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   1 /*
   2  * Copyright (c) 2007 Cisco Systems, Inc.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #ifndef MLX4_CQ_H
  34 #define MLX4_CQ_H
  35
  36 #include <linux/types.h>
  37
  38 #include <linux/mlx4/device.h>
  39 #include <linux/mlx4/doorbell.h>
  40
  41 struct mlx4_cqe {
  42         __be32                  my_qpn;
  43         __be32                  immed_rss_invalid;
  44         __be32                  g_mlpath_rqpn;
  45         u8                      sl;
  46         u8                      reserved1;
  47         __be16                  rlid;
  48         u32                     reserved2;
  49         __be32                  byte_cnt;
  50         __be16                  wqe_index;
  51         __be16                  checksum;
  52         u8                      reserved3[3];
  53         u8                      owner_sr_opcode;
  54 };
  55
  56 struct mlx4_err_cqe {
  57         __be32                  my_qpn;
  58         u32                     reserved1[5];
  59         __be16                  wqe_index;
  60         u8                      vendor_err_syndrome;
  61         u8                      syndrome;
  62         u8                      reserved2[3];
  63         u8                      owner_sr_opcode;
  64 };
  65
  66 enum {
  67         MLX4_CQE_OWNER_MASK     = 0x80,
  68         MLX4_CQE_IS_SEND_MASK   = 0x40,
  69         MLX4_CQE_OPCODE_MASK    = 0x1f
  70 };
  71
  72 enum {
  73         MLX4_CQE_SYNDROME_LOCAL_LENGTH_ERR              = 0x01,
  74         MLX4_CQE_SYNDROME_LOCAL_QP_OP_ERR               = 0x02,
  75         MLX4_CQE_SYNDROME_LOCAL_PROT_ERR                = 0x04,
  76         MLX4_CQE_SYNDROME_WR_FLUSH_ERR                  = 0x05,
  77         MLX4_CQE_SYNDROME_MW_BIND_ERR                   = 0x06,
  78         MLX4_CQE_SYNDROME_BAD_RESP_ERR                  = 0x10,
  79         MLX4_CQE_SYNDROME_LOCAL_ACCESS_ERR              = 0x11,
  80         MLX4_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR          = 0x12,
  81         MLX4_CQE_SYNDROME_REMOTE_ACCESS_ERR             = 0x13,
  82         MLX4_CQE_SYNDROME_REMOTE_OP_ERR                 = 0x14,
  83         MLX4_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR       = 0x15,
  84         MLX4_CQE_SYNDROME_RNR_RETRY_EXC_ERR             = 0x16,
  85         MLX4_CQE_SYNDROME_REMOTE_ABORTED_ERR            = 0x22,
  86 };
  87
  88 static inline void mlx4_cq_arm(struct mlx4_cq *cq, u32 cmd,
  89                                void __iomem *uar_page,
  90                                spinlock_t *doorbell_lock)
  91 {
  92         __be32 doorbell[2];
  93         u32 sn;
  94         u32 ci;
  95
  96         sn = cq->arm_sn & 3;
  97         ci = cq->cons_index & 0xffffff;
  98
  99         *cq->arm_db = cpu_to_be32(sn << 28 | cmd | ci);
 100
 101         /*
 102          * Make sure that the doorbell record in host memory is
 103          * written before ringing the doorbell via PCI MMIO.
 104          */
 105         wmb();
 106
 107         doorbell[0] = cpu_to_be32(sn << 28 | cmd | cq->cqn);
 108         doorbell[1] = cpu_to_be32(ci);
 109
 110         mlx4_write64(doorbell, uar_page + MLX4_CQ_DOORBELL, doorbell_lock);
 111 }
 112
 113 static inline void mlx4_cq_set_ci(struct mlx4_cq *cq)
 114 {
 115         *cq->set_ci_db = cpu_to_be32(cq->cons_index & 0xffffff);
 116 }
 117
 118 enum {
 119         MLX4_CQ_DB_REQ_NOT_SOL          = 1 << 24,
 120         MLX4_CQ_DB_REQ_NOT              = 2 << 24
 121 };
 122
 123 #endif /* MLX4_CQ_H */