/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2016 Cavium, Inc.
 */

#ifndef __REQUEST_MANAGER_H
#define __REQUEST_MANAGER_H

#include "cpt_common.h"

#define TIME_IN_RESET_COUNT  5
#define COMPLETION_CODE_SIZE 8
#define COMPLETION_CODE_INIT 0
#define PENDING_THOLD  100
#define MAX_SG_IN_CNT 12
#define MAX_SG_OUT_CNT 13
#define SG_LIST_HDR_SIZE  8
#define MAX_BUF_CNT     16

union ctrl_info {
        u32 flags;
        struct {
#if defined(__BIG_ENDIAN_BITFIELD)
                u32 reserved0:26;
                u32 grp:3; /* Group bits */
                u32 dma_mode:2; /* DMA mode */
                u32 se_req:1;/* To SE core */
#else
                u32 se_req:1; /* To SE core */
                u32 dma_mode:2; /* DMA mode */
                u32 grp:3; /* Group bits */
                u32 reserved0:26;
#endif
        } s;
};

union opcode_info {
        u16 flags;
        struct {
                u8 major;
                u8 minor;
        } s;
};

struct cptvf_request {
        union opcode_info opcode;
        u16 param1;
        u16 param2;
        u16 dlen;
};

struct buf_ptr {
        u8 *vptr;
        dma_addr_t dma_addr;
        u16 size;
};

struct cpt_request_info {
        u8 incnt; /* Number of input buffers */
        u8 outcnt; /* Number of output buffers */
        u16 rlen; /* Output length */
        union ctrl_info ctrl; /* User control information */
        struct cptvf_request req; /* Request Information (Core specific) */

        bool may_sleep;

        struct buf_ptr in[MAX_BUF_CNT];
        struct buf_ptr out[MAX_BUF_CNT];

        void (*callback)(int, void *); /* Kernel ASYNC request callabck */
        void *callback_arg; /* Kernel ASYNC request callabck arg */
};

struct sglist_component {
        union {
                u64 len;
                struct {
                        __be16 len0;
                        __be16 len1;
                        __be16 len2;
                        __be16 len3;
                } s;
        } u;
        __be64 ptr0;
        __be64 ptr1;
        __be64 ptr2;
        __be64 ptr3;
};

struct cpt_info_buffer {
        struct cpt_vf *cptvf;
        unsigned long time_in;
        u8 extra_time;

        struct cpt_request_info *req;
        dma_addr_t dptr_baddr;
        u32 dlen;
        dma_addr_t rptr_baddr;
        dma_addr_t comp_baddr;
        u8 *in_buffer;
        u8 *out_buffer;
        u8 *gather_components;
        u8 *scatter_components;

        struct pending_entry *pentry;
        volatile u64 *completion_addr;
        volatile u64 *alternate_caddr;
};

/*
 * CPT_INST_S software command definitions
 * Words EI (0-3)
 */
union vq_cmd_word0 {
        u64 u64;
        struct {
                __be16 opcode;
                __be16 param1;
                __be16 param2;
                __be16 dlen;
        } s;
};

union vq_cmd_word3 {
        u64 u64;
        struct {
#if defined(__BIG_ENDIAN_BITFIELD)
                u64 grp:3;
                u64 cptr:61;
#else
                u64 cptr:61;
                u64 grp:3;
#endif
        } s;
};

struct cpt_vq_command {
        union vq_cmd_word0 cmd;
        u64 dptr;
        u64 rptr;
        union vq_cmd_word3 cptr;
};

void vq_post_process(struct cpt_vf *cptvf, u32 qno);
int process_request(struct cpt_vf *cptvf, struct cpt_request_info *req);
#endif /* __REQUEST_MANAGER_H */