// SPDX-License-Identifier: GPL-2.0 /* Ethernet device driver for Cortina Systems Gemini SoC * Also known as the StorLink SL3512 and SL3516 (SL351x) or Lepus * Net Engine and Gigabit Ethernet MAC (GMAC) * This hardware contains a TCP Offload Engine (TOE) but currently the * driver does not make use of it. * * Authors: * Linus Walleij <[email protected]> * Tobias Waldvogel <[email protected]> (OpenWRT) * Michał Mirosław <[email protected]> * Paulius Zaleckas <[email protected]> * Giuseppe De Robertis <[email protected]> * Gary Chen & Ch Hsu Storlink Semiconductor */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/spinlock.h> #include <linux/slab.h> #include <linux/dma-mapping.h> #include <linux/cache.h> #include <linux/interrupt.h> #include <linux/reset.h> #include <linux/clk.h> #include <linux/of.h> #include <linux/of_mdio.h> #include <linux/of_net.h> #include <linux/of_platform.h> #include <linux/etherdevice.h> #include <linux/if_vlan.h> #include <linux/skbuff.h> #include <linux/phy.h> #include <linux/crc32.h> #include <linux/ethtool.h> #include <linux/tcp.h> #include <linux/u64_stats_sync.h> #include <linux/in.h> #include <linux/ip.h> #include <linux/ipv6.h> #include "gemini.h" #define DRV_NAME … #define DEFAULT_MSG_ENABLE … static int debug = …; module_param(debug, int, 0); MODULE_PARM_DESC(…) …; #define HSIZE_8 … #define HSIZE_16 … #define HSIZE_32 … #define HBURST_SINGLE … #define HBURST_INCR … #define HBURST_INCR4 … #define HBURST_INCR8 … #define HPROT_DATA_CACHE … #define HPROT_PRIVILIGED … #define HPROT_BUFFERABLE … #define HPROT_CACHABLE … #define DEFAULT_RX_COALESCE_NSECS … #define DEFAULT_GMAC_RXQ_ORDER … #define DEFAULT_GMAC_TXQ_ORDER … #define DEFAULT_RX_BUF_ORDER … #define TX_MAX_FRAGS … #define TX_QUEUE_NUM … #define RX_MAX_ALLOC_ORDER … #define GMAC0_IRQ0_2 … #define GMAC0_IRQ0_TXQ0_INTS … #define GMAC0_IRQ4_8 … #define GMAC_OFFLOAD_FEATURES … /** * struct gmac_queue_page - page buffer per-page info * @page: the page struct * @mapping: the dma address handle */ struct gmac_queue_page { … }; struct gmac_txq { … }; struct gemini_ethernet; struct gemini_ethernet_port { … }; struct gemini_ethernet { … }; #define GMAC_STATS_NUM … static const char gmac_stats_strings[GMAC_STATS_NUM][ETH_GSTRING_LEN] = …; static void gmac_dump_dma_state(struct net_device *netdev); static void gmac_update_config0_reg(struct net_device *netdev, u32 val, u32 vmask) { … } static void gmac_enable_tx_rx(struct net_device *netdev) { … } static void gmac_disable_tx_rx(struct net_device *netdev) { … } static void gmac_set_flow_control(struct net_device *netdev, bool tx, bool rx) { … } static void gmac_adjust_link(struct net_device *netdev) { … } static int gmac_setup_phy(struct net_device *netdev) { … } /* The maximum frame length is not logically enumerated in the * hardware, so we do a table lookup to find the applicable max * frame length. */ struct gmac_max_framelen { … }; static const struct gmac_max_framelen gmac_maxlens[] = …; static int gmac_pick_rx_max_len(unsigned int max_l3_len) { … } static int gmac_init(struct net_device *netdev) { … } static int gmac_setup_txqs(struct net_device *netdev) { … } static void gmac_clean_txq(struct net_device *netdev, struct gmac_txq *txq, unsigned int r) { … } static void gmac_cleanup_txqs(struct net_device *netdev) { … } static int gmac_setup_rxq(struct net_device *netdev) { … } static struct gmac_queue_page * gmac_get_queue_page(struct gemini_ethernet *geth, struct gemini_ethernet_port *port, dma_addr_t addr) { … } static void gmac_cleanup_rxq(struct net_device *netdev) { … } static struct page *geth_freeq_alloc_map_page(struct gemini_ethernet *geth, int pn) { … } /** * geth_fill_freeq() - Fill the freeq with empty fragments to use * @geth: the ethernet adapter * @refill: whether to reset the queue by filling in all freeq entries or * just refill it, usually the interrupt to refill the queue happens when * the queue is half empty. */ static unsigned int geth_fill_freeq(struct gemini_ethernet *geth, bool refill) { … } static int geth_setup_freeq(struct gemini_ethernet *geth) { … } /** * geth_cleanup_freeq() - cleanup the DMA mappings and free the queue * @geth: the Gemini global ethernet state */ static void geth_cleanup_freeq(struct gemini_ethernet *geth) { … } /** * geth_resize_freeq() - resize the software queue depth * @port: the port requesting the change * * This gets called at least once during probe() so the device queue gets * "resized" from the hardware defaults. Since both ports/net devices share * the same hardware queue, some synchronization between the ports is * needed. */ static int geth_resize_freeq(struct gemini_ethernet_port *port) { … } static void gmac_tx_irq_enable(struct net_device *netdev, unsigned int txq, int en) { … } static void gmac_tx_irq(struct net_device *netdev, unsigned int txq_num) { … } static int gmac_map_tx_bufs(struct net_device *netdev, struct sk_buff *skb, struct gmac_txq *txq, unsigned short *desc) { … } static netdev_tx_t gmac_start_xmit(struct sk_buff *skb, struct net_device *netdev) { … } static void gmac_tx_timeout(struct net_device *netdev, unsigned int txqueue) { … } static void gmac_enable_irq(struct net_device *netdev, int enable) { … } static void gmac_enable_rx_irq(struct net_device *netdev, int enable) { … } static struct sk_buff *gmac_skb_if_good_frame(struct gemini_ethernet_port *port, union gmac_rxdesc_0 word0, unsigned int frame_len) { … } static unsigned int gmac_rx(struct net_device *netdev, unsigned int budget) { … } static int gmac_napi_poll(struct napi_struct *napi, int budget) { … } static void gmac_dump_dma_state(struct net_device *netdev) { … } static void gmac_update_hw_stats(struct net_device *netdev) { … } /** * gmac_get_intr_flags() - get interrupt status flags for a port from * @netdev: the net device for the port to get flags from * @i: the interrupt status register 0..4 */ static u32 gmac_get_intr_flags(struct net_device *netdev, int i) { … } static enum hrtimer_restart gmac_coalesce_delay_expired(struct hrtimer *timer) { … } static irqreturn_t gmac_irq(int irq, void *data) { … } static void gmac_start_dma(struct gemini_ethernet_port *port) { … } static void gmac_stop_dma(struct gemini_ethernet_port *port) { … } static int gmac_open(struct net_device *netdev) { … } static int gmac_stop(struct net_device *netdev) { … } static void gmac_set_rx_mode(struct net_device *netdev) { … } static void gmac_write_mac_address(struct net_device *netdev) { … } static int gmac_set_mac_address(struct net_device *netdev, void *addr) { … } static void gmac_clear_hw_stats(struct net_device *netdev) { … } static void gmac_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats) { … } static int gmac_change_mtu(struct net_device *netdev, int new_mtu) { … } static int gmac_set_features(struct net_device *netdev, netdev_features_t features) { … } static int gmac_get_sset_count(struct net_device *netdev, int sset) { … } static void gmac_get_strings(struct net_device *netdev, u32 stringset, u8 *data) { … } static void gmac_get_ethtool_stats(struct net_device *netdev, struct ethtool_stats *estats, u64 *values) { … } static int gmac_get_ksettings(struct net_device *netdev, struct ethtool_link_ksettings *cmd) { … } static int gmac_set_ksettings(struct net_device *netdev, const struct ethtool_link_ksettings *cmd) { … } static int gmac_nway_reset(struct net_device *netdev) { … } static void gmac_get_pauseparam(struct net_device *netdev, struct ethtool_pauseparam *pparam) { … } static int gmac_set_pauseparam(struct net_device *netdev, struct ethtool_pauseparam *pparam) { … } static void gmac_get_ringparam(struct net_device *netdev, struct ethtool_ringparam *rp, struct kernel_ethtool_ringparam *kernel_rp, struct netlink_ext_ack *extack) { … } static int gmac_set_ringparam(struct net_device *netdev, struct ethtool_ringparam *rp, struct kernel_ethtool_ringparam *kernel_rp, struct netlink_ext_ack *extack) { … } static int gmac_get_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd, struct kernel_ethtool_coalesce *kernel_coal, struct netlink_ext_ack *extack) { … } static int gmac_set_coalesce(struct net_device *netdev, struct ethtool_coalesce *ecmd, struct kernel_ethtool_coalesce *kernel_coal, struct netlink_ext_ack *extack) { … } static u32 gmac_get_msglevel(struct net_device *netdev) { … } static void gmac_set_msglevel(struct net_device *netdev, u32 level) { … } static void gmac_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info) { … } static const struct net_device_ops gmac_351x_ops = …; static const struct ethtool_ops gmac_351x_ethtool_ops = …; static irqreturn_t gemini_port_irq_thread(int irq, void *data) { … } static irqreturn_t gemini_port_irq(int irq, void *data) { … } static void gemini_port_remove(struct gemini_ethernet_port *port) { … } static void gemini_ethernet_init(struct gemini_ethernet *geth) { … } static void gemini_port_save_mac_addr(struct gemini_ethernet_port *port) { … } static int gemini_ethernet_port_probe(struct platform_device *pdev) { … } static void gemini_ethernet_port_remove(struct platform_device *pdev) { … } static const struct of_device_id gemini_ethernet_port_of_match[] = …; MODULE_DEVICE_TABLE(of, gemini_ethernet_port_of_match); static struct platform_driver gemini_ethernet_port_driver = …; static int gemini_ethernet_probe(struct platform_device *pdev) { … } static void gemini_ethernet_remove(struct platform_device *pdev) { … } static const struct of_device_id gemini_ethernet_of_match[] = …; MODULE_DEVICE_TABLE(of, gemini_ethernet_of_match); static struct platform_driver gemini_ethernet_driver = …; static int __init gemini_ethernet_module_init(void) { … } module_init(…) …; static void __exit gemini_ethernet_module_exit(void) { … } module_exit(gemini_ethernet_module_exit); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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