Imported Upstream version 16.04

Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

1 files changed, 174 insertions, 0 deletions

diff --git a/drivers/net/ixgbe/base/ixgbe_dcb.h b/drivers/net/ixgbe/base/ixgbe_dcb.h
new file mode 100644
index 00000000..41208049
--- /dev/null
+++ b/drivers/net/ixgbe/base/ixgbe_dcb.h
@@ -0,0 +1,174 @@
+/*******************************************************************************
+
+Copyright (c) 2001-2015, Intel Corporation
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice,
+    this list of conditions and the following disclaimer.
+
+ 2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+ 3. Neither the name of the Intel Corporation nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+
+***************************************************************************/
+
+#ifndef _IXGBE_DCB_H_
+#define _IXGBE_DCB_H_
+
+#include "ixgbe_type.h"
+
+/* DCB defines */
+/* DCB credit calculation defines */
+#define IXGBE_DCB_CREDIT_QUANTUM	64
+#define IXGBE_DCB_MAX_CREDIT_REFILL	200   /* 200 * 64B = 12800B */
+#define IXGBE_DCB_MAX_TSO_SIZE		(32 * 1024) /* Max TSO pkt size in DCB*/
+#define IXGBE_DCB_MAX_CREDIT		(2 * IXGBE_DCB_MAX_CREDIT_REFILL)
+
+/* 513 for 32KB TSO packet */
+#define IXGBE_DCB_MIN_TSO_CREDIT	\
+	((IXGBE_DCB_MAX_TSO_SIZE / IXGBE_DCB_CREDIT_QUANTUM) + 1)
+
+/* DCB configuration defines */
+#define IXGBE_DCB_MAX_USER_PRIORITY	8
+#define IXGBE_DCB_MAX_BW_GROUP		8
+#define IXGBE_DCB_BW_PERCENT		100
+
+#define IXGBE_DCB_TX_CONFIG		0
+#define IXGBE_DCB_RX_CONFIG		1
+
+/* DCB capability defines */
+#define IXGBE_DCB_PG_SUPPORT	0x00000001
+#define IXGBE_DCB_PFC_SUPPORT	0x00000002
+#define IXGBE_DCB_BCN_SUPPORT	0x00000004
+#define IXGBE_DCB_UP2TC_SUPPORT	0x00000008
+#define IXGBE_DCB_GSP_SUPPORT	0x00000010
+
+struct ixgbe_dcb_support {
+	u32 capabilities; /* DCB capabilities */
+
+	/* Each bit represents a number of TCs configurable in the hw.
+	 * If 8 traffic classes can be configured, the value is 0x80. */
+	u8 traffic_classes;
+	u8 pfc_traffic_classes;
+};
+
+enum ixgbe_dcb_tsa {
+	ixgbe_dcb_tsa_ets = 0,
+	ixgbe_dcb_tsa_group_strict_cee,
+	ixgbe_dcb_tsa_strict
+};
+
+/* Traffic class bandwidth allocation per direction */
+struct ixgbe_dcb_tc_path {
+	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 ixgbe_dcb_tsa tsa; /* Link or Group Strict Priority */
+};
+
+enum ixgbe_dcb_pfc {
+	ixgbe_dcb_pfc_disabled = 0,
+	ixgbe_dcb_pfc_enabled,
+	ixgbe_dcb_pfc_enabled_txonly,
+	ixgbe_dcb_pfc_enabled_rxonly
+};
+
+/* Traffic class configuration */
+struct ixgbe_dcb_tc_config {
+	struct ixgbe_dcb_tc_path path[2]; /* One each for Tx/Rx */
+	enum ixgbe_dcb_pfc pfc; /* Class based flow control setting */
+
+	u16 desc_credits_max; /* For Tx Descriptor arbitration */
+	u8 tc; /* Traffic class (TC) */
+};
+
+enum ixgbe_dcb_pba {
+	/* PBA[0-7] each use 64KB FIFO */
+	ixgbe_dcb_pba_equal = PBA_STRATEGY_EQUAL,
+	/* PBA[0-3] each use 80KB, PBA[4-7] each use 48KB */
+	ixgbe_dcb_pba_80_48 = PBA_STRATEGY_WEIGHTED
+};
+
+struct ixgbe_dcb_num_tcs {
+	u8 pg_tcs;
+	u8 pfc_tcs;
+};
+
+struct ixgbe_dcb_config {
+	struct ixgbe_dcb_tc_config tc_config[IXGBE_DCB_MAX_TRAFFIC_CLASS];
+	struct ixgbe_dcb_support support;
+	struct ixgbe_dcb_num_tcs num_tcs;
+	u8 bw_percentage[2][IXGBE_DCB_MAX_BW_GROUP]; /* One each for Tx/Rx */
+	bool pfc_mode_enable;
+	bool round_robin_enable;
+
+	enum ixgbe_dcb_pba rx_pba_cfg;
+
+	u32 dcb_cfg_version; /* Not used...OS-specific? */
+	u32 link_speed; /* For bandwidth allocation validation purpose */
+	bool vt_mode;
+};
+
+/* DCB driver APIs */
+
+/* DCB rule checking */
+s32 ixgbe_dcb_check_config_cee(struct ixgbe_dcb_config *);
+
+/* DCB credits calculation */
+s32 ixgbe_dcb_calculate_tc_credits(u8 *, u16 *, u16 *, int);
+s32 ixgbe_dcb_calculate_tc_credits_cee(struct ixgbe_hw *,
+				       struct ixgbe_dcb_config *, u32, u8);
+
+/* DCB PFC */
+s32 ixgbe_dcb_config_pfc(struct ixgbe_hw *, u8, u8 *);
+s32 ixgbe_dcb_config_pfc_cee(struct ixgbe_hw *, struct ixgbe_dcb_config *);
+
+/* DCB stats */
+s32 ixgbe_dcb_config_tc_stats(struct ixgbe_hw *);
+s32 ixgbe_dcb_get_tc_stats(struct ixgbe_hw *, struct ixgbe_hw_stats *, u8);
+s32 ixgbe_dcb_get_pfc_stats(struct ixgbe_hw *, struct ixgbe_hw_stats *, u8);
+
+/* DCB config arbiters */
+s32 ixgbe_dcb_config_tx_desc_arbiter_cee(struct ixgbe_hw *,
+					 struct ixgbe_dcb_config *);
+s32 ixgbe_dcb_config_tx_data_arbiter_cee(struct ixgbe_hw *,
+					 struct ixgbe_dcb_config *);
+s32 ixgbe_dcb_config_rx_arbiter_cee(struct ixgbe_hw *,
+				    struct ixgbe_dcb_config *);
+
+/* DCB unpack routines */
+void ixgbe_dcb_unpack_pfc_cee(struct ixgbe_dcb_config *, u8 *, u8 *);
+void ixgbe_dcb_unpack_refill_cee(struct ixgbe_dcb_config *, int, u16 *);
+void ixgbe_dcb_unpack_max_cee(struct ixgbe_dcb_config *, u16 *);
+void ixgbe_dcb_unpack_bwgid_cee(struct ixgbe_dcb_config *, int, u8 *);
+void ixgbe_dcb_unpack_tsa_cee(struct ixgbe_dcb_config *, int, u8 *);
+void ixgbe_dcb_unpack_map_cee(struct ixgbe_dcb_config *, int, u8 *);
+u8 ixgbe_dcb_get_tc_from_up(struct ixgbe_dcb_config *, int, u8);
+
+/* DCB initialization */
+s32 ixgbe_dcb_hw_config(struct ixgbe_hw *, u16 *, u16 *, u8 *, u8 *, u8 *);
+s32 ixgbe_dcb_hw_config_cee(struct ixgbe_hw *, struct ixgbe_dcb_config *);
+#endif /* _IXGBE_DCB_H_ */