LXR linux/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 <linux/mlx5/driver.h>
  37#include <linux/refcount.h>
  38
  39struct mlx5_core_cq {
  40        u32                     cqn;
  41        int                     cqe_sz;
  42        __be32                 *set_ci_db;
  43        __be32                 *arm_db;
  44        struct mlx5_uars_page  *uar;
  45        refcount_t              refcount;
  46        struct completion       free;
  47        unsigned                vector;
  48        unsigned int            irqn;
  49        void (*comp)(struct mlx5_core_cq *cq, struct mlx5_eqe *eqe);
  50        void (*event)           (struct mlx5_core_cq *, enum mlx5_event);
  51        u32                     cons_index;
  52        unsigned                arm_sn;
  53        struct mlx5_rsc_debug   *dbg;
  54        int                     pid;
  55        struct {
  56                struct list_head list;
  57                void (*comp)(struct mlx5_core_cq *cq, struct mlx5_eqe *eqe);
  58                void            *priv;
  59        } tasklet_ctx;
  60        int                     reset_notify_added;
  61        struct list_head        reset_notify;
  62        struct mlx5_eq_comp     *eq;
  63        u16 uid;
  64};
  65
  66
  67enum {
  68        MLX5_CQE_SYNDROME_LOCAL_LENGTH_ERR              = 0x01,
  69        MLX5_CQE_SYNDROME_LOCAL_QP_OP_ERR               = 0x02,
  70        MLX5_CQE_SYNDROME_LOCAL_PROT_ERR                = 0x04,
  71        MLX5_CQE_SYNDROME_WR_FLUSH_ERR                  = 0x05,
  72        MLX5_CQE_SYNDROME_MW_BIND_ERR                   = 0x06,
  73        MLX5_CQE_SYNDROME_BAD_RESP_ERR                  = 0x10,
  74        MLX5_CQE_SYNDROME_LOCAL_ACCESS_ERR              = 0x11,
  75        MLX5_CQE_SYNDROME_REMOTE_INVAL_REQ_ERR          = 0x12,
  76        MLX5_CQE_SYNDROME_REMOTE_ACCESS_ERR             = 0x13,
  77        MLX5_CQE_SYNDROME_REMOTE_OP_ERR                 = 0x14,
  78        MLX5_CQE_SYNDROME_TRANSPORT_RETRY_EXC_ERR       = 0x15,
  79        MLX5_CQE_SYNDROME_RNR_RETRY_EXC_ERR             = 0x16,
  80        MLX5_CQE_SYNDROME_REMOTE_ABORTED_ERR            = 0x22,
  81};
  82
  83enum {
  84        MLX5_CQE_OWNER_MASK     = 1,
  85        MLX5_CQE_REQ            = 0,
  86        MLX5_CQE_RESP_WR_IMM    = 1,
  87        MLX5_CQE_RESP_SEND      = 2,
  88        MLX5_CQE_RESP_SEND_IMM  = 3,
  89        MLX5_CQE_RESP_SEND_INV  = 4,
  90        MLX5_CQE_RESIZE_CQ      = 5,
  91        MLX5_CQE_SIG_ERR        = 12,
  92        MLX5_CQE_REQ_ERR        = 13,
  93        MLX5_CQE_RESP_ERR       = 14,
  94        MLX5_CQE_INVALID        = 15,
  95};
  96
  97enum {
  98        MLX5_CQ_MODIFY_PERIOD   = 1 << 0,
  99        MLX5_CQ_MODIFY_COUNT    = 1 << 1,
 100        MLX5_CQ_MODIFY_OVERRUN  = 1 << 2,
 101};
 102
 103enum {
 104        MLX5_CQ_OPMOD_RESIZE            = 1,
 105        MLX5_MODIFY_CQ_MASK_LOG_SIZE    = 1 << 0,
 106        MLX5_MODIFY_CQ_MASK_PG_OFFSET   = 1 << 1,
 107        MLX5_MODIFY_CQ_MASK_PG_SIZE     = 1 << 2,
 108};
 109
 110struct mlx5_cq_modify_params {
 111        int     type;
 112        union {
 113                struct {
 114                        u32     page_offset;
 115                        u8      log_cq_size;
 116                } resize;
 117
 118                struct {
 119                } moder;
 120
 121                struct {
 122                } mapping;
 123        } params;
 124};
 125
 126enum {
 127        CQE_STRIDE_64 = 0,
 128        CQE_STRIDE_128 = 1,
 129        CQE_STRIDE_128_PAD = 2,
 130};
 131
 132#define MLX5_MAX_CQ_PERIOD (BIT(__mlx5_bit_sz(cqc, cq_period)) - 1)
 133#define MLX5_MAX_CQ_COUNT (BIT(__mlx5_bit_sz(cqc, cq_max_count)) - 1)
 134
 135static inline int cqe_sz_to_mlx_sz(u8 size, int padding_128_en)
 136{
 137        return padding_128_en ? CQE_STRIDE_128_PAD :
 138                                size == 64 ? CQE_STRIDE_64 : CQE_STRIDE_128;
 139}
 140
 141static inline void mlx5_cq_set_ci(struct mlx5_core_cq *cq)
 142{
 143        *cq->set_ci_db = cpu_to_be32(cq->cons_index & 0xffffff);
 144}
 145
 146enum {
 147        MLX5_CQ_DB_REQ_NOT_SOL          = 1 << 24,
 148        MLX5_CQ_DB_REQ_NOT              = 0 << 24
 149};
 150
 151static inline void mlx5_cq_arm(struct mlx5_core_cq *cq, u32 cmd,
 152                               void __iomem *uar_page,
 153                               u32 cons_index)
 154{
 155        __be32 doorbell[2];
 156        u32 sn;
 157        u32 ci;
 158
 159        sn = cq->arm_sn & 3;
 160        ci = cons_index & 0xffffff;
 161
 162        *cq->arm_db = cpu_to_be32(sn << 28 | cmd | ci);
 163
 164        /* Make sure that the doorbell record in host memory is
 165         * written before ringing the doorbell via PCI MMIO.
 166         */
 167        wmb();
 168
 169        doorbell[0] = cpu_to_be32(sn << 28 | cmd | ci);
 170        doorbell[1] = cpu_to_be32(cq->cqn);
 171
 172        mlx5_write64(doorbell, uar_page + MLX5_CQ_DOORBELL);
 173}
 174
 175static inline void mlx5_cq_hold(struct mlx5_core_cq *cq)
 176{
 177        refcount_inc(&cq->refcount);
 178}
 179
 180static inline void mlx5_cq_put(struct mlx5_core_cq *cq)
 181{
 182        if (refcount_dec_and_test(&cq->refcount))
 183                complete(&cq->free);
 184}
 185
 186int mlx5_core_create_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
 187                        u32 *in, int inlen, u32 *out, int outlen);
 188int mlx5_core_destroy_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq);
 189int mlx5_core_query_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
 190                       u32 *out);
 191int mlx5_core_modify_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq,
 192                        u32 *in, int inlen);
 193int mlx5_core_modify_cq_moderation(struct mlx5_core_dev *dev,
 194                                   struct mlx5_core_cq *cq, u16 cq_period,
 195                                   u16 cq_max_count);
 196static inline void mlx5_dump_err_cqe(struct mlx5_core_dev *dev,
 197                                     struct mlx5_err_cqe *err_cqe)
 198{
 199        print_hex_dump(KERN_WARNING, "", DUMP_PREFIX_OFFSET, 16, 1, err_cqe,
 200                       sizeof(*err_cqe), false);
 201}
 202int mlx5_debug_cq_add(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq);
 203void mlx5_debug_cq_remove(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq);
 204
 205#endif /* MLX5_CORE_CQ_H */
 206