Merge branches 'acpi-ec', 'acpi-sysfs', 'acpi-utils' and 'acpi-soc'

Merge an ACPI EC driver update, ACPI sysfs interface updates, an ACPI
library function update, and an ACPI APD driver update for 6.12-rc1:

 - Do not release locks during operation region accesses in the ACPI EC
   driver (Rafael Wysocki).

 - Fix up the _STR handling in the ACPI device object sysfs interface,
   make it represent the device object attributes as an attribute group
   and make it rely on driver core functionality for sysfs attrubute
   management (Thomas Weißschuh).

 - Extend error messages printed to the kernel log when acpi_evaluate_dsm()
   fails to include revision and function number (David Wang).

 - Add a new AMDI0015 platform device ID to the ACPi APD driver for AMD
   SoCs (Shyam Sundar S K).

* acpi-ec:
  ACPI: EC: Do not release locks during operation region accesses

* acpi-sysfs:
  ACPI: sysfs: remove return value of acpi_device_setup_files()
  ACPI: sysfs: manage sysfs attributes through device core
  ACPI: sysfs: manage attributes as attribute_group
  ACPI: sysfs: evaluate _STR on each sysfs access
  ACPI: sysfs: validate return type of _STR method

* acpi-utils:
  ACPI: utils: Add rev/func to message when acpi_evaluate_dsm() fails

* acpi-soc:
  ACPI: APD: Add AMDI0015 as platform device

Author: rafaeljw

drivers/acpi/acpi_apd.c

@@ -118,6 +118,11 @@ static const struct apd_device_desc wt_i2c_desc = {
 	.fixed_clk_rate = 150000000,
 };
 
+static const struct apd_device_desc wt_i3c_desc = {
+	.setup = acpi_apd_setup,
+	.fixed_clk_rate = 125000000,
+};
+
 static struct property_entry uart_properties[] = {
 	PROPERTY_ENTRY_U32("reg-io-width", 4),
 	PROPERTY_ENTRY_U32("reg-shift", 2),
@@ -231,6 +236,7 @@ static const struct acpi_device_id acpi_apd_device_ids[] = {
 	{ "AMD0030", },
 	{ "AMD0040", APD_ADDR(fch_misc_desc)},
 	{ "AMDI0010", APD_ADDR(wt_i2c_desc) },
+	{ "AMDI0015", APD_ADDR(wt_i3c_desc) },
 	{ "AMDI0019", APD_ADDR(wt_i2c_desc) },
 	{ "AMDI0020", APD_ADDR(cz_uart_desc) },
 	{ "AMDI0022", APD_ADDR(cz_uart_desc) },

drivers/acpi/device_sysfs.c

@@ -439,23 +439,33 @@ static ssize_t description_show(struct device *dev,
 				char *buf)
 {
 	struct acpi_device *acpi_dev = to_acpi_device(dev);
+	struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+	union acpi_object *str_obj;
+	acpi_status status;
 	int result;
 
-	if (acpi_dev->pnp.str_obj == NULL)
-		return 0;
+	status = acpi_evaluate_object_typed(acpi_dev->handle, "_STR",
+					    NULL, &buffer,
+					    ACPI_TYPE_BUFFER);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	str_obj = buffer.pointer;
 
 	/*
 	 * The _STR object contains a Unicode identifier for a device.
 	 * We need to convert to utf-8 so it can be displayed.
 	 */
 	result = utf16s_to_utf8s(
-		(wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer,
-		acpi_dev->pnp.str_obj->buffer.length,
+		(wchar_t *)str_obj->buffer.pointer,
+		str_obj->buffer.length,
 		UTF16_LITTLE_ENDIAN, buf,
 		PAGE_SIZE - 1);
 
 	buf[result++] = '\n';
 
+	kfree(str_obj);
+
 	return result;
 }
 static DEVICE_ATTR_RO(description);
@@ -507,96 +517,97 @@ static ssize_t status_show(struct device *dev, struct device_attribute *attr,
 }
 static DEVICE_ATTR_RO(status);
 
-/**
- * acpi_device_setup_files - Create sysfs attributes of an ACPI device.
- * @dev: ACPI device object.
- */
-int acpi_device_setup_files(struct acpi_device *dev)
-{
-	struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
-	acpi_status status;
-	int result = 0;
+static struct attribute *acpi_attrs[] = {
+	&dev_attr_path.attr,
+	&dev_attr_hid.attr,
+	&dev_attr_modalias.attr,
+	&dev_attr_description.attr,
+	&dev_attr_adr.attr,
+	&dev_attr_uid.attr,
+	&dev_attr_sun.attr,
+	&dev_attr_hrv.attr,
+	&dev_attr_status.attr,
+	&dev_attr_eject.attr,
+	&dev_attr_power_state.attr,
+	&dev_attr_real_power_state.attr,
+	NULL
+};
 
+static bool acpi_show_attr(struct acpi_device *dev, const struct device_attribute *attr)
+{
 	/*
 	 * Devices gotten from FADT don't have a "path" attribute
 	 */
-	if (dev->handle) {
-		result = device_create_file(&dev->dev, &dev_attr_path);
-		if (result)
-			goto end;
-	}
+	if (attr == &dev_attr_path)
+		return dev->handle;
 
-	if (!list_empty(&dev->pnp.ids)) {
-		result = device_create_file(&dev->dev, &dev_attr_hid);
-		if (result)
-			goto end;
+	if (attr == &dev_attr_hid || attr == &dev_attr_modalias)
+		return !list_empty(&dev->pnp.ids);
 
-		result = device_create_file(&dev->dev, &dev_attr_modalias);
-		if (result)
-			goto end;
-	}
+	if (attr == &dev_attr_description)
+		return acpi_has_method(dev->handle, "_STR");
 
-	/*
-	 * If device has _STR, 'description' file is created
-	 */
-	if (acpi_has_method(dev->handle, "_STR")) {
-		status = acpi_evaluate_object(dev->handle, "_STR",
-					NULL, &buffer);
-		if (ACPI_FAILURE(status))
-			buffer.pointer = NULL;
-		dev->pnp.str_obj = buffer.pointer;
-		result = device_create_file(&dev->dev, &dev_attr_description);
-		if (result)
-			goto end;
-	}
+	if (attr == &dev_attr_adr)
+		return dev->pnp.type.bus_address;
 
-	if (dev->pnp.type.bus_address)
-		result = device_create_file(&dev->dev, &dev_attr_adr);
-	if (acpi_device_uid(dev))
-		result = device_create_file(&dev->dev, &dev_attr_uid);
+	if (attr == &dev_attr_uid)
+		return acpi_device_uid(dev);
 
-	if (acpi_has_method(dev->handle, "_SUN")) {
-		result = device_create_file(&dev->dev, &dev_attr_sun);
-		if (result)
-			goto end;
-	}
+	if (attr == &dev_attr_sun)
+		return acpi_has_method(dev->handle, "_SUN");
 
-	if (acpi_has_method(dev->handle, "_HRV")) {
-		result = device_create_file(&dev->dev, &dev_attr_hrv);
-		if (result)
-			goto end;
-	}
+	if (attr == &dev_attr_hrv)
+		return acpi_has_method(dev->handle, "_HRV");
 
-	if (acpi_has_method(dev->handle, "_STA")) {
-		result = device_create_file(&dev->dev, &dev_attr_status);
-		if (result)
-			goto end;
-	}
+	if (attr == &dev_attr_status)
+		return acpi_has_method(dev->handle, "_STA");
 
 	/*
 	 * If device has _EJ0, 'eject' file is created that is used to trigger
 	 * hot-removal function from userland.
 	 */
-	if (acpi_has_method(dev->handle, "_EJ0")) {
-		result = device_create_file(&dev->dev, &dev_attr_eject);
-		if (result)
-			return result;
-	}
+	if (attr == &dev_attr_eject)
+		return acpi_has_method(dev->handle, "_EJ0");
 
-	if (dev->flags.power_manageable) {
-		result = device_create_file(&dev->dev, &dev_attr_power_state);
-		if (result)
-			return result;
+	if (attr == &dev_attr_power_state)
+		return dev->flags.power_manageable;
 
-		if (dev->power.flags.power_resources)
-			result = device_create_file(&dev->dev,
-						    &dev_attr_real_power_state);
-	}
+	if (attr == &dev_attr_real_power_state)
+		return dev->flags.power_manageable && dev->power.flags.power_resources;
 
-	acpi_expose_nondev_subnodes(&dev->dev.kobj, &dev->data);
+	dev_warn_once(&dev->dev, "Unexpected attribute: %s\n", attr->attr.name);
+	return false;
+}
 
-end:
-	return result;
+static umode_t acpi_attr_is_visible(struct kobject *kobj,
+				    struct attribute *attr,
+				    int attrno)
+{
+	struct acpi_device *dev = to_acpi_device(kobj_to_dev(kobj));
+
+	if (acpi_show_attr(dev, container_of(attr, struct device_attribute, attr)))
+		return attr->mode;
+	else
+		return 0;
+}
+
+static const struct attribute_group acpi_group = {
+	.attrs = acpi_attrs,
+	.is_visible = acpi_attr_is_visible,
+};
+
+const struct attribute_group *acpi_groups[] = {
+	&acpi_group,
+	NULL
+};
+
+/**
+ * acpi_device_setup_files - Create sysfs attributes of an ACPI device.
+ * @dev: ACPI device object.
+ */
+void acpi_device_setup_files(struct acpi_device *dev)
+{
+	acpi_expose_nondev_subnodes(&dev->dev.kobj, &dev->data);
 }
 
 /**
@@ -606,41 +617,4 @@ int acpi_device_setup_files(struct acpi_device *dev)
 void acpi_device_remove_files(struct acpi_device *dev)
 {
 	acpi_hide_nondev_subnodes(&dev->data);
-
-	if (dev->flags.power_manageable) {
-		device_remove_file(&dev->dev, &dev_attr_power_state);
-		if (dev->power.flags.power_resources)
-			device_remove_file(&dev->dev,
-					   &dev_attr_real_power_state);
-	}
-
-	/*
-	 * If device has _STR, remove 'description' file
-	 */
-	if (acpi_has_method(dev->handle, "_STR")) {
-		kfree(dev->pnp.str_obj);
-		device_remove_file(&dev->dev, &dev_attr_description);
-	}
-	/*
-	 * If device has _EJ0, remove 'eject' file.
-	 */
-	if (acpi_has_method(dev->handle, "_EJ0"))
-		device_remove_file(&dev->dev, &dev_attr_eject);
-
-	if (acpi_has_method(dev->handle, "_SUN"))
-		device_remove_file(&dev->dev, &dev_attr_sun);
-
-	if (acpi_has_method(dev->handle, "_HRV"))
-		device_remove_file(&dev->dev, &dev_attr_hrv);
-
-	if (acpi_device_uid(dev))
-		device_remove_file(&dev->dev, &dev_attr_uid);
-	if (dev->pnp.type.bus_address)
-		device_remove_file(&dev->dev, &dev_attr_adr);
-	device_remove_file(&dev->dev, &dev_attr_modalias);
-	device_remove_file(&dev->dev, &dev_attr_hid);
-	if (acpi_has_method(dev->handle, "_STA"))
-		device_remove_file(&dev->dev, &dev_attr_status);
-	if (dev->handle)
-		device_remove_file(&dev->dev, &dev_attr_path);
 }

drivers/acpi/ec.c

@@ -783,6 +783,9 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec,
 	unsigned long tmp;
 	int ret = 0;
 
+	if (t->rdata)
+		memset(t->rdata, 0, t->rlen);
+
 	/* start transaction */
 	spin_lock_irqsave(&ec->lock, tmp);
 	/* Enable GPE for command processing (IBF=0/OBF=1) */
@@ -819,8 +822,6 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)
 
 	if (!ec || (!t) || (t->wlen && !t->wdata) || (t->rlen && !t->rdata))
 		return -EINVAL;
-	if (t->rdata)
-		memset(t->rdata, 0, t->rlen);
 
 	mutex_lock(&ec->mutex);
 	if (ec->global_lock) {
@@ -847,7 +848,7 @@ static int acpi_ec_burst_enable(struct acpi_ec *ec)
 				.wdata = NULL, .rdata = &d,
 				.wlen = 0, .rlen = 1};
 
-	return acpi_ec_transaction(ec, &t);
+	return acpi_ec_transaction_unlocked(ec, &t);
 }
 
 static int acpi_ec_burst_disable(struct acpi_ec *ec)
@@ -857,7 +858,7 @@ static int acpi_ec_burst_disable(struct acpi_ec *ec)
 				.wlen = 0, .rlen = 0};
 
 	return (acpi_ec_read_status(ec) & ACPI_EC_FLAG_BURST) ?
-				acpi_ec_transaction(ec, &t) : 0;
+				acpi_ec_transaction_unlocked(ec, &t) : 0;
 }
 
 static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 *data)
@@ -873,6 +874,19 @@ static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 *data)
 	return result;
 }
 
+static int acpi_ec_read_unlocked(struct acpi_ec *ec, u8 address, u8 *data)
+{
+	int result;
+	u8 d;
+	struct transaction t = {.command = ACPI_EC_COMMAND_READ,
+				.wdata = &address, .rdata = &d,
+				.wlen = 1, .rlen = 1};
+
+	result = acpi_ec_transaction_unlocked(ec, &t);
+	*data = d;
+	return result;
+}
+
 static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data)
 {
 	u8 wdata[2] = { address, data };
@@ -883,6 +897,16 @@ static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data)
 	return acpi_ec_transaction(ec, &t);
 }
 
+static int acpi_ec_write_unlocked(struct acpi_ec *ec, u8 address, u8 data)
+{
+	u8 wdata[2] = { address, data };
+	struct transaction t = {.command = ACPI_EC_COMMAND_WRITE,
+				.wdata = wdata, .rdata = NULL,
+				.wlen = 2, .rlen = 0};
+
+	return acpi_ec_transaction_unlocked(ec, &t);
+}
+
 int ec_read(u8 addr, u8 *val)
 {
 	int err;
@@ -1323,27 +1347,46 @@ acpi_ec_space_handler(u32 function, acpi_physical_address address,
 	struct acpi_ec *ec = handler_context;
 	int result = 0, i, bytes = bits / 8;
 	u8 *value = (u8 *)value64;
+	u32 glk;
 
 	if ((address > 0xFF) || !value || !handler_context)
 		return AE_BAD_PARAMETER;
 
 	if (function != ACPI_READ && function != ACPI_WRITE)
 		return AE_BAD_PARAMETER;
 
+	mutex_lock(&ec->mutex);
+
+	if (ec->global_lock) {
+		acpi_status status;
+
+		status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
+		if (ACPI_FAILURE(status)) {
+			result = -ENODEV;
+			goto unlock;
+		}
+	}
+
 	if (ec->busy_polling || bits > 8)
 		acpi_ec_burst_enable(ec);
 
 	for (i = 0; i < bytes; ++i, ++address, ++value) {
 		result = (function == ACPI_READ) ?
-			acpi_ec_read(ec, address, value) :
-			acpi_ec_write(ec, address, *value);
+			acpi_ec_read_unlocked(ec, address, value) :
+			acpi_ec_write_unlocked(ec, address, *value);
 		if (result < 0)
 			break;
 	}
 
 	if (ec->busy_polling || bits > 8)
 		acpi_ec_burst_disable(ec);
 
+	if (ec->global_lock)
+		acpi_release_global_lock(glk);
+
+unlock:
+	mutex_unlock(&ec->mutex);
+
 	switch (result) {
 	case -EINVAL:
 		return AE_BAD_PARAMETER;