*
* Support for SAHARA cryptographic accelerator.
*
+ * Copyright (c) 2014 Steffen Trumtrar <s.trumtrar@pengutronix.de>
* Copyright (c) 2013 Vista Silicon S.L.
* Author: Javier Martin <javier.martin@vista-silicon.com>
*
#include <crypto/algapi.h>
#include <crypto/aes.h>
+#include <crypto/hash.h>
+#include <crypto/internal/hash.h>
+#include <crypto/scatterwalk.h>
+#include <crypto/sha.h>
#include <linux/clk.h>
#include <linux/crypto.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
+#define SHA_BUFFER_LEN PAGE_SIZE
+#define SAHARA_MAX_SHA_BLOCK_SIZE SHA256_BLOCK_SIZE
+
#define SAHARA_NAME "sahara"
#define SAHARA_VERSION_3 3
#define SAHARA_VERSION_4 4
#define SAHARA_HDR_CHA_MDHA (2 << 28)
#define SAHARA_HDR_PARITY_BIT (1 << 31)
+#define SAHARA_HDR_MDHA_SET_MODE_MD_KEY 0x20880000
+#define SAHARA_HDR_MDHA_SET_MODE_HASH 0x208D0000
+#define SAHARA_HDR_MDHA_HASH 0xA0850000
+#define SAHARA_HDR_MDHA_STORE_DIGEST 0x20820000
+#define SAHARA_HDR_MDHA_ALG_SHA1 0
+#define SAHARA_HDR_MDHA_ALG_MD5 1
+#define SAHARA_HDR_MDHA_ALG_SHA256 2
+#define SAHARA_HDR_MDHA_ALG_SHA224 3
+#define SAHARA_HDR_MDHA_PDATA (1 << 2)
+#define SAHARA_HDR_MDHA_HMAC (1 << 3)
+#define SAHARA_HDR_MDHA_INIT (1 << 5)
+#define SAHARA_HDR_MDHA_IPAD (1 << 6)
+#define SAHARA_HDR_MDHA_OPAD (1 << 7)
+#define SAHARA_HDR_MDHA_SWAP (1 << 8)
+#define SAHARA_HDR_MDHA_MAC_FULL (1 << 9)
+#define SAHARA_HDR_MDHA_SSL (1 << 10)
+
/* SAHARA can only process one request at a time */
#define SAHARA_QUEUE_LENGTH 1
struct sahara_ctx {
unsigned long flags;
+
+ /* AES-specific context */
int keylen;
u8 key[AES_KEYSIZE_128];
struct crypto_ablkcipher *fallback;
+
+ /* SHA-specific context */
+ struct crypto_shash *shash_fallback;
};
struct sahara_aes_reqctx {
unsigned long mode;
};
+/*
+ * struct sahara_sha_reqctx - private data per request
+ * @buf: holds data for requests smaller than block_size
+ * @rembuf: used to prepare one block_size-aligned request
+ * @context: hw-specific context for request. Digest is extracted from this
+ * @mode: specifies what type of hw-descriptor needs to be built
+ * @digest_size: length of digest for this request
+ * @context_size: length of hw-context for this request.
+ * Always digest_size + 4
+ * @buf_cnt: number of bytes saved in buf
+ * @sg_in_idx: number of hw links
+ * @in_sg: scatterlist for input data
+ * @in_sg_chain: scatterlists for chained input data
+ * @in_sg_chained: specifies if chained scatterlists are used or not
+ * @total: total number of bytes for transfer
+ * @last: is this the last block
+ * @first: is this the first block
+ * @active: inside a transfer
+ */
+struct sahara_sha_reqctx {
+ u8 buf[SAHARA_MAX_SHA_BLOCK_SIZE];
+ u8 rembuf[SAHARA_MAX_SHA_BLOCK_SIZE];
+ u8 context[SHA256_DIGEST_SIZE + 4];
+ struct mutex mutex;
+ unsigned int mode;
+ unsigned int digest_size;
+ unsigned int context_size;
+ unsigned int buf_cnt;
+ unsigned int sg_in_idx;
+ struct scatterlist *in_sg;
+ struct scatterlist in_sg_chain[2];
+ bool in_sg_chained;
+ size_t total;
+ unsigned int last;
+ unsigned int first;
+ unsigned int active;
+};
+
struct sahara_dev {
struct device *device;
unsigned int version;
u8 *iv_base;
dma_addr_t iv_phys_base;
+ u8 *context_base;
+ dma_addr_t context_phys_base;
+
struct sahara_hw_link *hw_link[SAHARA_MAX_HW_LINK];
dma_addr_t hw_phys_link[SAHARA_MAX_HW_LINK];
ctx->fallback = NULL;
}
+static u32 sahara_sha_init_hdr(struct sahara_dev *dev,
+ struct sahara_sha_reqctx *rctx)
+{
+ u32 hdr = 0;
+
+ hdr = rctx->mode;
+
+ if (rctx->first) {
+ hdr |= SAHARA_HDR_MDHA_SET_MODE_HASH;
+ hdr |= SAHARA_HDR_MDHA_INIT;
+ } else {
+ hdr |= SAHARA_HDR_MDHA_SET_MODE_MD_KEY;
+ }
+
+ if (rctx->last)
+ hdr |= SAHARA_HDR_MDHA_PDATA;
+
+ if (hweight_long(hdr) % 2 == 0)
+ hdr |= SAHARA_HDR_PARITY_BIT;
+
+ return hdr;
+}
+
+static int sahara_sha_hw_links_create(struct sahara_dev *dev,
+ struct sahara_sha_reqctx *rctx,
+ int start)
+{
+ struct scatterlist *sg;
+ unsigned int i;
+ int ret;
+
+ dev->in_sg = rctx->in_sg;
+
+ dev->nb_in_sg = sahara_sg_length(dev->in_sg, rctx->total);
+ if ((dev->nb_in_sg) > SAHARA_MAX_HW_LINK) {
+ dev_err(dev->device, "not enough hw links (%d)\n",
+ dev->nb_in_sg + dev->nb_out_sg);
+ return -EINVAL;
+ }
+
+ if (rctx->in_sg_chained) {
+ i = start;
+ sg = dev->in_sg;
+ while (sg) {
+ ret = dma_map_sg(dev->device, sg, 1,
+ DMA_TO_DEVICE);
+ if (!ret)
+ return -EFAULT;
+
+ dev->hw_link[i]->len = sg->length;
+ dev->hw_link[i]->p = sg->dma_address;
+ dev->hw_link[i]->next = dev->hw_phys_link[i + 1];
+ sg = sg_next(sg);
+ i += 1;
+ }
+ dev->hw_link[i-1]->next = 0;
+ } else {
+ sg = dev->in_sg;
+ ret = dma_map_sg(dev->device, dev->in_sg, dev->nb_in_sg,
+ DMA_TO_DEVICE);
+ if (!ret)
+ return -EFAULT;
+
+ for (i = start; i < dev->nb_in_sg + start; i++) {
+ dev->hw_link[i]->len = sg->length;
+ dev->hw_link[i]->p = sg->dma_address;
+ if (i == (dev->nb_in_sg + start - 1)) {
+ dev->hw_link[i]->next = 0;
+ } else {
+ dev->hw_link[i]->next = dev->hw_phys_link[i + 1];
+ sg = sg_next(sg);
+ }
+ }
+ }
+
+ return i;
+}
+
+static int sahara_sha_hw_data_descriptor_create(struct sahara_dev *dev,
+ struct sahara_sha_reqctx *rctx,
+ struct ahash_request *req,
+ int index)
+{
+ unsigned result_len;
+ int i = index;
+
+ if (rctx->first)
+ /* Create initial descriptor: #8*/
+ dev->hw_desc[index]->hdr = sahara_sha_init_hdr(dev, rctx);
+ else
+ /* Create hash descriptor: #10. Must follow #6. */
+ dev->hw_desc[index]->hdr = SAHARA_HDR_MDHA_HASH;
+
+ dev->hw_desc[index]->len1 = rctx->total;
+ if (dev->hw_desc[index]->len1 == 0) {
+ /* if len1 is 0, p1 must be 0, too */
+ dev->hw_desc[index]->p1 = 0;
+ rctx->sg_in_idx = 0;
+ } else {
+ /* Create input links */
+ dev->hw_desc[index]->p1 = dev->hw_phys_link[index];
+ i = sahara_sha_hw_links_create(dev, rctx, index);
+
+ rctx->sg_in_idx = index;
+ if (i < 0)
+ return i;
+ }
+
+ dev->hw_desc[index]->p2 = dev->hw_phys_link[i];
+
+ /* Save the context for the next operation */
+ result_len = rctx->context_size;
+ dev->hw_link[i]->p = dev->context_phys_base;
+
+ dev->hw_link[i]->len = result_len;
+ dev->hw_desc[index]->len2 = result_len;
+
+ dev->hw_link[i]->next = 0;
+
+ return 0;
+}
+
+/*
+ * Load descriptor aka #6
+ *
+ * To load a previously saved context back to the MDHA unit
+ *
+ * p1: Saved Context
+ * p2: NULL
+ *
+ */
+static int sahara_sha_hw_context_descriptor_create(struct sahara_dev *dev,
+ struct sahara_sha_reqctx *rctx,
+ struct ahash_request *req,
+ int index)
+{
+ dev->hw_desc[index]->hdr = sahara_sha_init_hdr(dev, rctx);
+
+ dev->hw_desc[index]->len1 = rctx->context_size;
+ dev->hw_desc[index]->p1 = dev->hw_phys_link[index];
+ dev->hw_desc[index]->len2 = 0;
+ dev->hw_desc[index]->p2 = 0;
+
+ dev->hw_link[index]->len = rctx->context_size;
+ dev->hw_link[index]->p = dev->context_phys_base;
+ dev->hw_link[index]->next = 0;
+
+ return 0;
+}
+
+static int sahara_walk_and_recalc(struct scatterlist *sg, unsigned int nbytes)
+{
+ if (!sg || !sg->length)
+ return nbytes;
+
+ while (nbytes && sg) {
+ if (nbytes <= sg->length) {
+ sg->length = nbytes;
+ sg_mark_end(sg);
+ break;
+ }
+ nbytes -= sg->length;
+ sg = scatterwalk_sg_next(sg);
+ }
+
+ return nbytes;
+}
+
+static int sahara_sha_prepare_request(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct sahara_sha_reqctx *rctx = ahash_request_ctx(req);
+ unsigned int hash_later;
+ unsigned int block_size;
+ unsigned int len;
+
+ block_size = crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
+
+ /* append bytes from previous operation */
+ len = rctx->buf_cnt + req->nbytes;
+
+ /* only the last transfer can be padded in hardware */
+ if (!rctx->last && (len < block_size)) {
+ /* to few data, save for next operation */
+ scatterwalk_map_and_copy(rctx->buf + rctx->buf_cnt, req->src,
+ 0, req->nbytes, 0);
+ rctx->buf_cnt += req->nbytes;
+
+ return 0;
+ }
+
+ /* add data from previous operation first */
+ if (rctx->buf_cnt)
+ memcpy(rctx->rembuf, rctx->buf, rctx->buf_cnt);
+
+ /* data must always be a multiple of block_size */
+ hash_later = rctx->last ? 0 : len & (block_size - 1);
+ if (hash_later) {
+ unsigned int offset = req->nbytes - hash_later;
+ /* Save remaining bytes for later use */
+ scatterwalk_map_and_copy(rctx->buf, req->src, offset,
+ hash_later, 0);
+ }
+
+ /* nbytes should now be multiple of blocksize */
+ req->nbytes = req->nbytes - hash_later;
+
+ sahara_walk_and_recalc(req->src, req->nbytes);
+
+ /* have data from previous operation and current */
+ if (rctx->buf_cnt && req->nbytes) {
+ sg_init_table(rctx->in_sg_chain, 2);
+ sg_set_buf(rctx->in_sg_chain, rctx->rembuf, rctx->buf_cnt);
+
+ scatterwalk_sg_chain(rctx->in_sg_chain, 2, req->src);
+
+ rctx->total = req->nbytes + rctx->buf_cnt;
+ rctx->in_sg = rctx->in_sg_chain;
+
+ rctx->in_sg_chained = true;
+ req->src = rctx->in_sg_chain;
+ /* only data from previous operation */
+ } else if (rctx->buf_cnt) {
+ if (req->src)
+ rctx->in_sg = req->src;
+ else
+ rctx->in_sg = rctx->in_sg_chain;
+ /* buf was copied into rembuf above */
+ sg_init_one(rctx->in_sg, rctx->rembuf, rctx->buf_cnt);
+ rctx->total = rctx->buf_cnt;
+ rctx->in_sg_chained = false;
+ /* no data from previous operation */
+ } else {
+ rctx->in_sg = req->src;
+ rctx->total = req->nbytes;
+ req->src = rctx->in_sg;
+ rctx->in_sg_chained = false;
+ }
+
+ /* on next call, we only have the remaining data in the buffer */
+ rctx->buf_cnt = hash_later;
+
+ return -EINPROGRESS;
+}
+
+static void sahara_sha_unmap_sg(struct sahara_dev *dev,
+ struct sahara_sha_reqctx *rctx)
+{
+ struct scatterlist *sg;
+
+ if (rctx->in_sg_chained) {
+ sg = dev->in_sg;
+ while (sg) {
+ dma_unmap_sg(dev->device, sg, 1, DMA_TO_DEVICE);
+ sg = sg_next(sg);
+ }
+ } else {
+ dma_unmap_sg(dev->device, dev->in_sg, dev->nb_in_sg,
+ DMA_TO_DEVICE);
+ }
+}
+
+static int sahara_sha_process(struct ahash_request *req)
+{
+ struct sahara_dev *dev = dev_ptr;
+ struct sahara_sha_reqctx *rctx = ahash_request_ctx(req);
+ int ret = -EINPROGRESS;
+
+ ret = sahara_sha_prepare_request(req);
+ if (!ret)
+ return ret;
+
+ if (rctx->first) {
+ sahara_sha_hw_data_descriptor_create(dev, rctx, req, 0);
+ dev->hw_desc[0]->next = 0;
+ rctx->first = 0;
+ } else {
+ memcpy(dev->context_base, rctx->context, rctx->context_size);
+
+ sahara_sha_hw_context_descriptor_create(dev, rctx, req, 0);
+ dev->hw_desc[0]->next = dev->hw_phys_desc[1];
+ sahara_sha_hw_data_descriptor_create(dev, rctx, req, 1);
+ dev->hw_desc[1]->next = 0;
+ }
+
+ sahara_dump_descriptors(dev);
+ sahara_dump_links(dev);
+
+ reinit_completion(&dev->dma_completion);
+
+ sahara_write(dev, dev->hw_phys_desc[0], SAHARA_REG_DAR);
+
+ ret = wait_for_completion_timeout(&dev->dma_completion,
+ msecs_to_jiffies(SAHARA_TIMEOUT_MS));
+ if (!ret) {
+ dev_err(dev->device, "SHA timeout\n");
+ return -ETIMEDOUT;
+ }
+
+ if (rctx->sg_in_idx)
+ sahara_sha_unmap_sg(dev, rctx);
+
+ memcpy(rctx->context, dev->context_base, rctx->context_size);
+
+ if (req->result)
+ memcpy(req->result, rctx->context, rctx->digest_size);
+
+ return 0;
+}
+
static int sahara_queue_manage(void *data)
{
struct sahara_dev *dev = (struct sahara_dev *)data;
mutex_unlock(&dev->queue_mutex);
if (async_req) {
- struct ablkcipher_request *req =
- ablkcipher_request_cast(async_req);
+ if (crypto_tfm_alg_type(async_req->tfm) ==
+ CRYPTO_ALG_TYPE_AHASH) {
+ struct ahash_request *req =
+ ahash_request_cast(async_req);
+
+ ret = sahara_sha_process(req);
+ } else {
+ struct ablkcipher_request *req =
+ ablkcipher_request_cast(async_req);
- ret = sahara_aes_process(req);
+ ret = sahara_aes_process(req);
+ }
async_req->complete(async_req, ret);
return 0;
}
+static int sahara_sha_enqueue(struct ahash_request *req, int last)
+{
+ struct sahara_sha_reqctx *rctx = ahash_request_ctx(req);
+ struct sahara_dev *dev = dev_ptr;
+ int ret;
+
+ if (!req->nbytes && !last)
+ return 0;
+
+ mutex_lock(&rctx->mutex);
+ rctx->last = last;
+
+ if (!rctx->active) {
+ rctx->active = 1;
+ rctx->first = 1;
+ }
+
+ mutex_lock(&dev->queue_mutex);
+ ret = crypto_enqueue_request(&dev->queue, &req->base);
+ mutex_unlock(&dev->queue_mutex);
+
+ wake_up_process(dev->kthread);
+ mutex_unlock(&rctx->mutex);
+
+ return ret;
+}
+
+static int sahara_sha_init(struct ahash_request *req)
+{
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct sahara_sha_reqctx *rctx = ahash_request_ctx(req);
+
+ memset(rctx, 0, sizeof(*rctx));
+
+ switch (crypto_ahash_digestsize(tfm)) {
+ case SHA1_DIGEST_SIZE:
+ rctx->mode |= SAHARA_HDR_MDHA_ALG_SHA1;
+ rctx->digest_size = SHA1_DIGEST_SIZE;
+ break;
+ case SHA256_DIGEST_SIZE:
+ rctx->mode |= SAHARA_HDR_MDHA_ALG_SHA256;
+ rctx->digest_size = SHA256_DIGEST_SIZE;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ rctx->context_size = rctx->digest_size + 4;
+ rctx->active = 0;
+
+ mutex_init(&rctx->mutex);
+
+ return 0;
+}
+
+static int sahara_sha_update(struct ahash_request *req)
+{
+ return sahara_sha_enqueue(req, 0);
+}
+
+static int sahara_sha_final(struct ahash_request *req)
+{
+ req->nbytes = 0;
+ return sahara_sha_enqueue(req, 1);
+}
+
+static int sahara_sha_finup(struct ahash_request *req)
+{
+ return sahara_sha_enqueue(req, 1);
+}
+
+static int sahara_sha_digest(struct ahash_request *req)
+{
+ sahara_sha_init(req);
+
+ return sahara_sha_finup(req);
+}
+
+static int sahara_sha_export(struct ahash_request *req, void *out)
+{
+ struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+ struct sahara_ctx *ctx = crypto_ahash_ctx(ahash);
+ struct sahara_sha_reqctx *rctx = ahash_request_ctx(req);
+
+ memcpy(out, ctx, sizeof(struct sahara_ctx));
+ memcpy(out + sizeof(struct sahara_sha_reqctx), rctx,
+ sizeof(struct sahara_sha_reqctx));
+
+ return 0;
+}
+
+static int sahara_sha_import(struct ahash_request *req, const void *in)
+{
+ struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
+ struct sahara_ctx *ctx = crypto_ahash_ctx(ahash);
+ struct sahara_sha_reqctx *rctx = ahash_request_ctx(req);
+
+ memcpy(ctx, in, sizeof(struct sahara_ctx));
+ memcpy(rctx, in + sizeof(struct sahara_sha_reqctx),
+ sizeof(struct sahara_sha_reqctx));
+
+ return 0;
+}
+
+static int sahara_sha_cra_init(struct crypto_tfm *tfm)
+{
+ const char *name = crypto_tfm_alg_name(tfm);
+ struct sahara_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ ctx->shash_fallback = crypto_alloc_shash(name, 0,
+ CRYPTO_ALG_NEED_FALLBACK);
+ if (IS_ERR(ctx->shash_fallback)) {
+ pr_err("Error allocating fallback algo %s\n", name);
+ return PTR_ERR(ctx->shash_fallback);
+ }
+ crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
+ sizeof(struct sahara_sha_reqctx) +
+ SHA_BUFFER_LEN + SHA256_BLOCK_SIZE);
+
+ return 0;
+}
+
+static void sahara_sha_cra_exit(struct crypto_tfm *tfm)
+{
+ struct sahara_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ crypto_free_shash(ctx->shash_fallback);
+ ctx->shash_fallback = NULL;
+}
+
static struct crypto_alg aes_algs[] = {
{
.cra_name = "ecb(aes)",
}
};
+static struct ahash_alg sha_v3_algs[] = {
+{
+ .init = sahara_sha_init,
+ .update = sahara_sha_update,
+ .final = sahara_sha_final,
+ .finup = sahara_sha_finup,
+ .digest = sahara_sha_digest,
+ .export = sahara_sha_export,
+ .import = sahara_sha_import,
+ .halg.digestsize = SHA1_DIGEST_SIZE,
+ .halg.base = {
+ .cra_name = "sha1",
+ .cra_driver_name = "sahara-sha1",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_NEED_FALLBACK,
+ .cra_blocksize = SHA1_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct sahara_ctx),
+ .cra_alignmask = 0,
+ .cra_module = THIS_MODULE,
+ .cra_init = sahara_sha_cra_init,
+ .cra_exit = sahara_sha_cra_exit,
+ }
+},
+};
+
+static struct ahash_alg sha_v4_algs[] = {
+{
+ .init = sahara_sha_init,
+ .update = sahara_sha_update,
+ .final = sahara_sha_final,
+ .finup = sahara_sha_finup,
+ .digest = sahara_sha_digest,
+ .export = sahara_sha_export,
+ .import = sahara_sha_import,
+ .halg.digestsize = SHA256_DIGEST_SIZE,
+ .halg.base = {
+ .cra_name = "sha256",
+ .cra_driver_name = "sahara-sha256",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_AHASH |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_NEED_FALLBACK,
+ .cra_blocksize = SHA256_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct sahara_ctx),
+ .cra_alignmask = 0,
+ .cra_module = THIS_MODULE,
+ .cra_init = sahara_sha_cra_init,
+ .cra_exit = sahara_sha_cra_exit,
+ }
+},
+};
+
static irqreturn_t sahara_irq_handler(int irq, void *data)
{
struct sahara_dev *dev = (struct sahara_dev *)data;
static int sahara_register_algs(struct sahara_dev *dev)
{
- int err, i, j;
+ int err;
+ unsigned int i, j, k, l;
for (i = 0; i < ARRAY_SIZE(aes_algs); i++) {
INIT_LIST_HEAD(&aes_algs[i].cra_list);
goto err_aes_algs;
}
+ for (k = 0; k < ARRAY_SIZE(sha_v3_algs); k++) {
+ err = crypto_register_ahash(&sha_v3_algs[k]);
+ if (err)
+ goto err_sha_v3_algs;
+ }
+
+ if (dev->version > SAHARA_VERSION_3)
+ for (l = 0; l < ARRAY_SIZE(sha_v4_algs); l++) {
+ err = crypto_register_ahash(&sha_v4_algs[l]);
+ if (err)
+ goto err_sha_v4_algs;
+ }
+
return 0;
+err_sha_v4_algs:
+ for (j = 0; j < l; j++)
+ crypto_unregister_ahash(&sha_v4_algs[j]);
+
+err_sha_v3_algs:
+ for (j = 0; j < k; j++)
+ crypto_unregister_ahash(&sha_v4_algs[j]);
+
err_aes_algs:
for (j = 0; j < i; j++)
crypto_unregister_alg(&aes_algs[j]);
static void sahara_unregister_algs(struct sahara_dev *dev)
{
- int i;
+ unsigned int i;
for (i = 0; i < ARRAY_SIZE(aes_algs); i++)
crypto_unregister_alg(&aes_algs[i]);
+
+ for (i = 0; i < ARRAY_SIZE(sha_v4_algs); i++)
+ crypto_unregister_ahash(&sha_v3_algs[i]);
+
+ if (dev->version > SAHARA_VERSION_3)
+ for (i = 0; i < ARRAY_SIZE(sha_v4_algs); i++)
+ crypto_unregister_ahash(&sha_v4_algs[i]);
}
static struct platform_device_id sahara_platform_ids[] = {
dev->iv_base = dev->key_base + AES_KEYSIZE_128;
dev->iv_phys_base = dev->key_phys_base + AES_KEYSIZE_128;
+ /* Allocate space for context: largest digest + message length field */
+ dev->context_base = dma_alloc_coherent(&pdev->dev,
+ SHA256_DIGEST_SIZE + 4,
+ &dev->context_phys_base, GFP_KERNEL);
+ if (!dev->context_base) {
+ dev_err(&pdev->dev, "Could not allocate memory for MDHA context\n");
+ err = -ENOMEM;
+ goto err_key;
+ }
+
/* Allocate space for HW links */
dev->hw_link[0] = dma_alloc_coherent(&pdev->dev,
SAHARA_MAX_HW_LINK * sizeof(struct sahara_hw_link),
dma_free_coherent(&pdev->dev,
2 * AES_KEYSIZE_128,
dev->key_base, dev->key_phys_base);
+ dma_free_coherent(&pdev->dev,
+ SHA256_DIGEST_SIZE,
+ dev->context_base, dev->context_phys_base);
err_key:
dma_free_coherent(&pdev->dev,
SAHARA_MAX_HW_DESC * sizeof(struct sahara_hw_desc),
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com>");
+MODULE_AUTHOR("Steffen Trumtrar <s.trumtrar@pengutronix.de>");
MODULE_DESCRIPTION("SAHARA2 HW crypto accelerator");
projects / linux-beck.git / commitdiff