2 * Copyright (C) 2007-2008 Advanced Micro Devices, Inc.
3 * Author: Joerg Roedel <joerg.roedel@amd.com>
4 * Leo Duran <leo.duran@amd.com>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #include <linux/pci.h>
21 #include <linux/acpi.h>
22 #include <linux/gfp.h>
23 #include <linux/list.h>
24 #include <asm/pci-direct.h>
25 #include <asm/amd_iommu_types.h>
29 * definitions for the ACPI scanning code
31 #define UPDATE_LAST_BDF(x) do {\
32 if ((x) > amd_iommu_last_bdf) \
33 amd_iommu_last_bdf = (x); \
36 #define DEVID(bus, devfn) (((bus) << 8) | (devfn))
37 #define PCI_BUS(x) (((x) >> 8) & 0xff)
38 #define IVRS_HEADER_LENGTH 48
39 #define TBL_SIZE(x) (1 << (PAGE_SHIFT + get_order(amd_iommu_last_bdf * (x))))
41 #define ACPI_IVHD_TYPE 0x10
42 #define ACPI_IVMD_TYPE_ALL 0x20
43 #define ACPI_IVMD_TYPE 0x21
44 #define ACPI_IVMD_TYPE_RANGE 0x22
46 #define IVHD_DEV_ALL 0x01
47 #define IVHD_DEV_SELECT 0x02
48 #define IVHD_DEV_SELECT_RANGE_START 0x03
49 #define IVHD_DEV_RANGE_END 0x04
50 #define IVHD_DEV_ALIAS 0x42
51 #define IVHD_DEV_ALIAS_RANGE 0x43
52 #define IVHD_DEV_EXT_SELECT 0x46
53 #define IVHD_DEV_EXT_SELECT_RANGE 0x47
55 #define IVHD_FLAG_HT_TUN_EN 0x00
56 #define IVHD_FLAG_PASSPW_EN 0x01
57 #define IVHD_FLAG_RESPASSPW_EN 0x02
58 #define IVHD_FLAG_ISOC_EN 0x03
60 #define IVMD_FLAG_EXCL_RANGE 0x08
61 #define IVMD_FLAG_UNITY_MAP 0x01
63 #define ACPI_DEVFLAG_INITPASS 0x01
64 #define ACPI_DEVFLAG_EXTINT 0x02
65 #define ACPI_DEVFLAG_NMI 0x04
66 #define ACPI_DEVFLAG_SYSMGT1 0x10
67 #define ACPI_DEVFLAG_SYSMGT2 0x20
68 #define ACPI_DEVFLAG_LINT0 0x40
69 #define ACPI_DEVFLAG_LINT1 0x80
70 #define ACPI_DEVFLAG_ATSDIS 0x10000000
82 } __attribute__((packed));
89 } __attribute__((packed));
100 } __attribute__((packed));
102 static int __initdata amd_iommu_disable;
104 u16 amd_iommu_last_bdf;
105 struct list_head amd_iommu_unity_map;
106 unsigned amd_iommu_aperture_order = 26;
107 int amd_iommu_isolate;
109 struct list_head amd_iommu_list;
110 struct dev_table_entry *amd_iommu_dev_table;
111 u16 *amd_iommu_alias_table;
112 struct amd_iommu **amd_iommu_rlookup_table;
113 struct protection_domain **amd_iommu_pd_table;
114 unsigned long *amd_iommu_pd_alloc_bitmap;
116 static u32 dev_table_size;
117 static u32 alias_table_size;
118 static u32 rlookup_table_size;
120 static u8 * __init iommu_map_mmio_space(u64 address)
124 if (!request_mem_region(address, MMIO_REGION_LENGTH, "amd_iommu"))
127 ret = ioremap_nocache(address, MMIO_REGION_LENGTH);
131 release_mem_region(address, MMIO_REGION_LENGTH);
136 static void __init iommu_unmap_mmio_space(struct amd_iommu *iommu)
138 if (iommu->mmio_base)
139 iounmap(iommu->mmio_base);
140 release_mem_region(iommu->mmio_phys, MMIO_REGION_LENGTH);
143 static int __init find_last_devid_on_pci(int bus, int dev, int fn, int cap_ptr)
147 cap = read_pci_config(bus, dev, fn, cap_ptr+MMIO_RANGE_OFFSET);
148 UPDATE_LAST_BDF(DEVID(MMIO_GET_BUS(cap), MMIO_GET_LD(cap)));
153 static int __init find_last_devid_from_ivhd(struct ivhd_header *h)
155 u8 *p = (void *)h, *end = (void *)h;
156 struct ivhd_entry *dev;
161 find_last_devid_on_pci(PCI_BUS(h->devid),
167 dev = (struct ivhd_entry *)p;
169 case IVHD_DEV_SELECT:
170 case IVHD_DEV_RANGE_END:
172 case IVHD_DEV_EXT_SELECT:
173 UPDATE_LAST_BDF(dev->devid);
178 p += 0x04 << (*p >> 6);
186 static int __init find_last_devid_acpi(struct acpi_table_header *table)
189 u8 checksum = 0, *p = (u8 *)table, *end = (u8 *)table;
190 struct ivhd_header *h;
193 * Validate checksum here so we don't need to do it when
194 * we actually parse the table
196 for (i = 0; i < table->length; ++i)
199 /* ACPI table corrupt */
202 p += IVRS_HEADER_LENGTH;
204 end += table->length;
206 h = (struct ivhd_header *)p;
209 find_last_devid_from_ivhd(h);