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linux/drivers/crypto/marvell/cesa.h
Romain Perier 85030c5168 crypto: marvell - Add support for chaining crypto requests in TDMA mode 
The Cryptographic Engines and Security Accelerators (CESA) supports the
Multi-Packet Chain Mode. With this mode enabled, multiple tdma requests
can be chained and processed by the hardware without software
intervention. This mode was already activated, however the crypto
requests were not chained together. By doing so, we reduce significantly
the number of IRQs. Instead of being interrupted at the end of each
crypto request, we are interrupted at the end of the last cryptographic
request processed by the engine.

This commits re-factorizes the code, changes the code architecture and
adds the required data structures to chain cryptographic requests
together before sending them to an engine (stopped or possibly already
running).

Signed-off-by: Romain Perier <romain.perier@free-electrons.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2016-06-23 18:29:51 +08:00

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#ifndef __MARVELL_CESA_H__
#define __MARVELL_CESA_H__
#include <crypto/algapi.h>
#include <crypto/hash.h>
#include <crypto/internal/hash.h>
#include <linux/crypto.h>
#include <linux/dmapool.h>
#define CESA_ENGINE_OFF(i) (((i) * 0x2000))
#define CESA_TDMA_BYTE_CNT 0x800
#define CESA_TDMA_SRC_ADDR 0x810
#define CESA_TDMA_DST_ADDR 0x820
#define CESA_TDMA_NEXT_ADDR 0x830
#define CESA_TDMA_CONTROL 0x840
#define CESA_TDMA_DST_BURST GENMASK(2, 0)
#define CESA_TDMA_DST_BURST_32B 3
#define CESA_TDMA_DST_BURST_128B 4
#define CESA_TDMA_OUT_RD_EN BIT(4)
#define CESA_TDMA_SRC_BURST GENMASK(8, 6)
#define CESA_TDMA_SRC_BURST_32B (3 << 6)
#define CESA_TDMA_SRC_BURST_128B (4 << 6)
#define CESA_TDMA_CHAIN BIT(9)
#define CESA_TDMA_BYTE_SWAP BIT(11)
#define CESA_TDMA_NO_BYTE_SWAP BIT(11)
#define CESA_TDMA_EN BIT(12)
#define CESA_TDMA_FETCH_ND BIT(13)
#define CESA_TDMA_ACT BIT(14)
#define CESA_TDMA_CUR 0x870
#define CESA_TDMA_ERROR_CAUSE 0x8c8
#define CESA_TDMA_ERROR_MSK 0x8cc
#define CESA_TDMA_WINDOW_BASE(x) (((x) * 0x8) + 0xa00)
#define CESA_TDMA_WINDOW_CTRL(x) (((x) * 0x8) + 0xa04)
#define CESA_IVDIG(x) (0xdd00 + ((x) * 4) + \
(((x) < 5) ? 0 : 0x14))
#define CESA_SA_CMD 0xde00
#define CESA_SA_CMD_EN_CESA_SA_ACCL0 BIT(0)
#define CESA_SA_CMD_EN_CESA_SA_ACCL1 BIT(1)
#define CESA_SA_CMD_DISABLE_SEC BIT(2)
#define CESA_SA_DESC_P0 0xde04
#define CESA_SA_DESC_P1 0xde14
#define CESA_SA_CFG 0xde08
#define CESA_SA_CFG_STOP_DIG_ERR GENMASK(1, 0)
#define CESA_SA_CFG_DIG_ERR_CONT 0
#define CESA_SA_CFG_DIG_ERR_SKIP 1
#define CESA_SA_CFG_DIG_ERR_STOP 3
#define CESA_SA_CFG_CH0_W_IDMA BIT(7)
#define CESA_SA_CFG_CH1_W_IDMA BIT(8)
#define CESA_SA_CFG_ACT_CH0_IDMA BIT(9)
#define CESA_SA_CFG_ACT_CH1_IDMA BIT(10)
#define CESA_SA_CFG_MULTI_PKT BIT(11)
#define CESA_SA_CFG_PARA_DIS BIT(13)
#define CESA_SA_ACCEL_STATUS 0xde0c
#define CESA_SA_ST_ACT_0 BIT(0)
#define CESA_SA_ST_ACT_1 BIT(1)
/*
* CESA_SA_FPGA_INT_STATUS looks like a FPGA leftover and is documented only
* in Errata 4.12. It looks like that it was part of an IRQ-controller in FPGA
* and someone forgot to remove it while switching to the core and moving to
* CESA_SA_INT_STATUS.
*/
#define CESA_SA_FPGA_INT_STATUS 0xdd68
#define CESA_SA_INT_STATUS 0xde20
#define CESA_SA_INT_AUTH_DONE BIT(0)
#define CESA_SA_INT_DES_E_DONE BIT(1)
#define CESA_SA_INT_AES_E_DONE BIT(2)
#define CESA_SA_INT_AES_D_DONE BIT(3)
#define CESA_SA_INT_ENC_DONE BIT(4)
#define CESA_SA_INT_ACCEL0_DONE BIT(5)
#define CESA_SA_INT_ACCEL1_DONE BIT(6)
#define CESA_SA_INT_ACC0_IDMA_DONE BIT(7)
#define CESA_SA_INT_ACC1_IDMA_DONE BIT(8)
#define CESA_SA_INT_IDMA_DONE BIT(9)
#define CESA_SA_INT_IDMA_OWN_ERR BIT(10)
#define CESA_SA_INT_MSK 0xde24
#define CESA_SA_DESC_CFG_OP_MAC_ONLY 0
#define CESA_SA_DESC_CFG_OP_CRYPT_ONLY 1
#define CESA_SA_DESC_CFG_OP_MAC_CRYPT 2
#define CESA_SA_DESC_CFG_OP_CRYPT_MAC 3
#define CESA_SA_DESC_CFG_OP_MSK GENMASK(1, 0)
#define CESA_SA_DESC_CFG_MACM_SHA256 (1 << 4)
#define CESA_SA_DESC_CFG_MACM_HMAC_SHA256 (3 << 4)
#define CESA_SA_DESC_CFG_MACM_MD5 (4 << 4)
#define CESA_SA_DESC_CFG_MACM_SHA1 (5 << 4)
#define CESA_SA_DESC_CFG_MACM_HMAC_MD5 (6 << 4)
#define CESA_SA_DESC_CFG_MACM_HMAC_SHA1 (7 << 4)
#define CESA_SA_DESC_CFG_MACM_MSK GENMASK(6, 4)
#define CESA_SA_DESC_CFG_CRYPTM_DES (1 << 8)
#define CESA_SA_DESC_CFG_CRYPTM_3DES (2 << 8)
#define CESA_SA_DESC_CFG_CRYPTM_AES (3 << 8)
#define CESA_SA_DESC_CFG_CRYPTM_MSK GENMASK(9, 8)
#define CESA_SA_DESC_CFG_DIR_ENC (0 << 12)
#define CESA_SA_DESC_CFG_DIR_DEC (1 << 12)
#define CESA_SA_DESC_CFG_CRYPTCM_ECB (0 << 16)
#define CESA_SA_DESC_CFG_CRYPTCM_CBC (1 << 16)
#define CESA_SA_DESC_CFG_CRYPTCM_MSK BIT(16)
#define CESA_SA_DESC_CFG_3DES_EEE (0 << 20)
#define CESA_SA_DESC_CFG_3DES_EDE (1 << 20)
#define CESA_SA_DESC_CFG_AES_LEN_128 (0 << 24)
#define CESA_SA_DESC_CFG_AES_LEN_192 (1 << 24)
#define CESA_SA_DESC_CFG_AES_LEN_256 (2 << 24)
#define CESA_SA_DESC_CFG_AES_LEN_MSK GENMASK(25, 24)
#define CESA_SA_DESC_CFG_NOT_FRAG (0 << 30)
#define CESA_SA_DESC_CFG_FIRST_FRAG (1 << 30)
#define CESA_SA_DESC_CFG_LAST_FRAG (2 << 30)
#define CESA_SA_DESC_CFG_MID_FRAG (3 << 30)
#define CESA_SA_DESC_CFG_FRAG_MSK GENMASK(31, 30)
/*
* /-----------\ 0
* | ACCEL CFG | 4 * 8
* |-----------| 0x20
* | CRYPT KEY | 8 * 4
* |-----------| 0x40
* | IV IN | 4 * 4
* |-----------| 0x40 (inplace)
* | IV BUF | 4 * 4
* |-----------| 0x80
* | DATA IN | 16 * x (max ->max_req_size)
* |-----------| 0x80 (inplace operation)
* | DATA OUT | 16 * x (max ->max_req_size)
* \-----------/ SRAM size
*/
/*
* Hashing memory map:
* /-----------\ 0
* | ACCEL CFG | 4 * 8
* |-----------| 0x20
* | Inner IV | 8 * 4
* |-----------| 0x40
* | Outer IV | 8 * 4
* |-----------| 0x60
* | Output BUF| 8 * 4
* |-----------| 0x80
* | DATA IN | 64 * x (max ->max_req_size)
* \-----------/ SRAM size
*/
#define CESA_SA_CFG_SRAM_OFFSET 0x00
#define CESA_SA_DATA_SRAM_OFFSET 0x80
#define CESA_SA_CRYPT_KEY_SRAM_OFFSET 0x20
#define CESA_SA_CRYPT_IV_SRAM_OFFSET 0x40
#define CESA_SA_MAC_IIV_SRAM_OFFSET 0x20
#define CESA_SA_MAC_OIV_SRAM_OFFSET 0x40
#define CESA_SA_MAC_DIG_SRAM_OFFSET 0x60
#define CESA_SA_DESC_CRYPT_DATA(offset) \
cpu_to_le32((CESA_SA_DATA_SRAM_OFFSET + (offset)) | \
((CESA_SA_DATA_SRAM_OFFSET + (offset)) << 16))
#define CESA_SA_DESC_CRYPT_IV(offset) \
cpu_to_le32((CESA_SA_CRYPT_IV_SRAM_OFFSET + (offset)) | \
((CESA_SA_CRYPT_IV_SRAM_OFFSET + (offset)) << 16))
#define CESA_SA_DESC_CRYPT_KEY(offset) \
cpu_to_le32(CESA_SA_CRYPT_KEY_SRAM_OFFSET + (offset))
#define CESA_SA_DESC_MAC_DATA(offset) \
cpu_to_le32(CESA_SA_DATA_SRAM_OFFSET + (offset))
#define CESA_SA_DESC_MAC_DATA_MSK cpu_to_le32(GENMASK(15, 0))
#define CESA_SA_DESC_MAC_TOTAL_LEN(total_len) cpu_to_le32((total_len) << 16)
#define CESA_SA_DESC_MAC_TOTAL_LEN_MSK cpu_to_le32(GENMASK(31, 16))
#define CESA_SA_DESC_MAC_SRC_TOTAL_LEN_MAX 0xffff
#define CESA_SA_DESC_MAC_DIGEST(offset) \
cpu_to_le32(CESA_SA_MAC_DIG_SRAM_OFFSET + (offset))
#define CESA_SA_DESC_MAC_DIGEST_MSK cpu_to_le32(GENMASK(15, 0))
#define CESA_SA_DESC_MAC_FRAG_LEN(frag_len) cpu_to_le32((frag_len) << 16)
#define CESA_SA_DESC_MAC_FRAG_LEN_MSK cpu_to_le32(GENMASK(31, 16))
#define CESA_SA_DESC_MAC_IV(offset) \
cpu_to_le32((CESA_SA_MAC_IIV_SRAM_OFFSET + (offset)) | \
((CESA_SA_MAC_OIV_SRAM_OFFSET + (offset)) << 16))
#define CESA_SA_SRAM_SIZE 2048
#define CESA_SA_SRAM_PAYLOAD_SIZE (cesa_dev->sram_size - \
CESA_SA_DATA_SRAM_OFFSET)
#define CESA_SA_DEFAULT_SRAM_SIZE 2048
#define CESA_SA_MIN_SRAM_SIZE 1024
#define CESA_SA_SRAM_MSK (2048 - 1)
#define CESA_MAX_HASH_BLOCK_SIZE 64
#define CESA_HASH_BLOCK_SIZE_MSK (CESA_MAX_HASH_BLOCK_SIZE - 1)
/**
* struct mv_cesa_sec_accel_desc - security accelerator descriptor
* @config: engine config
* @enc_p: input and output data pointers for a cipher operation
* @enc_len: cipher operation length
* @enc_key_p: cipher key pointer
* @enc_iv: cipher IV pointers
* @mac_src_p: input pointer and total hash length
* @mac_digest: digest pointer and hash operation length
* @mac_iv: hmac IV pointers
*
* Structure passed to the CESA engine to describe the crypto operation
* to be executed.
*/
struct mv_cesa_sec_accel_desc {
__le32 config;
__le32 enc_p;
__le32 enc_len;
__le32 enc_key_p;
__le32 enc_iv;
__le32 mac_src_p;
__le32 mac_digest;
__le32 mac_iv;
};
/**
* struct mv_cesa_blkcipher_op_ctx - cipher operation context
* @key: cipher key
* @iv: cipher IV
*
* Context associated to a cipher operation.
*/
struct mv_cesa_blkcipher_op_ctx {
u32 key[8];
u32 iv[4];
};
/**
* struct mv_cesa_hash_op_ctx - hash or hmac operation context
* @key: cipher key
* @iv: cipher IV
*
* Context associated to an hash or hmac operation.
*/
struct mv_cesa_hash_op_ctx {
u32 iv[16];
u32 hash[8];
};
/**
* struct mv_cesa_op_ctx - crypto operation context
* @desc: CESA descriptor
* @ctx: context associated to the crypto operation
*
* Context associated to a crypto operation.
*/
struct mv_cesa_op_ctx {
struct mv_cesa_sec_accel_desc desc;
union {
struct mv_cesa_blkcipher_op_ctx blkcipher;
struct mv_cesa_hash_op_ctx hash;
} ctx;
};
/* TDMA descriptor flags */
#define CESA_TDMA_DST_IN_SRAM BIT(31)
#define CESA_TDMA_SRC_IN_SRAM BIT(30)
#define CESA_TDMA_END_OF_REQ BIT(29)
#define CESA_TDMA_BREAK_CHAIN BIT(28)
#define CESA_TDMA_TYPE_MSK GENMASK(27, 0)
#define CESA_TDMA_DUMMY 0
#define CESA_TDMA_DATA 1
#define CESA_TDMA_OP 2
#define CESA_TDMA_IV 3
/**
* struct mv_cesa_tdma_desc - TDMA descriptor
* @byte_cnt: number of bytes to transfer
* @src: DMA address of the source
* @dst: DMA address of the destination
* @next_dma: DMA address of the next TDMA descriptor
* @cur_dma: DMA address of this TDMA descriptor
* @next: pointer to the next TDMA descriptor
* @op: CESA operation attached to this TDMA descriptor
* @data: raw data attached to this TDMA descriptor
* @flags: flags describing the TDMA transfer. See the
* "TDMA descriptor flags" section above
*
* TDMA descriptor used to create a transfer chain describing a crypto
* operation.
*/
struct mv_cesa_tdma_desc {
__le32 byte_cnt;
__le32 src;
__le32 dst;
__le32 next_dma;
/* Software state */
dma_addr_t cur_dma;
struct mv_cesa_tdma_desc *next;
union {
struct mv_cesa_op_ctx *op;
void *data;
};
u32 flags;
};
/**
* struct mv_cesa_sg_dma_iter - scatter-gather iterator
* @dir: transfer direction
* @sg: scatter list
* @offset: current position in the scatter list
* @op_offset: current position in the crypto operation
*
* Iterator used to iterate over a scatterlist while creating a TDMA chain for
* a crypto operation.
*/
struct mv_cesa_sg_dma_iter {
enum dma_data_direction dir;
struct scatterlist *sg;
unsigned int offset;
unsigned int op_offset;
};
/**
* struct mv_cesa_dma_iter - crypto operation iterator
* @len: the crypto operation length
* @offset: current position in the crypto operation
* @op_len: sub-operation length (the crypto engine can only act on 2kb
* chunks)
*
* Iterator used to create a TDMA chain for a given crypto operation.
*/
struct mv_cesa_dma_iter {
unsigned int len;
unsigned int offset;
unsigned int op_len;
};
/**
* struct mv_cesa_tdma_chain - TDMA chain
* @first: first entry in the TDMA chain
* @last: last entry in the TDMA chain
*
* Stores a TDMA chain for a specific crypto operation.
*/
struct mv_cesa_tdma_chain {
struct mv_cesa_tdma_desc *first;
struct mv_cesa_tdma_desc *last;
};
struct mv_cesa_engine;
/**
* struct mv_cesa_caps - CESA device capabilities
* @engines: number of engines
* @has_tdma: whether this device has a TDMA block
* @cipher_algs: supported cipher algorithms
* @ncipher_algs: number of supported cipher algorithms
* @ahash_algs: supported hash algorithms
* @nahash_algs: number of supported hash algorithms
*
* Structure used to describe CESA device capabilities.
*/
struct mv_cesa_caps {
int nengines;
bool has_tdma;
struct crypto_alg **cipher_algs;
int ncipher_algs;
struct ahash_alg **ahash_algs;
int nahash_algs;
};
/**
* struct mv_cesa_dev_dma - DMA pools
* @tdma_desc_pool: TDMA desc pool
* @op_pool: crypto operation pool
* @cache_pool: data cache pool (used by hash implementation when the
* hash request is smaller than the hash block size)
* @padding_pool: padding pool (used by hash implementation when hardware
* padding cannot be used)
*
* Structure containing the different DMA pools used by this driver.
*/
struct mv_cesa_dev_dma {
struct dma_pool *tdma_desc_pool;
struct dma_pool *op_pool;
struct dma_pool *cache_pool;
struct dma_pool *padding_pool;
struct dma_pool *iv_pool;
};
/**
* struct mv_cesa_dev - CESA device
* @caps: device capabilities
* @regs: device registers
* @sram_size: usable SRAM size
* @lock: device lock
* @engines: array of engines
* @dma: dma pools
*
* Structure storing CESA device information.
*/
struct mv_cesa_dev {
const struct mv_cesa_caps *caps;
void __iomem *regs;
struct device *dev;
unsigned int sram_size;
spinlock_t lock;
struct mv_cesa_engine *engines;
struct mv_cesa_dev_dma *dma;
};
/**
* struct mv_cesa_engine - CESA engine
* @id: engine id
* @regs: engine registers
* @sram: SRAM memory region
* @sram_dma: DMA address of the SRAM memory region
* @lock: engine lock
* @req: current crypto request
* @clk: engine clk
* @zclk: engine zclk
* @max_req_len: maximum chunk length (useful to create the TDMA chain)
* @int_mask: interrupt mask cache
* @pool: memory pool pointing to the memory region reserved in
* SRAM
* @queue: fifo of the pending crypto requests
* @load: engine load counter, useful for load balancing
* @chain: list of the current tdma descriptors being processed
* by this engine.
* @complete_queue: fifo of the processed requests by the engine
*
* Structure storing CESA engine information.
*/
struct mv_cesa_engine {
int id;
void __iomem *regs;
void __iomem *sram;
dma_addr_t sram_dma;
spinlock_t lock;
struct crypto_async_request *req;
struct clk *clk;
struct clk *zclk;
size_t max_req_len;
u32 int_mask;
struct gen_pool *pool;
struct crypto_queue queue;
atomic_t load;
struct mv_cesa_tdma_chain chain;
struct list_head complete_queue;
};
/**
* struct mv_cesa_req_ops - CESA request operations
* @process: process a request chunk result (should return 0 if the
* operation, -EINPROGRESS if it needs more steps or an error
* code)
* @step: launch the crypto operation on the next chunk
* @cleanup: cleanup the crypto request (release associated data)
* @complete: complete the request, i.e copy result or context from sram when
* needed.
*/
struct mv_cesa_req_ops {
int (*process)(struct crypto_async_request *req, u32 status);
void (*step)(struct crypto_async_request *req);
void (*cleanup)(struct crypto_async_request *req);
void (*complete)(struct crypto_async_request *req);
};
/**
* struct mv_cesa_ctx - CESA operation context
* @ops: crypto operations
*
* Base context structure inherited by operation specific ones.
*/
struct mv_cesa_ctx {
const struct mv_cesa_req_ops *ops;
};
/**
* struct mv_cesa_hash_ctx - CESA hash operation context
* @base: base context structure
*
* Hash context structure.
*/
struct mv_cesa_hash_ctx {
struct mv_cesa_ctx base;
};
/**
* struct mv_cesa_hash_ctx - CESA hmac operation context
* @base: base context structure
* @iv: initialization vectors
*
* HMAC context structure.
*/
struct mv_cesa_hmac_ctx {
struct mv_cesa_ctx base;
u32 iv[16];
};
/**
* enum mv_cesa_req_type - request type definitions
* @CESA_STD_REQ: standard request
* @CESA_DMA_REQ: DMA request
*/
enum mv_cesa_req_type {
CESA_STD_REQ,
CESA_DMA_REQ,
};
/**
* struct mv_cesa_req - CESA request
* @engine: engine associated with this request
* @chain: list of tdma descriptors associated with this request
*/
struct mv_cesa_req {
struct mv_cesa_engine *engine;
struct mv_cesa_tdma_chain chain;
};
/**
* struct mv_cesa_sg_std_iter - CESA scatter-gather iterator for standard
* requests
* @iter: sg mapping iterator
* @offset: current offset in the SG entry mapped in memory
*/
struct mv_cesa_sg_std_iter {
struct sg_mapping_iter iter;
unsigned int offset;
};
/**
* struct mv_cesa_ablkcipher_std_req - cipher standard request
* @op: operation context
* @offset: current operation offset
* @size: size of the crypto operation
*/
struct mv_cesa_ablkcipher_std_req {
struct mv_cesa_op_ctx op;
unsigned int offset;
unsigned int size;
bool skip_ctx;
};
/**
* struct mv_cesa_ablkcipher_req - cipher request
* @req: type specific request information
* @src_nents: number of entries in the src sg list
* @dst_nents: number of entries in the dest sg list
*/
struct mv_cesa_ablkcipher_req {
struct mv_cesa_req base;
struct mv_cesa_ablkcipher_std_req std;
int src_nents;
int dst_nents;
};
/**
* struct mv_cesa_ahash_std_req - standard hash request
* @offset: current operation offset
*/
struct mv_cesa_ahash_std_req {
unsigned int offset;
};
/**
* struct mv_cesa_ahash_dma_req - DMA hash request
* @padding: padding buffer
* @padding_dma: DMA address of the padding buffer
* @cache_dma: DMA address of the cache buffer
*/
struct mv_cesa_ahash_dma_req {
u8 *padding;
dma_addr_t padding_dma;
u8 *cache;
dma_addr_t cache_dma;
};
/**
* struct mv_cesa_ahash_req - hash request
* @req: type specific request information
* @cache: cache buffer
* @cache_ptr: write pointer in the cache buffer
* @len: hash total length
* @src_nents: number of entries in the scatterlist
* @last_req: define whether the current operation is the last one
* or not
* @state: hash state
*/
struct mv_cesa_ahash_req {
struct mv_cesa_req base;
union {
struct mv_cesa_ahash_dma_req dma;
struct mv_cesa_ahash_std_req std;
} req;
struct mv_cesa_op_ctx op_tmpl;
u8 cache[CESA_MAX_HASH_BLOCK_SIZE];
unsigned int cache_ptr;
u64 len;
int src_nents;
bool last_req;
bool algo_le;
u32 state[8];
};
/* CESA functions */
extern struct mv_cesa_dev *cesa_dev;
static inline void
mv_cesa_engine_enqueue_complete_request(struct mv_cesa_engine *engine,
struct crypto_async_request *req)
{
list_add_tail(&req->list, &engine->complete_queue);
}
static inline struct crypto_async_request *
mv_cesa_engine_dequeue_complete_request(struct mv_cesa_engine *engine)
{
struct crypto_async_request *req;
req = list_first_entry_or_null(&engine->complete_queue,
struct crypto_async_request,
list);
if (req)
list_del(&req->list);
return req;
}
static inline enum mv_cesa_req_type
mv_cesa_req_get_type(struct mv_cesa_req *req)
{
return req->chain.first ? CESA_DMA_REQ : CESA_STD_REQ;
}
static inline void mv_cesa_update_op_cfg(struct mv_cesa_op_ctx *op,
u32 cfg, u32 mask)
{
op->desc.config &= cpu_to_le32(~mask);
op->desc.config |= cpu_to_le32(cfg);
}
static inline u32 mv_cesa_get_op_cfg(const struct mv_cesa_op_ctx *op)
{
return le32_to_cpu(op->desc.config);
}
static inline void mv_cesa_set_op_cfg(struct mv_cesa_op_ctx *op, u32 cfg)
{
op->desc.config = cpu_to_le32(cfg);
}
static inline void mv_cesa_adjust_op(struct mv_cesa_engine *engine,
struct mv_cesa_op_ctx *op)
{
u32 offset = engine->sram_dma & CESA_SA_SRAM_MSK;
op->desc.enc_p = CESA_SA_DESC_CRYPT_DATA(offset);
op->desc.enc_key_p = CESA_SA_DESC_CRYPT_KEY(offset);
op->desc.enc_iv = CESA_SA_DESC_CRYPT_IV(offset);
op->desc.mac_src_p &= ~CESA_SA_DESC_MAC_DATA_MSK;
op->desc.mac_src_p |= CESA_SA_DESC_MAC_DATA(offset);
op->desc.mac_digest &= ~CESA_SA_DESC_MAC_DIGEST_MSK;
op->desc.mac_digest |= CESA_SA_DESC_MAC_DIGEST(offset);
op->desc.mac_iv = CESA_SA_DESC_MAC_IV(offset);
}
static inline void mv_cesa_set_crypt_op_len(struct mv_cesa_op_ctx *op, int len)
{
op->desc.enc_len = cpu_to_le32(len);
}
static inline void mv_cesa_set_mac_op_total_len(struct mv_cesa_op_ctx *op,
int len)
{
op->desc.mac_src_p &= ~CESA_SA_DESC_MAC_TOTAL_LEN_MSK;
op->desc.mac_src_p |= CESA_SA_DESC_MAC_TOTAL_LEN(len);
}
static inline void mv_cesa_set_mac_op_frag_len(struct mv_cesa_op_ctx *op,
int len)
{
op->desc.mac_digest &= ~CESA_SA_DESC_MAC_FRAG_LEN_MSK;
op->desc.mac_digest |= CESA_SA_DESC_MAC_FRAG_LEN(len);
}
static inline void mv_cesa_set_int_mask(struct mv_cesa_engine *engine,
u32 int_mask)
{
if (int_mask == engine->int_mask)
return;
writel_relaxed(int_mask, engine->regs + CESA_SA_INT_MSK);
engine->int_mask = int_mask;
}
static inline u32 mv_cesa_get_int_mask(struct mv_cesa_engine *engine)
{
return engine->int_mask;
}
static inline bool mv_cesa_mac_op_is_first_frag(const struct mv_cesa_op_ctx *op)
{
return (mv_cesa_get_op_cfg(op) & CESA_SA_DESC_CFG_FRAG_MSK) ==
CESA_SA_DESC_CFG_FIRST_FRAG;
}
int mv_cesa_queue_req(struct crypto_async_request *req,
struct mv_cesa_req *creq);
struct crypto_async_request *
mv_cesa_dequeue_req_locked(struct mv_cesa_engine *engine,
struct crypto_async_request **backlog);
static inline struct mv_cesa_engine *mv_cesa_select_engine(int weight)
{
int i;
u32 min_load = U32_MAX;
struct mv_cesa_engine *selected = NULL;
for (i = 0; i < cesa_dev->caps->nengines; i++) {
struct mv_cesa_engine *engine = cesa_dev->engines + i;
u32 load = atomic_read(&engine->load);
if (load < min_load) {
min_load = load;
selected = engine;
}
}
atomic_add(weight, &selected->load);
return selected;
}
/*
* Helper function that indicates whether a crypto request needs to be
* cleaned up or not after being enqueued using mv_cesa_queue_req().
*/
static inline int mv_cesa_req_needs_cleanup(struct crypto_async_request *req,
int ret)
{
/*
* The queue still had some space, the request was queued
* normally, so there's no need to clean it up.
*/
if (ret == -EINPROGRESS)
return false;
/*
* The queue had not space left, but since the request is
* flagged with CRYPTO_TFM_REQ_MAY_BACKLOG, it was added to
* the backlog and will be processed later. There's no need to
* clean it up.
*/
if (ret == -EBUSY && req->flags & CRYPTO_TFM_REQ_MAY_BACKLOG)
return false;
/* Request wasn't queued, we need to clean it up */
return true;
}
/* TDMA functions */
static inline void mv_cesa_req_dma_iter_init(struct mv_cesa_dma_iter *iter,
unsigned int len)
{
iter->len = len;
iter->op_len = min(len, CESA_SA_SRAM_PAYLOAD_SIZE);
iter->offset = 0;
}
static inline void mv_cesa_sg_dma_iter_init(struct mv_cesa_sg_dma_iter *iter,
struct scatterlist *sg,
enum dma_data_direction dir)
{
iter->op_offset = 0;
iter->offset = 0;
iter->sg = sg;
iter->dir = dir;
}
static inline unsigned int
mv_cesa_req_dma_iter_transfer_len(struct mv_cesa_dma_iter *iter,
struct mv_cesa_sg_dma_iter *sgiter)
{
return min(iter->op_len - sgiter->op_offset,
sg_dma_len(sgiter->sg) - sgiter->offset);
}
bool mv_cesa_req_dma_iter_next_transfer(struct mv_cesa_dma_iter *chain,
struct mv_cesa_sg_dma_iter *sgiter,
unsigned int len);
static inline bool mv_cesa_req_dma_iter_next_op(struct mv_cesa_dma_iter *iter)
{
iter->offset += iter->op_len;
iter->op_len = min(iter->len - iter->offset,
CESA_SA_SRAM_PAYLOAD_SIZE);
return iter->op_len;
}
void mv_cesa_dma_step(struct mv_cesa_req *dreq);
static inline int mv_cesa_dma_process(struct mv_cesa_req *dreq,
u32 status)
{
if (!(status & CESA_SA_INT_ACC0_IDMA_DONE))
return -EINPROGRESS;
if (status & CESA_SA_INT_IDMA_OWN_ERR)
return -EINVAL;
return 0;
}
void mv_cesa_dma_prepare(struct mv_cesa_req *dreq,
struct mv_cesa_engine *engine);
void mv_cesa_dma_cleanup(struct mv_cesa_req *dreq);
void mv_cesa_tdma_chain(struct mv_cesa_engine *engine,
struct mv_cesa_req *dreq);
int mv_cesa_tdma_process(struct mv_cesa_engine *engine, u32 status);
static inline void
mv_cesa_tdma_desc_iter_init(struct mv_cesa_tdma_chain *chain)
{
memset(chain, 0, sizeof(*chain));
}
int mv_cesa_dma_add_iv_op(struct mv_cesa_tdma_chain *chain, dma_addr_t src,
u32 size, u32 flags, gfp_t gfp_flags);
struct mv_cesa_op_ctx *mv_cesa_dma_add_op(struct mv_cesa_tdma_chain *chain,
const struct mv_cesa_op_ctx *op_templ,
bool skip_ctx,
gfp_t flags);
int mv_cesa_dma_add_data_transfer(struct mv_cesa_tdma_chain *chain,
dma_addr_t dst, dma_addr_t src, u32 size,
u32 flags, gfp_t gfp_flags);
int mv_cesa_dma_add_dummy_launch(struct mv_cesa_tdma_chain *chain, gfp_t flags);
int mv_cesa_dma_add_dummy_end(struct mv_cesa_tdma_chain *chain, gfp_t flags);
int mv_cesa_dma_add_op_transfers(struct mv_cesa_tdma_chain *chain,
struct mv_cesa_dma_iter *dma_iter,
struct mv_cesa_sg_dma_iter *sgiter,
gfp_t gfp_flags);
/* Algorithm definitions */
extern struct ahash_alg mv_md5_alg;
extern struct ahash_alg mv_sha1_alg;
extern struct ahash_alg mv_sha256_alg;
extern struct ahash_alg mv_ahmac_md5_alg;
extern struct ahash_alg mv_ahmac_sha1_alg;
extern struct ahash_alg mv_ahmac_sha256_alg;
extern struct crypto_alg mv_cesa_ecb_des_alg;
extern struct crypto_alg mv_cesa_cbc_des_alg;
extern struct crypto_alg mv_cesa_ecb_des3_ede_alg;
extern struct crypto_alg mv_cesa_cbc_des3_ede_alg;
extern struct crypto_alg mv_cesa_ecb_aes_alg;
extern struct crypto_alg mv_cesa_cbc_aes_alg;
#endif /* __MARVELL_CESA_H__ */
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