xref: /freebsd-11-stable/sys/dev/cxgb/ulp/iw_cxgb/iw_cxgb_wr.h

/**************************************************************************

Copyright (c) 2007, 2008 Chelsio Inc.
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 1. Redistributions of source code must retain the above copyright notice,
    this list of conditions and the following disclaimer.

 2. Neither the name of the Chelsio Corporation nor the names of its
    contributors may be used to endorse or promote products derived from
    this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

$FreeBSD$

***************************************************************************/
#ifndef __CXIO_WR_H__
#define __CXIO_WR_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(doorbell, ((1<<31) | qpid));
}

#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
} __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
} __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;
		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+ */
};

struct t3_local_inv_wr {
	struct fw_riwrh wrh;	/* 0 */
	union t3_wrid wrid;	/* 1 */
	__be32 stag;		/* 2 */
	__be32 reserved3;
};

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 reserved[3];
	__be32 rem_stag;
	__be64 rem_to;		/* 3 */
	__be32 local_stag;	/* 4 */
	__be32 local_len;
	__be64 local_to;	/* 5 */
};

enum t3_addr_type {
	T3_VA_BASED_TO = 0x0,
	T3_ZERO_BASED_TO = 0x1
} __attribute__ ((packed));

enum t3_mem_perms {
	T3_MEM_ACCESS_LOCAL_READ = 0x1,
	T3_MEM_ACCESS_LOCAL_WRITE = 0x2,
	T3_MEM_ACCESS_REM_READ = 0x4,
	T3_MEM_ACCESS_REM_WRITE = 0x8
} __attribute__ ((packed));

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;
};

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_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;
	u64 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(be32toh(wqe->op_seop_flags));
}

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)
{
	wqe->op_seop_flags = htobe32(V_FW_RIWR_OP(op) |
					 V_FW_RIWR_SOPEOP(M_FW_RIWR_SOPEOP) |
					 V_FW_RIWR_FLAGS(flags));
	wmb();
	wqe->gen_tid_len = htobe32(V_FW_RIWR_GEN(genbit) |
				       V_FW_RIWR_TID(tid) |
				       V_FW_RIWR_LEN(len));
	/* 2nd gen bit... */
	((union t3_wr *)wqe)->genbit.genbit = htobe64(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_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(be32toh((x).header)))
#define CQE_OOO(x)        (G_CQE_OOO(be32toh((x).header)))
#define CQE_QPID(x)       (G_CQE_QPID(be32toh((x).header)))
#define CQE_GENBIT(x)     (G_CQE_GENBIT(be32toh((x).header)))
#define CQE_TYPE(x)       (G_CQE_TYPE(be32toh((x).header)))
#define SQ_TYPE(x)	  (CQE_TYPE((x)))
#define RQ_TYPE(x)	  (!CQE_TYPE((x)))
#define CQE_STATUS(x)     (G_CQE_STATUS(be32toh((x).header)))
#define CQE_OPCODE(x)     (G_CQE_OPCODE(be32toh((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)        (be32toh((x).len))

/* used for RQ completion processing */
#define CQE_WRID_STAG(x)  (be32toh((x).u.rcqe.stag))
#define CQE_WRID_MSN(x)   (be32toh((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 {
	uint64_t		wr_id;
	struct t3_cqe		cqe;
	uint32_t		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 */
	bus_addr_t dma_addr;		/* DMA address for HW */
	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 *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;
	bus_addr_t dma_addr;
	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->flit[13] = 1;
}

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