From patchwork Tue May 6 03:19:44 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qunqin Zhao X-Patchwork-Id: 887888 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 1A51428C02B; Tue, 6 May 2025 03:18:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746501539; cv=none; b=kccCXX7wLCZL5l7aN+sbom/4fJA4+FYFQ4cBrDS1WctDDhpCy+tALWbs5PFrZFyzKpGcPMGJzyv+uZJ2Pb3xwj39m1ws3FlOTG7q5cYc+Lz1d0fmBiXrm9LUREOLk1RxyggHQkg9FIhSWzbXg01XAX9FXWuqsIq4nKPHwO1IG6w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746501539; c=relaxed/simple; bh=td7+9bsL4X+8x1xQv02DxRpHNz5O1/IlVOCeN1UpYDI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=tAzGexefkpCcS7s25R6qoL1vZucfdpX3sXJPWABL9lyKs2jbn3nB0BNwr5QY8N5DZzzACL0fl4Fq/60p3q7RG5rJLn2hCF9/wIMO6uJ3LaE4VJVRTJvzXGNiTSCOD8RtLs4zS8tFJBQFrA0RJNMI19JELQfoGCeBPuMdyoGokn8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [10.40.54.178]) by gateway (Coremail) with SMTP id _____8DxzOKefxlopUrWAA--.23700S3; Tue, 06 May 2025 11:18:54 +0800 (CST) Received: from localhost.localdomain (unknown [10.40.54.178]) by front1 (Coremail) with SMTP id qMiowMCx7MSPfxloqre1AA--.770S4; Tue, 06 May 2025 11:18:47 +0800 (CST) From: Qunqin Zhao To: lee@kernel.org, herbert@gondor.apana.org.au, davem@davemloft.net, peterhuewe@gmx.de, jarkko@kernel.org Cc: linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-crypto@vger.kernel.org, jgg@ziepe.ca, linux-integrity@vger.kernel.org, pmenzel@molgen.mpg.de, Qunqin Zhao , Yinggang Gu , Huacai Chen Subject: [PATCH v9 2/5] crypto: loongson - add Loongson RNG driver support Date: Tue, 6 May 2025 11:19:44 +0800 Message-ID: <20250506031947.11130-3-zhaoqunqin@loongson.cn> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20250506031947.11130-1-zhaoqunqin@loongson.cn> References: <20250506031947.11130-1-zhaoqunqin@loongson.cn> Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: qMiowMCx7MSPfxloqre1AA--.770S4 X-CM-SenderInfo: 52kd01pxqtx0o6or00hjvr0hdfq/ X-Coremail-Antispam: 1Uk129KBj93XoW3Jr15Cw18Wr1ktF1rtw15Jrc_yoW3XryxpF 4Fy34UCrW5GFsrCFZ5trW5CrW5ZasIvr9rKFZrX345Wr97Ar1kXrWxJFyUAFW7ArZ7GrW3 XFZ3GF48Ka1UG3gCm3ZEXasCq-sJn29KB7ZKAUJUUUU3529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUBYb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r1Y6r17M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Cr0_Gr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v2 6rxl6s0DM2kKe7AKxVWUAVWUtwAS0I0E0xvYzxvE52x082IY62kv0487Mc804VCY07AIYI kI8VC2zVCFFI0UMc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWUtVWr XwAv7VC2z280aVAFwI0_Gr0_Cr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI4 8JMxkF7I0En4kS14v26r126r1DMxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j 6r4UMxCIbckI1I0E14v26r126r1DMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwV AFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtVW8ZwCIc40Y0x0EwIxGrwCI42IY6xIIjxv2 0xvE14v26ryj6F1UMIIF0xvE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwCI42IY6xAIw20EY4 v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Gr0_Cr1lIxAIcVC2z280aVCY1x0267AK xVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7IU8_gA5UUUUU== Loongson's Random Number Generator is found inside Loongson Security Engine chip. Co-developed-by: Yinggang Gu Signed-off-by: Yinggang Gu Signed-off-by: Qunqin Zhao Reviewed-by: Huacai Chen --- v8: Added reseed callbak. "lsrng" --> "loongson_rng". v7: Change the lsrng_ prefix to loongson_rng_ v6: Replace all "ls6000se" with "loongson" v2-v5: None drivers/crypto/Kconfig | 1 + drivers/crypto/Makefile | 1 + drivers/crypto/loongson/Kconfig | 5 + drivers/crypto/loongson/Makefile | 1 + drivers/crypto/loongson/loongson-rng.c | 197 +++++++++++++++++++++++++ 5 files changed, 205 insertions(+) create mode 100644 drivers/crypto/loongson/Kconfig create mode 100644 drivers/crypto/loongson/Makefile create mode 100644 drivers/crypto/loongson/loongson-rng.c diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig index 470827820..371a2bd58 100644 --- a/drivers/crypto/Kconfig +++ b/drivers/crypto/Kconfig @@ -833,6 +833,7 @@ config CRYPTO_DEV_CCREE If unsure say Y. source "drivers/crypto/hisilicon/Kconfig" +source "drivers/crypto/loongson/Kconfig" source "drivers/crypto/amlogic/Kconfig" diff --git a/drivers/crypto/Makefile b/drivers/crypto/Makefile index c97f0ebc5..fbd039058 100644 --- a/drivers/crypto/Makefile +++ b/drivers/crypto/Makefile @@ -47,6 +47,7 @@ obj-y += inside-secure/ obj-$(CONFIG_CRYPTO_DEV_ARTPEC6) += axis/ obj-y += xilinx/ obj-y += hisilicon/ +obj-y += loongson/ obj-$(CONFIG_CRYPTO_DEV_AMLOGIC_GXL) += amlogic/ obj-y += intel/ obj-y += starfive/ diff --git a/drivers/crypto/loongson/Kconfig b/drivers/crypto/loongson/Kconfig new file mode 100644 index 000000000..15475da8f --- /dev/null +++ b/drivers/crypto/loongson/Kconfig @@ -0,0 +1,5 @@ +config CRYPTO_DEV_LOONGSON_RNG + tristate "Support for Loongson RNG Driver" + depends on MFD_LOONGSON_SE + help + Support for Loongson RNG Driver. diff --git a/drivers/crypto/loongson/Makefile b/drivers/crypto/loongson/Makefile new file mode 100644 index 000000000..1ce5ec32b --- /dev/null +++ b/drivers/crypto/loongson/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_CRYPTO_DEV_LOONGSON_RNG) += loongson-rng.o diff --git a/drivers/crypto/loongson/loongson-rng.c b/drivers/crypto/loongson/loongson-rng.c new file mode 100644 index 000000000..bc0a4404b --- /dev/null +++ b/drivers/crypto/loongson/loongson-rng.c @@ -0,0 +1,197 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2019 HiSilicon Limited. */ +/* Copyright (c) 2025 Loongson Technology Corporation Limited. */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define SE_SEED_SIZE 32 + +struct loongson_rng_list { + struct mutex lock; + struct list_head list; + int is_init; +}; + +struct loongson_rng { + bool is_used; + struct loongson_se_engine *engine; + struct list_head list; +}; + +struct loongson_rng_ctx { + struct loongson_rng *rng; +}; + +struct loongson_rng_cmd { + u32 cmd_id; + union { + u32 len; + u32 ret; + } u; + u32 seed_off; + u32 out_off; + u32 pad[4]; +}; + +static atomic_t rng_active_devs; +static struct loongson_rng_list rng_devices; + +static int loongson_rng_generate(struct crypto_rng *tfm, const u8 *src, + unsigned int slen, u8 *dstn, unsigned int dlen) +{ + struct loongson_rng_ctx *ctx = crypto_rng_ctx(tfm); + struct loongson_rng *rng = ctx->rng; + struct loongson_rng_cmd *cmd = rng->engine->command; + int err, len; + + cmd->seed_off = 0; + do { + len = min(dlen, rng->engine->buffer_size); + cmd = rng->engine->command; + cmd->u.len = len; + err = loongson_se_send_engine_cmd(rng->engine); + if (err) + return err; + + cmd = rng->engine->command_ret; + if (cmd->u.ret) + return -EFAULT; + + memcpy(dstn, rng->engine->data_buffer, len); + dlen -= len; + dstn += len; + } while (dlen > 0); + + return 0; +} + +static int loongson_rng_init(struct crypto_tfm *tfm) +{ + struct loongson_rng_ctx *ctx = crypto_tfm_ctx(tfm); + struct loongson_rng *rng; + int ret = -EBUSY; + + mutex_lock(&rng_devices.lock); + list_for_each_entry(rng, &rng_devices.list, list) { + if (!rng->is_used) { + rng->is_used = true; + ctx->rng = rng; + ret = 0; + break; + } + } + mutex_unlock(&rng_devices.lock); + + return ret; +} + +static void loongson_rng_exit(struct crypto_tfm *tfm) +{ + struct loongson_rng_ctx *ctx = crypto_tfm_ctx(tfm); + + mutex_lock(&rng_devices.lock); + ctx->rng->is_used = false; + mutex_unlock(&rng_devices.lock); +} + +static int loongson_rng_seed(struct crypto_rng *tfm, const u8 *seed, + unsigned int slen) +{ + struct loongson_rng_ctx *ctx = crypto_rng_ctx(tfm); + struct loongson_rng *rng = ctx->rng; + struct loongson_rng_cmd *cmd; + int err; + + cmd = rng->engine->command; + cmd->u.len = slen; + cmd->seed_off = rng->engine->buffer_off; + memcpy(rng->engine->data_buffer, seed, slen); + err = loongson_se_send_engine_cmd(rng->engine); + cmd = rng->engine->command_ret; + if (err || cmd->u.ret) + return -EFAULT; + + return 0; +} + +static struct rng_alg loongson_rng_alg = { + .generate = loongson_rng_generate, + .seed = loongson_rng_seed, + .seedsize = SE_SEED_SIZE, + .base = { + .cra_name = "stdrng", + .cra_driver_name = "loongson_stdrng", + .cra_priority = 300, + .cra_ctxsize = sizeof(struct loongson_rng_ctx), + .cra_module = THIS_MODULE, + .cra_init = loongson_rng_init, + .cra_exit = loongson_rng_exit, + }, +}; + +static void loongson_rng_add_to_list(struct loongson_rng *rng) +{ + mutex_lock(&rng_devices.lock); + list_add_tail(&rng->list, &rng_devices.list); + mutex_unlock(&rng_devices.lock); +} + +static int loongson_rng_probe(struct platform_device *pdev) +{ + struct loongson_rng_cmd *cmd; + struct loongson_rng *rng; + int ret; + + rng = devm_kzalloc(&pdev->dev, sizeof(*rng), GFP_KERNEL); + if (!rng) + return -ENOMEM; + + rng->engine = loongson_se_init_engine(pdev->dev.parent, SE_ENGINE_RNG); + if (!rng->engine) + return -ENODEV; + cmd = rng->engine->command; + cmd->cmd_id = SE_CMD_RNG; + cmd->out_off = rng->engine->buffer_off; + + if (!rng_devices.is_init) { + ret = crypto_register_rng(&loongson_rng_alg); + if (ret) { + dev_err(&pdev->dev, "failed to register crypto(%d)\n", ret); + return ret; + } + INIT_LIST_HEAD(&rng_devices.list); + mutex_init(&rng_devices.lock); + rng_devices.is_init = true; + } + + loongson_rng_add_to_list(rng); + atomic_inc(&rng_active_devs); + + return 0; +} + +static struct platform_driver loongson_rng_driver = { + .probe = loongson_rng_probe, + .driver = { + .name = "loongson-rng", + }, +}; +module_platform_driver(loongson_rng_driver); + +MODULE_ALIAS("platform:loongson-rng"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Yinggang Gu "); +MODULE_AUTHOR("Qunqin Zhao "); +MODULE_DESCRIPTION("Loongson random number generator driver");