1 /*******************************************************************************
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2013 Intel Corporation.
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.
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
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.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
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
27 *******************************************************************************/
29 #ifndef _DCB_CONFIG_H_
30 #define _DCB_CONFIG_H_
32 #include <linux/dcbnl.h>
33 #include "ixgbe_type.h"
35 /* DCB data structures */
37 #define IXGBE_MAX_PACKET_BUFFERS 8
38 #define MAX_USER_PRIORITY 8
39 #define MAX_BW_GROUP 8
40 #define BW_PERCENT 100
42 #define DCB_TX_CONFIG 0
43 #define DCB_RX_CONFIG 1
47 #define DCB_ERR_CONFIG -1
48 #define DCB_ERR_PARAM -2
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
64 #define DCB_NOT_IMPLEMENTED 0x7FFFFFFF
66 struct dcb_pfc_tc_debug {
72 enum strict_prio_type {
78 /* DCB capability definitions */
79 #define IXGBE_DCB_PG_SUPPORT 0x00000001
80 #define IXGBE_DCB_PFC_SUPPORT 0x00000002
81 #define IXGBE_DCB_BCN_SUPPORT 0x00000004
82 #define IXGBE_DCB_UP2TC_SUPPORT 0x00000008
83 #define IXGBE_DCB_GSP_SUPPORT 0x00000010
85 #define IXGBE_DCB_8_TC_SUPPORT 0x80
88 /* DCB capabilities */
91 /* Each bit represents a number of TCs configurable in the hw.
92 * If 8 traffic classes can be configured, the value is 0x80.
95 u8 pfc_traffic_classes;
98 /* Traffic class bandwidth allocation per direction */
100 u8 bwg_id; /* Bandwidth Group (BWG) ID */
101 u8 bwg_percent; /* % of BWG's bandwidth */
102 u8 link_percent; /* % of link bandwidth */
103 u8 up_to_tc_bitmap; /* User Priority to Traffic Class mapping */
104 u16 data_credits_refill; /* Credit refill amount in 64B granularity */
105 u16 data_credits_max; /* Max credits for a configured packet buffer
106 * in 64B granularity.*/
107 enum strict_prio_type prio_type; /* Link or Group Strict Priority */
117 /* Traffic class configuration */
118 struct tc_configuration {
119 struct tc_bw_alloc path[2]; /* One each for Tx/Rx */
120 enum dcb_pfc_type dcb_pfc; /* Class based flow control setting */
122 u16 desc_credits_max; /* For Tx Descriptor arbitration */
123 u8 tc; /* Traffic class (TC) */
131 struct ixgbe_dcb_config {
132 struct dcb_support support;
133 struct dcb_num_tcs num_tcs;
134 struct tc_configuration tc_config[MAX_TRAFFIC_CLASS];
135 u8 bw_percentage[2][MAX_BW_GROUP]; /* One each for Tx/Rx */
136 bool pfc_mode_enable;
138 u32 dcb_cfg_version; /* Not used...OS-specific? */
139 u32 link_speed; /* For bandwidth allocation validation purpose */
142 /* DCB driver APIs */
143 void ixgbe_dcb_unpack_pfc(struct ixgbe_dcb_config *cfg, u8 *pfc_en);
144 void ixgbe_dcb_unpack_refill(struct ixgbe_dcb_config *, int, u16 *);
145 void ixgbe_dcb_unpack_max(struct ixgbe_dcb_config *, u16 *);
146 void ixgbe_dcb_unpack_bwgid(struct ixgbe_dcb_config *, int, u8 *);
147 void ixgbe_dcb_unpack_prio(struct ixgbe_dcb_config *, int, u8 *);
148 void ixgbe_dcb_unpack_map(struct ixgbe_dcb_config *, int, u8 *);
149 u8 ixgbe_dcb_get_tc_from_up(struct ixgbe_dcb_config *, int, u8);
151 /* DCB credits calculation */
152 s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_hw *,
153 struct ixgbe_dcb_config *, int, u8);
155 /* DCB hw initialization */
156 s32 ixgbe_dcb_hw_ets(struct ixgbe_hw *hw, struct ieee_ets *ets, int max);
157 s32 ixgbe_dcb_hw_ets_config(struct ixgbe_hw *hw, u16 *refill, u16 *max,
158 u8 *bwg_id, u8 *prio_type, u8 *tc_prio);
159 s32 ixgbe_dcb_hw_pfc_config(struct ixgbe_hw *hw, u8 pfc_en, u8 *tc_prio);
160 s32 ixgbe_dcb_hw_config(struct ixgbe_hw *, struct ixgbe_dcb_config *);
162 void ixgbe_dcb_read_rtrup2tc(struct ixgbe_hw *hw, u8 *map);
164 /* DCB definitions for credit calculation */
165 #define DCB_CREDIT_QUANTUM 64 /* DCB Quantum */
166 #define MAX_CREDIT_REFILL 511 /* 0x1FF * 64B = 32704B */
167 #define DCB_MAX_TSO_SIZE (32*1024) /* MAX TSO packet size supported in DCB mode */
168 #define MINIMUM_CREDIT_FOR_TSO (DCB_MAX_TSO_SIZE/64 + 1) /* 513 for 32KB TSO packet */
169 #define MAX_CREDIT 4095 /* Maximum credit supported: 256KB * 1204 / 64B */
171 #endif /* _DCB_CONFIG_H */