drivers/crypto/caam/desc_constr.h

   1 /*
   2  * caam descriptor construction helper functions
   3  *
   4  * Copyright 2008-2012 Freescale Semiconductor, Inc.
   5  */
   6
   7 #include "desc.h"
   8
   9 #define IMMEDIATE (1 << 23)
  10 #define CAAM_CMD_SZ sizeof(u32)
  11 #define CAAM_PTR_SZ sizeof(dma_addr_t)
  12 #define CAAM_DESC_BYTES_MAX (CAAM_CMD_SZ * MAX_CAAM_DESCSIZE)
  13 #define DESC_JOB_IO_LEN (CAAM_CMD_SZ * 5 + CAAM_PTR_SZ * 3)
  14
  15 #ifdef DEBUG
  16 #define PRINT_POS do { printk(KERN_DEBUG "%02d: %s\n", desc_len(desc),\
  17                               &__func__[sizeof("append")]); } while (0)
  18 #else
  19 #define PRINT_POS
  20 #endif
  21
  22 #define SET_OK_NO_PROP_ERRORS (IMMEDIATE | LDST_CLASS_DECO | \
  23                                LDST_SRCDST_WORD_DECOCTRL | \
  24                                (LDOFF_CHG_SHARE_OK_NO_PROP << \
  25                                 LDST_OFFSET_SHIFT))
  26 #define DISABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \
  27                                 LDST_SRCDST_WORD_DECOCTRL | \
  28                                 (LDOFF_DISABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))
  29 #define ENABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \
  30                                LDST_SRCDST_WORD_DECOCTRL | \
  31                                (LDOFF_ENABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))
  32
  33 static inline int desc_len(u32 *desc)
  34 {
  35         return *desc & HDR_DESCLEN_MASK;
  36 }
  37
  38 static inline int desc_bytes(void *desc)
  39 {
  40         return desc_len(desc) * CAAM_CMD_SZ;
  41 }
  42
  43 static inline u32 *desc_end(u32 *desc)
  44 {
  45         return desc + desc_len(desc);
  46 }
  47
  48 static inline void *sh_desc_pdb(u32 *desc)
  49 {
  50         return desc + 1;
  51 }
  52
  53 static inline void init_desc(u32 *desc, u32 options)
  54 {
  55         *desc = (options | HDR_ONE) + 1;
  56 }
  57
  58 static inline void init_sh_desc(u32 *desc, u32 options)
  59 {
  60         PRINT_POS;
  61         init_desc(desc, CMD_SHARED_DESC_HDR | options);
  62 }
  63
  64 static inline void init_sh_desc_pdb(u32 *desc, u32 options, size_t pdb_bytes)
  65 {
  66         u32 pdb_len = (pdb_bytes + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ;
  67
  68         init_sh_desc(desc, (((pdb_len + 1) << HDR_START_IDX_SHIFT) + pdb_len) |
  69                      options);
  70 }
  71
  72 static inline void init_job_desc(u32 *desc, u32 options)
  73 {
  74         init_desc(desc, CMD_DESC_HDR | options);
  75 }
  76
  77 static inline void append_ptr(u32 *desc, dma_addr_t ptr)
  78 {
  79         dma_addr_t *offset = (dma_addr_t *)desc_end(desc);
  80
  81         *offset = ptr;
  82
  83         (*desc) += CAAM_PTR_SZ / CAAM_CMD_SZ;
  84 }
  85
  86 static inline void init_job_desc_shared(u32 *desc, dma_addr_t ptr, int len,
  87                                         u32 options)
  88 {
  89         PRINT_POS;
  90         init_job_desc(desc, HDR_SHARED | options |
  91                       (len << HDR_START_IDX_SHIFT));
  92         append_ptr(desc, ptr);
  93 }
  94
  95 static inline void append_data(u32 *desc, void *data, int len)
  96 {
  97         u32 *offset = desc_end(desc);
  98
  99         if (len) /* avoid sparse warning: memcpy with byte count of 0 */
 100                 memcpy(offset, data, len);
 101
 102         (*desc) += (len + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ;
 103 }
 104
 105 static inline void append_cmd(u32 *desc, u32 command)
 106 {
 107         u32 *cmd = desc_end(desc);
 108
 109         *cmd = command;
 110
 111         (*desc)++;
 112 }
 113
 114 #define append_u32 append_cmd
 115
 116 static inline void append_u64(u32 *desc, u64 data)
 117 {
 118         u32 *offset = desc_end(desc);
 119
 120         *offset = upper_32_bits(data);
 121         *(++offset) = lower_32_bits(data);
 122
 123         (*desc) += 2;
 124 }
 125
 126 /* Write command without affecting header, and return pointer to next word */
 127 static inline u32 *write_cmd(u32 *desc, u32 command)
 128 {
 129         *desc = command;
 130
 131         return desc + 1;
 132 }
 133
 134 static inline void append_cmd_ptr(u32 *desc, dma_addr_t ptr, int len,
 135                                   u32 command)
 136 {
 137         append_cmd(desc, command | len);
 138         append_ptr(desc, ptr);
 139 }
 140
 141 /* Write length after pointer, rather than inside command */
 142 static inline void append_cmd_ptr_extlen(u32 *desc, dma_addr_t ptr,
 143                                          unsigned int len, u32 command)
 144 {
 145         append_cmd(desc, command);
 146         if (!(command & (SQIN_RTO | SQIN_PRE)))
 147                 append_ptr(desc, ptr);
 148         append_cmd(desc, len);
 149 }
 150
 151 static inline void append_cmd_data(u32 *desc, void *data, int len,
 152                                    u32 command)
 153 {
 154         append_cmd(desc, command | IMMEDIATE | len);
 155         append_data(desc, data, len);
 156 }
 157
 158 #define APPEND_CMD_RET(cmd, op) \
 159 static inline u32 *append_##cmd(u32 *desc, u32 options) \
 160 { \
 161         u32 *cmd = desc_end(desc); \
 162         PRINT_POS; \
 163         append_cmd(desc, CMD_##op | options); \
 164         return cmd; \
 165 }
 166 APPEND_CMD_RET(jump, JUMP)
 167 APPEND_CMD_RET(move, MOVE)
 168
 169 static inline void set_jump_tgt_here(u32 *desc, u32 *jump_cmd)
 170 {
 171         *jump_cmd = *jump_cmd | (desc_len(desc) - (jump_cmd - desc));
 172 }
 173
 174 static inline void set_move_tgt_here(u32 *desc, u32 *move_cmd)
 175 {
 176         *move_cmd &= ~MOVE_OFFSET_MASK;
 177         *move_cmd = *move_cmd | ((desc_len(desc) << (MOVE_OFFSET_SHIFT + 2)) &
 178                                  MOVE_OFFSET_MASK);
 179 }
 180
 181 #define APPEND_CMD(cmd, op) \
 182 static inline void append_##cmd(u32 *desc, u32 options) \
 183 { \
 184         PRINT_POS; \
 185         append_cmd(desc, CMD_##op | options); \
 186 }
 187 APPEND_CMD(operation, OPERATION)
 188
 189 #define APPEND_CMD_LEN(cmd, op) \
 190 static inline void append_##cmd(u32 *desc, unsigned int len, u32 options) \
 191 { \
 192         PRINT_POS; \
 193         append_cmd(desc, CMD_##op | len | options); \
 194 }
 195
 196 APPEND_CMD_LEN(seq_load, SEQ_LOAD)
 197 APPEND_CMD_LEN(seq_store, SEQ_STORE)
 198 APPEND_CMD_LEN(seq_fifo_load, SEQ_FIFO_LOAD)
 199 APPEND_CMD_LEN(seq_fifo_store, SEQ_FIFO_STORE)
 200
 201 #define APPEND_CMD_PTR(cmd, op) \
 202 static inline void append_##cmd(u32 *desc, dma_addr_t ptr, unsigned int len, \
 203                                 u32 options) \
 204 { \
 205         PRINT_POS; \
 206         append_cmd_ptr(desc, ptr, len, CMD_##op | options); \
 207 }
 208 APPEND_CMD_PTR(key, KEY)
 209 APPEND_CMD_PTR(load, LOAD)
 210 APPEND_CMD_PTR(fifo_load, FIFO_LOAD)
 211 APPEND_CMD_PTR(fifo_store, FIFO_STORE)
 212
 213 static inline void append_store(u32 *desc, dma_addr_t ptr, unsigned int len,
 214                                 u32 options)
 215 {
 216         u32 cmd_src;
 217
 218         cmd_src = options & LDST_SRCDST_MASK;
 219
 220         append_cmd(desc, CMD_STORE | options | len);
 221
 222         /* The following options do not require pointer */
 223         if (!(cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED ||
 224               cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB    ||
 225               cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB_WE ||
 226               cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED_WE))
 227                 append_ptr(desc, ptr);
 228 }
 229
 230 #define APPEND_SEQ_PTR_INTLEN(cmd, op) \
 231 static inline void append_seq_##cmd##_ptr_intlen(u32 *desc, dma_addr_t ptr, \
 232                                                  unsigned int len, \
 233                                                  u32 options) \
 234 { \
 235         PRINT_POS; \
 236         if (options & (SQIN_RTO | SQIN_PRE)) \
 237                 append_cmd(desc, CMD_SEQ_##op##_PTR | len | options); \
 238         else \
 239                 append_cmd_ptr(desc, ptr, len, CMD_SEQ_##op##_PTR | options); \
 240 }
 241 APPEND_SEQ_PTR_INTLEN(in, IN)
 242 APPEND_SEQ_PTR_INTLEN(out, OUT)
 243
 244 #define APPEND_CMD_PTR_TO_IMM(cmd, op) \
 245 static inline void append_##cmd##_as_imm(u32 *desc, void *data, \
 246                                          unsigned int len, u32 options) \
 247 { \
 248         PRINT_POS; \
 249         append_cmd_data(desc, data, len, CMD_##op | options); \
 250 }
 251 APPEND_CMD_PTR_TO_IMM(load, LOAD);
 252 APPEND_CMD_PTR_TO_IMM(fifo_load, FIFO_LOAD);
 253
 254 #define APPEND_CMD_PTR_EXTLEN(cmd, op) \
 255 static inline void append_##cmd##_extlen(u32 *desc, dma_addr_t ptr, \
 256                                          unsigned int len, u32 options) \
 257 { \
 258         PRINT_POS; \
 259         append_cmd_ptr_extlen(desc, ptr, len, CMD_##op | SQIN_EXT | options); \
 260 }
 261 APPEND_CMD_PTR_EXTLEN(seq_in_ptr, SEQ_IN_PTR)
 262 APPEND_CMD_PTR_EXTLEN(seq_out_ptr, SEQ_OUT_PTR)
 263
 264 /*
 265  * Determine whether to store length internally or externally depending on
 266  * the size of its type
 267  */
 268 #define APPEND_CMD_PTR_LEN(cmd, op, type) \
 269 static inline void append_##cmd(u32 *desc, dma_addr_t ptr, \
 270                                 type len, u32 options) \
 271 { \
 272         PRINT_POS; \
 273         if (sizeof(type) > sizeof(u16)) \
 274                 append_##cmd##_extlen(desc, ptr, len, options); \
 275         else \
 276                 append_##cmd##_intlen(desc, ptr, len, options); \
 277 }
 278 APPEND_CMD_PTR_LEN(seq_in_ptr, SEQ_IN_PTR, u32)
 279 APPEND_CMD_PTR_LEN(seq_out_ptr, SEQ_OUT_PTR, u32)
 280
 281 /*
 282  * 2nd variant for commands whose specified immediate length differs
 283  * from length of immediate data provided, e.g., split keys
 284  */
 285 #define APPEND_CMD_PTR_TO_IMM2(cmd, op) \
 286 static inline void append_##cmd##_as_imm(u32 *desc, void *data, \
 287                                          unsigned int data_len, \
 288                                          unsigned int len, u32 options) \
 289 { \
 290         PRINT_POS; \
 291         append_cmd(desc, CMD_##op | IMMEDIATE | len | options); \
 292         append_data(desc, data, data_len); \
 293 }
 294 APPEND_CMD_PTR_TO_IMM2(key, KEY);
 295
 296 #define APPEND_CMD_RAW_IMM(cmd, op, type) \
 297 static inline void append_##cmd##_imm_##type(u32 *desc, type immediate, \
 298                                              u32 options) \
 299 { \
 300         PRINT_POS; \
 301         append_cmd(desc, CMD_##op | IMMEDIATE | options | sizeof(type)); \
 302         append_cmd(desc, immediate); \
 303 }
 304 APPEND_CMD_RAW_IMM(load, LOAD, u32);
 305
 306 /*
 307  * Append math command. Only the last part of destination and source need to
 308  * be specified
 309  */
 310 #define APPEND_MATH(op, desc, dest, src_0, src_1, len) \
 311 append_cmd(desc, CMD_MATH | MATH_FUN_##op | MATH_DEST_##dest | \
 312         MATH_SRC0_##src_0 | MATH_SRC1_##src_1 | (u32)len);
 313
 314 #define append_math_add(desc, dest, src0, src1, len) \
 315         APPEND_MATH(ADD, desc, dest, src0, src1, len)
 316 #define append_math_sub(desc, dest, src0, src1, len) \
 317         APPEND_MATH(SUB, desc, dest, src0, src1, len)
 318 #define append_math_add_c(desc, dest, src0, src1, len) \
 319         APPEND_MATH(ADDC, desc, dest, src0, src1, len)
 320 #define append_math_sub_b(desc, dest, src0, src1, len) \
 321         APPEND_MATH(SUBB, desc, dest, src0, src1, len)
 322 #define append_math_and(desc, dest, src0, src1, len) \
 323         APPEND_MATH(AND, desc, dest, src0, src1, len)
 324 #define append_math_or(desc, dest, src0, src1, len) \
 325         APPEND_MATH(OR, desc, dest, src0, src1, len)
 326 #define append_math_xor(desc, dest, src0, src1, len) \
 327         APPEND_MATH(XOR, desc, dest, src0, src1, len)
 328 #define append_math_lshift(desc, dest, src0, src1, len) \
 329         APPEND_MATH(LSHIFT, desc, dest, src0, src1, len)
 330 #define append_math_rshift(desc, dest, src0, src1, len) \
 331         APPEND_MATH(RSHIFT, desc, dest, src0, src1, len)
 332 #define append_math_ldshift(desc, dest, src0, src1, len) \
 333         APPEND_MATH(SHLD, desc, dest, src0, src1, len)
 334
 335 /* Exactly one source is IMM. Data is passed in as u32 value */
 336 #define APPEND_MATH_IMM_u32(op, desc, dest, src_0, src_1, data) \
 337 do { \
 338         APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ); \
 339         append_cmd(desc, data); \
 340 } while (0)
 341
 342 #define append_math_add_imm_u32(desc, dest, src0, src1, data) \
 343         APPEND_MATH_IMM_u32(ADD, desc, dest, src0, src1, data)
 344 #define append_math_sub_imm_u32(desc, dest, src0, src1, data) \
 345         APPEND_MATH_IMM_u32(SUB, desc, dest, src0, src1, data)
 346 #define append_math_add_c_imm_u32(desc, dest, src0, src1, data) \
 347         APPEND_MATH_IMM_u32(ADDC, desc, dest, src0, src1, data)
 348 #define append_math_sub_b_imm_u32(desc, dest, src0, src1, data) \
 349         APPEND_MATH_IMM_u32(SUBB, desc, dest, src0, src1, data)
 350 #define append_math_and_imm_u32(desc, dest, src0, src1, data) \
 351         APPEND_MATH_IMM_u32(AND, desc, dest, src0, src1, data)
 352 #define append_math_or_imm_u32(desc, dest, src0, src1, data) \
 353         APPEND_MATH_IMM_u32(OR, desc, dest, src0, src1, data)
 354 #define append_math_xor_imm_u32(desc, dest, src0, src1, data) \
 355         APPEND_MATH_IMM_u32(XOR, desc, dest, src0, src1, data)
 356 #define append_math_lshift_imm_u32(desc, dest, src0, src1, data) \
 357         APPEND_MATH_IMM_u32(LSHIFT, desc, dest, src0, src1, data)
 358 #define append_math_rshift_imm_u32(desc, dest, src0, src1, data) \
 359         APPEND_MATH_IMM_u32(RSHIFT, desc, dest, src0, src1, data)
 360
 361 /* Exactly one source is IMM. Data is passed in as u64 value */
 362 #define APPEND_MATH_IMM_u64(op, desc, dest, src_0, src_1, data) \
 363 do { \
 364         u32 upper = (data >> 16) >> 16; \
 365         APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ * 2 | \
 366                     (upper ? 0 : MATH_IFB)); \
 367         if (upper) \
 368                 append_u64(desc, data); \
 369         else \
 370                 append_u32(desc, data); \
 371 } while (0)
 372
 373 #define append_math_add_imm_u64(desc, dest, src0, src1, data) \
 374         APPEND_MATH_IMM_u64(ADD, desc, dest, src0, src1, data)
 375 #define append_math_sub_imm_u64(desc, dest, src0, src1, data) \
 376         APPEND_MATH_IMM_u64(SUB, desc, dest, src0, src1, data)
 377 #define append_math_add_c_imm_u64(desc, dest, src0, src1, data) \
 378         APPEND_MATH_IMM_u64(ADDC, desc, dest, src0, src1, data)
 379 #define append_math_sub_b_imm_u64(desc, dest, src0, src1, data) \
 380         APPEND_MATH_IMM_u64(SUBB, desc, dest, src0, src1, data)
 381 #define append_math_and_imm_u64(desc, dest, src0, src1, data) \
 382         APPEND_MATH_IMM_u64(AND, desc, dest, src0, src1, data)
 383 #define append_math_or_imm_u64(desc, dest, src0, src1, data) \
 384         APPEND_MATH_IMM_u64(OR, desc, dest, src0, src1, data)
 385 #define append_math_xor_imm_u64(desc, dest, src0, src1, data) \
 386         APPEND_MATH_IMM_u64(XOR, desc, dest, src0, src1, data)
 387 #define append_math_lshift_imm_u64(desc, dest, src0, src1, data) \
 388         APPEND_MATH_IMM_u64(LSHIFT, desc, dest, src0, src1, data)
 389 #define append_math_rshift_imm_u64(desc, dest, src0, src1, data) \
 390         APPEND_MATH_IMM_u64(RSHIFT, desc, dest, src0, src1, data)