mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-03 17:14:14 +08:00
iommu: Remove add_device()/remove_device() code-paths
All drivers are converted to use the probe/release_device() call-backs, so the add_device/remove_device() pointers are unused and the code using them can be removed. Signed-off-by: Joerg Roedel <jroedel@suse.de> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Link: https://lore.kernel.org/r/20200429133712.31431-33-joro@8bytes.org Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel
parent
3c51c05479
commit
3eeeb45c6d
@ -220,12 +220,20 @@ out_release:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __iommu_probe_device_helper(struct device *dev)
|
||||
int iommu_probe_device(struct device *dev)
|
||||
{
|
||||
const struct iommu_ops *ops = dev->bus->iommu_ops;
|
||||
struct iommu_group *group;
|
||||
int ret;
|
||||
|
||||
if (!dev_iommu_get(dev))
|
||||
return -ENOMEM;
|
||||
|
||||
if (!try_module_get(ops->owner)) {
|
||||
ret = -EINVAL;
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
ret = __iommu_probe_device(dev, NULL);
|
||||
if (ret)
|
||||
goto err_out;
|
||||
@ -259,64 +267,12 @@ static int __iommu_probe_device_helper(struct device *dev)
|
||||
|
||||
err_release:
|
||||
iommu_release_device(dev);
|
||||
|
||||
err_out:
|
||||
return ret;
|
||||
|
||||
}
|
||||
|
||||
int iommu_probe_device(struct device *dev)
|
||||
{
|
||||
const struct iommu_ops *ops = dev->bus->iommu_ops;
|
||||
struct iommu_group *group;
|
||||
int ret;
|
||||
|
||||
WARN_ON(dev->iommu_group);
|
||||
|
||||
if (!ops)
|
||||
return -EINVAL;
|
||||
|
||||
if (!dev_iommu_get(dev))
|
||||
return -ENOMEM;
|
||||
|
||||
if (!try_module_get(ops->owner)) {
|
||||
ret = -EINVAL;
|
||||
goto err_free_dev_param;
|
||||
}
|
||||
|
||||
if (ops->probe_device)
|
||||
return __iommu_probe_device_helper(dev);
|
||||
|
||||
ret = ops->add_device(dev);
|
||||
if (ret)
|
||||
goto err_module_put;
|
||||
|
||||
group = iommu_group_get(dev);
|
||||
iommu_create_device_direct_mappings(group, dev);
|
||||
iommu_group_put(group);
|
||||
|
||||
if (ops->probe_finalize)
|
||||
ops->probe_finalize(dev);
|
||||
|
||||
return 0;
|
||||
|
||||
err_module_put:
|
||||
module_put(ops->owner);
|
||||
err_free_dev_param:
|
||||
dev_iommu_free(dev);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __iommu_release_device(struct device *dev)
|
||||
{
|
||||
const struct iommu_ops *ops = dev->bus->iommu_ops;
|
||||
|
||||
iommu_device_unlink(dev->iommu->iommu_dev, dev);
|
||||
|
||||
iommu_group_remove_device(dev);
|
||||
|
||||
ops->release_device(dev);
|
||||
}
|
||||
|
||||
void iommu_release_device(struct device *dev)
|
||||
{
|
||||
const struct iommu_ops *ops = dev->bus->iommu_ops;
|
||||
@ -324,10 +280,10 @@ void iommu_release_device(struct device *dev)
|
||||
if (!dev->iommu)
|
||||
return;
|
||||
|
||||
if (ops->release_device)
|
||||
__iommu_release_device(dev);
|
||||
else if (dev->iommu_group)
|
||||
ops->remove_device(dev);
|
||||
iommu_device_unlink(dev->iommu->iommu_dev, dev);
|
||||
iommu_group_remove_device(dev);
|
||||
|
||||
ops->release_device(dev);
|
||||
|
||||
module_put(ops->owner);
|
||||
dev_iommu_free(dev);
|
||||
@ -1560,23 +1516,6 @@ struct iommu_group *iommu_group_get_for_dev(struct device *dev)
|
||||
if (ret)
|
||||
goto out_put_group;
|
||||
|
||||
/*
|
||||
* Try to allocate a default domain - needs support from the
|
||||
* IOMMU driver. There are still some drivers which don't support
|
||||
* default domains, so the return value is not yet checked. Only
|
||||
* allocate the domain here when the driver still has the
|
||||
* add_device/remove_device call-backs implemented.
|
||||
*/
|
||||
if (!ops->probe_device) {
|
||||
iommu_alloc_default_domain(dev);
|
||||
|
||||
if (group->default_domain)
|
||||
ret = __iommu_attach_device(group->default_domain, dev);
|
||||
|
||||
if (ret)
|
||||
goto out_put_group;
|
||||
}
|
||||
|
||||
return group;
|
||||
|
||||
out_put_group:
|
||||
@ -1591,21 +1530,6 @@ struct iommu_domain *iommu_group_default_domain(struct iommu_group *group)
|
||||
return group->default_domain;
|
||||
}
|
||||
|
||||
static int add_iommu_group(struct device *dev, void *data)
|
||||
{
|
||||
int ret = iommu_probe_device(dev);
|
||||
|
||||
/*
|
||||
* We ignore -ENODEV errors for now, as they just mean that the
|
||||
* device is not translated by an IOMMU. We still care about
|
||||
* other errors and fail to initialize when they happen.
|
||||
*/
|
||||
if (ret == -ENODEV)
|
||||
ret = 0;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int probe_iommu_group(struct device *dev, void *data)
|
||||
{
|
||||
const struct iommu_ops *ops = dev->bus->iommu_ops;
|
||||
@ -1793,47 +1717,41 @@ static int iommu_group_create_direct_mappings(struct iommu_group *group)
|
||||
|
||||
int bus_iommu_probe(struct bus_type *bus)
|
||||
{
|
||||
const struct iommu_ops *ops = bus->iommu_ops;
|
||||
struct iommu_group *group, *next;
|
||||
LIST_HEAD(group_list);
|
||||
int ret;
|
||||
|
||||
if (ops->probe_device) {
|
||||
struct iommu_group *group, *next;
|
||||
LIST_HEAD(group_list);
|
||||
/*
|
||||
* This code-path does not allocate the default domain when
|
||||
* creating the iommu group, so do it after the groups are
|
||||
* created.
|
||||
*/
|
||||
ret = bus_for_each_dev(bus, NULL, &group_list, probe_iommu_group);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
/*
|
||||
* This code-path does not allocate the default domain when
|
||||
* creating the iommu group, so do it after the groups are
|
||||
* created.
|
||||
*/
|
||||
ret = bus_for_each_dev(bus, NULL, &group_list, probe_iommu_group);
|
||||
if (ret)
|
||||
return ret;
|
||||
list_for_each_entry_safe(group, next, &group_list, entry) {
|
||||
/* Remove item from the list */
|
||||
list_del_init(&group->entry);
|
||||
|
||||
list_for_each_entry_safe(group, next, &group_list, entry) {
|
||||
/* Remove item from the list */
|
||||
list_del_init(&group->entry);
|
||||
mutex_lock(&group->mutex);
|
||||
|
||||
mutex_lock(&group->mutex);
|
||||
|
||||
/* Try to allocate default domain */
|
||||
probe_alloc_default_domain(bus, group);
|
||||
|
||||
if (!group->default_domain) {
|
||||
mutex_unlock(&group->mutex);
|
||||
continue;
|
||||
}
|
||||
|
||||
iommu_group_create_direct_mappings(group);
|
||||
|
||||
ret = __iommu_group_dma_attach(group);
|
||||
/* Try to allocate default domain */
|
||||
probe_alloc_default_domain(bus, group);
|
||||
|
||||
if (!group->default_domain) {
|
||||
mutex_unlock(&group->mutex);
|
||||
|
||||
if (ret)
|
||||
break;
|
||||
continue;
|
||||
}
|
||||
} else {
|
||||
ret = bus_for_each_dev(bus, NULL, NULL, add_iommu_group);
|
||||
|
||||
iommu_group_create_direct_mappings(group);
|
||||
|
||||
ret = __iommu_group_dma_attach(group);
|
||||
|
||||
mutex_unlock(&group->mutex);
|
||||
|
||||
if (ret)
|
||||
break;
|
||||
}
|
||||
|
||||
return ret;
|
||||
|
||||
@ -223,8 +223,6 @@ struct iommu_iotlb_gather {
|
||||
* @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush
|
||||
* queue
|
||||
* @iova_to_phys: translate iova to physical address
|
||||
* @add_device: add device to iommu grouping
|
||||
* @remove_device: remove device from iommu grouping
|
||||
* @probe_device: Add device to iommu driver handling
|
||||
* @release_device: Remove device from iommu driver handling
|
||||
* @probe_finalize: Do final setup work after the device is added to an IOMMU
|
||||
@ -277,8 +275,6 @@ struct iommu_ops {
|
||||
void (*iotlb_sync)(struct iommu_domain *domain,
|
||||
struct iommu_iotlb_gather *iotlb_gather);
|
||||
phys_addr_t (*iova_to_phys)(struct iommu_domain *domain, dma_addr_t iova);
|
||||
int (*add_device)(struct device *dev);
|
||||
void (*remove_device)(struct device *dev);
|
||||
struct iommu_device *(*probe_device)(struct device *dev);
|
||||
void (*release_device)(struct device *dev);
|
||||
void (*probe_finalize)(struct device *dev);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user