1/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
  2/* Copyright (C) 2018 Netronome Systems, Inc. */
  3
  4#ifndef __NFP_ABI__
  5#define __NFP_ABI__ 1
  6
  7#include <linux/types.h>
  8
  9#define NFP_MBOX_SYM_NAME		"_abi_nfd_pf%u_mbox"
 10#define NFP_MBOX_SYM_MIN_SIZE		16 /* When no data needed */
 11
 12#define NFP_MBOX_CMD		0x00
 13#define NFP_MBOX_RET		0x04
 14#define NFP_MBOX_DATA_LEN	0x08
 15#define NFP_MBOX_RESERVED	0x0c
 16#define NFP_MBOX_DATA		0x10
 17
 18/**
 19 * enum nfp_mbox_cmd - PF mailbox commands
 20 *
 21 * @NFP_MBOX_NO_CMD:	null command
 22 * Used to indicate previous command has finished.
 23 *
 24 * @NFP_MBOX_POOL_GET:	get shared buffer pool info/config
 25 * Input  - struct nfp_shared_buf_pool_id
 26 * Output - struct nfp_shared_buf_pool_info_get
 27 *
 28 * @NFP_MBOX_POOL_SET:	set shared buffer pool info/config
 29 * Input  - struct nfp_shared_buf_pool_info_set
 30 * Output - None
 31 *
 32 * @NFP_MBOX_PCIE_ABM_ENABLE:	enable PCIe-side advanced buffer management
 33 * Enable advanced buffer management of the PCIe block.  If ABM is disabled
 34 * PCIe block maintains a very short queue of buffers and does tail drop.
 35 * ABM allows more advanced buffering and priority control.
 36 * Input  - None
 37 * Output - None
 38 *
 39 * @NFP_MBOX_PCIE_ABM_DISABLE:	disable PCIe-side advanced buffer management
 40 * Input  - None
 41 * Output - None
 42 */
 43enum nfp_mbox_cmd {
 44	NFP_MBOX_NO_CMD			= 0x00,
 45
 46	NFP_MBOX_POOL_GET		= 0x01,
 47	NFP_MBOX_POOL_SET		= 0x02,
 48
 49	NFP_MBOX_PCIE_ABM_ENABLE	= 0x03,
 50	NFP_MBOX_PCIE_ABM_DISABLE	= 0x04,
 51};
 52
 53#define NFP_SHARED_BUF_COUNT_SYM_NAME	"_abi_nfd_pf%u_sb_cnt"
 54#define NFP_SHARED_BUF_TABLE_SYM_NAME	"_abi_nfd_pf%u_sb_tbl"
 55
 56/**
 57 * struct nfp_shared_buf - NFP shared buffer description
 58 * @id:				numerical user-visible id of the shared buffer
 59 * @size:			size in bytes of the buffer
 60 * @ingress_pools_count:	number of ingress pools
 61 * @egress_pools_count:		number of egress pools
 62 * @ingress_tc_count:		number of ingress trafic classes
 63 * @egress_tc_count:		number of egress trafic classes
 64 * @pool_size_unit:		pool size may be in credits, each credit is
 65 *				@pool_size_unit bytes
 66 */
 67struct nfp_shared_buf {
 68	__le32 id;
 69	__le32 size;
 70	__le16 ingress_pools_count;
 71	__le16 egress_pools_count;
 72	__le16 ingress_tc_count;
 73	__le16 egress_tc_count;
 74
 75	__le32 pool_size_unit;
 76};
 77
 78/**
 79 * struct nfp_shared_buf_pool_id - shared buffer pool identification
 80 * @shared_buf:		shared buffer id
 81 * @pool:		pool index
 82 */
 83struct nfp_shared_buf_pool_id {
 84	__le32 shared_buf;
 85	__le32 pool;
 86};
 87
 88/**
 89 * struct nfp_shared_buf_pool_info_get - struct devlink_sb_pool_info mirror
 90 * @pool_type:		one of enum devlink_sb_pool_type
 91 * @size:		pool size in units of SB's @pool_size_unit
 92 * @threshold_type:	one of enum devlink_sb_threshold_type
 93 */
 94struct nfp_shared_buf_pool_info_get {
 95	__le32 pool_type;
 96	__le32 size;
 97	__le32 threshold_type;
 98};
 99
100/**
101 * struct nfp_shared_buf_pool_info_set - packed args of sb_pool_set
102 * @id:			pool identification info
103 * @size:		pool size in units of SB's @pool_size_unit
104 * @threshold_type:	one of enum devlink_sb_threshold_type
105 */
106struct nfp_shared_buf_pool_info_set {
107	struct nfp_shared_buf_pool_id id;
108	__le32 size;
109	__le32 threshold_type;
110};
111
112#endif