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path: root/drivers/iommu/amd/init.c
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Diffstat (limited to 'drivers/iommu/amd/init.c')
-rw-r--r--drivers/iommu/amd/init.c69
1 files changed, 42 insertions, 27 deletions
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index 779505610164..50be138108e7 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -552,6 +552,7 @@ static int __init find_last_devid_from_ivhd(struct ivhd_header *h)
{
u8 *p = (void *)h, *end = (void *)h;
struct ivhd_entry *dev;
+ int last_devid = -EINVAL;
u32 ivhd_size = get_ivhd_header_size(h);
@@ -569,13 +570,15 @@ static int __init find_last_devid_from_ivhd(struct ivhd_header *h)
case IVHD_DEV_ALL:
/* Use maximum BDF value for DEV_ALL */
update_last_devid(0xffff);
- break;
+ return 0xffff;
case IVHD_DEV_SELECT:
case IVHD_DEV_RANGE_END:
case IVHD_DEV_ALIAS:
case IVHD_DEV_EXT_SELECT:
/* all the above subfield types refer to device ids */
update_last_devid(dev->devid);
+ if (dev->devid > last_devid)
+ last_devid = dev->devid;
break;
default:
break;
@@ -585,7 +588,7 @@ static int __init find_last_devid_from_ivhd(struct ivhd_header *h)
WARN_ON(p != end);
- return 0;
+ return last_devid;
}
static int __init check_ivrs_checksum(struct acpi_table_header *table)
@@ -609,27 +612,31 @@ static int __init check_ivrs_checksum(struct acpi_table_header *table)
* id which we need to handle. This is the first of three functions which parse
* the ACPI table. So we check the checksum here.
*/
-static int __init find_last_devid_acpi(struct acpi_table_header *table)
+static int __init find_last_devid_acpi(struct acpi_table_header *table, u16 pci_seg)
{
u8 *p = (u8 *)table, *end = (u8 *)table;
struct ivhd_header *h;
+ int last_devid, last_bdf = 0;
p += IVRS_HEADER_LENGTH;
end += table->length;
while (p < end) {
h = (struct ivhd_header *)p;
- if (h->type == amd_iommu_target_ivhd_type) {
- int ret = find_last_devid_from_ivhd(h);
-
- if (ret)
- return ret;
+ if (h->pci_seg == pci_seg &&
+ h->type == amd_iommu_target_ivhd_type) {
+ last_devid = find_last_devid_from_ivhd(h);
+
+ if (last_devid < 0)
+ return -EINVAL;
+ if (last_devid > last_bdf)
+ last_bdf = last_devid;
}
p += h->length;
}
WARN_ON(p != end);
- return 0;
+ return last_bdf;
}
/****************************************************************************
@@ -1553,14 +1560,28 @@ static int __init init_iommu_from_acpi(struct amd_iommu *iommu,
}
/* Allocate PCI segment data structure */
-static struct amd_iommu_pci_seg *__init alloc_pci_segment(u16 id)
+static struct amd_iommu_pci_seg *__init alloc_pci_segment(u16 id,
+ struct acpi_table_header *ivrs_base)
{
struct amd_iommu_pci_seg *pci_seg;
+ int last_bdf;
+
+ /*
+ * First parse ACPI tables to find the largest Bus/Dev/Func we need to
+ * handle in this PCI segment. Upon this information the shared data
+ * structures for the PCI segments in the system will be allocated.
+ */
+ last_bdf = find_last_devid_acpi(ivrs_base, id);
+ if (last_bdf < 0)
+ return NULL;
pci_seg = kzalloc(sizeof(struct amd_iommu_pci_seg), GFP_KERNEL);
if (pci_seg == NULL)
return NULL;
+ pci_seg->last_bdf = last_bdf;
+ DUMP_printk("PCI segment : 0x%0x, last bdf : 0x%04x\n", id, last_bdf);
+
pci_seg->id = id;
init_llist_head(&pci_seg->dev_data_list);
INIT_LIST_HEAD(&pci_seg->unity_map);
@@ -1576,7 +1597,8 @@ static struct amd_iommu_pci_seg *__init alloc_pci_segment(u16 id)
return pci_seg;
}
-static struct amd_iommu_pci_seg *__init get_pci_segment(u16 id)
+static struct amd_iommu_pci_seg *__init get_pci_segment(u16 id,
+ struct acpi_table_header *ivrs_base)
{
struct amd_iommu_pci_seg *pci_seg;
@@ -1585,7 +1607,7 @@ static struct amd_iommu_pci_seg *__init get_pci_segment(u16 id)
return pci_seg;
}
- return alloc_pci_segment(id);
+ return alloc_pci_segment(id, ivrs_base);
}
static void __init free_pci_segments(void)
@@ -1686,12 +1708,13 @@ static void amd_iommu_ats_write_check_workaround(struct amd_iommu *iommu)
* together and also allocates the command buffer and programs the
* hardware. It does NOT enable the IOMMU. This is done afterwards.
*/
-static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)
+static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h,
+ struct acpi_table_header *ivrs_base)
{
struct amd_iommu_pci_seg *pci_seg;
int ret;
- pci_seg = get_pci_segment(h->pci_seg);
+ pci_seg = get_pci_segment(h->pci_seg, ivrs_base);
if (pci_seg == NULL)
return -ENOMEM;
iommu->pci_seg = pci_seg;
@@ -1866,7 +1889,7 @@ static int __init init_iommu_all(struct acpi_table_header *table)
if (iommu == NULL)
return -ENOMEM;
- ret = init_iommu_one(iommu, h);
+ ret = init_iommu_one(iommu, h, table);
if (ret)
return ret;
}
@@ -2412,13 +2435,14 @@ static void __init free_unity_maps(void)
}
/* called for unity map ACPI definition */
-static int __init init_unity_map_range(struct ivmd_header *m)
+static int __init init_unity_map_range(struct ivmd_header *m,
+ struct acpi_table_header *ivrs_base)
{
struct unity_map_entry *e = NULL;
struct amd_iommu_pci_seg *pci_seg;
char *s;
- pci_seg = get_pci_segment(m->pci_seg);
+ pci_seg = get_pci_segment(m->pci_seg, ivrs_base);
if (pci_seg == NULL)
return -ENOMEM;
@@ -2485,7 +2509,7 @@ static int __init init_memory_definitions(struct acpi_table_header *table)
while (p < end) {
m = (struct ivmd_header *)p;
if (m->flags & (IVMD_FLAG_UNITY_MAP | IVMD_FLAG_EXCL_RANGE))
- init_unity_map_range(m);
+ init_unity_map_range(m, table);
p += m->length;
}
@@ -2909,15 +2933,6 @@ static int __init early_amd_iommu_init(void)
amd_iommu_target_ivhd_type = get_highest_supported_ivhd_type(ivrs_base);
DUMP_printk("Using IVHD type %#x\n", amd_iommu_target_ivhd_type);
- /*
- * First parse ACPI tables to find the largest Bus/Dev/Func
- * we need to handle. Upon this information the shared data
- * structures for the IOMMUs in the system will be allocated
- */
- ret = find_last_devid_acpi(ivrs_base);
- if (ret)
- goto out;
-
dev_table_size = tbl_size(DEV_TABLE_ENTRY_SIZE);
alias_table_size = tbl_size(ALIAS_TABLE_ENTRY_SIZE);
rlookup_table_size = tbl_size(RLOOKUP_TABLE_ENTRY_SIZE);
generated by cgit v1.2.3 (git 2.39.1) at 2025-04-16 05:33:41 +0000