1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (c) 2019, Intel Corporation. */
3 
4 #ifndef _ICE_DCB_LIB_H_
5 #define _ICE_DCB_LIB_H_
6 
7 #include "ice.h"
8 #include "ice_base.h"
9 #include "ice_lib.h"
10 
11 #ifdef CONFIG_DCB
12 #define ICE_TC_MAX_BW		100 /* Default Max BW percentage */
13 #define ICE_DCB_HW_CHG_RST	0 /* DCB configuration changed with reset */
14 #define ICE_DCB_NO_HW_CHG	1 /* DCB configuration did not change */
15 #define ICE_DCB_HW_CHG		2 /* DCB configuration changed, no reset */
16 
17 void ice_dcb_rebuild(struct ice_pf *pf);
18 u8 ice_dcb_get_ena_tc(struct ice_dcbx_cfg *dcbcfg);
19 u8 ice_dcb_get_num_tc(struct ice_dcbx_cfg *dcbcfg);
20 void ice_vsi_set_dcb_tc_cfg(struct ice_vsi *vsi);
21 bool ice_is_pfc_causing_hung_q(struct ice_pf *pf, unsigned int txqueue);
22 u8 ice_dcb_get_tc(struct ice_vsi *vsi, int queue_index);
23 int
24 ice_pf_dcb_cfg(struct ice_pf *pf, struct ice_dcbx_cfg *new_cfg, bool locked);
25 int ice_dcb_bwchk(struct ice_pf *pf, struct ice_dcbx_cfg *dcbcfg);
26 void ice_pf_dcb_recfg(struct ice_pf *pf);
27 void ice_vsi_cfg_dcb_rings(struct ice_vsi *vsi);
28 int ice_init_pf_dcb(struct ice_pf *pf, bool locked);
29 void ice_update_dcb_stats(struct ice_pf *pf);
30 void
31 ice_tx_prepare_vlan_flags_dcb(struct ice_ring *tx_ring,
32 			      struct ice_tx_buf *first);
33 void
34 ice_dcb_process_lldp_set_mib_change(struct ice_pf *pf,
35 				    struct ice_rq_event_info *event);
36 void ice_vsi_cfg_netdev_tc(struct ice_vsi *vsi, u8 ena_tc);
37 
38 /**
39  * ice_find_q_in_range
40  * @low: start of queue range for a TC i.e. offset of TC
41  * @high: start of queue for next TC
42  * @tx_q: hung_queue/tx_queue
43  *
44  * finds if queue 'tx_q' falls between the two offsets of any given TC
45  */
46 static inline bool ice_find_q_in_range(u16 low, u16 high, unsigned int tx_q)
47 {
48 	return (tx_q >= low) && (tx_q < high);
49 }
50 
51 static inline void
52 ice_set_cgd_num(struct ice_tlan_ctx *tlan_ctx, struct ice_ring *ring)
53 {
54 	tlan_ctx->cgd_num = ring->dcb_tc;
55 }
56 
57 static inline bool ice_is_dcb_active(struct ice_pf *pf)
58 {
59 	return (test_bit(ICE_FLAG_FW_LLDP_AGENT, pf->flags) ||
60 		test_bit(ICE_FLAG_DCB_ENA, pf->flags));
61 }
62 #else
63 static inline void ice_dcb_rebuild(struct ice_pf *pf) { }
64 
65 static inline u8 ice_dcb_get_ena_tc(struct ice_dcbx_cfg __always_unused *dcbcfg)
66 {
67 	return ICE_DFLT_TRAFFIC_CLASS;
68 }
69 
70 static inline u8 ice_dcb_get_num_tc(struct ice_dcbx_cfg __always_unused *dcbcfg)
71 {
72 	return 1;
73 }
74 
75 static inline u8
76 ice_dcb_get_tc(struct ice_vsi __always_unused *vsi,
77 	       int __always_unused queue_index)
78 {
79 	return 0;
80 }
81 
82 static inline int
83 ice_init_pf_dcb(struct ice_pf *pf, bool __always_unused locked)
84 {
85 	dev_dbg(ice_pf_to_dev(pf), "DCB not supported\n");
86 	return -EOPNOTSUPP;
87 }
88 
89 static inline int
90 ice_pf_dcb_cfg(struct ice_pf __always_unused *pf,
91 	       struct ice_dcbx_cfg __always_unused *new_cfg,
92 	       bool __always_unused locked)
93 {
94 	return -EOPNOTSUPP;
95 }
96 
97 static inline int
98 ice_tx_prepare_vlan_flags_dcb(struct ice_ring __always_unused *tx_ring,
99 			      struct ice_tx_buf __always_unused *first)
100 {
101 	return 0;
102 }
103 
104 static inline bool ice_is_dcb_active(struct ice_pf __always_unused *pf)
105 {
106 	return false;
107 }
108 
109 static inline bool
110 ice_is_pfc_causing_hung_q(struct ice_pf __always_unused *pf,
111 			  unsigned int __always_unused txqueue)
112 {
113 	return false;
114 }
115 
116 static inline void ice_pf_dcb_recfg(struct ice_pf *pf) { }
117 static inline void ice_vsi_cfg_dcb_rings(struct ice_vsi *vsi) { }
118 static inline void ice_update_dcb_stats(struct ice_pf *pf) { }
119 static inline void
120 ice_dcb_process_lldp_set_mib_change(struct ice_pf *pf, struct ice_rq_event_info *event) { }
121 static inline void ice_vsi_cfg_netdev_tc(struct ice_vsi *vsi, u8 ena_tc) { }
122 static inline void ice_set_cgd_num(struct ice_tlan_ctx *tlan_ctx, struct ice_ring *ring) { }
123 #endif /* CONFIG_DCB */
124 #endif /* _ICE_DCB_LIB_H_ */
125