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x86/amd-iommu: Store device alias as dev_data pointer 

This finally allows PCI-Device-IDs to be handled by the
IOMMU driver that have no corresponding struct device
present in the system.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2011-06-09 19:03:15 +02:00
parent 3b03bb745e
commit 71f7758090
2 changed files with 16 additions and 20 deletions
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2
arch/x86/include/asm/amd_iommu_types.h
View File

@ -311,7 +311,7 @@ struct protection_domain {
struct iommu_dev_data {
struct list_head list; /* For domain->dev_list */
struct list_head dev_data_list; /* For global dev_data_list */
struct device *alias; /* The Alias Device */
struct iommu_dev_data *alias_data;/* The alias dev_data */
struct protection_domain *domain; /* Domain the device is bound to */
atomic_t bind; /* Domain attach reverent count */
u16 devid; /* PCI Device ID */

34
arch/x86/kernel/amd_iommu.c
View File

@ -203,7 +203,6 @@ static bool check_device(struct device *dev)
static int iommu_init_device(struct device *dev)
{
struct iommu_dev_data *dev_data;
struct pci_dev *pdev;
u16 alias;
if (dev->archdata.iommu)
@ -215,13 +214,16 @@ static int iommu_init_device(struct device *dev)
alias = amd_iommu_alias_table[dev_data->devid];
if (alias != dev_data->devid) {
pdev = pci_get_bus_and_slot(PCI_BUS(alias), alias & 0xff);
if (pdev)
dev_data->alias = &pdev->dev;
else {
struct iommu_dev_data *alias_data;
alias_data = find_dev_data(alias);
if (alias_data == NULL) {
pr_err("AMD-Vi: Warning: Unhandled device %s\n",
dev_name(dev));
free_dev_data(dev_data);
return -ENOTSUPP;
}
dev_data->alias_data = alias_data;
}
dev->archdata.iommu = dev_data;
@ -1642,14 +1644,8 @@ static int __attach_device(struct iommu_dev_data *dev_data,
/* lock domain */
spin_lock(&domain->lock);
if (dev_data->alias != NULL) {
struct iommu_dev_data *alias_data;
alias_data = get_dev_data(dev_data->alias);
ret = -EINVAL;
if (!alias_data)
goto out_unlock;
if (dev_data->alias_data != NULL) {
struct iommu_dev_data *alias_data = dev_data->alias_data;
/* Some sanity checks */
ret = -EBUSY;
@ -1721,7 +1717,6 @@ static int attach_device(struct device *dev,
*/
static void __detach_device(struct iommu_dev_data *dev_data)
{
struct iommu_dev_data *alias_data;
struct protection_domain *domain;
unsigned long flags;
@ -1731,8 +1726,9 @@ static void __detach_device(struct iommu_dev_data *dev_data)
spin_lock_irqsave(&domain->lock, flags);
if (dev_data->alias) {
alias_data = get_dev_data(dev_data->alias);
if (dev_data->alias_data != NULL) {
struct iommu_dev_data *alias_data = dev_data->alias_data;
if (atomic_dec_and_test(&alias_data->bind))
do_detach(alias_data);
}
@ -1779,7 +1775,7 @@ static void detach_device(struct device *dev)
*/
static struct protection_domain *domain_for_device(struct device *dev)
{
struct iommu_dev_data *dev_data, *alias_data;
struct iommu_dev_data *dev_data;
struct protection_domain *dom = NULL;
unsigned long flags;
@ -1788,8 +1784,8 @@ static struct protection_domain *domain_for_device(struct device *dev)
if (dev_data->domain)
return dev_data->domain;
if (dev_data->alias != NULL) {
alias_data = get_dev_data(dev_data->alias);
if (dev_data->alias_data != NULL) {
struct iommu_dev_data *alias_data = dev_data->alias_data;
read_lock_irqsave(&amd_iommu_devtable_lock, flags);
if (alias_data->domain != NULL) {