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_RSS_AQ 17 * - VIRTCHNL_VF_OFFLOAD_RSS_REG 18 * - VIRTCHNL_VF_OFFLOAD_WB_ON_ITR 19 * - VIRTCHNL_VF_OFFLOAD_CRC 20 * - VIRTCHNL_VF_OFFLOAD_RX_POLLING 21 * - VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2 22 * - VIRTCHNL_VF_OFFLOAD_ENCAP 23 * - VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM 24 * - VIRTCHNL_VF_OFFLOAD_RX_ENCAP_CSUM 25 * - VIRTCHNL_VF_OFFLOAD_USO 26 */ 27 28 /* default opcodes to communicate with VF */ 29 static const u32 default_allowlist_opcodes[] = { 30 VIRTCHNL_OP_GET_VF_RESOURCES, VIRTCHNL_OP_VERSION, VIRTCHNL_OP_RESET_VF, 31 }; 32 33 /* opcodes supported after successful VIRTCHNL_OP_GET_VF_RESOURCES */ 34 static const u32 working_allowlist_opcodes[] = { 35 VIRTCHNL_OP_CONFIG_TX_QUEUE, VIRTCHNL_OP_CONFIG_RX_QUEUE, 36 VIRTCHNL_OP_CONFIG_VSI_QUEUES, VIRTCHNL_OP_CONFIG_IRQ_MAP, 37 VIRTCHNL_OP_ENABLE_QUEUES, VIRTCHNL_OP_DISABLE_QUEUES, 38 VIRTCHNL_OP_GET_STATS, VIRTCHNL_OP_EVENT, 39 }; 40 41 /* VIRTCHNL_VF_OFFLOAD_L2 */ 42 static const u32 l2_allowlist_opcodes[] = { 43 VIRTCHNL_OP_ADD_ETH_ADDR, VIRTCHNL_OP_DEL_ETH_ADDR, 44 VIRTCHNL_OP_CONFIG_PROMISCUOUS_MODE, 45 }; 46 47 /* VIRTCHNL_VF_OFFLOAD_REQ_QUEUES */ 48 static const u32 req_queues_allowlist_opcodes[] = { 49 VIRTCHNL_OP_REQUEST_QUEUES, 50 }; 51 52 /* VIRTCHNL_VF_OFFLOAD_VLAN */ 53 static const u32 vlan_allowlist_opcodes[] = { 54 VIRTCHNL_OP_ADD_VLAN, VIRTCHNL_OP_DEL_VLAN, 55 VIRTCHNL_OP_ENABLE_VLAN_STRIPPING, VIRTCHNL_OP_DISABLE_VLAN_STRIPPING, 56 }; 57 58 /* VIRTCHNL_VF_OFFLOAD_VLAN_V2 */ 59 static const u32 vlan_v2_allowlist_opcodes[] = { 60 VIRTCHNL_OP_GET_OFFLOAD_VLAN_V2_CAPS, VIRTCHNL_OP_ADD_VLAN_V2, 61 VIRTCHNL_OP_DEL_VLAN_V2, VIRTCHNL_OP_ENABLE_VLAN_STRIPPING_V2, 62 VIRTCHNL_OP_DISABLE_VLAN_STRIPPING_V2, 63 VIRTCHNL_OP_ENABLE_VLAN_INSERTION_V2, 64 VIRTCHNL_OP_DISABLE_VLAN_INSERTION_V2, 65 }; 66 67 /* VIRTCHNL_VF_OFFLOAD_RSS_PF */ 68 static const u32 rss_pf_allowlist_opcodes[] = { 69 VIRTCHNL_OP_CONFIG_RSS_KEY, VIRTCHNL_OP_CONFIG_RSS_LUT, 70 VIRTCHNL_OP_GET_RSS_HENA_CAPS, VIRTCHNL_OP_SET_RSS_HENA, 71 }; 72 73 /* VIRTCHNL_VF_OFFLOAD_ADV_RSS_PF */ 74 static const u32 adv_rss_pf_allowlist_opcodes[] = { 75 VIRTCHNL_OP_ADD_RSS_CFG, VIRTCHNL_OP_DEL_RSS_CFG, 76 }; 77 78 /* VIRTCHNL_VF_OFFLOAD_FDIR_PF */ 79 static const u32 fdir_pf_allowlist_opcodes[] = { 80 VIRTCHNL_OP_ADD_FDIR_FILTER, VIRTCHNL_OP_DEL_FDIR_FILTER, 81 }; 82 83 struct allowlist_opcode_info { 84 const u32 *opcodes; 85 size_t size; 86 }; 87 88 #define BIT_INDEX(caps) (HWEIGHT((caps) - 1)) 89 #define ALLOW_ITEM(caps, list) \ 90 [BIT_INDEX(caps)] = { \ 91 .opcodes = list, \ 92 .size = ARRAY_SIZE(list) \ 93 } 94 static const struct allowlist_opcode_info allowlist_opcodes[] = { 95 ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_L2, l2_allowlist_opcodes), 96 ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_REQ_QUEUES, req_queues_allowlist_opcodes), 97 ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_VLAN, vlan_allowlist_opcodes), 98 ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_RSS_PF, rss_pf_allowlist_opcodes), 99 ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_ADV_RSS_PF, adv_rss_pf_allowlist_opcodes), 100 ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_FDIR_PF, fdir_pf_allowlist_opcodes), 101 ALLOW_ITEM(VIRTCHNL_VF_OFFLOAD_VLAN_V2, vlan_v2_allowlist_opcodes), 102 }; 103 104 /** 105 * ice_vc_is_opcode_allowed - check if this opcode is allowed on this VF 106 * @vf: pointer to VF structure 107 * @opcode: virtchnl opcode 108 * 109 * Return true if message is allowed on this VF 110 */ 111 bool ice_vc_is_opcode_allowed(struct ice_vf *vf, u32 opcode) 112 { 113 if (opcode >= VIRTCHNL_OP_MAX) 114 return false; 115 116 return test_bit(opcode, vf->opcodes_allowlist); 117 } 118 119 /** 120 * ice_vc_allowlist_opcodes - allowlist selected opcodes 121 * @vf: pointer to VF structure 122 * @opcodes: array of opocodes to allowlist 123 * @size: size of opcodes array 124 * 125 * Function should be called to allowlist opcodes on VF. 126 */ 127 static void 128 ice_vc_allowlist_opcodes(struct ice_vf *vf, const u32 *opcodes, size_t size) 129 { 130 unsigned int i; 131 132 for (i = 0; i < size; i++) 133 set_bit(opcodes[i], vf->opcodes_allowlist); 134 } 135 136 /** 137 * ice_vc_clear_allowlist - clear all allowlist opcodes 138 * @vf: pointer to VF structure 139 */ 140 static void ice_vc_clear_allowlist(struct ice_vf *vf) 141 { 142 bitmap_zero(vf->opcodes_allowlist, VIRTCHNL_OP_MAX); 143 } 144 145 /** 146 * ice_vc_set_default_allowlist - allowlist default opcodes for VF 147 * @vf: pointer to VF structure 148 */ 149 void ice_vc_set_default_allowlist(struct ice_vf *vf) 150 { 151 ice_vc_clear_allowlist(vf); 152 ice_vc_allowlist_opcodes(vf, default_allowlist_opcodes, 153 ARRAY_SIZE(default_allowlist_opcodes)); 154 } 155 156 /** 157 * ice_vc_set_working_allowlist - allowlist opcodes needed to by VF to work 158 * @vf: pointer to VF structure 159 * 160 * allowlist opcodes that aren't associated with specific caps, but 161 * are needed by VF to work. 162 */ 163 void ice_vc_set_working_allowlist(struct ice_vf *vf) 164 { 165 ice_vc_allowlist_opcodes(vf, working_allowlist_opcodes, 166 ARRAY_SIZE(working_allowlist_opcodes)); 167 } 168 169 /** 170 * ice_vc_set_caps_allowlist - allowlist VF opcodes according caps 171 * @vf: pointer to VF structure 172 */ 173 void ice_vc_set_caps_allowlist(struct ice_vf *vf) 174 { 175 unsigned long caps = vf->driver_caps; 176 unsigned int i; 177 178 for_each_set_bit(i, &caps, ARRAY_SIZE(allowlist_opcodes)) 179 ice_vc_allowlist_opcodes(vf, allowlist_opcodes[i].opcodes, 180 allowlist_opcodes[i].size); 181 } 182