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Subject[PATCH 05/14] crypto: inside-secure - add an invalidation flag
Date
Add a flags field in the private structure, and a first flag for engines
needing context invalidation (currently only the eip197b). The
invalidation is needed when the engine includes a TRC cache, which will
also be true for the upcoming addition of the eip197d engine.

Suggested-by: Ofer Heifetz <oferh@marvell.com>
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
---
drivers/crypto/inside-secure/safexcel.c | 3 +++
drivers/crypto/inside-secure/safexcel.h | 5 +++++
drivers/crypto/inside-secure/safexcel_cipher.c | 16 ++++++++--------
drivers/crypto/inside-secure/safexcel_hash.c | 8 ++++----
4 files changed, 20 insertions(+), 12 deletions(-)

diff --git a/drivers/crypto/inside-secure/safexcel.c b/drivers/crypto/inside-secure/safexcel.c
index b2749ff933c8..579e7ae2cb14 100644
--- a/drivers/crypto/inside-secure/safexcel.c
+++ b/drivers/crypto/inside-secure/safexcel.c
@@ -927,6 +927,9 @@ static int safexcel_probe(struct platform_device *pdev)
priv->dev = dev;
priv->version = (enum safexcel_eip_version)of_device_get_match_data(dev);

+ if (priv->version == EIP197B)
+ priv->flags |= EIP197_TRC_CACHE;
+
safexcel_init_register_offsets(priv);

res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
diff --git a/drivers/crypto/inside-secure/safexcel.h b/drivers/crypto/inside-secure/safexcel.h
index b79cb36b3772..f62111eba30d 100644
--- a/drivers/crypto/inside-secure/safexcel.h
+++ b/drivers/crypto/inside-secure/safexcel.h
@@ -546,6 +546,10 @@ struct safexcel_register_offsets {
u32 pe;
};

+enum safexcel_flags {
+ EIP197_TRC_CACHE = BIT(0),
+};
+
struct safexcel_crypto_priv {
void __iomem *base;
struct device *dev;
@@ -555,6 +559,7 @@ struct safexcel_crypto_priv {

enum safexcel_eip_version version;
struct safexcel_register_offsets offsets;
+ u32 flags;

/* context DMA pool */
struct dma_pool *context_pool;
diff --git a/drivers/crypto/inside-secure/safexcel_cipher.c b/drivers/crypto/inside-secure/safexcel_cipher.c
index bf3de334c580..566c97223d67 100644
--- a/drivers/crypto/inside-secure/safexcel_cipher.c
+++ b/drivers/crypto/inside-secure/safexcel_cipher.c
@@ -145,7 +145,7 @@ static int safexcel_skcipher_aes_setkey(struct crypto_skcipher *ctfm,
return ret;
}

- if (priv->version == EIP197B && ctx->base.ctxr_dma) {
+ if (priv->flags & EIP197_TRC_CACHE && ctx->base.ctxr_dma) {
for (i = 0; i < len / sizeof(u32); i++) {
if (ctx->key[i] != cpu_to_le32(aes.key_enc[i])) {
ctx->base.needs_inv = true;
@@ -179,7 +179,7 @@ static int safexcel_aead_aes_setkey(struct crypto_aead *ctfm, const u8 *key,
goto badkey;

/* Encryption key */
- if (priv->version == EIP197B && ctx->base.ctxr_dma &&
+ if (priv->flags & EIP197_TRC_CACHE && ctx->base.ctxr_dma &&
memcmp(ctx->key, keys.enckey, keys.enckeylen))
ctx->base.needs_inv = true;

@@ -218,7 +218,7 @@ static int safexcel_aead_aes_setkey(struct crypto_aead *ctfm, const u8 *key,
crypto_aead_set_flags(ctfm, crypto_aead_get_flags(ctfm) &
CRYPTO_TFM_RES_MASK);

- if (priv->version == EIP197B && ctx->base.ctxr_dma &&
+ if (priv->flags & EIP197_TRC_CACHE && ctx->base.ctxr_dma &&
(memcmp(ctx->ipad, istate.state, ctx->state_sz) ||
memcmp(ctx->opad, ostate.state, ctx->state_sz)))
ctx->base.needs_inv = true;
@@ -612,7 +612,7 @@ static int safexcel_skcipher_send(struct crypto_async_request *async, int ring,
struct safexcel_crypto_priv *priv = ctx->priv;
int ret;

- BUG_ON(priv->version == EIP97IES && sreq->needs_inv);
+ BUG_ON(!(priv->flags & EIP197_TRC_CACHE) && sreq->needs_inv);

if (sreq->needs_inv)
ret = safexcel_cipher_send_inv(async, ring, request, commands,
@@ -635,7 +635,7 @@ static int safexcel_aead_send(struct crypto_async_request *async, int ring,
struct safexcel_crypto_priv *priv = ctx->priv;
int ret;

- BUG_ON(priv->version == EIP97IES && sreq->needs_inv);
+ BUG_ON(!(priv->flags & EIP197_TRC_CACHE) && sreq->needs_inv);

if (sreq->needs_inv)
ret = safexcel_cipher_send_inv(async, ring, request, commands,
@@ -725,7 +725,7 @@ static int safexcel_aes(struct crypto_async_request *base,
ctx->mode = mode;

if (ctx->base.ctxr) {
- if (priv->version == EIP197B && ctx->base.needs_inv) {
+ if (priv->flags & EIP197_TRC_CACHE && ctx->base.needs_inv) {
sreq->needs_inv = true;
ctx->base.needs_inv = false;
}
@@ -802,7 +802,7 @@ static void safexcel_skcipher_cra_exit(struct crypto_tfm *tfm)
if (safexcel_cipher_cra_exit(tfm))
return;

- if (priv->version == EIP197B) {
+ if (priv->flags & EIP197_TRC_CACHE) {
ret = safexcel_skcipher_exit_inv(tfm);
if (ret)
dev_warn(priv->dev, "skcipher: invalidation error %d\n",
@@ -822,7 +822,7 @@ static void safexcel_aead_cra_exit(struct crypto_tfm *tfm)
if (safexcel_cipher_cra_exit(tfm))
return;

- if (priv->version == EIP197B) {
+ if (priv->flags & EIP197_TRC_CACHE) {
ret = safexcel_aead_exit_inv(tfm);
if (ret)
dev_warn(priv->dev, "aead: invalidation error %d\n",
diff --git a/drivers/crypto/inside-secure/safexcel_hash.c b/drivers/crypto/inside-secure/safexcel_hash.c
index 66edc1f388f1..94841df4b6bd 100644
--- a/drivers/crypto/inside-secure/safexcel_hash.c
+++ b/drivers/crypto/inside-secure/safexcel_hash.c
@@ -442,7 +442,7 @@ static int safexcel_handle_result(struct safexcel_crypto_priv *priv, int ring,
struct safexcel_ahash_req *req = ahash_request_ctx(areq);
int err;

- BUG_ON(priv->version == EIP97IES && req->needs_inv);
+ BUG_ON(!(priv->flags & EIP197_TRC_CACHE) && req->needs_inv);

if (req->needs_inv) {
req->needs_inv = false;
@@ -575,7 +575,7 @@ static int safexcel_ahash_enqueue(struct ahash_request *areq)
req->needs_inv = false;

if (ctx->base.ctxr) {
- if (priv->version == EIP197B && !ctx->base.needs_inv &&
+ if (priv->flags & EIP197_TRC_CACHE && !ctx->base.needs_inv &&
(req->processed[0] || req->processed[1]) &&
req->digest == CONTEXT_CONTROL_DIGEST_PRECOMPUTED)
/* We're still setting needs_inv here, even though it is
@@ -784,7 +784,7 @@ static void safexcel_ahash_cra_exit(struct crypto_tfm *tfm)
if (!ctx->base.ctxr)
return;

- if (priv->version == EIP197B) {
+ if (priv->flags & EIP197_TRC_CACHE) {
ret = safexcel_ahash_exit_inv(tfm);
if (ret)
dev_warn(priv->dev, "hash: invalidation error %d\n", ret);
@@ -1005,7 +1005,7 @@ static int safexcel_hmac_alg_setkey(struct crypto_ahash *tfm, const u8 *key,
if (ret)
return ret;

- if (priv->version == EIP197B && ctx->base.ctxr) {
+ if (priv->flags & EIP197_TRC_CACHE && ctx->base.ctxr) {
for (i = 0; i < state_sz / sizeof(u32); i++) {
if (ctx->ipad[i] != le32_to_cpu(istate.state[i]) ||
ctx->opad[i] != le32_to_cpu(ostate.state[i])) {
--
2.17.1
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