drivers/crypto/nx/nx-842.h

   1
   2 #ifndef __NX_842_H__
   3 #define __NX_842_H__
   4
   5 #include <linux/kernel.h>
   6 #include <linux/module.h>
   7 #include <linux/sw842.h>
   8 #include <linux/of.h>
   9 #include <linux/slab.h>
  10 #include <linux/io.h>
  11 #include <linux/mm.h>
  12 #include <linux/ratelimit.h>
  13
  14 /* Restrictions on Data Descriptor List (DDL) and Entry (DDE) buffers
  15  *
  16  * From NX P8 workbook, sec 4.9.1 "842 details"
  17  *   Each DDE buffer is 128 byte aligned
  18  *   Each DDE buffer size is a multiple of 32 bytes (except the last)
  19  *   The last DDE buffer size is a multiple of 8 bytes
  20  */
  21 #define DDE_BUFFER_ALIGN        (128)
  22 #define DDE_BUFFER_SIZE_MULT    (32)
  23 #define DDE_BUFFER_LAST_MULT    (8)
  24
  25 /* Arbitrary DDL length limit
  26  * Allows max buffer size of MAX-1 to MAX pages
  27  * (depending on alignment)
  28  */
  29 #define DDL_LEN_MAX             (17)
  30
  31 /* CCW 842 CI/FC masks
  32  * NX P8 workbook, section 4.3.1, figure 4-6
  33  * "CI/FC Boundary by NX CT type"
  34  */
  35 #define CCW_CI_842              (0x00003ff8)
  36 #define CCW_FC_842              (0x00000007)
  37
  38 /* CCW Function Codes (FC) for 842
  39  * NX P8 workbook, section 4.9, table 4-28
  40  * "Function Code Definitions for 842 Memory Compression"
  41  */
  42 #define CCW_FC_842_COMP_NOCRC   (0)
  43 #define CCW_FC_842_COMP_CRC     (1)
  44 #define CCW_FC_842_DECOMP_NOCRC (2)
  45 #define CCW_FC_842_DECOMP_CRC   (3)
  46 #define CCW_FC_842_MOVE         (4)
  47
  48 /* CSB CC Error Types for 842
  49  * NX P8 workbook, section 4.10.3, table 4-30
  50  * "Reported Error Types Summary Table"
  51  */
  52 /* These are all duplicates of existing codes defined in icswx.h. */
  53 #define CSB_CC_TRANSLATION_DUP1 (80)
  54 #define CSB_CC_TRANSLATION_DUP2 (82)
  55 #define CSB_CC_TRANSLATION_DUP3 (84)
  56 #define CSB_CC_TRANSLATION_DUP4 (86)
  57 #define CSB_CC_TRANSLATION_DUP5 (92)
  58 #define CSB_CC_TRANSLATION_DUP6 (94)
  59 #define CSB_CC_PROTECTION_DUP1  (81)
  60 #define CSB_CC_PROTECTION_DUP2  (83)
  61 #define CSB_CC_PROTECTION_DUP3  (85)
  62 #define CSB_CC_PROTECTION_DUP4  (87)
  63 #define CSB_CC_PROTECTION_DUP5  (93)
  64 #define CSB_CC_PROTECTION_DUP6  (95)
  65 #define CSB_CC_RD_EXTERNAL_DUP1 (89)
  66 #define CSB_CC_RD_EXTERNAL_DUP2 (90)
  67 #define CSB_CC_RD_EXTERNAL_DUP3 (91)
  68 /* These are specific to NX */
  69 /* 842 codes */
  70 #define CSB_CC_TPBC_GT_SPBC     (64) /* no error, but >1 comp ratio */
  71 #define CSB_CC_CRC_MISMATCH     (65) /* decomp crc mismatch */
  72 #define CSB_CC_TEMPL_INVALID    (66) /* decomp invalid template value */
  73 #define CSB_CC_TEMPL_OVERFLOW   (67) /* decomp template shows data after end */
  74 /* sym crypt codes */
  75 #define CSB_CC_DECRYPT_OVERFLOW (64)
  76 /* asym crypt codes */
  77 #define CSB_CC_MINV_OVERFLOW    (128)
  78 /* These are reserved for hypervisor use */
  79 #define CSB_CC_HYP_RESERVE_START        (240)
  80 #define CSB_CC_HYP_RESERVE_END          (253)
  81 #define CSB_CC_HYP_NO_HW                (254)
  82 #define CSB_CC_HYP_HANG_ABORTED         (255)
  83
  84 /* CCB Completion Modes (CM) for 842
  85  * NX P8 workbook, section 4.3, figure 4-5
  86  * "CRB Details - Normal Cop_Req (CL=00, C=1)"
  87  */
  88 #define CCB_CM_EXTRA_WRITE      (CCB_CM0_ALL_COMPLETIONS & CCB_CM12_STORE)
  89 #define CCB_CM_INTERRUPT        (CCB_CM0_ALL_COMPLETIONS & CCB_CM12_INTERRUPT)
  90
  91 #define LEN_ON_SIZE(pa, size)   ((size) - ((pa) & ((size) - 1)))
  92 #define LEN_ON_PAGE(pa)         LEN_ON_SIZE(pa, PAGE_SIZE)
  93
  94 static inline unsigned long nx842_get_pa(void *addr)
  95 {
  96         if (!is_vmalloc_addr(addr))
  97                 return __pa(addr);
  98
  99         return page_to_phys(vmalloc_to_page(addr)) + offset_in_page(addr);
 100 }
 101
 102 /* Get/Set bit fields */
 103 #define MASK_LSH(m)             (__builtin_ffsl(m) - 1)
 104 #define GET_FIELD(v, m)         (((v) & (m)) >> MASK_LSH(m))
 105 #define SET_FIELD(v, m, val)    (((v) & ~(m)) | (((val) << MASK_LSH(m)) & (m)))
 106
 107 struct nx842_constraints {
 108         int alignment;
 109         int multiple;
 110         int minimum;
 111         int maximum;
 112 };
 113
 114 struct nx842_driver {
 115         char *name;
 116         struct module *owner;
 117         size_t workmem_size;
 118
 119         struct nx842_constraints *constraints;
 120
 121         int (*compress)(const unsigned char *in, unsigned int in_len,
 122                         unsigned char *out, unsigned int *out_len,
 123                         void *wrkmem);
 124         int (*decompress)(const unsigned char *in, unsigned int in_len,
 125                           unsigned char *out, unsigned int *out_len,
 126                           void *wrkmem);
 127 };
 128
 129 struct nx842_driver *nx842_platform_driver(void);
 130 bool nx842_platform_driver_set(struct nx842_driver *driver);
 131 void nx842_platform_driver_unset(struct nx842_driver *driver);
 132 bool nx842_platform_driver_get(void);
 133 void nx842_platform_driver_put(void);
 134
 135 size_t nx842_workmem_size(void);
 136
 137 int nx842_constraints(struct nx842_constraints *constraints);
 138
 139 int nx842_compress(const unsigned char *in, unsigned int in_len,
 140                    unsigned char *out, unsigned int *out_len, void *wrkmem);
 141 int nx842_decompress(const unsigned char *in, unsigned int in_len,
 142                      unsigned char *out, unsigned int *out_len, void *wrkmem);
 143
 144 #endif /* __NX_842_H__ */