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[PATCH 04/13] mv_cesa: split up processing callbacks | |
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Have a dedicated function initialising the full SRAM config, then use a
minimal callback for changing only relevant parts of it.
Signed-off-by: Phil Sutter <phil.sutter@xxxxxxxxxxxx>
---
drivers/crypto/mv_cesa.c | 87 +++++++++++++++++++++++++++++++++------------
1 files changed, 64 insertions(+), 23 deletions(-)
diff --git a/drivers/crypto/mv_cesa.c b/drivers/crypto/mv_cesa.c
index 68b83d8..4a989ea 100644
--- a/drivers/crypto/mv_cesa.c
+++ b/drivers/crypto/mv_cesa.c
@@ -62,7 +62,7 @@ struct req_progress {
struct scatterlist *src_sg;
struct scatterlist *dst_sg;
void (*complete) (void);
- void (*process) (int is_first);
+ void (*process) (void);
/* src mostly */
int sg_src_left;
@@ -265,9 +265,8 @@ static void setup_data_in(void)
p->crypt_len = data_in_sram;
}
-static void mv_process_current_q(int first_block)
+static void mv_init_crypt_config(struct ablkcipher_request *req)
{
- struct ablkcipher_request *req = ablkcipher_request_cast(cpg->cur_req);
struct mv_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
struct mv_req_ctx *req_ctx = ablkcipher_request_ctx(req);
struct sec_accel_config *op = &cpg->sa_sram.op;
@@ -281,8 +280,6 @@ static void mv_process_current_q(int first_block)
op->config = CFG_OP_CRYPT_ONLY | CFG_ENCM_AES | CFG_ENC_MODE_CBC;
op->enc_iv = ENC_IV_POINT(SRAM_DATA_IV) |
ENC_IV_BUF_POINT(SRAM_DATA_IV_BUF);
- if (!first_block)
- memcpy(req->info, cpg->sram + SRAM_DATA_IV_BUF, 16);
memcpy(cpg->sa_sram.sa_iv, req->info, 16);
break;
}
@@ -308,9 +305,8 @@ static void mv_process_current_q(int first_block)
op->enc_p = ENC_P_SRC(SRAM_DATA_IN_START) |
ENC_P_DST(SRAM_DATA_OUT_START);
op->enc_key_p = SRAM_DATA_KEY_P;
-
- setup_data_in();
op->enc_len = cpg->p.crypt_len;
+
memcpy(cpg->sram + SRAM_CONFIG, &cpg->sa_sram,
sizeof(struct sec_accel_sram));
@@ -319,6 +315,17 @@ static void mv_process_current_q(int first_block)
writel(SEC_CMD_EN_SEC_ACCL0, cpg->reg + SEC_ACCEL_CMD);
}
+static void mv_update_crypt_config(void)
+{
+ /* update the enc_len field only */
+ memcpy(cpg->sram + SRAM_CONFIG + 2 * sizeof(u32),
+ &cpg->p.crypt_len, sizeof(u32));
+
+ /* GO */
+ mv_setup_timer();
+ writel(SEC_CMD_EN_SEC_ACCL0, cpg->reg + SEC_ACCEL_CMD);
+}
+
static void mv_crypto_algo_completion(void)
{
struct ablkcipher_request *req = ablkcipher_request_cast(cpg->cur_req);
@@ -330,9 +337,8 @@ static void mv_crypto_algo_completion(void)
memcpy(req->info, cpg->sram + SRAM_DATA_IV_BUF, 16);
}
-static void mv_process_hash_current(int first_block)
+static void mv_init_hash_config(struct ahash_request *req)
{
- struct ahash_request *req = ahash_request_cast(cpg->cur_req);
const struct mv_tfm_hash_ctx *tfm_ctx = crypto_tfm_ctx(req->base.tfm);
struct mv_req_hash_ctx *req_ctx = ahash_request_ctx(req);
struct req_progress *p = &cpg->p;
@@ -355,8 +361,6 @@ static void mv_process_hash_current(int first_block)
MAC_SRC_DATA_P(SRAM_DATA_IN_START) |
MAC_SRC_TOTAL_LEN((u32)req_ctx->count);
- setup_data_in();
-
op->mac_digest =
MAC_DIGEST_P(SRAM_DIGEST_BUF) | MAC_FRAG_LEN(p->crypt_len);
op->mac_iv =
@@ -379,13 +383,11 @@ static void mv_process_hash_current(int first_block)
else
op->config |= CFG_MID_FRAG;
- if (first_block) {
- writel(req_ctx->state[0], cpg->reg + DIGEST_INITIAL_VAL_A);
- writel(req_ctx->state[1], cpg->reg + DIGEST_INITIAL_VAL_B);
- writel(req_ctx->state[2], cpg->reg + DIGEST_INITIAL_VAL_C);
- writel(req_ctx->state[3], cpg->reg + DIGEST_INITIAL_VAL_D);
- writel(req_ctx->state[4], cpg->reg + DIGEST_INITIAL_VAL_E);
- }
+ writel(req_ctx->state[0], cpg->reg + DIGEST_INITIAL_VAL_A);
+ writel(req_ctx->state[1], cpg->reg + DIGEST_INITIAL_VAL_B);
+ writel(req_ctx->state[2], cpg->reg + DIGEST_INITIAL_VAL_C);
+ writel(req_ctx->state[3], cpg->reg + DIGEST_INITIAL_VAL_D);
+ writel(req_ctx->state[4], cpg->reg + DIGEST_INITIAL_VAL_E);
}
memcpy(cpg->sram + SRAM_CONFIG, &cpg->sa_sram,
@@ -396,6 +398,42 @@ static void mv_process_hash_current(int first_block)
writel(SEC_CMD_EN_SEC_ACCL0, cpg->reg + SEC_ACCEL_CMD);
}
+static void mv_update_hash_config(void)
+{
+ struct ahash_request *req = ahash_request_cast(cpg->cur_req);
+ struct mv_req_hash_ctx *req_ctx = ahash_request_ctx(req);
+ struct req_progress *p = &cpg->p;
+ struct sec_accel_config *op = &cpg->sa_sram.op;
+ int is_last;
+
+ /* update only the config (for changed fragment state) and
+ * mac_digest (for changed frag len) fields */
+
+ switch (req_ctx->op) {
+ case COP_SHA1:
+ default:
+ op->config = CFG_OP_MAC_ONLY | CFG_MACM_SHA1;
+ break;
+ case COP_HMAC_SHA1:
+ op->config = CFG_OP_MAC_ONLY | CFG_MACM_HMAC_SHA1;
+ break;
+ }
+
+ is_last = req_ctx->last_chunk
+ && (p->hw_processed_bytes + p->crypt_len >= p->hw_nbytes)
+ && (req_ctx->count <= MAX_HW_HASH_SIZE);
+
+ op->config |= is_last ? CFG_LAST_FRAG : CFG_MID_FRAG;
+ memcpy(cpg->sram + SRAM_CONFIG, &op->config, sizeof(u32));
+
+ op->mac_digest = MAC_DIGEST_P(SRAM_DIGEST_BUF) | MAC_FRAG_LEN(p->crypt_len);
+ memcpy(cpg->sram + SRAM_CONFIG + 6 * sizeof(u32), &op->mac_digest, sizeof(u32));
+
+ /* GO */
+ mv_setup_timer();
+ writel(SEC_CMD_EN_SEC_ACCL0, cpg->reg + SEC_ACCEL_CMD);
+}
+
static inline int mv_hash_import_sha1_ctx(const struct mv_req_hash_ctx *ctx,
struct shash_desc *desc)
{
@@ -507,7 +545,8 @@ static void dequeue_complete_req(void)
if (cpg->p.hw_processed_bytes < cpg->p.hw_nbytes) {
/* process next scatter list entry */
cpg->eng_st = ENGINE_BUSY;
- cpg->p.process(0);
+ setup_data_in();
+ cpg->p.process();
} else {
cpg->p.complete();
cpg->eng_st = ENGINE_IDLE;
@@ -542,7 +581,7 @@ static void mv_start_new_crypt_req(struct ablkcipher_request *req)
memset(p, 0, sizeof(struct req_progress));
p->hw_nbytes = req->nbytes;
p->complete = mv_crypto_algo_completion;
- p->process = mv_process_current_q;
+ p->process = mv_update_crypt_config;
p->copy_back = 1;
p->src_sg = req->src;
@@ -554,7 +593,8 @@ static void mv_start_new_crypt_req(struct ablkcipher_request *req)
p->sg_dst_left = req->dst->length;
}
- mv_process_current_q(1);
+ setup_data_in();
+ mv_init_crypt_config(req);
}
static void mv_start_new_hash_req(struct ahash_request *req)
@@ -583,7 +623,7 @@ static void mv_start_new_hash_req(struct ahash_request *req)
if (hw_bytes) {
p->hw_nbytes = hw_bytes;
p->complete = mv_hash_algo_completion;
- p->process = mv_process_hash_current;
+ p->process = mv_update_hash_config;
if (unlikely(old_extra_bytes)) {
memcpy(cpg->sram + SRAM_DATA_IN_START, ctx->buffer,
@@ -591,7 +631,8 @@ static void mv_start_new_hash_req(struct ahash_request *req)
p->crypt_len = old_extra_bytes;
}
- mv_process_hash_current(1);
+ setup_data_in();
+ mv_init_hash_config(req);
} else {
copy_src_to_buf(p, ctx->buffer + old_extra_bytes,
ctx->extra_bytes - old_extra_bytes);
--
1.7.3.4
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