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1 | /******************************************************************************* |
2 | ||
3 | Intel 10 Gigabit PCI Express Linux driver | |
3efac5a0 | 4 | Copyright(c) 1999 - 2009 Intel Corporation. |
2f90b865 AD |
5 | |
6 | This program is free software; you can redistribute it and/or modify it | |
7 | under the terms and conditions of the GNU General Public License, | |
8 | version 2, as published by the Free Software Foundation. | |
9 | ||
10 | This program is distributed in the hope it will be useful, but WITHOUT | |
11 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License along with | |
16 | this program; if not, write to the Free Software Foundation, Inc., | |
17 | 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
18 | ||
19 | The full GNU General Public License is included in this distribution in | |
20 | the file called "COPYING". | |
21 | ||
22 | Contact Information: | |
23 | Linux NICS <linux.nics@intel.com> | |
24 | e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> | |
25 | Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
26 | ||
27 | *******************************************************************************/ | |
28 | ||
29 | #ifndef _DCB_CONFIG_H_ | |
30 | #define _DCB_CONFIG_H_ | |
31 | ||
32 | #include "ixgbe_type.h" | |
33 | ||
34 | /* DCB data structures */ | |
35 | ||
36 | #define IXGBE_MAX_PACKET_BUFFERS 8 | |
37 | #define MAX_USER_PRIORITY 8 | |
38 | #define MAX_TRAFFIC_CLASS 8 | |
39 | #define MAX_BW_GROUP 8 | |
40 | #define BW_PERCENT 100 | |
41 | ||
42 | #define DCB_TX_CONFIG 0 | |
43 | #define DCB_RX_CONFIG 1 | |
44 | ||
45 | /* DCB error Codes */ | |
46 | #define DCB_SUCCESS 0 | |
47 | #define DCB_ERR_CONFIG -1 | |
48 | #define DCB_ERR_PARAM -2 | |
49 | ||
50 | /* Transmit and receive Errors */ | |
51 | /* Error in bandwidth group allocation */ | |
52 | #define DCB_ERR_BW_GROUP -3 | |
53 | /* Error in traffic class bandwidth allocation */ | |
54 | #define DCB_ERR_TC_BW -4 | |
55 | /* Traffic class has both link strict and group strict enabled */ | |
56 | #define DCB_ERR_LS_GS -5 | |
57 | /* Link strict traffic class has non zero bandwidth */ | |
58 | #define DCB_ERR_LS_BW_NONZERO -6 | |
59 | /* Link strict bandwidth group has non zero bandwidth */ | |
60 | #define DCB_ERR_LS_BWG_NONZERO -7 | |
61 | /* Traffic class has zero bandwidth */ | |
62 | #define DCB_ERR_TC_BW_ZERO -8 | |
63 | ||
64 | #define DCB_NOT_IMPLEMENTED 0x7FFFFFFF | |
65 | ||
66 | struct dcb_pfc_tc_debug { | |
67 | u8 tc; | |
68 | u8 pause_status; | |
69 | u64 pause_quanta; | |
70 | }; | |
71 | ||
72 | enum strict_prio_type { | |
73 | prio_none = 0, | |
74 | prio_group, | |
75 | prio_link | |
76 | }; | |
77 | ||
78 | /* Traffic class bandwidth allocation per direction */ | |
79 | struct tc_bw_alloc { | |
80 | u8 bwg_id; /* Bandwidth Group (BWG) ID */ | |
81 | u8 bwg_percent; /* % of BWG's bandwidth */ | |
82 | u8 link_percent; /* % of link bandwidth */ | |
83 | u8 up_to_tc_bitmap; /* User Priority to Traffic Class mapping */ | |
84 | u16 data_credits_refill; /* Credit refill amount in 64B granularity */ | |
85 | u16 data_credits_max; /* Max credits for a configured packet buffer | |
86 | * in 64B granularity.*/ | |
87 | enum strict_prio_type prio_type; /* Link or Group Strict Priority */ | |
88 | }; | |
89 | ||
90 | enum dcb_pfc_type { | |
91 | pfc_disabled = 0, | |
92 | pfc_enabled_full, | |
93 | pfc_enabled_tx, | |
94 | pfc_enabled_rx | |
95 | }; | |
96 | ||
97 | /* Traffic class configuration */ | |
98 | struct tc_configuration { | |
99 | struct tc_bw_alloc path[2]; /* One each for Tx/Rx */ | |
100 | enum dcb_pfc_type dcb_pfc; /* Class based flow control setting */ | |
101 | ||
102 | u16 desc_credits_max; /* For Tx Descriptor arbitration */ | |
103 | u8 tc; /* Traffic class (TC) */ | |
104 | }; | |
105 | ||
106 | enum dcb_rx_pba_cfg { | |
107 | pba_equal, /* PBA[0-7] each use 64KB FIFO */ | |
108 | pba_80_48 /* PBA[0-3] each use 80KB, PBA[4-7] each use 48KB */ | |
109 | }; | |
110 | ||
859ee3c4 AD |
111 | /* |
112 | * This structure contains many values encoded as fixed-point | |
113 | * numbers, meaning that some of bits are dedicated to the | |
114 | * magnitude and others to the fraction part. In the comments | |
115 | * this is shown as f=n, where n is the number of fraction bits. | |
116 | * These fraction bits are always the low-order bits. The size | |
117 | * of the magnitude is not specified. | |
118 | */ | |
119 | struct bcn_config { | |
120 | u32 rp_admin_mode[MAX_TRAFFIC_CLASS]; /* BCN enabled, per TC */ | |
121 | u32 bcna_option[2]; /* BCNA Port + MAC Addr */ | |
122 | u32 rp_w; /* Derivative Weight, f=3 */ | |
123 | u32 rp_gi; /* Increase Gain, f=12 */ | |
124 | u32 rp_gd; /* Decrease Gain, f=12 */ | |
125 | u32 rp_ru; /* Rate Unit */ | |
126 | u32 rp_alpha; /* Max Decrease Factor, f=12 */ | |
127 | u32 rp_beta; /* Max Increase Factor, f=12 */ | |
128 | u32 rp_ri; /* Initial Rate */ | |
129 | u32 rp_td; /* Drift Interval Timer */ | |
130 | u32 rp_rd; /* Drift Increase */ | |
131 | u32 rp_tmax; /* Severe Congestion Backoff Timer Range */ | |
132 | u32 rp_rmin; /* Severe Congestion Restart Rate */ | |
133 | u32 rp_wrtt; /* RTT Moving Average Weight */ | |
134 | }; | |
135 | ||
2f90b865 | 136 | struct ixgbe_dcb_config { |
859ee3c4 AD |
137 | struct bcn_config bcn; |
138 | ||
2f90b865 AD |
139 | struct tc_configuration tc_config[MAX_TRAFFIC_CLASS]; |
140 | u8 bw_percentage[2][MAX_BW_GROUP]; /* One each for Tx/Rx */ | |
141 | ||
142 | bool round_robin_enable; | |
143 | ||
144 | enum dcb_rx_pba_cfg rx_pba_cfg; | |
145 | ||
146 | u32 dcb_cfg_version; /* Not used...OS-specific? */ | |
147 | u32 link_speed; /* For bandwidth allocation validation purpose */ | |
148 | }; | |
149 | ||
150 | /* DCB driver APIs */ | |
151 | ||
152 | /* DCB rule checking function.*/ | |
153 | s32 ixgbe_dcb_check_config(struct ixgbe_dcb_config *config); | |
154 | ||
155 | /* DCB credits calculation */ | |
156 | s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_dcb_config *, u8); | |
157 | ||
158 | /* DCB PFC functions */ | |
159 | s32 ixgbe_dcb_config_pfc(struct ixgbe_hw *, struct ixgbe_dcb_config *g); | |
160 | s32 ixgbe_dcb_get_pfc_stats(struct ixgbe_hw *, struct ixgbe_hw_stats *, u8); | |
161 | ||
162 | /* DCB traffic class stats */ | |
163 | s32 ixgbe_dcb_config_tc_stats(struct ixgbe_hw *); | |
164 | s32 ixgbe_dcb_get_tc_stats(struct ixgbe_hw *, struct ixgbe_hw_stats *, u8); | |
165 | ||
166 | /* DCB config arbiters */ | |
167 | s32 ixgbe_dcb_config_tx_desc_arbiter(struct ixgbe_hw *, | |
168 | struct ixgbe_dcb_config *); | |
169 | s32 ixgbe_dcb_config_tx_data_arbiter(struct ixgbe_hw *, | |
170 | struct ixgbe_dcb_config *); | |
171 | s32 ixgbe_dcb_config_rx_arbiter(struct ixgbe_hw *, struct ixgbe_dcb_config *); | |
172 | ||
173 | /* DCB hw initialization */ | |
174 | s32 ixgbe_dcb_hw_config(struct ixgbe_hw *, struct ixgbe_dcb_config *); | |
175 | ||
176 | /* DCB definitions for credit calculation */ | |
177 | #define MAX_CREDIT_REFILL 511 /* 0x1FF * 64B = 32704B */ | |
178 | #define MINIMUM_CREDIT_REFILL 5 /* 5*64B = 320B */ | |
179 | #define MINIMUM_CREDIT_FOR_JUMBO 145 /* 145= UpperBound((9*1024+54)/64B) for 9KB jumbo frame */ | |
180 | #define DCB_MAX_TSO_SIZE (32*1024) /* MAX TSO packet size supported in DCB mode */ | |
181 | #define MINIMUM_CREDIT_FOR_TSO (DCB_MAX_TSO_SIZE/64 + 1) /* 513 for 32KB TSO packet */ | |
182 | #define MAX_CREDIT 4095 /* Maximum credit supported: 256KB * 1204 / 64B */ | |
183 | ||
184 | #endif /* _DCB_CONFIG_H */ |