[PATCH] powerpc/pseries: Move lparcfg.c to platforms/pseries
Benjamin Herrenschmidt
benh at kernel.crashing.org
Wed Aug 28 13:51:13 EST 2013
This file is entirely pseries specific nowadays, so move it out
of arch/powerpc/kernel where it doesn't belong anymore.
Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
---
arch/powerpc/kernel/Makefile | 1 -
arch/powerpc/kernel/lparcfg.c | 710 -------------------------------
arch/powerpc/platforms/pseries/Makefile | 1 +
arch/powerpc/platforms/pseries/lparcfg.c | 710 +++++++++++++++++++++++++++++++
4 files changed, 711 insertions(+), 711 deletions(-)
delete mode 100644 arch/powerpc/kernel/lparcfg.c
create mode 100644 arch/powerpc/platforms/pseries/lparcfg.c
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 5b280f5..445cb6e 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -55,7 +55,6 @@ obj-$(CONFIG_PPC_RTAS) += rtas.o rtas-rtc.o $(rtaspci-y-y)
obj-$(CONFIG_PPC_RTAS_DAEMON) += rtasd.o
obj-$(CONFIG_RTAS_FLASH) += rtas_flash.o
obj-$(CONFIG_RTAS_PROC) += rtas-proc.o
-obj-$(CONFIG_LPARCFG) += lparcfg.o
obj-$(CONFIG_IBMVIO) += vio.o
obj-$(CONFIG_IBMEBUS) += ibmebus.o
obj-$(CONFIG_EEH) += eeh.o eeh_pe.o eeh_dev.o eeh_cache.o \
diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
deleted file mode 100644
index e738007..0000000
--- a/arch/powerpc/kernel/lparcfg.c
+++ /dev/null
@@ -1,710 +0,0 @@
-/*
- * PowerPC64 LPAR Configuration Information Driver
- *
- * Dave Engebretsen engebret at us.ibm.com
- * Copyright (c) 2003 Dave Engebretsen
- * Will Schmidt willschm at 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 at 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/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 <linux/slab.h>
-#include <asm/uaccess.h>
-#include <asm/lppaca.h>
-#include <asm/hvcall.h>
-#include <asm/firmware.h>
-#include <asm/rtas.h>
-#include <asm/time.h>
-#include <asm/prom.h>
-#include <asm/vdso_datapage.h>
-#include <asm/vio.h>
-#include <asm/mmu.h>
-#include <asm/machdep.h>
-
-
-/*
- * This isn't a module but we expose that to userspace
- * via /proc so leave the definitions here
- */
-#define MODULE_VERS "1.9"
-#define MODULE_NAME "lparcfg"
-
-/* #define LPARCFG_DEBUG */
-
-/*
- * 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;
-
- for_each_possible_cpu(cpu) {
- struct cpu_usage *cu;
-
- cu = &per_cpu(cpu_usage_array, cpu);
- sum_purr += cu->current_tb;
- }
- return sum_purr;
-}
-
-/*
- * Methods used to fetch LPAR data when running on a pSeries platform.
- */
-
-struct hvcall_ppp_data {
- u64 entitlement;
- u64 unallocated_entitlement;
- u16 group_num;
- u16 pool_num;
- u8 capped;
- u8 weight;
- u8 unallocated_weight;
- u16 active_procs_in_pool;
- u16 active_system_procs;
- u16 phys_platform_procs;
- u32 max_proc_cap_avail;
- u32 entitled_proc_cap_avail;
-};
-
-/*
- * 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.
- * R8 (QQQQRRRRRRSSSSSS). if ibm,partition-performance-parameters-level >= 1
- * XXXX - Physical platform procs allocated to virtualization.
- * XXXXXX - Max procs capacity % available to the partitions pool.
- * XXXXXX - Entitled procs capacity % available to the
- * partitions pool.
- */
-static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data)
-{
- unsigned long rc;
- unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
-
- rc = plpar_hcall9(H_GET_PPP, retbuf);
-
- ppp_data->entitlement = retbuf[0];
- ppp_data->unallocated_entitlement = retbuf[1];
-
- ppp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff;
- ppp_data->pool_num = retbuf[2] & 0xffff;
-
- ppp_data->capped = (retbuf[3] >> 6 * 8) & 0x01;
- ppp_data->weight = (retbuf[3] >> 5 * 8) & 0xff;
- ppp_data->unallocated_weight = (retbuf[3] >> 4 * 8) & 0xff;
- ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff;
- ppp_data->active_system_procs = retbuf[3] & 0xffff;
-
- ppp_data->phys_platform_procs = retbuf[4] >> 6 * 8;
- ppp_data->max_proc_cap_avail = (retbuf[4] >> 3 * 8) & 0xffffff;
- ppp_data->entitled_proc_cap_avail = retbuf[4] & 0xffffff;
-
- return rc;
-}
-
-static unsigned h_pic(unsigned long *pool_idle_time,
- unsigned long *num_procs)
-{
- unsigned long rc;
- unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
-
- rc = plpar_hcall(H_PIC, retbuf);
-
- *pool_idle_time = retbuf[0];
- *num_procs = retbuf[1];
-
- return rc;
-}
-
-/*
- * parse_ppp_data
- * Parse out the data returned from h_get_ppp and h_pic
- */
-static void parse_ppp_data(struct seq_file *m)
-{
- struct hvcall_ppp_data ppp_data;
- struct device_node *root;
- const int *perf_level;
- int rc;
-
- rc = h_get_ppp(&ppp_data);
- if (rc)
- return;
-
- seq_printf(m, "partition_entitled_capacity=%lld\n",
- ppp_data.entitlement);
- seq_printf(m, "group=%d\n", ppp_data.group_num);
- seq_printf(m, "system_active_processors=%d\n",
- ppp_data.active_system_procs);
-
- /* pool related entries are appropriate for shared configs */
- if (lppaca_shared_proc(get_lppaca())) {
- unsigned long pool_idle_time, pool_procs;
-
- seq_printf(m, "pool=%d\n", ppp_data.pool_num);
-
- /* report pool_capacity in percentage */
- seq_printf(m, "pool_capacity=%d\n",
- ppp_data.active_procs_in_pool * 100);
-
- h_pic(&pool_idle_time, &pool_procs);
- 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=%d\n",
- ppp_data.unallocated_weight);
- seq_printf(m, "capacity_weight=%d\n", ppp_data.weight);
- seq_printf(m, "capped=%d\n", ppp_data.capped);
- seq_printf(m, "unallocated_capacity=%lld\n",
- ppp_data.unallocated_entitlement);
-
- /* The last bits of information returned from h_get_ppp are only
- * valid if the ibm,partition-performance-parameters-level
- * property is >= 1.
- */
- root = of_find_node_by_path("/");
- if (root) {
- perf_level = of_get_property(root,
- "ibm,partition-performance-parameters-level",
- NULL);
- if (perf_level && (*perf_level >= 1)) {
- seq_printf(m,
- "physical_procs_allocated_to_virtualization=%d\n",
- ppp_data.phys_platform_procs);
- seq_printf(m, "max_proc_capacity_available=%d\n",
- ppp_data.max_proc_cap_avail);
- seq_printf(m, "entitled_proc_capacity_available=%d\n",
- ppp_data.entitled_proc_cap_avail);
- }
-
- of_node_put(root);
- }
-}
-
-/**
- * parse_mpp_data
- * Parse out data returned from h_get_mpp
- */
-static void parse_mpp_data(struct seq_file *m)
-{
- struct hvcall_mpp_data mpp_data;
- int rc;
-
- rc = h_get_mpp(&mpp_data);
- if (rc)
- return;
-
- seq_printf(m, "entitled_memory=%ld\n", mpp_data.entitled_mem);
-
- if (mpp_data.mapped_mem != -1)
- seq_printf(m, "mapped_entitled_memory=%ld\n",
- mpp_data.mapped_mem);
-
- seq_printf(m, "entitled_memory_group_number=%d\n", mpp_data.group_num);
- seq_printf(m, "entitled_memory_pool_number=%d\n", mpp_data.pool_num);
-
- seq_printf(m, "entitled_memory_weight=%d\n", mpp_data.mem_weight);
- seq_printf(m, "unallocated_entitled_memory_weight=%d\n",
- mpp_data.unallocated_mem_weight);
- seq_printf(m, "unallocated_io_mapping_entitlement=%ld\n",
- mpp_data.unallocated_entitlement);
-
- if (mpp_data.pool_size != -1)
- seq_printf(m, "entitled_memory_pool_size=%ld bytes\n",
- mpp_data.pool_size);
-
- seq_printf(m, "entitled_memory_loan_request=%ld\n",
- mpp_data.loan_request);
-
- seq_printf(m, "backing_memory=%ld bytes\n", mpp_data.backing_mem);
-}
-
-/**
- * parse_mpp_x_data
- * Parse out data returned from h_get_mpp_x
- */
-static void parse_mpp_x_data(struct seq_file *m)
-{
- struct hvcall_mpp_x_data mpp_x_data;
-
- if (!firmware_has_feature(FW_FEATURE_XCMO))
- return;
- if (h_get_mpp_x(&mpp_x_data))
- return;
-
- seq_printf(m, "coalesced_bytes=%ld\n", mpp_x_data.coalesced_bytes);
-
- if (mpp_x_data.pool_coalesced_bytes)
- seq_printf(m, "pool_coalesced_bytes=%ld\n",
- mpp_x_data.pool_coalesced_bytes);
- if (mpp_x_data.pool_purr_cycles)
- seq_printf(m, "coalesce_pool_purr=%ld\n", mpp_x_data.pool_purr_cycles);
- if (mpp_x_data.pool_spurr_cycles)
- seq_printf(m, "coalesce_pool_spurr=%ld\n", mpp_x_data.pool_spurr_cycles);
-}
-
-#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;
-
- unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
- if (!local_buffer) {
- printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
- __FILE__, __func__, __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),
- RTAS_DATA_BUF_SIZE);
- memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH);
- local_buffer[SPLPAR_MAXLENGTH - 1] = '\0';
- spin_unlock(&rtas_data_buf_lock);
-
- if (call_status != 0) {
- printk(KERN_INFO
- "%s %s Error calling get-system-parameter (0x%x)\n",
- __FILE__, __func__, call_status);
- } else {
- int splpar_strlen;
- int idx, w_idx;
- char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
- if (!workbuffer) {
- printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
- __FILE__, __func__, __LINE__);
- kfree(local_buffer);
- return;
- }
-#ifdef LPARCFG_DEBUG
- printk(KERN_INFO "success calling get-system-parameter\n");
-#endif
- splpar_strlen = local_buffer[0] * 256 + local_buffer[1];
- local_buffer += 2; /* step over strlen value */
-
- 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);
-}
-
-/* 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 void pseries_cmo_data(struct seq_file *m)
-{
- int cpu;
- unsigned long cmo_faults = 0;
- unsigned long cmo_fault_time = 0;
-
- seq_printf(m, "cmo_enabled=%d\n", firmware_has_feature(FW_FEATURE_CMO));
-
- if (!firmware_has_feature(FW_FEATURE_CMO))
- return;
-
- for_each_possible_cpu(cpu) {
- cmo_faults += be64_to_cpu(lppaca_of(cpu).cmo_faults);
- cmo_fault_time += be64_to_cpu(lppaca_of(cpu).cmo_fault_time);
- }
-
- seq_printf(m, "cmo_faults=%lu\n", cmo_faults);
- seq_printf(m, "cmo_fault_time_usec=%lu\n",
- cmo_fault_time / tb_ticks_per_usec);
- seq_printf(m, "cmo_primary_psp=%d\n", cmo_get_primary_psp());
- seq_printf(m, "cmo_secondary_psp=%d\n", cmo_get_secondary_psp());
- seq_printf(m, "cmo_page_size=%lu\n", cmo_get_page_size());
-}
-
-static void splpar_dispatch_data(struct seq_file *m)
-{
- int cpu;
- unsigned long dispatches = 0;
- unsigned long dispatch_dispersions = 0;
-
- for_each_possible_cpu(cpu) {
- dispatches += be32_to_cpu(lppaca_of(cpu).yield_count);
- dispatch_dispersions +=
- be32_to_cpu(lppaca_of(cpu).dispersion_count);
- }
-
- seq_printf(m, "dispatches=%lu\n", dispatches);
- seq_printf(m, "dispatch_dispersions=%lu\n", dispatch_dispersions);
-}
-
-static void parse_em_data(struct seq_file *m)
-{
- unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
-
- if (firmware_has_feature(FW_FEATURE_LPAR) &&
- plpar_hcall(H_GET_EM_PARMS, retbuf) == H_SUCCESS)
- seq_printf(m, "power_mode_data=%016lx\n", retbuf[0]);
-}
-
-static int pseries_lparcfg_data(struct seq_file *m, void *v)
-{
- int partition_potential_processors;
- int partition_active_processors;
- struct device_node *rtas_node;
- const int *lrdrp = NULL;
-
- rtas_node = of_find_node_by_path("/rtas");
- if (rtas_node)
- lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL);
-
- if (lrdrp == NULL) {
- partition_potential_processors = vdso_data->processorCount;
- } else {
- partition_potential_processors = *(lrdrp + 4);
- }
- of_node_put(rtas_node);
-
- partition_active_processors = lparcfg_count_active_processors();
-
- if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
- /* this call handles the ibm,get-system-parameter contents */
- parse_system_parameter_string(m);
- parse_ppp_data(m);
- parse_mpp_data(m);
- parse_mpp_x_data(m);
- pseries_cmo_data(m);
- splpar_dispatch_data(m);
-
- seq_printf(m, "purr=%ld\n", get_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",
- lppaca_shared_proc(get_lppaca()));
-
- seq_printf(m, "slb_size=%d\n", mmu_slb_size);
-
- parse_em_data(m);
-
- return 0;
-}
-
-static ssize_t update_ppp(u64 *entitlement, u8 *weight)
-{
- struct hvcall_ppp_data ppp_data;
- u8 new_weight;
- u64 new_entitled;
- ssize_t retval;
-
- /* Get our current parameters */
- retval = h_get_ppp(&ppp_data);
- if (retval)
- return retval;
-
- if (entitlement) {
- new_weight = ppp_data.weight;
- new_entitled = *entitlement;
- } else if (weight) {
- new_weight = *weight;
- new_entitled = ppp_data.entitlement;
- } else
- return -EINVAL;
-
- pr_debug("%s: current_entitled = %llu, current_weight = %u\n",
- __func__, ppp_data.entitlement, ppp_data.weight);
-
- pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
- __func__, new_entitled, new_weight);
-
- retval = plpar_hcall_norets(H_SET_PPP, new_entitled, new_weight);
- return retval;
-}
-
-/**
- * update_mpp
- *
- * Update the memory entitlement and weight for the partition. Caller must
- * specify either a new entitlement or weight, not both, to be updated
- * since the h_set_mpp call takes both entitlement and weight as parameters.
- */
-static ssize_t update_mpp(u64 *entitlement, u8 *weight)
-{
- struct hvcall_mpp_data mpp_data;
- u64 new_entitled;
- u8 new_weight;
- ssize_t rc;
-
- if (entitlement) {
- /* Check with vio to ensure the new memory entitlement
- * can be handled.
- */
- rc = vio_cmo_entitlement_update(*entitlement);
- if (rc)
- return rc;
- }
-
- rc = h_get_mpp(&mpp_data);
- if (rc)
- return rc;
-
- if (entitlement) {
- new_weight = mpp_data.mem_weight;
- new_entitled = *entitlement;
- } else if (weight) {
- new_weight = *weight;
- new_entitled = mpp_data.entitled_mem;
- } else
- return -EINVAL;
-
- pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
- __func__, mpp_data.entitled_mem, mpp_data.mem_weight);
-
- pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
- __func__, new_entitled, new_weight);
-
- rc = plpar_hcall_norets(H_SET_MPP, new_entitled, new_weight);
- return rc;
-}
-
-/*
- * 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)
-{
- int kbuf_sz = 64;
- char kbuf[kbuf_sz];
- char *tmp;
- u64 new_entitled, *new_entitled_ptr = &new_entitled;
- u8 new_weight, *new_weight_ptr = &new_weight;
- ssize_t retval;
-
- if (!firmware_has_feature(FW_FEATURE_SPLPAR))
- return -EINVAL;
-
- if (count > kbuf_sz)
- return -EINVAL;
-
- if (copy_from_user(kbuf, buf, count))
- return -EFAULT;
-
- kbuf[count - 1] = '\0';
- tmp = strchr(kbuf, '=');
- if (!tmp)
- return -EINVAL;
-
- *tmp++ = '\0';
-
- if (!strcmp(kbuf, "partition_entitled_capacity")) {
- char *endp;
- *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
- if (endp == tmp)
- return -EINVAL;
-
- retval = update_ppp(new_entitled_ptr, NULL);
- } else if (!strcmp(kbuf, "capacity_weight")) {
- char *endp;
- *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
- if (endp == tmp)
- return -EINVAL;
-
- retval = update_ppp(NULL, new_weight_ptr);
- } else if (!strcmp(kbuf, "entitled_memory")) {
- char *endp;
- *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
- if (endp == tmp)
- return -EINVAL;
-
- retval = update_mpp(new_entitled_ptr, NULL);
- } else if (!strcmp(kbuf, "entitled_memory_weight")) {
- char *endp;
- *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
- if (endp == tmp)
- return -EINVAL;
-
- retval = update_mpp(NULL, new_weight_ptr);
- } else
- return -EINVAL;
-
- 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;
- }
-
- return retval;
-}
-
-static int lparcfg_data(struct seq_file *m, void *v)
-{
- struct device_node *rootdn;
- const char *model = "";
- const char *system_id = "";
- const char *tmp;
- const unsigned int *lp_index_ptr;
- unsigned int lp_index = 0;
-
- seq_printf(m, "%s %s\n", MODULE_NAME, MODULE_VERS);
-
- rootdn = of_find_node_by_path("/");
- if (rootdn) {
- tmp = of_get_property(rootdn, "model", NULL);
- if (tmp)
- model = tmp;
- tmp = of_get_property(rootdn, "system-id", NULL);
- if (tmp)
- system_id = tmp;
- lp_index_ptr = of_get_property(rootdn, "ibm,partition-no",
- NULL);
- if (lp_index_ptr)
- lp_index = *lp_index_ptr;
- of_node_put(rootdn);
- }
- 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);
-
- return pseries_lparcfg_data(m, v);
-}
-
-static int lparcfg_open(struct inode *inode, struct file *file)
-{
- return single_open(file, lparcfg_data, NULL);
-}
-
-static const struct file_operations lparcfg_fops = {
- .read = seq_read,
- .write = lparcfg_write,
- .open = lparcfg_open,
- .release = single_release,
- .llseek = seq_lseek,
-};
-
-static int __init lparcfg_init(void)
-{
- umode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
-
- /* Allow writing if we have FW_FEATURE_SPLPAR */
- if (firmware_has_feature(FW_FEATURE_SPLPAR))
- mode |= S_IWUSR;
-
- if (!proc_create("powerpc/lparcfg", mode, NULL, &lparcfg_fops)) {
- printk(KERN_ERR "Failed to create powerpc/lparcfg\n");
- return -EIO;
- }
- return 0;
-}
-machine_device_initcall(pseries, lparcfg_init);
diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile
index 8ae0103..6c61ec5 100644
--- a/arch/powerpc/platforms/pseries/Makefile
+++ b/arch/powerpc/platforms/pseries/Makefile
@@ -22,6 +22,7 @@ obj-$(CONFIG_CMM) += cmm.o
obj-$(CONFIG_DTL) += dtl.o
obj-$(CONFIG_IO_EVENT_IRQ) += io_event_irq.o
obj-$(CONFIG_PSERIES_IDLE) += processor_idle.o
+obj-$(CONFIG_LPARCFG) += lparcfg.o
ifeq ($(CONFIG_PPC_PSERIES),y)
obj-$(CONFIG_SUSPEND) += suspend.o
diff --git a/arch/powerpc/platforms/pseries/lparcfg.c b/arch/powerpc/platforms/pseries/lparcfg.c
new file mode 100644
index 0000000..e738007
--- /dev/null
+++ b/arch/powerpc/platforms/pseries/lparcfg.c
@@ -0,0 +1,710 @@
+/*
+ * PowerPC64 LPAR Configuration Information Driver
+ *
+ * Dave Engebretsen engebret at us.ibm.com
+ * Copyright (c) 2003 Dave Engebretsen
+ * Will Schmidt willschm at 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 at 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/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 <linux/slab.h>
+#include <asm/uaccess.h>
+#include <asm/lppaca.h>
+#include <asm/hvcall.h>
+#include <asm/firmware.h>
+#include <asm/rtas.h>
+#include <asm/time.h>
+#include <asm/prom.h>
+#include <asm/vdso_datapage.h>
+#include <asm/vio.h>
+#include <asm/mmu.h>
+#include <asm/machdep.h>
+
+
+/*
+ * This isn't a module but we expose that to userspace
+ * via /proc so leave the definitions here
+ */
+#define MODULE_VERS "1.9"
+#define MODULE_NAME "lparcfg"
+
+/* #define LPARCFG_DEBUG */
+
+/*
+ * 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;
+
+ for_each_possible_cpu(cpu) {
+ struct cpu_usage *cu;
+
+ cu = &per_cpu(cpu_usage_array, cpu);
+ sum_purr += cu->current_tb;
+ }
+ return sum_purr;
+}
+
+/*
+ * Methods used to fetch LPAR data when running on a pSeries platform.
+ */
+
+struct hvcall_ppp_data {
+ u64 entitlement;
+ u64 unallocated_entitlement;
+ u16 group_num;
+ u16 pool_num;
+ u8 capped;
+ u8 weight;
+ u8 unallocated_weight;
+ u16 active_procs_in_pool;
+ u16 active_system_procs;
+ u16 phys_platform_procs;
+ u32 max_proc_cap_avail;
+ u32 entitled_proc_cap_avail;
+};
+
+/*
+ * 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.
+ * R8 (QQQQRRRRRRSSSSSS). if ibm,partition-performance-parameters-level >= 1
+ * XXXX - Physical platform procs allocated to virtualization.
+ * XXXXXX - Max procs capacity % available to the partitions pool.
+ * XXXXXX - Entitled procs capacity % available to the
+ * partitions pool.
+ */
+static unsigned int h_get_ppp(struct hvcall_ppp_data *ppp_data)
+{
+ unsigned long rc;
+ unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
+
+ rc = plpar_hcall9(H_GET_PPP, retbuf);
+
+ ppp_data->entitlement = retbuf[0];
+ ppp_data->unallocated_entitlement = retbuf[1];
+
+ ppp_data->group_num = (retbuf[2] >> 2 * 8) & 0xffff;
+ ppp_data->pool_num = retbuf[2] & 0xffff;
+
+ ppp_data->capped = (retbuf[3] >> 6 * 8) & 0x01;
+ ppp_data->weight = (retbuf[3] >> 5 * 8) & 0xff;
+ ppp_data->unallocated_weight = (retbuf[3] >> 4 * 8) & 0xff;
+ ppp_data->active_procs_in_pool = (retbuf[3] >> 2 * 8) & 0xffff;
+ ppp_data->active_system_procs = retbuf[3] & 0xffff;
+
+ ppp_data->phys_platform_procs = retbuf[4] >> 6 * 8;
+ ppp_data->max_proc_cap_avail = (retbuf[4] >> 3 * 8) & 0xffffff;
+ ppp_data->entitled_proc_cap_avail = retbuf[4] & 0xffffff;
+
+ return rc;
+}
+
+static unsigned h_pic(unsigned long *pool_idle_time,
+ unsigned long *num_procs)
+{
+ unsigned long rc;
+ unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+ rc = plpar_hcall(H_PIC, retbuf);
+
+ *pool_idle_time = retbuf[0];
+ *num_procs = retbuf[1];
+
+ return rc;
+}
+
+/*
+ * parse_ppp_data
+ * Parse out the data returned from h_get_ppp and h_pic
+ */
+static void parse_ppp_data(struct seq_file *m)
+{
+ struct hvcall_ppp_data ppp_data;
+ struct device_node *root;
+ const int *perf_level;
+ int rc;
+
+ rc = h_get_ppp(&ppp_data);
+ if (rc)
+ return;
+
+ seq_printf(m, "partition_entitled_capacity=%lld\n",
+ ppp_data.entitlement);
+ seq_printf(m, "group=%d\n", ppp_data.group_num);
+ seq_printf(m, "system_active_processors=%d\n",
+ ppp_data.active_system_procs);
+
+ /* pool related entries are appropriate for shared configs */
+ if (lppaca_shared_proc(get_lppaca())) {
+ unsigned long pool_idle_time, pool_procs;
+
+ seq_printf(m, "pool=%d\n", ppp_data.pool_num);
+
+ /* report pool_capacity in percentage */
+ seq_printf(m, "pool_capacity=%d\n",
+ ppp_data.active_procs_in_pool * 100);
+
+ h_pic(&pool_idle_time, &pool_procs);
+ 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=%d\n",
+ ppp_data.unallocated_weight);
+ seq_printf(m, "capacity_weight=%d\n", ppp_data.weight);
+ seq_printf(m, "capped=%d\n", ppp_data.capped);
+ seq_printf(m, "unallocated_capacity=%lld\n",
+ ppp_data.unallocated_entitlement);
+
+ /* The last bits of information returned from h_get_ppp are only
+ * valid if the ibm,partition-performance-parameters-level
+ * property is >= 1.
+ */
+ root = of_find_node_by_path("/");
+ if (root) {
+ perf_level = of_get_property(root,
+ "ibm,partition-performance-parameters-level",
+ NULL);
+ if (perf_level && (*perf_level >= 1)) {
+ seq_printf(m,
+ "physical_procs_allocated_to_virtualization=%d\n",
+ ppp_data.phys_platform_procs);
+ seq_printf(m, "max_proc_capacity_available=%d\n",
+ ppp_data.max_proc_cap_avail);
+ seq_printf(m, "entitled_proc_capacity_available=%d\n",
+ ppp_data.entitled_proc_cap_avail);
+ }
+
+ of_node_put(root);
+ }
+}
+
+/**
+ * parse_mpp_data
+ * Parse out data returned from h_get_mpp
+ */
+static void parse_mpp_data(struct seq_file *m)
+{
+ struct hvcall_mpp_data mpp_data;
+ int rc;
+
+ rc = h_get_mpp(&mpp_data);
+ if (rc)
+ return;
+
+ seq_printf(m, "entitled_memory=%ld\n", mpp_data.entitled_mem);
+
+ if (mpp_data.mapped_mem != -1)
+ seq_printf(m, "mapped_entitled_memory=%ld\n",
+ mpp_data.mapped_mem);
+
+ seq_printf(m, "entitled_memory_group_number=%d\n", mpp_data.group_num);
+ seq_printf(m, "entitled_memory_pool_number=%d\n", mpp_data.pool_num);
+
+ seq_printf(m, "entitled_memory_weight=%d\n", mpp_data.mem_weight);
+ seq_printf(m, "unallocated_entitled_memory_weight=%d\n",
+ mpp_data.unallocated_mem_weight);
+ seq_printf(m, "unallocated_io_mapping_entitlement=%ld\n",
+ mpp_data.unallocated_entitlement);
+
+ if (mpp_data.pool_size != -1)
+ seq_printf(m, "entitled_memory_pool_size=%ld bytes\n",
+ mpp_data.pool_size);
+
+ seq_printf(m, "entitled_memory_loan_request=%ld\n",
+ mpp_data.loan_request);
+
+ seq_printf(m, "backing_memory=%ld bytes\n", mpp_data.backing_mem);
+}
+
+/**
+ * parse_mpp_x_data
+ * Parse out data returned from h_get_mpp_x
+ */
+static void parse_mpp_x_data(struct seq_file *m)
+{
+ struct hvcall_mpp_x_data mpp_x_data;
+
+ if (!firmware_has_feature(FW_FEATURE_XCMO))
+ return;
+ if (h_get_mpp_x(&mpp_x_data))
+ return;
+
+ seq_printf(m, "coalesced_bytes=%ld\n", mpp_x_data.coalesced_bytes);
+
+ if (mpp_x_data.pool_coalesced_bytes)
+ seq_printf(m, "pool_coalesced_bytes=%ld\n",
+ mpp_x_data.pool_coalesced_bytes);
+ if (mpp_x_data.pool_purr_cycles)
+ seq_printf(m, "coalesce_pool_purr=%ld\n", mpp_x_data.pool_purr_cycles);
+ if (mpp_x_data.pool_spurr_cycles)
+ seq_printf(m, "coalesce_pool_spurr=%ld\n", mpp_x_data.pool_spurr_cycles);
+}
+
+#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;
+
+ unsigned char *local_buffer = kmalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
+ if (!local_buffer) {
+ printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
+ __FILE__, __func__, __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),
+ RTAS_DATA_BUF_SIZE);
+ memcpy(local_buffer, rtas_data_buf, SPLPAR_MAXLENGTH);
+ local_buffer[SPLPAR_MAXLENGTH - 1] = '\0';
+ spin_unlock(&rtas_data_buf_lock);
+
+ if (call_status != 0) {
+ printk(KERN_INFO
+ "%s %s Error calling get-system-parameter (0x%x)\n",
+ __FILE__, __func__, call_status);
+ } else {
+ int splpar_strlen;
+ int idx, w_idx;
+ char *workbuffer = kzalloc(SPLPAR_MAXLENGTH, GFP_KERNEL);
+ if (!workbuffer) {
+ printk(KERN_ERR "%s %s kmalloc failure at line %d\n",
+ __FILE__, __func__, __LINE__);
+ kfree(local_buffer);
+ return;
+ }
+#ifdef LPARCFG_DEBUG
+ printk(KERN_INFO "success calling get-system-parameter\n");
+#endif
+ splpar_strlen = local_buffer[0] * 256 + local_buffer[1];
+ local_buffer += 2; /* step over strlen value */
+
+ 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);
+}
+
+/* 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 void pseries_cmo_data(struct seq_file *m)
+{
+ int cpu;
+ unsigned long cmo_faults = 0;
+ unsigned long cmo_fault_time = 0;
+
+ seq_printf(m, "cmo_enabled=%d\n", firmware_has_feature(FW_FEATURE_CMO));
+
+ if (!firmware_has_feature(FW_FEATURE_CMO))
+ return;
+
+ for_each_possible_cpu(cpu) {
+ cmo_faults += be64_to_cpu(lppaca_of(cpu).cmo_faults);
+ cmo_fault_time += be64_to_cpu(lppaca_of(cpu).cmo_fault_time);
+ }
+
+ seq_printf(m, "cmo_faults=%lu\n", cmo_faults);
+ seq_printf(m, "cmo_fault_time_usec=%lu\n",
+ cmo_fault_time / tb_ticks_per_usec);
+ seq_printf(m, "cmo_primary_psp=%d\n", cmo_get_primary_psp());
+ seq_printf(m, "cmo_secondary_psp=%d\n", cmo_get_secondary_psp());
+ seq_printf(m, "cmo_page_size=%lu\n", cmo_get_page_size());
+}
+
+static void splpar_dispatch_data(struct seq_file *m)
+{
+ int cpu;
+ unsigned long dispatches = 0;
+ unsigned long dispatch_dispersions = 0;
+
+ for_each_possible_cpu(cpu) {
+ dispatches += be32_to_cpu(lppaca_of(cpu).yield_count);
+ dispatch_dispersions +=
+ be32_to_cpu(lppaca_of(cpu).dispersion_count);
+ }
+
+ seq_printf(m, "dispatches=%lu\n", dispatches);
+ seq_printf(m, "dispatch_dispersions=%lu\n", dispatch_dispersions);
+}
+
+static void parse_em_data(struct seq_file *m)
+{
+ unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
+
+ if (firmware_has_feature(FW_FEATURE_LPAR) &&
+ plpar_hcall(H_GET_EM_PARMS, retbuf) == H_SUCCESS)
+ seq_printf(m, "power_mode_data=%016lx\n", retbuf[0]);
+}
+
+static int pseries_lparcfg_data(struct seq_file *m, void *v)
+{
+ int partition_potential_processors;
+ int partition_active_processors;
+ struct device_node *rtas_node;
+ const int *lrdrp = NULL;
+
+ rtas_node = of_find_node_by_path("/rtas");
+ if (rtas_node)
+ lrdrp = of_get_property(rtas_node, "ibm,lrdr-capacity", NULL);
+
+ if (lrdrp == NULL) {
+ partition_potential_processors = vdso_data->processorCount;
+ } else {
+ partition_potential_processors = *(lrdrp + 4);
+ }
+ of_node_put(rtas_node);
+
+ partition_active_processors = lparcfg_count_active_processors();
+
+ if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
+ /* this call handles the ibm,get-system-parameter contents */
+ parse_system_parameter_string(m);
+ parse_ppp_data(m);
+ parse_mpp_data(m);
+ parse_mpp_x_data(m);
+ pseries_cmo_data(m);
+ splpar_dispatch_data(m);
+
+ seq_printf(m, "purr=%ld\n", get_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",
+ lppaca_shared_proc(get_lppaca()));
+
+ seq_printf(m, "slb_size=%d\n", mmu_slb_size);
+
+ parse_em_data(m);
+
+ return 0;
+}
+
+static ssize_t update_ppp(u64 *entitlement, u8 *weight)
+{
+ struct hvcall_ppp_data ppp_data;
+ u8 new_weight;
+ u64 new_entitled;
+ ssize_t retval;
+
+ /* Get our current parameters */
+ retval = h_get_ppp(&ppp_data);
+ if (retval)
+ return retval;
+
+ if (entitlement) {
+ new_weight = ppp_data.weight;
+ new_entitled = *entitlement;
+ } else if (weight) {
+ new_weight = *weight;
+ new_entitled = ppp_data.entitlement;
+ } else
+ return -EINVAL;
+
+ pr_debug("%s: current_entitled = %llu, current_weight = %u\n",
+ __func__, ppp_data.entitlement, ppp_data.weight);
+
+ pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
+ __func__, new_entitled, new_weight);
+
+ retval = plpar_hcall_norets(H_SET_PPP, new_entitled, new_weight);
+ return retval;
+}
+
+/**
+ * update_mpp
+ *
+ * Update the memory entitlement and weight for the partition. Caller must
+ * specify either a new entitlement or weight, not both, to be updated
+ * since the h_set_mpp call takes both entitlement and weight as parameters.
+ */
+static ssize_t update_mpp(u64 *entitlement, u8 *weight)
+{
+ struct hvcall_mpp_data mpp_data;
+ u64 new_entitled;
+ u8 new_weight;
+ ssize_t rc;
+
+ if (entitlement) {
+ /* Check with vio to ensure the new memory entitlement
+ * can be handled.
+ */
+ rc = vio_cmo_entitlement_update(*entitlement);
+ if (rc)
+ return rc;
+ }
+
+ rc = h_get_mpp(&mpp_data);
+ if (rc)
+ return rc;
+
+ if (entitlement) {
+ new_weight = mpp_data.mem_weight;
+ new_entitled = *entitlement;
+ } else if (weight) {
+ new_weight = *weight;
+ new_entitled = mpp_data.entitled_mem;
+ } else
+ return -EINVAL;
+
+ pr_debug("%s: current_entitled = %lu, current_weight = %u\n",
+ __func__, mpp_data.entitled_mem, mpp_data.mem_weight);
+
+ pr_debug("%s: new_entitled = %llu, new_weight = %u\n",
+ __func__, new_entitled, new_weight);
+
+ rc = plpar_hcall_norets(H_SET_MPP, new_entitled, new_weight);
+ return rc;
+}
+
+/*
+ * 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)
+{
+ int kbuf_sz = 64;
+ char kbuf[kbuf_sz];
+ char *tmp;
+ u64 new_entitled, *new_entitled_ptr = &new_entitled;
+ u8 new_weight, *new_weight_ptr = &new_weight;
+ ssize_t retval;
+
+ if (!firmware_has_feature(FW_FEATURE_SPLPAR))
+ return -EINVAL;
+
+ if (count > kbuf_sz)
+ return -EINVAL;
+
+ if (copy_from_user(kbuf, buf, count))
+ return -EFAULT;
+
+ kbuf[count - 1] = '\0';
+ tmp = strchr(kbuf, '=');
+ if (!tmp)
+ return -EINVAL;
+
+ *tmp++ = '\0';
+
+ if (!strcmp(kbuf, "partition_entitled_capacity")) {
+ char *endp;
+ *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
+ if (endp == tmp)
+ return -EINVAL;
+
+ retval = update_ppp(new_entitled_ptr, NULL);
+ } else if (!strcmp(kbuf, "capacity_weight")) {
+ char *endp;
+ *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
+ if (endp == tmp)
+ return -EINVAL;
+
+ retval = update_ppp(NULL, new_weight_ptr);
+ } else if (!strcmp(kbuf, "entitled_memory")) {
+ char *endp;
+ *new_entitled_ptr = (u64) simple_strtoul(tmp, &endp, 10);
+ if (endp == tmp)
+ return -EINVAL;
+
+ retval = update_mpp(new_entitled_ptr, NULL);
+ } else if (!strcmp(kbuf, "entitled_memory_weight")) {
+ char *endp;
+ *new_weight_ptr = (u8) simple_strtoul(tmp, &endp, 10);
+ if (endp == tmp)
+ return -EINVAL;
+
+ retval = update_mpp(NULL, new_weight_ptr);
+ } else
+ return -EINVAL;
+
+ 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;
+ }
+
+ return retval;
+}
+
+static int lparcfg_data(struct seq_file *m, void *v)
+{
+ struct device_node *rootdn;
+ const char *model = "";
+ const char *system_id = "";
+ const char *tmp;
+ const unsigned int *lp_index_ptr;
+ unsigned int lp_index = 0;
+
+ seq_printf(m, "%s %s\n", MODULE_NAME, MODULE_VERS);
+
+ rootdn = of_find_node_by_path("/");
+ if (rootdn) {
+ tmp = of_get_property(rootdn, "model", NULL);
+ if (tmp)
+ model = tmp;
+ tmp = of_get_property(rootdn, "system-id", NULL);
+ if (tmp)
+ system_id = tmp;
+ lp_index_ptr = of_get_property(rootdn, "ibm,partition-no",
+ NULL);
+ if (lp_index_ptr)
+ lp_index = *lp_index_ptr;
+ of_node_put(rootdn);
+ }
+ 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);
+
+ return pseries_lparcfg_data(m, v);
+}
+
+static int lparcfg_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, lparcfg_data, NULL);
+}
+
+static const struct file_operations lparcfg_fops = {
+ .read = seq_read,
+ .write = lparcfg_write,
+ .open = lparcfg_open,
+ .release = single_release,
+ .llseek = seq_lseek,
+};
+
+static int __init lparcfg_init(void)
+{
+ umode_t mode = S_IRUSR | S_IRGRP | S_IROTH;
+
+ /* Allow writing if we have FW_FEATURE_SPLPAR */
+ if (firmware_has_feature(FW_FEATURE_SPLPAR))
+ mode |= S_IWUSR;
+
+ if (!proc_create("powerpc/lparcfg", mode, NULL, &lparcfg_fops)) {
+ printk(KERN_ERR "Failed to create powerpc/lparcfg\n");
+ return -EIO;
+ }
+ return 0;
+}
+machine_device_initcall(pseries, lparcfg_init);
More information about the Linuxppc-dev
mailing list