drivers/crypto/caam/desc_constr.h

   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)