/* * drivers/net/gianfar_ethtool.c * * Gianfar Ethernet Driver * Ethtool support for Gianfar Enet * Based on e1000 ethtool support * * Author: Andy Fleming * Maintainer: Kumar Gala * * Copyright (c) 2003,2004 Freescale Semiconductor, Inc. * * This software may be used and distributed according to * the terms of the GNU Public License, Version 2, incorporated herein * by reference. */ #include <linux/kernel.h> #include <linux/string.h> #include <linux/errno.h> #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/skbuff.h> #include <linux/spinlock.h> #include <linux/mm.h> #include <asm/io.h> #include <asm/irq.h> #include <asm/uaccess.h> #include <linux/module.h> #include <linux/crc32.h> #include <asm/types.h> #include <linux/ethtool.h> #include <linux/mii.h> #include <linux/phy.h> #include "gianfar.h" extern void gfar_start(struct net_device *dev); extern int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit); #define GFAR_MAX_COAL_USECS 0xffff #define GFAR_MAX_COAL_FRAMES 0xff static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, u64 * buf); static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf); static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals); static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals); static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals); static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals); static void gfar_gdrvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo); static char stat_gstrings[][ETH_GSTRING_LEN] = { "rx-dropped-by-kernel", "rx-large-frame-errors", "rx-short-frame-errors", "rx-non-octet-errors", "rx-crc-errors", "rx-overrun-errors", "rx-busy-errors", "rx-babbling-errors", "rx-truncated-frames", "ethernet-bus-error", "tx-babbling-errors", "tx-underrun-errors", "rx-skb-missing-errors", "tx-timeout-errors", "tx-rx-64-frames", "tx-rx-65-127-frames", "tx-rx-128-255-frames", "tx-rx-256-511-frames", "tx-rx-512-1023-frames", "tx-rx-1024-1518-frames", "tx-rx-1519-1522-good-vlan", "rx-bytes", "rx-packets", "rx-fcs-errors", "receive-multicast-packet", "receive-broadcast-packet", "rx-control-frame-packets", "rx-pause-frame-packets", "rx-unknown-op-code", "rx-alignment-error", "rx-frame-length-error", "rx-code-error", "rx-carrier-sense-error", "rx-undersize-packets", "rx-oversize-packets", "rx-fragmented-frames", "rx-jabber-frames", "rx-dropped-frames", "tx-byte-counter", "tx-packets", "tx-multicast-packets", "tx-broadcast-packets", "tx-pause-control-frames", "tx-deferral-packets", "tx-excessive-deferral-packets", "tx-single-collision-packets", "tx-multiple-collision-packets", "tx-late-collision-packets", "tx-excessive-collision-packets", "tx-total-collision", "reserved", "tx-dropped-frames", "tx-jabber-frames", "tx-fcs-errors", "tx-control-frames", "tx-oversize-frames", "tx-undersize-frames", "tx-fragmented-frames", }; /* Fill in a buffer with the strings which correspond to the * stats */ static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf) { struct gfar_private *priv = netdev_priv(dev); if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON) memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN); else memcpy(buf, stat_gstrings, GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN); } /* Fill in an array of 64-bit statistics from various sources. * This array will be appended to the end of the ethtool_stats * structure, and returned to user space */ static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, u64 * buf) { int i; struct gfar_private *priv = netdev_priv(dev); u64 *extra = (u64 *) & priv->extra_stats; if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON) { u32 __iomem *rmon = (u32 __iomem *) & priv->regs->rmon; struct gfar_stats *stats = (struct gfar_stats *) buf; for (i = 0; i < GFAR_RMON_LEN; i++) stats->rmon[i] = (u64) gfar_read(&rmon[i]); for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++) stats->extra[i] = extra[i]; } else for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++) buf[i] = extra[i]; } static int gfar_sset_count(struct net_device *dev, int sset) { struct gfar_private *priv = netdev_priv(dev); switch (sset) { case ETH_SS_STATS: if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON) return GFAR_STATS_LEN; else return GFAR_EXTRA_STATS_LEN; default: return -EOPNOTSUPP; } } /* Fills in the drvinfo structure with some basic info */ static void gfar_gdrvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo) { strncpy(drvinfo->driver, DRV_NAME, GFAR_INFOSTR_LEN); strncpy(drvinfo->version, gfar_driver_version, GFAR_INFOSTR_LEN); strncpy(drvinfo->fw_version, "N/A", GFAR_INFOSTR_LEN); strncpy(drvinfo->bus_info, "N/A", GFAR_INFOSTR_LEN); drvinfo->regdump_len = 0; drvinfo->eedump_len = 0; } static int gfar_ssettings(struct net_device *dev, struct ethtool_cmd *cmd) { struct gfar_private *priv = netdev_priv(dev); struct phy_device *phydev = priv->phydev; if (NULL == phydev) return -ENODEV; return phy_ethtool_sset(phydev, cmd); } /* Return the current settings in the ethtool_cmd structure */ static int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd) { struct gfar_private *priv = netdev_priv(dev); struct phy_device *phydev = priv->phydev; if (NULL == phydev) return -ENODEV; cmd->maxtxpkt = priv->txcount; cmd->maxrxpkt = priv->rxcount; return phy_ethtool_gset(phydev, cmd); } /* Return the length of the register structure */ static int gfar_reglen(struct net_device *dev) { return sizeof (struct gfar); } /* Return a dump of the GFAR register space */ static void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf) { int i; struct gfar_private *priv = netdev_priv(dev); u32 __iomem *theregs = (u32 __iomem *) priv->regs; u32 *buf = (u32 *) regbuf; for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++) buf[i] = gfar_read(&theregs[i]); } /* Convert microseconds to ethernet clock ticks, which changes * depending on what speed the controller is running at */ static unsigned int gfar_usecs2ticks(struct gfar_private *priv, unsigned int usecs) { unsigned int count; /* The timer is different, depending on the interface speed */ switch (priv->phydev->speed) { case SPEED_1000: count = GFAR_GBIT_TIME; break; case SPEED_100: count = GFAR_100_TIME; break; case SPEED_10: default: count = GFAR_10_TIME; break; } /* Make sure we return a number greater than 0 * if usecs > 0 */ return ((usecs * 1000 + count - 1) / count); } /* Convert ethernet clock ticks to microseconds */ static unsigned int gfar_ticks2usecs(struct gfar_private *priv, unsigned int ticks) { unsigned int count; /* The timer is different, depending on the interface speed */ switch (priv->phydev->speed) { case SPEED_1000: count = GFAR_GBIT_TIME; break; case SPEED_100: count = GFAR_100_TIME; break; case SPEED_10: default: count = GFAR_10_TIME; break; } /* Make sure we return a number greater than 0 */ /* if ticks is > 0 */ return ((ticks * count) / 1000); } /* Get the coalescing parameters, and put them in the cvals * structure. */ static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals) { struct gfar_private *priv = netdev_priv(dev); if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE)) return -EOPNOTSUPP; if (NULL == priv->phydev) return -ENODEV; cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, priv->rxtime); cvals->rx_max_coalesced_frames = priv->rxcount; cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, priv->txtime); cvals->tx_max_coalesced_frames = priv->txcount; cvals->use_adaptive_rx_coalesce = 0; cvals->use_adaptive_tx_coalesce = 0; cvals->pkt_rate_low = 0; cvals->rx_coalesce_usecs_low = 0; cvals->rx_max_coalesced_frames_low = 0; cvals->tx_coalesce_usecs_low = 0; cvals->tx_max_coalesced_frames_low = 0; /* When the packet rate is below pkt_rate_high but above * pkt_rate_low (both measured in packets per second) the * normal {rx,tx}_* coalescing parameters are used. */ /* When the packet rate is (measured in packets per second) * is above pkt_rate_high, the {rx,tx}_*_high parameters are * used. */ cvals->pkt_rate_high = 0; cvals->rx_coalesce_usecs_high = 0; cvals->rx_max_coalesced_frames_high = 0; cvals->tx_coalesce_usecs_high = 0; cvals->tx_max_coalesced_frames_high = 0; /* How often to do adaptive coalescing packet rate sampling, * measured in seconds. Must not be zero. */ cvals->rate_sample_interval = 0; return 0; } /* Change the coalescing values. * Both cvals->*_usecs and cvals->*_frames have to be > 0 * in order for coalescing to be active */ static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals) { struct gfar_private *priv = netdev_priv(dev); if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE)) return -EOPNOTSUPP; /* Set up rx coalescing */ if ((cvals->rx_coalesce_usecs == 0) || (cvals->rx_max_coalesced_frames == 0)) priv->rxcoalescing = 0; else priv->rxcoalescing = 1; if (NULL == priv->phydev) return -ENODEV; /* Check the bounds of the values */ if (cvals->rx_coalesce_usecs > GFAR_MAX_COAL_USECS) { pr_info("Coalescing is limited to %d microseconds\n", GFAR_MAX_COAL_USECS); return -EINVAL; } if (cvals->rx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) { pr_info("Coalescing is limited to %d frames\n", GFAR_MAX_COAL_FRAMES); return -EINVAL; } priv->rxtime = gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs); priv->rxcount = cvals->rx_max_coalesced_frames; /* Set up tx coalescing */ if ((cvals->tx_coalesce_usecs == 0) || (cvals->tx_max_coalesced_frames == 0)) priv->txcoalescing = 0; else priv->txcoalescing = 1; /* Check the bounds of the values */ if (cvals->tx_coalesce_usecs > GFAR_MAX_COAL_USECS) { pr_info("Coalescing is limited to %d microseconds\n", GFAR_MAX_COAL_USECS); return -EINVAL; } if (cvals->tx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) { pr_info("Coalescing is limited to %d frames\n", GFAR_MAX_COAL_FRAMES); return -EINVAL; } priv->txtime = gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs); priv->txcount = cvals->tx_max_coalesced_frames; if (priv->rxcoalescing) gfar_write(&priv->regs->rxic, mk_ic_value(priv->rxcount, priv->rxtime)); else gfar_write(&priv->regs->rxic, 0); if (priv->txcoalescing) gfar_write(&priv->regs->txic, mk_ic_value(priv->txcount, priv->txtime)); else gfar_write(&priv->regs->txic, 0); return 0; } /* Fills in rvals with the current ring parameters. Currently, * rx, rx_mini, and rx_jumbo rings are the same size, as mini and * jumbo are ignored by the driver */ static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals) { struct gfar_private *priv = netdev_priv(dev); rvals->rx_max_pending = GFAR_RX_MAX_RING_SIZE; rvals->rx_mini_max_pending = GFAR_RX_MAX_RING_SIZE; rvals->rx_jumbo_max_pending = GFAR_RX_MAX_RING_SIZE; rvals->tx_max_pending = GFAR_TX_MAX_RING_SIZE; /* Values changeable by the user. The valid values are * in the range 1 to the "*_max_pending" counterpart above. */ rvals->rx_pending = priv->rx_ring_size; rvals->rx_mini_pending = priv->rx_ring_size; rvals->rx_jumbo_pending = priv->rx_ring_size; rvals->tx_pending = priv->tx_ring_size; } /* Change the current ring parameters, stopping the controller if * necessary so that we don't mess things up while we're in * motion. We wait for the ring to be clean before reallocating * the rings. */ static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals) { struct gfar_private *priv = netdev_priv(dev); int err = 0; if (rvals->rx_pending > GFAR_RX_MAX_RING_SIZE) return -EINVAL; if (!is_power_of_2(rvals->rx_pending)) { printk("%s: Ring sizes must be a power of 2\n", dev->name); return -EINVAL; } if (rvals->tx_pending > GFAR_TX_MAX_RING_SIZE) return -EINVAL; if (!is_power_of_2(rvals->tx_pending)) { printk("%s: Ring sizes must be a power of 2\n", dev->name); return -EINVAL; } if (dev->flags & IFF_UP) { unsigned long flags; /* Halt TX and RX, and process the frames which * have already been received */ spin_lock_irqsave(&priv->txlock, flags); spin_lock(&priv->rxlock); gfar_halt(dev); gfar_clean_rx_ring(dev, priv->rx_ring_size); spin_unlock(&priv->rxlock); spin_unlock_irqrestore(&priv->txlock, flags); /* Now we take down the rings to rebuild them */ stop_gfar(dev); } /* Change the size */ priv->rx_ring_size = rvals->rx_pending; priv->tx_ring_size = rvals->tx_pending; /* Rebuild the rings with the new size */ if (dev->flags & IFF_UP) err = startup_gfar(dev); return err; } static int gfar_set_rx_csum(struct net_device *dev, uint32_t data) { struct gfar_private *priv = netdev_priv(dev); int err = 0; if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM)) return -EOPNOTSUPP; if (dev->flags & IFF_UP) { unsigned long flags; /* Halt TX and RX, and process the frames which * have already been received */ spin_lock_irqsave(&priv->txlock, flags); spin_lock(&priv->rxlock); gfar_halt(dev); gfar_clean_rx_ring(dev, priv->rx_ring_size); spin_unlock(&priv->rxlock); spin_unlock_irqrestore(&priv->txlock, flags); /* Now we take down the rings to rebuild them */ stop_gfar(dev); } priv->rx_csum_enable = data; if (dev->flags & IFF_UP) err = startup_gfar(dev); return err; } static uint32_t gfar_get_rx_csum(struct net_device *dev) { struct gfar_private *priv = netdev_priv(dev); if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM)) return 0; return priv->rx_csum_enable; } static int gfar_set_tx_csum(struct net_device *dev, uint32_t data) { unsigned long flags; struct gfar_private *priv = netdev_priv(dev); if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM)) return -EOPNOTSUPP; spin_lock_irqsave(&priv->txlock, flags); gfar_halt(dev); if (data) dev->features |= NETIF_F_IP_CSUM; else dev->features &= ~NETIF_F_IP_CSUM; gfar_start(dev); spin_unlock_irqrestore(&priv->txlock, flags); return 0; } static uint32_t gfar_get_tx_csum(struct net_device *dev) { struct gfar_private *priv = netdev_priv(dev); if (!(priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM)) return 0; return (dev->features & NETIF_F_IP_CSUM) != 0; } static uint32_t gfar_get_msglevel(struct net_device *dev) { struct gfar_private *priv = netdev_priv(dev); return priv->msg_enable; } static void gfar_set_msglevel(struct net_device *dev, uint32_t data) { struct gfar_private *priv = netdev_priv(dev); priv->msg_enable = data; } const struct ethtool_ops gfar_ethtool_ops = { .get_settings = gfar_gsettings, .set_settings = gfar_ssettings, .get_drvinfo = gfar_gdrvinfo, .get_regs_len = gfar_reglen, .get_regs = gfar_get_regs, .get_link = ethtool_op_get_link, .get_coalesce = gfar_gcoalesce, .set_coalesce = gfar_scoalesce, .get_ringparam = gfar_gringparam, .set_ringparam = gfar_sringparam, .get_strings = gfar_gstrings, .get_sset_count = gfar_sset_count, .get_ethtool_stats = gfar_fill_stats, .get_rx_csum = gfar_get_rx_csum, .get_tx_csum = gfar_get_tx_csum, .set_rx_csum = gfar_set_rx_csum, .set_tx_csum = gfar_set_tx_csum, .get_msglevel = gfar_get_msglevel, .set_msglevel = gfar_set_msglevel, };