drivers/net/ethernet/mellanox/mlxsw/pci.h

   1 /*
   2  * drivers/net/ethernet/mellanox/mlxsw/pci.h
   3  * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
   4  * Copyright (c) 2015 Jiri Pirko <jiri@mellanox.com>
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. Neither the names of the copyright holders nor the names of its
  15  *    contributors may be used to endorse or promote products derived from
  16  *    this software without specific prior written permission.
  17  *
  18  * Alternatively, this software may be distributed under the terms of the
  19  * GNU General Public License ("GPL") version 2 as published by the Free
  20  * Software Foundation.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  23  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  26  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  32  * POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #ifndef _MLXSW_PCI_H
  36 #define _MLXSW_PCI_H
  37
  38 #include <linux/bitops.h>
  39
  40 #include "item.h"
  41
  42 #define PCI_DEVICE_ID_MELLANOX_SWITCHX2 0xc738
  43 #define PCI_DEVICE_ID_MELLANOX_SPECTRUM 0xcb84
  44 #define MLXSW_PCI_BAR0_SIZE             (1024 * 1024) /* 1MB */
  45 #define MLXSW_PCI_PAGE_SIZE             4096
  46
  47 #define MLXSW_PCI_CIR_BASE                      0x71000
  48 #define MLXSW_PCI_CIR_IN_PARAM_HI               MLXSW_PCI_CIR_BASE
  49 #define MLXSW_PCI_CIR_IN_PARAM_LO               (MLXSW_PCI_CIR_BASE + 0x04)
  50 #define MLXSW_PCI_CIR_IN_MODIFIER               (MLXSW_PCI_CIR_BASE + 0x08)
  51 #define MLXSW_PCI_CIR_OUT_PARAM_HI              (MLXSW_PCI_CIR_BASE + 0x0C)
  52 #define MLXSW_PCI_CIR_OUT_PARAM_LO              (MLXSW_PCI_CIR_BASE + 0x10)
  53 #define MLXSW_PCI_CIR_TOKEN                     (MLXSW_PCI_CIR_BASE + 0x14)
  54 #define MLXSW_PCI_CIR_CTRL                      (MLXSW_PCI_CIR_BASE + 0x18)
  55 #define MLXSW_PCI_CIR_CTRL_GO_BIT               BIT(23)
  56 #define MLXSW_PCI_CIR_CTRL_EVREQ_BIT            BIT(22)
  57 #define MLXSW_PCI_CIR_CTRL_OPCODE_MOD_SHIFT     12
  58 #define MLXSW_PCI_CIR_CTRL_STATUS_SHIFT         24
  59 #define MLXSW_PCI_CIR_TIMEOUT_MSECS             1000
  60
  61 #define MLXSW_PCI_SW_RESET                      0xF0010
  62 #define MLXSW_PCI_SW_RESET_RST_BIT              BIT(0)
  63 #define MLXSW_PCI_SW_RESET_TIMEOUT_MSECS        5000
  64
  65 #define MLXSW_PCI_DOORBELL_SDQ_OFFSET           0x000
  66 #define MLXSW_PCI_DOORBELL_RDQ_OFFSET           0x200
  67 #define MLXSW_PCI_DOORBELL_CQ_OFFSET            0x400
  68 #define MLXSW_PCI_DOORBELL_EQ_OFFSET            0x600
  69 #define MLXSW_PCI_DOORBELL_ARM_CQ_OFFSET        0x800
  70 #define MLXSW_PCI_DOORBELL_ARM_EQ_OFFSET        0xA00
  71
  72 #define MLXSW_PCI_DOORBELL(offset, type_offset, num)    \
  73         ((offset) + (type_offset) + (num) * 4)
  74
  75 #define MLXSW_PCI_CQS_MAX       96
  76 #define MLXSW_PCI_EQS_COUNT     2
  77 #define MLXSW_PCI_EQ_ASYNC_NUM  0
  78 #define MLXSW_PCI_EQ_COMP_NUM   1
  79
  80 #define MLXSW_PCI_AQ_PAGES      8
  81 #define MLXSW_PCI_AQ_SIZE       (MLXSW_PCI_PAGE_SIZE * MLXSW_PCI_AQ_PAGES)
  82 #define MLXSW_PCI_WQE_SIZE      32 /* 32 bytes per element */
  83 #define MLXSW_PCI_CQE_SIZE      16 /* 16 bytes per element */
  84 #define MLXSW_PCI_EQE_SIZE      16 /* 16 bytes per element */
  85 #define MLXSW_PCI_WQE_COUNT     (MLXSW_PCI_AQ_SIZE / MLXSW_PCI_WQE_SIZE)
  86 #define MLXSW_PCI_CQE_COUNT     (MLXSW_PCI_AQ_SIZE / MLXSW_PCI_CQE_SIZE)
  87 #define MLXSW_PCI_EQE_COUNT     (MLXSW_PCI_AQ_SIZE / MLXSW_PCI_EQE_SIZE)
  88 #define MLXSW_PCI_EQE_UPDATE_COUNT      0x80
  89
  90 #define MLXSW_PCI_WQE_SG_ENTRIES        3
  91 #define MLXSW_PCI_WQE_TYPE_ETHERNET     0xA
  92
  93 /* pci_wqe_c
  94  * If set it indicates that a completion should be reported upon
  95  * execution of this descriptor.
  96  */
  97 MLXSW_ITEM32(pci, wqe, c, 0x00, 31, 1);
  98
  99 /* pci_wqe_lp
 100  * Local Processing, set if packet should be processed by the local
 101  * switch hardware:
 102  * For Ethernet EMAD (Direct Route and non Direct Route) -
 103  * must be set if packet destination is local device
 104  * For InfiniBand CTL - must be set if packet destination is local device
 105  * Otherwise it must be clear
 106  * Local Process packets must not exceed the size of 2K (including payload
 107  * and headers).
 108  */
 109 MLXSW_ITEM32(pci, wqe, lp, 0x00, 30, 1);
 110
 111 /* pci_wqe_type
 112  * Packet type.
 113  */
 114 MLXSW_ITEM32(pci, wqe, type, 0x00, 23, 4);
 115
 116 /* pci_wqe_byte_count
 117  * Size of i-th scatter/gather entry, 0 if entry is unused.
 118  */
 119 MLXSW_ITEM16_INDEXED(pci, wqe, byte_count, 0x02, 0, 14, 0x02, 0x00, false);
 120
 121 /* pci_wqe_address
 122  * Physical address of i-th scatter/gather entry.
 123  * Gather Entries must be 2Byte aligned.
 124  */
 125 MLXSW_ITEM64_INDEXED(pci, wqe, address, 0x08, 0, 64, 0x8, 0x0, false);
 126
 127 /* pci_cqe_lag
 128  * Packet arrives from a port which is a LAG
 129  */
 130 MLXSW_ITEM32(pci, cqe, lag, 0x00, 23, 1);
 131
 132 /* pci_cqe_system_port
 133  * When lag=0: System port on which the packet was received
 134  * When lag=1:
 135  * bits [15:4] LAG ID on which the packet was received
 136  * bits [3:0] sub_port on which the packet was received
 137  */
 138 MLXSW_ITEM32(pci, cqe, system_port, 0x00, 0, 16);
 139
 140 /* pci_cqe_wqe_counter
 141  * WQE count of the WQEs completed on the associated dqn
 142  */
 143 MLXSW_ITEM32(pci, cqe, wqe_counter, 0x04, 16, 16);
 144
 145 /* pci_cqe_byte_count
 146  * Byte count of received packets including additional two
 147  * Reserved Bytes that are append to the end of the frame.
 148  * Reserved for Send CQE.
 149  */
 150 MLXSW_ITEM32(pci, cqe, byte_count, 0x04, 0, 14);
 151
 152 /* pci_cqe_trap_id
 153  * Trap ID that captured the packet.
 154  */
 155 MLXSW_ITEM32(pci, cqe, trap_id, 0x08, 0, 8);
 156
 157 /* pci_cqe_crc
 158  * Length include CRC. Indicates the length field includes
 159  * the packet's CRC.
 160  */
 161 MLXSW_ITEM32(pci, cqe, crc, 0x0C, 8, 1);
 162
 163 /* pci_cqe_e
 164  * CQE with Error.
 165  */
 166 MLXSW_ITEM32(pci, cqe, e, 0x0C, 7, 1);
 167
 168 /* pci_cqe_sr
 169  * 1 - Send Queue
 170  * 0 - Receive Queue
 171  */
 172 MLXSW_ITEM32(pci, cqe, sr, 0x0C, 6, 1);
 173
 174 /* pci_cqe_dqn
 175  * Descriptor Queue (DQ) Number.
 176  */
 177 MLXSW_ITEM32(pci, cqe, dqn, 0x0C, 1, 5);
 178
 179 /* pci_cqe_owner
 180  * Ownership bit.
 181  */
 182 MLXSW_ITEM32(pci, cqe, owner, 0x0C, 0, 1);
 183
 184 /* pci_eqe_event_type
 185  * Event type.
 186  */
 187 MLXSW_ITEM32(pci, eqe, event_type, 0x0C, 24, 8);
 188 #define MLXSW_PCI_EQE_EVENT_TYPE_COMP   0x00
 189 #define MLXSW_PCI_EQE_EVENT_TYPE_CMD    0x0A
 190
 191 /* pci_eqe_event_sub_type
 192  * Event type.
 193  */
 194 MLXSW_ITEM32(pci, eqe, event_sub_type, 0x0C, 16, 8);
 195
 196 /* pci_eqe_cqn
 197  * Completion Queue that triggeret this EQE.
 198  */
 199 MLXSW_ITEM32(pci, eqe, cqn, 0x0C, 8, 7);
 200
 201 /* pci_eqe_owner
 202  * Ownership bit.
 203  */
 204 MLXSW_ITEM32(pci, eqe, owner, 0x0C, 0, 1);
 205
 206 /* pci_eqe_cmd_token
 207  * Command completion event - token
 208  */
 209 MLXSW_ITEM32(pci, eqe, cmd_token, 0x08, 16, 16);
 210
 211 /* pci_eqe_cmd_status
 212  * Command completion event - status
 213  */
 214 MLXSW_ITEM32(pci, eqe, cmd_status, 0x08, 0, 8);
 215
 216 /* pci_eqe_cmd_out_param_h
 217  * Command completion event - output parameter - higher part
 218  */
 219 MLXSW_ITEM32(pci, eqe, cmd_out_param_h, 0x0C, 0, 32);
 220
 221 /* pci_eqe_cmd_out_param_l
 222  * Command completion event - output parameter - lower part
 223  */
 224 MLXSW_ITEM32(pci, eqe, cmd_out_param_l, 0x10, 0, 32);
 225
 226 #endif