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>

diff --git a/arch/x86/include/asm/amd_iommu_types.h b/arch/x86/include/asm/amd_iommu_types.h
index f92d1b3..ba19ad4 100644 (file)
--- a/arch/x86/include/asm/amd_iommu_types.h
+++ b/arch/x86/include/asm/amd_iommu_types.h
@@ -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;
 

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index b75fcd9..32fb091 100644 (file)
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -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);
 }

diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index fe1686f..7ffc399 100644 (file)
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -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));