blob: fc1f7a949b2bf25e5420138d40732e6590bee595 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#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>
Kelly Daly15b17182005-11-02 11:55:28 +110028#include <asm/iseries/hv_lp_config.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <asm/lppaca.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <asm/hvcall.h>
Stephen Rothwell1ababe12005-08-03 14:35:25 +100031#include <asm/firmware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <asm/rtas.h>
33#include <asm/system.h>
34#include <asm/time.h>
Michael Ellerman856509d2005-06-25 14:54:42 -070035#include <asm/prom.h>
Paul Mackerras271c3f32005-11-11 23:04:40 +110036#include <asm/vdso_datapage.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Will Schmidt34422fe2006-03-31 09:07:48 -060038#define MODULE_VERS "1.7"
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#define MODULE_NAME "lparcfg"
40
41/* #define LPARCFG_DEBUG */
42
Linus Torvalds1da177e2005-04-16 15:20:36 -070043static struct proc_dir_entry *proc_ppc64_lparcfg;
44#define LPARCFG_BUFF_SIZE 4096
45
Linus Torvalds1da177e2005-04-16 15:20:36 -070046/*
Stephen Rothwell16e9f992006-06-29 15:07:42 +100047 * Track sum of all purrs across all processors. This is used to further
48 * calculate usage values by different applications
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 */
50static unsigned long get_purr(void)
51{
52 unsigned long sum_purr = 0;
53 int cpu;
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
KAMEZAWA Hiroyuki0e551952006-03-28 14:50:51 -080055 for_each_possible_cpu(cpu) {
Stephen Rothwell16e9f992006-06-29 15:07:42 +100056 if (firmware_has_feature(FW_FEATURE_ISERIES))
57 sum_purr += lppaca[cpu].emulated_time_base;
58 else {
59 struct cpu_usage *cu;
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
Stephen Rothwell16e9f992006-06-29 15:07:42 +100061 cu = &per_cpu(cpu_usage_array, cpu);
62 sum_purr += cu->current_tb;
63 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 }
65 return sum_purr;
66}
67
Stephen Rothwell16e9f992006-06-29 15:07:42 +100068#ifdef CONFIG_PPC_ISERIES
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
David Gibsond3d21762005-11-10 15:26:20 +110070/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 * Methods used to fetch LPAR data when running on an iSeries platform.
72 */
Stephen Rothwell16e9f992006-06-29 15:07:42 +100073static int iseries_lparcfg_data(struct seq_file *m, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -070074{
Stephen Rothwell16e9f992006-06-29 15:07:42 +100075 unsigned long pool_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 int shared, entitled_capacity, max_entitled_capacity;
77 int processors, max_processors;
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 unsigned long purr = get_purr();
79
David Gibson3356bb9f72006-01-13 10:26:42 +110080 shared = (int)(get_lppaca()->shared_proc);
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
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}
Stephen Rothwell16e9f992006-06-29 15:07:42 +1000119
120#else /* CONFIG_PPC_ISERIES */
121
122static int iseries_lparcfg_data(struct seq_file *m, void *v)
123{
124 return 0;
125}
126
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127#endif /* CONFIG_PPC_ISERIES */
128
129#ifdef CONFIG_PPC_PSERIES
David Gibsond3d21762005-11-10 15:26:20 +1100130/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 * Methods used to fetch LPAR data when running on a pSeries platform.
132 */
Stephen Rothwelld7867952005-11-14 17:14:51 +1100133/* find a better place for this function... */
134static void log_plpar_hcall_return(unsigned long rc, char *tag)
135{
136 if (rc == 0) /* success, return */
137 return;
138/* check for null tag ? */
Segher Boessenkool706c8c92006-03-30 14:49:40 +0200139 if (rc == H_HARDWARE)
Stephen Rothwelld7867952005-11-14 17:14:51 +1100140 printk(KERN_INFO
141 "plpar-hcall (%s) failed with hardware fault\n", tag);
Segher Boessenkool706c8c92006-03-30 14:49:40 +0200142 else if (rc == H_FUNCTION)
Stephen Rothwelld7867952005-11-14 17:14:51 +1100143 printk(KERN_INFO
144 "plpar-hcall (%s) failed; function not allowed\n", tag);
Segher Boessenkool706c8c92006-03-30 14:49:40 +0200145 else if (rc == H_AUTHORITY)
Stephen Rothwelld7867952005-11-14 17:14:51 +1100146 printk(KERN_INFO
Segher Boessenkool706c8c92006-03-30 14:49:40 +0200147 "plpar-hcall (%s) failed; not authorized to this"
148 " function\n", tag);
149 else if (rc == H_PARAMETER)
Stephen Rothwelld7867952005-11-14 17:14:51 +1100150 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}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
159/*
160 * H_GET_PPP hcall returns info in 4 parms.
161 * entitled_capacity,unallocated_capacity,
162 * aggregation, resource_capability).
163 *
David Gibsond3d21762005-11-10 15:26:20 +1100164 * R4 = Entitled Processor Capacity Percentage.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 * 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.
David Gibsond3d21762005-11-10 15:26:20 +1100177 * XXXX - Processors active on platform.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 */
179static 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;
Anton Blanchardb9377ff2006-07-19 08:01:28 +1000185 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
186
187 rc = plpar_hcall(H_GET_PPP, retbuf);
188
189 *entitled = retbuf[0];
190 *unallocated = retbuf[1];
191 *aggregation = retbuf[2];
192 *resource = retbuf[3];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193
194 log_plpar_hcall_return(rc, "H_GET_PPP");
195
196 return rc;
197}
198
199static void h_pic(unsigned long *pool_idle_time, unsigned long *num_procs)
200{
201 unsigned long rc;
Anton Blanchardb9377ff2006-07-19 08:01:28 +1000202 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
203
204 rc = plpar_hcall(H_PIC, retbuf);
205
206 *pool_idle_time = retbuf[0];
207 *num_procs = retbuf[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
Segher Boessenkool706c8c92006-03-30 14:49:40 +0200209 if (rc != H_AUTHORITY)
Anton Blanchard8acb8882005-11-11 13:53:11 +1100210 log_plpar_hcall_return(rc, "H_PIC");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211}
212
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213#define SPLPAR_CHARACTERISTICS_TOKEN 20
214#define SPLPAR_MAXLENGTH 1026*(sizeof(char))
215
216/*
217 * parse_system_parameter_string()
218 * Retrieve the potential_processors, max_entitled_capacity and friends
219 * through the get-system-parameter rtas call. Replace keyword strings as
220 * necessary.
221 */
222static void parse_system_parameter_string(struct seq_file *m)
223{
224 int call_status;
225
Will Schmidt34422fe2006-03-31 09:07:48 -0600226 unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 if (!local_buffer) {
228 printk(KERN_ERR "%s %s kmalloc failure at line %d \n",
229 __FILE__, __FUNCTION__, __LINE__);
230 return;
231 }
232
233 spin_lock(&rtas_data_buf_lock);
234 memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH);
235 call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
236 NULL,
237 SPLPAR_CHARACTERISTICS_TOKEN,
Will Schmidt34422fe2006-03-31 09:07:48 -0600238 __pa(rtas_data_buf),
239 RTAS_DATA_BUF_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH);
241 spin_unlock(&rtas_data_buf_lock);
242
243 if (call_status != 0) {
244 printk(KERN_INFO
245 "%s %s Error calling get-system-parameter (0x%x)\n",
246 __FILE__, __FUNCTION__, call_status);
247 } else {
248 int splpar_strlen;
249 int idx, w_idx;
250 char *workbuffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
251 if (!workbuffer) {
252 printk(KERN_ERR "%s %s kmalloc failure at line %d \n",
253 __FILE__, __FUNCTION__, __LINE__);
David Gibsond3d21762005-11-10 15:26:20 +1100254 kfree(local_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 return;
256 }
257#ifdef LPARCFG_DEBUG
258 printk(KERN_INFO "success calling get-system-parameter \n");
259#endif
Will Schmidt34422fe2006-03-31 09:07:48 -0600260 splpar_strlen = local_buffer[0] * 256 + local_buffer[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 local_buffer += 2; /* step over strlen value */
262
263 memset(workbuffer, 0, SPLPAR_MAXLENGTH);
264 w_idx = 0;
265 idx = 0;
266 while ((*local_buffer) && (idx < splpar_strlen)) {
267 workbuffer[w_idx++] = local_buffer[idx++];
268 if ((local_buffer[idx] == ',')
269 || (local_buffer[idx] == '\0')) {
270 workbuffer[w_idx] = '\0';
271 if (w_idx) {
272 /* avoid the empty string */
273 seq_printf(m, "%s\n", workbuffer);
274 }
275 memset(workbuffer, 0, SPLPAR_MAXLENGTH);
276 idx++; /* skip the comma */
277 w_idx = 0;
278 } else if (local_buffer[idx] == '=') {
279 /* code here to replace workbuffer contents
280 with different keyword strings */
281 if (0 == strcmp(workbuffer, "MaxEntCap")) {
282 strcpy(workbuffer,
283 "partition_max_entitled_capacity");
284 w_idx = strlen(workbuffer);
285 }
286 if (0 == strcmp(workbuffer, "MaxPlatProcs")) {
287 strcpy(workbuffer,
288 "system_potential_processors");
289 w_idx = strlen(workbuffer);
290 }
291 }
292 }
293 kfree(workbuffer);
294 local_buffer -= 2; /* back up over strlen value */
295 }
296 kfree(local_buffer);
297}
298
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299/* Return the number of processors in the system.
300 * This function reads through the device tree and counts
301 * the virtual processors, this does not include threads.
302 */
303static int lparcfg_count_active_processors(void)
304{
305 struct device_node *cpus_dn = NULL;
306 int count = 0;
307
308 while ((cpus_dn = of_find_node_by_type(cpus_dn, "cpu"))) {
309#ifdef LPARCFG_DEBUG
310 printk(KERN_ERR "cpus_dn %p \n", cpus_dn);
311#endif
312 count++;
313 }
314 return count;
315}
316
Stephen Rothwell16e9f992006-06-29 15:07:42 +1000317static int pseries_lparcfg_data(struct seq_file *m, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318{
319 int partition_potential_processors;
320 int partition_active_processors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 struct device_node *rtas_node;
Jeremy Kerra7f67bd2006-07-12 15:35:54 +1000322 const int *lrdrp = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
Stephen Rothwell8c8dc322007-04-24 13:50:55 +1000324 rtas_node = of_find_node_by_path("/rtas");
Olof Johansson2b9a32e2006-02-15 21:40:44 -0600325 if (rtas_node)
Stephen Rothwelle2eb6392007-04-03 22:26:41 +1000326 lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
328 if (lrdrp == NULL) {
Paul Mackerras271c3f32005-11-11 23:04:40 +1100329 partition_potential_processors = vdso_data->processorCount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 } else {
331 partition_potential_processors = *(lrdrp + 4);
332 }
Stephen Rothwell8c8dc322007-04-24 13:50:55 +1000333 of_node_put(rtas_node);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
335 partition_active_processors = lparcfg_count_active_processors();
336
Stephen Rothwell1ababe12005-08-03 14:35:25 +1000337 if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 unsigned long h_entitled, h_unallocated;
339 unsigned long h_aggregation, h_resource;
340 unsigned long pool_idle_time, pool_procs;
341 unsigned long purr;
342
343 h_get_ppp(&h_entitled, &h_unallocated, &h_aggregation,
344 &h_resource);
345
346 seq_printf(m, "R4=0x%lx\n", h_entitled);
347 seq_printf(m, "R5=0x%lx\n", h_unallocated);
348 seq_printf(m, "R6=0x%lx\n", h_aggregation);
349 seq_printf(m, "R7=0x%lx\n", h_resource);
350
351 purr = get_purr();
352
353 /* this call handles the ibm,get-system-parameter contents */
354 parse_system_parameter_string(m);
355
356 seq_printf(m, "partition_entitled_capacity=%ld\n", h_entitled);
357
358 seq_printf(m, "group=%ld\n", (h_aggregation >> 2 * 8) & 0xffff);
359
360 seq_printf(m, "system_active_processors=%ld\n",
361 (h_resource >> 0 * 8) & 0xffff);
362
363 /* pool related entries are apropriate for shared configs */
David Gibson3356bb9f72006-01-13 10:26:42 +1100364 if (lppaca[0].shared_proc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365
366 h_pic(&pool_idle_time, &pool_procs);
367
368 seq_printf(m, "pool=%ld\n",
369 (h_aggregation >> 0 * 8) & 0xffff);
370
371 /* report pool_capacity in percentage */
372 seq_printf(m, "pool_capacity=%ld\n",
373 ((h_resource >> 2 * 8) & 0xffff) * 100);
374
375 seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time);
376
377 seq_printf(m, "pool_num_procs=%ld\n", pool_procs);
378 }
379
380 seq_printf(m, "unallocated_capacity_weight=%ld\n",
381 (h_resource >> 4 * 8) & 0xFF);
382
383 seq_printf(m, "capacity_weight=%ld\n",
384 (h_resource >> 5 * 8) & 0xFF);
385
386 seq_printf(m, "capped=%ld\n", (h_resource >> 6 * 8) & 0x01);
387
388 seq_printf(m, "unallocated_capacity=%ld\n", h_unallocated);
389
390 seq_printf(m, "purr=%ld\n", purr);
391
392 } else { /* non SPLPAR case */
393
394 seq_printf(m, "system_active_processors=%d\n",
395 partition_potential_processors);
396
397 seq_printf(m, "system_potential_processors=%d\n",
398 partition_potential_processors);
399
400 seq_printf(m, "partition_max_entitled_capacity=%d\n",
401 partition_potential_processors * 100);
402
403 seq_printf(m, "partition_entitled_capacity=%d\n",
404 partition_active_processors * 100);
405 }
406
407 seq_printf(m, "partition_active_processors=%d\n",
408 partition_active_processors);
409
410 seq_printf(m, "partition_potential_processors=%d\n",
411 partition_potential_processors);
412
David Gibson3356bb9f72006-01-13 10:26:42 +1100413 seq_printf(m, "shared_processor_mode=%d\n", lppaca[0].shared_proc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414
415 return 0;
416}
417
418/*
419 * Interface for changing system parameters (variable capacity weight
420 * and entitled capacity). Format of input is "param_name=value";
421 * anything after value is ignored. Valid parameters at this time are
422 * "partition_entitled_capacity" and "capacity_weight". We use
423 * H_SET_PPP to alter parameters.
424 *
425 * This function should be invoked only on systems with
426 * FW_FEATURE_SPLPAR.
427 */
428static ssize_t lparcfg_write(struct file *file, const char __user * buf,
429 size_t count, loff_t * off)
430{
431 char *kbuf;
432 char *tmp;
433 u64 new_entitled, *new_entitled_ptr = &new_entitled;
434 u8 new_weight, *new_weight_ptr = &new_weight;
435
436 unsigned long current_entitled; /* parameters for h_get_ppp */
437 unsigned long dummy;
438 unsigned long resource;
439 u8 current_weight;
440
441 ssize_t retval = -ENOMEM;
442
Stephen Rothwell0524aad2007-02-05 16:14:05 -0800443 if (!firmware_has_feature(FW_FEATURE_SPLPAR) ||
444 firmware_has_feature(FW_FEATURE_ISERIES))
445 return -EINVAL;
446
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 kbuf = kmalloc(count, GFP_KERNEL);
448 if (!kbuf)
449 goto out;
450
451 retval = -EFAULT;
452 if (copy_from_user(kbuf, buf, count))
453 goto out;
454
455 retval = -EINVAL;
456 kbuf[count - 1] = '\0';
457 tmp = strchr(kbuf, '=');
458 if (!tmp)
459 goto out;
460
461 *tmp++ = '\0';
462
463 if (!strcmp(kbuf, "partition_entitled_capacity")) {
464 char *endp;
465 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
466 if (endp == tmp)
467 goto out;
468 new_weight_ptr = &current_weight;
469 } else if (!strcmp(kbuf, "capacity_weight")) {
470 char *endp;
471 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
472 if (endp == tmp)
473 goto out;
474 new_entitled_ptr = &current_entitled;
475 } else
476 goto out;
477
478 /* Get our current parameters */
479 retval = h_get_ppp(&current_entitled, &dummy, &dummy, &resource);
480 if (retval) {
481 retval = -EIO;
482 goto out;
483 }
484
485 current_weight = (resource >> 5 * 8) & 0xFF;
486
jimix@watson.ibm.com8ae5b282006-05-17 12:00:35 -0400487 pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 __FUNCTION__, current_entitled, current_weight);
489
jimix@watson.ibm.com8ae5b282006-05-17 12:00:35 -0400490 pr_debug("%s: new_entitled = %lu, new_weight = %u\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 __FUNCTION__, *new_entitled_ptr, *new_weight_ptr);
492
493 retval = plpar_hcall_norets(H_SET_PPP, *new_entitled_ptr,
494 *new_weight_ptr);
495
Segher Boessenkool706c8c92006-03-30 14:49:40 +0200496 if (retval == H_SUCCESS || retval == H_CONSTRAINED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 retval = count;
Segher Boessenkool706c8c92006-03-30 14:49:40 +0200498 } else if (retval == H_BUSY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 retval = -EBUSY;
Segher Boessenkool706c8c92006-03-30 14:49:40 +0200500 } else if (retval == H_HARDWARE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 retval = -EIO;
Segher Boessenkool706c8c92006-03-30 14:49:40 +0200502 } else if (retval == H_PARAMETER) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 retval = -EINVAL;
504 } else {
505 printk(KERN_WARNING "%s: received unknown hv return code %ld",
506 __FUNCTION__, retval);
507 retval = -EIO;
508 }
509
Anton Blanchard8acb8882005-11-11 13:53:11 +1100510out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 kfree(kbuf);
512 return retval;
513}
514
Stephen Rothwell16e9f992006-06-29 15:07:42 +1000515#else /* CONFIG_PPC_PSERIES */
516
517static int pseries_lparcfg_data(struct seq_file *m, void *v)
518{
519 return 0;
520}
521
522static ssize_t lparcfg_write(struct file *file, const char __user * buf,
523 size_t count, loff_t * off)
524{
Stephen Rothwell0524aad2007-02-05 16:14:05 -0800525 return -EINVAL;
Stephen Rothwell16e9f992006-06-29 15:07:42 +1000526}
527
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528#endif /* CONFIG_PPC_PSERIES */
529
Stephen Rothwell16e9f992006-06-29 15:07:42 +1000530static int lparcfg_data(struct seq_file *m, void *v)
531{
532 struct device_node *rootdn;
533 const char *model = "";
534 const char *system_id = "";
535 const char *tmp;
Jeremy Kerra7f67bd2006-07-12 15:35:54 +1000536 const unsigned int *lp_index_ptr;
537 unsigned int lp_index = 0;
Stephen Rothwell16e9f992006-06-29 15:07:42 +1000538
539 seq_printf(m, "%s %s \n", MODULE_NAME, MODULE_VERS);
540
Stephen Rothwell8c8dc322007-04-24 13:50:55 +1000541 rootdn = of_find_node_by_path("/");
Stephen Rothwell16e9f992006-06-29 15:07:42 +1000542 if (rootdn) {
Stephen Rothwelle2eb6392007-04-03 22:26:41 +1000543 tmp = of_get_property(rootdn, "model", NULL);
Stephen Rothwell16e9f992006-06-29 15:07:42 +1000544 if (tmp) {
545 model = tmp;
546 /* Skip "IBM," - see platforms/iseries/dt.c */
547 if (firmware_has_feature(FW_FEATURE_ISERIES))
548 model += 4;
549 }
Stephen Rothwelle2eb6392007-04-03 22:26:41 +1000550 tmp = of_get_property(rootdn, "system-id", NULL);
Stephen Rothwell16e9f992006-06-29 15:07:42 +1000551 if (tmp) {
552 system_id = tmp;
553 /* Skip "IBM," - see platforms/iseries/dt.c */
554 if (firmware_has_feature(FW_FEATURE_ISERIES))
555 system_id += 4;
556 }
Stephen Rothwelle2eb6392007-04-03 22:26:41 +1000557 lp_index_ptr = of_get_property(rootdn, "ibm,partition-no",
558 NULL);
Stephen Rothwell16e9f992006-06-29 15:07:42 +1000559 if (lp_index_ptr)
560 lp_index = *lp_index_ptr;
Stephen Rothwell8c8dc322007-04-24 13:50:55 +1000561 of_node_put(rootdn);
Stephen Rothwell16e9f992006-06-29 15:07:42 +1000562 }
563 seq_printf(m, "serial_number=%s\n", system_id);
564 seq_printf(m, "system_type=%s\n", model);
565 seq_printf(m, "partition_id=%d\n", (int)lp_index);
566
567 if (firmware_has_feature(FW_FEATURE_ISERIES))
568 return iseries_lparcfg_data(m, v);
569 return pseries_lparcfg_data(m, v);
570}
571
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572static int lparcfg_open(struct inode *inode, struct file *file)
573{
574 return single_open(file, lparcfg_data, NULL);
575}
576
Arjan van de Ven5dfe4c92007-02-12 00:55:31 -0800577const struct file_operations lparcfg_fops = {
Anton Blanchard8acb8882005-11-11 13:53:11 +1100578 .owner = THIS_MODULE,
579 .read = seq_read,
Stephen Rothwell0524aad2007-02-05 16:14:05 -0800580 .write = lparcfg_write,
Anton Blanchard8acb8882005-11-11 13:53:11 +1100581 .open = lparcfg_open,
582 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583};
584
585int __init lparcfg_init(void)
586{
587 struct proc_dir_entry *ent;
Wim Coekaerts71839262005-09-05 20:22:47 -0700588 mode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589
590 /* Allow writing if we have FW_FEATURE_SPLPAR */
Stephen Rothwell16e9f992006-06-29 15:07:42 +1000591 if (firmware_has_feature(FW_FEATURE_SPLPAR) &&
Stephen Rothwell0524aad2007-02-05 16:14:05 -0800592 !firmware_has_feature(FW_FEATURE_ISERIES))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 mode |= S_IWUSR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594
595 ent = create_proc_entry("ppc64/lparcfg", mode, NULL);
596 if (ent) {
597 ent->proc_fops = &lparcfg_fops;
598 ent->data = kmalloc(LPARCFG_BUFF_SIZE, GFP_KERNEL);
599 if (!ent->data) {
600 printk(KERN_ERR
601 "Failed to allocate buffer for lparcfg\n");
602 remove_proc_entry("lparcfg", ent->parent);
603 return -ENOMEM;
604 }
605 } else {
606 printk(KERN_ERR "Failed to create ppc64/lparcfg\n");
607 return -EIO;
608 }
609
610 proc_ppc64_lparcfg = ent;
611 return 0;
612}
613
614void __exit lparcfg_cleanup(void)
615{
616 if (proc_ppc64_lparcfg) {
Jesper Juhlb2325fe2005-11-07 01:01:35 -0800617 kfree(proc_ppc64_lparcfg->data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 remove_proc_entry("lparcfg", proc_ppc64_lparcfg->parent);
619 }
620}
621
622module_init(lparcfg_init);
623module_exit(lparcfg_cleanup);
624MODULE_DESCRIPTION("Interface for LPAR configuration data");
625MODULE_AUTHOR("Dave Engebretsen");
626MODULE_LICENSE("GPL");