// 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 <linus.walleij@linaro.org> * Tobias Waldvogel <tobias.waldvogel@gmail.com> (OpenWRT) * Michał Mirosław <mirq-linux@rere.qmqm.pl> * Paulius Zaleckas <paulius.zaleckas@gmail.com> * Giuseppe De Robertis <Giuseppe.DeRobertis@ba.infn.it> * 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 "gmac-gemini" #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK) static int debug = -1; module_param(debug, int, 0); MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); #define HSIZE_8 0x00 #define HSIZE_16 0x01 #define HSIZE_32 0x02 #define HBURST_SINGLE 0x00 #define HBURST_INCR 0x01 #define HBURST_INCR4 0x02 #define HBURST_INCR8 0x03 #define HPROT_DATA_CACHE BIT(0) #define HPROT_PRIVILIGED BIT(1) #define HPROT_BUFFERABLE BIT(2) #define HPROT_CACHABLE BIT(3) #define DEFAULT_RX_COALESCE_NSECS 0 #define DEFAULT_GMAC_RXQ_ORDER 9 #define DEFAULT_GMAC_TXQ_ORDER 8 #define DEFAULT_RX_BUF_ORDER 11 #define DEFAULT_NAPI_WEIGHT 64 #define TX_MAX_FRAGS 16 #define TX_QUEUE_NUM 1 /* max: 6 */ #define RX_MAX_ALLOC_ORDER 2 #define GMAC0_IRQ0_2 (GMAC0_TXDERR_INT_BIT | GMAC0_TXPERR_INT_BIT | \ <------><------> GMAC0_RXDERR_INT_BIT | GMAC0_RXPERR_INT_BIT) #define GMAC0_IRQ0_TXQ0_INTS (GMAC0_SWTQ00_EOF_INT_BIT | \ <------><------><------> GMAC0_SWTQ00_FIN_INT_BIT) #define GMAC0_IRQ4_8 (GMAC0_MIB_INT_BIT | GMAC0_RX_OVERRUN_INT_BIT) #define GMAC_OFFLOAD_FEATURES (NETIF_F_SG | NETIF_F_IP_CSUM | \ <------><------>NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM | \ <------><------>NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) /** * struct gmac_queue_page - page buffer per-page info * @page: the page struct * @mapping: the dma address handle */ struct gmac_queue_page { <------>struct page *page; <------>dma_addr_t mapping; }; struct gmac_txq { <------>struct gmac_txdesc *ring; <------>struct sk_buff **skb; <------>unsigned int cptr; <------>unsigned int noirq_packets; }; struct gemini_ethernet; struct gemini_ethernet_port { <------>u8 id; /* 0 or 1 */ <------>struct gemini_ethernet *geth; <------>struct net_device *netdev; <------>struct device *dev; <------>void __iomem *dma_base; <------>void __iomem *gmac_base; <------>struct clk *pclk; <------>struct reset_control *reset; <------>int irq; <------>__le32 mac_addr[3]; <------>void __iomem *rxq_rwptr; <------>struct gmac_rxdesc *rxq_ring; <------>unsigned int rxq_order; <------>struct napi_struct napi; <------>struct hrtimer rx_coalesce_timer; <------>unsigned int rx_coalesce_nsecs; <------>unsigned int freeq_refill; <------>struct gmac_txq txq[TX_QUEUE_NUM]; <------>unsigned int txq_order; <------>unsigned int irq_every_tx_packets; <------>dma_addr_t rxq_dma_base; <------>dma_addr_t txq_dma_base; <------>unsigned int msg_enable; <------>spinlock_t config_lock; /* Locks config register */ <------>struct u64_stats_sync tx_stats_syncp; <------>struct u64_stats_sync rx_stats_syncp; <------>struct u64_stats_sync ir_stats_syncp; <------>struct rtnl_link_stats64 stats; <------>u64 hw_stats[RX_STATS_NUM]; <------>u64 rx_stats[RX_STATUS_NUM]; <------>u64 rx_csum_stats[RX_CHKSUM_NUM]; <------>u64 rx_napi_exits; <------>u64 tx_frag_stats[TX_MAX_FRAGS]; <------>u64 tx_frags_linearized; <------>u64 tx_hw_csummed; }; struct gemini_ethernet { <------>struct device *dev; <------>void __iomem *base; <------>struct gemini_ethernet_port *port0; <------>struct gemini_ethernet_port *port1; <------>bool initialized; <------>spinlock_t irq_lock; /* Locks IRQ-related registers */ <------>unsigned int freeq_order; <------>unsigned int freeq_frag_order; <------>struct gmac_rxdesc *freeq_ring; <------>dma_addr_t freeq_dma_base; <------>struct gmac_queue_page *freeq_pages; <------>unsigned int num_freeq_pages; <------>spinlock_t freeq_lock; /* Locks queue from reentrance */ }; #define GMAC_STATS_NUM ( \ <------>RX_STATS_NUM + RX_STATUS_NUM + RX_CHKSUM_NUM + 1 + \ <------>TX_MAX_FRAGS + 2) static const char gmac_stats_strings[GMAC_STATS_NUM][ETH_GSTRING_LEN] = { <------>"GMAC_IN_DISCARDS", <------>"GMAC_IN_ERRORS", <------>"GMAC_IN_MCAST", <------>"GMAC_IN_BCAST", <------>"GMAC_IN_MAC1", <------>"GMAC_IN_MAC2", <------>"RX_STATUS_GOOD_FRAME", <------>"RX_STATUS_TOO_LONG_GOOD_CRC", <------>"RX_STATUS_RUNT_FRAME", <------>"RX_STATUS_SFD_NOT_FOUND", <------>"RX_STATUS_CRC_ERROR", <------>"RX_STATUS_TOO_LONG_BAD_CRC", <------>"RX_STATUS_ALIGNMENT_ERROR", <------>"RX_STATUS_TOO_LONG_BAD_ALIGN", <------>"RX_STATUS_RX_ERR", <------>"RX_STATUS_DA_FILTERED", <------>"RX_STATUS_BUFFER_FULL", <------>"RX_STATUS_11", <------>"RX_STATUS_12", <------>"RX_STATUS_13", <------>"RX_STATUS_14", <------>"RX_STATUS_15", <------>"RX_CHKSUM_IP_UDP_TCP_OK", <------>"RX_CHKSUM_IP_OK_ONLY", <------>"RX_CHKSUM_NONE", <------>"RX_CHKSUM_3", <------>"RX_CHKSUM_IP_ERR_UNKNOWN", <------>"RX_CHKSUM_IP_ERR", <------>"RX_CHKSUM_TCP_UDP_ERR", <------>"RX_CHKSUM_7", <------>"RX_NAPI_EXITS", <------>"TX_FRAGS[1]", <------>"TX_FRAGS[2]", <------>"TX_FRAGS[3]", <------>"TX_FRAGS[4]", <------>"TX_FRAGS[5]", <------>"TX_FRAGS[6]", <------>"TX_FRAGS[7]", <------>"TX_FRAGS[8]", <------>"TX_FRAGS[9]", <------>"TX_FRAGS[10]", <------>"TX_FRAGS[11]", <------>"TX_FRAGS[12]", <------>"TX_FRAGS[13]", <------>"TX_FRAGS[14]", <------>"TX_FRAGS[15]", <------>"TX_FRAGS[16+]", <------>"TX_FRAGS_LINEARIZED", <------>"TX_HW_CSUMMED", }; static void gmac_dump_dma_state(struct net_device *netdev); static void gmac_update_config0_reg(struct net_device *netdev, <------><------><------><------> u32 val, u32 vmask) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>unsigned long flags; <------>u32 reg; <------>spin_lock_irqsave(&port->config_lock, flags); <------>reg = readl(port->gmac_base + GMAC_CONFIG0); <------>reg = (reg & ~vmask) | val; <------>writel(reg, port->gmac_base + GMAC_CONFIG0); <------>spin_unlock_irqrestore(&port->config_lock, flags); } static void gmac_enable_tx_rx(struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>unsigned long flags; <------>u32 reg; <------>spin_lock_irqsave(&port->config_lock, flags); <------>reg = readl(port->gmac_base + GMAC_CONFIG0); <------>reg &= ~CONFIG0_TX_RX_DISABLE; <------>writel(reg, port->gmac_base + GMAC_CONFIG0); <------>spin_unlock_irqrestore(&port->config_lock, flags); } static void gmac_disable_tx_rx(struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>unsigned long flags; <------>u32 val; <------>spin_lock_irqsave(&port->config_lock, flags); <------>val = readl(port->gmac_base + GMAC_CONFIG0); <------>val |= CONFIG0_TX_RX_DISABLE; <------>writel(val, port->gmac_base + GMAC_CONFIG0); <------>spin_unlock_irqrestore(&port->config_lock, flags); <------>mdelay(10); /* let GMAC consume packet */ } static void gmac_set_flow_control(struct net_device *netdev, bool tx, bool rx) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>unsigned long flags; <------>u32 val; <------>spin_lock_irqsave(&port->config_lock, flags); <------>val = readl(port->gmac_base + GMAC_CONFIG0); <------>val &= ~CONFIG0_FLOW_CTL; <------>if (tx) <------><------>val |= CONFIG0_FLOW_TX; <------>if (rx) <------><------>val |= CONFIG0_FLOW_RX; <------>writel(val, port->gmac_base + GMAC_CONFIG0); <------>spin_unlock_irqrestore(&port->config_lock, flags); } static void gmac_speed_set(struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>struct phy_device *phydev = netdev->phydev; <------>union gmac_status status, old_status; <------>int pause_tx = 0; <------>int pause_rx = 0; <------>status.bits32 = readl(port->gmac_base + GMAC_STATUS); <------>old_status.bits32 = status.bits32; <------>status.bits.link = phydev->link; <------>status.bits.duplex = phydev->duplex; <------>switch (phydev->speed) { <------>case 1000: <------><------>status.bits.speed = GMAC_SPEED_1000; <------><------>if (phy_interface_mode_is_rgmii(phydev->interface)) <------><------><------>status.bits.mii_rmii = GMAC_PHY_RGMII_1000; <------><------>netdev_dbg(netdev, "connect %s to RGMII @ 1Gbit\n", <------><------><------> phydev_name(phydev)); <------><------>break; <------>case 100: <------><------>status.bits.speed = GMAC_SPEED_100; <------><------>if (phy_interface_mode_is_rgmii(phydev->interface)) <------><------><------>status.bits.mii_rmii = GMAC_PHY_RGMII_100_10; <------><------>netdev_dbg(netdev, "connect %s to RGMII @ 100 Mbit\n", <------><------><------> phydev_name(phydev)); <------><------>break; <------>case 10: <------><------>status.bits.speed = GMAC_SPEED_10; <------><------>if (phy_interface_mode_is_rgmii(phydev->interface)) <------><------><------>status.bits.mii_rmii = GMAC_PHY_RGMII_100_10; <------><------>netdev_dbg(netdev, "connect %s to RGMII @ 10 Mbit\n", <------><------><------> phydev_name(phydev)); <------><------>break; <------>default: <------><------>netdev_warn(netdev, "Unsupported PHY speed (%d) on %s\n", <------><------><------> phydev->speed, phydev_name(phydev)); <------>} <------>if (phydev->duplex == DUPLEX_FULL) { <------><------>u16 lcladv = phy_read(phydev, MII_ADVERTISE); <------><------>u16 rmtadv = phy_read(phydev, MII_LPA); <------><------>u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv); <------><------>if (cap & FLOW_CTRL_RX) <------><------><------>pause_rx = 1; <------><------>if (cap & FLOW_CTRL_TX) <------><------><------>pause_tx = 1; <------>} <------>gmac_set_flow_control(netdev, pause_tx, pause_rx); <------>if (old_status.bits32 == status.bits32) <------><------>return; <------>if (netif_msg_link(port)) { <------><------>phy_print_status(phydev); <------><------>netdev_info(netdev, "link flow control: %s\n", <------><------><------> phydev->pause <------><------><------> ? (phydev->asym_pause ? "tx" : "both") <------><------><------> : (phydev->asym_pause ? "rx" : "none") <------><------>); <------>} <------>gmac_disable_tx_rx(netdev); <------>writel(status.bits32, port->gmac_base + GMAC_STATUS); <------>gmac_enable_tx_rx(netdev); } static int gmac_setup_phy(struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>union gmac_status status = { .bits32 = 0 }; <------>struct device *dev = port->dev; <------>struct phy_device *phy; <------>phy = of_phy_get_and_connect(netdev, <------><------><------><------> dev->of_node, <------><------><------><------> gmac_speed_set); <------>if (!phy) <------><------>return -ENODEV; <------>netdev->phydev = phy; <------>phy_set_max_speed(phy, SPEED_1000); <------>phy_support_asym_pause(phy); <------>/* set PHY interface type */ <------>switch (phy->interface) { <------>case PHY_INTERFACE_MODE_MII: <------><------>netdev_dbg(netdev, <------><------><------> "MII: set GMAC0 to GMII mode, GMAC1 disabled\n"); <------><------>status.bits.mii_rmii = GMAC_PHY_MII; <------><------>break; <------>case PHY_INTERFACE_MODE_GMII: <------><------>netdev_dbg(netdev, <------><------><------> "GMII: set GMAC0 to GMII mode, GMAC1 disabled\n"); <------><------>status.bits.mii_rmii = GMAC_PHY_GMII; <------><------>break; <------>case PHY_INTERFACE_MODE_RGMII: <------>case PHY_INTERFACE_MODE_RGMII_ID: <------>case PHY_INTERFACE_MODE_RGMII_TXID: <------>case PHY_INTERFACE_MODE_RGMII_RXID: <------><------>netdev_dbg(netdev, <------><------><------> "RGMII: set GMAC0 and GMAC1 to MII/RGMII mode\n"); <------><------>status.bits.mii_rmii = GMAC_PHY_RGMII_100_10; <------><------>break; <------>default: <------><------>netdev_err(netdev, "Unsupported MII interface\n"); <------><------>phy_disconnect(phy); <------><------>netdev->phydev = NULL; <------><------>return -EINVAL; <------>} <------>writel(status.bits32, port->gmac_base + GMAC_STATUS); <------>if (netif_msg_link(port)) <------><------>phy_attached_info(phy); <------>return 0; } /* 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 { <------>unsigned int max_l3_len; <------>u8 val; }; static const struct gmac_max_framelen gmac_maxlens[] = { <------>{ <------><------>.max_l3_len = 1518, <------><------>.val = CONFIG0_MAXLEN_1518, <------>}, <------>{ <------><------>.max_l3_len = 1522, <------><------>.val = CONFIG0_MAXLEN_1522, <------>}, <------>{ <------><------>.max_l3_len = 1536, <------><------>.val = CONFIG0_MAXLEN_1536, <------>}, <------>{ <------><------>.max_l3_len = 1542, <------><------>.val = CONFIG0_MAXLEN_1542, <------>}, <------>{ <------><------>.max_l3_len = 9212, <------><------>.val = CONFIG0_MAXLEN_9k, <------>}, <------>{ <------><------>.max_l3_len = 10236, <------><------>.val = CONFIG0_MAXLEN_10k, <------>}, }; static int gmac_pick_rx_max_len(unsigned int max_l3_len) { <------>const struct gmac_max_framelen *maxlen; <------>int maxtot; <------>int i; <------>maxtot = max_l3_len + ETH_HLEN + VLAN_HLEN; <------>for (i = 0; i < ARRAY_SIZE(gmac_maxlens); i++) { <------><------>maxlen = &gmac_maxlens[i]; <------><------>if (maxtot <= maxlen->max_l3_len) <------><------><------>return maxlen->val; <------>} <------>return -1; } static int gmac_init(struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>union gmac_config0 config0 = { .bits = { <------><------>.dis_tx = 1, <------><------>.dis_rx = 1, <------><------>.ipv4_rx_chksum = 1, <------><------>.ipv6_rx_chksum = 1, <------><------>.rx_err_detect = 1, <------><------>.rgmm_edge = 1, <------><------>.port0_chk_hwq = 1, <------><------>.port1_chk_hwq = 1, <------><------>.port0_chk_toeq = 1, <------><------>.port1_chk_toeq = 1, <------><------>.port0_chk_classq = 1, <------><------>.port1_chk_classq = 1, <------>} }; <------>union gmac_ahb_weight ahb_weight = { .bits = { <------><------>.rx_weight = 1, <------><------>.tx_weight = 1, <------><------>.hash_weight = 1, <------><------>.pre_req = 0x1f, <------><------>.tq_dv_threshold = 0, <------>} }; <------>union gmac_tx_wcr0 hw_weigh = { .bits = { <------><------>.hw_tq3 = 1, <------><------>.hw_tq2 = 1, <------><------>.hw_tq1 = 1, <------><------>.hw_tq0 = 1, <------>} }; <------>union gmac_tx_wcr1 sw_weigh = { .bits = { <------><------>.sw_tq5 = 1, <------><------>.sw_tq4 = 1, <------><------>.sw_tq3 = 1, <------><------>.sw_tq2 = 1, <------><------>.sw_tq1 = 1, <------><------>.sw_tq0 = 1, <------>} }; <------>union gmac_config1 config1 = { .bits = { <------><------>.set_threshold = 16, <------><------>.rel_threshold = 24, <------>} }; <------>union gmac_config2 config2 = { .bits = { <------><------>.set_threshold = 16, <------><------>.rel_threshold = 32, <------>} }; <------>union gmac_config3 config3 = { .bits = { <------><------>.set_threshold = 0, <------><------>.rel_threshold = 0, <------>} }; <------>union gmac_config0 tmp; <------>config0.bits.max_len = gmac_pick_rx_max_len(netdev->mtu); <------>tmp.bits32 = readl(port->gmac_base + GMAC_CONFIG0); <------>config0.bits.reserved = tmp.bits.reserved; <------>writel(config0.bits32, port->gmac_base + GMAC_CONFIG0); <------>writel(config1.bits32, port->gmac_base + GMAC_CONFIG1); <------>writel(config2.bits32, port->gmac_base + GMAC_CONFIG2); <------>writel(config3.bits32, port->gmac_base + GMAC_CONFIG3); <------>readl(port->dma_base + GMAC_AHB_WEIGHT_REG); <------>writel(ahb_weight.bits32, port->dma_base + GMAC_AHB_WEIGHT_REG); <------>writel(hw_weigh.bits32, <------> port->dma_base + GMAC_TX_WEIGHTING_CTRL_0_REG); <------>writel(sw_weigh.bits32, <------> port->dma_base + GMAC_TX_WEIGHTING_CTRL_1_REG); <------>port->rxq_order = DEFAULT_GMAC_RXQ_ORDER; <------>port->txq_order = DEFAULT_GMAC_TXQ_ORDER; <------>port->rx_coalesce_nsecs = DEFAULT_RX_COALESCE_NSECS; <------>/* Mark every quarter of the queue a packet for interrupt <------> * in order to be able to wake up the queue if it was stopped <------> */ <------>port->irq_every_tx_packets = 1 << (port->txq_order - 2); <------>return 0; } static int gmac_setup_txqs(struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>unsigned int n_txq = netdev->num_tx_queues; <------>struct gemini_ethernet *geth = port->geth; <------>size_t entries = 1 << port->txq_order; <------>struct gmac_txq *txq = port->txq; <------>struct gmac_txdesc *desc_ring; <------>size_t len = n_txq * entries; <------>struct sk_buff **skb_tab; <------>void __iomem *rwptr_reg; <------>unsigned int r; <------>int i; <------>rwptr_reg = port->dma_base + GMAC_SW_TX_QUEUE0_PTR_REG; <------>skb_tab = kcalloc(len, sizeof(*skb_tab), GFP_KERNEL); <------>if (!skb_tab) <------><------>return -ENOMEM; <------>desc_ring = dma_alloc_coherent(geth->dev, len * sizeof(*desc_ring), <------><------><------><------> &port->txq_dma_base, GFP_KERNEL); <------>if (!desc_ring) { <------><------>kfree(skb_tab); <------><------>return -ENOMEM; <------>} <------>if (port->txq_dma_base & ~DMA_Q_BASE_MASK) { <------><------>dev_warn(geth->dev, "TX queue base is not aligned\n"); <------><------>dma_free_coherent(geth->dev, len * sizeof(*desc_ring), <------><------><------><------> desc_ring, port->txq_dma_base); <------><------>kfree(skb_tab); <------><------>return -ENOMEM; <------>} <------>writel(port->txq_dma_base | port->txq_order, <------> port->dma_base + GMAC_SW_TX_QUEUE_BASE_REG); <------>for (i = 0; i < n_txq; i++) { <------><------>txq->ring = desc_ring; <------><------>txq->skb = skb_tab; <------><------>txq->noirq_packets = 0; <------><------>r = readw(rwptr_reg); <------><------>rwptr_reg += 2; <------><------>writew(r, rwptr_reg); <------><------>rwptr_reg += 2; <------><------>txq->cptr = r; <------><------>txq++; <------><------>desc_ring += entries; <------><------>skb_tab += entries; <------>} <------>return 0; } static void gmac_clean_txq(struct net_device *netdev, struct gmac_txq *txq, <------><------><------> unsigned int r) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>unsigned int m = (1 << port->txq_order) - 1; <------>struct gemini_ethernet *geth = port->geth; <------>unsigned int c = txq->cptr; <------>union gmac_txdesc_0 word0; <------>union gmac_txdesc_1 word1; <------>unsigned int hwchksum = 0; <------>unsigned long bytes = 0; <------>struct gmac_txdesc *txd; <------>unsigned short nfrags; <------>unsigned int errs = 0; <------>unsigned int pkts = 0; <------>unsigned int word3; <------>dma_addr_t mapping; <------>if (c == r) <------><------>return; <------>while (c != r) { <------><------>txd = txq->ring + c; <------><------>word0 = txd->word0; <------><------>word1 = txd->word1; <------><------>mapping = txd->word2.buf_adr; <------><------>word3 = txd->word3.bits32; <------><------>dma_unmap_single(geth->dev, mapping, <------><------><------><------> word0.bits.buffer_size, DMA_TO_DEVICE); <------><------>if (word3 & EOF_BIT) <------><------><------>dev_kfree_skb(txq->skb[c]); <------><------>c++; <------><------>c &= m; <------><------>if (!(word3 & SOF_BIT)) <------><------><------>continue; <------><------>if (!word0.bits.status_tx_ok) { <------><------><------>errs++; <------><------><------>continue; <------><------>} <------><------>pkts++; <------><------>bytes += txd->word1.bits.byte_count; <------><------>if (word1.bits32 & TSS_CHECKUM_ENABLE) <------><------><------>hwchksum++; <------><------>nfrags = word0.bits.desc_count - 1; <------><------>if (nfrags) { <------><------><------>if (nfrags >= TX_MAX_FRAGS) <------><------><------><------>nfrags = TX_MAX_FRAGS - 1; <------><------><------>u64_stats_update_begin(&port->tx_stats_syncp); <------><------><------>port->tx_frag_stats[nfrags]++; <------><------><------>u64_stats_update_end(&port->tx_stats_syncp); <------><------>} <------>} <------>u64_stats_update_begin(&port->ir_stats_syncp); <------>port->stats.tx_errors += errs; <------>port->stats.tx_packets += pkts; <------>port->stats.tx_bytes += bytes; <------>port->tx_hw_csummed += hwchksum; <------>u64_stats_update_end(&port->ir_stats_syncp); <------>txq->cptr = c; } static void gmac_cleanup_txqs(struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>unsigned int n_txq = netdev->num_tx_queues; <------>struct gemini_ethernet *geth = port->geth; <------>void __iomem *rwptr_reg; <------>unsigned int r, i; <------>rwptr_reg = port->dma_base + GMAC_SW_TX_QUEUE0_PTR_REG; <------>for (i = 0; i < n_txq; i++) { <------><------>r = readw(rwptr_reg); <------><------>rwptr_reg += 2; <------><------>writew(r, rwptr_reg); <------><------>rwptr_reg += 2; <------><------>gmac_clean_txq(netdev, port->txq + i, r); <------>} <------>writel(0, port->dma_base + GMAC_SW_TX_QUEUE_BASE_REG); <------>kfree(port->txq->skb); <------>dma_free_coherent(geth->dev, <------><------><------> n_txq * sizeof(*port->txq->ring) << port->txq_order, <------><------><------> port->txq->ring, port->txq_dma_base); } static int gmac_setup_rxq(struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>struct gemini_ethernet *geth = port->geth; <------>struct nontoe_qhdr __iomem *qhdr; <------>qhdr = geth->base + TOE_DEFAULT_Q_HDR_BASE(netdev->dev_id); <------>port->rxq_rwptr = &qhdr->word1; <------>/* Remap a slew of memory to use for the RX queue */ <------>port->rxq_ring = dma_alloc_coherent(geth->dev, <------><------><------><------>sizeof(*port->rxq_ring) << port->rxq_order, <------><------><------><------>&port->rxq_dma_base, GFP_KERNEL); <------>if (!port->rxq_ring) <------><------>return -ENOMEM; <------>if (port->rxq_dma_base & ~NONTOE_QHDR0_BASE_MASK) { <------><------>dev_warn(geth->dev, "RX queue base is not aligned\n"); <------><------>return -ENOMEM; <------>} <------>writel(port->rxq_dma_base | port->rxq_order, &qhdr->word0); <------>writel(0, port->rxq_rwptr); <------>return 0; } static struct gmac_queue_page * gmac_get_queue_page(struct gemini_ethernet *geth, <------><------> struct gemini_ethernet_port *port, <------><------> dma_addr_t addr) { <------>struct gmac_queue_page *gpage; <------>dma_addr_t mapping; <------>int i; <------>/* Only look for even pages */ <------>mapping = addr & PAGE_MASK; <------>if (!geth->freeq_pages) { <------><------>dev_err(geth->dev, "try to get page with no page list\n"); <------><------>return NULL; <------>} <------>/* Look up a ring buffer page from virtual mapping */ <------>for (i = 0; i < geth->num_freeq_pages; i++) { <------><------>gpage = &geth->freeq_pages[i]; <------><------>if (gpage->mapping == mapping) <------><------><------>return gpage; <------>} <------>return NULL; } static void gmac_cleanup_rxq(struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>struct gemini_ethernet *geth = port->geth; <------>struct gmac_rxdesc *rxd = port->rxq_ring; <------>static struct gmac_queue_page *gpage; <------>struct nontoe_qhdr __iomem *qhdr; <------>void __iomem *dma_reg; <------>void __iomem *ptr_reg; <------>dma_addr_t mapping; <------>union dma_rwptr rw; <------>unsigned int r, w; <------>qhdr = geth->base + <------><------>TOE_DEFAULT_Q_HDR_BASE(netdev->dev_id); <------>dma_reg = &qhdr->word0; <------>ptr_reg = &qhdr->word1; <------>rw.bits32 = readl(ptr_reg); <------>r = rw.bits.rptr; <------>w = rw.bits.wptr; <------>writew(r, ptr_reg + 2); <------>writel(0, dma_reg); <------>/* Loop from read pointer to write pointer of the RX queue <------> * and free up all pages by the queue. <------> */ <------>while (r != w) { <------><------>mapping = rxd[r].word2.buf_adr; <------><------>r++; <------><------>r &= ((1 << port->rxq_order) - 1); <------><------>if (!mapping) <------><------><------>continue; <------><------>/* Freeq pointers are one page off */ <------><------>gpage = gmac_get_queue_page(geth, port, mapping + PAGE_SIZE); <------><------>if (!gpage) { <------><------><------>dev_err(geth->dev, "could not find page\n"); <------><------><------>continue; <------><------>} <------><------>/* Release the RX queue reference to the page */ <------><------>put_page(gpage->page); <------>} <------>dma_free_coherent(geth->dev, sizeof(*port->rxq_ring) << port->rxq_order, <------><------><------> port->rxq_ring, port->rxq_dma_base); } static struct page *geth_freeq_alloc_map_page(struct gemini_ethernet *geth, <------><------><------><------><------> int pn) { <------>struct gmac_rxdesc *freeq_entry; <------>struct gmac_queue_page *gpage; <------>unsigned int fpp_order; <------>unsigned int frag_len; <------>dma_addr_t mapping; <------>struct page *page; <------>int i; <------>/* First allocate and DMA map a single page */ <------>page = alloc_page(GFP_ATOMIC); <------>if (!page) <------><------>return NULL; <------>mapping = dma_map_single(geth->dev, page_address(page), <------><------><------><------> PAGE_SIZE, DMA_FROM_DEVICE); <------>if (dma_mapping_error(geth->dev, mapping)) { <------><------>put_page(page); <------><------>return NULL; <------>} <------>/* The assign the page mapping (physical address) to the buffer address <------> * in the hardware queue. PAGE_SHIFT on ARM is 12 (1 page is 4096 bytes, <------> * 4k), and the default RX frag order is 11 (fragments are up 20 2048 <------> * bytes, 2k) so fpp_order (fragments per page order) is default 1. Thus <------> * each page normally needs two entries in the queue. <------> */ <------>frag_len = 1 << geth->freeq_frag_order; /* Usually 2048 */ <------>fpp_order = PAGE_SHIFT - geth->freeq_frag_order; <------>freeq_entry = geth->freeq_ring + (pn << fpp_order); <------>dev_dbg(geth->dev, "allocate page %d fragment length %d fragments per page %d, freeq entry %p\n", <------><------> pn, frag_len, (1 << fpp_order), freeq_entry); <------>for (i = (1 << fpp_order); i > 0; i--) { <------><------>freeq_entry->word2.buf_adr = mapping; <------><------>freeq_entry++; <------><------>mapping += frag_len; <------>} <------>/* If the freeq entry already has a page mapped, then unmap it. */ <------>gpage = &geth->freeq_pages[pn]; <------>if (gpage->page) { <------><------>mapping = geth->freeq_ring[pn << fpp_order].word2.buf_adr; <------><------>dma_unmap_single(geth->dev, mapping, frag_len, DMA_FROM_DEVICE); <------><------>/* This should be the last reference to the page so it gets <------><------> * released <------><------> */ <------><------>put_page(gpage->page); <------>} <------>/* Then put our new mapping into the page table */ <------>dev_dbg(geth->dev, "page %d, DMA addr: %08x, page %p\n", <------><------>pn, (unsigned int)mapping, page); <------>gpage->mapping = mapping; <------>gpage->page = page; <------>return page; } /** * 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) { <------>unsigned int fpp_order = PAGE_SHIFT - geth->freeq_frag_order; <------>unsigned int count = 0; <------>unsigned int pn, epn; <------>unsigned long flags; <------>union dma_rwptr rw; <------>unsigned int m_pn; <------>/* Mask for page */ <------>m_pn = (1 << (geth->freeq_order - fpp_order)) - 1; <------>spin_lock_irqsave(&geth->freeq_lock, flags); <------>rw.bits32 = readl(geth->base + GLOBAL_SWFQ_RWPTR_REG); <------>pn = (refill ? rw.bits.wptr : rw.bits.rptr) >> fpp_order; <------>epn = (rw.bits.rptr >> fpp_order) - 1; <------>epn &= m_pn; <------>/* Loop over the freeq ring buffer entries */ <------>while (pn != epn) { <------><------>struct gmac_queue_page *gpage; <------><------>struct page *page; <------><------>gpage = &geth->freeq_pages[pn]; <------><------>page = gpage->page; <------><------>dev_dbg(geth->dev, "fill entry %d page ref count %d add %d refs\n", <------><------><------>pn, page_ref_count(page), 1 << fpp_order); <------><------>if (page_ref_count(page) > 1) { <------><------><------>unsigned int fl = (pn - epn) & m_pn; <------><------><------>if (fl > 64 >> fpp_order) <------><------><------><------>break; <------><------><------>page = geth_freeq_alloc_map_page(geth, pn); <------><------><------>if (!page) <------><------><------><------>break; <------><------>} <------><------>/* Add one reference per fragment in the page */ <------><------>page_ref_add(page, 1 << fpp_order); <------><------>count += 1 << fpp_order; <------><------>pn++; <------><------>pn &= m_pn; <------>} <------>writew(pn << fpp_order, geth->base + GLOBAL_SWFQ_RWPTR_REG + 2); <------>spin_unlock_irqrestore(&geth->freeq_lock, flags); <------>return count; } static int geth_setup_freeq(struct gemini_ethernet *geth) { <------>unsigned int fpp_order = PAGE_SHIFT - geth->freeq_frag_order; <------>unsigned int frag_len = 1 << geth->freeq_frag_order; <------>unsigned int len = 1 << geth->freeq_order; <------>unsigned int pages = len >> fpp_order; <------>union queue_threshold qt; <------>union dma_skb_size skbsz; <------>unsigned int filled; <------>unsigned int pn; <------>geth->freeq_ring = dma_alloc_coherent(geth->dev, <------><------>sizeof(*geth->freeq_ring) << geth->freeq_order, <------><------>&geth->freeq_dma_base, GFP_KERNEL); <------>if (!geth->freeq_ring) <------><------>return -ENOMEM; <------>if (geth->freeq_dma_base & ~DMA_Q_BASE_MASK) { <------><------>dev_warn(geth->dev, "queue ring base is not aligned\n"); <------><------>goto err_freeq; <------>} <------>/* Allocate a mapping to page look-up index */ <------>geth->freeq_pages = kcalloc(pages, sizeof(*geth->freeq_pages), <------><------><------><------> GFP_KERNEL); <------>if (!geth->freeq_pages) <------><------>goto err_freeq; <------>geth->num_freeq_pages = pages; <------>dev_info(geth->dev, "allocate %d pages for queue\n", pages); <------>for (pn = 0; pn < pages; pn++) <------><------>if (!geth_freeq_alloc_map_page(geth, pn)) <------><------><------>goto err_freeq_alloc; <------>filled = geth_fill_freeq(geth, false); <------>if (!filled) <------><------>goto err_freeq_alloc; <------>qt.bits32 = readl(geth->base + GLOBAL_QUEUE_THRESHOLD_REG); <------>qt.bits.swfq_empty = 32; <------>writel(qt.bits32, geth->base + GLOBAL_QUEUE_THRESHOLD_REG); <------>skbsz.bits.sw_skb_size = 1 << geth->freeq_frag_order; <------>writel(skbsz.bits32, geth->base + GLOBAL_DMA_SKB_SIZE_REG); <------>writel(geth->freeq_dma_base | geth->freeq_order, <------> geth->base + GLOBAL_SW_FREEQ_BASE_SIZE_REG); <------>return 0; err_freeq_alloc: <------>while (pn > 0) { <------><------>struct gmac_queue_page *gpage; <------><------>dma_addr_t mapping; <------><------>--pn; <------><------>mapping = geth->freeq_ring[pn << fpp_order].word2.buf_adr; <------><------>dma_unmap_single(geth->dev, mapping, frag_len, DMA_FROM_DEVICE); <------><------>gpage = &geth->freeq_pages[pn]; <------><------>put_page(gpage->page); <------>} <------>kfree(geth->freeq_pages); err_freeq: <------>dma_free_coherent(geth->dev, <------><------><------> sizeof(*geth->freeq_ring) << geth->freeq_order, <------><------><------> geth->freeq_ring, geth->freeq_dma_base); <------>geth->freeq_ring = NULL; <------>return -ENOMEM; } /** * 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) { <------>unsigned int fpp_order = PAGE_SHIFT - geth->freeq_frag_order; <------>unsigned int frag_len = 1 << geth->freeq_frag_order; <------>unsigned int len = 1 << geth->freeq_order; <------>unsigned int pages = len >> fpp_order; <------>unsigned int pn; <------>writew(readw(geth->base + GLOBAL_SWFQ_RWPTR_REG), <------> geth->base + GLOBAL_SWFQ_RWPTR_REG + 2); <------>writel(0, geth->base + GLOBAL_SW_FREEQ_BASE_SIZE_REG); <------>for (pn = 0; pn < pages; pn++) { <------><------>struct gmac_queue_page *gpage; <------><------>dma_addr_t mapping; <------><------>mapping = geth->freeq_ring[pn << fpp_order].word2.buf_adr; <------><------>dma_unmap_single(geth->dev, mapping, frag_len, DMA_FROM_DEVICE); <------><------>gpage = &geth->freeq_pages[pn]; <------><------>while (page_ref_count(gpage->page) > 0) <------><------><------>put_page(gpage->page); <------>} <------>kfree(geth->freeq_pages); <------>dma_free_coherent(geth->dev, <------><------><------> sizeof(*geth->freeq_ring) << geth->freeq_order, <------><------><------> geth->freeq_ring, geth->freeq_dma_base); } /** * 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) { <------>struct gemini_ethernet *geth = port->geth; <------>struct net_device *netdev = port->netdev; <------>struct gemini_ethernet_port *other_port; <------>struct net_device *other_netdev; <------>unsigned int new_size = 0; <------>unsigned int new_order; <------>unsigned long flags; <------>u32 en; <------>int ret; <------>if (netdev->dev_id == 0) <------><------>other_netdev = geth->port1->netdev; <------>else <------><------>other_netdev = geth->port0->netdev; <------>if (other_netdev && netif_running(other_netdev)) <------><------>return -EBUSY; <------>new_size = 1 << (port->rxq_order + 1); <------>netdev_dbg(netdev, "port %d size: %d order %d\n", <------><------> netdev->dev_id, <------><------> new_size, <------><------> port->rxq_order); <------>if (other_netdev) { <------><------>other_port = netdev_priv(other_netdev); <------><------>new_size += 1 << (other_port->rxq_order + 1); <------><------>netdev_dbg(other_netdev, "port %d size: %d order %d\n", <------><------><------> other_netdev->dev_id, <------><------><------> (1 << (other_port->rxq_order + 1)), <------><------><------> other_port->rxq_order); <------>} <------>new_order = min(15, ilog2(new_size - 1) + 1); <------>dev_dbg(geth->dev, "set shared queue to size %d order %d\n", <------><------>new_size, new_order); <------>if (geth->freeq_order == new_order) <------><------>return 0; <------>spin_lock_irqsave(&geth->irq_lock, flags); <------>/* Disable the software queue IRQs */ <------>en = readl(geth->base + GLOBAL_INTERRUPT_ENABLE_4_REG); <------>en &= ~SWFQ_EMPTY_INT_BIT; <------>writel(en, geth->base + GLOBAL_INTERRUPT_ENABLE_4_REG); <------>spin_unlock_irqrestore(&geth->irq_lock, flags); <------>/* Drop the old queue */ <------>if (geth->freeq_ring) <------><------>geth_cleanup_freeq(geth); <------>/* Allocate a new queue with the desired order */ <------>geth->freeq_order = new_order; <------>ret = geth_setup_freeq(geth); <------>/* Restart the interrupts - NOTE if this is the first resize <------> * after probe(), this is where the interrupts get turned on <------> * in the first place. <------> */ <------>spin_lock_irqsave(&geth->irq_lock, flags); <------>en |= SWFQ_EMPTY_INT_BIT; <------>writel(en, geth->base + GLOBAL_INTERRUPT_ENABLE_4_REG); <------>spin_unlock_irqrestore(&geth->irq_lock, flags); <------>return ret; } static void gmac_tx_irq_enable(struct net_device *netdev, <------><------><------> unsigned int txq, int en) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>struct gemini_ethernet *geth = port->geth; <------>u32 val, mask; <------>netdev_dbg(netdev, "%s device %d\n", __func__, netdev->dev_id); <------>mask = GMAC0_IRQ0_TXQ0_INTS << (6 * netdev->dev_id + txq); <------>if (en) <------><------>writel(mask, geth->base + GLOBAL_INTERRUPT_STATUS_0_REG); <------>val = readl(geth->base + GLOBAL_INTERRUPT_ENABLE_0_REG); <------>val = en ? val | mask : val & ~mask; <------>writel(val, geth->base + GLOBAL_INTERRUPT_ENABLE_0_REG); } static void gmac_tx_irq(struct net_device *netdev, unsigned int txq_num) { <------>struct netdev_queue *ntxq = netdev_get_tx_queue(netdev, txq_num); <------>gmac_tx_irq_enable(netdev, txq_num, 0); <------>netif_tx_wake_queue(ntxq); } static int gmac_map_tx_bufs(struct net_device *netdev, struct sk_buff *skb, <------><------><------> struct gmac_txq *txq, unsigned short *desc) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>struct skb_shared_info *skb_si = skb_shinfo(skb); <------>unsigned short m = (1 << port->txq_order) - 1; <------>short frag, last_frag = skb_si->nr_frags - 1; <------>struct gemini_ethernet *geth = port->geth; <------>unsigned int word1, word3, buflen; <------>unsigned short w = *desc; <------>struct gmac_txdesc *txd; <------>skb_frag_t *skb_frag; <------>dma_addr_t mapping; <------>unsigned short mtu; <------>void *buffer; <------>mtu = ETH_HLEN; <------>mtu += netdev->mtu; <------>if (skb->protocol == htons(ETH_P_8021Q)) <------><------>mtu += VLAN_HLEN; <------>word1 = skb->len; <------>word3 = SOF_BIT; <------>if (word1 > mtu) { <------><------>word1 |= TSS_MTU_ENABLE_BIT; <------><------>word3 |= mtu; <------>} <------>if (skb->ip_summed != CHECKSUM_NONE) { <------><------>int tcp = 0; <------><------>if (skb->protocol == htons(ETH_P_IP)) { <------><------><------>word1 |= TSS_IP_CHKSUM_BIT; <------><------><------>tcp = ip_hdr(skb)->protocol == IPPROTO_TCP; <------><------>} else { /* IPv6 */ <------><------><------>word1 |= TSS_IPV6_ENABLE_BIT; <------><------><------>tcp = ipv6_hdr(skb)->nexthdr == IPPROTO_TCP; <------><------>} <------><------>word1 |= tcp ? TSS_TCP_CHKSUM_BIT : TSS_UDP_CHKSUM_BIT; <------>} <------>frag = -1; <------>while (frag <= last_frag) { <------><------>if (frag == -1) { <------><------><------>buffer = skb->data; <------><------><------>buflen = skb_headlen(skb); <------><------>} else { <------><------><------>skb_frag = skb_si->frags + frag; <------><------><------>buffer = skb_frag_address(skb_frag); <------><------><------>buflen = skb_frag_size(skb_frag); <------><------>} <------><------>if (frag == last_frag) { <------><------><------>word3 |= EOF_BIT; <------><------><------>txq->skb[w] = skb; <------><------>} <------><------>mapping = dma_map_single(geth->dev, buffer, buflen, <------><------><------><------><------> DMA_TO_DEVICE); <------><------>if (dma_mapping_error(geth->dev, mapping)) <------><------><------>goto map_error; <------><------>txd = txq->ring + w; <------><------>txd->word0.bits32 = buflen; <------><------>txd->word1.bits32 = word1; <------><------>txd->word2.buf_adr = mapping; <------><------>txd->word3.bits32 = word3; <------><------>word3 &= MTU_SIZE_BIT_MASK; <------><------>w++; <------><------>w &= m; <------><------>frag++; <------>} <------>*desc = w; <------>return 0; map_error: <------>while (w != *desc) { <------><------>w--; <------><------>w &= m; <------><------>dma_unmap_page(geth->dev, txq->ring[w].word2.buf_adr, <------><------><------> txq->ring[w].word0.bits.buffer_size, <------><------><------> DMA_TO_DEVICE); <------>} <------>return -ENOMEM; } static netdev_tx_t gmac_start_xmit(struct sk_buff *skb, <------><------><------><------> struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>unsigned short m = (1 << port->txq_order) - 1; <------>struct netdev_queue *ntxq; <------>unsigned short r, w, d; <------>void __iomem *ptr_reg; <------>struct gmac_txq *txq; <------>int txq_num, nfrags; <------>union dma_rwptr rw; <------>if (skb->len >= 0x10000) <------><------>goto out_drop_free; <------>txq_num = skb_get_queue_mapping(skb); <------>ptr_reg = port->dma_base + GMAC_SW_TX_QUEUE_PTR_REG(txq_num); <------>txq = &port->txq[txq_num]; <------>ntxq = netdev_get_tx_queue(netdev, txq_num); <------>nfrags = skb_shinfo(skb)->nr_frags; <------>rw.bits32 = readl(ptr_reg); <------>r = rw.bits.rptr; <------>w = rw.bits.wptr; <------>d = txq->cptr - w - 1; <------>d &= m; <------>if (d < nfrags + 2) { <------><------>gmac_clean_txq(netdev, txq, r); <------><------>d = txq->cptr - w - 1; <------><------>d &= m; <------><------>if (d < nfrags + 2) { <------><------><------>netif_tx_stop_queue(ntxq); <------><------><------>d = txq->cptr + nfrags + 16; <------><------><------>d &= m; <------><------><------>txq->ring[d].word3.bits.eofie = 1; <------><------><------>gmac_tx_irq_enable(netdev, txq_num, 1); <------><------><------>u64_stats_update_begin(&port->tx_stats_syncp); <------><------><------>netdev->stats.tx_fifo_errors++; <------><------><------>u64_stats_update_end(&port->tx_stats_syncp); <------><------><------>return NETDEV_TX_BUSY; <------><------>} <------>} <------>if (gmac_map_tx_bufs(netdev, skb, txq, &w)) { <------><------>if (skb_linearize(skb)) <------><------><------>goto out_drop; <------><------>u64_stats_update_begin(&port->tx_stats_syncp); <------><------>port->tx_frags_linearized++; <------><------>u64_stats_update_end(&port->tx_stats_syncp); <------><------>if (gmac_map_tx_bufs(netdev, skb, txq, &w)) <------><------><------>goto out_drop_free; <------>} <------>writew(w, ptr_reg + 2); <------>gmac_clean_txq(netdev, txq, r); <------>return NETDEV_TX_OK; out_drop_free: <------>dev_kfree_skb(skb); out_drop: <------>u64_stats_update_begin(&port->tx_stats_syncp); <------>port->stats.tx_dropped++; <------>u64_stats_update_end(&port->tx_stats_syncp); <------>return NETDEV_TX_OK; } static void gmac_tx_timeout(struct net_device *netdev, unsigned int txqueue) { <------>netdev_err(netdev, "Tx timeout\n"); <------>gmac_dump_dma_state(netdev); } static void gmac_enable_irq(struct net_device *netdev, int enable) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>struct gemini_ethernet *geth = port->geth; <------>unsigned long flags; <------>u32 val, mask; <------>netdev_dbg(netdev, "%s device %d %s\n", __func__, <------><------> netdev->dev_id, enable ? "enable" : "disable"); <------>spin_lock_irqsave(&geth->irq_lock, flags); <------>mask = GMAC0_IRQ0_2 << (netdev->dev_id * 2); <------>val = readl(geth->base + GLOBAL_INTERRUPT_ENABLE_0_REG); <------>val = enable ? (val | mask) : (val & ~mask); <------>writel(val, geth->base + GLOBAL_INTERRUPT_ENABLE_0_REG); <------>mask = DEFAULT_Q0_INT_BIT << netdev->dev_id; <------>val = readl(geth->base + GLOBAL_INTERRUPT_ENABLE_1_REG); <------>val = enable ? (val | mask) : (val & ~mask); <------>writel(val, geth->base + GLOBAL_INTERRUPT_ENABLE_1_REG); <------>mask = GMAC0_IRQ4_8 << (netdev->dev_id * 8); <------>val = readl(geth->base + GLOBAL_INTERRUPT_ENABLE_4_REG); <------>val = enable ? (val | mask) : (val & ~mask); <------>writel(val, geth->base + GLOBAL_INTERRUPT_ENABLE_4_REG); <------>spin_unlock_irqrestore(&geth->irq_lock, flags); } static void gmac_enable_rx_irq(struct net_device *netdev, int enable) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>struct gemini_ethernet *geth = port->geth; <------>unsigned long flags; <------>u32 val, mask; <------>netdev_dbg(netdev, "%s device %d %s\n", __func__, netdev->dev_id, <------><------> enable ? "enable" : "disable"); <------>spin_lock_irqsave(&geth->irq_lock, flags); <------>mask = DEFAULT_Q0_INT_BIT << netdev->dev_id; <------>val = readl(geth->base + GLOBAL_INTERRUPT_ENABLE_1_REG); <------>val = enable ? (val | mask) : (val & ~mask); <------>writel(val, geth->base + GLOBAL_INTERRUPT_ENABLE_1_REG); <------>spin_unlock_irqrestore(&geth->irq_lock, flags); } static struct sk_buff *gmac_skb_if_good_frame(struct gemini_ethernet_port *port, <------><------><------><------><------> union gmac_rxdesc_0 word0, <------><------><------><------><------> unsigned int frame_len) { <------>unsigned int rx_csum = word0.bits.chksum_status; <------>unsigned int rx_status = word0.bits.status; <------>struct sk_buff *skb = NULL; <------>port->rx_stats[rx_status]++; <------>port->rx_csum_stats[rx_csum]++; <------>if (word0.bits.derr || word0.bits.perr || <------> rx_status || frame_len < ETH_ZLEN || <------> rx_csum >= RX_CHKSUM_IP_ERR_UNKNOWN) { <------><------>port->stats.rx_errors++; <------><------>if (frame_len < ETH_ZLEN || RX_ERROR_LENGTH(rx_status)) <------><------><------>port->stats.rx_length_errors++; <------><------>if (RX_ERROR_OVER(rx_status)) <------><------><------>port->stats.rx_over_errors++; <------><------>if (RX_ERROR_CRC(rx_status)) <------><------><------>port->stats.rx_crc_errors++; <------><------>if (RX_ERROR_FRAME(rx_status)) <------><------><------>port->stats.rx_frame_errors++; <------><------>return NULL; <------>} <------>skb = napi_get_frags(&port->napi); <------>if (!skb) <------><------>goto update_exit; <------>if (rx_csum == RX_CHKSUM_IP_UDP_TCP_OK) <------><------>skb->ip_summed = CHECKSUM_UNNECESSARY; update_exit: <------>port->stats.rx_bytes += frame_len; <------>port->stats.rx_packets++; <------>return skb; } static unsigned int gmac_rx(struct net_device *netdev, unsigned int budget) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>unsigned short m = (1 << port->rxq_order) - 1; <------>struct gemini_ethernet *geth = port->geth; <------>void __iomem *ptr_reg = port->rxq_rwptr; <------>unsigned int frame_len, frag_len; <------>struct gmac_rxdesc *rx = NULL; <------>struct gmac_queue_page *gpage; <------>static struct sk_buff *skb; <------>union gmac_rxdesc_0 word0; <------>union gmac_rxdesc_1 word1; <------>union gmac_rxdesc_3 word3; <------>struct page *page = NULL; <------>unsigned int page_offs; <------>unsigned short r, w; <------>union dma_rwptr rw; <------>dma_addr_t mapping; <------>int frag_nr = 0; <------>rw.bits32 = readl(ptr_reg); <------>/* Reset interrupt as all packages until here are taken into account */ <------>writel(DEFAULT_Q0_INT_BIT << netdev->dev_id, <------> geth->base + GLOBAL_INTERRUPT_STATUS_1_REG); <------>r = rw.bits.rptr; <------>w = rw.bits.wptr; <------>while (budget && w != r) { <------><------>rx = port->rxq_ring + r; <------><------>word0 = rx->word0; <------><------>word1 = rx->word1; <------><------>mapping = rx->word2.buf_adr; <------><------>word3 = rx->word3; <------><------>r++; <------><------>r &= m; <------><------>frag_len = word0.bits.buffer_size; <------><------>frame_len = word1.bits.byte_count; <------><------>page_offs = mapping & ~PAGE_MASK; <------><------>if (!mapping) { <------><------><------>netdev_err(netdev, <------><------><------><------> "rxq[%u]: HW BUG: zero DMA desc\n", r); <------><------><------>goto err_drop; <------><------>} <------><------>/* Freeq pointers are one page off */ <------><------>gpage = gmac_get_queue_page(geth, port, mapping + PAGE_SIZE); <------><------>if (!gpage) { <------><------><------>dev_err(geth->dev, "could not find mapping\n"); <------><------><------>continue; <------><------>} <------><------>page = gpage->page; <------><------>if (word3.bits32 & SOF_BIT) { <------><------><------>if (skb) { <------><------><------><------>napi_free_frags(&port->napi); <------><------><------><------>port->stats.rx_dropped++; <------><------><------>} <------><------><------>skb = gmac_skb_if_good_frame(port, word0, frame_len); <------><------><------>if (!skb) <------><------><------><------>goto err_drop; <------><------><------>page_offs += NET_IP_ALIGN; <------><------><------>frag_len -= NET_IP_ALIGN; <------><------><------>frag_nr = 0; <------><------>} else if (!skb) { <------><------><------>put_page(page); <------><------><------>continue; <------><------>} <------><------>if (word3.bits32 & EOF_BIT) <------><------><------>frag_len = frame_len - skb->len; <------><------>/* append page frag to skb */ <------><------>if (frag_nr == MAX_SKB_FRAGS) <------><------><------>goto err_drop; <------><------>if (frag_len == 0) <------><------><------>netdev_err(netdev, "Received fragment with len = 0\n"); <------><------>skb_fill_page_desc(skb, frag_nr, page, page_offs, frag_len); <------><------>skb->len += frag_len; <------><------>skb->data_len += frag_len; <------><------>skb->truesize += frag_len; <------><------>frag_nr++; <------><------>if (word3.bits32 & EOF_BIT) { <------><------><------>napi_gro_frags(&port->napi); <------><------><------>skb = NULL; <------><------><------>--budget; <------><------>} <------><------>continue; err_drop: <------><------>if (skb) { <------><------><------>napi_free_frags(&port->napi); <------><------><------>skb = NULL; <------><------>} <------><------>if (mapping) <------><------><------>put_page(page); <------><------>port->stats.rx_dropped++; <------>} <------>writew(r, ptr_reg); <------>return budget; } static int gmac_napi_poll(struct napi_struct *napi, int budget) { <------>struct gemini_ethernet_port *port = netdev_priv(napi->dev); <------>struct gemini_ethernet *geth = port->geth; <------>unsigned int freeq_threshold; <------>unsigned int received; <------>freeq_threshold = 1 << (geth->freeq_order - 1); <------>u64_stats_update_begin(&port->rx_stats_syncp); <------>received = gmac_rx(napi->dev, budget); <------>if (received < budget) { <------><------>napi_gro_flush(napi, false); <------><------>napi_complete_done(napi, received); <------><------>gmac_enable_rx_irq(napi->dev, 1); <------><------>++port->rx_napi_exits; <------>} <------>port->freeq_refill += (budget - received); <------>if (port->freeq_refill > freeq_threshold) { <------><------>port->freeq_refill -= freeq_threshold; <------><------>geth_fill_freeq(geth, true); <------>} <------>u64_stats_update_end(&port->rx_stats_syncp); <------>return received; } static void gmac_dump_dma_state(struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>struct gemini_ethernet *geth = port->geth; <------>void __iomem *ptr_reg; <------>u32 reg[5]; <------>/* Interrupt status */ <------>reg[0] = readl(geth->base + GLOBAL_INTERRUPT_STATUS_0_REG); <------>reg[1] = readl(geth->base + GLOBAL_INTERRUPT_STATUS_1_REG); <------>reg[2] = readl(geth->base + GLOBAL_INTERRUPT_STATUS_2_REG); <------>reg[3] = readl(geth->base + GLOBAL_INTERRUPT_STATUS_3_REG); <------>reg[4] = readl(geth->base + GLOBAL_INTERRUPT_STATUS_4_REG); <------>netdev_err(netdev, "IRQ status: 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n", <------><------> reg[0], reg[1], reg[2], reg[3], reg[4]); <------>/* Interrupt enable */ <------>reg[0] = readl(geth->base + GLOBAL_INTERRUPT_ENABLE_0_REG); <------>reg[1] = readl(geth->base + GLOBAL_INTERRUPT_ENABLE_1_REG); <------>reg[2] = readl(geth->base + GLOBAL_INTERRUPT_ENABLE_2_REG); <------>reg[3] = readl(geth->base + GLOBAL_INTERRUPT_ENABLE_3_REG); <------>reg[4] = readl(geth->base + GLOBAL_INTERRUPT_ENABLE_4_REG); <------>netdev_err(netdev, "IRQ enable: 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n", <------><------> reg[0], reg[1], reg[2], reg[3], reg[4]); <------>/* RX DMA status */ <------>reg[0] = readl(port->dma_base + GMAC_DMA_RX_FIRST_DESC_REG); <------>reg[1] = readl(port->dma_base + GMAC_DMA_RX_CURR_DESC_REG); <------>reg[2] = GET_RPTR(port->rxq_rwptr); <------>reg[3] = GET_WPTR(port->rxq_rwptr); <------>netdev_err(netdev, "RX DMA regs: 0x%08x 0x%08x, ptr: %u %u\n", <------><------> reg[0], reg[1], reg[2], reg[3]); <------>reg[0] = readl(port->dma_base + GMAC_DMA_RX_DESC_WORD0_REG); <------>reg[1] = readl(port->dma_base + GMAC_DMA_RX_DESC_WORD1_REG); <------>reg[2] = readl(port->dma_base + GMAC_DMA_RX_DESC_WORD2_REG); <------>reg[3] = readl(port->dma_base + GMAC_DMA_RX_DESC_WORD3_REG); <------>netdev_err(netdev, "RX DMA descriptor: 0x%08x 0x%08x 0x%08x 0x%08x\n", <------><------> reg[0], reg[1], reg[2], reg[3]); <------>/* TX DMA status */ <------>ptr_reg = port->dma_base + GMAC_SW_TX_QUEUE0_PTR_REG; <------>reg[0] = readl(port->dma_base + GMAC_DMA_TX_FIRST_DESC_REG); <------>reg[1] = readl(port->dma_base + GMAC_DMA_TX_CURR_DESC_REG); <------>reg[2] = GET_RPTR(ptr_reg); <------>reg[3] = GET_WPTR(ptr_reg); <------>netdev_err(netdev, "TX DMA regs: 0x%08x 0x%08x, ptr: %u %u\n", <------><------> reg[0], reg[1], reg[2], reg[3]); <------>reg[0] = readl(port->dma_base + GMAC_DMA_TX_DESC_WORD0_REG); <------>reg[1] = readl(port->dma_base + GMAC_DMA_TX_DESC_WORD1_REG); <------>reg[2] = readl(port->dma_base + GMAC_DMA_TX_DESC_WORD2_REG); <------>reg[3] = readl(port->dma_base + GMAC_DMA_TX_DESC_WORD3_REG); <------>netdev_err(netdev, "TX DMA descriptor: 0x%08x 0x%08x 0x%08x 0x%08x\n", <------><------> reg[0], reg[1], reg[2], reg[3]); <------>/* FREE queues status */ <------>ptr_reg = geth->base + GLOBAL_SWFQ_RWPTR_REG; <------>reg[0] = GET_RPTR(ptr_reg); <------>reg[1] = GET_WPTR(ptr_reg); <------>ptr_reg = geth->base + GLOBAL_HWFQ_RWPTR_REG; <------>reg[2] = GET_RPTR(ptr_reg); <------>reg[3] = GET_WPTR(ptr_reg); <------>netdev_err(netdev, "FQ SW ptr: %u %u, HW ptr: %u %u\n", <------><------> reg[0], reg[1], reg[2], reg[3]); } static void gmac_update_hw_stats(struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>unsigned int rx_discards, rx_mcast, rx_bcast; <------>struct gemini_ethernet *geth = port->geth; <------>unsigned long flags; <------>spin_lock_irqsave(&geth->irq_lock, flags); <------>u64_stats_update_begin(&port->ir_stats_syncp); <------>rx_discards = readl(port->gmac_base + GMAC_IN_DISCARDS); <------>port->hw_stats[0] += rx_discards; <------>port->hw_stats[1] += readl(port->gmac_base + GMAC_IN_ERRORS); <------>rx_mcast = readl(port->gmac_base + GMAC_IN_MCAST); <------>port->hw_stats[2] += rx_mcast; <------>rx_bcast = readl(port->gmac_base + GMAC_IN_BCAST); <------>port->hw_stats[3] += rx_bcast; <------>port->hw_stats[4] += readl(port->gmac_base + GMAC_IN_MAC1); <------>port->hw_stats[5] += readl(port->gmac_base + GMAC_IN_MAC2); <------>port->stats.rx_missed_errors += rx_discards; <------>port->stats.multicast += rx_mcast; <------>port->stats.multicast += rx_bcast; <------>writel(GMAC0_MIB_INT_BIT << (netdev->dev_id * 8), <------> geth->base + GLOBAL_INTERRUPT_STATUS_4_REG); <------>u64_stats_update_end(&port->ir_stats_syncp); <------>spin_unlock_irqrestore(&geth->irq_lock, flags); } /** * 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) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>struct gemini_ethernet *geth = port->geth; <------>void __iomem *irqif_reg, *irqen_reg; <------>unsigned int offs, val; <------>/* Calculate the offset using the stride of the status registers */ <------>offs = i * (GLOBAL_INTERRUPT_STATUS_1_REG - <------><------> GLOBAL_INTERRUPT_STATUS_0_REG); <------>irqif_reg = geth->base + GLOBAL_INTERRUPT_STATUS_0_REG + offs; <------>irqen_reg = geth->base + GLOBAL_INTERRUPT_ENABLE_0_REG + offs; <------>val = readl(irqif_reg) & readl(irqen_reg); <------>return val; } static enum hrtimer_restart gmac_coalesce_delay_expired(struct hrtimer *timer) { <------>struct gemini_ethernet_port *port = <------><------>container_of(timer, struct gemini_ethernet_port, <------><------><------> rx_coalesce_timer); <------>napi_schedule(&port->napi); <------>return HRTIMER_NORESTART; } static irqreturn_t gmac_irq(int irq, void *data) { <------>struct gemini_ethernet_port *port; <------>struct net_device *netdev = data; <------>struct gemini_ethernet *geth; <------>u32 val, orr = 0; <------>port = netdev_priv(netdev); <------>geth = port->geth; <------>val = gmac_get_intr_flags(netdev, 0); <------>orr |= val; <------>if (val & (GMAC0_IRQ0_2 << (netdev->dev_id * 2))) { <------><------>/* Oh, crap */ <------><------>netdev_err(netdev, "hw failure/sw bug\n"); <------><------>gmac_dump_dma_state(netdev); <------><------>/* don't know how to recover, just reduce losses */ <------><------>gmac_enable_irq(netdev, 0); <------><------>return IRQ_HANDLED; <------>} <------>if (val & (GMAC0_IRQ0_TXQ0_INTS << (netdev->dev_id * 6))) <------><------>gmac_tx_irq(netdev, 0); <------>val = gmac_get_intr_flags(netdev, 1); <------>orr |= val; <------>if (val & (DEFAULT_Q0_INT_BIT << netdev->dev_id)) { <------><------>gmac_enable_rx_irq(netdev, 0); <------><------>if (!port->rx_coalesce_nsecs) { <------><------><------>napi_schedule(&port->napi); <------><------>} else { <------><------><------>ktime_t ktime; <------><------><------>ktime = ktime_set(0, port->rx_coalesce_nsecs); <------><------><------>hrtimer_start(&port->rx_coalesce_timer, ktime, <------><------><------><------> HRTIMER_MODE_REL); <------><------>} <------>} <------>val = gmac_get_intr_flags(netdev, 4); <------>orr |= val; <------>if (val & (GMAC0_MIB_INT_BIT << (netdev->dev_id * 8))) <------><------>gmac_update_hw_stats(netdev); <------>if (val & (GMAC0_RX_OVERRUN_INT_BIT << (netdev->dev_id * 8))) { <------><------>writel(GMAC0_RXDERR_INT_BIT << (netdev->dev_id * 8), <------><------> geth->base + GLOBAL_INTERRUPT_STATUS_4_REG); <------><------>spin_lock(&geth->irq_lock); <------><------>u64_stats_update_begin(&port->ir_stats_syncp); <------><------>++port->stats.rx_fifo_errors; <------><------>u64_stats_update_end(&port->ir_stats_syncp); <------><------>spin_unlock(&geth->irq_lock); <------>} <------>return orr ? IRQ_HANDLED : IRQ_NONE; } static void gmac_start_dma(struct gemini_ethernet_port *port) { <------>void __iomem *dma_ctrl_reg = port->dma_base + GMAC_DMA_CTRL_REG; <------>union gmac_dma_ctrl dma_ctrl; <------>dma_ctrl.bits32 = readl(dma_ctrl_reg); <------>dma_ctrl.bits.rd_enable = 1; <------>dma_ctrl.bits.td_enable = 1; <------>dma_ctrl.bits.loopback = 0; <------>dma_ctrl.bits.drop_small_ack = 0; <------>dma_ctrl.bits.rd_insert_bytes = NET_IP_ALIGN; <------>dma_ctrl.bits.rd_prot = HPROT_DATA_CACHE | HPROT_PRIVILIGED; <------>dma_ctrl.bits.rd_burst_size = HBURST_INCR8; <------>dma_ctrl.bits.rd_bus = HSIZE_8; <------>dma_ctrl.bits.td_prot = HPROT_DATA_CACHE; <------>dma_ctrl.bits.td_burst_size = HBURST_INCR8; <------>dma_ctrl.bits.td_bus = HSIZE_8; <------>writel(dma_ctrl.bits32, dma_ctrl_reg); } static void gmac_stop_dma(struct gemini_ethernet_port *port) { <------>void __iomem *dma_ctrl_reg = port->dma_base + GMAC_DMA_CTRL_REG; <------>union gmac_dma_ctrl dma_ctrl; <------>dma_ctrl.bits32 = readl(dma_ctrl_reg); <------>dma_ctrl.bits.rd_enable = 0; <------>dma_ctrl.bits.td_enable = 0; <------>writel(dma_ctrl.bits32, dma_ctrl_reg); } static int gmac_open(struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>int err; <------>err = request_irq(netdev->irq, gmac_irq, <------><------><------> IRQF_SHARED, netdev->name, netdev); <------>if (err) { <------><------>netdev_err(netdev, "no IRQ\n"); <------><------>return err; <------>} <------>netif_carrier_off(netdev); <------>phy_start(netdev->phydev); <------>err = geth_resize_freeq(port); <------>/* It's fine if it's just busy, the other port has set up <------> * the freeq in that case. <------> */ <------>if (err && (err != -EBUSY)) { <------><------>netdev_err(netdev, "could not resize freeq\n"); <------><------>goto err_stop_phy; <------>} <------>err = gmac_setup_rxq(netdev); <------>if (err) { <------><------>netdev_err(netdev, "could not setup RXQ\n"); <------><------>goto err_stop_phy; <------>} <------>err = gmac_setup_txqs(netdev); <------>if (err) { <------><------>netdev_err(netdev, "could not setup TXQs\n"); <------><------>gmac_cleanup_rxq(netdev); <------><------>goto err_stop_phy; <------>} <------>napi_enable(&port->napi); <------>gmac_start_dma(port); <------>gmac_enable_irq(netdev, 1); <------>gmac_enable_tx_rx(netdev); <------>netif_tx_start_all_queues(netdev); <------>hrtimer_init(&port->rx_coalesce_timer, CLOCK_MONOTONIC, <------><------> HRTIMER_MODE_REL); <------>port->rx_coalesce_timer.function = &gmac_coalesce_delay_expired; <------>netdev_dbg(netdev, "opened\n"); <------>return 0; err_stop_phy: <------>phy_stop(netdev->phydev); <------>free_irq(netdev->irq, netdev); <------>return err; } static int gmac_stop(struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>hrtimer_cancel(&port->rx_coalesce_timer); <------>netif_tx_stop_all_queues(netdev); <------>gmac_disable_tx_rx(netdev); <------>gmac_stop_dma(port); <------>napi_disable(&port->napi); <------>gmac_enable_irq(netdev, 0); <------>gmac_cleanup_rxq(netdev); <------>gmac_cleanup_txqs(netdev); <------>phy_stop(netdev->phydev); <------>free_irq(netdev->irq, netdev); <------>gmac_update_hw_stats(netdev); <------>return 0; } static void gmac_set_rx_mode(struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>union gmac_rx_fltr filter = { .bits = { <------><------>.broadcast = 1, <------><------>.multicast = 1, <------><------>.unicast = 1, <------>} }; <------>struct netdev_hw_addr *ha; <------>unsigned int bit_nr; <------>u32 mc_filter[2]; <------>mc_filter[1] = 0; <------>mc_filter[0] = 0; <------>if (netdev->flags & IFF_PROMISC) { <------><------>filter.bits.error = 1; <------><------>filter.bits.promiscuous = 1; <------><------>mc_filter[1] = ~0; <------><------>mc_filter[0] = ~0; <------>} else if (netdev->flags & IFF_ALLMULTI) { <------><------>mc_filter[1] = ~0; <------><------>mc_filter[0] = ~0; <------>} else { <------><------>netdev_for_each_mc_addr(ha, netdev) { <------><------><------>bit_nr = ~crc32_le(~0, ha->addr, ETH_ALEN) & 0x3f; <------><------><------>mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 0x1f); <------><------>} <------>} <------>writel(mc_filter[0], port->gmac_base + GMAC_MCAST_FIL0); <------>writel(mc_filter[1], port->gmac_base + GMAC_MCAST_FIL1); <------>writel(filter.bits32, port->gmac_base + GMAC_RX_FLTR); } static void gmac_write_mac_address(struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>__le32 addr[3]; <------>memset(addr, 0, sizeof(addr)); <------>memcpy(addr, netdev->dev_addr, ETH_ALEN); <------>writel(le32_to_cpu(addr[0]), port->gmac_base + GMAC_STA_ADD0); <------>writel(le32_to_cpu(addr[1]), port->gmac_base + GMAC_STA_ADD1); <------>writel(le32_to_cpu(addr[2]), port->gmac_base + GMAC_STA_ADD2); } static int gmac_set_mac_address(struct net_device *netdev, void *addr) { <------>struct sockaddr *sa = addr; <------>memcpy(netdev->dev_addr, sa->sa_data, ETH_ALEN); <------>gmac_write_mac_address(netdev); <------>return 0; } static void gmac_clear_hw_stats(struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>readl(port->gmac_base + GMAC_IN_DISCARDS); <------>readl(port->gmac_base + GMAC_IN_ERRORS); <------>readl(port->gmac_base + GMAC_IN_MCAST); <------>readl(port->gmac_base + GMAC_IN_BCAST); <------>readl(port->gmac_base + GMAC_IN_MAC1); <------>readl(port->gmac_base + GMAC_IN_MAC2); } static void gmac_get_stats64(struct net_device *netdev, <------><------><------> struct rtnl_link_stats64 *stats) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>unsigned int start; <------>gmac_update_hw_stats(netdev); <------>/* Racing with RX NAPI */ <------>do { <------><------>start = u64_stats_fetch_begin(&port->rx_stats_syncp); <------><------>stats->rx_packets = port->stats.rx_packets; <------><------>stats->rx_bytes = port->stats.rx_bytes; <------><------>stats->rx_errors = port->stats.rx_errors; <------><------>stats->rx_dropped = port->stats.rx_dropped; <------><------>stats->rx_length_errors = port->stats.rx_length_errors; <------><------>stats->rx_over_errors = port->stats.rx_over_errors; <------><------>stats->rx_crc_errors = port->stats.rx_crc_errors; <------><------>stats->rx_frame_errors = port->stats.rx_frame_errors; <------>} while (u64_stats_fetch_retry(&port->rx_stats_syncp, start)); <------>/* Racing with MIB and TX completion interrupts */ <------>do { <------><------>start = u64_stats_fetch_begin(&port->ir_stats_syncp); <------><------>stats->tx_errors = port->stats.tx_errors; <------><------>stats->tx_packets = port->stats.tx_packets; <------><------>stats->tx_bytes = port->stats.tx_bytes; <------><------>stats->multicast = port->stats.multicast; <------><------>stats->rx_missed_errors = port->stats.rx_missed_errors; <------><------>stats->rx_fifo_errors = port->stats.rx_fifo_errors; <------>} while (u64_stats_fetch_retry(&port->ir_stats_syncp, start)); <------>/* Racing with hard_start_xmit */ <------>do { <------><------>start = u64_stats_fetch_begin(&port->tx_stats_syncp); <------><------>stats->tx_dropped = port->stats.tx_dropped; <------>} while (u64_stats_fetch_retry(&port->tx_stats_syncp, start)); <------>stats->rx_dropped += stats->rx_missed_errors; } static int gmac_change_mtu(struct net_device *netdev, int new_mtu) { <------>int max_len = gmac_pick_rx_max_len(new_mtu); <------>if (max_len < 0) <------><------>return -EINVAL; <------>gmac_disable_tx_rx(netdev); <------>netdev->mtu = new_mtu; <------>gmac_update_config0_reg(netdev, max_len << CONFIG0_MAXLEN_SHIFT, <------><------><------><------>CONFIG0_MAXLEN_MASK); <------>netdev_update_features(netdev); <------>gmac_enable_tx_rx(netdev); <------>return 0; } static netdev_features_t gmac_fix_features(struct net_device *netdev, <------><------><------><------><------> netdev_features_t features) { <------>if (netdev->mtu + ETH_HLEN + VLAN_HLEN > MTU_SIZE_BIT_MASK) <------><------>features &= ~GMAC_OFFLOAD_FEATURES; <------>return features; } static int gmac_set_features(struct net_device *netdev, <------><------><------> netdev_features_t features) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>int enable = features & NETIF_F_RXCSUM; <------>unsigned long flags; <------>u32 reg; <------>spin_lock_irqsave(&port->config_lock, flags); <------>reg = readl(port->gmac_base + GMAC_CONFIG0); <------>reg = enable ? reg | CONFIG0_RX_CHKSUM : reg & ~CONFIG0_RX_CHKSUM; <------>writel(reg, port->gmac_base + GMAC_CONFIG0); <------>spin_unlock_irqrestore(&port->config_lock, flags); <------>return 0; } static int gmac_get_sset_count(struct net_device *netdev, int sset) { <------>return sset == ETH_SS_STATS ? GMAC_STATS_NUM : 0; } static void gmac_get_strings(struct net_device *netdev, u32 stringset, u8 *data) { <------>if (stringset != ETH_SS_STATS) <------><------>return; <------>memcpy(data, gmac_stats_strings, sizeof(gmac_stats_strings)); } static void gmac_get_ethtool_stats(struct net_device *netdev, <------><------><------><------> struct ethtool_stats *estats, u64 *values) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>unsigned int start; <------>u64 *p; <------>int i; <------>gmac_update_hw_stats(netdev); <------>/* Racing with MIB interrupt */ <------>do { <------><------>p = values; <------><------>start = u64_stats_fetch_begin(&port->ir_stats_syncp); <------><------>for (i = 0; i < RX_STATS_NUM; i++) <------><------><------>*p++ = port->hw_stats[i]; <------>} while (u64_stats_fetch_retry(&port->ir_stats_syncp, start)); <------>values = p; <------>/* Racing with RX NAPI */ <------>do { <------><------>p = values; <------><------>start = u64_stats_fetch_begin(&port->rx_stats_syncp); <------><------>for (i = 0; i < RX_STATUS_NUM; i++) <------><------><------>*p++ = port->rx_stats[i]; <------><------>for (i = 0; i < RX_CHKSUM_NUM; i++) <------><------><------>*p++ = port->rx_csum_stats[i]; <------><------>*p++ = port->rx_napi_exits; <------>} while (u64_stats_fetch_retry(&port->rx_stats_syncp, start)); <------>values = p; <------>/* Racing with TX start_xmit */ <------>do { <------><------>p = values; <------><------>start = u64_stats_fetch_begin(&port->tx_stats_syncp); <------><------>for (i = 0; i < TX_MAX_FRAGS; i++) { <------><------><------>*values++ = port->tx_frag_stats[i]; <------><------><------>port->tx_frag_stats[i] = 0; <------><------>} <------><------>*values++ = port->tx_frags_linearized; <------><------>*values++ = port->tx_hw_csummed; <------>} while (u64_stats_fetch_retry(&port->tx_stats_syncp, start)); } static int gmac_get_ksettings(struct net_device *netdev, <------><------><------> struct ethtool_link_ksettings *cmd) { <------>if (!netdev->phydev) <------><------>return -ENXIO; <------>phy_ethtool_ksettings_get(netdev->phydev, cmd); <------>return 0; } static int gmac_set_ksettings(struct net_device *netdev, <------><------><------> const struct ethtool_link_ksettings *cmd) { <------>if (!netdev->phydev) <------><------>return -ENXIO; <------>return phy_ethtool_ksettings_set(netdev->phydev, cmd); } static int gmac_nway_reset(struct net_device *netdev) { <------>if (!netdev->phydev) <------><------>return -ENXIO; <------>return phy_start_aneg(netdev->phydev); } static void gmac_get_pauseparam(struct net_device *netdev, <------><------><------><------>struct ethtool_pauseparam *pparam) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>union gmac_config0 config0; <------>config0.bits32 = readl(port->gmac_base + GMAC_CONFIG0); <------>pparam->rx_pause = config0.bits.rx_fc_en; <------>pparam->tx_pause = config0.bits.tx_fc_en; <------>pparam->autoneg = true; } static void gmac_get_ringparam(struct net_device *netdev, <------><------><------> struct ethtool_ringparam *rp) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>readl(port->gmac_base + GMAC_CONFIG0); <------>rp->rx_max_pending = 1 << 15; <------>rp->rx_mini_max_pending = 0; <------>rp->rx_jumbo_max_pending = 0; <------>rp->tx_max_pending = 1 << 15; <------>rp->rx_pending = 1 << port->rxq_order; <------>rp->rx_mini_pending = 0; <------>rp->rx_jumbo_pending = 0; <------>rp->tx_pending = 1 << port->txq_order; } static int gmac_set_ringparam(struct net_device *netdev, <------><------><------> struct ethtool_ringparam *rp) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>int err = 0; <------>if (netif_running(netdev)) <------><------>return -EBUSY; <------>if (rp->rx_pending) { <------><------>port->rxq_order = min(15, ilog2(rp->rx_pending - 1) + 1); <------><------>err = geth_resize_freeq(port); <------>} <------>if (rp->tx_pending) { <------><------>port->txq_order = min(15, ilog2(rp->tx_pending - 1) + 1); <------><------>port->irq_every_tx_packets = 1 << (port->txq_order - 2); <------>} <------>return err; } static int gmac_get_coalesce(struct net_device *netdev, <------><------><------> struct ethtool_coalesce *ecmd) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>ecmd->rx_max_coalesced_frames = 1; <------>ecmd->tx_max_coalesced_frames = port->irq_every_tx_packets; <------>ecmd->rx_coalesce_usecs = port->rx_coalesce_nsecs / 1000; <------>return 0; } static int gmac_set_coalesce(struct net_device *netdev, <------><------><------> struct ethtool_coalesce *ecmd) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>if (ecmd->tx_max_coalesced_frames < 1) <------><------>return -EINVAL; <------>if (ecmd->tx_max_coalesced_frames >= 1 << port->txq_order) <------><------>return -EINVAL; <------>port->irq_every_tx_packets = ecmd->tx_max_coalesced_frames; <------>port->rx_coalesce_nsecs = ecmd->rx_coalesce_usecs * 1000; <------>return 0; } static u32 gmac_get_msglevel(struct net_device *netdev) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>return port->msg_enable; } static void gmac_set_msglevel(struct net_device *netdev, u32 level) { <------>struct gemini_ethernet_port *port = netdev_priv(netdev); <------>port->msg_enable = level; } static void gmac_get_drvinfo(struct net_device *netdev, <------><------><------> struct ethtool_drvinfo *info) { <------>strcpy(info->driver, DRV_NAME); <------>strcpy(info->bus_info, netdev->dev_id ? "1" : "0"); } static const struct net_device_ops gmac_351x_ops = { <------>.ndo_init = gmac_init, <------>.ndo_open = gmac_open, <------>.ndo_stop = gmac_stop, <------>.ndo_start_xmit = gmac_start_xmit, <------>.ndo_tx_timeout = gmac_tx_timeout, <------>.ndo_set_rx_mode = gmac_set_rx_mode, <------>.ndo_set_mac_address = gmac_set_mac_address, <------>.ndo_get_stats64 = gmac_get_stats64, <------>.ndo_change_mtu = gmac_change_mtu, <------>.ndo_fix_features = gmac_fix_features, <------>.ndo_set_features = gmac_set_features, }; static const struct ethtool_ops gmac_351x_ethtool_ops = { <------>.supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS | <------><------><------><------> ETHTOOL_COALESCE_MAX_FRAMES, <------>.get_sset_count = gmac_get_sset_count, <------>.get_strings = gmac_get_strings, <------>.get_ethtool_stats = gmac_get_ethtool_stats, <------>.get_link = ethtool_op_get_link, <------>.get_link_ksettings = gmac_get_ksettings, <------>.set_link_ksettings = gmac_set_ksettings, <------>.nway_reset = gmac_nway_reset, <------>.get_pauseparam = gmac_get_pauseparam, <------>.get_ringparam = gmac_get_ringparam, <------>.set_ringparam = gmac_set_ringparam, <------>.get_coalesce = gmac_get_coalesce, <------>.set_coalesce = gmac_set_coalesce, <------>.get_msglevel = gmac_get_msglevel, <------>.set_msglevel = gmac_set_msglevel, <------>.get_drvinfo = gmac_get_drvinfo, }; static irqreturn_t gemini_port_irq_thread(int irq, void *data) { <------>unsigned long irqmask = SWFQ_EMPTY_INT_BIT; <------>struct gemini_ethernet_port *port = data; <------>struct gemini_ethernet *geth; <------>unsigned long flags; <------>geth = port->geth; <------>/* The queue is half empty so refill it */ <------>geth_fill_freeq(geth, true); <------>spin_lock_irqsave(&geth->irq_lock, flags); <------>/* ACK queue interrupt */ <------>writel(irqmask, geth->base + GLOBAL_INTERRUPT_STATUS_4_REG); <------>/* Enable queue interrupt again */ <------>irqmask |= readl(geth->base + GLOBAL_INTERRUPT_ENABLE_4_REG); <------>writel(irqmask, geth->base + GLOBAL_INTERRUPT_ENABLE_4_REG); <------>spin_unlock_irqrestore(&geth->irq_lock, flags); <------>return IRQ_HANDLED; } static irqreturn_t gemini_port_irq(int irq, void *data) { <------>struct gemini_ethernet_port *port = data; <------>struct gemini_ethernet *geth; <------>irqreturn_t ret = IRQ_NONE; <------>u32 val, en; <------>geth = port->geth; <------>spin_lock(&geth->irq_lock); <------>val = readl(geth->base + GLOBAL_INTERRUPT_STATUS_4_REG); <------>en = readl(geth->base + GLOBAL_INTERRUPT_ENABLE_4_REG); <------>if (val & en & SWFQ_EMPTY_INT_BIT) { <------><------>/* Disable the queue empty interrupt while we work on <------><------> * processing the queue. Also disable overrun interrupts <------><------> * as there is not much we can do about it here. <------><------> */ <------><------>en &= ~(SWFQ_EMPTY_INT_BIT | GMAC0_RX_OVERRUN_INT_BIT <------><------><------><------><------> | GMAC1_RX_OVERRUN_INT_BIT); <------><------>writel(en, geth->base + GLOBAL_INTERRUPT_ENABLE_4_REG); <------><------>ret = IRQ_WAKE_THREAD; <------>} <------>spin_unlock(&geth->irq_lock); <------>return ret; } static void gemini_port_remove(struct gemini_ethernet_port *port) { <------>if (port->netdev) { <------><------>phy_disconnect(port->netdev->phydev); <------><------>unregister_netdev(port->netdev); <------>} <------>clk_disable_unprepare(port->pclk); <------>geth_cleanup_freeq(port->geth); } static void gemini_ethernet_init(struct gemini_ethernet *geth) { <------>/* Only do this once both ports are online */ <------>if (geth->initialized) <------><------>return; <------>if (geth->port0 && geth->port1) <------><------>geth->initialized = true; <------>else <------><------>return; <------>writel(0, geth->base + GLOBAL_INTERRUPT_ENABLE_0_REG); <------>writel(0, geth->base + GLOBAL_INTERRUPT_ENABLE_1_REG); <------>writel(0, geth->base + GLOBAL_INTERRUPT_ENABLE_2_REG); <------>writel(0, geth->base + GLOBAL_INTERRUPT_ENABLE_3_REG); <------>writel(0, geth->base + GLOBAL_INTERRUPT_ENABLE_4_REG); <------>/* Interrupt config: <------> * <------> * GMAC0 intr bits ------> int0 ----> eth0 <------> * GMAC1 intr bits ------> int1 ----> eth1 <------> * TOE intr -------------> int1 ----> eth1 <------> * Classification Intr --> int0 ----> eth0 <------> * Default Q0 -----------> int0 ----> eth0 <------> * Default Q1 -----------> int1 ----> eth1 <------> * FreeQ intr -----------> int1 ----> eth1 <------> */ <------>writel(0xCCFC0FC0, geth->base + GLOBAL_INTERRUPT_SELECT_0_REG); <------>writel(0x00F00002, geth->base + GLOBAL_INTERRUPT_SELECT_1_REG); <------>writel(0xFFFFFFFF, geth->base + GLOBAL_INTERRUPT_SELECT_2_REG); <------>writel(0xFFFFFFFF, geth->base + GLOBAL_INTERRUPT_SELECT_3_REG); <------>writel(0xFF000003, geth->base + GLOBAL_INTERRUPT_SELECT_4_REG); <------>/* edge-triggered interrupts packed to level-triggered one... */ <------>writel(~0, geth->base + GLOBAL_INTERRUPT_STATUS_0_REG); <------>writel(~0, geth->base + GLOBAL_INTERRUPT_STATUS_1_REG); <------>writel(~0, geth->base + GLOBAL_INTERRUPT_STATUS_2_REG); <------>writel(~0, geth->base + GLOBAL_INTERRUPT_STATUS_3_REG); <------>writel(~0, geth->base + GLOBAL_INTERRUPT_STATUS_4_REG); <------>/* Set up queue */ <------>writel(0, geth->base + GLOBAL_SW_FREEQ_BASE_SIZE_REG); <------>writel(0, geth->base + GLOBAL_HW_FREEQ_BASE_SIZE_REG); <------>writel(0, geth->base + GLOBAL_SWFQ_RWPTR_REG); <------>writel(0, geth->base + GLOBAL_HWFQ_RWPTR_REG); <------>geth->freeq_frag_order = DEFAULT_RX_BUF_ORDER; <------>/* This makes the queue resize on probe() so that we <------> * set up and enable the queue IRQ. FIXME: fragile. <------> */ <------>geth->freeq_order = 1; } static void gemini_port_save_mac_addr(struct gemini_ethernet_port *port) { <------>port->mac_addr[0] = <------><------>cpu_to_le32(readl(port->gmac_base + GMAC_STA_ADD0)); <------>port->mac_addr[1] = <------><------>cpu_to_le32(readl(port->gmac_base + GMAC_STA_ADD1)); <------>port->mac_addr[2] = <------><------>cpu_to_le32(readl(port->gmac_base + GMAC_STA_ADD2)); } static int gemini_ethernet_port_probe(struct platform_device *pdev) { <------>char *port_names[2] = { "ethernet0", "ethernet1" }; <------>struct gemini_ethernet_port *port; <------>struct device *dev = &pdev->dev; <------>struct gemini_ethernet *geth; <------>struct net_device *netdev; <------>struct resource *gmacres; <------>struct resource *dmares; <------>struct device *parent; <------>unsigned int id; <------>int irq; <------>int ret; <------>parent = dev->parent; <------>geth = dev_get_drvdata(parent); <------>if (!strcmp(dev_name(dev), "60008000.ethernet-port")) <------><------>id = 0; <------>else if (!strcmp(dev_name(dev), "6000c000.ethernet-port")) <------><------>id = 1; <------>else <------><------>return -ENODEV; <------>dev_info(dev, "probe %s ID %d\n", dev_name(dev), id); <------>netdev = devm_alloc_etherdev_mqs(dev, sizeof(*port), TX_QUEUE_NUM, TX_QUEUE_NUM); <------>if (!netdev) { <------><------>dev_err(dev, "Can't allocate ethernet device #%d\n", id); <------><------>return -ENOMEM; <------>} <------>port = netdev_priv(netdev); <------>SET_NETDEV_DEV(netdev, dev); <------>port->netdev = netdev; <------>port->id = id; <------>port->geth = geth; <------>port->dev = dev; <------>port->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); <------>/* DMA memory */ <------>dmares = platform_get_resource(pdev, IORESOURCE_MEM, 0); <------>if (!dmares) { <------><------>dev_err(dev, "no DMA resource\n"); <------><------>return -ENODEV; <------>} <------>port->dma_base = devm_ioremap_resource(dev, dmares); <------>if (IS_ERR(port->dma_base)) <------><------>return PTR_ERR(port->dma_base); <------>/* GMAC config memory */ <------>gmacres = platform_get_resource(pdev, IORESOURCE_MEM, 1); <------>if (!gmacres) { <------><------>dev_err(dev, "no GMAC resource\n"); <------><------>return -ENODEV; <------>} <------>port->gmac_base = devm_ioremap_resource(dev, gmacres); <------>if (IS_ERR(port->gmac_base)) <------><------>return PTR_ERR(port->gmac_base); <------>/* Interrupt */ <------>irq = platform_get_irq(pdev, 0); <------>if (irq <= 0) <------><------>return irq ? irq : -ENODEV; <------>port->irq = irq; <------>/* Clock the port */ <------>port->pclk = devm_clk_get(dev, "PCLK"); <------>if (IS_ERR(port->pclk)) { <------><------>dev_err(dev, "no PCLK\n"); <------><------>return PTR_ERR(port->pclk); <------>} <------>ret = clk_prepare_enable(port->pclk); <------>if (ret) <------><------>return ret; <------>/* Maybe there is a nice ethernet address we should use */ <------>gemini_port_save_mac_addr(port); <------>/* Reset the port */ <------>port->reset = devm_reset_control_get_exclusive(dev, NULL); <------>if (IS_ERR(port->reset)) { <------><------>dev_err(dev, "no reset\n"); <------><------>ret = PTR_ERR(port->reset); <------><------>goto unprepare; <------>} <------>reset_control_reset(port->reset); <------>usleep_range(100, 500); <------>/* Assign pointer in the main state container */ <------>if (!id) <------><------>geth->port0 = port; <------>else <------><------>geth->port1 = port; <------>/* This will just be done once both ports are up and reset */ <------>gemini_ethernet_init(geth); <------>platform_set_drvdata(pdev, port); <------>/* Set up and register the netdev */ <------>netdev->dev_id = port->id; <------>netdev->irq = irq; <------>netdev->netdev_ops = &gmac_351x_ops; <------>netdev->ethtool_ops = &gmac_351x_ethtool_ops; <------>spin_lock_init(&port->config_lock); <------>gmac_clear_hw_stats(netdev); <------>netdev->hw_features = GMAC_OFFLOAD_FEATURES; <------>netdev->features |= GMAC_OFFLOAD_FEATURES | NETIF_F_GRO; <------>/* We can handle jumbo frames up to 10236 bytes so, let's accept <------> * payloads of 10236 bytes minus VLAN and ethernet header <------> */ <------>netdev->min_mtu = ETH_MIN_MTU; <------>netdev->max_mtu = 10236 - VLAN_ETH_HLEN; <------>port->freeq_refill = 0; <------>netif_napi_add(netdev, &port->napi, gmac_napi_poll, <------><------> DEFAULT_NAPI_WEIGHT); <------>if (is_valid_ether_addr((void *)port->mac_addr)) { <------><------>memcpy(netdev->dev_addr, port->mac_addr, ETH_ALEN); <------>} else { <------><------>dev_dbg(dev, "ethernet address 0x%08x%08x%08x invalid\n", <------><------><------>port->mac_addr[0], port->mac_addr[1], <------><------><------>port->mac_addr[2]); <------><------>dev_info(dev, "using a random ethernet address\n"); <------><------>eth_random_addr(netdev->dev_addr); <------>} <------>gmac_write_mac_address(netdev); <------>ret = devm_request_threaded_irq(port->dev, <------><------><------><------><------>port->irq, <------><------><------><------><------>gemini_port_irq, <------><------><------><------><------>gemini_port_irq_thread, <------><------><------><------><------>IRQF_SHARED, <------><------><------><------><------>port_names[port->id], <------><------><------><------><------>port); <------>if (ret) <------><------>goto unprepare; <------>ret = gmac_setup_phy(netdev); <------>if (ret) { <------><------>netdev_err(netdev, <------><------><------> "PHY init failed\n"); <------><------>goto unprepare; <------>} <------>ret = register_netdev(netdev); <------>if (ret) <------><------>goto unprepare; <------>netdev_info(netdev, <------><------> "irq %d, DMA @ 0x%pap, GMAC @ 0x%pap\n", <------><------> port->irq, &dmares->start, <------><------> &gmacres->start); <------>return 0; unprepare: <------>clk_disable_unprepare(port->pclk); <------>return ret; } static int gemini_ethernet_port_remove(struct platform_device *pdev) { <------>struct gemini_ethernet_port *port = platform_get_drvdata(pdev); <------>gemini_port_remove(port); <------>return 0; } static const struct of_device_id gemini_ethernet_port_of_match[] = { <------>{ <------><------>.compatible = "cortina,gemini-ethernet-port", <------>}, <------>{}, }; MODULE_DEVICE_TABLE(of, gemini_ethernet_port_of_match); static struct platform_driver gemini_ethernet_port_driver = { <------>.driver = { <------><------>.name = "gemini-ethernet-port", <------><------>.of_match_table = of_match_ptr(gemini_ethernet_port_of_match), <------>}, <------>.probe = gemini_ethernet_port_probe, <------>.remove = gemini_ethernet_port_remove, }; static int gemini_ethernet_probe(struct platform_device *pdev) { <------>struct device *dev = &pdev->dev; <------>struct gemini_ethernet *geth; <------>unsigned int retry = 5; <------>struct resource *res; <------>u32 val; <------>/* Global registers */ <------>geth = devm_kzalloc(dev, sizeof(*geth), GFP_KERNEL); <------>if (!geth) <------><------>return -ENOMEM; <------>res = platform_get_resource(pdev, IORESOURCE_MEM, 0); <------>if (!res) <------><------>return -ENODEV; <------>geth->base = devm_ioremap_resource(dev, res); <------>if (IS_ERR(geth->base)) <------><------>return PTR_ERR(geth->base); <------>geth->dev = dev; <------>/* Wait for ports to stabilize */ <------>do { <------><------>udelay(2); <------><------>val = readl(geth->base + GLOBAL_TOE_VERSION_REG); <------><------>barrier(); <------>} while (!val && --retry); <------>if (!retry) { <------><------>dev_err(dev, "failed to reset ethernet\n"); <------><------>return -EIO; <------>} <------>dev_info(dev, "Ethernet device ID: 0x%03x, revision 0x%01x\n", <------><------> (val >> 4) & 0xFFFU, val & 0xFU); <------>spin_lock_init(&geth->irq_lock); <------>spin_lock_init(&geth->freeq_lock); <------>/* The children will use this */ <------>platform_set_drvdata(pdev, geth); <------>/* Spawn child devices for the two ports */ <------>return devm_of_platform_populate(dev); } static int gemini_ethernet_remove(struct platform_device *pdev) { <------>struct gemini_ethernet *geth = platform_get_drvdata(pdev); <------>geth_cleanup_freeq(geth); <------>geth->initialized = false; <------>return 0; } static const struct of_device_id gemini_ethernet_of_match[] = { <------>{ <------><------>.compatible = "cortina,gemini-ethernet", <------>}, <------>{}, }; MODULE_DEVICE_TABLE(of, gemini_ethernet_of_match); static struct platform_driver gemini_ethernet_driver = { <------>.driver = { <------><------>.name = DRV_NAME, <------><------>.of_match_table = of_match_ptr(gemini_ethernet_of_match), <------>}, <------>.probe = gemini_ethernet_probe, <------>.remove = gemini_ethernet_remove, }; static int __init gemini_ethernet_module_init(void) { <------>int ret; <------>ret = platform_driver_register(&gemini_ethernet_port_driver); <------>if (ret) <------><------>return ret; <------>ret = platform_driver_register(&gemini_ethernet_driver); <------>if (ret) { <------><------>platform_driver_unregister(&gemini_ethernet_port_driver); <------><------>return ret; <------>} <------>return 0; } module_init(gemini_ethernet_module_init); static void __exit gemini_ethernet_module_exit(void) { <------>platform_driver_unregister(&gemini_ethernet_driver); <------>platform_driver_unregister(&gemini_ethernet_port_driver); } module_exit(gemini_ethernet_module_exit); MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>"); MODULE_DESCRIPTION("StorLink SL351x (Gemini) ethernet driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:" DRV_NAME);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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