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 * ee - endianness 329 * size - size of immediate type in bytes 330 */ 331 #define APPEND_CMD_RAW_IMM2(cmd, op, ee, size) \ 332 static inline void append_##cmd##_imm_##ee##size(u32 *desc, \ 333 u##size immediate, \ 334 u32 options) \ 335 { \ 336 __##ee##size data = cpu_to_##ee##size(immediate); \ 337 PRINT_POS; \ 338 append_cmd(desc, CMD_##op | IMMEDIATE | options | sizeof(data)); \ 339 append_data(desc, &data, sizeof(data)); \ 340 } 341 342 APPEND_CMD_RAW_IMM2(load, LOAD, be, 32); 343 344 /* 345 * Append math command. Only the last part of destination and source need to 346 * be specified 347 */ 348 #define APPEND_MATH(op, desc, dest, src_0, src_1, len) \ 349 append_cmd(desc, CMD_MATH | MATH_FUN_##op | MATH_DEST_##dest | \ 350 MATH_SRC0_##src_0 | MATH_SRC1_##src_1 | (u32)len); 351 352 #define append_math_add(desc, dest, src0, src1, len) \ 353 APPEND_MATH(ADD, desc, dest, src0, src1, len) 354 #define append_math_sub(desc, dest, src0, src1, len) \ 355 APPEND_MATH(SUB, desc, dest, src0, src1, len) 356 #define append_math_add_c(desc, dest, src0, src1, len) \ 357 APPEND_MATH(ADDC, desc, dest, src0, src1, len) 358 #define append_math_sub_b(desc, dest, src0, src1, len) \ 359 APPEND_MATH(SUBB, desc, dest, src0, src1, len) 360 #define append_math_and(desc, dest, src0, src1, len) \ 361 APPEND_MATH(AND, desc, dest, src0, src1, len) 362 #define append_math_or(desc, dest, src0, src1, len) \ 363 APPEND_MATH(OR, desc, dest, src0, src1, len) 364 #define append_math_xor(desc, dest, src0, src1, len) \ 365 APPEND_MATH(XOR, desc, dest, src0, src1, len) 366 #define append_math_lshift(desc, dest, src0, src1, len) \ 367 APPEND_MATH(LSHIFT, desc, dest, src0, src1, len) 368 #define append_math_rshift(desc, dest, src0, src1, len) \ 369 APPEND_MATH(RSHIFT, desc, dest, src0, src1, len) 370 #define append_math_ldshift(desc, dest, src0, src1, len) \ 371 APPEND_MATH(SHLD, desc, dest, src0, src1, len) 372 373 /* Exactly one source is IMM. Data is passed in as u32 value */ 374 #define APPEND_MATH_IMM_u32(op, desc, dest, src_0, src_1, data) \ 375 do { \ 376 APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ); \ 377 append_cmd(desc, data); \ 378 } while (0) 379 380 #define append_math_add_imm_u32(desc, dest, src0, src1, data) \ 381 APPEND_MATH_IMM_u32(ADD, desc, dest, src0, src1, data) 382 #define append_math_sub_imm_u32(desc, dest, src0, src1, data) \ 383 APPEND_MATH_IMM_u32(SUB, desc, dest, src0, src1, data) 384 #define append_math_add_c_imm_u32(desc, dest, src0, src1, data) \ 385 APPEND_MATH_IMM_u32(ADDC, desc, dest, src0, src1, data) 386 #define append_math_sub_b_imm_u32(desc, dest, src0, src1, data) \ 387 APPEND_MATH_IMM_u32(SUBB, desc, dest, src0, src1, data) 388 #define append_math_and_imm_u32(desc, dest, src0, src1, data) \ 389 APPEND_MATH_IMM_u32(AND, desc, dest, src0, src1, data) 390 #define append_math_or_imm_u32(desc, dest, src0, src1, data) \ 391 APPEND_MATH_IMM_u32(OR, desc, dest, src0, src1, data) 392 #define append_math_xor_imm_u32(desc, dest, src0, src1, data) \ 393 APPEND_MATH_IMM_u32(XOR, desc, dest, src0, src1, data) 394 #define append_math_lshift_imm_u32(desc, dest, src0, src1, data) \ 395 APPEND_MATH_IMM_u32(LSHIFT, desc, dest, src0, src1, data) 396 #define append_math_rshift_imm_u32(desc, dest, src0, src1, data) \ 397 APPEND_MATH_IMM_u32(RSHIFT, desc, dest, src0, src1, data) 398 399 /* Exactly one source is IMM. Data is passed in as u64 value */ 400 #define APPEND_MATH_IMM_u64(op, desc, dest, src_0, src_1, data) \ 401 do { \ 402 u32 upper = (data >> 16) >> 16; \ 403 APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ * 2 | \ 404 (upper ? 0 : MATH_IFB)); \ 405 if (upper) \ 406 append_u64(desc, data); \ 407 else \ 408 append_u32(desc, lower_32_bits(data)); \ 409 } while (0) 410 411 #define append_math_add_imm_u64(desc, dest, src0, src1, data) \ 412 APPEND_MATH_IMM_u64(ADD, desc, dest, src0, src1, data) 413 #define append_math_sub_imm_u64(desc, dest, src0, src1, data) \ 414 APPEND_MATH_IMM_u64(SUB, desc, dest, src0, src1, data) 415 #define append_math_add_c_imm_u64(desc, dest, src0, src1, data) \ 416 APPEND_MATH_IMM_u64(ADDC, desc, dest, src0, src1, data) 417 #define append_math_sub_b_imm_u64(desc, dest, src0, src1, data) \ 418 APPEND_MATH_IMM_u64(SUBB, desc, dest, src0, src1, data) 419 #define append_math_and_imm_u64(desc, dest, src0, src1, data) \ 420 APPEND_MATH_IMM_u64(AND, desc, dest, src0, src1, data) 421 #define append_math_or_imm_u64(desc, dest, src0, src1, data) \ 422 APPEND_MATH_IMM_u64(OR, desc, dest, src0, src1, data) 423 #define append_math_xor_imm_u64(desc, dest, src0, src1, data) \ 424 APPEND_MATH_IMM_u64(XOR, desc, dest, src0, src1, data) 425 #define append_math_lshift_imm_u64(desc, dest, src0, src1, data) \ 426 APPEND_MATH_IMM_u64(LSHIFT, desc, dest, src0, src1, data) 427 #define append_math_rshift_imm_u64(desc, dest, src0, src1, data) \ 428 APPEND_MATH_IMM_u64(RSHIFT, desc, dest, src0, src1, data) 429