2 * PowerPC64 LPAR Configuration Information Driver
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.
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.
17 * This driver creates a proc file at /proc/ppc64/lparcfg which contains
18 * keyword - value pairs that specify the configuration of the partition.
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>
28 #include <asm/iseries/hv_lp_config.h>
29 #include <asm/lppaca.h>
30 #include <asm/hvcall.h>
31 #include <asm/firmware.h>
33 #include <asm/system.h>
36 #include <asm/vdso_datapage.h>
38 #define MODULE_VERS "1.8"
39 #define MODULE_NAME "lparcfg"
41 /* #define LPARCFG_DEBUG */
43 static struct proc_dir_entry *proc_ppc64_lparcfg;
46 * Track sum of all purrs across all processors. This is used to further
47 * calculate usage values by different applications
49 static unsigned long get_purr(void)
51 unsigned long sum_purr = 0;
54 for_each_possible_cpu(cpu) {
55 if (firmware_has_feature(FW_FEATURE_ISERIES))
56 sum_purr += lppaca[cpu].emulated_time_base;
60 cu = &per_cpu(cpu_usage_array, cpu);
61 sum_purr += cu->current_tb;
67 #ifdef CONFIG_PPC_ISERIES
70 * Methods used to fetch LPAR data when running on an iSeries platform.
72 static int iseries_lparcfg_data(struct seq_file *m, void *v)
74 unsigned long pool_id;
75 int shared, entitled_capacity, max_entitled_capacity;
76 int processors, max_processors;
77 unsigned long purr = get_purr();
79 shared = (int)(local_paca->lppaca_ptr->shared_proc);
81 seq_printf(m, "system_active_processors=%d\n",
82 (int)HvLpConfig_getSystemPhysicalProcessors());
84 seq_printf(m, "system_potential_processors=%d\n",
85 (int)HvLpConfig_getSystemPhysicalProcessors());
87 processors = (int)HvLpConfig_getPhysicalProcessors();
88 seq_printf(m, "partition_active_processors=%d\n", processors);
90 max_processors = (int)HvLpConfig_getMaxPhysicalProcessors();
91 seq_printf(m, "partition_potential_processors=%d\n", max_processors);
94 entitled_capacity = HvLpConfig_getSharedProcUnits();
95 max_entitled_capacity = HvLpConfig_getMaxSharedProcUnits();
97 entitled_capacity = processors * 100;
98 max_entitled_capacity = max_processors * 100;
100 seq_printf(m, "partition_entitled_capacity=%d\n", entitled_capacity);
102 seq_printf(m, "partition_max_entitled_capacity=%d\n",
103 max_entitled_capacity);
106 pool_id = HvLpConfig_getSharedPoolIndex();
107 seq_printf(m, "pool=%d\n", (int)pool_id);
108 seq_printf(m, "pool_capacity=%d\n",
109 (int)(HvLpConfig_getNumProcsInSharedPool(pool_id) *
111 seq_printf(m, "purr=%ld\n", purr);
114 seq_printf(m, "shared_processor_mode=%d\n", shared);
119 #else /* CONFIG_PPC_ISERIES */
121 static int iseries_lparcfg_data(struct seq_file *m, void *v)
126 #endif /* CONFIG_PPC_ISERIES */
128 #ifdef CONFIG_PPC_PSERIES
130 * Methods used to fetch LPAR data when running on a pSeries platform.
134 * H_GET_MPP hcall returns info in 7 parms
136 int h_get_mpp(struct hvcall_mpp_data *mpp_data)
139 unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
141 rc = plpar_hcall9(H_GET_MPP, retbuf);
143 mpp_data->entitled_mem = retbuf[0];
144 mpp_data->mapped_mem = retbuf[1];
146 mpp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff;
147 mpp_data->pool_num = retbuf[2] & 0xffff;
149 mpp_data->mem_weight = (retbuf[3] >> 7 * 8) & 0xff;
150 mpp_data->unallocated_mem_weight = (retbuf[3] >> 6 * 8) & 0xff;
151 mpp_data->unallocated_entitlement = retbuf[3] & 0xffffffffffff;
153 mpp_data->pool_size = retbuf[4];
154 mpp_data->loan_request = retbuf[5];
155 mpp_data->backing_mem = retbuf[6];
159 EXPORT_SYMBOL(h_get_mpp);
161 struct hvcall_ppp_data {
163 u64 unallocated_entitlement;
168 u8 unallocated_weight;
169 u16 active_procs_in_pool;
170 u16 active_system_procs;
174 * H_GET_PPP hcall returns info in 4 parms.
175 * entitled_capacity,unallocated_capacity,
176 * aggregation, resource_capability).
178 * R4 = Entitled Processor Capacity Percentage.
179 * R5 = Unallocated Processor Capacity Percentage.
180 * R6 (AABBCCDDEEFFGGHH).
181 * XXXX - reserved (0)
182 * XXXX - reserved (0)
183 * XXXX - Group Number
184 * XXXX - Pool Number.
185 * R7 (IIJJKKLLMMNNOOPP).
187 * XX - bit 0-6 reserved (0). bit 7 is Capped indicator.
188 * XX - variable processor Capacity Weight
189 * XX - Unallocated Variable Processor Capacity Weight.
190 * XXXX - Active processors in Physical Processor Pool.
191 * XXXX - Processors active on platform.
193 static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data)
196 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
198 rc = plpar_hcall(H_GET_PPP, retbuf);
200 ppp_data->entitlement = retbuf[0];
201 ppp_data->unallocated_entitlement = retbuf[1];
203 ppp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff;
204 ppp_data->pool_num = retbuf[2] & 0xffff;
206 ppp_data->capped = (retbuf[3] >> 6 * 8) & 0x01;
207 ppp_data->weight = (retbuf[3] >> 5 * 8) & 0xff;
208 ppp_data->unallocated_weight = (retbuf[3] >> 4 * 8) & 0xff;
209 ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff;
210 ppp_data->active_system_procs = retbuf[3] & 0xffff;
215 static unsigned h_pic(unsigned long *pool_idle_time,
216 unsigned long *num_procs)
219 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
221 rc = plpar_hcall(H_PIC, retbuf);
223 *pool_idle_time = retbuf[0];
224 *num_procs = retbuf[1];
231 * Parse out the data returned from h_get_ppp and h_pic
233 static void parse_ppp_data(struct seq_file *m)
235 struct hvcall_ppp_data ppp_data;
238 rc = h_get_ppp(&ppp_data);
242 seq_printf(m, "partition_entitled_capacity=%ld\n",
243 ppp_data.entitlement);
244 seq_printf(m, "group=%d\n", ppp_data.group_num);
245 seq_printf(m, "system_active_processors=%d\n",
246 ppp_data.active_system_procs);
248 /* pool related entries are apropriate for shared configs */
249 if (lppaca[0].shared_proc) {
250 unsigned long pool_idle_time, pool_procs;
252 seq_printf(m, "pool=%d\n", ppp_data.pool_num);
254 /* report pool_capacity in percentage */
255 seq_printf(m, "pool_capacity=%d\n",
256 ppp_data.active_procs_in_pool * 100);
258 h_pic(&pool_idle_time, &pool_procs);
259 seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time);
260 seq_printf(m, "pool_num_procs=%ld\n", pool_procs);
263 seq_printf(m, "unallocated_capacity_weight=%d\n",
264 ppp_data.unallocated_weight);
265 seq_printf(m, "capacity_weight=%d\n", ppp_data.weight);
266 seq_printf(m, "capped=%d\n", ppp_data.capped);
267 seq_printf(m, "unallocated_capacity=%ld\n",
268 ppp_data.unallocated_entitlement);
273 * Parse out data returned from h_get_mpp
275 static void parse_mpp_data(struct seq_file *m)
277 struct hvcall_mpp_data mpp_data;
280 rc = h_get_mpp(&mpp_data);
284 seq_printf(m, "entitled_memory=%ld\n", mpp_data.entitled_mem);
286 if (mpp_data.mapped_mem != -1)
287 seq_printf(m, "mapped_entitled_memory=%ld\n",
288 mpp_data.mapped_mem);
290 seq_printf(m, "entitled_memory_group_number=%d\n", mpp_data.group_num);
291 seq_printf(m, "entitled_memory_pool_number=%d\n", mpp_data.pool_num);
293 seq_printf(m, "entitled_memory_weight=%d\n", mpp_data.mem_weight);
294 seq_printf(m, "unallocated_entitled_memory_weight=%d\n",
295 mpp_data.unallocated_mem_weight);
296 seq_printf(m, "unallocated_io_mapping_entitlement=%ld\n",
297 mpp_data.unallocated_entitlement);
299 if (mpp_data.pool_size != -1)
300 seq_printf(m, "entitled_memory_pool_size=%ld bytes\n",
303 seq_printf(m, "entitled_memory_loan_request=%ld\n",
304 mpp_data.loan_request);
306 seq_printf(m, "backing_memory=%ld bytes\n", mpp_data.backing_mem);
309 #define SPLPAR_CHARACTERISTICS_TOKEN 20
310 #define SPLPAR_MAXLENGTH 1026*(sizeof(char))
313 * parse_system_parameter_string()
314 * Retrieve the potential_processors, max_entitled_capacity and friends
315 * through the get-system-parameter rtas call. Replace keyword strings as
318 static void parse_system_parameter_string(struct seq_file *m)
322 unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
324 printk(KERN_ERR "%s %s kmalloc failure at line %d \n",
325 __FILE__, __func__, __LINE__);
329 spin_lock(&rtas_data_buf_lock);
330 memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH);
331 call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1,
333 SPLPAR_CHARACTERISTICS_TOKEN,
336 memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH);
337 spin_unlock(&rtas_data_buf_lock);
339 if (call_status != 0) {
341 "%s %s Error calling get-system-parameter (0x%x)\n",
342 __FILE__, __func__, call_status);
346 char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
348 printk(KERN_ERR "%s %s kmalloc failure at line %d \n",
349 __FILE__, __func__, __LINE__);
354 printk(KERN_INFO "success calling get-system-parameter \n");
356 splpar_strlen = local_buffer[0] * 256 + local_buffer[1];
357 local_buffer += 2; /* step over strlen value */
361 while ((*local_buffer) && (idx < splpar_strlen)) {
362 workbuffer[w_idx++] = local_buffer[idx++];
363 if ((local_buffer[idx] == ',')
364 || (local_buffer[idx] == '\0')) {
365 workbuffer[w_idx] = '\0';
367 /* avoid the empty string */
368 seq_printf(m, "%s\n", workbuffer);
370 memset(workbuffer, 0, SPLPAR_MAXLENGTH);
371 idx++; /* skip the comma */
373 } else if (local_buffer[idx] == '=') {
374 /* code here to replace workbuffer contents
375 with different keyword strings */
376 if (0 == strcmp(workbuffer, "MaxEntCap")) {
378 "partition_max_entitled_capacity");
379 w_idx = strlen(workbuffer);
381 if (0 == strcmp(workbuffer, "MaxPlatProcs")) {
383 "system_potential_processors");
384 w_idx = strlen(workbuffer);
389 local_buffer -= 2; /* back up over strlen value */
394 /* Return the number of processors in the system.
395 * This function reads through the device tree and counts
396 * the virtual processors, this does not include threads.
398 static int lparcfg_count_active_processors(void)
400 struct device_node *cpus_dn = NULL;
403 while ((cpus_dn = of_find_node_by_type(cpus_dn, "cpu"))) {
405 printk(KERN_ERR "cpus_dn %p \n", cpus_dn);
412 static void pseries_cmo_data(struct seq_file *m)
415 unsigned long cmo_faults = 0;
416 unsigned long cmo_fault_time = 0;
418 if (!firmware_has_feature(FW_FEATURE_CMO))
421 for_each_possible_cpu(cpu) {
422 cmo_faults += lppaca[cpu].cmo_faults;
423 cmo_fault_time += lppaca[cpu].cmo_fault_time;
426 seq_printf(m, "cmo_faults=%lu\n", cmo_faults);
427 seq_printf(m, "cmo_fault_time_usec=%lu\n",
428 cmo_fault_time / tb_ticks_per_usec);
431 static int pseries_lparcfg_data(struct seq_file *m, void *v)
433 int partition_potential_processors;
434 int partition_active_processors;
435 struct device_node *rtas_node;
436 const int *lrdrp = NULL;
438 rtas_node = of_find_node_by_path("/rtas");
440 lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL);
443 partition_potential_processors = vdso_data->processorCount;
445 partition_potential_processors = *(lrdrp + 4);
447 of_node_put(rtas_node);
449 partition_active_processors = lparcfg_count_active_processors();
451 if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
452 /* this call handles the ibm,get-system-parameter contents */
453 parse_system_parameter_string(m);
458 seq_printf(m, "purr=%ld\n", get_purr());
459 } else { /* non SPLPAR case */
461 seq_printf(m, "system_active_processors=%d\n",
462 partition_potential_processors);
464 seq_printf(m, "system_potential_processors=%d\n",
465 partition_potential_processors);
467 seq_printf(m, "partition_max_entitled_capacity=%d\n",
468 partition_potential_processors * 100);
470 seq_printf(m, "partition_entitled_capacity=%d\n",
471 partition_active_processors * 100);
474 seq_printf(m, "partition_active_processors=%d\n",
475 partition_active_processors);
477 seq_printf(m, "partition_potential_processors=%d\n",
478 partition_potential_processors);
480 seq_printf(m, "shared_processor_mode=%d\n", lppaca[0].shared_proc);
485 static ssize_t update_ppp(u64 *entitlement, u8 *weight)
487 struct hvcall_ppp_data ppp_data;
492 /* Get our current parameters */
493 retval = h_get_ppp(&ppp_data);
498 new_weight = ppp_data.weight;
499 new_entitled = *entitlement;
501 new_weight = *weight;
502 new_entitled = ppp_data.entitlement;
506 pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
507 __FUNCTION__, ppp_data.entitlement, ppp_data.weight);
509 pr_debug("%s: new_entitled = %lu, new_weight = %u\n",
510 __FUNCTION__, new_entitled, new_weight);
512 retval = plpar_hcall_norets(H_SET_PPP, new_entitled, new_weight);
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.
523 static ssize_t update_mpp(u64 *entitlement, u8 *weight)
525 struct hvcall_mpp_data mpp_data;
530 rc = h_get_mpp(&mpp_data);
535 new_weight = mpp_data.mem_weight;
536 new_entitled = *entitlement;
538 new_weight = *weight;
539 new_entitled = mpp_data.entitled_mem;
543 pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
544 __FUNCTION__, mpp_data.entitled_mem, mpp_data.mem_weight);
546 pr_debug("%s: new_entitled = %lu, new_weight = %u\n",
547 __FUNCTION__, new_entitled, new_weight);
549 rc = plpar_hcall_norets(H_SET_MPP, new_entitled, new_weight);
554 * Interface for changing system parameters (variable capacity weight
555 * and entitled capacity). Format of input is "param_name=value";
556 * anything after value is ignored. Valid parameters at this time are
557 * "partition_entitled_capacity" and "capacity_weight". We use
558 * H_SET_PPP to alter parameters.
560 * This function should be invoked only on systems with
563 static ssize_t lparcfg_write(struct file *file, const char __user * buf,
564 size_t count, loff_t * off)
568 u64 new_entitled, *new_entitled_ptr = &new_entitled;
569 u8 new_weight, *new_weight_ptr = &new_weight;
570 ssize_t retval = -ENOMEM;
572 if (!firmware_has_feature(FW_FEATURE_SPLPAR) ||
573 firmware_has_feature(FW_FEATURE_ISERIES))
576 kbuf = kmalloc(count, GFP_KERNEL);
581 if (copy_from_user(kbuf, buf, count))
585 kbuf[count - 1] = '\0';
586 tmp = strchr(kbuf, '=');
592 if (!strcmp(kbuf, "partition_entitled_capacity")) {
594 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
598 retval = update_ppp(new_entitled_ptr, NULL);
599 } else if (!strcmp(kbuf, "capacity_weight")) {
601 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
605 retval = update_ppp(NULL, new_weight_ptr);
606 } else if (!strcmp(kbuf, "entitled_memory")) {
608 *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
612 retval = update_mpp(new_entitled_ptr, NULL);
613 } else if (!strcmp(kbuf, "entitled_memory_weight")) {
615 *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
619 retval = update_mpp(NULL, new_weight_ptr);
623 if (retval == H_SUCCESS || retval == H_CONSTRAINED) {
625 } else if (retval == H_BUSY) {
627 } else if (retval == H_HARDWARE) {
629 } else if (retval == H_PARAMETER) {
632 printk(KERN_WARNING "%s: received unknown hv return code %ld",
642 #else /* CONFIG_PPC_PSERIES */
644 static int pseries_lparcfg_data(struct seq_file *m, void *v)
649 static ssize_t lparcfg_write(struct file *file, const char __user * buf,
650 size_t count, loff_t * off)
655 #endif /* CONFIG_PPC_PSERIES */
657 static int lparcfg_data(struct seq_file *m, void *v)
659 struct device_node *rootdn;
660 const char *model = "";
661 const char *system_id = "";
663 const unsigned int *lp_index_ptr;
664 unsigned int lp_index = 0;
666 seq_printf(m, "%s %s \n", MODULE_NAME, MODULE_VERS);
668 rootdn = of_find_node_by_path("/");
670 tmp = of_get_property(rootdn, "model", NULL);
673 /* Skip "IBM," - see platforms/iseries/dt.c */
674 if (firmware_has_feature(FW_FEATURE_ISERIES))
677 tmp = of_get_property(rootdn, "system-id", NULL);
680 /* Skip "IBM," - see platforms/iseries/dt.c */
681 if (firmware_has_feature(FW_FEATURE_ISERIES))
684 lp_index_ptr = of_get_property(rootdn, "ibm,partition-no",
687 lp_index = *lp_index_ptr;
690 seq_printf(m, "serial_number=%s\n", system_id);
691 seq_printf(m, "system_type=%s\n", model);
692 seq_printf(m, "partition_id=%d\n", (int)lp_index);
694 if (firmware_has_feature(FW_FEATURE_ISERIES))
695 return iseries_lparcfg_data(m, v);
696 return pseries_lparcfg_data(m, v);
699 static int lparcfg_open(struct inode *inode, struct file *file)
701 return single_open(file, lparcfg_data, NULL);
704 static const struct file_operations lparcfg_fops = {
705 .owner = THIS_MODULE,
707 .write = lparcfg_write,
708 .open = lparcfg_open,
709 .release = single_release,
712 static int __init lparcfg_init(void)
714 struct proc_dir_entry *ent;
715 mode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
717 /* Allow writing if we have FW_FEATURE_SPLPAR */
718 if (firmware_has_feature(FW_FEATURE_SPLPAR) &&
719 !firmware_has_feature(FW_FEATURE_ISERIES))
722 ent = proc_create("ppc64/lparcfg", mode, NULL, &lparcfg_fops);
724 printk(KERN_ERR "Failed to create ppc64/lparcfg\n");
728 proc_ppc64_lparcfg = ent;
732 static void __exit lparcfg_cleanup(void)
734 if (proc_ppc64_lparcfg)
735 remove_proc_entry("lparcfg", proc_ppc64_lparcfg->parent);
738 module_init(lparcfg_init);
739 module_exit(lparcfg_cleanup);
740 MODULE_DESCRIPTION("Interface for LPAR configuration data");
741 MODULE_AUTHOR("Dave Engebretsen");
742 MODULE_LICENSE("GPL");