drivers/crypto/cavium/cpt/request_manager.h

   1 /*
   2  * Copyright (C) 2016 Cavium, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License
   6  * as published by the Free Software Foundation.
   7  */
   8
   9 #ifndef __REQUEST_MANAGER_H
  10 #define __REQUEST_MANAGER_H
  11
  12 #include "cpt_common.h"
  13
  14 #define TIME_IN_RESET_COUNT  5
  15 #define COMPLETION_CODE_SIZE 8
  16 #define COMPLETION_CODE_INIT 0
  17 #define PENDING_THOLD  100
  18 #define MAX_SG_IN_CNT 12
  19 #define MAX_SG_OUT_CNT 13
  20 #define SG_LIST_HDR_SIZE  8
  21 #define MAX_BUF_CNT     16
  22
  23 union ctrl_info {
  24         u32 flags;
  25         struct {
  26 #if defined(__BIG_ENDIAN_BITFIELD)
  27                 u32 reserved0:26;
  28                 u32 grp:3; /* Group bits */
  29                 u32 dma_mode:2; /* DMA mode */
  30                 u32 se_req:1;/* To SE core */
  31 #else
  32                 u32 se_req:1; /* To SE core */
  33                 u32 dma_mode:2; /* DMA mode */
  34                 u32 grp:3; /* Group bits */
  35                 u32 reserved0:26;
  36 #endif
  37         } s;
  38 };
  39
  40 union opcode_info {
  41         u16 flags;
  42         struct {
  43                 u8 major;
  44                 u8 minor;
  45         } s;
  46 };
  47
  48 struct cptvf_request {
  49         union opcode_info opcode;
  50         u16 param1;
  51         u16 param2;
  52         u16 dlen;
  53 };
  54
  55 struct buf_ptr {
  56         u8 *vptr;
  57         dma_addr_t dma_addr;
  58         u16 size;
  59 };
  60
  61 struct cpt_request_info {
  62         u8 incnt; /* Number of input buffers */
  63         u8 outcnt; /* Number of output buffers */
  64         u16 rlen; /* Output length */
  65         union ctrl_info ctrl; /* User control information */
  66         struct cptvf_request req; /* Request Information (Core specific) */
  67
  68         struct buf_ptr in[MAX_BUF_CNT];
  69         struct buf_ptr out[MAX_BUF_CNT];
  70
  71         void (*callback)(int, void *); /* Kernel ASYNC request callabck */
  72         void *callback_arg; /* Kernel ASYNC request callabck arg */
  73 };
  74
  75 struct sglist_component {
  76         union {
  77                 u64 len;
  78                 struct {
  79                         u16 len0;
  80                         u16 len1;
  81                         u16 len2;
  82                         u16 len3;
  83                 } s;
  84         } u;
  85         u64 ptr0;
  86         u64 ptr1;
  87         u64 ptr2;
  88         u64 ptr3;
  89 };
  90
  91 struct cpt_info_buffer {
  92         struct cpt_vf *cptvf;
  93         unsigned long time_in;
  94         u8 extra_time;
  95
  96         struct cpt_request_info *req;
  97         dma_addr_t dptr_baddr;
  98         u32 dlen;
  99         dma_addr_t rptr_baddr;
 100         dma_addr_t comp_baddr;
 101         u8 *in_buffer;
 102         u8 *out_buffer;
 103         u8 *gather_components;
 104         u8 *scatter_components;
 105
 106         struct pending_entry *pentry;
 107         volatile u64 *completion_addr;
 108         volatile u64 *alternate_caddr;
 109 };
 110
 111 /*
 112  * CPT_INST_S software command definitions
 113  * Words EI (0-3)
 114  */
 115 union vq_cmd_word0 {
 116         u64 u64;
 117         struct {
 118                 u16 opcode;
 119                 u16 param1;
 120                 u16 param2;
 121                 u16 dlen;
 122         } s;
 123 };
 124
 125 union vq_cmd_word3 {
 126         u64 u64;
 127         struct {
 128 #if defined(__BIG_ENDIAN_BITFIELD)
 129                 u64 grp:3;
 130                 u64 cptr:61;
 131 #else
 132                 u64 cptr:61;
 133                 u64 grp:3;
 134 #endif
 135         } s;
 136 };
 137
 138 struct cpt_vq_command {
 139         union vq_cmd_word0 cmd;
 140         u64 dptr;
 141         u64 rptr;
 142         union vq_cmd_word3 cptr;
 143 };
 144
 145 void vq_post_process(struct cpt_vf *cptvf, u32 qno);
 146 int process_request(struct cpt_vf *cptvf, struct cpt_request_info *req);
 147 #endif /* __REQUEST_MANAGER_H */