[linux-6.6.y] LoongArch: Add LoongArch security engine driver support

Documentation/devicetree/bindings/security/loongson_se/se.yaml

@@ -0,0 +1,32 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/security/loongson_se/se.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Loongson SE module
+
+description:
+  Loongson SE module
+maintainers:
+  - Qunqin Zhao <zhaoqunqin@loongson.cn>
+
+allOf:
+  - $ref: se.yaml#
+
+properties:
+  compatible:
+    const: loongson,ls3c6000se
+
+  reg:
+    maxItems: 2
+
+  interrupts:
+    maxItems: 2
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false

MAINTAINERS

@@ -12446,6 +12446,14 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/pinctrl/loongson,ls2k-pinctrl.yaml
 F:	drivers/pinctrl/pinctrl-loongson2.c
 
+LOONGSON SE DRIVER
+M:	Qunqin Zhao <zhaoqunqin@loongson.cn>
+S:	Maintained
+F:	Documentation/devicetree/bindings/security/loongson_se/se.yaml
+F:	arch/loongarch/include/asm/se.h
+F:	drivers/char/loongson_se.c
+F:	drivers/char/lsse_sdf_cdev.c
+
 LOONGSON-2 SOC SERIES THERMAL DRIVER
 M:	zhanghongchen <zhanghongchen@loongson.cn>
 M:	Yinbo Zhu <zhuyinbo@loongson.cn>

arch/loongarch/include/asm/se.h

@@ -0,0 +1,147 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2012 IBM Corporation
+ *
+ * Copyright 2023 Loongson Technology, Inc.
+ * Yinggang Gu <guyinggang@loongson.cn>
+ *
+ * Device driver for Loongson SE module.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, version 2 of the
+ * License.
+ *
+ */
+#ifndef __LOONGSON_SE_H__
+#define __LOONGSON_SE_H__
+
+#define SE_MAILBOX_S			0x0
+#define SE_MAILBOX_L			0x20
+#define SE_S2LINT_STAT			0x88
+#define SE_S2LINT_EN			0x8c
+#define SE_S2LINT_SET			0x90
+#define SE_S2LINT_CL			0x94
+#define SE_L2SINT_STAT			0x98
+#define SE_L2SINT_EN			0x9c
+#define SE_L2SINT_SET			0xa0
+#define SE_L2SINT_CL			0xa4
+
+/* INT bit definition */
+#define SE_INT_SETUP			BIT(0)
+#define SE_INT_SM2				BIT(0)
+#define SE_INT_SM3				BIT(0)
+#define SE_INT_SM4				BIT(0)
+#define SE_INT_RNG				BIT(0)
+#define SE_INT_TPM				BIT(5)
+#define SE_INT_ALL				0xffffffff
+
+#define SE_CMD_START			0x0
+#define SE_CMD_STOP				0x1
+#define SE_CMD_GETVER			0x2
+#define SE_CMD_SETBUF			0x3
+#define SE_CMD_SETMSG			0x4
+
+#define SE_CMD_RNG				0x100
+
+#define SE_CMD_SM2_SIGN			0x200
+#define SE_CMD_SM2_VSIGN		0x201
+
+#define SE_CMD_SM3_DIGEST		0x300
+#define SE_CMD_SM3_UPDATE		0x301
+#define SE_CMD_SM3_FINISH		0x302
+
+#define SE_CMD_SM4_ECB_ENCRY		0x400
+#define SE_CMD_SM4_ECB_DECRY		0x401
+#define SE_CMD_SM4_CBC_ENCRY		0x402
+#define SE_CMD_SM4_CBC_DECRY		0x403
+#define SE_CMD_SM4_CTR			0x404
+
+#define SE_CMD_TPM				0x500
+#define SE_CMD_ZUC_INIT_READ		0x600
+#define SE_CMD_ZUC_READ			0x601
+
+#define SE_CMD_SDF				0x700
+
+#define SE_CH_MAX			32
+
+#define SE_CH_RNG			1
+#define SE_CH_SM2			2
+#define SE_CH_SM3			3
+#define SE_CH_SM4			4
+#define SE_CH_TPM			5
+#define SE_CH_ZUC			6
+#define SE_CH_SDF			7
+
+struct se_msg {
+	u32 cmd;
+	u32 data_off;
+	u32 data_len;
+	u32 info[5];
+};
+
+struct se_cmd {
+	u32 cmd;
+	u32 info[7];
+};
+
+struct se_res {
+	u32 cmd;
+	u32 cmd_ret;
+	u32 info[6];
+};
+
+struct se_mailbox_data {
+	u32 int_bit;
+	union {
+		u32 mailbox[8];
+		struct se_cmd gcmd;
+		struct se_res res;
+	} u;
+};
+
+struct lsse_ch {
+	u32 id;
+	u32 int_bit;
+	struct loongson_se *se;
+	void *priv;
+	spinlock_t ch_lock;
+	void *smsg;
+	void *rmsg;
+	int msg_size;
+	void *data_buffer;
+	dma_addr_t data_addr;
+	int data_size;
+
+	void (*complete)(struct lsse_ch *se_ch);
+};
+
+struct loongson_se {
+	struct device *dev;
+	void __iomem *base;
+	u32 version;
+	u32 ch_status;
+	spinlock_t cmd_lock;
+	spinlock_t dev_lock;
+
+	/* Interaction memory */
+	void *mem_base;
+	dma_addr_t mem_addr;
+	unsigned long *mem_map;
+	int mem_map_size;
+	void *smsg;
+	void *rmsg;
+
+	/* Synchronous CMD */
+	struct completion cmd_completion;
+
+	/* Virtual Channel */
+	struct lsse_ch chs[SE_CH_MAX];
+};
+
+struct lsse_ch *se_init_ch(int id, int data_size, int msg_size, void *priv,
+		void (*complete)(struct lsse_ch *se_ch));
+void se_deinit_ch(struct lsse_ch *ch);
+int se_send_ch_request(struct lsse_ch *ch);
+
+#endif

drivers/char/Kconfig

@@ -391,6 +391,26 @@ config UV_MMTIMER
 	  The uv_mmtimer device allows direct userspace access to the
 	  UV system timer.
 
+config LOONGSON_SE
+	tristate "LOONGSON SECURITY MODULE Interface"
+	depends on LOONGARCH
+	default m
+	help
+	  If you have LOONGSON security module (SE) support say Yes and it
+	  will be accessible from within Linux.
+          To compile this driver as a module, choose M here,the module will
+          be called loongson-se.
+
+config LOONGSON_SE_SDF
+	tristate "LOONGSON SECURITY MODULE SDF Interface"
+	depends on LOONGARCH && LOONGSON_SE
+	default m
+	help
+	  If you want to use LOONGSON security module (SE) as SDF say Yes
+	  and it will be accessible from within Linux.
+          To compile this driver as a module, choose M here,the module will
+          be called loongson-se.
+
 source "drivers/char/tpm/Kconfig"
 
 config TELCLOCK

drivers/char/Makefile

@@ -32,6 +32,8 @@ obj-$(CONFIG_SCx200_GPIO)	+= scx200_gpio.o
 obj-$(CONFIG_PC8736x_GPIO)	+= pc8736x_gpio.o
 obj-$(CONFIG_NSC_GPIO)		+= nsc_gpio.o
 obj-$(CONFIG_TELCLOCK)		+= tlclk.o
+obj-$(CONFIG_LOONGSON_SE)	+= loongson_se.o
+obj-$(CONFIG_LOONGSON_SE_SDF)	+= lsse_sdf_cdev.o
 
 obj-$(CONFIG_MWAVE)		+= mwave/
 obj-y				+= agp/