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Commit 1acebad3 authored by Yuan Kang's avatar Yuan Kang Committed by Herbert Xu
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crypto: caam - faster aead implementation 

Job descriptors only contain header and seq pointers.

Other commands are stored in separate shared descriptors
for encrypt, decrypt and givencrypt, stored as arrays
in caam_ctx.

This requires additional macros to create math commands
to calculate assoclen and cryptlen.
Signed-off-by: default avatarYuan Kang <Yuan.Kang@freescale.com>
Signed-off-by: default avatarKim Phillips <kim.phillips@freescale.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 885e9e2f
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Inline Side-by-side
Showing with 832 additions and 330 deletions
drivers/crypto/caam/caamalg.c
View file @ 1acebad3
......@@ -62,10 +62,16 @@
#define CAAM_MAX_IV_LENGTH 16
/* length of descriptors text */
#define DESC_AEAD_SHARED_TEXT_LEN 4
#define DESC_AEAD_ENCRYPT_TEXT_LEN 21
#define DESC_AEAD_DECRYPT_TEXT_LEN 24
#define DESC_AEAD_GIVENCRYPT_TEXT_LEN 27
#define DESC_JOB_IO_LEN (CAAM_CMD_SZ * 3 + CAAM_PTR_SZ * 3)
#define DESC_AEAD_BASE (4 * CAAM_CMD_SZ)
#define DESC_AEAD_ENC_LEN (DESC_AEAD_BASE + 16 * CAAM_CMD_SZ)
#define DESC_AEAD_DEC_LEN (DESC_AEAD_BASE + 21 * CAAM_CMD_SZ)
#define DESC_AEAD_GIVENC_LEN (DESC_AEAD_ENC_LEN + 7 * CAAM_CMD_SZ)
#define DESC_MAX_USED_BYTES (DESC_AEAD_GIVENC_LEN + \
CAAM_MAX_KEY_SIZE)
#define DESC_MAX_USED_LEN (DESC_MAX_USED_BYTES / CAAM_CMD_SZ)
#ifdef DEBUG
/* for print_hex_dumps with line references */
......@@ -76,17 +82,77 @@
#define debug(format, arg...)
#endif
/* Set DK bit in class 1 operation if shared */
static inline void append_dec_op1(u32 *desc, u32 type)
{
u32 *jump_cmd, *uncond_jump_cmd;
jump_cmd = append_jump(desc, JUMP_TEST_ALL | JUMP_COND_SHRD);
append_operation(desc, type | OP_ALG_AS_INITFINAL |
OP_ALG_DECRYPT);
uncond_jump_cmd = append_jump(desc, JUMP_TEST_ALL);
set_jump_tgt_here(desc, jump_cmd);
append_operation(desc, type | OP_ALG_AS_INITFINAL |
OP_ALG_DECRYPT | OP_ALG_AAI_DK);
set_jump_tgt_here(desc, uncond_jump_cmd);
}
/*
* Wait for completion of class 1 key loading before allowing
* error propagation
*/
static inline void append_dec_shr_done(u32 *desc)
{
u32 *jump_cmd;
jump_cmd = append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TEST_ALL);
set_jump_tgt_here(desc, jump_cmd);
append_cmd(desc, SET_OK_PROP_ERRORS | CMD_LOAD);
}
/*
* For aead functions, read payload and write payload,
* both of which are specified in req->src and req->dst
*/
static inline void aead_append_src_dst(u32 *desc, u32 msg_type)
{
append_seq_fifo_load(desc, 0, FIFOLD_CLASS_BOTH |
KEY_VLF | msg_type | FIFOLD_TYPE_LASTBOTH);
append_seq_fifo_store(desc, 0, FIFOST_TYPE_MESSAGE_DATA | KEY_VLF);
}
/*
* For aead encrypt and decrypt, read iv for both classes
*/
static inline void aead_append_ld_iv(u32 *desc, int ivsize)
{
append_cmd(desc, CMD_SEQ_LOAD | LDST_SRCDST_BYTE_CONTEXT |
LDST_CLASS_1_CCB | ivsize);
append_move(desc, MOVE_SRC_CLASS1CTX | MOVE_DEST_CLASS2INFIFO | ivsize);
}
/*
* If all data, including src (with assoc and iv) or dst (with iv only) are
* contiguous
*/
#define GIV_SRC_CONTIG 1
#define GIV_DST_CONTIG (1 << 1)
/*
* per-session context
*/
struct caam_ctx {
struct device *jrdev;
u32 *sh_desc;
dma_addr_t shared_desc_phys;
u32 sh_desc_enc[DESC_MAX_USED_LEN];
u32 sh_desc_dec[DESC_MAX_USED_LEN];
u32 sh_desc_givenc[DESC_MAX_USED_LEN];
dma_addr_t sh_desc_enc_dma;
dma_addr_t sh_desc_dec_dma;
dma_addr_t sh_desc_givenc_dma;
u32 class1_alg_type;
u32 class2_alg_type;
u32 alg_op;
u8 *key;
u8 key[CAAM_MAX_KEY_SIZE];
dma_addr_t key_dma;
unsigned int enckeylen;
unsigned int split_key_len;
......@@ -94,12 +160,275 @@ struct caam_ctx {
unsigned int authsize;
};
static void append_key_aead(u32 *desc, struct caam_ctx *ctx,
int keys_fit_inline)
{
if (keys_fit_inline) {
append_key_as_imm(desc, ctx->key, ctx->split_key_pad_len,
ctx->split_key_len, CLASS_2 |
KEY_DEST_MDHA_SPLIT | KEY_ENC);
append_key_as_imm(desc, (void *)ctx->key +
ctx->split_key_pad_len, ctx->enckeylen,
ctx->enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
} else {
append_key(desc, ctx->key_dma, ctx->split_key_len, CLASS_2 |
KEY_DEST_MDHA_SPLIT | KEY_ENC);
append_key(desc, ctx->key_dma + ctx->split_key_pad_len,
ctx->enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
}
}
static void init_sh_desc_key_aead(u32 *desc, struct caam_ctx *ctx,
int keys_fit_inline)
{
u32 *key_jump_cmd;
init_sh_desc(desc, HDR_SHARE_WAIT);
/* Skip if already shared */
key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
JUMP_COND_SHRD);
append_key_aead(desc, ctx, keys_fit_inline);
set_jump_tgt_here(desc, key_jump_cmd);
/* Propagate errors from shared to job descriptor */
append_cmd(desc, SET_OK_PROP_ERRORS | CMD_LOAD);
}
static int aead_set_sh_desc(struct crypto_aead *aead)
{
struct aead_tfm *tfm = &aead->base.crt_aead;
struct caam_ctx *ctx = crypto_aead_ctx(aead);
struct device *jrdev = ctx->jrdev;
bool keys_fit_inline = 0;
u32 *key_jump_cmd, *jump_cmd;
u32 geniv, moveiv;
u32 *desc;
if (!ctx->enckeylen || !ctx->authsize)
return 0;
/*
* Job Descriptor and Shared Descriptors
* must all fit into the 64-word Descriptor h/w Buffer
*/
if (DESC_AEAD_ENC_LEN + DESC_JOB_IO_LEN +
ctx->split_key_pad_len + ctx->enckeylen <=
CAAM_DESC_BYTES_MAX)
keys_fit_inline = 1;
/* aead_encrypt shared descriptor */
desc = ctx->sh_desc_enc;
init_sh_desc_key_aead(desc, ctx, keys_fit_inline);
/* Class 2 operation */
append_operation(desc, ctx->class2_alg_type |
OP_ALG_AS_INITFINAL | OP_ALG_ENCRYPT);
/* cryptlen = seqoutlen - authsize */
append_math_sub_imm_u32(desc, REG3, SEQOUTLEN, IMM, ctx->authsize);
/* assoclen + cryptlen = seqinlen - ivsize */
append_math_sub_imm_u32(desc, REG2, SEQINLEN, IMM, tfm->ivsize);
/* assoclen + cryptlen = (assoclen + cryptlen) - cryptlen */
append_math_sub(desc, VARSEQINLEN, REG2, REG3, CAAM_CMD_SZ);
/* read assoc before reading payload */
append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_MSG |
KEY_VLF);
aead_append_ld_iv(desc, tfm->ivsize);
/* Class 1 operation */
append_operation(desc, ctx->class1_alg_type |
OP_ALG_AS_INITFINAL | OP_ALG_ENCRYPT);
/* Read and write cryptlen bytes */
append_math_add(desc, VARSEQINLEN, ZERO, REG3, CAAM_CMD_SZ);
append_math_add(desc, VARSEQOUTLEN, ZERO, REG3, CAAM_CMD_SZ);
aead_append_src_dst(desc, FIFOLD_TYPE_MSG1OUT2);
/* Write ICV */
append_seq_store(desc, ctx->authsize, LDST_CLASS_2_CCB |
LDST_SRCDST_BYTE_CONTEXT);
ctx->sh_desc_enc_dma = dma_map_single(jrdev, desc,
desc_bytes(desc),
DMA_TO_DEVICE);
if (dma_mapping_error(jrdev, ctx->sh_desc_enc_dma)) {
dev_err(jrdev, "unable to map shared descriptor\n");
return -ENOMEM;
}
#ifdef DEBUG
print_hex_dump(KERN_ERR, "aead enc shdesc@"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc,
desc_bytes(desc), 1);
#endif
/*
* Job Descriptor and Shared Descriptors
* must all fit into the 64-word Descriptor h/w Buffer
*/
if (DESC_AEAD_DEC_LEN + DESC_JOB_IO_LEN +
ctx->split_key_pad_len + ctx->enckeylen <=
CAAM_DESC_BYTES_MAX)
keys_fit_inline = 1;
desc = ctx->sh_desc_dec;
/* aead_decrypt shared descriptor */
init_sh_desc(desc, HDR_SHARE_WAIT);
/* Skip if already shared */
key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
JUMP_COND_SHRD);
append_key_aead(desc, ctx, keys_fit_inline);
/* Only propagate error immediately if shared */
jump_cmd = append_jump(desc, JUMP_TEST_ALL);
set_jump_tgt_here(desc, key_jump_cmd);
append_cmd(desc, SET_OK_PROP_ERRORS | CMD_LOAD);
set_jump_tgt_here(desc, jump_cmd);
/* Class 2 operation */
append_operation(desc, ctx->class2_alg_type |
OP_ALG_AS_INITFINAL | OP_ALG_DECRYPT | OP_ALG_ICV_ON);
/* assoclen + cryptlen = seqinlen - ivsize */
append_math_sub_imm_u32(desc, REG3, SEQINLEN, IMM,
ctx->authsize + tfm->ivsize)
/* assoclen = (assoclen + cryptlen) - cryptlen */
append_math_sub(desc, REG2, SEQOUTLEN, REG0, CAAM_CMD_SZ);
append_math_sub(desc, VARSEQINLEN, REG3, REG2, CAAM_CMD_SZ);
/* read assoc before reading payload */
append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_MSG |
KEY_VLF);
aead_append_ld_iv(desc, tfm->ivsize);
append_dec_op1(desc, ctx->class1_alg_type);
/* Read and write cryptlen bytes */
append_math_add(desc, VARSEQINLEN, ZERO, REG2, CAAM_CMD_SZ);
append_math_add(desc, VARSEQOUTLEN, ZERO, REG2, CAAM_CMD_SZ);
aead_append_src_dst(desc, FIFOLD_TYPE_MSG);
/* Load ICV */
append_seq_fifo_load(desc, ctx->authsize, FIFOLD_CLASS_CLASS2 |
FIFOLD_TYPE_LAST2 | FIFOLD_TYPE_ICV);
append_dec_shr_done(desc);
ctx->sh_desc_dec_dma = dma_map_single(jrdev, desc,
desc_bytes(desc),
DMA_TO_DEVICE);
if (dma_mapping_error(jrdev, ctx->sh_desc_dec_dma)) {
dev_err(jrdev, "unable to map shared descriptor\n");
return -ENOMEM;
}
#ifdef DEBUG
print_hex_dump(KERN_ERR, "aead dec shdesc@"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc,
desc_bytes(desc), 1);
#endif
/*
* Job Descriptor and Shared Descriptors
* must all fit into the 64-word Descriptor h/w Buffer
*/
if (DESC_AEAD_GIVENC_LEN + DESC_JOB_IO_LEN +
ctx->split_key_pad_len + ctx->enckeylen <=
CAAM_DESC_BYTES_MAX)
keys_fit_inline = 1;
/* aead_givencrypt shared descriptor */
desc = ctx->sh_desc_givenc;
init_sh_desc_key_aead(desc, ctx, keys_fit_inline);
/* Generate IV */
geniv = NFIFOENTRY_STYPE_PAD | NFIFOENTRY_DEST_DECO |
NFIFOENTRY_DTYPE_MSG | NFIFOENTRY_LC1 |
NFIFOENTRY_PTYPE_RND | (tfm->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_SRC_INFIFO |
MOVE_DEST_CLASS1CTX | (tfm->ivsize << MOVE_LEN_SHIFT));
append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO);
/* Copy IV to class 1 context */
append_move(desc, MOVE_SRC_CLASS1CTX |
MOVE_DEST_OUTFIFO | (tfm->ivsize << MOVE_LEN_SHIFT));
/* Return to encryption */
append_operation(desc, ctx->class2_alg_type |
OP_ALG_AS_INITFINAL | OP_ALG_ENCRYPT);
/* ivsize + cryptlen = seqoutlen - authsize */
append_math_sub_imm_u32(desc, REG3, SEQOUTLEN, IMM, ctx->authsize);
/* assoclen = seqinlen - (ivsize + cryptlen) */
append_math_sub(desc, VARSEQINLEN, SEQINLEN, REG3, CAAM_CMD_SZ);
/* read assoc before reading payload */
append_seq_fifo_load(desc, 0, FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_MSG |
KEY_VLF);
/* Copy iv from class 1 ctx to class 2 fifo*/
moveiv = NFIFOENTRY_STYPE_OFIFO | NFIFOENTRY_DEST_CLASS2 |
NFIFOENTRY_DTYPE_MSG | (tfm->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, tfm->ivsize, LDST_CLASS_2_CCB |
LDST_SRCDST_WORD_DATASZ_REG | LDST_IMM);
/* Class 1 operation */
append_operation(desc, ctx->class1_alg_type |
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, tfm->ivsize,
FIFOLD_CLASS_SKIP);
/* Will read cryptlen */
append_math_add(desc, VARSEQINLEN, SEQINLEN, REG0, CAAM_CMD_SZ);
aead_append_src_dst(desc, FIFOLD_TYPE_MSG1OUT2);
/* Write ICV */
append_seq_store(desc, ctx->authsize, LDST_CLASS_2_CCB |
LDST_SRCDST_BYTE_CONTEXT);
ctx->sh_desc_givenc_dma = dma_map_single(jrdev, desc,
desc_bytes(desc),
DMA_TO_DEVICE);
if (dma_mapping_error(jrdev, ctx->sh_desc_givenc_dma)) {
dev_err(jrdev, "unable to map shared descriptor\n");
return -ENOMEM;
}
#ifdef DEBUG
print_hex_dump(KERN_ERR, "aead givenc shdesc@"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc,
desc_bytes(desc), 1);
#endif
return 0;
}
static int aead_setauthsize(struct crypto_aead *authenc,
unsigned int authsize)
{
struct caam_ctx *ctx = crypto_aead_ctx(authenc);
ctx->authsize = authsize;
aead_set_sh_desc(authenc);
return 0;
}
......@@ -117,6 +446,7 @@ static void split_key_done(struct device *dev, u32 *desc, u32 err,
#ifdef DEBUG
dev_err(dev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
#endif
if (err) {
char tmp[CAAM_ERROR_STR_MAX];
......@@ -220,72 +550,6 @@ static u32 gen_split_key(struct caam_ctx *ctx, const u8 *key_in, u32 authkeylen)
return ret;
}
static int build_sh_desc_ipsec(struct caam_ctx *ctx)
{
struct device *jrdev = ctx->jrdev;
u32 *sh_desc;
u32 *jump_cmd;
bool keys_fit_inline = 0;
/*
* largest Job Descriptor and its Shared Descriptor
* must both fit into the 64-word Descriptor h/w Buffer
*/
if ((DESC_AEAD_GIVENCRYPT_TEXT_LEN +
DESC_AEAD_SHARED_TEXT_LEN) * CAAM_CMD_SZ +
ctx->split_key_pad_len + ctx->enckeylen <= CAAM_DESC_BYTES_MAX)
keys_fit_inline = 1;
/* build shared descriptor for this session */
sh_desc = kmalloc(CAAM_CMD_SZ * DESC_AEAD_SHARED_TEXT_LEN +
(keys_fit_inline ?
ctx->split_key_pad_len + ctx->enckeylen :
CAAM_PTR_SZ * 2), GFP_DMA | GFP_KERNEL);
if (!sh_desc) {
dev_err(jrdev, "could not allocate shared descriptor\n");
return -ENOMEM;
}
init_sh_desc(sh_desc, HDR_SAVECTX | HDR_SHARE_SERIAL);
jump_cmd = append_jump(sh_desc, CLASS_BOTH | JUMP_TEST_ALL |
JUMP_COND_SHRD | JUMP_COND_SELF);
/*
* process keys, starting with class 2/authentication.
*/
if (keys_fit_inline) {
append_key_as_imm(sh_desc, ctx->key, ctx->split_key_pad_len,
ctx->split_key_len,
CLASS_2 | KEY_DEST_MDHA_SPLIT | KEY_ENC);
append_key_as_imm(sh_desc, (void *)ctx->key +
ctx->split_key_pad_len, ctx->enckeylen,
ctx->enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
} else {
append_key(sh_desc, ctx->key_dma, ctx->split_key_len, CLASS_2 |
KEY_DEST_MDHA_SPLIT | KEY_ENC);
append_key(sh_desc, ctx->key_dma + ctx->split_key_pad_len,
ctx->enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
}
/* update jump cmd now that we are at the jump target */
set_jump_tgt_here(sh_desc, jump_cmd);
ctx->shared_desc_phys = dma_map_single(jrdev, sh_desc,
desc_bytes(sh_desc),
DMA_TO_DEVICE);
if (dma_mapping_error(jrdev, ctx->shared_desc_phys)) {
dev_err(jrdev, "unable to map shared descriptor\n");
kfree(sh_desc);
return -ENOMEM;
}
ctx->sh_desc = sh_desc;
return 0;
}
static int aead_setkey(struct crypto_aead *aead,
const u8 *key, unsigned int keylen)
{
......@@ -326,16 +590,9 @@ static int aead_setkey(struct crypto_aead *aead,
print_hex_dump(KERN_ERR, "key in @"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, key, keylen, 1);
#endif
ctx->key = kmalloc(ctx->split_key_pad_len + enckeylen,
GFP_KERNEL | GFP_DMA);
if (!ctx->key) {
dev_err(jrdev, "could not allocate key output memory\n");
return -ENOMEM;
}
ret = gen_split_key(ctx, key, authkeylen);
if (ret) {
kfree(ctx->key);
goto badkey;
}
......@@ -346,7 +603,6 @@ static int aead_setkey(struct crypto_aead *aead,
enckeylen, DMA_TO_DEVICE);
if (dma_mapping_error(jrdev, ctx->key_dma)) {
dev_err(jrdev, "unable to map key i/o memory\n");
kfree(ctx->key);
return -ENOMEM;
}
#ifdef DEBUG
......@@ -357,11 +613,10 @@ static int aead_setkey(struct crypto_aead *aead,
ctx->enckeylen = enckeylen;
ret = build_sh_desc_ipsec(ctx);
ret = aead_set_sh_desc(aead);
if (ret) {
dma_unmap_single(jrdev, ctx->key_dma, ctx->split_key_pad_len +
enckeylen, DMA_TO_DEVICE);
kfree(ctx->key);
}
return ret;
......@@ -379,10 +634,11 @@ struct link_tbl_entry {
};
/*
* aead_edesc - s/w-extended ipsec_esp descriptor
* aead_edesc - s/w-extended aead descriptor
* @assoc_nents: number of segments in associated data (SPI+Seq) scatterlist
* @src_nents: number of segments in input scatterlist
* @dst_nents: number of segments in output scatterlist
* @assoc_nents: number of segments in associated data (SPI+Seq) scatterlist
* @iv_dma: dma address of iv for checking continuity and link table
* @desc: h/w descriptor (variable length; must not exceed MAX_CAAM_DESCSIZE)
* @link_tbl_bytes: length of dma mapped link_tbl space
* @link_tbl_dma: bus physical mapped address of h/w link table
......@@ -392,37 +648,47 @@ struct aead_edesc {
int assoc_nents;
int src_nents;
int dst_nents;
dma_addr_t iv_dma;
int link_tbl_bytes;
dma_addr_t link_tbl_dma;
struct link_tbl_entry *link_tbl;
u32 hw_desc[0];
};
static void caam_unmap(struct device *dev, struct scatterlist *src,
struct scatterlist *dst, int src_nents, int dst_nents,
dma_addr_t iv_dma, int ivsize, dma_addr_t link_tbl_dma,
int link_tbl_bytes)
{
if (unlikely(dst != src)) {
dma_unmap_sg(dev, src, src_nents, DMA_TO_DEVICE);
dma_unmap_sg(dev, dst, dst_nents, DMA_FROM_DEVICE);
} else {
dma_unmap_sg(dev, src, src_nents, DMA_BIDIRECTIONAL);
}
if (iv_dma)
dma_unmap_single(dev, iv_dma, ivsize, DMA_TO_DEVICE);
if (link_tbl_bytes)
dma_unmap_single(dev, link_tbl_dma, link_tbl_bytes,
DMA_TO_DEVICE);
}
static void aead_unmap(struct device *dev,
struct aead_edesc *edesc,
struct aead_request *req)
{
dma_unmap_sg(dev, req->assoc, edesc->assoc_nents, DMA_TO_DEVICE);
struct crypto_aead *aead = crypto_aead_reqtfm(req);
int ivsize = crypto_aead_ivsize(aead);
if (unlikely(req->dst != req->src)) {
dma_unmap_sg(dev, req->src, edesc->src_nents,
DMA_TO_DEVICE);
dma_unmap_sg(dev, req->dst, edesc->dst_nents,
DMA_FROM_DEVICE);
} else {
dma_unmap_sg(dev, req->src, edesc->src_nents,
DMA_BIDIRECTIONAL);
}
dma_unmap_sg(dev, req->assoc, edesc->assoc_nents, DMA_TO_DEVICE);
if (edesc->link_tbl_bytes)
dma_unmap_single(dev, edesc->link_tbl_dma,
edesc->link_tbl_bytes,
DMA_TO_DEVICE);
caam_unmap(dev, req->src, req->dst,
edesc->src_nents, edesc->dst_nents,
edesc->iv_dma, ivsize, edesc->link_tbl_dma,
edesc->link_tbl_bytes);
}
/*
* ipsec_esp descriptor callbacks
*/
static void aead_encrypt_done(struct device *jrdev, u32 *desc, u32 err,
void *context)
{
......@@ -430,11 +696,12 @@ static void aead_encrypt_done(struct device *jrdev, u32 *desc, u32 err,
struct aead_edesc *edesc;
#ifdef DEBUG
struct crypto_aead *aead = crypto_aead_reqtfm(req);
int ivsize = crypto_aead_ivsize(aead);
struct caam_ctx *ctx = crypto_aead_ctx(aead);
int ivsize = crypto_aead_ivsize(aead);
dev_err(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
#endif
edesc = (struct aead_edesc *)((char *)desc -
offsetof(struct aead_edesc, hw_desc));
......@@ -472,12 +739,23 @@ static void aead_decrypt_done(struct device *jrdev, u32 *desc, u32 err,
#ifdef DEBUG
struct crypto_aead *aead = crypto_aead_reqtfm(req);
struct caam_ctx *ctx = crypto_aead_ctx(aead);
int ivsize = crypto_aead_ivsize(aead);
dev_err(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
#endif
edesc = (struct aead_edesc *)((char *)desc -
offsetof(struct aead_edesc, hw_desc));
#ifdef DEBUG
print_hex_dump(KERN_ERR, "dstiv @"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, req->iv,
ivsize, 1);
print_hex_dump(KERN_ERR, "dst @"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(req->dst),
req->cryptlen, 1);
#endif
if (err) {
char tmp[CAAM_ERROR_STR_MAX];
......@@ -506,241 +784,271 @@ static void aead_decrypt_done(struct device *jrdev, u32 *desc, u32 err,
sg->length + ctx->authsize + 16, 1);
}
#endif
kfree(edesc);
aead_request_complete(req, err);
}
static void sg_to_link_tbl_one(struct link_tbl_entry *link_tbl_ptr,
dma_addr_t dma, u32 len, u32 offset)
{
link_tbl_ptr->ptr = dma;
link_tbl_ptr->len = len;
link_tbl_ptr->reserved = 0;
link_tbl_ptr->buf_pool_id = 0;
link_tbl_ptr->offset = offset;
#ifdef DEBUG
print_hex_dump(KERN_ERR, "link_tbl_ptr@"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, link_tbl_ptr,
sizeof(struct link_tbl_entry), 1);
#endif
}
/*
* convert scatterlist to h/w link table format
* scatterlist must have been previously dma mapped
* but does not have final bit; instead, returns last entry
*/
static void sg_to_link_tbl(struct scatterlist *sg, int sg_count,
struct link_tbl_entry *link_tbl_ptr, u32 offset)
static struct link_tbl_entry *sg_to_link_tbl(struct scatterlist *sg,
int sg_count, struct link_tbl_entry
*link_tbl_ptr, u32 offset)
{
while (sg_count) {
link_tbl_ptr->ptr = sg_dma_address(sg);
link_tbl_ptr->len = sg_dma_len(sg);
link_tbl_ptr->reserved = 0;
link_tbl_ptr->buf_pool_id = 0;
link_tbl_ptr->offset = offset;
sg_to_link_tbl_one(link_tbl_ptr, sg_dma_address(sg),
sg_dma_len(sg), offset);
link_tbl_ptr++;
sg = sg_next(sg);
sg_count--;
}
return link_tbl_ptr - 1;
}
/* set Final bit (marks end of link table) */
link_tbl_ptr--;
/*
* convert scatterlist to h/w link table format
* scatterlist must have been previously dma mapped
*/
static void sg_to_link_tbl_last(struct scatterlist *sg, int sg_count,
struct link_tbl_entry *link_tbl_ptr, u32 offset)
{
link_tbl_ptr = sg_to_link_tbl(sg, sg_count, link_tbl_ptr, offset);
link_tbl_ptr->len |= 0x40000000;
}
/*
* fill in and submit ipsec_esp job descriptor
* Fill in aead job descriptor
*/
static int init_aead_job(struct aead_edesc *edesc, struct aead_request *req,
u32 encrypt,
void (*callback) (struct device *dev, u32 *desc,
u32 err, void *context))
static void init_aead_job(u32 *sh_desc, dma_addr_t ptr,
struct aead_edesc *edesc,
struct aead_request *req,
bool all_contig, bool encrypt)
{
struct crypto_aead *aead = crypto_aead_reqtfm(req);
struct caam_ctx *ctx = crypto_aead_ctx(aead);
struct device *jrdev = ctx->jrdev;
u32 *desc = edesc->hw_desc, options;
int ret, sg_count, assoc_sg_count;
int ivsize = crypto_aead_ivsize(aead);
int authsize = ctx->authsize;
dma_addr_t ptr, dst_dma, src_dma;
#ifdef DEBUG
u32 *sh_desc = ctx->sh_desc;
u32 *desc = edesc->hw_desc;
u32 out_options = 0, in_options;
dma_addr_t dst_dma, src_dma;
int len, link_tbl_index = 0;
#ifdef DEBUG
debug("assoclen %d cryptlen %d authsize %d\n",
req->assoclen, req->cryptlen, authsize);
print_hex_dump(KERN_ERR, "assoc @"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(req->assoc),
req->assoclen , 1);
print_hex_dump(KERN_ERR, "presciv@"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(req->src) - ivsize,
DUMP_PREFIX_ADDRESS, 16, 4, req->iv,
edesc->src_nents ? 100 : ivsize, 1);
print_hex_dump(KERN_ERR, "src @"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(req->src),
edesc->src_nents ? 100 : req->cryptlen + authsize, 1);
edesc->src_nents ? 100 : req->cryptlen, 1);
print_hex_dump(KERN_ERR, "shrdesc@"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, sh_desc,
desc_bytes(sh_desc), 1);
#endif
assoc_sg_count = dma_map_sg(jrdev, req->assoc, edesc->assoc_nents ?: 1,
DMA_TO_DEVICE);
if (req->src == req->dst)
sg_count = dma_map_sg(jrdev, req->src, edesc->src_nents ? : 1,
DMA_BIDIRECTIONAL);
else
sg_count = dma_map_sg(jrdev, req->src, edesc->src_nents ? : 1,
DMA_TO_DEVICE);
/* start auth operation */
append_operation(desc, ctx->class2_alg_type | OP_ALG_AS_INITFINAL |
(encrypt ? : OP_ALG_ICV_ON));
len = desc_len(sh_desc);
init_job_desc_shared(desc, ptr, len, HDR_SHARE_DEFER | HDR_REVERSE);
/* Load FIFO with data for Class 2 CHA */
options = FIFOLD_CLASS_CLASS2 | FIFOLD_TYPE_MSG;
if (!edesc->assoc_nents) {
ptr = sg_dma_address(req->assoc);
if (all_contig) {
src_dma = sg_dma_address(req->assoc);
in_options = 0;
} else {
sg_to_link_tbl(req->assoc, edesc->assoc_nents,
edesc->link_tbl, 0);
ptr = edesc->link_tbl_dma;
options |= LDST_SGF;
src_dma = edesc->link_tbl_dma;
link_tbl_index += (edesc->assoc_nents ? : 1) + 1 +
(edesc->src_nents ? : 1);
in_options = LDST_SGF;
}
append_fifo_load(desc, ptr, req->assoclen, options);
/* copy iv from cipher/class1 input context to class2 infifo */
append_move(desc, MOVE_SRC_CLASS1CTX | MOVE_DEST_CLASS2INFIFO | ivsize);
if (!encrypt) {
u32 *jump_cmd, *uncond_jump_cmd;
/* JUMP if shared */
jump_cmd = append_jump(desc, JUMP_TEST_ALL | JUMP_COND_SHRD);
/* start class 1 (cipher) operation, non-shared version */
append_operation(desc, ctx->class1_alg_type |
OP_ALG_AS_INITFINAL);
uncond_jump_cmd = append_jump(desc, 0);
set_jump_tgt_here(desc, jump_cmd);
/* start class 1 (cipher) operation, shared version */
append_operation(desc, ctx->class1_alg_type |
OP_ALG_AS_INITFINAL | OP_ALG_AAI_DK);
set_jump_tgt_here(desc, uncond_jump_cmd);
} else
append_operation(desc, ctx->class1_alg_type |
OP_ALG_AS_INITFINAL | encrypt);
if (encrypt)
append_seq_in_ptr(desc, src_dma, req->assoclen + ivsize +
req->cryptlen - authsize, in_options);
else
append_seq_in_ptr(desc, src_dma, req->assoclen + ivsize +
req->cryptlen, in_options);
/* load payload & instruct to class2 to snoop class 1 if encrypting */
options = 0;
if (!edesc->src_nents) {
src_dma = sg_dma_address(req->src);
if (likely(req->src == req->dst)) {
if (all_contig) {
dst_dma = sg_dma_address(req->src);
} else {
sg_to_link_tbl(req->src, edesc->src_nents, edesc->link_tbl +
edesc->assoc_nents, 0);
src_dma = edesc->link_tbl_dma + edesc->assoc_nents *
sizeof(struct link_tbl_entry);
options |= LDST_SGF;
dst_dma = src_dma + sizeof(struct link_tbl_entry) *
((edesc->assoc_nents ? : 1) + 1);
out_options = LDST_SGF;
}
append_seq_in_ptr(desc, src_dma, req->cryptlen + authsize, options);
append_seq_fifo_load(desc, req->cryptlen, FIFOLD_CLASS_BOTH |
FIFOLD_TYPE_LASTBOTH |
(encrypt ? FIFOLD_TYPE_MSG1OUT2
: FIFOLD_TYPE_MSG));
/* specify destination */
if (req->src == req->dst) {
dst_dma = src_dma;
} else {
sg_count = dma_map_sg(jrdev, req->dst, edesc->dst_nents ? : 1,
DMA_FROM_DEVICE);
if (!edesc->dst_nents) {
dst_dma = sg_dma_address(req->dst);
options = 0;
} else {
sg_to_link_tbl(req->dst, edesc->dst_nents,
edesc->link_tbl + edesc->assoc_nents +
edesc->src_nents, 0);
dst_dma = edesc->link_tbl_dma + (edesc->assoc_nents +
edesc->src_nents) *
dst_dma = edesc->link_tbl_dma +
link_tbl_index *
sizeof(struct link_tbl_entry);
options = LDST_SGF;
out_options = LDST_SGF;
}
}
append_seq_out_ptr(desc, dst_dma, req->cryptlen + authsize, options);
append_seq_fifo_store(desc, req->cryptlen, FIFOST_TYPE_MESSAGE_DATA);
/* ICV */
if (encrypt)
append_seq_store(desc, authsize, LDST_CLASS_2_CCB |
LDST_SRCDST_BYTE_CONTEXT);
append_seq_out_ptr(desc, dst_dma, req->cryptlen, out_options);
else
append_seq_fifo_load(desc, authsize, FIFOLD_CLASS_CLASS2 |
FIFOLD_TYPE_LAST2 | FIFOLD_TYPE_ICV);
append_seq_out_ptr(desc, dst_dma, req->cryptlen - authsize,
out_options);
}
/*
* Fill in aead givencrypt job descriptor
*/
static void init_aead_giv_job(u32 *sh_desc, dma_addr_t ptr,
struct aead_edesc *edesc,
struct aead_request *req,
int contig)
{
struct crypto_aead *aead = crypto_aead_reqtfm(req);
struct caam_ctx *ctx = crypto_aead_ctx(aead);
int ivsize = crypto_aead_ivsize(aead);
int authsize = ctx->authsize;
u32 *desc = edesc->hw_desc;
u32 out_options = 0, in_options;
dma_addr_t dst_dma, src_dma;
int len, link_tbl_index = 0;
#ifdef DEBUG
debug("job_desc_len %d\n", desc_len(desc));
print_hex_dump(KERN_ERR, "jobdesc@"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc) , 1);
print_hex_dump(KERN_ERR, "jdlinkt@"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, edesc->link_tbl,
edesc->link_tbl_bytes, 1);
debug("assoclen %d cryptlen %d authsize %d\n",
req->assoclen, req->cryptlen, authsize);
print_hex_dump(KERN_ERR, "assoc @"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(req->assoc),
req->assoclen , 1);
print_hex_dump(KERN_ERR, "presciv@"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, req->iv, ivsize, 1);
print_hex_dump(KERN_ERR, "src @"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(req->src),
edesc->src_nents > 1 ? 100 : req->cryptlen, 1);
print_hex_dump(KERN_ERR, "shrdesc@"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, sh_desc,
desc_bytes(sh_desc), 1);
#endif
ret = caam_jr_enqueue(jrdev, desc, callback, req);
if (!ret)
ret = -EINPROGRESS;
else {
aead_unmap(jrdev, edesc, req);
kfree(edesc);
len = desc_len(sh_desc);
init_job_desc_shared(desc, ptr, len, HDR_SHARE_DEFER | HDR_REVERSE);
if (contig & GIV_SRC_CONTIG) {
src_dma = sg_dma_address(req->assoc);
in_options = 0;
} else {
src_dma = edesc->link_tbl_dma;
link_tbl_index += edesc->assoc_nents + 1 + edesc->src_nents;
in_options = LDST_SGF;
}
append_seq_in_ptr(desc, src_dma, req->assoclen + ivsize +
req->cryptlen - authsize, in_options);
return ret;
if (contig & GIV_DST_CONTIG) {
dst_dma = edesc->iv_dma;
} else {
if (likely(req->src == req->dst)) {
dst_dma = src_dma + sizeof(struct link_tbl_entry) *
edesc->assoc_nents;
out_options = LDST_SGF;
} else {
dst_dma = edesc->link_tbl_dma +
link_tbl_index *
sizeof(struct link_tbl_entry);
out_options = LDST_SGF;
}
}
append_seq_out_ptr(desc, dst_dma, ivsize + req->cryptlen, out_options);
}
/*
* derive number of elements in scatterlist
*/
static int sg_count(struct scatterlist *sg_list, int nbytes, int *chained)
static int sg_count(struct scatterlist *sg_list, int nbytes)
{
struct scatterlist *sg = sg_list;
int sg_nents = 0;
*chained = 0;
while (nbytes > 0) {
sg_nents++;
nbytes -= sg->length;
if (!sg_is_last(sg) && (sg + 1)->length == 0)
*chained = 1;
BUG(); /* Not support chaining */
sg = scatterwalk_sg_next(sg);
}
if (likely(sg_nents == 1))
return 0;
return sg_nents;
}
/*
* allocate and map the ipsec_esp extended descriptor
* allocate and map the aead extended descriptor
*/
static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
int desc_bytes)
int desc_bytes, bool *all_contig_ptr)
{
struct crypto_aead *aead = crypto_aead_reqtfm(req);
struct caam_ctx *ctx = crypto_aead_ctx(aead);
struct device *jrdev = ctx->jrdev;
gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL :
GFP_ATOMIC;
int assoc_nents, src_nents, dst_nents = 0, chained, link_tbl_bytes;
gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
int assoc_nents, src_nents, dst_nents = 0;
struct aead_edesc *edesc;
dma_addr_t iv_dma = 0;
int sgc;
bool all_contig = true;
int ivsize = crypto_aead_ivsize(aead);
int link_tbl_index, link_tbl_len = 0, link_tbl_bytes;
assoc_nents = sg_count(req->assoc, req->assoclen);
src_nents = sg_count(req->src, req->cryptlen);
if (unlikely(req->dst != req->src))
dst_nents = sg_count(req->dst, req->cryptlen);
sgc = dma_map_sg(jrdev, req->assoc, assoc_nents ? : 1,
DMA_BIDIRECTIONAL);
if (likely(req->src == req->dst)) {
sgc = dma_map_sg(jrdev, req->src, src_nents ? : 1,
DMA_BIDIRECTIONAL);
} else {
sgc = dma_map_sg(jrdev, req->src, src_nents ? : 1,
DMA_TO_DEVICE);
sgc = dma_map_sg(jrdev, req->dst, dst_nents ? : 1,
DMA_FROM_DEVICE);
}
assoc_nents = sg_count(req->assoc, req->assoclen, &chained);
BUG_ON(chained);
if (likely(assoc_nents == 1))
assoc_nents = 0;
src_nents = sg_count(req->src, req->cryptlen + ctx->authsize,
&chained);
BUG_ON(chained);
if (src_nents == 1)
src_nents = 0;
if (unlikely(req->dst != req->src)) {
dst_nents = sg_count(req->dst, req->cryptlen + ctx->authsize,
&chained);
BUG_ON(chained);
if (dst_nents == 1)
dst_nents = 0;
/* Check if data are contiguous */
iv_dma = dma_map_single(jrdev, req->iv, ivsize, DMA_TO_DEVICE);
if (assoc_nents || sg_dma_address(req->assoc) + req->assoclen !=
iv_dma || src_nents || iv_dma + ivsize !=
sg_dma_address(req->src)) {
all_contig = false;
assoc_nents = assoc_nents ? : 1;
src_nents = src_nents ? : 1;
link_tbl_len = assoc_nents + 1 + src_nents;
}
link_tbl_len += dst_nents;
link_tbl_bytes = (assoc_nents + src_nents + dst_nents) *
sizeof(struct link_tbl_entry);
debug("link_tbl_bytes %d\n", link_tbl_bytes);
link_tbl_bytes = link_tbl_len * sizeof(struct link_tbl_entry);
/* allocate space for base edesc and hw desc commands, link tables */
edesc = kmalloc(sizeof(struct aead_edesc) + desc_bytes +
......@@ -753,11 +1061,34 @@ static struct aead_edesc *aead_edesc_alloc(struct aead_request *req,
edesc->assoc_nents = assoc_nents;
edesc->src_nents = src_nents;
edesc->dst_nents = dst_nents;
edesc->iv_dma = iv_dma;
edesc->link_tbl_bytes = link_tbl_bytes;
edesc->link_tbl = (void *)edesc + sizeof(struct aead_edesc) +
desc_bytes;
edesc->link_tbl_dma = dma_map_single(jrdev, edesc->link_tbl,
link_tbl_bytes, DMA_TO_DEVICE);
edesc->link_tbl_bytes = link_tbl_bytes;
*all_contig_ptr = all_contig;
link_tbl_index = 0;
if (!all_contig) {
sg_to_link_tbl(req->assoc,
(assoc_nents ? : 1),
edesc->link_tbl +
link_tbl_index, 0);
link_tbl_index += assoc_nents ? : 1;
sg_to_link_tbl_one(edesc->link_tbl + link_tbl_index,
iv_dma, ivsize, 0);
link_tbl_index += 1;
sg_to_link_tbl_last(req->src,
(src_nents ? : 1),
edesc->link_tbl +
link_tbl_index, 0);
link_tbl_index += src_nents ? : 1;
}
if (dst_nents) {
sg_to_link_tbl_last(req->dst, dst_nents,
edesc->link_tbl + link_tbl_index, 0);
}
return edesc;
}
......@@ -768,62 +1099,185 @@ static int aead_encrypt(struct aead_request *req)
struct crypto_aead *aead = crypto_aead_reqtfm(req);
struct caam_ctx *ctx = crypto_aead_ctx(aead);
struct device *jrdev = ctx->jrdev;
int ivsize = crypto_aead_ivsize(aead);
bool all_contig;
u32 *desc;
dma_addr_t iv_dma;
int ret = 0;
req->cryptlen += ctx->authsize;
/* allocate extended descriptor */
edesc = aead_edesc_alloc(req, DESC_AEAD_ENCRYPT_TEXT_LEN *
CAAM_CMD_SZ);
edesc = aead_edesc_alloc(req, DESC_JOB_IO_LEN *
CAAM_CMD_SZ, &all_contig);
if (IS_ERR(edesc))
return PTR_ERR(edesc);
desc = edesc->hw_desc;
/* insert shared descriptor pointer */
init_job_desc_shared(desc, ctx->shared_desc_phys,
desc_len(ctx->sh_desc), HDR_SHARE_DEFER);
iv_dma = dma_map_single(jrdev, req->iv, ivsize, DMA_TO_DEVICE);
/* check dma error */
/* Create and submit job descriptor */
init_aead_job(ctx->sh_desc_enc, ctx->sh_desc_enc_dma, edesc, req,
all_contig, true);
#ifdef DEBUG
print_hex_dump(KERN_ERR, "aead jobdesc@"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, edesc->hw_desc,
desc_bytes(edesc->hw_desc), 1);
#endif
append_load(desc, iv_dma, ivsize,
LDST_CLASS_1_CCB | LDST_SRCDST_BYTE_CONTEXT);
desc = edesc->hw_desc;
ret = caam_jr_enqueue(jrdev, desc, aead_encrypt_done, req);
if (!ret) {
ret = -EINPROGRESS;
} else {
aead_unmap(jrdev, edesc, req);
kfree(edesc);
}
return init_aead_job(edesc, req, OP_ALG_ENCRYPT, aead_encrypt_done);
return ret;
}
static int aead_decrypt(struct aead_request *req)
{
struct aead_edesc *edesc;
struct crypto_aead *aead = crypto_aead_reqtfm(req);
int ivsize = crypto_aead_ivsize(aead);
struct caam_ctx *ctx = crypto_aead_ctx(aead);
struct device *jrdev = ctx->jrdev;
struct aead_edesc *edesc;
bool all_contig;
u32 *desc;
dma_addr_t iv_dma;
req->cryptlen -= ctx->authsize;
int ret = 0;
/* allocate extended descriptor */
edesc = aead_edesc_alloc(req, DESC_AEAD_DECRYPT_TEXT_LEN *
CAAM_CMD_SZ);
edesc = aead_edesc_alloc(req, DESC_JOB_IO_LEN *
CAAM_CMD_SZ, &all_contig);
if (IS_ERR(edesc))
return PTR_ERR(edesc);
#ifdef DEBUG
print_hex_dump(KERN_ERR, "dec src@"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(req->src),
req->cryptlen, 1);
#endif
/* Create and submit job descriptor*/
init_aead_job(ctx->sh_desc_dec,
ctx->sh_desc_dec_dma, edesc, req, all_contig, false);
#ifdef DEBUG
print_hex_dump(KERN_ERR, "aead jobdesc@"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, edesc->hw_desc,
desc_bytes(edesc->hw_desc), 1);
#endif
desc = edesc->hw_desc;
ret = caam_jr_enqueue(jrdev, desc, aead_decrypt_done, req);
if (!ret) {
ret = -EINPROGRESS;
} else {
aead_unmap(jrdev, edesc, req);
kfree(edesc);
}
/* insert shared descriptor pointer */
init_job_desc_shared(desc, ctx->shared_desc_phys,
desc_len(ctx->sh_desc), HDR_SHARE_DEFER);
return ret;
}
iv_dma = dma_map_single(jrdev, req->iv, ivsize, DMA_TO_DEVICE);
/* check dma error */
/*
* allocate and map the aead extended descriptor for aead givencrypt
*/
static struct aead_edesc *aead_giv_edesc_alloc(struct aead_givcrypt_request
*greq, int desc_bytes,
u32 *contig_ptr)
{
struct aead_request *req = &greq->areq;
struct crypto_aead *aead = crypto_aead_reqtfm(req);
struct caam_ctx *ctx = crypto_aead_ctx(aead);
struct device *jrdev = ctx->jrdev;
gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
int assoc_nents, src_nents, dst_nents = 0;
struct aead_edesc *edesc;
dma_addr_t iv_dma = 0;
int sgc;
u32 contig = GIV_SRC_CONTIG | GIV_DST_CONTIG;
int ivsize = crypto_aead_ivsize(aead);
int link_tbl_index, link_tbl_len = 0, link_tbl_bytes;
assoc_nents = sg_count(req->assoc, req->assoclen);
src_nents = sg_count(req->src, req->cryptlen);
if (unlikely(req->dst != req->src))
dst_nents = sg_count(req->dst, req->cryptlen);
sgc = dma_map_sg(jrdev, req->assoc, assoc_nents ? : 1,
DMA_BIDIRECTIONAL);
if (likely(req->src == req->dst)) {
sgc = dma_map_sg(jrdev, req->src, src_nents ? : 1,
DMA_BIDIRECTIONAL);
} else {
sgc = dma_map_sg(jrdev, req->src, src_nents ? : 1,
DMA_TO_DEVICE);
sgc = dma_map_sg(jrdev, req->dst, dst_nents ? : 1,
DMA_FROM_DEVICE);
}
/* Check if data are contiguous */
iv_dma = dma_map_single(jrdev, greq->giv, ivsize, DMA_TO_DEVICE);
if (assoc_nents || sg_dma_address(req->assoc) + req->assoclen !=
iv_dma || src_nents || iv_dma + ivsize != sg_dma_address(req->src))
contig &= ~GIV_SRC_CONTIG;
if (dst_nents || iv_dma + ivsize != sg_dma_address(req->dst))
contig &= ~GIV_DST_CONTIG;
if (unlikely(req->src != req->dst)) {
dst_nents = dst_nents ? : 1;
link_tbl_len += 1;
}
if (!(contig & GIV_SRC_CONTIG)) {
assoc_nents = assoc_nents ? : 1;
src_nents = src_nents ? : 1;
link_tbl_len += assoc_nents + 1 + src_nents;
if (likely(req->src == req->dst))
contig &= ~GIV_DST_CONTIG;
}
link_tbl_len += dst_nents;
append_load(desc, iv_dma, ivsize,
LDST_CLASS_1_CCB | LDST_SRCDST_BYTE_CONTEXT);
link_tbl_bytes = link_tbl_len * sizeof(struct link_tbl_entry);
/* allocate space for base edesc and hw desc commands, link tables */
edesc = kmalloc(sizeof(struct aead_edesc) + desc_bytes +
link_tbl_bytes, GFP_DMA | flags);
if (!edesc) {
dev_err(jrdev, "could not allocate extended descriptor\n");
return ERR_PTR(-ENOMEM);
}
return init_aead_job(edesc, req, !OP_ALG_ENCRYPT, aead_decrypt_done);
edesc->assoc_nents = assoc_nents;
edesc->src_nents = src_nents;
edesc->dst_nents = dst_nents;
edesc->iv_dma = iv_dma;
edesc->link_tbl_bytes = link_tbl_bytes;
edesc->link_tbl = (void *)edesc + sizeof(struct aead_edesc) +
desc_bytes;
edesc->link_tbl_dma = dma_map_single(jrdev, edesc->link_tbl,
link_tbl_bytes, DMA_TO_DEVICE);
*contig_ptr = contig;
link_tbl_index = 0;
if (!(contig & GIV_SRC_CONTIG)) {
sg_to_link_tbl(req->assoc, assoc_nents,
edesc->link_tbl +
link_tbl_index, 0);
link_tbl_index += assoc_nents;
sg_to_link_tbl_one(edesc->link_tbl + link_tbl_index,
iv_dma, ivsize, 0);
link_tbl_index += 1;
sg_to_link_tbl_last(req->src, src_nents,
edesc->link_tbl +
link_tbl_index, 0);
link_tbl_index += src_nents;
}
if (unlikely(req->src != req->dst && !(contig & GIV_DST_CONTIG))) {
sg_to_link_tbl_one(edesc->link_tbl + link_tbl_index,
iv_dma, ivsize, 0);
link_tbl_index += 1;
sg_to_link_tbl_last(req->dst, dst_nents,
edesc->link_tbl + link_tbl_index, 0);
}
return edesc;
}
static int aead_givencrypt(struct aead_givcrypt_request *areq)
......@@ -833,55 +1287,44 @@ static int aead_givencrypt(struct aead_givcrypt_request *areq)
struct crypto_aead *aead = crypto_aead_reqtfm(req);
struct caam_ctx *ctx = crypto_aead_ctx(aead);
struct device *jrdev = ctx->jrdev;
int ivsize = crypto_aead_ivsize(aead);
dma_addr_t iv_dma;
u32 contig;
u32 *desc;
int ret = 0;
iv_dma = dma_map_single(jrdev, areq->giv, ivsize, DMA_FROM_DEVICE);
debug("%s: giv %p\n", __func__, areq->giv);
req->cryptlen += ctx->authsize;
/* allocate extended descriptor */
edesc = aead_edesc_alloc(req, DESC_AEAD_GIVENCRYPT_TEXT_LEN *
CAAM_CMD_SZ);
edesc = aead_giv_edesc_alloc(areq, DESC_JOB_IO_LEN *
CAAM_CMD_SZ, &contig);
if (IS_ERR(edesc))
return PTR_ERR(edesc);
desc = edesc->hw_desc;
/* insert shared descriptor pointer */
init_job_desc_shared(desc, ctx->shared_desc_phys,
desc_len(ctx->sh_desc), HDR_SHARE_DEFER);
/*
* LOAD IMM Info FIFO
* to DECO, Last, Padding, Random, Message, 16 bytes
*/
append_load_imm_u32(desc, NFIFOENTRY_DEST_DECO | NFIFOENTRY_LC1 |
NFIFOENTRY_STYPE_PAD | NFIFOENTRY_DTYPE_MSG |
NFIFOENTRY_PTYPE_RND | ivsize,
LDST_SRCDST_WORD_INFO_FIFO);
/*
* disable info fifo entries since the above serves as the entry
* this way, the MOVE command won't generate an entry.
* Note that this isn't required in more recent versions of
* SEC as a MOVE that doesn't do info FIFO entries is available.
*/
append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
/* MOVE DECO Alignment -> C1 Context 16 bytes */
append_move(desc, MOVE_SRC_INFIFO | MOVE_DEST_CLASS1CTX | ivsize);
/* re-enable info fifo entries */
append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO);
#ifdef DEBUG
print_hex_dump(KERN_ERR, "giv src@"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, sg_virt(req->src),
req->cryptlen, 1);
#endif
/* MOVE C1 Context -> OFIFO 16 bytes */
append_move(desc, MOVE_SRC_CLASS1CTX | MOVE_DEST_OUTFIFO | ivsize);
/* Create and submit job descriptor*/
init_aead_giv_job(ctx->sh_desc_givenc,
ctx->sh_desc_givenc_dma, edesc, req, contig);
#ifdef DEBUG
print_hex_dump(KERN_ERR, "aead jobdesc@"xstr(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, edesc->hw_desc,
desc_bytes(edesc->hw_desc), 1);
#endif
append_fifo_store(desc, iv_dma, ivsize, FIFOST_TYPE_MESSAGE_DATA);
desc = edesc->hw_desc;
ret = caam_jr_enqueue(jrdev, desc, aead_encrypt_done, req);
if (!ret) {
ret = -EINPROGRESS;
} else {
aead_unmap(jrdev, edesc, req);
kfree(edesc);
}
return init_aead_job(edesc, req, OP_ALG_ENCRYPT, aead_encrypt_done);
return ret;
}
#define template_aead template_u.aead
......@@ -1120,16 +1563,19 @@ static void caam_cra_exit(struct crypto_tfm *tfm)
{
struct caam_ctx *ctx = crypto_tfm_ctx(tfm);
if (!dma_mapping_error(ctx->jrdev, ctx->shared_desc_phys))
dma_unmap_single(ctx->jrdev, ctx->shared_desc_phys,
desc_bytes(ctx->sh_desc), DMA_TO_DEVICE);
kfree(ctx->sh_desc);
if (!dma_mapping_error(ctx->jrdev, ctx->key_dma))
dma_unmap_single(ctx->jrdev, ctx->key_dma,
ctx->split_key_pad_len + ctx->enckeylen,
if (ctx->sh_desc_enc_dma &&
!dma_mapping_error(ctx->jrdev, ctx->sh_desc_enc_dma))
dma_unmap_single(ctx->jrdev, ctx->sh_desc_enc_dma,
desc_bytes(ctx->sh_desc_enc), DMA_TO_DEVICE);
if (ctx->sh_desc_dec_dma &&
!dma_mapping_error(ctx->jrdev, ctx->sh_desc_dec_dma))
dma_unmap_single(ctx->jrdev, ctx->sh_desc_dec_dma,
desc_bytes(ctx->sh_desc_dec), DMA_TO_DEVICE);
if (ctx->sh_desc_givenc_dma &&
!dma_mapping_error(ctx->jrdev, ctx->sh_desc_givenc_dma))
dma_unmap_single(ctx->jrdev, ctx->sh_desc_givenc_dma,
desc_bytes(ctx->sh_desc_givenc),
DMA_TO_DEVICE);
kfree(ctx->key);
}
static void __exit caam_algapi_exit(void)
......
drivers/crypto/caam/desc_constr.h
View file @ 1acebad3
......@@ -9,7 +9,7 @@
#define IMMEDIATE (1 << 23)
#define CAAM_CMD_SZ sizeof(u32)
#define CAAM_PTR_SZ sizeof(dma_addr_t)
#define CAAM_DESC_BYTES_MAX (CAAM_CMD_SZ * 64)
#define CAAM_DESC_BYTES_MAX (CAAM_CMD_SZ * MAX_CAAM_DESCSIZE)
#ifdef DEBUG
#define PRINT_POS do { printk(KERN_DEBUG "%02d: %s\n", desc_len(desc),\
......@@ -18,6 +18,9 @@
#define PRINT_POS
#endif
#define SET_OK_PROP_ERRORS (IMMEDIATE | LDST_CLASS_DECO | \
LDST_SRCDST_WORD_DECOCTRL | \
(LDOFF_CHG_SHARE_OK_PROP << LDST_OFFSET_SHIFT))
#define DISABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \
LDST_SRCDST_WORD_DECOCTRL | \
(LDOFF_DISABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))
......@@ -203,3 +206,56 @@ static inline void append_##cmd##_imm_##type(u32 *desc, type immediate, \
append_cmd(desc, immediate); \
}
APPEND_CMD_RAW_IMM(load, LOAD, u32);
/*
* Append math command. Only the last part of destination and source need to
* be specified
*/
#define APPEND_MATH(op, desc, dest, src_0, src_1, len) \
append_cmd(desc, CMD_MATH | MATH_FUN_##op | MATH_DEST_##dest | \
MATH_SRC0_##src_0 | MATH_SRC1_##src_1 | (u32) (len & MATH_LEN_MASK));
#define append_math_add(desc, dest, src0, src1, len) \
APPEND_MATH(ADD, desc, dest, src0, src1, len)
#define append_math_sub(desc, dest, src0, src1, len) \
APPEND_MATH(SUB, desc, dest, src0, src1, len)
#define append_math_add_c(desc, dest, src0, src1, len) \
APPEND_MATH(ADDC, desc, dest, src0, src1, len)
#define append_math_sub_b(desc, dest, src0, src1, len) \
APPEND_MATH(SUBB, desc, dest, src0, src1, len)
#define append_math_and(desc, dest, src0, src1, len) \
APPEND_MATH(AND, desc, dest, src0, src1, len)
#define append_math_or(desc, dest, src0, src1, len) \
APPEND_MATH(OR, desc, dest, src0, src1, len)
#define append_math_xor(desc, dest, src0, src1, len) \
APPEND_MATH(XOR, desc, dest, src0, src1, len)
#define append_math_lshift(desc, dest, src0, src1, len) \
APPEND_MATH(LSHIFT, desc, dest, src0, src1, len)
#define append_math_rshift(desc, dest, src0, src1, len) \
APPEND_MATH(RSHIFT, desc, dest, src0, src1, len)
/* Exactly one source is IMM. Data is passed in as u32 value */
#define APPEND_MATH_IMM_u32(op, desc, dest, src_0, src_1, data) \
do { \
APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ); \
append_cmd(desc, data); \
} while (0);
#define append_math_add_imm_u32(desc, dest, src0, src1, data) \
APPEND_MATH_IMM_u32(ADD, desc, dest, src0, src1, data)
#define append_math_sub_imm_u32(desc, dest, src0, src1, data) \
APPEND_MATH_IMM_u32(SUB, desc, dest, src0, src1, data)
#define append_math_add_c_imm_u32(desc, dest, src0, src1, data) \
APPEND_MATH_IMM_u32(ADDC, desc, dest, src0, src1, data)
#define append_math_sub_b_imm_u32(desc, dest, src0, src1, data) \
APPEND_MATH_IMM_u32(SUBB, desc, dest, src0, src1, data)
#define append_math_and_imm_u32(desc, dest, src0, src1, data) \
APPEND_MATH_IMM_u32(AND, desc, dest, src0, src1, data)
#define append_math_or_imm_u32(desc, dest, src0, src1, data) \
APPEND_MATH_IMM_u32(OR, desc, dest, src0, src1, data)
#define append_math_xor_imm_u32(desc, dest, src0, src1, data) \
APPEND_MATH_IMM_u32(XOR, desc, dest, src0, src1, data)
#define append_math_lshift_imm_u32(desc, dest, src0, src1, data) \
APPEND_MATH_IMM_u32(LSHIFT, desc, dest, src0, src1, data)
#define append_math_rshift_imm_u32(desc, dest, src0, src1, data) \
APPEND_MATH_IMM_u32(RSHIFT, desc, dest, src0, src1, data)
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