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path: root/drivers/crypto/stm32/stm32-hash.c
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Diffstat (limited to 'drivers/crypto/stm32/stm32-hash.c')
-rw-r--r--drivers/crypto/stm32/stm32-hash.c95
1 files changed, 79 insertions, 16 deletions
diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c
index cdc96f1bb917..590d7352837e 100644
--- a/drivers/crypto/stm32/stm32-hash.c
+++ b/drivers/crypto/stm32/stm32-hash.c
@@ -31,6 +31,7 @@
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <crypto/engine.h>
@@ -121,6 +122,8 @@ enum stm32_hash_data_format {
#define HASH_QUEUE_LENGTH 16
#define HASH_DMA_THRESHOLD 50
+#define HASH_AUTOSUSPEND_DELAY 50
+
struct stm32_hash_ctx {
struct crypto_engine_ctx enginectx;
struct stm32_hash_dev *hdev;
@@ -814,12 +817,17 @@ static void stm32_hash_finish_req(struct ahash_request *req, int err)
rctx->flags |= HASH_FLAGS_ERRORS;
}
+ pm_runtime_mark_last_busy(hdev->dev);
+ pm_runtime_put_autosuspend(hdev->dev);
+
crypto_finalize_hash_request(hdev->engine, req, err);
}
static int stm32_hash_hw_init(struct stm32_hash_dev *hdev,
struct stm32_hash_request_ctx *rctx)
{
+ pm_runtime_get_sync(hdev->dev);
+
if (!(HASH_FLAGS_INIT & hdev->flags)) {
stm32_hash_write(hdev, HASH_CR, HASH_CR_INIT);
stm32_hash_write(hdev, HASH_STR, 0);
@@ -967,6 +975,8 @@ static int stm32_hash_export(struct ahash_request *req, void *out)
u32 *preg;
unsigned int i;
+ pm_runtime_get_sync(hdev->dev);
+
while (!(stm32_hash_read(hdev, HASH_SR) & HASH_SR_DATA_INPUT_READY))
cpu_relax();
@@ -982,6 +992,9 @@ static int stm32_hash_export(struct ahash_request *req, void *out)
for (i = 0; i < HASH_CSR_REGISTER_NUMBER; i++)
*preg++ = stm32_hash_read(hdev, HASH_CSR(i));
+ pm_runtime_mark_last_busy(hdev->dev);
+ pm_runtime_put_autosuspend(hdev->dev);
+
memcpy(out, rctx, sizeof(*rctx));
return 0;
@@ -1000,6 +1013,8 @@ static int stm32_hash_import(struct ahash_request *req, const void *in)
preg = rctx->hw_context;
+ pm_runtime_get_sync(hdev->dev);
+
stm32_hash_write(hdev, HASH_IMR, *preg++);
stm32_hash_write(hdev, HASH_STR, *preg++);
stm32_hash_write(hdev, HASH_CR, *preg);
@@ -1009,6 +1024,9 @@ static int stm32_hash_import(struct ahash_request *req, const void *in)
for (i = 0; i < HASH_CSR_REGISTER_NUMBER; i++)
stm32_hash_write(hdev, HASH_CSR(i), *preg++);
+ pm_runtime_mark_last_busy(hdev->dev);
+ pm_runtime_put_autosuspend(hdev->dev);
+
kfree(rctx->hw_context);
return 0;
@@ -1132,8 +1150,7 @@ static struct ahash_alg algs_md5_sha1[] = {
.cra_name = "md5",
.cra_driver_name = "stm32-md5",
.cra_priority = 200,
- .cra_flags = CRYPTO_ALG_TYPE_AHASH |
- CRYPTO_ALG_ASYNC |
+ .cra_flags = CRYPTO_ALG_ASYNC |
CRYPTO_ALG_KERN_DRIVER_ONLY,
.cra_blocksize = MD5_HMAC_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct stm32_hash_ctx),
@@ -1159,8 +1176,7 @@ static struct ahash_alg algs_md5_sha1[] = {
.cra_name = "hmac(md5)",
.cra_driver_name = "stm32-hmac-md5",
.cra_priority = 200,
- .cra_flags = CRYPTO_ALG_TYPE_AHASH |
- CRYPTO_ALG_ASYNC |
+ .cra_flags = CRYPTO_ALG_ASYNC |
CRYPTO_ALG_KERN_DRIVER_ONLY,
.cra_blocksize = MD5_HMAC_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct stm32_hash_ctx),
@@ -1185,8 +1201,7 @@ static struct ahash_alg algs_md5_sha1[] = {
.cra_name = "sha1",
.cra_driver_name = "stm32-sha1",
.cra_priority = 200,
- .cra_flags = CRYPTO_ALG_TYPE_AHASH |
- CRYPTO_ALG_ASYNC |
+ .cra_flags = CRYPTO_ALG_ASYNC |
CRYPTO_ALG_KERN_DRIVER_ONLY,
.cra_blocksize = SHA1_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct stm32_hash_ctx),
@@ -1212,8 +1227,7 @@ static struct ahash_alg algs_md5_sha1[] = {
.cra_name = "hmac(sha1)",
.cra_driver_name = "stm32-hmac-sha1",
.cra_priority = 200,
- .cra_flags = CRYPTO_ALG_TYPE_AHASH |
- CRYPTO_ALG_ASYNC |
+ .cra_flags = CRYPTO_ALG_ASYNC |
CRYPTO_ALG_KERN_DRIVER_ONLY,
.cra_blocksize = SHA1_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct stm32_hash_ctx),
@@ -1241,8 +1255,7 @@ static struct ahash_alg algs_sha224_sha256[] = {
.cra_name = "sha224",
.cra_driver_name = "stm32-sha224",
.cra_priority = 200,
- .cra_flags = CRYPTO_ALG_TYPE_AHASH |
- CRYPTO_ALG_ASYNC |
+ .cra_flags = CRYPTO_ALG_ASYNC |
CRYPTO_ALG_KERN_DRIVER_ONLY,
.cra_blocksize = SHA224_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct stm32_hash_ctx),
@@ -1268,8 +1281,7 @@ static struct ahash_alg algs_sha224_sha256[] = {
.cra_name = "hmac(sha224)",
.cra_driver_name = "stm32-hmac-sha224",
.cra_priority = 200,
- .cra_flags = CRYPTO_ALG_TYPE_AHASH |
- CRYPTO_ALG_ASYNC |
+ .cra_flags = CRYPTO_ALG_ASYNC |
CRYPTO_ALG_KERN_DRIVER_ONLY,
.cra_blocksize = SHA224_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct stm32_hash_ctx),
@@ -1294,8 +1306,7 @@ static struct ahash_alg algs_sha224_sha256[] = {
.cra_name = "sha256",
.cra_driver_name = "stm32-sha256",
.cra_priority = 200,
- .cra_flags = CRYPTO_ALG_TYPE_AHASH |
- CRYPTO_ALG_ASYNC |
+ .cra_flags = CRYPTO_ALG_ASYNC |
CRYPTO_ALG_KERN_DRIVER_ONLY,
.cra_blocksize = SHA256_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct stm32_hash_ctx),
@@ -1321,8 +1332,7 @@ static struct ahash_alg algs_sha224_sha256[] = {
.cra_name = "hmac(sha256)",
.cra_driver_name = "stm32-hmac-sha256",
.cra_priority = 200,
- .cra_flags = CRYPTO_ALG_TYPE_AHASH |
- CRYPTO_ALG_ASYNC |
+ .cra_flags = CRYPTO_ALG_ASYNC |
CRYPTO_ALG_KERN_DRIVER_ONLY,
.cra_blocksize = SHA256_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct stm32_hash_ctx),
@@ -1482,6 +1492,13 @@ static int stm32_hash_probe(struct platform_device *pdev)
return ret;
}
+ pm_runtime_set_autosuspend_delay(dev, HASH_AUTOSUSPEND_DELAY);
+ pm_runtime_use_autosuspend(dev);
+
+ pm_runtime_get_noresume(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
hdev->rst = devm_reset_control_get(&pdev->dev, NULL);
if (!IS_ERR(hdev->rst)) {
reset_control_assert(hdev->rst);
@@ -1522,6 +1539,8 @@ static int stm32_hash_probe(struct platform_device *pdev)
dev_info(dev, "Init HASH done HW ver %x DMA mode %u\n",
stm32_hash_read(hdev, HASH_VER), hdev->dma_mode);
+ pm_runtime_put_sync(dev);
+
return 0;
err_algs:
@@ -1535,6 +1554,9 @@ err_engine:
if (hdev->dma_lch)
dma_release_channel(hdev->dma_lch);
+ pm_runtime_disable(dev);
+ pm_runtime_put_noidle(dev);
+
clk_disable_unprepare(hdev->clk);
return ret;
@@ -1543,11 +1565,16 @@ err_engine:
static int stm32_hash_remove(struct platform_device *pdev)
{
static struct stm32_hash_dev *hdev;
+ int ret;
hdev = platform_get_drvdata(pdev);
if (!hdev)
return -ENODEV;
+ ret = pm_runtime_get_sync(hdev->dev);
+ if (ret < 0)
+ return ret;
+
stm32_hash_unregister_algs(hdev);
crypto_engine_exit(hdev->engine);
@@ -1559,16 +1586,52 @@ static int stm32_hash_remove(struct platform_device *pdev)
if (hdev->dma_lch)
dma_release_channel(hdev->dma_lch);
+ pm_runtime_disable(hdev->dev);
+ pm_runtime_put_noidle(hdev->dev);
+
clk_disable_unprepare(hdev->clk);
return 0;
}
+#ifdef CONFIG_PM
+static int stm32_hash_runtime_suspend(struct device *dev)
+{
+ struct stm32_hash_dev *hdev = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(hdev->clk);
+
+ return 0;
+}
+
+static int stm32_hash_runtime_resume(struct device *dev)
+{
+ struct stm32_hash_dev *hdev = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(hdev->clk);
+ if (ret) {
+ dev_err(hdev->dev, "Failed to prepare_enable clock\n");
+ return ret;
+ }
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops stm32_hash_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(stm32_hash_runtime_suspend,
+ stm32_hash_runtime_resume, NULL)
+};
+
static struct platform_driver stm32_hash_driver = {
.probe = stm32_hash_probe,
.remove = stm32_hash_remove,
.driver = {
.name = "stm32-hash",
+ .pm = &stm32_hash_pm_ops,
.of_match_table = stm32_hash_of_match,
}
};
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.