[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/crypto/842.c b/src/kernel/linux/v4.14/crypto/842.c
new file mode 100644
index 0000000..bc26dc9
--- /dev/null
+++ b/src/kernel/linux/v4.14/crypto/842.c
@@ -0,0 +1,160 @@
+/*
+ * Cryptographic API for the 842 software compression algorithm.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * Copyright (C) IBM Corporation, 2011-2015
+ *
+ * Original Authors: Robert Jennings <rcj@linux.vnet.ibm.com>
+ * Seth Jennings <sjenning@linux.vnet.ibm.com>
+ *
+ * Rewrite: Dan Streetman <ddstreet@ieee.org>
+ *
+ * This is the software implementation of compression and decompression using
+ * the 842 format. This uses the software 842 library at lib/842/ which is
+ * only a reference implementation, and is very, very slow as compared to other
+ * software compressors. You probably do not want to use this software
+ * compression. If you have access to the PowerPC 842 compression hardware, you
+ * want to use the 842 hardware compression interface, which is at:
+ * drivers/crypto/nx/nx-842-crypto.c
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/crypto.h>
+#include <linux/sw842.h>
+#include <crypto/internal/scompress.h>
+
+struct crypto842_ctx {
+ void *wmem; /* working memory for compress */
+};
+
+static void *crypto842_alloc_ctx(struct crypto_scomp *tfm)
+{
+ void *ctx;
+
+ ctx = kmalloc(SW842_MEM_COMPRESS, GFP_KERNEL);
+ if (!ctx)
+ return ERR_PTR(-ENOMEM);
+
+ return ctx;
+}
+
+static int crypto842_init(struct crypto_tfm *tfm)
+{
+ struct crypto842_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ ctx->wmem = crypto842_alloc_ctx(NULL);
+ if (IS_ERR(ctx->wmem))
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void crypto842_free_ctx(struct crypto_scomp *tfm, void *ctx)
+{
+ kfree(ctx);
+}
+
+static void crypto842_exit(struct crypto_tfm *tfm)
+{
+ struct crypto842_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ crypto842_free_ctx(NULL, ctx->wmem);
+}
+
+static int crypto842_compress(struct crypto_tfm *tfm,
+ const u8 *src, unsigned int slen,
+ u8 *dst, unsigned int *dlen)
+{
+ struct crypto842_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ return sw842_compress(src, slen, dst, dlen, ctx->wmem);
+}
+
+static int crypto842_scompress(struct crypto_scomp *tfm,
+ const u8 *src, unsigned int slen,
+ u8 *dst, unsigned int *dlen, void *ctx)
+{
+ return sw842_compress(src, slen, dst, dlen, ctx);
+}
+
+static int crypto842_decompress(struct crypto_tfm *tfm,
+ const u8 *src, unsigned int slen,
+ u8 *dst, unsigned int *dlen)
+{
+ return sw842_decompress(src, slen, dst, dlen);
+}
+
+static int crypto842_sdecompress(struct crypto_scomp *tfm,
+ const u8 *src, unsigned int slen,
+ u8 *dst, unsigned int *dlen, void *ctx)
+{
+ return sw842_decompress(src, slen, dst, dlen);
+}
+
+static struct crypto_alg alg = {
+ .cra_name = "842",
+ .cra_driver_name = "842-generic",
+ .cra_priority = 100,
+ .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
+ .cra_ctxsize = sizeof(struct crypto842_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_init = crypto842_init,
+ .cra_exit = crypto842_exit,
+ .cra_u = { .compress = {
+ .coa_compress = crypto842_compress,
+ .coa_decompress = crypto842_decompress } }
+};
+
+static struct scomp_alg scomp = {
+ .alloc_ctx = crypto842_alloc_ctx,
+ .free_ctx = crypto842_free_ctx,
+ .compress = crypto842_scompress,
+ .decompress = crypto842_sdecompress,
+ .base = {
+ .cra_name = "842",
+ .cra_driver_name = "842-scomp",
+ .cra_priority = 100,
+ .cra_module = THIS_MODULE,
+ }
+};
+
+static int __init crypto842_mod_init(void)
+{
+ int ret;
+
+ ret = crypto_register_alg(&alg);
+ if (ret)
+ return ret;
+
+ ret = crypto_register_scomp(&scomp);
+ if (ret) {
+ crypto_unregister_alg(&alg);
+ return ret;
+ }
+
+ return ret;
+}
+module_init(crypto842_mod_init);
+
+static void __exit crypto842_mod_exit(void)
+{
+ crypto_unregister_alg(&alg);
+ crypto_unregister_scomp(&scomp);
+}
+module_exit(crypto842_mod_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("842 Software Compression Algorithm");
+MODULE_ALIAS_CRYPTO("842");
+MODULE_ALIAS_CRYPTO("842-generic");
+MODULE_AUTHOR("Dan Streetman <ddstreet@ieee.org>");