---
drivers/crypto/dwc-spacc/spacc_ahash.c | 1292 ++++++++++++++++++++++++
1 file changed, 1292 insertions(+)
create mode 100644 drivers/crypto/dwc-spacc/spacc_ahash.c
diff --git a/drivers/crypto/dwc-spacc/spacc_ahash.c b/drivers/crypto/dwc-spacc/spacc_ahash.c
new file mode 100644
index 0000000000000..df026f0c615ef
--- /dev/null
+++ b/drivers/crypto/dwc-spacc/spacc_ahash.c
@@ -0,0 +1,1292 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/dmapool.h>
+#include <crypto/sm3.h>
+#include <crypto/sha1.h>
+#include <crypto/sha2.h>
+#include <crypto/sha3.h>
+#include <crypto/md5.h>
+#include <crypto/aes.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <crypto/internal/hash.h>
+
+#include "spacc_device.h"
+#include "spacc_core.h"
+
+#define PPP_BUF_SIZE 128
+
+struct sdesc {
+ struct shash_desc shash;
+ char ctx[];
+};
+
+static struct dma_pool *spacc_hash_pool;
+static LIST_HEAD(spacc_hash_alg_list);
+static LIST_HEAD(head_sglbuf);
+static DEFINE_MUTEX(spacc_hash_alg_mutex);
+
+static int dma_map_count;
+
+static struct mode_tab possible_hashes[] = {
+ { .keylen[0] = 16, MODE_TAB_HASH("cmac(aes)", MAC_CMAC, 16, 16),
+ .sw_fb = true },
+ { .keylen[0] = 48 | MODE_TAB_HASH_XCBC, MODE_TAB_HASH("xcbc(aes)",
+ MAC_XCBC, 16, 16), .sw_fb = true },
+
+ { MODE_TAB_HASH("cmac(sm4)", MAC_SM4_CMAC, 16, 16), .sw_fb = true },
+ { .keylen[0] = 32 | MODE_TAB_HASH_XCBC, MODE_TAB_HASH("xcbc(sm4)",
+ MAC_SM4_XCBC, 16, 16), .sw_fb = true },
+
+ { MODE_TAB_HASH("hmac(md5)", HMAC_MD5, MD5_DIGEST_SIZE,
+ MD5_HMAC_BLOCK_SIZE), .sw_fb = true },
+ { MODE_TAB_HASH("md5", HASH_MD5, MD5_DIGEST_SIZE,
+ MD5_HMAC_BLOCK_SIZE), .sw_fb = true },
+
+ { MODE_TAB_HASH("hmac(sha1)", HMAC_SHA1, SHA1_DIGEST_SIZE,
+ SHA1_BLOCK_SIZE), .sw_fb = true },
+ { MODE_TAB_HASH("sha1", HASH_SHA1, SHA1_DIGEST_SIZE,
+ SHA1_BLOCK_SIZE), .sw_fb = true },
+
+ { MODE_TAB_HASH("sha224", HASH_SHA224, SHA224_DIGEST_SIZE,
+ SHA224_BLOCK_SIZE), .sw_fb = true },
+ { MODE_TAB_HASH("sha256", HASH_SHA256, SHA256_DIGEST_SIZE,
+ SHA256_BLOCK_SIZE), .sw_fb = true },
+ { MODE_TAB_HASH("sha384", HASH_SHA384, SHA384_DIGEST_SIZE,
+ SHA384_BLOCK_SIZE), .sw_fb = true },
+ { MODE_TAB_HASH("sha512", HASH_SHA512, SHA512_DIGEST_SIZE,
+ SHA512_BLOCK_SIZE), .sw_fb = true },
+
+ { MODE_TAB_HASH("hmac(sha512)", HMAC_SHA512, SHA512_DIGEST_SIZE,
+ SHA512_BLOCK_SIZE), .sw_fb = true },
+ { MODE_TAB_HASH("hmac(sha224)", HMAC_SHA224, SHA224_DIGEST_SIZE,
+ SHA224_BLOCK_SIZE), .sw_fb = true },
+ { MODE_TAB_HASH("hmac(sha256)", HMAC_SHA256, SHA256_DIGEST_SIZE,
+ SHA256_BLOCK_SIZE), .sw_fb = true },
+ { MODE_TAB_HASH("hmac(sha384)", HMAC_SHA384, SHA384_DIGEST_SIZE,
+ SHA384_BLOCK_SIZE), .sw_fb = true },
+
+ { MODE_TAB_HASH("sha3-224", HASH_SHA3_224, SHA3_224_DIGEST_SIZE,
+ SHA3_224_BLOCK_SIZE), .sw_fb = true },
+ { MODE_TAB_HASH("sha3-256", HASH_SHA3_256, SHA3_256_DIGEST_SIZE,
+ SHA3_256_BLOCK_SIZE), .sw_fb = true },
+ { MODE_TAB_HASH("sha3-384", HASH_SHA3_384, SHA3_384_DIGEST_SIZE,
+ SHA3_384_BLOCK_SIZE), .sw_fb = true },
+ { MODE_TAB_HASH("sha3-512", HASH_SHA3_512, SHA3_512_DIGEST_SIZE,
+ SHA3_512_BLOCK_SIZE), .sw_fb = true },
+
+ { MODE_TAB_HASH("hmac(sm3)", HMAC_SM3, SM3_DIGEST_SIZE,
+ SM3_BLOCK_SIZE), .sw_fb = true },
+ { MODE_TAB_HASH("sm3", HASH_SM3, SM3_DIGEST_SIZE,
+ SM3_BLOCK_SIZE), .sw_fb = true },
+ { MODE_TAB_HASH("michael_mic", MAC_MICHAEL, 8, 8), .sw_fb = true },
+};
+
+
+static void spacc_hash_cleanup_dma_dst(struct spacc_crypto_ctx *tctx,
+ struct ahash_request *req)
+{
+ struct spacc_crypto_reqctx *ctx = ahash_request_ctx(req);
+
+ pdu_ddt_free(&ctx->dst);
+}
+
+static void spacc_hash_cleanup_dma_src(struct spacc_crypto_ctx *tctx,
+ struct ahash_request *req)
+{
+ struct spacc_crypto_reqctx *ctx = ahash_request_ctx(req);
+
+ if (tctx->ppp_sgl && tctx->ppp_sgl[0].length != 0) {
+ dma_map_count--;
+ dma_unmap_sg(tctx->dev, tctx->ppp_sgl, ctx->src_nents, DMA_TO_DEVICE);
+ kfree(tctx->ppp_sgl_buff);
+ tctx->ppp_sgl_buff = NULL;
+ tctx->ppp_sgl[0].length = 0;
+ } else {
+ dma_map_count--;
+ dma_unmap_sg(tctx->dev, req->src, ctx->src_nents, DMA_TO_DEVICE);
+ }
+
+ pdu_ddt_free(&ctx->src);
+}
+
+//FIXME: Whos is using this?
+static void spacc_hash_cleanup_dma(struct device *dev,
+ struct ahash_request *req)
+{
+ struct spacc_crypto_reqctx *ctx = ahash_request_ctx(req);
+
+ dma_map_count--;
+ dma_unmap_sg(dev, req->src, ctx->src_nents, DMA_TO_DEVICE);
+ pdu_ddt_free(&ctx->src);
+
+ dma_pool_free(spacc_hash_pool, ctx->digest_buf, ctx->digest_dma);
+ pdu_ddt_free(&ctx->dst);
+}
+
+static void spacc_hash_cleanup_ppp(struct ahash_request *req)
+{
+ struct spacc_crypto_reqctx *ctx = ahash_request_ctx(req);
+
+ if (ctx->total_nents) {
+ ctx->total_nents = 0;
+ ctx->cur_part_pck = 0;
+ }
+ ctx->acb.tctx->flag_ppp = 0;
+}
+
+static void spacc_init_calg(struct crypto_alg *calg,
+ const struct mode_tab *mode)
+{
+
+ strscpy(calg->cra_name, mode->name);
+ calg->cra_name[sizeof(mode->name) - 1] = '\0';
+
+ strscpy(calg->cra_driver_name, "spacc-");
+ strcat(calg->cra_driver_name, mode->name);
+ calg->cra_driver_name[sizeof(calg->cra_driver_name) - 1] = '\0';
+
+ calg->cra_blocksize = mode->blocklen;
+}
+
+static int spacc_ctx_clone_handle(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct spacc_crypto_ctx *tctx = crypto_ahash_ctx(tfm);
+ struct spacc_crypto_reqctx *ctx = ahash_request_ctx(req);
+ struct spacc_priv *priv = dev_get_drvdata(tctx->dev);
+
+ ctx->acb.new_handle = spacc_clone_handle(&priv->spacc, tctx->handle,
+ &ctx->acb);
+
+ if (ctx->acb.new_handle < 0) {
+ spacc_hash_cleanup_dma(tctx->dev, req);
+ return -ENOMEM;
+ }
+
+ ctx->acb.tctx = tctx;
+ ctx->acb.ctx = ctx;
+ ctx->acb.req = req;
+ ctx->acb.spacc = &priv->spacc;
+
+ return 0;
+}
+
+static int spacc_partial_packet(struct spacc_device *spacc, int handle,
+ int packet_stat)
+{
+ int ret = CRYPTO_OK;
+ struct spacc_job *job = NULL;
+
+ if (handle < 0 || handle > SPACC_MAX_JOBS)
+ return -ENXIO;
+
+ job = &spacc->job[handle];
+ if (!job) {
+ ret = -EIO;
+ } else {
+ switch (packet_stat) {
+ case NO_PARTIAL_PCK:
+ job->ctrl |= SPACC_CTRL_MASK(SPACC_CTRL_MSG_BEGIN);
+ job->ctrl |= SPACC_CTRL_MASK(SPACC_CTRL_MSG_END);
+ break;
+
+ case FIRST_PARTIAL_PCK:
+ job->ctrl |= SPACC_CTRL_MASK(SPACC_CTRL_MSG_BEGIN);
+ job->ctrl &= ~SPACC_CTRL_MASK(SPACC_CTRL_MSG_END);
+ break;
+
+ case MIDDLE_PARTIAL_PCK:
+ job->ctrl &= ~SPACC_CTRL_MASK(SPACC_CTRL_MSG_BEGIN);
+ job->ctrl &= ~SPACC_CTRL_MASK(SPACC_CTRL_MSG_END);
+ break;
+
+ case LAST_PARTIAL_PCK:
+ job->ctrl &= ~SPACC_CTRL_MASK(SPACC_CTRL_MSG_BEGIN);
+ job->ctrl |= SPACC_CTRL_MASK(SPACC_CTRL_MSG_END);
+ break;
+
+ default: /* NO_PARTIAL_PCK */
+ job->ctrl |= SPACC_CTRL_MASK(SPACC_CTRL_MSG_BEGIN);
+ job->ctrl |= SPACC_CTRL_MASK(SPACC_CTRL_MSG_END);
+ break;
+ }
+ }
+ return ret;
+}
+
+static int modify_scatterlist(struct scatterlist *src, struct scatterlist *t_sg,
+ char *ppp_buf, int prev_remainder_len, int blk_sz,
+ struct spacc_crypto_ctx *tctx, int nbytes, int final)
+{
+ int err;
+ size_t len = nbytes;
+ int sg_total_len;
+ unsigned char *buffer;
+ int remainder_len = (len + prev_remainder_len) % blk_sz;
+
+ buffer = kmalloc(len + prev_remainder_len, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ tctx->ppp_sgl_buff = buffer;
+
+ if (prev_remainder_len)
+ memcpy(buffer, ppp_buf, prev_remainder_len);
+
+ if (final) {
+ memset(ppp_buf, '\0', 128);
+ if (final == 1) {
+ sg_set_buf(t_sg, buffer, prev_remainder_len);
+ err = prev_remainder_len;
+ return err;
+ }
+ //err = len + prev_remainder_len; //FIXME
+ err = sg_copy_to_buffer(src,
+ sg_nents_for_len(src, len),
+ (buffer + prev_remainder_len), len);
+ if (err != len)
+ pr_debug("ERR: Failed to copy scatterlist: err:%d\n",
+ err);
+ sg_set_buf(t_sg, buffer, len+prev_remainder_len);
+ return len+prev_remainder_len;
+ }
+
+ err = sg_copy_to_buffer(src, sg_nents_for_len(src, len),
+ (buffer + prev_remainder_len), len);
+ if (err != len)
+ pr_debug("Failed to copy scatterlist to buffer\n");
+
+ if (remainder_len) {
+ memset(ppp_buf, '\0', 128);
+
+ if (len + prev_remainder_len > blk_sz) {
+ memcpy(ppp_buf, buffer +
+ (len + prev_remainder_len - remainder_len),
+ remainder_len);
+ } else {
+ memcpy(ppp_buf, buffer, remainder_len);
+ kfree(buffer);
+ tctx->ppp_sgl_buff = NULL;
+ }
+ }
+
+ sg_total_len = (len - remainder_len) + prev_remainder_len;
+ sg_set_buf(t_sg, buffer, sg_total_len);
+
+ return remainder_len;
+}
+
+static int spacc_hash_init_dma(struct device *dev, struct ahash_request *req,
+ int final)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct spacc_crypto_ctx *tctx = crypto_ahash_ctx(tfm);
+ const struct spacc_alg *salg = spacc_tfm_ahash(&tfm->base);
+ struct spacc_crypto_reqctx *ctx = ahash_request_ctx(req);
+ struct spacc_priv *priv = dev_get_drvdata(tctx->dev);
+
+ gfp_t mflags = GFP_ATOMIC;
+ int rc = -1, blk_sz = 64;
+ int prev_rem_len = ctx->rem_len;
+ int nbytes = req->nbytes;
+
+ if (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP)
+ mflags = GFP_KERNEL;
+
+ ctx->digest_buf = dma_pool_alloc(spacc_hash_pool, mflags,
+ &ctx->digest_dma);
+
+ if (!ctx->digest_buf)
+ return -ENOMEM;
+
+ rc = pdu_ddt_init(&ctx->dst, 1 | 0x80000000);
+ if (rc < 0) {
+ pr_err("ERR: PDU DDT init error\n");
+ rc = -EIO;
+ goto err_free_digest;
+ }
+ pdu_ddt_add(&ctx->dst, ctx->digest_dma, SPACC_MAX_DIGEST_SIZE);
+
+ if (ctx->total_nents && !ctx->single_shot) {
+ switch (salg->mode->id) {
+ case CRYPTO_MODE_HASH_SHA384:
+ case CRYPTO_MODE_HMAC_SHA384:
+ case CRYPTO_MODE_HASH_SHA512:
+ case CRYPTO_MODE_HMAC_SHA512:
+ blk_sz = 128;
+ break;
+ case CRYPTO_MODE_MAC_MICHAEL:
+ blk_sz = 64;
+ break;
+ default:
+ blk_sz = 64;
+ }
+
+ ctx->rem_len = modify_scatterlist(req->src,
+ &(tctx->ppp_sgl[0]),
+ tctx->ppp_buffer,
+ prev_rem_len, blk_sz,
+ tctx,
+ nbytes, final);
+
+ if (ctx->rem_len < 0)
+ return ctx->rem_len;
+ }
+
+ /* partial packet handling */
+ if (ctx->total_nents && !ctx->single_shot) {
+
+ if (final) {
+ spacc_ctx_clone_handle(req);
+
+ if (!ctx->small_pck) {
+ /* set to LAST PARTIAL PKT, Regular PPP pkt,
+ * final chunk
+ * Also for final rem_len = 0, setting up last
+ * pkt with 0 len doesnt work
+ */
+ rc = spacc_partial_packet(&priv->spacc,
+ ctx->acb.new_handle,
+ LAST_PARTIAL_PCK);
+ if (rc != CRYPTO_OK)
+ return -ENOMEM;
+
+ }
+ } else if (!final && tctx->ppp_sgl[0].length != 0) {
+ spacc_ctx_clone_handle(req);
+
+ /* not a small packet anymore */
+ ctx->small_pck = 0;
+
+ /* Set FIRST/MIDDLE partial pkt */
+ if (ctx->first_ppp_chunk) {
+ ctx->first_ppp_chunk = 0;
+
+ if (ctx->total_nents == ctx->rem_nents &&
+ ctx->rem_len == 0) {
+ /* case of UPDATE % blksz == 0 */
+ spacc_partial_packet(&priv->spacc,
+ ctx->acb.new_handle,
+ NO_PARTIAL_PCK);
+ } else {
+ spacc_partial_packet(&priv->spacc,
+ ctx->acb.new_handle,
+ FIRST_PARTIAL_PCK);
+ }
+ } else {
+
+ if (ctx->total_nents == ctx->rem_nents &&
+ ctx->rem_len == 0) {
+ rc = spacc_partial_packet(&priv->spacc,
+ ctx->acb.new_handle,
+ LAST_PARTIAL_PCK);
+ } else {
+ spacc_partial_packet(&priv->spacc,
+ ctx->acb.new_handle,
+ MIDDLE_PARTIAL_PCK);
+ }
+ }
+ } else {
+ /* set first+last pkt together */
+ return 0;
+ }
+
+ if (tctx->ppp_sgl[0].length) {
+ dma_map_count++;
+ rc = spacc_sg_to_ddt(dev, &(tctx->ppp_sgl[0]),
+ tctx->ppp_sgl[0].length,
+ &ctx->src, DMA_TO_DEVICE);
+ } else {
+ ;/* Handle ZERO msg or ZERO last chunk */
+ }
+
+ } else if (ctx->total_nents > 0 && ctx->single_shot) {
+ /* single shot */
+ spacc_ctx_clone_handle(req);
+
+ if (req->nbytes) {
+ dma_map_count++;
+ rc = spacc_sg_to_ddt(dev, req->src, req->nbytes,
+ &ctx->src, DMA_TO_DEVICE);
+ } else {
+ memset(tctx->ppp_buffer, '\0', PPP_BUF_SIZE);
+ sg_set_buf(&(tctx->ppp_sgl[0]), tctx->ppp_buffer,
+ PPP_BUF_SIZE);
+ dma_map_count++;
+ rc = spacc_sg_to_ddt(dev, &(tctx->ppp_sgl[0]),
+ tctx->ppp_sgl[0].length,
+ &ctx->src, DMA_TO_DEVICE);
+
+ }
+ } else if (ctx->total_nents == 0 && req->nbytes == 0) {
+ spacc_ctx_clone_handle(req);
+
+ /* zero length case */
+ memset(tctx->ppp_buffer, '\0', PPP_BUF_SIZE);
+ sg_set_buf(&(tctx->ppp_sgl[0]), tctx->ppp_buffer, PPP_BUF_SIZE);
+ dma_map_count++;
+ rc = spacc_sg_to_ddt(dev, &(tctx->ppp_sgl[0]),
+ tctx->ppp_sgl[0].length,
+ &ctx->src, DMA_TO_DEVICE);
+
+ } else if (ctx->total_nents == 0 && !ctx->single_shot) {
+ /* INIT-FINUP sequence */
+ spacc_ctx_clone_handle(req);
+ dma_map_count++;
+ rc = spacc_sg_to_ddt(dev, req->src, req->nbytes,
+ &ctx->src, DMA_TO_DEVICE);
+ } else {
+ }
+
+ if (rc < 0)
+ goto err_free_dst;
+
+ ctx->src_nents = rc;
+
+ return rc;
+
+err_free_dst:
+ pdu_ddt_free(&ctx->dst);
+err_free_digest:
+ dma_pool_free(spacc_hash_pool, ctx->digest_buf, ctx->digest_dma);
+
+ return rc;
+}
+
+static void spacc_ppp_free(struct spacc_crypto_reqctx *ctx,
+ struct spacc_crypto_ctx *tctx,
+ struct ahash_request *req)
+{
+ if (tctx->ppp_sgl) {
+ kfree(NULL);
+ tctx->ppp_sgl = NULL;
+ }
+
+ ctx->final_part_pck = 0;
+ ctx->single_shot = 0;
+ spacc_hash_cleanup_ppp(req);
+}
+
+
+static void spacc_free_mems(struct spacc_crypto_reqctx *ctx,
+ struct spacc_crypto_ctx *tctx,
+ struct ahash_request *req)
+{
+ spacc_hash_cleanup_dma_dst(tctx, req);
+ spacc_hash_cleanup_dma_src(tctx, req);
+
+ if (ctx->final_part_pck || ctx->single_shot)
+ spacc_ppp_free(ctx, tctx, req);
+
+}
+
+static void spacc_digest_cb(void *spacc, void *tfm)
+{
+ struct ahash_cb_data *cb = tfm;
+ int err = -1;
+ int dig_sz;
+
+ dig_sz = crypto_ahash_digestsize(crypto_ahash_reqtfm(cb->req));
+
+ if (cb->ctx->single_shot || cb->ctx->final_part_pck)
+ memcpy(cb->req->result, cb->ctx->digest_buf, dig_sz);
+ else
+ memcpy(cb->tctx->digest_ctx_buf, cb->ctx->digest_buf, dig_sz);
+
+ err = cb->spacc->job[cb->new_handle].job_err;
+
+ dma_pool_free(spacc_hash_pool, cb->ctx->digest_buf, cb->ctx->digest_dma);
+ //FIXME: cb->ctx->digest_buf = NULL;
+ spacc_free_mems(cb->ctx, cb->tctx, cb->req);
+ spacc_close(cb->spacc, cb->new_handle);
+
+
+ /* call complete once at the end */
+ if (cb->req->base.complete)
+ ahash_request_complete(cb->req, err);
+}
+
+static int do_shash(unsigned char *name, unsigned char *result,
+ const u8 *data1, unsigned int data1_len,
+ const u8 *data2, unsigned int data2_len,
+ const u8 *key, unsigned int key_len)
+{
+ int rc;
+ unsigned int size;
+ struct crypto_shash *hash;
+ struct sdesc *sdesc;
+
+ hash = crypto_alloc_shash(name, 0, 0);
+ if (IS_ERR(hash)) {
+ rc = PTR_ERR(hash);
+ pr_err("ERR: Crypto %s allocation error %d\n", name, rc);
+ return rc;
+ }
+
+ size = sizeof(struct shash_desc) + crypto_shash_descsize(hash);
+ sdesc = kmalloc(size, GFP_KERNEL);
+ if (!sdesc) {
+ rc = -ENOMEM;
+ goto do_shash_err;
+ }
+ sdesc->shash.tfm = hash;
+
+ if (key_len > 0) {
+ rc = crypto_shash_setkey(hash, key, key_len);
+ if (rc) {
+ pr_err("ERR: Could not setkey %s shash\n", name);
+ goto do_shash_err;
+ }
+ }
+
+ rc = crypto_shash_init(&sdesc->shash);
+ if (rc) {
+ pr_err("ERR: Could not init %s shash\n", name);
+ goto do_shash_err;
+ }
+
+ rc = crypto_shash_update(&sdesc->shash, data1, data1_len);
+ if (rc) {
+ pr_err("ERR: Could not update1\n");
+ goto do_shash_err;
+ }
+
+ if (data2 && data2_len) {
+ rc = crypto_shash_update(&sdesc->shash, data2, data2_len);
+ if (rc) {
+ pr_err("ERR: Could not update2\n");
+ goto do_shash_err;
+ }
+ }
+
+ rc = crypto_shash_final(&sdesc->shash, result);
+ if (rc)
+ pr_err("ERR: Could not generate %s hash\n", name);
+
+do_shash_err:
+ crypto_free_shash(hash);
+ kfree(sdesc);
+
+ return rc;
+}
+
+static int spacc_hash_setkey(struct crypto_ahash *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ int x, rc;
+ const struct spacc_alg *salg = spacc_tfm_ahash(&tfm->base);
+ struct spacc_crypto_ctx *tctx = crypto_ahash_ctx(tfm);
+ struct spacc_priv *priv = dev_get_drvdata(tctx->dev);
+ unsigned int digest_size, block_size;
+ char hash_alg[CRYPTO_MAX_ALG_NAME];
+
+ block_size = crypto_tfm_alg_blocksize(&tfm->base);
+ digest_size = crypto_ahash_digestsize(tfm);
+
+ /*
+ * If keylen > hash block len, the key is supposed to be hashed so that
+ * it is less than the block length. This is kind of a useless
+ * property of HMAC as you can just use that hash as the key directly.
+ * We will just not use the hardware in this case to avoid the issue.
+ * This test was meant for hashes but it works for cmac/xcbc since we
+ * only intend to support 128-bit keys...
+ */
+
+ if (keylen > block_size && salg->mode->id != CRYPTO_MODE_MAC_CMAC) {
+ dev_dbg(salg->dev[0], "Exceeds keylen: %u\n", keylen);
+ dev_dbg(salg->dev[0], "Req. keylen hashing %s\n",
+ salg->calg->cra_name);
+
+ memset(hash_alg, 0x00, CRYPTO_MAX_ALG_NAME);
+ switch (salg->mode->id) {
+ case CRYPTO_MODE_HMAC_SHA224:
+ rc = do_shash("sha224", tctx->ipad, key, keylen,
+ NULL, 0, NULL, 0);
+ break;
+
+ case CRYPTO_MODE_HMAC_SHA256:
+ rc = do_shash("sha256", tctx->ipad, key, keylen,
+ NULL, 0, NULL, 0);
+ break;
+
+ case CRYPTO_MODE_HMAC_SHA384:
+ rc = do_shash("sha384", tctx->ipad, key, keylen,
+ NULL, 0, NULL, 0);
+ break;
+
+ case CRYPTO_MODE_HMAC_SHA512:
+ rc = do_shash("sha512", tctx->ipad, key, keylen,
+ NULL, 0, NULL, 0);
+ break;
+
+ case CRYPTO_MODE_HMAC_MD5:
+ rc = do_shash("md5", tctx->ipad, key, keylen,
+ NULL, 0, NULL, 0);
+ break;
+
+ case CRYPTO_MODE_HMAC_SHA1:
+ rc = do_shash("sha1", tctx->ipad, key, keylen,
+ NULL, 0, NULL, 0);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ if (rc < 0) {
+ pr_err("ERR: %d computing shash for %s\n",
+ rc, hash_alg);
+ return -EIO;
+ }
+
+ keylen = digest_size;
+ dev_dbg(salg->dev[0], "updated keylen: %u\n", keylen);
+ } else
+ memcpy(tctx->ipad, key, keylen);
+
+ tctx->ctx_valid = false;
+
+ if (salg->mode->sw_fb) {
+ rc = crypto_ahash_setkey(tctx->fb.hash, key, keylen);
+ if (rc < 0)
+ return rc;
+ }
+
+ /* close handle since key size may have changed */
+ if (tctx->handle >= 0) {
+ spacc_close(&priv->spacc, tctx->handle);
+ put_device(tctx->dev);
+ tctx->handle = -1;
+ tctx->dev = NULL;
+ }
+
+ priv = NULL;
+ for (x = 0; x < ELP_CAPI_MAX_DEV && salg->dev[x]; x++) {
+ priv = dev_get_drvdata(salg->dev[x]);
+ tctx->dev = get_device(salg->dev[x]);
+ if (spacc_isenabled(&priv->spacc, salg->mode->id, keylen)) {
+ tctx->handle = spacc_open(&priv->spacc,
+ CRYPTO_MODE_NULL,
+ salg->mode->id, -1,
+ 0, spacc_digest_cb, tfm);
+
+ } else
+ pr_debug(" Keylen: %d not enabled for algo: %d",
+ keylen, salg->mode->id);
+
+ if (tctx->handle >= 0)
+ break;
+
+ put_device(salg->dev[x]);
+ }
+
+ if (tctx->handle < 0) {
+ pr_err("ERR: Failed to open SPAcc context\n");
+ dev_dbg(salg->dev[0], "Failed to open SPAcc context\n");
+ return -EIO;
+ }
+
+ rc = spacc_set_operation(&priv->spacc, tctx->handle, OP_ENCRYPT,
+ ICV_HASH, IP_ICV_OFFSET, 0, 0, 0);
+ if (rc < 0) {
+ spacc_close(&priv->spacc, tctx->handle);
+ tctx->handle = -1;
+ put_device(tctx->dev);
+ return -EIO;
+ }
+
+ if (salg->mode->id == CRYPTO_MODE_MAC_XCBC ||
+ salg->mode->id == CRYPTO_MODE_MAC_SM4_XCBC) {
+ rc = spacc_compute_xcbc_key(&priv->spacc, salg->mode->id,
+ tctx->handle, tctx->ipad,
+ keylen, tctx->ipad);
+ if (rc < 0) {
+ dev_warn(tctx->dev,
+ "Failed to compute XCBC key: %d\n", rc);
+ return -EIO;
+ }
+ rc = spacc_write_context(&priv->spacc, tctx->handle,
+ SPACC_HASH_OPERATION, tctx->ipad,
+ 32 + keylen, NULL, 0);
+ } else {
+ rc = spacc_write_context(&priv->spacc, tctx->handle,
+ SPACC_HASH_OPERATION, tctx->ipad,
+ keylen, NULL, 0);
+ }
+
+ memset(tctx->ipad, 0, sizeof(tctx->ipad));
+ if (rc < 0) {
+ pr_err("ERR: Failed to write SPAcc context\n");
+ dev_warn(tctx->dev, "Failed to write SPAcc context %d: %d\n",
+ tctx->handle, rc);
+
+ /* Non-fatal; we continue with the software fallback. */
+ return 0;
+ }
+
+ tctx->ctx_valid = true;
+
+ return 0;
+}
+
+static int spacc_hash_cra_init(struct crypto_tfm *tfm)
+{
+ const struct spacc_alg *salg = spacc_tfm_ahash(tfm);
+ struct spacc_crypto_ctx *tctx = crypto_tfm_ctx(tfm);
+ struct spacc_priv *priv = NULL;
+
+ tctx->handle = -1;
+ tctx->ctx_valid = false;
+ tctx->flag_ppp = 0;
+ tctx->dev = get_device(salg->dev[0]);
+
+ if (salg->mode->sw_fb) {
+ tctx->fb.hash = crypto_alloc_ahash(salg->calg->cra_name, 0,
+ CRYPTO_ALG_NEED_FALLBACK);
+
+ if (IS_ERR(tctx->fb.hash)) {
+ if (tctx->handle >= 0)
+ spacc_close(&priv->spacc, tctx->handle);
+ put_device(tctx->dev);
+ return PTR_ERR(tctx->fb.hash);
+ }
+
+ crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
+ sizeof(struct spacc_crypto_reqctx) +
+ crypto_ahash_reqsize(tctx->fb.hash));
+
+ } else {
+ crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
+ sizeof(struct spacc_crypto_reqctx));
+ }
+
+ return 0;
+}
+
+static void spacc_hash_cra_exit(struct crypto_tfm *tfm)
+{
+ struct spacc_crypto_ctx *tctx = crypto_tfm_ctx(tfm);
+ struct spacc_priv *priv = dev_get_drvdata(tctx->dev);
+
+ crypto_free_ahash(tctx->fb.hash);
+
+ if (tctx->handle >= 0)
+ spacc_close(&priv->spacc, tctx->handle);
+
+ put_device(tctx->dev);
+}
+
+static int spacc_hash_init(struct ahash_request *req)
+{
+ int x = 0, rc = 0;
+ struct crypto_ahash *reqtfm = crypto_ahash_reqtfm(req);
+ struct spacc_crypto_ctx *tctx = crypto_ahash_ctx(reqtfm);
+ struct spacc_crypto_reqctx *ctx = ahash_request_ctx(req);
+ const struct spacc_alg *salg = spacc_tfm_ahash(&reqtfm->base);
+ struct spacc_priv *priv = dev_get_drvdata(tctx->dev);
+
+
+ ctx->digest_buf = NULL;
+
+ ctx->single_shot = 0;
+ ctx->total_nents = 0;
+ ctx->cur_part_pck = 0;
+ ctx->final_part_pck = 0;
+ ctx->rem_len = 0;
+ ctx->rem_nents = 0;
+ ctx->first_ppp_chunk = 1;
+ ctx->small_pck = 1;
+ tctx->ppp_sgl = NULL;
+
+ if (tctx->handle < 0 || !tctx->ctx_valid) {
+ priv = NULL;
+ dev_dbg(tctx->dev, "%s: open SPAcc context\n", __func__);
+
+ for (x = 0; x < ELP_CAPI_MAX_DEV && salg->dev[x]; x++) {
+ priv = dev_get_drvdata(salg->dev[x]);
+ tctx->dev = get_device(salg->dev[x]);
+ if (spacc_isenabled(&priv->spacc, salg->mode->id, 0)) {
+ tctx->handle = spacc_open(&priv->spacc,
+ CRYPTO_MODE_NULL,
+ salg->mode->id, -1, 0,
+ spacc_digest_cb, reqtfm);
+ }
+
+ if (tctx->handle >= 0)
+ break;
+
+ put_device(salg->dev[x]);
+ }
+
+ if (tctx->handle < 0) {
+ dev_dbg(salg->dev[0], "Failed to open SPAcc context\n");
+ goto fallback;
+ }
+
+ rc = spacc_set_operation(&priv->spacc, tctx->handle,
+ OP_ENCRYPT, ICV_HASH, IP_ICV_OFFSET,
+ 0, 0, 0);
+ if (rc < 0) {
+ spacc_close(&priv->spacc, tctx->handle);
+ dev_dbg(salg->dev[0], "Failed to open SPAcc context\n");
+ tctx->handle = -1;
+ put_device(tctx->dev);
+ goto fallback;
+ }
+ tctx->ctx_valid = true;
+ }
+
+ /* alloc ppp_sgl */
+ tctx->ppp_sgl = kmalloc(sizeof(*(tctx->ppp_sgl)) * 2, GFP_KERNEL);
+
+ if (!tctx->ppp_sgl)
+ return -ENOMEM;
+
+ sg_init_table(tctx->ppp_sgl, 2);
+ tctx->ppp_sgl[0].length = 0;
+
+ return 0;
+fallback:
+
+ ctx->fb.hash_req.base = req->base;
+ ahash_request_set_tfm(&ctx->fb.hash_req, tctx->fb.hash);
+
+ return crypto_ahash_init(&ctx->fb.hash_req);
+}
+
+static int spacc_hash_final_part_pck(struct ahash_request *req)
+{
+ struct crypto_ahash *reqtfm = crypto_ahash_reqtfm(req);
+ struct spacc_crypto_ctx *tctx = crypto_ahash_ctx(reqtfm);
+ struct spacc_crypto_reqctx *ctx = ahash_request_ctx(req);
+ struct spacc_priv *priv = dev_get_drvdata(tctx->dev);
+
+ int rc;
+
+ ctx->final_part_pck = 1;
+
+ /* In all the final calls the data is same as prev update and
+ * hence we can skip this init dma part and just enQ ddt
+ * No use in calling initdata, just process remaining bytes in ppp_sgl
+ * and be done with it.
+ */
+
+ rc = spacc_hash_init_dma(tctx->dev, req, 1);
+
+ if (rc < 0)
+ return -ENOMEM;
+
+ /* enqueue ddt for the remaining bytes of data, everything else
+ * would have been processed already, req->nbytes need not be
+ * processed
+ * Since this will hit only for small pkts, hence the condition
+ * ctx->rem_len-req->nbytes for the small pkt len
+ */
+ if (ctx->rem_len)
+ rc = spacc_packet_enqueue_ddt(&priv->spacc,
+ ctx->acb.new_handle, &ctx->src, &ctx->dst,
+ tctx->ppp_sgl[0].length,
+ 0, tctx->ppp_sgl[0].length, 0, 0, 0);
+ else {
+ /* zero msg handling */
+ rc = spacc_packet_enqueue_ddt(&priv->spacc,
+ ctx->acb.new_handle,
+ &ctx->src, &ctx->dst, 0, 0, 0, 0, 0, 0);
+ }
+
+ if (rc < 0) {
+ spacc_hash_cleanup_dma(tctx->dev, req);
+ spacc_close(&priv->spacc, ctx->acb.new_handle);
+
+ if (rc != -EBUSY) {
+ dev_err(tctx->dev, "ERR: Failed to enqueue job: %d\n", rc);
+ return rc;
+ }
+
+ if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG))
+ return -EBUSY;
+ }
+
+ return -EINPROGRESS;
+}
+
+static int spacc_hash_update(struct ahash_request *req)
+{
+ int rc;
+ int nents = sg_nents(req->src);
+ int nbytes = req->nbytes;
+
+ struct crypto_ahash *reqtfm = crypto_ahash_reqtfm(req);
+ struct spacc_crypto_ctx *tctx = crypto_ahash_ctx(reqtfm);
+ struct spacc_crypto_reqctx *ctx = ahash_request_ctx(req);
+ struct spacc_priv *priv = dev_get_drvdata(tctx->dev);
+
+ ctx->rem_nents += sg_nents_for_len(req->src, req->nbytes);
+
+ if (!nbytes)
+ return 0;
+
+
+ if (req->src) {
+ /* set partial packet flag */
+ ctx->cur_part_pck++;
+
+ if (ctx->total_nents == 0 && nents > 0) {
+ /* assigned once for a req */
+ ctx->total_nents = nents;
+ }
+ }
+
+ if (tctx->handle < 0 ||
+ !tctx->ctx_valid ||
+ nbytes > priv->max_msg_len) {
+ goto fallback;
+ }
+
+ rc = spacc_hash_init_dma(tctx->dev, req, 0);
+ if (rc < 0)
+ goto fallback;
+
+ if (rc == 0)
+ return 0;
+
+ /* assumption: update wont be getting a zero len */
+ rc = spacc_packet_enqueue_ddt(&priv->spacc, ctx->acb.new_handle,
+ &ctx->src, &ctx->dst,
+ tctx->ppp_sgl[0].length,
+ 0, tctx->ppp_sgl[0].length, 0, 0, 0);
+ if (rc < 0) {
+ spacc_hash_cleanup_dma(tctx->dev, req);
+ spacc_close(&priv->spacc, ctx->acb.new_handle);
+
+ if (rc != -EBUSY) {
+ dev_err(tctx->dev,
+ "ERR: Failed to enqueue job: %d\n", rc);
+ return rc;
+ } else if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG))
+ return -EBUSY;
+
+ goto fallback;
+ }
+
+ return -EINPROGRESS;
+
+fallback:
+ dev_dbg(tctx->dev, "%s Using SW fallback\n", __func__);
+
+ ctx->fb.hash_req.base.flags = req->base.flags;
+ ctx->fb.hash_req.nbytes = req->nbytes;
+ ctx->fb.hash_req.src = req->src;
+
+ return crypto_ahash_update(&ctx->fb.hash_req);
+}
+
+static int spacc_hash_final(struct ahash_request *req)
+{
+ struct crypto_ahash *reqtfm = crypto_ahash_reqtfm(req);
+ struct spacc_crypto_ctx *tctx = crypto_ahash_ctx(reqtfm);
+ struct spacc_crypto_reqctx *ctx = ahash_request_ctx(req);
+ struct ahash_cb_data *acb = &ctx->acb;
+ int err;
+
+ if (tctx->handle < 0 || !tctx->ctx_valid)
+ goto fallback;
+
+ ctx->final_part_pck = 1;
+
+ /* a corner case of final, where rem_len is 0, we dont proccess
+ * that 0-size chunk and send the prev computed hash
+ */
+ if (ctx->total_nents == ctx->rem_nents &&
+ ctx->rem_len == 0 &&
+ ctx->total_nents != 0) {
+
+ memcpy(req->result, acb->tctx->digest_ctx_buf,
+ crypto_ahash_digestsize(crypto_ahash_reqtfm(acb->req)));
+
+ err = acb->spacc->job[acb->new_handle].job_err;
+
+ /* cleanup everything before exiting on this path */
+ spacc_ppp_free(ctx, tctx, req);
+ spacc_close(acb->spacc, acb->new_handle);
+
+ return CRYPTO_OK;
+ }
+
+ if (ctx->total_nents || ctx->small_pck) {
+ err = spacc_hash_final_part_pck(req);
+ /* no returns from here, this is final, process everything
+ * and copy result/digest and exit from here
+ */
+
+ if (err == -ENOMEM) {
+ /* Hash init failed */
+ memcpy(req->result, acb->tctx->digest_ctx_buf,
+ crypto_ahash_digestsize(crypto_ahash_reqtfm(acb->req)));
+
+ err = acb->spacc->job[acb->new_handle].job_err;
+ spacc_close(acb->spacc, acb->new_handle);
+ //FIXME: Should this return 0 as done below? why?
+ err = CRYPTO_OK;
+ }
+
+ return err;
+ }
+
+ memcpy(req->result, acb->tctx->digest_ctx_buf,
+ crypto_ahash_digestsize(crypto_ahash_reqtfm(acb->req)));
+
+ err = acb->spacc->job[acb->new_handle].job_err;
+ spacc_close(acb->spacc, acb->new_handle);
+
+ return 0;
+
+fallback:
+ ctx->fb.hash_req.base.flags = req->base.flags;
+ ctx->fb.hash_req.result = req->result;
+
+ return crypto_ahash_final(&ctx->fb.hash_req);
+}
+
+static int spacc_hash_digest(struct ahash_request *req)
+{
+ int final = 0;
+ int rc, total_len = 0;
+ struct crypto_ahash *reqtfm = crypto_ahash_reqtfm(req);
+ struct spacc_crypto_ctx *tctx = crypto_ahash_ctx(reqtfm);
+ struct spacc_crypto_reqctx *ctx = ahash_request_ctx(req);
+ struct spacc_priv *priv = dev_get_drvdata(tctx->dev);
+
+ if (tctx->flag_ppp) {
+ /* from finup */
+ ctx->single_shot = 0;
+ ctx->final_part_pck = 1;
+ final = 2;
+ } else {
+ /* direct single shot digest call */
+ ctx->single_shot = 1;
+ ctx->final_part_pck = 0;
+ ctx->rem_len = 0;
+ ctx->total_nents = sg_nents(req->src);
+
+ /* alloc ppp_sgl */
+ tctx->ppp_sgl = kmalloc(sizeof(*(tctx->ppp_sgl)) * 2, GFP_KERNEL);
+
+ if (!tctx->ppp_sgl)
+ return -ENOMEM;
+
+ sg_init_table(tctx->ppp_sgl, 2);
+ tctx->ppp_sgl[0].length = 0;
+ }
+
+ rc = spacc_hash_init_dma(tctx->dev, req, final);
+ if (rc < 0)
+ goto fallback;
+
+ if (rc == 0)
+ return 0;
+
+ if (final) {
+ if (ctx->total_nents) {
+ /* INIT-UPDATE-UPDATE-FINUP/FINAL */
+ total_len = tctx->ppp_sgl[0].length;
+ } else if (req->src->length == 0 && ctx->total_nents == 0) {
+ /* zero msg handling */
+ total_len = 0;
+ } else {
+ /* handle INIT-FINUP sequence, process req->nbytes */
+ total_len = req->nbytes;
+ }
+
+ rc = spacc_packet_enqueue_ddt(&priv->spacc, ctx->acb.new_handle,
+ &ctx->src, &ctx->dst, total_len,
+ 0, total_len, 0, 0, 0);
+ } else {
+ rc = spacc_packet_enqueue_ddt(&priv->spacc, ctx->acb.new_handle,
+ &ctx->src, &ctx->dst, req->nbytes,
+ 0, req->nbytes, 0, 0, 0);
+ }
+
+ if (rc < 0) {
+ spacc_hash_cleanup_dma(tctx->dev, req);
+ spacc_close(&priv->spacc, ctx->acb.new_handle);
+
+ if (rc != -EBUSY) {
+ pr_debug("Failed to enqueue job, ERR: %d\n", rc);
+ return rc;
+ }
+
+ if (!(req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG))
+ return -EBUSY;
+
+ goto fallback;
+ }
+
+ return -EINPROGRESS;
+
+fallback:
+ /* Start from scratch as init is not called before digest */
+ ctx->fb.hash_req.base = req->base;
+ ahash_request_set_tfm(&ctx->fb.hash_req, tctx->fb.hash);
+
+ ctx->fb.hash_req.nbytes = total_len;
+ ctx->fb.hash_req.src = req->src;
+ ctx->fb.hash_req.result = req->result;
+
+ return crypto_ahash_digest(&ctx->fb.hash_req);
+}
+
+static int spacc_hash_finup(struct ahash_request *req)
+{
+ struct crypto_ahash *reqtfm = crypto_ahash_reqtfm(req);
+ struct spacc_crypto_ctx *tctx = crypto_ahash_ctx(reqtfm);
+ struct spacc_crypto_reqctx *ctx = ahash_request_ctx(req);
+ int rc;
+
+ if (tctx->handle < 0 || !tctx->ctx_valid)
+ goto fallback;
+
+ /* set this flag for rem_len usage */
+ tctx->flag_ppp = 1;
+ rc = spacc_hash_digest(req);
+ return rc;
+
+fallback:
+ ctx->fb.hash_req.base.flags = req->base.flags;
+ ctx->fb.hash_req.nbytes = req->nbytes;
+ ctx->fb.hash_req.src = req->src;
+ ctx->fb.hash_req.result = req->result;
+
+ return crypto_ahash_finup(&ctx->fb.hash_req);
+}
+
+static int spacc_hash_import(struct ahash_request *req, const void *in)
+{
+ struct spacc_crypto_reqctx *ctx = ahash_request_ctx(req);
+
+ memcpy(ctx, in, sizeof(*ctx));
+
+ return 0;
+}
+
+static int spacc_hash_export(struct ahash_request *req, void *out)
+{
+ const struct spacc_crypto_reqctx *ctx = ahash_request_ctx(req);
+
+ memcpy(out, ctx, sizeof(*ctx));
+
+ return 0;
+}
+
+static const struct ahash_alg spacc_hash_template = {
+ .init = spacc_hash_init,
+ .update = spacc_hash_update,
+ .final = spacc_hash_final,
+ .finup = spacc_hash_finup,
+ .digest = spacc_hash_digest,
+ .setkey = spacc_hash_setkey,
+ .export = spacc_hash_export,
+ .import = spacc_hash_import,
+
+ .halg.base = {
+ .cra_priority = 300,
+ .cra_module = THIS_MODULE,
+ .cra_init = spacc_hash_cra_init,
+ .cra_exit = spacc_hash_cra_exit,
+ .cra_ctxsize = sizeof(struct spacc_crypto_ctx),
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_NEED_FALLBACK |
+ CRYPTO_ALG_OPTIONAL_KEY
+ },
+};
+
+static int spacc_register_hash(struct spacc_alg *salg)
+{
+ int rc;
+
+ salg->calg = &salg->alg.hash.halg.base;
+ salg->alg.hash = spacc_hash_template;
+
+ spacc_init_calg(salg->calg, salg->mode);
+ salg->alg.hash.halg.digestsize = salg->mode->hashlen;
+ salg->alg.hash.halg.statesize = sizeof(struct spacc_crypto_reqctx);
+
+ rc = crypto_register_ahash(&salg->alg.hash);
+ if (rc < 0)
+ return rc;
+
+ mutex_lock(&spacc_hash_alg_mutex);
+ list_add(&salg->list, &spacc_hash_alg_list);
+ mutex_unlock(&spacc_hash_alg_mutex);
+
+ return 0;
+}
+
+int probe_hashes(struct platform_device *spacc_pdev)
+{
+ int rc;
+ unsigned int i;
+ int registered = 0;
+ struct spacc_alg *salg;
+ struct spacc_priv *priv = dev_get_drvdata(&spacc_pdev->dev);
+
+ spacc_hash_pool = dma_pool_create("spacc-digest", &spacc_pdev->dev,
+ SPACC_MAX_DIGEST_SIZE,
+ SPACC_DMA_ALIGN, SPACC_DMA_BOUNDARY);
+
+ if (!spacc_hash_pool)
+ return -ENOMEM;
+
+ for (i = 0; i < ARRAY_SIZE(possible_hashes); i++)
+ possible_hashes[i].valid = 0;
+
+ for (i = 0; i < ARRAY_SIZE(possible_hashes); i++) {
+ if (possible_hashes[i].valid == 0 &&
+ spacc_isenabled(&priv->spacc,
+ possible_hashes[i].id & 0xFF,
+ possible_hashes[i].hashlen)) {
+
+ salg = kmalloc(sizeof(*salg), GFP_KERNEL);
+ if (!salg)
+ return -ENOMEM;
+
+ salg->mode = &possible_hashes[i];
+
+ /* Copy all dev's over to the salg */
+ salg->dev[0] = &spacc_pdev->dev;
+ salg->dev[1] = NULL;
+
+ rc = spacc_register_hash(salg);
+ if (rc < 0) {
+ kfree(salg);
+ continue;
+ }
+ dev_dbg(&spacc_pdev->dev, "registered %s\n",
+ possible_hashes[i].name);
+
+ registered++;
+ possible_hashes[i].valid = 1;
+ }
+ }
+
+ return registered;
+}
+
+int spacc_unregister_hash_algs(void)
+{
+ struct spacc_alg *salg, *tmp;
+
+ mutex_lock(&spacc_hash_alg_mutex);
+ list_for_each_entry_safe(salg, tmp, &spacc_hash_alg_list, list) {
+ crypto_unregister_alg(salg->calg);
+ list_del(&salg->list);
+ kfree(salg);
+ }
+ mutex_unlock(&spacc_hash_alg_mutex);
+
+ dma_pool_destroy(spacc_hash_pool);
+
+ return 0;
+}
--
2.25.1
