include/linux/mlx5/cq.h

   1 /*
   2  * Copyright (c) 2013-2015, Mellanox Technologies. 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 MLX5_CORE_CQ_H
  34 #define MLX5_CORE_CQ_H
  35
  36 #include <rdma/ib_verbs.h>
  37 #include <linux/mlx5/driver.h>
  38
  39
  40 struct mlx5_core_cq {
  41         u32                     cqn;
  42         int                     cqe_sz;
  43         __be32                 *set_ci_db;
  44         __be32                 *arm_db;
  45         atomic_t                refcount;
  46         struct completion       free;
  47         unsigned                vector;
  48         unsigned int            irqn;
  49         void (*comp)            (struct mlx5_core_cq *);
  50         void (*event)           (struct mlx5_core_cq *, enum mlx5_event);
  51         struct mlx5_uar        *uar;
  52         u32                     cons_index;
  53         unsigned                arm_sn;
  54         struct mlx5_rsc_debug   *dbg;
  55         int                     pid;
  56         struct {
  57                 struct list_head list;
  58                 void (*comp)(struct mlx5_core_cq *);
  59                 void            *priv;
  60         } tasklet_ctx;
  61 };
  62
  63
  64 enum {
  65         MLX5_CQE_SYNDROME_LOCAL_LENGTH_ERR              = 0x01,
  66         MLX5_CQE_SYNDROME_LOCAL_QP_OP_ERR               = 0x02,
  67         MLX5_CQE_SYNDROME_LOCAL_PROT_ERR                = 0x04,
  68         MLX5_CQE_SYNDROME_WR_FLUSH_ERR                  = 0x05,
  69         MLX5_CQE_SYNDROME_MW_BIND_ERR                   = 0x06,
  70         MLX5_CQE_SYNDROME_BAD_RESP_ERR                  = 0x10,
  71         MLX5_CQE_SYNDROME_LOCAL_ACCESS_ERR              = 0x11,
  72         MLX5_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR          = 0x12,
  73         MLX5_CQE_SYNDROME_REMOTE_ACCESS_ERR             = 0x13,
  74         MLX5_CQE_SYNDROME_REMOTE_OP_ERR                 = 0x14,
  75         MLX5_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR       = 0x15,
  76         MLX5_CQE_SYNDROME_RNR_RETRY_EXC_ERR             = 0x16,
  77         MLX5_CQE_SYNDROME_REMOTE_ABORTED_ERR            = 0x22,
  78 };
  79
  80 enum {
  81         MLX5_CQE_OWNER_MASK     = 1,
  82         MLX5_CQE_REQ            = 0,
  83         MLX5_CQE_RESP_WR_IMM    = 1,
  84         MLX5_CQE_RESP_SEND      = 2,
  85         MLX5_CQE_RESP_SEND_IMM  = 3,
  86         MLX5_CQE_RESP_SEND_INV  = 4,
  87         MLX5_CQE_RESIZE_CQ      = 5,
  88         MLX5_CQE_SIG_ERR        = 12,
  89         MLX5_CQE_REQ_ERR        = 13,
  90         MLX5_CQE_RESP_ERR       = 14,
  91         MLX5_CQE_INVALID        = 15,
  92 };
  93
  94 enum {
  95         MLX5_CQ_MODIFY_PERIOD   = 1 << 0,
  96         MLX5_CQ_MODIFY_COUNT    = 1 << 1,
  97         MLX5_CQ_MODIFY_OVERRUN  = 1 << 2,
  98 };
  99
 100 enum {
 101         MLX5_CQ_OPMOD_RESIZE            = 1,
 102         MLX5_MODIFY_CQ_MASK_LOG_SIZE    = 1 << 0,
 103         MLX5_MODIFY_CQ_MASK_PG_OFFSET   = 1 << 1,
 104         MLX5_MODIFY_CQ_MASK_PG_SIZE     = 1 << 2,
 105 };
 106
 107 struct mlx5_cq_modify_params {
 108         int     type;
 109         union {
 110                 struct {
 111                         u32     page_offset;
 112                         u8      log_cq_size;
 113                 } resize;
 114
 115                 struct {
 116                 } moder;
 117
 118                 struct {
 119                 } mapping;
 120         } params;
 121 };
 122
 123 enum {
 124         CQE_SIZE_64 = 0,
 125         CQE_SIZE_128 = 1,
 126 };
 127
 128 static inline int cqe_sz_to_mlx_sz(u8 size)
 129 {
 130         return size == 64 ? CQE_SIZE_64 : CQE_SIZE_128;
 131 }
 132
 133 static inline void mlx5_cq_set_ci(struct mlx5_core_cq *cq)
 134 {
 135         *cq->set_ci_db = cpu_to_be32(cq->cons_index & 0xffffff);
 136 }
 137
 138 enum {
 139         MLX5_CQ_DB_REQ_NOT_SOL          = 1 << 24,
 140         MLX5_CQ_DB_REQ_NOT              = 0 << 24
 141 };
 142
 143 static inline void mlx5_cq_arm(struct mlx5_core_cq *cq, u32 cmd,
 144                                void __iomem *uar_page,
 145                                spinlock_t *doorbell_lock,
 146                                u32 cons_index)
 147 {
 148         __be32 doorbell[2];
 149         u32 sn;
 150         u32 ci;
 151
 152         sn = cq->arm_sn & 3;
 153         ci = cons_index & 0xffffff;
 154
 155         *cq->arm_db = cpu_to_be32(sn << 28 | cmd | ci);
 156
 157         /* Make sure that the doorbell record in host memory is
 158          * written before ringing the doorbell via PCI MMIO.
 159          */
 160         wmb();
 161
 162         doorbell[0] = cpu_to_be32(sn << 28 | cmd | ci);
 163         doorbell[1] = cpu_to_be32(cq->cqn);
 164
 165         mlx5_write64(doorbell, uar_page + MLX5_CQ_DOORBELL, doorbell_lock);
 166 }
 167
 168 int mlx5_init_cq_table(struct mlx5_core_dev *dev);
 169 void mlx5_cleanup_cq_table(struct mlx5_core_dev *dev);
 170 int mlx5_core_create_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
 171                         struct mlx5_create_cq_mbox_in *in, int inlen);
 172 int mlx5_core_destroy_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq);
 173 int mlx5_core_query_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
 174                        struct mlx5_query_cq_mbox_out *out);
 175 int mlx5_core_modify_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
 176                         struct mlx5_modify_cq_mbox_in *in, int in_sz);
 177 int mlx5_core_modify_cq_moderation(struct mlx5_core_dev *dev,
 178                                    struct mlx5_core_cq *cq, u16 cq_period,
 179                                    u16 cq_max_count);
 180 int mlx5_debug_cq_add(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq);
 181 void mlx5_debug_cq_remove(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq);
 182
 183 #endif /* MLX5_CORE_CQ_H */