Commit 07d3f51f authored by Francois Romieu's avatar Francois Romieu Committed by Jeff Garzik
Browse files

r8169: cleanup 



No functionnal change:
- trim the old history log
- whitespace/indent/case police
- unsigned int where signedness does not matter
- removal of obsolete assert
- needless cast from void * (dev_instance)
- remove dead code once related to power management
- use netdev_alloc_skb.

Signed-off-by: default avatarFrancois Romieu <romieu@fr.zoreil.com>
Cc: Stephen Hemminger <shemminger@linux-foundation.org>
Cc: Edward Hsu <edward_hsu@realtek.com.tw>
parent 901dda2b

drivers/net/r8169.c

+145 −202
Original line number Diff line number Diff line 
/*

=========================================================================

 r8169.c: A RealTek RTL-8169 Gigabit Ethernet driver for Linux kernel 2.4.x.

 --------------------------------------------------------------------



 History:

 Feb  4 2002	- created initially by ShuChen <shuchen@realtek.com.tw>.

 May 20 2002	- Add link status force-mode and TBI mode support.

	2004	- Massive updates. See kernel SCM system for details.

=========================================================================

VERSION 1.1	<2002/10/4>



	The bit4:0 of MII register 4 is called "selector field", and have to be

	00001b to indicate support of IEEE std 802.3 during NWay process of

	exchanging Link Code Word (FLP).



VERSION 1.2	<2002/11/30>



	- Large style cleanup

	- Use ether_crc in stock kernel (linux/crc32.h)

	- Copy mc_filter setup code from 8139cp

	  (includes an optimization, and avoids set_bit use)



VERSION 1.6LK	<2004/04/14>



	- Merge of Realtek's version 1.6

	- Conversion to DMA API

	- Suspend/resume

	- Endianness

	- Misc Rx/Tx bugs



VERSION 2.2LK	<2005/01/25>



	- RX csum, TX csum/SG, TSO

	- VLAN

	- baby (< 7200) Jumbo frames support

	- Merge of Realtek's version 2.2 (new phy)

 * r8169.c: RealTek 8169/8168/8101 ethernet driver.

 *

 * Copyright (c) 2002 ShuChen <shuchen@realtek.com.tw>

 * Copyright (c) 2003 - 2007 Francois Romieu <romieu@fr.zoreil.com>

 * Copyright (c) a lot of people too. Please respect their work.

 *

 * See MAINTAINERS file for support contact information.

 */



#include <linux/module.h>
@@ -209,7 +180,7 @@ static struct { 
	u32 msg_enable;

} debug = { -1 };



enum RTL8169_registers {

enum rtl_registers {

	MAC0		= 0,	/* Ethernet hardware address. */

	MAR0		= 8,	/* Multicast filter. */

	CounterAddrLow		= 0x10,
@@ -222,11 +193,11 @@ enum RTL8169_registers { 
	ERSR		= 0x36,

	ChipCmd		= 0x37,

	TxPoll		= 0x38,

	IntrMask = 0x3C,

	IntrStatus = 0x3E,

	IntrMask	= 0x3c,

	IntrStatus	= 0x3e,

	TxConfig	= 0x40,

	RxConfig	= 0x44,

	RxMissed = 0x4C,

	RxMissed	= 0x4c,

	Cfg9346		= 0x50,

	Config0		= 0x51,

	Config1		= 0x52,
@@ -234,37 +205,37 @@ enum RTL8169_registers { 
	Config3		= 0x54,

	Config4		= 0x55,

	Config5		= 0x56,

	MultiIntr = 0x5C,

	MultiIntr	= 0x5c,

	PHYAR		= 0x60,

	TBICSR		= 0x64,

	TBI_ANAR	= 0x68,

	TBI_LPAR = 0x6A,

	PHYstatus = 0x6C,

	RxMaxSize = 0xDA,

	CPlusCmd = 0xE0,

	IntrMitigate = 0xE2,

	RxDescAddrLow = 0xE4,

	RxDescAddrHigh = 0xE8,

	EarlyTxThres = 0xEC,

	FuncEvent = 0xF0,

	FuncEventMask = 0xF4,

	FuncPresetState = 0xF8,

	FuncForceEvent = 0xFC,

	TBI_LPAR	= 0x6a,

	PHYstatus	= 0x6c,

	RxMaxSize	= 0xda,

	CPlusCmd	= 0xe0,

	IntrMitigate	= 0xe2,

	RxDescAddrLow	= 0xe4,

	RxDescAddrHigh	= 0xe8,

	EarlyTxThres	= 0xec,

	FuncEvent	= 0xf0,

	FuncEventMask	= 0xf4,

	FuncPresetState	= 0xf8,

	FuncForceEvent	= 0xfc,

};



enum RTL8169_register_content {

enum rtl_register_content {

	/* InterruptStatusBits */

	SYSErr		= 0x8000,

	PCSTimeout	= 0x4000,

	SWInt		= 0x0100,

	TxDescUnavail = 0x80,

	RxFIFOOver = 0x40,

	LinkChg = 0x20,

	RxOverflow = 0x10,

	TxErr = 0x08,

	TxOK = 0x04,

	RxErr = 0x02,

	RxOK = 0x01,

	TxDescUnavail	= 0x0080,

	RxFIFOOver	= 0x0040,

	LinkChg		= 0x0020,

	RxOverflow	= 0x0010,

	TxErr		= 0x0008,

	TxOK		= 0x0004,

	RxErr		= 0x0002,

	RxOK		= 0x0001,



	/* RxStatusDesc */

	RxFOVF	= (1 << 23),
@@ -281,7 +252,7 @@ enum RTL8169_register_content { 


	/* Cfg9346Bits */

	Cfg9346_Lock	= 0x00,

	Cfg9346_Unlock = 0xC0,

	Cfg9346_Unlock	= 0xc0,



	/* rx_mode_bits */

	AcceptErr	= 0x20,
@@ -353,7 +324,7 @@ enum RTL8169_register_content { 
	CounterDump	= 0x8,

};



enum _DescStatusBit {

enum desc_status_bit {

	DescOwn		= (1 << 31), /* Descriptor is owned by NIC */

	RingEnd		= (1 << 30), /* End of descriptor ring */

	FirstFrag	= (1 << 29), /* First segment of a packet */
@@ -478,28 +449,34 @@ static int rtl8169_poll(struct net_device *dev, int *budget); 
static const unsigned int rtl8169_rx_config =

	(RX_FIFO_THRESH << RxCfgFIFOShift) | (RX_DMA_BURST << RxCfgDMAShift);



static void mdio_write(void __iomem *ioaddr, int RegAddr, int value)

static void mdio_write(void __iomem *ioaddr, int reg_addr, int value)

{

	int i;



	RTL_W32(PHYAR, 0x80000000 | (RegAddr & 0xFF) << 16 | value);

	RTL_W32(PHYAR, 0x80000000 | (reg_addr & 0xFF) << 16 | value);



	for (i = 20; i > 0; i--) {

		/* Check if the RTL8169 has completed writing to the specified MII register */

		/*

		 * Check if the RTL8169 has completed writing to the specified

		 * MII register.

		 */

		if (!(RTL_R32(PHYAR) & 0x80000000))

			break;

		udelay(25);

	}

}



static int mdio_read(void __iomem *ioaddr, int RegAddr)

static int mdio_read(void __iomem *ioaddr, int reg_addr)

{

	int i, value = -1;



	RTL_W32(PHYAR, 0x0 | (RegAddr & 0xFF) << 16);

	RTL_W32(PHYAR, 0x0 | (reg_addr & 0xFF) << 16);



	for (i = 20; i > 0; i--) {

		/* Check if the RTL8169 has completed retrieving data from the specified MII register */

		/*

		 * Check if the RTL8169 has completed retrieving data from

		 * the specified MII register.

		 */

		if (RTL_R32(PHYAR) & 0x80000000) {

			value = (int) (RTL_R32(PHYAR) & 0xFFFF);

			break;
@@ -557,7 +534,8 @@ static void rtl8169_xmii_reset_enable(void __iomem *ioaddr) 
}



static void rtl8169_check_link_status(struct net_device *dev,

				      struct rtl8169_private *tp, void __iomem *ioaddr)

				      struct rtl8169_private *tp,

				      void __iomem *ioaddr)

{

	unsigned long flags;
@@ -613,7 +591,7 @@ static int rtl8169_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) 
{

	struct rtl8169_private *tp = netdev_priv(dev);

	void __iomem *ioaddr = tp->mmio_addr;

	int i;

	unsigned int i;

	static struct {

		u32 opt;

		u16 reg;
@@ -839,8 +817,7 @@ static int rtl8169_rx_vlan_skb(struct rtl8169_private *tp, struct RxDesc *desc, 
	int ret;



	if (tp->vlgrp && (opts2 & RxVlanTag)) {

		rtl8169_rx_hwaccel_skb(skb, tp->vlgrp,

				       swab16(opts2 & 0xffff));

		rtl8169_rx_hwaccel_skb(skb, tp->vlgrp, swab16(opts2 & 0xffff));

		ret = 0;

	} else

		ret = -1;
@@ -1061,7 +1038,6 @@ static void rtl8169_get_strings(struct net_device *dev, u32 stringset, u8 *data) 
	}

}





static const struct ethtool_ops rtl8169_ethtool_ops = {

	.get_drvinfo		= rtl8169_get_drvinfo,

	.get_regs_len		= rtl8169_get_regs_len,
@@ -1087,8 +1063,8 @@ static const struct ethtool_ops rtl8169_ethtool_ops = { 
	.get_perm_addr		= ethtool_op_get_perm_addr,

};



static void rtl8169_write_gmii_reg_bit(void __iomem *ioaddr, int reg, int bitnum,

				       int bitval)

static void rtl8169_write_gmii_reg_bit(void __iomem *ioaddr, int reg,

				       int bitnum, int bitval)

{

	int val;
@@ -1098,7 +1074,8 @@ static void rtl8169_write_gmii_reg_bit(void __iomem *ioaddr, int reg, int bitnum 
	mdio_write(ioaddr, reg, val & 0xffff);

}



static void rtl8169_get_mac_version(struct rtl8169_private *tp, void __iomem *ioaddr)

static void rtl8169_get_mac_version(struct rtl8169_private *tp,

				    void __iomem *ioaddr)

{

	/*

	 * The driver currently handles the 8168Bf and the 8168Be identically
@@ -1140,7 +1117,8 @@ static void rtl8169_print_mac_version(struct rtl8169_private *tp) 
	dprintk("mac_version = 0x%02x\n", tp->mac_version);

}



static void rtl8169_get_phy_version(struct rtl8169_private *tp, void __iomem *ioaddr)

static void rtl8169_get_phy_version(struct rtl8169_private *tp,

				    void __iomem *ioaddr)

{

	const struct {

		u16 mask;
@@ -1217,7 +1195,7 @@ static void rtl8169_hw_phy_config(struct net_device *dev) 
		  0xbf00 }	//w 0 15 0 bf00

		}

	}, *p = phy_magic;

	int i;

	unsigned int i;



	rtl8169_print_mac_version(tp);

	rtl8169_print_phy_version(tp);
@@ -1351,7 +1329,7 @@ static void rtl8169_phy_reset(struct net_device *dev, 
			      struct rtl8169_private *tp)

{

	void __iomem *ioaddr = tp->mmio_addr;

	int i;

	unsigned int i;



	tp->phy_reset_enable(ioaddr);

	for (i = 0; i < 100; i++) {
@@ -1463,8 +1441,8 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 
	struct rtl8169_private *tp;

	struct net_device *dev;

	void __iomem *ioaddr;

	unsigned int pm_cap;

	int i, rc;

	unsigned int i;

	int rc;



	if (netif_msg_drv(&debug)) {

		printk(KERN_INFO "%s Gigabit Ethernet driver %s loaded\n",
@@ -1497,20 +1475,6 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 
	if (rc < 0)

		goto err_out_disable_2;



	/* save power state before pci_enable_device overwrites it */

	pm_cap = pci_find_capability(pdev, PCI_CAP_ID_PM);

	if (pm_cap) {

		u16 pwr_command, acpi_idle_state;



		pci_read_config_word(pdev, pm_cap + PCI_PM_CTRL, &pwr_command);

		acpi_idle_state = pwr_command & PCI_PM_CTRL_STATE_MASK;

	} else {

		if (netif_msg_probe(tp)) {

			dev_err(&pdev->dev,

				"PowerManagement capability not found.\n");

		}

	}



	/* make sure PCI base addr 1 is MMIO */

	if (!(pci_resource_flags(pdev, region) & IORESOURCE_MEM)) {

		if (netif_msg_probe(tp)) {
@@ -1574,7 +1538,7 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 
	RTL_W8(ChipCmd, CmdReset);



	/* Check that the chip has finished the reset. */

	for (i = 100; i > 0; i--) {

	for (i = 0; i < 100; i++) {

		if ((RTL_R8(ChipCmd) & CmdReset) == 0)

			break;

		msleep_interruptible(1);
@@ -1706,15 +1670,11 @@ err_out_free_dev_1: 
	goto out;

}



static void __devexit

rtl8169_remove_one(struct pci_dev *pdev)

static void __devexit rtl8169_remove_one(struct pci_dev *pdev)

{

	struct net_device *dev = pci_get_drvdata(pdev);

	struct rtl8169_private *tp = netdev_priv(dev);



	assert(dev != NULL);

	assert(tp != NULL);



	flush_scheduled_work();



	unregister_netdev(dev);
@@ -1814,13 +1774,13 @@ static void rtl_hw_start(struct net_device *dev) 
{

	struct rtl8169_private *tp = netdev_priv(dev);

	void __iomem *ioaddr = tp->mmio_addr;

	u32 i;

	unsigned int i;



	/* Soft reset the chip. */

	RTL_W8(ChipCmd, CmdReset);



	/* Check that the chip has finished the reset. */

	for (i = 100; i > 0; i--) {

	for (i = 0; i < 100; i++) {

		if ((RTL_R8(ChipCmd) & CmdReset) == 0)

			break;

		msleep_interruptible(1);
@@ -2132,7 +2092,7 @@ err_out: 


static void rtl8169_rx_clear(struct rtl8169_private *tp)

{

	int i;

	unsigned int i;



	for (i = 0; i < NUM_RX_DESC; i++) {

		if (tp->Rx_skbuff[i]) {
@@ -2274,15 +2234,10 @@ static void rtl8169_reinit_task(struct work_struct *work) 


	ret = rtl8169_open(dev);

	if (unlikely(ret < 0)) {

		if (net_ratelimit()) {

			struct rtl8169_private *tp = netdev_priv(dev);



			if (netif_msg_drv(tp)) {

				printk(PFX KERN_ERR

				       "%s: reinit failure (status = %d)."

		if (net_ratelimit() && netif_msg_drv(tp)) {

			printk(PFX KERN_ERR "%s: reinit failure (status = %d)."

			       " Rescheduling.\n", dev->name, ret);

		}

		}

		rtl8169_schedule_work(dev, rtl8169_reinit_task);

	}
@@ -2311,13 +2266,9 @@ static void rtl8169_reset_task(struct work_struct *work) 
		rtl_hw_start(dev);

		netif_wake_queue(dev);

	} else {

		if (net_ratelimit()) {

			struct rtl8169_private *tp = netdev_priv(dev);



			if (netif_msg_intr(tp)) {

				printk(PFX KERN_EMERG

				       "%s: Rx buffers shortage\n", dev->name);

			}

		if (net_ratelimit() && netif_msg_intr(tp)) {

			printk(PFX KERN_EMERG "%s: Rx buffers shortage\n",

			       dev->name);

		}

		rtl8169_schedule_work(dev, rtl8169_reset_task);

	}
@@ -2524,16 +2475,12 @@ static void rtl8169_pcierr_interrupt(struct net_device *dev) 
	rtl8169_schedule_work(dev, rtl8169_reinit_task);

}



static void

rtl8169_tx_interrupt(struct net_device *dev, struct rtl8169_private *tp,

static void rtl8169_tx_interrupt(struct net_device *dev,

				 struct rtl8169_private *tp,

				 void __iomem *ioaddr)

{

	unsigned int dirty_tx, tx_left;



	assert(dev != NULL);

	assert(tp != NULL);

	assert(ioaddr != NULL);



	dirty_tx = tp->dirty_tx;

	smp_rmb();

	tx_left = tp->cur_tx - dirty_tx;
@@ -2590,8 +2537,9 @@ static inline void rtl8169_rx_csum(struct sk_buff *skb, struct RxDesc *desc) 
		skb->ip_summed = CHECKSUM_NONE;

}



static inline bool rtl8169_try_rx_copy(struct sk_buff **sk_buff, int pkt_size,

				       struct pci_dev *pdev, dma_addr_t addr)

static inline bool rtl8169_try_rx_copy(struct sk_buff **sk_buff,

				       struct rtl8169_private *tp, int pkt_size,

				       dma_addr_t addr)

{

	struct sk_buff *skb;

	bool done = false;
@@ -2599,11 +2547,12 @@ static inline bool rtl8169_try_rx_copy(struct sk_buff **sk_buff, int pkt_size, 
	if (pkt_size >= rx_copybreak)

		goto out;



	skb = dev_alloc_skb(pkt_size + NET_IP_ALIGN);

	skb = netdev_alloc_skb(tp->dev, pkt_size + NET_IP_ALIGN);

	if (!skb)

		goto out;



	pci_dma_sync_single_for_cpu(pdev, addr, pkt_size, PCI_DMA_FROMDEVICE);

	pci_dma_sync_single_for_cpu(tp->pci_dev, addr, pkt_size,

				    PCI_DMA_FROMDEVICE);

	skb_reserve(skb, NET_IP_ALIGN);

	skb_copy_from_linear_data(*sk_buff, skb->data, pkt_size);

	*sk_buff = skb;
@@ -2612,17 +2561,13 @@ out: 
	return done;

}



static int

rtl8169_rx_interrupt(struct net_device *dev, struct rtl8169_private *tp,

static int rtl8169_rx_interrupt(struct net_device *dev,

				struct rtl8169_private *tp,

				void __iomem *ioaddr)

{

	unsigned int cur_rx, rx_left;

	unsigned int delta, count;



	assert(dev != NULL);

	assert(tp != NULL);

	assert(ioaddr != NULL);



	cur_rx = tp->cur_rx;

	rx_left = NUM_RX_DESC + tp->dirty_rx - cur_rx;

	rx_left = rtl8169_rx_quota(rx_left, (u32) dev->quota);
@@ -2673,7 +2618,7 @@ rtl8169_rx_interrupt(struct net_device *dev, struct rtl8169_private *tp, 


			rtl8169_rx_csum(skb, desc);



			if (rtl8169_try_rx_copy(&skb, pkt_size, pdev, addr)) {

			if (rtl8169_try_rx_copy(&skb, tp, pkt_size, addr)) {

				pci_dma_sync_single_for_device(pdev, addr,

					pkt_size, PCI_DMA_FROMDEVICE);

				rtl8169_mark_to_asic(desc, tp->rx_buf_sz);
@@ -2723,11 +2668,9 @@ rtl8169_rx_interrupt(struct net_device *dev, struct rtl8169_private *tp, 
	return count;

}



/* The interrupt handler does all of the Rx thread work and cleans up after the Tx thread. */

static irqreturn_t

rtl8169_interrupt(int irq, void *dev_instance)

static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance)

{

	struct net_device *dev = (struct net_device *) dev_instance;

	struct net_device *dev = dev_instance;

	struct rtl8169_private *tp = netdev_priv(dev);

	int boguscnt = max_interrupt_work;

	void __iomem *ioaddr = tp->mmio_addr;
@@ -2784,9 +2727,9 @@ rtl8169_interrupt(int irq, void *dev_instance) 
		break;

#else

		/* Rx interrupt */

		if (status & (RxOK | RxOverflow | RxFIFOOver)) {

		if (status & (RxOK | RxOverflow | RxFIFOOver))

			rtl8169_rx_interrupt(dev, tp, ioaddr);

		}



		/* Tx interrupt */

		if (status & (TxOK | TxErr))

			rtl8169_tx_interrupt(dev, tp, ioaddr);
@@ -2918,7 +2861,7 @@ static void rtl_set_rx_mode(struct net_device *dev) 
	void __iomem *ioaddr = tp->mmio_addr;

	unsigned long flags;

	u32 mc_filter[2];	/* Multicast hash filter */

	int i, rx_mode;

	int rx_mode;

	u32 tmp = 0;



	if (dev->flags & IFF_PROMISC) {
@@ -2938,6 +2881,8 @@ static void rtl_set_rx_mode(struct net_device *dev) 
		mc_filter[1] = mc_filter[0] = 0xffffffff;

	} else {

		struct dev_mc_list *mclist;

		unsigned int i;



		rx_mode = AcceptBroadcast | AcceptMyPhys;

		mc_filter[1] = mc_filter[0] = 0;

		for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
@@ -3053,14 +2998,12 @@ static struct pci_driver rtl8169_pci_driver = { 
#endif

};



static int __init

rtl8169_init_module(void)

static int __init rtl8169_init_module(void)

{

	return pci_register_driver(&rtl8169_pci_driver);

}



static void __exit

rtl8169_cleanup_module(void)

static void __exit rtl8169_cleanup_module(void)

{

	pci_unregister_driver(&rtl8169_pci_driver);

}

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