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-rw-r--r--drivers/crypto/padlock-sha.c269
1 files changed, 264 insertions, 5 deletions
diff --git a/drivers/crypto/padlock-sha.c b/drivers/crypto/padlock-sha.c
index adf075b6b9a8..06bdb4b2c6a6 100644
--- a/drivers/crypto/padlock-sha.c
+++ b/drivers/crypto/padlock-sha.c
@@ -288,9 +288,250 @@ static struct shash_alg sha256_alg = {
}
};
+/* Add two shash_alg instance for hardware-implemented *
+* multiple-parts hash supported by VIA Nano Processor.*/
+static int padlock_sha1_init_nano(struct shash_desc *desc)
+{
+ struct sha1_state *sctx = shash_desc_ctx(desc);
+
+ *sctx = (struct sha1_state){
+ .state = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 },
+ };
+
+ return 0;
+}
+
+static int padlock_sha1_update_nano(struct shash_desc *desc,
+ const u8 *data, unsigned int len)
+{
+ struct sha1_state *sctx = shash_desc_ctx(desc);
+ unsigned int partial, done;
+ const u8 *src;
+ /*The PHE require the out buffer must 128 bytes and 16-bytes aligned*/
+ u8 buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__
+ ((aligned(STACK_ALIGN)));
+ u8 *dst = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT);
+ int ts_state;
+
+ partial = sctx->count & 0x3f;
+ sctx->count += len;
+ done = 0;
+ src = data;
+ memcpy(dst, (u8 *)(sctx->state), SHA1_DIGEST_SIZE);
+
+ if ((partial + len) >= SHA1_BLOCK_SIZE) {
+
+ /* Append the bytes in state's buffer to a block to handle */
+ if (partial) {
+ done = -partial;
+ memcpy(sctx->buffer + partial, data,
+ done + SHA1_BLOCK_SIZE);
+ src = sctx->buffer;
+ ts_state = irq_ts_save();
+ asm volatile (".byte 0xf3,0x0f,0xa6,0xc8"
+ : "+S"(src), "+D"(dst) \
+ : "a"((long)-1), "c"((unsigned long)1));
+ irq_ts_restore(ts_state);
+ done += SHA1_BLOCK_SIZE;
+ src = data + done;
+ }
+
+ /* Process the left bytes from the input data */
+ if (len - done >= SHA1_BLOCK_SIZE) {
+ ts_state = irq_ts_save();
+ asm volatile (".byte 0xf3,0x0f,0xa6,0xc8"
+ : "+S"(src), "+D"(dst)
+ : "a"((long)-1),
+ "c"((unsigned long)((len - done) / SHA1_BLOCK_SIZE)));
+ irq_ts_restore(ts_state);
+ done += ((len - done) - (len - done) % SHA1_BLOCK_SIZE);
+ src = data + done;
+ }
+ partial = 0;
+ }
+ memcpy((u8 *)(sctx->state), dst, SHA1_DIGEST_SIZE);
+ memcpy(sctx->buffer + partial, src, len - done);
+
+ return 0;
+}
+
+static int padlock_sha1_final_nano(struct shash_desc *desc, u8 *out)
+{
+ struct sha1_state *state = (struct sha1_state *)shash_desc_ctx(desc);
+ unsigned int partial, padlen;
+ __be64 bits;
+ static const u8 padding[64] = { 0x80, };
+
+ bits = cpu_to_be64(state->count << 3);
+
+ /* Pad out to 56 mod 64 */
+ partial = state->count & 0x3f;
+ padlen = (partial < 56) ? (56 - partial) : ((64+56) - partial);
+ padlock_sha1_update_nano(desc, padding, padlen);
+
+ /* Append length field bytes */
+ padlock_sha1_update_nano(desc, (const u8 *)&bits, sizeof(bits));
+
+ /* Swap to output */
+ padlock_output_block((uint32_t *)(state->state), (uint32_t *)out, 5);
+
+ return 0;
+}
+
+static int padlock_sha256_init_nano(struct shash_desc *desc)
+{
+ struct sha256_state *sctx = shash_desc_ctx(desc);
+
+ *sctx = (struct sha256_state){
+ .state = { SHA256_H0, SHA256_H1, SHA256_H2, SHA256_H3, \
+ SHA256_H4, SHA256_H5, SHA256_H6, SHA256_H7},
+ };
+
+ return 0;
+}
+
+static int padlock_sha256_update_nano(struct shash_desc *desc, const u8 *data,
+ unsigned int len)
+{
+ struct sha256_state *sctx = shash_desc_ctx(desc);
+ unsigned int partial, done;
+ const u8 *src;
+ /*The PHE require the out buffer must 128 bytes and 16-bytes aligned*/
+ u8 buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__
+ ((aligned(STACK_ALIGN)));
+ u8 *dst = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT);
+ int ts_state;
+
+ partial = sctx->count & 0x3f;
+ sctx->count += len;
+ done = 0;
+ src = data;
+ memcpy(dst, (u8 *)(sctx->state), SHA256_DIGEST_SIZE);
+
+ if ((partial + len) >= SHA256_BLOCK_SIZE) {
+
+ /* Append the bytes in state's buffer to a block to handle */
+ if (partial) {
+ done = -partial;
+ memcpy(sctx->buf + partial, data,
+ done + SHA256_BLOCK_SIZE);
+ src = sctx->buf;
+ ts_state = irq_ts_save();
+ asm volatile (".byte 0xf3,0x0f,0xa6,0xd0"
+ : "+S"(src), "+D"(dst)
+ : "a"((long)-1), "c"((unsigned long)1));
+ irq_ts_restore(ts_state);
+ done += SHA256_BLOCK_SIZE;
+ src = data + done;
+ }
+
+ /* Process the left bytes from input data*/
+ if (len - done >= SHA256_BLOCK_SIZE) {
+ ts_state = irq_ts_save();
+ asm volatile (".byte 0xf3,0x0f,0xa6,0xd0"
+ : "+S"(src), "+D"(dst)
+ : "a"((long)-1),
+ "c"((unsigned long)((len - done) / 64)));
+ irq_ts_restore(ts_state);
+ done += ((len - done) - (len - done) % 64);
+ src = data + done;
+ }
+ partial = 0;
+ }
+ memcpy((u8 *)(sctx->state), dst, SHA256_DIGEST_SIZE);
+ memcpy(sctx->buf + partial, src, len - done);
+
+ return 0;
+}
+
+static int padlock_sha256_final_nano(struct shash_desc *desc, u8 *out)
+{
+ struct sha256_state *state =
+ (struct sha256_state *)shash_desc_ctx(desc);
+ unsigned int partial, padlen;
+ __be64 bits;
+ static const u8 padding[64] = { 0x80, };
+
+ bits = cpu_to_be64(state->count << 3);
+
+ /* Pad out to 56 mod 64 */
+ partial = state->count & 0x3f;
+ padlen = (partial < 56) ? (56 - partial) : ((64+56) - partial);
+ padlock_sha256_update_nano(desc, padding, padlen);
+
+ /* Append length field bytes */
+ padlock_sha256_update_nano(desc, (const u8 *)&bits, sizeof(bits));
+
+ /* Swap to output */
+ padlock_output_block((uint32_t *)(state->state), (uint32_t *)out, 8);
+
+ return 0;
+}
+
+static int padlock_sha_export_nano(struct shash_desc *desc,
+ void *out)
+{
+ int statesize = crypto_shash_statesize(desc->tfm);
+ void *sctx = shash_desc_ctx(desc);
+
+ memcpy(out, sctx, statesize);
+ return 0;
+}
+
+static int padlock_sha_import_nano(struct shash_desc *desc,
+ const void *in)
+{
+ int statesize = crypto_shash_statesize(desc->tfm);
+ void *sctx = shash_desc_ctx(desc);
+
+ memcpy(sctx, in, statesize);
+ return 0;
+}
+
+static struct shash_alg sha1_alg_nano = {
+ .digestsize = SHA1_DIGEST_SIZE,
+ .init = padlock_sha1_init_nano,
+ .update = padlock_sha1_update_nano,
+ .final = padlock_sha1_final_nano,
+ .export = padlock_sha_export_nano,
+ .import = padlock_sha_import_nano,
+ .descsize = sizeof(struct sha1_state),
+ .statesize = sizeof(struct sha1_state),
+ .base = {
+ .cra_name = "sha1",
+ .cra_driver_name = "sha1-padlock-nano",
+ .cra_priority = PADLOCK_CRA_PRIORITY,
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SHA1_BLOCK_SIZE,
+ .cra_module = THIS_MODULE,
+ }
+};
+
+static struct shash_alg sha256_alg_nano = {
+ .digestsize = SHA256_DIGEST_SIZE,
+ .init = padlock_sha256_init_nano,
+ .update = padlock_sha256_update_nano,
+ .final = padlock_sha256_final_nano,
+ .export = padlock_sha_export_nano,
+ .import = padlock_sha_import_nano,
+ .descsize = sizeof(struct sha256_state),
+ .statesize = sizeof(struct sha256_state),
+ .base = {
+ .cra_name = "sha256",
+ .cra_driver_name = "sha256-padlock-nano",
+ .cra_priority = PADLOCK_CRA_PRIORITY,
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SHA256_BLOCK_SIZE,
+ .cra_module = THIS_MODULE,
+ }
+};
+
static int __init padlock_init(void)
{
int rc = -ENODEV;
+ struct cpuinfo_x86 *c = &cpu_data(0);
+ struct shash_alg *sha1;
+ struct shash_alg *sha256;
if (!cpu_has_phe) {
printk(KERN_NOTICE PFX "VIA PadLock Hash Engine not detected.\n");
@@ -302,11 +543,21 @@ static int __init padlock_init(void)
return -ENODEV;
}
- rc = crypto_register_shash(&sha1_alg);
+ /* Register the newly added algorithm module if on *
+ * VIA Nano processor, or else just do as before */
+ if (c->x86_model < 0x0f) {
+ sha1 = &sha1_alg;
+ sha256 = &sha256_alg;
+ } else {
+ sha1 = &sha1_alg_nano;
+ sha256 = &sha256_alg_nano;
+ }
+
+ rc = crypto_register_shash(sha1);
if (rc)
goto out;
- rc = crypto_register_shash(&sha256_alg);
+ rc = crypto_register_shash(sha256);
if (rc)
goto out_unreg1;
@@ -315,7 +566,8 @@ static int __init padlock_init(void)
return 0;
out_unreg1:
- crypto_unregister_shash(&sha1_alg);
+ crypto_unregister_shash(sha1);
+
out:
printk(KERN_ERR PFX "VIA PadLock SHA1/SHA256 initialization failed.\n");
return rc;
@@ -323,8 +575,15 @@ out:
static void __exit padlock_fini(void)
{
- crypto_unregister_shash(&sha1_alg);
- crypto_unregister_shash(&sha256_alg);
+ struct cpuinfo_x86 *c = &cpu_data(0);
+
+ if (c->x86_model >= 0x0f) {
+ crypto_unregister_shash(&sha1_alg_nano);
+ crypto_unregister_shash(&sha256_alg_nano);
+ } else {
+ crypto_unregister_shash(&sha1_alg);
+ crypto_unregister_shash(&sha256_alg);
+ }
}
module_init(padlock_init);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-15 20:48:55 +0000