bootmem_debug [KNL] Enable bootmem allocator debug messages.
+ bert_disable [ACPI]
+ Disable BERT OS support on buggy BIOSes.
+
bttv.card= [HW,V4L] bttv (bt848 + bt878 based grabber cards)
bttv.radio= Most important insmod options are available as
kernel args too.
* published by the Free Software Foundation.
*/
+#include <linux/acpi.h>
+#include <linux/cpuidle.h>
+#include <linux/cpu_pm.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <asm/cpuidle.h>
#include <asm/cpu_ops.h>
-int __init arm_cpuidle_init(unsigned int cpu)
+int arm_cpuidle_init(unsigned int cpu)
{
int ret = -EOPNOTSUPP;
return cpu_ops[cpu]->cpu_suspend(index);
}
+
+#ifdef CONFIG_ACPI
+
+#include <acpi/processor.h>
+
+int acpi_processor_ffh_lpi_probe(unsigned int cpu)
+{
+ return arm_cpuidle_init(cpu);
+}
+
+int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi)
+{
+ return CPU_PM_CPU_IDLE_ENTER(arm_cpuidle_suspend, lpi->index);
+}
+#endif
bool
select THERMAL
+config ACPI_PROCESSOR_CSTATE
+ def_bool y
+ depends on IA64 || X86
+
config ACPI_PROCESSOR_IDLE
bool
select CPU_IDLE
config ACPI_PROCESSOR
tristate "Processor"
depends on X86 || IA64 || ARM64
- select ACPI_PROCESSOR_IDLE if X86 || IA64
+ select ACPI_PROCESSOR_IDLE
select ACPI_CPU_FREQ_PSS if X86 || IA64
default y
help
obj-$(CONFIG_ACPI_APEI_EINJ) += einj.o
obj-$(CONFIG_ACPI_APEI_ERST_DEBUG) += erst-dbg.o
-apei-y := apei-base.o hest.o erst.o
+apei-y := apei-base.o hest.o erst.o bert.o
/*
* apei-internal.h - ACPI Platform Error Interface internal
- * definations.
+ * definitions.
*/
#ifndef APEI_INTERNAL_H
--- /dev/null
+/*
+ * APEI Boot Error Record Table (BERT) support
+ *
+ * Copyright 2011 Intel Corp.
+ * Author: Huang Ying <ying.huang@intel.com>
+ *
+ * Under normal circumstances, when a hardware error occurs, the error
+ * handler receives control and processes the error. This gives OSPM a
+ * chance to process the error condition, report it, and optionally attempt
+ * recovery. In some cases, the system is unable to process an error.
+ * For example, system firmware or a management controller may choose to
+ * reset the system or the system might experience an uncontrolled crash
+ * or reset.The boot error source is used to report unhandled errors that
+ * occurred in a previous boot. This mechanism is described in the BERT
+ * table.
+ *
+ * For more information about BERT, please refer to ACPI Specification
+ * version 4.0, section 17.3.1
+ *
+ * This file is licensed under GPLv2.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <linux/io.h>
+
+#include "apei-internal.h"
+
+#undef pr_fmt
+#define pr_fmt(fmt) "BERT: " fmt
+
+static int bert_disable;
+
+static void __init bert_print_all(struct acpi_bert_region *region,
+ unsigned int region_len)
+{
+ struct acpi_hest_generic_status *estatus =
+ (struct acpi_hest_generic_status *)region;
+ int remain = region_len;
+ u32 estatus_len;
+
+ if (!estatus->block_status)
+ return;
+
+ while (remain > sizeof(struct acpi_bert_region)) {
+ if (cper_estatus_check(estatus)) {
+ pr_err(FW_BUG "Invalid error record.\n");
+ return;
+ }
+
+ estatus_len = cper_estatus_len(estatus);
+ if (remain < estatus_len) {
+ pr_err(FW_BUG "Truncated status block (length: %u).\n",
+ estatus_len);
+ return;
+ }
+
+ pr_info_once("Error records from previous boot:\n");
+
+ cper_estatus_print(KERN_INFO HW_ERR, estatus);
+
+ /*
+ * Because the boot error source is "one-time polled" type,
+ * clear Block Status of current Generic Error Status Block,
+ * once it's printed.
+ */
+ estatus->block_status = 0;
+
+ estatus = (void *)estatus + estatus_len;
+ /* No more error records. */
+ if (!estatus->block_status)
+ return;
+
+ remain -= estatus_len;
+ }
+}
+
+static int __init setup_bert_disable(char *str)
+{
+ bert_disable = 1;
+
+ return 0;
+}
+__setup("bert_disable", setup_bert_disable);
+
+static int __init bert_check_table(struct acpi_table_bert *bert_tab)
+{
+ if (bert_tab->header.length < sizeof(struct acpi_table_bert) ||
+ bert_tab->region_length < sizeof(struct acpi_bert_region))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int __init bert_init(void)
+{
+ struct acpi_bert_region *boot_error_region;
+ struct acpi_table_bert *bert_tab;
+ unsigned int region_len;
+ acpi_status status;
+ int rc = 0;
+
+ if (acpi_disabled)
+ return 0;
+
+ if (bert_disable) {
+ pr_info("Boot Error Record Table support is disabled.\n");
+ return 0;
+ }
+
+ status = acpi_get_table(ACPI_SIG_BERT, 0, (struct acpi_table_header **)&bert_tab);
+ if (status == AE_NOT_FOUND)
+ return 0;
+
+ if (ACPI_FAILURE(status)) {
+ pr_err("get table failed, %s.\n", acpi_format_exception(status));
+ return -EINVAL;
+ }
+
+ rc = bert_check_table(bert_tab);
+ if (rc) {
+ pr_err(FW_BUG "table invalid.\n");
+ return rc;
+ }
+
+ region_len = bert_tab->region_length;
+ if (!request_mem_region(bert_tab->address, region_len, "APEI BERT")) {
+ pr_err("Can't request iomem region <%016llx-%016llx>.\n",
+ (unsigned long long)bert_tab->address,
+ (unsigned long long)bert_tab->address + region_len - 1);
+ return -EIO;
+ }
+
+ boot_error_region = ioremap_cache(bert_tab->address, region_len);
+ if (boot_error_region) {
+ bert_print_all(boot_error_region, region_len);
+ iounmap(boot_error_region);
+ } else {
+ rc = -ENOMEM;
+ }
+
+ release_mem_region(bert_tab->address, region_len);
+
+ return rc;
+}
+
+late_initcall(bert_init);
#include "apei-internal.h"
-#define EINJ_PFX "EINJ: "
+#undef pr_fmt
+#define pr_fmt(fmt) "EINJ: " fmt
#define SPIN_UNIT 100 /* 100ns */
/* Firmware should respond within 1 milliseconds */
static int einj_timedout(u64 *t)
{
if ((s64)*t < SPIN_UNIT) {
- pr_warning(FW_WARN EINJ_PFX
- "Firmware does not respond in time\n");
+ pr_warning(FW_WARN "Firmware does not respond in time\n");
return 1;
}
*t -= SPIN_UNIT;
r = request_mem_region(trigger_paddr, sizeof(*trigger_tab),
"APEI EINJ Trigger Table");
if (!r) {
- pr_err(EINJ_PFX
- "Can not request [mem %#010llx-%#010llx] for Trigger table\n",
+ pr_err("Can not request [mem %#010llx-%#010llx] for Trigger table\n",
(unsigned long long)trigger_paddr,
(unsigned long long)trigger_paddr +
sizeof(*trigger_tab) - 1);
}
trigger_tab = ioremap_cache(trigger_paddr, sizeof(*trigger_tab));
if (!trigger_tab) {
- pr_err(EINJ_PFX "Failed to map trigger table!\n");
+ pr_err("Failed to map trigger table!\n");
goto out_rel_header;
}
rc = einj_check_trigger_header(trigger_tab);
if (rc) {
- pr_warning(FW_BUG EINJ_PFX
- "The trigger error action table is invalid\n");
+ pr_warning(FW_BUG "Invalid trigger error action table.\n");
goto out_rel_header;
}
table_size - sizeof(*trigger_tab),
"APEI EINJ Trigger Table");
if (!r) {
- pr_err(EINJ_PFX
-"Can not request [mem %#010llx-%#010llx] for Trigger Table Entry\n",
+ pr_err("Can not request [mem %#010llx-%#010llx] for Trigger Table Entry\n",
(unsigned long long)trigger_paddr + sizeof(*trigger_tab),
(unsigned long long)trigger_paddr + table_size - 1);
goto out_rel_header;
iounmap(trigger_tab);
trigger_tab = ioremap_cache(trigger_paddr, table_size);
if (!trigger_tab) {
- pr_err(EINJ_PFX "Failed to map trigger table!\n");
+ pr_err("Failed to map trigger table!\n");
goto out_rel_entry;
}
trigger_entry = (struct acpi_whea_header *)
struct dentry *fentry;
struct apei_exec_context ctx;
- if (acpi_disabled)
+ if (acpi_disabled) {
+ pr_warn("ACPI disabled.\n");
return -ENODEV;
+ }
status = acpi_get_table(ACPI_SIG_EINJ, 0,
(struct acpi_table_header **)&einj_tab);
- if (status == AE_NOT_FOUND)
+ if (status == AE_NOT_FOUND) {
+ pr_warn("EINJ table not found.\n");
return -ENODEV;
+ }
else if (ACPI_FAILURE(status)) {
- const char *msg = acpi_format_exception(status);
- pr_err(EINJ_PFX "Failed to get table, %s\n", msg);
+ pr_err("Failed to get EINJ table: %s\n",
+ acpi_format_exception(status));
return -EINVAL;
}
rc = einj_check_table(einj_tab);
if (rc) {
- pr_warning(FW_BUG EINJ_PFX "EINJ table is invalid\n");
+ pr_warn(FW_BUG "Invalid EINJ table.n");
return -EINVAL;
}
rc = -ENOMEM;
einj_debug_dir = debugfs_create_dir("einj", apei_get_debugfs_dir());
- if (!einj_debug_dir)
+ if (!einj_debug_dir) {
+ pr_err("Error creating debugfs node.\n");
goto err_cleanup;
+ }
+
fentry = debugfs_create_file("available_error_type", S_IRUSR,
einj_debug_dir, NULL,
&available_error_type_fops);
if (!fentry)
goto err_cleanup;
+
fentry = debugfs_create_file("error_type", S_IRUSR | S_IWUSR,
einj_debug_dir, NULL, &error_type_fops);
if (!fentry)
apei_resources_init(&einj_resources);
einj_exec_ctx_init(&ctx);
rc = apei_exec_collect_resources(&ctx, &einj_resources);
- if (rc)
+ if (rc) {
+ pr_err("Error collecting EINJ resources.\n");
goto err_fini;
+ }
+
rc = apei_resources_request(&einj_resources, "APEI EINJ");
- if (rc)
+ if (rc) {
+ pr_err("Error requesting memory/port resources.\n");
goto err_fini;
+ }
+
rc = apei_exec_pre_map_gars(&ctx);
- if (rc)
+ if (rc) {
+ pr_err("Error pre-mapping GARs.\n");
goto err_release;
+ }
rc = -ENOMEM;
einj_param = einj_get_parameter_address();
goto err_unmap;
}
- pr_info(EINJ_PFX "Error INJection is initialized.\n");
+ pr_info("Error INJection is initialized.\n");
return 0;
sizeof(struct einj_parameter);
acpi_os_unmap_iomem(einj_param, size);
+ pr_err("Error creating param extension debugfs nodes.\n");
}
apei_exec_post_unmap_gars(&ctx);
err_release:
err_fini:
apei_resources_fini(&einj_resources);
err_cleanup:
+ pr_err("Error creating primary debugfs nodes.\n");
debugfs_remove_recursive(einj_debug_dir);
return rc;
EXPORT_SYMBOL(acpi_run_osc);
bool osc_sb_apei_support_acked;
+
+/*
+ * ACPI 6.0 Section 8.4.4.2 Idle State Coordination
+ * OSPM supports platform coordinated low power idle(LPI) states
+ */
+bool osc_pc_lpi_support_confirmed;
+EXPORT_SYMBOL_GPL(osc_pc_lpi_support_confirmed);
+
static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
static void acpi_bus_osc_support(void)
{
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT;
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
+ capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT;
if (!ghes_disable)
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
return;
if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
u32 *capbuf_ret = context.ret.pointer;
- if (context.ret.length > OSC_SUPPORT_DWORD)
+ if (context.ret.length > OSC_SUPPORT_DWORD) {
osc_sb_apei_support_acked =
capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT;
+ osc_pc_lpi_support_confirmed =
+ capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_PCLPI_SUPPORT;
+ }
kfree(context.ret.pointer);
}
/* do we need to check other returned cap? Sounds no */
continue;
cpc_ptr = per_cpu(cpc_desc_ptr, i);
- if (!cpc_ptr)
- continue;
+ if (!cpc_ptr) {
+ retval = -EFAULT;
+ goto err_ret;
+ }
pdomain = &(cpc_ptr->domain_info);
cpumask_set_cpu(i, pr->shared_cpu_map);
continue;
match_cpc_ptr = per_cpu(cpc_desc_ptr, j);
- if (!match_cpc_ptr)
- continue;
+ if (!match_cpc_ptr) {
+ retval = -EFAULT;
+ goto err_ret;
+ }
match_pdomain = &(match_cpc_ptr->domain_info);
if (match_pdomain->domain != pdomain->domain)
continue;
match_cpc_ptr = per_cpu(cpc_desc_ptr, j);
- if (!match_cpc_ptr)
- continue;
+ if (!match_cpc_ptr) {
+ retval = -EFAULT;
+ goto err_ret;
+ }
match_pdomain = &(match_cpc_ptr->domain_info);
if (match_pdomain->domain != pdomain->domain)
/* Store CPU Logical ID */
cpc_ptr->cpu_id = pr->id;
- /* Plug it into this CPUs CPC descriptor. */
- per_cpu(cpc_desc_ptr, pr->id) = cpc_ptr;
-
/* Parse PSD data for this CPU */
ret = acpi_get_psd(cpc_ptr, handle);
if (ret)
goto out_free;
}
+ /* Plug PSD data into this CPUs CPC descriptor. */
+ per_cpu(cpc_desc_ptr, pr->id) = cpc_ptr;
+
/* Everything looks okay */
pr_debug("Parsed CPC struct for CPU: %d\n", pr->id);
pr->performance_platform_limit);
break;
case ACPI_PROCESSOR_NOTIFY_POWER:
- acpi_processor_cst_has_changed(pr);
+ acpi_processor_power_state_has_changed(pr);
acpi_bus_generate_netlink_event(device->pnp.device_class,
dev_name(&device->dev), event, 0);
break;
static DEFINE_PER_CPU(struct cpuidle_device *, acpi_cpuidle_device);
+struct cpuidle_driver acpi_idle_driver = {
+ .name = "acpi_idle",
+ .owner = THIS_MODULE,
+};
+
+#ifdef CONFIG_ACPI_PROCESSOR_CSTATE
static
DEFINE_PER_CPU(struct acpi_processor_cx * [CPUIDLE_STATE_MAX], acpi_cstate);
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *cst;
-
if (nocst)
return -ENODEV;
return (working);
}
-static int acpi_processor_get_power_info(struct acpi_processor *pr)
+static int acpi_processor_get_cstate_info(struct acpi_processor *pr)
{
unsigned int i;
int result;
acpi_idle_do_entry(cx);
}
-struct cpuidle_driver acpi_idle_driver = {
- .name = "acpi_idle",
- .owner = THIS_MODULE,
-};
-
-/**
- * acpi_processor_setup_cpuidle_cx - prepares and configures CPUIDLE
- * device i.e. per-cpu data
- *
- * @pr: the ACPI processor
- * @dev : the cpuidle device
- */
static int acpi_processor_setup_cpuidle_cx(struct acpi_processor *pr,
struct cpuidle_device *dev)
{
int i, count = CPUIDLE_DRIVER_STATE_START;
struct acpi_processor_cx *cx;
- if (!pr->flags.power_setup_done)
- return -EINVAL;
-
- if (pr->flags.power == 0) {
- return -EINVAL;
- }
-
- if (!dev)
- return -EINVAL;
-
- dev->cpu = pr->id;
-
if (max_cstate == 0)
max_cstate = 1;
return 0;
}
-/**
- * acpi_processor_setup_cpuidle states- prepares and configures cpuidle
- * global state data i.e. idle routines
- *
- * @pr: the ACPI processor
- */
-static int acpi_processor_setup_cpuidle_states(struct acpi_processor *pr)
+static int acpi_processor_setup_cstates(struct acpi_processor *pr)
{
int i, count = CPUIDLE_DRIVER_STATE_START;
struct acpi_processor_cx *cx;
struct cpuidle_state *state;
struct cpuidle_driver *drv = &acpi_idle_driver;
- if (!pr->flags.power_setup_done)
- return -EINVAL;
-
- if (pr->flags.power == 0)
- return -EINVAL;
-
- drv->safe_state_index = -1;
- for (i = CPUIDLE_DRIVER_STATE_START; i < CPUIDLE_STATE_MAX; i++) {
- drv->states[i].name[0] = '\0';
- drv->states[i].desc[0] = '\0';
- }
-
if (max_cstate == 0)
max_cstate = 1;
state = &drv->states[count];
snprintf(state->name, CPUIDLE_NAME_LEN, "C%d", i);
- strncpy(state->desc, cx->desc, CPUIDLE_DESC_LEN);
+ strlcpy(state->desc, cx->desc, CPUIDLE_DESC_LEN);
state->exit_latency = cx->latency;
state->target_residency = cx->latency * latency_factor;
state->enter = acpi_idle_enter;
return 0;
}
+static inline void acpi_processor_cstate_first_run_checks(void)
+{
+ acpi_status status;
+ static int first_run;
+
+ if (first_run)
+ return;
+ dmi_check_system(processor_power_dmi_table);
+ max_cstate = acpi_processor_cstate_check(max_cstate);
+ if (max_cstate < ACPI_C_STATES_MAX)
+ pr_notice("ACPI: processor limited to max C-state %d\n",
+ max_cstate);
+ first_run++;
+
+ if (acpi_gbl_FADT.cst_control && !nocst) {
+ status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
+ acpi_gbl_FADT.cst_control, 8);
+ if (ACPI_FAILURE(status))
+ ACPI_EXCEPTION((AE_INFO, status,
+ "Notifying BIOS of _CST ability failed"));
+ }
+}
+#else
+
+static inline int disabled_by_idle_boot_param(void) { return 0; }
+static inline void acpi_processor_cstate_first_run_checks(void) { }
+static int acpi_processor_get_cstate_info(struct acpi_processor *pr)
+{
+ return -ENODEV;
+}
+
+static int acpi_processor_setup_cpuidle_cx(struct acpi_processor *pr,
+ struct cpuidle_device *dev)
+{
+ return -EINVAL;
+}
+
+static int acpi_processor_setup_cstates(struct acpi_processor *pr)
+{
+ return -EINVAL;
+}
+
+#endif /* CONFIG_ACPI_PROCESSOR_CSTATE */
+
+struct acpi_lpi_states_array {
+ unsigned int size;
+ unsigned int composite_states_size;
+ struct acpi_lpi_state *entries;
+ struct acpi_lpi_state *composite_states[ACPI_PROCESSOR_MAX_POWER];
+};
+
+static int obj_get_integer(union acpi_object *obj, u32 *value)
+{
+ if (obj->type != ACPI_TYPE_INTEGER)
+ return -EINVAL;
+
+ *value = obj->integer.value;
+ return 0;
+}
+
+static int acpi_processor_evaluate_lpi(acpi_handle handle,
+ struct acpi_lpi_states_array *info)
+{
+ acpi_status status;
+ int ret = 0;
+ int pkg_count, state_idx = 1, loop;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object *lpi_data;
+ struct acpi_lpi_state *lpi_state;
+
+ status = acpi_evaluate_object(handle, "_LPI", NULL, &buffer);
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No _LPI, giving up\n"));
+ return -ENODEV;
+ }
+
+ lpi_data = buffer.pointer;
+
+ /* There must be at least 4 elements = 3 elements + 1 package */
+ if (!lpi_data || lpi_data->type != ACPI_TYPE_PACKAGE ||
+ lpi_data->package.count < 4) {
+ pr_debug("not enough elements in _LPI\n");
+ ret = -ENODATA;
+ goto end;
+ }
+
+ pkg_count = lpi_data->package.elements[2].integer.value;
+
+ /* Validate number of power states. */
+ if (pkg_count < 1 || pkg_count != lpi_data->package.count - 3) {
+ pr_debug("count given by _LPI is not valid\n");
+ ret = -ENODATA;
+ goto end;
+ }
+
+ lpi_state = kcalloc(pkg_count, sizeof(*lpi_state), GFP_KERNEL);
+ if (!lpi_state) {
+ ret = -ENOMEM;
+ goto end;
+ }
+
+ info->size = pkg_count;
+ info->entries = lpi_state;
+
+ /* LPI States start at index 3 */
+ for (loop = 3; state_idx <= pkg_count; loop++, state_idx++, lpi_state++) {
+ union acpi_object *element, *pkg_elem, *obj;
+
+ element = &lpi_data->package.elements[loop];
+ if (element->type != ACPI_TYPE_PACKAGE || element->package.count < 7)
+ continue;
+
+ pkg_elem = element->package.elements;
+
+ obj = pkg_elem + 6;
+ if (obj->type == ACPI_TYPE_BUFFER) {
+ struct acpi_power_register *reg;
+
+ reg = (struct acpi_power_register *)obj->buffer.pointer;
+ if (reg->space_id != ACPI_ADR_SPACE_SYSTEM_IO &&
+ reg->space_id != ACPI_ADR_SPACE_FIXED_HARDWARE)
+ continue;
+
+ lpi_state->address = reg->address;
+ lpi_state->entry_method =
+ reg->space_id == ACPI_ADR_SPACE_FIXED_HARDWARE ?
+ ACPI_CSTATE_FFH : ACPI_CSTATE_SYSTEMIO;
+ } else if (obj->type == ACPI_TYPE_INTEGER) {
+ lpi_state->entry_method = ACPI_CSTATE_INTEGER;
+ lpi_state->address = obj->integer.value;
+ } else {
+ continue;
+ }
+
+ /* elements[7,8] skipped for now i.e. Residency/Usage counter*/
+
+ obj = pkg_elem + 9;
+ if (obj->type == ACPI_TYPE_STRING)
+ strlcpy(lpi_state->desc, obj->string.pointer,
+ ACPI_CX_DESC_LEN);
+
+ lpi_state->index = state_idx;
+ if (obj_get_integer(pkg_elem + 0, &lpi_state->min_residency)) {
+ pr_debug("No min. residency found, assuming 10 us\n");
+ lpi_state->min_residency = 10;
+ }
+
+ if (obj_get_integer(pkg_elem + 1, &lpi_state->wake_latency)) {
+ pr_debug("No wakeup residency found, assuming 10 us\n");
+ lpi_state->wake_latency = 10;
+ }
+
+ if (obj_get_integer(pkg_elem + 2, &lpi_state->flags))
+ lpi_state->flags = 0;
+
+ if (obj_get_integer(pkg_elem + 3, &lpi_state->arch_flags))
+ lpi_state->arch_flags = 0;
+
+ if (obj_get_integer(pkg_elem + 4, &lpi_state->res_cnt_freq))
+ lpi_state->res_cnt_freq = 1;
+
+ if (obj_get_integer(pkg_elem + 5, &lpi_state->enable_parent_state))
+ lpi_state->enable_parent_state = 0;
+ }
+
+ acpi_handle_debug(handle, "Found %d power states\n", state_idx);
+end:
+ kfree(buffer.pointer);
+ return ret;
+}
+
+/*
+ * flat_state_cnt - the number of composite LPI states after the process of flattening
+ */
+static int flat_state_cnt;
+
+/**
+ * combine_lpi_states - combine local and parent LPI states to form a composite LPI state
+ *
+ * @local: local LPI state
+ * @parent: parent LPI state
+ * @result: composite LPI state
+ */
+static bool combine_lpi_states(struct acpi_lpi_state *local,
+ struct acpi_lpi_state *parent,
+ struct acpi_lpi_state *result)
+{
+ if (parent->entry_method == ACPI_CSTATE_INTEGER) {
+ if (!parent->address) /* 0 means autopromotable */
+ return false;
+ result->address = local->address + parent->address;
+ } else {
+ result->address = parent->address;
+ }
+
+ result->min_residency = max(local->min_residency, parent->min_residency);
+ result->wake_latency = local->wake_latency + parent->wake_latency;
+ result->enable_parent_state = parent->enable_parent_state;
+ result->entry_method = local->entry_method;
+
+ result->flags = parent->flags;
+ result->arch_flags = parent->arch_flags;
+ result->index = parent->index;
+
+ strlcpy(result->desc, local->desc, ACPI_CX_DESC_LEN);
+ strlcat(result->desc, "+", ACPI_CX_DESC_LEN);
+ strlcat(result->desc, parent->desc, ACPI_CX_DESC_LEN);
+ return true;
+}
+
+#define ACPI_LPI_STATE_FLAGS_ENABLED BIT(0)
+
+static void stash_composite_state(struct acpi_lpi_states_array *curr_level,
+ struct acpi_lpi_state *t)
+{
+ curr_level->composite_states[curr_level->composite_states_size++] = t;
+}
+
+static int flatten_lpi_states(struct acpi_processor *pr,
+ struct acpi_lpi_states_array *curr_level,
+ struct acpi_lpi_states_array *prev_level)
+{
+ int i, j, state_count = curr_level->size;
+ struct acpi_lpi_state *p, *t = curr_level->entries;
+
+ curr_level->composite_states_size = 0;
+ for (j = 0; j < state_count; j++, t++) {
+ struct acpi_lpi_state *flpi;
+
+ if (!(t->flags & ACPI_LPI_STATE_FLAGS_ENABLED))
+ continue;
+
+ if (flat_state_cnt >= ACPI_PROCESSOR_MAX_POWER) {
+ pr_warn("Limiting number of LPI states to max (%d)\n",
+ ACPI_PROCESSOR_MAX_POWER);
+ pr_warn("Please increase ACPI_PROCESSOR_MAX_POWER if needed.\n");
+ break;
+ }
+
+ flpi = &pr->power.lpi_states[flat_state_cnt];
+
+ if (!prev_level) { /* leaf/processor node */
+ memcpy(flpi, t, sizeof(*t));
+ stash_composite_state(curr_level, flpi);
+ flat_state_cnt++;
+ continue;
+ }
+
+ for (i = 0; i < prev_level->composite_states_size; i++) {
+ p = prev_level->composite_states[i];
+ if (t->index <= p->enable_parent_state &&
+ combine_lpi_states(p, t, flpi)) {
+ stash_composite_state(curr_level, flpi);
+ flat_state_cnt++;
+ flpi++;
+ }
+ }
+ }
+
+ kfree(curr_level->entries);
+ return 0;
+}
+
+static int acpi_processor_get_lpi_info(struct acpi_processor *pr)
+{
+ int ret, i;
+ acpi_status status;
+ acpi_handle handle = pr->handle, pr_ahandle;
+ struct acpi_device *d = NULL;
+ struct acpi_lpi_states_array info[2], *tmp, *prev, *curr;
+
+ if (!osc_pc_lpi_support_confirmed)
+ return -EOPNOTSUPP;
+
+ if (!acpi_has_method(handle, "_LPI"))
+ return -EINVAL;
+
+ flat_state_cnt = 0;
+ prev = &info[0];
+ curr = &info[1];
+ handle = pr->handle;
+ ret = acpi_processor_evaluate_lpi(handle, prev);
+ if (ret)
+ return ret;
+ flatten_lpi_states(pr, prev, NULL);
+
+ status = acpi_get_parent(handle, &pr_ahandle);
+ while (ACPI_SUCCESS(status)) {
+ acpi_bus_get_device(pr_ahandle, &d);
+ handle = pr_ahandle;
+
+ if (strcmp(acpi_device_hid(d), ACPI_PROCESSOR_CONTAINER_HID))
+ break;
+
+ /* can be optional ? */
+ if (!acpi_has_method(handle, "_LPI"))
+ break;
+
+ ret = acpi_processor_evaluate_lpi(handle, curr);
+ if (ret)
+ break;
+
+ /* flatten all the LPI states in this level of hierarchy */
+ flatten_lpi_states(pr, curr, prev);
+
+ tmp = prev, prev = curr, curr = tmp;
+
+ status = acpi_get_parent(handle, &pr_ahandle);
+ }
+
+ pr->power.count = flat_state_cnt;
+ /* reset the index after flattening */
+ for (i = 0; i < pr->power.count; i++)
+ pr->power.lpi_states[i].index = i;
+
+ /* Tell driver that _LPI is supported. */
+ pr->flags.has_lpi = 1;
+ pr->flags.power = 1;
+
+ return 0;
+}
+
+int __weak acpi_processor_ffh_lpi_probe(unsigned int cpu)
+{
+ return -ENODEV;
+}
+
+int __weak acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi)
+{
+ return -ENODEV;
+}
+
+/**
+ * acpi_idle_lpi_enter - enters an ACPI any LPI state
+ * @dev: the target CPU
+ * @drv: cpuidle driver containing cpuidle state info
+ * @index: index of target state
+ *
+ * Return: 0 for success or negative value for error
+ */
+static int acpi_idle_lpi_enter(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv, int index)
+{
+ struct acpi_processor *pr;
+ struct acpi_lpi_state *lpi;
+
+ pr = __this_cpu_read(processors);
+
+ if (unlikely(!pr))
+ return -EINVAL;
+
+ lpi = &pr->power.lpi_states[index];
+ if (lpi->entry_method == ACPI_CSTATE_FFH)
+ return acpi_processor_ffh_lpi_enter(lpi);
+
+ return -EINVAL;
+}
+
+static int acpi_processor_setup_lpi_states(struct acpi_processor *pr)
+{
+ int i;
+ struct acpi_lpi_state *lpi;
+ struct cpuidle_state *state;
+ struct cpuidle_driver *drv = &acpi_idle_driver;
+
+ if (!pr->flags.has_lpi)
+ return -EOPNOTSUPP;
+
+ for (i = 0; i < pr->power.count && i < CPUIDLE_STATE_MAX; i++) {
+ lpi = &pr->power.lpi_states[i];
+
+ state = &drv->states[i];
+ snprintf(state->name, CPUIDLE_NAME_LEN, "LPI-%d", i);
+ strlcpy(state->desc, lpi->desc, CPUIDLE_DESC_LEN);
+ state->exit_latency = lpi->wake_latency;
+ state->target_residency = lpi->min_residency;
+ if (lpi->arch_flags)
+ state->flags |= CPUIDLE_FLAG_TIMER_STOP;
+ state->enter = acpi_idle_lpi_enter;
+ drv->safe_state_index = i;
+ }
+
+ drv->state_count = i;
+
+ return 0;
+}
+
+/**
+ * acpi_processor_setup_cpuidle_states- prepares and configures cpuidle
+ * global state data i.e. idle routines
+ *
+ * @pr: the ACPI processor
+ */
+static int acpi_processor_setup_cpuidle_states(struct acpi_processor *pr)
+{
+ int i;
+ struct cpuidle_driver *drv = &acpi_idle_driver;
+
+ if (!pr->flags.power_setup_done || !pr->flags.power)
+ return -EINVAL;
+
+ drv->safe_state_index = -1;
+ for (i = CPUIDLE_DRIVER_STATE_START; i < CPUIDLE_STATE_MAX; i++) {
+ drv->states[i].name[0] = '\0';
+ drv->states[i].desc[0] = '\0';
+ }
+
+ if (pr->flags.has_lpi)
+ return acpi_processor_setup_lpi_states(pr);
+
+ return acpi_processor_setup_cstates(pr);
+}
+
+/**
+ * acpi_processor_setup_cpuidle_dev - prepares and configures CPUIDLE
+ * device i.e. per-cpu data
+ *
+ * @pr: the ACPI processor
+ * @dev : the cpuidle device
+ */
+static int acpi_processor_setup_cpuidle_dev(struct acpi_processor *pr,
+ struct cpuidle_device *dev)
+{
+ if (!pr->flags.power_setup_done || !pr->flags.power || !dev)
+ return -EINVAL;
+
+ dev->cpu = pr->id;
+ if (pr->flags.has_lpi)
+ return acpi_processor_ffh_lpi_probe(pr->id);
+
+ return acpi_processor_setup_cpuidle_cx(pr, dev);
+}
+
+static int acpi_processor_get_power_info(struct acpi_processor *pr)
+{
+ int ret;
+
+ ret = acpi_processor_get_lpi_info(pr);
+ if (ret)
+ ret = acpi_processor_get_cstate_info(pr);
+
+ return ret;
+}
+
int acpi_processor_hotplug(struct acpi_processor *pr)
{
int ret = 0;
if (disabled_by_idle_boot_param())
return 0;
- if (nocst)
- return -ENODEV;
-
if (!pr->flags.power_setup_done)
return -ENODEV;
dev = per_cpu(acpi_cpuidle_device, pr->id);
cpuidle_pause_and_lock();
cpuidle_disable_device(dev);
- acpi_processor_get_power_info(pr);
- if (pr->flags.power) {
- acpi_processor_setup_cpuidle_cx(pr, dev);
+ ret = acpi_processor_get_power_info(pr);
+ if (!ret && pr->flags.power) {
+ acpi_processor_setup_cpuidle_dev(pr, dev);
ret = cpuidle_enable_device(dev);
}
cpuidle_resume_and_unlock();
return ret;
}
-int acpi_processor_cst_has_changed(struct acpi_processor *pr)
+int acpi_processor_power_state_has_changed(struct acpi_processor *pr)
{
int cpu;
struct acpi_processor *_pr;
if (disabled_by_idle_boot_param())
return 0;
- if (nocst)
- return -ENODEV;
-
if (!pr->flags.power_setup_done)
return -ENODEV;
acpi_processor_get_power_info(_pr);
if (_pr->flags.power) {
dev = per_cpu(acpi_cpuidle_device, cpu);
- acpi_processor_setup_cpuidle_cx(_pr, dev);
+ acpi_processor_setup_cpuidle_dev(_pr, dev);
cpuidle_enable_device(dev);
}
}
int acpi_processor_power_init(struct acpi_processor *pr)
{
- acpi_status status;
int retval;
struct cpuidle_device *dev;
- static int first_run;
if (disabled_by_idle_boot_param())
return 0;
- if (!first_run) {
- dmi_check_system(processor_power_dmi_table);
- max_cstate = acpi_processor_cstate_check(max_cstate);
- if (max_cstate < ACPI_C_STATES_MAX)
- printk(KERN_NOTICE
- "ACPI: processor limited to max C-state %d\n",
- max_cstate);
- first_run++;
- }
-
- if (acpi_gbl_FADT.cst_control && !nocst) {
- status =
- acpi_os_write_port(acpi_gbl_FADT.smi_command, acpi_gbl_FADT.cst_control, 8);
- if (ACPI_FAILURE(status)) {
- ACPI_EXCEPTION((AE_INFO, status,
- "Notifying BIOS of _CST ability failed"));
- }
- }
+ acpi_processor_cstate_first_run_checks();
- acpi_processor_get_power_info(pr);
- pr->flags.power_setup_done = 1;
+ if (!acpi_processor_get_power_info(pr))
+ pr->flags.power_setup_done = 1;
/*
* Install the idle handler if processor power management is supported.
return -ENOMEM;
per_cpu(acpi_cpuidle_device, pr->id) = dev;
- acpi_processor_setup_cpuidle_cx(pr, dev);
+ acpi_processor_setup_cpuidle_dev(pr, dev);
/* Register per-cpu cpuidle_device. Cpuidle driver
* must already be registered before registering device
}
}
-static int tts_notify_reboot(struct notifier_block *this,
+static void acpi_sleep_pts_switch(u32 acpi_state)
+{
+ acpi_status status;
+
+ status = acpi_execute_simple_method(NULL, "\\_PTS", acpi_state);
+ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+ /*
+ * OS can't evaluate the _PTS object correctly. Some warning
+ * message will be printed. But it won't break anything.
+ */
+ printk(KERN_NOTICE "Failure in evaluating _PTS object\n");
+ }
+}
+
+static int sleep_notify_reboot(struct notifier_block *this,
unsigned long code, void *x)
{
acpi_sleep_tts_switch(ACPI_STATE_S5);
+
+ acpi_sleep_pts_switch(ACPI_STATE_S5);
+
return NOTIFY_DONE;
}
-static struct notifier_block tts_notifier = {
- .notifier_call = tts_notify_reboot,
+static struct notifier_block sleep_notifier = {
+ .notifier_call = sleep_notify_reboot,
.next = NULL,
.priority = 0,
};
pr_info(PREFIX "(supports%s)\n", supported);
/*
- * Register the tts_notifier to reboot notifier list so that the _TTS
- * object can also be evaluated when the system enters S5.
+ * Register the sleep_notifier to reboot notifier list so that the _TTS
+ * and _PTS object can also be evaluated when the system enters S5.
*/
- register_reboot_notifier(&tts_notifier);
+ register_reboot_notifier(&sleep_notifier);
return 0;
}
static int arm_enter_idle_state(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int idx)
{
- int ret;
-
- if (!idx) {
- cpu_do_idle();
- return idx;
- }
-
- ret = cpu_pm_enter();
- if (!ret) {
- /*
- * Pass idle state index to cpu_suspend which in turn will
- * call the CPU ops suspend protocol with idle index as a
- * parameter.
- */
- ret = arm_cpuidle_suspend(idx);
-
- cpu_pm_exit();
- }
-
- return ret ? -1 : idx;
+ /*
+ * Pass idle state index to arm_cpuidle_suspend which in turn
+ * will call the CPU ops suspend protocol with idle index as a
+ * parameter.
+ */
+ return CPU_PM_CPU_IDLE_ENTER(arm_cpuidle_suspend, idx);
}
static struct cpuidle_driver arm_idle_driver = {
#define pr_fmt(fmt) "psci: " fmt
+#include <linux/acpi.h>
#include <linux/arm-smccc.h>
#include <linux/cpuidle.h>
#include <linux/errno.h>
u32 *psci_states;
struct device_node *state_node;
- /*
- * If the PSCI cpu_suspend function hook has not been initialized
- * idle states must not be enabled, so bail out
- */
- if (!psci_ops.cpu_suspend)
- return -EOPNOTSUPP;
-
/* Count idle states */
while ((state_node = of_parse_phandle(cpu_node, "cpu-idle-states",
count))) {
return ret;
}
+#ifdef CONFIG_ACPI
+#include <acpi/processor.h>
+
+static int __maybe_unused psci_acpi_cpu_init_idle(unsigned int cpu)
+{
+ int i, count;
+ u32 *psci_states;
+ struct acpi_lpi_state *lpi;
+ struct acpi_processor *pr = per_cpu(processors, cpu);
+
+ if (unlikely(!pr || !pr->flags.has_lpi))
+ return -EINVAL;
+
+ count = pr->power.count - 1;
+ if (count <= 0)
+ return -ENODEV;
+
+ psci_states = kcalloc(count, sizeof(*psci_states), GFP_KERNEL);
+ if (!psci_states)
+ return -ENOMEM;
+
+ for (i = 0; i < count; i++) {
+ u32 state;
+
+ lpi = &pr->power.lpi_states[i + 1];
+ /*
+ * Only bits[31:0] represent a PSCI power_state while
+ * bits[63:32] must be 0x0 as per ARM ACPI FFH Specification
+ */
+ state = lpi->address;
+ if (!psci_power_state_is_valid(state)) {
+ pr_warn("Invalid PSCI power state %#x\n", state);
+ kfree(psci_states);
+ return -EINVAL;
+ }
+ psci_states[i] = state;
+ }
+ /* Idle states parsed correctly, initialize per-cpu pointer */
+ per_cpu(psci_power_state, cpu) = psci_states;
+ return 0;
+}
+#else
+static int __maybe_unused psci_acpi_cpu_init_idle(unsigned int cpu)
+{
+ return -EINVAL;
+}
+#endif
+
int psci_cpu_init_idle(unsigned int cpu)
{
struct device_node *cpu_node;
int ret;
+ /*
+ * If the PSCI cpu_suspend function hook has not been initialized
+ * idle states must not be enabled, so bail out
+ */
+ if (!psci_ops.cpu_suspend)
+ return -EOPNOTSUPP;
+
+ if (!acpi_disabled)
+ return psci_acpi_cpu_init_idle(cpu);
+
cpu_node = of_get_cpu_node(cpu, NULL);
if (!cpu_node)
return -ENODEV;
#define _CPPC_ACPI_H
#include <linux/acpi.h>
-#include <linux/mailbox_controller.h>
-#include <linux/mailbox_client.h>
#include <linux/types.h>
+#include <acpi/pcc.h>
#include <acpi/processor.h>
/* Only support CPPCv2 for now. */
extern int cppc_get_perf_caps(int cpu, struct cppc_perf_caps *caps);
extern int acpi_get_psd_map(struct cpudata **);
-/* Methods to interact with the PCC mailbox controller. */
-extern struct mbox_chan *
- pcc_mbox_request_channel(struct mbox_client *, unsigned int);
-
#endif /* _CPPC_ACPI_H*/
--- /dev/null
+/*
+ * PCC (Platform Communications Channel) methods
+ *
+ * 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; version 2
+ * of the License.
+ */
+
+#ifndef _PCC_H
+#define _PCC_H
+
+#include <linux/mailbox_controller.h>
+#include <linux/mailbox_client.h>
+
+#ifdef CONFIG_PCC
+extern struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl,
+ int subspace_id);
+extern void pcc_mbox_free_channel(struct mbox_chan *chan);
+#else
+static inline struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl,
+ int subspace_id)
+{
+ return NULL;
+}
+static inline void pcc_mbox_free_channel(struct mbox_chan *chan) { }
+#endif
+
+#endif /* _PCC_H */
#define ACPI_CSTATE_SYSTEMIO 0
#define ACPI_CSTATE_FFH 1
#define ACPI_CSTATE_HALT 2
+#define ACPI_CSTATE_INTEGER 3
#define ACPI_CX_DESC_LEN 32
char desc[ACPI_CX_DESC_LEN];
};
+struct acpi_lpi_state {
+ u32 min_residency;
+ u32 wake_latency; /* worst case */
+ u32 flags;
+ u32 arch_flags;
+ u32 res_cnt_freq;
+ u32 enable_parent_state;
+ u64 address;
+ u8 index;
+ u8 entry_method;
+ char desc[ACPI_CX_DESC_LEN];
+};
+
struct acpi_processor_power {
int count;
- struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
+ union {
+ struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
+ struct acpi_lpi_state lpi_states[ACPI_PROCESSOR_MAX_POWER];
+ };
int timer_broadcast_on_state;
};
u8 bm_control:1;
u8 bm_check:1;
u8 has_cst:1;
+ u8 has_lpi:1;
u8 power_setup_done:1;
u8 bm_rld_set:1;
u8 need_hotplug_init:1;
DECLARE_PER_CPU(struct acpi_processor *, processors);
extern struct acpi_processor_errata errata;
-#ifdef ARCH_HAS_POWER_INIT
+#if defined(ARCH_HAS_POWER_INIT) && defined(CONFIG_ACPI_PROCESSOR_CSTATE)
void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
unsigned int cpu);
int acpi_processor_ffh_cstate_probe(unsigned int cpu,
#ifdef CONFIG_ACPI_PROCESSOR_IDLE
int acpi_processor_power_init(struct acpi_processor *pr);
int acpi_processor_power_exit(struct acpi_processor *pr);
-int acpi_processor_cst_has_changed(struct acpi_processor *pr);
+int acpi_processor_power_state_has_changed(struct acpi_processor *pr);
int acpi_processor_hotplug(struct acpi_processor *pr);
#else
static inline int acpi_processor_power_init(struct acpi_processor *pr)
return -ENODEV;
}
-static inline int acpi_processor_cst_has_changed(struct acpi_processor *pr)
+static inline int acpi_processor_power_state_has_changed(struct acpi_processor *pr)
{
return -ENODEV;
}
#define OSC_SB_HOTPLUG_OST_SUPPORT 0x00000008
#define OSC_SB_APEI_SUPPORT 0x00000010
#define OSC_SB_CPC_SUPPORT 0x00000020
+#define OSC_SB_CPCV2_SUPPORT 0x00000040
+#define OSC_SB_PCLPI_SUPPORT 0x00000080
+#define OSC_SB_OSLPI_SUPPORT 0x00000100
extern bool osc_sb_apei_support_acked;
+extern bool osc_pc_lpi_support_confirmed;
/* PCI Host Bridge _OSC: Capabilities DWORD 2: Support Field */
#define OSC_PCI_EXT_CONFIG_SUPPORT 0x00000001
#define CPUIDLE_DRIVER_STATE_START 0
#endif
+#define CPU_PM_CPU_IDLE_ENTER(low_level_idle_enter, idx) \
+({ \
+ int __ret; \
+ \
+ if (!idx) { \
+ cpu_do_idle(); \
+ return idx; \
+ } \
+ \
+ __ret = cpu_pm_enter(); \
+ if (!__ret) { \
+ __ret = low_level_idle_enter(idx); \
+ cpu_pm_exit(); \
+ } \
+ \
+ __ret ? -1 : idx; \
+})
+
#endif /* _LINUX_CPUIDLE_H */
projects / cascardo / linux.git / commitdiff