crypto: ccree - introduce CryptoCell driver

Introduce basic low level Arm TrustZone CryptoCell HW support.
This first patch doesn't actually register any Crypto API
transformations, these will follow up in the next patch.

This first revision supports the CC 712 REE component.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 185 insertions, 0 deletions

diff --git a/drivers/crypto/ccree/cc_driver.h b/drivers/crypto/ccree/cc_driver.h
new file mode 100644
index 000000000000..f1671bd01885
--- /dev/null
+++ b/drivers/crypto/ccree/cc_driver.h
@@ -0,0 +1,185 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2012-2018 ARM Limited or its affiliates. */
+
+/* \file cc_driver.h
+ * ARM CryptoCell Linux Crypto Driver
+ */
+
+#ifndef __CC_DRIVER_H__
+#define __CC_DRIVER_H__
+
+#ifdef COMP_IN_WQ
+#include <linux/workqueue.h>
+#else
+#include <linux/interrupt.h>
+#endif
+#include <linux/dma-mapping.h>
+#include <crypto/algapi.h>
+#include <crypto/aes.h>
+#include <crypto/sha.h>
+#include <crypto/aead.h>
+#include <crypto/authenc.h>
+#include <crypto/hash.h>
+#include <crypto/skcipher.h>
+#include <linux/version.h>
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+
+/* Registers definitions from shared/hw/ree_include */
+#include "cc_host_regs.h"
+#define CC_DEV_SHA_MAX 512
+#include "cc_crypto_ctx.h"
+#include "cc_hw_queue_defs.h"
+#include "cc_sram_mgr.h"
+
+extern bool cc_dump_desc;
+extern bool cc_dump_bytes;
+
+#define DRV_MODULE_VERSION "3.0"
+
+#define CC_DEV_NAME_STR "ccree"
+#define CC_COHERENT_CACHE_PARAMS 0xEEE
+
+/* Maximum DMA mask supported by IP */
+#define DMA_BIT_MASK_LEN 48
+
+#define CC_DEV_SIGNATURE 0xDCC71200UL
+
+#define CC_AXI_IRQ_MASK ((1 << CC_AXIM_CFG_BRESPMASK_BIT_SHIFT) | \
+			  (1 << CC_AXIM_CFG_RRESPMASK_BIT_SHIFT) | \
+			  (1 << CC_AXIM_CFG_INFLTMASK_BIT_SHIFT) | \
+			  (1 << CC_AXIM_CFG_COMPMASK_BIT_SHIFT))
+
+#define CC_AXI_ERR_IRQ_MASK BIT(CC_HOST_IRR_AXI_ERR_INT_BIT_SHIFT)
+
+#define CC_COMP_IRQ_MASK BIT(CC_HOST_IRR_AXIM_COMP_INT_BIT_SHIFT)
+
+#define AXIM_MON_COMP_VALUE GENMASK(CC_AXIM_MON_COMP_VALUE_BIT_SIZE + \
+				    CC_AXIM_MON_COMP_VALUE_BIT_SHIFT, \
+				    CC_AXIM_MON_COMP_VALUE_BIT_SHIFT)
+
+/* Register name mangling macro */
+#define CC_REG(reg_name) CC_ ## reg_name ## _REG_OFFSET
+
+/* TEE FIPS status interrupt */
+#define CC_GPR0_IRQ_MASK BIT(CC_HOST_IRR_GPR0_BIT_SHIFT)
+
+#define CC_CRA_PRIO 400
+
+#define MIN_HW_QUEUE_SIZE 50 /* Minimum size required for proper function */
+
+#define MAX_REQUEST_QUEUE_SIZE 4096
+#define MAX_MLLI_BUFF_SIZE 2080
+#define MAX_ICV_NENTS_SUPPORTED 2
+
+/* Definitions for HW descriptors DIN/DOUT fields */
+#define NS_BIT 1
+#define AXI_ID 0
+/* AXI_ID is not actually the AXI ID of the transaction but the value of AXI_ID
+ * field in the HW descriptor. The DMA engine +8 that value.
+ */
+
+#define CC_MAX_IVGEN_DMA_ADDRESSES	3
+struct cc_crypto_req {
+	void (*user_cb)(struct device *dev, void *req, int err);
+	void *user_arg;
+	dma_addr_t ivgen_dma_addr[CC_MAX_IVGEN_DMA_ADDRESSES];
+	/* For the first 'ivgen_dma_addr_len' addresses of this array,
+	 * generated IV would be placed in it by send_request().
+	 * Same generated IV for all addresses!
+	 */
+	/* Amount of 'ivgen_dma_addr' elements to be filled. */
+	unsigned int ivgen_dma_addr_len;
+	/* The generated IV size required, 8/16 B allowed. */
+	unsigned int ivgen_size;
+	struct completion seq_compl; /* request completion */
+};
+
+/**
+ * struct cc_drvdata - driver private data context
+ * @cc_base:	virt address of the CC registers
+ * @irq:	device IRQ number
+ * @irq_mask:	Interrupt mask shadow (1 for masked interrupts)
+ * @fw_ver:	SeP loaded firmware version
+ */
+struct cc_drvdata {
+	void __iomem *cc_base;
+	int irq;
+	u32 irq_mask;
+	u32 fw_ver;
+	struct completion hw_queue_avail; /* wait for HW queue availability */
+	struct platform_device *plat_dev;
+	cc_sram_addr_t mlli_sram_addr;
+	void *buff_mgr_handle;
+	void *request_mgr_handle;
+	void *ivgen_handle;
+	void *sram_mgr_handle;
+	void *debugfs;
+	struct clk *clk;
+	bool coherent;
+};
+
+struct cc_crypto_alg {
+	struct list_head entry;
+	int cipher_mode;
+	int flow_mode; /* Note: currently, refers to the cipher mode only. */
+	int auth_mode;
+	struct cc_drvdata *drvdata;
+	struct crypto_alg crypto_alg;
+};
+
+struct cc_alg_template {
+	char name[CRYPTO_MAX_ALG_NAME];
+	char driver_name[CRYPTO_MAX_ALG_NAME];
+	unsigned int blocksize;
+	u32 type;
+	union {
+		struct skcipher_alg skcipher;
+		struct aead_alg aead;
+	} template_u;
+	int cipher_mode;
+	int flow_mode; /* Note: currently, refers to the cipher mode only. */
+	int auth_mode;
+	struct cc_drvdata *drvdata;
+};
+
+struct async_gen_req_ctx {
+	dma_addr_t iv_dma_addr;
+	enum drv_crypto_direction op_type;
+};
+
+static inline struct device *drvdata_to_dev(struct cc_drvdata *drvdata)
+{
+	return &drvdata->plat_dev->dev;
+}
+
+void __dump_byte_array(const char *name, const u8 *buf, size_t len);
+static inline void dump_byte_array(const char *name, const u8 *the_array,
+				   size_t size)
+{
+	if (cc_dump_bytes)
+		__dump_byte_array(name, the_array, size);
+}
+
+int init_cc_regs(struct cc_drvdata *drvdata, bool is_probe);
+void fini_cc_regs(struct cc_drvdata *drvdata);
+int cc_clk_on(struct cc_drvdata *drvdata);
+void cc_clk_off(struct cc_drvdata *drvdata);
+
+static inline void cc_iowrite(struct cc_drvdata *drvdata, u32 reg, u32 val)
+{
+	iowrite32(val, (drvdata->cc_base + reg));
+}
+
+static inline u32 cc_ioread(struct cc_drvdata *drvdata, u32 reg)
+{
+	return ioread32(drvdata->cc_base + reg);
+}
+
+static inline gfp_t cc_gfp_flags(struct crypto_async_request *req)
+{
+	return (req->flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
+			GFP_KERNEL : GFP_ATOMIC;
+}
+
+#endif /*__CC_DRIVER_H__*/