LXR linux/drivers/crypto/cavium/cpt/request

   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
  23union 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
  40union opcode_info {
  41        u16 flags;
  42        struct {
  43                u8 major;
  44                u8 minor;
  45        } s;
  46};
  47
  48struct cptvf_request {
  49        union opcode_info opcode;
  50        u16 param1;
  51        u16 param2;
  52        u16 dlen;
  53};
  54
  55struct buf_ptr {
  56        u8 *vptr;
  57        dma_addr_t dma_addr;
  58        u16 size;
  59};
  60
  61struct 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
  75struct 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
  91struct 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 */
 115union vq_cmd_word0 {
 116        u64 u64;
 117        struct {
 118                u16 opcode;
 119                u16 param1;
 120                u16 param2;
 121                u16 dlen;
 122        } s;
 123};
 124
 125union 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
 138struct cpt_vq_command {
 139        union vq_cmd_word0 cmd;
 140        u64 dptr;
 141        u64 rptr;
 142        union vq_cmd_word3 cptr;
 143};
 144
 145void vq_post_process(struct cpt_vf *cptvf, u32 qno);
 146int process_request(struct cpt_vf *cptvf, struct cpt_request_info *req);
 147#endif /* __REQUEST_MANAGER_H */
 148