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Gerhard Englederdavem330
Gerhard Engleder
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davem330
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tsnep: Add TSN endpoint Ethernet MAC driver
The TSN endpoint Ethernet MAC is a FPGA based network device for real-time communication. It is integrated as Ethernet controller with ethtool and PTP support. For real-time communcation TC_SETUP_QDISC_TAPRIO is supported. Signed-off-by: Gerhard Engleder <[email protected]> Signed-off-by: David S. Miller <[email protected]>
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‎drivers/net/ethernet/Kconfig

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@@ -73,6 +73,7 @@ config DNET
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source "drivers/net/ethernet/dec/Kconfig"
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source "drivers/net/ethernet/dlink/Kconfig"
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source "drivers/net/ethernet/emulex/Kconfig"
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source "drivers/net/ethernet/engleder/Kconfig"
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source "drivers/net/ethernet/ezchip/Kconfig"
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source "drivers/net/ethernet/faraday/Kconfig"
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source "drivers/net/ethernet/freescale/Kconfig"

‎drivers/net/ethernet/Makefile

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@@ -36,6 +36,7 @@ obj-$(CONFIG_DNET) += dnet.o
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obj-$(CONFIG_NET_VENDOR_DEC) += dec/
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obj-$(CONFIG_NET_VENDOR_DLINK) += dlink/
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obj-$(CONFIG_NET_VENDOR_EMULEX) += emulex/
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obj-$(CONFIG_NET_VENDOR_ENGLEDER) += engleder/
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obj-$(CONFIG_NET_VENDOR_EZCHIP) += ezchip/
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obj-$(CONFIG_NET_VENDOR_FARADAY) += faraday/
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obj-$(CONFIG_NET_VENDOR_FREESCALE) += freescale/

‎drivers/net/ethernet/engleder/Kconfig

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# SPDX-License-Identifier: GPL-2.0
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#
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# Engleder network device configuration
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#
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config NET_VENDOR_ENGLEDER
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bool "Engleder devices"
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default y
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help
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If you have a network (Ethernet) card belonging to this class, say Y.
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Note that the answer to this question doesn't directly affect the
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kernel: saying N will just cause the configurator to skip all
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the questions about Engleder devices. If you say Y, you will be asked
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for your specific card in the following questions.
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if NET_VENDOR_ENGLEDER
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config TSNEP
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tristate "TSN endpoint support"
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depends on PTP_1588_CLOCK_OPTIONAL
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select PHYLIB
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help
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Support for the Engleder TSN endpoint Ethernet MAC IP Core.
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To compile this driver as a module, choose M here. The module will be
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called tsnep.
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config TSNEP_SELFTESTS
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bool "TSN endpoint self test support"
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default n
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depends on TSNEP
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help
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This enables self test support within the TSN endpoint driver.
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If unsure, say N.
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endif # NET_VENDOR_ENGLEDER

‎drivers/net/ethernet/engleder/Makefile

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# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for the Engleder Ethernet drivers
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#
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obj-$(CONFIG_TSNEP) += tsnep.o
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tsnep-objs := tsnep_main.o tsnep_ethtool.o tsnep_ptp.o tsnep_tc.o \
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$(tsnep-y)
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tsnep-$(CONFIG_TSNEP_SELFTESTS) += tsnep_selftests.o

‎drivers/net/ethernet/engleder/tsnep.h

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/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (C) 2021 Gerhard Engleder <[email protected]> */
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#ifndef _TSNEP_H
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#define _TSNEP_H
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#include "tsnep_hw.h"
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <linux/etherdevice.h>
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#include <linux/phy.h>
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#include <linux/ethtool.h>
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#include <linux/net_tstamp.h>
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#include <linux/ptp_clock_kernel.h>
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#include <linux/miscdevice.h>
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#define TSNEP "tsnep"
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#define TSNEP_RING_SIZE 256
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#define TSNEP_RING_ENTRIES_PER_PAGE (PAGE_SIZE / TSNEP_DESC_SIZE)
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#define TSNEP_RING_PAGE_COUNT (TSNEP_RING_SIZE / TSNEP_RING_ENTRIES_PER_PAGE)
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#define TSNEP_QUEUES 1
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struct tsnep_gcl {
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void __iomem *addr;
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u64 base_time;
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u64 cycle_time;
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u64 cycle_time_extension;
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struct tsnep_gcl_operation operation[TSNEP_GCL_COUNT];
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int count;
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u64 change_limit;
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u64 start_time;
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bool change;
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};
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struct tsnep_tx_entry {
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struct tsnep_tx_desc *desc;
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struct tsnep_tx_desc_wb *desc_wb;
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dma_addr_t desc_dma;
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bool owner_user_flag;
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u32 properties;
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struct sk_buff *skb;
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size_t len;
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DEFINE_DMA_UNMAP_ADDR(dma);
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};
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struct tsnep_tx {
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struct tsnep_adapter *adapter;
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void __iomem *addr;
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void *page[TSNEP_RING_PAGE_COUNT];
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dma_addr_t page_dma[TSNEP_RING_PAGE_COUNT];
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/* TX ring lock */
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spinlock_t lock;
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struct tsnep_tx_entry entry[TSNEP_RING_SIZE];
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int write;
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int read;
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u32 owner_counter;
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int increment_owner_counter;
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u32 packets;
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u32 bytes;
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u32 dropped;
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};
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struct tsnep_rx_entry {
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struct tsnep_rx_desc *desc;
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struct tsnep_rx_desc_wb *desc_wb;
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dma_addr_t desc_dma;
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u32 properties;
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struct sk_buff *skb;
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size_t len;
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DEFINE_DMA_UNMAP_ADDR(dma);
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};
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struct tsnep_rx {
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struct tsnep_adapter *adapter;
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void __iomem *addr;
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void *page[TSNEP_RING_PAGE_COUNT];
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dma_addr_t page_dma[TSNEP_RING_PAGE_COUNT];
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struct tsnep_rx_entry entry[TSNEP_RING_SIZE];
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int read;
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u32 owner_counter;
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int increment_owner_counter;
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u32 packets;
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u32 bytes;
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u32 dropped;
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u32 multicast;
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};
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struct tsnep_queue {
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struct tsnep_adapter *adapter;
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struct tsnep_tx *tx;
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struct tsnep_rx *rx;
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struct napi_struct napi;
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u32 irq_mask;
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};
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struct tsnep_adapter {
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struct net_device *netdev;
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u8 mac_address[ETH_ALEN];
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struct mii_bus *mdiobus;
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bool suppress_preamble;
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phy_interface_t phy_mode;
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struct phy_device *phydev;
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int msg_enable;
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struct platform_device *pdev;
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struct device *dmadev;
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void __iomem *addr;
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unsigned long size;
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int irq;
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bool gate_control;
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/* gate control lock */
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struct mutex gate_control_lock;
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bool gate_control_active;
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struct tsnep_gcl gcl[2];
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int next_gcl;
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struct hwtstamp_config hwtstamp_config;
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struct ptp_clock *ptp_clock;
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struct ptp_clock_info ptp_clock_info;
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/* ptp clock lock */
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spinlock_t ptp_lock;
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int num_tx_queues;
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struct tsnep_tx tx[TSNEP_MAX_QUEUES];
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int num_rx_queues;
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struct tsnep_rx rx[TSNEP_MAX_QUEUES];
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int num_queues;
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struct tsnep_queue queue[TSNEP_MAX_QUEUES];
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};
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extern const struct ethtool_ops tsnep_ethtool_ops;
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int tsnep_ptp_init(struct tsnep_adapter *adapter);
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void tsnep_ptp_cleanup(struct tsnep_adapter *adapter);
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int tsnep_ptp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
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int tsnep_tc_init(struct tsnep_adapter *adapter);
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void tsnep_tc_cleanup(struct tsnep_adapter *adapter);
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int tsnep_tc_setup(struct net_device *netdev, enum tc_setup_type type,
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void *type_data);
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#if IS_ENABLED(CONFIG_TSNEP_SELFTESTS)
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int tsnep_ethtool_get_test_count(void);
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void tsnep_ethtool_get_test_strings(u8 *data);
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void tsnep_ethtool_self_test(struct net_device *netdev,
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struct ethtool_test *eth_test, u64 *data);
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#else
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static inline int tsnep_ethtool_get_test_count(void)
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{
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return -EOPNOTSUPP;
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}
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static inline void tsnep_ethtool_get_test_strings(u8 *data)
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{
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/* not enabled */
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}
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static inline void tsnep_ethtool_self_test(struct net_device *dev,
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struct ethtool_test *eth_test,
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u64 *data)
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{
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/* not enabled */
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}
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#endif /* CONFIG_TSNEP_SELFTESTS */
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void tsnep_get_system_time(struct tsnep_adapter *adapter, u64 *time);
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#endif /* _TSNEP_H */

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