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Message-Id: <20210518151655.125153-3-clabbe@baylibre.com>
Date: Tue, 18 May 2021 15:16:52 +0000
From: Corentin Labbe <clabbe@...libre.com>
To: davem@...emloft.net, herbert@...dor.apana.org.au,
linus.walleij@...aro.org, linux@...linux.org.uk,
robh+dt@...nel.org, ulli.kroll@...glemail.com
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
Corentin Labbe <clabbe@...libre.com>
Subject: [PATCH 2/5] crypto: Add sl3516 crypto engine
The cortina/gemini SL3516 SoC has a crypto IP name either (crypto
engine/crypto acceleration engine in the datasheet).
It support many algorithms like [AES|DES|3DES][ECB|CBC], SHA1, MD5 and
some HMAC.
This patch adds the core files and support for ecb(aes) and the RNG.
Signed-off-by: Corentin Labbe <clabbe@...libre.com>
---
drivers/crypto/Kconfig | 19 +
drivers/crypto/Makefile | 1 +
drivers/crypto/gemini/Makefile | 2 +
drivers/crypto/gemini/sl3516-ce-cipher.c | 388 ++++++++++++++++
drivers/crypto/gemini/sl3516-ce-core.c | 535 +++++++++++++++++++++++
drivers/crypto/gemini/sl3516-ce-rng.c | 61 +++
drivers/crypto/gemini/sl3516-ce.h | 349 +++++++++++++++
7 files changed, 1355 insertions(+)
create mode 100644 drivers/crypto/gemini/Makefile
create mode 100644 drivers/crypto/gemini/sl3516-ce-cipher.c
create mode 100644 drivers/crypto/gemini/sl3516-ce-core.c
create mode 100644 drivers/crypto/gemini/sl3516-ce-rng.c
create mode 100644 drivers/crypto/gemini/sl3516-ce.h
diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index 1d5b342e6b42..99b090790178 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -266,6 +266,25 @@ config CRYPTO_DEV_NIAGARA2
Group, which can perform encryption, decryption, hashing,
checksumming, and raw copies.
+config CRYPTO_DEV_SL3516
+ tristate "Stormlink SL3516 crypto offloader"
+ select CRYPTO_SKCIPHER
+ select CRYPTO_ENGINE
+ select CRYPTO_ECB
+ select CRYPTO_AES
+ select HW_RANDOM
+ help
+ This option allows you to have support for SL3516 crypto offloader.
+
+config CRYPTO_DEV_SL3516_DEBUG
+ bool "Enable SL3516 stats"
+ depends on CRYPTO_DEV_SL3516
+ depends on DEBUG_FS
+ help
+ Say y to enable SL3516 debug stats.
+ This will create /sys/kernel/debug/sl3516/stats for displaying
+ the number of requests per algorithm and other internal stats.
+
config CRYPTO_DEV_HIFN_795X
tristate "Driver HIFN 795x crypto accelerator chips"
select CRYPTO_LIB_DES
diff --git a/drivers/crypto/Makefile b/drivers/crypto/Makefile
index fa22cb19e242..1fe5120eb966 100644
--- a/drivers/crypto/Makefile
+++ b/drivers/crypto/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_CRYPTO_DEV_ROCKCHIP) += rockchip/
obj-$(CONFIG_CRYPTO_DEV_S5P) += s5p-sss.o
obj-$(CONFIG_CRYPTO_DEV_SA2UL) += sa2ul.o
obj-$(CONFIG_CRYPTO_DEV_SAHARA) += sahara.o
+obj-$(CONFIG_CRYPTO_DEV_SL3516) += gemini/
obj-$(CONFIG_ARCH_STM32) += stm32/
obj-$(CONFIG_CRYPTO_DEV_TALITOS) += talitos.o
obj-$(CONFIG_CRYPTO_DEV_UX500) += ux500/
diff --git a/drivers/crypto/gemini/Makefile b/drivers/crypto/gemini/Makefile
new file mode 100644
index 000000000000..c73c8b69260d
--- /dev/null
+++ b/drivers/crypto/gemini/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_CRYPTO_DEV_SL3516) += sl3516-ce.o
+sl3516-ce-y += sl3516-ce-core.o sl3516-ce-cipher.o sl3516-ce-rng.o
diff --git a/drivers/crypto/gemini/sl3516-ce-cipher.c b/drivers/crypto/gemini/sl3516-ce-cipher.c
new file mode 100644
index 000000000000..d9564c5c5ff7
--- /dev/null
+++ b/drivers/crypto/gemini/sl3516-ce-cipher.c
@@ -0,0 +1,388 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * sl3516-ce-cipher.c - hardware cryptographic offloader for Stormlink SL3516 SoC
+ *
+ * Copyright (C) 2021 Corentin LABBE <clabbe@...libre.com>
+ *
+ * This file adds support for AES cipher with 128,192,256 bits keysize in
+ * ECB mode.
+ */
+
+#include <linux/crypto.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/io.h>
+#include <linux/pm_runtime.h>
+#include <crypto/scatterwalk.h>
+#include <crypto/internal/skcipher.h>
+#include "sl3516-ce.h"
+
+/* sl3516_ce_need_fallback - check if a request can be handled by the CE */
+static bool sl3516_ce_need_fallback(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sl3516_ce_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sl3516_ce_dev *ce = op->ce;
+ struct scatterlist *in_sg = areq->src;
+ struct scatterlist *out_sg = areq->dst;
+ struct scatterlist *sg;
+
+ if (areq->cryptlen == 0 || areq->cryptlen % 16) {
+ ce->fallback_mod16++;
+ return true;
+ }
+
+ /*
+ * check if we have enough descriptors for TX
+ * Note: TX need one control desc for each SG
+ */
+ if (sg_nents(areq->src) > MAXDESC / 2) {
+ ce->fallback_sg_count_tx++;
+ return true;
+ }
+ /* check if we have enough descriptors for RX */
+ if (sg_nents(areq->dst) > MAXDESC) {
+ ce->fallback_sg_count_rx++;
+ return true;
+ }
+
+ sg = areq->src;
+ while (sg) {
+ if ((sg->length % 16) != 0) {
+ ce->fallback_mod16++;
+ return true;
+ }
+ if ((sg_dma_len(sg) % 16) != 0) {
+ ce->fallback_mod16++;
+ return true;
+ }
+ if (!IS_ALIGNED(sg->offset, 16)) {
+ ce->fallback_align16++;
+ return true;
+ }
+ sg = sg_next(sg);
+ }
+ sg = areq->dst;
+ while (sg) {
+ if ((sg->length % 16) != 0) {
+ ce->fallback_mod16++;
+ return true;
+ }
+ if ((sg_dma_len(sg) % 16) != 0) {
+ ce->fallback_mod16++;
+ return true;
+ }
+ if (!IS_ALIGNED(sg->offset, 16)) {
+ ce->fallback_align16++;
+ return true;
+ }
+ sg = sg_next(sg);
+ }
+
+ /* need same numbers of SG (with same length) for source and destination */
+ in_sg = areq->src;
+ out_sg = areq->dst;
+ while (in_sg && out_sg) {
+ if (in_sg->length != out_sg->length) {
+ ce->fallback_not_same_len++;
+ return true;
+ }
+ in_sg = sg_next(in_sg);
+ out_sg = sg_next(out_sg);
+ }
+ if (in_sg || out_sg)
+ return true;
+
+ return false;
+}
+
+static int sl3516_ce_cipher_fallback(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sl3516_ce_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sl3516_ce_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
+ struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
+ struct sl3516_ce_alg_template *algt;
+ int err;
+
+ algt = container_of(alg, struct sl3516_ce_alg_template, alg.skcipher);
+ algt->stat_fb++;
+
+ skcipher_request_set_tfm(&rctx->fallback_req, op->fallback_tfm);
+ skcipher_request_set_callback(&rctx->fallback_req, areq->base.flags,
+ areq->base.complete, areq->base.data);
+ skcipher_request_set_crypt(&rctx->fallback_req, areq->src, areq->dst,
+ areq->cryptlen, areq->iv);
+ if (rctx->op_dir == CE_DECRYPTION)
+ err = crypto_skcipher_decrypt(&rctx->fallback_req);
+ else
+ err = crypto_skcipher_encrypt(&rctx->fallback_req);
+ return err;
+}
+
+static int sl3516_ce_cipher(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sl3516_ce_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sl3516_ce_dev *ce = op->ce;
+ struct sl3516_ce_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
+ struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
+ struct sl3516_ce_alg_template *algt;
+ struct scatterlist *sg;
+ unsigned int todo, len;
+ struct pkt_control_ecb *ecb;
+ int nr_sgs = 0;
+ int nr_sgd = 0;
+ int err = 0;
+ int i;
+
+ algt = container_of(alg, struct sl3516_ce_alg_template, alg.skcipher);
+
+ dev_dbg(ce->dev, "%s %s %u %x IV(%p %u) key=%u\n", __func__,
+ crypto_tfm_alg_name(areq->base.tfm),
+ areq->cryptlen,
+ rctx->op_dir, areq->iv, crypto_skcipher_ivsize(tfm),
+ op->keylen);
+
+ algt->stat_req++;
+
+ if (areq->src == areq->dst) {
+ nr_sgs = dma_map_sg(ce->dev, areq->src, sg_nents(areq->src),
+ DMA_BIDIRECTIONAL);
+ if (nr_sgs <= 0 || nr_sgs > MAXDESC / 2) {
+ dev_err(ce->dev, "Invalid sg number %d\n", nr_sgs);
+ err = -EINVAL;
+ goto theend;
+ }
+ nr_sgd = nr_sgs;
+ } else {
+ nr_sgs = dma_map_sg(ce->dev, areq->src, sg_nents(areq->src),
+ DMA_TO_DEVICE);
+ if (nr_sgs <= 0 || nr_sgs > MAXDESC / 2) {
+ dev_err(ce->dev, "Invalid sg number %d\n", nr_sgs);
+ err = -EINVAL;
+ goto theend;
+ }
+ nr_sgd = dma_map_sg(ce->dev, areq->dst, sg_nents(areq->dst),
+ DMA_FROM_DEVICE);
+ if (nr_sgd <= 0 || nr_sgd > MAXDESC) {
+ dev_err(ce->dev, "Invalid sg number %d\n", nr_sgd);
+ err = -EINVAL;
+ goto theend_sgs;
+ }
+ }
+
+ len = areq->cryptlen;
+ i = 0;
+ sg = areq->src;
+ while (i < nr_sgs && sg && len) {
+ if (sg_dma_len(sg) == 0)
+ goto sgs_next;
+ rctx->t_src[i].addr = sg_dma_address(sg);
+ todo = min(len, sg_dma_len(sg));
+ rctx->t_src[i].len = todo;
+ dev_dbg(ce->dev, "%s total=%u SGS(%d %u off=%d) todo=%u\n", __func__,
+ areq->cryptlen, i, rctx->t_src[i].len, sg->offset, todo);
+ len -= todo;
+ i++;
+sgs_next:
+ sg = sg_next(sg);
+ }
+ if (len > 0) {
+ dev_err(ce->dev, "remaining len %d/%u nr_sgs=%d\n", len, areq->cryptlen, nr_sgs);
+ err = -EINVAL;
+ goto theend_sgs;
+ }
+
+ len = areq->cryptlen;
+ i = 0;
+ sg = areq->dst;
+ while (i < nr_sgd && sg && len) {
+ if (sg_dma_len(sg) == 0)
+ goto sgd_next;
+ rctx->t_dst[i].addr = sg_dma_address(sg);
+ todo = min(len, sg_dma_len(sg));
+ rctx->t_dst[i].len = todo;
+ dev_dbg(ce->dev, "%s total=%u SGD(%d %u off=%d) todo=%u\n", __func__,
+ areq->cryptlen, i, rctx->t_dst[i].len, sg->offset, todo);
+ len -= todo;
+ i++;
+
+sgd_next:
+ sg = sg_next(sg);
+ }
+ if (len > 0) {
+ dev_err(ce->dev, "remaining len %d\n", len);
+ err = -EINVAL;
+ goto theend_sgs;
+ }
+
+ switch (algt->mode) {
+ case ECB_AES:
+ rctx->pctrllen = sizeof(struct pkt_control_ecb);
+ ecb = (struct pkt_control_ecb *)ce->pctrl;
+
+ rctx->tqflag = TQ0_TYPE_CTRL;
+ rctx->tqflag |= TQ1_CIPHER;
+ ecb->control.op_mode = rctx->op_dir;
+ ecb->control.cipher_algorithm = ECB_AES;
+ ecb->cipher.header_len = 0;
+ ecb->cipher.algorithm_len = areq->cryptlen;
+ cpu_to_be32_array((__be32 *)ecb->key, (u32 *)op->key, op->keylen / 4);
+ rctx->h = &ecb->cipher;
+
+ rctx->tqflag |= TQ4_KEY0;
+ rctx->tqflag |= TQ5_KEY4;
+ rctx->tqflag |= TQ6_KEY6;
+ ecb->control.aesnk = op->keylen / 4;
+ break;
+ }
+
+ rctx->nr_sgs = nr_sgs;
+ rctx->nr_sgd = nr_sgd;
+ err = sl3516_ce_run_task(ce, rctx, crypto_tfm_alg_name(areq->base.tfm));
+
+theend_sgs:
+ if (areq->src == areq->dst) {
+ dma_unmap_sg(ce->dev, areq->src, sg_nents(areq->src),
+ DMA_BIDIRECTIONAL);
+ } else {
+ dma_unmap_sg(ce->dev, areq->src, sg_nents(areq->src),
+ DMA_TO_DEVICE);
+ dma_unmap_sg(ce->dev, areq->dst, sg_nents(areq->dst),
+ DMA_FROM_DEVICE);
+ }
+
+theend:
+
+ return err;
+}
+
+static int sl3516_ce_handle_cipher_request(struct crypto_engine *engine, void *areq)
+{
+ int err;
+ struct skcipher_request *breq = container_of(areq, struct skcipher_request, base);
+
+ err = sl3516_ce_cipher(breq);
+ crypto_finalize_skcipher_request(engine, breq, err);
+
+ return 0;
+}
+
+int sl3516_ce_skdecrypt(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sl3516_ce_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sl3516_ce_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
+ struct crypto_engine *engine;
+
+ memset(rctx, 0, sizeof(struct sl3516_ce_cipher_req_ctx));
+ rctx->op_dir = CE_DECRYPTION;
+
+ if (sl3516_ce_need_fallback(areq))
+ return sl3516_ce_cipher_fallback(areq);
+
+ engine = op->ce->engine;
+
+ return crypto_transfer_skcipher_request_to_engine(engine, areq);
+}
+
+int sl3516_ce_skencrypt(struct skcipher_request *areq)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq);
+ struct sl3516_ce_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sl3516_ce_cipher_req_ctx *rctx = skcipher_request_ctx(areq);
+ struct crypto_engine *engine;
+
+ memset(rctx, 0, sizeof(struct sl3516_ce_cipher_req_ctx));
+ rctx->op_dir = CE_ENCRYPTION;
+
+ if (sl3516_ce_need_fallback(areq))
+ return sl3516_ce_cipher_fallback(areq);
+
+ engine = op->ce->engine;
+
+ return crypto_transfer_skcipher_request_to_engine(engine, areq);
+}
+
+int sl3516_ce_cipher_init(struct crypto_tfm *tfm)
+{
+ struct sl3516_ce_cipher_tfm_ctx *op = crypto_tfm_ctx(tfm);
+ struct sl3516_ce_alg_template *algt;
+ const char *name = crypto_tfm_alg_name(tfm);
+ struct crypto_skcipher *sktfm = __crypto_skcipher_cast(tfm);
+ struct skcipher_alg *alg = crypto_skcipher_alg(sktfm);
+ int err;
+
+ memset(op, 0, sizeof(struct sl3516_ce_cipher_tfm_ctx));
+
+ algt = container_of(alg, struct sl3516_ce_alg_template, alg.skcipher);
+ op->ce = algt->ce;
+
+ op->fallback_tfm = crypto_alloc_skcipher(name, 0, CRYPTO_ALG_NEED_FALLBACK);
+ if (IS_ERR(op->fallback_tfm)) {
+ dev_err(op->ce->dev, "ERROR: Cannot allocate fallback for %s %ld\n",
+ name, PTR_ERR(op->fallback_tfm));
+ return PTR_ERR(op->fallback_tfm);
+ }
+
+ sktfm->reqsize = sizeof(struct sl3516_ce_cipher_req_ctx) +
+ crypto_skcipher_reqsize(op->fallback_tfm);
+
+ dev_info(op->ce->dev, "Fallback for %s is %s\n",
+ crypto_tfm_alg_driver_name(&sktfm->base),
+ crypto_tfm_alg_driver_name(crypto_skcipher_tfm(op->fallback_tfm)));
+
+ op->enginectx.op.do_one_request = sl3516_ce_handle_cipher_request;
+ op->enginectx.op.prepare_request = NULL;
+ op->enginectx.op.unprepare_request = NULL;
+
+ err = pm_runtime_get_sync(op->ce->dev);
+ if (err < 0)
+ goto error_pm;
+
+ return 0;
+error_pm:
+ pm_runtime_put_noidle(op->ce->dev);
+ crypto_free_skcipher(op->fallback_tfm);
+ return err;
+}
+
+void sl3516_ce_cipher_exit(struct crypto_tfm *tfm)
+{
+ struct sl3516_ce_cipher_tfm_ctx *op = crypto_tfm_ctx(tfm);
+
+ kfree_sensitive(op->key);
+ crypto_free_skcipher(op->fallback_tfm);
+ pm_runtime_put_sync_suspend(op->ce->dev);
+}
+
+int sl3516_ce_aes_setkey(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct sl3516_ce_cipher_tfm_ctx *op = crypto_skcipher_ctx(tfm);
+ struct sl3516_ce_dev *ce = op->ce;
+
+ switch (keylen) {
+ case 128 / 8:
+ break;
+ case 192 / 8:
+ break;
+ case 256 / 8:
+ break;
+ default:
+ dev_dbg(ce->dev, "ERROR: Invalid keylen %u\n", keylen);
+ return -EINVAL;
+ }
+ kfree_sensitive(op->key);
+ op->keylen = keylen;
+ op->key = kmemdup(key, keylen, GFP_KERNEL | GFP_DMA);
+ if (!op->key)
+ return -ENOMEM;
+
+ 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/gemini/sl3516-ce-core.c b/drivers/crypto/gemini/sl3516-ce-core.c
new file mode 100644
index 000000000000..9fa1b366ca8a
--- /dev/null
+++ b/drivers/crypto/gemini/sl3516-ce-core.c
@@ -0,0 +1,535 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * sl3516-ce-core.c - hardware cryptographic offloader for Stormlink SL3516 SoC
+ *
+ * Copyright (C) 2021 Corentin Labbe <clabbe@...libre.com>
+ *
+ * Core file which registers crypto algorithms supported by the CryptoEngine
+ */
+#include <linux/clk.h>
+#include <linux/crypto.h>
+#include <linux/debugfs.h>
+#include <linux/dev_printk.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+#include <crypto/internal/rng.h>
+#include <crypto/internal/skcipher.h>
+
+#include "sl3516-ce.h"
+
+static int sl3516_ce_desc_init(struct sl3516_ce_dev *ce)
+{
+ const size_t sz = sizeof(struct descriptor) * MAXDESC;
+ int i;
+
+ ce->tx = dma_alloc_coherent(ce->dev, sz, &ce->dtx, GFP_KERNEL);
+ if (!ce->tx)
+ return -ENOMEM;
+ ce->rx = dma_alloc_coherent(ce->dev, sz, &ce->drx, GFP_KERNEL);
+ if (!ce->rx)
+ goto err_rx;
+
+ for (i = 0; i < MAXDESC; i++) {
+ ce->tx[i].frame_ctrl.bits.own = CE_CPU;
+ ce->tx[i].next_desc.next_descriptor = ce->dtx + (i + 1) * sizeof(struct descriptor);
+ }
+ ce->tx[MAXDESC - 1].next_desc.next_descriptor = ce->dtx;
+
+ for (i = 0; i < MAXDESC; i++) {
+ ce->rx[i].frame_ctrl.bits.own = CE_CPU;
+ ce->rx[i].next_desc.next_descriptor = ce->drx + (i + 1) * sizeof(struct descriptor);
+ }
+ ce->rx[MAXDESC - 1].next_desc.next_descriptor = ce->drx;
+
+ ce->pctrl = dma_alloc_coherent(ce->dev, sizeof(struct pkt_control_ecb),
+ &ce->dctrl, GFP_KERNEL);
+ if (!ce->pctrl)
+ goto err_pctrl;
+
+ return 0;
+err_pctrl:
+ dma_free_coherent(ce->dev, sz, ce->rx, ce->drx);
+err_rx:
+ dma_free_coherent(ce->dev, sz, ce->tx, ce->dtx);
+ return -ENOMEM;
+}
+
+static void sl3516_ce_free_descs(struct sl3516_ce_dev *ce)
+{
+ const size_t sz = sizeof(struct descriptor) * MAXDESC;
+
+ dma_free_coherent(ce->dev, sz, ce->tx, ce->dtx);
+ dma_free_coherent(ce->dev, sz, ce->rx, ce->drx);
+ dma_free_coherent(ce->dev, sizeof(struct pkt_control_ecb), ce->pctrl,
+ ce->dctrl);
+}
+
+static void start_dma_tx(struct sl3516_ce_dev *ce)
+{
+ u32 v;
+
+ v = TXDMA_CTRL_START | TXDMA_CTRL_CHAIN_MODE | TXDMA_CTRL_CONTINUE | \
+ TXDMA_CTRL_INT_FAIL | TXDMA_CTRL_INT_PERR | TXDMA_CTRL_BURST_UNK;
+
+ writel(v, ce->base + IPSEC_TXDMA_CTRL);
+}
+
+static void start_dma_rx(struct sl3516_ce_dev *ce)
+{
+ u32 v;
+
+ v = RXDMA_CTRL_START | RXDMA_CTRL_CHAIN_MODE | RXDMA_CTRL_CONTINUE | \
+ RXDMA_CTRL_BURST_UNK | RXDMA_CTRL_INT_FINISH | \
+ RXDMA_CTRL_INT_FAIL | RXDMA_CTRL_INT_PERR | \
+ RXDMA_CTRL_INT_EOD | RXDMA_CTRL_INT_EOF;
+
+ writel(v, ce->base + IPSEC_RXDMA_CTRL);
+}
+
+static struct descriptor *get_desc_tx(struct sl3516_ce_dev *ce)
+{
+ struct descriptor *dd;
+
+ dd = &ce->tx[ce->ctx];
+ ce->ctx++;
+ if (ce->ctx >= MAXDESC)
+ ce->ctx = 0;
+ return dd;
+}
+
+static struct descriptor *get_desc_rx(struct sl3516_ce_dev *ce)
+{
+ struct descriptor *rdd;
+
+ rdd = &ce->rx[ce->crx];
+ ce->crx++;
+ if (ce->crx >= MAXDESC)
+ ce->crx = 0;
+ return rdd;
+}
+
+int sl3516_ce_run_task(struct sl3516_ce_dev *ce, struct sl3516_ce_cipher_req_ctx *rctx,
+ const char *name)
+{
+ struct descriptor *dd, *rdd = NULL;
+ u32 v;
+ int i, err = 0;
+
+ ce->stat_req++;
+
+ reinit_completion(&ce->complete);
+ ce->status = 0;
+
+ for (i = 0; i < rctx->nr_sgd; i++) {
+ dev_dbg(ce->dev, "%s handle DST SG %d/%d len=%d\n", __func__,
+ i, rctx->nr_sgd, rctx->t_dst[i].len);
+ rdd = get_desc_rx(ce);
+ rdd->buf_adr = rctx->t_dst[i].addr;
+ rdd->frame_ctrl.bits.buffer_size = rctx->t_dst[i].len;
+ rdd->frame_ctrl.bits.own = CE_DMA;
+ }
+ rdd->next_desc.bits.eofie = 1;
+
+ for (i = 0; i < rctx->nr_sgs; i++) {
+ dev_dbg(ce->dev, "%s handle SRC SG %d/%d len=%d\n", __func__,
+ i, rctx->nr_sgs, rctx->t_src[i].len);
+ rctx->h->algorithm_len = rctx->t_src[i].len;
+
+ dd = get_desc_tx(ce);
+ dd->frame_ctrl.raw = 0;
+ dd->flag_status.raw = 0;
+ dd->frame_ctrl.bits.buffer_size = rctx->pctrllen;
+ dd->buf_adr = ce->dctrl;
+ dd->flag_status.tx_flag.tqflag = rctx->tqflag;
+ dd->next_desc.bits.eofie = 0;
+ dd->next_desc.bits.dec = 0;
+ dd->next_desc.bits.sof_eof = DESC_FIRST | DESC_LAST;
+ dd->frame_ctrl.bits.own = CE_DMA;
+
+ dd = get_desc_tx(ce);
+ dd->frame_ctrl.raw = 0;
+ dd->flag_status.raw = 0;
+ dd->frame_ctrl.bits.buffer_size = rctx->t_src[i].len;
+ dd->buf_adr = rctx->t_src[i].addr;
+ dd->flag_status.tx_flag.tqflag = 0;
+ dd->next_desc.bits.eofie = 0;
+ dd->next_desc.bits.dec = 0;
+ dd->next_desc.bits.sof_eof = DESC_FIRST | DESC_LAST;
+ dd->frame_ctrl.bits.own = CE_DMA;
+ start_dma_tx(ce);
+ start_dma_rx(ce);
+ }
+ wait_for_completion_interruptible_timeout(&ce->complete,
+ msecs_to_jiffies(5000));
+ if (ce->status == 0) {
+ dev_err(ce->dev, "DMA timeout for %s\n", name);
+ err = -EFAULT;
+ }
+ v = readl(ce->base + IPSEC_STATUS_REG);
+ if (v & 0xFFF) {
+ dev_err(ce->dev, "IPSEC_STATUS_REG %x\n", v);
+ err = -EFAULT;
+ }
+
+ return err;
+}
+
+static irqreturn_t ce_irq_handler(int irq, void *data)
+{
+ struct sl3516_ce_dev *ce = (struct sl3516_ce_dev *)data;
+ u32 v;
+
+ ce->stat_irq++;
+
+ v = readl(ce->base + IPSEC_DMA_STATUS);
+ writel(v, ce->base + IPSEC_DMA_STATUS);
+
+ if (v & DMA_STATUS_TS_DERR)
+ dev_err(ce->dev, "AHB bus Error While Tx !!!\n");
+ if (v & DMA_STATUS_TS_PERR)
+ dev_err(ce->dev, "Tx Descriptor Protocol Error !!!\n");
+ if (v & DMA_STATUS_RS_DERR)
+ dev_err(ce->dev, "AHB bus Error While Rx !!!\n");
+ if (v & DMA_STATUS_RS_PERR)
+ dev_err(ce->dev, "Rx Descriptor Protocol Error !!!\n");
+
+ if (v & DMA_STATUS_TS_EOFI)
+ ce->stat_irq_tx++;
+ if (v & DMA_STATUS_RS_EOFI) {
+ ce->status = 1;
+ complete(&ce->complete);
+ ce->stat_irq_rx++;
+ return IRQ_HANDLED;
+ }
+
+ return IRQ_HANDLED;
+}
+
+static struct sl3516_ce_alg_template ce_algs[] = {
+{
+ .type = CRYPTO_ALG_TYPE_SKCIPHER,
+ .mode = ECB_AES,
+ .alg.skcipher = {
+ .base = {
+ .cra_name = "ecb(aes)",
+ .cra_driver_name = "ecb-aes-sl3516",
+ .cra_priority = 400,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_flags = CRYPTO_ALG_TYPE_SKCIPHER |
+ CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK,
+ .cra_ctxsize = sizeof(struct sl3516_ce_cipher_tfm_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_alignmask = 0xf,
+ .cra_init = sl3516_ce_cipher_init,
+ .cra_exit = sl3516_ce_cipher_exit,
+ },
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = sl3516_ce_aes_setkey,
+ .encrypt = sl3516_ce_skencrypt,
+ .decrypt = sl3516_ce_skdecrypt,
+ }
+},
+};
+
+#ifdef CONFIG_CRYPTO_DEV_SL3516_DEBUG
+static int sl3516_ce_debugfs_show(struct seq_file *seq, void *v)
+{
+ struct sl3516_ce_dev *ce = seq->private;
+ unsigned int i;
+
+ seq_printf(seq, "HWRNG %lu %lu\n",
+ ce->hwrng_stat_req, ce->hwrng_stat_bytes);
+ seq_printf(seq, "IRQ %lu\n", ce->stat_irq);
+ seq_printf(seq, "IRQ TX %lu\n", ce->stat_irq_tx);
+ seq_printf(seq, "IRQ RX %lu\n", ce->stat_irq_rx);
+ seq_printf(seq, "nreq %lu\n", ce->stat_req);
+ seq_printf(seq, "fallback SG count TX %lu\n", ce->fallback_sg_count_tx);
+ seq_printf(seq, "fallback SG count RX %lu\n", ce->fallback_sg_count_rx);
+ seq_printf(seq, "fallback modulo16 %lu\n", ce->fallback_mod16);
+ seq_printf(seq, "fallback align16 %lu\n", ce->fallback_align16);
+ seq_printf(seq, "fallback not same len %lu\n", ce->fallback_not_same_len);
+
+ for (i = 0; i < ARRAY_SIZE(ce_algs); i++) {
+ if (!ce_algs[i].ce)
+ continue;
+ switch (ce_algs[i].type) {
+ case CRYPTO_ALG_TYPE_SKCIPHER:
+ seq_printf(seq, "%s %s reqs=%lu fallback=%lu\n",
+ ce_algs[i].alg.skcipher.base.cra_driver_name,
+ ce_algs[i].alg.skcipher.base.cra_name,
+ ce_algs[i].stat_req, ce_algs[i].stat_fb);
+ break;
+ }
+ }
+ return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(sl3516_ce_debugfs);
+#endif
+
+static int sl3516_ce_register_algs(struct sl3516_ce_dev *ce)
+{
+ int err;
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(ce_algs); i++) {
+ ce_algs[i].ce = ce;
+ switch (ce_algs[i].type) {
+ case CRYPTO_ALG_TYPE_SKCIPHER:
+ dev_info(ce->dev, "DEBUG: Register %s\n",
+ ce_algs[i].alg.skcipher.base.cra_name);
+ err = crypto_register_skcipher(&ce_algs[i].alg.skcipher);
+ if (err) {
+ dev_err(ce->dev, "Fail to register %s\n",
+ ce_algs[i].alg.skcipher.base.cra_name);
+ ce_algs[i].ce = NULL;
+ return err;
+ }
+ break;
+ default:
+ ce_algs[i].ce = NULL;
+ dev_err(ce->dev, "ERROR: tried to register an unknown algo\n");
+ }
+ }
+ return 0;
+}
+
+static void sl3516_ce_unregister_algs(struct sl3516_ce_dev *ce)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(ce_algs); i++) {
+ if (!ce_algs[i].ce)
+ continue;
+ switch (ce_algs[i].type) {
+ case CRYPTO_ALG_TYPE_SKCIPHER:
+ dev_info(ce->dev, "Unregister %d %s\n", i,
+ ce_algs[i].alg.skcipher.base.cra_name);
+ crypto_unregister_skcipher(&ce_algs[i].alg.skcipher);
+ break;
+ }
+ }
+}
+
+static void sl3516_ce_start(struct sl3516_ce_dev *ce)
+{
+ ce->ctx = 0;
+ ce->crx = 0;
+ writel(ce->dtx, ce->base + IPSEC_TXDMA_CURR_DESC);
+ writel(ce->drx, ce->base + IPSEC_RXDMA_CURR_DESC);
+ writel(0, ce->base + IPSEC_DMA_STATUS);
+}
+
+/*
+ * Power management strategy: The device is suspended unless a TFM exists for
+ * one of the algorithms proposed by this driver.
+ */
+static int sl3516_ce_pm_suspend(struct device *dev)
+{
+ struct sl3516_ce_dev *ce = dev_get_drvdata(dev);
+
+ reset_control_assert(ce->reset);
+ clk_disable_unprepare(ce->clks);
+ return 0;
+}
+
+static int sl3516_ce_pm_resume(struct device *dev)
+{
+ struct sl3516_ce_dev *ce = dev_get_drvdata(dev);
+ int err;
+
+ err = clk_prepare_enable(ce->clks);
+ if (err) {
+ dev_err(ce->dev, "Cannot prepare_enable\n");
+ goto error;
+ }
+ err = reset_control_deassert(ce->reset);
+ if (err) {
+ dev_err(ce->dev, "Cannot deassert reset control\n");
+ goto error;
+ }
+
+ sl3516_ce_start(ce);
+
+ return 0;
+error:
+ sl3516_ce_pm_suspend(dev);
+ return err;
+}
+
+static const struct dev_pm_ops sl3516_ce_pm_ops = {
+ SET_RUNTIME_PM_OPS(sl3516_ce_pm_suspend, sl3516_ce_pm_resume, NULL)
+};
+
+static int sl3516_ce_pm_init(struct sl3516_ce_dev *ce)
+{
+ int err;
+
+ pm_runtime_use_autosuspend(ce->dev);
+ pm_runtime_set_autosuspend_delay(ce->dev, 2000);
+
+ err = pm_runtime_set_suspended(ce->dev);
+ if (err)
+ return err;
+ pm_runtime_enable(ce->dev);
+ return err;
+}
+
+static void sl3516_ce_pm_exit(struct sl3516_ce_dev *ce)
+{
+ pm_runtime_disable(ce->dev);
+}
+
+static int sl3516_ce_probe(struct platform_device *pdev)
+{
+ struct sl3516_ce_dev *ce;
+ int err, irq;
+ u32 v;
+
+ ce = devm_kzalloc(&pdev->dev, sizeof(*ce), GFP_KERNEL);
+ if (!ce)
+ return -ENOMEM;
+
+ ce->dev = &pdev->dev;
+ platform_set_drvdata(pdev, ce);
+
+ ce->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(ce->base))
+ return PTR_ERR(ce->base);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ err = devm_request_irq(&pdev->dev, irq, ce_irq_handler, 0, "crypto", ce);
+ if (err) {
+ dev_err(ce->dev, "Cannot request Crypto Engine IRQ (err=%d)\n", err);
+ return err;
+ }
+
+ ce->reset = devm_reset_control_get(&pdev->dev, NULL);
+ if (IS_ERR(ce->reset))
+ return dev_err_probe(&pdev->dev, PTR_ERR(ce->reset),
+ "No reset control found\n");
+ ce->clks = devm_clk_get(ce->dev, NULL);
+ if (IS_ERR(ce->clks)) {
+ err = PTR_ERR(ce->clks);
+ dev_err(ce->dev, "Cannot get clock err=%d\n", err);
+ return err;
+ }
+
+ err = sl3516_ce_desc_init(ce);
+ if (err)
+ return err;
+
+ err = sl3516_ce_pm_init(ce);
+ if (err)
+ goto error_pm;
+
+ init_completion(&ce->complete);
+
+ ce->engine = crypto_engine_alloc_init(ce->dev, true);
+ if (!ce->engine) {
+ dev_err(ce->dev, "Cannot allocate engine\n");
+ err = -ENOMEM;
+ goto error_engine;
+ }
+
+ err = crypto_engine_start(ce->engine);
+ if (err) {
+ dev_err(ce->dev, "Cannot start engine\n");
+ goto error_engine;
+ }
+
+ err = sl3516_ce_register_algs(ce);
+ if (err)
+ goto error_alg;
+
+ err = sl3516_ce_rng_register(ce);
+ if (err)
+ goto error_rng;
+
+ err = pm_runtime_resume_and_get(ce->dev);
+ if (err < 0)
+ goto error_pmuse;
+
+ v = readl(ce->base + IPSEC_ID);
+ dev_info(ce->dev, "SL3516 dev %lx rev %lx\n",
+ v & GENMASK(31, 4),
+ v & GENMASK(3, 0));
+ v = readl(ce->base + IPSEC_DMA_DEVICE_ID);
+ dev_info(ce->dev, "SL3516 DMA dev %lx rev %lx\n",
+ v & GENMASK(15, 4),
+ v & GENMASK(3, 0));
+
+ pm_runtime_put_sync(ce->dev);
+
+#ifdef CONFIG_CRYPTO_DEV_SL3516_DEBUG
+ /* Ignore error of debugfs */
+ ce->dbgfs_dir = debugfs_create_dir("sl3516", NULL);
+ ce->dbgfs_stats = debugfs_create_file("stats", 0444,
+ ce->dbgfs_dir, ce,
+ &sl3516_ce_debugfs_fops);
+#endif
+
+ return 0;
+error_pmuse:
+ sl3516_ce_rng_unregister(ce);
+error_rng:
+ sl3516_ce_unregister_algs(ce);
+error_alg:
+ crypto_engine_exit(ce->engine);
+error_engine:
+ sl3516_ce_pm_exit(ce);
+error_pm:
+ sl3516_ce_free_descs(ce);
+ return err;
+}
+
+static int sl3516_ce_remove(struct platform_device *pdev)
+{
+ struct sl3516_ce_dev *ce = platform_get_drvdata(pdev);
+
+ sl3516_ce_rng_unregister(ce);
+ sl3516_ce_unregister_algs(ce);
+ crypto_engine_exit(ce->engine);
+ sl3516_ce_pm_exit(ce);
+ sl3516_ce_free_descs(ce);
+
+#ifdef CONFIG_CRYPTO_DEV_SL3516_DEBUG
+ debugfs_remove_recursive(ce->dbgfs_dir);
+#endif
+
+ return 0;
+}
+
+static const struct of_device_id sl3516_ce_crypto_of_match_table[] = {
+ { .compatible = "cortina,sl3516-crypto"},
+ {}
+};
+MODULE_DEVICE_TABLE(of, sl3516_ce_crypto_of_match_table);
+
+static struct platform_driver sl3516_ce_driver = {
+ .probe = sl3516_ce_probe,
+ .remove = sl3516_ce_remove,
+ .driver = {
+ .name = "sl3516-crypto",
+ .pm = &sl3516_ce_pm_ops,
+ .of_match_table = sl3516_ce_crypto_of_match_table,
+ },
+};
+
+module_platform_driver(sl3516_ce_driver);
+
+MODULE_DESCRIPTION("SL3516 cryptographic offloader");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Corentin Labbe <clabbe@...libre.com>");
diff --git a/drivers/crypto/gemini/sl3516-ce-rng.c b/drivers/crypto/gemini/sl3516-ce-rng.c
new file mode 100644
index 000000000000..76931ec1cec5
--- /dev/null
+++ b/drivers/crypto/gemini/sl3516-ce-rng.c
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * sl3516-ce-rng.c - hardware cryptographic offloader for SL3516 SoC.
+ *
+ * Copyright (C) 2021 Corentin Labbe <clabbe@...libre.com>
+ *
+ * This file handle the RNG found in the SL3516 crypto engine
+ */
+#include "sl3516-ce.h"
+#include <linux/pm_runtime.h>
+#include <linux/hw_random.h>
+
+static int sl3516_ce_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
+{
+ struct sl3516_ce_dev *ce;
+ u32 *data = buf;
+ size_t read = 0;
+ int err;
+
+ ce = container_of(rng, struct sl3516_ce_dev, trng);
+
+#ifdef CONFIG_CRYPTO_DEV_SL3516_DEBUG
+ ce->hwrng_stat_req++;
+ ce->hwrng_stat_bytes += max;
+#endif
+
+ err = pm_runtime_get_sync(ce->dev);
+ if (err < 0) {
+ pm_runtime_put_noidle(ce->dev);
+ return err;
+ }
+
+ while (read < max) {
+ *data = readl(ce->base + IPSEC_RAND_NUM_REG);
+ data++;
+ read += 4;
+ }
+
+ pm_runtime_put(ce->dev);
+
+ return read;
+}
+
+int sl3516_ce_rng_register(struct sl3516_ce_dev *ce)
+{
+ int ret;
+
+ ce->trng.name = "SL3516 Crypto Engine RNG";
+ ce->trng.read = sl3516_ce_rng_read;
+ ce->trng.quality = 700;
+
+ ret = hwrng_register(&ce->trng);
+ if (ret)
+ dev_err(ce->dev, "Fail to register the RNG\n");
+ return ret;
+}
+
+void sl3516_ce_rng_unregister(struct sl3516_ce_dev *ce)
+{
+ hwrng_unregister(&ce->trng);
+}
diff --git a/drivers/crypto/gemini/sl3516-ce.h b/drivers/crypto/gemini/sl3516-ce.h
new file mode 100644
index 000000000000..911309b81e10
--- /dev/null
+++ b/drivers/crypto/gemini/sl3516-ce.h
@@ -0,0 +1,349 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * sl3516-ce.h - hardware cryptographic offloader for cortina/gemini SoC
+ *
+ * Copyright (C) 2021 Corentin LABBE <clabbe@...libre.com>
+ *
+ * General notes on this driver:
+ * Called either Crypto Acceleration Engine Module, Security Acceleration Engine
+ * or IPSEC module in the datasheet, it will be called Crypto Engine for short
+ * in this driver.
+ * The CE was designed to handle IPSEC and wifi(TKIP WEP) protocol.
+ * It can handle AES, DES, 3DES, MD5, WEP, TKIP, SHA1, HMAC(MD5), HMAC(SHA1),
+ * Michael cipher/digest suites.
+ * It acts the same as a network hw, with both RX and TX chained descriptors.
+ */
+#include <crypto/aes.h>
+#include <crypto/engine.h>
+#include <crypto/scatterwalk.h>
+#include <crypto/skcipher.h>
+#include <linux/crypto.h>
+#include <linux/debugfs.h>
+#include <linux/hw_random.h>
+
+#define TQ0_TYPE_DATA 0
+#define TQ0_TYPE_CTRL BIT(0)
+#define TQ1_CIPHER BIT(1)
+#define TQ2_AUTH BIT(2)
+#define TQ3_IV BIT(3)
+#define TQ4_KEY0 BIT(4)
+#define TQ5_KEY4 BIT(5)
+#define TQ6_KEY6 BIT(6)
+#define TQ7_AKEY0 BIT(7)
+#define TQ8_AKEY2 BIT(8)
+#define TQ9_AKEY2 BIT(9)
+
+#define ECB_AES 0x2
+
+#define DESC_LAST 0x01
+#define DESC_FIRST 0x02
+
+#define IPSEC_ID 0x0000
+#define IPSEC_STATUS_REG 0x00a8
+#define IPSEC_RAND_NUM_REG 0x00ac
+#define IPSEC_DMA_DEVICE_ID 0xff00
+#define IPSEC_DMA_STATUS 0xff04
+#define IPSEC_TXDMA_CTRL 0xff08
+#define IPSEC_TXDMA_FIRST_DESC 0xff0c
+#define IPSEC_TXDMA_CURR_DESC 0xff10
+#define IPSEC_RXDMA_CTRL 0xff14
+#define IPSEC_RXDMA_FIRST_DESC 0xff18
+#define IPSEC_RXDMA_CURR_DESC 0xff1c
+#define IPSEC_TXDMA_BUF_ADDR 0xff28
+#define IPSEC_RXDMA_BUF_ADDR 0xff38
+#define IPSEC_RXDMA_BUF_SIZE 0xff30
+
+#define CE_ENCRYPTION 0x01
+#define CE_DECRYPTION 0x03
+
+#define MAXDESC 6
+
+#define DMA_STATUS_RS_EOFI BIT(22)
+#define DMA_STATUS_RS_PERR BIT(24)
+#define DMA_STATUS_RS_DERR BIT(25)
+#define DMA_STATUS_TS_EOFI BIT(27)
+#define DMA_STATUS_TS_PERR BIT(29)
+#define DMA_STATUS_TS_DERR BIT(30)
+
+#define TXDMA_CTRL_START BIT(31)
+#define TXDMA_CTRL_CONTINUE BIT(30)
+#define TXDMA_CTRL_CHAIN_MODE BIT(29)
+/* the burst value is not documented in the datasheet */
+#define TXDMA_CTRL_BURST_UNK BIT(22)
+#define TXDMA_CTRL_INT_FAIL BIT(17)
+#define TXDMA_CTRL_INT_PERR BIT(16)
+
+#define RXDMA_CTRL_START BIT(31)
+#define RXDMA_CTRL_CONTINUE BIT(30)
+#define RXDMA_CTRL_CHAIN_MODE BIT(29)
+/* the burst value is not documented in the datasheet */
+#define RXDMA_CTRL_BURST_UNK BIT(22)
+#define RXDMA_CTRL_INT_FINISH BIT(18)
+#define RXDMA_CTRL_INT_FAIL BIT(17)
+#define RXDMA_CTRL_INT_PERR BIT(16)
+#define RXDMA_CTRL_INT_EOD BIT(15)
+#define RXDMA_CTRL_INT_EOF BIT(14)
+
+#define CE_CPU 0
+#define CE_DMA 1
+
+/*
+ * struct sl3516_ce_descriptor - descriptor for CE operations
+ * @frame_ctrl: Information for the current descriptor
+ * @flag_status: For send packet, describe flag of operations.
+ * @buf_adr: pointer to a send/recv buffer for data packet
+ * @next_desc: control linking to other descriptors
+ */
+struct descriptor {
+ union {
+ u32 raw;
+ /*
+ * struct desc_frame_ctrl - Information for the current descriptor
+ * @buffer_size: the size of buffer at buf_adr
+ * @desc_count: Upon completion of a DMA operation, DMA
+ * write the number of descriptors used
+ * for the current frame
+ * @checksum: unknown
+ * @authcomp: unknown
+ * @perr: Protocol error during processing this descriptor
+ * @derr: Data error during processing this descriptor
+ * @own: 0 if owned by CPU, 1 for DMA
+ */
+ struct desc_frame_ctrl {
+ u32 buffer_size :16;
+ u32 desc_count :6;
+ u32 checksum :6;
+ u32 authcomp :1;
+ u32 perr :1;
+ u32 derr :1;
+ u32 own :1;
+ } bits;
+ } frame_ctrl;
+
+ union {
+ u32 raw;
+ /*
+ * struct desc_flag_status - flag for this descriptor
+ * @tqflag: list of flag describing the type of operation
+ * to be performed.
+ */
+ struct desc_tx_flag_status {
+ u32 tqflag :10;
+ u32 unused :22;
+ } tx_flag;
+ } flag_status;
+
+ u32 buf_adr;
+
+ union {
+ u32 next_descriptor;
+ /*
+ * struct desc_next - describe chaining of descriptors
+ * @sof_eof: does the descriptor is first (0x11),
+ * the last (0x01), middle of a chan (0x00)
+ * or the only one (0x11)
+ * @dec: AHB bus address increase (0), decrease (1)
+ * @eofie: End of frame interrupt enable
+ * @ndar: Next descriptor address
+ */
+ struct desc_next {
+ u32 sof_eof :2;
+ u32 dec :1;
+ u32 eofie :1;
+ u32 ndar :28;
+ } bits;
+ } next_desc;
+};
+
+/*
+ * struct control - The value of this register is used to set the
+ * operation mode of the IPSec Module.
+ * @process_id: Used to identify the process. The number will be copied
+ * to the descriptor status of the received packet.
+ * @auth_check_len: Number of 32-bit words to be checked or appended by the
+ * authentication module
+ * @auth_algorithm:
+ * @auth_mode: 0:append 1:Check Authentication Result
+ * @fcs_stream_copy: 0:enable 1:disable authentication stream copy
+ * @mix_key_sel: 0:use rCipherKey0-3 1:use Key Mixer
+ * @aesnk: AES Key Size
+ * @cipher_algorithm: choice of CBC/ECE and AES/DES/3DES
+ * @op_mode: Operation Mode for the IPSec Module
+ */
+struct pkt_control_header {
+ u32 process_id :8;
+ u32 auth_check_len :3;
+ u32 un1 :1;
+ u32 auth_algorithm :3;
+ u32 auth_mode :1;
+ u32 fcs_stream_copy :1;
+ u32 un2 :2;
+ u32 mix_key_sel :1;
+ u32 aesnk :4;
+ u32 cipher_algorithm :3;
+ u32 un3 :1;
+ u32 op_mode :4;
+};
+
+struct pkt_control_cipher {
+ u32 algorithm_len :16;
+ u32 header_len :16;
+};
+
+/*
+ * struct pkt_control_ecb - control packet for ECB
+ */
+struct pkt_control_ecb {
+ struct pkt_control_header control;
+ struct pkt_control_cipher cipher;
+ unsigned char key[AES_MAX_KEY_SIZE];
+};
+
+/*
+ * struct sl3516_ce_dev - main container for all this driver information
+ * @base: base address
+ * @clks: clocks used
+ * @reset: pointer to reset controller
+ * @dev: the platform device
+ * @engine: ptr to the crypto/crypto_engine
+ * @complete: completion for the current task on this flow
+ * @status: set to 1 by interrupt if task is done
+ * @dtx: base DMA address for TX descriptors
+ * @tx base address of TX descriptors
+ * @drx: base DMA address for RX descriptors
+ * @rx base address of RX descriptors
+ * @ctx current used TX descriptor
+ * @crx current used RX descriptor
+ * @trng hw_random structure for RNG
+ * @hwrng_stat_req number of HWRNG requests
+ * @hwrng_stat_bytes total number of bytes generated by RNG
+ * @stat_irq number of IRQ handled by CE
+ * @stat_irq_tx number of TX IRQ handled by CE
+ * @stat_irq_rx number of RX IRQ handled by CE
+ * @stat_req number of requests handled by CE
+ * @fallbak_sg_count_tx number of fallback due to destination SG count
+ * @fallbak_sg_count_rx number of fallback due to source SG count
+ * @fallbak_not_same_len number of fallback due to difference in SG length
+ * @dbgfs_dir: Debugfs dentry for statistic directory
+ * @dbgfs_stats: Debugfs dentry for statistic counters
+ */
+struct sl3516_ce_dev {
+ void __iomem *base;
+ struct clk *clks;
+ struct reset_control *reset;
+ struct device *dev;
+ struct crypto_engine *engine;
+ struct completion complete;
+ int status;
+ dma_addr_t dtx;
+ struct descriptor *tx;
+ dma_addr_t drx;
+ struct descriptor *rx;
+ int ctx;
+ int crx;
+ struct hwrng trng;
+ unsigned long hwrng_stat_req;
+ unsigned long hwrng_stat_bytes;
+ unsigned long stat_irq;
+ unsigned long stat_irq_tx;
+ unsigned long stat_irq_rx;
+ unsigned long stat_req;
+ unsigned long fallback_sg_count_tx;
+ unsigned long fallback_sg_count_rx;
+ unsigned long fallback_not_same_len;
+ unsigned long fallback_mod16;
+ unsigned long fallback_align16;
+#ifdef CONFIG_CRYPTO_DEV_SL3516_DEBUG
+ struct dentry *dbgfs_dir;
+ struct dentry *dbgfs_stats;
+#endif
+ void *pctrl;
+ dma_addr_t dctrl;
+};
+
+struct sginfo {
+ u32 addr;
+ u32 len;
+};
+
+/*
+ * struct sl3516_ce_cipher_req_ctx - context for a skcipher request
+ * @t_src: list of mapped SGs with their size
+ * @t_dst: list of mapped SGs with their size
+ * @op_dir: direction (encrypt vs decrypt) for this request
+ * @pctrllen: the length of the ctrl packet
+ * @tqflag: the TQflag to set in data packet
+ * @h pointer to the pkt_control_cipher header
+ * @nr_sgs: number of source SG
+ * @nr_sgd: number of destination SG
+ * @fallback_req: request struct for invoking the fallback skcipher TFM
+ */
+struct sl3516_ce_cipher_req_ctx {
+ struct sginfo t_src[MAXDESC];
+ struct sginfo t_dst[MAXDESC];
+ u32 op_dir;
+ unsigned int pctrllen;
+ u32 tqflag;
+ struct pkt_control_cipher *h;
+ int nr_sgs;
+ int nr_sgd;
+ struct skcipher_request fallback_req; // keep at the end
+};
+
+/*
+ * struct sl3516_ce_cipher_tfm_ctx - context for a skcipher TFM
+ * @enginectx: crypto_engine used by this TFM
+ * @key: pointer to key data
+ * @keylen: len of the key
+ * @ce: pointer to the private data of driver handling this TFM
+ * @fallback_tfm: pointer to the fallback TFM
+ *
+ * enginectx must be the first element
+ */
+struct sl3516_ce_cipher_tfm_ctx {
+ struct crypto_engine_ctx enginectx;
+ u32 *key;
+ u32 keylen;
+ struct sl3516_ce_dev *ce;
+ struct crypto_skcipher *fallback_tfm;
+};
+
+/*
+ * struct sl3516_ce_alg_template - crypto_alg template
+ * @type: the CRYPTO_ALG_TYPE for this template
+ * @mode: value to be used in control packet for this algorithm
+ * @ce: pointer to the sl3516_ce_dev structure associated with
+ * this template
+ * @alg: one of sub struct must be used
+ * @stat_req: number of request done on this template
+ * @stat_fb: number of request which has fallbacked
+ * @stat_bytes: total data size done by this template
+ */
+struct sl3516_ce_alg_template {
+ u32 type;
+ u32 mode;
+ struct sl3516_ce_dev *ce;
+ union {
+ struct skcipher_alg skcipher;
+ } alg;
+#ifdef CONFIG_CRYPTO_DEV_SL3516_DEBUG
+ unsigned long stat_req;
+ unsigned long stat_fb;
+ unsigned long stat_bytes;
+#endif
+};
+
+int sl3516_ce_enqueue(struct crypto_async_request *areq, u32 type);
+
+int sl3516_ce_aes_setkey(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int keylen);
+int sl3516_ce_cipher_init(struct crypto_tfm *tfm);
+void sl3516_ce_cipher_exit(struct crypto_tfm *tfm);
+int sl3516_ce_skdecrypt(struct skcipher_request *areq);
+int sl3516_ce_skencrypt(struct skcipher_request *areq);
+
+int sl3516_ce_run_task(struct sl3516_ce_dev *ce,
+ struct sl3516_ce_cipher_req_ctx *rctx, const char *name);
+
+int sl3516_ce_rng_register(struct sl3516_ce_dev *ce);
+void sl3516_ce_rng_unregister(struct sl3516_ce_dev *ce);
--
2.26.3
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