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authorKim Phillips <kim.phillips@freescale.com>2011-05-14 22:08:17 -0500
committerHerbert Xu <herbert@gondor.apana.org.au>2011-05-19 14:38:00 +1000
commit4427b1b4ec111622071ec872c94594e05635c6e9 (patch)
tree7dc473bef53f78ea754260081f0de110e899d4e9 /drivers/crypto
parent66664487b137d71fd43667ac2a6a90970a040eb7 (diff)
crypto: caam - add support for sha512 variants of existing AEAD algorithms
In doing so, sha512 sized keys would not fit with the current descriptor inlining mechanism, so we now calculate whether keys should be referenced instead by pointers in the shared descriptor. also, use symbols for descriptor text lengths, and, ahem, unmap and free key i/o memory in cra_exit. Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/caam/caamalg.c119
-rw-r--r--drivers/crypto/caam/desc_constr.h1
2 files changed, 107 insertions, 13 deletions
diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
index 672abf35d03..d0e65d6ddc7 100644
--- a/drivers/crypto/caam/caamalg.c
+++ b/drivers/crypto/caam/caamalg.c
@@ -61,6 +61,12 @@
/* max IV is max of AES_BLOCK_SIZE, DES3_EDE_BLOCK_SIZE */
#define CAAM_MAX_IV_LENGTH 16
+/* length of descriptors text */
+#define DESC_AEAD_SHARED_TEXT_LEN 4
+#define DESC_AEAD_ENCRYPT_TEXT_LEN 21
+#define DESC_AEAD_DECRYPT_TEXT_LEN 24
+#define DESC_AEAD_GIVENCRYPT_TEXT_LEN 27
+
#ifdef DEBUG
/* for print_hex_dumps with line references */
#define xstr(s) str(s)
@@ -219,10 +225,22 @@ static int build_sh_desc_ipsec(struct caam_ctx *ctx)
struct device *jrdev = ctx->jrdev;
u32 *sh_desc;
u32 *jump_cmd;
+ bool keys_fit_inline = 0;
+
+ /*
+ * largest Job Descriptor and its Shared Descriptor
+ * must both fit into the 64-word Descriptor h/w Buffer
+ */
+ if ((DESC_AEAD_GIVENCRYPT_TEXT_LEN +
+ DESC_AEAD_SHARED_TEXT_LEN) * CAAM_CMD_SZ +
+ ctx->split_key_pad_len + ctx->enckeylen <= CAAM_DESC_BYTES_MAX)
+ keys_fit_inline = 1;
/* build shared descriptor for this session */
- sh_desc = kmalloc(CAAM_CMD_SZ * 4 + ctx->split_key_pad_len +
- ctx->enckeylen, GFP_DMA | GFP_KERNEL);
+ sh_desc = kmalloc(CAAM_CMD_SZ * DESC_AEAD_SHARED_TEXT_LEN +
+ keys_fit_inline ?
+ ctx->split_key_pad_len + ctx->enckeylen :
+ CAAM_PTR_SZ * 2, GFP_DMA | GFP_KERNEL);
if (!sh_desc) {
dev_err(jrdev, "could not allocate shared descriptor\n");
return -ENOMEM;
@@ -233,14 +251,23 @@ static int build_sh_desc_ipsec(struct caam_ctx *ctx)
jump_cmd = append_jump(sh_desc, CLASS_BOTH | JUMP_TEST_ALL |
JUMP_COND_SHRD | JUMP_COND_SELF);
- /* process keys, starting with class 2/authentication */
- append_key_as_imm(sh_desc, ctx->key, ctx->split_key_pad_len,
- ctx->split_key_len,
- CLASS_2 | KEY_DEST_MDHA_SPLIT | KEY_ENC);
-
- append_key_as_imm(sh_desc, (void *)ctx->key + ctx->split_key_pad_len,
- ctx->enckeylen, ctx->enckeylen,
- CLASS_1 | KEY_DEST_CLASS_REG);
+ /*
+ * process keys, starting with class 2/authentication.
+ */
+ if (keys_fit_inline) {
+ append_key_as_imm(sh_desc, ctx->key, ctx->split_key_pad_len,
+ ctx->split_key_len,
+ CLASS_2 | KEY_DEST_MDHA_SPLIT | KEY_ENC);
+
+ append_key_as_imm(sh_desc, (void *)ctx->key +
+ ctx->split_key_pad_len, ctx->enckeylen,
+ ctx->enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
+ } else {
+ append_key(sh_desc, ctx->key_phys, ctx->split_key_len, CLASS_2 |
+ KEY_DEST_MDHA_SPLIT | KEY_ENC);
+ append_key(sh_desc, ctx->key_phys + ctx->split_key_pad_len,
+ ctx->enckeylen, CLASS_1 | KEY_DEST_CLASS_REG);
+ }
/* update jump cmd now that we are at the jump target */
set_jump_tgt_here(sh_desc, jump_cmd);
@@ -746,7 +773,8 @@ static int aead_authenc_encrypt(struct aead_request *areq)
dma_addr_t iv_dma;
/* allocate extended descriptor */
- edesc = ipsec_esp_edesc_alloc(areq, 21 * sizeof(u32));
+ edesc = ipsec_esp_edesc_alloc(areq, DESC_AEAD_ENCRYPT_TEXT_LEN *
+ CAAM_CMD_SZ);
if (IS_ERR(edesc))
return PTR_ERR(edesc);
@@ -778,7 +806,8 @@ static int aead_authenc_decrypt(struct aead_request *req)
req->cryptlen -= ctx->authsize;
/* allocate extended descriptor */
- edesc = ipsec_esp_edesc_alloc(req, 24 * sizeof(u32));
+ edesc = ipsec_esp_edesc_alloc(req, DESC_AEAD_DECRYPT_TEXT_LEN *
+ CAAM_CMD_SZ);
if (IS_ERR(edesc))
return PTR_ERR(edesc);
@@ -813,7 +842,8 @@ static int aead_authenc_givencrypt(struct aead_givcrypt_request *req)
debug("%s: giv %p\n", __func__, req->giv);
/* allocate extended descriptor */
- edesc = ipsec_esp_edesc_alloc(areq, 27 * sizeof(u32));
+ edesc = ipsec_esp_edesc_alloc(areq, DESC_AEAD_GIVENCRYPT_TEXT_LEN *
+ CAAM_CMD_SZ);
if (IS_ERR(edesc))
return PTR_ERR(edesc);
@@ -904,6 +934,25 @@ static struct caam_alg_template driver_algs[] = {
.alg_op = OP_ALG_ALGSEL_SHA256 | OP_ALG_AAI_HMAC,
},
{
+ .name = "authenc(hmac(sha512),cbc(aes))",
+ .driver_name = "authenc-hmac-sha512-cbc-aes-caam",
+ .blocksize = AES_BLOCK_SIZE,
+ .aead = {
+ .setkey = aead_authenc_setkey,
+ .setauthsize = aead_authenc_setauthsize,
+ .encrypt = aead_authenc_encrypt,
+ .decrypt = aead_authenc_decrypt,
+ .givencrypt = aead_authenc_givencrypt,
+ .geniv = "<built-in>",
+ .ivsize = AES_BLOCK_SIZE,
+ .maxauthsize = SHA512_DIGEST_SIZE,
+ },
+ .class1_alg_type = OP_ALG_ALGSEL_AES | OP_ALG_AAI_CBC,
+ .class2_alg_type = OP_ALG_ALGSEL_SHA512 |
+ OP_ALG_AAI_HMAC_PRECOMP,
+ .alg_op = OP_ALG_ALGSEL_SHA512 | OP_ALG_AAI_HMAC,
+ },
+ {
.name = "authenc(hmac(sha1),cbc(des3_ede))",
.driver_name = "authenc-hmac-sha1-cbc-des3_ede-caam",
.blocksize = DES3_EDE_BLOCK_SIZE,
@@ -941,6 +990,25 @@ static struct caam_alg_template driver_algs[] = {
.alg_op = OP_ALG_ALGSEL_SHA256 | OP_ALG_AAI_HMAC,
},
{
+ .name = "authenc(hmac(sha512),cbc(des3_ede))",
+ .driver_name = "authenc-hmac-sha512-cbc-des3_ede-caam",
+ .blocksize = DES3_EDE_BLOCK_SIZE,
+ .aead = {
+ .setkey = aead_authenc_setkey,
+ .setauthsize = aead_authenc_setauthsize,
+ .encrypt = aead_authenc_encrypt,
+ .decrypt = aead_authenc_decrypt,
+ .givencrypt = aead_authenc_givencrypt,
+ .geniv = "<built-in>",
+ .ivsize = DES3_EDE_BLOCK_SIZE,
+ .maxauthsize = SHA512_DIGEST_SIZE,
+ },
+ .class1_alg_type = OP_ALG_ALGSEL_3DES | OP_ALG_AAI_CBC,
+ .class2_alg_type = OP_ALG_ALGSEL_SHA512 |
+ OP_ALG_AAI_HMAC_PRECOMP,
+ .alg_op = OP_ALG_ALGSEL_SHA512 | OP_ALG_AAI_HMAC,
+ },
+ {
.name = "authenc(hmac(sha1),cbc(des))",
.driver_name = "authenc-hmac-sha1-cbc-des-caam",
.blocksize = DES_BLOCK_SIZE,
@@ -977,6 +1045,25 @@ static struct caam_alg_template driver_algs[] = {
OP_ALG_AAI_HMAC_PRECOMP,
.alg_op = OP_ALG_ALGSEL_SHA256 | OP_ALG_AAI_HMAC,
},
+ {
+ .name = "authenc(hmac(sha512),cbc(des))",
+ .driver_name = "authenc-hmac-sha512-cbc-des-caam",
+ .blocksize = DES_BLOCK_SIZE,
+ .aead = {
+ .setkey = aead_authenc_setkey,
+ .setauthsize = aead_authenc_setauthsize,
+ .encrypt = aead_authenc_encrypt,
+ .decrypt = aead_authenc_decrypt,
+ .givencrypt = aead_authenc_givencrypt,
+ .geniv = "<built-in>",
+ .ivsize = DES_BLOCK_SIZE,
+ .maxauthsize = SHA512_DIGEST_SIZE,
+ },
+ .class1_alg_type = OP_ALG_ALGSEL_DES | OP_ALG_AAI_CBC,
+ .class2_alg_type = OP_ALG_ALGSEL_SHA512 |
+ OP_ALG_AAI_HMAC_PRECOMP,
+ .alg_op = OP_ALG_ALGSEL_SHA512 | OP_ALG_AAI_HMAC,
+ },
};
struct caam_crypto_alg {
@@ -1019,6 +1106,12 @@ static void caam_cra_exit(struct crypto_tfm *tfm)
dma_unmap_single(ctx->jrdev, ctx->shared_desc_phys,
desc_bytes(ctx->sh_desc), DMA_TO_DEVICE);
kfree(ctx->sh_desc);
+
+ if (!dma_mapping_error(ctx->jrdev, ctx->key_phys))
+ dma_unmap_single(ctx->jrdev, ctx->key_phys,
+ ctx->split_key_pad_len + ctx->enckeylen,
+ DMA_TO_DEVICE);
+ kfree(ctx->key);
}
static void __exit caam_algapi_exit(void)
diff --git a/drivers/crypto/caam/desc_constr.h b/drivers/crypto/caam/desc_constr.h
index c224f39e94a..46915800c26 100644
--- a/drivers/crypto/caam/desc_constr.h
+++ b/drivers/crypto/caam/desc_constr.h
@@ -9,6 +9,7 @@
#define IMMEDIATE (1 << 23)
#define CAAM_CMD_SZ sizeof(u32)
#define CAAM_PTR_SZ sizeof(dma_addr_t)
+#define CAAM_DESC_BYTES_MAX (CAAM_CMD_SZ * 64)
#ifdef DEBUG
#define PRINT_POS do { printk(KERN_DEBUG "%02d: %s\n", desc_len(desc),\