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