[PATCH v2 03/14] crypto: sun8i-ss: support hash algorithms

Corentin Labbe
2020-04-24T14:02:33Z

The SS support multiples hash algorithms, this patch adds support for
MD5, SHA1, SHA224 and SHA256.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
---
drivers/crypto/allwinner/Kconfig | 9 +
drivers/crypto/allwinner/sun8i-ss/Makefile | 1 +
.../crypto/allwinner/sun8i-ss/sun8i-ss-core.c | 155 ++++++
.../crypto/allwinner/sun8i-ss/sun8i-ss-hash.c | 446 ++++++++++++++++++
drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h | 60 +++
5 files changed, 671 insertions(+)
create mode 100644 drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c

diff --git a/drivers/crypto/allwinner/Kconfig b/drivers/crypto/allwinner/Kconfig
index a0bdb26d0fe4..945228b3a8c4 100644
--- a/drivers/crypto/allwinner/Kconfig
+++ b/drivers/crypto/allwinner/Kconfig
@@ -103,3 +103,12 @@ config CRYPTO_DEV_SUN8I_SS_PRNG
help
Select this option if you want to provide kernel-side support for
the Pseudo-Random Number Generator found in the Security System.
+
+config CRYPTO_DEV_SUN8I_SS_HASH
+ bool "Enable support for hash on sun8i-ss"
+ depends on CRYPTO_DEV_SUN8I_SS
+ select MD5
+ select SHA1
+ select SHA256
+ help
+ Say y to enable support for hash algorithms.
diff --git a/drivers/crypto/allwinner/sun8i-ss/Makefile b/drivers/crypto/allwinner/sun8i-ss/Makefile
index 49f2f912c816..aabfd893c817 100644
--- a/drivers/crypto/allwinner/sun8i-ss/Makefile
+++ b/drivers/crypto/allwinner/sun8i-ss/Makefile
@@ -1,3 +1,4 @@
obj-$(CONFIG_CRYPTO_DEV_SUN8I_SS) += sun8i-ss.o
sun8i-ss-y += sun8i-ss-core.o sun8i-ss-cipher.o
sun8i-ss-$(CONFIG_CRYPTO_DEV_SUN8I_SS_PRNG) += sun8i-ss-prng.o
+sun8i-ss-$(CONFIG_CRYPTO_DEV_SUN8I_SS_HASH) += sun8i-ss-hash.o
diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c
index 592ee35616ba..cd408969bd03 100644
--- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c
@@ -41,6 +41,8 @@ static const struct ss_variant ss_a80_variant = {
static const struct ss_variant ss_a83t_variant = {
.alg_cipher = { SS_ALG_AES, SS_ALG_DES, SS_ALG_3DES,
},
+ .alg_hash = { SS_ALG_MD5, SS_ALG_SHA1, SS_ALG_SHA224, SS_ALG_SHA256,
+ },
.op_mode = { SS_OP_ECB, SS_OP_CBC,
},
.ss_clks = {
@@ -280,6 +282,128 @@ static struct sun8i_ss_alg_template ss_algs[] = {
}
},
#endif
+#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_HASH
+{ .type = CRYPTO_ALG_TYPE_AHASH,
+ .ss_algo_id = SS_ID_HASH_MD5,
+ .alg.hash = {
+ .init = sun8i_ss_hash_init,
+ .update = sun8i_ss_hash_update,
+ .final = sun8i_ss_hash_final,
+ .finup = sun8i_ss_hash_finup,
+ .digest = sun8i_ss_hash_digest,
+ .export = sun8i_ss_hash_export,
+ .import = sun8i_ss_hash_import,
+ .halg = {
+ .digestsize = MD5_DIGEST_SIZE,
+ .statesize = sizeof(struct md5_state),
+ .base = {
+ .cra_name = "md5",
+ .cra_driver_name = "md5-sun8i-ss",
+ .cra_priority = 300,
+ .cra_alignmask = 3,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_NEED_FALLBACK,
+ .cra_blocksize = MD5_HMAC_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct sun8i_ss_hash_tfm_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_init = sun8i_ss_hash_crainit,
+ .cra_exit = sun8i_ss_hash_craexit,
+ }
+ }
+ }
+},
+{ .type = CRYPTO_ALG_TYPE_AHASH,
+ .ss_algo_id = SS_ID_HASH_SHA1,
+ .alg.hash = {
+ .init = sun8i_ss_hash_init,
+ .update = sun8i_ss_hash_update,
+ .final = sun8i_ss_hash_final,
+ .finup = sun8i_ss_hash_finup,
+ .digest = sun8i_ss_hash_digest,
+ .export = sun8i_ss_hash_export,
+ .import = sun8i_ss_hash_import,
+ .halg = {
+ .digestsize = SHA1_DIGEST_SIZE,
+ .statesize = sizeof(struct sha1_state),
+ .base = {
+ .cra_name = "sha1",
+ .cra_driver_name = "sha1-sun8i-ss",
+ .cra_priority = 300,
+ .cra_alignmask = 3,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_NEED_FALLBACK,
+ .cra_blocksize = SHA1_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct sun8i_ss_hash_tfm_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_init = sun8i_ss_hash_crainit,
+ .cra_exit = sun8i_ss_hash_craexit,
+ }
+ }
+ }
+},
+{ .type = CRYPTO_ALG_TYPE_AHASH,
+ .ss_algo_id = SS_ID_HASH_SHA224,
+ .alg.hash = {
+ .init = sun8i_ss_hash_init,
+ .update = sun8i_ss_hash_update,
+ .final = sun8i_ss_hash_final,
+ .finup = sun8i_ss_hash_finup,
+ .digest = sun8i_ss_hash_digest,
+ .export = sun8i_ss_hash_export,
+ .import = sun8i_ss_hash_import,
+ .halg = {
+ .digestsize = SHA224_DIGEST_SIZE,
+ .statesize = sizeof(struct sha256_state),
+ .base = {
+ .cra_name = "sha224",
+ .cra_driver_name = "sha224-sun8i-ss",
+ .cra_priority = 300,
+ .cra_alignmask = 3,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_NEED_FALLBACK,
+ .cra_blocksize = SHA224_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct sun8i_ss_hash_tfm_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_init = sun8i_ss_hash_crainit,
+ .cra_exit = sun8i_ss_hash_craexit,
+ }
+ }
+ }
+},
+{ .type = CRYPTO_ALG_TYPE_AHASH,
+ .ss_algo_id = SS_ID_HASH_SHA256,
+ .alg.hash = {
+ .init = sun8i_ss_hash_init,
+ .update = sun8i_ss_hash_update,
+ .final = sun8i_ss_hash_final,
+ .finup = sun8i_ss_hash_finup,
+ .digest = sun8i_ss_hash_digest,
+ .export = sun8i_ss_hash_export,
+ .import = sun8i_ss_hash_import,
+ .halg = {
+ .digestsize = SHA256_DIGEST_SIZE,
+ .statesize = sizeof(struct sha256_state),
+ .base = {
+ .cra_name = "sha256",
+ .cra_driver_name = "sha256-sun8i-ss",
+ .cra_priority = 300,
+ .cra_alignmask = 3,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_NEED_FALLBACK,
+ .cra_blocksize = SHA256_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct sun8i_ss_hash_tfm_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_init = sun8i_ss_hash_crainit,
+ .cra_exit = sun8i_ss_hash_craexit,
+ }
+ }
+ }
+},
+#endif
};

#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG
@@ -307,6 +431,12 @@ static int sun8i_ss_dbgfs_read(struct seq_file *seq, void *v)
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 %lu %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, ss_algs[i].stat_fb);
+ break;
}
}
return 0;
@@ -478,6 +608,26 @@ static int sun8i_ss_register_algs(struct sun8i_ss_dev *ss)
ss_algs[i].ss = NULL;
}
break;
+ case CRYPTO_ALG_TYPE_AHASH:
+ id = ss_algs[i].ss_algo_id;
+ ss_method = ss->variant->alg_hash[id];
+ if (ss_method == SS_ID_NOTSUPP) {
+ dev_info(ss->dev,
+ "DEBUG: Algo of %s not supported\n",
+ ss_algs[i].alg.hash.halg.base.cra_name);
+ ss_algs[i].ss = NULL;
+ break;
+ }
+ dev_info(ss->dev, "Register %s\n",
+ ss_algs[i].alg.hash.halg.base.cra_name);
+ err = crypto_register_ahash(&ss_algs[i].alg.hash);
+ if (err) {
+ dev_err(ss->dev, "ERROR: Fail to register %s\n",
+ ss_algs[i].alg.hash.halg.base.cra_name);
+ ss_algs[i].ss = NULL;
+ return err;
+ }
+ break;
default:
ss_algs[i].ss = NULL;
dev_err(ss->dev, "ERROR: tried to register an unknown algo\n");
@@ -504,6 +654,11 @@ static void sun8i_ss_unregister_algs(struct sun8i_ss_dev *ss)
ss_algs[i].alg.rng.base.cra_name);
crypto_unregister_rng(&ss_algs[i].alg.rng);
break;
+ case CRYPTO_ALG_TYPE_AHASH:
+ dev_info(ss->dev, "Unregister %d %s\n", i,
+ ss_algs[i].alg.hash.halg.base.cra_name);
+ crypto_unregister_ahash(&ss_algs[i].alg.hash);
+ break;
}
}
}
diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
new file mode 100644
index 000000000000..d89b2ef895f5
--- /dev/null
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
@@ -0,0 +1,446 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * sun8i-ss-hash.c - hardware cryptographic offloader for
+ * Allwinner A80/A83T SoC
+ *
+ * Copyright (C) 2015-2020 Corentin Labbe <clabbe@baylibre.com>
+ *
+ * This file add support for MD5 and SHA1/SHA224/SHA256.
+ *
+ * You could find the datasheet in Documentation/arm/sunxi.rst
+ */
+#include <linux/pm_runtime.h>
+#include <linux/scatterlist.h>
+#include <crypto/internal/hash.h>
+#include <crypto/sha.h>
+#include <crypto/md5.h>
+#include "sun8i-ss.h"
+
+int sun8i_ss_hash_crainit(struct crypto_tfm *tfm)
+{
+ struct sun8i_ss_hash_tfm_ctx *op = crypto_tfm_ctx(tfm);
+ struct ahash_alg *alg = __crypto_ahash_alg(tfm->__crt_alg);
+ struct sun8i_ss_alg_template *algt;
+ int err;
+
+ memset(op, 0, sizeof(struct sun8i_ss_hash_tfm_ctx));
+
+ algt = container_of(alg, struct sun8i_ss_alg_template, alg.hash);
+ op->ss = algt->ss;
+
+ op->enginectx.op.do_one_request = sun8i_ss_hash_run;
+ op->enginectx.op.prepare_request = NULL;
+ op->enginectx.op.unprepare_request = NULL;
+
+ /* FALLBACK */
+ op->fallback_tfm = crypto_alloc_ahash(crypto_tfm_alg_name(tfm), 0,
+ CRYPTO_ALG_NEED_FALLBACK);
+ if (IS_ERR(op->fallback_tfm)) {
+ dev_err(algt->ss->dev, "Fallback driver could no be loaded\n");
+ return PTR_ERR(op->fallback_tfm);
+ }
+
+ if (algt->alg.hash.halg.statesize < crypto_ahash_statesize(op->fallback_tfm))
+ algt->alg.hash.halg.statesize = crypto_ahash_statesize(op->fallback_tfm);
+
+ crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
+ sizeof(struct sun8i_ss_hash_reqctx) +
+ crypto_ahash_reqsize(op->fallback_tfm));
+
+ dev_info(op->ss->dev, "Fallback for %s is %s\n",
+ crypto_tfm_alg_driver_name(tfm),
+ crypto_tfm_alg_driver_name(&op->fallback_tfm->base));
+ err = pm_runtime_get_sync(op->ss->dev);
+ if (err < 0)
+ goto error_pm;
+ return 0;
+error_pm:
+ crypto_free_ahash(op->fallback_tfm);
+ return err;
+}
+
+void sun8i_ss_hash_craexit(struct crypto_tfm *tfm)
+{
+ struct sun8i_ss_hash_tfm_ctx *tfmctx = crypto_tfm_ctx(tfm);
+
+ crypto_free_ahash(tfmctx->fallback_tfm);
+ pm_runtime_put_sync_suspend(tfmctx->ss->dev);
+}
+
+int sun8i_ss_hash_init(struct ahash_request *areq)
+{
+ struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
+ struct sun8i_ss_hash_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm);
+ struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg);
+ struct sun8i_ss_alg_template *algt;
+
+ memset(rctx, 0, sizeof(struct sun8i_ss_hash_reqctx));
+
+ algt = container_of(alg, struct sun8i_ss_alg_template, alg.hash);
+
+ ahash_request_set_tfm(&rctx->fallback_req, tfmctx->fallback_tfm);
+ rctx->fallback_req.base.flags = areq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ return crypto_ahash_init(&rctx->fallback_req);
+}
+
+int sun8i_ss_hash_export(struct ahash_request *areq, void *out)
+{
+ struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
+ struct sun8i_ss_hash_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm);
+
+ ahash_request_set_tfm(&rctx->fallback_req, tfmctx->fallback_tfm);
+ rctx->fallback_req.base.flags = areq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ return crypto_ahash_export(&rctx->fallback_req, out);
+}
+
+int sun8i_ss_hash_import(struct ahash_request *areq, const void *in)
+{
+ struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
+ struct sun8i_ss_hash_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm);
+
+ ahash_request_set_tfm(&rctx->fallback_req, tfmctx->fallback_tfm);
+ rctx->fallback_req.base.flags = areq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ return crypto_ahash_import(&rctx->fallback_req, in);
+}
+
+int sun8i_ss_hash_final(struct ahash_request *areq)
+{
+ struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
+ struct sun8i_ss_hash_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm);
+#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG
+ struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg);
+ struct sun8i_ss_alg_template *algt;
+#endif
+
+ ahash_request_set_tfm(&rctx->fallback_req, tfmctx->fallback_tfm);
+ rctx->fallback_req.base.flags = areq->base.flags &
+ CRYPTO_TFM_REQ_MAY_SLEEP;
+ rctx->fallback_req.result = areq->result;
+
+#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG
+ algt = container_of(alg, struct sun8i_ss_alg_template, alg.hash);
+ algt->stat_fb++;
+#endif
+
+ return crypto_ahash_final(&rctx->fallback_req);
+}
+
+int sun8i_ss_hash_update(struct ahash_request *areq)
+{
+ struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
+ struct sun8i_ss_hash_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm);
+
+ ahash_request_set_tfm(&rctx->fallback_req, tfmctx->fallback_tfm);
+ rctx->fallback_req.base.flags = areq->base.flags &
+ CRYPTO_TFM_REQ_MAY_SLEEP;
+ rctx->fallback_req.nbytes = areq->nbytes;
+ rctx->fallback_req.src = areq->src;
+
+ return crypto_ahash_update(&rctx->fallback_req);
+}
+
+int sun8i_ss_hash_finup(struct ahash_request *areq)
+{
+ struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
+ struct sun8i_ss_hash_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm);
+#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG
+ struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg);
+ struct sun8i_ss_alg_template *algt;
+#endif
+
+ ahash_request_set_tfm(&rctx->fallback_req, tfmctx->fallback_tfm);
+ rctx->fallback_req.base.flags = areq->base.flags &
+ CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ rctx->fallback_req.nbytes = areq->nbytes;
+ rctx->fallback_req.src = areq->src;
+ rctx->fallback_req.result = areq->result;
+#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG
+ algt = container_of(alg, struct sun8i_ss_alg_template, alg.hash);
+ algt->stat_fb++;
+#endif
+
+ return crypto_ahash_finup(&rctx->fallback_req);
+}
+
+int sun8i_ss_hash_digest_fb(struct ahash_request *areq)
+{
+ struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
+ struct sun8i_ss_hash_tfm_ctx *tfmctx = crypto_ahash_ctx(tfm);
+#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG
+ struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg);
+ struct sun8i_ss_alg_template *algt;
+#endif
+
+ ahash_request_set_tfm(&rctx->fallback_req, tfmctx->fallback_tfm);
+ rctx->fallback_req.base.flags = areq->base.flags &
+ CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ rctx->fallback_req.nbytes = areq->nbytes;
+ rctx->fallback_req.src = areq->src;
+ rctx->fallback_req.result = areq->result;
+#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG
+ algt = container_of(alg, struct sun8i_ss_alg_template, alg.hash);
+ algt->stat_fb++;
+#endif
+
+ return crypto_ahash_digest(&rctx->fallback_req);
+}
+
+static int sun8i_ss_run_hash_task(struct sun8i_ss_dev *ss,
+ struct sun8i_ss_hash_reqctx *rctx,
+ const char *name)
+{
+ int flow = rctx->flow;
+ u32 v = SS_START;
+ int i;
+
+#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG
+ ss->flows[flow].stat_req++;
+#endif
+
+ /* choose between stream0/stream1 */
+ if (flow)
+ v |= SS_FLOW1;
+ else
+ v |= SS_FLOW0;
+
+ v |= rctx->method;
+
+ for (i = 0; i < MAX_SG; i++) {
+ if (!rctx->t_dst[i].addr)
+ break;
+
+ mutex_lock(&ss->mlock);
+ if (i > 0) {
+ v |= BIT(17);
+ writel(rctx->t_dst[i - 1].addr, ss->base + SS_KEY_ADR_REG);
+ writel(rctx->t_dst[i - 1].addr, ss->base + SS_IV_ADR_REG);
+ }
+
+ dev_dbg(ss->dev,
+ "Processing SG %d on flow %d %s ctl=%x %d to %d method=%x src=%x dst=%x\n",
+ i, flow, name, v,
+ rctx->t_src[i].len, rctx->t_dst[i].len,
+ rctx->method, rctx->t_src[i].addr, rctx->t_dst[i].addr);
+
+ writel(rctx->t_src[i].addr, ss->base + SS_SRC_ADR_REG);
+ writel(rctx->t_dst[i].addr, ss->base + SS_DST_ADR_REG);
+ writel(rctx->t_src[i].len, ss->base + SS_LEN_ADR_REG);
+ writel(BIT(0) | BIT(1), ss->base + SS_INT_CTL_REG);
+
+ reinit_completion(&ss->flows[flow].complete);
+ ss->flows[flow].status = 0;
+ wmb();
+
+ writel(v, ss->base + SS_CTL_REG);
+ mutex_unlock(&ss->mlock);
+ wait_for_completion_interruptible_timeout(&ss->flows[flow].complete,
+ msecs_to_jiffies(2000));
+ if (ss->flows[flow].status == 0) {
+ dev_err(ss->dev, "DMA timeout for %s\n", name);
+ return -EFAULT;
+ }
+ }
+
+ return 0;
+}
+
+static bool sun8i_ss_hash_need_fallback(struct ahash_request *areq)
+{
+ struct scatterlist *sg;
+
+ if (areq->nbytes == 0)
+ return true;
+ /* we need to reserve one SG for the padding one */
+ if (sg_nents(areq->src) > MAX_SG - 1)
+ return true;
+ sg = areq->src;
+ while (sg) {
+ /* SS can operate hash only on full block size
+ * since SS support only MD5,sha1,sha224 and sha256, blocksize
+ * is always 64
+ * TODO: handle request if last SG is not len%64
+ * but this will need to copy data on a new SG of size=64
+ */
+ if (sg->length % 64 || !IS_ALIGNED(sg->offset, sizeof(u32)))
+ return true;
+ sg = sg_next(sg);
+ }
+ return false;
+}
+
+int sun8i_ss_hash_digest(struct ahash_request *areq)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
+ struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg);
+ struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq);
+ struct sun8i_ss_alg_template *algt;
+ struct sun8i_ss_dev *ss;
+ struct crypto_engine *engine;
+ struct scatterlist *sg;
+ int nr_sgs, e, i;
+
+ if (sun8i_ss_hash_need_fallback(areq))
+ return sun8i_ss_hash_digest_fb(areq);
+
+ nr_sgs = sg_nents(areq->src);
+ if (nr_sgs > MAX_SG - 1)
+ return sun8i_ss_hash_digest_fb(areq);
+
+ for_each_sg(areq->src, sg, nr_sgs, i) {
+ if (sg->length % 4 || !IS_ALIGNED(sg->offset, sizeof(u32)))
+ return sun8i_ss_hash_digest_fb(areq);
+ }
+
+ algt = container_of(alg, struct sun8i_ss_alg_template, alg.hash);
+ ss = algt->ss;
+
+ e = sun8i_ss_get_engine_number(ss);
+ rctx->flow = e;
+ engine = ss->flows[e].engine;
+
+ return crypto_transfer_hash_request_to_engine(engine, areq);
+}
+
+/* sun8i_ss_hash_run - run an ahash request
+ * Send the data of the request to the SS along with an extra SG with padding
+ */
+int sun8i_ss_hash_run(struct crypto_engine *engine, void *breq)
+{
+ struct ahash_request *areq = container_of(breq, struct ahash_request, base);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
+ struct ahash_alg *alg = __crypto_ahash_alg(tfm->base.__crt_alg);
+ struct sun8i_ss_hash_reqctx *rctx = ahash_request_ctx(areq);
+ struct sun8i_ss_alg_template *algt;
+ struct sun8i_ss_dev *ss;
+ struct scatterlist *sg;
+ int nr_sgs, err, digestsize;
+ unsigned int len;
+ u64 fill, min_fill, byte_count;
+ void *pad, *result;
+ int j, i, todo;
+ __be64 *bebits;
+ __le64 *lebits;
+ dma_addr_t addr_res, addr_pad;
+ u32 *bf;
+
+ algt = container_of(alg, struct sun8i_ss_alg_template, alg.hash);
+ ss = algt->ss;
+
+ digestsize = algt->alg.hash.halg.digestsize;
+ if (digestsize == SHA224_DIGEST_SIZE)
+ digestsize = SHA256_DIGEST_SIZE;
+
+ /* the padding could be up to two block. */
+ pad = kzalloc(algt->alg.hash.halg.base.cra_blocksize * 2, GFP_KERNEL | GFP_DMA);
+ if (!pad)
+ return -ENOMEM;
+ bf = (u32 *)pad;
+
+ result = kzalloc(digestsize, GFP_KERNEL | GFP_DMA);
+ if (!result)
+ return -ENOMEM;
+
+ for (i = 0; i < MAX_SG; i++) {
+ rctx->t_dst[i].addr = 0;
+ rctx->t_dst[i].len = 0;
+ }
+
+#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG
+ algt->stat_req++;
+#endif
+
+ rctx->method = cpu_to_le32(ss->variant->alg_hash[algt->ss_algo_id]);
+
+ nr_sgs = dma_map_sg(ss->dev, areq->src, sg_nents(areq->src), DMA_TO_DEVICE);
+ if (nr_sgs <= 0 || nr_sgs > MAX_SG) {
+ dev_err(ss->dev, "Invalid sg number %d\n", nr_sgs);
+ err = -EINVAL;
+ goto theend;
+ }
+
+ addr_res = dma_map_single(ss->dev, result, digestsize, DMA_FROM_DEVICE);
+ if (dma_mapping_error(ss->dev, addr_res)) {
+ dev_err(ss->dev, "DMA map dest\n");
+ err = -EINVAL;
+ goto theend;
+ }
+
+ len = areq->nbytes;
+ for_each_sg(areq->src, sg, nr_sgs, i) {
+ rctx->t_src[i].addr = cpu_to_le32(sg_dma_address(sg));
+ todo = min(len, sg_dma_len(sg));
+ rctx->t_src[i].len = cpu_to_le32(todo / 4);
+ len -= todo;
+ rctx->t_dst[i].addr = cpu_to_le32(addr_res);
+ rctx->t_dst[i].len = cpu_to_le32(digestsize / 4);
+ }
+ if (len > 0) {
+ dev_err(ss->dev, "remaining len %d\n", len);
+ err = -EINVAL;
+ goto theend;
+ }
+
+ byte_count = areq->nbytes;
+ j = 0;
+ bf[j++] = le32_to_cpu(1 << 7);
+
+ fill = 64 - (byte_count % 64);
+ min_fill = 3 * sizeof(u32);
+
+ if (fill < min_fill)
+ fill += 64;
+
+ j += (fill - min_fill) / sizeof(u32);
+
+ switch (algt->ss_algo_id) {
+ case SS_ID_HASH_MD5:
+ lebits = (__le64 *)&bf[j];
+ *lebits = cpu_to_le64(byte_count << 3);
+ j += 2;
+ break;
+ case SS_ID_HASH_SHA1:
+ case SS_ID_HASH_SHA224:
+ case SS_ID_HASH_SHA256:
+ bebits = (__be64 *)&bf[j];
+ *bebits = cpu_to_be64(byte_count << 3);
+ j += 2;
+ break;
+ }
+
+ addr_pad = dma_map_single(ss->dev, pad, j * 4, DMA_TO_DEVICE);
+ rctx->t_src[i].addr = cpu_to_le32(addr_pad);
+ rctx->t_src[i].len = cpu_to_le32(j);
+ rctx->t_dst[i].addr = cpu_to_le32(addr_res);
+ rctx->t_dst[i].len = cpu_to_le32(digestsize / 4);
+ if (dma_mapping_error(ss->dev, addr_pad)) {
+ dev_err(ss->dev, "DMA error on padding SG\n");
+ err = -EINVAL;
+ goto theend;
+ }
+
+ err = sun8i_ss_run_hash_task(ss, rctx, crypto_tfm_alg_name(areq->base.tfm));
+
+ dma_unmap_single(ss->dev, addr_pad, j * 4, DMA_TO_DEVICE);
+ dma_unmap_sg(ss->dev, areq->src, nr_sgs, DMA_TO_DEVICE);
+ dma_unmap_single(ss->dev, addr_res, digestsize, DMA_FROM_DEVICE);
+
+ kfree(pad);
+
+ memcpy(areq->result, result, algt->alg.hash.halg.digestsize);
+ kfree(result);
+theend:
+ crypto_finalize_hash_request(engine, breq, err);
+ return 0;
+}
diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h
index 0223e10495ac..350a611b0b9e 100644
--- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h
@@ -13,6 +13,9 @@
#include <linux/atomic.h>
#include <linux/debugfs.h>
#include <linux/crypto.h>
+#include <crypto/internal/hash.h>
+#include <crypto/md5.h>
+#include <crypto/sha.h>

#define SS_START 1

@@ -22,7 +25,11 @@
#define SS_ALG_AES 0
#define SS_ALG_DES (1 << 2)
#define SS_ALG_3DES (2 << 2)
+#define SS_ALG_MD5 (3 << 2)
#define SS_ALG_PRNG (4 << 2)
+#define SS_ALG_SHA1 (6 << 2)
+#define SS_ALG_SHA224 (7 << 2)
+#define SS_ALG_SHA256 (8 << 2)

#define SS_CTL_REG 0x00
#define SS_INT_CTL_REG 0x04
@@ -51,6 +58,12 @@
#define SS_OP_ECB 0
#define SS_OP_CBC (1 << 13)

+#define SS_ID_HASH_MD5 0
+#define SS_ID_HASH_SHA1 1
+#define SS_ID_HASH_SHA224 2
+#define SS_ID_HASH_SHA256 3
+#define SS_ID_HASH_MAX 4
+
#define SS_FLOW0 BIT(30)
#define SS_FLOW1 BIT(31)

@@ -84,11 +97,14 @@ struct ss_clock {
* struct ss_variant - Describe SS capability for each variant hardware
* @alg_cipher: list of supported ciphers. for each SS_ID_ this will give the
* coresponding SS_ALG_XXX value
+ * @alg_hash: list of supported hashes. for each SS_ID_ this will give the
+ * corresponding SS_ALG_XXX value
* @op_mode: list of supported block modes
* @ss_clks! list of clock needed by this variant
*/
struct ss_variant {
char alg_cipher[SS_ID_CIPHER_MAX];
+ char alg_hash[SS_ID_HASH_MAX];
u32 op_mode[SS_ID_OP_MAX];
struct ss_clock ss_clks[SS_MAX_CLOCKS];
};
@@ -196,6 +212,38 @@ struct sun8i_ss_rng_tfm_ctx {
unsigned int slen;
};

+/*
+ * struct sun8i_ss_hash_tfm_ctx - context for an ahash TFM
+ * @enginectx: crypto_engine used by this TFM
+ * @fallback_tfm: pointer to the fallback TFM
+ * @ss: pointer to the private data of driver handling this TFM
+ *
+ * enginectx must be the first element
+ */
+struct sun8i_ss_hash_tfm_ctx {
+ struct crypto_engine_ctx enginectx;
+ struct crypto_ahash *fallback_tfm;
+ struct sun8i_ss_dev *ss;
+};
+
+/*
+ * struct sun8i_ss_hash_reqctx - context for an ahash request
+ * @t_src: list of DMA address and size for source SGs
+ * @t_dst: list of DMA address and size for destination SGs
+ * @fallback_req: pre-allocated fallback request
+ * @method: the register value for the algorithm used by this request
+ * @flow: the flow to use for this request
+ *
+ * t_src, t_dst and method must be in LE32
+ */
+struct sun8i_ss_hash_reqctx {
+ struct sginfo t_src[MAX_SG];
+ struct sginfo t_dst[MAX_SG];
+ struct ahash_request fallback_req;
+ u32 method;
+ int flow;
+};
+
/*
* struct sun8i_ss_alg_template - crypto_alg template
* @type: the CRYPTO_ALG_TYPE for this template
@@ -216,6 +264,7 @@ struct sun8i_ss_alg_template {
union {
struct skcipher_alg skcipher;
struct rng_alg rng;
+ struct ahash_alg hash;
} alg;
#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG
unsigned long stat_req;
@@ -243,3 +292,14 @@ int sun8i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src,
int sun8i_ss_prng_seed(struct crypto_rng *tfm, const u8 *seed, unsigned int slen);
int sun8i_ss_prng_init(struct crypto_tfm *tfm);
void sun8i_ss_prng_exit(struct crypto_tfm *tfm);
+
+int sun8i_ss_hash_crainit(struct crypto_tfm *tfm);
+void sun8i_ss_hash_craexit(struct crypto_tfm *tfm);
+int sun8i_ss_hash_init(struct ahash_request *areq);
+int sun8i_ss_hash_export(struct ahash_request *areq, void *out);
+int sun8i_ss_hash_import(struct ahash_request *areq, const void *in);
+int sun8i_ss_hash_final(struct ahash_request *areq);
+int sun8i_ss_hash_update(struct ahash_request *areq);
+int sun8i_ss_hash_finup(struct ahash_request *areq);
+int sun8i_ss_hash_digest(struct ahash_request *areq);
+int sun8i_ss_hash_run(struct crypto_engine *engine, void *breq);
--
2.26.2