1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2014-2021 Broadcom 3 * All rights reserved. 4 */ 5 6 #include "ulp_matcher.h" 7 #include "ulp_utils.h" 8 9 /* Utility function to calculate the class matcher hash */ 10 static uint32_t 11 ulp_matcher_class_hash_calculate(uint64_t hi_sig, uint64_t lo_sig) 12 { 13 uint64_t hash; 14 15 hi_sig |= ((hi_sig % BNXT_ULP_CLASS_HID_HIGH_PRIME) << 16 BNXT_ULP_CLASS_HID_SHFTL); 17 lo_sig |= ((lo_sig % BNXT_ULP_CLASS_HID_LOW_PRIME) << 18 (BNXT_ULP_CLASS_HID_SHFTL + 2)); 19 hash = hi_sig ^ lo_sig; 20 hash = (hash >> BNXT_ULP_CLASS_HID_SHFTR) & BNXT_ULP_CLASS_HID_MASK; 21 return (uint32_t)hash; 22 } 23 24 /* Utility function to calculate the action matcher hash */ 25 static uint32_t 26 ulp_matcher_action_hash_calculate(uint64_t hi_sig, uint64_t app_id) 27 { 28 uint64_t hash; 29 30 hi_sig |= ((hi_sig % BNXT_ULP_ACT_HID_HIGH_PRIME) << 31 BNXT_ULP_ACT_HID_SHFTL); 32 app_id |= ((app_id % BNXT_ULP_CLASS_HID_LOW_PRIME) << 33 (BNXT_ULP_CLASS_HID_SHFTL + 2)); 34 hash = hi_sig ^ app_id; 35 hash = (hash >> BNXT_ULP_ACT_HID_SHFTR) & BNXT_ULP_ACT_HID_MASK; 36 return (uint32_t)hash; 37 } 38 39 /* 40 * Function to handle the matching of RTE Flows and validating 41 * the pattern masks against the flow templates. 42 */ 43 int32_t 44 ulp_matcher_pattern_match(struct ulp_rte_parser_params *params, 45 uint32_t *class_id) 46 { 47 struct bnxt_ulp_class_match_info *class_match; 48 uint32_t class_hid; 49 uint8_t vf_to_vf; 50 uint16_t tmpl_id; 51 52 /* Get vf to vf flow */ 53 vf_to_vf = ULP_COMP_FLD_IDX_RD(params, BNXT_ULP_CF_IDX_VF_TO_VF); 54 55 /* calculate the hash of the given flow */ 56 class_hid = ulp_matcher_class_hash_calculate((params->hdr_bitmap.bits ^ 57 params->app_id), 58 params->fld_s_bitmap.bits); 59 60 /* validate the calculate hash values */ 61 if (class_hid >= BNXT_ULP_CLASS_SIG_TBL_MAX_SZ) 62 goto error; 63 tmpl_id = ulp_class_sig_tbl[class_hid]; 64 if (!tmpl_id) 65 goto error; 66 67 class_match = &ulp_class_match_list[tmpl_id]; 68 if (ULP_BITMAP_CMP(¶ms->hdr_bitmap, &class_match->hdr_sig)) { 69 BNXT_TF_DBG(DEBUG, "Proto Header does not match\n"); 70 goto error; 71 } 72 if (ULP_BITMAP_CMP(¶ms->fld_s_bitmap, &class_match->field_sig)) { 73 BNXT_TF_DBG(DEBUG, "Field signature does not match\n"); 74 goto error; 75 } 76 77 /* Match the application id before proceeding */ 78 if (params->app_id != class_match->app_sig) { 79 BNXT_TF_DBG(DEBUG, "Field to match the app id %u:%u\n", 80 params->app_id, class_match->app_sig); 81 goto error; 82 } 83 84 if (vf_to_vf != class_match->act_vnic) { 85 BNXT_TF_DBG(DEBUG, "Vnic Match failed\n"); 86 goto error; 87 } 88 BNXT_TF_DBG(DEBUG, "Found matching pattern template %d\n", 89 class_match->class_tid); 90 *class_id = class_match->class_tid; 91 params->hdr_sig_id = class_match->hdr_sig_id; 92 params->flow_sig_id = class_match->flow_sig_id; 93 params->flow_pattern_id = class_match->flow_pattern_id; 94 return BNXT_TF_RC_SUCCESS; 95 96 error: 97 BNXT_TF_DBG(DEBUG, "Did not find any matching template\n"); 98 *class_id = 0; 99 return BNXT_TF_RC_ERROR; 100 } 101 102 /* 103 * Function to handle the matching of RTE Flows and validating 104 * the action against the flow templates. 105 */ 106 int32_t 107 ulp_matcher_action_match(struct ulp_rte_parser_params *params, 108 uint32_t *act_id) 109 { 110 uint32_t act_hid; 111 uint16_t tmpl_id; 112 struct bnxt_ulp_act_match_info *act_match; 113 114 /* calculate the hash of the given flow action */ 115 act_hid = ulp_matcher_action_hash_calculate(params->act_bitmap.bits, 116 params->app_id); 117 118 /* validate the calculate hash values */ 119 if (act_hid >= BNXT_ULP_ACT_SIG_TBL_MAX_SZ) 120 goto error; 121 tmpl_id = ulp_act_sig_tbl[act_hid]; 122 if (!tmpl_id) 123 goto error; 124 125 act_match = &ulp_act_match_list[tmpl_id]; 126 if (ULP_BITMAP_CMP(¶ms->act_bitmap, &act_match->act_sig)) { 127 BNXT_TF_DBG(DEBUG, "Action Header does not match\n"); 128 goto error; 129 } 130 131 /* Match the application id before proceeding */ 132 if (params->app_id != act_match->app_sig) { 133 BNXT_TF_DBG(DEBUG, "Field to match the app id %u:%u\n", 134 params->app_id, act_match->app_sig); 135 goto error; 136 } 137 138 *act_id = act_match->act_tid; 139 params->act_pattern_id = act_match->act_pattern_id; 140 BNXT_TF_DBG(DEBUG, "Found matching action template %u\n", *act_id); 141 return BNXT_TF_RC_SUCCESS; 142 143 error: 144 BNXT_TF_DBG(DEBUG, "Did not find any matching action template\n"); 145 *act_id = 0; 146 return BNXT_TF_RC_ERROR; 147 } 148