| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Tomasz Jeznach | 1845 | 100.00% | 2 | 100.00% |
| Total | 1845 | 2 |
/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright © 2022-2024 Rivos Inc. * Copyright © 2023 FORTH-ICS/CARV * Copyright © 2023 RISC-V IOMMU Task Group * * RISC-V IOMMU - Register Layout and Data Structures. * * Based on the 'RISC-V IOMMU Architecture Specification', Version 1.0 * Published at https://github.com/riscv-non-isa/riscv-iommu * */ #ifndef _RISCV_IOMMU_BITS_H_ #define _RISCV_IOMMU_BITS_H_ #include <linux/types.h> #include <linux/bitfield.h> #include <linux/bits.h> /* * Chapter 5: Memory Mapped register interface */ /* Common field positions */ #define RISCV_IOMMU_PPN_FIELD GENMASK_ULL(53, 10) #define RISCV_IOMMU_QUEUE_LOG2SZ_FIELD GENMASK_ULL(4, 0) #define RISCV_IOMMU_QUEUE_INDEX_FIELD GENMASK_ULL(31, 0) #define RISCV_IOMMU_QUEUE_ENABLE BIT(0) #define RISCV_IOMMU_QUEUE_INTR_ENABLE BIT(1) #define RISCV_IOMMU_QUEUE_MEM_FAULT BIT(8) #define RISCV_IOMMU_QUEUE_OVERFLOW BIT(9) #define RISCV_IOMMU_QUEUE_ACTIVE BIT(16) #define RISCV_IOMMU_QUEUE_BUSY BIT(17) #define RISCV_IOMMU_ATP_PPN_FIELD GENMASK_ULL(43, 0) #define RISCV_IOMMU_ATP_MODE_FIELD GENMASK_ULL(63, 60) /* 5.3 IOMMU Capabilities (64bits) */ #define RISCV_IOMMU_REG_CAPABILITIES 0x0000 #define RISCV_IOMMU_CAPABILITIES_VERSION GENMASK_ULL(7, 0) #define RISCV_IOMMU_CAPABILITIES_SV32 BIT_ULL(8) #define RISCV_IOMMU_CAPABILITIES_SV39 BIT_ULL(9) #define RISCV_IOMMU_CAPABILITIES_SV48 BIT_ULL(10) #define RISCV_IOMMU_CAPABILITIES_SV57 BIT_ULL(11) #define RISCV_IOMMU_CAPABILITIES_SVPBMT BIT_ULL(15) #define RISCV_IOMMU_CAPABILITIES_SV32X4 BIT_ULL(16) #define RISCV_IOMMU_CAPABILITIES_SV39X4 BIT_ULL(17) #define RISCV_IOMMU_CAPABILITIES_SV48X4 BIT_ULL(18) #define RISCV_IOMMU_CAPABILITIES_SV57X4 BIT_ULL(19) #define RISCV_IOMMU_CAPABILITIES_AMO_MRIF BIT_ULL(21) #define RISCV_IOMMU_CAPABILITIES_MSI_FLAT BIT_ULL(22) #define RISCV_IOMMU_CAPABILITIES_MSI_MRIF BIT_ULL(23) #define RISCV_IOMMU_CAPABILITIES_AMO_HWAD BIT_ULL(24) #define RISCV_IOMMU_CAPABILITIES_ATS BIT_ULL(25) #define RISCV_IOMMU_CAPABILITIES_T2GPA BIT_ULL(26) #define RISCV_IOMMU_CAPABILITIES_END BIT_ULL(27) #define RISCV_IOMMU_CAPABILITIES_IGS GENMASK_ULL(29, 28) #define RISCV_IOMMU_CAPABILITIES_HPM BIT_ULL(30) #define RISCV_IOMMU_CAPABILITIES_DBG BIT_ULL(31) #define RISCV_IOMMU_CAPABILITIES_PAS GENMASK_ULL(37, 32) #define RISCV_IOMMU_CAPABILITIES_PD8 BIT_ULL(38) #define RISCV_IOMMU_CAPABILITIES_PD17 BIT_ULL(39) #define RISCV_IOMMU_CAPABILITIES_PD20 BIT_ULL(40) /** * enum riscv_iommu_igs_settings - Interrupt Generation Support Settings * @RISCV_IOMMU_CAPABILITIES_IGS_MSI: IOMMU supports only MSI generation * @RISCV_IOMMU_CAPABILITIES_IGS_WSI: IOMMU supports only Wired-Signaled interrupt * @RISCV_IOMMU_CAPABILITIES_IGS_BOTH: IOMMU supports both MSI and WSI generation * @RISCV_IOMMU_CAPABILITIES_IGS_RSRV: Reserved for standard use */ enum riscv_iommu_igs_settings { RISCV_IOMMU_CAPABILITIES_IGS_MSI = 0, RISCV_IOMMU_CAPABILITIES_IGS_WSI = 1, RISCV_IOMMU_CAPABILITIES_IGS_BOTH = 2, RISCV_IOMMU_CAPABILITIES_IGS_RSRV = 3 }; /* 5.4 Features control register (32bits) */ #define RISCV_IOMMU_REG_FCTL 0x0008 #define RISCV_IOMMU_FCTL_BE BIT(0) #define RISCV_IOMMU_FCTL_WSI BIT(1) #define RISCV_IOMMU_FCTL_GXL BIT(2) /* 5.5 Device-directory-table pointer (64bits) */ #define RISCV_IOMMU_REG_DDTP 0x0010 #define RISCV_IOMMU_DDTP_IOMMU_MODE GENMASK_ULL(3, 0) #define RISCV_IOMMU_DDTP_BUSY BIT_ULL(4) #define RISCV_IOMMU_DDTP_PPN RISCV_IOMMU_PPN_FIELD /** * enum riscv_iommu_ddtp_modes - IOMMU translation modes * @RISCV_IOMMU_DDTP_IOMMU_MODE_OFF: No inbound transactions allowed * @RISCV_IOMMU_DDTP_IOMMU_MODE_BARE: Pass-through mode * @RISCV_IOMMU_DDTP_IOMMU_MODE_1LVL: One-level DDT * @RISCV_IOMMU_DDTP_IOMMU_MODE_2LVL: Two-level DDT * @RISCV_IOMMU_DDTP_IOMMU_MODE_3LVL: Three-level DDT * @RISCV_IOMMU_DDTP_IOMMU_MODE_MAX: Max value allowed by specification */ enum riscv_iommu_ddtp_modes { RISCV_IOMMU_DDTP_IOMMU_MODE_OFF = 0, RISCV_IOMMU_DDTP_IOMMU_MODE_BARE = 1, RISCV_IOMMU_DDTP_IOMMU_MODE_1LVL = 2, RISCV_IOMMU_DDTP_IOMMU_MODE_2LVL = 3, RISCV_IOMMU_DDTP_IOMMU_MODE_3LVL = 4, RISCV_IOMMU_DDTP_IOMMU_MODE_MAX = 4 }; /* 5.6 Command Queue Base (64bits) */ #define RISCV_IOMMU_REG_CQB 0x0018 #define RISCV_IOMMU_CQB_ENTRIES RISCV_IOMMU_QUEUE_LOG2SZ_FIELD #define RISCV_IOMMU_CQB_PPN RISCV_IOMMU_PPN_FIELD /* 5.7 Command Queue head (32bits) */ #define RISCV_IOMMU_REG_CQH 0x0020 #define RISCV_IOMMU_CQH_INDEX RISCV_IOMMU_QUEUE_INDEX_FIELD /* 5.8 Command Queue tail (32bits) */ #define RISCV_IOMMU_REG_CQT 0x0024 #define RISCV_IOMMU_CQT_INDEX RISCV_IOMMU_QUEUE_INDEX_FIELD /* 5.9 Fault Queue Base (64bits) */ #define RISCV_IOMMU_REG_FQB 0x0028 #define RISCV_IOMMU_FQB_ENTRIES RISCV_IOMMU_QUEUE_LOG2SZ_FIELD #define RISCV_IOMMU_FQB_PPN RISCV_IOMMU_PPN_FIELD /* 5.10 Fault Queue Head (32bits) */ #define RISCV_IOMMU_REG_FQH 0x0030 #define RISCV_IOMMU_FQH_INDEX RISCV_IOMMU_QUEUE_INDEX_FIELD /* 5.11 Fault Queue tail (32bits) */ #define RISCV_IOMMU_REG_FQT 0x0034 #define RISCV_IOMMU_FQT_INDEX RISCV_IOMMU_QUEUE_INDEX_FIELD /* 5.12 Page Request Queue base (64bits) */ #define RISCV_IOMMU_REG_PQB 0x0038 #define RISCV_IOMMU_PQB_ENTRIES RISCV_IOMMU_QUEUE_LOG2SZ_FIELD #define RISCV_IOMMU_PQB_PPN RISCV_IOMMU_PPN_FIELD /* 5.13 Page Request Queue head (32bits) */ #define RISCV_IOMMU_REG_PQH 0x0040 #define RISCV_IOMMU_PQH_INDEX RISCV_IOMMU_QUEUE_INDEX_FIELD /* 5.14 Page Request Queue tail (32bits) */ #define RISCV_IOMMU_REG_PQT 0x0044 #define RISCV_IOMMU_PQT_INDEX_MASK RISCV_IOMMU_QUEUE_INDEX_FIELD /* 5.15 Command Queue CSR (32bits) */ #define RISCV_IOMMU_REG_CQCSR 0x0048 #define RISCV_IOMMU_CQCSR_CQEN RISCV_IOMMU_QUEUE_ENABLE #define RISCV_IOMMU_CQCSR_CIE RISCV_IOMMU_QUEUE_INTR_ENABLE #define RISCV_IOMMU_CQCSR_CQMF RISCV_IOMMU_QUEUE_MEM_FAULT #define RISCV_IOMMU_CQCSR_CMD_TO BIT(9) #define RISCV_IOMMU_CQCSR_CMD_ILL BIT(10) #define RISCV_IOMMU_CQCSR_FENCE_W_IP BIT(11) #define RISCV_IOMMU_CQCSR_CQON RISCV_IOMMU_QUEUE_ACTIVE #define RISCV_IOMMU_CQCSR_BUSY RISCV_IOMMU_QUEUE_BUSY /* 5.16 Fault Queue CSR (32bits) */ #define RISCV_IOMMU_REG_FQCSR 0x004C #define RISCV_IOMMU_FQCSR_FQEN RISCV_IOMMU_QUEUE_ENABLE #define RISCV_IOMMU_FQCSR_FIE RISCV_IOMMU_QUEUE_INTR_ENABLE #define RISCV_IOMMU_FQCSR_FQMF RISCV_IOMMU_QUEUE_MEM_FAULT #define RISCV_IOMMU_FQCSR_FQOF RISCV_IOMMU_QUEUE_OVERFLOW #define RISCV_IOMMU_FQCSR_FQON RISCV_IOMMU_QUEUE_ACTIVE #define RISCV_IOMMU_FQCSR_BUSY RISCV_IOMMU_QUEUE_BUSY /* 5.17 Page Request Queue CSR (32bits) */ #define RISCV_IOMMU_REG_PQCSR 0x0050 #define RISCV_IOMMU_PQCSR_PQEN RISCV_IOMMU_QUEUE_ENABLE #define RISCV_IOMMU_PQCSR_PIE RISCV_IOMMU_QUEUE_INTR_ENABLE #define RISCV_IOMMU_PQCSR_PQMF RISCV_IOMMU_QUEUE_MEM_FAULT #define RISCV_IOMMU_PQCSR_PQOF RISCV_IOMMU_QUEUE_OVERFLOW #define RISCV_IOMMU_PQCSR_PQON RISCV_IOMMU_QUEUE_ACTIVE #define RISCV_IOMMU_PQCSR_BUSY RISCV_IOMMU_QUEUE_BUSY /* 5.18 Interrupt Pending Status (32bits) */ #define RISCV_IOMMU_REG_IPSR 0x0054 #define RISCV_IOMMU_INTR_CQ 0 #define RISCV_IOMMU_INTR_FQ 1 #define RISCV_IOMMU_INTR_PM 2 #define RISCV_IOMMU_INTR_PQ 3 #define RISCV_IOMMU_INTR_COUNT 4 #define RISCV_IOMMU_IPSR_CIP BIT(RISCV_IOMMU_INTR_CQ) #define RISCV_IOMMU_IPSR_FIP BIT(RISCV_IOMMU_INTR_FQ) #define RISCV_IOMMU_IPSR_PMIP BIT(RISCV_IOMMU_INTR_PM) #define RISCV_IOMMU_IPSR_PIP BIT(RISCV_IOMMU_INTR_PQ) /* 5.19 Performance monitoring counter overflow status (32bits) */ #define RISCV_IOMMU_REG_IOCOUNTOVF 0x0058 #define RISCV_IOMMU_IOCOUNTOVF_CY BIT(0) #define RISCV_IOMMU_IOCOUNTOVF_HPM GENMASK_ULL(31, 1) /* 5.20 Performance monitoring counter inhibits (32bits) */ #define RISCV_IOMMU_REG_IOCOUNTINH 0x005C #define RISCV_IOMMU_IOCOUNTINH_CY BIT(0) #define RISCV_IOMMU_IOCOUNTINH_HPM GENMASK(31, 1) /* 5.21 Performance monitoring cycles counter (64bits) */ #define RISCV_IOMMU_REG_IOHPMCYCLES 0x0060 #define RISCV_IOMMU_IOHPMCYCLES_COUNTER GENMASK_ULL(62, 0) #define RISCV_IOMMU_IOHPMCYCLES_OF BIT_ULL(63) /* 5.22 Performance monitoring event counters (31 * 64bits) */ #define RISCV_IOMMU_REG_IOHPMCTR_BASE 0x0068 #define RISCV_IOMMU_REG_IOHPMCTR(_n) (RISCV_IOMMU_REG_IOHPMCTR_BASE + ((_n) * 0x8)) /* 5.23 Performance monitoring event selectors (31 * 64bits) */ #define RISCV_IOMMU_REG_IOHPMEVT_BASE 0x0160 #define RISCV_IOMMU_REG_IOHPMEVT(_n) (RISCV_IOMMU_REG_IOHPMEVT_BASE + ((_n) * 0x8)) #define RISCV_IOMMU_IOHPMEVT_EVENTID GENMASK_ULL(14, 0) #define RISCV_IOMMU_IOHPMEVT_DMASK BIT_ULL(15) #define RISCV_IOMMU_IOHPMEVT_PID_PSCID GENMASK_ULL(35, 16) #define RISCV_IOMMU_IOHPMEVT_DID_GSCID GENMASK_ULL(59, 36) #define RISCV_IOMMU_IOHPMEVT_PV_PSCV BIT_ULL(60) #define RISCV_IOMMU_IOHPMEVT_DV_GSCV BIT_ULL(61) #define RISCV_IOMMU_IOHPMEVT_IDT BIT_ULL(62) #define RISCV_IOMMU_IOHPMEVT_OF BIT_ULL(63) /* Number of defined performance-monitoring event selectors */ #define RISCV_IOMMU_IOHPMEVT_CNT 31 /** * enum riscv_iommu_hpmevent_id - Performance-monitoring event identifier * * @RISCV_IOMMU_HPMEVENT_INVALID: Invalid event, do not count * @RISCV_IOMMU_HPMEVENT_URQ: Untranslated requests * @RISCV_IOMMU_HPMEVENT_TRQ: Translated requests * @RISCV_IOMMU_HPMEVENT_ATS_RQ: ATS translation requests * @RISCV_IOMMU_HPMEVENT_TLB_MISS: TLB misses * @RISCV_IOMMU_HPMEVENT_DD_WALK: Device directory walks * @RISCV_IOMMU_HPMEVENT_PD_WALK: Process directory walks * @RISCV_IOMMU_HPMEVENT_S_VS_WALKS: First-stage page table walks * @RISCV_IOMMU_HPMEVENT_G_WALKS: Second-stage page table walks * @RISCV_IOMMU_HPMEVENT_MAX: Value to denote maximum Event IDs */ enum riscv_iommu_hpmevent_id { RISCV_IOMMU_HPMEVENT_INVALID = 0, RISCV_IOMMU_HPMEVENT_URQ = 1, RISCV_IOMMU_HPMEVENT_TRQ = 2, RISCV_IOMMU_HPMEVENT_ATS_RQ = 3, RISCV_IOMMU_HPMEVENT_TLB_MISS = 4, RISCV_IOMMU_HPMEVENT_DD_WALK = 5, RISCV_IOMMU_HPMEVENT_PD_WALK = 6, RISCV_IOMMU_HPMEVENT_S_VS_WALKS = 7, RISCV_IOMMU_HPMEVENT_G_WALKS = 8, RISCV_IOMMU_HPMEVENT_MAX = 9 }; /* 5.24 Translation request IOVA (64bits) */ #define RISCV_IOMMU_REG_TR_REQ_IOVA 0x0258 #define RISCV_IOMMU_TR_REQ_IOVA_VPN GENMASK_ULL(63, 12) /* 5.25 Translation request control (64bits) */ #define RISCV_IOMMU_REG_TR_REQ_CTL 0x0260 #define RISCV_IOMMU_TR_REQ_CTL_GO_BUSY BIT_ULL(0) #define RISCV_IOMMU_TR_REQ_CTL_PRIV BIT_ULL(1) #define RISCV_IOMMU_TR_REQ_CTL_EXE BIT_ULL(2) #define RISCV_IOMMU_TR_REQ_CTL_NW BIT_ULL(3) #define RISCV_IOMMU_TR_REQ_CTL_PID GENMASK_ULL(31, 12) #define RISCV_IOMMU_TR_REQ_CTL_PV BIT_ULL(32) #define RISCV_IOMMU_TR_REQ_CTL_DID GENMASK_ULL(63, 40) /* 5.26 Translation request response (64bits) */ #define RISCV_IOMMU_REG_TR_RESPONSE 0x0268 #define RISCV_IOMMU_TR_RESPONSE_FAULT BIT_ULL(0) #define RISCV_IOMMU_TR_RESPONSE_PBMT GENMASK_ULL(8, 7) #define RISCV_IOMMU_TR_RESPONSE_SZ BIT_ULL(9) #define RISCV_IOMMU_TR_RESPONSE_PPN RISCV_IOMMU_PPN_FIELD /* 5.27 Interrupt cause to vector (64bits) */ #define RISCV_IOMMU_REG_ICVEC 0x02F8 #define RISCV_IOMMU_ICVEC_CIV GENMASK_ULL(3, 0) #define RISCV_IOMMU_ICVEC_FIV GENMASK_ULL(7, 4) #define RISCV_IOMMU_ICVEC_PMIV GENMASK_ULL(11, 8) #define RISCV_IOMMU_ICVEC_PIV GENMASK_ULL(15, 12) /* 5.28 MSI Configuration table (32 * 64bits) */ #define RISCV_IOMMU_REG_MSI_CFG_TBL 0x0300 #define RISCV_IOMMU_REG_MSI_CFG_TBL_ADDR(_n) \ (RISCV_IOMMU_REG_MSI_CFG_TBL + ((_n) * 0x10)) #define RISCV_IOMMU_MSI_CFG_TBL_ADDR GENMASK_ULL(55, 2) #define RISCV_IOMMU_REG_MSI_CFG_TBL_DATA(_n) \ (RISCV_IOMMU_REG_MSI_CFG_TBL + ((_n) * 0x10) + 0x08) #define RISCV_IOMMU_MSI_CFG_TBL_DATA GENMASK_ULL(31, 0) #define RISCV_IOMMU_REG_MSI_CFG_TBL_CTRL(_n) \ (RISCV_IOMMU_REG_MSI_CFG_TBL + ((_n) * 0x10) + 0x0C) #define RISCV_IOMMU_MSI_CFG_TBL_CTRL_M BIT_ULL(0) #define RISCV_IOMMU_REG_SIZE 0x1000 /* * Chapter 2: Data structures */ /* * Device Directory Table macros for non-leaf nodes */ #define RISCV_IOMMU_DDTE_V BIT_ULL(0) #define RISCV_IOMMU_DDTE_PPN RISCV_IOMMU_PPN_FIELD /** * struct riscv_iommu_dc - Device Context * @tc: Translation Control * @iohgatp: I/O Hypervisor guest address translation and protection * (Second stage context) * @ta: Translation Attributes * @fsc: First stage context * @msiptp: MSI page table pointer * @msi_addr_mask: MSI address mask * @msi_addr_pattern: MSI address pattern * @_reserved: Reserved for future use, padding * * This structure is used for leaf nodes on the Device Directory Table, * in case RISCV_IOMMU_CAPABILITIES_MSI_FLAT is not set, the bottom 4 fields * are not present and are skipped with pointer arithmetic to avoid * casting, check out riscv_iommu_get_dc(). * See section 2.1 for more details */ struct riscv_iommu_dc { u64 tc; u64 iohgatp; u64 ta; u64 fsc; u64 msiptp; u64 msi_addr_mask; u64 msi_addr_pattern; u64 _reserved; }; /* Translation control fields */ #define RISCV_IOMMU_DC_TC_V BIT_ULL(0) #define RISCV_IOMMU_DC_TC_EN_ATS BIT_ULL(1) #define RISCV_IOMMU_DC_TC_EN_PRI BIT_ULL(2) #define RISCV_IOMMU_DC_TC_T2GPA BIT_ULL(3) #define RISCV_IOMMU_DC_TC_DTF BIT_ULL(4) #define RISCV_IOMMU_DC_TC_PDTV BIT_ULL(5) #define RISCV_IOMMU_DC_TC_PRPR BIT_ULL(6) #define RISCV_IOMMU_DC_TC_GADE BIT_ULL(7) #define RISCV_IOMMU_DC_TC_SADE BIT_ULL(8) #define RISCV_IOMMU_DC_TC_DPE BIT_ULL(9) #define RISCV_IOMMU_DC_TC_SBE BIT_ULL(10) #define RISCV_IOMMU_DC_TC_SXL BIT_ULL(11) /* Second-stage (aka G-stage) context fields */ #define RISCV_IOMMU_DC_IOHGATP_PPN RISCV_IOMMU_ATP_PPN_FIELD #define RISCV_IOMMU_DC_IOHGATP_GSCID GENMASK_ULL(59, 44) #define RISCV_IOMMU_DC_IOHGATP_MODE RISCV_IOMMU_ATP_MODE_FIELD /** * enum riscv_iommu_dc_iohgatp_modes - Guest address translation/protection modes * @RISCV_IOMMU_DC_IOHGATP_MODE_BARE: No translation/protection * @RISCV_IOMMU_DC_IOHGATP_MODE_SV32X4: Sv32x4 (2-bit extension of Sv32), when fctl.GXL == 1 * @RISCV_IOMMU_DC_IOHGATP_MODE_SV39X4: Sv39x4 (2-bit extension of Sv39), when fctl.GXL == 0 * @RISCV_IOMMU_DC_IOHGATP_MODE_SV48X4: Sv48x4 (2-bit extension of Sv48), when fctl.GXL == 0 * @RISCV_IOMMU_DC_IOHGATP_MODE_SV57X4: Sv57x4 (2-bit extension of Sv57), when fctl.GXL == 0 */ enum riscv_iommu_dc_iohgatp_modes { RISCV_IOMMU_DC_IOHGATP_MODE_BARE = 0, RISCV_IOMMU_DC_IOHGATP_MODE_SV32X4 = 8, RISCV_IOMMU_DC_IOHGATP_MODE_SV39X4 = 8, RISCV_IOMMU_DC_IOHGATP_MODE_SV48X4 = 9, RISCV_IOMMU_DC_IOHGATP_MODE_SV57X4 = 10 }; /* Translation attributes fields */ #define RISCV_IOMMU_DC_TA_PSCID GENMASK_ULL(31, 12) /* First-stage context fields */ #define RISCV_IOMMU_DC_FSC_PPN RISCV_IOMMU_ATP_PPN_FIELD #define RISCV_IOMMU_DC_FSC_MODE RISCV_IOMMU_ATP_MODE_FIELD /** * enum riscv_iommu_dc_fsc_atp_modes - First stage address translation/protection modes * @RISCV_IOMMU_DC_FSC_MODE_BARE: No translation/protection * @RISCV_IOMMU_DC_FSC_IOSATP_MODE_SV32: Sv32, when dc.tc.SXL == 1 * @RISCV_IOMMU_DC_FSC_IOSATP_MODE_SV39: Sv39, when dc.tc.SXL == 0 * @RISCV_IOMMU_DC_FSC_IOSATP_MODE_SV48: Sv48, when dc.tc.SXL == 0 * @RISCV_IOMMU_DC_FSC_IOSATP_MODE_SV57: Sv57, when dc.tc.SXL == 0 * @RISCV_IOMMU_DC_FSC_PDTP_MODE_PD8: 1lvl PDT, 8bit process ids * @RISCV_IOMMU_DC_FSC_PDTP_MODE_PD17: 2lvl PDT, 17bit process ids * @RISCV_IOMMU_DC_FSC_PDTP_MODE_PD20: 3lvl PDT, 20bit process ids * * FSC holds IOSATP when RISCV_IOMMU_DC_TC_PDTV is 0 and PDTP otherwise. * IOSATP controls the first stage address translation (same as the satp register on * the RISC-V MMU), and PDTP holds the process directory table, used to select a * first stage page table based on a process id (for devices that support multiple * process ids). */ enum riscv_iommu_dc_fsc_atp_modes { RISCV_IOMMU_DC_FSC_MODE_BARE = 0, RISCV_IOMMU_DC_FSC_IOSATP_MODE_SV32 = 8, RISCV_IOMMU_DC_FSC_IOSATP_MODE_SV39 = 8, RISCV_IOMMU_DC_FSC_IOSATP_MODE_SV48 = 9, RISCV_IOMMU_DC_FSC_IOSATP_MODE_SV57 = 10, RISCV_IOMMU_DC_FSC_PDTP_MODE_PD8 = 1, RISCV_IOMMU_DC_FSC_PDTP_MODE_PD17 = 2, RISCV_IOMMU_DC_FSC_PDTP_MODE_PD20 = 3 }; /* MSI page table pointer */ #define RISCV_IOMMU_DC_MSIPTP_PPN RISCV_IOMMU_ATP_PPN_FIELD #define RISCV_IOMMU_DC_MSIPTP_MODE RISCV_IOMMU_ATP_MODE_FIELD #define RISCV_IOMMU_DC_MSIPTP_MODE_OFF 0 #define RISCV_IOMMU_DC_MSIPTP_MODE_FLAT 1 /* MSI address mask */ #define RISCV_IOMMU_DC_MSI_ADDR_MASK GENMASK_ULL(51, 0) /* MSI address pattern */ #define RISCV_IOMMU_DC_MSI_PATTERN GENMASK_ULL(51, 0) /** * struct riscv_iommu_pc - Process Context * @ta: Translation Attributes * @fsc: First stage context * * This structure is used for leaf nodes on the Process Directory Table * See section 2.3 for more details */ struct riscv_iommu_pc { u64 ta; u64 fsc; }; /* Translation attributes fields */ #define RISCV_IOMMU_PC_TA_V BIT_ULL(0) #define RISCV_IOMMU_PC_TA_ENS BIT_ULL(1) #define RISCV_IOMMU_PC_TA_SUM BIT_ULL(2) #define RISCV_IOMMU_PC_TA_PSCID GENMASK_ULL(31, 12) /* First stage context fields */ #define RISCV_IOMMU_PC_FSC_PPN RISCV_IOMMU_ATP_PPN_FIELD #define RISCV_IOMMU_PC_FSC_MODE RISCV_IOMMU_ATP_MODE_FIELD /* * Chapter 3: In-memory queue interface */ /** * struct riscv_iommu_command - Generic IOMMU command structure * @dword0: Includes the opcode and the function identifier * @dword1: Opcode specific data * * The commands are interpreted as two 64bit fields, where the first * 7bits of the first field are the opcode which also defines the * command's format, followed by a 3bit field that specifies the * function invoked by that command, and the rest is opcode-specific. * This is a generic struct which will be populated differently * according to each command. For more infos on the commands and * the command queue check section 3.1. */ struct riscv_iommu_command { u64 dword0; u64 dword1; }; /* Fields on dword0, common for all commands */ #define RISCV_IOMMU_CMD_OPCODE GENMASK_ULL(6, 0) #define RISCV_IOMMU_CMD_FUNC GENMASK_ULL(9, 7) /* 3.1.1 IOMMU Page-table cache invalidation */ /* Fields on dword0 */ #define RISCV_IOMMU_CMD_IOTINVAL_OPCODE 1 #define RISCV_IOMMU_CMD_IOTINVAL_FUNC_VMA 0 #define RISCV_IOMMU_CMD_IOTINVAL_FUNC_GVMA 1 #define RISCV_IOMMU_CMD_IOTINVAL_AV BIT_ULL(10) #define RISCV_IOMMU_CMD_IOTINVAL_PSCID GENMASK_ULL(31, 12) #define RISCV_IOMMU_CMD_IOTINVAL_PSCV BIT_ULL(32) #define RISCV_IOMMU_CMD_IOTINVAL_GV BIT_ULL(33) #define RISCV_IOMMU_CMD_IOTINVAL_GSCID GENMASK_ULL(59, 44) /* dword1[61:10] is the 4K-aligned page address */ #define RISCV_IOMMU_CMD_IOTINVAL_ADDR GENMASK_ULL(61, 10) /* 3.1.2 IOMMU Command Queue Fences */ /* Fields on dword0 */ #define RISCV_IOMMU_CMD_IOFENCE_OPCODE 2 #define RISCV_IOMMU_CMD_IOFENCE_FUNC_C 0 #define RISCV_IOMMU_CMD_IOFENCE_AV BIT_ULL(10) #define RISCV_IOMMU_CMD_IOFENCE_WSI BIT_ULL(11) #define RISCV_IOMMU_CMD_IOFENCE_PR BIT_ULL(12) #define RISCV_IOMMU_CMD_IOFENCE_PW BIT_ULL(13) #define RISCV_IOMMU_CMD_IOFENCE_DATA GENMASK_ULL(63, 32) /* dword1 is the address, word-size aligned and shifted to the right by two bits. */ /* 3.1.3 IOMMU Directory cache invalidation */ /* Fields on dword0 */ #define RISCV_IOMMU_CMD_IODIR_OPCODE 3 #define RISCV_IOMMU_CMD_IODIR_FUNC_INVAL_DDT 0 #define RISCV_IOMMU_CMD_IODIR_FUNC_INVAL_PDT 1 #define RISCV_IOMMU_CMD_IODIR_PID GENMASK_ULL(31, 12) #define RISCV_IOMMU_CMD_IODIR_DV BIT_ULL(33) #define RISCV_IOMMU_CMD_IODIR_DID GENMASK_ULL(63, 40) /* dword1 is reserved for standard use */ /* 3.1.4 IOMMU PCIe ATS */ /* Fields on dword0 */ #define RISCV_IOMMU_CMD_ATS_OPCODE 4 #define RISCV_IOMMU_CMD_ATS_FUNC_INVAL 0 #define RISCV_IOMMU_CMD_ATS_FUNC_PRGR 1 #define RISCV_IOMMU_CMD_ATS_PID GENMASK_ULL(31, 12) #define RISCV_IOMMU_CMD_ATS_PV BIT_ULL(32) #define RISCV_IOMMU_CMD_ATS_DSV BIT_ULL(33) #define RISCV_IOMMU_CMD_ATS_RID GENMASK_ULL(55, 40) #define RISCV_IOMMU_CMD_ATS_DSEG GENMASK_ULL(63, 56) /* dword1 is the ATS payload, two different payload types for INVAL and PRGR */ /* ATS.INVAL payload*/ #define RISCV_IOMMU_CMD_ATS_INVAL_G BIT_ULL(0) /* Bits 1 - 10 are zeroed */ #define RISCV_IOMMU_CMD_ATS_INVAL_S BIT_ULL(11) #define RISCV_IOMMU_CMD_ATS_INVAL_UADDR GENMASK_ULL(63, 12) /* ATS.PRGR payload */ /* Bits 0 - 31 are zeroed */ #define RISCV_IOMMU_CMD_ATS_PRGR_PRG_INDEX GENMASK_ULL(40, 32) /* Bits 41 - 43 are zeroed */ #define RISCV_IOMMU_CMD_ATS_PRGR_RESP_CODE GENMASK_ULL(47, 44) #define RISCV_IOMMU_CMD_ATS_PRGR_DST_ID GENMASK_ULL(63, 48) /** * struct riscv_iommu_fq_record - Fault/Event Queue Record * @hdr: Header, includes fault/event cause, PID/DID, transaction type etc * @_reserved: Low 32bits for custom use, high 32bits for standard use * @iotval: Transaction-type/cause specific format * @iotval2: Cause specific format * * The fault/event queue reports events and failures raised when * processing transactions. Each record is a 32byte structure where * the first dword has a fixed format for providing generic infos * regarding the fault/event, and two more dwords are there for * fault/event-specific information. For more details see section * 3.2. */ struct riscv_iommu_fq_record { u64 hdr; u64 _reserved; u64 iotval; u64 iotval2; }; /* Fields on header */ #define RISCV_IOMMU_FQ_HDR_CAUSE GENMASK_ULL(11, 0) #define RISCV_IOMMU_FQ_HDR_PID GENMASK_ULL(31, 12) #define RISCV_IOMMU_FQ_HDR_PV BIT_ULL(32) #define RISCV_IOMMU_FQ_HDR_PRIV BIT_ULL(33) #define RISCV_IOMMU_FQ_HDR_TTYP GENMASK_ULL(39, 34) #define RISCV_IOMMU_FQ_HDR_DID GENMASK_ULL(63, 40) /** * enum riscv_iommu_fq_causes - Fault/event cause values * @RISCV_IOMMU_FQ_CAUSE_INST_FAULT: Instruction access fault * @RISCV_IOMMU_FQ_CAUSE_RD_ADDR_MISALIGNED: Read address misaligned * @RISCV_IOMMU_FQ_CAUSE_RD_FAULT: Read load fault * @RISCV_IOMMU_FQ_CAUSE_WR_ADDR_MISALIGNED: Write/AMO address misaligned * @RISCV_IOMMU_FQ_CAUSE_WR_FAULT: Write/AMO access fault * @RISCV_IOMMU_FQ_CAUSE_INST_FAULT_S: Instruction page fault * @RISCV_IOMMU_FQ_CAUSE_RD_FAULT_S: Read page fault * @RISCV_IOMMU_FQ_CAUSE_WR_FAULT_S: Write/AMO page fault * @RISCV_IOMMU_FQ_CAUSE_INST_FAULT_VS: Instruction guest page fault * @RISCV_IOMMU_FQ_CAUSE_RD_FAULT_VS: Read guest page fault * @RISCV_IOMMU_FQ_CAUSE_WR_FAULT_VS: Write/AMO guest page fault * @RISCV_IOMMU_FQ_CAUSE_DMA_DISABLED: All inbound transactions disallowed * @RISCV_IOMMU_FQ_CAUSE_DDT_LOAD_FAULT: DDT entry load access fault * @RISCV_IOMMU_FQ_CAUSE_DDT_INVALID: DDT entry invalid * @RISCV_IOMMU_FQ_CAUSE_DDT_MISCONFIGURED: DDT entry misconfigured * @RISCV_IOMMU_FQ_CAUSE_TTYP_BLOCKED: Transaction type disallowed * @RISCV_IOMMU_FQ_CAUSE_MSI_LOAD_FAULT: MSI PTE load access fault * @RISCV_IOMMU_FQ_CAUSE_MSI_INVALID: MSI PTE invalid * @RISCV_IOMMU_FQ_CAUSE_MSI_MISCONFIGURED: MSI PTE misconfigured * @RISCV_IOMMU_FQ_CAUSE_MRIF_FAULT: MRIF access fault * @RISCV_IOMMU_FQ_CAUSE_PDT_LOAD_FAULT: PDT entry load access fault * @RISCV_IOMMU_FQ_CAUSE_PDT_INVALID: PDT entry invalid * @RISCV_IOMMU_FQ_CAUSE_PDT_MISCONFIGURED: PDT entry misconfigured * @RISCV_IOMMU_FQ_CAUSE_DDT_CORRUPTED: DDT data corruption * @RISCV_IOMMU_FQ_CAUSE_PDT_CORRUPTED: PDT data corruption * @RISCV_IOMMU_FQ_CAUSE_MSI_PT_CORRUPTED: MSI page table data corruption * @RISCV_IOMMU_FQ_CAUSE_MRIF_CORRUIPTED: MRIF data corruption * @RISCV_IOMMU_FQ_CAUSE_INTERNAL_DP_ERROR: Internal data path error * @RISCV_IOMMU_FQ_CAUSE_MSI_WR_FAULT: IOMMU MSI write access fault * @RISCV_IOMMU_FQ_CAUSE_PT_CORRUPTED: First/second stage page table data corruption * * Values are on table 11 of the spec, encodings 275 - 2047 are reserved for standard * use, and 2048 - 4095 for custom use. */ enum riscv_iommu_fq_causes { RISCV_IOMMU_FQ_CAUSE_INST_FAULT = 1, RISCV_IOMMU_FQ_CAUSE_RD_ADDR_MISALIGNED = 4, RISCV_IOMMU_FQ_CAUSE_RD_FAULT = 5, RISCV_IOMMU_FQ_CAUSE_WR_ADDR_MISALIGNED = 6, RISCV_IOMMU_FQ_CAUSE_WR_FAULT = 7, RISCV_IOMMU_FQ_CAUSE_INST_FAULT_S = 12, RISCV_IOMMU_FQ_CAUSE_RD_FAULT_S = 13, RISCV_IOMMU_FQ_CAUSE_WR_FAULT_S = 15, RISCV_IOMMU_FQ_CAUSE_INST_FAULT_VS = 20, RISCV_IOMMU_FQ_CAUSE_RD_FAULT_VS = 21, RISCV_IOMMU_FQ_CAUSE_WR_FAULT_VS = 23, RISCV_IOMMU_FQ_CAUSE_DMA_DISABLED = 256, RISCV_IOMMU_FQ_CAUSE_DDT_LOAD_FAULT = 257, RISCV_IOMMU_FQ_CAUSE_DDT_INVALID = 258, RISCV_IOMMU_FQ_CAUSE_DDT_MISCONFIGURED = 259, RISCV_IOMMU_FQ_CAUSE_TTYP_BLOCKED = 260, RISCV_IOMMU_FQ_CAUSE_MSI_LOAD_FAULT = 261, RISCV_IOMMU_FQ_CAUSE_MSI_INVALID = 262, RISCV_IOMMU_FQ_CAUSE_MSI_MISCONFIGURED = 263, RISCV_IOMMU_FQ_CAUSE_MRIF_FAULT = 264, RISCV_IOMMU_FQ_CAUSE_PDT_LOAD_FAULT = 265, RISCV_IOMMU_FQ_CAUSE_PDT_INVALID = 266, RISCV_IOMMU_FQ_CAUSE_PDT_MISCONFIGURED = 267, RISCV_IOMMU_FQ_CAUSE_DDT_CORRUPTED = 268, RISCV_IOMMU_FQ_CAUSE_PDT_CORRUPTED = 269, RISCV_IOMMU_FQ_CAUSE_MSI_PT_CORRUPTED = 270, RISCV_IOMMU_FQ_CAUSE_MRIF_CORRUIPTED = 271, RISCV_IOMMU_FQ_CAUSE_INTERNAL_DP_ERROR = 272, RISCV_IOMMU_FQ_CAUSE_MSI_WR_FAULT = 273, RISCV_IOMMU_FQ_CAUSE_PT_CORRUPTED = 274 }; /** * enum riscv_iommu_fq_ttypes: Fault/event transaction types * @RISCV_IOMMU_FQ_TTYP_NONE: None. Fault not caused by an inbound transaction. * @RISCV_IOMMU_FQ_TTYP_UADDR_INST_FETCH: Instruction fetch from untranslated address * @RISCV_IOMMU_FQ_TTYP_UADDR_RD: Read from untranslated address * @RISCV_IOMMU_FQ_TTYP_UADDR_WR: Write/AMO to untranslated address * @RISCV_IOMMU_FQ_TTYP_TADDR_INST_FETCH: Instruction fetch from translated address * @RISCV_IOMMU_FQ_TTYP_TADDR_RD: Read from translated address * @RISCV_IOMMU_FQ_TTYP_TADDR_WR: Write/AMO to translated address * @RISCV_IOMMU_FQ_TTYP_PCIE_ATS_REQ: PCIe ATS translation request * @RISCV_IOMMU_FQ_TTYP_PCIE_MSG_REQ: PCIe message request * * Values are on table 12 of the spec, type 4 and 10 - 31 are reserved for standard use * and 31 - 63 for custom use. */ enum riscv_iommu_fq_ttypes { RISCV_IOMMU_FQ_TTYP_NONE = 0, RISCV_IOMMU_FQ_TTYP_UADDR_INST_FETCH = 1, RISCV_IOMMU_FQ_TTYP_UADDR_RD = 2, RISCV_IOMMU_FQ_TTYP_UADDR_WR = 3, RISCV_IOMMU_FQ_TTYP_TADDR_INST_FETCH = 5, RISCV_IOMMU_FQ_TTYP_TADDR_RD = 6, RISCV_IOMMU_FQ_TTYP_TADDR_WR = 7, RISCV_IOMMU_FQ_TTYP_PCIE_ATS_REQ = 8, RISCV_IOMMU_FQ_TTYP_PCIE_MSG_REQ = 9, }; /** * struct riscv_iommu_pq_record - PCIe Page Request record * @hdr: Header, includes PID, DID etc * @payload: Holds the page address, request group and permission bits * * For more infos on the PCIe Page Request queue see chapter 3.3. */ struct riscv_iommu_pq_record { u64 hdr; u64 payload; }; /* Header fields */ #define RISCV_IOMMU_PQ_HDR_PID GENMASK_ULL(31, 12) #define RISCV_IOMMU_PQ_HDR_PV BIT_ULL(32) #define RISCV_IOMMU_PQ_HDR_PRIV BIT_ULL(33) #define RISCV_IOMMU_PQ_HDR_EXEC BIT_ULL(34) #define RISCV_IOMMU_PQ_HDR_DID GENMASK_ULL(63, 40) /* Payload fields */ #define RISCV_IOMMU_PQ_PAYLOAD_R BIT_ULL(0) #define RISCV_IOMMU_PQ_PAYLOAD_W BIT_ULL(1) #define RISCV_IOMMU_PQ_PAYLOAD_L BIT_ULL(2) #define RISCV_IOMMU_PQ_PAYLOAD_RWL_MASK GENMASK_ULL(2, 0) #define RISCV_IOMMU_PQ_PAYLOAD_PRGI GENMASK_ULL(11, 3) /* Page Request Group Index */ #define RISCV_IOMMU_PQ_PAYLOAD_ADDR GENMASK_ULL(63, 12) /** * struct riscv_iommu_msipte - MSI Page Table Entry * @pte: MSI PTE * @mrif_info: Memory-resident interrupt file info * * The MSI Page Table is used for virtualizing MSIs, so that when * a device sends an MSI to a guest, the IOMMU can reroute it * by translating the MSI address, either to a guest interrupt file * or a memory resident interrupt file (MRIF). Note that this page table * is an array of MSI PTEs, not a multi-level pt, each entry * is a leaf entry. For more infos check out the AIA spec, chapter 9.5. * * Also in basic mode the mrif_info field is ignored by the IOMMU and can * be used by software, any other reserved fields on pte must be zeroed-out * by software. */ struct riscv_iommu_msipte { u64 pte; u64 mrif_info; }; /* Fields on pte */ #define RISCV_IOMMU_MSIPTE_V BIT_ULL(0) #define RISCV_IOMMU_MSIPTE_M GENMASK_ULL(2, 1) #define RISCV_IOMMU_MSIPTE_MRIF_ADDR GENMASK_ULL(53, 7) /* When M == 1 (MRIF mode) */ #define RISCV_IOMMU_MSIPTE_PPN RISCV_IOMMU_PPN_FIELD /* When M == 3 (basic mode) */ #define RISCV_IOMMU_MSIPTE_C BIT_ULL(63) /* Fields on mrif_info */ #define RISCV_IOMMU_MSIPTE_MRIF_NID GENMASK_ULL(9, 0) #define RISCV_IOMMU_MSIPTE_MRIF_NPPN RISCV_IOMMU_PPN_FIELD #define RISCV_IOMMU_MSIPTE_MRIF_NID_MSB BIT_ULL(60) /* Helper functions: command structure builders. */ static inline void riscv_iommu_cmd_inval_vma(struct riscv_iommu_command *cmd) { cmd->dword0 = FIELD_PREP(RISCV_IOMMU_CMD_OPCODE, RISCV_IOMMU_CMD_IOTINVAL_OPCODE) | FIELD_PREP(RISCV_IOMMU_CMD_FUNC, RISCV_IOMMU_CMD_IOTINVAL_FUNC_VMA); cmd->dword1 = 0; } static inline void riscv_iommu_cmd_inval_set_addr(struct riscv_iommu_command *cmd, u64 addr) { cmd->dword1 = FIELD_PREP(RISCV_IOMMU_CMD_IOTINVAL_ADDR, phys_to_pfn(addr)); cmd->dword0 |= RISCV_IOMMU_CMD_IOTINVAL_AV; } static inline void riscv_iommu_cmd_inval_set_pscid(struct riscv_iommu_command *cmd, int pscid) { cmd->dword0 |= FIELD_PREP(RISCV_IOMMU_CMD_IOTINVAL_PSCID, pscid) | RISCV_IOMMU_CMD_IOTINVAL_PSCV; } static inline void riscv_iommu_cmd_inval_set_gscid(struct riscv_iommu_command *cmd, int gscid) { cmd->dword0 |= FIELD_PREP(RISCV_IOMMU_CMD_IOTINVAL_GSCID, gscid) | RISCV_IOMMU_CMD_IOTINVAL_GV; } static inline void riscv_iommu_cmd_iofence(struct riscv_iommu_command *cmd) { cmd->dword0 = FIELD_PREP(RISCV_IOMMU_CMD_OPCODE, RISCV_IOMMU_CMD_IOFENCE_OPCODE) | FIELD_PREP(RISCV_IOMMU_CMD_FUNC, RISCV_IOMMU_CMD_IOFENCE_FUNC_C) | RISCV_IOMMU_CMD_IOFENCE_PR | RISCV_IOMMU_CMD_IOFENCE_PW; cmd->dword1 = 0; } static inline void riscv_iommu_cmd_iofence_set_av(struct riscv_iommu_command *cmd, u64 addr, u32 data) { cmd->dword0 = FIELD_PREP(RISCV_IOMMU_CMD_OPCODE, RISCV_IOMMU_CMD_IOFENCE_OPCODE) | FIELD_PREP(RISCV_IOMMU_CMD_FUNC, RISCV_IOMMU_CMD_IOFENCE_FUNC_C) | FIELD_PREP(RISCV_IOMMU_CMD_IOFENCE_DATA, data) | RISCV_IOMMU_CMD_IOFENCE_AV; cmd->dword1 = addr >> 2; } static inline void riscv_iommu_cmd_iodir_inval_ddt(struct riscv_iommu_command *cmd) { cmd->dword0 = FIELD_PREP(RISCV_IOMMU_CMD_OPCODE, RISCV_IOMMU_CMD_IODIR_OPCODE) | FIELD_PREP(RISCV_IOMMU_CMD_FUNC, RISCV_IOMMU_CMD_IODIR_FUNC_INVAL_DDT); cmd->dword1 = 0; } static inline void riscv_iommu_cmd_iodir_inval_pdt(struct riscv_iommu_command *cmd) { cmd->dword0 = FIELD_PREP(RISCV_IOMMU_CMD_OPCODE, RISCV_IOMMU_CMD_IODIR_OPCODE) | FIELD_PREP(RISCV_IOMMU_CMD_FUNC, RISCV_IOMMU_CMD_IODIR_FUNC_INVAL_PDT); cmd->dword1 = 0; } static inline void riscv_iommu_cmd_iodir_set_did(struct riscv_iommu_command *cmd, unsigned int devid) { cmd->dword0 |= FIELD_PREP(RISCV_IOMMU_CMD_IODIR_DID, devid) | RISCV_IOMMU_CMD_IODIR_DV; } static inline void riscv_iommu_cmd_iodir_set_pid(struct riscv_iommu_command *cmd, unsigned int pasid) { cmd->dword0 |= FIELD_PREP(RISCV_IOMMU_CMD_IODIR_PID, pasid); } #endif /* _RISCV_IOMMU_BITS_H_ */
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