linux/drivers/iommu/amd_iommu_types.h
<<
>>
Prefs
   1/*
   2 * Copyright (C) 2007-2010 Advanced Micro Devices, Inc.
   3 * Author: Joerg Roedel <joerg.roedel@amd.com>
   4 *         Leo Duran <leo.duran@amd.com>
   5 *
   6 * This program is free software; you can redistribute it and/or modify it
   7 * under the terms of the GNU General Public License version 2 as published
   8 * by the Free Software Foundation.
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program; if not, write to the Free Software
  17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  18 */
  19
  20#ifndef _ASM_X86_AMD_IOMMU_TYPES_H
  21#define _ASM_X86_AMD_IOMMU_TYPES_H
  22
  23#include <linux/types.h>
  24#include <linux/mutex.h>
  25#include <linux/list.h>
  26#include <linux/spinlock.h>
  27#include <linux/pci.h>
  28
  29/*
  30 * Maximum number of IOMMUs supported
  31 */
  32#define MAX_IOMMUS      32
  33
  34/*
  35 * some size calculation constants
  36 */
  37#define DEV_TABLE_ENTRY_SIZE            32
  38#define ALIAS_TABLE_ENTRY_SIZE          2
  39#define RLOOKUP_TABLE_ENTRY_SIZE        (sizeof(void *))
  40
  41/* Length of the MMIO region for the AMD IOMMU */
  42#define MMIO_REGION_LENGTH       0x4000
  43
  44/* Capability offsets used by the driver */
  45#define MMIO_CAP_HDR_OFFSET     0x00
  46#define MMIO_RANGE_OFFSET       0x0c
  47#define MMIO_MISC_OFFSET        0x10
  48
  49/* Masks, shifts and macros to parse the device range capability */
  50#define MMIO_RANGE_LD_MASK      0xff000000
  51#define MMIO_RANGE_FD_MASK      0x00ff0000
  52#define MMIO_RANGE_BUS_MASK     0x0000ff00
  53#define MMIO_RANGE_LD_SHIFT     24
  54#define MMIO_RANGE_FD_SHIFT     16
  55#define MMIO_RANGE_BUS_SHIFT    8
  56#define MMIO_GET_LD(x)  (((x) & MMIO_RANGE_LD_MASK) >> MMIO_RANGE_LD_SHIFT)
  57#define MMIO_GET_FD(x)  (((x) & MMIO_RANGE_FD_MASK) >> MMIO_RANGE_FD_SHIFT)
  58#define MMIO_GET_BUS(x) (((x) & MMIO_RANGE_BUS_MASK) >> MMIO_RANGE_BUS_SHIFT)
  59#define MMIO_MSI_NUM(x) ((x) & 0x1f)
  60
  61/* Flag masks for the AMD IOMMU exclusion range */
  62#define MMIO_EXCL_ENABLE_MASK 0x01ULL
  63#define MMIO_EXCL_ALLOW_MASK  0x02ULL
  64
  65/* Used offsets into the MMIO space */
  66#define MMIO_DEV_TABLE_OFFSET   0x0000
  67#define MMIO_CMD_BUF_OFFSET     0x0008
  68#define MMIO_EVT_BUF_OFFSET     0x0010
  69#define MMIO_CONTROL_OFFSET     0x0018
  70#define MMIO_EXCL_BASE_OFFSET   0x0020
  71#define MMIO_EXCL_LIMIT_OFFSET  0x0028
  72#define MMIO_EXT_FEATURES       0x0030
  73#define MMIO_PPR_LOG_OFFSET     0x0038
  74#define MMIO_CMD_HEAD_OFFSET    0x2000
  75#define MMIO_CMD_TAIL_OFFSET    0x2008
  76#define MMIO_EVT_HEAD_OFFSET    0x2010
  77#define MMIO_EVT_TAIL_OFFSET    0x2018
  78#define MMIO_STATUS_OFFSET      0x2020
  79#define MMIO_PPR_HEAD_OFFSET    0x2030
  80#define MMIO_PPR_TAIL_OFFSET    0x2038
  81
  82
  83/* Extended Feature Bits */
  84#define FEATURE_PREFETCH        (1ULL<<0)
  85#define FEATURE_PPR             (1ULL<<1)
  86#define FEATURE_X2APIC          (1ULL<<2)
  87#define FEATURE_NX              (1ULL<<3)
  88#define FEATURE_GT              (1ULL<<4)
  89#define FEATURE_IA              (1ULL<<6)
  90#define FEATURE_GA              (1ULL<<7)
  91#define FEATURE_HE              (1ULL<<8)
  92#define FEATURE_PC              (1ULL<<9)
  93
  94#define FEATURE_PASID_SHIFT     32
  95#define FEATURE_PASID_MASK      (0x1fULL << FEATURE_PASID_SHIFT)
  96
  97#define FEATURE_GLXVAL_SHIFT    14
  98#define FEATURE_GLXVAL_MASK     (0x03ULL << FEATURE_GLXVAL_SHIFT)
  99
 100#define PASID_MASK              0x000fffff
 101
 102/* MMIO status bits */
 103#define MMIO_STATUS_EVT_INT_MASK        (1 << 1)
 104#define MMIO_STATUS_COM_WAIT_INT_MASK   (1 << 2)
 105#define MMIO_STATUS_PPR_INT_MASK        (1 << 6)
 106
 107/* event logging constants */
 108#define EVENT_ENTRY_SIZE        0x10
 109#define EVENT_TYPE_SHIFT        28
 110#define EVENT_TYPE_MASK         0xf
 111#define EVENT_TYPE_ILL_DEV      0x1
 112#define EVENT_TYPE_IO_FAULT     0x2
 113#define EVENT_TYPE_DEV_TAB_ERR  0x3
 114#define EVENT_TYPE_PAGE_TAB_ERR 0x4
 115#define EVENT_TYPE_ILL_CMD      0x5
 116#define EVENT_TYPE_CMD_HARD_ERR 0x6
 117#define EVENT_TYPE_IOTLB_INV_TO 0x7
 118#define EVENT_TYPE_INV_DEV_REQ  0x8
 119#define EVENT_DEVID_MASK        0xffff
 120#define EVENT_DEVID_SHIFT       0
 121#define EVENT_DOMID_MASK        0xffff
 122#define EVENT_DOMID_SHIFT       0
 123#define EVENT_FLAGS_MASK        0xfff
 124#define EVENT_FLAGS_SHIFT       0x10
 125
 126/* feature control bits */
 127#define CONTROL_IOMMU_EN        0x00ULL
 128#define CONTROL_HT_TUN_EN       0x01ULL
 129#define CONTROL_EVT_LOG_EN      0x02ULL
 130#define CONTROL_EVT_INT_EN      0x03ULL
 131#define CONTROL_COMWAIT_EN      0x04ULL
 132#define CONTROL_INV_TIMEOUT     0x05ULL
 133#define CONTROL_PASSPW_EN       0x08ULL
 134#define CONTROL_RESPASSPW_EN    0x09ULL
 135#define CONTROL_COHERENT_EN     0x0aULL
 136#define CONTROL_ISOC_EN         0x0bULL
 137#define CONTROL_CMDBUF_EN       0x0cULL
 138#define CONTROL_PPFLOG_EN       0x0dULL
 139#define CONTROL_PPFINT_EN       0x0eULL
 140#define CONTROL_PPR_EN          0x0fULL
 141#define CONTROL_GT_EN           0x10ULL
 142
 143#define CTRL_INV_TO_MASK        (7 << CONTROL_INV_TIMEOUT)
 144#define CTRL_INV_TO_NONE        0
 145#define CTRL_INV_TO_1MS         1
 146#define CTRL_INV_TO_10MS        2
 147#define CTRL_INV_TO_100MS       3
 148#define CTRL_INV_TO_1S          4
 149#define CTRL_INV_TO_10S         5
 150#define CTRL_INV_TO_100S        6
 151
 152/* command specific defines */
 153#define CMD_COMPL_WAIT          0x01
 154#define CMD_INV_DEV_ENTRY       0x02
 155#define CMD_INV_IOMMU_PAGES     0x03
 156#define CMD_INV_IOTLB_PAGES     0x04
 157#define CMD_INV_IRT             0x05
 158#define CMD_COMPLETE_PPR        0x07
 159#define CMD_INV_ALL             0x08
 160
 161#define CMD_COMPL_WAIT_STORE_MASK       0x01
 162#define CMD_COMPL_WAIT_INT_MASK         0x02
 163#define CMD_INV_IOMMU_PAGES_SIZE_MASK   0x01
 164#define CMD_INV_IOMMU_PAGES_PDE_MASK    0x02
 165#define CMD_INV_IOMMU_PAGES_GN_MASK     0x04
 166
 167#define PPR_STATUS_MASK                 0xf
 168#define PPR_STATUS_SHIFT                12
 169
 170#define CMD_INV_IOMMU_ALL_PAGES_ADDRESS 0x7fffffffffffffffULL
 171
 172/* macros and definitions for device table entries */
 173#define DEV_ENTRY_VALID         0x00
 174#define DEV_ENTRY_TRANSLATION   0x01
 175#define DEV_ENTRY_IR            0x3d
 176#define DEV_ENTRY_IW            0x3e
 177#define DEV_ENTRY_NO_PAGE_FAULT 0x62
 178#define DEV_ENTRY_EX            0x67
 179#define DEV_ENTRY_SYSMGT1       0x68
 180#define DEV_ENTRY_SYSMGT2       0x69
 181#define DEV_ENTRY_IRQ_TBL_EN    0x80
 182#define DEV_ENTRY_INIT_PASS     0xb8
 183#define DEV_ENTRY_EINT_PASS     0xb9
 184#define DEV_ENTRY_NMI_PASS      0xba
 185#define DEV_ENTRY_LINT0_PASS    0xbe
 186#define DEV_ENTRY_LINT1_PASS    0xbf
 187#define DEV_ENTRY_MODE_MASK     0x07
 188#define DEV_ENTRY_MODE_SHIFT    0x09
 189
 190#define MAX_DEV_TABLE_ENTRIES   0xffff
 191
 192/* constants to configure the command buffer */
 193#define CMD_BUFFER_SIZE    8192
 194#define CMD_BUFFER_UNINITIALIZED 1
 195#define CMD_BUFFER_ENTRIES 512
 196#define MMIO_CMD_SIZE_SHIFT 56
 197#define MMIO_CMD_SIZE_512 (0x9ULL << MMIO_CMD_SIZE_SHIFT)
 198
 199/* constants for event buffer handling */
 200#define EVT_BUFFER_SIZE         8192 /* 512 entries */
 201#define EVT_LEN_MASK            (0x9ULL << 56)
 202
 203/* Constants for PPR Log handling */
 204#define PPR_LOG_ENTRIES         512
 205#define PPR_LOG_SIZE_SHIFT      56
 206#define PPR_LOG_SIZE_512        (0x9ULL << PPR_LOG_SIZE_SHIFT)
 207#define PPR_ENTRY_SIZE          16
 208#define PPR_LOG_SIZE            (PPR_ENTRY_SIZE * PPR_LOG_ENTRIES)
 209
 210#define PPR_REQ_TYPE(x)         (((x) >> 60) & 0xfULL)
 211#define PPR_FLAGS(x)            (((x) >> 48) & 0xfffULL)
 212#define PPR_DEVID(x)            ((x) & 0xffffULL)
 213#define PPR_TAG(x)              (((x) >> 32) & 0x3ffULL)
 214#define PPR_PASID1(x)           (((x) >> 16) & 0xffffULL)
 215#define PPR_PASID2(x)           (((x) >> 42) & 0xfULL)
 216#define PPR_PASID(x)            ((PPR_PASID2(x) << 16) | PPR_PASID1(x))
 217
 218#define PPR_REQ_FAULT           0x01
 219
 220#define PAGE_MODE_NONE    0x00
 221#define PAGE_MODE_1_LEVEL 0x01
 222#define PAGE_MODE_2_LEVEL 0x02
 223#define PAGE_MODE_3_LEVEL 0x03
 224#define PAGE_MODE_4_LEVEL 0x04
 225#define PAGE_MODE_5_LEVEL 0x05
 226#define PAGE_MODE_6_LEVEL 0x06
 227
 228#define PM_LEVEL_SHIFT(x)       (12 + ((x) * 9))
 229#define PM_LEVEL_SIZE(x)        (((x) < 6) ? \
 230                                  ((1ULL << PM_LEVEL_SHIFT((x))) - 1): \
 231                                   (0xffffffffffffffffULL))
 232#define PM_LEVEL_INDEX(x, a)    (((a) >> PM_LEVEL_SHIFT((x))) & 0x1ffULL)
 233#define PM_LEVEL_ENC(x)         (((x) << 9) & 0xe00ULL)
 234#define PM_LEVEL_PDE(x, a)      ((a) | PM_LEVEL_ENC((x)) | \
 235                                 IOMMU_PTE_P | IOMMU_PTE_IR | IOMMU_PTE_IW)
 236#define PM_PTE_LEVEL(pte)       (((pte) >> 9) & 0x7ULL)
 237
 238#define PM_MAP_4k               0
 239#define PM_ADDR_MASK            0x000ffffffffff000ULL
 240#define PM_MAP_MASK(lvl)        (PM_ADDR_MASK & \
 241                                (~((1ULL << (12 + ((lvl) * 9))) - 1)))
 242#define PM_ALIGNED(lvl, addr)   ((PM_MAP_MASK(lvl) & (addr)) == (addr))
 243
 244/*
 245 * Returns the page table level to use for a given page size
 246 * Pagesize is expected to be a power-of-two
 247 */
 248#define PAGE_SIZE_LEVEL(pagesize) \
 249                ((__ffs(pagesize) - 12) / 9)
 250/*
 251 * Returns the number of ptes to use for a given page size
 252 * Pagesize is expected to be a power-of-two
 253 */
 254#define PAGE_SIZE_PTE_COUNT(pagesize) \
 255                (1ULL << ((__ffs(pagesize) - 12) % 9))
 256
 257/*
 258 * Aligns a given io-virtual address to a given page size
 259 * Pagesize is expected to be a power-of-two
 260 */
 261#define PAGE_SIZE_ALIGN(address, pagesize) \
 262                ((address) & ~((pagesize) - 1))
 263/*
 264 * Creates an IOMMU PTE for an address and a given pagesize
 265 * The PTE has no permission bits set
 266 * Pagesize is expected to be a power-of-two larger than 4096
 267 */
 268#define PAGE_SIZE_PTE(address, pagesize)                \
 269                (((address) | ((pagesize) - 1)) &       \
 270                 (~(pagesize >> 1)) & PM_ADDR_MASK)
 271
 272/*
 273 * Takes a PTE value with mode=0x07 and returns the page size it maps
 274 */
 275#define PTE_PAGE_SIZE(pte) \
 276        (1ULL << (1 + ffz(((pte) | 0xfffULL))))
 277
 278#define IOMMU_PTE_P  (1ULL << 0)
 279#define IOMMU_PTE_TV (1ULL << 1)
 280#define IOMMU_PTE_U  (1ULL << 59)
 281#define IOMMU_PTE_FC (1ULL << 60)
 282#define IOMMU_PTE_IR (1ULL << 61)
 283#define IOMMU_PTE_IW (1ULL << 62)
 284
 285#define DTE_FLAG_IOTLB  (0x01UL << 32)
 286#define DTE_FLAG_GV     (0x01ULL << 55)
 287#define DTE_GLX_SHIFT   (56)
 288#define DTE_GLX_MASK    (3)
 289
 290#define DTE_GCR3_VAL_A(x)       (((x) >> 12) & 0x00007ULL)
 291#define DTE_GCR3_VAL_B(x)       (((x) >> 15) & 0x0ffffULL)
 292#define DTE_GCR3_VAL_C(x)       (((x) >> 31) & 0xfffffULL)
 293
 294#define DTE_GCR3_INDEX_A        0
 295#define DTE_GCR3_INDEX_B        1
 296#define DTE_GCR3_INDEX_C        1
 297
 298#define DTE_GCR3_SHIFT_A        58
 299#define DTE_GCR3_SHIFT_B        16
 300#define DTE_GCR3_SHIFT_C        43
 301
 302#define GCR3_VALID              0x01ULL
 303
 304#define IOMMU_PAGE_MASK (((1ULL << 52) - 1) & ~0xfffULL)
 305#define IOMMU_PTE_PRESENT(pte) ((pte) & IOMMU_PTE_P)
 306#define IOMMU_PTE_PAGE(pte) (phys_to_virt((pte) & IOMMU_PAGE_MASK))
 307#define IOMMU_PTE_MODE(pte) (((pte) >> 9) & 0x07)
 308
 309#define IOMMU_PROT_MASK 0x03
 310#define IOMMU_PROT_IR 0x01
 311#define IOMMU_PROT_IW 0x02
 312
 313/* IOMMU capabilities */
 314#define IOMMU_CAP_IOTLB   24
 315#define IOMMU_CAP_NPCACHE 26
 316#define IOMMU_CAP_EFR     27
 317
 318#define MAX_DOMAIN_ID 65536
 319
 320/* Protection domain flags */
 321#define PD_DMA_OPS_MASK         (1UL << 0) /* domain used for dma_ops */
 322#define PD_DEFAULT_MASK         (1UL << 1) /* domain is a default dma_ops
 323                                              domain for an IOMMU */
 324#define PD_PASSTHROUGH_MASK     (1UL << 2) /* domain has no page
 325                                              translation */
 326#define PD_IOMMUV2_MASK         (1UL << 3) /* domain has gcr3 table */
 327
 328extern bool amd_iommu_dump;
 329#define DUMP_printk(format, arg...)                                     \
 330        do {                                                            \
 331                if (amd_iommu_dump)                                             \
 332                        printk(KERN_INFO "AMD-Vi: " format, ## arg);    \
 333        } while(0);
 334
 335/* global flag if IOMMUs cache non-present entries */
 336extern bool amd_iommu_np_cache;
 337/* Only true if all IOMMUs support device IOTLBs */
 338extern bool amd_iommu_iotlb_sup;
 339
 340#define MAX_IRQS_PER_TABLE      256
 341#define IRQ_TABLE_ALIGNMENT     128
 342
 343struct irq_remap_table {
 344        spinlock_t lock;
 345        unsigned min_index;
 346        u32 *table;
 347};
 348
 349extern struct irq_remap_table **irq_lookup_table;
 350
 351/* Interrupt remapping feature used? */
 352extern bool amd_iommu_irq_remap;
 353
 354/* kmem_cache to get tables with 128 byte alignement */
 355extern struct kmem_cache *amd_iommu_irq_cache;
 356
 357/*
 358 * Make iterating over all IOMMUs easier
 359 */
 360#define for_each_iommu(iommu) \
 361        list_for_each_entry((iommu), &amd_iommu_list, list)
 362#define for_each_iommu_safe(iommu, next) \
 363        list_for_each_entry_safe((iommu), (next), &amd_iommu_list, list)
 364
 365#define APERTURE_RANGE_SHIFT    27      /* 128 MB */
 366#define APERTURE_RANGE_SIZE     (1ULL << APERTURE_RANGE_SHIFT)
 367#define APERTURE_RANGE_PAGES    (APERTURE_RANGE_SIZE >> PAGE_SHIFT)
 368#define APERTURE_MAX_RANGES     32      /* allows 4GB of DMA address space */
 369#define APERTURE_RANGE_INDEX(a) ((a) >> APERTURE_RANGE_SHIFT)
 370#define APERTURE_PAGE_INDEX(a)  (((a) >> 21) & 0x3fULL)
 371
 372
 373/*
 374 * This struct is used to pass information about
 375 * incoming PPR faults around.
 376 */
 377struct amd_iommu_fault {
 378        u64 address;    /* IO virtual address of the fault*/
 379        u32 pasid;      /* Address space identifier */
 380        u16 device_id;  /* Originating PCI device id */
 381        u16 tag;        /* PPR tag */
 382        u16 flags;      /* Fault flags */
 383
 384};
 385
 386#define PPR_FAULT_EXEC  (1 << 1)
 387#define PPR_FAULT_READ  (1 << 2)
 388#define PPR_FAULT_WRITE (1 << 5)
 389#define PPR_FAULT_USER  (1 << 6)
 390#define PPR_FAULT_RSVD  (1 << 7)
 391#define PPR_FAULT_GN    (1 << 8)
 392
 393struct iommu_domain;
 394
 395/*
 396 * This structure contains generic data for  IOMMU protection domains
 397 * independent of their use.
 398 */
 399struct protection_domain {
 400        struct list_head list;  /* for list of all protection domains */
 401        struct list_head dev_list; /* List of all devices in this domain */
 402        spinlock_t lock;        /* mostly used to lock the page table*/
 403        struct mutex api_lock;  /* protect page tables in the iommu-api path */
 404        u16 id;                 /* the domain id written to the device table */
 405        int mode;               /* paging mode (0-6 levels) */
 406        u64 *pt_root;           /* page table root pointer */
 407        int glx;                /* Number of levels for GCR3 table */
 408        u64 *gcr3_tbl;          /* Guest CR3 table */
 409        unsigned long flags;    /* flags to find out type of domain */
 410        bool updated;           /* complete domain flush required */
 411        unsigned dev_cnt;       /* devices assigned to this domain */
 412        unsigned dev_iommu[MAX_IOMMUS]; /* per-IOMMU reference count */
 413        void *priv;             /* private data */
 414        struct iommu_domain *iommu_domain; /* Pointer to generic
 415                                              domain structure */
 416
 417};
 418
 419/*
 420 * This struct contains device specific data for the IOMMU
 421 */
 422struct iommu_dev_data {
 423        struct list_head list;            /* For domain->dev_list */
 424        struct list_head dev_data_list;   /* For global dev_data_list */
 425        struct iommu_dev_data *alias_data;/* The alias dev_data */
 426        struct protection_domain *domain; /* Domain the device is bound to */
 427        atomic_t bind;                    /* Domain attach reference count */
 428        struct iommu_group *group;        /* IOMMU group for virtual aliases */
 429        u16 devid;                        /* PCI Device ID */
 430        bool iommu_v2;                    /* Device can make use of IOMMUv2 */
 431        bool passthrough;                 /* Default for device is pt_domain */
 432        struct {
 433                bool enabled;
 434                int qdep;
 435        } ats;                            /* ATS state */
 436        bool pri_tlp;                     /* PASID TLB required for
 437                                             PPR completions */
 438        u32 errata;                       /* Bitmap for errata to apply */
 439};
 440
 441/*
 442 * For dynamic growth the aperture size is split into ranges of 128MB of
 443 * DMA address space each. This struct represents one such range.
 444 */
 445struct aperture_range {
 446
 447        /* address allocation bitmap */
 448        unsigned long *bitmap;
 449
 450        /*
 451         * Array of PTE pages for the aperture. In this array we save all the
 452         * leaf pages of the domain page table used for the aperture. This way
 453         * we don't need to walk the page table to find a specific PTE. We can
 454         * just calculate its address in constant time.
 455         */
 456        u64 *pte_pages[64];
 457
 458        unsigned long offset;
 459};
 460
 461/*
 462 * Data container for a dma_ops specific protection domain
 463 */
 464struct dma_ops_domain {
 465        struct list_head list;
 466
 467        /* generic protection domain information */
 468        struct protection_domain domain;
 469
 470        /* size of the aperture for the mappings */
 471        unsigned long aperture_size;
 472
 473        /* address we start to search for free addresses */
 474        unsigned long next_address;
 475
 476        /* address space relevant data */
 477        struct aperture_range *aperture[APERTURE_MAX_RANGES];
 478
 479        /* This will be set to true when TLB needs to be flushed */
 480        bool need_flush;
 481
 482        /*
 483         * if this is a preallocated domain, keep the device for which it was
 484         * preallocated in this variable
 485         */
 486        u16 target_dev;
 487};
 488
 489/*
 490 * Structure where we save information about one hardware AMD IOMMU in the
 491 * system.
 492 */
 493struct amd_iommu {
 494        struct list_head list;
 495
 496        /* Index within the IOMMU array */
 497        int index;
 498
 499        /* locks the accesses to the hardware */
 500        spinlock_t lock;
 501
 502        /* Pointer to PCI device of this IOMMU */
 503        struct pci_dev *dev;
 504
 505        /* Cache pdev to root device for resume quirks */
 506        struct pci_dev *root_pdev;
 507
 508        /* physical address of MMIO space */
 509        u64 mmio_phys;
 510        /* virtual address of MMIO space */
 511        u8 __iomem *mmio_base;
 512
 513        /* capabilities of that IOMMU read from ACPI */
 514        u32 cap;
 515
 516        /* flags read from acpi table */
 517        u8 acpi_flags;
 518
 519        /* Extended features */
 520        u64 features;
 521
 522        /* IOMMUv2 */
 523        bool is_iommu_v2;
 524
 525        /* PCI device id of the IOMMU device */
 526        u16 devid;
 527
 528        /*
 529         * Capability pointer. There could be more than one IOMMU per PCI
 530         * device function if there are more than one AMD IOMMU capability
 531         * pointers.
 532         */
 533        u16 cap_ptr;
 534
 535        /* pci domain of this IOMMU */
 536        u16 pci_seg;
 537
 538        /* first device this IOMMU handles. read from PCI */
 539        u16 first_device;
 540        /* last device this IOMMU handles. read from PCI */
 541        u16 last_device;
 542
 543        /* start of exclusion range of that IOMMU */
 544        u64 exclusion_start;
 545        /* length of exclusion range of that IOMMU */
 546        u64 exclusion_length;
 547
 548        /* command buffer virtual address */
 549        u8 *cmd_buf;
 550        /* size of command buffer */
 551        u32 cmd_buf_size;
 552
 553        /* size of event buffer */
 554        u32 evt_buf_size;
 555        /* event buffer virtual address */
 556        u8 *evt_buf;
 557
 558        /* Base of the PPR log, if present */
 559        u8 *ppr_log;
 560
 561        /* true if interrupts for this IOMMU are already enabled */
 562        bool int_enabled;
 563
 564        /* if one, we need to send a completion wait command */
 565        bool need_sync;
 566
 567        /* default dma_ops domain for that IOMMU */
 568        struct dma_ops_domain *default_dom;
 569
 570        /*
 571         * We can't rely on the BIOS to restore all values on reinit, so we
 572         * need to stash them
 573         */
 574
 575        /* The iommu BAR */
 576        u32 stored_addr_lo;
 577        u32 stored_addr_hi;
 578
 579        /*
 580         * Each iommu has 6 l1s, each of which is documented as having 0x12
 581         * registers
 582         */
 583        u32 stored_l1[6][0x12];
 584
 585        /* The l2 indirect registers */
 586        u32 stored_l2[0x83];
 587};
 588
 589struct devid_map {
 590        struct list_head list;
 591        u8 id;
 592        u16 devid;
 593        bool cmd_line;
 594};
 595
 596/* Map HPET and IOAPIC ids to the devid used by the IOMMU */
 597extern struct list_head ioapic_map;
 598extern struct list_head hpet_map;
 599
 600/*
 601 * List with all IOMMUs in the system. This list is not locked because it is
 602 * only written and read at driver initialization or suspend time
 603 */
 604extern struct list_head amd_iommu_list;
 605
 606/*
 607 * Array with pointers to each IOMMU struct
 608 * The indices are referenced in the protection domains
 609 */
 610extern struct amd_iommu *amd_iommus[MAX_IOMMUS];
 611
 612/* Number of IOMMUs present in the system */
 613extern int amd_iommus_present;
 614
 615/*
 616 * Declarations for the global list of all protection domains
 617 */
 618extern spinlock_t amd_iommu_pd_lock;
 619extern struct list_head amd_iommu_pd_list;
 620
 621/*
 622 * Structure defining one entry in the device table
 623 */
 624struct dev_table_entry {
 625        u64 data[4];
 626};
 627
 628/*
 629 * One entry for unity mappings parsed out of the ACPI table.
 630 */
 631struct unity_map_entry {
 632        struct list_head list;
 633
 634        /* starting device id this entry is used for (including) */
 635        u16 devid_start;
 636        /* end device id this entry is used for (including) */
 637        u16 devid_end;
 638
 639        /* start address to unity map (including) */
 640        u64 address_start;
 641        /* end address to unity map (including) */
 642        u64 address_end;
 643
 644        /* required protection */
 645        int prot;
 646};
 647
 648/*
 649 * List of all unity mappings. It is not locked because as runtime it is only
 650 * read. It is created at ACPI table parsing time.
 651 */
 652extern struct list_head amd_iommu_unity_map;
 653
 654/*
 655 * Data structures for device handling
 656 */
 657
 658/*
 659 * Device table used by hardware. Read and write accesses by software are
 660 * locked with the amd_iommu_pd_table lock.
 661 */
 662extern struct dev_table_entry *amd_iommu_dev_table;
 663
 664/*
 665 * Alias table to find requestor ids to device ids. Not locked because only
 666 * read on runtime.
 667 */
 668extern u16 *amd_iommu_alias_table;
 669
 670/*
 671 * Reverse lookup table to find the IOMMU which translates a specific device.
 672 */
 673extern struct amd_iommu **amd_iommu_rlookup_table;
 674
 675/* size of the dma_ops aperture as power of 2 */
 676extern unsigned amd_iommu_aperture_order;
 677
 678/* largest PCI device id we expect translation requests for */
 679extern u16 amd_iommu_last_bdf;
 680
 681/* allocation bitmap for domain ids */
 682extern unsigned long *amd_iommu_pd_alloc_bitmap;
 683
 684/*
 685 * If true, the addresses will be flushed on unmap time, not when
 686 * they are reused
 687 */
 688extern u32 amd_iommu_unmap_flush;
 689
 690/* Smallest number of PASIDs supported by any IOMMU in the system */
 691extern u32 amd_iommu_max_pasids;
 692
 693extern bool amd_iommu_v2_present;
 694
 695extern bool amd_iommu_force_isolation;
 696
 697/* Max levels of glxval supported */
 698extern int amd_iommu_max_glx_val;
 699
 700/*
 701 * This function flushes all internal caches of
 702 * the IOMMU used by this driver.
 703 */
 704extern void iommu_flush_all_caches(struct amd_iommu *iommu);
 705
 706static inline int get_ioapic_devid(int id)
 707{
 708        struct devid_map *entry;
 709
 710        list_for_each_entry(entry, &ioapic_map, list) {
 711                if (entry->id == id)
 712                        return entry->devid;
 713        }
 714
 715        return -EINVAL;
 716}
 717
 718static inline int get_hpet_devid(int id)
 719{
 720        struct devid_map *entry;
 721
 722        list_for_each_entry(entry, &hpet_map, list) {
 723                if (entry->id == id)
 724                        return entry->devid;
 725        }
 726
 727        return -EINVAL;
 728}
 729
 730#ifdef CONFIG_AMD_IOMMU_STATS
 731
 732struct __iommu_counter {
 733        char *name;
 734        struct dentry *dent;
 735        u64 value;
 736};
 737
 738#define DECLARE_STATS_COUNTER(nm) \
 739        static struct __iommu_counter nm = {    \
 740                .name = #nm,                    \
 741        }
 742
 743#define INC_STATS_COUNTER(name)         name.value += 1
 744#define ADD_STATS_COUNTER(name, x)      name.value += (x)
 745#define SUB_STATS_COUNTER(name, x)      name.value -= (x)
 746
 747#else /* CONFIG_AMD_IOMMU_STATS */
 748
 749#define DECLARE_STATS_COUNTER(name)
 750#define INC_STATS_COUNTER(name)
 751#define ADD_STATS_COUNTER(name, x)
 752#define SUB_STATS_COUNTER(name, x)
 753
 754#endif /* CONFIG_AMD_IOMMU_STATS */
 755
 756#endif /* _ASM_X86_AMD_IOMMU_TYPES_H */
 757
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.