/*******************************************************************
 * This file is part of the Emulex RoCE Device Driver for          *
 * RoCE (RDMA over Converged Ethernet) adapters.                   *
 * Copyright (C) 2008-2012 Emulex. All rights reserved.            *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.emulex.com                                                  *
 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
 * modify it under the terms of version 2 of the GNU General       *
 * Public License as published by the Free Software Foundation.    *
 * This program is distributed in the hope that it will be useful. *
 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
 * more details, a copy of which can be found in the file COPYING  *
 * included with this package.                                     *
 *
 * Contact Information:
 * linux-drivers@emulex.com
 *
 * Emulex
 * 3333 Susan Street
 * Costa Mesa, CA 92626
 *******************************************************************/

#ifndef __OCRDMA_H__
#define __OCRDMA_H__

#include <linux/mutex.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/pci.h>

#include <rdma/ib_verbs.h>
#include <rdma/ib_user_verbs.h>

#include <be_roce.h>
#include "ocrdma_sli.h"

#define OCRDMA_ROCE_DEV_VERSION "1.0.0"
#define OCRDMA_NODE_DESC "Emulex OneConnect RoCE HCA"

#define ocrdma_err(format, arg...) printk(KERN_ERR format, ##arg)

#define OCRDMA_MAX_AH 512

#define OCRDMA_UVERBS(CMD_NAME) (1ull << IB_USER_VERBS_CMD_##CMD_NAME)

struct ocrdma_dev_attr {
        u8 fw_ver[32];
        u32 vendor_id;
        u32 device_id;
        u16 max_pd;
        u16 max_cq;
        u16 max_cqe;
        u16 max_qp;
        u16 max_wqe;
        u16 max_rqe;
        u32 max_inline_data;
        int max_send_sge;
        int max_recv_sge;
        int max_srq_sge;
        int max_mr;
        u64 max_mr_size;
        u32 max_num_mr_pbl;
        int max_fmr;
        int max_map_per_fmr;
        int max_pages_per_frmr;
        u16 max_ord_per_qp;
        u16 max_ird_per_qp;

        int device_cap_flags;
        u8 cq_overflow_detect;
        u8 srq_supported;

        u32 wqe_size;
        u32 rqe_size;
        u32 ird_page_size;
        u8 local_ca_ack_delay;
        u8 ird;
        u8 num_ird_pages;
};

struct ocrdma_pbl {
        void *va;
        dma_addr_t pa;
};

struct ocrdma_queue_info {
        void *va;
        dma_addr_t dma;
        u32 size;
        u16 len;
        u16 entry_size;         /* Size of an element in the queue */
        u16 id;                 /* qid, where to ring the doorbell. */
        u16 head, tail;
        bool created;
        atomic_t used;          /* Number of valid elements in the queue */
};

struct ocrdma_eq {
        struct ocrdma_queue_info q;
        u32 vector;
        int cq_cnt;
        struct ocrdma_dev *dev;
        char irq_name[32];
};

struct ocrdma_mq {
        struct ocrdma_queue_info sq;
        struct ocrdma_queue_info cq;
        bool rearm_cq;
};

struct mqe_ctx {
        struct mutex lock; /* for serializing mailbox commands on MQ */
        wait_queue_head_t cmd_wait;
        u32 tag;
        u16 cqe_status;
        u16 ext_status;
        bool cmd_done;
};

struct ocrdma_dev {
        struct ib_device ibdev;
        struct ocrdma_dev_attr attr;

        struct mutex dev_lock; /* provides syncronise access to device data */
        spinlock_t flush_q_lock ____cacheline_aligned;

        struct ocrdma_cq **cq_tbl;
        struct ocrdma_qp **qp_tbl;

        struct ocrdma_eq meq;
        struct ocrdma_eq *qp_eq_tbl;
        int eq_cnt;
        u16 base_eqid;
        u16 max_eq;

        union ib_gid *sgid_tbl;
        /* provided synchronization to sgid table for
         * updating gid entries triggered by notifier.
         */
        spinlock_t sgid_lock;

        int gsi_qp_created;
        struct ocrdma_cq *gsi_sqcq;
        struct ocrdma_cq *gsi_rqcq;

        struct {
                struct ocrdma_av *va;
                dma_addr_t pa;
                u32 size;
                u32 num_ah;
                /* provide synchronization for av
                 * entry allocations.
                 */
                spinlock_t lock;
                u32 ahid;
                struct ocrdma_pbl pbl;
        } av_tbl;

        void *mbx_cmd;
        struct ocrdma_mq mq;
        struct mqe_ctx mqe_ctx;

        struct be_dev_info nic_info;

        struct list_head entry;
        struct rcu_head rcu;
        int id;
};

struct ocrdma_cq {
        struct ib_cq ibcq;
        struct ocrdma_dev *dev;
        struct ocrdma_cqe *va;
        u32 phase;
        u32 getp;       /* pointer to pending wrs to
                         * return to stack, wrap arounds
                         * at max_hw_cqe
                         */
        u32 max_hw_cqe;
        bool phase_change;
        bool armed, solicited;
        bool arm_needed;

        spinlock_t cq_lock ____cacheline_aligned; /* provide synchronization
                                                   * to cq polling
                                                   */
        /* syncronizes cq completion handler invoked from multiple context */
        spinlock_t comp_handler_lock ____cacheline_aligned;
        u16 id;
        u16 eqn;

        struct ocrdma_ucontext *ucontext;
        dma_addr_t pa;
        u32 len;
        atomic_t use_cnt;

        /* head of all qp's sq and rq for which cqes need to be flushed
         * by the software.
         */
        struct list_head sq_head, rq_head;
};

struct ocrdma_pd {
        struct ib_pd ibpd;
        struct ocrdma_dev *dev;
        struct ocrdma_ucontext *uctx;
        atomic_t use_cnt;
        u32 id;
        int num_dpp_qp;
        u32 dpp_page;
        bool dpp_enabled;
};

struct ocrdma_ah {
        struct ib_ah ibah;
        struct ocrdma_dev *dev;
        struct ocrdma_av *av;
        u16 sgid_index;
        u32 id;
};

struct ocrdma_qp_hwq_info {
        u8 *va;                 /* virtual address */
        u32 max_sges;
        u32 head, tail;
        u32 entry_size;
        u32 max_cnt;
        u32 max_wqe_idx;
        u16 dbid;               /* qid, where to ring the doorbell. */
        u32 len;
        dma_addr_t pa;
};

struct ocrdma_srq {
        struct ib_srq ibsrq;
        struct ocrdma_dev *dev;
        u8 __iomem *db;
        /* provide synchronization to multiple context(s) posting rqe */
        spinlock_t q_lock ____cacheline_aligned;

        struct ocrdma_qp_hwq_info rq;
        struct ocrdma_pd *pd;
        atomic_t use_cnt;
        u32 id;
        u64 *rqe_wr_id_tbl;
        u32 *idx_bit_fields;
        u32 bit_fields_len;
};

struct ocrdma_qp {
        struct ib_qp ibqp;
        struct ocrdma_dev *dev;

        u8 __iomem *sq_db;
        /* provide synchronization to multiple context(s) posting wqe, rqe */
        spinlock_t q_lock ____cacheline_aligned;
        struct ocrdma_qp_hwq_info sq;
        struct {
                uint64_t wrid;
                uint16_t dpp_wqe_idx;
                uint16_t dpp_wqe;
                uint8_t  signaled;
                uint8_t  rsvd[3];
        } *wqe_wr_id_tbl;
        u32 max_inline_data;
        struct ocrdma_cq *sq_cq;
        /* list maintained per CQ to flush SQ errors */
        struct list_head sq_entry;

        u8 __iomem *rq_db;
        struct ocrdma_qp_hwq_info rq;
        u64 *rqe_wr_id_tbl;
        struct ocrdma_cq *rq_cq;
        struct ocrdma_srq *srq;
        /* list maintained per CQ to flush RQ errors */
        struct list_head rq_entry;

        enum ocrdma_qp_state state;     /*  QP state */
        int cap_flags;
        u32 max_ord, max_ird;

        u32 id;
        struct ocrdma_pd *pd;

        enum ib_qp_type qp_type;

        int sgid_idx;
        u32 qkey;
        bool dpp_enabled;
        u8 *ird_q_va;
};

#define OCRDMA_GET_NUM_POSTED_SHIFT_VAL(qp) \
        (((qp->dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) && \
                (qp->id < 64)) ? 24 : 16)

struct ocrdma_hw_mr {
        struct ocrdma_dev *dev;
        u32 lkey;
        u8 fr_mr;
        u8 remote_atomic;
        u8 remote_rd;
        u8 remote_wr;
        u8 local_rd;
        u8 local_wr;
        u8 mw_bind;
        u8 rsvd;
        u64 len;
        struct ocrdma_pbl *pbl_table;
        u32 num_pbls;
        u32 num_pbes;
        u32 pbl_size;
        u32 pbe_size;
        u64 fbo;
        u64 va;
};

struct ocrdma_mr {
        struct ib_mr ibmr;
        struct ib_umem *umem;
        struct ocrdma_hw_mr hwmr;
        struct ocrdma_pd *pd;
};

struct ocrdma_ucontext {
        struct ib_ucontext ibucontext;
        struct ocrdma_dev *dev;

        struct list_head mm_head;
        struct mutex mm_list_lock; /* protects list entries of mm type */
        struct {
                u32 *va;
                dma_addr_t pa;
                u32 len;
        } ah_tbl;
};

struct ocrdma_mm {
        struct {
                u64 phy_addr;
                unsigned long len;
        } key;
        struct list_head entry;
};

static inline struct ocrdma_dev *get_ocrdma_dev(struct ib_device *ibdev)
{
        return container_of(ibdev, struct ocrdma_dev, ibdev);
}

static inline struct ocrdma_ucontext *get_ocrdma_ucontext(struct ib_ucontext
                                                          *ibucontext)
{
        return container_of(ibucontext, struct ocrdma_ucontext, ibucontext);
}

static inline struct ocrdma_pd *get_ocrdma_pd(struct ib_pd *ibpd)
{
        return container_of(ibpd, struct ocrdma_pd, ibpd);
}

static inline struct ocrdma_cq *get_ocrdma_cq(struct ib_cq *ibcq)
{
        return container_of(ibcq, struct ocrdma_cq, ibcq);
}

static inline struct ocrdma_qp *get_ocrdma_qp(struct ib_qp *ibqp)
{
        return container_of(ibqp, struct ocrdma_qp, ibqp);
}

static inline struct ocrdma_mr *get_ocrdma_mr(struct ib_mr *ibmr)
{
        return container_of(ibmr, struct ocrdma_mr, ibmr);
}

static inline struct ocrdma_ah *get_ocrdma_ah(struct ib_ah *ibah)
{
        return container_of(ibah, struct ocrdma_ah, ibah);
}

static inline struct ocrdma_srq *get_ocrdma_srq(struct ib_srq *ibsrq)
{
        return container_of(ibsrq, struct ocrdma_srq, ibsrq);
}

#endif