1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright (c) Meta Platforms, Inc. and affiliates. */ 3 4 #ifndef _FBNIC_RPC_H_ 5 #define _FBNIC_RPC_H_ 6 7 #include <uapi/linux/in6.h> 8 #include <linux/bitfield.h> 9 10 /* The TCAM state definitions follow an expected ordering. 11 * They start out disabled, then move through the following states: 12 * Disabled 0 -> Add 2 13 * Add 2 -> Valid 1 14 * 15 * Valid 1 -> Add/Update 2 16 * Add 2 -> Valid 1 17 * 18 * Valid 1 -> Delete 3 19 * Delete 3 -> Disabled 0 20 */ 21 enum { 22 FBNIC_TCAM_S_DISABLED = 0, 23 FBNIC_TCAM_S_VALID = 1, 24 FBNIC_TCAM_S_ADD = 2, 25 FBNIC_TCAM_S_UPDATE = FBNIC_TCAM_S_ADD, 26 FBNIC_TCAM_S_DELETE = 3, 27 }; 28 29 /* 32 MAC Destination Address TCAM Entries 30 * 4 registers DA[1:0], DA[3:2], DA[5:4], Validate 31 */ 32 #define FBNIC_RPC_TCAM_MACDA_WORD_LEN 3 33 #define FBNIC_RPC_TCAM_MACDA_NUM_ENTRIES 32 34 35 #define FBNIC_RPC_TCAM_ACT_WORD_LEN 11 36 #define FBNIC_RPC_TCAM_ACT_NUM_ENTRIES 64 37 38 struct fbnic_mac_addr { 39 union { 40 unsigned char addr8[ETH_ALEN]; 41 __be16 addr16[FBNIC_RPC_TCAM_MACDA_WORD_LEN]; 42 } mask, value; 43 unsigned char state; 44 DECLARE_BITMAP(act_tcam, FBNIC_RPC_TCAM_ACT_NUM_ENTRIES); 45 }; 46 47 struct fbnic_act_tcam { 48 struct { 49 u16 tcam[FBNIC_RPC_TCAM_ACT_WORD_LEN]; 50 } mask, value; 51 unsigned char state; 52 u16 rss_en_mask; 53 u32 dest; 54 }; 55 56 enum { 57 FBNIC_RSS_EN_HOST_UDP6, 58 FBNIC_RSS_EN_HOST_UDP4, 59 FBNIC_RSS_EN_HOST_TCP6, 60 FBNIC_RSS_EN_HOST_TCP4, 61 FBNIC_RSS_EN_HOST_IP6, 62 FBNIC_RSS_EN_HOST_IP4, 63 FBNIC_RSS_EN_HOST_ETHER, 64 FBNIC_RSS_EN_XCAST_UDP6, 65 #define FBNIC_RSS_EN_NUM_UNICAST FBNIC_RSS_EN_XCAST_UDP6 66 FBNIC_RSS_EN_XCAST_UDP4, 67 FBNIC_RSS_EN_XCAST_TCP6, 68 FBNIC_RSS_EN_XCAST_TCP4, 69 FBNIC_RSS_EN_XCAST_IP6, 70 FBNIC_RSS_EN_XCAST_IP4, 71 FBNIC_RSS_EN_XCAST_ETHER, 72 FBNIC_RSS_EN_NUM_ENTRIES 73 }; 74 75 /* Reserve the first 2 entries for the use by the BMC so that we can 76 * avoid allowing rules to get in the way of BMC unicast traffic. 77 */ 78 #define FBNIC_RPC_ACT_TBL_BMC_OFFSET 0 79 #define FBNIC_RPC_ACT_TBL_BMC_ALL_MULTI_OFFSET 1 80 81 /* We reserve the last 14 entries for RSS rules on the host. The BMC 82 * unicast rule will need to be populated above these and is expected to 83 * use MACDA TCAM entry 23 to store the BMC MAC address. 84 */ 85 #define FBNIC_RPC_ACT_TBL_RSS_OFFSET \ 86 (FBNIC_RPC_ACT_TBL_NUM_ENTRIES - FBNIC_RSS_EN_NUM_ENTRIES) 87 88 /* Flags used to identify the owner for this MAC filter. Note that any 89 * flags set for Broadcast thru Promisc indicate that the rule belongs 90 * to the RSS filters for the host. 91 */ 92 enum { 93 FBNIC_MAC_ADDR_T_BMC = 0, 94 FBNIC_MAC_ADDR_T_BROADCAST = FBNIC_RPC_ACT_TBL_RSS_OFFSET, 95 #define FBNIC_MAC_ADDR_T_HOST_START FBNIC_MAC_ADDR_T_BROADCAST 96 FBNIC_MAC_ADDR_T_MULTICAST, 97 FBNIC_MAC_ADDR_T_UNICAST, 98 FBNIC_MAC_ADDR_T_ALLMULTI, /* BROADCAST ... MULTICAST*/ 99 FBNIC_MAC_ADDR_T_PROMISC, /* BROADCAST ... UNICAST */ 100 FBNIC_MAC_ADDR_T_HOST_LAST 101 }; 102 103 #define FBNIC_MAC_ADDR_T_HOST_LEN \ 104 (FBNIC_MAC_ADDR_T_HOST_LAST - FBNIC_MAC_ADDR_T_HOST_START) 105 106 #define FBNIC_RPC_TCAM_ACT0_IPSRC_IDX CSR_GENMASK(2, 0) 107 #define FBNIC_RPC_TCAM_ACT0_IPSRC_VALID CSR_BIT(3) 108 #define FBNIC_RPC_TCAM_ACT0_IPDST_IDX CSR_GENMASK(6, 4) 109 #define FBNIC_RPC_TCAM_ACT0_IPDST_VALID CSR_BIT(7) 110 #define FBNIC_RPC_TCAM_ACT0_OUTER_IPSRC_IDX CSR_GENMASK(10, 8) 111 #define FBNIC_RPC_TCAM_ACT0_OUTER_IPSRC_VALID CSR_BIT(11) 112 #define FBNIC_RPC_TCAM_ACT0_OUTER_IPDST_IDX CSR_GENMASK(14, 12) 113 #define FBNIC_RPC_TCAM_ACT0_OUTER_IPDST_VALID CSR_BIT(15) 114 115 #define FBNIC_RPC_TCAM_ACT1_L2_MACDA_IDX CSR_GENMASK(9, 5) 116 #define FBNIC_RPC_TCAM_ACT1_L2_MACDA_VALID CSR_BIT(10) 117 #define FBNIC_RPC_TCAM_ACT1_IP_IS_V6 CSR_BIT(11) 118 #define FBNIC_RPC_TCAM_ACT1_IP_VALID CSR_BIT(12) 119 #define FBNIC_RPC_TCAM_ACT1_OUTER_IP_VALID CSR_BIT(13) 120 #define FBNIC_RPC_TCAM_ACT1_L4_IS_UDP CSR_BIT(14) 121 #define FBNIC_RPC_TCAM_ACT1_L4_VALID CSR_BIT(15) 122 123 /* TCAM 0 - 3 reserved for BMC MAC addresses */ 124 #define FBNIC_RPC_TCAM_MACDA_BMC_ADDR_IDX 0 125 /* TCAM 4 reserved for broadcast MAC address */ 126 #define FBNIC_RPC_TCAM_MACDA_BROADCAST_IDX 4 127 /* TCAMs 5 - 30 will be used for multicast and unicast addresses. The 128 * boundary between the two can be variable it is currently set to 24 129 * on which the unicast addresses start. The general idea is that we will 130 * always go top-down with unicast, and bottom-up with multicast so that 131 * there should be free-space in the middle between the two. 132 * 133 * The entry at MADCA_DEFAULT_BOUNDARY is a special case as it can be used 134 * for the ALL MULTI address if the list is full, or the BMC has requested 135 * it. 136 */ 137 #define FBNIC_RPC_TCAM_MACDA_MULTICAST_IDX 5 138 #define FBNIC_RPC_TCAM_MACDA_DEFAULT_BOUNDARY 24 139 #define FBNIC_RPC_TCAM_MACDA_HOST_ADDR_IDX 30 140 /* Reserved for use to record Multicast promisc, or Promiscuous */ 141 #define FBNIC_RPC_TCAM_MACDA_PROMISC_IDX 31 142 143 enum { 144 FBNIC_UDP6_HASH_OPT, 145 FBNIC_UDP4_HASH_OPT, 146 FBNIC_TCP6_HASH_OPT, 147 FBNIC_TCP4_HASH_OPT, 148 #define FBNIC_L4_HASH_OPT FBNIC_TCP4_HASH_OPT 149 FBNIC_IPV6_HASH_OPT, 150 FBNIC_IPV4_HASH_OPT, 151 #define FBNIC_IP_HASH_OPT FBNIC_IPV4_HASH_OPT 152 FBNIC_ETHER_HASH_OPT, 153 FBNIC_NUM_HASH_OPT, 154 }; 155 156 struct fbnic_dev; 157 struct fbnic_net; 158 159 void fbnic_bmc_rpc_init(struct fbnic_dev *fbd); 160 void fbnic_bmc_rpc_all_multi_config(struct fbnic_dev *fbd, bool enable_host); 161 162 void fbnic_reset_indir_tbl(struct fbnic_net *fbn); 163 void fbnic_rss_key_fill(u32 *buffer); 164 void fbnic_rss_init_en_mask(struct fbnic_net *fbn); 165 void fbnic_rss_disable_hw(struct fbnic_dev *fbd); 166 void fbnic_rss_reinit_hw(struct fbnic_dev *fbd, struct fbnic_net *fbn); 167 void fbnic_rss_reinit(struct fbnic_dev *fbd, struct fbnic_net *fbn); 168 169 int __fbnic_xc_unsync(struct fbnic_mac_addr *mac_addr, unsigned int tcam_idx); 170 struct fbnic_mac_addr *__fbnic_uc_sync(struct fbnic_dev *fbd, 171 const unsigned char *addr); 172 struct fbnic_mac_addr *__fbnic_mc_sync(struct fbnic_dev *fbd, 173 const unsigned char *addr); 174 void fbnic_sift_macda(struct fbnic_dev *fbd); 175 void fbnic_write_macda(struct fbnic_dev *fbd); 176 177 static inline int __fbnic_uc_unsync(struct fbnic_mac_addr *mac_addr) 178 { 179 return __fbnic_xc_unsync(mac_addr, FBNIC_MAC_ADDR_T_UNICAST); 180 } 181 182 static inline int __fbnic_mc_unsync(struct fbnic_mac_addr *mac_addr) 183 { 184 return __fbnic_xc_unsync(mac_addr, FBNIC_MAC_ADDR_T_MULTICAST); 185 } 186 187 void fbnic_clear_rules(struct fbnic_dev *fbd); 188 void fbnic_write_rules(struct fbnic_dev *fbd); 189 #endif /* _FBNIC_RPC_H_ */ 190