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Commit 492667da authored by Joerg Roedel's avatar Joerg Roedel
Browse files

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: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 8eed9833

arch/x86/include/asm/amd_iommu_types.h

+0 −3
Original line number Diff line number Diff line
@@ -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;

arch/x86/kernel/amd_iommu.c

+11 −24
Original line number Diff line number Diff line
@@ -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 @@ int __init amd_iommu_init_dma_ops(void) 


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);

}

arch/x86/kernel/amd_iommu_init.c

+0 −18
Original line number Diff line number Diff line
@@ -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 @@ static int __init amd_iommu_init(void) 
	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));