ceph/src/crypto/isa-l/isa-l_crypto/md5_mb/md5_ctx_avx2.c

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  29
  30 #include "md5_mb.h"
  31 #include "memcpy_inline.h"
  32
  33 #ifdef _MSC_VER
  34 #include <intrin.h>
  35 #define inline __inline
  36 #endif
  37
  38 static inline void hash_init_digest(MD5_WORD_T * digest);
  39 static inline uint32_t hash_pad(uint8_t padblock[MD5_BLOCK_SIZE * 2], uint32_t total_len);
  40 static MD5_HASH_CTX *md5_ctx_mgr_resubmit(MD5_HASH_CTX_MGR * mgr, MD5_HASH_CTX * ctx);
  41
  42 void md5_ctx_mgr_init_avx2(MD5_HASH_CTX_MGR * mgr)
  43 {
  44         md5_mb_mgr_init_avx2(&mgr->mgr);
  45 }
  46
  47 MD5_HASH_CTX *md5_ctx_mgr_submit_avx2(MD5_HASH_CTX_MGR * mgr, MD5_HASH_CTX * ctx,
  48                                       const void *buffer, uint32_t len, HASH_CTX_FLAG flags)
  49 {
  50         if (flags & (~HASH_ENTIRE)) {
  51                 // User should not pass anything other than FIRST, UPDATE, or LAST
  52                 ctx->error = HASH_CTX_ERROR_INVALID_FLAGS;
  53                 return ctx;
  54         }
  55
  56         if (ctx->status & HASH_CTX_STS_PROCESSING) {
  57                 // Cannot submit to a currently processing job.
  58                 ctx->error = HASH_CTX_ERROR_ALREADY_PROCESSING;
  59                 return ctx;
  60         }
  61
  62         if ((ctx->status & HASH_CTX_STS_COMPLETE) && !(flags & HASH_FIRST)) {
  63                 // Cannot update a finished job.
  64                 ctx->error = HASH_CTX_ERROR_ALREADY_COMPLETED;
  65                 return ctx;
  66         }
  67
  68         if (flags & HASH_FIRST) {
  69                 // Init digest
  70                 hash_init_digest(ctx->job.result_digest);
  71
  72                 // Reset byte counter
  73                 ctx->total_length = 0;
  74
  75                 // Clear extra blocks
  76                 ctx->partial_block_buffer_length = 0;
  77         }
  78         // If we made it here, there were no errors during this call to submit
  79         ctx->error = HASH_CTX_ERROR_NONE;
  80
  81         // Store buffer ptr info from user
  82         ctx->incoming_buffer = buffer;
  83         ctx->incoming_buffer_length = len;
  84
  85         // Store the user's request flags and mark this ctx as currently being processed.
  86         ctx->status = (flags & HASH_LAST) ?
  87             (HASH_CTX_STS) (HASH_CTX_STS_PROCESSING | HASH_CTX_STS_LAST) :
  88             HASH_CTX_STS_PROCESSING;
  89
  90         // Advance byte counter
  91         ctx->total_length += len;
  92
  93         // If there is anything currently buffered in the extra blocks, append to it until it contains a whole block.
  94         // Or if the user's buffer contains less than a whole block, append as much as possible to the extra block.
  95         if ((ctx->partial_block_buffer_length) | (len < MD5_BLOCK_SIZE)) {
  96                 // Compute how many bytes to copy from user buffer into extra block
  97                 uint32_t copy_len = MD5_BLOCK_SIZE - ctx->partial_block_buffer_length;
  98                 if (len < copy_len)
  99                         copy_len = len;
 100
 101                 if (copy_len) {
 102                         // Copy and update relevant pointers and counters
 103                         memcpy_varlen(&ctx->partial_block_buffer
 104                                       [ctx->partial_block_buffer_length], buffer, copy_len);
 105
 106                         ctx->partial_block_buffer_length += copy_len;
 107                         ctx->incoming_buffer = (const void *)((const char *)buffer + copy_len);
 108                         ctx->incoming_buffer_length = len - copy_len;
 109                 }
 110                 // The extra block should never contain more than 1 block here
 111                 assert(ctx->partial_block_buffer_length <= MD5_BLOCK_SIZE);
 112
 113                 // If the extra block buffer contains exactly 1 block, it can be hashed.
 114                 if (ctx->partial_block_buffer_length >= MD5_BLOCK_SIZE) {
 115                         ctx->partial_block_buffer_length = 0;
 116
 117                         ctx->job.buffer = ctx->partial_block_buffer;
 118                         ctx->job.len = 1;
 119                         ctx = (MD5_HASH_CTX *) md5_mb_mgr_submit_avx2(&mgr->mgr, &ctx->job);
 120                 }
 121         }
 122
 123         return md5_ctx_mgr_resubmit(mgr, ctx);
 124 }
 125
 126 MD5_HASH_CTX *md5_ctx_mgr_flush_avx2(MD5_HASH_CTX_MGR * mgr)
 127 {
 128         MD5_HASH_CTX *ctx;
 129
 130         while (1) {
 131                 ctx = (MD5_HASH_CTX *) md5_mb_mgr_flush_avx2(&mgr->mgr);
 132
 133                 // If flush returned 0, there are no more jobs in flight.
 134                 if (!ctx)
 135                         return NULL;
 136
 137                 // If flush returned a job, verify that it is safe to return to the user.
 138                 // If it is not ready, resubmit the job to finish processing.
 139                 ctx = md5_ctx_mgr_resubmit(mgr, ctx);
 140
 141                 // If md5_ctx_mgr_resubmit returned a job, it is ready to be returned.
 142                 if (ctx)
 143                         return ctx;
 144
 145                 // Otherwise, all jobs currently being managed by the HASH_CTX_MGR still need processing. Loop.
 146         }
 147 }
 148
 149 static MD5_HASH_CTX *md5_ctx_mgr_resubmit(MD5_HASH_CTX_MGR * mgr, MD5_HASH_CTX * ctx)
 150 {
 151         while (ctx) {
 152
 153                 if (ctx->status & HASH_CTX_STS_COMPLETE) {
 154                         ctx->status = HASH_CTX_STS_COMPLETE;    // Clear PROCESSING bit
 155                         return ctx;
 156                 }
 157                 // If the extra blocks are empty, begin hashing what remains in the user's buffer.
 158                 if (ctx->partial_block_buffer_length == 0 && ctx->incoming_buffer_length) {
 159                         const void *buffer = ctx->incoming_buffer;
 160                         uint32_t len = ctx->incoming_buffer_length;
 161
 162                         // Only entire blocks can be hashed. Copy remainder to extra blocks buffer.
 163                         uint32_t copy_len = len & (MD5_BLOCK_SIZE - 1);
 164
 165                         if (copy_len) {
 166                                 len -= copy_len;
 167                                 //memcpy(ctx->partial_block_buffer, ((const char*)buffer + len), copy_len);
 168                                 memcpy_varlen(ctx->partial_block_buffer,
 169                                               ((const char *)buffer + len), copy_len);
 170                                 ctx->partial_block_buffer_length = copy_len;
 171                         }
 172
 173                         ctx->incoming_buffer_length = 0;
 174
 175                         // len should be a multiple of the block size now
 176                         assert((len % MD5_BLOCK_SIZE) == 0);
 177
 178                         // Set len to the number of blocks to be hashed in the user's buffer
 179                         len >>= MD5_LOG2_BLOCK_SIZE;
 180
 181                         if (len) {
 182                                 ctx->job.buffer = (uint8_t *) buffer;
 183                                 ctx->job.len = len;
 184                                 ctx = (MD5_HASH_CTX *) md5_mb_mgr_submit_avx2(&mgr->mgr,
 185                                                                               &ctx->job);
 186                                 continue;
 187                         }
 188                 }
 189                 // If the extra blocks are not empty, then we are either on the last block(s)
 190                 // or we need more user input before continuing.
 191                 if (ctx->status & HASH_CTX_STS_LAST) {
 192
 193                         uint8_t *buf = ctx->partial_block_buffer;
 194                         uint32_t n_extra_blocks = hash_pad(buf, ctx->total_length);
 195
 196                         ctx->status =
 197                             (HASH_CTX_STS) (HASH_CTX_STS_PROCESSING | HASH_CTX_STS_COMPLETE);
 198
 199                         ctx->job.buffer = buf;
 200                         ctx->job.len = (uint32_t) n_extra_blocks;
 201                         ctx = (MD5_HASH_CTX *) md5_mb_mgr_submit_avx2(&mgr->mgr, &ctx->job);
 202                         continue;
 203                 }
 204
 205                 if (ctx)
 206                         ctx->status = HASH_CTX_STS_IDLE;
 207                 return ctx;
 208         }
 209
 210         return NULL;
 211 }
 212
 213 static inline void hash_init_digest(MD5_WORD_T * digest)
 214 {
 215         static const MD5_WORD_T hash_initial_digest[MD5_DIGEST_NWORDS] =
 216             { MD5_INITIAL_DIGEST };
 217         //memcpy(digest, hash_initial_digest, sizeof(hash_initial_digest));
 218         memcpy_fixedlen(digest, hash_initial_digest, sizeof(hash_initial_digest));
 219 }
 220
 221 static inline uint32_t hash_pad(uint8_t padblock[MD5_BLOCK_SIZE * 2], uint32_t total_len)
 222 {
 223         uint32_t i = total_len & (MD5_BLOCK_SIZE - 1);
 224
 225         // memset(&padblock[i], 0, MD5_BLOCK_SIZE);
 226         memclr_fixedlen(&padblock[i], MD5_BLOCK_SIZE);
 227         padblock[i] = 0x80;
 228
 229         i += ((MD5_BLOCK_SIZE - 1) & (0 - (total_len + MD5_PADLENGTHFIELD_SIZE + 1))) + 1 +
 230             MD5_PADLENGTHFIELD_SIZE;
 231
 232         *((uint64_t *) & padblock[i - 8]) = ((uint64_t) total_len << 3);
 233
 234         return i >> MD5_LOG2_BLOCK_SIZE;        // Number of extra blocks to hash
 235 }
 236
 237 struct slver {
 238         uint16_t snum;
 239         uint8_t ver;
 240         uint8_t core;
 241 };
 242 struct slver md5_ctx_mgr_init_avx2_slver_04020186;
 243 struct slver md5_ctx_mgr_init_avx2_slver = { 0x0186, 0x02, 0x04 };
 244
 245 struct slver md5_ctx_mgr_submit_avx2_slver_04020187;
 246 struct slver md5_ctx_mgr_submit_avx2_slver = { 0x0187, 0x02, 0x04 };
 247
 248 struct slver md5_ctx_mgr_flush_avx2_slver_04020188;
 249 struct slver md5_ctx_mgr_flush_avx2_slver = { 0x0188, 0x02, 0x04 };