drivers/infiniband/hw/cxgb4/t4.h - kernel/msm-4.9 - Gitiles

 /*
  * Copyright (c) 2009-2010 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 __T4_H__
 #define __T4_H__

 #include "t4_hw.h"
 #include "t4_regs.h"
 #include "t4_msg.h"
 #include "t4fw_ri_api.h"

 #define T4_MAX_NUM_PD 65536
 #define T4_MAX_MR_SIZE (~0ULL)
 #define T4_PAGESIZE_MASK 0xffff000  /* 4KB-128MB */
 #define T4_STAG_UNSET 0xffffffff
 #define T4_FW_MAJ 0
 #define PCIE_MA_SYNC_A 0x30b4

 struct t4_status_page {
 	__be32 rsvd1;	/* flit 0 - hw owns */
 	__be16 rsvd2;
 	__be16 qid;
 	__be16 cidx;
 	__be16 pidx;
 	u8 qp_err;	/* flit 1 - sw owns */
 	u8 db_off;
 	u8 pad;
 	u16 host_wq_pidx;
 	u16 host_cidx;
 	u16 host_pidx;
 };

 #define T4_EQ_ENTRY_SIZE 64

 #define T4_SQ_NUM_SLOTS 5
 #define T4_SQ_NUM_BYTES (T4_EQ_ENTRY_SIZE * T4_SQ_NUM_SLOTS)
 #define T4_MAX_SEND_SGE ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_send_wr) - \
 			sizeof(struct fw_ri_isgl)) / sizeof(struct fw_ri_sge))
 #define T4_MAX_SEND_INLINE ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_send_wr) - \
 			sizeof(struct fw_ri_immd)))
 #define T4_MAX_WRITE_INLINE ((T4_SQ_NUM_BYTES - \
 			sizeof(struct fw_ri_rdma_write_wr) - \
 			sizeof(struct fw_ri_immd)))
 #define T4_MAX_WRITE_SGE ((T4_SQ_NUM_BYTES - \
 			sizeof(struct fw_ri_rdma_write_wr) - \
 			sizeof(struct fw_ri_isgl)) / sizeof(struct fw_ri_sge))
 #define T4_MAX_FR_IMMD ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_fr_nsmr_wr) - \
 			sizeof(struct fw_ri_immd)) & ~31UL)
 #define T4_MAX_FR_IMMD_DEPTH (T4_MAX_FR_IMMD / sizeof(u64))
 #define T4_MAX_FR_DSGL 1024
 #define T4_MAX_FR_DSGL_DEPTH (T4_MAX_FR_DSGL / sizeof(u64))

 static inline int t4_max_fr_depth(int use_dsgl)
 {
 	return use_dsgl ? T4_MAX_FR_DSGL_DEPTH : T4_MAX_FR_IMMD_DEPTH;
 }

 #define T4_RQ_NUM_SLOTS 2
 #define T4_RQ_NUM_BYTES (T4_EQ_ENTRY_SIZE * T4_RQ_NUM_SLOTS)
 #define T4_MAX_RECV_SGE 4

 union t4_wr {
 	struct fw_ri_res_wr res;
 	struct fw_ri_wr ri;
 	struct fw_ri_rdma_write_wr write;
 	struct fw_ri_send_wr send;
 	struct fw_ri_rdma_read_wr read;
 	struct fw_ri_bind_mw_wr bind;
 	struct fw_ri_fr_nsmr_wr fr;
 	struct fw_ri_inv_lstag_wr inv;
 	struct t4_status_page status;
 	__be64 flits[T4_EQ_ENTRY_SIZE / sizeof(__be64) * T4_SQ_NUM_SLOTS];
 };

 union t4_recv_wr {
 	struct fw_ri_recv_wr recv;
 	struct t4_status_page status;
 	__be64 flits[T4_EQ_ENTRY_SIZE / sizeof(__be64) * T4_RQ_NUM_SLOTS];
 };

 static inline void init_wr_hdr(union t4_wr *wqe, u16 wrid,
 			       enum fw_wr_opcodes opcode, u8 flags, u8 len16)
 {
 	wqe->send.opcode = (u8)opcode;
 	wqe->send.flags = flags;
 	wqe->send.wrid = wrid;
 	wqe->send.r1[0] = 0;
 	wqe->send.r1[1] = 0;
 	wqe->send.r1[2] = 0;
 	wqe->send.len16 = len16;
 }

 /* CQE/AE status codes */
 #define T4_ERR_SUCCESS                     0x0
 #define T4_ERR_STAG                        0x1	/* STAG invalid: either the */
 						/* STAG is offlimt, being 0, */
 						/* or STAG_key mismatch */
 #define T4_ERR_PDID                        0x2	/* PDID mismatch */
 #define T4_ERR_QPID                        0x3	/* QPID mismatch */
 #define T4_ERR_ACCESS                      0x4	/* Invalid access right */
 #define T4_ERR_WRAP                        0x5	/* Wrap error */
 #define T4_ERR_BOUND                       0x6	/* base and bounds voilation */
 #define T4_ERR_INVALIDATE_SHARED_MR        0x7	/* attempt to invalidate a  */
 						/* shared memory region */
 #define T4_ERR_INVALIDATE_MR_WITH_MW_BOUND 0x8	/* attempt to invalidate a  */
 						/* shared memory region */
 #define T4_ERR_ECC                         0x9	/* ECC error detected */
 #define T4_ERR_ECC_PSTAG                   0xA	/* ECC error detected when  */
 						/* reading PSTAG for a MW  */
 						/* Invalidate */
 #define T4_ERR_PBL_ADDR_BOUND              0xB	/* pbl addr out of bounds:  */
 						/* software error */
 #define T4_ERR_SWFLUSH			   0xC	/* SW FLUSHED */
 #define T4_ERR_CRC                         0x10 /* CRC error */
 #define T4_ERR_MARKER                      0x11 /* Marker error */
 #define T4_ERR_PDU_LEN_ERR                 0x12 /* invalid PDU length */
 #define T4_ERR_OUT_OF_RQE                  0x13 /* out of RQE */
 #define T4_ERR_DDP_VERSION                 0x14 /* wrong DDP version */
 #define T4_ERR_RDMA_VERSION                0x15 /* wrong RDMA version */
 #define T4_ERR_OPCODE                      0x16 /* invalid rdma opcode */
 #define T4_ERR_DDP_QUEUE_NUM               0x17 /* invalid ddp queue number */
 #define T4_ERR_MSN                         0x18 /* MSN error */
 #define T4_ERR_TBIT                        0x19 /* tag bit not set correctly */
 #define T4_ERR_MO                          0x1A /* MO not 0 for TERMINATE  */
 						/* or READ_REQ */
 #define T4_ERR_MSN_GAP                     0x1B
 #define T4_ERR_MSN_RANGE                   0x1C
 #define T4_ERR_IRD_OVERFLOW                0x1D
 #define T4_ERR_RQE_ADDR_BOUND              0x1E /* RQE addr out of bounds:  */
 						/* software error */
 #define T4_ERR_INTERNAL_ERR                0x1F /* internal error (opcode  */
 						/* mismatch) */
 /*
  * CQE defs
  */
 struct t4_cqe {
 	__be32 header;
 	__be32 len;
 	union {
 		struct {
 			__be32 stag;
 			__be32 msn;
 		} rcqe;
 		struct {
 			u32 nada1;
 			u16 nada2;
 			u16 cidx;
 		} scqe;
 		struct {
 			__be32 wrid_hi;
 			__be32 wrid_low;
 		} gen;
 	} u;
 	__be64 reserved;
 	__be64 bits_type_ts;
 };

 /* macros for flit 0 of the cqe */

 #define CQE_QPID_S        12
 #define CQE_QPID_M        0xFFFFF
 #define CQE_QPID_G(x)     ((((x) >> CQE_QPID_S)) & CQE_QPID_M)
 #define CQE_QPID_V(x)	  ((x)<<CQE_QPID_S)

 #define CQE_SWCQE_S       11
 #define CQE_SWCQE_M       0x1
 #define CQE_SWCQE_G(x)    ((((x) >> CQE_SWCQE_S)) & CQE_SWCQE_M)
 #define CQE_SWCQE_V(x)	  ((x)<<CQE_SWCQE_S)

 #define CQE_STATUS_S      5
 #define CQE_STATUS_M      0x1F
 #define CQE_STATUS_G(x)   ((((x) >> CQE_STATUS_S)) & CQE_STATUS_M)
 #define CQE_STATUS_V(x)   ((x)<<CQE_STATUS_S)

 #define CQE_TYPE_S        4
 #define CQE_TYPE_M        0x1
 #define CQE_TYPE_G(x)     ((((x) >> CQE_TYPE_S)) & CQE_TYPE_M)
 #define CQE_TYPE_V(x)     ((x)<<CQE_TYPE_S)

 #define CQE_OPCODE_S      0
 #define CQE_OPCODE_M      0xF
 #define CQE_OPCODE_G(x)   ((((x) >> CQE_OPCODE_S)) & CQE_OPCODE_M)
 #define CQE_OPCODE_V(x)   ((x)<<CQE_OPCODE_S)

 #define SW_CQE(x)         (CQE_SWCQE_G(be32_to_cpu((x)->header)))
 #define CQE_QPID(x)       (CQE_QPID_G(be32_to_cpu((x)->header)))
 #define CQE_TYPE(x)       (CQE_TYPE_G(be32_to_cpu((x)->header)))
 #define SQ_TYPE(x)	  (CQE_TYPE((x)))
 #define RQ_TYPE(x)	  (!CQE_TYPE((x)))
 #define CQE_STATUS(x)     (CQE_STATUS_G(be32_to_cpu((x)->header)))
 #define CQE_OPCODE(x)     (CQE_OPCODE_G(be32_to_cpu((x)->header)))

 #define CQE_SEND_OPCODE(x)( \
 	(CQE_OPCODE_G(be32_to_cpu((x)->header)) == FW_RI_SEND) || \
 	(CQE_OPCODE_G(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_SE) || \
 	(CQE_OPCODE_G(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_INV) || \
 	(CQE_OPCODE_G(be32_to_cpu((x)->header)) == FW_RI_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_IDX(x)	((x)->u.scqe.cidx)

 /* generic accessor macros */
 #define CQE_WRID_HI(x)		(be32_to_cpu((x)->u.gen.wrid_hi))
 #define CQE_WRID_LOW(x)		(be32_to_cpu((x)->u.gen.wrid_low))

 /* macros for flit 3 of the cqe */
 #define CQE_GENBIT_S	63
 #define CQE_GENBIT_M	0x1
 #define CQE_GENBIT_G(x)	(((x) >> CQE_GENBIT_S) & CQE_GENBIT_M)
 #define CQE_GENBIT_V(x) ((x)<<CQE_GENBIT_S)

 #define CQE_OVFBIT_S	62
 #define CQE_OVFBIT_M	0x1
 #define CQE_OVFBIT_G(x)	((((x) >> CQE_OVFBIT_S)) & CQE_OVFBIT_M)

 #define CQE_IQTYPE_S	60
 #define CQE_IQTYPE_M	0x3
 #define CQE_IQTYPE_G(x)	((((x) >> CQE_IQTYPE_S)) & CQE_IQTYPE_M)

 #define CQE_TS_M	0x0fffffffffffffffULL
 #define CQE_TS_G(x)	((x) & CQE_TS_M)

 #define CQE_OVFBIT(x)	((unsigned)CQE_OVFBIT_G(be64_to_cpu((x)->bits_type_ts)))
 #define CQE_GENBIT(x)	((unsigned)CQE_GENBIT_G(be64_to_cpu((x)->bits_type_ts)))
 #define CQE_TS(x)	(CQE_TS_G(be64_to_cpu((x)->bits_type_ts)))

 struct t4_swsqe {
 	u64			wr_id;
 	struct t4_cqe		cqe;
 	int			read_len;
 	int			opcode;
 	int			complete;
 	int			signaled;
 	u16			idx;
 	int                     flushed;
 	struct timespec         host_ts;
 	u64                     sge_ts;
 };

 static inline pgprot_t t4_pgprot_wc(pgprot_t prot)
 {
 #if defined(__i386__) || defined(__x86_64__) || defined(CONFIG_PPC64)
 	return pgprot_writecombine(prot);
 #else
 	return pgprot_noncached(prot);
 #endif
 }

 enum {
 	T4_SQ_ONCHIP = (1<<0),
 };

 struct t4_sq {
 	union t4_wr *queue;
 	dma_addr_t dma_addr;
 	DEFINE_DMA_UNMAP_ADDR(mapping);
 	unsigned long phys_addr;
 	struct t4_swsqe *sw_sq;
 	struct t4_swsqe *oldest_read;
 	u64 __iomem *udb;
 	size_t memsize;
 	u32 qid;
 	u16 in_use;
 	u16 size;
 	u16 cidx;
 	u16 pidx;
 	u16 wq_pidx;
 	u16 wq_pidx_inc;
 	u16 flags;
 	short flush_cidx;
 };

 struct t4_swrqe {
 	u64 wr_id;
 	struct timespec host_ts;
 	u64 sge_ts;
 };

 struct t4_rq {
 	union  t4_recv_wr *queue;
 	dma_addr_t dma_addr;
 	DEFINE_DMA_UNMAP_ADDR(mapping);
 	struct t4_swrqe *sw_rq;
 	u64 __iomem *udb;
 	size_t memsize;
 	u32 qid;
 	u32 msn;
 	u32 rqt_hwaddr;
 	u16 rqt_size;
 	u16 in_use;
 	u16 size;
 	u16 cidx;
 	u16 pidx;
 	u16 wq_pidx;
 	u16 wq_pidx_inc;
 };

 struct t4_wq {
 	struct t4_sq sq;
 	struct t4_rq rq;
 	void __iomem *db;
 	void __iomem *gts;
 	struct c4iw_rdev *rdev;
 	int flushed;
 };

 static inline int t4_rqes_posted(struct t4_wq *wq)
 {
 	return wq->rq.in_use;
 }

 static inline int t4_rq_empty(struct t4_wq *wq)
 {
 	return wq->rq.in_use == 0;
 }

 static inline int t4_rq_full(struct t4_wq *wq)
 {
 	return wq->rq.in_use == (wq->rq.size - 1);
 }

 static inline u32 t4_rq_avail(struct t4_wq *wq)
 {
 	return wq->rq.size - 1 - wq->rq.in_use;
 }

 static inline void t4_rq_produce(struct t4_wq *wq, u8 len16)
 {
 	wq->rq.in_use++;
 	if (++wq->rq.pidx == wq->rq.size)
 		wq->rq.pidx = 0;
 	wq->rq.wq_pidx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE);
 	if (wq->rq.wq_pidx >= wq->rq.size * T4_RQ_NUM_SLOTS)
 		wq->rq.wq_pidx %= wq->rq.size * T4_RQ_NUM_SLOTS;
 }

 static inline void t4_rq_consume(struct t4_wq *wq)
 {
 	wq->rq.in_use--;
 	wq->rq.msn++;
 	if (++wq->rq.cidx == wq->rq.size)
 		wq->rq.cidx = 0;
 }

 static inline u16 t4_rq_host_wq_pidx(struct t4_wq *wq)
 {
 	return wq->rq.queue[wq->rq.size].status.host_wq_pidx;
 }

 static inline u16 t4_rq_wq_size(struct t4_wq *wq)
 {
 		return wq->rq.size * T4_RQ_NUM_SLOTS;
 }

 static inline int t4_sq_onchip(struct t4_sq *sq)
 {
 	return sq->flags & T4_SQ_ONCHIP;
 }

 static inline int t4_sq_empty(struct t4_wq *wq)
 {
 	return wq->sq.in_use == 0;
 }

 static inline int t4_sq_full(struct t4_wq *wq)
 {
 	return wq->sq.in_use == (wq->sq.size - 1);
 }

 static inline u32 t4_sq_avail(struct t4_wq *wq)
 {
 	return wq->sq.size - 1 - wq->sq.in_use;
 }

 static inline void t4_sq_produce(struct t4_wq *wq, u8 len16)
 {
 	wq->sq.in_use++;
 	if (++wq->sq.pidx == wq->sq.size)
 		wq->sq.pidx = 0;
 	wq->sq.wq_pidx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE);
 	if (wq->sq.wq_pidx >= wq->sq.size * T4_SQ_NUM_SLOTS)
 		wq->sq.wq_pidx %= wq->sq.size * T4_SQ_NUM_SLOTS;
 }

 static inline void t4_sq_consume(struct t4_wq *wq)
 {
 	BUG_ON(wq->sq.in_use < 1);
 	if (wq->sq.cidx == wq->sq.flush_cidx)
 		wq->sq.flush_cidx = -1;
 	wq->sq.in_use--;
 	if (++wq->sq.cidx == wq->sq.size)
 		wq->sq.cidx = 0;
 }

 static inline u16 t4_sq_host_wq_pidx(struct t4_wq *wq)
 {
 	return wq->sq.queue[wq->sq.size].status.host_wq_pidx;
 }

 static inline u16 t4_sq_wq_size(struct t4_wq *wq)
 {
 		return wq->sq.size * T4_SQ_NUM_SLOTS;
 }

 /* This function copies 64 byte coalesced work request to memory
  * mapped BAR2 space. For coalesced WRs, the SGE fetches data
  * from the FIFO instead of from Host.
  */
 static inline void pio_copy(u64 __iomem *dst, u64 *src)
 {
 	int count = 8;

 	while (count) {
 		writeq(*src, dst);
 		src++;
 		dst++;
 		count--;
 	}
 }

 static inline void t4_ring_sq_db(struct t4_wq *wq, u16 inc, u8 t5,
 				 union t4_wr *wqe)
 {

 	/* Flush host queue memory writes. */
 	wmb();
 	if (t5) {
 		if (inc == 1 && wqe) {
 			PDBG("%s: WC wq->sq.pidx = %d\n",
 			     __func__, wq->sq.pidx);
 			pio_copy(wq->sq.udb + 7, (void *)wqe);
 		} else {
 			PDBG("%s: DB wq->sq.pidx = %d\n",
 			     __func__, wq->sq.pidx);
 			writel(PIDX_T5_V(inc), wq->sq.udb);
 		}

 		/* Flush user doorbell area writes. */
 		wmb();
 		return;
 	}
 	writel(QID_V(wq->sq.qid) | PIDX_V(inc), wq->db);
 }

 static inline void t4_ring_rq_db(struct t4_wq *wq, u16 inc, u8 t5,
 				 union t4_recv_wr *wqe)
 {

 	/* Flush host queue memory writes. */
 	wmb();
 	if (t5) {
 		if (inc == 1 && wqe) {
 			PDBG("%s: WC wq->rq.pidx = %d\n",
 			     __func__, wq->rq.pidx);
 			pio_copy(wq->rq.udb + 7, (void *)wqe);
 		} else {
 			PDBG("%s: DB wq->rq.pidx = %d\n",
 			     __func__, wq->rq.pidx);
 			writel(PIDX_T5_V(inc), wq->rq.udb);
 		}

 		/* Flush user doorbell area writes. */
 		wmb();
 		return;
 	}
 	writel(QID_V(wq->rq.qid) | PIDX_V(inc), wq->db);
 }

 static inline int t4_wq_in_error(struct t4_wq *wq)
 {
 	return wq->rq.queue[wq->rq.size].status.qp_err;
 }

 static inline void t4_set_wq_in_error(struct t4_wq *wq)
 {
 	wq->rq.queue[wq->rq.size].status.qp_err = 1;
 }

 static inline void t4_disable_wq_db(struct t4_wq *wq)
 {
 	wq->rq.queue[wq->rq.size].status.db_off = 1;
 }

 static inline void t4_enable_wq_db(struct t4_wq *wq)
 {
 	wq->rq.queue[wq->rq.size].status.db_off = 0;
 }

 static inline int t4_wq_db_enabled(struct t4_wq *wq)
 {
 	return !wq->rq.queue[wq->rq.size].status.db_off;
 }

 enum t4_cq_flags {
 	CQ_ARMED	= 1,
 };

 struct t4_cq {
 	struct t4_cqe *queue;
 	dma_addr_t dma_addr;
 	DEFINE_DMA_UNMAP_ADDR(mapping);
 	struct t4_cqe *sw_queue;
 	void __iomem *gts;
 	struct c4iw_rdev *rdev;
 	u64 ugts;
 	size_t memsize;
 	__be64 bits_type_ts;
 	u32 cqid;
 	u32 qid_mask;
 	int vector;
 	u16 size; /* including status page */
 	u16 cidx;
 	u16 sw_pidx;
 	u16 sw_cidx;
 	u16 sw_in_use;
 	u16 cidx_inc;
 	u8 gen;
 	u8 error;
 	unsigned long flags;
 };

 static inline int t4_clear_cq_armed(struct t4_cq *cq)
 {
 	return test_and_clear_bit(CQ_ARMED, &cq->flags);
 }

 static inline int t4_arm_cq(struct t4_cq *cq, int se)
 {
 	u32 val;

 	set_bit(CQ_ARMED, &cq->flags);
 	while (cq->cidx_inc > CIDXINC_M) {
 		val = SEINTARM_V(0) | CIDXINC_V(CIDXINC_M) | TIMERREG_V(7) |
 		      INGRESSQID_V(cq->cqid & cq->qid_mask);
 		writel(val, cq->gts);
 		cq->cidx_inc -= CIDXINC_M;
 	}
 	val = SEINTARM_V(se) | CIDXINC_V(cq->cidx_inc) | TIMERREG_V(6) |
 	      INGRESSQID_V(cq->cqid & cq->qid_mask);
 	writel(val, cq->gts);
 	cq->cidx_inc = 0;
 	return 0;
 }

 static inline void t4_swcq_produce(struct t4_cq *cq)
 {
 	cq->sw_in_use++;
 	if (cq->sw_in_use == cq->size) {
 		PDBG("%s cxgb4 sw cq overflow cqid %u\n", __func__, cq->cqid);
 		cq->error = 1;
 		BUG_ON(1);
 	}
 	if (++cq->sw_pidx == cq->size)
 		cq->sw_pidx = 0;
 }

 static inline void t4_swcq_consume(struct t4_cq *cq)
 {
 	BUG_ON(cq->sw_in_use < 1);
 	cq->sw_in_use--;
 	if (++cq->sw_cidx == cq->size)
 		cq->sw_cidx = 0;
 }

 static inline void t4_hwcq_consume(struct t4_cq *cq)
 {
 	cq->bits_type_ts = cq->queue[cq->cidx].bits_type_ts;
 	if (++cq->cidx_inc == (cq->size >> 4) || cq->cidx_inc == CIDXINC_M) {
 		u32 val;

 		val = SEINTARM_V(0) | CIDXINC_V(cq->cidx_inc) | TIMERREG_V(7) |
 		      INGRESSQID_V(cq->cqid & cq->qid_mask);
 		writel(val, cq->gts);
 		cq->cidx_inc = 0;
 	}
 	if (++cq->cidx == cq->size) {
 		cq->cidx = 0;
 		cq->gen ^= 1;
 	}
 }

 static inline int t4_valid_cqe(struct t4_cq *cq, struct t4_cqe *cqe)
 {
 	return (CQE_GENBIT(cqe) == cq->gen);
 }

 static inline int t4_next_hw_cqe(struct t4_cq *cq, struct t4_cqe **cqe)
 {
 	int ret;
 	u16 prev_cidx;

 	if (cq->cidx == 0)
 		prev_cidx = cq->size - 1;
 	else
 		prev_cidx = cq->cidx - 1;

 	if (cq->queue[prev_cidx].bits_type_ts != cq->bits_type_ts) {
 		ret = -EOVERFLOW;
 		cq->error = 1;
 		printk(KERN_ERR MOD "cq overflow cqid %u\n", cq->cqid);
 		BUG_ON(1);
 	} else if (t4_valid_cqe(cq, &cq->queue[cq->cidx])) {

 		/* Ensure CQE is flushed to memory */
 		rmb();
 		*cqe = &cq->queue[cq->cidx];
 		ret = 0;
 	} else
 		ret = -ENODATA;
 	return ret;
 }

 static inline struct t4_cqe *t4_next_sw_cqe(struct t4_cq *cq)
 {
 	if (cq->sw_in_use == cq->size) {
 		PDBG("%s cxgb4 sw cq overflow cqid %u\n", __func__, cq->cqid);
 		cq->error = 1;
 		BUG_ON(1);
 		return NULL;
 	}
 	if (cq->sw_in_use)
 		return &cq->sw_queue[cq->sw_cidx];
 	return NULL;
 }

 static inline int t4_next_cqe(struct t4_cq *cq, struct t4_cqe **cqe)
 {
 	int ret = 0;

 	if (cq->error)
 		ret = -ENODATA;
 	else if (cq->sw_in_use)
 		*cqe = &cq->sw_queue[cq->sw_cidx];
 	else
 		ret = t4_next_hw_cqe(cq, cqe);
 	return ret;
 }

 static inline int t4_cq_in_error(struct t4_cq *cq)
 {
 	return ((struct t4_status_page *)&cq->queue[cq->size])->qp_err;
 }

 static inline void t4_set_cq_in_error(struct t4_cq *cq)
 {
 	((struct t4_status_page *)&cq->queue[cq->size])->qp_err = 1;
 }
 #endif

 struct t4_dev_status_page {
 	u8 db_off;
 };
	/*
	* Copyright (c) 2009-2010 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 __T4_H__
	#define __T4_H__

	#include "t4_hw.h"
	#include "t4_regs.h"
	#include "t4_msg.h"
	#include "t4fw_ri_api.h"

	#define T4_MAX_NUM_PD 65536
	#define T4_MAX_MR_SIZE (~0ULL)
	#define T4_PAGESIZE_MASK 0xffff000 /* 4KB-128MB */
	#define T4_STAG_UNSET 0xffffffff
	#define T4_FW_MAJ 0
	#define PCIE_MA_SYNC_A 0x30b4

	struct t4_status_page {
	__be32 rsvd1; /* flit 0 - hw owns */
	__be16 rsvd2;
	__be16 qid;
	__be16 cidx;
	__be16 pidx;
	u8 qp_err; /* flit 1 - sw owns */
	u8 db_off;
	u8 pad;
	u16 host_wq_pidx;
	u16 host_cidx;
	u16 host_pidx;
	};

	#define T4_EQ_ENTRY_SIZE 64

	#define T4_SQ_NUM_SLOTS 5
	#define T4_SQ_NUM_BYTES (T4_EQ_ENTRY_SIZE * T4_SQ_NUM_SLOTS)
	#define T4_MAX_SEND_SGE ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_send_wr) - \
	sizeof(struct fw_ri_isgl)) / sizeof(struct fw_ri_sge))
	#define T4_MAX_SEND_INLINE ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_send_wr) - \
	sizeof(struct fw_ri_immd)))
	#define T4_MAX_WRITE_INLINE ((T4_SQ_NUM_BYTES - \
	sizeof(struct fw_ri_rdma_write_wr) - \
	sizeof(struct fw_ri_immd)))
	#define T4_MAX_WRITE_SGE ((T4_SQ_NUM_BYTES - \
	sizeof(struct fw_ri_rdma_write_wr) - \
	sizeof(struct fw_ri_isgl)) / sizeof(struct fw_ri_sge))
	#define T4_MAX_FR_IMMD ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_fr_nsmr_wr) - \
	sizeof(struct fw_ri_immd)) & ~31UL)
	#define T4_MAX_FR_IMMD_DEPTH (T4_MAX_FR_IMMD / sizeof(u64))
	#define T4_MAX_FR_DSGL 1024
	#define T4_MAX_FR_DSGL_DEPTH (T4_MAX_FR_DSGL / sizeof(u64))

	static inline int t4_max_fr_depth(int use_dsgl)
	{
	return use_dsgl ? T4_MAX_FR_DSGL_DEPTH : T4_MAX_FR_IMMD_DEPTH;
	}

	#define T4_RQ_NUM_SLOTS 2
	#define T4_RQ_NUM_BYTES (T4_EQ_ENTRY_SIZE * T4_RQ_NUM_SLOTS)
	#define T4_MAX_RECV_SGE 4

	union t4_wr {
	struct fw_ri_res_wr res;
	struct fw_ri_wr ri;
	struct fw_ri_rdma_write_wr write;
	struct fw_ri_send_wr send;
	struct fw_ri_rdma_read_wr read;
	struct fw_ri_bind_mw_wr bind;
	struct fw_ri_fr_nsmr_wr fr;
	struct fw_ri_inv_lstag_wr inv;
	struct t4_status_page status;
	__be64 flits[T4_EQ_ENTRY_SIZE / sizeof(__be64) * T4_SQ_NUM_SLOTS];
	};

	union t4_recv_wr {
	struct fw_ri_recv_wr recv;
	struct t4_status_page status;
	__be64 flits[T4_EQ_ENTRY_SIZE / sizeof(__be64) * T4_RQ_NUM_SLOTS];
	};

	static inline void init_wr_hdr(union t4_wr *wqe, u16 wrid,
	enum fw_wr_opcodes opcode, u8 flags, u8 len16)
	{
	wqe->send.opcode = (u8)opcode;
	wqe->send.flags = flags;
	wqe->send.wrid = wrid;
	wqe->send.r1[0] = 0;
	wqe->send.r1[1] = 0;
	wqe->send.r1[2] = 0;
	wqe->send.len16 = len16;
	}

	/* CQE/AE status codes */
	#define T4_ERR_SUCCESS 0x0
	#define T4_ERR_STAG 0x1 /* STAG invalid: either the */
	/* STAG is offlimt, being 0, */
	/* or STAG_key mismatch */
	#define T4_ERR_PDID 0x2 /* PDID mismatch */
	#define T4_ERR_QPID 0x3 /* QPID mismatch */
	#define T4_ERR_ACCESS 0x4 /* Invalid access right */
	#define T4_ERR_WRAP 0x5 /* Wrap error */
	#define T4_ERR_BOUND 0x6 /* base and bounds voilation */
	#define T4_ERR_INVALIDATE_SHARED_MR 0x7 /* attempt to invalidate a */
	/* shared memory region */
	#define T4_ERR_INVALIDATE_MR_WITH_MW_BOUND 0x8 /* attempt to invalidate a */
	/* shared memory region */
	#define T4_ERR_ECC 0x9 /* ECC error detected */
	#define T4_ERR_ECC_PSTAG 0xA /* ECC error detected when */
	/* reading PSTAG for a MW */
	/* Invalidate */
	#define T4_ERR_PBL_ADDR_BOUND 0xB /* pbl addr out of bounds: */
	/* software error */
	#define T4_ERR_SWFLUSH 0xC /* SW FLUSHED */
	#define T4_ERR_CRC 0x10 /* CRC error */
	#define T4_ERR_MARKER 0x11 /* Marker error */
	#define T4_ERR_PDU_LEN_ERR 0x12 /* invalid PDU length */
	#define T4_ERR_OUT_OF_RQE 0x13 /* out of RQE */
	#define T4_ERR_DDP_VERSION 0x14 /* wrong DDP version */
	#define T4_ERR_RDMA_VERSION 0x15 /* wrong RDMA version */
	#define T4_ERR_OPCODE 0x16 /* invalid rdma opcode */
	#define T4_ERR_DDP_QUEUE_NUM 0x17 /* invalid ddp queue number */
	#define T4_ERR_MSN 0x18 /* MSN error */
	#define T4_ERR_TBIT 0x19 /* tag bit not set correctly */
	#define T4_ERR_MO 0x1A /* MO not 0 for TERMINATE */
	/* or READ_REQ */
	#define T4_ERR_MSN_GAP 0x1B
	#define T4_ERR_MSN_RANGE 0x1C
	#define T4_ERR_IRD_OVERFLOW 0x1D
	#define T4_ERR_RQE_ADDR_BOUND 0x1E /* RQE addr out of bounds: */
	/* software error */
	#define T4_ERR_INTERNAL_ERR 0x1F /* internal error (opcode */
	/* mismatch) */
	/*
	* CQE defs
	*/
	struct t4_cqe {
	__be32 header;
	__be32 len;
	union {
	struct {
	__be32 stag;
	__be32 msn;
	} rcqe;
	struct {
	u32 nada1;
	u16 nada2;
	u16 cidx;
	} scqe;
	struct {
	__be32 wrid_hi;
	__be32 wrid_low;
	} gen;
	} u;
	__be64 reserved;
	__be64 bits_type_ts;
	};

	/* macros for flit 0 of the cqe */

	#define CQE_QPID_S 12
	#define CQE_QPID_M 0xFFFFF
	#define CQE_QPID_G(x) ((((x) >> CQE_QPID_S)) & CQE_QPID_M)
	#define CQE_QPID_V(x) ((x)<<CQE_QPID_S)

	#define CQE_SWCQE_S 11
	#define CQE_SWCQE_M 0x1
	#define CQE_SWCQE_G(x) ((((x) >> CQE_SWCQE_S)) & CQE_SWCQE_M)
	#define CQE_SWCQE_V(x) ((x)<<CQE_SWCQE_S)

	#define CQE_STATUS_S 5
	#define CQE_STATUS_M 0x1F
	#define CQE_STATUS_G(x) ((((x) >> CQE_STATUS_S)) & CQE_STATUS_M)
	#define CQE_STATUS_V(x) ((x)<<CQE_STATUS_S)

	#define CQE_TYPE_S 4
	#define CQE_TYPE_M 0x1
	#define CQE_TYPE_G(x) ((((x) >> CQE_TYPE_S)) & CQE_TYPE_M)
	#define CQE_TYPE_V(x) ((x)<<CQE_TYPE_S)

	#define CQE_OPCODE_S 0
	#define CQE_OPCODE_M 0xF
	#define CQE_OPCODE_G(x) ((((x) >> CQE_OPCODE_S)) & CQE_OPCODE_M)
	#define CQE_OPCODE_V(x) ((x)<<CQE_OPCODE_S)

	#define SW_CQE(x) (CQE_SWCQE_G(be32_to_cpu((x)->header)))
	#define CQE_QPID(x) (CQE_QPID_G(be32_to_cpu((x)->header)))
	#define CQE_TYPE(x) (CQE_TYPE_G(be32_to_cpu((x)->header)))
	#define SQ_TYPE(x) (CQE_TYPE((x)))
	#define RQ_TYPE(x) (!CQE_TYPE((x)))
	#define CQE_STATUS(x) (CQE_STATUS_G(be32_to_cpu((x)->header)))
	#define CQE_OPCODE(x) (CQE_OPCODE_G(be32_to_cpu((x)->header)))

	#define CQE_SEND_OPCODE(x)( \
	(CQE_OPCODE_G(be32_to_cpu((x)->header)) == FW_RI_SEND) \|\| \
	(CQE_OPCODE_G(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_SE) \|\| \
	(CQE_OPCODE_G(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_INV) \|\| \
	(CQE_OPCODE_G(be32_to_cpu((x)->header)) == FW_RI_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_IDX(x) ((x)->u.scqe.cidx)

	/* generic accessor macros */
	#define CQE_WRID_HI(x) (be32_to_cpu((x)->u.gen.wrid_hi))
	#define CQE_WRID_LOW(x) (be32_to_cpu((x)->u.gen.wrid_low))

	/* macros for flit 3 of the cqe */
	#define CQE_GENBIT_S 63
	#define CQE_GENBIT_M 0x1
	#define CQE_GENBIT_G(x) (((x) >> CQE_GENBIT_S) & CQE_GENBIT_M)
	#define CQE_GENBIT_V(x) ((x)<<CQE_GENBIT_S)

	#define CQE_OVFBIT_S 62
	#define CQE_OVFBIT_M 0x1
	#define CQE_OVFBIT_G(x) ((((x) >> CQE_OVFBIT_S)) & CQE_OVFBIT_M)

	#define CQE_IQTYPE_S 60
	#define CQE_IQTYPE_M 0x3
	#define CQE_IQTYPE_G(x) ((((x) >> CQE_IQTYPE_S)) & CQE_IQTYPE_M)

	#define CQE_TS_M 0x0fffffffffffffffULL
	#define CQE_TS_G(x) ((x) & CQE_TS_M)

	#define CQE_OVFBIT(x) ((unsigned)CQE_OVFBIT_G(be64_to_cpu((x)->bits_type_ts)))
	#define CQE_GENBIT(x) ((unsigned)CQE_GENBIT_G(be64_to_cpu((x)->bits_type_ts)))
	#define CQE_TS(x) (CQE_TS_G(be64_to_cpu((x)->bits_type_ts)))

	struct t4_swsqe {
	u64 wr_id;
	struct t4_cqe cqe;
	int read_len;
	int opcode;
	int complete;
	int signaled;
	u16 idx;
	int flushed;
	struct timespec host_ts;
	u64 sge_ts;
	};

	static inline pgprot_t t4_pgprot_wc(pgprot_t prot)
	{
	#if defined(__i386__) \|\| defined(__x86_64__) \|\| defined(CONFIG_PPC64)
	return pgprot_writecombine(prot);
	#else
	return pgprot_noncached(prot);
	#endif
	}

	enum {
	T4_SQ_ONCHIP = (1<<0),
	};

	struct t4_sq {
	union t4_wr *queue;
	dma_addr_t dma_addr;
	DEFINE_DMA_UNMAP_ADDR(mapping);
	unsigned long phys_addr;
	struct t4_swsqe *sw_sq;
	struct t4_swsqe *oldest_read;
	u64 __iomem *udb;
	size_t memsize;
	u32 qid;
	u16 in_use;
	u16 size;
	u16 cidx;
	u16 pidx;
	u16 wq_pidx;
	u16 wq_pidx_inc;
	u16 flags;
	short flush_cidx;
	};

	struct t4_swrqe {
	u64 wr_id;
	struct timespec host_ts;
	u64 sge_ts;
	};

	struct t4_rq {
	union t4_recv_wr *queue;
	dma_addr_t dma_addr;
	DEFINE_DMA_UNMAP_ADDR(mapping);
	struct t4_swrqe *sw_rq;
	u64 __iomem *udb;
	size_t memsize;
	u32 qid;
	u32 msn;
	u32 rqt_hwaddr;
	u16 rqt_size;
	u16 in_use;
	u16 size;
	u16 cidx;
	u16 pidx;
	u16 wq_pidx;
	u16 wq_pidx_inc;
	};

	struct t4_wq {
	struct t4_sq sq;
	struct t4_rq rq;
	void __iomem *db;
	void __iomem *gts;
	struct c4iw_rdev *rdev;
	int flushed;
	};

	static inline int t4_rqes_posted(struct t4_wq *wq)
	{
	return wq->rq.in_use;
	}

	static inline int t4_rq_empty(struct t4_wq *wq)
	{
	return wq->rq.in_use == 0;
	}

	static inline int t4_rq_full(struct t4_wq *wq)
	{
	return wq->rq.in_use == (wq->rq.size - 1);
	}

	static inline u32 t4_rq_avail(struct t4_wq *wq)
	{
	return wq->rq.size - 1 - wq->rq.in_use;
	}

	static inline void t4_rq_produce(struct t4_wq *wq, u8 len16)
	{
	wq->rq.in_use++;
	if (++wq->rq.pidx == wq->rq.size)
	wq->rq.pidx = 0;
	wq->rq.wq_pidx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE);
	if (wq->rq.wq_pidx >= wq->rq.size * T4_RQ_NUM_SLOTS)
	wq->rq.wq_pidx %= wq->rq.size * T4_RQ_NUM_SLOTS;
	}

	static inline void t4_rq_consume(struct t4_wq *wq)
	{
	wq->rq.in_use--;
	wq->rq.msn++;
	if (++wq->rq.cidx == wq->rq.size)
	wq->rq.cidx = 0;
	}

	static inline u16 t4_rq_host_wq_pidx(struct t4_wq *wq)
	{
	return wq->rq.queue[wq->rq.size].status.host_wq_pidx;
	}

	static inline u16 t4_rq_wq_size(struct t4_wq *wq)
	{
	return wq->rq.size * T4_RQ_NUM_SLOTS;
	}

	static inline int t4_sq_onchip(struct t4_sq *sq)
	{
	return sq->flags & T4_SQ_ONCHIP;
	}

	static inline int t4_sq_empty(struct t4_wq *wq)
	{
	return wq->sq.in_use == 0;
	}

	static inline int t4_sq_full(struct t4_wq *wq)
	{
	return wq->sq.in_use == (wq->sq.size - 1);
	}

	static inline u32 t4_sq_avail(struct t4_wq *wq)
	{
	return wq->sq.size - 1 - wq->sq.in_use;
	}

	static inline void t4_sq_produce(struct t4_wq *wq, u8 len16)
	{
	wq->sq.in_use++;
	if (++wq->sq.pidx == wq->sq.size)
	wq->sq.pidx = 0;
	wq->sq.wq_pidx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE);
	if (wq->sq.wq_pidx >= wq->sq.size * T4_SQ_NUM_SLOTS)
	wq->sq.wq_pidx %= wq->sq.size * T4_SQ_NUM_SLOTS;
	}

	static inline void t4_sq_consume(struct t4_wq *wq)
	{
	BUG_ON(wq->sq.in_use < 1);
	if (wq->sq.cidx == wq->sq.flush_cidx)
	wq->sq.flush_cidx = -1;
	wq->sq.in_use--;
	if (++wq->sq.cidx == wq->sq.size)
	wq->sq.cidx = 0;
	}

	static inline u16 t4_sq_host_wq_pidx(struct t4_wq *wq)
	{
	return wq->sq.queue[wq->sq.size].status.host_wq_pidx;
	}

	static inline u16 t4_sq_wq_size(struct t4_wq *wq)
	{
	return wq->sq.size * T4_SQ_NUM_SLOTS;
	}

	/* This function copies 64 byte coalesced work request to memory
	* mapped BAR2 space. For coalesced WRs, the SGE fetches data
	* from the FIFO instead of from Host.
	*/
	static inline void pio_copy(u64 __iomem dst, u64 src)
	{
	int count = 8;

	while (count) {
	writeq(*src, dst);
	src++;
	dst++;
	count--;
	}
	}

	static inline void t4_ring_sq_db(struct t4_wq *wq, u16 inc, u8 t5,
	union t4_wr *wqe)
	{

	/* Flush host queue memory writes. */
	wmb();
	if (t5) {
	if (inc == 1 && wqe) {
	PDBG("%s: WC wq->sq.pidx = %d\n",
	__func__, wq->sq.pidx);
	pio_copy(wq->sq.udb + 7, (void *)wqe);
	} else {
	PDBG("%s: DB wq->sq.pidx = %d\n",
	__func__, wq->sq.pidx);
	writel(PIDX_T5_V(inc), wq->sq.udb);
	}

	/* Flush user doorbell area writes. */
	wmb();
	return;
	}
	writel(QID_V(wq->sq.qid) \| PIDX_V(inc), wq->db);
	}

	static inline void t4_ring_rq_db(struct t4_wq *wq, u16 inc, u8 t5,
	union t4_recv_wr *wqe)
	{

	/* Flush host queue memory writes. */
	wmb();
	if (t5) {
	if (inc == 1 && wqe) {
	PDBG("%s: WC wq->rq.pidx = %d\n",
	__func__, wq->rq.pidx);
	pio_copy(wq->rq.udb + 7, (void *)wqe);
	} else {
	PDBG("%s: DB wq->rq.pidx = %d\n",
	__func__, wq->rq.pidx);
	writel(PIDX_T5_V(inc), wq->rq.udb);
	}

	/* Flush user doorbell area writes. */
	wmb();
	return;
	}
	writel(QID_V(wq->rq.qid) \| PIDX_V(inc), wq->db);
	}

	static inline int t4_wq_in_error(struct t4_wq *wq)
	{
	return wq->rq.queue[wq->rq.size].status.qp_err;
	}

	static inline void t4_set_wq_in_error(struct t4_wq *wq)
	{
	wq->rq.queue[wq->rq.size].status.qp_err = 1;
	}

	static inline void t4_disable_wq_db(struct t4_wq *wq)
	{
	wq->rq.queue[wq->rq.size].status.db_off = 1;
	}

	static inline void t4_enable_wq_db(struct t4_wq *wq)
	{
	wq->rq.queue[wq->rq.size].status.db_off = 0;
	}

	static inline int t4_wq_db_enabled(struct t4_wq *wq)
	{
	return !wq->rq.queue[wq->rq.size].status.db_off;
	}

	enum t4_cq_flags {
	CQ_ARMED = 1,
	};

	struct t4_cq {
	struct t4_cqe *queue;
	dma_addr_t dma_addr;
	DEFINE_DMA_UNMAP_ADDR(mapping);
	struct t4_cqe *sw_queue;
	void __iomem *gts;
	struct c4iw_rdev *rdev;
	u64 ugts;
	size_t memsize;
	__be64 bits_type_ts;
	u32 cqid;
	u32 qid_mask;
	int vector;
	u16 size; /* including status page */
	u16 cidx;
	u16 sw_pidx;
	u16 sw_cidx;
	u16 sw_in_use;
	u16 cidx_inc;
	u8 gen;
	u8 error;
	unsigned long flags;
	};

	static inline int t4_clear_cq_armed(struct t4_cq *cq)
	{
	return test_and_clear_bit(CQ_ARMED, &cq->flags);
	}

	static inline int t4_arm_cq(struct t4_cq *cq, int se)
	{
	u32 val;

	set_bit(CQ_ARMED, &cq->flags);
	while (cq->cidx_inc > CIDXINC_M) {
	val = SEINTARM_V(0) \| CIDXINC_V(CIDXINC_M) \| TIMERREG_V(7) \|
	INGRESSQID_V(cq->cqid & cq->qid_mask);
	writel(val, cq->gts);
	cq->cidx_inc -= CIDXINC_M;
	}
	val = SEINTARM_V(se) \| CIDXINC_V(cq->cidx_inc) \| TIMERREG_V(6) \|
	INGRESSQID_V(cq->cqid & cq->qid_mask);
	writel(val, cq->gts);
	cq->cidx_inc = 0;
	return 0;
	}

	static inline void t4_swcq_produce(struct t4_cq *cq)
	{
	cq->sw_in_use++;
	if (cq->sw_in_use == cq->size) {
	PDBG("%s cxgb4 sw cq overflow cqid %u\n", __func__, cq->cqid);
	cq->error = 1;
	BUG_ON(1);
	}
	if (++cq->sw_pidx == cq->size)
	cq->sw_pidx = 0;
	}

	static inline void t4_swcq_consume(struct t4_cq *cq)
	{
	BUG_ON(cq->sw_in_use < 1);
	cq->sw_in_use--;
	if (++cq->sw_cidx == cq->size)
	cq->sw_cidx = 0;
	}

	static inline void t4_hwcq_consume(struct t4_cq *cq)
	{
	cq->bits_type_ts = cq->queue[cq->cidx].bits_type_ts;
	if (++cq->cidx_inc == (cq->size >> 4) \|\| cq->cidx_inc == CIDXINC_M) {
	u32 val;

	val = SEINTARM_V(0) \| CIDXINC_V(cq->cidx_inc) \| TIMERREG_V(7) \|
	INGRESSQID_V(cq->cqid & cq->qid_mask);
	writel(val, cq->gts);
	cq->cidx_inc = 0;
	}
	if (++cq->cidx == cq->size) {
	cq->cidx = 0;
	cq->gen ^= 1;
	}
	}

	static inline int t4_valid_cqe(struct t4_cq cq, struct t4_cqe cqe)
	{
	return (CQE_GENBIT(cqe) == cq->gen);
	}

	static inline int t4_next_hw_cqe(struct t4_cq cq, struct t4_cqe *cqe)
	{
	int ret;
	u16 prev_cidx;

	if (cq->cidx == 0)
	prev_cidx = cq->size - 1;
	else
	prev_cidx = cq->cidx - 1;

	if (cq->queue[prev_cidx].bits_type_ts != cq->bits_type_ts) {
	ret = -EOVERFLOW;
	cq->error = 1;
	printk(KERN_ERR MOD "cq overflow cqid %u\n", cq->cqid);
	BUG_ON(1);
	} else if (t4_valid_cqe(cq, &cq->queue[cq->cidx])) {

	/* Ensure CQE is flushed to memory */
	rmb();
	*cqe = &cq->queue[cq->cidx];
	ret = 0;
	} else
	ret = -ENODATA;
	return ret;
	}

	static inline struct t4_cqe t4_next_sw_cqe(struct t4_cq cq)
	{
	if (cq->sw_in_use == cq->size) {
	PDBG("%s cxgb4 sw cq overflow cqid %u\n", __func__, cq->cqid);
	cq->error = 1;
	BUG_ON(1);
	return NULL;
	}
	if (cq->sw_in_use)
	return &cq->sw_queue[cq->sw_cidx];
	return NULL;
	}

	static inline int t4_next_cqe(struct t4_cq cq, struct t4_cqe *cqe)
	{
	int ret = 0;

	if (cq->error)
	ret = -ENODATA;
	else if (cq->sw_in_use)
	*cqe = &cq->sw_queue[cq->sw_cidx];
	else
	ret = t4_next_hw_cqe(cq, cqe);
	return ret;
	}

	static inline int t4_cq_in_error(struct t4_cq *cq)
	{
	return ((struct t4_status_page *)&cq->queue[cq->size])->qp_err;
	}

	static inline void t4_set_cq_in_error(struct t4_cq *cq)
	{
	((struct t4_status_page *)&cq->queue[cq->size])->qp_err = 1;
	}
	#endif

	struct t4_dev_status_page {
	u8 db_off;
	};