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 14 #ifdef DEBUG 15 #define PRINT_POS do { printk(KERN_DEBUG "%02d: %s\n", desc_len(desc),\ 16 &__func__[sizeof("append")]); } while (0) 17 #else 18 #define PRINT_POS 19 #endif 20 21 #define SET_OK_NO_PROP_ERRORS (IMMEDIATE | LDST_CLASS_DECO | \ 22 LDST_SRCDST_WORD_DECOCTRL | \ 23 (LDOFF_CHG_SHARE_OK_NO_PROP << \ 24 LDST_OFFSET_SHIFT)) 25 #define DISABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \ 26 LDST_SRCDST_WORD_DECOCTRL | \ 27 (LDOFF_DISABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT)) 28 #define ENABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \ 29 LDST_SRCDST_WORD_DECOCTRL | \ 30 (LDOFF_ENABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT)) 31 32 static inline int desc_len(u32 *desc) 33 { 34 return *desc & HDR_DESCLEN_MASK; 35 } 36 37 static inline int desc_bytes(void *desc) 38 { 39 return desc_len(desc) * CAAM_CMD_SZ; 40 } 41 42 static inline u32 *desc_end(u32 *desc) 43 { 44 return desc + desc_len(desc); 45 } 46 47 static inline void *sh_desc_pdb(u32 *desc) 48 { 49 return desc + 1; 50 } 51 52 static inline void init_desc(u32 *desc, u32 options) 53 { 54 *desc = (options | HDR_ONE) + 1; 55 } 56 57 static inline void init_sh_desc(u32 *desc, u32 options) 58 { 59 PRINT_POS; 60 init_desc(desc, CMD_SHARED_DESC_HDR | options); 61 } 62 63 static inline void init_sh_desc_pdb(u32 *desc, u32 options, size_t pdb_bytes) 64 { 65 u32 pdb_len = (pdb_bytes + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ; 66 67 init_sh_desc(desc, (((pdb_len + 1) << HDR_START_IDX_SHIFT) + pdb_len) | 68 options); 69 } 70 71 static inline void init_job_desc(u32 *desc, u32 options) 72 { 73 init_desc(desc, CMD_DESC_HDR | options); 74 } 75 76 static inline void append_ptr(u32 *desc, dma_addr_t ptr) 77 { 78 dma_addr_t *offset = (dma_addr_t *)desc_end(desc); 79 80 *offset = ptr; 81 82 (*desc) += CAAM_PTR_SZ / CAAM_CMD_SZ; 83 } 84 85 static inline void init_job_desc_shared(u32 *desc, dma_addr_t ptr, int len, 86 u32 options) 87 { 88 PRINT_POS; 89 init_job_desc(desc, HDR_SHARED | options | 90 (len << HDR_START_IDX_SHIFT)); 91 append_ptr(desc, ptr); 92 } 93 94 static inline void append_data(u32 *desc, void *data, int len) 95 { 96 u32 *offset = desc_end(desc); 97 98 if (len) /* avoid sparse warning: memcpy with byte count of 0 */ 99 memcpy(offset, data, len); 100 101 (*desc) += (len + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ; 102 } 103 104 static inline void append_cmd(u32 *desc, u32 command) 105 { 106 u32 *cmd = desc_end(desc); 107 108 *cmd = command; 109 110 (*desc)++; 111 } 112 113 static inline void append_cmd_ptr(u32 *desc, dma_addr_t ptr, int len, 114 u32 command) 115 { 116 append_cmd(desc, command | len); 117 append_ptr(desc, ptr); 118 } 119 120 /* Write length after pointer, rather than inside command */ 121 static inline void append_cmd_ptr_extlen(u32 *desc, dma_addr_t ptr, 122 unsigned int len, u32 command) 123 { 124 append_cmd(desc, command); 125 append_ptr(desc, ptr); 126 append_cmd(desc, len); 127 } 128 129 static inline void append_cmd_data(u32 *desc, void *data, int len, 130 u32 command) 131 { 132 append_cmd(desc, command | IMMEDIATE | len); 133 append_data(desc, data, len); 134 } 135 136 static inline u32 *append_jump(u32 *desc, u32 options) 137 { 138 u32 *cmd = desc_end(desc); 139 140 PRINT_POS; 141 append_cmd(desc, CMD_JUMP | options); 142 143 return cmd; 144 } 145 146 static inline void set_jump_tgt_here(u32 *desc, u32 *jump_cmd) 147 { 148 *jump_cmd = *jump_cmd | (desc_len(desc) - (jump_cmd - desc)); 149 } 150 151 #define APPEND_CMD(cmd, op) \ 152 static inline void append_##cmd(u32 *desc, u32 options) \ 153 { \ 154 PRINT_POS; \ 155 append_cmd(desc, CMD_##op | options); \ 156 } 157 APPEND_CMD(operation, OPERATION) 158 APPEND_CMD(move, MOVE) 159 160 #define APPEND_CMD_LEN(cmd, op) \ 161 static inline void append_##cmd(u32 *desc, unsigned int len, u32 options) \ 162 { \ 163 PRINT_POS; \ 164 append_cmd(desc, CMD_##op | len | options); \ 165 } 166 APPEND_CMD_LEN(seq_store, SEQ_STORE) 167 APPEND_CMD_LEN(seq_fifo_load, SEQ_FIFO_LOAD) 168 APPEND_CMD_LEN(seq_fifo_store, SEQ_FIFO_STORE) 169 170 #define APPEND_CMD_PTR(cmd, op) \ 171 static inline void append_##cmd(u32 *desc, dma_addr_t ptr, unsigned int len, \ 172 u32 options) \ 173 { \ 174 PRINT_POS; \ 175 append_cmd_ptr(desc, ptr, len, CMD_##op | options); \ 176 } 177 APPEND_CMD_PTR(key, KEY) 178 APPEND_CMD_PTR(load, LOAD) 179 APPEND_CMD_PTR(store, STORE) 180 APPEND_CMD_PTR(fifo_load, FIFO_LOAD) 181 APPEND_CMD_PTR(fifo_store, FIFO_STORE) 182 183 #define APPEND_SEQ_PTR_INTLEN(cmd, op) \ 184 static inline void append_seq_##cmd##_ptr_intlen(u32 *desc, dma_addr_t ptr, \ 185 unsigned int len, \ 186 u32 options) \ 187 { \ 188 PRINT_POS; \ 189 append_cmd_ptr(desc, ptr, len, CMD_SEQ_##op##_PTR | options); \ 190 } 191 APPEND_SEQ_PTR_INTLEN(in, IN) 192 APPEND_SEQ_PTR_INTLEN(out, OUT) 193 194 #define APPEND_CMD_PTR_TO_IMM(cmd, op) \ 195 static inline void append_##cmd##_as_imm(u32 *desc, void *data, \ 196 unsigned int len, u32 options) \ 197 { \ 198 PRINT_POS; \ 199 append_cmd_data(desc, data, len, CMD_##op | options); \ 200 } 201 APPEND_CMD_PTR_TO_IMM(load, LOAD); 202 APPEND_CMD_PTR_TO_IMM(fifo_load, FIFO_LOAD); 203 204 #define APPEND_CMD_PTR_EXTLEN(cmd, op) \ 205 static inline void append_##cmd##_extlen(u32 *desc, dma_addr_t ptr, \ 206 unsigned int len, u32 options) \ 207 { \ 208 PRINT_POS; \ 209 append_cmd_ptr_extlen(desc, ptr, len, CMD_##op | SQIN_EXT | options); \ 210 } 211 APPEND_CMD_PTR_EXTLEN(seq_in_ptr, SEQ_IN_PTR) 212 APPEND_CMD_PTR_EXTLEN(seq_out_ptr, SEQ_OUT_PTR) 213 214 /* 215 * Determine whether to store length internally or externally depending on 216 * the size of its type 217 */ 218 #define APPEND_CMD_PTR_LEN(cmd, op, type) \ 219 static inline void append_##cmd(u32 *desc, dma_addr_t ptr, \ 220 type len, u32 options) \ 221 { \ 222 PRINT_POS; \ 223 if (sizeof(type) > sizeof(u16)) \ 224 append_##cmd##_extlen(desc, ptr, len, options); \ 225 else \ 226 append_##cmd##_intlen(desc, ptr, len, options); \ 227 } 228 APPEND_CMD_PTR_LEN(seq_in_ptr, SEQ_IN_PTR, u32) 229 APPEND_CMD_PTR_LEN(seq_out_ptr, SEQ_OUT_PTR, u32) 230 231 /* 232 * 2nd variant for commands whose specified immediate length differs 233 * from length of immediate data provided, e.g., split keys 234 */ 235 #define APPEND_CMD_PTR_TO_IMM2(cmd, op) \ 236 static inline void append_##cmd##_as_imm(u32 *desc, void *data, \ 237 unsigned int data_len, \ 238 unsigned int len, u32 options) \ 239 { \ 240 PRINT_POS; \ 241 append_cmd(desc, CMD_##op | IMMEDIATE | len | options); \ 242 append_data(desc, data, data_len); \ 243 } 244 APPEND_CMD_PTR_TO_IMM2(key, KEY); 245 246 #define APPEND_CMD_RAW_IMM(cmd, op, type) \ 247 static inline void append_##cmd##_imm_##type(u32 *desc, type immediate, \ 248 u32 options) \ 249 { \ 250 PRINT_POS; \ 251 append_cmd(desc, CMD_##op | IMMEDIATE | options | sizeof(type)); \ 252 append_cmd(desc, immediate); \ 253 } 254 APPEND_CMD_RAW_IMM(load, LOAD, u32); 255 256 /* 257 * Append math command. Only the last part of destination and source need to 258 * be specified 259 */ 260 #define APPEND_MATH(op, desc, dest, src_0, src_1, len) \ 261 append_cmd(desc, CMD_MATH | MATH_FUN_##op | MATH_DEST_##dest | \ 262 MATH_SRC0_##src_0 | MATH_SRC1_##src_1 | (u32) (len & MATH_LEN_MASK)); 263 264 #define append_math_add(desc, dest, src0, src1, len) \ 265 APPEND_MATH(ADD, desc, dest, src0, src1, len) 266 #define append_math_sub(desc, dest, src0, src1, len) \ 267 APPEND_MATH(SUB, desc, dest, src0, src1, len) 268 #define append_math_add_c(desc, dest, src0, src1, len) \ 269 APPEND_MATH(ADDC, desc, dest, src0, src1, len) 270 #define append_math_sub_b(desc, dest, src0, src1, len) \ 271 APPEND_MATH(SUBB, desc, dest, src0, src1, len) 272 #define append_math_and(desc, dest, src0, src1, len) \ 273 APPEND_MATH(AND, desc, dest, src0, src1, len) 274 #define append_math_or(desc, dest, src0, src1, len) \ 275 APPEND_MATH(OR, desc, dest, src0, src1, len) 276 #define append_math_xor(desc, dest, src0, src1, len) \ 277 APPEND_MATH(XOR, desc, dest, src0, src1, len) 278 #define append_math_lshift(desc, dest, src0, src1, len) \ 279 APPEND_MATH(LSHIFT, desc, dest, src0, src1, len) 280 #define append_math_rshift(desc, dest, src0, src1, len) \ 281 APPEND_MATH(RSHIFT, desc, dest, src0, src1, len) 282 283 /* Exactly one source is IMM. Data is passed in as u32 value */ 284 #define APPEND_MATH_IMM_u32(op, desc, dest, src_0, src_1, data) \ 285 do { \ 286 APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ); \ 287 append_cmd(desc, data); \ 288 } while (0); 289 290 #define append_math_add_imm_u32(desc, dest, src0, src1, data) \ 291 APPEND_MATH_IMM_u32(ADD, desc, dest, src0, src1, data) 292 #define append_math_sub_imm_u32(desc, dest, src0, src1, data) \ 293 APPEND_MATH_IMM_u32(SUB, desc, dest, src0, src1, data) 294 #define append_math_add_c_imm_u32(desc, dest, src0, src1, data) \ 295 APPEND_MATH_IMM_u32(ADDC, desc, dest, src0, src1, data) 296 #define append_math_sub_b_imm_u32(desc, dest, src0, src1, data) \ 297 APPEND_MATH_IMM_u32(SUBB, desc, dest, src0, src1, data) 298 #define append_math_and_imm_u32(desc, dest, src0, src1, data) \ 299 APPEND_MATH_IMM_u32(AND, desc, dest, src0, src1, data) 300 #define append_math_or_imm_u32(desc, dest, src0, src1, data) \ 301 APPEND_MATH_IMM_u32(OR, desc, dest, src0, src1, data) 302 #define append_math_xor_imm_u32(desc, dest, src0, src1, data) \ 303 APPEND_MATH_IMM_u32(XOR, desc, dest, src0, src1, data) 304 #define append_math_lshift_imm_u32(desc, dest, src0, src1, data) \ 305 APPEND_MATH_IMM_u32(LSHIFT, desc, dest, src0, src1, data) 306 #define append_math_rshift_imm_u32(desc, dest, src0, src1, data) \ 307 APPEND_MATH_IMM_u32(RSHIFT, desc, dest, src0, src1, data) 308