drivers/net/ethernet/intel/ice/ice_dcb_lib.h

   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_ */