#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
-#include <linux/slab.h>
#include <linux/interrupt.h>
-#include <linux/thermal.h>
#include <asm/cpu_device_id.h>
-#include <asm/iosf_mbi.h>
-
-#define SOC_DTS_OFFSET_ENABLE 0xB0
-#define SOC_DTS_OFFSET_TEMP 0xB1
-
-#define SOC_DTS_OFFSET_PTPS 0xB2
-#define SOC_DTS_OFFSET_PTTS 0xB3
-#define SOC_DTS_OFFSET_PTTSS 0xB4
-#define SOC_DTS_OFFSET_PTMC 0x80
-#define SOC_DTS_TE_AUX0 0xB5
-#define SOC_DTS_TE_AUX1 0xB6
-
-#define SOC_DTS_AUX0_ENABLE_BIT BIT(0)
-#define SOC_DTS_AUX1_ENABLE_BIT BIT(1)
-#define SOC_DTS_CPU_MODULE0_ENABLE_BIT BIT(16)
-#define SOC_DTS_CPU_MODULE1_ENABLE_BIT BIT(17)
-#define SOC_DTS_TE_SCI_ENABLE BIT(9)
-#define SOC_DTS_TE_SMI_ENABLE BIT(10)
-#define SOC_DTS_TE_MSI_ENABLE BIT(11)
-#define SOC_DTS_TE_APICA_ENABLE BIT(14)
-#define SOC_DTS_PTMC_APIC_DEASSERT_BIT BIT(4)
-
-/* DTS encoding for TJ MAX temperature */
-#define SOC_DTS_TJMAX_ENCODING 0x7F
-
-/* IRQ 86 is a fixed APIC interrupt for BYT DTS Aux threshold notifications */
-#define BYT_SOC_DTS_APIC_IRQ 86
-
-/* Only 2 out of 4 is allowed for OSPM */
-#define SOC_MAX_DTS_TRIPS 2
-
-/* Mask for two trips in status bits */
-#define SOC_DTS_TRIP_MASK 0x03
-
-/* DTS0 and DTS 1 */
-#define SOC_MAX_DTS_SENSORS 2
+#include "intel_soc_dts_iosf.h"
#define CRITICAL_OFFSET_FROM_TJ_MAX 5000
-struct soc_sensor_entry {
- int id;
- u32 tj_max;
- u32 temp_mask;
- u32 temp_shift;
- u32 store_status;
- struct thermal_zone_device *tzone;
-};
-
-static struct soc_sensor_entry *soc_dts[SOC_MAX_DTS_SENSORS];
-
static int crit_offset = CRITICAL_OFFSET_FROM_TJ_MAX;
module_param(crit_offset, int, 0644);
MODULE_PARM_DESC(crit_offset,
"Critical Temperature offset from tj max in millidegree Celsius.");
-static DEFINE_MUTEX(aux_update_mutex);
-static spinlock_t intr_notify_lock;
-static int soc_dts_thres_irq;
-
-static int get_tj_max(u32 *tj_max)
-{
- u32 eax, edx;
- u32 val;
- int err;
-
- err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &eax, &edx);
- if (err)
- goto err_ret;
- else {
- val = (eax >> 16) & 0xff;
- if (val)
- *tj_max = val * 1000;
- else {
- err = -EINVAL;
- goto err_ret;
- }
- }
-
- return 0;
-err_ret:
- *tj_max = 0;
-
- return err;
-}
-
-static int sys_get_trip_temp(struct thermal_zone_device *tzd,
- int trip, unsigned long *temp)
-{
- int status;
- u32 out;
- struct soc_sensor_entry *aux_entry;
-
- aux_entry = tzd->devdata;
-
- if (!trip) {
- /* Just return the critical temp */
- *temp = aux_entry->tj_max - crit_offset;
- return 0;
- }
-
- mutex_lock(&aux_update_mutex);
- status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
- SOC_DTS_OFFSET_PTPS, &out);
- mutex_unlock(&aux_update_mutex);
- if (status)
- return status;
-
- out = (out >> (trip * 8)) & SOC_DTS_TJMAX_ENCODING;
-
- if (!out)
- *temp = 0;
- else
- *temp = aux_entry->tj_max - out * 1000;
-
- return 0;
-}
-
-static int update_trip_temp(struct soc_sensor_entry *aux_entry,
- int thres_index, unsigned long temp)
-{
- int status;
- u32 temp_out;
- u32 out;
- u32 store_ptps;
- u32 store_ptmc;
- u32 store_te_out;
- u32 te_out;
-
- u32 int_enable_bit = SOC_DTS_TE_APICA_ENABLE |
- SOC_DTS_TE_MSI_ENABLE;
-
- temp_out = (aux_entry->tj_max - temp) / 1000;
-
- status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
- SOC_DTS_OFFSET_PTPS, &store_ptps);
- if (status)
- return status;
-
- out = (store_ptps & ~(0xFF << (thres_index * 8)));
- out |= (temp_out & 0xFF) << (thres_index * 8);
- status = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
- SOC_DTS_OFFSET_PTPS, out);
- if (status)
- return status;
- pr_debug("update_trip_temp PTPS = %x\n", out);
- status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
- SOC_DTS_OFFSET_PTMC, &out);
- if (status)
- goto err_restore_ptps;
-
- store_ptmc = out;
-
- status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
- SOC_DTS_TE_AUX0 + thres_index,
- &te_out);
- if (status)
- goto err_restore_ptmc;
-
- store_te_out = te_out;
-
- /* Enable for CPU module 0 and module 1 */
- out |= (SOC_DTS_CPU_MODULE0_ENABLE_BIT |
- SOC_DTS_CPU_MODULE1_ENABLE_BIT);
- if (temp) {
- if (thres_index)
- out |= SOC_DTS_AUX1_ENABLE_BIT;
- else
- out |= SOC_DTS_AUX0_ENABLE_BIT;
- te_out |= int_enable_bit;
- } else {
- if (thres_index)
- out &= ~SOC_DTS_AUX1_ENABLE_BIT;
- else
- out &= ~SOC_DTS_AUX0_ENABLE_BIT;
- te_out &= ~int_enable_bit;
- }
- status = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
- SOC_DTS_OFFSET_PTMC, out);
- if (status)
- goto err_restore_te_out;
-
- status = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
- SOC_DTS_TE_AUX0 + thres_index,
- te_out);
- if (status)
- goto err_restore_te_out;
-
- return 0;
-
-err_restore_te_out:
- iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
- SOC_DTS_OFFSET_PTMC, store_te_out);
-err_restore_ptmc:
- iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
- SOC_DTS_OFFSET_PTMC, store_ptmc);
-err_restore_ptps:
- iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
- SOC_DTS_OFFSET_PTPS, store_ptps);
- /* Nothing we can do if restore fails */
-
- return status;
-}
-
-static int sys_set_trip_temp(struct thermal_zone_device *tzd, int trip,
- unsigned long temp)
-{
- struct soc_sensor_entry *aux_entry = tzd->devdata;
- int status;
-
- if (temp > (aux_entry->tj_max - crit_offset))
- return -EINVAL;
-
- mutex_lock(&aux_update_mutex);
- status = update_trip_temp(tzd->devdata, trip, temp);
- mutex_unlock(&aux_update_mutex);
-
- return status;
-}
-
-static int sys_get_trip_type(struct thermal_zone_device *thermal,
- int trip, enum thermal_trip_type *type)
-{
- if (trip)
- *type = THERMAL_TRIP_PASSIVE;
- else
- *type = THERMAL_TRIP_CRITICAL;
-
- return 0;
-}
-
-static int sys_get_curr_temp(struct thermal_zone_device *tzd,
- unsigned long *temp)
-{
- int status;
- u32 out;
- struct soc_sensor_entry *aux_entry;
-
- aux_entry = tzd->devdata;
-
- status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
- SOC_DTS_OFFSET_TEMP, &out);
- if (status)
- return status;
-
- out = (out & aux_entry->temp_mask) >> aux_entry->temp_shift;
- out -= SOC_DTS_TJMAX_ENCODING;
- *temp = aux_entry->tj_max - out * 1000;
-
- return 0;
-}
-
-static struct thermal_zone_device_ops tzone_ops = {
- .get_temp = sys_get_curr_temp,
- .get_trip_temp = sys_get_trip_temp,
- .get_trip_type = sys_get_trip_type,
- .set_trip_temp = sys_set_trip_temp,
-};
-
-static void free_soc_dts(struct soc_sensor_entry *aux_entry)
-{
- if (aux_entry) {
- iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
- SOC_DTS_OFFSET_ENABLE, aux_entry->store_status);
- thermal_zone_device_unregister(aux_entry->tzone);
- kfree(aux_entry);
- }
-}
-
-static int soc_dts_enable(int id)
-{
- u32 out;
- int ret;
-
- ret = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
- SOC_DTS_OFFSET_ENABLE, &out);
- if (ret)
- return ret;
-
- if (!(out & BIT(id))) {
- out |= BIT(id);
- ret = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
- SOC_DTS_OFFSET_ENABLE, out);
- if (ret)
- return ret;
- }
-
- return ret;
-}
-
-static struct soc_sensor_entry *alloc_soc_dts(int id, u32 tj_max,
- bool notification_support)
-{
- struct soc_sensor_entry *aux_entry;
- char name[10];
- int trip_count = 0;
- int trip_mask = 0;
- int err;
-
- aux_entry = kzalloc(sizeof(*aux_entry), GFP_KERNEL);
- if (!aux_entry) {
- err = -ENOMEM;
- return ERR_PTR(-ENOMEM);
- }
-
- /* Store status to restor on exit */
- err = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
- SOC_DTS_OFFSET_ENABLE,
- &aux_entry->store_status);
- if (err)
- goto err_ret;
-
- aux_entry->id = id;
- aux_entry->tj_max = tj_max;
- aux_entry->temp_mask = 0x00FF << (id * 8);
- aux_entry->temp_shift = id * 8;
- if (notification_support) {
- trip_count = SOC_MAX_DTS_TRIPS;
- trip_mask = 0x02;
- }
- snprintf(name, sizeof(name), "soc_dts%d", id);
- aux_entry->tzone = thermal_zone_device_register(name,
- trip_count,
- trip_mask,
- aux_entry, &tzone_ops,
- NULL, 0, 0);
- if (IS_ERR(aux_entry->tzone)) {
- err = PTR_ERR(aux_entry->tzone);
- goto err_ret;
- }
-
- err = soc_dts_enable(id);
- if (err)
- goto err_aux_status;
-
- return aux_entry;
-
-err_aux_status:
- thermal_zone_device_unregister(aux_entry->tzone);
-err_ret:
- kfree(aux_entry);
- return ERR_PTR(err);
-}
-
-static void proc_thermal_interrupt(void)
-{
- u32 sticky_out;
- int status;
- u32 ptmc_out;
- unsigned long flags;
-
- spin_lock_irqsave(&intr_notify_lock, flags);
-
- /* Clear APIC interrupt */
- status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
- SOC_DTS_OFFSET_PTMC, &ptmc_out);
-
- ptmc_out |= SOC_DTS_PTMC_APIC_DEASSERT_BIT;
- status = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
- SOC_DTS_OFFSET_PTMC, ptmc_out);
-
- /* Read status here */
- status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
- SOC_DTS_OFFSET_PTTSS, &sticky_out);
- pr_debug("status %d PTTSS %x\n", status, sticky_out);
- if (sticky_out & SOC_DTS_TRIP_MASK) {
- int i;
- /* reset sticky bit */
- status = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
- SOC_DTS_OFFSET_PTTSS, sticky_out);
- spin_unlock_irqrestore(&intr_notify_lock, flags);
-
- for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
- pr_debug("TZD update for zone %d\n", i);
- thermal_zone_device_update(soc_dts[i]->tzone);
- }
- } else
- spin_unlock_irqrestore(&intr_notify_lock, flags);
+/* IRQ 86 is a fixed APIC interrupt for BYT DTS Aux threshold notifications */
+#define BYT_SOC_DTS_APIC_IRQ 86
-}
+static int soc_dts_thres_irq;
+static struct intel_soc_dts_sensors *soc_dts;
static irqreturn_t soc_irq_thread_fn(int irq, void *dev_data)
{
- proc_thermal_interrupt();
pr_debug("proc_thermal_interrupt\n");
+ intel_soc_dts_iosf_interrupt_handler(soc_dts);
return IRQ_HANDLED;
}
static const struct x86_cpu_id soc_thermal_ids[] = {
{ X86_VENDOR_INTEL, X86_FAMILY_ANY, 0x37, 0, BYT_SOC_DTS_APIC_IRQ},
- { X86_VENDOR_INTEL, X86_FAMILY_ANY, 0x4c, 0, 0},
{}
};
MODULE_DEVICE_TABLE(x86cpu, soc_thermal_ids);
static int __init intel_soc_thermal_init(void)
{
- u32 tj_max;
int err = 0;
- int i;
const struct x86_cpu_id *match_cpu;
match_cpu = x86_match_cpu(soc_thermal_ids);
if (!match_cpu)
return -ENODEV;
- if (get_tj_max(&tj_max))
- return -EINVAL;
-
- soc_dts_thres_irq = (int)match_cpu->driver_data;
-
- for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
- soc_dts[i] = alloc_soc_dts(i, tj_max,
- soc_dts_thres_irq ? true : false);
- if (IS_ERR(soc_dts[i])) {
- err = PTR_ERR(soc_dts[i]);
- goto err_free;
- }
+ /* Create a zone with 2 trips with marked as read only */
+ soc_dts = intel_soc_dts_iosf_init(INTEL_SOC_DTS_INTERRUPT_APIC, 2, 1);
+ if (IS_ERR(soc_dts)) {
+ err = PTR_ERR(soc_dts);
+ return err;
}
- spin_lock_init(&intr_notify_lock);
+ soc_dts_thres_irq = (int)match_cpu->driver_data;
if (soc_dts_thres_irq) {
err = request_threaded_irq(soc_dts_thres_irq, NULL,
"soc_dts", soc_dts);
if (err) {
pr_err("request_threaded_irq ret %d\n", err);
- goto err_free;
+ goto error_irq;
}
}
- for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
- err = update_trip_temp(soc_dts[i], 0, tj_max - crit_offset);
- if (err)
- goto err_trip_temp;
- }
+ err = intel_soc_dts_iosf_add_read_only_critical_trip(soc_dts,
+ crit_offset);
+ if (err)
+ goto error_trips;
return 0;
-err_trip_temp:
- i = SOC_MAX_DTS_SENSORS;
+error_trips:
if (soc_dts_thres_irq)
free_irq(soc_dts_thres_irq, soc_dts);
-err_free:
- while (--i >= 0)
- free_soc_dts(soc_dts[i]);
+error_irq:
+ intel_soc_dts_iosf_exit(soc_dts);
return err;
}
static void __exit intel_soc_thermal_exit(void)
{
- int i;
-
- for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i)
- update_trip_temp(soc_dts[i], 0, 0);
-
if (soc_dts_thres_irq)
free_irq(soc_dts_thres_irq, soc_dts);
-
- for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i)
- free_soc_dts(soc_dts[i]);
-
+ intel_soc_dts_iosf_exit(soc_dts);
}
module_init(intel_soc_thermal_init)
Code Review / kvmfornfv.git / blobdiff