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-rw-r--r--drivers/crypto/qce/sha.c545
1 files changed, 545 insertions, 0 deletions
diff --git a/drivers/crypto/qce/sha.c b/drivers/crypto/qce/sha.c
new file mode 100644
index 0000000000..fc72af8aa9
--- /dev/null
+++ b/drivers/crypto/qce/sha.c
@@ -0,0 +1,545 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <crypto/internal/hash.h>
+
+#include "common.h"
+#include "core.h"
+#include "sha.h"
+
+struct qce_sha_saved_state {
+ u8 pending_buf[QCE_SHA_MAX_BLOCKSIZE];
+ u8 partial_digest[QCE_SHA_MAX_DIGESTSIZE];
+ __be32 byte_count[2];
+ unsigned int pending_buflen;
+ unsigned int flags;
+ u64 count;
+ bool first_blk;
+};
+
+static LIST_HEAD(ahash_algs);
+
+static const u32 std_iv_sha1[SHA256_DIGEST_SIZE / sizeof(u32)] = {
+ SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4, 0, 0, 0
+};
+
+static const u32 std_iv_sha256[SHA256_DIGEST_SIZE / sizeof(u32)] = {
+ SHA256_H0, SHA256_H1, SHA256_H2, SHA256_H3,
+ SHA256_H4, SHA256_H5, SHA256_H6, SHA256_H7
+};
+
+static void qce_ahash_done(void *data)
+{
+ struct crypto_async_request *async_req = data;
+ struct ahash_request *req = ahash_request_cast(async_req);
+ struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+ struct qce_sha_reqctx *rctx = ahash_request_ctx_dma(req);
+ struct qce_alg_template *tmpl = to_ahash_tmpl(async_req->tfm);
+ struct qce_device *qce = tmpl->qce;
+ struct qce_result_dump *result = qce->dma.result_buf;
+ unsigned int digestsize = crypto_ahash_digestsize(ahash);
+ int error;
+ u32 status;
+
+ error = qce_dma_terminate_all(&qce->dma);
+ if (error)
+ dev_dbg(qce->dev, "ahash dma termination error (%d)\n", error);
+
+ dma_unmap_sg(qce->dev, req->src, rctx->src_nents, DMA_TO_DEVICE);
+ dma_unmap_sg(qce->dev, &rctx->result_sg, 1, DMA_FROM_DEVICE);
+
+ memcpy(rctx->digest, result->auth_iv, digestsize);
+ if (req->result && rctx->last_blk)
+ memcpy(req->result, result->auth_iv, digestsize);
+
+ rctx->byte_count[0] = cpu_to_be32(result->auth_byte_count[0]);
+ rctx->byte_count[1] = cpu_to_be32(result->auth_byte_count[1]);
+
+ error = qce_check_status(qce, &status);
+ if (error < 0)
+ dev_dbg(qce->dev, "ahash operation error (%x)\n", status);
+
+ req->src = rctx->src_orig;
+ req->nbytes = rctx->nbytes_orig;
+ rctx->last_blk = false;
+ rctx->first_blk = false;
+
+ qce->async_req_done(tmpl->qce, error);
+}
+
+static int qce_ahash_async_req_handle(struct crypto_async_request *async_req)
+{
+ struct ahash_request *req = ahash_request_cast(async_req);
+ struct qce_sha_reqctx *rctx = ahash_request_ctx_dma(req);
+ struct qce_sha_ctx *ctx = crypto_tfm_ctx(async_req->tfm);
+ struct qce_alg_template *tmpl = to_ahash_tmpl(async_req->tfm);
+ struct qce_device *qce = tmpl->qce;
+ unsigned long flags = rctx->flags;
+ int ret;
+
+ if (IS_SHA_HMAC(flags)) {
+ rctx->authkey = ctx->authkey;
+ rctx->authklen = QCE_SHA_HMAC_KEY_SIZE;
+ } else if (IS_CMAC(flags)) {
+ rctx->authkey = ctx->authkey;
+ rctx->authklen = AES_KEYSIZE_128;
+ }
+
+ rctx->src_nents = sg_nents_for_len(req->src, req->nbytes);
+ if (rctx->src_nents < 0) {
+ dev_err(qce->dev, "Invalid numbers of src SG.\n");
+ return rctx->src_nents;
+ }
+
+ ret = dma_map_sg(qce->dev, req->src, rctx->src_nents, DMA_TO_DEVICE);
+ if (!ret)
+ return -EIO;
+
+ sg_init_one(&rctx->result_sg, qce->dma.result_buf, QCE_RESULT_BUF_SZ);
+
+ ret = dma_map_sg(qce->dev, &rctx->result_sg, 1, DMA_FROM_DEVICE);
+ if (!ret) {
+ ret = -EIO;
+ goto error_unmap_src;
+ }
+
+ ret = qce_dma_prep_sgs(&qce->dma, req->src, rctx->src_nents,
+ &rctx->result_sg, 1, qce_ahash_done, async_req);
+ if (ret)
+ goto error_unmap_dst;
+
+ qce_dma_issue_pending(&qce->dma);
+
+ ret = qce_start(async_req, tmpl->crypto_alg_type);
+ if (ret)
+ goto error_terminate;
+
+ return 0;
+
+error_terminate:
+ qce_dma_terminate_all(&qce->dma);
+error_unmap_dst:
+ dma_unmap_sg(qce->dev, &rctx->result_sg, 1, DMA_FROM_DEVICE);
+error_unmap_src:
+ dma_unmap_sg(qce->dev, req->src, rctx->src_nents, DMA_TO_DEVICE);
+ return ret;
+}
+
+static int qce_ahash_init(struct ahash_request *req)
+{
+ struct qce_sha_reqctx *rctx = ahash_request_ctx_dma(req);
+ struct qce_alg_template *tmpl = to_ahash_tmpl(req->base.tfm);
+ const u32 *std_iv = tmpl->std_iv;
+
+ memset(rctx, 0, sizeof(*rctx));
+ rctx->first_blk = true;
+ rctx->last_blk = false;
+ rctx->flags = tmpl->alg_flags;
+ memcpy(rctx->digest, std_iv, sizeof(rctx->digest));
+
+ return 0;
+}
+
+static int qce_ahash_export(struct ahash_request *req, void *out)
+{
+ struct qce_sha_reqctx *rctx = ahash_request_ctx_dma(req);
+ struct qce_sha_saved_state *export_state = out;
+
+ memcpy(export_state->pending_buf, rctx->buf, rctx->buflen);
+ memcpy(export_state->partial_digest, rctx->digest, sizeof(rctx->digest));
+ export_state->byte_count[0] = rctx->byte_count[0];
+ export_state->byte_count[1] = rctx->byte_count[1];
+ export_state->pending_buflen = rctx->buflen;
+ export_state->count = rctx->count;
+ export_state->first_blk = rctx->first_blk;
+ export_state->flags = rctx->flags;
+
+ return 0;
+}
+
+static int qce_ahash_import(struct ahash_request *req, const void *in)
+{
+ struct qce_sha_reqctx *rctx = ahash_request_ctx_dma(req);
+ const struct qce_sha_saved_state *import_state = in;
+
+ memset(rctx, 0, sizeof(*rctx));
+ rctx->count = import_state->count;
+ rctx->buflen = import_state->pending_buflen;
+ rctx->first_blk = import_state->first_blk;
+ rctx->flags = import_state->flags;
+ rctx->byte_count[0] = import_state->byte_count[0];
+ rctx->byte_count[1] = import_state->byte_count[1];
+ memcpy(rctx->buf, import_state->pending_buf, rctx->buflen);
+ memcpy(rctx->digest, import_state->partial_digest, sizeof(rctx->digest));
+
+ return 0;
+}
+
+static int qce_ahash_update(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct qce_sha_reqctx *rctx = ahash_request_ctx_dma(req);
+ struct qce_alg_template *tmpl = to_ahash_tmpl(req->base.tfm);
+ struct qce_device *qce = tmpl->qce;
+ struct scatterlist *sg_last, *sg;
+ unsigned int total, len;
+ unsigned int hash_later;
+ unsigned int nbytes;
+ unsigned int blocksize;
+
+ blocksize = crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
+ rctx->count += req->nbytes;
+
+ /* check for buffer from previous updates and append it */
+ total = req->nbytes + rctx->buflen;
+
+ if (total <= blocksize) {
+ scatterwalk_map_and_copy(rctx->buf + rctx->buflen, req->src,
+ 0, req->nbytes, 0);
+ rctx->buflen += req->nbytes;
+ return 0;
+ }
+
+ /* save the original req structure fields */
+ rctx->src_orig = req->src;
+ rctx->nbytes_orig = req->nbytes;
+
+ /*
+ * if we have data from previous update copy them on buffer. The old
+ * data will be combined with current request bytes.
+ */
+ if (rctx->buflen)
+ memcpy(rctx->tmpbuf, rctx->buf, rctx->buflen);
+
+ /* calculate how many bytes will be hashed later */
+ hash_later = total % blocksize;
+
+ /*
+ * At this point, there is more than one block size of data. If
+ * the available data to transfer is exactly a multiple of block
+ * size, save the last block to be transferred in qce_ahash_final
+ * (with the last block bit set) if this is indeed the end of data
+ * stream. If not this saved block will be transferred as part of
+ * next update. If this block is not held back and if this is
+ * indeed the end of data stream, the digest obtained will be wrong
+ * since qce_ahash_final will see that rctx->buflen is 0 and return
+ * doing nothing which in turn means that a digest will not be
+ * copied to the destination result buffer. qce_ahash_final cannot
+ * be made to alter this behavior and allowed to proceed if
+ * rctx->buflen is 0 because the crypto engine BAM does not allow
+ * for zero length transfers.
+ */
+ if (!hash_later)
+ hash_later = blocksize;
+
+ if (hash_later) {
+ unsigned int src_offset = req->nbytes - hash_later;
+ scatterwalk_map_and_copy(rctx->buf, req->src, src_offset,
+ hash_later, 0);
+ }
+
+ /* here nbytes is multiple of blocksize */
+ nbytes = total - hash_later;
+
+ len = rctx->buflen;
+ sg = sg_last = req->src;
+
+ while (len < nbytes && sg) {
+ if (len + sg_dma_len(sg) > nbytes)
+ break;
+ len += sg_dma_len(sg);
+ sg_last = sg;
+ sg = sg_next(sg);
+ }
+
+ if (!sg_last)
+ return -EINVAL;
+
+ if (rctx->buflen) {
+ sg_init_table(rctx->sg, 2);
+ sg_set_buf(rctx->sg, rctx->tmpbuf, rctx->buflen);
+ sg_chain(rctx->sg, 2, req->src);
+ req->src = rctx->sg;
+ }
+
+ req->nbytes = nbytes;
+ rctx->buflen = hash_later;
+
+ return qce->async_req_enqueue(tmpl->qce, &req->base);
+}
+
+static int qce_ahash_final(struct ahash_request *req)
+{
+ struct qce_sha_reqctx *rctx = ahash_request_ctx_dma(req);
+ struct qce_alg_template *tmpl = to_ahash_tmpl(req->base.tfm);
+ struct qce_device *qce = tmpl->qce;
+
+ if (!rctx->buflen) {
+ if (tmpl->hash_zero)
+ memcpy(req->result, tmpl->hash_zero,
+ tmpl->alg.ahash.halg.digestsize);
+ return 0;
+ }
+
+ rctx->last_blk = true;
+
+ rctx->src_orig = req->src;
+ rctx->nbytes_orig = req->nbytes;
+
+ memcpy(rctx->tmpbuf, rctx->buf, rctx->buflen);
+ sg_init_one(rctx->sg, rctx->tmpbuf, rctx->buflen);
+
+ req->src = rctx->sg;
+ req->nbytes = rctx->buflen;
+
+ return qce->async_req_enqueue(tmpl->qce, &req->base);
+}
+
+static int qce_ahash_digest(struct ahash_request *req)
+{
+ struct qce_sha_reqctx *rctx = ahash_request_ctx_dma(req);
+ struct qce_alg_template *tmpl = to_ahash_tmpl(req->base.tfm);
+ struct qce_device *qce = tmpl->qce;
+ int ret;
+
+ ret = qce_ahash_init(req);
+ if (ret)
+ return ret;
+
+ rctx->src_orig = req->src;
+ rctx->nbytes_orig = req->nbytes;
+ rctx->first_blk = true;
+ rctx->last_blk = true;
+
+ if (!rctx->nbytes_orig) {
+ if (tmpl->hash_zero)
+ memcpy(req->result, tmpl->hash_zero,
+ tmpl->alg.ahash.halg.digestsize);
+ return 0;
+ }
+
+ return qce->async_req_enqueue(tmpl->qce, &req->base);
+}
+
+static int qce_ahash_hmac_setkey(struct crypto_ahash *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ unsigned int digestsize = crypto_ahash_digestsize(tfm);
+ struct qce_sha_ctx *ctx = crypto_tfm_ctx(&tfm->base);
+ struct crypto_wait wait;
+ struct ahash_request *req;
+ struct scatterlist sg;
+ unsigned int blocksize;
+ struct crypto_ahash *ahash_tfm;
+ u8 *buf;
+ int ret;
+ const char *alg_name;
+
+ blocksize = crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
+ memset(ctx->authkey, 0, sizeof(ctx->authkey));
+
+ if (keylen <= blocksize) {
+ memcpy(ctx->authkey, key, keylen);
+ return 0;
+ }
+
+ if (digestsize == SHA1_DIGEST_SIZE)
+ alg_name = "sha1-qce";
+ else if (digestsize == SHA256_DIGEST_SIZE)
+ alg_name = "sha256-qce";
+ else
+ return -EINVAL;
+
+ ahash_tfm = crypto_alloc_ahash(alg_name, 0, 0);
+ if (IS_ERR(ahash_tfm))
+ return PTR_ERR(ahash_tfm);
+
+ req = ahash_request_alloc(ahash_tfm, GFP_KERNEL);
+ if (!req) {
+ ret = -ENOMEM;
+ goto err_free_ahash;
+ }
+
+ crypto_init_wait(&wait);
+ ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
+ crypto_req_done, &wait);
+ crypto_ahash_clear_flags(ahash_tfm, ~0);
+
+ buf = kzalloc(keylen + QCE_MAX_ALIGN_SIZE, GFP_KERNEL);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto err_free_req;
+ }
+
+ memcpy(buf, key, keylen);
+ sg_init_one(&sg, buf, keylen);
+ ahash_request_set_crypt(req, &sg, ctx->authkey, keylen);
+
+ ret = crypto_wait_req(crypto_ahash_digest(req), &wait);
+
+ kfree(buf);
+err_free_req:
+ ahash_request_free(req);
+err_free_ahash:
+ crypto_free_ahash(ahash_tfm);
+ return ret;
+}
+
+static int qce_ahash_cra_init(struct crypto_tfm *tfm)
+{
+ struct crypto_ahash *ahash = __crypto_ahash_cast(tfm);
+ struct qce_sha_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ crypto_ahash_set_reqsize_dma(ahash, sizeof(struct qce_sha_reqctx));
+ memset(ctx, 0, sizeof(*ctx));
+ return 0;
+}
+
+struct qce_ahash_def {
+ unsigned long flags;
+ const char *name;
+ const char *drv_name;
+ unsigned int digestsize;
+ unsigned int blocksize;
+ unsigned int statesize;
+ const u32 *std_iv;
+};
+
+static const struct qce_ahash_def ahash_def[] = {
+ {
+ .flags = QCE_HASH_SHA1,
+ .name = "sha1",
+ .drv_name = "sha1-qce",
+ .digestsize = SHA1_DIGEST_SIZE,
+ .blocksize = SHA1_BLOCK_SIZE,
+ .statesize = sizeof(struct qce_sha_saved_state),
+ .std_iv = std_iv_sha1,
+ },
+ {
+ .flags = QCE_HASH_SHA256,
+ .name = "sha256",
+ .drv_name = "sha256-qce",
+ .digestsize = SHA256_DIGEST_SIZE,
+ .blocksize = SHA256_BLOCK_SIZE,
+ .statesize = sizeof(struct qce_sha_saved_state),
+ .std_iv = std_iv_sha256,
+ },
+ {
+ .flags = QCE_HASH_SHA1_HMAC,
+ .name = "hmac(sha1)",
+ .drv_name = "hmac-sha1-qce",
+ .digestsize = SHA1_DIGEST_SIZE,
+ .blocksize = SHA1_BLOCK_SIZE,
+ .statesize = sizeof(struct qce_sha_saved_state),
+ .std_iv = std_iv_sha1,
+ },
+ {
+ .flags = QCE_HASH_SHA256_HMAC,
+ .name = "hmac(sha256)",
+ .drv_name = "hmac-sha256-qce",
+ .digestsize = SHA256_DIGEST_SIZE,
+ .blocksize = SHA256_BLOCK_SIZE,
+ .statesize = sizeof(struct qce_sha_saved_state),
+ .std_iv = std_iv_sha256,
+ },
+};
+
+static int qce_ahash_register_one(const struct qce_ahash_def *def,
+ struct qce_device *qce)
+{
+ struct qce_alg_template *tmpl;
+ struct ahash_alg *alg;
+ struct crypto_alg *base;
+ int ret;
+
+ tmpl = kzalloc(sizeof(*tmpl), GFP_KERNEL);
+ if (!tmpl)
+ return -ENOMEM;
+
+ tmpl->std_iv = def->std_iv;
+
+ alg = &tmpl->alg.ahash;
+ alg->init = qce_ahash_init;
+ alg->update = qce_ahash_update;
+ alg->final = qce_ahash_final;
+ alg->digest = qce_ahash_digest;
+ alg->export = qce_ahash_export;
+ alg->import = qce_ahash_import;
+ if (IS_SHA_HMAC(def->flags))
+ alg->setkey = qce_ahash_hmac_setkey;
+ alg->halg.digestsize = def->digestsize;
+ alg->halg.statesize = def->statesize;
+
+ if (IS_SHA1(def->flags))
+ tmpl->hash_zero = sha1_zero_message_hash;
+ else if (IS_SHA256(def->flags))
+ tmpl->hash_zero = sha256_zero_message_hash;
+
+ base = &alg->halg.base;
+ base->cra_blocksize = def->blocksize;
+ base->cra_priority = 300;
+ base->cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_KERN_DRIVER_ONLY;
+ base->cra_ctxsize = sizeof(struct qce_sha_ctx);
+ base->cra_alignmask = 0;
+ base->cra_module = THIS_MODULE;
+ base->cra_init = qce_ahash_cra_init;
+
+ snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
+ snprintf(base->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
+ def->drv_name);
+
+ INIT_LIST_HEAD(&tmpl->entry);
+ tmpl->crypto_alg_type = CRYPTO_ALG_TYPE_AHASH;
+ tmpl->alg_flags = def->flags;
+ tmpl->qce = qce;
+
+ ret = crypto_register_ahash(alg);
+ if (ret) {
+ dev_err(qce->dev, "%s registration failed\n", base->cra_name);
+ kfree(tmpl);
+ return ret;
+ }
+
+ list_add_tail(&tmpl->entry, &ahash_algs);
+ dev_dbg(qce->dev, "%s is registered\n", base->cra_name);
+ return 0;
+}
+
+static void qce_ahash_unregister(struct qce_device *qce)
+{
+ struct qce_alg_template *tmpl, *n;
+
+ list_for_each_entry_safe(tmpl, n, &ahash_algs, entry) {
+ crypto_unregister_ahash(&tmpl->alg.ahash);
+ list_del(&tmpl->entry);
+ kfree(tmpl);
+ }
+}
+
+static int qce_ahash_register(struct qce_device *qce)
+{
+ int ret, i;
+
+ for (i = 0; i < ARRAY_SIZE(ahash_def); i++) {
+ ret = qce_ahash_register_one(&ahash_def[i], qce);
+ if (ret)
+ goto err;
+ }
+
+ return 0;
+err:
+ qce_ahash_unregister(qce);
+ return ret;
+}
+
+const struct qce_algo_ops ahash_ops = {
+ .type = CRYPTO_ALG_TYPE_AHASH,
+ .register_algs = qce_ahash_register,
+ .unregister_algs = qce_ahash_unregister,
+ .async_req_handle = qce_ahash_async_req_handle,
+};