ceph/src/seastar/dpdk/drivers/net/liquidio/base/lio_mbox.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2017 Cavium, Inc
   3  */
   4
   5 #ifndef _LIO_MBOX_H_
   6 #define _LIO_MBOX_H_
   7
   8 #include <stdint.h>
   9
  10 #include <rte_spinlock.h>
  11
  12 /* Macros for Mail Box Communication */
  13
  14 #define LIO_MBOX_DATA_MAX                       32
  15
  16 #define LIO_VF_ACTIVE                           0x1
  17 #define LIO_VF_FLR_REQUEST                      0x2
  18 #define LIO_CORES_CRASHED                       0x3
  19
  20 /* Macro for Read acknowledgment */
  21 #define LIO_PFVFACK                             0xffffffffffffffff
  22 #define LIO_PFVFSIG                             0x1122334455667788
  23 #define LIO_PFVFERR                             0xDEADDEADDEADDEAD
  24
  25 enum lio_mbox_cmd_status {
  26         LIO_MBOX_STATUS_SUCCESS         = 0,
  27         LIO_MBOX_STATUS_FAILED          = 1,
  28         LIO_MBOX_STATUS_BUSY            = 2
  29 };
  30
  31 enum lio_mbox_message_type {
  32         LIO_MBOX_REQUEST        = 0,
  33         LIO_MBOX_RESPONSE       = 1
  34 };
  35
  36 union lio_mbox_message {
  37         uint64_t mbox_msg64;
  38         struct {
  39                 uint16_t type : 1;
  40                 uint16_t resp_needed : 1;
  41                 uint16_t cmd : 6;
  42                 uint16_t len : 8;
  43                 uint8_t params[6];
  44         } s;
  45 };
  46
  47 typedef void (*lio_mbox_callback)(void *, void *, void *);
  48
  49 struct lio_mbox_cmd {
  50         union lio_mbox_message msg;
  51         uint64_t data[LIO_MBOX_DATA_MAX];
  52         uint32_t q_no;
  53         uint32_t recv_len;
  54         uint32_t recv_status;
  55         lio_mbox_callback fn;
  56         void *fn_arg;
  57 };
  58
  59 enum lio_mbox_state {
  60         LIO_MBOX_STATE_IDLE             = 1,
  61         LIO_MBOX_STATE_REQ_RECEIVING    = 2,
  62         LIO_MBOX_STATE_REQ_RECEIVED     = 4,
  63         LIO_MBOX_STATE_RES_PENDING      = 8,
  64         LIO_MBOX_STATE_RES_RECEIVING    = 16,
  65         LIO_MBOX_STATE_RES_RECEIVED     = 16,
  66         LIO_MBOX_STATE_ERROR            = 32
  67 };
  68
  69 struct lio_mbox {
  70         /* A spinlock to protect access to this q_mbox. */
  71         rte_spinlock_t lock;
  72
  73         struct lio_device *lio_dev;
  74
  75         uint32_t q_no;
  76
  77         enum lio_mbox_state state;
  78
  79         /* SLI_MAC_PF_MBOX_INT for PF, SLI_PKT_MBOX_INT for VF. */
  80         void *mbox_int_reg;
  81
  82         /* SLI_PKT_PF_VF_MBOX_SIG(0) for PF,
  83          * SLI_PKT_PF_VF_MBOX_SIG(1) for VF.
  84          */
  85         void *mbox_write_reg;
  86
  87         /* SLI_PKT_PF_VF_MBOX_SIG(1) for PF,
  88          * SLI_PKT_PF_VF_MBOX_SIG(0) for VF.
  89          */
  90         void *mbox_read_reg;
  91
  92         struct lio_mbox_cmd mbox_req;
  93
  94         struct lio_mbox_cmd mbox_resp;
  95
  96 };
  97
  98 int lio_mbox_read(struct lio_mbox *mbox);
  99 int lio_mbox_write(struct lio_device *lio_dev,
 100                    struct lio_mbox_cmd *mbox_cmd);
 101 int lio_mbox_process_message(struct lio_mbox *mbox);
 102 #endif  /* _LIO_MBOX_H_ */