lrdrp == NULL) { | |
271c3f35 | 449 | partition_potential_processors = vdso_data->processorCount; |
1da177e4 LT |
450 | } else { |
451 | partition_potential_processors = *(lrdrp + 4); | |
452 | } | |
8c8dc322 | 453 | of_node_put(rtas_node); |
1da177e4 LT |
454 | |
455 | partition_active_processors = lparcfg_count_active_processors(); | |
456 | ||
1ababe11 | 457 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) { |
1da177e4 LT |
458 | /* this call handles the ibm,get-system-parameter contents */ |
459 | parse_system_parameter_string(m); | |
11529396 | 460 | parse_ppp_data(m); |
dfc3403f | 461 | parse_mpp_data(m); |
ffa5abbd | 462 | pseries_cmo_data(m); |
1da177e4 | 463 | |
11529396 | 464 | seq_printf(m, "purr=%ld\n", get_purr()); |
1da177e4 LT |
465 | } else { /* non SPLPAR case */ |
466 | ||
467 | seq_printf(m, "system_active_processors=%d\n", | |
468 | partition_potential_processors); | |
469 | ||
470 | seq_printf(m, "system_potential_processors=%d\n", | |
471 | partition_potential_processors); | |
472 | ||
473 | seq_printf(m, "partition_max_entitled_capacity=%d\n", | |
474 | partition_potential_processors * 100); | |
475 | ||
476 | seq_printf(m, "partition_entitled_capacity=%d\n", | |
477 | partition_active_processors * 100); | |
478 | } | |
479 | ||
480 | seq_printf(m, "partition_active_processors=%d\n", | |
481 | partition_active_processors); | |
482 | ||
483 | seq_printf(m, "partition_potential_processors=%d\n", | |
484 | partition_potential_processors); | |
485 | ||
3356bb9f | 486 | seq_printf(m, "shared_processor_mode=%d\n", lppaca[0].shared_proc); |
1da177e4 LT |
487 | |
488 | return 0; | |
489 | } | |
490 | ||
11529396 NF |
491 | static ssize_t update_ppp(u64 *entitlement, u8 *weight) |
492 | { | |
398778f7 RJ |
493 | struct hvcall_ppp_data ppp_data; |
494 | u8 new_weight; | |
11529396 NF |
495 | u64 new_entitled; |
496 | ssize_t retval; | |
497 | ||
498 | /* Get our current parameters */ | |
398778f7 | 499 | retval = h_get_ppp(&ppp_data); |
11529396 NF |
500 | if (retval) |
501 | return retval; | |
502 | ||
11529396 | 503 | if (entitlement) { |
398778f7 | 504 | new_weight = ppp_data.weight; |
11529396 NF |
505 | new_entitled = *entitlement; |
506 | } else if (weight) { | |
507 | new_weight = *weight; | |
398778f7 | 508 | new_entitled = ppp_data.entitlement; |
11529396 NF |
509 | } else |
510 | return -EINVAL; | |
511 | ||
512 | pr_debug("%s: current_entitled = %lu, current_weight = %u\n", | |
398778f7 | 513 | __FUNCTION__, ppp_data.entitlement, ppp_data.weight); |
11529396 NF |
514 | |
515 | pr_debug("%s: new_entitled = %lu, new_weight = %u\n", | |
516 | __FUNCTION__, new_entitled, new_weight); | |
517 | ||
518 | retval = plpar_hcall_norets(H_SET_PPP, new_entitled, new_weight); | |
519 | return retval; | |
520 | } | |
521 | ||
dfc3403f NF |
522 | /** |
523 | * update_mpp | |
524 | * | |
525 | * Update the memory entitlement and weight for the partition. Caller must | |
526 | * specify either a new entitlement or weight, not both, to be updated | |
527 | * since the h_set_mpp call takes both entitlement and weight as parameters. | |
528 | */ | |
529 | static ssize_t update_mpp(u64 *entitlement, u8 *weight) | |
530 | { | |
531 | struct hvcall_mpp_data mpp_data; | |
532 | u64 new_entitled; | |
533 | u8 new_weight; | |
534 | ssize_t rc; | |
535 | ||
22e1a4dd NF |
536 | if (entitlement) { |
537 | /* Check with vio to ensure the new memory entitlement | |
538 | * can be handled. | |
539 | */ | |
540 | rc = vio_cmo_entitlement_update(*entitlement); | |
541 | if (rc) | |
542 | return rc; | |
543 | } | |
544 | ||
dfc3403f NF |
545 | rc = h_get_mpp(&mpp_data); |
546 | if (rc) | |
547 | return rc; | |
548 | ||
549 | if (entitlement) { | |
550 | new_weight = mpp_data.mem_weight; | |
551 | new_entitled = *entitlement; | |
552 | } else if (weight) { | |
553 | new_weight = *weight; | |
554 | new_entitled = mpp_data.entitled_mem; | |
555 | } else | |
556 | return -EINVAL; | |
557 | ||
558 | pr_debug("%s: current_entitled = %lu, current_weight = %u\n", | |
559 | __FUNCTION__, mpp_data.entitled_mem, mpp_data.mem_weight); | |
560 | ||
561 | pr_debug("%s: new_entitled = %lu, new_weight = %u\n", | |
562 | __FUNCTION__, new_entitled, new_weight); | |
563 | ||
564 | rc = plpar_hcall_norets(H_SET_MPP, new_entitled, new_weight); | |
565 | return rc; | |
566 | } | |
567 | ||
1da177e4 LT |
568 | /* |
569 | * Interface for changing system parameters (variable capacity weight | |
570 | * and entitled capacity). Format of input is "param_name=value"; | |
571 | * anything after value is ignored. Valid parameters at this time are | |
572 | * "partition_entitled_capacity" and "capacity_weight". We use | |
573 | * H_SET_PPP to alter parameters. | |
574 | * | |
575 | * This function should be invoked only on systems with | |
576 | * FW_FEATURE_SPLPAR. | |
577 | */ | |
578 | static ssize_t lparcfg_write(struct file *file, const char __user * buf, | |
579 | size_t count, loff_t * off) | |
580 | { | |
16c14b46 NF |
581 | int kbuf_sz = 64; |
582 | char kbuf[kbuf_sz]; | |
1da177e4 LT |
583 | char *tmp; |
584 | u64 new_entitled, *new_entitled_ptr = &new_entitled; | |
585 | u8 new_weight, *new_weight_ptr = &new_weight; | |
16c14b46 | 586 | ssize_t retval; |
1da177e4 | 587 | |
0524aad7 SR |
588 | if (!firmware_has_feature(FW_FEATURE_SPLPAR) || |
589 | firmware_has_feature(FW_FEATURE_ISERIES)) | |
590 | return -EINVAL; | |
591 | ||
16c14b46 NF |
592 | if (count > kbuf_sz) |
593 | return -EINVAL; | |
1da177e4 | 594 | |
1da177e4 | 595 | if (copy_from_user(kbuf, buf, count)) |
16c14b46 | 596 | return -EFAULT; |
1da177e4 | 597 | |
1da177e4 LT |
598 | kbuf[count - 1] = '\0'; |
599 | tmp = strchr(kbuf, '='); | |
600 | if (!tmp) | |
16c14b46 | 601 | return -EINVAL; |
1da177e4 LT |
602 | |
603 | *tmp++ = '\0'; | |
604 | ||
605 | if (!strcmp(kbuf, "partition_entitled_capacity")) { | |
606 | char *endp; | |
607 | *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10); | |
608 | if (endp == tmp) | |
16c14b46 | 609 | return -EINVAL; |
11529396 NF |
610 | |
611 | retval = update_ppp(new_entitled_ptr, NULL); | |
1da177e4 LT |
612 | } else if (!strcmp(kbuf, "capacity_weight")) { |
613 | char *endp; | |
614 | *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10); | |
615 | if (endp == tmp) | |
16c14b46 | 616 | return -EINVAL; |
1da177e4 | 617 | |
11529396 | 618 | retval = update_ppp(NULL, new_weight_ptr); |
dfc3403f NF |
619 | } else if (!strcmp(kbuf, "entitled_memory")) { |
620 | char *endp; | |
621 | *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10); | |
622 | if (endp == tmp) | |
16c14b46 | 623 | return -EINVAL; |
dfc3403f NF |
624 | |
625 | retval = update_mpp(new_entitled_ptr, NULL); | |
626 | } else if (!strcmp(kbuf, "entitled_memory_weight")) { | |
627 | char *endp; | |
628 | *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10); | |
629 | if (endp == tmp) | |
16c14b46 | 630 | return -EINVAL; |
dfc3403f NF |
631 | |
632 | retval = update_mpp(NULL, new_weight_ptr); | |
11529396 | 633 | } else |
16c14b46 | 634 | return -EINVAL; |
1da177e4 | 635 | |
706c8c93 | 636 | if (retval == H_SUCCESS || retval == H_CONSTRAINED) { |
1da177e4 | 637 | retval = count; |
706c8c93 | 638 | } else if (retval == H_BUSY) { |
1da177e4 | 639 | retval = -EBUSY; |
706c8c93 | 640 | } else if (retval == H_HARDWARE) { |
1da177e4 | 641 | retval = -EIO; |
706c8c93 | 642 | } else if (retval == H_PARAMETER) { |
1da177e4 | 643 | retval = -EINVAL; |
1da177e4 LT |
644 | } |
645 | ||
1da177e4 LT |
646 | return retval; |
647 | } | |
648 | ||
16e9f994 SR |
649 | #else /* CONFIG_PPC_PSERIES */ |
650 | ||
651 | static int pseries_lparcfg_data(struct seq_file *m, void *v) | |
652 | { | |
653 | return 0; | |
654 | } | |
655 | ||
656 | static ssize_t lparcfg_write(struct file *file, const char __user * buf, | |
657 | size_t count, loff_t * off) | |
658 | { | |
0524aad7 | 659 | return -EINVAL; |
16e9f994 SR |
660 | } |
661 | ||
1da177e4 LT |
662 | #endif /* CONFIG_PPC_PSERIES */ |
663 | ||
16e9f994 SR |
664 | static int lparcfg_data(struct seq_file *m, void *v) |
665 | { | |
666 | struct device_node *rootdn; | |
667 | const char *model = ""; | |
668 | const char *system_id = ""; | |
669 | const char *tmp; | |
a7f67bdf JK |
670 | const unsigned int *lp_index_ptr; |
671 | unsigned int lp_index = 0; | |
16e9f994 SR |
672 | |
673 | seq_printf(m, "%s %s \n", MODULE_NAME, MODULE_VERS); | |
674 | ||
8c8dc322 | 675 | rootdn = of_find_node_by_path("/"); |
16e9f994 | 676 | if (rootdn) { |
e2eb6392 | 677 | tmp = of_get_property(rootdn, "model", NULL); |
16e9f994 SR |
678 | if (tmp) { |
679 | model = tmp; | |
680 | /* Skip "IBM," - see platforms/iseries/dt.c */ | |
681 | if (firmware_has_feature(FW_FEATURE_ISERIES)) | |
682 | model += 4; | |
683 | } | |
e2eb6392 | 684 | tmp = of_get_property(rootdn, "system-id", NULL); |
16e9f994 SR |
685 | if (tmp) { |
686 | system_id = tmp; | |
687 | /* Skip "IBM," - see platforms/iseries/dt.c */ | |
688 | if (firmware_has_feature(FW_FEATURE_ISERIES)) | |
689 | system_id += 4; | |
690 | } | |
e2eb6392 SR |
691 | lp_index_ptr = of_get_property(rootdn, "ibm,partition-no", |
692 | NULL); | |
16e9f994 SR |
693 | if (lp_index_ptr) |
694 | lp_index = *lp_index_ptr; | |
8c8dc322 | 695 | of_node_put(rootdn); |
16e9f994 SR |
696 | } |
697 | seq_printf(m, "serial_number=%s\n", system_id); | |
698 | seq_printf(m, "system_type=%s\n", model); | |
699 | seq_printf(m, "partition_id=%d\n", (int)lp_index); | |
700 | ||
701 | if (firmware_has_feature(FW_FEATURE_ISERIES)) | |
702 | return iseries_lparcfg_data(m, v); | |
703 | return pseries_lparcfg_data(m, v); | |
704 | } | |
705 | ||
1da177e4 LT |
706 | static int lparcfg_open(struct inode *inode, struct file *file) |
707 | { | |
708 | return single_open(file, lparcfg_data, NULL); | |
709 | } | |
710 | ||
1c21a293 | 711 | static const struct file_operations lparcfg_fops = { |
8acb888c AB |
712 | .owner = THIS_MODULE, |
713 | .read = seq_read, | |
0524aad7 | 714 | .write = lparcfg_write, |
8acb888c AB |
715 | .open = lparcfg_open, |
716 | .release = single_release, | |
1da177e4 LT |
717 | }; |
718 | ||
1c21a293 | 719 | static int __init lparcfg_init(void) |
1da177e4 LT |
720 | { |
721 | struct proc_dir_entry *ent; | |
71839267 | 722 | mode_t mode = S_IRUSR | S_IRGRP | S_IROTH; |
1da177e4 LT |
723 | |
724 | /* Allow writing if we have FW_FEATURE_SPLPAR */ | |
16e9f994 | 725 | if (firmware_has_feature(FW_FEATURE_SPLPAR) && |
0524aad7 | 726 | !firmware_has_feature(FW_FEATURE_ISERIES)) |
1da177e4 | 727 | mode |= S_IWUSR; |
1da177e4 | 728 | |
66747138 DL |
729 | ent = proc_create("ppc64/lparcfg", mode, NULL, &lparcfg_fops); |
730 | if (!ent) { | |
1da177e4 LT |
731 | printk(KERN_ERR "Failed to create ppc64/lparcfg\n"); |
732 | return -EIO; | |
733 | } | |
734 | ||
735 | proc_ppc64_lparcfg = ent; | |
736 | return 0; | |
737 | } | |
738 | ||
1c21a293 | 739 | static void __exit lparcfg_cleanup(void) |
1da177e4 | 740 | { |
0d9dc4b4 | 741 | if (proc_ppc64_lparcfg) |
1da177e4 | 742 | remove_proc_entry("lparcfg", proc_ppc64_lparcfg->parent); |
1da177e4 LT |
743 | } |
744 | ||
745 | module_init(lparcfg_init); | |
746 | module_exit(lparcfg_cleanup); | |
747 | MODULE_DESCRIPTION("Interface for LPAR configuration data"); | |
748 | MODULE_AUTHOR("Dave Engebretsen"); | |
749 | MODULE_LICENSE("GPL"); |