path: root/drivers/net/ethernet/amd/xgbe/xgbe.h

/*
 * AMD 10Gb Ethernet driver
 *
 * This file is available to you under your choice of the following two
 * licenses:
 *
 * License 1: GPLv2
 *
 * Copyright (c) 2014-2016 Advanced Micro Devices, Inc.
 *
 * This file is free software; you may copy, redistribute and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or (at
 * your option) any later version.
 *
 * This file is distributed in the hope that 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, see <http://www.gnu.org/licenses/>.
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
 *     (hereinafter "Software") is an unsupported proprietary work of Synopsys,
 *     Inc. unless otherwise expressly agreed to in writing between Synopsys
 *     and you.
 *
 *     The Software IS NOT an item of Licensed Software or Licensed Product
 *     under any End User Software License Agreement or Agreement for Licensed
 *     Product with Synopsys or any supplement thereto.  Permission is hereby
 *     granted, free of charge, to any person obtaining a copy of this software
 *     annotated with this license and the Software, to deal in the Software
 *     without restriction, including without limitation the rights to use,
 *     copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 *     of the Software, and to permit persons to whom the Software is furnished
 *     to do so, subject to the following conditions:
 *
 *     The above copyright notice and this permission notice shall be included
 *     in all copies or substantial portions of the Software.
 *
 *     THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
 *     BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 *     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
 *     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.
 *
 *
 * License 2: Modified BSD
 *
 * Copyright (c) 2014-2016 Advanced Micro Devices, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Advanced Micro Devices, Inc. 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 <COPYRIGHT HOLDER> 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.
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
 *     (hereinafter "Software") is an unsupported proprietary work of Synopsys,
 *     Inc. unless otherwise expressly agreed to in writing between Synopsys
 *     and you.
 *
 *     The Software IS NOT an item of Licensed Software or Licensed Product
 *     under any End User Software License Agreement or Agreement for Licensed
 *     Product with Synopsys or any supplement thereto.  Permission is hereby
 *     granted, free of charge, to any person obtaining a copy of this software
 *     annotated with this license and the Software, to deal in the Software
 *     without restriction, including without limitation the rights to use,
 *     copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 *     of the Software, and to permit persons to whom the Software is furnished
 *     to do so, subject to the following conditions:
 *
 *     The above copyright notice and this permission notice shall be included
 *     in all copies or substantial portions of the Software.
 *
 *     THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
 *     BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 *     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
 *     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 __XGBE_H__
#define __XGBE_H__

#include <linux/dma-mapping.h>
#include <linux/netdevice.h>
#include <linux/workqueue.h>
#include <linux/phy.h>
#include <linux/if_vlan.h>
#include <linux/bitops.h>
#include <linux/ptp_clock_kernel.h>
#include <linux/timecounter.h>
#include <linux/net_tstamp.h>
#include <net/dcbnl.h>

#define XGBE_DRV_NAME		"amd-xgbe"
#define XGBE_DRV_VERSION	"1.0.2"
#define XGBE_DRV_DESC		"AMD 10 Gigabit Ethernet Driver"

/* Descriptor related defines */
#define XGBE_TX_DESC_CNT	512
#define XGBE_TX_DESC_MIN_FREE	(XGBE_TX_DESC_CNT >> 3)
#define XGBE_TX_DESC_MAX_PROC	(XGBE_TX_DESC_CNT >> 1)
#define XGBE_RX_DESC_CNT	512

#define XGBE_TX_MAX_BUF_SIZE	(0x3fff & ~(64 - 1))

/* Descriptors required for maximum contiguous TSO/GSO packet */
#define XGBE_TX_MAX_SPLIT	((GSO_MAX_SIZE / XGBE_TX_MAX_BUF_SIZE) + 1)

/* Maximum possible descriptors needed for an SKB:
 * - Maximum number of SKB frags
 * - Maximum descriptors for contiguous TSO/GSO packet
 * - Possible context descriptor
 * - Possible TSO header descriptor
 */
#define XGBE_TX_MAX_DESCS	(MAX_SKB_FRAGS + XGBE_TX_MAX_SPLIT + 2)

#define XGBE_RX_MIN_BUF_SIZE	(ETH_FRAME_LEN + ETH_FCS_LEN + VLAN_HLEN)
#define XGBE_RX_BUF_ALIGN	64
#define XGBE_SKB_ALLOC_SIZE	256
#define XGBE_SPH_HDSMS_SIZE	2	/* Keep in sync with SKB_ALLOC_SIZE */

#define XGBE_MAX_DMA_CHANNELS	16
#define XGBE_MAX_QUEUES		16
#define XGBE_DMA_STOP_TIMEOUT	5

/* DMA cache settings - Outer sharable, write-back, write-allocate */
#define XGBE_DMA_OS_AXDOMAIN	0x2
#define XGBE_DMA_OS_ARCACHE	0xb
#define XGBE_DMA_OS_AWCACHE	0xf

/* DMA cache settings - System, no caches used */
#define XGBE_DMA_SYS_AXDOMAIN	0x3
#define XGBE_DMA_SYS_ARCACHE	0x0
#define XGBE_DMA_SYS_AWCACHE	0x0

#define XGBE_DMA_INTERRUPT_MASK	0x31c7

#define XGMAC_MIN_PACKET	60
#define XGMAC_STD_PACKET_MTU	1500
#define XGMAC_MAX_STD_PACKET	1518
#define XGMAC_JUMBO_PACKET_MTU	9000
#define XGMAC_MAX_JUMBO_PACKET	9018

/* Common property names */
#define XGBE_MAC_ADDR_PROPERTY	"mac-address"
#define XGBE_PHY_MODE_PROPERTY	"phy-mode"
#define XGBE_DMA_IRQS_PROPERTY	"amd,per-channel-interrupt"
#define XGBE_SPEEDSET_PROPERTY	"amd,speed-set"
#define XGBE_BLWC_PROPERTY	"amd,serdes-blwc"
#define XGBE_CDR_RATE_PROPERTY	"amd,serdes-cdr-rate"
#define XGBE_PQ_SKEW_PROPERTY	"amd,serdes-pq-skew"
#define XGBE_TX_AMP_PROPERTY	"amd,serdes-tx-amp"
#define XGBE_DFE_CFG_PROPERTY	"amd,serdes-dfe-tap-config"
#define XGBE_DFE_ENA_PROPERTY	"amd,serdes-dfe-tap-enable"

/* Device-tree clock names */
#define XGBE_DMA_CLOCK		"dma_clk"
#define XGBE_PTP_CLOCK		"ptp_clk"

/* ACPI property names */
#define XGBE_ACPI_DMA_FREQ	"amd,dma-freq"
#define XGBE_ACPI_PTP_FREQ	"amd,ptp-freq"

/* Timestamp support - values based on 50MHz PTP clock
 *   50MHz => 20 nsec
 */
#define XGBE_TSTAMP_SSINC	20
#define XGBE_TSTAMP_SNSINC	0

/* Driver PMT macros */
#define XGMAC_DRIVER_CONTEXT	1
#define XGMAC_IOCTL_CONTEXT	2

#define XGBE_FIFO_MAX		81920

#define XGBE_TC_MIN_QUANTUM	10

/* Helper macro for descriptor handling
 *  Always use XGBE_GET_DESC_DATA to access the descriptor data
 *  since the index is free-running and needs to be and-ed
 *  with the descriptor count value of the ring to index to
 *  the proper descriptor data.
 */
#define XGBE_GET_DESC_DATA(_ring, _idx)				\
	((_ring)->rdata +					\
	 ((_idx) & ((_ring)->rdesc_count - 1)))

/* Default coalescing parameters */
#define XGMAC_INIT_DMA_TX_USECS		1000
#define XGMAC_INIT_DMA_TX_FRAMES	25

#define XGMAC_MAX_DMA_RIWT		0xff
#define XGMAC_INIT_DMA_RX_USECS		30
#define XGMAC_INIT_DMA_RX_FRAMES	25

/* Flow control queue count */
#define XGMAC_MAX_FLOW_CONTROL_QUEUES	8

/* Maximum MAC address hash table size (256 bits = 8 bytes) */
#define XGBE_MAC_HASH_TABLE_SIZE	8

/* Receive Side Scaling */
#define XGBE_RSS_HASH_KEY_SIZE		40
#define XGBE_RSS_MAX_TABLE_SIZE		256
#define XGBE_RSS_LOOKUP_TABLE_TYPE	0
#define XGBE_RSS_HASH_KEY_TYPE		1

/* Auto-negotiation */
#define XGBE_AN_MS_TIMEOUT		500
#define XGBE_LINK_TIMEOUT		10

#define XGBE_AN_INT_CMPLT		0x01
#define XGBE_AN_INC_LINK		0x02
#define XGBE_AN_PG_RCV			0x04
#define XGBE_AN_INT_MASK		0x07

/* Rate-change complete wait/retry count */
#define XGBE_RATECHANGE_COUNT		500

/* Default SerDes settings */
#define XGBE_SPEED_10000_BLWC		0
#define XGBE_SPEED_10000_CDR		0x7
#define XGBE_SPEED_10000_PLL		0x1
#define XGBE_SPEED_10000_PQ		0x12
#define XGBE_SPEED_10000_RATE		0x0
#define XGBE_SPEED_10000_TXAMP		0xa
#define XGBE_SPEED_10000_WORD		0x7
#define XGBE_SPEED_10000_DFE_TAP_CONFIG	0x1
#define XGBE_SPEED_10000_DFE_TAP_ENABLE	0x7f

#define XGBE_SPEED_2500_BLWC		1
#define XGBE_SPEED_2500_CDR		0x2
#define XGBE_SPEED_2500_PLL		0x0
#define XGBE_SPEED_2500_PQ		0xa
#define XGBE_SPEED_2500_RATE		0x1
#define XGBE_SPEED_2500_TXAMP		0xf
#define XGBE_SPEED_2500_WORD		0x1
#define XGBE_SPEED_2500_DFE_TAP_CONFIG	0x3
#define XGBE_SPEED_2500_DFE_TAP_ENABLE	0x0

#define XGBE_SPEED_1000_BLWC		1
#define XGBE_SPEED_1000_CDR		0x2
#define XGBE_SPEED_1000_PLL		0x0
#define XGBE_SPEED_1000_PQ		0xa
#define XGBE_SPEED_1000_RATE		0x3
#define XGBE_SPEED_1000_TXAMP		0xf
#define XGBE_SPEED_1000_WORD		0x1
#define XGBE_SPEED_1000_DFE_TAP_CONFIG	0x3
#define XGBE_SPEED_1000_DFE_TAP_ENABLE	0x0

struct xgbe_prv_data;

struct xgbe_packet_data {
	struct sk_buff *skb;

	unsigned int attributes;

	unsigned int errors;

	unsigned int rdesc_count;
	unsigned int length;

	unsigned int header_len;
	unsigned int tcp_header_len;
	unsigned int tcp_payload_len;
	unsigned short mss;

	unsigned short vlan_ctag;

	u64 rx_tstamp;

	u32 rss_hash;
	enum pkt_hash_types rss_hash_type;

	unsigned int tx_packets;
	unsigned int tx_bytes;
};

/* Common Rx and Tx descriptor mapping */
struct xgbe_ring_desc {
	__le32 desc0;
	__le32 desc1;
	__le32 desc2;
	__le32 desc3;
};

/* Page allocation related values */<