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[xen staging] xen/arm: smmuv3: Move definitions to a header



commit 19f609249a185cdc43132e4496bcfd96e371f293
Author:     Jean-Philippe Brucker <jean-philippe@xxxxxxxxxx>
AuthorDate: Tue Jan 11 12:33:43 2022 +0000
Commit:     Julien Grall <jgrall@xxxxxxxxxx>
CommitDate: Tue Sep 6 17:43:22 2022 +0100

    xen/arm: smmuv3: Move definitions to a header
    
    Backport Linux commit e881e7839fba. Also, move Xen related struct
    definition to header to get it compiled.
    
    Allow sharing structure definitions with the upcoming SVA support for
    Arm SMMUv3, by moving them to a separate header. We could surgically
    extract only what is needed but keeping all definitions in one place
    looks nicer.
    
    Signed-off-by: Jean-Philippe Brucker <jean-philippe@xxxxxxxxxx>
    Reviewed-by: Eric Auger <eric.auger@xxxxxxxxxx>
    Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
    Link: 
https://lore.kernel.org/r/20200918101852.582559-8-jean-philippe@xxxxxxxxxx
    Signed-off-by: Will Deacon <will@xxxxxxxxxx>
    Origin: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
e881e7839fba
    Signed-off-by: Rahul Singh <rahul.singh@xxxxxxx>
    Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 xen/drivers/passthrough/arm/smmu-v3.c | 665 +--------------------------------
 xen/drivers/passthrough/arm/smmu-v3.h | 674 ++++++++++++++++++++++++++++++++++
 2 files changed, 675 insertions(+), 664 deletions(-)

diff --git a/xen/drivers/passthrough/arm/smmu-v3.c 
b/xen/drivers/passthrough/arm/smmu-v3.c
index 229b9a4b0d..ba24a26ad6 100644
--- a/xen/drivers/passthrough/arm/smmu-v3.c
+++ b/xen/drivers/passthrough/arm/smmu-v3.c
@@ -90,6 +90,7 @@
 #include <asm/iommu_fwspec.h>
 #include <asm/platform.h>
 
+#include "smmu-v3.h"
 
 #define ARM_SMMU_VTCR_SH_IS            3
 #define ARM_SMMU_VTCR_RGN_WBWA         1
@@ -103,22 +104,12 @@
 #define ARM_SMMU_VTCR_PS_52_BIT                0x6ULL
 
 /* Linux compatibility functions. */
-typedef paddr_t                dma_addr_t;
-typedef paddr_t                phys_addr_t;
-typedef unsigned int           gfp_t;
-
 #define __iomb()               dmb(osh)
 
 #define platform_device                device
 
 #define GFP_KERNEL             0
 
-/* Alias to Xen lock functions */
-#define mutex spinlock
-#define mutex_init spin_lock_init
-#define mutex_lock spin_lock
-#define mutex_unlock spin_unlock
-
 /* Device logger functions */
 #define dev_name(dev)  dt_node_full_name(dev->of_node)
 #define dev_dbg(dev, fmt, ...)                 \
@@ -159,12 +150,6 @@ typedef unsigned int               gfp_t;
 #define readl_relaxed_poll_timeout(addr, val, cond, delay_us, timeout_us)      
\
        readx_poll_timeout(readl_relaxed, addr, val, cond, delay_us, timeout_us)
 
-#define FIELD_PREP(_mask, _val)                        \
-       (((typeof(_mask))(_val) << (ffs64(_mask) - 1)) & (_mask))
-
-#define FIELD_GET(_mask, _reg)                 \
-       ((typeof(_mask))(((_reg) & (_mask)) >> (ffs64(_mask) - 1)))
-
 /*
  * Helpers for DMA allocation. Just the function name is reused for
  * porting code, these allocation are not managed allocations
@@ -197,27 +182,6 @@ static void *dmam_alloc_coherent(struct device *dev, 
size_t size,
        return vaddr;
 }
 
-
-/* Xen specific code. */
-struct iommu_domain {
-       /* Runtime SMMU configuration for this iommu_domain */
-       atomic_t                ref;
-       /*
-        * Used to link iommu_domain contexts for a same domain.
-        * There is at least one per-SMMU to used by the domain.
-        */
-       struct list_head                list;
-};
-
-/* Describes information required for a Xen domain */
-struct arm_smmu_xen_domain {
-       spinlock_t              lock;
-
-       /* List of iommu domains associated to this domain */
-       struct list_head        contexts;
-};
-
-
 /* Keep a list of devices associated with this driver */
 static DEFINE_SPINLOCK(arm_smmu_devices_lock);
 static LIST_HEAD(arm_smmu_devices);
@@ -261,635 +225,8 @@ static int platform_get_irq_byname_optional(struct device 
*dev,
 }
 
 /* Start of Linux SMMUv3 code */
-/* 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_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                    (1U << 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                        0xfd
-
-#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             0x100a8
-#define ARM_SMMU_EVTQ_CONS             0x100ac
-#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             0x100c8
-#define ARM_SMMU_PRIQ_CONS             0x100cc
-#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_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_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_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_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)
-
-/* 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       100
-#define ARM_SMMU_CMDQ_SYNC_TIMEOUT_US  1000000 /* 1s! */
-#define ARM_SMMU_CMDQ_SYNC_SPIN_COUNT  10
-
 static bool disable_bypass = 1;
 
-enum pri_resp {
-       PRI_RESP_DENY = 0,
-       PRI_RESP_FAIL = 1,
-       PRI_RESP_SUCC = 2,
-};
-
-#ifdef CONFIG_MSI
-enum arm_smmu_msi_index {
-       EVTQ_MSI_INDEX,
-       GERROR_MSI_INDEX,
-       PRIQ_MSI_INDEX,
-       ARM_SMMU_MAX_MSIS,
-};
-
-static phys_addr_t arm_smmu_msi_cfg[ARM_SMMU_MAX_MSIS][3] = {
-       [EVTQ_MSI_INDEX] = {
-               ARM_SMMU_EVTQ_IRQ_CFG0,
-               ARM_SMMU_EVTQ_IRQ_CFG1,
-               ARM_SMMU_EVTQ_IRQ_CFG2,
-       },
-       [GERROR_MSI_INDEX] = {
-               ARM_SMMU_GERROR_IRQ_CFG0,
-               ARM_SMMU_GERROR_IRQ_CFG1,
-               ARM_SMMU_GERROR_IRQ_CFG2,
-       },
-       [PRIQ_MSI_INDEX] = {
-               ARM_SMMU_PRIQ_IRQ_CFG0,
-               ARM_SMMU_PRIQ_IRQ_CFG1,
-               ARM_SMMU_PRIQ_IRQ_CFG2,
-       },
-};
-#endif /* CONFIG_MSI */
-
-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;
-                       u8                      size;
-                       u64                     addr;
-               } prefetch;
-
-               #define CMDQ_OP_CFGI_STE        0x3
-               #define CMDQ_OP_CFGI_ALL        0x4
-               struct {
-                       u32                     sid;
-                       union {
-                               bool            leaf;
-                               u8              span;
-                       };
-               } cfgi;
-
-               #define CMDQ_OP_TLBI_EL2_ALL    0x20
-               #define CMDQ_OP_TLBI_S12_VMALL  0x28
-               #define CMDQ_OP_TLBI_S2_IPA     0x2a
-               #define CMDQ_OP_TLBI_NSNH_ALL   0x30
-               struct {
-                       u16                     asid;
-                       u16                     vmid;
-                       bool                    leaf;
-                       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_CMD_SYNC        0x46
-               struct {
-                       u32                     msidata;
-                       u64                     msiaddr;
-               } sync;
-       };
-};
-
-struct arm_smmu_ll_queue {
-       u32                             prod;
-       u32                             cons;
-       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_cmdq {
-       struct arm_smmu_queue           q;
-       spinlock_t                      lock;
-};
-
-struct arm_smmu_evtq {
-       struct arm_smmu_queue           q;
-       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_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;
-};
-
-struct arm_lpae_s2_cfg {
-       u64                     vttbr;
-       struct {
-               u32                     ps:3;
-               u32                     tg:2;
-               u32                     sh:2;
-               u32                     orgn:2;
-               u32                     irgn:2;
-               u32                     sl:2;
-               u32                     tsz:6;
-       } vtcr;
-};
-
-/* 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)
-       u32                             features;
-
-#define ARM_SMMU_OPT_SKIP_PREFETCH     (1 << 0)
-#define ARM_SMMU_OPT_PAGE0_REGS_ONLY   (1 << 1)
-       u32                             options;
-
-       struct arm_smmu_cmdq            cmdq;
-       struct arm_smmu_evtq            evtq;
-       struct arm_smmu_priq            priq;
-
-       int                             gerr_irq;
-       int                             combined_irq;
-       u32                             sync_nr;
-       u8                              prev_cmd_opcode;
-
-       unsigned long                   ias; /* IPA */
-       unsigned long                   oas; /* PA */
-       unsigned long                   pgsize_bitmap;
-
-#define ARM_SMMU_MAX_VMIDS             (1 << 16)
-       unsigned int                    vmid_bits;
-       DECLARE_BITMAP(vmid_map, ARM_SMMU_MAX_VMIDS);
-
-       unsigned int                    sid_bits;
-
-       struct arm_smmu_strtab_cfg      strtab_cfg;
-
-       /* Hi16xx adds an extra 32 bits of goodness to its MSI payload */
-       union {
-               u32                     sync_count;
-               u64                     padding;
-       };
-
-       /* Need to keep a list of SMMU devices */
-       struct list_head                devices;
-
-       /* Tasklets for handling evts/faults and pci page request IRQs*/
-       struct tasklet          evtq_irq_tasklet;
-       struct tasklet          priq_irq_tasklet;
-       struct tasklet          combined_irq_tasklet;
-};
-
-/* 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;
-       u32                             *sids;
-       unsigned int                    num_sids;
-       bool                            ats_enabled;
-};
-
-/* 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 */
-
-       bool                            non_strict;
-       atomic_t                        nr_ats_masters;
-
-       enum arm_smmu_domain_stage      stage;
-       struct arm_smmu_s2_cfg  s2_cfg;
-
-       /* Xen domain associated with this SMMU domain */
-       struct domain           *d;
-
-       struct iommu_domain             domain;
-
-       struct list_head                devices;
-       spinlock_t                      devices_lock;
-};
-
 struct arm_smmu_option_prop {
        u32 opt;
        const char *prop;
diff --git a/xen/drivers/passthrough/arm/smmu-v3.h 
b/xen/drivers/passthrough/arm/smmu-v3.h
new file mode 100644
index 0000000000..c45d2f16c4
--- /dev/null
+++ b/xen/drivers/passthrough/arm/smmu-v3.h
@@ -0,0 +1,674 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * IOMMU API for ARM architected SMMUv3 implementations.
+ *
+ * Copyright (C) 2022 ARM Limited
+ */
+
+#ifndef _ARM_SMMU_V3_H
+#define _ARM_SMMU_V3_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_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                        0xfd
+
+#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             0x100a8
+#define ARM_SMMU_EVTQ_CONS             0x100ac
+#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             0x100c8
+#define ARM_SMMU_PRIQ_CONS             0x100cc
+#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                        (1 << 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_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_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_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_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)
+
+/* 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       100
+#define ARM_SMMU_CMDQ_SYNC_TIMEOUT_US  1000000 /* 1s! */
+#define ARM_SMMU_CMDQ_SYNC_SPIN_COUNT  10
+
+#define FIELD_PREP(_mask, _val)                        \
+       (((typeof(_mask))(_val) << (ffs64(_mask) - 1)) & (_mask))
+
+#define FIELD_GET(_mask, _reg)                 \
+       ((typeof(_mask))(((_reg) & (_mask)) >> (ffs64(_mask) - 1)))
+
+/* Linux compatibility functions. */
+typedef paddr_t                dma_addr_t;
+typedef paddr_t                phys_addr_t;
+typedef unsigned int           gfp_t;
+
+/* Alias to Xen lock functions */
+#define mutex spinlock
+#define mutex_init spin_lock_init
+#define mutex_lock spin_lock
+#define mutex_unlock spin_unlock
+
+/* 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,
+};
+
+/* Xen specific code. */
+struct iommu_domain {
+       /* Runtime SMMU configuration for this iommu_domain */
+       atomic_t                ref;
+       /*
+        * Used to link iommu_domain contexts for a same domain.
+        * There is at least one per-SMMU to used by the domain.
+        */
+       struct list_head                list;
+};
+
+/* Describes information required for a Xen domain */
+struct arm_smmu_xen_domain {
+       spinlock_t              lock;
+
+       /* List of iommu domains associated to this domain */
+       struct list_head        contexts;
+};
+
+enum pri_resp {
+       PRI_RESP_DENY = 0,
+       PRI_RESP_FAIL = 1,
+       PRI_RESP_SUCC = 2,
+};
+
+#ifdef CONFIG_MSI
+enum arm_smmu_msi_index {
+       EVTQ_MSI_INDEX,
+       GERROR_MSI_INDEX,
+       PRIQ_MSI_INDEX,
+       ARM_SMMU_MAX_MSIS,
+};
+
+static phys_addr_t arm_smmu_msi_cfg[ARM_SMMU_MAX_MSIS][3] = {
+       [EVTQ_MSI_INDEX] = {
+               ARM_SMMU_EVTQ_IRQ_CFG0,
+               ARM_SMMU_EVTQ_IRQ_CFG1,
+               ARM_SMMU_EVTQ_IRQ_CFG2,
+       },
+       [GERROR_MSI_INDEX] = {
+               ARM_SMMU_GERROR_IRQ_CFG0,
+               ARM_SMMU_GERROR_IRQ_CFG1,
+               ARM_SMMU_GERROR_IRQ_CFG2,
+       },
+       [PRIQ_MSI_INDEX] = {
+               ARM_SMMU_PRIQ_IRQ_CFG0,
+               ARM_SMMU_PRIQ_IRQ_CFG1,
+               ARM_SMMU_PRIQ_IRQ_CFG2,
+       },
+};
+#endif /* CONFIG_MSI */
+
+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;
+                       u8                      size;
+                       u64                     addr;
+               } prefetch;
+
+               #define CMDQ_OP_CFGI_STE        0x3
+               #define CMDQ_OP_CFGI_ALL        0x4
+               struct {
+                       u32                     sid;
+                       union {
+                               bool            leaf;
+                               u8              span;
+                       };
+               } cfgi;
+
+               #define CMDQ_OP_TLBI_EL2_ALL    0x20
+               #define CMDQ_OP_TLBI_S12_VMALL  0x28
+               #define CMDQ_OP_TLBI_S2_IPA     0x2a
+               #define CMDQ_OP_TLBI_NSNH_ALL   0x30
+               struct {
+                       u16                     asid;
+                       u16                     vmid;
+                       bool                    leaf;
+                       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_CMD_SYNC        0x46
+               struct {
+                       u32                     msidata;
+                       u64                     msiaddr;
+               } sync;
+       };
+};
+
+struct arm_smmu_ll_queue {
+       u32                             prod;
+       u32                             cons;
+       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_cmdq {
+       struct arm_smmu_queue           q;
+       spinlock_t                      lock;
+};
+
+struct arm_smmu_evtq {
+       struct arm_smmu_queue           q;
+       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_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;
+};
+
+struct arm_lpae_s2_cfg {
+       u64                     vttbr;
+       struct {
+               u32                     ps:3;
+               u32                     tg:2;
+               u32                     sh:2;
+               u32                     orgn:2;
+               u32                     irgn:2;
+               u32                     sl:2;
+               u32                     tsz:6;
+       } vtcr;
+};
+
+/* 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)
+       u32                             features;
+
+#define ARM_SMMU_OPT_SKIP_PREFETCH     (1 << 0)
+#define ARM_SMMU_OPT_PAGE0_REGS_ONLY   (1 << 1)
+       u32                             options;
+
+       struct arm_smmu_cmdq            cmdq;
+       struct arm_smmu_evtq            evtq;
+       struct arm_smmu_priq            priq;
+
+       int                             gerr_irq;
+       int                             combined_irq;
+       u32                             sync_nr;
+       u8                              prev_cmd_opcode;
+
+       unsigned long                   ias; /* IPA */
+       unsigned long                   oas; /* PA */
+       unsigned long                   pgsize_bitmap;
+
+#define ARM_SMMU_MAX_VMIDS             (1 << 16)
+       unsigned int                    vmid_bits;
+       DECLARE_BITMAP(vmid_map, ARM_SMMU_MAX_VMIDS);
+
+       unsigned int                    sid_bits;
+
+       struct arm_smmu_strtab_cfg      strtab_cfg;
+
+       /* Hi16xx adds an extra 32 bits of goodness to its MSI payload */
+       union {
+               u32                     sync_count;
+               u64                     padding;
+       };
+
+       /* Need to keep a list of SMMU devices */
+       struct list_head                devices;
+
+       /* Tasklets for handling evts/faults and pci page request IRQs*/
+       struct tasklet          evtq_irq_tasklet;
+       struct tasklet          priq_irq_tasklet;
+       struct tasklet          combined_irq_tasklet;
+};
+
+/* 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;
+       u32                             *sids;
+       unsigned int                    num_sids;
+       bool                            ats_enabled;
+};
+
+struct arm_smmu_domain {
+       struct arm_smmu_device          *smmu;
+       struct mutex                    init_mutex; /* Protects smmu pointer */
+
+       bool                            non_strict;
+       atomic_t                        nr_ats_masters;
+
+       enum arm_smmu_domain_stage      stage;
+       struct arm_smmu_s2_cfg  s2_cfg;
+
+       /* Xen domain associated with this SMMU domain */
+       struct domain           *d;
+
+       struct iommu_domain             domain;
+
+       struct list_head                devices;
+       spinlock_t                      devices_lock;
+};
+
+#endif /* _ARM_SMMU_V3_H */
--
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