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
ulp_matcher_class_hash_calculate(uint64_t hi_sig,uint64_t lo_sig)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
ulp_matcher_action_hash_calculate(uint64_t hi_sig)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
ulp_matcher_pattern_match(struct ulp_rte_parser_params * params,uint32_t * class_id)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 /* Get vf to vf flow */
51 vf_to_vf = ULP_COMP_FLD_IDX_RD(params, BNXT_ULP_CF_IDX_VF_TO_VF);
52
53 /* calculate the hash of the given flow */
54 class_hid = ulp_matcher_class_hash_calculate(params->hdr_bitmap.bits,
55 params->fld_bitmap.bits);
56
57 /* validate the calculate hash values */
58 if (class_hid >= BNXT_ULP_CLASS_SIG_TBL_MAX_SZ)
59 goto error;
60 tmpl_id = ulp_class_sig_tbl[class_hid];
61 if (!tmpl_id)
62 goto error;
63
64 class_match = &ulp_class_match_list[tmpl_id];
65 if (ULP_BITMAP_CMP(¶ms->hdr_bitmap, &class_match->hdr_sig)) {
66 BNXT_TF_DBG(DEBUG, "Proto Header does not match\n");
67 goto error;
68 }
69 if (ULP_BITMAP_CMP(¶ms->fld_bitmap, &class_match->field_sig)) {
70 BNXT_TF_DBG(DEBUG, "Field signature does not match\n");
71 goto error;
72 }
73 if (vf_to_vf != class_match->act_vnic) {
74 BNXT_TF_DBG(DEBUG, "Vnic Match failed\n");
75 goto error;
76 }
77 BNXT_TF_DBG(DEBUG, "Found matching pattern template %d\n",
78 class_match->class_tid);
79 *class_id = class_match->class_tid;
80 return BNXT_TF_RC_SUCCESS;
81
82 error:
83 BNXT_TF_DBG(DEBUG, "Did not find any matching template\n");
84 *class_id = 0;
85 return BNXT_TF_RC_ERROR;
86 }
87
88 /*
89 * Function to handle the matching of RTE Flows and validating
90 * the action against the flow templates.
91 */
92 int32_t
ulp_matcher_action_match(struct ulp_rte_parser_params * params,uint32_t * act_id)93 ulp_matcher_action_match(struct ulp_rte_parser_params *params,
94 uint32_t *act_id)
95 {
96 uint32_t act_hid;
97 uint16_t tmpl_id;
98 struct bnxt_ulp_act_match_info *act_match;
99
100 /* calculate the hash of the given flow action */
101 act_hid = ulp_matcher_action_hash_calculate(params->act_bitmap.bits);
102
103 /* validate the calculate hash values */
104 if (act_hid >= BNXT_ULP_ACT_SIG_TBL_MAX_SZ)
105 goto error;
106 tmpl_id = ulp_act_sig_tbl[act_hid];
107 if (!tmpl_id)
108 goto error;
109
110 act_match = &ulp_act_match_list[tmpl_id];
111 if (ULP_BITMAP_CMP(¶ms->act_bitmap, &act_match->act_sig)) {
112 BNXT_TF_DBG(DEBUG, "Action Header does not match\n");
113 goto error;
114 }
115 *act_id = act_match->act_tid;
116 BNXT_TF_DBG(DEBUG, "Found matching action template %u\n", *act_id);
117 return BNXT_TF_RC_SUCCESS;
118
119 error:
120 BNXT_TF_DBG(DEBUG, "Did not find any matching action template\n");
121 *act_id = 0;
122 return BNXT_TF_RC_ERROR;
123 }
124