/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2016 Anish Gupta (anish@freebsd.org)
* Copyright (c) 2021 The FreeBSD Foundation
*
* Portions of this software were developed by Ka Ho Ng
* under sponsorship from the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _AMDVI_PRIV_H_
#define _AMDVI_PRIV_H_
#include <contrib/dev/acpica/include/acpi.h>
#define BIT(n) (1ULL << (n))
/* Return value of bits[n:m] where n and (n >= ) m are bit positions. */
#define REG_BITS(x, n, m) (((x) >> (m)) & \
((1 << (((n) - (m)) + 1)) - 1))
/*
* IOMMU PCI capability.
*/
#define AMDVI_PCI_CAP_IOTLB BIT(0) /* IOTLB is supported. */
#define AMDVI_PCI_CAP_HT BIT(1) /* HyperTransport tunnel support. */
#define AMDVI_PCI_CAP_NPCACHE BIT(2) /* Not present page cached. */
#define AMDVI_PCI_CAP_EFR BIT(3) /* Extended features. */
#define AMDVI_PCI_CAP_EXT BIT(4) /* Miscellaneous information reg. */
/*
* IOMMU extended features.
*/
#define AMDVI_EX_FEA_PREFSUP BIT(0) /* Prefetch command support. */
#define AMDVI_EX_FEA_PPRSUP BIT(1) /* PPR support */
#define AMDVI_EX_FEA_XTSUP BIT(2) /* Reserved */
#define AMDVI_EX_FEA_NXSUP BIT(3) /* No-execute. */
#define AMDVI_EX_FEA_GTSUP BIT(4) /* Guest translation support. */
#define AMDVI_EX_FEA_EFRW BIT(5) /* Reserved */
#define AMDVI_EX_FEA_IASUP BIT(6) /* Invalidate all command supp. */
#define AMDVI_EX_FEA_GASUP BIT(7) /* Guest APIC or AVIC support. */
#define AMDVI_EX_FEA_HESUP BIT(8) /* Hardware Error. */
#define AMDVI_EX_FEA_PCSUP BIT(9) /* Performance counters support. */
/* XXX: add more EFER bits. */
/*
* Device table entry or DTE
* NOTE: Must be 256-bits/32 bytes aligned.
*/
struct amdvi_dte {
uint32_t dt_valid:1; /* Device Table valid. */
uint32_t pt_valid:1; /* Page translation valid. */
uint16_t :7; /* Reserved[8:2] */
uint8_t pt_level:3; /* Paging level, 0 to disable. */
uint64_t pt_base:40; /* Page table root pointer. */
uint8_t :3; /* Reserved[54:52] */
uint8_t gv_valid:1; /* Revision 2, GVA to SPA. */
uint8_t gv_level:2; /* Revision 2, GLX level. */
uint8_t gv_cr3_lsb:3; /* Revision 2, GCR3[14:12] */
uint8_t read_allow:1; /* I/O read enabled. */
uint8_t write_allow:1; /* I/O write enabled. */
uint8_t :1; /* Reserved[63] */
uint16_t domain_id:16; /* Domain ID */
uint16_t gv_cr3_lsb2:16; /* Revision 2, GCR3[30:15] */
uint8_t iotlb_enable:1; /* Device support IOTLB */
uint8_t sup_second_io_fault:1; /* Suppress subsequent I/O faults. */
uint8_t sup_all_io_fault:1; /* Suppress all I/O page faults. */
uint8_t IOctl:2; /* Port I/O control. */
uint8_t iotlb_cache_disable:1; /* IOTLB cache hints. */
uint8_t snoop_disable:1; /* Snoop disable. */
uint8_t allow_ex:1; /* Allow exclusion. */
uint8_t sysmgmt:2; /* System management message.*/
uint8_t :1; /* Reserved[106] */
uint32_t gv_cr3_msb:21; /* Revision 2, GCR3[51:31] */
uint8_t intmap_valid:1; /* Interrupt map valid. */
uint8_t intmap_len:4; /* Interrupt map table length. */
uint8_t intmap_ign:1; /* Ignore unmapped interrupts. */
uint64_t intmap_base:46; /* IntMap base. */
uint8_t :4; /* Reserved[183:180] */
uint8_t init_pass:1; /* INIT pass through or PT */
uint8_t extintr_pass:1; /* External Interrupt PT */
uint8_t nmi_pass:1; /* NMI PT */
uint8_t :1; /* Reserved[187] */
uint8_t intr_ctrl:2; /* Interrupt control */
uint8_t lint0_pass:1; /* LINT0 PT */
uint8_t lint1_pass:1; /* LINT1 PT */
uint64_t :64; /* Reserved[255:192] */
} __attribute__((__packed__));
CTASSERT(sizeof(struct amdvi_dte) == 32);
/*
* IOMMU command entry.
*/
struct amdvi_cmd {
uint32_t word0;
uint32_t word1:28;
uint8_t opcode:4;
uint64_t addr;
} __attribute__((__packed__));
/* Command opcodes. */
#define AMDVI_CMP_WAIT_OPCODE 0x1 /* Completion wait. */
#define AMDVI_INVD_DTE_OPCODE 0x2 /* Invalidate device table entry. */
#define AMDVI_INVD_PAGE_OPCODE 0x3 /* Invalidate pages. */
#define AMDVI_INVD_IOTLB_OPCODE 0x4 /* Invalidate IOTLB pages. */
#define AMDVI_INVD_INTR_OPCODE 0x5 /* Invalidate Interrupt table. */
#define AMDVI_PREFETCH_PAGES_OPCODE 0x6 /* Prefetch IOMMU pages. */
#define AMDVI_COMP_PPR_OPCODE 0x7 /* Complete PPR request. */
#define AMDVI_INV_ALL_OPCODE 0x8 /* Invalidate all. */
/* Completion wait attributes. */
#define AMDVI_CMP_WAIT_STORE BIT(0) /* Write back data. */
#define AMDVI_CMP_WAIT_INTR BIT(1) /* Completion wait interrupt. */
#define AMDVI_CMP_WAIT_FLUSH BIT(2) /* Flush queue. */
/* Invalidate page. */
#define AMDVI_INVD_PAGE_S BIT(0) /* Invalidation size. */
#define AMDVI_INVD_PAGE_PDE BIT(1) /* Invalidate PDE. */
#define AMDVI_INVD_PAGE_GN_GVA BIT(2) /* GPA or GVA. */
#define AMDVI_INVD_PAGE_ALL_ADDR (0x7FFFFFFFFFFFFULL << 12)
/* Invalidate IOTLB. */
#define AMDVI_INVD_IOTLB_S BIT(0) /* Invalidation size 4k or addr */
#define AMDVI_INVD_IOTLB_GN_GVA BIT(2) /* GPA or GVA. */
#define AMDVI_INVD_IOTLB_ALL_ADDR (0x7FFFFFFFFFFFFULL << 12)
/* XXX: add more command entries. */
/*
* IOMMU event entry.
*/
struct amdvi_event {
uint16_t devid;
uint16_t pasid_hi;
uint16_t pasid_domid; /* PASID low or DomainID */
uint16_t flag:12;
uint8_t opcode:4;
uint64_t addr;
} __attribute__((__packed__));
CTASSERT(sizeof(struct amdvi_event) == 16);
/* Various event types. */
#define AMDVI_EVENT_INVALID_DTE 0x1
#define AMDVI_EVENT_PFAULT 0x2
#define AMDVI_EVENT_DTE_HW_ERROR 0x3
#define AMDVI_EVENT_PAGE_HW_ERROR 0x4
#define AMDVI_EVENT_ILLEGAL_CMD 0x5
#define AMDVI_EVENT_CMD_HW_ERROR 0x6
#define AMDVI_EVENT_IOTLB_TIMEOUT 0x7
#define AMDVI_EVENT_INVALID_DTE_REQ 0x8
#define AMDVI_EVENT_INVALID_PPR_REQ 0x9
#define AMDVI_EVENT_COUNTER_ZERO 0xA
#define AMDVI_EVENT_FLAG_MASK 0x1FF /* Mask for event flags. */
#define AMDVI_EVENT_FLAG_TYPE(x) (((x) >> 9) & 0x3)
/*
* IOMMU control block.
*/
struct amdvi_ctrl {
struct {
uint16_t size:9;
uint16_t :3;
uint64_t base:40; /* Devtable register base. */
uint16_t :12;
} dte;
struct {
uint16_t :12;
uint64_t base:40;
uint8_t :4;
uint8_t len:4;
uint8_t :4;
} cmd;
struct {
uint16_t :12;
uint64_t base:40;
uint8_t :4;
uint8_t len:4;
uint8_t :4;
} event;
uint16_t control :13;
uint64_t :51;
struct {
uint8_t enable:1;
uint8_t allow:1;
uint16_t :10;
uint64_t base:40;
uint16_t :12;
uint16_t :12;
uint64_t limit:40;
uint16_t :12;
} excl;
/*
* Revision 2 only.
*/
uint64_t ex_feature;
struct {
uint16_t :12;
uint64_t base:40;
uint8_t :4;
uint8_t len:4;
uint8_t :4;
} ppr;
uint64_t first_event;
uint64_t second_event;
uint64_t event_status;
/* Revision 2 only, end. */
uint8_t pad1[0x1FA8]; /* Padding. */
uint32_t cmd_head:19;
uint64_t :45;
uint32_t cmd_tail:19;
uint64_t :45;
uint32_t evt_head:19;
uint64_t :45;
uint32_t evt_tail:19;
uint64_t :45;
uint32_t status:19;
uint64_t :45;
uint64_t pad2;
uint8_t :4;
uint16_t ppr_head:15;
uint64_t :45;
uint8_t :4;
uint16_t ppr_tail:15;
uint64_t :45;
uint8_t pad3[0x1FC0]; /* Padding. */
/* XXX: More for rev2. */
} __attribute__((__packed__));
CTASSERT(offsetof(struct amdvi_ctrl, pad1)== 0x58);
CTASSERT(offsetof(struct amdvi_ctrl, pad2)== 0x2028);
CTASSERT(offsetof(struct amdvi_ctrl, pad3)== 0x2040);
#define AMDVI_MMIO_V1_SIZE (4 * PAGE_SIZE) /* v1 size */
/*
* AMF IOMMU v2 size including event counters
*/
#define AMDVI_MMIO_V2_SIZE (8 * PAGE_SIZE)
CTASSERT(sizeof(struct amdvi_ctrl) == 0x4000);
CTASSERT(sizeof(struct amdvi_ctrl) == AMDVI_MMIO_V1_SIZE);
/* IVHD flag */
#define IVHD_FLAG_HTT BIT(0) /* Hypertransport Tunnel. */
#define IVHD_FLAG_PPW BIT(1) /* Pass posted write. */
#define IVHD_FLAG_RPPW BIT(2) /* Response pass posted write. */
#define IVHD_FLAG_ISOC BIT(3) /* Isoc support. */
#define IVHD_FLAG_IOTLB BIT(4) /* IOTLB support. */
#define IVHD_FLAG_COH BIT(5) /* Coherent control, default 1 */
#define IVHD_FLAG_PFS BIT(6) /* Prefetch IOMMU pages. */
#define IVHD_FLAG_PPRS BIT(7) /* Peripheral page support. */
/* IVHD device entry data setting. */
#define IVHD_DEV_LINT0_PASS BIT(6) /* LINT0 interrupts. */
#define IVHD_DEV_LINT1_PASS BIT(7) /* LINT1 interrupts. */
/* Bit[5:4] for System Mgmt. Bit3 is reserved. */
#define IVHD_DEV_INIT_PASS BIT(0) /* INIT */
#define IVHD_DEV_EXTINTR_PASS BIT(1) /* ExtInt */
#define IVHD_DEV_NMI_PASS BIT(2) /* NMI */
/* IVHD 8-byte extended data settings. */
#define IVHD_DEV_EXT_ATS_DISABLE BIT(31) /* Disable ATS */
/* IOMMU control register. */
#define AMDVI_CTRL_EN BIT(0) /* IOMMU enable. */
#define AMDVI_CTRL_HTT BIT(1) /* Hypertransport tunnel enable. */
#define AMDVI_CTRL_ELOG BIT(2) /* Event log enable. */
#define AMDVI_CTRL_ELOGINT BIT(3) /* Event log interrupt. */
#define AMDVI_CTRL_COMINT BIT(4) /* Completion wait interrupt. */
#define AMDVI_CTRL_PPW BIT(8)
#define AMDVI_CTRL_RPPW BIT(9)
#define AMDVI_CTRL_COH BIT(10)
#define AMDVI_CTRL_ISOC BIT(11)
#define AMDVI_CTRL_CMD BIT(12) /* Command buffer enable. */
#define AMDVI_CTRL_PPRLOG BIT(13)
#define AMDVI_CTRL_PPRINT BIT(14)
#define AMDVI_CTRL_PPREN BIT(15)
#define AMDVI_CTRL_GTE BIT(16) /* Guest translation enable. */
#define AMDVI_CTRL_GAE BIT(17) /* Guest APIC enable. */
/* Invalidation timeout. */
#define AMDVI_CTRL_INV_NO_TO 0 /* No timeout. */
#define AMDVI_CTRL_INV_TO_1ms 1 /* 1 ms */
#define AMDVI_CTRL_INV_TO_10ms 2 /* 10 ms */
#define AMDVI_CTRL_INV_TO_100ms 3 /* 100 ms */
#define AMDVI_CTRL_INV_TO_1S 4 /* 1 second */
#define AMDVI_CTRL_INV_TO_10S 5 /* 10 second */
#define AMDVI_CTRL_INV_TO_100S 6 /* 100 second */
/*
* Max number of PCI devices.
* 256 bus x 32 slot/devices x 8 functions.
*/
#define PCI_NUM_DEV_MAX 0x10000
/* Maximum number of domains supported by IOMMU. */
#define AMDVI_MAX_DOMAIN (BIT(16) - 1)
/*
* IOMMU Page Table attributes.
*/
#define AMDVI_PT_PRESENT BIT(0)
#define AMDVI_PT_COHERENT BIT(60)
#define AMDVI_PT_READ BIT(61)
#define AMDVI_PT_WRITE BIT(62)
#define AMDVI_PT_RW (AMDVI_PT_READ | AMDVI_PT_WRITE)
#define AMDVI_PT_MASK 0xFFFFFFFFFF000UL /* Only [51:12] for PA */
#define AMDVI_PD_LEVEL_SHIFT 9
#define AMDVI_PD_SUPER(x) (((x) >> AMDVI_PD_LEVEL_SHIFT) == 7)
/*
* IOMMU Status, offset 0x2020
*/
#define AMDVI_STATUS_EV_OF BIT(0) /* Event overflow. */
#define AMDVI_STATUS_EV_INTR BIT(1) /* Event interrupt. */
/* Completion wait command completed. */
#define AMDVI_STATUS_CMP BIT(2)
#define IVRS_CTRL_RID 1 /* MMIO RID */
/* ACPI IVHD */
struct ivhd_dev_cfg {
uint32_t start_id;
uint32_t end_id;
uint8_t data; /* Device configuration. */
bool enable_ats; /* ATS enabled for the device. */
int ats_qlen; /* ATS invalidation queue depth. */
};
struct amdvi_domain {
uint64_t *ptp; /* Highest level page table */
int ptp_level; /* Level of page tables */
u_int id; /* Domain id */
SLIST_ENTRY (amdvi_domain) next;
};
/*
* Different type of IVHD.
* XXX: Use AcpiIvrsType once new IVHD types are available.
*/
enum IvrsType
{
IVRS_TYPE_HARDWARE_LEGACY = ACPI_IVRS_TYPE_HARDWARE1,
/* Legacy without EFRi support. */
IVRS_TYPE_HARDWARE_EFR = ACPI_IVRS_TYPE_HARDWARE2,
/* With EFR support. */
IVRS_TYPE_HARDWARE_MIXED = 0x40, /* Mixed with EFR support. */
};
/*
* AMD IOMMU softc.
*/
struct amdvi_softc {
struct amdvi_ctrl *ctrl; /* Control area. */
device_t dev; /* IOMMU device. */
device_t pci_dev; /* IOMMU PCI function device. */
enum IvrsType ivhd_type; /* IOMMU IVHD type. */
bool iotlb; /* IOTLB supported by IOMMU */
struct amdvi_cmd *cmd; /* Command descriptor area. */
int cmd_max; /* Max number of commands. */
uint64_t cmp_data; /* Command completion write back. */
struct amdvi_event *event; /* Event descriptor area. */
int event_max; /* Max number of events. */
/* ACPI various flags. */
uint32_t ivhd_flag; /* ACPI IVHD flag. */
uint32_t ivhd_feature; /* ACPI v1 Reserved or v2 attribute. */
uint64_t ext_feature; /* IVHD EFR */
/* PCI related. */
uint16_t cap_off; /* PCI Capability offset. */
uint8_t pci_cap; /* PCI capability. */
uint16_t pci_seg; /* IOMMU PCI domain/segment. */
uint16_t pci_rid; /* PCI BDF of IOMMU */
/* ACPI device configuration for end points. */
struct ivhd_dev_cfg *dev_cfg;
int dev_cfg_cnt;
int dev_cfg_cap;
/* Software statistics. */
uint64_t event_intr_cnt; /* Total event INTR count. */
uint64_t total_cmd; /* Total number of commands. */
};
int amdvi_setup_hw(struct amdvi_softc *softc);
int amdvi_teardown_hw(struct amdvi_softc *softc);
#endif /* _AMDVI_PRIV_H_ */
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