drivers/iommu/amd_iommu_types.h

   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 #include <linux/irqreturn.h>
  29
  30 /*
  31  * Maximum number of IOMMUs supported
  32  */
  33 #define MAX_IOMMUS      32
  34
  35 /*
  36  * some size calculation constants
  37  */
  38 #define DEV_TABLE_ENTRY_SIZE            32
  39 #define ALIAS_TABLE_ENTRY_SIZE          2
  40 #define RLOOKUP_TABLE_ENTRY_SIZE        (sizeof(void *))
  41
  42 /* Capability offsets used by the driver */
  43 #define MMIO_CAP_HDR_OFFSET     0x00
  44 #define MMIO_RANGE_OFFSET       0x0c
  45 #define MMIO_MISC_OFFSET        0x10
  46
  47 /* Masks, shifts and macros to parse the device range capability */
  48 #define MMIO_RANGE_LD_MASK      0xff000000
  49 #define MMIO_RANGE_FD_MASK      0x00ff0000
  50 #define MMIO_RANGE_BUS_MASK     0x0000ff00
  51 #define MMIO_RANGE_LD_SHIFT     24
  52 #define MMIO_RANGE_FD_SHIFT     16
  53 #define MMIO_RANGE_BUS_SHIFT    8
  54 #define MMIO_GET_LD(x)  (((x) & MMIO_RANGE_LD_MASK) >> MMIO_RANGE_LD_SHIFT)
  55 #define MMIO_GET_FD(x)  (((x) & MMIO_RANGE_FD_MASK) >> MMIO_RANGE_FD_SHIFT)
  56 #define MMIO_GET_BUS(x) (((x) & MMIO_RANGE_BUS_MASK) >> MMIO_RANGE_BUS_SHIFT)
  57 #define MMIO_MSI_NUM(x) ((x) & 0x1f)
  58
  59 /* Flag masks for the AMD IOMMU exclusion range */
  60 #define MMIO_EXCL_ENABLE_MASK 0x01ULL
  61 #define MMIO_EXCL_ALLOW_MASK  0x02ULL
  62
  63 /* Used offsets into the MMIO space */
  64 #define MMIO_DEV_TABLE_OFFSET   0x0000
  65 #define MMIO_CMD_BUF_OFFSET     0x0008
  66 #define MMIO_EVT_BUF_OFFSET     0x0010
  67 #define MMIO_CONTROL_OFFSET     0x0018
  68 #define MMIO_EXCL_BASE_OFFSET   0x0020
  69 #define MMIO_EXCL_LIMIT_OFFSET  0x0028
  70 #define MMIO_EXT_FEATURES       0x0030
  71 #define MMIO_PPR_LOG_OFFSET     0x0038
  72 #define MMIO_CMD_HEAD_OFFSET    0x2000
  73 #define MMIO_CMD_TAIL_OFFSET    0x2008
  74 #define MMIO_EVT_HEAD_OFFSET    0x2010
  75 #define MMIO_EVT_TAIL_OFFSET    0x2018
  76 #define MMIO_STATUS_OFFSET      0x2020
  77 #define MMIO_PPR_HEAD_OFFSET    0x2030
  78 #define MMIO_PPR_TAIL_OFFSET    0x2038
  79 #define MMIO_CNTR_CONF_OFFSET   0x4000
  80 #define MMIO_CNTR_REG_OFFSET    0x40000
  81 #define MMIO_REG_END_OFFSET     0x80000
  82
  83
  84
  85 /* Extended Feature Bits */
  86 #define FEATURE_PREFETCH        (1ULL<<0)
  87 #define FEATURE_PPR             (1ULL<<1)
  88 #define FEATURE_X2APIC          (1ULL<<2)
  89 #define FEATURE_NX              (1ULL<<3)
  90 #define FEATURE_GT              (1ULL<<4)
  91 #define FEATURE_IA              (1ULL<<6)
  92 #define FEATURE_GA              (1ULL<<7)
  93 #define FEATURE_HE              (1ULL<<8)
  94 #define FEATURE_PC              (1ULL<<9)
  95
  96 #define FEATURE_PASID_SHIFT     32
  97 #define FEATURE_PASID_MASK      (0x1fULL << FEATURE_PASID_SHIFT)
  98
  99 #define FEATURE_GLXVAL_SHIFT    14
 100 #define FEATURE_GLXVAL_MASK     (0x03ULL << FEATURE_GLXVAL_SHIFT)
 101
 102 /* Note:
 103  * The current driver only support 16-bit PASID.
 104  * Currently, hardware only implement upto 16-bit PASID
 105  * even though the spec says it could have upto 20 bits.
 106  */
 107 #define PASID_MASK              0x0000ffff
 108
 109 /* MMIO status bits */
 110 #define MMIO_STATUS_EVT_INT_MASK        (1 << 1)
 111 #define MMIO_STATUS_COM_WAIT_INT_MASK   (1 << 2)
 112 #define MMIO_STATUS_PPR_INT_MASK        (1 << 6)
 113
 114 /* event logging constants */
 115 #define EVENT_ENTRY_SIZE        0x10
 116 #define EVENT_TYPE_SHIFT        28
 117 #define EVENT_TYPE_MASK         0xf
 118 #define EVENT_TYPE_ILL_DEV      0x1
 119 #define EVENT_TYPE_IO_FAULT     0x2
 120 #define EVENT_TYPE_DEV_TAB_ERR  0x3
 121 #define EVENT_TYPE_PAGE_TAB_ERR 0x4
 122 #define EVENT_TYPE_ILL_CMD      0x5
 123 #define EVENT_TYPE_CMD_HARD_ERR 0x6
 124 #define EVENT_TYPE_IOTLB_INV_TO 0x7
 125 #define EVENT_TYPE_INV_DEV_REQ  0x8
 126 #define EVENT_DEVID_MASK        0xffff
 127 #define EVENT_DEVID_SHIFT       0
 128 #define EVENT_DOMID_MASK        0xffff
 129 #define EVENT_DOMID_SHIFT       0
 130 #define EVENT_FLAGS_MASK        0xfff
 131 #define EVENT_FLAGS_SHIFT       0x10
 132
 133 /* feature control bits */
 134 #define CONTROL_IOMMU_EN        0x00ULL
 135 #define CONTROL_HT_TUN_EN       0x01ULL
 136 #define CONTROL_EVT_LOG_EN      0x02ULL
 137 #define CONTROL_EVT_INT_EN      0x03ULL
 138 #define CONTROL_COMWAIT_EN      0x04ULL
 139 #define CONTROL_INV_TIMEOUT     0x05ULL
 140 #define CONTROL_PASSPW_EN       0x08ULL
 141 #define CONTROL_RESPASSPW_EN    0x09ULL
 142 #define CONTROL_COHERENT_EN     0x0aULL
 143 #define CONTROL_ISOC_EN         0x0bULL
 144 #define CONTROL_CMDBUF_EN       0x0cULL
 145 #define CONTROL_PPFLOG_EN       0x0dULL
 146 #define CONTROL_PPFINT_EN       0x0eULL
 147 #define CONTROL_PPR_EN          0x0fULL
 148 #define CONTROL_GT_EN           0x10ULL
 149
 150 #define CTRL_INV_TO_MASK        (7 << CONTROL_INV_TIMEOUT)
 151 #define CTRL_INV_TO_NONE        0
 152 #define CTRL_INV_TO_1MS         1
 153 #define CTRL_INV_TO_10MS        2
 154 #define CTRL_INV_TO_100MS       3
 155 #define CTRL_INV_TO_1S          4
 156 #define CTRL_INV_TO_10S         5
 157 #define CTRL_INV_TO_100S        6
 158
 159 /* command specific defines */
 160 #define CMD_COMPL_WAIT          0x01
 161 #define CMD_INV_DEV_ENTRY       0x02
 162 #define CMD_INV_IOMMU_PAGES     0x03
 163 #define CMD_INV_IOTLB_PAGES     0x04
 164 #define CMD_INV_IRT             0x05
 165 #define CMD_COMPLETE_PPR        0x07
 166 #define CMD_INV_ALL             0x08
 167
 168 #define CMD_COMPL_WAIT_STORE_MASK       0x01
 169 #define CMD_COMPL_WAIT_INT_MASK         0x02
 170 #define CMD_INV_IOMMU_PAGES_SIZE_MASK   0x01
 171 #define CMD_INV_IOMMU_PAGES_PDE_MASK    0x02
 172 #define CMD_INV_IOMMU_PAGES_GN_MASK     0x04
 173
 174 #define PPR_STATUS_MASK                 0xf
 175 #define PPR_STATUS_SHIFT                12
 176
 177 #define CMD_INV_IOMMU_ALL_PAGES_ADDRESS 0x7fffffffffffffffULL
 178
 179 /* macros and definitions for device table entries */
 180 #define DEV_ENTRY_VALID         0x00
 181 #define DEV_ENTRY_TRANSLATION   0x01
 182 #define DEV_ENTRY_IR            0x3d
 183 #define DEV_ENTRY_IW            0x3e
 184 #define DEV_ENTRY_NO_PAGE_FAULT 0x62
 185 #define DEV_ENTRY_EX            0x67
 186 #define DEV_ENTRY_SYSMGT1       0x68
 187 #define DEV_ENTRY_SYSMGT2       0x69
 188 #define DEV_ENTRY_IRQ_TBL_EN    0x80
 189 #define DEV_ENTRY_INIT_PASS     0xb8
 190 #define DEV_ENTRY_EINT_PASS     0xb9
 191 #define DEV_ENTRY_NMI_PASS      0xba
 192 #define DEV_ENTRY_LINT0_PASS    0xbe
 193 #define DEV_ENTRY_LINT1_PASS    0xbf
 194 #define DEV_ENTRY_MODE_MASK     0x07
 195 #define DEV_ENTRY_MODE_SHIFT    0x09
 196
 197 #define MAX_DEV_TABLE_ENTRIES   0xffff
 198
 199 /* constants to configure the command buffer */
 200 #define CMD_BUFFER_SIZE    8192
 201 #define CMD_BUFFER_UNINITIALIZED 1
 202 #define CMD_BUFFER_ENTRIES 512
 203 #define MMIO_CMD_SIZE_SHIFT 56
 204 #define MMIO_CMD_SIZE_512 (0x9ULL << MMIO_CMD_SIZE_SHIFT)
 205
 206 /* constants for event buffer handling */
 207 #define EVT_BUFFER_SIZE         8192 /* 512 entries */
 208 #define EVT_LEN_MASK            (0x9ULL << 56)
 209
 210 /* Constants for PPR Log handling */
 211 #define PPR_LOG_ENTRIES         512
 212 #define PPR_LOG_SIZE_SHIFT      56
 213 #define PPR_LOG_SIZE_512        (0x9ULL << PPR_LOG_SIZE_SHIFT)
 214 #define PPR_ENTRY_SIZE          16
 215 #define PPR_LOG_SIZE            (PPR_ENTRY_SIZE * PPR_LOG_ENTRIES)
 216
 217 #define PPR_REQ_TYPE(x)         (((x) >> 60) & 0xfULL)
 218 #define PPR_FLAGS(x)            (((x) >> 48) & 0xfffULL)
 219 #define PPR_DEVID(x)            ((x) & 0xffffULL)
 220 #define PPR_TAG(x)              (((x) >> 32) & 0x3ffULL)
 221 #define PPR_PASID1(x)           (((x) >> 16) & 0xffffULL)
 222 #define PPR_PASID2(x)           (((x) >> 42) & 0xfULL)
 223 #define PPR_PASID(x)            ((PPR_PASID2(x) << 16) | PPR_PASID1(x))
 224
 225 #define PPR_REQ_FAULT           0x01
 226
 227 #define PAGE_MODE_NONE    0x00
 228 #define PAGE_MODE_1_LEVEL 0x01
 229 #define PAGE_MODE_2_LEVEL 0x02
 230 #define PAGE_MODE_3_LEVEL 0x03
 231 #define PAGE_MODE_4_LEVEL 0x04
 232 #define PAGE_MODE_5_LEVEL 0x05
 233 #define PAGE_MODE_6_LEVEL 0x06
 234
 235 #define PM_LEVEL_SHIFT(x)       (12 + ((x) * 9))
 236 #define PM_LEVEL_SIZE(x)        (((x) < 6) ? \
 237                                   ((1ULL << PM_LEVEL_SHIFT((x))) - 1): \
 238                                    (0xffffffffffffffffULL))
 239 #define PM_LEVEL_INDEX(x, a)    (((a) >> PM_LEVEL_SHIFT((x))) & 0x1ffULL)
 240 #define PM_LEVEL_ENC(x)         (((x) << 9) & 0xe00ULL)
 241 #define PM_LEVEL_PDE(x, a)      ((a) | PM_LEVEL_ENC((x)) | \
 242                                  IOMMU_PTE_P | IOMMU_PTE_IR | IOMMU_PTE_IW)
 243 #define PM_PTE_LEVEL(pte)       (((pte) >> 9) & 0x7ULL)
 244
 245 #define PM_MAP_4k               0
 246 #define PM_ADDR_MASK            0x000ffffffffff000ULL
 247 #define PM_MAP_MASK(lvl)        (PM_ADDR_MASK & \
 248                                 (~((1ULL << (12 + ((lvl) * 9))) - 1)))
 249 #define PM_ALIGNED(lvl, addr)   ((PM_MAP_MASK(lvl) & (addr)) == (addr))
 250
 251 /*
 252  * Returns the page table level to use for a given page size
 253  * Pagesize is expected to be a power-of-two
 254  */
 255 #define PAGE_SIZE_LEVEL(pagesize) \
 256                 ((__ffs(pagesize) - 12) / 9)
 257 /*
 258  * Returns the number of ptes to use for a given page size
 259  * Pagesize is expected to be a power-of-two
 260  */
 261 #define PAGE_SIZE_PTE_COUNT(pagesize) \
 262                 (1ULL << ((__ffs(pagesize) - 12) % 9))
 263
 264 /*
 265  * Aligns a given io-virtual address to a given page size
 266  * Pagesize is expected to be a power-of-two
 267  */
 268 #define PAGE_SIZE_ALIGN(address, pagesize) \
 269                 ((address) & ~((pagesize) - 1))
 270 /*
 271  * Creates an IOMMU PTE for an address and a given pagesize
 272  * The PTE has no permission bits set
 273  * Pagesize is expected to be a power-of-two larger than 4096
 274  */
 275 #define PAGE_SIZE_PTE(address, pagesize)                \
 276                 (((address) | ((pagesize) - 1)) &       \
 277                  (~(pagesize >> 1)) & PM_ADDR_MASK)
 278
 279 /*
 280  * Takes a PTE value with mode=0x07 and returns the page size it maps
 281  */
 282 #define PTE_PAGE_SIZE(pte) \
 283         (1ULL << (1 + ffz(((pte) | 0xfffULL))))
 284
 285 #define IOMMU_PTE_P  (1ULL << 0)
 286 #define IOMMU_PTE_TV (1ULL << 1)
 287 #define IOMMU_PTE_U  (1ULL << 59)
 288 #define IOMMU_PTE_FC (1ULL << 60)
 289 #define IOMMU_PTE_IR (1ULL << 61)
 290 #define IOMMU_PTE_IW (1ULL << 62)
 291
 292 #define DTE_FLAG_IOTLB  (0x01UL << 32)
 293 #define DTE_FLAG_GV     (0x01ULL << 55)
 294 #define DTE_GLX_SHIFT   (56)
 295 #define DTE_GLX_MASK    (3)
 296
 297 #define DTE_GCR3_VAL_A(x)       (((x) >> 12) & 0x00007ULL)
 298 #define DTE_GCR3_VAL_B(x)       (((x) >> 15) & 0x0ffffULL)
 299 #define DTE_GCR3_VAL_C(x)       (((x) >> 31) & 0xfffffULL)
 300
 301 #define DTE_GCR3_INDEX_A        0
 302 #define DTE_GCR3_INDEX_B        1
 303 #define DTE_GCR3_INDEX_C        1
 304
 305 #define DTE_GCR3_SHIFT_A        58
 306 #define DTE_GCR3_SHIFT_B        16
 307 #define DTE_GCR3_SHIFT_C        43
 308
 309 #define GCR3_VALID              0x01ULL
 310
 311 #define IOMMU_PAGE_MASK (((1ULL << 52) - 1) & ~0xfffULL)
 312 #define IOMMU_PTE_PRESENT(pte) ((pte) & IOMMU_PTE_P)
 313 #define IOMMU_PTE_PAGE(pte) (phys_to_virt((pte) & IOMMU_PAGE_MASK))
 314 #define IOMMU_PTE_MODE(pte) (((pte) >> 9) & 0x07)
 315
 316 #define IOMMU_PROT_MASK 0x03
 317 #define IOMMU_PROT_IR 0x01
 318 #define IOMMU_PROT_IW 0x02
 319
 320 /* IOMMU capabilities */
 321 #define IOMMU_CAP_IOTLB   24
 322 #define IOMMU_CAP_NPCACHE 26
 323 #define IOMMU_CAP_EFR     27
 324
 325 #define MAX_DOMAIN_ID 65536
 326
 327 /* Protection domain flags */
 328 #define PD_DMA_OPS_MASK         (1UL << 0) /* domain used for dma_ops */
 329 #define PD_DEFAULT_MASK         (1UL << 1) /* domain is a default dma_ops
 330                                               domain for an IOMMU */
 331 #define PD_PASSTHROUGH_MASK     (1UL << 2) /* domain has no page
 332                                               translation */
 333 #define PD_IOMMUV2_MASK         (1UL << 3) /* domain has gcr3 table */
 334
 335 extern bool amd_iommu_dump;
 336 #define DUMP_printk(format, arg...)                                     \
 337         do {                                                            \
 338                 if (amd_iommu_dump)                                             \
 339                         printk(KERN_INFO "AMD-Vi: " format, ## arg);    \
 340         } while(0);
 341
 342 /* global flag if IOMMUs cache non-present entries */
 343 extern bool amd_iommu_np_cache;
 344 /* Only true if all IOMMUs support device IOTLBs */
 345 extern bool amd_iommu_iotlb_sup;
 346
 347 #define MAX_IRQS_PER_TABLE      256
 348 #define IRQ_TABLE_ALIGNMENT     128
 349
 350 struct irq_remap_table {
 351         spinlock_t lock;
 352         unsigned min_index;
 353         u32 *table;
 354 };
 355
 356 extern struct irq_remap_table **irq_lookup_table;
 357
 358 /* Interrupt remapping feature used? */
 359 extern bool amd_iommu_irq_remap;
 360
 361 /* kmem_cache to get tables with 128 byte alignement */
 362 extern struct kmem_cache *amd_iommu_irq_cache;
 363
 364 /*
 365  * Make iterating over all IOMMUs easier
 366  */
 367 #define for_each_iommu(iommu) \
 368         list_for_each_entry((iommu), &amd_iommu_list, list)
 369 #define for_each_iommu_safe(iommu, next) \
 370         list_for_each_entry_safe((iommu), (next), &amd_iommu_list, list)
 371
 372 #define APERTURE_RANGE_SHIFT    27      /* 128 MB */
 373 #define APERTURE_RANGE_SIZE     (1ULL << APERTURE_RANGE_SHIFT)
 374 #define APERTURE_RANGE_PAGES    (APERTURE_RANGE_SIZE >> PAGE_SHIFT)
 375 #define APERTURE_MAX_RANGES     32      /* allows 4GB of DMA address space */
 376 #define APERTURE_RANGE_INDEX(a) ((a) >> APERTURE_RANGE_SHIFT)
 377 #define APERTURE_PAGE_INDEX(a)  (((a) >> 21) & 0x3fULL)
 378
 379
 380 /*
 381  * This struct is used to pass information about
 382  * incoming PPR faults around.
 383  */
 384 struct amd_iommu_fault {
 385         u64 address;    /* IO virtual address of the fault*/
 386         u32 pasid;      /* Address space identifier */
 387         u16 device_id;  /* Originating PCI device id */
 388         u16 tag;        /* PPR tag */
 389         u16 flags;      /* Fault flags */
 390
 391 };
 392
 393
 394 struct iommu_domain;
 395
 396 /*
 397  * This structure contains generic data for  IOMMU protection domains
 398  * independent of their use.
 399  */
 400 struct protection_domain {
 401         struct list_head list;  /* for list of all protection domains */
 402         struct list_head dev_list; /* List of all devices in this domain */
 403         spinlock_t lock;        /* mostly used to lock the page table*/
 404         struct mutex api_lock;  /* protect page tables in the iommu-api path */
 405         u16 id;                 /* the domain id written to the device table */
 406         int mode;               /* paging mode (0-6 levels) */
 407         u64 *pt_root;           /* page table root pointer */
 408         int glx;                /* Number of levels for GCR3 table */
 409         u64 *gcr3_tbl;          /* Guest CR3 table */
 410         unsigned long flags;    /* flags to find out type of domain */
 411         bool updated;           /* complete domain flush required */
 412         unsigned dev_cnt;       /* devices assigned to this domain */
 413         unsigned dev_iommu[MAX_IOMMUS]; /* per-IOMMU reference count */
 414         void *priv;             /* private data */
 415         struct iommu_domain *iommu_domain; /* Pointer to generic
 416                                               domain structure */
 417
 418 };
 419
 420 /*
 421  * This struct contains device specific data for the IOMMU
 422  */
 423 struct iommu_dev_data {
 424         struct list_head list;            /* For domain->dev_list */
 425         struct list_head dev_data_list;   /* For global dev_data_list */
 426         struct iommu_dev_data *alias_data;/* The alias dev_data */
 427         struct protection_domain *domain; /* Domain the device is bound to */
 428         atomic_t bind;                    /* Domain attach reference count */
 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  */
 445 struct 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  */
 464 struct 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  */
 493 struct 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
 511         /* physical end address of MMIO space */
 512         u64 mmio_phys_end;
 513
 514         /* virtual address of MMIO space */
 515         u8 __iomem *mmio_base;
 516
 517         /* capabilities of that IOMMU read from ACPI */
 518         u32 cap;
 519
 520         /* flags read from acpi table */
 521         u8 acpi_flags;
 522
 523         /* Extended features */
 524         u64 features;
 525
 526         /* IOMMUv2 */
 527         bool is_iommu_v2;
 528
 529         /* PCI device id of the IOMMU device */
 530         u16 devid;
 531
 532         /*
 533          * Capability pointer. There could be more than one IOMMU per PCI
 534          * device function if there are more than one AMD IOMMU capability
 535          * pointers.
 536          */
 537         u16 cap_ptr;
 538
 539         /* pci domain of this IOMMU */
 540         u16 pci_seg;
 541
 542         /* first device this IOMMU handles. read from PCI */
 543         u16 first_device;
 544         /* last device this IOMMU handles. read from PCI */
 545         u16 last_device;
 546
 547         /* start of exclusion range of that IOMMU */
 548         u64 exclusion_start;
 549         /* length of exclusion range of that IOMMU */
 550         u64 exclusion_length;
 551
 552         /* command buffer virtual address */
 553         u8 *cmd_buf;
 554         /* size of command buffer */
 555         u32 cmd_buf_size;
 556
 557         /* size of event buffer */
 558         u32 evt_buf_size;
 559         /* event buffer virtual address */
 560         u8 *evt_buf;
 561
 562         /* Base of the PPR log, if present */
 563         u8 *ppr_log;
 564
 565         /* true if interrupts for this IOMMU are already enabled */
 566         bool int_enabled;
 567
 568         /* if one, we need to send a completion wait command */
 569         bool need_sync;
 570
 571         /* default dma_ops domain for that IOMMU */
 572         struct dma_ops_domain *default_dom;
 573
 574         /* IOMMU sysfs device */
 575         struct device *iommu_dev;
 576
 577         /*
 578          * We can't rely on the BIOS to restore all values on reinit, so we
 579          * need to stash them
 580          */
 581
 582         /* The iommu BAR */
 583         u32 stored_addr_lo;
 584         u32 stored_addr_hi;
 585
 586         /*
 587          * Each iommu has 6 l1s, each of which is documented as having 0x12
 588          * registers
 589          */
 590         u32 stored_l1[6][0x12];
 591
 592         /* The l2 indirect registers */
 593         u32 stored_l2[0x83];
 594
 595         /* The maximum PC banks and counters/bank (PCSup=1) */
 596         u8 max_banks;
 597         u8 max_counters;
 598 };
 599
 600 struct devid_map {
 601         struct list_head list;
 602         u8 id;
 603         u16 devid;
 604         bool cmd_line;
 605 };
 606
 607 /* Map HPET and IOAPIC ids to the devid used by the IOMMU */
 608 extern struct list_head ioapic_map;
 609 extern struct list_head hpet_map;
 610
 611 /*
 612  * List with all IOMMUs in the system. This list is not locked because it is
 613  * only written and read at driver initialization or suspend time
 614  */
 615 extern struct list_head amd_iommu_list;
 616
 617 /*
 618  * Array with pointers to each IOMMU struct
 619  * The indices are referenced in the protection domains
 620  */
 621 extern struct amd_iommu *amd_iommus[MAX_IOMMUS];
 622
 623 /* Number of IOMMUs present in the system */
 624 extern int amd_iommus_present;
 625
 626 /*
 627  * Declarations for the global list of all protection domains
 628  */
 629 extern spinlock_t amd_iommu_pd_lock;
 630 extern struct list_head amd_iommu_pd_list;
 631
 632 /*
 633  * Structure defining one entry in the device table
 634  */
 635 struct dev_table_entry {
 636         u64 data[4];
 637 };
 638
 639 /*
 640  * One entry for unity mappings parsed out of the ACPI table.
 641  */
 642 struct unity_map_entry {
 643         struct list_head list;
 644
 645         /* starting device id this entry is used for (including) */
 646         u16 devid_start;
 647         /* end device id this entry is used for (including) */
 648         u16 devid_end;
 649
 650         /* start address to unity map (including) */
 651         u64 address_start;
 652         /* end address to unity map (including) */
 653         u64 address_end;
 654
 655         /* required protection */
 656         int prot;
 657 };
 658
 659 /*
 660  * List of all unity mappings. It is not locked because as runtime it is only
 661  * read. It is created at ACPI table parsing time.
 662  */
 663 extern struct list_head amd_iommu_unity_map;
 664
 665 /*
 666  * Data structures for device handling
 667  */
 668
 669 /*
 670  * Device table used by hardware. Read and write accesses by software are
 671  * locked with the amd_iommu_pd_table lock.
 672  */
 673 extern struct dev_table_entry *amd_iommu_dev_table;
 674
 675 /*
 676  * Alias table to find requestor ids to device ids. Not locked because only
 677  * read on runtime.
 678  */
 679 extern u16 *amd_iommu_alias_table;
 680
 681 /*
 682  * Reverse lookup table to find the IOMMU which translates a specific device.
 683  */
 684 extern struct amd_iommu **amd_iommu_rlookup_table;
 685
 686 /* size of the dma_ops aperture as power of 2 */
 687 extern unsigned amd_iommu_aperture_order;
 688
 689 /* largest PCI device id we expect translation requests for */
 690 extern u16 amd_iommu_last_bdf;
 691
 692 /* allocation bitmap for domain ids */
 693 extern unsigned long *amd_iommu_pd_alloc_bitmap;
 694
 695 /*
 696  * If true, the addresses will be flushed on unmap time, not when
 697  * they are reused
 698  */
 699 extern u32 amd_iommu_unmap_flush;
 700
 701 /* Smallest max PASID supported by any IOMMU in the system */
 702 extern u32 amd_iommu_max_pasid;
 703
 704 extern bool amd_iommu_v2_present;
 705
 706 extern bool amd_iommu_force_isolation;
 707
 708 /* Max levels of glxval supported */
 709 extern int amd_iommu_max_glx_val;
 710
 711 /*
 712  * This function flushes all internal caches of
 713  * the IOMMU used by this driver.
 714  */
 715 extern void iommu_flush_all_caches(struct amd_iommu *iommu);
 716
 717 static inline int get_ioapic_devid(int id)
 718 {
 719         struct devid_map *entry;
 720
 721         list_for_each_entry(entry, &ioapic_map, list) {
 722                 if (entry->id == id)
 723                         return entry->devid;
 724         }
 725
 726         return -EINVAL;
 727 }
 728
 729 static inline int get_hpet_devid(int id)
 730 {
 731         struct devid_map *entry;
 732
 733         list_for_each_entry(entry, &hpet_map, list) {
 734                 if (entry->id == id)
 735                         return entry->devid;
 736         }
 737
 738         return -EINVAL;
 739 }
 740
 741 #ifdef CONFIG_AMD_IOMMU_STATS
 742
 743 struct __iommu_counter {
 744         char *name;
 745         struct dentry *dent;
 746         u64 value;
 747 };
 748
 749 #define DECLARE_STATS_COUNTER(nm) \
 750         static struct __iommu_counter nm = {    \
 751                 .name = #nm,                    \
 752         }
 753
 754 #define INC_STATS_COUNTER(name)         name.value += 1
 755 #define ADD_STATS_COUNTER(name, x)      name.value += (x)
 756 #define SUB_STATS_COUNTER(name, x)      name.value -= (x)
 757
 758 #else /* CONFIG_AMD_IOMMU_STATS */
 759
 760 #define DECLARE_STATS_COUNTER(name)
 761 #define INC_STATS_COUNTER(name)
 762 #define ADD_STATS_COUNTER(name, x)
 763 #define SUB_STATS_COUNTER(name, x)
 764
 765 #endif /* CONFIG_AMD_IOMMU_STATS */
 766
 767 #endif /* _ASM_X86_AMD_IOMMU_TYPES_H */