/*
 * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#ifndef __CXIO_WR_H__
#define __CXIO_WR_H__

#include <asm/io.h>
#include <linux/pci.h>
#include <linux/timer.h>
#include "firmware_exports.h"

#define T3_MAX_SGE      4
#define T3_MAX_INLINE   64
#define T3_STAG0_PBL_SIZE (2 * T3_MAX_SGE << 3)
#define T3_STAG0_MAX_PBE_LEN (128 * 1024 * 1024)
#define T3_STAG0_PAGE_SHIFT 15

#define Q_EMPTY(rptr,wptr) ((rptr)==(wptr))
#define Q_FULL(rptr,wptr,size_log2)  ( (((wptr)-(rptr))>>(size_log2)) && \
                                       ((rptr)!=(wptr)) )
#define Q_GENBIT(ptr,size_log2) (!(((ptr)>>size_log2)&0x1))
#define Q_FREECNT(rptr,wptr,size_log2) ((1UL<<size_log2)-((wptr)-(rptr)))
#define Q_COUNT(rptr,wptr) ((wptr)-(rptr))
#define Q_PTR2IDX(ptr,size_log2) (ptr & ((1UL<<size_log2)-1))

static inline void ring_doorbell(void __iomem *doorbell, u32 qpid)
{
        writel(((1<<31) | qpid), doorbell);
}

#define SEQ32_GE(x,y) (!( (((u32) (x)) - ((u32) (y))) & 0x80000000 ))

enum t3_wr_flags {
        T3_COMPLETION_FLAG = 0x01,
        T3_NOTIFY_FLAG = 0x02,
        T3_SOLICITED_EVENT_FLAG = 0x04,
        T3_READ_FENCE_FLAG = 0x08,
        T3_LOCAL_FENCE_FLAG = 0x10
} __attribute__ ((packed));

enum t3_wr_opcode {
        T3_WR_BP = FW_WROPCODE_RI_BYPASS,
        T3_WR_SEND = FW_WROPCODE_RI_SEND,
        T3_WR_WRITE = FW_WROPCODE_RI_RDMA_WRITE,
        T3_WR_READ = FW_WROPCODE_RI_RDMA_READ,
        T3_WR_INV_STAG = FW_WROPCODE_RI_LOCAL_INV,
        T3_WR_BIND = FW_WROPCODE_RI_BIND_MW,
        T3_WR_RCV = FW_WROPCODE_RI_RECEIVE,
        T3_WR_INIT = FW_WROPCODE_RI_RDMA_INIT,
        T3_WR_QP_MOD = FW_WROPCODE_RI_MODIFY_QP,
        T3_WR_FASTREG = FW_WROPCODE_RI_FASTREGISTER_MR
} __attribute__ ((packed));

enum t3_rdma_opcode {
        T3_RDMA_WRITE,          /* IETF RDMAP v1.0 ... */
        T3_READ_REQ,
        T3_READ_RESP,
        T3_SEND,
        T3_SEND_WITH_INV,
        T3_SEND_WITH_SE,
        T3_SEND_WITH_SE_INV,
        T3_TERMINATE,
        T3_RDMA_INIT,           /* CHELSIO RI specific ... */
        T3_BIND_MW,
        T3_FAST_REGISTER,
        T3_LOCAL_INV,
        T3_QP_MOD,
        T3_BYPASS,
        T3_RDMA_READ_REQ_WITH_INV,
} __attribute__ ((packed));

static inline enum t3_rdma_opcode wr2opcode(enum t3_wr_opcode wrop)
{
        switch (wrop) {
                case T3_WR_BP: return T3_BYPASS;
                case T3_WR_SEND: return T3_SEND;
                case T3_WR_WRITE: return T3_RDMA_WRITE;
                case T3_WR_READ: return T3_READ_REQ;
                case T3_WR_INV_STAG: return T3_LOCAL_INV;
                case T3_WR_BIND: return T3_BIND_MW;
                case T3_WR_INIT: return T3_RDMA_INIT;
                case T3_WR_QP_MOD: return T3_QP_MOD;
                case T3_WR_FASTREG: return T3_FAST_REGISTER;
                default: break;
        }
        return -1;
}


/* Work request id */
union t3_wrid {
        struct {
                u32 hi;
                u32 low;
        } id0;
        u64 id1;
};

#define WRID(wrid)              (wrid.id1)
#define WRID_GEN(wrid)          (wrid.id0.wr_gen)
#define WRID_IDX(wrid)          (wrid.id0.wr_idx)
#define WRID_LO(wrid)           (wrid.id0.wr_lo)

struct fw_riwrh {
        __be32 op_seop_flags;
        __be32 gen_tid_len;
};

#define S_FW_RIWR_OP            24
#define M_FW_RIWR_OP            0xff
#define V_FW_RIWR_OP(x)         ((x) << S_FW_RIWR_OP)
#define G_FW_RIWR_OP(x) ((((x) >> S_FW_RIWR_OP)) & M_FW_RIWR_OP)

#define S_FW_RIWR_SOPEOP        22
#define M_FW_RIWR_SOPEOP        0x3
#define V_FW_RIWR_SOPEOP(x)     ((x) << S_FW_RIWR_SOPEOP)

#define S_FW_RIWR_FLAGS         8
#define M_FW_RIWR_FLAGS         0x3fffff
#define V_FW_RIWR_FLAGS(x)      ((x) << S_FW_RIWR_FLAGS)
#define G_FW_RIWR_FLAGS(x)      ((((x) >> S_FW_RIWR_FLAGS)) & M_FW_RIWR_FLAGS)

#define S_FW_RIWR_TID           8
#define V_FW_RIWR_TID(x)        ((x) << S_FW_RIWR_TID)

#define S_FW_RIWR_LEN           0
#define V_FW_RIWR_LEN(x)        ((x) << S_FW_RIWR_LEN)

#define S_FW_RIWR_GEN           31
#define V_FW_RIWR_GEN(x)        ((x)  << S_FW_RIWR_GEN)

struct t3_sge {
        __be32 stag;
        __be32 len;
        __be64 to;
};

/* If num_sgle is zero, flit 5+ contains immediate data.*/
struct t3_send_wr {
        struct fw_riwrh wrh;    /* 0 */
        union t3_wrid wrid;     /* 1 */

        u8 rdmaop;              /* 2 */
        u8 reserved[3];
        __be32 rem_stag;
        __be32 plen;            /* 3 */
        __be32 num_sgle;
        struct t3_sge sgl[T3_MAX_SGE];  /* 4+ */
};

#define T3_MAX_FASTREG_DEPTH 10
#define T3_MAX_FASTREG_FRAG 10

struct t3_fastreg_wr {
        struct fw_riwrh wrh;    /* 0 */
        union t3_wrid wrid;     /* 1 */
        __be32 stag;            /* 2 */
        __be32 len;
        __be32 va_base_hi;      /* 3 */
        __be32 va_base_lo_fbo;
        __be32 page_type_perms; /* 4 */
        __be32 reserved1;
        __be64 pbl_addrs[0];    /* 5+ */
};

/*
 * If a fastreg wr spans multiple wqes, then the 2nd fragment look like this.
 */
struct t3_pbl_frag {
        struct fw_riwrh wrh;    /* 0 */
        __be64 pbl_addrs[14];   /* 1..14 */
};

#define S_FR_PAGE_COUNT         24
#define M_FR_PAGE_COUNT         0xff
#define V_FR_PAGE_COUNT(x)      ((x) << S_FR_PAGE_COUNT)
#define G_FR_PAGE_COUNT(x)      ((((x) >> S_FR_PAGE_COUNT)) & M_FR_PAGE_COUNT)

#define S_FR_PAGE_SIZE          16
#define M_FR_PAGE_SIZE          0x1f
#define V_FR_PAGE_SIZE(x)       ((x) << S_FR_PAGE_SIZE)
#define G_FR_PAGE_SIZE(x)       ((((x) >> S_FR_PAGE_SIZE)) & M_FR_PAGE_SIZE)

#define S_FR_TYPE               8
#define M_FR_TYPE               0x1
#define V_FR_TYPE(x)            ((x) << S_FR_TYPE)
#define G_FR_TYPE(x)            ((((x) >> S_FR_TYPE)) & M_FR_TYPE)

#define S_FR_PERMS              0
#define M_FR_PERMS              0xff
#define V_FR_PERMS(x)           ((x) << S_FR_PERMS)
#define G_FR_PERMS(x)           ((((x) >> S_FR_PERMS)) & M_FR_PERMS)

struct t3_local_inv_wr {
        struct fw_riwrh wrh;    /* 0 */
        union t3_wrid wrid;     /* 1 */
        __be32 stag;            /* 2 */
        __be32 reserved;
};

struct t3_rdma_write_wr {
        struct fw_riwrh wrh;    /* 0 */
        union t3_wrid wrid;     /* 1 */
        u8 rdmaop;              /* 2 */
        u8 reserved[3];
        __be32 stag_sink;
        __be64 to_sink;         /* 3 */
        __be32 plen;            /* 4 */
        __be32 num_sgle;
        struct t3_sge sgl[T3_MAX_SGE];  /* 5+ */
};

struct t3_rdma_read_wr {
        struct fw_riwrh wrh;    /* 0 */
        union t3_wrid wrid;     /* 1 */
        u8 rdmaop;              /* 2 */
        u8 local_inv;
        u8 reserved[2];
        __be32 rem_stag;
        __be64 rem_to;          /* 3 */
        __be32 local_stag;      /* 4 */
        __be32 local_len;
        __be64 local_to;        /* 5 */
};

struct t3_bind_mw_wr {
        struct fw_riwrh wrh;    /* 0 */
        union t3_wrid wrid;     /* 1 */
        u16 reserved;           /* 2 */
        u8 type;
        u8 perms;
        __be32 mr_stag;
        __be32 mw_stag;         /* 3 */
        __be32 mw_len;
        __be64 mw_va;           /* 4 */
        __be32 mr_pbl_addr;     /* 5 */
        u8 reserved2[3];
        u8 mr_pagesz;
};

struct t3_receive_wr {
        struct fw_riwrh wrh;    /* 0 */
        union t3_wrid wrid;     /* 1 */
        u8 pagesz[T3_MAX_SGE];
        __be32 num_sgle;                /* 2 */
        struct t3_sge sgl[T3_MAX_SGE];  /* 3+ */
        __be32 pbl_addr[T3_MAX_SGE];
};

struct t3_bypass_wr {
        struct fw_riwrh wrh;
        union t3_wrid wrid;     /* 1 */
};

struct t3_modify_qp_wr {
        struct fw_riwrh wrh;    /* 0 */
        union t3_wrid wrid;     /* 1 */
        __be32 flags;           /* 2 */
        __be32 quiesce;         /* 2 */
        __be32 max_ird;         /* 3 */
        __be32 max_ord;         /* 3 */
        __be64 sge_cmd;         /* 4 */
        __be64 ctx1;            /* 5 */
        __be64 ctx0;            /* 6 */
};

enum t3_modify_qp_flags {
        MODQP_QUIESCE  = 0x01,
        MODQP_MAX_IRD  = 0x02,
        MODQP_MAX_ORD  = 0x04,
        MODQP_WRITE_EC = 0x08,
        MODQP_READ_EC  = 0x10,
};


enum t3_mpa_attrs {
        uP_RI_MPA_RX_MARKER_ENABLE = 0x1,
        uP_RI_MPA_TX_MARKER_ENABLE = 0x2,
        uP_RI_MPA_CRC_ENABLE = 0x4,
        uP_RI_MPA_IETF_ENABLE = 0x8
} __attribute__ ((packed));

enum t3_qp_caps {
        uP_RI_QP_RDMA_READ_ENABLE = 0x01,
        uP_RI_QP_RDMA_WRITE_ENABLE = 0x02,
        uP_RI_QP_BIND_ENABLE = 0x04,
        uP_RI_QP_FAST_REGISTER_ENABLE = 0x08,
        uP_RI_QP_STAG0_ENABLE = 0x10
} __attribute__ ((packed));

enum rdma_init_rtr_types {
        RTR_READ = 1,
        RTR_WRITE = 2,
        RTR_SEND = 3,
};

#define S_RTR_TYPE      2
#define M_RTR_TYPE      0x3
#define V_RTR_TYPE(x)   ((x) << S_RTR_TYPE)
#define G_RTR_TYPE(x)   ((((x) >> S_RTR_TYPE)) & M_RTR_TYPE)

#define S_CHAN          4
#define M_CHAN          0x3
#define V_CHAN(x)       ((x) << S_CHAN)
#define G_CHAN(x)       ((((x) >> S_CHAN)) & M_CHAN)

struct t3_rdma_init_attr {
        u32 tid;
        u32 qpid;
        u32 pdid;
        u32 scqid;
        u32 rcqid;
        u32 rq_addr;
        u32 rq_size;
        enum t3_mpa_attrs mpaattrs;
        enum t3_qp_caps qpcaps;
        u16 tcp_emss;
        u32 ord;
        u32 ird;
        u64 qp_dma_addr;
        u32 qp_dma_size;
        enum rdma_init_rtr_types rtr_type;
        u16 flags;
        u16 rqe_count;
        u32 irs;
        u32 chan;
};

struct t3_rdma_init_wr {
        struct fw_riwrh wrh;    /* 0 */
        union t3_wrid wrid;     /* 1 */
        __be32 qpid;            /* 2 */
        __be32 pdid;
        __be32 scqid;           /* 3 */
        __be32 rcqid;
        __be32 rq_addr;         /* 4 */
        __be32 rq_size;
        u8 mpaattrs;            /* 5 */
        u8 qpcaps;
        __be16 ulpdu_size;
        __be16 flags_rtr_type;
        __be16 rqe_count;
        __be32 ord;             /* 6 */
        __be32 ird;
        __be64 qp_dma_addr;     /* 7 */
        __be32 qp_dma_size;     /* 8 */
        __be32 irs;
};

struct t3_genbit {
        u64 flit[15];
        __be64 genbit;
};

struct t3_wq_in_err {
        u64 flit[13];
        u64 err;
};

enum rdma_init_wr_flags {
        MPA_INITIATOR = (1<<0),
        PRIV_QP = (1<<1),
};

union t3_wr {
        struct t3_send_wr send;
        struct t3_rdma_write_wr write;
        struct t3_rdma_read_wr read;
        struct t3_receive_wr recv;
        struct t3_fastreg_wr fastreg;
        struct t3_pbl_frag pbl_frag;
        struct t3_local_inv_wr local_inv;
        struct t3_bind_mw_wr bind;
        struct t3_bypass_wr bypass;
        struct t3_rdma_init_wr init;
        struct t3_modify_qp_wr qp_mod;
        struct t3_genbit genbit;
        struct t3_wq_in_err wq_in_err;
        __be64 flit[16];
};

#define T3_SQ_CQE_FLIT    13
#define T3_SQ_COOKIE_FLIT 14

#define T3_RQ_COOKIE_FLIT 13
#define T3_RQ_CQE_FLIT    14

static inline enum t3_wr_opcode fw_riwrh_opcode(struct fw_riwrh *wqe)
{
        return G_FW_RIWR_OP(be32_to_cpu(wqe->op_seop_flags));
}

enum t3_wr_hdr_bits {
        T3_EOP = 1,
        T3_SOP = 2,
        T3_SOPEOP = T3_EOP|T3_SOP,
};

static inline void build_fw_riwrh(struct fw_riwrh *wqe, enum t3_wr_opcode op,
                                  enum t3_wr_flags flags, u8 genbit, u32 tid,
                                  u8 len, u8 sopeop)
{
        wqe->op_seop_flags = cpu_to_be32(V_FW_RIWR_OP(op) |
                                         V_FW_RIWR_SOPEOP(sopeop) |
                                         V_FW_RIWR_FLAGS(flags));
        wmb();
        wqe->gen_tid_len = cpu_to_be32(V_FW_RIWR_GEN(genbit) |
                                       V_FW_RIWR_TID(tid) |
                                       V_FW_RIWR_LEN(len));
        /* 2nd gen bit... */
        ((union t3_wr *)wqe)->genbit.genbit = cpu_to_be64(genbit);
}

/*
 * T3 ULP2_TX commands
 */
enum t3_utx_mem_op {
        T3_UTX_MEM_READ = 2,
        T3_UTX_MEM_WRITE = 3
};

/* T3 MC7 RDMA TPT entry format */

enum tpt_mem_type {
        TPT_NON_SHARED_MR = 0x0,
        TPT_SHARED_MR = 0x1,
        TPT_MW = 0x2,
        TPT_MW_RELAXED_PROTECTION = 0x3
};

enum tpt_addr_type {
        TPT_ZBTO = 0,
        TPT_VATO = 1
};

enum tpt_mem_perm {
        TPT_MW_BIND = 0x10,
        TPT_LOCAL_READ = 0x8,
        TPT_LOCAL_WRITE = 0x4,
        TPT_REMOTE_READ = 0x2,
        TPT_REMOTE_WRITE = 0x1
};

struct tpt_entry {
        __be32 valid_stag_pdid;
        __be32 flags_pagesize_qpid;

        __be32 rsvd_pbl_addr;
        __be32 len;
        __be32 va_hi;
        __be32 va_low_or_fbo;

        __be32 rsvd_bind_cnt_or_pstag;
        __be32 rsvd_pbl_size;
};

#define S_TPT_VALID             31
#define V_TPT_VALID(x)          ((x) << S_TPT_VALID)
#define F_TPT_VALID             V_TPT_VALID(1U)

#define S_TPT_STAG_KEY          23
#define M_TPT_STAG_KEY          0xFF
#define V_TPT_STAG_KEY(x)       ((x) << S_TPT_STAG_KEY)
#define G_TPT_STAG_KEY(x)       (((x) >> S_TPT_STAG_KEY) & M_TPT_STAG_KEY)

#define S_TPT_STAG_STATE        22
#define V_TPT_STAG_STATE(x)     ((x) << S_TPT_STAG_STATE)
#define F_TPT_STAG_STATE        V_TPT_STAG_STATE(1U)

#define S_TPT_STAG_TYPE         20
#define M_TPT_STAG_TYPE         0x3
#define V_TPT_STAG_TYPE(x)      ((x) << S_TPT_STAG_TYPE)
#define G_TPT_STAG_TYPE(x)      (((x) >> S_TPT_STAG_TYPE) & M_TPT_STAG_TYPE)

#define S_TPT_PDID              0
#define M_TPT_PDID              0xFFFFF
#define V_TPT_PDID(x)           ((x) << S_TPT_PDID)
#define G_TPT_PDID(x)           (((x) >> S_TPT_PDID) & M_TPT_PDID)

#define S_TPT_PERM              28
#define M_TPT_PERM              0xF
#define V_TPT_PERM(x)           ((x) << S_TPT_PERM)
#define G_TPT_PERM(x)           (((x) >> S_TPT_PERM) & M_TPT_PERM)

#define S_TPT_REM_INV_DIS       27
#define V_TPT_REM_INV_DIS(x)    ((x) << S_TPT_REM_INV_DIS)
#define F_TPT_REM_INV_DIS       V_TPT_REM_INV_DIS(1U)

#define S_TPT_ADDR_TYPE         26
#define V_TPT_ADDR_TYPE(x)      ((x) << S_TPT_ADDR_TYPE)
#define F_TPT_ADDR_TYPE         V_TPT_ADDR_TYPE(1U)

#define S_TPT_MW_BIND_ENABLE    25
#define V_TPT_MW_BIND_ENABLE(x) ((x) << S_TPT_MW_BIND_ENABLE)
#define F_TPT_MW_BIND_ENABLE    V_TPT_MW_BIND_ENABLE(1U)

#define S_TPT_PAGE_SIZE         20
#define M_TPT_PAGE_SIZE         0x1F
#define V_TPT_PAGE_SIZE(x)      ((x) << S_TPT_PAGE_SIZE)
#define G_TPT_PAGE_SIZE(x)      (((x) >> S_TPT_PAGE_SIZE) & M_TPT_PAGE_SIZE)

#define S_TPT_PBL_ADDR          0
#define M_TPT_PBL_ADDR          0x1FFFFFFF
#define V_TPT_PBL_ADDR(x)       ((x) << S_TPT_PBL_ADDR)
#define G_TPT_PBL_ADDR(x)       (((x) >> S_TPT_PBL_ADDR) & M_TPT_PBL_ADDR)

#define S_TPT_QPID              0
#define M_TPT_QPID              0xFFFFF
#define V_TPT_QPID(x)           ((x) << S_TPT_QPID)
#define G_TPT_QPID(x)           (((x) >> S_TPT_QPID) & M_TPT_QPID)

#define S_TPT_PSTAG             0
#define M_TPT_PSTAG             0xFFFFFF
#define V_TPT_PSTAG(x)          ((x) << S_TPT_PSTAG)
#define G_TPT_PSTAG(x)          (((x) >> S_TPT_PSTAG) & M_TPT_PSTAG)

#define S_TPT_PBL_SIZE          0
#define M_TPT_PBL_SIZE          0xFFFFF
#define V_TPT_PBL_SIZE(x)       ((x) << S_TPT_PBL_SIZE)
#define G_TPT_PBL_SIZE(x)       (((x) >> S_TPT_PBL_SIZE) & M_TPT_PBL_SIZE)

/*
 * CQE defs
 */
struct t3_cqe {
        __be32 header;
        __be32 len;
        union {
                struct {
                        __be32 stag;
                        __be32 msn;
                } rcqe;
                struct {
                        u32 wrid_hi;
                        u32 wrid_low;
                } scqe;
        } u;
};

#define S_CQE_OOO         31
#define M_CQE_OOO         0x1
#define G_CQE_OOO(x)      ((((x) >> S_CQE_OOO)) & M_CQE_OOO)
#define V_CEQ_OOO(x)      ((x)<<S_CQE_OOO)

#define S_CQE_QPID        12
#define M_CQE_QPID        0x7FFFF
#define G_CQE_QPID(x)     ((((x) >> S_CQE_QPID)) & M_CQE_QPID)
#define V_CQE_QPID(x)     ((x)<<S_CQE_QPID)

#define S_CQE_SWCQE       11
#define M_CQE_SWCQE       0x1
#define G_CQE_SWCQE(x)    ((((x) >> S_CQE_SWCQE)) & M_CQE_SWCQE)
#define V_CQE_SWCQE(x)    ((x)<<S_CQE_SWCQE)

#define S_CQE_GENBIT      10
#define M_CQE_GENBIT      0x1
#define G_CQE_GENBIT(x)   (((x) >> S_CQE_GENBIT) & M_CQE_GENBIT)
#define V_CQE_GENBIT(x)   ((x)<<S_CQE_GENBIT)

#define S_CQE_STATUS      5
#define M_CQE_STATUS      0x1F
#define G_CQE_STATUS(x)   ((((x) >> S_CQE_STATUS)) & M_CQE_STATUS)
#define V_CQE_STATUS(x)   ((x)<<S_CQE_STATUS)

#define S_CQE_TYPE        4
#define M_CQE_TYPE        0x1
#define G_CQE_TYPE(x)     ((((x) >> S_CQE_TYPE)) & M_CQE_TYPE)
#define V_CQE_TYPE(x)     ((x)<<S_CQE_TYPE)

#define S_CQE_OPCODE      0
#define M_CQE_OPCODE      0xF
#define G_CQE_OPCODE(x)   ((((x) >> S_CQE_OPCODE)) & M_CQE_OPCODE)
#define V_CQE_OPCODE(x)   ((x)<<S_CQE_OPCODE)

#define SW_CQE(x)         (G_CQE_SWCQE(be32_to_cpu((x).header)))
#define CQE_OOO(x)        (G_CQE_OOO(be32_to_cpu((x).header)))
#define CQE_QPID(x)       (G_CQE_QPID(be32_to_cpu((x).header)))
#define CQE_GENBIT(x)     (G_CQE_GENBIT(be32_to_cpu((x).header)))
#define CQE_TYPE(x)       (G_CQE_TYPE(be32_to_cpu((x).header)))
#define SQ_TYPE(x)        (CQE_TYPE((x)))
#define RQ_TYPE(x)        (!CQE_TYPE((x)))
#define CQE_STATUS(x)     (G_CQE_STATUS(be32_to_cpu((x).header)))
#define CQE_OPCODE(x)     (G_CQE_OPCODE(be32_to_cpu((x).header)))

#define CQE_SEND_OPCODE(x)( \
        (G_CQE_OPCODE(be32_to_cpu((x).header)) == T3_SEND) || \
        (G_CQE_OPCODE(be32_to_cpu((x).header)) == T3_SEND_WITH_SE) || \
        (G_CQE_OPCODE(be32_to_cpu((x).header)) == T3_SEND_WITH_INV) || \
        (G_CQE_OPCODE(be32_to_cpu((x).header)) == T3_SEND_WITH_SE_INV))

#define CQE_LEN(x)        (be32_to_cpu((x).len))

/* used for RQ completion processing */
#define CQE_WRID_STAG(x)  (be32_to_cpu((x).u.rcqe.stag))
#define CQE_WRID_MSN(x)   (be32_to_cpu((x).u.rcqe.msn))

/* used for SQ completion processing */
#define CQE_WRID_SQ_WPTR(x)     ((x).u.scqe.wrid_hi)
#define CQE_WRID_WPTR(x)        ((x).u.scqe.wrid_low)

/* generic accessor macros */
#define CQE_WRID_HI(x)          ((x).u.scqe.wrid_hi)
#define CQE_WRID_LOW(x)         ((x).u.scqe.wrid_low)

#define TPT_ERR_SUCCESS                     0x0
#define TPT_ERR_STAG                        0x1  /* STAG invalid: either the */
                                                 /* STAG is offlimt, being 0, */
                                                 /* or STAG_key mismatch */
#define TPT_ERR_PDID                        0x2  /* PDID mismatch */
#define TPT_ERR_QPID                        0x3  /* QPID mismatch */
#define TPT_ERR_ACCESS                      0x4  /* Invalid access right */
#define TPT_ERR_WRAP                        0x5  /* Wrap error */
#define TPT_ERR_BOUND                       0x6  /* base and bounds voilation */
#define TPT_ERR_INVALIDATE_SHARED_MR        0x7  /* attempt to invalidate a  */
                                                 /* shared memory region */
#define TPT_ERR_INVALIDATE_MR_WITH_MW_BOUND 0x8  /* attempt to invalidate a  */
                                                 /* shared memory region */
#define TPT_ERR_ECC                         0x9  /* ECC error detected */
#define TPT_ERR_ECC_PSTAG                   0xA  /* ECC error detected when  */
                                                 /* reading PSTAG for a MW  */
                                                 /* Invalidate */
#define TPT_ERR_PBL_ADDR_BOUND              0xB  /* pbl addr out of bounds:  */
                                                 /* software error */
#define TPT_ERR_SWFLUSH                     0xC  /* SW FLUSHED */
#define TPT_ERR_CRC                         0x10 /* CRC error */
#define TPT_ERR_MARKER                      0x11 /* Marker error */
#define TPT_ERR_PDU_LEN_ERR                 0x12 /* invalid PDU length */
#define TPT_ERR_OUT_OF_RQE                  0x13 /* out of RQE */
#define TPT_ERR_DDP_VERSION                 0x14 /* wrong DDP version */
#define TPT_ERR_RDMA_VERSION                0x15 /* wrong RDMA version */
#define TPT_ERR_OPCODE                      0x16 /* invalid rdma opcode */
#define TPT_ERR_DDP_QUEUE_NUM               0x17 /* invalid ddp queue number */
#define TPT_ERR_MSN                         0x18 /* MSN error */
#define TPT_ERR_TBIT                        0x19 /* tag bit not set correctly */
#define TPT_ERR_MO                          0x1A /* MO not 0 for TERMINATE  */
                                                 /* or READ_REQ */
#define TPT_ERR_MSN_GAP                     0x1B
#define TPT_ERR_MSN_RANGE                   0x1C
#define TPT_ERR_IRD_OVERFLOW                0x1D
#define TPT_ERR_RQE_ADDR_BOUND              0x1E /* RQE addr out of bounds:  */
                                                 /* software error */
#define TPT_ERR_INTERNAL_ERR                0x1F /* internal error (opcode  */
                                                 /* mismatch) */

struct t3_swsq {
        __u64                   wr_id;
        struct t3_cqe           cqe;
        __u32                   sq_wptr;
        __be32                  read_len;
        int                     opcode;
        int                     complete;
        int                     signaled;
};

struct t3_swrq {
        __u64                   wr_id;
        __u32                   pbl_addr;
};

/*
 * A T3 WQ implements both the SQ and RQ.
 */
struct t3_wq {
        union t3_wr *queue;             /* DMA accessible memory */
        dma_addr_t dma_addr;            /* DMA address for HW */
        DEFINE_DMA_UNMAP_ADDR(mapping); /* unmap kruft */
        u32 error;                      /* 1 once we go to ERROR */
        u32 qpid;
        u32 wptr;                       /* idx to next available WR slot */
        u32 size_log2;                  /* total wq size */
        struct t3_swsq *sq;             /* SW SQ */
        struct t3_swsq *oldest_read;    /* tracks oldest pending read */
        u32 sq_wptr;                    /* sq_wptr - sq_rptr == count of */
        u32 sq_rptr;                    /* pending wrs */
        u32 sq_size_log2;               /* sq size */
        struct t3_swrq *rq;             /* SW RQ (holds consumer wr_ids */
        u32 rq_wptr;                    /* rq_wptr - rq_rptr == count of */
        u32 rq_rptr;                    /* pending wrs */
        struct t3_swrq *rq_oldest_wr;   /* oldest wr on the SW RQ */
        u32 rq_size_log2;               /* rq size */
        u32 rq_addr;                    /* rq adapter address */
        void __iomem *doorbell;         /* kernel db */
        u64 udb;                        /* user db if any */
        struct cxio_rdev *rdev;
};

struct t3_cq {
        u32 cqid;
        u32 rptr;
        u32 wptr;
        u32 size_log2;
        dma_addr_t dma_addr;
        DEFINE_DMA_UNMAP_ADDR(mapping);
        struct t3_cqe *queue;
        struct t3_cqe *sw_queue;
        u32 sw_rptr;
        u32 sw_wptr;
};

#define CQ_VLD_ENTRY(ptr,size_log2,cqe) (Q_GENBIT(ptr,size_log2) == \
                                         CQE_GENBIT(*cqe))

struct t3_cq_status_page {
        u32 cq_err;
};

static inline int cxio_cq_in_error(struct t3_cq *cq)
{
        return ((struct t3_cq_status_page *)
                &cq->queue[1 << cq->size_log2])->cq_err;
}

static inline void cxio_set_cq_in_error(struct t3_cq *cq)
{
        ((struct t3_cq_status_page *)
         &cq->queue[1 << cq->size_log2])->cq_err = 1;
}

static inline void cxio_set_wq_in_error(struct t3_wq *wq)
{
        wq->queue->wq_in_err.err |= 1;
}

static inline void cxio_disable_wq_db(struct t3_wq *wq)
{
        wq->queue->wq_in_err.err |= 2;
}

static inline void cxio_enable_wq_db(struct t3_wq *wq)
{
        wq->queue->wq_in_err.err &= ~2;
}

static inline int cxio_wq_db_enabled(struct t3_wq *wq)
{
        return !(wq->queue->wq_in_err.err & 2);
}

static inline struct t3_cqe *cxio_next_hw_cqe(struct t3_cq *cq)
{
        struct t3_cqe *cqe;

        cqe = cq->queue + (Q_PTR2IDX(cq->rptr, cq->size_log2));
        if (CQ_VLD_ENTRY(cq->rptr, cq->size_log2, cqe))
                return cqe;
        return NULL;
}

static inline struct t3_cqe *cxio_next_sw_cqe(struct t3_cq *cq)
{
        struct t3_cqe *cqe;

        if (!Q_EMPTY(cq->sw_rptr, cq->sw_wptr)) {
                cqe = cq->sw_queue + (Q_PTR2IDX(cq->sw_rptr, cq->size_log2));
                return cqe;
        }
        return NULL;
}

static inline struct t3_cqe *cxio_next_cqe(struct t3_cq *cq)
{
        struct t3_cqe *cqe;

        if (!Q_EMPTY(cq->sw_rptr, cq->sw_wptr)) {
                cqe = cq->sw_queue + (Q_PTR2IDX(cq->sw_rptr, cq->size_log2));
                return cqe;
        }
        cqe = cq->queue + (Q_PTR2IDX(cq->rptr, cq->size_log2));
        if (CQ_VLD_ENTRY(cq->rptr, cq->size_log2, cqe))
                return cqe;
        return NULL;
}

#endif