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32 ***************************************************************************/
37 #include "ixgbe_type.h"
40 /* DCB credit calculation defines */
41 #define IXGBE_DCB_CREDIT_QUANTUM 64
42 #define IXGBE_DCB_MAX_CREDIT_REFILL 200 /* 200 * 64B = 12800B */
43 #define IXGBE_DCB_MAX_TSO_SIZE (32 * 1024) /* Max TSO pkt size in DCB*/
44 #define IXGBE_DCB_MAX_CREDIT (2 * IXGBE_DCB_MAX_CREDIT_REFILL)
46 /* 513 for 32KB TSO packet */
47 #define IXGBE_DCB_MIN_TSO_CREDIT \
48 ((IXGBE_DCB_MAX_TSO_SIZE / IXGBE_DCB_CREDIT_QUANTUM) + 1)
50 /* DCB configuration defines */
51 #define IXGBE_DCB_MAX_USER_PRIORITY 8
52 #define IXGBE_DCB_MAX_BW_GROUP 8
53 #define IXGBE_DCB_BW_PERCENT 100
55 #define IXGBE_DCB_TX_CONFIG 0
56 #define IXGBE_DCB_RX_CONFIG 1
58 /* DCB capability defines */
59 #define IXGBE_DCB_PG_SUPPORT 0x00000001
60 #define IXGBE_DCB_PFC_SUPPORT 0x00000002
61 #define IXGBE_DCB_BCN_SUPPORT 0x00000004
62 #define IXGBE_DCB_UP2TC_SUPPORT 0x00000008
63 #define IXGBE_DCB_GSP_SUPPORT 0x00000010
65 struct ixgbe_dcb_support {
66 u32 capabilities; /* DCB capabilities */
68 /* Each bit represents a number of TCs configurable in the hw.
69 * If 8 traffic classes can be configured, the value is 0x80. */
71 u8 pfc_traffic_classes;
75 ixgbe_dcb_tsa_ets = 0,
76 ixgbe_dcb_tsa_group_strict_cee,
80 /* Traffic class bandwidth allocation per direction */
81 struct ixgbe_dcb_tc_path {
82 u8 bwg_id; /* Bandwidth Group (BWG) ID */
83 u8 bwg_percent; /* % of BWG's bandwidth */
84 u8 link_percent; /* % of link bandwidth */
85 u8 up_to_tc_bitmap; /* User Priority to Traffic Class mapping */
86 u16 data_credits_refill; /* Credit refill amount in 64B granularity */
87 u16 data_credits_max; /* Max credits for a configured packet buffer
88 * in 64B granularity.*/
89 enum ixgbe_dcb_tsa tsa; /* Link or Group Strict Priority */
93 ixgbe_dcb_pfc_disabled = 0,
94 ixgbe_dcb_pfc_enabled,
95 ixgbe_dcb_pfc_enabled_txonly,
96 ixgbe_dcb_pfc_enabled_rxonly
99 /* Traffic class configuration */
100 struct ixgbe_dcb_tc_config {
101 struct ixgbe_dcb_tc_path path[2]; /* One each for Tx/Rx */
102 enum ixgbe_dcb_pfc pfc; /* Class based flow control setting */
104 u16 desc_credits_max; /* For Tx Descriptor arbitration */
105 u8 tc; /* Traffic class (TC) */
109 /* PBA[0-7] each use 64KB FIFO */
110 ixgbe_dcb_pba_equal = PBA_STRATEGY_EQUAL,
111 /* PBA[0-3] each use 80KB, PBA[4-7] each use 48KB */
112 ixgbe_dcb_pba_80_48 = PBA_STRATEGY_WEIGHTED
115 struct ixgbe_dcb_num_tcs {
120 struct ixgbe_dcb_config {
121 struct ixgbe_dcb_tc_config tc_config[IXGBE_DCB_MAX_TRAFFIC_CLASS];
122 struct ixgbe_dcb_support support;
123 struct ixgbe_dcb_num_tcs num_tcs;
124 u8 bw_percentage[2][IXGBE_DCB_MAX_BW_GROUP]; /* One each for Tx/Rx */
125 bool pfc_mode_enable;
126 bool round_robin_enable;
128 enum ixgbe_dcb_pba rx_pba_cfg;
130 u32 dcb_cfg_version; /* Not used...OS-specific? */
131 u32 link_speed; /* For bandwidth allocation validation purpose */
135 /* DCB driver APIs */
137 /* DCB rule checking */
138 s32 ixgbe_dcb_check_config_cee(struct ixgbe_dcb_config *);
140 /* DCB credits calculation */
141 s32 ixgbe_dcb_calculate_tc_credits(u8 *, u16 *, u16 *, int);
142 s32 ixgbe_dcb_calculate_tc_credits_cee(struct ixgbe_hw *,
143 struct ixgbe_dcb_config *, u32, u8);
146 s32 ixgbe_dcb_config_pfc(struct ixgbe_hw *, u8, u8 *);
147 s32 ixgbe_dcb_config_pfc_cee(struct ixgbe_hw *, struct ixgbe_dcb_config *);
150 s32 ixgbe_dcb_config_tc_stats(struct ixgbe_hw *);
151 s32 ixgbe_dcb_get_tc_stats(struct ixgbe_hw *, struct ixgbe_hw_stats *, u8);
152 s32 ixgbe_dcb_get_pfc_stats(struct ixgbe_hw *, struct ixgbe_hw_stats *, u8);
154 /* DCB config arbiters */
155 s32 ixgbe_dcb_config_tx_desc_arbiter_cee(struct ixgbe_hw *,
156 struct ixgbe_dcb_config *);
157 s32 ixgbe_dcb_config_tx_data_arbiter_cee(struct ixgbe_hw *,
158 struct ixgbe_dcb_config *);
159 s32 ixgbe_dcb_config_rx_arbiter_cee(struct ixgbe_hw *,
160 struct ixgbe_dcb_config *);
162 /* DCB unpack routines */
163 void ixgbe_dcb_unpack_pfc_cee(struct ixgbe_dcb_config *, u8 *, u8 *);
164 void ixgbe_dcb_unpack_refill_cee(struct ixgbe_dcb_config *, int, u16 *);
165 void ixgbe_dcb_unpack_max_cee(struct ixgbe_dcb_config *, u16 *);
166 void ixgbe_dcb_unpack_bwgid_cee(struct ixgbe_dcb_config *, int, u8 *);
167 void ixgbe_dcb_unpack_tsa_cee(struct ixgbe_dcb_config *, int, u8 *);
168 void ixgbe_dcb_unpack_map_cee(struct ixgbe_dcb_config *, int, u8 *);
169 u8 ixgbe_dcb_get_tc_from_up(struct ixgbe_dcb_config *, int, u8);
171 /* DCB initialization */
172 s32 ixgbe_dcb_hw_config(struct ixgbe_hw *, u16 *, u16 *, u8 *, u8 *, u8 *);
173 s32 ixgbe_dcb_hw_config_cee(struct ixgbe_hw *, struct ixgbe_dcb_config *);
174 #endif /* _IXGBE_DCB_H_ */