/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2018, Intel Corporation. */

#ifndef _ICE_CONTROLQ_H_
#define _ICE_CONTROLQ_H_

#include "ice_adminq_cmd.h"

/* Maximum buffer lengths for all control queue types */
#define ICE_AQ_MAX_BUF_LEN 4096
#define ICE_MBXQ_MAX_BUF_LEN 4096
#define ICE_SBQ_MAX_BUF_LEN 512

#define ICE_CTL_Q_DESC(R, i) \
        (&(((struct libie_aq_desc *)((R).desc_buf.va))[i]))

#define ICE_CTL_Q_DESC_UNUSED(R) \
        ((u16)((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
               (R)->next_to_clean - (R)->next_to_use - 1))

/* Defines that help manage the driver vs FW API checks.
 * Take a look at ice_aq_ver_check in ice_controlq.c for actual usage.
 */
#define EXP_FW_API_VER_MAJOR_E810       0x01
#define EXP_FW_API_VER_MINOR_E810       0x05

#define EXP_FW_API_VER_MAJOR_E830       0x01
#define EXP_FW_API_VER_MINOR_E830       0x07

#define EXP_FW_API_VER_MAJOR_BY_MAC(hw) ((hw)->mac_type == ICE_MAC_E830 ? \
                                         EXP_FW_API_VER_MAJOR_E830 : \
                                         EXP_FW_API_VER_MAJOR_E810)
#define EXP_FW_API_VER_MINOR_BY_MAC(hw) ((hw)->mac_type == ICE_MAC_E830 ? \
                                         EXP_FW_API_VER_MINOR_E830 : \
                                         EXP_FW_API_VER_MINOR_E810)

/* Different control queue types: These are mainly for SW consumption. */
enum ice_ctl_q {
        ICE_CTL_Q_UNKNOWN = 0,
        ICE_CTL_Q_ADMIN,
        ICE_CTL_Q_MAILBOX,
        ICE_CTL_Q_SB,
};

/* Control Queue timeout settings - max delay 1s */
#define ICE_CTL_Q_SQ_CMD_TIMEOUT        USEC_PER_SEC
#define ICE_CTL_Q_ADMIN_INIT_TIMEOUT    10    /* Count 10 times */
#define ICE_CTL_Q_ADMIN_INIT_MSEC       100   /* Check every 100msec */

struct ice_ctl_q_ring {
        void *dma_head;                 /* Virtual address to DMA head */
        struct ice_dma_mem desc_buf;    /* descriptor ring memory */

        union {
                struct ice_dma_mem *sq_bi;
                struct ice_dma_mem *rq_bi;
        } r;

        u16 count;              /* Number of descriptors */

        /* used for interrupt processing */
        u16 next_to_use;
        u16 next_to_clean;

        /* used for queue tracking */
        u32 head;
        u32 tail;
        u32 len;
        u32 bah;
        u32 bal;
        u32 len_mask;
        u32 len_ena_mask;
        u32 len_crit_mask;
        u32 head_mask;
};

/* sq transaction details */
struct ice_sq_cd {
        struct libie_aq_desc *wb_desc;
};

/* rq event information */
struct ice_rq_event_info {
        struct libie_aq_desc desc;
        u16 msg_len;
        u16 buf_len;
        u8 *msg_buf;
};

/* Control Queue information */
struct ice_ctl_q_info {
        enum ice_ctl_q qtype;
        struct ice_ctl_q_ring rq;       /* receive queue */
        struct ice_ctl_q_ring sq;       /* send queue */
        u16 num_rq_entries;             /* receive queue depth */
        u16 num_sq_entries;             /* send queue depth */
        u16 rq_buf_size;                /* receive queue buffer size */
        u16 sq_buf_size;                /* send queue buffer size */
        enum libie_aq_err sq_last_status;       /* last status on send queue */
        struct mutex sq_lock;           /* Send queue lock */
        struct mutex rq_lock;           /* Receive queue lock */
};

#endif /* _ICE_CONTROLQ_H_ */