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-rw-r--r--drivers/net/ixgbe/ixgbe_dcb.h184
1 files changed, 184 insertions, 0 deletions
diff --git a/drivers/net/ixgbe/ixgbe_dcb.h b/drivers/net/ixgbe/ixgbe_dcb.h
new file mode 100644
index 00000000000..75f6efe1e36
--- /dev/null
+++ b/drivers/net/ixgbe/ixgbe_dcb.h
@@ -0,0 +1,184 @@
+/*******************************************************************************
+
+ Intel 10 Gigabit PCI Express Linux driver
+ Copyright(c) 1999 - 2007 Intel Corporation.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms and conditions of the GNU General Public License,
+ version 2, as published by the Free Software Foundation.
+
+ This program is distributed in the hope it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ more details.
+
+ You should have received a copy of the GNU General Public License along with
+ this program; if not, write to the Free Software Foundation, Inc.,
+ 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+
+ The full GNU General Public License is included in this distribution in
+ the file called "COPYING".
+
+ Contact Information:
+ Linux NICS <linux.nics@intel.com>
+ e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
+ Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+
+*******************************************************************************/
+
+#ifndef _DCB_CONFIG_H_
+#define _DCB_CONFIG_H_
+
+#include "ixgbe_type.h"
+
+/* DCB data structures */
+
+#define IXGBE_MAX_PACKET_BUFFERS 8
+#define MAX_USER_PRIORITY 8
+#define MAX_TRAFFIC_CLASS 8
+#define MAX_BW_GROUP 8
+#define BW_PERCENT 100
+
+#define DCB_TX_CONFIG 0
+#define DCB_RX_CONFIG 1
+
+/* DCB error Codes */
+#define DCB_SUCCESS 0
+#define DCB_ERR_CONFIG -1
+#define DCB_ERR_PARAM -2
+
+/* Transmit and receive Errors */
+/* Error in bandwidth group allocation */
+#define DCB_ERR_BW_GROUP -3
+/* Error in traffic class bandwidth allocation */
+#define DCB_ERR_TC_BW -4
+/* Traffic class has both link strict and group strict enabled */
+#define DCB_ERR_LS_GS -5
+/* Link strict traffic class has non zero bandwidth */
+#define DCB_ERR_LS_BW_NONZERO -6
+/* Link strict bandwidth group has non zero bandwidth */
+#define DCB_ERR_LS_BWG_NONZERO -7
+/* Traffic class has zero bandwidth */
+#define DCB_ERR_TC_BW_ZERO -8
+
+#define DCB_NOT_IMPLEMENTED 0x7FFFFFFF
+
+struct dcb_pfc_tc_debug {
+ u8 tc;
+ u8 pause_status;
+ u64 pause_quanta;
+};
+
+enum strict_prio_type {
+ prio_none = 0,
+ prio_group,
+ prio_link
+};
+
+/* Traffic class bandwidth allocation per direction */
+struct tc_bw_alloc {
+ u8 bwg_id; /* Bandwidth Group (BWG) ID */
+ u8 bwg_percent; /* % of BWG's bandwidth */
+ u8 link_percent; /* % of link bandwidth */
+ u8 up_to_tc_bitmap; /* User Priority to Traffic Class mapping */
+ u16 data_credits_refill; /* Credit refill amount in 64B granularity */
+ u16 data_credits_max; /* Max credits for a configured packet buffer
+ * in 64B granularity.*/
+ enum strict_prio_type prio_type; /* Link or Group Strict Priority */
+};
+
+enum dcb_pfc_type {
+ pfc_disabled = 0,
+ pfc_enabled_full,
+ pfc_enabled_tx,
+ pfc_enabled_rx
+};
+
+/* Traffic class configuration */
+struct tc_configuration {
+ struct tc_bw_alloc path[2]; /* One each for Tx/Rx */
+ enum dcb_pfc_type dcb_pfc; /* Class based flow control setting */
+
+ u16 desc_credits_max; /* For Tx Descriptor arbitration */
+ u8 tc; /* Traffic class (TC) */
+};
+
+enum dcb_rx_pba_cfg {
+ pba_equal, /* PBA[0-7] each use 64KB FIFO */
+ pba_80_48 /* PBA[0-3] each use 80KB, PBA[4-7] each use 48KB */
+};
+
+/*
+ * This structure contains many values encoded as fixed-point
+ * numbers, meaning that some of bits are dedicated to the
+ * magnitude and others to the fraction part. In the comments
+ * this is shown as f=n, where n is the number of fraction bits.
+ * These fraction bits are always the low-order bits. The size
+ * of the magnitude is not specified.
+ */
+struct bcn_config {
+ u32 rp_admin_mode[MAX_TRAFFIC_CLASS]; /* BCN enabled, per TC */
+ u32 bcna_option[2]; /* BCNA Port + MAC Addr */
+ u32 rp_w; /* Derivative Weight, f=3 */
+ u32 rp_gi; /* Increase Gain, f=12 */
+ u32 rp_gd; /* Decrease Gain, f=12 */
+ u32 rp_ru; /* Rate Unit */
+ u32 rp_alpha; /* Max Decrease Factor, f=12 */
+ u32 rp_beta; /* Max Increase Factor, f=12 */
+ u32 rp_ri; /* Initial Rate */
+ u32 rp_td; /* Drift Interval Timer */
+ u32 rp_rd; /* Drift Increase */
+ u32 rp_tmax; /* Severe Congestion Backoff Timer Range */
+ u32 rp_rmin; /* Severe Congestion Restart Rate */
+ u32 rp_wrtt; /* RTT Moving Average Weight */
+};
+
+struct ixgbe_dcb_config {
+ struct bcn_config bcn;
+
+ struct tc_configuration tc_config[MAX_TRAFFIC_CLASS];
+ u8 bw_percentage[2][MAX_BW_GROUP]; /* One each for Tx/Rx */
+
+ bool round_robin_enable;
+
+ enum dcb_rx_pba_cfg rx_pba_cfg;
+
+ u32 dcb_cfg_version; /* Not used...OS-specific? */
+ u32 link_speed; /* For bandwidth allocation validation purpose */
+};
+
+/* DCB driver APIs */
+
+/* DCB rule checking function.*/
+s32 ixgbe_dcb_check_config(struct ixgbe_dcb_config *config);
+
+/* DCB credits calculation */
+s32 ixgbe_dcb_calculate_tc_credits(struct ixgbe_dcb_config *, u8);
+
+/* DCB PFC functions */
+s32 ixgbe_dcb_config_pfc(struct ixgbe_hw *, struct ixgbe_dcb_config *g);
+s32 ixgbe_dcb_get_pfc_stats(struct ixgbe_hw *, struct ixgbe_hw_stats *, u8);
+
+/* DCB traffic class stats */
+s32 ixgbe_dcb_config_tc_stats(struct ixgbe_hw *);
+s32 ixgbe_dcb_get_tc_stats(struct ixgbe_hw *, struct ixgbe_hw_stats *, u8);
+
+/* DCB config arbiters */
+s32 ixgbe_dcb_config_tx_desc_arbiter(struct ixgbe_hw *,
+ struct ixgbe_dcb_config *);
+s32 ixgbe_dcb_config_tx_data_arbiter(struct ixgbe_hw *,
+ struct ixgbe_dcb_config *);
+s32 ixgbe_dcb_config_rx_arbiter(struct ixgbe_hw *, struct ixgbe_dcb_config *);
+
+/* DCB hw initialization */
+s32 ixgbe_dcb_hw_config(struct ixgbe_hw *, struct ixgbe_dcb_config *);
+
+/* DCB definitions for credit calculation */
+#define MAX_CREDIT_REFILL 511 /* 0x1FF * 64B = 32704B */
+#define MINIMUM_CREDIT_REFILL 5 /* 5*64B = 320B */
+#define MINIMUM_CREDIT_FOR_JUMBO 145 /* 145= UpperBound((9*1024+54)/64B) for 9KB jumbo frame */
+#define DCB_MAX_TSO_SIZE (32*1024) /* MAX TSO packet size supported in DCB mode */
+#define MINIMUM_CREDIT_FOR_TSO (DCB_MAX_TSO_SIZE/64 + 1) /* 513 for 32KB TSO packet */
+#define MAX_CREDIT 4095 /* Maximum credit supported: 256KB * 1204 / 64B */
+
+#endif /* _DCB_CONFIG_H */