diff options
Diffstat (limited to 'arch/ppc64/kernel/lparcfg.c')
| -rw-r--r-- | arch/ppc64/kernel/lparcfg.c | 612 |
1 files changed, 0 insertions, 612 deletions
diff --git a/arch/ppc64/kernel/lparcfg.c b/arch/ppc64/kernel/lparcfg.c deleted file mode 100644 index a80ed30..0000000 --- a/arch/ppc64/kernel/lparcfg.c +++ /dev/null @@ -1,612 +0,0 @@ -/* - * PowerPC64 LPAR Configuration Information Driver - * - * Dave Engebretsen engebret@us.ibm.com - * Copyright (c) 2003 Dave Engebretsen - * Will Schmidt willschm@us.ibm.com - * SPLPAR updates, Copyright (c) 2003 Will Schmidt IBM Corporation. - * seq_file updates, Copyright (c) 2004 Will Schmidt IBM Corporation. - * Nathan Lynch nathanl@austin.ibm.com - * Added lparcfg_write, Copyright (C) 2004 Nathan Lynch IBM Corporation. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - * This driver creates a proc file at /proc/ppc64/lparcfg which contains - * keyword - value pairs that specify the configuration of the partition. - */ - -#include <linux/config.h> -#include <linux/module.h> -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/proc_fs.h> -#include <linux/init.h> -#include <linux/seq_file.h> -#include <asm/uaccess.h> -#include <asm/iseries/hv_lp_config.h> -#include <asm/lppaca.h> -#include <asm/hvcall.h> -#include <asm/firmware.h> -#include <asm/rtas.h> -#include <asm/system.h> -#include <asm/time.h> -#include <asm/iseries/it_exp_vpd_panel.h> -#include <asm/prom.h> -#include <asm/systemcfg.h> - -#define MODULE_VERS "1.6" -#define MODULE_NAME "lparcfg" - -/* #define LPARCFG_DEBUG */ - -/* find a better place for this function... */ -void log_plpar_hcall_return(unsigned long rc, char *tag) -{ - if (rc == 0) /* success, return */ - return; -/* check for null tag ? */ - if (rc == H_Hardware) - printk(KERN_INFO - "plpar-hcall (%s) failed with hardware fault\n", tag); - else if (rc == H_Function) - printk(KERN_INFO - "plpar-hcall (%s) failed; function not allowed\n", tag); - else if (rc == H_Authority) - printk(KERN_INFO - "plpar-hcall (%s) failed; not authorized to this function\n", - tag); - else if (rc == H_Parameter) - printk(KERN_INFO "plpar-hcall (%s) failed; Bad parameter(s)\n", - tag); - else - printk(KERN_INFO - "plpar-hcall (%s) failed with unexpected rc(0x%lx)\n", - tag, rc); - -} - -static struct proc_dir_entry *proc_ppc64_lparcfg; -#define LPARCFG_BUFF_SIZE 4096 - -#ifdef CONFIG_PPC_ISERIES - -/* - * For iSeries legacy systems, the PPA purr function is available from the - * emulated_time_base field in the paca. - */ -static unsigned long get_purr(void) -{ - unsigned long sum_purr = 0; - int cpu; - struct paca_struct *lpaca; - - for_each_cpu(cpu) { - lpaca = paca + cpu; - sum_purr += lpaca->lppaca.emulated_time_base; - -#ifdef PURR_DEBUG - printk(KERN_INFO "get_purr for cpu (%d) has value (%ld) \n", - cpu, lpaca->lppaca.emulated_time_base); -#endif - } - return sum_purr; -} - -#define lparcfg_write NULL - -/* - * Methods used to fetch LPAR data when running on an iSeries platform. - */ -static int lparcfg_data(struct seq_file *m, void *v) -{ - unsigned long pool_id, lp_index; - int shared, entitled_capacity, max_entitled_capacity; - int processors, max_processors; - struct paca_struct *lpaca = get_paca(); - unsigned long purr = get_purr(); - - seq_printf(m, "%s %s \n", MODULE_NAME, MODULE_VERS); - - shared = (int)(lpaca->lppaca_ptr->shared_proc); - seq_printf(m, "serial_number=%c%c%c%c%c%c%c\n", - e2a(xItExtVpdPanel.mfgID[2]), - e2a(xItExtVpdPanel.mfgID[3]), - e2a(xItExtVpdPanel.systemSerial[1]), - e2a(xItExtVpdPanel.systemSerial[2]), - e2a(xItExtVpdPanel.systemSerial[3]), - e2a(xItExtVpdPanel.systemSerial[4]), - e2a(xItExtVpdPanel.systemSerial[5])); - - seq_printf(m, "system_type=%c%c%c%c\n", - e2a(xItExtVpdPanel.machineType[0]), - e2a(xItExtVpdPanel.machineType[1]), - e2a(xItExtVpdPanel.machineType[2]), - e2a(xItExtVpdPanel.machineType[3])); - - lp_index = HvLpConfig_getLpIndex(); - seq_printf(m, "partition_id=%d\n", (int)lp_index); - - seq_printf(m, "system_active_processors=%d\n", - (int)HvLpConfig_getSystemPhysicalProcessors()); - - seq_printf(m, "system_potential_processors=%d\n", - (int)HvLpConfig_getSystemPhysicalProcessors()); - - processors = (int)HvLpConfig_getPhysicalProcessors(); - seq_printf(m, "partition_active_processors=%d\n", processors); - - max_processors = (int)HvLpConfig_getMaxPhysicalProcessors(); - seq_printf(m, "partition_potential_processors=%d\n", max_processors); - - if (shared) { - entitled_capacity = HvLpConfig_getSharedProcUnits(); - max_entitled_capacity = HvLpConfig_getMaxSharedProcUnits(); - } else { - entitled_capacity = processors * 100; - max_entitled_capacity = max_processors * 100; - } - seq_printf(m, "partition_entitled_capacity=%d\n", entitled_capacity); - - seq_printf(m, "partition_max_entitled_capacity=%d\n", - max_entitled_capacity); - - if (shared) { - pool_id = HvLpConfig_getSharedPoolIndex(); - seq_printf(m, "pool=%d\n", (int)pool_id); - seq_printf(m, "pool_capacity=%d\n", - (int)(HvLpConfig_getNumProcsInSharedPool(pool_id) * - 100)); - seq_printf(m, "purr=%ld\n", purr); - } - - seq_printf(m, "shared_processor_mode=%d\n", shared); - - return 0; -} -#endif /* CONFIG_PPC_ISERIES */ - -#ifdef CONFIG_PPC_PSERIES -/* - * Methods used to fetch LPAR data when running on a pSeries platform. - */ - -/* - * H_GET_PPP hcall returns info in 4 parms. - * entitled_capacity,unallocated_capacity, - * aggregation, resource_capability). - * - * R4 = Entitled Processor Capacity Percentage. - * R5 = Unallocated Processor Capacity Percentage. - * R6 (AABBCCDDEEFFGGHH). - * XXXX - reserved (0) - * XXXX - reserved (0) - * XXXX - Group Number - * XXXX - Pool Number. - * R7 (IIJJKKLLMMNNOOPP). - * XX - reserved. (0) - * XX - bit 0-6 reserved (0). bit 7 is Capped indicator. - * XX - variable processor Capacity Weight - * XX - Unallocated Variable Processor Capacity Weight. - * XXXX - Active processors in Physical Processor Pool. - * XXXX - Processors active on platform. - */ -static unsigned int h_get_ppp(unsigned long *entitled, - unsigned long *unallocated, - unsigned long *aggregation, - unsigned long *resource) -{ - unsigned long rc; - rc = plpar_hcall_4out(H_GET_PPP, 0, 0, 0, 0, entitled, unallocated, - aggregation, resource); - - log_plpar_hcall_return(rc, "H_GET_PPP"); - - return rc; -} - -static void h_pic(unsigned long *pool_idle_time, unsigned long *num_procs) -{ - unsigned long rc; - unsigned long dummy; - rc = plpar_hcall(H_PIC, 0, 0, 0, 0, pool_idle_time, num_procs, &dummy); - - log_plpar_hcall_return(rc, "H_PIC"); -} - -static unsigned long get_purr(void); - -/* Track sum of all purrs across all processors. This is used to further */ -/* calculate usage values by different applications */ - -static unsigned long get_purr(void) -{ - unsigned long sum_purr = 0; - int cpu; - struct cpu_usage *cu; - - for_each_cpu(cpu) { - cu = &per_cpu(cpu_usage_array, cpu); - sum_purr += cu->current_tb; - } - return sum_purr; -} - -#define SPLPAR_CHARACTERISTICS_TOKEN 20 -#define SPLPAR_MAXLENGTH 1026*(sizeof(char)) - -/* - * parse_system_parameter_string() - * Retrieve the potential_processors, max_entitled_capacity and friends - * through the get-system-parameter rtas call. Replace keyword strings as - * necessary. - */ -static void parse_system_parameter_string(struct seq_file *m) -{ - int call_status; - - char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL); - if (!local_buffer) { - printk(KERN_ERR "%s %s kmalloc failure at line %d \n", - __FILE__, __FUNCTION__, __LINE__); - return; - } - - spin_lock(&rtas_data_buf_lock); - memset(rtas_data_buf, 0, SPLPAR_MAXLENGTH); - call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1, - NULL, - SPLPAR_CHARACTERISTICS_TOKEN, - __pa(rtas_data_buf)); - memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH); - spin_unlock(&rtas_data_buf_lock); - - if (call_status != 0) { - printk(KERN_INFO - "%s %s Error calling get-system-parameter (0x%x)\n", - __FILE__, __FUNCTION__, call_status); - } else { - int splpar_strlen; - int idx, w_idx; - char *workbuffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL); - if (!workbuffer) { - printk(KERN_ERR "%s %s kmalloc failure at line %d \n", - __FILE__, __FUNCTION__, __LINE__); - kfree(local_buffer); - return; - } -#ifdef LPARCFG_DEBUG - printk(KERN_INFO "success calling get-system-parameter \n"); -#endif - splpar_strlen = local_buffer[0] * 16 + local_buffer[1]; - local_buffer += 2; /* step over strlen value */ - - memset(workbuffer, 0, SPLPAR_MAXLENGTH); - w_idx = 0; - idx = 0; - while ((*local_buffer) && (idx < splpar_strlen)) { - workbuffer[w_idx++] = local_buffer[idx++]; - if ((local_buffer[idx] == ',') - || (local_buffer[idx] == '\0')) { - workbuffer[w_idx] = '\0'; - if (w_idx) { - /* avoid the empty string */ - seq_printf(m, "%s\n", workbuffer); - } - memset(workbuffer, 0, SPLPAR_MAXLENGTH); - idx++; /* skip the comma */ - w_idx = 0; - } else if (local_buffer[idx] == '=') { - /* code here to replace workbuffer contents - with different keyword strings */ - if (0 == strcmp(workbuffer, "MaxEntCap")) { - strcpy(workbuffer, - "partition_max_entitled_capacity"); - w_idx = strlen(workbuffer); - } - if (0 == strcmp(workbuffer, "MaxPlatProcs")) { - strcpy(workbuffer, - "system_potential_processors"); - w_idx = strlen(workbuffer); - } - } - } - kfree(workbuffer); - local_buffer -= 2; /* back up over strlen value */ - } - kfree(local_buffer); -} - -static int lparcfg_count_active_processors(void); - -/* Return the number of processors in the system. - * This function reads through the device tree and counts - * the virtual processors, this does not include threads. - */ -static int lparcfg_count_active_processors(void) -{ - struct device_node *cpus_dn = NULL; - int count = 0; - - while ((cpus_dn = of_find_node_by_type(cpus_dn, "cpu"))) { -#ifdef LPARCFG_DEBUG - printk(KERN_ERR "cpus_dn %p \n", cpus_dn); -#endif - count++; - } - return count; -} - -static int lparcfg_data(struct seq_file *m, void *v) -{ - int partition_potential_processors; - int partition_active_processors; - struct device_node *rootdn; - const char *model = ""; - const char *system_id = ""; - unsigned int *lp_index_ptr, lp_index = 0; - struct device_node *rtas_node; - int *lrdrp; - - rootdn = find_path_device("/"); - if (rootdn) { - model = get_property(rootdn, "model", NULL); - system_id = get_property(rootdn, "system-id", NULL); - lp_index_ptr = (unsigned int *) - get_property(rootdn, "ibm,partition-no", NULL); - if (lp_index_ptr) - lp_index = *lp_index_ptr; - } - - seq_printf(m, "%s %s \n", MODULE_NAME, MODULE_VERS); - - seq_printf(m, "serial_number=%s\n", system_id); - - seq_printf(m, "system_type=%s\n", model); - - seq_printf(m, "partition_id=%d\n", (int)lp_index); - - rtas_node = find_path_device("/rtas"); - lrdrp = (int *)get_property(rtas_node, "ibm,lrdr-capacity", NULL); - - if (lrdrp == NULL) { - partition_potential_processors = _systemcfg->processorCount; - } else { - partition_potential_processors = *(lrdrp + 4); - } - - partition_active_processors = lparcfg_count_active_processors(); - - if (firmware_has_feature(FW_FEATURE_SPLPAR)) { - unsigned long h_entitled, h_unallocated; - unsigned long h_aggregation, h_resource; - unsigned long pool_idle_time, pool_procs; - unsigned long purr; - - h_get_ppp(&h_entitled, &h_unallocated, &h_aggregation, - &h_resource); - - seq_printf(m, "R4=0x%lx\n", h_entitled); - seq_printf(m, "R5=0x%lx\n", h_unallocated); - seq_printf(m, "R6=0x%lx\n", h_aggregation); - seq_printf(m, "R7=0x%lx\n", h_resource); - - purr = get_purr(); - - /* this call handles the ibm,get-system-parameter contents */ - parse_system_parameter_string(m); - - seq_printf(m, "partition_entitled_capacity=%ld\n", h_entitled); - - seq_printf(m, "group=%ld\n", (h_aggregation >> 2 * 8) & 0xffff); - - seq_printf(m, "system_active_processors=%ld\n", - (h_resource >> 0 * 8) & 0xffff); - - /* pool related entries are apropriate for shared configs */ - if (paca[0].lppaca.shared_proc) { - - h_pic(&pool_idle_time, &pool_procs); - - seq_printf(m, "pool=%ld\n", - (h_aggregation >> 0 * 8) & 0xffff); - - /* report pool_capacity in percentage */ - seq_printf(m, "pool_capacity=%ld\n", - ((h_resource >> 2 * 8) & 0xffff) * 100); - - seq_printf(m, "pool_idle_time=%ld\n", pool_idle_time); - - seq_printf(m, "pool_num_procs=%ld\n", pool_procs); - } - - seq_printf(m, "unallocated_capacity_weight=%ld\n", - (h_resource >> 4 * 8) & 0xFF); - - seq_printf(m, "capacity_weight=%ld\n", - (h_resource >> 5 * 8) & 0xFF); - - seq_printf(m, "capped=%ld\n", (h_resource >> 6 * 8) & 0x01); - - seq_printf(m, "unallocated_capacity=%ld\n", h_unallocated); - - seq_printf(m, "purr=%ld\n", purr); - - } else { /* non SPLPAR case */ - - seq_printf(m, "system_active_processors=%d\n", - partition_potential_processors); - - seq_printf(m, "system_potential_processors=%d\n", - partition_potential_processors); - - seq_printf(m, "partition_max_entitled_capacity=%d\n", - partition_potential_processors * 100); - - seq_printf(m, "partition_entitled_capacity=%d\n", - partition_active_processors * 100); - } - - seq_printf(m, "partition_active_processors=%d\n", - partition_active_processors); - - seq_printf(m, "partition_potential_processors=%d\n", - partition_potential_processors); - - seq_printf(m, "shared_processor_mode=%d\n", paca[0].lppaca.shared_proc); - - return 0; -} - -/* - * Interface for changing system parameters (variable capacity weight - * and entitled capacity). Format of input is "param_name=value"; - * anything after value is ignored. Valid parameters at this time are - * "partition_entitled_capacity" and "capacity_weight". We use - * H_SET_PPP to alter parameters. - * - * This function should be invoked only on systems with - * FW_FEATURE_SPLPAR. - */ -static ssize_t lparcfg_write(struct file *file, const char __user * buf, - size_t count, loff_t * off) -{ - char *kbuf; - char *tmp; - u64 new_entitled, *new_entitled_ptr = &new_entitled; - u8 new_weight, *new_weight_ptr = &new_weight; - - unsigned long current_entitled; /* parameters for h_get_ppp */ - unsigned long dummy; - unsigned long resource; - u8 current_weight; - - ssize_t retval = -ENOMEM; - - kbuf = kmalloc(count, GFP_KERNEL); - if (!kbuf) - goto out; - - retval = -EFAULT; - if (copy_from_user(kbuf, buf, count)) - goto out; - - retval = -EINVAL; - kbuf[count - 1] = '\0'; - tmp = strchr(kbuf, '='); - if (!tmp) - goto out; - - *tmp++ = '\0'; - - if (!strcmp(kbuf, "partition_entitled_capacity")) { - char *endp; - *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10); - if (endp == tmp) - goto out; - new_weight_ptr = ¤t_weight; - } else if (!strcmp(kbuf, "capacity_weight")) { - char *endp; - *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10); - if (endp == tmp) - goto out; - new_entitled_ptr = ¤t_entitled; - } else - goto out; - - /* Get our current parameters */ - retval = h_get_ppp(¤t_entitled, &dummy, &dummy, &resource); - if (retval) { - retval = -EIO; - goto out; - } - - current_weight = (resource >> 5 * 8) & 0xFF; - - pr_debug("%s: current_entitled = %lu, current_weight = %lu\n", - __FUNCTION__, current_entitled, current_weight); - - pr_debug("%s: new_entitled = %lu, new_weight = %lu\n", - __FUNCTION__, *new_entitled_ptr, *new_weight_ptr); - - retval = plpar_hcall_norets(H_SET_PPP, *new_entitled_ptr, - *new_weight_ptr); - - if (retval == H_Success || retval == H_Constrained) { - retval = count; - } else if (retval == H_Busy) { - retval = -EBUSY; - } else if (retval == H_Hardware) { - retval = -EIO; - } else if (retval == H_Parameter) { - retval = -EINVAL; - } else { - printk(KERN_WARNING "%s: received unknown hv return code %ld", - __FUNCTION__, retval); - retval = -EIO; - } - - out: - kfree(kbuf); - return retval; -} - -#endif /* CONFIG_PPC_PSERIES */ - -static int lparcfg_open(struct inode *inode, struct file *file) -{ - return single_open(file, lparcfg_data, NULL); -} - -struct file_operations lparcfg_fops = { - .owner = THIS_MODULE, - .read = seq_read, - .open = lparcfg_open, - .release = single_release, -}; - -int __init lparcfg_init(void) -{ - struct proc_dir_entry *ent; - mode_t mode = S_IRUSR | S_IRGRP | S_IROTH; - - /* Allow writing if we have FW_FEATURE_SPLPAR */ - if (firmware_has_feature(FW_FEATURE_SPLPAR)) { - lparcfg_fops.write = lparcfg_write; - mode |= S_IWUSR; - } - - ent = create_proc_entry("ppc64/lparcfg", mode, NULL); - if (ent) { - ent->proc_fops = &lparcfg_fops; - ent->data = kmalloc(LPARCFG_BUFF_SIZE, GFP_KERNEL); - if (!ent->data) { - printk(KERN_ERR - "Failed to allocate buffer for lparcfg\n"); - remove_proc_entry("lparcfg", ent->parent); - return -ENOMEM; - } - } else { - printk(KERN_ERR "Failed to create ppc64/lparcfg\n"); - return -EIO; - } - - proc_ppc64_lparcfg = ent; - return 0; -} - -void __exit lparcfg_cleanup(void) -{ - if (proc_ppc64_lparcfg) { - kfree(proc_ppc64_lparcfg->data); - remove_proc_entry("lparcfg", proc_ppc64_lparcfg->parent); - } -} - -module_init(lparcfg_init); -module_exit(lparcfg_cleanup); -MODULE_DESCRIPTION("Interface for LPAR configuration data"); -MODULE_AUTHOR("Dave Engebretsen"); -MODULE_LICENSE("GPL"); |