473 lines
13 KiB
C
473 lines
13 KiB
C
|
|
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright 2016 Broadcom
|
|
*/
|
|
|
|
#ifndef _CIPHER_H
|
|
#define _CIPHER_H
|
|
|
|
#include <linux/atomic.h>
|
|
#include <linux/mailbox/brcm-message.h>
|
|
#include <linux/mailbox_client.h>
|
|
#include <crypto/aes.h>
|
|
#include <crypto/internal/hash.h>
|
|
#include <crypto/internal/skcipher.h>
|
|
#include <crypto/aead.h>
|
|
#include <crypto/arc4.h>
|
|
#include <crypto/gcm.h>
|
|
#include <crypto/sha.h>
|
|
#include <crypto/sha3.h>
|
|
|
|
#include "spu.h"
|
|
#include "spum.h"
|
|
#include "spu2.h"
|
|
|
|
/* Driver supports up to MAX_SPUS SPU blocks */
|
|
#define MAX_SPUS 16
|
|
|
|
#define ARC4_STATE_SIZE 4
|
|
|
|
#define CCM_AES_IV_SIZE 16
|
|
#define CCM_ESP_IV_SIZE 8
|
|
#define RFC4543_ICV_SIZE 16
|
|
|
|
#define MAX_KEY_SIZE ARC4_MAX_KEY_SIZE
|
|
#define MAX_IV_SIZE AES_BLOCK_SIZE
|
|
#define MAX_DIGEST_SIZE SHA3_512_DIGEST_SIZE
|
|
#define MAX_ASSOC_SIZE 512
|
|
|
|
/* size of salt value for AES-GCM-ESP and AES-CCM-ESP */
|
|
#define GCM_ESP_SALT_SIZE 4
|
|
#define CCM_ESP_SALT_SIZE 3
|
|
#define MAX_SALT_SIZE GCM_ESP_SALT_SIZE
|
|
#define GCM_ESP_SALT_OFFSET 0
|
|
#define CCM_ESP_SALT_OFFSET 1
|
|
|
|
#define GCM_ESP_DIGESTSIZE 16
|
|
|
|
#define MAX_HASH_BLOCK_SIZE SHA512_BLOCK_SIZE
|
|
|
|
/*
|
|
* Maximum number of bytes from a non-final hash request that can be deferred
|
|
* until more data is available. With new crypto API framework, this
|
|
* can be no more than one block of data.
|
|
*/
|
|
#define HASH_CARRY_MAX MAX_HASH_BLOCK_SIZE
|
|
|
|
/* Force at least 4-byte alignment of all SPU message fields */
|
|
#define SPU_MSG_ALIGN 4
|
|
|
|
/* Number of times to resend mailbox message if mb queue is full */
|
|
#define SPU_MB_RETRY_MAX 1000
|
|
|
|
/* op_counts[] indexes */
|
|
enum op_type {
|
|
SPU_OP_CIPHER,
|
|
SPU_OP_HASH,
|
|
SPU_OP_HMAC,
|
|
SPU_OP_AEAD,
|
|
SPU_OP_NUM
|
|
};
|
|
|
|
enum spu_spu_type {
|
|
SPU_TYPE_SPUM,
|
|
SPU_TYPE_SPU2,
|
|
};
|
|
|
|
/*
|
|
* SPUM_NS2 and SPUM_NSP are the SPU-M block on Northstar 2 and Northstar Plus,
|
|
* respectively.
|
|
*/
|
|
enum spu_spu_subtype {
|
|
SPU_SUBTYPE_SPUM_NS2,
|
|
SPU_SUBTYPE_SPUM_NSP,
|
|
SPU_SUBTYPE_SPU2_V1,
|
|
SPU_SUBTYPE_SPU2_V2
|
|
};
|
|
|
|
struct spu_type_subtype {
|
|
enum spu_spu_type type;
|
|
enum spu_spu_subtype subtype;
|
|
};
|
|
|
|
struct cipher_op {
|
|
enum spu_cipher_alg alg;
|
|
enum spu_cipher_mode mode;
|
|
};
|
|
|
|
struct auth_op {
|
|
enum hash_alg alg;
|
|
enum hash_mode mode;
|
|
};
|
|
|
|
struct iproc_alg_s {
|
|
u32 type;
|
|
union {
|
|
struct skcipher_alg skcipher;
|
|
struct ahash_alg hash;
|
|
struct aead_alg aead;
|
|
} alg;
|
|
struct cipher_op cipher_info;
|
|
struct auth_op auth_info;
|
|
bool auth_first;
|
|
bool registered;
|
|
};
|
|
|
|
/*
|
|
* Buffers for a SPU request/reply message pair. All part of one structure to
|
|
* allow a single alloc per request.
|
|
*/
|
|
struct spu_msg_buf {
|
|
/* Request message fragments */
|
|
|
|
/*
|
|
* SPU request message header. For SPU-M, holds MH, EMH, SCTX, BDESC,
|
|
* and BD header. For SPU2, holds FMD, OMD.
|
|
*/
|
|
u8 bcm_spu_req_hdr[ALIGN(SPU2_HEADER_ALLOC_LEN, SPU_MSG_ALIGN)];
|
|
|
|
/* IV or counter. Size to include salt. Also used for XTS tweek. */
|
|
u8 iv_ctr[ALIGN(2 * AES_BLOCK_SIZE, SPU_MSG_ALIGN)];
|
|
|
|
/* Hash digest. request and response. */
|
|
u8 digest[ALIGN(MAX_DIGEST_SIZE, SPU_MSG_ALIGN)];
|
|
|
|
/* SPU request message padding */
|
|
u8 spu_req_pad[ALIGN(SPU_PAD_LEN_MAX, SPU_MSG_ALIGN)];
|
|
|
|
/* SPU-M request message STATUS field */
|
|
u8 tx_stat[ALIGN(SPU_TX_STATUS_LEN, SPU_MSG_ALIGN)];
|
|
|
|
/* Response message fragments */
|
|
|
|
/* SPU response message header */
|
|
u8 spu_resp_hdr[ALIGN(SPU2_HEADER_ALLOC_LEN, SPU_MSG_ALIGN)];
|
|
|
|
/* SPU response message STATUS field padding */
|
|
u8 rx_stat_pad[ALIGN(SPU_STAT_PAD_MAX, SPU_MSG_ALIGN)];
|
|
|
|
/* SPU response message STATUS field */
|
|
u8 rx_stat[ALIGN(SPU_RX_STATUS_LEN, SPU_MSG_ALIGN)];
|
|
|
|
union {
|
|
/* Buffers only used for skcipher */
|
|
struct {
|
|
/*
|
|
* Field used for either SUPDT when RC4 is used
|
|
* -OR- tweak value when XTS/AES is used
|
|
*/
|
|
u8 supdt_tweak[ALIGN(SPU_SUPDT_LEN, SPU_MSG_ALIGN)];
|
|
} c;
|
|
|
|
/* Buffers only used for aead */
|
|
struct {
|
|
/* SPU response pad for GCM data */
|
|
u8 gcmpad[ALIGN(AES_BLOCK_SIZE, SPU_MSG_ALIGN)];
|
|
|
|
/* SPU request msg padding for GCM AAD */
|
|
u8 req_aad_pad[ALIGN(SPU_PAD_LEN_MAX, SPU_MSG_ALIGN)];
|
|
|
|
/* SPU response data to be discarded */
|
|
u8 resp_aad[ALIGN(MAX_ASSOC_SIZE + MAX_IV_SIZE,
|
|
SPU_MSG_ALIGN)];
|
|
} a;
|
|
};
|
|
};
|
|
|
|
struct iproc_ctx_s {
|
|
u8 enckey[MAX_KEY_SIZE + ARC4_STATE_SIZE];
|
|
unsigned int enckeylen;
|
|
|
|
u8 authkey[MAX_KEY_SIZE + ARC4_STATE_SIZE];
|
|
unsigned int authkeylen;
|
|
|
|
u8 salt[MAX_SALT_SIZE];
|
|
unsigned int salt_len;
|
|
unsigned int salt_offset;
|
|
u8 iv[MAX_IV_SIZE];
|
|
|
|
unsigned int digestsize;
|
|
|
|
struct iproc_alg_s *alg;
|
|
bool is_esp;
|
|
|
|
struct cipher_op cipher;
|
|
enum spu_cipher_type cipher_type;
|
|
|
|
struct auth_op auth;
|
|
bool auth_first;
|
|
|
|
/*
|
|
* The maximum length in bytes of the payload in a SPU message for this
|
|
* context. For SPU-M, the payload is the combination of AAD and data.
|
|
* For SPU2, the payload is just data. A value of SPU_MAX_PAYLOAD_INF
|
|
* indicates that there is no limit to the length of the SPU message
|
|
* payload.
|
|
*/
|
|
unsigned int max_payload;
|
|
|
|
struct crypto_aead *fallback_cipher;
|
|
|
|
/* auth_type is determined during processing of request */
|
|
|
|
u8 ipad[MAX_HASH_BLOCK_SIZE];
|
|
u8 opad[MAX_HASH_BLOCK_SIZE];
|
|
|
|
/*
|
|
* Buffer to hold SPU message header template. Template is created at
|
|
* setkey time for skcipher requests, since most of the fields in the
|
|
* header are known at that time. At request time, just fill in a few
|
|
* missing pieces related to length of data in the request and IVs, etc.
|
|
*/
|
|
u8 bcm_spu_req_hdr[ALIGN(SPU2_HEADER_ALLOC_LEN, SPU_MSG_ALIGN)];
|
|
|
|
/* Length of SPU request header */
|
|
u16 spu_req_hdr_len;
|
|
|
|
/* Expected length of SPU response header */
|
|
u16 spu_resp_hdr_len;
|
|
|
|
/*
|
|
* shash descriptor - needed to perform incremental hashing in
|
|
* in software, when hw doesn't support it.
|
|
*/
|
|
struct shash_desc *shash;
|
|
|
|
bool is_rfc4543; /* RFC 4543 style of GMAC */
|
|
};
|
|
|
|
/* state from iproc_reqctx_s necessary for hash state export/import */
|
|
struct spu_hash_export_s {
|
|
unsigned int total_todo;
|
|
unsigned int total_sent;
|
|
u8 hash_carry[HASH_CARRY_MAX];
|
|
unsigned int hash_carry_len;
|
|
u8 incr_hash[MAX_DIGEST_SIZE];
|
|
bool is_sw_hmac;
|
|
};
|
|
|
|
struct iproc_reqctx_s {
|
|
/* general context */
|
|
struct crypto_async_request *parent;
|
|
|
|
/* only valid after enqueue() */
|
|
struct iproc_ctx_s *ctx;
|
|
|
|
u8 chan_idx; /* Mailbox channel to be used to submit this request */
|
|
|
|
/* total todo, rx'd, and sent for this request */
|
|
unsigned int total_todo;
|
|
unsigned int total_received; /* only valid for skcipher */
|
|
unsigned int total_sent;
|
|
|
|
/*
|
|
* num bytes sent to hw from the src sg in this request. This can differ
|
|
* from total_sent for incremental hashing. total_sent includes previous
|
|
* init() and update() data. src_sent does not.
|
|
*/
|
|
unsigned int src_sent;
|
|
|
|
/*
|
|
* For AEAD requests, start of associated data. This will typically
|
|
* point to the beginning of the src scatterlist from the request,
|
|
* since assoc data is at the beginning of the src scatterlist rather
|
|
* than in its own sg.
|
|
*/
|
|
struct scatterlist *assoc;
|
|
|
|
/*
|
|
* scatterlist entry and offset to start of data for next chunk. Crypto
|
|
* API src scatterlist for AEAD starts with AAD, if present. For first
|
|
* chunk, src_sg is sg entry at beginning of input data (after AAD).
|
|
* src_skip begins at the offset in that sg entry where data begins.
|
|
*/
|
|
struct scatterlist *src_sg;
|
|
int src_nents; /* Number of src entries with data */
|
|
u32 src_skip; /* bytes of current sg entry already used */
|
|
|
|
/*
|
|
* Same for destination. For AEAD, if there is AAD, output data must
|
|
* be written at offset following AAD.
|
|
*/
|
|
struct scatterlist *dst_sg;
|
|
int dst_nents; /* Number of dst entries with data */
|
|
u32 dst_skip; /* bytes of current sg entry already written */
|
|
|
|
/* Mailbox message used to send this request to PDC driver */
|
|
struct brcm_message mb_mssg;
|
|
|
|
bool bd_suppress; /* suppress BD field in SPU response? */
|
|
|
|
/* cipher context */
|
|
bool is_encrypt;
|
|
|
|
/*
|
|
* CBC mode: IV. CTR mode: counter. Else empty. Used as a DMA
|
|
* buffer for AEAD requests. So allocate as DMAable memory. If IV
|
|
* concatenated with salt, includes the salt.
|
|
*/
|
|
u8 *iv_ctr;
|
|
/* Length of IV or counter, in bytes */
|
|
unsigned int iv_ctr_len;
|
|
|
|
/*
|
|
* Hash requests can be of any size, whether initial, update, or final.
|
|
* A non-final request must be submitted to the SPU as an integral
|
|
* number of blocks. This may leave data at the end of the request
|
|
* that is not a full block. Since the request is non-final, it cannot
|
|
* be padded. So, we write the remainder to this hash_carry buffer and
|
|
* hold it until the next request arrives. The carry data is then
|
|
* submitted at the beginning of the data in the next SPU msg.
|
|
* hash_carry_len is the number of bytes currently in hash_carry. These
|
|
* fields are only used for ahash requests.
|
|
*/
|
|
u8 hash_carry[HASH_CARRY_MAX];
|
|
unsigned int hash_carry_len;
|
|
unsigned int is_final; /* is this the final for the hash op? */
|
|
|
|
/*
|
|
* Digest from incremental hash is saved here to include in next hash
|
|
* operation. Cannot be stored in req->result for truncated hashes,
|
|
* since result may be sized for final digest. Cannot be saved in
|
|
* msg_buf because that gets deleted between incremental hash ops
|
|
* and is not saved as part of export().
|
|
*/
|
|
u8 incr_hash[MAX_DIGEST_SIZE];
|
|
|
|
/* hmac context */
|
|
bool is_sw_hmac;
|
|
|
|
/* aead context */
|
|
struct crypto_tfm *old_tfm;
|
|
crypto_completion_t old_complete;
|
|
void *old_data;
|
|
|
|
gfp_t gfp;
|
|
|
|
/* Buffers used to build SPU request and response messages */
|
|
struct spu_msg_buf msg_buf;
|
|
};
|
|
|
|
/*
|
|
* Structure encapsulates a set of function pointers specific to the type of
|
|
* SPU hardware running. These functions handling creation and parsing of
|
|
* SPU request messages and SPU response messages. Includes hardware-specific
|
|
* values read from device tree.
|
|
*/
|
|
struct spu_hw {
|
|
void (*spu_dump_msg_hdr)(u8 *buf, unsigned int buf_len);
|
|
u32 (*spu_ctx_max_payload)(enum spu_cipher_alg cipher_alg,
|
|
enum spu_cipher_mode cipher_mode,
|
|
unsigned int blocksize);
|
|
u32 (*spu_payload_length)(u8 *spu_hdr);
|
|
u16 (*spu_response_hdr_len)(u16 auth_key_len, u16 enc_key_len,
|
|
bool is_hash);
|
|
u16 (*spu_hash_pad_len)(enum hash_alg hash_alg,
|
|
enum hash_mode hash_mode, u32 chunksize,
|
|
u16 hash_block_size);
|
|
u32 (*spu_gcm_ccm_pad_len)(enum spu_cipher_mode cipher_mode,
|
|
unsigned int data_size);
|
|
u32 (*spu_assoc_resp_len)(enum spu_cipher_mode cipher_mode,
|
|
unsigned int assoc_len,
|
|
unsigned int iv_len, bool is_encrypt);
|
|
u8 (*spu_aead_ivlen)(enum spu_cipher_mode cipher_mode,
|
|
u16 iv_len);
|
|
enum hash_type (*spu_hash_type)(u32 src_sent);
|
|
u32 (*spu_digest_size)(u32 digest_size, enum hash_alg alg,
|
|
enum hash_type);
|
|
u32 (*spu_create_request)(u8 *spu_hdr,
|
|
struct spu_request_opts *req_opts,
|
|
struct spu_cipher_parms *cipher_parms,
|
|
struct spu_hash_parms *hash_parms,
|
|
struct spu_aead_parms *aead_parms,
|
|
unsigned int data_size);
|
|
u16 (*spu_cipher_req_init)(u8 *spu_hdr,
|
|
struct spu_cipher_parms *cipher_parms);
|
|
void (*spu_cipher_req_finish)(u8 *spu_hdr,
|
|
u16 spu_req_hdr_len,
|
|
unsigned int is_inbound,
|
|
struct spu_cipher_parms *cipher_parms,
|
|
bool update_key,
|
|
unsigned int data_size);
|
|
void (*spu_request_pad)(u8 *pad_start, u32 gcm_padding,
|
|
u32 hash_pad_len, enum hash_alg auth_alg,
|
|
enum hash_mode auth_mode,
|
|
unsigned int total_sent, u32 status_padding);
|
|
u8 (*spu_xts_tweak_in_payload)(void);
|
|
u8 (*spu_tx_status_len)(void);
|
|
u8 (*spu_rx_status_len)(void);
|
|
int (*spu_status_process)(u8 *statp);
|
|
void (*spu_ccm_update_iv)(unsigned int digestsize,
|
|
struct spu_cipher_parms *cipher_parms,
|
|
unsigned int assoclen, unsigned int chunksize,
|
|
bool is_encrypt, bool is_esp);
|
|
u32 (*spu_wordalign_padlen)(u32 data_size);
|
|
|
|
/* The base virtual address of the SPU hw registers */
|
|
void __iomem *reg_vbase[MAX_SPUS];
|
|
|
|
/* Version of the SPU hardware */
|
|
enum spu_spu_type spu_type;
|
|
|
|
/* Sub-version of the SPU hardware */
|
|
enum spu_spu_subtype spu_subtype;
|
|
|
|
/* The number of SPUs on this platform */
|
|
u32 num_spu;
|
|
|
|
/* The number of SPU channels on this platform */
|
|
u32 num_chan;
|
|
};
|
|
|
|
struct device_private {
|
|
struct platform_device *pdev;
|
|
|
|
struct spu_hw spu;
|
|
|
|
atomic_t session_count; /* number of streams active */
|
|
atomic_t stream_count; /* monotonic counter for streamID's */
|
|
|
|
/* Length of BCM header. Set to 0 when hw does not expect BCM HEADER. */
|
|
u8 bcm_hdr_len;
|
|
|
|
/* The index of the channel to use for the next crypto request */
|
|
atomic_t next_chan;
|
|
|
|
struct dentry *debugfs_dir;
|
|
struct dentry *debugfs_stats;
|
|
|
|
/* Number of request bytes processed and result bytes returned */
|
|
atomic64_t bytes_in;
|
|
atomic64_t bytes_out;
|
|
|
|
/* Number of operations of each type */
|
|
atomic_t op_counts[SPU_OP_NUM];
|
|
|
|
atomic_t cipher_cnt[CIPHER_ALG_LAST][CIPHER_MODE_LAST];
|
|
atomic_t hash_cnt[HASH_ALG_LAST];
|
|
atomic_t hmac_cnt[HASH_ALG_LAST];
|
|
atomic_t aead_cnt[AEAD_TYPE_LAST];
|
|
|
|
/* Number of calls to setkey() for each operation type */
|
|
atomic_t setkey_cnt[SPU_OP_NUM];
|
|
|
|
/* Number of times request was resubmitted because mb was full */
|
|
atomic_t mb_no_spc;
|
|
|
|
/* Number of mailbox send failures */
|
|
atomic_t mb_send_fail;
|
|
|
|
/* Number of ICV check failures for AEAD messages */
|
|
atomic_t bad_icv;
|
|
|
|
struct mbox_client mcl;
|
|
|
|
/* Array of mailbox channel pointers, one for each channel */
|
|
struct mbox_chan **mbox;
|
|
};
|
|
|
|
extern struct device_private iproc_priv;
|
|
|
|
#endif
|