linux-kernel - Re: [PATCH V2 1/3] thermal/int340x

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Date:   Fri, 29 May 2020 06:00:16 +0000
From:   "Pandruvada, Srinivas" <srinivas.pandruvada@...el.com>
To:     "matthewgarrett@...gle.com" <matthewgarrett@...gle.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     "Zhang, Rui" <rui.zhang@...el.com>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "Aram, Nisha" <nisha.aram@...el.com>,
        "mjg59@...gle.com" <mjg59@...gle.com>
Subject: Re: [PATCH V2 1/3] thermal/int340x_thermal: Export GDDV

On Mon, 2020-05-18 at 23:18 +0000, Pandruvada, Srinivas wrote:
> On Mon, 2020-04-13 at 19:09 -0700, Matthew Garrett wrote:
> > From: Matthew Garrett <mjg59@...gle.com>
> > 
> > Implementing DPTF properly requires making use of firmware-provided
> > information associated with the INT3400 device. Calling GDDV
> > provides
> > a
> > buffer of information which userland can then interpret to
> > determine
> > appropriate DPTF policy.
> > 
> > Signed-off-by: Matthew Garrett <mjg59@...gle.com>
> Tested-by: Pandruvada, Srinivas <srinivas.pandruvada@...ux.intel.com>

Can we take this series for 5.8?

Thanks,
Srinivas

> 
> > ---
> >  .../intel/int340x_thermal/int3400_thermal.c   | 60
> > +++++++++++++++++++
> >  1 file changed, 60 insertions(+)
> > 
> > diff --git
> > a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> > b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> > index ceef89c956bd4..00a7732724cd0 100644
> > --- a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> > +++ b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> > @@ -52,6 +52,25 @@ struct int3400_thermal_priv {
> >  	u8 uuid_bitmap;
> >  	int rel_misc_dev_res;
> >  	int current_uuid_index;
> > +	char *data_vault;
> > +};
> > +
> > +static ssize_t data_vault_read(struct file *file, struct kobject
> > *kobj,
> > +	     struct bin_attribute *attr, char *buf, loff_t off, size_t
> > count)
> > +{
> > +	memcpy(buf, attr->private + off, count);
> > +	return count;
> > +}
> > +
> > +static BIN_ATTR_RO(data_vault, 0);
> > +
> > +static struct bin_attribute *data_attributes[] = {
> > +	&bin_attr_data_vault,
> > +	NULL,
> > +};
> > +
> > +static const struct attribute_group data_attribute_group = {
> > +	.bin_attrs = data_attributes,
> >  };
> >  
> >  static ssize_t available_uuids_show(struct device *dev,
> > @@ -278,6 +297,32 @@ static struct thermal_zone_params
> > int3400_thermal_params = {
> >  	.no_hwmon = true,
> >  };
> >  
> > +static void int3400_setup_gddv(struct int3400_thermal_priv *priv)
> > +{
> > +	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
> > +	union acpi_object *obj;
> > +	acpi_status status;
> > +
> > +	status = acpi_evaluate_object(priv->adev->handle, "GDDV", NULL,
> > +				      &buffer);
> > +	if (ACPI_FAILURE(status) || !buffer.length)
> > +		return;
> > +
> > +	obj = buffer.pointer;
> > +	if (obj->type != ACPI_TYPE_PACKAGE || obj->package.count != 1
> > +	    || obj->package.elements[0].type != ACPI_TYPE_BUFFER) {
> > +		kfree(buffer.pointer);
> > +		return;
> > +	}
> > +
> > +	priv->data_vault = kmemdup(obj-
> > > package.elements[0].buffer.pointer,
> > +				   obj-
> > > package.elements[0].buffer.length,
> > +				   GFP_KERNEL);
> > +	bin_attr_data_vault.private = priv->data_vault;
> > +	bin_attr_data_vault.size = obj-
> > > package.elements[0].buffer.length;
> > +	kfree(buffer.pointer);
> > +}
> > +
> >  static int int3400_thermal_probe(struct platform_device *pdev)
> >  {
> >  	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
> > @@ -309,6 +354,8 @@ static int int3400_thermal_probe(struct
> > platform_device *pdev)
> >  
> >  	platform_set_drvdata(pdev, priv);
> >  
> > +	int3400_setup_gddv(priv);
> > +
> >  	int3400_thermal_ops.get_mode = int3400_thermal_get_mode;
> >  	int3400_thermal_ops.set_mode = int3400_thermal_set_mode;
> >  
> > @@ -327,6 +374,13 @@ static int int3400_thermal_probe(struct
> > platform_device *pdev)
> >  	if (result)
> >  		goto free_rel_misc;
> >  
> > +	if (priv->data_vault) {
> > +		result = sysfs_create_group(&pdev->dev.kobj,
> > +					    &data_attribute_group);
> > +		if (result)
> > +			goto free_uuid;
> > +	}
> > +
> >  	result = acpi_install_notify_handler(
> >  			priv->adev->handle, ACPI_DEVICE_NOTIFY,
> > int3400_notify,
> >  			(void *)priv);
> > @@ -336,6 +390,9 @@ static int int3400_thermal_probe(struct
> > platform_device *pdev)
> >  	return 0;
> >  
> >  free_sysfs:
> > +	if (priv->data_vault)
> > +		sysfs_remove_group(&pdev->dev.kobj,
> > &data_attribute_group);
> > +free_uuid:
> >  	sysfs_remove_group(&pdev->dev.kobj, &uuid_attribute_group);
> >  free_rel_misc:
> >  	if (!priv->rel_misc_dev_res)
> > @@ -360,8 +417,11 @@ static int int3400_thermal_remove(struct
> > platform_device *pdev)
> >  	if (!priv->rel_misc_dev_res)
> >  		acpi_thermal_rel_misc_device_remove(priv->adev-
> > > handle);
> >  
> > +	if (priv->data_vault)
> > +		sysfs_remove_group(&pdev->dev.kobj,
> > &data_attribute_group);
> >  	sysfs_remove_group(&pdev->dev.kobj, &uuid_attribute_group);
> >  	thermal_zone_device_unregister(priv->thermal);
> > +	kfree(priv->data_vault);
> >  	kfree(priv->trts);
> >  	kfree(priv->arts);
> >  	kfree(priv);