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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 | #ifndef __NX_842_H__ #define __NX_842_H__ #include <linux/kernel.h> #include <linux/init.h> #include <linux/module.h> #include <linux/crypto.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) /* These are reserved for hypervisor use */ #define CSB_CC_HYP_RESERVE_START (240) #define CSB_CC_HYP_RESERVE_END (253) #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); } /* Get/Set bit fields */ #define MASK_LSH(m) (__builtin_ffsl(m) - 1) #define GET_FIELD(v, m) (((v) & (m)) >> MASK_LSH(m)) #define SET_FIELD(v, m, val) (((v) & ~(m)) | (((val) << MASK_LSH(m)) & (m))) /** * 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 { __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 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__ */ |