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iommu: Remove functions that support private domain 

After moving iommu_group setup to iommu core code [1][2] and removing
private domain support in vt-d [3], there are no users for functions such
as iommu_request_dm_for_dev(), iommu_request_dma_domain_for_dev() and
request_default_domain_for_dev(). So, remove these functions.

[1] commit dce8d6964e ("iommu/amd: Convert to probe/release_device()
    call-backs")
[2] commit e5d1841f18 ("iommu/vt-d: Convert to probe/release_device()
    call-backs")
[3] commit 327d5b2fee ("iommu/vt-d: Allow 32bit devices to uses DMA
    domain")

Signed-off-by: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20200513224721.20504-1-sai.praneeth.prakhya@intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Sai Praneeth Prakhya 2020-05-13 15:47:21 -07:00 committed by Joerg Roedel
parent 8627892af6
commit 69cf449166
2 changed files with 0 additions and 77 deletions
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65
drivers/iommu/iommu.c
View File

@ -2536,71 +2536,6 @@ struct iommu_resv_region *iommu_alloc_resv_region(phys_addr_t start,
}
EXPORT_SYMBOL_GPL(iommu_alloc_resv_region);
static int
request_default_domain_for_dev(struct device *dev, unsigned long type)
{
struct iommu_domain *domain;
struct iommu_group *group;
int ret;
/* Device must already be in a group before calling this function */
group = iommu_group_get(dev);
if (!group)
return -EINVAL;
mutex_lock(&group->mutex);
ret = 0;
if (group->default_domain && group->default_domain->type == type)
goto out;
/* Don't change mappings of existing devices */
ret = -EBUSY;
if (iommu_group_device_count(group) != 1)
goto out;
ret = -ENOMEM;
domain = __iommu_domain_alloc(dev->bus, type);
if (!domain)
goto out;
/* Attach the device to the domain */
ret = __iommu_attach_group(domain, group);
if (ret) {
iommu_domain_free(domain);
goto out;
}
/* Make the domain the default for this group */
if (group->default_domain)
iommu_domain_free(group->default_domain);
group->default_domain = domain;
iommu_create_device_direct_mappings(group, dev);
dev_info(dev, "Using iommu %s mapping\n",
type == IOMMU_DOMAIN_DMA ? "dma" : "direct");
ret = 0;
out:
mutex_unlock(&group->mutex);
iommu_group_put(group);
return ret;
}
/* Request that a device is direct mapped by the IOMMU */
int iommu_request_dm_for_dev(struct device *dev)
{
return request_default_domain_for_dev(dev, IOMMU_DOMAIN_IDENTITY);
}
/* Request that a device can't be direct mapped by the IOMMU */
int iommu_request_dma_domain_for_dev(struct device *dev)
{
return request_default_domain_for_dev(dev, IOMMU_DOMAIN_DMA);
}
void iommu_set_default_passthrough(bool cmd_line)
{
if (cmd_line)

12
include/linux/iommu.h
View File

@ -482,8 +482,6 @@ extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
extern void generic_iommu_put_resv_regions(struct device *dev,
struct list_head *list);
extern int iommu_request_dm_for_dev(struct device *dev);
extern int iommu_request_dma_domain_for_dev(struct device *dev);
extern void iommu_set_default_passthrough(bool cmd_line);
extern void iommu_set_default_translated(bool cmd_line);
extern bool iommu_default_passthrough(void);
@ -804,16 +802,6 @@ static inline int iommu_get_group_resv_regions(struct iommu_group *group,
return -ENODEV;
}
static inline int iommu_request_dm_for_dev(struct device *dev)
{
return -ENODEV;
}
static inline int iommu_request_dma_domain_for_dev(struct device *dev)
{
return -ENODEV;
}
static inline void iommu_set_default_passthrough(bool cmd_line)
{
}