drivers/net/ethernet/cavium/liquidio/octeon_mailbox.h

   1 /**********************************************************************
   2  * Author: Cavium, Inc.
   3  *
   4  * Contact: support@cavium.com
   5  *          Please include "LiquidIO" in the subject.
   6  *
   7  * Copyright (c) 2003-2016 Cavium, Inc.
   8  *
   9  * This file is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License, Version 2, as
  11  * published by the Free Software Foundation.
  12  *
  13  * This file is distributed in the hope that it will be useful, but
  14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
  15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
  16  * NONINFRINGEMENT.  See the GNU General Public License for more details.
  17  ***********************************************************************/
  18 #ifndef __MAILBOX_H__
  19 #define __MAILBOX_H__
  20
  21 /* Macros for Mail Box Communication */
  22
  23 #define OCTEON_MBOX_DATA_MAX            32
  24
  25 #define OCTEON_VF_ACTIVE                0x1
  26 #define OCTEON_VF_FLR_REQUEST           0x2
  27 #define OCTEON_PF_CHANGED_VF_MACADDR    0x4
  28
  29 /*Macro for Read acknowldgement*/
  30 #define OCTEON_PFVFACK                  0xffffffffffffffffULL
  31 #define OCTEON_PFVFSIG                  0x1122334455667788ULL
  32 #define OCTEON_PFVFERR                  0xDEADDEADDEADDEADULL
  33
  34 #define LIO_MBOX_WRITE_WAIT_CNT         1000
  35 #define LIO_MBOX_WRITE_WAIT_TIME        msecs_to_jiffies(1)
  36
  37 enum octeon_mbox_cmd_status {
  38         OCTEON_MBOX_STATUS_SUCCESS = 0,
  39         OCTEON_MBOX_STATUS_FAILED = 1,
  40         OCTEON_MBOX_STATUS_BUSY = 2
  41 };
  42
  43 enum octeon_mbox_message_type {
  44         OCTEON_MBOX_REQUEST = 0,
  45         OCTEON_MBOX_RESPONSE = 1
  46 };
  47
  48 union octeon_mbox_message {
  49         u64 u64;
  50         struct {
  51                 u16 type : 1;
  52                 u16 resp_needed : 1;
  53                 u16 cmd : 6;
  54                 u16 len : 8;
  55                 u8 params[6];
  56         } s;
  57 };
  58
  59 typedef void (*octeon_mbox_callback_t)(void *, void *, void *);
  60
  61 struct octeon_mbox_cmd {
  62         union octeon_mbox_message msg;
  63         u64 data[OCTEON_MBOX_DATA_MAX];
  64         u32 q_no;
  65         u32 recv_len;
  66         u32 recv_status;
  67         octeon_mbox_callback_t fn;
  68         void *fn_arg;
  69 };
  70
  71 enum octeon_mbox_state {
  72         OCTEON_MBOX_STATE_IDLE = 1,
  73         OCTEON_MBOX_STATE_REQUEST_RECEIVING = 2,
  74         OCTEON_MBOX_STATE_REQUEST_RECEIVED = 4,
  75         OCTEON_MBOX_STATE_RESPONSE_PENDING = 8,
  76         OCTEON_MBOX_STATE_RESPONSE_RECEIVING = 16,
  77         OCTEON_MBOX_STATE_RESPONSE_RECEIVED = 32,
  78         OCTEON_MBOX_STATE_ERROR = 64
  79 };
  80
  81 struct octeon_mbox {
  82         /** A spinlock to protect access to this q_mbox. */
  83         spinlock_t lock;
  84
  85         struct octeon_device *oct_dev;
  86
  87         u32 q_no;
  88
  89         enum octeon_mbox_state state;
  90
  91         struct cavium_wk mbox_poll_wk;
  92
  93         /** SLI_MAC_PF_MBOX_INT for PF, SLI_PKT_MBOX_INT for VF. */
  94         void *mbox_int_reg;
  95
  96         /** SLI_PKT_PF_VF_MBOX_SIG(0) for PF, SLI_PKT_PF_VF_MBOX_SIG(1) for VF.
  97          */
  98         void *mbox_write_reg;
  99
 100         /** SLI_PKT_PF_VF_MBOX_SIG(1) for PF, SLI_PKT_PF_VF_MBOX_SIG(0) for VF.
 101          */
 102         void *mbox_read_reg;
 103
 104         struct octeon_mbox_cmd mbox_req;
 105
 106         struct octeon_mbox_cmd mbox_resp;
 107
 108 };
 109
 110 int octeon_mbox_read(struct octeon_mbox *mbox);
 111 int octeon_mbox_write(struct octeon_device *oct,
 112                       struct octeon_mbox_cmd *mbox_cmd);
 113 int octeon_mbox_process_message(struct octeon_mbox *mbox);
 114
 115 #endif