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-rw-r--r--drivers/crypto/allwinner/sun4i-ss/Makefile4
-rw-r--r--drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c644
-rw-r--r--drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c562
-rw-r--r--drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c545
-rw-r--r--drivers/crypto/allwinner/sun4i-ss/sun4i-ss-prng.c69
-rw-r--r--drivers/crypto/allwinner/sun4i-ss/sun4i-ss.h236
6 files changed, 2060 insertions, 0 deletions
diff --git a/drivers/crypto/allwinner/sun4i-ss/Makefile b/drivers/crypto/allwinner/sun4i-ss/Makefile
new file mode 100644
index 000000000..c0a2797d3
--- /dev/null
+++ b/drivers/crypto/allwinner/sun4i-ss/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_CRYPTO_DEV_SUN4I_SS) += sun4i-ss.o
+sun4i-ss-y += sun4i-ss-core.o sun4i-ss-hash.o sun4i-ss-cipher.o
+sun4i-ss-$(CONFIG_CRYPTO_DEV_SUN4I_SS_PRNG) += sun4i-ss-prng.o
diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c
new file mode 100644
index 000000000..10fe9f73a
--- /dev/null
+++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c
@@ -0,0 +1,644 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * sun4i-ss-cipher.c - hardware cryptographic accelerator for Allwinner A20 SoC
+ *
+ * Copyright (C) 2013-2015 Corentin LABBE <clabbe.montjoie@gmail.com>
+ *
+ * This file add support for AES cipher with 128,192,256 bits
+ * keysize in CBC and ECB mode.
+ * Add support also for DES and 3DES in CBC and ECB mode.
+ *
+ * You could find the datasheet in Documentation/arm/sunxi.rst
+ */
+#include "sun4i-ss.h"
+
+static int noinline_for_stack sun4i_ss_opti_poll(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sun4i_ss_ctx *ss = op->ss;
+ unsigned int ivsize = crypto_skcipher_ivsize(tfm);
+ struct sun4i_cipher_req_ctx *ctx = skcipher_request_ctx(areq);
+ u32 mode = ctx->mode;
+ /* when activating SS, the default FIFO space is SS_RX_DEFAULT(32) */
+ u32 rx_cnt = SS_RX_DEFAULT;
+ u32 tx_cnt = 0;
+ u32 spaces;
+ u32 v;
+ int err = 0;
+ unsigned int i;
+ unsigned int ileft = areq->cryptlen;
+ unsigned int oleft = areq->cryptlen;
+ unsigned int todo;
+ unsigned long pi = 0, po = 0; /* progress for in and out */
+ bool miter_err;
+ struct sg_mapping_iter mi, mo;
+ unsigned int oi, oo; /* offset for in and out */
+ unsigned long flags;
+ struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
+ struct sun4i_ss_alg_template *algt;
+
+ if (!areq->cryptlen)
+ return 0;
+
+ if (!areq->src || !areq->dst) {
+ dev_err_ratelimited(ss->dev, "ERROR: Some SGs are NULL\n");
+ return -EINVAL;
+ }
+
+ if (areq->iv && ivsize > 0 && mode & SS_DECRYPTION) {
+ scatterwalk_map_and_copy(ctx->backup_iv, areq->src,
+ areq->cryptlen - ivsize, ivsize, 0);
+ }
+
+ if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN4I_SS_DEBUG)) {
+ algt = container_of(alg, struct sun4i_ss_alg_template, alg.crypto);
+ algt->stat_opti++;
+ algt->stat_bytes += areq->cryptlen;
+ }
+
+ spin_lock_irqsave(&ss->slock, flags);
+
+ for (i = 0; i < op->keylen / 4; i++)
+ writesl(ss->base + SS_KEY0 + i * 4, &op->key[i], 1);
+
+ if (areq->iv) {
+ for (i = 0; i < 4 && i < ivsize / 4; i++) {
+ v = *(u32 *)(areq->iv + i * 4);
+ writesl(ss->base + SS_IV0 + i * 4, &v, 1);
+ }
+ }
+ writel(mode, ss->base + SS_CTL);
+
+
+ ileft = areq->cryptlen / 4;
+ oleft = areq->cryptlen / 4;
+ oi = 0;
+ oo = 0;
+ do {
+ if (ileft) {
+ sg_miter_start(&mi, areq->src, sg_nents(areq->src),
+ SG_MITER_FROM_SG | SG_MITER_ATOMIC);
+ if (pi)
+ sg_miter_skip(&mi, pi);
+ miter_err = sg_miter_next(&mi);
+ if (!miter_err || !mi.addr) {
+ dev_err_ratelimited(ss->dev, "ERROR: sg_miter return null\n");
+ err = -EINVAL;
+ goto release_ss;
+ }
+ todo = min(rx_cnt, ileft);
+ todo = min_t(size_t, todo, (mi.length - oi) / 4);
+ if (todo) {
+ ileft -= todo;
+ writesl(ss->base + SS_RXFIFO, mi.addr + oi, todo);
+ oi += todo * 4;
+ }
+ if (oi == mi.length) {
+ pi += mi.length;
+ oi = 0;
+ }
+ sg_miter_stop(&mi);
+ }
+
+ spaces = readl(ss->base + SS_FCSR);
+ rx_cnt = SS_RXFIFO_SPACES(spaces);
+ tx_cnt = SS_TXFIFO_SPACES(spaces);
+
+ sg_miter_start(&mo, areq->dst, sg_nents(areq->dst),
+ SG_MITER_TO_SG | SG_MITER_ATOMIC);
+ if (po)
+ sg_miter_skip(&mo, po);
+ miter_err = sg_miter_next(&mo);
+ if (!miter_err || !mo.addr) {
+ dev_err_ratelimited(ss->dev, "ERROR: sg_miter return null\n");
+ err = -EINVAL;
+ goto release_ss;
+ }
+ todo = min(tx_cnt, oleft);
+ todo = min_t(size_t, todo, (mo.length - oo) / 4);
+ if (todo) {
+ oleft -= todo;
+ readsl(ss->base + SS_TXFIFO, mo.addr + oo, todo);
+ oo += todo * 4;
+ }
+ if (oo == mo.length) {
+ oo = 0;
+ po += mo.length;
+ }
+ sg_miter_stop(&mo);
+ } while (oleft);
+
+ if (areq->iv) {
+ if (mode & SS_DECRYPTION) {
+ memcpy(areq->iv, ctx->backup_iv, ivsize);
+ memzero_explicit(ctx->backup_iv, ivsize);
+ } else {
+ scatterwalk_map_and_copy(areq->iv, areq->dst, areq->cryptlen - ivsize,
+ ivsize, 0);
+ }
+ }
+
+release_ss:
+ writel(0, ss->base + SS_CTL);
+ spin_unlock_irqrestore(&ss->slock, flags);
+ return err;
+}
+
+static int noinline_for_stack sun4i_ss_cipher_poll_fallback(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sun4i_cipher_req_ctx *ctx = skcipher_request_ctx(areq);
+ int err;
+ struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
+ struct sun4i_ss_alg_template *algt;
+
+ if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN4I_SS_DEBUG)) {
+ algt = container_of(alg, struct sun4i_ss_alg_template, alg.crypto);
+ algt->stat_fb++;
+ }
+
+ skcipher_request_set_tfm(&ctx->fallback_req, op->fallback_tfm);
+ skcipher_request_set_callback(&ctx->fallback_req, areq->base.flags,
+ areq->base.complete, areq->base.data);
+ skcipher_request_set_crypt(&ctx->fallback_req, areq->src, areq->dst,
+ areq->cryptlen, areq->iv);
+ if (ctx->mode & SS_DECRYPTION)
+ err = crypto_skcipher_decrypt(&ctx->fallback_req);
+ else
+ err = crypto_skcipher_encrypt(&ctx->fallback_req);
+
+ return err;
+}
+
+/* Generic function that support SG with size not multiple of 4 */
+static int sun4i_ss_cipher_poll(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sun4i_ss_ctx *ss = op->ss;
+ int no_chunk = 1;
+ struct scatterlist *in_sg = areq->src;
+ struct scatterlist *out_sg = areq->dst;
+ unsigned int ivsize = crypto_skcipher_ivsize(tfm);
+ struct sun4i_cipher_req_ctx *ctx = skcipher_request_ctx(areq);
+ struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
+ struct sun4i_ss_alg_template *algt;
+ u32 mode = ctx->mode;
+ /* when activating SS, the default FIFO space is SS_RX_DEFAULT(32) */
+ u32 rx_cnt = SS_RX_DEFAULT;
+ u32 tx_cnt = 0;
+ u32 v;
+ u32 spaces;
+ int err = 0;
+ unsigned int i;
+ unsigned int ileft = areq->cryptlen;
+ unsigned int oleft = areq->cryptlen;
+ unsigned int todo;
+ struct sg_mapping_iter mi, mo;
+ unsigned long pi = 0, po = 0; /* progress for in and out */
+ bool miter_err;
+ unsigned int oi, oo; /* offset for in and out */
+ unsigned int ob = 0; /* offset in buf */
+ unsigned int obo = 0; /* offset in bufo*/
+ unsigned int obl = 0; /* length of data in bufo */
+ unsigned long flags;
+ bool need_fallback = false;
+
+ if (!areq->cryptlen)
+ return 0;
+
+ if (!areq->src || !areq->dst) {
+ dev_err_ratelimited(ss->dev, "ERROR: Some SGs are NULL\n");
+ return -EINVAL;
+ }
+
+ algt = container_of(alg, struct sun4i_ss_alg_template, alg.crypto);
+ if (areq->cryptlen % algt->alg.crypto.base.cra_blocksize)
+ need_fallback = true;
+
+ /*
+ * if we have only SGs with size multiple of 4,
+ * we can use the SS optimized function
+ */
+ while (in_sg && no_chunk == 1) {
+ if ((in_sg->length | in_sg->offset) & 3u)
+ no_chunk = 0;
+ in_sg = sg_next(in_sg);
+ }
+ while (out_sg && no_chunk == 1) {
+ if ((out_sg->length | out_sg->offset) & 3u)
+ no_chunk = 0;
+ out_sg = sg_next(out_sg);
+ }
+
+ if (no_chunk == 1 && !need_fallback)
+ return sun4i_ss_opti_poll(areq);
+
+ if (need_fallback)
+ return sun4i_ss_cipher_poll_fallback(areq);
+
+ if (areq->iv && ivsize > 0 && mode & SS_DECRYPTION) {
+ scatterwalk_map_and_copy(ctx->backup_iv, areq->src,
+ areq->cryptlen - ivsize, ivsize, 0);
+ }
+
+ if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN4I_SS_DEBUG)) {
+ algt->stat_req++;
+ algt->stat_bytes += areq->cryptlen;
+ }
+
+ spin_lock_irqsave(&ss->slock, flags);
+
+ for (i = 0; i < op->keylen / 4; i++)
+ writesl(ss->base + SS_KEY0 + i * 4, &op->key[i], 1);
+
+ if (areq->iv) {
+ for (i = 0; i < 4 && i < ivsize / 4; i++) {
+ v = *(u32 *)(areq->iv + i * 4);
+ writesl(ss->base + SS_IV0 + i * 4, &v, 1);
+ }
+ }
+ writel(mode, ss->base + SS_CTL);
+
+ ileft = areq->cryptlen;
+ oleft = areq->cryptlen;
+ oi = 0;
+ oo = 0;
+
+ while (oleft) {
+ if (ileft) {
+ sg_miter_start(&mi, areq->src, sg_nents(areq->src),
+ SG_MITER_FROM_SG | SG_MITER_ATOMIC);
+ if (pi)
+ sg_miter_skip(&mi, pi);
+ miter_err = sg_miter_next(&mi);
+ if (!miter_err || !mi.addr) {
+ dev_err_ratelimited(ss->dev, "ERROR: sg_miter return null\n");
+ err = -EINVAL;
+ goto release_ss;
+ }
+ /*
+ * todo is the number of consecutive 4byte word that we
+ * can read from current SG
+ */
+ todo = min(rx_cnt, ileft / 4);
+ todo = min_t(size_t, todo, (mi.length - oi) / 4);
+ if (todo && !ob) {
+ writesl(ss->base + SS_RXFIFO, mi.addr + oi,
+ todo);
+ ileft -= todo * 4;
+ oi += todo * 4;
+ } else {
+ /*
+ * not enough consecutive bytes, so we need to
+ * linearize in buf. todo is in bytes
+ * After that copy, if we have a multiple of 4
+ * we need to be able to write all buf in one
+ * pass, so it is why we min() with rx_cnt
+ */
+ todo = min(rx_cnt * 4 - ob, ileft);
+ todo = min_t(size_t, todo, mi.length - oi);
+ memcpy(ss->buf + ob, mi.addr + oi, todo);
+ ileft -= todo;
+ oi += todo;
+ ob += todo;
+ if (!(ob % 4)) {
+ writesl(ss->base + SS_RXFIFO, ss->buf,
+ ob / 4);
+ ob = 0;
+ }
+ }
+ if (oi == mi.length) {
+ pi += mi.length;
+ oi = 0;
+ }
+ sg_miter_stop(&mi);
+ }
+
+ spaces = readl(ss->base + SS_FCSR);
+ rx_cnt = SS_RXFIFO_SPACES(spaces);
+ tx_cnt = SS_TXFIFO_SPACES(spaces);
+
+ if (!tx_cnt)
+ continue;
+ sg_miter_start(&mo, areq->dst, sg_nents(areq->dst),
+ SG_MITER_TO_SG | SG_MITER_ATOMIC);
+ if (po)
+ sg_miter_skip(&mo, po);
+ miter_err = sg_miter_next(&mo);
+ if (!miter_err || !mo.addr) {
+ dev_err_ratelimited(ss->dev, "ERROR: sg_miter return null\n");
+ err = -EINVAL;
+ goto release_ss;
+ }
+ /* todo in 4bytes word */
+ todo = min(tx_cnt, oleft / 4);
+ todo = min_t(size_t, todo, (mo.length - oo) / 4);
+
+ if (todo) {
+ readsl(ss->base + SS_TXFIFO, mo.addr + oo, todo);
+ oleft -= todo * 4;
+ oo += todo * 4;
+ if (oo == mo.length) {
+ po += mo.length;
+ oo = 0;
+ }
+ } else {
+ /*
+ * read obl bytes in bufo, we read at maximum for
+ * emptying the device
+ */
+ readsl(ss->base + SS_TXFIFO, ss->bufo, tx_cnt);
+ obl = tx_cnt * 4;
+ obo = 0;
+ do {
+ /*
+ * how many bytes we can copy ?
+ * no more than remaining SG size
+ * no more than remaining buffer
+ * no need to test against oleft
+ */
+ todo = min_t(size_t,
+ mo.length - oo, obl - obo);
+ memcpy(mo.addr + oo, ss->bufo + obo, todo);
+ oleft -= todo;
+ obo += todo;
+ oo += todo;
+ if (oo == mo.length) {
+ po += mo.length;
+ sg_miter_next(&mo);
+ oo = 0;
+ }
+ } while (obo < obl);
+ /* bufo must be fully used here */
+ }
+ sg_miter_stop(&mo);
+ }
+ if (areq->iv) {
+ if (mode & SS_DECRYPTION) {
+ memcpy(areq->iv, ctx->backup_iv, ivsize);
+ memzero_explicit(ctx->backup_iv, ivsize);
+ } else {
+ scatterwalk_map_and_copy(areq->iv, areq->dst, areq->cryptlen - ivsize,
+ ivsize, 0);
+ }
+ }
+
+release_ss:
+ writel(0, ss->base + SS_CTL);
+ spin_unlock_irqrestore(&ss->slock, flags);
+
+ return err;
+}
+
+/* CBC AES */
+int sun4i_ss_cbc_aes_encrypt(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sun4i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
+
+ rctx->mode = SS_OP_AES | SS_CBC | SS_ENABLED | SS_ENCRYPTION |
+ op->keymode;
+ return sun4i_ss_cipher_poll(areq);
+}
+
+int sun4i_ss_cbc_aes_decrypt(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sun4i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
+
+ rctx->mode = SS_OP_AES | SS_CBC | SS_ENABLED | SS_DECRYPTION |
+ op->keymode;
+ return sun4i_ss_cipher_poll(areq);
+}
+
+/* ECB AES */
+int sun4i_ss_ecb_aes_encrypt(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sun4i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
+
+ rctx->mode = SS_OP_AES | SS_ECB | SS_ENABLED | SS_ENCRYPTION |
+ op->keymode;
+ return sun4i_ss_cipher_poll(areq);
+}
+
+int sun4i_ss_ecb_aes_decrypt(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sun4i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
+
+ rctx->mode = SS_OP_AES | SS_ECB | SS_ENABLED | SS_DECRYPTION |
+ op->keymode;
+ return sun4i_ss_cipher_poll(areq);
+}
+
+/* CBC DES */
+int sun4i_ss_cbc_des_encrypt(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sun4i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
+
+ rctx->mode = SS_OP_DES | SS_CBC | SS_ENABLED | SS_ENCRYPTION |
+ op->keymode;
+ return sun4i_ss_cipher_poll(areq);
+}
+
+int sun4i_ss_cbc_des_decrypt(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sun4i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
+
+ rctx->mode = SS_OP_DES | SS_CBC | SS_ENABLED | SS_DECRYPTION |
+ op->keymode;
+ return sun4i_ss_cipher_poll(areq);
+}
+
+/* ECB DES */
+int sun4i_ss_ecb_des_encrypt(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sun4i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
+
+ rctx->mode = SS_OP_DES | SS_ECB | SS_ENABLED | SS_ENCRYPTION |
+ op->keymode;
+ return sun4i_ss_cipher_poll(areq);
+}
+
+int sun4i_ss_ecb_des_decrypt(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sun4i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
+
+ rctx->mode = SS_OP_DES | SS_ECB | SS_ENABLED | SS_DECRYPTION |
+ op->keymode;
+ return sun4i_ss_cipher_poll(areq);
+}
+
+/* CBC 3DES */
+int sun4i_ss_cbc_des3_encrypt(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sun4i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
+
+ rctx->mode = SS_OP_3DES | SS_CBC | SS_ENABLED | SS_ENCRYPTION |
+ op->keymode;
+ return sun4i_ss_cipher_poll(areq);
+}
+
+int sun4i_ss_cbc_des3_decrypt(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sun4i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
+
+ rctx->mode = SS_OP_3DES | SS_CBC | SS_ENABLED | SS_DECRYPTION |
+ op->keymode;
+ return sun4i_ss_cipher_poll(areq);
+}
+
+/* ECB 3DES */
+int sun4i_ss_ecb_des3_encrypt(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sun4i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
+
+ rctx->mode = SS_OP_3DES | SS_ECB | SS_ENABLED | SS_ENCRYPTION |
+ op->keymode;
+ return sun4i_ss_cipher_poll(areq);
+}
+
+int sun4i_ss_ecb_des3_decrypt(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sun4i_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
+
+ rctx->mode = SS_OP_3DES | SS_ECB | SS_ENABLED | SS_DECRYPTION |
+ op->keymode;
+ return sun4i_ss_cipher_poll(areq);
+}
+
+int sun4i_ss_cipher_init(struct crypto_tfm *tfm)
+{
+ struct sun4i_tfm_ctx *op = crypto_tfm_ctx(tfm);
+ struct sun4i_ss_alg_template *algt;
+ const char *name = crypto_tfm_alg_name(tfm);
+ int err;
+
+ memset(op, 0, sizeof(struct sun4i_tfm_ctx));
+
+ algt = container_of(tfm->__crt_alg, struct sun4i_ss_alg_template,
+ alg.crypto.base);
+ op->ss = algt->ss;
+
+ op->fallback_tfm = crypto_alloc_skcipher(name, 0, CRYPTO_ALG_NEED_FALLBACK);
+ if (IS_ERR(op->fallback_tfm)) {
+ dev_err(op->ss->dev, "ERROR: Cannot allocate fallback for %s %ld\n",
+ name, PTR_ERR(op->fallback_tfm));
+ return PTR_ERR(op->fallback_tfm);
+ }
+
+ crypto_skcipher_set_reqsize(__crypto_skcipher_cast(tfm),
+ sizeof(struct sun4i_cipher_req_ctx) +
+ crypto_skcipher_reqsize(op->fallback_tfm));
+
+ err = pm_runtime_resume_and_get(op->ss->dev);
+ if (err < 0)
+ goto error_pm;
+
+ return 0;
+error_pm:
+ crypto_free_skcipher(op->fallback_tfm);
+ return err;
+}
+
+void sun4i_ss_cipher_exit(struct crypto_tfm *tfm)
+{
+ struct sun4i_tfm_ctx *op = crypto_tfm_ctx(tfm);
+
+ crypto_free_skcipher(op->fallback_tfm);
+ pm_runtime_put(op->ss->dev);
+}
+
+/* check and set the AES key, prepare the mode to be used */
+int sun4i_ss_aes_setkey(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sun4i_ss_ctx *ss = op->ss;
+
+ switch (keylen) {
+ case 128 / 8:
+ op->keymode = SS_AES_128BITS;
+ break;
+ case 192 / 8:
+ op->keymode = SS_AES_192BITS;
+ break;
+ case 256 / 8:
+ op->keymode = SS_AES_256BITS;
+ break;
+ default:
+ dev_dbg(ss->dev, "ERROR: Invalid keylen %u\n", keylen);
+ return -EINVAL;
+ }
+ op->keylen = keylen;
+ memcpy(op->key, key, keylen);
+
+ crypto_skcipher_clear_flags(op->fallback_tfm, CRYPTO_TFM_REQ_MASK);
+ crypto_skcipher_set_flags(op->fallback_tfm, tfm->base.crt_flags & CRYPTO_TFM_REQ_MASK);
+
+ return crypto_skcipher_setkey(op->fallback_tfm, key, keylen);
+}
+
+/* check and set the DES key, prepare the mode to be used */
+int sun4i_ss_des_setkey(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ int err;
+
+ err = verify_skcipher_des_key(tfm, key);
+ if (err)
+ return err;
+
+ op->keylen = keylen;
+ memcpy(op->key, key, keylen);
+
+ crypto_skcipher_clear_flags(op->fallback_tfm, CRYPTO_TFM_REQ_MASK);
+ crypto_skcipher_set_flags(op->fallback_tfm, tfm->base.crt_flags & CRYPTO_TFM_REQ_MASK);
+
+ return crypto_skcipher_setkey(op->fallback_tfm, key, keylen);
+}
+
+/* check and set the 3DES key, prepare the mode to be used */
+int sun4i_ss_des3_setkey(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct sun4i_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ int err;
+
+ err = verify_skcipher_des3_key(tfm, key);
+ if (err)
+ return err;
+
+ op->keylen = keylen;
+ memcpy(op->key, key, keylen);
+
+ crypto_skcipher_clear_flags(op->fallback_tfm, CRYPTO_TFM_REQ_MASK);
+ crypto_skcipher_set_flags(op->fallback_tfm, tfm->base.crt_flags & CRYPTO_TFM_REQ_MASK);
+
+ return crypto_skcipher_setkey(op->fallback_tfm, key, keylen);
+}
diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
new file mode 100644
index 000000000..006e40133
--- /dev/null
+++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
@@ -0,0 +1,562 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * sun4i-ss-core.c - hardware cryptographic accelerator for Allwinner A20 SoC
+ *
+ * Copyright (C) 2013-2015 Corentin LABBE <clabbe.montjoie@gmail.com>
+ *
+ * Core file which registers crypto algorithms supported by the SS.
+ *
+ * You could find a link for the datasheet in Documentation/arm/sunxi.rst
+ */
+#include <linux/clk.h>
+#include <linux/crypto.h>
+#include <linux/debugfs.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <crypto/scatterwalk.h>
+#include <linux/scatterlist.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/reset.h>
+
+#include "sun4i-ss.h"
+
+static const struct ss_variant ss_a10_variant = {
+ .sha1_in_be = false,
+};
+
+static const struct ss_variant ss_a33_variant = {
+ .sha1_in_be = true,
+};
+
+static struct sun4i_ss_alg_template ss_algs[] = {
+{ .type = CRYPTO_ALG_TYPE_AHASH,
+ .mode = SS_OP_MD5,
+ .alg.hash = {
+ .init = sun4i_hash_init,
+ .update = sun4i_hash_update,
+ .final = sun4i_hash_final,
+ .finup = sun4i_hash_finup,
+ .digest = sun4i_hash_digest,
+ .export = sun4i_hash_export_md5,
+ .import = sun4i_hash_import_md5,
+ .halg = {
+ .digestsize = MD5_DIGEST_SIZE,
+ .statesize = sizeof(struct md5_state),
+ .base = {
+ .cra_name = "md5",
+ .cra_driver_name = "md5-sun4i-ss",
+ .cra_priority = 300,
+ .cra_alignmask = 3,
+ .cra_blocksize = MD5_HMAC_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct sun4i_req_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_init = sun4i_hash_crainit,
+ .cra_exit = sun4i_hash_craexit,
+ }
+ }
+ }
+},
+{ .type = CRYPTO_ALG_TYPE_AHASH,
+ .mode = SS_OP_SHA1,
+ .alg.hash = {
+ .init = sun4i_hash_init,
+ .update = sun4i_hash_update,
+ .final = sun4i_hash_final,
+ .finup = sun4i_hash_finup,
+ .digest = sun4i_hash_digest,
+ .export = sun4i_hash_export_sha1,
+ .import = sun4i_hash_import_sha1,
+ .halg = {
+ .digestsize = SHA1_DIGEST_SIZE,
+ .statesize = sizeof(struct sha1_state),
+ .base = {
+ .cra_name = "sha1",
+ .cra_driver_name = "sha1-sun4i-ss",
+ .cra_priority = 300,
+ .cra_alignmask = 3,
+ .cra_blocksize = SHA1_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct sun4i_req_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_init = sun4i_hash_crainit,
+ .cra_exit = sun4i_hash_craexit,
+ }
+ }
+ }
+},
+{ .type = CRYPTO_ALG_TYPE_SKCIPHER,
+ .alg.crypto = {
+ .setkey = sun4i_ss_aes_setkey,
+ .encrypt = sun4i_ss_cbc_aes_encrypt,
+ .decrypt = sun4i_ss_cbc_aes_decrypt,
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .base = {
+ .cra_name = "cbc(aes)",
+ .cra_driver_name = "cbc-aes-sun4i-ss",
+ .cra_priority = 300,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_NEED_FALLBACK,
+ .cra_ctxsize = sizeof(struct sun4i_tfm_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_alignmask = 3,
+ .cra_init = sun4i_ss_cipher_init,
+ .cra_exit = sun4i_ss_cipher_exit,
+ }
+ }
+},
+{ .type = CRYPTO_ALG_TYPE_SKCIPHER,
+ .alg.crypto = {
+ .setkey = sun4i_ss_aes_setkey,
+ .encrypt = sun4i_ss_ecb_aes_encrypt,
+ .decrypt = sun4i_ss_ecb_aes_decrypt,
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .base = {
+ .cra_name = "ecb(aes)",
+ .cra_driver_name = "ecb-aes-sun4i-ss",
+ .cra_priority = 300,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_NEED_FALLBACK,
+ .cra_ctxsize = sizeof(struct sun4i_tfm_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_alignmask = 3,
+ .cra_init = sun4i_ss_cipher_init,
+ .cra_exit = sun4i_ss_cipher_exit,
+ }
+ }
+},
+{ .type = CRYPTO_ALG_TYPE_SKCIPHER,
+ .alg.crypto = {
+ .setkey = sun4i_ss_des_setkey,
+ .encrypt = sun4i_ss_cbc_des_encrypt,
+ .decrypt = sun4i_ss_cbc_des_decrypt,
+ .min_keysize = DES_KEY_SIZE,
+ .max_keysize = DES_KEY_SIZE,
+ .ivsize = DES_BLOCK_SIZE,
+ .base = {
+ .cra_name = "cbc(des)",
+ .cra_driver_name = "cbc-des-sun4i-ss",
+ .cra_priority = 300,
+ .cra_blocksize = DES_BLOCK_SIZE,
+ .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_NEED_FALLBACK,
+ .cra_ctxsize = sizeof(struct sun4i_req_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_alignmask = 3,
+ .cra_init = sun4i_ss_cipher_init,
+ .cra_exit = sun4i_ss_cipher_exit,
+ }
+ }
+},
+{ .type = CRYPTO_ALG_TYPE_SKCIPHER,
+ .alg.crypto = {
+ .setkey = sun4i_ss_des_setkey,
+ .encrypt = sun4i_ss_ecb_des_encrypt,
+ .decrypt = sun4i_ss_ecb_des_decrypt,
+ .min_keysize = DES_KEY_SIZE,
+ .max_keysize = DES_KEY_SIZE,
+ .base = {
+ .cra_name = "ecb(des)",
+ .cra_driver_name = "ecb-des-sun4i-ss",
+ .cra_priority = 300,
+ .cra_blocksize = DES_BLOCK_SIZE,
+ .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_NEED_FALLBACK,
+ .cra_ctxsize = sizeof(struct sun4i_req_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_alignmask = 3,
+ .cra_init = sun4i_ss_cipher_init,
+ .cra_exit = sun4i_ss_cipher_exit,
+ }
+ }
+},
+{ .type = CRYPTO_ALG_TYPE_SKCIPHER,
+ .alg.crypto = {
+ .setkey = sun4i_ss_des3_setkey,
+ .encrypt = sun4i_ss_cbc_des3_encrypt,
+ .decrypt = sun4i_ss_cbc_des3_decrypt,
+ .min_keysize = DES3_EDE_KEY_SIZE,
+ .max_keysize = DES3_EDE_KEY_SIZE,
+ .ivsize = DES3_EDE_BLOCK_SIZE,
+ .base = {
+ .cra_name = "cbc(des3_ede)",
+ .cra_driver_name = "cbc-des3-sun4i-ss",
+ .cra_priority = 300,
+ .cra_blocksize = DES3_EDE_BLOCK_SIZE,
+ .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_NEED_FALLBACK,
+ .cra_ctxsize = sizeof(struct sun4i_req_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_alignmask = 3,
+ .cra_init = sun4i_ss_cipher_init,
+ .cra_exit = sun4i_ss_cipher_exit,
+ }
+ }
+},
+{ .type = CRYPTO_ALG_TYPE_SKCIPHER,
+ .alg.crypto = {
+ .setkey = sun4i_ss_des3_setkey,
+ .encrypt = sun4i_ss_ecb_des3_encrypt,
+ .decrypt = sun4i_ss_ecb_des3_decrypt,
+ .min_keysize = DES3_EDE_KEY_SIZE,
+ .max_keysize = DES3_EDE_KEY_SIZE,
+ .base = {
+ .cra_name = "ecb(des3_ede)",
+ .cra_driver_name = "ecb-des3-sun4i-ss",
+ .cra_priority = 300,
+ .cra_blocksize = DES3_EDE_BLOCK_SIZE,
+ .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_NEED_FALLBACK,
+ .cra_ctxsize = sizeof(struct sun4i_req_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_alignmask = 3,
+ .cra_init = sun4i_ss_cipher_init,
+ .cra_exit = sun4i_ss_cipher_exit,
+ }
+ }
+},
+#ifdef CONFIG_CRYPTO_DEV_SUN4I_SS_PRNG
+{
+ .type = CRYPTO_ALG_TYPE_RNG,
+ .alg.rng = {
+ .base = {
+ .cra_name = "stdrng",
+ .cra_driver_name = "sun4i_ss_rng",
+ .cra_priority = 300,
+ .cra_ctxsize = 0,
+ .cra_module = THIS_MODULE,
+ },
+ .generate = sun4i_ss_prng_generate,
+ .seed = sun4i_ss_prng_seed,
+ .seedsize = SS_SEED_LEN / BITS_PER_BYTE,
+ }
+},
+#endif
+};
+
+static int sun4i_ss_debugfs_show(struct seq_file *seq, void *v)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(ss_algs); i++) {
+ if (!ss_algs[i].ss)
+ continue;
+ switch (ss_algs[i].type) {
+ case CRYPTO_ALG_TYPE_SKCIPHER:
+ seq_printf(seq, "%s %s reqs=%lu opti=%lu fallback=%lu tsize=%lu\n",
+ ss_algs[i].alg.crypto.base.cra_driver_name,
+ ss_algs[i].alg.crypto.base.cra_name,
+ ss_algs[i].stat_req, ss_algs[i].stat_opti, ss_algs[i].stat_fb,
+ ss_algs[i].stat_bytes);
+ break;
+ case CRYPTO_ALG_TYPE_RNG:
+ seq_printf(seq, "%s %s reqs=%lu tsize=%lu\n",
+ ss_algs[i].alg.rng.base.cra_driver_name,
+ ss_algs[i].alg.rng.base.cra_name,
+ ss_algs[i].stat_req, ss_algs[i].stat_bytes);
+ break;
+ case CRYPTO_ALG_TYPE_AHASH:
+ seq_printf(seq, "%s %s reqs=%lu\n",
+ ss_algs[i].alg.hash.halg.base.cra_driver_name,
+ ss_algs[i].alg.hash.halg.base.cra_name,
+ ss_algs[i].stat_req);
+ break;
+ }
+ }
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(sun4i_ss_debugfs);
+
+/*
+ * Power management strategy: The device is suspended unless a TFM exists for
+ * one of the algorithms proposed by this driver.
+ */
+static int sun4i_ss_pm_suspend(struct device *dev)
+{
+ struct sun4i_ss_ctx *ss = dev_get_drvdata(dev);
+
+ reset_control_assert(ss->reset);
+
+ clk_disable_unprepare(ss->ssclk);
+ clk_disable_unprepare(ss->busclk);
+ return 0;
+}
+
+static int sun4i_ss_pm_resume(struct device *dev)
+{
+ struct sun4i_ss_ctx *ss = dev_get_drvdata(dev);
+
+ int err;
+
+ err = clk_prepare_enable(ss->busclk);
+ if (err) {
+ dev_err(ss->dev, "Cannot prepare_enable busclk\n");
+ goto err_enable;
+ }
+
+ err = clk_prepare_enable(ss->ssclk);
+ if (err) {
+ dev_err(ss->dev, "Cannot prepare_enable ssclk\n");
+ goto err_enable;
+ }
+
+ err = reset_control_deassert(ss->reset);
+ if (err) {
+ dev_err(ss->dev, "Cannot deassert reset control\n");
+ goto err_enable;
+ }
+
+ return err;
+err_enable:
+ sun4i_ss_pm_suspend(dev);
+ return err;
+}
+
+static const struct dev_pm_ops sun4i_ss_pm_ops = {
+ SET_RUNTIME_PM_OPS(sun4i_ss_pm_suspend, sun4i_ss_pm_resume, NULL)
+};
+
+/*
+ * When power management is enabled, this function enables the PM and set the
+ * device as suspended
+ * When power management is disabled, this function just enables the device
+ */
+static int sun4i_ss_pm_init(struct sun4i_ss_ctx *ss)
+{
+ int err;
+
+ pm_runtime_use_autosuspend(ss->dev);
+ pm_runtime_set_autosuspend_delay(ss->dev, 2000);
+
+ err = pm_runtime_set_suspended(ss->dev);
+ if (err)
+ return err;
+ pm_runtime_enable(ss->dev);
+ return err;
+}
+
+static void sun4i_ss_pm_exit(struct sun4i_ss_ctx *ss)
+{
+ pm_runtime_disable(ss->dev);
+}
+
+static int sun4i_ss_probe(struct platform_device *pdev)
+{
+ u32 v;
+ int err, i;
+ unsigned long cr;
+ const unsigned long cr_ahb = 24 * 1000 * 1000;
+ const unsigned long cr_mod = 150 * 1000 * 1000;
+ struct sun4i_ss_ctx *ss;
+
+ if (!pdev->dev.of_node)
+ return -ENODEV;
+
+ ss = devm_kzalloc(&pdev->dev, sizeof(*ss), GFP_KERNEL);
+ if (!ss)
+ return -ENOMEM;
+
+ ss->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(ss->base)) {
+ dev_err(&pdev->dev, "Cannot request MMIO\n");
+ return PTR_ERR(ss->base);
+ }
+
+ ss->variant = of_device_get_match_data(&pdev->dev);
+ if (!ss->variant) {
+ dev_err(&pdev->dev, "Missing Security System variant\n");
+ return -EINVAL;
+ }
+
+ ss->ssclk = devm_clk_get(&pdev->dev, "mod");
+ if (IS_ERR(ss->ssclk)) {
+ err = PTR_ERR(ss->ssclk);
+ dev_err(&pdev->dev, "Cannot get SS clock err=%d\n", err);
+ return err;
+ }
+ dev_dbg(&pdev->dev, "clock ss acquired\n");
+
+ ss->busclk = devm_clk_get(&pdev->dev, "ahb");
+ if (IS_ERR(ss->busclk)) {
+ err = PTR_ERR(ss->busclk);
+ dev_err(&pdev->dev, "Cannot get AHB SS clock err=%d\n", err);
+ return err;
+ }
+ dev_dbg(&pdev->dev, "clock ahb_ss acquired\n");
+
+ ss->reset = devm_reset_control_get_optional(&pdev->dev, "ahb");
+ if (IS_ERR(ss->reset))
+ return PTR_ERR(ss->reset);
+ if (!ss->reset)
+ dev_info(&pdev->dev, "no reset control found\n");
+
+ /*
+ * Check that clock have the correct rates given in the datasheet
+ * Try to set the clock to the maximum allowed
+ */
+ err = clk_set_rate(ss->ssclk, cr_mod);
+ if (err) {
+ dev_err(&pdev->dev, "Cannot set clock rate to ssclk\n");
+ return err;
+ }
+
+ /*
+ * The only impact on clocks below requirement are bad performance,
+ * so do not print "errors"
+ * warn on Overclocked clocks
+ */
+ cr = clk_get_rate(ss->busclk);
+ if (cr >= cr_ahb)
+ dev_dbg(&pdev->dev, "Clock bus %lu (%lu MHz) (must be >= %lu)\n",
+ cr, cr / 1000000, cr_ahb);
+ else
+ dev_warn(&pdev->dev, "Clock bus %lu (%lu MHz) (must be >= %lu)\n",
+ cr, cr / 1000000, cr_ahb);
+
+ cr = clk_get_rate(ss->ssclk);
+ if (cr <= cr_mod)
+ if (cr < cr_mod)
+ dev_warn(&pdev->dev, "Clock ss %lu (%lu MHz) (must be <= %lu)\n",
+ cr, cr / 1000000, cr_mod);
+ else
+ dev_dbg(&pdev->dev, "Clock ss %lu (%lu MHz) (must be <= %lu)\n",
+ cr, cr / 1000000, cr_mod);
+ else
+ dev_warn(&pdev->dev, "Clock ss is at %lu (%lu MHz) (must be <= %lu)\n",
+ cr, cr / 1000000, cr_mod);
+
+ ss->dev = &pdev->dev;
+ platform_set_drvdata(pdev, ss);
+
+ spin_lock_init(&ss->slock);
+
+ err = sun4i_ss_pm_init(ss);
+ if (err)
+ return err;
+
+ /*
+ * Datasheet named it "Die Bonding ID"
+ * I expect to be a sort of Security System Revision number.
+ * Since the A80 seems to have an other version of SS
+ * this info could be useful
+ */
+
+ err = pm_runtime_resume_and_get(ss->dev);
+ if (err < 0)
+ goto error_pm;
+
+ writel(SS_ENABLED, ss->base + SS_CTL);
+ v = readl(ss->base + SS_CTL);
+ v >>= 16;
+ v &= 0x07;
+ dev_info(&pdev->dev, "Die ID %d\n", v);
+ writel(0, ss->base + SS_CTL);
+
+ pm_runtime_put_sync(ss->dev);
+
+ for (i = 0; i < ARRAY_SIZE(ss_algs); i++) {
+ ss_algs[i].ss = ss;
+ switch (ss_algs[i].type) {
+ case CRYPTO_ALG_TYPE_SKCIPHER:
+ err = crypto_register_skcipher(&ss_algs[i].alg.crypto);
+ if (err) {
+ dev_err(ss->dev, "Fail to register %s\n",
+ ss_algs[i].alg.crypto.base.cra_name);
+ goto error_alg;
+ }
+ break;
+ case CRYPTO_ALG_TYPE_AHASH:
+ err = crypto_register_ahash(&ss_algs[i].alg.hash);
+ if (err) {
+ dev_err(ss->dev, "Fail to register %s\n",
+ ss_algs[i].alg.hash.halg.base.cra_name);
+ goto error_alg;
+ }
+ break;
+ case CRYPTO_ALG_TYPE_RNG:
+ err = crypto_register_rng(&ss_algs[i].alg.rng);
+ if (err) {
+ dev_err(ss->dev, "Fail to register %s\n",
+ ss_algs[i].alg.rng.base.cra_name);
+ }
+ break;
+ }
+ }
+
+ /* Ignore error of debugfs */
+ ss->dbgfs_dir = debugfs_create_dir("sun4i-ss", NULL);
+ ss->dbgfs_stats = debugfs_create_file("stats", 0444, ss->dbgfs_dir, ss,
+ &sun4i_ss_debugfs_fops);
+
+ return 0;
+error_alg:
+ i--;
+ for (; i >= 0; i--) {
+ switch (ss_algs[i].type) {
+ case CRYPTO_ALG_TYPE_SKCIPHER:
+ crypto_unregister_skcipher(&ss_algs[i].alg.crypto);
+ break;
+ case CRYPTO_ALG_TYPE_AHASH:
+ crypto_unregister_ahash(&ss_algs[i].alg.hash);
+ break;
+ case CRYPTO_ALG_TYPE_RNG:
+ crypto_unregister_rng(&ss_algs[i].alg.rng);
+ break;
+ }
+ }
+error_pm:
+ sun4i_ss_pm_exit(ss);
+ return err;
+}
+
+static int sun4i_ss_remove(struct platform_device *pdev)
+{
+ int i;
+ struct sun4i_ss_ctx *ss = platform_get_drvdata(pdev);
+
+ for (i = 0; i < ARRAY_SIZE(ss_algs); i++) {
+ switch (ss_algs[i].type) {
+ case CRYPTO_ALG_TYPE_SKCIPHER:
+ crypto_unregister_skcipher(&ss_algs[i].alg.crypto);
+ break;
+ case CRYPTO_ALG_TYPE_AHASH:
+ crypto_unregister_ahash(&ss_algs[i].alg.hash);
+ break;
+ case CRYPTO_ALG_TYPE_RNG:
+ crypto_unregister_rng(&ss_algs[i].alg.rng);
+ break;
+ }
+ }
+
+ sun4i_ss_pm_exit(ss);
+ return 0;
+}
+
+static const struct of_device_id a20ss_crypto_of_match_table[] = {
+ { .compatible = "allwinner,sun4i-a10-crypto",
+ .data = &ss_a10_variant
+ },
+ { .compatible = "allwinner,sun8i-a33-crypto",
+ .data = &ss_a33_variant
+ },
+ {}
+};
+MODULE_DEVICE_TABLE(of, a20ss_crypto_of_match_table);
+
+static struct platform_driver sun4i_ss_driver = {
+ .probe = sun4i_ss_probe,
+ .remove = sun4i_ss_remove,
+ .driver = {
+ .name = "sun4i-ss",
+ .pm = &sun4i_ss_pm_ops,
+ .of_match_table = a20ss_crypto_of_match_table,
+ },
+};
+
+module_platform_driver(sun4i_ss_driver);
+
+MODULE_ALIAS("platform:sun4i-ss");
+MODULE_DESCRIPTION("Allwinner Security System cryptographic accelerator");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Corentin LABBE <clabbe.montjoie@gmail.com>");
diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c
new file mode 100644
index 000000000..d28292762
--- /dev/null
+++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-hash.c
@@ -0,0 +1,545 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * sun4i-ss-hash.c - hardware cryptographic accelerator for Allwinner A20 SoC
+ *
+ * Copyright (C) 2013-2015 Corentin LABBE <clabbe.montjoie@gmail.com>
+ *
+ * This file add support for MD5 and SHA1.
+ *
+ * You could find the datasheet in Documentation/arm/sunxi.rst
+ */
+#include "sun4i-ss.h"
+#include <asm/unaligned.h>
+#include <linux/scatterlist.h>
+
+/* This is a totally arbitrary value */
+#define SS_TIMEOUT 100
+
+int sun4i_hash_crainit(struct crypto_tfm *tfm)
+{
+ struct sun4i_tfm_ctx *op = crypto_tfm_ctx(tfm);
+ struct ahash_alg *alg = __crypto_ahash_alg(tfm->__crt_alg);
+ struct sun4i_ss_alg_template *algt;
+ int err;
+
+ memset(op, 0, sizeof(struct sun4i_tfm_ctx));
+
+ algt = container_of(alg, struct sun4i_ss_alg_template, alg.hash);
+ op->ss = algt->ss;
+
+ err = pm_runtime_resume_and_get(op->ss->dev);
+ if (err < 0)
+ return err;
+
+ crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
+ sizeof(struct sun4i_req_ctx));
+ return 0;
+}
+
+void sun4i_hash_craexit(struct crypto_tfm *tfm)
+{
+ struct sun4i_tfm_ctx *op = crypto_tfm_ctx(tfm);
+
+ pm_runtime_put(op->ss->dev);
+}
+
+/* sun4i_hash_init: initialize request context */
+int sun4i_hash_init(struct ahash_request *areq)
+{
+ struct sun4i_req_ctx *op = ahash_request_ctx(areq);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
+ struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg);
+ struct sun4i_ss_alg_template *algt;
+
+ memset(op, 0, sizeof(struct sun4i_req_ctx));
+
+ algt = container_of(alg, struct sun4i_ss_alg_template, alg.hash);
+ op->mode = algt->mode;
+
+ return 0;
+}
+
+int sun4i_hash_export_md5(struct ahash_request *areq, void *out)
+{
+ struct sun4i_req_ctx *op = ahash_request_ctx(areq);
+ struct md5_state *octx = out;
+ int i;
+
+ octx->byte_count = op->byte_count + op->len;
+
+ memcpy(octx->block, op->buf, op->len);
+
+ if (op->byte_count) {
+ for (i = 0; i < 4; i++)
+ octx->hash[i] = op->hash[i];
+ } else {
+ octx->hash[0] = SHA1_H0;
+ octx->hash[1] = SHA1_H1;
+ octx->hash[2] = SHA1_H2;
+ octx->hash[3] = SHA1_H3;
+ }
+
+ return 0;
+}
+
+int sun4i_hash_import_md5(struct ahash_request *areq, const void *in)
+{
+ struct sun4i_req_ctx *op = ahash_request_ctx(areq);
+ const struct md5_state *ictx = in;
+ int i;
+
+ sun4i_hash_init(areq);
+
+ op->byte_count = ictx->byte_count & ~0x3F;
+ op->len = ictx->byte_count & 0x3F;
+
+ memcpy(op->buf, ictx->block, op->len);
+
+ for (i = 0; i < 4; i++)
+ op->hash[i] = ictx->hash[i];
+
+ return 0;
+}
+
+int sun4i_hash_export_sha1(struct ahash_request *areq, void *out)
+{
+ struct sun4i_req_ctx *op = ahash_request_ctx(areq);
+ struct sha1_state *octx = out;
+ int i;
+
+ octx->count = op->byte_count + op->len;
+
+ memcpy(octx->buffer, op->buf, op->len);
+
+ if (op->byte_count) {
+ for (i = 0; i < 5; i++)
+ octx->state[i] = op->hash[i];
+ } else {
+ octx->state[0] = SHA1_H0;
+ octx->state[1] = SHA1_H1;
+ octx->state[2] = SHA1_H2;
+ octx->state[3] = SHA1_H3;
+ octx->state[4] = SHA1_H4;
+ }
+
+ return 0;
+}
+
+int sun4i_hash_import_sha1(struct ahash_request *areq, const void *in)
+{
+ struct sun4i_req_ctx *op = ahash_request_ctx(areq);
+ const struct sha1_state *ictx = in;
+ int i;
+
+ sun4i_hash_init(areq);
+
+ op->byte_count = ictx->count & ~0x3F;
+ op->len = ictx->count & 0x3F;
+
+ memcpy(op->buf, ictx->buffer, op->len);
+
+ for (i = 0; i < 5; i++)
+ op->hash[i] = ictx->state[i];
+
+ return 0;
+}
+
+#define SS_HASH_UPDATE 1
+#define SS_HASH_FINAL 2
+
+/*
+ * sun4i_hash_update: update hash engine
+ *
+ * Could be used for both SHA1 and MD5
+ * Write data by step of 32bits and put then in the SS.
+ *
+ * Since we cannot leave partial data and hash state in the engine,
+ * we need to get the hash state at the end of this function.
+ * We can get the hash state every 64 bytes
+ *
+ * So the first work is to get the number of bytes to write to SS modulo 64
+ * The extra bytes will go to a temporary buffer op->buf storing op->len bytes
+ *
+ * So at the begin of update()
+ * if op->len + areq->nbytes < 64
+ * => all data will be written to wait buffer (op->buf) and end=0
+ * if not, write all data from op->buf to the device and position end to
+ * complete to 64bytes
+ *
+ * example 1:
+ * update1 60o => op->len=60
+ * update2 60o => need one more word to have 64 bytes
+ * end=4
+ * so write all data from op->buf and one word of SGs
+ * write remaining data in op->buf
+ * final state op->len=56
+ */
+static int sun4i_hash(struct ahash_request *areq)
+{
+ /*
+ * i is the total bytes read from SGs, to be compared to areq->nbytes
+ * i is important because we cannot rely on SG length since the sum of
+ * SG->length could be greater than areq->nbytes
+ *
+ * end is the position when we need to stop writing to the device,
+ * to be compared to i
+ *
+ * in_i: advancement in the current SG
+ */
+ unsigned int i = 0, end, fill, min_fill, nwait, nbw = 0, j = 0, todo;
+ unsigned int in_i = 0;
+ u32 spaces, rx_cnt = SS_RX_DEFAULT, bf[32] = {0}, v, ivmode = 0;
+ struct sun4i_req_ctx *op = ahash_request_ctx(areq);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
+ struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg);
+ struct sun4i_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm);
+ struct sun4i_ss_ctx *ss = tfmctx->ss;
+ struct sun4i_ss_alg_template *algt;
+ struct scatterlist *in_sg = areq->src;
+ struct sg_mapping_iter mi;
+ int in_r, err = 0;
+ size_t copied = 0;
+ u32 wb = 0;
+
+ dev_dbg(ss->dev, "%s %s bc=%llu len=%u mode=%x wl=%u h0=%0x",
+ __func__, crypto_tfm_alg_name(areq->base.tfm),
+ op->byte_count, areq->nbytes, op->mode,
+ op->len, op->hash[0]);
+
+ if (unlikely(!areq->nbytes) && !(op->flags & SS_HASH_FINAL))
+ return 0;
+
+ /* protect against overflow */
+ if (unlikely(areq->nbytes > UINT_MAX - op->len)) {
+ dev_err(ss->dev, "Cannot process too large request\n");
+ return -EINVAL;
+ }
+
+ if (op->len + areq->nbytes < 64 && !(op->flags & SS_HASH_FINAL)) {
+ /* linearize data to op->buf */
+ copied = sg_pcopy_to_buffer(areq->src, sg_nents(areq->src),
+ op->buf + op->len, areq->nbytes, 0);
+ op->len += copied;
+ return 0;
+ }
+
+ spin_lock_bh(&ss->slock);
+
+ /*
+ * if some data have been processed before,
+ * we need to restore the partial hash state
+ */
+ if (op->byte_count) {
+ ivmode = SS_IV_ARBITRARY;
+ for (i = 0; i < crypto_ahash_digestsize(tfm) / 4; i++)
+ writel(op->hash[i], ss->base + SS_IV0 + i * 4);
+ }
+ /* Enable the device */
+ writel(op->mode | SS_ENABLED | ivmode, ss->base + SS_CTL);
+
+ if (!(op->flags & SS_HASH_UPDATE))
+ goto hash_final;
+
+ /* start of handling data */
+ if (!(op->flags & SS_HASH_FINAL)) {
+ end = ((areq->nbytes + op->len) / 64) * 64 - op->len;
+
+ if (end > areq->nbytes || areq->nbytes - end > 63) {
+ dev_err(ss->dev, "ERROR: Bound error %u %u\n",
+ end, areq->nbytes);
+ err = -EINVAL;
+ goto release_ss;
+ }
+ } else {
+ /* Since we have the flag final, we can go up to modulo 4 */
+ if (areq->nbytes < 4)
+ end = 0;
+ else
+ end = ((areq->nbytes + op->len) / 4) * 4 - op->len;
+ }
+
+ /* TODO if SGlen % 4 and !op->len then DMA */
+ i = 1;
+ while (in_sg && i == 1) {
+ if (in_sg->length % 4)
+ i = 0;
+ in_sg = sg_next(in_sg);
+ }
+ if (i == 1 && !op->len && areq->nbytes)
+ dev_dbg(ss->dev, "We can DMA\n");
+
+ i = 0;
+ sg_miter_start(&mi, areq->src, sg_nents(areq->src),
+ SG_MITER_FROM_SG | SG_MITER_ATOMIC);
+ sg_miter_next(&mi);
+ in_i = 0;
+
+ do {
+ /*
+ * we need to linearize in two case:
+ * - the buffer is already used
+ * - the SG does not have enough byte remaining ( < 4)
+ */
+ if (op->len || (mi.length - in_i) < 4) {
+ /*
+ * if we have entered here we have two reason to stop
+ * - the buffer is full
+ * - reach the end
+ */
+ while (op->len < 64 && i < end) {
+ /* how many bytes we can read from current SG */
+ in_r = min(end - i, 64 - op->len);
+ in_r = min_t(size_t, mi.length - in_i, in_r);
+ memcpy(op->buf + op->len, mi.addr + in_i, in_r);
+ op->len += in_r;
+ i += in_r;
+ in_i += in_r;
+ if (in_i == mi.length) {
+ sg_miter_next(&mi);
+ in_i = 0;
+ }
+ }
+ if (op->len > 3 && !(op->len % 4)) {
+ /* write buf to the device */
+ writesl(ss->base + SS_RXFIFO, op->buf,
+ op->len / 4);
+ op->byte_count += op->len;
+ op->len = 0;
+ }
+ }
+ if (mi.length - in_i > 3 && i < end) {
+ /* how many bytes we can read from current SG */
+ in_r = min_t(size_t, mi.length - in_i, areq->nbytes - i);
+ in_r = min_t(size_t, ((mi.length - in_i) / 4) * 4, in_r);
+ /* how many bytes we can write in the device*/
+ todo = min3((u32)(end - i) / 4, rx_cnt, (u32)in_r / 4);
+ writesl(ss->base + SS_RXFIFO, mi.addr + in_i, todo);
+ op->byte_count += todo * 4;
+ i += todo * 4;
+ in_i += todo * 4;
+ rx_cnt -= todo;
+ if (!rx_cnt) {
+ spaces = readl(ss->base + SS_FCSR);
+ rx_cnt = SS_RXFIFO_SPACES(spaces);
+ }
+ if (in_i == mi.length) {
+ sg_miter_next(&mi);
+ in_i = 0;
+ }
+ }
+ } while (i < end);
+
+ /*
+ * Now we have written to the device all that we can,
+ * store the remaining bytes in op->buf
+ */
+ if ((areq->nbytes - i) < 64) {
+ while (i < areq->nbytes && in_i < mi.length && op->len < 64) {
+ /* how many bytes we can read from current SG */
+ in_r = min(areq->nbytes - i, 64 - op->len);
+ in_r = min_t(size_t, mi.length - in_i, in_r);
+ memcpy(op->buf + op->len, mi.addr + in_i, in_r);
+ op->len += in_r;
+ i += in_r;
+ in_i += in_r;
+ if (in_i == mi.length) {
+ sg_miter_next(&mi);
+ in_i = 0;
+ }
+ }
+ }
+
+ sg_miter_stop(&mi);
+
+ /*
+ * End of data process
+ * Now if we have the flag final go to finalize part
+ * If not, store the partial hash
+ */
+ if (op->flags & SS_HASH_FINAL)
+ goto hash_final;
+
+ writel(op->mode | SS_ENABLED | SS_DATA_END, ss->base + SS_CTL);
+ i = 0;
+ do {
+ v = readl(ss->base + SS_CTL);
+ i++;
+ } while (i < SS_TIMEOUT && (v & SS_DATA_END));
+ if (unlikely(i >= SS_TIMEOUT)) {
+ dev_err_ratelimited(ss->dev,
+ "ERROR: hash end timeout %d>%d ctl=%x len=%u\n",
+ i, SS_TIMEOUT, v, areq->nbytes);
+ err = -EIO;
+ goto release_ss;
+ }
+
+ /*
+ * The datasheet isn't very clear about when to retrieve the digest. The
+ * bit SS_DATA_END is cleared when the engine has processed the data and
+ * when the digest is computed *but* it doesn't mean the digest is
+ * available in the digest registers. Hence the delay to be sure we can
+ * read it.
+ */
+ ndelay(1);
+
+ for (i = 0; i < crypto_ahash_digestsize(tfm) / 4; i++)
+ op->hash[i] = readl(ss->base + SS_MD0 + i * 4);
+
+ goto release_ss;
+
+/*
+ * hash_final: finalize hashing operation
+ *
+ * If we have some remaining bytes, we write them.
+ * Then ask the SS for finalizing the hashing operation
+ *
+ * I do not check RX FIFO size in this function since the size is 32
+ * after each enabling and this function neither write more than 32 words.
+ * If we come from the update part, we cannot have more than
+ * 3 remaining bytes to write and SS is fast enough to not care about it.
+ */
+
+hash_final:
+ if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN4I_SS_DEBUG)) {
+ algt = container_of(alg, struct sun4i_ss_alg_template, alg.hash);
+ algt->stat_req++;
+ }
+
+ /* write the remaining words of the wait buffer */
+ if (op->len) {
+ nwait = op->len / 4;
+ if (nwait) {
+ writesl(ss->base + SS_RXFIFO, op->buf, nwait);
+ op->byte_count += 4 * nwait;
+ }
+
+ nbw = op->len - 4 * nwait;
+ if (nbw) {
+ wb = le32_to_cpup((__le32 *)(op->buf + nwait * 4));
+ wb &= GENMASK((nbw * 8) - 1, 0);
+
+ op->byte_count += nbw;
+ }
+ }
+
+ /* write the remaining bytes of the nbw buffer */
+ wb |= ((1 << 7) << (nbw * 8));
+ ((__le32 *)bf)[j++] = cpu_to_le32(wb);
+
+ /*
+ * number of space to pad to obtain 64o minus 8(size) minus 4 (final 1)
+ * I take the operations from other MD5/SHA1 implementations
+ */
+
+ /* last block size */
+ fill = 64 - (op->byte_count % 64);
+ min_fill = 2 * sizeof(u32) + (nbw ? 0 : sizeof(u32));
+
+ /* if we can't fill all data, jump to the next 64 block */
+ if (fill < min_fill)
+ fill += 64;
+
+ j += (fill - min_fill) / sizeof(u32);
+
+ /* write the length of data */
+ if (op->mode == SS_OP_SHA1) {
+ __be64 *bits = (__be64 *)&bf[j];
+ *bits = cpu_to_be64(op->byte_count << 3);
+ j += 2;
+ } else {
+ __le64 *bits = (__le64 *)&bf[j];
+ *bits = cpu_to_le64(op->byte_count << 3);
+ j += 2;
+ }
+ writesl(ss->base + SS_RXFIFO, bf, j);
+
+ /* Tell the SS to stop the hashing */
+ writel(op->mode | SS_ENABLED | SS_DATA_END, ss->base + SS_CTL);
+
+ /*
+ * Wait for SS to finish the hash.
+ * The timeout could happen only in case of bad overclocking
+ * or driver bug.
+ */
+ i = 0;
+ do {
+ v = readl(ss->base + SS_CTL);
+ i++;
+ } while (i < SS_TIMEOUT && (v & SS_DATA_END));
+ if (unlikely(i >= SS_TIMEOUT)) {
+ dev_err_ratelimited(ss->dev,
+ "ERROR: hash end timeout %d>%d ctl=%x len=%u\n",
+ i, SS_TIMEOUT, v, areq->nbytes);
+ err = -EIO;
+ goto release_ss;
+ }
+
+ /*
+ * The datasheet isn't very clear about when to retrieve the digest. The
+ * bit SS_DATA_END is cleared when the engine has processed the data and
+ * when the digest is computed *but* it doesn't mean the digest is
+ * available in the digest registers. Hence the delay to be sure we can
+ * read it.
+ */
+ ndelay(1);
+
+ /* Get the hash from the device */
+ if (op->mode == SS_OP_SHA1) {
+ for (i = 0; i < 5; i++) {
+ v = readl(ss->base + SS_MD0 + i * 4);
+ if (ss->variant->sha1_in_be)
+ put_unaligned_le32(v, areq->result + i * 4);
+ else
+ put_unaligned_be32(v, areq->result + i * 4);
+ }
+ } else {
+ for (i = 0; i < 4; i++) {
+ v = readl(ss->base + SS_MD0 + i * 4);
+ put_unaligned_le32(v, areq->result + i * 4);
+ }
+ }
+
+release_ss:
+ writel(0, ss->base + SS_CTL);
+ spin_unlock_bh(&ss->slock);
+ return err;
+}
+
+int sun4i_hash_final(struct ahash_request *areq)
+{
+ struct sun4i_req_ctx *op = ahash_request_ctx(areq);
+
+ op->flags = SS_HASH_FINAL;
+ return sun4i_hash(areq);
+}
+
+int sun4i_hash_update(struct ahash_request *areq)
+{
+ struct sun4i_req_ctx *op = ahash_request_ctx(areq);
+
+ op->flags = SS_HASH_UPDATE;
+ return sun4i_hash(areq);
+}
+
+/* sun4i_hash_finup: finalize hashing operation after an update */
+int sun4i_hash_finup(struct ahash_request *areq)
+{
+ struct sun4i_req_ctx *op = ahash_request_ctx(areq);
+
+ op->flags = SS_HASH_UPDATE | SS_HASH_FINAL;
+ return sun4i_hash(areq);
+}
+
+/* combo of init/update/final functions */
+int sun4i_hash_digest(struct ahash_request *areq)
+{
+ int err;
+ struct sun4i_req_ctx *op = ahash_request_ctx(areq);
+
+ err = sun4i_hash_init(areq);
+ if (err)
+ return err;
+
+ op->flags = SS_HASH_UPDATE | SS_HASH_FINAL;
+ return sun4i_hash(areq);
+}
diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-prng.c b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-prng.c
new file mode 100644
index 000000000..491fcb7b8
--- /dev/null
+++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-prng.c
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "sun4i-ss.h"
+
+int sun4i_ss_prng_seed(struct crypto_rng *tfm, const u8 *seed,
+ unsigned int slen)
+{
+ struct sun4i_ss_alg_template *algt;
+ struct rng_alg *alg = crypto_rng_alg(tfm);
+
+ algt = container_of(alg, struct sun4i_ss_alg_template, alg.rng);
+ memcpy(algt->ss->seed, seed, slen);
+
+ return 0;
+}
+
+int sun4i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src,
+ unsigned int slen, u8 *dst, unsigned int dlen)
+{
+ struct sun4i_ss_alg_template *algt;
+ struct rng_alg *alg = crypto_rng_alg(tfm);
+ int i, err;
+ u32 v;
+ u32 *data = (u32 *)dst;
+ const u32 mode = SS_OP_PRNG | SS_PRNG_CONTINUE | SS_ENABLED;
+ size_t len;
+ struct sun4i_ss_ctx *ss;
+ unsigned int todo = (dlen / 4) * 4;
+
+ algt = container_of(alg, struct sun4i_ss_alg_template, alg.rng);
+ ss = algt->ss;
+
+ err = pm_runtime_resume_and_get(ss->dev);
+ if (err < 0)
+ return err;
+
+ if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN4I_SS_DEBUG)) {
+ algt->stat_req++;
+ algt->stat_bytes += todo;
+ }
+
+ spin_lock_bh(&ss->slock);
+
+ writel(mode, ss->base + SS_CTL);
+
+ while (todo > 0) {
+ /* write the seed */
+ for (i = 0; i < SS_SEED_LEN / BITS_PER_LONG; i++)
+ writel(ss->seed[i], ss->base + SS_KEY0 + i * 4);
+
+ /* Read the random data */
+ len = min_t(size_t, SS_DATA_LEN / BITS_PER_BYTE, todo);
+ readsl(ss->base + SS_TXFIFO, data, len / 4);
+ data += len / 4;
+ todo -= len;
+
+ /* Update the seed */
+ for (i = 0; i < SS_SEED_LEN / BITS_PER_LONG; i++) {
+ v = readl(ss->base + SS_KEY0 + i * 4);
+ ss->seed[i] = v;
+ }
+ }
+
+ writel(0, ss->base + SS_CTL);
+ spin_unlock_bh(&ss->slock);
+
+ pm_runtime_put(ss->dev);
+
+ return 0;
+}
diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss.h b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss.h
new file mode 100644
index 000000000..ba59c7a48
--- /dev/null
+++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss.h
@@ -0,0 +1,236 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * sun4i-ss.h - hardware cryptographic accelerator for Allwinner A20 SoC
+ *
+ * Copyright (C) 2013-2015 Corentin LABBE <clabbe.montjoie@gmail.com>
+ *
+ * Support AES cipher with 128,192,256 bits keysize.
+ * Support MD5 and SHA1 hash algorithms.
+ * Support DES and 3DES
+ *
+ * You could find the datasheet in Documentation/arm/sunxi.rst
+ */
+
+#include <linux/clk.h>
+#include <linux/crypto.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+#include <crypto/scatterwalk.h>
+#include <linux/scatterlist.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/pm_runtime.h>
+#include <crypto/md5.h>
+#include <crypto/skcipher.h>
+#include <crypto/sha1.h>
+#include <crypto/hash.h>
+#include <crypto/internal/hash.h>
+#include <crypto/internal/skcipher.h>
+#include <crypto/aes.h>
+#include <crypto/internal/des.h>
+#include <crypto/internal/rng.h>
+#include <crypto/rng.h>
+
+#define SS_CTL 0x00
+#define SS_KEY0 0x04
+#define SS_KEY1 0x08
+#define SS_KEY2 0x0C
+#define SS_KEY3 0x10
+#define SS_KEY4 0x14
+#define SS_KEY5 0x18
+#define SS_KEY6 0x1C
+#define SS_KEY7 0x20
+
+#define SS_IV0 0x24
+#define SS_IV1 0x28
+#define SS_IV2 0x2C
+#define SS_IV3 0x30
+
+#define SS_FCSR 0x44
+
+#define SS_MD0 0x4C
+#define SS_MD1 0x50
+#define SS_MD2 0x54
+#define SS_MD3 0x58
+#define SS_MD4 0x5C
+
+#define SS_RXFIFO 0x200
+#define SS_TXFIFO 0x204
+
+/* SS_CTL configuration values */
+
+/* PRNG generator mode - bit 15 */
+#define SS_PRNG_ONESHOT (0 << 15)
+#define SS_PRNG_CONTINUE (1 << 15)
+
+/* IV mode for hash */
+#define SS_IV_ARBITRARY (1 << 14)
+
+/* SS operation mode - bits 12-13 */
+#define SS_ECB (0 << 12)
+#define SS_CBC (1 << 12)
+#define SS_CTS (3 << 12)
+
+/* Counter width for CNT mode - bits 10-11 */
+#define SS_CNT_16BITS (0 << 10)
+#define SS_CNT_32BITS (1 << 10)
+#define SS_CNT_64BITS (2 << 10)
+
+/* Key size for AES - bits 8-9 */
+#define SS_AES_128BITS (0 << 8)
+#define SS_AES_192BITS (1 << 8)
+#define SS_AES_256BITS (2 << 8)
+
+/* Operation direction - bit 7 */
+#define SS_ENCRYPTION (0 << 7)
+#define SS_DECRYPTION (1 << 7)
+
+/* SS Method - bits 4-6 */
+#define SS_OP_AES (0 << 4)
+#define SS_OP_DES (1 << 4)
+#define SS_OP_3DES (2 << 4)
+#define SS_OP_SHA1 (3 << 4)
+#define SS_OP_MD5 (4 << 4)
+#define SS_OP_PRNG (5 << 4)
+
+/* Data end bit - bit 2 */
+#define SS_DATA_END (1 << 2)
+
+/* PRNG start bit - bit 1 */
+#define SS_PRNG_START (1 << 1)
+
+/* SS Enable bit - bit 0 */
+#define SS_DISABLED (0 << 0)
+#define SS_ENABLED (1 << 0)
+
+/* SS_FCSR configuration values */
+/* RX FIFO status - bit 30 */
+#define SS_RXFIFO_FREE (1 << 30)
+
+/* RX FIFO empty spaces - bits 24-29 */
+#define SS_RXFIFO_SPACES(val) (((val) >> 24) & 0x3f)
+
+/* TX FIFO status - bit 22 */
+#define SS_TXFIFO_AVAILABLE (1 << 22)
+
+/* TX FIFO available spaces - bits 16-21 */
+#define SS_TXFIFO_SPACES(val) (((val) >> 16) & 0x3f)
+
+#define SS_RX_MAX 32
+#define SS_RX_DEFAULT SS_RX_MAX
+#define SS_TX_MAX 33
+
+#define SS_RXFIFO_EMP_INT_PENDING (1 << 10)
+#define SS_TXFIFO_AVA_INT_PENDING (1 << 8)
+#define SS_RXFIFO_EMP_INT_ENABLE (1 << 2)
+#define SS_TXFIFO_AVA_INT_ENABLE (1 << 0)
+
+#define SS_SEED_LEN 192
+#define SS_DATA_LEN 160
+
+/*
+ * struct ss_variant - Describe SS hardware variant
+ * @sha1_in_be: The SHA1 digest is given by SS in BE, and so need to be inverted.
+ */
+struct ss_variant {
+ bool sha1_in_be;
+};
+
+struct sun4i_ss_ctx {
+ const struct ss_variant *variant;
+ void __iomem *base;
+ int irq;
+ struct clk *busclk;
+ struct clk *ssclk;
+ struct reset_control *reset;
+ struct device *dev;
+ struct resource *res;
+ char buf[4 * SS_RX_MAX];/* buffer for linearize SG src */
+ char bufo[4 * SS_TX_MAX]; /* buffer for linearize SG dst */
+ spinlock_t slock; /* control the use of the device */
+#ifdef CONFIG_CRYPTO_DEV_SUN4I_SS_PRNG
+ u32 seed[SS_SEED_LEN / BITS_PER_LONG];
+#endif
+ struct dentry *dbgfs_dir;
+ struct dentry *dbgfs_stats;
+};
+
+struct sun4i_ss_alg_template {
+ u32 type;
+ u32 mode;
+ union {
+ struct skcipher_alg crypto;
+ struct ahash_alg hash;
+ struct rng_alg rng;
+ } alg;
+ struct sun4i_ss_ctx *ss;
+ unsigned long stat_req;
+ unsigned long stat_fb;
+ unsigned long stat_bytes;
+ unsigned long stat_opti;
+};
+
+struct sun4i_tfm_ctx {
+ u32 key[AES_MAX_KEY_SIZE / 4];/* divided by sizeof(u32) */
+ u32 keylen;
+ u32 keymode;
+ struct sun4i_ss_ctx *ss;
+ struct crypto_skcipher *fallback_tfm;
+};
+
+struct sun4i_cipher_req_ctx {
+ u32 mode;
+ u8 backup_iv[AES_BLOCK_SIZE];
+ struct skcipher_request fallback_req; // keep at the end
+};
+
+struct sun4i_req_ctx {
+ u32 mode;
+ u64 byte_count; /* number of bytes "uploaded" to the device */
+ u32 hash[5]; /* for storing SS_IVx register */
+ char buf[64];
+ unsigned int len;
+ int flags;
+};
+
+int sun4i_hash_crainit(struct crypto_tfm *tfm);
+void sun4i_hash_craexit(struct crypto_tfm *tfm);
+int sun4i_hash_init(struct ahash_request *areq);
+int sun4i_hash_update(struct ahash_request *areq);
+int sun4i_hash_final(struct ahash_request *areq);
+int sun4i_hash_finup(struct ahash_request *areq);
+int sun4i_hash_digest(struct ahash_request *areq);
+int sun4i_hash_export_md5(struct ahash_request *areq, void *out);
+int sun4i_hash_import_md5(struct ahash_request *areq, const void *in);
+int sun4i_hash_export_sha1(struct ahash_request *areq, void *out);
+int sun4i_hash_import_sha1(struct ahash_request *areq, const void *in);
+
+int sun4i_ss_cbc_aes_encrypt(struct skcipher_request *areq);
+int sun4i_ss_cbc_aes_decrypt(struct skcipher_request *areq);
+int sun4i_ss_ecb_aes_encrypt(struct skcipher_request *areq);
+int sun4i_ss_ecb_aes_decrypt(struct skcipher_request *areq);
+
+int sun4i_ss_cbc_des_encrypt(struct skcipher_request *areq);
+int sun4i_ss_cbc_des_decrypt(struct skcipher_request *areq);
+int sun4i_ss_ecb_des_encrypt(struct skcipher_request *areq);
+int sun4i_ss_ecb_des_decrypt(struct skcipher_request *areq);
+
+int sun4i_ss_cbc_des3_encrypt(struct skcipher_request *areq);
+int sun4i_ss_cbc_des3_decrypt(struct skcipher_request *areq);
+int sun4i_ss_ecb_des3_encrypt(struct skcipher_request *areq);
+int sun4i_ss_ecb_des3_decrypt(struct skcipher_request *areq);
+
+int sun4i_ss_cipher_init(struct crypto_tfm *tfm);
+void sun4i_ss_cipher_exit(struct crypto_tfm *tfm);
+int sun4i_ss_aes_setkey(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int keylen);
+int sun4i_ss_des_setkey(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int keylen);
+int sun4i_ss_des3_setkey(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int keylen);
+int sun4i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src,
+ unsigned int slen, u8 *dst, unsigned int dlen);
+int sun4i_ss_prng_seed(struct crypto_rng *tfm, const u8 *seed, unsigned int slen);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 17:41:16 +0000