crypto: rockchip - introduce PM
Add runtime PM support for rockchip crypto. Reviewed-by: John Keeping <john@metanate.com> Signed-off-by: Corentin Labbe <clabbe@baylibre.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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@ -65,6 +65,48 @@ static void rk_crypto_disable_clk(struct rk_crypto_info *dev)
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clk_disable_unprepare(dev->sclk);
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}
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/*
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* Power management strategy: The device is suspended unless a TFM exists for
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* one of the algorithms proposed by this driver.
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*/
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static int rk_crypto_pm_suspend(struct device *dev)
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{
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struct rk_crypto_info *rkdev = dev_get_drvdata(dev);
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rk_crypto_disable_clk(rkdev);
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return 0;
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}
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static int rk_crypto_pm_resume(struct device *dev)
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{
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struct rk_crypto_info *rkdev = dev_get_drvdata(dev);
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return rk_crypto_enable_clk(rkdev);
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}
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static const struct dev_pm_ops rk_crypto_pm_ops = {
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SET_RUNTIME_PM_OPS(rk_crypto_pm_suspend, rk_crypto_pm_resume, NULL)
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};
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static int rk_crypto_pm_init(struct rk_crypto_info *rkdev)
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{
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int err;
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pm_runtime_use_autosuspend(rkdev->dev);
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pm_runtime_set_autosuspend_delay(rkdev->dev, 2000);
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err = pm_runtime_set_suspended(rkdev->dev);
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if (err)
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return err;
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pm_runtime_enable(rkdev->dev);
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return err;
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}
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static void rk_crypto_pm_exit(struct rk_crypto_info *rkdev)
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{
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pm_runtime_disable(rkdev->dev);
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}
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static irqreturn_t rk_crypto_irq_handle(int irq, void *dev_id)
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{
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struct rk_crypto_info *dev = platform_get_drvdata(dev_id);
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@ -273,7 +315,9 @@ static int rk_crypto_probe(struct platform_device *pdev)
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crypto_engine_start(crypto_info->engine);
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init_completion(&crypto_info->complete);
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rk_crypto_enable_clk(crypto_info);
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err = rk_crypto_pm_init(crypto_info);
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if (err)
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goto err_pm;
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err = rk_crypto_register(crypto_info);
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if (err) {
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@ -294,6 +338,8 @@ static int rk_crypto_probe(struct platform_device *pdev)
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return 0;
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err_register_alg:
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rk_crypto_pm_exit(crypto_info);
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err_pm:
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crypto_engine_exit(crypto_info->engine);
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err_crypto:
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dev_err(dev, "Crypto Accelerator not successfully registered\n");
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@ -308,7 +354,7 @@ static int rk_crypto_remove(struct platform_device *pdev)
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debugfs_remove_recursive(crypto_tmp->dbgfs_dir);
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#endif
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rk_crypto_unregister();
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rk_crypto_disable_clk(crypto_tmp);
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rk_crypto_pm_exit(crypto_tmp);
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crypto_engine_exit(crypto_tmp->engine);
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return 0;
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}
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@ -318,6 +364,7 @@ static struct platform_driver crypto_driver = {
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.remove = rk_crypto_remove,
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.driver = {
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.name = "rk3288-crypto",
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.pm = &rk_crypto_pm_ops,
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.of_match_table = crypto_of_id_table,
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},
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};
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@ -9,6 +9,7 @@
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#include <linux/interrupt.h>
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#include <linux/debugfs.h>
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#include <linux/delay.h>
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#include <linux/pm_runtime.h>
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#include <linux/scatterlist.h>
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#include <crypto/engine.h>
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#include <crypto/internal/hash.h>
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@ -328,6 +328,7 @@ static int rk_cra_hash_init(struct crypto_tfm *tfm)
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struct ahash_alg *alg = __crypto_ahash_alg(tfm->__crt_alg);
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const char *alg_name = crypto_tfm_alg_name(tfm);
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int err;
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algt = container_of(alg, struct rk_crypto_tmp, alg.hash);
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@ -349,7 +350,15 @@ static int rk_cra_hash_init(struct crypto_tfm *tfm)
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tctx->enginectx.op.prepare_request = rk_hash_prepare;
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tctx->enginectx.op.unprepare_request = rk_hash_unprepare;
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err = pm_runtime_resume_and_get(tctx->dev->dev);
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if (err < 0)
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goto error_pm;
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return 0;
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error_pm:
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crypto_free_ahash(tctx->fallback_tfm);
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return err;
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}
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static void rk_cra_hash_exit(struct crypto_tfm *tfm)
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@ -357,6 +366,7 @@ static void rk_cra_hash_exit(struct crypto_tfm *tfm)
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struct rk_ahash_ctx *tctx = crypto_tfm_ctx(tfm);
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crypto_free_ahash(tctx->fallback_tfm);
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pm_runtime_put_autosuspend(tctx->dev->dev);
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}
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struct rk_crypto_tmp rk_ahash_sha1 = {
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@ -454,6 +454,7 @@ static int rk_ablk_init_tfm(struct crypto_skcipher *tfm)
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struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
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const char *name = crypto_tfm_alg_name(&tfm->base);
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struct rk_crypto_tmp *algt;
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int err;
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algt = container_of(alg, struct rk_crypto_tmp, alg.skcipher);
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@ -471,7 +472,14 @@ static int rk_ablk_init_tfm(struct crypto_skcipher *tfm)
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ctx->enginectx.op.do_one_request = rk_cipher_run;
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err = pm_runtime_resume_and_get(ctx->dev->dev);
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if (err < 0)
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goto error_pm;
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return 0;
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error_pm:
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crypto_free_skcipher(ctx->fallback_tfm);
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return err;
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}
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static void rk_ablk_exit_tfm(struct crypto_skcipher *tfm)
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@ -480,6 +488,7 @@ static void rk_ablk_exit_tfm(struct crypto_skcipher *tfm)
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memzero_explicit(ctx->key, ctx->keylen);
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crypto_free_skcipher(ctx->fallback_tfm);
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pm_runtime_put_autosuspend(ctx->dev->dev);
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}
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struct rk_crypto_tmp rk_ecb_aes_alg = {
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