/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __NX_842_H__
#define __NX_842_H__
#include <crypto/algapi.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/mm.h>
#include <linux/ratelimit.h>
/* Restrictions on Data Descriptor List (DDL) and Entry (DDE) buffers
*
* From NX P8 workbook, sec 4.9.1 "842 details"
* Each DDE buffer is 128 byte aligned
* Each DDE buffer size is a multiple of 32 bytes (except the last)
* The last DDE buffer size is a multiple of 8 bytes
*/
#define DDE_BUFFER_ALIGN (128)
#define DDE_BUFFER_SIZE_MULT (32)
#define DDE_BUFFER_LAST_MULT (8)
/* Arbitrary DDL length limit
* Allows max buffer size of MAX-1 to MAX pages
* (depending on alignment)
*/
#define DDL_LEN_MAX (17)
/* CCW 842 CI/FC masks
* NX P8 workbook, section 4.3.1, figure 4-6
* "CI/FC Boundary by NX CT type"
*/
#define CCW_CI_842 (0x00003ff8)
#define CCW_FC_842 (0x00000007)
/* CCW Function Codes (FC) for 842
* NX P8 workbook, section 4.9, table 4-28
* "Function Code Definitions for 842 Memory Compression"
*/
#define CCW_FC_842_COMP_NOCRC (0)
#define CCW_FC_842_COMP_CRC (1)
#define CCW_FC_842_DECOMP_NOCRC (2)
#define CCW_FC_842_DECOMP_CRC (3)
#define CCW_FC_842_MOVE (4)
/* CSB CC Error Types for 842
* NX P8 workbook, section 4.10.3, table 4-30
* "Reported Error Types Summary Table"
*/
/* These are all duplicates of existing codes defined in icswx.h. */
#define CSB_CC_TRANSLATION_DUP1 (80)
#define CSB_CC_TRANSLATION_DUP2 (82)
#define CSB_CC_TRANSLATION_DUP3 (84)
#define CSB_CC_TRANSLATION_DUP4 (86)
#define CSB_CC_TRANSLATION_DUP5 (92)
#define CSB_CC_TRANSLATION_DUP6 (94)
#define CSB_CC_PROTECTION_DUP1 (81)
#define CSB_CC_PROTECTION_DUP2 (83)
#define CSB_CC_PROTECTION_DUP3 (85)
#define CSB_CC_PROTECTION_DUP4 (87)
#define CSB_CC_PROTECTION_DUP5 (93)
#define CSB_CC_PROTECTION_DUP6 (95)
#define CSB_CC_RD_EXTERNAL_DUP1 (89)
#define CSB_CC_RD_EXTERNAL_DUP2 (90)
#define CSB_CC_RD_EXTERNAL_DUP3 (91)
/* These are specific to NX */
/* 842 codes */
#define CSB_CC_TPBC_GT_SPBC (64) /* no error, but >1 comp ratio */
#define CSB_CC_CRC_MISMATCH (65) /* decomp crc mismatch */
#define CSB_CC_TEMPL_INVALID (66) /* decomp invalid template value */
#define CSB_CC_TEMPL_OVERFLOW (67) /* decomp template shows data after end */
/* sym crypt codes */
#define CSB_CC_DECRYPT_OVERFLOW (64)
/* asym crypt codes */
#define CSB_CC_MINV_OVERFLOW (128)
/*
* HW error - Job did not finish in the maximum time allowed.
* Job terminated.
*/
#define CSB_CC_HW_EXPIRED_TIMER (224)
/* These are reserved for hypervisor use */
#define CSB_CC_HYP_RESERVE_START (240)
#define CSB_CC_HYP_RESERVE_END (253)
#define CSB_CC_HYP_RESERVE_P9_END (251)
/* No valid interrupt server (P9 or later). */
#define CSB_CC_HYP_RESERVE_NO_INTR_SERVER (252)
#define CSB_CC_HYP_NO_HW (254)
#define CSB_CC_HYP_HANG_ABORTED (255)
/* CCB Completion Modes (CM) for 842
* NX P8 workbook, section 4.3, figure 4-5
* "CRB Details - Normal Cop_Req (CL=00, C=1)"
*/
#define CCB_CM_EXTRA_WRITE (CCB_CM0_ALL_COMPLETIONS & CCB_CM12_STORE)
#define CCB_CM_INTERRUPT (CCB_CM0_ALL_COMPLETIONS & CCB_CM12_INTERRUPT)
#define LEN_ON_SIZE(pa, size) ((size) - ((pa) & ((size) - 1)))
#define LEN_ON_PAGE(pa) LEN_ON_SIZE(pa, PAGE_SIZE)
static inline unsigned long nx842_get_pa(void *addr)
{
if (!is_vmalloc_addr(addr))
return __pa(addr);
return page_to_phys(vmalloc_to_page(addr)) + offset_in_page(addr);
}
/**
* This provides the driver's constraints. Different nx842 implementations
* may have varying requirements. The constraints are:
* @alignment: All buffers should be aligned to this
* @multiple: All buffer lengths should be a multiple of this
* @minimum: Buffer lengths must not be less than this amount
* @maximum: Buffer lengths must not be more than this amount
*
* The constraints apply to all buffers and lengths, both input and output,
* for both compression and decompression, except for the minimum which
* only applies to compression input and decompression output; the
* compressed data can be less than the minimum constraint. It can be
* assumed that compressed data will always adhere to the multiple
* constraint.
*
* The driver may succeed even if these constraints are violated;
* however the driver can return failure or suffer reduced performance
* if any constraint is not met.
*/
struct nx842_constraints {
int alignment;
int multiple;
int minimum;
int maximum;
};
struct nx842_driver {
char *name;
struct module *owner;
size_t workmem_size;
struct nx842_constraints *constraints;
int (*compress)(const unsigned char *in, unsigned int in_len,
unsigned char *out, unsigned int *out_len,
void *wrkmem);
int (*decompress)(const unsigned char *in, unsigned int in_len,
unsigned char *out, unsigned int *out_len,
void *wrkmem);
};
struct nx842_crypto_header_group {
__be16 padding; /* unused bytes at start of group */
__be32 compressed_length; /* compressed bytes in group */
__be32 uncompressed_length; /* bytes after decompression */
} __packed;
struct nx842_crypto_header {
struct_group_tagged(nx842_crypto_header_hdr, hdr,
__be16 magic; /* NX842_CRYPTO_MAGIC */
__be16 ignore; /* decompressed end bytes to ignore */
u8 groups; /* total groups in this header */
);
struct nx842_crypto_header_group group[];
} __packed;
#define NX842_CRYPTO_GROUP_MAX (0x20)
struct nx842_crypto_ctx {
spinlock_t lock;
u8 *wmem;
u8 *sbounce, *dbounce;
struct nx842_crypto_header_hdr header;
struct nx842_crypto_header_group group[NX842_CRYPTO_GROUP_MAX];
struct nx842_driver *driver;
};
int nx842_crypto_init(struct crypto_tfm *tfm, struct nx842_driver *driver);
void nx842_crypto_exit(struct crypto_tfm *tfm);
int nx842_crypto_compress(struct crypto_tfm *tfm,
const u8 *src, unsigned int slen,
u8 *dst, unsigned int *dlen);
int nx842_crypto_decompress(struct crypto_tfm *tfm,
const u8 *src, unsigned int slen,
u8 *dst, unsigned int *dlen);
#endif /* __NX_842_H__ */
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