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crypto: inside-secure - enable context reuse

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The context given to the crypto engine can be reused over time. While
the driver was designed to allow this, the feature wasn't enabled in the
hardware engine. This patch enables it.

Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Antoine Tenart 2019-05-27 16:50:59 +02:00 committed by Herbert Xu
parent 082a9d0918
commit 97a1440d12
3 changed files with 16 additions and 0 deletions
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6
drivers/crypto/inside-secure/safexcel.c
View File

@ -398,6 +398,12 @@ static int safexcel_hw_init(struct safexcel_crypto_priv *priv)
/* Processing Engine configuration */
/* Token & context configuration */
val = EIP197_PE_EIP96_TOKEN_CTRL_CTX_UPDATES |
EIP197_PE_EIP96_TOKEN_CTRL_REUSE_CTX |
EIP197_PE_EIP96_TOKEN_CTRL_POST_REUSE_CTX;
writel(val, EIP197_PE(priv) + EIP197_PE_EIP96_TOKEN_CTRL(pe));
/* H/W capabilities selection */
val = EIP197_FUNCTION_RSVD;
val |= EIP197_PROTOCOL_ENCRYPT_ONLY | EIP197_PROTOCOL_HASH_ONLY;

7
drivers/crypto/inside-secure/safexcel.h
View File

@ -118,6 +118,7 @@
#define EIP197_PE_ICE_SCRATCH_CTRL(n) (0x0d04 + (0x2000 * (n)))
#define EIP197_PE_ICE_FPP_CTRL(n) (0x0d80 + (0x2000 * (n)))
#define EIP197_PE_ICE_RAM_CTRL(n) (0x0ff0 + (0x2000 * (n)))
#define EIP197_PE_EIP96_TOKEN_CTRL(n) (0x1000 + (0x2000 * (n)))
#define EIP197_PE_EIP96_FUNCTION_EN(n) (0x1004 + (0x2000 * (n)))
#define EIP197_PE_EIP96_CONTEXT_CTRL(n) (0x1008 + (0x2000 * (n)))
#define EIP197_PE_EIP96_CONTEXT_STAT(n) (0x100c + (0x2000 * (n)))
@ -249,6 +250,11 @@
#define EIP197_PE_ICE_RAM_CTRL_PUE_PROG_EN BIT(0)
#define EIP197_PE_ICE_RAM_CTRL_FPP_PROG_EN BIT(1)
/* EIP197_PE_EIP96_TOKEN_CTRL */
#define EIP197_PE_EIP96_TOKEN_CTRL_CTX_UPDATES BIT(16)
#define EIP197_PE_EIP96_TOKEN_CTRL_REUSE_CTX BIT(19)
#define EIP197_PE_EIP96_TOKEN_CTRL_POST_REUSE_CTX BIT(20)
/* EIP197_PE_EIP96_FUNCTION_EN */
#define EIP197_FUNCTION_RSVD (BIT(6) | BIT(15) | BIT(20) | BIT(23))
#define EIP197_PROTOCOL_HASH_ONLY BIT(0)
@ -468,6 +474,7 @@ struct safexcel_control_data_desc {
#define EIP197_OPTION_MAGIC_VALUE BIT(0)
#define EIP197_OPTION_64BIT_CTX BIT(1)
#define EIP197_OPTION_RC_AUTO (0x2 << 3)
#define EIP197_OPTION_CTX_CTRL_IN_CMD BIT(8)
#define EIP197_OPTION_2_TOKEN_IV_CMD GENMASK(11, 10)
#define EIP197_OPTION_4_TOKEN_IV_CMD GENMASK(11, 9)

3
drivers/crypto/inside-secure/safexcel_ring.c
View File

@ -145,6 +145,9 @@ struct safexcel_command_desc *safexcel_add_cdesc(struct safexcel_crypto_priv *pr
(lower_32_bits(context) & GENMASK(31, 2)) >> 2;
cdesc->control_data.context_hi = upper_32_bits(context);
if (priv->version == EIP197B || priv->version == EIP197D)
cdesc->control_data.options |= EIP197_OPTION_RC_AUTO;
/* TODO: large xform HMAC with SHA-384/512 uses refresh = 3 */
cdesc->control_data.refresh = 2;