/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __NX_842_H__#define __NX_842_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 (0 x00003ff8)#define CCW_FC_842 (0 x00000007)/* 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)struct crypto_scomp;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;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 {/* unused bytes at start of group */ /* compressed bytes in group */ /* bytes after decompression */ struct nx842_crypto_header {/* New members MUST be added within the struct_group() macro below. */ /* NX842_CRYPTO_MAGIC */ /* decompressed end bytes to ignore */ /* total groups in this header */ struct nx842_crypto_header_group group[];struct nx842_crypto_header, group) == sizeof (struct nx842_crypto_header_hdr),"struct member likely outside of struct_group_tagged()" );#define NX842_CRYPTO_GROUP_MAX (0 x20)struct nx842_crypto_ctx {struct nx842_crypto_header_hdr header;struct nx842_crypto_header_group group[NX842_CRYPTO_GROUP_MAX];struct nx842_driver *driver;void *nx842_crypto_alloc_ctx(struct nx842_driver *driver);void nx842_crypto_free_ctx(void *ctx);int nx842_crypto_compress(struct crypto_scomp *tfm,const u8 *src, unsigned int slen,unsigned int *dlen, void *ctx);int nx842_crypto_decompress(struct crypto_scomp *tfm,const u8 *src, unsigned int slen,unsigned int *dlen, void *ctx);#endif /* __NX_842_H__ */
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(vorverarbeitet am 2026-09-30)
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