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![Scott Wood](/assets/img/avatar_default.png)
Several functions in this driver are called from atomic context, and thus raw locks must be used in order to be safe on PREEMPT_RT. This includes paths that must wait for command completion, which is a potential PREEMPT_RT latency concern but not easily avoidable. Signed-off-by: Scott Wood <swood@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
3044 lines
74 KiB
C
3044 lines
74 KiB
C
/*
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* Copyright (C) 2007-2010 Advanced Micro Devices, Inc.
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* Author: Joerg Roedel <jroedel@suse.de>
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* Leo Duran <leo.duran@amd.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/pci.h>
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#include <linux/acpi.h>
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#include <linux/list.h>
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#include <linux/bitmap.h>
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#include <linux/slab.h>
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#include <linux/syscore_ops.h>
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#include <linux/interrupt.h>
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#include <linux/msi.h>
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#include <linux/amd-iommu.h>
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#include <linux/export.h>
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#include <linux/iommu.h>
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#include <linux/kmemleak.h>
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#include <linux/mem_encrypt.h>
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#include <asm/pci-direct.h>
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#include <asm/iommu.h>
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#include <asm/gart.h>
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#include <asm/x86_init.h>
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#include <asm/iommu_table.h>
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#include <asm/io_apic.h>
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#include <asm/irq_remapping.h>
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#include <linux/crash_dump.h>
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#include "amd_iommu_proto.h"
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#include "amd_iommu_types.h"
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#include "irq_remapping.h"
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/*
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* definitions for the ACPI scanning code
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*/
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#define IVRS_HEADER_LENGTH 48
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#define ACPI_IVHD_TYPE_MAX_SUPPORTED 0x40
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#define ACPI_IVMD_TYPE_ALL 0x20
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#define ACPI_IVMD_TYPE 0x21
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#define ACPI_IVMD_TYPE_RANGE 0x22
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#define IVHD_DEV_ALL 0x01
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#define IVHD_DEV_SELECT 0x02
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#define IVHD_DEV_SELECT_RANGE_START 0x03
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#define IVHD_DEV_RANGE_END 0x04
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#define IVHD_DEV_ALIAS 0x42
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#define IVHD_DEV_ALIAS_RANGE 0x43
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#define IVHD_DEV_EXT_SELECT 0x46
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#define IVHD_DEV_EXT_SELECT_RANGE 0x47
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#define IVHD_DEV_SPECIAL 0x48
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#define IVHD_DEV_ACPI_HID 0xf0
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#define UID_NOT_PRESENT 0
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#define UID_IS_INTEGER 1
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#define UID_IS_CHARACTER 2
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#define IVHD_SPECIAL_IOAPIC 1
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#define IVHD_SPECIAL_HPET 2
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#define IVHD_FLAG_HT_TUN_EN_MASK 0x01
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#define IVHD_FLAG_PASSPW_EN_MASK 0x02
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#define IVHD_FLAG_RESPASSPW_EN_MASK 0x04
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#define IVHD_FLAG_ISOC_EN_MASK 0x08
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#define IVMD_FLAG_EXCL_RANGE 0x08
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#define IVMD_FLAG_UNITY_MAP 0x01
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#define ACPI_DEVFLAG_INITPASS 0x01
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#define ACPI_DEVFLAG_EXTINT 0x02
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#define ACPI_DEVFLAG_NMI 0x04
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#define ACPI_DEVFLAG_SYSMGT1 0x10
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#define ACPI_DEVFLAG_SYSMGT2 0x20
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#define ACPI_DEVFLAG_LINT0 0x40
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#define ACPI_DEVFLAG_LINT1 0x80
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#define ACPI_DEVFLAG_ATSDIS 0x10000000
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#define LOOP_TIMEOUT 100000
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/*
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* ACPI table definitions
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*
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* These data structures are laid over the table to parse the important values
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* out of it.
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*/
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extern const struct iommu_ops amd_iommu_ops;
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/*
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* structure describing one IOMMU in the ACPI table. Typically followed by one
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* or more ivhd_entrys.
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*/
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struct ivhd_header {
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u8 type;
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u8 flags;
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u16 length;
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u16 devid;
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u16 cap_ptr;
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u64 mmio_phys;
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u16 pci_seg;
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u16 info;
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u32 efr_attr;
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/* Following only valid on IVHD type 11h and 40h */
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u64 efr_reg; /* Exact copy of MMIO_EXT_FEATURES */
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u64 res;
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} __attribute__((packed));
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/*
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* A device entry describing which devices a specific IOMMU translates and
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* which requestor ids they use.
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*/
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struct ivhd_entry {
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u8 type;
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u16 devid;
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u8 flags;
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u32 ext;
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u32 hidh;
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u64 cid;
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u8 uidf;
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u8 uidl;
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u8 uid;
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} __attribute__((packed));
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/*
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* An AMD IOMMU memory definition structure. It defines things like exclusion
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* ranges for devices and regions that should be unity mapped.
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*/
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struct ivmd_header {
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u8 type;
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u8 flags;
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u16 length;
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u16 devid;
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u16 aux;
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u64 resv;
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u64 range_start;
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u64 range_length;
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} __attribute__((packed));
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bool amd_iommu_dump;
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bool amd_iommu_irq_remap __read_mostly;
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int amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_VAPIC;
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static bool amd_iommu_detected;
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static bool __initdata amd_iommu_disabled;
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static int amd_iommu_target_ivhd_type;
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u16 amd_iommu_last_bdf; /* largest PCI device id we have
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to handle */
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LIST_HEAD(amd_iommu_unity_map); /* a list of required unity mappings
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we find in ACPI */
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bool amd_iommu_unmap_flush; /* if true, flush on every unmap */
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LIST_HEAD(amd_iommu_list); /* list of all AMD IOMMUs in the
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system */
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/* Array to assign indices to IOMMUs*/
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struct amd_iommu *amd_iommus[MAX_IOMMUS];
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/* Number of IOMMUs present in the system */
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static int amd_iommus_present;
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/* IOMMUs have a non-present cache? */
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bool amd_iommu_np_cache __read_mostly;
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bool amd_iommu_iotlb_sup __read_mostly = true;
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u32 amd_iommu_max_pasid __read_mostly = ~0;
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bool amd_iommu_v2_present __read_mostly;
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static bool amd_iommu_pc_present __read_mostly;
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bool amd_iommu_force_isolation __read_mostly;
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/*
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* List of protection domains - used during resume
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*/
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LIST_HEAD(amd_iommu_pd_list);
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spinlock_t amd_iommu_pd_lock;
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/*
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* Pointer to the device table which is shared by all AMD IOMMUs
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* it is indexed by the PCI device id or the HT unit id and contains
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* information about the domain the device belongs to as well as the
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* page table root pointer.
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*/
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struct dev_table_entry *amd_iommu_dev_table;
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/*
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* Pointer to a device table which the content of old device table
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* will be copied to. It's only be used in kdump kernel.
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*/
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static struct dev_table_entry *old_dev_tbl_cpy;
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/*
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* The alias table is a driver specific data structure which contains the
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* mappings of the PCI device ids to the actual requestor ids on the IOMMU.
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* More than one device can share the same requestor id.
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*/
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u16 *amd_iommu_alias_table;
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/*
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* The rlookup table is used to find the IOMMU which is responsible
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* for a specific device. It is also indexed by the PCI device id.
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*/
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struct amd_iommu **amd_iommu_rlookup_table;
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EXPORT_SYMBOL(amd_iommu_rlookup_table);
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/*
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* This table is used to find the irq remapping table for a given device id
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* quickly.
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*/
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struct irq_remap_table **irq_lookup_table;
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/*
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* AMD IOMMU allows up to 2^16 different protection domains. This is a bitmap
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* to know which ones are already in use.
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*/
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unsigned long *amd_iommu_pd_alloc_bitmap;
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static u32 dev_table_size; /* size of the device table */
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static u32 alias_table_size; /* size of the alias table */
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static u32 rlookup_table_size; /* size if the rlookup table */
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enum iommu_init_state {
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IOMMU_START_STATE,
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IOMMU_IVRS_DETECTED,
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IOMMU_ACPI_FINISHED,
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IOMMU_ENABLED,
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IOMMU_PCI_INIT,
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IOMMU_INTERRUPTS_EN,
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IOMMU_DMA_OPS,
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IOMMU_INITIALIZED,
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IOMMU_NOT_FOUND,
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IOMMU_INIT_ERROR,
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IOMMU_CMDLINE_DISABLED,
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};
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/* Early ioapic and hpet maps from kernel command line */
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#define EARLY_MAP_SIZE 4
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static struct devid_map __initdata early_ioapic_map[EARLY_MAP_SIZE];
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static struct devid_map __initdata early_hpet_map[EARLY_MAP_SIZE];
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static struct acpihid_map_entry __initdata early_acpihid_map[EARLY_MAP_SIZE];
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static int __initdata early_ioapic_map_size;
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static int __initdata early_hpet_map_size;
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static int __initdata early_acpihid_map_size;
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static bool __initdata cmdline_maps;
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static enum iommu_init_state init_state = IOMMU_START_STATE;
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static int amd_iommu_enable_interrupts(void);
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static int __init iommu_go_to_state(enum iommu_init_state state);
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static void init_device_table_dma(void);
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static bool amd_iommu_pre_enabled = true;
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bool translation_pre_enabled(struct amd_iommu *iommu)
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{
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return (iommu->flags & AMD_IOMMU_FLAG_TRANS_PRE_ENABLED);
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}
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EXPORT_SYMBOL(translation_pre_enabled);
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static void clear_translation_pre_enabled(struct amd_iommu *iommu)
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{
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iommu->flags &= ~AMD_IOMMU_FLAG_TRANS_PRE_ENABLED;
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}
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static void init_translation_status(struct amd_iommu *iommu)
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{
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u32 ctrl;
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ctrl = readl(iommu->mmio_base + MMIO_CONTROL_OFFSET);
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if (ctrl & (1<<CONTROL_IOMMU_EN))
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iommu->flags |= AMD_IOMMU_FLAG_TRANS_PRE_ENABLED;
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}
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static inline void update_last_devid(u16 devid)
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{
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if (devid > amd_iommu_last_bdf)
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amd_iommu_last_bdf = devid;
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}
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static inline unsigned long tbl_size(int entry_size)
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{
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unsigned shift = PAGE_SHIFT +
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get_order(((int)amd_iommu_last_bdf + 1) * entry_size);
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return 1UL << shift;
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}
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int amd_iommu_get_num_iommus(void)
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{
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return amd_iommus_present;
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}
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/* Access to l1 and l2 indexed register spaces */
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static u32 iommu_read_l1(struct amd_iommu *iommu, u16 l1, u8 address)
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{
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u32 val;
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pci_write_config_dword(iommu->dev, 0xf8, (address | l1 << 16));
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pci_read_config_dword(iommu->dev, 0xfc, &val);
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return val;
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}
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static void iommu_write_l1(struct amd_iommu *iommu, u16 l1, u8 address, u32 val)
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{
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pci_write_config_dword(iommu->dev, 0xf8, (address | l1 << 16 | 1 << 31));
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pci_write_config_dword(iommu->dev, 0xfc, val);
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pci_write_config_dword(iommu->dev, 0xf8, (address | l1 << 16));
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}
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static u32 iommu_read_l2(struct amd_iommu *iommu, u8 address)
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{
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u32 val;
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pci_write_config_dword(iommu->dev, 0xf0, address);
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pci_read_config_dword(iommu->dev, 0xf4, &val);
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return val;
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}
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static void iommu_write_l2(struct amd_iommu *iommu, u8 address, u32 val)
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{
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pci_write_config_dword(iommu->dev, 0xf0, (address | 1 << 8));
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pci_write_config_dword(iommu->dev, 0xf4, val);
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}
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/****************************************************************************
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*
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* AMD IOMMU MMIO register space handling functions
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*
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* These functions are used to program the IOMMU device registers in
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* MMIO space required for that driver.
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*
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****************************************************************************/
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/*
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* This function set the exclusion range in the IOMMU. DMA accesses to the
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* exclusion range are passed through untranslated
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*/
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static void iommu_set_exclusion_range(struct amd_iommu *iommu)
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{
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u64 start = iommu->exclusion_start & PAGE_MASK;
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u64 limit = (start + iommu->exclusion_length) & PAGE_MASK;
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u64 entry;
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if (!iommu->exclusion_start)
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return;
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entry = start | MMIO_EXCL_ENABLE_MASK;
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memcpy_toio(iommu->mmio_base + MMIO_EXCL_BASE_OFFSET,
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&entry, sizeof(entry));
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entry = limit;
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memcpy_toio(iommu->mmio_base + MMIO_EXCL_LIMIT_OFFSET,
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&entry, sizeof(entry));
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}
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/* Programs the physical address of the device table into the IOMMU hardware */
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static void iommu_set_device_table(struct amd_iommu *iommu)
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{
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u64 entry;
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BUG_ON(iommu->mmio_base == NULL);
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entry = iommu_virt_to_phys(amd_iommu_dev_table);
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entry |= (dev_table_size >> 12) - 1;
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memcpy_toio(iommu->mmio_base + MMIO_DEV_TABLE_OFFSET,
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&entry, sizeof(entry));
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}
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/* Generic functions to enable/disable certain features of the IOMMU. */
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static void iommu_feature_enable(struct amd_iommu *iommu, u8 bit)
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{
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u32 ctrl;
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ctrl = readl(iommu->mmio_base + MMIO_CONTROL_OFFSET);
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ctrl |= (1 << bit);
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writel(ctrl, iommu->mmio_base + MMIO_CONTROL_OFFSET);
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}
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static void iommu_feature_disable(struct amd_iommu *iommu, u8 bit)
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{
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u32 ctrl;
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ctrl = readl(iommu->mmio_base + MMIO_CONTROL_OFFSET);
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ctrl &= ~(1 << bit);
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writel(ctrl, iommu->mmio_base + MMIO_CONTROL_OFFSET);
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}
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static void iommu_set_inv_tlb_timeout(struct amd_iommu *iommu, int timeout)
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{
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u32 ctrl;
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ctrl = readl(iommu->mmio_base + MMIO_CONTROL_OFFSET);
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ctrl &= ~CTRL_INV_TO_MASK;
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ctrl |= (timeout << CONTROL_INV_TIMEOUT) & CTRL_INV_TO_MASK;
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writel(ctrl, iommu->mmio_base + MMIO_CONTROL_OFFSET);
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}
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/* Function to enable the hardware */
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static void iommu_enable(struct amd_iommu *iommu)
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{
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iommu_feature_enable(iommu, CONTROL_IOMMU_EN);
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}
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static void iommu_disable(struct amd_iommu *iommu)
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{
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/* Disable command buffer */
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iommu_feature_disable(iommu, CONTROL_CMDBUF_EN);
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/* Disable event logging and event interrupts */
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iommu_feature_disable(iommu, CONTROL_EVT_INT_EN);
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iommu_feature_disable(iommu, CONTROL_EVT_LOG_EN);
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/* Disable IOMMU GA_LOG */
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iommu_feature_disable(iommu, CONTROL_GALOG_EN);
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iommu_feature_disable(iommu, CONTROL_GAINT_EN);
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/* Disable IOMMU hardware itself */
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iommu_feature_disable(iommu, CONTROL_IOMMU_EN);
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}
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/*
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* mapping and unmapping functions for the IOMMU MMIO space. Each AMD IOMMU in
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* the system has one.
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*/
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static u8 __iomem * __init iommu_map_mmio_space(u64 address, u64 end)
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{
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if (!request_mem_region(address, end, "amd_iommu")) {
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pr_err("AMD-Vi: Can not reserve memory region %llx-%llx for mmio\n",
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address, end);
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pr_err("AMD-Vi: This is a BIOS bug. Please contact your hardware vendor\n");
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return NULL;
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}
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return (u8 __iomem *)ioremap_nocache(address, end);
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}
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static void __init iommu_unmap_mmio_space(struct amd_iommu *iommu)
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{
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if (iommu->mmio_base)
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iounmap(iommu->mmio_base);
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release_mem_region(iommu->mmio_phys, iommu->mmio_phys_end);
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}
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static inline u32 get_ivhd_header_size(struct ivhd_header *h)
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{
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u32 size = 0;
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switch (h->type) {
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case 0x10:
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size = 24;
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break;
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case 0x11:
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case 0x40:
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size = 40;
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break;
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}
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return size;
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}
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|
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/****************************************************************************
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*
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* The functions below belong to the first pass of AMD IOMMU ACPI table
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* parsing. In this pass we try to find out the highest device id this
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* code has to handle. Upon this information the size of the shared data
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* structures is determined later.
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*
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****************************************************************************/
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/*
|
|
* This function calculates the length of a given IVHD entry
|
|
*/
|
|
static inline int ivhd_entry_length(u8 *ivhd)
|
|
{
|
|
u32 type = ((struct ivhd_entry *)ivhd)->type;
|
|
|
|
if (type < 0x80) {
|
|
return 0x04 << (*ivhd >> 6);
|
|
} else if (type == IVHD_DEV_ACPI_HID) {
|
|
/* For ACPI_HID, offset 21 is uid len */
|
|
return *((u8 *)ivhd + 21) + 22;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* After reading the highest device id from the IOMMU PCI capability header
|
|
* this function looks if there is a higher device id defined in the ACPI table
|
|
*/
|
|
static int __init find_last_devid_from_ivhd(struct ivhd_header *h)
|
|
{
|
|
u8 *p = (void *)h, *end = (void *)h;
|
|
struct ivhd_entry *dev;
|
|
|
|
u32 ivhd_size = get_ivhd_header_size(h);
|
|
|
|
if (!ivhd_size) {
|
|
pr_err("AMD-Vi: Unsupported IVHD type %#x\n", h->type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
p += ivhd_size;
|
|
end += h->length;
|
|
|
|
while (p < end) {
|
|
dev = (struct ivhd_entry *)p;
|
|
switch (dev->type) {
|
|
case IVHD_DEV_ALL:
|
|
/* Use maximum BDF value for DEV_ALL */
|
|
update_last_devid(0xffff);
|
|
break;
|
|
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);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
p += ivhd_entry_length(p);
|
|
}
|
|
|
|
WARN_ON(p != end);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init check_ivrs_checksum(struct acpi_table_header *table)
|
|
{
|
|
int i;
|
|
u8 checksum = 0, *p = (u8 *)table;
|
|
|
|
for (i = 0; i < table->length; ++i)
|
|
checksum += p[i];
|
|
if (checksum != 0) {
|
|
/* ACPI table corrupt */
|
|
pr_err(FW_BUG "AMD-Vi: IVRS invalid checksum\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Iterate over all IVHD entries in the ACPI table and find the highest device
|
|
* 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)
|
|
{
|
|
u8 *p = (u8 *)table, *end = (u8 *)table;
|
|
struct ivhd_header *h;
|
|
|
|
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;
|
|
}
|
|
p += h->length;
|
|
}
|
|
WARN_ON(p != end);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* The following functions belong to the code path which parses the ACPI table
|
|
* the second time. In this ACPI parsing iteration we allocate IOMMU specific
|
|
* data structures, initialize the device/alias/rlookup table and also
|
|
* basically initialize the hardware.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/*
|
|
* Allocates the command buffer. This buffer is per AMD IOMMU. We can
|
|
* write commands to that buffer later and the IOMMU will execute them
|
|
* asynchronously
|
|
*/
|
|
static int __init alloc_command_buffer(struct amd_iommu *iommu)
|
|
{
|
|
iommu->cmd_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
|
|
get_order(CMD_BUFFER_SIZE));
|
|
|
|
return iommu->cmd_buf ? 0 : -ENOMEM;
|
|
}
|
|
|
|
/*
|
|
* This function resets the command buffer if the IOMMU stopped fetching
|
|
* commands from it.
|
|
*/
|
|
void amd_iommu_reset_cmd_buffer(struct amd_iommu *iommu)
|
|
{
|
|
iommu_feature_disable(iommu, CONTROL_CMDBUF_EN);
|
|
|
|
writel(0x00, iommu->mmio_base + MMIO_CMD_HEAD_OFFSET);
|
|
writel(0x00, iommu->mmio_base + MMIO_CMD_TAIL_OFFSET);
|
|
iommu->cmd_buf_head = 0;
|
|
iommu->cmd_buf_tail = 0;
|
|
|
|
iommu_feature_enable(iommu, CONTROL_CMDBUF_EN);
|
|
}
|
|
|
|
/*
|
|
* This function writes the command buffer address to the hardware and
|
|
* enables it.
|
|
*/
|
|
static void iommu_enable_command_buffer(struct amd_iommu *iommu)
|
|
{
|
|
u64 entry;
|
|
|
|
BUG_ON(iommu->cmd_buf == NULL);
|
|
|
|
entry = iommu_virt_to_phys(iommu->cmd_buf);
|
|
entry |= MMIO_CMD_SIZE_512;
|
|
|
|
memcpy_toio(iommu->mmio_base + MMIO_CMD_BUF_OFFSET,
|
|
&entry, sizeof(entry));
|
|
|
|
amd_iommu_reset_cmd_buffer(iommu);
|
|
}
|
|
|
|
/*
|
|
* This function disables the command buffer
|
|
*/
|
|
static void iommu_disable_command_buffer(struct amd_iommu *iommu)
|
|
{
|
|
iommu_feature_disable(iommu, CONTROL_CMDBUF_EN);
|
|
}
|
|
|
|
static void __init free_command_buffer(struct amd_iommu *iommu)
|
|
{
|
|
free_pages((unsigned long)iommu->cmd_buf, get_order(CMD_BUFFER_SIZE));
|
|
}
|
|
|
|
/* allocates the memory where the IOMMU will log its events to */
|
|
static int __init alloc_event_buffer(struct amd_iommu *iommu)
|
|
{
|
|
iommu->evt_buf = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
|
|
get_order(EVT_BUFFER_SIZE));
|
|
|
|
return iommu->evt_buf ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static void iommu_enable_event_buffer(struct amd_iommu *iommu)
|
|
{
|
|
u64 entry;
|
|
|
|
BUG_ON(iommu->evt_buf == NULL);
|
|
|
|
entry = iommu_virt_to_phys(iommu->evt_buf) | EVT_LEN_MASK;
|
|
|
|
memcpy_toio(iommu->mmio_base + MMIO_EVT_BUF_OFFSET,
|
|
&entry, sizeof(entry));
|
|
|
|
/* set head and tail to zero manually */
|
|
writel(0x00, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET);
|
|
writel(0x00, iommu->mmio_base + MMIO_EVT_TAIL_OFFSET);
|
|
|
|
iommu_feature_enable(iommu, CONTROL_EVT_LOG_EN);
|
|
}
|
|
|
|
/*
|
|
* This function disables the event log buffer
|
|
*/
|
|
static void iommu_disable_event_buffer(struct amd_iommu *iommu)
|
|
{
|
|
iommu_feature_disable(iommu, CONTROL_EVT_LOG_EN);
|
|
}
|
|
|
|
static void __init free_event_buffer(struct amd_iommu *iommu)
|
|
{
|
|
free_pages((unsigned long)iommu->evt_buf, get_order(EVT_BUFFER_SIZE));
|
|
}
|
|
|
|
/* allocates the memory where the IOMMU will log its events to */
|
|
static int __init alloc_ppr_log(struct amd_iommu *iommu)
|
|
{
|
|
iommu->ppr_log = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
|
|
get_order(PPR_LOG_SIZE));
|
|
|
|
return iommu->ppr_log ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static void iommu_enable_ppr_log(struct amd_iommu *iommu)
|
|
{
|
|
u64 entry;
|
|
|
|
if (iommu->ppr_log == NULL)
|
|
return;
|
|
|
|
entry = iommu_virt_to_phys(iommu->ppr_log) | PPR_LOG_SIZE_512;
|
|
|
|
memcpy_toio(iommu->mmio_base + MMIO_PPR_LOG_OFFSET,
|
|
&entry, sizeof(entry));
|
|
|
|
/* set head and tail to zero manually */
|
|
writel(0x00, iommu->mmio_base + MMIO_PPR_HEAD_OFFSET);
|
|
writel(0x00, iommu->mmio_base + MMIO_PPR_TAIL_OFFSET);
|
|
|
|
iommu_feature_enable(iommu, CONTROL_PPFLOG_EN);
|
|
iommu_feature_enable(iommu, CONTROL_PPR_EN);
|
|
}
|
|
|
|
static void __init free_ppr_log(struct amd_iommu *iommu)
|
|
{
|
|
if (iommu->ppr_log == NULL)
|
|
return;
|
|
|
|
free_pages((unsigned long)iommu->ppr_log, get_order(PPR_LOG_SIZE));
|
|
}
|
|
|
|
static void free_ga_log(struct amd_iommu *iommu)
|
|
{
|
|
#ifdef CONFIG_IRQ_REMAP
|
|
if (iommu->ga_log)
|
|
free_pages((unsigned long)iommu->ga_log,
|
|
get_order(GA_LOG_SIZE));
|
|
if (iommu->ga_log_tail)
|
|
free_pages((unsigned long)iommu->ga_log_tail,
|
|
get_order(8));
|
|
#endif
|
|
}
|
|
|
|
static int iommu_ga_log_enable(struct amd_iommu *iommu)
|
|
{
|
|
#ifdef CONFIG_IRQ_REMAP
|
|
u32 status, i;
|
|
|
|
if (!iommu->ga_log)
|
|
return -EINVAL;
|
|
|
|
status = readl(iommu->mmio_base + MMIO_STATUS_OFFSET);
|
|
|
|
/* Check if already running */
|
|
if (status & (MMIO_STATUS_GALOG_RUN_MASK))
|
|
return 0;
|
|
|
|
iommu_feature_enable(iommu, CONTROL_GAINT_EN);
|
|
iommu_feature_enable(iommu, CONTROL_GALOG_EN);
|
|
|
|
for (i = 0; i < LOOP_TIMEOUT; ++i) {
|
|
status = readl(iommu->mmio_base + MMIO_STATUS_OFFSET);
|
|
if (status & (MMIO_STATUS_GALOG_RUN_MASK))
|
|
break;
|
|
}
|
|
|
|
if (i >= LOOP_TIMEOUT)
|
|
return -EINVAL;
|
|
#endif /* CONFIG_IRQ_REMAP */
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_IRQ_REMAP
|
|
static int iommu_init_ga_log(struct amd_iommu *iommu)
|
|
{
|
|
u64 entry;
|
|
|
|
if (!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir))
|
|
return 0;
|
|
|
|
iommu->ga_log = (u8 *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
|
|
get_order(GA_LOG_SIZE));
|
|
if (!iommu->ga_log)
|
|
goto err_out;
|
|
|
|
iommu->ga_log_tail = (u8 *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
|
|
get_order(8));
|
|
if (!iommu->ga_log_tail)
|
|
goto err_out;
|
|
|
|
entry = iommu_virt_to_phys(iommu->ga_log) | GA_LOG_SIZE_512;
|
|
memcpy_toio(iommu->mmio_base + MMIO_GA_LOG_BASE_OFFSET,
|
|
&entry, sizeof(entry));
|
|
entry = (iommu_virt_to_phys(iommu->ga_log) & 0xFFFFFFFFFFFFFULL) & ~7ULL;
|
|
memcpy_toio(iommu->mmio_base + MMIO_GA_LOG_TAIL_OFFSET,
|
|
&entry, sizeof(entry));
|
|
writel(0x00, iommu->mmio_base + MMIO_GA_HEAD_OFFSET);
|
|
writel(0x00, iommu->mmio_base + MMIO_GA_TAIL_OFFSET);
|
|
|
|
return 0;
|
|
err_out:
|
|
free_ga_log(iommu);
|
|
return -EINVAL;
|
|
}
|
|
#endif /* CONFIG_IRQ_REMAP */
|
|
|
|
static int iommu_init_ga(struct amd_iommu *iommu)
|
|
{
|
|
int ret = 0;
|
|
|
|
#ifdef CONFIG_IRQ_REMAP
|
|
/* Note: We have already checked GASup from IVRS table.
|
|
* Now, we need to make sure that GAMSup is set.
|
|
*/
|
|
if (AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir) &&
|
|
!iommu_feature(iommu, FEATURE_GAM_VAPIC))
|
|
amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY_GA;
|
|
|
|
ret = iommu_init_ga_log(iommu);
|
|
#endif /* CONFIG_IRQ_REMAP */
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void iommu_enable_gt(struct amd_iommu *iommu)
|
|
{
|
|
if (!iommu_feature(iommu, FEATURE_GT))
|
|
return;
|
|
|
|
iommu_feature_enable(iommu, CONTROL_GT_EN);
|
|
}
|
|
|
|
/* sets a specific bit in the device table entry. */
|
|
static void set_dev_entry_bit(u16 devid, u8 bit)
|
|
{
|
|
int i = (bit >> 6) & 0x03;
|
|
int _bit = bit & 0x3f;
|
|
|
|
amd_iommu_dev_table[devid].data[i] |= (1UL << _bit);
|
|
}
|
|
|
|
static int get_dev_entry_bit(u16 devid, u8 bit)
|
|
{
|
|
int i = (bit >> 6) & 0x03;
|
|
int _bit = bit & 0x3f;
|
|
|
|
return (amd_iommu_dev_table[devid].data[i] & (1UL << _bit)) >> _bit;
|
|
}
|
|
|
|
|
|
static bool copy_device_table(void)
|
|
{
|
|
u64 int_ctl, int_tab_len, entry = 0, last_entry = 0;
|
|
struct dev_table_entry *old_devtb = NULL;
|
|
u32 lo, hi, devid, old_devtb_size;
|
|
phys_addr_t old_devtb_phys;
|
|
struct amd_iommu *iommu;
|
|
u16 dom_id, dte_v, irq_v;
|
|
gfp_t gfp_flag;
|
|
u64 tmp;
|
|
|
|
if (!amd_iommu_pre_enabled)
|
|
return false;
|
|
|
|
pr_warn("Translation is already enabled - trying to copy translation structures\n");
|
|
for_each_iommu(iommu) {
|
|
/* All IOMMUs should use the same device table with the same size */
|
|
lo = readl(iommu->mmio_base + MMIO_DEV_TABLE_OFFSET);
|
|
hi = readl(iommu->mmio_base + MMIO_DEV_TABLE_OFFSET + 4);
|
|
entry = (((u64) hi) << 32) + lo;
|
|
if (last_entry && last_entry != entry) {
|
|
pr_err("IOMMU:%d should use the same dev table as others!\n",
|
|
iommu->index);
|
|
return false;
|
|
}
|
|
last_entry = entry;
|
|
|
|
old_devtb_size = ((entry & ~PAGE_MASK) + 1) << 12;
|
|
if (old_devtb_size != dev_table_size) {
|
|
pr_err("The device table size of IOMMU:%d is not expected!\n",
|
|
iommu->index);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
old_devtb_phys = entry & PAGE_MASK;
|
|
if (old_devtb_phys >= 0x100000000ULL) {
|
|
pr_err("The address of old device table is above 4G, not trustworthy!\n");
|
|
return false;
|
|
}
|
|
old_devtb = memremap(old_devtb_phys, dev_table_size, MEMREMAP_WB);
|
|
if (!old_devtb)
|
|
return false;
|
|
|
|
gfp_flag = GFP_KERNEL | __GFP_ZERO | GFP_DMA32;
|
|
old_dev_tbl_cpy = (void *)__get_free_pages(gfp_flag,
|
|
get_order(dev_table_size));
|
|
if (old_dev_tbl_cpy == NULL) {
|
|
pr_err("Failed to allocate memory for copying old device table!\n");
|
|
return false;
|
|
}
|
|
|
|
for (devid = 0; devid <= amd_iommu_last_bdf; ++devid) {
|
|
old_dev_tbl_cpy[devid] = old_devtb[devid];
|
|
dom_id = old_devtb[devid].data[1] & DEV_DOMID_MASK;
|
|
dte_v = old_devtb[devid].data[0] & DTE_FLAG_V;
|
|
|
|
if (dte_v && dom_id) {
|
|
old_dev_tbl_cpy[devid].data[0] = old_devtb[devid].data[0];
|
|
old_dev_tbl_cpy[devid].data[1] = old_devtb[devid].data[1];
|
|
__set_bit(dom_id, amd_iommu_pd_alloc_bitmap);
|
|
/* If gcr3 table existed, mask it out */
|
|
if (old_devtb[devid].data[0] & DTE_FLAG_GV) {
|
|
tmp = DTE_GCR3_VAL_B(~0ULL) << DTE_GCR3_SHIFT_B;
|
|
tmp |= DTE_GCR3_VAL_C(~0ULL) << DTE_GCR3_SHIFT_C;
|
|
old_dev_tbl_cpy[devid].data[1] &= ~tmp;
|
|
tmp = DTE_GCR3_VAL_A(~0ULL) << DTE_GCR3_SHIFT_A;
|
|
tmp |= DTE_FLAG_GV;
|
|
old_dev_tbl_cpy[devid].data[0] &= ~tmp;
|
|
}
|
|
}
|
|
|
|
irq_v = old_devtb[devid].data[2] & DTE_IRQ_REMAP_ENABLE;
|
|
int_ctl = old_devtb[devid].data[2] & DTE_IRQ_REMAP_INTCTL_MASK;
|
|
int_tab_len = old_devtb[devid].data[2] & DTE_IRQ_TABLE_LEN_MASK;
|
|
if (irq_v && (int_ctl || int_tab_len)) {
|
|
if ((int_ctl != DTE_IRQ_REMAP_INTCTL) ||
|
|
(int_tab_len != DTE_IRQ_TABLE_LEN)) {
|
|
pr_err("Wrong old irq remapping flag: %#x\n", devid);
|
|
return false;
|
|
}
|
|
|
|
old_dev_tbl_cpy[devid].data[2] = old_devtb[devid].data[2];
|
|
}
|
|
}
|
|
memunmap(old_devtb);
|
|
|
|
return true;
|
|
}
|
|
|
|
void amd_iommu_apply_erratum_63(u16 devid)
|
|
{
|
|
int sysmgt;
|
|
|
|
sysmgt = get_dev_entry_bit(devid, DEV_ENTRY_SYSMGT1) |
|
|
(get_dev_entry_bit(devid, DEV_ENTRY_SYSMGT2) << 1);
|
|
|
|
if (sysmgt == 0x01)
|
|
set_dev_entry_bit(devid, DEV_ENTRY_IW);
|
|
}
|
|
|
|
/* Writes the specific IOMMU for a device into the rlookup table */
|
|
static void __init set_iommu_for_device(struct amd_iommu *iommu, u16 devid)
|
|
{
|
|
amd_iommu_rlookup_table[devid] = iommu;
|
|
}
|
|
|
|
/*
|
|
* This function takes the device specific flags read from the ACPI
|
|
* table and sets up the device table entry with that information
|
|
*/
|
|
static void __init set_dev_entry_from_acpi(struct amd_iommu *iommu,
|
|
u16 devid, u32 flags, u32 ext_flags)
|
|
{
|
|
if (flags & ACPI_DEVFLAG_INITPASS)
|
|
set_dev_entry_bit(devid, DEV_ENTRY_INIT_PASS);
|
|
if (flags & ACPI_DEVFLAG_EXTINT)
|
|
set_dev_entry_bit(devid, DEV_ENTRY_EINT_PASS);
|
|
if (flags & ACPI_DEVFLAG_NMI)
|
|
set_dev_entry_bit(devid, DEV_ENTRY_NMI_PASS);
|
|
if (flags & ACPI_DEVFLAG_SYSMGT1)
|
|
set_dev_entry_bit(devid, DEV_ENTRY_SYSMGT1);
|
|
if (flags & ACPI_DEVFLAG_SYSMGT2)
|
|
set_dev_entry_bit(devid, DEV_ENTRY_SYSMGT2);
|
|
if (flags & ACPI_DEVFLAG_LINT0)
|
|
set_dev_entry_bit(devid, DEV_ENTRY_LINT0_PASS);
|
|
if (flags & ACPI_DEVFLAG_LINT1)
|
|
set_dev_entry_bit(devid, DEV_ENTRY_LINT1_PASS);
|
|
|
|
amd_iommu_apply_erratum_63(devid);
|
|
|
|
set_iommu_for_device(iommu, devid);
|
|
}
|
|
|
|
static int __init add_special_device(u8 type, u8 id, u16 *devid, bool cmd_line)
|
|
{
|
|
struct devid_map *entry;
|
|
struct list_head *list;
|
|
|
|
if (type == IVHD_SPECIAL_IOAPIC)
|
|
list = &ioapic_map;
|
|
else if (type == IVHD_SPECIAL_HPET)
|
|
list = &hpet_map;
|
|
else
|
|
return -EINVAL;
|
|
|
|
list_for_each_entry(entry, list, list) {
|
|
if (!(entry->id == id && entry->cmd_line))
|
|
continue;
|
|
|
|
pr_info("AMD-Vi: Command-line override present for %s id %d - ignoring\n",
|
|
type == IVHD_SPECIAL_IOAPIC ? "IOAPIC" : "HPET", id);
|
|
|
|
*devid = entry->devid;
|
|
|
|
return 0;
|
|
}
|
|
|
|
entry = kzalloc(sizeof(*entry), GFP_KERNEL);
|
|
if (!entry)
|
|
return -ENOMEM;
|
|
|
|
entry->id = id;
|
|
entry->devid = *devid;
|
|
entry->cmd_line = cmd_line;
|
|
|
|
list_add_tail(&entry->list, list);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init add_acpi_hid_device(u8 *hid, u8 *uid, u16 *devid,
|
|
bool cmd_line)
|
|
{
|
|
struct acpihid_map_entry *entry;
|
|
struct list_head *list = &acpihid_map;
|
|
|
|
list_for_each_entry(entry, list, list) {
|
|
if (strcmp(entry->hid, hid) ||
|
|
(*uid && *entry->uid && strcmp(entry->uid, uid)) ||
|
|
!entry->cmd_line)
|
|
continue;
|
|
|
|
pr_info("AMD-Vi: Command-line override for hid:%s uid:%s\n",
|
|
hid, uid);
|
|
*devid = entry->devid;
|
|
return 0;
|
|
}
|
|
|
|
entry = kzalloc(sizeof(*entry), GFP_KERNEL);
|
|
if (!entry)
|
|
return -ENOMEM;
|
|
|
|
memcpy(entry->uid, uid, strlen(uid));
|
|
memcpy(entry->hid, hid, strlen(hid));
|
|
entry->devid = *devid;
|
|
entry->cmd_line = cmd_line;
|
|
entry->root_devid = (entry->devid & (~0x7));
|
|
|
|
pr_info("AMD-Vi:%s, add hid:%s, uid:%s, rdevid:%d\n",
|
|
entry->cmd_line ? "cmd" : "ivrs",
|
|
entry->hid, entry->uid, entry->root_devid);
|
|
|
|
list_add_tail(&entry->list, list);
|
|
return 0;
|
|
}
|
|
|
|
static int __init add_early_maps(void)
|
|
{
|
|
int i, ret;
|
|
|
|
for (i = 0; i < early_ioapic_map_size; ++i) {
|
|
ret = add_special_device(IVHD_SPECIAL_IOAPIC,
|
|
early_ioapic_map[i].id,
|
|
&early_ioapic_map[i].devid,
|
|
early_ioapic_map[i].cmd_line);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
for (i = 0; i < early_hpet_map_size; ++i) {
|
|
ret = add_special_device(IVHD_SPECIAL_HPET,
|
|
early_hpet_map[i].id,
|
|
&early_hpet_map[i].devid,
|
|
early_hpet_map[i].cmd_line);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
for (i = 0; i < early_acpihid_map_size; ++i) {
|
|
ret = add_acpi_hid_device(early_acpihid_map[i].hid,
|
|
early_acpihid_map[i].uid,
|
|
&early_acpihid_map[i].devid,
|
|
early_acpihid_map[i].cmd_line);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Reads the device exclusion range from ACPI and initializes the IOMMU with
|
|
* it
|
|
*/
|
|
static void __init set_device_exclusion_range(u16 devid, struct ivmd_header *m)
|
|
{
|
|
struct amd_iommu *iommu = amd_iommu_rlookup_table[devid];
|
|
|
|
if (!(m->flags & IVMD_FLAG_EXCL_RANGE))
|
|
return;
|
|
|
|
if (iommu) {
|
|
/*
|
|
* We only can configure exclusion ranges per IOMMU, not
|
|
* per device. But we can enable the exclusion range per
|
|
* device. This is done here
|
|
*/
|
|
set_dev_entry_bit(devid, DEV_ENTRY_EX);
|
|
iommu->exclusion_start = m->range_start;
|
|
iommu->exclusion_length = m->range_length;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Takes a pointer to an AMD IOMMU entry in the ACPI table and
|
|
* initializes the hardware and our data structures with it.
|
|
*/
|
|
static int __init init_iommu_from_acpi(struct amd_iommu *iommu,
|
|
struct ivhd_header *h)
|
|
{
|
|
u8 *p = (u8 *)h;
|
|
u8 *end = p, flags = 0;
|
|
u16 devid = 0, devid_start = 0, devid_to = 0;
|
|
u32 dev_i, ext_flags = 0;
|
|
bool alias = false;
|
|
struct ivhd_entry *e;
|
|
u32 ivhd_size;
|
|
int ret;
|
|
|
|
|
|
ret = add_early_maps();
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* First save the recommended feature enable bits from ACPI
|
|
*/
|
|
iommu->acpi_flags = h->flags;
|
|
|
|
/*
|
|
* Done. Now parse the device entries
|
|
*/
|
|
ivhd_size = get_ivhd_header_size(h);
|
|
if (!ivhd_size) {
|
|
pr_err("AMD-Vi: Unsupported IVHD type %#x\n", h->type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
p += ivhd_size;
|
|
|
|
end += h->length;
|
|
|
|
|
|
while (p < end) {
|
|
e = (struct ivhd_entry *)p;
|
|
switch (e->type) {
|
|
case IVHD_DEV_ALL:
|
|
|
|
DUMP_printk(" DEV_ALL\t\t\tflags: %02x\n", e->flags);
|
|
|
|
for (dev_i = 0; dev_i <= amd_iommu_last_bdf; ++dev_i)
|
|
set_dev_entry_from_acpi(iommu, dev_i, e->flags, 0);
|
|
break;
|
|
case IVHD_DEV_SELECT:
|
|
|
|
DUMP_printk(" DEV_SELECT\t\t\t devid: %02x:%02x.%x "
|
|
"flags: %02x\n",
|
|
PCI_BUS_NUM(e->devid),
|
|
PCI_SLOT(e->devid),
|
|
PCI_FUNC(e->devid),
|
|
e->flags);
|
|
|
|
devid = e->devid;
|
|
set_dev_entry_from_acpi(iommu, devid, e->flags, 0);
|
|
break;
|
|
case IVHD_DEV_SELECT_RANGE_START:
|
|
|
|
DUMP_printk(" DEV_SELECT_RANGE_START\t "
|
|
"devid: %02x:%02x.%x flags: %02x\n",
|
|
PCI_BUS_NUM(e->devid),
|
|
PCI_SLOT(e->devid),
|
|
PCI_FUNC(e->devid),
|
|
e->flags);
|
|
|
|
devid_start = e->devid;
|
|
flags = e->flags;
|
|
ext_flags = 0;
|
|
alias = false;
|
|
break;
|
|
case IVHD_DEV_ALIAS:
|
|
|
|
DUMP_printk(" DEV_ALIAS\t\t\t devid: %02x:%02x.%x "
|
|
"flags: %02x devid_to: %02x:%02x.%x\n",
|
|
PCI_BUS_NUM(e->devid),
|
|
PCI_SLOT(e->devid),
|
|
PCI_FUNC(e->devid),
|
|
e->flags,
|
|
PCI_BUS_NUM(e->ext >> 8),
|
|
PCI_SLOT(e->ext >> 8),
|
|
PCI_FUNC(e->ext >> 8));
|
|
|
|
devid = e->devid;
|
|
devid_to = e->ext >> 8;
|
|
set_dev_entry_from_acpi(iommu, devid , e->flags, 0);
|
|
set_dev_entry_from_acpi(iommu, devid_to, e->flags, 0);
|
|
amd_iommu_alias_table[devid] = devid_to;
|
|
break;
|
|
case IVHD_DEV_ALIAS_RANGE:
|
|
|
|
DUMP_printk(" DEV_ALIAS_RANGE\t\t "
|
|
"devid: %02x:%02x.%x flags: %02x "
|
|
"devid_to: %02x:%02x.%x\n",
|
|
PCI_BUS_NUM(e->devid),
|
|
PCI_SLOT(e->devid),
|
|
PCI_FUNC(e->devid),
|
|
e->flags,
|
|
PCI_BUS_NUM(e->ext >> 8),
|
|
PCI_SLOT(e->ext >> 8),
|
|
PCI_FUNC(e->ext >> 8));
|
|
|
|
devid_start = e->devid;
|
|
flags = e->flags;
|
|
devid_to = e->ext >> 8;
|
|
ext_flags = 0;
|
|
alias = true;
|
|
break;
|
|
case IVHD_DEV_EXT_SELECT:
|
|
|
|
DUMP_printk(" DEV_EXT_SELECT\t\t devid: %02x:%02x.%x "
|
|
"flags: %02x ext: %08x\n",
|
|
PCI_BUS_NUM(e->devid),
|
|
PCI_SLOT(e->devid),
|
|
PCI_FUNC(e->devid),
|
|
e->flags, e->ext);
|
|
|
|
devid = e->devid;
|
|
set_dev_entry_from_acpi(iommu, devid, e->flags,
|
|
e->ext);
|
|
break;
|
|
case IVHD_DEV_EXT_SELECT_RANGE:
|
|
|
|
DUMP_printk(" DEV_EXT_SELECT_RANGE\t devid: "
|
|
"%02x:%02x.%x flags: %02x ext: %08x\n",
|
|
PCI_BUS_NUM(e->devid),
|
|
PCI_SLOT(e->devid),
|
|
PCI_FUNC(e->devid),
|
|
e->flags, e->ext);
|
|
|
|
devid_start = e->devid;
|
|
flags = e->flags;
|
|
ext_flags = e->ext;
|
|
alias = false;
|
|
break;
|
|
case IVHD_DEV_RANGE_END:
|
|
|
|
DUMP_printk(" DEV_RANGE_END\t\t devid: %02x:%02x.%x\n",
|
|
PCI_BUS_NUM(e->devid),
|
|
PCI_SLOT(e->devid),
|
|
PCI_FUNC(e->devid));
|
|
|
|
devid = e->devid;
|
|
for (dev_i = devid_start; dev_i <= devid; ++dev_i) {
|
|
if (alias) {
|
|
amd_iommu_alias_table[dev_i] = devid_to;
|
|
set_dev_entry_from_acpi(iommu,
|
|
devid_to, flags, ext_flags);
|
|
}
|
|
set_dev_entry_from_acpi(iommu, dev_i,
|
|
flags, ext_flags);
|
|
}
|
|
break;
|
|
case IVHD_DEV_SPECIAL: {
|
|
u8 handle, type;
|
|
const char *var;
|
|
u16 devid;
|
|
int ret;
|
|
|
|
handle = e->ext & 0xff;
|
|
devid = (e->ext >> 8) & 0xffff;
|
|
type = (e->ext >> 24) & 0xff;
|
|
|
|
if (type == IVHD_SPECIAL_IOAPIC)
|
|
var = "IOAPIC";
|
|
else if (type == IVHD_SPECIAL_HPET)
|
|
var = "HPET";
|
|
else
|
|
var = "UNKNOWN";
|
|
|
|
DUMP_printk(" DEV_SPECIAL(%s[%d])\t\tdevid: %02x:%02x.%x\n",
|
|
var, (int)handle,
|
|
PCI_BUS_NUM(devid),
|
|
PCI_SLOT(devid),
|
|
PCI_FUNC(devid));
|
|
|
|
ret = add_special_device(type, handle, &devid, false);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* add_special_device might update the devid in case a
|
|
* command-line override is present. So call
|
|
* set_dev_entry_from_acpi after add_special_device.
|
|
*/
|
|
set_dev_entry_from_acpi(iommu, devid, e->flags, 0);
|
|
|
|
break;
|
|
}
|
|
case IVHD_DEV_ACPI_HID: {
|
|
u16 devid;
|
|
u8 hid[ACPIHID_HID_LEN] = {0};
|
|
u8 uid[ACPIHID_UID_LEN] = {0};
|
|
int ret;
|
|
|
|
if (h->type != 0x40) {
|
|
pr_err(FW_BUG "Invalid IVHD device type %#x\n",
|
|
e->type);
|
|
break;
|
|
}
|
|
|
|
memcpy(hid, (u8 *)(&e->ext), ACPIHID_HID_LEN - 1);
|
|
hid[ACPIHID_HID_LEN - 1] = '\0';
|
|
|
|
if (!(*hid)) {
|
|
pr_err(FW_BUG "Invalid HID.\n");
|
|
break;
|
|
}
|
|
|
|
switch (e->uidf) {
|
|
case UID_NOT_PRESENT:
|
|
|
|
if (e->uidl != 0)
|
|
pr_warn(FW_BUG "Invalid UID length.\n");
|
|
|
|
break;
|
|
case UID_IS_INTEGER:
|
|
|
|
sprintf(uid, "%d", e->uid);
|
|
|
|
break;
|
|
case UID_IS_CHARACTER:
|
|
|
|
memcpy(uid, (u8 *)(&e->uid), ACPIHID_UID_LEN - 1);
|
|
uid[ACPIHID_UID_LEN - 1] = '\0';
|
|
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
devid = e->devid;
|
|
DUMP_printk(" DEV_ACPI_HID(%s[%s])\t\tdevid: %02x:%02x.%x\n",
|
|
hid, uid,
|
|
PCI_BUS_NUM(devid),
|
|
PCI_SLOT(devid),
|
|
PCI_FUNC(devid));
|
|
|
|
flags = e->flags;
|
|
|
|
ret = add_acpi_hid_device(hid, uid, &devid, false);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* add_special_device might update the devid in case a
|
|
* command-line override is present. So call
|
|
* set_dev_entry_from_acpi after add_special_device.
|
|
*/
|
|
set_dev_entry_from_acpi(iommu, devid, e->flags, 0);
|
|
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
p += ivhd_entry_length(p);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __init free_iommu_one(struct amd_iommu *iommu)
|
|
{
|
|
free_command_buffer(iommu);
|
|
free_event_buffer(iommu);
|
|
free_ppr_log(iommu);
|
|
free_ga_log(iommu);
|
|
iommu_unmap_mmio_space(iommu);
|
|
}
|
|
|
|
static void __init free_iommu_all(void)
|
|
{
|
|
struct amd_iommu *iommu, *next;
|
|
|
|
for_each_iommu_safe(iommu, next) {
|
|
list_del(&iommu->list);
|
|
free_iommu_one(iommu);
|
|
kfree(iommu);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Family15h Model 10h-1fh erratum 746 (IOMMU Logging May Stall Translations)
|
|
* Workaround:
|
|
* BIOS should disable L2B micellaneous clock gating by setting
|
|
* L2_L2B_CK_GATE_CONTROL[CKGateL2BMiscDisable](D0F2xF4_x90[2]) = 1b
|
|
*/
|
|
static void amd_iommu_erratum_746_workaround(struct amd_iommu *iommu)
|
|
{
|
|
u32 value;
|
|
|
|
if ((boot_cpu_data.x86 != 0x15) ||
|
|
(boot_cpu_data.x86_model < 0x10) ||
|
|
(boot_cpu_data.x86_model > 0x1f))
|
|
return;
|
|
|
|
pci_write_config_dword(iommu->dev, 0xf0, 0x90);
|
|
pci_read_config_dword(iommu->dev, 0xf4, &value);
|
|
|
|
if (value & BIT(2))
|
|
return;
|
|
|
|
/* Select NB indirect register 0x90 and enable writing */
|
|
pci_write_config_dword(iommu->dev, 0xf0, 0x90 | (1 << 8));
|
|
|
|
pci_write_config_dword(iommu->dev, 0xf4, value | 0x4);
|
|
pr_info("AMD-Vi: Applying erratum 746 workaround for IOMMU at %s\n",
|
|
dev_name(&iommu->dev->dev));
|
|
|
|
/* Clear the enable writing bit */
|
|
pci_write_config_dword(iommu->dev, 0xf0, 0x90);
|
|
}
|
|
|
|
/*
|
|
* Family15h Model 30h-3fh (IOMMU Mishandles ATS Write Permission)
|
|
* Workaround:
|
|
* BIOS should enable ATS write permission check by setting
|
|
* L2_DEBUG_3[AtsIgnoreIWDis](D0F2xF4_x47[0]) = 1b
|
|
*/
|
|
static void amd_iommu_ats_write_check_workaround(struct amd_iommu *iommu)
|
|
{
|
|
u32 value;
|
|
|
|
if ((boot_cpu_data.x86 != 0x15) ||
|
|
(boot_cpu_data.x86_model < 0x30) ||
|
|
(boot_cpu_data.x86_model > 0x3f))
|
|
return;
|
|
|
|
/* Test L2_DEBUG_3[AtsIgnoreIWDis] == 1 */
|
|
value = iommu_read_l2(iommu, 0x47);
|
|
|
|
if (value & BIT(0))
|
|
return;
|
|
|
|
/* Set L2_DEBUG_3[AtsIgnoreIWDis] = 1 */
|
|
iommu_write_l2(iommu, 0x47, value | BIT(0));
|
|
|
|
pr_info("AMD-Vi: Applying ATS write check workaround for IOMMU at %s\n",
|
|
dev_name(&iommu->dev->dev));
|
|
}
|
|
|
|
/*
|
|
* This function clues the initialization function for one 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)
|
|
{
|
|
int ret;
|
|
|
|
raw_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
|
|
*/
|
|
iommu->devid = h->devid;
|
|
iommu->cap_ptr = h->cap_ptr;
|
|
iommu->pci_seg = h->pci_seg;
|
|
iommu->mmio_phys = h->mmio_phys;
|
|
|
|
switch (h->type) {
|
|
case 0x10:
|
|
/* Check if IVHD EFR contains proper max banks/counters */
|
|
if ((h->efr_attr != 0) &&
|
|
((h->efr_attr & (0xF << 13)) != 0) &&
|
|
((h->efr_attr & (0x3F << 17)) != 0))
|
|
iommu->mmio_phys_end = MMIO_REG_END_OFFSET;
|
|
else
|
|
iommu->mmio_phys_end = MMIO_CNTR_CONF_OFFSET;
|
|
if (((h->efr_attr & (0x1 << IOMMU_FEAT_GASUP_SHIFT)) == 0))
|
|
amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY;
|
|
break;
|
|
case 0x11:
|
|
case 0x40:
|
|
if (h->efr_reg & (1 << 9))
|
|
iommu->mmio_phys_end = MMIO_REG_END_OFFSET;
|
|
else
|
|
iommu->mmio_phys_end = MMIO_CNTR_CONF_OFFSET;
|
|
if (((h->efr_reg & (0x1 << IOMMU_EFR_GASUP_SHIFT)) == 0))
|
|
amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
iommu->mmio_base = iommu_map_mmio_space(iommu->mmio_phys,
|
|
iommu->mmio_phys_end);
|
|
if (!iommu->mmio_base)
|
|
return -ENOMEM;
|
|
|
|
if (alloc_command_buffer(iommu))
|
|
return -ENOMEM;
|
|
|
|
if (alloc_event_buffer(iommu))
|
|
return -ENOMEM;
|
|
|
|
iommu->int_enabled = false;
|
|
|
|
init_translation_status(iommu);
|
|
if (translation_pre_enabled(iommu) && !is_kdump_kernel()) {
|
|
iommu_disable(iommu);
|
|
clear_translation_pre_enabled(iommu);
|
|
pr_warn("Translation was enabled for IOMMU:%d but we are not in kdump mode\n",
|
|
iommu->index);
|
|
}
|
|
if (amd_iommu_pre_enabled)
|
|
amd_iommu_pre_enabled = translation_pre_enabled(iommu);
|
|
|
|
ret = init_iommu_from_acpi(iommu, h);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = amd_iommu_create_irq_domain(iommu);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* Make sure IOMMU is not considered to translate itself. The IVRS
|
|
* table tells us so, but this is a lie!
|
|
*/
|
|
amd_iommu_rlookup_table[iommu->devid] = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* get_highest_supported_ivhd_type - Look up the appropriate IVHD type
|
|
* @ivrs Pointer to the IVRS header
|
|
*
|
|
* This function search through all IVDB of the maximum supported IVHD
|
|
*/
|
|
static u8 get_highest_supported_ivhd_type(struct acpi_table_header *ivrs)
|
|
{
|
|
u8 *base = (u8 *)ivrs;
|
|
struct ivhd_header *ivhd = (struct ivhd_header *)
|
|
(base + IVRS_HEADER_LENGTH);
|
|
u8 last_type = ivhd->type;
|
|
u16 devid = ivhd->devid;
|
|
|
|
while (((u8 *)ivhd - base < ivrs->length) &&
|
|
(ivhd->type <= ACPI_IVHD_TYPE_MAX_SUPPORTED)) {
|
|
u8 *p = (u8 *) ivhd;
|
|
|
|
if (ivhd->devid == devid)
|
|
last_type = ivhd->type;
|
|
ivhd = (struct ivhd_header *)(p + ivhd->length);
|
|
}
|
|
|
|
return last_type;
|
|
}
|
|
|
|
/*
|
|
* Iterates over all IOMMU entries in the ACPI table, allocates the
|
|
* IOMMU structure and initializes it with init_iommu_one()
|
|
*/
|
|
static int __init init_iommu_all(struct acpi_table_header *table)
|
|
{
|
|
u8 *p = (u8 *)table, *end = (u8 *)table;
|
|
struct ivhd_header *h;
|
|
struct amd_iommu *iommu;
|
|
int ret;
|
|
|
|
end += table->length;
|
|
p += IVRS_HEADER_LENGTH;
|
|
|
|
while (p < end) {
|
|
h = (struct ivhd_header *)p;
|
|
if (*p == amd_iommu_target_ivhd_type) {
|
|
|
|
DUMP_printk("device: %02x:%02x.%01x cap: %04x "
|
|
"seg: %d flags: %01x info %04x\n",
|
|
PCI_BUS_NUM(h->devid), PCI_SLOT(h->devid),
|
|
PCI_FUNC(h->devid), h->cap_ptr,
|
|
h->pci_seg, h->flags, h->info);
|
|
DUMP_printk(" mmio-addr: %016llx\n",
|
|
h->mmio_phys);
|
|
|
|
iommu = kzalloc(sizeof(struct amd_iommu), GFP_KERNEL);
|
|
if (iommu == NULL)
|
|
return -ENOMEM;
|
|
|
|
ret = init_iommu_one(iommu, h);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
p += h->length;
|
|
|
|
}
|
|
WARN_ON(p != end);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int iommu_pc_get_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
|
|
u8 fxn, u64 *value, bool is_write);
|
|
|
|
static void init_iommu_perf_ctr(struct amd_iommu *iommu)
|
|
{
|
|
u64 val = 0xabcd, val2 = 0;
|
|
|
|
if (!iommu_feature(iommu, FEATURE_PC))
|
|
return;
|
|
|
|
amd_iommu_pc_present = true;
|
|
|
|
/* Check if the performance counters can be written to */
|
|
if ((iommu_pc_get_set_reg(iommu, 0, 0, 0, &val, true)) ||
|
|
(iommu_pc_get_set_reg(iommu, 0, 0, 0, &val2, false)) ||
|
|
(val != val2)) {
|
|
pr_err("AMD-Vi: Unable to write to IOMMU perf counter.\n");
|
|
amd_iommu_pc_present = false;
|
|
return;
|
|
}
|
|
|
|
pr_info("AMD-Vi: IOMMU performance counters supported\n");
|
|
|
|
val = readl(iommu->mmio_base + MMIO_CNTR_CONF_OFFSET);
|
|
iommu->max_banks = (u8) ((val >> 12) & 0x3f);
|
|
iommu->max_counters = (u8) ((val >> 7) & 0xf);
|
|
}
|
|
|
|
static ssize_t amd_iommu_show_cap(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct amd_iommu *iommu = dev_to_amd_iommu(dev);
|
|
return sprintf(buf, "%x\n", iommu->cap);
|
|
}
|
|
static DEVICE_ATTR(cap, S_IRUGO, amd_iommu_show_cap, NULL);
|
|
|
|
static ssize_t amd_iommu_show_features(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct amd_iommu *iommu = dev_to_amd_iommu(dev);
|
|
return sprintf(buf, "%llx\n", iommu->features);
|
|
}
|
|
static DEVICE_ATTR(features, S_IRUGO, amd_iommu_show_features, NULL);
|
|
|
|
static struct attribute *amd_iommu_attrs[] = {
|
|
&dev_attr_cap.attr,
|
|
&dev_attr_features.attr,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute_group amd_iommu_group = {
|
|
.name = "amd-iommu",
|
|
.attrs = amd_iommu_attrs,
|
|
};
|
|
|
|
static const struct attribute_group *amd_iommu_groups[] = {
|
|
&amd_iommu_group,
|
|
NULL,
|
|
};
|
|
|
|
static int iommu_init_pci(struct amd_iommu *iommu)
|
|
{
|
|
int cap_ptr = iommu->cap_ptr;
|
|
u32 range, misc, low, high;
|
|
int ret;
|
|
|
|
iommu->dev = pci_get_domain_bus_and_slot(0, PCI_BUS_NUM(iommu->devid),
|
|
iommu->devid & 0xff);
|
|
if (!iommu->dev)
|
|
return -ENODEV;
|
|
|
|
/* Prevent binding other PCI device drivers to IOMMU devices */
|
|
iommu->dev->match_driver = false;
|
|
|
|
pci_read_config_dword(iommu->dev, cap_ptr + MMIO_CAP_HDR_OFFSET,
|
|
&iommu->cap);
|
|
pci_read_config_dword(iommu->dev, cap_ptr + MMIO_RANGE_OFFSET,
|
|
&range);
|
|
pci_read_config_dword(iommu->dev, cap_ptr + MMIO_MISC_OFFSET,
|
|
&misc);
|
|
|
|
if (!(iommu->cap & (1 << IOMMU_CAP_IOTLB)))
|
|
amd_iommu_iotlb_sup = false;
|
|
|
|
/* read extended feature bits */
|
|
low = readl(iommu->mmio_base + MMIO_EXT_FEATURES);
|
|
high = readl(iommu->mmio_base + MMIO_EXT_FEATURES + 4);
|
|
|
|
iommu->features = ((u64)high << 32) | low;
|
|
|
|
if (iommu_feature(iommu, FEATURE_GT)) {
|
|
int glxval;
|
|
u32 max_pasid;
|
|
u64 pasmax;
|
|
|
|
pasmax = iommu->features & FEATURE_PASID_MASK;
|
|
pasmax >>= FEATURE_PASID_SHIFT;
|
|
max_pasid = (1 << (pasmax + 1)) - 1;
|
|
|
|
amd_iommu_max_pasid = min(amd_iommu_max_pasid, max_pasid);
|
|
|
|
BUG_ON(amd_iommu_max_pasid & ~PASID_MASK);
|
|
|
|
glxval = iommu->features & FEATURE_GLXVAL_MASK;
|
|
glxval >>= FEATURE_GLXVAL_SHIFT;
|
|
|
|
if (amd_iommu_max_glx_val == -1)
|
|
amd_iommu_max_glx_val = glxval;
|
|
else
|
|
amd_iommu_max_glx_val = min(amd_iommu_max_glx_val, glxval);
|
|
}
|
|
|
|
if (iommu_feature(iommu, FEATURE_GT) &&
|
|
iommu_feature(iommu, FEATURE_PPR)) {
|
|
iommu->is_iommu_v2 = true;
|
|
amd_iommu_v2_present = true;
|
|
}
|
|
|
|
if (iommu_feature(iommu, FEATURE_PPR) && alloc_ppr_log(iommu))
|
|
return -ENOMEM;
|
|
|
|
ret = iommu_init_ga(iommu);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (iommu->cap & (1UL << IOMMU_CAP_NPCACHE))
|
|
amd_iommu_np_cache = true;
|
|
|
|
init_iommu_perf_ctr(iommu);
|
|
|
|
if (is_rd890_iommu(iommu->dev)) {
|
|
int i, j;
|
|
|
|
iommu->root_pdev =
|
|
pci_get_domain_bus_and_slot(0, iommu->dev->bus->number,
|
|
PCI_DEVFN(0, 0));
|
|
|
|
/*
|
|
* Some rd890 systems may not be fully reconfigured by the
|
|
* BIOS, so it's necessary for us to store this information so
|
|
* it can be reprogrammed on resume
|
|
*/
|
|
pci_read_config_dword(iommu->dev, iommu->cap_ptr + 4,
|
|
&iommu->stored_addr_lo);
|
|
pci_read_config_dword(iommu->dev, iommu->cap_ptr + 8,
|
|
&iommu->stored_addr_hi);
|
|
|
|
/* Low bit locks writes to configuration space */
|
|
iommu->stored_addr_lo &= ~1;
|
|
|
|
for (i = 0; i < 6; i++)
|
|
for (j = 0; j < 0x12; j++)
|
|
iommu->stored_l1[i][j] = iommu_read_l1(iommu, i, j);
|
|
|
|
for (i = 0; i < 0x83; i++)
|
|
iommu->stored_l2[i] = iommu_read_l2(iommu, i);
|
|
}
|
|
|
|
amd_iommu_erratum_746_workaround(iommu);
|
|
amd_iommu_ats_write_check_workaround(iommu);
|
|
|
|
iommu_device_sysfs_add(&iommu->iommu, &iommu->dev->dev,
|
|
amd_iommu_groups, "ivhd%d", iommu->index);
|
|
iommu_device_set_ops(&iommu->iommu, &amd_iommu_ops);
|
|
iommu_device_register(&iommu->iommu);
|
|
|
|
return pci_enable_device(iommu->dev);
|
|
}
|
|
|
|
static void print_iommu_info(void)
|
|
{
|
|
static const char * const feat_str[] = {
|
|
"PreF", "PPR", "X2APIC", "NX", "GT", "[5]",
|
|
"IA", "GA", "HE", "PC"
|
|
};
|
|
struct amd_iommu *iommu;
|
|
|
|
for_each_iommu(iommu) {
|
|
int i;
|
|
|
|
pr_info("AMD-Vi: Found IOMMU at %s cap 0x%hx\n",
|
|
dev_name(&iommu->dev->dev), iommu->cap_ptr);
|
|
|
|
if (iommu->cap & (1 << IOMMU_CAP_EFR)) {
|
|
pr_info("AMD-Vi: Extended features (%#llx):\n",
|
|
iommu->features);
|
|
for (i = 0; i < ARRAY_SIZE(feat_str); ++i) {
|
|
if (iommu_feature(iommu, (1ULL << i)))
|
|
pr_cont(" %s", feat_str[i]);
|
|
}
|
|
|
|
if (iommu->features & FEATURE_GAM_VAPIC)
|
|
pr_cont(" GA_vAPIC");
|
|
|
|
pr_cont("\n");
|
|
}
|
|
}
|
|
if (irq_remapping_enabled) {
|
|
pr_info("AMD-Vi: Interrupt remapping enabled\n");
|
|
if (AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir))
|
|
pr_info("AMD-Vi: virtual APIC enabled\n");
|
|
}
|
|
}
|
|
|
|
static int __init amd_iommu_init_pci(void)
|
|
{
|
|
struct amd_iommu *iommu;
|
|
int ret = 0;
|
|
|
|
for_each_iommu(iommu) {
|
|
ret = iommu_init_pci(iommu);
|
|
if (ret)
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Order is important here to make sure any unity map requirements are
|
|
* fulfilled. The unity mappings are created and written to the device
|
|
* table during the amd_iommu_init_api() call.
|
|
*
|
|
* After that we call init_device_table_dma() to make sure any
|
|
* uninitialized DTE will block DMA, and in the end we flush the caches
|
|
* of all IOMMUs to make sure the changes to the device table are
|
|
* active.
|
|
*/
|
|
ret = amd_iommu_init_api();
|
|
|
|
init_device_table_dma();
|
|
|
|
for_each_iommu(iommu)
|
|
iommu_flush_all_caches(iommu);
|
|
|
|
if (!ret)
|
|
print_iommu_info();
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* The following functions initialize the MSI interrupts for all IOMMUs
|
|
* in the system. It's a bit challenging because there could be multiple
|
|
* IOMMUs per PCI BDF but we can call pci_enable_msi(x) only once per
|
|
* pci_dev.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int iommu_setup_msi(struct amd_iommu *iommu)
|
|
{
|
|
int r;
|
|
|
|
r = pci_enable_msi(iommu->dev);
|
|
if (r)
|
|
return r;
|
|
|
|
r = request_threaded_irq(iommu->dev->irq,
|
|
amd_iommu_int_handler,
|
|
amd_iommu_int_thread,
|
|
0, "AMD-Vi",
|
|
iommu);
|
|
|
|
if (r) {
|
|
pci_disable_msi(iommu->dev);
|
|
return r;
|
|
}
|
|
|
|
iommu->int_enabled = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int iommu_init_msi(struct amd_iommu *iommu)
|
|
{
|
|
int ret;
|
|
|
|
if (iommu->int_enabled)
|
|
goto enable_faults;
|
|
|
|
if (iommu->dev->msi_cap)
|
|
ret = iommu_setup_msi(iommu);
|
|
else
|
|
ret = -ENODEV;
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
enable_faults:
|
|
iommu_feature_enable(iommu, CONTROL_EVT_INT_EN);
|
|
|
|
if (iommu->ppr_log != NULL)
|
|
iommu_feature_enable(iommu, CONTROL_PPFINT_EN);
|
|
|
|
iommu_ga_log_enable(iommu);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* The next functions belong to the third pass of parsing the ACPI
|
|
* table. In this last pass the memory mapping requirements are
|
|
* gathered (like exclusion and unity mapping ranges).
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void __init free_unity_maps(void)
|
|
{
|
|
struct unity_map_entry *entry, *next;
|
|
|
|
list_for_each_entry_safe(entry, next, &amd_iommu_unity_map, list) {
|
|
list_del(&entry->list);
|
|
kfree(entry);
|
|
}
|
|
}
|
|
|
|
/* called when we find an exclusion range definition in ACPI */
|
|
static int __init init_exclusion_range(struct ivmd_header *m)
|
|
{
|
|
int i;
|
|
|
|
switch (m->type) {
|
|
case ACPI_IVMD_TYPE:
|
|
set_device_exclusion_range(m->devid, m);
|
|
break;
|
|
case ACPI_IVMD_TYPE_ALL:
|
|
for (i = 0; i <= amd_iommu_last_bdf; ++i)
|
|
set_device_exclusion_range(i, m);
|
|
break;
|
|
case ACPI_IVMD_TYPE_RANGE:
|
|
for (i = m->devid; i <= m->aux; ++i)
|
|
set_device_exclusion_range(i, m);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* called for unity map ACPI definition */
|
|
static int __init init_unity_map_range(struct ivmd_header *m)
|
|
{
|
|
struct unity_map_entry *e = NULL;
|
|
char *s;
|
|
|
|
e = kzalloc(sizeof(*e), GFP_KERNEL);
|
|
if (e == NULL)
|
|
return -ENOMEM;
|
|
|
|
switch (m->type) {
|
|
default:
|
|
kfree(e);
|
|
return 0;
|
|
case ACPI_IVMD_TYPE:
|
|
s = "IVMD_TYPEi\t\t\t";
|
|
e->devid_start = e->devid_end = m->devid;
|
|
break;
|
|
case ACPI_IVMD_TYPE_ALL:
|
|
s = "IVMD_TYPE_ALL\t\t";
|
|
e->devid_start = 0;
|
|
e->devid_end = amd_iommu_last_bdf;
|
|
break;
|
|
case ACPI_IVMD_TYPE_RANGE:
|
|
s = "IVMD_TYPE_RANGE\t\t";
|
|
e->devid_start = m->devid;
|
|
e->devid_end = m->aux;
|
|
break;
|
|
}
|
|
e->address_start = PAGE_ALIGN(m->range_start);
|
|
e->address_end = e->address_start + PAGE_ALIGN(m->range_length);
|
|
e->prot = m->flags >> 1;
|
|
|
|
DUMP_printk("%s devid_start: %02x:%02x.%x devid_end: %02x:%02x.%x"
|
|
" range_start: %016llx range_end: %016llx flags: %x\n", s,
|
|
PCI_BUS_NUM(e->devid_start), PCI_SLOT(e->devid_start),
|
|
PCI_FUNC(e->devid_start), PCI_BUS_NUM(e->devid_end),
|
|
PCI_SLOT(e->devid_end), PCI_FUNC(e->devid_end),
|
|
e->address_start, e->address_end, m->flags);
|
|
|
|
list_add_tail(&e->list, &amd_iommu_unity_map);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* iterates over all memory definitions we find in the ACPI table */
|
|
static int __init init_memory_definitions(struct acpi_table_header *table)
|
|
{
|
|
u8 *p = (u8 *)table, *end = (u8 *)table;
|
|
struct ivmd_header *m;
|
|
|
|
end += table->length;
|
|
p += IVRS_HEADER_LENGTH;
|
|
|
|
while (p < end) {
|
|
m = (struct ivmd_header *)p;
|
|
if (m->flags & IVMD_FLAG_EXCL_RANGE)
|
|
init_exclusion_range(m);
|
|
else if (m->flags & IVMD_FLAG_UNITY_MAP)
|
|
init_unity_map_range(m);
|
|
|
|
p += m->length;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Init the device table to not allow DMA access for devices
|
|
*/
|
|
static void init_device_table_dma(void)
|
|
{
|
|
u32 devid;
|
|
|
|
for (devid = 0; devid <= amd_iommu_last_bdf; ++devid) {
|
|
set_dev_entry_bit(devid, DEV_ENTRY_VALID);
|
|
set_dev_entry_bit(devid, DEV_ENTRY_TRANSLATION);
|
|
}
|
|
}
|
|
|
|
static void __init uninit_device_table_dma(void)
|
|
{
|
|
u32 devid;
|
|
|
|
for (devid = 0; devid <= amd_iommu_last_bdf; ++devid) {
|
|
amd_iommu_dev_table[devid].data[0] = 0ULL;
|
|
amd_iommu_dev_table[devid].data[1] = 0ULL;
|
|
}
|
|
}
|
|
|
|
static void init_device_table(void)
|
|
{
|
|
u32 devid;
|
|
|
|
if (!amd_iommu_irq_remap)
|
|
return;
|
|
|
|
for (devid = 0; devid <= amd_iommu_last_bdf; ++devid)
|
|
set_dev_entry_bit(devid, DEV_ENTRY_IRQ_TBL_EN);
|
|
}
|
|
|
|
static void iommu_init_flags(struct amd_iommu *iommu)
|
|
{
|
|
iommu->acpi_flags & IVHD_FLAG_HT_TUN_EN_MASK ?
|
|
iommu_feature_enable(iommu, CONTROL_HT_TUN_EN) :
|
|
iommu_feature_disable(iommu, CONTROL_HT_TUN_EN);
|
|
|
|
iommu->acpi_flags & IVHD_FLAG_PASSPW_EN_MASK ?
|
|
iommu_feature_enable(iommu, CONTROL_PASSPW_EN) :
|
|
iommu_feature_disable(iommu, CONTROL_PASSPW_EN);
|
|
|
|
iommu->acpi_flags & IVHD_FLAG_RESPASSPW_EN_MASK ?
|
|
iommu_feature_enable(iommu, CONTROL_RESPASSPW_EN) :
|
|
iommu_feature_disable(iommu, CONTROL_RESPASSPW_EN);
|
|
|
|
iommu->acpi_flags & IVHD_FLAG_ISOC_EN_MASK ?
|
|
iommu_feature_enable(iommu, CONTROL_ISOC_EN) :
|
|
iommu_feature_disable(iommu, CONTROL_ISOC_EN);
|
|
|
|
/*
|
|
* make IOMMU memory accesses cache coherent
|
|
*/
|
|
iommu_feature_enable(iommu, CONTROL_COHERENT_EN);
|
|
|
|
/* Set IOTLB invalidation timeout to 1s */
|
|
iommu_set_inv_tlb_timeout(iommu, CTRL_INV_TO_1S);
|
|
}
|
|
|
|
static void iommu_apply_resume_quirks(struct amd_iommu *iommu)
|
|
{
|
|
int i, j;
|
|
u32 ioc_feature_control;
|
|
struct pci_dev *pdev = iommu->root_pdev;
|
|
|
|
/* RD890 BIOSes may not have completely reconfigured the iommu */
|
|
if (!is_rd890_iommu(iommu->dev) || !pdev)
|
|
return;
|
|
|
|
/*
|
|
* First, we need to ensure that the iommu is enabled. This is
|
|
* controlled by a register in the northbridge
|
|
*/
|
|
|
|
/* Select Northbridge indirect register 0x75 and enable writing */
|
|
pci_write_config_dword(pdev, 0x60, 0x75 | (1 << 7));
|
|
pci_read_config_dword(pdev, 0x64, &ioc_feature_control);
|
|
|
|
/* Enable the iommu */
|
|
if (!(ioc_feature_control & 0x1))
|
|
pci_write_config_dword(pdev, 0x64, ioc_feature_control | 1);
|
|
|
|
/* Restore the iommu BAR */
|
|
pci_write_config_dword(iommu->dev, iommu->cap_ptr + 4,
|
|
iommu->stored_addr_lo);
|
|
pci_write_config_dword(iommu->dev, iommu->cap_ptr + 8,
|
|
iommu->stored_addr_hi);
|
|
|
|
/* Restore the l1 indirect regs for each of the 6 l1s */
|
|
for (i = 0; i < 6; i++)
|
|
for (j = 0; j < 0x12; j++)
|
|
iommu_write_l1(iommu, i, j, iommu->stored_l1[i][j]);
|
|
|
|
/* Restore the l2 indirect regs */
|
|
for (i = 0; i < 0x83; i++)
|
|
iommu_write_l2(iommu, i, iommu->stored_l2[i]);
|
|
|
|
/* Lock PCI setup registers */
|
|
pci_write_config_dword(iommu->dev, iommu->cap_ptr + 4,
|
|
iommu->stored_addr_lo | 1);
|
|
}
|
|
|
|
static void iommu_enable_ga(struct amd_iommu *iommu)
|
|
{
|
|
#ifdef CONFIG_IRQ_REMAP
|
|
switch (amd_iommu_guest_ir) {
|
|
case AMD_IOMMU_GUEST_IR_VAPIC:
|
|
iommu_feature_enable(iommu, CONTROL_GAM_EN);
|
|
/* Fall through */
|
|
case AMD_IOMMU_GUEST_IR_LEGACY_GA:
|
|
iommu_feature_enable(iommu, CONTROL_GA_EN);
|
|
iommu->irte_ops = &irte_128_ops;
|
|
break;
|
|
default:
|
|
iommu->irte_ops = &irte_32_ops;
|
|
break;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void early_enable_iommu(struct amd_iommu *iommu)
|
|
{
|
|
iommu_disable(iommu);
|
|
iommu_init_flags(iommu);
|
|
iommu_set_device_table(iommu);
|
|
iommu_enable_command_buffer(iommu);
|
|
iommu_enable_event_buffer(iommu);
|
|
iommu_set_exclusion_range(iommu);
|
|
iommu_enable_ga(iommu);
|
|
iommu_enable(iommu);
|
|
iommu_flush_all_caches(iommu);
|
|
}
|
|
|
|
/*
|
|
* This function finally enables all IOMMUs found in the system after
|
|
* they have been initialized.
|
|
*
|
|
* Or if in kdump kernel and IOMMUs are all pre-enabled, try to copy
|
|
* the old content of device table entries. Not this case or copy failed,
|
|
* just continue as normal kernel does.
|
|
*/
|
|
static void early_enable_iommus(void)
|
|
{
|
|
struct amd_iommu *iommu;
|
|
|
|
|
|
if (!copy_device_table()) {
|
|
/*
|
|
* If come here because of failure in copying device table from old
|
|
* kernel with all IOMMUs enabled, print error message and try to
|
|
* free allocated old_dev_tbl_cpy.
|
|
*/
|
|
if (amd_iommu_pre_enabled)
|
|
pr_err("Failed to copy DEV table from previous kernel.\n");
|
|
if (old_dev_tbl_cpy != NULL)
|
|
free_pages((unsigned long)old_dev_tbl_cpy,
|
|
get_order(dev_table_size));
|
|
|
|
for_each_iommu(iommu) {
|
|
clear_translation_pre_enabled(iommu);
|
|
early_enable_iommu(iommu);
|
|
}
|
|
} else {
|
|
pr_info("Copied DEV table from previous kernel.\n");
|
|
free_pages((unsigned long)amd_iommu_dev_table,
|
|
get_order(dev_table_size));
|
|
amd_iommu_dev_table = old_dev_tbl_cpy;
|
|
for_each_iommu(iommu) {
|
|
iommu_disable_command_buffer(iommu);
|
|
iommu_disable_event_buffer(iommu);
|
|
iommu_enable_command_buffer(iommu);
|
|
iommu_enable_event_buffer(iommu);
|
|
iommu_enable_ga(iommu);
|
|
iommu_set_device_table(iommu);
|
|
iommu_flush_all_caches(iommu);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_IRQ_REMAP
|
|
if (AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir))
|
|
amd_iommu_irq_ops.capability |= (1 << IRQ_POSTING_CAP);
|
|
#endif
|
|
}
|
|
|
|
static void enable_iommus_v2(void)
|
|
{
|
|
struct amd_iommu *iommu;
|
|
|
|
for_each_iommu(iommu) {
|
|
iommu_enable_ppr_log(iommu);
|
|
iommu_enable_gt(iommu);
|
|
}
|
|
}
|
|
|
|
static void enable_iommus(void)
|
|
{
|
|
early_enable_iommus();
|
|
|
|
enable_iommus_v2();
|
|
}
|
|
|
|
static void disable_iommus(void)
|
|
{
|
|
struct amd_iommu *iommu;
|
|
|
|
for_each_iommu(iommu)
|
|
iommu_disable(iommu);
|
|
|
|
#ifdef CONFIG_IRQ_REMAP
|
|
if (AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir))
|
|
amd_iommu_irq_ops.capability &= ~(1 << IRQ_POSTING_CAP);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Suspend/Resume support
|
|
* disable suspend until real resume implemented
|
|
*/
|
|
|
|
static void amd_iommu_resume(void)
|
|
{
|
|
struct amd_iommu *iommu;
|
|
|
|
for_each_iommu(iommu)
|
|
iommu_apply_resume_quirks(iommu);
|
|
|
|
/* re-load the hardware */
|
|
enable_iommus();
|
|
|
|
amd_iommu_enable_interrupts();
|
|
}
|
|
|
|
static int amd_iommu_suspend(void)
|
|
{
|
|
/* disable IOMMUs to go out of the way for BIOS */
|
|
disable_iommus();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct syscore_ops amd_iommu_syscore_ops = {
|
|
.suspend = amd_iommu_suspend,
|
|
.resume = amd_iommu_resume,
|
|
};
|
|
|
|
static void __init free_iommu_resources(void)
|
|
{
|
|
kmemleak_free(irq_lookup_table);
|
|
free_pages((unsigned long)irq_lookup_table,
|
|
get_order(rlookup_table_size));
|
|
irq_lookup_table = NULL;
|
|
|
|
kmem_cache_destroy(amd_iommu_irq_cache);
|
|
amd_iommu_irq_cache = NULL;
|
|
|
|
free_pages((unsigned long)amd_iommu_rlookup_table,
|
|
get_order(rlookup_table_size));
|
|
amd_iommu_rlookup_table = NULL;
|
|
|
|
free_pages((unsigned long)amd_iommu_alias_table,
|
|
get_order(alias_table_size));
|
|
amd_iommu_alias_table = NULL;
|
|
|
|
free_pages((unsigned long)amd_iommu_dev_table,
|
|
get_order(dev_table_size));
|
|
amd_iommu_dev_table = NULL;
|
|
|
|
free_iommu_all();
|
|
|
|
#ifdef CONFIG_GART_IOMMU
|
|
/*
|
|
* We failed to initialize the AMD IOMMU - try fallback to GART
|
|
* if possible.
|
|
*/
|
|
gart_iommu_init();
|
|
|
|
#endif
|
|
}
|
|
|
|
/* SB IOAPIC is always on this device in AMD systems */
|
|
#define IOAPIC_SB_DEVID ((0x00 << 8) | PCI_DEVFN(0x14, 0))
|
|
|
|
static bool __init check_ioapic_information(void)
|
|
{
|
|
const char *fw_bug = FW_BUG;
|
|
bool ret, has_sb_ioapic;
|
|
int idx;
|
|
|
|
has_sb_ioapic = false;
|
|
ret = false;
|
|
|
|
/*
|
|
* If we have map overrides on the kernel command line the
|
|
* messages in this function might not describe firmware bugs
|
|
* anymore - so be careful
|
|
*/
|
|
if (cmdline_maps)
|
|
fw_bug = "";
|
|
|
|
for (idx = 0; idx < nr_ioapics; idx++) {
|
|
int devid, id = mpc_ioapic_id(idx);
|
|
|
|
devid = get_ioapic_devid(id);
|
|
if (devid < 0) {
|
|
pr_err("%sAMD-Vi: IOAPIC[%d] not in IVRS table\n",
|
|
fw_bug, id);
|
|
ret = false;
|
|
} else if (devid == IOAPIC_SB_DEVID) {
|
|
has_sb_ioapic = true;
|
|
ret = true;
|
|
}
|
|
}
|
|
|
|
if (!has_sb_ioapic) {
|
|
/*
|
|
* We expect the SB IOAPIC to be listed in the IVRS
|
|
* table. The system timer is connected to the SB IOAPIC
|
|
* and if we don't have it in the list the system will
|
|
* panic at boot time. This situation usually happens
|
|
* when the BIOS is buggy and provides us the wrong
|
|
* device id for the IOAPIC in the system.
|
|
*/
|
|
pr_err("%sAMD-Vi: No southbridge IOAPIC found\n", fw_bug);
|
|
}
|
|
|
|
if (!ret)
|
|
pr_err("AMD-Vi: Disabling interrupt remapping\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __init free_dma_resources(void)
|
|
{
|
|
free_pages((unsigned long)amd_iommu_pd_alloc_bitmap,
|
|
get_order(MAX_DOMAIN_ID/8));
|
|
amd_iommu_pd_alloc_bitmap = NULL;
|
|
|
|
free_unity_maps();
|
|
}
|
|
|
|
/*
|
|
* This is the hardware init function for AMD IOMMU in the system.
|
|
* This function is called either from amd_iommu_init or from the interrupt
|
|
* remapping setup code.
|
|
*
|
|
* This function basically parses the ACPI table for AMD IOMMU (IVRS)
|
|
* four times:
|
|
*
|
|
* 1 pass) Discover the most comprehensive IVHD type to use.
|
|
*
|
|
* 2 pass) Find the highest PCI device id the driver has to handle.
|
|
* Upon this information the size of the data structures is
|
|
* determined that needs to be allocated.
|
|
*
|
|
* 3 pass) Initialize the data structures just allocated with the
|
|
* information in the ACPI table about available AMD IOMMUs
|
|
* in the system. It also maps the PCI devices in the
|
|
* system to specific IOMMUs
|
|
*
|
|
* 4 pass) After the basic data structures are allocated and
|
|
* initialized we update them with information about memory
|
|
* remapping requirements parsed out of the ACPI table in
|
|
* this last pass.
|
|
*
|
|
* After everything is set up the IOMMUs are enabled and the necessary
|
|
* hotplug and suspend notifiers are registered.
|
|
*/
|
|
static int __init early_amd_iommu_init(void)
|
|
{
|
|
struct acpi_table_header *ivrs_base;
|
|
acpi_status status;
|
|
int i, remap_cache_sz, ret = 0;
|
|
|
|
if (!amd_iommu_detected)
|
|
return -ENODEV;
|
|
|
|
status = acpi_get_table("IVRS", 0, &ivrs_base);
|
|
if (status == AE_NOT_FOUND)
|
|
return -ENODEV;
|
|
else if (ACPI_FAILURE(status)) {
|
|
const char *err = acpi_format_exception(status);
|
|
pr_err("AMD-Vi: IVRS table error: %s\n", err);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Validate checksum here so we don't need to do it when
|
|
* we actually parse the table
|
|
*/
|
|
ret = check_ivrs_checksum(ivrs_base);
|
|
if (ret)
|
|
goto out;
|
|
|
|
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);
|
|
|
|
/* Device table - directly used by all IOMMUs */
|
|
ret = -ENOMEM;
|
|
amd_iommu_dev_table = (void *)__get_free_pages(
|
|
GFP_KERNEL | __GFP_ZERO | GFP_DMA32,
|
|
get_order(dev_table_size));
|
|
if (amd_iommu_dev_table == NULL)
|
|
goto out;
|
|
|
|
/*
|
|
* Alias table - map PCI Bus/Dev/Func to Bus/Dev/Func the
|
|
* IOMMU see for that device
|
|
*/
|
|
amd_iommu_alias_table = (void *)__get_free_pages(GFP_KERNEL,
|
|
get_order(alias_table_size));
|
|
if (amd_iommu_alias_table == NULL)
|
|
goto out;
|
|
|
|
/* IOMMU rlookup table - find the IOMMU for a specific device */
|
|
amd_iommu_rlookup_table = (void *)__get_free_pages(
|
|
GFP_KERNEL | __GFP_ZERO,
|
|
get_order(rlookup_table_size));
|
|
if (amd_iommu_rlookup_table == NULL)
|
|
goto out;
|
|
|
|
amd_iommu_pd_alloc_bitmap = (void *)__get_free_pages(
|
|
GFP_KERNEL | __GFP_ZERO,
|
|
get_order(MAX_DOMAIN_ID/8));
|
|
if (amd_iommu_pd_alloc_bitmap == NULL)
|
|
goto out;
|
|
|
|
/*
|
|
* let all alias entries point to itself
|
|
*/
|
|
for (i = 0; i <= amd_iommu_last_bdf; ++i)
|
|
amd_iommu_alias_table[i] = i;
|
|
|
|
/*
|
|
* never allocate domain 0 because its used as the non-allocated and
|
|
* error value placeholder
|
|
*/
|
|
__set_bit(0, amd_iommu_pd_alloc_bitmap);
|
|
|
|
spin_lock_init(&amd_iommu_pd_lock);
|
|
|
|
/*
|
|
* now the data structures are allocated and basically initialized
|
|
* start the real acpi table scan
|
|
*/
|
|
ret = init_iommu_all(ivrs_base);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/* Disable any previously enabled IOMMUs */
|
|
if (!is_kdump_kernel() || amd_iommu_disabled)
|
|
disable_iommus();
|
|
|
|
if (amd_iommu_irq_remap)
|
|
amd_iommu_irq_remap = check_ioapic_information();
|
|
|
|
if (amd_iommu_irq_remap) {
|
|
/*
|
|
* Interrupt remapping enabled, create kmem_cache for the
|
|
* remapping tables.
|
|
*/
|
|
ret = -ENOMEM;
|
|
if (!AMD_IOMMU_GUEST_IR_GA(amd_iommu_guest_ir))
|
|
remap_cache_sz = MAX_IRQS_PER_TABLE * sizeof(u32);
|
|
else
|
|
remap_cache_sz = MAX_IRQS_PER_TABLE * (sizeof(u64) * 2);
|
|
amd_iommu_irq_cache = kmem_cache_create("irq_remap_cache",
|
|
remap_cache_sz,
|
|
IRQ_TABLE_ALIGNMENT,
|
|
0, NULL);
|
|
if (!amd_iommu_irq_cache)
|
|
goto out;
|
|
|
|
irq_lookup_table = (void *)__get_free_pages(
|
|
GFP_KERNEL | __GFP_ZERO,
|
|
get_order(rlookup_table_size));
|
|
kmemleak_alloc(irq_lookup_table, rlookup_table_size,
|
|
1, GFP_KERNEL);
|
|
if (!irq_lookup_table)
|
|
goto out;
|
|
}
|
|
|
|
ret = init_memory_definitions(ivrs_base);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/* init the device table */
|
|
init_device_table();
|
|
|
|
out:
|
|
/* Don't leak any ACPI memory */
|
|
acpi_put_table(ivrs_base);
|
|
ivrs_base = NULL;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int amd_iommu_enable_interrupts(void)
|
|
{
|
|
struct amd_iommu *iommu;
|
|
int ret = 0;
|
|
|
|
for_each_iommu(iommu) {
|
|
ret = iommu_init_msi(iommu);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static bool detect_ivrs(void)
|
|
{
|
|
struct acpi_table_header *ivrs_base;
|
|
acpi_status status;
|
|
|
|
status = acpi_get_table("IVRS", 0, &ivrs_base);
|
|
if (status == AE_NOT_FOUND)
|
|
return false;
|
|
else if (ACPI_FAILURE(status)) {
|
|
const char *err = acpi_format_exception(status);
|
|
pr_err("AMD-Vi: IVRS table error: %s\n", err);
|
|
return false;
|
|
}
|
|
|
|
acpi_put_table(ivrs_base);
|
|
|
|
/* Make sure ACS will be enabled during PCI probe */
|
|
pci_request_acs();
|
|
|
|
return true;
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* AMD IOMMU Initialization State Machine
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int __init state_next(void)
|
|
{
|
|
int ret = 0;
|
|
|
|
switch (init_state) {
|
|
case IOMMU_START_STATE:
|
|
if (!detect_ivrs()) {
|
|
init_state = IOMMU_NOT_FOUND;
|
|
ret = -ENODEV;
|
|
} else {
|
|
init_state = IOMMU_IVRS_DETECTED;
|
|
}
|
|
break;
|
|
case IOMMU_IVRS_DETECTED:
|
|
ret = early_amd_iommu_init();
|
|
init_state = ret ? IOMMU_INIT_ERROR : IOMMU_ACPI_FINISHED;
|
|
if (init_state == IOMMU_ACPI_FINISHED && amd_iommu_disabled) {
|
|
pr_info("AMD-Vi: AMD IOMMU disabled on kernel command-line\n");
|
|
free_dma_resources();
|
|
free_iommu_resources();
|
|
init_state = IOMMU_CMDLINE_DISABLED;
|
|
ret = -EINVAL;
|
|
}
|
|
break;
|
|
case IOMMU_ACPI_FINISHED:
|
|
early_enable_iommus();
|
|
x86_platform.iommu_shutdown = disable_iommus;
|
|
init_state = IOMMU_ENABLED;
|
|
break;
|
|
case IOMMU_ENABLED:
|
|
register_syscore_ops(&amd_iommu_syscore_ops);
|
|
ret = amd_iommu_init_pci();
|
|
init_state = ret ? IOMMU_INIT_ERROR : IOMMU_PCI_INIT;
|
|
enable_iommus_v2();
|
|
break;
|
|
case IOMMU_PCI_INIT:
|
|
ret = amd_iommu_enable_interrupts();
|
|
init_state = ret ? IOMMU_INIT_ERROR : IOMMU_INTERRUPTS_EN;
|
|
break;
|
|
case IOMMU_INTERRUPTS_EN:
|
|
ret = amd_iommu_init_dma_ops();
|
|
init_state = ret ? IOMMU_INIT_ERROR : IOMMU_DMA_OPS;
|
|
break;
|
|
case IOMMU_DMA_OPS:
|
|
init_state = IOMMU_INITIALIZED;
|
|
break;
|
|
case IOMMU_INITIALIZED:
|
|
/* Nothing to do */
|
|
break;
|
|
case IOMMU_NOT_FOUND:
|
|
case IOMMU_INIT_ERROR:
|
|
case IOMMU_CMDLINE_DISABLED:
|
|
/* Error states => do nothing */
|
|
ret = -EINVAL;
|
|
break;
|
|
default:
|
|
/* Unknown state */
|
|
BUG();
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __init iommu_go_to_state(enum iommu_init_state state)
|
|
{
|
|
int ret = -EINVAL;
|
|
|
|
while (init_state != state) {
|
|
if (init_state == IOMMU_NOT_FOUND ||
|
|
init_state == IOMMU_INIT_ERROR ||
|
|
init_state == IOMMU_CMDLINE_DISABLED)
|
|
break;
|
|
ret = state_next();
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_IRQ_REMAP
|
|
int __init amd_iommu_prepare(void)
|
|
{
|
|
int ret;
|
|
|
|
amd_iommu_irq_remap = true;
|
|
|
|
ret = iommu_go_to_state(IOMMU_ACPI_FINISHED);
|
|
if (ret)
|
|
return ret;
|
|
return amd_iommu_irq_remap ? 0 : -ENODEV;
|
|
}
|
|
|
|
int __init amd_iommu_enable(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = iommu_go_to_state(IOMMU_ENABLED);
|
|
if (ret)
|
|
return ret;
|
|
|
|
irq_remapping_enabled = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void amd_iommu_disable(void)
|
|
{
|
|
amd_iommu_suspend();
|
|
}
|
|
|
|
int amd_iommu_reenable(int mode)
|
|
{
|
|
amd_iommu_resume();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int __init amd_iommu_enable_faulting(void)
|
|
{
|
|
/* We enable MSI later when PCI is initialized */
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* This is the core init function for AMD IOMMU hardware in the system.
|
|
* This function is called from the generic x86 DMA layer initialization
|
|
* code.
|
|
*/
|
|
static int __init amd_iommu_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = iommu_go_to_state(IOMMU_INITIALIZED);
|
|
if (ret) {
|
|
free_dma_resources();
|
|
if (!irq_remapping_enabled) {
|
|
disable_iommus();
|
|
free_iommu_resources();
|
|
} else {
|
|
struct amd_iommu *iommu;
|
|
|
|
uninit_device_table_dma();
|
|
for_each_iommu(iommu)
|
|
iommu_flush_all_caches(iommu);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static bool amd_iommu_sme_check(void)
|
|
{
|
|
if (!sme_active() || (boot_cpu_data.x86 != 0x17))
|
|
return true;
|
|
|
|
/* For Fam17h, a specific level of support is required */
|
|
if (boot_cpu_data.microcode >= 0x08001205)
|
|
return true;
|
|
|
|
if ((boot_cpu_data.microcode >= 0x08001126) &&
|
|
(boot_cpu_data.microcode <= 0x080011ff))
|
|
return true;
|
|
|
|
pr_notice("AMD-Vi: IOMMU not currently supported when SME is active\n");
|
|
|
|
return false;
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* Early detect code. This code runs at IOMMU detection time in the DMA
|
|
* layer. It just looks if there is an IVRS ACPI table to detect AMD
|
|
* IOMMUs
|
|
*
|
|
****************************************************************************/
|
|
int __init amd_iommu_detect(void)
|
|
{
|
|
int ret;
|
|
|
|
if (no_iommu || (iommu_detected && !gart_iommu_aperture))
|
|
return -ENODEV;
|
|
|
|
if (!amd_iommu_sme_check())
|
|
return -ENODEV;
|
|
|
|
ret = iommu_go_to_state(IOMMU_IVRS_DETECTED);
|
|
if (ret)
|
|
return ret;
|
|
|
|
amd_iommu_detected = true;
|
|
iommu_detected = 1;
|
|
x86_init.iommu.iommu_init = amd_iommu_init;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/****************************************************************************
|
|
*
|
|
* Parsing functions for the AMD IOMMU specific kernel command line
|
|
* options.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int __init parse_amd_iommu_dump(char *str)
|
|
{
|
|
amd_iommu_dump = true;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int __init parse_amd_iommu_intr(char *str)
|
|
{
|
|
for (; *str; ++str) {
|
|
if (strncmp(str, "legacy", 6) == 0) {
|
|
amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY;
|
|
break;
|
|
}
|
|
if (strncmp(str, "vapic", 5) == 0) {
|
|
amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_VAPIC;
|
|
break;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int __init parse_amd_iommu_options(char *str)
|
|
{
|
|
for (; *str; ++str) {
|
|
if (strncmp(str, "fullflush", 9) == 0)
|
|
amd_iommu_unmap_flush = true;
|
|
if (strncmp(str, "off", 3) == 0)
|
|
amd_iommu_disabled = true;
|
|
if (strncmp(str, "force_isolation", 15) == 0)
|
|
amd_iommu_force_isolation = true;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int __init parse_ivrs_ioapic(char *str)
|
|
{
|
|
unsigned int bus, dev, fn;
|
|
int ret, id, i;
|
|
u16 devid;
|
|
|
|
ret = sscanf(str, "[%d]=%x:%x.%x", &id, &bus, &dev, &fn);
|
|
|
|
if (ret != 4) {
|
|
pr_err("AMD-Vi: Invalid command line: ivrs_ioapic%s\n", str);
|
|
return 1;
|
|
}
|
|
|
|
if (early_ioapic_map_size == EARLY_MAP_SIZE) {
|
|
pr_err("AMD-Vi: Early IOAPIC map overflow - ignoring ivrs_ioapic%s\n",
|
|
str);
|
|
return 1;
|
|
}
|
|
|
|
devid = ((bus & 0xff) << 8) | ((dev & 0x1f) << 3) | (fn & 0x7);
|
|
|
|
cmdline_maps = true;
|
|
i = early_ioapic_map_size++;
|
|
early_ioapic_map[i].id = id;
|
|
early_ioapic_map[i].devid = devid;
|
|
early_ioapic_map[i].cmd_line = true;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int __init parse_ivrs_hpet(char *str)
|
|
{
|
|
unsigned int bus, dev, fn;
|
|
int ret, id, i;
|
|
u16 devid;
|
|
|
|
ret = sscanf(str, "[%d]=%x:%x.%x", &id, &bus, &dev, &fn);
|
|
|
|
if (ret != 4) {
|
|
pr_err("AMD-Vi: Invalid command line: ivrs_hpet%s\n", str);
|
|
return 1;
|
|
}
|
|
|
|
if (early_hpet_map_size == EARLY_MAP_SIZE) {
|
|
pr_err("AMD-Vi: Early HPET map overflow - ignoring ivrs_hpet%s\n",
|
|
str);
|
|
return 1;
|
|
}
|
|
|
|
devid = ((bus & 0xff) << 8) | ((dev & 0x1f) << 3) | (fn & 0x7);
|
|
|
|
cmdline_maps = true;
|
|
i = early_hpet_map_size++;
|
|
early_hpet_map[i].id = id;
|
|
early_hpet_map[i].devid = devid;
|
|
early_hpet_map[i].cmd_line = true;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int __init parse_ivrs_acpihid(char *str)
|
|
{
|
|
u32 bus, dev, fn;
|
|
char *hid, *uid, *p;
|
|
char acpiid[ACPIHID_UID_LEN + ACPIHID_HID_LEN] = {0};
|
|
int ret, i;
|
|
|
|
ret = sscanf(str, "[%x:%x.%x]=%s", &bus, &dev, &fn, acpiid);
|
|
if (ret != 4) {
|
|
pr_err("AMD-Vi: Invalid command line: ivrs_acpihid(%s)\n", str);
|
|
return 1;
|
|
}
|
|
|
|
p = acpiid;
|
|
hid = strsep(&p, ":");
|
|
uid = p;
|
|
|
|
if (!hid || !(*hid) || !uid) {
|
|
pr_err("AMD-Vi: Invalid command line: hid or uid\n");
|
|
return 1;
|
|
}
|
|
|
|
i = early_acpihid_map_size++;
|
|
memcpy(early_acpihid_map[i].hid, hid, strlen(hid));
|
|
memcpy(early_acpihid_map[i].uid, uid, strlen(uid));
|
|
early_acpihid_map[i].devid =
|
|
((bus & 0xff) << 8) | ((dev & 0x1f) << 3) | (fn & 0x7);
|
|
early_acpihid_map[i].cmd_line = true;
|
|
|
|
return 1;
|
|
}
|
|
|
|
__setup("amd_iommu_dump", parse_amd_iommu_dump);
|
|
__setup("amd_iommu=", parse_amd_iommu_options);
|
|
__setup("amd_iommu_intr=", parse_amd_iommu_intr);
|
|
__setup("ivrs_ioapic", parse_ivrs_ioapic);
|
|
__setup("ivrs_hpet", parse_ivrs_hpet);
|
|
__setup("ivrs_acpihid", parse_ivrs_acpihid);
|
|
|
|
IOMMU_INIT_FINISH(amd_iommu_detect,
|
|
gart_iommu_hole_init,
|
|
NULL,
|
|
NULL);
|
|
|
|
bool amd_iommu_v2_supported(void)
|
|
{
|
|
return amd_iommu_v2_present;
|
|
}
|
|
EXPORT_SYMBOL(amd_iommu_v2_supported);
|
|
|
|
struct amd_iommu *get_amd_iommu(unsigned int idx)
|
|
{
|
|
unsigned int i = 0;
|
|
struct amd_iommu *iommu;
|
|
|
|
for_each_iommu(iommu)
|
|
if (i++ == idx)
|
|
return iommu;
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(get_amd_iommu);
|
|
|
|
/****************************************************************************
|
|
*
|
|
* IOMMU EFR Performance Counter support functionality. This code allows
|
|
* access to the IOMMU PC functionality.
|
|
*
|
|
****************************************************************************/
|
|
|
|
u8 amd_iommu_pc_get_max_banks(unsigned int idx)
|
|
{
|
|
struct amd_iommu *iommu = get_amd_iommu(idx);
|
|
|
|
if (iommu)
|
|
return iommu->max_banks;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(amd_iommu_pc_get_max_banks);
|
|
|
|
bool amd_iommu_pc_supported(void)
|
|
{
|
|
return amd_iommu_pc_present;
|
|
}
|
|
EXPORT_SYMBOL(amd_iommu_pc_supported);
|
|
|
|
u8 amd_iommu_pc_get_max_counters(unsigned int idx)
|
|
{
|
|
struct amd_iommu *iommu = get_amd_iommu(idx);
|
|
|
|
if (iommu)
|
|
return iommu->max_counters;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(amd_iommu_pc_get_max_counters);
|
|
|
|
static int iommu_pc_get_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
|
|
u8 fxn, u64 *value, bool is_write)
|
|
{
|
|
u32 offset;
|
|
u32 max_offset_lim;
|
|
|
|
/* Make sure the IOMMU PC resource is available */
|
|
if (!amd_iommu_pc_present)
|
|
return -ENODEV;
|
|
|
|
/* Check for valid iommu and pc register indexing */
|
|
if (WARN_ON(!iommu || (fxn > 0x28) || (fxn & 7)))
|
|
return -ENODEV;
|
|
|
|
offset = (u32)(((0x40 | bank) << 12) | (cntr << 8) | fxn);
|
|
|
|
/* Limit the offset to the hw defined mmio region aperture */
|
|
max_offset_lim = (u32)(((0x40 | iommu->max_banks) << 12) |
|
|
(iommu->max_counters << 8) | 0x28);
|
|
if ((offset < MMIO_CNTR_REG_OFFSET) ||
|
|
(offset > max_offset_lim))
|
|
return -EINVAL;
|
|
|
|
if (is_write) {
|
|
u64 val = *value & GENMASK_ULL(47, 0);
|
|
|
|
writel((u32)val, iommu->mmio_base + offset);
|
|
writel((val >> 32), iommu->mmio_base + offset + 4);
|
|
} else {
|
|
*value = readl(iommu->mmio_base + offset + 4);
|
|
*value <<= 32;
|
|
*value |= readl(iommu->mmio_base + offset);
|
|
*value &= GENMASK_ULL(47, 0);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
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int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, u64 *value)
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{
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if (!iommu)
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return -EINVAL;
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return iommu_pc_get_set_reg(iommu, bank, cntr, fxn, value, false);
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}
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EXPORT_SYMBOL(amd_iommu_pc_get_reg);
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int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, u64 *value)
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{
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if (!iommu)
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return -EINVAL;
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return iommu_pc_get_set_reg(iommu, bank, cntr, fxn, value, true);
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}
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EXPORT_SYMBOL(amd_iommu_pc_set_reg);
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