* [PATCH v3 0/2] crypto: sun4i-ss: Enable power management @ 2019-09-24 8:08 ` Corentin Labbe 0 siblings, 0 replies; 10+ messages in thread From: Corentin Labbe @ 2019-09-24 8:08 UTC (permalink / raw) To: davem, herbert, mripard, wens Cc: linux-arm-kernel, linux-crypto, linux-kernel, linux-sunxi, Corentin Labbe Hello This serie enables power management in the sun4i-ss driver. Regards Changes since v2 ( https://lore.kernel.org/linux-arm-kernel/20190919051035.4111-2-clabbe.montjoie@gmail.com/T/ ): - depends on PM - fusioned suspend/resume functions with sun4i_ssenable/disable - fixed style problem Changes since v1: - Fixed style in patch #1 - Check more return code of PM functions - Add PM support in hash/prng - reworked the probe order of PM functions and the PM strategy Corentin Labbe (2): crypto: sun4i-ss: simplify enable/disable of the device crypto: sun4i-ss: enable pm_runtime drivers/crypto/Kconfig | 1 + drivers/crypto/sunxi-ss/sun4i-ss-cipher.c | 10 ++ drivers/crypto/sunxi-ss/sun4i-ss-core.c | 139 ++++++++++++++++------ drivers/crypto/sunxi-ss/sun4i-ss-hash.c | 12 ++ drivers/crypto/sunxi-ss/sun4i-ss-prng.c | 9 +- drivers/crypto/sunxi-ss/sun4i-ss.h | 2 + 6 files changed, 133 insertions(+), 40 deletions(-) -- 2.21.0 ^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH v3 0/2] crypto: sun4i-ss: Enable power management @ 2019-09-24 8:08 ` Corentin Labbe 0 siblings, 0 replies; 10+ messages in thread From: Corentin Labbe @ 2019-09-24 8:08 UTC (permalink / raw) To: davem, herbert, mripard, wens Cc: linux-sunxi, Corentin Labbe, linux-crypto, linux-arm-kernel, linux-kernel Hello This serie enables power management in the sun4i-ss driver. Regards Changes since v2 ( https://lore.kernel.org/linux-arm-kernel/20190919051035.4111-2-clabbe.montjoie@gmail.com/T/ ): - depends on PM - fusioned suspend/resume functions with sun4i_ssenable/disable - fixed style problem Changes since v1: - Fixed style in patch #1 - Check more return code of PM functions - Add PM support in hash/prng - reworked the probe order of PM functions and the PM strategy Corentin Labbe (2): crypto: sun4i-ss: simplify enable/disable of the device crypto: sun4i-ss: enable pm_runtime drivers/crypto/Kconfig | 1 + drivers/crypto/sunxi-ss/sun4i-ss-cipher.c | 10 ++ drivers/crypto/sunxi-ss/sun4i-ss-core.c | 139 ++++++++++++++++------ drivers/crypto/sunxi-ss/sun4i-ss-hash.c | 12 ++ drivers/crypto/sunxi-ss/sun4i-ss-prng.c | 9 +- drivers/crypto/sunxi-ss/sun4i-ss.h | 2 + 6 files changed, 133 insertions(+), 40 deletions(-) -- 2.21.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH v3 1/2] crypto: sun4i-ss: simplify enable/disable of the device 2019-09-24 8:08 ` Corentin Labbe @ 2019-09-24 8:08 ` Corentin Labbe -1 siblings, 0 replies; 10+ messages in thread From: Corentin Labbe @ 2019-09-24 8:08 UTC (permalink / raw) To: davem, herbert, mripard, wens Cc: linux-arm-kernel, linux-crypto, linux-kernel, linux-sunxi, Corentin Labbe This patch regroups resource enabling/disabling in dedicated function. This simplify error handling and will permit to support power management. Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com> Acked-by: Maxime Ripard <mripard@kernel.org> --- drivers/crypto/sunxi-ss/sun4i-ss-core.c | 77 +++++++++++++++---------- 1 file changed, 46 insertions(+), 31 deletions(-) diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-core.c b/drivers/crypto/sunxi-ss/sun4i-ss-core.c index 9aa6fe081a27..6c2db5d83b06 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-core.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-core.c @@ -223,6 +223,45 @@ static struct sun4i_ss_alg_template ss_algs[] = { #endif }; +static void sun4i_ss_disable(struct sun4i_ss_ctx *ss) +{ + if (ss->reset) + reset_control_assert(ss->reset); + + clk_disable_unprepare(ss->ssclk); + clk_disable_unprepare(ss->busclk); +} + +static int sun4i_ss_enable(struct sun4i_ss_ctx *ss) +{ + int err; + + err = clk_prepare_enable(ss->busclk); + if (err) { + dev_err(ss->dev, "Cannot prepare_enable busclk\n"); + goto err_enable; + } + + err = clk_prepare_enable(ss->ssclk); + if (err) { + dev_err(ss->dev, "Cannot prepare_enable ssclk\n"); + goto err_enable; + } + + if (ss->reset) { + err = reset_control_deassert(ss->reset); + if (err) { + dev_err(ss->dev, "Cannot deassert reset control\n"); + goto err_enable; + } + } + + return err; +err_enable: + sun4i_ss_disable(ss); + return err; +} + static int sun4i_ss_probe(struct platform_device *pdev) { u32 v; @@ -269,17 +308,9 @@ static int sun4i_ss_probe(struct platform_device *pdev) ss->reset = NULL; } - /* Enable both clocks */ - err = clk_prepare_enable(ss->busclk); - if (err) { - dev_err(&pdev->dev, "Cannot prepare_enable busclk\n"); - return err; - } - err = clk_prepare_enable(ss->ssclk); - if (err) { - dev_err(&pdev->dev, "Cannot prepare_enable ssclk\n"); - goto error_ssclk; - } + err = sun4i_ss_enable(ss); + if (err) + goto error_enable; /* * Check that clock have the correct rates given in the datasheet @@ -288,16 +319,7 @@ static int sun4i_ss_probe(struct platform_device *pdev) err = clk_set_rate(ss->ssclk, cr_mod); if (err) { dev_err(&pdev->dev, "Cannot set clock rate to ssclk\n"); - goto error_clk; - } - - /* Deassert reset if we have a reset control */ - if (ss->reset) { - err = reset_control_deassert(ss->reset); - if (err) { - dev_err(&pdev->dev, "Cannot deassert reset control\n"); - goto error_clk; - } + goto error_enable; } /* @@ -387,12 +409,8 @@ static int sun4i_ss_probe(struct platform_device *pdev) break; } } - if (ss->reset) - reset_control_assert(ss->reset); -error_clk: - clk_disable_unprepare(ss->ssclk); -error_ssclk: - clk_disable_unprepare(ss->busclk); +error_enable: + sun4i_ss_disable(ss); return err; } @@ -416,10 +434,7 @@ static int sun4i_ss_remove(struct platform_device *pdev) } writel(0, ss->base + SS_CTL); - if (ss->reset) - reset_control_assert(ss->reset); - clk_disable_unprepare(ss->busclk); - clk_disable_unprepare(ss->ssclk); + sun4i_ss_disable(ss); return 0; } -- 2.21.0 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v3 1/2] crypto: sun4i-ss: simplify enable/disable of the device @ 2019-09-24 8:08 ` Corentin Labbe 0 siblings, 0 replies; 10+ messages in thread From: Corentin Labbe @ 2019-09-24 8:08 UTC (permalink / raw) To: davem, herbert, mripard, wens Cc: linux-sunxi, Corentin Labbe, linux-crypto, linux-arm-kernel, linux-kernel This patch regroups resource enabling/disabling in dedicated function. This simplify error handling and will permit to support power management. Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com> Acked-by: Maxime Ripard <mripard@kernel.org> --- drivers/crypto/sunxi-ss/sun4i-ss-core.c | 77 +++++++++++++++---------- 1 file changed, 46 insertions(+), 31 deletions(-) diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-core.c b/drivers/crypto/sunxi-ss/sun4i-ss-core.c index 9aa6fe081a27..6c2db5d83b06 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-core.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-core.c @@ -223,6 +223,45 @@ static struct sun4i_ss_alg_template ss_algs[] = { #endif }; +static void sun4i_ss_disable(struct sun4i_ss_ctx *ss) +{ + if (ss->reset) + reset_control_assert(ss->reset); + + clk_disable_unprepare(ss->ssclk); + clk_disable_unprepare(ss->busclk); +} + +static int sun4i_ss_enable(struct sun4i_ss_ctx *ss) +{ + int err; + + err = clk_prepare_enable(ss->busclk); + if (err) { + dev_err(ss->dev, "Cannot prepare_enable busclk\n"); + goto err_enable; + } + + err = clk_prepare_enable(ss->ssclk); + if (err) { + dev_err(ss->dev, "Cannot prepare_enable ssclk\n"); + goto err_enable; + } + + if (ss->reset) { + err = reset_control_deassert(ss->reset); + if (err) { + dev_err(ss->dev, "Cannot deassert reset control\n"); + goto err_enable; + } + } + + return err; +err_enable: + sun4i_ss_disable(ss); + return err; +} + static int sun4i_ss_probe(struct platform_device *pdev) { u32 v; @@ -269,17 +308,9 @@ static int sun4i_ss_probe(struct platform_device *pdev) ss->reset = NULL; } - /* Enable both clocks */ - err = clk_prepare_enable(ss->busclk); - if (err) { - dev_err(&pdev->dev, "Cannot prepare_enable busclk\n"); - return err; - } - err = clk_prepare_enable(ss->ssclk); - if (err) { - dev_err(&pdev->dev, "Cannot prepare_enable ssclk\n"); - goto error_ssclk; - } + err = sun4i_ss_enable(ss); + if (err) + goto error_enable; /* * Check that clock have the correct rates given in the datasheet @@ -288,16 +319,7 @@ static int sun4i_ss_probe(struct platform_device *pdev) err = clk_set_rate(ss->ssclk, cr_mod); if (err) { dev_err(&pdev->dev, "Cannot set clock rate to ssclk\n"); - goto error_clk; - } - - /* Deassert reset if we have a reset control */ - if (ss->reset) { - err = reset_control_deassert(ss->reset); - if (err) { - dev_err(&pdev->dev, "Cannot deassert reset control\n"); - goto error_clk; - } + goto error_enable; } /* @@ -387,12 +409,8 @@ static int sun4i_ss_probe(struct platform_device *pdev) break; } } - if (ss->reset) - reset_control_assert(ss->reset); -error_clk: - clk_disable_unprepare(ss->ssclk); -error_ssclk: - clk_disable_unprepare(ss->busclk); +error_enable: + sun4i_ss_disable(ss); return err; } @@ -416,10 +434,7 @@ static int sun4i_ss_remove(struct platform_device *pdev) } writel(0, ss->base + SS_CTL); - if (ss->reset) - reset_control_assert(ss->reset); - clk_disable_unprepare(ss->busclk); - clk_disable_unprepare(ss->ssclk); + sun4i_ss_disable(ss); return 0; } -- 2.21.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v3 2/2] crypto: sun4i-ss: enable pm_runtime 2019-09-24 8:08 ` Corentin Labbe @ 2019-09-24 8:08 ` Corentin Labbe -1 siblings, 0 replies; 10+ messages in thread From: Corentin Labbe @ 2019-09-24 8:08 UTC (permalink / raw) To: davem, herbert, mripard, wens Cc: linux-arm-kernel, linux-crypto, linux-kernel, linux-sunxi, Corentin Labbe This patch enables power management on the Security System. sun4i-ss now depends on PM because it simplify code and prevent some ifdef. But this is not a problem since arch maintainer want ARCH_SUNXI to depend on PM in the future. Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com> --- drivers/crypto/Kconfig | 1 + drivers/crypto/sunxi-ss/sun4i-ss-cipher.c | 10 +++ drivers/crypto/sunxi-ss/sun4i-ss-core.c | 82 ++++++++++++++++++----- drivers/crypto/sunxi-ss/sun4i-ss-hash.c | 12 ++++ drivers/crypto/sunxi-ss/sun4i-ss-prng.c | 9 ++- drivers/crypto/sunxi-ss/sun4i-ss.h | 2 + 6 files changed, 97 insertions(+), 19 deletions(-) diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig index 980b0844918b..ee53660b532c 100644 --- a/drivers/crypto/Kconfig +++ b/drivers/crypto/Kconfig @@ -662,6 +662,7 @@ config CRYPTO_DEV_IMGTEC_HASH config CRYPTO_DEV_SUN4I_SS tristate "Support for Allwinner Security System cryptographic accelerator" depends on ARCH_SUNXI && !64BIT + depends on PM select CRYPTO_MD5 select CRYPTO_SHA1 select CRYPTO_AES diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c b/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c index fa4b1b47822e..93acec22e42f 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c @@ -480,6 +480,7 @@ int sun4i_ss_cipher_init(struct crypto_tfm *tfm) struct sun4i_tfm_ctx *op = crypto_tfm_ctx(tfm); struct sun4i_ss_alg_template *algt; const char *name = crypto_tfm_alg_name(tfm); + int err; memset(op, 0, sizeof(struct sun4i_tfm_ctx)); @@ -497,13 +498,22 @@ int sun4i_ss_cipher_init(struct crypto_tfm *tfm) return PTR_ERR(op->fallback_tfm); } + err = pm_runtime_get_sync(op->ss->dev); + if (err < 0) + goto error_pm; + return 0; +error_pm: + crypto_free_sync_skcipher(op->fallback_tfm); + return err; } void sun4i_ss_cipher_exit(struct crypto_tfm *tfm) { struct sun4i_tfm_ctx *op = crypto_tfm_ctx(tfm); + crypto_free_sync_skcipher(op->fallback_tfm); + pm_runtime_put(op->ss->dev); } /* check and set the AES key, prepare the mode to be used */ diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-core.c b/drivers/crypto/sunxi-ss/sun4i-ss-core.c index 6c2db5d83b06..814cd12149a9 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-core.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-core.c @@ -44,7 +44,8 @@ static struct sun4i_ss_alg_template ss_algs[] = { .cra_blocksize = MD5_HMAC_BLOCK_SIZE, .cra_ctxsize = sizeof(struct sun4i_req_ctx), .cra_module = THIS_MODULE, - .cra_init = sun4i_hash_crainit + .cra_init = sun4i_hash_crainit, + .cra_exit = sun4i_hash_craexit, } } } @@ -70,7 +71,8 @@ static struct sun4i_ss_alg_template ss_algs[] = { .cra_blocksize = SHA1_BLOCK_SIZE, .cra_ctxsize = sizeof(struct sun4i_req_ctx), .cra_module = THIS_MODULE, - .cra_init = sun4i_hash_crainit + .cra_init = sun4i_hash_crainit, + .cra_exit = sun4i_hash_craexit, } } } @@ -223,17 +225,26 @@ static struct sun4i_ss_alg_template ss_algs[] = { #endif }; -static void sun4i_ss_disable(struct sun4i_ss_ctx *ss) +/* + * Power management strategy: The device is suspended unless a TFM exists for + * one of the algorithms proposed by this driver. + */ +static int sun4i_ss_pm_suspend(struct device *dev) { + struct sun4i_ss_ctx *ss = dev_get_drvdata(dev); + if (ss->reset) reset_control_assert(ss->reset); clk_disable_unprepare(ss->ssclk); clk_disable_unprepare(ss->busclk); + return 0; } -static int sun4i_ss_enable(struct sun4i_ss_ctx *ss) +static int sun4i_ss_pm_resume(struct device *dev) { + struct sun4i_ss_ctx *ss = dev_get_drvdata(dev); + int err; err = clk_prepare_enable(ss->busclk); @@ -258,10 +269,38 @@ static int sun4i_ss_enable(struct sun4i_ss_ctx *ss) return err; err_enable: - sun4i_ss_disable(ss); + sun4i_ss_pm_suspend(dev); + return err; +} + +const struct dev_pm_ops sun4i_ss_pm_ops = { + SET_RUNTIME_PM_OPS(sun4i_ss_pm_suspend, sun4i_ss_pm_resume, NULL) +}; + +/* + * When power management is enabled, this function enables the PM and set the + * device as suspended + * When power management is disabled, this function just enables the device + */ +static int sun4i_ss_pm_init(struct sun4i_ss_ctx *ss) +{ + int err; + + pm_runtime_use_autosuspend(ss->dev); + pm_runtime_set_autosuspend_delay(ss->dev, 2000); + + err = pm_runtime_set_suspended(ss->dev); + if (err) + return err; + pm_runtime_enable(ss->dev); return err; } +static void sun4i_ss_pm_exit(struct sun4i_ss_ctx *ss) +{ + pm_runtime_disable(ss->dev); +} + static int sun4i_ss_probe(struct platform_device *pdev) { u32 v; @@ -308,10 +347,6 @@ static int sun4i_ss_probe(struct platform_device *pdev) ss->reset = NULL; } - err = sun4i_ss_enable(ss); - if (err) - goto error_enable; - /* * Check that clock have the correct rates given in the datasheet * Try to set the clock to the maximum allowed @@ -319,7 +354,7 @@ static int sun4i_ss_probe(struct platform_device *pdev) err = clk_set_rate(ss->ssclk, cr_mod); if (err) { dev_err(&pdev->dev, "Cannot set clock rate to ssclk\n"); - goto error_enable; + return err; } /* @@ -347,12 +382,26 @@ static int sun4i_ss_probe(struct platform_device *pdev) dev_warn(&pdev->dev, "Clock ss is at %lu (%lu MHz) (must be <= %lu)\n", cr, cr / 1000000, cr_mod); + ss->dev = &pdev->dev; + platform_set_drvdata(pdev, ss); + + spin_lock_init(&ss->slock); + + err = sun4i_ss_pm_init(ss); + if (err) + return err; + /* * Datasheet named it "Die Bonding ID" * I expect to be a sort of Security System Revision number. * Since the A80 seems to have an other version of SS * this info could be useful */ + + err = pm_runtime_get_sync(ss->dev); + if (err < 0) + goto error_pm; + writel(SS_ENABLED, ss->base + SS_CTL); v = readl(ss->base + SS_CTL); v >>= 16; @@ -360,9 +409,7 @@ static int sun4i_ss_probe(struct platform_device *pdev) dev_info(&pdev->dev, "Die ID %d\n", v); writel(0, ss->base + SS_CTL); - ss->dev = &pdev->dev; - - spin_lock_init(&ss->slock); + pm_runtime_put_sync(ss->dev); for (i = 0; i < ARRAY_SIZE(ss_algs); i++) { ss_algs[i].ss = ss; @@ -392,7 +439,6 @@ static int sun4i_ss_probe(struct platform_device *pdev) break; } } - platform_set_drvdata(pdev, ss); return 0; error_alg: i--; @@ -409,8 +455,8 @@ static int sun4i_ss_probe(struct platform_device *pdev) break; } } -error_enable: - sun4i_ss_disable(ss); +error_pm: + sun4i_ss_pm_exit(ss); return err; } @@ -433,8 +479,7 @@ static int sun4i_ss_remove(struct platform_device *pdev) } } - writel(0, ss->base + SS_CTL); - sun4i_ss_disable(ss); + sun4i_ss_pm_exit(ss); return 0; } @@ -449,6 +494,7 @@ static struct platform_driver sun4i_ss_driver = { .remove = sun4i_ss_remove, .driver = { .name = "sun4i-ss", + .pm = &sun4i_ss_pm_ops, .of_match_table = a20ss_crypto_of_match_table, }, }; diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-hash.c b/drivers/crypto/sunxi-ss/sun4i-ss-hash.c index fcffba5ef927..9930c9ce8971 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-hash.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-hash.c @@ -19,17 +19,29 @@ int sun4i_hash_crainit(struct crypto_tfm *tfm) struct sun4i_tfm_ctx *op = crypto_tfm_ctx(tfm); struct ahash_alg *alg = __crypto_ahash_alg(tfm->__crt_alg); struct sun4i_ss_alg_template *algt; + int err; memset(op, 0, sizeof(struct sun4i_tfm_ctx)); algt = container_of(alg, struct sun4i_ss_alg_template, alg.hash); op->ss = algt->ss; + err = pm_runtime_get_sync(op->ss->dev); + if (err < 0) + return err; + crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), sizeof(struct sun4i_req_ctx)); return 0; } +void sun4i_hash_craexit(struct crypto_tfm *tfm) +{ + struct sun4i_tfm_ctx *op = crypto_tfm_ctx(tfm); + + pm_runtime_put(op->ss->dev); +} + /* sun4i_hash_init: initialize request context */ int sun4i_hash_init(struct ahash_request *areq) { diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-prng.c b/drivers/crypto/sunxi-ss/sun4i-ss-prng.c index 63d636424161..729aafdbea84 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-prng.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-prng.c @@ -17,7 +17,7 @@ int sun4i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src, { struct sun4i_ss_alg_template *algt; struct rng_alg *alg = crypto_rng_alg(tfm); - int i; + int i, err; u32 v; u32 *data = (u32 *)dst; const u32 mode = SS_OP_PRNG | SS_PRNG_CONTINUE | SS_ENABLED; @@ -28,6 +28,10 @@ int sun4i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src, algt = container_of(alg, struct sun4i_ss_alg_template, alg.rng); ss = algt->ss; + err = pm_runtime_get_sync(ss->dev); + if (err < 0) + return err; + spin_lock_bh(&ss->slock); writel(mode, ss->base + SS_CTL); @@ -52,5 +56,8 @@ int sun4i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src, writel(0, ss->base + SS_CTL); spin_unlock_bh(&ss->slock); + + pm_runtime_put(ss->dev); + return 0; } diff --git a/drivers/crypto/sunxi-ss/sun4i-ss.h b/drivers/crypto/sunxi-ss/sun4i-ss.h index 35a27a7145f8..60425ac75d90 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss.h +++ b/drivers/crypto/sunxi-ss/sun4i-ss.h @@ -22,6 +22,7 @@ #include <linux/scatterlist.h> #include <linux/interrupt.h> #include <linux/delay.h> +#include <linux/pm_runtime.h> #include <crypto/md5.h> #include <crypto/skcipher.h> #include <crypto/sha.h> @@ -177,6 +178,7 @@ struct sun4i_req_ctx { }; int sun4i_hash_crainit(struct crypto_tfm *tfm); +void sun4i_hash_craexit(struct crypto_tfm *tfm); int sun4i_hash_init(struct ahash_request *areq); int sun4i_hash_update(struct ahash_request *areq); int sun4i_hash_final(struct ahash_request *areq); -- 2.21.0 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v3 2/2] crypto: sun4i-ss: enable pm_runtime @ 2019-09-24 8:08 ` Corentin Labbe 0 siblings, 0 replies; 10+ messages in thread From: Corentin Labbe @ 2019-09-24 8:08 UTC (permalink / raw) To: davem, herbert, mripard, wens Cc: linux-sunxi, Corentin Labbe, linux-crypto, linux-arm-kernel, linux-kernel This patch enables power management on the Security System. sun4i-ss now depends on PM because it simplify code and prevent some ifdef. But this is not a problem since arch maintainer want ARCH_SUNXI to depend on PM in the future. Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com> --- drivers/crypto/Kconfig | 1 + drivers/crypto/sunxi-ss/sun4i-ss-cipher.c | 10 +++ drivers/crypto/sunxi-ss/sun4i-ss-core.c | 82 ++++++++++++++++++----- drivers/crypto/sunxi-ss/sun4i-ss-hash.c | 12 ++++ drivers/crypto/sunxi-ss/sun4i-ss-prng.c | 9 ++- drivers/crypto/sunxi-ss/sun4i-ss.h | 2 + 6 files changed, 97 insertions(+), 19 deletions(-) diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig index 980b0844918b..ee53660b532c 100644 --- a/drivers/crypto/Kconfig +++ b/drivers/crypto/Kconfig @@ -662,6 +662,7 @@ config CRYPTO_DEV_IMGTEC_HASH config CRYPTO_DEV_SUN4I_SS tristate "Support for Allwinner Security System cryptographic accelerator" depends on ARCH_SUNXI && !64BIT + depends on PM select CRYPTO_MD5 select CRYPTO_SHA1 select CRYPTO_AES diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c b/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c index fa4b1b47822e..93acec22e42f 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c @@ -480,6 +480,7 @@ int sun4i_ss_cipher_init(struct crypto_tfm *tfm) struct sun4i_tfm_ctx *op = crypto_tfm_ctx(tfm); struct sun4i_ss_alg_template *algt; const char *name = crypto_tfm_alg_name(tfm); + int err; memset(op, 0, sizeof(struct sun4i_tfm_ctx)); @@ -497,13 +498,22 @@ int sun4i_ss_cipher_init(struct crypto_tfm *tfm) return PTR_ERR(op->fallback_tfm); } + err = pm_runtime_get_sync(op->ss->dev); + if (err < 0) + goto error_pm; + return 0; +error_pm: + crypto_free_sync_skcipher(op->fallback_tfm); + return err; } void sun4i_ss_cipher_exit(struct crypto_tfm *tfm) { struct sun4i_tfm_ctx *op = crypto_tfm_ctx(tfm); + crypto_free_sync_skcipher(op->fallback_tfm); + pm_runtime_put(op->ss->dev); } /* check and set the AES key, prepare the mode to be used */ diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-core.c b/drivers/crypto/sunxi-ss/sun4i-ss-core.c index 6c2db5d83b06..814cd12149a9 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-core.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-core.c @@ -44,7 +44,8 @@ static struct sun4i_ss_alg_template ss_algs[] = { .cra_blocksize = MD5_HMAC_BLOCK_SIZE, .cra_ctxsize = sizeof(struct sun4i_req_ctx), .cra_module = THIS_MODULE, - .cra_init = sun4i_hash_crainit + .cra_init = sun4i_hash_crainit, + .cra_exit = sun4i_hash_craexit, } } } @@ -70,7 +71,8 @@ static struct sun4i_ss_alg_template ss_algs[] = { .cra_blocksize = SHA1_BLOCK_SIZE, .cra_ctxsize = sizeof(struct sun4i_req_ctx), .cra_module = THIS_MODULE, - .cra_init = sun4i_hash_crainit + .cra_init = sun4i_hash_crainit, + .cra_exit = sun4i_hash_craexit, } } } @@ -223,17 +225,26 @@ static struct sun4i_ss_alg_template ss_algs[] = { #endif }; -static void sun4i_ss_disable(struct sun4i_ss_ctx *ss) +/* + * Power management strategy: The device is suspended unless a TFM exists for + * one of the algorithms proposed by this driver. + */ +static int sun4i_ss_pm_suspend(struct device *dev) { + struct sun4i_ss_ctx *ss = dev_get_drvdata(dev); + if (ss->reset) reset_control_assert(ss->reset); clk_disable_unprepare(ss->ssclk); clk_disable_unprepare(ss->busclk); + return 0; } -static int sun4i_ss_enable(struct sun4i_ss_ctx *ss) +static int sun4i_ss_pm_resume(struct device *dev) { + struct sun4i_ss_ctx *ss = dev_get_drvdata(dev); + int err; err = clk_prepare_enable(ss->busclk); @@ -258,10 +269,38 @@ static int sun4i_ss_enable(struct sun4i_ss_ctx *ss) return err; err_enable: - sun4i_ss_disable(ss); + sun4i_ss_pm_suspend(dev); + return err; +} + +const struct dev_pm_ops sun4i_ss_pm_ops = { + SET_RUNTIME_PM_OPS(sun4i_ss_pm_suspend, sun4i_ss_pm_resume, NULL) +}; + +/* + * When power management is enabled, this function enables the PM and set the + * device as suspended + * When power management is disabled, this function just enables the device + */ +static int sun4i_ss_pm_init(struct sun4i_ss_ctx *ss) +{ + int err; + + pm_runtime_use_autosuspend(ss->dev); + pm_runtime_set_autosuspend_delay(ss->dev, 2000); + + err = pm_runtime_set_suspended(ss->dev); + if (err) + return err; + pm_runtime_enable(ss->dev); return err; } +static void sun4i_ss_pm_exit(struct sun4i_ss_ctx *ss) +{ + pm_runtime_disable(ss->dev); +} + static int sun4i_ss_probe(struct platform_device *pdev) { u32 v; @@ -308,10 +347,6 @@ static int sun4i_ss_probe(struct platform_device *pdev) ss->reset = NULL; } - err = sun4i_ss_enable(ss); - if (err) - goto error_enable; - /* * Check that clock have the correct rates given in the datasheet * Try to set the clock to the maximum allowed @@ -319,7 +354,7 @@ static int sun4i_ss_probe(struct platform_device *pdev) err = clk_set_rate(ss->ssclk, cr_mod); if (err) { dev_err(&pdev->dev, "Cannot set clock rate to ssclk\n"); - goto error_enable; + return err; } /* @@ -347,12 +382,26 @@ static int sun4i_ss_probe(struct platform_device *pdev) dev_warn(&pdev->dev, "Clock ss is at %lu (%lu MHz) (must be <= %lu)\n", cr, cr / 1000000, cr_mod); + ss->dev = &pdev->dev; + platform_set_drvdata(pdev, ss); + + spin_lock_init(&ss->slock); + + err = sun4i_ss_pm_init(ss); + if (err) + return err; + /* * Datasheet named it "Die Bonding ID" * I expect to be a sort of Security System Revision number. * Since the A80 seems to have an other version of SS * this info could be useful */ + + err = pm_runtime_get_sync(ss->dev); + if (err < 0) + goto error_pm; + writel(SS_ENABLED, ss->base + SS_CTL); v = readl(ss->base + SS_CTL); v >>= 16; @@ -360,9 +409,7 @@ static int sun4i_ss_probe(struct platform_device *pdev) dev_info(&pdev->dev, "Die ID %d\n", v); writel(0, ss->base + SS_CTL); - ss->dev = &pdev->dev; - - spin_lock_init(&ss->slock); + pm_runtime_put_sync(ss->dev); for (i = 0; i < ARRAY_SIZE(ss_algs); i++) { ss_algs[i].ss = ss; @@ -392,7 +439,6 @@ static int sun4i_ss_probe(struct platform_device *pdev) break; } } - platform_set_drvdata(pdev, ss); return 0; error_alg: i--; @@ -409,8 +455,8 @@ static int sun4i_ss_probe(struct platform_device *pdev) break; } } -error_enable: - sun4i_ss_disable(ss); +error_pm: + sun4i_ss_pm_exit(ss); return err; } @@ -433,8 +479,7 @@ static int sun4i_ss_remove(struct platform_device *pdev) } } - writel(0, ss->base + SS_CTL); - sun4i_ss_disable(ss); + sun4i_ss_pm_exit(ss); return 0; } @@ -449,6 +494,7 @@ static struct platform_driver sun4i_ss_driver = { .remove = sun4i_ss_remove, .driver = { .name = "sun4i-ss", + .pm = &sun4i_ss_pm_ops, .of_match_table = a20ss_crypto_of_match_table, }, }; diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-hash.c b/drivers/crypto/sunxi-ss/sun4i-ss-hash.c index fcffba5ef927..9930c9ce8971 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-hash.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-hash.c @@ -19,17 +19,29 @@ int sun4i_hash_crainit(struct crypto_tfm *tfm) struct sun4i_tfm_ctx *op = crypto_tfm_ctx(tfm); struct ahash_alg *alg = __crypto_ahash_alg(tfm->__crt_alg); struct sun4i_ss_alg_template *algt; + int err; memset(op, 0, sizeof(struct sun4i_tfm_ctx)); algt = container_of(alg, struct sun4i_ss_alg_template, alg.hash); op->ss = algt->ss; + err = pm_runtime_get_sync(op->ss->dev); + if (err < 0) + return err; + crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), sizeof(struct sun4i_req_ctx)); return 0; } +void sun4i_hash_craexit(struct crypto_tfm *tfm) +{ + struct sun4i_tfm_ctx *op = crypto_tfm_ctx(tfm); + + pm_runtime_put(op->ss->dev); +} + /* sun4i_hash_init: initialize request context */ int sun4i_hash_init(struct ahash_request *areq) { diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-prng.c b/drivers/crypto/sunxi-ss/sun4i-ss-prng.c index 63d636424161..729aafdbea84 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-prng.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-prng.c @@ -17,7 +17,7 @@ int sun4i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src, { struct sun4i_ss_alg_template *algt; struct rng_alg *alg = crypto_rng_alg(tfm); - int i; + int i, err; u32 v; u32 *data = (u32 *)dst; const u32 mode = SS_OP_PRNG | SS_PRNG_CONTINUE | SS_ENABLED; @@ -28,6 +28,10 @@ int sun4i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src, algt = container_of(alg, struct sun4i_ss_alg_template, alg.rng); ss = algt->ss; + err = pm_runtime_get_sync(ss->dev); + if (err < 0) + return err; + spin_lock_bh(&ss->slock); writel(mode, ss->base + SS_CTL); @@ -52,5 +56,8 @@ int sun4i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src, writel(0, ss->base + SS_CTL); spin_unlock_bh(&ss->slock); + + pm_runtime_put(ss->dev); + return 0; } diff --git a/drivers/crypto/sunxi-ss/sun4i-ss.h b/drivers/crypto/sunxi-ss/sun4i-ss.h index 35a27a7145f8..60425ac75d90 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss.h +++ b/drivers/crypto/sunxi-ss/sun4i-ss.h @@ -22,6 +22,7 @@ #include <linux/scatterlist.h> #include <linux/interrupt.h> #include <linux/delay.h> +#include <linux/pm_runtime.h> #include <crypto/md5.h> #include <crypto/skcipher.h> #include <crypto/sha.h> @@ -177,6 +178,7 @@ struct sun4i_req_ctx { }; int sun4i_hash_crainit(struct crypto_tfm *tfm); +void sun4i_hash_craexit(struct crypto_tfm *tfm); int sun4i_hash_init(struct ahash_request *areq); int sun4i_hash_update(struct ahash_request *areq); int sun4i_hash_final(struct ahash_request *areq); -- 2.21.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply related [flat|nested] 10+ messages in thread
* Re: [PATCH v3 2/2] crypto: sun4i-ss: enable pm_runtime 2019-09-24 8:08 ` Corentin Labbe @ 2019-09-25 11:05 ` Maxime Ripard -1 siblings, 0 replies; 10+ messages in thread From: Maxime Ripard @ 2019-09-25 11:05 UTC (permalink / raw) To: Corentin Labbe Cc: davem, herbert, wens, linux-arm-kernel, linux-crypto, linux-kernel, linux-sunxi [-- Attachment #1: Type: text/plain, Size: 427 bytes --] On Tue, Sep 24, 2019 at 10:08:32AM +0200, Corentin Labbe wrote: > This patch enables power management on the Security System. > sun4i-ss now depends on PM because it simplify code and prevent some ifdef. > But this is not a problem since arch maintainer want ARCH_SUNXI to > depend on PM in the future. > > Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com> Acked-by: Maxime Ripard <mripard@kernel.org> Thanks! Maxime [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 228 bytes --] ^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH v3 2/2] crypto: sun4i-ss: enable pm_runtime @ 2019-09-25 11:05 ` Maxime Ripard 0 siblings, 0 replies; 10+ messages in thread From: Maxime Ripard @ 2019-09-25 11:05 UTC (permalink / raw) To: Corentin Labbe Cc: herbert, linux-sunxi, linux-kernel, wens, linux-crypto, davem, linux-arm-kernel [-- Attachment #1.1: Type: text/plain, Size: 427 bytes --] On Tue, Sep 24, 2019 at 10:08:32AM +0200, Corentin Labbe wrote: > This patch enables power management on the Security System. > sun4i-ss now depends on PM because it simplify code and prevent some ifdef. > But this is not a problem since arch maintainer want ARCH_SUNXI to > depend on PM in the future. > > Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com> Acked-by: Maxime Ripard <mripard@kernel.org> Thanks! Maxime [-- Attachment #1.2: signature.asc --] [-- Type: application/pgp-signature, Size: 228 bytes --] [-- Attachment #2: Type: text/plain, Size: 176 bytes --] _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH v3 0/2] crypto: sun4i-ss: Enable power management 2019-09-24 8:08 ` Corentin Labbe @ 2019-10-04 15:45 ` Herbert Xu -1 siblings, 0 replies; 10+ messages in thread From: Herbert Xu @ 2019-10-04 15:45 UTC (permalink / raw) To: Corentin Labbe Cc: davem, mripard, wens, linux-arm-kernel, linux-crypto, linux-kernel, linux-sunxi On Tue, Sep 24, 2019 at 10:08:30AM +0200, Corentin Labbe wrote: > Hello > > This serie enables power management in the sun4i-ss driver. > > Regards > > Changes since v2 ( https://lore.kernel.org/linux-arm-kernel/20190919051035.4111-2-clabbe.montjoie@gmail.com/T/ ): > - depends on PM > - fusioned suspend/resume functions with sun4i_ssenable/disable > - fixed style problem > > Changes since v1: > - Fixed style in patch #1 > - Check more return code of PM functions > - Add PM support in hash/prng > - reworked the probe order of PM functions and the PM strategy > > Corentin Labbe (2): > crypto: sun4i-ss: simplify enable/disable of the device > crypto: sun4i-ss: enable pm_runtime > > drivers/crypto/Kconfig | 1 + > drivers/crypto/sunxi-ss/sun4i-ss-cipher.c | 10 ++ > drivers/crypto/sunxi-ss/sun4i-ss-core.c | 139 ++++++++++++++++------ > drivers/crypto/sunxi-ss/sun4i-ss-hash.c | 12 ++ > drivers/crypto/sunxi-ss/sun4i-ss-prng.c | 9 +- > drivers/crypto/sunxi-ss/sun4i-ss.h | 2 + > 6 files changed, 133 insertions(+), 40 deletions(-) All applied. Thanks. -- Email: Herbert Xu <herbert@gondor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt ^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH v3 0/2] crypto: sun4i-ss: Enable power management @ 2019-10-04 15:45 ` Herbert Xu 0 siblings, 0 replies; 10+ messages in thread From: Herbert Xu @ 2019-10-04 15:45 UTC (permalink / raw) To: Corentin Labbe Cc: linux-sunxi, linux-kernel, mripard, wens, linux-crypto, davem, linux-arm-kernel On Tue, Sep 24, 2019 at 10:08:30AM +0200, Corentin Labbe wrote: > Hello > > This serie enables power management in the sun4i-ss driver. > > Regards > > Changes since v2 ( https://lore.kernel.org/linux-arm-kernel/20190919051035.4111-2-clabbe.montjoie@gmail.com/T/ ): > - depends on PM > - fusioned suspend/resume functions with sun4i_ssenable/disable > - fixed style problem > > Changes since v1: > - Fixed style in patch #1 > - Check more return code of PM functions > - Add PM support in hash/prng > - reworked the probe order of PM functions and the PM strategy > > Corentin Labbe (2): > crypto: sun4i-ss: simplify enable/disable of the device > crypto: sun4i-ss: enable pm_runtime > > drivers/crypto/Kconfig | 1 + > drivers/crypto/sunxi-ss/sun4i-ss-cipher.c | 10 ++ > drivers/crypto/sunxi-ss/sun4i-ss-core.c | 139 ++++++++++++++++------ > drivers/crypto/sunxi-ss/sun4i-ss-hash.c | 12 ++ > drivers/crypto/sunxi-ss/sun4i-ss-prng.c | 9 +- > drivers/crypto/sunxi-ss/sun4i-ss.h | 2 + > 6 files changed, 133 insertions(+), 40 deletions(-) All applied. Thanks. -- Email: Herbert Xu <herbert@gondor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply [flat|nested] 10+ messages in thread
end of thread, other threads:[~2019-10-04 15:46 UTC | newest] Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2019-09-24 8:08 [PATCH v3 0/2] crypto: sun4i-ss: Enable power management Corentin Labbe 2019-09-24 8:08 ` Corentin Labbe 2019-09-24 8:08 ` [PATCH v3 1/2] crypto: sun4i-ss: simplify enable/disable of the device Corentin Labbe 2019-09-24 8:08 ` Corentin Labbe 2019-09-24 8:08 ` [PATCH v3 2/2] crypto: sun4i-ss: enable pm_runtime Corentin Labbe 2019-09-24 8:08 ` Corentin Labbe 2019-09-25 11:05 ` Maxime Ripard 2019-09-25 11:05 ` Maxime Ripard 2019-10-04 15:45 ` [PATCH v3 0/2] crypto: sun4i-ss: Enable power management Herbert Xu 2019-10-04 15:45 ` Herbert Xu
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