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x86/amd-iommu: Remove amd_iommu_pd_table 

The data that was stored in this table is now available in
dev->archdata.iommu. So this table is not longer necessary.
This patch removes the remaining uses of that variable and
removes it from the code.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
hifive-unleashed-5.1
Joerg Roedel 2009-11-27 13:25:47 +01:00
parent 8eed983334
commit 492667dacc
3 changed files with 11 additions and 45 deletions
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3
arch/x86/include/asm/amd_iommu_types.h
View File

@ -457,9 +457,6 @@ extern unsigned amd_iommu_aperture_order;
/* largest PCI device id we expect translation requests for */
extern u16 amd_iommu_last_bdf;
/* data structures for protection domain handling */
extern struct protection_domain **amd_iommu_pd_table;
/* allocation bitmap for domain ids */
extern unsigned long *amd_iommu_pd_alloc_bitmap;

35
arch/x86/kernel/amd_iommu.c
View File

@ -1309,8 +1309,6 @@ static void set_dte_entry(u16 devid, struct protection_domain *domain)
{
u64 pte_root = virt_to_phys(domain->pt_root);
BUG_ON(amd_iommu_pd_table[devid] != NULL);
pte_root |= (domain->mode & DEV_ENTRY_MODE_MASK)
<< DEV_ENTRY_MODE_SHIFT;
pte_root |= IOMMU_PTE_IR | IOMMU_PTE_IW | IOMMU_PTE_P | IOMMU_PTE_TV;
@ -1318,20 +1316,10 @@ static void set_dte_entry(u16 devid, struct protection_domain *domain)
amd_iommu_dev_table[devid].data[2] = domain->id;
amd_iommu_dev_table[devid].data[1] = upper_32_bits(pte_root);
amd_iommu_dev_table[devid].data[0] = lower_32_bits(pte_root);
amd_iommu_pd_table[devid] = domain;
}
static void clear_dte_entry(u16 devid)
{
struct protection_domain *domain = amd_iommu_pd_table[devid];
BUG_ON(domain == NULL);
/* remove domain from the lookup table */
amd_iommu_pd_table[devid] = NULL;
/* remove entry from the device table seen by the hardware */
amd_iommu_dev_table[devid].data[0] = IOMMU_PTE_P | IOMMU_PTE_TV;
amd_iommu_dev_table[devid].data[1] = 0;
@ -1641,15 +1629,11 @@ static struct protection_domain *get_domain(struct device *dev)
static void update_device_table(struct protection_domain *domain)
{
unsigned long flags;
int i;
struct iommu_dev_data *dev_data;
for (i = 0; i <= amd_iommu_last_bdf; ++i) {
if (amd_iommu_pd_table[i] != domain)
continue;
write_lock_irqsave(&amd_iommu_devtable_lock, flags);
set_dte_entry(i, domain);
write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
list_for_each_entry(dev_data, &domain->dev_list, list) {
u16 devid = get_device_id(dev_data->dev);
set_dte_entry(devid, domain);
}
}
@ -2259,14 +2243,17 @@ free_domains:
static void cleanup_domain(struct protection_domain *domain)
{
struct iommu_dev_data *dev_data, *next;
unsigned long flags;
u16 devid;
write_lock_irqsave(&amd_iommu_devtable_lock, flags);
for (devid = 0; devid <= amd_iommu_last_bdf; ++devid)
if (amd_iommu_pd_table[devid] == domain)
clear_dte_entry(devid);
list_for_each_entry_safe(dev_data, next, &domain->dev_list, list) {
struct device *dev = dev_data->dev;
do_detach(dev);
atomic_set(&dev_data->bind, 0);
}
write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
}

18
arch/x86/kernel/amd_iommu_init.c
View File

@ -164,12 +164,6 @@ u16 *amd_iommu_alias_table;
*/
struct amd_iommu **amd_iommu_rlookup_table;
/*
* The pd table (protection domain table) is used to find the protection domain
* data structure a device belongs to. Indexed with the PCI device id too.
*/
struct protection_domain **amd_iommu_pd_table;
/*
* AMD IOMMU allows up to 2^16 differend protection domains. This is a bitmap
* to know which ones are already in use.
@ -1238,15 +1232,6 @@ static int __init amd_iommu_init(void)
if (amd_iommu_rlookup_table == NULL)
goto free;
/*
* Protection Domain table - maps devices to protection domains
* This table has the same size as the rlookup_table
*/
amd_iommu_pd_table = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
get_order(rlookup_table_size));
if (amd_iommu_pd_table == NULL)
goto free;
amd_iommu_pd_alloc_bitmap = (void *)__get_free_pages(
GFP_KERNEL | __GFP_ZERO,
get_order(MAX_DOMAIN_ID/8));
@ -1314,9 +1299,6 @@ free:
free_pages((unsigned long)amd_iommu_pd_alloc_bitmap,
get_order(MAX_DOMAIN_ID/8));
free_pages((unsigned long)amd_iommu_pd_table,
get_order(rlookup_table_size));
free_pages((unsigned long)amd_iommu_rlookup_table,
get_order(rlookup_table_size));