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 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; 66 67 init_sh_desc(desc, ((pdb_len << 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 static 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 } 126 127 static 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 } 136 137 static 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) \ 143 static inline void append_##cmd(u32 *desc, u32 options) \ 144 { \ 145 PRINT_POS; \ 146 append_cmd(desc, CMD_##op | options); \ 147 } 148 APPEND_CMD(operation, OPERATION) 149 APPEND_CMD(move, MOVE) 150 151 #define APPEND_CMD_LEN(cmd, op) \ 152 static inline void append_##cmd(u32 *desc, unsigned int len, u32 options) \ 153 { \ 154 PRINT_POS; \ 155 append_cmd(desc, CMD_##op | len | options); \ 156 } 157 APPEND_CMD_LEN(seq_store, SEQ_STORE) 158 APPEND_CMD_LEN(seq_fifo_load, SEQ_FIFO_LOAD) 159 APPEND_CMD_LEN(seq_fifo_store, SEQ_FIFO_STORE) 160 161 #define APPEND_CMD_PTR(cmd, op) \ 162 static 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 } 168 APPEND_CMD_PTR(key, KEY) 169 APPEND_CMD_PTR(seq_in_ptr, SEQ_IN_PTR) 170 APPEND_CMD_PTR(seq_out_ptr, SEQ_OUT_PTR) 171 APPEND_CMD_PTR(load, LOAD) 172 APPEND_CMD_PTR(store, STORE) 173 APPEND_CMD_PTR(fifo_load, FIFO_LOAD) 174 APPEND_CMD_PTR(fifo_store, FIFO_STORE) 175 176 #define APPEND_CMD_PTR_TO_IMM(cmd, op) \ 177 static 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 } 183 APPEND_CMD_PTR_TO_IMM(load, LOAD); 184 APPEND_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) \ 191 static 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 } 199 APPEND_CMD_PTR_TO_IMM2(key, KEY); 200 201 #define APPEND_CMD_RAW_IMM(cmd, op, type) \ 202 static 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 } 209 APPEND_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) \ 216 append_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) \ 240 do { \ 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