/* SPDX-License-Identifier: BSD-3-Clause * Copyright(c) 2019-2020 Broadcom * All rights reserved. */ #include #include #include #include #include #include "lookup3.h" #include "rand.h" #include "hcapi_cfa_defs.h" #define HCAPI_CFA_LKUP_SEED_MEM_SIZE 512 uint32_t hcapi_cfa_lkup_lkup3_init_cfg; uint32_t hcapi_cfa_lkup_em_seed_mem[HCAPI_CFA_LKUP_SEED_MEM_SIZE]; bool hcapi_cfa_lkup_init; static inline uint32_t SWAP_WORDS32(uint32_t val32) { return (((val32 & 0x0000ffff) << 16) | ((val32 & 0xffff0000) >> 16)); } static void hcapi_cfa_seeds_init(void) { int i; uint32_t r; if (hcapi_cfa_lkup_init) return; hcapi_cfa_lkup_init = true; /* Initialize the lfsr */ rand_init(); /* RX and TX use the same seed values */ hcapi_cfa_lkup_lkup3_init_cfg = SWAP_WORDS32(rand32()); for (i = 0; i < HCAPI_CFA_LKUP_SEED_MEM_SIZE / 2; i++) { r = SWAP_WORDS32(rand32()); hcapi_cfa_lkup_em_seed_mem[i * 2] = r; r = SWAP_WORDS32(rand32()); hcapi_cfa_lkup_em_seed_mem[i * 2 + 1] = (r & 0x1); } } /* CRC32i support for Key0 hash */ #define ucrc32(ch, crc) (crc32tbl[((crc) ^ (ch)) & 0xff] ^ ((crc) >> 8)) #define crc32(x, y) crc32i(~0, x, y) static const uint32_t crc32tbl[] = { /* CRC polynomial 0xedb88320 */ 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d }; static uint32_t hcapi_cfa_crc32i(uint32_t crc, const uint8_t *buf, size_t len) { int l; #ifdef TF_EEM_DEBUG TFP_DRV_LOG(DEBUG, "CRC2:"); #endif for (l = (len - 1); l >= 0; l--) { crc = ucrc32(buf[l], crc); #ifdef TF_EEM_DEBUG TFP_DRV_LOG(DEBUG, "%02X %08X %08X\n", (buf[l] & 0xff), crc, ~crc); #endif } #ifdef TF_EEM_DEBUG TFP_DRV_LOG(DEBUG, "\n"); #endif return ~crc; } static uint32_t hcapi_cfa_crc32_hash(uint8_t *key) { int i; uint32_t index; uint32_t val1, val2; uint8_t temp[4]; uint8_t *kptr = key; /* Do byte-wise XOR of the 52-byte HASH key first. */ index = *key; kptr--; for (i = CFA_P4_EEM_KEY_MAX_SIZE - 2; i >= 0; i--) { index = index ^ *kptr; kptr--; } /* Get seeds */ val1 = hcapi_cfa_lkup_em_seed_mem[index * 2]; val2 = hcapi_cfa_lkup_em_seed_mem[index * 2 + 1]; temp[3] = (uint8_t)(val1 >> 24); temp[2] = (uint8_t)(val1 >> 16); temp[1] = (uint8_t)(val1 >> 8); temp[0] = (uint8_t)(val1 & 0xff); val1 = 0; /* Start with seed */ if (!(val2 & 0x1)) val1 = hcapi_cfa_crc32i(~val1, temp, 4); val1 = hcapi_cfa_crc32i(~val1, (key - (CFA_P4_EEM_KEY_MAX_SIZE - 1)), CFA_P4_EEM_KEY_MAX_SIZE); /* End with seed */ if (val2 & 0x1) val1 = hcapi_cfa_crc32i(~val1, temp, 4); return val1; } static uint32_t hcapi_cfa_lookup3_hash(uint8_t *in_key) { uint32_t val1; val1 = hashword(((const uint32_t *)(uintptr_t *)in_key) + 1, CFA_P4_EEM_KEY_MAX_SIZE / (sizeof(uint32_t)), hcapi_cfa_lkup_lkup3_init_cfg); return val1; } uint64_t hcapi_get_table_page(struct hcapi_cfa_em_table *mem, uint32_t page) { int level = 0; uint64_t addr; if (mem == NULL) return 0; /* * Use the level according to the num_level of page table */ level = mem->num_lvl - 1; addr = (uintptr_t)mem->pg_tbl[level].pg_va_tbl[page]; return addr; } /** Approximation of HCAPI hcapi_cfa_key_hash() * * Return: * */ uint64_t hcapi_cfa_key_hash(uint64_t *key_data, uint16_t bitlen) { uint32_t key0_hash; uint32_t key1_hash; /* * Init the seeds if needed */ if (!hcapi_cfa_lkup_init) hcapi_cfa_seeds_init(); key0_hash = hcapi_cfa_crc32_hash(((uint8_t *)key_data) + (bitlen / 8) - 1); key1_hash = hcapi_cfa_lookup3_hash((uint8_t *)key_data); return ((uint64_t)key0_hash) << 32 | (uint64_t)key1_hash; } static int hcapi_cfa_key_hw_op_put(struct hcapi_cfa_hwop *op, struct hcapi_cfa_key_data *key_obj) { int rc = 0; memcpy((uint8_t *)(uintptr_t)op->hw.base_addr + key_obj->offset, key_obj->data, key_obj->size); return rc; } static int hcapi_cfa_key_hw_op_get(struct hcapi_cfa_hwop *op, struct hcapi_cfa_key_data *key_obj) { int rc = 0; memcpy(key_obj->data, (uint8_t *)(uintptr_t)op->hw.base_addr + key_obj->offset, key_obj->size); return rc; } static int hcapi_cfa_key_hw_op_add(struct hcapi_cfa_hwop *op, struct hcapi_cfa_key_data *key_obj) { int rc = 0; struct cfa_p4_eem_64b_entry table_entry; /* * Is entry free? */ memcpy(&table_entry, (uint8_t *)(uintptr_t)op->hw.base_addr + key_obj->offset, key_obj->size); /* * If this is entry is valid then report failure */ if (table_entry.hdr.word1 & (1 << CFA_P4_EEM_ENTRY_VALID_SHIFT)) return -1; memcpy((uint8_t *)(uintptr_t)op->hw.base_addr + key_obj->offset, key_obj->data, key_obj->size); return rc; } static int hcapi_cfa_key_hw_op_del(struct hcapi_cfa_hwop *op, struct hcapi_cfa_key_data *key_obj) { int rc = 0; struct cfa_p4_eem_64b_entry table_entry; /* * Read entry */ memcpy(&table_entry, (uint8_t *)(uintptr_t)op->hw.base_addr + key_obj->offset, key_obj->size); /* * If this is not a valid entry then report failure. */ if (table_entry.hdr.word1 & (1 << CFA_P4_EEM_ENTRY_VALID_SHIFT)) { /* * If a key has been provided then verify the key matches * before deleting the entry. */ if (key_obj->data != NULL) { if (memcmp(&table_entry, key_obj->data, key_obj->size) != 0) return -1; } } else { return -1; } /* * Delete entry */ memset((uint8_t *)(uintptr_t)op->hw.base_addr + key_obj->offset, 0, key_obj->size); return rc; } /** Apporiximation of hcapi_cfa_key_hw_op() * * */ int hcapi_cfa_key_hw_op(struct hcapi_cfa_hwop *op, struct hcapi_cfa_key_tbl *key_tbl, struct hcapi_cfa_key_data *key_obj, struct hcapi_cfa_key_loc *key_loc) { int rc = 0; if (op == NULL || key_tbl == NULL || key_obj == NULL || key_loc == NULL) return -1; op->hw.base_addr = hcapi_get_table_page((struct hcapi_cfa_em_table *) key_tbl->base0, key_obj->offset / key_tbl->page_size); /* Offset is adjusted to be the offset into the page */ key_obj->offset = key_obj->offset % key_tbl->page_size; if (op->hw.base_addr == 0) return -1; switch (op->opcode) { case HCAPI_CFA_HWOPS_PUT: /**< Write to HW operation */ rc = hcapi_cfa_key_hw_op_put(op, key_obj); break; case HCAPI_CFA_HWOPS_GET: /**< Read from HW operation */ rc = hcapi_cfa_key_hw_op_get(op, key_obj); break; case HCAPI_CFA_HWOPS_ADD: /**< For operations which require more than * simple writes to HW, this operation is used. The * distinction with this operation when compared * to the PUT ops is that this operation is used * in conjunction with the HCAPI_CFA_HWOPS_DEL * op to remove the operations issued by the * ADD OP. */ rc = hcapi_cfa_key_hw_op_add(op, key_obj); break; case HCAPI_CFA_HWOPS_DEL: rc = hcapi_cfa_key_hw_op_del(op, key_obj); break; default: rc = -1; break; } return rc; }