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crypto: ccp - CCP versioning support

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Future hardware may introduce new algorithms wherein the
driver will need to manage resources for different versions
of the cryptographic coprocessor. This precursor patch
determines the version of the available device, and marks
and registers algorithms accordingly. A structure is added
which manages the version-specific data.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Gary R Hook
2016-03-01 13:49:15 -06:00
committed by Herbert Xu
parent 553d2374db
commit c7019c4d73
7 changed files with 115 additions and 5 deletions
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9
drivers/crypto/ccp/ccp-crypto-sha.c
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@@ -1,7 +1,7 @@
/*
* AMD Cryptographic Coprocessor (CCP) SHA crypto API support
*
* Copyright (C) 2013 Advanced Micro Devices, Inc.
* Copyright (C) 2013,2016 Advanced Micro Devices, Inc.
*
* Author: Tom Lendacky <thomas.lendacky@amd.com>
*
@@ -341,6 +341,7 @@ static void ccp_hmac_sha_cra_exit(struct crypto_tfm *tfm)
}
struct ccp_sha_def {
unsigned int version;
const char *name;
const char *drv_name;
enum ccp_sha_type type;
@@ -350,6 +351,7 @@ struct ccp_sha_def {
static struct ccp_sha_def sha_algs[] = {
{
.version = CCP_VERSION(3, 0),
.name = "sha1",
.drv_name = "sha1-ccp",
.type = CCP_SHA_TYPE_1,
@@ -357,6 +359,7 @@ static struct ccp_sha_def sha_algs[] = {
.block_size = SHA1_BLOCK_SIZE,
},
{
.version = CCP_VERSION(3, 0),
.name = "sha224",
.drv_name = "sha224-ccp",
.type = CCP_SHA_TYPE_224,
@@ -364,6 +367,7 @@ static struct ccp_sha_def sha_algs[] = {
.block_size = SHA224_BLOCK_SIZE,
},
{
.version = CCP_VERSION(3, 0),
.name = "sha256",
.drv_name = "sha256-ccp",
.type = CCP_SHA_TYPE_256,
@@ -480,8 +484,11 @@ static int ccp_register_sha_alg(struct list_head *head,
int ccp_register_sha_algs(struct list_head *head)
{
int i, ret;
unsigned int ccpversion = ccp_version();
for (i = 0; i < ARRAY_SIZE(sha_algs); i++) {
if (sha_algs[i].version > ccpversion)
continue;
ret = ccp_register_sha_alg(head, &sha_algs[i]);
if (ret)
return ret;