/**
* cnstr_shdsc_ablkcipher_decap - ablkcipher decapsulation shared descriptor
* @desc: pointer to buffer used for descriptor construction
* @cdata: pointer to block cipher transform definitions
* Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
* with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128.
* @ivsize: initialization vector size
* @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
* @ctx1_iv_off: IV offset in CONTEXT1 register
*/
void cnstr_shdsc_ablkcipher_decap(u32 * const desc, struct alginfo *cdata,
unsigned int ivsize, const bool is_rfc3686,
const u32 ctx1_iv_off)
{
u32 *key_jump_cmd;
init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);
/* Skip if already shared */
key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
JUMP_COND_SHRD);
/* Load class1 key only */
append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
/* Load nonce into CONTEXT1 reg */
if (is_rfc3686) {
u8 *nonce = cdata->key_virt + cdata->keylen;
append_load_as_imm(desc, nonce, CTR_RFC3686_NONCE_SIZE,
LDST_CLASS_IND_CCB |
LDST_SRCDST_BYTE_OUTFIFO | LDST_IMM);
append_move(desc, MOVE_WAITCOMP | MOVE_SRC_OUTFIFO |
MOVE_DEST_CLASS1CTX | (16 << MOVE_OFFSET_SHIFT) |
(CTR_RFC3686_NONCE_SIZE << MOVE_LEN_SHIFT));
}
set_jump_tgt_here(desc, key_jump_cmd);
/* load IV */
append_seq_load(desc, ivsize, LDST_SRCDST_BYTE_CONTEXT |
LDST_CLASS_1_CCB | (ctx1_iv_off << LDST_OFFSET_SHIFT));
/* Load counter into CONTEXT1 reg */
if (is_rfc3686)
append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB |
LDST_SRCDST_BYTE_CONTEXT |
((ctx1_iv_off + CTR_RFC3686_IV_SIZE) <<
LDST_OFFSET_SHIFT));
/* Choose operation */
if (ctx1_iv_off)
append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
OP_ALG_DECRYPT);
else
append_dec_op1(desc, cdata->algtype);
/* Perform operation */
ablkcipher_append_src_dst(desc);
#ifdef DEBUG
print_hex_dump(KERN_ERR,
"ablkcipher dec shdesc@" __stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
static void init_sh_desc_key_aead(u32 * const desc,
struct alginfo * const cdata,
struct alginfo * const adata,
const bool is_rfc3686, u32 *nonce)
{
u32 *key_jump_cmd;
unsigned int enckeylen = cdata->keylen;
/* Note: Context registers are saved. */
init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);
/* Skip if already shared */
key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
JUMP_COND_SHRD);
/*
* RFC3686 specific:
* | key = {AUTH_KEY, ENC_KEY, NONCE}
* | enckeylen = encryption key size + nonce size
*/
if (is_rfc3686)
enckeylen -= CTR_RFC3686_NONCE_SIZE;
if (adata->key_inline)
append_key_as_imm(desc, adata->key_virt, adata->keylen_pad,
adata->keylen, CLASS_2 |
KEY_DEST_MDHA_SPLIT | KEY_ENC);
else
append_key(desc, adata->key_dma, adata->keylen, CLASS_2 |
KEY_DEST_MDHA_SPLIT | KEY_ENC);
if (cdata->key_inline)
append_key_as_imm(desc, cdata->key_virt, enckeylen,
enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
else
append_key(desc, cdata->key_dma, enckeylen, CLASS_1 |
KEY_DEST_CLASS_REG);
/* Load Counter into CONTEXT1 reg */
if (is_rfc3686) {
append_load_as_imm(desc, nonce, CTR_RFC3686_NONCE_SIZE,
LDST_CLASS_IND_CCB |
LDST_SRCDST_BYTE_OUTFIFO | LDST_IMM);
append_move(desc,
MOVE_SRC_OUTFIFO |
MOVE_DEST_CLASS1CTX |
(16 << MOVE_OFFSET_SHIFT) |
(CTR_RFC3686_NONCE_SIZE << MOVE_LEN_SHIFT));
}
set_jump_tgt_here(desc, key_jump_cmd);
}
void cubepos::append_moveseq(char*&p,const moveseq&seq){
*p= 0;
for(unsigned int i= 0;i<seq.size();i++)
append_move(p,seq[i]);
}
/**
* cnstr_shdsc_rfc4543_decap - IPSec ESP gmac decapsulation shared descriptor
* (non-protocol).
* @desc: pointer to buffer used for descriptor construction
* @cdata: pointer to block cipher transform definitions
* Valid algorithm values - OP_ALG_ALGSEL_AES ANDed with OP_ALG_AAI_GCM.
* @icvsize: integrity check value (ICV) size (truncated or full)
*/
void cnstr_shdsc_rfc4543_decap(u32 * const desc, struct alginfo *cdata,
unsigned int icvsize)
{
u32 *key_jump_cmd, *read_move_cmd, *write_move_cmd;
init_sh_desc(desc, HDR_SHARE_SERIAL);
/* Skip key loading if it is loaded due to sharing */
key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
JUMP_COND_SHRD);
if (cdata->key_inline)
append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
else
append_key(desc, cdata->key_dma, cdata->keylen, CLASS_1 |
KEY_DEST_CLASS_REG);
set_jump_tgt_here(desc, key_jump_cmd);
/* Class 1 operation */
append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
OP_ALG_DECRYPT | OP_ALG_ICV_ON);
/* assoclen + cryptlen = seqoutlen */
append_math_sub(desc, REG3, SEQOUTLEN, REG0, CAAM_CMD_SZ);
/*
* MOVE_LEN opcode is not available in all SEC HW revisions,
* thus need to do some magic, i.e. self-patch the descriptor
* buffer.
*/
read_move_cmd = append_move(desc, MOVE_SRC_DESCBUF | MOVE_DEST_MATH3 |
(0x6 << MOVE_LEN_SHIFT));
write_move_cmd = append_move(desc, MOVE_SRC_MATH3 | MOVE_DEST_DESCBUF |
(0x8 << MOVE_LEN_SHIFT));
/* Will read assoclen + cryptlen bytes */
append_math_sub(desc, VARSEQINLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);
/* Will write assoclen + cryptlen bytes */
append_math_sub(desc, VARSEQOUTLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);
/* Store payload data */
append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | FIFOLDST_VLF);
/* In-snoop assoclen + cryptlen data */
append_seq_fifo_load(desc, 0, FIFOLD_CLASS_BOTH | FIFOLDST_VLF |
FIFOLD_TYPE_AAD | FIFOLD_TYPE_LAST2FLUSH1);
set_move_tgt_here(desc, read_move_cmd);
set_move_tgt_here(desc, write_move_cmd);
append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
/* Move payload data to OFIFO */
append_move(desc, MOVE_SRC_INFIFO_CL | MOVE_DEST_OUTFIFO);
append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO);
/* Read ICV */
append_seq_fifo_load(desc, icvsize, FIFOLD_CLASS_CLASS1 |
FIFOLD_TYPE_ICV | FIFOLD_TYPE_LAST1);
#ifdef DEBUG
print_hex_dump(KERN_ERR,
"rfc4543 dec shdesc@" __stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
/**
* cnstr_shdsc_aead_null_encap - IPSec ESP encapsulation shared descriptor
* (non-protocol) with no (null) encryption.
* @desc: pointer to buffer used for descriptor construction
* @adata: pointer to authentication transform definitions. Note that since a
* split key is to be used, the size of the split key itself is
* specified. Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1,
* SHA224, SHA256, SHA384, SHA512} ANDed with OP_ALG_AAI_HMAC_PRECOMP.
* @icvsize: integrity check value (ICV) size (truncated or full)
*
* Note: Requires an MDHA split key.
*/
void cnstr_shdsc_aead_null_encap(u32 * const desc, struct alginfo *adata,
unsigned int icvsize)
{
u32 *key_jump_cmd, *read_move_cmd, *write_move_cmd;
init_sh_desc(desc, HDR_SHARE_SERIAL);
/* Skip if already shared */
key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
JUMP_COND_SHRD);
if (adata->key_inline)
append_key_as_imm(desc, adata->key_virt, adata->keylen_pad,
adata->keylen, CLASS_2 | KEY_DEST_MDHA_SPLIT |
KEY_ENC);
else
append_key(desc, adata->key_dma, adata->keylen, CLASS_2 |
KEY_DEST_MDHA_SPLIT | KEY_ENC);
set_jump_tgt_here(desc, key_jump_cmd);
/* assoclen + cryptlen = seqinlen */
append_math_sub(desc, REG3, SEQINLEN, REG0, CAAM_CMD_SZ);
/* Prepare to read and write cryptlen + assoclen bytes */
append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ);
append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);
/*
* MOVE_LEN opcode is not available in all SEC HW revisions,
* thus need to do some magic, i.e. self-patch the descriptor
* buffer.
*/
read_move_cmd = append_move(desc, MOVE_SRC_DESCBUF |
MOVE_DEST_MATH3 |
(0x6 << MOVE_LEN_SHIFT));
write_move_cmd = append_move(desc, MOVE_SRC_MATH3 |
MOVE_DEST_DESCBUF |
MOVE_WAITCOMP |
(0x8 << MOVE_LEN_SHIFT));
/* Class 2 operation */
append_operation(desc, adata->algtype | OP_ALG_AS_INITFINAL |
OP_ALG_ENCRYPT);
/* Read and write cryptlen bytes */
aead_append_src_dst(desc, FIFOLD_TYPE_MSG | FIFOLD_TYPE_FLUSH1);
set_move_tgt_here(desc, read_move_cmd);
set_move_tgt_here(desc, write_move_cmd);
append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
append_move(desc, MOVE_SRC_INFIFO_CL | MOVE_DEST_OUTFIFO |
MOVE_AUX_LS);
/* Write ICV */
append_seq_store(desc, icvsize, LDST_CLASS_2_CCB |
LDST_SRCDST_BYTE_CONTEXT);
#ifdef DEBUG
print_hex_dump(KERN_ERR,
"aead null enc shdesc@" __stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
/**
* cnstr_shdsc_aead_givencap - IPSec ESP encapsulation shared descriptor
* (non-protocol) with HW-generated initialization
* vector.
* @desc: pointer to buffer used for descriptor construction
* @cdata: pointer to block cipher transform definitions
* Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
* with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128.
* @adata: pointer to authentication transform definitions. Note that since a
* split key is to be used, the size of the split key itself is
* specified. Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1,
* SHA224, SHA256, SHA384, SHA512} ANDed with OP_ALG_AAI_HMAC_PRECOMP.
* @ivsize: initialization vector size
* @icvsize: integrity check value (ICV) size (truncated or full)
* @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
* @nonce: pointer to rfc3686 nonce
* @ctx1_iv_off: IV offset in CONTEXT1 register
* @is_qi: true when called from caam/qi
*
* Note: Requires an MDHA split key.
*/
void cnstr_shdsc_aead_givencap(u32 * const desc, struct alginfo *cdata,
struct alginfo *adata, unsigned int ivsize,
unsigned int icvsize, const bool is_rfc3686,
u32 *nonce, const u32 ctx1_iv_off,
const bool is_qi)
{
u32 geniv, moveiv;
/* Note: Context registers are saved. */
init_sh_desc_key_aead(desc, cdata, adata, is_rfc3686, nonce);
if (is_qi) {
u32 *wait_load_cmd;
/* REG3 = assoclen */
append_seq_load(desc, 4, LDST_CLASS_DECO |
LDST_SRCDST_WORD_DECO_MATH3 |
(4 << LDST_OFFSET_SHIFT));
wait_load_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
JUMP_COND_CALM | JUMP_COND_NCP |
JUMP_COND_NOP | JUMP_COND_NIP |
JUMP_COND_NIFP);
set_jump_tgt_here(desc, wait_load_cmd);
}
if (is_rfc3686) {
if (is_qi)
append_seq_load(desc, ivsize, LDST_CLASS_1_CCB |
LDST_SRCDST_BYTE_CONTEXT |
(ctx1_iv_off << LDST_OFFSET_SHIFT));
goto copy_iv;
}
/* Generate IV */
geniv = NFIFOENTRY_STYPE_PAD | NFIFOENTRY_DEST_DECO |
NFIFOENTRY_DTYPE_MSG | NFIFOENTRY_LC1 |
NFIFOENTRY_PTYPE_RND | (ivsize << NFIFOENTRY_DLEN_SHIFT);
append_load_imm_u32(desc, geniv, LDST_CLASS_IND_CCB |
LDST_SRCDST_WORD_INFO_FIFO | LDST_IMM);
append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
append_move(desc, MOVE_WAITCOMP |
MOVE_SRC_INFIFO | MOVE_DEST_CLASS1CTX |
(ctx1_iv_off << MOVE_OFFSET_SHIFT) |
(ivsize << MOVE_LEN_SHIFT));
append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO);
copy_iv:
/* Copy IV to class 1 context */
append_move(desc, MOVE_SRC_CLASS1CTX | MOVE_DEST_OUTFIFO |
(ctx1_iv_off << MOVE_OFFSET_SHIFT) |
(ivsize << MOVE_LEN_SHIFT));
/* Return to encryption */
append_operation(desc, adata->algtype | OP_ALG_AS_INITFINAL |
OP_ALG_ENCRYPT);
/* Read and write assoclen bytes */
append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ);
append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);
/* Skip assoc data */
append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF);
/* read assoc before reading payload */
append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_MSG |
KEY_VLF);
/* Copy iv from outfifo to class 2 fifo */
moveiv = NFIFOENTRY_STYPE_OFIFO | NFIFOENTRY_DEST_CLASS2 |
NFIFOENTRY_DTYPE_MSG | (ivsize << NFIFOENTRY_DLEN_SHIFT);
append_load_imm_u32(desc, moveiv, LDST_CLASS_IND_CCB |
LDST_SRCDST_WORD_INFO_FIFO | LDST_IMM);
append_load_imm_u32(desc, ivsize, LDST_CLASS_2_CCB |
LDST_SRCDST_WORD_DATASZ_REG | LDST_IMM);
/* Load Counter into CONTEXT1 reg */
if (is_rfc3686)
append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB |
LDST_SRCDST_BYTE_CONTEXT |
((ctx1_iv_off + CTR_RFC3686_IV_SIZE) <<
LDST_OFFSET_SHIFT));
/* Class 1 operation */
append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
OP_ALG_ENCRYPT);
/* Will write ivsize + cryptlen */
append_math_add(desc, VARSEQOUTLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
/* Not need to reload iv */
append_seq_fifo_load(desc, ivsize,
FIFOLD_CLASS_SKIP);
/* Will read cryptlen */
append_math_add(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
append_seq_fifo_load(desc, 0, FIFOLD_CLASS_BOTH | KEY_VLF |
FIFOLD_TYPE_MSG1OUT2 | FIFOLD_TYPE_LASTBOTH);
append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | KEY_VLF);
/* Write ICV */
append_seq_store(desc, icvsize, LDST_CLASS_2_CCB |
LDST_SRCDST_BYTE_CONTEXT);
#ifdef DEBUG
print_hex_dump(KERN_ERR,
"aead givenc shdesc@" __stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
/**
* cnstr_shdsc_aead_decap - IPSec ESP decapsulation shared descriptor
* (non-protocol).
* @desc: pointer to buffer used for descriptor construction
* @cdata: pointer to block cipher transform definitions
* Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
* with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128.
* @adata: pointer to authentication transform definitions. Note that since a
* split key is to be used, the size of the split key itself is
* specified. Valid algorithm values - one of OP_ALG_ALGSEL_{MD5, SHA1,
* SHA224, SHA256, SHA384, SHA512} ANDed with OP_ALG_AAI_HMAC_PRECOMP.
* @ivsize: initialization vector size
* @icvsize: integrity check value (ICV) size (truncated or full)
* @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
* @nonce: pointer to rfc3686 nonce
* @ctx1_iv_off: IV offset in CONTEXT1 register
* @is_qi: true when called from caam/qi
*
* Note: Requires an MDHA split key.
*/
void cnstr_shdsc_aead_decap(u32 * const desc, struct alginfo *cdata,
struct alginfo *adata, unsigned int ivsize,
unsigned int icvsize, const bool geniv,
const bool is_rfc3686, u32 *nonce,
const u32 ctx1_iv_off, const bool is_qi)
{
/* Note: Context registers are saved. */
init_sh_desc_key_aead(desc, cdata, adata, is_rfc3686, nonce);
/* Class 2 operation */
append_operation(desc, adata->algtype | OP_ALG_AS_INITFINAL |
OP_ALG_DECRYPT | OP_ALG_ICV_ON);
if (is_qi) {
u32 *wait_load_cmd;
/* REG3 = assoclen */
append_seq_load(desc, 4, LDST_CLASS_DECO |
LDST_SRCDST_WORD_DECO_MATH3 |
(4 << LDST_OFFSET_SHIFT));
wait_load_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
JUMP_COND_CALM | JUMP_COND_NCP |
JUMP_COND_NOP | JUMP_COND_NIP |
JUMP_COND_NIFP);
set_jump_tgt_here(desc, wait_load_cmd);
if (!geniv)
append_seq_load(desc, ivsize, LDST_CLASS_1_CCB |
LDST_SRCDST_BYTE_CONTEXT |
(ctx1_iv_off << LDST_OFFSET_SHIFT));
}
/* Read and write assoclen bytes */
append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ);
if (geniv)
append_math_add_imm_u32(desc, VARSEQOUTLEN, REG3, IMM, ivsize);
else
append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);
/* Skip assoc data */
append_seq_fifo_store(desc, 0, FIFOST_TYPE_SKIP | FIFOLDST_VLF);
/* read assoc before reading payload */
append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_MSG |
KEY_VLF);
if (geniv) {
append_seq_load(desc, ivsize, LDST_CLASS_1_CCB |
LDST_SRCDST_BYTE_CONTEXT |
(ctx1_iv_off << LDST_OFFSET_SHIFT));
append_move(desc, MOVE_SRC_CLASS1CTX | MOVE_DEST_CLASS2INFIFO |
(ctx1_iv_off << MOVE_OFFSET_SHIFT) | ivsize);
}
/* Load Counter into CONTEXT1 reg */
if (is_rfc3686)
append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB |
LDST_SRCDST_BYTE_CONTEXT |
((ctx1_iv_off + CTR_RFC3686_IV_SIZE) <<
LDST_OFFSET_SHIFT));
/* Choose operation */
if (ctx1_iv_off)
append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
OP_ALG_DECRYPT);
else
append_dec_op1(desc, cdata->algtype);
/* Read and write cryptlen bytes */
append_math_add(desc, VARSEQINLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);
append_math_add(desc, VARSEQOUTLEN, SEQOUTLEN, REG0, CAAM_CMD_SZ);
aead_append_src_dst(desc, FIFOLD_TYPE_MSG);
/* Load ICV */
append_seq_fifo_load(desc, icvsize, FIFOLD_CLASS_CLASS2 |
FIFOLD_TYPE_LAST2 | FIFOLD_TYPE_ICV);
#ifdef DEBUG
print_hex_dump(KERN_ERR, "aead dec shdesc@" __stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
/**
* cnstr_shdsc_ablkcipher_givencap - ablkcipher encapsulation shared descriptor
* with HW-generated initialization vector.
* @desc: pointer to buffer used for descriptor construction
* @cdata: pointer to block cipher transform definitions
* Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
* with OP_ALG_AAI_CBC.
* @ivsize: initialization vector size
* @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
* @ctx1_iv_off: IV offset in CONTEXT1 register
*/
void cnstr_shdsc_ablkcipher_givencap(u32 * const desc, struct alginfo *cdata,
unsigned int ivsize, const bool is_rfc3686,
const u32 ctx1_iv_off)
{
u32 *key_jump_cmd, geniv;
init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);
/* Skip if already shared */
key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
JUMP_COND_SHRD);
/* Load class1 key only */
append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
/* Load Nonce into CONTEXT1 reg */
if (is_rfc3686) {
u8 *nonce = cdata->key_virt + cdata->keylen;
append_load_as_imm(desc, nonce, CTR_RFC3686_NONCE_SIZE,
LDST_CLASS_IND_CCB |
LDST_SRCDST_BYTE_OUTFIFO | LDST_IMM);
append_move(desc, MOVE_WAITCOMP | MOVE_SRC_OUTFIFO |
MOVE_DEST_CLASS1CTX | (16 << MOVE_OFFSET_SHIFT) |
(CTR_RFC3686_NONCE_SIZE << MOVE_LEN_SHIFT));
}
set_jump_tgt_here(desc, key_jump_cmd);
/* Generate IV */
geniv = NFIFOENTRY_STYPE_PAD | NFIFOENTRY_DEST_DECO |
NFIFOENTRY_DTYPE_MSG | NFIFOENTRY_LC1 | NFIFOENTRY_PTYPE_RND |
(ivsize << NFIFOENTRY_DLEN_SHIFT);
append_load_imm_u32(desc, geniv, LDST_CLASS_IND_CCB |
LDST_SRCDST_WORD_INFO_FIFO | LDST_IMM);
append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
append_move(desc, MOVE_WAITCOMP | MOVE_SRC_INFIFO |
MOVE_DEST_CLASS1CTX | (ivsize << MOVE_LEN_SHIFT) |
(ctx1_iv_off << MOVE_OFFSET_SHIFT));
append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO);
/* Copy generated IV to memory */
append_seq_store(desc, ivsize, LDST_SRCDST_BYTE_CONTEXT |
LDST_CLASS_1_CCB | (ctx1_iv_off << LDST_OFFSET_SHIFT));
/* Load Counter into CONTEXT1 reg */
if (is_rfc3686)
append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB |
LDST_SRCDST_BYTE_CONTEXT |
((ctx1_iv_off + CTR_RFC3686_IV_SIZE) <<
LDST_OFFSET_SHIFT));
if (ctx1_iv_off)
append_jump(desc, JUMP_JSL | JUMP_TEST_ALL | JUMP_COND_NCP |
(1 << JUMP_OFFSET_SHIFT));
/* Load operation */
append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
OP_ALG_ENCRYPT);
/* Perform operation */
ablkcipher_append_src_dst(desc);
#ifdef DEBUG
print_hex_dump(KERN_ERR,
"ablkcipher givenc shdesc@" __stringify(__LINE__) ": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
#endif
}
