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_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)