1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2014-2020 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) 27 { 28 uint64_t hash; 29 30 hi_sig |= ((hi_sig % BNXT_ULP_ACT_HID_HIGH_PRIME) << 31 BNXT_ULP_ACT_HID_SHFTL); 32 hash = hi_sig; 33 hash = (hash >> BNXT_ULP_ACT_HID_SHFTR) & BNXT_ULP_ACT_HID_MASK; 34 return (uint32_t)hash; 35 } 36 37 /* 38 * Function to handle the matching of RTE Flows and validating 39 * the pattern masks against the flow templates. 40 */ 41 int32_t 42 ulp_matcher_pattern_match(struct ulp_rte_parser_params *params, 43 uint32_t *class_id) 44 { 45 struct bnxt_ulp_class_match_info *class_match; 46 uint32_t class_hid; 47 uint8_t vf_to_vf; 48 uint16_t tmpl_id; 49 50 /* determine vf to vf flow */ 51 if (params->dir == ULP_DIR_EGRESS && 52 ULP_BITMAP_ISSET(params->act_bitmap.bits, 53 BNXT_ULP_ACTION_BIT_VNIC)) { 54 vf_to_vf = 1; 55 } else { 56 vf_to_vf = 0; 57 } 58 59 /* calculate the hash of the given flow */ 60 class_hid = ulp_matcher_class_hash_calculate(params->hdr_bitmap.bits, 61 params->fld_bitmap.bits); 62 63 /* validate the calculate hash values */ 64 if (class_hid >= BNXT_ULP_CLASS_SIG_TBL_MAX_SZ) 65 goto error; 66 tmpl_id = ulp_class_sig_tbl[class_hid]; 67 if (!tmpl_id) 68 goto error; 69 70 class_match = &ulp_class_match_list[tmpl_id]; 71 if (ULP_BITMAP_CMP(¶ms->hdr_bitmap, &class_match->hdr_sig)) { 72 BNXT_TF_DBG(DEBUG, "Proto Header does not match\n"); 73 goto error; 74 } 75 if (ULP_BITMAP_CMP(¶ms->fld_bitmap, &class_match->field_sig)) { 76 BNXT_TF_DBG(DEBUG, "Field signature does not match\n"); 77 goto error; 78 } 79 if (vf_to_vf != class_match->act_vnic) { 80 BNXT_TF_DBG(DEBUG, "Vnic Match failed\n"); 81 goto error; 82 } 83 BNXT_TF_DBG(DEBUG, "Found matching pattern template %d\n", 84 class_match->class_tid); 85 *class_id = class_match->class_tid; 86 return BNXT_TF_RC_SUCCESS; 87 88 error: 89 BNXT_TF_DBG(DEBUG, "Did not find any matching template\n"); 90 *class_id = 0; 91 return BNXT_TF_RC_ERROR; 92 } 93 94 /* 95 * Function to handle the matching of RTE Flows and validating 96 * the action against the flow templates. 97 */ 98 int32_t 99 ulp_matcher_action_match(struct ulp_rte_parser_params *params, 100 uint32_t *act_id) 101 { 102 uint32_t act_hid; 103 uint16_t tmpl_id; 104 struct bnxt_ulp_act_match_info *act_match; 105 106 /* calculate the hash of the given flow action */ 107 act_hid = ulp_matcher_action_hash_calculate(params->act_bitmap.bits); 108 109 /* validate the calculate hash values */ 110 if (act_hid >= BNXT_ULP_ACT_SIG_TBL_MAX_SZ) 111 goto error; 112 tmpl_id = ulp_act_sig_tbl[act_hid]; 113 if (!tmpl_id) 114 goto error; 115 116 act_match = &ulp_act_match_list[tmpl_id]; 117 if (ULP_BITMAP_CMP(¶ms->act_bitmap, &act_match->act_sig)) { 118 BNXT_TF_DBG(DEBUG, "Action Header does not match\n"); 119 goto error; 120 } 121 *act_id = act_match->act_tid; 122 BNXT_TF_DBG(DEBUG, "Found matching action template %u\n", *act_id); 123 return BNXT_TF_RC_SUCCESS; 124 125 error: 126 BNXT_TF_DBG(DEBUG, "Did not find any matching action template\n"); 127 *act_id = 0; 128 return BNXT_TF_RC_ERROR; 129 } 130