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 | ||
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> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
1da177e4 | 28 | #include <asm/uaccess.h> |
1da177e4 | 29 | #include <asm/lppaca.h> |
1da177e4 | 30 | #include <asm/hvcall.h> |
1ababe11 | 31 | #include <asm/firmware.h> |
1da177e4 | 32 | #include <asm/rtas.h> |
1da177e4 | 33 | #include <asm/time.h> |
856509d5 | 34 | #include <asm/prom.h> |
271c3f35 | 35 | #include <asm/vdso_datapage.h> |
22e1a4dd | 36 | #include <asm/vio.h> |
46db2f86 | 37 | #include <asm/mmu.h> |
1da177e4 | 38 | |
6fe9d1fa | 39 | #define MODULE_VERS "1.9" |
1da177e4 LT |
40 | #define MODULE_NAME "lparcfg" |
41 | ||
42 | /* #define LPARCFG_DEBUG */ | |
43 | ||
1da177e4 | 44 | /* |
16e9f994 SR |
45 | * Track sum of all purrs across all processors. This is used to further |
46 | * calculate usage values by different applications | |
1da177e4 LT |
47 | */ |
48 | static unsigned long get_purr(void) | |
49 | { | |
50 | unsigned long sum_purr = 0; | |
51 | int cpu; | |
1da177e4 | 52 | |
0e551954 | 53 | for_each_possible_cpu(cpu) { |
f5339277 | 54 | struct cpu_usage *cu; |
1da177e4 | 55 | |
f5339277 SR |
56 | cu = &per_cpu(cpu_usage_array, cpu); |
57 | sum_purr += cu->current_tb; | |
1da177e4 LT |
58 | } |
59 | return sum_purr; | |
60 | } | |
61 | ||
d3d2176a | 62 | /* |
1da177e4 LT |
63 | * Methods used to fetch LPAR data when running on a pSeries platform. |
64 | */ | |
dfc3403f | 65 | |
398778f7 RJ |
66 | struct hvcall_ppp_data { |
67 | u64 entitlement; | |
68 | u64 unallocated_entitlement; | |
69 | u16 group_num; | |
70 | u16 pool_num; | |
71 | u8 capped; | |
72 | u8 weight; | |
73 | u8 unallocated_weight; | |
74 | u16 active_procs_in_pool; | |
75 | u16 active_system_procs; | |
f03cdb3a NF |
76 | u16 phys_platform_procs; |
77 | u32 max_proc_cap_avail; | |
78 | u32 entitled_proc_cap_avail; | |
398778f7 RJ |
79 | }; |
80 | ||
1da177e4 LT |
81 | /* |
82 | * H_GET_PPP hcall returns info in 4 parms. | |
83 | * entitled_capacity,unallocated_capacity, | |
84 | * aggregation, resource_capability). | |
85 | * | |
d3d2176a | 86 | * R4 = Entitled Processor Capacity Percentage. |
1da177e4 LT |
87 | * R5 = Unallocated Processor Capacity Percentage. |
88 | * R6 (AABBCCDDEEFFGGHH). | |
89 | * XXXX - reserved (0) | |
90 | * XXXX - reserved (0) | |
91 | * XXXX - Group Number | |
92 | * XXXX - Pool Number. | |
93 | * R7 (IIJJKKLLMMNNOOPP). | |
94 | * XX - reserved. (0) | |
95 | * XX - bit 0-6 reserved (0). bit 7 is Capped indicator. | |
96 | * XX - variable processor Capacity Weight | |
97 | * XX - Unallocated Variable Processor Capacity Weight. | |
98 | * XXXX - Active processors in Physical Processor Pool. | |
d3d2176a | 99 | * XXXX - Processors active on platform. |
f03cdb3a NF |
100 | * R8 (QQQQRRRRRRSSSSSS). if ibm,partition-performance-parameters-level >= 1 |
101 | * XXXX - Physical platform procs allocated to virtualization. | |
102 | * XXXXXX - Max procs capacity % available to the partitions pool. | |
103 | * XXXXXX - Entitled procs capacity % available to the | |
104 | * partitions pool. | |
1da177e4 | 105 | */ |
398778f7 | 106 | static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data) |
1da177e4 LT |
107 | { |
108 | unsigned long rc; | |
f03cdb3a | 109 | unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; |
b9377ffc | 110 | |
f03cdb3a | 111 | rc = plpar_hcall9(H_GET_PPP, retbuf); |
b9377ffc | 112 | |
398778f7 RJ |
113 | ppp_data->entitlement = retbuf[0]; |
114 | ppp_data->unallocated_entitlement = retbuf[1]; | |
115 | ||
116 | ppp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff; | |
117 | ppp_data->pool_num = retbuf[2] & 0xffff; | |
118 | ||
119 | ppp_data->capped = (retbuf[3] >> 6 * 8) & 0x01; | |
120 | ppp_data->weight = (retbuf[3] >> 5 * 8) & 0xff; | |
121 | ppp_data->unallocated_weight = (retbuf[3] >> 4 * 8) & 0xff; | |
122 | ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff; | |
123 | ppp_data->active_system_procs = retbuf[3] & 0xffff; | |
1da177e4 | 124 | |
f03cdb3a NF |
125 | ppp_data->phys_platform_procs = retbuf[4] >> 6 * 8; |
126 | ppp_data->max_proc_cap_avail = (retbuf[4] >> 3 * 8) & 0xffffff; | |
127 | ppp_data->entitled_proc_cap_avail = retbuf[4] & 0xffffff; | |
128 | ||
1da177e4 LT |
129 | return rc; |
130 | } | |
131 | ||
11529396 NF |
132 | static unsigned h_pic(unsigned long *pool_idle_time, |
133 | unsigned long *num_procs) | |
1da177e4 LT |
134 | { |
135 | unsigned long rc; | |
b9377ffc AB |
136 | unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; |
137 | ||
138 | rc = plpar_hcall(H_PIC, retbuf); | |
139 | ||
140 | *pool_idle_time = retbuf[0]; | |
141 | *num_procs = retbuf[1]; | |
11529396 NF |
142 | |
143 | return rc; | |
144 | } | |
145 | ||
146 | /* | |
147 | * parse_ppp_data | |
148 | * Parse out the data returned from h_get_ppp and h_pic | |
149 | */ | |
150 | static void parse_ppp_data(struct seq_file *m) | |
151 | { | |
398778f7 | 152 | struct hvcall_ppp_data ppp_data; |
f03cdb3a NF |
153 | struct device_node *root; |
154 | const int *perf_level; | |
11529396 NF |
155 | int rc; |
156 | ||
398778f7 | 157 | rc = h_get_ppp(&ppp_data); |
11529396 NF |
158 | if (rc) |
159 | return; | |
160 | ||
fe333321 | 161 | seq_printf(m, "partition_entitled_capacity=%lld\n", |
398778f7 RJ |
162 | ppp_data.entitlement); |
163 | seq_printf(m, "group=%d\n", ppp_data.group_num); | |
164 | seq_printf(m, "system_active_processors=%d\n", | |
165 | ppp_data.active_system_procs); | |
11529396 | 166 | |
25985edc | 167 | /* pool related entries are appropriate for shared configs */ |
8154c5d2 | 168 | if (lppaca_of(0).shared_proc) { |
11529396 NF |
169 | unsigned long pool_idle_time, pool_procs; |
170 | ||
398778f7 | 171 | seq_printf(m, "pool=%d\n", ppp_data.pool_num); |
11529396 NF |
172 | |
173 | /* report pool_capacity in percentage */ | |
398778f7 RJ |
174 | seq_printf(m, "pool_capacity=%d\n", |
175 | ppp_data.active_procs_in_pool * 100); | |
11529396 NF |
176 | |
177 | h_pic(&pool_idle_time, &pool_procs); | |
178 | seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time); | |
179 | seq_printf(m, "pool_num_procs=%ld\n", pool_procs); | |
180 | } | |
181 | ||
398778f7 RJ |
182 | seq_printf(m, "unallocated_capacity_weight=%d\n", |
183 | ppp_data.unallocated_weight); | |
184 | seq_printf(m, "capacity_weight=%d\n", ppp_data.weight); | |
185 | seq_printf(m, "capped=%d\n", ppp_data.capped); | |
fe333321 | 186 | seq_printf(m, "unallocated_capacity=%lld\n", |
398778f7 | 187 | ppp_data.unallocated_entitlement); |
f03cdb3a NF |
188 | |
189 | /* The last bits of information returned from h_get_ppp are only | |
190 | * valid if the ibm,partition-performance-parameters-level | |
191 | * property is >= 1. | |
192 | */ | |
193 | root = of_find_node_by_path("/"); | |
194 | if (root) { | |
195 | perf_level = of_get_property(root, | |
196 | "ibm,partition-performance-parameters-level", | |
197 | NULL); | |
198 | if (perf_level && (*perf_level >= 1)) { | |
199 | seq_printf(m, | |
200 | "physical_procs_allocated_to_virtualization=%d\n", | |
201 | ppp_data.phys_platform_procs); | |
202 | seq_printf(m, "max_proc_capacity_available=%d\n", | |
203 | ppp_data.max_proc_cap_avail); | |
204 | seq_printf(m, "entitled_proc_capacity_available=%d\n", | |
205 | ppp_data.entitled_proc_cap_avail); | |
206 | } | |
207 | ||
208 | of_node_put(root); | |
209 | } | |
1da177e4 LT |
210 | } |
211 | ||
dfc3403f NF |
212 | /** |
213 | * parse_mpp_data | |
214 | * Parse out data returned from h_get_mpp | |
215 | */ | |
216 | static void parse_mpp_data(struct seq_file *m) | |
217 | { | |
218 | struct hvcall_mpp_data mpp_data; | |
219 | int rc; | |
220 | ||
221 | rc = h_get_mpp(&mpp_data); | |
222 | if (rc) | |
223 | return; | |
224 | ||
225 | seq_printf(m, "entitled_memory=%ld\n", mpp_data.entitled_mem); | |
226 | ||
227 | if (mpp_data.mapped_mem != -1) | |
228 | seq_printf(m, "mapped_entitled_memory=%ld\n", | |
229 | mpp_data.mapped_mem); | |
230 | ||
231 | seq_printf(m, "entitled_memory_group_number=%d\n", mpp_data.group_num); | |
232 | seq_printf(m, "entitled_memory_pool_number=%d\n", mpp_data.pool_num); | |
233 | ||
234 | seq_printf(m, "entitled_memory_weight=%d\n", mpp_data.mem_weight); | |
235 | seq_printf(m, "unallocated_entitled_memory_weight=%d\n", | |
236 | mpp_data.unallocated_mem_weight); | |
237 | seq_printf(m, "unallocated_io_mapping_entitlement=%ld\n", | |
238 | mpp_data.unallocated_entitlement); | |
239 | ||
240 | if (mpp_data.pool_size != -1) | |
241 | seq_printf(m, "entitled_memory_pool_size=%ld bytes\n", | |
242 | mpp_data.pool_size); | |
243 | ||
244 | seq_printf(m, "entitled_memory_loan_request=%ld\n", | |
245 | mpp_data.loan_request); | |
246 | ||
247 | seq_printf(m, "backing_memory=%ld bytes\n", mpp_data.backing_mem); | |
248 | } | |
249 | ||
9ee820fa BK |
250 | /** |
251 | * parse_mpp_x_data | |
252 | * Parse out data returned from h_get_mpp_x | |
253 | */ | |
254 | static void parse_mpp_x_data(struct seq_file *m) | |
255 | { | |
256 | struct hvcall_mpp_x_data mpp_x_data; | |
257 | ||
258 | if (!firmware_has_feature(FW_FEATURE_XCMO)) | |
259 | return; | |
260 | if (h_get_mpp_x(&mpp_x_data)) | |
261 | return; | |
262 | ||
263 | seq_printf(m, "coalesced_bytes=%ld\n", mpp_x_data.coalesced_bytes); | |
264 | ||
265 | if (mpp_x_data.pool_coalesced_bytes) | |
266 | seq_printf(m, "pool_coalesced_bytes=%ld\n", | |
267 | mpp_x_data.pool_coalesced_bytes); | |
268 | if (mpp_x_data.pool_purr_cycles) | |
269 | seq_printf(m, "coalesce_pool_purr=%ld\n", mpp_x_data.pool_purr_cycles); | |
270 | if (mpp_x_data.pool_spurr_cycles) | |
271 | seq_printf(m, "coalesce_pool_spurr=%ld\n", mpp_x_data.pool_spurr_cycles); | |
272 | } | |
273 | ||
1da177e4 LT |
274 | #define SPLPAR_CHARACTERISTICS_TOKEN 20 |
275 | #define SPLPAR_MAXLENGTH 1026*(sizeof(char)) | |
276 | ||
277 | /* | |
278 | * parse_system_parameter_string() | |
279 | * Retrieve the potential_processors, max_entitled_capacity and friends | |
280 | * through the get-system-parameter rtas call. Replace keyword strings as | |
281 | * necessary. | |
282 | */ | |
283 | static void parse_system_parameter_string(struct seq_file *m) | |
284 | { | |
285 | int call_status; | |
286 | ||
34422fed | 287 | unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL); |
1da177e4 | 288 | if (!local_buffer) { |
8354be9c | 289 | printk(KERN_ERR "%s %s kmalloc failure at line %d\n", |
e48b1b45 | 290 | __FILE__, __func__, __LINE__); |
1da177e4 LT |
291 | return; |
292 | } | |
293 | ||
294 | spin_lock(&rtas_data_buf_lock); | |
295 | memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH); | |
296 | call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1, | |
297 | NULL, | |
298 | SPLPAR_CHARACTERISTICS_TOKEN, | |
34422fed WS |
299 | __pa(rtas_data_buf), |
300 | RTAS_DATA_BUF_SIZE); | |
1da177e4 | 301 | memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH); |
5676005a | 302 | local_buffer[SPLPAR_MAXLENGTH - 1] = '\0'; |
1da177e4 LT |
303 | spin_unlock(&rtas_data_buf_lock); |
304 | ||
305 | if (call_status != 0) { | |
306 | printk(KERN_INFO | |
307 | "%s %s Error calling get-system-parameter (0x%x)\n", | |
e48b1b45 | 308 | __FILE__, __func__, call_status); |
1da177e4 LT |
309 | } else { |
310 | int splpar_strlen; | |
311 | int idx, w_idx; | |
dd00cc48 | 312 | char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL); |
1da177e4 | 313 | if (!workbuffer) { |
8354be9c | 314 | printk(KERN_ERR "%s %s kmalloc failure at line %d\n", |
e48b1b45 | 315 | __FILE__, __func__, __LINE__); |
d3d2176a | 316 | kfree(local_buffer); |
1da177e4 LT |
317 | return; |
318 | } | |
319 | #ifdef LPARCFG_DEBUG | |
8354be9c | 320 | printk(KERN_INFO "success calling get-system-parameter\n"); |
1da177e4 | 321 | #endif |
34422fed | 322 | splpar_strlen = local_buffer[0] * 256 + local_buffer[1]; |
1da177e4 LT |
323 | local_buffer += 2; /* step over strlen value */ |
324 | ||
1da177e4 LT |
325 | w_idx = 0; |
326 | idx = 0; | |
327 | while ((*local_buffer) && (idx < splpar_strlen)) { | |
328 | workbuffer[w_idx++] = local_buffer[idx++]; | |
329 | if ((local_buffer[idx] == ',') | |
330 | || (local_buffer[idx] == '\0')) { | |
331 | workbuffer[w_idx] = '\0'; | |
332 | if (w_idx) { | |
333 | /* avoid the empty string */ | |
334 | seq_printf(m, "%s\n", workbuffer); | |
335 | } | |
336 | memset(workbuffer, 0, SPLPAR_MAXLENGTH); | |
337 | idx++; /* skip the comma */ | |
338 | w_idx = 0; | |
339 | } else if (local_buffer[idx] == '=') { | |
340 | /* code here to replace workbuffer contents | |
341 | with different keyword strings */ | |
342 | if (0 == strcmp(workbuffer, "MaxEntCap")) { | |
343 | strcpy(workbuffer, | |
344 | "partition_max_entitled_capacity"); | |
345 | w_idx = strlen(workbuffer); | |
346 | } | |
347 | if (0 == strcmp(workbuffer, "MaxPlatProcs")) { | |
348 | strcpy(workbuffer, | |
349 | "system_potential_processors"); | |
350 | w_idx = strlen(workbuffer); | |
351 | } | |
352 | } | |
353 | } | |
354 | kfree(workbuffer); | |
355 | local_buffer -= 2; /* back up over strlen value */ | |
356 | } | |
357 | kfree(local_buffer); | |
358 | } | |
359 | ||
1da177e4 LT |
360 | /* Return the number of processors in the system. |
361 | * This function reads through the device tree and counts | |
362 | * the virtual processors, this does not include threads. | |
363 | */ | |
364 | static int lparcfg_count_active_processors(void) | |
365 | { | |
366 | struct device_node *cpus_dn = NULL; | |
367 | int count = 0; | |
368 | ||
369 | while ((cpus_dn = of_find_node_by_type(cpus_dn, "cpu"))) { | |
370 | #ifdef LPARCFG_DEBUG | |
8354be9c | 371 | printk(KERN_ERR "cpus_dn %p\n", cpus_dn); |
1da177e4 LT |
372 | #endif |
373 | count++; | |
374 | } | |
375 | return count; | |
376 | } | |
377 | ||
ffa5abbd BK |
378 | static void pseries_cmo_data(struct seq_file *m) |
379 | { | |
380 | int cpu; | |
381 | unsigned long cmo_faults = 0; | |
382 | unsigned long cmo_fault_time = 0; | |
383 | ||
ac22429d RJ |
384 | seq_printf(m, "cmo_enabled=%d\n", firmware_has_feature(FW_FEATURE_CMO)); |
385 | ||
ffa5abbd BK |
386 | if (!firmware_has_feature(FW_FEATURE_CMO)) |
387 | return; | |
388 | ||
389 | for_each_possible_cpu(cpu) { | |
8154c5d2 PM |
390 | cmo_faults += lppaca_of(cpu).cmo_faults; |
391 | cmo_fault_time += lppaca_of(cpu).cmo_fault_time; | |
ffa5abbd BK |
392 | } |
393 | ||
394 | seq_printf(m, "cmo_faults=%lu\n", cmo_faults); | |
395 | seq_printf(m, "cmo_fault_time_usec=%lu\n", | |
396 | cmo_fault_time / tb_ticks_per_usec); | |
ac22429d RJ |
397 | seq_printf(m, "cmo_primary_psp=%d\n", cmo_get_primary_psp()); |
398 | seq_printf(m, "cmo_secondary_psp=%d\n", cmo_get_secondary_psp()); | |
399 | seq_printf(m, "cmo_page_size=%lu\n", cmo_get_page_size()); | |
ffa5abbd BK |
400 | } |
401 | ||
0559f0a7 AB |
402 | static void splpar_dispatch_data(struct seq_file *m) |
403 | { | |
404 | int cpu; | |
405 | unsigned long dispatches = 0; | |
406 | unsigned long dispatch_dispersions = 0; | |
407 | ||
408 | for_each_possible_cpu(cpu) { | |
8154c5d2 PM |
409 | dispatches += lppaca_of(cpu).yield_count; |
410 | dispatch_dispersions += lppaca_of(cpu).dispersion_count; | |
0559f0a7 AB |
411 | } |
412 | ||
413 | seq_printf(m, "dispatches=%lu\n", dispatches); | |
414 | seq_printf(m, "dispatch_dispersions=%lu\n", dispatch_dispersions); | |
415 | } | |
416 | ||
6fe9d1fa VS |
417 | static void parse_em_data(struct seq_file *m) |
418 | { | |
419 | unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; | |
420 | ||
421 | if (plpar_hcall(H_GET_EM_PARMS, retbuf) == H_SUCCESS) | |
422 | seq_printf(m, "power_mode_data=%016lx\n", retbuf[0]); | |
423 | } | |
424 | ||
16e9f994 | 425 | static int pseries_lparcfg_data(struct seq_file *m, void *v) |
1da177e4 LT |
426 | { |
427 | int partition_potential_processors; | |
428 | int partition_active_processors; | |
1da177e4 | 429 | struct device_node *rtas_node; |
a7f67bdf | 430 | const int *lrdrp = NULL; |
1da177e4 | 431 | |
8c8dc322 | 432 | rtas_node = of_find_node_by_path("/rtas"); |
2b9a32ed | 433 | if (rtas_node) |
e2eb6392 | 434 | lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL); |
1da177e4 LT |
435 | |
436 | if (lrdrp == NULL) { | |
271c3f35 | 437 | partition_potential_processors = vdso_data->processorCount; |
1da177e4 LT |
438 | } else { |
439 | partition_potential_processors = *(lrdrp + 4); | |
440 | } | |
8c8dc322 | 441 | of_node_put(rtas_node); |
1da177e4 LT |
442 | |
443 | partition_active_processors = lparcfg_count_active_processors(); | |
444 | ||
1ababe11 | 445 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) { |
1da177e4 LT |
446 | /* this call handles the ibm,get-system-parameter contents */ |
447 | parse_system_parameter_string(m); | |
11529396 | 448 | parse_ppp_data(m); |
dfc3403f | 449 | parse_mpp_data(m); |
9ee820fa | 450 | parse_mpp_x_data(m); |
ffa5abbd | 451 | pseries_cmo_data(m); |
0559f0a7 | 452 | splpar_dispatch_data(m); |
1da177e4 | 453 | |
11529396 | 454 | seq_printf(m, "purr=%ld\n", get_purr()); |
1da177e4 LT |
455 | } else { /* non SPLPAR case */ |
456 | ||
457 | seq_printf(m, "system_active_processors=%d\n", | |
458 | partition_potential_processors); | |
459 | ||
460 | seq_printf(m, "system_potential_processors=%d\n", | |
461 | partition_potential_processors); | |
462 | ||
463 | seq_printf(m, "partition_max_entitled_capacity=%d\n", | |
464 | partition_potential_processors * 100); | |
465 | ||
466 | seq_printf(m, "partition_entitled_capacity=%d\n", | |
467 | partition_active_processors * 100); | |
468 | } | |
469 | ||
470 | seq_printf(m, "partition_active_processors=%d\n", | |
471 | partition_active_processors); | |
472 | ||
473 | seq_printf(m, "partition_potential_processors=%d\n", | |
474 | partition_potential_processors); | |
475 | ||
8154c5d2 | 476 | seq_printf(m, "shared_processor_mode=%d\n", lppaca_of(0).shared_proc); |
1da177e4 | 477 | |
46db2f86 BK |
478 | seq_printf(m, "slb_size=%d\n", mmu_slb_size); |
479 | ||
6fe9d1fa VS |
480 | parse_em_data(m); |
481 | ||
1da177e4 LT |
482 | return 0; |
483 | } | |
484 | ||
11529396 NF |
485 | static ssize_t update_ppp(u64 *entitlement, u8 *weight) |
486 | { | |
398778f7 RJ |
487 | struct hvcall_ppp_data ppp_data; |
488 | u8 new_weight; | |
11529396 NF |
489 | u64 new_entitled; |
490 | ssize_t retval; | |
491 | ||
492 | /* Get our current parameters */ | |
398778f7 | 493 | retval = h_get_ppp(&ppp_data); |
11529396 NF |
494 | if (retval) |
495 | return retval; | |
496 | ||
11529396 | 497 | if (entitlement) { |
398778f7 | 498 | new_weight = ppp_data.weight; |
11529396 NF |
499 | new_entitled = *entitlement; |
500 | } else if (weight) { | |
501 | new_weight = *weight; | |
398778f7 | 502 | new_entitled = ppp_data.entitlement; |
11529396 NF |
503 | } else |
504 | return -EINVAL; | |
505 | ||
fe333321 | 506 | pr_debug("%s: current_entitled = %llu, current_weight = %u\n", |
5df72bf3 | 507 | __func__, ppp_data.entitlement, ppp_data.weight); |
11529396 | 508 | |
fe333321 | 509 | pr_debug("%s: new_entitled = %llu, new_weight = %u\n", |
5df72bf3 | 510 | __func__, new_entitled, new_weight); |
11529396 NF |
511 | |
512 | retval = plpar_hcall_norets(H_SET_PPP, new_entitled, new_weight); | |
513 | return retval; | |
514 | } | |
515 | ||
dfc3403f NF |
516 | /** |
517 | * update_mpp | |
518 | * | |
519 | * Update the memory entitlement and weight for the partition. Caller must | |
520 | * specify either a new entitlement or weight, not both, to be updated | |
521 | * since the h_set_mpp call takes both entitlement and weight as parameters. | |
522 | */ | |
523 | static ssize_t update_mpp(u64 *entitlement, u8 *weight) | |
524 | { | |
525 | struct hvcall_mpp_data mpp_data; | |
526 | u64 new_entitled; | |
527 | u8 new_weight; | |
528 | ssize_t rc; | |
529 | ||
22e1a4dd NF |
530 | if (entitlement) { |
531 | /* Check with vio to ensure the new memory entitlement | |
532 | * can be handled. | |
533 | */ | |
534 | rc = vio_cmo_entitlement_update(*entitlement); | |
535 | if (rc) | |
536 | return rc; | |
537 | } | |
538 | ||
dfc3403f NF |
539 | rc = h_get_mpp(&mpp_data); |
540 | if (rc) | |
541 | return rc; | |
542 | ||
543 | if (entitlement) { | |
544 | new_weight = mpp_data.mem_weight; | |
545 | new_entitled = *entitlement; | |
546 | } else if (weight) { | |
547 | new_weight = *weight; | |
548 | new_entitled = mpp_data.entitled_mem; | |
549 | } else | |
550 | return -EINVAL; | |
551 | ||
552 | pr_debug("%s: current_entitled = %lu, current_weight = %u\n", | |
5df72bf3 | 553 | __func__, mpp_data.entitled_mem, mpp_data.mem_weight); |
dfc3403f | 554 | |
fe333321 | 555 | pr_debug("%s: new_entitled = %llu, new_weight = %u\n", |
5df72bf3 | 556 | __func__, new_entitled, new_weight); |
dfc3403f NF |
557 | |
558 | rc = plpar_hcall_norets(H_SET_MPP, new_entitled, new_weight); | |
559 | return rc; | |
560 | } | |
561 | ||
1da177e4 LT |
562 | /* |
563 | * Interface for changing system parameters (variable capacity weight | |
564 | * and entitled capacity). Format of input is "param_name=value"; | |
565 | * anything after value is ignored. Valid parameters at this time are | |
566 | * "partition_entitled_capacity" and "capacity_weight". We use | |
567 | * H_SET_PPP to alter parameters. | |
568 | * | |
569 | * This function should be invoked only on systems with | |
570 | * FW_FEATURE_SPLPAR. | |
571 | */ | |
572 | static ssize_t lparcfg_write(struct file *file, const char __user * buf, | |
573 | size_t count, loff_t * off) | |
574 | { | |
16c14b46 NF |
575 | int kbuf_sz = 64; |
576 | char kbuf[kbuf_sz]; | |
1da177e4 LT |
577 | char *tmp; |
578 | u64 new_entitled, *new_entitled_ptr = &new_entitled; | |
579 | u8 new_weight, *new_weight_ptr = &new_weight; | |
16c14b46 | 580 | ssize_t retval; |
1da177e4 | 581 | |
f5339277 | 582 | if (!firmware_has_feature(FW_FEATURE_SPLPAR)) |
0524aad7 SR |
583 | return -EINVAL; |
584 | ||
16c14b46 NF |
585 | if (count > kbuf_sz) |
586 | return -EINVAL; | |
1da177e4 | 587 | |
1da177e4 | 588 | if (copy_from_user(kbuf, buf, count)) |
16c14b46 | 589 | return -EFAULT; |
1da177e4 | 590 | |
1da177e4 LT |
591 | kbuf[count - 1] = '\0'; |
592 | tmp = strchr(kbuf, '='); | |
593 | if (!tmp) | |
16c14b46 | 594 | return -EINVAL; |
1da177e4 LT |
595 | |
596 | *tmp++ = '\0'; | |
597 | ||
598 | if (!strcmp(kbuf, "partition_entitled_capacity")) { | |
599 | char *endp; | |
600 | *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10); | |
601 | if (endp == tmp) | |
16c14b46 | 602 | return -EINVAL; |
11529396 NF |
603 | |
604 | retval = update_ppp(new_entitled_ptr, NULL); | |
1da177e4 LT |
605 | } else if (!strcmp(kbuf, "capacity_weight")) { |
606 | char *endp; | |
607 | *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10); | |
608 | if (endp == tmp) | |
16c14b46 | 609 | return -EINVAL; |
1da177e4 | 610 | |
11529396 | 611 | retval = update_ppp(NULL, new_weight_ptr); |
dfc3403f NF |
612 | } else if (!strcmp(kbuf, "entitled_memory")) { |
613 | char *endp; | |
614 | *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10); | |
615 | if (endp == tmp) | |
16c14b46 | 616 | return -EINVAL; |
dfc3403f NF |
617 | |
618 | retval = update_mpp(new_entitled_ptr, NULL); | |
619 | } else if (!strcmp(kbuf, "entitled_memory_weight")) { | |
620 | char *endp; | |
621 | *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10); | |
622 | if (endp == tmp) | |
16c14b46 | 623 | return -EINVAL; |
dfc3403f NF |
624 | |
625 | retval = update_mpp(NULL, new_weight_ptr); | |
11529396 | 626 | } else |
16c14b46 | 627 | return -EINVAL; |
1da177e4 | 628 | |
706c8c93 | 629 | if (retval == H_SUCCESS || retval == H_CONSTRAINED) { |
1da177e4 | 630 | retval = count; |
706c8c93 | 631 | } else if (retval == H_BUSY) { |
1da177e4 | 632 | retval = -EBUSY; |
706c8c93 | 633 | } else if (retval == H_HARDWARE) { |
1da177e4 | 634 | retval = -EIO; |
706c8c93 | 635 | } else if (retval == H_PARAMETER) { |
1da177e4 | 636 | retval = -EINVAL; |
1da177e4 LT |
637 | } |
638 | ||
1da177e4 LT |
639 | return retval; |
640 | } | |
641 | ||
16e9f994 SR |
642 | static int lparcfg_data(struct seq_file *m, void *v) |
643 | { | |
644 | struct device_node *rootdn; | |
645 | const char *model = ""; | |
646 | const char *system_id = ""; | |
647 | const char *tmp; | |
a7f67bdf JK |
648 | const unsigned int *lp_index_ptr; |
649 | unsigned int lp_index = 0; | |
16e9f994 | 650 | |
8354be9c | 651 | seq_printf(m, "%s %s\n", MODULE_NAME, MODULE_VERS); |
16e9f994 | 652 | |
8c8dc322 | 653 | rootdn = of_find_node_by_path("/"); |
16e9f994 | 654 | if (rootdn) { |
e2eb6392 | 655 | tmp = of_get_property(rootdn, "model", NULL); |
f5339277 | 656 | if (tmp) |
16e9f994 | 657 | model = tmp; |
e2eb6392 | 658 | tmp = of_get_property(rootdn, "system-id", NULL); |
f5339277 | 659 | if (tmp) |
16e9f994 | 660 | system_id = tmp; |
e2eb6392 SR |
661 | lp_index_ptr = of_get_property(rootdn, "ibm,partition-no", |
662 | NULL); | |
16e9f994 SR |
663 | if (lp_index_ptr) |
664 | lp_index = *lp_index_ptr; | |
8c8dc322 | 665 | of_node_put(rootdn); |
16e9f994 SR |
666 | } |
667 | seq_printf(m, "serial_number=%s\n", system_id); | |
668 | seq_printf(m, "system_type=%s\n", model); | |
669 | seq_printf(m, "partition_id=%d\n", (int)lp_index); | |
670 | ||
16e9f994 SR |
671 | return pseries_lparcfg_data(m, v); |
672 | } | |
673 | ||
1da177e4 LT |
674 | static int lparcfg_open(struct inode *inode, struct file *file) |
675 | { | |
676 | return single_open(file, lparcfg_data, NULL); | |
677 | } | |
678 | ||
1c21a293 | 679 | static const struct file_operations lparcfg_fops = { |
8acb888c AB |
680 | .owner = THIS_MODULE, |
681 | .read = seq_read, | |
0524aad7 | 682 | .write = lparcfg_write, |
8acb888c AB |
683 | .open = lparcfg_open, |
684 | .release = single_release, | |
6038f373 | 685 | .llseek = seq_lseek, |
1da177e4 LT |
686 | }; |
687 | ||
1c21a293 | 688 | static int __init lparcfg_init(void) |
1da177e4 | 689 | { |
d161a13f | 690 | umode_t mode = S_IRUSR | S_IRGRP | S_IROTH; |
1da177e4 LT |
691 | |
692 | /* Allow writing if we have FW_FEATURE_SPLPAR */ | |
f5339277 | 693 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) |
1da177e4 | 694 | mode |= S_IWUSR; |
1da177e4 | 695 | |
b177a292 | 696 | if (!proc_create("powerpc/lparcfg", mode, NULL, &lparcfg_fops)) { |
188917e1 | 697 | printk(KERN_ERR "Failed to create powerpc/lparcfg\n"); |
1da177e4 LT |
698 | return -EIO; |
699 | } | |
1da177e4 LT |
700 | return 0; |
701 | } | |
702 | ||
1c21a293 | 703 | static void __exit lparcfg_cleanup(void) |
1da177e4 | 704 | { |
b177a292 | 705 | remove_proc_subtree("powerpc/lparcfg", NULL); |
1da177e4 LT |
706 | } |
707 | ||
708 | module_init(lparcfg_init); | |
709 | module_exit(lparcfg_cleanup); | |
710 | MODULE_DESCRIPTION("Interface for LPAR configuration data"); | |
711 | MODULE_AUTHOR("Dave Engebretsen"); | |
712 | MODULE_LICENSE("GPL"); |