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1/* SPDX-License-Identifier: GPL-2.0 */2 3#ifndef __NX_H__4#define __NX_H__5 6#include <crypto/ctr.h>7 8#define NX_NAME "nx-crypto"9#define NX_STRING "IBM Power7+ Nest Accelerator Crypto Driver"10#define NX_VERSION "1.0"11 12/* a scatterlist in the format PHYP is expecting */13struct nx_sg {14 u64 addr;15 u32 rsvd;16 u32 len;17} __attribute((packed));18 19#define NX_PAGE_SIZE (4096)20#define NX_MAX_SG_ENTRIES (NX_PAGE_SIZE/(sizeof(struct nx_sg)))21 22enum nx_status {23 NX_DISABLED,24 NX_WAITING,25 NX_OKAY26};27 28/* msc_triplet and max_sync_cop are used only to assist in parsing the29 * openFirmware property */30struct msc_triplet {31 u32 keybitlen;32 u32 databytelen;33 u32 sglen;34} __packed;35 36struct max_sync_cop {37 u32 fc;38 u32 mode;39 u32 triplets;40 struct msc_triplet trip[];41} __packed;42 43struct alg_props {44 u32 databytelen;45 u32 sglen;46};47 48#define NX_OF_FLAG_MAXSGLEN_SET (1)49#define NX_OF_FLAG_STATUS_SET (2)50#define NX_OF_FLAG_MAXSYNCCOP_SET (4)51#define NX_OF_FLAG_MASK_READY (NX_OF_FLAG_MAXSGLEN_SET | \52 NX_OF_FLAG_STATUS_SET | \53 NX_OF_FLAG_MAXSYNCCOP_SET)54struct nx_of {55 u32 flags;56 u32 max_sg_len;57 enum nx_status status;58 struct alg_props ap[NX_MAX_FC][NX_MAX_MODE][3];59};60 61struct nx_stats {62 atomic_t aes_ops;63 atomic64_t aes_bytes;64 atomic_t sha256_ops;65 atomic64_t sha256_bytes;66 atomic_t sha512_ops;67 atomic64_t sha512_bytes;68 69 atomic_t sync_ops;70 71 atomic_t errors;72 atomic_t last_error;73 atomic_t last_error_pid;74};75 76struct nx_crypto_driver {77 struct nx_stats stats;78 struct nx_of of;79 struct vio_dev *viodev;80 struct vio_driver viodriver;81 struct dentry *dfs_root;82};83 84#define NX_GCM4106_NONCE_LEN (4)85#define NX_GCM_CTR_OFFSET (12)86struct nx_gcm_rctx {87 u8 iv[16];88};89 90struct nx_gcm_priv {91 u8 iauth_tag[16];92 u8 nonce[NX_GCM4106_NONCE_LEN];93};94 95#define NX_CCM_AES_KEY_LEN (16)96#define NX_CCM4309_AES_KEY_LEN (19)97#define NX_CCM4309_NONCE_LEN (3)98struct nx_ccm_rctx {99 u8 iv[16];100};101 102struct nx_ccm_priv {103 u8 b0[16];104 u8 iauth_tag[16];105 u8 oauth_tag[16];106 u8 nonce[NX_CCM4309_NONCE_LEN];107};108 109struct nx_xcbc_priv {110 u8 key[16];111};112 113struct nx_ctr_priv {114 u8 nonce[CTR_RFC3686_NONCE_SIZE];115};116 117struct nx_crypto_ctx {118 spinlock_t lock; /* synchronize access to the context */119 void *kmem; /* unaligned, kmalloc'd buffer */120 size_t kmem_len; /* length of kmem */121 struct nx_csbcpb *csbcpb; /* aligned page given to phyp @ hcall time */122 struct vio_pfo_op op; /* operation struct with hcall parameters */123 struct nx_csbcpb *csbcpb_aead; /* secondary csbcpb used by AEAD algs */124 struct vio_pfo_op op_aead;/* operation struct for csbcpb_aead */125 126 struct nx_sg *in_sg; /* aligned pointer into kmem to an sg list */127 struct nx_sg *out_sg; /* aligned pointer into kmem to an sg list */128 129 struct alg_props *ap; /* pointer into props based on our key size */130 struct alg_props props[3];/* openFirmware properties for requests */131 struct nx_stats *stats; /* pointer into an nx_crypto_driver for stats132 reporting */133 134 union {135 struct nx_gcm_priv gcm;136 struct nx_ccm_priv ccm;137 struct nx_xcbc_priv xcbc;138 struct nx_ctr_priv ctr;139 } priv;140};141 142struct crypto_aead;143 144/* prototypes */145int nx_crypto_ctx_aes_ccm_init(struct crypto_aead *tfm);146int nx_crypto_ctx_aes_gcm_init(struct crypto_aead *tfm);147int nx_crypto_ctx_aes_xcbc_init(struct crypto_tfm *tfm);148int nx_crypto_ctx_aes_ctr_init(struct crypto_skcipher *tfm);149int nx_crypto_ctx_aes_cbc_init(struct crypto_skcipher *tfm);150int nx_crypto_ctx_aes_ecb_init(struct crypto_skcipher *tfm);151int nx_crypto_ctx_sha_init(struct crypto_tfm *tfm);152void nx_crypto_ctx_exit(struct crypto_tfm *tfm);153void nx_crypto_ctx_skcipher_exit(struct crypto_skcipher *tfm);154void nx_crypto_ctx_aead_exit(struct crypto_aead *tfm);155void nx_ctx_init(struct nx_crypto_ctx *nx_ctx, unsigned int function);156int nx_hcall_sync(struct nx_crypto_ctx *ctx, struct vio_pfo_op *op,157 u32 may_sleep);158struct nx_sg *nx_build_sg_list(struct nx_sg *, u8 *, unsigned int *, u32);159int nx_build_sg_lists(struct nx_crypto_ctx *nx_ctx, const u8 *iv,160 struct scatterlist *dst, struct scatterlist *src,161 unsigned int *nbytes, unsigned int offset, u8 *oiv);162struct nx_sg *nx_walk_and_build(struct nx_sg *, unsigned int,163 struct scatterlist *, unsigned int,164 unsigned int *);165 166#ifdef CONFIG_DEBUG_FS167#define NX_DEBUGFS_INIT(drv) nx_debugfs_init(drv)168#define NX_DEBUGFS_FINI(drv) nx_debugfs_fini(drv)169 170void nx_debugfs_init(struct nx_crypto_driver *);171void nx_debugfs_fini(struct nx_crypto_driver *);172#else173#define NX_DEBUGFS_INIT(drv) do {} while (0)174#define NX_DEBUGFS_FINI(drv) do {} while (0)175#endif176 177#define NX_PAGE_NUM(x) ((u64)(x) & 0xfffffffffffff000ULL)178 179extern struct skcipher_alg nx_cbc_aes_alg;180extern struct skcipher_alg nx_ecb_aes_alg;181extern struct aead_alg nx_gcm_aes_alg;182extern struct aead_alg nx_gcm4106_aes_alg;183extern struct skcipher_alg nx_ctr3686_aes_alg;184extern struct aead_alg nx_ccm_aes_alg;185extern struct aead_alg nx_ccm4309_aes_alg;186extern struct shash_alg nx_shash_aes_xcbc_alg;187extern struct shash_alg nx_shash_sha512_alg;188extern struct shash_alg nx_shash_sha256_alg;189 190extern struct nx_crypto_driver nx_driver;191 192#define SCATTERWALK_TO_SG 1193#define SCATTERWALK_FROM_SG 0194 195#endif196