diff options
Diffstat (limited to 'drivers/net/ethernet/engleder/tsnep.h')
| -rw-r--r-- | drivers/net/ethernet/engleder/tsnep.h | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/drivers/net/ethernet/engleder/tsnep.h b/drivers/net/ethernet/engleder/tsnep.h new file mode 100644 index 0000000000..f188fba021 --- /dev/null +++ b/drivers/net/ethernet/engleder/tsnep.h @@ -0,0 +1,260 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2021 Gerhard Engleder <gerhard@engleder-embedded.com> */ + +#ifndef _TSNEP_H +#define _TSNEP_H + +#include "tsnep_hw.h" + +#include <linux/platform_device.h> +#include <linux/dma-mapping.h> +#include <linux/etherdevice.h> +#include <linux/phy.h> +#include <linux/ethtool.h> +#include <linux/net_tstamp.h> +#include <linux/ptp_clock_kernel.h> +#include <linux/miscdevice.h> +#include <net/xdp.h> + +#define TSNEP "tsnep" + +#define TSNEP_RING_SIZE 256 +#define TSNEP_RING_MASK (TSNEP_RING_SIZE - 1) +#define TSNEP_RING_RX_REFILL 16 +#define TSNEP_RING_RX_REUSE (TSNEP_RING_SIZE - TSNEP_RING_SIZE / 4) +#define TSNEP_RING_ENTRIES_PER_PAGE (PAGE_SIZE / TSNEP_DESC_SIZE) +#define TSNEP_RING_PAGE_COUNT (TSNEP_RING_SIZE / TSNEP_RING_ENTRIES_PER_PAGE) + +struct tsnep_gcl { + void __iomem *addr; + + u64 base_time; + u64 cycle_time; + u64 cycle_time_extension; + + struct tsnep_gcl_operation operation[TSNEP_GCL_COUNT]; + int count; + + u64 change_limit; + + u64 start_time; + bool change; +}; + +enum tsnep_rxnfc_filter_type { + TSNEP_RXNFC_ETHER_TYPE, +}; + +struct tsnep_rxnfc_filter { + enum tsnep_rxnfc_filter_type type; + union { + u16 ether_type; + }; +}; + +struct tsnep_rxnfc_rule { + struct list_head list; + struct tsnep_rxnfc_filter filter; + int queue_index; + int location; +}; + +struct tsnep_tx_entry { + struct tsnep_tx_desc *desc; + struct tsnep_tx_desc_wb *desc_wb; + dma_addr_t desc_dma; + bool owner_user_flag; + + u32 properties; + + u32 type; + union { + struct sk_buff *skb; + struct xdp_frame *xdpf; + bool zc; + }; + size_t len; + DEFINE_DMA_UNMAP_ADDR(dma); +}; + +struct tsnep_tx { + struct tsnep_adapter *adapter; + void __iomem *addr; + int queue_index; + + void *page[TSNEP_RING_PAGE_COUNT]; + dma_addr_t page_dma[TSNEP_RING_PAGE_COUNT]; + + struct tsnep_tx_entry entry[TSNEP_RING_SIZE]; + int write; + int read; + u32 owner_counter; + int increment_owner_counter; + struct xsk_buff_pool *xsk_pool; + + u32 packets; + u32 bytes; + u32 dropped; +}; + +struct tsnep_rx_entry { + struct tsnep_rx_desc *desc; + struct tsnep_rx_desc_wb *desc_wb; + dma_addr_t desc_dma; + + u32 properties; + + union { + struct page *page; + struct xdp_buff *xdp; + }; + size_t len; + dma_addr_t dma; +}; + +struct tsnep_rx { + struct tsnep_adapter *adapter; + void __iomem *addr; + int queue_index; + int tx_queue_index; + + void *page[TSNEP_RING_PAGE_COUNT]; + dma_addr_t page_dma[TSNEP_RING_PAGE_COUNT]; + + struct tsnep_rx_entry entry[TSNEP_RING_SIZE]; + int write; + int read; + u32 owner_counter; + int increment_owner_counter; + struct page_pool *page_pool; + struct page **page_buffer; + struct xsk_buff_pool *xsk_pool; + struct xdp_buff **xdp_batch; + + u32 packets; + u32 bytes; + u32 dropped; + u32 multicast; + u32 alloc_failed; + + struct xdp_rxq_info xdp_rxq; + struct xdp_rxq_info xdp_rxq_zc; +}; + +struct tsnep_queue { + struct tsnep_adapter *adapter; + char name[IFNAMSIZ + 16]; + + struct tsnep_tx *tx; + struct tsnep_rx *rx; + + struct napi_struct napi; + + int irq; + u32 irq_mask; + void __iomem *irq_delay_addr; + u8 irq_delay; +}; + +struct tsnep_adapter { + struct net_device *netdev; + u8 mac_address[ETH_ALEN]; + struct mii_bus *mdiobus; + bool suppress_preamble; + phy_interface_t phy_mode; + struct phy_device *phydev; + int msg_enable; + + struct platform_device *pdev; + struct device *dmadev; + void __iomem *addr; + + bool gate_control; + /* gate control lock */ + struct mutex gate_control_lock; + bool gate_control_active; + struct tsnep_gcl gcl[2]; + int next_gcl; + + struct hwtstamp_config hwtstamp_config; + struct ptp_clock *ptp_clock; + struct ptp_clock_info ptp_clock_info; + /* ptp clock lock */ + spinlock_t ptp_lock; + + /* RX flow classification rules lock */ + struct mutex rxnfc_lock; + struct list_head rxnfc_rules; + int rxnfc_count; + int rxnfc_max; + + struct bpf_prog *xdp_prog; + + int num_tx_queues; + struct tsnep_tx tx[TSNEP_MAX_QUEUES]; + int num_rx_queues; + struct tsnep_rx rx[TSNEP_MAX_QUEUES]; + + int num_queues; + struct tsnep_queue queue[TSNEP_MAX_QUEUES]; +}; + +extern const struct ethtool_ops tsnep_ethtool_ops; + +int tsnep_ptp_init(struct tsnep_adapter *adapter); +void tsnep_ptp_cleanup(struct tsnep_adapter *adapter); +int tsnep_ptp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd); + +int tsnep_tc_init(struct tsnep_adapter *adapter); +void tsnep_tc_cleanup(struct tsnep_adapter *adapter); +int tsnep_tc_setup(struct net_device *netdev, enum tc_setup_type type, + void *type_data); + +int tsnep_rxnfc_init(struct tsnep_adapter *adapter); +void tsnep_rxnfc_cleanup(struct tsnep_adapter *adapter); +int tsnep_rxnfc_get_rule(struct tsnep_adapter *adapter, + struct ethtool_rxnfc *cmd); +int tsnep_rxnfc_get_all(struct tsnep_adapter *adapter, + struct ethtool_rxnfc *cmd, + u32 *rule_locs); +int tsnep_rxnfc_add_rule(struct tsnep_adapter *adapter, + struct ethtool_rxnfc *cmd); +int tsnep_rxnfc_del_rule(struct tsnep_adapter *adapter, + struct ethtool_rxnfc *cmd); + +int tsnep_xdp_setup_prog(struct tsnep_adapter *adapter, struct bpf_prog *prog, + struct netlink_ext_ack *extack); +int tsnep_xdp_setup_pool(struct tsnep_adapter *adapter, + struct xsk_buff_pool *pool, u16 queue_id); + +#if IS_ENABLED(CONFIG_TSNEP_SELFTESTS) +int tsnep_ethtool_get_test_count(void); +void tsnep_ethtool_get_test_strings(u8 *data); +void tsnep_ethtool_self_test(struct net_device *netdev, + struct ethtool_test *eth_test, u64 *data); +#else +static inline int tsnep_ethtool_get_test_count(void) +{ + return -EOPNOTSUPP; +} + +static inline void tsnep_ethtool_get_test_strings(u8 *data) +{ + /* not enabled */ +} + +static inline void tsnep_ethtool_self_test(struct net_device *dev, + struct ethtool_test *eth_test, + u64 *data) +{ + /* not enabled */ +} +#endif /* CONFIG_TSNEP_SELFTESTS */ + +void tsnep_get_system_time(struct tsnep_adapter *adapter, u64 *time); +int tsnep_set_irq_coalesce(struct tsnep_queue *queue, u32 usecs); +u32 tsnep_get_irq_coalesce(struct tsnep_queue *queue); +int tsnep_enable_xsk(struct tsnep_queue *queue, struct xsk_buff_pool *pool); +void tsnep_disable_xsk(struct tsnep_queue *queue); + +#endif /* _TSNEP_H */ |