/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * IOMMU API for ARM architected SMMUv3 implementations.
 *
 * Copyright (C) 2015 ARM Limited
 */

#ifndef _ARM_SMMU_V3_H
#define _ARM_SMMU_V3_H

#include <linux/bitfield.h>
#include <linux/iommu.h>
#include <linux/kernel.h>
#include <linux/mmzone.h>
#include <linux/sizes.h>

/* MMIO registers */
#define ARM_SMMU_IDR0                   0x0
#define IDR0_ST_LVL                     GENMASK(28, 27)
#define IDR0_ST_LVL_2LVL                1
#define IDR0_STALL_MODEL                GENMASK(25, 24)
#define IDR0_STALL_MODEL_STALL          0
#define IDR0_STALL_MODEL_FORCE          2
#define IDR0_TTENDIAN                   GENMASK(22, 21)
#define IDR0_TTENDIAN_MIXED             0
#define IDR0_TTENDIAN_LE                2
#define IDR0_TTENDIAN_BE                3
#define IDR0_CD2L                       (1 << 19)
#define IDR0_VMID16                     (1 << 18)
#define IDR0_PRI                        (1 << 16)
#define IDR0_SEV                        (1 << 14)
#define IDR0_MSI                        (1 << 13)
#define IDR0_ASID16                     (1 << 12)
#define IDR0_ATS                        (1 << 10)
#define IDR0_HYP                        (1 << 9)
#define IDR0_COHACC                     (1 << 4)
#define IDR0_TTF                        GENMASK(3, 2)
#define IDR0_TTF_AARCH64                2
#define IDR0_TTF_AARCH32_64             3
#define IDR0_S1P                        (1 << 1)
#define IDR0_S2P                        (1 << 0)

#define ARM_SMMU_IDR1                   0x4
#define IDR1_TABLES_PRESET              (1 << 30)
#define IDR1_QUEUES_PRESET              (1 << 29)
#define IDR1_REL                        (1 << 28)
#define IDR1_CMDQS                      GENMASK(25, 21)
#define IDR1_EVTQS                      GENMASK(20, 16)
#define IDR1_PRIQS                      GENMASK(15, 11)
#define IDR1_SSIDSIZE                   GENMASK(10, 6)
#define IDR1_SIDSIZE                    GENMASK(5, 0)

#define ARM_SMMU_IDR3                   0xc
#define IDR3_RIL                        (1 << 10)

#define ARM_SMMU_IDR5                   0x14
#define IDR5_STALL_MAX                  GENMASK(31, 16)
#define IDR5_GRAN64K                    (1 << 6)
#define IDR5_GRAN16K                    (1 << 5)
#define IDR5_GRAN4K                     (1 << 4)
#define IDR5_OAS                        GENMASK(2, 0)
#define IDR5_OAS_32_BIT                 0
#define IDR5_OAS_36_BIT                 1
#define IDR5_OAS_40_BIT                 2
#define IDR5_OAS_42_BIT                 3
#define IDR5_OAS_44_BIT                 4
#define IDR5_OAS_48_BIT                 5
#define IDR5_OAS_52_BIT                 6
#define IDR5_VAX                        GENMASK(11, 10)
#define IDR5_VAX_52_BIT                 1

#define ARM_SMMU_CR0                    0x20
#define CR0_ATSCHK                      (1 << 4)
#define CR0_CMDQEN                      (1 << 3)
#define CR0_EVTQEN                      (1 << 2)
#define CR0_PRIQEN                      (1 << 1)
#define CR0_SMMUEN                      (1 << 0)

#define ARM_SMMU_CR0ACK                 0x24

#define ARM_SMMU_CR1                    0x28
#define CR1_TABLE_SH                    GENMASK(11, 10)
#define CR1_TABLE_OC                    GENMASK(9, 8)
#define CR1_TABLE_IC                    GENMASK(7, 6)
#define CR1_QUEUE_SH                    GENMASK(5, 4)
#define CR1_QUEUE_OC                    GENMASK(3, 2)
#define CR1_QUEUE_IC                    GENMASK(1, 0)
/* CR1 cacheability fields don't quite follow the usual TCR-style encoding */
#define CR1_CACHE_NC                    0
#define CR1_CACHE_WB                    1
#define CR1_CACHE_WT                    2

#define ARM_SMMU_CR2                    0x2c
#define CR2_PTM                         (1 << 2)
#define CR2_RECINVSID                   (1 << 1)
#define CR2_E2H                         (1 << 0)

#define ARM_SMMU_GBPA                   0x44
#define GBPA_UPDATE                     (1 << 31)
#define GBPA_ABORT                      (1 << 20)

#define ARM_SMMU_IRQ_CTRL               0x50
#define IRQ_CTRL_EVTQ_IRQEN             (1 << 2)
#define IRQ_CTRL_PRIQ_IRQEN             (1 << 1)
#define IRQ_CTRL_GERROR_IRQEN           (1 << 0)

#define ARM_SMMU_IRQ_CTRLACK            0x54

#define ARM_SMMU_GERROR                 0x60
#define GERROR_SFM_ERR                  (1 << 8)
#define GERROR_MSI_GERROR_ABT_ERR       (1 << 7)
#define GERROR_MSI_PRIQ_ABT_ERR         (1 << 6)
#define GERROR_MSI_EVTQ_ABT_ERR         (1 << 5)
#define GERROR_MSI_CMDQ_ABT_ERR         (1 << 4)
#define GERROR_PRIQ_ABT_ERR             (1 << 3)
#define GERROR_EVTQ_ABT_ERR             (1 << 2)
#define GERROR_CMDQ_ERR                 (1 << 0)
#define GERROR_ERR_MASK                 0x1fd

#define ARM_SMMU_GERRORN                0x64

#define ARM_SMMU_GERROR_IRQ_CFG0        0x68
#define ARM_SMMU_GERROR_IRQ_CFG1        0x70
#define ARM_SMMU_GERROR_IRQ_CFG2        0x74

#define ARM_SMMU_STRTAB_BASE            0x80
#define STRTAB_BASE_RA                  (1UL << 62)
#define STRTAB_BASE_ADDR_MASK           GENMASK_ULL(51, 6)

#define ARM_SMMU_STRTAB_BASE_CFG        0x88
#define STRTAB_BASE_CFG_FMT             GENMASK(17, 16)
#define STRTAB_BASE_CFG_FMT_LINEAR      0
#define STRTAB_BASE_CFG_FMT_2LVL        1
#define STRTAB_BASE_CFG_SPLIT           GENMASK(10, 6)
#define STRTAB_BASE_CFG_LOG2SIZE        GENMASK(5, 0)

#define ARM_SMMU_CMDQ_BASE              0x90
#define ARM_SMMU_CMDQ_PROD              0x98
#define ARM_SMMU_CMDQ_CONS              0x9c

#define ARM_SMMU_EVTQ_BASE              0xa0
#define ARM_SMMU_EVTQ_PROD              0xa8
#define ARM_SMMU_EVTQ_CONS              0xac
#define ARM_SMMU_EVTQ_IRQ_CFG0          0xb0
#define ARM_SMMU_EVTQ_IRQ_CFG1          0xb8
#define ARM_SMMU_EVTQ_IRQ_CFG2          0xbc

#define ARM_SMMU_PRIQ_BASE              0xc0
#define ARM_SMMU_PRIQ_PROD              0xc8
#define ARM_SMMU_PRIQ_CONS              0xcc
#define ARM_SMMU_PRIQ_IRQ_CFG0          0xd0
#define ARM_SMMU_PRIQ_IRQ_CFG1          0xd8
#define ARM_SMMU_PRIQ_IRQ_CFG2          0xdc

#define ARM_SMMU_REG_SZ                 0xe00

/* Common MSI config fields */
#define MSI_CFG0_ADDR_MASK              GENMASK_ULL(51, 2)
#define MSI_CFG2_SH                     GENMASK(5, 4)
#define MSI_CFG2_MEMATTR                GENMASK(3, 0)

/* Common memory attribute values */
#define ARM_SMMU_SH_NSH                 0
#define ARM_SMMU_SH_OSH                 2
#define ARM_SMMU_SH_ISH                 3
#define ARM_SMMU_MEMATTR_DEVICE_nGnRE   0x1
#define ARM_SMMU_MEMATTR_OIWB           0xf

#define Q_IDX(llq, p)                   ((p) & ((1 << (llq)->max_n_shift) - 1))
#define Q_WRP(llq, p)                   ((p) & (1 << (llq)->max_n_shift))
#define Q_OVERFLOW_FLAG                 (1U << 31)
#define Q_OVF(p)                        ((p) & Q_OVERFLOW_FLAG)
#define Q_ENT(q, p)                     ((q)->base +                    \
                                         Q_IDX(&((q)->llq), p) *        \
                                         (q)->ent_dwords)

#define Q_BASE_RWA                      (1UL << 62)
#define Q_BASE_ADDR_MASK                GENMASK_ULL(51, 5)
#define Q_BASE_LOG2SIZE                 GENMASK(4, 0)

/* Ensure DMA allocations are naturally aligned */
#ifdef CONFIG_CMA_ALIGNMENT
#define Q_MAX_SZ_SHIFT                  (PAGE_SHIFT + CONFIG_CMA_ALIGNMENT)
#else
#define Q_MAX_SZ_SHIFT                  (PAGE_SHIFT + MAX_ORDER - 1)
#endif

/*
 * Stream table.
 *
 * Linear: Enough to cover 1 << IDR1.SIDSIZE entries
 * 2lvl: 128k L1 entries,
 *       256 lazy entries per table (each table covers a PCI bus)
 */
#define STRTAB_L1_SZ_SHIFT              20
#define STRTAB_SPLIT                    8

#define STRTAB_L1_DESC_DWORDS           1
#define STRTAB_L1_DESC_SPAN             GENMASK_ULL(4, 0)
#define STRTAB_L1_DESC_L2PTR_MASK       GENMASK_ULL(51, 6)

#define STRTAB_STE_DWORDS               8
#define STRTAB_STE_0_V                  (1UL << 0)
#define STRTAB_STE_0_CFG                GENMASK_ULL(3, 1)
#define STRTAB_STE_0_CFG_ABORT          0
#define STRTAB_STE_0_CFG_BYPASS         4
#define STRTAB_STE_0_CFG_S1_TRANS       5
#define STRTAB_STE_0_CFG_S2_TRANS       6

#define STRTAB_STE_0_S1FMT              GENMASK_ULL(5, 4)
#define STRTAB_STE_0_S1FMT_LINEAR       0
#define STRTAB_STE_0_S1FMT_64K_L2       2
#define STRTAB_STE_0_S1CTXPTR_MASK      GENMASK_ULL(51, 6)
#define STRTAB_STE_0_S1CDMAX            GENMASK_ULL(63, 59)

#define STRTAB_STE_1_S1DSS              GENMASK_ULL(1, 0)
#define STRTAB_STE_1_S1DSS_TERMINATE    0x0
#define STRTAB_STE_1_S1DSS_BYPASS       0x1
#define STRTAB_STE_1_S1DSS_SSID0        0x2

#define STRTAB_STE_1_S1C_CACHE_NC       0UL
#define STRTAB_STE_1_S1C_CACHE_WBRA     1UL
#define STRTAB_STE_1_S1C_CACHE_WT       2UL
#define STRTAB_STE_1_S1C_CACHE_WB       3UL
#define STRTAB_STE_1_S1CIR              GENMASK_ULL(3, 2)
#define STRTAB_STE_1_S1COR              GENMASK_ULL(5, 4)
#define STRTAB_STE_1_S1CSH              GENMASK_ULL(7, 6)

#define STRTAB_STE_1_S1STALLD           (1UL << 27)

#define STRTAB_STE_1_EATS               GENMASK_ULL(29, 28)
#define STRTAB_STE_1_EATS_ABT           0UL
#define STRTAB_STE_1_EATS_TRANS         1UL
#define STRTAB_STE_1_EATS_S1CHK         2UL

#define STRTAB_STE_1_STRW               GENMASK_ULL(31, 30)
#define STRTAB_STE_1_STRW_NSEL1         0UL
#define STRTAB_STE_1_STRW_EL2           2UL

#define STRTAB_STE_1_SHCFG              GENMASK_ULL(45, 44)
#define STRTAB_STE_1_SHCFG_INCOMING     1UL

#define STRTAB_STE_2_S2VMID             GENMASK_ULL(15, 0)
#define STRTAB_STE_2_VTCR               GENMASK_ULL(50, 32)
#define STRTAB_STE_2_VTCR_S2T0SZ        GENMASK_ULL(5, 0)
#define STRTAB_STE_2_VTCR_S2SL0         GENMASK_ULL(7, 6)
#define STRTAB_STE_2_VTCR_S2IR0         GENMASK_ULL(9, 8)
#define STRTAB_STE_2_VTCR_S2OR0         GENMASK_ULL(11, 10)
#define STRTAB_STE_2_VTCR_S2SH0         GENMASK_ULL(13, 12)
#define STRTAB_STE_2_VTCR_S2TG          GENMASK_ULL(15, 14)
#define STRTAB_STE_2_VTCR_S2PS          GENMASK_ULL(18, 16)
#define STRTAB_STE_2_S2AA64             (1UL << 51)
#define STRTAB_STE_2_S2ENDI             (1UL << 52)
#define STRTAB_STE_2_S2PTW              (1UL << 54)
#define STRTAB_STE_2_S2R                (1UL << 58)

#define STRTAB_STE_3_S2TTB_MASK         GENMASK_ULL(51, 4)

/*
 * Context descriptors.
 *
 * Linear: when less than 1024 SSIDs are supported
 * 2lvl: at most 1024 L1 entries,
 *       1024 lazy entries per table.
 */
#define CTXDESC_SPLIT                   10
#define CTXDESC_L2_ENTRIES              (1 << CTXDESC_SPLIT)

#define CTXDESC_L1_DESC_DWORDS          1
#define CTXDESC_L1_DESC_V               (1UL << 0)
#define CTXDESC_L1_DESC_L2PTR_MASK      GENMASK_ULL(51, 12)

#define CTXDESC_CD_DWORDS               8
#define CTXDESC_CD_0_TCR_T0SZ           GENMASK_ULL(5, 0)
#define CTXDESC_CD_0_TCR_TG0            GENMASK_ULL(7, 6)
#define CTXDESC_CD_0_TCR_IRGN0          GENMASK_ULL(9, 8)
#define CTXDESC_CD_0_TCR_ORGN0          GENMASK_ULL(11, 10)
#define CTXDESC_CD_0_TCR_SH0            GENMASK_ULL(13, 12)
#define CTXDESC_CD_0_TCR_EPD0           (1ULL << 14)
#define CTXDESC_CD_0_TCR_EPD1           (1ULL << 30)

#define CTXDESC_CD_0_ENDI               (1UL << 15)
#define CTXDESC_CD_0_V                  (1UL << 31)

#define CTXDESC_CD_0_TCR_IPS            GENMASK_ULL(34, 32)
#define CTXDESC_CD_0_TCR_TBI0           (1ULL << 38)

#define CTXDESC_CD_0_AA64               (1UL << 41)
#define CTXDESC_CD_0_S                  (1UL << 44)
#define CTXDESC_CD_0_R                  (1UL << 45)
#define CTXDESC_CD_0_A                  (1UL << 46)
#define CTXDESC_CD_0_ASET               (1UL << 47)
#define CTXDESC_CD_0_ASID               GENMASK_ULL(63, 48)

#define CTXDESC_CD_1_TTB0_MASK          GENMASK_ULL(51, 4)

/*
 * When the SMMU only supports linear context descriptor tables, pick a
 * reasonable size limit (64kB).
 */
#define CTXDESC_LINEAR_CDMAX            ilog2(SZ_64K / (CTXDESC_CD_DWORDS << 3))

/* Command queue */
#define CMDQ_ENT_SZ_SHIFT               4
#define CMDQ_ENT_DWORDS                 ((1 << CMDQ_ENT_SZ_SHIFT) >> 3)
#define CMDQ_MAX_SZ_SHIFT               (Q_MAX_SZ_SHIFT - CMDQ_ENT_SZ_SHIFT)

#define CMDQ_CONS_ERR                   GENMASK(30, 24)
#define CMDQ_ERR_CERROR_NONE_IDX        0
#define CMDQ_ERR_CERROR_ILL_IDX         1
#define CMDQ_ERR_CERROR_ABT_IDX         2
#define CMDQ_ERR_CERROR_ATC_INV_IDX     3

#define CMDQ_PROD_OWNED_FLAG            Q_OVERFLOW_FLAG

/*
 * This is used to size the command queue and therefore must be at least
 * BITS_PER_LONG so that the valid_map works correctly (it relies on the
 * total number of queue entries being a multiple of BITS_PER_LONG).
 */
#define CMDQ_BATCH_ENTRIES              BITS_PER_LONG

#define CMDQ_0_OP                       GENMASK_ULL(7, 0)
#define CMDQ_0_SSV                      (1UL << 11)

#define CMDQ_PREFETCH_0_SID             GENMASK_ULL(63, 32)
#define CMDQ_PREFETCH_1_SIZE            GENMASK_ULL(4, 0)
#define CMDQ_PREFETCH_1_ADDR_MASK       GENMASK_ULL(63, 12)

#define CMDQ_CFGI_0_SSID                GENMASK_ULL(31, 12)
#define CMDQ_CFGI_0_SID                 GENMASK_ULL(63, 32)
#define CMDQ_CFGI_1_LEAF                (1UL << 0)
#define CMDQ_CFGI_1_RANGE               GENMASK_ULL(4, 0)

#define CMDQ_TLBI_0_NUM                 GENMASK_ULL(16, 12)
#define CMDQ_TLBI_RANGE_NUM_MAX         31
#define CMDQ_TLBI_0_SCALE               GENMASK_ULL(24, 20)
#define CMDQ_TLBI_0_VMID                GENMASK_ULL(47, 32)
#define CMDQ_TLBI_0_ASID                GENMASK_ULL(63, 48)
#define CMDQ_TLBI_1_LEAF                (1UL << 0)
#define CMDQ_TLBI_1_TTL                 GENMASK_ULL(9, 8)
#define CMDQ_TLBI_1_TG                  GENMASK_ULL(11, 10)
#define CMDQ_TLBI_1_VA_MASK             GENMASK_ULL(63, 12)
#define CMDQ_TLBI_1_IPA_MASK            GENMASK_ULL(51, 12)

#define CMDQ_ATC_0_SSID                 GENMASK_ULL(31, 12)
#define CMDQ_ATC_0_SID                  GENMASK_ULL(63, 32)
#define CMDQ_ATC_0_GLOBAL               (1UL << 9)
#define CMDQ_ATC_1_SIZE                 GENMASK_ULL(5, 0)
#define CMDQ_ATC_1_ADDR_MASK            GENMASK_ULL(63, 12)

#define CMDQ_PRI_0_SSID                 GENMASK_ULL(31, 12)
#define CMDQ_PRI_0_SID                  GENMASK_ULL(63, 32)
#define CMDQ_PRI_1_GRPID                GENMASK_ULL(8, 0)
#define CMDQ_PRI_1_RESP                 GENMASK_ULL(13, 12)

#define CMDQ_RESUME_0_RESP_TERM         0UL
#define CMDQ_RESUME_0_RESP_RETRY        1UL
#define CMDQ_RESUME_0_RESP_ABORT        2UL
#define CMDQ_RESUME_0_RESP              GENMASK_ULL(13, 12)
#define CMDQ_RESUME_0_SID               GENMASK_ULL(63, 32)
#define CMDQ_RESUME_1_STAG              GENMASK_ULL(15, 0)

#define CMDQ_SYNC_0_CS                  GENMASK_ULL(13, 12)
#define CMDQ_SYNC_0_CS_NONE             0
#define CMDQ_SYNC_0_CS_IRQ              1
#define CMDQ_SYNC_0_CS_SEV              2
#define CMDQ_SYNC_0_MSH                 GENMASK_ULL(23, 22)
#define CMDQ_SYNC_0_MSIATTR             GENMASK_ULL(27, 24)
#define CMDQ_SYNC_0_MSIDATA             GENMASK_ULL(63, 32)
#define CMDQ_SYNC_1_MSIADDR_MASK        GENMASK_ULL(51, 2)

/* Event queue */
#define EVTQ_ENT_SZ_SHIFT               5
#define EVTQ_ENT_DWORDS                 ((1 << EVTQ_ENT_SZ_SHIFT) >> 3)
#define EVTQ_MAX_SZ_SHIFT               (Q_MAX_SZ_SHIFT - EVTQ_ENT_SZ_SHIFT)

#define EVTQ_0_ID                       GENMASK_ULL(7, 0)

#define EVT_ID_TRANSLATION_FAULT        0x10
#define EVT_ID_ADDR_SIZE_FAULT          0x11
#define EVT_ID_ACCESS_FAULT             0x12
#define EVT_ID_PERMISSION_FAULT         0x13

#define EVTQ_0_SSV                      (1UL << 11)
#define EVTQ_0_SSID                     GENMASK_ULL(31, 12)
#define EVTQ_0_SID                      GENMASK_ULL(63, 32)
#define EVTQ_1_STAG                     GENMASK_ULL(15, 0)
#define EVTQ_1_STALL                    (1UL << 31)
#define EVTQ_1_PnU                      (1UL << 33)
#define EVTQ_1_InD                      (1UL << 34)
#define EVTQ_1_RnW                      (1UL << 35)
#define EVTQ_1_S2                       (1UL << 39)
#define EVTQ_1_CLASS                    GENMASK_ULL(41, 40)
#define EVTQ_1_TT_READ                  (1UL << 44)
#define EVTQ_2_ADDR                     GENMASK_ULL(63, 0)
#define EVTQ_3_IPA                      GENMASK_ULL(51, 12)

/* PRI queue */
#define PRIQ_ENT_SZ_SHIFT               4
#define PRIQ_ENT_DWORDS                 ((1 << PRIQ_ENT_SZ_SHIFT) >> 3)
#define PRIQ_MAX_SZ_SHIFT               (Q_MAX_SZ_SHIFT - PRIQ_ENT_SZ_SHIFT)

#define PRIQ_0_SID                      GENMASK_ULL(31, 0)
#define PRIQ_0_SSID                     GENMASK_ULL(51, 32)
#define PRIQ_0_PERM_PRIV                (1UL << 58)
#define PRIQ_0_PERM_EXEC                (1UL << 59)
#define PRIQ_0_PERM_READ                (1UL << 60)
#define PRIQ_0_PERM_WRITE               (1UL << 61)
#define PRIQ_0_PRG_LAST                 (1UL << 62)
#define PRIQ_0_SSID_V                   (1UL << 63)

#define PRIQ_1_PRG_IDX                  GENMASK_ULL(8, 0)
#define PRIQ_1_ADDR_MASK                GENMASK_ULL(63, 12)

/* High-level queue structures */
#define ARM_SMMU_POLL_TIMEOUT_US        1000000 /* 1s! */
#define ARM_SMMU_POLL_SPIN_COUNT        10

#define MSI_IOVA_BASE                   0x8000000
#define MSI_IOVA_LENGTH                 0x100000

enum pri_resp {
        PRI_RESP_DENY = 0,
        PRI_RESP_FAIL = 1,
        PRI_RESP_SUCC = 2,
};

struct arm_smmu_cmdq_ent {
        /* Common fields */
        u8                              opcode;
        bool                            substream_valid;

        /* Command-specific fields */
        union {
                #define CMDQ_OP_PREFETCH_CFG    0x1
                struct {
                        u32                     sid;
                } prefetch;

                #define CMDQ_OP_CFGI_STE        0x3
                #define CMDQ_OP_CFGI_ALL        0x4
                #define CMDQ_OP_CFGI_CD         0x5
                #define CMDQ_OP_CFGI_CD_ALL     0x6
                struct {
                        u32                     sid;
                        u32                     ssid;
                        union {
                                bool            leaf;
                                u8              span;
                        };
                } cfgi;

                #define CMDQ_OP_TLBI_NH_ASID    0x11
                #define CMDQ_OP_TLBI_NH_VA      0x12
                #define CMDQ_OP_TLBI_EL2_ALL    0x20
                #define CMDQ_OP_TLBI_EL2_ASID   0x21
                #define CMDQ_OP_TLBI_EL2_VA     0x22
                #define CMDQ_OP_TLBI_S12_VMALL  0x28
                #define CMDQ_OP_TLBI_S2_IPA     0x2a
                #define CMDQ_OP_TLBI_NSNH_ALL   0x30
                struct {
                        u8                      num;
                        u8                      scale;
                        u16                     asid;
                        u16                     vmid;
                        bool                    leaf;
                        u8                      ttl;
                        u8                      tg;
                        u64                     addr;
                } tlbi;

                #define CMDQ_OP_ATC_INV         0x40
                #define ATC_INV_SIZE_ALL        52
                struct {
                        u32                     sid;
                        u32                     ssid;
                        u64                     addr;
                        u8                      size;
                        bool                    global;
                } atc;

                #define CMDQ_OP_PRI_RESP        0x41
                struct {
                        u32                     sid;
                        u32                     ssid;
                        u16                     grpid;
                        enum pri_resp           resp;
                } pri;

                #define CMDQ_OP_RESUME          0x44
                struct {
                        u32                     sid;
                        u16                     stag;
                        u8                      resp;
                } resume;

                #define CMDQ_OP_CMD_SYNC        0x46
                struct {
                        u64                     msiaddr;
                } sync;
        };
};

struct arm_smmu_ll_queue {
        union {
                u64                     val;
                struct {
                        u32             prod;
                        u32             cons;
                };
                struct {
                        atomic_t        prod;
                        atomic_t        cons;
                } atomic;
                u8                      __pad[SMP_CACHE_BYTES];
        } ____cacheline_aligned_in_smp;
        u32                             max_n_shift;
};

struct arm_smmu_queue {
        struct arm_smmu_ll_queue        llq;
        int                             irq; /* Wired interrupt */

        __le64                          *base;
        dma_addr_t                      base_dma;
        u64                             q_base;

        size_t                          ent_dwords;

        u32 __iomem                     *prod_reg;
        u32 __iomem                     *cons_reg;
};

struct arm_smmu_queue_poll {
        ktime_t                         timeout;
        unsigned int                    delay;
        unsigned int                    spin_cnt;
        bool                            wfe;
};

struct arm_smmu_cmdq {
        struct arm_smmu_queue           q;
        atomic_long_t                   *valid_map;
        atomic_t                        owner_prod;
        atomic_t                        lock;
};

struct arm_smmu_cmdq_batch {
        u64                             cmds[CMDQ_BATCH_ENTRIES * CMDQ_ENT_DWORDS];
        int                             num;
};

struct arm_smmu_evtq {
        struct arm_smmu_queue           q;
        struct iopf_queue               *iopf;
        u32                             max_stalls;
};

struct arm_smmu_priq {
        struct arm_smmu_queue           q;
};

/* High-level stream table and context descriptor structures */
struct arm_smmu_strtab_l1_desc {
        u8                              span;

        __le64                          *l2ptr;
        dma_addr_t                      l2ptr_dma;
};

struct arm_smmu_ctx_desc {
        u16                             asid;
        u64                             ttbr;
        u64                             tcr;
        u64                             mair;

        refcount_t                      refs;
        struct mm_struct                *mm;
};

struct arm_smmu_l1_ctx_desc {
        __le64                          *l2ptr;
        dma_addr_t                      l2ptr_dma;
};

struct arm_smmu_ctx_desc_cfg {
        __le64                          *cdtab;
        dma_addr_t                      cdtab_dma;
        struct arm_smmu_l1_ctx_desc     *l1_desc;
        unsigned int                    num_l1_ents;
};

struct arm_smmu_s1_cfg {
        struct arm_smmu_ctx_desc_cfg    cdcfg;
        struct arm_smmu_ctx_desc        cd;
        u8                              s1fmt;
        u8                              s1cdmax;
};

struct arm_smmu_s2_cfg {
        u16                             vmid;
        u64                             vttbr;
        u64                             vtcr;
};

struct arm_smmu_strtab_cfg {
        __le64                          *strtab;
        dma_addr_t                      strtab_dma;
        struct arm_smmu_strtab_l1_desc  *l1_desc;
        unsigned int                    num_l1_ents;

        u64                             strtab_base;
        u32                             strtab_base_cfg;
};

/* An SMMUv3 instance */
struct arm_smmu_device {
        struct device                   *dev;
        void __iomem                    *base;
        void __iomem                    *page1;

#define ARM_SMMU_FEAT_2_LVL_STRTAB      (1 << 0)
#define ARM_SMMU_FEAT_2_LVL_CDTAB       (1 << 1)
#define ARM_SMMU_FEAT_TT_LE             (1 << 2)
#define ARM_SMMU_FEAT_TT_BE             (1 << 3)
#define ARM_SMMU_FEAT_PRI               (1 << 4)
#define ARM_SMMU_FEAT_ATS               (1 << 5)
#define ARM_SMMU_FEAT_SEV               (1 << 6)
#define ARM_SMMU_FEAT_MSI               (1 << 7)
#define ARM_SMMU_FEAT_COHERENCY         (1 << 8)
#define ARM_SMMU_FEAT_TRANS_S1          (1 << 9)
#define ARM_SMMU_FEAT_TRANS_S2          (1 << 10)
#define ARM_SMMU_FEAT_STALLS            (1 << 11)
#define ARM_SMMU_FEAT_HYP               (1 << 12)
#define ARM_SMMU_FEAT_STALL_FORCE       (1 << 13)
#define ARM_SMMU_FEAT_VAX               (1 << 14)
#define ARM_SMMU_FEAT_RANGE_INV         (1 << 15)
#define ARM_SMMU_FEAT_BTM               (1 << 16)
#define ARM_SMMU_FEAT_SVA               (1 << 17)
#define ARM_SMMU_FEAT_E2H               (1 << 18)
        u32                             features;

#define ARM_SMMU_OPT_SKIP_PREFETCH      (1 << 0)
#define ARM_SMMU_OPT_PAGE0_REGS_ONLY    (1 << 1)
#define ARM_SMMU_OPT_MSIPOLL            (1 << 2)
        u32                             options;

        struct arm_smmu_cmdq            cmdq;
        struct arm_smmu_evtq            evtq;
        struct arm_smmu_priq            priq;

        int                             gerr_irq;
        int                             combined_irq;

        unsigned long                   ias; /* IPA */
        unsigned long                   oas; /* PA */
        unsigned long                   pgsize_bitmap;

#define ARM_SMMU_MAX_ASIDS              (1 << 16)
        unsigned int                    asid_bits;

#define ARM_SMMU_MAX_VMIDS              (1 << 16)
        unsigned int                    vmid_bits;
        DECLARE_BITMAP(vmid_map, ARM_SMMU_MAX_VMIDS);

        unsigned int                    ssid_bits;
        unsigned int                    sid_bits;

        struct arm_smmu_strtab_cfg      strtab_cfg;

        /* IOMMU core code handle */
        struct iommu_device             iommu;

        struct rb_root                  streams;
        struct mutex                    streams_mutex;
};

struct arm_smmu_stream {
        u32                             id;
        struct arm_smmu_master          *master;
        struct rb_node                  node;
};

/* SMMU private data for each master */
struct arm_smmu_master {
        struct arm_smmu_device          *smmu;
        struct device                   *dev;
        struct arm_smmu_domain          *domain;
        struct list_head                domain_head;
        struct arm_smmu_stream          *streams;
        unsigned int                    num_streams;
        bool                            ats_enabled;
        bool                            stall_enabled;
        bool                            sva_enabled;
        bool                            iopf_enabled;
        struct list_head                bonds;
        unsigned int                    ssid_bits;
};

/* SMMU private data for an IOMMU domain */
enum arm_smmu_domain_stage {
        ARM_SMMU_DOMAIN_S1 = 0,
        ARM_SMMU_DOMAIN_S2,
        ARM_SMMU_DOMAIN_NESTED,
        ARM_SMMU_DOMAIN_BYPASS,
};

struct arm_smmu_domain {
        struct arm_smmu_device          *smmu;
        struct mutex                    init_mutex; /* Protects smmu pointer */

        struct io_pgtable_ops           *pgtbl_ops;
        bool                            stall_enabled;
        atomic_t                        nr_ats_masters;

        enum arm_smmu_domain_stage      stage;
        union {
                struct arm_smmu_s1_cfg  s1_cfg;
                struct arm_smmu_s2_cfg  s2_cfg;
        };

        struct iommu_domain             domain;

        struct list_head                devices;
        spinlock_t                      devices_lock;

        struct list_head                mmu_notifiers;
};

static inline struct arm_smmu_domain *to_smmu_domain(struct iommu_domain *dom)
{
        return container_of(dom, struct arm_smmu_domain, domain);
}

extern struct xarray arm_smmu_asid_xa;
extern struct mutex arm_smmu_asid_lock;
extern struct arm_smmu_ctx_desc quiet_cd;

int arm_smmu_write_ctx_desc(struct arm_smmu_domain *smmu_domain, int ssid,
                            struct arm_smmu_ctx_desc *cd);
void arm_smmu_tlb_inv_asid(struct arm_smmu_device *smmu, u16 asid);
void arm_smmu_tlb_inv_range_asid(unsigned long iova, size_t size, int asid,
                                 size_t granule, bool leaf,
                                 struct arm_smmu_domain *smmu_domain);
bool arm_smmu_free_asid(struct arm_smmu_ctx_desc *cd);
int arm_smmu_atc_inv_domain(struct arm_smmu_domain *smmu_domain, int ssid,
                            unsigned long iova, size_t size);

#ifdef CONFIG_ARM_SMMU_V3_SVA
bool arm_smmu_sva_supported(struct arm_smmu_device *smmu);
bool arm_smmu_master_sva_supported(struct arm_smmu_master *master);
bool arm_smmu_master_sva_enabled(struct arm_smmu_master *master);
int arm_smmu_master_enable_sva(struct arm_smmu_master *master);
int arm_smmu_master_disable_sva(struct arm_smmu_master *master);
bool arm_smmu_master_iopf_supported(struct arm_smmu_master *master);
struct iommu_sva *arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm,
                                    void *drvdata);
void arm_smmu_sva_unbind(struct iommu_sva *handle);
u32 arm_smmu_sva_get_pasid(struct iommu_sva *handle);
void arm_smmu_sva_notifier_synchronize(void);
#else /* CONFIG_ARM_SMMU_V3_SVA */
static inline bool arm_smmu_sva_supported(struct arm_smmu_device *smmu)
{
        return false;
}

static inline bool arm_smmu_master_sva_supported(struct arm_smmu_master *master)
{
        return false;
}

static inline bool arm_smmu_master_sva_enabled(struct arm_smmu_master *master)
{
        return false;
}

static inline int arm_smmu_master_enable_sva(struct arm_smmu_master *master)
{
        return -ENODEV;
}

static inline int arm_smmu_master_disable_sva(struct arm_smmu_master *master)
{
        return -ENODEV;
}

static inline bool arm_smmu_master_iopf_supported(struct arm_smmu_master *master)
{
        return false;
}

static inline struct iommu_sva *
arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm, void *drvdata)
{
        return ERR_PTR(-ENODEV);
}

static inline void arm_smmu_sva_unbind(struct iommu_sva *handle) {}

static inline u32 arm_smmu_sva_get_pasid(struct iommu_sva *handle)
{
        return IOMMU_PASID_INVALID;
}

static inline void arm_smmu_sva_notifier_synchronize(void) {}
#endif /* CONFIG_ARM_SMMU_V3_SVA */
#endif /* _ARM_SMMU_V3_H */