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https://mirrors.bfsu.edu.cn/git/linux.git
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Merge branch 'acpi-scan'
* acpi-scan: ACPI / scan: Rework modalias creation when "compatible" is present ACPI / scan: Take the PRP0001 position in the list of IDs into account ACPI / scan: Simplify acpi_match_device() ACPI / scan: Generalize of_compatible matching ACPI / scan: fix fixed event handler return value
This commit is contained in:
Rafael J. Wysocki
commit
1a7fd41ac2
@ -114,7 +114,12 @@ int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler,
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return 0;
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}
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/*
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/**
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* create_pnp_modalias - Create hid/cid(s) string for modalias and uevent
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* @acpi_dev: ACPI device object.
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* @modalias: Buffer to print into.
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* @size: Size of the buffer.
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*
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* Creates hid/cid(s) string needed for modalias and uevent
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* e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get:
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* char *modalias: "acpi:IBM0001:ACPI0001"
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@ -122,68 +127,98 @@ int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler,
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* -EINVAL: output error
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* -ENOMEM: output is truncated
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*/
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static int create_modalias(struct acpi_device *acpi_dev, char *modalias,
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int size)
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static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias,
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int size)
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{
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int len;
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int count;
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struct acpi_hardware_id *id;
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if (list_empty(&acpi_dev->pnp.ids))
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/*
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* Since we skip PRP0001 from the modalias below, 0 should be returned
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* if PRP0001 is the only ACPI/PNP ID in the device's list.
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*/
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count = 0;
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list_for_each_entry(id, &acpi_dev->pnp.ids, list)
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if (strcmp(id->id, "PRP0001"))
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count++;
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if (!count)
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return 0;
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/*
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* If the device has PRP0001 we expose DT compatible modalias
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* instead in form of of:NnameTCcompatible.
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*/
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if (acpi_dev->data.of_compatible) {
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struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
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const union acpi_object *of_compatible, *obj;
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int i, nval;
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char *c;
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len = snprintf(modalias, size, "acpi:");
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if (len <= 0)
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return len;
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acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf);
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/* DT strings are all in lower case */
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for (c = buf.pointer; *c != '\0'; c++)
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*c = tolower(*c);
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size -= len;
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len = snprintf(modalias, size, "of:N%sT", (char *)buf.pointer);
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ACPI_FREE(buf.pointer);
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list_for_each_entry(id, &acpi_dev->pnp.ids, list) {
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if (!strcmp(id->id, "PRP0001"))
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continue;
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of_compatible = acpi_dev->data.of_compatible;
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if (of_compatible->type == ACPI_TYPE_PACKAGE) {
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nval = of_compatible->package.count;
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obj = of_compatible->package.elements;
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} else { /* Must be ACPI_TYPE_STRING. */
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nval = 1;
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obj = of_compatible;
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}
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for (i = 0; i < nval; i++, obj++) {
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count = snprintf(&modalias[len], size, "C%s",
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obj->string.pointer);
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if (count < 0)
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return -EINVAL;
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if (count >= size)
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return -ENOMEM;
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count = snprintf(&modalias[len], size, "%s:", id->id);
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if (count < 0)
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return -EINVAL;
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len += count;
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size -= count;
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}
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} else {
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len = snprintf(modalias, size, "acpi:");
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size -= len;
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if (count >= size)
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return -ENOMEM;
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list_for_each_entry(id, &acpi_dev->pnp.ids, list) {
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count = snprintf(&modalias[len], size, "%s:", id->id);
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if (count < 0)
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return -EINVAL;
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if (count >= size)
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return -ENOMEM;
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len += count;
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size -= count;
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}
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len += count;
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size -= count;
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}
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modalias[len] = '\0';
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return len;
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}
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/**
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* create_of_modalias - Creates DT compatible string for modalias and uevent
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* @acpi_dev: ACPI device object.
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* @modalias: Buffer to print into.
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* @size: Size of the buffer.
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*
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* Expose DT compatible modalias as of:NnameTCcompatible. This function should
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* only be called for devices having PRP0001 in their list of ACPI/PNP IDs.
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*/
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static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
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int size)
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{
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struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
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const union acpi_object *of_compatible, *obj;
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int len, count;
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int i, nval;
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char *c;
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acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf);
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/* DT strings are all in lower case */
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for (c = buf.pointer; *c != '\0'; c++)
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*c = tolower(*c);
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len = snprintf(modalias, size, "of:N%sT", (char *)buf.pointer);
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ACPI_FREE(buf.pointer);
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if (len <= 0)
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return len;
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of_compatible = acpi_dev->data.of_compatible;
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if (of_compatible->type == ACPI_TYPE_PACKAGE) {
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nval = of_compatible->package.count;
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obj = of_compatible->package.elements;
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} else { /* Must be ACPI_TYPE_STRING. */
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nval = 1;
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obj = of_compatible;
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}
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for (i = 0; i < nval; i++, obj++) {
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count = snprintf(&modalias[len], size, "C%s",
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obj->string.pointer);
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if (count < 0)
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return -EINVAL;
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if (count >= size)
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return -ENOMEM;
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len += count;
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size -= count;
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}
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modalias[len] = '\0';
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return len;
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}
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@ -194,7 +229,8 @@ static int create_modalias(struct acpi_device *acpi_dev, char *modalias,
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*
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* Check if the given device has an ACPI companion and if that companion has
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* a valid list of PNP IDs, and if the device is the first (primary) physical
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* device associated with it.
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* device associated with it. Return the companion pointer if that's the case
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* or NULL otherwise.
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*
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* If multiple physical devices are attached to a single ACPI companion, we need
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* to be careful. The usage scenario for this kind of relationship is that all
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@ -208,31 +244,67 @@ static int create_modalias(struct acpi_device *acpi_dev, char *modalias,
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* resources available from it but they will be matched normally using functions
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* provided by their bus types (and analogously for their modalias).
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*/
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static bool acpi_companion_match(const struct device *dev)
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static struct acpi_device *acpi_companion_match(const struct device *dev)
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{
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struct acpi_device *adev;
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bool ret;
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adev = ACPI_COMPANION(dev);
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if (!adev)
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return false;
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return NULL;
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if (list_empty(&adev->pnp.ids))
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return false;
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return NULL;
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mutex_lock(&adev->physical_node_lock);
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if (list_empty(&adev->physical_node_list)) {
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ret = false;
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adev = NULL;
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} else {
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const struct acpi_device_physical_node *node;
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node = list_first_entry(&adev->physical_node_list,
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struct acpi_device_physical_node, node);
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ret = node->dev == dev;
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if (node->dev != dev)
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adev = NULL;
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}
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mutex_unlock(&adev->physical_node_lock);
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return ret;
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return adev;
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}
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static int __acpi_device_uevent_modalias(struct acpi_device *adev,
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struct kobj_uevent_env *env)
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{
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int len;
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if (!adev)
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return -ENODEV;
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if (list_empty(&adev->pnp.ids))
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return 0;
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if (add_uevent_var(env, "MODALIAS="))
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return -ENOMEM;
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len = create_pnp_modalias(adev, &env->buf[env->buflen - 1],
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sizeof(env->buf) - env->buflen);
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if (len < 0)
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return len;
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env->buflen += len;
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if (!adev->data.of_compatible)
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return 0;
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if (len > 0 && add_uevent_var(env, "MODALIAS="))
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return -ENOMEM;
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len = create_of_modalias(adev, &env->buf[env->buflen - 1],
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sizeof(env->buf) - env->buflen);
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if (len < 0)
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return len;
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env->buflen += len;
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return 0;
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}
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/*
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@ -243,22 +315,41 @@ static bool acpi_companion_match(const struct device *dev)
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*/
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int acpi_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
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{
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int len;
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if (!acpi_companion_match(dev))
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return -ENODEV;
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if (add_uevent_var(env, "MODALIAS="))
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return -ENOMEM;
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len = create_modalias(ACPI_COMPANION(dev), &env->buf[env->buflen - 1],
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sizeof(env->buf) - env->buflen);
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if (len <= 0)
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return len;
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env->buflen += len;
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return 0;
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return __acpi_device_uevent_modalias(acpi_companion_match(dev), env);
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}
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EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias);
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static int __acpi_device_modalias(struct acpi_device *adev, char *buf, int size)
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{
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int len, count;
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if (!adev)
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return -ENODEV;
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if (list_empty(&adev->pnp.ids))
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return 0;
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len = create_pnp_modalias(adev, buf, size - 1);
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if (len < 0) {
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return len;
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} else if (len > 0) {
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buf[len++] = '\n';
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size -= len;
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}
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if (!adev->data.of_compatible)
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return len;
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count = create_of_modalias(adev, buf + len, size - 1);
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if (count < 0) {
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return count;
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} else if (count > 0) {
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len += count;
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buf[len++] = '\n';
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}
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return len;
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}
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/*
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* Creates modalias sysfs attribute for ACPI enumerated devices.
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* Because the other buses does not support ACPI HIDs & CIDs.
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@ -267,29 +358,13 @@ EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias);
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*/
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int acpi_device_modalias(struct device *dev, char *buf, int size)
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{
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int len;
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if (!acpi_companion_match(dev))
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return -ENODEV;
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len = create_modalias(ACPI_COMPANION(dev), buf, size -1);
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if (len <= 0)
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return len;
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buf[len++] = '\n';
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return len;
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return __acpi_device_modalias(acpi_companion_match(dev), buf, size);
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}
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EXPORT_SYMBOL_GPL(acpi_device_modalias);
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static ssize_t
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acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) {
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struct acpi_device *acpi_dev = to_acpi_device(dev);
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int len;
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len = create_modalias(acpi_dev, buf, 1024);
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if (len <= 0)
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return len;
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buf[len++] = '\n';
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return len;
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return __acpi_device_modalias(to_acpi_device(dev), buf, 1024);
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}
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static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL);
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@ -894,8 +969,51 @@ static void acpi_device_remove_files(struct acpi_device *dev)
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ACPI Bus operations
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-------------------------------------------------------------------------- */
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/**
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* acpi_of_match_device - Match device object using the "compatible" property.
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* @adev: ACPI device object to match.
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* @of_match_table: List of device IDs to match against.
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*
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* If @dev has an ACPI companion which has the special PRP0001 device ID in its
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* list of identifiers and a _DSD object with the "compatible" property, use
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* that property to match against the given list of identifiers.
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*/
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static bool acpi_of_match_device(struct acpi_device *adev,
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const struct of_device_id *of_match_table)
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{
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const union acpi_object *of_compatible, *obj;
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int i, nval;
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if (!adev)
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return false;
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of_compatible = adev->data.of_compatible;
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if (!of_match_table || !of_compatible)
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return false;
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if (of_compatible->type == ACPI_TYPE_PACKAGE) {
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nval = of_compatible->package.count;
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obj = of_compatible->package.elements;
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} else { /* Must be ACPI_TYPE_STRING. */
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nval = 1;
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obj = of_compatible;
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}
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/* Now we can look for the driver DT compatible strings */
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for (i = 0; i < nval; i++, obj++) {
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const struct of_device_id *id;
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for (id = of_match_table; id->compatible[0]; id++)
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if (!strcasecmp(obj->string.pointer, id->compatible))
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return true;
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}
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return false;
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}
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static const struct acpi_device_id *__acpi_match_device(
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struct acpi_device *device, const struct acpi_device_id *ids)
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struct acpi_device *device,
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const struct acpi_device_id *ids,
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const struct of_device_id *of_ids)
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{
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const struct acpi_device_id *id;
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struct acpi_hardware_id *hwid;
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@ -904,14 +1022,27 @@ static const struct acpi_device_id *__acpi_match_device(
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* If the device is not present, it is unnecessary to load device
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* driver for it.
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*/
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if (!device->status.present)
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if (!device || !device->status.present)
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return NULL;
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for (id = ids; id->id[0]; id++)
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list_for_each_entry(hwid, &device->pnp.ids, list)
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list_for_each_entry(hwid, &device->pnp.ids, list) {
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/* First, check the ACPI/PNP IDs provided by the caller. */
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for (id = ids; id->id[0]; id++)
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if (!strcmp((char *) id->id, hwid->id))
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return id;
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/*
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* Next, check the special "PRP0001" ID and try to match the
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* "compatible" property if found.
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*
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* The id returned by the below is not valid, but the only
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* caller passing non-NULL of_ids here is only interested in
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* whether or not the return value is NULL.
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*/
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if (!strcmp("PRP0001", hwid->id)
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&& acpi_of_match_device(device, of_ids))
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return id;
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}
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return NULL;
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}
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@ -929,68 +1060,26 @@ static const struct acpi_device_id *__acpi_match_device(
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const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
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const struct device *dev)
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{
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struct acpi_device *adev;
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acpi_handle handle = ACPI_HANDLE(dev);
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if (!ids || !handle || acpi_bus_get_device(handle, &adev))
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return NULL;
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if (!acpi_companion_match(dev))
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return NULL;
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return __acpi_match_device(adev, ids);
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return __acpi_match_device(acpi_companion_match(dev), ids, NULL);
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}
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EXPORT_SYMBOL_GPL(acpi_match_device);
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int acpi_match_device_ids(struct acpi_device *device,
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const struct acpi_device_id *ids)
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{
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return __acpi_match_device(device, ids) ? 0 : -ENOENT;
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return __acpi_match_device(device, ids, NULL) ? 0 : -ENOENT;
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}
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EXPORT_SYMBOL(acpi_match_device_ids);
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/* Performs match against special "PRP0001" shoehorn ACPI ID */
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static bool acpi_of_driver_match_device(struct device *dev,
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const struct device_driver *drv)
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{
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const union acpi_object *of_compatible, *obj;
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struct acpi_device *adev;
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int i, nval;
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adev = ACPI_COMPANION(dev);
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if (!adev)
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return false;
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of_compatible = adev->data.of_compatible;
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if (!drv->of_match_table || !of_compatible)
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return false;
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if (of_compatible->type == ACPI_TYPE_PACKAGE) {
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nval = of_compatible->package.count;
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obj = of_compatible->package.elements;
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} else { /* Must be ACPI_TYPE_STRING. */
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nval = 1;
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obj = of_compatible;
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}
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/* Now we can look for the driver DT compatible strings */
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for (i = 0; i < nval; i++, obj++) {
|
||||
const struct of_device_id *id;
|
||||
|
||||
for (id = drv->of_match_table; id->compatible[0]; id++)
|
||||
if (!strcasecmp(obj->string.pointer, id->compatible))
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
bool acpi_driver_match_device(struct device *dev,
|
||||
const struct device_driver *drv)
|
||||
{
|
||||
if (!drv->acpi_match_table)
|
||||
return acpi_of_driver_match_device(dev, drv);
|
||||
return acpi_of_match_device(ACPI_COMPANION(dev),
|
||||
drv->of_match_table);
|
||||
|
||||
return !!acpi_match_device(drv->acpi_match_table, dev);
|
||||
return !!__acpi_match_device(acpi_companion_match(dev),
|
||||
drv->acpi_match_table, drv->of_match_table);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(acpi_driver_match_device);
|
||||
|
||||
@ -1031,20 +1120,7 @@ static int acpi_bus_match(struct device *dev, struct device_driver *drv)
|
||||
|
||||
static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env)
|
||||
{
|
||||
struct acpi_device *acpi_dev = to_acpi_device(dev);
|
||||
int len;
|
||||
|
||||
if (list_empty(&acpi_dev->pnp.ids))
|
||||
return 0;
|
||||
|
||||
if (add_uevent_var(env, "MODALIAS="))
|
||||
return -ENOMEM;
|
||||
len = create_modalias(acpi_dev, &env->buf[env->buflen - 1],
|
||||
sizeof(env->buf) - env->buflen);
|
||||
if (len <= 0)
|
||||
return len;
|
||||
env->buflen += len;
|
||||
return 0;
|
||||
return __acpi_device_uevent_modalias(to_acpi_device(dev), env);
|
||||
}
|
||||
|
||||
static void acpi_device_notify(acpi_handle handle, u32 event, void *data)
|
||||
@ -1062,10 +1138,10 @@ static void acpi_device_notify_fixed(void *data)
|
||||
acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device);
|
||||
}
|
||||
|
||||
static acpi_status acpi_device_fixed_event(void *data)
|
||||
static u32 acpi_device_fixed_event(void *data)
|
||||
{
|
||||
acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_device_notify_fixed, data);
|
||||
return AE_OK;
|
||||
return ACPI_INTERRUPT_HANDLED;
|
||||
}
|
||||
|
||||
static int acpi_device_install_notify_handler(struct acpi_device *device)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user