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 * 64)
  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 DISABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \
  22                                 LDST_SRCDST_WORD_DECOCTRL | \
  23                                 (LDOFF_DISABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))
  24 #define ENABLE_AUTO_INFO_FIFO (IMMEDIATE | LDST_CLASS_DECO | \
  25                                LDST_SRCDST_WORD_DECOCTRL | \
  26                                (LDOFF_ENABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))
  27
  28 static inline int desc_len(u32 *desc)
  29 {
  30         return *desc & HDR_DESCLEN_MASK;
  31 }
  32
  33 static inline int desc_bytes(void *desc)
  34 {
  35         return desc_len(desc) * CAAM_CMD_SZ;
  36 }
  37
  38 static inline u32 *desc_end(u32 *desc)
  39 {
  40         return desc + desc_len(desc);
  41 }
  42
  43 static inline void *sh_desc_pdb(u32 *desc)
  44 {
  45         return desc + 1;
  46 }
  47
  48 static inline void init_desc(u32 *desc, u32 options)
  49 {
  50         *desc = options | HDR_ONE | 1;
  51 }
  52
  53 static inline void init_sh_desc(u32 *desc, u32 options)
  54 {
  55         PRINT_POS;
  56         init_desc(desc, CMD_SHARED_DESC_HDR | options);
  57 }
  58
  59 static inline void init_sh_desc_pdb(u32 *desc, u32 options, size_t pdb_bytes)
  60 {
  61         u32 pdb_len = pdb_bytes / CAAM_CMD_SZ + 1;
  62
  63         init_sh_desc(desc, ((pdb_len << HDR_START_IDX_SHIFT) + pdb_len) |
  64                      options);
  65 }
  66
  67 static inline void init_job_desc(u32 *desc, u32 options)
  68 {
  69         init_desc(desc, CMD_DESC_HDR | options);
  70 }
  71
  72 static inline void append_ptr(u32 *desc, dma_addr_t ptr)
  73 {
  74         dma_addr_t *offset = (dma_addr_t *)desc_end(desc);
  75
  76         *offset = ptr;
  77
  78         (*desc) += CAAM_PTR_SZ / CAAM_CMD_SZ;
  79 }
  80
  81 static inline void init_job_desc_shared(u32 *desc, dma_addr_t ptr, int len,
  82                                         u32 options)
  83 {
  84         PRINT_POS;
  85         init_job_desc(desc, HDR_SHARED | options |
  86                       (len << HDR_START_IDX_SHIFT));
  87         append_ptr(desc, ptr);
  88 }
  89
  90 static inline void append_data(u32 *desc, void *data, int len)
  91 {
  92         u32 *offset = desc_end(desc);
  93
  94         if (len) /* avoid sparse warning: memcpy with byte count of 0 */
  95                 memcpy(offset, data, len);
  96
  97         (*desc) += (len + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ;
  98 }
  99
 100 static inline void append_cmd(u32 *desc, u32 command)
 101 {
 102         u32 *cmd = desc_end(desc);
 103
 104         *cmd = command;
 105
 106         (*desc)++;
 107 }
 108
 109 static inline void append_cmd_ptr(u32 *desc, dma_addr_t ptr, int len,
 110                                   u32 command)
 111 {
 112         append_cmd(desc, command | len);
 113         append_ptr(desc, ptr);
 114 }
 115
 116 static inline void append_cmd_data(u32 *desc, void *data, int len,
 117                                    u32 command)
 118 {
 119         append_cmd(desc, command | IMMEDIATE | len);
 120         append_data(desc, data, len);
 121 }
 122
 123 static inline u32 *append_jump(u32 *desc, u32 options)
 124 {
 125         u32 *cmd = desc_end(desc);
 126
 127         PRINT_POS;
 128         append_cmd(desc, CMD_JUMP | options);
 129
 130         return cmd;
 131 }
 132
 133 static inline void set_jump_tgt_here(u32 *desc, u32 *jump_cmd)
 134 {
 135         *jump_cmd = *jump_cmd | (desc_len(desc) - (jump_cmd - desc));
 136 }
 137
 138 #define APPEND_CMD(cmd, op) \
 139 static inline void append_##cmd(u32 *desc, u32 options) \
 140 { \
 141         PRINT_POS; \
 142         append_cmd(desc, CMD_##op | options); \
 143 }
 144 APPEND_CMD(operation, OPERATION)
 145 APPEND_CMD(move, MOVE)
 146
 147 #define APPEND_CMD_LEN(cmd, op) \
 148 static inline void append_##cmd(u32 *desc, unsigned int len, u32 options) \
 149 { \
 150         PRINT_POS; \
 151         append_cmd(desc, CMD_##op | len | options); \
 152 }
 153 APPEND_CMD_LEN(seq_store, SEQ_STORE)
 154 APPEND_CMD_LEN(seq_fifo_load, SEQ_FIFO_LOAD)
 155 APPEND_CMD_LEN(seq_fifo_store, SEQ_FIFO_STORE)
 156
 157 #define APPEND_CMD_PTR(cmd, op) \
 158 static inline void append_##cmd(u32 *desc, dma_addr_t ptr, unsigned int len, \
 159                                 u32 options) \
 160 { \
 161         PRINT_POS; \
 162         append_cmd_ptr(desc, ptr, len, CMD_##op | options); \
 163 }
 164 APPEND_CMD_PTR(key, KEY)
 165 APPEND_CMD_PTR(seq_in_ptr, SEQ_IN_PTR)
 166 APPEND_CMD_PTR(seq_out_ptr, SEQ_OUT_PTR)
 167 APPEND_CMD_PTR(load, LOAD)
 168 APPEND_CMD_PTR(store, STORE)
 169 APPEND_CMD_PTR(fifo_load, FIFO_LOAD)
 170 APPEND_CMD_PTR(fifo_store, FIFO_STORE)
 171
 172 #define APPEND_CMD_PTR_TO_IMM(cmd, op) \
 173 static inline void append_##cmd##_as_imm(u32 *desc, void *data, \
 174                                          unsigned int len, u32 options) \
 175 { \
 176         PRINT_POS; \
 177         append_cmd_data(desc, data, len, CMD_##op | options); \
 178 }
 179 APPEND_CMD_PTR_TO_IMM(load, LOAD);
 180 APPEND_CMD_PTR_TO_IMM(fifo_load, FIFO_LOAD);
 181
 182 /*
 183  * 2nd variant for commands whose specified immediate length differs
 184  * from length of immediate data provided, e.g., split keys
 185  */
 186 #define APPEND_CMD_PTR_TO_IMM2(cmd, op) \
 187 static inline void append_##cmd##_as_imm(u32 *desc, void *data, \
 188                                          unsigned int data_len, \
 189                                          unsigned int len, u32 options) \
 190 { \
 191         PRINT_POS; \
 192         append_cmd(desc, CMD_##op | IMMEDIATE | len | options); \
 193         append_data(desc, data, data_len); \
 194 }
 195 APPEND_CMD_PTR_TO_IMM2(key, KEY);
 196
 197 #define APPEND_CMD_RAW_IMM(cmd, op, type) \
 198 static inline void append_##cmd##_imm_##type(u32 *desc, type immediate, \
 199                                              u32 options) \
 200 { \
 201         PRINT_POS; \
 202         append_cmd(desc, CMD_##op | IMMEDIATE | options | sizeof(type)); \
 203         append_cmd(desc, immediate); \
 204 }
 205 APPEND_CMD_RAW_IMM(load, LOAD, u32);