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 #include "regs.h"
   9
  10 #define IMMEDIATE (1 << 23)
  11 #define CAAM_CMD_SZ sizeof(u32)
  12 #define CAAM_PTR_SZ sizeof(dma_addr_t)
  13 #define CAAM_DESC_BYTES_MAX (CAAM_CMD_SZ * MAX_CAAM_DESCSIZE)
  14 #define DESC_JOB_IO_LEN (CAAM_CMD_SZ * 5 + CAAM_PTR_SZ * 3)
  15
  16 #ifdef DEBUG
  17 #define PRINT_POS do { printk(KERN_DEBUG "%02d: %s\n", desc_len(desc),\
  18                               &__func__[sizeof("append")]); } while (0)
  19 #else
  20 #define PRINT_POS
  21 #endif
  22
  23 #define SET_OK_NO_PROP_ERRORS (IMMEDIATE | LDST_CLASS_DECO | \
  24                                LDST_SRCDST_WORD_DECOCTRL | \
  25                                (LDOFF_CHG_SHARE_OK_NO_PROP << \
  26                                 LDST_OFFSET_SHIFT))
  27 #define DISABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \
  28                                 LDST_SRCDST_WORD_DECOCTRL | \
  29                                 (LDOFF_DISABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))
  30 #define ENABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \
  31                                LDST_SRCDST_WORD_DECOCTRL | \
  32                                (LDOFF_ENABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))
  33
  34 extern bool caam_little_end;
  35
  36 static inline int desc_len(u32 *desc)
  37 {
  38         return caam32_to_cpu(*desc) & HDR_DESCLEN_MASK;
  39 }
  40
  41 static inline int desc_bytes(void *desc)
  42 {
  43         return desc_len(desc) * CAAM_CMD_SZ;
  44 }
  45
  46 static inline u32 *desc_end(u32 *desc)
  47 {
  48         return desc + desc_len(desc);
  49 }
  50
  51 static inline void *sh_desc_pdb(u32 *desc)
  52 {
  53         return desc + 1;
  54 }
  55
  56 static inline void init_desc(u32 *desc, u32 options)
  57 {
  58         *desc = cpu_to_caam32((options | HDR_ONE) + 1);
  59 }
  60
  61 static inline void init_sh_desc(u32 *desc, u32 options)
  62 {
  63         PRINT_POS;
  64         init_desc(desc, CMD_SHARED_DESC_HDR | options);
  65 }
  66
  67 static inline void init_sh_desc_pdb(u32 *desc, u32 options, size_t pdb_bytes)
  68 {
  69         u32 pdb_len = (pdb_bytes + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ;
  70
  71         init_sh_desc(desc, (((pdb_len + 1) << HDR_START_IDX_SHIFT) + pdb_len) |
  72                      options);
  73 }
  74
  75 static inline void init_job_desc(u32 *desc, u32 options)
  76 {
  77         init_desc(desc, CMD_DESC_HDR | options);
  78 }
  79
  80 static inline void init_job_desc_pdb(u32 *desc, u32 options, size_t pdb_bytes)
  81 {
  82         u32 pdb_len = (pdb_bytes + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ;
  83
  84         init_job_desc(desc, (((pdb_len + 1) << HDR_START_IDX_SHIFT)) | options);
  85 }
  86
  87 static inline void append_ptr(u32 *desc, dma_addr_t ptr)
  88 {
  89         dma_addr_t *offset = (dma_addr_t *)desc_end(desc);
  90
  91         *offset = cpu_to_caam_dma(ptr);
  92
  93         (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) +
  94                                 CAAM_PTR_SZ / CAAM_CMD_SZ);
  95 }
  96
  97 static inline void init_job_desc_shared(u32 *desc, dma_addr_t ptr, int len,
  98                                         u32 options)
  99 {
 100         PRINT_POS;
 101         init_job_desc(desc, HDR_SHARED | options |
 102                       (len << HDR_START_IDX_SHIFT));
 103         append_ptr(desc, ptr);
 104 }
 105
 106 static inline void append_data(u32 *desc, void *data, int len)
 107 {
 108         u32 *offset = desc_end(desc);
 109
 110         if (len) /* avoid sparse warning: memcpy with byte count of 0 */
 111                 memcpy(offset, data, len);
 112
 113         (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) +
 114                                 (len + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ);
 115 }
 116
 117 static inline void append_cmd(u32 *desc, u32 command)
 118 {
 119         u32 *cmd = desc_end(desc);
 120
 121         *cmd = cpu_to_caam32(command);
 122
 123         (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 1);
 124 }
 125
 126 #define append_u32 append_cmd
 127
 128 static inline void append_u64(u32 *desc, u64 data)
 129 {
 130         u32 *offset = desc_end(desc);
 131
 132         /* Only 32-bit alignment is guaranteed in descriptor buffer */
 133         if (caam_little_end) {
 134                 *offset = cpu_to_caam32(lower_32_bits(data));
 135                 *(++offset) = cpu_to_caam32(upper_32_bits(data));
 136         } else {
 137                 *offset = cpu_to_caam32(upper_32_bits(data));
 138                 *(++offset) = cpu_to_caam32(lower_32_bits(data));
 139         }
 140
 141         (*desc) = cpu_to_caam32(caam32_to_cpu(*desc) + 2);
 142 }
 143
 144 /* Write command without affecting header, and return pointer to next word */
 145 static inline u32 *write_cmd(u32 *desc, u32 command)
 146 {
 147         *desc = cpu_to_caam32(command);
 148
 149         return desc + 1;
 150 }
 151
 152 static inline void append_cmd_ptr(u32 *desc, dma_addr_t ptr, int len,
 153                                   u32 command)
 154 {
 155         append_cmd(desc, command | len);
 156         append_ptr(desc, ptr);
 157 }
 158
 159 /* Write length after pointer, rather than inside command */
 160 static inline void append_cmd_ptr_extlen(u32 *desc, dma_addr_t ptr,
 161                                          unsigned int len, u32 command)
 162 {
 163         append_cmd(desc, command);
 164         if (!(command & (SQIN_RTO | SQIN_PRE)))
 165                 append_ptr(desc, ptr);
 166         append_cmd(desc, len);
 167 }
 168
 169 static inline void append_cmd_data(u32 *desc, void *data, int len,
 170                                    u32 command)
 171 {
 172         append_cmd(desc, command | IMMEDIATE | len);
 173         append_data(desc, data, len);
 174 }
 175
 176 #define APPEND_CMD_RET(cmd, op) \
 177 static inline u32 *append_##cmd(u32 *desc, u32 options) \
 178 { \
 179         u32 *cmd = desc_end(desc); \
 180         PRINT_POS; \
 181         append_cmd(desc, CMD_##op | options); \
 182         return cmd; \
 183 }
 184 APPEND_CMD_RET(jump, JUMP)
 185 APPEND_CMD_RET(move, MOVE)
 186
 187 static inline void set_jump_tgt_here(u32 *desc, u32 *jump_cmd)
 188 {
 189         *jump_cmd = cpu_to_caam32(caam32_to_cpu(*jump_cmd) |
 190                                   (desc_len(desc) - (jump_cmd - desc)));
 191 }
 192
 193 static inline void set_move_tgt_here(u32 *desc, u32 *move_cmd)
 194 {
 195         u32 val = caam32_to_cpu(*move_cmd);
 196
 197         val &= ~MOVE_OFFSET_MASK;
 198         val |= (desc_len(desc) << (MOVE_OFFSET_SHIFT + 2)) & MOVE_OFFSET_MASK;
 199         *move_cmd = cpu_to_caam32(val);
 200 }
 201
 202 #define APPEND_CMD(cmd, op) \
 203 static inline void append_##cmd(u32 *desc, u32 options) \
 204 { \
 205         PRINT_POS; \
 206         append_cmd(desc, CMD_##op | options); \
 207 }
 208 APPEND_CMD(operation, OPERATION)
 209
 210 #define APPEND_CMD_LEN(cmd, op) \
 211 static inline void append_##cmd(u32 *desc, unsigned int len, u32 options) \
 212 { \
 213         PRINT_POS; \
 214         append_cmd(desc, CMD_##op | len | options); \
 215 }
 216
 217 APPEND_CMD_LEN(seq_load, SEQ_LOAD)
 218 APPEND_CMD_LEN(seq_store, SEQ_STORE)
 219 APPEND_CMD_LEN(seq_fifo_load, SEQ_FIFO_LOAD)
 220 APPEND_CMD_LEN(seq_fifo_store, SEQ_FIFO_STORE)
 221
 222 #define APPEND_CMD_PTR(cmd, op) \
 223 static inline void append_##cmd(u32 *desc, dma_addr_t ptr, unsigned int len, \
 224                                 u32 options) \
 225 { \
 226         PRINT_POS; \
 227         append_cmd_ptr(desc, ptr, len, CMD_##op | options); \
 228 }
 229 APPEND_CMD_PTR(key, KEY)
 230 APPEND_CMD_PTR(load, LOAD)
 231 APPEND_CMD_PTR(fifo_load, FIFO_LOAD)
 232 APPEND_CMD_PTR(fifo_store, FIFO_STORE)
 233
 234 static inline void append_store(u32 *desc, dma_addr_t ptr, unsigned int len,
 235                                 u32 options)
 236 {
 237         u32 cmd_src;
 238
 239         cmd_src = options & LDST_SRCDST_MASK;
 240
 241         append_cmd(desc, CMD_STORE | options | len);
 242
 243         /* The following options do not require pointer */
 244         if (!(cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED ||
 245               cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB    ||
 246               cmd_src == LDST_SRCDST_WORD_DESCBUF_JOB_WE ||
 247               cmd_src == LDST_SRCDST_WORD_DESCBUF_SHARED_WE))
 248                 append_ptr(desc, ptr);
 249 }
 250
 251 #define APPEND_SEQ_PTR_INTLEN(cmd, op) \
 252 static inline void append_seq_##cmd##_ptr_intlen(u32 *desc, dma_addr_t ptr, \
 253                                                  unsigned int len, \
 254                                                  u32 options) \
 255 { \
 256         PRINT_POS; \
 257         if (options & (SQIN_RTO | SQIN_PRE)) \
 258                 append_cmd(desc, CMD_SEQ_##op##_PTR | len | options); \
 259         else \
 260                 append_cmd_ptr(desc, ptr, len, CMD_SEQ_##op##_PTR | options); \
 261 }
 262 APPEND_SEQ_PTR_INTLEN(in, IN)
 263 APPEND_SEQ_PTR_INTLEN(out, OUT)
 264
 265 #define APPEND_CMD_PTR_TO_IMM(cmd, op) \
 266 static inline void append_##cmd##_as_imm(u32 *desc, void *data, \
 267                                          unsigned int len, u32 options) \
 268 { \
 269         PRINT_POS; \
 270         append_cmd_data(desc, data, len, CMD_##op | options); \
 271 }
 272 APPEND_CMD_PTR_TO_IMM(load, LOAD);
 273 APPEND_CMD_PTR_TO_IMM(fifo_load, FIFO_LOAD);
 274
 275 #define APPEND_CMD_PTR_EXTLEN(cmd, op) \
 276 static inline void append_##cmd##_extlen(u32 *desc, dma_addr_t ptr, \
 277                                          unsigned int len, u32 options) \
 278 { \
 279         PRINT_POS; \
 280         append_cmd_ptr_extlen(desc, ptr, len, CMD_##op | SQIN_EXT | options); \
 281 }
 282 APPEND_CMD_PTR_EXTLEN(seq_in_ptr, SEQ_IN_PTR)
 283 APPEND_CMD_PTR_EXTLEN(seq_out_ptr, SEQ_OUT_PTR)
 284
 285 /*
 286  * Determine whether to store length internally or externally depending on
 287  * the size of its type
 288  */
 289 #define APPEND_CMD_PTR_LEN(cmd, op, type) \
 290 static inline void append_##cmd(u32 *desc, dma_addr_t ptr, \
 291                                 type len, u32 options) \
 292 { \
 293         PRINT_POS; \
 294         if (sizeof(type) > sizeof(u16)) \
 295                 append_##cmd##_extlen(desc, ptr, len, options); \
 296         else \
 297                 append_##cmd##_intlen(desc, ptr, len, options); \
 298 }
 299 APPEND_CMD_PTR_LEN(seq_in_ptr, SEQ_IN_PTR, u32)
 300 APPEND_CMD_PTR_LEN(seq_out_ptr, SEQ_OUT_PTR, u32)
 301
 302 /*
 303  * 2nd variant for commands whose specified immediate length differs
 304  * from length of immediate data provided, e.g., split keys
 305  */
 306 #define APPEND_CMD_PTR_TO_IMM2(cmd, op) \
 307 static inline void append_##cmd##_as_imm(u32 *desc, void *data, \
 308                                          unsigned int data_len, \
 309                                          unsigned int len, u32 options) \
 310 { \
 311         PRINT_POS; \
 312         append_cmd(desc, CMD_##op | IMMEDIATE | len | options); \
 313         append_data(desc, data, data_len); \
 314 }
 315 APPEND_CMD_PTR_TO_IMM2(key, KEY);
 316
 317 #define APPEND_CMD_RAW_IMM(cmd, op, type) \
 318 static inline void append_##cmd##_imm_##type(u32 *desc, type immediate, \
 319                                              u32 options) \
 320 { \
 321         PRINT_POS; \
 322         append_cmd(desc, CMD_##op | IMMEDIATE | options | sizeof(type)); \
 323         append_cmd(desc, immediate); \
 324 }
 325 APPEND_CMD_RAW_IMM(load, LOAD, u32);
 326
 327 /*
 328  * Append math command. Only the last part of destination and source need to
 329  * be specified
 330  */
 331 #define APPEND_MATH(op, desc, dest, src_0, src_1, len) \
 332 append_cmd(desc, CMD_MATH | MATH_FUN_##op | MATH_DEST_##dest | \
 333         MATH_SRC0_##src_0 | MATH_SRC1_##src_1 | (u32)len);
 334
 335 #define append_math_add(desc, dest, src0, src1, len) \
 336         APPEND_MATH(ADD, desc, dest, src0, src1, len)
 337 #define append_math_sub(desc, dest, src0, src1, len) \
 338         APPEND_MATH(SUB, desc, dest, src0, src1, len)
 339 #define append_math_add_c(desc, dest, src0, src1, len) \
 340         APPEND_MATH(ADDC, desc, dest, src0, src1, len)
 341 #define append_math_sub_b(desc, dest, src0, src1, len) \
 342         APPEND_MATH(SUBB, desc, dest, src0, src1, len)
 343 #define append_math_and(desc, dest, src0, src1, len) \
 344         APPEND_MATH(AND, desc, dest, src0, src1, len)
 345 #define append_math_or(desc, dest, src0, src1, len) \
 346         APPEND_MATH(OR, desc, dest, src0, src1, len)
 347 #define append_math_xor(desc, dest, src0, src1, len) \
 348         APPEND_MATH(XOR, desc, dest, src0, src1, len)
 349 #define append_math_lshift(desc, dest, src0, src1, len) \
 350         APPEND_MATH(LSHIFT, desc, dest, src0, src1, len)
 351 #define append_math_rshift(desc, dest, src0, src1, len) \
 352         APPEND_MATH(RSHIFT, desc, dest, src0, src1, len)
 353 #define append_math_ldshift(desc, dest, src0, src1, len) \
 354         APPEND_MATH(SHLD, desc, dest, src0, src1, len)
 355
 356 /* Exactly one source is IMM. Data is passed in as u32 value */
 357 #define APPEND_MATH_IMM_u32(op, desc, dest, src_0, src_1, data) \
 358 do { \
 359         APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ); \
 360         append_cmd(desc, data); \
 361 } while (0)
 362
 363 #define append_math_add_imm_u32(desc, dest, src0, src1, data) \
 364         APPEND_MATH_IMM_u32(ADD, desc, dest, src0, src1, data)
 365 #define append_math_sub_imm_u32(desc, dest, src0, src1, data) \
 366         APPEND_MATH_IMM_u32(SUB, desc, dest, src0, src1, data)
 367 #define append_math_add_c_imm_u32(desc, dest, src0, src1, data) \
 368         APPEND_MATH_IMM_u32(ADDC, desc, dest, src0, src1, data)
 369 #define append_math_sub_b_imm_u32(desc, dest, src0, src1, data) \
 370         APPEND_MATH_IMM_u32(SUBB, desc, dest, src0, src1, data)
 371 #define append_math_and_imm_u32(desc, dest, src0, src1, data) \
 372         APPEND_MATH_IMM_u32(AND, desc, dest, src0, src1, data)
 373 #define append_math_or_imm_u32(desc, dest, src0, src1, data) \
 374         APPEND_MATH_IMM_u32(OR, desc, dest, src0, src1, data)
 375 #define append_math_xor_imm_u32(desc, dest, src0, src1, data) \
 376         APPEND_MATH_IMM_u32(XOR, desc, dest, src0, src1, data)
 377 #define append_math_lshift_imm_u32(desc, dest, src0, src1, data) \
 378         APPEND_MATH_IMM_u32(LSHIFT, desc, dest, src0, src1, data)
 379 #define append_math_rshift_imm_u32(desc, dest, src0, src1, data) \
 380         APPEND_MATH_IMM_u32(RSHIFT, desc, dest, src0, src1, data)
 381
 382 /* Exactly one source is IMM. Data is passed in as u64 value */
 383 #define APPEND_MATH_IMM_u64(op, desc, dest, src_0, src_1, data) \
 384 do { \
 385         u32 upper = (data >> 16) >> 16; \
 386         APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ * 2 | \
 387                     (upper ? 0 : MATH_IFB)); \
 388         if (upper) \
 389                 append_u64(desc, data); \
 390         else \
 391                 append_u32(desc, lower_32_bits(data)); \
 392 } while (0)
 393
 394 #define append_math_add_imm_u64(desc, dest, src0, src1, data) \
 395         APPEND_MATH_IMM_u64(ADD, desc, dest, src0, src1, data)
 396 #define append_math_sub_imm_u64(desc, dest, src0, src1, data) \
 397         APPEND_MATH_IMM_u64(SUB, desc, dest, src0, src1, data)
 398 #define append_math_add_c_imm_u64(desc, dest, src0, src1, data) \
 399         APPEND_MATH_IMM_u64(ADDC, desc, dest, src0, src1, data)
 400 #define append_math_sub_b_imm_u64(desc, dest, src0, src1, data) \
 401         APPEND_MATH_IMM_u64(SUBB, desc, dest, src0, src1, data)
 402 #define append_math_and_imm_u64(desc, dest, src0, src1, data) \
 403         APPEND_MATH_IMM_u64(AND, desc, dest, src0, src1, data)
 404 #define append_math_or_imm_u64(desc, dest, src0, src1, data) \
 405         APPEND_MATH_IMM_u64(OR, desc, dest, src0, src1, data)
 406 #define append_math_xor_imm_u64(desc, dest, src0, src1, data) \
 407         APPEND_MATH_IMM_u64(XOR, desc, dest, src0, src1, data)
 408 #define append_math_lshift_imm_u64(desc, dest, src0, src1, data) \
 409         APPEND_MATH_IMM_u64(LSHIFT, desc, dest, src0, src1, data)
 410 #define append_math_rshift_imm_u64(desc, dest, src0, src1, data) \
 411         APPEND_MATH_IMM_u64(RSHIFT, desc, dest, src0, src1, data)