drivers/iommu/amd_iommu_types.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2007-2010 Advanced Micro Devices, Inc.
   4  * Author: Joerg Roedel <jroedel@suse.de>
   5  *         Leo Duran <leo.duran@amd.com>
   6  */
   7
   8 #ifndef _ASM_X86_AMD_IOMMU_TYPES_H
   9 #define _ASM_X86_AMD_IOMMU_TYPES_H
  10
  11 #include <linux/types.h>
  12 #include <linux/mutex.h>
  13 #include <linux/msi.h>
  14 #include <linux/list.h>
  15 #include <linux/spinlock.h>
  16 #include <linux/pci.h>
  17 #include <linux/irqreturn.h>
  18
  19 /*
  20  * Maximum number of IOMMUs supported
  21  */
  22 #define MAX_IOMMUS      32
  23
  24 /*
  25  * some size calculation constants
  26  */
  27 #define DEV_TABLE_ENTRY_SIZE            32
  28 #define ALIAS_TABLE_ENTRY_SIZE          2
  29 #define RLOOKUP_TABLE_ENTRY_SIZE        (sizeof(void *))
  30
  31 /* Capability offsets used by the driver */
  32 #define MMIO_CAP_HDR_OFFSET     0x00
  33 #define MMIO_RANGE_OFFSET       0x0c
  34 #define MMIO_MISC_OFFSET        0x10
  35
  36 /* Masks, shifts and macros to parse the device range capability */
  37 #define MMIO_RANGE_LD_MASK      0xff000000
  38 #define MMIO_RANGE_FD_MASK      0x00ff0000
  39 #define MMIO_RANGE_BUS_MASK     0x0000ff00
  40 #define MMIO_RANGE_LD_SHIFT     24
  41 #define MMIO_RANGE_FD_SHIFT     16
  42 #define MMIO_RANGE_BUS_SHIFT    8
  43 #define MMIO_GET_LD(x)  (((x) & MMIO_RANGE_LD_MASK) >> MMIO_RANGE_LD_SHIFT)
  44 #define MMIO_GET_FD(x)  (((x) & MMIO_RANGE_FD_MASK) >> MMIO_RANGE_FD_SHIFT)
  45 #define MMIO_GET_BUS(x) (((x) & MMIO_RANGE_BUS_MASK) >> MMIO_RANGE_BUS_SHIFT)
  46 #define MMIO_MSI_NUM(x) ((x) & 0x1f)
  47
  48 /* Flag masks for the AMD IOMMU exclusion range */
  49 #define MMIO_EXCL_ENABLE_MASK 0x01ULL
  50 #define MMIO_EXCL_ALLOW_MASK  0x02ULL
  51
  52 /* Used offsets into the MMIO space */
  53 #define MMIO_DEV_TABLE_OFFSET   0x0000
  54 #define MMIO_CMD_BUF_OFFSET     0x0008
  55 #define MMIO_EVT_BUF_OFFSET     0x0010
  56 #define MMIO_CONTROL_OFFSET     0x0018
  57 #define MMIO_EXCL_BASE_OFFSET   0x0020
  58 #define MMIO_EXCL_LIMIT_OFFSET  0x0028
  59 #define MMIO_EXT_FEATURES       0x0030
  60 #define MMIO_PPR_LOG_OFFSET     0x0038
  61 #define MMIO_GA_LOG_BASE_OFFSET 0x00e0
  62 #define MMIO_GA_LOG_TAIL_OFFSET 0x00e8
  63 #define MMIO_MSI_ADDR_LO_OFFSET 0x015C
  64 #define MMIO_MSI_ADDR_HI_OFFSET 0x0160
  65 #define MMIO_MSI_DATA_OFFSET    0x0164
  66 #define MMIO_INTCAPXT_EVT_OFFSET        0x0170
  67 #define MMIO_INTCAPXT_PPR_OFFSET        0x0178
  68 #define MMIO_INTCAPXT_GALOG_OFFSET      0x0180
  69 #define MMIO_CMD_HEAD_OFFSET    0x2000
  70 #define MMIO_CMD_TAIL_OFFSET    0x2008
  71 #define MMIO_EVT_HEAD_OFFSET    0x2010
  72 #define MMIO_EVT_TAIL_OFFSET    0x2018
  73 #define MMIO_STATUS_OFFSET      0x2020
  74 #define MMIO_PPR_HEAD_OFFSET    0x2030
  75 #define MMIO_PPR_TAIL_OFFSET    0x2038
  76 #define MMIO_GA_HEAD_OFFSET     0x2040
  77 #define MMIO_GA_TAIL_OFFSET     0x2048
  78 #define MMIO_CNTR_CONF_OFFSET   0x4000
  79 #define MMIO_CNTR_REG_OFFSET    0x40000
  80 #define MMIO_REG_END_OFFSET     0x80000
  81
  82
  83
  84 /* Extended Feature Bits */
  85 #define FEATURE_PREFETCH        (1ULL<<0)
  86 #define FEATURE_PPR             (1ULL<<1)
  87 #define FEATURE_X2APIC          (1ULL<<2)
  88 #define FEATURE_NX              (1ULL<<3)
  89 #define FEATURE_GT              (1ULL<<4)
  90 #define FEATURE_IA              (1ULL<<6)
  91 #define FEATURE_GA              (1ULL<<7)
  92 #define FEATURE_HE              (1ULL<<8)
  93 #define FEATURE_PC              (1ULL<<9)
  94 #define FEATURE_GAM_VAPIC       (1ULL<<21)
  95 #define FEATURE_EPHSUP          (1ULL<<50)
  96
  97 #define FEATURE_PASID_SHIFT     32
  98 #define FEATURE_PASID_MASK      (0x1fULL << FEATURE_PASID_SHIFT)
  99
 100 #define FEATURE_GLXVAL_SHIFT    14
 101 #define FEATURE_GLXVAL_MASK     (0x03ULL << FEATURE_GLXVAL_SHIFT)
 102
 103 /* Note:
 104  * The current driver only support 16-bit PASID.
 105  * Currently, hardware only implement upto 16-bit PASID
 106  * even though the spec says it could have upto 20 bits.
 107  */
 108 #define PASID_MASK              0x0000ffff
 109
 110 /* MMIO status bits */
 111 #define MMIO_STATUS_EVT_INT_MASK        (1 << 1)
 112 #define MMIO_STATUS_COM_WAIT_INT_MASK   (1 << 2)
 113 #define MMIO_STATUS_PPR_INT_MASK        (1 << 6)
 114 #define MMIO_STATUS_GALOG_RUN_MASK      (1 << 8)
 115 #define MMIO_STATUS_GALOG_OVERFLOW_MASK (1 << 9)
 116 #define MMIO_STATUS_GALOG_INT_MASK      (1 << 10)
 117
 118 /* event logging constants */
 119 #define EVENT_ENTRY_SIZE        0x10
 120 #define EVENT_TYPE_SHIFT        28
 121 #define EVENT_TYPE_MASK         0xf
 122 #define EVENT_TYPE_ILL_DEV      0x1
 123 #define EVENT_TYPE_IO_FAULT     0x2
 124 #define EVENT_TYPE_DEV_TAB_ERR  0x3
 125 #define EVENT_TYPE_PAGE_TAB_ERR 0x4
 126 #define EVENT_TYPE_ILL_CMD      0x5
 127 #define EVENT_TYPE_CMD_HARD_ERR 0x6
 128 #define EVENT_TYPE_IOTLB_INV_TO 0x7
 129 #define EVENT_TYPE_INV_DEV_REQ  0x8
 130 #define EVENT_TYPE_INV_PPR_REQ  0x9
 131 #define EVENT_DEVID_MASK        0xffff
 132 #define EVENT_DEVID_SHIFT       0
 133 #define EVENT_DOMID_MASK_LO     0xffff
 134 #define EVENT_DOMID_MASK_HI     0xf0000
 135 #define EVENT_FLAGS_MASK        0xfff
 136 #define EVENT_FLAGS_SHIFT       0x10
 137
 138 /* feature control bits */
 139 #define CONTROL_IOMMU_EN        0x00ULL
 140 #define CONTROL_HT_TUN_EN       0x01ULL
 141 #define CONTROL_EVT_LOG_EN      0x02ULL
 142 #define CONTROL_EVT_INT_EN      0x03ULL
 143 #define CONTROL_COMWAIT_EN      0x04ULL
 144 #define CONTROL_INV_TIMEOUT     0x05ULL
 145 #define CONTROL_PASSPW_EN       0x08ULL
 146 #define CONTROL_RESPASSPW_EN    0x09ULL
 147 #define CONTROL_COHERENT_EN     0x0aULL
 148 #define CONTROL_ISOC_EN         0x0bULL
 149 #define CONTROL_CMDBUF_EN       0x0cULL
 150 #define CONTROL_PPRLOG_EN       0x0dULL
 151 #define CONTROL_PPRINT_EN       0x0eULL
 152 #define CONTROL_PPR_EN          0x0fULL
 153 #define CONTROL_GT_EN           0x10ULL
 154 #define CONTROL_GA_EN           0x11ULL
 155 #define CONTROL_GAM_EN          0x19ULL
 156 #define CONTROL_GALOG_EN        0x1CULL
 157 #define CONTROL_GAINT_EN        0x1DULL
 158 #define CONTROL_XT_EN           0x32ULL
 159 #define CONTROL_INTCAPXT_EN     0x33ULL
 160
 161 #define CTRL_INV_TO_MASK        (7 << CONTROL_INV_TIMEOUT)
 162 #define CTRL_INV_TO_NONE        0
 163 #define CTRL_INV_TO_1MS         1
 164 #define CTRL_INV_TO_10MS        2
 165 #define CTRL_INV_TO_100MS       3
 166 #define CTRL_INV_TO_1S          4
 167 #define CTRL_INV_TO_10S         5
 168 #define CTRL_INV_TO_100S        6
 169
 170 /* command specific defines */
 171 #define CMD_COMPL_WAIT          0x01
 172 #define CMD_INV_DEV_ENTRY       0x02
 173 #define CMD_INV_IOMMU_PAGES     0x03
 174 #define CMD_INV_IOTLB_PAGES     0x04
 175 #define CMD_INV_IRT             0x05
 176 #define CMD_COMPLETE_PPR        0x07
 177 #define CMD_INV_ALL             0x08
 178
 179 #define CMD_COMPL_WAIT_STORE_MASK       0x01
 180 #define CMD_COMPL_WAIT_INT_MASK         0x02
 181 #define CMD_INV_IOMMU_PAGES_SIZE_MASK   0x01
 182 #define CMD_INV_IOMMU_PAGES_PDE_MASK    0x02
 183 #define CMD_INV_IOMMU_PAGES_GN_MASK     0x04
 184
 185 #define PPR_STATUS_MASK                 0xf
 186 #define PPR_STATUS_SHIFT                12
 187
 188 #define CMD_INV_IOMMU_ALL_PAGES_ADDRESS 0x7fffffffffffffffULL
 189
 190 /* macros and definitions for device table entries */
 191 #define DEV_ENTRY_VALID         0x00
 192 #define DEV_ENTRY_TRANSLATION   0x01
 193 #define DEV_ENTRY_PPR           0x34
 194 #define DEV_ENTRY_IR            0x3d
 195 #define DEV_ENTRY_IW            0x3e
 196 #define DEV_ENTRY_NO_PAGE_FAULT 0x62
 197 #define DEV_ENTRY_EX            0x67
 198 #define DEV_ENTRY_SYSMGT1       0x68
 199 #define DEV_ENTRY_SYSMGT2       0x69
 200 #define DEV_ENTRY_IRQ_TBL_EN    0x80
 201 #define DEV_ENTRY_INIT_PASS     0xb8
 202 #define DEV_ENTRY_EINT_PASS     0xb9
 203 #define DEV_ENTRY_NMI_PASS      0xba
 204 #define DEV_ENTRY_LINT0_PASS    0xbe
 205 #define DEV_ENTRY_LINT1_PASS    0xbf
 206 #define DEV_ENTRY_MODE_MASK     0x07
 207 #define DEV_ENTRY_MODE_SHIFT    0x09
 208
 209 #define MAX_DEV_TABLE_ENTRIES   0xffff
 210
 211 /* constants to configure the command buffer */
 212 #define CMD_BUFFER_SIZE    8192
 213 #define CMD_BUFFER_UNINITIALIZED 1
 214 #define CMD_BUFFER_ENTRIES 512
 215 #define MMIO_CMD_SIZE_SHIFT 56
 216 #define MMIO_CMD_SIZE_512 (0x9ULL << MMIO_CMD_SIZE_SHIFT)
 217
 218 /* constants for event buffer handling */
 219 #define EVT_BUFFER_SIZE         8192 /* 512 entries */
 220 #define EVT_LEN_MASK            (0x9ULL << 56)
 221
 222 /* Constants for PPR Log handling */
 223 #define PPR_LOG_ENTRIES         512
 224 #define PPR_LOG_SIZE_SHIFT      56
 225 #define PPR_LOG_SIZE_512        (0x9ULL << PPR_LOG_SIZE_SHIFT)
 226 #define PPR_ENTRY_SIZE          16
 227 #define PPR_LOG_SIZE            (PPR_ENTRY_SIZE * PPR_LOG_ENTRIES)
 228
 229 #define PPR_REQ_TYPE(x)         (((x) >> 60) & 0xfULL)
 230 #define PPR_FLAGS(x)            (((x) >> 48) & 0xfffULL)
 231 #define PPR_DEVID(x)            ((x) & 0xffffULL)
 232 #define PPR_TAG(x)              (((x) >> 32) & 0x3ffULL)
 233 #define PPR_PASID1(x)           (((x) >> 16) & 0xffffULL)
 234 #define PPR_PASID2(x)           (((x) >> 42) & 0xfULL)
 235 #define PPR_PASID(x)            ((PPR_PASID2(x) << 16) | PPR_PASID1(x))
 236
 237 #define PPR_REQ_FAULT           0x01
 238
 239 /* Constants for GA Log handling */
 240 #define GA_LOG_ENTRIES          512
 241 #define GA_LOG_SIZE_SHIFT       56
 242 #define GA_LOG_SIZE_512         (0x8ULL << GA_LOG_SIZE_SHIFT)
 243 #define GA_ENTRY_SIZE           8
 244 #define GA_LOG_SIZE             (GA_ENTRY_SIZE * GA_LOG_ENTRIES)
 245
 246 #define GA_TAG(x)               (u32)(x & 0xffffffffULL)
 247 #define GA_DEVID(x)             (u16)(((x) >> 32) & 0xffffULL)
 248 #define GA_REQ_TYPE(x)          (((x) >> 60) & 0xfULL)
 249
 250 #define GA_GUEST_NR             0x1
 251
 252 /* Bit value definition for dte irq remapping fields*/
 253 #define DTE_IRQ_PHYS_ADDR_MASK  (((1ULL << 45)-1) << 6)
 254 #define DTE_IRQ_REMAP_INTCTL_MASK       (0x3ULL << 60)
 255 #define DTE_IRQ_TABLE_LEN_MASK  (0xfULL << 1)
 256 #define DTE_IRQ_REMAP_INTCTL    (2ULL << 60)
 257 #define DTE_IRQ_TABLE_LEN       (8ULL << 1)
 258 #define DTE_IRQ_REMAP_ENABLE    1ULL
 259
 260 #define PAGE_MODE_NONE    0x00
 261 #define PAGE_MODE_1_LEVEL 0x01
 262 #define PAGE_MODE_2_LEVEL 0x02
 263 #define PAGE_MODE_3_LEVEL 0x03
 264 #define PAGE_MODE_4_LEVEL 0x04
 265 #define PAGE_MODE_5_LEVEL 0x05
 266 #define PAGE_MODE_6_LEVEL 0x06
 267 #define PAGE_MODE_7_LEVEL 0x07
 268
 269 #define PM_LEVEL_SHIFT(x)       (12 + ((x) * 9))
 270 #define PM_LEVEL_SIZE(x)        (((x) < 6) ? \
 271                                   ((1ULL << PM_LEVEL_SHIFT((x))) - 1): \
 272                                    (0xffffffffffffffffULL))
 273 #define PM_LEVEL_INDEX(x, a)    (((a) >> PM_LEVEL_SHIFT((x))) & 0x1ffULL)
 274 #define PM_LEVEL_ENC(x)         (((x) << 9) & 0xe00ULL)
 275 #define PM_LEVEL_PDE(x, a)      ((a) | PM_LEVEL_ENC((x)) | \
 276                                  IOMMU_PTE_PR | IOMMU_PTE_IR | IOMMU_PTE_IW)
 277 #define PM_PTE_LEVEL(pte)       (((pte) >> 9) & 0x7ULL)
 278
 279 #define PM_MAP_4k               0
 280 #define PM_ADDR_MASK            0x000ffffffffff000ULL
 281 #define PM_MAP_MASK(lvl)        (PM_ADDR_MASK & \
 282                                 (~((1ULL << (12 + ((lvl) * 9))) - 1)))
 283 #define PM_ALIGNED(lvl, addr)   ((PM_MAP_MASK(lvl) & (addr)) == (addr))
 284
 285 /*
 286  * Returns the page table level to use for a given page size
 287  * Pagesize is expected to be a power-of-two
 288  */
 289 #define PAGE_SIZE_LEVEL(pagesize) \
 290                 ((__ffs(pagesize) - 12) / 9)
 291 /*
 292  * Returns the number of ptes to use for a given page size
 293  * Pagesize is expected to be a power-of-two
 294  */
 295 #define PAGE_SIZE_PTE_COUNT(pagesize) \
 296                 (1ULL << ((__ffs(pagesize) - 12) % 9))
 297
 298 /*
 299  * Aligns a given io-virtual address to a given page size
 300  * Pagesize is expected to be a power-of-two
 301  */
 302 #define PAGE_SIZE_ALIGN(address, pagesize) \
 303                 ((address) & ~((pagesize) - 1))
 304 /*
 305  * Creates an IOMMU PTE for an address and a given pagesize
 306  * The PTE has no permission bits set
 307  * Pagesize is expected to be a power-of-two larger than 4096
 308  */
 309 #define PAGE_SIZE_PTE(address, pagesize)                \
 310                 (((address) | ((pagesize) - 1)) &       \
 311                  (~(pagesize >> 1)) & PM_ADDR_MASK)
 312
 313 /*
 314  * Takes a PTE value with mode=0x07 and returns the page size it maps
 315  */
 316 #define PTE_PAGE_SIZE(pte) \
 317         (1ULL << (1 + ffz(((pte) | 0xfffULL))))
 318
 319 /*
 320  * Takes a page-table level and returns the default page-size for this level
 321  */
 322 #define PTE_LEVEL_PAGE_SIZE(level)                      \
 323         (1ULL << (12 + (9 * (level))))
 324
 325 /*
 326  * Bit value definition for I/O PTE fields
 327  */
 328 #define IOMMU_PTE_PR (1ULL << 0)
 329 #define IOMMU_PTE_U  (1ULL << 59)
 330 #define IOMMU_PTE_FC (1ULL << 60)
 331 #define IOMMU_PTE_IR (1ULL << 61)
 332 #define IOMMU_PTE_IW (1ULL << 62)
 333
 334 /*
 335  * Bit value definition for DTE fields
 336  */
 337 #define DTE_FLAG_V  (1ULL << 0)
 338 #define DTE_FLAG_TV (1ULL << 1)
 339 #define DTE_FLAG_IR (1ULL << 61)
 340 #define DTE_FLAG_IW (1ULL << 62)
 341
 342 #define DTE_FLAG_IOTLB  (1ULL << 32)
 343 #define DTE_FLAG_GV     (1ULL << 55)
 344 #define DTE_FLAG_MASK   (0x3ffULL << 32)
 345 #define DTE_GLX_SHIFT   (56)
 346 #define DTE_GLX_MASK    (3)
 347 #define DEV_DOMID_MASK  0xffffULL
 348
 349 #define DTE_GCR3_VAL_A(x)       (((x) >> 12) & 0x00007ULL)
 350 #define DTE_GCR3_VAL_B(x)       (((x) >> 15) & 0x0ffffULL)
 351 #define DTE_GCR3_VAL_C(x)       (((x) >> 31) & 0x1fffffULL)
 352
 353 #define DTE_GCR3_INDEX_A        0
 354 #define DTE_GCR3_INDEX_B        1
 355 #define DTE_GCR3_INDEX_C        1
 356
 357 #define DTE_GCR3_SHIFT_A        58
 358 #define DTE_GCR3_SHIFT_B        16
 359 #define DTE_GCR3_SHIFT_C        43
 360
 361 #define GCR3_VALID              0x01ULL
 362
 363 #define IOMMU_PAGE_MASK (((1ULL << 52) - 1) & ~0xfffULL)
 364 #define IOMMU_PTE_PRESENT(pte) ((pte) & IOMMU_PTE_PR)
 365 #define IOMMU_PTE_PAGE(pte) (iommu_phys_to_virt((pte) & IOMMU_PAGE_MASK))
 366 #define IOMMU_PTE_MODE(pte) (((pte) >> 9) & 0x07)
 367
 368 #define IOMMU_PROT_MASK 0x03
 369 #define IOMMU_PROT_IR 0x01
 370 #define IOMMU_PROT_IW 0x02
 371
 372 #define IOMMU_UNITY_MAP_FLAG_EXCL_RANGE (1 << 2)
 373
 374 /* IOMMU capabilities */
 375 #define IOMMU_CAP_IOTLB   24
 376 #define IOMMU_CAP_NPCACHE 26
 377 #define IOMMU_CAP_EFR     27
 378
 379 /* IOMMU Feature Reporting Field (for IVHD type 10h */
 380 #define IOMMU_FEAT_GASUP_SHIFT  6
 381
 382 /* IOMMU Extended Feature Register (EFR) */
 383 #define IOMMU_EFR_XTSUP_SHIFT   2
 384 #define IOMMU_EFR_GASUP_SHIFT   7
 385 #define IOMMU_EFR_MSICAPMMIOSUP_SHIFT   46
 386
 387 #define MAX_DOMAIN_ID 65536
 388
 389 /* Protection domain flags */
 390 #define PD_DMA_OPS_MASK         (1UL << 0) /* domain used for dma_ops */
 391 #define PD_DEFAULT_MASK         (1UL << 1) /* domain is a default dma_ops
 392                                               domain for an IOMMU */
 393 #define PD_PASSTHROUGH_MASK     (1UL << 2) /* domain has no page
 394                                               translation */
 395 #define PD_IOMMUV2_MASK         (1UL << 3) /* domain has gcr3 table */
 396
 397 extern bool amd_iommu_dump;
 398 #define DUMP_printk(format, arg...)                                     \
 399         do {                                                            \
 400                 if (amd_iommu_dump)                                             \
 401                         printk(KERN_INFO "AMD-Vi: " format, ## arg);    \
 402         } while(0);
 403
 404 /* global flag if IOMMUs cache non-present entries */
 405 extern bool amd_iommu_np_cache;
 406 /* Only true if all IOMMUs support device IOTLBs */
 407 extern bool amd_iommu_iotlb_sup;
 408
 409 #define MAX_IRQS_PER_TABLE      256
 410 #define IRQ_TABLE_ALIGNMENT     128
 411
 412 struct irq_remap_table {
 413         raw_spinlock_t lock;
 414         unsigned min_index;
 415         u32 *table;
 416 };
 417
 418 extern struct irq_remap_table **irq_lookup_table;
 419
 420 /* Interrupt remapping feature used? */
 421 extern bool amd_iommu_irq_remap;
 422
 423 /* kmem_cache to get tables with 128 byte alignement */
 424 extern struct kmem_cache *amd_iommu_irq_cache;
 425
 426 /*
 427  * Make iterating over all IOMMUs easier
 428  */
 429 #define for_each_iommu(iommu) \
 430         list_for_each_entry((iommu), &amd_iommu_list, list)
 431 #define for_each_iommu_safe(iommu, next) \
 432         list_for_each_entry_safe((iommu), (next), &amd_iommu_list, list)
 433
 434 #define APERTURE_RANGE_SHIFT    27      /* 128 MB */
 435 #define APERTURE_RANGE_SIZE     (1ULL << APERTURE_RANGE_SHIFT)
 436 #define APERTURE_RANGE_PAGES    (APERTURE_RANGE_SIZE >> PAGE_SHIFT)
 437 #define APERTURE_MAX_RANGES     32      /* allows 4GB of DMA address space */
 438 #define APERTURE_RANGE_INDEX(a) ((a) >> APERTURE_RANGE_SHIFT)
 439 #define APERTURE_PAGE_INDEX(a)  (((a) >> 21) & 0x3fULL)
 440
 441 /*
 442  * This struct is used to pass information about
 443  * incoming PPR faults around.
 444  */
 445 struct amd_iommu_fault {
 446         u64 address;    /* IO virtual address of the fault*/
 447         u32 pasid;      /* Address space identifier */
 448         u16 device_id;  /* Originating PCI device id */
 449         u16 tag;        /* PPR tag */
 450         u16 flags;      /* Fault flags */
 451
 452 };
 453
 454
 455 struct iommu_domain;
 456 struct irq_domain;
 457 struct amd_irte_ops;
 458
 459 #define AMD_IOMMU_FLAG_TRANS_PRE_ENABLED      (1 << 0)
 460
 461 /*
 462  * This structure contains generic data for  IOMMU protection domains
 463  * independent of their use.
 464  */
 465 struct protection_domain {
 466         struct list_head dev_list; /* List of all devices in this domain */
 467         struct iommu_domain domain; /* generic domain handle used by
 468                                        iommu core code */
 469         spinlock_t lock;        /* mostly used to lock the page table*/
 470         u16 id;                 /* the domain id written to the device table */
 471         int mode;               /* paging mode (0-6 levels) */
 472         u64 *pt_root;           /* page table root pointer */
 473         int glx;                /* Number of levels for GCR3 table */
 474         u64 *gcr3_tbl;          /* Guest CR3 table */
 475         unsigned long flags;    /* flags to find out type of domain */
 476         unsigned dev_cnt;       /* devices assigned to this domain */
 477         unsigned dev_iommu[MAX_IOMMUS]; /* per-IOMMU reference count */
 478 };
 479
 480 /*
 481  * Structure where we save information about one hardware AMD IOMMU in the
 482  * system.
 483  */
 484 struct amd_iommu {
 485         struct list_head list;
 486
 487         /* Index within the IOMMU array */
 488         int index;
 489
 490         /* locks the accesses to the hardware */
 491         raw_spinlock_t lock;
 492
 493         /* Pointer to PCI device of this IOMMU */
 494         struct pci_dev *dev;
 495
 496         /* Cache pdev to root device for resume quirks */
 497         struct pci_dev *root_pdev;
 498
 499         /* physical address of MMIO space */
 500         u64 mmio_phys;
 501
 502         /* physical end address of MMIO space */
 503         u64 mmio_phys_end;
 504
 505         /* virtual address of MMIO space */
 506         u8 __iomem *mmio_base;
 507
 508         /* capabilities of that IOMMU read from ACPI */
 509         u32 cap;
 510
 511         /* flags read from acpi table */
 512         u8 acpi_flags;
 513
 514         /* Extended features */
 515         u64 features;
 516
 517         /* IOMMUv2 */
 518         bool is_iommu_v2;
 519
 520         /* PCI device id of the IOMMU device */
 521         u16 devid;
 522
 523         /*
 524          * Capability pointer. There could be more than one IOMMU per PCI
 525          * device function if there are more than one AMD IOMMU capability
 526          * pointers.
 527          */
 528         u16 cap_ptr;
 529
 530         /* pci domain of this IOMMU */
 531         u16 pci_seg;
 532
 533         /* start of exclusion range of that IOMMU */
 534         u64 exclusion_start;
 535         /* length of exclusion range of that IOMMU */
 536         u64 exclusion_length;
 537
 538         /* command buffer virtual address */
 539         u8 *cmd_buf;
 540         u32 cmd_buf_head;
 541         u32 cmd_buf_tail;
 542
 543         /* event buffer virtual address */
 544         u8 *evt_buf;
 545
 546         /* Base of the PPR log, if present */
 547         u8 *ppr_log;
 548
 549         /* Base of the GA log, if present */
 550         u8 *ga_log;
 551
 552         /* Tail of the GA log, if present */
 553         u8 *ga_log_tail;
 554
 555         /* true if interrupts for this IOMMU are already enabled */
 556         bool int_enabled;
 557
 558         /* if one, we need to send a completion wait command */
 559         bool need_sync;
 560
 561         /* Handle for IOMMU core code */
 562         struct iommu_device iommu;
 563
 564         /*
 565          * We can't rely on the BIOS to restore all values on reinit, so we
 566          * need to stash them
 567          */
 568
 569         /* The iommu BAR */
 570         u32 stored_addr_lo;
 571         u32 stored_addr_hi;
 572
 573         /*
 574          * Each iommu has 6 l1s, each of which is documented as having 0x12
 575          * registers
 576          */
 577         u32 stored_l1[6][0x12];
 578
 579         /* The l2 indirect registers */
 580         u32 stored_l2[0x83];
 581
 582         /* The maximum PC banks and counters/bank (PCSup=1) */
 583         u8 max_banks;
 584         u8 max_counters;
 585 #ifdef CONFIG_IRQ_REMAP
 586         struct irq_domain *ir_domain;
 587         struct irq_domain *msi_domain;
 588
 589         struct amd_irte_ops *irte_ops;
 590 #endif
 591
 592         u32 flags;
 593         volatile u64 __aligned(8) cmd_sem;
 594
 595 #ifdef CONFIG_AMD_IOMMU_DEBUGFS
 596         /* DebugFS Info */
 597         struct dentry *debugfs;
 598 #endif
 599         /* IRQ notifier for IntCapXT interrupt */
 600         struct irq_affinity_notify intcapxt_notify;
 601 };
 602
 603 static inline struct amd_iommu *dev_to_amd_iommu(struct device *dev)
 604 {
 605         struct iommu_device *iommu = dev_to_iommu_device(dev);
 606
 607         return container_of(iommu, struct amd_iommu, iommu);
 608 }
 609
 610 #define ACPIHID_UID_LEN 256
 611 #define ACPIHID_HID_LEN 9
 612
 613 struct acpihid_map_entry {
 614         struct list_head list;
 615         u8 uid[ACPIHID_UID_LEN];
 616         u8 hid[ACPIHID_HID_LEN];
 617         u16 devid;
 618         u16 root_devid;
 619         bool cmd_line;
 620         struct iommu_group *group;
 621 };
 622
 623 struct devid_map {
 624         struct list_head list;
 625         u8 id;
 626         u16 devid;
 627         bool cmd_line;
 628 };
 629
 630 /*
 631  * This struct contains device specific data for the IOMMU
 632  */
 633 struct iommu_dev_data {
 634         /*Protect against attach/detach races */
 635         spinlock_t lock;
 636
 637         struct list_head list;            /* For domain->dev_list */
 638         struct llist_node dev_data_list;  /* For global dev_data_list */
 639         struct protection_domain *domain; /* Domain the device is bound to */
 640         struct pci_dev *pdev;
 641         u16 devid;                        /* PCI Device ID */
 642         bool iommu_v2;                    /* Device can make use of IOMMUv2 */
 643         bool passthrough;                 /* Device is identity mapped */
 644         struct {
 645                 bool enabled;
 646                 int qdep;
 647         } ats;                            /* ATS state */
 648         bool pri_tlp;                     /* PASID TLB required for
 649                                              PPR completions */
 650         u32 errata;                       /* Bitmap for errata to apply */
 651         bool use_vapic;                   /* Enable device to use vapic mode */
 652         bool defer_attach;
 653
 654         struct ratelimit_state rs;        /* Ratelimit IOPF messages */
 655 };
 656
 657 /* Map HPET and IOAPIC ids to the devid used by the IOMMU */
 658 extern struct list_head ioapic_map;
 659 extern struct list_head hpet_map;
 660 extern struct list_head acpihid_map;
 661
 662 /*
 663  * List with all IOMMUs in the system. This list is not locked because it is
 664  * only written and read at driver initialization or suspend time
 665  */
 666 extern struct list_head amd_iommu_list;
 667
 668 /*
 669  * Array with pointers to each IOMMU struct
 670  * The indices are referenced in the protection domains
 671  */
 672 extern struct amd_iommu *amd_iommus[MAX_IOMMUS];
 673
 674 /*
 675  * Structure defining one entry in the device table
 676  */
 677 struct dev_table_entry {
 678         u64 data[4];
 679 };
 680
 681 /*
 682  * One entry for unity mappings parsed out of the ACPI table.
 683  */
 684 struct unity_map_entry {
 685         struct list_head list;
 686
 687         /* starting device id this entry is used for (including) */
 688         u16 devid_start;
 689         /* end device id this entry is used for (including) */
 690         u16 devid_end;
 691
 692         /* start address to unity map (including) */
 693         u64 address_start;
 694         /* end address to unity map (including) */
 695         u64 address_end;
 696
 697         /* required protection */
 698         int prot;
 699 };
 700
 701 /*
 702  * List of all unity mappings. It is not locked because as runtime it is only
 703  * read. It is created at ACPI table parsing time.
 704  */
 705 extern struct list_head amd_iommu_unity_map;
 706
 707 /*
 708  * Data structures for device handling
 709  */
 710
 711 /*
 712  * Device table used by hardware. Read and write accesses by software are
 713  * locked with the amd_iommu_pd_table lock.
 714  */
 715 extern struct dev_table_entry *amd_iommu_dev_table;
 716
 717 /*
 718  * Alias table to find requestor ids to device ids. Not locked because only
 719  * read on runtime.
 720  */
 721 extern u16 *amd_iommu_alias_table;
 722
 723 /*
 724  * Reverse lookup table to find the IOMMU which translates a specific device.
 725  */
 726 extern struct amd_iommu **amd_iommu_rlookup_table;
 727
 728 /* size of the dma_ops aperture as power of 2 */
 729 extern unsigned amd_iommu_aperture_order;
 730
 731 /* largest PCI device id we expect translation requests for */
 732 extern u16 amd_iommu_last_bdf;
 733
 734 /* allocation bitmap for domain ids */
 735 extern unsigned long *amd_iommu_pd_alloc_bitmap;
 736
 737 /*
 738  * If true, the addresses will be flushed on unmap time, not when
 739  * they are reused
 740  */
 741 extern bool amd_iommu_unmap_flush;
 742
 743 /* Smallest max PASID supported by any IOMMU in the system */
 744 extern u32 amd_iommu_max_pasid;
 745
 746 extern bool amd_iommu_v2_present;
 747
 748 extern bool amd_iommu_force_isolation;
 749
 750 /* Max levels of glxval supported */
 751 extern int amd_iommu_max_glx_val;
 752
 753 /*
 754  * This function flushes all internal caches of
 755  * the IOMMU used by this driver.
 756  */
 757 extern void iommu_flush_all_caches(struct amd_iommu *iommu);
 758
 759 static inline int get_ioapic_devid(int id)
 760 {
 761         struct devid_map *entry;
 762
 763         list_for_each_entry(entry, &ioapic_map, list) {
 764                 if (entry->id == id)
 765                         return entry->devid;
 766         }
 767
 768         return -EINVAL;
 769 }
 770
 771 static inline int get_hpet_devid(int id)
 772 {
 773         struct devid_map *entry;
 774
 775         list_for_each_entry(entry, &hpet_map, list) {
 776                 if (entry->id == id)
 777                         return entry->devid;
 778         }
 779
 780         return -EINVAL;
 781 }
 782
 783 enum amd_iommu_intr_mode_type {
 784         AMD_IOMMU_GUEST_IR_LEGACY,
 785
 786         /* This mode is not visible to users. It is used when
 787          * we cannot fully enable vAPIC and fallback to only support
 788          * legacy interrupt remapping via 128-bit IRTE.
 789          */
 790         AMD_IOMMU_GUEST_IR_LEGACY_GA,
 791         AMD_IOMMU_GUEST_IR_VAPIC,
 792 };
 793
 794 #define AMD_IOMMU_GUEST_IR_GA(x)        (x == AMD_IOMMU_GUEST_IR_VAPIC || \
 795                                          x == AMD_IOMMU_GUEST_IR_LEGACY_GA)
 796
 797 #define AMD_IOMMU_GUEST_IR_VAPIC(x)     (x == AMD_IOMMU_GUEST_IR_VAPIC)
 798
 799 union irte {
 800         u32 val;
 801         struct {
 802                 u32 valid       : 1,
 803                     no_fault    : 1,
 804                     int_type    : 3,
 805                     rq_eoi      : 1,
 806                     dm          : 1,
 807                     rsvd_1      : 1,
 808                     destination : 8,
 809                     vector      : 8,
 810                     rsvd_2      : 8;
 811         } fields;
 812 };
 813
 814 #define APICID_TO_IRTE_DEST_LO(x)    (x & 0xffffff)
 815 #define APICID_TO_IRTE_DEST_HI(x)    ((x >> 24) & 0xff)
 816
 817 union irte_ga_lo {
 818         u64 val;
 819
 820         /* For int remapping */
 821         struct {
 822                 u64 valid       : 1,
 823                     no_fault    : 1,
 824                     /* ------ */
 825                     int_type    : 3,
 826                     rq_eoi      : 1,
 827                     dm          : 1,
 828                     /* ------ */
 829                     guest_mode  : 1,
 830                     destination : 24,
 831                     ga_tag      : 32;
 832         } fields_remap;
 833
 834         /* For guest vAPIC */
 835         struct {
 836                 u64 valid       : 1,
 837                     no_fault    : 1,
 838                     /* ------ */
 839                     ga_log_intr : 1,
 840                     rsvd1       : 3,
 841                     is_run      : 1,
 842                     /* ------ */
 843                     guest_mode  : 1,
 844                     destination : 24,
 845                     ga_tag      : 32;
 846         } fields_vapic;
 847 };
 848
 849 union irte_ga_hi {
 850         u64 val;
 851         struct {
 852                 u64 vector      : 8,
 853                     rsvd_1      : 4,
 854                     ga_root_ptr : 40,
 855                     rsvd_2      : 4,
 856                     destination : 8;
 857         } fields;
 858 };
 859
 860 struct irte_ga {
 861         union irte_ga_lo lo;
 862         union irte_ga_hi hi;
 863 };
 864
 865 struct irq_2_irte {
 866         u16 devid; /* Device ID for IRTE table */
 867         u16 index; /* Index into IRTE table*/
 868 };
 869
 870 struct amd_ir_data {
 871         u32 cached_ga_tag;
 872         struct irq_2_irte irq_2_irte;
 873         struct msi_msg msi_entry;
 874         void *entry;    /* Pointer to union irte or struct irte_ga */
 875         void *ref;      /* Pointer to the actual irte */
 876
 877         /**
 878          * Store information for activate/de-activate
 879          * Guest virtual APIC mode during runtime.
 880          */
 881         struct irq_cfg *cfg;
 882         int ga_vector;
 883         int ga_root_ptr;
 884         int ga_tag;
 885 };
 886
 887 struct amd_irte_ops {
 888         void (*prepare)(void *, u32, u32, u8, u32, int);
 889         void (*activate)(void *, u16, u16);
 890         void (*deactivate)(void *, u16, u16);
 891         void (*set_affinity)(void *, u16, u16, u8, u32);
 892         void *(*get)(struct irq_remap_table *, int);
 893         void (*set_allocated)(struct irq_remap_table *, int);
 894         bool (*is_allocated)(struct irq_remap_table *, int);
 895         void (*clear_allocated)(struct irq_remap_table *, int);
 896 };
 897
 898 #ifdef CONFIG_IRQ_REMAP
 899 extern struct amd_irte_ops irte_32_ops;
 900 extern struct amd_irte_ops irte_128_ops;
 901 #endif
 902
 903 #endif /* _ASM_X86_AMD_IOMMU_TYPES_H */