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Subject[PATCH] crypto: s5p-sss: Add HASH support for Exynos
Date
Add support for MD5, SHA1, SHA256 hash algorithms for Exynos HW.
It uses the crypto framework asynchronous hash api.
It is based on omap-sham.c driver.
S5P has some HW differencies and is not implemented.

Modifications in s5p-sss:

- Add hash supporting structures and functions.

- Modify irq handler to handle both aes and hash signals.

- Disable HASH in probe if Exynos PRNG is enabled.

- Add new copyright line and new author.

- Tested on Odroid-U3 with Exynos 4412 CPU, kernel 4.13-rc6
with crypto run-time self test testmgr
and with tcrypt module with: modprobe tcrypt sec=1 mode=N
where N=402, 403, 404 (MD5, SHA1, SHA256).

Modifications in drivers/crypto/Kconfig:

- Select sw algorithms MD5, SHA1 and SHA256 in S5P
as they are nedded for fallback.

Signed-off-by: Kamil Konieczny <k.konieczny@partner.samsung.com>
---
drivers/crypto/Kconfig | 6 +
drivers/crypto/s5p-sss.c | 2062 +++++++++++++++++++++++++++++++++++++++++++---
2 files changed, 1939 insertions(+), 129 deletions(-)

diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index fe33c199fc1a..a8bc7e73c6bc 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -434,10 +434,16 @@ config CRYPTO_DEV_S5P
depends on HAS_IOMEM && HAS_DMA
select CRYPTO_AES
select CRYPTO_BLKCIPHER
+ select CRYPTO_SHA1
+ select CRYPTO_MD5
+ select CRYPTO_SHA256
help
This option allows you to have support for S5P crypto acceleration.
Select this to offload Samsung S5PV210 or S5PC110, Exynos from AES
algorithms execution.
+ Select this to offload Exynos from HASH MD5/SHA1/SHA256.
+ HASH algorithms will be disabled in runtime if EXYNOS_RNG
+ was enabled due to hw conflict.

config CRYPTO_DEV_NX
bool "Support for IBM PowerPC Nest (NX) cryptographic acceleration"
diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c
index 7ac657f46d15..ed2739198508 100644
--- a/drivers/crypto/s5p-sss.c
+++ b/drivers/crypto/s5p-sss.c
@@ -1,18 +1,21 @@
/*
* Cryptographic API.
*
- * Support for Samsung S5PV210 HW acceleration.
+ * Support for Samsung S5PV210 and Exynos HW acceleration.
*
* Copyright (C) 2011 NetUP Inc. All rights reserved.
+ * Copyright (c) 2017 Samsung Electronics Co., Ltd. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
+ * Hash part based on omap-sham.c driver.
*/

#include <linux/clk.h>
#include <linux/crypto.h>
+#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/errno.h>
@@ -30,28 +33,67 @@
#include <crypto/algapi.h>
#include <crypto/scatterwalk.h>

+#include <crypto/hash.h>
+#include <crypto/md5.h>
+#include <crypto/sha.h>
+#include <crypto/internal/hash.h>
+
#define _SBF(s, v) ((v) << (s))

+#ifdef DEBUG
+
+static int flow_debug_logging;
+static int flow_debug_dump;
+
+/* from crypto/bcm/util.h */
+#define FLOW_LOG(...) \
+ do { \
+ if (flow_debug_logging) { \
+ printk(__VA_ARGS__); \
+ } \
+ } while (0)
+#define FLOW_DUMP(msg, var, var_len) \
+ do { \
+ if (flow_debug_dump) { \
+ print_hex_dump(KERN_ALERT, msg, DUMP_PREFIX_NONE, \
+ 16, 1, var, var_len, false); \
+ } \
+ } while (0)
+#else /* !DEBUG */
+
+#define FLOW_LOG(...) do {} while (0)
+#define FLOW_DUMP(msg, var, var_len) do {} while (0)
+
+#endif /* DEBUG */
+
/* Feed control registers */
#define SSS_REG_FCINTSTAT 0x0000
+#define SSS_FCINTSTAT_HPARTINT BIT(7)
+#define SSS_FCINTSTAT_HDONEINT BIT(5)
#define SSS_FCINTSTAT_BRDMAINT BIT(3)
#define SSS_FCINTSTAT_BTDMAINT BIT(2)
#define SSS_FCINTSTAT_HRDMAINT BIT(1)
#define SSS_FCINTSTAT_PKDMAINT BIT(0)

#define SSS_REG_FCINTENSET 0x0004
+#define SSS_FCINTENSET_HPARTINTENSET BIT(7)
+#define SSS_FCINTENSET_HDONEINTENSET BIT(5)
#define SSS_FCINTENSET_BRDMAINTENSET BIT(3)
#define SSS_FCINTENSET_BTDMAINTENSET BIT(2)
#define SSS_FCINTENSET_HRDMAINTENSET BIT(1)
#define SSS_FCINTENSET_PKDMAINTENSET BIT(0)

#define SSS_REG_FCINTENCLR 0x0008
+#define SSS_FCINTENCLR_HPARTINTENCLR BIT(7)
+#define SSS_FCINTENCLR_HDONEINTENCLR BIT(5)
#define SSS_FCINTENCLR_BRDMAINTENCLR BIT(3)
#define SSS_FCINTENCLR_BTDMAINTENCLR BIT(2)
#define SSS_FCINTENCLR_HRDMAINTENCLR BIT(1)
#define SSS_FCINTENCLR_PKDMAINTENCLR BIT(0)

#define SSS_REG_FCINTPEND 0x000C
+#define SSS_FCINTPEND_HPARTINTP BIT(7)
+#define SSS_FCINTPEND_HDONEINTP BIT(5)
#define SSS_FCINTPEND_BRDMAINTP BIT(3)
#define SSS_FCINTPEND_BTDMAINTP BIT(2)
#define SSS_FCINTPEND_HRDMAINTP BIT(1)
@@ -72,6 +114,7 @@
#define SSS_HASHIN_INDEPENDENT _SBF(0, 0x00)
#define SSS_HASHIN_CIPHER_INPUT _SBF(0, 0x01)
#define SSS_HASHIN_CIPHER_OUTPUT _SBF(0, 0x02)
+#define SSS_HASHIN_MASK _SBF(0, 0x03)

#define SSS_REG_FCBRDMAS 0x0020
#define SSS_REG_FCBRDMAL 0x0024
@@ -146,9 +189,119 @@
#define AES_KEY_LEN 16
#define CRYPTO_QUEUE_LEN 1

+/* HASH registers */
+#define SSS_REG_HASH_CTRL 0x00
+
+#define SSS_HASH_USER_IV_EN BIT(5)
+#define SSS_HASH_INIT_BIT BIT(4)
+#define SSS_HASH_ENGINE_SHA1 _SBF(1, 0x00)
+#define SSS_HASH_ENGINE_MD5 _SBF(1, 0x01)
+#define SSS_HASH_ENGINE_SHA256 _SBF(1, 0x02)
+
+#define SSS_HASH_ENGINE_MASK _SBF(1, 0x03)
+
+#define SSS_REG_HASH_CTRL_PAUSE 0x04
+
+#define SSS_HASH_PAUSE BIT(0)
+
+#define SSS_REG_HASH_CTRL_FIFO 0x08
+
+#define SSS_HASH_FIFO_MODE_DMA BIT(0)
+#define SSS_HASH_FIFO_MODE_CPU 0
+
+#define SSS_REG_HASH_CTRL_SWAP 0x0c
+
+#define SSS_HASH_BYTESWAP_DI BIT(3)
+#define SSS_HASH_BYTESWAP_DO BIT(2)
+#define SSS_HASH_BYTESWAP_IV BIT(1)
+#define SSS_HASH_BYTESWAP_KEY BIT(0)
+
+#define SSS_REG_HASH_STATUS 0x10
+
+#define SSS_HASH_STATUS_MSG_DONE BIT(6)
+#define SSS_HASH_STATUS_PARTIAL_DONE BIT(4)
+#define SSS_HASH_STATUS_BUFFER_READY BIT(0)
+
+#define SSS_REG_HASH_MSG_SIZE_LOW 0x20
+#define SSS_REG_HASH_MSG_SIZE_HIGH 0x24
+
+#define SSS_REG_HASH_PRE_MSG_SIZE_LOW 0x28
+#define SSS_REG_HASH_PRE_MSG_SIZE_HIGH 0x2c
+
+#define SSS_REG_TYPE u32
+#define HASH_MAX_REG 16
+#define HASH_REG_SIZEOF sizeof(SSS_REG_TYPE)
+
+#define HASH_BLOCK_SIZE (HASH_MAX_REG*HASH_REG_SIZEOF)
+
+#define HASH_MD5_MAX_REG (MD5_DIGEST_SIZE / HASH_REG_SIZEOF)
+#define HASH_SHA1_MAX_REG (SHA1_DIGEST_SIZE / HASH_REG_SIZEOF)
+#define HASH_SHA256_MAX_REG (SHA256_DIGEST_SIZE / HASH_REG_SIZEOF)
+
+#define SSS_REG_HASH_IV(s) (0xB0 + ((s) << 2))
+#define SSS_REG_HASH_OUT(s) (0x100 + ((s) << 2))
+
+#define DEFAULT_TIMEOUT_INTERVAL HZ
+
+#define DEFAULT_AUTOSUSPEND_DELAY 1000
+
+/* HASH flags */
+#define HASH_FLAGS_BUSY 0
+#define HASH_FLAGS_FINAL 1
+#define HASH_FLAGS_DMA_ACTIVE 2
+#define HASH_FLAGS_OUTPUT_READY 3
+#define HASH_FLAGS_INIT 4
+#define HASH_FLAGS_DMA_READY 6
+
+#define HASH_FLAGS_SGS_COPIED 9
+#define HASH_FLAGS_SGS_ALLOCED 10
+/* HASH context flags */
+#define HASH_FLAGS_FINUP 16
+#define HASH_FLAGS_ERROR 17
+
+#define HASH_FLAGS_MODE_MD5 18
+#define HASH_FLAGS_MODE_SHA1 19
+#define HASH_FLAGS_MODE_SHA256 20
+
+#define HASH_FLAGS_MODE_MASK (BIT(18) | BIT(19) | BIT(20))
+/* HASH op codes */
+#define HASH_OP_UPDATE 1
+#define HASH_OP_FINAL 2
+
+/* HASH HW constants */
+#define HASH_ALIGN_MASK (HASH_BLOCK_SIZE-1)
+
+#define BUFLEN HASH_BLOCK_SIZE
+
+#define SSS_DMA_ALIGN 16
+#define SSS_ALIGNED __attribute__((aligned(SSS_DMA_ALIGN)))
+#define SSS_DMA_ALIGN_MASK (SSS_DMA_ALIGN-1)
+
+/* HASH queue constant */
+#define SSS_HASH_QUEUE_LENGTH 10
+
+/**
+ * struct sss_hash_algs_info - platform specific SSS HASH algorithms
+ * @algs_list: array of transformations (algorithms)
+ * @size: size
+ * @registered: counter used at probe/remove
+ *
+ * Specifies platform specific information about hash algorithms
+ * of SSS module.
+ */
+struct sss_hash_algs_info {
+ struct ahash_alg *algs_list;
+ unsigned int size;
+ unsigned int registered;
+};
+
/**
* struct samsung_aes_variant - platform specific SSS driver data
* @aes_offset: AES register offset from SSS module's base.
+ * @hash_offset: HASH register offset from SSS module's base.
+ *
+ * @hash_algs_info: HASH transformations provided by SS module
+ * @hash_algs_size: size of hash_algs_info
*
* Specifies platform specific configuration of SSS module.
* Note: A structure for driver specific platform data is used for future
@@ -156,6 +309,10 @@
*/
struct samsung_aes_variant {
unsigned int aes_offset;
+ unsigned int hash_offset;
+
+ struct sss_hash_algs_info *hash_algs_info;
+ unsigned int hash_algs_size;
};

struct s5p_aes_reqctx {
@@ -175,7 +332,7 @@ struct s5p_aes_ctx {
* @dev: Associated device
* @clk: Clock for accessing hardware
* @ioaddr: Mapped IO memory region
- * @aes_ioaddr: Per-varian offset for AES block IO memory
+ * @aes_ioaddr: Per-variant offset for AES block IO memory
* @irq_fc: Feed control interrupt line
* @req: Crypto request currently handled by the device
* @ctx: Configuration for currently handled crypto request
@@ -187,14 +344,28 @@ struct s5p_aes_ctx {
* with source data.
* @sg_dst_cpy: In case of unaligned access, copied scatter list
* with destination data.
- * @tasklet: New request scheduling jib
+ * @tasklet: New request scheduling job
* @queue: Crypto queue
* @busy: Indicates whether the device is currently handling some request
* thus it uses some of the fields from this state, like:
* req, ctx, sg_src/dst (and copies). This essentially
* protects against concurrent access to these fields.
* @lock: Lock for protecting both access to device hardware registers
- * and fields related to current request (including the busy field).
+ * and fields related to current request (including the busy
+ * field).
+ * @res: Resources for hash.
+ * @io_hash_base: Per-variant offset for HASH block IO memory.
+ * @hash_lock: Lock for protecting hash_req and other HASH variables.
+ * @hash_err: Error flags for current HASH op.
+ * @hash_tasklet: New HASH request scheduling job.
+ * @xmit_buf: Buffer for current HASH request transfer into SSS block.
+ * @hash_flags: Flags for current HASH op.
+ * @hash_queue: Async hash queue.
+ * @hash_req: Current request sending to SSS HASH block.
+ * @hash_sg_iter: Scatterlist transferred through DMA into SSS HASH block.
+ * @hash_sg_cnt: Counter for hash_sg_iter.
+ *
+ * @pdata: Per-variant algorithms for HASH ops.
*/
struct s5p_aes_dev {
struct device *dev;
@@ -215,16 +386,85 @@ struct s5p_aes_dev {
struct crypto_queue queue;
bool busy;
spinlock_t lock;
+
+ struct resource *res;
+ void __iomem *io_hash_base;
+
+ spinlock_t hash_lock;
+ int hash_err;
+ struct tasklet_struct hash_tasklet;
+ u8 xmit_buf[BUFLEN] SSS_ALIGNED;
+
+ unsigned long hash_flags;
+ struct crypto_queue hash_queue;
+ struct ahash_request *hash_req;
+ struct scatterlist *hash_sg_iter;
+ int hash_sg_cnt;
+
+ struct samsung_aes_variant *pdata;
};

-static struct s5p_aes_dev *s5p_dev;
+/**
+ * struct s5p_hash_reqctx - HASH request context
+ * @dev: Associated device
+ * @flags: Bits for current HASH request
+ * @op: Current request operation (OP_UPDATE or UP_FINAL)
+ * @digcnt: Number of bytes processed by HW (without buffer[] ones)
+ * @digest: Digest message or IV for partial result
+ * @bufcnt: Number of bytes holded in buffer[]
+ * @buflen: Max length of the input data buffer
+ * @nregs: Number of HW registers for digest or IV read/write.
+ * @engine: Flags for setting HASH SSS block.
+ * @sg: sg for DMA transfer.
+ * @sg_len: Length of sg for DMA transfer.
+ * @sgl[]: sg for joining buffer and req->src scatterlist.
+ * @skip: Skip offset in req->src for current op.
+ * @total: Total number of bytes for current request.
+ * @buffer[]: For byte(s) from end of req->src in UPDATE op.
+ */
+struct s5p_hash_reqctx {
+ struct s5p_aes_dev *dd;
+ unsigned long flags;
+ int op;
+
+ u64 digcnt;
+ u8 digest[SHA256_DIGEST_SIZE] SSS_ALIGNED;
+ u32 bufcnt;
+ u32 buflen;
+
+ int nregs; /* digest_size / sizeof(reg) */
+ u32 engine;
+
+ struct scatterlist *sg;
+ int sg_len;
+ struct scatterlist sgl[2];
+ int skip; /* skip offset in req->src sg */
+ unsigned int total; /* total request */
+
+ u8 buffer[0] SSS_ALIGNED;
+};
+
+/**
+ * struct s5p_hash_ctx - HASH transformation context
+ * @dd: Associated device
+ * @flags: Bits for algorithm HASH.
+ * @fallback: Software transformation for zero message or size < BUFLEN.
+ */
+struct s5p_hash_ctx {
+ struct s5p_aes_dev *dd;
+ unsigned long flags;
+ struct crypto_shash *fallback;
+};

-static const struct samsung_aes_variant s5p_aes_data = {
+static struct samsung_aes_variant s5p_aes_data = {
.aes_offset = 0x4000,
+ .hash_offset = 0x6000,
+ .hash_algs_size = 0,
};

-static const struct samsung_aes_variant exynos_aes_data = {
- .aes_offset = 0x200,
+static struct samsung_aes_variant exynos_aes_data = {
+ .aes_offset = 0x200,
+ .hash_offset = 0x400,
};

static const struct of_device_id s5p_sss_dt_match[] = {
@@ -254,6 +494,8 @@ static inline struct samsung_aes_variant *find_s5p_sss_version
platform_get_device_id(pdev)->driver_data;
}

+static struct s5p_aes_dev *s5p_dev;
+
static void s5p_set_dma_indata(struct s5p_aes_dev *dev, struct scatterlist *sg)
{
SSS_WRITE(dev, FCBRDMAS, sg_dma_address(sg));
@@ -436,19 +678,89 @@ static int s5p_aes_rx(struct s5p_aes_dev *dev/*, bool *set_dma*/)
return ret;
}

+static inline u32 s5p_hash_read(struct s5p_aes_dev *dd, u32 offset)
+{
+ return __raw_readl(dd->io_hash_base + offset);
+}
+
+static inline void s5p_hash_write(struct s5p_aes_dev *dd,
+ u32 offset, u32 value)
+{
+ __raw_writel(value, dd->io_hash_base + offset);
+}
+
+static inline void s5p_hash_write_mask(struct s5p_aes_dev *dd, u32 address,
+ u32 value, u32 mask)
+{
+ u32 val;
+
+ val = s5p_hash_read(dd, address);
+ val &= ~mask;
+ val |= value;
+ s5p_hash_write(dd, address, val);
+}
+
+/**
+ * s5p_set_dma_hashdata - start DMA with sg
+ * @dev: device
+ * @sg: scatterlist ready to DMA transmit
+ *
+ * decrement sg counter
+ * write addr and len into HASH regs
+ *
+ * DMA starts after writing length
+ */
+static void s5p_set_dma_hashdata(struct s5p_aes_dev *dev,
+ struct scatterlist *sg)
+{
+ FLOW_LOG("sg_cnt=%d, sg=%p len=%d", dev->hash_sg_cnt, sg, sg->length);
+ dev->hash_sg_cnt--;
+ WARN_ON(dev->hash_sg_cnt < 0);
+ WARN_ON(sg_dma_len(sg) <= 0);
+ SSS_WRITE(dev, FCHRDMAS, sg_dma_address(sg));
+ SSS_WRITE(dev, FCHRDMAL, sg_dma_len(sg)); /* DMA starts */
+}
+
+/**
+ * s5p_hash_rx - get next hash_sg_iter
+ * @dev: device
+ *
+ * Return:
+ * 2 if there is no more data,
+ * 1 if new receiving (input) data is ready and can be written to
+ * device
+ */
+static int s5p_hash_rx(struct s5p_aes_dev *dev)
+{
+ int ret = 2;
+
+ FLOW_LOG("hash_rx sg_cnt=%d", dev->hash_sg_cnt);
+ if (dev->hash_sg_cnt > 0) {
+ dev->hash_sg_iter = sg_next(dev->hash_sg_iter);
+ ret = 1;
+ } else {
+ set_bit(HASH_FLAGS_DMA_READY, &dev->hash_flags);
+ }
+
+ return ret;
+}
+
static irqreturn_t s5p_aes_interrupt(int irq, void *dev_id)
{
struct platform_device *pdev = dev_id;
struct s5p_aes_dev *dev = platform_get_drvdata(pdev);
int err_dma_tx = 0;
int err_dma_rx = 0;
+ int err_dma_hx = 0;
bool tx_end = false;
+ bool hx_end = false;
unsigned long flags;
- uint32_t status;
+ u32 status, st_bits;
int err;

- spin_lock_irqsave(&dev->lock, flags);
+ FLOW_LOG("s5p_sss: irq\n");

+ spin_lock_irqsave(&dev->lock, flags);
/*
* Handle rx or tx interrupt. If there is still data (scatterlist did not
* reach end), then map next scatterlist entry.
@@ -456,6 +768,8 @@ static irqreturn_t s5p_aes_interrupt(int irq, void *dev_id)
*
* If there is no more data in tx scatter list, call s5p_aes_complete()
* and schedule new tasklet.
+ *
+ * Handle hx interrupt. If there is still data map next entry.
*/
status = SSS_READ(dev, FCINTSTAT);
if (status & SSS_FCINTSTAT_BRDMAINT)
@@ -467,7 +781,33 @@ static irqreturn_t s5p_aes_interrupt(int irq, void *dev_id)
err_dma_tx = s5p_aes_tx(dev);
}

- SSS_WRITE(dev, FCINTPEND, status);
+ if (status & SSS_FCINTSTAT_HRDMAINT)
+ err_dma_hx = s5p_hash_rx(dev);
+
+ st_bits = status & (SSS_FCINTSTAT_BRDMAINT | SSS_FCINTSTAT_BTDMAINT |
+ SSS_FCINTSTAT_HRDMAINT);
+ /* clear DMA bits */
+ SSS_WRITE(dev, FCINTPEND, st_bits);
+
+ /* clear HASH irq bits */
+ if (status & (SSS_FCINTSTAT_HDONEINT | SSS_FCINTSTAT_HPARTINT)) {
+ /* cannot have both HPART and HDONE */
+ if (status & SSS_FCINTSTAT_HPARTINT) {
+ FLOW_LOG("s5p_sss: irq HPART\n");
+ st_bits = SSS_HASH_STATUS_PARTIAL_DONE;
+ }
+
+ if (status & SSS_FCINTSTAT_HDONEINT) {
+ FLOW_LOG("s5p_sss: irq HDONE\n");
+ st_bits = SSS_HASH_STATUS_MSG_DONE;
+ }
+
+ set_bit(HASH_FLAGS_OUTPUT_READY, &dev->hash_flags);
+ s5p_hash_write(dev, SSS_REG_HASH_STATUS, st_bits);
+ hx_end = true;
+ /* when DONE or PART, do not handle HASH DMA */
+ err_dma_hx = 0;
+ }

if (err_dma_rx < 0) {
err = err_dma_rx;
@@ -478,9 +818,13 @@ static irqreturn_t s5p_aes_interrupt(int irq, void *dev_id)
goto error;
}

+ FLOW_LOG("s5p_sss: hx_end=%d err_dma_hx=%d\n", hx_end, err_dma_hx);
if (tx_end) {
s5p_sg_done(dev);

+ if (err_dma_hx == 1)
+ s5p_set_dma_hashdata(dev, dev->hash_sg_iter);
+
spin_unlock_irqrestore(&dev->lock, flags);

s5p_aes_complete(dev, 0);
@@ -497,163 +841,1537 @@ static irqreturn_t s5p_aes_interrupt(int irq, void *dev_id)
s5p_set_dma_outdata(dev, dev->sg_dst);
if (err_dma_rx == 1)
s5p_set_dma_indata(dev, dev->sg_src);
+ if (err_dma_hx == 1)
+ s5p_set_dma_hashdata(dev, dev->hash_sg_iter);

spin_unlock_irqrestore(&dev->lock, flags);
}

- return IRQ_HANDLED;
+ goto hash_irq_end;

error:
s5p_sg_done(dev);
dev->busy = false;
+ if (err_dma_hx == 1)
+ s5p_set_dma_hashdata(dev, dev->hash_sg_iter);
+
spin_unlock_irqrestore(&dev->lock, flags);
s5p_aes_complete(dev, err);

+hash_irq_end:
+ /*
+ * Note about else if:
+ * when hash_sg_iter reaches end and its UPDATE op,
+ * issue SSS_HASH_PAUSE and wait for HPART irq
+ */
+ if (hx_end)
+ tasklet_schedule(&dev->hash_tasklet);
+ else if ((err_dma_hx == 2) &&
+ !test_bit(HASH_FLAGS_FINAL, &dev->hash_flags))
+ s5p_hash_write(dev, SSS_REG_HASH_CTRL_PAUSE,
+ SSS_HASH_PAUSE);
+
return IRQ_HANDLED;
}

-static void s5p_set_aes(struct s5p_aes_dev *dev,
- uint8_t *key, uint8_t *iv, unsigned int keylen)
+/**
+ * s5p_hash_wait - wait for HASH status bit
+ * @dd: secss device
+ * @offset: offset for HASH register
+ * @bit: status bit
+ */
+static inline int s5p_hash_wait(struct s5p_aes_dev *dd, u32 offset, u32 bit)
{
- void __iomem *keystart;
-
- if (iv)
- memcpy_toio(dev->aes_ioaddr + SSS_REG_AES_IV_DATA(0), iv, 0x10);
+ unsigned long timeout = jiffies + DEFAULT_TIMEOUT_INTERVAL;

- if (keylen == AES_KEYSIZE_256)
- keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(0);
- else if (keylen == AES_KEYSIZE_192)
- keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(2);
- else
- keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(4);
+ FLOW_LOG(__func__);
+ while (!(s5p_hash_read(dd, offset) & bit)) {
+ if (time_is_before_jiffies(timeout))
+ return -ETIMEDOUT;
+ }

- memcpy_toio(keystart, key, keylen);
+ return 0;
}

-static bool s5p_is_sg_aligned(struct scatterlist *sg)
+/**
+ * s5p_hash_read_msg - read message or IV from HW
+ * @req: AHASH request
+ */
+static void s5p_hash_read_msg(struct ahash_request *req)
{
- while (sg) {
- if (!IS_ALIGNED(sg->length, AES_BLOCK_SIZE))
- return false;
- sg = sg_next(sg);
- }
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+ struct s5p_aes_dev *dd = ctx->dd;
+ u32 *hash = (u32 *)ctx->digest;
+ int i;

- return true;
+ FLOW_LOG(__func__);
+ for (i = 0; i < ctx->nregs; i++)
+ hash[i] = s5p_hash_read(dd, SSS_REG_HASH_OUT(i));
}

-static int s5p_set_indata_start(struct s5p_aes_dev *dev,
- struct ablkcipher_request *req)
+/**
+ * s5p_hash_write_ctx_iv - write IV for next partial/finup op.
+ * @dd: device
+ * @ctx: request context
+ */
+static void s5p_hash_write_ctx_iv(struct s5p_aes_dev *dd,
+ struct s5p_hash_reqctx *ctx)
{
- struct scatterlist *sg;
- int err;
-
- dev->sg_src_cpy = NULL;
- sg = req->src;
- if (!s5p_is_sg_aligned(sg)) {
- dev_dbg(dev->dev,
- "At least one unaligned source scatter list, making a copy\n");
- err = s5p_make_sg_cpy(dev, sg, &dev->sg_src_cpy);
- if (err)
- return err;
-
- sg = dev->sg_src_cpy;
- }
-
- err = s5p_set_indata(dev, sg);
- if (err) {
- s5p_free_sg_cpy(dev, &dev->sg_src_cpy);
- return err;
- }
+ u32 *hash = (u32 *)ctx->digest;
+ int i;

- return 0;
+ FLOW_LOG(__func__);
+ for (i = 0; i < ctx->nregs; i++)
+ s5p_hash_write(dd, SSS_REG_HASH_IV(i), hash[i]);
}

-static int s5p_set_outdata_start(struct s5p_aes_dev *dev,
- struct ablkcipher_request *req)
+/**
+ * s5p_hash_write_iv - write IV for next partial/finup op.
+ * @req: AHASH request
+ */
+static void s5p_hash_write_iv(struct ahash_request *req)
{
- struct scatterlist *sg;
- int err;
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+ struct s5p_aes_dev *dd = ctx->dd;

- dev->sg_dst_cpy = NULL;
- sg = req->dst;
- if (!s5p_is_sg_aligned(sg)) {
- dev_dbg(dev->dev,
- "At least one unaligned dest scatter list, making a copy\n");
- err = s5p_make_sg_cpy(dev, sg, &dev->sg_dst_cpy);
- if (err)
- return err;
+ s5p_hash_write_ctx_iv(dd, ctx);
+}

- sg = dev->sg_dst_cpy;
- }
+/**
+ * s5p_hash_copy_result - copy digest into req->result
+ * @req: AHASH request
+ */
+static void s5p_hash_copy_result(struct ahash_request *req)
+{
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+ int d = ctx->nregs;

- err = s5p_set_outdata(dev, sg);
- if (err) {
- s5p_free_sg_cpy(dev, &dev->sg_dst_cpy);
- return err;
- }
+ FLOW_LOG(__func__);
+ if (!req->result)
+ return;

- return 0;
+ FLOW_DUMP("digest msg: ", ctx->digest, d * HASH_REG_SIZEOF);
+ memcpy(req->result, (u8 *)ctx->digest, d * HASH_REG_SIZEOF);
}

-static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode)
+/**
+ * s5p_hash_dma_flush - flush HASH DMA
+ * @dev: secss device
+ */
+static void s5p_hash_dma_flush(struct s5p_aes_dev *dev)
{
- struct ablkcipher_request *req = dev->req;
- uint32_t aes_control;
- unsigned long flags;
- int err;
-
- aes_control = SSS_AES_KEY_CHANGE_MODE;
- if (mode & FLAGS_AES_DECRYPT)
- aes_control |= SSS_AES_MODE_DECRYPT;
+ FLOW_LOG("s5p_sss: %s\n", __func__);
+ SSS_WRITE(dev, FCHRDMAC, SSS_FCHRDMAC_FLUSH);
+}

- if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CBC)
- aes_control |= SSS_AES_CHAIN_MODE_CBC;
- else if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CTR)
- aes_control |= SSS_AES_CHAIN_MODE_CTR;
+/**
+ * s5p_hash_dma_enable()
+ * @dev: secss device
+ *
+ * enable DMA mode for HASH
+ */
+static void s5p_hash_dma_enable(struct s5p_aes_dev *dev)
+{
+ FLOW_LOG("s5p_sss: %s\n", __func__);
+ s5p_hash_write(dev, SSS_REG_HASH_CTRL_FIFO, SSS_HASH_FIFO_MODE_DMA);
+}

- if (dev->ctx->keylen == AES_KEYSIZE_192)
- aes_control |= SSS_AES_KEY_SIZE_192;
- else if (dev->ctx->keylen == AES_KEYSIZE_256)
- aes_control |= SSS_AES_KEY_SIZE_256;
+/**
+ * s5p_hash_irq_disable - disable irq HASH signals
+ * @dev: secss device
+ * @flags: bitfield with irq's to be disabled
+ *
+ * SSS_FCINTENCLR_HRDMAINTENCLR
+ * SSS_FCINTENCLR_HDONEINTENCLR
+ * SSS_FCINTENCLR_HPARTINTENCLR
+ */
+static void s5p_hash_irq_disable(struct s5p_aes_dev *dev, u32 flags)
+{
+ FLOW_LOG("s5p_sss: %s\n", __func__);
+ SSS_WRITE(dev, FCINTENCLR, flags);
+}

- aes_control |= SSS_AES_FIFO_MODE;
+/**
+ * s5p_hash_irq_enable - enable irq signals
+ * @dev: secss device
+ * @flags: bitfield with irq's to be enabled
+ *
+ * SSS_FCINTENSET_HRDMAINTENSET
+ * SSS_FCINTENSET_HDONEINTENSET
+ * SSS_FCINTENSET_HPARTINTENSET
+ */
+static void s5p_hash_irq_enable(struct s5p_aes_dev *dev, int flags)
+{
+ FLOW_LOG("s5p_sss: %s\n", __func__);
+ SSS_WRITE(dev, FCINTENSET, flags);
+}

- /* as a variant it is possible to use byte swapping on DMA side */
- aes_control |= SSS_AES_BYTESWAP_DI
- | SSS_AES_BYTESWAP_DO
- | SSS_AES_BYTESWAP_IV
- | SSS_AES_BYTESWAP_KEY
- | SSS_AES_BYTESWAP_CNT;
+/**
+ * s5p_hash_set_flow()
+ * @dev: secss device
+ * @hashflow: HASH stream flow with/without crypto AES/DES
+ *
+ */
+static void s5p_hash_set_flow(struct s5p_aes_dev *dev, u32 hashflow)
+{
+ unsigned long flags;
+ u32 flow;

+ FLOW_LOG("s5p_sss: %s\n", __func__);
spin_lock_irqsave(&dev->lock, flags);

- SSS_WRITE(dev, FCINTENCLR,
- SSS_FCINTENCLR_BTDMAINTENCLR | SSS_FCINTENCLR_BRDMAINTENCLR);
- SSS_WRITE(dev, FCFIFOCTRL, 0x00);
+ flow = SSS_READ(dev, FCFIFOCTRL);

- err = s5p_set_indata_start(dev, req);
- if (err)
- goto indata_error;
+ hashflow &= SSS_HASHIN_MASK;
+ flow &= ~SSS_HASHIN_MASK;
+ flow |= hashflow;

- err = s5p_set_outdata_start(dev, req);
- if (err)
- goto outdata_error;
+ SSS_WRITE(dev, FCFIFOCTRL, hashflow);

- SSS_AES_WRITE(dev, AES_CONTROL, aes_control);
- s5p_set_aes(dev, dev->ctx->aes_key, req->info, dev->ctx->keylen);
+ spin_unlock_irqrestore(&dev->lock, flags);
+}

- s5p_set_dma_indata(dev, dev->sg_src);
- s5p_set_dma_outdata(dev, dev->sg_dst);
+/**
+ * s5p_ahash_dma_init -
+ * @dev: secss device
+ * @hashflow: HASH stream flow with/without AES/DES
+ *
+ * flush HASH DMA and enable DMA,
+ * set HASH stream flow inside SecSS HW
+ * enable HASH irq's HRDMA, HDONE, HPART
+ */
+static void s5p_ahash_dma_init(struct s5p_aes_dev *dev, u32 hashflow)
+{
+ FLOW_LOG("s5p_sss: %s\n", __func__);
+ s5p_hash_irq_disable(dev, SSS_FCINTENCLR_HRDMAINTENCLR |
+ SSS_FCINTENCLR_HDONEINTENCLR |
+ SSS_FCINTENCLR_HPARTINTENCLR);
+ s5p_hash_dma_flush(dev);

- SSS_WRITE(dev, FCINTENSET,
- SSS_FCINTENSET_BTDMAINTENSET | SSS_FCINTENSET_BRDMAINTENSET);
+/* SSS_WRITE(dev, FCHRDMAC, SSS_FCHRDMAC_BYTESWAP); swap on */

- spin_unlock_irqrestore(&dev->lock, flags);
+ s5p_hash_dma_enable(dev);
+ s5p_hash_set_flow(dev, hashflow);

- return;
+ s5p_hash_irq_enable(dev, SSS_FCINTENSET_HRDMAINTENSET |
+ SSS_FCINTENSET_HDONEINTENSET |
+ SSS_FCINTENSET_HPARTINTENSET);
+}

-outdata_error:
- s5p_unset_indata(dev);
+/**
+ * s5p_hash_hw_init -
+ * @dev: secss device
+ */
+static int s5p_hash_hw_init(struct s5p_aes_dev *dev)
+{
+ set_bit(HASH_FLAGS_INIT, &dev->hash_flags);
+ s5p_ahash_dma_init(dev, SSS_HASHIN_INDEPENDENT);
+
+ return 0;
+}
+
+/**
+ * s5p_hash_write_ctrl -
+ * @dd: secss device
+ * @length: length for request
+ * @final: 0=not final
+ *
+ * Prepare SSS HASH block for processing bytes in DMA mode.
+ * If it is called after previous updates, fill up IV words.
+ * For final, calculate and set lengths for SSS HASH so it can
+ * finalize hash.
+ * For partial, set SSS HASH length as 2^63 so it will be never
+ * reached and set to zero prelow and prehigh.
+ *
+ * This function do not start DMA transfer.
+ */
+static void s5p_hash_write_ctrl(struct s5p_aes_dev *dd, size_t length,
+ int final)
+{
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(dd->hash_req);
+ u32 configflags, swapflags;
+ u32 prelow, prehigh, low, high;
+ u64 tmplen;
+
+ FLOW_LOG("s5p_sss: %s engine: 0x%x digcnt=%lld\n", __func__,
+ ctx->engine, ctx->digcnt);
+ configflags = ctx->engine | SSS_HASH_INIT_BIT;
+
+ if (likely(ctx->digcnt)) {
+ s5p_hash_write_ctx_iv(dd, ctx);
+ configflags |= SSS_HASH_USER_IV_EN;
+ }
+
+ if (final) {
+ /* number of bytes for last part */
+ low = length; high = 0;
+ /* total number of bits prev hashed */
+ tmplen = ctx->digcnt * 8;
+ prelow = (u32)tmplen;
+ prehigh = (u32)(tmplen >> 32);
+ FLOW_LOG("s5p_sss: %s final, length=%d tmplen=%llx\n", __func__,
+ low, tmplen);
+ } else {
+ FLOW_LOG("s5p_sss: %s partial\n", __func__);
+ prelow = 0; prehigh = 0;
+ low = 0; high = BIT(31);
+ }
+
+ swapflags = SSS_HASH_BYTESWAP_DI | SSS_HASH_BYTESWAP_DO |
+ SSS_HASH_BYTESWAP_IV | SSS_HASH_BYTESWAP_KEY;
+
+ s5p_hash_write(dd, SSS_REG_HASH_MSG_SIZE_LOW, low);
+ s5p_hash_write(dd, SSS_REG_HASH_MSG_SIZE_HIGH, high);
+ s5p_hash_write(dd, SSS_REG_HASH_PRE_MSG_SIZE_LOW, prelow);
+ s5p_hash_write(dd, SSS_REG_HASH_PRE_MSG_SIZE_HIGH, prehigh);
+
+ s5p_hash_write(dd, SSS_REG_HASH_CTRL_SWAP, swapflags);
+ s5p_hash_write(dd, SSS_REG_HASH_CTRL, configflags);
+}
+
+/**
+ * s5p_hash_xmit_dma - start DMA hash processing
+ * @dd: secss device
+ * @length: length for request
+ * @final: 0=not final
+ *
+ * Map ctx->sg into DMA_TO_DEVICE,
+ * remember sg and cnt in device dd->hash_sg_iter, dd->hash_sg_cnt
+ * so it can be used in loop inside irq handler.
+ * Update ctx->digcnt, need this to keep number of processed bytes
+ * for last final/finup request.
+ * Set dma address and length, this starts DMA,
+ * return with -EINPROGRESS.
+ * HW HASH block will issue signal for irq handler.
+ */
+static int s5p_hash_xmit_dma(struct s5p_aes_dev *dd, size_t length,
+ int final)
+{
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(dd->hash_req);
+ int cnt;
+
+ dev_dbg(dd->dev, "xmit_dma: digcnt: %lld, length: %d, final: %d\n",
+ ctx->digcnt, length, final);
+
+ cnt = dma_map_sg(dd->dev, ctx->sg, ctx->sg_len, DMA_TO_DEVICE);
+ if (!cnt) {
+ dev_err(dd->dev, "dma_map_sg error\n");
+ set_bit(HASH_FLAGS_ERROR, &ctx->flags);
+ return -EINVAL;
+ }
+
+ FLOW_LOG("xmit_dma");
+ set_bit(HASH_FLAGS_DMA_ACTIVE, &dd->hash_flags);
+
+ dd->hash_sg_iter = ctx->sg;
+ dd->hash_sg_cnt = cnt;
+ FLOW_LOG("xmit_dma cnt=%d final=%d len=%d", cnt, final, length);
+
+ s5p_hash_write_ctrl(dd, length, final);
+
+ /* update digcnt in request */
+ ctx->digcnt += length;
+ ctx->total -= length;
+
+ /* catch last interrupt */
+ if (final)
+ set_bit(HASH_FLAGS_FINAL, &dd->hash_flags);
+
+ s5p_set_dma_hashdata(dd, dd->hash_sg_iter); /* DMA starts */
+
+ return -EINPROGRESS;
+}
+
+/**
+ * s5p_hash_copy_sgs -
+ * @ctx: request context
+ * @sg: source scatterlist request
+ * @bs: block size
+ * @new_len: number of bytes to process from sg
+ *
+ * Allocate new buffer, copy data for HASH into it.
+ * If there was xmit_buf filled, copy it first, then
+ * copy data from sg into it.
+ * Prepare one sgl[0] with allocated buffer.
+ *
+ * Set ctx->sg to sgl[0].
+ * Set flag so we can free it after irq ends processing.
+ */
+static int s5p_hash_copy_sgs(struct s5p_hash_reqctx *ctx,
+ struct scatterlist *sg, int bs, int new_len)
+{
+ int pages;
+ void *buf;
+ int len;
+
+ FLOW_LOG("copy_sgs new_len=%d", new_len);
+ len = new_len + ctx->bufcnt;
+
+ FLOW_LOG("copy_sgs len=%d", len);
+ pages = get_order(len); /* ctx->total); */
+
+ buf = (void *)__get_free_pages(GFP_ATOMIC, pages);
+ if (!buf) {
+ dev_err(ctx->dd->dev, "alloc pages for unaligned case.\n");
+ set_bit(HASH_FLAGS_ERROR, &ctx->flags);
+ return -ENOMEM;
+ }
+
+ if (ctx->bufcnt)
+ memcpy(buf, ctx->dd->xmit_buf, ctx->bufcnt);
+
+ scatterwalk_map_and_copy(buf + ctx->bufcnt, sg, ctx->skip,
+ new_len, 0);
+ sg_init_table(ctx->sgl, 1);
+ sg_set_buf(ctx->sgl, buf, len);
+ ctx->sg = ctx->sgl;
+ ctx->sg_len = 1;
+ ctx->bufcnt = 0;
+ ctx->skip = 0;
+ set_bit(HASH_FLAGS_SGS_COPIED, &ctx->dd->hash_flags);
+
+ return 0;
+}
+
+/**
+ * s5p_hash_copy_sg_lists -
+ * @rctx: request context
+ * @sg: source scatterlist request
+ * @bs: block size
+ * @new_len: number of bytes to process from sg
+ *
+ * Allocate new scatterlist table, copy data for HASH into it.
+ * If there was xmit_buf filled, prepare it first, then
+ * copy page, length and offset from source sg into it,
+ * adjusting begin and/or end for skip offset and hash_later value.
+ *
+ * Resulting sg table will be assigned to ctx->sg.
+ * Set flag so we can free it after irq ends processing.
+ */
+static int s5p_hash_copy_sg_lists(struct s5p_hash_reqctx *ctx,
+ struct scatterlist *sg, int bs, int new_len)
+{
+ int n = sg_nents(sg);
+ struct scatterlist *tmp;
+ int offset = ctx->skip;
+
+ FLOW_LOG("copy_sg_lists n=%d", n);
+ if (ctx->bufcnt)
+ n++;
+
+ FLOW_LOG("copy_sg_lists n=%d, alloc struct sg", n);
+ ctx->sg = kmalloc_array(n, sizeof(*sg), GFP_KERNEL);
+ if (!ctx->sg) {
+ dev_err(ctx->dd->dev, "alloc sg for unaligned case.\n");
+ set_bit(HASH_FLAGS_ERROR, &ctx->flags);
+ return -ENOMEM;
+ }
+
+ sg_init_table(ctx->sg, n);
+
+ tmp = ctx->sg;
+
+ ctx->sg_len = 0;
+
+ if (ctx->bufcnt) {
+ sg_set_buf(tmp, ctx->dd->xmit_buf, ctx->bufcnt);
+ tmp = sg_next(tmp);
+ ctx->sg_len++;
+ }
+
+ while (sg && new_len) {
+ int len = sg->length - offset;
+
+ if (offset) {
+ offset -= sg->length;
+ if (offset < 0)
+ offset = 0;
+ }
+
+ if (new_len < len)
+ len = new_len;
+
+ if (len > 0) {
+ new_len -= len;
+ sg_set_page(tmp, sg_page(sg), len, sg->offset);
+ if (new_len <= 0)
+ sg_mark_end(tmp);
+ tmp = sg_next(tmp);
+ ctx->sg_len++;
+ }
+
+ sg = sg_next(sg);
+ }
+
+ set_bit(HASH_FLAGS_SGS_ALLOCED, &ctx->dd->hash_flags);
+
+ ctx->bufcnt = 0;
+
+ return 0;
+}
+
+/**
+ * s5p_hash_prepare_sgs -
+ * @sg: source scatterlist request
+ * @nbytes: number of bytes to process from sg
+ * @bs: block size
+ * @final: final flag
+ * @rctx: request context
+ *
+ * Check two conditions: (1) if buffers in sg have len aligned data,
+ * and (2) sg table have good aligned elements (list_ok)
+ * If one of this checks fails, then either
+ * (1) allocates new buffer for data with s5p_hash_copy_sgs,
+ * copy data into this buffer and prepare request in sgl, or
+ * (2) allocates new sg table and prepare sg elements
+ *
+ * For digest or finup all conditions can be good, and we may not need
+ * any fixes.
+ */
+static int s5p_hash_prepare_sgs(struct scatterlist *sg,
+ int nbytes, int bs, bool final,
+ struct s5p_hash_reqctx *rctx)
+{
+ int n = 0;
+ bool aligned = true;
+ bool list_ok = true;
+ struct scatterlist *sg_tmp = sg;
+ int offset = rctx->skip;
+ int new_len;
+
+ FLOW_LOG("prepare_sgs nbytes=%d bs=%d, final=%d", nbytes, bs, final);
+ if (!sg || !sg->length || !nbytes)
+ return 0;
+
+ new_len = nbytes;
+
+ if (offset)
+ list_ok = false;
+
+ if (!final)
+ list_ok = false;
+
+ while (nbytes > 0 && sg_tmp) {
+ n++;
+
+ if (offset < sg_tmp->length) {
+#if 0
+ if (!IS_ALIGNED(offset + sg_tmp->offset, 4)) {
+ aligned = false;
+ break;
+ }
+#endif
+ if (!IS_ALIGNED(sg_tmp->length - offset, bs)) {
+ aligned = false;
+ break;
+ }
+ }
+
+ if (!sg_tmp->length) {
+ aligned = false;
+ break;
+ }
+
+ if (offset) {
+ offset -= sg_tmp->length;
+ if (offset < 0) {
+ nbytes += offset;
+ offset = 0;
+ }
+ } else {
+ nbytes -= sg_tmp->length;
+ }
+
+ sg_tmp = sg_next(sg_tmp);
+
+ if (nbytes < 0) { /* when hash_later is > 0 */
+ list_ok = false;
+ break;
+ }
+ }
+
+ if (!aligned)
+ return s5p_hash_copy_sgs(rctx, sg, bs, new_len);
+ else if (!list_ok)
+ return s5p_hash_copy_sg_lists(rctx, sg, bs, new_len);
+
+ /* have aligned data from previous operation and/or current
+ * Note: will enter here only if (digest or finup) and aligned
+ */
+ if (rctx->bufcnt) {
+ FLOW_LOG("prepare_sgs xmit_buf chained with sg sg_len=%d", n+1);
+ rctx->sg_len = n;
+ sg_init_table(rctx->sgl, 2);
+ sg_set_buf(rctx->sgl, rctx->dd->xmit_buf, rctx->bufcnt);
+ sg_chain(rctx->sgl, 2, sg);
+ rctx->sg = rctx->sgl;
+ rctx->sg_len++;
+ } else {
+ FLOW_LOG("prepare_sgs no xmit_buf, original sg sg_len=%d", n);
+ rctx->sg = sg;
+ rctx->sg_len = n;
+ }
+
+ return 0;
+}
+
+/**
+ * s5p_hash_prepare_request -
+ * @req: AHASH request
+ * @update: true if UPDATE op
+ *
+ * Note 1: we can have update flag _and_ final flag at the same time.
+ * Note 2: we enter here when digcnt > BUFLEN (=HASH_BLOCK_SIZE) or
+ * either req->nbytes or ctx->bufcnt + req->nbytes is > BUFLEN or
+ * we have final op
+ */
+static int s5p_hash_prepare_request(struct ahash_request *req, bool update)
+{
+ struct s5p_hash_reqctx *rctx = ahash_request_ctx(req);
+ int bs;
+ int ret;
+ int nbytes;
+ bool final = rctx->flags & BIT(HASH_FLAGS_FINUP);
+ int xmit_len, hash_later;
+
+ FLOW_LOG("prepare_req update=%d final=%d", update, final);
+ if (!req)
+ return 0;
+
+ bs = BUFLEN;
+
+ if (update)
+ nbytes = req->nbytes;
+ else
+ nbytes = 0;
+
+ rctx->total = nbytes + rctx->bufcnt;
+
+ FLOW_LOG("prepare_req total=%d", rctx->total);
+ if (!rctx->total)
+ return 0;
+
+ FLOW_LOG("prepare_req nbytes=%d bufcnt=%d", nbytes, rctx->bufcnt);
+ if (nbytes && (!IS_ALIGNED(rctx->bufcnt, BUFLEN))) {
+ /* bytes left from previous request, so fill up to BUFLEN */
+ int len = BUFLEN - rctx->bufcnt % BUFLEN;
+
+ FLOW_LOG("prepare_req fillup buffer, needed len=%d", len);
+ if (len > nbytes)
+ len = nbytes;
+ FLOW_LOG("prepare_req fillup, len=%d", len);
+ scatterwalk_map_and_copy(rctx->buffer + rctx->bufcnt, req->src,
+ 0, len, 0);
+ rctx->bufcnt += len;
+ nbytes -= len;
+ rctx->skip = len;
+ FLOW_LOG("prepare_req nbytes=%d bufcnt=%d skip=%d",
+ nbytes, rctx->bufcnt, rctx->skip);
+ } else {
+ rctx->skip = 0;
+ FLOW_LOG("prepare_req skip=%d", rctx->skip);
+ }
+
+ if (rctx->bufcnt)
+ memcpy(rctx->dd->xmit_buf, rctx->buffer, rctx->bufcnt);
+
+ xmit_len = rctx->total;
+ if (final) {
+ hash_later = 0;
+ FLOW_LOG("prepare_req final, zero hash_later");
+ } else {
+ if (IS_ALIGNED(xmit_len, bs))
+ xmit_len -= bs;
+ else
+ xmit_len -= xmit_len & (bs - 1);
+
+ hash_later = rctx->total - xmit_len;
+ WARN_ON(req->nbytes == 0);
+ WARN_ON(hash_later <= 0);
+ /* == if bufcnt was BUFLEN */
+ WARN_ON(req->nbytes < hash_later);
+ WARN_ON(rctx->skip > (req->nbytes - hash_later));
+ /* copy hash_later bytes from end of req->src */
+ /* previous bytes are in xmit_buf, so no overwrite */
+ FLOW_LOG("prepare_req copy tail to buffer, off=%d, count=%d",
+ req->nbytes - hash_later, hash_later);
+ scatterwalk_map_and_copy(rctx->buffer, req->src,
+ req->nbytes - hash_later,
+ hash_later, 0);
+ }
+
+ WARN_ON(hash_later < 0);
+ WARN_ON(nbytes < hash_later);
+
+ if (xmit_len > bs) {
+ FLOW_LOG("prepare_req xmit_len > bs %d %d", xmit_len, bs);
+ WARN_ON(nbytes <= hash_later);
+ ret = s5p_hash_prepare_sgs(req->src, nbytes - hash_later, bs,
+ final, rctx);
+ if (ret)
+ return ret;
+ } else {
+ /* have buffered data only */
+ FLOW_LOG("prepare_req data xmit_len=%d, bufcnt=%d",
+ xmit_len, rctx->bufcnt);
+ if (unlikely(!rctx->bufcnt)) {
+ /* first update didn't fill up buffer */
+ WARN_ON(xmit_len != BUFLEN);
+ scatterwalk_map_and_copy(rctx->dd->xmit_buf, req->src,
+ 0, xmit_len, 0);
+ }
+
+ sg_init_table(rctx->sgl, 1);
+ sg_set_buf(rctx->sgl, rctx->dd->xmit_buf, xmit_len);
+
+ rctx->sg = rctx->sgl;
+ rctx->sg_len = 1;
+ }
+
+ FLOW_LOG("prepare_req hash_later=%d", hash_later);
+ rctx->bufcnt = hash_later;
+ if (!final)
+ rctx->total = xmit_len;
+
+ return 0;
+}
+
+/**
+ * s5p_hash_update_dma_stop()
+ * @dd: secss device
+ *
+ * Unmap scatterlist ctx->sg.
+ */
+static int s5p_hash_update_dma_stop(struct s5p_aes_dev *dd)
+{
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(dd->hash_req);
+
+ dma_unmap_sg(dd->dev, ctx->sg, ctx->sg_len, DMA_TO_DEVICE);
+
+ clear_bit(HASH_FLAGS_DMA_ACTIVE, &dd->hash_flags);
+
+ return 0;
+}
+
+/**
+ * s5p_hash_update_req - process AHASH request
+ * @dd: device s5p_aes_dev
+ *
+ * Processes the input data from AHASH request using DMA
+ *
+ * Current request should have ctx->sg prepared before.
+ *
+ * Returns: see s5p_hash_final below.
+ */
+static int s5p_hash_update_req(struct s5p_aes_dev *dd)
+{
+ struct ahash_request *req = dd->hash_req;
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+ int err;
+ bool final = ctx->flags & BIT(HASH_FLAGS_FINUP);
+
+ dev_dbg(dd->dev, "update_req: total: %u, digcnt: %lld, finup: %d\n",
+ ctx->total, ctx->digcnt, final);
+
+ err = s5p_hash_xmit_dma(dd, ctx->total, final);
+
+ /* wait for dma completion before can take more data */
+ dev_dbg(dd->dev, "update: err: %d, digcnt: %lld\n", err, ctx->digcnt);
+
+ return err;
+}
+
+/**
+ * s5p_hash_final_req - process the final AHASH request
+ * @dd: device s5p_aes_dev
+ *
+ * Processes the input data from the last AHASH request
+ * using . Resets the buffer counter (ctx->bufcnt)
+ *
+ * Returns: see s5p_hash_final below.
+ */
+static int s5p_hash_final_req(struct s5p_aes_dev *dd)
+{
+ struct ahash_request *req = dd->hash_req;
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+ int err = 0;
+
+ err = s5p_hash_xmit_dma(dd, ctx->total, 1);
+ ctx->bufcnt = 0;
+ dev_dbg(dd->dev, "final_req: err: %d\n", err);
+
+ return err;
+}
+
+/**
+ * s5p_hash_finish - copy calculated digest to crypto layer
+ * @req: AHASH request
+ *
+ * Copies the calculated hash value to the buffer provided
+ * by req->result
+ *
+ * Returns 0 on success and negative values on error.
+ */
+static int s5p_hash_finish(struct ahash_request *req)
+{
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+ struct s5p_aes_dev *dd = ctx->dd;
+ int err = 0;
+
+ if (ctx->digcnt)
+ s5p_hash_copy_result(req);
+
+ dev_dbg(dd->dev, "digcnt: %lld, bufcnt: %d\n", ctx->digcnt,
+ ctx->bufcnt);
+
+ return err;
+}
+
+/**
+ * s5p_hash_finish_req - finish request
+ * @req: AHASH request
+ * @err: error
+ *
+ * Clear flags, free memory,
+ * if FINAL then read output into ctx->digest,
+ * call completetion
+ */
+static void s5p_hash_finish_req(struct ahash_request *req, int err)
+{
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+ struct s5p_aes_dev *dd = ctx->dd;
+
+ FLOW_LOG("s5p_sss: hash_finish_req\n");
+
+ if (test_bit(HASH_FLAGS_SGS_COPIED, &dd->hash_flags))
+ free_pages((unsigned long)sg_virt(ctx->sg),
+ get_order(ctx->sg->length));
+
+ if (test_bit(HASH_FLAGS_SGS_ALLOCED, &dd->hash_flags))
+ kfree(ctx->sg);
+
+ ctx->sg = NULL;
+
+ dd->hash_flags &= ~(BIT(HASH_FLAGS_SGS_ALLOCED) |
+ BIT(HASH_FLAGS_SGS_COPIED));
+
+ if (!err && !test_bit(HASH_FLAGS_ERROR, &ctx->flags)) {
+ FLOW_LOG("s5p_sss: hash__finish_req read msg\n");
+ s5p_hash_read_msg(req);
+ if (test_bit(HASH_FLAGS_FINAL, &dd->hash_flags))
+ err = s5p_hash_finish(req);
+ } else {
+ FLOW_LOG("s5p_sss: hash__finish_req error, no read msg\n");
+ ctx->flags |= BIT(HASH_FLAGS_ERROR);
+ }
+
+ /* atomic operation is not needed here */
+ dd->hash_flags &= ~(BIT(HASH_FLAGS_BUSY) | BIT(HASH_FLAGS_FINAL) |
+ BIT(HASH_FLAGS_DMA_READY) |
+ BIT(HASH_FLAGS_OUTPUT_READY));
+
+ if (req->base.complete)
+ req->base.complete(&req->base, err);
+}
+
+/**
+ * s5p_hash_handle_queue - handle hash queue
+ * @dd: device s5p_aes_dev
+ * @req: AHASH request
+ *
+ * If req!=NULL enqueue it
+ *
+ * Enqueues the current AHASH request on dd->queue and
+ * if FLAGS_BUSY is not set on the device then processes
+ * the first request from the dd->queue
+ *
+ * Returns: see s5p_hash_final below.
+ */
+static int s5p_hash_handle_queue(struct s5p_aes_dev *dd,
+ struct ahash_request *req)
+{
+ struct crypto_async_request *async_req, *backlog;
+ struct s5p_hash_reqctx *ctx;
+ unsigned long flags;
+ int err = 0, ret = 0;
+
+retry:
+ FLOW_LOG("s5p_sss: hash_handle_queue\n");
+ spin_lock_irqsave(&dd->hash_lock, flags);
+ if (req)
+ ret = ahash_enqueue_request(&dd->hash_queue, req);
+ if (test_bit(HASH_FLAGS_BUSY, &dd->hash_flags)) {
+ spin_unlock_irqrestore(&dd->hash_lock, flags);
+ FLOW_LOG("s5p_sss: hash_handle_queue - exit, busy\n");
+ return ret;
+ }
+ backlog = crypto_get_backlog(&dd->hash_queue);
+ async_req = crypto_dequeue_request(&dd->hash_queue);
+ if (async_req)
+ set_bit(HASH_FLAGS_BUSY, &dd->hash_flags);
+ spin_unlock_irqrestore(&dd->hash_lock, flags);
+
+ if (!async_req) {
+ FLOW_LOG("s5p_sss: hash_handle_queue - exit, empty\n");
+ return ret;
+ }
+
+ FLOW_LOG("s5p_sss: hash_handle_queue - backlog\n");
+ if (backlog)
+ backlog->complete(backlog, -EINPROGRESS);
+
+ FLOW_LOG("s5p_sss: hash_handle_queue - async_req\n");
+ req = ahash_request_cast(async_req);
+ dd->hash_req = req;
+ ctx = ahash_request_ctx(req);
+
+ FLOW_LOG("s5p_sss: hash_handle_queue - prepare_req\n");
+ err = s5p_hash_prepare_request(req, ctx->op == HASH_OP_UPDATE);
+ if (err || !ctx->total)
+ goto err1;
+
+ dev_dbg(dd->dev, "handling new req, op: %u, nbytes: %d\n",
+ ctx->op, req->nbytes);
+
+ err = s5p_hash_hw_init(dd);
+ if (err)
+ goto err1;
+
+ dd->hash_err = 0;
+ if (ctx->digcnt)
+ /* request has changed - restore hash */
+ s5p_hash_write_iv(req);
+
+ if (ctx->op == HASH_OP_UPDATE) {
+ FLOW_LOG("s5p_sss: hash_handle_queue - op=UPDATE, finup=%d\n",
+ (ctx->flags & BIT(HASH_FLAGS_FINUP)) != 0);
+ err = s5p_hash_update_req(dd);
+ if (err != -EINPROGRESS &&
+ (ctx->flags & BIT(HASH_FLAGS_FINUP)))
+ /* no final() after finup() */
+ err = s5p_hash_final_req(dd);
+ } else if (ctx->op == HASH_OP_FINAL) {
+ FLOW_LOG("s5p_sss: hash_handle_queue - op=FINAL\n");
+ err = s5p_hash_final_req(dd);
+ }
+err1:
+ dev_dbg(dd->dev, "exit, err: %d\n", err);
+
+ if (err != -EINPROGRESS) {
+ /* hash_tasklet_cb will not finish it, so do it here */
+ s5p_hash_finish_req(req, err);
+ req = NULL;
+
+ /*
+ * Execute next request immediately if there is anything
+ * in queue.
+ */
+ FLOW_LOG("s5p_sss: hash_handle_queue - retry\n");
+ goto retry;
+ }
+
+ FLOW_LOG("s5p_sss: hash_handle_queue - exit, ret=%d\n", ret);
+
+ return ret;
+}
+
+/**
+ * s5p_hash_tasklet_cb - hash tasklet
+ * @data: ptr to s5p_aes_dev
+ *
+ */
+static void s5p_hash_tasklet_cb(unsigned long data)
+{
+ struct s5p_aes_dev *dd = (struct s5p_aes_dev *)data;
+ int err = 0;
+
+ FLOW_LOG("s5p_sss: hash_tasklet\n");
+ if (!test_bit(HASH_FLAGS_BUSY, &dd->hash_flags)) {
+ FLOW_LOG("s5p_sss: hash_tasklet not BUSY, handle queue\n");
+ s5p_hash_handle_queue(dd, NULL);
+ return;
+ }
+
+ if (test_bit(HASH_FLAGS_DMA_READY, &dd->hash_flags)) {
+ FLOW_LOG("s5p_sss: hash_tasklet DMA_READY\n");
+ if (test_and_clear_bit(HASH_FLAGS_DMA_ACTIVE,
+ &dd->hash_flags)) {
+ FLOW_LOG("s5p_sss: hash_tasklet DMA_ACTIVE cleared\n");
+ s5p_hash_update_dma_stop(dd);
+ if (dd->hash_err) {
+ FLOW_LOG("s5p_sss: hash_tasklet hash_error\n");
+ err = dd->hash_err;
+ goto finish;
+ }
+ }
+ if (test_and_clear_bit(HASH_FLAGS_OUTPUT_READY,
+ &dd->hash_flags)) {
+ /* hash or semi-hash ready */
+ FLOW_LOG("s5p_sss: hash_tasklet OUTPUT_READY\n");
+ clear_bit(HASH_FLAGS_DMA_READY, &dd->hash_flags);
+ goto finish;
+ }
+ }
+
+ return;
+
+finish:
+ FLOW_LOG("s5p_sss: hash_tasklet finish\n");
+ dev_dbg(dd->dev, "update done: err: %d\n", err);
+ /* finish curent request */
+ s5p_hash_finish_req(dd->hash_req, err);
+
+ /* If we are not busy, process next req */
+ if (!test_bit(HASH_FLAGS_BUSY, &dd->hash_flags))
+ s5p_hash_handle_queue(dd, NULL);
+}
+
+/**
+ * s5p_hash_enqueue - enqueue request
+ * @req: AHASH request
+ * @op: operation UPDATE or FINAL
+ *
+ * Sets the operation flag in the AHASH request context
+ * structure and calls s5p_hash_handle_queue().
+ *
+ * Returns: see s5p_hash_final below.
+ */
+static int s5p_hash_enqueue(struct ahash_request *req, unsigned int op)
+{
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+ struct s5p_hash_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
+ struct s5p_aes_dev *dd = tctx->dd;
+
+ ctx->op = op;
+
+ return s5p_hash_handle_queue(dd, req);
+}
+
+/**
+ * s5p_hash_update - process the hash input data
+ * @req: AHASH request
+ *
+ * If request will fit in buffer, copy it and return immediately
+ * else enqueue it wit OP_UPDATE.
+ *
+ * Returns: see s5p_hash_final below.
+ */
+static int s5p_hash_update(struct ahash_request *req)
+{
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+
+ FLOW_LOG("hash update len=%d", req->nbytes);
+ if (!req->nbytes)
+ return 0;
+
+ FLOW_DUMP("upd: ", req->src, req->nbytes);
+ if (ctx->bufcnt + req->nbytes <= BUFLEN) {
+ scatterwalk_map_and_copy(ctx->buffer + ctx->bufcnt, req->src,
+ 0, req->nbytes, 0);
+ ctx->bufcnt += req->nbytes;
+ return 0;
+ }
+
+ return s5p_hash_enqueue(req, HASH_OP_UPDATE);
+}
+
+/**
+ * s5p_hash_shash_digest - calculate shash digest
+ * @tfm: crypto transformation
+ * @flags: tfm flags
+ * @data: input data
+ * @len: length of data
+ * @out: output buffer
+ */
+static int s5p_hash_shash_digest(struct crypto_shash *tfm, u32 flags,
+ const u8 *data, unsigned int len, u8 *out)
+{
+ SHASH_DESC_ON_STACK(shash, tfm);
+
+ shash->tfm = tfm;
+ shash->flags = flags & CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ return crypto_shash_digest(shash, data, len, out);
+}
+
+/**
+ * s5p_hash_final_shash - calculate shash digest
+ * @req: AHASH request
+ *
+ * calculate digest from ctx->buffer,
+ * with data length ctx->bufcnt,
+ * store digest in req->result
+ */
+static int s5p_hash_final_shash(struct ahash_request *req)
+{
+ struct s5p_hash_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+
+ return s5p_hash_shash_digest(tctx->fallback, req->base.flags,
+ ctx->buffer, ctx->bufcnt, req->result);
+}
+
+/**
+ * s5p_hash_final - close up hash and calculate digest
+ * @req: AHASH request
+ *
+ * Set FLAGS_FINUP flag for the current AHASH request context.
+ *
+ * If there were no input data processed yet and the buffered
+ * hash data is less than BUFLEN (64) then calculate the final
+ * hash immediately by using SW algorithm fallback.
+ *
+ * Otherwise enqueues the current AHASH request with OP_FINAL
+ * operation flag and finalize hash message in HW.
+ * Note that if digcnt!=0 then there were previous update op,
+ * so there are always some buffered bytes in ctx->buffer,
+ * which means that ctx->bufcnt!=0
+ *
+ * Returns:
+ * 0 if the request has been processed immediately,
+ * -EINPROGRESS if the operation has been queued for later
+ * execution or is set to processing by HW,
+ * -EBUSY if queue is full and request should be resubmitted later,
+ * other negative values on error.
+ *
+ * Note: req->src do not have any data
+ */
+static int s5p_hash_final(struct ahash_request *req)
+{
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+
+ FLOW_LOG("hash final");
+ ctx->flags |= BIT(HASH_FLAGS_FINUP);
+
+ if (ctx->flags & BIT(HASH_FLAGS_ERROR))
+ return -EINVAL; /* uncompleted hash is not needed */
+
+ /*
+ * If message is small (digcnt==0) and buffersize is less
+ * than BUFLEN, we use fallback, as using DMA + HW in this
+ * case doesn't provide any benefit.
+ * This is also the case for zero-length message.
+ */
+ FLOW_LOG("hash final digcnt=%lld bufcnt=%d", ctx->digcnt, ctx->bufcnt);
+ if (!ctx->digcnt && ctx->bufcnt < BUFLEN)
+ return s5p_hash_final_shash(req);
+
+ WARN_ON(ctx->bufcnt == 0);
+
+ return s5p_hash_enqueue(req, HASH_OP_FINAL);
+}
+
+/**
+ * s5p_hash_finup - process last req->src and calculate digest
+ * @req: AHASH request containing the last update data
+ *
+ * Set FLAGS_FINUP flag in context.
+ *
+ * Call update(req) and exit if it was enqueued or is being processing.
+ *
+ * If update returns without enqueue, call final(req).
+ *
+ * Return values: see s5p_hash_final above.
+ */
+static int s5p_hash_finup(struct ahash_request *req)
+{
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+ int err1, err2;
+
+ FLOW_LOG("hash finup len=%d", req->nbytes);
+ ctx->flags |= BIT(HASH_FLAGS_FINUP);
+
+ FLOW_DUMP("fin: ", req->src, req->nbytes);
+ err1 = s5p_hash_update(req);
+ if (err1 == -EINPROGRESS || err1 == -EBUSY)
+ return err1;
+ /*
+ * final() has to be always called to cleanup resources
+ * even if update() failed, except EINPROGRESS
+ * or calculate digest for small size
+ */
+ err2 = s5p_hash_final(req);
+
+ return err1 ?: err2;
+}
+
+/**
+ * s5p_hash_init - initialize AHASH request contex
+ * @req: AHASH request
+ *
+ * Init async hash request context.
+ */
+static int s5p_hash_init(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct s5p_hash_ctx *tctx = crypto_ahash_ctx(tfm);
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+ struct s5p_aes_dev *dd = tctx->dd;
+
+ ctx->dd = dd;
+ ctx->flags = 0;
+
+ dev_dbg(dd->dev, "init: digest size: %d\n",
+ crypto_ahash_digestsize(tfm));
+
+ switch (crypto_ahash_digestsize(tfm)) {
+ case MD5_DIGEST_SIZE:
+ ctx->flags |= HASH_FLAGS_MODE_MD5;
+ ctx->engine = SSS_HASH_ENGINE_MD5;
+ ctx->nregs = HASH_MD5_MAX_REG;
+ break;
+ case SHA1_DIGEST_SIZE:
+ ctx->flags |= HASH_FLAGS_MODE_SHA1;
+ ctx->engine = SSS_HASH_ENGINE_SHA1;
+ ctx->nregs = HASH_SHA1_MAX_REG;
+ break;
+ case SHA256_DIGEST_SIZE:
+ ctx->flags |= HASH_FLAGS_MODE_SHA256;
+ ctx->engine = SSS_HASH_ENGINE_SHA256;
+ ctx->nregs = HASH_SHA256_MAX_REG;
+ break;
+ }
+
+ ctx->bufcnt = 0;
+ ctx->digcnt = 0;
+ ctx->total = 0;
+ ctx->skip = 0;
+ ctx->buflen = BUFLEN;
+
+ return 0;
+}
+
+/**
+ * s5p_hash_digest - calculate digest from req->src
+ * @req: AHASH request
+ *
+ * Return values: see s5p_hash_final above.
+ */
+static int s5p_hash_digest(struct ahash_request *req)
+{
+ FLOW_LOG("hash digest len=%d", req->nbytes);
+ FLOW_DUMP("dig: ", req->src, req->nbytes);
+
+ return s5p_hash_init(req) ?: s5p_hash_finup(req);
+}
+
+/**
+ * s5p_hash_cra_init_alg - init crypto alg transformation
+ * @tfm: crypto transformation
+ */
+static int s5p_hash_cra_init_alg(struct crypto_tfm *tfm)
+{
+ struct s5p_hash_ctx *tctx = crypto_tfm_ctx(tfm);
+ const char *alg_name = crypto_tfm_alg_name(tfm);
+
+ tctx->dd = s5p_dev;
+ /* Allocate a fallback and abort if it failed. */
+ tctx->fallback = crypto_alloc_shash(alg_name, 0,
+ CRYPTO_ALG_NEED_FALLBACK);
+ if (IS_ERR(tctx->fallback)) {
+ pr_err("fallback alloc fails for '%s'\n", alg_name);
+ return PTR_ERR(tctx->fallback);
+ }
+
+ crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
+ sizeof(struct s5p_hash_reqctx) + BUFLEN);
+
+ return 0;
+}
+
+/**
+ * s5p_hash_cra_init - init crypto tfm
+ * @tfm: crypto transformation
+ */
+static int s5p_hash_cra_init(struct crypto_tfm *tfm)
+{
+ return s5p_hash_cra_init_alg(tfm);
+}
+
+/**
+ * s5p_hash_cra_exit - exit crypto tfm
+ * @tfm: crypto transformation
+ *
+ * free allocated fallback
+ */
+static void s5p_hash_cra_exit(struct crypto_tfm *tfm)
+{
+ struct s5p_hash_ctx *tctx = crypto_tfm_ctx(tfm);
+
+ crypto_free_shash(tctx->fallback);
+ tctx->fallback = NULL;
+}
+
+/**
+ * s5p_hash_export - export hash state
+ * @req: AHASH request
+ * @out: buffer for exported state
+ */
+static int s5p_hash_export(struct ahash_request *req, void *out)
+{
+ struct s5p_hash_reqctx *rctx = ahash_request_ctx(req);
+
+ FLOW_LOG("hash export");
+ memcpy(out, rctx, sizeof(*rctx) + rctx->bufcnt);
+
+ return 0;
+}
+
+/**
+ * s5p_hash_import - import hash state
+ * @req: AHASH request
+ * @in: buffer with state to be imported from
+ */
+static int s5p_hash_import(struct ahash_request *req, const void *in)
+{
+ struct s5p_hash_reqctx *rctx = ahash_request_ctx(req);
+ const struct s5p_hash_reqctx *ctx_in = in;
+
+ FLOW_LOG("hash import");
+ WARN_ON(ctx_in->bufcnt < 0);
+ WARN_ON(ctx_in->bufcnt > BUFLEN);
+ memcpy(rctx, in, sizeof(*rctx) + BUFLEN);
+
+ return 0;
+}
+
+/**
+ * struct algs_sha1_md5
+ */
+static struct ahash_alg algs_sha1_md5[] = {
+{
+ .init = s5p_hash_init,
+ .update = s5p_hash_update,
+ .final = s5p_hash_final,
+ .finup = s5p_hash_finup,
+ .digest = s5p_hash_digest,
+ .halg.digestsize = SHA1_DIGEST_SIZE,
+ .halg.base = {
+ .cra_name = "sha1",
+ .cra_driver_name = "exynos-sha1",
+ .cra_priority = 100,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_KERN_DRIVER_ONLY |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_NEED_FALLBACK,
+ .cra_blocksize = HASH_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct s5p_hash_ctx),
+ .cra_alignmask = SSS_DMA_ALIGN_MASK,
+ .cra_module = THIS_MODULE,
+ .cra_init = s5p_hash_cra_init,
+ .cra_exit = s5p_hash_cra_exit,
+ }
+},
+{
+ .init = s5p_hash_init,
+ .update = s5p_hash_update,
+ .final = s5p_hash_final,
+ .finup = s5p_hash_finup,
+ .digest = s5p_hash_digest,
+ .halg.digestsize = MD5_DIGEST_SIZE,
+ .halg.base = {
+ .cra_name = "md5",
+ .cra_driver_name = "exynos-md5",
+ .cra_priority = 100,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_KERN_DRIVER_ONLY |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_NEED_FALLBACK,
+ .cra_blocksize = HASH_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct s5p_hash_ctx),
+ .cra_alignmask = SSS_DMA_ALIGN_MASK,
+ .cra_module = THIS_MODULE,
+ .cra_init = s5p_hash_cra_init,
+ .cra_exit = s5p_hash_cra_exit,
+ }
+}
+};
+
+/**
+ * struct algs_sha256
+ */
+static struct ahash_alg algs_sha256[] = {
+{
+ .init = s5p_hash_init,
+ .update = s5p_hash_update,
+ .final = s5p_hash_final,
+ .finup = s5p_hash_finup,
+ .digest = s5p_hash_digest,
+ .halg.digestsize = SHA256_DIGEST_SIZE,
+ .halg.base = {
+ .cra_name = "sha256",
+ .cra_driver_name = "exynos-sha256",
+ .cra_priority = 100,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_KERN_DRIVER_ONLY |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_NEED_FALLBACK,
+ .cra_blocksize = HASH_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct s5p_hash_ctx),
+ .cra_alignmask = SSS_DMA_ALIGN_MASK,
+ .cra_module = THIS_MODULE,
+ .cra_init = s5p_hash_cra_init,
+ .cra_exit = s5p_hash_cra_exit,
+ }
+}
+};
+
+/**
+ * struct exynos_hash_algs_info
+ */
+static struct sss_hash_algs_info exynos_hash_algs_info[] = {
+ {
+ .algs_list = algs_sha1_md5,
+ .size = ARRAY_SIZE(algs_sha1_md5),
+ },
+ {
+ .algs_list = algs_sha256,
+ .size = ARRAY_SIZE(algs_sha256),
+ },
+};
+
+static void s5p_set_aes(struct s5p_aes_dev *dev,
+ uint8_t *key, uint8_t *iv, unsigned int keylen)
+{
+ void __iomem *keystart;
+
+ if (iv)
+ memcpy_toio(dev->aes_ioaddr + SSS_REG_AES_IV_DATA(0), iv, 0x10);
+
+ if (keylen == AES_KEYSIZE_256)
+ keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(0);
+ else if (keylen == AES_KEYSIZE_192)
+ keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(2);
+ else
+ keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(4);
+
+ memcpy_toio(keystart, key, keylen);
+}
+
+static bool s5p_is_sg_aligned(struct scatterlist *sg)
+{
+ while (sg) {
+ if (!IS_ALIGNED(sg->length, AES_BLOCK_SIZE))
+ return false;
+ sg = sg_next(sg);
+ }
+
+ return true;
+}
+
+static int s5p_set_indata_start(struct s5p_aes_dev *dev,
+ struct ablkcipher_request *req)
+{
+ struct scatterlist *sg;
+ int err;
+
+ dev->sg_src_cpy = NULL;
+ sg = req->src;
+ if (!s5p_is_sg_aligned(sg)) {
+ dev_dbg(dev->dev,
+ "At least one unaligned source scatter list, making a copy\n");
+ err = s5p_make_sg_cpy(dev, sg, &dev->sg_src_cpy);
+ if (err)
+ return err;
+
+ sg = dev->sg_src_cpy;
+ }
+
+ err = s5p_set_indata(dev, sg);
+ if (err) {
+ s5p_free_sg_cpy(dev, &dev->sg_src_cpy);
+ return err;
+ }
+
+ return 0;
+}
+
+static int s5p_set_outdata_start(struct s5p_aes_dev *dev,
+ struct ablkcipher_request *req)
+{
+ struct scatterlist *sg;
+ int err;
+
+ dev->sg_dst_cpy = NULL;
+ sg = req->dst;
+ if (!s5p_is_sg_aligned(sg)) {
+ dev_dbg(dev->dev,
+ "At least one unaligned dest scatter list, making a copy\n");
+ err = s5p_make_sg_cpy(dev, sg, &dev->sg_dst_cpy);
+ if (err)
+ return err;
+
+ sg = dev->sg_dst_cpy;
+ }
+
+ err = s5p_set_outdata(dev, sg);
+ if (err) {
+ s5p_free_sg_cpy(dev, &dev->sg_dst_cpy);
+ return err;
+ }
+
+ return 0;
+}
+
+static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode)
+{
+ struct ablkcipher_request *req = dev->req;
+ uint32_t aes_control;
+ unsigned long flags;
+ int err;
+
+ aes_control = SSS_AES_KEY_CHANGE_MODE;
+ if (mode & FLAGS_AES_DECRYPT)
+ aes_control |= SSS_AES_MODE_DECRYPT;
+
+ if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CBC)
+ aes_control |= SSS_AES_CHAIN_MODE_CBC;
+ else if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CTR)
+ aes_control |= SSS_AES_CHAIN_MODE_CTR;
+
+ if (dev->ctx->keylen == AES_KEYSIZE_192)
+ aes_control |= SSS_AES_KEY_SIZE_192;
+ else if (dev->ctx->keylen == AES_KEYSIZE_256)
+ aes_control |= SSS_AES_KEY_SIZE_256;
+
+ aes_control |= SSS_AES_FIFO_MODE;
+
+ /* as a variant it is possible to use byte swapping on DMA side */
+ aes_control |= SSS_AES_BYTESWAP_DI
+ | SSS_AES_BYTESWAP_DO
+ | SSS_AES_BYTESWAP_IV
+ | SSS_AES_BYTESWAP_KEY
+ | SSS_AES_BYTESWAP_CNT;
+
+ spin_lock_irqsave(&dev->lock, flags);
+
+ SSS_WRITE(dev, FCINTENCLR,
+ SSS_FCINTENCLR_BTDMAINTENCLR | SSS_FCINTENCLR_BRDMAINTENCLR);
+ SSS_WRITE(dev, FCFIFOCTRL, 0x00);
+
+ err = s5p_set_indata_start(dev, req);
+ if (err)
+ goto indata_error;
+
+ err = s5p_set_outdata_start(dev, req);
+ if (err)
+ goto outdata_error;
+
+ SSS_AES_WRITE(dev, AES_CONTROL, aes_control);
+ s5p_set_aes(dev, dev->ctx->aes_key, req->info, dev->ctx->keylen);
+
+ s5p_set_dma_indata(dev, dev->sg_src);
+ s5p_set_dma_outdata(dev, dev->sg_dst);
+
+ SSS_WRITE(dev, FCINTENSET,
+ SSS_FCINTENSET_BTDMAINTENSET | SSS_FCINTENSET_BRDMAINTENSET);
+
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ return;
+
+outdata_error:
+ s5p_unset_indata(dev);

indata_error:
s5p_sg_done(dev);
@@ -822,13 +2540,16 @@ static struct crypto_alg algs[] = {
},
};

+bool use_hash;
+
static int s5p_aes_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- int i, j, err = -ENODEV;
+ int aes_i, hash_i, hash_algs_size = 0, j, err = -ENODEV;
struct samsung_aes_variant *variant;
struct s5p_aes_dev *pdata;
struct resource *res;
+ struct sss_hash_algs_info *hash_algs_i;

if (s5p_dev)
return -EEXIST;
@@ -837,12 +2558,38 @@ static int s5p_aes_probe(struct platform_device *pdev)
if (!pdata)
return -ENOMEM;

+ variant = find_s5p_sss_version(pdev);
+ pdata->pdata = variant;
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- pdata->ioaddr = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(pdata->ioaddr))
- return PTR_ERR(pdata->ioaddr);
+ /* HACK: HASH and PRNG uses the same registers in secss,
+ * avoid overwrite each other. This will drop HASH when
+ * CONFIG_EXYNOS_RNG is enabled.
+ * We need larger size for HASH registers in secss, current
+ * describe only AES/DES
+ */
+ if (variant == &exynos_aes_data) {
+ pdata->pdata->hash_algs_info = exynos_hash_algs_info;
+ pdata->pdata->hash_algs_size =
+ ARRAY_SIZE(exynos_hash_algs_info);
+#ifndef CONFIG_CRYPTO_DEV_EXYNOS_RNG
+ res->end += 0x300;
+ use_hash = true;
+#endif
+ }

- variant = find_s5p_sss_version(pdev);
+ pdata->res = res;
+ pdata->ioaddr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pdata->ioaddr)) {
+ if (!use_hash)
+ return PTR_ERR(pdata->ioaddr);
+ /* try AES without HASH */
+ res->end -= 0x300;
+ use_hash = false;
+ pdata->ioaddr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pdata->ioaddr))
+ return PTR_ERR(pdata->ioaddr);
+ }

pdata->clk = devm_clk_get(dev, "secss");
if (IS_ERR(pdata->clk)) {
@@ -857,8 +2604,10 @@ static int s5p_aes_probe(struct platform_device *pdev)
}

spin_lock_init(&pdata->lock);
+ spin_lock_init(&pdata->hash_lock);

pdata->aes_ioaddr = pdata->ioaddr + variant->aes_offset;
+ pdata->io_hash_base = pdata->ioaddr + variant->hash_offset;

pdata->irq_fc = platform_get_irq(pdev, 0);
if (pdata->irq_fc < 0) {
@@ -877,27 +2626,69 @@ static int s5p_aes_probe(struct platform_device *pdev)
pdata->busy = false;
pdata->dev = dev;
platform_set_drvdata(pdev, pdata);
+
s5p_dev = pdata;

tasklet_init(&pdata->tasklet, s5p_tasklet_cb, (unsigned long)pdata);
crypto_init_queue(&pdata->queue, CRYPTO_QUEUE_LEN);

- for (i = 0; i < ARRAY_SIZE(algs); i++) {
- err = crypto_register_alg(&algs[i]);
- if (err)
+ tasklet_init(&pdata->hash_tasklet, s5p_hash_tasklet_cb,
+ (unsigned long)pdata);
+ crypto_init_queue(&pdata->hash_queue, SSS_HASH_QUEUE_LENGTH);
+
+ for (aes_i = 0; aes_i < ARRAY_SIZE(algs); aes_i++) {
+ err = crypto_register_alg(&algs[aes_i]);
+ if (err) {
+ dev_err(dev, "can't register '%s': %d\n",
+ algs[aes_i].cra_name, err);
goto err_algs;
+ }
+ }
+
+ if (use_hash)
+ hash_algs_size = pdata->pdata->hash_algs_size;
+
+ for (hash_i = 0; hash_i < hash_algs_size; hash_i++) {
+ hash_algs_i = pdata->pdata->hash_algs_info;
+ hash_algs_i[hash_i].registered = 0;
+ for (j = 0; j < hash_algs_i[hash_i].size; j++) {
+ struct ahash_alg *alg;
+
+ alg = &(hash_algs_i[hash_i].algs_list[j]);
+ alg->export = s5p_hash_export;
+ alg->import = s5p_hash_import;
+ alg->halg.statesize = sizeof(struct s5p_hash_reqctx) +
+ BUFLEN;
+ err = crypto_register_ahash(alg);
+ if (err) {
+ dev_err(dev, "can't register '%s': %d\n",
+ alg->halg.base.cra_driver_name, err);
+ goto err_hash;
+ }
+ FLOW_LOG("alg registered: %s\n",
+ alg->halg.base.cra_driver_name);
+
+ hash_algs_i[hash_i].registered++;
+ }
}

dev_info(dev, "s5p-sss driver registered\n");

return 0;

+err_hash:
+ for (hash_i = hash_algs_size - 1; hash_i >= 0; hash_i--)
+ for (j = hash_algs_i[hash_i].registered - 1;
+ j >= 0; j--)
+ crypto_unregister_ahash(
+ &(hash_algs_i[hash_i].algs_list[j]));
+
err_algs:
- dev_err(dev, "can't register '%s': %d\n", algs[i].cra_name, err);

- for (j = 0; j < i; j++)
+ for (j = 0; j < aes_i; j++)
crypto_unregister_alg(&algs[j]);

+ tasklet_kill(&pdata->hash_tasklet);
tasklet_kill(&pdata->tasklet);

err_irq:
@@ -911,7 +2702,8 @@ static int s5p_aes_probe(struct platform_device *pdev)
static int s5p_aes_remove(struct platform_device *pdev)
{
struct s5p_aes_dev *pdata = platform_get_drvdata(pdev);
- int i;
+ struct sss_hash_algs_info *hash_algs_i;
+ int i, j;

if (!pdata)
return -ENODEV;
@@ -919,9 +2711,20 @@ static int s5p_aes_remove(struct platform_device *pdev)
for (i = 0; i < ARRAY_SIZE(algs); i++)
crypto_unregister_alg(&algs[i]);

+ hash_algs_i = pdata->pdata->hash_algs_info;
+ for (i = pdata->pdata->hash_algs_size - 1; i >= 0; i--)
+ for (j = hash_algs_i[i].registered - 1; j >= 0; j--)
+ crypto_unregister_ahash(
+ &(hash_algs_i[i].algs_list[j]));
+
+ tasklet_kill(&pdata->hash_tasklet);
tasklet_kill(&pdata->tasklet);

clk_disable_unprepare(pdata->clk);
+ if (use_hash) {
+ pdata->res->end -= 0x300;
+ use_hash = false;
+ }

s5p_dev = NULL;

@@ -942,3 +2745,4 @@ module_platform_driver(s5p_aes_crypto);
MODULE_DESCRIPTION("S5PV210 AES hw acceleration support.");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Vladimir Zapolskiy <vzapolskiy@gmail.com>");
+MODULE_AUTHOR("Kamil Konieczny <k.konieczny@partner.samsung.com>");
--
2.14.1.536.g6867272d5b56

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