[PATCH v1 3/3] crypto: sa2ul: Add support for AM64

From: Vaibhav Gupta
Date: Mon Mar 08 2021 - 15:24:34 EST

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From: Peter Ujfalusi <peter.ujfalusi@xxxxxx>

The sa2ul module in am64 have limited support for algorithms, and the
priv and priv_id used on the platform is different compared to AM654 or
j721e.

Use match data to get the SoC specific information and use it throughout
the driver.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
Signed-off-by: Vaibhav Gupta <v_gupta@xxxxxx>
---
drivers/crypto/sa2ul.c | 131 +++++++++++++++++++++++++++++------------
drivers/crypto/sa2ul.h | 4 ++
2 files changed, 96 insertions(+), 39 deletions(-)

diff --git a/drivers/crypto/sa2ul.c b/drivers/crypto/sa2ul.c
index 6107bfea862d..8a17ab8af444 100644
--- a/drivers/crypto/sa2ul.c
+++ b/drivers/crypto/sa2ul.c
@@ -69,8 +69,24 @@
/* Max Authentication tag size */
#define SA_MAX_AUTH_TAG_SZ 64

-#define PRIV_ID 0x1
-#define PRIV 0x1
+enum sa_algo_id {
+ SA_ALG_CBC_AES = 0,
+ SA_ALG_EBC_AES,
+ SA_ALG_CBC_DES3,
+ SA_ALG_ECB_DES3,
+ SA_ALG_SHA1,
+ SA_ALG_SHA256,
+ SA_ALG_SHA512,
+ SA_ALG_AUTHENC_SHA1_AES,
+ SA_ALG_AUTHENC_SHA256_AES,
+};
+
+struct sa_match_data {
+ u8 priv;
+ u8 priv_id;
+ u32 supported_algos;
+ bool skip_engine_control;
+};

static struct device *sa_k3_dev;

@@ -696,8 +712,9 @@ static void sa_dump_sc(u8 *buf, dma_addr_t dma_addr)
}

static
-int sa_init_sc(struct sa_ctx_info *ctx, const u8 *enc_key,
- u16 enc_key_sz, const u8 *auth_key, u16 auth_key_sz,
+int sa_init_sc(struct sa_ctx_info *ctx, const struct sa_match_data *match_data,
+ const u8 *enc_key, u16 enc_key_sz,
+ const u8 *auth_key, u16 auth_key_sz,
struct algo_data *ad, u8 enc, u32 *swinfo)
{
int enc_sc_offset = 0;
@@ -732,8 +749,8 @@ int sa_init_sc(struct sa_ctx_info *ctx, const u8 *enc_key,
sc_buf[SA_CTX_SCCTL_OWNER_OFFSET] = 0;
memcpy(&sc_buf[2], &sc_id, 2);
sc_buf[4] = 0x0;
- sc_buf[5] = PRIV_ID;
- sc_buf[6] = PRIV;
+ sc_buf[5] = match_data->priv_id;
+ sc_buf[6] = match_data->priv;
sc_buf[7] = 0x0;

/* Prepare context for encryption engine */
@@ -892,8 +909,8 @@ static int sa_cipher_setkey(struct crypto_skcipher *tfm, const u8 *key,
return ret;

/* Setup Encryption Security Context & Command label template */
- if (sa_init_sc(&ctx->enc, key, keylen, NULL, 0, ad, 1,
- &ctx->enc.epib[1]))
+ if (sa_init_sc(&ctx->enc, ctx->dev_data->match_data, key, keylen, NULL, 0,
+ ad, 1, &ctx->enc.epib[1]))
goto badkey;

cmdl_len = sa_format_cmdl_gen(&cfg,
@@ -905,8 +922,8 @@ static int sa_cipher_setkey(struct crypto_skcipher *tfm, const u8 *key,
ctx->enc.cmdl_size = cmdl_len;

/* Setup Decryption Security Context & Command label template */
- if (sa_init_sc(&ctx->dec, key, keylen, NULL, 0, ad, 0,
- &ctx->dec.epib[1]))
+ if (sa_init_sc(&ctx->dec, ctx->dev_data->match_data, key, keylen, NULL, 0,
+ ad, 0, &ctx->dec.epib[1]))
goto badkey;

cfg.enc_eng_id = ad->enc_eng.eng_id;
@@ -1446,9 +1463,10 @@ static int sa_sha_setup(struct sa_tfm_ctx *ctx, struct algo_data *ad)
cfg.akey = NULL;
cfg.akey_len = 0;

+ ctx->dev_data = dev_get_drvdata(sa_k3_dev);
/* Setup Encryption Security Context & Command label template */
- if (sa_init_sc(&ctx->enc, NULL, 0, NULL, 0, ad, 0,
- &ctx->enc.epib[1]))
+ if (sa_init_sc(&ctx->enc, ctx->dev_data->match_data, NULL, 0, NULL, 0,
+ ad, 0, &ctx->enc.epib[1]))
goto badkey;

cmdl_len = sa_format_cmdl_gen(&cfg,
@@ -1716,6 +1734,7 @@ static int sa_cra_init_aead(struct crypto_aead *tfm, const char *hash,
int ret;

memzero_explicit(ctx, sizeof(*ctx));
+ ctx->dev_data = data;

ctx->shash = crypto_alloc_shash(hash, 0, CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(ctx->shash)) {
@@ -1817,8 +1836,8 @@ static int sa_aead_setkey(struct crypto_aead *authenc,
cfg.akey_len = keys.authkeylen;

/* Setup Encryption Security Context & Command label template */
- if (sa_init_sc(&ctx->enc, keys.enckey, keys.enckeylen,
- keys.authkey, keys.authkeylen,
+ if (sa_init_sc(&ctx->enc, ctx->dev_data->match_data, keys.enckey,
+ keys.enckeylen, keys.authkey, keys.authkeylen,
ad, 1, &ctx->enc.epib[1]))
return -EINVAL;

@@ -1831,8 +1850,8 @@ static int sa_aead_setkey(struct crypto_aead *authenc,
ctx->enc.cmdl_size = cmdl_len;

/* Setup Decryption Security Context & Command label template */
- if (sa_init_sc(&ctx->dec, keys.enckey, keys.enckeylen,
- keys.authkey, keys.authkeylen,
+ if (sa_init_sc(&ctx->dec, ctx->dev_data->match_data, keys.enckey,
+ keys.enckeylen, keys.authkey, keys.authkeylen,
ad, 0, &ctx->dec.epib[1]))
return -EINVAL;

@@ -1950,7 +1969,7 @@ static int sa_aead_decrypt(struct aead_request *req)
}

static struct sa_alg_tmpl sa_algs[] = {
- {
+ [SA_ALG_CBC_AES] = {
.type = CRYPTO_ALG_TYPE_SKCIPHER,
.alg.skcipher = {
.base.cra_name = "cbc(aes)",
@@ -1973,7 +1992,7 @@ static struct sa_alg_tmpl sa_algs[] = {
.decrypt = sa_decrypt,
}
},
- {
+ [SA_ALG_EBC_AES] = {
.type = CRYPTO_ALG_TYPE_SKCIPHER,
.alg.skcipher = {
.base.cra_name = "ecb(aes)",
@@ -1995,7 +2014,7 @@ static struct sa_alg_tmpl sa_algs[] = {
.decrypt = sa_decrypt,
}
},
- {
+ [SA_ALG_CBC_DES3] = {
.type = CRYPTO_ALG_TYPE_SKCIPHER,
.alg.skcipher = {
.base.cra_name = "cbc(des3_ede)",
@@ -2018,7 +2037,7 @@ static struct sa_alg_tmpl sa_algs[] = {
.decrypt = sa_decrypt,
}
},
- {
+ [SA_ALG_ECB_DES3] = {
.type = CRYPTO_ALG_TYPE_SKCIPHER,
.alg.skcipher = {
.base.cra_name = "ecb(des3_ede)",
@@ -2040,7 +2059,7 @@ static struct sa_alg_tmpl sa_algs[] = {
.decrypt = sa_decrypt,
}
},
- {
+ [SA_ALG_SHA1] = {
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.ahash = {
.halg.base = {
@@ -2069,7 +2088,7 @@ static struct sa_alg_tmpl sa_algs[] = {
.import = sa_sha_import,
},
},
- {
+ [SA_ALG_SHA256] = {
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.ahash = {
.halg.base = {
@@ -2098,7 +2117,7 @@ static struct sa_alg_tmpl sa_algs[] = {
.import = sa_sha_import,
},
},
- {
+ [SA_ALG_SHA512] = {
.type = CRYPTO_ALG_TYPE_AHASH,
.alg.ahash = {
.halg.base = {
@@ -2127,7 +2146,7 @@ static struct sa_alg_tmpl sa_algs[] = {
.import = sa_sha_import,
},
},
- {
+ [SA_ALG_AUTHENC_SHA1_AES] = {
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
@@ -2154,7 +2173,7 @@ static struct sa_alg_tmpl sa_algs[] = {
.decrypt = sa_aead_decrypt,
},
},
- {
+ [SA_ALG_AUTHENC_SHA256_AES] = {
.type = CRYPTO_ALG_TYPE_AEAD,
.alg.aead = {
.base = {
@@ -2185,13 +2204,19 @@ static struct sa_alg_tmpl sa_algs[] = {
};

/* Register the algorithms in crypto framework */
-static void sa_register_algos(const struct device *dev)
+static void sa_register_algos(struct sa_crypto_data *dev_data)
{
+ const struct sa_match_data *match_data = dev_data->match_data;
+ struct device *dev = dev_data->dev;
char *alg_name;
u32 type;
int i, err;

for (i = 0; i < ARRAY_SIZE(sa_algs); i++) {
+ /* Skip unsupported algos */
+ if (!(match_data->supported_algos & BIT(i)))
+ continue;
+
type = sa_algs[i].type;
if (type == CRYPTO_ALG_TYPE_SKCIPHER) {
alg_name = sa_algs[i].alg.skcipher.base.cra_name;
@@ -2329,14 +2354,39 @@ static int sa_link_child(struct device *dev, void *data)
return 0;
}

+static struct sa_match_data am654_match_data = {
+ .priv = 1,
+ .priv_id = 1,
+ .supported_algos = GENMASK(SA_ALG_AUTHENC_SHA256_AES, 0),
+};
+
+static struct sa_match_data am64_match_data = {
+ .priv = 0,
+ .priv_id = 0,
+ .supported_algos = BIT(SA_ALG_CBC_AES) |
+ BIT(SA_ALG_EBC_AES) |
+ BIT(SA_ALG_SHA256) |
+ BIT(SA_ALG_SHA512) |
+ BIT(SA_ALG_AUTHENC_SHA256_AES),
+ .skip_engine_control = true,
+};
+
+static const struct of_device_id of_match[] = {
+ { .compatible = "ti,j721e-sa2ul", .data = &am654_match_data, },
+ { .compatible = "ti,am654-sa2ul", .data = &am654_match_data, },
+ { .compatible = "ti,am64-sa2ul", .data = &am64_match_data, },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_match);
+
static int sa_ul_probe(struct platform_device *pdev)
{
+ const struct of_device_id *match;
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct resource *res;
static void __iomem *saul_base;
struct sa_crypto_data *dev_data;
- u32 val;
int ret;

dev_data = devm_kzalloc(dev, sizeof(*dev_data), GFP_KERNEL);
@@ -2362,18 +2412,28 @@ static int sa_ul_probe(struct platform_device *pdev)
if (ret)
goto disable_pm_runtime;

+ match = of_match_node(of_match, dev->of_node);
+ if (!match) {
+ dev_err(dev, "No compatible match found\n");
+ return -ENODEV;
+ }
+ dev_data->match_data = match->data;
+
spin_lock_init(&dev_data->scid_lock);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
saul_base = devm_ioremap_resource(dev, res);

dev_data->base = saul_base;
- val = SA_EEC_ENCSS_EN | SA_EEC_AUTHSS_EN | SA_EEC_CTXCACH_EN |
- SA_EEC_CPPI_PORT_IN_EN | SA_EEC_CPPI_PORT_OUT_EN |
- SA_EEC_TRNG_EN;

- writel_relaxed(val, saul_base + SA_ENGINE_ENABLE_CONTROL);
+ if (!dev_data->match_data->skip_engine_control) {
+ u32 val = SA_EEC_ENCSS_EN | SA_EEC_AUTHSS_EN | SA_EEC_CTXCACH_EN |
+ SA_EEC_CPPI_PORT_IN_EN | SA_EEC_CPPI_PORT_OUT_EN |
+ SA_EEC_TRNG_EN;

- sa_register_algos(dev);
+ writel_relaxed(val, saul_base + SA_ENGINE_ENABLE_CONTROL);
+ }
+
+ sa_register_algos(dev_data);

ret = of_platform_populate(node, NULL, NULL, &pdev->dev);
if (ret)
@@ -2419,13 +2479,6 @@ static int sa_ul_remove(struct platform_device *pdev)
return 0;
}

-static const struct of_device_id of_match[] = {
- {.compatible = "ti,j721e-sa2ul",},
- {.compatible = "ti,am654-sa2ul",},
- {},
-};
-MODULE_DEVICE_TABLE(of, of_match);
-
static struct platform_driver sa_ul_driver = {
.probe = sa_ul_probe,
.remove = sa_ul_remove,
diff --git a/drivers/crypto/sa2ul.h b/drivers/crypto/sa2ul.h
index f597ddecde34..ed66d1f111db 100644
--- a/drivers/crypto/sa2ul.h
+++ b/drivers/crypto/sa2ul.h
@@ -171,9 +171,12 @@ struct sa_tfm_ctx;
#define SA_UNSAFE_DATA_SZ_MIN 240
#define SA_UNSAFE_DATA_SZ_MAX 256

+struct sa_match_data;
+
/**
* struct sa_crypto_data - Crypto driver instance data
* @base: Base address of the register space
+ * @soc_data: Pointer to SoC specific data
* @pdev: Platform device pointer
* @sc_pool: security context pool
* @dev: Device pointer
@@ -189,6 +192,7 @@ struct sa_tfm_ctx;
*/
struct sa_crypto_data {
void __iomem *base;
+ const struct sa_match_data *match_data;
struct platform_device *pdev;
struct dma_pool *sc_pool;
struct device *dev;
--
2.30.1

Next message: irqchip-bot for Marc Zyngier: "[irqchip: irq/irqchip-next] ARM: ep93xx: Select GENERIC_IRQ_MULTI_HANDLER directly"
Previous message: Vaibhav Gupta: "[PATCH v1 1/3] dt-bindings: crypto: ti,sa2ul: Add new compatible for AM64"
In reply to: Vaibhav Gupta: "[PATCH v1 1/3] dt-bindings: crypto: ti,sa2ul: Add new compatible for AM64"
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