[PATCH 2/2] crypto: stm32 - Support for STM32 HASH module
From: Lionel Debieve
Date: Thu Jul 13 2017 - 09:33:53 EST
This module register a HASH module that support multiples
algorithms: MD5, SHA1, SHA224, SHA256.
It includes the support of HMAC hardware processing corresponding
to the supported algorithms. DMA or IRQ mode are used depending
on data length.
Signed-off-by: Lionel Debieve <lionel.debieve@xxxxxx>
---
drivers/crypto/stm32/Kconfig | 13 +
drivers/crypto/stm32/Makefile | 1 +
drivers/crypto/stm32/stm32-hash.c | 1576 +++++++++++++++++++++++++++++++++++++
3 files changed, 1590 insertions(+)
create mode 100644 drivers/crypto/stm32/stm32-hash.c
diff --git a/drivers/crypto/stm32/Kconfig b/drivers/crypto/stm32/Kconfig
index 7dd14f8..602332e 100644
--- a/drivers/crypto/stm32/Kconfig
+++ b/drivers/crypto/stm32/Kconfig
@@ -5,3 +5,16 @@ config CRC_DEV_STM32
help
This enables support for the CRC32 hw accelerator which can be found
on STMicroelectronics STM32 SOC.
+
+config HASH_DEV_STM32
+ tristate "Support for STM32 hash accelerators"
+ depends on ARCH_STM32
+ depends on HAS_DMA
+ select CRYPTO_HASH
+ select CRYPTO_MD5
+ select CRYPTO_SHA1
+ select CRYPTO_SHA256
+ select CRYPTO_ENGINE
+ help
+ This enables support for the HASH hw accelerator which can be found
+ on STMicroelectronics STM32 SOC.
diff --git a/drivers/crypto/stm32/Makefile b/drivers/crypto/stm32/Makefile
index 4db2f28..73cd56c 100644
--- a/drivers/crypto/stm32/Makefile
+++ b/drivers/crypto/stm32/Makefile
@@ -1 +1,2 @@
obj-$(CONFIG_CRC_DEV_STM32) += stm32_crc32.o
+obj-$(CONFIG_HASH_DEV_STM32) += stm32-hash.o
\ No newline at end of file
diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c
new file mode 100644
index 0000000..7bba90c
--- /dev/null
+++ b/drivers/crypto/stm32/stm32-hash.c
@@ -0,0 +1,1576 @@
+/*
+ * This file is part of STM32 Crypto driver for Linux.
+ *
+ * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
+ * Author(s): Lionel DEBIEVE <lionel.debieve@xxxxxx> for STMicroelectronics.
+ *
+ * License terms: GPL V2.0.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/crypto.h>
+#include <linux/delay.h>
+#include <linux/dmaengine.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+
+#include <crypto/engine.h>
+#include <crypto/hash.h>
+#include <crypto/md5.h>
+#include <crypto/scatterwalk.h>
+#include <crypto/sha.h>
+#include <crypto/internal/hash.h>
+
+#define HASH_CR 0x00
+#define HASH_DIN 0x04
+#define HASH_STR 0x08
+#define HASH_IMR 0x20
+#define HASH_SR 0x24
+#define HASH_CSR(x) (0x0F8 + ((x) * 0x04))
+#define HASH_HREG(x) (0x310 + ((x) * 0x04))
+#define HASH_HWCFGR 0x3F0
+#define HASH_VER 0x3F4
+#define HASH_ID 0x3F8
+
+/* Control Register */
+#define HASH_CR_INIT BIT(2)
+#define HASH_CR_DMAE BIT(3)
+#define HASH_CR_DATATYPE_POS 4
+#define HASH_CR_MODE BIT(6)
+#define HASH_CR_MDMAT BIT(13)
+#define HASH_CR_DMAA BIT(14)
+#define HASH_CR_LKEY BIT(16)
+
+#define HASH_CR_ALGO_SHA1 0x0
+#define HASH_CR_ALGO_MD5 0x80
+#define HASH_CR_ALGO_SHA224 0x40000
+#define HASH_CR_ALGO_SHA256 0x40080
+
+/* Interrupt */
+#define HASH_DINIE BIT(0)
+#define HASH_DCIE BIT(1)
+
+/* Interrupt Mask */
+#define HASH_MASK_CALC_COMPLETION BIT(0)
+#define HASH_MASK_DATA_INPUT BIT(1)
+
+/* Context swap register */
+#define HASH_CSR_REGISTER_NUMBER 53
+
+/* Status Flags */
+#define HASH_SR_DATA_INPUT_READY BIT(0)
+#define HASH_SR_OUTPUT_READY BIT(1)
+#define HASH_SR_DMA_ACTIVE BIT(2)
+#define HASH_SR_BUSY BIT(3)
+
+/* STR Register */
+#define HASH_STR_NBLW_MASK GENMASK(4, 0)
+#define HASH_STR_DCAL BIT(8)
+
+#define HASH_FLAGS_INIT BIT(0)
+#define HASH_FLAGS_OUTPUT_READY BIT(1)
+#define HASH_FLAGS_CPU BIT(2)
+#define HASH_FLAGS_DMA_READY BIT(3)
+#define HASH_FLAGS_DMA_ACTIVE BIT(4)
+#define HASH_FLAGS_HMAC_INIT BIT(5)
+#define HASH_FLAGS_HMAC_FINAL BIT(6)
+#define HASH_FLAGS_HMAC_KEY BIT(7)
+
+#define HASH_FLAGS_FINAL BIT(15)
+#define HASH_FLAGS_FINUP BIT(16)
+#define HASH_FLAGS_ALGO_MASK GENMASK(21, 18)
+#define HASH_FLAGS_MD5 BIT(18)
+#define HASH_FLAGS_SHA1 BIT(19)
+#define HASH_FLAGS_SHA224 BIT(20)
+#define HASH_FLAGS_SHA256 BIT(21)
+#define HASH_FLAGS_ERRORS BIT(22)
+#define HASH_FLAGS_HMAC BIT(23)
+
+#define HASH_OP_UPDATE 1
+#define HASH_OP_FINAL 2
+
+enum stm32_hash_data_format {
+ HASH_DATA_32_BITS = 0x0,
+ HASH_DATA_16_BITS = 0x1,
+ HASH_DATA_8_BITS = 0x2,
+ HASH_DATA_1_BIT = 0x3
+};
+
+#define HASH_BUFLEN 256
+#define HASH_LONG_KEY 64
+#define HASH_MAX_KEY_SIZE (SHA256_BLOCK_SIZE * 8)
+#define HASH_QUEUE_LENGTH 16
+#define HASH_DMA_THRESHOLD 50
+
+struct stm32_hash_ctx {
+ struct stm32_hash_dev *hdev;
+ unsigned long flags;
+
+ u8 key[HASH_MAX_KEY_SIZE];
+ int keylen;
+};
+
+struct stm32_hash_request_ctx {
+ struct stm32_hash_dev *hdev;
+ unsigned long flags;
+ unsigned long op;
+
+ u8 digest[SHA256_DIGEST_SIZE] __aligned(sizeof(u32));
+ size_t digcnt;
+ size_t bufcnt;
+ size_t buflen;
+
+ /* DMA */
+ struct scatterlist *sg;
+ unsigned int offset;
+ unsigned int total;
+ struct scatterlist sg_key;
+
+ dma_addr_t dma_addr;
+ size_t dma_ct;
+ int nents;
+
+ u8 data_type;
+
+ u8 buffer[HASH_BUFLEN] __aligned(sizeof(u32));
+
+ /* Export Context */
+ u32 *hw_context;
+};
+
+struct stm32_hash_algs_info {
+ struct ahash_alg *algs_list;
+ size_t size;
+};
+
+struct stm32_hash_pdata {
+ struct stm32_hash_algs_info *algs_info;
+ size_t algs_info_size;
+};
+
+struct stm32_hash_dev {
+ struct list_head list;
+ struct device *dev;
+ struct clk *clk;
+ struct reset_control *rst;
+ void __iomem *io_base;
+ phys_addr_t phys_base;
+ u32 dma_mode;
+ u32 dma_maxburst;
+
+ spinlock_t lock; /* lock to protect queue */
+
+ struct ahash_request *req;
+ struct crypto_engine *engine;
+
+ int err;
+ unsigned long flags;
+
+ struct dma_chan *dma_lch;
+ struct completion dma_completion;
+
+ const struct stm32_hash_pdata *pdata;
+};
+
+struct stm32_hash_drv {
+ struct list_head dev_list;
+ spinlock_t lock; /* List protection access */
+};
+
+static struct stm32_hash_drv stm32_hash = {
+ .dev_list = LIST_HEAD_INIT(stm32_hash.dev_list),
+ .lock = __SPIN_LOCK_UNLOCKED(stm32_hash.lock),
+};
+
+static void stm32_hash_dma_callback(void *param);
+
+static inline u32 stm32_hash_read(struct stm32_hash_dev *hdev, u32 offset)
+{
+ return readl_relaxed(hdev->io_base + offset);
+}
+
+static inline void stm32_hash_write(struct stm32_hash_dev *hdev,
+ u32 offset, u32 value)
+{
+ writel_relaxed(value, hdev->io_base + offset);
+}
+
+static inline int stm32_hash_wait_busy(struct stm32_hash_dev *hdev)
+{
+ u32 status;
+
+ return readl_relaxed_poll_timeout(hdev->io_base + HASH_SR, status,
+ !(status & HASH_SR_BUSY), 10, 10000);
+}
+
+static void stm32_hash_set_nblw(struct stm32_hash_dev *hdev, int length)
+{
+ u32 reg;
+
+ reg = stm32_hash_read(hdev, HASH_STR);
+ reg &= ~(HASH_STR_NBLW_MASK);
+ reg |= (8U * ((length) % 4U));
+ stm32_hash_write(hdev, HASH_STR, reg);
+}
+
+static int stm32_hash_write_key(struct stm32_hash_dev *hdev)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(hdev->req);
+ struct stm32_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+ u32 reg;
+ int keylen = ctx->keylen;
+ void *key = ctx->key;
+
+ if (keylen) {
+ stm32_hash_set_nblw(hdev, keylen);
+
+ while (keylen > 0) {
+ stm32_hash_write(hdev, HASH_DIN, *(u32 *)key);
+ keylen -= 4;
+ key += 4;
+ }
+
+ reg = stm32_hash_read(hdev, HASH_STR);
+ reg |= HASH_STR_DCAL;
+ stm32_hash_write(hdev, HASH_STR, reg);
+
+ return -EINPROGRESS;
+ }
+
+ return 0;
+}
+
+static void stm32_hash_write_ctrl(struct stm32_hash_dev *hdev)
+{
+ struct stm32_hash_request_ctx *rctx = ahash_request_ctx(hdev->req);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(hdev->req);
+ struct stm32_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+
+ u32 reg = HASH_CR_INIT;
+
+ if (!(hdev->flags & HASH_FLAGS_INIT)) {
+ switch (rctx->flags & HASH_FLAGS_ALGO_MASK) {
+ case HASH_FLAGS_MD5:
+ reg |= HASH_CR_ALGO_MD5;
+ break;
+ case HASH_FLAGS_SHA1:
+ reg |= HASH_CR_ALGO_SHA1;
+ break;
+ case HASH_FLAGS_SHA224:
+ reg |= HASH_CR_ALGO_SHA224;
+ break;
+ case HASH_FLAGS_SHA256:
+ reg |= HASH_CR_ALGO_SHA256;
+ break;
+ default:
+ reg |= HASH_CR_ALGO_MD5;
+ }
+
+ reg |= (rctx->data_type << HASH_CR_DATATYPE_POS);
+
+ if (rctx->flags & HASH_FLAGS_HMAC) {
+ hdev->flags |= HASH_FLAGS_HMAC;
+ reg |= HASH_CR_MODE;
+ if (ctx->keylen > HASH_LONG_KEY)
+ reg |= HASH_CR_LKEY;
+ }
+
+ stm32_hash_write(hdev, HASH_IMR, HASH_DCIE);
+
+ stm32_hash_write(hdev, HASH_CR, reg);
+
+ hdev->flags |= HASH_FLAGS_INIT;
+
+ dev_dbg(hdev->dev, "Write Control %x\n", reg);
+ }
+}
+
+static void stm32_hash_append_sg(struct stm32_hash_request_ctx *rctx)
+{
+ size_t count;
+
+ while ((rctx->bufcnt < rctx->buflen) && rctx->total) {
+ count = min(rctx->sg->length - rctx->offset, rctx->total);
+ count = min(count, rctx->buflen - rctx->bufcnt);
+
+ if (count <= 0) {
+ if ((rctx->sg->length == 0) && !sg_is_last(rctx->sg)) {
+ rctx->sg = sg_next(rctx->sg);
+ continue;
+ } else {
+ break;
+ }
+ }
+
+ scatterwalk_map_and_copy(rctx->buffer + rctx->bufcnt, rctx->sg,
+ rctx->offset, count, 0);
+
+ rctx->bufcnt += count;
+ rctx->offset += count;
+ rctx->total -= count;
+
+ if (rctx->offset == rctx->sg->length) {
+ rctx->sg = sg_next(rctx->sg);
+ if (rctx->sg)
+ rctx->offset = 0;
+ else
+ rctx->total = 0;
+ }
+ }
+}
+
+static int stm32_hash_xmit_cpu(struct stm32_hash_dev *hdev,
+ const u8 *buf, size_t length, int final)
+{
+ unsigned int count, len32;
+ const u32 *buffer = (const u32 *)buf;
+ u32 reg;
+
+ if (final)
+ hdev->flags |= HASH_FLAGS_FINAL;
+
+ len32 = DIV_ROUND_UP(length, sizeof(u32));
+
+ dev_dbg(hdev->dev, "%s: length: %d, final: %x len32 %i\n",
+ __func__, length, final, len32);
+
+ hdev->flags |= HASH_FLAGS_CPU;
+
+ stm32_hash_write_ctrl(hdev);
+
+ if (stm32_hash_wait_busy(hdev))
+ return -ETIMEDOUT;
+
+ if ((hdev->flags & HASH_FLAGS_HMAC) &&
+ (hdev->flags & ~HASH_FLAGS_HMAC_KEY)) {
+ hdev->flags |= HASH_FLAGS_HMAC_KEY;
+ stm32_hash_write_key(hdev);
+ if (stm32_hash_wait_busy(hdev))
+ return -ETIMEDOUT;
+ }
+
+ for (count = 0; count < len32; count++)
+ stm32_hash_write(hdev, HASH_DIN, buffer[count]);
+
+ if (final) {
+ stm32_hash_set_nblw(hdev, length);
+ reg = stm32_hash_read(hdev, HASH_STR);
+ reg |= HASH_STR_DCAL;
+ stm32_hash_write(hdev, HASH_STR, reg);
+ if (hdev->flags & HASH_FLAGS_HMAC) {
+ if (stm32_hash_wait_busy(hdev))
+ return -ETIMEDOUT;
+ stm32_hash_write_key(hdev);
+ }
+ return -EINPROGRESS;
+ }
+
+ return 0;
+}
+
+static int stm32_hash_update_cpu(struct stm32_hash_dev *hdev)
+{
+ struct stm32_hash_request_ctx *rctx = ahash_request_ctx(hdev->req);
+ int bufcnt, err = 0, final;
+
+ dev_dbg(hdev->dev, "%s flags %lx\n", __func__, rctx->flags);
+
+ final = (rctx->flags & HASH_FLAGS_FINUP);
+
+ while ((rctx->total >= rctx->buflen) ||
+ (rctx->bufcnt + rctx->total >= rctx->buflen)) {
+ stm32_hash_append_sg(rctx);
+ bufcnt = rctx->bufcnt;
+ rctx->bufcnt = 0;
+ err = stm32_hash_xmit_cpu(hdev, rctx->buffer, bufcnt, 0);
+ }
+
+ stm32_hash_append_sg(rctx);
+
+ if (final) {
+ bufcnt = rctx->bufcnt;
+ rctx->bufcnt = 0;
+ err = stm32_hash_xmit_cpu(hdev, rctx->buffer, bufcnt,
+ (rctx->flags & HASH_FLAGS_FINUP));
+ }
+
+ return err;
+}
+
+static int stm32_hash_xmit_dma(struct stm32_hash_dev *hdev,
+ struct scatterlist *sg, int length, int mdma)
+{
+ struct dma_async_tx_descriptor *in_desc;
+ dma_cookie_t cookie;
+ u32 reg;
+ int err;
+
+ in_desc = dmaengine_prep_slave_sg(hdev->dma_lch, sg, 1,
+ DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT |
+ DMA_CTRL_ACK);
+ if (!in_desc) {
+ dev_err(hdev->dev, "dmaengine_prep_slave error\n");
+ return -ENOMEM;
+ }
+
+ reinit_completion(&hdev->dma_completion);
+ in_desc->callback = stm32_hash_dma_callback;
+ in_desc->callback_param = hdev;
+
+ hdev->flags |= HASH_FLAGS_FINAL;
+ hdev->flags |= HASH_FLAGS_DMA_ACTIVE;
+
+ reg = stm32_hash_read(hdev, HASH_CR);
+
+ if (mdma)
+ reg |= HASH_CR_MDMAT;
+ else
+ reg &= ~HASH_CR_MDMAT;
+
+ reg |= HASH_CR_DMAE;
+
+ stm32_hash_write(hdev, HASH_CR, reg);
+
+ stm32_hash_set_nblw(hdev, length);
+
+ cookie = dmaengine_submit(in_desc);
+ err = dma_submit_error(cookie);
+ if (err)
+ return -ENOMEM;
+
+ dma_async_issue_pending(hdev->dma_lch);
+
+ if (!wait_for_completion_interruptible_timeout(&hdev->dma_completion,
+ msecs_to_jiffies(100)))
+ err = -ETIMEDOUT;
+
+ if (dma_async_is_tx_complete(hdev->dma_lch, cookie,
+ NULL, NULL) != DMA_COMPLETE)
+ err = -ETIMEDOUT;
+
+ if (err) {
+ dev_err(hdev->dev, "DMA Error %i\n", err);
+ dmaengine_terminate_all(hdev->dma_lch);
+ return err;
+ }
+
+ return -EINPROGRESS;
+}
+
+static void stm32_hash_dma_callback(void *param)
+{
+ struct stm32_hash_dev *hdev = param;
+
+ complete(&hdev->dma_completion);
+
+ hdev->flags |= HASH_FLAGS_DMA_READY;
+}
+
+static int stm32_hash_hmac_dma_send(struct stm32_hash_dev *hdev)
+{
+ struct stm32_hash_request_ctx *rctx = ahash_request_ctx(hdev->req);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(hdev->req);
+ struct stm32_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+ int err;
+
+ if (ctx->keylen < HASH_DMA_THRESHOLD || (hdev->dma_mode == 1)) {
+ err = stm32_hash_write_key(hdev);
+ if (stm32_hash_wait_busy(hdev))
+ return -ETIMEDOUT;
+ } else {
+ if (!(hdev->flags & HASH_FLAGS_HMAC_KEY))
+ sg_init_one(&rctx->sg_key, ctx->key,
+ ALIGN(ctx->keylen, sizeof(u32)));
+
+ rctx->dma_ct = dma_map_sg(hdev->dev, &rctx->sg_key, 1,
+ DMA_TO_DEVICE);
+ if (rctx->dma_ct == 0) {
+ dev_err(hdev->dev, "dma_map_sg error\n");
+ return -ENOMEM;
+ }
+
+ err = stm32_hash_xmit_dma(hdev, &rctx->sg_key, ctx->keylen, 0);
+
+ dma_unmap_sg(hdev->dev, &rctx->sg_key, 1, DMA_TO_DEVICE);
+ }
+
+ return err;
+}
+
+static int stm32_hash_dma_init(struct stm32_hash_dev *hdev)
+{
+ struct dma_slave_config dma_conf;
+ int err;
+
+ memset(&dma_conf, 0, sizeof(dma_conf));
+
+ dma_conf.direction = DMA_MEM_TO_DEV;
+ dma_conf.dst_addr = hdev->phys_base + HASH_DIN;
+ dma_conf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dma_conf.src_maxburst = hdev->dma_maxburst;
+ dma_conf.dst_maxburst = hdev->dma_maxburst;
+ dma_conf.device_fc = false;
+
+ hdev->dma_lch = dma_request_slave_channel(hdev->dev, "in");
+ if (!hdev->dma_lch) {
+ dev_err(hdev->dev, "Couldn't acquire a slave DMA channel.\n");
+ return -EBUSY;
+ }
+
+ err = dmaengine_slave_config(hdev->dma_lch, &dma_conf);
+ if (err) {
+ dma_release_channel(hdev->dma_lch);
+ hdev->dma_lch = NULL;
+ dev_err(hdev->dev, "Couldn't configure DMA slave.\n");
+ return err;
+ }
+
+ init_completion(&hdev->dma_completion);
+
+ return 0;
+}
+
+static int stm32_hash_dma_send(struct stm32_hash_dev *hdev)
+{
+ struct stm32_hash_request_ctx *rctx = ahash_request_ctx(hdev->req);
+ struct scatterlist sg[1], *tsg;
+ int err = 0, len = 0, reg, ncp;
+ unsigned int i;
+ const u32 *buffer = (const u32 *)rctx->buffer;
+
+ rctx->sg = hdev->req->src;
+ rctx->total = hdev->req->nbytes;
+
+ rctx->nents = sg_nents(rctx->sg);
+
+ if (rctx->nents < 0)
+ return -EINVAL;
+
+ stm32_hash_write_ctrl(hdev);
+
+ if (hdev->flags & HASH_FLAGS_HMAC) {
+ err = stm32_hash_hmac_dma_send(hdev);
+ if (err != -EINPROGRESS)
+ return err;
+ }
+
+ for_each_sg(rctx->sg, tsg, rctx->nents, i) {
+ len = sg->length;
+
+ sg[0] = *tsg;
+ if (sg_is_last(sg)) {
+ if (hdev->dma_mode == 1) {
+ len = (ALIGN(sg->length, 16) - 16);
+
+ ncp = sg_pcopy_to_buffer(
+ rctx->sg, rctx->nents,
+ rctx->buffer, sg->length - len,
+ rctx->total - sg->length + len);
+
+ sg->length = len;
+ } else {
+ if (!(IS_ALIGNED(sg->length, sizeof(u32)))) {
+ len = sg->length;
+ sg->length = ALIGN(sg->length,
+ sizeof(u32));
+ }
+ }
+ }
+
+ rctx->dma_ct = dma_map_sg(hdev->dev, sg, 1,
+ DMA_TO_DEVICE);
+ if (rctx->dma_ct == 0) {
+ dev_err(hdev->dev, "dma_map_sg error\n");
+ return -ENOMEM;
+ }
+
+ err = stm32_hash_xmit_dma(hdev, sg, len,
+ !sg_is_last(sg));
+
+ dma_unmap_sg(hdev->dev, sg, 1, DMA_TO_DEVICE);
+
+ if (err == -ENOMEM)
+ return err;
+ }
+
+ if (hdev->dma_mode == 1) {
+ if (stm32_hash_wait_busy(hdev))
+ return -ETIMEDOUT;
+ reg = stm32_hash_read(hdev, HASH_CR);
+ reg &= ~HASH_CR_DMAE;
+ reg |= HASH_CR_DMAA;
+ stm32_hash_write(hdev, HASH_CR, reg);
+
+ for (i = 0; i < DIV_ROUND_UP(ncp, sizeof(u32)); i++)
+ stm32_hash_write(hdev, HASH_DIN, buffer[i]);
+
+ stm32_hash_set_nblw(hdev, ncp);
+ reg = stm32_hash_read(hdev, HASH_STR);
+ reg |= HASH_STR_DCAL;
+ stm32_hash_write(hdev, HASH_STR, reg);
+ err = -EINPROGRESS;
+ }
+
+ if (hdev->flags & HASH_FLAGS_HMAC) {
+ if (stm32_hash_wait_busy(hdev))
+ return -ETIMEDOUT;
+ err = stm32_hash_hmac_dma_send(hdev);
+ }
+
+ return err;
+}
+
+static struct stm32_hash_dev *stm32_hash_find_dev(struct stm32_hash_ctx *ctx)
+{
+ struct stm32_hash_dev *hdev = NULL, *tmp;
+
+ spin_lock_bh(&stm32_hash.lock);
+ if (!ctx->hdev) {
+ list_for_each_entry(tmp, &stm32_hash.dev_list, list) {
+ hdev = tmp;
+ break;
+ }
+ ctx->hdev = hdev;
+ } else {
+ hdev = ctx->hdev;
+ }
+
+ spin_unlock_bh(&stm32_hash.lock);
+
+ return hdev;
+}
+
+static bool stm32_hash_dma_aligned_data(struct ahash_request *req)
+{
+ struct scatterlist *sg;
+ struct stm32_hash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
+ struct stm32_hash_dev *hdev = stm32_hash_find_dev(ctx);
+ int i;
+
+ if (req->nbytes <= HASH_DMA_THRESHOLD)
+ return false;
+
+ if (sg_nents(req->src) > 1) {
+ if (hdev->dma_mode == 1)
+ return false;
+ for_each_sg(req->src, sg, sg_nents(req->src), i) {
+ if ((!IS_ALIGNED(sg->length, sizeof(u32))) &&
+ (!sg_is_last(sg)))
+ return false;
+ }
+ }
+
+ if (req->src->offset % 4)
+ return false;
+
+ return true;
+}
+
+static int stm32_hash_init(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct stm32_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+ struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
+ struct stm32_hash_dev *hdev = stm32_hash_find_dev(ctx);
+
+ rctx->hdev = hdev;
+
+ rctx->flags = HASH_FLAGS_CPU;
+
+ rctx->digcnt = crypto_ahash_digestsize(tfm);
+ switch (rctx->digcnt) {
+ case MD5_DIGEST_SIZE:
+ rctx->flags |= HASH_FLAGS_MD5;
+ break;
+ case SHA1_DIGEST_SIZE:
+ rctx->flags |= HASH_FLAGS_SHA1;
+ break;
+ case SHA224_DIGEST_SIZE:
+ rctx->flags |= HASH_FLAGS_SHA224;
+ break;
+ case SHA256_DIGEST_SIZE:
+ rctx->flags |= HASH_FLAGS_SHA256;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ rctx->bufcnt = 0;
+ rctx->buflen = HASH_BUFLEN;
+ rctx->total = 0;
+ rctx->offset = 0;
+ rctx->data_type = HASH_DATA_8_BITS;
+
+ memset(rctx->buffer, 0, HASH_BUFLEN);
+
+ if (ctx->flags & HASH_FLAGS_HMAC)
+ rctx->flags |= HASH_FLAGS_HMAC;
+
+ dev_dbg(hdev->dev, "%s Flags %lx\n", __func__, rctx->flags);
+
+ return 0;
+}
+
+static int stm32_hash_update_req(struct stm32_hash_dev *hdev)
+{
+ return stm32_hash_update_cpu(hdev);
+}
+
+static int stm32_hash_final_req(struct stm32_hash_dev *hdev)
+{
+ struct ahash_request *req = hdev->req;
+ struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
+ int err;
+
+ if (!(rctx->flags & HASH_FLAGS_CPU))
+ err = stm32_hash_dma_send(hdev);
+ else
+ err = stm32_hash_xmit_cpu(hdev, rctx->buffer, rctx->bufcnt, 1);
+
+ rctx->bufcnt = 0;
+
+ return err;
+}
+
+static void stm32_hash_copy_hash(struct ahash_request *req)
+{
+ struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
+ u32 *hash = (u32 *)rctx->digest;
+ unsigned int i, hashsize;
+
+ switch (rctx->flags & HASH_FLAGS_ALGO_MASK) {
+ case HASH_FLAGS_MD5:
+ hashsize = MD5_DIGEST_SIZE;
+ break;
+ case HASH_FLAGS_SHA1:
+ hashsize = SHA1_DIGEST_SIZE;
+ break;
+ case HASH_FLAGS_SHA224:
+ hashsize = SHA224_DIGEST_SIZE;
+ break;
+ case HASH_FLAGS_SHA256:
+ hashsize = SHA256_DIGEST_SIZE;
+ break;
+ default:
+ return;
+ }
+
+ for (i = 0; i < hashsize / sizeof(u32); i++)
+ hash[i] = be32_to_cpu(stm32_hash_read(rctx->hdev,
+ HASH_HREG(i)));
+}
+
+static int stm32_hash_finish(struct ahash_request *req)
+{
+ struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
+
+ if (!req->result)
+ return -EINVAL;
+
+ memcpy(req->result, rctx->digest, rctx->digcnt);
+
+ return 0;
+}
+
+static void stm32_hash_finish_req(struct ahash_request *req, int err)
+{
+ struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
+ struct stm32_hash_dev *hdev = rctx->hdev;
+
+ if (!err && (HASH_FLAGS_FINAL & hdev->flags)) {
+ stm32_hash_copy_hash(req);
+ err = stm32_hash_finish(req);
+ hdev->flags &= ~(HASH_FLAGS_FINAL | HASH_FLAGS_CPU |
+ HASH_FLAGS_INIT | HASH_FLAGS_DMA_READY |
+ HASH_FLAGS_OUTPUT_READY | HASH_FLAGS_HMAC |
+ HASH_FLAGS_HMAC_INIT | HASH_FLAGS_HMAC_FINAL |
+ HASH_FLAGS_HMAC_KEY);
+ } else {
+ rctx->flags |= HASH_FLAGS_ERRORS;
+ }
+
+ crypto_finalize_hash_request(hdev->engine, req, err);
+}
+
+static int stm32_hash_hw_init(struct stm32_hash_dev *hdev,
+ struct stm32_hash_request_ctx *rctx)
+{
+ if (!(HASH_FLAGS_INIT & hdev->flags)) {
+ stm32_hash_write(hdev, HASH_CR, HASH_CR_INIT);
+ stm32_hash_write(hdev, HASH_STR, 0);
+ stm32_hash_write(hdev, HASH_DIN, 0);
+ stm32_hash_write(hdev, HASH_IMR, 0);
+ hdev->err = 0;
+ }
+
+ return 0;
+}
+
+static int stm32_hash_handle_queue(struct stm32_hash_dev *hdev,
+ struct ahash_request *req)
+{
+ return crypto_transfer_hash_request_to_engine(hdev->engine, req);
+}
+
+static int stm32_hash_prepare_req(struct crypto_engine *engine,
+ struct ahash_request *req)
+{
+ struct stm32_hash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
+ struct stm32_hash_dev *hdev = stm32_hash_find_dev(ctx);
+ struct stm32_hash_request_ctx *rctx;
+
+ if (!hdev)
+ return -ENODEV;
+
+ hdev->req = req;
+
+ rctx = ahash_request_ctx(req);
+
+ dev_dbg(hdev->dev, "processing new req, op: %lu, nbytes %d\n",
+ rctx->op, req->nbytes);
+
+ return stm32_hash_hw_init(hdev, rctx);
+}
+
+static int stm32_hash_one_request(struct crypto_engine *engine,
+ struct ahash_request *req)
+{
+ struct stm32_hash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
+ struct stm32_hash_dev *hdev = stm32_hash_find_dev(ctx);
+ struct stm32_hash_request_ctx *rctx;
+ int err = 0;
+
+ if (!hdev)
+ return -ENODEV;
+
+ hdev->req = req;
+
+ rctx = ahash_request_ctx(req);
+
+ if (rctx->op == HASH_OP_UPDATE)
+ err = stm32_hash_update_req(hdev);
+ else if (rctx->op == HASH_OP_FINAL)
+ err = stm32_hash_final_req(hdev);
+
+ if (err != -EINPROGRESS)
+ /* done task will not finish it, so do it here */
+ stm32_hash_finish_req(req, err);
+
+ return 0;
+}
+
+static int stm32_hash_enqueue(struct ahash_request *req, unsigned int op)
+{
+ struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
+ struct stm32_hash_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
+ struct stm32_hash_dev *hdev = ctx->hdev;
+
+ rctx->op = op;
+
+ return stm32_hash_handle_queue(hdev, req);
+}
+
+static int stm32_hash_update(struct ahash_request *req)
+{
+ struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
+ int ret;
+
+ if (!req->nbytes || !(rctx->flags & HASH_FLAGS_CPU))
+ return 0;
+
+ rctx->total = req->nbytes;
+ rctx->sg = req->src;
+ rctx->offset = 0;
+
+ if ((rctx->bufcnt + rctx->total < rctx->buflen)) {
+ stm32_hash_append_sg(rctx);
+ return 0;
+ }
+
+ ret = stm32_hash_enqueue(req, HASH_OP_UPDATE);
+
+ if (rctx->flags & HASH_FLAGS_FINUP)
+ return ret;
+
+ return 0;
+}
+
+static int stm32_hash_final(struct ahash_request *req)
+{
+ struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
+
+ rctx->flags |= HASH_FLAGS_FINUP;
+
+ return stm32_hash_enqueue(req, HASH_OP_FINAL);
+}
+
+static int stm32_hash_finup(struct ahash_request *req)
+{
+ struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
+ struct stm32_hash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
+ struct stm32_hash_dev *hdev = stm32_hash_find_dev(ctx);
+ int err1, err2;
+
+ rctx->flags |= HASH_FLAGS_FINUP;
+
+ if (hdev->dma_lch && stm32_hash_dma_aligned_data(req))
+ rctx->flags &= ~HASH_FLAGS_CPU;
+
+ err1 = stm32_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
+ */
+ err2 = stm32_hash_final(req);
+
+ return err1 ?: err2;
+}
+
+static int stm32_hash_digest(struct ahash_request *req)
+{
+ return stm32_hash_init(req) ?: stm32_hash_finup(req);
+}
+
+static int stm32_hash_export(struct ahash_request *req, void *out)
+{
+ struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
+ struct stm32_hash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
+ struct stm32_hash_dev *hdev = stm32_hash_find_dev(ctx);
+ u32 *preg;
+ unsigned int i;
+
+ while (!(stm32_hash_read(hdev, HASH_SR) & HASH_SR_DATA_INPUT_READY))
+ cpu_relax();
+
+ rctx->hw_context = kmalloc(sizeof(u32) * (3 + HASH_CSR_REGISTER_NUMBER),
+ GFP_KERNEL);
+
+ preg = rctx->hw_context;
+
+ *preg++ = stm32_hash_read(hdev, HASH_IMR);
+ *preg++ = stm32_hash_read(hdev, HASH_STR);
+ *preg++ = stm32_hash_read(hdev, HASH_CR);
+ for (i = 0; i < HASH_CSR_REGISTER_NUMBER; i++)
+ *preg++ = stm32_hash_read(hdev, HASH_CSR(i));
+
+ memcpy(out, rctx, sizeof(*rctx));
+
+ return 0;
+}
+
+static int stm32_hash_import(struct ahash_request *req, const void *in)
+{
+ struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
+ struct stm32_hash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
+ struct stm32_hash_dev *hdev = stm32_hash_find_dev(ctx);
+ const u32 *preg = in;
+ u32 reg;
+ unsigned int i;
+
+ memcpy(rctx, in, sizeof(*rctx));
+
+ preg = rctx->hw_context;
+
+ stm32_hash_write(hdev, HASH_IMR, *preg++);
+ stm32_hash_write(hdev, HASH_STR, *preg++);
+ stm32_hash_write(hdev, HASH_CR, *preg);
+ reg = *preg++ | HASH_CR_INIT;
+ stm32_hash_write(hdev, HASH_CR, reg);
+
+ for (i = 0; i < HASH_CSR_REGISTER_NUMBER; i++)
+ stm32_hash_write(hdev, HASH_CSR(i), *preg++);
+
+ kfree(rctx->hw_context);
+
+ return 0;
+}
+
+static int stm32_hash_setkey(struct crypto_ahash *tfm,
+ const u8 *key, unsigned int keylen)
+{
+ struct stm32_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+
+ if (keylen <= HASH_MAX_KEY_SIZE) {
+ memcpy(ctx->key, key, keylen);
+ ctx->keylen = keylen;
+ } else {
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static int stm32_hash_cra_init_algs(struct crypto_tfm *tfm,
+ const char *algs_hmac_name)
+{
+ struct stm32_hash_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
+ sizeof(struct stm32_hash_request_ctx));
+
+ ctx->keylen = 0;
+
+ if (algs_hmac_name)
+ ctx->flags |= HASH_FLAGS_HMAC;
+
+ return 0;
+}
+
+static int stm32_hash_cra_init(struct crypto_tfm *tfm)
+{
+ return stm32_hash_cra_init_algs(tfm, NULL);
+}
+
+static int stm32_hash_cra_md5_init(struct crypto_tfm *tfm)
+{
+ return stm32_hash_cra_init_algs(tfm, "md5");
+}
+
+static int stm32_hash_cra_sha1_init(struct crypto_tfm *tfm)
+{
+ return stm32_hash_cra_init_algs(tfm, "sha1");
+}
+
+static int stm32_hash_cra_sha224_init(struct crypto_tfm *tfm)
+{
+ return stm32_hash_cra_init_algs(tfm, "sha224");
+}
+
+static int stm32_hash_cra_sha256_init(struct crypto_tfm *tfm)
+{
+ return stm32_hash_cra_init_algs(tfm, "sha256");
+}
+
+static irqreturn_t stm32_hash_irq_thread(int irq, void *dev_id)
+{
+ struct stm32_hash_dev *hdev = dev_id;
+ int err;
+
+ if (HASH_FLAGS_CPU & hdev->flags) {
+ if (HASH_FLAGS_OUTPUT_READY & hdev->flags) {
+ hdev->flags &= ~HASH_FLAGS_OUTPUT_READY;
+ goto finish;
+ }
+ } else if (HASH_FLAGS_DMA_READY & hdev->flags) {
+ if (HASH_FLAGS_DMA_ACTIVE & hdev->flags) {
+ hdev->flags &= ~HASH_FLAGS_DMA_ACTIVE;
+ goto finish;
+ }
+ }
+
+ return IRQ_HANDLED;
+
+finish:
+ /*Finish current request */
+ stm32_hash_finish_req(hdev->req, err);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t stm32_hash_irq_handler(int irq, void *dev_id)
+{
+ struct stm32_hash_dev *hdev = dev_id;
+ u32 reg;
+
+ reg = stm32_hash_read(hdev, HASH_SR);
+ if (reg & HASH_SR_OUTPUT_READY) {
+ reg &= ~HASH_SR_OUTPUT_READY;
+ stm32_hash_write(hdev, HASH_SR, reg);
+ hdev->flags |= HASH_FLAGS_OUTPUT_READY;
+ return IRQ_WAKE_THREAD;
+ }
+
+ return IRQ_NONE;
+}
+
+static struct ahash_alg algs_md5_sha1[] = {
+ {
+ .init = stm32_hash_init,
+ .update = stm32_hash_update,
+ .final = stm32_hash_final,
+ .finup = stm32_hash_finup,
+ .digest = stm32_hash_digest,
+ .export = stm32_hash_export,
+ .import = stm32_hash_import,
+ .halg = {
+ .digestsize = MD5_DIGEST_SIZE,
+ .statesize = sizeof(struct stm32_hash_request_ctx),
+ .base = {
+ .cra_name = "md5",
+ .cra_driver_name = "stm32-md5",
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_KERN_DRIVER_ONLY,
+ .cra_blocksize = MD5_HMAC_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct stm32_hash_ctx),
+ .cra_alignmask = 3,
+ .cra_init = stm32_hash_cra_init,
+ .cra_module = THIS_MODULE,
+ }
+ }
+ },
+ {
+ .init = stm32_hash_init,
+ .update = stm32_hash_update,
+ .final = stm32_hash_final,
+ .finup = stm32_hash_finup,
+ .digest = stm32_hash_digest,
+ .export = stm32_hash_export,
+ .import = stm32_hash_import,
+ .setkey = stm32_hash_setkey,
+ .halg = {
+ .digestsize = MD5_DIGEST_SIZE,
+ .statesize = sizeof(struct stm32_hash_request_ctx),
+ .base = {
+ .cra_name = "hmac(md5)",
+ .cra_driver_name = "stm32-hmac-md5",
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_KERN_DRIVER_ONLY,
+ .cra_blocksize = MD5_HMAC_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct stm32_hash_ctx),
+ .cra_alignmask = 3,
+ .cra_init = stm32_hash_cra_md5_init,
+ .cra_module = THIS_MODULE,
+ }
+ }
+ },
+ {
+ .init = stm32_hash_init,
+ .update = stm32_hash_update,
+ .final = stm32_hash_final,
+ .finup = stm32_hash_finup,
+ .digest = stm32_hash_digest,
+ .export = stm32_hash_export,
+ .import = stm32_hash_import,
+ .halg = {
+ .digestsize = SHA1_DIGEST_SIZE,
+ .statesize = sizeof(struct stm32_hash_request_ctx),
+ .base = {
+ .cra_name = "sha1",
+ .cra_driver_name = "stm32-sha1",
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_KERN_DRIVER_ONLY,
+ .cra_blocksize = SHA1_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct stm32_hash_ctx),
+ .cra_alignmask = 3,
+ .cra_init = stm32_hash_cra_init,
+ .cra_module = THIS_MODULE,
+ }
+ }
+ },
+ {
+ .init = stm32_hash_init,
+ .update = stm32_hash_update,
+ .final = stm32_hash_final,
+ .finup = stm32_hash_finup,
+ .digest = stm32_hash_digest,
+ .export = stm32_hash_export,
+ .import = stm32_hash_import,
+ .setkey = stm32_hash_setkey,
+ .halg = {
+ .digestsize = SHA1_DIGEST_SIZE,
+ .statesize = sizeof(struct stm32_hash_request_ctx),
+ .base = {
+ .cra_name = "hmac(sha1)",
+ .cra_driver_name = "stm32-hmac-sha1",
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_KERN_DRIVER_ONLY,
+ .cra_blocksize = SHA1_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct stm32_hash_ctx),
+ .cra_alignmask = 3,
+ .cra_init = stm32_hash_cra_sha1_init,
+ .cra_module = THIS_MODULE,
+ }
+ }
+ },
+};
+
+static struct ahash_alg algs_sha224_sha256[] = {
+ {
+ .init = stm32_hash_init,
+ .update = stm32_hash_update,
+ .final = stm32_hash_final,
+ .finup = stm32_hash_finup,
+ .digest = stm32_hash_digest,
+ .export = stm32_hash_export,
+ .import = stm32_hash_import,
+ .halg = {
+ .digestsize = SHA224_DIGEST_SIZE,
+ .statesize = sizeof(struct stm32_hash_request_ctx),
+ .base = {
+ .cra_name = "sha224",
+ .cra_driver_name = "stm32-sha224",
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_KERN_DRIVER_ONLY,
+ .cra_blocksize = SHA224_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct stm32_hash_ctx),
+ .cra_alignmask = 3,
+ .cra_init = stm32_hash_cra_init,
+ .cra_module = THIS_MODULE,
+ }
+ }
+ },
+ {
+ .init = stm32_hash_init,
+ .update = stm32_hash_update,
+ .final = stm32_hash_final,
+ .finup = stm32_hash_finup,
+ .digest = stm32_hash_digest,
+ .setkey = stm32_hash_setkey,
+ .export = stm32_hash_export,
+ .import = stm32_hash_import,
+ .halg = {
+ .digestsize = SHA224_DIGEST_SIZE,
+ .statesize = sizeof(struct stm32_hash_request_ctx),
+ .base = {
+ .cra_name = "hmac(sha224)",
+ .cra_driver_name = "stm32-hmac-sha224",
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_KERN_DRIVER_ONLY,
+ .cra_blocksize = SHA224_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct stm32_hash_ctx),
+ .cra_alignmask = 3,
+ .cra_init = stm32_hash_cra_sha224_init,
+ .cra_module = THIS_MODULE,
+ }
+ }
+ },
+ {
+ .init = stm32_hash_init,
+ .update = stm32_hash_update,
+ .final = stm32_hash_final,
+ .finup = stm32_hash_finup,
+ .digest = stm32_hash_digest,
+ .export = stm32_hash_export,
+ .import = stm32_hash_import,
+ .halg = {
+ .digestsize = SHA256_DIGEST_SIZE,
+ .statesize = sizeof(struct stm32_hash_request_ctx),
+ .base = {
+ .cra_name = "sha256",
+ .cra_driver_name = "stm32-sha256",
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_KERN_DRIVER_ONLY,
+ .cra_blocksize = SHA256_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct stm32_hash_ctx),
+ .cra_alignmask = 3,
+ .cra_init = stm32_hash_cra_init,
+ .cra_module = THIS_MODULE,
+ }
+ }
+ },
+ {
+ .init = stm32_hash_init,
+ .update = stm32_hash_update,
+ .final = stm32_hash_final,
+ .finup = stm32_hash_finup,
+ .digest = stm32_hash_digest,
+ .export = stm32_hash_export,
+ .import = stm32_hash_import,
+ .setkey = stm32_hash_setkey,
+ .halg = {
+ .digestsize = SHA256_DIGEST_SIZE,
+ .statesize = sizeof(struct stm32_hash_request_ctx),
+ .base = {
+ .cra_name = "hmac(sha256)",
+ .cra_driver_name = "stm32-hmac-sha256",
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_KERN_DRIVER_ONLY,
+ .cra_blocksize = SHA256_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct stm32_hash_ctx),
+ .cra_alignmask = 3,
+ .cra_init = stm32_hash_cra_sha256_init,
+ .cra_module = THIS_MODULE,
+ }
+ }
+ },
+};
+
+static int stm32_hash_register_algs(struct stm32_hash_dev *hdev)
+{
+ unsigned int i, j;
+ int err;
+
+ for (i = 0; i < hdev->pdata->algs_info_size; i++) {
+ for (j = 0; j < hdev->pdata->algs_info[i].size; j++) {
+ err = crypto_register_ahash(
+ &hdev->pdata->algs_info[i].algs_list[j]);
+ if (err)
+ goto err_algs;
+ }
+ }
+
+ return 0;
+err_algs:
+ dev_err(hdev->dev, "Algo %d : %d failed\n", i, j);
+ for (; i--; ) {
+ for (; j--;)
+ crypto_unregister_ahash(
+ &hdev->pdata->algs_info[i].algs_list[j]);
+ }
+
+ return err;
+}
+
+static int stm32_hash_unregister_algs(struct stm32_hash_dev *hdev)
+{
+ unsigned int i, j;
+
+ for (i = 0; i < hdev->pdata->algs_info_size; i++) {
+ for (j = 0; j < hdev->pdata->algs_info[i].size; j++)
+ crypto_unregister_ahash(
+ &hdev->pdata->algs_info[i].algs_list[j]);
+ }
+
+ return 0;
+}
+
+static struct stm32_hash_algs_info stm32_hash_algs_info_stm32f4[] = {
+ {
+ .algs_list = algs_md5_sha1,
+ .size = ARRAY_SIZE(algs_md5_sha1),
+ },
+};
+
+static const struct stm32_hash_pdata stm32_hash_pdata_stm32f4 = {
+ .algs_info = stm32_hash_algs_info_stm32f4,
+ .algs_info_size = ARRAY_SIZE(stm32_hash_algs_info_stm32f4),
+};
+
+static struct stm32_hash_algs_info stm32_hash_algs_info_stm32f7[] = {
+ {
+ .algs_list = algs_md5_sha1,
+ .size = ARRAY_SIZE(algs_md5_sha1),
+ },
+ {
+ .algs_list = algs_sha224_sha256,
+ .size = ARRAY_SIZE(algs_sha224_sha256),
+ },
+};
+
+static const struct stm32_hash_pdata stm32_hash_pdata_stm32f7 = {
+ .algs_info = stm32_hash_algs_info_stm32f7,
+ .algs_info_size = ARRAY_SIZE(stm32_hash_algs_info_stm32f7),
+};
+
+static const struct of_device_id stm32_hash_of_match[] = {
+ {
+ .compatible = "st,stm32f456-hash",
+ .data = &stm32_hash_pdata_stm32f4,
+ },
+ {
+ .compatible = "st,stm32f756-hash",
+ .data = &stm32_hash_pdata_stm32f7,
+ },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, stm32_hash_of_match);
+
+static int stm32_hash_get_of_match(struct stm32_hash_dev *hdev,
+ struct device *dev)
+{
+ const struct of_device_id *match;
+ int err;
+
+ match = of_match_device(stm32_hash_of_match, dev);
+ if (!match) {
+ dev_err(dev, "no compatible OF match\n");
+ return -EINVAL;
+ }
+
+ err = of_property_read_u32(dev->of_node, "dma-maxburst",
+ &hdev->dma_maxburst);
+
+ hdev->pdata = match->data;
+
+ return err;
+}
+
+static int stm32_hash_probe(struct platform_device *pdev)
+{
+ struct stm32_hash_dev *hdev;
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ int ret, irq;
+
+ hdev = devm_kzalloc(dev, sizeof(*hdev), GFP_KERNEL);
+ if (!hdev)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hdev->io_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(hdev->io_base))
+ return PTR_ERR(hdev->io_base);
+
+ hdev->phys_base = res->start;
+
+ ret = stm32_hash_get_of_match(hdev, dev);
+ if (ret)
+ return ret;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(dev, "Cannot get IRQ resource\n");
+ return irq;
+ }
+
+ ret = devm_request_threaded_irq(dev, irq, stm32_hash_irq_handler,
+ stm32_hash_irq_thread, IRQF_ONESHOT,
+ dev_name(dev), hdev);
+ if (ret) {
+ dev_err(dev, "Cannot grab IRQ\n");
+ return ret;
+ }
+
+ hdev->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(hdev->clk)) {
+ dev_err(dev, "failed to get clock for hash (%lu)\n",
+ PTR_ERR(hdev->clk));
+ return PTR_ERR(hdev->clk);
+ }
+
+ ret = clk_prepare_enable(hdev->clk);
+ if (ret) {
+ dev_err(dev, "failed to enable hash clock (%d)\n", ret);
+ return ret;
+ }
+
+ hdev->rst = devm_reset_control_get(&pdev->dev, NULL);
+ if (!IS_ERR(hdev->rst)) {
+ reset_control_assert(hdev->rst);
+ udelay(2);
+ reset_control_deassert(hdev->rst);
+ }
+
+ hdev->dev = dev;
+
+ platform_set_drvdata(pdev, hdev);
+
+ ret = stm32_hash_dma_init(hdev);
+ if (ret)
+ dev_dbg(dev, "DMA mode not available\n");
+
+ spin_lock(&stm32_hash.lock);
+ list_add_tail(&hdev->list, &stm32_hash.dev_list);
+ spin_unlock(&stm32_hash.lock);
+
+ /* Initialize crypto engine */
+ hdev->engine = crypto_engine_alloc_init(dev, 1);
+ if (!hdev->engine) {
+ ret = -ENOMEM;
+ goto err_engine;
+ }
+
+ hdev->engine->prepare_hash_request = stm32_hash_prepare_req;
+ hdev->engine->hash_one_request = stm32_hash_one_request;
+
+ ret = crypto_engine_start(hdev->engine);
+ if (ret)
+ goto err_engine_start;
+
+ hdev->dma_mode = stm32_hash_read(hdev, HASH_HWCFGR);
+
+ /* Register algos */
+ ret = stm32_hash_register_algs(hdev);
+ if (ret)
+ goto err_algs;
+
+ dev_info(dev, "Init HASH done HW ver %x DMA mode %u\n",
+ stm32_hash_read(hdev, HASH_VER), hdev->dma_mode);
+
+ return 0;
+
+err_algs:
+err_engine_start:
+ crypto_engine_exit(hdev->engine);
+err_engine:
+ spin_lock(&stm32_hash.lock);
+ list_del(&hdev->list);
+ spin_unlock(&stm32_hash.lock);
+
+ if (hdev->dma_lch)
+ dma_release_channel(hdev->dma_lch);
+
+ clk_disable_unprepare(hdev->clk);
+
+ return ret;
+}
+
+static int stm32_hash_remove(struct platform_device *pdev)
+{
+ static struct stm32_hash_dev *hdev;
+
+ hdev = platform_get_drvdata(pdev);
+ if (!hdev)
+ return -ENODEV;
+
+ stm32_hash_unregister_algs(hdev);
+
+ crypto_engine_exit(hdev->engine);
+
+ spin_lock(&stm32_hash.lock);
+ list_del(&hdev->list);
+ spin_unlock(&stm32_hash.lock);
+
+ if (hdev->dma_lch)
+ dma_release_channel(hdev->dma_lch);
+
+ clk_disable_unprepare(hdev->clk);
+
+ return 0;
+}
+
+static struct platform_driver stm32_hash_driver = {
+ .probe = stm32_hash_probe,
+ .remove = stm32_hash_remove,
+ .driver = {
+ .name = "stm32-hash",
+ .of_match_table = stm32_hash_of_match,
+ }
+};
+
+module_platform_driver(stm32_hash_driver);
+
+MODULE_DESCRIPTION("STM32 SHA1/224/256 & MD5 (HMAC) hw accelerator driver");
+MODULE_AUTHOR("Lionel Debieve <lionel.debieve@xxxxxx>");
+MODULE_LICENSE("GPL v2");
+
--
2.7.4