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crypto: msm: Add support for using PIPE keys 

Based on the encryption key value, check if the request
requires using the PIPE keys. If so, set appropriate
configuration registers to indicate to HW to use PIPE keys.

Change-Id: I8ddf6c7b372dc63479e1bd105bbcb8c127ff1513
Signed-off-by: Mona Hossain <mhossain@codeaurora.org>
This commit is contained in:
Mona Hossain 2013-03-07 13:50:04 -08:00 committed by Stephen Boyd
parent d8cfd9bbd8
commit 9fea93c8bd
1 changed files with 21 additions and 4 deletions
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25
drivers/crypto/msm/qce50.c
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@ -41,6 +41,7 @@
#define CRYPTO_CONFIG_RESET 0xE001F
#define QCE_MAX_NUM_DSCR 0x400
#define QCE_SIZE_BAM_DSCR 0x08
#define QCE_SECTOR_SIZE 0x200
static DEFINE_MUTEX(bam_register_cnt);
struct bam_registration_info {
@ -445,6 +446,7 @@ static int _ce_setup_cipher(struct qce_device *pce_dev, struct qce_req *creq,
uint32_t enck_size_in_word = 0;
uint32_t key_size;
bool use_hw_key = false;
bool use_pipe_key = false;
uint32_t encr_cfg = 0;
uint32_t ivsize = creq->ivsize;
int i;
@ -456,6 +458,7 @@ static int _ce_setup_cipher(struct qce_device *pce_dev, struct qce_req *creq,
key_size = creq->encklen;
_byte_stream_to_net_words(enckey32, creq->enckey, key_size);
pce = cmdlistinfo->go_proc;
/* check for null key. If null, use hw key*/
enck_size_in_word = key_size/sizeof(uint32_t);
@ -463,15 +466,22 @@ static int _ce_setup_cipher(struct qce_device *pce_dev, struct qce_req *creq,
if (enckey32[i] != 0)
break;
}
pce = cmdlistinfo->go_proc;
if (i == enck_size_in_word) {
use_hw_key = true;
pce->addr = (uint32_t)(CRYPTO_GOPROC_QC_KEY_REG +
pce_dev->phy_iobase);
} else {
}
if (use_hw_key == false) {
for (i = 0; i < enck_size_in_word; i++) {
if (enckey32[i] != 0xFFFFFFFF)
break;
}
if (i == enck_size_in_word)
use_pipe_key = true;
}
if (use_hw_key == false)
pce->addr = (uint32_t)(CRYPTO_GOPROC_REG +
pce_dev->phy_iobase);
}
if ((creq->op == QCE_REQ_AEAD) && (creq->mode == QCE_MODE_CCM)) {
uint32_t authklen32 = creq->encklen/sizeof(uint32_t);
@ -600,7 +610,10 @@ static int _ce_setup_cipher(struct qce_device *pce_dev, struct qce_req *creq,
/* write xts du size */
pce = cmdlistinfo->encr_xts_du_size;
pce->data = creq->cryptlen;
if (use_pipe_key == true)
pce->data = QCE_SECTOR_SIZE;
else
pce->data = creq->cryptlen;
}
if (creq->mode != QCE_MODE_ECB) {
if (creq->mode == QCE_MODE_XTS)
@ -653,6 +666,10 @@ static int _ce_setup_cipher(struct qce_device *pce_dev, struct qce_req *creq,
break;
} /* end of switch (creq->mode) */
if (use_pipe_key)
encr_cfg |= (CRYPTO_USE_PIPE_KEY_ENCR_ENABLED
<< CRYPTO_USE_PIPE_KEY_ENCR);
/* write encr seg cfg */
pce = cmdlistinfo->encr_seg_cfg;
if ((creq->alg == CIPHER_ALG_DES) || (creq->alg == CIPHER_ALG_3DES)) {