[Feature] add GA346 baseline version
Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/drivers/crypto/s5p-sss.c b/src/kernel/linux/v4.19/drivers/crypto/s5p-sss.c
new file mode 100644
index 0000000..b721693
--- /dev/null
+++ b/src/kernel/linux/v4.19/drivers/crypto/s5p-sss.c
@@ -0,0 +1,2331 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Cryptographic API.
+//
+// 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.
+//
+// Hash part based on omap-sham.c driver.
+
+#include <linux/clk.h>
+#include <linux/crypto.h>
+#include <linux/dma-mapping.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/scatterlist.h>
+
+#include <crypto/ctr.h>
+#include <crypto/aes.h>
+#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))
+
+/* 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)
+#define SSS_FCINTPEND_PKDMAINTP BIT(0)
+
+#define SSS_REG_FCFIFOSTAT 0x0010
+#define SSS_FCFIFOSTAT_BRFIFOFUL BIT(7)
+#define SSS_FCFIFOSTAT_BRFIFOEMP BIT(6)
+#define SSS_FCFIFOSTAT_BTFIFOFUL BIT(5)
+#define SSS_FCFIFOSTAT_BTFIFOEMP BIT(4)
+#define SSS_FCFIFOSTAT_HRFIFOFUL BIT(3)
+#define SSS_FCFIFOSTAT_HRFIFOEMP BIT(2)
+#define SSS_FCFIFOSTAT_PKFIFOFUL BIT(1)
+#define SSS_FCFIFOSTAT_PKFIFOEMP BIT(0)
+
+#define SSS_REG_FCFIFOCTRL 0x0014
+#define SSS_FCFIFOCTRL_DESSEL BIT(2)
+#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
+#define SSS_REG_FCBRDMAC 0x0028
+#define SSS_FCBRDMAC_BYTESWAP BIT(1)
+#define SSS_FCBRDMAC_FLUSH BIT(0)
+
+#define SSS_REG_FCBTDMAS 0x0030
+#define SSS_REG_FCBTDMAL 0x0034
+#define SSS_REG_FCBTDMAC 0x0038
+#define SSS_FCBTDMAC_BYTESWAP BIT(1)
+#define SSS_FCBTDMAC_FLUSH BIT(0)
+
+#define SSS_REG_FCHRDMAS 0x0040
+#define SSS_REG_FCHRDMAL 0x0044
+#define SSS_REG_FCHRDMAC 0x0048
+#define SSS_FCHRDMAC_BYTESWAP BIT(1)
+#define SSS_FCHRDMAC_FLUSH BIT(0)
+
+#define SSS_REG_FCPKDMAS 0x0050
+#define SSS_REG_FCPKDMAL 0x0054
+#define SSS_REG_FCPKDMAC 0x0058
+#define SSS_FCPKDMAC_BYTESWAP BIT(3)
+#define SSS_FCPKDMAC_DESCEND BIT(2)
+#define SSS_FCPKDMAC_TRANSMIT BIT(1)
+#define SSS_FCPKDMAC_FLUSH BIT(0)
+
+#define SSS_REG_FCPKDMAO 0x005C
+
+/* AES registers */
+#define SSS_REG_AES_CONTROL 0x00
+#define SSS_AES_BYTESWAP_DI BIT(11)
+#define SSS_AES_BYTESWAP_DO BIT(10)
+#define SSS_AES_BYTESWAP_IV BIT(9)
+#define SSS_AES_BYTESWAP_CNT BIT(8)
+#define SSS_AES_BYTESWAP_KEY BIT(7)
+#define SSS_AES_KEY_CHANGE_MODE BIT(6)
+#define SSS_AES_KEY_SIZE_128 _SBF(4, 0x00)
+#define SSS_AES_KEY_SIZE_192 _SBF(4, 0x01)
+#define SSS_AES_KEY_SIZE_256 _SBF(4, 0x02)
+#define SSS_AES_FIFO_MODE BIT(3)
+#define SSS_AES_CHAIN_MODE_ECB _SBF(1, 0x00)
+#define SSS_AES_CHAIN_MODE_CBC _SBF(1, 0x01)
+#define SSS_AES_CHAIN_MODE_CTR _SBF(1, 0x02)
+#define SSS_AES_MODE_DECRYPT BIT(0)
+
+#define SSS_REG_AES_STATUS 0x04
+#define SSS_AES_BUSY BIT(2)
+#define SSS_AES_INPUT_READY BIT(1)
+#define SSS_AES_OUTPUT_READY BIT(0)
+
+#define SSS_REG_AES_IN_DATA(s) (0x10 + (s << 2))
+#define SSS_REG_AES_OUT_DATA(s) (0x20 + (s << 2))
+#define SSS_REG_AES_IV_DATA(s) (0x30 + (s << 2))
+#define SSS_REG_AES_CNT_DATA(s) (0x40 + (s << 2))
+#define SSS_REG_AES_KEY_DATA(s) (0x80 + (s << 2))
+
+#define SSS_REG(dev, reg) ((dev)->ioaddr + (SSS_REG_##reg))
+#define SSS_READ(dev, reg) __raw_readl(SSS_REG(dev, reg))
+#define SSS_WRITE(dev, reg, val) __raw_writel((val), SSS_REG(dev, reg))
+
+#define SSS_AES_REG(dev, reg) ((dev)->aes_ioaddr + SSS_REG_##reg)
+#define SSS_AES_WRITE(dev, reg, val) __raw_writel((val), \
+ SSS_AES_REG(dev, reg))
+
+/* HW engine modes */
+#define FLAGS_AES_DECRYPT BIT(0)
+#define FLAGS_AES_MODE_MASK _SBF(1, 0x03)
+#define FLAGS_AES_CBC _SBF(1, 0x01)
+#define FLAGS_AES_CTR _SBF(1, 0x02)
+
+#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_HASH_IV(s) (0xB0 + ((s) << 2))
+#define SSS_REG_HASH_OUT(s) (0x100 + ((s) << 2))
+
+#define HASH_BLOCK_SIZE 64
+#define HASH_REG_SIZEOF 4
+#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)
+
+/*
+ * HASH bit numbers, used by device, setting in dev->hash_flags with
+ * functions set_bit(), clear_bit() or tested with test_bit() or BIT(),
+ * to keep HASH state BUSY or FREE, or to signal state from irq_handler
+ * to hash_tasklet. SGS keep track of allocated memory for scatterlist
+ */
+#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_DMA_READY 4
+#define HASH_FLAGS_SGS_COPIED 5
+#define HASH_FLAGS_SGS_ALLOCED 6
+
+/* HASH HW constants */
+#define BUFLEN HASH_BLOCK_SIZE
+
+#define SSS_HASH_DMA_LEN_ALIGN 8
+#define SSS_HASH_DMA_ALIGN_MASK (SSS_HASH_DMA_LEN_ALIGN - 1)
+
+#define SSS_HASH_QUEUE_LENGTH 10
+
+/**
+ * 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.
+ *
+ * Specifies platform specific configuration of SSS module.
+ * Note: A structure for driver specific platform data is used for future
+ * expansion of its usage.
+ */
+struct samsung_aes_variant {
+ unsigned int aes_offset;
+ unsigned int hash_offset;
+};
+
+struct s5p_aes_reqctx {
+ unsigned long mode;
+};
+
+struct s5p_aes_ctx {
+ struct s5p_aes_dev *dev;
+
+ uint8_t aes_key[AES_MAX_KEY_SIZE];
+ uint8_t nonce[CTR_RFC3686_NONCE_SIZE];
+ int keylen;
+};
+
+/**
+ * struct s5p_aes_dev - Crypto device state container
+ * @dev: Associated device
+ * @clk: Clock for accessing hardware
+ * @ioaddr: Mapped IO memory region
+ * @aes_ioaddr: Per-varian 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
+ * @sg_src: Scatter list with source data for currently handled block
+ * in device. This is DMA-mapped into device.
+ * @sg_dst: Scatter list with destination data for currently handled block
+ * in device. This is DMA-mapped into device.
+ * @sg_src_cpy: In case of unaligned access, copied scatter list
+ * with source data.
+ * @sg_dst_cpy: In case of unaligned access, copied scatter list
+ * with destination data.
+ * @tasklet: New request scheduling jib
+ * @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).
+ * @res: Resources for hash.
+ * @io_hash_base: Per-variant offset for HASH block IO memory.
+ * @hash_lock: Lock for protecting hash_req, hash_queue and hash_flags
+ * variable.
+ * @hash_flags: Flags for current HASH op.
+ * @hash_queue: Async hash queue.
+ * @hash_tasklet: New HASH request scheduling job.
+ * @xmit_buf: Buffer for current HASH request transfer into SSS block.
+ * @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.
+ *
+ * @use_hash: true if HASH algs enabled
+ */
+struct s5p_aes_dev {
+ struct device *dev;
+ struct clk *clk;
+ void __iomem *ioaddr;
+ void __iomem *aes_ioaddr;
+ int irq_fc;
+
+ struct ablkcipher_request *req;
+ struct s5p_aes_ctx *ctx;
+ struct scatterlist *sg_src;
+ struct scatterlist *sg_dst;
+
+ struct scatterlist *sg_src_cpy;
+ struct scatterlist *sg_dst_cpy;
+
+ struct tasklet_struct tasklet;
+ struct crypto_queue queue;
+ bool busy;
+ spinlock_t lock;
+
+ struct resource *res;
+ void __iomem *io_hash_base;
+
+ spinlock_t hash_lock; /* protect hash_ vars */
+ unsigned long hash_flags;
+ struct crypto_queue hash_queue;
+ struct tasklet_struct hash_tasklet;
+
+ u8 xmit_buf[BUFLEN];
+ struct ahash_request *hash_req;
+ struct scatterlist *hash_sg_iter;
+ unsigned int hash_sg_cnt;
+
+ bool use_hash;
+};
+
+/**
+ * struct s5p_hash_reqctx - HASH request context
+ * @dd: Associated device
+ * @op_update: Current request operation (OP_UPDATE or OP_FINAL)
+ * @digcnt: Number of bytes processed by HW (without buffer[] ones)
+ * @digest: Digest message or IV for partial result
+ * @nregs: Number of HW registers for digest or IV read/write
+ * @engine: Bits for selecting type of HASH in 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
+ * @finup: Keep state for finup or final.
+ * @error: Keep track of error.
+ * @bufcnt: Number of bytes holded in buffer[]
+ * @buffer[]: For byte(s) from end of req->src in UPDATE op
+ */
+struct s5p_hash_reqctx {
+ struct s5p_aes_dev *dd;
+ bool op_update;
+
+ u64 digcnt;
+ u8 digest[SHA256_DIGEST_SIZE];
+
+ unsigned int nregs; /* digest_size / sizeof(reg) */
+ u32 engine;
+
+ struct scatterlist *sg;
+ unsigned int sg_len;
+ struct scatterlist sgl[2];
+ unsigned int skip;
+ unsigned int total;
+ bool finup;
+ bool error;
+
+ u32 bufcnt;
+ u8 buffer[0];
+};
+
+/**
+ * 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 = {
+ .aes_offset = 0x4000,
+ .hash_offset = 0x6000,
+};
+
+static const struct samsung_aes_variant exynos_aes_data = {
+ .aes_offset = 0x200,
+ .hash_offset = 0x400,
+};
+
+static const struct of_device_id s5p_sss_dt_match[] = {
+ {
+ .compatible = "samsung,s5pv210-secss",
+ .data = &s5p_aes_data,
+ },
+ {
+ .compatible = "samsung,exynos4210-secss",
+ .data = &exynos_aes_data,
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, s5p_sss_dt_match);
+
+static inline const struct samsung_aes_variant *find_s5p_sss_version
+ (const struct platform_device *pdev)
+{
+ if (IS_ENABLED(CONFIG_OF) && (pdev->dev.of_node)) {
+ const struct of_device_id *match;
+
+ match = of_match_node(s5p_sss_dt_match,
+ pdev->dev.of_node);
+ return (const struct samsung_aes_variant *)match->data;
+ }
+ return (const struct samsung_aes_variant *)
+ 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,
+ const struct scatterlist *sg)
+{
+ SSS_WRITE(dev, FCBRDMAS, sg_dma_address(sg));
+ SSS_WRITE(dev, FCBRDMAL, sg_dma_len(sg));
+}
+
+static void s5p_set_dma_outdata(struct s5p_aes_dev *dev,
+ const struct scatterlist *sg)
+{
+ SSS_WRITE(dev, FCBTDMAS, sg_dma_address(sg));
+ SSS_WRITE(dev, FCBTDMAL, sg_dma_len(sg));
+}
+
+static void s5p_free_sg_cpy(struct s5p_aes_dev *dev, struct scatterlist **sg)
+{
+ int len;
+
+ if (!*sg)
+ return;
+
+ len = ALIGN(dev->req->nbytes, AES_BLOCK_SIZE);
+ free_pages((unsigned long)sg_virt(*sg), get_order(len));
+
+ kfree(*sg);
+ *sg = NULL;
+}
+
+static void s5p_sg_copy_buf(void *buf, struct scatterlist *sg,
+ unsigned int nbytes, int out)
+{
+ struct scatter_walk walk;
+
+ if (!nbytes)
+ return;
+
+ scatterwalk_start(&walk, sg);
+ scatterwalk_copychunks(buf, &walk, nbytes, out);
+ scatterwalk_done(&walk, out, 0);
+}
+
+static void s5p_sg_done(struct s5p_aes_dev *dev)
+{
+ if (dev->sg_dst_cpy) {
+ dev_dbg(dev->dev,
+ "Copying %d bytes of output data back to original place\n",
+ dev->req->nbytes);
+ s5p_sg_copy_buf(sg_virt(dev->sg_dst_cpy), dev->req->dst,
+ dev->req->nbytes, 1);
+ }
+ s5p_free_sg_cpy(dev, &dev->sg_src_cpy);
+ s5p_free_sg_cpy(dev, &dev->sg_dst_cpy);
+}
+
+/* Calls the completion. Cannot be called with dev->lock hold. */
+static void s5p_aes_complete(struct ablkcipher_request *req, int err)
+{
+ req->base.complete(&req->base, err);
+}
+
+static void s5p_unset_outdata(struct s5p_aes_dev *dev)
+{
+ dma_unmap_sg(dev->dev, dev->sg_dst, 1, DMA_FROM_DEVICE);
+}
+
+static void s5p_unset_indata(struct s5p_aes_dev *dev)
+{
+ dma_unmap_sg(dev->dev, dev->sg_src, 1, DMA_TO_DEVICE);
+}
+
+static int s5p_make_sg_cpy(struct s5p_aes_dev *dev, struct scatterlist *src,
+ struct scatterlist **dst)
+{
+ void *pages;
+ int len;
+
+ *dst = kmalloc(sizeof(**dst), GFP_ATOMIC);
+ if (!*dst)
+ return -ENOMEM;
+
+ len = ALIGN(dev->req->nbytes, AES_BLOCK_SIZE);
+ pages = (void *)__get_free_pages(GFP_ATOMIC, get_order(len));
+ if (!pages) {
+ kfree(*dst);
+ *dst = NULL;
+ return -ENOMEM;
+ }
+
+ s5p_sg_copy_buf(pages, src, dev->req->nbytes, 0);
+
+ sg_init_table(*dst, 1);
+ sg_set_buf(*dst, pages, len);
+
+ return 0;
+}
+
+static int s5p_set_outdata(struct s5p_aes_dev *dev, struct scatterlist *sg)
+{
+ int err;
+
+ if (!sg->length) {
+ err = -EINVAL;
+ goto exit;
+ }
+
+ err = dma_map_sg(dev->dev, sg, 1, DMA_FROM_DEVICE);
+ if (!err) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ dev->sg_dst = sg;
+ err = 0;
+
+exit:
+ return err;
+}
+
+static int s5p_set_indata(struct s5p_aes_dev *dev, struct scatterlist *sg)
+{
+ int err;
+
+ if (!sg->length) {
+ err = -EINVAL;
+ goto exit;
+ }
+
+ err = dma_map_sg(dev->dev, sg, 1, DMA_TO_DEVICE);
+ if (!err) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ dev->sg_src = sg;
+ err = 0;
+
+exit:
+ return err;
+}
+
+/*
+ * Returns -ERRNO on error (mapping of new data failed).
+ * On success returns:
+ * - 0 if there is no more data,
+ * - 1 if new transmitting (output) data is ready and its address+length
+ * have to be written to device (by calling s5p_set_dma_outdata()).
+ */
+static int s5p_aes_tx(struct s5p_aes_dev *dev)
+{
+ int ret = 0;
+
+ s5p_unset_outdata(dev);
+
+ if (!sg_is_last(dev->sg_dst)) {
+ ret = s5p_set_outdata(dev, sg_next(dev->sg_dst));
+ if (!ret)
+ ret = 1;
+ }
+
+ return ret;
+}
+
+/*
+ * Returns -ERRNO on error (mapping of new data failed).
+ * On success returns:
+ * - 0 if there is no more data,
+ * - 1 if new receiving (input) data is ready and its address+length
+ * have to be written to device (by calling s5p_set_dma_indata()).
+ */
+static int s5p_aes_rx(struct s5p_aes_dev *dev/*, bool *set_dma*/)
+{
+ int ret = 0;
+
+ s5p_unset_indata(dev);
+
+ if (!sg_is_last(dev->sg_src)) {
+ ret = s5p_set_indata(dev, sg_next(dev->sg_src));
+ if (!ret)
+ ret = 1;
+ }
+
+ 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);
+}
+
+/**
+ * s5p_set_dma_hashdata() - start DMA with sg
+ * @dev: device
+ * @sg: scatterlist ready to DMA transmit
+ */
+static void s5p_set_dma_hashdata(struct s5p_aes_dev *dev,
+ const struct scatterlist *sg)
+{
+ dev->hash_sg_cnt--;
+ 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 and it is UPDATE op
+ * 1 if new receiving (input) data is ready and can be written to device
+ * 0 if there is no more data and it is FINAL op
+ */
+static int s5p_hash_rx(struct s5p_aes_dev *dev)
+{
+ if (dev->hash_sg_cnt > 0) {
+ dev->hash_sg_iter = sg_next(dev->hash_sg_iter);
+ return 1;
+ }
+
+ set_bit(HASH_FLAGS_DMA_READY, &dev->hash_flags);
+ if (test_bit(HASH_FLAGS_FINAL, &dev->hash_flags))
+ return 0;
+
+ return 2;
+}
+
+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);
+ struct ablkcipher_request *req;
+ 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 st_bits;
+ int err;
+
+ 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.
+ * In case of such mapping error, s5p_aes_complete() should be called.
+ *
+ * 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)
+ err_dma_rx = s5p_aes_rx(dev);
+
+ if (status & SSS_FCINTSTAT_BTDMAINT) {
+ if (sg_is_last(dev->sg_dst))
+ tx_end = true;
+ err_dma_tx = s5p_aes_tx(dev);
+ }
+
+ 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)
+ st_bits = SSS_HASH_STATUS_PARTIAL_DONE;
+
+ if (status & SSS_FCINTSTAT_HDONEINT)
+ 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;
+ goto error;
+ }
+ if (err_dma_tx < 0) {
+ err = err_dma_tx;
+ goto error;
+ }
+
+ 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->req, 0);
+ /* Device is still busy */
+ tasklet_schedule(&dev->tasklet);
+ } else {
+ /*
+ * Writing length of DMA block (either receiving or
+ * transmitting) will start the operation immediately, so this
+ * should be done at the end (even after clearing pending
+ * interrupts to not miss the interrupt).
+ */
+ if (err_dma_tx == 1)
+ 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);
+ }
+
+ goto hash_irq_end;
+
+error:
+ s5p_sg_done(dev);
+ dev->busy = false;
+ req = dev->req;
+ if (err_dma_hx == 1)
+ s5p_set_dma_hashdata(dev, dev->hash_sg_iter);
+
+ spin_unlock_irqrestore(&dev->lock, flags);
+ s5p_aes_complete(req, 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)
+ s5p_hash_write(dev, SSS_REG_HASH_CTRL_PAUSE,
+ SSS_HASH_PAUSE);
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * s5p_hash_read_msg() - read message or IV from HW
+ * @req: AHASH request
+ */
+static void s5p_hash_read_msg(struct ahash_request *req)
+{
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+ struct s5p_aes_dev *dd = ctx->dd;
+ u32 *hash = (u32 *)ctx->digest;
+ unsigned int i;
+
+ for (i = 0; i < ctx->nregs; i++)
+ hash[i] = s5p_hash_read(dd, SSS_REG_HASH_OUT(i));
+}
+
+/**
+ * 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,
+ const struct s5p_hash_reqctx *ctx)
+{
+ const u32 *hash = (const u32 *)ctx->digest;
+ unsigned int i;
+
+ for (i = 0; i < ctx->nregs; i++)
+ s5p_hash_write(dd, SSS_REG_HASH_IV(i), hash[i]);
+}
+
+/**
+ * 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 s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+
+ s5p_hash_write_ctx_iv(ctx->dd, ctx);
+}
+
+/**
+ * s5p_hash_copy_result() - copy digest into req->result
+ * @req: AHASH request
+ */
+static void s5p_hash_copy_result(struct ahash_request *req)
+{
+ const struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+
+ if (!req->result)
+ return;
+
+ memcpy(req->result, ctx->digest, ctx->nregs * HASH_REG_SIZEOF);
+}
+
+/**
+ * s5p_hash_dma_flush() - flush HASH DMA
+ * @dev: secss device
+ */
+static void s5p_hash_dma_flush(struct s5p_aes_dev *dev)
+{
+ SSS_WRITE(dev, FCHRDMAC, SSS_FCHRDMAC_FLUSH);
+}
+
+/**
+ * s5p_hash_dma_enable() - enable DMA mode for HASH
+ * @dev: secss device
+ *
+ * enable DMA mode for HASH
+ */
+static void s5p_hash_dma_enable(struct s5p_aes_dev *dev)
+{
+ s5p_hash_write(dev, SSS_REG_HASH_CTRL_FIFO, SSS_HASH_FIFO_MODE_DMA);
+}
+
+/**
+ * s5p_hash_irq_disable() - disable irq HASH signals
+ * @dev: secss device
+ * @flags: bitfield with irq's to be disabled
+ */
+static void s5p_hash_irq_disable(struct s5p_aes_dev *dev, u32 flags)
+{
+ SSS_WRITE(dev, FCINTENCLR, flags);
+}
+
+/**
+ * s5p_hash_irq_enable() - enable irq signals
+ * @dev: secss device
+ * @flags: bitfield with irq's to be enabled
+ */
+static void s5p_hash_irq_enable(struct s5p_aes_dev *dev, int flags)
+{
+ SSS_WRITE(dev, FCINTENSET, flags);
+}
+
+/**
+ * s5p_hash_set_flow() - set flow inside SecSS AES/DES with/without HASH
+ * @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;
+
+ spin_lock_irqsave(&dev->lock, flags);
+
+ flow = SSS_READ(dev, FCFIFOCTRL);
+ flow &= ~SSS_HASHIN_MASK;
+ flow |= hashflow;
+ SSS_WRITE(dev, FCFIFOCTRL, flow);
+
+ spin_unlock_irqrestore(&dev->lock, flags);
+}
+
+/**
+ * s5p_ahash_dma_init() - enable DMA and set HASH flow inside SecSS
+ * @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)
+{
+ s5p_hash_irq_disable(dev, SSS_FCINTENCLR_HRDMAINTENCLR |
+ SSS_FCINTENCLR_HDONEINTENCLR |
+ SSS_FCINTENCLR_HPARTINTENCLR);
+ s5p_hash_dma_flush(dev);
+
+ s5p_hash_dma_enable(dev);
+ s5p_hash_set_flow(dev, hashflow & SSS_HASHIN_MASK);
+ s5p_hash_irq_enable(dev, SSS_FCINTENSET_HRDMAINTENSET |
+ SSS_FCINTENSET_HDONEINTENSET |
+ SSS_FCINTENSET_HPARTINTENSET);
+}
+
+/**
+ * s5p_hash_write_ctrl() - prepare HASH block in SecSS for processing
+ * @dd: secss device
+ * @length: length for request
+ * @final: true if final op
+ *
+ * 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 HASH so SecSS 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 does not start DMA transfer.
+ */
+static void s5p_hash_write_ctrl(struct s5p_aes_dev *dd, size_t length,
+ bool final)
+{
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(dd->hash_req);
+ u32 prelow, prehigh, low, high;
+ u32 configflags, swapflags;
+ u64 tmplen;
+
+ 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);
+ } else {
+ 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: true if final op
+ *
+ * Update digcnt here, as it is needed for finup/final op.
+ */
+static int s5p_hash_xmit_dma(struct s5p_aes_dev *dd, size_t length,
+ bool final)
+{
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(dd->hash_req);
+ unsigned int cnt;
+
+ 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");
+ ctx->error = true;
+ return -EINVAL;
+ }
+
+ set_bit(HASH_FLAGS_DMA_ACTIVE, &dd->hash_flags);
+ dd->hash_sg_iter = ctx->sg;
+ dd->hash_sg_cnt = cnt;
+ s5p_hash_write_ctrl(dd, length, final);
+ 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() - copy request's bytes into new buffer
+ * @ctx: request context
+ * @sg: source scatterlist request
+ * @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 bit in dd->hash_flag so we can free it after irq ends processing.
+ */
+static int s5p_hash_copy_sgs(struct s5p_hash_reqctx *ctx,
+ struct scatterlist *sg, unsigned int new_len)
+{
+ unsigned int pages, len;
+ void *buf;
+
+ len = new_len + ctx->bufcnt;
+ pages = get_order(len);
+
+ buf = (void *)__get_free_pages(GFP_ATOMIC, pages);
+ if (!buf) {
+ dev_err(ctx->dd->dev, "alloc pages for unaligned case.\n");
+ ctx->error = true;
+ 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() - copy sg list and make fixes in copy
+ * @ctx: request context
+ * @sg: source scatterlist request
+ * @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, unsigned int new_len)
+{
+ unsigned int skip = ctx->skip, n = sg_nents(sg);
+ struct scatterlist *tmp;
+ unsigned int len;
+
+ if (ctx->bufcnt)
+ n++;
+
+ ctx->sg = kmalloc_array(n, sizeof(*sg), GFP_KERNEL);
+ if (!ctx->sg) {
+ ctx->error = true;
+ 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 && skip >= sg->length) {
+ skip -= sg->length;
+ sg = sg_next(sg);
+ }
+
+ while (sg && new_len) {
+ len = sg->length - skip;
+ if (new_len < len)
+ len = new_len;
+
+ new_len -= len;
+ sg_set_page(tmp, sg_page(sg), len, sg->offset + skip);
+ skip = 0;
+ 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);
+
+ return 0;
+}
+
+/**
+ * s5p_hash_prepare_sgs() - prepare sg for processing
+ * @ctx: request context
+ * @sg: source scatterlist request
+ * @nbytes: number of bytes to process from sg
+ * @final: final flag
+ *
+ * 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 s5p_hash_reqctx *ctx,
+ struct scatterlist *sg,
+ unsigned int new_len, bool final)
+{
+ unsigned int skip = ctx->skip, nbytes = new_len, n = 0;
+ bool aligned = true, list_ok = true;
+ struct scatterlist *sg_tmp = sg;
+
+ if (!sg || !sg->length || !new_len)
+ return 0;
+
+ if (skip || !final)
+ list_ok = false;
+
+ while (nbytes > 0 && sg_tmp) {
+ n++;
+ if (skip >= sg_tmp->length) {
+ skip -= sg_tmp->length;
+ if (!sg_tmp->length) {
+ aligned = false;
+ break;
+ }
+ } else {
+ if (!IS_ALIGNED(sg_tmp->length - skip, BUFLEN)) {
+ aligned = false;
+ break;
+ }
+
+ if (nbytes < sg_tmp->length - skip) {
+ list_ok = false;
+ break;
+ }
+
+ nbytes -= sg_tmp->length - skip;
+ skip = 0;
+ }
+
+ sg_tmp = sg_next(sg_tmp);
+ }
+
+ if (!aligned)
+ return s5p_hash_copy_sgs(ctx, sg, new_len);
+ else if (!list_ok)
+ return s5p_hash_copy_sg_lists(ctx, sg, new_len);
+
+ /*
+ * Have aligned data from previous operation and/or current
+ * Note: will enter here only if (digest or finup) and aligned
+ */
+ if (ctx->bufcnt) {
+ ctx->sg_len = n;
+ sg_init_table(ctx->sgl, 2);
+ sg_set_buf(ctx->sgl, ctx->dd->xmit_buf, ctx->bufcnt);
+ sg_chain(ctx->sgl, 2, sg);
+ ctx->sg = ctx->sgl;
+ ctx->sg_len++;
+ } else {
+ ctx->sg = sg;
+ ctx->sg_len = n;
+ }
+
+ return 0;
+}
+
+/**
+ * s5p_hash_prepare_request() - prepare request for processing
+ * @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 *ctx = ahash_request_ctx(req);
+ bool final = ctx->finup;
+ int xmit_len, hash_later, nbytes;
+ int ret;
+
+ if (update)
+ nbytes = req->nbytes;
+ else
+ nbytes = 0;
+
+ ctx->total = nbytes + ctx->bufcnt;
+ if (!ctx->total)
+ return 0;
+
+ if (nbytes && (!IS_ALIGNED(ctx->bufcnt, BUFLEN))) {
+ /* bytes left from previous request, so fill up to BUFLEN */
+ int len = BUFLEN - ctx->bufcnt % BUFLEN;
+
+ if (len > nbytes)
+ len = nbytes;
+
+ scatterwalk_map_and_copy(ctx->buffer + ctx->bufcnt, req->src,
+ 0, len, 0);
+ ctx->bufcnt += len;
+ nbytes -= len;
+ ctx->skip = len;
+ } else {
+ ctx->skip = 0;
+ }
+
+ if (ctx->bufcnt)
+ memcpy(ctx->dd->xmit_buf, ctx->buffer, ctx->bufcnt);
+
+ xmit_len = ctx->total;
+ if (final) {
+ hash_later = 0;
+ } else {
+ if (IS_ALIGNED(xmit_len, BUFLEN))
+ xmit_len -= BUFLEN;
+ else
+ xmit_len -= xmit_len & (BUFLEN - 1);
+
+ hash_later = ctx->total - xmit_len;
+ /* copy hash_later bytes from end of req->src */
+ /* previous bytes are in xmit_buf, so no overwrite */
+ scatterwalk_map_and_copy(ctx->buffer, req->src,
+ req->nbytes - hash_later,
+ hash_later, 0);
+ }
+
+ if (xmit_len > BUFLEN) {
+ ret = s5p_hash_prepare_sgs(ctx, req->src, nbytes - hash_later,
+ final);
+ if (ret)
+ return ret;
+ } else {
+ /* have buffered data only */
+ if (unlikely(!ctx->bufcnt)) {
+ /* first update didn't fill up buffer */
+ scatterwalk_map_and_copy(ctx->dd->xmit_buf, req->src,
+ 0, xmit_len, 0);
+ }
+
+ sg_init_table(ctx->sgl, 1);
+ sg_set_buf(ctx->sgl, ctx->dd->xmit_buf, xmit_len);
+
+ ctx->sg = ctx->sgl;
+ ctx->sg_len = 1;
+ }
+
+ ctx->bufcnt = hash_later;
+ if (!final)
+ ctx->total = xmit_len;
+
+ return 0;
+}
+
+/**
+ * s5p_hash_update_dma_stop() - unmap DMA
+ * @dd: secss device
+ *
+ * Unmap scatterlist ctx->sg.
+ */
+static void s5p_hash_update_dma_stop(struct s5p_aes_dev *dd)
+{
+ const 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);
+}
+
+/**
+ * s5p_hash_finish() - copy calculated digest to crypto layer
+ * @req: AHASH request
+ */
+static void s5p_hash_finish(struct ahash_request *req)
+{
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+ struct s5p_aes_dev *dd = ctx->dd;
+
+ if (ctx->digcnt)
+ s5p_hash_copy_result(req);
+
+ dev_dbg(dd->dev, "hash_finish digcnt: %lld\n", ctx->digcnt);
+}
+
+/**
+ * s5p_hash_finish_req() - finish request
+ * @req: AHASH request
+ * @err: error
+ */
+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;
+ unsigned long flags;
+
+ 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 && !ctx->error) {
+ s5p_hash_read_msg(req);
+ if (test_bit(HASH_FLAGS_FINAL, &dd->hash_flags))
+ s5p_hash_finish(req);
+ } else {
+ ctx->error = true;
+ }
+
+ spin_lock_irqsave(&dd->hash_lock, flags);
+ dd->hash_flags &= ~(BIT(HASH_FLAGS_BUSY) | BIT(HASH_FLAGS_FINAL) |
+ BIT(HASH_FLAGS_DMA_READY) |
+ BIT(HASH_FLAGS_OUTPUT_READY));
+ spin_unlock_irqrestore(&dd->hash_lock, flags);
+
+ 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 on dd->queue, 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:
+ 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);
+ 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)
+ return ret;
+
+ if (backlog)
+ backlog->complete(backlog, -EINPROGRESS);
+
+ req = ahash_request_cast(async_req);
+ dd->hash_req = req;
+ ctx = ahash_request_ctx(req);
+
+ err = s5p_hash_prepare_request(req, ctx->op_update);
+ if (err || !ctx->total)
+ goto out;
+
+ dev_dbg(dd->dev, "handling new req, op_update: %u, nbytes: %d\n",
+ ctx->op_update, req->nbytes);
+
+ s5p_ahash_dma_init(dd, SSS_HASHIN_INDEPENDENT);
+ if (ctx->digcnt)
+ s5p_hash_write_iv(req); /* restore hash IV */
+
+ if (ctx->op_update) { /* HASH_OP_UPDATE */
+ err = s5p_hash_xmit_dma(dd, ctx->total, ctx->finup);
+ if (err != -EINPROGRESS && ctx->finup && !ctx->error)
+ /* no final() after finup() */
+ err = s5p_hash_xmit_dma(dd, ctx->total, true);
+ } else { /* HASH_OP_FINAL */
+ err = s5p_hash_xmit_dma(dd, ctx->total, true);
+ }
+out:
+ 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.
+ */
+ goto retry;
+ }
+
+ 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;
+
+ if (!test_bit(HASH_FLAGS_BUSY, &dd->hash_flags)) {
+ s5p_hash_handle_queue(dd, NULL);
+ return;
+ }
+
+ if (test_bit(HASH_FLAGS_DMA_READY, &dd->hash_flags)) {
+ if (test_and_clear_bit(HASH_FLAGS_DMA_ACTIVE,
+ &dd->hash_flags)) {
+ s5p_hash_update_dma_stop(dd);
+ }
+
+ if (test_and_clear_bit(HASH_FLAGS_OUTPUT_READY,
+ &dd->hash_flags)) {
+ /* hash or semi-hash ready */
+ clear_bit(HASH_FLAGS_DMA_READY, &dd->hash_flags);
+ goto finish;
+ }
+ }
+
+ return;
+
+finish:
+ /* finish curent request */
+ s5p_hash_finish_req(dd->hash_req, 0);
+
+ /* 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 (true) or FINAL (false)
+ *
+ * Returns: see s5p_hash_final below.
+ */
+static int s5p_hash_enqueue(struct ahash_request *req, bool op)
+{
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+ struct s5p_hash_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
+
+ ctx->op_update = op;
+
+ return s5p_hash_handle_queue(tctx->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 with 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);
+
+ if (!req->nbytes)
+ return 0;
+
+ 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, true); /* 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
+ */
+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
+ *
+ * Note: in final req->src do not have any data, and req->nbytes can be
+ * non-zero.
+ *
+ * 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 op
+ * 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 denotes an error.
+ */
+static int s5p_hash_final(struct ahash_request *req)
+{
+ struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+
+ ctx->finup = true;
+ if (ctx->error)
+ return -EINVAL; /* uncompleted hash is not needed */
+
+ if (!ctx->digcnt && ctx->bufcnt < BUFLEN)
+ return s5p_hash_final_shash(req);
+
+ return s5p_hash_enqueue(req, false); /* HASH_OP_FINAL */
+}
+
+/**
+ * s5p_hash_finup() - process last req->src and calculate digest
+ * @req: AHASH request containing the last update data
+ *
+ * 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;
+
+ ctx->finup = true;
+
+ 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 s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct s5p_hash_ctx *tctx = crypto_ahash_ctx(tfm);
+
+ ctx->dd = tctx->dd;
+ ctx->error = false;
+ ctx->finup = false;
+ ctx->bufcnt = 0;
+ ctx->digcnt = 0;
+ ctx->total = 0;
+ ctx->skip = 0;
+
+ dev_dbg(tctx->dd->dev, "init: digest size: %d\n",
+ crypto_ahash_digestsize(tfm));
+
+ switch (crypto_ahash_digestsize(tfm)) {
+ case MD5_DIGEST_SIZE:
+ ctx->engine = SSS_HASH_ENGINE_MD5;
+ ctx->nregs = HASH_MD5_MAX_REG;
+ break;
+ case SHA1_DIGEST_SIZE:
+ ctx->engine = SSS_HASH_ENGINE_SHA1;
+ ctx->nregs = HASH_SHA1_MAX_REG;
+ break;
+ case SHA256_DIGEST_SIZE:
+ ctx->engine = SSS_HASH_ENGINE_SHA256;
+ ctx->nregs = HASH_SHA256_MAX_REG;
+ break;
+ default:
+ ctx->error = true;
+ return -EINVAL;
+ }
+
+ 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)
+{
+ 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)
+{
+ const struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
+
+ memcpy(out, ctx, sizeof(*ctx) + ctx->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 *ctx = ahash_request_ctx(req);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct s5p_hash_ctx *tctx = crypto_ahash_ctx(tfm);
+ const struct s5p_hash_reqctx *ctx_in = in;
+
+ memcpy(ctx, in, sizeof(*ctx) + BUFLEN);
+ if (ctx_in->bufcnt > BUFLEN) {
+ ctx->error = true;
+ return -EINVAL;
+ }
+
+ ctx->dd = tctx->dd;
+ ctx->error = false;
+
+ return 0;
+}
+
+static struct ahash_alg algs_sha1_md5_sha256[] = {
+{
+ .init = s5p_hash_init,
+ .update = s5p_hash_update,
+ .final = s5p_hash_final,
+ .finup = s5p_hash_finup,
+ .digest = s5p_hash_digest,
+ .export = s5p_hash_export,
+ .import = s5p_hash_import,
+ .halg.statesize = sizeof(struct s5p_hash_reqctx) + BUFLEN,
+ .halg.digestsize = SHA1_DIGEST_SIZE,
+ .halg.base = {
+ .cra_name = "sha1",
+ .cra_driver_name = "exynos-sha1",
+ .cra_priority = 100,
+ .cra_flags = 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_HASH_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,
+ .export = s5p_hash_export,
+ .import = s5p_hash_import,
+ .halg.statesize = sizeof(struct s5p_hash_reqctx) + BUFLEN,
+ .halg.digestsize = MD5_DIGEST_SIZE,
+ .halg.base = {
+ .cra_name = "md5",
+ .cra_driver_name = "exynos-md5",
+ .cra_priority = 100,
+ .cra_flags = 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_HASH_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,
+ .export = s5p_hash_export,
+ .import = s5p_hash_import,
+ .halg.statesize = sizeof(struct s5p_hash_reqctx) + BUFLEN,
+ .halg.digestsize = SHA256_DIGEST_SIZE,
+ .halg.base = {
+ .cra_name = "sha256",
+ .cra_driver_name = "exynos-sha256",
+ .cra_priority = 100,
+ .cra_flags = 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_HASH_DMA_ALIGN_MASK,
+ .cra_module = THIS_MODULE,
+ .cra_init = s5p_hash_cra_init,
+ .cra_exit = s5p_hash_cra_exit,
+ }
+}
+
+};
+
+static void s5p_set_aes(struct s5p_aes_dev *dev,
+ const uint8_t *key, const 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;
+ u8 *iv;
+
+ 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;
+ iv = req->info;
+ } else if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CTR) {
+ aes_control |= SSS_AES_CHAIN_MODE_CTR;
+ iv = req->info;
+ } else {
+ iv = NULL; /* AES_ECB */
+ }
+
+ 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, iv, 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);
+ dev->busy = false;
+ spin_unlock_irqrestore(&dev->lock, flags);
+ s5p_aes_complete(req, err);
+}
+
+static void s5p_tasklet_cb(unsigned long data)
+{
+ struct s5p_aes_dev *dev = (struct s5p_aes_dev *)data;
+ struct crypto_async_request *async_req, *backlog;
+ struct s5p_aes_reqctx *reqctx;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ backlog = crypto_get_backlog(&dev->queue);
+ async_req = crypto_dequeue_request(&dev->queue);
+
+ if (!async_req) {
+ dev->busy = false;
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return;
+ }
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ if (backlog)
+ backlog->complete(backlog, -EINPROGRESS);
+
+ dev->req = ablkcipher_request_cast(async_req);
+ dev->ctx = crypto_tfm_ctx(dev->req->base.tfm);
+ reqctx = ablkcipher_request_ctx(dev->req);
+
+ s5p_aes_crypt_start(dev, reqctx->mode);
+}
+
+static int s5p_aes_handle_req(struct s5p_aes_dev *dev,
+ struct ablkcipher_request *req)
+{
+ unsigned long flags;
+ int err;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ err = ablkcipher_enqueue_request(&dev->queue, req);
+ if (dev->busy) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ goto exit;
+ }
+ dev->busy = true;
+
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ tasklet_schedule(&dev->tasklet);
+
+exit:
+ return err;
+}
+
+static int s5p_aes_crypt(struct ablkcipher_request *req, unsigned long mode)
+{
+ struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
+ struct s5p_aes_reqctx *reqctx = ablkcipher_request_ctx(req);
+ struct s5p_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
+ struct s5p_aes_dev *dev = ctx->dev;
+
+ if (!IS_ALIGNED(req->nbytes, AES_BLOCK_SIZE)) {
+ dev_err(dev->dev, "request size is not exact amount of AES blocks\n");
+ return -EINVAL;
+ }
+
+ reqctx->mode = mode;
+
+ return s5p_aes_handle_req(dev, req);
+}
+
+static int s5p_aes_setkey(struct crypto_ablkcipher *cipher,
+ const uint8_t *key, unsigned int keylen)
+{
+ struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
+ struct s5p_aes_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ if (keylen != AES_KEYSIZE_128 &&
+ keylen != AES_KEYSIZE_192 &&
+ keylen != AES_KEYSIZE_256)
+ return -EINVAL;
+
+ memcpy(ctx->aes_key, key, keylen);
+ ctx->keylen = keylen;
+
+ return 0;
+}
+
+static int s5p_aes_ecb_encrypt(struct ablkcipher_request *req)
+{
+ return s5p_aes_crypt(req, 0);
+}
+
+static int s5p_aes_ecb_decrypt(struct ablkcipher_request *req)
+{
+ return s5p_aes_crypt(req, FLAGS_AES_DECRYPT);
+}
+
+static int s5p_aes_cbc_encrypt(struct ablkcipher_request *req)
+{
+ return s5p_aes_crypt(req, FLAGS_AES_CBC);
+}
+
+static int s5p_aes_cbc_decrypt(struct ablkcipher_request *req)
+{
+ return s5p_aes_crypt(req, FLAGS_AES_DECRYPT | FLAGS_AES_CBC);
+}
+
+static int s5p_aes_cra_init(struct crypto_tfm *tfm)
+{
+ struct s5p_aes_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ ctx->dev = s5p_dev;
+ tfm->crt_ablkcipher.reqsize = sizeof(struct s5p_aes_reqctx);
+
+ return 0;
+}
+
+static struct crypto_alg algs[] = {
+ {
+ .cra_name = "ecb(aes)",
+ .cra_driver_name = "ecb-aes-s5p",
+ .cra_priority = 100,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_KERN_DRIVER_ONLY,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct s5p_aes_ctx),
+ .cra_alignmask = 0x0f,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = s5p_aes_cra_init,
+ .cra_u.ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = s5p_aes_setkey,
+ .encrypt = s5p_aes_ecb_encrypt,
+ .decrypt = s5p_aes_ecb_decrypt,
+ }
+ },
+ {
+ .cra_name = "cbc(aes)",
+ .cra_driver_name = "cbc-aes-s5p",
+ .cra_priority = 100,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_KERN_DRIVER_ONLY,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct s5p_aes_ctx),
+ .cra_alignmask = 0x0f,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = s5p_aes_cra_init,
+ .cra_u.ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = s5p_aes_setkey,
+ .encrypt = s5p_aes_cbc_encrypt,
+ .decrypt = s5p_aes_cbc_decrypt,
+ }
+ },
+};
+
+static int s5p_aes_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ int i, j, err = -ENODEV;
+ const struct samsung_aes_variant *variant;
+ struct s5p_aes_dev *pdata;
+ struct resource *res;
+ unsigned int hash_i;
+
+ if (s5p_dev)
+ return -EEXIST;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ variant = find_s5p_sss_version(pdev);
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ /*
+ * Note: HASH and PRNG uses the same registers in secss, avoid
+ * overwrite each other. This will drop HASH when CONFIG_EXYNOS_RNG
+ * is enabled in config. We need larger size for HASH registers in
+ * secss, current describe only AES/DES
+ */
+ if (IS_ENABLED(CONFIG_CRYPTO_DEV_EXYNOS_HASH)) {
+ if (variant == &exynos_aes_data) {
+ res->end += 0x300;
+ pdata->use_hash = true;
+ }
+ }
+
+ pdata->res = res;
+ pdata->ioaddr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pdata->ioaddr)) {
+ if (!pdata->use_hash)
+ return PTR_ERR(pdata->ioaddr);
+ /* try AES without HASH */
+ res->end -= 0x300;
+ pdata->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)) {
+ dev_err(dev, "failed to find secss clock source\n");
+ return -ENOENT;
+ }
+
+ err = clk_prepare_enable(pdata->clk);
+ if (err < 0) {
+ dev_err(dev, "Enabling SSS clk failed, err %d\n", err);
+ return err;
+ }
+
+ 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) {
+ err = pdata->irq_fc;
+ dev_warn(dev, "feed control interrupt is not available.\n");
+ goto err_irq;
+ }
+ err = devm_request_threaded_irq(dev, pdata->irq_fc, NULL,
+ s5p_aes_interrupt, IRQF_ONESHOT,
+ pdev->name, pdev);
+ if (err < 0) {
+ dev_warn(dev, "feed control interrupt is not available.\n");
+ goto err_irq;
+ }
+
+ 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)
+ goto err_algs;
+ }
+
+ if (pdata->use_hash) {
+ tasklet_init(&pdata->hash_tasklet, s5p_hash_tasklet_cb,
+ (unsigned long)pdata);
+ crypto_init_queue(&pdata->hash_queue, SSS_HASH_QUEUE_LENGTH);
+
+ for (hash_i = 0; hash_i < ARRAY_SIZE(algs_sha1_md5_sha256);
+ hash_i++) {
+ struct ahash_alg *alg;
+
+ alg = &algs_sha1_md5_sha256[hash_i];
+ 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;
+ }
+ }
+ }
+
+ dev_info(dev, "s5p-sss driver registered\n");
+
+ return 0;
+
+err_hash:
+ for (j = hash_i - 1; j >= 0; j--)
+ crypto_unregister_ahash(&algs_sha1_md5_sha256[j]);
+
+ tasklet_kill(&pdata->hash_tasklet);
+ res->end -= 0x300;
+
+err_algs:
+ if (i < ARRAY_SIZE(algs))
+ dev_err(dev, "can't register '%s': %d\n", algs[i].cra_name,
+ err);
+
+ for (j = 0; j < i; j++)
+ crypto_unregister_alg(&algs[j]);
+
+ tasklet_kill(&pdata->tasklet);
+
+err_irq:
+ clk_disable_unprepare(pdata->clk);
+
+ s5p_dev = NULL;
+
+ return err;
+}
+
+static int s5p_aes_remove(struct platform_device *pdev)
+{
+ struct s5p_aes_dev *pdata = platform_get_drvdata(pdev);
+ int i;
+
+ if (!pdata)
+ return -ENODEV;
+
+ for (i = 0; i < ARRAY_SIZE(algs); i++)
+ crypto_unregister_alg(&algs[i]);
+
+ tasklet_kill(&pdata->tasklet);
+ if (pdata->use_hash) {
+ for (i = ARRAY_SIZE(algs_sha1_md5_sha256) - 1; i >= 0; i--)
+ crypto_unregister_ahash(&algs_sha1_md5_sha256[i]);
+
+ pdata->res->end -= 0x300;
+ tasklet_kill(&pdata->hash_tasklet);
+ pdata->use_hash = false;
+ }
+
+ clk_disable_unprepare(pdata->clk);
+ s5p_dev = NULL;
+
+ return 0;
+}
+
+static struct platform_driver s5p_aes_crypto = {
+ .probe = s5p_aes_probe,
+ .remove = s5p_aes_remove,
+ .driver = {
+ .name = "s5p-secss",
+ .of_match_table = s5p_sss_dt_match,
+ },
+};
+
+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>");