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iommu/amd: Remove old alias handling code 

This mostly removes the code to create dev_data structures
for alias device ids. They are not necessary anymore, as
they were only created for device ids which have no struct
pci_dev associated with it.  But these device ids are
handled in a simpler way now, so there is no need for this
code anymore.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2015-10-20 17:33:39 +02:00
parent e25bfb56ea
commit 61289cbaf6
1 changed files with 0 additions and 99 deletions
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99
drivers/iommu/amd_iommu.c
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@ -89,8 +89,6 @@ static struct dma_map_ops amd_iommu_dma_ops;
struct iommu_dev_data {
struct list_head list; /* For domain->dev_list */
struct list_head dev_data_list; /* For global dev_data_list */
struct list_head alias_list; /* Link alias-groups together */
struct iommu_dev_data *alias_data;/* The alias dev_data */
struct protection_domain *domain; /* Domain the device is bound to */
u16 devid; /* PCI Device ID */
bool iommu_v2; /* Device can make use of IOMMUv2 */
@ -136,8 +134,6 @@ static struct iommu_dev_data *alloc_dev_data(u16 devid)
if (!dev_data)
return NULL;
INIT_LIST_HEAD(&dev_data->alias_list);
dev_data->devid = devid;
spin_lock_irqsave(&dev_data_list_lock, flags);
@ -147,17 +143,6 @@ static struct iommu_dev_data *alloc_dev_data(u16 devid)
return dev_data;
}
static void free_dev_data(struct iommu_dev_data *dev_data)
{
unsigned long flags;
spin_lock_irqsave(&dev_data_list_lock, flags);
list_del(&dev_data->dev_data_list);
spin_unlock_irqrestore(&dev_data_list_lock, flags);
kfree(dev_data);
}
static struct iommu_dev_data *search_dev_data(u16 devid)
{
struct iommu_dev_data *dev_data;
@ -311,73 +296,10 @@ out:
iommu_group_put(group);
}
static int __last_alias(struct pci_dev *pdev, u16 alias, void *data)
{
*(u16 *)data = alias;
return 0;
}
static u16 get_alias(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
u16 devid, ivrs_alias, pci_alias;
devid = get_device_id(dev);
ivrs_alias = amd_iommu_alias_table[devid];
pci_for_each_dma_alias(pdev, __last_alias, &pci_alias);
if (ivrs_alias == pci_alias)
return ivrs_alias;
/*
* DMA alias showdown
*
* The IVRS is fairly reliable in telling us about aliases, but it
* can't know about every screwy device. If we don't have an IVRS
* reported alias, use the PCI reported alias. In that case we may
* still need to initialize the rlookup and dev_table entries if the
* alias is to a non-existent device.
*/
if (ivrs_alias == devid) {
if (!amd_iommu_rlookup_table[pci_alias]) {
amd_iommu_rlookup_table[pci_alias] =
amd_iommu_rlookup_table[devid];
memcpy(amd_iommu_dev_table[pci_alias].data,
amd_iommu_dev_table[devid].data,
sizeof(amd_iommu_dev_table[pci_alias].data));
}
return pci_alias;
}
pr_info("AMD-Vi: Using IVRS reported alias %02x:%02x.%d "
"for device %s[%04x:%04x], kernel reported alias "
"%02x:%02x.%d\n", PCI_BUS_NUM(ivrs_alias), PCI_SLOT(ivrs_alias),
PCI_FUNC(ivrs_alias), dev_name(dev), pdev->vendor, pdev->device,
PCI_BUS_NUM(pci_alias), PCI_SLOT(pci_alias),
PCI_FUNC(pci_alias));
/*
* If we don't have a PCI DMA alias and the IVRS alias is on the same
* bus, then the IVRS table may know about a quirk that we don't.
*/
if (pci_alias == devid &&
PCI_BUS_NUM(ivrs_alias) == pdev->bus->number) {
pdev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVFN;
pdev->dma_alias_devfn = ivrs_alias & 0xff;
pr_info("AMD-Vi: Added PCI DMA alias %02x.%d for %s\n",
PCI_SLOT(ivrs_alias), PCI_FUNC(ivrs_alias),
dev_name(dev));
}
return ivrs_alias;
}
static int iommu_init_device(struct device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct iommu_dev_data *dev_data;
u16 alias;
if (dev->archdata.iommu)
return 0;
@ -386,24 +308,6 @@ static int iommu_init_device(struct device *dev)
if (!dev_data)
return -ENOMEM;
alias = get_alias(dev);
if (alias != dev_data->devid) {
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;
/* Add device to the alias_list */
list_add(&dev_data->alias_list, &alias_data->alias_list);
}
if (pci_iommuv2_capable(pdev)) {
struct amd_iommu *iommu;
@ -445,9 +349,6 @@ static void iommu_uninit_device(struct device *dev)
iommu_group_remove_device(dev);
/* Unlink from alias, it may change if another device is re-plugged */
dev_data->alias_data = NULL;
/* Remove dma-ops */
dev->archdata.dma_ops = NULL;