v4.19.13 snapshot.
diff --git a/drivers/crypto/stm32/Kconfig b/drivers/crypto/stm32/Kconfig
new file mode 100644
index 0000000..63aa78c
--- /dev/null
+++ b/drivers/crypto/stm32/Kconfig
@@ -0,0 +1,29 @@
+config CRYPTO_DEV_STM32_CRC
+ tristate "Support for STM32 crc accelerators"
+ depends on ARCH_STM32
+ select CRYPTO_HASH
+ help
+ This enables support for the CRC32 hw accelerator which can be found
+ on STMicroelectronics STM32 SOC.
+
+config CRYPTO_DEV_STM32_HASH
+ 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.
+
+config CRYPTO_DEV_STM32_CRYP
+ tristate "Support for STM32 cryp accelerators"
+ depends on ARCH_STM32
+ select CRYPTO_HASH
+ select CRYPTO_ENGINE
+ help
+ This enables support for the CRYP (AES/DES/TDES) hw accelerator which
+ can be found on STMicroelectronics STM32 SOC.
diff --git a/drivers/crypto/stm32/Makefile b/drivers/crypto/stm32/Makefile
new file mode 100644
index 0000000..53d1bb9
--- /dev/null
+++ b/drivers/crypto/stm32/Makefile
@@ -0,0 +1,3 @@
+obj-$(CONFIG_CRYPTO_DEV_STM32_CRC) += stm32_crc32.o
+obj-$(CONFIG_CRYPTO_DEV_STM32_HASH) += stm32-hash.o
+obj-$(CONFIG_CRYPTO_DEV_STM32_CRYP) += stm32-cryp.o
diff --git a/drivers/crypto/stm32/stm32-cryp.c b/drivers/crypto/stm32/stm32-cryp.c
new file mode 100644
index 0000000..23b0b7b
--- /dev/null
+++ b/drivers/crypto/stm32/stm32-cryp.c
@@ -0,0 +1,2124 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2017
+ * Author: Fabien Dessenne <fabien.dessenne@st.com>
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+#include <crypto/aes.h>
+#include <crypto/des.h>
+#include <crypto/engine.h>
+#include <crypto/scatterwalk.h>
+#include <crypto/internal/aead.h>
+
+#define DRIVER_NAME "stm32-cryp"
+
+/* Bit [0] encrypt / decrypt */
+#define FLG_ENCRYPT BIT(0)
+/* Bit [8..1] algo & operation mode */
+#define FLG_AES BIT(1)
+#define FLG_DES BIT(2)
+#define FLG_TDES BIT(3)
+#define FLG_ECB BIT(4)
+#define FLG_CBC BIT(5)
+#define FLG_CTR BIT(6)
+#define FLG_GCM BIT(7)
+#define FLG_CCM BIT(8)
+/* Mode mask = bits [15..0] */
+#define FLG_MODE_MASK GENMASK(15, 0)
+/* Bit [31..16] status */
+#define FLG_CCM_PADDED_WA BIT(16)
+
+/* Registers */
+#define CRYP_CR 0x00000000
+#define CRYP_SR 0x00000004
+#define CRYP_DIN 0x00000008
+#define CRYP_DOUT 0x0000000C
+#define CRYP_DMACR 0x00000010
+#define CRYP_IMSCR 0x00000014
+#define CRYP_RISR 0x00000018
+#define CRYP_MISR 0x0000001C
+#define CRYP_K0LR 0x00000020
+#define CRYP_K0RR 0x00000024
+#define CRYP_K1LR 0x00000028
+#define CRYP_K1RR 0x0000002C
+#define CRYP_K2LR 0x00000030
+#define CRYP_K2RR 0x00000034
+#define CRYP_K3LR 0x00000038
+#define CRYP_K3RR 0x0000003C
+#define CRYP_IV0LR 0x00000040
+#define CRYP_IV0RR 0x00000044
+#define CRYP_IV1LR 0x00000048
+#define CRYP_IV1RR 0x0000004C
+#define CRYP_CSGCMCCM0R 0x00000050
+#define CRYP_CSGCM0R 0x00000070
+
+/* Registers values */
+#define CR_DEC_NOT_ENC 0x00000004
+#define CR_TDES_ECB 0x00000000
+#define CR_TDES_CBC 0x00000008
+#define CR_DES_ECB 0x00000010
+#define CR_DES_CBC 0x00000018
+#define CR_AES_ECB 0x00000020
+#define CR_AES_CBC 0x00000028
+#define CR_AES_CTR 0x00000030
+#define CR_AES_KP 0x00000038
+#define CR_AES_GCM 0x00080000
+#define CR_AES_CCM 0x00080008
+#define CR_AES_UNKNOWN 0xFFFFFFFF
+#define CR_ALGO_MASK 0x00080038
+#define CR_DATA32 0x00000000
+#define CR_DATA16 0x00000040
+#define CR_DATA8 0x00000080
+#define CR_DATA1 0x000000C0
+#define CR_KEY128 0x00000000
+#define CR_KEY192 0x00000100
+#define CR_KEY256 0x00000200
+#define CR_FFLUSH 0x00004000
+#define CR_CRYPEN 0x00008000
+#define CR_PH_INIT 0x00000000
+#define CR_PH_HEADER 0x00010000
+#define CR_PH_PAYLOAD 0x00020000
+#define CR_PH_FINAL 0x00030000
+#define CR_PH_MASK 0x00030000
+#define CR_NBPBL_SHIFT 20
+
+#define SR_BUSY 0x00000010
+#define SR_OFNE 0x00000004
+
+#define IMSCR_IN BIT(0)
+#define IMSCR_OUT BIT(1)
+
+#define MISR_IN BIT(0)
+#define MISR_OUT BIT(1)
+
+/* Misc */
+#define AES_BLOCK_32 (AES_BLOCK_SIZE / sizeof(u32))
+#define GCM_CTR_INIT 2
+#define _walked_in (cryp->in_walk.offset - cryp->in_sg->offset)
+#define _walked_out (cryp->out_walk.offset - cryp->out_sg->offset)
+#define CRYP_AUTOSUSPEND_DELAY 50
+
+struct stm32_cryp_caps {
+ bool swap_final;
+ bool padding_wa;
+};
+
+struct stm32_cryp_ctx {
+ struct crypto_engine_ctx enginectx;
+ struct stm32_cryp *cryp;
+ int keylen;
+ u32 key[AES_KEYSIZE_256 / sizeof(u32)];
+ unsigned long flags;
+};
+
+struct stm32_cryp_reqctx {
+ unsigned long mode;
+};
+
+struct stm32_cryp {
+ struct list_head list;
+ struct device *dev;
+ void __iomem *regs;
+ struct clk *clk;
+ unsigned long flags;
+ u32 irq_status;
+ const struct stm32_cryp_caps *caps;
+ struct stm32_cryp_ctx *ctx;
+
+ struct crypto_engine *engine;
+
+ struct mutex lock; /* protects req / areq */
+ struct ablkcipher_request *req;
+ struct aead_request *areq;
+
+ size_t authsize;
+ size_t hw_blocksize;
+
+ size_t total_in;
+ size_t total_in_save;
+ size_t total_out;
+ size_t total_out_save;
+
+ struct scatterlist *in_sg;
+ struct scatterlist *out_sg;
+ struct scatterlist *out_sg_save;
+
+ struct scatterlist in_sgl;
+ struct scatterlist out_sgl;
+ bool sgs_copied;
+
+ int in_sg_len;
+ int out_sg_len;
+
+ struct scatter_walk in_walk;
+ struct scatter_walk out_walk;
+
+ u32 last_ctr[4];
+ u32 gcm_ctr;
+};
+
+struct stm32_cryp_list {
+ struct list_head dev_list;
+ spinlock_t lock; /* protect dev_list */
+};
+
+static struct stm32_cryp_list cryp_list = {
+ .dev_list = LIST_HEAD_INIT(cryp_list.dev_list),
+ .lock = __SPIN_LOCK_UNLOCKED(cryp_list.lock),
+};
+
+static inline bool is_aes(struct stm32_cryp *cryp)
+{
+ return cryp->flags & FLG_AES;
+}
+
+static inline bool is_des(struct stm32_cryp *cryp)
+{
+ return cryp->flags & FLG_DES;
+}
+
+static inline bool is_tdes(struct stm32_cryp *cryp)
+{
+ return cryp->flags & FLG_TDES;
+}
+
+static inline bool is_ecb(struct stm32_cryp *cryp)
+{
+ return cryp->flags & FLG_ECB;
+}
+
+static inline bool is_cbc(struct stm32_cryp *cryp)
+{
+ return cryp->flags & FLG_CBC;
+}
+
+static inline bool is_ctr(struct stm32_cryp *cryp)
+{
+ return cryp->flags & FLG_CTR;
+}
+
+static inline bool is_gcm(struct stm32_cryp *cryp)
+{
+ return cryp->flags & FLG_GCM;
+}
+
+static inline bool is_ccm(struct stm32_cryp *cryp)
+{
+ return cryp->flags & FLG_CCM;
+}
+
+static inline bool is_encrypt(struct stm32_cryp *cryp)
+{
+ return cryp->flags & FLG_ENCRYPT;
+}
+
+static inline bool is_decrypt(struct stm32_cryp *cryp)
+{
+ return !is_encrypt(cryp);
+}
+
+static inline u32 stm32_cryp_read(struct stm32_cryp *cryp, u32 ofst)
+{
+ return readl_relaxed(cryp->regs + ofst);
+}
+
+static inline void stm32_cryp_write(struct stm32_cryp *cryp, u32 ofst, u32 val)
+{
+ writel_relaxed(val, cryp->regs + ofst);
+}
+
+static inline int stm32_cryp_wait_busy(struct stm32_cryp *cryp)
+{
+ u32 status;
+
+ return readl_relaxed_poll_timeout(cryp->regs + CRYP_SR, status,
+ !(status & SR_BUSY), 10, 100000);
+}
+
+static inline int stm32_cryp_wait_enable(struct stm32_cryp *cryp)
+{
+ u32 status;
+
+ return readl_relaxed_poll_timeout(cryp->regs + CRYP_CR, status,
+ !(status & CR_CRYPEN), 10, 100000);
+}
+
+static inline int stm32_cryp_wait_output(struct stm32_cryp *cryp)
+{
+ u32 status;
+
+ return readl_relaxed_poll_timeout(cryp->regs + CRYP_SR, status,
+ status & SR_OFNE, 10, 100000);
+}
+
+static int stm32_cryp_read_auth_tag(struct stm32_cryp *cryp);
+
+static struct stm32_cryp *stm32_cryp_find_dev(struct stm32_cryp_ctx *ctx)
+{
+ struct stm32_cryp *tmp, *cryp = NULL;
+
+ spin_lock_bh(&cryp_list.lock);
+ if (!ctx->cryp) {
+ list_for_each_entry(tmp, &cryp_list.dev_list, list) {
+ cryp = tmp;
+ break;
+ }
+ ctx->cryp = cryp;
+ } else {
+ cryp = ctx->cryp;
+ }
+
+ spin_unlock_bh(&cryp_list.lock);
+
+ return cryp;
+}
+
+static int stm32_cryp_check_aligned(struct scatterlist *sg, size_t total,
+ size_t align)
+{
+ int len = 0;
+
+ if (!total)
+ return 0;
+
+ if (!IS_ALIGNED(total, align))
+ return -EINVAL;
+
+ while (sg) {
+ if (!IS_ALIGNED(sg->offset, sizeof(u32)))
+ return -EINVAL;
+
+ if (!IS_ALIGNED(sg->length, align))
+ return -EINVAL;
+
+ len += sg->length;
+ sg = sg_next(sg);
+ }
+
+ if (len != total)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int stm32_cryp_check_io_aligned(struct stm32_cryp *cryp)
+{
+ int ret;
+
+ ret = stm32_cryp_check_aligned(cryp->in_sg, cryp->total_in,
+ cryp->hw_blocksize);
+ if (ret)
+ return ret;
+
+ ret = stm32_cryp_check_aligned(cryp->out_sg, cryp->total_out,
+ cryp->hw_blocksize);
+
+ return ret;
+}
+
+static void sg_copy_buf(void *buf, struct scatterlist *sg,
+ unsigned int start, unsigned int nbytes, int out)
+{
+ struct scatter_walk walk;
+
+ if (!nbytes)
+ return;
+
+ scatterwalk_start(&walk, sg);
+ scatterwalk_advance(&walk, start);
+ scatterwalk_copychunks(buf, &walk, nbytes, out);
+ scatterwalk_done(&walk, out, 0);
+}
+
+static int stm32_cryp_copy_sgs(struct stm32_cryp *cryp)
+{
+ void *buf_in, *buf_out;
+ int pages, total_in, total_out;
+
+ if (!stm32_cryp_check_io_aligned(cryp)) {
+ cryp->sgs_copied = 0;
+ return 0;
+ }
+
+ total_in = ALIGN(cryp->total_in, cryp->hw_blocksize);
+ pages = total_in ? get_order(total_in) : 1;
+ buf_in = (void *)__get_free_pages(GFP_ATOMIC, pages);
+
+ total_out = ALIGN(cryp->total_out, cryp->hw_blocksize);
+ pages = total_out ? get_order(total_out) : 1;
+ buf_out = (void *)__get_free_pages(GFP_ATOMIC, pages);
+
+ if (!buf_in || !buf_out) {
+ dev_err(cryp->dev, "Can't allocate pages when unaligned\n");
+ cryp->sgs_copied = 0;
+ return -EFAULT;
+ }
+
+ sg_copy_buf(buf_in, cryp->in_sg, 0, cryp->total_in, 0);
+
+ sg_init_one(&cryp->in_sgl, buf_in, total_in);
+ cryp->in_sg = &cryp->in_sgl;
+ cryp->in_sg_len = 1;
+
+ sg_init_one(&cryp->out_sgl, buf_out, total_out);
+ cryp->out_sg_save = cryp->out_sg;
+ cryp->out_sg = &cryp->out_sgl;
+ cryp->out_sg_len = 1;
+
+ cryp->sgs_copied = 1;
+
+ return 0;
+}
+
+static void stm32_cryp_hw_write_iv(struct stm32_cryp *cryp, u32 *iv)
+{
+ if (!iv)
+ return;
+
+ stm32_cryp_write(cryp, CRYP_IV0LR, cpu_to_be32(*iv++));
+ stm32_cryp_write(cryp, CRYP_IV0RR, cpu_to_be32(*iv++));
+
+ if (is_aes(cryp)) {
+ stm32_cryp_write(cryp, CRYP_IV1LR, cpu_to_be32(*iv++));
+ stm32_cryp_write(cryp, CRYP_IV1RR, cpu_to_be32(*iv++));
+ }
+}
+
+static void stm32_cryp_hw_write_key(struct stm32_cryp *c)
+{
+ unsigned int i;
+ int r_id;
+
+ if (is_des(c)) {
+ stm32_cryp_write(c, CRYP_K1LR, cpu_to_be32(c->ctx->key[0]));
+ stm32_cryp_write(c, CRYP_K1RR, cpu_to_be32(c->ctx->key[1]));
+ } else {
+ r_id = CRYP_K3RR;
+ for (i = c->ctx->keylen / sizeof(u32); i > 0; i--, r_id -= 4)
+ stm32_cryp_write(c, r_id,
+ cpu_to_be32(c->ctx->key[i - 1]));
+ }
+}
+
+static u32 stm32_cryp_get_hw_mode(struct stm32_cryp *cryp)
+{
+ if (is_aes(cryp) && is_ecb(cryp))
+ return CR_AES_ECB;
+
+ if (is_aes(cryp) && is_cbc(cryp))
+ return CR_AES_CBC;
+
+ if (is_aes(cryp) && is_ctr(cryp))
+ return CR_AES_CTR;
+
+ if (is_aes(cryp) && is_gcm(cryp))
+ return CR_AES_GCM;
+
+ if (is_aes(cryp) && is_ccm(cryp))
+ return CR_AES_CCM;
+
+ if (is_des(cryp) && is_ecb(cryp))
+ return CR_DES_ECB;
+
+ if (is_des(cryp) && is_cbc(cryp))
+ return CR_DES_CBC;
+
+ if (is_tdes(cryp) && is_ecb(cryp))
+ return CR_TDES_ECB;
+
+ if (is_tdes(cryp) && is_cbc(cryp))
+ return CR_TDES_CBC;
+
+ dev_err(cryp->dev, "Unknown mode\n");
+ return CR_AES_UNKNOWN;
+}
+
+static unsigned int stm32_cryp_get_input_text_len(struct stm32_cryp *cryp)
+{
+ return is_encrypt(cryp) ? cryp->areq->cryptlen :
+ cryp->areq->cryptlen - cryp->authsize;
+}
+
+static int stm32_cryp_gcm_init(struct stm32_cryp *cryp, u32 cfg)
+{
+ int ret;
+ u32 iv[4];
+
+ /* Phase 1 : init */
+ memcpy(iv, cryp->areq->iv, 12);
+ iv[3] = cpu_to_be32(GCM_CTR_INIT);
+ cryp->gcm_ctr = GCM_CTR_INIT;
+ stm32_cryp_hw_write_iv(cryp, iv);
+
+ stm32_cryp_write(cryp, CRYP_CR, cfg | CR_PH_INIT | CR_CRYPEN);
+
+ /* Wait for end of processing */
+ ret = stm32_cryp_wait_enable(cryp);
+ if (ret)
+ dev_err(cryp->dev, "Timeout (gcm init)\n");
+
+ return ret;
+}
+
+static int stm32_cryp_ccm_init(struct stm32_cryp *cryp, u32 cfg)
+{
+ int ret;
+ u8 iv[AES_BLOCK_SIZE], b0[AES_BLOCK_SIZE];
+ u32 *d;
+ unsigned int i, textlen;
+
+ /* Phase 1 : init. Firstly set the CTR value to 1 (not 0) */
+ memcpy(iv, cryp->areq->iv, AES_BLOCK_SIZE);
+ memset(iv + AES_BLOCK_SIZE - 1 - iv[0], 0, iv[0] + 1);
+ iv[AES_BLOCK_SIZE - 1] = 1;
+ stm32_cryp_hw_write_iv(cryp, (u32 *)iv);
+
+ /* Build B0 */
+ memcpy(b0, iv, AES_BLOCK_SIZE);
+
+ b0[0] |= (8 * ((cryp->authsize - 2) / 2));
+
+ if (cryp->areq->assoclen)
+ b0[0] |= 0x40;
+
+ textlen = stm32_cryp_get_input_text_len(cryp);
+
+ b0[AES_BLOCK_SIZE - 2] = textlen >> 8;
+ b0[AES_BLOCK_SIZE - 1] = textlen & 0xFF;
+
+ /* Enable HW */
+ stm32_cryp_write(cryp, CRYP_CR, cfg | CR_PH_INIT | CR_CRYPEN);
+
+ /* Write B0 */
+ d = (u32 *)b0;
+
+ for (i = 0; i < AES_BLOCK_32; i++) {
+ if (!cryp->caps->padding_wa)
+ *d = cpu_to_be32(*d);
+ stm32_cryp_write(cryp, CRYP_DIN, *d++);
+ }
+
+ /* Wait for end of processing */
+ ret = stm32_cryp_wait_enable(cryp);
+ if (ret)
+ dev_err(cryp->dev, "Timeout (ccm init)\n");
+
+ return ret;
+}
+
+static int stm32_cryp_hw_init(struct stm32_cryp *cryp)
+{
+ int ret;
+ u32 cfg, hw_mode;
+
+ pm_runtime_get_sync(cryp->dev);
+
+ /* Disable interrupt */
+ stm32_cryp_write(cryp, CRYP_IMSCR, 0);
+
+ /* Set key */
+ stm32_cryp_hw_write_key(cryp);
+
+ /* Set configuration */
+ cfg = CR_DATA8 | CR_FFLUSH;
+
+ switch (cryp->ctx->keylen) {
+ case AES_KEYSIZE_128:
+ cfg |= CR_KEY128;
+ break;
+
+ case AES_KEYSIZE_192:
+ cfg |= CR_KEY192;
+ break;
+
+ default:
+ case AES_KEYSIZE_256:
+ cfg |= CR_KEY256;
+ break;
+ }
+
+ hw_mode = stm32_cryp_get_hw_mode(cryp);
+ if (hw_mode == CR_AES_UNKNOWN)
+ return -EINVAL;
+
+ /* AES ECB/CBC decrypt: run key preparation first */
+ if (is_decrypt(cryp) &&
+ ((hw_mode == CR_AES_ECB) || (hw_mode == CR_AES_CBC))) {
+ stm32_cryp_write(cryp, CRYP_CR, cfg | CR_AES_KP | CR_CRYPEN);
+
+ /* Wait for end of processing */
+ ret = stm32_cryp_wait_busy(cryp);
+ if (ret) {
+ dev_err(cryp->dev, "Timeout (key preparation)\n");
+ return ret;
+ }
+ }
+
+ cfg |= hw_mode;
+
+ if (is_decrypt(cryp))
+ cfg |= CR_DEC_NOT_ENC;
+
+ /* Apply config and flush (valid when CRYPEN = 0) */
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+
+ switch (hw_mode) {
+ case CR_AES_GCM:
+ case CR_AES_CCM:
+ /* Phase 1 : init */
+ if (hw_mode == CR_AES_CCM)
+ ret = stm32_cryp_ccm_init(cryp, cfg);
+ else
+ ret = stm32_cryp_gcm_init(cryp, cfg);
+
+ if (ret)
+ return ret;
+
+ /* Phase 2 : header (authenticated data) */
+ if (cryp->areq->assoclen) {
+ cfg |= CR_PH_HEADER;
+ } else if (stm32_cryp_get_input_text_len(cryp)) {
+ cfg |= CR_PH_PAYLOAD;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+ } else {
+ cfg |= CR_PH_INIT;
+ }
+
+ break;
+
+ case CR_DES_CBC:
+ case CR_TDES_CBC:
+ case CR_AES_CBC:
+ case CR_AES_CTR:
+ stm32_cryp_hw_write_iv(cryp, (u32 *)cryp->req->info);
+ break;
+
+ default:
+ break;
+ }
+
+ /* Enable now */
+ cfg |= CR_CRYPEN;
+
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+
+ cryp->flags &= ~FLG_CCM_PADDED_WA;
+
+ return 0;
+}
+
+static void stm32_cryp_finish_req(struct stm32_cryp *cryp, int err)
+{
+ if (!err && (is_gcm(cryp) || is_ccm(cryp)))
+ /* Phase 4 : output tag */
+ err = stm32_cryp_read_auth_tag(cryp);
+
+ if (cryp->sgs_copied) {
+ void *buf_in, *buf_out;
+ int pages, len;
+
+ buf_in = sg_virt(&cryp->in_sgl);
+ buf_out = sg_virt(&cryp->out_sgl);
+
+ sg_copy_buf(buf_out, cryp->out_sg_save, 0,
+ cryp->total_out_save, 1);
+
+ len = ALIGN(cryp->total_in_save, cryp->hw_blocksize);
+ pages = len ? get_order(len) : 1;
+ free_pages((unsigned long)buf_in, pages);
+
+ len = ALIGN(cryp->total_out_save, cryp->hw_blocksize);
+ pages = len ? get_order(len) : 1;
+ free_pages((unsigned long)buf_out, pages);
+ }
+
+ pm_runtime_mark_last_busy(cryp->dev);
+ pm_runtime_put_autosuspend(cryp->dev);
+
+ if (is_gcm(cryp) || is_ccm(cryp)) {
+ crypto_finalize_aead_request(cryp->engine, cryp->areq, err);
+ cryp->areq = NULL;
+ } else {
+ crypto_finalize_ablkcipher_request(cryp->engine, cryp->req,
+ err);
+ cryp->req = NULL;
+ }
+
+ memset(cryp->ctx->key, 0, cryp->ctx->keylen);
+
+ mutex_unlock(&cryp->lock);
+}
+
+static int stm32_cryp_cpu_start(struct stm32_cryp *cryp)
+{
+ /* Enable interrupt and let the IRQ handler do everything */
+ stm32_cryp_write(cryp, CRYP_IMSCR, IMSCR_IN | IMSCR_OUT);
+
+ return 0;
+}
+
+static int stm32_cryp_cipher_one_req(struct crypto_engine *engine, void *areq);
+static int stm32_cryp_prepare_cipher_req(struct crypto_engine *engine,
+ void *areq);
+
+static int stm32_cryp_cra_init(struct crypto_tfm *tfm)
+{
+ struct stm32_cryp_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ tfm->crt_ablkcipher.reqsize = sizeof(struct stm32_cryp_reqctx);
+
+ ctx->enginectx.op.do_one_request = stm32_cryp_cipher_one_req;
+ ctx->enginectx.op.prepare_request = stm32_cryp_prepare_cipher_req;
+ ctx->enginectx.op.unprepare_request = NULL;
+ return 0;
+}
+
+static int stm32_cryp_aead_one_req(struct crypto_engine *engine, void *areq);
+static int stm32_cryp_prepare_aead_req(struct crypto_engine *engine,
+ void *areq);
+
+static int stm32_cryp_aes_aead_init(struct crypto_aead *tfm)
+{
+ struct stm32_cryp_ctx *ctx = crypto_aead_ctx(tfm);
+
+ tfm->reqsize = sizeof(struct stm32_cryp_reqctx);
+
+ ctx->enginectx.op.do_one_request = stm32_cryp_aead_one_req;
+ ctx->enginectx.op.prepare_request = stm32_cryp_prepare_aead_req;
+ ctx->enginectx.op.unprepare_request = NULL;
+
+ return 0;
+}
+
+static int stm32_cryp_crypt(struct ablkcipher_request *req, unsigned long mode)
+{
+ struct stm32_cryp_ctx *ctx = crypto_ablkcipher_ctx(
+ crypto_ablkcipher_reqtfm(req));
+ struct stm32_cryp_reqctx *rctx = ablkcipher_request_ctx(req);
+ struct stm32_cryp *cryp = stm32_cryp_find_dev(ctx);
+
+ if (!cryp)
+ return -ENODEV;
+
+ rctx->mode = mode;
+
+ return crypto_transfer_ablkcipher_request_to_engine(cryp->engine, req);
+}
+
+static int stm32_cryp_aead_crypt(struct aead_request *req, unsigned long mode)
+{
+ struct stm32_cryp_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));
+ struct stm32_cryp_reqctx *rctx = aead_request_ctx(req);
+ struct stm32_cryp *cryp = stm32_cryp_find_dev(ctx);
+
+ if (!cryp)
+ return -ENODEV;
+
+ rctx->mode = mode;
+
+ return crypto_transfer_aead_request_to_engine(cryp->engine, req);
+}
+
+static int stm32_cryp_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct stm32_cryp_ctx *ctx = crypto_ablkcipher_ctx(tfm);
+
+ memcpy(ctx->key, key, keylen);
+ ctx->keylen = keylen;
+
+ return 0;
+}
+
+static int stm32_cryp_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ if (keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_192 &&
+ keylen != AES_KEYSIZE_256)
+ return -EINVAL;
+ else
+ return stm32_cryp_setkey(tfm, key, keylen);
+}
+
+static int stm32_cryp_des_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ if (keylen != DES_KEY_SIZE)
+ return -EINVAL;
+ else
+ return stm32_cryp_setkey(tfm, key, keylen);
+}
+
+static int stm32_cryp_tdes_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ if (keylen != (3 * DES_KEY_SIZE))
+ return -EINVAL;
+ else
+ return stm32_cryp_setkey(tfm, key, keylen);
+}
+
+static int stm32_cryp_aes_aead_setkey(struct crypto_aead *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct stm32_cryp_ctx *ctx = crypto_aead_ctx(tfm);
+
+ if (keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_192 &&
+ keylen != AES_KEYSIZE_256)
+ return -EINVAL;
+
+ memcpy(ctx->key, key, keylen);
+ ctx->keylen = keylen;
+
+ return 0;
+}
+
+static int stm32_cryp_aes_gcm_setauthsize(struct crypto_aead *tfm,
+ unsigned int authsize)
+{
+ return authsize == AES_BLOCK_SIZE ? 0 : -EINVAL;
+}
+
+static int stm32_cryp_aes_ccm_setauthsize(struct crypto_aead *tfm,
+ unsigned int authsize)
+{
+ switch (authsize) {
+ case 4:
+ case 6:
+ case 8:
+ case 10:
+ case 12:
+ case 14:
+ case 16:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int stm32_cryp_aes_ecb_encrypt(struct ablkcipher_request *req)
+{
+ return stm32_cryp_crypt(req, FLG_AES | FLG_ECB | FLG_ENCRYPT);
+}
+
+static int stm32_cryp_aes_ecb_decrypt(struct ablkcipher_request *req)
+{
+ return stm32_cryp_crypt(req, FLG_AES | FLG_ECB);
+}
+
+static int stm32_cryp_aes_cbc_encrypt(struct ablkcipher_request *req)
+{
+ return stm32_cryp_crypt(req, FLG_AES | FLG_CBC | FLG_ENCRYPT);
+}
+
+static int stm32_cryp_aes_cbc_decrypt(struct ablkcipher_request *req)
+{
+ return stm32_cryp_crypt(req, FLG_AES | FLG_CBC);
+}
+
+static int stm32_cryp_aes_ctr_encrypt(struct ablkcipher_request *req)
+{
+ return stm32_cryp_crypt(req, FLG_AES | FLG_CTR | FLG_ENCRYPT);
+}
+
+static int stm32_cryp_aes_ctr_decrypt(struct ablkcipher_request *req)
+{
+ return stm32_cryp_crypt(req, FLG_AES | FLG_CTR);
+}
+
+static int stm32_cryp_aes_gcm_encrypt(struct aead_request *req)
+{
+ return stm32_cryp_aead_crypt(req, FLG_AES | FLG_GCM | FLG_ENCRYPT);
+}
+
+static int stm32_cryp_aes_gcm_decrypt(struct aead_request *req)
+{
+ return stm32_cryp_aead_crypt(req, FLG_AES | FLG_GCM);
+}
+
+static int stm32_cryp_aes_ccm_encrypt(struct aead_request *req)
+{
+ return stm32_cryp_aead_crypt(req, FLG_AES | FLG_CCM | FLG_ENCRYPT);
+}
+
+static int stm32_cryp_aes_ccm_decrypt(struct aead_request *req)
+{
+ return stm32_cryp_aead_crypt(req, FLG_AES | FLG_CCM);
+}
+
+static int stm32_cryp_des_ecb_encrypt(struct ablkcipher_request *req)
+{
+ return stm32_cryp_crypt(req, FLG_DES | FLG_ECB | FLG_ENCRYPT);
+}
+
+static int stm32_cryp_des_ecb_decrypt(struct ablkcipher_request *req)
+{
+ return stm32_cryp_crypt(req, FLG_DES | FLG_ECB);
+}
+
+static int stm32_cryp_des_cbc_encrypt(struct ablkcipher_request *req)
+{
+ return stm32_cryp_crypt(req, FLG_DES | FLG_CBC | FLG_ENCRYPT);
+}
+
+static int stm32_cryp_des_cbc_decrypt(struct ablkcipher_request *req)
+{
+ return stm32_cryp_crypt(req, FLG_DES | FLG_CBC);
+}
+
+static int stm32_cryp_tdes_ecb_encrypt(struct ablkcipher_request *req)
+{
+ return stm32_cryp_crypt(req, FLG_TDES | FLG_ECB | FLG_ENCRYPT);
+}
+
+static int stm32_cryp_tdes_ecb_decrypt(struct ablkcipher_request *req)
+{
+ return stm32_cryp_crypt(req, FLG_TDES | FLG_ECB);
+}
+
+static int stm32_cryp_tdes_cbc_encrypt(struct ablkcipher_request *req)
+{
+ return stm32_cryp_crypt(req, FLG_TDES | FLG_CBC | FLG_ENCRYPT);
+}
+
+static int stm32_cryp_tdes_cbc_decrypt(struct ablkcipher_request *req)
+{
+ return stm32_cryp_crypt(req, FLG_TDES | FLG_CBC);
+}
+
+static int stm32_cryp_prepare_req(struct ablkcipher_request *req,
+ struct aead_request *areq)
+{
+ struct stm32_cryp_ctx *ctx;
+ struct stm32_cryp *cryp;
+ struct stm32_cryp_reqctx *rctx;
+ int ret;
+
+ if (!req && !areq)
+ return -EINVAL;
+
+ ctx = req ? crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req)) :
+ crypto_aead_ctx(crypto_aead_reqtfm(areq));
+
+ cryp = ctx->cryp;
+
+ if (!cryp)
+ return -ENODEV;
+
+ mutex_lock(&cryp->lock);
+
+ rctx = req ? ablkcipher_request_ctx(req) : aead_request_ctx(areq);
+ rctx->mode &= FLG_MODE_MASK;
+
+ ctx->cryp = cryp;
+
+ cryp->flags = (cryp->flags & ~FLG_MODE_MASK) | rctx->mode;
+ cryp->hw_blocksize = is_aes(cryp) ? AES_BLOCK_SIZE : DES_BLOCK_SIZE;
+ cryp->ctx = ctx;
+
+ if (req) {
+ cryp->req = req;
+ cryp->total_in = req->nbytes;
+ cryp->total_out = cryp->total_in;
+ } else {
+ /*
+ * Length of input and output data:
+ * Encryption case:
+ * INPUT = AssocData || PlainText
+ * <- assoclen -> <- cryptlen ->
+ * <------- total_in ----------->
+ *
+ * OUTPUT = AssocData || CipherText || AuthTag
+ * <- assoclen -> <- cryptlen -> <- authsize ->
+ * <---------------- total_out ----------------->
+ *
+ * Decryption case:
+ * INPUT = AssocData || CipherText || AuthTag
+ * <- assoclen -> <--------- cryptlen --------->
+ * <- authsize ->
+ * <---------------- total_in ------------------>
+ *
+ * OUTPUT = AssocData || PlainText
+ * <- assoclen -> <- crypten - authsize ->
+ * <---------- total_out ----------------->
+ */
+ cryp->areq = areq;
+ cryp->authsize = crypto_aead_authsize(crypto_aead_reqtfm(areq));
+ cryp->total_in = areq->assoclen + areq->cryptlen;
+ if (is_encrypt(cryp))
+ /* Append auth tag to output */
+ cryp->total_out = cryp->total_in + cryp->authsize;
+ else
+ /* No auth tag in output */
+ cryp->total_out = cryp->total_in - cryp->authsize;
+ }
+
+ cryp->total_in_save = cryp->total_in;
+ cryp->total_out_save = cryp->total_out;
+
+ cryp->in_sg = req ? req->src : areq->src;
+ cryp->out_sg = req ? req->dst : areq->dst;
+ cryp->out_sg_save = cryp->out_sg;
+
+ cryp->in_sg_len = sg_nents_for_len(cryp->in_sg, cryp->total_in);
+ if (cryp->in_sg_len < 0) {
+ dev_err(cryp->dev, "Cannot get in_sg_len\n");
+ ret = cryp->in_sg_len;
+ goto out;
+ }
+
+ cryp->out_sg_len = sg_nents_for_len(cryp->out_sg, cryp->total_out);
+ if (cryp->out_sg_len < 0) {
+ dev_err(cryp->dev, "Cannot get out_sg_len\n");
+ ret = cryp->out_sg_len;
+ goto out;
+ }
+
+ ret = stm32_cryp_copy_sgs(cryp);
+ if (ret)
+ goto out;
+
+ scatterwalk_start(&cryp->in_walk, cryp->in_sg);
+ scatterwalk_start(&cryp->out_walk, cryp->out_sg);
+
+ if (is_gcm(cryp) || is_ccm(cryp)) {
+ /* In output, jump after assoc data */
+ scatterwalk_advance(&cryp->out_walk, cryp->areq->assoclen);
+ cryp->total_out -= cryp->areq->assoclen;
+ }
+
+ ret = stm32_cryp_hw_init(cryp);
+out:
+ if (ret)
+ mutex_unlock(&cryp->lock);
+
+ return ret;
+}
+
+static int stm32_cryp_prepare_cipher_req(struct crypto_engine *engine,
+ void *areq)
+{
+ struct ablkcipher_request *req = container_of(areq,
+ struct ablkcipher_request,
+ base);
+
+ return stm32_cryp_prepare_req(req, NULL);
+}
+
+static int stm32_cryp_cipher_one_req(struct crypto_engine *engine, void *areq)
+{
+ struct ablkcipher_request *req = container_of(areq,
+ struct ablkcipher_request,
+ base);
+ struct stm32_cryp_ctx *ctx = crypto_ablkcipher_ctx(
+ crypto_ablkcipher_reqtfm(req));
+ struct stm32_cryp *cryp = ctx->cryp;
+
+ if (!cryp)
+ return -ENODEV;
+
+ return stm32_cryp_cpu_start(cryp);
+}
+
+static int stm32_cryp_prepare_aead_req(struct crypto_engine *engine, void *areq)
+{
+ struct aead_request *req = container_of(areq, struct aead_request,
+ base);
+
+ return stm32_cryp_prepare_req(NULL, req);
+}
+
+static int stm32_cryp_aead_one_req(struct crypto_engine *engine, void *areq)
+{
+ struct aead_request *req = container_of(areq, struct aead_request,
+ base);
+ struct stm32_cryp_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));
+ struct stm32_cryp *cryp = ctx->cryp;
+
+ if (!cryp)
+ return -ENODEV;
+
+ if (unlikely(!cryp->areq->assoclen &&
+ !stm32_cryp_get_input_text_len(cryp))) {
+ /* No input data to process: get tag and finish */
+ stm32_cryp_finish_req(cryp, 0);
+ return 0;
+ }
+
+ return stm32_cryp_cpu_start(cryp);
+}
+
+static u32 *stm32_cryp_next_out(struct stm32_cryp *cryp, u32 *dst,
+ unsigned int n)
+{
+ scatterwalk_advance(&cryp->out_walk, n);
+
+ if (unlikely(cryp->out_sg->length == _walked_out)) {
+ cryp->out_sg = sg_next(cryp->out_sg);
+ if (cryp->out_sg) {
+ scatterwalk_start(&cryp->out_walk, cryp->out_sg);
+ return (sg_virt(cryp->out_sg) + _walked_out);
+ }
+ }
+
+ return (u32 *)((u8 *)dst + n);
+}
+
+static u32 *stm32_cryp_next_in(struct stm32_cryp *cryp, u32 *src,
+ unsigned int n)
+{
+ scatterwalk_advance(&cryp->in_walk, n);
+
+ if (unlikely(cryp->in_sg->length == _walked_in)) {
+ cryp->in_sg = sg_next(cryp->in_sg);
+ if (cryp->in_sg) {
+ scatterwalk_start(&cryp->in_walk, cryp->in_sg);
+ return (sg_virt(cryp->in_sg) + _walked_in);
+ }
+ }
+
+ return (u32 *)((u8 *)src + n);
+}
+
+static int stm32_cryp_read_auth_tag(struct stm32_cryp *cryp)
+{
+ u32 cfg, size_bit, *dst, d32;
+ u8 *d8;
+ unsigned int i, j;
+ int ret = 0;
+
+ /* Update Config */
+ cfg = stm32_cryp_read(cryp, CRYP_CR);
+
+ cfg &= ~CR_PH_MASK;
+ cfg |= CR_PH_FINAL;
+ cfg &= ~CR_DEC_NOT_ENC;
+ cfg |= CR_CRYPEN;
+
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+
+ if (is_gcm(cryp)) {
+ /* GCM: write aad and payload size (in bits) */
+ size_bit = cryp->areq->assoclen * 8;
+ if (cryp->caps->swap_final)
+ size_bit = cpu_to_be32(size_bit);
+
+ stm32_cryp_write(cryp, CRYP_DIN, 0);
+ stm32_cryp_write(cryp, CRYP_DIN, size_bit);
+
+ size_bit = is_encrypt(cryp) ? cryp->areq->cryptlen :
+ cryp->areq->cryptlen - AES_BLOCK_SIZE;
+ size_bit *= 8;
+ if (cryp->caps->swap_final)
+ size_bit = cpu_to_be32(size_bit);
+
+ stm32_cryp_write(cryp, CRYP_DIN, 0);
+ stm32_cryp_write(cryp, CRYP_DIN, size_bit);
+ } else {
+ /* CCM: write CTR0 */
+ u8 iv[AES_BLOCK_SIZE];
+ u32 *iv32 = (u32 *)iv;
+
+ memcpy(iv, cryp->areq->iv, AES_BLOCK_SIZE);
+ memset(iv + AES_BLOCK_SIZE - 1 - iv[0], 0, iv[0] + 1);
+
+ for (i = 0; i < AES_BLOCK_32; i++) {
+ if (!cryp->caps->padding_wa)
+ *iv32 = cpu_to_be32(*iv32);
+ stm32_cryp_write(cryp, CRYP_DIN, *iv32++);
+ }
+ }
+
+ /* Wait for output data */
+ ret = stm32_cryp_wait_output(cryp);
+ if (ret) {
+ dev_err(cryp->dev, "Timeout (read tag)\n");
+ return ret;
+ }
+
+ if (is_encrypt(cryp)) {
+ /* Get and write tag */
+ dst = sg_virt(cryp->out_sg) + _walked_out;
+
+ for (i = 0; i < AES_BLOCK_32; i++) {
+ if (cryp->total_out >= sizeof(u32)) {
+ /* Read a full u32 */
+ *dst = stm32_cryp_read(cryp, CRYP_DOUT);
+
+ dst = stm32_cryp_next_out(cryp, dst,
+ sizeof(u32));
+ cryp->total_out -= sizeof(u32);
+ } else if (!cryp->total_out) {
+ /* Empty fifo out (data from input padding) */
+ stm32_cryp_read(cryp, CRYP_DOUT);
+ } else {
+ /* Read less than an u32 */
+ d32 = stm32_cryp_read(cryp, CRYP_DOUT);
+ d8 = (u8 *)&d32;
+
+ for (j = 0; j < cryp->total_out; j++) {
+ *((u8 *)dst) = *(d8++);
+ dst = stm32_cryp_next_out(cryp, dst, 1);
+ }
+ cryp->total_out = 0;
+ }
+ }
+ } else {
+ /* Get and check tag */
+ u32 in_tag[AES_BLOCK_32], out_tag[AES_BLOCK_32];
+
+ scatterwalk_map_and_copy(in_tag, cryp->in_sg,
+ cryp->total_in_save - cryp->authsize,
+ cryp->authsize, 0);
+
+ for (i = 0; i < AES_BLOCK_32; i++)
+ out_tag[i] = stm32_cryp_read(cryp, CRYP_DOUT);
+
+ if (crypto_memneq(in_tag, out_tag, cryp->authsize))
+ ret = -EBADMSG;
+ }
+
+ /* Disable cryp */
+ cfg &= ~CR_CRYPEN;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+
+ return ret;
+}
+
+static void stm32_cryp_check_ctr_counter(struct stm32_cryp *cryp)
+{
+ u32 cr;
+
+ if (unlikely(cryp->last_ctr[3] == 0xFFFFFFFF)) {
+ cryp->last_ctr[3] = 0;
+ cryp->last_ctr[2]++;
+ if (!cryp->last_ctr[2]) {
+ cryp->last_ctr[1]++;
+ if (!cryp->last_ctr[1])
+ cryp->last_ctr[0]++;
+ }
+
+ cr = stm32_cryp_read(cryp, CRYP_CR);
+ stm32_cryp_write(cryp, CRYP_CR, cr & ~CR_CRYPEN);
+
+ stm32_cryp_hw_write_iv(cryp, (u32 *)cryp->last_ctr);
+
+ stm32_cryp_write(cryp, CRYP_CR, cr);
+ }
+
+ cryp->last_ctr[0] = stm32_cryp_read(cryp, CRYP_IV0LR);
+ cryp->last_ctr[1] = stm32_cryp_read(cryp, CRYP_IV0RR);
+ cryp->last_ctr[2] = stm32_cryp_read(cryp, CRYP_IV1LR);
+ cryp->last_ctr[3] = stm32_cryp_read(cryp, CRYP_IV1RR);
+}
+
+static bool stm32_cryp_irq_read_data(struct stm32_cryp *cryp)
+{
+ unsigned int i, j;
+ u32 d32, *dst;
+ u8 *d8;
+ size_t tag_size;
+
+ /* Do no read tag now (if any) */
+ if (is_encrypt(cryp) && (is_gcm(cryp) || is_ccm(cryp)))
+ tag_size = cryp->authsize;
+ else
+ tag_size = 0;
+
+ dst = sg_virt(cryp->out_sg) + _walked_out;
+
+ for (i = 0; i < cryp->hw_blocksize / sizeof(u32); i++) {
+ if (likely(cryp->total_out - tag_size >= sizeof(u32))) {
+ /* Read a full u32 */
+ *dst = stm32_cryp_read(cryp, CRYP_DOUT);
+
+ dst = stm32_cryp_next_out(cryp, dst, sizeof(u32));
+ cryp->total_out -= sizeof(u32);
+ } else if (cryp->total_out == tag_size) {
+ /* Empty fifo out (data from input padding) */
+ d32 = stm32_cryp_read(cryp, CRYP_DOUT);
+ } else {
+ /* Read less than an u32 */
+ d32 = stm32_cryp_read(cryp, CRYP_DOUT);
+ d8 = (u8 *)&d32;
+
+ for (j = 0; j < cryp->total_out - tag_size; j++) {
+ *((u8 *)dst) = *(d8++);
+ dst = stm32_cryp_next_out(cryp, dst, 1);
+ }
+ cryp->total_out = tag_size;
+ }
+ }
+
+ return !(cryp->total_out - tag_size) || !cryp->total_in;
+}
+
+static void stm32_cryp_irq_write_block(struct stm32_cryp *cryp)
+{
+ unsigned int i, j;
+ u32 *src;
+ u8 d8[4];
+ size_t tag_size;
+
+ /* Do no write tag (if any) */
+ if (is_decrypt(cryp) && (is_gcm(cryp) || is_ccm(cryp)))
+ tag_size = cryp->authsize;
+ else
+ tag_size = 0;
+
+ src = sg_virt(cryp->in_sg) + _walked_in;
+
+ for (i = 0; i < cryp->hw_blocksize / sizeof(u32); i++) {
+ if (likely(cryp->total_in - tag_size >= sizeof(u32))) {
+ /* Write a full u32 */
+ stm32_cryp_write(cryp, CRYP_DIN, *src);
+
+ src = stm32_cryp_next_in(cryp, src, sizeof(u32));
+ cryp->total_in -= sizeof(u32);
+ } else if (cryp->total_in == tag_size) {
+ /* Write padding data */
+ stm32_cryp_write(cryp, CRYP_DIN, 0);
+ } else {
+ /* Write less than an u32 */
+ memset(d8, 0, sizeof(u32));
+ for (j = 0; j < cryp->total_in - tag_size; j++) {
+ d8[j] = *((u8 *)src);
+ src = stm32_cryp_next_in(cryp, src, 1);
+ }
+
+ stm32_cryp_write(cryp, CRYP_DIN, *(u32 *)d8);
+ cryp->total_in = tag_size;
+ }
+ }
+}
+
+static void stm32_cryp_irq_write_gcm_padded_data(struct stm32_cryp *cryp)
+{
+ int err;
+ u32 cfg, tmp[AES_BLOCK_32];
+ size_t total_in_ori = cryp->total_in;
+ struct scatterlist *out_sg_ori = cryp->out_sg;
+ unsigned int i;
+
+ /* 'Special workaround' procedure described in the datasheet */
+
+ /* a) disable ip */
+ stm32_cryp_write(cryp, CRYP_IMSCR, 0);
+ cfg = stm32_cryp_read(cryp, CRYP_CR);
+ cfg &= ~CR_CRYPEN;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+
+ /* b) Update IV1R */
+ stm32_cryp_write(cryp, CRYP_IV1RR, cryp->gcm_ctr - 2);
+
+ /* c) change mode to CTR */
+ cfg &= ~CR_ALGO_MASK;
+ cfg |= CR_AES_CTR;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+
+ /* a) enable IP */
+ cfg |= CR_CRYPEN;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+
+ /* b) pad and write the last block */
+ stm32_cryp_irq_write_block(cryp);
+ cryp->total_in = total_in_ori;
+ err = stm32_cryp_wait_output(cryp);
+ if (err) {
+ dev_err(cryp->dev, "Timeout (write gcm header)\n");
+ return stm32_cryp_finish_req(cryp, err);
+ }
+
+ /* c) get and store encrypted data */
+ stm32_cryp_irq_read_data(cryp);
+ scatterwalk_map_and_copy(tmp, out_sg_ori,
+ cryp->total_in_save - total_in_ori,
+ total_in_ori, 0);
+
+ /* d) change mode back to AES GCM */
+ cfg &= ~CR_ALGO_MASK;
+ cfg |= CR_AES_GCM;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+
+ /* e) change phase to Final */
+ cfg &= ~CR_PH_MASK;
+ cfg |= CR_PH_FINAL;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+
+ /* f) write padded data */
+ for (i = 0; i < AES_BLOCK_32; i++) {
+ if (cryp->total_in)
+ stm32_cryp_write(cryp, CRYP_DIN, tmp[i]);
+ else
+ stm32_cryp_write(cryp, CRYP_DIN, 0);
+
+ cryp->total_in -= min_t(size_t, sizeof(u32), cryp->total_in);
+ }
+
+ /* g) Empty fifo out */
+ err = stm32_cryp_wait_output(cryp);
+ if (err) {
+ dev_err(cryp->dev, "Timeout (write gcm header)\n");
+ return stm32_cryp_finish_req(cryp, err);
+ }
+
+ for (i = 0; i < AES_BLOCK_32; i++)
+ stm32_cryp_read(cryp, CRYP_DOUT);
+
+ /* h) run the he normal Final phase */
+ stm32_cryp_finish_req(cryp, 0);
+}
+
+static void stm32_cryp_irq_set_npblb(struct stm32_cryp *cryp)
+{
+ u32 cfg, payload_bytes;
+
+ /* disable ip, set NPBLB and reneable ip */
+ cfg = stm32_cryp_read(cryp, CRYP_CR);
+ cfg &= ~CR_CRYPEN;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+
+ payload_bytes = is_decrypt(cryp) ? cryp->total_in - cryp->authsize :
+ cryp->total_in;
+ cfg |= (cryp->hw_blocksize - payload_bytes) << CR_NBPBL_SHIFT;
+ cfg |= CR_CRYPEN;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+}
+
+static void stm32_cryp_irq_write_ccm_padded_data(struct stm32_cryp *cryp)
+{
+ int err = 0;
+ u32 cfg, iv1tmp;
+ u32 cstmp1[AES_BLOCK_32], cstmp2[AES_BLOCK_32], tmp[AES_BLOCK_32];
+ size_t last_total_out, total_in_ori = cryp->total_in;
+ struct scatterlist *out_sg_ori = cryp->out_sg;
+ unsigned int i;
+
+ /* 'Special workaround' procedure described in the datasheet */
+ cryp->flags |= FLG_CCM_PADDED_WA;
+
+ /* a) disable ip */
+ stm32_cryp_write(cryp, CRYP_IMSCR, 0);
+
+ cfg = stm32_cryp_read(cryp, CRYP_CR);
+ cfg &= ~CR_CRYPEN;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+
+ /* b) get IV1 from CRYP_CSGCMCCM7 */
+ iv1tmp = stm32_cryp_read(cryp, CRYP_CSGCMCCM0R + 7 * 4);
+
+ /* c) Load CRYP_CSGCMCCMxR */
+ for (i = 0; i < ARRAY_SIZE(cstmp1); i++)
+ cstmp1[i] = stm32_cryp_read(cryp, CRYP_CSGCMCCM0R + i * 4);
+
+ /* d) Write IV1R */
+ stm32_cryp_write(cryp, CRYP_IV1RR, iv1tmp);
+
+ /* e) change mode to CTR */
+ cfg &= ~CR_ALGO_MASK;
+ cfg |= CR_AES_CTR;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+
+ /* a) enable IP */
+ cfg |= CR_CRYPEN;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+
+ /* b) pad and write the last block */
+ stm32_cryp_irq_write_block(cryp);
+ cryp->total_in = total_in_ori;
+ err = stm32_cryp_wait_output(cryp);
+ if (err) {
+ dev_err(cryp->dev, "Timeout (wite ccm padded data)\n");
+ return stm32_cryp_finish_req(cryp, err);
+ }
+
+ /* c) get and store decrypted data */
+ last_total_out = cryp->total_out;
+ stm32_cryp_irq_read_data(cryp);
+
+ memset(tmp, 0, sizeof(tmp));
+ scatterwalk_map_and_copy(tmp, out_sg_ori,
+ cryp->total_out_save - last_total_out,
+ last_total_out, 0);
+
+ /* d) Load again CRYP_CSGCMCCMxR */
+ for (i = 0; i < ARRAY_SIZE(cstmp2); i++)
+ cstmp2[i] = stm32_cryp_read(cryp, CRYP_CSGCMCCM0R + i * 4);
+
+ /* e) change mode back to AES CCM */
+ cfg &= ~CR_ALGO_MASK;
+ cfg |= CR_AES_CCM;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+
+ /* f) change phase to header */
+ cfg &= ~CR_PH_MASK;
+ cfg |= CR_PH_HEADER;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+
+ /* g) XOR and write padded data */
+ for (i = 0; i < ARRAY_SIZE(tmp); i++) {
+ tmp[i] ^= cstmp1[i];
+ tmp[i] ^= cstmp2[i];
+ stm32_cryp_write(cryp, CRYP_DIN, tmp[i]);
+ }
+
+ /* h) wait for completion */
+ err = stm32_cryp_wait_busy(cryp);
+ if (err)
+ dev_err(cryp->dev, "Timeout (wite ccm padded data)\n");
+
+ /* i) run the he normal Final phase */
+ stm32_cryp_finish_req(cryp, err);
+}
+
+static void stm32_cryp_irq_write_data(struct stm32_cryp *cryp)
+{
+ if (unlikely(!cryp->total_in)) {
+ dev_warn(cryp->dev, "No more data to process\n");
+ return;
+ }
+
+ if (unlikely(cryp->total_in < AES_BLOCK_SIZE &&
+ (stm32_cryp_get_hw_mode(cryp) == CR_AES_GCM) &&
+ is_encrypt(cryp))) {
+ /* Padding for AES GCM encryption */
+ if (cryp->caps->padding_wa)
+ /* Special case 1 */
+ return stm32_cryp_irq_write_gcm_padded_data(cryp);
+
+ /* Setting padding bytes (NBBLB) */
+ stm32_cryp_irq_set_npblb(cryp);
+ }
+
+ if (unlikely((cryp->total_in - cryp->authsize < AES_BLOCK_SIZE) &&
+ (stm32_cryp_get_hw_mode(cryp) == CR_AES_CCM) &&
+ is_decrypt(cryp))) {
+ /* Padding for AES CCM decryption */
+ if (cryp->caps->padding_wa)
+ /* Special case 2 */
+ return stm32_cryp_irq_write_ccm_padded_data(cryp);
+
+ /* Setting padding bytes (NBBLB) */
+ stm32_cryp_irq_set_npblb(cryp);
+ }
+
+ if (is_aes(cryp) && is_ctr(cryp))
+ stm32_cryp_check_ctr_counter(cryp);
+
+ stm32_cryp_irq_write_block(cryp);
+}
+
+static void stm32_cryp_irq_write_gcm_header(struct stm32_cryp *cryp)
+{
+ int err;
+ unsigned int i, j;
+ u32 cfg, *src;
+
+ src = sg_virt(cryp->in_sg) + _walked_in;
+
+ for (i = 0; i < AES_BLOCK_32; i++) {
+ stm32_cryp_write(cryp, CRYP_DIN, *src);
+
+ src = stm32_cryp_next_in(cryp, src, sizeof(u32));
+ cryp->total_in -= min_t(size_t, sizeof(u32), cryp->total_in);
+
+ /* Check if whole header written */
+ if ((cryp->total_in_save - cryp->total_in) ==
+ cryp->areq->assoclen) {
+ /* Write padding if needed */
+ for (j = i + 1; j < AES_BLOCK_32; j++)
+ stm32_cryp_write(cryp, CRYP_DIN, 0);
+
+ /* Wait for completion */
+ err = stm32_cryp_wait_busy(cryp);
+ if (err) {
+ dev_err(cryp->dev, "Timeout (gcm header)\n");
+ return stm32_cryp_finish_req(cryp, err);
+ }
+
+ if (stm32_cryp_get_input_text_len(cryp)) {
+ /* Phase 3 : payload */
+ cfg = stm32_cryp_read(cryp, CRYP_CR);
+ cfg &= ~CR_CRYPEN;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+
+ cfg &= ~CR_PH_MASK;
+ cfg |= CR_PH_PAYLOAD;
+ cfg |= CR_CRYPEN;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+ } else {
+ /* Phase 4 : tag */
+ stm32_cryp_write(cryp, CRYP_IMSCR, 0);
+ stm32_cryp_finish_req(cryp, 0);
+ }
+
+ break;
+ }
+
+ if (!cryp->total_in)
+ break;
+ }
+}
+
+static void stm32_cryp_irq_write_ccm_header(struct stm32_cryp *cryp)
+{
+ int err;
+ unsigned int i = 0, j, k;
+ u32 alen, cfg, *src;
+ u8 d8[4];
+
+ src = sg_virt(cryp->in_sg) + _walked_in;
+ alen = cryp->areq->assoclen;
+
+ if (!_walked_in) {
+ if (cryp->areq->assoclen <= 65280) {
+ /* Write first u32 of B1 */
+ d8[0] = (alen >> 8) & 0xFF;
+ d8[1] = alen & 0xFF;
+ d8[2] = *((u8 *)src);
+ src = stm32_cryp_next_in(cryp, src, 1);
+ d8[3] = *((u8 *)src);
+ src = stm32_cryp_next_in(cryp, src, 1);
+
+ stm32_cryp_write(cryp, CRYP_DIN, *(u32 *)d8);
+ i++;
+
+ cryp->total_in -= min_t(size_t, 2, cryp->total_in);
+ } else {
+ /* Build the two first u32 of B1 */
+ d8[0] = 0xFF;
+ d8[1] = 0xFE;
+ d8[2] = alen & 0xFF000000;
+ d8[3] = alen & 0x00FF0000;
+
+ stm32_cryp_write(cryp, CRYP_DIN, *(u32 *)d8);
+ i++;
+
+ d8[0] = alen & 0x0000FF00;
+ d8[1] = alen & 0x000000FF;
+ d8[2] = *((u8 *)src);
+ src = stm32_cryp_next_in(cryp, src, 1);
+ d8[3] = *((u8 *)src);
+ src = stm32_cryp_next_in(cryp, src, 1);
+
+ stm32_cryp_write(cryp, CRYP_DIN, *(u32 *)d8);
+ i++;
+
+ cryp->total_in -= min_t(size_t, 2, cryp->total_in);
+ }
+ }
+
+ /* Write next u32 */
+ for (; i < AES_BLOCK_32; i++) {
+ /* Build an u32 */
+ memset(d8, 0, sizeof(u32));
+ for (k = 0; k < sizeof(u32); k++) {
+ d8[k] = *((u8 *)src);
+ src = stm32_cryp_next_in(cryp, src, 1);
+
+ cryp->total_in -= min_t(size_t, 1, cryp->total_in);
+ if ((cryp->total_in_save - cryp->total_in) == alen)
+ break;
+ }
+
+ stm32_cryp_write(cryp, CRYP_DIN, *(u32 *)d8);
+
+ if ((cryp->total_in_save - cryp->total_in) == alen) {
+ /* Write padding if needed */
+ for (j = i + 1; j < AES_BLOCK_32; j++)
+ stm32_cryp_write(cryp, CRYP_DIN, 0);
+
+ /* Wait for completion */
+ err = stm32_cryp_wait_busy(cryp);
+ if (err) {
+ dev_err(cryp->dev, "Timeout (ccm header)\n");
+ return stm32_cryp_finish_req(cryp, err);
+ }
+
+ if (stm32_cryp_get_input_text_len(cryp)) {
+ /* Phase 3 : payload */
+ cfg = stm32_cryp_read(cryp, CRYP_CR);
+ cfg &= ~CR_CRYPEN;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+
+ cfg &= ~CR_PH_MASK;
+ cfg |= CR_PH_PAYLOAD;
+ cfg |= CR_CRYPEN;
+ stm32_cryp_write(cryp, CRYP_CR, cfg);
+ } else {
+ /* Phase 4 : tag */
+ stm32_cryp_write(cryp, CRYP_IMSCR, 0);
+ stm32_cryp_finish_req(cryp, 0);
+ }
+
+ break;
+ }
+ }
+}
+
+static irqreturn_t stm32_cryp_irq_thread(int irq, void *arg)
+{
+ struct stm32_cryp *cryp = arg;
+ u32 ph;
+
+ if (cryp->irq_status & MISR_OUT)
+ /* Output FIFO IRQ: read data */
+ if (unlikely(stm32_cryp_irq_read_data(cryp))) {
+ /* All bytes processed, finish */
+ stm32_cryp_write(cryp, CRYP_IMSCR, 0);
+ stm32_cryp_finish_req(cryp, 0);
+ return IRQ_HANDLED;
+ }
+
+ if (cryp->irq_status & MISR_IN) {
+ if (is_gcm(cryp)) {
+ ph = stm32_cryp_read(cryp, CRYP_CR) & CR_PH_MASK;
+ if (unlikely(ph == CR_PH_HEADER))
+ /* Write Header */
+ stm32_cryp_irq_write_gcm_header(cryp);
+ else
+ /* Input FIFO IRQ: write data */
+ stm32_cryp_irq_write_data(cryp);
+ cryp->gcm_ctr++;
+ } else if (is_ccm(cryp)) {
+ ph = stm32_cryp_read(cryp, CRYP_CR) & CR_PH_MASK;
+ if (unlikely(ph == CR_PH_HEADER))
+ /* Write Header */
+ stm32_cryp_irq_write_ccm_header(cryp);
+ else
+ /* Input FIFO IRQ: write data */
+ stm32_cryp_irq_write_data(cryp);
+ } else {
+ /* Input FIFO IRQ: write data */
+ stm32_cryp_irq_write_data(cryp);
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t stm32_cryp_irq(int irq, void *arg)
+{
+ struct stm32_cryp *cryp = arg;
+
+ cryp->irq_status = stm32_cryp_read(cryp, CRYP_MISR);
+
+ return IRQ_WAKE_THREAD;
+}
+
+static struct crypto_alg crypto_algs[] = {
+{
+ .cra_name = "ecb(aes)",
+ .cra_driver_name = "stm32-ecb-aes",
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct stm32_cryp_ctx),
+ .cra_alignmask = 0xf,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = stm32_cryp_cra_init,
+ .cra_ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = stm32_cryp_aes_setkey,
+ .encrypt = stm32_cryp_aes_ecb_encrypt,
+ .decrypt = stm32_cryp_aes_ecb_decrypt,
+ }
+},
+{
+ .cra_name = "cbc(aes)",
+ .cra_driver_name = "stm32-cbc-aes",
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct stm32_cryp_ctx),
+ .cra_alignmask = 0xf,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = stm32_cryp_cra_init,
+ .cra_ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = stm32_cryp_aes_setkey,
+ .encrypt = stm32_cryp_aes_cbc_encrypt,
+ .decrypt = stm32_cryp_aes_cbc_decrypt,
+ }
+},
+{
+ .cra_name = "ctr(aes)",
+ .cra_driver_name = "stm32-ctr-aes",
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct stm32_cryp_ctx),
+ .cra_alignmask = 0xf,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = stm32_cryp_cra_init,
+ .cra_ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = stm32_cryp_aes_setkey,
+ .encrypt = stm32_cryp_aes_ctr_encrypt,
+ .decrypt = stm32_cryp_aes_ctr_decrypt,
+ }
+},
+{
+ .cra_name = "ecb(des)",
+ .cra_driver_name = "stm32-ecb-des",
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = DES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct stm32_cryp_ctx),
+ .cra_alignmask = 0xf,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = stm32_cryp_cra_init,
+ .cra_ablkcipher = {
+ .min_keysize = DES_BLOCK_SIZE,
+ .max_keysize = DES_BLOCK_SIZE,
+ .setkey = stm32_cryp_des_setkey,
+ .encrypt = stm32_cryp_des_ecb_encrypt,
+ .decrypt = stm32_cryp_des_ecb_decrypt,
+ }
+},
+{
+ .cra_name = "cbc(des)",
+ .cra_driver_name = "stm32-cbc-des",
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = DES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct stm32_cryp_ctx),
+ .cra_alignmask = 0xf,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = stm32_cryp_cra_init,
+ .cra_ablkcipher = {
+ .min_keysize = DES_BLOCK_SIZE,
+ .max_keysize = DES_BLOCK_SIZE,
+ .ivsize = DES_BLOCK_SIZE,
+ .setkey = stm32_cryp_des_setkey,
+ .encrypt = stm32_cryp_des_cbc_encrypt,
+ .decrypt = stm32_cryp_des_cbc_decrypt,
+ }
+},
+{
+ .cra_name = "ecb(des3_ede)",
+ .cra_driver_name = "stm32-ecb-des3",
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = DES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct stm32_cryp_ctx),
+ .cra_alignmask = 0xf,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = stm32_cryp_cra_init,
+ .cra_ablkcipher = {
+ .min_keysize = 3 * DES_BLOCK_SIZE,
+ .max_keysize = 3 * DES_BLOCK_SIZE,
+ .setkey = stm32_cryp_tdes_setkey,
+ .encrypt = stm32_cryp_tdes_ecb_encrypt,
+ .decrypt = stm32_cryp_tdes_ecb_decrypt,
+ }
+},
+{
+ .cra_name = "cbc(des3_ede)",
+ .cra_driver_name = "stm32-cbc-des3",
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC,
+ .cra_blocksize = DES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct stm32_cryp_ctx),
+ .cra_alignmask = 0xf,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = stm32_cryp_cra_init,
+ .cra_ablkcipher = {
+ .min_keysize = 3 * DES_BLOCK_SIZE,
+ .max_keysize = 3 * DES_BLOCK_SIZE,
+ .ivsize = DES_BLOCK_SIZE,
+ .setkey = stm32_cryp_tdes_setkey,
+ .encrypt = stm32_cryp_tdes_cbc_encrypt,
+ .decrypt = stm32_cryp_tdes_cbc_decrypt,
+ }
+},
+};
+
+static struct aead_alg aead_algs[] = {
+{
+ .setkey = stm32_cryp_aes_aead_setkey,
+ .setauthsize = stm32_cryp_aes_gcm_setauthsize,
+ .encrypt = stm32_cryp_aes_gcm_encrypt,
+ .decrypt = stm32_cryp_aes_gcm_decrypt,
+ .init = stm32_cryp_aes_aead_init,
+ .ivsize = 12,
+ .maxauthsize = AES_BLOCK_SIZE,
+
+ .base = {
+ .cra_name = "gcm(aes)",
+ .cra_driver_name = "stm32-gcm-aes",
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_ASYNC,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct stm32_cryp_ctx),
+ .cra_alignmask = 0xf,
+ .cra_module = THIS_MODULE,
+ },
+},
+{
+ .setkey = stm32_cryp_aes_aead_setkey,
+ .setauthsize = stm32_cryp_aes_ccm_setauthsize,
+ .encrypt = stm32_cryp_aes_ccm_encrypt,
+ .decrypt = stm32_cryp_aes_ccm_decrypt,
+ .init = stm32_cryp_aes_aead_init,
+ .ivsize = AES_BLOCK_SIZE,
+ .maxauthsize = AES_BLOCK_SIZE,
+
+ .base = {
+ .cra_name = "ccm(aes)",
+ .cra_driver_name = "stm32-ccm-aes",
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_ASYNC,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct stm32_cryp_ctx),
+ .cra_alignmask = 0xf,
+ .cra_module = THIS_MODULE,
+ },
+},
+};
+
+static const struct stm32_cryp_caps f7_data = {
+ .swap_final = true,
+ .padding_wa = true,
+};
+
+static const struct stm32_cryp_caps mp1_data = {
+ .swap_final = false,
+ .padding_wa = false,
+};
+
+static const struct of_device_id stm32_dt_ids[] = {
+ { .compatible = "st,stm32f756-cryp", .data = &f7_data},
+ { .compatible = "st,stm32mp1-cryp", .data = &mp1_data},
+ {},
+};
+MODULE_DEVICE_TABLE(of, stm32_dt_ids);
+
+static int stm32_cryp_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct stm32_cryp *cryp;
+ struct resource *res;
+ struct reset_control *rst;
+ int irq, ret;
+
+ cryp = devm_kzalloc(dev, sizeof(*cryp), GFP_KERNEL);
+ if (!cryp)
+ return -ENOMEM;
+
+ cryp->caps = of_device_get_match_data(dev);
+ if (!cryp->caps)
+ return -ENODEV;
+
+ cryp->dev = dev;
+
+ mutex_init(&cryp->lock);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ cryp->regs = devm_ioremap_resource(dev, res);
+ if (IS_ERR(cryp->regs))
+ return PTR_ERR(cryp->regs);
+
+ 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_cryp_irq,
+ stm32_cryp_irq_thread, IRQF_ONESHOT,
+ dev_name(dev), cryp);
+ if (ret) {
+ dev_err(dev, "Cannot grab IRQ\n");
+ return ret;
+ }
+
+ cryp->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(cryp->clk)) {
+ dev_err(dev, "Could not get clock\n");
+ return PTR_ERR(cryp->clk);
+ }
+
+ ret = clk_prepare_enable(cryp->clk);
+ if (ret) {
+ dev_err(cryp->dev, "Failed to enable clock\n");
+ return ret;
+ }
+
+ pm_runtime_set_autosuspend_delay(dev, CRYP_AUTOSUSPEND_DELAY);
+ pm_runtime_use_autosuspend(dev);
+
+ pm_runtime_get_noresume(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
+ rst = devm_reset_control_get(dev, NULL);
+ if (!IS_ERR(rst)) {
+ reset_control_assert(rst);
+ udelay(2);
+ reset_control_deassert(rst);
+ }
+
+ platform_set_drvdata(pdev, cryp);
+
+ spin_lock(&cryp_list.lock);
+ list_add(&cryp->list, &cryp_list.dev_list);
+ spin_unlock(&cryp_list.lock);
+
+ /* Initialize crypto engine */
+ cryp->engine = crypto_engine_alloc_init(dev, 1);
+ if (!cryp->engine) {
+ dev_err(dev, "Could not init crypto engine\n");
+ ret = -ENOMEM;
+ goto err_engine1;
+ }
+
+ ret = crypto_engine_start(cryp->engine);
+ if (ret) {
+ dev_err(dev, "Could not start crypto engine\n");
+ goto err_engine2;
+ }
+
+ ret = crypto_register_algs(crypto_algs, ARRAY_SIZE(crypto_algs));
+ if (ret) {
+ dev_err(dev, "Could not register algs\n");
+ goto err_algs;
+ }
+
+ ret = crypto_register_aeads(aead_algs, ARRAY_SIZE(aead_algs));
+ if (ret)
+ goto err_aead_algs;
+
+ dev_info(dev, "Initialized\n");
+
+ pm_runtime_put_sync(dev);
+
+ return 0;
+
+err_aead_algs:
+ crypto_unregister_algs(crypto_algs, ARRAY_SIZE(crypto_algs));
+err_algs:
+err_engine2:
+ crypto_engine_exit(cryp->engine);
+err_engine1:
+ spin_lock(&cryp_list.lock);
+ list_del(&cryp->list);
+ spin_unlock(&cryp_list.lock);
+
+ pm_runtime_disable(dev);
+ pm_runtime_put_noidle(dev);
+ pm_runtime_disable(dev);
+ pm_runtime_put_noidle(dev);
+
+ clk_disable_unprepare(cryp->clk);
+
+ return ret;
+}
+
+static int stm32_cryp_remove(struct platform_device *pdev)
+{
+ struct stm32_cryp *cryp = platform_get_drvdata(pdev);
+ int ret;
+
+ if (!cryp)
+ return -ENODEV;
+
+ ret = pm_runtime_get_sync(cryp->dev);
+ if (ret < 0)
+ return ret;
+
+ crypto_unregister_aeads(aead_algs, ARRAY_SIZE(aead_algs));
+ crypto_unregister_algs(crypto_algs, ARRAY_SIZE(crypto_algs));
+
+ crypto_engine_exit(cryp->engine);
+
+ spin_lock(&cryp_list.lock);
+ list_del(&cryp->list);
+ spin_unlock(&cryp_list.lock);
+
+ pm_runtime_disable(cryp->dev);
+ pm_runtime_put_noidle(cryp->dev);
+
+ clk_disable_unprepare(cryp->clk);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int stm32_cryp_runtime_suspend(struct device *dev)
+{
+ struct stm32_cryp *cryp = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(cryp->clk);
+
+ return 0;
+}
+
+static int stm32_cryp_runtime_resume(struct device *dev)
+{
+ struct stm32_cryp *cryp = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(cryp->clk);
+ if (ret) {
+ dev_err(cryp->dev, "Failed to prepare_enable clock\n");
+ return ret;
+ }
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops stm32_cryp_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(stm32_cryp_runtime_suspend,
+ stm32_cryp_runtime_resume, NULL)
+};
+
+static struct platform_driver stm32_cryp_driver = {
+ .probe = stm32_cryp_probe,
+ .remove = stm32_cryp_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ .pm = &stm32_cryp_pm_ops,
+ .of_match_table = stm32_dt_ids,
+ },
+};
+
+module_platform_driver(stm32_cryp_driver);
+
+MODULE_AUTHOR("Fabien Dessenne <fabien.dessenne@st.com>");
+MODULE_DESCRIPTION("STMicrolectronics STM32 CRYP hardware driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c
new file mode 100644
index 0000000..590d735
--- /dev/null
+++ b/drivers/crypto/stm32/stm32-hash.c
@@ -0,0 +1,1643 @@
+/*
+ * This file is part of STM32 Crypto driver for Linux.
+ *
+ * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
+ * Author(s): Lionel DEBIEVE <lionel.debieve@st.com> 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/pm_runtime.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
+
+#define HASH_AUTOSUSPEND_DELAY 50
+
+struct stm32_hash_ctx {
+ struct crypto_engine_ctx enginectx;
+ 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 = 0;
+ unsigned int i;
+ u32 *buffer = (void *)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);
+
+ if (ncp) {
+ memset(buffer + ncp, 0,
+ DIV_ROUND_UP(ncp, sizeof(u32)) - ncp);
+ writesl(hdev->io_base + HASH_DIN, buffer,
+ DIV_ROUND_UP(ncp, sizeof(u32)));
+ }
+ 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;
+ int buflen = rctx->bufcnt;
+
+ rctx->bufcnt = 0;
+
+ if (!(rctx->flags & HASH_FLAGS_CPU))
+ err = stm32_hash_dma_send(hdev);
+ else
+ err = stm32_hash_xmit_cpu(hdev, rctx->buffer, buflen, 1);
+
+
+ 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;
+ }
+
+ pm_runtime_mark_last_busy(hdev->dev);
+ pm_runtime_put_autosuspend(hdev->dev);
+
+ 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)
+{
+ pm_runtime_get_sync(hdev->dev);
+
+ 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_one_request(struct crypto_engine *engine, void *areq);
+static int stm32_hash_prepare_req(struct crypto_engine *engine, void *areq);
+
+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, void *areq)
+{
+ struct ahash_request *req = container_of(areq, struct ahash_request,
+ base);
+ 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, void *areq)
+{
+ struct ahash_request *req = container_of(areq, struct ahash_request,
+ base);
+ 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);
+
+ 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;
+ }
+
+ return stm32_hash_enqueue(req, HASH_OP_UPDATE);
+}
+
+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;
+
+ pm_runtime_get_sync(hdev->dev);
+
+ while (!(stm32_hash_read(hdev, HASH_SR) & HASH_SR_DATA_INPUT_READY))
+ cpu_relax();
+
+ rctx->hw_context = kmalloc_array(3 + HASH_CSR_REGISTER_NUMBER,
+ sizeof(u32),
+ 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));
+
+ pm_runtime_mark_last_busy(hdev->dev);
+ pm_runtime_put_autosuspend(hdev->dev);
+
+ 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;
+
+ pm_runtime_get_sync(hdev->dev);
+
+ 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++);
+
+ pm_runtime_mark_last_busy(hdev->dev);
+ pm_runtime_put_autosuspend(hdev->dev);
+
+ 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;
+
+ ctx->enginectx.op.do_one_request = stm32_hash_one_request;
+ ctx->enginectx.op.prepare_request = stm32_hash_prepare_req;
+ ctx->enginectx.op.unprepare_request = NULL;
+ 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;
+
+ 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, 0);
+
+ 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;
+ /* Disable IT*/
+ stm32_hash_write(hdev, HASH_IMR, 0);
+ 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_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_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_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_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_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_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_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_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)
+{
+ hdev->pdata = of_device_get_match_data(dev);
+ if (!hdev->pdata) {
+ dev_err(dev, "no compatible OF match\n");
+ return -EINVAL;
+ }
+
+ if (of_property_read_u32(dev->of_node, "dma-maxburst",
+ &hdev->dma_maxburst)) {
+ dev_info(dev, "dma-maxburst not specified, using 0\n");
+ hdev->dma_maxburst = 0;
+ }
+
+ return 0;
+}
+
+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;
+ }
+
+ pm_runtime_set_autosuspend_delay(dev, HASH_AUTOSUSPEND_DELAY);
+ pm_runtime_use_autosuspend(dev);
+
+ pm_runtime_get_noresume(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
+ 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;
+ }
+
+ 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);
+
+ pm_runtime_put_sync(dev);
+
+ 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);
+
+ pm_runtime_disable(dev);
+ pm_runtime_put_noidle(dev);
+
+ clk_disable_unprepare(hdev->clk);
+
+ return ret;
+}
+
+static int stm32_hash_remove(struct platform_device *pdev)
+{
+ static struct stm32_hash_dev *hdev;
+ int ret;
+
+ hdev = platform_get_drvdata(pdev);
+ if (!hdev)
+ return -ENODEV;
+
+ ret = pm_runtime_get_sync(hdev->dev);
+ if (ret < 0)
+ return ret;
+
+ 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);
+
+ pm_runtime_disable(hdev->dev);
+ pm_runtime_put_noidle(hdev->dev);
+
+ clk_disable_unprepare(hdev->clk);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int stm32_hash_runtime_suspend(struct device *dev)
+{
+ struct stm32_hash_dev *hdev = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(hdev->clk);
+
+ return 0;
+}
+
+static int stm32_hash_runtime_resume(struct device *dev)
+{
+ struct stm32_hash_dev *hdev = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(hdev->clk);
+ if (ret) {
+ dev_err(hdev->dev, "Failed to prepare_enable clock\n");
+ return ret;
+ }
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops stm32_hash_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(stm32_hash_runtime_suspend,
+ stm32_hash_runtime_resume, NULL)
+};
+
+static struct platform_driver stm32_hash_driver = {
+ .probe = stm32_hash_probe,
+ .remove = stm32_hash_remove,
+ .driver = {
+ .name = "stm32-hash",
+ .pm = &stm32_hash_pm_ops,
+ .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@st.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/crypto/stm32/stm32_crc32.c b/drivers/crypto/stm32/stm32_crc32.c
new file mode 100644
index 0000000..29d2095
--- /dev/null
+++ b/drivers/crypto/stm32/stm32_crc32.c
@@ -0,0 +1,387 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2017
+ * Author: Fabien Dessenne <fabien.dessenne@st.com>
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#include <linux/bitrev.h>
+#include <linux/clk.h>
+#include <linux/crc32poly.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include <crypto/internal/hash.h>
+
+#include <asm/unaligned.h>
+
+#define DRIVER_NAME "stm32-crc32"
+#define CHKSUM_DIGEST_SIZE 4
+#define CHKSUM_BLOCK_SIZE 1
+
+/* Registers */
+#define CRC_DR 0x00000000
+#define CRC_CR 0x00000008
+#define CRC_INIT 0x00000010
+#define CRC_POL 0x00000014
+
+/* Registers values */
+#define CRC_CR_RESET BIT(0)
+#define CRC_CR_REVERSE (BIT(7) | BIT(6) | BIT(5))
+#define CRC_INIT_DEFAULT 0xFFFFFFFF
+
+#define CRC_AUTOSUSPEND_DELAY 50
+
+struct stm32_crc {
+ struct list_head list;
+ struct device *dev;
+ void __iomem *regs;
+ struct clk *clk;
+ u8 pending_data[sizeof(u32)];
+ size_t nb_pending_bytes;
+};
+
+struct stm32_crc_list {
+ struct list_head dev_list;
+ spinlock_t lock; /* protect dev_list */
+};
+
+static struct stm32_crc_list crc_list = {
+ .dev_list = LIST_HEAD_INIT(crc_list.dev_list),
+ .lock = __SPIN_LOCK_UNLOCKED(crc_list.lock),
+};
+
+struct stm32_crc_ctx {
+ u32 key;
+ u32 poly;
+};
+
+struct stm32_crc_desc_ctx {
+ u32 partial; /* crc32c: partial in first 4 bytes of that struct */
+ struct stm32_crc *crc;
+};
+
+static int stm32_crc32_cra_init(struct crypto_tfm *tfm)
+{
+ struct stm32_crc_ctx *mctx = crypto_tfm_ctx(tfm);
+
+ mctx->key = CRC_INIT_DEFAULT;
+ mctx->poly = CRC32_POLY_LE;
+ return 0;
+}
+
+static int stm32_crc32c_cra_init(struct crypto_tfm *tfm)
+{
+ struct stm32_crc_ctx *mctx = crypto_tfm_ctx(tfm);
+
+ mctx->key = CRC_INIT_DEFAULT;
+ mctx->poly = CRC32C_POLY_LE;
+ return 0;
+}
+
+static int stm32_crc_setkey(struct crypto_shash *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct stm32_crc_ctx *mctx = crypto_shash_ctx(tfm);
+
+ if (keylen != sizeof(u32)) {
+ crypto_shash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+ return -EINVAL;
+ }
+
+ mctx->key = get_unaligned_le32(key);
+ return 0;
+}
+
+static int stm32_crc_init(struct shash_desc *desc)
+{
+ struct stm32_crc_desc_ctx *ctx = shash_desc_ctx(desc);
+ struct stm32_crc_ctx *mctx = crypto_shash_ctx(desc->tfm);
+ struct stm32_crc *crc;
+
+ spin_lock_bh(&crc_list.lock);
+ list_for_each_entry(crc, &crc_list.dev_list, list) {
+ ctx->crc = crc;
+ break;
+ }
+ spin_unlock_bh(&crc_list.lock);
+
+ pm_runtime_get_sync(ctx->crc->dev);
+
+ /* Reset, set key, poly and configure in bit reverse mode */
+ writel_relaxed(bitrev32(mctx->key), ctx->crc->regs + CRC_INIT);
+ writel_relaxed(bitrev32(mctx->poly), ctx->crc->regs + CRC_POL);
+ writel_relaxed(CRC_CR_RESET | CRC_CR_REVERSE, ctx->crc->regs + CRC_CR);
+
+ /* Store partial result */
+ ctx->partial = readl_relaxed(ctx->crc->regs + CRC_DR);
+ ctx->crc->nb_pending_bytes = 0;
+
+ pm_runtime_mark_last_busy(ctx->crc->dev);
+ pm_runtime_put_autosuspend(ctx->crc->dev);
+
+ return 0;
+}
+
+static int stm32_crc_update(struct shash_desc *desc, const u8 *d8,
+ unsigned int length)
+{
+ struct stm32_crc_desc_ctx *ctx = shash_desc_ctx(desc);
+ struct stm32_crc *crc = ctx->crc;
+ u32 *d32;
+ unsigned int i;
+
+ pm_runtime_get_sync(crc->dev);
+
+ if (unlikely(crc->nb_pending_bytes)) {
+ while (crc->nb_pending_bytes != sizeof(u32) && length) {
+ /* Fill in pending data */
+ crc->pending_data[crc->nb_pending_bytes++] = *(d8++);
+ length--;
+ }
+
+ if (crc->nb_pending_bytes == sizeof(u32)) {
+ /* Process completed pending data */
+ writel_relaxed(*(u32 *)crc->pending_data,
+ crc->regs + CRC_DR);
+ crc->nb_pending_bytes = 0;
+ }
+ }
+
+ d32 = (u32 *)d8;
+ for (i = 0; i < length >> 2; i++)
+ /* Process 32 bits data */
+ writel_relaxed(*(d32++), crc->regs + CRC_DR);
+
+ /* Store partial result */
+ ctx->partial = readl_relaxed(crc->regs + CRC_DR);
+
+ pm_runtime_mark_last_busy(crc->dev);
+ pm_runtime_put_autosuspend(crc->dev);
+
+ /* Check for pending data (non 32 bits) */
+ length &= 3;
+ if (likely(!length))
+ return 0;
+
+ if ((crc->nb_pending_bytes + length) >= sizeof(u32)) {
+ /* Shall not happen */
+ dev_err(crc->dev, "Pending data overflow\n");
+ return -EINVAL;
+ }
+
+ d8 = (const u8 *)d32;
+ for (i = 0; i < length; i++)
+ /* Store pending data */
+ crc->pending_data[crc->nb_pending_bytes++] = *(d8++);
+
+ return 0;
+}
+
+static int stm32_crc_final(struct shash_desc *desc, u8 *out)
+{
+ struct stm32_crc_desc_ctx *ctx = shash_desc_ctx(desc);
+ struct stm32_crc_ctx *mctx = crypto_shash_ctx(desc->tfm);
+
+ /* Send computed CRC */
+ put_unaligned_le32(mctx->poly == CRC32C_POLY_LE ?
+ ~ctx->partial : ctx->partial, out);
+
+ return 0;
+}
+
+static int stm32_crc_finup(struct shash_desc *desc, const u8 *data,
+ unsigned int length, u8 *out)
+{
+ return stm32_crc_update(desc, data, length) ?:
+ stm32_crc_final(desc, out);
+}
+
+static int stm32_crc_digest(struct shash_desc *desc, const u8 *data,
+ unsigned int length, u8 *out)
+{
+ return stm32_crc_init(desc) ?: stm32_crc_finup(desc, data, length, out);
+}
+
+static struct shash_alg algs[] = {
+ /* CRC-32 */
+ {
+ .setkey = stm32_crc_setkey,
+ .init = stm32_crc_init,
+ .update = stm32_crc_update,
+ .final = stm32_crc_final,
+ .finup = stm32_crc_finup,
+ .digest = stm32_crc_digest,
+ .descsize = sizeof(struct stm32_crc_desc_ctx),
+ .digestsize = CHKSUM_DIGEST_SIZE,
+ .base = {
+ .cra_name = "crc32",
+ .cra_driver_name = DRIVER_NAME,
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
+ .cra_blocksize = CHKSUM_BLOCK_SIZE,
+ .cra_alignmask = 3,
+ .cra_ctxsize = sizeof(struct stm32_crc_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_init = stm32_crc32_cra_init,
+ }
+ },
+ /* CRC-32Castagnoli */
+ {
+ .setkey = stm32_crc_setkey,
+ .init = stm32_crc_init,
+ .update = stm32_crc_update,
+ .final = stm32_crc_final,
+ .finup = stm32_crc_finup,
+ .digest = stm32_crc_digest,
+ .descsize = sizeof(struct stm32_crc_desc_ctx),
+ .digestsize = CHKSUM_DIGEST_SIZE,
+ .base = {
+ .cra_name = "crc32c",
+ .cra_driver_name = DRIVER_NAME,
+ .cra_priority = 200,
+ .cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
+ .cra_blocksize = CHKSUM_BLOCK_SIZE,
+ .cra_alignmask = 3,
+ .cra_ctxsize = sizeof(struct stm32_crc_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_init = stm32_crc32c_cra_init,
+ }
+ }
+};
+
+static int stm32_crc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct stm32_crc *crc;
+ struct resource *res;
+ int ret;
+
+ crc = devm_kzalloc(dev, sizeof(*crc), GFP_KERNEL);
+ if (!crc)
+ return -ENOMEM;
+
+ crc->dev = dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ crc->regs = devm_ioremap_resource(dev, res);
+ if (IS_ERR(crc->regs)) {
+ dev_err(dev, "Cannot map CRC IO\n");
+ return PTR_ERR(crc->regs);
+ }
+
+ crc->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(crc->clk)) {
+ dev_err(dev, "Could not get clock\n");
+ return PTR_ERR(crc->clk);
+ }
+
+ ret = clk_prepare_enable(crc->clk);
+ if (ret) {
+ dev_err(crc->dev, "Failed to enable clock\n");
+ return ret;
+ }
+
+ pm_runtime_set_autosuspend_delay(dev, CRC_AUTOSUSPEND_DELAY);
+ pm_runtime_use_autosuspend(dev);
+
+ pm_runtime_get_noresume(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
+ platform_set_drvdata(pdev, crc);
+
+ spin_lock(&crc_list.lock);
+ list_add(&crc->list, &crc_list.dev_list);
+ spin_unlock(&crc_list.lock);
+
+ ret = crypto_register_shashes(algs, ARRAY_SIZE(algs));
+ if (ret) {
+ dev_err(dev, "Failed to register\n");
+ clk_disable_unprepare(crc->clk);
+ return ret;
+ }
+
+ dev_info(dev, "Initialized\n");
+
+ pm_runtime_put_sync(dev);
+
+ return 0;
+}
+
+static int stm32_crc_remove(struct platform_device *pdev)
+{
+ struct stm32_crc *crc = platform_get_drvdata(pdev);
+ int ret = pm_runtime_get_sync(crc->dev);
+
+ if (ret < 0)
+ return ret;
+
+ spin_lock(&crc_list.lock);
+ list_del(&crc->list);
+ spin_unlock(&crc_list.lock);
+
+ crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
+
+ pm_runtime_disable(crc->dev);
+ pm_runtime_put_noidle(crc->dev);
+
+ clk_disable_unprepare(crc->clk);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int stm32_crc_runtime_suspend(struct device *dev)
+{
+ struct stm32_crc *crc = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(crc->clk);
+
+ return 0;
+}
+
+static int stm32_crc_runtime_resume(struct device *dev)
+{
+ struct stm32_crc *crc = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(crc->clk);
+ if (ret) {
+ dev_err(crc->dev, "Failed to prepare_enable clock\n");
+ return ret;
+ }
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops stm32_crc_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(stm32_crc_runtime_suspend,
+ stm32_crc_runtime_resume, NULL)
+};
+
+static const struct of_device_id stm32_dt_ids[] = {
+ { .compatible = "st,stm32f7-crc", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, stm32_dt_ids);
+
+static struct platform_driver stm32_crc_driver = {
+ .probe = stm32_crc_probe,
+ .remove = stm32_crc_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ .pm = &stm32_crc_pm_ops,
+ .of_match_table = stm32_dt_ids,
+ },
+};
+
+module_platform_driver(stm32_crc_driver);
+
+MODULE_AUTHOR("Fabien Dessenne <fabien.dessenne@st.com>");
+MODULE_DESCRIPTION("STMicrolectronics STM32 CRC32 hardware driver");
+MODULE_LICENSE("GPL");