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csrypto: ccp - Expand RSA support for a v5 ccp

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A version 5 CCP can handle an RSA modulus up to 16k bits.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Gary R Hook 2017-07-17 15:16:42 -05:00 committed by Herbert Xu
parent ceeec0afd6
commit e28c190db6
7 changed files with 12 additions and 2 deletions
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5
drivers/crypto/ccp/ccp-crypto-rsa.c
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@ -60,7 +60,10 @@ static int ccp_rsa_complete(struct crypto_async_request *async_req, int ret)
static unsigned int ccp_rsa_maxsize(struct crypto_akcipher *tfm)
{
return CCP_RSA_MAXMOD;
if (ccp_version() > CCP_VERSION(3, 0))
return CCP5_RSA_MAXMOD;
else
return CCP_RSA_MAXMOD;
}
static int ccp_rsa_crypt(struct akcipher_request *req, bool encrypt)

1
drivers/crypto/ccp/ccp-crypto.h
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@ -255,6 +255,7 @@ struct ccp_rsa_req_ctx {
};
#define CCP_RSA_MAXMOD (4 * 1024 / 8)
#define CCP5_RSA_MAXMOD (16 * 1024 / 8)
/***** Common Context Structure *****/
struct ccp_ctx {

1
drivers/crypto/ccp/ccp-dev-v3.c
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@ -597,4 +597,5 @@ const struct ccp_vdata ccpv3 = {
.setup = NULL,
.perform = &ccp3_actions,
.offset = 0x20000,
.rsamax = CCP_RSA_MAX_WIDTH,
};

2
drivers/crypto/ccp/ccp-dev-v5.c
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@ -1112,6 +1112,7 @@ const struct ccp_vdata ccpv5a = {
.setup = ccp5_config,
.perform = &ccp5_actions,
.offset = 0x0,
.rsamax = CCP5_RSA_MAX_WIDTH,
};
const struct ccp_vdata ccpv5b = {
@ -1120,4 +1121,5 @@ const struct ccp_vdata ccpv5b = {
.setup = ccp5other_config,
.perform = &ccp5_actions,
.offset = 0x0,
.rsamax = CCP5_RSA_MAX_WIDTH,
};

1
drivers/crypto/ccp/ccp-dev.h
View File

@ -202,6 +202,7 @@
#define CCP_SHA_SB_COUNT 1
#define CCP_RSA_MAX_WIDTH 4096
#define CCP5_RSA_MAX_WIDTH 16384
#define CCP_PASSTHRU_BLOCKSIZE 256
#define CCP_PASSTHRU_MASKSIZE 32

3
drivers/crypto/ccp/ccp-ops.c
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@ -1736,7 +1736,8 @@ static int ccp_run_rsa_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
unsigned int sb_count, i_len, o_len;
int ret;
if (rsa->key_size > CCP_RSA_MAX_WIDTH)
/* Check against the maximum allowable size, in bits */
if (rsa->key_size > cmd_q->ccp->vdata->rsamax)
return -EINVAL;
if (!rsa->exp || !rsa->mod || !rsa->src || !rsa->dst)

1
drivers/crypto/ccp/sp-dev.h
View File

@ -40,6 +40,7 @@ struct ccp_vdata {
void (*setup)(struct ccp_device *);
const struct ccp_actions *perform;
const unsigned int offset;
const unsigned int rsamax;
};
/* Structure to hold SP device data */
struct sp_dev_vdata {