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path: root/drivers/crypto/img-hash.c
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Diffstat (limited to 'drivers/crypto/img-hash.c')
-rw-r--r--drivers/crypto/img-hash.c108
1 files changed, 98 insertions, 10 deletions
diff --git a/drivers/crypto/img-hash.c b/drivers/crypto/img-hash.c
index 68e8aa90fe01..a2e77b87485b 100644
--- a/drivers/crypto/img-hash.c
+++ b/drivers/crypto/img-hash.c
@@ -71,6 +71,7 @@
#define DRIVER_FLAGS_MD5 BIT(21)
#define IMG_HASH_QUEUE_LENGTH 20
+#define IMG_HASH_DMA_BURST 4
#define IMG_HASH_DMA_THRESHOLD 64
#ifdef __LITTLE_ENDIAN
@@ -102,8 +103,10 @@ struct img_hash_request_ctx {
unsigned long op;
size_t bufcnt;
- u8 buffer[0] __aligned(sizeof(u32));
struct ahash_request fallback_req;
+
+ /* Zero length buffer must remain last member of struct */
+ u8 buffer[0] __aligned(sizeof(u32));
};
struct img_hash_ctx {
@@ -340,7 +343,7 @@ static int img_hash_dma_init(struct img_hash_dev *hdev)
dma_conf.direction = DMA_MEM_TO_DEV;
dma_conf.dst_addr = hdev->bus_addr;
dma_conf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
- dma_conf.dst_maxburst = 16;
+ dma_conf.dst_maxburst = IMG_HASH_DMA_BURST;
dma_conf.device_fc = false;
err = dmaengine_slave_config(hdev->dma_lch, &dma_conf);
@@ -361,7 +364,7 @@ static void img_hash_dma_task(unsigned long d)
size_t nbytes, bleft, wsend, len, tbc;
struct scatterlist tsg;
- if (!ctx->sg)
+ if (!hdev->req || !ctx->sg)
return;
addr = sg_virt(ctx->sg);
@@ -587,6 +590,32 @@ static int img_hash_finup(struct ahash_request *req)
return crypto_ahash_finup(&rctx->fallback_req);
}
+static int img_hash_import(struct ahash_request *req, const void *in)
+{
+ struct img_hash_request_ctx *rctx = ahash_request_ctx(req);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct img_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+
+ ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback);
+ rctx->fallback_req.base.flags = req->base.flags
+ & CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ return crypto_ahash_import(&rctx->fallback_req, in);
+}
+
+static int img_hash_export(struct ahash_request *req, void *out)
+{
+ struct img_hash_request_ctx *rctx = ahash_request_ctx(req);
+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+ struct img_hash_ctx *ctx = crypto_ahash_ctx(tfm);
+
+ ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback);
+ rctx->fallback_req.base.flags = req->base.flags
+ & CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ return crypto_ahash_export(&rctx->fallback_req, out);
+}
+
static int img_hash_digest(struct ahash_request *req)
{
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
@@ -643,10 +672,9 @@ static int img_hash_digest(struct ahash_request *req)
return err;
}
-static int img_hash_cra_init(struct crypto_tfm *tfm)
+static int img_hash_cra_init(struct crypto_tfm *tfm, const char *alg_name)
{
struct img_hash_ctx *ctx = crypto_tfm_ctx(tfm);
- const char *alg_name = crypto_tfm_alg_name(tfm);
int err = -ENOMEM;
ctx->fallback = crypto_alloc_ahash(alg_name, 0,
@@ -658,6 +686,7 @@ static int img_hash_cra_init(struct crypto_tfm *tfm)
}
crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
sizeof(struct img_hash_request_ctx) +
+ crypto_ahash_reqsize(ctx->fallback) +
IMG_HASH_DMA_THRESHOLD);
return 0;
@@ -666,6 +695,26 @@ err:
return err;
}
+static int img_hash_cra_md5_init(struct crypto_tfm *tfm)
+{
+ return img_hash_cra_init(tfm, "md5-generic");
+}
+
+static int img_hash_cra_sha1_init(struct crypto_tfm *tfm)
+{
+ return img_hash_cra_init(tfm, "sha1-generic");
+}
+
+static int img_hash_cra_sha224_init(struct crypto_tfm *tfm)
+{
+ return img_hash_cra_init(tfm, "sha224-generic");
+}
+
+static int img_hash_cra_sha256_init(struct crypto_tfm *tfm)
+{
+ return img_hash_cra_init(tfm, "sha256-generic");
+}
+
static void img_hash_cra_exit(struct crypto_tfm *tfm)
{
struct img_hash_ctx *tctx = crypto_tfm_ctx(tfm);
@@ -711,9 +760,12 @@ static struct ahash_alg img_algs[] = {
.update = img_hash_update,
.final = img_hash_final,
.finup = img_hash_finup,
+ .export = img_hash_export,
+ .import = img_hash_import,
.digest = img_hash_digest,
.halg = {
.digestsize = MD5_DIGEST_SIZE,
+ .statesize = sizeof(struct md5_state),
.base = {
.cra_name = "md5",
.cra_driver_name = "img-md5",
@@ -723,7 +775,7 @@ static struct ahash_alg img_algs[] = {
CRYPTO_ALG_NEED_FALLBACK,
.cra_blocksize = MD5_HMAC_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct img_hash_ctx),
- .cra_init = img_hash_cra_init,
+ .cra_init = img_hash_cra_md5_init,
.cra_exit = img_hash_cra_exit,
.cra_module = THIS_MODULE,
}
@@ -734,9 +786,12 @@ static struct ahash_alg img_algs[] = {
.update = img_hash_update,
.final = img_hash_final,
.finup = img_hash_finup,
+ .export = img_hash_export,
+ .import = img_hash_import,
.digest = img_hash_digest,
.halg = {
.digestsize = SHA1_DIGEST_SIZE,
+ .statesize = sizeof(struct sha1_state),
.base = {
.cra_name = "sha1",
.cra_driver_name = "img-sha1",
@@ -746,7 +801,7 @@ static struct ahash_alg img_algs[] = {
CRYPTO_ALG_NEED_FALLBACK,
.cra_blocksize = SHA1_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct img_hash_ctx),
- .cra_init = img_hash_cra_init,
+ .cra_init = img_hash_cra_sha1_init,
.cra_exit = img_hash_cra_exit,
.cra_module = THIS_MODULE,
}
@@ -757,9 +812,12 @@ static struct ahash_alg img_algs[] = {
.update = img_hash_update,
.final = img_hash_final,
.finup = img_hash_finup,
+ .export = img_hash_export,
+ .import = img_hash_import,
.digest = img_hash_digest,
.halg = {
.digestsize = SHA224_DIGEST_SIZE,
+ .statesize = sizeof(struct sha256_state),
.base = {
.cra_name = "sha224",
.cra_driver_name = "img-sha224",
@@ -769,7 +827,7 @@ static struct ahash_alg img_algs[] = {
CRYPTO_ALG_NEED_FALLBACK,
.cra_blocksize = SHA224_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct img_hash_ctx),
- .cra_init = img_hash_cra_init,
+ .cra_init = img_hash_cra_sha224_init,
.cra_exit = img_hash_cra_exit,
.cra_module = THIS_MODULE,
}
@@ -780,9 +838,12 @@ static struct ahash_alg img_algs[] = {
.update = img_hash_update,
.final = img_hash_final,
.finup = img_hash_finup,
+ .export = img_hash_export,
+ .import = img_hash_import,
.digest = img_hash_digest,
.halg = {
.digestsize = SHA256_DIGEST_SIZE,
+ .statesize = sizeof(struct sha256_state),
.base = {
.cra_name = "sha256",
.cra_driver_name = "img-sha256",
@@ -792,7 +853,7 @@ static struct ahash_alg img_algs[] = {
CRYPTO_ALG_NEED_FALLBACK,
.cra_blocksize = SHA256_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct img_hash_ctx),
- .cra_init = img_hash_cra_init,
+ .cra_init = img_hash_cra_sha256_init,
.cra_exit = img_hash_cra_exit,
.cra_module = THIS_MODULE,
}
@@ -971,7 +1032,7 @@ static int img_hash_probe(struct platform_device *pdev)
err = img_register_algs(hdev);
if (err)
goto err_algs;
- dev_dbg(dev, "Img MD5/SHA1/SHA224/SHA256 Hardware accelerator initialized\n");
+ dev_info(dev, "Img MD5/SHA1/SHA224/SHA256 Hardware accelerator initialized\n");
return 0;
@@ -1013,11 +1074,38 @@ static int img_hash_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int img_hash_suspend(struct device *dev)
+{
+ struct img_hash_dev *hdev = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(hdev->hash_clk);
+ clk_disable_unprepare(hdev->sys_clk);
+
+ return 0;
+}
+
+static int img_hash_resume(struct device *dev)
+{
+ struct img_hash_dev *hdev = dev_get_drvdata(dev);
+
+ clk_prepare_enable(hdev->hash_clk);
+ clk_prepare_enable(hdev->sys_clk);
+
+ return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static const struct dev_pm_ops img_hash_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(img_hash_suspend, img_hash_resume)
+};
+
static struct platform_driver img_hash_driver = {
.probe = img_hash_probe,
.remove = img_hash_remove,
.driver = {
.name = "img-hash-accelerator",
+ .pm = &img_hash_pm_ops,
.of_match_table = of_match_ptr(img_hash_match),
}
};
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.