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path: root/drivers/crypto/nx/nx-sha256.c
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Diffstat (limited to 'drivers/crypto/nx/nx-sha256.c')
-rw-r--r--drivers/crypto/nx/nx-sha256.c130
1 files changed, 51 insertions, 79 deletions
diff --git a/drivers/crypto/nx/nx-sha256.c b/drivers/crypto/nx/nx-sha256.c
index c3bebf0feabe..5b29dd026df2 100644
--- a/drivers/crypto/nx/nx-sha256.c
+++ b/drivers/crypto/nx/nx-sha256.c
@@ -9,9 +9,12 @@
#include <crypto/internal/hash.h>
#include <crypto/sha2.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
#include <linux/module.h>
-#include <asm/vio.h>
-#include <asm/byteorder.h>
+#include <linux/spinlock.h>
+#include <linux/string.h>
+#include <linux/unaligned.h>
#include "nx_csbcpb.h"
#include "nx.h"
@@ -19,12 +22,11 @@
struct sha256_state_be {
__be32 state[SHA256_DIGEST_SIZE / 4];
u64 count;
- u8 buf[SHA256_BLOCK_SIZE];
};
-static int nx_crypto_ctx_sha256_init(struct crypto_tfm *tfm)
+static int nx_crypto_ctx_sha256_init(struct crypto_shash *tfm)
{
- struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(tfm);
+ struct nx_crypto_ctx *nx_ctx = crypto_shash_ctx(tfm);
int err;
err = nx_crypto_ctx_sha_init(tfm);
@@ -40,11 +42,10 @@ static int nx_crypto_ctx_sha256_init(struct crypto_tfm *tfm)
return 0;
}
-static int nx_sha256_init(struct shash_desc *desc) {
+static int nx_sha256_init(struct shash_desc *desc)
+{
struct sha256_state_be *sctx = shash_desc_ctx(desc);
- memset(sctx, 0, sizeof *sctx);
-
sctx->state[0] = __cpu_to_be32(SHA256_H0);
sctx->state[1] = __cpu_to_be32(SHA256_H1);
sctx->state[2] = __cpu_to_be32(SHA256_H2);
@@ -61,30 +62,18 @@ static int nx_sha256_init(struct shash_desc *desc) {
static int nx_sha256_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
+ struct nx_crypto_ctx *nx_ctx = crypto_shash_ctx(desc->tfm);
struct sha256_state_be *sctx = shash_desc_ctx(desc);
- struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
struct nx_csbcpb *csbcpb = (struct nx_csbcpb *)nx_ctx->csbcpb;
+ u64 to_process, leftover, total = len;
struct nx_sg *out_sg;
- u64 to_process = 0, leftover, total;
unsigned long irq_flags;
int rc = 0;
int data_len;
u32 max_sg_len;
- u64 buf_len = (sctx->count % SHA256_BLOCK_SIZE);
spin_lock_irqsave(&nx_ctx->lock, irq_flags);
- /* 2 cases for total data len:
- * 1: < SHA256_BLOCK_SIZE: copy into state, return 0
- * 2: >= SHA256_BLOCK_SIZE: process X blocks, copy in leftover
- */
- total = (sctx->count % SHA256_BLOCK_SIZE) + len;
- if (total < SHA256_BLOCK_SIZE) {
- memcpy(sctx->buf + buf_len, data, len);
- sctx->count += len;
- goto out;
- }
-
memcpy(csbcpb->cpb.sha256.message_digest, sctx->state, SHA256_DIGEST_SIZE);
NX_CPB_FDM(csbcpb) |= NX_FDM_INTERMEDIATE;
NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION;
@@ -105,41 +94,17 @@ static int nx_sha256_update(struct shash_desc *desc, const u8 *data,
}
do {
- int used_sgs = 0;
struct nx_sg *in_sg = nx_ctx->in_sg;
- if (buf_len) {
- data_len = buf_len;
- in_sg = nx_build_sg_list(in_sg,
- (u8 *) sctx->buf,
- &data_len,
- max_sg_len);
-
- if (data_len != buf_len) {
- rc = -EINVAL;
- goto out;
- }
- used_sgs = in_sg - nx_ctx->in_sg;
- }
+ to_process = total & ~(SHA256_BLOCK_SIZE - 1);
- /* to_process: SHA256_BLOCK_SIZE aligned chunk to be
- * processed in this iteration. This value is restricted
- * by sg list limits and number of sgs we already used
- * for leftover data. (see above)
- * In ideal case, we could allow NX_PAGE_SIZE * max_sg_len,
- * but because data may not be aligned, we need to account
- * for that too. */
- to_process = min_t(u64, total,
- (max_sg_len - 1 - used_sgs) * NX_PAGE_SIZE);
- to_process = to_process & ~(SHA256_BLOCK_SIZE - 1);
-
- data_len = to_process - buf_len;
+ data_len = to_process;
in_sg = nx_build_sg_list(in_sg, (u8 *) data,
&data_len, max_sg_len);
nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) * sizeof(struct nx_sg);
- to_process = data_len + buf_len;
+ to_process = data_len;
leftover = total - to_process;
/*
@@ -162,26 +127,22 @@ static int nx_sha256_update(struct shash_desc *desc, const u8 *data,
atomic_inc(&(nx_ctx->stats->sha256_ops));
total -= to_process;
- data += to_process - buf_len;
- buf_len = 0;
-
+ data += to_process;
+ sctx->count += to_process;
} while (leftover >= SHA256_BLOCK_SIZE);
- /* copy the leftover back into the state struct */
- if (leftover)
- memcpy(sctx->buf, data, leftover);
-
- sctx->count += len;
+ rc = leftover;
memcpy(sctx->state, csbcpb->cpb.sha256.message_digest, SHA256_DIGEST_SIZE);
out:
spin_unlock_irqrestore(&nx_ctx->lock, irq_flags);
return rc;
}
-static int nx_sha256_final(struct shash_desc *desc, u8 *out)
+static int nx_sha256_finup(struct shash_desc *desc, const u8 *src,
+ unsigned int nbytes, u8 *out)
{
+ struct nx_crypto_ctx *nx_ctx = crypto_shash_ctx(desc->tfm);
struct sha256_state_be *sctx = shash_desc_ctx(desc);
- struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
struct nx_csbcpb *csbcpb = (struct nx_csbcpb *)nx_ctx->csbcpb;
struct nx_sg *in_sg, *out_sg;
unsigned long irq_flags;
@@ -197,25 +158,19 @@ static int nx_sha256_final(struct shash_desc *desc, u8 *out)
nx_ctx->ap->databytelen/NX_PAGE_SIZE);
/* final is represented by continuing the operation and indicating that
- * this is not an intermediate operation */
- if (sctx->count >= SHA256_BLOCK_SIZE) {
- /* we've hit the nx chip previously, now we're finalizing,
- * so copy over the partial digest */
- memcpy(csbcpb->cpb.sha256.input_partial_digest, sctx->state, SHA256_DIGEST_SIZE);
- NX_CPB_FDM(csbcpb) &= ~NX_FDM_INTERMEDIATE;
- NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION;
- } else {
- NX_CPB_FDM(csbcpb) &= ~NX_FDM_INTERMEDIATE;
- NX_CPB_FDM(csbcpb) &= ~NX_FDM_CONTINUATION;
- }
+ * this is not an intermediate operation
+ * copy over the partial digest */
+ memcpy(csbcpb->cpb.sha256.input_partial_digest, sctx->state, SHA256_DIGEST_SIZE);
+ NX_CPB_FDM(csbcpb) &= ~NX_FDM_INTERMEDIATE;
+ NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION;
+ sctx->count += nbytes;
csbcpb->cpb.sha256.message_bit_length = (u64) (sctx->count * 8);
- len = sctx->count & (SHA256_BLOCK_SIZE - 1);
- in_sg = nx_build_sg_list(nx_ctx->in_sg, (u8 *) sctx->buf,
- &len, max_sg_len);
+ len = nbytes;
+ in_sg = nx_build_sg_list(nx_ctx->in_sg, (u8 *)src, &len, max_sg_len);
- if (len != (sctx->count & (SHA256_BLOCK_SIZE - 1))) {
+ if (len != nbytes) {
rc = -EINVAL;
goto out;
}
@@ -251,18 +206,34 @@ out:
static int nx_sha256_export(struct shash_desc *desc, void *out)
{
struct sha256_state_be *sctx = shash_desc_ctx(desc);
+ union {
+ u8 *u8;
+ u32 *u32;
+ u64 *u64;
+ } p = { .u8 = out };
+ int i;
- memcpy(out, sctx, sizeof(*sctx));
+ for (i = 0; i < SHA256_DIGEST_SIZE / sizeof(*p.u32); i++)
+ put_unaligned(be32_to_cpu(sctx->state[i]), p.u32++);
+ put_unaligned(sctx->count, p.u64++);
return 0;
}
static int nx_sha256_import(struct shash_desc *desc, const void *in)
{
struct sha256_state_be *sctx = shash_desc_ctx(desc);
+ union {
+ const u8 *u8;
+ const u32 *u32;
+ const u64 *u64;
+ } p = { .u8 = in };
+ int i;
- memcpy(sctx, in, sizeof(*sctx));
+ for (i = 0; i < SHA256_DIGEST_SIZE / sizeof(*p.u32); i++)
+ sctx->state[i] = cpu_to_be32(get_unaligned(p.u32++));
+ sctx->count = get_unaligned(p.u64++);
return 0;
}
@@ -270,19 +241,20 @@ struct shash_alg nx_shash_sha256_alg = {
.digestsize = SHA256_DIGEST_SIZE,
.init = nx_sha256_init,
.update = nx_sha256_update,
- .final = nx_sha256_final,
+ .finup = nx_sha256_finup,
.export = nx_sha256_export,
.import = nx_sha256_import,
+ .init_tfm = nx_crypto_ctx_sha256_init,
+ .exit_tfm = nx_crypto_ctx_shash_exit,
.descsize = sizeof(struct sha256_state_be),
.statesize = sizeof(struct sha256_state_be),
.base = {
.cra_name = "sha256",
.cra_driver_name = "sha256-nx",
.cra_priority = 300,
+ .cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY,
.cra_blocksize = SHA256_BLOCK_SIZE,
.cra_module = THIS_MODULE,
.cra_ctxsize = sizeof(struct nx_crypto_ctx),
- .cra_init = nx_crypto_ctx_sha256_init,
- .cra_exit = nx_crypto_ctx_exit,
}
};
generated by cgit (git 2.34.1) at 2025-05-28 23:31:21 +0000