drivers/net/chelsio/ixf1010.c - linux/kernel/git/davem/net-next - Git at Google

 /* $Date: 2005/11/12 02:13:49 $ $RCSfile: ixf1010.c,v $ $Revision: 1.36 $ */
 #include "gmac.h"
 #include "elmer0.h"

 /* Update fast changing statistics every 15 seconds */
 #define STATS_TICK_SECS 15
 /* 30 minutes for full statistics update */
 #define MAJOR_UPDATE_TICKS (1800 / STATS_TICK_SECS)

 /*
  * The IXF1010 can handle frames up to 16383 bytes but it's optimized for
  * frames up to 9831 (0x2667) bytes, so we limit jumbo frame size to this.
  * This length includes ethernet header and FCS.
  */
 #define MAX_FRAME_SIZE 0x2667

 /* MAC registers */
 enum {
 	/* Per-port registers */
 	REG_MACADDR_LOW = 0,
 	REG_MACADDR_HIGH = 0x4,
 	REG_FDFC_TYPE = 0xC,
 	REG_FC_TX_TIMER_VALUE = 0x1c,
 	REG_IPG_RX_TIME1 = 0x28,
 	REG_IPG_RX_TIME2 = 0x2c,
 	REG_IPG_TX_TIME = 0x30,
 	REG_PAUSE_THRES = 0x38,
 	REG_MAX_FRAME_SIZE = 0x3c,
 	REG_RGMII_SPEED = 0x40,
 	REG_FC_ENABLE = 0x48,
 	REG_DISCARD_CTRL_FRAMES = 0x54,
 	REG_DIVERSE_CONFIG = 0x60,
 	REG_RX_FILTER = 0x64,
 	REG_MC_ADDR_LOW = 0x68,
 	REG_MC_ADDR_HIGH = 0x6c,

 	REG_RX_OCTETS_OK = 0x80,
 	REG_RX_OCTETS_BAD = 0x84,
 	REG_RX_UC_PKTS = 0x88,
 	REG_RX_MC_PKTS = 0x8c,
 	REG_RX_BC_PKTS = 0x90,
 	REG_RX_FCS_ERR = 0xb0,
 	REG_RX_TAGGED = 0xb4,
 	REG_RX_DATA_ERR = 0xb8,
 	REG_RX_ALIGN_ERR = 0xbc,
 	REG_RX_LONG_ERR = 0xc0,
 	REG_RX_JABBER_ERR = 0xc4,
 	REG_RX_PAUSE_FRAMES = 0xc8,
 	REG_RX_UNKNOWN_CTRL_FRAMES = 0xcc,
 	REG_RX_VERY_LONG_ERR = 0xd0,
 	REG_RX_RUNT_ERR = 0xd4,
 	REG_RX_SHORT_ERR = 0xd8,
 	REG_RX_SYMBOL_ERR = 0xe4,

 	REG_TX_OCTETS_OK = 0x100,
 	REG_TX_OCTETS_BAD = 0x104,
 	REG_TX_UC_PKTS = 0x108,
 	REG_TX_MC_PKTS = 0x10c,
 	REG_TX_BC_PKTS = 0x110,
 	REG_TX_EXCESSIVE_LEN_DROP = 0x14c,
 	REG_TX_UNDERRUN = 0x150,
 	REG_TX_TAGGED = 0x154,
 	REG_TX_PAUSE_FRAMES = 0x15C,

 	/* Global registers */
 	REG_PORT_ENABLE = 0x1400,

 	REG_JTAG_ID = 0x1430,

 	RX_FIFO_HIGH_WATERMARK_BASE = 0x1600,
 	RX_FIFO_LOW_WATERMARK_BASE = 0x1628,
 	RX_FIFO_FRAMES_REMOVED_BASE = 0x1650,

 	REG_RX_ERR_DROP = 0x167c,
 	REG_RX_FIFO_OVERFLOW_EVENT = 0x1680,

 	TX_FIFO_HIGH_WATERMARK_BASE = 0x1800,
 	TX_FIFO_LOW_WATERMARK_BASE = 0x1828,
 	TX_FIFO_XFER_THRES_BASE = 0x1850,

 	REG_TX_FIFO_OVERFLOW_EVENT = 0x1878,
 	REG_TX_FIFO_OOS_EVENT = 0x1884,

 	TX_FIFO_FRAMES_REMOVED_BASE = 0x1888,

 	REG_SPI_RX_BURST = 0x1c00,
 	REG_SPI_RX_TRAINING = 0x1c04,
 	REG_SPI_RX_CALENDAR = 0x1c08,
 	REG_SPI_TX_SYNC = 0x1c0c
 };

 enum {                     /* RMON registers */
 	REG_RxOctetsTotalOK = 0x80,
 	REG_RxOctetsBad = 0x84,
 	REG_RxUCPkts = 0x88,
 	REG_RxMCPkts = 0x8c,
 	REG_RxBCPkts = 0x90,
 	REG_RxJumboPkts = 0xac,
 	REG_RxFCSErrors = 0xb0,
 	REG_RxDataErrors = 0xb8,
 	REG_RxAlignErrors = 0xbc,
 	REG_RxLongErrors = 0xc0,
 	REG_RxJabberErrors = 0xc4,
 	REG_RxPauseMacControlCounter = 0xc8,
 	REG_RxVeryLongErrors = 0xd0,
 	REG_RxRuntErrors = 0xd4,
 	REG_RxShortErrors = 0xd8,
 	REG_RxSequenceErrors = 0xe0,
 	REG_RxSymbolErrors = 0xe4,

 	REG_TxOctetsTotalOK = 0x100,
 	REG_TxOctetsBad = 0x104,
 	REG_TxUCPkts = 0x108,
 	REG_TxMCPkts = 0x10c,
 	REG_TxBCPkts = 0x110,
 	REG_TxJumboPkts = 0x12C,
 	REG_TxTotalCollisions = 0x134,
 	REG_TxExcessiveLengthDrop = 0x14c,
 	REG_TxUnderrun = 0x150,
 	REG_TxCRCErrors = 0x158,
 	REG_TxPauseFrames = 0x15c
 };

 enum {
 	DIVERSE_CONFIG_PAD_ENABLE = 0x80,
 	DIVERSE_CONFIG_CRC_ADD = 0x40
 };

 #define MACREG_BASE            0
 #define MACREG(mac, mac_reg)   ((mac)->instance->mac_base + (mac_reg))

 struct _cmac_instance {
 	u32 mac_base;
 	u32 index;
 	u32 version;
 	u32 ticks;
 };

 static void disable_port(struct cmac *mac)
 {
 	u32 val;

 	t1_tpi_read(mac->adapter, REG_PORT_ENABLE, &val);
 	val &= ~(1 << mac->instance->index);
 	t1_tpi_write(mac->adapter, REG_PORT_ENABLE, val);
 }

 /*
  * Read the current values of the RMON counters and add them to the cumulative
  * port statistics.  The HW RMON counters are cleared by this operation.
  */
 static void port_stats_update(struct cmac *mac)
 {
 	static struct {
 		unsigned int reg;
 		unsigned int offset;
 	} hw_stats[] = {

 #define HW_STAT(name, stat_name) \
 	{ REG_##name, \
 	  (&((struct cmac_statistics *)NULL)->stat_name) - (u64 *)NULL }

 		/* Rx stats */
 		HW_STAT(RxOctetsTotalOK, RxOctetsOK),
 		HW_STAT(RxOctetsBad, RxOctetsBad),
 		HW_STAT(RxUCPkts, RxUnicastFramesOK),
 		HW_STAT(RxMCPkts, RxMulticastFramesOK),
 		HW_STAT(RxBCPkts, RxBroadcastFramesOK),
 		HW_STAT(RxJumboPkts, RxJumboFramesOK),
 		HW_STAT(RxFCSErrors, RxFCSErrors),
 		HW_STAT(RxAlignErrors, RxAlignErrors),
 		HW_STAT(RxLongErrors, RxFrameTooLongErrors),
 		HW_STAT(RxVeryLongErrors, RxFrameTooLongErrors),
 		HW_STAT(RxPauseMacControlCounter, RxPauseFrames),
 		HW_STAT(RxDataErrors, RxDataErrors),
 		HW_STAT(RxJabberErrors, RxJabberErrors),
 		HW_STAT(RxRuntErrors, RxRuntErrors),
 		HW_STAT(RxShortErrors, RxRuntErrors),
 		HW_STAT(RxSequenceErrors, RxSequenceErrors),
 		HW_STAT(RxSymbolErrors, RxSymbolErrors),

 		/* Tx stats (skip collision stats as we are full-duplex only) */
 		HW_STAT(TxOctetsTotalOK, TxOctetsOK),
 		HW_STAT(TxOctetsBad, TxOctetsBad),
 		HW_STAT(TxUCPkts, TxUnicastFramesOK),
 		HW_STAT(TxMCPkts, TxMulticastFramesOK),
 		HW_STAT(TxBCPkts, TxBroadcastFramesOK),
 		HW_STAT(TxJumboPkts, TxJumboFramesOK),
 		HW_STAT(TxPauseFrames, TxPauseFrames),
 		HW_STAT(TxExcessiveLengthDrop, TxLengthErrors),
 		HW_STAT(TxUnderrun, TxUnderrun),
 		HW_STAT(TxCRCErrors, TxFCSErrors)
 	}, *p = hw_stats;
 	u64 *stats = (u64 *) &mac->stats;
 	unsigned int i;

 	for (i = 0; i < ARRAY_SIZE(hw_stats); i++) {
 		u32 val;

 		t1_tpi_read(mac->adapter, MACREG(mac, p->reg), &val);
 		stats[p->offset] += val;
 	}
 }

 /* No-op interrupt operation as this MAC does not support interrupts */
 static int mac_intr_op(struct cmac *mac)
 {
 	return 0;
 }

 /* Expect MAC address to be in network byte order. */
 static int mac_set_address(struct cmac *mac, u8 addr[6])
 {
 	u32 addr_lo, addr_hi;

 	addr_lo = addr[2];
 	addr_lo = (addr_lo << 8) | addr[3];
 	addr_lo = (addr_lo << 8) | addr[4];
 	addr_lo = (addr_lo << 8) | addr[5];

 	addr_hi = addr[0];
 	addr_hi = (addr_hi << 8) | addr[1];

 	t1_tpi_write(mac->adapter, MACREG(mac, REG_MACADDR_LOW), addr_lo);
 	t1_tpi_write(mac->adapter, MACREG(mac, REG_MACADDR_HIGH), addr_hi);
 	return 0;
 }

 static int mac_get_address(struct cmac *mac, u8 addr[6])
 {
 	u32 addr_lo, addr_hi;

 	t1_tpi_read(mac->adapter, MACREG(mac, REG_MACADDR_LOW), &addr_lo);
 	t1_tpi_read(mac->adapter, MACREG(mac, REG_MACADDR_HIGH), &addr_hi);

 	addr[0] = (u8) (addr_hi >> 8);
 	addr[1] = (u8) addr_hi;
 	addr[2] = (u8) (addr_lo >> 24);
 	addr[3] = (u8) (addr_lo >> 16);
 	addr[4] = (u8) (addr_lo >> 8);
 	addr[5] = (u8) addr_lo;
 	return 0;
 }

 /* This is intended to reset a port, not the whole MAC */
 static int mac_reset(struct cmac *mac)
 {
 	return 0;
 }

 static int mac_set_rx_mode(struct cmac *mac, struct t1_rx_mode *rm)
 {
 	u32 val, new_mode;
 	adapter_t *adapter = mac->adapter;
 	u32 addr_lo, addr_hi;
 	u8 *addr;

 	t1_tpi_read(adapter, MACREG(mac, REG_RX_FILTER), &val);
 	new_mode = val & ~7;
 	if (!t1_rx_mode_promisc(rm) && mac->instance->version > 0)
 		new_mode |= 1;     /* only set if version > 0 due to erratum */
 	if (!t1_rx_mode_promisc(rm) && !t1_rx_mode_allmulti(rm)
 	     && t1_rx_mode_mc_cnt(rm) <= 1)
 		new_mode |= 2;
 	if (new_mode != val)
 		t1_tpi_write(adapter, MACREG(mac, REG_RX_FILTER), new_mode);
 	switch (t1_rx_mode_mc_cnt(rm)) {
 	case 0:
 		t1_tpi_write(adapter, MACREG(mac, REG_MC_ADDR_LOW), 0);
 		t1_tpi_write(adapter, MACREG(mac, REG_MC_ADDR_HIGH), 0);
 		break;
 	case 1:
 		addr = t1_get_next_mcaddr(rm);
 		addr_lo = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) |
 			addr[5];
 		addr_hi = (addr[0] << 8) | addr[1];
 		t1_tpi_write(adapter, MACREG(mac, REG_MC_ADDR_LOW), addr_lo);
 		t1_tpi_write(adapter, MACREG(mac, REG_MC_ADDR_HIGH), addr_hi);
 		break;
 	default:
 		break;
 	}
 	return 0;
 }

 static int mac_set_mtu(struct cmac *mac, int mtu)
 {
 	/* MAX_FRAME_SIZE inludes header + FCS, mtu doesn't */
 	if (mtu > (MAX_FRAME_SIZE - 14 - 4))
 		return -EINVAL;
 	t1_tpi_write(mac->adapter, MACREG(mac, REG_MAX_FRAME_SIZE),
 		     mtu + 14 + 4);
 	return 0;
 }

 static int mac_set_speed_duplex_fc(struct cmac *mac, int speed, int duplex,
 				   int fc)
 {
 	u32 val;

 	if (speed >= 0 && speed != SPEED_100 && speed != SPEED_1000)
 		return -1;
 	if (duplex >= 0 && duplex != DUPLEX_FULL)
 		return -1;

 	if (speed >= 0) {
 		val = speed == SPEED_100 ? 1 : 2;
 		t1_tpi_write(mac->adapter, MACREG(mac, REG_RGMII_SPEED), val);
 	}

 	t1_tpi_read(mac->adapter, MACREG(mac, REG_FC_ENABLE), &val);
 	val &= ~3;
 	if (fc & PAUSE_RX)
 		val |= 1;
 	if (fc & PAUSE_TX)
 		val |= 2;
 	t1_tpi_write(mac->adapter, MACREG(mac, REG_FC_ENABLE), val);
 	return 0;
 }

 static int mac_get_speed_duplex_fc(struct cmac *mac, int *speed, int *duplex,
 				   int *fc)
 {
 	u32 val;

 	if (duplex)
 		*duplex = DUPLEX_FULL;
 	if (speed) {
 		t1_tpi_read(mac->adapter, MACREG(mac, REG_RGMII_SPEED),
 			 &val);
 		*speed = (val & 2) ? SPEED_1000 : SPEED_100;
 	}
 	if (fc) {
 		t1_tpi_read(mac->adapter, MACREG(mac, REG_FC_ENABLE), &val);
 		*fc = 0;
 		if (val & 1)
 			*fc |= PAUSE_RX;
 		if (val & 2)
 			*fc |= PAUSE_TX;
 	}
 	return 0;
 }

 static void enable_port(struct cmac *mac)
 {
 	u32 val;
 	u32 index = mac->instance->index;
 	adapter_t *adapter = mac->adapter;

 	t1_tpi_read(adapter, MACREG(mac, REG_DIVERSE_CONFIG), &val);
 	val |= DIVERSE_CONFIG_CRC_ADD | DIVERSE_CONFIG_PAD_ENABLE;
 	t1_tpi_write(adapter, MACREG(mac, REG_DIVERSE_CONFIG), val);
 	if (mac->instance->version > 0)
 		t1_tpi_write(adapter, MACREG(mac, REG_RX_FILTER), 3);
 	else /* Don't enable unicast address filtering due to IXF1010 bug */
 		t1_tpi_write(adapter, MACREG(mac, REG_RX_FILTER), 2);

 	t1_tpi_read(adapter, REG_RX_ERR_DROP, &val);
 	val |= (1 << index);
 	t1_tpi_write(adapter, REG_RX_ERR_DROP, val);

 	/*
 	 * Clear the port RMON registers by adding their current values to the
 	 * cumulatice port stats and then clearing the stats.  Really.
 	 */
 	port_stats_update(mac);
 	memset(&mac->stats, 0, sizeof(struct cmac_statistics));
 	mac->instance->ticks = 0;

 	t1_tpi_read(adapter, REG_PORT_ENABLE, &val);
 	val |= (1 << index);
 	t1_tpi_write(adapter, REG_PORT_ENABLE, val);

 	index <<= 2;
 	if (is_T2(adapter)) {
 		/* T204: set the Fifo water level & threshold */
 		t1_tpi_write(adapter, RX_FIFO_HIGH_WATERMARK_BASE + index, 0x740);
 		t1_tpi_write(adapter, RX_FIFO_LOW_WATERMARK_BASE + index, 0x730);
 		t1_tpi_write(adapter, TX_FIFO_HIGH_WATERMARK_BASE + index, 0x600);
 		t1_tpi_write(adapter, TX_FIFO_LOW_WATERMARK_BASE + index, 0x1d0);
 		t1_tpi_write(adapter, TX_FIFO_XFER_THRES_BASE + index, 0x1100);
 	} else {
 	/*
 	 * Set the TX Fifo Threshold to 0x400 instead of 0x100 to work around
 	 * Underrun problem. Intel has blessed this solution.
 	 */
 		t1_tpi_write(adapter, TX_FIFO_XFER_THRES_BASE + index, 0x400);
 	}
 }

 /* IXF1010 ports do not have separate enables for TX and RX */
 static int mac_enable(struct cmac *mac, int which)
 {
 	if (which & (MAC_DIRECTION_RX | MAC_DIRECTION_TX))
 		enable_port(mac);
 	return 0;
 }

 static int mac_disable(struct cmac *mac, int which)
 {
 	if (which & (MAC_DIRECTION_RX | MAC_DIRECTION_TX))
 		disable_port(mac);
 	return 0;
 }

 #define RMON_UPDATE(mac, name, stat_name) \
 	t1_tpi_read((mac)->adapter, MACREG(mac, REG_##name), &val); \
 	(mac)->stats.stat_name += val;

 /*
  * This function is called periodically to accumulate the current values of the
  * RMON counters into the port statistics.  Since the counters are only 32 bits
  * some of them can overflow in less than a minute at GigE speeds, so this
  * function should be called every 30 seconds or so.
  *
  * To cut down on reading costs we update only the octet counters at each tick
  * and do a full update at major ticks, which can be every 30 minutes or more.
  */
 static const struct cmac_statistics *mac_update_statistics(struct cmac *mac,
 							   int flag)
 {
 	if (flag == MAC_STATS_UPDATE_FULL ||
 	    MAJOR_UPDATE_TICKS <= mac->instance->ticks) {
 		port_stats_update(mac);
 		mac->instance->ticks = 0;
 	} else {
 		u32 val;

 		RMON_UPDATE(mac, RxOctetsTotalOK, RxOctetsOK);
 		RMON_UPDATE(mac, TxOctetsTotalOK, TxOctetsOK);
 		mac->instance->ticks++;
 	}
 	return &mac->stats;
 }

 static void mac_destroy(struct cmac *mac)
 {
 	kfree(mac);
 }

 static struct cmac_ops ixf1010_ops = {
 	.destroy                  = mac_destroy,
 	.reset                    = mac_reset,
 	.interrupt_enable         = mac_intr_op,
 	.interrupt_disable        = mac_intr_op,
 	.interrupt_clear          = mac_intr_op,
 	.enable                   = mac_enable,
 	.disable                  = mac_disable,
 	.set_mtu                  = mac_set_mtu,
 	.set_rx_mode              = mac_set_rx_mode,
 	.set_speed_duplex_fc      = mac_set_speed_duplex_fc,
 	.get_speed_duplex_fc      = mac_get_speed_duplex_fc,
 	.statistics_update        = mac_update_statistics,
 	.macaddress_get           = mac_get_address,
 	.macaddress_set           = mac_set_address,
 };

 static int ixf1010_mac_reset(adapter_t *adapter)
 {
 	u32 val;

 	t1_tpi_read(adapter, A_ELMER0_GPO, &val);
 	if ((val & 1) != 0) {
 		val &= ~1;
 		t1_tpi_write(adapter, A_ELMER0_GPO, val);
 		udelay(2);
 	}
 	val |= 1;
 	t1_tpi_write(adapter, A_ELMER0_GPO, val);
 	udelay(2);

 	t1_tpi_write(adapter, REG_PORT_ENABLE, 0);
 	return 0;
 }

 static struct cmac *ixf1010_mac_create(adapter_t *adapter, int index)
 {
 	struct cmac *mac;
 	u32 val;

 	if (index > 9)
 		return NULL;

 	mac = kzalloc(sizeof(*mac) + sizeof(cmac_instance), GFP_KERNEL);
 	if (!mac)
 		return NULL;

 	mac->ops = &ixf1010_ops;
 	mac->instance = (cmac_instance *)(mac + 1);

 	mac->instance->mac_base = MACREG_BASE + (index * 0x200);
 	mac->instance->index    = index;
 	mac->adapter  = adapter;
 	mac->instance->ticks    = 0;

 	t1_tpi_read(adapter, REG_JTAG_ID, &val);
 	mac->instance->version = val >> 28;
 	return mac;
 }

 struct gmac t1_ixf1010_ops = {
 	STATS_TICK_SECS,
 	ixf1010_mac_create,
 	ixf1010_mac_reset
 };
	/* $Date: 2005/11/12 02:13:49 $ $RCSfile: ixf1010.c,v $ $Revision: 1.36 $ */
	#include "gmac.h"
	#include "elmer0.h"

	/* Update fast changing statistics every 15 seconds */
	#define STATS_TICK_SECS 15
	/* 30 minutes for full statistics update */
	#define MAJOR_UPDATE_TICKS (1800 / STATS_TICK_SECS)

	/*
	* The IXF1010 can handle frames up to 16383 bytes but it's optimized for
	* frames up to 9831 (0x2667) bytes, so we limit jumbo frame size to this.
	* This length includes ethernet header and FCS.
	*/
	#define MAX_FRAME_SIZE 0x2667

	/* MAC registers */
	enum {
	/* Per-port registers */
	REG_MACADDR_LOW = 0,
	REG_MACADDR_HIGH = 0x4,
	REG_FDFC_TYPE = 0xC,
	REG_FC_TX_TIMER_VALUE = 0x1c,
	REG_IPG_RX_TIME1 = 0x28,
	REG_IPG_RX_TIME2 = 0x2c,
	REG_IPG_TX_TIME = 0x30,
	REG_PAUSE_THRES = 0x38,
	REG_MAX_FRAME_SIZE = 0x3c,
	REG_RGMII_SPEED = 0x40,
	REG_FC_ENABLE = 0x48,
	REG_DISCARD_CTRL_FRAMES = 0x54,
	REG_DIVERSE_CONFIG = 0x60,
	REG_RX_FILTER = 0x64,
	REG_MC_ADDR_LOW = 0x68,
	REG_MC_ADDR_HIGH = 0x6c,

	REG_RX_OCTETS_OK = 0x80,
	REG_RX_OCTETS_BAD = 0x84,
	REG_RX_UC_PKTS = 0x88,
	REG_RX_MC_PKTS = 0x8c,
	REG_RX_BC_PKTS = 0x90,
	REG_RX_FCS_ERR = 0xb0,
	REG_RX_TAGGED = 0xb4,
	REG_RX_DATA_ERR = 0xb8,
	REG_RX_ALIGN_ERR = 0xbc,
	REG_RX_LONG_ERR = 0xc0,
	REG_RX_JABBER_ERR = 0xc4,
	REG_RX_PAUSE_FRAMES = 0xc8,
	REG_RX_UNKNOWN_CTRL_FRAMES = 0xcc,
	REG_RX_VERY_LONG_ERR = 0xd0,
	REG_RX_RUNT_ERR = 0xd4,
	REG_RX_SHORT_ERR = 0xd8,
	REG_RX_SYMBOL_ERR = 0xe4,

	REG_TX_OCTETS_OK = 0x100,
	REG_TX_OCTETS_BAD = 0x104,
	REG_TX_UC_PKTS = 0x108,
	REG_TX_MC_PKTS = 0x10c,
	REG_TX_BC_PKTS = 0x110,
	REG_TX_EXCESSIVE_LEN_DROP = 0x14c,
	REG_TX_UNDERRUN = 0x150,
	REG_TX_TAGGED = 0x154,
	REG_TX_PAUSE_FRAMES = 0x15C,

	/* Global registers */
	REG_PORT_ENABLE = 0x1400,

	REG_JTAG_ID = 0x1430,

	RX_FIFO_HIGH_WATERMARK_BASE = 0x1600,
	RX_FIFO_LOW_WATERMARK_BASE = 0x1628,
	RX_FIFO_FRAMES_REMOVED_BASE = 0x1650,

	REG_RX_ERR_DROP = 0x167c,
	REG_RX_FIFO_OVERFLOW_EVENT = 0x1680,

	TX_FIFO_HIGH_WATERMARK_BASE = 0x1800,
	TX_FIFO_LOW_WATERMARK_BASE = 0x1828,
	TX_FIFO_XFER_THRES_BASE = 0x1850,

	REG_TX_FIFO_OVERFLOW_EVENT = 0x1878,
	REG_TX_FIFO_OOS_EVENT = 0x1884,

	TX_FIFO_FRAMES_REMOVED_BASE = 0x1888,

	REG_SPI_RX_BURST = 0x1c00,
	REG_SPI_RX_TRAINING = 0x1c04,
	REG_SPI_RX_CALENDAR = 0x1c08,
	REG_SPI_TX_SYNC = 0x1c0c
	};

	enum { /* RMON registers */
	REG_RxOctetsTotalOK = 0x80,
	REG_RxOctetsBad = 0x84,
	REG_RxUCPkts = 0x88,
	REG_RxMCPkts = 0x8c,
	REG_RxBCPkts = 0x90,
	REG_RxJumboPkts = 0xac,
	REG_RxFCSErrors = 0xb0,
	REG_RxDataErrors = 0xb8,
	REG_RxAlignErrors = 0xbc,
	REG_RxLongErrors = 0xc0,
	REG_RxJabberErrors = 0xc4,
	REG_RxPauseMacControlCounter = 0xc8,
	REG_RxVeryLongErrors = 0xd0,
	REG_RxRuntErrors = 0xd4,
	REG_RxShortErrors = 0xd8,
	REG_RxSequenceErrors = 0xe0,
	REG_RxSymbolErrors = 0xe4,

	REG_TxOctetsTotalOK = 0x100,
	REG_TxOctetsBad = 0x104,
	REG_TxUCPkts = 0x108,
	REG_TxMCPkts = 0x10c,
	REG_TxBCPkts = 0x110,
	REG_TxJumboPkts = 0x12C,
	REG_TxTotalCollisions = 0x134,
	REG_TxExcessiveLengthDrop = 0x14c,
	REG_TxUnderrun = 0x150,
	REG_TxCRCErrors = 0x158,
	REG_TxPauseFrames = 0x15c
	};

	enum {
	DIVERSE_CONFIG_PAD_ENABLE = 0x80,
	DIVERSE_CONFIG_CRC_ADD = 0x40
	};

	#define MACREG_BASE 0
	#define MACREG(mac, mac_reg) ((mac)->instance->mac_base + (mac_reg))

	struct _cmac_instance {
	u32 mac_base;
	u32 index;
	u32 version;
	u32 ticks;
	};

	static void disable_port(struct cmac *mac)
	{
	u32 val;

	t1_tpi_read(mac->adapter, REG_PORT_ENABLE, &val);
	val &= ~(1 << mac->instance->index);
	t1_tpi_write(mac->adapter, REG_PORT_ENABLE, val);
	}

	/*
	* Read the current values of the RMON counters and add them to the cumulative
	* port statistics. The HW RMON counters are cleared by this operation.
	*/
	static void port_stats_update(struct cmac *mac)
	{
	static struct {
	unsigned int reg;
	unsigned int offset;
	} hw_stats[] = {

	#define HW_STAT(name, stat_name) \
	{ REG_##name, \
	(&((struct cmac_statistics )NULL)->stat_name) - (u64 )NULL }

	/* Rx stats */
	HW_STAT(RxOctetsTotalOK, RxOctetsOK),
	HW_STAT(RxOctetsBad, RxOctetsBad),
	HW_STAT(RxUCPkts, RxUnicastFramesOK),
	HW_STAT(RxMCPkts, RxMulticastFramesOK),
	HW_STAT(RxBCPkts, RxBroadcastFramesOK),
	HW_STAT(RxJumboPkts, RxJumboFramesOK),
	HW_STAT(RxFCSErrors, RxFCSErrors),
	HW_STAT(RxAlignErrors, RxAlignErrors),
	HW_STAT(RxLongErrors, RxFrameTooLongErrors),
	HW_STAT(RxVeryLongErrors, RxFrameTooLongErrors),
	HW_STAT(RxPauseMacControlCounter, RxPauseFrames),
	HW_STAT(RxDataErrors, RxDataErrors),
	HW_STAT(RxJabberErrors, RxJabberErrors),
	HW_STAT(RxRuntErrors, RxRuntErrors),
	HW_STAT(RxShortErrors, RxRuntErrors),
	HW_STAT(RxSequenceErrors, RxSequenceErrors),
	HW_STAT(RxSymbolErrors, RxSymbolErrors),

	/* Tx stats (skip collision stats as we are full-duplex only) */
	HW_STAT(TxOctetsTotalOK, TxOctetsOK),
	HW_STAT(TxOctetsBad, TxOctetsBad),
	HW_STAT(TxUCPkts, TxUnicastFramesOK),
	HW_STAT(TxMCPkts, TxMulticastFramesOK),
	HW_STAT(TxBCPkts, TxBroadcastFramesOK),
	HW_STAT(TxJumboPkts, TxJumboFramesOK),
	HW_STAT(TxPauseFrames, TxPauseFrames),
	HW_STAT(TxExcessiveLengthDrop, TxLengthErrors),
	HW_STAT(TxUnderrun, TxUnderrun),
	HW_STAT(TxCRCErrors, TxFCSErrors)
	}, *p = hw_stats;
	u64 stats = (u64 ) &mac->stats;
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(hw_stats); i++) {
	u32 val;

	t1_tpi_read(mac->adapter, MACREG(mac, p->reg), &val);
	stats[p->offset] += val;
	}
	}

	/* No-op interrupt operation as this MAC does not support interrupts */
	static int mac_intr_op(struct cmac *mac)
	{
	return 0;
	}

	/* Expect MAC address to be in network byte order. */
	static int mac_set_address(struct cmac *mac, u8 addr[6])
	{
	u32 addr_lo, addr_hi;

	addr_lo = addr[2];
	addr_lo = (addr_lo << 8) \| addr[3];
	addr_lo = (addr_lo << 8) \| addr[4];
	addr_lo = (addr_lo << 8) \| addr[5];

	addr_hi = addr[0];
	addr_hi = (addr_hi << 8) \| addr[1];

	t1_tpi_write(mac->adapter, MACREG(mac, REG_MACADDR_LOW), addr_lo);
	t1_tpi_write(mac->adapter, MACREG(mac, REG_MACADDR_HIGH), addr_hi);
	return 0;
	}

	static int mac_get_address(struct cmac *mac, u8 addr[6])
	{
	u32 addr_lo, addr_hi;

	t1_tpi_read(mac->adapter, MACREG(mac, REG_MACADDR_LOW), &addr_lo);
	t1_tpi_read(mac->adapter, MACREG(mac, REG_MACADDR_HIGH), &addr_hi);

	addr[0] = (u8) (addr_hi >> 8);
	addr[1] = (u8) addr_hi;
	addr[2] = (u8) (addr_lo >> 24);
	addr[3] = (u8) (addr_lo >> 16);
	addr[4] = (u8) (addr_lo >> 8);
	addr[5] = (u8) addr_lo;
	return 0;
	}

	/* This is intended to reset a port, not the whole MAC */
	static int mac_reset(struct cmac *mac)
	{
	return 0;
	}

	static int mac_set_rx_mode(struct cmac mac, struct t1_rx_mode rm)
	{
	u32 val, new_mode;
	adapter_t *adapter = mac->adapter;
	u32 addr_lo, addr_hi;
	u8 *addr;

	t1_tpi_read(adapter, MACREG(mac, REG_RX_FILTER), &val);
	new_mode = val & ~7;
	if (!t1_rx_mode_promisc(rm) && mac->instance->version > 0)
	new_mode \|= 1; /* only set if version > 0 due to erratum */
	if (!t1_rx_mode_promisc(rm) && !t1_rx_mode_allmulti(rm)
	&& t1_rx_mode_mc_cnt(rm) <= 1)
	new_mode \|= 2;
	if (new_mode != val)
	t1_tpi_write(adapter, MACREG(mac, REG_RX_FILTER), new_mode);
	switch (t1_rx_mode_mc_cnt(rm)) {
	case 0:
	t1_tpi_write(adapter, MACREG(mac, REG_MC_ADDR_LOW), 0);
	t1_tpi_write(adapter, MACREG(mac, REG_MC_ADDR_HIGH), 0);
	break;
	case 1:
	addr = t1_get_next_mcaddr(rm);
	addr_lo = (addr[2] << 24) \| (addr[3] << 16) \| (addr[4] << 8) \|
	addr[5];
	addr_hi = (addr[0] << 8) \| addr[1];
	t1_tpi_write(adapter, MACREG(mac, REG_MC_ADDR_LOW), addr_lo);
	t1_tpi_write(adapter, MACREG(mac, REG_MC_ADDR_HIGH), addr_hi);
	break;
	default:
	break;
	}
	return 0;
	}

	static int mac_set_mtu(struct cmac *mac, int mtu)
	{
	/* MAX_FRAME_SIZE inludes header + FCS, mtu doesn't */
	if (mtu > (MAX_FRAME_SIZE - 14 - 4))
	return -EINVAL;
	t1_tpi_write(mac->adapter, MACREG(mac, REG_MAX_FRAME_SIZE),
	mtu + 14 + 4);
	return 0;
	}

	static int mac_set_speed_duplex_fc(struct cmac *mac, int speed, int duplex,
	int fc)
	{
	u32 val;

	if (speed >= 0 && speed != SPEED_100 && speed != SPEED_1000)
	return -1;
	if (duplex >= 0 && duplex != DUPLEX_FULL)
	return -1;

	if (speed >= 0) {
	val = speed == SPEED_100 ? 1 : 2;
	t1_tpi_write(mac->adapter, MACREG(mac, REG_RGMII_SPEED), val);
	}

	t1_tpi_read(mac->adapter, MACREG(mac, REG_FC_ENABLE), &val);
	val &= ~3;
	if (fc & PAUSE_RX)
	val \|= 1;
	if (fc & PAUSE_TX)
	val \|= 2;
	t1_tpi_write(mac->adapter, MACREG(mac, REG_FC_ENABLE), val);
	return 0;
	}

	static int mac_get_speed_duplex_fc(struct cmac mac, int speed, int *duplex,
	int *fc)
	{
	u32 val;

	if (duplex)
	*duplex = DUPLEX_FULL;
	if (speed) {
	t1_tpi_read(mac->adapter, MACREG(mac, REG_RGMII_SPEED),
	&val);
	*speed = (val & 2) ? SPEED_1000 : SPEED_100;
	}
	if (fc) {
	t1_tpi_read(mac->adapter, MACREG(mac, REG_FC_ENABLE), &val);
	*fc = 0;
	if (val & 1)
	*fc \|= PAUSE_RX;
	if (val & 2)
	*fc \|= PAUSE_TX;
	}
	return 0;
	}

	static void enable_port(struct cmac *mac)
	{
	u32 val;
	u32 index = mac->instance->index;
	adapter_t *adapter = mac->adapter;

	t1_tpi_read(adapter, MACREG(mac, REG_DIVERSE_CONFIG), &val);
	val \|= DIVERSE_CONFIG_CRC_ADD \| DIVERSE_CONFIG_PAD_ENABLE;
	t1_tpi_write(adapter, MACREG(mac, REG_DIVERSE_CONFIG), val);
	if (mac->instance->version > 0)
	t1_tpi_write(adapter, MACREG(mac, REG_RX_FILTER), 3);
	else /* Don't enable unicast address filtering due to IXF1010 bug */
	t1_tpi_write(adapter, MACREG(mac, REG_RX_FILTER), 2);

	t1_tpi_read(adapter, REG_RX_ERR_DROP, &val);
	val \|= (1 << index);
	t1_tpi_write(adapter, REG_RX_ERR_DROP, val);

	/*
	* Clear the port RMON registers by adding their current values to the
	* cumulatice port stats and then clearing the stats. Really.
	*/
	port_stats_update(mac);
	memset(&mac->stats, 0, sizeof(struct cmac_statistics));
	mac->instance->ticks = 0;

	t1_tpi_read(adapter, REG_PORT_ENABLE, &val);
	val \|= (1 << index);
	t1_tpi_write(adapter, REG_PORT_ENABLE, val);

	index <<= 2;
	if (is_T2(adapter)) {
	/* T204: set the Fifo water level & threshold */
	t1_tpi_write(adapter, RX_FIFO_HIGH_WATERMARK_BASE + index, 0x740);
	t1_tpi_write(adapter, RX_FIFO_LOW_WATERMARK_BASE + index, 0x730);
	t1_tpi_write(adapter, TX_FIFO_HIGH_WATERMARK_BASE + index, 0x600);
	t1_tpi_write(adapter, TX_FIFO_LOW_WATERMARK_BASE + index, 0x1d0);
	t1_tpi_write(adapter, TX_FIFO_XFER_THRES_BASE + index, 0x1100);
	} else {
	/*
	* Set the TX Fifo Threshold to 0x400 instead of 0x100 to work around
	* Underrun problem. Intel has blessed this solution.
	*/
	t1_tpi_write(adapter, TX_FIFO_XFER_THRES_BASE + index, 0x400);
	}
	}

	/* IXF1010 ports do not have separate enables for TX and RX */
	static int mac_enable(struct cmac *mac, int which)
	{
	if (which & (MAC_DIRECTION_RX \| MAC_DIRECTION_TX))
	enable_port(mac);
	return 0;
	}

	static int mac_disable(struct cmac *mac, int which)
	{
	if (which & (MAC_DIRECTION_RX \| MAC_DIRECTION_TX))
	disable_port(mac);
	return 0;
	}

	#define RMON_UPDATE(mac, name, stat_name) \
	t1_tpi_read((mac)->adapter, MACREG(mac, REG_##name), &val); \
	(mac)->stats.stat_name += val;

	/*
	* This function is called periodically to accumulate the current values of the
	* RMON counters into the port statistics. Since the counters are only 32 bits
	* some of them can overflow in less than a minute at GigE speeds, so this
	* function should be called every 30 seconds or so.
	*
	* To cut down on reading costs we update only the octet counters at each tick
	* and do a full update at major ticks, which can be every 30 minutes or more.
	*/
	static const struct cmac_statistics mac_update_statistics(struct cmac mac,
	int flag)
	{
	if (flag == MAC_STATS_UPDATE_FULL \|\|
	MAJOR_UPDATE_TICKS <= mac->instance->ticks) {
	port_stats_update(mac);
	mac->instance->ticks = 0;
	} else {
	u32 val;

	RMON_UPDATE(mac, RxOctetsTotalOK, RxOctetsOK);
	RMON_UPDATE(mac, TxOctetsTotalOK, TxOctetsOK);
	mac->instance->ticks++;
	}
	return &mac->stats;
	}

	static void mac_destroy(struct cmac *mac)
	{
	kfree(mac);
	}

	static struct cmac_ops ixf1010_ops = {
	.destroy = mac_destroy,
	.reset = mac_reset,
	.interrupt_enable = mac_intr_op,
	.interrupt_disable = mac_intr_op,
	.interrupt_clear = mac_intr_op,
	.enable = mac_enable,
	.disable = mac_disable,
	.set_mtu = mac_set_mtu,
	.set_rx_mode = mac_set_rx_mode,
	.set_speed_duplex_fc = mac_set_speed_duplex_fc,
	.get_speed_duplex_fc = mac_get_speed_duplex_fc,
	.statistics_update = mac_update_statistics,
	.macaddress_get = mac_get_address,
	.macaddress_set = mac_set_address,
	};

	static int ixf1010_mac_reset(adapter_t *adapter)
	{
	u32 val;

	t1_tpi_read(adapter, A_ELMER0_GPO, &val);
	if ((val & 1) != 0) {
	val &= ~1;
	t1_tpi_write(adapter, A_ELMER0_GPO, val);
	udelay(2);
	}
	val \|= 1;
	t1_tpi_write(adapter, A_ELMER0_GPO, val);
	udelay(2);

	t1_tpi_write(adapter, REG_PORT_ENABLE, 0);
	return 0;
	}

	static struct cmac ixf1010_mac_create(adapter_t adapter, int index)
	{
	struct cmac *mac;
	u32 val;

	if (index > 9)
	return NULL;

	mac = kzalloc(sizeof(*mac) + sizeof(cmac_instance), GFP_KERNEL);
	if (!mac)
	return NULL;

	mac->ops = &ixf1010_ops;
	mac->instance = (cmac_instance *)(mac + 1);

	mac->instance->mac_base = MACREG_BASE + (index * 0x200);
	mac->instance->index = index;
	mac->adapter = adapter;
	mac->instance->ticks = 0;

	t1_tpi_read(adapter, REG_JTAG_ID, &val);
	mac->instance->version = val >> 28;
	return mac;
	}

	struct gmac t1_ixf1010_ops = {
	STATS_TICK_SECS,
	ixf1010_mac_create,
	ixf1010_mac_reset
	};