1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2001-2018
8 #include "ixgbe_type.h"
11 /* DCB credit calculation defines */
12 #define IXGBE_DCB_CREDIT_QUANTUM 64
13 #define IXGBE_DCB_MAX_CREDIT_REFILL 200 /* 200 * 64B = 12800B */
14 #define IXGBE_DCB_MAX_TSO_SIZE (32 * 1024) /* Max TSO pkt size in DCB*/
15 #define IXGBE_DCB_MAX_CREDIT (2 * IXGBE_DCB_MAX_CREDIT_REFILL)
17 /* 513 for 32KB TSO packet */
18 #define IXGBE_DCB_MIN_TSO_CREDIT \
19 ((IXGBE_DCB_MAX_TSO_SIZE / IXGBE_DCB_CREDIT_QUANTUM) + 1)
21 /* DCB configuration defines */
22 #define IXGBE_DCB_MAX_USER_PRIORITY 8
23 #define IXGBE_DCB_MAX_BW_GROUP 8
24 #define IXGBE_DCB_BW_PERCENT 100
26 #define IXGBE_DCB_TX_CONFIG 0
27 #define IXGBE_DCB_RX_CONFIG 1
29 /* DCB capability defines */
30 #define IXGBE_DCB_PG_SUPPORT 0x00000001
31 #define IXGBE_DCB_PFC_SUPPORT 0x00000002
32 #define IXGBE_DCB_BCN_SUPPORT 0x00000004
33 #define IXGBE_DCB_UP2TC_SUPPORT 0x00000008
34 #define IXGBE_DCB_GSP_SUPPORT 0x00000010
36 struct ixgbe_dcb_support {
37 u32 capabilities; /* DCB capabilities */
39 /* Each bit represents a number of TCs configurable in the hw.
40 * If 8 traffic classes can be configured, the value is 0x80. */
42 u8 pfc_traffic_classes;
46 ixgbe_dcb_tsa_ets = 0,
47 ixgbe_dcb_tsa_group_strict_cee,
51 /* Traffic class bandwidth allocation per direction */
52 struct ixgbe_dcb_tc_path {
53 u8 bwg_id; /* Bandwidth Group (BWG) ID */
54 u8 bwg_percent; /* % of BWG's bandwidth */
55 u8 link_percent; /* % of link bandwidth */
56 u8 up_to_tc_bitmap; /* User Priority to Traffic Class mapping */
57 u16 data_credits_refill; /* Credit refill amount in 64B granularity */
58 u16 data_credits_max; /* Max credits for a configured packet buffer
59 * in 64B granularity.*/
60 enum ixgbe_dcb_tsa tsa; /* Link or Group Strict Priority */
64 ixgbe_dcb_pfc_disabled = 0,
65 ixgbe_dcb_pfc_enabled,
66 ixgbe_dcb_pfc_enabled_txonly,
67 ixgbe_dcb_pfc_enabled_rxonly
70 /* Traffic class configuration */
71 struct ixgbe_dcb_tc_config {
72 struct ixgbe_dcb_tc_path path[2]; /* One each for Tx/Rx */
73 enum ixgbe_dcb_pfc pfc; /* Class based flow control setting */
75 u16 desc_credits_max; /* For Tx Descriptor arbitration */
76 u8 tc; /* Traffic class (TC) */
80 /* PBA[0-7] each use 64KB FIFO */
81 ixgbe_dcb_pba_equal = PBA_STRATEGY_EQUAL,
82 /* PBA[0-3] each use 80KB, PBA[4-7] each use 48KB */
83 ixgbe_dcb_pba_80_48 = PBA_STRATEGY_WEIGHTED
86 struct ixgbe_dcb_num_tcs {
91 struct ixgbe_dcb_config {
92 struct ixgbe_dcb_tc_config tc_config[IXGBE_DCB_MAX_TRAFFIC_CLASS];
93 struct ixgbe_dcb_support support;
94 struct ixgbe_dcb_num_tcs num_tcs;
95 u8 bw_percentage[2][IXGBE_DCB_MAX_BW_GROUP]; /* One each for Tx/Rx */
97 bool round_robin_enable;
99 enum ixgbe_dcb_pba rx_pba_cfg;
101 u32 dcb_cfg_version; /* Not used...OS-specific? */
102 u32 link_speed; /* For bandwidth allocation validation purpose */
106 /* DCB driver APIs */
108 /* DCB rule checking */
109 s32 ixgbe_dcb_check_config_cee(struct ixgbe_dcb_config *);
111 /* DCB credits calculation */
112 s32 ixgbe_dcb_calculate_tc_credits(u8 *, u16 *, u16 *, int);
113 s32 ixgbe_dcb_calculate_tc_credits_cee(struct ixgbe_hw *,
114 struct ixgbe_dcb_config *, u32, u8);
117 s32 ixgbe_dcb_config_pfc(struct ixgbe_hw *, u8, u8 *);
118 s32 ixgbe_dcb_config_pfc_cee(struct ixgbe_hw *, struct ixgbe_dcb_config *);
121 s32 ixgbe_dcb_config_tc_stats(struct ixgbe_hw *);
122 s32 ixgbe_dcb_get_tc_stats(struct ixgbe_hw *, struct ixgbe_hw_stats *, u8);
123 s32 ixgbe_dcb_get_pfc_stats(struct ixgbe_hw *, struct ixgbe_hw_stats *, u8);
125 /* DCB config arbiters */
126 s32 ixgbe_dcb_config_tx_desc_arbiter_cee(struct ixgbe_hw *,
127 struct ixgbe_dcb_config *);
128 s32 ixgbe_dcb_config_tx_data_arbiter_cee(struct ixgbe_hw *,
129 struct ixgbe_dcb_config *);
130 s32 ixgbe_dcb_config_rx_arbiter_cee(struct ixgbe_hw *,
131 struct ixgbe_dcb_config *);
133 /* DCB unpack routines */
134 void ixgbe_dcb_unpack_pfc_cee(struct ixgbe_dcb_config *, u8 *, u8 *);
135 void ixgbe_dcb_unpack_refill_cee(struct ixgbe_dcb_config *, int, u16 *);
136 void ixgbe_dcb_unpack_max_cee(struct ixgbe_dcb_config *, u16 *);
137 void ixgbe_dcb_unpack_bwgid_cee(struct ixgbe_dcb_config *, int, u8 *);
138 void ixgbe_dcb_unpack_tsa_cee(struct ixgbe_dcb_config *, int, u8 *);
139 void ixgbe_dcb_unpack_map_cee(struct ixgbe_dcb_config *, int, u8 *);
140 u8 ixgbe_dcb_get_tc_from_up(struct ixgbe_dcb_config *, int, u8);
142 /* DCB initialization */
143 s32 ixgbe_dcb_hw_config(struct ixgbe_hw *, u16 *, u16 *, u8 *, u8 *, u8 *);
144 s32 ixgbe_dcb_hw_config_cee(struct ixgbe_hw *, struct ixgbe_dcb_config *);
145 #endif /* _IXGBE_DCB_H_ */