drivers/crypto/ccp/ccp-dev.h

   1 /*
   2  * AMD Cryptographic Coprocessor (CCP) driver
   3  *
   4  * Copyright (C) 2013,2016 Advanced Micro Devices, Inc.
   5  *
   6  * Author: Tom Lendacky <thomas.lendacky@amd.com>
   7  * Author: Gary R Hook <gary.hook@amd.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #ifndef __CCP_DEV_H__
  15 #define __CCP_DEV_H__
  16
  17 #include <linux/device.h>
  18 #include <linux/pci.h>
  19 #include <linux/spinlock.h>
  20 #include <linux/mutex.h>
  21 #include <linux/list.h>
  22 #include <linux/wait.h>
  23 #include <linux/dmapool.h>
  24 #include <linux/hw_random.h>
  25 #include <linux/bitops.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/irqreturn.h>
  28 #include <linux/dmaengine.h>
  29
  30 #define MAX_CCP_NAME_LEN                16
  31 #define MAX_DMAPOOL_NAME_LEN            32
  32
  33 #define MAX_HW_QUEUES                   5
  34 #define MAX_CMD_QLEN                    100
  35
  36 #define TRNG_RETRIES                    10
  37
  38 #define CACHE_NONE                      0x00
  39 #define CACHE_WB_NO_ALLOC               0xb7
  40
  41 /****** Register Mappings ******/
  42 #define Q_MASK_REG                      0x000
  43 #define TRNG_OUT_REG                    0x00c
  44 #define IRQ_MASK_REG                    0x040
  45 #define IRQ_STATUS_REG                  0x200
  46
  47 #define DEL_CMD_Q_JOB                   0x124
  48 #define DEL_Q_ACTIVE                    0x00000200
  49 #define DEL_Q_ID_SHIFT                  6
  50
  51 #define CMD_REQ0                        0x180
  52 #define CMD_REQ_INCR                    0x04
  53
  54 #define CMD_Q_STATUS_BASE               0x210
  55 #define CMD_Q_INT_STATUS_BASE           0x214
  56 #define CMD_Q_STATUS_INCR               0x20
  57
  58 #define CMD_Q_CACHE_BASE                0x228
  59 #define CMD_Q_CACHE_INC                 0x20
  60
  61 #define CMD_Q_ERROR(__qs)               ((__qs) & 0x0000003f)
  62 #define CMD_Q_DEPTH(__qs)               (((__qs) >> 12) & 0x0000000f)
  63
  64 /* ------------------------ CCP Version 5 Specifics ------------------------ */
  65 #define CMD5_QUEUE_MASK_OFFSET          0x00
  66 #define CMD5_QUEUE_PRIO_OFFSET          0x04
  67 #define CMD5_REQID_CONFIG_OFFSET        0x08
  68 #define CMD5_CMD_TIMEOUT_OFFSET         0x10
  69 #define LSB_PUBLIC_MASK_LO_OFFSET       0x18
  70 #define LSB_PUBLIC_MASK_HI_OFFSET       0x1C
  71 #define LSB_PRIVATE_MASK_LO_OFFSET      0x20
  72 #define LSB_PRIVATE_MASK_HI_OFFSET      0x24
  73 #define CMD5_PSP_CCP_VERSION            0x100
  74
  75 #define CMD5_Q_CONTROL_BASE             0x0000
  76 #define CMD5_Q_TAIL_LO_BASE             0x0004
  77 #define CMD5_Q_HEAD_LO_BASE             0x0008
  78 #define CMD5_Q_INT_ENABLE_BASE          0x000C
  79 #define CMD5_Q_INTERRUPT_STATUS_BASE    0x0010
  80
  81 #define CMD5_Q_STATUS_BASE              0x0100
  82 #define CMD5_Q_INT_STATUS_BASE          0x0104
  83 #define CMD5_Q_DMA_STATUS_BASE          0x0108
  84 #define CMD5_Q_DMA_READ_STATUS_BASE     0x010C
  85 #define CMD5_Q_DMA_WRITE_STATUS_BASE    0x0110
  86 #define CMD5_Q_ABORT_BASE               0x0114
  87 #define CMD5_Q_AX_CACHE_BASE            0x0118
  88
  89 #define CMD5_CONFIG_0_OFFSET            0x6000
  90 #define CMD5_TRNG_CTL_OFFSET            0x6008
  91 #define CMD5_AES_MASK_OFFSET            0x6010
  92 #define CMD5_CLK_GATE_CTL_OFFSET        0x603C
  93
  94 /* Address offset between two virtual queue registers */
  95 #define CMD5_Q_STATUS_INCR              0x1000
  96
  97 /* Bit masks */
  98 #define CMD5_Q_RUN                      0x1
  99 #define CMD5_Q_HALT                     0x2
 100 #define CMD5_Q_MEM_LOCATION             0x4
 101 #define CMD5_Q_SIZE                     0x1F
 102 #define CMD5_Q_SHIFT                    3
 103 #define COMMANDS_PER_QUEUE              16
 104 #define QUEUE_SIZE_VAL                  ((ffs(COMMANDS_PER_QUEUE) - 2) & \
 105                                           CMD5_Q_SIZE)
 106 #define Q_PTR_MASK                      (2 << (QUEUE_SIZE_VAL + 5) - 1)
 107 #define Q_DESC_SIZE                     sizeof(struct ccp5_desc)
 108 #define Q_SIZE(n)                       (COMMANDS_PER_QUEUE*(n))
 109
 110 #define INT_COMPLETION                  0x1
 111 #define INT_ERROR                       0x2
 112 #define INT_QUEUE_STOPPED               0x4
 113 #define INT_EMPTY_QUEUE                 0x8
 114 #define SUPPORTED_INTERRUPTS            (INT_COMPLETION | INT_ERROR)
 115
 116 #define LSB_REGION_WIDTH                5
 117 #define MAX_LSB_CNT                     8
 118
 119 #define LSB_SIZE                        16
 120 #define LSB_ITEM_SIZE                   32
 121 #define PLSB_MAP_SIZE                   (LSB_SIZE)
 122 #define SLSB_MAP_SIZE                   (MAX_LSB_CNT * LSB_SIZE)
 123
 124 #define LSB_ENTRY_NUMBER(LSB_ADDR)      (LSB_ADDR / LSB_ITEM_SIZE)
 125
 126 /* ------------------------ CCP Version 3 Specifics ------------------------ */
 127 #define REQ0_WAIT_FOR_WRITE             0x00000004
 128 #define REQ0_INT_ON_COMPLETE            0x00000002
 129 #define REQ0_STOP_ON_COMPLETE           0x00000001
 130
 131 #define REQ0_CMD_Q_SHIFT                9
 132 #define REQ0_JOBID_SHIFT                3
 133
 134 /****** REQ1 Related Values ******/
 135 #define REQ1_PROTECT_SHIFT              27
 136 #define REQ1_ENGINE_SHIFT               23
 137 #define REQ1_KEY_KSB_SHIFT              2
 138
 139 #define REQ1_EOM                        0x00000002
 140 #define REQ1_INIT                       0x00000001
 141
 142 /* AES Related Values */
 143 #define REQ1_AES_TYPE_SHIFT             21
 144 #define REQ1_AES_MODE_SHIFT             18
 145 #define REQ1_AES_ACTION_SHIFT           17
 146 #define REQ1_AES_CFB_SIZE_SHIFT         10
 147
 148 /* XTS-AES Related Values */
 149 #define REQ1_XTS_AES_SIZE_SHIFT         10
 150
 151 /* SHA Related Values */
 152 #define REQ1_SHA_TYPE_SHIFT             21
 153
 154 /* RSA Related Values */
 155 #define REQ1_RSA_MOD_SIZE_SHIFT         10
 156
 157 /* Pass-Through Related Values */
 158 #define REQ1_PT_BW_SHIFT                12
 159 #define REQ1_PT_BS_SHIFT                10
 160
 161 /* ECC Related Values */
 162 #define REQ1_ECC_AFFINE_CONVERT         0x00200000
 163 #define REQ1_ECC_FUNCTION_SHIFT         18
 164
 165 /****** REQ4 Related Values ******/
 166 #define REQ4_KSB_SHIFT                  18
 167 #define REQ4_MEMTYPE_SHIFT              16
 168
 169 /****** REQ6 Related Values ******/
 170 #define REQ6_MEMTYPE_SHIFT              16
 171
 172 /****** Key Storage Block ******/
 173 #define KSB_START                       77
 174 #define KSB_END                         127
 175 #define KSB_COUNT                       (KSB_END - KSB_START + 1)
 176 #define CCP_SB_BITS                     256
 177
 178 #define CCP_JOBID_MASK                  0x0000003f
 179
 180 /* ------------------------ General CCP Defines ------------------------ */
 181
 182 #define CCP_DMA_DFLT                    0x0
 183 #define CCP_DMA_PRIV                    0x1
 184 #define CCP_DMA_PUB                     0x2
 185
 186 #define CCP_DMAPOOL_MAX_SIZE            64
 187 #define CCP_DMAPOOL_ALIGN               BIT(5)
 188
 189 #define CCP_REVERSE_BUF_SIZE            64
 190
 191 #define CCP_AES_KEY_SB_COUNT            1
 192 #define CCP_AES_CTX_SB_COUNT            1
 193
 194 #define CCP_XTS_AES_KEY_SB_COUNT        1
 195 #define CCP5_XTS_AES_KEY_SB_COUNT       2
 196 #define CCP_XTS_AES_CTX_SB_COUNT        1
 197
 198 #define CCP_DES3_KEY_SB_COUNT           1
 199 #define CCP_DES3_CTX_SB_COUNT           1
 200
 201 #define CCP_SHA_SB_COUNT                1
 202
 203 #define CCP_RSA_MAX_WIDTH               4096
 204
 205 #define CCP_PASSTHRU_BLOCKSIZE          256
 206 #define CCP_PASSTHRU_MASKSIZE           32
 207 #define CCP_PASSTHRU_SB_COUNT           1
 208
 209 #define CCP_ECC_MODULUS_BYTES           48      /* 384-bits */
 210 #define CCP_ECC_MAX_OPERANDS            6
 211 #define CCP_ECC_MAX_OUTPUTS             3
 212 #define CCP_ECC_SRC_BUF_SIZE            448
 213 #define CCP_ECC_DST_BUF_SIZE            192
 214 #define CCP_ECC_OPERAND_SIZE            64
 215 #define CCP_ECC_OUTPUT_SIZE             64
 216 #define CCP_ECC_RESULT_OFFSET           60
 217 #define CCP_ECC_RESULT_SUCCESS          0x0001
 218
 219 #define CCP_SB_BYTES                    32
 220
 221 struct ccp_op;
 222 struct ccp_device;
 223 struct ccp_cmd;
 224 struct ccp_fns;
 225
 226 struct ccp_dma_cmd {
 227         struct list_head entry;
 228
 229         struct ccp_cmd ccp_cmd;
 230 };
 231
 232 struct ccp_dma_desc {
 233         struct list_head entry;
 234
 235         struct ccp_device *ccp;
 236
 237         struct list_head pending;
 238         struct list_head active;
 239
 240         enum dma_status status;
 241         struct dma_async_tx_descriptor tx_desc;
 242         size_t len;
 243 };
 244
 245 struct ccp_dma_chan {
 246         struct ccp_device *ccp;
 247
 248         spinlock_t lock;
 249         struct list_head created;
 250         struct list_head pending;
 251         struct list_head active;
 252         struct list_head complete;
 253
 254         struct tasklet_struct cleanup_tasklet;
 255
 256         enum dma_status status;
 257         struct dma_chan dma_chan;
 258 };
 259
 260 struct ccp_cmd_queue {
 261         struct ccp_device *ccp;
 262
 263         /* Queue identifier */
 264         u32 id;
 265
 266         /* Queue dma pool */
 267         struct dma_pool *dma_pool;
 268
 269         /* Queue base address (not neccessarily aligned)*/
 270         struct ccp5_desc *qbase;
 271
 272         /* Aligned queue start address (per requirement) */
 273         struct mutex q_mutex ____cacheline_aligned;
 274         unsigned int qidx;
 275
 276         /* Version 5 has different requirements for queue memory */
 277         unsigned int qsize;
 278         dma_addr_t qbase_dma;
 279         dma_addr_t qdma_tail;
 280
 281         /* Per-queue reserved storage block(s) */
 282         u32 sb_key;
 283         u32 sb_ctx;
 284
 285         /* Bitmap of LSBs that can be accessed by this queue */
 286         DECLARE_BITMAP(lsbmask, MAX_LSB_CNT);
 287         /* Private LSB that is assigned to this queue, or -1 if none.
 288          * Bitmap for my private LSB, unused otherwise
 289          */
 290         int lsb;
 291         DECLARE_BITMAP(lsbmap, PLSB_MAP_SIZE);
 292
 293         /* Queue processing thread */
 294         struct task_struct *kthread;
 295         unsigned int active;
 296         unsigned int suspended;
 297
 298         /* Number of free command slots available */
 299         unsigned int free_slots;
 300
 301         /* Interrupt masks */
 302         u32 int_ok;
 303         u32 int_err;
 304
 305         /* Register addresses for queue */
 306         void __iomem *reg_control;
 307         void __iomem *reg_tail_lo;
 308         void __iomem *reg_head_lo;
 309         void __iomem *reg_int_enable;
 310         void __iomem *reg_interrupt_status;
 311         void __iomem *reg_status;
 312         void __iomem *reg_int_status;
 313         void __iomem *reg_dma_status;
 314         void __iomem *reg_dma_read_status;
 315         void __iomem *reg_dma_write_status;
 316         u32 qcontrol; /* Cached control register */
 317
 318         /* Status values from job */
 319         u32 int_status;
 320         u32 q_status;
 321         u32 q_int_status;
 322         u32 cmd_error;
 323
 324         /* Interrupt wait queue */
 325         wait_queue_head_t int_queue;
 326         unsigned int int_rcvd;
 327
 328         /* Per-queue Statistics */
 329         unsigned long total_ops;
 330         unsigned long total_aes_ops;
 331         unsigned long total_xts_aes_ops;
 332         unsigned long total_3des_ops;
 333         unsigned long total_sha_ops;
 334         unsigned long total_rsa_ops;
 335         unsigned long total_pt_ops;
 336         unsigned long total_ecc_ops;
 337 } ____cacheline_aligned;
 338
 339 struct ccp_device {
 340         struct list_head entry;
 341
 342         struct ccp_vdata *vdata;
 343         unsigned int ord;
 344         char name[MAX_CCP_NAME_LEN];
 345         char rngname[MAX_CCP_NAME_LEN];
 346
 347         struct device *dev;
 348
 349         /* Bus specific device information
 350          */
 351         void *dev_specific;
 352         int (*get_irq)(struct ccp_device *ccp);
 353         void (*free_irq)(struct ccp_device *ccp);
 354         unsigned int qim;
 355         unsigned int irq;
 356         bool use_tasklet;
 357         struct tasklet_struct irq_tasklet;
 358
 359         /* I/O area used for device communication. The register mapping
 360          * starts at an offset into the mapped bar.
 361          *   The CMD_REQx registers and the Delete_Cmd_Queue_Job register
 362          *   need to be protected while a command queue thread is accessing
 363          *   them.
 364          */
 365         struct mutex req_mutex ____cacheline_aligned;
 366         void __iomem *io_map;
 367         void __iomem *io_regs;
 368
 369         /* Master lists that all cmds are queued on. Because there can be
 370          * more than one CCP command queue that can process a cmd a separate
 371          * backlog list is neeeded so that the backlog completion call
 372          * completes before the cmd is available for execution.
 373          */
 374         spinlock_t cmd_lock ____cacheline_aligned;
 375         unsigned int cmd_count;
 376         struct list_head cmd;
 377         struct list_head backlog;
 378
 379         /* The command queues. These represent the queues available on the
 380          * CCP that are available for processing cmds
 381          */
 382         struct ccp_cmd_queue cmd_q[MAX_HW_QUEUES];
 383         unsigned int cmd_q_count;
 384
 385         /* Support for the CCP True RNG
 386          */
 387         struct hwrng hwrng;
 388         unsigned int hwrng_retries;
 389
 390         /* Support for the CCP DMA capabilities
 391          */
 392         struct dma_device dma_dev;
 393         struct ccp_dma_chan *ccp_dma_chan;
 394         struct kmem_cache *dma_cmd_cache;
 395         struct kmem_cache *dma_desc_cache;
 396
 397         /* A counter used to generate job-ids for cmds submitted to the CCP
 398          */
 399         atomic_t current_id ____cacheline_aligned;
 400
 401         /* The v3 CCP uses key storage blocks (SB) to maintain context for
 402          * certain operations. To prevent multiple cmds from using the same
 403          * SB range a command queue reserves an SB range for the duration of
 404          * the cmd. Each queue, will however, reserve 2 SB blocks for
 405          * operations that only require single SB entries (eg. AES context/iv
 406          * and key) in order to avoid allocation contention.  This will reserve
 407          * at most 10 SB entries, leaving 40 SB entries available for dynamic
 408          * allocation.
 409          *
 410          * The v5 CCP Local Storage Block (LSB) is broken up into 8
 411          * memrory ranges, each of which can be enabled for access by one
 412          * or more queues. Device initialization takes this into account,
 413          * and attempts to assign one region for exclusive use by each
 414          * available queue; the rest are then aggregated as "public" use.
 415          * If there are fewer regions than queues, all regions are shared
 416          * amongst all queues.
 417          */
 418         struct mutex sb_mutex ____cacheline_aligned;
 419         DECLARE_BITMAP(sb, KSB_COUNT);
 420         wait_queue_head_t sb_queue;
 421         unsigned int sb_avail;
 422         unsigned int sb_count;
 423         u32 sb_start;
 424
 425         /* Bitmap of shared LSBs, if any */
 426         DECLARE_BITMAP(lsbmap, SLSB_MAP_SIZE);
 427
 428         /* Suspend support */
 429         unsigned int suspending;
 430         wait_queue_head_t suspend_queue;
 431
 432         /* DMA caching attribute support */
 433         unsigned int axcache;
 434
 435         /* Device Statistics */
 436         unsigned long total_interrupts;
 437
 438         /* DebugFS info */
 439         struct dentry *debugfs_instance;
 440 };
 441
 442 enum ccp_memtype {
 443         CCP_MEMTYPE_SYSTEM = 0,
 444         CCP_MEMTYPE_SB,
 445         CCP_MEMTYPE_LOCAL,
 446         CCP_MEMTYPE__LAST,
 447 };
 448 #define CCP_MEMTYPE_LSB CCP_MEMTYPE_KSB
 449
 450
 451 struct ccp_dma_info {
 452         dma_addr_t address;
 453         unsigned int offset;
 454         unsigned int length;
 455         enum dma_data_direction dir;
 456 } __packed __aligned(4);
 457
 458 struct ccp_dm_workarea {
 459         struct device *dev;
 460         struct dma_pool *dma_pool;
 461
 462         u8 *address;
 463         struct ccp_dma_info dma;
 464         unsigned int length;
 465 };
 466
 467 struct ccp_sg_workarea {
 468         struct scatterlist *sg;
 469         int nents;
 470         unsigned int sg_used;
 471
 472         struct scatterlist *dma_sg;
 473         struct device *dma_dev;
 474         unsigned int dma_count;
 475         enum dma_data_direction dma_dir;
 476
 477         u64 bytes_left;
 478 };
 479
 480 struct ccp_data {
 481         struct ccp_sg_workarea sg_wa;
 482         struct ccp_dm_workarea dm_wa;
 483 };
 484
 485 struct ccp_mem {
 486         enum ccp_memtype type;
 487         union {
 488                 struct ccp_dma_info dma;
 489                 u32 sb;
 490         } u;
 491 };
 492
 493 struct ccp_aes_op {
 494         enum ccp_aes_type type;
 495         enum ccp_aes_mode mode;
 496         enum ccp_aes_action action;
 497         unsigned int size;
 498 };
 499
 500 struct ccp_xts_aes_op {
 501         enum ccp_aes_type type;
 502         enum ccp_aes_action action;
 503         enum ccp_xts_aes_unit_size unit_size;
 504 };
 505
 506 struct ccp_des3_op {
 507         enum ccp_des3_type type;
 508         enum ccp_des3_mode mode;
 509         enum ccp_des3_action action;
 510 };
 511
 512 struct ccp_sha_op {
 513         enum ccp_sha_type type;
 514         u64 msg_bits;
 515 };
 516
 517 struct ccp_rsa_op {
 518         u32 mod_size;
 519         u32 input_len;
 520 };
 521
 522 struct ccp_passthru_op {
 523         enum ccp_passthru_bitwise bit_mod;
 524         enum ccp_passthru_byteswap byte_swap;
 525 };
 526
 527 struct ccp_ecc_op {
 528         enum ccp_ecc_function function;
 529 };
 530
 531 struct ccp_op {
 532         struct ccp_cmd_queue *cmd_q;
 533
 534         u32 jobid;
 535         u32 ioc;
 536         u32 soc;
 537         u32 sb_key;
 538         u32 sb_ctx;
 539         u32 init;
 540         u32 eom;
 541
 542         struct ccp_mem src;
 543         struct ccp_mem dst;
 544         struct ccp_mem exp;
 545
 546         union {
 547                 struct ccp_aes_op aes;
 548                 struct ccp_xts_aes_op xts;
 549                 struct ccp_des3_op des3;
 550                 struct ccp_sha_op sha;
 551                 struct ccp_rsa_op rsa;
 552                 struct ccp_passthru_op passthru;
 553                 struct ccp_ecc_op ecc;
 554         } u;
 555 };
 556
 557 static inline u32 ccp_addr_lo(struct ccp_dma_info *info)
 558 {
 559         return lower_32_bits(info->address + info->offset);
 560 }
 561
 562 static inline u32 ccp_addr_hi(struct ccp_dma_info *info)
 563 {
 564         return upper_32_bits(info->address + info->offset) & 0x0000ffff;
 565 }
 566
 567 /**
 568  * descriptor for version 5 CPP commands
 569  * 8 32-bit words:
 570  * word 0: function; engine; control bits
 571  * word 1: length of source data
 572  * word 2: low 32 bits of source pointer
 573  * word 3: upper 16 bits of source pointer; source memory type
 574  * word 4: low 32 bits of destination pointer
 575  * word 5: upper 16 bits of destination pointer; destination memory type
 576  * word 6: low 32 bits of key pointer
 577  * word 7: upper 16 bits of key pointer; key memory type
 578  */
 579 struct dword0 {
 580         unsigned int soc:1;
 581         unsigned int ioc:1;
 582         unsigned int rsvd1:1;
 583         unsigned int init:1;
 584         unsigned int eom:1;             /* AES/SHA only */
 585         unsigned int function:15;
 586         unsigned int engine:4;
 587         unsigned int prot:1;
 588         unsigned int rsvd2:7;
 589 };
 590
 591 struct dword3 {
 592         unsigned int  src_hi:16;
 593         unsigned int  src_mem:2;
 594         unsigned int  lsb_cxt_id:8;
 595         unsigned int  rsvd1:5;
 596         unsigned int  fixed:1;
 597 };
 598
 599 union dword4 {
 600         __le32 dst_lo;          /* NON-SHA      */
 601         __le32 sha_len_lo;      /* SHA          */
 602 };
 603
 604 union dword5 {
 605         struct {
 606                 unsigned int  dst_hi:16;
 607                 unsigned int  dst_mem:2;
 608                 unsigned int  rsvd1:13;
 609                 unsigned int  fixed:1;
 610         } fields;
 611         __le32 sha_len_hi;
 612 };
 613
 614 struct dword7 {
 615         unsigned int  key_hi:16;
 616         unsigned int  key_mem:2;
 617         unsigned int  rsvd1:14;
 618 };
 619
 620 struct ccp5_desc {
 621         struct dword0 dw0;
 622         __le32 length;
 623         __le32 src_lo;
 624         struct dword3 dw3;
 625         union dword4 dw4;
 626         union dword5 dw5;
 627         __le32 key_lo;
 628         struct dword7 dw7;
 629 };
 630
 631 int ccp_pci_init(void);
 632 void ccp_pci_exit(void);
 633
 634 int ccp_platform_init(void);
 635 void ccp_platform_exit(void);
 636
 637 void ccp_add_device(struct ccp_device *ccp);
 638 void ccp_del_device(struct ccp_device *ccp);
 639
 640 extern void ccp_log_error(struct ccp_device *, int);
 641
 642 struct ccp_device *ccp_alloc_struct(struct device *dev);
 643 bool ccp_queues_suspended(struct ccp_device *ccp);
 644 int ccp_cmd_queue_thread(void *data);
 645 int ccp_trng_read(struct hwrng *rng, void *data, size_t max, bool wait);
 646
 647 int ccp_run_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd);
 648
 649 int ccp_register_rng(struct ccp_device *ccp);
 650 void ccp_unregister_rng(struct ccp_device *ccp);
 651 int ccp_dmaengine_register(struct ccp_device *ccp);
 652 void ccp_dmaengine_unregister(struct ccp_device *ccp);
 653
 654 void ccp5_debugfs_setup(struct ccp_device *ccp);
 655 void ccp5_debugfs_destroy(void);
 656
 657 /* Structure for computation functions that are device-specific */
 658 struct ccp_actions {
 659         int (*aes)(struct ccp_op *);
 660         int (*xts_aes)(struct ccp_op *);
 661         int (*des3)(struct ccp_op *);
 662         int (*sha)(struct ccp_op *);
 663         int (*rsa)(struct ccp_op *);
 664         int (*passthru)(struct ccp_op *);
 665         int (*ecc)(struct ccp_op *);
 666         u32 (*sballoc)(struct ccp_cmd_queue *, unsigned int);
 667         void (*sbfree)(struct ccp_cmd_queue *, unsigned int, unsigned int);
 668         unsigned int (*get_free_slots)(struct ccp_cmd_queue *);
 669         int (*init)(struct ccp_device *);
 670         void (*destroy)(struct ccp_device *);
 671         irqreturn_t (*irqhandler)(int, void *);
 672 };
 673
 674 /* Structure to hold CCP version-specific values */
 675 struct ccp_vdata {
 676         const unsigned int version;
 677         const unsigned int dma_chan_attr;
 678         void (*setup)(struct ccp_device *);
 679         const struct ccp_actions *perform;
 680         const unsigned int bar;
 681         const unsigned int offset;
 682 };
 683
 684 extern const struct ccp_vdata ccpv3;
 685 extern const struct ccp_vdata ccpv5a;
 686 extern const struct ccp_vdata ccpv5b;
 687
 688 #endif