crypto: amcc - Add crypt4xx driver

This patch adds support for AMCC ppc4xx security device driver. This is the
initial release that includes the driver framework with AES and SHA1 algorithms
support.

The remaining algorithms will be released in the near future.

Signed-off-by: James Hsiao <jhsiao@amcc.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 177 insertions, 0 deletions

diff --git a/drivers/crypto/amcc/crypto4xx_core.h b/drivers/crypto/amcc/crypto4xx_core.h
new file mode 100644
index 000000000000..1ef103449364
--- /dev/null
+++ b/drivers/crypto/amcc/crypto4xx_core.h
@@ -0,0 +1,177 @@
+/**
+ * AMCC SoC PPC4xx Crypto Driver
+ *
+ * Copyright (c) 2008 Applied Micro Circuits Corporation.
+ * All rights reserved. James Hsiao <jhsiao@amcc.com>
+ *
+ * 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.
+ *
+ * This is the header file for AMCC Crypto offload Linux device driver for
+ * use with Linux CryptoAPI.
+
+ */
+
+#ifndef __CRYPTO4XX_CORE_H__
+#define __CRYPTO4XX_CORE_H__
+
+#define PPC460SX_SDR0_SRST                      0x201
+#define PPC405EX_SDR0_SRST                      0x200
+#define PPC460EX_SDR0_SRST                      0x201
+#define PPC460EX_CE_RESET                       0x08000000
+#define PPC460SX_CE_RESET                       0x20000000
+#define PPC405EX_CE_RESET                       0x00000008
+
+#define CRYPTO4XX_CRYPTO_PRIORITY		300
+#define PPC4XX_LAST_PD				63
+#define PPC4XX_NUM_PD				64
+#define PPC4XX_LAST_GD				1023
+#define PPC4XX_NUM_GD				1024
+#define PPC4XX_LAST_SD				63
+#define PPC4XX_NUM_SD				64
+#define PPC4XX_SD_BUFFER_SIZE			2048
+
+#define PD_ENTRY_INUSE				1
+#define PD_ENTRY_FREE				0
+#define ERING_WAS_FULL				0xffffffff
+
+struct crypto4xx_device;
+
+struct pd_uinfo {
+	struct crypto4xx_device *dev;
+	u32   state;
+	u32 using_sd;
+	u32 first_gd;		/* first gather discriptor
+				used by this packet */
+	u32 num_gd;             /* number of gather discriptor
+				used by this packet */
+	u32 first_sd;		/* first scatter discriptor
+				used by this packet */
+	u32 num_sd;		/* number of scatter discriptors
+				used by this packet */
+	void *sa_va;		/* shadow sa, when using cp from ctx->sa */
+	u32 sa_pa;
+	void *sr_va;		/* state record for shadow sa */
+	u32 sr_pa;
+	struct scatterlist *dest_va;
+	struct crypto_async_request *async_req; 	/* base crypto request
+							for this packet */
+};
+
+struct crypto4xx_device {
+	struct crypto4xx_core_device *core_dev;
+	char *name;
+	u64  ce_phy_address;
+	void __iomem *ce_base;
+
+	void *pdr;			/* base address of packet
+					descriptor ring */
+	dma_addr_t pdr_pa;		/* physical address used to
+					program ce pdr_base_register */
+	void *gdr;                      /* gather descriptor ring */
+	dma_addr_t gdr_pa;		/* physical address used to
+					program ce gdr_base_register */
+	void *sdr;			/* scatter descriptor ring */
+	dma_addr_t sdr_pa;		/* physical address used to
+					program ce sdr_base_register */
+	void *scatter_buffer_va;
+	dma_addr_t scatter_buffer_pa;
+	u32 scatter_buffer_size;
+
+	void *shadow_sa_pool;		/* pool of memory for sa in pd_uinfo */
+	dma_addr_t shadow_sa_pool_pa;
+	void *shadow_sr_pool;		/* pool of memory for sr in pd_uinfo */
+	dma_addr_t shadow_sr_pool_pa;
+	u32 pdr_tail;
+	u32 pdr_head;
+	u32 gdr_tail;
+	u32 gdr_head;
+	u32 sdr_tail;
+	u32 sdr_head;
+	void *pdr_uinfo;
+	struct list_head alg_list;	/* List of algorithm supported
+					by this device */
+};
+
+struct crypto4xx_core_device {
+	struct device *device;
+	struct of_device *ofdev;
+	struct crypto4xx_device *dev;
+	u32 int_status;
+	u32 irq;
+	struct tasklet_struct tasklet;
+	spinlock_t lock;
+};
+
+struct crypto4xx_ctx {
+	struct crypto4xx_device *dev;
+	void *sa_in;
+	dma_addr_t sa_in_dma_addr;
+	void *sa_out;
+	dma_addr_t sa_out_dma_addr;
+	void *state_record;
+	dma_addr_t state_record_dma_addr;
+	u32 sa_len;
+	u32 offset_to_sr_ptr;           /* offset to state ptr, in dynamic sa */
+	u32 direction;
+	u32 next_hdr;
+	u32 save_iv;
+	u32 pd_ctl_len;
+	u32 pd_ctl;
+	u32 bypass;
+	u32 is_hash;
+	u32 hash_final;
+};
+
+struct crypto4xx_req_ctx {
+	struct crypto4xx_device *dev;	/* Device in which
+					operation to send to */
+	void *sa;
+	u32 sa_dma_addr;
+	u16 sa_len;
+};
+
+struct crypto4xx_alg {
+	struct list_head  entry;
+	struct crypto_alg alg;
+	struct crypto4xx_device *dev;
+};
+
+#define crypto_alg_to_crypto4xx_alg(x) \
+		container_of(x, struct crypto4xx_alg, alg)
+
+extern int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size);
+extern void crypto4xx_free_sa(struct crypto4xx_ctx *ctx);
+extern u32 crypto4xx_alloc_sa_rctx(struct crypto4xx_ctx *ctx,
+				   struct crypto4xx_ctx *rctx);
+extern void crypto4xx_free_sa_rctx(struct crypto4xx_ctx *rctx);
+extern void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx);
+extern u32 crypto4xx_alloc_state_record(struct crypto4xx_ctx *ctx);
+extern u32 get_dynamic_sa_offset_state_ptr_field(struct crypto4xx_ctx *ctx);
+extern u32 get_dynamic_sa_offset_key_field(struct crypto4xx_ctx *ctx);
+extern u32 get_dynamic_sa_iv_size(struct crypto4xx_ctx *ctx);
+extern void crypto4xx_memcpy_le(unsigned int *dst,
+				const unsigned char *buf, int len);
+extern u32 crypto4xx_build_pd(struct crypto_async_request *req,
+			      struct crypto4xx_ctx *ctx,
+			      struct scatterlist *src,
+			      struct scatterlist *dst,
+			      unsigned int datalen,
+			      void *iv, u32 iv_len);
+extern int crypto4xx_setkey_aes_cbc(struct crypto_ablkcipher *cipher,
+				    const u8 *key, unsigned int keylen);
+extern int crypto4xx_encrypt(struct ablkcipher_request *req);
+extern int crypto4xx_decrypt(struct ablkcipher_request *req);
+extern int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm);
+extern int crypto4xx_hash_digest(struct ahash_request *req);
+extern int crypto4xx_hash_final(struct ahash_request *req);
+extern int crypto4xx_hash_update(struct ahash_request *req);
+extern int crypto4xx_hash_init(struct ahash_request *req);
+#endif