1/* 2 * caam descriptor construction helper functions 3 * 4 * Copyright 2008-2011 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 32static inline int desc_len(u32 *desc) 33{ 34 return *desc & HDR_DESCLEN_MASK; 35} 36 37static inline int desc_bytes(void *desc) 38{ 39 return desc_len(desc) * CAAM_CMD_SZ; 40} 41 42static inline u32 *desc_end(u32 *desc) 43{ 44 return desc + desc_len(desc); 45} 46 47static inline void *sh_desc_pdb(u32 *desc) 48{ 49 return desc + 1; 50} 51 52static inline void init_desc(u32 *desc, u32 options) 53{ 54 *desc = options | HDR_ONE | 1; 55} 56 57static inline void init_sh_desc(u32 *desc, u32 options) 58{ 59 PRINT_POS; 60 init_desc(desc, CMD_SHARED_DESC_HDR | options); 61} 62 63static 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; 66 67 init_sh_desc(desc, ((pdb_len << HDR_START_IDX_SHIFT) + pdb_len) | 68 options); 69} 70 71static inline void init_job_desc(u32 *desc, u32 options) 72{ 73 init_desc(desc, CMD_DESC_HDR | options); 74} 75 76static 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 85static 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 94static 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 104static inline void append_cmd(u32 *desc, u32 command) 105{ 106 u32 *cmd = desc_end(desc); 107 108 *cmd = command; 109 110 (*desc)++; 111} 112 113static 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 120static inline void append_cmd_data(u32 *desc, void *data, int len, 121 u32 command) 122{ 123 append_cmd(desc, command | IMMEDIATE | len); 124 append_data(desc, data, len); 125} 126 127static inline u32 *append_jump(u32 *desc, u32 options) 128{ 129 u32 *cmd = desc_end(desc); 130 131 PRINT_POS; 132 append_cmd(desc, CMD_JUMP | options); 133 134 return cmd; 135} 136 137static inline void set_jump_tgt_here(u32 *desc, u32 *jump_cmd) 138{ 139 *jump_cmd = *jump_cmd | (desc_len(desc) - (jump_cmd - desc)); 140} 141 142#define APPEND_CMD(cmd, op) \ 143static inline void append_##cmd(u32 *desc, u32 options) \ 144{ \ 145 PRINT_POS; \ 146 append_cmd(desc, CMD_##op | options); \ 147} 148APPEND_CMD(operation, OPERATION) 149APPEND_CMD(move, MOVE) 150 151#define APPEND_CMD_LEN(cmd, op) \ 152static inline void append_##cmd(u32 *desc, unsigned int len, u32 options) \ 153{ \ 154 PRINT_POS; \ 155 append_cmd(desc, CMD_##op | len | options); \ 156} 157APPEND_CMD_LEN(seq_store, SEQ_STORE) 158APPEND_CMD_LEN(seq_fifo_load, SEQ_FIFO_LOAD) 159APPEND_CMD_LEN(seq_fifo_store, SEQ_FIFO_STORE) 160 161#define APPEND_CMD_PTR(cmd, op) \ 162static inline void append_##cmd(u32 *desc, dma_addr_t ptr, unsigned int len, \ 163 u32 options) \ 164{ \ 165 PRINT_POS; \ 166 append_cmd_ptr(desc, ptr, len, CMD_##op | options); \ 167} 168APPEND_CMD_PTR(key, KEY) 169APPEND_CMD_PTR(seq_in_ptr, SEQ_IN_PTR) 170APPEND_CMD_PTR(seq_out_ptr, SEQ_OUT_PTR) 171APPEND_CMD_PTR(load, LOAD) 172APPEND_CMD_PTR(store, STORE) 173APPEND_CMD_PTR(fifo_load, FIFO_LOAD) 174APPEND_CMD_PTR(fifo_store, FIFO_STORE) 175 176#define APPEND_CMD_PTR_TO_IMM(cmd, op) \ 177static inline void append_##cmd##_as_imm(u32 *desc, void *data, \ 178 unsigned int len, u32 options) \ 179{ \ 180 PRINT_POS; \ 181 append_cmd_data(desc, data, len, CMD_##op | options); \ 182} 183APPEND_CMD_PTR_TO_IMM(load, LOAD); 184APPEND_CMD_PTR_TO_IMM(fifo_load, FIFO_LOAD); 185 186/* 187 * 2nd variant for commands whose specified immediate length differs 188 * from length of immediate data provided, e.g., split keys 189 */ 190#define APPEND_CMD_PTR_TO_IMM2(cmd, op) \ 191static inline void append_##cmd##_as_imm(u32 *desc, void *data, \ 192 unsigned int data_len, \ 193 unsigned int len, u32 options) \ 194{ \ 195 PRINT_POS; \ 196 append_cmd(desc, CMD_##op | IMMEDIATE | len | options); \ 197 append_data(desc, data, data_len); \ 198} 199APPEND_CMD_PTR_TO_IMM2(key, KEY); 200 201#define APPEND_CMD_RAW_IMM(cmd, op, type) \ 202static inline void append_##cmd##_imm_##type(u32 *desc, type immediate, \ 203 u32 options) \ 204{ \ 205 PRINT_POS; \ 206 append_cmd(desc, CMD_##op | IMMEDIATE | options | sizeof(type)); \ 207 append_cmd(desc, immediate); \ 208} 209APPEND_CMD_RAW_IMM(load, LOAD, u32); 210 211/* 212 * Append math command. Only the last part of destination and source need to 213 * be specified 214 */ 215#define APPEND_MATH(op, desc, dest, src_0, src_1, len) \ 216append_cmd(desc, CMD_MATH | MATH_FUN_##op | MATH_DEST_##dest | \ 217 MATH_SRC0_##src_0 | MATH_SRC1_##src_1 | (u32) (len & MATH_LEN_MASK)); 218 219#define append_math_add(desc, dest, src0, src1, len) \ 220 APPEND_MATH(ADD, desc, dest, src0, src1, len) 221#define append_math_sub(desc, dest, src0, src1, len) \ 222 APPEND_MATH(SUB, desc, dest, src0, src1, len) 223#define append_math_add_c(desc, dest, src0, src1, len) \ 224 APPEND_MATH(ADDC, desc, dest, src0, src1, len) 225#define append_math_sub_b(desc, dest, src0, src1, len) \ 226 APPEND_MATH(SUBB, desc, dest, src0, src1, len) 227#define append_math_and(desc, dest, src0, src1, len) \ 228 APPEND_MATH(AND, desc, dest, src0, src1, len) 229#define append_math_or(desc, dest, src0, src1, len) \ 230 APPEND_MATH(OR, desc, dest, src0, src1, len) 231#define append_math_xor(desc, dest, src0, src1, len) \ 232 APPEND_MATH(XOR, desc, dest, src0, src1, len) 233#define append_math_lshift(desc, dest, src0, src1, len) \ 234 APPEND_MATH(LSHIFT, desc, dest, src0, src1, len) 235#define append_math_rshift(desc, dest, src0, src1, len) \ 236 APPEND_MATH(RSHIFT, desc, dest, src0, src1, len) 237 238/* Exactly one source is IMM. Data is passed in as u32 value */ 239#define APPEND_MATH_IMM_u32(op, desc, dest, src_0, src_1, data) \ 240do { \ 241 APPEND_MATH(op, desc, dest, src_0, src_1, CAAM_CMD_SZ); \ 242 append_cmd(desc, data); \ 243} while (0); 244 245#define append_math_add_imm_u32(desc, dest, src0, src1, data) \ 246 APPEND_MATH_IMM_u32(ADD, desc, dest, src0, src1, data) 247#define append_math_sub_imm_u32(desc, dest, src0, src1, data) \ 248 APPEND_MATH_IMM_u32(SUB, desc, dest, src0, src1, data) 249#define append_math_add_c_imm_u32(desc, dest, src0, src1, data) \ 250 APPEND_MATH_IMM_u32(ADDC, desc, dest, src0, src1, data) 251#define append_math_sub_b_imm_u32(desc, dest, src0, src1, data) \ 252 APPEND_MATH_IMM_u32(SUBB, desc, dest, src0, src1, data) 253#define append_math_and_imm_u32(desc, dest, src0, src1, data) \ 254 APPEND_MATH_IMM_u32(AND, desc, dest, src0, src1, data) 255#define append_math_or_imm_u32(desc, dest, src0, src1, data) \ 256 APPEND_MATH_IMM_u32(OR, desc, dest, src0, src1, data) 257#define append_math_xor_imm_u32(desc, dest, src0, src1, data) \ 258 APPEND_MATH_IMM_u32(XOR, desc, dest, src0, src1, data) 259#define append_math_lshift_imm_u32(desc, dest, src0, src1, data) \ 260 APPEND_MATH_IMM_u32(LSHIFT, desc, dest, src0, src1, data) 261#define append_math_rshift_imm_u32(desc, dest, src0, src1, data) \ 262 APPEND_MATH_IMM_u32(RSHIFT, desc, dest, src0, src1, data) 263