cq.h

Go to the documentation of this file.

/*
 * 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          vlan_my_qpn;
    __be32          immed_rss_invalid;
    __be32          g_mlpath_rqpn;
    __be16          sl_vid;
    __be16          rlid;
    __be16          status;
    u8          ipv6_ext_mask;
    u8          badfcs_enc;
    __be32          byte_cnt;
    __be16          wqe_index;
    __be16          checksum;
    u8          reserved[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_VLAN_PRESENT_MASK  = 1 << 29,
    MLX4_CQE_QPN_MASK       = 0xffffff,
};

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,
};

enum {
    MLX4_CQE_STATUS_IPV4        = 1 << 6,
    MLX4_CQE_STATUS_IPV4F       = 1 << 7,
    MLX4_CQE_STATUS_IPV6        = 1 << 8,
    MLX4_CQE_STATUS_IPV4OPT     = 1 << 9,
    MLX4_CQE_STATUS_TCP     = 1 << 10,
    MLX4_CQE_STATUS_UDP     = 1 << 11,
    MLX4_CQE_STATUS_IPOK        = 1 << 12,
};

enum {
    MLX4_CQE_LLC                     = 1,
    MLX4_CQE_SNAP                    = 1 << 1,
    MLX4_CQE_BAD_FCS                 = 1 << 4,
};

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
};

int mlx4_cq_modify(struct mlx4_dev *dev, struct mlx4_cq *cq,
           u16 count, u16 period);
int mlx4_cq_resize(struct mlx4_dev *dev, struct mlx4_cq *cq,
           int entries, struct mlx4_mtt *mtt);

#endif /* MLX4_CQ_H */