linux-4.4.1/iommu_group_add_device()
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開始行:
*参照元 [#heb67385]
#backlinks
*説明 [#j118c1b0]
-パス: [[linux-4.4.1/drivers/iommu/iommu.c]]
-FIXME: これは何？
--説明
**引数 [#da5bbb58]
-struct iommu_group *group
--
--[[linux-4.4.1/iommu_group]]
-struct device *dev
--
--[[linux-4.4.1/device]]
**返り値 [#q1510092]
-int
--
**参考 [#ie433ac1]
struct device の iommu_group を参照する関数
-[[linux-4.4.1/iommu_group_get()]]
*実装 [#o97c3a9d]
/**
* iommu_group_add_device - add a device to an iommu group
* @group: the group into which to add the device (refer...
* @dev: the device
*
* This function is called by an iommu driver to add a d...
* group. Adding a device increments the group referenc...
*/
int iommu_group_add_device(struct iommu_group *group, st...
{
int ret, i = 0;
struct iommu_device *device;
-
--[[linux-4.4.1/iommu_device]]
device = kzalloc(sizeof(*device), GFP_KERNEL);
if (!device)
return -ENOMEM;
-
--[[linux-4.4.1/kzalloc()]]
device->dev = dev;
ret = sysfs_create_link(&dev->kobj, &group->kobj, "iomm...
if (ret) {
kfree(device);
return ret;
}
-
--[[linux-4.4.1/sysfs_create_link()]]
--[[linux-4.4.1/kfree()]]
device->name = kasprintf(GFP_KERNEL, "%s", kobject_name...
-
--[[linux-4.4.1/kasprintf()]]
--[[linux-4.4.1/kobject_name()]]
rename:
if (!device->name) {
sysfs_remove_link(&dev->kobj, "iommu_group");
kfree(device);
return -ENOMEM;
}
-
--[[linux-4.4.1/sysfs_remove_link()]]
--[[linux-4.4.1/kfree()]]
ret = sysfs_create_link_nowarn(group->devices_kobj,
&dev->kobj, device->name);
if (ret) {
kfree(device->name);
if (ret == -EEXIST && i >= 0) {
/*
* Account for the slim chance of collision
* and append an instance to the name.
*/
device->name = kasprintf(GFP_KERNEL, "%s.%d",
kobject_name(&dev->kobj), i++);
goto rename;
}
sysfs_remove_link(&dev->kobj, "iommu_group");
kfree(device);
return ret;
}
-
--[[linux-4.4.1/kasprintf()]]
--[[linux-4.4.1/sysfs_remove_link()]]
kobject_get(group->devices_kobj);
-
--[[linux-4.4.1/kobject_get()]]
dev->iommu_group = group;
iommu_group_create_direct_mappings(group, dev);
-
--[[linux-4.4.1/iommu_group_create_direct_mappings()]]
mutex_lock(&group->mutex);
list_add_tail(&device->list, &group->devices);
if (group->domain)
__iommu_attach_device(group->domain, dev);
mutex_unlock(&group->mutex);
-
--[[linux-4.4.1/mutex_lock()]]
--[[linux-4.4.1/list_add_tail()]]
--[[linux-4.4.1/__iommu_attach_device()]]
--[[linux-4.4.1/mutex_unlock()]]
/* Notify any listeners about change to group. */
blocking_notifier_call_chain(&group->notifier,
IOMMU_GROUP_NOTIFY_ADD_DEVICE, dev);
-
--[[linux-4.4.1/blocking_notifier_call_chain()]]
trace_add_device_to_group(group->id, dev);
-
--[[linux-4.4.1/trace_add_device_to_group()]]
pr_info("Adding device %s to group %d\n", dev_name(dev)...
-
--[[linux-4.4.1/pr_info()]]
--[[linux-4.4.1/dev_name()]]
return 0;
}
EXPORT_SYMBOL_GPL(iommu_group_add_device);
-
--[[linux-4.4.1/EXPORT_SYMBOL_GPL()]]
*コメント [#ldc445ce]
終了行:
*参照元 [#heb67385]
#backlinks
*説明 [#j118c1b0]
-パス: [[linux-4.4.1/drivers/iommu/iommu.c]]
-FIXME: これは何？
--説明
**引数 [#da5bbb58]
-struct iommu_group *group
--
--[[linux-4.4.1/iommu_group]]
-struct device *dev
--
--[[linux-4.4.1/device]]
**返り値 [#q1510092]
-int
--
**参考 [#ie433ac1]
struct device の iommu_group を参照する関数
-[[linux-4.4.1/iommu_group_get()]]
*実装 [#o97c3a9d]
/**
* iommu_group_add_device - add a device to an iommu group
* @group: the group into which to add the device (refer...
* @dev: the device
*
* This function is called by an iommu driver to add a d...
* group. Adding a device increments the group referenc...
*/
int iommu_group_add_device(struct iommu_group *group, st...
{
int ret, i = 0;
struct iommu_device *device;
-
--[[linux-4.4.1/iommu_device]]
device = kzalloc(sizeof(*device), GFP_KERNEL);
if (!device)
return -ENOMEM;
-
--[[linux-4.4.1/kzalloc()]]
device->dev = dev;
ret = sysfs_create_link(&dev->kobj, &group->kobj, "iomm...
if (ret) {
kfree(device);
return ret;
}
-
--[[linux-4.4.1/sysfs_create_link()]]
--[[linux-4.4.1/kfree()]]
device->name = kasprintf(GFP_KERNEL, "%s", kobject_name...
-
--[[linux-4.4.1/kasprintf()]]
--[[linux-4.4.1/kobject_name()]]
rename:
if (!device->name) {
sysfs_remove_link(&dev->kobj, "iommu_group");
kfree(device);
return -ENOMEM;
}
-
--[[linux-4.4.1/sysfs_remove_link()]]
--[[linux-4.4.1/kfree()]]
ret = sysfs_create_link_nowarn(group->devices_kobj,
&dev->kobj, device->name);
if (ret) {
kfree(device->name);
if (ret == -EEXIST && i >= 0) {
/*
* Account for the slim chance of collision
* and append an instance to the name.
*/
device->name = kasprintf(GFP_KERNEL, "%s.%d",
kobject_name(&dev->kobj), i++);
goto rename;
}
sysfs_remove_link(&dev->kobj, "iommu_group");
kfree(device);
return ret;
}
-
--[[linux-4.4.1/kasprintf()]]
--[[linux-4.4.1/sysfs_remove_link()]]
kobject_get(group->devices_kobj);
-
--[[linux-4.4.1/kobject_get()]]
dev->iommu_group = group;
iommu_group_create_direct_mappings(group, dev);
-
--[[linux-4.4.1/iommu_group_create_direct_mappings()]]
mutex_lock(&group->mutex);
list_add_tail(&device->list, &group->devices);
if (group->domain)
__iommu_attach_device(group->domain, dev);
mutex_unlock(&group->mutex);
-
--[[linux-4.4.1/mutex_lock()]]
--[[linux-4.4.1/list_add_tail()]]
--[[linux-4.4.1/__iommu_attach_device()]]
--[[linux-4.4.1/mutex_unlock()]]
/* Notify any listeners about change to group. */
blocking_notifier_call_chain(&group->notifier,
IOMMU_GROUP_NOTIFY_ADD_DEVICE, dev);
-
--[[linux-4.4.1/blocking_notifier_call_chain()]]
trace_add_device_to_group(group->id, dev);
-
--[[linux-4.4.1/trace_add_device_to_group()]]
pr_info("Adding device %s to group %d\n", dev_name(dev)...
-
--[[linux-4.4.1/pr_info()]]
--[[linux-4.4.1/dev_name()]]
return 0;
}
EXPORT_SYMBOL_GPL(iommu_group_add_device);
-
--[[linux-4.4.1/EXPORT_SYMBOL_GPL()]]
*コメント [#ldc445ce]
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