1572 lines
40 KiB
C
1572 lines
40 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Cryptographic API.
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*
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* Support for SAHARA cryptographic accelerator.
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*
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* Copyright (c) 2014 Steffen Trumtrar <s.trumtrar@pengutronix.de>
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* Copyright (c) 2013 Vista Silicon S.L.
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* Author: Javier Martin <javier.martin@vista-silicon.com>
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*
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* Based on omap-aes.c and tegra-aes.c
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*/
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#include <crypto/aes.h>
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#include <crypto/internal/hash.h>
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#include <crypto/internal/skcipher.h>
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#include <crypto/scatterwalk.h>
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#include <crypto/sha.h>
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#include <linux/clk.h>
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#include <linux/crypto.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/kernel.h>
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#include <linux/kthread.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#define SHA_BUFFER_LEN PAGE_SIZE
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#define SAHARA_MAX_SHA_BLOCK_SIZE SHA256_BLOCK_SIZE
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#define SAHARA_NAME "sahara"
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#define SAHARA_VERSION_3 3
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#define SAHARA_VERSION_4 4
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#define SAHARA_TIMEOUT_MS 1000
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#define SAHARA_MAX_HW_DESC 2
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#define SAHARA_MAX_HW_LINK 20
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#define FLAGS_MODE_MASK 0x000f
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#define FLAGS_ENCRYPT BIT(0)
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#define FLAGS_CBC BIT(1)
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#define FLAGS_NEW_KEY BIT(3)
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#define SAHARA_HDR_BASE 0x00800000
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#define SAHARA_HDR_SKHA_ALG_AES 0
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#define SAHARA_HDR_SKHA_OP_ENC (1 << 2)
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#define SAHARA_HDR_SKHA_MODE_ECB (0 << 3)
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#define SAHARA_HDR_SKHA_MODE_CBC (1 << 3)
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#define SAHARA_HDR_FORM_DATA (5 << 16)
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#define SAHARA_HDR_FORM_KEY (8 << 16)
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#define SAHARA_HDR_LLO (1 << 24)
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#define SAHARA_HDR_CHA_SKHA (1 << 28)
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#define SAHARA_HDR_CHA_MDHA (2 << 28)
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#define SAHARA_HDR_PARITY_BIT (1 << 31)
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#define SAHARA_HDR_MDHA_SET_MODE_MD_KEY 0x20880000
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#define SAHARA_HDR_MDHA_SET_MODE_HASH 0x208D0000
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#define SAHARA_HDR_MDHA_HASH 0xA0850000
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#define SAHARA_HDR_MDHA_STORE_DIGEST 0x20820000
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#define SAHARA_HDR_MDHA_ALG_SHA1 0
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#define SAHARA_HDR_MDHA_ALG_MD5 1
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#define SAHARA_HDR_MDHA_ALG_SHA256 2
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#define SAHARA_HDR_MDHA_ALG_SHA224 3
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#define SAHARA_HDR_MDHA_PDATA (1 << 2)
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#define SAHARA_HDR_MDHA_HMAC (1 << 3)
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#define SAHARA_HDR_MDHA_INIT (1 << 5)
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#define SAHARA_HDR_MDHA_IPAD (1 << 6)
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#define SAHARA_HDR_MDHA_OPAD (1 << 7)
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#define SAHARA_HDR_MDHA_SWAP (1 << 8)
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#define SAHARA_HDR_MDHA_MAC_FULL (1 << 9)
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#define SAHARA_HDR_MDHA_SSL (1 << 10)
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/* SAHARA can only process one request at a time */
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#define SAHARA_QUEUE_LENGTH 1
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#define SAHARA_REG_VERSION 0x00
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#define SAHARA_REG_DAR 0x04
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#define SAHARA_REG_CONTROL 0x08
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#define SAHARA_CONTROL_SET_THROTTLE(x) (((x) & 0xff) << 24)
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#define SAHARA_CONTROL_SET_MAXBURST(x) (((x) & 0xff) << 16)
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#define SAHARA_CONTROL_RNG_AUTORSD (1 << 7)
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#define SAHARA_CONTROL_ENABLE_INT (1 << 4)
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#define SAHARA_REG_CMD 0x0C
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#define SAHARA_CMD_RESET (1 << 0)
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#define SAHARA_CMD_CLEAR_INT (1 << 8)
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#define SAHARA_CMD_CLEAR_ERR (1 << 9)
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#define SAHARA_CMD_SINGLE_STEP (1 << 10)
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#define SAHARA_CMD_MODE_BATCH (1 << 16)
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#define SAHARA_CMD_MODE_DEBUG (1 << 18)
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#define SAHARA_REG_STATUS 0x10
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#define SAHARA_STATUS_GET_STATE(x) ((x) & 0x7)
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#define SAHARA_STATE_IDLE 0
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#define SAHARA_STATE_BUSY 1
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#define SAHARA_STATE_ERR 2
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#define SAHARA_STATE_FAULT 3
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#define SAHARA_STATE_COMPLETE 4
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#define SAHARA_STATE_COMP_FLAG (1 << 2)
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#define SAHARA_STATUS_DAR_FULL (1 << 3)
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#define SAHARA_STATUS_ERROR (1 << 4)
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#define SAHARA_STATUS_SECURE (1 << 5)
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#define SAHARA_STATUS_FAIL (1 << 6)
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#define SAHARA_STATUS_INIT (1 << 7)
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#define SAHARA_STATUS_RNG_RESEED (1 << 8)
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#define SAHARA_STATUS_ACTIVE_RNG (1 << 9)
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#define SAHARA_STATUS_ACTIVE_MDHA (1 << 10)
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#define SAHARA_STATUS_ACTIVE_SKHA (1 << 11)
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#define SAHARA_STATUS_MODE_BATCH (1 << 16)
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#define SAHARA_STATUS_MODE_DEDICATED (1 << 17)
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#define SAHARA_STATUS_MODE_DEBUG (1 << 18)
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#define SAHARA_STATUS_GET_ISTATE(x) (((x) >> 24) & 0xff)
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#define SAHARA_REG_ERRSTATUS 0x14
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#define SAHARA_ERRSTATUS_GET_SOURCE(x) ((x) & 0xf)
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#define SAHARA_ERRSOURCE_CHA 14
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#define SAHARA_ERRSOURCE_DMA 15
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#define SAHARA_ERRSTATUS_DMA_DIR (1 << 8)
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#define SAHARA_ERRSTATUS_GET_DMASZ(x)(((x) >> 9) & 0x3)
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#define SAHARA_ERRSTATUS_GET_DMASRC(x) (((x) >> 13) & 0x7)
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#define SAHARA_ERRSTATUS_GET_CHASRC(x) (((x) >> 16) & 0xfff)
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#define SAHARA_ERRSTATUS_GET_CHAERR(x) (((x) >> 28) & 0x3)
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#define SAHARA_REG_FADDR 0x18
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#define SAHARA_REG_CDAR 0x1C
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#define SAHARA_REG_IDAR 0x20
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struct sahara_hw_desc {
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u32 hdr;
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u32 len1;
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u32 p1;
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u32 len2;
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u32 p2;
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u32 next;
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};
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struct sahara_hw_link {
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u32 len;
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u32 p;
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u32 next;
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};
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struct sahara_ctx {
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unsigned long flags;
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/* AES-specific context */
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int keylen;
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u8 key[AES_KEYSIZE_128];
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struct crypto_sync_skcipher *fallback;
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};
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struct sahara_aes_reqctx {
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unsigned long mode;
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};
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/*
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* struct sahara_sha_reqctx - private data per request
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* @buf: holds data for requests smaller than block_size
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* @rembuf: used to prepare one block_size-aligned request
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* @context: hw-specific context for request. Digest is extracted from this
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* @mode: specifies what type of hw-descriptor needs to be built
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* @digest_size: length of digest for this request
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* @context_size: length of hw-context for this request.
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* Always digest_size + 4
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* @buf_cnt: number of bytes saved in buf
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* @sg_in_idx: number of hw links
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* @in_sg: scatterlist for input data
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* @in_sg_chain: scatterlists for chained input data
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* @total: total number of bytes for transfer
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* @last: is this the last block
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* @first: is this the first block
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* @active: inside a transfer
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*/
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struct sahara_sha_reqctx {
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u8 buf[SAHARA_MAX_SHA_BLOCK_SIZE];
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u8 rembuf[SAHARA_MAX_SHA_BLOCK_SIZE];
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u8 context[SHA256_DIGEST_SIZE + 4];
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unsigned int mode;
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unsigned int digest_size;
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unsigned int context_size;
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unsigned int buf_cnt;
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unsigned int sg_in_idx;
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struct scatterlist *in_sg;
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struct scatterlist in_sg_chain[2];
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size_t total;
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unsigned int last;
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unsigned int first;
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unsigned int active;
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};
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struct sahara_dev {
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struct device *device;
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unsigned int version;
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void __iomem *regs_base;
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struct clk *clk_ipg;
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struct clk *clk_ahb;
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struct mutex queue_mutex;
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struct task_struct *kthread;
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struct completion dma_completion;
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struct sahara_ctx *ctx;
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struct crypto_queue queue;
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unsigned long flags;
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struct sahara_hw_desc *hw_desc[SAHARA_MAX_HW_DESC];
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dma_addr_t hw_phys_desc[SAHARA_MAX_HW_DESC];
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u8 *key_base;
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dma_addr_t key_phys_base;
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u8 *iv_base;
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dma_addr_t iv_phys_base;
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u8 *context_base;
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dma_addr_t context_phys_base;
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struct sahara_hw_link *hw_link[SAHARA_MAX_HW_LINK];
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dma_addr_t hw_phys_link[SAHARA_MAX_HW_LINK];
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size_t total;
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struct scatterlist *in_sg;
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int nb_in_sg;
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struct scatterlist *out_sg;
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int nb_out_sg;
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u32 error;
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};
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static struct sahara_dev *dev_ptr;
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static inline void sahara_write(struct sahara_dev *dev, u32 data, u32 reg)
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{
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writel(data, dev->regs_base + reg);
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}
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static inline unsigned int sahara_read(struct sahara_dev *dev, u32 reg)
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{
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return readl(dev->regs_base + reg);
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}
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static u32 sahara_aes_key_hdr(struct sahara_dev *dev)
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{
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u32 hdr = SAHARA_HDR_BASE | SAHARA_HDR_SKHA_ALG_AES |
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SAHARA_HDR_FORM_KEY | SAHARA_HDR_LLO |
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SAHARA_HDR_CHA_SKHA | SAHARA_HDR_PARITY_BIT;
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if (dev->flags & FLAGS_CBC) {
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hdr |= SAHARA_HDR_SKHA_MODE_CBC;
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hdr ^= SAHARA_HDR_PARITY_BIT;
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}
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if (dev->flags & FLAGS_ENCRYPT) {
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hdr |= SAHARA_HDR_SKHA_OP_ENC;
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hdr ^= SAHARA_HDR_PARITY_BIT;
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}
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return hdr;
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}
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static u32 sahara_aes_data_link_hdr(struct sahara_dev *dev)
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{
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return SAHARA_HDR_BASE | SAHARA_HDR_FORM_DATA |
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SAHARA_HDR_CHA_SKHA | SAHARA_HDR_PARITY_BIT;
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}
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static const char *sahara_err_src[16] = {
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"No error",
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"Header error",
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"Descriptor length error",
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"Descriptor length or pointer error",
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"Link length error",
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"Link pointer error",
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"Input buffer error",
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"Output buffer error",
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"Output buffer starvation",
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"Internal state fault",
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"General descriptor problem",
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"Reserved",
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"Descriptor address error",
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"Link address error",
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"CHA error",
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"DMA error"
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};
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static const char *sahara_err_dmasize[4] = {
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"Byte transfer",
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"Half-word transfer",
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"Word transfer",
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"Reserved"
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};
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static const char *sahara_err_dmasrc[8] = {
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"No error",
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"AHB bus error",
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"Internal IP bus error",
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"Parity error",
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"DMA crosses 256 byte boundary",
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"DMA is busy",
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"Reserved",
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"DMA HW error"
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};
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static const char *sahara_cha_errsrc[12] = {
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"Input buffer non-empty",
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"Illegal address",
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"Illegal mode",
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"Illegal data size",
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"Illegal key size",
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"Write during processing",
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"CTX read during processing",
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"HW error",
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"Input buffer disabled/underflow",
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"Output buffer disabled/overflow",
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"DES key parity error",
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"Reserved"
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};
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static const char *sahara_cha_err[4] = { "No error", "SKHA", "MDHA", "RNG" };
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static void sahara_decode_error(struct sahara_dev *dev, unsigned int error)
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{
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u8 source = SAHARA_ERRSTATUS_GET_SOURCE(error);
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u16 chasrc = ffs(SAHARA_ERRSTATUS_GET_CHASRC(error));
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dev_err(dev->device, "%s: Error Register = 0x%08x\n", __func__, error);
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dev_err(dev->device, " - %s.\n", sahara_err_src[source]);
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if (source == SAHARA_ERRSOURCE_DMA) {
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if (error & SAHARA_ERRSTATUS_DMA_DIR)
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dev_err(dev->device, " * DMA read.\n");
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else
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dev_err(dev->device, " * DMA write.\n");
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dev_err(dev->device, " * %s.\n",
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sahara_err_dmasize[SAHARA_ERRSTATUS_GET_DMASZ(error)]);
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dev_err(dev->device, " * %s.\n",
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sahara_err_dmasrc[SAHARA_ERRSTATUS_GET_DMASRC(error)]);
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} else if (source == SAHARA_ERRSOURCE_CHA) {
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dev_err(dev->device, " * %s.\n",
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sahara_cha_errsrc[chasrc]);
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dev_err(dev->device, " * %s.\n",
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sahara_cha_err[SAHARA_ERRSTATUS_GET_CHAERR(error)]);
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}
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dev_err(dev->device, "\n");
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}
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static const char *sahara_state[4] = { "Idle", "Busy", "Error", "HW Fault" };
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static void sahara_decode_status(struct sahara_dev *dev, unsigned int status)
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{
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u8 state;
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if (!__is_defined(DEBUG))
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return;
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state = SAHARA_STATUS_GET_STATE(status);
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dev_dbg(dev->device, "%s: Status Register = 0x%08x\n",
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__func__, status);
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dev_dbg(dev->device, " - State = %d:\n", state);
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if (state & SAHARA_STATE_COMP_FLAG)
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dev_dbg(dev->device, " * Descriptor completed. IRQ pending.\n");
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dev_dbg(dev->device, " * %s.\n",
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sahara_state[state & ~SAHARA_STATE_COMP_FLAG]);
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if (status & SAHARA_STATUS_DAR_FULL)
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dev_dbg(dev->device, " - DAR Full.\n");
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if (status & SAHARA_STATUS_ERROR)
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dev_dbg(dev->device, " - Error.\n");
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if (status & SAHARA_STATUS_SECURE)
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dev_dbg(dev->device, " - Secure.\n");
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if (status & SAHARA_STATUS_FAIL)
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dev_dbg(dev->device, " - Fail.\n");
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if (status & SAHARA_STATUS_RNG_RESEED)
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dev_dbg(dev->device, " - RNG Reseed Request.\n");
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if (status & SAHARA_STATUS_ACTIVE_RNG)
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dev_dbg(dev->device, " - RNG Active.\n");
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if (status & SAHARA_STATUS_ACTIVE_MDHA)
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dev_dbg(dev->device, " - MDHA Active.\n");
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if (status & SAHARA_STATUS_ACTIVE_SKHA)
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dev_dbg(dev->device, " - SKHA Active.\n");
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if (status & SAHARA_STATUS_MODE_BATCH)
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dev_dbg(dev->device, " - Batch Mode.\n");
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else if (status & SAHARA_STATUS_MODE_DEDICATED)
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dev_dbg(dev->device, " - Dedicated Mode.\n");
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else if (status & SAHARA_STATUS_MODE_DEBUG)
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dev_dbg(dev->device, " - Debug Mode.\n");
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dev_dbg(dev->device, " - Internal state = 0x%02x\n",
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SAHARA_STATUS_GET_ISTATE(status));
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dev_dbg(dev->device, "Current DAR: 0x%08x\n",
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sahara_read(dev, SAHARA_REG_CDAR));
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dev_dbg(dev->device, "Initial DAR: 0x%08x\n\n",
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sahara_read(dev, SAHARA_REG_IDAR));
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}
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static void sahara_dump_descriptors(struct sahara_dev *dev)
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{
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int i;
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if (!__is_defined(DEBUG))
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return;
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for (i = 0; i < SAHARA_MAX_HW_DESC; i++) {
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dev_dbg(dev->device, "Descriptor (%d) (%pad):\n",
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i, &dev->hw_phys_desc[i]);
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dev_dbg(dev->device, "\thdr = 0x%08x\n", dev->hw_desc[i]->hdr);
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dev_dbg(dev->device, "\tlen1 = %u\n", dev->hw_desc[i]->len1);
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dev_dbg(dev->device, "\tp1 = 0x%08x\n", dev->hw_desc[i]->p1);
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dev_dbg(dev->device, "\tlen2 = %u\n", dev->hw_desc[i]->len2);
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dev_dbg(dev->device, "\tp2 = 0x%08x\n", dev->hw_desc[i]->p2);
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dev_dbg(dev->device, "\tnext = 0x%08x\n",
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dev->hw_desc[i]->next);
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}
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dev_dbg(dev->device, "\n");
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}
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static void sahara_dump_links(struct sahara_dev *dev)
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{
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int i;
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if (!__is_defined(DEBUG))
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return;
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for (i = 0; i < SAHARA_MAX_HW_LINK; i++) {
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dev_dbg(dev->device, "Link (%d) (%pad):\n",
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i, &dev->hw_phys_link[i]);
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dev_dbg(dev->device, "\tlen = %u\n", dev->hw_link[i]->len);
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dev_dbg(dev->device, "\tp = 0x%08x\n", dev->hw_link[i]->p);
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dev_dbg(dev->device, "\tnext = 0x%08x\n",
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dev->hw_link[i]->next);
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}
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dev_dbg(dev->device, "\n");
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}
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static int sahara_hw_descriptor_create(struct sahara_dev *dev)
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{
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struct sahara_ctx *ctx = dev->ctx;
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struct scatterlist *sg;
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int ret;
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int i, j;
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int idx = 0;
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/* Copy new key if necessary */
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if (ctx->flags & FLAGS_NEW_KEY) {
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memcpy(dev->key_base, ctx->key, ctx->keylen);
|
|
ctx->flags &= ~FLAGS_NEW_KEY;
|
|
|
|
if (dev->flags & FLAGS_CBC) {
|
|
dev->hw_desc[idx]->len1 = AES_BLOCK_SIZE;
|
|
dev->hw_desc[idx]->p1 = dev->iv_phys_base;
|
|
} else {
|
|
dev->hw_desc[idx]->len1 = 0;
|
|
dev->hw_desc[idx]->p1 = 0;
|
|
}
|
|
dev->hw_desc[idx]->len2 = ctx->keylen;
|
|
dev->hw_desc[idx]->p2 = dev->key_phys_base;
|
|
dev->hw_desc[idx]->next = dev->hw_phys_desc[1];
|
|
|
|
dev->hw_desc[idx]->hdr = sahara_aes_key_hdr(dev);
|
|
|
|
idx++;
|
|
}
|
|
|
|
dev->nb_in_sg = sg_nents_for_len(dev->in_sg, dev->total);
|
|
if (dev->nb_in_sg < 0) {
|
|
dev_err(dev->device, "Invalid numbers of src SG.\n");
|
|
return dev->nb_in_sg;
|
|
}
|
|
dev->nb_out_sg = sg_nents_for_len(dev->out_sg, dev->total);
|
|
if (dev->nb_out_sg < 0) {
|
|
dev_err(dev->device, "Invalid numbers of dst SG.\n");
|
|
return dev->nb_out_sg;
|
|
}
|
|
if ((dev->nb_in_sg + dev->nb_out_sg) > SAHARA_MAX_HW_LINK) {
|
|
dev_err(dev->device, "not enough hw links (%d)\n",
|
|
dev->nb_in_sg + dev->nb_out_sg);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = dma_map_sg(dev->device, dev->in_sg, dev->nb_in_sg,
|
|
DMA_TO_DEVICE);
|
|
if (ret != dev->nb_in_sg) {
|
|
dev_err(dev->device, "couldn't map in sg\n");
|
|
goto unmap_in;
|
|
}
|
|
ret = dma_map_sg(dev->device, dev->out_sg, dev->nb_out_sg,
|
|
DMA_FROM_DEVICE);
|
|
if (ret != dev->nb_out_sg) {
|
|
dev_err(dev->device, "couldn't map out sg\n");
|
|
goto unmap_out;
|
|
}
|
|
|
|
/* Create input links */
|
|
dev->hw_desc[idx]->p1 = dev->hw_phys_link[0];
|
|
sg = dev->in_sg;
|
|
for (i = 0; i < dev->nb_in_sg; i++) {
|
|
dev->hw_link[i]->len = sg->length;
|
|
dev->hw_link[i]->p = sg->dma_address;
|
|
if (i == (dev->nb_in_sg - 1)) {
|
|
dev->hw_link[i]->next = 0;
|
|
} else {
|
|
dev->hw_link[i]->next = dev->hw_phys_link[i + 1];
|
|
sg = sg_next(sg);
|
|
}
|
|
}
|
|
|
|
/* Create output links */
|
|
dev->hw_desc[idx]->p2 = dev->hw_phys_link[i];
|
|
sg = dev->out_sg;
|
|
for (j = i; j < dev->nb_out_sg + i; j++) {
|
|
dev->hw_link[j]->len = sg->length;
|
|
dev->hw_link[j]->p = sg->dma_address;
|
|
if (j == (dev->nb_out_sg + i - 1)) {
|
|
dev->hw_link[j]->next = 0;
|
|
} else {
|
|
dev->hw_link[j]->next = dev->hw_phys_link[j + 1];
|
|
sg = sg_next(sg);
|
|
}
|
|
}
|
|
|
|
/* Fill remaining fields of hw_desc[1] */
|
|
dev->hw_desc[idx]->hdr = sahara_aes_data_link_hdr(dev);
|
|
dev->hw_desc[idx]->len1 = dev->total;
|
|
dev->hw_desc[idx]->len2 = dev->total;
|
|
dev->hw_desc[idx]->next = 0;
|
|
|
|
sahara_dump_descriptors(dev);
|
|
sahara_dump_links(dev);
|
|
|
|
sahara_write(dev, dev->hw_phys_desc[0], SAHARA_REG_DAR);
|
|
|
|
return 0;
|
|
|
|
unmap_out:
|
|
dma_unmap_sg(dev->device, dev->out_sg, dev->nb_out_sg,
|
|
DMA_FROM_DEVICE);
|
|
unmap_in:
|
|
dma_unmap_sg(dev->device, dev->in_sg, dev->nb_in_sg,
|
|
DMA_TO_DEVICE);
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int sahara_aes_process(struct ablkcipher_request *req)
|
|
{
|
|
struct sahara_dev *dev = dev_ptr;
|
|
struct sahara_ctx *ctx;
|
|
struct sahara_aes_reqctx *rctx;
|
|
int ret;
|
|
unsigned long timeout;
|
|
|
|
/* Request is ready to be dispatched by the device */
|
|
dev_dbg(dev->device,
|
|
"dispatch request (nbytes=%d, src=%p, dst=%p)\n",
|
|
req->nbytes, req->src, req->dst);
|
|
|
|
/* assign new request to device */
|
|
dev->total = req->nbytes;
|
|
dev->in_sg = req->src;
|
|
dev->out_sg = req->dst;
|
|
|
|
rctx = ablkcipher_request_ctx(req);
|
|
ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req));
|
|
rctx->mode &= FLAGS_MODE_MASK;
|
|
dev->flags = (dev->flags & ~FLAGS_MODE_MASK) | rctx->mode;
|
|
|
|
if ((dev->flags & FLAGS_CBC) && req->info)
|
|
memcpy(dev->iv_base, req->info, AES_KEYSIZE_128);
|
|
|
|
/* assign new context to device */
|
|
dev->ctx = ctx;
|
|
|
|
reinit_completion(&dev->dma_completion);
|
|
|
|
ret = sahara_hw_descriptor_create(dev);
|
|
if (ret)
|
|
return -EINVAL;
|
|
|
|
timeout = wait_for_completion_timeout(&dev->dma_completion,
|
|
msecs_to_jiffies(SAHARA_TIMEOUT_MS));
|
|
if (!timeout) {
|
|
dev_err(dev->device, "AES timeout\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
dma_unmap_sg(dev->device, dev->out_sg, dev->nb_out_sg,
|
|
DMA_FROM_DEVICE);
|
|
dma_unmap_sg(dev->device, dev->in_sg, dev->nb_in_sg,
|
|
DMA_TO_DEVICE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sahara_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
|
|
unsigned int keylen)
|
|
{
|
|
struct sahara_ctx *ctx = crypto_ablkcipher_ctx(tfm);
|
|
int ret;
|
|
|
|
ctx->keylen = keylen;
|
|
|
|
/* SAHARA only supports 128bit keys */
|
|
if (keylen == AES_KEYSIZE_128) {
|
|
memcpy(ctx->key, key, keylen);
|
|
ctx->flags |= FLAGS_NEW_KEY;
|
|
return 0;
|
|
}
|
|
|
|
if (keylen != AES_KEYSIZE_192 && keylen != AES_KEYSIZE_256)
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* The requested key size is not supported by HW, do a fallback.
|
|
*/
|
|
crypto_sync_skcipher_clear_flags(ctx->fallback, CRYPTO_TFM_REQ_MASK);
|
|
crypto_sync_skcipher_set_flags(ctx->fallback, tfm->base.crt_flags &
|
|
CRYPTO_TFM_REQ_MASK);
|
|
|
|
ret = crypto_sync_skcipher_setkey(ctx->fallback, key, keylen);
|
|
|
|
tfm->base.crt_flags &= ~CRYPTO_TFM_RES_MASK;
|
|
tfm->base.crt_flags |= crypto_sync_skcipher_get_flags(ctx->fallback) &
|
|
CRYPTO_TFM_RES_MASK;
|
|
return ret;
|
|
}
|
|
|
|
static int sahara_aes_crypt(struct ablkcipher_request *req, unsigned long mode)
|
|
{
|
|
struct sahara_aes_reqctx *rctx = ablkcipher_request_ctx(req);
|
|
struct sahara_dev *dev = dev_ptr;
|
|
int err = 0;
|
|
|
|
dev_dbg(dev->device, "nbytes: %d, enc: %d, cbc: %d\n",
|
|
req->nbytes, !!(mode & FLAGS_ENCRYPT), !!(mode & FLAGS_CBC));
|
|
|
|
if (!IS_ALIGNED(req->nbytes, AES_BLOCK_SIZE)) {
|
|
dev_err(dev->device,
|
|
"request size is not exact amount of AES blocks\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
rctx->mode = mode;
|
|
|
|
mutex_lock(&dev->queue_mutex);
|
|
err = ablkcipher_enqueue_request(&dev->queue, req);
|
|
mutex_unlock(&dev->queue_mutex);
|
|
|
|
wake_up_process(dev->kthread);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int sahara_aes_ecb_encrypt(struct ablkcipher_request *req)
|
|
{
|
|
struct sahara_ctx *ctx = crypto_ablkcipher_ctx(
|
|
crypto_ablkcipher_reqtfm(req));
|
|
int err;
|
|
|
|
if (unlikely(ctx->keylen != AES_KEYSIZE_128)) {
|
|
SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback);
|
|
|
|
skcipher_request_set_sync_tfm(subreq, ctx->fallback);
|
|
skcipher_request_set_callback(subreq, req->base.flags,
|
|
NULL, NULL);
|
|
skcipher_request_set_crypt(subreq, req->src, req->dst,
|
|
req->nbytes, req->info);
|
|
err = crypto_skcipher_encrypt(subreq);
|
|
skcipher_request_zero(subreq);
|
|
return err;
|
|
}
|
|
|
|
return sahara_aes_crypt(req, FLAGS_ENCRYPT);
|
|
}
|
|
|
|
static int sahara_aes_ecb_decrypt(struct ablkcipher_request *req)
|
|
{
|
|
struct sahara_ctx *ctx = crypto_ablkcipher_ctx(
|
|
crypto_ablkcipher_reqtfm(req));
|
|
int err;
|
|
|
|
if (unlikely(ctx->keylen != AES_KEYSIZE_128)) {
|
|
SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback);
|
|
|
|
skcipher_request_set_sync_tfm(subreq, ctx->fallback);
|
|
skcipher_request_set_callback(subreq, req->base.flags,
|
|
NULL, NULL);
|
|
skcipher_request_set_crypt(subreq, req->src, req->dst,
|
|
req->nbytes, req->info);
|
|
err = crypto_skcipher_decrypt(subreq);
|
|
skcipher_request_zero(subreq);
|
|
return err;
|
|
}
|
|
|
|
return sahara_aes_crypt(req, 0);
|
|
}
|
|
|
|
static int sahara_aes_cbc_encrypt(struct ablkcipher_request *req)
|
|
{
|
|
struct sahara_ctx *ctx = crypto_ablkcipher_ctx(
|
|
crypto_ablkcipher_reqtfm(req));
|
|
int err;
|
|
|
|
if (unlikely(ctx->keylen != AES_KEYSIZE_128)) {
|
|
SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback);
|
|
|
|
skcipher_request_set_sync_tfm(subreq, ctx->fallback);
|
|
skcipher_request_set_callback(subreq, req->base.flags,
|
|
NULL, NULL);
|
|
skcipher_request_set_crypt(subreq, req->src, req->dst,
|
|
req->nbytes, req->info);
|
|
err = crypto_skcipher_encrypt(subreq);
|
|
skcipher_request_zero(subreq);
|
|
return err;
|
|
}
|
|
|
|
return sahara_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CBC);
|
|
}
|
|
|
|
static int sahara_aes_cbc_decrypt(struct ablkcipher_request *req)
|
|
{
|
|
struct sahara_ctx *ctx = crypto_ablkcipher_ctx(
|
|
crypto_ablkcipher_reqtfm(req));
|
|
int err;
|
|
|
|
if (unlikely(ctx->keylen != AES_KEYSIZE_128)) {
|
|
SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback);
|
|
|
|
skcipher_request_set_sync_tfm(subreq, ctx->fallback);
|
|
skcipher_request_set_callback(subreq, req->base.flags,
|
|
NULL, NULL);
|
|
skcipher_request_set_crypt(subreq, req->src, req->dst,
|
|
req->nbytes, req->info);
|
|
err = crypto_skcipher_decrypt(subreq);
|
|
skcipher_request_zero(subreq);
|
|
return err;
|
|
}
|
|
|
|
return sahara_aes_crypt(req, FLAGS_CBC);
|
|
}
|
|
|
|
static int sahara_aes_cra_init(struct crypto_tfm *tfm)
|
|
{
|
|
const char *name = crypto_tfm_alg_name(tfm);
|
|
struct sahara_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
ctx->fallback = crypto_alloc_sync_skcipher(name, 0,
|
|
CRYPTO_ALG_NEED_FALLBACK);
|
|
if (IS_ERR(ctx->fallback)) {
|
|
pr_err("Error allocating fallback algo %s\n", name);
|
|
return PTR_ERR(ctx->fallback);
|
|
}
|
|
|
|
tfm->crt_ablkcipher.reqsize = sizeof(struct sahara_aes_reqctx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sahara_aes_cra_exit(struct crypto_tfm *tfm)
|
|
{
|
|
struct sahara_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
crypto_free_sync_skcipher(ctx->fallback);
|
|
}
|
|
|
|
static u32 sahara_sha_init_hdr(struct sahara_dev *dev,
|
|
struct sahara_sha_reqctx *rctx)
|
|
{
|
|
u32 hdr = 0;
|
|
|
|
hdr = rctx->mode;
|
|
|
|
if (rctx->first) {
|
|
hdr |= SAHARA_HDR_MDHA_SET_MODE_HASH;
|
|
hdr |= SAHARA_HDR_MDHA_INIT;
|
|
} else {
|
|
hdr |= SAHARA_HDR_MDHA_SET_MODE_MD_KEY;
|
|
}
|
|
|
|
if (rctx->last)
|
|
hdr |= SAHARA_HDR_MDHA_PDATA;
|
|
|
|
if (hweight_long(hdr) % 2 == 0)
|
|
hdr |= SAHARA_HDR_PARITY_BIT;
|
|
|
|
return hdr;
|
|
}
|
|
|
|
static int sahara_sha_hw_links_create(struct sahara_dev *dev,
|
|
struct sahara_sha_reqctx *rctx,
|
|
int start)
|
|
{
|
|
struct scatterlist *sg;
|
|
unsigned int i;
|
|
int ret;
|
|
|
|
dev->in_sg = rctx->in_sg;
|
|
|
|
dev->nb_in_sg = sg_nents_for_len(dev->in_sg, rctx->total);
|
|
if (dev->nb_in_sg < 0) {
|
|
dev_err(dev->device, "Invalid numbers of src SG.\n");
|
|
return dev->nb_in_sg;
|
|
}
|
|
if ((dev->nb_in_sg) > SAHARA_MAX_HW_LINK) {
|
|
dev_err(dev->device, "not enough hw links (%d)\n",
|
|
dev->nb_in_sg + dev->nb_out_sg);
|
|
return -EINVAL;
|
|
}
|
|
|
|
sg = dev->in_sg;
|
|
ret = dma_map_sg(dev->device, dev->in_sg, dev->nb_in_sg, DMA_TO_DEVICE);
|
|
if (!ret)
|
|
return -EFAULT;
|
|
|
|
for (i = start; i < dev->nb_in_sg + start; i++) {
|
|
dev->hw_link[i]->len = sg->length;
|
|
dev->hw_link[i]->p = sg->dma_address;
|
|
if (i == (dev->nb_in_sg + start - 1)) {
|
|
dev->hw_link[i]->next = 0;
|
|
} else {
|
|
dev->hw_link[i]->next = dev->hw_phys_link[i + 1];
|
|
sg = sg_next(sg);
|
|
}
|
|
}
|
|
|
|
return i;
|
|
}
|
|
|
|
static int sahara_sha_hw_data_descriptor_create(struct sahara_dev *dev,
|
|
struct sahara_sha_reqctx *rctx,
|
|
struct ahash_request *req,
|
|
int index)
|
|
{
|
|
unsigned result_len;
|
|
int i = index;
|
|
|
|
if (rctx->first)
|
|
/* Create initial descriptor: #8*/
|
|
dev->hw_desc[index]->hdr = sahara_sha_init_hdr(dev, rctx);
|
|
else
|
|
/* Create hash descriptor: #10. Must follow #6. */
|
|
dev->hw_desc[index]->hdr = SAHARA_HDR_MDHA_HASH;
|
|
|
|
dev->hw_desc[index]->len1 = rctx->total;
|
|
if (dev->hw_desc[index]->len1 == 0) {
|
|
/* if len1 is 0, p1 must be 0, too */
|
|
dev->hw_desc[index]->p1 = 0;
|
|
rctx->sg_in_idx = 0;
|
|
} else {
|
|
/* Create input links */
|
|
dev->hw_desc[index]->p1 = dev->hw_phys_link[index];
|
|
i = sahara_sha_hw_links_create(dev, rctx, index);
|
|
|
|
rctx->sg_in_idx = index;
|
|
if (i < 0)
|
|
return i;
|
|
}
|
|
|
|
dev->hw_desc[index]->p2 = dev->hw_phys_link[i];
|
|
|
|
/* Save the context for the next operation */
|
|
result_len = rctx->context_size;
|
|
dev->hw_link[i]->p = dev->context_phys_base;
|
|
|
|
dev->hw_link[i]->len = result_len;
|
|
dev->hw_desc[index]->len2 = result_len;
|
|
|
|
dev->hw_link[i]->next = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Load descriptor aka #6
|
|
*
|
|
* To load a previously saved context back to the MDHA unit
|
|
*
|
|
* p1: Saved Context
|
|
* p2: NULL
|
|
*
|
|
*/
|
|
static int sahara_sha_hw_context_descriptor_create(struct sahara_dev *dev,
|
|
struct sahara_sha_reqctx *rctx,
|
|
struct ahash_request *req,
|
|
int index)
|
|
{
|
|
dev->hw_desc[index]->hdr = sahara_sha_init_hdr(dev, rctx);
|
|
|
|
dev->hw_desc[index]->len1 = rctx->context_size;
|
|
dev->hw_desc[index]->p1 = dev->hw_phys_link[index];
|
|
dev->hw_desc[index]->len2 = 0;
|
|
dev->hw_desc[index]->p2 = 0;
|
|
|
|
dev->hw_link[index]->len = rctx->context_size;
|
|
dev->hw_link[index]->p = dev->context_phys_base;
|
|
dev->hw_link[index]->next = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sahara_walk_and_recalc(struct scatterlist *sg, unsigned int nbytes)
|
|
{
|
|
if (!sg || !sg->length)
|
|
return nbytes;
|
|
|
|
while (nbytes && sg) {
|
|
if (nbytes <= sg->length) {
|
|
sg->length = nbytes;
|
|
sg_mark_end(sg);
|
|
break;
|
|
}
|
|
nbytes -= sg->length;
|
|
sg = sg_next(sg);
|
|
}
|
|
|
|
return nbytes;
|
|
}
|
|
|
|
static int sahara_sha_prepare_request(struct ahash_request *req)
|
|
{
|
|
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
|
|
struct sahara_sha_reqctx *rctx = ahash_request_ctx(req);
|
|
unsigned int hash_later;
|
|
unsigned int block_size;
|
|
unsigned int len;
|
|
|
|
block_size = crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
|
|
|
|
/* append bytes from previous operation */
|
|
len = rctx->buf_cnt + req->nbytes;
|
|
|
|
/* only the last transfer can be padded in hardware */
|
|
if (!rctx->last && (len < block_size)) {
|
|
/* to few data, save for next operation */
|
|
scatterwalk_map_and_copy(rctx->buf + rctx->buf_cnt, req->src,
|
|
0, req->nbytes, 0);
|
|
rctx->buf_cnt += req->nbytes;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* add data from previous operation first */
|
|
if (rctx->buf_cnt)
|
|
memcpy(rctx->rembuf, rctx->buf, rctx->buf_cnt);
|
|
|
|
/* data must always be a multiple of block_size */
|
|
hash_later = rctx->last ? 0 : len & (block_size - 1);
|
|
if (hash_later) {
|
|
unsigned int offset = req->nbytes - hash_later;
|
|
/* Save remaining bytes for later use */
|
|
scatterwalk_map_and_copy(rctx->buf, req->src, offset,
|
|
hash_later, 0);
|
|
}
|
|
|
|
/* nbytes should now be multiple of blocksize */
|
|
req->nbytes = req->nbytes - hash_later;
|
|
|
|
sahara_walk_and_recalc(req->src, req->nbytes);
|
|
|
|
/* have data from previous operation and current */
|
|
if (rctx->buf_cnt && req->nbytes) {
|
|
sg_init_table(rctx->in_sg_chain, 2);
|
|
sg_set_buf(rctx->in_sg_chain, rctx->rembuf, rctx->buf_cnt);
|
|
|
|
sg_chain(rctx->in_sg_chain, 2, req->src);
|
|
|
|
rctx->total = req->nbytes + rctx->buf_cnt;
|
|
rctx->in_sg = rctx->in_sg_chain;
|
|
|
|
req->src = rctx->in_sg_chain;
|
|
/* only data from previous operation */
|
|
} else if (rctx->buf_cnt) {
|
|
if (req->src)
|
|
rctx->in_sg = req->src;
|
|
else
|
|
rctx->in_sg = rctx->in_sg_chain;
|
|
/* buf was copied into rembuf above */
|
|
sg_init_one(rctx->in_sg, rctx->rembuf, rctx->buf_cnt);
|
|
rctx->total = rctx->buf_cnt;
|
|
/* no data from previous operation */
|
|
} else {
|
|
rctx->in_sg = req->src;
|
|
rctx->total = req->nbytes;
|
|
req->src = rctx->in_sg;
|
|
}
|
|
|
|
/* on next call, we only have the remaining data in the buffer */
|
|
rctx->buf_cnt = hash_later;
|
|
|
|
return -EINPROGRESS;
|
|
}
|
|
|
|
static int sahara_sha_process(struct ahash_request *req)
|
|
{
|
|
struct sahara_dev *dev = dev_ptr;
|
|
struct sahara_sha_reqctx *rctx = ahash_request_ctx(req);
|
|
int ret;
|
|
unsigned long timeout;
|
|
|
|
ret = sahara_sha_prepare_request(req);
|
|
if (!ret)
|
|
return ret;
|
|
|
|
if (rctx->first) {
|
|
sahara_sha_hw_data_descriptor_create(dev, rctx, req, 0);
|
|
dev->hw_desc[0]->next = 0;
|
|
rctx->first = 0;
|
|
} else {
|
|
memcpy(dev->context_base, rctx->context, rctx->context_size);
|
|
|
|
sahara_sha_hw_context_descriptor_create(dev, rctx, req, 0);
|
|
dev->hw_desc[0]->next = dev->hw_phys_desc[1];
|
|
sahara_sha_hw_data_descriptor_create(dev, rctx, req, 1);
|
|
dev->hw_desc[1]->next = 0;
|
|
}
|
|
|
|
sahara_dump_descriptors(dev);
|
|
sahara_dump_links(dev);
|
|
|
|
reinit_completion(&dev->dma_completion);
|
|
|
|
sahara_write(dev, dev->hw_phys_desc[0], SAHARA_REG_DAR);
|
|
|
|
timeout = wait_for_completion_timeout(&dev->dma_completion,
|
|
msecs_to_jiffies(SAHARA_TIMEOUT_MS));
|
|
if (!timeout) {
|
|
dev_err(dev->device, "SHA timeout\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
if (rctx->sg_in_idx)
|
|
dma_unmap_sg(dev->device, dev->in_sg, dev->nb_in_sg,
|
|
DMA_TO_DEVICE);
|
|
|
|
memcpy(rctx->context, dev->context_base, rctx->context_size);
|
|
|
|
if (req->result)
|
|
memcpy(req->result, rctx->context, rctx->digest_size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sahara_queue_manage(void *data)
|
|
{
|
|
struct sahara_dev *dev = (struct sahara_dev *)data;
|
|
struct crypto_async_request *async_req;
|
|
struct crypto_async_request *backlog;
|
|
int ret = 0;
|
|
|
|
do {
|
|
__set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
mutex_lock(&dev->queue_mutex);
|
|
backlog = crypto_get_backlog(&dev->queue);
|
|
async_req = crypto_dequeue_request(&dev->queue);
|
|
mutex_unlock(&dev->queue_mutex);
|
|
|
|
if (backlog)
|
|
backlog->complete(backlog, -EINPROGRESS);
|
|
|
|
if (async_req) {
|
|
if (crypto_tfm_alg_type(async_req->tfm) ==
|
|
CRYPTO_ALG_TYPE_AHASH) {
|
|
struct ahash_request *req =
|
|
ahash_request_cast(async_req);
|
|
|
|
ret = sahara_sha_process(req);
|
|
} else {
|
|
struct ablkcipher_request *req =
|
|
ablkcipher_request_cast(async_req);
|
|
|
|
ret = sahara_aes_process(req);
|
|
}
|
|
|
|
async_req->complete(async_req, ret);
|
|
|
|
continue;
|
|
}
|
|
|
|
schedule();
|
|
} while (!kthread_should_stop());
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sahara_sha_enqueue(struct ahash_request *req, int last)
|
|
{
|
|
struct sahara_sha_reqctx *rctx = ahash_request_ctx(req);
|
|
struct sahara_dev *dev = dev_ptr;
|
|
int ret;
|
|
|
|
if (!req->nbytes && !last)
|
|
return 0;
|
|
|
|
rctx->last = last;
|
|
|
|
if (!rctx->active) {
|
|
rctx->active = 1;
|
|
rctx->first = 1;
|
|
}
|
|
|
|
mutex_lock(&dev->queue_mutex);
|
|
ret = crypto_enqueue_request(&dev->queue, &req->base);
|
|
mutex_unlock(&dev->queue_mutex);
|
|
|
|
wake_up_process(dev->kthread);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int sahara_sha_init(struct ahash_request *req)
|
|
{
|
|
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
|
|
struct sahara_sha_reqctx *rctx = ahash_request_ctx(req);
|
|
|
|
memset(rctx, 0, sizeof(*rctx));
|
|
|
|
switch (crypto_ahash_digestsize(tfm)) {
|
|
case SHA1_DIGEST_SIZE:
|
|
rctx->mode |= SAHARA_HDR_MDHA_ALG_SHA1;
|
|
rctx->digest_size = SHA1_DIGEST_SIZE;
|
|
break;
|
|
case SHA256_DIGEST_SIZE:
|
|
rctx->mode |= SAHARA_HDR_MDHA_ALG_SHA256;
|
|
rctx->digest_size = SHA256_DIGEST_SIZE;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
rctx->context_size = rctx->digest_size + 4;
|
|
rctx->active = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sahara_sha_update(struct ahash_request *req)
|
|
{
|
|
return sahara_sha_enqueue(req, 0);
|
|
}
|
|
|
|
static int sahara_sha_final(struct ahash_request *req)
|
|
{
|
|
req->nbytes = 0;
|
|
return sahara_sha_enqueue(req, 1);
|
|
}
|
|
|
|
static int sahara_sha_finup(struct ahash_request *req)
|
|
{
|
|
return sahara_sha_enqueue(req, 1);
|
|
}
|
|
|
|
static int sahara_sha_digest(struct ahash_request *req)
|
|
{
|
|
sahara_sha_init(req);
|
|
|
|
return sahara_sha_finup(req);
|
|
}
|
|
|
|
static int sahara_sha_export(struct ahash_request *req, void *out)
|
|
{
|
|
struct sahara_sha_reqctx *rctx = ahash_request_ctx(req);
|
|
|
|
memcpy(out, rctx, sizeof(struct sahara_sha_reqctx));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sahara_sha_import(struct ahash_request *req, const void *in)
|
|
{
|
|
struct sahara_sha_reqctx *rctx = ahash_request_ctx(req);
|
|
|
|
memcpy(rctx, in, sizeof(struct sahara_sha_reqctx));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sahara_sha_cra_init(struct crypto_tfm *tfm)
|
|
{
|
|
crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
|
|
sizeof(struct sahara_sha_reqctx) +
|
|
SHA_BUFFER_LEN + SHA256_BLOCK_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct crypto_alg aes_algs[] = {
|
|
{
|
|
.cra_name = "ecb(aes)",
|
|
.cra_driver_name = "sahara-ecb-aes",
|
|
.cra_priority = 300,
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
|
|
CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK,
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct sahara_ctx),
|
|
.cra_alignmask = 0x0,
|
|
.cra_type = &crypto_ablkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = sahara_aes_cra_init,
|
|
.cra_exit = sahara_aes_cra_exit,
|
|
.cra_u.ablkcipher = {
|
|
.min_keysize = AES_MIN_KEY_SIZE ,
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
|
.setkey = sahara_aes_setkey,
|
|
.encrypt = sahara_aes_ecb_encrypt,
|
|
.decrypt = sahara_aes_ecb_decrypt,
|
|
}
|
|
}, {
|
|
.cra_name = "cbc(aes)",
|
|
.cra_driver_name = "sahara-cbc-aes",
|
|
.cra_priority = 300,
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
|
|
CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK,
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct sahara_ctx),
|
|
.cra_alignmask = 0x0,
|
|
.cra_type = &crypto_ablkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = sahara_aes_cra_init,
|
|
.cra_exit = sahara_aes_cra_exit,
|
|
.cra_u.ablkcipher = {
|
|
.min_keysize = AES_MIN_KEY_SIZE ,
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
|
.ivsize = AES_BLOCK_SIZE,
|
|
.setkey = sahara_aes_setkey,
|
|
.encrypt = sahara_aes_cbc_encrypt,
|
|
.decrypt = sahara_aes_cbc_decrypt,
|
|
}
|
|
}
|
|
};
|
|
|
|
static struct ahash_alg sha_v3_algs[] = {
|
|
{
|
|
.init = sahara_sha_init,
|
|
.update = sahara_sha_update,
|
|
.final = sahara_sha_final,
|
|
.finup = sahara_sha_finup,
|
|
.digest = sahara_sha_digest,
|
|
.export = sahara_sha_export,
|
|
.import = sahara_sha_import,
|
|
.halg.digestsize = SHA1_DIGEST_SIZE,
|
|
.halg.statesize = sizeof(struct sahara_sha_reqctx),
|
|
.halg.base = {
|
|
.cra_name = "sha1",
|
|
.cra_driver_name = "sahara-sha1",
|
|
.cra_priority = 300,
|
|
.cra_flags = CRYPTO_ALG_ASYNC |
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
|
.cra_blocksize = SHA1_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct sahara_ctx),
|
|
.cra_alignmask = 0,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = sahara_sha_cra_init,
|
|
}
|
|
},
|
|
};
|
|
|
|
static struct ahash_alg sha_v4_algs[] = {
|
|
{
|
|
.init = sahara_sha_init,
|
|
.update = sahara_sha_update,
|
|
.final = sahara_sha_final,
|
|
.finup = sahara_sha_finup,
|
|
.digest = sahara_sha_digest,
|
|
.export = sahara_sha_export,
|
|
.import = sahara_sha_import,
|
|
.halg.digestsize = SHA256_DIGEST_SIZE,
|
|
.halg.statesize = sizeof(struct sahara_sha_reqctx),
|
|
.halg.base = {
|
|
.cra_name = "sha256",
|
|
.cra_driver_name = "sahara-sha256",
|
|
.cra_priority = 300,
|
|
.cra_flags = CRYPTO_ALG_ASYNC |
|
|
CRYPTO_ALG_NEED_FALLBACK,
|
|
.cra_blocksize = SHA256_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct sahara_ctx),
|
|
.cra_alignmask = 0,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_init = sahara_sha_cra_init,
|
|
}
|
|
},
|
|
};
|
|
|
|
static irqreturn_t sahara_irq_handler(int irq, void *data)
|
|
{
|
|
struct sahara_dev *dev = (struct sahara_dev *)data;
|
|
unsigned int stat = sahara_read(dev, SAHARA_REG_STATUS);
|
|
unsigned int err = sahara_read(dev, SAHARA_REG_ERRSTATUS);
|
|
|
|
sahara_write(dev, SAHARA_CMD_CLEAR_INT | SAHARA_CMD_CLEAR_ERR,
|
|
SAHARA_REG_CMD);
|
|
|
|
sahara_decode_status(dev, stat);
|
|
|
|
if (SAHARA_STATUS_GET_STATE(stat) == SAHARA_STATE_BUSY) {
|
|
return IRQ_NONE;
|
|
} else if (SAHARA_STATUS_GET_STATE(stat) == SAHARA_STATE_COMPLETE) {
|
|
dev->error = 0;
|
|
} else {
|
|
sahara_decode_error(dev, err);
|
|
dev->error = -EINVAL;
|
|
}
|
|
|
|
complete(&dev->dma_completion);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
|
|
static int sahara_register_algs(struct sahara_dev *dev)
|
|
{
|
|
int err;
|
|
unsigned int i, j, k, l;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(aes_algs); i++) {
|
|
err = crypto_register_alg(&aes_algs[i]);
|
|
if (err)
|
|
goto err_aes_algs;
|
|
}
|
|
|
|
for (k = 0; k < ARRAY_SIZE(sha_v3_algs); k++) {
|
|
err = crypto_register_ahash(&sha_v3_algs[k]);
|
|
if (err)
|
|
goto err_sha_v3_algs;
|
|
}
|
|
|
|
if (dev->version > SAHARA_VERSION_3)
|
|
for (l = 0; l < ARRAY_SIZE(sha_v4_algs); l++) {
|
|
err = crypto_register_ahash(&sha_v4_algs[l]);
|
|
if (err)
|
|
goto err_sha_v4_algs;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_sha_v4_algs:
|
|
for (j = 0; j < l; j++)
|
|
crypto_unregister_ahash(&sha_v4_algs[j]);
|
|
|
|
err_sha_v3_algs:
|
|
for (j = 0; j < k; j++)
|
|
crypto_unregister_ahash(&sha_v3_algs[j]);
|
|
|
|
err_aes_algs:
|
|
for (j = 0; j < i; j++)
|
|
crypto_unregister_alg(&aes_algs[j]);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void sahara_unregister_algs(struct sahara_dev *dev)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(aes_algs); i++)
|
|
crypto_unregister_alg(&aes_algs[i]);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(sha_v3_algs); i++)
|
|
crypto_unregister_ahash(&sha_v3_algs[i]);
|
|
|
|
if (dev->version > SAHARA_VERSION_3)
|
|
for (i = 0; i < ARRAY_SIZE(sha_v4_algs); i++)
|
|
crypto_unregister_ahash(&sha_v4_algs[i]);
|
|
}
|
|
|
|
static const struct platform_device_id sahara_platform_ids[] = {
|
|
{ .name = "sahara-imx27" },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, sahara_platform_ids);
|
|
|
|
static const struct of_device_id sahara_dt_ids[] = {
|
|
{ .compatible = "fsl,imx53-sahara" },
|
|
{ .compatible = "fsl,imx27-sahara" },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, sahara_dt_ids);
|
|
|
|
static int sahara_probe(struct platform_device *pdev)
|
|
{
|
|
struct sahara_dev *dev;
|
|
u32 version;
|
|
int irq;
|
|
int err;
|
|
int i;
|
|
|
|
dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
|
|
if (!dev)
|
|
return -ENOMEM;
|
|
|
|
dev->device = &pdev->dev;
|
|
platform_set_drvdata(pdev, dev);
|
|
|
|
/* Get the base address */
|
|
dev->regs_base = devm_platform_ioremap_resource(pdev, 0);
|
|
if (IS_ERR(dev->regs_base))
|
|
return PTR_ERR(dev->regs_base);
|
|
|
|
/* Get the IRQ */
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0) {
|
|
dev_err(&pdev->dev, "failed to get irq resource\n");
|
|
return irq;
|
|
}
|
|
|
|
err = devm_request_irq(&pdev->dev, irq, sahara_irq_handler,
|
|
0, dev_name(&pdev->dev), dev);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "failed to request irq\n");
|
|
return err;
|
|
}
|
|
|
|
/* clocks */
|
|
dev->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
|
|
if (IS_ERR(dev->clk_ipg)) {
|
|
dev_err(&pdev->dev, "Could not get ipg clock\n");
|
|
return PTR_ERR(dev->clk_ipg);
|
|
}
|
|
|
|
dev->clk_ahb = devm_clk_get(&pdev->dev, "ahb");
|
|
if (IS_ERR(dev->clk_ahb)) {
|
|
dev_err(&pdev->dev, "Could not get ahb clock\n");
|
|
return PTR_ERR(dev->clk_ahb);
|
|
}
|
|
|
|
/* Allocate HW descriptors */
|
|
dev->hw_desc[0] = dmam_alloc_coherent(&pdev->dev,
|
|
SAHARA_MAX_HW_DESC * sizeof(struct sahara_hw_desc),
|
|
&dev->hw_phys_desc[0], GFP_KERNEL);
|
|
if (!dev->hw_desc[0]) {
|
|
dev_err(&pdev->dev, "Could not allocate hw descriptors\n");
|
|
return -ENOMEM;
|
|
}
|
|
dev->hw_desc[1] = dev->hw_desc[0] + 1;
|
|
dev->hw_phys_desc[1] = dev->hw_phys_desc[0] +
|
|
sizeof(struct sahara_hw_desc);
|
|
|
|
/* Allocate space for iv and key */
|
|
dev->key_base = dmam_alloc_coherent(&pdev->dev, 2 * AES_KEYSIZE_128,
|
|
&dev->key_phys_base, GFP_KERNEL);
|
|
if (!dev->key_base) {
|
|
dev_err(&pdev->dev, "Could not allocate memory for key\n");
|
|
return -ENOMEM;
|
|
}
|
|
dev->iv_base = dev->key_base + AES_KEYSIZE_128;
|
|
dev->iv_phys_base = dev->key_phys_base + AES_KEYSIZE_128;
|
|
|
|
/* Allocate space for context: largest digest + message length field */
|
|
dev->context_base = dmam_alloc_coherent(&pdev->dev,
|
|
SHA256_DIGEST_SIZE + 4,
|
|
&dev->context_phys_base, GFP_KERNEL);
|
|
if (!dev->context_base) {
|
|
dev_err(&pdev->dev, "Could not allocate memory for MDHA context\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Allocate space for HW links */
|
|
dev->hw_link[0] = dmam_alloc_coherent(&pdev->dev,
|
|
SAHARA_MAX_HW_LINK * sizeof(struct sahara_hw_link),
|
|
&dev->hw_phys_link[0], GFP_KERNEL);
|
|
if (!dev->hw_link[0]) {
|
|
dev_err(&pdev->dev, "Could not allocate hw links\n");
|
|
return -ENOMEM;
|
|
}
|
|
for (i = 1; i < SAHARA_MAX_HW_LINK; i++) {
|
|
dev->hw_phys_link[i] = dev->hw_phys_link[i - 1] +
|
|
sizeof(struct sahara_hw_link);
|
|
dev->hw_link[i] = dev->hw_link[i - 1] + 1;
|
|
}
|
|
|
|
crypto_init_queue(&dev->queue, SAHARA_QUEUE_LENGTH);
|
|
|
|
mutex_init(&dev->queue_mutex);
|
|
|
|
dev_ptr = dev;
|
|
|
|
dev->kthread = kthread_run(sahara_queue_manage, dev, "sahara_crypto");
|
|
if (IS_ERR(dev->kthread)) {
|
|
return PTR_ERR(dev->kthread);
|
|
}
|
|
|
|
init_completion(&dev->dma_completion);
|
|
|
|
err = clk_prepare_enable(dev->clk_ipg);
|
|
if (err)
|
|
return err;
|
|
err = clk_prepare_enable(dev->clk_ahb);
|
|
if (err)
|
|
goto clk_ipg_disable;
|
|
|
|
version = sahara_read(dev, SAHARA_REG_VERSION);
|
|
if (of_device_is_compatible(pdev->dev.of_node, "fsl,imx27-sahara")) {
|
|
if (version != SAHARA_VERSION_3)
|
|
err = -ENODEV;
|
|
} else if (of_device_is_compatible(pdev->dev.of_node,
|
|
"fsl,imx53-sahara")) {
|
|
if (((version >> 8) & 0xff) != SAHARA_VERSION_4)
|
|
err = -ENODEV;
|
|
version = (version >> 8) & 0xff;
|
|
}
|
|
if (err == -ENODEV) {
|
|
dev_err(&pdev->dev, "SAHARA version %d not supported\n",
|
|
version);
|
|
goto err_algs;
|
|
}
|
|
|
|
dev->version = version;
|
|
|
|
sahara_write(dev, SAHARA_CMD_RESET | SAHARA_CMD_MODE_BATCH,
|
|
SAHARA_REG_CMD);
|
|
sahara_write(dev, SAHARA_CONTROL_SET_THROTTLE(0) |
|
|
SAHARA_CONTROL_SET_MAXBURST(8) |
|
|
SAHARA_CONTROL_RNG_AUTORSD |
|
|
SAHARA_CONTROL_ENABLE_INT,
|
|
SAHARA_REG_CONTROL);
|
|
|
|
err = sahara_register_algs(dev);
|
|
if (err)
|
|
goto err_algs;
|
|
|
|
dev_info(&pdev->dev, "SAHARA version %d initialized\n", version);
|
|
|
|
return 0;
|
|
|
|
err_algs:
|
|
kthread_stop(dev->kthread);
|
|
dev_ptr = NULL;
|
|
clk_disable_unprepare(dev->clk_ahb);
|
|
clk_ipg_disable:
|
|
clk_disable_unprepare(dev->clk_ipg);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int sahara_remove(struct platform_device *pdev)
|
|
{
|
|
struct sahara_dev *dev = platform_get_drvdata(pdev);
|
|
|
|
kthread_stop(dev->kthread);
|
|
|
|
sahara_unregister_algs(dev);
|
|
|
|
clk_disable_unprepare(dev->clk_ipg);
|
|
clk_disable_unprepare(dev->clk_ahb);
|
|
|
|
dev_ptr = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver sahara_driver = {
|
|
.probe = sahara_probe,
|
|
.remove = sahara_remove,
|
|
.driver = {
|
|
.name = SAHARA_NAME,
|
|
.of_match_table = sahara_dt_ids,
|
|
},
|
|
.id_table = sahara_platform_ids,
|
|
};
|
|
|
|
module_platform_driver(sahara_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com>");
|
|
MODULE_AUTHOR("Steffen Trumtrar <s.trumtrar@pengutronix.de>");
|
|
MODULE_DESCRIPTION("SAHARA2 HW crypto accelerator");
|