+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/* Glue code for CRC32C optimized for sparc64 crypto opcodes.
- *
- * This is based largely upon arch/x86/crypto/crc32c-intel.c
- *
- * Copyright (C) 2008 Intel Corporation
- * Authors: Austin Zhang <austin_zhang@linux.intel.com>
- * Kent Liu <kent.liu@intel.com>
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/crc32.h>
-
-#include <crypto/internal/hash.h>
-
-#include <asm/pstate.h>
-#include <asm/elf.h>
-#include <linux/unaligned.h>
-
-#include "opcodes.h"
-
-/*
- * Setting the seed allows arbitrary accumulators and flexible XOR policy
- * If your algorithm starts with ~0, then XOR with ~0 before you set
- * the seed.
- */
-static int crc32c_sparc64_setkey(struct crypto_shash *hash, const u8 *key,
- unsigned int keylen)
-{
- u32 *mctx = crypto_shash_ctx(hash);
-
- if (keylen != sizeof(u32))
- return -EINVAL;
- *mctx = get_unaligned_le32(key);
- return 0;
-}
-
-static int crc32c_sparc64_init(struct shash_desc *desc)
-{
- u32 *mctx = crypto_shash_ctx(desc->tfm);
- u32 *crcp = shash_desc_ctx(desc);
-
- *crcp = *mctx;
-
- return 0;
-}
-
-extern void crc32c_sparc64(u32 *crcp, const u64 *data, unsigned int len);
-
-static u32 crc32c_compute(u32 crc, const u8 *data, unsigned int len)
-{
- unsigned int n = -(uintptr_t)data & 7;
-
- if (n) {
- /* Data isn't 8-byte aligned. Align it. */
- n = min(n, len);
- crc = __crc32c_le(crc, data, n);
- data += n;
- len -= n;
- }
- n = len & ~7U;
- if (n) {
- crc32c_sparc64(&crc, (const u64 *)data, n);
- data += n;
- len -= n;
- }
- if (len)
- crc = __crc32c_le(crc, data, len);
- return crc;
-}
-
-static int crc32c_sparc64_update(struct shash_desc *desc, const u8 *data,
- unsigned int len)
-{
- u32 *crcp = shash_desc_ctx(desc);
-
- *crcp = crc32c_compute(*crcp, data, len);
- return 0;
-}
-
-static int __crc32c_sparc64_finup(const u32 *crcp, const u8 *data,
- unsigned int len, u8 *out)
-{
- put_unaligned_le32(~crc32c_compute(*crcp, data, len), out);
- return 0;
-}
-
-static int crc32c_sparc64_finup(struct shash_desc *desc, const u8 *data,
- unsigned int len, u8 *out)
-{
- return __crc32c_sparc64_finup(shash_desc_ctx(desc), data, len, out);
-}
-
-static int crc32c_sparc64_final(struct shash_desc *desc, u8 *out)
-{
- u32 *crcp = shash_desc_ctx(desc);
-
- put_unaligned_le32(~*crcp, out);
- return 0;
-}
-
-static int crc32c_sparc64_digest(struct shash_desc *desc, const u8 *data,
- unsigned int len, u8 *out)
-{
- return __crc32c_sparc64_finup(crypto_shash_ctx(desc->tfm), data, len,
- out);
-}
-
-static int crc32c_sparc64_cra_init(struct crypto_tfm *tfm)
-{
- u32 *key = crypto_tfm_ctx(tfm);
-
- *key = ~0;
-
- return 0;
-}
-
-#define CHKSUM_BLOCK_SIZE 1
-#define CHKSUM_DIGEST_SIZE 4
-
-static struct shash_alg alg = {
- .setkey = crc32c_sparc64_setkey,
- .init = crc32c_sparc64_init,
- .update = crc32c_sparc64_update,
- .final = crc32c_sparc64_final,
- .finup = crc32c_sparc64_finup,
- .digest = crc32c_sparc64_digest,
- .descsize = sizeof(u32),
- .digestsize = CHKSUM_DIGEST_SIZE,
- .base = {
- .cra_name = "crc32c",
- .cra_driver_name = "crc32c-sparc64",
- .cra_priority = SPARC_CR_OPCODE_PRIORITY,
- .cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
- .cra_blocksize = CHKSUM_BLOCK_SIZE,
- .cra_ctxsize = sizeof(u32),
- .cra_module = THIS_MODULE,
- .cra_init = crc32c_sparc64_cra_init,
- }
-};
-
-static bool __init sparc64_has_crc32c_opcode(void)
-{
- unsigned long cfr;
-
- if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
- return false;
-
- __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
- if (!(cfr & CFR_CRC32C))
- return false;
-
- return true;
-}
-
-static int __init crc32c_sparc64_mod_init(void)
-{
- if (sparc64_has_crc32c_opcode()) {
- pr_info("Using sparc64 crc32c opcode optimized CRC32C implementation\n");
- return crypto_register_shash(&alg);
- }
- pr_info("sparc64 crc32c opcode not available.\n");
- return -ENODEV;
-}
-
-static void __exit crc32c_sparc64_mod_fini(void)
-{
- crypto_unregister_shash(&alg);
-}
-
-module_init(crc32c_sparc64_mod_init);
-module_exit(crc32c_sparc64_mod_fini);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("CRC32c (Castagnoli), sparc64 crc32c opcode accelerated");
-
-MODULE_ALIAS_CRYPTO("crc32c");
-
-#include "crop_devid.c"
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+/* Glue code for CRC32C optimized for sparc64 crypto opcodes.
+ *
+ * This is based largely upon arch/x86/crypto/crc32c-intel.c
+ *
+ * Copyright (C) 2008 Intel Corporation
+ * Authors: Austin Zhang <austin_zhang@linux.intel.com>
+ * Kent Liu <kent.liu@intel.com>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/crc32.h>
+#include <asm/pstate.h>
+#include <asm/elf.h>
+
+static DEFINE_STATIC_KEY_FALSE(have_crc32c_opcode);
+
+u32 crc32_le_arch(u32 crc, const u8 *data, size_t len)
+{
+ return crc32_le_base(crc, data, len);
+}
+EXPORT_SYMBOL(crc32_le_arch);
+
+void crc32c_sparc64(u32 *crcp, const u64 *data, size_t len);
+
+u32 crc32c_le_arch(u32 crc, const u8 *data, size_t len)
+{
+ size_t n = -(uintptr_t)data & 7;
+
+ if (!static_branch_likely(&have_crc32c_opcode))
+ return crc32c_le_base(crc, data, len);
+
+ if (n) {
+ /* Data isn't 8-byte aligned. Align it. */
+ n = min(n, len);
+ crc = crc32c_le_base(crc, data, n);
+ data += n;
+ len -= n;
+ }
+ n = len & ~7U;
+ if (n) {
+ crc32c_sparc64(&crc, (const u64 *)data, n);
+ data += n;
+ len -= n;
+ }
+ if (len)
+ crc = crc32c_le_base(crc, data, len);
+ return crc;
+}
+EXPORT_SYMBOL(crc32c_le_arch);
+
+u32 crc32_be_arch(u32 crc, const u8 *data, size_t len)
+{
+ return crc32_be_base(crc, data, len);
+}
+EXPORT_SYMBOL(crc32_be_arch);
+
+static int __init crc32_sparc_init(void)
+{
+ unsigned long cfr;
+
+ if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
+ return 0;
+
+ __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
+ if (!(cfr & CFR_CRC32C))
+ return 0;
+
+ static_branch_enable(&have_crc32c_opcode);
+ pr_info("Using sparc64 crc32c opcode optimized CRC32C implementation\n");
+ return 0;
+}
+arch_initcall(crc32_sparc_init);
+
+static void __exit crc32_sparc_exit(void)
+{
+}
+module_exit(crc32_sparc_exit);
+
+u32 crc32_optimizations(void)
+{
+ if (static_key_enabled(&have_crc32c_opcode))
+ return CRC32C_OPTIMIZATION;
+ return 0;
+}
+EXPORT_SYMBOL(crc32_optimizations);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("CRC32c (Castagnoli), sparc64 crc32c opcode accelerated");
projects / nvme.git / commitdiff