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Diffstat (limited to 'arch/x86/kernel/amd_iommu_init.c')
-rw-r--r--arch/x86/kernel/amd_iommu_init.c94
1 files changed, 37 insertions, 57 deletions
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index c20001e4f55..7ffc3996523 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
+ * Copyright (C) 2007-2009 Advanced Micro Devices, Inc.
* Author: Joerg Roedel <joerg.roedel@amd.com>
* Leo Duran <leo.duran@amd.com>
*
@@ -25,10 +25,12 @@
#include <linux/interrupt.h>
#include <linux/msi.h>
#include <asm/pci-direct.h>
+#include <asm/amd_iommu_proto.h>
#include <asm/amd_iommu_types.h>
#include <asm/amd_iommu.h>
#include <asm/iommu.h>
#include <asm/gart.h>
+#include <asm/x86_init.h>
/*
* definitions for the ACPI scanning code
@@ -123,18 +125,24 @@ u16 amd_iommu_last_bdf; /* largest PCI device id we have
to handle */
LIST_HEAD(amd_iommu_unity_map); /* a list of required unity mappings
we find in ACPI */
-#ifdef CONFIG_IOMMU_STRESS
-bool amd_iommu_isolate = false;
-#else
-bool amd_iommu_isolate = true; /* if true, device isolation is
- enabled */
-#endif
-
bool amd_iommu_unmap_flush; /* if true, flush on every unmap */
LIST_HEAD(amd_iommu_list); /* list of all AMD IOMMUs in the
system */
+/* Array to assign indices to IOMMUs*/
+struct amd_iommu *amd_iommus[MAX_IOMMUS];
+int amd_iommus_present;
+
+/* IOMMUs have a non-present cache? */
+bool amd_iommu_np_cache __read_mostly;
+
+/*
+ * List of protection domains - used during resume
+ */
+LIST_HEAD(amd_iommu_pd_list);
+spinlock_t amd_iommu_pd_lock;
+
/*
* Pointer to the device table which is shared by all AMD IOMMUs
* it is indexed by the PCI device id or the HT unit id and contains
@@ -157,12 +165,6 @@ 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.
*/
@@ -838,7 +840,18 @@ static void __init free_iommu_all(void)
static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)
{
spin_lock_init(&iommu->lock);
+
+ /* Add IOMMU to internal data structures */
list_add_tail(&iommu->list, &amd_iommu_list);
+ iommu->index = amd_iommus_present++;
+
+ if (unlikely(iommu->index >= MAX_IOMMUS)) {
+ WARN(1, "AMD-Vi: System has more IOMMUs than supported by this driver\n");
+ return -ENOSYS;
+ }
+
+ /* Index is fine - add IOMMU to the array */
+ amd_iommus[iommu->index] = iommu;
/*
* Copy data from ACPI table entry to the iommu struct
@@ -868,6 +881,9 @@ static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)
init_iommu_from_acpi(iommu, h);
init_iommu_devices(iommu);
+ if (iommu->cap & (1UL << IOMMU_CAP_NPCACHE))
+ amd_iommu_np_cache = true;
+
return pci_enable_device(iommu->dev);
}
@@ -925,7 +941,7 @@ static int __init init_iommu_all(struct acpi_table_header *table)
*
****************************************************************************/
-static int __init iommu_setup_msi(struct amd_iommu *iommu)
+static int iommu_setup_msi(struct amd_iommu *iommu)
{
int r;
@@ -1176,19 +1192,10 @@ static struct sys_device device_amd_iommu = {
* functions. Finally it prints some information about AMD IOMMUs and
* the driver state and enables the hardware.
*/
-int __init amd_iommu_init(void)
+static int __init amd_iommu_init(void)
{
int i, ret = 0;
-
- if (no_iommu) {
- printk(KERN_INFO "AMD-Vi disabled by kernel command line\n");
- return 0;
- }
-
- if (!amd_iommu_detected)
- return -ENODEV;
-
/*
* First parse ACPI tables to find the largest Bus/Dev/Func
* we need to handle. Upon this information the shared data
@@ -1225,15 +1232,6 @@ 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));
@@ -1255,6 +1253,8 @@ int __init amd_iommu_init(void)
*/
amd_iommu_pd_alloc_bitmap[0] = 1;
+ spin_lock_init(&amd_iommu_pd_lock);
+
/*
* now the data structures are allocated and basically initialized
* start the real acpi table scan
@@ -1286,17 +1286,12 @@ int __init amd_iommu_init(void)
if (iommu_pass_through)
goto out;
- printk(KERN_INFO "AMD-Vi: device isolation ");
- if (amd_iommu_isolate)
- printk("enabled\n");
- else
- printk("disabled\n");
-
if (amd_iommu_unmap_flush)
printk(KERN_INFO "AMD-Vi: IO/TLB flush on unmap enabled\n");
else
printk(KERN_INFO "AMD-Vi: Lazy IO/TLB flushing enabled\n");
+ x86_platform.iommu_shutdown = disable_iommus;
out:
return ret;
@@ -1304,9 +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));
@@ -1323,11 +1315,6 @@ free:
goto out;
}
-void amd_iommu_shutdown(void)
-{
- disable_iommus();
-}
-
/****************************************************************************
*
* Early detect code. This code runs at IOMMU detection time in the DMA
@@ -1342,16 +1329,13 @@ static int __init early_amd_iommu_detect(struct acpi_table_header *table)
void __init amd_iommu_detect(void)
{
- if (swiotlb || no_iommu || (iommu_detected && !gart_iommu_aperture))
+ if (no_iommu || (iommu_detected && !gart_iommu_aperture))
return;
if (acpi_table_parse("IVRS", early_amd_iommu_detect) == 0) {
iommu_detected = 1;
amd_iommu_detected = 1;
-#ifdef CONFIG_GART_IOMMU
- gart_iommu_aperture_disabled = 1;
- gart_iommu_aperture = 0;
-#endif
+ x86_init.iommu.iommu_init = amd_iommu_init;
}
}
@@ -1372,10 +1356,6 @@ static int __init parse_amd_iommu_dump(char *str)
static int __init parse_amd_iommu_options(char *str)
{
for (; *str; ++str) {
- if (strncmp(str, "isolate", 7) == 0)
- amd_iommu_isolate = true;
- if (strncmp(str, "share", 5) == 0)
- amd_iommu_isolate = false;
if (strncmp(str, "fullflush", 9) == 0)
amd_iommu_unmap_flush = true;
}
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-11-04 16:08:27 +0000