crypto: caam/qi - remove ablkcipher IV generation

IV generation is done only at AEAD level. Support in ablkcipher is not needed, thus remove the dead code. Link: https://www.mail-archive.com/search?l=mid&[email protected] Signed-off-by: Horia Geantă <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
mrcsosa · Sep 4, 2018 · aec48ad · aec48ad
1 parent cf5448b
commit aec48ad
Show file tree

Hide file tree

Showing 4 changed files with 20 additions and 327 deletions.
diff --git a/drivers/crypto/caam/caamalg_desc.c b/drivers/crypto/caam/caamalg_desc.c
@@ -1358,87 +1358,6 @@ void cnstr_shdsc_ablkcipher_decap(u32 * const desc, struct alginfo *cdata,
 }
 EXPORT_SYMBOL(cnstr_shdsc_ablkcipher_decap);
 
-/**
- * cnstr_shdsc_ablkcipher_givencap - ablkcipher encapsulation shared descriptor
- *                                   with HW-generated initialization vector.
- * @desc: pointer to buffer used for descriptor construction
- * @cdata: pointer to block cipher transform definitions
- *         Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
- *         with OP_ALG_AAI_CBC.
- * @ivsize: initialization vector size
- * @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
- * @ctx1_iv_off: IV offset in CONTEXT1 register
- */
-void cnstr_shdsc_ablkcipher_givencap(u32 * const desc, struct alginfo *cdata,
-				     unsigned int ivsize, const bool is_rfc3686,
-				     const u32 ctx1_iv_off)
-{
-	u32 *key_jump_cmd, geniv;
-
-	init_sh_desc(desc, HDR_SHARE_SERIAL | HDR_SAVECTX);
-	/* Skip if already shared */
-	key_jump_cmd = append_jump(desc, JUMP_JSL | JUMP_TEST_ALL |
-				   JUMP_COND_SHRD);
-
-	/* Load class1 key only */
-	append_key_as_imm(desc, cdata->key_virt, cdata->keylen,
-			  cdata->keylen, CLASS_1 | KEY_DEST_CLASS_REG);
-
-	/* Load Nonce into CONTEXT1 reg */
-	if (is_rfc3686) {
-		const u8 *nonce = cdata->key_virt + cdata->keylen;
-
-		append_load_as_imm(desc, nonce, CTR_RFC3686_NONCE_SIZE,
-				   LDST_CLASS_IND_CCB |
-				   LDST_SRCDST_BYTE_OUTFIFO | LDST_IMM);
-		append_move(desc, MOVE_WAITCOMP | MOVE_SRC_OUTFIFO |
-			    MOVE_DEST_CLASS1CTX | (16 << MOVE_OFFSET_SHIFT) |
-			    (CTR_RFC3686_NONCE_SIZE << MOVE_LEN_SHIFT));
-	}
-	set_jump_tgt_here(desc, key_jump_cmd);
-
-	/* Generate IV */
-	geniv = NFIFOENTRY_STYPE_PAD | NFIFOENTRY_DEST_DECO |
-		NFIFOENTRY_DTYPE_MSG | NFIFOENTRY_LC1 | NFIFOENTRY_PTYPE_RND |
-		(ivsize << NFIFOENTRY_DLEN_SHIFT);
-	append_load_imm_u32(desc, geniv, LDST_CLASS_IND_CCB |
-			    LDST_SRCDST_WORD_INFO_FIFO | LDST_IMM);
-	append_cmd(desc, CMD_LOAD | DISABLE_AUTO_INFO_FIFO);
-	append_move(desc, MOVE_WAITCOMP | MOVE_SRC_INFIFO |
-		    MOVE_DEST_CLASS1CTX | (ivsize << MOVE_LEN_SHIFT) |
-		    (ctx1_iv_off << MOVE_OFFSET_SHIFT));
-	append_cmd(desc, CMD_LOAD | ENABLE_AUTO_INFO_FIFO);
-
-	/* Copy generated IV to memory */
-	append_seq_store(desc, ivsize, LDST_SRCDST_BYTE_CONTEXT |
-			 LDST_CLASS_1_CCB | (ctx1_iv_off << LDST_OFFSET_SHIFT));
-
-	/* Load Counter into CONTEXT1 reg */
-	if (is_rfc3686)
-		append_load_imm_be32(desc, 1, LDST_IMM | LDST_CLASS_1_CCB |
-				     LDST_SRCDST_BYTE_CONTEXT |
-				     ((ctx1_iv_off + CTR_RFC3686_IV_SIZE) <<
-				      LDST_OFFSET_SHIFT));
-
-	if (ctx1_iv_off)
-		append_jump(desc, JUMP_JSL | JUMP_TEST_ALL | JUMP_COND_NCP |
-			    (1 << JUMP_OFFSET_SHIFT));
-
-	/* Load operation */
-	append_operation(desc, cdata->algtype | OP_ALG_AS_INITFINAL |
-			 OP_ALG_ENCRYPT);
-
-	/* Perform operation */
-	ablkcipher_append_src_dst(desc);
-
-#ifdef DEBUG
-	print_hex_dump(KERN_ERR,
-		       "ablkcipher givenc shdesc@" __stringify(__LINE__) ": ",
-		       DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc), 1);
-#endif
-}
-EXPORT_SYMBOL(cnstr_shdsc_ablkcipher_givencap);
-
 /**
  * cnstr_shdsc_xts_ablkcipher_encap - xts ablkcipher encapsulation shared
  *                                    descriptor

diff --git a/drivers/crypto/caam/caamalg_desc.h b/drivers/crypto/caam/caamalg_desc.h
@@ -104,10 +104,6 @@ void cnstr_shdsc_ablkcipher_decap(u32 * const desc, struct alginfo *cdata,
 				  unsigned int ivsize, const bool is_rfc3686,
 				  const u32 ctx1_iv_off);
 
-void cnstr_shdsc_ablkcipher_givencap(u32 * const desc, struct alginfo *cdata,
-				     unsigned int ivsize, const bool is_rfc3686,
-				     const u32 ctx1_iv_off);
-
 void cnstr_shdsc_xts_ablkcipher_encap(u32 * const desc, struct alginfo *cdata);
 
 void cnstr_shdsc_xts_ablkcipher_decap(u32 * const desc, struct alginfo *cdata);