Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next

Pull sparc updates from David Miller:
 "Largely this is simply adding support for the Niagara 4 cpu.

  Major areas are perf events (chip now supports 4 counters and can
  monitor any event on each counter), crypto (opcodes are availble for
  sha1, sha256, sha512, md5, crc32c, AES, DES, CAMELLIA, and Kasumi
  although the last is unsupported since we lack a generic crypto layer
  Kasumi implementation), and an optimized memcpy.

  Finally some cleanups by Peter Senna Tschudin."

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next: (47 commits)
  sparc64: Fix trailing whitespace in NG4 memcpy.
  sparc64: Fix comment type in NG4 copy from user.
  sparc64: Add SPARC-T4 optimized memcpy.
  drivers/sbus/char: removes unnecessary semicolon
  arch/sparc/kernel/pci_sun4v.c: removes unnecessary semicolon
  sparc64: Fix function argument comment in camellia_sparc64_key_expand asm.
  sparc64: Fix IV handling bug in des_sparc64_cbc_decrypt
  sparc64: Add auto-loading mechanism to crypto-opcode drivers.
  sparc64: Add missing pr_fmt define to crypto opcode drivers.
  sparc64: Adjust crypto priorities.
  sparc64: Use cpu_pgsz_mask for linear kernel mapping config.
  sparc64: Probe cpu page size support more portably.
  sparc64: Support 2GB and 16GB page sizes for kernel linear mappings.
  sparc64: Fix bugs in unrolled 256-bit loops.
  sparc64: Avoid code duplication in crypto assembler.
  sparc64: Unroll CTR crypt loops in AES driver.
  sparc64: Unroll ECB decryption loops in AES driver.
  sparc64: Unroll ECB encryption loops in AES driver.
  sparc64: Add ctr mode support to AES driver.
  sparc64: Move AES driver over to a methods based implementation.
  ...

1 files changed, 529 insertions, 0 deletions

diff --git a/arch/sparc/crypto/des_glue.c b/arch/sparc/crypto/des_glue.c
new file mode 100644
index 00000000000..c4940c2d307
--- /dev/null
+++ b/arch/sparc/crypto/des_glue.c
@@ -0,0 +1,529 @@
+/* Glue code for DES encryption optimized for sparc64 crypto opcodes.
+ *
+ * Copyright (C) 2012 David S. Miller <davem@davemloft.net>
+ */
+
+#define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt
+
+#include <linux/crypto.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/types.h>
+#include <crypto/algapi.h>
+#include <crypto/des.h>
+
+#include <asm/fpumacro.h>
+#include <asm/pstate.h>
+#include <asm/elf.h>
+
+#include "opcodes.h"
+
+struct des_sparc64_ctx {
+	u64 encrypt_expkey[DES_EXPKEY_WORDS / 2];
+	u64 decrypt_expkey[DES_EXPKEY_WORDS / 2];
+};
+
+struct des3_ede_sparc64_ctx {
+	u64 encrypt_expkey[DES3_EDE_EXPKEY_WORDS / 2];
+	u64 decrypt_expkey[DES3_EDE_EXPKEY_WORDS / 2];
+};
+
+static void encrypt_to_decrypt(u64 *d, const u64 *e)
+{
+	const u64 *s = e + (DES_EXPKEY_WORDS / 2) - 1;
+	int i;
+
+	for (i = 0; i < DES_EXPKEY_WORDS / 2; i++)
+		*d++ = *s--;
+}
+
+extern void des_sparc64_key_expand(const u32 *input_key, u64 *key);
+
+static int des_set_key(struct crypto_tfm *tfm, const u8 *key,
+		       unsigned int keylen)
+{
+	struct des_sparc64_ctx *dctx = crypto_tfm_ctx(tfm);
+	u32 *flags = &tfm->crt_flags;
+	u32 tmp[DES_EXPKEY_WORDS];
+	int ret;
+
+	/* Even though we have special instructions for key expansion,
+	 * we call des_ekey() so that we don't have to write our own
+	 * weak key detection code.
+	 */
+	ret = des_ekey(tmp, key);
+	if (unlikely(ret == 0) && (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
+		*flags |= CRYPTO_TFM_RES_WEAK_KEY;
+		return -EINVAL;
+	}
+
+	des_sparc64_key_expand((const u32 *) key, &dctx->encrypt_expkey[0]);
+	encrypt_to_decrypt(&dctx->decrypt_expkey[0], &dctx->encrypt_expkey[0]);
+
+	return 0;
+}
+
+extern void des_sparc64_crypt(const u64 *key, const u64 *input,
+			      u64 *output);
+
+static void des_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+	struct des_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
+	const u64 *K = ctx->encrypt_expkey;
+
+	des_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
+}
+
+static void des_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+	struct des_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
+	const u64 *K = ctx->decrypt_expkey;
+
+	des_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
+}
+
+extern void des_sparc64_load_keys(const u64 *key);
+
+extern void des_sparc64_ecb_crypt(const u64 *input, u64 *output,
+				  unsigned int len);
+
+#define DES_BLOCK_MASK	(~(DES_BLOCK_SIZE - 1))
+
+static int __ecb_crypt(struct blkcipher_desc *desc,
+		       struct scatterlist *dst, struct scatterlist *src,
+		       unsigned int nbytes, bool encrypt)
+{
+	struct des_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+	struct blkcipher_walk walk;
+	int err;
+
+	blkcipher_walk_init(&walk, dst, src, nbytes);
+	err = blkcipher_walk_virt(desc, &walk);
+
+	if (encrypt)
+		des_sparc64_load_keys(&ctx->encrypt_expkey[0]);
+	else
+		des_sparc64_load_keys(&ctx->decrypt_expkey[0]);
+	while ((nbytes = walk.nbytes)) {
+		unsigned int block_len = nbytes & DES_BLOCK_MASK;
+
+		if (likely(block_len)) {
+			des_sparc64_ecb_crypt((const u64 *)walk.src.virt.addr,
+					      (u64 *) walk.dst.virt.addr,
+					      block_len);
+		}
+		nbytes &= DES_BLOCK_SIZE - 1;
+		err = blkcipher_walk_done(desc, &walk, nbytes);
+	}
+	fprs_write(0);
+	return err;
+}
+
+static int ecb_encrypt(struct blkcipher_desc *desc,
+		       struct scatterlist *dst, struct scatterlist *src,
+		       unsigned int nbytes)
+{
+	return __ecb_crypt(desc, dst, src, nbytes, true);
+}
+
+static int ecb_decrypt(struct blkcipher_desc *desc,
+		       struct scatterlist *dst, struct scatterlist *src,
+		       unsigned int nbytes)
+{
+	return __ecb_crypt(desc, dst, src, nbytes, false);
+}
+
+extern void des_sparc64_cbc_encrypt(const u64 *input, u64 *output,
+				    unsigned int len, u64 *iv);
+
+static int cbc_encrypt(struct blkcipher_desc *desc,
+		       struct scatterlist *dst, struct scatterlist *src,
+		       unsigned int nbytes)
+{
+	struct des_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+	struct blkcipher_walk walk;
+	int err;
+
+	blkcipher_walk_init(&walk, dst, src, nbytes);
+	err = blkcipher_walk_virt(desc, &walk);
+
+	des_sparc64_load_keys(&ctx->encrypt_expkey[0]);
+	while ((nbytes = walk.nbytes)) {
+		unsigned int block_len = nbytes & DES_BLOCK_MASK;
+
+		if (likely(block_len)) {
+			des_sparc64_cbc_encrypt((const u64 *)walk.src.virt.addr,
+						(u64 *) walk.dst.virt.addr,
+						block_len, (u64 *) walk.iv);
+		}
+		nbytes &= DES_BLOCK_SIZE - 1;
+		err = blkcipher_walk_done(desc, &walk, nbytes);
+	}
+	fprs_write(0);
+	return err;
+}
+
+extern void des_sparc64_cbc_decrypt(const u64 *input, u64 *output,
+				    unsigned int len, u64 *iv);
+
+static int cbc_decrypt(struct blkcipher_desc *desc,
+		       struct scatterlist *dst, struct scatterlist *src,
+		       unsigned int nbytes)
+{
+	struct des_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+	struct blkcipher_walk walk;
+	int err;
+
+	blkcipher_walk_init(&walk, dst, src, nbytes);
+	err = blkcipher_walk_virt(desc, &walk);
+
+	des_sparc64_load_keys(&ctx->decrypt_expkey[0]);
+	while ((nbytes = walk.nbytes)) {
+		unsigned int block_len = nbytes & DES_BLOCK_MASK;
+
+		if (likely(block_len)) {
+			des_sparc64_cbc_decrypt((const u64 *)walk.src.virt.addr,
+						(u64 *) walk.dst.virt.addr,
+						block_len, (u64 *) walk.iv);
+		}
+		nbytes &= DES_BLOCK_SIZE - 1;
+		err = blkcipher_walk_done(desc, &walk, nbytes);
+	}
+	fprs_write(0);
+	return err;
+}
+
+static int des3_ede_set_key(struct crypto_tfm *tfm, const u8 *key,
+			    unsigned int keylen)
+{
+	struct des3_ede_sparc64_ctx *dctx = crypto_tfm_ctx(tfm);
+	const u32 *K = (const u32 *)key;
+	u32 *flags = &tfm->crt_flags;
+	u64 k1[DES_EXPKEY_WORDS / 2];
+	u64 k2[DES_EXPKEY_WORDS / 2];
+	u64 k3[DES_EXPKEY_WORDS / 2];
+
+	if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) ||
+		     !((K[2] ^ K[4]) | (K[3] ^ K[5]))) &&
+		     (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
+		*flags |= CRYPTO_TFM_RES_WEAK_KEY;
+		return -EINVAL;
+	}
+
+	des_sparc64_key_expand((const u32 *)key, k1);
+	key += DES_KEY_SIZE;
+	des_sparc64_key_expand((const u32 *)key, k2);
+	key += DES_KEY_SIZE;
+	des_sparc64_key_expand((const u32 *)key, k3);
+
+	memcpy(&dctx->encrypt_expkey[0], &k1[0], sizeof(k1));
+	encrypt_to_decrypt(&dctx->encrypt_expkey[DES_EXPKEY_WORDS / 2], &k2[0]);
+	memcpy(&dctx->encrypt_expkey[(DES_EXPKEY_WORDS / 2) * 2],
+	       &k3[0], sizeof(k3));
+
+	encrypt_to_decrypt(&dctx->decrypt_expkey[0], &k3[0]);
+	memcpy(&dctx->decrypt_expkey[DES_EXPKEY_WORDS / 2],
+	       &k2[0], sizeof(k2));
+	encrypt_to_decrypt(&dctx->decrypt_expkey[(DES_EXPKEY_WORDS / 2) * 2],
+			   &k1[0]);
+
+	return 0;
+}
+
+extern void des3_ede_sparc64_crypt(const u64 *key, const u64 *input,
+				   u64 *output);
+
+static void des3_ede_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+	struct des3_ede_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
+	const u64 *K = ctx->encrypt_expkey;
+
+	des3_ede_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
+}
+
+static void des3_ede_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+	struct des3_ede_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
+	const u64 *K = ctx->decrypt_expkey;
+
+	des3_ede_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
+}
+
+extern void des3_ede_sparc64_load_keys(const u64 *key);
+
+extern void des3_ede_sparc64_ecb_crypt(const u64 *expkey, const u64 *input,
+				       u64 *output, unsigned int len);
+
+static int __ecb3_crypt(struct blkcipher_desc *desc,
+			struct scatterlist *dst, struct scatterlist *src,
+			unsigned int nbytes, bool encrypt)
+{
+	struct des3_ede_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+	struct blkcipher_walk walk;
+	const u64 *K;
+	int err;
+
+	blkcipher_walk_init(&walk, dst, src, nbytes);
+	err = blkcipher_walk_virt(desc, &walk);
+
+	if (encrypt)
+		K = &ctx->encrypt_expkey[0];
+	else
+		K = &ctx->decrypt_expkey[0];
+	des3_ede_sparc64_load_keys(K);
+	while ((nbytes = walk.nbytes)) {
+		unsigned int block_len = nbytes & DES_BLOCK_MASK;
+
+		if (likely(block_len)) {
+			const u64 *src64 = (const u64 *)walk.src.virt.addr;
+			des3_ede_sparc64_ecb_crypt(K, src64,
+						   (u64 *) walk.dst.virt.addr,
+						   block_len);
+		}
+		nbytes &= DES_BLOCK_SIZE - 1;
+		err = blkcipher_walk_done(desc, &walk, nbytes);
+	}
+	fprs_write(0);
+	return err;
+}
+
+static int ecb3_encrypt(struct blkcipher_desc *desc,
+		       struct scatterlist *dst, struct scatterlist *src,
+		       unsigned int nbytes)
+{
+	return __ecb3_crypt(desc, dst, src, nbytes, true);
+}
+
+static int ecb3_decrypt(struct blkcipher_desc *desc,
+		       struct scatterlist *dst, struct scatterlist *src,
+		       unsigned int nbytes)
+{
+	return __ecb3_crypt(desc, dst, src, nbytes, false);
+}
+
+extern void des3_ede_sparc64_cbc_encrypt(const u64 *expkey, const u64 *input,
+					 u64 *output, unsigned int len,
+					 u64 *iv);
+
+static int cbc3_encrypt(struct blkcipher_desc *desc,
+			struct scatterlist *dst, struct scatterlist *src,
+			unsigned int nbytes)
+{
+	struct des3_ede_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+	struct blkcipher_walk walk;
+	const u64 *K;
+	int err;
+
+	blkcipher_walk_init(&walk, dst, src, nbytes);
+	err = blkcipher_walk_virt(desc, &walk);
+
+	K = &ctx->encrypt_expkey[0];
+	des3_ede_sparc64_load_keys(K);
+	while ((nbytes = walk.nbytes)) {
+		unsigned int block_len = nbytes & DES_BLOCK_MASK;
+
+		if (likely(block_len)) {
+			const u64 *src64 = (const u64 *)walk.src.virt.addr;
+			des3_ede_sparc64_cbc_encrypt(K, src64,
+						     (u64 *) walk.dst.virt.addr,
+						     block_len,
+						     (u64 *) walk.iv);
+		}
+		nbytes &= DES_BLOCK_SIZE - 1;
+		err = blkcipher_walk_done(desc, &walk, nbytes);
+	}
+	fprs_write(0);
+	return err;
+}
+
+extern void des3_ede_sparc64_cbc_decrypt(const u64 *expkey, const u64 *input,
+					 u64 *output, unsigned int len,
+					 u64 *iv);
+
+static int cbc3_decrypt(struct blkcipher_desc *desc,
+			struct scatterlist *dst, struct scatterlist *src,
+			unsigned int nbytes)
+{
+	struct des3_ede_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+	struct blkcipher_walk walk;
+	const u64 *K;
+	int err;
+
+	blkcipher_walk_init(&walk, dst, src, nbytes);
+	err = blkcipher_walk_virt(desc, &walk);
+
+	K = &ctx->decrypt_expkey[0];
+	des3_ede_sparc64_load_keys(K);
+	while ((nbytes = walk.nbytes)) {
+		unsigned int block_len = nbytes & DES_BLOCK_MASK;
+
+		if (likely(block_len)) {
+			const u64 *src64 = (const u64 *)walk.src.virt.addr;
+			des3_ede_sparc64_cbc_decrypt(K, src64,
+						     (u64 *) walk.dst.virt.addr,
+						     block_len,
+						     (u64 *) walk.iv);
+		}
+		nbytes &= DES_BLOCK_SIZE - 1;
+		err = blkcipher_walk_done(desc, &walk, nbytes);
+	}
+	fprs_write(0);
+	return err;
+}
+
+static struct crypto_alg algs[] = { {
+	.cra_name		= "des",
+	.cra_driver_name	= "des-sparc64",
+	.cra_priority		= SPARC_CR_OPCODE_PRIORITY,
+	.cra_flags		= CRYPTO_ALG_TYPE_CIPHER,
+	.cra_blocksize		= DES_BLOCK_SIZE,
+	.cra_ctxsize		= sizeof(struct des_sparc64_ctx),
+	.cra_alignmask		= 7,
+	.cra_module		= THIS_MODULE,
+	.cra_u	= {
+		.cipher	= {
+			.cia_min_keysize	= DES_KEY_SIZE,
+			.cia_max_keysize	= DES_KEY_SIZE,
+			.cia_setkey		= des_set_key,
+			.cia_encrypt		= des_encrypt,
+			.cia_decrypt		= des_decrypt
+		}
+	}
+}, {
+	.cra_name		= "ecb(des)",
+	.cra_driver_name	= "ecb-des-sparc64",
+	.cra_priority		= SPARC_CR_OPCODE_PRIORITY,
+	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER,
+	.cra_blocksize		= DES_BLOCK_SIZE,
+	.cra_ctxsize		= sizeof(struct des_sparc64_ctx),
+	.cra_alignmask		= 7,
+	.cra_type		= &crypto_blkcipher_type,
+	.cra_module		= THIS_MODULE,
+	.cra_u = {
+		.blkcipher = {
+			.min_keysize	= DES_KEY_SIZE,
+			.max_keysize	= DES_KEY_SIZE,
+			.setkey		= des_set_key,
+			.encrypt	= ecb_encrypt,
+			.decrypt	= ecb_decrypt,
+		},
+	},
+}, {
+	.cra_name		= "cbc(des)",
+	.cra_driver_name	= "cbc-des-sparc64",
+	.cra_priority		= SPARC_CR_OPCODE_PRIORITY,
+	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER,
+	.cra_blocksize		= DES_BLOCK_SIZE,
+	.cra_ctxsize		= sizeof(struct des_sparc64_ctx),
+	.cra_alignmask		= 7,
+	.cra_type		= &crypto_blkcipher_type,
+	.cra_module		= THIS_MODULE,
+	.cra_u = {
+		.blkcipher = {
+			.min_keysize	= DES_KEY_SIZE,
+			.max_keysize	= DES_KEY_SIZE,
+			.setkey		= des_set_key,
+			.encrypt	= cbc_encrypt,
+			.decrypt	= cbc_decrypt,
+		},
+	},
+}, {
+	.cra_name		= "des3_ede",
+	.cra_driver_name	= "des3_ede-sparc64",
+	.cra_priority		= SPARC_CR_OPCODE_PRIORITY,
+	.cra_flags		= CRYPTO_ALG_TYPE_CIPHER,
+	.cra_blocksize		= DES3_EDE_BLOCK_SIZE,
+	.cra_ctxsize		= sizeof(struct des3_ede_sparc64_ctx),
+	.cra_alignmask		= 7,
+	.cra_module		= THIS_MODULE,
+	.cra_u	= {
+		.cipher	= {
+			.cia_min_keysize	= DES3_EDE_KEY_SIZE,
+			.cia_max_keysize	= DES3_EDE_KEY_SIZE,
+			.cia_setkey		= des3_ede_set_key,
+			.cia_encrypt		= des3_ede_encrypt,
+			.cia_decrypt		= des3_ede_decrypt
+		}
+	}
+}, {
+	.cra_name		= "ecb(des3_ede)",
+	.cra_driver_name	= "ecb-des3_ede-sparc64",
+	.cra_priority		= SPARC_CR_OPCODE_PRIORITY,
+	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER,
+	.cra_blocksize		= DES3_EDE_BLOCK_SIZE,
+	.cra_ctxsize		= sizeof(struct des3_ede_sparc64_ctx),
+	.cra_alignmask		= 7,
+	.cra_type		= &crypto_blkcipher_type,
+	.cra_module		= THIS_MODULE,
+	.cra_u = {
+		.blkcipher = {
+			.min_keysize	= DES3_EDE_KEY_SIZE,
+			.max_keysize	= DES3_EDE_KEY_SIZE,
+			.setkey		= des3_ede_set_key,
+			.encrypt	= ecb3_encrypt,
+			.decrypt	= ecb3_decrypt,
+		},
+	},
+}, {
+	.cra_name		= "cbc(des3_ede)",
+	.cra_driver_name	= "cbc-des3_ede-sparc64",
+	.cra_priority		= SPARC_CR_OPCODE_PRIORITY,
+	.cra_flags		= CRYPTO_ALG_TYPE_BLKCIPHER,
+	.cra_blocksize		= DES3_EDE_BLOCK_SIZE,
+	.cra_ctxsize		= sizeof(struct des3_ede_sparc64_ctx),
+	.cra_alignmask		= 7,
+	.cra_type		= &crypto_blkcipher_type,
+	.cra_module		= THIS_MODULE,
+	.cra_u = {
+		.blkcipher = {
+			.min_keysize	= DES3_EDE_KEY_SIZE,
+			.max_keysize	= DES3_EDE_KEY_SIZE,
+			.setkey		= des3_ede_set_key,
+			.encrypt	= cbc3_encrypt,
+			.decrypt	= cbc3_decrypt,
+		},
+	},
+} };
+
+static bool __init sparc64_has_des_opcode(void)
+{
+	unsigned long cfr;
+
+	if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
+		return false;
+
+	__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
+	if (!(cfr & CFR_DES))
+		return false;
+
+	return true;
+}
+
+static int __init des_sparc64_mod_init(void)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(algs); i++)
+		INIT_LIST_HEAD(&algs[i].cra_list);
+
+	if (sparc64_has_des_opcode()) {
+		pr_info("Using sparc64 des opcodes optimized DES implementation\n");
+		return crypto_register_algs(algs, ARRAY_SIZE(algs));
+	}
+	pr_info("sparc64 des opcodes not available.\n");
+	return -ENODEV;
+}
+
+static void __exit des_sparc64_mod_fini(void)
+{
+	crypto_unregister_algs(algs, ARRAY_SIZE(algs));
+}
+
+module_init(des_sparc64_mod_init);
+module_exit(des_sparc64_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms, sparc64 des opcode accelerated");
+
+MODULE_ALIAS("des");