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crypto: ccree - add HW engine config check

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Add check to verify the stated device tree HW configuration
matches the HW.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Gilad Ben-Yossef 2019-06-17 11:46:30 +03:00 committed by Herbert Xu
parent 3db617e77a
commit 303f99ac94
3 changed files with 38 additions and 0 deletions
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18
drivers/crypto/ccree/cc_driver.c
View File

@ -408,6 +408,24 @@ static int init_cc_resources(struct platform_device *plat_dev)
}
sig_cidr = val;
/* Check HW engine configuration */
val = cc_ioread(new_drvdata, CC_REG(HOST_REMOVE_INPUT_PINS));
switch (val) {
case CC_PINS_FULL:
/* This is fine */
break;
case CC_PINS_SLIM:
if (new_drvdata->std_bodies & CC_STD_NIST) {
dev_warn(dev, "703 mode forced due to HW configuration.\n");
new_drvdata->std_bodies = CC_STD_OSCCA;
}
break;
default:
dev_err(dev, "Unsupported engines configration.\n");
rc = -EINVAL;
goto post_clk_err;
}
/* Check security disable state */
val = cc_ioread(new_drvdata, CC_REG(SECURITY_DISABLED));
val &= CC_SECURITY_DISABLED_MASK;

3
drivers/crypto/ccree/cc_driver.h
View File

@ -53,6 +53,9 @@ enum cc_std_body {
#define CC_COHERENT_CACHE_PARAMS 0xEEE
#define CC_PINS_FULL 0x0
#define CC_PINS_SLIM 0x9F
/* Maximum DMA mask supported by IP */
#define DMA_BIT_MASK_LEN 48

17
drivers/crypto/ccree/cc_host_regs.h
View File

@ -206,6 +206,23 @@
#define CC_HOST_POWER_DOWN_EN_REG_OFFSET 0xA78UL
#define CC_HOST_POWER_DOWN_EN_VALUE_BIT_SHIFT 0x0UL
#define CC_HOST_POWER_DOWN_EN_VALUE_BIT_SIZE 0x1UL
#define CC_HOST_REMOVE_INPUT_PINS_REG_OFFSET 0x0A7CUL
#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_AES_ENGINE_BIT_SHIFT 0x0UL
#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_AES_ENGINE_BIT_SIZE 0x1UL
#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_AES_MAC_ENGINE_BIT_SHIFT 0x1UL
#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_AES_MAC_ENGINE_BIT_SIZE 0x1UL
#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_GHASH_ENGINE_BIT_SHIFT 0x2UL
#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_GHASH_ENGINE_BIT_SIZE 0x1UL
#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_DES_ENGINE_BIT_SHIFT 0x3UL
#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_DES_ENGINE_BIT_SIZE 0x1UL
#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_HASH_ENGINE_BIT_SHIFT 0x4UL
#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_HASH_ENGINE_BIT_SIZE 0x1UL
#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_SM3_ENGINE_BIT_SHIFT 0x5UL
#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_SM3_ENGINE_BIT_SIZE 0x1UL
#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_SM4_ENGINE_BIT_SHIFT 0x6UL
#define CC_HOST_REMOVE_INPUT_PINS_REMOVE_SM4_ENGINE_BIT_SIZE 0x1UL
#define CC_HOST_REMOVE_INPUT_PINS_OTP_DISCONNECTED_BIT_SHIFT 0x7UL
#define CC_HOST_REMOVE_INPUT_PINS_OTP_DISCONNECTED_BIT_SIZE 0x1UL
// --------------------------------------
// BLOCK: ID_REGISTERS
// --------------------------------------