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/*
* Copyright (C) 2012-2017 ARM Limited or its affiliates.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
/* \file ssi_driver.h
* ARM CryptoCell Linux Crypto Driver
*/
#ifndef __CC_DRIVER_H__
#define __CC_DRIVER_H__
#include "ssi_config.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/internal/skcipher.h>
#include <crypto/aes.h>
#include <crypto/sha.h>
#include <crypto/aead.h>
#include <crypto/authenc.h>
#include <crypto/hash.h>
#include <linux/version.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
/* Registers definitions from shared/hw/ree_include */
#include "dx_host.h"
#include "dx_reg_common.h"
#define CC_SUPPORT_SHA CC_DEV_SHA_MAX
#include "cc_crypto_ctx.h"
#include "ssi_sysfs.h"
#include "hash_defs.h"
#include "cc_hw_queue_defs.h"
#include "ssi_sram_mgr.h"
#define DRV_MODULE_VERSION "3.0"
#define CC_DEV_NAME_STR "cc715ree"
#define CC_COHERENT_CACHE_PARAMS 0xEEE
#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 3000
#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 ssi_crypto_req {
void (*user_cb)(struct device *dev, void *req);
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 ssi_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 ssi_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;
ssi_sram_addr_t mlli_sram_addr;
void *buff_mgr_handle;
void *hash_handle;
void *aead_handle;
void *blkcipher_handle;
void *request_mgr_handle;
void *fips_handle;
void *ivgen_handle;
void *sram_mgr_handle;
struct clk *clk;
bool coherent;
};
struct ssi_crypto_alg {
struct list_head entry;
int cipher_mode;
int flow_mode; /* Note: currently, refers to the cipher mode only. */
int auth_mode;
struct ssi_drvdata *drvdata;
struct crypto_alg crypto_alg;
struct aead_alg aead_alg;
};
struct ssi_alg_template {
char name[CRYPTO_MAX_ALG_NAME];
char driver_name[CRYPTO_MAX_ALG_NAME];
unsigned int blocksize;
u32 type;
union {
struct ablkcipher_alg ablkcipher;
struct aead_alg aead;
struct blkcipher_alg blkcipher;
struct cipher_alg cipher;
struct compress_alg compress;
} template_u;
int cipher_mode;
int flow_mode; /* Note: currently, refers to the cipher mode only. */
int auth_mode;
struct ssi_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 ssi_drvdata *drvdata)
{
return &drvdata->plat_dev->dev;
}
#ifdef CC_DUMP_BYTES
void dump_byte_array(const char *name, const u8 *the_array,
unsigned long size);
#else
static inline void dump_byte_array(const char *name, const u8 *the_array,
unsigned long size) {};
#endif
int init_cc_regs(struct ssi_drvdata *drvdata, bool is_probe);
void fini_cc_regs(struct ssi_drvdata *drvdata);
int cc_clk_on(struct ssi_drvdata *drvdata);
void cc_clk_off(struct ssi_drvdata *drvdata);
static inline void cc_iowrite(struct ssi_drvdata *drvdata, u32 reg, u32 val)
{
iowrite32(val, (drvdata->cc_base + reg));
}
static inline u32 cc_ioread(struct ssi_drvdata *drvdata, u32 reg)
{
return ioread32(drvdata->cc_base + reg);
}
#endif /*__CC_DRIVER_H__*/
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