| 1 | /* |
| 2 | * arch/ubicom32/crypto/crypto_ubicom32.h |
| 3 | * Support for Ubicom32 cryptographic instructions. |
| 4 | * |
| 5 | * (C) Copyright 2009, Ubicom, Inc. |
| 6 | * |
| 7 | * This file is part of the Ubicom32 Linux Kernel Port. |
| 8 | * |
| 9 | * The Ubicom32 Linux Kernel Port is free software: you can redistribute |
| 10 | * it and/or modify it under the terms of the GNU General Public License |
| 11 | * as published by the Free Software Foundation, either version 2 of the |
| 12 | * License, or (at your option) any later version. |
| 13 | * |
| 14 | * The Ubicom32 Linux Kernel Port is distributed in the hope that it |
| 15 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied |
| 16 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 17 | * the GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with the Ubicom32 Linux Kernel Port. If not, |
| 21 | * see <http://www.gnu.org/licenses/>. |
| 22 | * |
| 23 | * Ubicom32 implementation derived from (with many thanks): |
| 24 | * arch/m68knommu |
| 25 | * arch/blackfin |
| 26 | * arch/parisc |
| 27 | */ |
| 28 | #ifndef _CRYPTO_ARCH_UBICOM32_CRYPT_H |
| 29 | #define _CRYPTO_ARCH_UBICOM32_CRYPT_H |
| 30 | |
| 31 | #include <linux/module.h> |
| 32 | #include <linux/kernel.h> |
| 33 | #include <linux/jiffies.h> |
| 34 | #include <linux/timer.h> |
| 35 | #include <linux/spinlock.h> |
| 36 | #include <asm/errno.h> |
| 37 | #include <asm/io.h> |
| 38 | #include <asm/ip5000.h> |
| 39 | |
| 40 | #define CRYPTO_UBICOM32_LOOP_ASM 1 |
| 41 | #define CRYPTO_UBICOM32_ALIGNMENT 4 |
| 42 | #define SEC_ALIGNED(p) (((u32)p & 3) == 0) |
| 43 | |
| 44 | #define SEC_BASE SECURITY_BASE |
| 45 | #define SEC_KEY_OFFSET SECURITY_KEY_VALUE(0) |
| 46 | #define SEC_INPUT_OFFSET SECURITY_KEY_IN(0) |
| 47 | #define SEC_OUTPUT_OFFSET SECURITY_KEY_OUT(0) |
| 48 | #define SEC_HASH_OFFSET SECURITY_KEY_HASH(0) |
| 49 | |
| 50 | #define SEC_KEY_128_BITS SECURITY_CTRL_KEY_SIZE(0) |
| 51 | #define SEC_KEY_192_BITS SECURITY_CTRL_KEY_SIZE(1) |
| 52 | #define SEC_KEY_256_BITS SECURITY_CTRL_KEY_SIZE(2) |
| 53 | |
| 54 | #define SEC_HASH_NONE SECURITY_CTRL_HASH_ALG_NONE |
| 55 | #define SEC_HASH_MD5 SECURITY_CTRL_HASH_ALG_MD5 |
| 56 | #define SEC_HASH_SHA1 SECURITY_CTRL_HASH_ALG_SHA1 |
| 57 | |
| 58 | #define SEC_CBC_SET SECURITY_CTRL_CBC |
| 59 | #define SEC_CBC_NONE 0 |
| 60 | |
| 61 | #define SEC_ALG_AES SECURITY_CTRL_CIPHER_ALG_AES |
| 62 | #define SEC_ALG_NONE SECURITY_CTRL_CIPHER_ALG_NONE |
| 63 | #define SEC_ALG_DES SECURITY_CTRL_CIPHER_ALG_DES |
| 64 | #define SEC_ALG_3DES SECURITY_CTRL_CIPHER_ALG_3DES |
| 65 | |
| 66 | #define SEC_DIR_ENCRYPT SECURITY_CTRL_ENCIPHER |
| 67 | #define SEC_DIR_DECRYPT 0 |
| 68 | |
| 69 | #define CRYPTO_UBICOM32_PRIORITY 300 |
| 70 | #define CRYPTO_UBICOM32_COMPOSITE_PRIORITY 400 |
| 71 | |
| 72 | #define HW_CRYPTO_PS_MAX_IDLE_MS 100 /* idle time (ms) before shuting down sm */ |
| 73 | |
| 74 | extern spinlock_t crypto_ubicom32_lock; |
| 75 | extern bool crypto_ubicom32_inited; |
| 76 | extern volatile bool crypto_ubicom32_on; |
| 77 | extern volatile unsigned long crypto_ubicom32_last_use; |
| 78 | extern struct timer_list crypto_ubicom32_ps_timer; |
| 79 | extern void crypto_ubicom32_ps_check(unsigned long data); |
| 80 | |
| 81 | #define SEC_COPY_2W(t, s) \ |
| 82 | asm volatile ( \ |
| 83 | " move.4 0(%0), 0(%1) \n\t" \ |
| 84 | " move.4 4(%0), 4(%1) \n\t" \ |
| 85 | \ |
| 86 | : \ |
| 87 | : "a" (t), "a" (s) \ |
| 88 | ) |
| 89 | |
| 90 | #define SEC_COPY_4W(t, s) \ |
| 91 | asm volatile ( \ |
| 92 | " move.4 0(%0), 0(%1) \n\t" \ |
| 93 | " move.4 4(%0), 4(%1) \n\t" \ |
| 94 | " move.4 8(%0), 8(%1) \n\t" \ |
| 95 | " move.4 12(%0), 12(%1) \n\t" \ |
| 96 | : \ |
| 97 | : "a" (t), "a" (s) \ |
| 98 | ) |
| 99 | |
| 100 | #define SEC_COPY_5W(t, s) \ |
| 101 | asm volatile ( \ |
| 102 | " move.4 0(%0), 0(%1) \n\t" \ |
| 103 | " move.4 4(%0), 4(%1) \n\t" \ |
| 104 | " move.4 8(%0), 8(%1) \n\t" \ |
| 105 | " move.4 12(%0), 12(%1) \n\t" \ |
| 106 | " move.4 16(%0), 16(%1) \n\t" \ |
| 107 | : \ |
| 108 | : "a" (t), "a" (s) \ |
| 109 | ) |
| 110 | |
| 111 | #define SEC_SET_KEY_2W(x) \ |
| 112 | asm volatile ( \ |
| 113 | " ; write key to Security Keyblock \n\t" \ |
| 114 | " move.4 0x10(%0), 0(%1) \n\t" \ |
| 115 | " move.4 0x14(%0), 4(%1) \n\t" \ |
| 116 | : \ |
| 117 | : "a" (SECURITY_BASE), "a" (x) \ |
| 118 | ) |
| 119 | |
| 120 | #define SEC_SET_KEY_4W(x) \ |
| 121 | asm volatile ( \ |
| 122 | " ; write key to Security Keyblock \n\t" \ |
| 123 | " move.4 0x10(%0), 0(%1) \n\t" \ |
| 124 | " move.4 0x14(%0), 4(%1) \n\t" \ |
| 125 | " move.4 0x18(%0), 8(%1) \n\t" \ |
| 126 | " move.4 0x1c(%0), 12(%1) \n\t" \ |
| 127 | : \ |
| 128 | : "a"(SECURITY_BASE), "a"(x) \ |
| 129 | ) |
| 130 | |
| 131 | #define SEC_SET_KEY_6W(x) \ |
| 132 | asm volatile ( \ |
| 133 | " ; write key to Security Keyblock \n\t" \ |
| 134 | " move.4 0x10(%0), 0(%1) \n\t" \ |
| 135 | " move.4 0x14(%0), 4(%1) \n\t" \ |
| 136 | " move.4 0x18(%0), 8(%1) \n\t" \ |
| 137 | " move.4 0x1c(%0), 12(%1) \n\t" \ |
| 138 | " move.4 0x20(%0), 16(%1) \n\t" \ |
| 139 | " move.4 0x24(%0), 20(%1) \n\t" \ |
| 140 | : \ |
| 141 | : "a" (SECURITY_BASE), "a" (x) \ |
| 142 | ) |
| 143 | |
| 144 | #define SEC_SET_KEY_8W(x) \ |
| 145 | asm volatile ( \ |
| 146 | " ; write key to Security Keyblock \n\t" \ |
| 147 | " move.4 0x10(%0), 0(%1) \n\t" \ |
| 148 | " move.4 0x14(%0), 4(%1) \n\t" \ |
| 149 | " move.4 0x18(%0), 8(%1) \n\t" \ |
| 150 | " move.4 0x1c(%0), 12(%1) \n\t" \ |
| 151 | " move.4 0x20(%0), 16(%1) \n\t" \ |
| 152 | " move.4 0x24(%0), 20(%1) \n\t" \ |
| 153 | " move.4 0x28(%0), 24(%1) \n\t" \ |
| 154 | " move.4 0x2c(%0), 28(%1) \n\t" \ |
| 155 | : \ |
| 156 | : "a" (SECURITY_BASE), "a" (x) \ |
| 157 | ) |
| 158 | |
| 159 | #define SEC_SET_KEY_64(k) SEC_SET_KEY_2W(k) |
| 160 | #define SEC_SET_KEY_128(k) SEC_SET_KEY_4W(k) |
| 161 | #define SEC_SET_KEY_192(k) SEC_SET_KEY_6W(k) |
| 162 | #define SEC_SET_KEY_256(k) SEC_SET_KEY_8W(k) |
| 163 | |
| 164 | #define DES_SET_KEY(x) SEC_SET_KEY_64(x) |
| 165 | #define DES3_SET_KEY(x) SEC_SET_KEY_192(x) |
| 166 | |
| 167 | #define SEC_SET_INPUT_2W(x) \ |
| 168 | asm volatile ( \ |
| 169 | " ; write key to Security Keyblock \n\t" \ |
| 170 | " move.4 0x30(%0), 0(%1) \n\t" \ |
| 171 | " move.4 0x34(%0), 4(%1) \n\t" \ |
| 172 | : \ |
| 173 | : "a" (SECURITY_BASE), "a" (x) \ |
| 174 | ) |
| 175 | |
| 176 | #define SEC_GET_OUTPUT_2W(x) \ |
| 177 | asm volatile ( \ |
| 178 | " ; write key to Security Keyblock \n\t" \ |
| 179 | " move.4 0(%1), 0x50(%0) \n\t" \ |
| 180 | " move.4 4(%1), 0x54(%0) \n\t" \ |
| 181 | : \ |
| 182 | : "a" (SECURITY_BASE), "a" (x) \ |
| 183 | ) |
| 184 | |
| 185 | #define SEC_SET_INPUT_4W(x) \ |
| 186 | asm volatile ( \ |
| 187 | " ; write key to Security Keyblock \n\t" \ |
| 188 | " move.4 0x30(%0), 0(%1) \n\t" \ |
| 189 | " move.4 0x34(%0), 4(%1) \n\t" \ |
| 190 | " move.4 0x38(%0), 8(%1) \n\t" \ |
| 191 | " move.4 0x3c(%0), 12(%1) \n\t" \ |
| 192 | : \ |
| 193 | : "a" (SECURITY_BASE), "a" (x) \ |
| 194 | ) |
| 195 | |
| 196 | #define SEC_GET_OUTPUT_4W(x) \ |
| 197 | asm volatile ( \ |
| 198 | " ; read output from Security Keyblock \n\t" \ |
| 199 | " move.4 0(%1), 0x50(%0) \n\t" \ |
| 200 | " move.4 4(%1), 0x54(%0) \n\t" \ |
| 201 | " move.4 8(%1), 0x58(%0) \n\t" \ |
| 202 | " move.4 12(%1), 0x5c(%0) \n\t" \ |
| 203 | : \ |
| 204 | : "a" (SECURITY_BASE), "a" (x) \ |
| 205 | ) |
| 206 | |
| 207 | #define SEC_SET_IV_4W(x) \ |
| 208 | asm volatile ( \ |
| 209 | " ; write IV to Security Keyblock \n\t" \ |
| 210 | " move.4 0x50(%0), 0(%1) \n\t" \ |
| 211 | " move.4 0x54(%0), 4(%1) \n\t" \ |
| 212 | " move.4 0x58(%0), 8(%1) \n\t" \ |
| 213 | " move.4 0x5c(%0), 12(%1) \n\t" \ |
| 214 | : \ |
| 215 | : "a" (SECURITY_BASE), "a" (x) \ |
| 216 | ) |
| 217 | |
| 218 | #define SEC_PIPE_FLUSH() asm volatile ( " pipe_flush 0 \n\t" ) |
| 219 | |
| 220 | static inline void hw_crypto_set_ctrl(uint32_t c) |
| 221 | { |
| 222 | asm volatile ( |
| 223 | " move.4 0(%0), %1 \n\t" |
| 224 | : |
| 225 | : "a" (SECURITY_BASE + SECURITY_CTRL), "d" (c) |
| 226 | ); |
| 227 | } |
| 228 | |
| 229 | static inline void hw_crypto_ps_start(void) |
| 230 | { |
| 231 | crypto_ubicom32_ps_timer.expires = jiffies + msecs_to_jiffies(HW_CRYPTO_PS_MAX_IDLE_MS >> 1); |
| 232 | add_timer(&crypto_ubicom32_ps_timer); |
| 233 | } |
| 234 | |
| 235 | static inline void hw_crypto_turn_on(void) |
| 236 | { |
| 237 | asm volatile ( |
| 238 | " moveai A4, %0 \n\t" |
| 239 | " bset 0x0(A4), 0x0(A4), %1 \n\t" |
| 240 | " cycles 11 \n\t" |
| 241 | : |
| 242 | : "i" (OCP_BASE >> 7), "i" (GEN_CLK_PLL_SECURITY_BIT_NO) |
| 243 | : "a4", "cc" |
| 244 | ); |
| 245 | crypto_ubicom32_on = true; |
| 246 | } |
| 247 | |
| 248 | static inline void hw_crypto_turn_off(void) |
| 249 | { |
| 250 | asm volatile ( |
| 251 | " moveai A4, %0 \n\t" |
| 252 | " bclr 0x0(A4), 0x0(A4), %1 \n\t" |
| 253 | : |
| 254 | : "i" (OCP_BASE >> 7), "i" (GEN_CLK_PLL_SECURITY_BIT_NO) |
| 255 | : "a4", "cc" |
| 256 | ); |
| 257 | crypto_ubicom32_on = false; |
| 258 | } |
| 259 | |
| 260 | /* |
| 261 | * hw_crypto_check |
| 262 | * Most probably hw crypto is called in clusters and it makes no sense to turn it off |
| 263 | * and on and waster 13 cycles every time. |
| 264 | */ |
| 265 | static inline void hw_crypto_check(void) |
| 266 | { |
| 267 | if (likely(crypto_ubicom32_on)) { |
| 268 | return; |
| 269 | } |
| 270 | crypto_ubicom32_last_use = jiffies; |
| 271 | hw_crypto_turn_on(); |
| 272 | hw_crypto_ps_start(); |
| 273 | } |
| 274 | |
| 275 | /* |
| 276 | * hw_crypto_ps_init |
| 277 | * Init power save timer |
| 278 | */ |
| 279 | static inline void hw_crypto_ps_init(void) |
| 280 | { |
| 281 | init_timer_deferrable(&crypto_ubicom32_ps_timer); |
| 282 | crypto_ubicom32_ps_timer.function = crypto_ubicom32_ps_check; |
| 283 | crypto_ubicom32_ps_timer.data = 0; |
| 284 | } |
| 285 | |
| 286 | /* |
| 287 | * hw_crypto_init() |
| 288 | * Initialize OCP security module lock and disables its clock. |
| 289 | */ |
| 290 | static inline void hw_crypto_init(void) |
| 291 | { |
| 292 | if (!crypto_ubicom32_inited) { |
| 293 | crypto_ubicom32_inited = true; |
| 294 | spin_lock_init(&crypto_ubicom32_lock); |
| 295 | hw_crypto_ps_init(); |
| 296 | hw_crypto_turn_off(); |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | /* |
| 301 | * hw_crypto_lock() |
| 302 | * Locks the OCP security module and enables its clock. |
| 303 | */ |
| 304 | static inline void hw_crypto_lock(void) |
| 305 | { |
| 306 | spin_lock_bh(&crypto_ubicom32_lock); |
| 307 | } |
| 308 | |
| 309 | /* |
| 310 | * hw_crypto_unlock() |
| 311 | * Unlocks the OCP security module and disables its clock. |
| 312 | */ |
| 313 | static inline void hw_crypto_unlock(void) |
| 314 | { |
| 315 | crypto_ubicom32_last_use = jiffies; |
| 316 | spin_unlock_bh(&crypto_ubicom32_lock); |
| 317 | } |
| 318 | |
| 319 | #define CONFIG_CRYPTO_UBICOM32_DEBUG 1 |
| 320 | |
| 321 | #ifdef CONFIG_CRYPTO_UBICOM32_DEBUG |
| 322 | static inline void hex_dump(void *buf, int b_size, const char *msg) |
| 323 | { |
| 324 | u8 *b = (u8 *)buf; |
| 325 | int i; |
| 326 | if (msg) { |
| 327 | printk("%s:\t", msg); |
| 328 | } |
| 329 | |
| 330 | for (i=0; i < b_size; i++) { |
| 331 | printk("%02x ", b[i]); |
| 332 | if ((i & 3) == 3) { |
| 333 | printk(" "); |
| 334 | } |
| 335 | if ((i & 31) == 31) { |
| 336 | printk("\n"); |
| 337 | } |
| 338 | } |
| 339 | printk("\n"); |
| 340 | } |
| 341 | #define UBICOM32_SEC_DUMP(a, b, c) hex_dump(a, b, c) |
| 342 | #else |
| 343 | #define UBICOM32_SEC_DUMP(a, b, c) |
| 344 | #endif |
| 345 | |
| 346 | #endif /* _CRYPTO_ARCH_UBICOM32_CRYPT_H */ |
| 347 | |
