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crypto: crypto4xx - simplify sa and state context acquisition 

Thanks to the big overhaul of crypto4xx_build_pd(), the request-local
sa_in, sa_out and state_record allocation can be simplified.

There's no need to setup any dma coherent memory anymore and
much of the support code can be removed.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Christian Lamparter 2017-10-04 01:00:14 +02:00 committed by Herbert Xu
parent 4b5b79998a
commit 2f77690dcb
3 changed files with 15 additions and 68 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/crypto/amcc/crypto4xx_alg.c
View File

@ -122,20 +122,13 @@ static int crypto4xx_setkey_aes(struct crypto_ablkcipher *cipher,
}
/* Create SA */
if (ctx->sa_in_dma_addr || ctx->sa_out_dma_addr)
if (ctx->sa_in || ctx->sa_out)
crypto4xx_free_sa(ctx);
rc = crypto4xx_alloc_sa(ctx, SA_AES128_LEN + (keylen-16) / 4);
if (rc)
return rc;
if (ctx->state_record_dma_addr == 0) {
rc = crypto4xx_alloc_state_record(ctx);
if (rc) {
crypto4xx_free_sa(ctx);
return rc;
}
}
/* Setup SA */
sa = ctx->sa_in;
@ -203,8 +196,8 @@ int crypto4xx_setkey_rfc3686(struct crypto_ablkcipher *cipher,
if (rc)
return rc;
crypto4xx_memcpy_to_le32(ctx->state_record->save_iv,
key + keylen - CTR_RFC3686_NONCE_SIZE, CTR_RFC3686_NONCE_SIZE);
ctx->iv_nonce = cpu_to_le32p((u32 *)&key[keylen -
CTR_RFC3686_NONCE_SIZE]);
return 0;
}
@ -213,7 +206,7 @@ int crypto4xx_rfc3686_encrypt(struct ablkcipher_request *req)
{
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
__le32 iv[AES_IV_SIZE / 4] = {
ctx->state_record->save_iv[0],
ctx->iv_nonce,
cpu_to_le32p((u32 *) req->info),
cpu_to_le32p((u32 *) (req->info + 4)),
cpu_to_le32(1) };
@ -227,7 +220,7 @@ int crypto4xx_rfc3686_decrypt(struct ablkcipher_request *req)
{
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
__le32 iv[AES_IV_SIZE / 4] = {
ctx->state_record->save_iv[0],
ctx->iv_nonce,
cpu_to_le32p((u32 *) req->info),
cpu_to_le32p((u32 *) (req->info + 4)),
cpu_to_le32(1) };
@ -254,21 +247,13 @@ static int crypto4xx_hash_alg_init(struct crypto_tfm *tfm,
ctx->dev = my_alg->dev;
/* Create SA */
if (ctx->sa_in_dma_addr || ctx->sa_out_dma_addr)
if (ctx->sa_in || ctx->sa_out)
crypto4xx_free_sa(ctx);
rc = crypto4xx_alloc_sa(ctx, sa_len);
if (rc)
return rc;
if (ctx->state_record_dma_addr == 0) {
crypto4xx_alloc_state_record(ctx);
if (!ctx->state_record_dma_addr) {
crypto4xx_free_sa(ctx);
return -ENOMEM;
}
}
crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
sizeof(struct crypto4xx_ctx));
sa = (struct dynamic_sa_hash160 *)ctx->sa_in;

50
drivers/crypto/amcc/crypto4xx_core.c
View File

@ -130,21 +130,17 @@ static void crypto4xx_hw_init(struct crypto4xx_device *dev)
int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size)
{
ctx->sa_in = dma_alloc_coherent(ctx->dev->core_dev->device, size * 4,
&ctx->sa_in_dma_addr, GFP_ATOMIC);
ctx->sa_in = kzalloc(size * 4, GFP_ATOMIC);
if (ctx->sa_in == NULL)
return -ENOMEM;
ctx->sa_out = dma_alloc_coherent(ctx->dev->core_dev->device, size * 4,
&ctx->sa_out_dma_addr, GFP_ATOMIC);
ctx->sa_out = kzalloc(size * 4, GFP_ATOMIC);
if (ctx->sa_out == NULL) {
dma_free_coherent(ctx->dev->core_dev->device, size * 4,
ctx->sa_in, ctx->sa_in_dma_addr);
kfree(ctx->sa_in);
ctx->sa_in = NULL;
return -ENOMEM;
}
memset(ctx->sa_in, 0, size * 4);
memset(ctx->sa_out, 0, size * 4);
ctx->sa_len = size;
return 0;
@ -152,40 +148,13 @@ int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size)
void crypto4xx_free_sa(struct crypto4xx_ctx *ctx)
{
if (ctx->sa_in != NULL)
dma_free_coherent(ctx->dev->core_dev->device, ctx->sa_len * 4,
ctx->sa_in, ctx->sa_in_dma_addr);
if (ctx->sa_out != NULL)
dma_free_coherent(ctx->dev->core_dev->device, ctx->sa_len * 4,
ctx->sa_out, ctx->sa_out_dma_addr);
ctx->sa_in_dma_addr = 0;
ctx->sa_out_dma_addr = 0;
kfree(ctx->sa_in);
ctx->sa_in = NULL;
kfree(ctx->sa_out);
ctx->sa_out = NULL;
ctx->sa_len = 0;
}
u32 crypto4xx_alloc_state_record(struct crypto4xx_ctx *ctx)
{
ctx->state_record = dma_alloc_coherent(ctx->dev->core_dev->device,
sizeof(struct sa_state_record),
&ctx->state_record_dma_addr, GFP_ATOMIC);
if (!ctx->state_record_dma_addr)
return -ENOMEM;
memset(ctx->state_record, 0, sizeof(struct sa_state_record));
return 0;
}
static void crypto4xx_free_state_record(struct crypto4xx_ctx *ctx)
{
if (ctx->state_record != NULL)
dma_free_coherent(ctx->dev->core_dev->device,
sizeof(struct sa_state_record),
ctx->state_record,
ctx->state_record_dma_addr);
ctx->state_record_dma_addr = 0;
}
/**
* alloc memory for the gather ring
* no need to alloc buf for the ring
@ -883,8 +852,6 @@ static int crypto4xx_alg_init(struct crypto_tfm *tfm)
ctx->dev = amcc_alg->dev;
ctx->sa_in = NULL;
ctx->sa_out = NULL;
ctx->sa_in_dma_addr = 0;
ctx->sa_out_dma_addr = 0;
ctx->sa_len = 0;
switch (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) {
@ -905,7 +872,6 @@ static void crypto4xx_alg_exit(struct crypto_tfm *tfm)
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
crypto4xx_free_sa(ctx);
crypto4xx_free_state_record(ctx);
}
int crypto4xx_register_alg(struct crypto4xx_device *sec_dev,

6
drivers/crypto/amcc/crypto4xx_core.h
View File

@ -122,11 +122,8 @@ struct crypto4xx_core_device {
struct crypto4xx_ctx {
struct crypto4xx_device *dev;
struct dynamic_sa_ctl *sa_in;
dma_addr_t sa_in_dma_addr;
struct dynamic_sa_ctl *sa_out;
dma_addr_t sa_out_dma_addr;
struct sa_state_record *state_record;
dma_addr_t state_record_dma_addr;
__le32 iv_nonce;
u32 sa_len;
};
@ -159,7 +156,6 @@ static inline struct crypto4xx_alg *crypto_alg_to_crypto4xx_alg(
int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size);
void crypto4xx_free_sa(struct crypto4xx_ctx *ctx);
void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx);
u32 crypto4xx_alloc_state_record(struct crypto4xx_ctx *ctx);
int crypto4xx_build_pd(struct crypto_async_request *req,
struct crypto4xx_ctx *ctx,
struct scatterlist *src,