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/*

 * Copyright (c) 2007 Cisco Systems, 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 MLX4_CQ_H

#define MLX4_CQ_H

#include <linux/types.h>

#include <linux/mlx4/device.h>

#include <linux/mlx4/doorbell.h>

struct mlx4_cqe {

        __be32                  my_qpn;

        __be32                  immed_rss_invalid;

        __be32                  g_mlpath_rqpn;

        u8                      sl;

        u8                      reserved1;

        __be16                  rlid;

        u32                     reserved2;

        __be32                  byte_cnt;

        __be16                  wqe_index;

        __be16                  checksum;

        u8                      reserved3[3];

        u8                      owner_sr_opcode;

};

struct mlx4_err_cqe {

        __be32                  my_qpn;

        u32                     reserved1[5];

        __be16                  wqe_index;

        u8                      vendor_err_syndrome;

        u8                      syndrome;

        u8                      reserved2[3];

        u8                      owner_sr_opcode;

};

enum {

        MLX4_CQE_OWNER_MASK     = 0x80,

        MLX4_CQE_IS_SEND_MASK   = 0x40,

        MLX4_CQE_OPCODE_MASK    = 0x1f

};

enum {

        MLX4_CQE_SYNDROME_LOCAL_LENGTH_ERR              = 0x01,

        MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR               = 0x02,

        MLX4_CQE_SYNDROME_LOCAL_PROT_ERR                = 0x04,

        MLX4_CQE_SYNDROME_WR_FLUSH_ERR                  = 0x05,

        MLX4_CQE_SYNDROME_MW_BIND_ERR                   = 0x06,

        MLX4_CQE_SYNDROME_BAD_RESP_ERR                  = 0x10,

        MLX4_CQE_SYNDROME_LOCAL_ACCESS_ERR              = 0x11,

        MLX4_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR          = 0x12,

        MLX4_CQE_SYNDROME_REMOTE_ACCESS_ERR             = 0x13,

        MLX4_CQE_SYNDROME_REMOTE_OP_ERR                 = 0x14,

        MLX4_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR       = 0x15,

        MLX4_CQE_SYNDROME_RNR_RETRY_EXC_ERR             = 0x16,

        MLX4_CQE_SYNDROME_REMOTE_ABORTED_ERR            = 0x22,

};

static inline void mlx4_cq_arm(struct mlx4_cq *cq, u32 cmd,

                               void __iomem *uar_page,

                               spinlock_t *doorbell_lock)

{

        __be32 doorbell[2];

        u32 sn;

        u32 ci;

        sn = cq->arm_sn & 3;

        ci = cq->cons_index & 0xffffff;

        *cq->arm_db = cpu_to_be32(sn << 28 | cmd | ci);

        /*

         * Make sure that the doorbell record in host memory is

         * written before ringing the doorbell via PCI MMIO.

         */

        wmb();

        doorbell[0] = cpu_to_be32(sn << 28 | cmd | cq->cqn);

        doorbell[1] = cpu_to_be32(ci);

        mlx4_write64(doorbell, uar_page + MLX4_CQ_DOORBELL, doorbell_lock);

}

static inline void mlx4_cq_set_ci(struct mlx4_cq *cq)

{

        *cq->set_ci_db = cpu_to_be32(cq->cons_index & 0xffffff);

}

enum {

        MLX4_CQ_DB_REQ_NOT_SOL          = 1 << 24,

        MLX4_CQ_DB_REQ_NOT              = 2 << 24

};

#endif /* MLX4_CQ_H */