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Message-Id: <8ee61e13-bba2-4876-9ce1-b5849071ae98@app.fastmail.com>
Date: Mon, 30 Sep 2024 11:12:44 +1300
From: "Luke Jones" <luke@...nes.dev>
To: "Mario Limonciello" <superm1@...nel.org>, linux-kernel@...r.kernel.org
Cc: linux-input@...r.kernel.org, "Jiri Kosina" <jikos@...nel.org>,
platform-driver-x86@...r.kernel.org,
Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
"Hans de Goede" <hdegoede@...hat.com>, corentin.chary@...il.com
Subject: Re: [PATCH v5 8/9] platform/x86: asus-armoury: add core count control
On Mon, 30 Sep 2024, at 7:57 AM, Mario Limonciello wrote:
> On 9/29/24 04:08, Luke D. Jones wrote:
>> Implement Intel core enablement under the asus-armoury module using the
>> fw_attributes class.
>>
>> This allows users to enable or disable preformance or efficiency cores
>> depending on their requirements. After change a reboot is required.
>>
>> Signed-off-by: Luke D. Jones <luke@...nes.dev>
>> ---
>> drivers/platform/x86/asus-armoury.c | 227 +++++++++++++++++++++
>> drivers/platform/x86/asus-armoury.h | 28 +++
>> include/linux/platform_data/x86/asus-wmi.h | 4 +
>> 3 files changed, 259 insertions(+)
>>
>> diff --git a/drivers/platform/x86/asus-armoury.c b/drivers/platform/x86/asus-armoury.c
>> index c4c79a33c56e..6e5bfb2c58e8 100644
>> --- a/drivers/platform/x86/asus-armoury.c
>> +++ b/drivers/platform/x86/asus-armoury.c
>> @@ -40,6 +40,24 @@
>> #define ASUS_MINI_LED_2024_STRONG 0x01
>> #define ASUS_MINI_LED_2024_OFF 0x02
>>
>> +#define ASUS_POWER_CORE_MASK GENMASK(15, 8)
>> +#define ASUS_PERF_CORE_MASK GENMASK(7, 0)
>> +
>> +enum cpu_core_type {
>> + CPU_CORE_PERF = 0,
>> + CPU_CORE_POWER,
>> +};
>> +
>> +enum cpu_core_value {
>> + CPU_CORE_DEFAULT = 0,
>> + CPU_CORE_MIN,
>> + CPU_CORE_MAX,
>> + CPU_CORE_CURRENT,
>> +};
>> +
>> +#define CPU_PERF_CORE_COUNT_MIN 4
>> +#define CPU_POWR_CORE_COUNT_MIN 0
>> +
>> /* Default limits for tunables available on ASUS ROG laptops */
>> #define NVIDIA_BOOST_MIN 5
>> #define NVIDIA_BOOST_MAX 25
>> @@ -85,6 +103,13 @@ struct rog_tunables {
>> u32 dgpu_tgp_min;
>> u32 dgpu_tgp_max;
>> u32 dgpu_tgp;
>> +
>> + u32 cur_perf_cores;
>> + u32 min_perf_cores;
>> + u32 max_perf_cores;
>> + u32 cur_power_cores;
>> + u32 min_power_cores;
>> + u32 max_power_cores;
>> };
>>
>> static const struct class *fw_attr_class;
>> @@ -143,6 +168,8 @@ static struct kobj_attribute pending_reboot = __ATTR_RO(pending_reboot);
>> static bool asus_bios_requires_reboot(struct kobj_attribute *attr)
>> {
>> return !strcmp(attr->attr.name, "gpu_mux_mode") ||
>> + !strcmp(attr->attr.name, "cores_performance") ||
>> + !strcmp(attr->attr.name, "cores_efficiency") ||
>> !strcmp(attr->attr.name, "panel_hd_mode");
>> }
>>
>> @@ -579,6 +606,200 @@ static ssize_t apu_mem_possible_values_show(struct kobject *kobj, struct kobj_at
>> }
>> ATTR_GROUP_ENUM_CUSTOM(apu_mem, "apu_mem", "Set available system RAM (in GB) for the APU to use");
>>
>> +static int init_max_cpu_cores(void)
>> +{
>> + u32 cores;
>> + int err;
>> +
>> + if (!asus_wmi_is_present(ASUS_WMI_DEVID_CORES_MAX))
>> + return 0;
>> +
>> +
>> + err = asus_wmi_get_devstate_dsts(ASUS_WMI_DEVID_CORES_MAX, &cores);
>> + if (err)
>> + return err;
>> +
>> + cores &= ~ASUS_WMI_DSTS_PRESENCE_BIT;
>> + asus_armoury.rog_tunables->max_power_cores = FIELD_GET(ASUS_POWER_CORE_MASK, cores);
>> + asus_armoury.rog_tunables->max_perf_cores = FIELD_GET(ASUS_PERF_CORE_MASK, cores);
>> +
>> + cores = 0;
>> + err = asus_wmi_get_devstate_dsts(ASUS_WMI_DEVID_CORES, &cores);
>> + if (err) {
>> + pr_err("Could not get CPU core count: error %d", err);
>> + return err;
>> + }
>> +
>> + asus_armoury.rog_tunables->cur_perf_cores = FIELD_GET(ASUS_PERF_CORE_MASK, cores);
>> + asus_armoury.rog_tunables->cur_power_cores = FIELD_GET(ASUS_POWER_CORE_MASK, cores);
>> +
>> + asus_armoury.rog_tunables->min_perf_cores = CPU_PERF_CORE_COUNT_MIN;
>> + asus_armoury.rog_tunables->min_power_cores = CPU_POWR_CORE_COUNT_MIN;
>> +
>> + return 0;
>> +}
>> +
>> +static ssize_t cores_value_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf,
>> + enum cpu_core_type core_type, enum cpu_core_value core_value)
>> +{
>> + u32 cores;
>> +
>> + switch (core_value) {
>> + case CPU_CORE_DEFAULT:
>> + case CPU_CORE_MAX:
>> + if (core_type == CPU_CORE_PERF)
>> + return sysfs_emit(buf, "%d\n",
>> + asus_armoury.rog_tunables->max_perf_cores);
>> + else
>> + return sysfs_emit(buf, "%d\n",
>> + asus_armoury.rog_tunables->max_power_cores);
>> + case CPU_CORE_MIN:
>> + if (core_type == CPU_CORE_PERF)
>> + return sysfs_emit(buf, "%d\n",
>> + asus_armoury.rog_tunables->min_perf_cores);
>> + else
>> + return sysfs_emit(buf, "%d\n",
>> + asus_armoury.rog_tunables->min_power_cores);
>> + default:
>> + break;
>> + }
>> +
>> + if (core_type == CPU_CORE_PERF)
>> + cores = asus_armoury.rog_tunables->cur_perf_cores;
>> + else
>> + cores = asus_armoury.rog_tunables->cur_power_cores;
>> +
>> + return sysfs_emit(buf, "%d\n", cores);
>> +}
>> +
>> +static ssize_t cores_current_value_store(struct kobject *kobj, struct kobj_attribute *attr,
>> + const char *buf, enum cpu_core_type core_type)
>> +{
>> + int result, err;
>> + u32 new_cores, perf_cores, powr_cores, out_val, min, max;
>> +
>> + result = kstrtou32(buf, 10, &new_cores);
>> + if (result)
>> + return result;
>> +
>> + if (core_type == CPU_CORE_PERF) {
>> + perf_cores = new_cores;
>> + powr_cores = out_val = asus_armoury.rog_tunables->cur_power_cores;
>> + min = asus_armoury.rog_tunables->min_perf_cores;
>> + max = asus_armoury.rog_tunables->max_perf_cores;
>> + } else {
>> + perf_cores = asus_armoury.rog_tunables->cur_perf_cores;
>> + powr_cores = out_val = new_cores;
>> + min = asus_armoury.rog_tunables->min_power_cores;
>> + max = asus_armoury.rog_tunables->max_power_cores;
>> + }
>> +
>> + if (new_cores < min || new_cores > max)
>> + return -EINVAL;
>> +
>> + out_val = 0;
>> + out_val |= FIELD_PREP(ASUS_PERF_CORE_MASK, perf_cores);
>> + out_val |= FIELD_PREP(ASUS_POWER_CORE_MASK, powr_cores);
>> +
>> + mutex_lock(&asus_armoury.mutex);
>> + err = asus_wmi_set_devstate(ASUS_WMI_DEVID_CORES, out_val, &result);
>> + mutex_unlock(&asus_armoury.mutex);
>> +
>> + if (err) {
>> + pr_warn("Failed to set CPU core count: %d\n", err);
>> + return err;
>> + }
>> +
>> + if (result > 1) {
>> + pr_warn("Failed to set CPU core count (result): 0x%x\n", result);
>> + return -EIO;
>> + }
>> +
>> + pr_info("CPU core count changed, reboot required\n");
>> + sysfs_notify(kobj, NULL, attr->attr.name);
>> + asus_set_reboot_and_signal_event();
>> +
>> + return 0;
>> +}
>> +
>> +static ssize_t cores_performance_min_value_show(struct kobject *kobj,
>> + struct kobj_attribute *attr, char *buf)
>> +{
>> + return cores_value_show(kobj, attr, buf, CPU_CORE_PERF, CPU_CORE_MIN);
>> +}
>> +
>> +static ssize_t cores_performance_max_value_show(struct kobject *kobj,
>> + struct kobj_attribute *attr, char *buf)
>> +{
>> + return cores_value_show(kobj, attr, buf, CPU_CORE_PERF, CPU_CORE_MAX);
>> +}
>> +
>> +static ssize_t cores_performance_default_value_show(struct kobject *kobj,
>> + struct kobj_attribute *attr, char *buf)
>> +{
>> + return cores_value_show(kobj, attr, buf, CPU_CORE_PERF, CPU_CORE_DEFAULT);
>> +}
>> +
>
> I don't really understand the difference with CPU_CORE_MAX and
> CPU_CORE_DEFAULT at least as it pertains to sysfs. Aren't they
> returning the same exact data? Why do they need their own sysfs files?
I guess I added as it felt like it should be there since `default` is part of the API. Like trying to fill in all of what felt expected to be there.
In the end it doesn't make any difference except maybe clarity? What is the default is it min or max?
>> +static ssize_t cores_performance_current_value_show(struct kobject *kobj,
>> + struct kobj_attribute *attr, char *buf)
>> +{
>> + return cores_value_show(kobj, attr, buf, CPU_CORE_PERF, CPU_CORE_CURRENT);
>> +}
>> +
>> +static ssize_t cores_performance_current_value_store(struct kobject *kobj,
>> + struct kobj_attribute *attr,
>> + const char *buf, size_t count)
>> +{
>> + int err;
>> +
>> + err = cores_current_value_store(kobj, attr, buf, CPU_CORE_PERF);
>> + if (err)
>> + return err;
>> +
>> + return count;
>> +}
>> +ATTR_GROUP_CORES_RW(cores_performance, "cores_performance",
>> + "Set the max available performance cores");
>> +
>> +static ssize_t cores_efficiency_min_value_show(struct kobject *kobj, struct kobj_attribute *attr,
>> + char *buf)
>> +{
>> + return cores_value_show(kobj, attr, buf, CPU_CORE_POWER, CPU_CORE_MIN);
>> +}
>> +
>> +static ssize_t cores_efficiency_max_value_show(struct kobject *kobj, struct kobj_attribute *attr,
>> + char *buf)
>> +{
>> + return cores_value_show(kobj, attr, buf, CPU_CORE_POWER, CPU_CORE_MAX);
>> +}
>> +
>> +static ssize_t cores_efficiency_default_value_show(struct kobject *kobj,
>> + struct kobj_attribute *attr, char *buf)
>> +{
>> + return cores_value_show(kobj, attr, buf, CPU_CORE_POWER, CPU_CORE_DEFAULT);
>> +}
>> +
>> +static ssize_t cores_efficiency_current_value_show(struct kobject *kobj,
>> + struct kobj_attribute *attr, char *buf)
>> +{
>> + return cores_value_show(kobj, attr, buf, CPU_CORE_POWER, CPU_CORE_CURRENT);
>> +}
>> +
>> +static ssize_t cores_efficiency_current_value_store(struct kobject *kobj,
>> + struct kobj_attribute *attr, const char *buf,
>> + size_t count)
>> +{
>> + int err;
>> +
>> + err = cores_current_value_store(kobj, attr, buf, CPU_CORE_POWER);
>> + if (err)
>> + return err;
>> +
>> + return count;
>> +}
>> +ATTR_GROUP_CORES_RW(cores_efficiency, "cores_efficiency",
>> + "Set the max available efficiency cores");
>> +
>> /* Simple attribute creation */
>> ATTR_GROUP_ROG_TUNABLE(ppt_pl1_spl, "ppt_pl1_spl", ASUS_WMI_DEVID_PPT_PL1_SPL, cpu_default,
>> cpu_min, cpu_max, 1, "Set the CPU slow package limit");
>> @@ -635,6 +856,8 @@ static const struct asus_attr_group armoury_attr_groups[] = {
>> { &dgpu_base_tgp_attr_group, ASUS_WMI_DEVID_DGPU_BASE_TGP },
>> { &dgpu_tgp_attr_group, ASUS_WMI_DEVID_DGPU_SET_TGP },
>> { &apu_mem_attr_group, ASUS_WMI_DEVID_APU_MEM },
>> + { &cores_efficiency_attr_group, ASUS_WMI_DEVID_CORES_MAX },
>> + { &cores_performance_attr_group, ASUS_WMI_DEVID_CORES_MAX },
>>
>> { &charge_mode_attr_group, ASUS_WMI_DEVID_CHARGE_MODE },
>> { &boot_sound_attr_group, ASUS_WMI_DEVID_BOOT_SOUND },
>> @@ -747,6 +970,7 @@ static void init_rog_tunables(struct rog_tunables *rog)
>> * "ROG Flow X16 GV601VV_GV601VV_00185149B".
>> * The bulk of these defaults are gained from users reporting what
>> * ASUS Armoury Crate in Windows provides them.
>> + * This should be turned in to a tabe eventually.
>> */
>> product = dmi_get_system_info(DMI_PRODUCT_NAME);
>>
>> @@ -831,6 +1055,9 @@ static int __init asus_fw_init(void)
>> return -ENOMEM;
>>
>> init_rog_tunables(asus_armoury.rog_tunables);
>> + err = init_max_cpu_cores();
>> + if (err)
>> + return err;
>>
>> err = asus_fw_attr_add();
>> if (err)
>> diff --git a/drivers/platform/x86/asus-armoury.h b/drivers/platform/x86/asus-armoury.h
>> index e08459cad942..04b88f7d2421 100644
>> --- a/drivers/platform/x86/asus-armoury.h
>> +++ b/drivers/platform/x86/asus-armoury.h
>> @@ -167,6 +167,34 @@ static ssize_t enum_type_show(struct kobject *kobj, struct kobj_attribute *attr,
>> .name = _fsname, .attrs = _attrname##_attrs \
>> }
>>
>> +/* CPU core attributes need a little different in setup */
>> +#define ATTR_GROUP_CORES_RW(_attrname, _fsname, _dispname) \
>> + __ATTR_SHOW_FMT(scalar_increment, _attrname, "%d\n", 1); \
>> + __ATTR_SHOW_FMT(display_name, _attrname, "%s\n", _dispname); \
>> + static struct kobj_attribute attr_##_attrname##_current_value = \
>> + __ASUS_ATTR_RW(_attrname, current_value); \
>> + static struct kobj_attribute attr_##_attrname##_default_value = \
>> + __ASUS_ATTR_RO(_attrname, default_value); \
>> + static struct kobj_attribute attr_##_attrname##_min_value = \
>> + __ASUS_ATTR_RO(_attrname, min_value); \
>> + static struct kobj_attribute attr_##_attrname##_max_value = \
>> + __ASUS_ATTR_RO(_attrname, max_value); \
>> + static struct kobj_attribute attr_##_attrname##_type = \
>> + __ASUS_ATTR_RO_AS(type, int_type_show); \
>> + static struct attribute *_attrname##_attrs[] = { \
>> + &attr_##_attrname##_current_value.attr, \
>> + &attr_##_attrname##_default_value.attr, \
>> + &attr_##_attrname##_min_value.attr, \
>> + &attr_##_attrname##_max_value.attr, \
>> + &attr_##_attrname##_scalar_increment.attr, \
>> + &attr_##_attrname##_display_name.attr, \
>> + &attr_##_attrname##_type.attr, \
>> + NULL \
>> + }; \
>> + static const struct attribute_group _attrname##_attr_group = { \
>> + .name = _fsname, .attrs = _attrname##_attrs \
>> + }
>> +
>> /*
>> * ROG PPT attributes need a little different in setup as they
>> * require rog_tunables members.
>> diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
>> index 88bf250dc8ca..cc21e4272460 100644
>> --- a/include/linux/platform_data/x86/asus-wmi.h
>> +++ b/include/linux/platform_data/x86/asus-wmi.h
>> @@ -137,6 +137,10 @@
>> /* dgpu on/off */
>> #define ASUS_WMI_DEVID_DGPU 0x00090020
>>
>> +/* Intel E-core and P-core configuration in a format 0x0[E]0[P] */
>> +#define ASUS_WMI_DEVID_CORES 0x001200D2
>> + /* Maximum Intel E-core and P-core availability */
>> +#define ASUS_WMI_DEVID_CORES_MAX 0x001200D3
>> #define ASUS_WMI_DEVID_DGPU_BASE_TGP 0x00120099
>> #define ASUS_WMI_DEVID_DGPU_SET_TGP 0x00120098
>> #define ASUS_WMI_DEVID_APU_MEM 0x000600C1
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