[PATCH 4/6] crypto: starfive - Add Public Key algo support

Jia Jie Ho
2022-11-30T05:55:34Z

Adding RSA enc/dec and sign/verify feature for
Starfive crypto driver.

Signed-off-by: Jia Jie Ho <jiajie.ho@starfivetech.com>
Signed-off-by: Huan Feng <huan.feng@starfivetech.com>
---
drivers/crypto/starfive/Makefile | 2 +-
drivers/crypto/starfive/starfive-cryp.c | 19 +-
drivers/crypto/starfive/starfive-pka.c | 683 ++++++++++++++++++++++++
drivers/crypto/starfive/starfive-regs.h | 65 +++
drivers/crypto/starfive/starfive-str.h | 35 ++
5 files changed, 802 insertions(+), 2 deletions(-)
create mode 100644 drivers/crypto/starfive/starfive-pka.c

diff --git a/drivers/crypto/starfive/Makefile b/drivers/crypto/starfive/Makefile
index 4958b1f6812c..d44e28063965 100644
--- a/drivers/crypto/starfive/Makefile
+++ b/drivers/crypto/starfive/Makefile
@@ -1,4 +1,4 @@
# SPDX-License-Identifier: GPL-2.0

obj-$(CONFIG_CRYPTO_DEV_STARFIVE) += starfive-crypto.o
-starfive-crypto-objs := starfive-cryp.o starfive-hash.o starfive-aes.o
+starfive-crypto-objs := starfive-cryp.o starfive-hash.o starfive-aes.o starfive-pka.o
diff --git a/drivers/crypto/starfive/starfive-cryp.c b/drivers/crypto/starfive/starfive-cryp.c
index 452bd1ab4f04..a9c7f39b5547 100644
--- a/drivers/crypto/starfive/starfive-cryp.c
+++ b/drivers/crypto/starfive/starfive-cryp.c
@@ -175,6 +175,12 @@ static int starfive_cryp_probe(struct platform_device *pdev)
goto err_aes_data;
}

+ sdev->pka_data = (void *)__get_free_pages(GFP_KERNEL | GFP_DMA32, pages);
+ if (!sdev->pka_data) {
+ dev_err(sdev->dev, "Can't allocate pka buffer pages when unaligned\n");
+ goto err_pka_data;
+ }
+
sdev->pages_count = pages >> 1;
sdev->data_buf_len = STARFIVE_MSG_BUFFER_SIZE >> 1;

@@ -197,10 +203,16 @@ static int starfive_cryp_probe(struct platform_device *pdev)
if (ret)
goto err_algs_aes;

+ ret = starfive_pka_register_algs();
+ if (ret)
+ goto err_algs_pka;
+
dev_info(dev, "Crypto engine started\n");

return 0;

+err_algs_pka:
+ starfive_aes_unregister_algs();
err_algs_aes:
starfive_hash_unregister_algs();
err_algs_hash:
@@ -208,6 +220,8 @@ static int starfive_cryp_probe(struct platform_device *pdev)
err_engine_start:
crypto_engine_exit(sdev->engine);
err_engine:
+ free_pages((unsigned long)sdev->pka_data, pages);
+err_pka_data:
free_pages((unsigned long)sdev->aes_data, pages);
err_aes_data:
free_pages((unsigned long)sdev->hash_data, pages);
@@ -230,6 +244,7 @@ static int starfive_cryp_remove(struct platform_device *pdev)

starfive_hash_unregister_algs();
starfive_aes_unregister_algs();
+ starfive_pka_unregister_algs();

crypto_engine_stop(sdev->engine);
crypto_engine_exit(sdev->engine);
@@ -238,8 +253,10 @@ static int starfive_cryp_remove(struct platform_device *pdev)

free_pages((unsigned long)sdev->hash_data, sdev->pages_count);
free_pages((unsigned long)sdev->aes_data, sdev->pages_count);
- sdev->hash_data = NULL;
+ free_pages((unsigned long)sdev->pka_data, sdev->pages_count);
sdev->aes_data = NULL;
+ sdev->hash_data = NULL;
+ sdev->pka_data = NULL;

spin_lock(&dev_list.lock);
list_del(&sdev->list);
diff --git a/drivers/crypto/starfive/starfive-pka.c b/drivers/crypto/starfive/starfive-pka.c
new file mode 100644
index 000000000000..e845f2545a9a
--- /dev/null
+++ b/drivers/crypto/starfive/starfive-pka.c
@@ -0,0 +1,683 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * StarFive Public Key Algo acceleration driver
+ *
+ * Copyright (c) 2022 StarFive Technology
+ */
+
+#include <linux/crypto.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-direct.h>
+#include <linux/interrupt.h>
+#include <linux/iopoll.h>
+#include <linux/io.h>
+#include <linux/mod_devicetable.h>
+
+#include <crypto/scatterwalk.h>
+
+#include "starfive-str.h"
+
+#define STARFIVE_RSA_KEYSZ_LEN (2048 >> 2)
+#define STARFIVE_RSA_KEY_SIZE (STARFIVE_RSA_KEYSZ_LEN * 3)
+#define STARFIVE_RSA_MAX_KEYSZ 256
+
+static inline int starfive_pka_wait_done(struct starfive_sec_ctx *ctx)
+{
+ struct starfive_sec_dev *sdev = ctx->sdev;
+ u32 status;
+
+ return readl_relaxed_poll_timeout(sdev->io_base + STARFIVE_PKA_CASR_OFFSET, status,
+ (status & STARFIVE_PKA_DONE_FLAGS), 10, 100000);
+}
+
+static void starfive_rsa_free_key(struct starfive_rsa_key *key)
+{
+ if (key->d)
+ kfree_sensitive(key->d);
+ if (key->e)
+ kfree_sensitive(key->e);
+ if (key->n)
+ kfree_sensitive(key->n);
+ memset(key, 0, sizeof(*key));
+}
+
+static unsigned int starfive_rsa_get_nbit(u8 *pa, u32 snum, int key_sz)
+{
+ u32 i;
+ u8 value;
+
+ i = snum >> 3;
+
+ value = pa[key_sz - i - 1];
+ value >>= snum & 0x7;
+ value &= 0x1;
+
+ return value;
+}
+
+static int starfive_rsa_domain_transfer(struct starfive_sec_ctx *ctx,
+ u32 *result, u32 *opa, u8 domain,
+ u32 *mod, int bit_len)
+{
+ struct starfive_sec_dev *sdev = ctx->sdev;
+ struct starfive_sec_request_ctx *rctx = ctx->rctx;
+ unsigned int *info;
+ int loop;
+ u8 opsize;
+ u32 temp;
+
+ opsize = (bit_len - 1) >> 5;
+ rctx->csr.pka.v = 0;
+ starfive_sec_write(sdev, STARFIVE_PKA_CACR_OFFSET, rctx->csr.pka.v);
+
+ info = (unsigned int *)mod;
+ for (loop = 0; loop <= opsize; loop++)
+ starfive_sec_write(sdev, STARFIVE_PKA_CANR_OFFSET + loop * 4, info[opsize - loop]);
+
+ if (domain != 0) {
+ rctx->csr.pka.v = 0;
+ rctx->csr.pka.cln_done = 1;
+ rctx->csr.pka.opsize = opsize;
+ rctx->csr.pka.exposize = opsize;
+ rctx->csr.pka.cmd = CRYPTO_CMD_PRE;
+ rctx->csr.pka.start = 1;
+ rctx->csr.pka.not_r2 = 1;
+ starfive_sec_write(sdev, STARFIVE_PKA_CACR_OFFSET, rctx->csr.pka.v);
+
+ starfive_pka_wait_done(ctx);
+
+ info = (unsigned int *)opa;
+ for (loop = 0; loop <= opsize; loop++)
+ starfive_sec_write(sdev, STARFIVE_PKA_CAAR_OFFSET + loop * 4,
+ info[opsize - loop]);
+
+ starfive_sec_write(sdev, STARFIVE_PKA_CAER_OFFSET, 0x1000000);
+
+ for (loop = 1; loop <= opsize; loop++)
+ starfive_sec_write(sdev, STARFIVE_PKA_CAER_OFFSET + loop * 4, 0);
+
+ rctx->csr.pka.v = 0;
+ rctx->csr.pka.cln_done = 1;
+ rctx->csr.pka.opsize = opsize;
+ rctx->csr.pka.exposize = opsize;
+ rctx->csr.pka.cmd = CRYPTO_CMD_AERN;
+ rctx->csr.pka.start = 1;
+ starfive_sec_write(sdev, STARFIVE_PKA_CACR_OFFSET, rctx->csr.pka.v);
+
+ starfive_pka_wait_done(ctx);
+ } else {
+ rctx->csr.pka.v = 0;
+ rctx->csr.pka.cln_done = 1;
+ rctx->csr.pka.opsize = opsize;
+ rctx->csr.pka.exposize = opsize;
+ rctx->csr.pka.cmd = CRYPTO_CMD_PRE;
+ rctx->csr.pka.start = 1;
+ rctx->csr.pka.pre_expf = 1;
+ starfive_sec_write(sdev, STARFIVE_PKA_CACR_OFFSET, rctx->csr.pka.v);
+
+ starfive_pka_wait_done(ctx);
+
+ info = (unsigned int *)opa;
+ for (loop = 0; loop <= opsize; loop++)
+ starfive_sec_write(sdev, STARFIVE_PKA_CAER_OFFSET + loop * 4,
+ info[opsize - loop]);
+
+ rctx->csr.pka.v = 0;
+ rctx->csr.pka.cln_done = 1;
+ rctx->csr.pka.opsize = opsize;
+ rctx->csr.pka.exposize = opsize;
+ rctx->csr.pka.cmd = CRYPTO_CMD_ARN;
+ rctx->csr.pka.start = 1;
+ starfive_sec_write(sdev, STARFIVE_PKA_CACR_OFFSET, rctx->csr.pka.v);
+
+ starfive_pka_wait_done(ctx);
+ }
+
+ for (loop = 0; loop <= opsize; loop++) {
+ temp = starfive_sec_read(sdev, STARFIVE_PKA_CAAR_OFFSET + 0x4 * loop);
+ result[opsize - loop] = temp;
+ }
+
+ return 0;
+}
+
+static int starfive_rsa_cpu_powm(struct starfive_sec_ctx *ctx, u32 *result,
+ u8 *de, u32 *n, int key_sz)
+{
+ struct starfive_sec_dev *sdev = ctx->sdev;
+ struct starfive_sec_request_ctx *rctx = ctx->rctx;
+ struct starfive_rsa_key *key = &ctx->rsa_key;
+ u32 initial;
+ int opsize, mlen, bs, loop;
+ unsigned int *mta;
+
+ opsize = (key_sz - 1) >> 2;
+ initial = 1;
+
+ mta = kmalloc(key_sz, GFP_KERNEL);
+ if (!mta)
+ return -ENOMEM;
+
+ starfive_rsa_domain_transfer(ctx, mta, sdev->pka_data, 0, n, key_sz << 3);
+
+ for (loop = 0; loop <= opsize; loop++)
+ starfive_sec_write(sdev, STARFIVE_PKA_CANR_OFFSET + loop * 4,
+ n[opsize - loop]);
+
+ rctx->csr.pka.v = 0;
+ rctx->csr.pka.cln_done = 1;
+ rctx->csr.pka.opsize = opsize;
+ rctx->csr.pka.exposize = opsize;
+ rctx->csr.pka.cmd = CRYPTO_CMD_PRE;
+ rctx->csr.pka.not_r2 = 1;
+ rctx->csr.pka.start = 1;
+
+ starfive_sec_write(sdev, STARFIVE_PKA_CACR_OFFSET, rctx->csr.pka.v);
+
+ starfive_pka_wait_done(ctx);
+
+ for (loop = 0; loop <= opsize; loop++)
+ starfive_sec_write(sdev, STARFIVE_PKA_CAER_OFFSET + loop * 4,
+ mta[opsize - loop]);
+
+ for (loop = key->bitlen; loop > 0; loop--) {
+ if (initial) {
+ for (bs = 0; bs <= opsize; bs++)
+ result[bs] = mta[bs];
+
+ initial = 0;
+ } else {
+ mlen = starfive_rsa_get_nbit(de, loop - 1, key_sz);
+
+ rctx->csr.pka.v = 0;
+ rctx->csr.pka.cln_done = 1;
+ rctx->csr.pka.opsize = opsize;
+ rctx->csr.pka.exposize = opsize;
+ rctx->csr.pka.cmd = CRYPTO_CMD_AARN;
+ rctx->csr.pka.start = 1;
+
+ starfive_sec_write(sdev, STARFIVE_PKA_CACR_OFFSET, rctx->csr.pka.v);
+ starfive_pka_wait_done(ctx);
+
+ if (mlen) {
+ rctx->csr.pka.v = 0;
+ rctx->csr.pka.cln_done = 1;
+ rctx->csr.pka.opsize = opsize;
+ rctx->csr.pka.exposize = opsize;
+ rctx->csr.pka.cmd = CRYPTO_CMD_AERN;
+ rctx->csr.pka.start = 1;
+
+ starfive_sec_write(sdev, STARFIVE_PKA_CACR_OFFSET,
+ rctx->csr.pka.v);
+ starfive_pka_wait_done(ctx);
+ }
+ }
+ }
+
+ for (loop = 0; loop <= opsize; loop++) {
+ unsigned int temp;
+
+ temp = starfive_sec_read(sdev, STARFIVE_PKA_CAAR_OFFSET + 0x4 * loop);
+ result[opsize - loop] = temp;
+ }
+
+ kfree(mta);
+
+ return starfive_rsa_domain_transfer(ctx, result, result, 1, n, key_sz << 3);
+}
+
+static int starfive_rsa_powm(struct starfive_sec_ctx *ctx, u8 *result,
+ u8 *de, u8 *n, int key_sz)
+{
+ return starfive_rsa_cpu_powm(ctx, (u32 *)result, de, (u32 *)n, key_sz);
+}
+
+static int starfive_rsa_get_from_sg(struct starfive_sec_request_ctx *rctx,
+ size_t offset, size_t count, size_t data_offset)
+{
+ size_t of, ct, index;
+ struct scatterlist *sg = rctx->in_sg;
+
+ of = offset;
+ ct = count;
+
+ while (sg->length <= of) {
+ of -= sg->length;
+
+ if (!sg_is_last(sg)) {
+ sg = sg_next(sg);
+ continue;
+ } else {
+ return -EBADE;
+ }
+ }
+
+ index = data_offset;
+ while (ct > 0) {
+ if (sg->length - of >= ct) {
+ scatterwalk_map_and_copy(rctx->sdev->pka_data + index, sg,
+ of, ct, 0);
+ index = index + ct;
+ return index - data_offset;
+ }
+
+ scatterwalk_map_and_copy(rctx->sdev->pka_data + index,
+ sg, of, sg->length - of, 0);
+ index += sg->length - of;
+ ct = ct - (sg->length - of);
+
+ of = 0;
+
+ if (!sg_is_last(sg))
+ sg = sg_next(sg);
+ else
+ return -EBADE;
+ }
+
+ return index - data_offset;
+}
+
+static int starfive_rsa_enc_core(struct starfive_sec_ctx *ctx, int enc)
+{
+ struct starfive_sec_dev *sdev = ctx->sdev;
+ struct starfive_sec_request_ctx *rctx = ctx->rctx;
+ struct starfive_rsa_key *key = &ctx->rsa_key;
+ size_t data_len, total, count, data_offset;
+ int ret = 0;
+ unsigned int *info;
+ int loop;
+
+ rctx->csr.pka.v = 0;
+ rctx->csr.pka.reset = 1;
+ starfive_sec_write(sdev, STARFIVE_PKA_CACR_OFFSET, rctx->csr.pka.v);
+
+ if (starfive_pka_wait_done(ctx))
+ dev_dbg(sdev->dev, "this is debug for lophyel pka_casr = %x %s %s %d\n",
+ starfive_sec_read(sdev, STARFIVE_PKA_CASR_OFFSET),
+ __FILE__, __func__, __LINE__);
+
+ rctx->offset = 0;
+ total = 0;
+
+ while (total < rctx->total_in) {
+ count = min(sdev->data_buf_len, rctx->total_in);
+ count = min(count, key->key_sz);
+ memset(sdev->pka_data, 0, key->key_sz);
+ data_offset = key->key_sz - count;
+
+ data_len = starfive_rsa_get_from_sg(rctx, rctx->offset, count, data_offset);
+ if (data_len < 0)
+ return data_len;
+ if (data_len != count)
+ return -EINVAL;
+
+ if (enc) {
+ key->bitlen = key->e_bitlen;
+ ret = starfive_rsa_powm(ctx, sdev->pka_data + STARFIVE_RSA_KEYSZ_LEN,
+ key->e, key->n, key->key_sz);
+ } else {
+ key->bitlen = key->d_bitlen;
+ ret = starfive_rsa_powm(ctx, sdev->pka_data + STARFIVE_RSA_KEYSZ_LEN,
+ key->d, key->n, key->key_sz);
+ }
+
+ if (ret)
+ return ret;
+
+ info = (unsigned int *)(sdev->pka_data + STARFIVE_RSA_KEYSZ_LEN);
+ for (loop = 0; loop < key->key_sz >> 2; loop++)
+ dev_dbg(sdev->dev, "result[%d] = %x\n", loop, info[loop]);
+
+ sg_copy_buffer(rctx->out_sg, sg_nents(rctx->out_sg),
+ sdev->pka_data + STARFIVE_RSA_KEYSZ_LEN,
+ key->key_sz, rctx->offset, 0);
+
+ rctx->offset += data_len;
+ total += data_len;
+ }
+
+ return ret;
+}
+
+static int starfive_rsa_enc(struct akcipher_request *req)
+{
+ struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
+ struct starfive_sec_ctx *ctx = akcipher_tfm_ctx(tfm);
+ struct starfive_rsa_key *key = &ctx->rsa_key;
+ struct starfive_sec_request_ctx *rctx = akcipher_request_ctx(req);
+ int ret = 0;
+
+ if (key->key_sz > STARFIVE_RSA_MAX_KEYSZ) {
+ akcipher_request_set_tfm(req, ctx->fallback.akcipher);
+ ret = crypto_akcipher_encrypt(req);
+ akcipher_request_set_tfm(req, tfm);
+ return ret;
+ }
+
+ if (unlikely(!key->n || !key->e))
+ return -EINVAL;
+
+ if (req->dst_len < key->key_sz) {
+ req->dst_len = key->key_sz;
+ dev_err(ctx->sdev->dev, "Output buffer length less than parameter n\n");
+ return -EOVERFLOW;
+ }
+
+ mutex_lock(&ctx->sdev->lock);
+
+ rctx->in_sg = req->src;
+ rctx->out_sg = req->dst;
+ rctx->sdev = ctx->sdev;
+ ctx->rctx = rctx;
+ rctx->total_in = req->src_len;
+ rctx->total_out = req->dst_len;
+
+ ret = starfive_rsa_enc_core(ctx, 1);
+
+ mutex_unlock(&ctx->sdev->lock);
+
+ return ret;
+}
+
+static int starfive_rsa_dec(struct akcipher_request *req)
+{
+ struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
+ struct starfive_sec_ctx *ctx = akcipher_tfm_ctx(tfm);
+ struct starfive_rsa_key *key = &ctx->rsa_key;
+ struct starfive_sec_request_ctx *rctx = akcipher_request_ctx(req);
+ int ret = 0;
+
+ if (key->key_sz > STARFIVE_RSA_MAX_KEYSZ) {
+ akcipher_request_set_tfm(req, ctx->fallback.akcipher);
+ ret = crypto_akcipher_decrypt(req);
+ akcipher_request_set_tfm(req, tfm);
+ return ret;
+ }
+
+ if (unlikely(!key->n || !key->d))
+ return -EINVAL;
+
+ if (req->dst_len < key->key_sz) {
+ req->dst_len = key->key_sz;
+ dev_err(ctx->sdev->dev, "Output buffer length less than parameter n\n");
+ return -EOVERFLOW;
+ }
+
+ mutex_lock(&ctx->sdev->lock);
+
+ rctx->in_sg = req->src;
+ rctx->out_sg = req->dst;
+ rctx->sdev = ctx->sdev;
+ ctx->rctx = rctx;
+ rctx->total_in = req->src_len;
+ rctx->total_out = req->dst_len;
+
+ ret = starfive_rsa_enc_core(ctx, 0);
+
+ mutex_unlock(&ctx->sdev->lock);
+
+ return ret;
+}
+
+static unsigned long starfive_rsa_check_keysz(unsigned int len)
+{
+ unsigned int bitslen = len << 3;
+
+ if (bitslen & 0x1f)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int starfive_rsa_set_n(struct starfive_rsa_key *rsa_key,
+ const char *value, size_t vlen)
+{
+ const char *ptr = value;
+ int ret;
+
+ while (!*ptr && vlen) {
+ ptr++;
+ vlen--;
+ }
+ rsa_key->key_sz = vlen;
+
+ /* invalid key size provided */
+ ret = starfive_rsa_check_keysz(rsa_key->key_sz);
+ if (ret)
+ return ret;
+
+ ret = -ENOMEM;
+ rsa_key->n = kmemdup(ptr, rsa_key->key_sz, GFP_KERNEL);
+ if (!rsa_key->n)
+ goto err;
+
+ return 0;
+ err:
+ rsa_key->key_sz = 0;
+ rsa_key->n = NULL;
+ starfive_rsa_free_key(rsa_key);
+ return ret;
+}
+
+static int starfive_rsa_set_e(struct starfive_rsa_key *rsa_key,
+ const char *value, size_t vlen)
+{
+ const char *ptr = value;
+ unsigned char pt;
+ int loop;
+
+ while (!*ptr && vlen) {
+ ptr++;
+ vlen--;
+ }
+ pt = *ptr;
+
+ if (!rsa_key->key_sz || !vlen || vlen > rsa_key->key_sz) {
+ rsa_key->e = NULL;
+ return -EINVAL;
+ }
+
+ rsa_key->e = kzalloc(rsa_key->key_sz, GFP_KERNEL);
+ if (!rsa_key->e)
+ return -ENOMEM;
+
+ for (loop = 8; loop > 0; loop--) {
+ if (pt >> (loop - 1))
+ break;
+ }
+
+ rsa_key->e_bitlen = (vlen - 1) * 8 + loop;
+
+ memcpy(rsa_key->e + (rsa_key->key_sz - vlen), ptr, vlen);
+
+ return 0;
+}
+
+static int starfive_rsa_set_d(struct starfive_rsa_key *rsa_key,
+ const char *value, size_t vlen)
+{
+ const char *ptr = value;
+ unsigned char pt;
+ int loop;
+ int ret;
+
+ while (!*ptr && vlen) {
+ ptr++;
+ vlen--;
+ }
+ pt = *ptr;
+
+ ret = -EINVAL;
+ if (!rsa_key->key_sz || !vlen || vlen > rsa_key->key_sz)
+ goto err;
+
+ ret = -ENOMEM;
+ rsa_key->d = kzalloc(rsa_key->key_sz, GFP_KERNEL);
+ if (!rsa_key->d)
+ goto err;
+
+ for (loop = 8; loop > 0; loop--) {
+ pr_debug("this is debug for lophyel loop = %d pt >> (loop - 1) = %x value[%d] = %x %s %s %d\n",
+ loop, pt >> (loop - 1), loop, value[loop], __FILE__, __func__, __LINE__);
+ if (pt >> (loop - 1))
+ break;
+ }
+
+ rsa_key->d_bitlen = (vlen - 1) * 8 + loop;
+
+ memcpy(rsa_key->d + (rsa_key->key_sz - vlen), ptr, vlen);
+
+ return 0;
+ err:
+ rsa_key->d = NULL;
+ return ret;
+}
+
+static int starfive_rsa_setkey(struct crypto_akcipher *tfm, const void *key,
+ unsigned int keylen, bool private)
+{
+ struct starfive_sec_ctx *ctx = akcipher_tfm_ctx(tfm);
+ struct rsa_key raw_key = {NULL};
+ struct starfive_rsa_key *rsa_key = &ctx->rsa_key;
+ int ret;
+
+ starfive_rsa_free_key(rsa_key);
+
+ if (private)
+ ret = rsa_parse_priv_key(&raw_key, key, keylen);
+ else
+ ret = rsa_parse_pub_key(&raw_key, key, keylen);
+ if (ret < 0)
+ goto err;
+
+ ret = starfive_rsa_set_n(rsa_key, raw_key.n, raw_key.n_sz);
+ if (ret < 0)
+ return ret;
+
+ ret = starfive_rsa_set_e(rsa_key, raw_key.e, raw_key.e_sz);
+ if (ret < 0)
+ goto err;
+
+ if (private) {
+ ret = starfive_rsa_set_d(rsa_key, raw_key.d, raw_key.d_sz);
+ if (ret < 0)
+ goto err;
+ }
+
+ if (!rsa_key->n || !rsa_key->e) {
+ /* invalid key provided */
+ ret = -EINVAL;
+ goto err;
+ }
+ if (private && !rsa_key->d) {
+ /* invalid private key provided */
+ ret = -EINVAL;
+ goto err;
+ }
+
+ return 0;
+ err:
+ starfive_rsa_free_key(rsa_key);
+ return ret;
+}
+
+static int starfive_rsa_set_pub_key(struct crypto_akcipher *tfm, const void *key,
+ unsigned int keylen)
+{
+ struct starfive_sec_ctx *ctx = akcipher_tfm_ctx(tfm);
+ int ret;
+
+ ret = crypto_akcipher_set_pub_key(ctx->fallback.akcipher, key, keylen);
+ if (ret)
+ return ret;
+
+ return starfive_rsa_setkey(tfm, key, keylen, false);
+}
+
+static int starfive_rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key,
+ unsigned int keylen)
+{
+ struct starfive_sec_ctx *ctx = akcipher_tfm_ctx(tfm);
+ int ret;
+
+ ret = crypto_akcipher_set_priv_key(ctx->fallback.akcipher, key, keylen);
+ if (ret)
+ return ret;
+
+ return starfive_rsa_setkey(tfm, key, keylen, true);
+}
+
+static unsigned int starfive_rsa_max_size(struct crypto_akcipher *tfm)
+{
+ struct starfive_sec_ctx *ctx = akcipher_tfm_ctx(tfm);
+
+ /* For key sizes > 2Kb, use software tfm */
+ if (ctx->rsa_key.key_sz > STARFIVE_RSA_MAX_KEYSZ)
+ return crypto_akcipher_maxsize(ctx->fallback.akcipher);
+
+ return ctx->rsa_key.key_sz;
+}
+
+/* Per session pkc's driver context creation function */
+static int starfive_rsa_init_tfm(struct crypto_akcipher *tfm)
+{
+ struct starfive_sec_ctx *ctx = akcipher_tfm_ctx(tfm);
+
+ ctx->fallback.akcipher = crypto_alloc_akcipher("rsa-generic", 0, 0);
+ if (IS_ERR(ctx->fallback.akcipher))
+ return PTR_ERR(ctx->fallback.akcipher);
+
+ ctx->sdev = starfive_sec_find_dev(ctx);
+ if (!ctx->sdev) {
+ crypto_free_akcipher(ctx->fallback.akcipher);
+ return -ENODEV;
+ }
+
+ akcipher_set_reqsize(tfm, sizeof(struct starfive_sec_request_ctx));
+
+ return 0;
+}
+
+/* Per session pkc's driver context cleanup function */
+static void starfive_rsa_exit_tfm(struct crypto_akcipher *tfm)
+{
+ struct starfive_sec_ctx *ctx = akcipher_tfm_ctx(tfm);
+ struct starfive_rsa_key *key = (struct starfive_rsa_key *)&ctx->rsa_key;
+
+ crypto_free_akcipher(ctx->fallback.akcipher);
+ starfive_rsa_free_key(key);
+}
+
+static struct akcipher_alg starfive_rsa = {
+ .encrypt = starfive_rsa_enc,
+ .decrypt = starfive_rsa_dec,
+ .sign = starfive_rsa_dec,
+ .verify = starfive_rsa_enc,
+ .set_pub_key = starfive_rsa_set_pub_key,
+ .set_priv_key = starfive_rsa_set_priv_key,
+ .max_size = starfive_rsa_max_size,
+ .init = starfive_rsa_init_tfm,
+ .exit = starfive_rsa_exit_tfm,
+ .reqsize = sizeof(struct starfive_sec_request_ctx),
+ .base = {
+ .cra_name = "rsa",
+ .cra_driver_name = "starfive-rsa",
+ .cra_flags = CRYPTO_ALG_TYPE_AKCIPHER |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_NEED_FALLBACK,
+ .cra_priority = 3000,
+ .cra_module = THIS_MODULE,
+ .cra_ctxsize = sizeof(struct starfive_sec_ctx),
+ },
+};
+
+int starfive_pka_register_algs(void)
+{
+ return crypto_register_akcipher(&starfive_rsa);
+}
+
+void starfive_pka_unregister_algs(void)
+{
+ crypto_unregister_akcipher(&starfive_rsa);
+}
diff --git a/drivers/crypto/starfive/starfive-regs.h b/drivers/crypto/starfive/starfive-regs.h
index c53b0303fb66..af3967c37a12 100644
--- a/drivers/crypto/starfive/starfive-regs.h
+++ b/drivers/crypto/starfive/starfive-regs.h
@@ -11,6 +11,7 @@

#define STARFIVE_AES_REGS_OFFSET 0x100
#define STARFIVE_HASH_REGS_OFFSET 0x300
+#define STARFIVE_PKA_REGS_OFFSET 0x400

union starfive_alg_cr {
u32 v;
@@ -26,6 +27,70 @@ union starfive_alg_cr {
};
};

+#define STARFIVE_PKA_CACR_OFFSET (STARFIVE_PKA_REGS_OFFSET + 0x0)
+#define STARFIVE_PKA_CASR_OFFSET (STARFIVE_PKA_REGS_OFFSET + 0x4)
+#define STARFIVE_PKA_CAAR_OFFSET (STARFIVE_PKA_REGS_OFFSET + 0x8)
+#define STARFIVE_PKA_CAER_OFFSET (STARFIVE_PKA_REGS_OFFSET + 0x108)
+#define STARFIVE_PKA_CANR_OFFSET (STARFIVE_PKA_REGS_OFFSET + 0x208)
+#define STARFIVE_PKA_CAAFR_OFFSET (STARFIVE_PKA_REGS_OFFSET + 0x308)
+#define STARFIVE_PKA_CAEFR_OFFSET (STARFIVE_PKA_REGS_OFFSET + 0x30c)
+#define STARFIVE_PKA_CANFR_OFFSET (STARFIVE_PKA_REGS_OFFSET + 0x310)
+#define STARFIVE_FIFO_COUNTER_OFFSET (STARFIVE_PKA_REGS_OFFSET + 0x314)
+
+/* R^2 mod N and N0' */
+#define CRYPTO_CMD_PRE 0x0
+/* (A + A) mod N, ==> A */
+#define CRYPTO_CMD_AAN 0x1
+/* A ^ E mod N ==> A */
+#define CRYPTO_CMD_AMEN 0x2
+/* A + E mod N ==> A */
+#define CRYPTO_CMD_AAEN 0x3
+/* A - E mod N ==> A */
+#define CRYPTO_CMD_ADEN 0x4
+/* A * R mod N ==> A */
+#define CRYPTO_CMD_ARN 0x5
+/* A * E * R mod N ==> A */
+#define CRYPTO_CMD_AERN 0x6
+/* A * A * R mod N ==> A */
+#define CRYPTO_CMD_AARN 0x7
+/* ECC2P ==> A */
+#define CRYPTO_CMD_ECC2P 0x8
+/* ECCPQ ==> A */
+#define CRYPTO_CMD_ECCPQ 0x9
+
+union starfive_pka_cacr {
+ u32 v;
+ struct {
+ u32 start :1;
+ u32 reset :1;
+ u32 ie :1;
+ u32 rsvd_0 :1;
+ u32 fifo_mode :1;
+ u32 not_r2 :1;
+ u32 ecc_sub :1;
+ u32 pre_expf :1;
+ u32 cmd :4;
+ u32 rsvd_1 :1;
+ u32 ctrl_dummy :1;
+ u32 ctrl_false :1;
+ u32 cln_done :1;
+ u32 opsize :6;
+ u32 rsvd_2 :2;
+ u32 exposize :6;
+ u32 rsvd_3 :1;
+ u32 bigendian :1;
+ };
+};
+
+union starfive_pka_casr {
+ u32 v;
+ struct {
+#define STARFIVE_PKA_DONE_FLAGS BIT(0)
+ u32 done :1;
+ u32 rsvd_0 :31;
+ };
+};
+
#define STARFIVE_AES_AESDIO0R (STARFIVE_AES_REGS_OFFSET + 0x0)
#define STARFIVE_AES_KEY0 (STARFIVE_AES_REGS_OFFSET + 0x4)
#define STARFIVE_AES_KEY1 (STARFIVE_AES_REGS_OFFSET + 0x8)
diff --git a/drivers/crypto/starfive/starfive-str.h b/drivers/crypto/starfive/starfive-str.h
index 396529a9a8f1..13e6bf637a34 100644
--- a/drivers/crypto/starfive/starfive-str.h
+++ b/drivers/crypto/starfive/starfive-str.h
@@ -10,6 +10,8 @@
#include <crypto/engine.h>
#include <crypto/sha2.h>
#include <crypto/sm3.h>
+#include <crypto/internal/akcipher.h>
+#include <crypto/internal/rsa.h>

#include "starfive-regs.h"

@@ -19,6 +21,31 @@
#define STARFIVE_AES_IV_LEN AES_BLOCK_SIZE
#define STARFIVE_AES_CTR_LEN AES_BLOCK_SIZE

+struct starfive_rsa_key {
+ u8 *n;
+ u8 *e;
+ u8 *d;
+ u8 *p;
+ u8 *q;
+ u8 *dp;
+ u8 *dq;
+ u8 *qinv;
+ u8 *rinv;
+ u8 *rinv_p;
+ u8 *rinv_q;
+ u8 *mp;
+ u8 *rsqr;
+ u8 *rsqr_p;
+ u8 *rsqr_q;
+ u8 *pmp;
+ u8 *qmp;
+ int e_bitlen;
+ int d_bitlen;
+ int bitlen;
+ size_t key_sz;
+ bool crt_mode;
+};
+
struct starfive_sec_ctx {
struct crypto_engine_ctx enginectx;
struct starfive_sec_dev *sdev;
@@ -28,9 +55,12 @@ struct starfive_sec_ctx {
int keylen;
struct scatterlist sg[2];
size_t hash_len_total;
+ size_t rsa_key_sz;
+ struct starfive_rsa_key rsa_key;
u8 *buffer;

union {
+ struct crypto_akcipher *akcipher;
struct crypto_aead *aead;
struct crypto_shash *shash;
} fallback;
@@ -49,6 +79,7 @@ struct starfive_sec_dev {
phys_addr_t io_phys_base;
void *aes_data;
void *hash_data;
+ void *pka_data;

size_t data_buf_len;
int pages_count;
@@ -88,6 +119,7 @@ struct starfive_sec_request_ctx {
union {
union starfive_aes_csr aes;
union starfive_hash_csr hash;
+ union starfive_pka_cacr pka;
} csr;

struct scatterlist *in_sg;
@@ -156,4 +188,7 @@ void starfive_hash_unregister_algs(void);
int starfive_aes_register_algs(void);
void starfive_aes_unregister_algs(void);

+int starfive_pka_register_algs(void);
+void starfive_pka_unregister_algs(void);
+
#endif
--
2.25.1