1// SPDX-License-Identifier: GPL-2.0
  2/* Copyright (C) 2021, Intel Corporation. */
  3
  4#include "ice_virtchnl_allowlist.h"
  5
  6/* Purpose of this file is to share functionality to allowlist or denylist
  7 * opcodes used in PF <-> VF communication. Group of opcodes:
  8 * - default -> should be always allowed after creating VF,
  9 *   default_allowlist_opcodes
 10 * - opcodes needed by VF to work correctly, but not associated with caps ->
 11 *   should be allowed after successful VF resources allocation,
 12 *   working_allowlist_opcodes
 13 * - opcodes needed by VF when caps are activated
 14 *
 15 * Caps that don't use new opcodes (no opcodes should be allowed):
 16 * - VIRTCHNL_VF_OFFLOAD_WB_ON_ITR
 17 * - VIRTCHNL_VF_OFFLOAD_CRC
 18 * - VIRTCHNL_VF_OFFLOAD_RX_POLLING
 19 * - VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2
 20 * - VIRTCHNL_VF_OFFLOAD_ENCAP
 21 * - VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM
 22 * - VIRTCHNL_VF_OFFLOAD_RX_ENCAP_CSUM
 23 * - VIRTCHNL_VF_OFFLOAD_USO
 24 */
 25
 26/* default opcodes to communicate with VF */
 27static const u32 default_allowlist_opcodes[] = {
 28	VIRTCHNL_OP_GET_VF_RESOURCES, VIRTCHNL_OP_VERSION, VIRTCHNL_OP_RESET_VF,
 29};
 30
 31/* opcodes supported after successful VIRTCHNL_OP_GET_VF_RESOURCES */
 32static const u32 working_allowlist_opcodes[] = {
 33	VIRTCHNL_OP_CONFIG_TX_QUEUE, VIRTCHNL_OP_CONFIG_RX_QUEUE,
 34	VIRTCHNL_OP_CONFIG_VSI_QUEUES, VIRTCHNL_OP_CONFIG_IRQ_MAP,
 35	VIRTCHNL_OP_ENABLE_QUEUES, VIRTCHNL_OP_DISABLE_QUEUES,
 36	VIRTCHNL_OP_GET_STATS, VIRTCHNL_OP_EVENT,
 37};
 38
 39/* VIRTCHNL_VF_OFFLOAD_L2 */
 40static const u32 l2_allowlist_opcodes[] = {
 41	VIRTCHNL_OP_ADD_ETH_ADDR, VIRTCHNL_OP_DEL_ETH_ADDR,
 42	VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE,
 43};
 44
 45/* VIRTCHNL_VF_OFFLOAD_REQ_QUEUES */
 46static const u32 req_queues_allowlist_opcodes[] = {
 47	VIRTCHNL_OP_REQUEST_QUEUES,
 48};
 49
 50/* VIRTCHNL_VF_OFFLOAD_VLAN */
 51static const u32 vlan_allowlist_opcodes[] = {
 52	VIRTCHNL_OP_ADD_VLAN, VIRTCHNL_OP_DEL_VLAN,
 53	VIRTCHNL_OP_ENABLE_VLAN_STRIPPING, VIRTCHNL_OP_DISABLE_VLAN_STRIPPING,
 54};
 55
 56/* VIRTCHNL_VF_OFFLOAD_VLAN_V2 */
 57static const u32 vlan_v2_allowlist_opcodes[] = {
 58	VIRTCHNL_OP_GET_OFFLOAD_VLAN_V2_CAPS, VIRTCHNL_OP_ADD_VLAN_V2,
 59	VIRTCHNL_OP_DEL_VLAN_V2, VIRTCHNL_OP_ENABLE_VLAN_STRIPPING_V2,
 60	VIRTCHNL_OP_DISABLE_VLAN_STRIPPING_V2,
 61	VIRTCHNL_OP_ENABLE_VLAN_INSERTION_V2,
 62	VIRTCHNL_OP_DISABLE_VLAN_INSERTION_V2,
 63};
 64
 65/* VIRTCHNL_VF_OFFLOAD_RSS_PF */
 66static const u32 rss_pf_allowlist_opcodes[] = {
 67	VIRTCHNL_OP_CONFIG_RSS_KEY, VIRTCHNL_OP_CONFIG_RSS_LUT,
 68	VIRTCHNL_OP_GET_RSS_HENA_CAPS, VIRTCHNL_OP_SET_RSS_HENA,
 69	VIRTCHNL_OP_CONFIG_RSS_HFUNC,
 70};
 71
 72/* VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC */
 73static const u32 rx_flex_desc_allowlist_opcodes[] = {
 74	VIRTCHNL_OP_GET_SUPPORTED_RXDIDS,
 75};
 76
 77/* VIRTCHNL_VF_OFFLOAD_ADV_RSS_PF */
 78static const u32 adv_rss_pf_allowlist_opcodes[] = {
 79	VIRTCHNL_OP_ADD_RSS_CFG, VIRTCHNL_OP_DEL_RSS_CFG,
 80};
 81
 82/* VIRTCHNL_VF_OFFLOAD_FDIR_PF */
 83static const u32 fdir_pf_allowlist_opcodes[] = {
 84	VIRTCHNL_OP_ADD_FDIR_FILTER, VIRTCHNL_OP_DEL_FDIR_FILTER,
 85};
 86
 87struct allowlist_opcode_info {
 88	const u32 *opcodes;
 89	size_t size;
 90};
 91
 92#define BIT_INDEX(caps) (HWEIGHT((caps) - 1))
 93#define ALLOW_ITEM(caps, list) \
 94	[BIT_INDEX(caps)] = { \
 95		.opcodes = list, \
 96		.size = ARRAY_SIZE(list) \
 97	}
 98static const struct allowlist_opcode_info allowlist_opcodes[] = {
 99	ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_L2, l2_allowlist_opcodes),
100	ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_REQ_QUEUES, req_queues_allowlist_opcodes),
101	ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_VLAN, vlan_allowlist_opcodes),
102	ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_RSS_PF, rss_pf_allowlist_opcodes),
103	ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC, rx_flex_desc_allowlist_opcodes),
104	ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_ADV_RSS_PF, adv_rss_pf_allowlist_opcodes),
105	ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_FDIR_PF, fdir_pf_allowlist_opcodes),
106	ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_VLAN_V2, vlan_v2_allowlist_opcodes),
107};
108
109/**
110 * ice_vc_is_opcode_allowed - check if this opcode is allowed on this VF
111 * @vf: pointer to VF structure
112 * @opcode: virtchnl opcode
113 *
114 * Return true if message is allowed on this VF
115 */
116bool ice_vc_is_opcode_allowed(struct ice_vf *vf, u32 opcode)
117{
118	if (opcode >= VIRTCHNL_OP_MAX)
119		return false;
120
121	return test_bit(opcode, vf->opcodes_allowlist);
122}
123
124/**
125 * ice_vc_allowlist_opcodes - allowlist selected opcodes
126 * @vf: pointer to VF structure
127 * @opcodes: array of opocodes to allowlist
128 * @size: size of opcodes array
129 *
130 * Function should be called to allowlist opcodes on VF.
131 */
132static void
133ice_vc_allowlist_opcodes(struct ice_vf *vf, const u32 *opcodes, size_t size)
134{
135	unsigned int i;
136
137	for (i = 0; i < size; i++)
138		set_bit(opcodes[i], vf->opcodes_allowlist);
139}
140
141/**
142 * ice_vc_clear_allowlist - clear all allowlist opcodes
143 * @vf: pointer to VF structure
144 */
145static void ice_vc_clear_allowlist(struct ice_vf *vf)
146{
147	bitmap_zero(vf->opcodes_allowlist, VIRTCHNL_OP_MAX);
148}
149
150/**
151 * ice_vc_set_default_allowlist - allowlist default opcodes for VF
152 * @vf: pointer to VF structure
153 */
154void ice_vc_set_default_allowlist(struct ice_vf *vf)
155{
156	ice_vc_clear_allowlist(vf);
157	ice_vc_allowlist_opcodes(vf, default_allowlist_opcodes,
158				 ARRAY_SIZE(default_allowlist_opcodes));
159}
160
161/**
162 * ice_vc_set_working_allowlist - allowlist opcodes needed to by VF to work
163 * @vf: pointer to VF structure
164 *
165 * allowlist opcodes that aren't associated with specific caps, but
166 * are needed by VF to work.
167 */
168void ice_vc_set_working_allowlist(struct ice_vf *vf)
169{
170	ice_vc_allowlist_opcodes(vf, working_allowlist_opcodes,
171				 ARRAY_SIZE(working_allowlist_opcodes));
172}
173
174/**
175 * ice_vc_set_caps_allowlist - allowlist VF opcodes according caps
176 * @vf: pointer to VF structure
177 */
178void ice_vc_set_caps_allowlist(struct ice_vf *vf)
179{
180	unsigned long caps = vf->driver_caps;
181	unsigned int i;
182
183	for_each_set_bit(i, &caps, ARRAY_SIZE(allowlist_opcodes))
184		ice_vc_allowlist_opcodes(vf, allowlist_opcodes[i].opcodes,
185					 allowlist_opcodes[i].size);
186}