^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* Glue code for CRC32C optimized for sparc64 crypto opcodes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * This is based largely upon arch/x86/crypto/crc32c-intel.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2008 Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Authors: Austin Zhang <austin_zhang@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Kent Liu <kent.liu@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/crc32.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <crypto/internal/hash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/pstate.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm/elf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include "opcodes.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * Setting the seed allows arbitrary accumulators and flexible XOR policy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * If your algorithm starts with ~0, then XOR with ~0 before you set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * the seed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static int crc32c_sparc64_setkey(struct crypto_shash *hash, const u8 *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) u32 *mctx = crypto_shash_ctx(hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) if (keylen != sizeof(u32))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) *(__le32 *)mctx = le32_to_cpup((__le32 *)key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static int crc32c_sparc64_init(struct shash_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) u32 *mctx = crypto_shash_ctx(desc->tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) u32 *crcp = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) *crcp = *mctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) extern void crc32c_sparc64(u32 *crcp, const u64 *data, unsigned int len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static void crc32c_compute(u32 *crcp, const u64 *data, unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) unsigned int asm_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) asm_len = len & ~7U;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (asm_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) crc32c_sparc64(crcp, data, asm_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) data += asm_len / 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) len -= asm_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) if (len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) *crcp = __crc32c_le(*crcp, (const unsigned char *) data, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static int crc32c_sparc64_update(struct shash_desc *desc, const u8 *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) u32 *crcp = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) crc32c_compute(crcp, (const u64 *) data, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static int __crc32c_sparc64_finup(u32 *crcp, const u8 *data, unsigned int len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) u8 *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) u32 tmp = *crcp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) crc32c_compute(&tmp, (const u64 *) data, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) *(__le32 *) out = ~cpu_to_le32(tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static int crc32c_sparc64_finup(struct shash_desc *desc, const u8 *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) unsigned int len, u8 *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return __crc32c_sparc64_finup(shash_desc_ctx(desc), data, len, out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) static int crc32c_sparc64_final(struct shash_desc *desc, u8 *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) u32 *crcp = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) *(__le32 *) out = ~cpu_to_le32p(crcp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static int crc32c_sparc64_digest(struct shash_desc *desc, const u8 *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) unsigned int len, u8 *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return __crc32c_sparc64_finup(crypto_shash_ctx(desc->tfm), data, len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static int crc32c_sparc64_cra_init(struct crypto_tfm *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) u32 *key = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) *key = ~0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) #define CHKSUM_BLOCK_SIZE 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) #define CHKSUM_DIGEST_SIZE 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static struct shash_alg alg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) .setkey = crc32c_sparc64_setkey,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) .init = crc32c_sparc64_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) .update = crc32c_sparc64_update,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .final = crc32c_sparc64_final,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) .finup = crc32c_sparc64_finup,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) .digest = crc32c_sparc64_digest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) .descsize = sizeof(u32),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) .digestsize = CHKSUM_DIGEST_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) .base = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .cra_name = "crc32c",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) .cra_driver_name = "crc32c-sparc64",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) .cra_priority = SPARC_CR_OPCODE_PRIORITY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) .cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) .cra_blocksize = CHKSUM_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) .cra_ctxsize = sizeof(u32),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) .cra_alignmask = 7,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) .cra_module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) .cra_init = crc32c_sparc64_cra_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static bool __init sparc64_has_crc32c_opcode(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) unsigned long cfr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (!(cfr & CFR_CRC32C))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static int __init crc32c_sparc64_mod_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) if (sparc64_has_crc32c_opcode()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) pr_info("Using sparc64 crc32c opcode optimized CRC32C implementation\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) return crypto_register_shash(&alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) pr_info("sparc64 crc32c opcode not available.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static void __exit crc32c_sparc64_mod_fini(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) crypto_unregister_shash(&alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) module_init(crc32c_sparc64_mod_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) module_exit(crc32c_sparc64_mod_fini);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) MODULE_DESCRIPTION("CRC32c (Castagnoli), sparc64 crc32c opcode accelerated");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) MODULE_ALIAS_CRYPTO("crc32c");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) #include "crop_devid.c"
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Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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